diff options
Diffstat (limited to 'drivers/scsi/dc395x.c')
| -rw-r--r-- | drivers/scsi/dc395x.c | 4942 |
1 files changed, 4942 insertions, 0 deletions
diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c new file mode 100644 index 00000000000..cca41cf8d3e --- /dev/null +++ b/drivers/scsi/dc395x.c @@ -0,0 +1,4942 @@ +/* + * dc395x.c + * + * Device Driver for Tekram DC395(U/UW/F), DC315(U) + * PCI SCSI Bus Master Host Adapter + * (SCSI chip set used Tekram ASIC TRM-S1040) + * + * Authors: + * C.L. Huang <ching@tekram.com.tw> + * Erich Chen <erich@tekram.com.tw> + * (C) Copyright 1995-1999 Tekram Technology Co., Ltd. + * + * Kurt Garloff <garloff@suse.de> + * (C) 1999-2000 Kurt Garloff + * + * Oliver Neukum <oliver@neukum.name> + * Ali Akcaagac <aliakc@web.de> + * Jamie Lenehan <lenehan@twibble.org> + * (C) 2003 + * + * License: GNU GPL + * + ************************************************************************* + * + * 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. + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + * + ************************************************************************ + */ +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/delay.h> +#include <linux/ctype.h> +#include <linux/blkdev.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/spinlock.h> +#include <linux/pci.h> +#include <linux/list.h> +#include <linux/vmalloc.h> +#include <asm/io.h> + +#include <scsi/scsi.h> +#include <scsi/scsicam.h> /* needed for scsicam_bios_param */ +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_host.h> + +#include "dc395x.h" + +#define DC395X_NAME "dc395x" +#define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040" +#define DC395X_VERSION "v2.05, 2004/03/08" + +/*--------------------------------------------------------------------------- + Features + ---------------------------------------------------------------------------*/ +/* + * Set to disable parts of the driver + */ +/*#define DC395x_NO_DISCONNECT*/ +/*#define DC395x_NO_TAGQ*/ +/*#define DC395x_NO_SYNC*/ +/*#define DC395x_NO_WIDE*/ + +/*--------------------------------------------------------------------------- + Debugging + ---------------------------------------------------------------------------*/ +/* + * Types of debugging that can be enabled and disabled + */ +#define DBG_KG 0x0001 +#define DBG_0 0x0002 +#define DBG_1 0x0004 +#define DBG_SG 0x0020 +#define DBG_FIFO 0x0040 +#define DBG_PIO 0x0080 + + +/* + * Set set of things to output debugging for. + * Undefine to remove all debugging + */ +/*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/ +/*#define DEBUG_MASK DBG_0*/ + + +/* + * Output a kernel mesage at the specified level and append the + * driver name and a ": " to the start of the message + */ +#define dprintkl(level, format, arg...) \ + printk(level DC395X_NAME ": " format , ## arg) + + +#ifdef DEBUG_MASK +/* + * print a debug message - this is formated with KERN_DEBUG, then the + * driver name followed by a ": " and then the message is output. + * This also checks that the specified debug level is enabled before + * outputing the message + */ +#define dprintkdbg(type, format, arg...) \ + do { \ + if ((type) & (DEBUG_MASK)) \ + dprintkl(KERN_DEBUG , format , ## arg); \ + } while (0) + +/* + * Check if the specified type of debugging is enabled + */ +#define debug_enabled(type) ((DEBUG_MASK) & (type)) + +#else +/* + * No debugging. Do nothing + */ +#define dprintkdbg(type, format, arg...) \ + do {} while (0) +#define debug_enabled(type) (0) + +#endif + + +#ifndef PCI_VENDOR_ID_TEKRAM +#define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */ +#endif +#ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040 +#define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */ +#endif + + +#define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags) +#define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags) + +#define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address))) +#define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address))) +#define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address))) +#define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address)) +#define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address)) +#define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address)) + +/* cmd->result */ +#define RES_TARGET 0x000000FF /* Target State */ +#define RES_TARGET_LNX STATUS_MASK /* Only official ... */ +#define RES_ENDMSG 0x0000FF00 /* End Message */ +#define RES_DID 0x00FF0000 /* DID_ codes */ +#define RES_DRV 0xFF000000 /* DRIVER_ codes */ + +#define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)) +#define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1) + +#define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); } +#define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; } +#define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; } +#define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; } +#define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; } + +#define TAG_NONE 255 + +/* + * srb->segement_x is the hw sg list. It is always allocated as a + * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not + * cross a page boundy. + */ +#define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY) +#define VIRTX_LEN (sizeof(void *) * DC395x_MAX_SG_LISTENTRY) + +struct SGentry { + u32 address; /* bus! address */ + u32 length; +}; + +/* The SEEPROM structure for TRM_S1040 */ +struct NVRamTarget { + u8 cfg0; /* Target configuration byte 0 */ + u8 period; /* Target period */ + u8 cfg2; /* Target configuration byte 2 */ + u8 cfg3; /* Target configuration byte 3 */ +}; + +struct NvRamType { + u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */ + u8 sub_sys_id[2]; /* 2,3 Sub System ID */ + u8 sub_class; /* 4 Sub Class */ + u8 vendor_id[2]; /* 5,6 Vendor ID */ + u8 device_id[2]; /* 7,8 Device ID */ + u8 reserved; /* 9 Reserved */ + struct NVRamTarget target[DC395x_MAX_SCSI_ID]; + /** 10,11,12,13 + ** 14,15,16,17 + ** .... + ** .... + ** 70,71,72,73 + */ + u8 scsi_id; /* 74 Host Adapter SCSI ID */ + u8 channel_cfg; /* 75 Channel configuration */ + u8 delay_time; /* 76 Power on delay time */ + u8 max_tag; /* 77 Maximum tags */ + u8 reserved0; /* 78 */ + u8 boot_target; /* 79 */ + u8 boot_lun; /* 80 */ + u8 reserved1; /* 81 */ + u16 reserved2[22]; /* 82,..125 */ + u16 cksum; /* 126,127 */ +}; + +struct ScsiReqBlk { + struct list_head list; /* next/prev ptrs for srb lists */ + struct DeviceCtlBlk *dcb; + struct scsi_cmnd *cmd; + + struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */ + u32 sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */ + + u8 sg_count; /* No of HW sg entries for this request */ + u8 sg_index; /* Index of HW sg entry for this request */ + u32 total_xfer_length; /* Total number of bytes remaining to be transfered */ + void **virt_map; + unsigned char *virt_addr; /* Virtual address of current transfer position */ + + /* + * The sense buffer handling function, request_sense, uses + * the first hw sg entry (segment_x[0]) and the transfer + * length (total_xfer_length). While doing this it stores the + * original values into the last sg hw list + * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the + * total_xfer_length in xferred. These values are restored in + * pci_unmap_srb_sense. This is the only place xferred is used. + */ + u32 xferred; /* Saved copy of total_xfer_length */ + + u16 state; + + u8 msgin_buf[6]; + u8 msgout_buf[6]; + + u8 adapter_status; + u8 target_status; + u8 msg_count; + u8 end_message; + + u8 tag_number; + u8 status; + u8 retry_count; + u8 flag; + + u8 scsi_phase; +}; + +struct DeviceCtlBlk { + struct list_head list; /* next/prev ptrs for the dcb list */ + struct AdapterCtlBlk *acb; + struct list_head srb_going_list; /* head of going srb list */ + struct list_head srb_waiting_list; /* head of waiting srb list */ + + struct ScsiReqBlk *active_srb; + u32 tag_mask; + + u16 max_command; + + u8 target_id; /* SCSI Target ID (SCSI Only) */ + u8 target_lun; /* SCSI Log. Unit (SCSI Only) */ + u8 identify_msg; + u8 dev_mode; + + u8 inquiry7; /* To store Inquiry flags */ + u8 sync_mode; /* 0:async mode */ + u8 min_nego_period; /* for nego. */ + u8 sync_period; /* for reg. */ + + u8 sync_offset; /* for reg. and nego.(low nibble) */ + u8 flag; + u8 dev_type; + u8 init_tcq_flag; +}; + +struct AdapterCtlBlk { + struct Scsi_Host *scsi_host; + + unsigned long io_port_base; + unsigned long io_port_len; + + struct list_head dcb_list; /* head of going dcb list */ + struct DeviceCtlBlk *dcb_run_robin; + struct DeviceCtlBlk *active_dcb; + + struct list_head srb_free_list; /* head of free srb list */ + struct ScsiReqBlk *tmp_srb; + struct timer_list waiting_timer; + struct timer_list selto_timer; + + u16 srb_count; + + u8 sel_timeout; + + unsigned int irq_level; + u8 tag_max_num; + u8 acb_flag; + u8 gmode2; + + u8 config; + u8 lun_chk; + u8 scan_devices; + u8 hostid_bit; + + u8 dcb_map[DC395x_MAX_SCSI_ID]; + struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32]; + + struct pci_dev *dev; + + u8 msg_len; + + struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT]; + struct ScsiReqBlk srb; + + struct NvRamType eeprom; /* eeprom settings for this adapter */ +}; + + +/*--------------------------------------------------------------------------- + Forward declarations + ---------------------------------------------------------------------------*/ +static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status); +static void set_basic_config(struct AdapterCtlBlk *acb); +static void cleanup_after_transfer(struct AdapterCtlBlk *acb, + struct ScsiReqBlk *srb); +static void reset_scsi_bus(struct AdapterCtlBlk *acb); +static void data_io_transfer(struct AdapterCtlBlk *acb, + struct ScsiReqBlk *srb, u16 io_dir); +static void disconnect(struct AdapterCtlBlk *acb); +static void reselect(struct AdapterCtlBlk *acb); +static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb); +static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, + struct ScsiReqBlk *srb); +static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb); +static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code, + struct scsi_cmnd *cmd, u8 force); +static void scsi_reset_detect(struct AdapterCtlBlk *acb); +static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb); +static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, + struct ScsiReqBlk *srb); +static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb); +static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb); +static void set_xfer_rate(struct AdapterCtlBlk *acb, + struct DeviceCtlBlk *dcb); +static void waiting_timeout(unsigned long ptr); + + +/*--------------------------------------------------------------------------- + Static Data + ---------------------------------------------------------------------------*/ +static u16 current_sync_offset = 0; + +static void *dc395x_scsi_phase0[] = { + data_out_phase0,/* phase:0 */ + data_in_phase0, /* phase:1 */ + command_phase0, /* phase:2 */ + status_phase0, /* phase:3 */ + nop0, /* phase:4 PH_BUS_FREE .. initial phase */ + nop0, /* phase:5 PH_BUS_FREE .. initial phase */ + msgout_phase0, /* phase:6 */ + msgin_phase0, /* phase:7 */ +}; + +static void *dc395x_scsi_phase1[] = { + data_out_phase1,/* phase:0 */ + data_in_phase1, /* phase:1 */ + command_phase1, /* phase:2 */ + status_phase1, /* phase:3 */ + nop1, /* phase:4 PH_BUS_FREE .. initial phase */ + nop1, /* phase:5 PH_BUS_FREE .. initial phase */ + msgout_phase1, /* phase:6 */ + msgin_phase1, /* phase:7 */ +}; + +/* + *Fast20: 000 50ns, 20.0 MHz + * 001 75ns, 13.3 MHz + * 010 100ns, 10.0 MHz + * 011 125ns, 8.0 MHz + * 100 150ns, 6.6 MHz + * 101 175ns, 5.7 MHz + * 110 200ns, 5.0 MHz + * 111 250ns, 4.0 MHz + * + *Fast40(LVDS): 000 25ns, 40.0 MHz + * 001 50ns, 20.0 MHz + * 010 75ns, 13.3 MHz + * 011 100ns, 10.0 MHz + * 100 125ns, 8.0 MHz + * 101 150ns, 6.6 MHz + * 110 175ns, 5.7 MHz + * 111 200ns, 5.0 MHz + */ +/*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/ + +/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */ +static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 }; +static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 }; + + +/*--------------------------------------------------------------------------- + Configuration + ---------------------------------------------------------------------------*/ +/* + * Module/boot parameters currently effect *all* instances of the + * card in the system. + */ + +/* + * Command line parameters are stored in a structure below. + * These are the index's into the structure for the various + * command line options. + */ +#define CFG_ADAPTER_ID 0 +#define CFG_MAX_SPEED 1 +#define CFG_DEV_MODE 2 +#define CFG_ADAPTER_MODE 3 +#define CFG_TAGS 4 +#define CFG_RESET_DELAY 5 + +#define CFG_NUM 6 /* number of configuration items */ + + +/* + * Value used to indicate that a command line override + * hasn't been used to modify the value. + */ +#define CFG_PARAM_UNSET -1 + + +/* + * Hold command line parameters. + */ +struct ParameterData { + int value; /* value of this setting */ + int min; /* minimum value */ + int max; /* maximum value */ + int def; /* default value */ + int safe; /* safe value */ +}; +static struct ParameterData __devinitdata cfg_data[] = { + { /* adapter id */ + CFG_PARAM_UNSET, + 0, + 15, + 7, + 7 + }, + { /* max speed */ + CFG_PARAM_UNSET, + 0, + 7, + 1, /* 13.3Mhz */ + 4, /* 6.7Hmz */ + }, + { /* dev mode */ + CFG_PARAM_UNSET, + 0, + 0x3f, + NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO | + NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING | + NTC_DO_SEND_START, + NTC_DO_PARITY_CHK | NTC_DO_SEND_START + }, + { /* adapter mode */ + CFG_PARAM_UNSET, + 0, + 0x2f, +#ifdef CONFIG_SCSI_MULTI_LUN + NAC_SCANLUN | +#endif + NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET + /*| NAC_ACTIVE_NEG*/, + NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08 + }, + { /* tags */ + CFG_PARAM_UNSET, + 0, + 5, + 3, /* 16 tags (??) */ + 2, + }, + { /* reset delay */ + CFG_PARAM_UNSET, + 0, + 180, + 1, /* 1 second */ + 10, /* 10 seconds */ + } +}; + + +/* + * Safe settings. If set to zero the the BIOS/default values with + * command line overrides will be used. If set to 1 then safe and + * slow settings will be used. + */ +static int use_safe_settings = 0; +module_param_named(safe, use_safe_settings, bool, 0); +MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false"); + + +module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0); +MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)"); + +module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0); +MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz"); + +module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0); +MODULE_PARM_DESC(dev_mode, "Device mode."); + +module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0); +MODULE_PARM_DESC(adapter_mode, "Adapter mode."); + +module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0); +MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)"); + +module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0); +MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)"); + + +/** + * set_safe_settings - if the use_safe_settings option is set then + * set all values to the safe and slow values. + **/ +static void __devinit set_safe_settings(void) +{ + if (use_safe_settings) + { + int i; + + dprintkl(KERN_INFO, "Using safe settings.\n"); + for (i = 0; i < CFG_NUM; i++) + { + cfg_data[i].value = cfg_data[i].safe; + } + } +} + + +/** + * fix_settings - reset any boot parameters which are out of range + * back to the default values. + **/ +static void __devinit fix_settings(void) +{ + int i; + + dprintkdbg(DBG_1, + "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x " + "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n", + cfg_data[CFG_ADAPTER_ID].value, + cfg_data[CFG_MAX_SPEED].value, + cfg_data[CFG_DEV_MODE].value, + cfg_data[CFG_ADAPTER_MODE].value, + cfg_data[CFG_TAGS].value, + cfg_data[CFG_RESET_DELAY].value); + for (i = 0; i < CFG_NUM; i++) + { + if (cfg_data[i].value < cfg_data[i].min + || cfg_data[i].value > cfg_data[i].max) + cfg_data[i].value = cfg_data[i].def; + } +} + + + +/* + * Mapping from the eeprom delay index value (index into this array) + * to the the number of actual seconds that the delay should be for. + */ +static char __devinitdata eeprom_index_to_delay_map[] = + { 1, 3, 5, 10, 16, 30, 60, 120 }; + + +/** + * eeprom_index_to_delay - Take the eeprom delay setting and convert it + * into a number of seconds. + * + * @eeprom: The eeprom structure in which we find the delay index to map. + **/ +static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom) +{ + eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time]; +} + + +/** + * delay_to_eeprom_index - Take a delay in seconds and return the + * closest eeprom index which will delay for at least that amount of + * seconds. + * + * @delay: The delay, in seconds, to find the eeprom index for. + **/ +static int __devinit delay_to_eeprom_index(int delay) +{ + u8 idx = 0; + while (idx < 7 && eeprom_index_to_delay_map[idx] < delay) + idx++; + return idx; +} + + +/** + * eeprom_override - Override the eeprom settings, in the provided + * eeprom structure, with values that have been set on the command + * line. + * + * @eeprom: The eeprom data to override with command line options. + **/ +static void __devinit eeprom_override(struct NvRamType *eeprom) +{ + u8 id; + + /* Adapter Settings */ + if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET) + eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value; + + if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET) + eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value; + + if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET) + eeprom->delay_time = delay_to_eeprom_index( + cfg_data[CFG_RESET_DELAY].value); + + if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET) + eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value; + + /* Device Settings */ + for (id = 0; id < DC395x_MAX_SCSI_ID; id++) { + if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET) + eeprom->target[id].cfg0 = + (u8)cfg_data[CFG_DEV_MODE].value; + + if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET) + eeprom->target[id].period = + (u8)cfg_data[CFG_MAX_SPEED].value; + + } +} + + +/*--------------------------------------------------------------------------- + ---------------------------------------------------------------------------*/ + +static unsigned int list_size(struct list_head *head) +{ + unsigned int count = 0; + struct list_head *pos; + list_for_each(pos, head) + count++; + return count; +} + + +static struct DeviceCtlBlk *dcb_get_next(struct list_head *head, + struct DeviceCtlBlk *pos) +{ + int use_next = 0; + struct DeviceCtlBlk* next = NULL; + struct DeviceCtlBlk* i; + + if (list_empty(head)) + return NULL; + + /* find supplied dcb and then select the next one */ + list_for_each_entry(i, head, list) + if (use_next) { + next = i; + break; + } else if (i == pos) { + use_next = 1; + } + /* if no next one take the head one (ie, wraparound) */ + if (!next) + list_for_each_entry(i, head, list) { + next = i; + break; + } + + return next; +} + + +static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) +{ + if (srb->tag_number < 255) { + dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */ + srb->tag_number = 255; + } +} + + +/* Find cmd in SRB list */ +inline static struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd, + struct list_head *head) +{ + struct ScsiReqBlk *i; + list_for_each_entry(i, head, list) + if (i->cmd == cmd) + return i; + return NULL; +} + + +static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb) +{ + struct list_head *head = &acb->srb_free_list; + struct ScsiReqBlk *srb = NULL; + + if (!list_empty(head)) { + srb = list_entry(head->next, struct ScsiReqBlk, list); + list_del(head->next); + dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb); + } + return srb; +} + + +static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) +{ + dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb); + list_add_tail(&srb->list, &acb->srb_free_list); +} + + +static void srb_waiting_insert(struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb) +{ + dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n", + srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); + list_add(&srb->list, &dcb->srb_waiting_list); +} + + +static void srb_waiting_append(struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb) +{ + dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n", + srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); + list_add_tail(&srb->list, &dcb->srb_waiting_list); +} + + +static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) +{ + dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n", + srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); + list_add_tail(&srb->list, &dcb->srb_going_list); +} + + +static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) +{ + struct ScsiReqBlk *i; + struct ScsiReqBlk *tmp; + dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n", + srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); + + list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list) + if (i == srb) { + list_del(&srb->list); + break; + } +} + + +static void srb_waiting_remove(struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb) +{ + struct ScsiReqBlk *i; + struct ScsiReqBlk *tmp; + dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n", + srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); + + list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list) + if (i == srb) { + list_del(&srb->list); + break; + } +} + + +static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb) +{ + dprintkdbg(DBG_0, + "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n", + srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); + list_move(&srb->list, &dcb->srb_waiting_list); +} + + +static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb) +{ + dprintkdbg(DBG_0, + "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n", + srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); + list_move(&srb->list, &dcb->srb_going_list); +} + + +/* Sets the timer to wake us up */ +static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) +{ + if (timer_pending(&acb->waiting_timer)) + return; + init_timer(&acb->waiting_timer); + acb->waiting_timer.function = waiting_timeout; + acb->waiting_timer.data = (unsigned long) acb; + if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2)) + acb->waiting_timer.expires = + acb->scsi_host->last_reset - HZ / 2 + 1; + else + acb->waiting_timer.expires = jiffies + to + 1; + add_timer(&acb->waiting_timer); +} + + +/* Send the next command from the waiting list to the bus */ +static void waiting_process_next(struct AdapterCtlBlk *acb) +{ + struct DeviceCtlBlk *start = NULL; + struct DeviceCtlBlk *pos; + struct DeviceCtlBlk *dcb; + struct ScsiReqBlk *srb; + struct list_head *dcb_list_head = &acb->dcb_list; + + if (acb->active_dcb + || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) + return; + + if (timer_pending(&acb->waiting_timer)) + del_timer(&acb->waiting_timer); + + if (list_empty(dcb_list_head)) + return; + + /* + * Find the starting dcb. Need to find it again in the list + * since the list may have changed since we set the ptr to it + */ + list_for_each_entry(dcb, dcb_list_head, list) + if (dcb == acb->dcb_run_robin) { + start = dcb; + break; + } + if (!start) { + /* This can happen! */ + start = list_entry(dcb_list_head->next, typeof(*start), list); + acb->dcb_run_robin = start; + } + + + /* + * Loop over the dcb, but we start somewhere (potentially) in + * the middle of the loop so we need to manully do this. + */ + pos = start; + do { + struct list_head *waiting_list_head = &pos->srb_waiting_list; + + /* Make sure, the next another device gets scheduled ... */ + acb->dcb_run_robin = dcb_get_next(dcb_list_head, + acb->dcb_run_robin); + + if (list_empty(waiting_list_head) || + pos->max_command <= list_size(&pos->srb_going_list)) { + /* move to next dcb */ + pos = dcb_get_next(dcb_list_head, pos); + } else { + srb = list_entry(waiting_list_head->next, + struct ScsiReqBlk, list); + + /* Try to send to the bus */ + if (!start_scsi(acb, pos, srb)) + srb_waiting_to_going_move(pos, srb); + else + waiting_set_timer(acb, HZ/50); + break; + } + } while (pos != start); +} + + +/* Wake up waiting queue */ +static void waiting_timeout(unsigned long ptr) +{ + unsigned long flags; + struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; + dprintkdbg(DBG_1, + "waiting_timeout: Queue woken up by timer. acb=%p\n", acb); + DC395x_LOCK_IO(acb->scsi_host, flags); + waiting_process_next(acb); + DC395x_UNLOCK_IO(acb->scsi_host, flags); +} + + +/* Get the DCB for a given ID/LUN combination */ +static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun) +{ + return acb->children[id][lun]; +} + + +/* Send SCSI Request Block (srb) to adapter (acb) */ +static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) +{ + struct DeviceCtlBlk *dcb = srb->dcb; + + if (dcb->max_command <= list_size(&dcb->srb_going_list) || + acb->active_dcb || + (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { + srb_waiting_append(dcb, srb); + waiting_process_next(acb); + return; + } + + if (!start_scsi(acb, dcb, srb)) + srb_going_append(dcb, srb); + else { + srb_waiting_insert(dcb, srb); + waiting_set_timer(acb, HZ / 50); + } +} + + +/* Prepare SRB for being sent to Device DCB w/ command *cmd */ +static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb) +{ + enum dma_data_direction dir = cmd->sc_data_direction; + dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n", + cmd->pid, dcb->target_id, dcb->target_lun); + + srb->dcb = dcb; + srb->cmd = cmd; + srb->sg_count = 0; + srb->total_xfer_length = 0; + srb->sg_bus_addr = 0; + srb->virt_addr = NULL; + srb->sg_index = 0; + srb->adapter_status = 0; + srb->target_status = 0; + srb->msg_count = 0; + srb->status = 0; + srb->flag = 0; + srb->state = 0; + srb->retry_count = 0; + srb->tag_number = TAG_NONE; + srb->scsi_phase = PH_BUS_FREE; /* initial phase */ + srb->end_message = 0; + + if (dir == PCI_DMA_NONE || !cmd->request_buffer) { + dprintkdbg(DBG_0, + "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", + cmd->bufflen, cmd->request_buffer, + cmd->use_sg, srb->segment_x[0].address); + } else if (cmd->use_sg) { + int i; + u32 reqlen = cmd->request_bufflen; + struct scatterlist *sl = (struct scatterlist *) + cmd->request_buffer; + struct SGentry *sgp = srb->segment_x; + srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg, + dir); + dprintkdbg(DBG_0, + "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", + reqlen, cmd->request_buffer, cmd->use_sg, + srb->sg_count); + + for (i = 0; i < srb->sg_count; i++) { + u32 seglen = (u32)sg_dma_len(sl + i); + sgp[i].address = (u32)sg_dma_address(sl + i); + sgp[i].length = seglen; + srb->total_xfer_length += seglen; + srb->virt_map[i] = kmap(sl[i].page); + } + srb->virt_addr = srb->virt_map[0]; + sgp += srb->sg_count - 1; + + /* + * adjust last page if too big as it is allocated + * on even page boundaries + */ + if (srb->total_xfer_length > reqlen) { + sgp->length -= (srb->total_xfer_length - reqlen); + srb->total_xfer_length = reqlen; + } + + /* Fixup for WIDE padding - make sure length is even */ + if (dcb->sync_period & WIDE_SYNC && + srb->total_xfer_length % 2) { + srb->total_xfer_length++; + sgp->length++; + } + + srb->sg_bus_addr = pci_map_single(dcb->acb->dev, + srb->segment_x, + SEGMENTX_LEN, + PCI_DMA_TODEVICE); + + dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", + srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); + } else { + srb->total_xfer_length = cmd->request_bufflen; + srb->sg_count = 1; + srb->segment_x[0].address = + pci_map_single(dcb->acb->dev, cmd->request_buffer, + srb->total_xfer_length, dir); + + /* Fixup for WIDE padding - make sure length is even */ + if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2) + srb->total_xfer_length++; + + srb->segment_x[0].length = srb->total_xfer_length; + srb->virt_addr = cmd->request_buffer; + dprintkdbg(DBG_0, + "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n", + srb->total_xfer_length, cmd->request_buffer, + cmd->use_sg, srb->segment_x[0].address); + } +} + + +/** + * dc395x_queue_command - queue scsi command passed from the mid + * layer, invoke 'done' on completion + * + * @cmd: pointer to scsi command object + * @done: function pointer to be invoked on completion + * + * Returns 1 if the adapter (host) is busy, else returns 0. One + * reason for an adapter to be busy is that the number + * of outstanding queued commands is already equal to + * struct Scsi_Host::can_queue . + * + * Required: if struct Scsi_Host::can_queue is ever non-zero + * then this function is required. + * + * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") + * and is expected to be held on return. + * + **/ +static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) +{ + struct DeviceCtlBlk *dcb; + struct ScsiReqBlk *srb; + struct AdapterCtlBlk *acb = + (struct AdapterCtlBlk *)cmd->device->host->hostdata; + dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n", + cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); + + /* Assume BAD_TARGET; will be cleared later */ + cmd->result = DID_BAD_TARGET << 16; + + /* ignore invalid targets */ + if (cmd->device->id >= acb->scsi_host->max_id || + cmd->device->lun >= acb->scsi_host->max_lun || + cmd->device->lun >31) { + goto complete; + } + + /* does the specified lun on the specified device exist */ + if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { + dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", + cmd->device->id, cmd->device->lun); + goto complete; + } + + /* do we have a DCB for the device */ + dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); + if (!dcb) { + /* should never happen */ + dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", + cmd->device->id, cmd->device->lun); + goto complete; + } + + /* set callback and clear result in the command */ + cmd->scsi_done = done; + cmd->result = 0; + + srb = srb_get_free(acb); + if (!srb) + { + /* + * Return 1 since we are unable to queue this command at this + * point in time. + */ + dprintkdbg(DBG_0, "queue_command: No free srb's\n"); + return 1; + } + + build_srb(cmd, dcb, srb); + + if (!list_empty(&dcb->srb_waiting_list)) { + /* append to waiting queue */ + srb_waiting_append(dcb, srb); + waiting_process_next(acb); + } else { + /* process immediately */ + send_srb(acb, srb); + } + dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid); + return 0; + +complete: + /* + * Complete the command immediatey, and then return 0 to + * indicate that we have handled the command. This is usually + * done when the commad is for things like non existent + * devices. + */ + done(cmd); + return 0; +} + + +/* + * Return the disk geometry for the given SCSI device. + */ +static int dc395x_bios_param(struct scsi_device *sdev, + struct block_device *bdev, sector_t capacity, int *info) +{ +#ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP + int heads, sectors, cylinders; + struct AdapterCtlBlk *acb; + int size = capacity; + + dprintkdbg(DBG_0, "dc395x_bios_param..............\n"); + acb = (struct AdapterCtlBlk *)sdev->host->hostdata; + heads = 64; + sectors = 32; + cylinders = size / (heads * sectors); + + if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) { + heads = 255; + sectors = 63; + cylinders = size / (heads * sectors); + } + geom[0] = heads; + geom[1] = sectors; + geom[2] = cylinders; + return 0; +#else + return scsicam_bios_param(bdev, capacity, info); +#endif +} + + +static void dump_register_info(struct AdapterCtlBlk *acb, + struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) +{ + u16 pstat; + struct pci_dev *dev = acb->dev; + pci_read_config_word(dev, PCI_STATUS, &pstat); + if (!dcb) + dcb = acb->active_dcb; + if (!srb && dcb) + srb = dcb->active_srb; + if (srb) { + if (!srb->cmd) + dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", + srb, srb->cmd); + else + dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) " + "cmnd=0x%02x <%02i-%i>\n", + srb, srb->cmd, srb->cmd->pid, + srb->cmd->cmnd[0], srb->cmd->device->id, + srb->cmd->device->lun); + printk(" sglist=%p cnt=%i idx=%i len=%i\n", + srb->segment_x, srb->sg_count, srb->sg_index, + srb->total_xfer_length); + printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", + srb->state, srb->status, srb->scsi_phase, + (acb->active_dcb) ? "" : "not"); + } + dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " + "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " + "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " + "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", + DC395x_read16(acb, TRM_S1040_SCSI_STATUS), + DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), + DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), + DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), + DC395x_read8(acb, TRM_S1040_SCSI_SYNC), + DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), + DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), + DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), + DC395x_read8(acb, TRM_S1040_SCSI_INTEN), + DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), + DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), + DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), + DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); + dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " + "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " + "ctctr=0x%08x addr=0x%08x:0x%08x}\n", + DC395x_read16(acb, TRM_S1040_DMA_COMMAND), + DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), + DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), + DC395x_read8(acb, TRM_S1040_DMA_STATUS), + DC395x_read8(acb, TRM_S1040_DMA_INTEN), + DC395x_read16(acb, TRM_S1040_DMA_CONFIG), + DC395x_read32(acb, TRM_S1040_DMA_XCNT), + DC395x_read32(acb, TRM_S1040_DMA_CXCNT), + DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), + DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); + dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " + "pci{status=0x%04x}\n", + DC395x_read8(acb, TRM_S1040_GEN_CONTROL), + DC395x_read8(acb, TRM_S1040_GEN_STATUS), + DC395x_read8(acb, TRM_S1040_GEN_TIMER), + pstat); +} + + +static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) +{ +#if debug_enabled(DBG_FIFO) + u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); + u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); + if (!(fifocnt & 0x40)) + dprintkdbg(DBG_FIFO, + "clear_fifo: (%i bytes) on phase %02x in %s\n", + fifocnt & 0x3f, lines, txt); +#endif + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); +} + + +static void reset_dev_param(struct AdapterCtlBlk *acb) +{ + struct DeviceCtlBlk *dcb; + struct NvRamType *eeprom = &acb->eeprom; + dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); + + list_for_each_entry(dcb, &acb->dcb_list, list) { + u8 period_index; + + dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); + dcb->sync_period = 0; + dcb->sync_offset = 0; + + dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; + period_index = eeprom->target[dcb->target_id].period & 0x07; + dcb->min_nego_period = clock_period[period_index]; + if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) + || !(acb->config & HCC_WIDE_CARD)) + dcb->sync_mode &= ~WIDE_NEGO_ENABLE; + } +} + + +/* + * perform a hard reset on the SCSI bus + * @cmd - some command for this host (for fetching hooks) + * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). + */ +static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) +{ + struct AdapterCtlBlk *acb = + (struct AdapterCtlBlk *)cmd->device->host->hostdata; + dprintkl(KERN_INFO, + "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n", + cmd->pid, cmd->device->id, cmd->device->lun, cmd); + + if (timer_pending(&acb->waiting_timer)) + del_timer(&acb->waiting_timer); + + /* + * disable interrupt + */ + DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); + DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); + DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); + DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); + + reset_scsi_bus(acb); + udelay(500); + + /* We may be in serious trouble. Wait some seconds */ + acb->scsi_host->last_reset = + jiffies + 3 * HZ / 2 + + HZ * acb->eeprom.delay_time; + + /* + * re-enable interrupt + */ + /* Clear SCSI FIFO */ + DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); + clear_fifo(acb, "eh_bus_reset"); + /* Delete pending IRQ */ + DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); + set_basic_config(acb); + + reset_dev_param(acb); + doing_srb_done(acb, DID_RESET, cmd, 0); + acb->active_dcb = NULL; + acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ + waiting_process_next(acb); + + return SUCCESS; +} + + +/* + * abort an errant SCSI command + * @cmd - command to be aborted + * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). + */ +static int dc395x_eh_abort(struct scsi_cmnd *cmd) +{ + /* + * Look into our command queues: If it has not been sent already, + * we remove it and return success. Otherwise fail. + */ + struct AdapterCtlBlk *acb = + (struct AdapterCtlBlk *)cmd->device->host->hostdata; + struct DeviceCtlBlk *dcb; + struct ScsiReqBlk *srb; + dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n", + cmd->pid, cmd->device->id, cmd->device->lun, cmd); + + dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); + if (!dcb) { + dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); + return FAILED; + } + + srb = find_cmd(cmd, &dcb->srb_waiting_list); + if (srb) { + srb_waiting_remove(dcb, srb); + pci_unmap_srb_sense(acb, srb); + pci_unmap_srb(acb, srb); + free_tag(dcb, srb); + srb_free_insert(acb, srb); + dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); + cmd->result = DID_ABORT << 16; + return SUCCESS; + } + srb = find_cmd(cmd, &dcb->srb_going_list); + if (srb) { + dprintkl(KERN_DEBUG, "eh_abort: Command in progress"); + /* XXX: Should abort the command here */ + } else { + dprintkl(KERN_DEBUG, "eh_abort: Command not found"); + } + return FAILED; +} + + +/* SDTR */ +static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb) +{ + u8 *ptr = srb->msgout_buf + srb->msg_count; + if (srb->msg_count > 1) { + dprintkl(KERN_INFO, + "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", + srb->msg_count, srb->msgout_buf[0], + srb->msgout_buf[1]); + return; + } + if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { + dcb->sync_offset = 0; + dcb->min_nego_period = 200 >> 2; + } else if (dcb->sync_offset == 0) + dcb->sync_offset = SYNC_NEGO_OFFSET; + + *ptr++ = MSG_EXTENDED; /* (01h) */ + *ptr++ = 3; /* length */ + *ptr++ = EXTENDED_SDTR; /* (01h) */ + *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */ + *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */ + srb->msg_count += 5; + srb->state |= SRB_DO_SYNC_NEGO; +} + + +/* WDTR */ +static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb) +{ + u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & + (acb->config & HCC_WIDE_CARD)) ? 1 : 0; + u8 *ptr = srb->msgout_buf + srb->msg_count; + if (srb->msg_count > 1) { + dprintkl(KERN_INFO, + "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", + srb->msg_count, srb->msgout_buf[0], + srb->msgout_buf[1]); + return; + } + *ptr++ = MSG_EXTENDED; /* (01h) */ + *ptr++ = 2; /* length */ + *ptr++ = EXTENDED_WDTR; /* (03h) */ + *ptr++ = wide; + srb->msg_count += 4; + srb->state |= SRB_DO_WIDE_NEGO; +} + + +#if 0 +/* Timer to work around chip flaw: When selecting and the bus is + * busy, we sometimes miss a Selection timeout IRQ */ +void selection_timeout_missed(unsigned long ptr); +/* Sets the timer to wake us up */ +static void selto_timer(struct AdapterCtlBlk *acb) +{ + if (timer_pending(&acb->selto_timer)) + return; + acb->selto_timer.function = selection_timeout_missed; + acb->selto_timer.data = (unsigned long) acb; + if (time_before + (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2)) + acb->selto_timer.expires = + acb->scsi_host->last_reset + HZ / 2 + 1; + else + acb->selto_timer.expires = jiffies + HZ + 1; + add_timer(&acb->selto_timer); +} + + +void selection_timeout_missed(unsigned long ptr) +{ + unsigned long flags; + struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; + struct ScsiReqBlk *srb; + dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); + if (!acb->active_dcb || !acb->active_dcb->active_srb) { + dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); + return; + } + DC395x_LOCK_IO(acb->scsi_host, flags); + srb = acb->active_dcb->active_srb; + disconnect(acb); + DC395x_UNLOCK_IO(acb->scsi_host, flags); +} +#endif + + +static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, + struct ScsiReqBlk* srb) +{ + u16 s_stat2, return_code; + u8 s_stat, scsicommand, i, identify_message; + u8 *ptr; + dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n", + srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); + + srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ + + s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); + s_stat2 = 0; + s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); +#if 1 + if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { + dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n", + srb->cmd->pid, s_stat, s_stat2); + /* + * Try anyway? + * + * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection + * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed! + * (This is likely to be a bug in the hardware. Obviously, most people + * only have one initiator per SCSI bus.) + * Instead let this fail and have the timer make sure the command is + * tried again after a short time + */ + /*selto_timer (acb); */ + return 1; + } +#endif + if (acb->active_dcb) { + dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a" + "command while another command (pid#%li) is active.", + srb->cmd->pid, + acb->active_dcb->active_srb ? + acb->active_dcb->active_srb->cmd->pid : 0); + return 1; + } + if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { + dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n", + srb->cmd->pid); + return 1; + } + /* Allow starting of SCSI commands half a second before we allow the mid-level + * to queue them again after a reset */ + if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) { + dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); + return 1; + } + + /* Flush FIFO */ + clear_fifo(acb, "start_scsi"); + DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); + DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); + DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); + DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); + srb->scsi_phase = PH_BUS_FREE; /* initial phase */ + + identify_message = dcb->identify_msg; + /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ + /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ + if (srb->flag & AUTO_REQSENSE) + identify_message &= 0xBF; + + if (((srb->cmd->cmnd[0] == INQUIRY) + || (srb->cmd->cmnd[0] == REQUEST_SENSE) + || (srb->flag & AUTO_REQSENSE)) + && (((dcb->sync_mode & WIDE_NEGO_ENABLE) + && !(dcb->sync_mode & WIDE_NEGO_DONE)) + || ((dcb->sync_mode & SYNC_NEGO_ENABLE) + && !(dcb->sync_mode & SYNC_NEGO_DONE))) + && (dcb->target_lun == 0)) { + srb->msgout_buf[0] = identify_message; + srb->msg_count = 1; + scsicommand = SCMD_SEL_ATNSTOP; + srb->state = SRB_MSGOUT; +#ifndef SYNC_FIRST + if (dcb->sync_mode & WIDE_NEGO_ENABLE + && dcb->inquiry7 & SCSI_INQ_WBUS16) { + build_wdtr(acb, dcb, srb); + goto no_cmd; + } +#endif + if (dcb->sync_mode & SYNC_NEGO_ENABLE + && dcb->inquiry7 & SCSI_INQ_SYNC) { + build_sdtr(acb, dcb, srb); + goto no_cmd; + } + if (dcb->sync_mode & WIDE_NEGO_ENABLE + && dcb->inquiry7 & SCSI_INQ_WBUS16) { + build_wdtr(acb, dcb, srb); + goto no_cmd; + } + srb->msg_count = 0; + } + /* Send identify message */ + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); + + scsicommand = SCMD_SEL_ATN; + srb->state = SRB_START_; +#ifndef DC395x_NO_TAGQ + if ((dcb->sync_mode & EN_TAG_QUEUEING) + && (identify_message & 0xC0)) { + /* Send Tag message */ + u32 tag_mask = 1; + u8 tag_number = 0; + while (tag_mask & dcb->tag_mask + && tag_number <= dcb->max_command) { + tag_mask = tag_mask << 1; + tag_number++; + } + if (tag_number >= dcb->max_command) { + dprintkl(KERN_WARNING, "start_scsi: (pid#%li) " + "Out of tags target=<%02i-%i>)\n", + srb->cmd->pid, srb->cmd->device->id, + srb->cmd->device->lun); + srb->state = SRB_READY; + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, + DO_HWRESELECT); + return 1; + } + /* Send Tag id */ + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); + dcb->tag_mask |= tag_mask; + srb->tag_number = tag_number; + scsicommand = SCMD_SEL_ATN3; + srb->state = SRB_START_; + } +#endif +/*polling:*/ + /* Send CDB ..command block ......... */ + dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n", + srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun, + srb->cmd->cmnd[0], srb->tag_number); + if (srb->flag & AUTO_REQSENSE) { + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, + sizeof(srb->cmd->sense_buffer)); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); + } else { + ptr = (u8 *)srb->cmd->cmnd; + for (i = 0; i < srb->cmd->cmd_len; i++) + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); + } + no_cmd: + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, + DO_HWRESELECT | DO_DATALATCH); + if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { + /* + * If start_scsi return 1: + * we caught an interrupt (must be reset or reselection ... ) + * : Let's process it first! + */ + dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n", + srb->cmd->pid, dcb->target_id, dcb->target_lun); + srb->state = SRB_READY; + free_tag(dcb, srb); + srb->msg_count = 0; + return_code = 1; + /* This IRQ should NOT get lost, as we did not acknowledge it */ + } else { + /* + * If start_scsi returns 0: + * we know that the SCSI processor is free + */ + srb->scsi_phase = PH_BUS_FREE; /* initial phase */ + dcb->active_srb = srb; + acb->active_dcb = dcb; + return_code = 0; + /* it's important for atn stop */ + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, + DO_DATALATCH | DO_HWRESELECT); + /* SCSI command */ + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); + } + return return_code; +} + + +#define DC395x_ENABLE_MSGOUT \ + DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ + srb->state |= SRB_MSGOUT + + +/* abort command */ +static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, + struct ScsiReqBlk *srb) +{ + srb->msgout_buf[0] = ABORT; + srb->msg_count = 1; + DC395x_ENABLE_MSGOUT; + srb->state &= ~SRB_MSGIN; + srb->state |= SRB_MSGOUT; +} + + +/** + * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to + * have been triggered for this card. + * + * @acb: a pointer to the adpter control block + * @scsi_status: the status return when we checked the card + **/ +static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, + u16 scsi_status) +{ + struct DeviceCtlBlk *dcb; + struct ScsiReqBlk *srb; + u16 phase; + u8 scsi_intstatus; + unsigned long flags; + void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, + u16 *); + + DC395x_LOCK_IO(acb->scsi_host, flags); + + /* This acknowledges the IRQ */ + scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); + if ((scsi_status & 0x2007) == 0x2002) + dprintkl(KERN_DEBUG, + "COP after COP completed? %04x\n", scsi_status); + if (debug_enabled(DBG_KG)) { + if (scsi_intstatus & INT_SELTIMEOUT) + dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); + } + /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ + + if (timer_pending(&acb->selto_timer)) + del_timer(&acb->selto_timer); + + if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { + disconnect(acb); /* bus free interrupt */ + goto out_unlock; + } + if (scsi_intstatus & INT_RESELECTED) { + reselect(acb); + goto out_unlock; + } + if (scsi_intstatus & INT_SELECT) { + dprintkl(KERN_INFO, "Host does not support target mode!\n"); + goto out_unlock; + } + if (scsi_intstatus & INT_SCSIRESET) { + scsi_reset_detect(acb); + goto out_unlock; + } + if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { + dcb = acb->active_dcb; + if (!dcb) { + dprintkl(KERN_DEBUG, + "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", + scsi_status, scsi_intstatus); + goto out_unlock; + } + srb = dcb->active_srb; + if (dcb->flag & ABORT_DEV_) { + dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); + enable_msgout_abort(acb, srb); + } + + /* software sequential machine */ + phase = (u16)srb->scsi_phase; + + /* + * 62037 or 62137 + * call dc395x_scsi_phase0[]... "phase entry" + * handle every phase before start transfer + */ + /* data_out_phase0, phase:0 */ + /* data_in_phase0, phase:1 */ + /* command_phase0, phase:2 */ + /* status_phase0, phase:3 */ + /* nop0, phase:4 PH_BUS_FREE .. initial phase */ + /* nop0, phase:5 PH_BUS_FREE .. initial phase */ + /* msgout_phase0, phase:6 */ + /* msgin_phase0, phase:7 */ + dc395x_statev = dc395x_scsi_phase0[phase]; + dc395x_statev(acb, srb, &scsi_status); + + /* + * if there were any exception occured scsi_status + * will be modify to bus free phase new scsi_status + * transfer out from ... previous dc395x_statev + */ + srb->scsi_phase = scsi_status & PHASEMASK; + phase = (u16)scsi_status & PHASEMASK; + + /* + * call dc395x_scsi_phase1[]... "phase entry" handle + * every phase to do transfer + */ + /* data_out_phase1, phase:0 */ + /* data_in_phase1, phase:1 */ + /* command_phase1, phase:2 */ + /* status_phase1, phase:3 */ + /* nop1, phase:4 PH_BUS_FREE .. initial phase */ + /* nop1, phase:5 PH_BUS_FREE .. initial phase */ + /* msgout_phase1, phase:6 */ + /* msgin_phase1, phase:7 */ + dc395x_statev = dc395x_scsi_phase1[phase]; + dc395x_statev(acb, srb, &scsi_status); + } + out_unlock: + DC395x_UNLOCK_IO(acb->scsi_host, flags); +} + + +static irqreturn_t dc395x_interrupt(int irq, void *dev_id, + struct pt_regs *regs) +{ + struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)dev_id; + u16 scsi_status; + u8 dma_status; + irqreturn_t handled = IRQ_NONE; + + /* + * Check for pending interupt + */ + scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); + dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); + if (scsi_status & SCSIINTERRUPT) { + /* interupt pending - let's process it! */ + dc395x_handle_interrupt(acb, scsi_status); + handled = IRQ_HANDLED; + } + else if (dma_status & 0x20) { + /* Error from the DMA engine */ + dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); +#if 0 + dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); + if (acb->active_dcb) { + acb->active_dcb-> flag |= ABORT_DEV_; + if (acb->active_dcb->active_srb) + enable_msgout_abort(acb, acb->active_dcb->active_srb); + } + DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); +#else + dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); + acb = NULL; +#endif + handled = IRQ_HANDLED; + } + + return handled; +} + + +static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid); + if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) + *pscsi_status = PH_BUS_FREE; /*.. initial phase */ + + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + srb->state &= ~SRB_MSGOUT; +} + + +static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + u16 i; + u8 *ptr; + dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid); + + clear_fifo(acb, "msgout_phase1"); + if (!(srb->state & SRB_MSGOUT)) { + srb->state |= SRB_MSGOUT; + dprintkl(KERN_DEBUG, + "msgout_phase1: (pid#%li) Phase unexpected\n", + srb->cmd->pid); /* So what ? */ + } + if (!srb->msg_count) { + dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n", + srb->cmd->pid); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP); + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); + return; + } + ptr = (u8 *)srb->msgout_buf; + for (i = 0; i < srb->msg_count; i++) + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); + srb->msg_count = 0; + if (srb->msgout_buf[0] == MSG_ABORT) + srb->state = SRB_ABORT_SENT; + + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); +} + + +static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid); + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); +} + + +static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + struct DeviceCtlBlk *dcb; + u8 *ptr; + u16 i; + dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid); + + clear_fifo(acb, "command_phase1"); + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); + if (!(srb->flag & AUTO_REQSENSE)) { + ptr = (u8 *)srb->cmd->cmnd; + for (i = 0; i < srb->cmd->cmd_len; i++) { + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); + ptr++; + } + } else { + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); + dcb = acb->active_dcb; + /* target id */ + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, + sizeof(srb->cmd->sense_buffer)); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); + } + srb->state |= SRB_COMMAND; + /* it's important for atn stop */ + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); + /* SCSI command */ + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); +} + + +/* + * Verify that the remaining space in the hw sg lists is the same as + * the count of remaining bytes in srb->total_xfer_length + */ +static void sg_verify_length(struct ScsiReqBlk *srb) +{ + if (debug_enabled(DBG_SG)) { + unsigned len = 0; + unsigned idx = srb->sg_index; + struct SGentry *psge = srb->segment_x + idx; + for (; idx < srb->sg_count; psge++, idx++) + len += psge->length; + if (len != srb->total_xfer_length) + dprintkdbg(DBG_SG, + "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", + srb->total_xfer_length, len); + } +} + + +/* + * Compute the next Scatter Gather list index and adjust its length + * and address if necessary; also compute virt_addr + */ +static void sg_update_list(struct ScsiReqBlk *srb, u32 left) +{ + u8 idx; + struct scatterlist *sg; + struct scsi_cmnd *cmd = srb->cmd; + int segment = cmd->use_sg; + u32 xferred = srb->total_xfer_length - left; /* bytes transfered */ + struct SGentry *psge = srb->segment_x + srb->sg_index; + void **virt = srb->virt_map; + + dprintkdbg(DBG_0, + "sg_update_list: Transfered %i of %i bytes, %i remain\n", + xferred, srb->total_xfer_length, left); + if (xferred == 0) { + /* nothing to update since we did not transfer any data */ + return; + } + + sg_verify_length(srb); + srb->total_xfer_length = left; /* update remaining count */ + for (idx = srb->sg_index; idx < srb->sg_count; idx++) { + if (xferred >= psge->length) { + /* Complete SG entries done */ + xferred -= psge->length; + } else { + /* Partial SG entry done */ + psge->length -= xferred; + psge->address += xferred; + srb->sg_index = idx; + pci_dma_sync_single_for_device(srb->dcb-> + acb->dev, + srb->sg_bus_addr, + SEGMENTX_LEN, + PCI_DMA_TODEVICE); + break; + } + psge++; + } + sg_verify_length(srb); + + /* we need the corresponding virtual address */ + if (!segment) { + srb->virt_addr += xferred; + return; + } + + /* We have to walk the scatterlist to find it */ + sg = (struct scatterlist *)cmd->request_buffer; + idx = 0; + while (segment--) { + unsigned long mask = + ~((unsigned long)sg->length - 1) & PAGE_MASK; + if ((sg_dma_address(sg) & mask) == (psge->address & mask)) { + srb->virt_addr = virt[idx] + (psge->address & ~PAGE_MASK); + return; + } + ++sg; + ++idx; + } + + dprintkl(KERN_ERR, "sg_update_list: sg_to_virt failed\n"); + srb->virt_addr = NULL; +} + + +/* + * We have transfered a single byte (PIO mode?) and need to update + * the count of bytes remaining (total_xfer_length) and update the sg + * entry to either point to next byte in the current sg entry, or of + * already at the end to point to the start of the next sg entry + */ +static void sg_subtract_one(struct ScsiReqBlk *srb) +{ + srb->total_xfer_length--; + srb->segment_x[srb->sg_index].length--; + if (srb->total_xfer_length && + !srb->segment_x[srb->sg_index].length) { + if (debug_enabled(DBG_PIO)) + printk(" (next segment)"); + srb->sg_index++; + sg_update_list(srb, srb->total_xfer_length); + } +} + + +/* + * cleanup_after_transfer + * + * Makes sure, DMA and SCSI engine are empty, after the transfer has finished + * KG: Currently called from StatusPhase1 () + * Should probably also be called from other places + * Best might be to call it in DataXXPhase0, if new phase will differ + */ +static void cleanup_after_transfer(struct AdapterCtlBlk *acb, + struct ScsiReqBlk *srb) +{ + /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ + if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ + if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) + clear_fifo(acb, "cleanup/in"); + if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) + DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); + } else { /* write */ + if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) + DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); + if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) + clear_fifo(acb, "cleanup/out"); + } + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); +} + + +/* + * Those no of bytes will be transfered w/ PIO through the SCSI FIFO + * Seems to be needed for unknown reasons; could be a hardware bug :-( + */ +#define DC395x_LASTPIO 4 + + +static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + struct DeviceCtlBlk *dcb = srb->dcb; + u16 scsi_status = *pscsi_status; + u32 d_left_counter = 0; + dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n", + srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); + + /* + * KG: We need to drain the buffers before we draw any conclusions! + * This means telling the DMA to push the rest into SCSI, telling + * SCSI to push the rest to the bus. + * However, the device might have been the one to stop us (phase + * change), and the data in transit just needs to be accounted so + * it can be retransmitted.) + */ + /* + * KG: Stop DMA engine pushing more data into the SCSI FIFO + * If we need more data, the DMA SG list will be freshly set up, anyway + */ + dprintkdbg(DBG_PIO, "data_out_phase0: " + "DMA{fifcnt=0x%02x fifostat=0x%02x} " + "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", + DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), + DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), + DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), + DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, + srb->total_xfer_length); + DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); + + if (!(srb->state & SRB_XFERPAD)) { + if (scsi_status & PARITYERROR) + srb->status |= PARITY_ERROR; + + /* + * KG: Right, we can't just rely on the SCSI_COUNTER, because this + * is the no of bytes it got from the DMA engine not the no it + * transferred successfully to the device. (And the difference could + * be as much as the FIFO size, I guess ...) + */ + if (!(scsi_status & SCSIXFERDONE)) { + /* + * when data transfer from DMA FIFO to SCSI FIFO + * if there was some data left in SCSI FIFO + */ + d_left_counter = + (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & + 0x1F); + if (dcb->sync_period & WIDE_SYNC) + d_left_counter <<= 1; + + dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" + "SCSI{fifocnt=0x%02x cnt=0x%08x} " + "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", + DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), + (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", + DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), + DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), + DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), + DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), + DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); + } + /* + * calculate all the residue data that not yet transfered + * SCSI transfer counter + left in SCSI FIFO data + * + * .....TRM_S1040_SCSI_COUNTER (24bits) + * The counter always decrement by one for every SCSI byte transfer. + * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) + * The counter is SCSI FIFO offset counter (in units of bytes or! words) + */ + if (srb->total_xfer_length > DC395x_LASTPIO) + d_left_counter += + DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); + + /* Is this a good idea? */ + /*clear_fifo(acb, "DOP1"); */ + /* KG: What is this supposed to be useful for? WIDE padding stuff? */ + if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC + && srb->cmd->request_bufflen % 2) { + d_left_counter = 0; + dprintkl(KERN_INFO, + "data_out_phase0: Discard 1 byte (0x%02x)\n", + scsi_status); + } + /* + * KG: Oops again. Same thinko as above: The SCSI might have been + * faster than the DMA engine, so that it ran out of data. + * In that case, we have to do just nothing! + * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? + */ + /* + * KG: This is nonsense: We have been WRITING data to the bus + * If the SCSI engine has no bytes left, how should the DMA engine? + */ + if (d_left_counter == 0) { + srb->total_xfer_length = 0; + } else { + /* + * if transfer not yet complete + * there were some data residue in SCSI FIFO or + * SCSI transfer counter not empty + */ + long oldxferred = + srb->total_xfer_length - d_left_counter; + const int diff = + (dcb->sync_period & WIDE_SYNC) ? 2 : 1; + sg_update_list(srb, d_left_counter); + /* KG: Most ugly hack! Apparently, this works around a chip bug */ + if ((srb->segment_x[srb->sg_index].length == + diff && srb->cmd->use_sg) + || ((oldxferred & ~PAGE_MASK) == + (PAGE_SIZE - diff)) + ) { + dprintkl(KERN_INFO, "data_out_phase0: " + "Work around chip bug (%i)?\n", diff); + d_left_counter = + srb->total_xfer_length - diff; + sg_update_list(srb, d_left_counter); + /*srb->total_xfer_length -= diff; */ + /*srb->virt_addr += diff; */ + /*if (srb->cmd->use_sg) */ + /* srb->sg_index++; */ + } + } + } + if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { + cleanup_after_transfer(acb, srb); + } +} + + +static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n", + srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); + clear_fifo(acb, "data_out_phase1"); + /* do prepare before transfer when data out phase */ + data_io_transfer(acb, srb, XFERDATAOUT); +} + + +static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + u16 scsi_status = *pscsi_status; + u32 d_left_counter = 0; + dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n", + srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); + + /* + * KG: DataIn is much more tricky than DataOut. When the device is finished + * and switches to another phase, the SCSI engine should be finished too. + * But: There might still be bytes left in its FIFO to be fetched by the DMA + * engine and transferred to memory. + * We should wait for the FIFOs to be emptied by that (is there any way to + * enforce this?) and then stop the DMA engine, because it might think, that + * there are more bytes to follow. Yes, the device might disconnect prior to + * having all bytes transferred! + * Also we should make sure that all data from the DMA engine buffer's really + * made its way to the system memory! Some documentation on this would not + * seem to be a bad idea, actually. + */ + if (!(srb->state & SRB_XFERPAD)) { + if (scsi_status & PARITYERROR) { + dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) " + "Parity Error\n", srb->cmd->pid); + srb->status |= PARITY_ERROR; + } + /* + * KG: We should wait for the DMA FIFO to be empty ... + * but: it would be better to wait first for the SCSI FIFO and then the + * the DMA FIFO to become empty? How do we know, that the device not already + * sent data to the FIFO in a MsgIn phase, eg.? + */ + if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { +#if 0 + int ctr = 6000000; + dprintkl(KERN_DEBUG, + "DIP0: Wait for DMA FIFO to flush ...\n"); + /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ + /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ + /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ + while (! + (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & + 0x80) && --ctr); + if (ctr < 6000000 - 1) + dprintkl(KERN_DEBUG + "DIP0: Had to wait for DMA ...\n"); + if (!ctr) + dprintkl(KERN_ERR, + "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); + /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ +#endif + dprintkdbg(DBG_KG, "data_in_phase0: " + "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", + DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), + DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); + } + /* Now: Check remainig data: The SCSI counters should tell us ... */ + d_left_counter = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER) + + ((DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f) + << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : + 0)); + dprintkdbg(DBG_KG, "data_in_phase0: " + "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " + "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " + "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", + DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), + (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", + DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), + DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), + DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), + DC395x_read32(acb, TRM_S1040_DMA_CXCNT), + srb->total_xfer_length, d_left_counter); +#if DC395x_LASTPIO + /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */ + if (d_left_counter + && srb->total_xfer_length <= DC395x_LASTPIO) { + /*u32 addr = (srb->segment_x[srb->sg_index].address); */ + /*sg_update_list (srb, d_left_counter); */ + dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) to " + "%p for remaining %i bytes:", + DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f, + (srb->dcb->sync_period & WIDE_SYNC) ? + "words" : "bytes", + srb->virt_addr, + srb->total_xfer_length); + if (srb->dcb->sync_period & WIDE_SYNC) + DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, + CFG2_WIDEFIFO); + while (DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) != 0x40) { + u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); + *(srb->virt_addr)++ = byte; + if (debug_enabled(DBG_PIO)) + printk(" %02x", byte); + d_left_counter--; + sg_subtract_one(srb); + } + if (srb->dcb->sync_period & WIDE_SYNC) { +#if 1 + /* Read the last byte ... */ + if (srb->total_xfer_length > 0) { + u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); + *(srb->virt_addr)++ = byte; + srb->total_xfer_length--; + if (debug_enabled(DBG_PIO)) + printk(" %02x", byte); + } +#endif + DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); + } + /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ + /*srb->total_xfer_length = 0; */ + if (debug_enabled(DBG_PIO)) + printk("\n"); + } +#endif /* DC395x_LASTPIO */ + +#if 0 + /* + * KG: This was in DATAOUT. Does it also belong here? + * Nobody seems to know what counter and fifo_cnt count exactly ... + */ + if (!(scsi_status & SCSIXFERDONE)) { + /* + * when data transfer from DMA FIFO to SCSI FIFO + * if there was some data left in SCSI FIFO + */ + d_left_counter = + (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & + 0x1F); + if (srb->dcb->sync_period & WIDE_SYNC) + d_left_counter <<= 1; + /* + * if WIDE scsi SCSI FIFOCNT unit is word !!! + * so need to *= 2 + * KG: Seems to be correct ... + */ + } +#endif + /* KG: This should not be needed any more! */ + if (d_left_counter == 0 + || (scsi_status & SCSIXFERCNT_2_ZERO)) { +#if 0 + int ctr = 6000000; + u8 TempDMAstatus; + do { + TempDMAstatus = + DC395x_read8(acb, TRM_S1040_DMA_STATUS); + } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); + if (!ctr) + dprintkl(KERN_ERR, + "Deadlock in DataInPhase0 waiting for DMA!!\n"); + srb->total_xfer_length = 0; +#endif + srb->total_xfer_length = d_left_counter; + } else { /* phase changed */ + /* + * parsing the case: + * when a transfer not yet complete + * but be disconnected by target + * if transfer not yet complete + * there were some data residue in SCSI FIFO or + * SCSI transfer counter not empty + */ + sg_update_list(srb, d_left_counter); + } + } + /* KG: The target may decide to disconnect: Empty FIFO before! */ + if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { + cleanup_after_transfer(acb, srb); + } +} + + +static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n", + srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); + data_io_transfer(acb, srb, XFERDATAIN); +} + + +static void data_io_transfer(struct AdapterCtlBlk *acb, + struct ScsiReqBlk *srb, u16 io_dir) +{ + struct DeviceCtlBlk *dcb = srb->dcb; + u8 bval; + dprintkdbg(DBG_0, + "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n", + srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun, + ((io_dir & DMACMD_DIR) ? 'r' : 'w'), + srb->total_xfer_length, srb->sg_index, srb->sg_count); + if (srb == acb->tmp_srb) + dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); + if (srb->sg_index >= srb->sg_count) { + /* can't happen? out of bounds error */ + return; + } + + if (srb->total_xfer_length > DC395x_LASTPIO) { + u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); + /* + * KG: What should we do: Use SCSI Cmd 0x90/0x92? + * Maybe, even ABORTXFER would be appropriate + */ + if (dma_status & XFERPENDING) { + dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " + "Expect trouble!\n"); + dump_register_info(acb, dcb, srb); + DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); + } + /* clear_fifo(acb, "IO"); */ + /* + * load what physical address of Scatter/Gather list table + * want to be transfer + */ + srb->state |= SRB_DATA_XFER; + DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); + if (srb->cmd->use_sg) { /* with S/G */ + io_dir |= DMACMD_SG; + DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, + srb->sg_bus_addr + + sizeof(struct SGentry) * + srb->sg_index); + /* load how many bytes in the sg list table */ + DC395x_write32(acb, TRM_S1040_DMA_XCNT, + ((u32)(srb->sg_count - + srb->sg_index) << 3)); + } else { /* without S/G */ + io_dir &= ~DMACMD_SG; + DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, + srb->segment_x[0].address); + DC395x_write32(acb, TRM_S1040_DMA_XCNT, + srb->segment_x[0].length); + } + /* load total transfer length (24bits) max value 16Mbyte */ + DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, + srb->total_xfer_length); + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + if (io_dir & DMACMD_DIR) { /* read */ + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, + SCMD_DMA_IN); + DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); + } else { + DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, + SCMD_DMA_OUT); + } + + } +#if DC395x_LASTPIO + else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ + /* + * load what physical address of Scatter/Gather list table + * want to be transfer + */ + srb->state |= SRB_DATA_XFER; + /* load total transfer length (24bits) max value 16Mbyte */ + DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, + srb->total_xfer_length); + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + if (io_dir & DMACMD_DIR) { /* read */ + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, + SCMD_FIFO_IN); + } else { /* write */ + int ln = srb->total_xfer_length; + if (srb->dcb->sync_period & WIDE_SYNC) + DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, + CFG2_WIDEFIFO); + dprintkdbg(DBG_PIO, + "data_io_transfer: PIO %i bytes from %p:", + srb->total_xfer_length, srb->virt_addr); + + while (srb->total_xfer_length) { + if (debug_enabled(DBG_PIO)) + printk(" %02x", (unsigned char) *(srb->virt_addr)); + + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, + *(srb->virt_addr)++); + + sg_subtract_one(srb); + } + if (srb->dcb->sync_period & WIDE_SYNC) { + if (ln % 2) { + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); + if (debug_enabled(DBG_PIO)) + printk(" |00"); + } + DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); + } + /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ + if (debug_enabled(DBG_PIO)) + printk("\n"); + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, + SCMD_FIFO_OUT); + } + } +#endif /* DC395x_LASTPIO */ + else { /* xfer pad */ + u8 data = 0, data2 = 0; + if (srb->sg_count) { + srb->adapter_status = H_OVER_UNDER_RUN; + srb->status |= OVER_RUN; + } + /* + * KG: despite the fact that we are using 16 bits I/O ops + * the SCSI FIFO is only 8 bits according to the docs + * (we can set bit 1 in 0x8f to serialize FIFO access ...) + */ + if (dcb->sync_period & WIDE_SYNC) { + DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); + DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, + CFG2_WIDEFIFO); + if (io_dir & DMACMD_DIR) { + data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); + data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); + } else { + /* Danger, Robinson: If you find KGs + * scattered over the wide disk, the driver + * or chip is to blame :-( */ + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); + } + DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); + } else { + DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); + /* Danger, Robinson: If you find a collection of Ks on your disk + * something broke :-( */ + if (io_dir & DMACMD_DIR) + data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); + else + DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); + } + srb->state |= SRB_XFERPAD; + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + /* SCSI command */ + bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); + } +} + + +static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n", + srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); + srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); + srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ + srb->state = SRB_COMPLETED; + *pscsi_status = PH_BUS_FREE; /*.. initial phase */ + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); +} + + +static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n", + srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); + srb->state = SRB_STATUS; + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); +} + + +/* Check if the message is complete */ +static inline u8 msgin_completed(u8 * msgbuf, u32 len) +{ + if (*msgbuf == EXTENDED_MESSAGE) { + if (len < 2) + return 0; + if (len < msgbuf[1] + 2) + return 0; + } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ + if (len < 2) + return 0; + return 1; +} + +/* reject_msg */ +static inline void msgin_reject(struct AdapterCtlBlk *acb, + struct ScsiReqBlk *srb) +{ + srb->msgout_buf[0] = MESSAGE_REJECT; + srb->msg_count = 1; + DC395x_ENABLE_MSGOUT; + srb->state &= ~SRB_MSGIN; + srb->state |= SRB_MSGOUT; + dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", + srb->msgin_buf[0], + srb->dcb->target_id, srb->dcb->target_lun); +} + + +static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, + struct DeviceCtlBlk *dcb, u8 tag) +{ + struct ScsiReqBlk *srb = NULL; + struct ScsiReqBlk *i; + dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n", + srb->cmd->pid, tag, srb); + + if (!(dcb->tag_mask & (1 << tag))) + dprintkl(KERN_DEBUG, + "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", + dcb->tag_mask, tag); + + if (list_empty(&dcb->srb_going_list)) + goto mingx0; + list_for_each_entry(i, &dcb->srb_going_list, list) { + if (i->tag_number == tag) { + srb = i; + break; + } + } + if (!srb) + goto mingx0; + + dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n", + srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun); + if (dcb->flag & ABORT_DEV_) { + /*srb->state = SRB_ABORT_SENT; */ + enable_msgout_abort(acb, srb); + } + + if (!(srb->state & SRB_DISCONNECT)) + goto mingx0; + + memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); + srb->state |= dcb->active_srb->state; + srb->state |= SRB_DATA_XFER; + dcb->active_srb = srb; + /* How can we make the DORS happy? */ + return srb; + + mingx0: + srb = acb->tmp_srb; + srb->state = SRB_UNEXPECT_RESEL; + dcb->active_srb = srb; + srb->msgout_buf[0] = MSG_ABORT_TAG; + srb->msg_count = 1; + DC395x_ENABLE_MSGOUT; + dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); + return srb; +} + + +static inline void reprogram_regs(struct AdapterCtlBlk *acb, + struct DeviceCtlBlk *dcb) +{ + DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); + DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); + DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); + set_xfer_rate(acb, dcb); +} + + +/* set async transfer mode */ +static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) +{ + struct DeviceCtlBlk *dcb = srb->dcb; + dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", + dcb->target_id, dcb->target_lun); + + dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); + dcb->sync_mode |= SYNC_NEGO_DONE; + /*dcb->sync_period &= 0; */ + dcb->sync_offset = 0; + dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ + srb->state &= ~SRB_DO_SYNC_NEGO; + reprogram_regs(acb, dcb); + if ((dcb->sync_mode & WIDE_NEGO_ENABLE) + && !(dcb->sync_mode & WIDE_NEGO_DONE)) { + build_wdtr(acb, dcb, srb); + DC395x_ENABLE_MSGOUT; + dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); + } +} + + +/* set sync transfer mode */ +static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) +{ + struct DeviceCtlBlk *dcb = srb->dcb; + u8 bval; + int fact; + dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " + "(%02i.%01i MHz) Offset %i\n", + dcb->target_id, srb->msgin_buf[3] << 2, + (250 / srb->msgin_buf[3]), + ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], + srb->msgin_buf[4]); + + if (srb->msgin_buf[4] > 15) + srb->msgin_buf[4] = 15; + if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) + dcb->sync_offset = 0; + else if (dcb->sync_offset == 0) + dcb->sync_offset = srb->msgin_buf[4]; + if (srb->msgin_buf[4] > dcb->sync_offset) + srb->msgin_buf[4] = dcb->sync_offset; + else + dcb->sync_offset = srb->msgin_buf[4]; + bval = 0; + while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] + || dcb->min_nego_period > + clock_period[bval])) + bval++; + if (srb->msgin_buf[3] < clock_period[bval]) + dprintkl(KERN_INFO, + "msgin_set_sync: Increase sync nego period to %ins\n", + clock_period[bval] << 2); + srb->msgin_buf[3] = clock_period[bval]; + dcb->sync_period &= 0xf0; + dcb->sync_period |= ALT_SYNC | bval; + dcb->min_nego_period = srb->msgin_buf[3]; + + if (dcb->sync_period & WIDE_SYNC) + fact = 500; + else + fact = 250; + + dprintkl(KERN_INFO, + "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", + dcb->target_id, (fact == 500) ? "Wide16" : "", + dcb->min_nego_period << 2, dcb->sync_offset, + (fact / dcb->min_nego_period), + ((fact % dcb->min_nego_period) * 10 + + dcb->min_nego_period / 2) / dcb->min_nego_period); + + if (!(srb->state & SRB_DO_SYNC_NEGO)) { + /* Reply with corrected SDTR Message */ + dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", + srb->msgin_buf[3] << 2, srb->msgin_buf[4]); + + memcpy(srb->msgout_buf, srb->msgin_buf, 5); + srb->msg_count = 5; + DC395x_ENABLE_MSGOUT; + dcb->sync_mode |= SYNC_NEGO_DONE; + } else { + if ((dcb->sync_mode & WIDE_NEGO_ENABLE) + && !(dcb->sync_mode & WIDE_NEGO_DONE)) { + build_wdtr(acb, dcb, srb); + DC395x_ENABLE_MSGOUT; + dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); + } + } + srb->state &= ~SRB_DO_SYNC_NEGO; + dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; + + reprogram_regs(acb, dcb); +} + + +static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, + struct ScsiReqBlk *srb) +{ + struct DeviceCtlBlk *dcb = srb->dcb; + dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); + + dcb->sync_period &= ~WIDE_SYNC; + dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); + dcb->sync_mode |= WIDE_NEGO_DONE; + srb->state &= ~SRB_DO_WIDE_NEGO; + reprogram_regs(acb, dcb); + if ((dcb->sync_mode & SYNC_NEGO_ENABLE) + && !(dcb->sync_mode & SYNC_NEGO_DONE)) { + build_sdtr(acb, dcb, srb); + DC395x_ENABLE_MSGOUT; + dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); + } +} + +static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) +{ + struct DeviceCtlBlk *dcb = srb->dcb; + u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO + && acb->config & HCC_WIDE_CARD) ? 1 : 0; + dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); + + if (srb->msgin_buf[3] > wide) + srb->msgin_buf[3] = wide; + /* Completed */ + if (!(srb->state & SRB_DO_WIDE_NEGO)) { + dprintkl(KERN_DEBUG, + "msgin_set_wide: Wide nego initiated <%02i>\n", + dcb->target_id); + memcpy(srb->msgout_buf, srb->msgin_buf, 4); + srb->msg_count = 4; + srb->state |= SRB_DO_WIDE_NEGO; + DC395x_ENABLE_MSGOUT; + } + + dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); + if (srb->msgin_buf[3] > 0) + dcb->sync_period |= WIDE_SYNC; + else + dcb->sync_period &= ~WIDE_SYNC; + srb->state &= ~SRB_DO_WIDE_NEGO; + /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ + dprintkdbg(DBG_1, + "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", + (8 << srb->msgin_buf[3]), dcb->target_id); + reprogram_regs(acb, dcb); + if ((dcb->sync_mode & SYNC_NEGO_ENABLE) + && !(dcb->sync_mode & SYNC_NEGO_DONE)) { + build_sdtr(acb, dcb, srb); + DC395x_ENABLE_MSGOUT; + dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); + } +} + + +/* + * extended message codes: + * + * code description + * + * 02h Reserved + * 00h MODIFY DATA POINTER + * 01h SYNCHRONOUS DATA TRANSFER REQUEST + * 03h WIDE DATA TRANSFER REQUEST + * 04h - 7Fh Reserved + * 80h - FFh Vendor specific + */ +static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + struct DeviceCtlBlk *dcb = acb->active_dcb; + dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid); + + srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); + if (msgin_completed(srb->msgin_buf, acb->msg_len)) { + /* Now eval the msg */ + switch (srb->msgin_buf[0]) { + case DISCONNECT: + srb->state = SRB_DISCONNECT; + break; + + case SIMPLE_QUEUE_TAG: + case HEAD_OF_QUEUE_TAG: + case ORDERED_QUEUE_TAG: + srb = + msgin_qtag(acb, dcb, + srb->msgin_buf[1]); + break; + + case MESSAGE_REJECT: + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, + DO_CLRATN | DO_DATALATCH); + /* A sync nego message was rejected ! */ + if (srb->state & SRB_DO_SYNC_NEGO) { + msgin_set_async(acb, srb); + break; + } + /* A wide nego message was rejected ! */ + if (srb->state & SRB_DO_WIDE_NEGO) { + msgin_set_nowide(acb, srb); + break; + } + enable_msgout_abort(acb, srb); + /*srb->state |= SRB_ABORT_SENT */ + break; + + case EXTENDED_MESSAGE: + /* SDTR */ + if (srb->msgin_buf[1] == 3 + && srb->msgin_buf[2] == EXTENDED_SDTR) { + msgin_set_sync(acb, srb); + break; + } + /* WDTR */ + if (srb->msgin_buf[1] == 2 + && srb->msgin_buf[2] == EXTENDED_WDTR + && srb->msgin_buf[3] <= 2) { /* sanity check ... */ + msgin_set_wide(acb, srb); + break; + } + msgin_reject(acb, srb); + break; + + case MSG_IGNOREWIDE: + /* Discard wide residual */ + dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); + break; + + case COMMAND_COMPLETE: + /* nothing has to be done */ + break; + + case SAVE_POINTERS: + /* + * SAVE POINTER may be ignored as we have the struct + * ScsiReqBlk* associated with the scsi command. + */ + dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " + "SAVE POINTER rem=%i Ignore\n", + srb->cmd->pid, srb->total_xfer_length); + break; + + case RESTORE_POINTERS: + dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); + break; + + case ABORT: + dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " + "<%02i-%i> ABORT msg\n", + srb->cmd->pid, dcb->target_id, + dcb->target_lun); + dcb->flag |= ABORT_DEV_; + enable_msgout_abort(acb, srb); + break; + + default: + /* reject unknown messages */ + if (srb->msgin_buf[0] & IDENTIFY_BASE) { + dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); + srb->msg_count = 1; + srb->msgout_buf[0] = dcb->identify_msg; + DC395x_ENABLE_MSGOUT; + srb->state |= SRB_MSGOUT; + /*break; */ + } + msgin_reject(acb, srb); + } + + /* Clear counter and MsgIn state */ + srb->state &= ~SRB_MSGIN; + acb->msg_len = 0; + } + *pscsi_status = PH_BUS_FREE; + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); +} + + +static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ + dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid); + clear_fifo(acb, "msgin_phase1"); + DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); + if (!(srb->state & SRB_MSGIN)) { + srb->state &= ~SRB_DISCONNECT; + srb->state |= SRB_MSGIN; + } + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + /* SCSI command */ + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); +} + + +static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ +} + + +static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, + u16 *pscsi_status) +{ +} + + +static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) +{ + struct DeviceCtlBlk *i; + + /* set all lun device's period, offset */ + if (dcb->identify_msg & 0x07) + return; + + if (acb->scan_devices) { + current_sync_offset = dcb->sync_offset; + return; + } + + list_for_each_entry(i, &acb->dcb_list, list) + if (i->target_id == dcb->target_id) { + i->sync_period = dcb->sync_period; + i->sync_offset = dcb->sync_offset; + i->sync_mode = dcb->sync_mode; + i->min_nego_period = dcb->min_nego_period; + } +} + + +static void disconnect(struct AdapterCtlBlk *acb) +{ + struct DeviceCtlBlk *dcb = acb->active_dcb; + struct ScsiReqBlk *srb; + + if (!dcb) { + dprintkl(KERN_ERR, "disconnect: No such device\n"); + udelay(500); + /* Suspend queue for a while */ + acb->scsi_host->last_reset = + jiffies + HZ / 2 + + HZ * acb->eeprom.delay_time; + clear_fifo(acb, "disconnectEx"); + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); + return; + } + srb = dcb->active_srb; + acb->active_dcb = NULL; + dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid); + + srb->scsi_phase = PH_BUS_FREE; /* initial phase */ + clear_fifo(acb, "disconnect"); + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); + if (srb->state & SRB_UNEXPECT_RESEL) { + dprintkl(KERN_ERR, + "disconnect: Unexpected reselection <%02i-%i>\n", + dcb->target_id, dcb->target_lun); + srb->state = 0; + waiting_process_next(acb); + } else if (srb->state & SRB_ABORT_SENT) { + dcb->flag &= ~ABORT_DEV_; + acb->scsi_host->last_reset = jiffies + HZ / 2 + 1; + dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n"); + doing_srb_done(acb, DID_ABORT, srb->cmd, 1); + waiting_process_next(acb); + } else { + if ((srb->state & (SRB_START_ + SRB_MSGOUT)) + || !(srb-> + state & (SRB_DISCONNECT + SRB_COMPLETED))) { + /* + * Selection time out + * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED) + */ + /* Unexp. Disc / Sel Timeout */ + if (srb->state != SRB_START_ + && srb->state != SRB_MSGOUT) { + srb->state = SRB_READY; + dprintkl(KERN_DEBUG, + "disconnect: (pid#%li) Unexpected\n", + srb->cmd->pid); + srb->target_status = SCSI_STAT_SEL_TIMEOUT; + goto disc1; + } else { + /* Normal selection timeout */ + dprintkdbg(DBG_KG, "disconnect: (pid#%li) " + "<%02i-%i> SelTO\n", srb->cmd->pid, + dcb->target_id, dcb->target_lun); + if (srb->retry_count++ > DC395x_MAX_RETRIES + || acb->scan_devices) { + srb->target_status = + SCSI_STAT_SEL_TIMEOUT; + goto disc1; + } + free_tag(dcb, srb); + srb_going_to_waiting_move(dcb, srb); + dprintkdbg(DBG_KG, + "disconnect: (pid#%li) Retry\n", + srb->cmd->pid); + waiting_set_timer(acb, HZ / 20); + } + } else if (srb->state & SRB_DISCONNECT) { + u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); + /* + * SRB_DISCONNECT (This is what we expect!) + */ + if (bval & 0x40) { + dprintkdbg(DBG_0, "disconnect: SCSI bus stat " + " 0x%02x: ACK set! Other controllers?\n", + bval); + /* It could come from another initiator, therefore don't do much ! */ + } else + waiting_process_next(acb); + } else if (srb->state & SRB_COMPLETED) { + disc1: + /* + ** SRB_COMPLETED + */ + free_tag(dcb, srb); + dcb->active_srb = NULL; + srb->state = SRB_FREE; + srb_done(acb, dcb, srb); + } + } +} + + +static void reselect(struct AdapterCtlBlk *acb) +{ + struct DeviceCtlBlk *dcb = acb->active_dcb; + struct ScsiReqBlk *srb = NULL; + u16 rsel_tar_lun_id; + u8 id, lun; + u8 arblostflag = 0; + dprintkdbg(DBG_0, "reselect: acb=%p\n", acb); + + clear_fifo(acb, "reselect"); + /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */ + /* Read Reselected Target ID and LUN */ + rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID); + if (dcb) { /* Arbitration lost but Reselection win */ + srb = dcb->active_srb; + if (!srb) { + dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, " + "but active_srb == NULL\n"); + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + return; + } + /* Why the if ? */ + if (!acb->scan_devices) { + dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> " + "Arb lost but Resel win rsel=%i stat=0x%04x\n", + srb->cmd->pid, dcb->target_id, + dcb->target_lun, rsel_tar_lun_id, + DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); + arblostflag = 1; + /*srb->state |= SRB_DISCONNECT; */ + + srb->state = SRB_READY; + free_tag(dcb, srb); + srb_going_to_waiting_move(dcb, srb); + waiting_set_timer(acb, HZ / 20); + + /* return; */ + } + } + /* Read Reselected Target Id and LUN */ + if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8))) + dprintkl(KERN_DEBUG, "reselect: Expects identify msg. " + "Got %i!\n", rsel_tar_lun_id); + id = rsel_tar_lun_id & 0xff; + lun = (rsel_tar_lun_id >> 8) & 7; + dcb = find_dcb(acb, id, lun); + if (!dcb) { + dprintkl(KERN_ERR, "reselect: From non existent device " + "<%02i-%i>\n", id, lun); + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + return; + } + acb->active_dcb = dcb; + + if (!(dcb->dev_mode & NTC_DO_DISCONNECT)) + dprintkl(KERN_DEBUG, "reselect: in spite of forbidden " + "disconnection? <%02i-%i>\n", + dcb->target_id, dcb->target_lun); + + if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) { + srb = acb->tmp_srb; + dcb->active_srb = srb; + } else { + /* There can be only one! */ + srb = dcb->active_srb; + if (!srb || !(srb->state & SRB_DISCONNECT)) { + /* + * abort command + */ + dprintkl(KERN_DEBUG, + "reselect: w/o disconnected cmds <%02i-%i>\n", + dcb->target_id, dcb->target_lun); + srb = acb->tmp_srb; + srb->state = SRB_UNEXPECT_RESEL; + dcb->active_srb = srb; + enable_msgout_abort(acb, srb); + } else { + if (dcb->flag & ABORT_DEV_) { + /*srb->state = SRB_ABORT_SENT; */ + enable_msgout_abort(acb, srb); + } else + srb->state = SRB_DATA_XFER; + + } + } + srb->scsi_phase = PH_BUS_FREE; /* initial phase */ + + /* Program HA ID, target ID, period and offset */ + dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id); + DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */ + DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */ + DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */ + DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */ + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ + /* SCSI command */ + DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); +} + + +static inline u8 tagq_blacklist(char *name) +{ +#ifndef DC395x_NO_TAGQ +#if 0 + u8 i; + for (i = 0; i < BADDEVCNT; i++) + if (memcmp(name, DC395x_baddevname1[i], 28) == 0) + return 1; +#endif + return 0; +#else + return 1; +#endif +} + + +static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr) +{ + /* Check for SCSI format (ANSI and Response data format) */ + if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) { + if ((ptr->Flags & SCSI_INQ_CMDQUEUE) + && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) && + /*(dcb->dev_mode & NTC_DO_DISCONNECT) */ + /* ((dcb->dev_type == TYPE_DISK) + || (dcb->dev_type == TYPE_MOD)) && */ + !tagq_blacklist(((char *)ptr) + 8)) { + if (dcb->max_command == 1) + dcb->max_command = + dcb->acb->tag_max_num; + dcb->sync_mode |= EN_TAG_QUEUEING; + /*dcb->tag_mask = 0; */ + } else + dcb->max_command = 1; + } +} + + +static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, + struct ScsiInqData *ptr) +{ + u8 bval1 = ptr->DevType & SCSI_DEVTYPE; + dcb->dev_type = bval1; + /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */ + disc_tagq_set(dcb, ptr); +} + + +/* unmap mapped pci regions from SRB */ +static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) +{ + struct scsi_cmnd *cmd = srb->cmd; + enum dma_data_direction dir = cmd->sc_data_direction; + if (cmd->use_sg && dir != PCI_DMA_NONE) { + int i; + /* unmap DC395x SG list */ + dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", + srb->sg_bus_addr, SEGMENTX_LEN); + pci_unmap_single(acb->dev, srb->sg_bus_addr, + SEGMENTX_LEN, + PCI_DMA_TODEVICE); + dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", + cmd->use_sg, cmd->request_buffer); + /* unmap the sg segments */ + for (i = 0; i < srb->sg_count; i++) + kunmap(virt_to_page(srb->virt_map[i])); + pci_unmap_sg(acb->dev, + (struct scatterlist *)cmd->request_buffer, + cmd->use_sg, dir); + } else if (cmd->request_buffer && dir != PCI_DMA_NONE) { + dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n", + srb->segment_x[0].address, cmd->request_bufflen); + pci_unmap_single(acb->dev, srb->segment_x[0].address, + cmd->request_bufflen, dir); + } +} + + +/* unmap mapped pci sense buffer from SRB */ +static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, + struct ScsiReqBlk *srb) +{ + if (!(srb->flag & AUTO_REQSENSE)) + return; + /* Unmap sense buffer */ + dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n", + srb->segment_x[0].address); + pci_unmap_single(acb->dev, srb->segment_x[0].address, + srb->segment_x[0].length, PCI_DMA_FROMDEVICE); + /* Restore SG stuff */ + srb->total_xfer_length = srb->xferred; + srb->segment_x[0].address = + srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address; + srb->segment_x[0].length = + srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length; +} + + +/* + * Complete execution of a SCSI command + * Signal completion to the generic SCSI driver + */ +static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb) +{ + u8 tempcnt, status; + struct scsi_cmnd *cmd = srb->cmd; + struct ScsiInqData *ptr; + enum dma_data_direction dir = cmd->sc_data_direction; + + if (cmd->use_sg) { + struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer; + ptr = (struct ScsiInqData *)(srb->virt_map[0] + sg->offset); + } else { + ptr = (struct ScsiInqData *)(cmd->request_buffer); + } + + dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid, + srb->cmd->device->id, srb->cmd->device->lun); + dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p addr=%p\n", + srb, cmd->use_sg, srb->sg_index, srb->sg_count, + cmd->request_buffer, ptr); + status = srb->target_status; + if (srb->flag & AUTO_REQSENSE) { + dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); + pci_unmap_srb_sense(acb, srb); + /* + ** target status.......................... + */ + srb->flag &= ~AUTO_REQSENSE; + srb->adapter_status = 0; + srb->target_status = CHECK_CONDITION << 1; + if (debug_enabled(DBG_1)) { + switch (cmd->sense_buffer[2] & 0x0f) { + case NOT_READY: + dprintkl(KERN_DEBUG, + "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", + cmd->cmnd[0], dcb->target_id, + dcb->target_lun, status, acb->scan_devices); + break; + case UNIT_ATTENTION: + dprintkl(KERN_DEBUG, + "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", + cmd->cmnd[0], dcb->target_id, + dcb->target_lun, status, acb->scan_devices); + break; + case ILLEGAL_REQUEST: + dprintkl(KERN_DEBUG, + "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", + cmd->cmnd[0], dcb->target_id, + dcb->target_lun, status, acb->scan_devices); + break; + case MEDIUM_ERROR: + dprintkl(KERN_DEBUG, + "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", + cmd->cmnd[0], dcb->target_id, + dcb->target_lun, status, acb->scan_devices); + break; + case HARDWARE_ERROR: + dprintkl(KERN_DEBUG, + "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", + cmd->cmnd[0], dcb->target_id, + dcb->target_lun, status, acb->scan_devices); + break; + } + if (cmd->sense_buffer[7] >= 6) + printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x " + "(0x%08x 0x%08x)\n", + cmd->sense_buffer[2], cmd->sense_buffer[12], + cmd->sense_buffer[13], + *((unsigned int *)(cmd->sense_buffer + 3)), + *((unsigned int *)(cmd->sense_buffer + 8))); + else + printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n", + cmd->sense_buffer[2], + *((unsigned int *)(cmd->sense_buffer + 3))); + } + + if (status == (CHECK_CONDITION << 1)) { + cmd->result = DID_BAD_TARGET << 16; + goto ckc_e; + } + dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n"); + + if (srb->total_xfer_length + && srb->total_xfer_length >= cmd->underflow) + cmd->result = + MK_RES_LNX(DRIVER_SENSE, DID_OK, + srb->end_message, CHECK_CONDITION); + /*SET_RES_DID(cmd->result,DID_OK) */ + else + cmd->result = + MK_RES_LNX(DRIVER_SENSE, DID_OK, + srb->end_message, CHECK_CONDITION); + + goto ckc_e; + } + +/*************************************************************/ + if (status) { + /* + * target status.......................... + */ + if (status_byte(status) == CHECK_CONDITION) { + request_sense(acb, dcb, srb); + return; + } else if (status_byte(status) == QUEUE_FULL) { + tempcnt = (u8)list_size(&dcb->srb_going_list); + dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n", + dcb->target_id, dcb->target_lun, tempcnt); + if (tempcnt > 1) + tempcnt--; + dcb->max_command = tempcnt; + free_tag(dcb, srb); + srb_going_to_waiting_move(dcb, srb); + waiting_set_timer(acb, HZ / 20); + srb->adapter_status = 0; + srb->target_status = 0; + return; + } else if (status == SCSI_STAT_SEL_TIMEOUT) { + srb->adapter_status = H_SEL_TIMEOUT; + srb->target_status = 0; + cmd->result = DID_NO_CONNECT << 16; + } else { + srb->adapter_status = 0; + SET_RES_DID(cmd->result, DID_ERROR); + SET_RES_MSG(cmd->result, srb->end_message); + SET_RES_TARGET(cmd->result, status); + + } + } else { + /* + ** process initiator status.......................... + */ + status = srb->adapter_status; + if (status & H_OVER_UNDER_RUN) { + srb->target_status = 0; + SET_RES_DID(cmd->result, DID_OK); + SET_RES_MSG(cmd->result, srb->end_message); + } else if (srb->status & PARITY_ERROR) { + SET_RES_DID(cmd->result, DID_PARITY); + SET_RES_MSG(cmd->result, srb->end_message); + } else { /* No error */ + + srb->adapter_status = 0; + srb->target_status = 0; + SET_RES_DID(cmd->result, DID_OK); + } + } + + if (dir != PCI_DMA_NONE) { + if (cmd->use_sg) + pci_dma_sync_sg_for_cpu(acb->dev, + (struct scatterlist *)cmd-> + request_buffer, cmd->use_sg, dir); + else if (cmd->request_buffer) + pci_dma_sync_single_for_cpu(acb->dev, + srb->segment_x[0].address, + cmd->request_bufflen, dir); + } + + if ((cmd->result & RES_DID) == 0 && cmd->cmnd[0] == INQUIRY + && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8 + && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) + dcb->inquiry7 = ptr->Flags; +/* Check Error Conditions */ + ckc_e: + + /*if( srb->cmd->cmnd[0] == INQUIRY && */ + /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */ + if (cmd->cmnd[0] == INQUIRY && (cmd->result == (DID_OK << 16) + || status_byte(cmd-> + result) & + CHECK_CONDITION)) { + + if (!dcb->init_tcq_flag) { + add_dev(acb, dcb, ptr); + dcb->init_tcq_flag = 1; + } + + } + + + /* Here is the info for Doug Gilbert's sg3 ... */ + cmd->resid = srb->total_xfer_length; + /* This may be interpreted by sb. or not ... */ + cmd->SCp.this_residual = srb->total_xfer_length; + cmd->SCp.buffers_residual = 0; + if (debug_enabled(DBG_KG)) { + if (srb->total_xfer_length) + dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> " + "cmnd=0x%02x Missed %i bytes\n", + cmd->pid, cmd->device->id, cmd->device->lun, + cmd->cmnd[0], srb->total_xfer_length); + } + + srb_going_remove(dcb, srb); + /* Add to free list */ + if (srb == acb->tmp_srb) + dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); + else { + dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n", + cmd->pid, cmd->result); + srb_free_insert(acb, srb); + } + pci_unmap_srb(acb, srb); + + cmd->scsi_done(cmd); + waiting_process_next(acb); +} + + +/* abort all cmds in our queues */ +static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag, + struct scsi_cmnd *cmd, u8 force) +{ + struct DeviceCtlBlk *dcb; + dprintkl(KERN_INFO, "doing_srb_done: pids "); + + list_for_each_entry(dcb, &acb->dcb_list, list) { + struct ScsiReqBlk *srb; + struct ScsiReqBlk *tmp; + struct scsi_cmnd *p; + + list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) { + enum dma_data_direction dir; + int result; + + p = srb->cmd; + dir = p->sc_data_direction; + result = MK_RES(0, did_flag, 0, 0); + printk("G:%li(%02i-%i) ", p->pid, + p->device->id, p->device->lun); + srb_going_remove(dcb, srb); + free_tag(dcb, srb); + srb_free_insert(acb, srb); + p->result = result; + pci_unmap_srb_sense(acb, srb); + pci_unmap_srb(acb, srb); + if (force) { + /* For new EH, we normally don't need to give commands back, + * as they all complete or all time out */ + p->scsi_done(p); + } + } + if (!list_empty(&dcb->srb_going_list)) + dprintkl(KERN_DEBUG, + "How could the ML send cmnds to the Going queue? <%02i-%i>\n", + dcb->target_id, dcb->target_lun); + if (dcb->tag_mask) + dprintkl(KERN_DEBUG, + "tag_mask for <%02i-%i> should be empty, is %08x!\n", + dcb->target_id, dcb->target_lun, + dcb->tag_mask); + + /* Waiting queue */ + list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) { + int result; + p = srb->cmd; + + result = MK_RES(0, did_flag, 0, 0); + printk("W:%li<%02i-%i>", p->pid, p->device->id, + p->device->lun); + srb_waiting_remove(dcb, srb); + srb_free_insert(acb, srb); + p->result = result; + pci_unmap_srb_sense(acb, srb); + pci_unmap_srb(acb, srb); + if (force) { + /* For new EH, we normally don't need to give commands back, + * as they all complete or all time out */ + cmd->scsi_done(cmd); + } + } + if (!list_empty(&dcb->srb_waiting_list)) + dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n", + list_size(&dcb->srb_waiting_list), dcb->target_id, + dcb->target_lun); + dcb->flag &= ~ABORT_DEV_; + } + printk("\n"); +} + + +static void reset_scsi_bus(struct AdapterCtlBlk *acb) +{ + dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb); + acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */ + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); + + while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET)) + /* nothing */; +} + + +static void set_basic_config(struct AdapterCtlBlk *acb) +{ + u8 bval; + u16 wval; + DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout); + if (acb->config & HCC_PARITY) + bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK; + else + bval = PHASELATCH | INITIATOR | BLOCKRST; + + DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval); + + /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */ + DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */ + /* program Host ID */ + DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); + /* set ansynchronous transfer */ + DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00); + /* Turn LED control off */ + wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F; + DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval); + /* DMA config */ + wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL; + wval |= + DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ; + DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval); + /* Clear pending interrupt status */ + DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); + /* Enable SCSI interrupt */ + DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F); + DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR + /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */ + ); +} + + +static void scsi_reset_detect(struct AdapterCtlBlk *acb) +{ + dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb); + /* delay half a second */ + if (timer_pending(&acb->waiting_timer)) + del_timer(&acb->waiting_timer); + + DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); + DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); + /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */ + udelay(500); + /* Maybe we locked up the bus? Then lets wait even longer ... */ + acb->scsi_host->last_reset = + jiffies + 5 * HZ / 2 + + HZ * acb->eeprom.delay_time; + + clear_fifo(acb, "scsi_reset_detect"); + set_basic_config(acb); + /*1.25 */ + /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */ + + if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */ + acb->acb_flag |= RESET_DONE; + } else { + acb->acb_flag |= RESET_DETECT; + reset_dev_param(acb); + doing_srb_done(acb, DID_RESET, NULL, 1); + /*DC395x_RecoverSRB( acb ); */ + acb->active_dcb = NULL; + acb->acb_flag = 0; + waiting_process_next(acb); + } +} + + +static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, + struct ScsiReqBlk *srb) +{ + struct scsi_cmnd *cmd = srb->cmd; + dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n", + cmd->pid, cmd->device->id, cmd->device->lun); + + srb->flag |= AUTO_REQSENSE; + srb->adapter_status = 0; + srb->target_status = 0; + + /* KG: Can this prevent crap sense data ? */ + memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); + + /* Save some data */ + srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address = + srb->segment_x[0].address; + srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length = + srb->segment_x[0].length; + srb->xferred = srb->total_xfer_length; + /* srb->segment_x : a one entry of S/G list table */ + srb->total_xfer_length = sizeof(cmd->sense_buffer); + srb->segment_x[0].length = sizeof(cmd->sense_buffer); + /* Map sense buffer */ + srb->segment_x[0].address = + pci_map_single(acb->dev, cmd->sense_buffer, + sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE); + dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", + cmd->sense_buffer, srb->segment_x[0].address, + sizeof(cmd->sense_buffer)); + srb->sg_count = 1; + srb->sg_index = 0; + + if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */ + dprintkl(KERN_DEBUG, + "request_sense: (pid#%li) failed <%02i-%i>\n", + srb->cmd->pid, dcb->target_id, dcb->target_lun); + srb_going_to_waiting_move(dcb, srb); + waiting_set_timer(acb, HZ / 100); + } +} + + +/** + * device_alloc - Allocate a new device instance. This create the + * devices instance and sets up all the data items. The adapter + * instance is required to obtain confiuration information for this + * device. This does *not* add this device to the adapters device + * list. + * + * @acb: The adapter to obtain configuration information from. + * @target: The target for the new device. + * @lun: The lun for the new device. + * + * Return the new device if succesfull or NULL on failure. + **/ +static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb, + u8 target, u8 lun) +{ + struct NvRamType *eeprom = &acb->eeprom; + u8 period_index = eeprom->target[target].period & 0x07; + struct DeviceCtlBlk *dcb; + + dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC); + dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun); + if (!dcb) + return NULL; + dcb->acb = NULL; + INIT_LIST_HEAD(&dcb->srb_going_list); + INIT_LIST_HEAD(&dcb->srb_waiting_list); + dcb->active_srb = NULL; + dcb->tag_mask = 0; + dcb->max_command = 1; + dcb->target_id = target; + dcb->target_lun = lun; +#ifndef DC395x_NO_DISCONNECT + dcb->identify_msg = + IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); +#else + dcb->identify_msg = IDENTIFY(0, lun); +#endif + dcb->dev_mode = eeprom->target[target].cfg0; + dcb->inquiry7 = 0; + dcb->sync_mode = 0; + dcb->min_nego_period = clock_period[period_index]; + dcb->sync_period = 0; + dcb->sync_offset = 0; + dcb->flag = 0; + +#ifndef DC395x_NO_WIDE + if ((dcb->dev_mode & NTC_DO_WIDE_NEGO) + && (acb->config & HCC_WIDE_CARD)) + dcb->sync_mode |= WIDE_NEGO_ENABLE; +#endif +#ifndef DC395x_NO_SYNC + if (dcb->dev_mode & NTC_DO_SYNC_NEGO) + if (!(lun) || current_sync_offset) + dcb->sync_mode |= SYNC_NEGO_ENABLE; +#endif + if (dcb->target_lun != 0) { + /* Copy settings */ + struct DeviceCtlBlk *p; + list_for_each_entry(p, &acb->dcb_list, list) + if (p->target_id == dcb->target_id) + break; + dprintkdbg(DBG_1, + "device_alloc: <%02i-%i> copy from <%02i-%i>\n", + dcb->target_id, dcb->target_lun, + p->target_id, p->target_lun); + dcb->sync_mode = p->sync_mode; + dcb->sync_period = p->sync_period; + dcb->min_nego_period = p->min_nego_period; + dcb->sync_offset = p->sync_offset; + dcb->inquiry7 = p->inquiry7; + } + return dcb; +} + + +/** + * adapter_add_device - Adds the device instance to the adaptor instance. + * + * @acb: The adapter device to be updated + * @dcb: A newly created and intialised device instance to add. + **/ +static void adapter_add_device(struct AdapterCtlBlk *acb, + struct DeviceCtlBlk *dcb) +{ + /* backpointer to adapter */ + dcb->acb = acb; + + /* set run_robin to this device if it is currently empty */ + if (list_empty(&acb->dcb_list)) + acb->dcb_run_robin = dcb; + + /* add device to list */ + list_add_tail(&dcb->list, &acb->dcb_list); + + /* update device maps */ + acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun); + acb->children[dcb->target_id][dcb->target_lun] = dcb; +} + + +/** + * adapter_remove_device - Removes the device instance from the adaptor + * instance. The device instance is not check in any way or freed by this. + * The caller is expected to take care of that. This will simply remove the + * device from the adapters data strcutures. + * + * @acb: The adapter device to be updated + * @dcb: A device that has previously been added to the adapter. + **/ +static void adapter_remove_device(struct AdapterCtlBlk *acb, + struct DeviceCtlBlk *dcb) +{ + struct DeviceCtlBlk *i; + struct DeviceCtlBlk *tmp; + dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n", + dcb->target_id, dcb->target_lun); + + /* fix up any pointers to this device that we have in the adapter */ + if (acb->active_dcb == dcb) + acb->active_dcb = NULL; + if (acb->dcb_run_robin == dcb) + acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb); + + /* unlink from list */ + list_for_each_entry_safe(i, tmp, &acb->dcb_list, list) + if (dcb == i) { + list_del(&i->list); + break; + } + + /* clear map and children */ + acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun); + acb->children[dcb->target_id][dcb->target_lun] = NULL; + dcb->acb = NULL; +} + + +/** + * adapter_remove_and_free_device - Removes a single device from the adapter + * and then frees the device information. + * + * @acb: The adapter device to be updated + * @dcb: A device that has previously been added to the adapter. + */ +static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, + struct DeviceCtlBlk *dcb) +{ + if (list_size(&dcb->srb_going_list) > 1) { + dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> " + "Won't remove because of %i active requests.\n", + dcb->target_id, dcb->target_lun, + list_size(&dcb->srb_going_list)); + return; + } + adapter_remove_device(acb, dcb); + kfree(dcb); +} + + +/** + * adapter_remove_and_free_all_devices - Removes and frees all of the + * devices associated with the specified adapter. + * + * @acb: The adapter from which all devices should be removed. + **/ +static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb) +{ + struct DeviceCtlBlk *dcb; + struct DeviceCtlBlk *tmp; + dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n", + list_size(&acb->dcb_list)); + + list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list) + adapter_remove_and_free_device(acb, dcb); +} + + +/** + * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new + * scsi device that we need to deal with. We allocate a new device and then + * insert that device into the adapters device list. + * + * @scsi_device: The new scsi device that we need to handle. + **/ +static int dc395x_slave_alloc(struct scsi_device *scsi_device) +{ + struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; + struct DeviceCtlBlk *dcb; + + dcb = device_alloc(acb, scsi_device->id, scsi_device->lun); + if (!dcb) + return -ENOMEM; + adapter_add_device(acb, dcb); + + return 0; +} + + +/** + * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a + * device that is going away. + * + * @scsi_device: The new scsi device that we need to handle. + **/ +static void dc395x_slave_destroy(struct scsi_device *scsi_device) +{ + struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; + struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun); + if (dcb) + adapter_remove_and_free_device(acb, dcb); +} + + + + +/** + * trms1040_wait_30us: wait for 30 us + * + * Waits for 30us (using the chip by the looks of it..) + * + * @io_port: base I/O address + **/ +static void __devinit trms1040_wait_30us(unsigned long io_port) +{ + /* ScsiPortStallExecution(30); wait 30 us */ + outb(5, io_port + TRM_S1040_GEN_TIMER); + while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT)) + /* nothing */ ; +} + + +/** + * trms1040_write_cmd - write the secified command and address to + * chip + * + * @io_port: base I/O address + * @cmd: SB + op code (command) to send + * @addr: address to send + **/ +static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr) +{ + int i; + u8 send_data; + + /* program SB + OP code */ + for (i = 0; i < 3; i++, cmd <<= 1) { + send_data = NVR_SELECT; + if (cmd & 0x04) /* Start from bit 2 */ + send_data |= NVR_BITOUT; + + outb(send_data, io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + outb((send_data | NVR_CLOCK), + io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + } + + /* send address */ + for (i = 0; i < 7; i++, addr <<= 1) { + send_data = NVR_SELECT; + if (addr & 0x40) /* Start from bit 6 */ + send_data |= NVR_BITOUT; + + outb(send_data, io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + outb((send_data | NVR_CLOCK), + io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + } + outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); +} + + +/** + * trms1040_set_data - store a single byte in the eeprom + * + * Called from write all to write a single byte into the SSEEPROM + * Which is done one bit at a time. + * + * @io_port: base I/O address + * @addr: offset into EEPROM + * @byte: bytes to write + **/ +static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte) +{ + int i; + u8 send_data; + + /* Send write command & address */ + trms1040_write_cmd(io_port, 0x05, addr); + + /* Write data */ + for (i = 0; i < 8; i++, byte <<= 1) { + send_data = NVR_SELECT; + if (byte & 0x80) /* Start from bit 7 */ + send_data |= NVR_BITOUT; + + outb(send_data, io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + } + outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + + /* Disable chip select */ + outb(0, io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + + outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + + /* Wait for write ready */ + while (1) { + outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + + outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + + if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) + break; + } + + /* Disable chip select */ + outb(0, io_port + TRM_S1040_GEN_NVRAM); +} + + +/** + * trms1040_write_all - write 128 bytes to the eeprom + * + * Write the supplied 128 bytes to the chips SEEPROM + * + * @eeprom: the data to write + * @io_port: the base io port + **/ +static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port) +{ + u8 *b_eeprom = (u8 *)eeprom; + u8 addr; + + /* Enable SEEPROM */ + outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), + io_port + TRM_S1040_GEN_CONTROL); + + /* write enable */ + trms1040_write_cmd(io_port, 0x04, 0xFF); + outb(0, io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + + /* write */ + for (addr = 0; addr < 128; addr++, b_eeprom++) + trms1040_set_data(io_port, addr, *b_eeprom); + + /* write disable */ + trms1040_write_cmd(io_port, 0x04, 0x00); + outb(0, io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + + /* Disable SEEPROM */ + outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), + io_port + TRM_S1040_GEN_CONTROL); +} + + +/** + * trms1040_get_data - get a single byte from the eeprom + * + * Called from read all to read a single byte into the SSEEPROM + * Which is done one bit at a time. + * + * @io_port: base I/O address + * @addr: offset into SEEPROM + * + * Returns the the byte read. + **/ +static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr) +{ + int i; + u8 read_byte; + u8 result = 0; + + /* Send read command & address */ + trms1040_write_cmd(io_port, 0x06, addr); + + /* read data */ + for (i = 0; i < 8; i++) { + outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); + trms1040_wait_30us(io_port); + outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); + + /* Get data bit while falling edge */ + read_byte = inb(io_port + TRM_S1040_GEN_NVRAM); + result <<= 1; + if (read_byte & NVR_BITIN) + result |= 1; + + trms1040_wait_30us(io_port); + } + + /* Disable chip select */ + outb(0, io_port + TRM_S1040_GEN_NVRAM); + return result; +} + + +/** + * trms1040_read_all - read all bytes from the eeprom + * + * Read the 128 bytes from the SEEPROM. + * + * @eeprom: where to store the data + * @io_port: the base io port + **/ +static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port) +{ + u8 *b_eeprom = (u8 *)eeprom; + u8 addr; + + /* Enable SEEPROM */ + outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), + io_port + TRM_S1040_GEN_CONTROL); + + /* read details */ + for (addr = 0; addr < 128; addr++, b_eeprom++) + *b_eeprom = trms1040_get_data(io_port, addr); + + /* Disable SEEPROM */ + outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), + io_port + TRM_S1040_GEN_CONTROL); +} + + + +/** + * check_eeprom - get and check contents of the eeprom + * + * Read seeprom 128 bytes into the memory provider in eeprom. + * Checks the checksum and if it's not correct it uses a set of default + * values. + * + * @eeprom: caller allocated strcuture to read the eeprom data into + * @io_port: io port to read from + **/ +static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port) +{ + u16 *w_eeprom = (u16 *)eeprom; + u16 w_addr; + u16 cksum; + u32 d_addr; + u32 *d_eeprom; + + trms1040_read_all(eeprom, io_port); /* read eeprom */ + + cksum = 0; + for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64; + w_addr++, w_eeprom++) + cksum += *w_eeprom; + if (cksum != 0x1234) { + /* + * Checksum is wrong. + * Load a set of defaults into the eeprom buffer + */ + dprintkl(KERN_WARNING, + "EEProm checksum error: using default values and options.\n"); + eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; + eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); + eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; + eeprom->sub_sys_id[1] = + (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); + eeprom->sub_class = 0x00; + eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; + eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); + eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; + eeprom->device_id[1] = + (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); + eeprom->reserved = 0x00; + + for (d_addr = 0, d_eeprom = (u32 *)eeprom->target; + d_addr < 16; d_addr++, d_eeprom++) + *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */ + + *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */ + *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */ + for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++) + *d_eeprom = 0x00; + + /* Now load defaults (maybe set by boot/module params) */ + set_safe_settings(); + fix_settings(); + eeprom_override(eeprom); + + eeprom->cksum = 0x00; + for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom; + w_addr < 63; w_addr++, w_eeprom++) + cksum += *w_eeprom; + + *w_eeprom = 0x1234 - cksum; + trms1040_write_all(eeprom, io_port); + eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value; + } else { + set_safe_settings(); + eeprom_index_to_delay(eeprom); + eeprom_override(eeprom); + } +} + + +/** + * print_eeprom_settings - output the eeprom settings + * to the kernel log so people can see what they were. + * + * @eeprom: The eeprom data strucutre to show details for. + **/ +static void __devinit print_eeprom_settings(struct NvRamType *eeprom) +{ + dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n", + eeprom->scsi_id, + eeprom->target[0].period, + clock_speed[eeprom->target[0].period] / 10, + clock_speed[eeprom->target[0].period] % 10, + eeprom->target[0].cfg0); + dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n", + eeprom->channel_cfg, eeprom->max_tag, + 1 << eeprom->max_tag, eeprom->delay_time); +} + + +/* Free SG tables */ +static void adapter_sg_tables_free(struct AdapterCtlBlk *acb) +{ + int i; + const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; + + for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page) + kfree(acb->srb_array[i].segment_x); + + vfree(acb->srb_array[0].virt_map); +} + + +/* + * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*) + * should never cross a page boundary */ +static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb) +{ + const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1) + *SEGMENTX_LEN; + int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE; + const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; + int srb_idx = 0; + unsigned i = 0; + struct SGentry *ptr; + void **virt_array; + + for (i = 0; i < DC395x_MAX_SRB_CNT; i++) { + acb->srb_array[i].segment_x = NULL; + acb->srb_array[i].virt_map = NULL; + } + + dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages); + while (pages--) { + ptr = (struct SGentry *)kmalloc(PAGE_SIZE, GFP_KERNEL); + if (!ptr) { + adapter_sg_tables_free(acb); + return 1; + } + dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n", + PAGE_SIZE, ptr, srb_idx); + i = 0; + while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT) + acb->srb_array[srb_idx++].segment_x = + ptr + (i++ * DC395x_MAX_SG_LISTENTRY); + } + if (i < srbs_per_page) + acb->srb.segment_x = + ptr + (i * DC395x_MAX_SG_LISTENTRY); + else + dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n"); + + virt_array = vmalloc((DC395x_MAX_SRB_CNT + 1) * DC395x_MAX_SG_LISTENTRY * sizeof(void*)); + + if (!virt_array) { + adapter_sg_tables_free(acb); + return 1; + } + + for (i = 0; i < DC395x_MAX_SRB_CNT + 1; i++) { + acb->srb_array[i].virt_map = virt_array; + virt_array += DC395x_MAX_SG_LISTENTRY; + } + + return 0; +} + + + +/** + * adapter_print_config - print adapter connection and termination + * config + * + * The io port in the adapter needs to have been set before calling + * this function. + * + * @acb: The adapter to print the information for. + **/ +static void __devinit adapter_print_config(struct AdapterCtlBlk *acb) +{ + u8 bval; + + bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS); + dprintkl(KERN_INFO, "%sConnectors: ", + ((bval & WIDESCSI) ? "(Wide) " : "")); + if (!(bval & CON5068)) + printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50"); + if (!(bval & CON68)) + printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)"); + if (!(bval & CON50)) + printk("int50 "); + if ((bval & (CON5068 | CON50 | CON68)) == + 0 /*(CON5068 | CON50 | CON68) */ ) + printk(" Oops! (All 3?) "); + bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL); + printk(" Termination: "); + if (bval & DIS_TERM) + printk("Disabled\n"); + else { + if (bval & AUTOTERM) + printk("Auto "); + if (bval & LOW8TERM) + printk("Low "); + if (bval & UP8TERM) + printk("High "); + printk("\n"); + } +} + + +/** + * adapter_init_params - Initialize the various parameters in the + * adapter structure. Note that the pointer to the scsi_host is set + * early (when this instance is created) and the io_port and irq + * values are set later after they have been reserved. This just gets + * everything set to a good starting position. + * + * The eeprom structure in the adapter needs to have been set before + * calling this function. + * + * @acb: The adapter to initialize. + **/ +static void __devinit adapter_init_params(struct AdapterCtlBlk *acb) +{ + struct NvRamType *eeprom = &acb->eeprom; + int i; + + /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */ + /* NOTE: acb->io_port_base is set at port registration time */ + /* NOTE: acb->io_port_len is set at port registration time */ + + INIT_LIST_HEAD(&acb->dcb_list); + acb->dcb_run_robin = NULL; + acb->active_dcb = NULL; + + INIT_LIST_HEAD(&acb->srb_free_list); + /* temp SRB for Q tag used or abort command used */ + acb->tmp_srb = &acb->srb; + init_timer(&acb->waiting_timer); + init_timer(&acb->selto_timer); + + acb->srb_count = DC395x_MAX_SRB_CNT; + + acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */ + /* NOTE: acb->irq_level is set at IRQ registration time */ + + acb->tag_max_num = 1 << eeprom->max_tag; + if (acb->tag_max_num > 30) + acb->tag_max_num = 30; + + acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */ + acb->gmode2 = eeprom->channel_cfg; + acb->config = 0; /* NOTE: actually set in adapter_init_chip */ + + if (eeprom->channel_cfg & NAC_SCANLUN) + acb->lun_chk = 1; + acb->scan_devices = 1; + + acb->scsi_host->this_id = eeprom->scsi_id; + acb->hostid_bit = (1 << acb->scsi_host->this_id); + + for (i = 0; i < DC395x_MAX_SCSI_ID; i++) + acb->dcb_map[i] = 0; + + acb->msg_len = 0; + + /* link static array of srbs into the srb free list */ + for (i = 0; i < acb->srb_count - 1; i++) + srb_free_insert(acb, &acb->srb_array[i]); +} + + +/** + * adapter_init_host - Initialize the scsi host instance based on + * values that we have already stored in the adapter instance. There's + * some mention that a lot of these are deprecated, so we won't use + * them (we'll use the ones in the adapter instance) but we'll fill + * them in in case something else needs them. + * + * The eeprom structure, irq and io ports in the adapter need to have + * been set before calling this function. + * + * @host: The scsi host instance to fill in the values for. + **/ +static void __devinit adapter_init_scsi_host(struct Scsi_Host *host) +{ + struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; + struct NvRamType *eeprom = &acb->eeprom; + + host->max_cmd_len = 24; + host->can_queue = DC395x_MAX_CMD_QUEUE; + host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN; + host->this_id = (int)eeprom->scsi_id; + host->io_port = acb->io_port_base; + host->n_io_port = acb->io_port_len; + host->dma_channel = -1; + host->unique_id = acb->io_port_base; + host->irq = acb->irq_level; + host->last_reset = jiffies; + + host->max_id = 16; + if (host->max_id - 1 == eeprom->scsi_id) + host->max_id--; + +#ifdef CONFIG_SCSI_MULTI_LUN + if (eeprom->channel_cfg & NAC_SCANLUN) + host->max_lun = 8; + else + host->max_lun = 1; +#else + host->max_lun = 1; +#endif + +} + + +/** + * adapter_init_chip - Get the chip into a know state and figure out + * some of the settings that apply to this adapter. + * + * The io port in the adapter needs to have been set before calling + * this function. The config will be configured correctly on return. + * + * @acb: The adapter which we are to init. + **/ +static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb) +{ + struct NvRamType *eeprom = &acb->eeprom; + + /* Mask all the interrupt */ + DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); + DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); + + /* Reset SCSI module */ + DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); + + /* Reset PCI/DMA module */ + DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); + udelay(20); + + /* program configuration 0 */ + acb->config = HCC_AUTOTERM | HCC_PARITY; + if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI) + acb->config |= HCC_WIDE_CARD; + + if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET) + acb->config |= HCC_SCSI_RESET; + + if (acb->config & HCC_SCSI_RESET) { + dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n"); + DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); + + /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */ + /*spin_unlock_irq (&io_request_lock); */ + udelay(500); + + acb->scsi_host->last_reset = + jiffies + HZ / 2 + + HZ * acb->eeprom.delay_time; + + /*spin_lock_irq (&io_request_lock); */ + } +} + + +/** + * init_adapter - Grab the resource for the card, setup the adapter + * information, set the card into a known state, create the various + * tables etc etc. This basically gets all adapter information all up + * to date, intialised and gets the chip in sync with it. + * + * @host: This hosts adapter structure + * @io_port: The base I/O port + * @irq: IRQ + * + * Returns 0 if the initialization succeeds, any other value on + * failure. + **/ +static int __devinit adapter_init(struct AdapterCtlBlk *acb, + unsigned long io_port, u32 io_port_len, unsigned int irq) +{ + if (!request_region(io_port, io_port_len, DC395X_NAME)) { + dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port); + goto failed; + } + /* store port base to indicate we have registered it */ + acb->io_port_base = io_port; + acb->io_port_len = io_port_len; + + if (request_irq(irq, dc395x_interrupt, SA_SHIRQ, DC395X_NAME, acb)) { + /* release the region we just claimed */ + dprintkl(KERN_INFO, "Failed to register IRQ\n"); + goto failed; + } + /* store irq to indicate we have registered it */ + acb->irq_level = irq; + + /* get eeprom configuration information and command line settings etc */ + check_eeprom(&acb->eeprom, io_port); + print_eeprom_settings(&acb->eeprom); + + /* setup adapter control block */ + adapter_init_params(acb); + + /* display card connectors/termination settings */ + adapter_print_config(acb); + + if (adapter_sg_tables_alloc(acb)) { + dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n"); + goto failed; + } + adapter_init_scsi_host(acb->scsi_host); + adapter_init_chip(acb); + set_basic_config(acb); + + dprintkdbg(DBG_0, + "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p " + "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n", + acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk), + sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk)); + return 0; + +failed: + if (acb->irq_level) + free_irq(acb->irq_level, acb); + if (acb->io_port_base) + release_region(acb->io_port_base, acb->io_port_len); + adapter_sg_tables_free(acb); + + return 1; +} + + +/** + * adapter_uninit_chip - cleanly shut down the scsi controller chip, + * stopping all operations and disabling interrupt generation on the + * card. + * + * @acb: The adapter which we are to shutdown. + **/ +static void adapter_uninit_chip(struct AdapterCtlBlk *acb) +{ + /* disable interrupts */ + DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0); + DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0); + + /* reset the scsi bus */ + if (acb->config & HCC_SCSI_RESET) + reset_scsi_bus(acb); + + /* clear any pending interupt state */ + DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); +} + + + +/** + * adapter_uninit - Shut down the chip and release any resources that + * we had allocated. Once this returns the adapter should not be used + * anymore. + * + * @acb: The adapter which we are to un-initialize. + **/ +static void adapter_uninit(struct AdapterCtlBlk *acb) +{ + unsigned long flags; + DC395x_LOCK_IO(acb->scsi_host, flags); + + /* remove timers */ + if (timer_pending(&acb->waiting_timer)) + del_timer(&acb->waiting_timer); + if (timer_pending(&acb->selto_timer)) + del_timer(&acb->selto_timer); + + adapter_uninit_chip(acb); + adapter_remove_and_free_all_devices(acb); + DC395x_UNLOCK_IO(acb->scsi_host, flags); + + if (acb->irq_level) + free_irq(acb->irq_level, acb); + if (acb->io_port_base) + release_region(acb->io_port_base, acb->io_port_len); + + adapter_sg_tables_free(acb); +} + + +#undef SPRINTF +#define SPRINTF(args...) pos += sprintf(pos, args) + +#undef YESNO +#define YESNO(YN) \ + if (YN) SPRINTF(" Yes ");\ + else SPRINTF(" No ") + +static int dc395x_proc_info(struct Scsi_Host *host, char *buffer, + char **start, off_t offset, int length, int inout) +{ + struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; + int spd, spd1; + char *pos = buffer; + struct DeviceCtlBlk *dcb; + unsigned long flags; + int dev; + + if (inout) /* Has data been written to the file ? */ + return -EPERM; + + SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n"); + SPRINTF(" Driver Version " DC395X_VERSION "\n"); + + DC395x_LOCK_IO(acb->scsi_host, flags); + + SPRINTF("SCSI Host Nr %i, ", host->host_no); + SPRINTF("DC395U/UW/F DC315/U %s\n", + (acb->config & HCC_WIDE_CARD) ? "Wide" : ""); + SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base); + SPRINTF("irq_level 0x%04x, ", acb->irq_level); + SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); + + SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun); + SPRINTF("AdapterID %i\n", host->this_id); + + SPRINTF("tag_max_num %i", acb->tag_max_num); + /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ + SPRINTF(", FilterCfg 0x%02x", + DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); + SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time); + /*SPRINTF("\n"); */ + + SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list)); + SPRINTF + ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n", + acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2], + acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5], + acb->dcb_map[6], acb->dcb_map[7]); + SPRINTF + (" %02x %02x %02x %02x %02x %02x %02x %02x\n", + acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10], + acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13], + acb->dcb_map[14], acb->dcb_map[15]); + + SPRINTF + ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n"); + + dev = 0; + list_for_each_entry(dcb, &acb->dcb_list, list) { + int nego_period; + SPRINTF("%02i %02i %02i ", dev, dcb->target_id, + dcb->target_lun); + YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK); + YESNO(dcb->sync_offset); + YESNO(dcb->sync_period & WIDE_SYNC); + YESNO(dcb->dev_mode & NTC_DO_DISCONNECT); + YESNO(dcb->dev_mode & NTC_DO_SEND_START); + YESNO(dcb->sync_mode & EN_TAG_QUEUEING); + nego_period = clock_period[dcb->sync_period & 0x07] << 2; + if (dcb->sync_offset) + SPRINTF(" %03i ns ", nego_period); + else + SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2)); + + if (dcb->sync_offset & 0x0f) { + spd = 1000 / (nego_period); + spd1 = 1000 % (nego_period); + spd1 = (spd1 * 10 + nego_period / 2) / (nego_period); + SPRINTF(" %2i.%1i M %02i ", spd, spd1, + (dcb->sync_offset & 0x0f)); + } else + SPRINTF(" "); + + /* Add more info ... */ + SPRINTF(" %02i\n", dcb->max_command); + dev++; + } + + if (timer_pending(&acb->waiting_timer)) + SPRINTF("Waiting queue timer running\n"); + else + SPRINTF("\n"); + + list_for_each_entry(dcb, &acb->dcb_list, list) { + struct ScsiReqBlk *srb; + if (!list_empty(&dcb->srb_waiting_list)) + SPRINTF("DCB (%02i-%i): Waiting: %i:", + dcb->target_id, dcb->target_lun, + list_size(&dcb->srb_waiting_list)); + list_for_each_entry(srb, &dcb->srb_waiting_list, list) + SPRINTF(" %li", srb->cmd->pid); + if (!list_empty(&dcb->srb_going_list)) + SPRINTF("\nDCB (%02i-%i): Going : %i:", + dcb->target_id, dcb->target_lun, + list_size(&dcb->srb_going_list)); + list_for_each_entry(srb, &dcb->srb_going_list, list) + SPRINTF(" %li", srb->cmd->pid); + if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) + SPRINTF("\n"); + } + + if (debug_enabled(DBG_1)) { + SPRINTF("DCB list for ACB %p:\n", acb); + list_for_each_entry(dcb, &acb->dcb_list, list) { + SPRINTF("%p -> ", dcb); + } + SPRINTF("END\n"); + } + + *start = buffer + offset; + DC395x_UNLOCK_IO(acb->scsi_host, flags); + + if (pos - buffer < offset) + return 0; + else if (pos - buffer - offset < length) + return pos - buffer - offset; + else + return length; +} + + +static struct scsi_host_template dc395x_driver_template = { + .module = THIS_MODULE, + .proc_name = DC395X_NAME, + .proc_info = dc395x_proc_info, + .name = DC395X_BANNER " " DC395X_VERSION, + .queuecommand = dc395x_queue_command, + .bios_param = dc395x_bios_param, + .slave_alloc = dc395x_slave_alloc, + .slave_destroy = dc395x_slave_destroy, + .can_queue = DC395x_MAX_CAN_QUEUE, + .this_id = 7, + .sg_tablesize = DC395x_MAX_SG_TABLESIZE, + .cmd_per_lun = DC395x_MAX_CMD_PER_LUN, + .eh_abort_handler = dc395x_eh_abort, + .eh_bus_reset_handler = dc395x_eh_bus_reset, + .unchecked_isa_dma = 0, + .use_clustering = DISABLE_CLUSTERING, +}; + + +/** + * banner_display - Display banner on first instance of driver + * initialized. + **/ +static void banner_display(void) +{ + static int banner_done = 0; + if (!banner_done) + { + dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION); + banner_done = 1; + } +} + + +/** + * dc395x_init_one - Initialise a single instance of the adapter. + * + * The PCI layer will call this once for each instance of the adapter + * that it finds in the system. The pci_dev strcuture indicates which + * instance we are being called from. + * + * @dev: The PCI device to intialize. + * @id: Looks like a pointer to the entry in our pci device table + * that was actually matched by the PCI subsystem. + * + * Returns 0 on success, or an error code (-ve) on failure. + **/ +static int __devinit dc395x_init_one(struct pci_dev *dev, + const struct pci_device_id *id) +{ + struct Scsi_Host *scsi_host = NULL; + struct AdapterCtlBlk *acb = NULL; + unsigned long io_port_base; + unsigned int io_port_len; + unsigned int irq; + + dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev)); + banner_display(); + + if (pci_enable_device(dev)) + { + dprintkl(KERN_INFO, "PCI Enable device failed.\n"); + return -ENODEV; + } + io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK; + io_port_len = pci_resource_len(dev, 0); + irq = dev->irq; + dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq); + + /* allocate scsi host information (includes out adapter) */ + scsi_host = scsi_host_alloc(&dc395x_driver_template, + sizeof(struct AdapterCtlBlk)); + if (!scsi_host) { + dprintkl(KERN_INFO, "scsi_host_alloc failed\n"); + goto fail; + } + acb = (struct AdapterCtlBlk*)scsi_host->hostdata; + acb->scsi_host = scsi_host; + acb->dev = dev; + + /* initialise the adapter and everything we need */ + if (adapter_init(acb, io_port_base, io_port_len, irq)) { + dprintkl(KERN_INFO, "adapter init failed\n"); + goto fail; + } + + pci_set_master(dev); + + /* get the scsi mid level to scan for new devices on the bus */ + if (scsi_add_host(scsi_host, &dev->dev)) { + dprintkl(KERN_ERR, "scsi_add_host failed\n"); + goto fail; + } + pci_set_drvdata(dev, scsi_host); + scsi_scan_host(scsi_host); + + return 0; + +fail: + if (acb != NULL) + adapter_uninit(acb); + if (scsi_host != NULL) + scsi_host_put(scsi_host); + pci_disable_device(dev); + return -ENODEV; +} + + +/** + * dc395x_remove_one - Called to remove a single instance of the + * adapter. + * + * @dev: The PCI device to intialize. + **/ +static void __devexit dc395x_remove_one(struct pci_dev *dev) +{ + struct Scsi_Host *scsi_host = pci_get_drvdata(dev); + struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata); + + dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb); + + scsi_remove_host(scsi_host); + adapter_uninit(acb); + pci_disable_device(dev); + scsi_host_put(scsi_host); + pci_set_drvdata(dev, NULL); +} + + +static struct pci_device_id dc395x_pci_table[] = { + { + .vendor = PCI_VENDOR_ID_TEKRAM, + .device = PCI_DEVICE_ID_TEKRAM_TRMS1040, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + }, + {} /* Terminating entry */ +}; +MODULE_DEVICE_TABLE(pci, dc395x_pci_table); + + +static struct pci_driver dc395x_driver = { + .name = DC395X_NAME, + .id_table = dc395x_pci_table, + .probe = dc395x_init_one, + .remove = __devexit_p(dc395x_remove_one), +}; + + +/** + * dc395x_module_init - Module initialization function + * + * Used by both module and built-in driver to initialise this driver. + **/ +static int __init dc395x_module_init(void) +{ + return pci_module_init(&dc395x_driver); +} + + +/** + * dc395x_module_exit - Module cleanup function. + **/ +static void __exit dc395x_module_exit(void) +{ + pci_unregister_driver(&dc395x_driver); +} + + +module_init(dc395x_module_init); +module_exit(dc395x_module_exit); + +MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff"); +MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series"); +MODULE_LICENSE("GPL"); |