| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Stefan Richter | 3375 | 48.35% | 81 | 63.28% |
| Kristian Högsberg | 3194 | 45.75% | 19 | 14.84% |
| Chris Boot | 153 | 2.19% | 4 | 3.12% |
| Jarod Wilson | 60 | 0.86% | 4 | 3.12% |
| Tejun Heo | 52 | 0.74% | 1 | 0.78% |
| Jay Fenlason | 49 | 0.70% | 3 | 2.34% |
| FUJITA Tomonori | 24 | 0.34% | 1 | 0.78% |
| Clemens Ladisch | 13 | 0.19% | 3 | 2.34% |
| Jakob Koschel | 13 | 0.19% | 1 | 0.78% |
| Bart Van Assche | 10 | 0.14% | 1 | 0.78% |
| Greg Kroah-Hartman | 9 | 0.13% | 1 | 0.78% |
| James Bottomley | 8 | 0.11% | 1 | 0.78% |
| Olaf Hering | 6 | 0.09% | 1 | 0.78% |
| Christoph Hellwig | 5 | 0.07% | 1 | 0.78% |
| Richard Sharpe | 3 | 0.04% | 1 | 0.78% |
| Andrew Morton | 2 | 0.03% | 1 | 0.78% |
| Thomas Gleixner | 2 | 0.03% | 1 | 0.78% |
| Rusty Russell | 1 | 0.01% | 1 | 0.78% |
| Boaz Harrosh | 1 | 0.01% | 1 | 0.78% |
| Martin K. Petersen | 1 | 0.01% | 1 | 0.78% |
| Total | 6981 | 128 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * SBP2 driver (SCSI over IEEE1394) * * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> */ /* * The basic structure of this driver is based on the old storage driver, * drivers/ieee1394/sbp2.c, originally written by * James Goodwin <jamesg@filanet.com> * with later contributions and ongoing maintenance from * Ben Collins <bcollins@debian.org>, * Stefan Richter <stefanr@s5r6.in-berlin.de> * and many others. */ #include <linux/blkdev.h> #include <linux/bug.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/dma-mapping.h> #include <linux/firewire.h> #include <linux/firewire-constants.h> #include <linux/init.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/kref.h> #include <linux/list.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/scatterlist.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/string.h> #include <linux/stringify.h> #include <linux/workqueue.h> #include <asm/byteorder.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> /* * So far only bridges from Oxford Semiconductor are known to support * concurrent logins. Depending on firmware, four or two concurrent logins * are possible on OXFW911 and newer Oxsemi bridges. * * Concurrent logins are useful together with cluster filesystems. */ static bool sbp2_param_exclusive_login = 1; module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " "(default = Y, use N for concurrent initiators)"); /* * Flags for firmware oddities * * - 128kB max transfer * Limit transfer size. Necessary for some old bridges. * * - 36 byte inquiry * When scsi_mod probes the device, let the inquiry command look like that * from MS Windows. * * - skip mode page 8 * Suppress sending of mode_sense for mode page 8 if the device pretends to * support the SCSI Primary Block commands instead of Reduced Block Commands. * * - fix capacity * Tell sd_mod to correct the last sector number reported by read_capacity. * Avoids access beyond actual disk limits on devices with an off-by-one bug. * Don't use this with devices which don't have this bug. * * - delay inquiry * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. * * - power condition * Set the power condition field in the START STOP UNIT commands sent by * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on). * Some disks need this to spin down or to resume properly. * * - override internal blacklist * Instead of adding to the built-in blacklist, use only the workarounds * specified in the module load parameter. * Useful if a blacklist entry interfered with a non-broken device. */ #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 #define SBP2_WORKAROUND_INQUIRY_36 0x2 #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 #define SBP2_WORKAROUND_DELAY_INQUIRY 0x10 #define SBP2_INQUIRY_DELAY 12 #define SBP2_WORKAROUND_POWER_CONDITION 0x20 #define SBP2_WORKAROUND_OVERRIDE 0x100 static int sbp2_param_workarounds; module_param_named(workarounds, sbp2_param_workarounds, int, 0644); MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) ", set power condition in start stop unit = " __stringify(SBP2_WORKAROUND_POWER_CONDITION) ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) ", or a combination)"); /* * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry * and one struct scsi_device per sbp2_logical_unit. */ struct sbp2_logical_unit { struct sbp2_target *tgt; struct list_head link; struct fw_address_handler address_handler; struct list_head orb_list; u64 command_block_agent_address; u16 lun; int login_id; /* * The generation is updated once we've logged in or reconnected * to the logical unit. Thus, I/O to the device will automatically * fail and get retried if it happens in a window where the device * is not ready, e.g. after a bus reset but before we reconnect. */ int generation; int retries; work_func_t workfn; struct delayed_work work; bool has_sdev; bool blocked; }; static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay) { queue_delayed_work(fw_workqueue, &lu->work, delay); } /* * We create one struct sbp2_target per IEEE 1212 Unit Directory * and one struct Scsi_Host per sbp2_target. */ struct sbp2_target { struct fw_unit *unit; struct list_head lu_list; u64 management_agent_address; u64 guid; int directory_id; int node_id; int address_high; unsigned int workarounds; unsigned int mgt_orb_timeout; unsigned int max_payload; spinlock_t lock; int dont_block; /* counter for each logical unit */ int blocked; /* ditto */ }; static struct fw_device *target_parent_device(struct sbp2_target *tgt) { return fw_parent_device(tgt->unit); } static const struct device *tgt_dev(const struct sbp2_target *tgt) { return &tgt->unit->device; } static const struct device *lu_dev(const struct sbp2_logical_unit *lu) { return &lu->tgt->unit->device; } /* Impossible login_id, to detect logout attempt before successful login */ #define INVALID_LOGIN_ID 0x10000 #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ #define SBP2_ORB_NULL 0x80000000 #define SBP2_RETRY_LIMIT 0xf /* 15 retries */ #define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */ /* * There is no transport protocol limit to the CDB length, but we implement * a fixed length only. 16 bytes is enough for disks larger than 2 TB. */ #define SBP2_MAX_CDB_SIZE 16 /* * The maximum SBP-2 data buffer size is 0xffff. We quadlet-align this * for compatibility with earlier versions of this driver. */ #define SBP2_MAX_SEG_SIZE 0xfffc /* Unit directory keys */ #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a #define SBP2_CSR_FIRMWARE_REVISION 0x3c #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 #define SBP2_CSR_UNIT_UNIQUE_ID 0x8d #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 /* Management orb opcodes */ #define SBP2_LOGIN_REQUEST 0x0 #define SBP2_QUERY_LOGINS_REQUEST 0x1 #define SBP2_RECONNECT_REQUEST 0x3 #define SBP2_SET_PASSWORD_REQUEST 0x4 #define SBP2_LOGOUT_REQUEST 0x7 #define SBP2_ABORT_TASK_REQUEST 0xb #define SBP2_ABORT_TASK_SET 0xc #define SBP2_LOGICAL_UNIT_RESET 0xe #define SBP2_TARGET_RESET_REQUEST 0xf /* Offsets for command block agent registers */ #define SBP2_AGENT_STATE 0x00 #define SBP2_AGENT_RESET 0x04 #define SBP2_ORB_POINTER 0x08 #define SBP2_DOORBELL 0x10 #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 /* Status write response codes */ #define SBP2_STATUS_REQUEST_COMPLETE 0x0 #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) #define STATUS_GET_ORB_LOW(v) ((v).orb_low) #define STATUS_GET_DATA(v) ((v).data) struct sbp2_status { u32 status; u32 orb_low; u8 data[24]; }; struct sbp2_pointer { __be32 high; __be32 low; }; struct sbp2_orb { struct fw_transaction t; struct kref kref; dma_addr_t request_bus; int rcode; void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); struct sbp2_logical_unit *lu; struct list_head link; }; #define MANAGEMENT_ORB_LUN(v) ((v)) #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) #define MANAGEMENT_ORB_NOTIFY ((1) << 31) #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) struct sbp2_management_orb { struct sbp2_orb base; struct { struct sbp2_pointer password; struct sbp2_pointer response; __be32 misc; __be32 length; struct sbp2_pointer status_fifo; } request; __be32 response[4]; dma_addr_t response_bus; struct completion done; struct sbp2_status status; }; struct sbp2_login_response { __be32 misc; struct sbp2_pointer command_block_agent; __be32 reconnect_hold; }; #define COMMAND_ORB_DATA_SIZE(v) ((v)) #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) #define COMMAND_ORB_SPEED(v) ((v) << 24) #define COMMAND_ORB_DIRECTION ((1) << 27) #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) #define COMMAND_ORB_NOTIFY ((1) << 31) struct sbp2_command_orb { struct sbp2_orb base; struct { struct sbp2_pointer next; struct sbp2_pointer data_descriptor; __be32 misc; u8 command_block[SBP2_MAX_CDB_SIZE]; } request; struct scsi_cmnd *cmd; struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); dma_addr_t page_table_bus; }; #define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */ #define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */ /* * List of devices with known bugs. * * The firmware_revision field, masked with 0xffff00, is the best * indicator for the type of bridge chip of a device. It yields a few * false positives but this did not break correctly behaving devices * so far. */ static const struct { u32 firmware_revision; u32 model; unsigned int workarounds; } sbp2_workarounds_table[] = { /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { .firmware_revision = 0x002800, .model = 0x001010, .workarounds = SBP2_WORKAROUND_INQUIRY_36 | SBP2_WORKAROUND_MODE_SENSE_8 | SBP2_WORKAROUND_POWER_CONDITION, }, /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { .firmware_revision = 0x002800, .model = 0x000000, .workarounds = SBP2_WORKAROUND_POWER_CONDITION, }, /* Initio bridges, actually only needed for some older ones */ { .firmware_revision = 0x000200, .model = SBP2_ROM_VALUE_WILDCARD, .workarounds = SBP2_WORKAROUND_INQUIRY_36, }, /* PL-3507 bridge with Prolific firmware */ { .firmware_revision = 0x012800, .model = SBP2_ROM_VALUE_WILDCARD, .workarounds = SBP2_WORKAROUND_POWER_CONDITION, }, /* Symbios bridge */ { .firmware_revision = 0xa0b800, .model = SBP2_ROM_VALUE_WILDCARD, .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, }, /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { .firmware_revision = 0x002600, .model = SBP2_ROM_VALUE_WILDCARD, .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, }, /* * iPod 2nd generation: needs 128k max transfer size workaround * iPod 3rd generation: needs fix capacity workaround */ { .firmware_revision = 0x0a2700, .model = 0x000000, .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS | SBP2_WORKAROUND_FIX_CAPACITY, }, /* iPod 4th generation */ { .firmware_revision = 0x0a2700, .model = 0x000021, .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, }, /* iPod mini */ { .firmware_revision = 0x0a2700, .model = 0x000022, .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, }, /* iPod mini */ { .firmware_revision = 0x0a2700, .model = 0x000023, .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, }, /* iPod Photo */ { .firmware_revision = 0x0a2700, .model = 0x00007e, .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, } }; static void free_orb(struct kref *kref) { struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); kfree(orb); } static void sbp2_status_write(struct fw_card *card, struct fw_request *request, int tcode, int destination, int source, int generation, unsigned long long offset, void *payload, size_t length, void *callback_data) { struct sbp2_logical_unit *lu = callback_data; struct sbp2_orb *orb = NULL, *iter; struct sbp2_status status; unsigned long flags; if (tcode != TCODE_WRITE_BLOCK_REQUEST || length < 8 || length > sizeof(status)) { fw_send_response(card, request, RCODE_TYPE_ERROR); return; } status.status = be32_to_cpup(payload); status.orb_low = be32_to_cpup(payload + 4); memset(status.data, 0, sizeof(status.data)); if (length > 8) memcpy(status.data, payload + 8, length - 8); if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { dev_notice(lu_dev(lu), "non-ORB related status write, not handled\n"); fw_send_response(card, request, RCODE_COMPLETE); return; } /* Lookup the orb corresponding to this status write. */ spin_lock_irqsave(&lu->tgt->lock, flags); list_for_each_entry(iter, &lu->orb_list, link) { if (STATUS_GET_ORB_HIGH(status) == 0 && STATUS_GET_ORB_LOW(status) == iter->request_bus) { iter->rcode = RCODE_COMPLETE; list_del(&iter->link); orb = iter; break; } } spin_unlock_irqrestore(&lu->tgt->lock, flags); if (orb) { orb->callback(orb, &status); kref_put(&orb->kref, free_orb); /* orb callback reference */ } else { dev_err(lu_dev(lu), "status write for unknown ORB\n"); } fw_send_response(card, request, RCODE_COMPLETE); } static void complete_transaction(struct fw_card *card, int rcode, void *payload, size_t length, void *data) { struct sbp2_orb *orb = data; unsigned long flags; /* * This is a little tricky. We can get the status write for * the orb before we get this callback. The status write * handler above will assume the orb pointer transaction was * successful and set the rcode to RCODE_COMPLETE for the orb. * So this callback only sets the rcode if it hasn't already * been set and only does the cleanup if the transaction * failed and we didn't already get a status write. */ spin_lock_irqsave(&orb->lu->tgt->lock, flags); if (orb->rcode == -1) orb->rcode = rcode; if (orb->rcode != RCODE_COMPLETE) { list_del(&orb->link); spin_unlock_irqrestore(&orb->lu->tgt->lock, flags); orb->callback(orb, NULL); kref_put(&orb->kref, free_orb); /* orb callback reference */ } else { spin_unlock_irqrestore(&orb->lu->tgt->lock, flags); } kref_put(&orb->kref, free_orb); /* transaction callback reference */ } static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, int node_id, int generation, u64 offset) { struct fw_device *device = target_parent_device(lu->tgt); struct sbp2_pointer orb_pointer; unsigned long flags; orb_pointer.high = 0; orb_pointer.low = cpu_to_be32(orb->request_bus); orb->lu = lu; spin_lock_irqsave(&lu->tgt->lock, flags); list_add_tail(&orb->link, &lu->orb_list); spin_unlock_irqrestore(&lu->tgt->lock, flags); kref_get(&orb->kref); /* transaction callback reference */ kref_get(&orb->kref); /* orb callback reference */ fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, node_id, generation, device->max_speed, offset, &orb_pointer, 8, complete_transaction, orb); } static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) { struct fw_device *device = target_parent_device(lu->tgt); struct sbp2_orb *orb, *next; struct list_head list; int retval = -ENOENT; INIT_LIST_HEAD(&list); spin_lock_irq(&lu->tgt->lock); list_splice_init(&lu->orb_list, &list); spin_unlock_irq(&lu->tgt->lock); list_for_each_entry_safe(orb, next, &list, link) { retval = 0; if (fw_cancel_transaction(device->card, &orb->t) == 0) continue; orb->rcode = RCODE_CANCELLED; orb->callback(orb, NULL); kref_put(&orb->kref, free_orb); /* orb callback reference */ } return retval; } static void complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) { struct sbp2_management_orb *orb = container_of(base_orb, struct sbp2_management_orb, base); if (status) memcpy(&orb->status, status, sizeof(*status)); complete(&orb->done); } static int sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, int generation, int function, int lun_or_login_id, void *response) { struct fw_device *device = target_parent_device(lu->tgt); struct sbp2_management_orb *orb; unsigned int timeout; int retval = -ENOMEM; if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device)) return 0; orb = kzalloc(sizeof(*orb), GFP_NOIO); if (orb == NULL) return -ENOMEM; kref_init(&orb->base.kref); orb->response_bus = dma_map_single(device->card->device, &orb->response, sizeof(orb->response), DMA_FROM_DEVICE); if (dma_mapping_error(device->card->device, orb->response_bus)) goto fail_mapping_response; orb->request.response.high = 0; orb->request.response.low = cpu_to_be32(orb->response_bus); orb->request.misc = cpu_to_be32( MANAGEMENT_ORB_NOTIFY | MANAGEMENT_ORB_FUNCTION(function) | MANAGEMENT_ORB_LUN(lun_or_login_id)); orb->request.length = cpu_to_be32( MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response))); orb->request.status_fifo.high = cpu_to_be32(lu->address_handler.offset >> 32); orb->request.status_fifo.low = cpu_to_be32(lu->address_handler.offset); if (function == SBP2_LOGIN_REQUEST) { /* Ask for 2^2 == 4 seconds reconnect grace period */ orb->request.misc |= cpu_to_be32( MANAGEMENT_ORB_RECONNECT(2) | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login)); timeout = lu->tgt->mgt_orb_timeout; } else { timeout = SBP2_ORB_TIMEOUT; } init_completion(&orb->done); orb->base.callback = complete_management_orb; orb->base.request_bus = dma_map_single(device->card->device, &orb->request, sizeof(orb->request), DMA_TO_DEVICE); if (dma_mapping_error(device->card->device, orb->base.request_bus)) goto fail_mapping_request; sbp2_send_orb(&orb->base, lu, node_id, generation, lu->tgt->management_agent_address); wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout)); retval = -EIO; if (sbp2_cancel_orbs(lu) == 0) { dev_err(lu_dev(lu), "ORB reply timed out, rcode 0x%02x\n", orb->base.rcode); goto out; } if (orb->base.rcode != RCODE_COMPLETE) { dev_err(lu_dev(lu), "management write failed, rcode 0x%02x\n", orb->base.rcode); goto out; } if (STATUS_GET_RESPONSE(orb->status) != 0 || STATUS_GET_SBP_STATUS(orb->status) != 0) { dev_err(lu_dev(lu), "error status: %d:%d\n", STATUS_GET_RESPONSE(orb->status), STATUS_GET_SBP_STATUS(orb->status)); goto out; } retval = 0; out: dma_unmap_single(device->card->device, orb->base.request_bus, sizeof(orb->request), DMA_TO_DEVICE); fail_mapping_request: dma_unmap_single(device->card->device, orb->response_bus, sizeof(orb->response), DMA_FROM_DEVICE); fail_mapping_response: if (response) memcpy(response, orb->response, sizeof(orb->response)); kref_put(&orb->base.kref, free_orb); return retval; } static void sbp2_agent_reset(struct sbp2_logical_unit *lu) { struct fw_device *device = target_parent_device(lu->tgt); __be32 d = 0; fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, lu->tgt->node_id, lu->generation, device->max_speed, lu->command_block_agent_address + SBP2_AGENT_RESET, &d, 4); } static void complete_agent_reset_write_no_wait(struct fw_card *card, int rcode, void *payload, size_t length, void *data) { kfree(data); } static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu) { struct fw_device *device = target_parent_device(lu->tgt); struct fw_transaction *t; static __be32 d; t = kmalloc(sizeof(*t), GFP_ATOMIC); if (t == NULL) return; fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, lu->tgt->node_id, lu->generation, device->max_speed, lu->command_block_agent_address + SBP2_AGENT_RESET, &d, 4, complete_agent_reset_write_no_wait, t); } static inline void sbp2_allow_block(struct sbp2_target *tgt) { spin_lock_irq(&tgt->lock); --tgt->dont_block; spin_unlock_irq(&tgt->lock); } /* * Blocks lu->tgt if all of the following conditions are met: * - Login, INQUIRY, and high-level SCSI setup of all of the target's * logical units have been finished (indicated by dont_block == 0). * - lu->generation is stale. * * Note, scsi_block_requests() must be called while holding tgt->lock, * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to * unblock the target. */ static void sbp2_conditionally_block(struct sbp2_logical_unit *lu) { struct sbp2_target *tgt = lu->tgt; struct fw_card *card = target_parent_device(tgt)->card; struct Scsi_Host *shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); unsigned long flags; spin_lock_irqsave(&tgt->lock, flags); if (!tgt->dont_block && !lu->blocked && lu->generation != card->generation) { lu->blocked = true; if (++tgt->blocked == 1) scsi_block_requests(shost); } spin_unlock_irqrestore(&tgt->lock, flags); } /* * Unblocks lu->tgt as soon as all its logical units can be unblocked. * Note, it is harmless to run scsi_unblock_requests() outside the * tgt->lock protected section. On the other hand, running it inside * the section might clash with shost->host_lock. */ static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu) { struct sbp2_target *tgt = lu->tgt; struct fw_card *card = target_parent_device(tgt)->card; struct Scsi_Host *shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); bool unblock = false; spin_lock_irq(&tgt->lock); if (lu->blocked && lu->generation == card->generation) { lu->blocked = false; unblock = --tgt->blocked == 0; } spin_unlock_irq(&tgt->lock); if (unblock) scsi_unblock_requests(shost); } /* * Prevents future blocking of tgt and unblocks it. * Note, it is harmless to run scsi_unblock_requests() outside the * tgt->lock protected section. On the other hand, running it inside * the section might clash with shost->host_lock. */ static void sbp2_unblock(struct sbp2_target *tgt) { struct Scsi_Host *shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); spin_lock_irq(&tgt->lock); ++tgt->dont_block; spin_unlock_irq(&tgt->lock); scsi_unblock_requests(shost); } static int sbp2_lun2int(u16 lun) { struct scsi_lun eight_bytes_lun; memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff; eight_bytes_lun.scsi_lun[1] = lun & 0xff; return scsilun_to_int(&eight_bytes_lun); } /* * Write retransmit retry values into the BUSY_TIMEOUT register. * - The single-phase retry protocol is supported by all SBP-2 devices, but the * default retry_limit value is 0 (i.e. never retry transmission). We write a * saner value after logging into the device. * - The dual-phase retry protocol is optional to implement, and if not * supported, writes to the dual-phase portion of the register will be * ignored. We try to write the original 1394-1995 default here. * - In the case of devices that are also SBP-3-compliant, all writes are * ignored, as the register is read-only, but contains single-phase retry of * 15, which is what we're trying to set for all SBP-2 device anyway, so this * write attempt is safe and yields more consistent behavior for all devices. * * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec, * and section 6.4 of the SBP-3 spec for further details. */ static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu) { struct fw_device *device = target_parent_device(lu->tgt); __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT); fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST, lu->tgt->node_id, lu->generation, device->max_speed, CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, &d, 4); } static void sbp2_reconnect(struct work_struct *work); static void sbp2_login(struct work_struct *work) { struct sbp2_logical_unit *lu = container_of(work, struct sbp2_logical_unit, work.work); struct sbp2_target *tgt = lu->tgt; struct fw_device *device = target_parent_device(tgt); struct Scsi_Host *shost; struct scsi_device *sdev; struct sbp2_login_response response; int generation, node_id, local_node_id; if (fw_device_is_shutdown(device)) return; generation = device->generation; smp_rmb(); /* node IDs must not be older than generation */ node_id = device->node_id; local_node_id = device->card->node_id; /* If this is a re-login attempt, log out, or we might be rejected. */ if (lu->has_sdev) sbp2_send_management_orb(lu, device->node_id, generation, SBP2_LOGOUT_REQUEST, lu->login_id, NULL); if (sbp2_send_management_orb(lu, node_id, generation, SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { if (lu->retries++ < 5) { sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); } else { dev_err(tgt_dev(tgt), "failed to login to LUN %04x\n", lu->lun); /* Let any waiting I/O fail from now on. */ sbp2_unblock(lu->tgt); } return; } tgt->node_id = node_id; tgt->address_high = local_node_id << 16; smp_wmb(); /* node IDs must not be older than generation */ lu->generation = generation; lu->command_block_agent_address = ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff) << 32) | be32_to_cpu(response.command_block_agent.low); lu->login_id = be32_to_cpu(response.misc) & 0xffff; dev_notice(tgt_dev(tgt), "logged in to LUN %04x (%d retries)\n", lu->lun, lu->retries); /* set appropriate retry limit(s) in BUSY_TIMEOUT register */ sbp2_set_busy_timeout(lu); lu->workfn = sbp2_reconnect; sbp2_agent_reset(lu); /* This was a re-login. */ if (lu->has_sdev) { sbp2_cancel_orbs(lu); sbp2_conditionally_unblock(lu); return; } if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) ssleep(SBP2_INQUIRY_DELAY); shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu); /* * FIXME: We are unable to perform reconnects while in sbp2_login(). * Therefore __scsi_add_device() will get into trouble if a bus reset * happens in parallel. It will either fail or leave us with an * unusable sdev. As a workaround we check for this and retry the * whole login and SCSI probing. */ /* Reported error during __scsi_add_device() */ if (IS_ERR(sdev)) goto out_logout_login; /* Unreported error during __scsi_add_device() */ smp_rmb(); /* get current card generation */ if (generation != device->card->generation) { scsi_remove_device(sdev); scsi_device_put(sdev); goto out_logout_login; } /* No error during __scsi_add_device() */ lu->has_sdev = true; scsi_device_put(sdev); sbp2_allow_block(tgt); return; out_logout_login: smp_rmb(); /* generation may have changed */ generation = device->generation; smp_rmb(); /* node_id must not be older than generation */ sbp2_send_management_orb(lu, device->node_id, generation, SBP2_LOGOUT_REQUEST, lu->login_id, NULL); /* * If a bus reset happened, sbp2_update will have requeued * lu->work already. Reset the work from reconnect to login. */ lu->workfn = sbp2_login; } static void sbp2_reconnect(struct work_struct *work) { struct sbp2_logical_unit *lu = container_of(work, struct sbp2_logical_unit, work.work); struct sbp2_target *tgt = lu->tgt; struct fw_device *device = target_parent_device(tgt); int generation, node_id, local_node_id; if (fw_device_is_shutdown(device)) return; generation = device->generation; smp_rmb(); /* node IDs must not be older than generation */ node_id = device->node_id; local_node_id = device->card->node_id; if (sbp2_send_management_orb(lu, node_id, generation, SBP2_RECONNECT_REQUEST, lu->login_id, NULL) < 0) { /* * If reconnect was impossible even though we are in the * current generation, fall back and try to log in again. * * We could check for "Function rejected" status, but * looking at the bus generation as simpler and more general. */ smp_rmb(); /* get current card generation */ if (generation == device->card->generation || lu->retries++ >= 5) { dev_err(tgt_dev(tgt), "failed to reconnect\n"); lu->retries = 0; lu->workfn = sbp2_login; } sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); return; } tgt->node_id = node_id; tgt->address_high = local_node_id << 16; smp_wmb(); /* node IDs must not be older than generation */ lu->generation = generation; dev_notice(tgt_dev(tgt), "reconnected to LUN %04x (%d retries)\n", lu->lun, lu->retries); sbp2_agent_reset(lu); sbp2_cancel_orbs(lu); sbp2_conditionally_unblock(lu); } static void sbp2_lu_workfn(struct work_struct *work) { struct sbp2_logical_unit *lu = container_of(to_delayed_work(work), struct sbp2_logical_unit, work); lu->workfn(work); } static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) { struct sbp2_logical_unit *lu; lu = kmalloc(sizeof(*lu), GFP_KERNEL); if (!lu) return -ENOMEM; lu->address_handler.length = 0x100; lu->address_handler.address_callback = sbp2_status_write; lu->address_handler.callback_data = lu; if (fw_core_add_address_handler(&lu->address_handler, &fw_high_memory_region) < 0) { kfree(lu); return -ENOMEM; } lu->tgt = tgt; lu->lun = lun_entry & 0xffff; lu->login_id = INVALID_LOGIN_ID; lu->retries = 0; lu->has_sdev = false; lu->blocked = false; ++tgt->dont_block; INIT_LIST_HEAD(&lu->orb_list); lu->workfn = sbp2_login; INIT_DELAYED_WORK(&lu->work, sbp2_lu_workfn); list_add_tail(&lu->link, &tgt->lu_list); return 0; } static void sbp2_get_unit_unique_id(struct sbp2_target *tgt, const u32 *leaf) { if ((leaf[0] & 0xffff0000) == 0x00020000) tgt->guid = (u64)leaf[1] << 32 | leaf[2]; } static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, const u32 *directory) { struct fw_csr_iterator ci; int key, value; fw_csr_iterator_init(&ci, directory); while (fw_csr_iterator_next(&ci, &key, &value)) if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && sbp2_add_logical_unit(tgt, value) < 0) return -ENOMEM; return 0; } static int sbp2_scan_unit_dir(struct sbp2_target *tgt, const u32 *directory, u32 *model, u32 *firmware_revision) { struct fw_csr_iterator ci; int key, value; fw_csr_iterator_init(&ci, directory); while (fw_csr_iterator_next(&ci, &key, &value)) { switch (key) { case CSR_DEPENDENT_INFO | CSR_OFFSET: tgt->management_agent_address = CSR_REGISTER_BASE + 4 * value; break; case CSR_DIRECTORY_ID: tgt->directory_id = value; break; case CSR_MODEL: *model = value; break; case SBP2_CSR_FIRMWARE_REVISION: *firmware_revision = value; break; case SBP2_CSR_UNIT_CHARACTERISTICS: /* the timeout value is stored in 500ms units */ tgt->mgt_orb_timeout = (value >> 8 & 0xff) * 500; break; case SBP2_CSR_LOGICAL_UNIT_NUMBER: if (sbp2_add_logical_unit(tgt, value) < 0) return -ENOMEM; break; case SBP2_CSR_UNIT_UNIQUE_ID: sbp2_get_unit_unique_id(tgt, ci.p - 1 + value); break; case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: /* Adjust for the increment in the iterator */ if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0) return -ENOMEM; break; } } return 0; } /* * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be * provided in the config rom. Most devices do provide a value, which * we'll use for login management orbs, but with some sane limits. */ static void sbp2_clamp_management_orb_timeout(struct sbp2_target *tgt) { unsigned int timeout = tgt->mgt_orb_timeout; if (timeout > 40000) dev_notice(tgt_dev(tgt), "%ds mgt_ORB_timeout limited to 40s\n", timeout / 1000); tgt->mgt_orb_timeout = clamp_val(timeout, 5000, 40000); } static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, u32 firmware_revision) { int i; unsigned int w = sbp2_param_workarounds; if (w) dev_notice(tgt_dev(tgt), "Please notify linux1394-devel@lists.sf.net " "if you need the workarounds parameter\n"); if (w & SBP2_WORKAROUND_OVERRIDE) goto out; for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { if (sbp2_workarounds_table[i].firmware_revision != (firmware_revision & 0xffffff00)) continue; if (sbp2_workarounds_table[i].model != model && sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD) continue; w |= sbp2_workarounds_table[i].workarounds; break; } out: if (w) dev_notice(tgt_dev(tgt), "workarounds 0x%x " "(firmware_revision 0x%06x, model_id 0x%06x)\n", w, firmware_revision, model); tgt->workarounds = w; } static struct scsi_host_template scsi_driver_template; static void sbp2_remove(struct fw_unit *unit); static int sbp2_probe(struct fw_unit *unit, const struct ieee1394_device_id *id) { struct fw_device *device = fw_parent_device(unit); struct sbp2_target *tgt; struct sbp2_logical_unit *lu; struct Scsi_Host *shost; u32 model, firmware_revision; /* cannot (or should not) handle targets on the local node */ if (device->is_local) return -ENODEV; shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); if (shost == NULL) return -ENOMEM; tgt = (struct sbp2_target *)shost->hostdata; dev_set_drvdata(&unit->device, tgt); tgt->unit = unit; INIT_LIST_HEAD(&tgt->lu_list); spin_lock_init(&tgt->lock); tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4]; if (fw_device_enable_phys_dma(device) < 0) goto fail_shost_put; shost->max_cmd_len = SBP2_MAX_CDB_SIZE; if (scsi_add_host_with_dma(shost, &unit->device, device->card->device) < 0) goto fail_shost_put; /* implicit directory ID */ tgt->directory_id = ((unit->directory - device->config_rom) * 4 + CSR_CONFIG_ROM) & 0xffffff; firmware_revision = SBP2_ROM_VALUE_MISSING; model = SBP2_ROM_VALUE_MISSING; if (sbp2_scan_unit_dir(tgt, unit->directory, &model, &firmware_revision) < 0) goto fail_remove; sbp2_clamp_management_orb_timeout(tgt); sbp2_init_workarounds(tgt, model, firmware_revision); /* * At S100 we can do 512 bytes per packet, at S200 1024 bytes, * and so on up to 4096 bytes. The SBP-2 max_payload field * specifies the max payload size as 2 ^ (max_payload + 2), so * if we set this to max_speed + 7, we get the right value. */ tgt->max_payload = min3(device->max_speed + 7, 10U, device->card->max_receive - 1); /* Do the login in a workqueue so we can easily reschedule retries. */ list_for_each_entry(lu, &tgt->lu_list, link) sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); return 0; fail_remove: sbp2_remove(unit); return -ENOMEM; fail_shost_put: scsi_host_put(shost); return -ENOMEM; } static void sbp2_update(struct fw_unit *unit) { struct sbp2_target *tgt = dev_get_drvdata(&unit->device); struct sbp2_logical_unit *lu; fw_device_enable_phys_dma(fw_parent_device(unit)); /* * Fw-core serializes sbp2_update() against sbp2_remove(). * Iteration over tgt->lu_list is therefore safe here. */ list_for_each_entry(lu, &tgt->lu_list, link) { sbp2_conditionally_block(lu); lu->retries = 0; sbp2_queue_work(lu, 0); } } static void sbp2_remove(struct fw_unit *unit) { struct fw_device *device = fw_parent_device(unit); struct sbp2_target *tgt = dev_get_drvdata(&unit->device); struct sbp2_logical_unit *lu, *next; struct Scsi_Host *shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); struct scsi_device *sdev; /* prevent deadlocks */ sbp2_unblock(tgt); list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { cancel_delayed_work_sync(&lu->work); sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun)); if (sdev) { scsi_remove_device(sdev); scsi_device_put(sdev); } if (lu->login_id != INVALID_LOGIN_ID) { int generation, node_id; /* * tgt->node_id may be obsolete here if we failed * during initial login or after a bus reset where * the topology changed. */ generation = device->generation; smp_rmb(); /* node_id vs. generation */ node_id = device->node_id; sbp2_send_management_orb(lu, node_id, generation, SBP2_LOGOUT_REQUEST, lu->login_id, NULL); } fw_core_remove_address_handler(&lu->address_handler); list_del(&lu->link); kfree(lu); } scsi_remove_host(shost); dev_notice(&unit->device, "released target %d:0:0\n", shost->host_no); scsi_host_put(shost); } #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e #define SBP2_SW_VERSION_ENTRY 0x00010483 static const struct ieee1394_device_id sbp2_id_table[] = { { .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, .version = SBP2_SW_VERSION_ENTRY, }, { } }; static struct fw_driver sbp2_driver = { .driver = { .owner = THIS_MODULE, .name = KBUILD_MODNAME, .bus = &fw_bus_type, }, .probe = sbp2_probe, .update = sbp2_update, .remove = sbp2_remove, .id_table = sbp2_id_table, }; static void sbp2_unmap_scatterlist(struct device *card_device, struct sbp2_command_orb *orb) { scsi_dma_unmap(orb->cmd); if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT)) dma_unmap_single(card_device, orb->page_table_bus, sizeof(orb->page_table), DMA_TO_DEVICE); } static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) { int sam_status; int sfmt = (sbp2_status[0] >> 6) & 0x03; if (sfmt == 2 || sfmt == 3) { /* * Reserved for future standardization (2) or * Status block format vendor-dependent (3) */ return DID_ERROR << 16; } sense_data[0] = 0x70 | sfmt | (sbp2_status[1] & 0x80); sense_data[1] = 0x0; sense_data[2] = ((sbp2_status[1] << 1) & 0xe0) | (sbp2_status[1] & 0x0f); sense_data[3] = sbp2_status[4]; sense_data[4] = sbp2_status[5]; sense_data[5] = sbp2_status[6]; sense_data[6] = sbp2_status[7]; sense_data[7] = 10; sense_data[8] = sbp2_status[8]; sense_data[9] = sbp2_status[9]; sense_data[10] = sbp2_status[10]; sense_data[11] = sbp2_status[11]; sense_data[12] = sbp2_status[2]; sense_data[13] = sbp2_status[3]; sense_data[14] = sbp2_status[12]; sense_data[15] = sbp2_status[13]; sam_status = sbp2_status[0] & 0x3f; switch (sam_status) { case SAM_STAT_GOOD: case SAM_STAT_CHECK_CONDITION: case SAM_STAT_CONDITION_MET: case SAM_STAT_BUSY: case SAM_STAT_RESERVATION_CONFLICT: case SAM_STAT_COMMAND_TERMINATED: return DID_OK << 16 | sam_status; default: return DID_ERROR << 16; } } static void complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) { struct sbp2_command_orb *orb = container_of(base_orb, struct sbp2_command_orb, base); struct fw_device *device = target_parent_device(base_orb->lu->tgt); int result; if (status != NULL) { if (STATUS_GET_DEAD(*status)) sbp2_agent_reset_no_wait(base_orb->lu); switch (STATUS_GET_RESPONSE(*status)) { case SBP2_STATUS_REQUEST_COMPLETE: result = DID_OK << 16; break; case SBP2_STATUS_TRANSPORT_FAILURE: result = DID_BUS_BUSY << 16; break; case SBP2_STATUS_ILLEGAL_REQUEST: case SBP2_STATUS_VENDOR_DEPENDENT: default: result = DID_ERROR << 16; break; } if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), orb->cmd->sense_buffer); } else { /* * If the orb completes with status == NULL, something * went wrong, typically a bus reset happened mid-orb * or when sending the write (less likely). */ result = DID_BUS_BUSY << 16; sbp2_conditionally_block(base_orb->lu); } dma_unmap_single(device->card->device, orb->base.request_bus, sizeof(orb->request), DMA_TO_DEVICE); sbp2_unmap_scatterlist(device->card->device, orb); orb->cmd->result = result; scsi_done(orb->cmd); } static int sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device, struct sbp2_logical_unit *lu) { struct scatterlist *sg = scsi_sglist(orb->cmd); int i, n; n = scsi_dma_map(orb->cmd); if (n <= 0) goto fail; /* * Handle the special case where there is only one element in * the scatter list by converting it to an immediate block * request. This is also a workaround for broken devices such * as the second generation iPod which doesn't support page * tables. */ if (n == 1) { orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high); orb->request.data_descriptor.low = cpu_to_be32(sg_dma_address(sg)); orb->request.misc |= cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg))); return 0; } for_each_sg(sg, sg, n, i) { orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16); orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg)); } orb->page_table_bus = dma_map_single(device->card->device, orb->page_table, sizeof(orb->page_table), DMA_TO_DEVICE); if (dma_mapping_error(device->card->device, orb->page_table_bus)) goto fail_page_table; /* * The data_descriptor pointer is the one case where we need * to fill in the node ID part of the address. All other * pointers assume that the data referenced reside on the * initiator (i.e. us), but data_descriptor can refer to data * on other nodes so we need to put our ID in descriptor.high. */ orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high); orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus); orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT | COMMAND_ORB_DATA_SIZE(n)); return 0; fail_page_table: scsi_dma_unmap(orb->cmd); fail: return -ENOMEM; } /* SCSI stack integration */ static int sbp2_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmd) { struct sbp2_logical_unit *lu = cmd->device->hostdata; struct fw_device *device = target_parent_device(lu->tgt); struct sbp2_command_orb *orb; int generation, retval = SCSI_MLQUEUE_HOST_BUSY; orb = kzalloc(sizeof(*orb), GFP_ATOMIC); if (orb == NULL) return SCSI_MLQUEUE_HOST_BUSY; /* Initialize rcode to something not RCODE_COMPLETE. */ orb->base.rcode = -1; kref_init(&orb->base.kref); orb->cmd = cmd; orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL); orb->request.misc = cpu_to_be32( COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) | COMMAND_ORB_SPEED(device->max_speed) | COMMAND_ORB_NOTIFY); if (cmd->sc_data_direction == DMA_FROM_DEVICE) orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION); generation = device->generation; smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */ if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) goto out; memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len); orb->base.callback = complete_command_orb; orb->base.request_bus = dma_map_single(device->card->device, &orb->request, sizeof(orb->request), DMA_TO_DEVICE); if (dma_mapping_error(device->card->device, orb->base.request_bus)) { sbp2_unmap_scatterlist(device->card->device, orb); goto out; } sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation, lu->command_block_agent_address + SBP2_ORB_POINTER); retval = 0; out: kref_put(&orb->base.kref, free_orb); return retval; } static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) { struct sbp2_logical_unit *lu = sdev->hostdata; /* (Re-)Adding logical units via the SCSI stack is not supported. */ if (!lu) return -ENOSYS; sdev->allow_restart = 1; /* * SBP-2 does not require any alignment, but we set it anyway * for compatibility with earlier versions of this driver. */ blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) sdev->inquiry_len = 36; return 0; } static int sbp2_scsi_slave_configure(struct scsi_device *sdev) { struct sbp2_logical_unit *lu = sdev->hostdata; sdev->use_10_for_rw = 1; if (sbp2_param_exclusive_login) sdev->manage_start_stop = 1; if (sdev->type == TYPE_ROM) sdev->use_10_for_ms = 1; if (sdev->type == TYPE_DISK && lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) sdev->skip_ms_page_8 = 1; if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) sdev->fix_capacity = 1; if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION) sdev->start_stop_pwr_cond = 1; if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) blk_queue_max_hw_sectors(sdev->request_queue, 128 * 1024 / 512); return 0; } /* * Called by scsi stack when something has really gone wrong. Usually * called when a command has timed-out for some reason. */ static int sbp2_scsi_abort(struct scsi_cmnd *cmd) { struct sbp2_logical_unit *lu = cmd->device->hostdata; dev_notice(lu_dev(lu), "sbp2_scsi_abort\n"); sbp2_agent_reset(lu); sbp2_cancel_orbs(lu); return SUCCESS; } /* * Format of /sys/bus/scsi/devices/.../ieee1394_id: * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) * * This is the concatenation of target port identifier and logical unit * identifier as per SAM-2...SAM-4 annex A. */ static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); struct sbp2_logical_unit *lu; if (!sdev) return 0; lu = sdev->hostdata; return sprintf(buf, "%016llx:%06x:%04x\n", (unsigned long long)lu->tgt->guid, lu->tgt->directory_id, lu->lun); } static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); static struct attribute *sbp2_scsi_sysfs_attrs[] = { &dev_attr_ieee1394_id.attr, NULL }; ATTRIBUTE_GROUPS(sbp2_scsi_sysfs); static struct scsi_host_template scsi_driver_template = { .module = THIS_MODULE, .name = "SBP-2 IEEE-1394", .proc_name = "sbp2", .queuecommand = sbp2_scsi_queuecommand, .slave_alloc = sbp2_scsi_slave_alloc, .slave_configure = sbp2_scsi_slave_configure, .eh_abort_handler = sbp2_scsi_abort, .this_id = -1, .sg_tablesize = SG_ALL, .max_segment_size = SBP2_MAX_SEG_SIZE, .can_queue = 1, .sdev_groups = sbp2_scsi_sysfs_groups, }; MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); MODULE_DESCRIPTION("SCSI over IEEE1394"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); /* Provide a module alias so root-on-sbp2 initrds don't break. */ MODULE_ALIAS("sbp2"); static int __init sbp2_init(void) { return driver_register(&sbp2_driver.driver); } static void __exit sbp2_cleanup(void) { driver_unregister(&sbp2_driver.driver); } module_init(sbp2_init); module_exit(sbp2_cleanup);
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