diff options
Diffstat (limited to 'drivers/ieee1394/sbp2.c')
| -rw-r--r-- | drivers/ieee1394/sbp2.c | 2661 |
1 files changed, 0 insertions, 2661 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c deleted file mode 100644 index 18d7eda3885..00000000000 --- a/drivers/ieee1394/sbp2.c +++ /dev/null @@ -1,2661 +0,0 @@ -/* - * sbp2.c - SBP-2 protocol driver for IEEE-1394 - * - * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) - * jamesg@filanet.com (JSG) - * - * Copyright (C) 2003 Ben Collins <bcollins@debian.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software Foundation, - * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - * Brief Description: - * - * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394 - * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level - * driver. It also registers as a SCSI lower-level driver in order to accept - * SCSI commands for transport using SBP-2. - * - * You may access any attached SBP-2 storage devices as if they were SCSI - * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.). - * - * Current Issues: - * - * - Error Handling: SCSI aborts and bus reset requests are handled somewhat - * but the code needs additional debugging. - */ - -#include <linux/config.h> -#include <linux/kernel.h> -#include <linux/list.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/fs.h> -#include <linux/poll.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/types.h> -#include <linux/delay.h> -#include <linux/sched.h> -#include <linux/blkdev.h> -#include <linux/smp_lock.h> -#include <linux/init.h> -#include <linux/pci.h> - -#include <asm/current.h> -#include <asm/uaccess.h> -#include <asm/io.h> -#include <asm/byteorder.h> -#include <asm/atomic.h> -#include <asm/system.h> -#include <asm/scatterlist.h> - -#include <scsi/scsi.h> -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_dbg.h> -#include <scsi/scsi_device.h> -#include <scsi/scsi_host.h> - -#include "csr1212.h" -#include "ieee1394.h" -#include "ieee1394_types.h" -#include "ieee1394_core.h" -#include "nodemgr.h" -#include "hosts.h" -#include "highlevel.h" -#include "ieee1394_transactions.h" -#include "sbp2.h" - -/* - * Module load parameter definitions - */ - -/* - * Change max_speed on module load if you have a bad IEEE-1394 - * controller that has trouble running 2KB packets at 400mb. - * - * NOTE: On certain OHCI parts I have seen short packets on async transmit - * (probably due to PCI latency/throughput issues with the part). You can - * bump down the speed if you are running into problems. - */ -static int max_speed = IEEE1394_SPEED_MAX; -module_param(max_speed, int, 0644); -MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)"); - -/* - * Set serialize_io to 1 if you'd like only one scsi command sent - * down to us at a time (debugging). This might be necessary for very - * badly behaved sbp2 devices. - * - * TODO: Make this configurable per device. - */ -static int serialize_io = 1; -module_param(serialize_io, int, 0444); -MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)"); - -/* - * Bump up max_sectors if you'd like to support very large sized - * transfers. Please note that some older sbp2 bridge chips are broken for - * transfers greater or equal to 128KB. Default is a value of 255 - * sectors, or just under 128KB (at 512 byte sector size). I can note that - * the Oxsemi sbp2 chipsets have no problems supporting very large - * transfer sizes. - */ -static int max_sectors = SBP2_MAX_SECTORS; -module_param(max_sectors, int, 0444); -MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)"); - -/* - * Exclusive login to sbp2 device? In most cases, the sbp2 driver should - * do an exclusive login, as it's generally unsafe to have two hosts - * talking to a single sbp2 device at the same time (filesystem coherency, - * etc.). If you're running an sbp2 device that supports multiple logins, - * and you're either running read-only filesystems or some sort of special - * filesystem supporting multiple hosts (one such filesystem is OpenGFS, - * see opengfs.sourceforge.net for more info), then set exclusive_login - * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four - * concurrent logins. - */ -static int exclusive_login = 1; -module_param(exclusive_login, int, 0644); -MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"); - -/* - * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on - * if your sbp2 device is not properly handling the SCSI inquiry command. - * This hack makes the inquiry look more like a typical MS Windows - * inquiry. - * - * If force_inquiry_hack=1 is required for your device to work, - * please submit the logged sbp2_firmware_revision value of this device to - * the linux1394-devel mailing list. - */ -static int force_inquiry_hack; -module_param(force_inquiry_hack, int, 0444); -MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)"); - -/* - * Export information about protocols/devices supported by this driver. - */ -static struct ieee1394_device_id sbp2_id_table[] = { - { - .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, - .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, - .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, - {} -}; - -MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); - -/* - * Debug levels, configured via kernel config, or enable here. - */ - -#define CONFIG_IEEE1394_SBP2_DEBUG 0 -/* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */ -/* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */ -/* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */ -/* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */ -/* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */ - -#ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS -#define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args) -static u32 global_outstanding_command_orbs = 0; -#define outstanding_orb_incr global_outstanding_command_orbs++ -#define outstanding_orb_decr global_outstanding_command_orbs-- -#else -#define SBP2_ORB_DEBUG(fmt, args...) -#define outstanding_orb_incr -#define outstanding_orb_decr -#endif - -#ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA -#define SBP2_DMA_ALLOC(fmt, args...) \ - HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \ - ++global_outstanding_dmas, ## args) -#define SBP2_DMA_FREE(fmt, args...) \ - HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \ - --global_outstanding_dmas, ## args) -static u32 global_outstanding_dmas = 0; -#else -#define SBP2_DMA_ALLOC(fmt, args...) -#define SBP2_DMA_FREE(fmt, args...) -#endif - -#if CONFIG_IEEE1394_SBP2_DEBUG >= 2 -#define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) -#define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) -#define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) -#define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) -#elif CONFIG_IEEE1394_SBP2_DEBUG == 1 -#define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args) -#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) -#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) -#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) -#else -#define SBP2_DEBUG(fmt, args...) -#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) -#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) -#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) -#endif - -#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) - -/* - * Globals - */ - -static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, - u32 status); - -static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, - u32 scsi_status, struct scsi_cmnd *SCpnt, - void (*done)(struct scsi_cmnd *)); - -static struct scsi_host_template scsi_driver_template; - -static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; - -static void sbp2_host_reset(struct hpsb_host *host); - -static int sbp2_probe(struct device *dev); -static int sbp2_remove(struct device *dev); -static int sbp2_update(struct unit_directory *ud); - -static struct hpsb_highlevel sbp2_highlevel = { - .name = SBP2_DEVICE_NAME, - .host_reset = sbp2_host_reset, -}; - -static struct hpsb_address_ops sbp2_ops = { - .write = sbp2_handle_status_write -}; - -#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA -static struct hpsb_address_ops sbp2_physdma_ops = { - .read = sbp2_handle_physdma_read, - .write = sbp2_handle_physdma_write, -}; -#endif - -static struct hpsb_protocol_driver sbp2_driver = { - .name = "SBP2 Driver", - .id_table = sbp2_id_table, - .update = sbp2_update, - .driver = { - .name = SBP2_DEVICE_NAME, - .bus = &ieee1394_bus_type, - .probe = sbp2_probe, - .remove = sbp2_remove, - }, -}; - - -/* List of device firmware's that require a forced 36 byte inquiry. */ -static u32 sbp2_broken_inquiry_list[] = { - 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */ - /* DViCO Momobay CX-1 */ - 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */ - /* QPS Fire DVDBurner */ -}; - -#define NUM_BROKEN_INQUIRY_DEVS \ - (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list)) - -/************************************** - * General utility functions - **************************************/ - -#ifndef __BIG_ENDIAN -/* - * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. - */ -static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length) -{ - u32 *temp = buffer; - - for (length = (length >> 2); length--; ) - temp[length] = be32_to_cpu(temp[length]); - - return; -} - -/* - * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. - */ -static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length) -{ - u32 *temp = buffer; - - for (length = (length >> 2); length--; ) - temp[length] = cpu_to_be32(temp[length]); - - return; -} -#else /* BIG_ENDIAN */ -/* Why waste the cpu cycles? */ -#define sbp2util_be32_to_cpu_buffer(x,y) -#define sbp2util_cpu_to_be32_buffer(x,y) -#endif - -#ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP -/* - * Debug packet dump routine. Length is in bytes. - */ -static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, - u32 dump_phys_addr) -{ - int i; - unsigned char *dump = buffer; - - if (!dump || !length || !dump_name) - return; - - if (dump_phys_addr) - printk("[%s, 0x%x]", dump_name, dump_phys_addr); - else - printk("[%s]", dump_name); - for (i = 0; i < length; i++) { - if (i > 0x3f) { - printk("\n ..."); - break; - } - if ((i & 0x3) == 0) - printk(" "); - if ((i & 0xf) == 0) - printk("\n "); - printk("%02x ", (int)dump[i]); - } - printk("\n"); - - return; -} -#else -#define sbp2util_packet_dump(w,x,y,z) -#endif - -/* - * Goofy routine that basically does a down_timeout function. - */ -static int sbp2util_down_timeout(atomic_t *done, int timeout) -{ - int i; - - for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) { - if (msleep_interruptible(100)) /* 100ms */ - return 1; - } - return (i > 0) ? 0 : 1; -} - -/* Free's an allocated packet */ -static void sbp2_free_packet(struct hpsb_packet *packet) -{ - hpsb_free_tlabel(packet); - hpsb_free_packet(packet); -} - -/* This is much like hpsb_node_write(), except it ignores the response - * subaction and returns immediately. Can be used from interrupts. - */ -static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, - quadlet_t *buffer, size_t length) -{ - struct hpsb_packet *packet; - - packet = hpsb_make_writepacket(ne->host, ne->nodeid, - addr, buffer, length); - if (!packet) - return -ENOMEM; - - hpsb_set_packet_complete_task(packet, - (void (*)(void *))sbp2_free_packet, - packet); - - hpsb_node_fill_packet(ne, packet); - - if (hpsb_send_packet(packet) < 0) { - sbp2_free_packet(packet); - return -EIO; - } - - return 0; -} - -/* - * This function is called to create a pool of command orbs used for - * command processing. It is called when a new sbp2 device is detected. - */ -static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) -{ - struct sbp2scsi_host_info *hi = scsi_id->hi; - int i; - unsigned long flags, orbs; - struct sbp2_command_info *command; - - orbs = serialize_io ? 2 : SBP2_MAX_CMDS; - - spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); - for (i = 0; i < orbs; i++) { - command = kzalloc(sizeof(*command), GFP_ATOMIC); - if (!command) { - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, - flags); - return -ENOMEM; - } - command->command_orb_dma = - pci_map_single(hi->host->pdev, &command->command_orb, - sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); - SBP2_DMA_ALLOC("single command orb DMA"); - command->sge_dma = - pci_map_single(hi->host->pdev, - &command->scatter_gather_element, - sizeof(command->scatter_gather_element), - PCI_DMA_BIDIRECTIONAL); - SBP2_DMA_ALLOC("scatter_gather_element"); - INIT_LIST_HEAD(&command->list); - list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); - } - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); - return 0; -} - -/* - * This function is called to delete a pool of command orbs. - */ -static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) -{ - struct hpsb_host *host = scsi_id->hi->host; - struct list_head *lh, *next; - struct sbp2_command_info *command; - unsigned long flags; - - spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); - if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { - list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { - command = list_entry(lh, struct sbp2_command_info, list); - - /* Release our generic DMA's */ - pci_unmap_single(host->pdev, command->command_orb_dma, - sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); - SBP2_DMA_FREE("single command orb DMA"); - pci_unmap_single(host->pdev, command->sge_dma, - sizeof(command->scatter_gather_element), - PCI_DMA_BIDIRECTIONAL); - SBP2_DMA_FREE("scatter_gather_element"); - - kfree(command); - } - } - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); - return; -} - -/* - * This function finds the sbp2_command for a given outstanding command - * orb.Only looks at the inuse list. - */ -static struct sbp2_command_info *sbp2util_find_command_for_orb( - struct scsi_id_instance_data *scsi_id, dma_addr_t orb) -{ - struct sbp2_command_info *command; - unsigned long flags; - - spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); - if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { - list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { - if (command->command_orb_dma == orb) { - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); - return command; - } - } - } - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); - - SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); - - return NULL; -} - -/* - * This function finds the sbp2_command for a given outstanding SCpnt. - * Only looks at the inuse list. - */ -static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt) -{ - struct sbp2_command_info *command; - unsigned long flags; - - spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); - if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { - list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { - if (command->Current_SCpnt == SCpnt) { - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); - return command; - } - } - } - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); - return NULL; -} - -/* - * This function allocates a command orb used to send a scsi command. - */ -static struct sbp2_command_info *sbp2util_allocate_command_orb( - struct scsi_id_instance_data *scsi_id, - struct scsi_cmnd *Current_SCpnt, - void (*Current_done)(struct scsi_cmnd *)) -{ - struct list_head *lh; - struct sbp2_command_info *command = NULL; - unsigned long flags; - - spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); - if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { - lh = scsi_id->sbp2_command_orb_completed.next; - list_del(lh); - command = list_entry(lh, struct sbp2_command_info, list); - command->Current_done = Current_done; - command->Current_SCpnt = Current_SCpnt; - list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); - } else { - SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!"); - } - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); - return command; -} - -/* Free our DMA's */ -static void sbp2util_free_command_dma(struct sbp2_command_info *command) -{ - struct scsi_id_instance_data *scsi_id = - (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; - struct hpsb_host *host; - - if (!scsi_id) { - printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__); - return; - } - - host = scsi_id->ud->ne->host; - - if (command->cmd_dma) { - if (command->dma_type == CMD_DMA_SINGLE) { - pci_unmap_single(host->pdev, command->cmd_dma, - command->dma_size, command->dma_dir); - SBP2_DMA_FREE("single bulk"); - } else if (command->dma_type == CMD_DMA_PAGE) { - pci_unmap_page(host->pdev, command->cmd_dma, - command->dma_size, command->dma_dir); - SBP2_DMA_FREE("single page"); - } /* XXX: Check for CMD_DMA_NONE bug */ - command->dma_type = CMD_DMA_NONE; - command->cmd_dma = 0; - } - - if (command->sge_buffer) { - pci_unmap_sg(host->pdev, command->sge_buffer, - command->dma_size, command->dma_dir); - SBP2_DMA_FREE("scatter list"); - command->sge_buffer = NULL; - } -} - -/* - * This function moves a command to the completed orb list. - */ -static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, - struct sbp2_command_info *command) -{ - unsigned long flags; - - spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); - list_del(&command->list); - sbp2util_free_command_dma(command); - list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); -} - -/* - * Is scsi_id valid? Is the 1394 node still present? - */ -static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id) -{ - return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo; -} - -/********************************************* - * IEEE-1394 core driver stack related section - *********************************************/ -static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); - -static int sbp2_probe(struct device *dev) -{ - struct unit_directory *ud; - struct scsi_id_instance_data *scsi_id; - - SBP2_DEBUG("sbp2_probe"); - - ud = container_of(dev, struct unit_directory, device); - - /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) - * instead. */ - if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) - return -ENODEV; - - scsi_id = sbp2_alloc_device(ud); - - if (!scsi_id) - return -ENOMEM; - - sbp2_parse_unit_directory(scsi_id, ud); - - return sbp2_start_device(scsi_id); -} - -static int sbp2_remove(struct device *dev) -{ - struct unit_directory *ud; - struct scsi_id_instance_data *scsi_id; - struct scsi_device *sdev; - - SBP2_DEBUG("sbp2_remove"); - - ud = container_of(dev, struct unit_directory, device); - scsi_id = ud->device.driver_data; - if (!scsi_id) - return 0; - - /* Trigger shutdown functions in scsi's highlevel. */ - if (scsi_id->scsi_host) - scsi_unblock_requests(scsi_id->scsi_host); - sdev = scsi_id->sdev; - if (sdev) { - scsi_id->sdev = NULL; - scsi_remove_device(sdev); - } - - sbp2_logout_device(scsi_id); - sbp2_remove_device(scsi_id); - - return 0; -} - -static int sbp2_update(struct unit_directory *ud) -{ - struct scsi_id_instance_data *scsi_id = ud->device.driver_data; - - SBP2_DEBUG("sbp2_update"); - - if (sbp2_reconnect_device(scsi_id)) { - - /* - * Ok, reconnect has failed. Perhaps we didn't - * reconnect fast enough. Try doing a regular login, but - * first do a logout just in case of any weirdness. - */ - sbp2_logout_device(scsi_id); - - if (sbp2_login_device(scsi_id)) { - /* Login failed too, just fail, and the backend - * will call our sbp2_remove for us */ - SBP2_ERR("Failed to reconnect to sbp2 device!"); - return -EBUSY; - } - } - - /* Set max retries to something large on the device. */ - sbp2_set_busy_timeout(scsi_id); - - /* Do a SBP-2 fetch agent reset. */ - sbp2_agent_reset(scsi_id, 1); - - /* Get the max speed and packet size that we can use. */ - sbp2_max_speed_and_size(scsi_id); - - /* Complete any pending commands with busy (so they get - * retried) and remove them from our queue - */ - sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); - - /* Make sure we unblock requests (since this is likely after a bus - * reset). */ - scsi_unblock_requests(scsi_id->scsi_host); - - return 0; -} - -/* This functions is called by the sbp2_probe, for each new device. We now - * allocate one scsi host for each scsi_id (unit directory). */ -static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) -{ - struct sbp2scsi_host_info *hi; - struct Scsi_Host *scsi_host = NULL; - struct scsi_id_instance_data *scsi_id = NULL; - - SBP2_DEBUG("sbp2_alloc_device"); - - scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); - if (!scsi_id) { - SBP2_ERR("failed to create scsi_id"); - goto failed_alloc; - } - - scsi_id->ne = ud->ne; - scsi_id->ud = ud; - scsi_id->speed_code = IEEE1394_SPEED_100; - scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; - atomic_set(&scsi_id->sbp2_login_complete, 0); - INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); - INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); - INIT_LIST_HEAD(&scsi_id->scsi_list); - spin_lock_init(&scsi_id->sbp2_command_orb_lock); - scsi_id->sbp2_lun = 0; - - ud->device.driver_data = scsi_id; - - hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); - if (!hi) { - hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); - if (!hi) { - SBP2_ERR("failed to allocate hostinfo"); - goto failed_alloc; - } - SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); - hi->host = ud->ne->host; - INIT_LIST_HEAD(&hi->scsi_ids); - - /* Register our sbp2 status address space... */ - hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops, - SBP2_STATUS_FIFO_ADDRESS, - SBP2_STATUS_FIFO_ADDRESS + - SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1)); -#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA - /* Handle data movement if physical dma is not - * enabled/supportedon host controller */ - hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops, - 0x0ULL, 0xfffffffcULL); -#endif - } - - scsi_id->hi = hi; - - list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); - - /* Register our host with the SCSI stack. */ - scsi_host = scsi_host_alloc(&scsi_driver_template, - sizeof(unsigned long)); - if (!scsi_host) { - SBP2_ERR("failed to register scsi host"); - goto failed_alloc; - } - - scsi_host->hostdata[0] = (unsigned long)scsi_id; - - if (!scsi_add_host(scsi_host, &ud->device)) { - scsi_id->scsi_host = scsi_host; - return scsi_id; - } - - SBP2_ERR("failed to add scsi host"); - scsi_host_put(scsi_host); - -failed_alloc: - sbp2_remove_device(scsi_id); - return NULL; -} - -static void sbp2_host_reset(struct hpsb_host *host) -{ - struct sbp2scsi_host_info *hi; - struct scsi_id_instance_data *scsi_id; - - hi = hpsb_get_hostinfo(&sbp2_highlevel, host); - - if (hi) { - list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) - scsi_block_requests(scsi_id->scsi_host); - } -} - -/* - * This function is where we first pull the node unique ids, and then - * allocate memory and register a SBP-2 device. - */ -static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) -{ - struct sbp2scsi_host_info *hi = scsi_id->hi; - int error; - - SBP2_DEBUG("sbp2_start_device"); - - /* Login FIFO DMA */ - scsi_id->login_response = - pci_alloc_consistent(hi->host->pdev, - sizeof(struct sbp2_login_response), - &scsi_id->login_response_dma); - if (!scsi_id->login_response) - goto alloc_fail; - SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); - - /* Query logins ORB DMA */ - scsi_id->query_logins_orb = - pci_alloc_consistent(hi->host->pdev, - sizeof(struct sbp2_query_logins_orb), - &scsi_id->query_logins_orb_dma); - if (!scsi_id->query_logins_orb) - goto alloc_fail; - SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); - - /* Query logins response DMA */ - scsi_id->query_logins_response = - pci_alloc_consistent(hi->host->pdev, - sizeof(struct sbp2_query_logins_response), - &scsi_id->query_logins_response_dma); - if (!scsi_id->query_logins_response) - goto alloc_fail; - SBP2_DMA_ALLOC("consistent DMA region for query logins response"); - - /* Reconnect ORB DMA */ - scsi_id->reconnect_orb = - pci_alloc_consistent(hi->host->pdev, - sizeof(struct sbp2_reconnect_orb), - &scsi_id->reconnect_orb_dma); - if (!scsi_id->reconnect_orb) - goto alloc_fail; - SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); - - /* Logout ORB DMA */ - scsi_id->logout_orb = - pci_alloc_consistent(hi->host->pdev, - sizeof(struct sbp2_logout_orb), - &scsi_id->logout_orb_dma); - if (!scsi_id->logout_orb) - goto alloc_fail; - SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); - - /* Login ORB DMA */ - scsi_id->login_orb = - pci_alloc_consistent(hi->host->pdev, - sizeof(struct sbp2_login_orb), - &scsi_id->login_orb_dma); - if (!scsi_id->login_orb) - goto alloc_fail; - SBP2_DMA_ALLOC("consistent DMA region for login ORB"); - - SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); - - /* - * Create our command orb pool - */ - if (sbp2util_create_command_orb_pool(scsi_id)) { - SBP2_ERR("sbp2util_create_command_orb_pool failed!"); - sbp2_remove_device(scsi_id); - return -ENOMEM; - } - - /* Schedule a timeout here. The reason is that we may be so close - * to a bus reset, that the device is not available for logins. - * This can happen when the bus reset is caused by the host - * connected to the sbp2 device being removed. That host would - * have a certain amount of time to relogin before the sbp2 device - * allows someone else to login instead. One second makes sense. */ - msleep_interruptible(1000); - if (signal_pending(current)) { - SBP2_WARN("aborting sbp2_start_device due to event"); - sbp2_remove_device(scsi_id); - return -EINTR; - } - - /* - * Login to the sbp-2 device - */ - if (sbp2_login_device(scsi_id)) { - /* Login failed, just remove the device. */ - sbp2_remove_device(scsi_id); - return -EBUSY; - } - - /* - * Set max retries to something large on the device - */ - sbp2_set_busy_timeout(scsi_id); - - /* - * Do a SBP-2 fetch agent reset - */ - sbp2_agent_reset(scsi_id, 1); - - /* - * Get the max speed and packet size that we can use - */ - sbp2_max_speed_and_size(scsi_id); - - /* Add this device to the scsi layer now */ - error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); - if (error) { - SBP2_ERR("scsi_add_device failed"); - sbp2_logout_device(scsi_id); - sbp2_remove_device(scsi_id); - return error; - } - - return 0; - -alloc_fail: - SBP2_ERR("Could not allocate memory for scsi_id"); - sbp2_remove_device(scsi_id); - return -ENOMEM; -} - -/* - * This function removes an sbp2 device from the sbp2scsi_host_info struct. - */ -static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) -{ - struct sbp2scsi_host_info *hi; - - SBP2_DEBUG("sbp2_remove_device"); - - if (!scsi_id) - return; - - hi = scsi_id->hi; - - /* This will remove our scsi device aswell */ - if (scsi_id->scsi_host) { - scsi_remove_host(scsi_id->scsi_host); - scsi_host_put(scsi_id->scsi_host); - } - - sbp2util_remove_command_orb_pool(scsi_id); - - list_del(&scsi_id->scsi_list); - - if (scsi_id->login_response) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_login_response), - scsi_id->login_response, - scsi_id->login_response_dma); - SBP2_DMA_FREE("single login FIFO"); - } - - if (scsi_id->login_orb) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_login_orb), - scsi_id->login_orb, - scsi_id->login_orb_dma); - SBP2_DMA_FREE("single login ORB"); - } - - if (scsi_id->reconnect_orb) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_reconnect_orb), - scsi_id->reconnect_orb, - scsi_id->reconnect_orb_dma); - SBP2_DMA_FREE("single reconnect orb"); - } - - if (scsi_id->logout_orb) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_logout_orb), - scsi_id->logout_orb, - scsi_id->logout_orb_dma); - SBP2_DMA_FREE("single logout orb"); - } - - if (scsi_id->query_logins_orb) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_query_logins_orb), - scsi_id->query_logins_orb, - scsi_id->query_logins_orb_dma); - SBP2_DMA_FREE("single query logins orb"); - } - - if (scsi_id->query_logins_response) { - pci_free_consistent(hi->host->pdev, - sizeof(struct sbp2_query_logins_response), - scsi_id->query_logins_response, - scsi_id->query_logins_response_dma); - SBP2_DMA_FREE("single query logins data"); - } - - scsi_id->ud->device.driver_data = NULL; - - SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); - - kfree(scsi_id); -} - -#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA -/* - * This function deals with physical dma write requests (for adapters that do not support - * physical dma in hardware). Mostly just here for debugging... - */ -static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, - int destid, quadlet_t *data, u64 addr, - size_t length, u16 flags) -{ - - /* - * Manually put the data in the right place. - */ - memcpy(bus_to_virt((u32) addr), data, length); - sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", - (u32) addr); - return RCODE_COMPLETE; -} - -/* - * This function deals with physical dma read requests (for adapters that do not support - * physical dma in hardware). Mostly just here for debugging... - */ -static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, - quadlet_t *data, u64 addr, size_t length, - u16 flags) -{ - - /* - * Grab data from memory and send a read response. - */ - memcpy(data, bus_to_virt((u32) addr), length); - sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", - (u32) addr); - return RCODE_COMPLETE; -} -#endif - -/************************************** - * SBP-2 protocol related section - **************************************/ - -/* - * This function queries the device for the maximum concurrent logins it - * supports. - */ -static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) -{ - struct sbp2scsi_host_info *hi = scsi_id->hi; - quadlet_t data[2]; - int max_logins; - int active_logins; - - SBP2_DEBUG("sbp2_query_logins"); - - scsi_id->query_logins_orb->reserved1 = 0x0; - scsi_id->query_logins_orb->reserved2 = 0x0; - - scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; - scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); - SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized"); - - scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); - scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); - scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); - SBP2_DEBUG("sbp2_query_logins: lun_misc initialized"); - - scsi_id->query_logins_orb->reserved_resp_length = - ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); - SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized"); - - scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + - SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); - scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | - SBP2_STATUS_FIFO_ADDRESS_HI); - SBP2_DEBUG("sbp2_query_logins: status FIFO initialized"); - - sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); - - SBP2_DEBUG("sbp2_query_logins: orb byte-swapped"); - - sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), - "sbp2 query logins orb", scsi_id->query_logins_orb_dma); - - memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); - memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); - - SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset"); - - data[0] = ORB_SET_NODE_ID(hi->host->node_id); - data[1] = scsi_id->query_logins_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - - atomic_set(&scsi_id->sbp2_login_complete, 0); - - SBP2_DEBUG("sbp2_query_logins: prepared to write"); - hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); - SBP2_DEBUG("sbp2_query_logins: written"); - - if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) { - SBP2_INFO("Error querying logins to SBP-2 device - timed out"); - return -EIO; - } - - if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { - SBP2_INFO("Error querying logins to SBP-2 device - timed out"); - return -EIO; - } - - if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { - - SBP2_INFO("Error querying logins to SBP-2 device - timed out"); - return -EIO; - } - - sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); - - SBP2_DEBUG("length_max_logins = %x", - (unsigned int)scsi_id->query_logins_response->length_max_logins); - - SBP2_DEBUG("Query logins to SBP-2 device successful"); - - max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); - SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins); - - active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); - SBP2_DEBUG("Number of active logins: %d", active_logins); - - if (active_logins >= max_logins) { - return -EIO; - } - - return 0; -} - -/* - * This function is called in order to login to a particular SBP-2 device, - * after a bus reset. - */ -static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) -{ - struct sbp2scsi_host_info *hi = scsi_id->hi; - quadlet_t data[2]; - - SBP2_DEBUG("sbp2_login_device"); - - if (!scsi_id->login_orb) { - SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!"); - return -EIO; - } - - if (!exclusive_login) { - if (sbp2_query_logins(scsi_id)) { - SBP2_INFO("Device does not support any more concurrent logins"); - return -EIO; - } - } - - /* Set-up login ORB, assume no password */ - scsi_id->login_orb->password_hi = 0; - scsi_id->login_orb->password_lo = 0; - SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized"); - - scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; - scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); - SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized"); - - scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); - scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ - scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ - scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ - scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); - SBP2_DEBUG("sbp2_login_device: lun_misc initialized"); - - scsi_id->login_orb->passwd_resp_lengths = - ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); - SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized"); - - scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + - SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); - scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | - SBP2_STATUS_FIFO_ADDRESS_HI); - SBP2_DEBUG("sbp2_login_device: status FIFO initialized"); - - /* - * Byte swap ORB if necessary - */ - sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); - - SBP2_DEBUG("sbp2_login_device: orb byte-swapped"); - - sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), - "sbp2 login orb", scsi_id->login_orb_dma); - - /* - * Initialize login response and status fifo - */ - memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); - memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); - - SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset"); - - /* - * Ok, let's write to the target's management agent register - */ - data[0] = ORB_SET_NODE_ID(hi->host->node_id); - data[1] = scsi_id->login_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - - atomic_set(&scsi_id->sbp2_login_complete, 0); - - SBP2_DEBUG("sbp2_login_device: prepared to write to %08x", - (unsigned int)scsi_id->sbp2_management_agent_addr); - hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); - SBP2_DEBUG("sbp2_login_device: written"); - - /* - * Wait for login status (up to 20 seconds)... - */ - if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) { - SBP2_ERR("Error logging into SBP-2 device - login timed-out"); - return -EIO; - } - - /* - * Sanity. Make sure status returned matches login orb. - */ - if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { - SBP2_ERR("Error logging into SBP-2 device - login timed-out"); - return -EIO; - } - - /* - * Check status - */ - if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { - - SBP2_ERR("Error logging into SBP-2 device - login failed"); - return -EIO; - } - - /* - * Byte swap the login response, for use when reconnecting or - * logging out. - */ - sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); - - /* - * Grab our command block agent address from the login response. - */ - SBP2_DEBUG("command_block_agent_hi = %x", - (unsigned int)scsi_id->login_response->command_block_agent_hi); - SBP2_DEBUG("command_block_agent_lo = %x", - (unsigned int)scsi_id->login_response->command_block_agent_lo); - - scsi_id->sbp2_command_block_agent_addr = - ((u64)scsi_id->login_response->command_block_agent_hi) << 32; - scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); - scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; - - SBP2_INFO("Logged into SBP-2 device"); - - return 0; - -} - -/* - * This function is called in order to logout from a particular SBP-2 - * device, usually called during driver unload. - */ -static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) -{ - struct sbp2scsi_host_info *hi = scsi_id->hi; - quadlet_t data[2]; - int error; - - SBP2_DEBUG("sbp2_logout_device"); - - /* - * Set-up logout ORB - */ - scsi_id->logout_orb->reserved1 = 0x0; - scsi_id->logout_orb->reserved2 = 0x0; - scsi_id->logout_orb->reserved3 = 0x0; - scsi_id->logout_orb->reserved4 = 0x0; - - scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); - scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); - - /* Notify us when complete */ - scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); - - scsi_id->logout_orb->reserved5 = 0x0; - scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + - SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); - scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | - SBP2_STATUS_FIFO_ADDRESS_HI); - - /* - * Byte swap ORB if necessary - */ - sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); - - sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), - "sbp2 logout orb", scsi_id->logout_orb_dma); - - /* - * Ok, let's write to the target's management agent register - */ - data[0] = ORB_SET_NODE_ID(hi->host->node_id); - data[1] = scsi_id->logout_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - - atomic_set(&scsi_id->sbp2_login_complete, 0); - - error = hpsb_node_write(scsi_id->ne, - scsi_id->sbp2_management_agent_addr, data, 8); - if (error) - return error; - - /* Wait for device to logout...1 second. */ - if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) - return -EIO; - - SBP2_INFO("Logged out of SBP-2 device"); - - return 0; - -} - -/* - * This function is called in order to reconnect to a particular SBP-2 - * device, after a bus reset. - */ -static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) -{ - struct sbp2scsi_host_info *hi = scsi_id->hi; - quadlet_t data[2]; - int error; - - SBP2_DEBUG("sbp2_reconnect_device"); - - /* - * Set-up reconnect ORB - */ - scsi_id->reconnect_orb->reserved1 = 0x0; - scsi_id->reconnect_orb->reserved2 = 0x0; - scsi_id->reconnect_orb->reserved3 = 0x0; - scsi_id->reconnect_orb->reserved4 = 0x0; - - scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); - scsi_id->reconnect_orb->login_ID_misc |= - ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); - - /* Notify us when complete */ - scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); - - scsi_id->reconnect_orb->reserved5 = 0x0; - scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + - SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); - scsi_id->reconnect_orb->status_FIFO_hi = - (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI); - - /* - * Byte swap ORB if necessary - */ - sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); - - sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), - "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); - - /* - * Initialize status fifo - */ - memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); - - /* - * Ok, let's write to the target's management agent register - */ - data[0] = ORB_SET_NODE_ID(hi->host->node_id); - data[1] = scsi_id->reconnect_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - - atomic_set(&scsi_id->sbp2_login_complete, 0); - - error = hpsb_node_write(scsi_id->ne, - scsi_id->sbp2_management_agent_addr, data, 8); - if (error) - return error; - - /* - * Wait for reconnect status (up to 1 second)... - */ - if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) { - SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); - return -EIO; - } - - /* - * Sanity. Make sure status returned matches reconnect orb. - */ - if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { - SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); - return -EIO; - } - - /* - * Check status - */ - if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || - STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { - - SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed"); - return -EIO; - } - - HPSB_DEBUG("Reconnected to SBP-2 device"); - - return 0; - -} - -/* - * This function is called in order to set the busy timeout (number of - * retries to attempt) on the sbp2 device. - */ -static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) -{ - quadlet_t data; - - SBP2_DEBUG("sbp2_set_busy_timeout"); - - /* - * Ok, let's write to the target's busy timeout register - */ - data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); - - if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) { - SBP2_ERR("sbp2_set_busy_timeout error"); - } - - return 0; -} - -/* - * This function is called to parse sbp2 device's config rom unit - * directory. Used to determine things like sbp2 management agent offset, - * and command set used (SCSI or RBC). - */ -static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, - struct unit_directory *ud) -{ - struct csr1212_keyval *kv; - struct csr1212_dentry *dentry; - u64 management_agent_addr; - u32 command_set_spec_id, command_set, unit_characteristics, - firmware_revision, workarounds; - int i; - - SBP2_DEBUG("sbp2_parse_unit_directory"); - - management_agent_addr = 0x0; - command_set_spec_id = 0x0; - command_set = 0x0; - unit_characteristics = 0x0; - firmware_revision = 0x0; - - /* Handle different fields in the unit directory, based on keys */ - csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { - switch (kv->key.id) { - case CSR1212_KV_ID_DEPENDENT_INFO: - if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { - /* Save off the management agent address */ - management_agent_addr = - CSR1212_REGISTER_SPACE_BASE + - (kv->value.csr_offset << 2); - - SBP2_DEBUG("sbp2_management_agent_addr = %x", - (unsigned int)management_agent_addr); - } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { - scsi_id->sbp2_lun = - ORB_SET_LUN(kv->value.immediate); - } - break; - - case SBP2_COMMAND_SET_SPEC_ID_KEY: - /* Command spec organization */ - command_set_spec_id = kv->value.immediate; - SBP2_DEBUG("sbp2_command_set_spec_id = %x", - (unsigned int)command_set_spec_id); - break; - - case SBP2_COMMAND_SET_KEY: - /* Command set used by sbp2 device */ - command_set = kv->value.immediate; - SBP2_DEBUG("sbp2_command_set = %x", - (unsigned int)command_set); - break; - - case SBP2_UNIT_CHARACTERISTICS_KEY: - /* - * Unit characterisitcs (orb related stuff - * that I'm not yet paying attention to) - */ - unit_characteristics = kv->value.immediate; - SBP2_DEBUG("sbp2_unit_characteristics = %x", - (unsigned int)unit_characteristics); - break; - - case SBP2_FIRMWARE_REVISION_KEY: - /* Firmware revision */ - firmware_revision = kv->value.immediate; - if (force_inquiry_hack) - SBP2_INFO("sbp2_firmware_revision = %x", - (unsigned int)firmware_revision); - else - SBP2_DEBUG("sbp2_firmware_revision = %x", - (unsigned int)firmware_revision); - break; - - default: - break; - } - } - - /* This is the start of our broken device checking. We try to hack - * around oddities and known defects. */ - workarounds = 0x0; - - /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a - * bridge with 128KB max transfer size limitation. For sanity, we - * only voice this when the current max_sectors setting - * exceeds the 128k limit. By default, that is not the case. - * - * It would be really nice if we could detect this before the scsi - * host gets initialized. That way we can down-force the - * max_sectors to account for it. That is not currently - * possible. */ - if ((firmware_revision & 0xffff00) == - SBP2_128KB_BROKEN_FIRMWARE && - (max_sectors * 512) > (128*1024)) { - SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.", - NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); - SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!", - max_sectors); - workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER; - } - - /* Check for a blacklisted set of devices that require us to force - * a 36 byte host inquiry. This can be overriden as a module param - * (to force all hosts). */ - for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) { - if ((firmware_revision & 0xffff00) == - sbp2_broken_inquiry_list[i]) { - SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround", - NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); - workarounds |= SBP2_BREAKAGE_INQUIRY_HACK; - break; /* No need to continue. */ - } - } - - /* If this is a logical unit directory entry, process the parent - * to get the values. */ - if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { - struct unit_directory *parent_ud = - container_of(ud->device.parent, struct unit_directory, device); - sbp2_parse_unit_directory(scsi_id, parent_ud); - } else { - scsi_id->sbp2_management_agent_addr = management_agent_addr; - scsi_id->sbp2_command_set_spec_id = command_set_spec_id; - scsi_id->sbp2_command_set = command_set; - scsi_id->sbp2_unit_characteristics = unit_characteristics; - scsi_id->sbp2_firmware_revision = firmware_revision; - scsi_id->workarounds = workarounds; - if (ud->flags & UNIT_DIRECTORY_HAS_LUN) - scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun); - } -} - -/* - * This function is called in order to determine the max speed and packet - * size we can use in our ORBs. Note, that we (the driver and host) only - * initiate the transaction. The SBP-2 device actually transfers the data - * (by reading from the DMA area we tell it). This means that the SBP-2 - * device decides the actual maximum data it can transfer. We just tell it - * the speed that it needs to use, and the max_rec the host supports, and - * it takes care of the rest. - */ -static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) -{ - struct sbp2scsi_host_info *hi = scsi_id->hi; - - SBP2_DEBUG("sbp2_max_speed_and_size"); - - /* Initial setting comes from the hosts speed map */ - scsi_id->speed_code = - hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 + - NODEID_TO_NODE(scsi_id->ne->nodeid)]; - - /* Bump down our speed if the user requested it */ - if (scsi_id->speed_code > max_speed) { - scsi_id->speed_code = max_speed; - SBP2_ERR("Forcing SBP-2 max speed down to %s", - hpsb_speedto_str[scsi_id->speed_code]); - } - - /* Payload size is the lesser of what our speed supports and what - * our host supports. */ - scsi_id->max_payload_size = - min(sbp2_speedto_max_payload[scsi_id->speed_code], - (u8) (hi->host->csr.max_rec - 1)); - - HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", - NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), - hpsb_speedto_str[scsi_id->speed_code], - 1 << ((u32) scsi_id->max_payload_size + 2)); - - return 0; -} - -/* - * This function is called in order to perform a SBP-2 agent reset. - */ -static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) -{ - quadlet_t data; - u64 addr; - int retval; - - SBP2_DEBUG("sbp2_agent_reset"); - - /* - * Ok, let's write to the target's management agent register - */ - data = ntohl(SBP2_AGENT_RESET_DATA); - addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; - - if (wait) - retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); - else - retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); - - if (retval < 0) { - SBP2_ERR("hpsb_node_write failed.\n"); - return -EIO; - } - - /* - * Need to make sure orb pointer is written on next command - */ - scsi_id->last_orb = NULL; - - return 0; -} - -static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, - struct sbp2scsi_host_info *hi, - struct sbp2_command_info *command, - unsigned int scsi_use_sg, - struct scatterlist *sgpnt, - u32 orb_direction, - enum dma_data_direction dma_dir) -{ - command->dma_dir = dma_dir; - orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); - orb->misc |= ORB_SET_DIRECTION(orb_direction); - - /* Special case if only one element (and less than 64KB in size) */ - if ((scsi_use_sg == 1) && - (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { - - SBP2_DEBUG("Only one s/g element"); - command->dma_size = sgpnt[0].length; - command->dma_type = CMD_DMA_PAGE; - command->cmd_dma = pci_map_page(hi->host->pdev, - sgpnt[0].page, - sgpnt[0].offset, - command->dma_size, - command->dma_dir); - SBP2_DMA_ALLOC("single page scatter element"); - - orb->data_descriptor_lo = command->cmd_dma; - orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); - - } else { - struct sbp2_unrestricted_page_table *sg_element = - &command->scatter_gather_element[0]; - u32 sg_count, sg_len; - dma_addr_t sg_addr; - int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, - dma_dir); - - SBP2_DMA_ALLOC("scatter list"); - - command->dma_size = scsi_use_sg; - command->sge_buffer = sgpnt; - - /* use page tables (s/g) */ - orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); - orb->data_descriptor_lo = command->sge_dma; - - /* - * Loop through and fill out our sbp-2 page tables - * (and split up anything too large) - */ - for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { - sg_len = sg_dma_len(sgpnt); - sg_addr = sg_dma_address(sgpnt); - while (sg_len) { - sg_element[sg_count].segment_base_lo = sg_addr; - if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { - sg_element[sg_count].length_segment_base_hi = - PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); - sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; - sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; - } else { - sg_element[sg_count].length_segment_base_hi = - PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); - sg_len = 0; - } - sg_count++; - } - } - - /* Number of page table (s/g) elements */ - orb->misc |= ORB_SET_DATA_SIZE(sg_count); - - sbp2util_packet_dump(sg_element, - (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, - "sbp2 s/g list", command->sge_dma); - - /* Byte swap page tables if necessary */ - sbp2util_cpu_to_be32_buffer(sg_element, - (sizeof(struct sbp2_unrestricted_page_table)) * - sg_count); - } -} - -static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, - struct sbp2scsi_host_info *hi, - struct sbp2_command_info *command, - struct scatterlist *sgpnt, - u32 orb_direction, - unsigned int scsi_request_bufflen, - void *scsi_request_buffer, - enum dma_data_direction dma_dir) -{ - command->dma_dir = dma_dir; - command->dma_size = scsi_request_bufflen; - command->dma_type = CMD_DMA_SINGLE; - command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, - command->dma_size, command->dma_dir); - orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); - orb->misc |= ORB_SET_DIRECTION(orb_direction); - - SBP2_DMA_ALLOC("single bulk"); - - /* - * Handle case where we get a command w/o s/g enabled (but - * check for transfers larger than 64K) - */ - if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { - - orb->data_descriptor_lo = command->cmd_dma; - orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); - - } else { - struct sbp2_unrestricted_page_table *sg_element = - &command->scatter_gather_element[0]; - u32 sg_count, sg_len; - dma_addr_t sg_addr; - - /* - * Need to turn this into page tables, since the - * buffer is too large. - */ - orb->data_descriptor_lo = command->sge_dma; - - /* Use page tables (s/g) */ - orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); - - /* - * fill out our sbp-2 page tables (and split up - * the large buffer) - */ - sg_count = 0; - sg_len = scsi_request_bufflen; - sg_addr = command->cmd_dma; - while (sg_len) { - sg_element[sg_count].segment_base_lo = sg_addr; - if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { - sg_element[sg_count].length_segment_base_hi = - PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); - sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; - sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; - } else { - sg_element[sg_count].length_segment_base_hi = - PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); - sg_len = 0; - } - sg_count++; - } - - /* Number of page table (s/g) elements */ - orb->misc |= ORB_SET_DATA_SIZE(sg_count); - - sbp2util_packet_dump(sg_element, - (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, - "sbp2 s/g list", command->sge_dma); - - /* Byte swap page tables if necessary */ - sbp2util_cpu_to_be32_buffer(sg_element, - (sizeof(struct sbp2_unrestricted_page_table)) * - sg_count); - } -} - -/* - * This function is called to create the actual command orb and s/g list - * out of the scsi command itself. - */ -static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, - struct sbp2_command_info *command, - unchar *scsi_cmd, - unsigned int scsi_use_sg, - unsigned int scsi_request_bufflen, - void *scsi_request_buffer, - enum dma_data_direction dma_dir) -{ - struct sbp2scsi_host_info *hi = scsi_id->hi; - struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; - struct sbp2_command_orb *command_orb = &command->command_orb; - u32 orb_direction; - - /* - * Set-up our command ORB.. - * - * NOTE: We're doing unrestricted page tables (s/g), as this is - * best performance (at least with the devices I have). This means - * that data_size becomes the number of s/g elements, and - * page_size should be zero (for unrestricted). - */ - command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); - command_orb->next_ORB_lo = 0x0; - command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); - command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); - command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ - - if (dma_dir == DMA_NONE) - orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; - else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) - orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; - else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) - orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; - else { - SBP2_WARN("Falling back to DMA_NONE"); - orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; - } - - /* Set-up our pagetable stuff */ - if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { - SBP2_DEBUG("No data transfer"); - command_orb->data_descriptor_hi = 0x0; - command_orb->data_descriptor_lo = 0x0; - command_orb->misc |= ORB_SET_DIRECTION(1); - } else if (scsi_use_sg) { - SBP2_DEBUG("Use scatter/gather"); - sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg, - sgpnt, orb_direction, dma_dir); - } else { - SBP2_DEBUG("No scatter/gather"); - sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt, - orb_direction, scsi_request_bufflen, - scsi_request_buffer, dma_dir); - } - - /* Byte swap command ORB if necessary */ - sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); - - /* Put our scsi command in the command ORB */ - memset(command_orb->cdb, 0, 12); - memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); -} - -/* - * This function is called in order to begin a regular SBP-2 command. - */ -static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, - struct sbp2_command_info *command) -{ - struct sbp2scsi_host_info *hi = scsi_id->hi; - struct sbp2_command_orb *command_orb = &command->command_orb; - struct node_entry *ne = scsi_id->ne; - u64 addr; - - outstanding_orb_incr; - SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", - command_orb, global_outstanding_command_orbs); - - pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, - sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); - pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, - sizeof(command->scatter_gather_element), - PCI_DMA_BIDIRECTIONAL); - /* - * Check to see if there are any previous orbs to use - */ - if (scsi_id->last_orb == NULL) { - quadlet_t data[2]; - - /* - * Ok, let's write to the target's management agent register - */ - addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET; - data[0] = ORB_SET_NODE_ID(hi->host->node_id); - data[1] = command->command_orb_dma; - sbp2util_cpu_to_be32_buffer(data, 8); - - SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb); - - if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) { - SBP2_ERR("sbp2util_node_write_no_wait failed.\n"); - return -EIO; - } - - SBP2_ORB_DEBUG("write command agent complete"); - - scsi_id->last_orb = command_orb; - scsi_id->last_orb_dma = command->command_orb_dma; - - } else { - quadlet_t data; - - /* - * We have an orb already sent (maybe or maybe not - * processed) that we can append this orb to. So do so, - * and ring the doorbell. Have to be very careful - * modifying these next orb pointers, as they are accessed - * both by the sbp2 device and us. - */ - scsi_id->last_orb->next_ORB_lo = - cpu_to_be32(command->command_orb_dma); - /* Tells hardware that this pointer is valid */ - scsi_id->last_orb->next_ORB_hi = 0x0; - pci_dma_sync_single_for_device(hi->host->pdev, - scsi_id->last_orb_dma, - sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); - - /* - * Ring the doorbell - */ - data = cpu_to_be32(command->command_orb_dma); - addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET; - - SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb); - - if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) { - SBP2_ERR("sbp2util_node_write_no_wait failed"); - return -EIO; - } - - scsi_id->last_orb = command_orb; - scsi_id->last_orb_dma = command->command_orb_dma; - - } - return 0; -} - -/* - * This function is called in order to begin a regular SBP-2 command. - */ -static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, - struct scsi_cmnd *SCpnt, - void (*done)(struct scsi_cmnd *)) -{ - unchar *cmd = (unchar *) SCpnt->cmnd; - unsigned int request_bufflen = SCpnt->request_bufflen; - struct sbp2_command_info *command; - - SBP2_DEBUG("sbp2_send_command"); -#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) - printk("[scsi command]\n "); - scsi_print_command(SCpnt); -#endif - SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); - SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); - - /* - * Allocate a command orb and s/g structure - */ - command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); - if (!command) { - return -EIO; - } - - /* - * The scsi stack sends down a request_bufflen which does not match the - * length field in the scsi cdb. This causes some sbp2 devices to - * reject this inquiry command. Fix the request_bufflen. - */ - if (*cmd == INQUIRY) { - if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) - request_bufflen = cmd[4] = 0x24; - else - request_bufflen = cmd[4]; - } - - /* - * Now actually fill in the comamnd orb and sbp2 s/g list - */ - sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, - request_bufflen, SCpnt->request_buffer, - SCpnt->sc_data_direction); - - sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), - "sbp2 command orb", command->command_orb_dma); - - /* - * Initialize status fifo - */ - memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); - - /* - * Link up the orb, and ring the doorbell if needed - */ - sbp2_link_orb_command(scsi_id, command); - - return 0; -} - -/* - * Translates SBP-2 status into SCSI sense data for check conditions - */ -static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) -{ - SBP2_DEBUG("sbp2_status_to_sense_data"); - - /* - * Ok, it's pretty ugly... ;-) - */ - sense_data[0] = 0x70; - sense_data[1] = 0x0; - sense_data[2] = sbp2_status[9]; - sense_data[3] = sbp2_status[12]; - sense_data[4] = sbp2_status[13]; - sense_data[5] = sbp2_status[14]; - sense_data[6] = sbp2_status[15]; - sense_data[7] = 10; - sense_data[8] = sbp2_status[16]; - sense_data[9] = sbp2_status[17]; - sense_data[10] = sbp2_status[18]; - sense_data[11] = sbp2_status[19]; - sense_data[12] = sbp2_status[10]; - sense_data[13] = sbp2_status[11]; - sense_data[14] = sbp2_status[20]; - sense_data[15] = sbp2_status[21]; - - return sbp2_status[8] & 0x3f; /* return scsi status */ -} - -/* - * This function is called after a command is completed, in order to do any necessary SBP-2 - * response data translations for the SCSI stack - */ -static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id, - struct scsi_cmnd *SCpnt) -{ - u8 *scsi_buf = SCpnt->request_buffer; - - SBP2_DEBUG("sbp2_check_sbp2_response"); - - switch (SCpnt->cmnd[0]) { - - case INQUIRY: - /* - * Make sure data length is ok. Minimum length is 36 bytes - */ - if (scsi_buf[4] == 0) { - scsi_buf[4] = 36 - 5; - } - - /* - * Fix ansi revision and response data format - */ - scsi_buf[2] |= 2; - scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; - - break; - - default: - break; - } - return; -} - -/* - * This function deals with status writes from the SBP-2 device - */ -static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid, - quadlet_t *data, u64 addr, size_t length, u16 fl) -{ - struct sbp2scsi_host_info *hi; - struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; - u32 id; - struct scsi_cmnd *SCpnt = NULL; - u32 scsi_status = SBP2_SCSI_STATUS_GOOD; - struct sbp2_command_info *command; - unsigned long flags; - - SBP2_DEBUG("sbp2_handle_status_write"); - - sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); - - if (!host) { - SBP2_ERR("host is NULL - this is bad!"); - return RCODE_ADDRESS_ERROR; - } - - hi = hpsb_get_hostinfo(&sbp2_highlevel, host); - - if (!hi) { - SBP2_ERR("host info is NULL - this is bad!"); - return RCODE_ADDRESS_ERROR; - } - - /* - * Find our scsi_id structure by looking at the status fifo address written to by - * the sbp2 device. - */ - id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS)); - list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { - if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) { - scsi_id = scsi_id_tmp; - break; - } - } - - if (!scsi_id) { - SBP2_ERR("scsi_id is NULL - device is gone?"); - return RCODE_ADDRESS_ERROR; - } - - /* - * Put response into scsi_id status fifo... - */ - memcpy(&scsi_id->status_block, data, length); - - /* - * Byte swap first two quadlets (8 bytes) of status for processing - */ - sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8); - - /* - * Handle command ORB status here if necessary. First, need to match status with command. - */ - command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo); - if (command) { - - SBP2_DEBUG("Found status for command ORB"); - pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, - sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); - pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, - sizeof(command->scatter_gather_element), - PCI_DMA_BIDIRECTIONAL); - - SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); - outstanding_orb_decr; - - /* - * Matched status with command, now grab scsi command pointers and check status - */ - SCpnt = command->Current_SCpnt; - sbp2util_mark_command_completed(scsi_id, command); - - if (SCpnt) { - - /* - * See if the target stored any scsi status information - */ - if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) { - /* - * Translate SBP-2 status to SCSI sense data - */ - SBP2_DEBUG("CHECK CONDITION"); - scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer); - } - - /* - * Check to see if the dead bit is set. If so, we'll have to initiate - * a fetch agent reset. - */ - if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) { - - /* - * Initiate a fetch agent reset. - */ - SBP2_DEBUG("Dead bit set - initiating fetch agent reset"); - sbp2_agent_reset(scsi_id, 0); - } - - SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); - } - - /* - * Check here to see if there are no commands in-use. If there are none, we can - * null out last orb so that next time around we write directly to the orb pointer... - * Quick start saves one 1394 bus transaction. - */ - spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); - if (list_empty(&scsi_id->sbp2_command_orb_inuse)) { - scsi_id->last_orb = NULL; - } - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); - - } else { - - /* - * It's probably a login/logout/reconnect status. - */ - if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) || - (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) || - (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) || - (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) { - atomic_set(&scsi_id->sbp2_login_complete, 1); - } - } - - if (SCpnt) { - - /* Complete the SCSI command. */ - SBP2_DEBUG("Completing SCSI command"); - sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, - command->Current_done); - SBP2_ORB_DEBUG("command orb completed"); - } - - return RCODE_COMPLETE; -} - -/************************************** - * SCSI interface related section - **************************************/ - -/* - * This routine is the main request entry routine for doing I/O. It is - * called from the scsi stack directly. - */ -static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, - void (*done)(struct scsi_cmnd *)) -{ - struct scsi_id_instance_data *scsi_id = - (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; - struct sbp2scsi_host_info *hi; - int result = DID_NO_CONNECT << 16; - - SBP2_DEBUG("sbp2scsi_queuecommand"); - - if (!sbp2util_node_is_available(scsi_id)) - goto done; - - hi = scsi_id->hi; - - if (!hi) { - SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); - goto done; - } - - /* - * Until we handle multiple luns, just return selection time-out - * to any IO directed at non-zero LUNs - */ - if (SCpnt->device->lun) - goto done; - - /* - * Check for request sense command, and handle it here - * (autorequest sense) - */ - if (SCpnt->cmnd[0] == REQUEST_SENSE) { - SBP2_DEBUG("REQUEST_SENSE"); - memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); - memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); - sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); - return 0; - } - - /* - * Check to see if we are in the middle of a bus reset. - */ - if (!hpsb_node_entry_valid(scsi_id->ne)) { - SBP2_ERR("Bus reset in progress - rejecting command"); - result = DID_BUS_BUSY << 16; - goto done; - } - - /* - * Bidirectional commands are not yet implemented, - * and unknown transfer direction not handled. - */ - if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { - SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); - result = DID_ERROR << 16; - goto done; - } - - /* - * Try and send our SCSI command - */ - if (sbp2_send_command(scsi_id, SCpnt, done)) { - SBP2_ERR("Error sending SCSI command"); - sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, - SCpnt, done); - } - return 0; - -done: - SCpnt->result = result; - done(SCpnt); - return 0; -} - -/* - * This function is called in order to complete all outstanding SBP-2 - * commands (in case of resets, etc.). - */ -static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, - u32 status) -{ - struct sbp2scsi_host_info *hi = scsi_id->hi; - struct list_head *lh; - struct sbp2_command_info *command; - unsigned long flags; - - SBP2_DEBUG("sbp2scsi_complete_all_commands"); - - spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); - while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { - SBP2_DEBUG("Found pending command to complete"); - lh = scsi_id->sbp2_command_orb_inuse.next; - command = list_entry(lh, struct sbp2_command_info, list); - pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, - sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); - pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, - sizeof(command->scatter_gather_element), - PCI_DMA_BIDIRECTIONAL); - sbp2util_mark_command_completed(scsi_id, command); - if (command->Current_SCpnt) { - command->Current_SCpnt->result = status << 16; - command->Current_done(command->Current_SCpnt); - } - } - spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); - - return; -} - -/* - * This function is called in order to complete a regular SBP-2 command. - * - * This can be called in interrupt context. - */ -static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, - u32 scsi_status, struct scsi_cmnd *SCpnt, - void (*done)(struct scsi_cmnd *)) -{ - SBP2_DEBUG("sbp2scsi_complete_command"); - - /* - * Sanity - */ - if (!SCpnt) { - SBP2_ERR("SCpnt is NULL"); - return; - } - - /* - * If a bus reset is in progress and there was an error, don't - * complete the command, just let it get retried at the end of the - * bus reset. - */ - if (!hpsb_node_entry_valid(scsi_id->ne) - && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { - SBP2_ERR("Bus reset in progress - retry command later"); - return; - } - - /* - * Switch on scsi status - */ - switch (scsi_status) { - case SBP2_SCSI_STATUS_GOOD: - SCpnt->result = DID_OK; - break; - - case SBP2_SCSI_STATUS_BUSY: - SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); - SCpnt->result = DID_BUS_BUSY << 16; - break; - - case SBP2_SCSI_STATUS_CHECK_CONDITION: - SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); - SCpnt->result = CHECK_CONDITION << 1; - - /* - * Debug stuff - */ -#if CONFIG_IEEE1394_SBP2_DEBUG >= 1 - scsi_print_command(SCpnt); - scsi_print_sense("bh", SCpnt); -#endif - - break; - - case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: - SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); - SCpnt->result = DID_NO_CONNECT << 16; - scsi_print_command(SCpnt); - break; - - case SBP2_SCSI_STATUS_CONDITION_MET: - case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: - case SBP2_SCSI_STATUS_COMMAND_TERMINATED: - SBP2_ERR("Bad SCSI status = %x", scsi_status); - SCpnt->result = DID_ERROR << 16; - scsi_print_command(SCpnt); - break; - - default: - SBP2_ERR("Unsupported SCSI status = %x", scsi_status); - SCpnt->result = DID_ERROR << 16; - } - - /* - * Take care of any sbp2 response data mucking here (RBC stuff, etc.) - */ - if (SCpnt->result == DID_OK) { - sbp2_check_sbp2_response(scsi_id, SCpnt); - } - - /* - * If a bus reset is in progress and there was an error, complete - * the command as busy so that it will get retried. - */ - if (!hpsb_node_entry_valid(scsi_id->ne) - && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { - SBP2_ERR("Completing command with busy (bus reset)"); - SCpnt->result = DID_BUS_BUSY << 16; - } - - /* - * If a unit attention occurs, return busy status so it gets - * retried... it could have happened because of a 1394 bus reset - * or hot-plug... - */ -#if 0 - if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && - (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { - SBP2_DEBUG("UNIT ATTENTION - return busy"); - SCpnt->result = DID_BUS_BUSY << 16; - } -#endif - - /* - * Tell scsi stack that we're done with this command - */ - done(SCpnt); -} - -static int sbp2scsi_slave_alloc(struct scsi_device *sdev) -{ - ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = sdev; - return 0; -} - -static int sbp2scsi_slave_configure(struct scsi_device *sdev) -{ - blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); - sdev->use_10_for_rw = 1; - sdev->use_10_for_ms = 1; - return 0; -} - -static void sbp2scsi_slave_destroy(struct scsi_device *sdev) -{ - ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL; - return; -} - -/* - * Called by scsi stack when something has really gone wrong. Usually - * called when a command has timed-out for some reason. - */ -static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) -{ - struct scsi_id_instance_data *scsi_id = - (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; - struct sbp2scsi_host_info *hi = scsi_id->hi; - struct sbp2_command_info *command; - - SBP2_ERR("aborting sbp2 command"); - scsi_print_command(SCpnt); - - if (sbp2util_node_is_available(scsi_id)) { - - /* - * Right now, just return any matching command structures - * to the free pool. - */ - command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); - if (command) { - SBP2_DEBUG("Found command to abort"); - pci_dma_sync_single_for_cpu(hi->host->pdev, - command->command_orb_dma, - sizeof(struct sbp2_command_orb), - PCI_DMA_BIDIRECTIONAL); - pci_dma_sync_single_for_cpu(hi->host->pdev, - command->sge_dma, - sizeof(command->scatter_gather_element), - PCI_DMA_BIDIRECTIONAL); - sbp2util_mark_command_completed(scsi_id, command); - if (command->Current_SCpnt) { - command->Current_SCpnt->result = DID_ABORT << 16; - command->Current_done(command->Current_SCpnt); - } - } - - /* - * Initiate a fetch agent reset. - */ - sbp2_agent_reset(scsi_id, 0); - sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); - } - - return SUCCESS; -} - -/* - * Called by scsi stack when something has really gone wrong. - */ -static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) -{ - struct scsi_id_instance_data *scsi_id = - (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; - - SBP2_ERR("reset requested"); - - if (sbp2util_node_is_available(scsi_id)) { - SBP2_ERR("Generating sbp2 fetch agent reset"); - sbp2_agent_reset(scsi_id, 0); - } - - return SUCCESS; -} - -static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct scsi_device *sdev; - struct scsi_id_instance_data *scsi_id; - int lun; - - if (!(sdev = to_scsi_device(dev))) - return 0; - - if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) - return 0; - - lun = ORB_SET_LUN(scsi_id->sbp2_lun); - - return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, - scsi_id->ud->id, lun); -} -static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); - -static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { - &dev_attr_ieee1394_id, - NULL -}; - -MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); -MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); -MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); -MODULE_LICENSE("GPL"); - -/* SCSI host template */ -static struct scsi_host_template scsi_driver_template = { - .module = THIS_MODULE, - .name = "SBP-2 IEEE-1394", - .proc_name = SBP2_DEVICE_NAME, - .queuecommand = sbp2scsi_queuecommand, - .eh_abort_handler = sbp2scsi_abort, - .eh_device_reset_handler = sbp2scsi_reset, - .slave_alloc = sbp2scsi_slave_alloc, - .slave_configure = sbp2scsi_slave_configure, - .slave_destroy = sbp2scsi_slave_destroy, - .this_id = -1, - .sg_tablesize = SG_ALL, - .use_clustering = ENABLE_CLUSTERING, - .cmd_per_lun = SBP2_MAX_CMDS, - .can_queue = SBP2_MAX_CMDS, - .emulated = 1, - .sdev_attrs = sbp2_sysfs_sdev_attrs, -}; - -static int sbp2_module_init(void) -{ - int ret; - - SBP2_DEBUG("sbp2_module_init"); - - /* Module load debug option to force one command at a time (serializing I/O) */ - if (serialize_io) { - SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)"); - SBP2_INFO("Try serialize_io=0 for better performance"); - scsi_driver_template.can_queue = 1; - scsi_driver_template.cmd_per_lun = 1; - } - - /* Set max sectors (module load option). Default is 255 sectors. */ - scsi_driver_template.max_sectors = max_sectors; - - /* Register our high level driver with 1394 stack */ - hpsb_register_highlevel(&sbp2_highlevel); - - ret = hpsb_register_protocol(&sbp2_driver); - if (ret) { - SBP2_ERR("Failed to register protocol"); - hpsb_unregister_highlevel(&sbp2_highlevel); - return ret; - } - - return 0; -} - -static void __exit sbp2_module_exit(void) -{ - SBP2_DEBUG("sbp2_module_exit"); - - hpsb_unregister_protocol(&sbp2_driver); - - hpsb_unregister_highlevel(&sbp2_highlevel); -} - -module_init(sbp2_module_init); -module_exit(sbp2_module_exit); |