From: Stefan Richter Date: Sat, 25 Aug 2007 12:05:28 +0000 (+0200) Subject: firewire: fw-sbp2: add support for multiple logical units per target X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5a3c2be6c9a5641a06c71c906645d676fa4d3fdc;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git firewire: fw-sbp2: add support for multiple logical units per target Fixes "New firewire stack only recognizing half of a chain of drives", https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=242254 Signed-off-by: Stefan Richter --- diff --git a/drivers/firewire/fw-device.h b/drivers/firewire/fw-device.h index d13e6a69707..894d4a92a18 100644 --- a/drivers/firewire/fw-device.h +++ b/drivers/firewire/fw-device.h @@ -102,11 +102,6 @@ fw_unit(struct device *dev) #define CSR_INSTANCE 0x18 #define CSR_DIRECTORY_ID 0x20 -#define SBP2_COMMAND_SET_SPECIFIER 0x38 -#define SBP2_COMMAND_SET 0x39 -#define SBP2_COMMAND_SET_REVISION 0x3b -#define SBP2_FIRMWARE_REVISION 0x3c - struct fw_csr_iterator { u32 *p; u32 *end; diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index 7ecc154a827..1efc67b1d26 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c @@ -41,7 +41,6 @@ #include #include -#include #include #include @@ -66,31 +65,49 @@ typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); static const char sbp2_driver_name[] = "sbp2"; -struct sbp2_device { - struct kref kref; - struct fw_unit *unit; +/* + * 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 scsi_device *sdev; struct fw_address_handler address_handler; struct list_head orb_list; - u64 management_agent_address; + u64 command_block_agent_address; - u32 workarounds; + u16 lun; int login_id; /* - * We cache these addresses and only update them once we've - * logged in or reconnected to the sbp2 device. That way, any - * IO to the device will automatically fail and get retried if - * it happens in a window where the device is not ready to - * handle it (e.g. after a bus reset but before we reconnect). + * 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 node_id; - int address_high; int generation; - int retries; struct delayed_work work; }; +/* + * We create one struct sbp2_target per IEEE 1212 Unit Directory + * and one struct Scsi_Host per sbp2_target. + */ +struct sbp2_target { + struct kref kref; + struct fw_unit *unit; + + u64 management_agent_address; + int directory_id; + int node_id; + int address_high; + + unsigned workarounds; + struct list_head lu_list; +}; + #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 #define SBP2_MAX_SECTORS 255 /* Max sectors supported */ #define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */ @@ -101,10 +118,9 @@ struct sbp2_device { #define SBP2_DIRECTION_FROM_MEDIA 0x1 /* Unit directory keys */ -#define SBP2_COMMAND_SET_SPECIFIER 0x38 -#define SBP2_COMMAND_SET 0x39 -#define SBP2_COMMAND_SET_REVISION 0x3b -#define SBP2_FIRMWARE_REVISION 0x3c +#define SBP2_CSR_FIRMWARE_REVISION 0x3c +#define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 +#define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 /* Flags for detected oddities and brokeness */ #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 @@ -219,7 +235,7 @@ struct sbp2_command_orb { } request; struct scsi_cmnd *cmd; scsi_done_fn_t done; - struct fw_unit *unit; + struct sbp2_logical_unit *lu; struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); dma_addr_t page_table_bus; @@ -295,7 +311,7 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request, unsigned long long offset, void *payload, size_t length, void *callback_data) { - struct sbp2_device *sd = callback_data; + struct sbp2_logical_unit *lu = callback_data; struct sbp2_orb *orb; struct sbp2_status status; size_t header_size; @@ -319,7 +335,7 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request, /* Lookup the orb corresponding to this status write. */ spin_lock_irqsave(&card->lock, flags); - list_for_each_entry(orb, &sd->orb_list, link) { + list_for_each_entry(orb, &lu->orb_list, link) { if (STATUS_GET_ORB_HIGH(status) == 0 && STATUS_GET_ORB_LOW(status) == orb->request_bus) { orb->rcode = RCODE_COMPLETE; @@ -329,7 +345,7 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request, } spin_unlock_irqrestore(&card->lock, flags); - if (&orb->link != &sd->orb_list) + if (&orb->link != &lu->orb_list) orb->callback(orb, &status); else fw_error("status write for unknown orb\n"); @@ -371,11 +387,10 @@ complete_transaction(struct fw_card *card, int rcode, } static void -sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, +sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, int node_id, int generation, u64 offset) { - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd = unit->device.driver_data; + struct fw_device *device = fw_device(lu->tgt->unit->device.parent); unsigned long flags; orb->pointer.high = 0; @@ -383,7 +398,7 @@ sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer)); spin_lock_irqsave(&device->card->lock, flags); - list_add_tail(&orb->link, &sd->orb_list); + list_add_tail(&orb->link, &lu->orb_list); spin_unlock_irqrestore(&device->card->lock, flags); /* Take a ref for the orb list and for the transaction callback. */ @@ -396,10 +411,9 @@ sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit, complete_transaction, orb); } -static int sbp2_cancel_orbs(struct fw_unit *unit) +static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) { - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd = unit->device.driver_data; + struct fw_device *device = fw_device(lu->tgt->unit->device.parent); struct sbp2_orb *orb, *next; struct list_head list; unsigned long flags; @@ -407,7 +421,7 @@ static int sbp2_cancel_orbs(struct fw_unit *unit) INIT_LIST_HEAD(&list); spin_lock_irqsave(&device->card->lock, flags); - list_splice_init(&sd->orb_list, &list); + list_splice_init(&lu->orb_list, &list); spin_unlock_irqrestore(&device->card->lock, flags); list_for_each_entry_safe(orb, next, &list, link) { @@ -434,11 +448,11 @@ complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) } static int -sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, - int function, int lun, void *response) +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 = fw_device(unit->device.parent); - struct sbp2_device *sd = unit->device.driver_data; + struct fw_device *device = fw_device(lu->tgt->unit->device.parent); struct sbp2_management_orb *orb; int retval = -ENOMEM; @@ -459,12 +473,12 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, orb->request.misc = MANAGEMENT_ORB_NOTIFY | MANAGEMENT_ORB_FUNCTION(function) | - MANAGEMENT_ORB_LUN(lun); + MANAGEMENT_ORB_LUN(lun_or_login_id); orb->request.length = MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)); - orb->request.status_fifo.high = sd->address_handler.offset >> 32; - orb->request.status_fifo.low = sd->address_handler.offset; + orb->request.status_fifo.high = lu->address_handler.offset >> 32; + orb->request.status_fifo.low = lu->address_handler.offset; if (function == SBP2_LOGIN_REQUEST) { orb->request.misc |= @@ -483,14 +497,14 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, if (dma_mapping_error(orb->base.request_bus)) goto fail_mapping_request; - sbp2_send_orb(&orb->base, unit, - node_id, generation, sd->management_agent_address); + sbp2_send_orb(&orb->base, lu, node_id, generation, + lu->tgt->management_agent_address); wait_for_completion_timeout(&orb->done, msecs_to_jiffies(SBP2_ORB_TIMEOUT)); retval = -EIO; - if (sbp2_cancel_orbs(unit) == 0) { + if (sbp2_cancel_orbs(lu) == 0) { fw_error("orb reply timed out, rcode=0x%02x\n", orb->base.rcode); goto out; @@ -535,10 +549,9 @@ complete_agent_reset_write(struct fw_card *card, int rcode, kfree(t); } -static int sbp2_agent_reset(struct fw_unit *unit) +static int sbp2_agent_reset(struct sbp2_logical_unit *lu) { - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd = unit->device.driver_data; + struct fw_device *device = fw_device(lu->tgt->unit->device.parent); struct fw_transaction *t; static u32 zero; @@ -547,181 +560,261 @@ static int sbp2_agent_reset(struct fw_unit *unit) return -ENOMEM; fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, - sd->node_id, sd->generation, device->max_speed, - sd->command_block_agent_address + SBP2_AGENT_RESET, + lu->tgt->node_id, lu->generation, device->max_speed, + lu->command_block_agent_address + SBP2_AGENT_RESET, &zero, sizeof(zero), complete_agent_reset_write, t); return 0; } -static void sbp2_reconnect(struct work_struct *work); -static struct scsi_host_template scsi_driver_template; - -static void release_sbp2_device(struct kref *kref) +static void sbp2_release_target(struct kref *kref) { - struct sbp2_device *sd = container_of(kref, struct sbp2_device, kref); - struct Scsi_Host *host = - container_of((void *)sd, struct Scsi_Host, hostdata[0]); - - scsi_remove_host(host); - sbp2_send_management_orb(sd->unit, sd->node_id, sd->generation, - SBP2_LOGOUT_REQUEST, sd->login_id, NULL); - fw_core_remove_address_handler(&sd->address_handler); - fw_notify("removed sbp2 unit %s\n", sd->unit->device.bus_id); - put_device(&sd->unit->device); - scsi_host_put(host); + struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref); + struct sbp2_logical_unit *lu, *next; + struct Scsi_Host *shost = + container_of((void *)tgt, struct Scsi_Host, hostdata[0]); + + list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { + if (lu->sdev) + scsi_remove_device(lu->sdev); + + sbp2_send_management_orb(lu, tgt->node_id, lu->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); + fw_notify("released %s\n", tgt->unit->device.bus_id); + + put_device(&tgt->unit->device); + scsi_host_put(shost); } +static void sbp2_reconnect(struct work_struct *work); + static void sbp2_login(struct work_struct *work) { - struct sbp2_device *sd = - container_of(work, struct sbp2_device, work.work); - struct Scsi_Host *host = - container_of((void *)sd, struct Scsi_Host, hostdata[0]); - struct fw_unit *unit = sd->unit; + struct sbp2_logical_unit *lu = + container_of(work, struct sbp2_logical_unit, work.work); + struct Scsi_Host *shost = + container_of((void *)lu->tgt, struct Scsi_Host, hostdata[0]); + struct scsi_device *sdev; + struct scsi_lun eight_bytes_lun; + struct fw_unit *unit = lu->tgt->unit; struct fw_device *device = fw_device(unit->device.parent); struct sbp2_login_response response; - int generation, node_id, local_node_id, lun, retval; - - /* FIXME: Make this work for multi-lun devices. */ - lun = 0; + int generation, node_id, local_node_id; generation = device->card->generation; node_id = device->node->node_id; local_node_id = device->card->local_node->node_id; - if (sbp2_send_management_orb(unit, node_id, generation, - SBP2_LOGIN_REQUEST, lun, &response) < 0) { - if (sd->retries++ < 5) { - schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); + if (sbp2_send_management_orb(lu, node_id, generation, + SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { + if (lu->retries++ < 5) { + schedule_delayed_work(&lu->work, DIV_ROUND_UP(HZ, 5)); } else { - fw_error("failed to login to %s\n", - unit->device.bus_id); - kref_put(&sd->kref, release_sbp2_device); + fw_error("failed to login to %s LUN %04x\n", + unit->device.bus_id, lu->lun); + kref_put(&lu->tgt->kref, sbp2_release_target); } return; } - sd->generation = generation; - sd->node_id = node_id; - sd->address_high = local_node_id << 16; + lu->generation = generation; + lu->tgt->node_id = node_id; + lu->tgt->address_high = local_node_id << 16; /* Get command block agent offset and login id. */ - sd->command_block_agent_address = + lu->command_block_agent_address = ((u64) (response.command_block_agent.high & 0xffff) << 32) | response.command_block_agent.low; - sd->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); + lu->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); - fw_notify("logged in to sbp2 unit %s (%d retries)\n", - unit->device.bus_id, sd->retries); - fw_notify(" - management_agent_address: 0x%012llx\n", - (unsigned long long) sd->management_agent_address); - fw_notify(" - command_block_agent_address: 0x%012llx\n", - (unsigned long long) sd->command_block_agent_address); - fw_notify(" - status write address: 0x%012llx\n", - (unsigned long long) sd->address_handler.offset); + fw_notify("logged in to %s LUN %04x (%d retries)\n", + unit->device.bus_id, lu->lun, lu->retries); #if 0 /* FIXME: The linux1394 sbp2 does this last step. */ sbp2_set_busy_timeout(scsi_id); #endif - PREPARE_DELAYED_WORK(&sd->work, sbp2_reconnect); - sbp2_agent_reset(unit); + PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); + sbp2_agent_reset(lu); + + memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); + eight_bytes_lun.scsi_lun[0] = (lu->lun >> 8) & 0xff; + eight_bytes_lun.scsi_lun[1] = lu->lun & 0xff; - /* FIXME: Loop over luns here. */ - lun = 0; - retval = scsi_add_device(host, 0, 0, lun); - if (retval < 0) { - sbp2_send_management_orb(unit, sd->node_id, sd->generation, - SBP2_LOGOUT_REQUEST, sd->login_id, - NULL); + sdev = __scsi_add_device(shost, 0, 0, + scsilun_to_int(&eight_bytes_lun), lu); + if (IS_ERR(sdev)) { + sbp2_send_management_orb(lu, node_id, generation, + SBP2_LOGOUT_REQUEST, lu->login_id, NULL); /* * Set this back to sbp2_login so we fall back and * retry login on bus reset. */ - PREPARE_DELAYED_WORK(&sd->work, sbp2_login); + PREPARE_DELAYED_WORK(&lu->work, sbp2_login); + } else { + lu->sdev = sdev; + scsi_device_put(sdev); } - kref_put(&sd->kref, release_sbp2_device); + kref_put(&lu->tgt->kref, sbp2_release_target); } -static int sbp2_probe(struct device *dev) +static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) { - struct fw_unit *unit = fw_unit(dev); - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd; - struct fw_csr_iterator ci; - struct Scsi_Host *host; - int i, key, value, err; - u32 model, firmware_revision; + struct sbp2_logical_unit *lu; - err = -ENOMEM; - host = scsi_host_alloc(&scsi_driver_template, sizeof(*sd)); - if (host == NULL) - goto fail; + lu = kmalloc(sizeof(*lu), GFP_KERNEL); + if (!lu) + return -ENOMEM; - sd = (struct sbp2_device *) host->hostdata; - unit->device.driver_data = sd; - sd->unit = unit; - INIT_LIST_HEAD(&sd->orb_list); - kref_init(&sd->kref); + lu->address_handler.length = 0x100; + lu->address_handler.address_callback = sbp2_status_write; + lu->address_handler.callback_data = lu; - sd->address_handler.length = 0x100; - sd->address_handler.address_callback = sbp2_status_write; - sd->address_handler.callback_data = sd; + if (fw_core_add_address_handler(&lu->address_handler, + &fw_high_memory_region) < 0) { + kfree(lu); + return -ENOMEM; + } - err = fw_core_add_address_handler(&sd->address_handler, - &fw_high_memory_region); - if (err < 0) - goto fail_host; + lu->tgt = tgt; + lu->sdev = NULL; + lu->lun = lun_entry & 0xffff; + lu->retries = 0; + INIT_LIST_HEAD(&lu->orb_list); + INIT_DELAYED_WORK(&lu->work, sbp2_login); - err = fw_device_enable_phys_dma(device); - if (err < 0) - goto fail_address_handler; + list_add_tail(&lu->link, &tgt->lu_list); + return 0; +} - err = scsi_add_host(host, &unit->device); - if (err < 0) - goto fail_address_handler; +static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory) +{ + struct fw_csr_iterator ci; + int key, value; - /* - * Scan unit directory to get management agent address, - * firmware revison and model. Initialize firmware_revision - * and model to values that wont match anything in our table. - */ - firmware_revision = 0xff000000; - model = 0xff000000; - fw_csr_iterator_init(&ci, unit->directory); + 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, 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: - sd->management_agent_address = - 0xfffff0000000ULL + 4 * value; + tgt->management_agent_address = + CSR_REGISTER_BASE + 4 * value; break; - case SBP2_FIRMWARE_REVISION: - firmware_revision = value; + + case CSR_DIRECTORY_ID: + tgt->directory_id = value; break; + case CSR_MODEL: - model = value; + *model = value; + break; + + case SBP2_CSR_FIRMWARE_REVISION: + *firmware_revision = value; + break; + + case SBP2_CSR_LOGICAL_UNIT_NUMBER: + if (sbp2_add_logical_unit(tgt, value) < 0) + return -ENOMEM; + break; + + case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: + if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0) + return -ENOMEM; break; } } + return 0; +} + +static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, + u32 firmware_revision) +{ + int i; + + tgt->workarounds = 0; 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 != ~0) continue; - sd->workarounds |= sbp2_workarounds_table[i].workarounds; + + tgt->workarounds |= sbp2_workarounds_table[i].workarounds; break; } - if (sd->workarounds) - fw_notify("Workarounds for node %s: 0x%x " + if (tgt->workarounds) + fw_notify("Workarounds for %s: 0x%x " "(firmware_revision 0x%06x, model_id 0x%06x)\n", - unit->device.bus_id, - sd->workarounds, firmware_revision, model); + tgt->unit->device.bus_id, + tgt->workarounds, firmware_revision, model); +} + +static struct scsi_host_template scsi_driver_template; + +static int sbp2_probe(struct device *dev) +{ + struct fw_unit *unit = fw_unit(dev); + struct fw_device *device = fw_device(unit->device.parent); + struct sbp2_target *tgt; + struct sbp2_logical_unit *lu; + struct Scsi_Host *shost; + u32 model, firmware_revision; + + shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); + if (shost == NULL) + return -ENOMEM; + + tgt = (struct sbp2_target *)shost->hostdata; + unit->device.driver_data = tgt; + tgt->unit = unit; + kref_init(&tgt->kref); + INIT_LIST_HEAD(&tgt->lu_list); + + if (fw_device_enable_phys_dma(device) < 0) + goto fail_shost_put; + + if (scsi_add_host(shost, &unit->device) < 0) + goto fail_shost_put; + + /* Initialize to values that won't match anything in our table. */ + firmware_revision = 0xff000000; + model = 0xff000000; + + /* implicit directory ID */ + tgt->directory_id = ((unit->directory - device->config_rom) * 4 + + CSR_CONFIG_ROM) & 0xffffff; + + if (sbp2_scan_unit_dir(tgt, unit->directory, &model, + &firmware_revision) < 0) + goto fail_tgt_put; + + sbp2_init_workarounds(tgt, model, firmware_revision); get_device(&unit->device); @@ -730,35 +823,34 @@ static int sbp2_probe(struct device *dev) * reschedule retries. Always get the ref before scheduling * work. */ - INIT_DELAYED_WORK(&sd->work, sbp2_login); - if (schedule_delayed_work(&sd->work, 0)) - kref_get(&sd->kref); - + list_for_each_entry(lu, &tgt->lu_list, link) + if (schedule_delayed_work(&lu->work, 0)) + kref_get(&tgt->kref); return 0; - fail_address_handler: - fw_core_remove_address_handler(&sd->address_handler); - fail_host: - scsi_host_put(host); - fail: - return err; + fail_tgt_put: + kref_put(&tgt->kref, sbp2_release_target); + return -ENOMEM; + + fail_shost_put: + scsi_host_put(shost); + return -ENOMEM; } static int sbp2_remove(struct device *dev) { struct fw_unit *unit = fw_unit(dev); - struct sbp2_device *sd = unit->device.driver_data; - - kref_put(&sd->kref, release_sbp2_device); + struct sbp2_target *tgt = unit->device.driver_data; + kref_put(&tgt->kref, sbp2_release_target); return 0; } static void sbp2_reconnect(struct work_struct *work) { - struct sbp2_device *sd = - container_of(work, struct sbp2_device, work.work); - struct fw_unit *unit = sd->unit; + struct sbp2_logical_unit *lu = + container_of(work, struct sbp2_logical_unit, work.work); + struct fw_unit *unit = lu->tgt->unit; struct fw_device *device = fw_device(unit->device.parent); int generation, node_id, local_node_id; @@ -766,40 +858,49 @@ static void sbp2_reconnect(struct work_struct *work) node_id = device->node->node_id; local_node_id = device->card->local_node->node_id; - if (sbp2_send_management_orb(unit, node_id, generation, + if (sbp2_send_management_orb(lu, node_id, generation, SBP2_RECONNECT_REQUEST, - sd->login_id, NULL) < 0) { - if (sd->retries++ >= 5) { + lu->login_id, NULL) < 0) { + if (lu->retries++ >= 5) { fw_error("failed to reconnect to %s\n", unit->device.bus_id); /* Fall back and try to log in again. */ - sd->retries = 0; - PREPARE_DELAYED_WORK(&sd->work, sbp2_login); + lu->retries = 0; + PREPARE_DELAYED_WORK(&lu->work, sbp2_login); } - schedule_delayed_work(&sd->work, DIV_ROUND_UP(HZ, 5)); + schedule_delayed_work(&lu->work, DIV_ROUND_UP(HZ, 5)); return; } - sd->generation = generation; - sd->node_id = node_id; - sd->address_high = local_node_id << 16; + lu->generation = generation; + lu->tgt->node_id = node_id; + lu->tgt->address_high = local_node_id << 16; - fw_notify("reconnected to unit %s (%d retries)\n", - unit->device.bus_id, sd->retries); - sbp2_agent_reset(unit); - sbp2_cancel_orbs(unit); - kref_put(&sd->kref, release_sbp2_device); + fw_notify("reconnected to %s LUN %04x (%d retries)\n", + unit->device.bus_id, lu->lun, lu->retries); + + sbp2_agent_reset(lu); + sbp2_cancel_orbs(lu); + + kref_put(&lu->tgt->kref, sbp2_release_target); } static void sbp2_update(struct fw_unit *unit) { - struct fw_device *device = fw_device(unit->device.parent); - struct sbp2_device *sd = unit->device.driver_data; + struct sbp2_target *tgt = unit->device.driver_data; + struct sbp2_logical_unit *lu; - sd->retries = 0; - fw_device_enable_phys_dma(device); - if (schedule_delayed_work(&sd->work, 0)) - kref_get(&sd->kref); + fw_device_enable_phys_dma(fw_device(unit->device.parent)); + + /* + * 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) { + lu->retries = 0; + if (schedule_delayed_work(&lu->work, 0)) + kref_get(&tgt->kref); + } } #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e @@ -869,13 +970,12 @@ 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_unit *unit = orb->unit; - struct fw_device *device = fw_device(unit->device.parent); + struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent); int result; if (status != NULL) { if (STATUS_GET_DEAD(*status)) - sbp2_agent_reset(unit); + sbp2_agent_reset(orb->lu); switch (STATUS_GET_RESPONSE(*status)) { case SBP2_STATUS_REQUEST_COMPLETE: @@ -919,12 +1019,10 @@ complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) orb->done(orb->cmd); } -static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) +static int +sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device, + struct sbp2_logical_unit *lu) { - struct sbp2_device *sd = - (struct sbp2_device *)orb->cmd->device->host->hostdata; - struct fw_unit *unit = sd->unit; - struct fw_device *device = fw_device(unit->device.parent); struct scatterlist *sg; int sg_len, l, i, j, count; dma_addr_t sg_addr; @@ -943,10 +1041,9 @@ static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) * tables. */ if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { - orb->request.data_descriptor.high = sd->address_high; + orb->request.data_descriptor.high = lu->tgt->address_high; orb->request.data_descriptor.low = sg_dma_address(sg); - orb->request.misc |= - COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); + orb->request.misc |= COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); return 0; } @@ -990,7 +1087,7 @@ static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) * 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 = sd->address_high; + orb->request.data_descriptor.high = lu->tgt->address_high; orb->request.data_descriptor.low = orb->page_table_bus; orb->request.misc |= COMMAND_ORB_PAGE_TABLE_PRESENT | @@ -1009,12 +1106,11 @@ static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) { - struct sbp2_device *sd = - (struct sbp2_device *)cmd->device->host->hostdata; - struct fw_unit *unit = sd->unit; - struct fw_device *device = fw_device(unit->device.parent); + struct sbp2_logical_unit *lu = cmd->device->hostdata; + struct fw_device *device = fw_device(lu->tgt->unit->device.parent); struct sbp2_command_orb *orb; unsigned max_payload; + int retval = SCSI_MLQUEUE_HOST_BUSY; /* * Bidirectional commands are not yet implemented, and unknown @@ -1030,14 +1126,14 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) orb = kzalloc(sizeof(*orb), GFP_ATOMIC); if (orb == NULL) { fw_notify("failed to alloc orb\n"); - goto fail_alloc; + return SCSI_MLQUEUE_HOST_BUSY; } /* Initialize rcode to something not RCODE_COMPLETE. */ orb->base.rcode = -1; kref_init(&orb->base.kref); - orb->unit = unit; + orb->lu = lu; orb->done = done; orb->cmd = cmd; @@ -1063,8 +1159,8 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) orb->request.misc |= COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA); - if (scsi_sg_count(cmd) && sbp2_command_orb_map_scatterlist(orb) < 0) - goto fail_mapping; + if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) + goto out; fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); @@ -1077,49 +1173,47 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) dma_map_single(device->card->device, &orb->request, sizeof(orb->request), DMA_TO_DEVICE); if (dma_mapping_error(orb->base.request_bus)) - goto fail_mapping; - - sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation, - sd->command_block_agent_address + SBP2_ORB_POINTER); - - kref_put(&orb->base.kref, free_orb); - return 0; + goto out; - fail_mapping: + sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation, + lu->command_block_agent_address + SBP2_ORB_POINTER); + retval = 0; + out: kref_put(&orb->base.kref, free_orb); - fail_alloc: - return SCSI_MLQUEUE_HOST_BUSY; + return retval; } static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) { - struct sbp2_device *sd = (struct sbp2_device *)sdev->host->hostdata; + struct sbp2_logical_unit *lu = sdev->hostdata; sdev->allow_restart = 1; - if (sd->workarounds & SBP2_WORKAROUND_INQUIRY_36) + 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_device *sd = (struct sbp2_device *)sdev->host->hostdata; - struct fw_unit *unit = sd->unit; + struct sbp2_logical_unit *lu = sdev->hostdata; sdev->use_10_for_rw = 1; if (sdev->type == TYPE_ROM) sdev->use_10_for_ms = 1; + if (sdev->type == TYPE_DISK && - sd->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) + lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) sdev->skip_ms_page_8 = 1; - if (sd->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) { - fw_notify("setting fix_capacity for %s\n", unit->device.bus_id); + + if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) sdev->fix_capacity = 1; - } - if (sd->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) + + if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); + return 0; } @@ -1129,13 +1223,11 @@ static int sbp2_scsi_slave_configure(struct scsi_device *sdev) */ static int sbp2_scsi_abort(struct scsi_cmnd *cmd) { - struct sbp2_device *sd = - (struct sbp2_device *)cmd->device->host->hostdata; - struct fw_unit *unit = sd->unit; + struct sbp2_logical_unit *lu = cmd->device->hostdata; fw_notify("sbp2_scsi_abort\n"); - sbp2_agent_reset(unit); - sbp2_cancel_orbs(unit); + sbp2_agent_reset(lu); + sbp2_cancel_orbs(lu); return SUCCESS; } @@ -1152,37 +1244,18 @@ sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, char *buf) { struct scsi_device *sdev = to_scsi_device(dev); - struct sbp2_device *sd; - struct fw_unit *unit; + struct sbp2_logical_unit *lu; struct fw_device *device; - u32 directory_id; - struct fw_csr_iterator ci; - int key, value, lun; if (!sdev) return 0; - sd = (struct sbp2_device *)sdev->host->hostdata; - unit = sd->unit; - device = fw_device(unit->device.parent); - - /* implicit directory ID */ - directory_id = ((unit->directory - device->config_rom) * 4 - + CSR_CONFIG_ROM) & 0xffffff; - - /* explicit directory ID, overrides implicit ID if present */ - fw_csr_iterator_init(&ci, unit->directory); - while (fw_csr_iterator_next(&ci, &key, &value)) - if (key == CSR_DIRECTORY_ID) { - directory_id = value; - break; - } - /* FIXME: Make this work for multi-lun devices. */ - lun = 0; + lu = sdev->hostdata; + device = fw_device(lu->tgt->unit->device.parent); return sprintf(buf, "%08x%08x:%06x:%04x\n", device->config_rom[3], device->config_rom[4], - directory_id, lun); + lu->tgt->directory_id, lu->lun); } static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);