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Diffstat (limited to 'drivers/scsi/aic7xxx_old.c')
| -rw-r--r-- | drivers/scsi/aic7xxx_old.c | 11178 |
1 files changed, 11178 insertions, 0 deletions
diff --git a/drivers/scsi/aic7xxx_old.c b/drivers/scsi/aic7xxx_old.c new file mode 100644 index 00000000000..a6e7bb0d53f --- /dev/null +++ b/drivers/scsi/aic7xxx_old.c @@ -0,0 +1,11178 @@ +/*+M************************************************************************* + * Adaptec AIC7xxx device driver for Linux. + * + * Copyright (c) 1994 John Aycock + * The University of Calgary Department of Computer Science. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F + * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA + * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, + * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, + * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file + * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, + * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the + * ANSI SCSI-2 specification (draft 10c), ... + * + * -------------------------------------------------------------------------- + * + * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org): + * + * Substantially modified to include support for wide and twin bus + * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, + * SCB paging, and other rework of the code. + * + * Parts of this driver were also based on the FreeBSD driver by + * Justin T. Gibbs. His copyright follows: + * + * -------------------------------------------------------------------------- + * Copyright (c) 1994-1997 Justin Gibbs. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification, immediately at the beginning of the file. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Where this Software is combined with software released under the terms of + * the GNU General Public License ("GPL") and the terms of the GPL would require the + * combined work to also be released under the terms of the GPL, the terms + * and conditions of this License will apply in addition to those of the + * GPL with the exception of any terms or conditions of this License that + * conflict with, or are expressly prohibited by, the GPL. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $Id: aic7xxx.c,v 1.119 1997/06/27 19:39:18 gibbs Exp $ + *--------------------------------------------------------------------------- + * + * Thanks also go to (in alphabetical order) the following: + * + * Rory Bolt - Sequencer bug fixes + * Jay Estabrook - Initial DEC Alpha support + * Doug Ledford - Much needed abort/reset bug fixes + * Kai Makisara - DMAing of SCBs + * + * A Boot time option was also added for not resetting the scsi bus. + * + * Form: aic7xxx=extended + * aic7xxx=no_reset + * aic7xxx=ultra + * aic7xxx=irq_trigger:[0,1] # 0 edge, 1 level + * aic7xxx=verbose + * + * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 + * + * $Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp $ + *-M*************************************************************************/ + +/*+M************************************************************************** + * + * Further driver modifications made by Doug Ledford <dledford@redhat.com> + * + * Copyright (c) 1997-1999 Doug Ledford + * + * These changes are released under the same licensing terms as the FreeBSD + * driver written by Justin Gibbs. Please see his Copyright notice above + * for the exact terms and conditions covering my changes as well as the + * warranty statement. + * + * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include + * but are not limited to: + * + * 1: Import of the latest FreeBSD sequencer code for this driver + * 2: Modification of kernel code to accommodate different sequencer semantics + * 3: Extensive changes throughout kernel portion of driver to improve + * abort/reset processing and error hanndling + * 4: Other work contributed by various people on the Internet + * 5: Changes to printk information and verbosity selection code + * 6: General reliability related changes, especially in IRQ management + * 7: Modifications to the default probe/attach order for supported cards + * 8: SMP friendliness has been improved + * + * Overall, this driver represents a significant departure from the official + * aic7xxx driver released by Dan Eischen in two ways. First, in the code + * itself. A diff between the two version of the driver is now a several + * thousand line diff. Second, in approach to solving the same problem. The + * problem is importing the FreeBSD aic7xxx driver code to linux can be a + * difficult and time consuming process, that also can be error prone. Dan + * Eischen's official driver uses the approach that the linux and FreeBSD + * drivers should be as identical as possible. To that end, his next version + * of this driver will be using a mid-layer code library that he is developing + * to moderate communications between the linux mid-level SCSI code and the + * low level FreeBSD driver. He intends to be able to essentially drop the + * FreeBSD driver into the linux kernel with only a few minor tweaks to some + * include files and the like and get things working, making for fast easy + * imports of the FreeBSD code into linux. + * + * I disagree with Dan's approach. Not that I don't think his way of doing + * things would be nice, easy to maintain, and create a more uniform driver + * between FreeBSD and Linux. I have no objection to those issues. My + * disagreement is on the needed functionality. There simply are certain + * things that are done differently in FreeBSD than linux that will cause + * problems for this driver regardless of any middle ware Dan implements. + * The biggest example of this at the moment is interrupt semantics. Linux + * doesn't provide the same protection techniques as FreeBSD does, nor can + * they be easily implemented in any middle ware code since they would truly + * belong in the kernel proper and would effect all drivers. For the time + * being, I see issues such as these as major stumbling blocks to the + * reliability of code based upon such middle ware. Therefore, I choose to + * use a different approach to importing the FreeBSD code that doesn't + * involve any middle ware type code. My approach is to import the sequencer + * code from FreeBSD wholesale. Then, to only make changes in the kernel + * portion of the driver as they are needed for the new sequencer semantics. + * In this way, the portion of the driver that speaks to the rest of the + * linux kernel is fairly static and can be changed/modified to solve + * any problems one might encounter without concern for the FreeBSD driver. + * + * Note: If time and experience should prove me wrong that the middle ware + * code Dan writes is reliable in its operation, then I'll retract my above + * statements. But, for those that don't know, I'm from Missouri (in the US) + * and our state motto is "The Show-Me State". Well, before I will put + * faith into it, you'll have to show me that it works :) + * + *_M*************************************************************************/ + +/* + * The next three defines are user configurable. These should be the only + * defines a user might need to get in here and change. There are other + * defines buried deeper in the code, but those really shouldn't need touched + * under normal conditions. + */ + +/* + * AIC7XXX_STRICT_PCI_SETUP + * Should we assume the PCI config options on our controllers are set with + * sane and proper values, or should we be anal about our PCI config + * registers and force them to what we want? The main advantage to + * defining this option is on non-Intel hardware where the BIOS may not + * have been run to set things up, or if you have one of the BIOSless + * Adaptec controllers, such as a 2910, that don't get set up by the + * BIOS. However, keep in mind that we really do set the most important + * items in the driver regardless of this setting, this only controls some + * of the more esoteric PCI options on these cards. In that sense, I + * would default to leaving this off. However, if people wish to try + * things both ways, that would also help me to know if there are some + * machines where it works one way but not another. + * + * -- July 7, 17:09 + * OK...I need this on my machine for testing, so the default is to + * leave it defined. + * + * -- July 7, 18:49 + * I needed it for testing, but it didn't make any difference, so back + * off she goes. + * + * -- July 16, 23:04 + * I turned it back on to try and compensate for the 2.1.x PCI code + * which no longer relies solely on the BIOS and now tries to set + * things itself. + */ + +#define AIC7XXX_STRICT_PCI_SETUP + +/* + * AIC7XXX_VERBOSE_DEBUGGING + * This option enables a lot of extra printk();s in the code, surrounded + * by if (aic7xxx_verbose ...) statements. Executing all of those if + * statements and the extra checks can get to where it actually does have + * an impact on CPU usage and such, as well as code size. Disabling this + * define will keep some of those from becoming part of the code. + * + * NOTE: Currently, this option has no real effect, I will be adding the + * various #ifdef's in the code later when I've decided a section is + * complete and no longer needs debugging. OK...a lot of things are now + * surrounded by this define, so turning this off does have an impact. + */ + +/* + * #define AIC7XXX_VERBOSE_DEBUGGING + */ + +#include <linux/module.h> +#include <stdarg.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/byteorder.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/sched.h> +#include <linux/pci.h> +#include <linux/proc_fs.h> +#include <linux/blkdev.h> +#include <linux/init.h> +#include <linux/spinlock.h> +#include <linux/smp.h> +#include <linux/interrupt.h> +#include "scsi.h" +#include <scsi/scsi_host.h> +#include "aic7xxx_old/aic7xxx.h" + +#include "aic7xxx_old/sequencer.h" +#include "aic7xxx_old/scsi_message.h" +#include "aic7xxx_old/aic7xxx_reg.h" +#include <scsi/scsicam.h> + +#include <linux/stat.h> +#include <linux/slab.h> /* for kmalloc() */ + +#include <linux/config.h> /* for CONFIG_PCI */ + +#define AIC7XXX_C_VERSION "5.2.6" + +#define ALL_TARGETS -1 +#define ALL_CHANNELS -1 +#define ALL_LUNS -1 +#define MAX_TARGETS 16 +#define MAX_LUNS 8 +#ifndef TRUE +# define TRUE 1 +#endif +#ifndef FALSE +# define FALSE 0 +#endif + +#if defined(__powerpc__) || defined(__i386__) || defined(__x86_64__) +# define MMAPIO +#endif + +/* + * You can try raising me for better performance or lowering me if you have + * flaky devices that go off the scsi bus when hit with too many tagged + * commands (like some IBM SCSI-3 LVD drives). + */ +#define AIC7XXX_CMDS_PER_DEVICE 32 + +typedef struct +{ + unsigned char tag_commands[16]; /* Allow for wide/twin adapters. */ +} adapter_tag_info_t; + +/* + * Make a define that will tell the driver not to the default tag depth + * everywhere. + */ +#define DEFAULT_TAG_COMMANDS {0, 0, 0, 0, 0, 0, 0, 0,\ + 0, 0, 0, 0, 0, 0, 0, 0} + +/* + * Modify this as you see fit for your system. By setting tag_commands + * to 0, the driver will use it's own algorithm for determining the + * number of commands to use (see above). When 255, the driver will + * not enable tagged queueing for that particular device. When positive + * (> 0) and (< 255) the values in the array are used for the queue_depth. + * Note that the maximum value for an entry is 254, but you're insane if + * you try to use that many commands on one device. + * + * In this example, the first line will disable tagged queueing for all + * the devices on the first probed aic7xxx adapter. + * + * The second line enables tagged queueing with 4 commands/LUN for IDs + * (1, 2-11, 13-15), disables tagged queueing for ID 12, and tells the + * driver to use its own algorithm for ID 1. + * + * The third line is the same as the first line. + * + * The fourth line disables tagged queueing for devices 0 and 3. It + * enables tagged queueing for the other IDs, with 16 commands/LUN + * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for + * IDs 2, 5-7, and 9-15. + */ + +/* + * NOTE: The below structure is for reference only, the actual structure + * to modify in order to change things is found after this fake one. + * +adapter_tag_info_t aic7xxx_tag_info[] = +{ + {DEFAULT_TAG_COMMANDS}, + {{4, 0, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 255, 4, 4, 4}}, + {DEFAULT_TAG_COMMANDS}, + {{255, 16, 4, 255, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} +}; +*/ + +static adapter_tag_info_t aic7xxx_tag_info[] = +{ + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS}, + {DEFAULT_TAG_COMMANDS} +}; + + +/* + * Define an array of board names that can be indexed by aha_type. + * Don't forget to change this when changing the types! + */ +static const char *board_names[] = { + "AIC-7xxx Unknown", /* AIC_NONE */ + "Adaptec AIC-7810 Hardware RAID Controller", /* AIC_7810 */ + "Adaptec AIC-7770 SCSI host adapter", /* AIC_7770 */ + "Adaptec AHA-274X SCSI host adapter", /* AIC_7771 */ + "Adaptec AHA-284X SCSI host adapter", /* AIC_284x */ + "Adaptec AIC-7850 SCSI host adapter", /* AIC_7850 */ + "Adaptec AIC-7855 SCSI host adapter", /* AIC_7855 */ + "Adaptec AIC-7860 Ultra SCSI host adapter", /* AIC_7860 */ + "Adaptec AHA-2940A Ultra SCSI host adapter", /* AIC_7861 */ + "Adaptec AIC-7870 SCSI host adapter", /* AIC_7870 */ + "Adaptec AHA-294X SCSI host adapter", /* AIC_7871 */ + "Adaptec AHA-394X SCSI host adapter", /* AIC_7872 */ + "Adaptec AHA-398X SCSI host adapter", /* AIC_7873 */ + "Adaptec AHA-2944 SCSI host adapter", /* AIC_7874 */ + "Adaptec AIC-7880 Ultra SCSI host adapter", /* AIC_7880 */ + "Adaptec AHA-294X Ultra SCSI host adapter", /* AIC_7881 */ + "Adaptec AHA-394X Ultra SCSI host adapter", /* AIC_7882 */ + "Adaptec AHA-398X Ultra SCSI host adapter", /* AIC_7883 */ + "Adaptec AHA-2944 Ultra SCSI host adapter", /* AIC_7884 */ + "Adaptec AHA-2940UW Pro Ultra SCSI host adapter", /* AIC_7887 */ + "Adaptec AIC-7895 Ultra SCSI host adapter", /* AIC_7895 */ + "Adaptec AIC-7890/1 Ultra2 SCSI host adapter", /* AIC_7890 */ + "Adaptec AHA-293X Ultra2 SCSI host adapter", /* AIC_7890 */ + "Adaptec AHA-294X Ultra2 SCSI host adapter", /* AIC_7890 */ + "Adaptec AIC-7896/7 Ultra2 SCSI host adapter", /* AIC_7896 */ + "Adaptec AHA-394X Ultra2 SCSI host adapter", /* AIC_7897 */ + "Adaptec AHA-395X Ultra2 SCSI host adapter", /* AIC_7897 */ + "Adaptec PCMCIA SCSI controller", /* card bus stuff */ + "Adaptec AIC-7892 Ultra 160/m SCSI host adapter", /* AIC_7892 */ + "Adaptec AIC-7899 Ultra 160/m SCSI host adapter", /* AIC_7899 */ +}; + +/* + * There should be a specific return value for this in scsi.h, but + * it seems that most drivers ignore it. + */ +#define DID_UNDERFLOW DID_ERROR + +/* + * What we want to do is have the higher level scsi driver requeue + * the command to us. There is no specific driver status for this + * condition, but the higher level scsi driver will requeue the + * command on a DID_BUS_BUSY error. + * + * Upon further inspection and testing, it seems that DID_BUS_BUSY + * will *always* retry the command. We can get into an infinite loop + * if this happens when we really want some sort of counter that + * will automatically abort/reset the command after so many retries. + * Using DID_ERROR will do just that. (Made by a suggestion by + * Doug Ledford 8/1/96) + */ +#define DID_RETRY_COMMAND DID_ERROR + +#define HSCSIID 0x07 +#define SCSI_RESET 0x040 + +/* + * EISA/VL-bus stuff + */ +#define MINSLOT 1 +#define MAXSLOT 15 +#define SLOTBASE(x) ((x) << 12) +#define BASE_TO_SLOT(x) ((x) >> 12) + +/* + * Standard EISA Host ID regs (Offset from slot base) + */ +#define AHC_HID0 0x80 /* 0,1: msb of ID2, 2-7: ID1 */ +#define AHC_HID1 0x81 /* 0-4: ID3, 5-7: LSB ID2 */ +#define AHC_HID2 0x82 /* product */ +#define AHC_HID3 0x83 /* firmware revision */ + +/* + * AIC-7770 I/O range to reserve for a card + */ +#define MINREG 0xC00 +#define MAXREG 0xCFF + +#define INTDEF 0x5C /* Interrupt Definition Register */ + +/* + * AIC-78X0 PCI registers + */ +#define CLASS_PROGIF_REVID 0x08 +#define DEVREVID 0x000000FFul +#define PROGINFC 0x0000FF00ul +#define SUBCLASS 0x00FF0000ul +#define BASECLASS 0xFF000000ul + +#define CSIZE_LATTIME 0x0C +#define CACHESIZE 0x0000003Ful /* only 5 bits */ +#define LATTIME 0x0000FF00ul + +#define DEVCONFIG 0x40 +#define SCBSIZE32 0x00010000ul /* aic789X only */ +#define MPORTMODE 0x00000400ul /* aic7870 only */ +#define RAMPSM 0x00000200ul /* aic7870 only */ +#define RAMPSM_ULTRA2 0x00000004 +#define VOLSENSE 0x00000100ul +#define SCBRAMSEL 0x00000080ul +#define SCBRAMSEL_ULTRA2 0x00000008 +#define MRDCEN 0x00000040ul +#define EXTSCBTIME 0x00000020ul /* aic7870 only */ +#define EXTSCBPEN 0x00000010ul /* aic7870 only */ +#define BERREN 0x00000008ul +#define DACEN 0x00000004ul +#define STPWLEVEL 0x00000002ul +#define DIFACTNEGEN 0x00000001ul /* aic7870 only */ + +#define SCAMCTL 0x1a /* Ultra2 only */ +#define CCSCBBADDR 0xf0 /* aic7895/6/7 */ + +/* + * Define the different types of SEEPROMs on aic7xxx adapters + * and make it also represent the address size used in accessing + * its registers. The 93C46 chips have 1024 bits organized into + * 64 16-bit words, while the 93C56 chips have 2048 bits organized + * into 128 16-bit words. The C46 chips use 6 bits to address + * each word, while the C56 and C66 (4096 bits) use 8 bits to + * address each word. + */ +typedef enum {C46 = 6, C56_66 = 8} seeprom_chip_type; + +/* + * + * Define the format of the SEEPROM registers (16 bits). + * + */ +struct seeprom_config { + +/* + * SCSI ID Configuration Flags + */ +#define CFXFER 0x0007 /* synchronous transfer rate */ +#define CFSYNCH 0x0008 /* enable synchronous transfer */ +#define CFDISC 0x0010 /* enable disconnection */ +#define CFWIDEB 0x0020 /* wide bus device (wide card) */ +#define CFSYNCHISULTRA 0x0040 /* CFSYNC is an ultra offset */ +#define CFNEWULTRAFORMAT 0x0080 /* Use the Ultra2 SEEPROM format */ +#define CFSTART 0x0100 /* send start unit SCSI command */ +#define CFINCBIOS 0x0200 /* include in BIOS scan */ +#define CFRNFOUND 0x0400 /* report even if not found */ +#define CFMULTILUN 0x0800 /* probe mult luns in BIOS scan */ +#define CFWBCACHEYES 0x4000 /* Enable W-Behind Cache on drive */ +#define CFWBCACHENC 0xc000 /* Don't change W-Behind Cache */ +/* UNUSED 0x3000 */ + unsigned short device_flags[16]; /* words 0-15 */ + +/* + * BIOS Control Bits + */ +#define CFSUPREM 0x0001 /* support all removable drives */ +#define CFSUPREMB 0x0002 /* support removable drives for boot only */ +#define CFBIOSEN 0x0004 /* BIOS enabled */ +/* UNUSED 0x0008 */ +#define CFSM2DRV 0x0010 /* support more than two drives */ +#define CF284XEXTEND 0x0020 /* extended translation (284x cards) */ +/* UNUSED 0x0040 */ +#define CFEXTEND 0x0080 /* extended translation enabled */ +/* UNUSED 0xFF00 */ + unsigned short bios_control; /* word 16 */ + +/* + * Host Adapter Control Bits + */ +#define CFAUTOTERM 0x0001 /* Perform Auto termination */ +#define CFULTRAEN 0x0002 /* Ultra SCSI speed enable (Ultra cards) */ +#define CF284XSELTO 0x0003 /* Selection timeout (284x cards) */ +#define CF284XFIFO 0x000C /* FIFO Threshold (284x cards) */ +#define CFSTERM 0x0004 /* SCSI low byte termination */ +#define CFWSTERM 0x0008 /* SCSI high byte termination (wide card) */ +#define CFSPARITY 0x0010 /* SCSI parity */ +#define CF284XSTERM 0x0020 /* SCSI low byte termination (284x cards) */ +#define CFRESETB 0x0040 /* reset SCSI bus at boot */ +#define CFBPRIMARY 0x0100 /* Channel B primary on 7895 chipsets */ +#define CFSEAUTOTERM 0x0400 /* aic7890 Perform SE Auto Term */ +#define CFLVDSTERM 0x0800 /* aic7890 LVD Termination */ +/* UNUSED 0xF280 */ + unsigned short adapter_control; /* word 17 */ + +/* + * Bus Release, Host Adapter ID + */ +#define CFSCSIID 0x000F /* host adapter SCSI ID */ +/* UNUSED 0x00F0 */ +#define CFBRTIME 0xFF00 /* bus release time */ + unsigned short brtime_id; /* word 18 */ + +/* + * Maximum targets + */ +#define CFMAXTARG 0x00FF /* maximum targets */ +/* UNUSED 0xFF00 */ + unsigned short max_targets; /* word 19 */ + + unsigned short res_1[11]; /* words 20-30 */ + unsigned short checksum; /* word 31 */ +}; + +#define SELBUS_MASK 0x0a +#define SELNARROW 0x00 +#define SELBUSB 0x08 +#define SINGLE_BUS 0x00 + +#define SCB_TARGET(scb) \ + (((scb)->hscb->target_channel_lun & TID) >> 4) +#define SCB_LUN(scb) \ + ((scb)->hscb->target_channel_lun & LID) +#define SCB_IS_SCSIBUS_B(scb) \ + (((scb)->hscb->target_channel_lun & SELBUSB) != 0) + +/* + * If an error occurs during a data transfer phase, run the command + * to completion - it's easier that way - making a note of the error + * condition in this location. This then will modify a DID_OK status + * into an appropriate error for the higher-level SCSI code. + */ +#define aic7xxx_error(cmd) ((cmd)->SCp.Status) + +/* + * Keep track of the targets returned status. + */ +#define aic7xxx_status(cmd) ((cmd)->SCp.sent_command) + +/* + * The position of the SCSI commands scb within the scb array. + */ +#define aic7xxx_position(cmd) ((cmd)->SCp.have_data_in) + +/* + * The stored DMA mapping for single-buffer data transfers. + */ +#define aic7xxx_mapping(cmd) ((cmd)->SCp.phase) + +/* + * Get out private data area from a scsi cmd pointer + */ +#define AIC_DEV(cmd) ((struct aic_dev_data *)(cmd)->device->hostdata) + +/* + * So we can keep track of our host structs + */ +static struct aic7xxx_host *first_aic7xxx = NULL; + +/* + * As of Linux 2.1, the mid-level SCSI code uses virtual addresses + * in the scatter-gather lists. We need to convert the virtual + * addresses to physical addresses. + */ +struct hw_scatterlist { + unsigned int address; + unsigned int length; +}; + +/* + * Maximum number of SG segments these cards can support. + */ +#define AIC7XXX_MAX_SG 128 + +/* + * The maximum number of SCBs we could have for ANY type + * of card. DON'T FORGET TO CHANGE THE SCB MASK IN THE + * SEQUENCER CODE IF THIS IS MODIFIED! + */ +#define AIC7XXX_MAXSCB 255 + + +struct aic7xxx_hwscb { +/* ------------ Begin hardware supported fields ---------------- */ +/* 0*/ unsigned char control; +/* 1*/ unsigned char target_channel_lun; /* 4/1/3 bits */ +/* 2*/ unsigned char target_status; +/* 3*/ unsigned char SG_segment_count; +/* 4*/ unsigned int SG_list_pointer; +/* 8*/ unsigned char residual_SG_segment_count; +/* 9*/ unsigned char residual_data_count[3]; +/*12*/ unsigned int data_pointer; +/*16*/ unsigned int data_count; +/*20*/ unsigned int SCSI_cmd_pointer; +/*24*/ unsigned char SCSI_cmd_length; +/*25*/ unsigned char tag; /* Index into our kernel SCB array. + * Also used as the tag for tagged I/O + */ +#define SCB_PIO_TRANSFER_SIZE 26 /* amount we need to upload/download + * via PIO to initialize a transaction. + */ +/*26*/ unsigned char next; /* Used to thread SCBs awaiting selection + * or disconnected down in the sequencer. + */ +/*27*/ unsigned char prev; +/*28*/ unsigned int pad; /* + * Unused by the kernel, but we require + * the padding so that the array of + * hardware SCBs is aligned on 32 byte + * boundaries so the sequencer can index + */ +}; + +typedef enum { + SCB_FREE = 0x0000, + SCB_DTR_SCB = 0x0001, + SCB_WAITINGQ = 0x0002, + SCB_ACTIVE = 0x0004, + SCB_SENSE = 0x0008, + SCB_ABORT = 0x0010, + SCB_DEVICE_RESET = 0x0020, + SCB_RESET = 0x0040, + SCB_RECOVERY_SCB = 0x0080, + SCB_MSGOUT_PPR = 0x0100, + SCB_MSGOUT_SENT = 0x0200, + SCB_MSGOUT_SDTR = 0x0400, + SCB_MSGOUT_WDTR = 0x0800, + SCB_MSGOUT_BITS = SCB_MSGOUT_PPR | + SCB_MSGOUT_SENT | + SCB_MSGOUT_SDTR | + SCB_MSGOUT_WDTR, + SCB_QUEUED_ABORT = 0x1000, + SCB_QUEUED_FOR_DONE = 0x2000, + SCB_WAS_BUSY = 0x4000, + SCB_QUEUE_FULL = 0x8000 +} scb_flag_type; + +typedef enum { + AHC_FNONE = 0x00000000, + AHC_PAGESCBS = 0x00000001, + AHC_CHANNEL_B_PRIMARY = 0x00000002, + AHC_USEDEFAULTS = 0x00000004, + AHC_INDIRECT_PAGING = 0x00000008, + AHC_CHNLB = 0x00000020, + AHC_CHNLC = 0x00000040, + AHC_EXTEND_TRANS_A = 0x00000100, + AHC_EXTEND_TRANS_B = 0x00000200, + AHC_TERM_ENB_A = 0x00000400, + AHC_TERM_ENB_SE_LOW = 0x00000400, + AHC_TERM_ENB_B = 0x00000800, + AHC_TERM_ENB_SE_HIGH = 0x00000800, + AHC_HANDLING_REQINITS = 0x00001000, + AHC_TARGETMODE = 0x00002000, + AHC_NEWEEPROM_FMT = 0x00004000, + /* + * Here ends the FreeBSD defined flags and here begins the linux defined + * flags. NOTE: I did not preserve the old flag name during this change + * specifically to force me to evaluate what flags were being used properly + * and what flags weren't. This way, I could clean up the flag usage on + * a use by use basis. Doug Ledford + */ + AHC_MOTHERBOARD = 0x00020000, + AHC_NO_STPWEN = 0x00040000, + AHC_RESET_DELAY = 0x00080000, + AHC_A_SCANNED = 0x00100000, + AHC_B_SCANNED = 0x00200000, + AHC_MULTI_CHANNEL = 0x00400000, + AHC_BIOS_ENABLED = 0x00800000, + AHC_SEEPROM_FOUND = 0x01000000, + AHC_TERM_ENB_LVD = 0x02000000, + AHC_ABORT_PENDING = 0x04000000, + AHC_RESET_PENDING = 0x08000000, +#define AHC_IN_ISR_BIT 28 + AHC_IN_ISR = 0x10000000, + AHC_IN_ABORT = 0x20000000, + AHC_IN_RESET = 0x40000000, + AHC_EXTERNAL_SRAM = 0x80000000 +} ahc_flag_type; + +typedef enum { + AHC_NONE = 0x0000, + AHC_CHIPID_MASK = 0x00ff, + AHC_AIC7770 = 0x0001, + AHC_AIC7850 = 0x0002, + AHC_AIC7860 = 0x0003, + AHC_AIC7870 = 0x0004, + AHC_AIC7880 = 0x0005, + AHC_AIC7890 = 0x0006, + AHC_AIC7895 = 0x0007, + AHC_AIC7896 = 0x0008, + AHC_AIC7892 = 0x0009, + AHC_AIC7899 = 0x000a, + AHC_VL = 0x0100, + AHC_EISA = 0x0200, + AHC_PCI = 0x0400, +} ahc_chip; + +typedef enum { + AHC_FENONE = 0x0000, + AHC_ULTRA = 0x0001, + AHC_ULTRA2 = 0x0002, + AHC_WIDE = 0x0004, + AHC_TWIN = 0x0008, + AHC_MORE_SRAM = 0x0010, + AHC_CMD_CHAN = 0x0020, + AHC_QUEUE_REGS = 0x0040, + AHC_SG_PRELOAD = 0x0080, + AHC_SPIOCAP = 0x0100, + AHC_ULTRA3 = 0x0200, + AHC_NEW_AUTOTERM = 0x0400, + AHC_AIC7770_FE = AHC_FENONE, + AHC_AIC7850_FE = AHC_SPIOCAP, + AHC_AIC7860_FE = AHC_ULTRA|AHC_SPIOCAP, + AHC_AIC7870_FE = AHC_FENONE, + AHC_AIC7880_FE = AHC_ULTRA, + AHC_AIC7890_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2| + AHC_QUEUE_REGS|AHC_SG_PRELOAD|AHC_NEW_AUTOTERM, + AHC_AIC7895_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA, + AHC_AIC7896_FE = AHC_AIC7890_FE, + AHC_AIC7892_FE = AHC_AIC7890_FE|AHC_ULTRA3, + AHC_AIC7899_FE = AHC_AIC7890_FE|AHC_ULTRA3, +} ahc_feature; + +#define SCB_DMA_ADDR(scb, addr) ((unsigned long)(addr) + (scb)->scb_dma->dma_offset) + +struct aic7xxx_scb_dma { + unsigned long dma_offset; /* Correction you have to add + * to virtual address to get + * dma handle in this region */ + dma_addr_t dma_address; /* DMA handle of the start, + * for unmap */ + unsigned int dma_len; /* DMA length */ +}; + +typedef enum { + AHC_BUG_NONE = 0x0000, + AHC_BUG_TMODE_WIDEODD = 0x0001, + AHC_BUG_AUTOFLUSH = 0x0002, + AHC_BUG_CACHETHEN = 0x0004, + AHC_BUG_CACHETHEN_DIS = 0x0008, + AHC_BUG_PCI_2_1_RETRY = 0x0010, + AHC_BUG_PCI_MWI = 0x0020, + AHC_BUG_SCBCHAN_UPLOAD = 0x0040, +} ahc_bugs; + +struct aic7xxx_scb { + struct aic7xxx_hwscb *hscb; /* corresponding hardware scb */ + Scsi_Cmnd *cmd; /* Scsi_Cmnd for this scb */ + struct aic7xxx_scb *q_next; /* next scb in queue */ + volatile scb_flag_type flags; /* current state of scb */ + struct hw_scatterlist *sg_list; /* SG list in adapter format */ + unsigned char tag_action; + unsigned char sg_count; + unsigned char *sense_cmd; /* + * Allocate 6 characters for + * sense command. + */ + unsigned char *cmnd; + unsigned int sg_length; /* We init this during buildscb so we + * don't have to calculate anything + * during underflow/overflow/stat code + */ + void *kmalloc_ptr; + struct aic7xxx_scb_dma *scb_dma; +}; + +/* + * Define a linked list of SCBs. + */ +typedef struct { + struct aic7xxx_scb *head; + struct aic7xxx_scb *tail; +} scb_queue_type; + +static struct { + unsigned char errno; + const char *errmesg; +} hard_error[] = { + { ILLHADDR, "Illegal Host Access" }, + { ILLSADDR, "Illegal Sequencer Address referenced" }, + { ILLOPCODE, "Illegal Opcode in sequencer program" }, + { SQPARERR, "Sequencer Ram Parity Error" }, + { DPARERR, "Data-Path Ram Parity Error" }, + { MPARERR, "Scratch Ram/SCB Array Ram Parity Error" }, + { PCIERRSTAT,"PCI Error detected" }, + { CIOPARERR, "CIOBUS Parity Error" } +}; + +static unsigned char +generic_sense[] = { REQUEST_SENSE, 0, 0, 0, 255, 0 }; + +typedef struct { + scb_queue_type free_scbs; /* + * SCBs assigned to free slot on + * card (no paging required) + */ + struct aic7xxx_scb *scb_array[AIC7XXX_MAXSCB]; + struct aic7xxx_hwscb *hscbs; + unsigned char numscbs; /* current number of scbs */ + unsigned char maxhscbs; /* hardware scbs */ + unsigned char maxscbs; /* max scbs including pageable scbs */ + dma_addr_t hscbs_dma; /* DMA handle to hscbs */ + unsigned int hscbs_dma_len; /* length of the above DMA area */ + void *hscb_kmalloc_ptr; +} scb_data_type; + +struct target_cmd { + unsigned char mesg_bytes[4]; + unsigned char command[28]; +}; + +#define AHC_TRANS_CUR 0x0001 +#define AHC_TRANS_ACTIVE 0x0002 +#define AHC_TRANS_GOAL 0x0004 +#define AHC_TRANS_USER 0x0008 +#define AHC_TRANS_QUITE 0x0010 +typedef struct { + unsigned char width; + unsigned char period; + unsigned char offset; + unsigned char options; +} transinfo_type; + +struct aic_dev_data { + volatile scb_queue_type delayed_scbs; + volatile unsigned short temp_q_depth; + unsigned short max_q_depth; + volatile unsigned char active_cmds; + /* + * Statistics Kept: + * + * Total Xfers (count for each command that has a data xfer), + * broken down by reads && writes. + * + * Further sorted into a few bins for keeping tabs on how many commands + * we get of various sizes. + * + */ + long w_total; /* total writes */ + long r_total; /* total reads */ + long barrier_total; /* total num of REQ_BARRIER commands */ + long ordered_total; /* How many REQ_BARRIER commands we + used ordered tags to satisfy */ + long w_bins[6]; /* binned write */ + long r_bins[6]; /* binned reads */ + transinfo_type cur; + transinfo_type goal; +#define BUS_DEVICE_RESET_PENDING 0x01 +#define DEVICE_RESET_DELAY 0x02 +#define DEVICE_PRINT_DTR 0x04 +#define DEVICE_WAS_BUSY 0x08 +#define DEVICE_DTR_SCANNED 0x10 +#define DEVICE_SCSI_3 0x20 + volatile unsigned char flags; + unsigned needppr:1; + unsigned needppr_copy:1; + unsigned needsdtr:1; + unsigned needsdtr_copy:1; + unsigned needwdtr:1; + unsigned needwdtr_copy:1; + unsigned dtr_pending:1; + struct scsi_device *SDptr; + struct list_head list; +}; + +/* + * Define a structure used for each host adapter. Note, in order to avoid + * problems with architectures I can't test on (because I don't have one, + * such as the Alpha based systems) which happen to give faults for + * non-aligned memory accesses, care was taken to align this structure + * in a way that gauranteed all accesses larger than 8 bits were aligned + * on the appropriate boundary. It's also organized to try and be more + * cache line efficient. Be careful when changing this lest you might hurt + * overall performance and bring down the wrath of the masses. + */ +struct aic7xxx_host { + /* + * This is the first 64 bytes in the host struct + */ + + /* + * We are grouping things here....first, items that get either read or + * written with nearly every interrupt + */ + volatile long flags; + ahc_feature features; /* chip features */ + unsigned long base; /* card base address */ + volatile unsigned char __iomem *maddr; /* memory mapped address */ + unsigned long isr_count; /* Interrupt count */ + unsigned long spurious_int; + scb_data_type *scb_data; + struct aic7xxx_cmd_queue { + Scsi_Cmnd *head; + Scsi_Cmnd *tail; + } completeq; + + /* + * Things read/written on nearly every entry into aic7xxx_queue() + */ + volatile scb_queue_type waiting_scbs; + unsigned char unpause; /* unpause value for HCNTRL */ + unsigned char pause; /* pause value for HCNTRL */ + volatile unsigned char qoutfifonext; + volatile unsigned char activescbs; /* active scbs */ + volatile unsigned char max_activescbs; + volatile unsigned char qinfifonext; + volatile unsigned char *untagged_scbs; + volatile unsigned char *qoutfifo; + volatile unsigned char *qinfifo; + + unsigned char dev_last_queue_full[MAX_TARGETS]; + unsigned char dev_last_queue_full_count[MAX_TARGETS]; + unsigned short ultraenb; /* Gets downloaded to card as a + bitmap */ + unsigned short discenable; /* Gets downloaded to card as a + bitmap */ + transinfo_type user[MAX_TARGETS]; + + unsigned char msg_buf[13]; /* The message for the target */ + unsigned char msg_type; +#define MSG_TYPE_NONE 0x00 +#define MSG_TYPE_INITIATOR_MSGOUT 0x01 +#define MSG_TYPE_INITIATOR_MSGIN 0x02 + unsigned char msg_len; /* Length of message */ + unsigned char msg_index; /* Index into msg_buf array */ + + + /* + * We put the less frequently used host structure items after the more + * frequently used items to try and ease the burden on the cache subsystem. + * These entries are not *commonly* accessed, whereas the preceding entries + * are accessed very often. + */ + + unsigned int irq; /* IRQ for this adapter */ + int instance; /* aic7xxx instance number */ + int scsi_id; /* host adapter SCSI ID */ + int scsi_id_b; /* channel B for twin adapters */ + unsigned int bios_address; + int board_name_index; + unsigned short bios_control; /* bios control - SEEPROM */ + unsigned short adapter_control; /* adapter control - SEEPROM */ + struct pci_dev *pdev; + unsigned char pci_bus; + unsigned char pci_device_fn; + struct seeprom_config sc; + unsigned short sc_type; + unsigned short sc_size; + struct aic7xxx_host *next; /* allow for multiple IRQs */ + struct Scsi_Host *host; /* pointer to scsi host */ + struct list_head aic_devs; /* all aic_dev structs on host */ + int host_no; /* SCSI host number */ + unsigned long mbase; /* I/O memory address */ + ahc_chip chip; /* chip type */ + ahc_bugs bugs; + dma_addr_t fifo_dma; /* DMA handle for fifo arrays */ + +}; + +/* + * Valid SCSIRATE values. (p. 3-17) + * Provides a mapping of transfer periods in ns/4 to the proper value to + * stick in the SCSIRATE reg to use that transfer rate. + */ +#define AHC_SYNCRATE_ULTRA3 0 +#define AHC_SYNCRATE_ULTRA2 1 +#define AHC_SYNCRATE_ULTRA 3 +#define AHC_SYNCRATE_FAST 6 +#define AHC_SYNCRATE_CRC 0x40 +#define AHC_SYNCRATE_SE 0x10 +static struct aic7xxx_syncrate { + /* Rates in Ultra mode have bit 8 of sxfr set */ +#define ULTRA_SXFR 0x100 + int sxfr_ultra2; + int sxfr; + unsigned char period; + const char *rate[2]; +} aic7xxx_syncrates[] = { + { 0x42, 0x000, 9, {"80.0", "160.0"} }, + { 0x13, 0x000, 10, {"40.0", "80.0"} }, + { 0x14, 0x000, 11, {"33.0", "66.6"} }, + { 0x15, 0x100, 12, {"20.0", "40.0"} }, + { 0x16, 0x110, 15, {"16.0", "32.0"} }, + { 0x17, 0x120, 18, {"13.4", "26.8"} }, + { 0x18, 0x000, 25, {"10.0", "20.0"} }, + { 0x19, 0x010, 31, {"8.0", "16.0"} }, + { 0x1a, 0x020, 37, {"6.67", "13.3"} }, + { 0x1b, 0x030, 43, {"5.7", "11.4"} }, + { 0x10, 0x040, 50, {"5.0", "10.0"} }, + { 0x00, 0x050, 56, {"4.4", "8.8" } }, + { 0x00, 0x060, 62, {"4.0", "8.0" } }, + { 0x00, 0x070, 68, {"3.6", "7.2" } }, + { 0x00, 0x000, 0, {NULL, NULL} }, +}; + +#define CTL_OF_SCB(scb) (((scb->hscb)->target_channel_lun >> 3) & 0x1), \ + (((scb->hscb)->target_channel_lun >> 4) & 0xf), \ + ((scb->hscb)->target_channel_lun & 0x07) + +#define CTL_OF_CMD(cmd) ((cmd->device->channel) & 0x01), \ + ((cmd->device->id) & 0x0f), \ + ((cmd->device->lun) & 0x07) + +#define TARGET_INDEX(cmd) ((cmd)->device->id | ((cmd)->device->channel << 3)) + +/* + * A nice little define to make doing our printks a little easier + */ + +#define WARN_LEAD KERN_WARNING "(scsi%d:%d:%d:%d) " +#define INFO_LEAD KERN_INFO "(scsi%d:%d:%d:%d) " + +/* + * XXX - these options apply unilaterally to _all_ 274x/284x/294x + * cards in the system. This should be fixed. Exceptions to this + * rule are noted in the comments. + */ + +/* + * Use this as the default queue depth when setting tagged queueing on. + */ +static unsigned int aic7xxx_default_queue_depth = AIC7XXX_CMDS_PER_DEVICE; + +/* + * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This + * has no effect on any later resets that might occur due to things like + * SCSI bus timeouts. + */ +static unsigned int aic7xxx_no_reset = 0; +/* + * Certain PCI motherboards will scan PCI devices from highest to lowest, + * others scan from lowest to highest, and they tend to do all kinds of + * strange things when they come into contact with PCI bridge chips. The + * net result of all this is that the PCI card that is actually used to boot + * the machine is very hard to detect. Most motherboards go from lowest + * PCI slot number to highest, and the first SCSI controller found is the + * one you boot from. The only exceptions to this are when a controller + * has its BIOS disabled. So, we by default sort all of our SCSI controllers + * from lowest PCI slot number to highest PCI slot number. We also force + * all controllers with their BIOS disabled to the end of the list. This + * works on *almost* all computers. Where it doesn't work, we have this + * option. Setting this option to non-0 will reverse the order of the sort + * to highest first, then lowest, but will still leave cards with their BIOS + * disabled at the very end. That should fix everyone up unless there are + * really strange cirumstances. + */ +static int aic7xxx_reverse_scan = 0; +/* + * Should we force EXTENDED translation on a controller. + * 0 == Use whatever is in the SEEPROM or default to off + * 1 == Use whatever is in the SEEPROM or default to on + */ +static unsigned int aic7xxx_extended = 0; +/* + * The IRQ trigger method used on EISA controllers. Does not effect PCI cards. + * -1 = Use detected settings. + * 0 = Force Edge triggered mode. + * 1 = Force Level triggered mode. + */ +static int aic7xxx_irq_trigger = -1; +/* + * This variable is used to override the termination settings on a controller. + * This should not be used under normal conditions. However, in the case + * that a controller does not have a readable SEEPROM (so that we can't + * read the SEEPROM settings directly) and that a controller has a buggered + * version of the cable detection logic, this can be used to force the + * correct termination. It is preferable to use the manual termination + * settings in the BIOS if possible, but some motherboard controllers store + * those settings in a format we can't read. In other cases, auto term + * should also work, but the chipset was put together with no auto term + * logic (common on motherboard controllers). In those cases, we have + * 32 bits here to work with. That's good for 8 controllers/channels. The + * bits are organized as 4 bits per channel, with scsi0 getting the lowest + * 4 bits in the int. A 1 in a bit position indicates the termination setting + * that corresponds to that bit should be enabled, a 0 is disabled. + * It looks something like this: + * + * 0x0f = 1111-Single Ended Low Byte Termination on/off + * ||\-Single Ended High Byte Termination on/off + * |\-LVD Low Byte Termination on/off + * \-LVD High Byte Termination on/off + * + * For non-Ultra2 controllers, the upper 2 bits are not important. So, to + * enable both high byte and low byte termination on scsi0, I would need to + * make sure that the override_term variable was set to 0x03 (bits 0011). + * To make sure that all termination is enabled on an Ultra2 controller at + * scsi2 and only high byte termination on scsi1 and high and low byte + * termination on scsi0, I would set override_term=0xf23 (bits 1111 0010 0011) + * + * For the most part, users should never have to use this, that's why I + * left it fairly cryptic instead of easy to understand. If you need it, + * most likely someone will be telling you what your's needs to be set to. + */ +static int aic7xxx_override_term = -1; +/* + * Certain motherboard chipset controllers tend to screw + * up the polarity of the term enable output pin. Use this variable + * to force the correct polarity for your system. This is a bitfield variable + * similar to the previous one, but this one has one bit per channel instead + * of four. + * 0 = Force the setting to active low. + * 1 = Force setting to active high. + * Most Adaptec cards are active high, several motherboards are active low. + * To force a 2940 card at SCSI 0 to active high and a motherboard 7895 + * controller at scsi1 and scsi2 to active low, and a 2910 card at scsi3 + * to active high, you would need to set stpwlev=0x9 (bits 1001). + * + * People shouldn't need to use this, but if you are experiencing lots of + * SCSI timeout problems, this may help. There is one sure way to test what + * this option needs to be. Using a boot floppy to boot the system, configure + * your system to enable all SCSI termination (in the Adaptec SCSI BIOS) and + * if needed then also pass a value to override_term to make sure that the + * driver is enabling SCSI termination, then set this variable to either 0 + * or 1. When the driver boots, make sure there are *NO* SCSI cables + * connected to your controller. If it finds and inits the controller + * without problem, then the setting you passed to stpwlev was correct. If + * the driver goes into a reset loop and hangs the system, then you need the + * other setting for this variable. If neither setting lets the machine + * boot then you have definite termination problems that may not be fixable. + */ +static int aic7xxx_stpwlev = -1; +/* + * Set this to non-0 in order to force the driver to panic the kernel + * and print out debugging info on a SCSI abort or reset cycle. + */ +static int aic7xxx_panic_on_abort = 0; +/* + * PCI bus parity checking of the Adaptec controllers. This is somewhat + * dubious at best. To my knowledge, this option has never actually + * solved a PCI parity problem, but on certain machines with broken PCI + * chipset configurations, it can generate tons of false error messages. + * It's included in the driver for completeness. + * 0 = Shut off PCI parity check + * -1 = Normal polarity pci parity checking + * 1 = reverse polarity pci parity checking + * + * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this + * variable to -1 you would actually want to simply pass the variable + * name without a number. That will invert the 0 which will result in + * -1. + */ +static int aic7xxx_pci_parity = 0; +/* + * Set this to any non-0 value to cause us to dump the contents of all + * the card's registers in a hex dump format tailored to each model of + * controller. + * + * NOTE: THE CONTROLLER IS LEFT IN AN UNUSEABLE STATE BY THIS OPTION. + * YOU CANNOT BOOT UP WITH THIS OPTION, IT IS FOR DEBUGGING PURPOSES + * ONLY + */ +static int aic7xxx_dump_card = 0; +/* + * Set this to a non-0 value to make us dump out the 32 bit instruction + * registers on the card after completing the sequencer download. This + * allows the actual sequencer download to be verified. It is possible + * to use this option and still boot up and run your system. This is + * only intended for debugging purposes. + */ +static int aic7xxx_dump_sequencer = 0; +/* + * Certain newer motherboards have put new PCI based devices into the + * IO spaces that used to typically be occupied by VLB or EISA cards. + * This overlap can cause these newer motherboards to lock up when scanned + * for older EISA and VLB devices. Setting this option to non-0 will + * cause the driver to skip scanning for any VLB or EISA controllers and + * only support the PCI controllers. NOTE: this means that if the kernel + * os compiled with PCI support disabled, then setting this to non-0 + * would result in never finding any devices :) + */ +static int aic7xxx_no_probe = 0; +/* + * On some machines, enabling the external SCB RAM isn't reliable yet. I + * haven't had time to make test patches for things like changing the + * timing mode on that external RAM either. Some of those changes may + * fix the problem. Until then though, we default to external SCB RAM + * off and give a command line option to enable it. + */ +static int aic7xxx_scbram = 0; +/* + * So that we can set how long each device is given as a selection timeout. + * The table of values goes like this: + * 0 - 256ms + * 1 - 128ms + * 2 - 64ms + * 3 - 32ms + * We default to 64ms because it's fast. Some old SCSI-I devices need a + * longer time. The final value has to be left shifted by 3, hence 0x10 + * is the final value. + */ +static int aic7xxx_seltime = 0x10; +/* + * So that insmod can find the variable and make it point to something + */ +#ifdef MODULE +static char * aic7xxx = NULL; +module_param(aic7xxx, charp, 0); +#endif + +#define VERBOSE_NORMAL 0x0000 +#define VERBOSE_NEGOTIATION 0x0001 +#define VERBOSE_SEQINT 0x0002 +#define VERBOSE_SCSIINT 0x0004 +#define VERBOSE_PROBE 0x0008 +#define VERBOSE_PROBE2 0x0010 +#define VERBOSE_NEGOTIATION2 0x0020 +#define VERBOSE_MINOR_ERROR 0x0040 +#define VERBOSE_TRACING 0x0080 +#define VERBOSE_ABORT 0x0f00 +#define VERBOSE_ABORT_MID 0x0100 +#define VERBOSE_ABORT_FIND 0x0200 +#define VERBOSE_ABORT_PROCESS 0x0400 +#define VERBOSE_ABORT_RETURN 0x0800 +#define VERBOSE_RESET 0xf000 +#define VERBOSE_RESET_MID 0x1000 +#define VERBOSE_RESET_FIND 0x2000 +#define VERBOSE_RESET_PROCESS 0x4000 +#define VERBOSE_RESET_RETURN 0x8000 +static int aic7xxx_verbose = VERBOSE_NORMAL | VERBOSE_NEGOTIATION | + VERBOSE_PROBE; /* verbose messages */ + + +/**************************************************************************** + * + * We're going to start putting in function declarations so that order of + * functions is no longer important. As needed, they are added here. + * + ***************************************************************************/ + +static int aic7xxx_release(struct Scsi_Host *host); +static void aic7xxx_set_syncrate(struct aic7xxx_host *p, + struct aic7xxx_syncrate *syncrate, int target, int channel, + unsigned int period, unsigned int offset, unsigned char options, + unsigned int type, struct aic_dev_data *aic_dev); +static void aic7xxx_set_width(struct aic7xxx_host *p, int target, int channel, + int lun, unsigned int width, unsigned int type, + struct aic_dev_data *aic_dev); +static void aic7xxx_panic_abort(struct aic7xxx_host *p, Scsi_Cmnd *cmd); +static void aic7xxx_print_card(struct aic7xxx_host *p); +static void aic7xxx_print_scratch_ram(struct aic7xxx_host *p); +static void aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded); +#ifdef AIC7XXX_VERBOSE_DEBUGGING +static void aic7xxx_check_scbs(struct aic7xxx_host *p, char *buffer); +#endif + +/**************************************************************************** + * + * These functions are now used. They happen to be wrapped in useless + * inb/outb port read/writes around the real reads and writes because it + * seems that certain very fast CPUs have a problem dealing with us when + * going at full speed. + * + ***************************************************************************/ + +static inline unsigned char +aic_inb(struct aic7xxx_host *p, long port) +{ +#ifdef MMAPIO + unsigned char x; + if(p->maddr) + { + x = readb(p->maddr + port); + } + else + { + x = inb(p->base + port); + } + return(x); +#else + return(inb(p->base + port)); +#endif +} + +static inline void +aic_outb(struct aic7xxx_host *p, unsigned char val, long port) +{ +#ifdef MMAPIO + if(p->maddr) + { + writeb(val, p->maddr + port); + mb(); /* locked operation in order to force CPU ordering */ + readb(p->maddr + HCNTRL); /* dummy read to flush the PCI write */ + } + else + { + outb(val, p->base + port); + mb(); /* locked operation in order to force CPU ordering */ + } +#else + outb(val, p->base + port); + mb(); /* locked operation in order to force CPU ordering */ +#endif +} + +/*+F************************************************************************* + * Function: + * aic7xxx_setup + * + * Description: + * Handle Linux boot parameters. This routine allows for assigning a value + * to a parameter with a ':' between the parameter and the value. + * ie. aic7xxx=unpause:0x0A,extended + *-F*************************************************************************/ +static int +aic7xxx_setup(char *s) +{ + int i, n; + char *p; + char *end; + + static struct { + const char *name; + unsigned int *flag; + } options[] = { + { "extended", &aic7xxx_extended }, + { "no_reset", &aic7xxx_no_reset }, + { "irq_trigger", &aic7xxx_irq_trigger }, + { "verbose", &aic7xxx_verbose }, + { "reverse_scan",&aic7xxx_reverse_scan }, + { "override_term", &aic7xxx_override_term }, + { "stpwlev", &aic7xxx_stpwlev }, + { "no_probe", &aic7xxx_no_probe }, + { "panic_on_abort", &aic7xxx_panic_on_abort }, + { "pci_parity", &aic7xxx_pci_parity }, + { "dump_card", &aic7xxx_dump_card }, + { "dump_sequencer", &aic7xxx_dump_sequencer }, + { "default_queue_depth", &aic7xxx_default_queue_depth }, + { "scbram", &aic7xxx_scbram }, + { "seltime", &aic7xxx_seltime }, + { "tag_info", NULL } + }; + + end = strchr(s, '\0'); + + while ((p = strsep(&s, ",.")) != NULL) + { + for (i = 0; i < ARRAY_SIZE(options); i++) + { + n = strlen(options[i].name); + if (!strncmp(options[i].name, p, n)) + { + if (!strncmp(p, "tag_info", n)) + { + if (p[n] == ':') + { + char *base; + char *tok, *tok_end, *tok_end2; + char tok_list[] = { '.', ',', '{', '}', '\0' }; + int i, instance = -1, device = -1; + unsigned char done = FALSE; + + base = p; + tok = base + n + 1; /* Forward us just past the ':' */ + tok_end = strchr(tok, '\0'); + if (tok_end < end) + *tok_end = ','; + while(!done) + { + switch(*tok) + { + case '{': + if (instance == -1) + instance = 0; + else if (device == -1) + device = 0; + tok++; + break; + case '}': + if (device != -1) + device = -1; + else if (instance != -1) + instance = -1; + tok++; + break; + case ',': + case '.': + if (instance == -1) + done = TRUE; + else if (device >= 0) + device++; + else if (instance >= 0) + instance++; + if ( (device >= MAX_TARGETS) || + (instance >= ARRAY_SIZE(aic7xxx_tag_info)) ) + done = TRUE; + tok++; + if (!done) + { + base = tok; + } + break; + case '\0': + done = TRUE; + break; + default: + done = TRUE; + tok_end = strchr(tok, '\0'); + for(i=0; tok_list[i]; i++) + { + tok_end2 = strchr(tok, tok_list[i]); + if ( (tok_end2) && (tok_end2 < tok_end) ) + { + tok_end = tok_end2; + done = FALSE; + } + } + if ( (instance >= 0) && (device >= 0) && + (instance < ARRAY_SIZE(aic7xxx_tag_info)) && + (device < MAX_TARGETS) ) + aic7xxx_tag_info[instance].tag_commands[device] = + simple_strtoul(tok, NULL, 0) & 0xff; + tok = tok_end; + break; + } + } + while((p != base) && (p != NULL)) + p = strsep(&s, ",."); + } + } + else if (p[n] == ':') + { + *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); + if(!strncmp(p, "seltime", n)) + { + *(options[i].flag) = (*(options[i].flag) % 4) << 3; + } + } + else if (!strncmp(p, "verbose", n)) + { + *(options[i].flag) = 0xff29; + } + else + { + *(options[i].flag) = ~(*(options[i].flag)); + if(!strncmp(p, "seltime", n)) + { + *(options[i].flag) = (*(options[i].flag) % 4) << 3; + } + } + } + } + } + return 1; +} + +__setup("aic7xxx=", aic7xxx_setup); + +/*+F************************************************************************* + * Function: + * pause_sequencer + * + * Description: + * Pause the sequencer and wait for it to actually stop - this + * is important since the sequencer can disable pausing for critical + * sections. + *-F*************************************************************************/ +static void +pause_sequencer(struct aic7xxx_host *p) +{ + aic_outb(p, p->pause, HCNTRL); + while ((aic_inb(p, HCNTRL) & PAUSE) == 0) + { + ; + } + if(p->features & AHC_ULTRA2) + { + aic_inb(p, CCSCBCTL); + } +} + +/*+F************************************************************************* + * Function: + * unpause_sequencer + * + * Description: + * Unpause the sequencer. Unremarkable, yet done often enough to + * warrant an easy way to do it. + *-F*************************************************************************/ +static void +unpause_sequencer(struct aic7xxx_host *p, int unpause_always) +{ + if (unpause_always || + ( !(aic_inb(p, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) && + !(p->flags & AHC_HANDLING_REQINITS) ) ) + { + aic_outb(p, p->unpause, HCNTRL); + } +} + +/*+F************************************************************************* + * Function: + * restart_sequencer + * + * Description: + * Restart the sequencer program from address zero. This assumes + * that the sequencer is already paused. + *-F*************************************************************************/ +static void +restart_sequencer(struct aic7xxx_host *p) +{ + aic_outb(p, 0, SEQADDR0); + aic_outb(p, 0, SEQADDR1); + aic_outb(p, FASTMODE, SEQCTL); +} + +/* + * We include the aic7xxx_seq.c file here so that the other defines have + * already been made, and so that it comes before the code that actually + * downloads the instructions (since we don't typically use function + * prototype, our code has to be ordered that way, it's a left-over from + * the original driver days.....I should fix it some time DL). + */ +#include "aic7xxx_old/aic7xxx_seq.c" + +/*+F************************************************************************* + * Function: + * aic7xxx_check_patch + * + * Description: + * See if the next patch to download should be downloaded. + *-F*************************************************************************/ +static int +aic7xxx_check_patch(struct aic7xxx_host *p, + struct sequencer_patch **start_patch, int start_instr, int *skip_addr) +{ + struct sequencer_patch *cur_patch; + struct sequencer_patch *last_patch; + int num_patches; + + num_patches = sizeof(sequencer_patches)/sizeof(struct sequencer_patch); + last_patch = &sequencer_patches[num_patches]; + cur_patch = *start_patch; + + while ((cur_patch < last_patch) && (start_instr == cur_patch->begin)) + { + if (cur_patch->patch_func(p) == 0) + { + /* + * Start rejecting code. + */ + *skip_addr = start_instr + cur_patch->skip_instr; + cur_patch += cur_patch->skip_patch; + } + else + { + /* + * Found an OK patch. Advance the patch pointer to the next patch + * and wait for our instruction pointer to get here. + */ + cur_patch++; + } + } + + *start_patch = cur_patch; + if (start_instr < *skip_addr) + /* + * Still skipping + */ + return (0); + return(1); +} + + +/*+F************************************************************************* + * Function: + * aic7xxx_download_instr + * + * Description: + * Find the next patch to download. + *-F*************************************************************************/ +static void +aic7xxx_download_instr(struct aic7xxx_host *p, int instrptr, + unsigned char *dconsts) +{ + union ins_formats instr; + struct ins_format1 *fmt1_ins; + struct ins_format3 *fmt3_ins; + unsigned char opcode; + + instr = *(union ins_formats*) &seqprog[instrptr * 4]; + + instr.integer = le32_to_cpu(instr.integer); + + fmt1_ins = &instr.format1; + fmt3_ins = NULL; + + /* Pull the opcode */ + opcode = instr.format1.opcode; + switch (opcode) + { + case AIC_OP_JMP: + case AIC_OP_JC: + case AIC_OP_JNC: + case AIC_OP_CALL: + case AIC_OP_JNE: + case AIC_OP_JNZ: + case AIC_OP_JE: + case AIC_OP_JZ: + { + struct sequencer_patch *cur_patch; + int address_offset; + unsigned int address; + int skip_addr; + int i; + + fmt3_ins = &instr.format3; + address_offset = 0; + address = fmt3_ins->address; + cur_patch = sequencer_patches; + skip_addr = 0; + + for (i = 0; i < address;) + { + aic7xxx_check_patch(p, &cur_patch, i, &skip_addr); + if (skip_addr > i) + { + int end_addr; + + end_addr = min_t(int, address, skip_addr); + address_offset += end_addr - i; + i = skip_addr; + } + else + { + i++; + } + } + address -= address_offset; + fmt3_ins->address = address; + /* Fall Through to the next code section */ + } + case AIC_OP_OR: + case AIC_OP_AND: + case AIC_OP_XOR: + case AIC_OP_ADD: + case AIC_OP_ADC: + case AIC_OP_BMOV: + if (fmt1_ins->parity != 0) + { + fmt1_ins->immediate = dconsts[fmt1_ins->immediate]; + } + fmt1_ins->parity = 0; + /* Fall Through to the next code section */ + case AIC_OP_ROL: + if ((p->features & AHC_ULTRA2) != 0) + { + int i, count; + + /* Calculate odd parity for the instruction */ + for ( i=0, count=0; i < 31; i++) + { + unsigned int mask; + + mask = 0x01 << i; + if ((instr.integer & mask) != 0) + count++; + } + if (!(count & 0x01)) + instr.format1.parity = 1; + } + else + { + if (fmt3_ins != NULL) + { + instr.integer = fmt3_ins->immediate | + (fmt3_ins->source << 8) | + (fmt3_ins->address << 16) | + (fmt3_ins->opcode << 25); + } + else + { + instr.integer = fmt1_ins->immediate | + (fmt1_ins->source << 8) | + (fmt1_ins->destination << 16) | + (fmt1_ins->ret << 24) | + (fmt1_ins->opcode << 25); + } + } + aic_outb(p, (instr.integer & 0xff), SEQRAM); + aic_outb(p, ((instr.integer >> 8) & 0xff), SEQRAM); + aic_outb(p, ((instr.integer >> 16) & 0xff), SEQRAM); + aic_outb(p, ((instr.integer >> 24) & 0xff), SEQRAM); + udelay(10); + break; + + default: + panic("aic7xxx: Unknown opcode encountered in sequencer program."); + break; + } +} + + +/*+F************************************************************************* + * Function: + * aic7xxx_loadseq + * + * Description: + * Load the sequencer code into the controller memory. + *-F*************************************************************************/ +static void +aic7xxx_loadseq(struct aic7xxx_host *p) +{ + struct sequencer_patch *cur_patch; + int i; + int downloaded; + int skip_addr; + unsigned char download_consts[4] = {0, 0, 0, 0}; + + if (aic7xxx_verbose & VERBOSE_PROBE) + { + printk(KERN_INFO "(scsi%d) Downloading sequencer code...", p->host_no); + } +#if 0 + download_consts[TMODE_NUMCMDS] = p->num_targetcmds; +#endif + download_consts[TMODE_NUMCMDS] = 0; + cur_patch = &sequencer_patches[0]; + downloaded = 0; + skip_addr = 0; + + aic_outb(p, PERRORDIS|LOADRAM|FAILDIS|FASTMODE, SEQCTL); + aic_outb(p, 0, SEQADDR0); + aic_outb(p, 0, SEQADDR1); + + for (i = 0; i < sizeof(seqprog) / 4; i++) + { + if (aic7xxx_check_patch(p, &cur_patch, i, &skip_addr) == 0) + { + /* Skip this instruction for this configuration. */ + continue; + } + aic7xxx_download_instr(p, i, &download_consts[0]); + downloaded++; + } + + aic_outb(p, 0, SEQADDR0); + aic_outb(p, 0, SEQADDR1); + aic_outb(p, FASTMODE | FAILDIS, SEQCTL); + unpause_sequencer(p, TRUE); + mdelay(1); + pause_sequencer(p); + aic_outb(p, FASTMODE, SEQCTL); + if (aic7xxx_verbose & VERBOSE_PROBE) + { + printk(" %d instructions downloaded\n", downloaded); + } + if (aic7xxx_dump_sequencer) + aic7xxx_print_sequencer(p, downloaded); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_print_sequencer + * + * Description: + * Print the contents of the sequencer memory to the screen. + *-F*************************************************************************/ +static void +aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded) +{ + int i, k, temp; + + aic_outb(p, PERRORDIS|LOADRAM|FAILDIS|FASTMODE, SEQCTL); + aic_outb(p, 0, SEQADDR0); + aic_outb(p, 0, SEQADDR1); + + k = 0; + for (i=0; i < downloaded; i++) + { + if ( k == 0 ) + printk("%03x: ", i); + temp = aic_inb(p, SEQRAM); + temp |= (aic_inb(p, SEQRAM) << 8); + temp |= (aic_inb(p, SEQRAM) << 16); + temp |= (aic_inb(p, SEQRAM) << 24); + printk("%08x", temp); + if ( ++k == 8 ) + { + printk("\n"); + k = 0; + } + else + printk(" "); + } + aic_outb(p, 0, SEQADDR0); + aic_outb(p, 0, SEQADDR1); + aic_outb(p, FASTMODE | FAILDIS, SEQCTL); + unpause_sequencer(p, TRUE); + mdelay(1); + pause_sequencer(p); + aic_outb(p, FASTMODE, SEQCTL); + printk("\n"); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_info + * + * Description: + * Return a string describing the driver. + *-F*************************************************************************/ +static const char * +aic7xxx_info(struct Scsi_Host *dooh) +{ + static char buffer[256]; + char *bp; + struct aic7xxx_host *p; + + bp = &buffer[0]; + p = (struct aic7xxx_host *)dooh->hostdata; + memset(bp, 0, sizeof(buffer)); + strcpy(bp, "Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) "); + strcat(bp, AIC7XXX_C_VERSION); + strcat(bp, "/"); + strcat(bp, AIC7XXX_H_VERSION); + strcat(bp, "\n"); + strcat(bp, " <"); + strcat(bp, board_names[p->board_name_index]); + strcat(bp, ">"); + + return(bp); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_find_syncrate + * + * Description: + * Look up the valid period to SCSIRATE conversion in our table + *-F*************************************************************************/ +static struct aic7xxx_syncrate * +aic7xxx_find_syncrate(struct aic7xxx_host *p, unsigned int *period, + unsigned int maxsync, unsigned char *options) +{ + struct aic7xxx_syncrate *syncrate; + int done = FALSE; + + switch(*options) + { + case MSG_EXT_PPR_OPTION_DT_CRC: + case MSG_EXT_PPR_OPTION_DT_UNITS: + if(!(p->features & AHC_ULTRA3)) + { + *options = 0; + maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2); + } + break; + case MSG_EXT_PPR_OPTION_DT_CRC_QUICK: + case MSG_EXT_PPR_OPTION_DT_UNITS_QUICK: + if(!(p->features & AHC_ULTRA3)) + { + *options = 0; + maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2); + } + else + { + /* + * we don't support the Quick Arbitration variants of dual edge + * clocking. As it turns out, we want to send back the + * same basic option, but without the QA attribute. + * We know that we are responding because we would never set + * these options ourself, we would only respond to them. + */ + switch(*options) + { + case MSG_EXT_PPR_OPTION_DT_CRC_QUICK: + *options = MSG_EXT_PPR_OPTION_DT_CRC; + break; + case MSG_EXT_PPR_OPTION_DT_UNITS_QUICK: + *options = MSG_EXT_PPR_OPTION_DT_UNITS; + break; + } + } + break; + default: + *options = 0; + maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2); + break; + } + syncrate = &aic7xxx_syncrates[maxsync]; + while ( (syncrate->rate[0] != NULL) && + (!(p->features & AHC_ULTRA2) || syncrate->sxfr_ultra2) ) + { + if (*period <= syncrate->period) + { + switch(*options) + { + case MSG_EXT_PPR_OPTION_DT_CRC: + case MSG_EXT_PPR_OPTION_DT_UNITS: + if(!(syncrate->sxfr_ultra2 & AHC_SYNCRATE_CRC)) + { + done = TRUE; + /* + * oops, we went too low for the CRC/DualEdge signalling, so + * clear the options byte + */ + *options = 0; + /* + * We'll be sending a reply to this packet to set the options + * properly, so unilaterally set the period as well. + */ + *period = syncrate->period; + } + else + { + done = TRUE; + if(syncrate == &aic7xxx_syncrates[maxsync]) + { + *period = syncrate->period; + } + } + break; + default: + if(!(syncrate->sxfr_ultra2 & AHC_SYNCRATE_CRC)) + { + done = TRUE; + if(syncrate == &aic7xxx_syncrates[maxsync]) + { + *period = syncrate->period; + } + } + break; + } + if(done) + { + break; + } + } + syncrate++; + } + if ( (*period == 0) || (syncrate->rate[0] == NULL) || + ((p->features & AHC_ULTRA2) && (syncrate->sxfr_ultra2 == 0)) ) + { + /* + * Use async transfers for this target + */ + *options = 0; + *period = 255; + syncrate = NULL; + } + return (syncrate); +} + + +/*+F************************************************************************* + * Function: + * aic7xxx_find_period + * + * Description: + * Look up the valid SCSIRATE to period conversion in our table + *-F*************************************************************************/ +static unsigned int +aic7xxx_find_period(struct aic7xxx_host *p, unsigned int scsirate, + unsigned int maxsync) +{ + struct aic7xxx_syncrate *syncrate; + + if (p->features & AHC_ULTRA2) + { + scsirate &= SXFR_ULTRA2; + } + else + { + scsirate &= SXFR; + } + + syncrate = &aic7xxx_syncrates[maxsync]; + while (syncrate->rate[0] != NULL) + { + if (p->features & AHC_ULTRA2) + { + if (syncrate->sxfr_ultra2 == 0) + break; + else if (scsirate == syncrate->sxfr_ultra2) + return (syncrate->period); + else if (scsirate == (syncrate->sxfr_ultra2 & ~AHC_SYNCRATE_CRC)) + return (syncrate->period); + } + else if (scsirate == (syncrate->sxfr & ~ULTRA_SXFR)) + { + return (syncrate->period); + } + syncrate++; + } + return (0); /* async */ +} + +/*+F************************************************************************* + * Function: + * aic7xxx_validate_offset + * + * Description: + * Set a valid offset value for a particular card in use and transfer + * settings in use. + *-F*************************************************************************/ +static void +aic7xxx_validate_offset(struct aic7xxx_host *p, + struct aic7xxx_syncrate *syncrate, unsigned int *offset, int wide) +{ + unsigned int maxoffset; + + /* Limit offset to what the card (and device) can do */ + if (syncrate == NULL) + { + maxoffset = 0; + } + else if (p->features & AHC_ULTRA2) + { + maxoffset = MAX_OFFSET_ULTRA2; + } + else + { + if (wide) + maxoffset = MAX_OFFSET_16BIT; + else + maxoffset = MAX_OFFSET_8BIT; + } + *offset = min(*offset, maxoffset); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_set_syncrate + * + * Description: + * Set the actual syncrate down in the card and in our host structs + *-F*************************************************************************/ +static void +aic7xxx_set_syncrate(struct aic7xxx_host *p, struct aic7xxx_syncrate *syncrate, + int target, int channel, unsigned int period, unsigned int offset, + unsigned char options, unsigned int type, struct aic_dev_data *aic_dev) +{ + unsigned char tindex; + unsigned short target_mask; + unsigned char lun, old_options; + unsigned int old_period, old_offset; + + tindex = target | (channel << 3); + target_mask = 0x01 << tindex; + lun = aic_inb(p, SCB_TCL) & 0x07; + + if (syncrate == NULL) + { + period = 0; + offset = 0; + } + + old_period = aic_dev->cur.period; + old_offset = aic_dev->cur.offset; + old_options = aic_dev->cur.options; + + + if (type & AHC_TRANS_CUR) + { + unsigned int scsirate; + + scsirate = aic_inb(p, TARG_SCSIRATE + tindex); + if (p->features & AHC_ULTRA2) + { + scsirate &= ~SXFR_ULTRA2; + if (syncrate != NULL) + { + switch(options) + { + case MSG_EXT_PPR_OPTION_DT_UNITS: + /* + * mask off the CRC bit in the xfer settings + */ + scsirate |= (syncrate->sxfr_ultra2 & ~AHC_SYNCRATE_CRC); + break; + default: + scsirate |= syncrate->sxfr_ultra2; + break; + } + } + if (type & AHC_TRANS_ACTIVE) + { + aic_outb(p, offset, SCSIOFFSET); + } + aic_outb(p, offset, TARG_OFFSET + tindex); + } + else /* Not an Ultra2 controller */ + { + scsirate &= ~(SXFR|SOFS); + p->ultraenb &= ~target_mask; + if (syncrate != NULL) + { + if (syncrate->sxfr & ULTRA_SXFR) + { + p->ultraenb |= target_mask; + } + scsirate |= (syncrate->sxfr & SXFR); + scsirate |= (offset & SOFS); + } + if (type & AHC_TRANS_ACTIVE) + { + unsigned char sxfrctl0; + + sxfrctl0 = aic_inb(p, SXFRCTL0); + sxfrctl0 &= ~FAST20; + if (p->ultraenb & target_mask) + sxfrctl0 |= FAST20; + aic_outb(p, sxfrctl0, SXFRCTL0); + } + aic_outb(p, p->ultraenb & 0xff, ULTRA_ENB); + aic_outb(p, (p->ultraenb >> 8) & 0xff, ULTRA_ENB + 1 ); + } + if (type & AHC_TRANS_ACTIVE) + { + aic_outb(p, scsirate, SCSIRATE); + } + aic_outb(p, scsirate, TARG_SCSIRATE + tindex); + aic_dev->cur.period = period; + aic_dev->cur.offset = offset; + aic_dev->cur.options = options; + if ( !(type & AHC_TRANS_QUITE) && + (aic7xxx_verbose & VERBOSE_NEGOTIATION) && + (aic_dev->flags & DEVICE_PRINT_DTR) ) + { + if (offset) + { + int rate_mod = (scsirate & WIDEXFER) ? 1 : 0; + + printk(INFO_LEAD "Synchronous at %s Mbyte/sec, " + "offset %d.\n", p->host_no, channel, target, lun, + syncrate->rate[rate_mod], offset); + } + else + { + printk(INFO_LEAD "Using asynchronous transfers.\n", + p->host_no, channel, target, lun); + } + aic_dev->flags &= ~DEVICE_PRINT_DTR; + } + } + + if (type & AHC_TRANS_GOAL) + { + aic_dev->goal.period = period; + aic_dev->goal.offset = offset; + aic_dev->goal.options = options; + } + + if (type & AHC_TRANS_USER) + { + p->user[tindex].period = period; + p->user[tindex].offset = offset; + p->user[tindex].options = options; + } +} + +/*+F************************************************************************* + * Function: + * aic7xxx_set_width + * + * Description: + * Set the actual width down in the card and in our host structs + *-F*************************************************************************/ +static void +aic7xxx_set_width(struct aic7xxx_host *p, int target, int channel, int lun, + unsigned int width, unsigned int type, struct aic_dev_data *aic_dev) +{ + unsigned char tindex; + unsigned short target_mask; + unsigned int old_width; + + tindex = target | (channel << 3); + target_mask = 1 << tindex; + + old_width = aic_dev->cur.width; + + if (type & AHC_TRANS_CUR) + { + unsigned char scsirate; + + scsirate = aic_inb(p, TARG_SCSIRATE + tindex); + + scsirate &= ~WIDEXFER; + if (width == MSG_EXT_WDTR_BUS_16_BIT) + scsirate |= WIDEXFER; + + aic_outb(p, scsirate, TARG_SCSIRATE + tindex); + + if (type & AHC_TRANS_ACTIVE) + aic_outb(p, scsirate, SCSIRATE); + + aic_dev->cur.width = width; + + if ( !(type & AHC_TRANS_QUITE) && + (aic7xxx_verbose & VERBOSE_NEGOTIATION2) && + (aic_dev->flags & DEVICE_PRINT_DTR) ) + { + printk(INFO_LEAD "Using %s transfers\n", p->host_no, channel, target, + lun, (scsirate & WIDEXFER) ? "Wide(16bit)" : "Narrow(8bit)" ); + } + } + + if (type & AHC_TRANS_GOAL) + aic_dev->goal.width = width; + if (type & AHC_TRANS_USER) + p->user[tindex].width = width; + + if (aic_dev->goal.offset) + { + if (p->features & AHC_ULTRA2) + { + aic_dev->goal.offset = MAX_OFFSET_ULTRA2; + } + else if (width == MSG_EXT_WDTR_BUS_16_BIT) + { + aic_dev->goal.offset = MAX_OFFSET_16BIT; + } + else + { + aic_dev->goal.offset = MAX_OFFSET_8BIT; + } + } +} + +/*+F************************************************************************* + * Function: + * scbq_init + * + * Description: + * SCB queue initialization. + * + *-F*************************************************************************/ +static void +scbq_init(volatile scb_queue_type *queue) +{ + queue->head = NULL; + queue->tail = NULL; +} + +/*+F************************************************************************* + * Function: + * scbq_insert_head + * + * Description: + * Add an SCB to the head of the list. + * + *-F*************************************************************************/ +static inline void +scbq_insert_head(volatile scb_queue_type *queue, struct aic7xxx_scb *scb) +{ + scb->q_next = queue->head; + queue->head = scb; + if (queue->tail == NULL) /* If list was empty, update tail. */ + queue->tail = queue->head; +} + +/*+F************************************************************************* + * Function: + * scbq_remove_head + * + * Description: + * Remove an SCB from the head of the list. + * + *-F*************************************************************************/ +static inline struct aic7xxx_scb * +scbq_remove_head(volatile scb_queue_type *queue) +{ + struct aic7xxx_scb * scbp; + + scbp = queue->head; + if (queue->head != NULL) + queue->head = queue->head->q_next; + if (queue->head == NULL) /* If list is now empty, update tail. */ + queue->tail = NULL; + return(scbp); +} + +/*+F************************************************************************* + * Function: + * scbq_remove + * + * Description: + * Removes an SCB from the list. + * + *-F*************************************************************************/ +static inline void +scbq_remove(volatile scb_queue_type *queue, struct aic7xxx_scb *scb) +{ + if (queue->head == scb) + { + /* At beginning of queue, remove from head. */ + scbq_remove_head(queue); + } + else + { + struct aic7xxx_scb *curscb = queue->head; + + /* + * Search until the next scb is the one we're looking for, or + * we run out of queue. + */ + while ((curscb != NULL) && (curscb->q_next != scb)) + { + curscb = curscb->q_next; + } + if (curscb != NULL) + { + /* Found it. */ + curscb->q_next = scb->q_next; + if (scb->q_next == NULL) + { + /* Update the tail when removing the tail. */ + queue->tail = curscb; + } + } + } +} + +/*+F************************************************************************* + * Function: + * scbq_insert_tail + * + * Description: + * Add an SCB at the tail of the list. + * + *-F*************************************************************************/ +static inline void +scbq_insert_tail(volatile scb_queue_type *queue, struct aic7xxx_scb *scb) +{ + scb->q_next = NULL; + if (queue->tail != NULL) /* Add the scb at the end of the list. */ + queue->tail->q_next = scb; + queue->tail = scb; /* Update the tail. */ + if (queue->head == NULL) /* If list was empty, update head. */ + queue->head = queue->tail; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_match_scb + * + * Description: + * Checks to see if an scb matches the target/channel as specified. + * If target is ALL_TARGETS (-1), then we're looking for any device + * on the specified channel; this happens when a channel is going + * to be reset and all devices on that channel must be aborted. + *-F*************************************************************************/ +static int +aic7xxx_match_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb, + int target, int channel, int lun, unsigned char tag) +{ + int targ = (scb->hscb->target_channel_lun >> 4) & 0x0F; + int chan = (scb->hscb->target_channel_lun >> 3) & 0x01; + int slun = scb->hscb->target_channel_lun & 0x07; + int match; + + match = ((chan == channel) || (channel == ALL_CHANNELS)); + if (match != 0) + match = ((targ == target) || (target == ALL_TARGETS)); + if (match != 0) + match = ((lun == slun) || (lun == ALL_LUNS)); + if (match != 0) + match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL)); + + return (match); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_add_curscb_to_free_list + * + * Description: + * Adds the current scb (in SCBPTR) to the list of free SCBs. + *-F*************************************************************************/ +static void +aic7xxx_add_curscb_to_free_list(struct aic7xxx_host *p) +{ + /* + * Invalidate the tag so that aic7xxx_find_scb doesn't think + * it's active + */ + aic_outb(p, SCB_LIST_NULL, SCB_TAG); + aic_outb(p, 0, SCB_CONTROL); + + aic_outb(p, aic_inb(p, FREE_SCBH), SCB_NEXT); + aic_outb(p, aic_inb(p, SCBPTR), FREE_SCBH); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_rem_scb_from_disc_list + * + * Description: + * Removes the current SCB from the disconnected list and adds it + * to the free list. + *-F*************************************************************************/ +static unsigned char +aic7xxx_rem_scb_from_disc_list(struct aic7xxx_host *p, unsigned char scbptr, + unsigned char prev) +{ + unsigned char next; + + aic_outb(p, scbptr, SCBPTR); + next = aic_inb(p, SCB_NEXT); + aic7xxx_add_curscb_to_free_list(p); + + if (prev != SCB_LIST_NULL) + { + aic_outb(p, prev, SCBPTR); + aic_outb(p, next, SCB_NEXT); + } + else + { + aic_outb(p, next, DISCONNECTED_SCBH); + } + + return next; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_busy_target + * + * Description: + * Set the specified target busy. + *-F*************************************************************************/ +static inline void +aic7xxx_busy_target(struct aic7xxx_host *p, struct aic7xxx_scb *scb) +{ + p->untagged_scbs[scb->hscb->target_channel_lun] = scb->hscb->tag; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_index_busy_target + * + * Description: + * Returns the index of the busy target, and optionally sets the + * target inactive. + *-F*************************************************************************/ +static inline unsigned char +aic7xxx_index_busy_target(struct aic7xxx_host *p, unsigned char tcl, + int unbusy) +{ + unsigned char busy_scbid; + + busy_scbid = p->untagged_scbs[tcl]; + if (unbusy) + { + p->untagged_scbs[tcl] = SCB_LIST_NULL; + } + return (busy_scbid); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_find_scb + * + * Description: + * Look through the SCB array of the card and attempt to find the + * hardware SCB that corresponds to the passed in SCB. Return + * SCB_LIST_NULL if unsuccessful. This routine assumes that the + * card is already paused. + *-F*************************************************************************/ +static unsigned char +aic7xxx_find_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb) +{ + unsigned char saved_scbptr; + unsigned char curindex; + + saved_scbptr = aic_inb(p, SCBPTR); + curindex = 0; + for (curindex = 0; curindex < p->scb_data->maxhscbs; curindex++) + { + aic_outb(p, curindex, SCBPTR); + if (aic_inb(p, SCB_TAG) == scb->hscb->tag) + { + break; + } + } + aic_outb(p, saved_scbptr, SCBPTR); + if (curindex >= p->scb_data->maxhscbs) + { + curindex = SCB_LIST_NULL; + } + + return (curindex); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_allocate_scb + * + * Description: + * Get an SCB from the free list or by allocating a new one. + *-F*************************************************************************/ +static int +aic7xxx_allocate_scb(struct aic7xxx_host *p) +{ + struct aic7xxx_scb *scbp = NULL; + int scb_size = (sizeof (struct hw_scatterlist) * AIC7XXX_MAX_SG) + 12 + 6; + int i; + int step = PAGE_SIZE / 1024; + unsigned long scb_count = 0; + struct hw_scatterlist *hsgp; + struct aic7xxx_scb *scb_ap; + struct aic7xxx_scb_dma *scb_dma; + unsigned char *bufs; + + if (p->scb_data->numscbs < p->scb_data->maxscbs) + { + /* + * Calculate the optimal number of SCBs to allocate. + * + * NOTE: This formula works because the sizeof(sg_array) is always + * 1024. Therefore, scb_size * i would always be > PAGE_SIZE * + * (i/step). The (i-1) allows the left hand side of the equation + * to grow into the right hand side to a point of near perfect + * efficiency since scb_size * (i -1) is growing slightly faster + * than the right hand side. If the number of SG array elements + * is changed, this function may not be near so efficient any more. + * + * Since the DMA'able buffers are now allocated in a separate + * chunk this algorithm has been modified to match. The '12' + * and '6' factors in scb_size are for the DMA'able command byte + * and sensebuffers respectively. -DaveM + */ + for ( i=step;; i *= 2 ) + { + if ( (scb_size * (i-1)) >= ( (PAGE_SIZE * (i/step)) - 64 ) ) + { + i /= 2; + break; + } + } + scb_count = min( (i-1), p->scb_data->maxscbs - p->scb_data->numscbs); + scb_ap = (struct aic7xxx_scb *)kmalloc(sizeof (struct aic7xxx_scb) * scb_count + + sizeof(struct aic7xxx_scb_dma), GFP_ATOMIC); + if (scb_ap == NULL) + return(0); + scb_dma = (struct aic7xxx_scb_dma *)&scb_ap[scb_count]; + hsgp = (struct hw_scatterlist *) + pci_alloc_consistent(p->pdev, scb_size * scb_count, + &scb_dma->dma_address); + if (hsgp == NULL) + { + kfree(scb_ap); + return(0); + } + bufs = (unsigned char *)&hsgp[scb_count * AIC7XXX_MAX_SG]; +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (aic7xxx_verbose > 0xffff) + { + if (p->scb_data->numscbs == 0) + printk(INFO_LEAD "Allocating initial %ld SCB structures.\n", + p->host_no, -1, -1, -1, scb_count); + else + printk(INFO_LEAD "Allocating %ld additional SCB structures.\n", + p->host_no, -1, -1, -1, scb_count); + } +#endif + memset(scb_ap, 0, sizeof (struct aic7xxx_scb) * scb_count); + scb_dma->dma_offset = (unsigned long)scb_dma->dma_address + - (unsigned long)hsgp; + scb_dma->dma_len = scb_size * scb_count; + for (i=0; i < scb_count; i++) + { + scbp = &scb_ap[i]; + scbp->hscb = &p->scb_data->hscbs[p->scb_data->numscbs]; + scbp->sg_list = &hsgp[i * AIC7XXX_MAX_SG]; + scbp->sense_cmd = bufs; + scbp->cmnd = bufs + 6; + bufs += 12 + 6; + scbp->scb_dma = scb_dma; + memset(scbp->hscb, 0, sizeof(struct aic7xxx_hwscb)); + scbp->hscb->tag = p->scb_data->numscbs; + /* + * Place in the scb array; never is removed + */ + p->scb_data->scb_array[p->scb_data->numscbs++] = scbp; + scbq_insert_tail(&p->scb_data->free_scbs, scbp); + } + scbp->kmalloc_ptr = scb_ap; + } + return(scb_count); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_queue_cmd_complete + * + * Description: + * Due to race conditions present in the SCSI subsystem, it is easier + * to queue completed commands, then call scsi_done() on them when + * we're finished. This function queues the completed commands. + *-F*************************************************************************/ +static void +aic7xxx_queue_cmd_complete(struct aic7xxx_host *p, Scsi_Cmnd *cmd) +{ + aic7xxx_position(cmd) = SCB_LIST_NULL; + cmd->host_scribble = (char *)p->completeq.head; + p->completeq.head = cmd; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_done_cmds_complete + * + * Description: + * Process the completed command queue. + *-F*************************************************************************/ +static void +aic7xxx_done_cmds_complete(struct aic7xxx_host *p) +{ + Scsi_Cmnd *cmd; + + while (p->completeq.head != NULL) + { + cmd = p->completeq.head; + p->completeq.head = (Scsi_Cmnd *)cmd->host_scribble; + cmd->host_scribble = NULL; + cmd->scsi_done(cmd); + } +} + +/*+F************************************************************************* + * Function: + * aic7xxx_free_scb + * + * Description: + * Free the scb and insert into the free scb list. + *-F*************************************************************************/ +static void +aic7xxx_free_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb) +{ + + scb->flags = SCB_FREE; + scb->cmd = NULL; + scb->sg_count = 0; + scb->sg_length = 0; + scb->tag_action = 0; + scb->hscb->control = 0; + scb->hscb->target_status = 0; + scb->hscb->target_channel_lun = SCB_LIST_NULL; + + scbq_insert_head(&p->scb_data->free_scbs, scb); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_done + * + * Description: + * Calls the higher level scsi done function and frees the scb. + *-F*************************************************************************/ +static void +aic7xxx_done(struct aic7xxx_host *p, struct aic7xxx_scb *scb) +{ + Scsi_Cmnd *cmd = scb->cmd; + struct aic_dev_data *aic_dev = cmd->device->hostdata; + int tindex = TARGET_INDEX(cmd); + struct aic7xxx_scb *scbp; + unsigned char queue_depth; + + if (cmd->use_sg > 1) + { + struct scatterlist *sg; + + sg = (struct scatterlist *)cmd->request_buffer; + pci_unmap_sg(p->pdev, sg, cmd->use_sg, scsi_to_pci_dma_dir(cmd->sc_data_direction)); + } + else if (cmd->request_bufflen) + pci_unmap_single(p->pdev, aic7xxx_mapping(cmd), + cmd->request_bufflen, + scsi_to_pci_dma_dir(cmd->sc_data_direction)); + if (scb->flags & SCB_SENSE) + { + pci_unmap_single(p->pdev, + le32_to_cpu(scb->sg_list[0].address), + sizeof(cmd->sense_buffer), + PCI_DMA_FROMDEVICE); + } + if (scb->flags & SCB_RECOVERY_SCB) + { + p->flags &= ~AHC_ABORT_PENDING; + } + if (scb->flags & (SCB_RESET|SCB_ABORT)) + { + cmd->result |= (DID_RESET << 16); + } + + if ((scb->flags & SCB_MSGOUT_BITS) != 0) + { + unsigned short mask; + int message_error = FALSE; + + mask = 0x01 << tindex; + + /* + * Check to see if we get an invalid message or a message error + * after failing to negotiate a wide or sync transfer message. + */ + if ((scb->flags & SCB_SENSE) && + ((scb->cmd->sense_buffer[12] == 0x43) || /* INVALID_MESSAGE */ + (scb->cmd->sense_buffer[12] == 0x49))) /* MESSAGE_ERROR */ + { + message_error = TRUE; + } + + if (scb->flags & SCB_MSGOUT_WDTR) + { + if (message_error) + { + if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) && + (aic_dev->flags & DEVICE_PRINT_DTR) ) + { + printk(INFO_LEAD "Device failed to complete Wide Negotiation " + "processing and\n", p->host_no, CTL_OF_SCB(scb)); + printk(INFO_LEAD "returned a sense error code for invalid message, " + "disabling future\n", p->host_no, CTL_OF_SCB(scb)); + printk(INFO_LEAD "Wide negotiation to this device.\n", p->host_no, + CTL_OF_SCB(scb)); + } + aic_dev->needwdtr = aic_dev->needwdtr_copy = 0; + } + } + if (scb->flags & SCB_MSGOUT_SDTR) + { + if (message_error) + { + if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) && + (aic_dev->flags & DEVICE_PRINT_DTR) ) + { + printk(INFO_LEAD "Device failed to complete Sync Negotiation " + "processing and\n", p->host_no, CTL_OF_SCB(scb)); + printk(INFO_LEAD "returned a sense error code for invalid message, " + "disabling future\n", p->host_no, CTL_OF_SCB(scb)); + printk(INFO_LEAD "Sync negotiation to this device.\n", p->host_no, + CTL_OF_SCB(scb)); + aic_dev->flags &= ~DEVICE_PRINT_DTR; + } + aic_dev->needsdtr = aic_dev->needsdtr_copy = 0; + } + } + if (scb->flags & SCB_MSGOUT_PPR) + { + if(message_error) + { + if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) && + (aic_dev->flags & DEVICE_PRINT_DTR) ) + { + printk(INFO_LEAD "Device failed to complete Parallel Protocol " + "Request processing and\n", p->host_no, CTL_OF_SCB(scb)); + printk(INFO_LEAD "returned a sense error code for invalid message, " + "disabling future\n", p->host_no, CTL_OF_SCB(scb)); + printk(INFO_LEAD "Parallel Protocol Request negotiation to this " + "device.\n", p->host_no, CTL_OF_SCB(scb)); + } + /* + * Disable PPR negotiation and revert back to WDTR and SDTR setup + */ + aic_dev->needppr = aic_dev->needppr_copy = 0; + aic_dev->needsdtr = aic_dev->needsdtr_copy = 1; + aic_dev->needwdtr = aic_dev->needwdtr_copy = 1; + } + } + } + + queue_depth = aic_dev->temp_q_depth; + if (queue_depth >= aic_dev->active_cmds) + { + scbp = scbq_remove_head(&aic_dev->delayed_scbs); + if (scbp) + { + if (queue_depth == 1) + { + /* + * Give extra preference to untagged devices, such as CD-R devices + * This makes it more likely that a drive *won't* stuff up while + * waiting on data at a critical time, such as CD-R writing and + * audio CD ripping operations. Should also benefit tape drives. + */ + scbq_insert_head(&p->waiting_scbs, scbp); + } + else + { + scbq_insert_tail(&p->waiting_scbs, scbp); + } +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (aic7xxx_verbose > 0xffff) + printk(INFO_LEAD "Moving SCB from delayed to waiting queue.\n", + p->host_no, CTL_OF_SCB(scbp)); +#endif + if (queue_depth > aic_dev->active_cmds) + { + scbp = scbq_remove_head(&aic_dev->delayed_scbs); + if (scbp) + scbq_insert_tail(&p->waiting_scbs, scbp); + } + } + } + if (!(scb->tag_action)) + { + aic7xxx_index_busy_target(p, scb->hscb->target_channel_lun, + /* unbusy */ TRUE); + if (cmd->device->simple_tags) + { + aic_dev->temp_q_depth = aic_dev->max_q_depth; + } + } + if(scb->flags & SCB_DTR_SCB) + { + aic_dev->dtr_pending = 0; + } + aic_dev->active_cmds--; + p->activescbs--; + + if ((scb->sg_length >= 512) && (((cmd->result >> 16) & 0xf) == DID_OK)) + { + long *ptr; + int x, i; + + + if (rq_data_dir(cmd->request) == WRITE) + { + aic_dev->w_total++; + ptr = aic_dev->w_bins; + } + else + { + aic_dev->r_total++; + ptr = aic_dev->r_bins; + } + if(cmd->device->simple_tags && cmd->request->flags & REQ_HARDBARRIER) + { + aic_dev->barrier_total++; + if(scb->tag_action == MSG_ORDERED_Q_TAG) + aic_dev->ordered_total++; + } + x = scb->sg_length; + x >>= 10; + for(i=0; i<6; i++) + { + x >>= 2; + if(!x) { + ptr[i]++; + break; + } + } + if(i == 6 && x) + ptr[5]++; + } + aic7xxx_free_scb(p, scb); + aic7xxx_queue_cmd_complete(p, cmd); + +} + +/*+F************************************************************************* + * Function: + * aic7xxx_run_done_queue + * + * Description: + * Calls the aic7xxx_done() for the Scsi_Cmnd of each scb in the + * aborted list, and adds each scb to the free list. If complete + * is TRUE, we also process the commands complete list. + *-F*************************************************************************/ +static void +aic7xxx_run_done_queue(struct aic7xxx_host *p, /*complete*/ int complete) +{ + struct aic7xxx_scb *scb; + int i, found = 0; + + for (i = 0; i < p->scb_data->numscbs; i++) + { + scb = p->scb_data->scb_array[i]; + if (scb->flags & SCB_QUEUED_FOR_DONE) + { + if (scb->flags & SCB_QUEUE_FULL) + { + scb->cmd->result = QUEUE_FULL << 1; + } + else + { + if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS)) + printk(INFO_LEAD "Aborting scb %d\n", + p->host_no, CTL_OF_SCB(scb), scb->hscb->tag); + /* + * Clear any residual information since the normal aic7xxx_done() path + * doesn't touch the residuals. + */ + scb->hscb->residual_SG_segment_count = 0; + scb->hscb->residual_data_count[0] = 0; + scb->hscb->residual_data_count[1] = 0; + scb->hscb->residual_data_count[2] = 0; + } + found++; + aic7xxx_done(p, scb); + } + } + if (aic7xxx_verbose & (VERBOSE_ABORT_RETURN | VERBOSE_RESET_RETURN)) + { + printk(INFO_LEAD "%d commands found and queued for " + "completion.\n", p->host_no, -1, -1, -1, found); + } + if (complete) + { + aic7xxx_done_cmds_complete(p); + } +} + +/*+F************************************************************************* + * Function: + * aic7xxx_abort_waiting_scb + * + * Description: + * Manipulate the waiting for selection list and return the + * scb that follows the one that we remove. + *-F*************************************************************************/ +static unsigned char +aic7xxx_abort_waiting_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb, + unsigned char scbpos, unsigned char prev) +{ + unsigned char curscb, next; + + /* + * Select the SCB we want to abort and pull the next pointer out of it. + */ + curscb = aic_inb(p, SCBPTR); + aic_outb(p, scbpos, SCBPTR); + next = aic_inb(p, SCB_NEXT); + + aic7xxx_add_curscb_to_free_list(p); + + /* + * Update the waiting list + */ + if (prev == SCB_LIST_NULL) + { + /* + * First in the list + */ + aic_outb(p, next, WAITING_SCBH); + } + else + { + /* + * Select the scb that pointed to us and update its next pointer. + */ + aic_outb(p, prev, SCBPTR); + aic_outb(p, next, SCB_NEXT); + } + /* + * Point us back at the original scb position and inform the SCSI + * system that the command has been aborted. + */ + aic_outb(p, curscb, SCBPTR); + return (next); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_search_qinfifo + * + * Description: + * Search the queue-in FIFO for matching SCBs and conditionally + * requeue. Returns the number of matching SCBs. + *-F*************************************************************************/ +static int +aic7xxx_search_qinfifo(struct aic7xxx_host *p, int target, int channel, + int lun, unsigned char tag, int flags, int requeue, + volatile scb_queue_type *queue) +{ + int found; + unsigned char qinpos, qintail; + struct aic7xxx_scb *scbp; + + found = 0; + qinpos = aic_inb(p, QINPOS); + qintail = p->qinfifonext; + + p->qinfifonext = qinpos; + + while (qinpos != qintail) + { + scbp = p->scb_data->scb_array[p->qinfifo[qinpos++]]; + if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag)) + { + /* + * We found an scb that needs to be removed. + */ + if (requeue && (queue != NULL)) + { + if (scbp->flags & SCB_WAITINGQ) + { + scbq_remove(queue, scbp); + scbq_remove(&p->waiting_scbs, scbp); + scbq_remove(&AIC_DEV(scbp->cmd)->delayed_scbs, scbp); + AIC_DEV(scbp->cmd)->active_cmds++; + p->activescbs++; + } + scbq_insert_tail(queue, scbp); + AIC_DEV(scbp->cmd)->active_cmds--; + p->activescbs--; + scbp->flags |= SCB_WAITINGQ; + if ( !(scbp->tag_action & TAG_ENB) ) + { + aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun, + TRUE); + } + } + else if (requeue) + { + p->qinfifo[p->qinfifonext++] = scbp->hscb->tag; + } + else + { + /* + * Preserve any SCB_RECOVERY_SCB flags on this scb then set the + * flags we were called with, presumeably so aic7xxx_run_done_queue + * can find this scb + */ + scbp->flags = flags | (scbp->flags & SCB_RECOVERY_SCB); + if (aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun, + FALSE) == scbp->hscb->tag) + { + aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun, + TRUE); + } + } + found++; + } + else + { + p->qinfifo[p->qinfifonext++] = scbp->hscb->tag; + } + } + /* + * Now that we've done the work, clear out any left over commands in the + * qinfifo and update the KERNEL_QINPOS down on the card. + * + * NOTE: This routine expect the sequencer to already be paused when + * it is run....make sure it's that way! + */ + qinpos = p->qinfifonext; + while(qinpos != qintail) + { + p->qinfifo[qinpos++] = SCB_LIST_NULL; + } + if (p->features & AHC_QUEUE_REGS) + aic_outb(p, p->qinfifonext, HNSCB_QOFF); + else + aic_outb(p, p->qinfifonext, KERNEL_QINPOS); + + return (found); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_scb_on_qoutfifo + * + * Description: + * Is the scb that was passed to us currently on the qoutfifo? + *-F*************************************************************************/ +static int +aic7xxx_scb_on_qoutfifo(struct aic7xxx_host *p, struct aic7xxx_scb *scb) +{ + int i=0; + + while(p->qoutfifo[(p->qoutfifonext + i) & 0xff ] != SCB_LIST_NULL) + { + if(p->qoutfifo[(p->qoutfifonext + i) & 0xff ] == scb->hscb->tag) + return TRUE; + else + i++; + } + return FALSE; +} + + +/*+F************************************************************************* + * Function: + * aic7xxx_reset_device + * + * Description: + * The device at the given target/channel has been reset. Abort + * all active and queued scbs for that target/channel. This function + * need not worry about linked next pointers because if was a MSG_ABORT_TAG + * then we had a tagged command (no linked next), if it was MSG_ABORT or + * MSG_BUS_DEV_RESET then the device won't know about any commands any more + * and no busy commands will exist, and if it was a bus reset, then nothing + * knows about any linked next commands any more. In all cases, we don't + * need to worry about the linked next or busy scb, we just need to clear + * them. + *-F*************************************************************************/ +static void +aic7xxx_reset_device(struct aic7xxx_host *p, int target, int channel, + int lun, unsigned char tag) +{ + struct aic7xxx_scb *scbp, *prev_scbp; + struct scsi_device *sd; + unsigned char active_scb, tcl, scb_tag; + int i = 0, init_lists = FALSE; + struct aic_dev_data *aic_dev; + + /* + * Restore this when we're done + */ + active_scb = aic_inb(p, SCBPTR); + scb_tag = aic_inb(p, SCB_TAG); + + if (aic7xxx_verbose & (VERBOSE_RESET_PROCESS | VERBOSE_ABORT_PROCESS)) + { + printk(INFO_LEAD "Reset device, hardware_scb %d,\n", + p->host_no, channel, target, lun, active_scb); + printk(INFO_LEAD "Current scb %d, SEQADDR 0x%x, LASTPHASE " + "0x%x\n", + p->host_no, channel, target, lun, scb_tag, + aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8), + aic_inb(p, LASTPHASE)); + printk(INFO_LEAD "SG_CACHEPTR 0x%x, SG_COUNT %d, SCSISIGI 0x%x\n", + p->host_no, channel, target, lun, + (p->features & AHC_ULTRA2) ? aic_inb(p, SG_CACHEPTR) : 0, + aic_inb(p, SG_COUNT), aic_inb(p, SCSISIGI)); + printk(INFO_LEAD "SSTAT0 0x%x, SSTAT1 0x%x, SSTAT2 0x%x\n", + p->host_no, channel, target, lun, aic_inb(p, SSTAT0), + aic_inb(p, SSTAT1), aic_inb(p, SSTAT2)); + } + + /* + * Deal with the busy target and linked next issues. + */ + list_for_each_entry(aic_dev, &p->aic_devs, list) + { + if (aic7xxx_verbose & (VERBOSE_RESET_PROCESS | VERBOSE_ABORT_PROCESS)) + printk(INFO_LEAD "processing aic_dev %p\n", p->host_no, channel, target, + lun, aic_dev); + sd = aic_dev->SDptr; + + if((target != ALL_TARGETS && target != sd->id) || + (channel != ALL_CHANNELS && channel != sd->channel)) + continue; + if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS)) + printk(INFO_LEAD "Cleaning up status information " + "and delayed_scbs.\n", p->host_no, sd->channel, sd->id, sd->lun); + aic_dev->flags &= ~BUS_DEVICE_RESET_PENDING; + if ( tag == SCB_LIST_NULL ) + { + aic_dev->dtr_pending = 0; + aic_dev->needppr = aic_dev->needppr_copy; + aic_dev->needsdtr = aic_dev->needsdtr_copy; + aic_dev->needwdtr = aic_dev->needwdtr_copy; + aic_dev->flags = DEVICE_PRINT_DTR; + aic_dev->temp_q_depth = aic_dev->max_q_depth; + } + tcl = (sd->id << 4) | (sd->channel << 3) | sd->lun; + if ( (aic7xxx_index_busy_target(p, tcl, FALSE) == tag) || + (tag == SCB_LIST_NULL) ) + aic7xxx_index_busy_target(p, tcl, /* unbusy */ TRUE); + prev_scbp = NULL; + scbp = aic_dev->delayed_scbs.head; + while (scbp != NULL) + { + prev_scbp = scbp; + scbp = scbp->q_next; + if (aic7xxx_match_scb(p, prev_scbp, target, channel, lun, tag)) + { + scbq_remove(&aic_dev->delayed_scbs, prev_scbp); + if (prev_scbp->flags & SCB_WAITINGQ) + { + aic_dev->active_cmds++; + p->activescbs++; + } + prev_scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ); + prev_scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE; + } + } + } + + if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS)) + printk(INFO_LEAD "Cleaning QINFIFO.\n", p->host_no, channel, target, lun ); + aic7xxx_search_qinfifo(p, target, channel, lun, tag, + SCB_RESET | SCB_QUEUED_FOR_DONE, /* requeue */ FALSE, NULL); + +/* + * Search the waiting_scbs queue for matches, this catches any SCB_QUEUED + * ABORT/RESET commands. + */ + if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS)) + printk(INFO_LEAD "Cleaning waiting_scbs.\n", p->host_no, channel, + target, lun ); + { + struct aic7xxx_scb *scbp, *prev_scbp; + + prev_scbp = NULL; + scbp = p->waiting_scbs.head; + while (scbp != NULL) + { + prev_scbp = scbp; + scbp = scbp->q_next; + if (aic7xxx_match_scb(p, prev_scbp, target, channel, lun, tag)) + { + scbq_remove(&p->waiting_scbs, prev_scbp); + if (prev_scbp->flags & SCB_WAITINGQ) + { + AIC_DEV(prev_scbp->cmd)->active_cmds++; + p->activescbs++; + } + prev_scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ); + prev_scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE; + } + } + } + + + /* + * Search waiting for selection list. + */ + if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS)) + printk(INFO_LEAD "Cleaning waiting for selection " + "list.\n", p->host_no, channel, target, lun); + { + unsigned char next, prev, scb_index; + + next = aic_inb(p, WAITING_SCBH); /* Start at head of list. */ + prev = SCB_LIST_NULL; + while (next != SCB_LIST_NULL) + { + aic_outb(p, next, SCBPTR); + scb_index = aic_inb(p, SCB_TAG); + if (scb_index >= p->scb_data->numscbs) + { + /* + * No aic7xxx_verbose check here.....we want to see this since it + * means either the kernel driver or the sequencer screwed things up + */ + printk(WARN_LEAD "Waiting List inconsistency; SCB index=%d, " + "numscbs=%d\n", p->host_no, channel, target, lun, scb_index, + p->scb_data->numscbs); + next = aic_inb(p, SCB_NEXT); + aic7xxx_add_curscb_to_free_list(p); + } + else + { + scbp = p->scb_data->scb_array[scb_index]; + if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag)) + { + next = aic7xxx_abort_waiting_scb(p, scbp, next, prev); + if (scbp->flags & SCB_WAITINGQ) + { + AIC_DEV(scbp->cmd)->active_cmds++; + p->activescbs++; + } + scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ); + scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE; + if (prev == SCB_LIST_NULL) + { + /* + * This is either the first scb on the waiting list, or we + * have already yanked the first and haven't left any behind. + * Either way, we need to turn off the selection hardware if + * it isn't already off. + */ + aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ); + aic_outb(p, CLRSELTIMEO, CLRSINT1); + } + } + else + { + prev = next; + next = aic_inb(p, SCB_NEXT); + } + } + } + } + + /* + * Go through disconnected list and remove any entries we have queued + * for completion, zeroing their control byte too. + */ + if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS)) + printk(INFO_LEAD "Cleaning disconnected scbs " + "list.\n", p->host_no, channel, target, lun); + if (p->flags & AHC_PAGESCBS) + { + unsigned char next, prev, scb_index; + + next = aic_inb(p, DISCONNECTED_SCBH); + prev = SCB_LIST_NULL; + while (next != SCB_LIST_NULL) + { + aic_outb(p, next, SCBPTR); + scb_index = aic_inb(p, SCB_TAG); + if (scb_index > p->scb_data->numscbs) + { + printk(WARN_LEAD "Disconnected List inconsistency; SCB index=%d, " + "numscbs=%d\n", p->host_no, channel, target, lun, scb_index, + p->scb_data->numscbs); + next = aic7xxx_rem_scb_from_disc_list(p, next, prev); + } + else + { + scbp = p->scb_data->scb_array[scb_index]; + if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag)) + { + next = aic7xxx_rem_scb_from_disc_list(p, next, prev); + if (scbp->flags & SCB_WAITINGQ) + { + AIC_DEV(scbp->cmd)->active_cmds++; + p->activescbs++; + } + scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ); + scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE; + scbp->hscb->control = 0; + } + else + { + prev = next; + next = aic_inb(p, SCB_NEXT); + } + } + } + } + + /* + * Walk the free list making sure no entries on the free list have + * a valid SCB_TAG value or SCB_CONTROL byte. + */ + if (p->flags & AHC_PAGESCBS) + { + unsigned char next; + + next = aic_inb(p, FREE_SCBH); + while (next != SCB_LIST_NULL) + { + aic_outb(p, next, SCBPTR); + if (aic_inb(p, SCB_TAG) < p->scb_data->numscbs) + { + printk(WARN_LEAD "Free list inconsistency!.\n", p->host_no, channel, + target, lun); + init_lists = TRUE; + next = SCB_LIST_NULL; + } + else + { + aic_outb(p, SCB_LIST_NULL, SCB_TAG); + aic_outb(p, 0, SCB_CONTROL); + next = aic_inb(p, SCB_NEXT); + } + } + } + + /* + * Go through the hardware SCB array looking for commands that + * were active but not on any list. + */ + if (init_lists) + { + aic_outb(p, SCB_LIST_NULL, FREE_SCBH); + aic_outb(p, SCB_LIST_NULL, WAITING_SCBH); + aic_outb(p, SCB_LIST_NULL, DISCONNECTED_SCBH); + } + for (i = p->scb_data->maxhscbs - 1; i >= 0; i--) + { + unsigned char scbid; + + aic_outb(p, i, SCBPTR); + if (init_lists) + { + aic_outb(p, SCB_LIST_NULL, SCB_TAG); + aic_outb(p, SCB_LIST_NULL, SCB_NEXT); + aic_outb(p, 0, SCB_CONTROL); + aic7xxx_add_curscb_to_free_list(p); + } + else + { + scbid = aic_inb(p, SCB_TAG); + if (scbid < p->scb_data->numscbs) + { + scbp = p->scb_data->scb_array[scbid]; + if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag)) + { + aic_outb(p, 0, SCB_CONTROL); + aic_outb(p, SCB_LIST_NULL, SCB_TAG); + aic7xxx_add_curscb_to_free_list(p); + } + } + } + } + + /* + * Go through the entire SCB array now and look for commands for + * for this target that are stillactive. These are other (most likely + * tagged) commands that were disconnected when the reset occurred. + * Any commands we find here we know this about, it wasn't on any queue, + * it wasn't in the qinfifo, it wasn't in the disconnected or waiting + * lists, so it really must have been a paged out SCB. In that case, + * we shouldn't need to bother with updating any counters, just mark + * the correct flags and go on. + */ + for (i = 0; i < p->scb_data->numscbs; i++) + { + scbp = p->scb_data->scb_array[i]; + if ((scbp->flags & SCB_ACTIVE) && + aic7xxx_match_scb(p, scbp, target, channel, lun, tag) && + !aic7xxx_scb_on_qoutfifo(p, scbp)) + { + if (scbp->flags & SCB_WAITINGQ) + { + scbq_remove(&p->waiting_scbs, scbp); + scbq_remove(&AIC_DEV(scbp->cmd)->delayed_scbs, scbp); + AIC_DEV(scbp->cmd)->active_cmds++; + p->activescbs++; + } + scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE; + scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ); + } + } + + aic_outb(p, active_scb, SCBPTR); +} + + +/*+F************************************************************************* + * Function: + * aic7xxx_clear_intstat + * + * Description: + * Clears the interrupt status. + *-F*************************************************************************/ +static void +aic7xxx_clear_intstat(struct aic7xxx_host *p) +{ + /* Clear any interrupt conditions this may have caused. */ + aic_outb(p, CLRSELDO | CLRSELDI | CLRSELINGO, CLRSINT0); + aic_outb(p, CLRSELTIMEO | CLRATNO | CLRSCSIRSTI | CLRBUSFREE | CLRSCSIPERR | + CLRPHASECHG | CLRREQINIT, CLRSINT1); + aic_outb(p, CLRSCSIINT | CLRSEQINT | CLRBRKADRINT | CLRPARERR, CLRINT); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_reset_current_bus + * + * Description: + * Reset the current SCSI bus. + *-F*************************************************************************/ +static void +aic7xxx_reset_current_bus(struct aic7xxx_host *p) +{ + + /* Disable reset interrupts. */ + aic_outb(p, aic_inb(p, SIMODE1) & ~ENSCSIRST, SIMODE1); + + /* Turn off the bus' current operations, after all, we shouldn't have any + * valid commands left to cause a RSELI and SELO once we've tossed the + * bus away with this reset, so we might as well shut down the sequencer + * until the bus is restarted as oppossed to saving the current settings + * and restoring them (which makes no sense to me). */ + + /* Turn on the bus reset. */ + aic_outb(p, aic_inb(p, SCSISEQ) | SCSIRSTO, SCSISEQ); + while ( (aic_inb(p, SCSISEQ) & SCSIRSTO) == 0) + mdelay(5); + + /* + * Some of the new Ultra2 chipsets need a longer delay after a chip + * reset than just the init setup creates, so we have to delay here + * before we go into a reset in order to make the chips happy. + */ + if (p->features & AHC_ULTRA2) + mdelay(250); + else + mdelay(50); + + /* Turn off the bus reset. */ + aic_outb(p, 0, SCSISEQ); + mdelay(10); + + aic7xxx_clear_intstat(p); + /* Re-enable reset interrupts. */ + aic_outb(p, aic_inb(p, SIMODE1) | ENSCSIRST, SIMODE1); + +} + +/*+F************************************************************************* + * Function: + * aic7xxx_reset_channel + * + * Description: + * Reset the channel. + *-F*************************************************************************/ +static void +aic7xxx_reset_channel(struct aic7xxx_host *p, int channel, int initiate_reset) +{ + unsigned long offset_min, offset_max; + unsigned char sblkctl; + int cur_channel; + + if (aic7xxx_verbose & VERBOSE_RESET_PROCESS) + printk(INFO_LEAD "Reset channel called, %s initiate reset.\n", + p->host_no, channel, -1, -1, (initiate_reset==TRUE) ? "will" : "won't" ); + + + if (channel == 1) + { + offset_min = 8; + offset_max = 16; + } + else + { + if (p->features & AHC_TWIN) + { + /* Channel A */ + offset_min = 0; + offset_max = 8; + } + else + { + offset_min = 0; + if (p->features & AHC_WIDE) + { + offset_max = 16; + } + else + { + offset_max = 8; + } + } + } + + while (offset_min < offset_max) + { + /* + * Revert to async/narrow transfers until we renegotiate. + */ + aic_outb(p, 0, TARG_SCSIRATE + offset_min); + if (p->features & AHC_ULTRA2) + { + aic_outb(p, 0, TARG_OFFSET + offset_min); + } + offset_min++; + } + + /* + * Reset the bus and unpause/restart the controller + */ + sblkctl = aic_inb(p, SBLKCTL); + if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 ) + cur_channel = (sblkctl & SELBUSB) >> 3; + else + cur_channel = 0; + if ( (cur_channel != channel) && (p->features & AHC_TWIN) ) + { + /* + * Case 1: Command for another bus is active + */ + if (aic7xxx_verbose & VERBOSE_RESET_PROCESS) + printk(INFO_LEAD "Stealthily resetting idle channel.\n", p->host_no, + channel, -1, -1); + /* + * Stealthily reset the other bus without upsetting the current bus. + */ + aic_outb(p, sblkctl ^ SELBUSB, SBLKCTL); + aic_outb(p, aic_inb(p, SIMODE1) & ~ENBUSFREE, SIMODE1); + if (initiate_reset) + { + aic7xxx_reset_current_bus(p); + } + aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP), SCSISEQ); + aic7xxx_clear_intstat(p); + aic_outb(p, sblkctl, SBLKCTL); + } + else + { + /* + * Case 2: A command from this bus is active or we're idle. + */ + if (aic7xxx_verbose & VERBOSE_RESET_PROCESS) + printk(INFO_LEAD "Resetting currently active channel.\n", p->host_no, + channel, -1, -1); + aic_outb(p, aic_inb(p, SIMODE1) & ~(ENBUSFREE|ENREQINIT), + SIMODE1); + p->flags &= ~AHC_HANDLING_REQINITS; + p->msg_type = MSG_TYPE_NONE; + p->msg_len = 0; + if (initiate_reset) + { + aic7xxx_reset_current_bus(p); + } + aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP), SCSISEQ); + aic7xxx_clear_intstat(p); + } + if (aic7xxx_verbose & VERBOSE_RESET_RETURN) + printk(INFO_LEAD "Channel reset\n", p->host_no, channel, -1, -1); + /* + * Clean up all the state information for the pending transactions + * on this bus. + */ + aic7xxx_reset_device(p, ALL_TARGETS, channel, ALL_LUNS, SCB_LIST_NULL); + + if ( !(p->features & AHC_TWIN) ) + { + restart_sequencer(p); + } + + return; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_run_waiting_queues + * + * Description: + * Scan the awaiting_scbs queue downloading and starting as many + * scbs as we can. + *-F*************************************************************************/ +static void +aic7xxx_run_waiting_queues(struct aic7xxx_host *p) +{ + struct aic7xxx_scb *scb; + struct aic_dev_data *aic_dev; + int sent; + + + if (p->waiting_scbs.head == NULL) + return; + + sent = 0; + + /* + * First handle SCBs that are waiting but have been assigned a slot. + */ + while ((scb = scbq_remove_head(&p->waiting_scbs)) != NULL) + { + aic_dev = scb->cmd->device->hostdata; + if ( !scb->tag_action ) + { + aic_dev->temp_q_depth = 1; + } + if ( aic_dev->active_cmds >= aic_dev->temp_q_depth) + { + scbq_insert_tail(&aic_dev->delayed_scbs, scb); + } + else + { + scb->flags &= ~SCB_WAITINGQ; + aic_dev->active_cmds++; + p->activescbs++; + if ( !(scb->tag_action) ) + { + aic7xxx_busy_target(p, scb); + } + p->qinfifo[p->qinfifonext++] = scb->hscb->tag; + sent++; + } + } + if (sent) + { + if (p->features & AHC_QUEUE_REGS) + aic_outb(p, p->qinfifonext, HNSCB_QOFF); + else + { + pause_sequencer(p); + aic_outb(p, p->qinfifonext, KERNEL_QINPOS); + unpause_sequencer(p, FALSE); + } + if (p->activescbs > p->max_activescbs) + p->max_activescbs = p->activescbs; + } +} + +#ifdef CONFIG_PCI + +#define DPE 0x80 +#define SSE 0x40 +#define RMA 0x20 +#define RTA 0x10 +#define STA 0x08 +#define DPR 0x01 + +/*+F************************************************************************* + * Function: + * aic7xxx_pci_intr + * + * Description: + * Check the scsi card for PCI errors and clear the interrupt + * + * NOTE: If you don't have this function and a 2940 card encounters + * a PCI error condition, the machine will end up locked as the + * interrupt handler gets slammed with non-stop PCI error interrupts + *-F*************************************************************************/ +static void +aic7xxx_pci_intr(struct aic7xxx_host *p) +{ + unsigned char status1; + + pci_read_config_byte(p->pdev, PCI_STATUS + 1, &status1); + + if ( (status1 & DPE) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) ) + printk(WARN_LEAD "Data Parity Error during PCI address or PCI write" + "phase.\n", p->host_no, -1, -1, -1); + if ( (status1 & SSE) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) ) + printk(WARN_LEAD "Signal System Error Detected\n", p->host_no, + -1, -1, -1); + if ( (status1 & RMA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) ) + printk(WARN_LEAD "Received a PCI Master Abort\n", p->host_no, + -1, -1, -1); + if ( (status1 & RTA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) ) + printk(WARN_LEAD "Received a PCI Target Abort\n", p->host_no, + -1, -1, -1); + if ( (status1 & STA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) ) + printk(WARN_LEAD "Signaled a PCI Target Abort\n", p->host_no, + -1, -1, -1); + if ( (status1 & DPR) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) ) + printk(WARN_LEAD "Data Parity Error has been reported via PCI pin " + "PERR#\n", p->host_no, -1, -1, -1); + + pci_write_config_byte(p->pdev, PCI_STATUS + 1, status1); + if (status1 & (DPR|RMA|RTA)) + aic_outb(p, CLRPARERR, CLRINT); + + if ( (aic7xxx_panic_on_abort) && (p->spurious_int > 500) ) + aic7xxx_panic_abort(p, NULL); + +} +#endif /* CONFIG_PCI */ + +/*+F************************************************************************* + * Function: + * aic7xxx_construct_ppr + * + * Description: + * Build up a Parallel Protocol Request message for use with SCSI-3 + * devices. + *-F*************************************************************************/ +static void +aic7xxx_construct_ppr(struct aic7xxx_host *p, struct aic7xxx_scb *scb) +{ + p->msg_buf[p->msg_index++] = MSG_EXTENDED; + p->msg_buf[p->msg_index++] = MSG_EXT_PPR_LEN; + p->msg_buf[p->msg_index++] = MSG_EXT_PPR; + p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.period; + p->msg_buf[p->msg_index++] = 0; + p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.offset; + p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.width; + p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.options; + p->msg_len += 8; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_construct_sdtr + * + * Description: + * Constucts a synchronous data transfer message in the message + * buffer on the sequencer. + *-F*************************************************************************/ +static void +aic7xxx_construct_sdtr(struct aic7xxx_host *p, unsigned char period, + unsigned char offset) +{ + p->msg_buf[p->msg_index++] = MSG_EXTENDED; + p->msg_buf[p->msg_index++] = MSG_EXT_SDTR_LEN; + p->msg_buf[p->msg_index++] = MSG_EXT_SDTR; + p->msg_buf[p->msg_index++] = period; + p->msg_buf[p->msg_index++] = offset; + p->msg_len += 5; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_construct_wdtr + * + * Description: + * Constucts a wide data transfer message in the message buffer + * on the sequencer. + *-F*************************************************************************/ +static void +aic7xxx_construct_wdtr(struct aic7xxx_host *p, unsigned char bus_width) +{ + p->msg_buf[p->msg_index++] = MSG_EXTENDED; + p->msg_buf[p->msg_index++] = MSG_EXT_WDTR_LEN; + p->msg_buf[p->msg_index++] = MSG_EXT_WDTR; + p->msg_buf[p->msg_index++] = bus_width; + p->msg_len += 4; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_calc_residual + * + * Description: + * Calculate the residual data not yet transferred. + *-F*************************************************************************/ +static void +aic7xxx_calculate_residual (struct aic7xxx_host *p, struct aic7xxx_scb *scb) +{ + struct aic7xxx_hwscb *hscb; + Scsi_Cmnd *cmd; + int actual, i; + + cmd = scb->cmd; + hscb = scb->hscb; + + /* + * Don't destroy valid residual information with + * residual coming from a check sense operation. + */ + if (((scb->hscb->control & DISCONNECTED) == 0) && + (scb->flags & SCB_SENSE) == 0) + { + /* + * We had an underflow. At this time, there's only + * one other driver that bothers to check for this, + * and cmd->underflow seems to be set rather half- + * heartedly in the higher-level SCSI code. + */ + actual = scb->sg_length; + for (i=1; i < hscb->residual_SG_segment_count; i++) + { + actual -= scb->sg_list[scb->sg_count - i].length; + } + actual -= (hscb->residual_data_count[2] << 16) | + (hscb->residual_data_count[1] << 8) | + hscb->residual_data_count[0]; + + if (actual < cmd->underflow) + { + if (aic7xxx_verbose & VERBOSE_MINOR_ERROR) + { + printk(INFO_LEAD "Underflow - Wanted %u, %s %u, residual SG " + "count %d.\n", p->host_no, CTL_OF_SCB(scb), cmd->underflow, + (rq_data_dir(cmd->request) == WRITE) ? "wrote" : "read", actual, + hscb->residual_SG_segment_count); + printk(INFO_LEAD "status 0x%x.\n", p->host_no, CTL_OF_SCB(scb), + hscb->target_status); + } + /* + * In 2.4, only send back the residual information, don't flag this + * as an error. Before 2.4 we had to flag this as an error because + * the mid layer didn't check residual data counts to see if the + * command needs retried. + */ + cmd->resid = scb->sg_length - actual; + aic7xxx_status(cmd) = hscb->target_status; + } + } + + /* + * Clean out the residual information in the SCB for the + * next consumer. + */ + hscb->residual_data_count[2] = 0; + hscb->residual_data_count[1] = 0; + hscb->residual_data_count[0] = 0; + hscb->residual_SG_segment_count = 0; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_handle_device_reset + * + * Description: + * Interrupt handler for sequencer interrupts (SEQINT). + *-F*************************************************************************/ +static void +aic7xxx_handle_device_reset(struct aic7xxx_host *p, int target, int channel) +{ + unsigned char tindex = target; + + tindex |= ((channel & 0x01) << 3); + + /* + * Go back to async/narrow transfers and renegotiate. + */ + aic_outb(p, 0, TARG_SCSIRATE + tindex); + if (p->features & AHC_ULTRA2) + aic_outb(p, 0, TARG_OFFSET + tindex); + aic7xxx_reset_device(p, target, channel, ALL_LUNS, SCB_LIST_NULL); + if (aic7xxx_verbose & VERBOSE_RESET_PROCESS) + printk(INFO_LEAD "Bus Device Reset delivered.\n", p->host_no, channel, + target, -1); + aic7xxx_run_done_queue(p, /*complete*/ TRUE); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_handle_seqint + * + * Description: + * Interrupt handler for sequencer interrupts (SEQINT). + *-F*************************************************************************/ +static void +aic7xxx_handle_seqint(struct aic7xxx_host *p, unsigned char intstat) +{ + struct aic7xxx_scb *scb; + struct aic_dev_data *aic_dev; + unsigned short target_mask; + unsigned char target, lun, tindex; + unsigned char queue_flag = FALSE; + char channel; + int result; + + target = ((aic_inb(p, SAVED_TCL) >> 4) & 0x0f); + if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 ) + channel = (aic_inb(p, SBLKCTL) & SELBUSB) >> 3; + else + channel = 0; + tindex = target + (channel << 3); + lun = aic_inb(p, SAVED_TCL) & 0x07; + target_mask = (0x01 << tindex); + + /* + * Go ahead and clear the SEQINT now, that avoids any interrupt race + * conditions later on in case we enable some other interrupt. + */ + aic_outb(p, CLRSEQINT, CLRINT); + switch (intstat & SEQINT_MASK) + { + case NO_MATCH: + { + aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP), + SCSISEQ); + printk(WARN_LEAD "No active SCB for reconnecting target - Issuing " + "BUS DEVICE RESET.\n", p->host_no, channel, target, lun); + printk(WARN_LEAD " SAVED_TCL=0x%x, ARG_1=0x%x, SEQADDR=0x%x\n", + p->host_no, channel, target, lun, + aic_inb(p, SAVED_TCL), aic_inb(p, ARG_1), + (aic_inb(p, SEQADDR1) << 8) | aic_inb(p, SEQADDR0)); + if (aic7xxx_panic_on_abort) + aic7xxx_panic_abort(p, NULL); + } + break; + + case SEND_REJECT: + { + if (aic7xxx_verbose & VERBOSE_MINOR_ERROR) + printk(INFO_LEAD "Rejecting unknown message (0x%x) received from " + "target, SEQ_FLAGS=0x%x\n", p->host_no, channel, target, lun, + aic_inb(p, ACCUM), aic_inb(p, SEQ_FLAGS)); + } + break; + + case NO_IDENT: + { + /* + * The reconnecting target either did not send an identify + * message, or did, but we didn't find an SCB to match and + * before it could respond to our ATN/abort, it hit a dataphase. + * The only safe thing to do is to blow it away with a bus + * reset. + */ + if (aic7xxx_verbose & (VERBOSE_SEQINT | VERBOSE_RESET_MID)) + printk(INFO_LEAD "Target did not send an IDENTIFY message; " + "LASTPHASE 0x%x, SAVED_TCL 0x%x\n", p->host_no, channel, target, + lun, aic_inb(p, LASTPHASE), aic_inb(p, SAVED_TCL)); + + aic7xxx_reset_channel(p, channel, /*initiate reset*/ TRUE); + aic7xxx_run_done_queue(p, TRUE); + + } + break; + + case BAD_PHASE: + if (aic_inb(p, LASTPHASE) == P_BUSFREE) + { + if (aic7xxx_verbose & VERBOSE_SEQINT) + printk(INFO_LEAD "Missed busfree.\n", p->host_no, channel, + target, lun); + restart_sequencer(p); + } + else + { + if (aic7xxx_verbose & VERBOSE_SEQINT) + printk(INFO_LEAD "Unknown scsi bus phase, continuing\n", p->host_no, + channel, target, lun); + } + break; + + case EXTENDED_MSG: + { + p->msg_type = MSG_TYPE_INITIATOR_MSGIN; + p->msg_len = 0; + p->msg_index = 0; + +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (aic7xxx_verbose > 0xffff) + printk(INFO_LEAD "Enabling REQINITs for MSG_IN\n", p->host_no, + channel, target, lun); +#endif + + /* + * To actually receive the message, simply turn on + * REQINIT interrupts and let our interrupt handler + * do the rest (REQINIT should already be true). + */ + p->flags |= AHC_HANDLING_REQINITS; + aic_outb(p, aic_inb(p, SIMODE1) | ENREQINIT, SIMODE1); + + /* + * We don't want the sequencer unpaused yet so we return early + */ + return; + } + + case REJECT_MSG: + { + /* + * What we care about here is if we had an outstanding SDTR + * or WDTR message for this target. If we did, this is a + * signal that the target is refusing negotiation. + */ + unsigned char scb_index; + unsigned char last_msg; + + scb_index = aic_inb(p, SCB_TAG); + scb = p->scb_data->scb_array[scb_index]; + aic_dev = AIC_DEV(scb->cmd); + last_msg = aic_inb(p, LAST_MSG); + + if ( (last_msg == MSG_IDENTIFYFLAG) && + (scb->tag_action) && + !(scb->flags & SCB_MSGOUT_BITS) ) + { + if (scb->tag_action == MSG_ORDERED_Q_TAG) + { + /* + * OK...the device seems able to accept tagged commands, but + * not ordered tag commands, only simple tag commands. So, we + * disable ordered tag commands and go on with life just like + * normal. + */ + scsi_adjust_queue_depth(scb->cmd->device, MSG_SIMPLE_TAG, + scb->cmd->device->queue_depth); + scb->tag_action = MSG_SIMPLE_Q_TAG; + scb->hscb->control &= ~SCB_TAG_TYPE; + scb->hscb->control |= MSG_SIMPLE_Q_TAG; + aic_outb(p, scb->hscb->control, SCB_CONTROL); + /* + * OK..we set the tag type to simple tag command, now we re-assert + * ATNO and hope this will take us into the identify phase again + * so we can resend the tag type and info to the device. + */ + aic_outb(p, MSG_IDENTIFYFLAG, MSG_OUT); + aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO); + } + else if (scb->tag_action == MSG_SIMPLE_Q_TAG) + { + unsigned char i; + struct aic7xxx_scb *scbp; + int old_verbose; + /* + * Hmmmm....the device is flaking out on tagged commands. + */ + scsi_adjust_queue_depth(scb->cmd->device, 0 /* untagged */, + p->host->cmd_per_lun); + aic_dev->max_q_depth = aic_dev->temp_q_depth = 1; + /* + * We set this command up as a bus device reset. However, we have + * to clear the tag type as it's causing us problems. We shouldnt + * have to worry about any other commands being active, since if + * the device is refusing tagged commands, this should be the + * first tagged command sent to the device, however, we do have + * to worry about any other tagged commands that may already be + * in the qinfifo. The easiest way to do this, is to issue a BDR, + * send all the commands back to the mid level code, then let them + * come back and get rebuilt as untagged commands. + */ + scb->tag_action = 0; + scb->hscb->control &= ~(TAG_ENB | SCB_TAG_TYPE); + aic_outb(p, scb->hscb->control, SCB_CONTROL); + + old_verbose = aic7xxx_verbose; + aic7xxx_verbose &= ~(VERBOSE_RESET|VERBOSE_ABORT); + for (i=0; i < p->scb_data->numscbs; i++) + { + scbp = p->scb_data->scb_array[i]; + if ((scbp->flags & SCB_ACTIVE) && (scbp != scb)) + { + if (aic7xxx_match_scb(p, scbp, target, channel, lun, i)) + { + aic7xxx_reset_device(p, target, channel, lun, i); + } + } + } + aic7xxx_run_done_queue(p, TRUE); + aic7xxx_verbose = old_verbose; + /* + * Wait until after the for loop to set the busy index since + * aic7xxx_reset_device will clear the busy index during its + * operation. + */ + aic7xxx_busy_target(p, scb); + printk(INFO_LEAD "Device is refusing tagged commands, using " + "untagged I/O.\n", p->host_no, channel, target, lun); + aic_outb(p, MSG_IDENTIFYFLAG, MSG_OUT); + aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO); + } + } + else if (scb->flags & SCB_MSGOUT_PPR) + { + /* + * As per the draft specs, any device capable of supporting any of + * the option values other than 0 are not allowed to reject the + * PPR message. Instead, they must negotiate out what they do + * support instead of rejecting our offering or else they cause + * a parity error during msg_out phase to signal that they don't + * like our settings. + */ + aic_dev->needppr = aic_dev->needppr_copy = 0; + aic7xxx_set_width(p, target, channel, lun, MSG_EXT_WDTR_BUS_8_BIT, + (AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE), aic_dev); + aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0, 0, + AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE, + aic_dev); + aic_dev->goal.options = aic_dev->dtr_pending = 0; + scb->flags &= ~SCB_MSGOUT_BITS; + if(aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Device is rejecting PPR messages, falling " + "back.\n", p->host_no, channel, target, lun); + } + if ( aic_dev->goal.width ) + { + aic_dev->needwdtr = aic_dev->needwdtr_copy = 1; + aic_dev->dtr_pending = 1; + scb->flags |= SCB_MSGOUT_WDTR; + } + if ( aic_dev->goal.offset ) + { + aic_dev->needsdtr = aic_dev->needsdtr_copy = 1; + if( !aic_dev->dtr_pending ) + { + aic_dev->dtr_pending = 1; + scb->flags |= SCB_MSGOUT_SDTR; + } + } + if ( aic_dev->dtr_pending ) + { + aic_outb(p, HOST_MSG, MSG_OUT); + aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO); + } + } + else if (scb->flags & SCB_MSGOUT_WDTR) + { + /* + * note 8bit xfers and clear flag + */ + aic_dev->needwdtr = aic_dev->needwdtr_copy = 0; + scb->flags &= ~SCB_MSGOUT_BITS; + aic7xxx_set_width(p, target, channel, lun, MSG_EXT_WDTR_BUS_8_BIT, + (AHC_TRANS_ACTIVE|AHC_TRANS_GOAL|AHC_TRANS_CUR), aic_dev); + aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0, 0, + AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE, + aic_dev); + if(aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Device is rejecting WDTR messages, using " + "narrow transfers.\n", p->host_no, channel, target, lun); + } + aic_dev->needsdtr = aic_dev->needsdtr_copy; + } + else if (scb->flags & SCB_MSGOUT_SDTR) + { + /* + * note asynch xfers and clear flag + */ + aic_dev->needsdtr = aic_dev->needsdtr_copy = 0; + scb->flags &= ~SCB_MSGOUT_BITS; + aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0, 0, + (AHC_TRANS_CUR|AHC_TRANS_ACTIVE|AHC_TRANS_GOAL), aic_dev); + if(aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Device is rejecting SDTR messages, using " + "async transfers.\n", p->host_no, channel, target, lun); + } + } + else if (aic7xxx_verbose & VERBOSE_SEQINT) + { + /* + * Otherwise, we ignore it. + */ + printk(INFO_LEAD "Received MESSAGE_REJECT for unknown cause. " + "Ignoring.\n", p->host_no, channel, target, lun); + } + } + break; + + case BAD_STATUS: + { + unsigned char scb_index; + struct aic7xxx_hwscb *hscb; + Scsi_Cmnd *cmd; + + /* The sequencer will notify us when a command has an error that + * would be of interest to the kernel. This allows us to leave + * the sequencer running in the common case of command completes + * without error. The sequencer will have DMA'd the SCB back + * up to us, so we can reference the drivers SCB array. + * + * Set the default return value to 0 indicating not to send + * sense. The sense code will change this if needed and this + * reduces code duplication. + */ + aic_outb(p, 0, RETURN_1); + scb_index = aic_inb(p, SCB_TAG); + if (scb_index > p->scb_data->numscbs) + { + printk(WARN_LEAD "Invalid SCB during SEQINT 0x%02x, SCB_TAG %d.\n", + p->host_no, channel, target, lun, intstat, scb_index); + break; + } + scb = p->scb_data->scb_array[scb_index]; + hscb = scb->hscb; + + if (!(scb->flags & SCB_ACTIVE) || (scb->cmd == NULL)) + { + printk(WARN_LEAD "Invalid SCB during SEQINT 0x%x, scb %d, flags 0x%x," + " cmd 0x%lx.\n", p->host_no, channel, target, lun, intstat, + scb_index, scb->flags, (unsigned long) scb->cmd); + } + else + { + cmd = scb->cmd; + aic_dev = AIC_DEV(scb->cmd); + hscb->target_status = aic_inb(p, SCB_TARGET_STATUS); + aic7xxx_status(cmd) = hscb->target_status; + + cmd->result = hscb->target_status; + + switch (status_byte(hscb->target_status)) + { + case GOOD: + if (aic7xxx_verbose & VERBOSE_SEQINT) + printk(INFO_LEAD "Interrupted for status of GOOD???\n", + p->host_no, CTL_OF_SCB(scb)); + break; + + case COMMAND_TERMINATED: + case CHECK_CONDITION: + if ( !(scb->flags & SCB_SENSE) ) + { + /* + * Send a sense command to the requesting target. + * XXX - revisit this and get rid of the memcopys. + */ + memcpy(scb->sense_cmd, &generic_sense[0], + sizeof(generic_sense)); + + scb->sense_cmd[1] = (cmd->device->lun << 5); + scb->sense_cmd[4] = sizeof(cmd->sense_buffer); + + scb->sg_list[0].length = + cpu_to_le32(sizeof(cmd->sense_buffer)); + scb->sg_list[0].address = + cpu_to_le32(pci_map_single(p->pdev, cmd->sense_buffer, + sizeof(cmd->sense_buffer), + PCI_DMA_FROMDEVICE)); + + /* + * XXX - We should allow disconnection, but can't as it + * might allow overlapped tagged commands. + */ + /* hscb->control &= DISCENB; */ + hscb->control = 0; + hscb->target_status = 0; + hscb->SG_list_pointer = + cpu_to_le32(SCB_DMA_ADDR(scb, scb->sg_list)); + hscb->SCSI_cmd_pointer = + cpu_to_le32(SCB_DMA_ADDR(scb, scb->sense_cmd)); + hscb->data_count = scb->sg_list[0].length; + hscb->data_pointer = scb->sg_list[0].address; + hscb->SCSI_cmd_length = COMMAND_SIZE(scb->sense_cmd[0]); + hscb->residual_SG_segment_count = 0; + hscb->residual_data_count[0] = 0; + hscb->residual_data_count[1] = 0; + hscb->residual_data_count[2] = 0; + + scb->sg_count = hscb->SG_segment_count = 1; + scb->sg_length = sizeof(cmd->sense_buffer); + scb->tag_action = 0; + scb->flags |= SCB_SENSE; + /* + * Ensure the target is busy since this will be an + * an untagged request. + */ +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + if (scb->flags & SCB_MSGOUT_BITS) + printk(INFO_LEAD "Requesting SENSE with %s\n", p->host_no, + CTL_OF_SCB(scb), (scb->flags & SCB_MSGOUT_SDTR) ? + "SDTR" : "WDTR"); + else + printk(INFO_LEAD "Requesting SENSE, no MSG\n", p->host_no, + CTL_OF_SCB(scb)); + } +#endif + aic7xxx_busy_target(p, scb); + aic_outb(p, SEND_SENSE, RETURN_1); + aic7xxx_error(cmd) = DID_OK; + break; + } /* first time sense, no errors */ + printk(INFO_LEAD "CHECK_CONDITION on REQUEST_SENSE, returning " + "an error.\n", p->host_no, CTL_OF_SCB(scb)); + aic7xxx_error(cmd) = DID_ERROR; + scb->flags &= ~SCB_SENSE; + break; + + case QUEUE_FULL: + queue_flag = TRUE; /* Mark that this is a QUEUE_FULL and */ + case BUSY: /* drop through to here */ + { + struct aic7xxx_scb *next_scbp, *prev_scbp; + unsigned char active_hscb, next_hscb, prev_hscb, scb_index; + /* + * We have to look three places for queued commands: + * 1: p->waiting_scbs queue + * 2: QINFIFO + * 3: WAITING_SCBS list on card (for commands that are started + * but haven't yet made it to the device) + * + * Of special note here is that commands on 2 or 3 above will + * have already been marked as active, while commands on 1 will + * not. The aic7xxx_done() function will want to unmark them + * from active, so any commands we pull off of 1 need to + * up the active count. + */ + next_scbp = p->waiting_scbs.head; + while ( next_scbp != NULL ) + { + prev_scbp = next_scbp; + next_scbp = next_scbp->q_next; + if ( aic7xxx_match_scb(p, prev_scbp, target, channel, lun, + SCB_LIST_NULL) ) + { + scbq_remove(&p->waiting_scbs, prev_scbp); + scb->flags = SCB_QUEUED_FOR_DONE | SCB_QUEUE_FULL; + p->activescbs++; + aic_dev->active_cmds++; + } + } + aic7xxx_search_qinfifo(p, target, channel, lun, + SCB_LIST_NULL, SCB_QUEUED_FOR_DONE | SCB_QUEUE_FULL, + FALSE, NULL); + next_scbp = NULL; + active_hscb = aic_inb(p, SCBPTR); + prev_hscb = next_hscb = scb_index = SCB_LIST_NULL; + next_hscb = aic_inb(p, WAITING_SCBH); + while (next_hscb != SCB_LIST_NULL) + { + aic_outb(p, next_hscb, SCBPTR); + scb_index = aic_inb(p, SCB_TAG); + if (scb_index < p->scb_data->numscbs) + { + next_scbp = p->scb_data->scb_array[scb_index]; + if (aic7xxx_match_scb(p, next_scbp, target, channel, lun, + SCB_LIST_NULL) ) + { + next_scbp->flags = SCB_QUEUED_FOR_DONE | SCB_QUEUE_FULL; + next_hscb = aic_inb(p, SCB_NEXT); + aic_outb(p, 0, SCB_CONTROL); + aic_outb(p, SCB_LIST_NULL, SCB_TAG); + aic7xxx_add_curscb_to_free_list(p); + if (prev_hscb == SCB_LIST_NULL) + { + /* We were first on the list, + * so we kill the selection + * hardware. Let the sequencer + * re-init the hardware itself + */ + aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ); + aic_outb(p, CLRSELTIMEO, CLRSINT1); + aic_outb(p, next_hscb, WAITING_SCBH); + } + else + { + aic_outb(p, prev_hscb, SCBPTR); + aic_outb(p, next_hscb, SCB_NEXT); + } + } + else + { + prev_hscb = next_hscb; + next_hscb = aic_inb(p, SCB_NEXT); + } + } /* scb_index >= p->scb_data->numscbs */ + } + aic_outb(p, active_hscb, SCBPTR); + aic7xxx_run_done_queue(p, FALSE); + +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if( (aic7xxx_verbose & VERBOSE_MINOR_ERROR) || + (aic7xxx_verbose > 0xffff) ) + { + if (queue_flag) + printk(INFO_LEAD "Queue full received; queue depth %d, " + "active %d\n", p->host_no, CTL_OF_SCB(scb), + aic_dev->max_q_depth, aic_dev->active_cmds); + else + printk(INFO_LEAD "Target busy\n", p->host_no, CTL_OF_SCB(scb)); + } +#endif + if (queue_flag) + { + int diff; + result = scsi_track_queue_full(cmd->device, + aic_dev->active_cmds); + if ( result < 0 ) + { + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + printk(INFO_LEAD "Tagged Command Queueing disabled.\n", + p->host_no, CTL_OF_SCB(scb)); + diff = aic_dev->max_q_depth - p->host->cmd_per_lun; + aic_dev->temp_q_depth = 1; + aic_dev->max_q_depth = 1; + } + else if ( result > 0 ) + { + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + printk(INFO_LEAD "Queue depth reduced to %d\n", p->host_no, + CTL_OF_SCB(scb), result); + diff = aic_dev->max_q_depth - result; + aic_dev->max_q_depth = result; + /* temp_q_depth could have been dropped to 1 for an untagged + * command that might be coming up */ + if(aic_dev->temp_q_depth > result) + aic_dev->temp_q_depth = result; + } + /* We should free up the no unused SCB entries. But, that's + * a difficult thing to do because we use a direct indexed + * array, so we can't just take any entries and free them, + * we *have* to free the ones at the end of the array, and + * they very well could be in use right now, which means + * in order to do this right, we have to add a delayed + * freeing mechanism tied into the scb_free() code area. + * We'll add that later. + */ + } + break; + } + + default: + if (aic7xxx_verbose & VERBOSE_SEQINT) + printk(INFO_LEAD "Unexpected target status 0x%x.\n", p->host_no, + CTL_OF_SCB(scb), scb->hscb->target_status); + if (!aic7xxx_error(cmd)) + { + aic7xxx_error(cmd) = DID_RETRY_COMMAND; + } + break; + } /* end switch */ + } /* end else of */ + } + break; + + case AWAITING_MSG: + { + unsigned char scb_index, msg_out; + + scb_index = aic_inb(p, SCB_TAG); + msg_out = aic_inb(p, MSG_OUT); + scb = p->scb_data->scb_array[scb_index]; + aic_dev = AIC_DEV(scb->cmd); + p->msg_index = p->msg_len = 0; + /* + * This SCB had a MK_MESSAGE set in its control byte informing + * the sequencer that we wanted to send a special message to + * this target. + */ + + if ( !(scb->flags & SCB_DEVICE_RESET) && + (msg_out == MSG_IDENTIFYFLAG) && + (scb->hscb->control & TAG_ENB) ) + { + p->msg_buf[p->msg_index++] = scb->tag_action; + p->msg_buf[p->msg_index++] = scb->hscb->tag; + p->msg_len += 2; + } + + if (scb->flags & SCB_DEVICE_RESET) + { + p->msg_buf[p->msg_index++] = MSG_BUS_DEV_RESET; + p->msg_len++; + if (aic7xxx_verbose & VERBOSE_RESET_PROCESS) + printk(INFO_LEAD "Bus device reset mailed.\n", + p->host_no, CTL_OF_SCB(scb)); + } + else if (scb->flags & SCB_ABORT) + { + if (scb->tag_action) + { + p->msg_buf[p->msg_index++] = MSG_ABORT_TAG; + } + else + { + p->msg_buf[p->msg_index++] = MSG_ABORT; + } + p->msg_len++; + if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS) + printk(INFO_LEAD "Abort message mailed.\n", p->host_no, + CTL_OF_SCB(scb)); + } + else if (scb->flags & SCB_MSGOUT_PPR) + { + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Sending PPR (%d/%d/%d/%d) message.\n", + p->host_no, CTL_OF_SCB(scb), + aic_dev->goal.period, + aic_dev->goal.offset, + aic_dev->goal.width, + aic_dev->goal.options); + } + aic7xxx_construct_ppr(p, scb); + } + else if (scb->flags & SCB_MSGOUT_WDTR) + { + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Sending WDTR message.\n", p->host_no, + CTL_OF_SCB(scb)); + } + aic7xxx_construct_wdtr(p, aic_dev->goal.width); + } + else if (scb->flags & SCB_MSGOUT_SDTR) + { + unsigned int max_sync, period; + unsigned char options = 0; + /* + * Now that the device is selected, use the bits in SBLKCTL and + * SSTAT2 to determine the max sync rate for this device. + */ + if (p->features & AHC_ULTRA2) + { + if ( (aic_inb(p, SBLKCTL) & ENAB40) && + !(aic_inb(p, SSTAT2) & EXP_ACTIVE) ) + { + max_sync = AHC_SYNCRATE_ULTRA2; + } + else + { + max_sync = AHC_SYNCRATE_ULTRA; + } + } + else if (p->features & AHC_ULTRA) + { + max_sync = AHC_SYNCRATE_ULTRA; + } + else + { + max_sync = AHC_SYNCRATE_FAST; + } + period = aic_dev->goal.period; + aic7xxx_find_syncrate(p, &period, max_sync, &options); + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Sending SDTR %d/%d message.\n", p->host_no, + CTL_OF_SCB(scb), period, + aic_dev->goal.offset); + } + aic7xxx_construct_sdtr(p, period, aic_dev->goal.offset); + } + else + { + panic("aic7xxx: AWAITING_MSG for an SCB that does " + "not have a waiting message.\n"); + } + /* + * We've set everything up to send our message, now to actually do + * so we need to enable reqinit interrupts and let the interrupt + * handler do the rest. We don't want to unpause the sequencer yet + * though so we'll return early. We also have to make sure that + * we clear the SEQINT *BEFORE* we set the REQINIT handler active + * or else it's possible on VLB cards to lose the first REQINIT + * interrupt. Edge triggered EISA cards could also lose this + * interrupt, although PCI and level triggered cards should not + * have this problem since they continually interrupt the kernel + * until we take care of the situation. + */ + scb->flags |= SCB_MSGOUT_SENT; + p->msg_index = 0; + p->msg_type = MSG_TYPE_INITIATOR_MSGOUT; + p->flags |= AHC_HANDLING_REQINITS; + aic_outb(p, aic_inb(p, SIMODE1) | ENREQINIT, SIMODE1); + return; + } + break; + + case DATA_OVERRUN: + { + unsigned char scb_index = aic_inb(p, SCB_TAG); + unsigned char lastphase = aic_inb(p, LASTPHASE); + unsigned int i; + + scb = (p->scb_data->scb_array[scb_index]); + /* + * XXX - What do we really want to do on an overrun? The + * mid-level SCSI code should handle this, but for now, + * we'll just indicate that the command should retried. + * If we retrieved sense info on this target, then the + * base SENSE info should have been saved prior to the + * overrun error. In that case, we return DID_OK and let + * the mid level code pick up on the sense info. Otherwise + * we return DID_ERROR so the command will get retried. + */ + if ( !(scb->flags & SCB_SENSE) ) + { + printk(WARN_LEAD "Data overrun detected in %s phase, tag %d;\n", + p->host_no, CTL_OF_SCB(scb), + (lastphase == P_DATAIN) ? "Data-In" : "Data-Out", scb->hscb->tag); + printk(KERN_WARNING " %s seen Data Phase. Length=%d, NumSGs=%d.\n", + (aic_inb(p, SEQ_FLAGS) & DPHASE) ? "Have" : "Haven't", + scb->sg_length, scb->sg_count); + printk(KERN_WARNING " Raw SCSI Command: 0x"); + for (i = 0; i < scb->hscb->SCSI_cmd_length; i++) + { + printk("%02x ", scb->cmd->cmnd[i]); + } + printk("\n"); + if(aic7xxx_verbose > 0xffff) + { + for (i = 0; i < scb->sg_count; i++) + { + printk(KERN_WARNING " sg[%d] - Addr 0x%x : Length %d\n", + i, + le32_to_cpu(scb->sg_list[i].address), + le32_to_cpu(scb->sg_list[i].length) ); + } + } + aic7xxx_error(scb->cmd) = DID_ERROR; + } + else + printk(INFO_LEAD "Data Overrun during SEND_SENSE operation.\n", + p->host_no, CTL_OF_SCB(scb)); + } + break; + + case WIDE_RESIDUE: + { + unsigned char resid_sgcnt, index; + unsigned char scb_index = aic_inb(p, SCB_TAG); + unsigned int cur_addr, resid_dcnt; + unsigned int native_addr, native_length, sg_addr; + int i; + + if(scb_index > p->scb_data->numscbs) + { + printk(WARN_LEAD "invalid scb_index during WIDE_RESIDUE.\n", + p->host_no, -1, -1, -1); + /* + * XXX: Add error handling here + */ + break; + } + scb = p->scb_data->scb_array[scb_index]; + if(!(scb->flags & SCB_ACTIVE) || (scb->cmd == NULL)) + { + printk(WARN_LEAD "invalid scb during WIDE_RESIDUE flags:0x%x " + "scb->cmd:0x%lx\n", p->host_no, CTL_OF_SCB(scb), + scb->flags, (unsigned long)scb->cmd); + break; + } + if(aic7xxx_verbose & VERBOSE_MINOR_ERROR) + printk(INFO_LEAD "Got WIDE_RESIDUE message, patching up data " + "pointer.\n", p->host_no, CTL_OF_SCB(scb)); + + /* + * We have a valid scb to use on this WIDE_RESIDUE message, so + * we need to walk the sg list looking for this particular sg + * segment, then see if we happen to be at the very beginning of + * the segment. If we are, then we have to back things up to + * the previous segment. If not, then we simply need to remove + * one byte from this segments address and add one to the byte + * count. + */ + cur_addr = aic_inb(p, SHADDR) | (aic_inb(p, SHADDR + 1) << 8) | + (aic_inb(p, SHADDR + 2) << 16) | (aic_inb(p, SHADDR + 3) << 24); + sg_addr = aic_inb(p, SG_COUNT + 1) | (aic_inb(p, SG_COUNT + 2) << 8) | + (aic_inb(p, SG_COUNT + 3) << 16) | (aic_inb(p, SG_COUNT + 4) << 24); + resid_sgcnt = aic_inb(p, SCB_RESID_SGCNT); + resid_dcnt = aic_inb(p, SCB_RESID_DCNT) | + (aic_inb(p, SCB_RESID_DCNT + 1) << 8) | + (aic_inb(p, SCB_RESID_DCNT + 2) << 16); + index = scb->sg_count - ((resid_sgcnt) ? resid_sgcnt : 1); + native_addr = le32_to_cpu(scb->sg_list[index].address); + native_length = le32_to_cpu(scb->sg_list[index].length); + /* + * If resid_dcnt == native_length, then we just loaded this SG + * segment and we need to back it up one... + */ + if(resid_dcnt == native_length) + { + if(index == 0) + { + /* + * Oops, this isn't right, we can't back up to before the + * beginning. This must be a bogus message, ignore it. + */ + break; + } + resid_dcnt = 1; + resid_sgcnt += 1; + native_addr = le32_to_cpu(scb->sg_list[index - 1].address); + native_length = le32_to_cpu(scb->sg_list[index - 1].length); + cur_addr = native_addr + (native_length - 1); + sg_addr -= sizeof(struct hw_scatterlist); + } + else + { + /* + * resid_dcnt != native_length, so we are in the middle of a SG + * element. Back it up one byte and leave the rest alone. + */ + resid_dcnt += 1; + cur_addr -= 1; + } + + /* + * Output the new addresses and counts to the right places on the + * card. + */ + aic_outb(p, resid_sgcnt, SG_COUNT); + aic_outb(p, resid_sgcnt, SCB_RESID_SGCNT); + aic_outb(p, sg_addr & 0xff, SG_COUNT + 1); + aic_outb(p, (sg_addr >> 8) & 0xff, SG_COUNT + 2); + aic_outb(p, (sg_addr >> 16) & 0xff, SG_COUNT + 3); + aic_outb(p, (sg_addr >> 24) & 0xff, SG_COUNT + 4); + aic_outb(p, resid_dcnt & 0xff, SCB_RESID_DCNT); + aic_outb(p, (resid_dcnt >> 8) & 0xff, SCB_RESID_DCNT + 1); + aic_outb(p, (resid_dcnt >> 16) & 0xff, SCB_RESID_DCNT + 2); + + /* + * The sequencer actually wants to find the new address + * in the SHADDR register set. On the Ultra2 and later controllers + * this register set is readonly. In order to get the right number + * into the register, you actually have to enter it in HADDR and then + * use the PRELOADEN bit of DFCNTRL to drop it through from the + * HADDR register to the SHADDR register. On non-Ultra2 controllers, + * we simply write it direct. + */ + if(p->features & AHC_ULTRA2) + { + /* + * We might as well be accurate and drop both the resid_dcnt and + * cur_addr into HCNT and HADDR and have both of them drop + * through to the shadow layer together. + */ + aic_outb(p, resid_dcnt & 0xff, HCNT); + aic_outb(p, (resid_dcnt >> 8) & 0xff, HCNT + 1); + aic_outb(p, (resid_dcnt >> 16) & 0xff, HCNT + 2); + aic_outb(p, cur_addr & 0xff, HADDR); + aic_outb(p, (cur_addr >> 8) & 0xff, HADDR + 1); + aic_outb(p, (cur_addr >> 16) & 0xff, HADDR + 2); + aic_outb(p, (cur_addr >> 24) & 0xff, HADDR + 3); + aic_outb(p, aic_inb(p, DMAPARAMS) | PRELOADEN, DFCNTRL); + udelay(1); + aic_outb(p, aic_inb(p, DMAPARAMS) & ~(SCSIEN|HDMAEN), DFCNTRL); + i=0; + while(((aic_inb(p, DFCNTRL) & (SCSIEN|HDMAEN)) != 0) && (i++ < 1000)) + { + udelay(1); + } + } + else + { + aic_outb(p, cur_addr & 0xff, SHADDR); + aic_outb(p, (cur_addr >> 8) & 0xff, SHADDR + 1); + aic_outb(p, (cur_addr >> 16) & 0xff, SHADDR + 2); + aic_outb(p, (cur_addr >> 24) & 0xff, SHADDR + 3); + } + } + break; + + case SEQ_SG_FIXUP: + { + unsigned char scb_index, tmp; + int sg_addr, sg_length; + + scb_index = aic_inb(p, SCB_TAG); + + if(scb_index > p->scb_data->numscbs) + { + printk(WARN_LEAD "invalid scb_index during SEQ_SG_FIXUP.\n", + p->host_no, -1, -1, -1); + printk(INFO_LEAD "SCSISIGI 0x%x, SEQADDR 0x%x, SSTAT0 0x%x, SSTAT1 " + "0x%x\n", p->host_no, -1, -1, -1, + aic_inb(p, SCSISIGI), + aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8), + aic_inb(p, SSTAT0), aic_inb(p, SSTAT1)); + printk(INFO_LEAD "SG_CACHEPTR 0x%x, SSTAT2 0x%x, STCNT 0x%x\n", + p->host_no, -1, -1, -1, aic_inb(p, SG_CACHEPTR), + aic_inb(p, SSTAT2), aic_inb(p, STCNT + 2) << 16 | + aic_inb(p, STCNT + 1) << 8 | aic_inb(p, STCNT)); + /* + * XXX: Add error handling here + */ + break; + } + scb = p->scb_data->scb_array[scb_index]; + if(!(scb->flags & SCB_ACTIVE) || (scb->cmd == NULL)) + { + printk(WARN_LEAD "invalid scb during SEQ_SG_FIXUP flags:0x%x " + "scb->cmd:0x%p\n", p->host_no, CTL_OF_SCB(scb), + scb->flags, scb->cmd); + printk(INFO_LEAD "SCSISIGI 0x%x, SEQADDR 0x%x, SSTAT0 0x%x, SSTAT1 " + "0x%x\n", p->host_no, CTL_OF_SCB(scb), + aic_inb(p, SCSISIGI), + aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8), + aic_inb(p, SSTAT0), aic_inb(p, SSTAT1)); + printk(INFO_LEAD "SG_CACHEPTR 0x%x, SSTAT2 0x%x, STCNT 0x%x\n", + p->host_no, CTL_OF_SCB(scb), aic_inb(p, SG_CACHEPTR), + aic_inb(p, SSTAT2), aic_inb(p, STCNT + 2) << 16 | + aic_inb(p, STCNT + 1) << 8 | aic_inb(p, STCNT)); + break; + } + if(aic7xxx_verbose & VERBOSE_MINOR_ERROR) + printk(INFO_LEAD "Fixing up SG address for sequencer.\n", p->host_no, + CTL_OF_SCB(scb)); + /* + * Advance the SG pointer to the next element in the list + */ + tmp = aic_inb(p, SG_NEXT); + tmp += SG_SIZEOF; + aic_outb(p, tmp, SG_NEXT); + if( tmp < SG_SIZEOF ) + aic_outb(p, aic_inb(p, SG_NEXT + 1) + 1, SG_NEXT + 1); + tmp = aic_inb(p, SG_COUNT) - 1; + aic_outb(p, tmp, SG_COUNT); + sg_addr = le32_to_cpu(scb->sg_list[scb->sg_count - tmp].address); + sg_length = le32_to_cpu(scb->sg_list[scb->sg_count - tmp].length); + /* + * Now stuff the element we just advanced past down onto the + * card so it can be stored in the residual area. + */ + aic_outb(p, sg_addr & 0xff, HADDR); + aic_outb(p, (sg_addr >> 8) & 0xff, HADDR + 1); + aic_outb(p, (sg_addr >> 16) & 0xff, HADDR + 2); + aic_outb(p, (sg_addr >> 24) & 0xff, HADDR + 3); + aic_outb(p, sg_length & 0xff, HCNT); + aic_outb(p, (sg_length >> 8) & 0xff, HCNT + 1); + aic_outb(p, (sg_length >> 16) & 0xff, HCNT + 2); + aic_outb(p, (tmp << 2) | ((tmp == 1) ? LAST_SEG : 0), SG_CACHEPTR); + aic_outb(p, aic_inb(p, DMAPARAMS), DFCNTRL); + while(aic_inb(p, SSTAT0) & SDONE) udelay(1); + while(aic_inb(p, DFCNTRL) & (HDMAEN|SCSIEN)) aic_outb(p, 0, DFCNTRL); + } + break; + +#ifdef AIC7XXX_NOT_YET + case TRACEPOINT2: + { + printk(INFO_LEAD "Tracepoint #2 reached.\n", p->host_no, + channel, target, lun); + } + break; + + /* XXX Fill these in later */ + case MSG_BUFFER_BUSY: + printk("aic7xxx: Message buffer busy.\n"); + break; + case MSGIN_PHASEMIS: + printk("aic7xxx: Message-in phasemis.\n"); + break; +#endif + + default: /* unknown */ + printk(WARN_LEAD "Unknown SEQINT, INTSTAT 0x%x, SCSISIGI 0x%x.\n", + p->host_no, channel, target, lun, intstat, + aic_inb(p, SCSISIGI)); + break; + } + + /* + * Clear the sequencer interrupt and unpause the sequencer. + */ + unpause_sequencer(p, /* unpause always */ TRUE); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_parse_msg + * + * Description: + * Parses incoming messages into actions on behalf of + * aic7xxx_handle_reqinit + *_F*************************************************************************/ +static int +aic7xxx_parse_msg(struct aic7xxx_host *p, struct aic7xxx_scb *scb) +{ + int reject, reply, done; + unsigned char target_scsirate, tindex; + unsigned short target_mask; + unsigned char target, channel, lun; + unsigned char bus_width, new_bus_width; + unsigned char trans_options, new_trans_options; + unsigned int period, new_period, offset, new_offset, maxsync; + struct aic7xxx_syncrate *syncrate; + struct aic_dev_data *aic_dev; + + target = scb->cmd->device->id; + channel = scb->cmd->device->channel; + lun = scb->cmd->device->lun; + reply = reject = done = FALSE; + tindex = TARGET_INDEX(scb->cmd); + aic_dev = AIC_DEV(scb->cmd); + target_scsirate = aic_inb(p, TARG_SCSIRATE + tindex); + target_mask = (0x01 << tindex); + + /* + * Parse as much of the message as is available, + * rejecting it if we don't support it. When + * the entire message is available and has been + * handled, return TRUE indicating that we have + * parsed an entire message. + */ + + if (p->msg_buf[0] != MSG_EXTENDED) + { + reject = TRUE; + } + + /* + * Even if we are an Ultra3 card, don't allow Ultra3 sync rates when + * using the SDTR messages. We need the PPR messages to enable the + * higher speeds that include things like Dual Edge clocking. + */ + if (p->features & AHC_ULTRA2) + { + if ( (aic_inb(p, SBLKCTL) & ENAB40) && + !(aic_inb(p, SSTAT2) & EXP_ACTIVE) ) + { + if (p->features & AHC_ULTRA3) + maxsync = AHC_SYNCRATE_ULTRA3; + else + maxsync = AHC_SYNCRATE_ULTRA2; + } + else + { + maxsync = AHC_SYNCRATE_ULTRA; + } + } + else if (p->features & AHC_ULTRA) + { + maxsync = AHC_SYNCRATE_ULTRA; + } + else + { + maxsync = AHC_SYNCRATE_FAST; + } + + /* + * Just accept the length byte outright and perform + * more checking once we know the message type. + */ + + if ( !reject && (p->msg_len > 2) ) + { + switch(p->msg_buf[2]) + { + case MSG_EXT_SDTR: + { + + if (p->msg_buf[1] != MSG_EXT_SDTR_LEN) + { + reject = TRUE; + break; + } + + if (p->msg_len < (MSG_EXT_SDTR_LEN + 2)) + { + break; + } + + period = new_period = p->msg_buf[3]; + offset = new_offset = p->msg_buf[4]; + trans_options = new_trans_options = 0; + bus_width = new_bus_width = target_scsirate & WIDEXFER; + + /* + * If our current max syncrate is in the Ultra3 range, bump it back + * down to Ultra2 since we can't negotiate DT transfers using SDTR + */ + if(maxsync == AHC_SYNCRATE_ULTRA3) + maxsync = AHC_SYNCRATE_ULTRA2; + + /* + * We might have a device that is starting negotiation with us + * before we can start up negotiation with it....be prepared to + * have a device ask for a higher speed then we want to give it + * in that case + */ + if ( (scb->flags & (SCB_MSGOUT_SENT|SCB_MSGOUT_SDTR)) != + (SCB_MSGOUT_SENT|SCB_MSGOUT_SDTR) ) + { + if (!(aic_dev->flags & DEVICE_DTR_SCANNED)) + { + /* + * We shouldn't get here unless this is a narrow drive, wide + * devices should trigger this same section of code in the WDTR + * handler first instead. + */ + aic_dev->goal.width = MSG_EXT_WDTR_BUS_8_BIT; + aic_dev->goal.options = 0; + if(p->user[tindex].offset) + { + aic_dev->needsdtr_copy = 1; + aic_dev->goal.period = max_t(unsigned char, 10,p->user[tindex].period); + if(p->features & AHC_ULTRA2) + { + aic_dev->goal.offset = MAX_OFFSET_ULTRA2; + } + else + { + aic_dev->goal.offset = MAX_OFFSET_8BIT; + } + } + else + { + aic_dev->needsdtr_copy = 0; + aic_dev->goal.period = 255; + aic_dev->goal.offset = 0; + } + aic_dev->flags |= DEVICE_DTR_SCANNED | DEVICE_PRINT_DTR; + } + else if (aic_dev->needsdtr_copy == 0) + { + /* + * This is a preemptive message from the target, we've already + * scanned this target and set our options for it, and we + * don't need a SDTR with this target (for whatever reason), + * so reject this incoming SDTR + */ + reject = TRUE; + break; + } + + /* The device is sending this message first and we have to reply */ + reply = TRUE; + + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Received pre-emptive SDTR message from " + "target.\n", p->host_no, CTL_OF_SCB(scb)); + } + /* + * Validate the values the device passed to us against our SEEPROM + * settings. We don't have to do this if we aren't replying since + * the device isn't allowed to send values greater than the ones + * we first sent to it. + */ + new_period = max_t(unsigned int, period, aic_dev->goal.period); + new_offset = min_t(unsigned int, offset, aic_dev->goal.offset); + } + + /* + * Use our new_period, new_offset, bus_width, and card options + * to determine the actual syncrate settings + */ + syncrate = aic7xxx_find_syncrate(p, &new_period, maxsync, + &trans_options); + aic7xxx_validate_offset(p, syncrate, &new_offset, bus_width); + + /* + * Did we drop to async? If so, send a reply regardless of whether + * or not we initiated this negotiation. + */ + if ((new_offset == 0) && (new_offset != offset)) + { + aic_dev->needsdtr_copy = 0; + reply = TRUE; + } + + /* + * Did we start this, if not, or if we went too low and had to + * go async, then send an SDTR back to the target + */ + if(reply) + { + /* when sending a reply, make sure that the goal settings are + * updated along with current and active since the code that + * will actually build the message for the sequencer uses the + * goal settings as its guidelines. + */ + aic7xxx_set_syncrate(p, syncrate, target, channel, new_period, + new_offset, trans_options, + AHC_TRANS_GOAL|AHC_TRANS_ACTIVE|AHC_TRANS_CUR, + aic_dev); + scb->flags &= ~SCB_MSGOUT_BITS; + scb->flags |= SCB_MSGOUT_SDTR; + aic_outb(p, HOST_MSG, MSG_OUT); + aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO); + } + else + { + aic7xxx_set_syncrate(p, syncrate, target, channel, new_period, + new_offset, trans_options, + AHC_TRANS_ACTIVE|AHC_TRANS_CUR, aic_dev); + aic_dev->needsdtr = 0; + } + done = TRUE; + break; + } + case MSG_EXT_WDTR: + { + + if (p->msg_buf[1] != MSG_EXT_WDTR_LEN) + { + reject = TRUE; + break; + } + + if (p->msg_len < (MSG_EXT_WDTR_LEN + 2)) + { + break; + } + + bus_width = new_bus_width = p->msg_buf[3]; + + if ( (scb->flags & (SCB_MSGOUT_SENT|SCB_MSGOUT_WDTR)) == + (SCB_MSGOUT_SENT|SCB_MSGOUT_WDTR) ) + { + switch(bus_width) + { + default: + { + reject = TRUE; + if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) && + ((aic_dev->flags & DEVICE_PRINT_DTR) || + (aic7xxx_verbose > 0xffff)) ) + { + printk(INFO_LEAD "Requesting %d bit transfers, rejecting.\n", + p->host_no, CTL_OF_SCB(scb), 8 * (0x01 << bus_width)); + } + } /* We fall through on purpose */ + case MSG_EXT_WDTR_BUS_8_BIT: + { + aic_dev->goal.width = MSG_EXT_WDTR_BUS_8_BIT; + aic_dev->needwdtr_copy &= ~target_mask; + break; + } + case MSG_EXT_WDTR_BUS_16_BIT: + { + break; + } + } + aic_dev->needwdtr = 0; + aic7xxx_set_width(p, target, channel, lun, new_bus_width, + AHC_TRANS_ACTIVE|AHC_TRANS_CUR, aic_dev); + } + else + { + if ( !(aic_dev->flags & DEVICE_DTR_SCANNED) ) + { + /* + * Well, we now know the WDTR and SYNC caps of this device since + * it contacted us first, mark it as such and copy the user stuff + * over to the goal stuff. + */ + if( (p->features & AHC_WIDE) && p->user[tindex].width ) + { + aic_dev->goal.width = MSG_EXT_WDTR_BUS_16_BIT; + aic_dev->needwdtr_copy = 1; + } + + /* + * Devices that support DT transfers don't start WDTR requests + */ + aic_dev->goal.options = 0; + + if(p->user[tindex].offset) + { + aic_dev->needsdtr_copy = 1; + aic_dev->goal.period = max_t(unsigned char, 10, p->user[tindex].period); + if(p->features & AHC_ULTRA2) + { + aic_dev->goal.offset = MAX_OFFSET_ULTRA2; + } + else if( aic_dev->goal.width ) + { + aic_dev->goal.offset = MAX_OFFSET_16BIT; + } + else + { + aic_dev->goal.offset = MAX_OFFSET_8BIT; + } + } else { + aic_dev->needsdtr_copy = 0; + aic_dev->goal.period = 255; + aic_dev->goal.offset = 0; + } + + aic_dev->flags |= DEVICE_DTR_SCANNED | DEVICE_PRINT_DTR; + } + else if (aic_dev->needwdtr_copy == 0) + { + /* + * This is a preemptive message from the target, we've already + * scanned this target and set our options for it, and we + * don't need a WDTR with this target (for whatever reason), + * so reject this incoming WDTR + */ + reject = TRUE; + break; + } + + /* The device is sending this message first and we have to reply */ + reply = TRUE; + + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Received pre-emptive WDTR message from " + "target.\n", p->host_no, CTL_OF_SCB(scb)); + } + switch(bus_width) + { + case MSG_EXT_WDTR_BUS_16_BIT: + { + if ( (p->features & AHC_WIDE) && + (aic_dev->goal.width == MSG_EXT_WDTR_BUS_16_BIT) ) + { + new_bus_width = MSG_EXT_WDTR_BUS_16_BIT; + break; + } + } /* Fall through if we aren't a wide card */ + default: + case MSG_EXT_WDTR_BUS_8_BIT: + { + aic_dev->needwdtr_copy = 0; + new_bus_width = MSG_EXT_WDTR_BUS_8_BIT; + break; + } + } + scb->flags &= ~SCB_MSGOUT_BITS; + scb->flags |= SCB_MSGOUT_WDTR; + aic_dev->needwdtr = 0; + if(aic_dev->dtr_pending == 0) + { + /* there is no other command with SCB_DTR_SCB already set that will + * trigger the release of the dtr_pending bit. Both set the bit + * and set scb->flags |= SCB_DTR_SCB + */ + aic_dev->dtr_pending = 1; + scb->flags |= SCB_DTR_SCB; + } + aic_outb(p, HOST_MSG, MSG_OUT); + aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO); + /* when sending a reply, make sure that the goal settings are + * updated along with current and active since the code that + * will actually build the message for the sequencer uses the + * goal settings as its guidelines. + */ + aic7xxx_set_width(p, target, channel, lun, new_bus_width, + AHC_TRANS_GOAL|AHC_TRANS_ACTIVE|AHC_TRANS_CUR, + aic_dev); + } + + /* + * By virtue of the SCSI spec, a WDTR message negates any existing + * SDTR negotiations. So, even if needsdtr isn't marked for this + * device, we still have to do a new SDTR message if the device + * supports SDTR at all. Therefore, we check needsdtr_copy instead + * of needstr. + */ + aic7xxx_set_syncrate(p, NULL, target, channel, 0, 0, 0, + AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE, + aic_dev); + aic_dev->needsdtr = aic_dev->needsdtr_copy; + done = TRUE; + break; + } + case MSG_EXT_PPR: + { + + if (p->msg_buf[1] != MSG_EXT_PPR_LEN) + { + reject = TRUE; + break; + } + + if (p->msg_len < (MSG_EXT_PPR_LEN + 2)) + { + break; + } + + period = new_period = p->msg_buf[3]; + offset = new_offset = p->msg_buf[5]; + bus_width = new_bus_width = p->msg_buf[6]; + trans_options = new_trans_options = p->msg_buf[7] & 0xf; + + if(aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Parsing PPR message (%d/%d/%d/%d)\n", + p->host_no, CTL_OF_SCB(scb), period, offset, bus_width, + trans_options); + } + + /* + * We might have a device that is starting negotiation with us + * before we can start up negotiation with it....be prepared to + * have a device ask for a higher speed then we want to give it + * in that case + */ + if ( (scb->flags & (SCB_MSGOUT_SENT|SCB_MSGOUT_PPR)) != + (SCB_MSGOUT_SENT|SCB_MSGOUT_PPR) ) + { + /* Have we scanned the device yet? */ + if (!(aic_dev->flags & DEVICE_DTR_SCANNED)) + { + /* The device is electing to use PPR messages, so we will too until + * we know better */ + aic_dev->needppr = aic_dev->needppr_copy = 1; + aic_dev->needsdtr = aic_dev->needsdtr_copy = 0; + aic_dev->needwdtr = aic_dev->needwdtr_copy = 0; + + /* We know the device is SCSI-3 compliant due to PPR */ + aic_dev->flags |= DEVICE_SCSI_3; + + /* + * Not only is the device starting this up, but it also hasn't + * been scanned yet, so this would likely be our TUR or our + * INQUIRY command at scan time, so we need to use the + * settings from the SEEPROM if they existed. Of course, even + * if we didn't find a SEEPROM, we stuffed default values into + * the user settings anyway, so use those in all cases. + */ + aic_dev->goal.width = p->user[tindex].width; + if(p->user[tindex].offset) + { + aic_dev->goal.period = p->user[tindex].period; + aic_dev->goal.options = p->user[tindex].options; + if(p->features & AHC_ULTRA2) + { + aic_dev->goal.offset = MAX_OFFSET_ULTRA2; + } + else if( aic_dev->goal.width && + (bus_width == MSG_EXT_WDTR_BUS_16_BIT) && + p->features & AHC_WIDE ) + { + aic_dev->goal.offset = MAX_OFFSET_16BIT; + } + else + { + aic_dev->goal.offset = MAX_OFFSET_8BIT; + } + } + else + { + aic_dev->goal.period = 255; + aic_dev->goal.offset = 0; + aic_dev->goal.options = 0; + } + aic_dev->flags |= DEVICE_DTR_SCANNED | DEVICE_PRINT_DTR; + } + else if (aic_dev->needppr_copy == 0) + { + /* + * This is a preemptive message from the target, we've already + * scanned this target and set our options for it, and we + * don't need a PPR with this target (for whatever reason), + * so reject this incoming PPR + */ + reject = TRUE; + break; + } + + /* The device is sending this message first and we have to reply */ + reply = TRUE; + + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Received pre-emptive PPR message from " + "target.\n", p->host_no, CTL_OF_SCB(scb)); + } + + } + + switch(bus_width) + { + case MSG_EXT_WDTR_BUS_16_BIT: + { + if ( (aic_dev->goal.width == MSG_EXT_WDTR_BUS_16_BIT) && + p->features & AHC_WIDE) + { + break; + } + } + default: + { + if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) && + ((aic_dev->flags & DEVICE_PRINT_DTR) || + (aic7xxx_verbose > 0xffff)) ) + { + reply = TRUE; + printk(INFO_LEAD "Requesting %d bit transfers, rejecting.\n", + p->host_no, CTL_OF_SCB(scb), 8 * (0x01 << bus_width)); + } + } /* We fall through on purpose */ + case MSG_EXT_WDTR_BUS_8_BIT: + { + /* + * According to the spec, if we aren't wide, we also can't be + * Dual Edge so clear the options byte + */ + new_trans_options = 0; + new_bus_width = MSG_EXT_WDTR_BUS_8_BIT; + break; + } + } + + if(reply) + { + /* when sending a reply, make sure that the goal settings are + * updated along with current and active since the code that + * will actually build the message for the sequencer uses the + * goal settings as its guidelines. + */ + aic7xxx_set_width(p, target, channel, lun, new_bus_width, + AHC_TRANS_GOAL|AHC_TRANS_ACTIVE|AHC_TRANS_CUR, + aic_dev); + syncrate = aic7xxx_find_syncrate(p, &new_period, maxsync, + &new_trans_options); + aic7xxx_validate_offset(p, syncrate, &new_offset, new_bus_width); + aic7xxx_set_syncrate(p, syncrate, target, channel, new_period, + new_offset, new_trans_options, + AHC_TRANS_GOAL|AHC_TRANS_ACTIVE|AHC_TRANS_CUR, + aic_dev); + } + else + { + aic7xxx_set_width(p, target, channel, lun, new_bus_width, + AHC_TRANS_ACTIVE|AHC_TRANS_CUR, aic_dev); + syncrate = aic7xxx_find_syncrate(p, &new_period, maxsync, + &new_trans_options); + aic7xxx_validate_offset(p, syncrate, &new_offset, new_bus_width); + aic7xxx_set_syncrate(p, syncrate, target, channel, new_period, + new_offset, new_trans_options, + AHC_TRANS_ACTIVE|AHC_TRANS_CUR, aic_dev); + } + + /* + * As it turns out, if we don't *have* to have PPR messages, then + * configure ourselves not to use them since that makes some + * external drive chassis work (those chassis can't parse PPR + * messages and they mangle the SCSI bus until you send a WDTR + * and SDTR that they can understand). + */ + if(new_trans_options == 0) + { + aic_dev->needppr = aic_dev->needppr_copy = 0; + if(new_offset) + { + aic_dev->needsdtr = aic_dev->needsdtr_copy = 1; + } + if (new_bus_width) + { + aic_dev->needwdtr = aic_dev->needwdtr_copy = 1; + } + } + + if((new_offset == 0) && (offset != 0)) + { + /* + * Oops, the syncrate went to low for this card and we fell off + * to async (should never happen with a device that uses PPR + * messages, but have to be complete) + */ + reply = TRUE; + } + + if(reply) + { + scb->flags &= ~SCB_MSGOUT_BITS; + scb->flags |= SCB_MSGOUT_PPR; + aic_outb(p, HOST_MSG, MSG_OUT); + aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO); + } + else + { + aic_dev->needppr = 0; + } + done = TRUE; + break; + } + default: + { + reject = TRUE; + break; + } + } /* end of switch(p->msg_type) */ + } /* end of if (!reject && (p->msg_len > 2)) */ + + if (!reply && reject) + { + aic_outb(p, MSG_MESSAGE_REJECT, MSG_OUT); + aic_outb(p, aic_inb(p, SCSISIGO) | ATNO, SCSISIGO); + done = TRUE; + } + return(done); +} + + +/*+F************************************************************************* + * Function: + * aic7xxx_handle_reqinit + * + * Description: + * Interrupt handler for REQINIT interrupts (used to transfer messages to + * and from devices). + *_F*************************************************************************/ +static void +aic7xxx_handle_reqinit(struct aic7xxx_host *p, struct aic7xxx_scb *scb) +{ + unsigned char lastbyte; + unsigned char phasemis; + int done = FALSE; + + switch(p->msg_type) + { + case MSG_TYPE_INITIATOR_MSGOUT: + { + if (p->msg_len == 0) + panic("aic7xxx: REQINIT with no active message!\n"); + + lastbyte = (p->msg_index == (p->msg_len - 1)); + phasemis = ( aic_inb(p, SCSISIGI) & PHASE_MASK) != P_MESGOUT; + + if (lastbyte || phasemis) + { + /* Time to end the message */ + p->msg_len = 0; + p->msg_type = MSG_TYPE_NONE; + /* + * NOTE-TO-MYSELF: If you clear the REQINIT after you + * disable REQINITs, then cases of REJECT_MSG stop working + * and hang the bus + */ + aic_outb(p, aic_inb(p, SIMODE1) & ~ENREQINIT, SIMODE1); + aic_outb(p, CLRSCSIINT, CLRINT); + p->flags &= ~AHC_HANDLING_REQINITS; + + if (phasemis == 0) + { + aic_outb(p, p->msg_buf[p->msg_index], SINDEX); + aic_outb(p, 0, RETURN_1); +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (aic7xxx_verbose > 0xffff) + printk(INFO_LEAD "Completed sending of REQINIT message.\n", + p->host_no, CTL_OF_SCB(scb)); +#endif + } + else + { + aic_outb(p, MSGOUT_PHASEMIS, RETURN_1); +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (aic7xxx_verbose > 0xffff) + printk(INFO_LEAD "PHASEMIS while sending REQINIT message.\n", + p->host_no, CTL_OF_SCB(scb)); +#endif + } + unpause_sequencer(p, TRUE); + } + else + { + /* + * Present the byte on the bus (clearing REQINIT) but don't + * unpause the sequencer. + */ + aic_outb(p, CLRREQINIT, CLRSINT1); + aic_outb(p, CLRSCSIINT, CLRINT); + aic_outb(p, p->msg_buf[p->msg_index++], SCSIDATL); + } + break; + } + case MSG_TYPE_INITIATOR_MSGIN: + { + phasemis = ( aic_inb(p, SCSISIGI) & PHASE_MASK ) != P_MESGIN; + + if (phasemis == 0) + { + p->msg_len++; + /* Pull the byte in without acking it */ + p->msg_buf[p->msg_index] = aic_inb(p, SCSIBUSL); + done = aic7xxx_parse_msg(p, scb); + /* Ack the byte */ + aic_outb(p, CLRREQINIT, CLRSINT1); + aic_outb(p, CLRSCSIINT, CLRINT); + aic_inb(p, SCSIDATL); + p->msg_index++; + } + if (phasemis || done) + { +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (aic7xxx_verbose > 0xffff) + { + if (phasemis) + printk(INFO_LEAD "PHASEMIS while receiving REQINIT message.\n", + p->host_no, CTL_OF_SCB(scb)); + else + printk(INFO_LEAD "Completed receipt of REQINIT message.\n", + p->host_no, CTL_OF_SCB(scb)); + } +#endif + /* Time to end our message session */ + p->msg_len = 0; + p->msg_type = MSG_TYPE_NONE; + aic_outb(p, aic_inb(p, SIMODE1) & ~ENREQINIT, SIMODE1); + aic_outb(p, CLRSCSIINT, CLRINT); + p->flags &= ~AHC_HANDLING_REQINITS; + unpause_sequencer(p, TRUE); + } + break; + } + default: + { + panic("aic7xxx: Unknown REQINIT message type.\n"); + break; + } + } /* End of switch(p->msg_type) */ +} + +/*+F************************************************************************* + * Function: + * aic7xxx_handle_scsiint + * + * Description: + * Interrupt handler for SCSI interrupts (SCSIINT). + *-F*************************************************************************/ +static void +aic7xxx_handle_scsiint(struct aic7xxx_host *p, unsigned char intstat) +{ + unsigned char scb_index; + unsigned char status; + struct aic7xxx_scb *scb; + struct aic_dev_data *aic_dev; + + scb_index = aic_inb(p, SCB_TAG); + status = aic_inb(p, SSTAT1); + + if (scb_index < p->scb_data->numscbs) + { + scb = p->scb_data->scb_array[scb_index]; + if ((scb->flags & SCB_ACTIVE) == 0) + { + scb = NULL; + } + } + else + { + scb = NULL; + } + + + if ((status & SCSIRSTI) != 0) + { + int channel; + + if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 ) + channel = (aic_inb(p, SBLKCTL) & SELBUSB) >> 3; + else + channel = 0; + + if (aic7xxx_verbose & VERBOSE_RESET) + printk(WARN_LEAD "Someone else reset the channel!!\n", + p->host_no, channel, -1, -1); + if (aic7xxx_panic_on_abort) + aic7xxx_panic_abort(p, NULL); + /* + * Go through and abort all commands for the channel, but do not + * reset the channel again. + */ + aic7xxx_reset_channel(p, channel, /* Initiate Reset */ FALSE); + aic7xxx_run_done_queue(p, TRUE); + scb = NULL; + } + else if ( ((status & BUSFREE) != 0) && ((status & SELTO) == 0) ) + { + /* + * First look at what phase we were last in. If it's message-out, + * chances are pretty good that the bus free was in response to + * one of our abort requests. + */ + unsigned char lastphase = aic_inb(p, LASTPHASE); + unsigned char saved_tcl = aic_inb(p, SAVED_TCL); + unsigned char target = (saved_tcl >> 4) & 0x0F; + int channel; + int printerror = TRUE; + + if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 ) + channel = (aic_inb(p, SBLKCTL) & SELBUSB) >> 3; + else + channel = 0; + + aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP), + SCSISEQ); + if (lastphase == P_MESGOUT) + { + unsigned char message; + + message = aic_inb(p, SINDEX); + + if ((message == MSG_ABORT) || (message == MSG_ABORT_TAG)) + { + if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS) + printk(INFO_LEAD "SCB %d abort delivered.\n", p->host_no, + CTL_OF_SCB(scb), scb->hscb->tag); + aic7xxx_reset_device(p, target, channel, ALL_LUNS, + (message == MSG_ABORT) ? SCB_LIST_NULL : scb->hscb->tag ); + aic7xxx_run_done_queue(p, TRUE); + scb = NULL; + printerror = 0; + } + else if (message == MSG_BUS_DEV_RESET) + { + aic7xxx_handle_device_reset(p, target, channel); + scb = NULL; + printerror = 0; + } + } + if ( (scb != NULL) && (scb->flags & SCB_DTR_SCB) ) + { + /* + * Hmmm...error during a negotiation command. Either we have a + * borken bus, or the device doesn't like our negotiation message. + * Since we check the INQUIRY data of a device before sending it + * negotiation messages, assume the bus is borken for whatever + * reason. Complete the command. + */ + printerror = 0; + aic7xxx_reset_device(p, target, channel, ALL_LUNS, scb->hscb->tag); + aic7xxx_run_done_queue(p, TRUE); + scb = NULL; + } + if (printerror != 0) + { + if (scb != NULL) + { + unsigned char tag; + + if ((scb->hscb->control & TAG_ENB) != 0) + { + tag = scb->hscb->tag; + } + else + { + tag = SCB_LIST_NULL; + } + aic7xxx_reset_device(p, target, channel, ALL_LUNS, tag); + aic7xxx_run_done_queue(p, TRUE); + } + else + { + aic7xxx_reset_device(p, target, channel, ALL_LUNS, SCB_LIST_NULL); + aic7xxx_run_done_queue(p, TRUE); + } + printk(INFO_LEAD "Unexpected busfree, LASTPHASE = 0x%x, " + "SEQADDR = 0x%x\n", p->host_no, channel, target, -1, lastphase, + (aic_inb(p, SEQADDR1) << 8) | aic_inb(p, SEQADDR0)); + scb = NULL; + } + aic_outb(p, MSG_NOOP, MSG_OUT); + aic_outb(p, aic_inb(p, SIMODE1) & ~(ENBUSFREE|ENREQINIT), + SIMODE1); + p->flags &= ~AHC_HANDLING_REQINITS; + aic_outb(p, CLRBUSFREE, CLRSINT1); + aic_outb(p, CLRSCSIINT, CLRINT); + restart_sequencer(p); + unpause_sequencer(p, TRUE); + } + else if ((status & SELTO) != 0) + { + unsigned char scbptr; + unsigned char nextscb; + Scsi_Cmnd *cmd; + + scbptr = aic_inb(p, WAITING_SCBH); + if (scbptr > p->scb_data->maxhscbs) + { + /* + * I'm still trying to track down exactly how this happens, but until + * I find it, this code will make sure we aren't passing bogus values + * into the SCBPTR register, even if that register will just wrap + * things around, we still don't like having out of range variables. + * + * NOTE: Don't check the aic7xxx_verbose variable, I want this message + * to always be displayed. + */ + printk(INFO_LEAD "Invalid WAITING_SCBH value %d, improvising.\n", + p->host_no, -1, -1, -1, scbptr); + if (p->scb_data->maxhscbs > 4) + scbptr &= (p->scb_data->maxhscbs - 1); + else + scbptr &= 0x03; + } + aic_outb(p, scbptr, SCBPTR); + scb_index = aic_inb(p, SCB_TAG); + + scb = NULL; + if (scb_index < p->scb_data->numscbs) + { + scb = p->scb_data->scb_array[scb_index]; + if ((scb->flags & SCB_ACTIVE) == 0) + { + scb = NULL; + } + } + if (scb == NULL) + { + printk(WARN_LEAD "Referenced SCB %d not valid during SELTO.\n", + p->host_no, -1, -1, -1, scb_index); + printk(KERN_WARNING " SCSISEQ = 0x%x SEQADDR = 0x%x SSTAT0 = 0x%x " + "SSTAT1 = 0x%x\n", aic_inb(p, SCSISEQ), + aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8), + aic_inb(p, SSTAT0), aic_inb(p, SSTAT1)); + if (aic7xxx_panic_on_abort) + aic7xxx_panic_abort(p, NULL); + } + else + { + cmd = scb->cmd; + cmd->result = (DID_TIME_OUT << 16); + + /* + * Clear out this hardware SCB + */ + aic_outb(p, 0, SCB_CONTROL); + + /* + * Clear out a few values in the card that are in an undetermined + * state. + */ + aic_outb(p, MSG_NOOP, MSG_OUT); + + /* + * Shift the waiting for selection queue forward + */ + nextscb = aic_inb(p, SCB_NEXT); + aic_outb(p, nextscb, WAITING_SCBH); + + /* + * Put this SCB back on the free list. + */ + aic7xxx_add_curscb_to_free_list(p); +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (aic7xxx_verbose > 0xffff) + printk(INFO_LEAD "Selection Timeout.\n", p->host_no, CTL_OF_SCB(scb)); +#endif + if (scb->flags & SCB_QUEUED_ABORT) + { + /* + * We know that this particular SCB had to be the queued abort since + * the disconnected SCB would have gotten a reconnect instead. + * What we need to do then is to let the command timeout again so + * we get a reset since this abort just failed. + */ + cmd->result = 0; + scb = NULL; + } + } + /* + * Keep the sequencer from trying to restart any selections + */ + aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ); + /* + * Make sure the data bits on the bus are released + * Don't do this on 7770 chipsets, it makes them give us + * a BRKADDRINT and kills the card. + */ + if( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI ) + aic_outb(p, 0, SCSIBUSL); + + /* + * Delay for the selection timeout delay period then stop the selection + */ + udelay(301); + aic_outb(p, CLRSELINGO, CLRSINT0); + /* + * Clear out all the interrupt status bits + */ + aic_outb(p, aic_inb(p, SIMODE1) & ~(ENREQINIT|ENBUSFREE), SIMODE1); + p->flags &= ~AHC_HANDLING_REQINITS; + aic_outb(p, CLRSELTIMEO | CLRBUSFREE, CLRSINT1); + aic_outb(p, CLRSCSIINT, CLRINT); + /* + * Restarting the sequencer will stop the selection and make sure devices + * are allowed to reselect in. + */ + restart_sequencer(p); + unpause_sequencer(p, TRUE); + } + else if (scb == NULL) + { + printk(WARN_LEAD "aic7xxx_isr - referenced scb not valid " + "during scsiint 0x%x scb(%d)\n" + " SIMODE0 0x%x, SIMODE1 0x%x, SSTAT0 0x%x, SEQADDR 0x%x\n", + p->host_no, -1, -1, -1, status, scb_index, aic_inb(p, SIMODE0), + aic_inb(p, SIMODE1), aic_inb(p, SSTAT0), + (aic_inb(p, SEQADDR1) << 8) | aic_inb(p, SEQADDR0)); + /* + * Turn off the interrupt and set status to zero, so that it + * falls through the rest of the SCSIINT code. + */ + aic_outb(p, status, CLRSINT1); + aic_outb(p, CLRSCSIINT, CLRINT); + unpause_sequencer(p, /* unpause always */ TRUE); + scb = NULL; + } + else if (status & SCSIPERR) + { + /* + * Determine the bus phase and queue an appropriate message. + */ + char *phase; + Scsi_Cmnd *cmd; + unsigned char mesg_out = MSG_NOOP; + unsigned char lastphase = aic_inb(p, LASTPHASE); + unsigned char sstat2 = aic_inb(p, SSTAT2); + + cmd = scb->cmd; + switch (lastphase) + { + case P_DATAOUT: + phase = "Data-Out"; + break; + case P_DATAIN: + phase = "Data-In"; + mesg_out = MSG_INITIATOR_DET_ERR; + break; + case P_COMMAND: + phase = "Command"; + break; + case P_MESGOUT: + phase = "Message-Out"; + break; + case P_STATUS: + phase = "Status"; + mesg_out = MSG_INITIATOR_DET_ERR; + break; + case P_MESGIN: + phase = "Message-In"; + mesg_out = MSG_PARITY_ERROR; + break; + default: + phase = "unknown"; + break; + } + + /* + * A parity error has occurred during a data + * transfer phase. Flag it and continue. + */ + if( (p->features & AHC_ULTRA3) && + (aic_inb(p, SCSIRATE) & AHC_SYNCRATE_CRC) && + (lastphase == P_DATAIN) ) + { + printk(WARN_LEAD "CRC error during %s phase.\n", + p->host_no, CTL_OF_SCB(scb), phase); + if(sstat2 & CRCVALERR) + { + printk(WARN_LEAD " CRC error in intermediate CRC packet.\n", + p->host_no, CTL_OF_SCB(scb)); + } + if(sstat2 & CRCENDERR) + { + printk(WARN_LEAD " CRC error in ending CRC packet.\n", + p->host_no, CTL_OF_SCB(scb)); + } + if(sstat2 & CRCREQERR) + { + printk(WARN_LEAD " Target incorrectly requested a CRC packet.\n", + p->host_no, CTL_OF_SCB(scb)); + } + if(sstat2 & DUAL_EDGE_ERROR) + { + printk(WARN_LEAD " Dual Edge transmission error.\n", + p->host_no, CTL_OF_SCB(scb)); + } + } + else if( (lastphase == P_MESGOUT) && + (scb->flags & SCB_MSGOUT_PPR) ) + { + /* + * As per the draft specs, any device capable of supporting any of + * the option values other than 0 are not allowed to reject the + * PPR message. Instead, they must negotiate out what they do + * support instead of rejecting our offering or else they cause + * a parity error during msg_out phase to signal that they don't + * like our settings. + */ + aic_dev = AIC_DEV(scb->cmd); + aic_dev->needppr = aic_dev->needppr_copy = 0; + aic7xxx_set_width(p, scb->cmd->device->id, scb->cmd->device->channel, scb->cmd->device->lun, + MSG_EXT_WDTR_BUS_8_BIT, + (AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE), + aic_dev); + aic7xxx_set_syncrate(p, NULL, scb->cmd->device->id, scb->cmd->device->channel, 0, 0, + 0, AHC_TRANS_ACTIVE|AHC_TRANS_CUR|AHC_TRANS_QUITE, + aic_dev); + aic_dev->goal.options = 0; + scb->flags &= ~SCB_MSGOUT_BITS; + if(aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "parity error during PPR message, reverting " + "to WDTR/SDTR\n", p->host_no, CTL_OF_SCB(scb)); + } + if ( aic_dev->goal.width ) + { + aic_dev->needwdtr = aic_dev->needwdtr_copy = 1; + } + if ( aic_dev->goal.offset ) + { + if( aic_dev->goal.period <= 9 ) + { + aic_dev->goal.period = 10; + } + aic_dev->needsdtr = aic_dev->needsdtr_copy = 1; + } + scb = NULL; + } + + /* + * We've set the hardware to assert ATN if we get a parity + * error on "in" phases, so all we need to do is stuff the + * message buffer with the appropriate message. "In" phases + * have set mesg_out to something other than MSG_NOP. + */ + if (mesg_out != MSG_NOOP) + { + aic_outb(p, mesg_out, MSG_OUT); + aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO); + scb = NULL; + } + aic_outb(p, CLRSCSIPERR, CLRSINT1); + aic_outb(p, CLRSCSIINT, CLRINT); + unpause_sequencer(p, /* unpause_always */ TRUE); + } + else if ( (status & REQINIT) && + (p->flags & AHC_HANDLING_REQINITS) ) + { +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (aic7xxx_verbose > 0xffff) + printk(INFO_LEAD "Handling REQINIT, SSTAT1=0x%x.\n", p->host_no, + CTL_OF_SCB(scb), aic_inb(p, SSTAT1)); +#endif + aic7xxx_handle_reqinit(p, scb); + return; + } + else + { + /* + * We don't know what's going on. Turn off the + * interrupt source and try to continue. + */ + if (aic7xxx_verbose & VERBOSE_SCSIINT) + printk(INFO_LEAD "Unknown SCSIINT status, SSTAT1(0x%x).\n", + p->host_no, -1, -1, -1, status); + aic_outb(p, status, CLRSINT1); + aic_outb(p, CLRSCSIINT, CLRINT); + unpause_sequencer(p, /* unpause always */ TRUE); + scb = NULL; + } + if (scb != NULL) + { + aic7xxx_done(p, scb); + } +} + +#ifdef AIC7XXX_VERBOSE_DEBUGGING +static void +aic7xxx_check_scbs(struct aic7xxx_host *p, char *buffer) +{ + unsigned char saved_scbptr, free_scbh, dis_scbh, wait_scbh, temp; + int i, bogus, lost; + static unsigned char scb_status[AIC7XXX_MAXSCB]; + +#define SCB_NO_LIST 0 +#define SCB_FREE_LIST 1 +#define SCB_WAITING_LIST 2 +#define SCB_DISCONNECTED_LIST 4 +#define SCB_CURRENTLY_ACTIVE 8 + + /* + * Note, these checks will fail on a regular basis once the machine moves + * beyond the bus scan phase. The problem is race conditions concerning + * the scbs and where they are linked in. When you have 30 or so commands + * outstanding on the bus, and run this twice with every interrupt, the + * chances get pretty good that you'll catch the sequencer with an SCB + * only partially linked in. Therefore, once we pass the scan phase + * of the bus, we really should disable this function. + */ + bogus = FALSE; + memset(&scb_status[0], 0, sizeof(scb_status)); + pause_sequencer(p); + saved_scbptr = aic_inb(p, SCBPTR); + if (saved_scbptr >= p->scb_data->maxhscbs) + { + printk("Bogus SCBPTR %d\n", saved_scbptr); + bogus = TRUE; + } + scb_status[saved_scbptr] = SCB_CURRENTLY_ACTIVE; + free_scbh = aic_inb(p, FREE_SCBH); + if ( (free_scbh != SCB_LIST_NULL) && + (free_scbh >= p->scb_data->maxhscbs) ) + { + printk("Bogus FREE_SCBH %d\n", free_scbh); + bogus = TRUE; + } + else + { + temp = free_scbh; + while( (temp != SCB_LIST_NULL) && (temp < p->scb_data->maxhscbs) ) + { + if(scb_status[temp] & 0x07) + { + printk("HSCB %d on multiple lists, status 0x%02x", temp, + scb_status[temp] | SCB_FREE_LIST); + bogus = TRUE; + } + scb_status[temp] |= SCB_FREE_LIST; + aic_outb(p, temp, SCBPTR); + temp = aic_inb(p, SCB_NEXT); + } + } + + dis_scbh = aic_inb(p, DISCONNECTED_SCBH); + if ( (dis_scbh != SCB_LIST_NULL) && + (dis_scbh >= p->scb_data->maxhscbs) ) + { + printk("Bogus DISCONNECTED_SCBH %d\n", dis_scbh); + bogus = TRUE; + } + else + { + temp = dis_scbh; + while( (temp != SCB_LIST_NULL) && (temp < p->scb_data->maxhscbs) ) + { + if(scb_status[temp] & 0x07) + { + printk("HSCB %d on multiple lists, status 0x%02x", temp, + scb_status[temp] | SCB_DISCONNECTED_LIST); + bogus = TRUE; + } + scb_status[temp] |= SCB_DISCONNECTED_LIST; + aic_outb(p, temp, SCBPTR); + temp = aic_inb(p, SCB_NEXT); + } + } + + wait_scbh = aic_inb(p, WAITING_SCBH); + if ( (wait_scbh != SCB_LIST_NULL) && + (wait_scbh >= p->scb_data->maxhscbs) ) + { + printk("Bogus WAITING_SCBH %d\n", wait_scbh); + bogus = TRUE; + } + else + { + temp = wait_scbh; + while( (temp != SCB_LIST_NULL) && (temp < p->scb_data->maxhscbs) ) + { + if(scb_status[temp] & 0x07) + { + printk("HSCB %d on multiple lists, status 0x%02x", temp, + scb_status[temp] | SCB_WAITING_LIST); + bogus = TRUE; + } + scb_status[temp] |= SCB_WAITING_LIST; + aic_outb(p, temp, SCBPTR); + temp = aic_inb(p, SCB_NEXT); + } + } + + lost=0; + for(i=0; i < p->scb_data->maxhscbs; i++) + { + aic_outb(p, i, SCBPTR); + temp = aic_inb(p, SCB_NEXT); + if ( ((temp != SCB_LIST_NULL) && + (temp >= p->scb_data->maxhscbs)) ) + { + printk("HSCB %d bad, SCB_NEXT invalid(%d).\n", i, temp); + bogus = TRUE; + } + if ( temp == i ) + { + printk("HSCB %d bad, SCB_NEXT points to self.\n", i); + bogus = TRUE; + } + if (scb_status[i] == 0) + lost++; + if (lost > 1) + { + printk("Too many lost scbs.\n"); + bogus=TRUE; + } + } + aic_outb(p, saved_scbptr, SCBPTR); + unpause_sequencer(p, FALSE); + if (bogus) + { + printk("Bogus parameters found in card SCB array structures.\n"); + printk("%s\n", buffer); + aic7xxx_panic_abort(p, NULL); + } + return; +} +#endif + + +/*+F************************************************************************* + * Function: + * aic7xxx_handle_command_completion_intr + * + * Description: + * SCSI command completion interrupt handler. + *-F*************************************************************************/ +static void +aic7xxx_handle_command_completion_intr(struct aic7xxx_host *p) +{ + struct aic7xxx_scb *scb = NULL; + struct aic_dev_data *aic_dev; + Scsi_Cmnd *cmd; + unsigned char scb_index, tindex; + +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if( (p->isr_count < 16) && (aic7xxx_verbose > 0xffff) ) + printk(INFO_LEAD "Command Complete Int.\n", p->host_no, -1, -1, -1); +#endif + + /* + * Read the INTSTAT location after clearing the CMDINT bit. This forces + * any posted PCI writes to flush to memory. Gerard Roudier suggested + * this fix to the possible race of clearing the CMDINT bit but not + * having all command bytes flushed onto the qoutfifo. + */ + aic_outb(p, CLRCMDINT, CLRINT); + aic_inb(p, INTSTAT); + /* + * The sequencer will continue running when it + * issues this interrupt. There may be >1 commands + * finished, so loop until we've processed them all. + */ + + while (p->qoutfifo[p->qoutfifonext] != SCB_LIST_NULL) + { + scb_index = p->qoutfifo[p->qoutfifonext]; + p->qoutfifo[p->qoutfifonext++] = SCB_LIST_NULL; + if ( scb_index >= p->scb_data->numscbs ) + { + printk(WARN_LEAD "CMDCMPLT with invalid SCB index %d\n", p->host_no, + -1, -1, -1, scb_index); + continue; + } + scb = p->scb_data->scb_array[scb_index]; + if (!(scb->flags & SCB_ACTIVE) || (scb->cmd == NULL)) + { + printk(WARN_LEAD "CMDCMPLT without command for SCB %d, SCB flags " + "0x%x, cmd 0x%lx\n", p->host_no, -1, -1, -1, scb_index, scb->flags, + (unsigned long) scb->cmd); + continue; + } + tindex = TARGET_INDEX(scb->cmd); + aic_dev = AIC_DEV(scb->cmd); + if (scb->flags & SCB_QUEUED_ABORT) + { + pause_sequencer(p); + if ( ((aic_inb(p, LASTPHASE) & PHASE_MASK) != P_BUSFREE) && + (aic_inb(p, SCB_TAG) == scb->hscb->tag) ) + { + unpause_sequencer(p, FALSE); + continue; + } + aic7xxx_reset_device(p, scb->cmd->device->id, scb->cmd->device->channel, + scb->cmd->device->lun, scb->hscb->tag); + scb->flags &= ~(SCB_QUEUED_FOR_DONE | SCB_RESET | SCB_ABORT | + SCB_QUEUED_ABORT); + unpause_sequencer(p, FALSE); + } + else if (scb->flags & SCB_ABORT) + { + /* + * We started to abort this, but it completed on us, let it + * through as successful + */ + scb->flags &= ~(SCB_ABORT|SCB_RESET); + } + else if (scb->flags & SCB_SENSE) + { + char *buffer = &scb->cmd->sense_buffer[0]; + + if (buffer[12] == 0x47 || buffer[12] == 0x54) + { + /* + * Signal that we need to re-negotiate things. + */ + aic_dev->needppr = aic_dev->needppr_copy; + aic_dev->needsdtr = aic_dev->needsdtr_copy; + aic_dev->needwdtr = aic_dev->needwdtr_copy; + } + } + cmd = scb->cmd; + if (scb->hscb->residual_SG_segment_count != 0) + { + aic7xxx_calculate_residual(p, scb); + } + cmd->result |= (aic7xxx_error(cmd) << 16); + aic7xxx_done(p, scb); + } +} + +/*+F************************************************************************* + * Function: + * aic7xxx_isr + * + * Description: + * SCSI controller interrupt handler. + *-F*************************************************************************/ +static void +aic7xxx_isr(int irq, void *dev_id, struct pt_regs *regs) +{ + struct aic7xxx_host *p; + unsigned char intstat; + + p = (struct aic7xxx_host *)dev_id; + + /* + * Just a few sanity checks. Make sure that we have an int pending. + * Also, if PCI, then we are going to check for a PCI bus error status + * should we get too many spurious interrupts. + */ + if (!((intstat = aic_inb(p, INTSTAT)) & INT_PEND)) + { +#ifdef CONFIG_PCI + if ( (p->chip & AHC_PCI) && (p->spurious_int > 500) && + !(p->flags & AHC_HANDLING_REQINITS) ) + { + if ( aic_inb(p, ERROR) & PCIERRSTAT ) + { + aic7xxx_pci_intr(p); + } + p->spurious_int = 0; + } + else if ( !(p->flags & AHC_HANDLING_REQINITS) ) + { + p->spurious_int++; + } +#endif + return; + } + + p->spurious_int = 0; + + /* + * Keep track of interrupts for /proc/scsi + */ + p->isr_count++; + +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if ( (p->isr_count < 16) && (aic7xxx_verbose > 0xffff) && + (aic7xxx_panic_on_abort) && (p->flags & AHC_PAGESCBS) ) + aic7xxx_check_scbs(p, "Bogus settings at start of interrupt."); +#endif + + /* + * Handle all the interrupt sources - especially for SCSI + * interrupts, we won't get a second chance at them. + */ + if (intstat & CMDCMPLT) + { + aic7xxx_handle_command_completion_intr(p); + } + + if (intstat & BRKADRINT) + { + int i; + unsigned char errno = aic_inb(p, ERROR); + + printk(KERN_ERR "(scsi%d) BRKADRINT error(0x%x):\n", p->host_no, errno); + for (i = 0; i < ARRAY_SIZE(hard_error); i++) + { + if (errno & hard_error[i].errno) + { + printk(KERN_ERR " %s\n", hard_error[i].errmesg); + } + } + printk(KERN_ERR "(scsi%d) SEQADDR=0x%x\n", p->host_no, + (((aic_inb(p, SEQADDR1) << 8) & 0x100) | aic_inb(p, SEQADDR0))); + if (aic7xxx_panic_on_abort) + aic7xxx_panic_abort(p, NULL); +#ifdef CONFIG_PCI + if (errno & PCIERRSTAT) + aic7xxx_pci_intr(p); +#endif + if (errno & (SQPARERR | ILLOPCODE | ILLSADDR)) + { + panic("aic7xxx: unrecoverable BRKADRINT.\n"); + } + if (errno & ILLHADDR) + { + printk(KERN_ERR "(scsi%d) BUG! Driver accessed chip without first " + "pausing controller!\n", p->host_no); + } +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (errno & DPARERR) + { + if (aic_inb(p, DMAPARAMS) & DIRECTION) + printk("(scsi%d) while DMAing SCB from host to card.\n", p->host_no); + else + printk("(scsi%d) while DMAing SCB from card to host.\n", p->host_no); + } +#endif + aic_outb(p, CLRPARERR | CLRBRKADRINT, CLRINT); + unpause_sequencer(p, FALSE); + } + + if (intstat & SEQINT) + { + /* + * Read the CCSCBCTL register to work around a bug in the Ultra2 cards + */ + if(p->features & AHC_ULTRA2) + { + aic_inb(p, CCSCBCTL); + } + aic7xxx_handle_seqint(p, intstat); + } + + if (intstat & SCSIINT) + { + aic7xxx_handle_scsiint(p, intstat); + } + +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if ( (p->isr_count < 16) && (aic7xxx_verbose > 0xffff) && + (aic7xxx_panic_on_abort) && (p->flags & AHC_PAGESCBS) ) + aic7xxx_check_scbs(p, "Bogus settings at end of interrupt."); +#endif + +} + +/*+F************************************************************************* + * Function: + * do_aic7xxx_isr + * + * Description: + * This is a gross hack to solve a problem in linux kernels 2.1.85 and + * above. Please, children, do not try this at home, and if you ever see + * anything like it, please inform the Gross Hack Police immediately + *-F*************************************************************************/ +static irqreturn_t +do_aic7xxx_isr(int irq, void *dev_id, struct pt_regs *regs) +{ + unsigned long cpu_flags; + struct aic7xxx_host *p; + + p = (struct aic7xxx_host *)dev_id; + if(!p) + return IRQ_NONE; + spin_lock_irqsave(p->host->host_lock, cpu_flags); + p->flags |= AHC_IN_ISR; + do + { + aic7xxx_isr(irq, dev_id, regs); + } while ( (aic_inb(p, INTSTAT) & INT_PEND) ); + aic7xxx_done_cmds_complete(p); + aic7xxx_run_waiting_queues(p); + p->flags &= ~AHC_IN_ISR; + spin_unlock_irqrestore(p->host->host_lock, cpu_flags); + + return IRQ_HANDLED; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_init_transinfo + * + * Description: + * Set up the initial aic_dev values from the BIOS settings and from + * INQUIRY results + *-F*************************************************************************/ +static void +aic7xxx_init_transinfo(struct aic7xxx_host *p, struct aic_dev_data *aic_dev) +{ + Scsi_Device *sdpnt = aic_dev->SDptr; + unsigned char tindex; + + tindex = sdpnt->id | (sdpnt->channel << 3); + if (!(aic_dev->flags & DEVICE_DTR_SCANNED)) + { + aic_dev->flags |= DEVICE_DTR_SCANNED; + + if ( sdpnt->wdtr && (p->features & AHC_WIDE) ) + { + aic_dev->needwdtr = aic_dev->needwdtr_copy = 1; + aic_dev->goal.width = p->user[tindex].width; + } + else + { + aic_dev->needwdtr = aic_dev->needwdtr_copy = 0; + pause_sequencer(p); + aic7xxx_set_width(p, sdpnt->id, sdpnt->channel, sdpnt->lun, + MSG_EXT_WDTR_BUS_8_BIT, (AHC_TRANS_ACTIVE | + AHC_TRANS_GOAL | + AHC_TRANS_CUR), aic_dev ); + unpause_sequencer(p, FALSE); + } + if ( sdpnt->sdtr && p->user[tindex].offset ) + { + aic_dev->goal.period = p->user[tindex].period; + aic_dev->goal.options = p->user[tindex].options; + if (p->features & AHC_ULTRA2) + aic_dev->goal.offset = MAX_OFFSET_ULTRA2; + else if (aic_dev->goal.width == MSG_EXT_WDTR_BUS_16_BIT) + aic_dev->goal.offset = MAX_OFFSET_16BIT; + else + aic_dev->goal.offset = MAX_OFFSET_8BIT; + if ( sdpnt->ppr && p->user[tindex].period <= 9 && + p->user[tindex].options ) + { + aic_dev->needppr = aic_dev->needppr_copy = 1; + aic_dev->needsdtr = aic_dev->needsdtr_copy = 0; + aic_dev->needwdtr = aic_dev->needwdtr_copy = 0; + aic_dev->flags |= DEVICE_SCSI_3; + } + else + { + aic_dev->needsdtr = aic_dev->needsdtr_copy = 1; + aic_dev->goal.period = max_t(unsigned char, 10, aic_dev->goal.period); + aic_dev->goal.options = 0; + } + } + else + { + aic_dev->needsdtr = aic_dev->needsdtr_copy = 0; + aic_dev->goal.period = 255; + aic_dev->goal.offset = 0; + aic_dev->goal.options = 0; + } + aic_dev->flags |= DEVICE_PRINT_DTR; + } +} + +/*+F************************************************************************* + * Function: + * aic7xxx_slave_alloc + * + * Description: + * Set up the initial aic_dev struct pointers + *-F*************************************************************************/ +static int +aic7xxx_slave_alloc(Scsi_Device *SDptr) +{ + struct aic7xxx_host *p = (struct aic7xxx_host *)SDptr->host->hostdata; + struct aic_dev_data *aic_dev; + + aic_dev = kmalloc(sizeof(struct aic_dev_data), GFP_ATOMIC | GFP_KERNEL); + if(!aic_dev) + return 1; + /* + * Check to see if channel was scanned. + */ + + if (!(p->flags & AHC_A_SCANNED) && (SDptr->channel == 0)) + { + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(INFO_LEAD "Scanning channel for devices.\n", + p->host_no, 0, -1, -1); + p->flags |= AHC_A_SCANNED; + } + else + { + if (!(p->flags & AHC_B_SCANNED) && (SDptr->channel == 1)) + { + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(INFO_LEAD "Scanning channel for devices.\n", + p->host_no, 1, -1, -1); + p->flags |= AHC_B_SCANNED; + } + } + + memset(aic_dev, 0, sizeof(struct aic_dev_data)); + SDptr->hostdata = aic_dev; + aic_dev->SDptr = SDptr; + aic_dev->max_q_depth = 1; + aic_dev->temp_q_depth = 1; + scbq_init(&aic_dev->delayed_scbs); + INIT_LIST_HEAD(&aic_dev->list); + list_add_tail(&aic_dev->list, &p->aic_devs); + return 0; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_device_queue_depth + * + * Description: + * Determines the queue depth for a given device. There are two ways + * a queue depth can be obtained for a tagged queueing device. One + * way is the default queue depth which is determined by whether + * aic7xxx_default_queue_depth. The other is by the aic7xxx_tag_info + * array. + * + * If tagged queueing isn't supported on the device, then we set the + * depth to p->host->hostt->cmd_per_lun for internal driver queueing. + * as the default queue depth. Otherwise, we use either 4 or 8 as the + * default queue depth (dependent on the number of hardware SCBs). + * The other way we determine queue depth is through the use of the + * aic7xxx_tag_info array which is enabled by defining + * AIC7XXX_TAGGED_QUEUEING_BY_DEVICE. This array can be initialized + * with queue depths for individual devices. It also allows tagged + * queueing to be [en|dis]abled for a specific adapter. + *-F*************************************************************************/ +static void +aic7xxx_device_queue_depth(struct aic7xxx_host *p, Scsi_Device *device) +{ + int tag_enabled = FALSE; + struct aic_dev_data *aic_dev = device->hostdata; + unsigned char tindex; + + tindex = device->id | (device->channel << 3); + + if (device->simple_tags) + return; // We've already enabled this device + + if (device->tagged_supported) + { + tag_enabled = TRUE; + + if (!(p->discenable & (1 << tindex))) + { + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + printk(INFO_LEAD "Disconnection disabled, unable to " + "enable tagged queueing.\n", + p->host_no, device->channel, device->id, device->lun); + tag_enabled = FALSE; + } + else + { + if (p->instance >= ARRAY_SIZE(aic7xxx_tag_info)) + { + static int print_warning = TRUE; + if(print_warning) + { + printk(KERN_INFO "aic7xxx: WARNING, insufficient tag_info instances for" + " installed controllers.\n"); + printk(KERN_INFO "aic7xxx: Please update the aic7xxx_tag_info array in" + " the aic7xxx.c source file.\n"); + print_warning = FALSE; + } + aic_dev->max_q_depth = aic_dev->temp_q_depth = + aic7xxx_default_queue_depth; + } + else + { + + if (aic7xxx_tag_info[p->instance].tag_commands[tindex] == 255) + { + tag_enabled = FALSE; + } + else if (aic7xxx_tag_info[p->instance].tag_commands[tindex] == 0) + { + aic_dev->max_q_depth = aic_dev->temp_q_depth = + aic7xxx_default_queue_depth; + } + else + { + aic_dev->max_q_depth = aic_dev->temp_q_depth = + aic7xxx_tag_info[p->instance].tag_commands[tindex]; + } + } + } + } + if (tag_enabled) + { + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Tagged queuing enabled, queue depth %d.\n", + p->host_no, device->channel, device->id, + device->lun, aic_dev->max_q_depth); + } + scsi_adjust_queue_depth(device, MSG_ORDERED_TAG, aic_dev->max_q_depth); + } + else + { + if (aic7xxx_verbose & VERBOSE_NEGOTIATION2) + { + printk(INFO_LEAD "Tagged queuing disabled, queue depth %d.\n", + p->host_no, device->channel, device->id, + device->lun, device->host->cmd_per_lun); + } + scsi_adjust_queue_depth(device, 0, device->host->cmd_per_lun); + } + return; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_slave_destroy + * + * Description: + * prepare for this device to go away + *-F*************************************************************************/ +static void +aic7xxx_slave_destroy(Scsi_Device *SDptr) +{ + struct aic_dev_data *aic_dev = SDptr->hostdata; + + list_del(&aic_dev->list); + SDptr->hostdata = NULL; + kfree(aic_dev); + return; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_slave_configure + * + * Description: + * Configure the device we are attaching to the controller. This is + * where we get to do things like scan the INQUIRY data, set queue + * depths, allocate command structs, etc. + *-F*************************************************************************/ +static int +aic7xxx_slave_configure(Scsi_Device *SDptr) +{ + struct aic7xxx_host *p = (struct aic7xxx_host *) SDptr->host->hostdata; + struct aic_dev_data *aic_dev; + int scbnum; + + aic_dev = (struct aic_dev_data *)SDptr->hostdata; + + aic7xxx_init_transinfo(p, aic_dev); + aic7xxx_device_queue_depth(p, SDptr); + if(list_empty(&aic_dev->list)) + list_add_tail(&aic_dev->list, &p->aic_devs); + + scbnum = 0; + list_for_each_entry(aic_dev, &p->aic_devs, list) { + scbnum += aic_dev->max_q_depth; + } + while (scbnum > p->scb_data->numscbs) + { + /* + * Pre-allocate the needed SCBs to get around the possibility of having + * to allocate some when memory is more or less exhausted and we need + * the SCB in order to perform a swap operation (possible deadlock) + */ + if ( aic7xxx_allocate_scb(p) == 0 ) + break; + } + + + return(0); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_probe + * + * Description: + * Probing for EISA boards: it looks like the first two bytes + * are a manufacturer code - three characters, five bits each: + * + * BYTE 0 BYTE 1 BYTE 2 BYTE 3 + * ?1111122 22233333 PPPPPPPP RRRRRRRR + * + * The characters are baselined off ASCII '@', so add that value + * to each to get the real ASCII code for it. The next two bytes + * appear to be a product and revision number, probably vendor- + * specific. This is what is being searched for at each port, + * and what should probably correspond to the ID= field in the + * ECU's .cfg file for the card - if your card is not detected, + * make sure your signature is listed in the array. + * + * The fourth byte's lowest bit seems to be an enabled/disabled + * flag (rest of the bits are reserved?). + * + * NOTE: This function is only needed on Intel and Alpha platforms, + * the other platforms we support don't have EISA/VLB busses. So, + * we #ifdef this entire function to avoid compiler warnings about + * an unused function. + *-F*************************************************************************/ +#if defined(__i386__) || defined(__alpha__) +static int +aic7xxx_probe(int slot, int base, ahc_flag_type *flags) +{ + int i; + unsigned char buf[4]; + + static struct { + int n; + unsigned char signature[sizeof(buf)]; + ahc_chip type; + int bios_disabled; + } AIC7xxx[] = { + { 4, { 0x04, 0x90, 0x77, 0x70 }, + AHC_AIC7770|AHC_EISA, FALSE }, /* mb 7770 */ + { 4, { 0x04, 0x90, 0x77, 0x71 }, + AHC_AIC7770|AHC_EISA, FALSE }, /* host adapter 274x */ + { 4, { 0x04, 0x90, 0x77, 0x56 }, + AHC_AIC7770|AHC_VL, FALSE }, /* 284x BIOS enabled */ + { 4, { 0x04, 0x90, 0x77, 0x57 }, + AHC_AIC7770|AHC_VL, TRUE } /* 284x BIOS disabled */ + }; + + /* + * The VL-bus cards need to be primed by + * writing before a signature check. + */ + for (i = 0; i < sizeof(buf); i++) + { + outb(0x80 + i, base); + buf[i] = inb(base + i); + } + + for (i = 0; i < ARRAY_SIZE(AIC7xxx); i++) + { + /* + * Signature match on enabled card? + */ + if (!memcmp(buf, AIC7xxx[i].signature, AIC7xxx[i].n)) + { + if (inb(base + 4) & 1) + { + if (AIC7xxx[i].bios_disabled) + { + *flags |= AHC_USEDEFAULTS; + } + else + { + *flags |= AHC_BIOS_ENABLED; + } + return (i); + } + + printk("aic7xxx: <Adaptec 7770 SCSI Host Adapter> " + "disabled at slot %d, ignored.\n", slot); + } + } + + return (-1); +} +#endif /* (__i386__) || (__alpha__) */ + + +/*+F************************************************************************* + * Function: + * read_2840_seeprom + * + * Description: + * Reads the 2840 serial EEPROM and returns 1 if successful and 0 if + * not successful. + * + * See read_seeprom (for the 2940) for the instruction set of the 93C46 + * chip. + * + * The 2840 interface to the 93C46 serial EEPROM is through the + * STATUS_2840 and SEECTL_2840 registers. The CS_2840, CK_2840, and + * DO_2840 bits of the SEECTL_2840 register are connected to the chip + * select, clock, and data out lines respectively of the serial EEPROM. + * The DI_2840 bit of the STATUS_2840 is connected to the data in line + * of the serial EEPROM. The EEPROM_TF bit of STATUS_2840 register is + * useful in that it gives us an 800 nsec timer. After a read from the + * SEECTL_2840 register the timing flag is cleared and goes high 800 nsec + * later. + *-F*************************************************************************/ +static int +read_284x_seeprom(struct aic7xxx_host *p, struct seeprom_config *sc) +{ + int i = 0, k = 0; + unsigned char temp; + unsigned short checksum = 0; + unsigned short *seeprom = (unsigned short *) sc; + struct seeprom_cmd { + unsigned char len; + unsigned char bits[3]; + }; + struct seeprom_cmd seeprom_read = {3, {1, 1, 0}}; + +#define CLOCK_PULSE(p) \ + while ((aic_inb(p, STATUS_2840) & EEPROM_TF) == 0) \ + { \ + ; /* Do nothing */ \ + } \ + (void) aic_inb(p, SEECTL_2840); + + /* + * Read the first 32 registers of the seeprom. For the 2840, + * the 93C46 SEEPROM is a 1024-bit device with 64 16-bit registers + * but only the first 32 are used by Adaptec BIOS. The loop + * will range from 0 to 31. + */ + for (k = 0; k < (sizeof(*sc) / 2); k++) + { + /* + * Send chip select for one clock cycle. + */ + aic_outb(p, CK_2840 | CS_2840, SEECTL_2840); + CLOCK_PULSE(p); + + /* + * Now we're ready to send the read command followed by the + * address of the 16-bit register we want to read. + */ + for (i = 0; i < seeprom_read.len; i++) + { + temp = CS_2840 | seeprom_read.bits[i]; + aic_outb(p, temp, SEECTL_2840); + CLOCK_PULSE(p); + temp = temp ^ CK_2840; + aic_outb(p, temp, SEECTL_2840); + CLOCK_PULSE(p); + } + /* + * Send the 6 bit address (MSB first, LSB last). + */ + for (i = 5; i >= 0; i--) + { + temp = k; + temp = (temp >> i) & 1; /* Mask out all but lower bit. */ + temp = CS_2840 | temp; + aic_outb(p, temp, SEECTL_2840); + CLOCK_PULSE(p); + temp = temp ^ CK_2840; + aic_outb(p, temp, SEECTL_2840); + CLOCK_PULSE(p); + } + + /* + * Now read the 16 bit register. An initial 0 precedes the + * register contents which begins with bit 15 (MSB) and ends + * with bit 0 (LSB). The initial 0 will be shifted off the + * top of our word as we let the loop run from 0 to 16. + */ + for (i = 0; i <= 16; i++) + { + temp = CS_2840; + aic_outb(p, temp, SEECTL_2840); + CLOCK_PULSE(p); + temp = temp ^ CK_2840; + seeprom[k] = (seeprom[k] << 1) | (aic_inb(p, STATUS_2840) & DI_2840); + aic_outb(p, temp, SEECTL_2840); + CLOCK_PULSE(p); + } + /* + * The serial EEPROM has a checksum in the last word. Keep a + * running checksum for all words read except for the last + * word. We'll verify the checksum after all words have been + * read. + */ + if (k < (sizeof(*sc) / 2) - 1) + { + checksum = checksum + seeprom[k]; + } + + /* + * Reset the chip select for the next command cycle. + */ + aic_outb(p, 0, SEECTL_2840); + CLOCK_PULSE(p); + aic_outb(p, CK_2840, SEECTL_2840); + CLOCK_PULSE(p); + aic_outb(p, 0, SEECTL_2840); + CLOCK_PULSE(p); + } + +#if 0 + printk("Computed checksum 0x%x, checksum read 0x%x\n", checksum, sc->checksum); + printk("Serial EEPROM:"); + for (k = 0; k < (sizeof(*sc) / 2); k++) + { + if (((k % 8) == 0) && (k != 0)) + { + printk("\n "); + } + printk(" 0x%x", seeprom[k]); + } + printk("\n"); +#endif + + if (checksum != sc->checksum) + { + printk("aic7xxx: SEEPROM checksum error, ignoring SEEPROM settings.\n"); + return (0); + } + + return (1); +#undef CLOCK_PULSE +} + +#define CLOCK_PULSE(p) \ + do { \ + int limit = 0; \ + do { \ + mb(); \ + pause_sequencer(p); /* This is just to generate some PCI */ \ + /* traffic so the PCI read is flushed */ \ + /* it shouldn't be needed, but some */ \ + /* chipsets do indeed appear to need */ \ + /* something to force PCI reads to get */ \ + /* flushed */ \ + udelay(1); /* Do nothing */ \ + } while (((aic_inb(p, SEECTL) & SEERDY) == 0) && (++limit < 1000)); \ + } while(0) + +/*+F************************************************************************* + * Function: + * acquire_seeprom + * + * Description: + * Acquires access to the memory port on PCI controllers. + *-F*************************************************************************/ +static int +acquire_seeprom(struct aic7xxx_host *p) +{ + + /* + * Request access of the memory port. When access is + * granted, SEERDY will go high. We use a 1 second + * timeout which should be near 1 second more than + * is needed. Reason: after the 7870 chip reset, there + * should be no contention. + */ + aic_outb(p, SEEMS, SEECTL); + CLOCK_PULSE(p); + if ((aic_inb(p, SEECTL) & SEERDY) == 0) + { + aic_outb(p, 0, SEECTL); + return (0); + } + return (1); +} + +/*+F************************************************************************* + * Function: + * release_seeprom + * + * Description: + * Releases access to the memory port on PCI controllers. + *-F*************************************************************************/ +static void +release_seeprom(struct aic7xxx_host *p) +{ + /* + * Make sure the SEEPROM is ready before we release it. + */ + CLOCK_PULSE(p); + aic_outb(p, 0, SEECTL); +} + +/*+F************************************************************************* + * Function: + * read_seeprom + * + * Description: + * Reads the serial EEPROM and returns 1 if successful and 0 if + * not successful. + * + * The instruction set of the 93C46/56/66 chips is as follows: + * + * Start OP + * Function Bit Code Address Data Description + * ------------------------------------------------------------------- + * READ 1 10 A5 - A0 Reads data stored in memory, + * starting at specified address + * EWEN 1 00 11XXXX Write enable must precede + * all programming modes + * ERASE 1 11 A5 - A0 Erase register A5A4A3A2A1A0 + * WRITE 1 01 A5 - A0 D15 - D0 Writes register + * ERAL 1 00 10XXXX Erase all registers + * WRAL 1 00 01XXXX D15 - D0 Writes to all registers + * EWDS 1 00 00XXXX Disables all programming + * instructions + * *Note: A value of X for address is a don't care condition. + * *Note: The 93C56 and 93C66 have 8 address bits. + * + * + * The 93C46 has a four wire interface: clock, chip select, data in, and + * data out. In order to perform one of the above functions, you need + * to enable the chip select for a clock period (typically a minimum of + * 1 usec, with the clock high and low a minimum of 750 and 250 nsec + * respectively. While the chip select remains high, you can clock in + * the instructions (above) starting with the start bit, followed by the + * OP code, Address, and Data (if needed). For the READ instruction, the + * requested 16-bit register contents is read from the data out line but + * is preceded by an initial zero (leading 0, followed by 16-bits, MSB + * first). The clock cycling from low to high initiates the next data + * bit to be sent from the chip. + * + * The 78xx interface to the 93C46 serial EEPROM is through the SEECTL + * register. After successful arbitration for the memory port, the + * SEECS bit of the SEECTL register is connected to the chip select. + * The SEECK, SEEDO, and SEEDI are connected to the clock, data out, + * and data in lines respectively. The SEERDY bit of SEECTL is useful + * in that it gives us an 800 nsec timer. After a write to the SEECTL + * register, the SEERDY goes high 800 nsec later. The one exception + * to this is when we first request access to the memory port. The + * SEERDY goes high to signify that access has been granted and, for + * this case, has no implied timing. + *-F*************************************************************************/ +static int +read_seeprom(struct aic7xxx_host *p, int offset, + unsigned short *scarray, unsigned int len, seeprom_chip_type chip) +{ + int i = 0, k; + unsigned char temp; + unsigned short checksum = 0; + struct seeprom_cmd { + unsigned char len; + unsigned char bits[3]; + }; + struct seeprom_cmd seeprom_read = {3, {1, 1, 0}}; + + /* + * Request access of the memory port. + */ + if (acquire_seeprom(p) == 0) + { + return (0); + } + + /* + * Read 'len' registers of the seeprom. For the 7870, the 93C46 + * SEEPROM is a 1024-bit device with 64 16-bit registers but only + * the first 32 are used by Adaptec BIOS. Some adapters use the + * 93C56 SEEPROM which is a 2048-bit device. The loop will range + * from 0 to 'len' - 1. + */ + for (k = 0; k < len; k++) + { + /* + * Send chip select for one clock cycle. + */ + aic_outb(p, SEEMS | SEECK | SEECS, SEECTL); + CLOCK_PULSE(p); + + /* + * Now we're ready to send the read command followed by the + * address of the 16-bit register we want to read. + */ + for (i = 0; i < seeprom_read.len; i++) + { + temp = SEEMS | SEECS | (seeprom_read.bits[i] << 1); + aic_outb(p, temp, SEECTL); + CLOCK_PULSE(p); + temp = temp ^ SEECK; + aic_outb(p, temp, SEECTL); + CLOCK_PULSE(p); + } + /* + * Send the 6 or 8 bit address (MSB first, LSB last). + */ + for (i = ((int) chip - 1); i >= 0; i--) + { + temp = k + offset; + temp = (temp >> i) & 1; /* Mask out all but lower bit. */ + temp = SEEMS | SEECS | (temp << 1); + aic_outb(p, temp, SEECTL); + CLOCK_PULSE(p); + temp = temp ^ SEECK; + aic_outb(p, temp, SEECTL); + CLOCK_PULSE(p); + } + + /* + * Now read the 16 bit register. An initial 0 precedes the + * register contents which begins with bit 15 (MSB) and ends + * with bit 0 (LSB). The initial 0 will be shifted off the + * top of our word as we let the loop run from 0 to 16. + */ + for (i = 0; i <= 16; i++) + { + temp = SEEMS | SEECS; + aic_outb(p, temp, SEECTL); + CLOCK_PULSE(p); + temp = temp ^ SEECK; + scarray[k] = (scarray[k] << 1) | (aic_inb(p, SEECTL) & SEEDI); + aic_outb(p, temp, SEECTL); + CLOCK_PULSE(p); + } + + /* + * The serial EEPROM should have a checksum in the last word. + * Keep a running checksum for all words read except for the + * last word. We'll verify the checksum after all words have + * been read. + */ + if (k < (len - 1)) + { + checksum = checksum + scarray[k]; + } + + /* + * Reset the chip select for the next command cycle. + */ + aic_outb(p, SEEMS, SEECTL); + CLOCK_PULSE(p); + aic_outb(p, SEEMS | SEECK, SEECTL); + CLOCK_PULSE(p); + aic_outb(p, SEEMS, SEECTL); + CLOCK_PULSE(p); + } + + /* + * Release access to the memory port and the serial EEPROM. + */ + release_seeprom(p); + +#if 0 + printk("Computed checksum 0x%x, checksum read 0x%x\n", + checksum, scarray[len - 1]); + printk("Serial EEPROM:"); + for (k = 0; k < len; k++) + { + if (((k % 8) == 0) && (k != 0)) + { + printk("\n "); + } + printk(" 0x%x", scarray[k]); + } + printk("\n"); +#endif + if ( (checksum != scarray[len - 1]) || (checksum == 0) ) + { + return (0); + } + + return (1); +} + +/*+F************************************************************************* + * Function: + * read_brdctl + * + * Description: + * Reads the BRDCTL register. + *-F*************************************************************************/ +static unsigned char +read_brdctl(struct aic7xxx_host *p) +{ + unsigned char brdctl, value; + + /* + * Make sure the SEEPROM is ready before we access it + */ + CLOCK_PULSE(p); + if (p->features & AHC_ULTRA2) + { + brdctl = BRDRW_ULTRA2; + aic_outb(p, brdctl, BRDCTL); + CLOCK_PULSE(p); + value = aic_inb(p, BRDCTL); + CLOCK_PULSE(p); + return(value); + } + brdctl = BRDRW; + if ( !((p->chip & AHC_CHIPID_MASK) == AHC_AIC7895) || + (p->flags & AHC_CHNLB) ) + { + brdctl |= BRDCS; + } + aic_outb(p, brdctl, BRDCTL); + CLOCK_PULSE(p); + value = aic_inb(p, BRDCTL); + CLOCK_PULSE(p); + aic_outb(p, 0, BRDCTL); + CLOCK_PULSE(p); + return (value); +} + +/*+F************************************************************************* + * Function: + * write_brdctl + * + * Description: + * Writes a value to the BRDCTL register. + *-F*************************************************************************/ +static void +write_brdctl(struct aic7xxx_host *p, unsigned char value) +{ + unsigned char brdctl; + + /* + * Make sure the SEEPROM is ready before we access it + */ + CLOCK_PULSE(p); + if (p->features & AHC_ULTRA2) + { + brdctl = value; + aic_outb(p, brdctl, BRDCTL); + CLOCK_PULSE(p); + brdctl |= BRDSTB_ULTRA2; + aic_outb(p, brdctl, BRDCTL); + CLOCK_PULSE(p); + brdctl &= ~BRDSTB_ULTRA2; + aic_outb(p, brdctl, BRDCTL); + CLOCK_PULSE(p); + read_brdctl(p); + CLOCK_PULSE(p); + } + else + { + brdctl = BRDSTB; + if ( !((p->chip & AHC_CHIPID_MASK) == AHC_AIC7895) || + (p->flags & AHC_CHNLB) ) + { + brdctl |= BRDCS; + } + brdctl = BRDSTB | BRDCS; + aic_outb(p, brdctl, BRDCTL); + CLOCK_PULSE(p); + brdctl |= value; + aic_outb(p, brdctl, BRDCTL); + CLOCK_PULSE(p); + brdctl &= ~BRDSTB; + aic_outb(p, brdctl, BRDCTL); + CLOCK_PULSE(p); + brdctl &= ~BRDCS; + aic_outb(p, brdctl, BRDCTL); + CLOCK_PULSE(p); + } +} + +/*+F************************************************************************* + * Function: + * aic785x_cable_detect + * + * Description: + * Detect the cables that are present on aic785x class controller chips + *-F*************************************************************************/ +static void +aic785x_cable_detect(struct aic7xxx_host *p, int *int_50, + int *ext_present, int *eeprom) +{ + unsigned char brdctl; + + aic_outb(p, BRDRW | BRDCS, BRDCTL); + CLOCK_PULSE(p); + aic_outb(p, 0, BRDCTL); + CLOCK_PULSE(p); + brdctl = aic_inb(p, BRDCTL); + CLOCK_PULSE(p); + *int_50 = !(brdctl & BRDDAT5); + *ext_present = !(brdctl & BRDDAT6); + *eeprom = (aic_inb(p, SPIOCAP) & EEPROM); +} + +#undef CLOCK_PULSE + +/*+F************************************************************************* + * Function: + * aic2940_uwpro_cable_detect + * + * Description: + * Detect the cables that are present on the 2940-UWPro cards + * + * NOTE: This function assumes the SEEPROM will have already been acquired + * prior to invocation of this function. + *-F*************************************************************************/ +static void +aic2940_uwpro_wide_cable_detect(struct aic7xxx_host *p, int *int_68, + int *ext_68, int *eeprom) +{ + unsigned char brdctl; + + /* + * First read the status of our cables. Set the rom bank to + * 0 since the bank setting serves as a multiplexor for the + * cable detection logic. BRDDAT5 controls the bank switch. + */ + write_brdctl(p, 0); + + /* + * Now we read the state of the internal 68 connector. BRDDAT6 + * is don't care, BRDDAT7 is internal 68. The cable is + * present if the bit is 0 + */ + brdctl = read_brdctl(p); + *int_68 = !(brdctl & BRDDAT7); + + /* + * Set the bank bit in brdctl and then read the external cable state + * and the EEPROM status + */ + write_brdctl(p, BRDDAT5); + brdctl = read_brdctl(p); + + *ext_68 = !(brdctl & BRDDAT6); + *eeprom = !(brdctl & BRDDAT7); + + /* + * We're done, the calling function will release the SEEPROM for us + */ +} + +/*+F************************************************************************* + * Function: + * aic787x_cable_detect + * + * Description: + * Detect the cables that are present on aic787x class controller chips + * + * NOTE: This function assumes the SEEPROM will have already been acquired + * prior to invocation of this function. + *-F*************************************************************************/ +static void +aic787x_cable_detect(struct aic7xxx_host *p, int *int_50, int *int_68, + int *ext_present, int *eeprom) +{ + unsigned char brdctl; + + /* + * First read the status of our cables. Set the rom bank to + * 0 since the bank setting serves as a multiplexor for the + * cable detection logic. BRDDAT5 controls the bank switch. + */ + write_brdctl(p, 0); + + /* + * Now we read the state of the two internal connectors. BRDDAT6 + * is internal 50, BRDDAT7 is internal 68. For each, the cable is + * present if the bit is 0 + */ + brdctl = read_brdctl(p); + *int_50 = !(brdctl & BRDDAT6); + *int_68 = !(brdctl & BRDDAT7); + + /* + * Set the bank bit in brdctl and then read the external cable state + * and the EEPROM status + */ + write_brdctl(p, BRDDAT5); + brdctl = read_brdctl(p); + + *ext_present = !(brdctl & BRDDAT6); + *eeprom = !(brdctl & BRDDAT7); + + /* + * We're done, the calling function will release the SEEPROM for us + */ +} + +/*+F************************************************************************* + * Function: + * aic787x_ultra2_term_detect + * + * Description: + * Detect the termination settings present on ultra2 class controllers + * + * NOTE: This function assumes the SEEPROM will have already been acquired + * prior to invocation of this function. + *-F*************************************************************************/ +static void +aic7xxx_ultra2_term_detect(struct aic7xxx_host *p, int *enableSE_low, + int *enableSE_high, int *enableLVD_low, + int *enableLVD_high, int *eprom_present) +{ + unsigned char brdctl; + + brdctl = read_brdctl(p); + + *eprom_present = (brdctl & BRDDAT7); + *enableSE_high = (brdctl & BRDDAT6); + *enableSE_low = (brdctl & BRDDAT5); + *enableLVD_high = (brdctl & BRDDAT4); + *enableLVD_low = (brdctl & BRDDAT3); +} + +/*+F************************************************************************* + * Function: + * configure_termination + * + * Description: + * Configures the termination settings on PCI adapters that have + * SEEPROMs available. + *-F*************************************************************************/ +static void +configure_termination(struct aic7xxx_host *p) +{ + int internal50_present = 0; + int internal68_present = 0; + int external_present = 0; + int eprom_present = 0; + int enableSE_low = 0; + int enableSE_high = 0; + int enableLVD_low = 0; + int enableLVD_high = 0; + unsigned char brddat = 0; + unsigned char max_target = 0; + unsigned char sxfrctl1 = aic_inb(p, SXFRCTL1); + + if (acquire_seeprom(p)) + { + if (p->features & (AHC_WIDE|AHC_TWIN)) + max_target = 16; + else + max_target = 8; + aic_outb(p, SEEMS | SEECS, SEECTL); + sxfrctl1 &= ~STPWEN; + /* + * The termination/cable detection logic is split into three distinct + * groups. Ultra2 and later controllers, 2940UW-Pro controllers, and + * older 7850, 7860, 7870, 7880, and 7895 controllers. Each has its + * own unique way of detecting their cables and writing the results + * back to the card. + */ + if (p->features & AHC_ULTRA2) + { + /* + * As long as user hasn't overridden term settings, always check the + * cable detection logic + */ + if (aic7xxx_override_term == -1) + { + aic7xxx_ultra2_term_detect(p, &enableSE_low, &enableSE_high, + &enableLVD_low, &enableLVD_high, + &eprom_present); + } + + /* + * If the user is overriding settings, then they have been preserved + * to here as fake adapter_control entries. Parse them and allow + * them to override the detected settings (if we even did detection). + */ + if (!(p->adapter_control & CFSEAUTOTERM)) + { + enableSE_low = (p->adapter_control & CFSTERM); + enableSE_high = (p->adapter_control & CFWSTERM); + } + if (!(p->adapter_control & CFAUTOTERM)) + { + enableLVD_low = enableLVD_high = (p->adapter_control & CFLVDSTERM); + } + + /* + * Now take those settings that we have and translate them into the + * values that must be written into the registers. + * + * Flash Enable = BRDDAT7 + * Secondary High Term Enable = BRDDAT6 + * Secondary Low Term Enable = BRDDAT5 + * LVD/Primary High Term Enable = BRDDAT4 + * LVD/Primary Low Term Enable = STPWEN bit in SXFRCTL1 + */ + if (enableLVD_low != 0) + { + sxfrctl1 |= STPWEN; + p->flags |= AHC_TERM_ENB_LVD; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) LVD/Primary Low byte termination " + "Enabled\n", p->host_no); + } + + if (enableLVD_high != 0) + { + brddat |= BRDDAT4; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) LVD/Primary High byte termination " + "Enabled\n", p->host_no); + } + + if (enableSE_low != 0) + { + brddat |= BRDDAT5; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) Secondary Low byte termination " + "Enabled\n", p->host_no); + } + + if (enableSE_high != 0) + { + brddat |= BRDDAT6; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) Secondary High byte termination " + "Enabled\n", p->host_no); + } + } + else if (p->features & AHC_NEW_AUTOTERM) + { + /* + * The 50 pin connector termination is controlled by STPWEN in the + * SXFRCTL1 register. Since the Adaptec docs typically say the + * controller is not allowed to be in the middle of a cable and + * this is the only connection on that stub of the bus, there is + * no need to even check for narrow termination, it's simply + * always on. + */ + sxfrctl1 |= STPWEN; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) Narrow channel termination Enabled\n", + p->host_no); + + if (p->adapter_control & CFAUTOTERM) + { + aic2940_uwpro_wide_cable_detect(p, &internal68_present, + &external_present, + &eprom_present); + printk(KERN_INFO "(scsi%d) Cables present (Int-50 %s, Int-68 %s, " + "Ext-68 %s)\n", p->host_no, + "Don't Care", + internal68_present ? "YES" : "NO", + external_present ? "YES" : "NO"); + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) EEPROM %s present.\n", p->host_no, + eprom_present ? "is" : "is not"); + if (internal68_present && external_present) + { + brddat = 0; + p->flags &= ~AHC_TERM_ENB_SE_HIGH; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) Wide channel termination Disabled\n", + p->host_no); + } + else + { + brddat = BRDDAT6; + p->flags |= AHC_TERM_ENB_SE_HIGH; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) Wide channel termination Enabled\n", + p->host_no); + } + } + else + { + /* + * The termination of the Wide channel is done more like normal + * though, and the setting of this termination is done by writing + * either a 0 or 1 to BRDDAT6 of the BRDDAT register + */ + if (p->adapter_control & CFWSTERM) + { + brddat = BRDDAT6; + p->flags |= AHC_TERM_ENB_SE_HIGH; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) Wide channel termination Enabled\n", + p->host_no); + } + else + { + brddat = 0; + } + } + } + else + { + if (p->adapter_control & CFAUTOTERM) + { + if (p->flags & AHC_MOTHERBOARD) + { + printk(KERN_INFO "(scsi%d) Warning - detected auto-termination\n", + p->host_no); + printk(KERN_INFO "(scsi%d) Please verify driver detected settings " + "are correct.\n", p->host_no); + printk(KERN_INFO "(scsi%d) If not, then please properly set the " + "device termination\n", p->host_no); + printk(KERN_INFO "(scsi%d) in the Adaptec SCSI BIOS by hitting " + "CTRL-A when prompted\n", p->host_no); + printk(KERN_INFO "(scsi%d) during machine bootup.\n", p->host_no); + } + /* Configure auto termination. */ + + if ( (p->chip & AHC_CHIPID_MASK) >= AHC_AIC7870 ) + { + aic787x_cable_detect(p, &internal50_present, &internal68_present, + &external_present, &eprom_present); + } + else + { + aic785x_cable_detect(p, &internal50_present, &external_present, + &eprom_present); + } + + if (max_target <= 8) + internal68_present = 0; + + if (max_target > 8) + { + printk(KERN_INFO "(scsi%d) Cables present (Int-50 %s, Int-68 %s, " + "Ext-68 %s)\n", p->host_no, + internal50_present ? "YES" : "NO", + internal68_present ? "YES" : "NO", + external_present ? "YES" : "NO"); + } + else + { + printk(KERN_INFO "(scsi%d) Cables present (Int-50 %s, Ext-50 %s)\n", + p->host_no, + internal50_present ? "YES" : "NO", + external_present ? "YES" : "NO"); + } + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) EEPROM %s present.\n", p->host_no, + eprom_present ? "is" : "is not"); + + /* + * Now set the termination based on what we found. BRDDAT6 + * controls wide termination enable. + * Flash Enable = BRDDAT7 + * SE High Term Enable = BRDDAT6 + */ + if (internal50_present && internal68_present && external_present) + { + printk(KERN_INFO "(scsi%d) Illegal cable configuration!! Only two\n", + p->host_no); + printk(KERN_INFO "(scsi%d) connectors on the SCSI controller may be " + "in use at a time!\n", p->host_no); + /* + * Force termination (low and high byte) on. This is safer than + * leaving it completely off, especially since this message comes + * most often from motherboard controllers that don't even have 3 + * connectors, but instead are failing the cable detection. + */ + internal50_present = external_present = 0; + enableSE_high = enableSE_low = 1; + } + + if ((max_target > 8) && + ((external_present == 0) || (internal68_present == 0)) ) + { + brddat |= BRDDAT6; + p->flags |= AHC_TERM_ENB_SE_HIGH; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) SE High byte termination Enabled\n", + p->host_no); + } + + if ( ((internal50_present ? 1 : 0) + + (internal68_present ? 1 : 0) + + (external_present ? 1 : 0)) <= 1 ) + { + sxfrctl1 |= STPWEN; + p->flags |= AHC_TERM_ENB_SE_LOW; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) SE Low byte termination Enabled\n", + p->host_no); + } + } + else /* p->adapter_control & CFAUTOTERM */ + { + if (p->adapter_control & CFSTERM) + { + sxfrctl1 |= STPWEN; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) SE Low byte termination Enabled\n", + p->host_no); + } + + if (p->adapter_control & CFWSTERM) + { + brddat |= BRDDAT6; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) SE High byte termination Enabled\n", + p->host_no); + } + } + } + + aic_outb(p, sxfrctl1, SXFRCTL1); + write_brdctl(p, brddat); + release_seeprom(p); + } +} + +/*+F************************************************************************* + * Function: + * detect_maxscb + * + * Description: + * Detects the maximum number of SCBs for the controller and returns + * the count and a mask in p (p->maxscbs, p->qcntmask). + *-F*************************************************************************/ +static void +detect_maxscb(struct aic7xxx_host *p) +{ + int i; + + /* + * It's possible that we've already done this for multichannel + * adapters. + */ + if (p->scb_data->maxhscbs == 0) + { + /* + * We haven't initialized the SCB settings yet. Walk the SCBs to + * determince how many there are. + */ + aic_outb(p, 0, FREE_SCBH); + + for (i = 0; i < AIC7XXX_MAXSCB; i++) + { + aic_outb(p, i, SCBPTR); + aic_outb(p, i, SCB_CONTROL); + if (aic_inb(p, SCB_CONTROL) != i) + break; + aic_outb(p, 0, SCBPTR); + if (aic_inb(p, SCB_CONTROL) != 0) + break; + + aic_outb(p, i, SCBPTR); + aic_outb(p, 0, SCB_CONTROL); /* Clear the control byte. */ + aic_outb(p, i + 1, SCB_NEXT); /* Set the next pointer. */ + aic_outb(p, SCB_LIST_NULL, SCB_TAG); /* Make the tag invalid. */ + aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS); /* no busy untagged */ + aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS+1);/* targets active yet */ + aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS+2); + aic_outb(p, SCB_LIST_NULL, SCB_BUSYTARGETS+3); + } + + /* Make sure the last SCB terminates the free list. */ + aic_outb(p, i - 1, SCBPTR); + aic_outb(p, SCB_LIST_NULL, SCB_NEXT); + + /* Ensure we clear the first (0) SCBs control byte. */ + aic_outb(p, 0, SCBPTR); + aic_outb(p, 0, SCB_CONTROL); + + p->scb_data->maxhscbs = i; + /* + * Use direct indexing instead for speed + */ + if ( i == AIC7XXX_MAXSCB ) + p->flags &= ~AHC_PAGESCBS; + } + +} + +/*+F************************************************************************* + * Function: + * aic7xxx_register + * + * Description: + * Register a Adaptec aic7xxx chip SCSI controller with the kernel. + *-F*************************************************************************/ +static int +aic7xxx_register(Scsi_Host_Template *template, struct aic7xxx_host *p, + int reset_delay) +{ + int i, result; + int max_targets; + int found = 1; + unsigned char term, scsi_conf; + struct Scsi_Host *host; + + host = p->host; + + p->scb_data->maxscbs = AIC7XXX_MAXSCB; + host->can_queue = AIC7XXX_MAXSCB; + host->cmd_per_lun = 3; + host->sg_tablesize = AIC7XXX_MAX_SG; + host->this_id = p->scsi_id; + host->io_port = p->base; + host->n_io_port = 0xFF; + host->base = p->mbase; + host->irq = p->irq; + if (p->features & AHC_WIDE) + { + host->max_id = 16; + } + if (p->features & AHC_TWIN) + { + host->max_channel = 1; + } + + p->host = host; + p->host_no = host->host_no; + host->unique_id = p->instance; + p->isr_count = 0; + p->next = NULL; + p->completeq.head = NULL; + p->completeq.tail = NULL; + scbq_init(&p->scb_data->free_scbs); + scbq_init(&p->waiting_scbs); + INIT_LIST_HEAD(&p->aic_devs); + + /* + * We currently have no commands of any type + */ + p->qinfifonext = 0; + p->qoutfifonext = 0; + + printk(KERN_INFO "(scsi%d) <%s> found at ", p->host_no, + board_names[p->board_name_index]); + switch(p->chip) + { + case (AHC_AIC7770|AHC_EISA): + printk("EISA slot %d\n", p->pci_device_fn); + break; + case (AHC_AIC7770|AHC_VL): + printk("VLB slot %d\n", p->pci_device_fn); + break; + default: + printk("PCI %d/%d/%d\n", p->pci_bus, PCI_SLOT(p->pci_device_fn), + PCI_FUNC(p->pci_device_fn)); + break; + } + if (p->features & AHC_TWIN) + { + printk(KERN_INFO "(scsi%d) Twin Channel, A SCSI ID %d, B SCSI ID %d, ", + p->host_no, p->scsi_id, p->scsi_id_b); + } + else + { + char *channel; + + channel = ""; + + if ((p->flags & AHC_MULTI_CHANNEL) != 0) + { + channel = " A"; + + if ( (p->flags & (AHC_CHNLB|AHC_CHNLC)) != 0 ) + { + channel = (p->flags & AHC_CHNLB) ? " B" : " C"; + } + } + if (p->features & AHC_WIDE) + { + printk(KERN_INFO "(scsi%d) Wide ", p->host_no); + } + else + { + printk(KERN_INFO "(scsi%d) Narrow ", p->host_no); + } + printk("Channel%s, SCSI ID=%d, ", channel, p->scsi_id); + } + aic_outb(p, 0, SEQ_FLAGS); + + detect_maxscb(p); + + printk("%d/%d SCBs\n", p->scb_data->maxhscbs, p->scb_data->maxscbs); + if (aic7xxx_verbose & VERBOSE_PROBE2) + { + printk(KERN_INFO "(scsi%d) BIOS %sabled, IO Port 0x%lx, IRQ %d\n", + p->host_no, (p->flags & AHC_BIOS_ENABLED) ? "en" : "dis", + p->base, p->irq); + printk(KERN_INFO "(scsi%d) IO Memory at 0x%lx, MMAP Memory at %p\n", + p->host_no, p->mbase, p->maddr); + } + +#ifdef CONFIG_PCI + /* + * Now that we know our instance number, we can set the flags we need to + * force termination if need be. + */ + if (aic7xxx_stpwlev != -1) + { + /* + * This option only applies to PCI controllers. + */ + if ( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI) + { + unsigned char devconfig; + + pci_read_config_byte(p->pdev, DEVCONFIG, &devconfig); + if ( (aic7xxx_stpwlev >> p->instance) & 0x01 ) + { + devconfig |= STPWLEVEL; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk("(scsi%d) Force setting STPWLEVEL bit\n", p->host_no); + } + else + { + devconfig &= ~STPWLEVEL; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk("(scsi%d) Force clearing STPWLEVEL bit\n", p->host_no); + } + pci_write_config_byte(p->pdev, DEVCONFIG, devconfig); + } + } +#endif + + /* + * That took care of devconfig and stpwlev, now for the actual termination + * settings. + */ + if (aic7xxx_override_term != -1) + { + /* + * Again, this only applies to PCI controllers. We don't have problems + * with the termination on 274x controllers to the best of my knowledge. + */ + if ( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI) + { + unsigned char term_override; + + term_override = ( (aic7xxx_override_term >> (p->instance * 4)) & 0x0f); + p->adapter_control &= + ~(CFSTERM|CFWSTERM|CFLVDSTERM|CFAUTOTERM|CFSEAUTOTERM); + if ( (p->features & AHC_ULTRA2) && (term_override & 0x0c) ) + { + p->adapter_control |= CFLVDSTERM; + } + if (term_override & 0x02) + { + p->adapter_control |= CFWSTERM; + } + if (term_override & 0x01) + { + p->adapter_control |= CFSTERM; + } + } + } + + if ( (p->flags & AHC_SEEPROM_FOUND) || (aic7xxx_override_term != -1) ) + { + if (p->features & AHC_SPIOCAP) + { + if ( aic_inb(p, SPIOCAP) & SSPIOCPS ) + /* + * Update the settings in sxfrctl1 to match the termination + * settings. + */ + configure_termination(p); + } + else if ((p->chip & AHC_CHIPID_MASK) >= AHC_AIC7870) + { + configure_termination(p); + } + } + + /* + * Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels + */ + if (p->features & AHC_TWIN) + { + /* Select channel B */ + aic_outb(p, aic_inb(p, SBLKCTL) | SELBUSB, SBLKCTL); + + if ((p->flags & AHC_SEEPROM_FOUND) || (aic7xxx_override_term != -1)) + term = (aic_inb(p, SXFRCTL1) & STPWEN); + else + term = ((p->flags & AHC_TERM_ENB_B) ? STPWEN : 0); + + aic_outb(p, p->scsi_id_b, SCSIID); + scsi_conf = aic_inb(p, SCSICONF + 1); + aic_outb(p, DFON | SPIOEN, SXFRCTL0); + aic_outb(p, (scsi_conf & ENSPCHK) | aic7xxx_seltime | term | + ENSTIMER | ACTNEGEN, SXFRCTL1); + aic_outb(p, 0, SIMODE0); + aic_outb(p, ENSELTIMO | ENSCSIRST | ENSCSIPERR, SIMODE1); + aic_outb(p, 0, SCSIRATE); + + /* Select channel A */ + aic_outb(p, aic_inb(p, SBLKCTL) & ~SELBUSB, SBLKCTL); + } + + if (p->features & AHC_ULTRA2) + { + aic_outb(p, p->scsi_id, SCSIID_ULTRA2); + } + else + { + aic_outb(p, p->scsi_id, SCSIID); + } + if ((p->flags & AHC_SEEPROM_FOUND) || (aic7xxx_override_term != -1)) + term = (aic_inb(p, SXFRCTL1) & STPWEN); + else + term = ((p->flags & (AHC_TERM_ENB_A|AHC_TERM_ENB_LVD)) ? STPWEN : 0); + scsi_conf = aic_inb(p, SCSICONF); + aic_outb(p, DFON | SPIOEN, SXFRCTL0); + aic_outb(p, (scsi_conf & ENSPCHK) | aic7xxx_seltime | term | + ENSTIMER | ACTNEGEN, SXFRCTL1); + aic_outb(p, 0, SIMODE0); + /* + * If we are a cardbus adapter then don't enable SCSI reset detection. + * We shouldn't likely be sharing SCSI busses with someone else, and + * if we don't have a cable currently plugged into the controller then + * we won't have a power source for the SCSI termination, which means + * we'll see infinite incoming bus resets. + */ + if(p->flags & AHC_NO_STPWEN) + aic_outb(p, ENSELTIMO | ENSCSIPERR, SIMODE1); + else + aic_outb(p, ENSELTIMO | ENSCSIRST | ENSCSIPERR, SIMODE1); + aic_outb(p, 0, SCSIRATE); + if ( p->features & AHC_ULTRA2) + aic_outb(p, 0, SCSIOFFSET); + + /* + * Look at the information that board initialization or the board + * BIOS has left us. In the lower four bits of each target's + * scratch space any value other than 0 indicates that we should + * initiate synchronous transfers. If it's zero, the user or the + * BIOS has decided to disable synchronous negotiation to that + * target so we don't activate the needsdtr flag. + */ + if ((p->features & (AHC_TWIN|AHC_WIDE)) == 0) + { + max_targets = 8; + } + else + { + max_targets = 16; + } + + if (!(aic7xxx_no_reset)) + { + /* + * If we reset the bus, then clear the transfer settings, else leave + * them be. + */ + aic_outb(p, 0, ULTRA_ENB); + aic_outb(p, 0, ULTRA_ENB + 1); + p->ultraenb = 0; + } + + /* + * Allocate enough hardware scbs to handle the maximum number of + * concurrent transactions we can have. We have to make sure that + * the allocated memory is contiguous memory. The Linux kmalloc + * routine should only allocate contiguous memory, but note that + * this could be a problem if kmalloc() is changed. + */ + { + size_t array_size; + unsigned int hscb_physaddr; + + array_size = p->scb_data->maxscbs * sizeof(struct aic7xxx_hwscb); + if (p->scb_data->hscbs == NULL) + { + /* pci_alloc_consistent enforces the alignment already and + * clears the area as well. + */ + p->scb_data->hscbs = pci_alloc_consistent(p->pdev, array_size, + &p->scb_data->hscbs_dma); + /* We have to use pci_free_consistent, not kfree */ + p->scb_data->hscb_kmalloc_ptr = NULL; + p->scb_data->hscbs_dma_len = array_size; + } + if (p->scb_data->hscbs == NULL) + { + printk("(scsi%d) Unable to allocate hardware SCB array; " + "failing detection.\n", p->host_no); + aic_outb(p, 0, SIMODE1); + p->irq = 0; + return(0); + } + + hscb_physaddr = p->scb_data->hscbs_dma; + aic_outb(p, hscb_physaddr & 0xFF, HSCB_ADDR); + aic_outb(p, (hscb_physaddr >> 8) & 0xFF, HSCB_ADDR + 1); + aic_outb(p, (hscb_physaddr >> 16) & 0xFF, HSCB_ADDR + 2); + aic_outb(p, (hscb_physaddr >> 24) & 0xFF, HSCB_ADDR + 3); + + /* Set up the fifo areas at the same time */ + p->untagged_scbs = pci_alloc_consistent(p->pdev, 3*256, &p->fifo_dma); + if (p->untagged_scbs == NULL) + { + printk("(scsi%d) Unable to allocate hardware FIFO arrays; " + "failing detection.\n", p->host_no); + p->irq = 0; + return(0); + } + + p->qoutfifo = p->untagged_scbs + 256; + p->qinfifo = p->qoutfifo + 256; + for (i = 0; i < 256; i++) + { + p->untagged_scbs[i] = SCB_LIST_NULL; + p->qinfifo[i] = SCB_LIST_NULL; + p->qoutfifo[i] = SCB_LIST_NULL; + } + + hscb_physaddr = p->fifo_dma; + aic_outb(p, hscb_physaddr & 0xFF, SCBID_ADDR); + aic_outb(p, (hscb_physaddr >> 8) & 0xFF, SCBID_ADDR + 1); + aic_outb(p, (hscb_physaddr >> 16) & 0xFF, SCBID_ADDR + 2); + aic_outb(p, (hscb_physaddr >> 24) & 0xFF, SCBID_ADDR + 3); + } + + /* The Q-FIFOs we just set up are all empty */ + aic_outb(p, 0, QINPOS); + aic_outb(p, 0, KERNEL_QINPOS); + aic_outb(p, 0, QOUTPOS); + + if(p->features & AHC_QUEUE_REGS) + { + aic_outb(p, SCB_QSIZE_256, QOFF_CTLSTA); + aic_outb(p, 0, SDSCB_QOFF); + aic_outb(p, 0, SNSCB_QOFF); + aic_outb(p, 0, HNSCB_QOFF); + } + + /* + * We don't have any waiting selections or disconnected SCBs. + */ + aic_outb(p, SCB_LIST_NULL, WAITING_SCBH); + aic_outb(p, SCB_LIST_NULL, DISCONNECTED_SCBH); + + /* + * Message out buffer starts empty + */ + aic_outb(p, MSG_NOOP, MSG_OUT); + aic_outb(p, MSG_NOOP, LAST_MSG); + + /* + * Set all the other asundry items that haven't been set yet. + * This includes just dumping init values to a lot of registers simply + * to make sure they've been touched and are ready for use parity wise + * speaking. + */ + aic_outb(p, 0, TMODE_CMDADDR); + aic_outb(p, 0, TMODE_CMDADDR + 1); + aic_outb(p, 0, TMODE_CMDADDR + 2); + aic_outb(p, 0, TMODE_CMDADDR + 3); + aic_outb(p, 0, TMODE_CMDADDR_NEXT); + + /* + * Link us into the list of valid hosts + */ + p->next = first_aic7xxx; + first_aic7xxx = p; + + /* + * Allocate the first set of scbs for this controller. This is to stream- + * line code elsewhere in the driver. If we have to check for the existence + * of scbs in certain code sections, it slows things down. However, as + * soon as we register the IRQ for this card, we could get an interrupt that + * includes possibly the SCSI_RSTI interrupt. If we catch that interrupt + * then we are likely to segfault if we don't have at least one chunk of + * SCBs allocated or add checks all through the reset code to make sure + * that the SCBs have been allocated which is an invalid running condition + * and therefore I think it's preferable to simply pre-allocate the first + * chunk of SCBs. + */ + aic7xxx_allocate_scb(p); + + /* + * Load the sequencer program, then re-enable the board - + * resetting the AIC-7770 disables it, leaving the lights + * on with nobody home. + */ + aic7xxx_loadseq(p); + + /* + * Make sure the AUTOFLUSHDIS bit is *not* set in the SBLKCTL register + */ + aic_outb(p, aic_inb(p, SBLKCTL) & ~AUTOFLUSHDIS, SBLKCTL); + + if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 ) + { + aic_outb(p, ENABLE, BCTL); /* Enable the boards BUS drivers. */ + } + + if ( !(aic7xxx_no_reset) ) + { + if (p->features & AHC_TWIN) + { + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk(KERN_INFO "(scsi%d) Resetting channel B\n", p->host_no); + aic_outb(p, aic_inb(p, SBLKCTL) | SELBUSB, SBLKCTL); + aic7xxx_reset_current_bus(p); + aic_outb(p, aic_inb(p, SBLKCTL) & ~SELBUSB, SBLKCTL); + } + /* Reset SCSI bus A. */ + if (aic7xxx_verbose & VERBOSE_PROBE2) + { /* In case we are a 3940, 3985, or 7895, print the right channel */ + char *channel = ""; + if (p->flags & AHC_MULTI_CHANNEL) + { + channel = " A"; + if (p->flags & (AHC_CHNLB|AHC_CHNLC)) + channel = (p->flags & AHC_CHNLB) ? " B" : " C"; + } + printk(KERN_INFO "(scsi%d) Resetting channel%s\n", p->host_no, channel); + } + + aic7xxx_reset_current_bus(p); + + } + else + { + if (!reset_delay) + { + printk(KERN_INFO "(scsi%d) Not resetting SCSI bus. Note: Don't use " + "the no_reset\n", p->host_no); + printk(KERN_INFO "(scsi%d) option unless you have a verifiable need " + "for it.\n", p->host_no); + } + } + + /* + * Register IRQ with the kernel. Only allow sharing IRQs with + * PCI devices. + */ + if (!(p->chip & AHC_PCI)) + { + result = (request_irq(p->irq, do_aic7xxx_isr, 0, "aic7xxx", p)); + } + else + { + result = (request_irq(p->irq, do_aic7xxx_isr, SA_SHIRQ, + "aic7xxx", p)); + if (result < 0) + { + result = (request_irq(p->irq, do_aic7xxx_isr, SA_INTERRUPT | SA_SHIRQ, + "aic7xxx", p)); + } + } + if (result < 0) + { + printk(KERN_WARNING "(scsi%d) Couldn't register IRQ %d, ignoring " + "controller.\n", p->host_no, p->irq); + aic_outb(p, 0, SIMODE1); + p->irq = 0; + return (0); + } + + if(aic_inb(p, INTSTAT) & INT_PEND) + printk(INFO_LEAD "spurious interrupt during configuration, cleared.\n", + p->host_no, -1, -1 , -1); + aic7xxx_clear_intstat(p); + + unpause_sequencer(p, /* unpause_always */ TRUE); + + return (found); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_chip_reset + * + * Description: + * Perform a chip reset on the aic7xxx SCSI controller. The controller + * is paused upon return. + *-F*************************************************************************/ +static int +aic7xxx_chip_reset(struct aic7xxx_host *p) +{ + unsigned char sblkctl; + int wait; + + /* + * For some 274x boards, we must clear the CHIPRST bit and pause + * the sequencer. For some reason, this makes the driver work. + */ + aic_outb(p, PAUSE | CHIPRST, HCNTRL); + + /* + * In the future, we may call this function as a last resort for + * error handling. Let's be nice and not do any unnecessary delays. + */ + wait = 1000; /* 1 msec (1000 * 1 msec) */ + while (--wait && !(aic_inb(p, HCNTRL) & CHIPRSTACK)) + { + udelay(1); /* 1 usec */ + } + + pause_sequencer(p); + + sblkctl = aic_inb(p, SBLKCTL) & (SELBUSB|SELWIDE); + if (p->chip & AHC_PCI) + sblkctl &= ~SELBUSB; + switch( sblkctl ) + { + case 0: /* normal narrow card */ + break; + case 2: /* Wide card */ + p->features |= AHC_WIDE; + break; + case 8: /* Twin card */ + p->features |= AHC_TWIN; + p->flags |= AHC_MULTI_CHANNEL; + break; + default: /* hmmm...we don't know what this is */ + printk(KERN_WARNING "aic7xxx: Unsupported adapter type %d, ignoring.\n", + aic_inb(p, SBLKCTL) & 0x0a); + return(-1); + } + return(0); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_alloc + * + * Description: + * Allocate and initialize a host structure. Returns NULL upon error + * and a pointer to a aic7xxx_host struct upon success. + *-F*************************************************************************/ +static struct aic7xxx_host * +aic7xxx_alloc(Scsi_Host_Template *sht, struct aic7xxx_host *temp) +{ + struct aic7xxx_host *p = NULL; + struct Scsi_Host *host; + + /* + * Allocate a storage area by registering us with the mid-level + * SCSI layer. + */ + host = scsi_register(sht, sizeof(struct aic7xxx_host)); + + if (host != NULL) + { + p = (struct aic7xxx_host *) host->hostdata; + memset(p, 0, sizeof(struct aic7xxx_host)); + *p = *temp; + p->host = host; + + p->scb_data = kmalloc(sizeof(scb_data_type), GFP_ATOMIC); + if (p->scb_data != NULL) + { + memset(p->scb_data, 0, sizeof(scb_data_type)); + scbq_init (&p->scb_data->free_scbs); + } + else + { + /* + * For some reason we don't have enough memory. Free the + * allocated memory for the aic7xxx_host struct, and return NULL. + */ + release_region(p->base, MAXREG - MINREG); + scsi_unregister(host); + return(NULL); + } + p->host_no = host->host_no; + } + scsi_set_device(host, &p->pdev->dev); + return (p); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_free + * + * Description: + * Frees and releases all resources associated with an instance of + * the driver (struct aic7xxx_host *). + *-F*************************************************************************/ +static void +aic7xxx_free(struct aic7xxx_host *p) +{ + int i; + + /* + * Free the allocated hardware SCB space. + */ + if (p->scb_data != NULL) + { + struct aic7xxx_scb_dma *scb_dma = NULL; + if (p->scb_data->hscbs != NULL) + { + pci_free_consistent(p->pdev, p->scb_data->hscbs_dma_len, + p->scb_data->hscbs, p->scb_data->hscbs_dma); + p->scb_data->hscbs = p->scb_data->hscb_kmalloc_ptr = NULL; + } + /* + * Free the driver SCBs. These were allocated on an as-need + * basis. We allocated these in groups depending on how many + * we could fit into a given amount of RAM. The tail SCB for + * these allocations has a pointer to the alloced area. + */ + for (i = 0; i < p->scb_data->numscbs; i++) + { + if (p->scb_data->scb_array[i]->scb_dma != scb_dma) + { + scb_dma = p->scb_data->scb_array[i]->scb_dma; + pci_free_consistent(p->pdev, scb_dma->dma_len, + (void *)((unsigned long)scb_dma->dma_address + - scb_dma->dma_offset), + scb_dma->dma_address); + } + if (p->scb_data->scb_array[i]->kmalloc_ptr != NULL) + kfree(p->scb_data->scb_array[i]->kmalloc_ptr); + p->scb_data->scb_array[i] = NULL; + } + + /* + * Free the SCB data area. + */ + kfree(p->scb_data); + } + + pci_free_consistent(p->pdev, 3*256, (void *)p->untagged_scbs, p->fifo_dma); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_load_seeprom + * + * Description: + * Load the seeprom and configure adapter and target settings. + * Returns 1 if the load was successful and 0 otherwise. + *-F*************************************************************************/ +static void +aic7xxx_load_seeprom(struct aic7xxx_host *p, unsigned char *sxfrctl1) +{ + int have_seeprom = 0; + int i, max_targets, mask; + unsigned char scsirate, scsi_conf; + unsigned short scarray[128]; + struct seeprom_config *sc = (struct seeprom_config *) scarray; + + if (aic7xxx_verbose & VERBOSE_PROBE2) + { + printk(KERN_INFO "aic7xxx: Loading serial EEPROM..."); + } + switch (p->chip) + { + case (AHC_AIC7770|AHC_EISA): /* None of these adapters have seeproms. */ + if (aic_inb(p, SCSICONF) & TERM_ENB) + p->flags |= AHC_TERM_ENB_A; + if ( (p->features & AHC_TWIN) && (aic_inb(p, SCSICONF + 1) & TERM_ENB) ) + p->flags |= AHC_TERM_ENB_B; + break; + + case (AHC_AIC7770|AHC_VL): + have_seeprom = read_284x_seeprom(p, (struct seeprom_config *) scarray); + break; + + default: + have_seeprom = read_seeprom(p, (p->flags & (AHC_CHNLB|AHC_CHNLC)), + scarray, p->sc_size, p->sc_type); + if (!have_seeprom) + { + if(p->sc_type == C46) + have_seeprom = read_seeprom(p, (p->flags & (AHC_CHNLB|AHC_CHNLC)), + scarray, p->sc_size, C56_66); + else + have_seeprom = read_seeprom(p, (p->flags & (AHC_CHNLB|AHC_CHNLC)), + scarray, p->sc_size, C46); + } + if (!have_seeprom) + { + p->sc_size = 128; + have_seeprom = read_seeprom(p, 4*(p->flags & (AHC_CHNLB|AHC_CHNLC)), + scarray, p->sc_size, p->sc_type); + if (!have_seeprom) + { + if(p->sc_type == C46) + have_seeprom = read_seeprom(p, 4*(p->flags & (AHC_CHNLB|AHC_CHNLC)), + scarray, p->sc_size, C56_66); + else + have_seeprom = read_seeprom(p, 4*(p->flags & (AHC_CHNLB|AHC_CHNLC)), + scarray, p->sc_size, C46); + } + } + break; + } + + if (!have_seeprom) + { + if (aic7xxx_verbose & VERBOSE_PROBE2) + { + printk("\naic7xxx: No SEEPROM available.\n"); + } + p->flags |= AHC_NEWEEPROM_FMT; + if (aic_inb(p, SCSISEQ) == 0) + { + p->flags |= AHC_USEDEFAULTS; + p->flags &= ~AHC_BIOS_ENABLED; + p->scsi_id = p->scsi_id_b = 7; + *sxfrctl1 |= STPWEN; + if (aic7xxx_verbose & VERBOSE_PROBE2) + { + printk("aic7xxx: Using default values.\n"); + } + } + else if (aic7xxx_verbose & VERBOSE_PROBE2) + { + printk("aic7xxx: Using leftover BIOS values.\n"); + } + if ( ((p->chip & ~AHC_CHIPID_MASK) == AHC_PCI) && (*sxfrctl1 & STPWEN) ) + { + p->flags |= AHC_TERM_ENB_SE_LOW | AHC_TERM_ENB_SE_HIGH; + sc->adapter_control &= ~CFAUTOTERM; + sc->adapter_control |= CFSTERM | CFWSTERM | CFLVDSTERM; + } + if (aic7xxx_extended) + p->flags |= (AHC_EXTEND_TRANS_A | AHC_EXTEND_TRANS_B); + else + p->flags &= ~(AHC_EXTEND_TRANS_A | AHC_EXTEND_TRANS_B); + } + else + { + if (aic7xxx_verbose & VERBOSE_PROBE2) + { + printk("done\n"); + } + + /* + * Note things in our flags + */ + p->flags |= AHC_SEEPROM_FOUND; + + /* + * Update the settings in sxfrctl1 to match the termination settings. + */ + *sxfrctl1 = 0; + + /* + * Get our SCSI ID from the SEEPROM setting... + */ + p->scsi_id = (sc->brtime_id & CFSCSIID); + + /* + * First process the settings that are different between the VLB + * and PCI adapter seeproms. + */ + if ((p->chip & AHC_CHIPID_MASK) == AHC_AIC7770) + { + /* VLB adapter seeproms */ + if (sc->bios_control & CF284XEXTEND) + p->flags |= AHC_EXTEND_TRANS_A; + + if (sc->adapter_control & CF284XSTERM) + { + *sxfrctl1 |= STPWEN; + p->flags |= AHC_TERM_ENB_SE_LOW | AHC_TERM_ENB_SE_HIGH; + } + } + else + { + /* PCI adapter seeproms */ + if (sc->bios_control & CFEXTEND) + p->flags |= AHC_EXTEND_TRANS_A; + if (sc->bios_control & CFBIOSEN) + p->flags |= AHC_BIOS_ENABLED; + else + p->flags &= ~AHC_BIOS_ENABLED; + + if (sc->adapter_control & CFSTERM) + { + *sxfrctl1 |= STPWEN; + p->flags |= AHC_TERM_ENB_SE_LOW | AHC_TERM_ENB_SE_HIGH; + } + } + memcpy(&p->sc, sc, sizeof(struct seeprom_config)); + } + + p->discenable = 0; + + /* + * Limit to 16 targets just in case. The 2842 for one is known to + * blow the max_targets setting, future cards might also. + */ + max_targets = ((p->features & (AHC_TWIN | AHC_WIDE)) ? 16 : 8); + + if (have_seeprom) + { + for (i = 0; i < max_targets; i++) + { + if( ((p->features & AHC_ULTRA) && + !(sc->adapter_control & CFULTRAEN) && + (sc->device_flags[i] & CFSYNCHISULTRA)) || + (sc->device_flags[i] & CFNEWULTRAFORMAT) ) + { + p->flags |= AHC_NEWEEPROM_FMT; + break; + } + } + } + + for (i = 0; i < max_targets; i++) + { + mask = (0x01 << i); + if (!have_seeprom) + { + if (aic_inb(p, SCSISEQ) != 0) + { + /* + * OK...the BIOS set things up and left behind the settings we need. + * Just make our sc->device_flags[i] entry match what the card has + * set for this device. + */ + p->discenable = + ~(aic_inb(p, DISC_DSB) | (aic_inb(p, DISC_DSB + 1) << 8) ); + p->ultraenb = + (aic_inb(p, ULTRA_ENB) | (aic_inb(p, ULTRA_ENB + 1) << 8) ); + sc->device_flags[i] = (p->discenable & mask) ? CFDISC : 0; + if (aic_inb(p, TARG_SCSIRATE + i) & WIDEXFER) + sc->device_flags[i] |= CFWIDEB; + if (p->features & AHC_ULTRA2) + { + if (aic_inb(p, TARG_OFFSET + i)) + { + sc->device_flags[i] |= CFSYNCH; + sc->device_flags[i] |= (aic_inb(p, TARG_SCSIRATE + i) & 0x07); + if ( (aic_inb(p, TARG_SCSIRATE + i) & 0x18) == 0x18 ) + sc->device_flags[i] |= CFSYNCHISULTRA; + } + } + else + { + if (aic_inb(p, TARG_SCSIRATE + i) & ~WIDEXFER) + { + sc->device_flags[i] |= CFSYNCH; + if (p->features & AHC_ULTRA) + sc->device_flags[i] |= ((p->ultraenb & mask) ? + CFSYNCHISULTRA : 0); + } + } + } + else + { + /* + * Assume the BIOS has NOT been run on this card and nothing between + * the card and the devices is configured yet. + */ + sc->device_flags[i] = CFDISC; + if (p->features & AHC_WIDE) + sc->device_flags[i] |= CFWIDEB; + if (p->features & AHC_ULTRA3) + sc->device_flags[i] |= 2; + else if (p->features & AHC_ULTRA2) + sc->device_flags[i] |= 3; + else if (p->features & AHC_ULTRA) + sc->device_flags[i] |= CFSYNCHISULTRA; + sc->device_flags[i] |= CFSYNCH; + aic_outb(p, 0, TARG_SCSIRATE + i); + if (p->features & AHC_ULTRA2) + aic_outb(p, 0, TARG_OFFSET + i); + } + } + if (sc->device_flags[i] & CFDISC) + { + p->discenable |= mask; + } + if (p->flags & AHC_NEWEEPROM_FMT) + { + if ( !(p->features & AHC_ULTRA2) ) + { + /* + * I know of two different Ultra BIOSes that do this differently. + * One on the Gigabyte 6BXU mb that wants flags[i] & CFXFER to + * be == to 0x03 and SYNCHISULTRA to be true to mean 40MByte/s + * while on the IBM Netfinity 5000 they want the same thing + * to be something else, while flags[i] & CFXFER == 0x03 and + * SYNCHISULTRA false should be 40MByte/s. So, we set both to + * 40MByte/s and the lower speeds be damned. People will have + * to select around the conversely mapped lower speeds in order + * to select lower speeds on these boards. + */ + if ( (sc->device_flags[i] & CFNEWULTRAFORMAT) && + ((sc->device_flags[i] & CFXFER) == 0x03) ) + { + sc->device_flags[i] &= ~CFXFER; + sc->device_flags[i] |= CFSYNCHISULTRA; + } + if (sc->device_flags[i] & CFSYNCHISULTRA) + { + p->ultraenb |= mask; + } + } + else if ( !(sc->device_flags[i] & CFNEWULTRAFORMAT) && + (p->features & AHC_ULTRA2) && + (sc->device_flags[i] & CFSYNCHISULTRA) ) + { + p->ultraenb |= mask; + } + } + else if (sc->adapter_control & CFULTRAEN) + { + p->ultraenb |= mask; + } + if ( (sc->device_flags[i] & CFSYNCH) == 0) + { + sc->device_flags[i] &= ~CFXFER; + p->ultraenb &= ~mask; + p->user[i].offset = 0; + p->user[i].period = 0; + p->user[i].options = 0; + } + else + { + if (p->features & AHC_ULTRA3) + { + p->user[i].offset = MAX_OFFSET_ULTRA2; + if( (sc->device_flags[i] & CFXFER) < 0x03 ) + { + scsirate = (sc->device_flags[i] & CFXFER); + p->user[i].options = MSG_EXT_PPR_OPTION_DT_CRC; + } + else + { + scsirate = (sc->device_flags[i] & CFXFER) | + ((p->ultraenb & mask) ? 0x18 : 0x10); + p->user[i].options = 0; + } + p->user[i].period = aic7xxx_find_period(p, scsirate, + AHC_SYNCRATE_ULTRA3); + } + else if (p->features & AHC_ULTRA2) + { + p->user[i].offset = MAX_OFFSET_ULTRA2; + scsirate = (sc->device_flags[i] & CFXFER) | + ((p->ultraenb & mask) ? 0x18 : 0x10); + p->user[i].options = 0; + p->user[i].period = aic7xxx_find_period(p, scsirate, + AHC_SYNCRATE_ULTRA2); + } + else + { + scsirate = (sc->device_flags[i] & CFXFER) << 4; + p->user[i].options = 0; + p->user[i].offset = MAX_OFFSET_8BIT; + if (p->features & AHC_ULTRA) + { + short ultraenb; + ultraenb = aic_inb(p, ULTRA_ENB) | + (aic_inb(p, ULTRA_ENB + 1) << 8); + p->user[i].period = aic7xxx_find_period(p, scsirate, + (p->ultraenb & mask) ? + AHC_SYNCRATE_ULTRA : + AHC_SYNCRATE_FAST); + } + else + p->user[i].period = aic7xxx_find_period(p, scsirate, + AHC_SYNCRATE_FAST); + } + } + if ( (sc->device_flags[i] & CFWIDEB) && (p->features & AHC_WIDE) ) + { + p->user[i].width = MSG_EXT_WDTR_BUS_16_BIT; + } + else + { + p->user[i].width = MSG_EXT_WDTR_BUS_8_BIT; + } + } + aic_outb(p, ~(p->discenable & 0xFF), DISC_DSB); + aic_outb(p, ~((p->discenable >> 8) & 0xFF), DISC_DSB + 1); + + /* + * We set the p->ultraenb from the SEEPROM to begin with, but now we make + * it match what is already down in the card. If we are doing a reset + * on the card then this will get put back to a default state anyway. + * This allows us to not have to pre-emptively negotiate when using the + * no_reset option. + */ + if (p->features & AHC_ULTRA) + p->ultraenb = aic_inb(p, ULTRA_ENB) | (aic_inb(p, ULTRA_ENB + 1) << 8); + + + scsi_conf = (p->scsi_id & HSCSIID); + + if(have_seeprom) + { + p->adapter_control = sc->adapter_control; + p->bios_control = sc->bios_control; + + switch (p->chip & AHC_CHIPID_MASK) + { + case AHC_AIC7895: + case AHC_AIC7896: + case AHC_AIC7899: + if (p->adapter_control & CFBPRIMARY) + p->flags |= AHC_CHANNEL_B_PRIMARY; + default: + break; + } + + if (sc->adapter_control & CFSPARITY) + scsi_conf |= ENSPCHK; + } + else + { + scsi_conf |= ENSPCHK | RESET_SCSI; + } + + /* + * Only set the SCSICONF and SCSICONF + 1 registers if we are a PCI card. + * The 2842 and 2742 cards already have these registers set and we don't + * want to muck with them since we don't set all the bits they do. + */ + if ( (p->chip & ~AHC_CHIPID_MASK) == AHC_PCI ) + { + /* Set the host ID */ + aic_outb(p, scsi_conf, SCSICONF); + /* In case we are a wide card */ + aic_outb(p, p->scsi_id, SCSICONF + 1); + } +} + +/*+F************************************************************************* + * Function: + * aic7xxx_configure_bugs + * + * Description: + * Take the card passed in and set the appropriate bug flags based upon + * the card model. Also make any changes needed to device registers or + * PCI registers while we are here. + *-F*************************************************************************/ +static void +aic7xxx_configure_bugs(struct aic7xxx_host *p) +{ + unsigned short tmp_word; + + switch(p->chip & AHC_CHIPID_MASK) + { + case AHC_AIC7860: + p->bugs |= AHC_BUG_PCI_2_1_RETRY; + /* fall through */ + case AHC_AIC7850: + case AHC_AIC7870: + p->bugs |= AHC_BUG_TMODE_WIDEODD | AHC_BUG_CACHETHEN | AHC_BUG_PCI_MWI; + break; + case AHC_AIC7880: + p->bugs |= AHC_BUG_TMODE_WIDEODD | AHC_BUG_PCI_2_1_RETRY | + AHC_BUG_CACHETHEN | AHC_BUG_PCI_MWI; + break; + case AHC_AIC7890: + p->bugs |= AHC_BUG_AUTOFLUSH | AHC_BUG_CACHETHEN; + break; + case AHC_AIC7892: + p->bugs |= AHC_BUG_SCBCHAN_UPLOAD; + break; + case AHC_AIC7895: + p->bugs |= AHC_BUG_TMODE_WIDEODD | AHC_BUG_PCI_2_1_RETRY | + AHC_BUG_CACHETHEN | AHC_BUG_PCI_MWI; + break; + case AHC_AIC7896: + p->bugs |= AHC_BUG_CACHETHEN_DIS; + break; + case AHC_AIC7899: + p->bugs |= AHC_BUG_SCBCHAN_UPLOAD; + break; + default: + /* Nothing to do */ + break; + } + + /* + * Now handle the bugs that require PCI register or card register tweaks + */ + pci_read_config_word(p->pdev, PCI_COMMAND, &tmp_word); + if(p->bugs & AHC_BUG_PCI_MWI) + { + tmp_word &= ~PCI_COMMAND_INVALIDATE; + } + else + { + tmp_word |= PCI_COMMAND_INVALIDATE; + } + pci_write_config_word(p->pdev, PCI_COMMAND, tmp_word); + + if(p->bugs & AHC_BUG_CACHETHEN) + { + aic_outb(p, aic_inb(p, DSCOMMAND0) & ~CACHETHEN, DSCOMMAND0); + } + else if (p->bugs & AHC_BUG_CACHETHEN_DIS) + { + aic_outb(p, aic_inb(p, DSCOMMAND0) | CACHETHEN, DSCOMMAND0); + } + + return; +} + + +/*+F************************************************************************* + * Function: + * aic7xxx_detect + * + * Description: + * Try to detect and register an Adaptec 7770 or 7870 SCSI controller. + * + * XXX - This should really be called aic7xxx_probe(). A sequence of + * probe(), attach()/detach(), and init() makes more sense than + * one do-it-all function. This may be useful when (and if) the + * mid-level SCSI code is overhauled. + *-F*************************************************************************/ +static int +aic7xxx_detect(Scsi_Host_Template *template) +{ + struct aic7xxx_host *temp_p = NULL; + struct aic7xxx_host *current_p = NULL; + struct aic7xxx_host *list_p = NULL; + int found = 0; +#if defined(__i386__) || defined(__alpha__) + ahc_flag_type flags = 0; + int type; +#endif + unsigned char sxfrctl1; +#if defined(__i386__) || defined(__alpha__) + unsigned char hcntrl, hostconf; + unsigned int slot, base; +#endif + +#ifdef MODULE + /* + * If we are called as a module, the aic7xxx pointer may not be null + * and it would point to our bootup string, just like on the lilo + * command line. IF not NULL, then process this config string with + * aic7xxx_setup + */ + if(aic7xxx) + aic7xxx_setup(aic7xxx); +#endif + + template->proc_name = "aic7xxx"; + template->sg_tablesize = AIC7XXX_MAX_SG; + + +#ifdef CONFIG_PCI + /* + * PCI-bus probe. + */ + { + static struct + { + unsigned short vendor_id; + unsigned short device_id; + ahc_chip chip; + ahc_flag_type flags; + ahc_feature features; + int board_name_index; + unsigned short seeprom_size; + unsigned short seeprom_type; + } const aic_pdevs[] = { + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7810, AHC_NONE, + AHC_FNONE, AHC_FENONE, 1, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7850, AHC_AIC7850, + AHC_PAGESCBS, AHC_AIC7850_FE, 5, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7855, AHC_AIC7850, + AHC_PAGESCBS, AHC_AIC7850_FE, 6, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7821, AHC_AIC7860, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7860_FE, 7, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_3860, AHC_AIC7860, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7860_FE, 7, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_38602, AHC_AIC7860, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7860_FE, 7, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_38602, AHC_AIC7860, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7860_FE, 7, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7860, AHC_AIC7860, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MOTHERBOARD, + AHC_AIC7860_FE, 7, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7861, AHC_AIC7860, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7860_FE, 8, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7870, AHC_AIC7870, + AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MOTHERBOARD, + AHC_AIC7870_FE, 9, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7871, AHC_AIC7870, + AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7870_FE, 10, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7872, AHC_AIC7870, + AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7870_FE, 11, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7873, AHC_AIC7870, + AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7870_FE, 12, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7874, AHC_AIC7870, + AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7870_FE, 13, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7880, AHC_AIC7880, + AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MOTHERBOARD, + AHC_AIC7880_FE, 14, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7881, AHC_AIC7880, + AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 15, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7882, AHC_AIC7880, + AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7880_FE, 16, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7883, AHC_AIC7880, + AHC_PAGESCBS | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7880_FE, 17, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7884, AHC_AIC7880, + AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 18, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7885, AHC_AIC7880, + AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 18, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7886, AHC_AIC7880, + AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 18, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7887, AHC_AIC7880, + AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE | AHC_NEW_AUTOTERM, 19, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7888, AHC_AIC7880, + AHC_PAGESCBS | AHC_BIOS_ENABLED, AHC_AIC7880_FE, 18, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_7895, AHC_AIC7895, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7895_FE, 20, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7890, AHC_AIC7890, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7890_FE, 21, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7890B, AHC_AIC7890, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7890_FE, 21, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_2930U2, AHC_AIC7890, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7890_FE, 22, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_2940U2, AHC_AIC7890, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7890_FE, 23, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7896, AHC_AIC7896, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7896_FE, 24, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_3940U2, AHC_AIC7896, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7896_FE, 25, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_3950U2D, AHC_AIC7896, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7896_FE, 26, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC, PCI_DEVICE_ID_ADAPTEC_1480A, AHC_AIC7860, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_NO_STPWEN, + AHC_AIC7860_FE, 27, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7892A, AHC_AIC7892, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7892_FE, 28, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7892B, AHC_AIC7892, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7892_FE, 28, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7892D, AHC_AIC7892, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7892_FE, 28, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7892P, AHC_AIC7892, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED, + AHC_AIC7892_FE, 28, + 32, C46 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7899A, AHC_AIC7899, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7899_FE, 29, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7899B, AHC_AIC7899, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7899_FE, 29, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7899D, AHC_AIC7899, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7899_FE, 29, + 32, C56_66 }, + {PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_7899P, AHC_AIC7899, + AHC_PAGESCBS | AHC_NEWEEPROM_FMT | AHC_BIOS_ENABLED | AHC_MULTI_CHANNEL, + AHC_AIC7899_FE, 29, + 32, C56_66 }, + }; + + unsigned short command; + unsigned int devconfig, i, oldverbose; + struct pci_dev *pdev = NULL; + + for (i = 0; i < ARRAY_SIZE(aic_pdevs); i++) + { + pdev = NULL; + while ((pdev = pci_find_device(aic_pdevs[i].vendor_id, + aic_pdevs[i].device_id, + pdev))) { + if (pci_enable_device(pdev)) + continue; + if ( i == 0 ) /* We found one, but it's the 7810 RAID cont. */ + { + if (aic7xxx_verbose & (VERBOSE_PROBE|VERBOSE_PROBE2)) + { + printk(KERN_INFO "aic7xxx: The 7810 RAID controller is not " + "supported by\n"); + printk(KERN_INFO " this driver, we are ignoring it.\n"); + } + } + else if ( (temp_p = kmalloc(sizeof(struct aic7xxx_host), + GFP_ATOMIC)) != NULL ) + { + memset(temp_p, 0, sizeof(struct aic7xxx_host)); + temp_p->chip = aic_pdevs[i].chip | AHC_PCI; + temp_p->flags = aic_pdevs[i].flags; + temp_p->features = aic_pdevs[i].features; + temp_p->board_name_index = aic_pdevs[i].board_name_index; + temp_p->sc_size = aic_pdevs[i].seeprom_size; + temp_p->sc_type = aic_pdevs[i].seeprom_type; + + /* + * Read sundry information from PCI BIOS. + */ + temp_p->irq = pdev->irq; + temp_p->pdev = pdev; + temp_p->pci_bus = pdev->bus->number; + temp_p->pci_device_fn = pdev->devfn; + temp_p->base = pci_resource_start(pdev, 0); + temp_p->mbase = pci_resource_start(pdev, 1); + current_p = list_p; + while(current_p && temp_p) + { + if ( ((current_p->pci_bus == temp_p->pci_bus) && + (current_p->pci_device_fn == temp_p->pci_device_fn)) || + (temp_p->base && (current_p->base == temp_p->base)) || + (temp_p->mbase && (current_p->mbase == temp_p->mbase)) ) + { + /* duplicate PCI entry, skip it */ + kfree(temp_p); + temp_p = NULL; + continue; + } + current_p = current_p->next; + } + if(pci_request_regions(temp_p->pdev, "aic7xxx")) + { + printk("aic7xxx: <%s> at PCI %d/%d/%d\n", + board_names[aic_pdevs[i].board_name_index], + temp_p->pci_bus, + PCI_SLOT(temp_p->pci_device_fn), + PCI_FUNC(temp_p->pci_device_fn)); + printk("aic7xxx: I/O ports already in use, ignoring.\n"); + kfree(temp_p); + continue; + } + + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk("aic7xxx: <%s> at PCI %d/%d\n", + board_names[aic_pdevs[i].board_name_index], + PCI_SLOT(pdev->devfn), + PCI_FUNC(pdev->devfn)); + pci_read_config_word(pdev, PCI_COMMAND, &command); + if (aic7xxx_verbose & VERBOSE_PROBE2) + { + printk("aic7xxx: Initial PCI_COMMAND value was 0x%x\n", + (int)command); + } +#ifdef AIC7XXX_STRICT_PCI_SETUP + command |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY | + PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO; +#else + command |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO; +#endif + command &= ~PCI_COMMAND_INVALIDATE; + if (aic7xxx_pci_parity == 0) + command &= ~(PCI_COMMAND_SERR | PCI_COMMAND_PARITY); + pci_write_config_word(pdev, PCI_COMMAND, command); +#ifdef AIC7XXX_STRICT_PCI_SETUP + pci_read_config_dword(pdev, DEVCONFIG, &devconfig); + if (aic7xxx_verbose & VERBOSE_PROBE2) + { + printk("aic7xxx: Initial DEVCONFIG value was 0x%x\n", devconfig); + } + devconfig |= 0x80000040; + pci_write_config_dword(pdev, DEVCONFIG, devconfig); +#endif /* AIC7XXX_STRICT_PCI_SETUP */ + + temp_p->unpause = INTEN; + temp_p->pause = temp_p->unpause | PAUSE; + if ( ((temp_p->base == 0) && + (temp_p->mbase == 0)) || + (temp_p->irq == 0) ) + { + printk("aic7xxx: <%s> at PCI %d/%d/%d\n", + board_names[aic_pdevs[i].board_name_index], + temp_p->pci_bus, + PCI_SLOT(temp_p->pci_device_fn), + PCI_FUNC(temp_p->pci_device_fn)); + printk("aic7xxx: Controller disabled by BIOS, ignoring.\n"); + goto skip_pci_controller; + } + +#ifdef MMAPIO + if ( !(temp_p->base) || !(temp_p->flags & AHC_MULTI_CHANNEL) || + ((temp_p->chip != (AHC_AIC7870 | AHC_PCI)) && + (temp_p->chip != (AHC_AIC7880 | AHC_PCI))) ) + { + temp_p->maddr = ioremap_nocache(temp_p->mbase, 256); + if(temp_p->maddr) + { + /* + * We need to check the I/O with the MMAPed address. Some machines + * simply fail to work with MMAPed I/O and certain controllers. + */ + if(aic_inb(temp_p, HCNTRL) == 0xff) + { + /* + * OK.....we failed our test....go back to programmed I/O + */ + printk(KERN_INFO "aic7xxx: <%s> at PCI %d/%d/%d\n", + board_names[aic_pdevs[i].board_name_index], + temp_p->pci_bus, + PCI_SLOT(temp_p->pci_device_fn), + PCI_FUNC(temp_p->pci_device_fn)); + printk(KERN_INFO "aic7xxx: MMAPed I/O failed, reverting to " + "Programmed I/O.\n"); + iounmap(temp_p->maddr); + temp_p->maddr = NULL; + if(temp_p->base == 0) + { + printk("aic7xxx: <%s> at PCI %d/%d/%d\n", + board_names[aic_pdevs[i].board_name_index], + temp_p->pci_bus, + PCI_SLOT(temp_p->pci_device_fn), + PCI_FUNC(temp_p->pci_device_fn)); + printk("aic7xxx: Controller disabled by BIOS, ignoring.\n"); + goto skip_pci_controller; + } + } + } + } +#endif + + /* + * We HAVE to make sure the first pause_sequencer() and all other + * subsequent I/O that isn't PCI config space I/O takes place + * after the MMAPed I/O region is configured and tested. The + * problem is the PowerPC architecture that doesn't support + * programmed I/O at all, so we have to have the MMAP I/O set up + * for this pause to even work on those machines. + */ + pause_sequencer(temp_p); + + /* + * Clear out any pending PCI error status messages. Also set + * verbose to 0 so that we don't emit strange PCI error messages + * while cleaning out the current status bits. + */ + oldverbose = aic7xxx_verbose; + aic7xxx_verbose = 0; + aic7xxx_pci_intr(temp_p); + aic7xxx_verbose = oldverbose; + + temp_p->bios_address = 0; + + /* + * Remember how the card was setup in case there is no seeprom. + */ + if (temp_p->features & AHC_ULTRA2) + temp_p->scsi_id = aic_inb(temp_p, SCSIID_ULTRA2) & OID; + else + temp_p->scsi_id = aic_inb(temp_p, SCSIID) & OID; + /* + * Get current termination setting + */ + sxfrctl1 = aic_inb(temp_p, SXFRCTL1); + + if (aic7xxx_chip_reset(temp_p) == -1) + { + goto skip_pci_controller; + } + /* + * Very quickly put the term setting back into the register since + * the chip reset may cause odd things to happen. This is to keep + * LVD busses with lots of drives from draining the power out of + * the diffsense line before we get around to running the + * configure_termination() function. Also restore the STPWLEVEL + * bit of DEVCONFIG + */ + aic_outb(temp_p, sxfrctl1, SXFRCTL1); + pci_write_config_dword(temp_p->pdev, DEVCONFIG, devconfig); + sxfrctl1 &= STPWEN; + + /* + * We need to set the CHNL? assignments before loading the SEEPROM + * The 3940 and 3985 cards (original stuff, not any of the later + * stuff) are 7870 and 7880 class chips. The Ultra2 stuff falls + * under 7896 and 7897. The 7895 is in a class by itself :) + */ + switch (temp_p->chip & AHC_CHIPID_MASK) + { + case AHC_AIC7870: /* 3840 / 3985 */ + case AHC_AIC7880: /* 3840 UW / 3985 UW */ + if(temp_p->flags & AHC_MULTI_CHANNEL) + { + switch(PCI_SLOT(temp_p->pci_device_fn)) + { + case 5: + temp_p->flags |= AHC_CHNLB; + break; + case 8: + temp_p->flags |= AHC_CHNLB; + break; + case 12: + temp_p->flags |= AHC_CHNLC; + break; + default: + break; + } + } + break; + + case AHC_AIC7895: /* 7895 */ + case AHC_AIC7896: /* 7896/7 */ + case AHC_AIC7899: /* 7899 */ + if (PCI_FUNC(pdev->devfn) != 0) + { + temp_p->flags |= AHC_CHNLB; + } + /* + * The 7895 is the only chipset that sets the SCBSIZE32 param + * in the DEVCONFIG register. The Ultra2 chipsets use + * the DSCOMMAND0 register instead. + */ + if ((temp_p->chip & AHC_CHIPID_MASK) == AHC_AIC7895) + { + pci_read_config_dword(pdev, DEVCONFIG, &devconfig); + devconfig |= SCBSIZE32; + pci_write_config_dword(pdev, DEVCONFIG, devconfig); + } + break; + default: + break; + } + + /* + * Loading of the SEEPROM needs to come after we've set the flags + * to indicate possible CHNLB and CHNLC assigments. Otherwise, + * on 394x and 398x cards we'll end up reading the wrong settings + * for channels B and C + */ + switch (temp_p->chip & AHC_CHIPID_MASK) + { + case AHC_AIC7892: + case AHC_AIC7899: + aic_outb(temp_p, 0, SCAMCTL); + /* + * Switch to the alt mode of the chip... + */ + aic_outb(temp_p, aic_inb(temp_p, SFUNCT) | ALT_MODE, SFUNCT); + /* + * Set our options...the last two items set our CRC after x byte + * count in target mode... + */ + aic_outb(temp_p, AUTO_MSGOUT_DE | DIS_MSGIN_DUALEDGE, OPTIONMODE); + aic_outb(temp_p, 0x00, 0x0b); + aic_outb(temp_p, 0x10, 0x0a); + /* + * switch back to normal mode... + */ + aic_outb(temp_p, aic_inb(temp_p, SFUNCT) & ~ALT_MODE, SFUNCT); + aic_outb(temp_p, CRCVALCHKEN | CRCENDCHKEN | CRCREQCHKEN | + TARGCRCENDEN | TARGCRCCNTEN, + CRCCONTROL1); + aic_outb(temp_p, ((aic_inb(temp_p, DSCOMMAND0) | USCBSIZE32 | + MPARCKEN | CIOPARCKEN | CACHETHEN) & + ~DPARCKEN), DSCOMMAND0); + aic7xxx_load_seeprom(temp_p, &sxfrctl1); + break; + case AHC_AIC7890: + case AHC_AIC7896: + aic_outb(temp_p, 0, SCAMCTL); + aic_outb(temp_p, (aic_inb(temp_p, DSCOMMAND0) | + CACHETHEN | MPARCKEN | USCBSIZE32 | + CIOPARCKEN) & ~DPARCKEN, DSCOMMAND0); + aic7xxx_load_seeprom(temp_p, &sxfrctl1); + break; + case AHC_AIC7850: + case AHC_AIC7860: + /* + * Set the DSCOMMAND0 register on these cards different from + * on the 789x cards. Also, read the SEEPROM as well. + */ + aic_outb(temp_p, (aic_inb(temp_p, DSCOMMAND0) | + CACHETHEN | MPARCKEN) & ~DPARCKEN, + DSCOMMAND0); + /* FALLTHROUGH */ + default: + aic7xxx_load_seeprom(temp_p, &sxfrctl1); + break; + case AHC_AIC7880: + /* + * Check the rev of the chipset before we change DSCOMMAND0 + */ + pci_read_config_dword(pdev, DEVCONFIG, &devconfig); + if ((devconfig & 0xff) >= 1) + { + aic_outb(temp_p, (aic_inb(temp_p, DSCOMMAND0) | + CACHETHEN | MPARCKEN) & ~DPARCKEN, + DSCOMMAND0); + } + aic7xxx_load_seeprom(temp_p, &sxfrctl1); + break; + } + + + /* + * and then we need another switch based on the type in order to + * make sure the channel B primary flag is set properly on 7895 + * controllers....Arrrgggghhh!!! We also have to catch the fact + * that when you disable the BIOS on the 7895 on the Intel DK440LX + * motherboard, and possibly others, it only sets the BIOS disabled + * bit on the A channel...I think I'm starting to lean towards + * going postal.... + */ + switch(temp_p->chip & AHC_CHIPID_MASK) + { + case AHC_AIC7895: + case AHC_AIC7896: + case AHC_AIC7899: + current_p = list_p; + while(current_p != NULL) + { + if ( (current_p->pci_bus == temp_p->pci_bus) && + (PCI_SLOT(current_p->pci_device_fn) == + PCI_SLOT(temp_p->pci_device_fn)) ) + { + if ( PCI_FUNC(current_p->pci_device_fn) == 0 ) + { + temp_p->flags |= + (current_p->flags & AHC_CHANNEL_B_PRIMARY); + temp_p->flags &= ~(AHC_BIOS_ENABLED|AHC_USEDEFAULTS); + temp_p->flags |= + (current_p->flags & (AHC_BIOS_ENABLED|AHC_USEDEFAULTS)); + } + else + { + current_p->flags |= + (temp_p->flags & AHC_CHANNEL_B_PRIMARY); + current_p->flags &= ~(AHC_BIOS_ENABLED|AHC_USEDEFAULTS); + current_p->flags |= + (temp_p->flags & (AHC_BIOS_ENABLED|AHC_USEDEFAULTS)); + } + } + current_p = current_p->next; + } + break; + default: + break; + } + + /* + * We only support external SCB RAM on the 7895/6/7 chipsets. + * We could support it on the 7890/1 easy enough, but I don't + * know of any 7890/1 based cards that have it. I do know + * of 7895/6/7 cards that have it and they work properly. + */ + switch(temp_p->chip & AHC_CHIPID_MASK) + { + default: + break; + case AHC_AIC7895: + case AHC_AIC7896: + case AHC_AIC7899: + pci_read_config_dword(pdev, DEVCONFIG, &devconfig); + if (temp_p->features & AHC_ULTRA2) + { + if ( (aic_inb(temp_p, DSCOMMAND0) & RAMPSM_ULTRA2) && + (aic7xxx_scbram) ) + { + aic_outb(temp_p, + aic_inb(temp_p, DSCOMMAND0) & ~SCBRAMSEL_ULTRA2, + DSCOMMAND0); + temp_p->flags |= AHC_EXTERNAL_SRAM; + devconfig |= EXTSCBPEN; + } + else if (aic_inb(temp_p, DSCOMMAND0) & RAMPSM_ULTRA2) + { + printk(KERN_INFO "aic7xxx: <%s> at PCI %d/%d/%d\n", + board_names[aic_pdevs[i].board_name_index], + temp_p->pci_bus, + PCI_SLOT(temp_p->pci_device_fn), + PCI_FUNC(temp_p->pci_device_fn)); + printk("aic7xxx: external SCB RAM detected, " + "but not enabled\n"); + } + } + else + { + if ((devconfig & RAMPSM) && (aic7xxx_scbram)) + { + devconfig &= ~SCBRAMSEL; + devconfig |= EXTSCBPEN; + temp_p->flags |= AHC_EXTERNAL_SRAM; + } + else if (devconfig & RAMPSM) + { + printk(KERN_INFO "aic7xxx: <%s> at PCI %d/%d/%d\n", + board_names[aic_pdevs[i].board_name_index], + temp_p->pci_bus, + PCI_SLOT(temp_p->pci_device_fn), + PCI_FUNC(temp_p->pci_device_fn)); + printk("aic7xxx: external SCB RAM detected, " + "but not enabled\n"); + } + } + pci_write_config_dword(pdev, DEVCONFIG, devconfig); + if ( (temp_p->flags & AHC_EXTERNAL_SRAM) && + (temp_p->flags & AHC_CHNLB) ) + aic_outb(temp_p, 1, CCSCBBADDR); + break; + } + + /* + * Take the LED out of diagnostic mode + */ + aic_outb(temp_p, + (aic_inb(temp_p, SBLKCTL) & ~(DIAGLEDEN | DIAGLEDON)), + SBLKCTL); + + /* + * We don't know where this is set in the SEEPROM or by the + * BIOS, so we default to 100%. On Ultra2 controllers, use 75% + * instead. + */ + if (temp_p->features & AHC_ULTRA2) + { + aic_outb(temp_p, RD_DFTHRSH_MAX | WR_DFTHRSH_MAX, DFF_THRSH); + } + else + { + aic_outb(temp_p, DFTHRSH_100, DSPCISTATUS); + } + + /* + * Call our function to fixup any bugs that exist on this chipset. + * This may muck with PCI settings and other device settings, so + * make sure it's after all the other PCI and device register + * tweaks so it can back out bad settings on specific broken cards. + */ + aic7xxx_configure_bugs(temp_p); + + if ( list_p == NULL ) + { + list_p = current_p = temp_p; + } + else + { + current_p = list_p; + while(current_p->next != NULL) + current_p = current_p->next; + current_p->next = temp_p; + } + temp_p->next = NULL; + found++; + continue; +skip_pci_controller: +#ifdef CONFIG_PCI + pci_release_regions(temp_p->pdev); +#endif + kfree(temp_p); + } /* Found an Adaptec PCI device. */ + else /* Well, we found one, but we couldn't get any memory */ + { + printk("aic7xxx: Found <%s>\n", + board_names[aic_pdevs[i].board_name_index]); + printk(KERN_INFO "aic7xxx: Unable to allocate device memory, " + "skipping.\n"); + } + } /* while(pdev=....) */ + } /* for PCI_DEVICES */ + } +#endif /* CONFIG_PCI */ + +#if defined(__i386__) || defined(__alpha__) + /* + * EISA/VL-bus card signature probe. + */ + slot = MINSLOT; + while ( (slot <= MAXSLOT) && + !(aic7xxx_no_probe) ) + { + base = SLOTBASE(slot) + MINREG; + + if (!request_region(base, MAXREG - MINREG, "aic7xxx")) + { + /* + * Some other driver has staked a + * claim to this i/o region already. + */ + slot++; + continue; /* back to the beginning of the for loop */ + } + flags = 0; + type = aic7xxx_probe(slot, base + AHC_HID0, &flags); + if (type == -1) + { + release_region(base, MAXREG - MINREG); + slot++; + continue; + } + temp_p = kmalloc(sizeof(struct aic7xxx_host), GFP_ATOMIC); + if (temp_p == NULL) + { + printk(KERN_WARNING "aic7xxx: Unable to allocate device space.\n"); + release_region(base, MAXREG - MINREG); + slot++; + continue; /* back to the beginning of the while loop */ + } + + /* + * Pause the card preserving the IRQ type. Allow the operator + * to override the IRQ trigger. + */ + if (aic7xxx_irq_trigger == 1) + hcntrl = IRQMS; /* Level */ + else if (aic7xxx_irq_trigger == 0) + hcntrl = 0; /* Edge */ + else + hcntrl = inb(base + HCNTRL) & IRQMS; /* Default */ + memset(temp_p, 0, sizeof(struct aic7xxx_host)); + temp_p->unpause = hcntrl | INTEN; + temp_p->pause = hcntrl | PAUSE | INTEN; + temp_p->base = base; + temp_p->mbase = 0; + temp_p->maddr = NULL; + temp_p->pci_bus = 0; + temp_p->pci_device_fn = slot; + aic_outb(temp_p, hcntrl | PAUSE, HCNTRL); + while( (aic_inb(temp_p, HCNTRL) & PAUSE) == 0 ) ; + if (aic7xxx_chip_reset(temp_p) == -1) + temp_p->irq = 0; + else + temp_p->irq = aic_inb(temp_p, INTDEF) & 0x0F; + temp_p->flags |= AHC_PAGESCBS; + + switch (temp_p->irq) + { + case 9: + case 10: + case 11: + case 12: + case 14: + case 15: + break; + + default: + printk(KERN_WARNING "aic7xxx: Host adapter uses unsupported IRQ " + "level %d, ignoring.\n", temp_p->irq); + kfree(temp_p); + release_region(base, MAXREG - MINREG); + slot++; + continue; /* back to the beginning of the while loop */ + } + + /* + * We are commited now, everything has been checked and this card + * has been found, now we just set it up + */ + + /* + * Insert our new struct into the list at the end + */ + if (list_p == NULL) + { + list_p = current_p = temp_p; + } + else + { + current_p = list_p; + while (current_p->next != NULL) + current_p = current_p->next; + current_p->next = temp_p; + } + + switch (type) + { + case 0: + temp_p->board_name_index = 2; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk("aic7xxx: <%s> at EISA %d\n", + board_names[2], slot); + /* FALLTHROUGH */ + case 1: + { + temp_p->chip = AHC_AIC7770 | AHC_EISA; + temp_p->features |= AHC_AIC7770_FE; + temp_p->bios_control = aic_inb(temp_p, HA_274_BIOSCTRL); + + /* + * Get the primary channel information. Right now we don't + * do anything with this, but someday we will be able to inform + * the mid-level SCSI code which channel is primary. + */ + if (temp_p->board_name_index == 0) + { + temp_p->board_name_index = 3; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk("aic7xxx: <%s> at EISA %d\n", + board_names[3], slot); + } + if (temp_p->bios_control & CHANNEL_B_PRIMARY) + { + temp_p->flags |= AHC_CHANNEL_B_PRIMARY; + } + + if ((temp_p->bios_control & BIOSMODE) == BIOSDISABLED) + { + temp_p->flags &= ~AHC_BIOS_ENABLED; + } + else + { + temp_p->flags &= ~AHC_USEDEFAULTS; + temp_p->flags |= AHC_BIOS_ENABLED; + if ( (temp_p->bios_control & 0x20) == 0 ) + { + temp_p->bios_address = 0xcc000; + temp_p->bios_address += (0x4000 * (temp_p->bios_control & 0x07)); + } + else + { + temp_p->bios_address = 0xd0000; + temp_p->bios_address += (0x8000 * (temp_p->bios_control & 0x06)); + } + } + temp_p->adapter_control = aic_inb(temp_p, SCSICONF) << 8; + temp_p->adapter_control |= aic_inb(temp_p, SCSICONF + 1); + if (temp_p->features & AHC_WIDE) + { + temp_p->scsi_id = temp_p->adapter_control & HWSCSIID; + temp_p->scsi_id_b = temp_p->scsi_id; + } + else + { + temp_p->scsi_id = (temp_p->adapter_control >> 8) & HSCSIID; + temp_p->scsi_id_b = temp_p->adapter_control & HSCSIID; + } + aic7xxx_load_seeprom(temp_p, &sxfrctl1); + break; + } + + case 2: + case 3: + temp_p->chip = AHC_AIC7770 | AHC_VL; + temp_p->features |= AHC_AIC7770_FE; + if (type == 2) + temp_p->flags |= AHC_BIOS_ENABLED; + else + temp_p->flags &= ~AHC_BIOS_ENABLED; + if (aic_inb(temp_p, SCSICONF) & TERM_ENB) + sxfrctl1 = STPWEN; + aic7xxx_load_seeprom(temp_p, &sxfrctl1); + temp_p->board_name_index = 4; + if (aic7xxx_verbose & VERBOSE_PROBE2) + printk("aic7xxx: <%s> at VLB %d\n", + board_names[2], slot); + switch( aic_inb(temp_p, STATUS_2840) & BIOS_SEL ) + { + case 0x00: + temp_p->bios_address = 0xe0000; + break; + case 0x20: + temp_p->bios_address = 0xc8000; + break; + case 0x40: + temp_p->bios_address = 0xd0000; + break; + case 0x60: + temp_p->bios_address = 0xd8000; + break; + default: + break; /* can't get here */ + } + break; + + default: /* Won't get here. */ + break; + } + if (aic7xxx_verbose & VERBOSE_PROBE2) + { + printk(KERN_INFO "aic7xxx: BIOS %sabled, IO Port 0x%lx, IRQ %d (%s)\n", + (temp_p->flags & AHC_USEDEFAULTS) ? "dis" : "en", temp_p->base, + temp_p->irq, + (temp_p->pause & IRQMS) ? "level sensitive" : "edge triggered"); + printk(KERN_INFO "aic7xxx: Extended translation %sabled.\n", + (temp_p->flags & AHC_EXTEND_TRANS_A) ? "en" : "dis"); + } + + /* + * All the 7770 based chipsets have this bug + */ + temp_p->bugs |= AHC_BUG_TMODE_WIDEODD; + + /* + * Set the FIFO threshold and the bus off time. + */ + hostconf = aic_inb(temp_p, HOSTCONF); + aic_outb(temp_p, hostconf & DFTHRSH, BUSSPD); + aic_outb(temp_p, (hostconf << 2) & BOFF, BUSTIME); + slot++; + found++; + } + +#endif /* defined(__i386__) || defined(__alpha__) */ + + /* + * Now, we re-order the probed devices by BIOS address and BUS class. + * In general, we follow this algorithm to make the adapters show up + * in the same order under linux that the computer finds them. + * 1: All VLB/EISA cards with BIOS_ENABLED first, according to BIOS + * address, going from lowest to highest. + * 2: All PCI controllers with BIOS_ENABLED next, according to BIOS + * address, going from lowest to highest. + * 3: Remaining VLB/EISA controllers going in slot order. + * 4: Remaining PCI controllers, going in PCI device order (reversable) + */ + + { + struct aic7xxx_host *sort_list[4] = { NULL, NULL, NULL, NULL }; + struct aic7xxx_host *vlb, *pci; + struct aic7xxx_host *prev_p; + struct aic7xxx_host *p; + unsigned char left; + + prev_p = vlb = pci = NULL; + + temp_p = list_p; + while (temp_p != NULL) + { + switch(temp_p->chip & ~AHC_CHIPID_MASK) + { + case AHC_EISA: + case AHC_VL: + { + p = temp_p; + if (p->flags & AHC_BIOS_ENABLED) + vlb = sort_list[0]; + else + vlb = sort_list[2]; + + if (vlb == NULL) + { + vlb = temp_p; + temp_p = temp_p->next; + vlb->next = NULL; + } + else + { + current_p = vlb; + prev_p = NULL; + while ( (current_p != NULL) && + (current_p->bios_address < temp_p->bios_address)) + { + prev_p = current_p; + current_p = current_p->next; + } + if (prev_p != NULL) + { + prev_p->next = temp_p; + temp_p = temp_p->next; + prev_p->next->next = current_p; + } + else + { + vlb = temp_p; + temp_p = temp_p->next; + vlb->next = current_p; + } + } + + if (p->flags & AHC_BIOS_ENABLED) + sort_list[0] = vlb; + else + sort_list[2] = vlb; + + break; + } + default: /* All PCI controllers fall through to default */ + { + + p = temp_p; + if (p->flags & AHC_BIOS_ENABLED) + pci = sort_list[1]; + else + pci = sort_list[3]; + + if (pci == NULL) + { + pci = temp_p; + temp_p = temp_p->next; + pci->next = NULL; + } + else + { + current_p = pci; + prev_p = NULL; + if (!aic7xxx_reverse_scan) + { + while ( (current_p != NULL) && + ( (PCI_SLOT(current_p->pci_device_fn) | + (current_p->pci_bus << 8)) < + (PCI_SLOT(temp_p->pci_device_fn) | + (temp_p->pci_bus << 8)) ) ) + { + prev_p = current_p; + current_p = current_p->next; + } + } + else + { + while ( (current_p != NULL) && + ( (PCI_SLOT(current_p->pci_device_fn) | + (current_p->pci_bus << 8)) > + (PCI_SLOT(temp_p->pci_device_fn) | + (temp_p->pci_bus << 8)) ) ) + { + prev_p = current_p; + current_p = current_p->next; + } + } + /* + * Are we dealing with a 7895/6/7/9 where we need to sort the + * channels as well, if so, the bios_address values should + * be the same + */ + if ( (current_p) && (temp_p->flags & AHC_MULTI_CHANNEL) && + (temp_p->pci_bus == current_p->pci_bus) && + (PCI_SLOT(temp_p->pci_device_fn) == + PCI_SLOT(current_p->pci_device_fn)) ) + { + if (temp_p->flags & AHC_CHNLB) + { + if ( !(temp_p->flags & AHC_CHANNEL_B_PRIMARY) ) + { + prev_p = current_p; + current_p = current_p->next; + } + } + else + { + if (temp_p->flags & AHC_CHANNEL_B_PRIMARY) + { + prev_p = current_p; + current_p = current_p->next; + } + } + } + if (prev_p != NULL) + { + prev_p->next = temp_p; + temp_p = temp_p->next; + prev_p->next->next = current_p; + } + else + { + pci = temp_p; + temp_p = temp_p->next; + pci->next = current_p; + } + } + + if (p->flags & AHC_BIOS_ENABLED) + sort_list[1] = pci; + else + sort_list[3] = pci; + + break; + } + } /* End of switch(temp_p->type) */ + } /* End of while (temp_p != NULL) */ + /* + * At this point, the cards have been broken into 4 sorted lists, now + * we run through the lists in order and register each controller + */ + { + int i; + + left = found; + for (i=0; i<ARRAY_SIZE(sort_list); i++) + { + temp_p = sort_list[i]; + while(temp_p != NULL) + { + template->name = board_names[temp_p->board_name_index]; + p = aic7xxx_alloc(template, temp_p); + if (p != NULL) + { + p->instance = found - left; + if (aic7xxx_register(template, p, (--left)) == 0) + { + found--; + aic7xxx_release(p->host); + scsi_unregister(p->host); + } + else if (aic7xxx_dump_card) + { + pause_sequencer(p); + aic7xxx_print_card(p); + aic7xxx_print_scratch_ram(p); + unpause_sequencer(p, TRUE); + } + } + current_p = temp_p; + temp_p = (struct aic7xxx_host *)temp_p->next; + kfree(current_p); + } + } + } + } + return (found); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_buildscb + * + * Description: + * Build a SCB. + *-F*************************************************************************/ +static void +aic7xxx_buildscb(struct aic7xxx_host *p, Scsi_Cmnd *cmd, + struct aic7xxx_scb *scb) +{ + unsigned short mask; + struct aic7xxx_hwscb *hscb; + struct aic_dev_data *aic_dev = cmd->device->hostdata; + struct scsi_device *sdptr = cmd->device; + unsigned char tindex = TARGET_INDEX(cmd); + struct request *req = cmd->request; + + mask = (0x01 << tindex); + hscb = scb->hscb; + + /* + * Setup the control byte if we need negotiation and have not + * already requested it. + */ + hscb->control = 0; + scb->tag_action = 0; + + if (p->discenable & mask) + { + hscb->control |= DISCENB; + /* We always force TEST_UNIT_READY to untagged */ + if (cmd->cmnd[0] != TEST_UNIT_READY && sdptr->simple_tags) + { + if (req->flags & REQ_HARDBARRIER) + { + if(sdptr->ordered_tags) + { + hscb->control |= MSG_ORDERED_Q_TAG; + scb->tag_action = MSG_ORDERED_Q_TAG; + } + } + else + { + hscb->control |= MSG_SIMPLE_Q_TAG; + scb->tag_action = MSG_SIMPLE_Q_TAG; + } + } + } + if ( !(aic_dev->dtr_pending) && + (aic_dev->needppr || aic_dev->needwdtr || aic_dev->needsdtr) && + (aic_dev->flags & DEVICE_DTR_SCANNED) ) + { + aic_dev->dtr_pending = 1; + scb->tag_action = 0; + hscb->control &= DISCENB; + hscb->control |= MK_MESSAGE; + if(aic_dev->needppr) + { + scb->flags |= SCB_MSGOUT_PPR; + } + else if(aic_dev->needwdtr) + { + scb->flags |= SCB_MSGOUT_WDTR; + } + else if(aic_dev->needsdtr) + { + scb->flags |= SCB_MSGOUT_SDTR; + } + scb->flags |= SCB_DTR_SCB; + } + hscb->target_channel_lun = ((cmd->device->id << 4) & 0xF0) | + ((cmd->device->channel & 0x01) << 3) | (cmd->device->lun & 0x07); + + /* + * The interpretation of request_buffer and request_bufflen + * changes depending on whether or not use_sg is zero; a + * non-zero use_sg indicates the number of elements in the + * scatter-gather array. + */ + + /* + * XXX - this relies on the host data being stored in a + * little-endian format. + */ + hscb->SCSI_cmd_length = cmd->cmd_len; + memcpy(scb->cmnd, cmd->cmnd, cmd->cmd_len); + hscb->SCSI_cmd_pointer = cpu_to_le32(SCB_DMA_ADDR(scb, scb->cmnd)); + + if (cmd->use_sg) + { + struct scatterlist *sg; /* Must be mid-level SCSI code scatterlist */ + + /* + * We must build an SG list in adapter format, as the kernel's SG list + * cannot be used directly because of data field size (__alpha__) + * differences and the kernel SG list uses virtual addresses where + * we need physical addresses. + */ + int i, use_sg; + + sg = (struct scatterlist *)cmd->request_buffer; + scb->sg_length = 0; + use_sg = pci_map_sg(p->pdev, sg, cmd->use_sg, scsi_to_pci_dma_dir(cmd->sc_data_direction)); + /* + * Copy the segments into the SG array. NOTE!!! - We used to + * have the first entry both in the data_pointer area and the first + * SG element. That has changed somewhat. We still have the first + * entry in both places, but now we download the address of + * scb->sg_list[1] instead of 0 to the sg pointer in the hscb. + */ + for (i = 0; i < use_sg; i++) + { + unsigned int len = sg_dma_len(sg+i); + scb->sg_list[i].address = cpu_to_le32(sg_dma_address(sg+i)); + scb->sg_list[i].length = cpu_to_le32(len); + scb->sg_length += len; + } + /* Copy the first SG into the data pointer area. */ + hscb->data_pointer = scb->sg_list[0].address; + hscb->data_count = scb->sg_list[0].length; + scb->sg_count = i; + hscb->SG_segment_count = i; + hscb->SG_list_pointer = cpu_to_le32(SCB_DMA_ADDR(scb, &scb->sg_list[1])); + } + else + { + if (cmd->request_bufflen) + { + unsigned int address = pci_map_single(p->pdev, cmd->request_buffer, + cmd->request_bufflen, + scsi_to_pci_dma_dir(cmd->sc_data_direction)); + aic7xxx_mapping(cmd) = address; + scb->sg_list[0].address = cpu_to_le32(address); + scb->sg_list[0].length = cpu_to_le32(cmd->request_bufflen); + scb->sg_count = 1; + scb->sg_length = cmd->request_bufflen; + hscb->SG_segment_count = 1; + hscb->SG_list_pointer = cpu_to_le32(SCB_DMA_ADDR(scb, &scb->sg_list[0])); + hscb->data_count = scb->sg_list[0].length; + hscb->data_pointer = scb->sg_list[0].address; + } + else + { + scb->sg_count = 0; + scb->sg_length = 0; + hscb->SG_segment_count = 0; + hscb->SG_list_pointer = 0; + hscb->data_count = 0; + hscb->data_pointer = 0; + } + } +} + +/*+F************************************************************************* + * Function: + * aic7xxx_queue + * + * Description: + * Queue a SCB to the controller. + *-F*************************************************************************/ +static int +aic7xxx_queue(Scsi_Cmnd *cmd, void (*fn)(Scsi_Cmnd *)) +{ + struct aic7xxx_host *p; + struct aic7xxx_scb *scb; + struct aic_dev_data *aic_dev; + + p = (struct aic7xxx_host *) cmd->device->host->hostdata; + + aic_dev = cmd->device->hostdata; +#ifdef AIC7XXX_VERBOSE_DEBUGGING + if (aic_dev->active_cmds > aic_dev->max_q_depth) + { + printk(WARN_LEAD "Commands queued exceeds queue " + "depth, active=%d\n", + p->host_no, CTL_OF_CMD(cmd), + aic_dev->active_cmds); + } +#endif + + scb = scbq_remove_head(&p->scb_data->free_scbs); + if (scb == NULL) + { + aic7xxx_allocate_scb(p); + scb = scbq_remove_head(&p->scb_data->free_scbs); + if(scb == NULL) + { + printk(WARN_LEAD "Couldn't get a free SCB.\n", p->host_no, + CTL_OF_CMD(cmd)); + return 1; + } + } + scb->cmd = cmd; + + /* + * Make sure the Scsi_Cmnd pointer is saved, the struct it points to + * is set up properly, and the parity error flag is reset, then send + * the SCB to the sequencer and watch the fun begin. + */ + aic7xxx_position(cmd) = scb->hscb->tag; + cmd->scsi_done = fn; + cmd->result = DID_OK; + memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); + aic7xxx_error(cmd) = DID_OK; + aic7xxx_status(cmd) = 0; + cmd->host_scribble = NULL; + + /* + * Construct the SCB beforehand, so the sequencer is + * paused a minimal amount of time. + */ + aic7xxx_buildscb(p, cmd, scb); + + scb->flags |= SCB_ACTIVE | SCB_WAITINGQ; + + scbq_insert_tail(&p->waiting_scbs, scb); + aic7xxx_run_waiting_queues(p); + return (0); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_bus_device_reset + * + * Description: + * Abort or reset the current SCSI command(s). If the scb has not + * previously been aborted, then we attempt to send a BUS_DEVICE_RESET + * message to the target. If the scb has previously been unsuccessfully + * aborted, then we will reset the channel and have all devices renegotiate. + * Returns an enumerated type that indicates the status of the operation. + *-F*************************************************************************/ +static int +aic7xxx_bus_device_reset(Scsi_Cmnd *cmd) +{ + struct aic7xxx_host *p; + struct aic7xxx_scb *scb; + struct aic7xxx_hwscb *hscb; + int channel; + unsigned char saved_scbptr, lastphase; + unsigned char hscb_index; + int disconnected; + struct aic_dev_data *aic_dev; + + if(cmd == NULL) + { + printk(KERN_ERR "aic7xxx_bus_device_reset: called with NULL cmd!\n"); + return FAILED; + } + p = (struct aic7xxx_host *)cmd->device->host->hostdata; + aic_dev = AIC_DEV(cmd); + if(aic7xxx_position(cmd) < p->scb_data->numscbs) + scb = (p->scb_data->scb_array[aic7xxx_position(cmd)]); + else + return FAILED; + + hscb = scb->hscb; + + aic7xxx_isr(p->irq, (void *)p, NULL); + aic7xxx_done_cmds_complete(p); + /* If the command was already complete or just completed, then we didn't + * do a reset, return FAILED */ + if(!(scb->flags & SCB_ACTIVE)) + return FAILED; + + pause_sequencer(p); + lastphase = aic_inb(p, LASTPHASE); + if (aic7xxx_verbose & VERBOSE_RESET_PROCESS) + { + printk(INFO_LEAD "Bus Device reset, scb flags 0x%x, ", + p->host_no, CTL_OF_SCB(scb), scb->flags); + switch (lastphase) + { + case P_DATAOUT: + printk("Data-Out phase\n"); + break; + case P_DATAIN: + printk("Data-In phase\n"); + break; + case P_COMMAND: + printk("Command phase\n"); + break; + case P_MESGOUT: + printk("Message-Out phase\n"); + break; + case P_STATUS: + printk("Status phase\n"); + break; + case P_MESGIN: + printk("Message-In phase\n"); + break; + default: + /* + * We're not in a valid phase, so assume we're idle. + */ + printk("while idle, LASTPHASE = 0x%x\n", lastphase); + break; + } + printk(INFO_LEAD "SCSISIGI 0x%x, SEQADDR 0x%x, SSTAT0 0x%x, SSTAT1 " + "0x%x\n", p->host_no, CTL_OF_SCB(scb), + aic_inb(p, SCSISIGI), + aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8), + aic_inb(p, SSTAT0), aic_inb(p, SSTAT1)); + printk(INFO_LEAD "SG_CACHEPTR 0x%x, SSTAT2 0x%x, STCNT 0x%x\n", p->host_no, + CTL_OF_SCB(scb), + (p->features & AHC_ULTRA2) ? aic_inb(p, SG_CACHEPTR) : 0, + aic_inb(p, SSTAT2), + aic_inb(p, STCNT + 2) << 16 | aic_inb(p, STCNT + 1) << 8 | + aic_inb(p, STCNT)); + } + + channel = cmd->device->channel; + + /* + * Send a Device Reset Message: + * The target that is holding up the bus may not be the same as + * the one that triggered this timeout (different commands have + * different timeout lengths). Our strategy here is to queue an + * abort message to the timed out target if it is disconnected. + * Otherwise, if we have an active target we stuff the message buffer + * with an abort message and assert ATN in the hopes that the target + * will let go of the bus and go to the mesgout phase. If this + * fails, we'll get another timeout a few seconds later which will + * attempt a bus reset. + */ + saved_scbptr = aic_inb(p, SCBPTR); + disconnected = FALSE; + + if (lastphase != P_BUSFREE) + { + if (aic_inb(p, SCB_TAG) >= p->scb_data->numscbs) + { + printk(WARN_LEAD "Invalid SCB ID %d is active, " + "SCB flags = 0x%x.\n", p->host_no, + CTL_OF_CMD(cmd), scb->hscb->tag, scb->flags); + unpause_sequencer(p, FALSE); + return FAILED; + } + if (scb->hscb->tag == aic_inb(p, SCB_TAG)) + { + if ( (lastphase == P_MESGOUT) || (lastphase == P_MESGIN) ) + { + printk(WARN_LEAD "Device reset, Message buffer " + "in use\n", p->host_no, CTL_OF_SCB(scb)); + unpause_sequencer(p, FALSE); + return FAILED; + } + + if (aic7xxx_verbose & VERBOSE_RESET_PROCESS) + printk(INFO_LEAD "Device reset message in " + "message buffer\n", p->host_no, CTL_OF_SCB(scb)); + scb->flags |= SCB_RESET | SCB_DEVICE_RESET; + aic7xxx_error(cmd) = DID_RESET; + aic_dev->flags |= BUS_DEVICE_RESET_PENDING; + /* Send the abort message to the active SCB. */ + aic_outb(p, HOST_MSG, MSG_OUT); + aic_outb(p, lastphase | ATNO, SCSISIGO); + unpause_sequencer(p, FALSE); + spin_unlock_irq(p->host->host_lock); + ssleep(1); + spin_lock_irq(p->host->host_lock); + if(aic_dev->flags & BUS_DEVICE_RESET_PENDING) + return FAILED; + else + return SUCCESS; + } + } /* if (last_phase != P_BUSFREE).....indicates we are idle and can work */ + /* + * Simply set the MK_MESSAGE flag and the SEQINT handler will do + * the rest on a reconnect/connect. + */ + scb->hscb->control |= MK_MESSAGE; + scb->flags |= SCB_RESET | SCB_DEVICE_RESET; + aic_dev->flags |= BUS_DEVICE_RESET_PENDING; + /* + * Check to see if the command is on the qinfifo. If it is, then we will + * not need to queue the command again since the card should start it soon + */ + if (aic7xxx_search_qinfifo(p, cmd->device->channel, cmd->device->id, cmd->device->lun, hscb->tag, + 0, TRUE, NULL) == 0) + { + disconnected = TRUE; + if ((hscb_index = aic7xxx_find_scb(p, scb)) != SCB_LIST_NULL) + { + unsigned char scb_control; + + aic_outb(p, hscb_index, SCBPTR); + scb_control = aic_inb(p, SCB_CONTROL); + /* + * If the DISCONNECTED bit is not set in SCB_CONTROL, then we are + * actually on the waiting list, not disconnected, and we don't + * need to requeue the command. + */ + disconnected = (scb_control & DISCONNECTED); + aic_outb(p, scb_control | MK_MESSAGE, SCB_CONTROL); + } + if (disconnected) + { + /* + * Actually requeue this SCB in case we can select the + * device before it reconnects. This can result in the command + * being on the qinfifo twice, but we don't care because it will + * all get cleaned up if/when the reset takes place. + */ + if (aic7xxx_verbose & VERBOSE_RESET_PROCESS) + printk(INFO_LEAD "Queueing device reset command.\n", p->host_no, + CTL_OF_SCB(scb)); + p->qinfifo[p->qinfifonext++] = scb->hscb->tag; + if (p->features & AHC_QUEUE_REGS) + aic_outb(p, p->qinfifonext, HNSCB_QOFF); + else + aic_outb(p, p->qinfifonext, KERNEL_QINPOS); + scb->flags |= SCB_QUEUED_ABORT; + } + } + aic_outb(p, saved_scbptr, SCBPTR); + unpause_sequencer(p, FALSE); + spin_unlock_irq(p->host->host_lock); + msleep(1000/4); + spin_lock_irq(p->host->host_lock); + if(aic_dev->flags & BUS_DEVICE_RESET_PENDING) + return FAILED; + else + return SUCCESS; +} + + +/*+F************************************************************************* + * Function: + * aic7xxx_panic_abort + * + * Description: + * Abort the current SCSI command(s). + *-F*************************************************************************/ +static void +aic7xxx_panic_abort(struct aic7xxx_host *p, Scsi_Cmnd *cmd) +{ + + printk("aic7xxx driver version %s\n", AIC7XXX_C_VERSION); + printk("Controller type:\n %s\n", board_names[p->board_name_index]); + printk("p->flags=0x%lx, p->chip=0x%x, p->features=0x%x, " + "sequencer %s paused\n", + p->flags, p->chip, p->features, + (aic_inb(p, HCNTRL) & PAUSE) ? "is" : "isn't" ); + pause_sequencer(p); + disable_irq(p->irq); + aic7xxx_print_card(p); + aic7xxx_print_scratch_ram(p); + spin_unlock_irq(p->host->host_lock); + for(;;) barrier(); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_abort + * + * Description: + * Abort the current SCSI command(s). + *-F*************************************************************************/ +static int +aic7xxx_abort(Scsi_Cmnd *cmd) +{ + struct aic7xxx_scb *scb = NULL; + struct aic7xxx_host *p; + int found=0, disconnected; + unsigned char saved_hscbptr, hscbptr, scb_control; + struct aic_dev_data *aic_dev; + + if(cmd == NULL) + { + printk(KERN_ERR "aic7xxx_abort: called with NULL cmd!\n"); + return FAILED; + } + p = (struct aic7xxx_host *)cmd->device->host->hostdata; + aic_dev = AIC_DEV(cmd); + if(aic7xxx_position(cmd) < p->scb_data->numscbs) + scb = (p->scb_data->scb_array[aic7xxx_position(cmd)]); + else + return FAILED; + + aic7xxx_isr(p->irq, (void *)p, NULL); + aic7xxx_done_cmds_complete(p); + /* If the command was already complete or just completed, then we didn't + * do a reset, return FAILED */ + if(!(scb->flags & SCB_ACTIVE)) + return FAILED; + + pause_sequencer(p); + + /* + * I added a new config option to the driver: "panic_on_abort" that will + * cause the driver to panic and the machine to stop on the first abort + * or reset call into the driver. At that point, it prints out a lot of + * useful information for me which I can then use to try and debug the + * problem. Simply enable the boot time prompt in order to activate this + * code. + */ + if (aic7xxx_panic_on_abort) + aic7xxx_panic_abort(p, cmd); + + if (aic7xxx_verbose & VERBOSE_ABORT) + { + printk(INFO_LEAD "Aborting scb %d, flags 0x%x, SEQADDR 0x%x, LASTPHASE " + "0x%x\n", + p->host_no, CTL_OF_SCB(scb), scb->hscb->tag, scb->flags, + aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8), + aic_inb(p, LASTPHASE)); + printk(INFO_LEAD "SG_CACHEPTR 0x%x, SG_COUNT %d, SCSISIGI 0x%x\n", + p->host_no, CTL_OF_SCB(scb), (p->features & AHC_ULTRA2) ? + aic_inb(p, SG_CACHEPTR) : 0, aic_inb(p, SG_COUNT), + aic_inb(p, SCSISIGI)); + printk(INFO_LEAD "SSTAT0 0x%x, SSTAT1 0x%x, SSTAT2 0x%x\n", + p->host_no, CTL_OF_SCB(scb), aic_inb(p, SSTAT0), + aic_inb(p, SSTAT1), aic_inb(p, SSTAT2)); + } + + if (scb->flags & SCB_WAITINGQ) + { + if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS) + printk(INFO_LEAD "SCB found on waiting list and " + "aborted.\n", p->host_no, CTL_OF_SCB(scb)); + scbq_remove(&p->waiting_scbs, scb); + scbq_remove(&aic_dev->delayed_scbs, scb); + aic_dev->active_cmds++; + p->activescbs++; + scb->flags &= ~(SCB_WAITINGQ | SCB_ACTIVE); + scb->flags |= SCB_ABORT | SCB_QUEUED_FOR_DONE; + goto success; + } + +/* + * We just checked the waiting_q, now for the QINFIFO + */ + if ( ((found = aic7xxx_search_qinfifo(p, cmd->device->id, cmd->device->channel, + cmd->device->lun, scb->hscb->tag, SCB_ABORT | SCB_QUEUED_FOR_DONE, + FALSE, NULL)) != 0) && + (aic7xxx_verbose & VERBOSE_ABORT_PROCESS)) + { + printk(INFO_LEAD "SCB found in QINFIFO and aborted.\n", p->host_no, + CTL_OF_SCB(scb)); + goto success; + } + +/* + * QINFIFO, waitingq, completeq done. Next, check WAITING_SCB list in card + */ + + saved_hscbptr = aic_inb(p, SCBPTR); + if ((hscbptr = aic7xxx_find_scb(p, scb)) != SCB_LIST_NULL) + { + aic_outb(p, hscbptr, SCBPTR); + scb_control = aic_inb(p, SCB_CONTROL); + disconnected = scb_control & DISCONNECTED; + /* + * If the DISCONNECTED bit is not set in SCB_CONTROL, then we are + * either currently active or on the waiting list. + */ + if(!disconnected && aic_inb(p, LASTPHASE) == P_BUSFREE) { + if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS) + printk(INFO_LEAD "SCB found on hardware waiting" + " list and aborted.\n", p->host_no, CTL_OF_SCB(scb)); + /* If we are the only waiting command, stop the selection engine */ + if (aic_inb(p, WAITING_SCBH) == hscbptr && aic_inb(p, SCB_NEXT) == + SCB_LIST_NULL) + { + aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ); + aic_outb(p, CLRSELTIMEO, CLRSINT1); + aic_outb(p, SCB_LIST_NULL, WAITING_SCBH); + } + else + { + unsigned char prev, next; + prev = SCB_LIST_NULL; + next = aic_inb(p, WAITING_SCBH); + while(next != SCB_LIST_NULL) + { + aic_outb(p, next, SCBPTR); + if (next == hscbptr) + { + next = aic_inb(p, SCB_NEXT); + if (prev != SCB_LIST_NULL) + { + aic_outb(p, prev, SCBPTR); + aic_outb(p, next, SCB_NEXT); + } + else + aic_outb(p, next, WAITING_SCBH); + aic_outb(p, hscbptr, SCBPTR); + next = SCB_LIST_NULL; + } + else + { + prev = next; + next = aic_inb(p, SCB_NEXT); + } + } + } + aic_outb(p, SCB_LIST_NULL, SCB_TAG); + aic_outb(p, 0, SCB_CONTROL); + aic7xxx_add_curscb_to_free_list(p); + scb->flags = SCB_ABORT | SCB_QUEUED_FOR_DONE; + goto success; + } + else if (!disconnected) + { + /* + * We are the currently active command + */ + if((aic_inb(p, LASTPHASE) == P_MESGIN) || + (aic_inb(p, LASTPHASE) == P_MESGOUT)) + { + /* + * Message buffer busy, unable to abort + */ + printk(INFO_LEAD "message buffer busy, unable to abort.\n", + p->host_no, CTL_OF_SCB(scb)); + unpause_sequencer(p, FALSE); + return FAILED; + } + /* Fallthrough to below, set ATNO after we set SCB_CONTROL */ + } + aic_outb(p, scb_control | MK_MESSAGE, SCB_CONTROL); + if(!disconnected) + { + aic_outb(p, HOST_MSG, MSG_OUT); + aic_outb(p, aic_inb(p, SCSISIGI) | ATNO, SCSISIGO); + } + aic_outb(p, saved_hscbptr, SCBPTR); + } + else + { + /* + * The scb isn't in the card at all and it is active and it isn't in + * any of the queues, so it must be disconnected and paged out. Fall + * through to the code below. + */ + disconnected = 1; + } + + p->flags |= AHC_ABORT_PENDING; + scb->flags |= SCB_QUEUED_ABORT | SCB_ABORT | SCB_RECOVERY_SCB; + scb->hscb->control |= MK_MESSAGE; + if(disconnected) + { + if (aic7xxx_verbose & VERBOSE_ABORT_PROCESS) + printk(INFO_LEAD "SCB disconnected. Queueing Abort" + " SCB.\n", p->host_no, CTL_OF_SCB(scb)); + p->qinfifo[p->qinfifonext++] = scb->hscb->tag; + if (p->features & AHC_QUEUE_REGS) + aic_outb(p, p->qinfifonext, HNSCB_QOFF); + else + aic_outb(p, p->qinfifonext, KERNEL_QINPOS); + } + unpause_sequencer(p, FALSE); + spin_unlock_irq(p->host->host_lock); + msleep(1000/4); + spin_lock_irq(p->host->host_lock); + if (p->flags & AHC_ABORT_PENDING) + { + if (aic7xxx_verbose & VERBOSE_ABORT_RETURN) + printk(INFO_LEAD "Abort never delivered, returning FAILED\n", p->host_no, + CTL_OF_CMD(cmd)); + p->flags &= ~AHC_ABORT_PENDING; + return FAILED; + } + if (aic7xxx_verbose & VERBOSE_ABORT_RETURN) + printk(INFO_LEAD "Abort successful.\n", p->host_no, CTL_OF_CMD(cmd)); + return SUCCESS; + +success: + if (aic7xxx_verbose & VERBOSE_ABORT_RETURN) + printk(INFO_LEAD "Abort successful.\n", p->host_no, CTL_OF_CMD(cmd)); + aic7xxx_run_done_queue(p, TRUE); + unpause_sequencer(p, FALSE); + return SUCCESS; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_reset + * + * Description: + * Resetting the bus always succeeds - is has to, otherwise the + * kernel will panic! Try a surgical technique - sending a BUS + * DEVICE RESET message - on the offending target before pulling + * the SCSI bus reset line. + *-F*************************************************************************/ +static int +aic7xxx_reset(Scsi_Cmnd *cmd) +{ + struct aic7xxx_scb *scb; + struct aic7xxx_host *p; + struct aic_dev_data *aic_dev; + + p = (struct aic7xxx_host *) cmd->device->host->hostdata; + aic_dev = AIC_DEV(cmd); + if(aic7xxx_position(cmd) < p->scb_data->numscbs) + { + scb = (p->scb_data->scb_array[aic7xxx_position(cmd)]); + if (scb->cmd != cmd) + scb = NULL; + } + else + { + scb = NULL; + } + + /* + * I added a new config option to the driver: "panic_on_abort" that will + * cause the driver to panic and the machine to stop on the first abort + * or reset call into the driver. At that point, it prints out a lot of + * useful information for me which I can then use to try and debug the + * problem. Simply enable the boot time prompt in order to activate this + * code. + */ + if (aic7xxx_panic_on_abort) + aic7xxx_panic_abort(p, cmd); + + pause_sequencer(p); + + while((aic_inb(p, INTSTAT) & INT_PEND) && !(p->flags & AHC_IN_ISR)) + { + aic7xxx_isr(p->irq, p, (void *)NULL ); + pause_sequencer(p); + } + aic7xxx_done_cmds_complete(p); + + if(scb && (scb->cmd == NULL)) + { + /* + * We just completed the command when we ran the isr stuff, so we no + * longer have it. + */ + unpause_sequencer(p, FALSE); + return SUCCESS; + } + +/* + * By this point, we want to already know what we are going to do and + * only have the following code implement our course of action. + */ + aic7xxx_reset_channel(p, cmd->device->channel, TRUE); + if (p->features & AHC_TWIN) + { + aic7xxx_reset_channel(p, cmd->device->channel ^ 0x01, TRUE); + restart_sequencer(p); + } + aic_outb(p, aic_inb(p, SIMODE1) & ~(ENREQINIT|ENBUSFREE), SIMODE1); + aic7xxx_clear_intstat(p); + p->flags &= ~AHC_HANDLING_REQINITS; + p->msg_type = MSG_TYPE_NONE; + p->msg_index = 0; + p->msg_len = 0; + aic7xxx_run_done_queue(p, TRUE); + unpause_sequencer(p, FALSE); + spin_unlock_irq(p->host->host_lock); + ssleep(2); + spin_lock_irq(p->host->host_lock); + return SUCCESS; +} + +/*+F************************************************************************* + * Function: + * aic7xxx_biosparam + * + * Description: + * Return the disk geometry for the given SCSI device. + * + * Note: + * This function is broken for today's really large drives and needs + * fixed. + *-F*************************************************************************/ +static int +aic7xxx_biosparam(struct scsi_device *sdev, struct block_device *bdev, + sector_t capacity, int geom[]) +{ + sector_t heads, sectors, cylinders; + int ret; + struct aic7xxx_host *p; + unsigned char *buf; + + p = (struct aic7xxx_host *) sdev->host->hostdata; + buf = scsi_bios_ptable(bdev); + + if ( buf ) + { + ret = scsi_partsize(buf, capacity, &geom[2], &geom[0], &geom[1]); + kfree(buf); + if ( ret != -1 ) + return(ret); + } + + heads = 64; + sectors = 32; + cylinders = capacity >> 11; + + if ((p->flags & AHC_EXTEND_TRANS_A) && (cylinders > 1024)) + { + heads = 255; + sectors = 63; + cylinders = capacity >> 14; + if(capacity > (65535 * heads * sectors)) + cylinders = 65535; + else + cylinders = ((unsigned int)capacity) / (unsigned int)(heads * sectors); + } + + geom[0] = (int)heads; + geom[1] = (int)sectors; + geom[2] = (int)cylinders; + + return (0); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_release + * + * Description: + * Free the passed in Scsi_Host memory structures prior to unloading the + * module. + *-F*************************************************************************/ +static int +aic7xxx_release(struct Scsi_Host *host) +{ + struct aic7xxx_host *p = (struct aic7xxx_host *) host->hostdata; + struct aic7xxx_host *next, *prev; + + if(p->irq) + free_irq(p->irq, p); +#ifdef MMAPIO + if(p->maddr) + { + iounmap(p->maddr); + } +#endif /* MMAPIO */ + if(!p->pdev) + release_region(p->base, MAXREG - MINREG); +#ifdef CONFIG_PCI + else + pci_release_regions(p->pdev); +#endif + prev = NULL; + next = first_aic7xxx; + while(next != NULL) + { + if(next == p) + { + if(prev == NULL) + first_aic7xxx = next->next; + else + prev->next = next->next; + } + else + { + prev = next; + } + next = next->next; + } + aic7xxx_free(p); + return(0); +} + +/*+F************************************************************************* + * Function: + * aic7xxx_print_card + * + * Description: + * Print out all of the control registers on the card + * + * NOTE: This function is not yet safe for use on the VLB and EISA + * controllers, so it isn't used on those controllers at all. + *-F*************************************************************************/ +static void +aic7xxx_print_card(struct aic7xxx_host *p) +{ + int i, j, k, chip; + static struct register_ranges { + int num_ranges; + int range_val[32]; + } cards_ds[] = { + { 0, {0,} }, /* none */ + {10, {0x00, 0x05, 0x08, 0x11, 0x18, 0x19, 0x1f, 0x1f, 0x60, 0x60, /*7771*/ + 0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9b, 0x9f} }, + { 9, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7850*/ + 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} }, + { 9, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7860*/ + 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} }, + {10, {0x00, 0x05, 0x08, 0x11, 0x18, 0x19, 0x1c, 0x1f, 0x60, 0x60, /*7870*/ + 0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} }, + {10, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1a, 0x1c, 0x1f, 0x60, 0x60, /*7880*/ + 0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9f} }, + {16, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7890*/ + 0x84, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, 0x9f, 0x9f, + 0xe0, 0xf1, 0xf4, 0xf4, 0xf6, 0xf6, 0xf8, 0xf8, 0xfa, 0xfc, + 0xfe, 0xff} }, + {12, {0x00, 0x05, 0x08, 0x11, 0x18, 0x19, 0x1b, 0x1f, 0x60, 0x60, /*7895*/ + 0x62, 0x66, 0x80, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, + 0x9f, 0x9f, 0xe0, 0xf1} }, + {16, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7896*/ + 0x84, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, 0x9f, 0x9f, + 0xe0, 0xf1, 0xf4, 0xf4, 0xf6, 0xf6, 0xf8, 0xf8, 0xfa, 0xfc, + 0xfe, 0xff} }, + {12, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7892*/ + 0x84, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, 0x9c, 0x9f, + 0xe0, 0xf1, 0xf4, 0xfc} }, + {12, {0x00, 0x05, 0x08, 0x11, 0x18, 0x1f, 0x60, 0x60, 0x62, 0x66, /*7899*/ + 0x84, 0x8e, 0x90, 0x95, 0x97, 0x97, 0x9a, 0x9a, 0x9c, 0x9f, + 0xe0, 0xf1, 0xf4, 0xfc} }, + }; + chip = p->chip & AHC_CHIPID_MASK; + printk("%s at ", + board_names[p->board_name_index]); + switch(p->chip & ~AHC_CHIPID_MASK) + { + case AHC_VL: + printk("VLB Slot %d.\n", p->pci_device_fn); + break; + case AHC_EISA: + printk("EISA Slot %d.\n", p->pci_device_fn); + break; + case AHC_PCI: + default: + printk("PCI %d/%d/%d.\n", p->pci_bus, PCI_SLOT(p->pci_device_fn), + PCI_FUNC(p->pci_device_fn)); + break; + } + + /* + * the registers on the card.... + */ + printk("Card Dump:\n"); + k = 0; + for(i=0; i<cards_ds[chip].num_ranges; i++) + { + for(j = cards_ds[chip].range_val[ i * 2 ]; + j <= cards_ds[chip].range_val[ i * 2 + 1 ] ; + j++) + { + printk("%02x:%02x ", j, aic_inb(p, j)); + if(++k == 13) + { + printk("\n"); + k=0; + } + } + } + if(k != 0) + printk("\n"); + + /* + * If this was an Ultra2 controller, then we just hosed the card in terms + * of the QUEUE REGS. This function is only called at init time or by + * the panic_abort function, so it's safe to assume a generic init time + * setting here + */ + + if(p->features & AHC_QUEUE_REGS) + { + aic_outb(p, 0, SDSCB_QOFF); + aic_outb(p, 0, SNSCB_QOFF); + aic_outb(p, 0, HNSCB_QOFF); + } + +} + +/*+F************************************************************************* + * Function: + * aic7xxx_print_scratch_ram + * + * Description: + * Print out the scratch RAM values on the card. + *-F*************************************************************************/ +static void +aic7xxx_print_scratch_ram(struct aic7xxx_host *p) +{ + int i, k; + + k = 0; + printk("Scratch RAM:\n"); + for(i = SRAM_BASE; i < SEQCTL; i++) + { + printk("%02x:%02x ", i, aic_inb(p, i)); + if(++k == 13) + { + printk("\n"); + k=0; + } + } + if (p->features & AHC_MORE_SRAM) + { + for(i = TARG_OFFSET; i < 0x80; i++) + { + printk("%02x:%02x ", i, aic_inb(p, i)); + if(++k == 13) + { + printk("\n"); + k=0; + } + } + } + printk("\n"); +} + + +#include "aic7xxx_old/aic7xxx_proc.c" + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_VERSION(AIC7XXX_H_VERSION); + + +static Scsi_Host_Template driver_template = { + .proc_info = aic7xxx_proc_info, + .detect = aic7xxx_detect, + .release = aic7xxx_release, + .info = aic7xxx_info, + .queuecommand = aic7xxx_queue, + .slave_alloc = aic7xxx_slave_alloc, + .slave_configure = aic7xxx_slave_configure, + .slave_destroy = aic7xxx_slave_destroy, + .bios_param = aic7xxx_biosparam, + .eh_abort_handler = aic7xxx_abort, + .eh_device_reset_handler = aic7xxx_bus_device_reset, + .eh_host_reset_handler = aic7xxx_reset, + .can_queue = 255, + .this_id = -1, + .max_sectors = 2048, + .cmd_per_lun = 3, + .use_clustering = ENABLE_CLUSTERING, +}; + +#include "scsi_module.c" + +/* + * Overrides for Emacs so that we almost follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-indent-level: 2 + * c-brace-imaginary-offset: 0 + * c-brace-offset: -2 + * c-argdecl-indent: 2 + * c-label-offset: -2 + * c-continued-statement-offset: 2 + * c-continued-brace-offset: 0 + * indent-tabs-mode: nil + * tab-width: 8 + * End: + */ |