/* * QLogic iSCSI HBA Driver * Copyright (c) 2003-2006 QLogic Corporation * * See LICENSE.qla4xxx for copyright and licensing details. */ #include #include #include #include "ql4_def.h" /* * Driver version */ char qla4xxx_version_str[40]; /* * SRB allocation cache */ static struct kmem_cache *srb_cachep; /* * Module parameter information and variables */ int ql4xdiscoverywait = 60; module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR); MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time"); int ql4xdontresethba = 0; module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR); MODULE_PARM_DESC(ql4xdontresethba, "Dont reset the HBA when the driver gets 0x8002 AEN " " default it will reset hba :0" " set to 1 to avoid resetting HBA"); int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */ module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR); MODULE_PARM_DESC(ql4xextended_error_logging, "Option to enable extended error logging, " "Default is 0 - no logging, 1 - debug logging"); /* * SCSI host template entry points */ void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha); /* * iSCSI template entry points */ static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no, uint32_t enable, struct sockaddr *dst_addr); static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, enum iscsi_param param, char *buf); static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, enum iscsi_param param, char *buf); static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag); static int qla4xxx_conn_start(struct iscsi_cls_conn *conn); static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session); /* * SCSI host template entry points */ static int qla4xxx_queuecommand(struct scsi_cmnd *cmd, void (*done) (struct scsi_cmnd *)); static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd); static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd); static int qla4xxx_slave_alloc(struct scsi_device *device); static int qla4xxx_slave_configure(struct scsi_device *device); static void qla4xxx_slave_destroy(struct scsi_device *sdev); static struct scsi_host_template qla4xxx_driver_template = { .module = THIS_MODULE, .name = DRIVER_NAME, .proc_name = DRIVER_NAME, .queuecommand = qla4xxx_queuecommand, .eh_device_reset_handler = qla4xxx_eh_device_reset, .eh_host_reset_handler = qla4xxx_eh_host_reset, .slave_configure = qla4xxx_slave_configure, .slave_alloc = qla4xxx_slave_alloc, .slave_destroy = qla4xxx_slave_destroy, .this_id = -1, .cmd_per_lun = 3, .use_clustering = ENABLE_CLUSTERING, .sg_tablesize = SG_ALL, .max_sectors = 0xFFFF, }; static struct iscsi_transport qla4xxx_iscsi_transport = { .owner = THIS_MODULE, .name = DRIVER_NAME, .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS | ISCSI_TARGET_NAME | ISCSI_TPGT, .sessiondata_size = sizeof(struct ddb_entry), .host_template = &qla4xxx_driver_template, .tgt_dscvr = qla4xxx_tgt_dscvr, .get_conn_param = qla4xxx_conn_get_param, .get_session_param = qla4xxx_sess_get_param, .start_conn = qla4xxx_conn_start, .stop_conn = qla4xxx_conn_stop, .session_recovery_timedout = qla4xxx_recovery_timedout, }; static struct scsi_transport_template *qla4xxx_scsi_transport; static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session) { struct ddb_entry *ddb_entry = session->dd_data; struct scsi_qla_host *ha = ddb_entry->ha; DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) " "secs exhausted, marking device DEAD.\n", ha->host_no, __func__, ddb_entry->fw_ddb_index, ha->port_down_retry_count)); atomic_set(&ddb_entry->state, DDB_STATE_DEAD); DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = " "0x%lx\n", ha->host_no, __func__, ha->dpc_flags)); queue_work(ha->dpc_thread, &ha->dpc_work); } static int qla4xxx_conn_start(struct iscsi_cls_conn *conn) { struct iscsi_cls_session *session; struct ddb_entry *ddb_entry; session = iscsi_dev_to_session(conn->dev.parent); ddb_entry = session->dd_data; DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n", ddb_entry->ha->host_no, __func__, ddb_entry->fw_ddb_index)); iscsi_unblock_session(session); return 0; } static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag) { struct iscsi_cls_session *session; struct ddb_entry *ddb_entry; session = iscsi_dev_to_session(conn->dev.parent); ddb_entry = session->dd_data; DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n", ddb_entry->ha->host_no, __func__, ddb_entry->fw_ddb_index)); if (flag == STOP_CONN_RECOVER) iscsi_block_session(session); else printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag); } static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, enum iscsi_param param, char *buf) { struct ddb_entry *ddb_entry = sess->dd_data; int len; switch (param) { case ISCSI_PARAM_TARGET_NAME: len = snprintf(buf, PAGE_SIZE - 1, "%s\n", ddb_entry->iscsi_name); break; case ISCSI_PARAM_TPGT: len = sprintf(buf, "%u\n", ddb_entry->tpgt); break; default: return -ENOSYS; } return len; } static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, enum iscsi_param param, char *buf) { struct iscsi_cls_session *session; struct ddb_entry *ddb_entry; int len; session = iscsi_dev_to_session(conn->dev.parent); ddb_entry = session->dd_data; switch (param) { case ISCSI_PARAM_CONN_PORT: len = sprintf(buf, "%hu\n", ddb_entry->port); break; case ISCSI_PARAM_CONN_ADDRESS: /* TODO: what are the ipv6 bits */ len = sprintf(buf, "%u.%u.%u.%u\n", NIPQUAD(ddb_entry->ip_addr)); break; default: return -ENOSYS; } return len; } static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no, uint32_t enable, struct sockaddr *dst_addr) { struct scsi_qla_host *ha; struct Scsi_Host *shost; struct sockaddr_in *addr; struct sockaddr_in6 *addr6; int ret = 0; shost = scsi_host_lookup(host_no); if (IS_ERR(shost)) { printk(KERN_ERR "Could not find host no %u\n", host_no); return -ENODEV; } ha = (struct scsi_qla_host *) shost->hostdata; switch (type) { case ISCSI_TGT_DSCVR_SEND_TARGETS: if (dst_addr->sa_family == AF_INET) { addr = (struct sockaddr_in *)dst_addr; if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr, addr->sin_port) != QLA_SUCCESS) ret = -EIO; } else if (dst_addr->sa_family == AF_INET6) { /* * TODO: fix qla4xxx_send_tgts */ addr6 = (struct sockaddr_in6 *)dst_addr; if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr, addr6->sin6_port) != QLA_SUCCESS) ret = -EIO; } else ret = -ENOSYS; break; default: ret = -ENOSYS; } scsi_host_put(shost); return ret; } void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry) { if (!ddb_entry->sess) return; if (ddb_entry->conn) { iscsi_if_destroy_session_done(ddb_entry->conn); iscsi_destroy_conn(ddb_entry->conn); iscsi_remove_session(ddb_entry->sess); } iscsi_free_session(ddb_entry->sess); } int qla4xxx_add_sess(struct ddb_entry *ddb_entry) { int err; err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index); if (err) { DEBUG2(printk(KERN_ERR "Could not add session.\n")); return err; } ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0); if (!ddb_entry->conn) { iscsi_remove_session(ddb_entry->sess); DEBUG2(printk(KERN_ERR "Could not add connection.\n")); return -ENOMEM; } ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count; iscsi_if_create_session_done(ddb_entry->conn); return 0; } struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha) { struct ddb_entry *ddb_entry; struct iscsi_cls_session *sess; sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport); if (!sess) return NULL; ddb_entry = sess->dd_data; memset(ddb_entry, 0, sizeof(*ddb_entry)); ddb_entry->ha = ha; ddb_entry->sess = sess; return ddb_entry; } /* * Timer routines */ static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func, unsigned long interval) { DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n", __func__, ha->host->host_no)); init_timer(&ha->timer); ha->timer.expires = jiffies + interval * HZ; ha->timer.data = (unsigned long)ha; ha->timer.function = (void (*)(unsigned long))func; add_timer(&ha->timer); ha->timer_active = 1; } static void qla4xxx_stop_timer(struct scsi_qla_host *ha) { del_timer_sync(&ha->timer); ha->timer_active = 0; } /*** * qla4xxx_mark_device_missing - mark a device as missing. * @ha: Pointer to host adapter structure. * @ddb_entry: Pointer to device database entry * * This routine marks a device missing and resets the relogin retry count. **/ void qla4xxx_mark_device_missing(struct scsi_qla_host *ha, struct ddb_entry *ddb_entry) { atomic_set(&ddb_entry->state, DDB_STATE_MISSING); DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n", ha->host_no, ddb_entry->bus, ddb_entry->target, ddb_entry->fw_ddb_index)); iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED); } static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha, struct ddb_entry *ddb_entry, struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) { struct srb *srb; srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC); if (!srb) return srb; atomic_set(&srb->ref_count, 1); srb->ha = ha; srb->ddb = ddb_entry; srb->cmd = cmd; srb->flags = 0; cmd->SCp.ptr = (void *)srb; cmd->scsi_done = done; return srb; } static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb) { struct scsi_cmnd *cmd = srb->cmd; if (srb->flags & SRB_DMA_VALID) { if (cmd->use_sg) { pci_unmap_sg(ha->pdev, cmd->request_buffer, cmd->use_sg, cmd->sc_data_direction); } else if (cmd->request_bufflen) { pci_unmap_single(ha->pdev, srb->dma_handle, cmd->request_bufflen, cmd->sc_data_direction); } srb->flags &= ~SRB_DMA_VALID; } cmd->SCp.ptr = NULL; } void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb) { struct scsi_cmnd *cmd = srb->cmd; qla4xxx_srb_free_dma(ha, srb); mempool_free(srb, ha->srb_mempool); cmd->scsi_done(cmd); } /** * qla4xxx_queuecommand - scsi layer issues scsi command to driver. * @cmd: Pointer to Linux's SCSI command structure * @done_fn: Function that the driver calls to notify the SCSI mid-layer * that the command has been processed. * * Remarks: * This routine is invoked by Linux to send a SCSI command to the driver. * The mid-level driver tries to ensure that queuecommand never gets * invoked concurrently with itself or the interrupt handler (although * the interrupt handler may call this routine as part of request- * completion handling). Unfortunely, it sometimes calls the scheduler * in interrupt context which is a big NO! NO!. **/ static int qla4xxx_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) { struct scsi_qla_host *ha = to_qla_host(cmd->device->host); struct ddb_entry *ddb_entry = cmd->device->hostdata; struct srb *srb; int rval; if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) { cmd->result = DID_NO_CONNECT << 16; goto qc_fail_command; } goto qc_host_busy; } spin_unlock_irq(ha->host->host_lock); srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done); if (!srb) goto qc_host_busy_lock; rval = qla4xxx_send_command_to_isp(ha, srb); if (rval != QLA_SUCCESS) goto qc_host_busy_free_sp; spin_lock_irq(ha->host->host_lock); return 0; qc_host_busy_free_sp: qla4xxx_srb_free_dma(ha, srb); mempool_free(srb, ha->srb_mempool); qc_host_busy_lock: spin_lock_irq(ha->host->host_lock); qc_host_busy: return SCSI_MLQUEUE_HOST_BUSY; qc_fail_command: done(cmd); return 0; } /** * qla4xxx_mem_free - frees memory allocated to adapter * @ha: Pointer to host adapter structure. * * Frees memory previously allocated by qla4xxx_mem_alloc **/ static void qla4xxx_mem_free(struct scsi_qla_host *ha) { if (ha->queues) dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues, ha->queues_dma); ha->queues_len = 0; ha->queues = NULL; ha->queues_dma = 0; ha->request_ring = NULL; ha->request_dma = 0; ha->response_ring = NULL; ha->response_dma = 0; ha->shadow_regs = NULL; ha->shadow_regs_dma = 0; /* Free srb pool. */ if (ha->srb_mempool) mempool_destroy(ha->srb_mempool); ha->srb_mempool = NULL; /* release io space registers */ if (ha->reg) iounmap(ha->reg); pci_release_regions(ha->pdev); } /** * qla4xxx_mem_alloc - allocates memory for use by adapter. * @ha: Pointer to host adapter structure * * Allocates DMA memory for request and response queues. Also allocates memory * for srbs. **/ static int qla4xxx_mem_alloc(struct scsi_qla_host *ha) { unsigned long align; /* Allocate contiguous block of DMA memory for queues. */ ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) + sizeof(struct shadow_regs) + MEM_ALIGN_VALUE + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len, &ha->queues_dma, GFP_KERNEL); if (ha->queues == NULL) { dev_warn(&ha->pdev->dev, "Memory Allocation failed - queues.\n"); goto mem_alloc_error_exit; } memset(ha->queues, 0, ha->queues_len); /* * As per RISC alignment requirements -- the bus-address must be a * multiple of the request-ring size (in bytes). */ align = 0; if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1)) align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1)); /* Update request and response queue pointers. */ ha->request_dma = ha->queues_dma + align; ha->request_ring = (struct queue_entry *) (ha->queues + align); ha->response_dma = ha->queues_dma + align + (REQUEST_QUEUE_DEPTH * QUEUE_SIZE); ha->response_ring = (struct queue_entry *) (ha->queues + align + (REQUEST_QUEUE_DEPTH * QUEUE_SIZE)); ha->shadow_regs_dma = ha->queues_dma + align + (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE); ha->shadow_regs = (struct shadow_regs *) (ha->queues + align + (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE)); /* Allocate memory for srb pool. */ ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab, mempool_free_slab, srb_cachep); if (ha->srb_mempool == NULL) { dev_warn(&ha->pdev->dev, "Memory Allocation failed - SRB Pool.\n"); goto mem_alloc_error_exit; } return QLA_SUCCESS; mem_alloc_error_exit: qla4xxx_mem_free(ha); return QLA_ERROR; } /** * qla4xxx_timer - checks every second for work to do. * @ha: Pointer to host adapter structure. **/ static void qla4xxx_timer(struct scsi_qla_host *ha) { struct ddb_entry *ddb_entry, *dtemp; int start_dpc = 0; /* Search for relogin's to time-out and port down retry. */ list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) { /* Count down time between sending relogins */ if (adapter_up(ha) && !test_bit(DF_RELOGIN, &ddb_entry->flags) && atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { if (atomic_read(&ddb_entry->retry_relogin_timer) != INVALID_ENTRY) { if (atomic_read(&ddb_entry->retry_relogin_timer) == 0) { atomic_set(&ddb_entry-> retry_relogin_timer, INVALID_ENTRY); set_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags); set_bit(DF_RELOGIN, &ddb_entry->flags); DEBUG2(printk("scsi%ld: %s: index [%d]" " login device\n", ha->host_no, __func__, ddb_entry->fw_ddb_index)); } else atomic_dec(&ddb_entry-> retry_relogin_timer); } } /* Wait for relogin to timeout */ if (atomic_read(&ddb_entry->relogin_timer) && (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) { /* * If the relogin times out and the device is * still NOT ONLINE then try and relogin again. */ if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE && ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_FAILED) { /* Reset retry relogin timer */ atomic_inc(&ddb_entry->relogin_retry_count); DEBUG2(printk("scsi%ld: index[%d] relogin" " timed out-retrying" " relogin (%d)\n", ha->host_no, ddb_entry->fw_ddb_index, atomic_read(&ddb_entry-> relogin_retry_count)) ); start_dpc++; DEBUG(printk("scsi%ld:%d:%d: index [%d] " "initate relogin after" " %d seconds\n", ha->host_no, ddb_entry->bus, ddb_entry->target, ddb_entry->fw_ddb_index, ddb_entry->default_time2wait + 4) ); atomic_set(&ddb_entry->retry_relogin_timer, ddb_entry->default_time2wait + 4); } } } /* Check for heartbeat interval. */ if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE && ha->heartbeat_interval != 0) { ha->seconds_since_last_heartbeat++; if (ha->seconds_since_last_heartbeat > ha->heartbeat_interval + 2) set_bit(DPC_RESET_HA, &ha->dpc_flags); } /* Wakeup the dpc routine for this adapter, if needed. */ if ((start_dpc || test_bit(DPC_RESET_HA, &ha->dpc_flags) || test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) || test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) || test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) || test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) || test_bit(DPC_AEN, &ha->dpc_flags)) && ha->dpc_thread) { DEBUG2(printk("scsi%ld: %s: scheduling dpc routine" " - dpc flags = 0x%lx\n", ha->host_no, __func__, ha->dpc_flags)); queue_work(ha->dpc_thread, &ha->dpc_work); } /* Reschedule timer thread to call us back in one second */ mod_timer(&ha->timer, jiffies + HZ); DEBUG2(ha->seconds_since_last_intr++); } /** * qla4xxx_cmd_wait - waits for all outstanding commands to complete * @ha: Pointer to host adapter structure. * * This routine stalls the driver until all outstanding commands are returned. * Caller must release the Hardware Lock prior to calling this routine. **/ static int qla4xxx_cmd_wait(struct scsi_qla_host *ha) { uint32_t index = 0; int stat = QLA_SUCCESS; unsigned long flags; struct scsi_cmnd *cmd; int wait_cnt = WAIT_CMD_TOV; /* * Initialized for 30 seconds as we * expect all commands to retuned * ASAP. */ while (wait_cnt) { spin_lock_irqsave(&ha->hardware_lock, flags); /* Find a command that hasn't completed. */ for (index = 0; index < ha->host->can_queue; index++) { cmd = scsi_host_find_tag(ha->host, index); if (cmd != NULL) break; } spin_unlock_irqrestore(&ha->hardware_lock, flags); /* If No Commands are pending, wait is complete */ if (index == ha->host->can_queue) { break; } /* If we timed out on waiting for commands to come back * return ERROR. */ wait_cnt--; if (wait_cnt == 0) stat = QLA_ERROR; else { msleep(1000); } } /* End of While (wait_cnt) */ return stat; } /** * qla4xxx_soft_reset - performs soft reset. * @ha: Pointer to host adapter structure. **/ int qla4xxx_soft_reset(struct scsi_qla_host *ha) { uint32_t max_wait_time; unsigned long flags = 0; int status = QLA_ERROR; uint32_t ctrl_status; spin_lock_irqsave(&ha->hardware_lock, flags); /* * If the SCSI Reset Interrupt bit is set, clear it. * Otherwise, the Soft Reset won't work. */ ctrl_status = readw(&ha->reg->ctrl_status); if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); /* Issue Soft Reset */ writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status); readl(&ha->reg->ctrl_status); spin_unlock_irqrestore(&ha->hardware_lock, flags); /* Wait until the Network Reset Intr bit is cleared */ max_wait_time = RESET_INTR_TOV; do { spin_lock_irqsave(&ha->hardware_lock, flags); ctrl_status = readw(&ha->reg->ctrl_status); spin_unlock_irqrestore(&ha->hardware_lock, flags); if ((ctrl_status & CSR_NET_RESET_INTR) == 0) break; msleep(1000); } while ((--max_wait_time)); if ((ctrl_status & CSR_NET_RESET_INTR) != 0) { DEBUG2(printk(KERN_WARNING "scsi%ld: Network Reset Intr not cleared by " "Network function, clearing it now!\n", ha->host_no)); spin_lock_irqsave(&ha->hardware_lock, flags); writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status); readl(&ha->reg->ctrl_status); spin_unlock_irqrestore(&ha->hardware_lock, flags); } /* Wait until the firmware tells us the Soft Reset is done */ max_wait_time = SOFT_RESET_TOV; do { spin_lock_irqsave(&ha->hardware_lock, flags); ctrl_status = readw(&ha->reg->ctrl_status); spin_unlock_irqrestore(&ha->hardware_lock, flags); if ((ctrl_status & CSR_SOFT_RESET) == 0) { status = QLA_SUCCESS; break; } msleep(1000); } while ((--max_wait_time)); /* * Also, make sure that the SCSI Reset Interrupt bit has been cleared * after the soft reset has taken place. */ spin_lock_irqsave(&ha->hardware_lock, flags); ctrl_status = readw(&ha->reg->ctrl_status); if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) { writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); readl(&ha->reg->ctrl_status); } spin_unlock_irqrestore(&ha->hardware_lock, flags); /* If soft reset fails then most probably the bios on other * function is also enabled. * Since the initialization is sequential the other fn * wont be able to acknowledge the soft reset. * Issue a force soft reset to workaround this scenario. */ if (max_wait_time == 0) { /* Issue Force Soft Reset */ spin_lock_irqsave(&ha->hardware_lock, flags); writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status); readl(&ha->reg->ctrl_status); spin_unlock_irqrestore(&ha->hardware_lock, flags); /* Wait until the firmware tells us the Soft Reset is done */ max_wait_time = SOFT_RESET_TOV; do { spin_lock_irqsave(&ha->hardware_lock, flags); ctrl_status = readw(&ha->reg->ctrl_status); spin_unlock_irqrestore(&ha->hardware_lock, flags); if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) { status = QLA_SUCCESS; break; } msleep(1000); } while ((--max_wait_time)); } return status; } /** * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S. * @ha: Pointer to host adapter structure. * * This routine is called just prior to a HARD RESET to return all * outstanding commands back to the Operating System. * Caller should make sure that the following locks are released * before this calling routine: Hardware lock, and io_request_lock. **/ static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha) { struct srb *srb; int i; unsigned long flags; spin_lock_irqsave(&ha->hardware_lock, flags); for (i = 0; i < ha->host->can_queue; i++) { srb = qla4xxx_del_from_active_array(ha, i); if (srb != NULL) { srb->cmd->result = DID_RESET << 16; qla4xxx_srb_compl(ha, srb); } } spin_unlock_irqrestore(&ha->hardware_lock, flags); } /** * qla4xxx_recover_adapter - recovers adapter after a fatal error * @ha: Pointer to host adapter structure. * @renew_ddb_list: Indicates what to do with the adapter's ddb list * after adapter recovery has completed. * 0=preserve ddb list, 1=destroy and rebuild ddb list **/ static int qla4xxx_recover_adapter(struct scsi_qla_host *ha, uint8_t renew_ddb_list) { int status; /* Stall incoming I/O until we are done */ clear_bit(AF_ONLINE, &ha->flags); DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no, __func__)); /* Wait for outstanding commands to complete. * Stalls the driver for max 30 secs */ status = qla4xxx_cmd_wait(ha); qla4xxx_disable_intrs(ha); /* Flush any pending ddb changed AENs */ qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); /* Reset the firmware. If successful, function * returns with ISP interrupts enabled. */ if (status == QLA_SUCCESS) { DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n", ha->host_no, __func__)); qla4xxx_flush_active_srbs(ha); if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) status = qla4xxx_soft_reset(ha); else status = QLA_ERROR; } /* Flush any pending ddb changed AENs */ qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); /* Re-initialize firmware. If successful, function returns * with ISP interrupts enabled */ if (status == QLA_SUCCESS) { DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n", ha->host_no, __func__)); /* If successful, AF_ONLINE flag set in * qla4xxx_initialize_adapter */ status = qla4xxx_initialize_adapter(ha, renew_ddb_list); } /* Failed adapter initialization? * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */ if ((test_bit(AF_ONLINE, &ha->flags) == 0) && (test_bit(DPC_RESET_HA, &ha->dpc_flags))) { /* Adapter initialization failed, see if we can retry * resetting the ha */ if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) { ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES; DEBUG2(printk("scsi%ld: recover adapter - retrying " "(%d) more times\n", ha->host_no, ha->retry_reset_ha_cnt)); set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); status = QLA_ERROR; } else { if (ha->retry_reset_ha_cnt > 0) { /* Schedule another Reset HA--DPC will retry */ ha->retry_reset_ha_cnt--; DEBUG2(printk("scsi%ld: recover adapter - " "retry remaining %d\n", ha->host_no, ha->retry_reset_ha_cnt)); status = QLA_ERROR; } if (ha->retry_reset_ha_cnt == 0) { /* Recover adapter retries have been exhausted. * Adapter DEAD */ DEBUG2(printk("scsi%ld: recover adapter " "failed - board disabled\n", ha->host_no)); qla4xxx_flush_active_srbs(ha); clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); clear_bit(DPC_RESET_HA, &ha->dpc_flags); clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags); status = QLA_ERROR; } } } else { clear_bit(DPC_RESET_HA, &ha->dpc_flags); clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags); clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); } ha->adapter_error_count++; if (status == QLA_SUCCESS) qla4xxx_enable_intrs(ha); DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no)); return status; } /** * qla4xxx_do_dpc - dpc routine * @data: in our case pointer to adapter structure * * This routine is a task that is schedule by the interrupt handler * to perform the background processing for interrupts. We put it * on a task queue that is consumed whenever the scheduler runs; that's * so you can do anything (i.e. put the process to sleep etc). In fact, * the mid-level tries to sleep when it reaches the driver threshold * "host->can_queue". This can cause a panic if we were in our interrupt code. **/ static void qla4xxx_do_dpc(struct work_struct *work) { struct scsi_qla_host *ha = container_of(work, struct scsi_qla_host, dpc_work); struct ddb_entry *ddb_entry, *dtemp; DEBUG2(printk("scsi%ld: %s: DPC handler waking up." "flags = 0x%08lx, dpc_flags = 0x%08lx\n", ha->host_no, __func__, ha->flags, ha->dpc_flags)); /* Initialization not yet finished. Don't do anything yet. */ if (!test_bit(AF_INIT_DONE, &ha->flags)) return; if (adapter_up(ha) || test_bit(DPC_RESET_HA, &ha->dpc_flags) || test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) { if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) || test_bit(DPC_RESET_HA, &ha->dpc_flags)) qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST); if (test_and_clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) { uint8_t wait_time = RESET_INTR_TOV; unsigned long flags = 0; qla4xxx_flush_active_srbs(ha); spin_lock_irqsave(&ha->hardware_lock, flags); while ((readw(&ha->reg->ctrl_status) & (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) { if (--wait_time == 0) break; spin_unlock_irqrestore(&ha->hardware_lock, flags); msleep(1000); spin_lock_irqsave(&ha->hardware_lock, flags); } spin_unlock_irqrestore(&ha->hardware_lock, flags); if (wait_time == 0) DEBUG2(printk("scsi%ld: %s: SR|FSR " "bit not cleared-- resetting\n", ha->host_no, __func__)); } } /* ---- process AEN? --- */ if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) qla4xxx_process_aen(ha, PROCESS_ALL_AENS); /* ---- Get DHCP IP Address? --- */ if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags)) qla4xxx_get_dhcp_ip_address(ha); /* ---- relogin device? --- */ if (adapter_up(ha) && test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) { list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) { if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) && atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) qla4xxx_relogin_device(ha, ddb_entry); /* * If mbx cmd times out there is no point * in continuing further. * With large no of targets this can hang * the system. */ if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) { printk(KERN_WARNING "scsi%ld: %s: " "need to reset hba\n", ha->host_no, __func__); break; } } } } /** * qla4xxx_free_adapter - release the adapter * @ha: pointer to adapter structure **/ static void qla4xxx_free_adapter(struct scsi_qla_host *ha) { if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) { /* Turn-off interrupts on the card. */ qla4xxx_disable_intrs(ha); } /* Kill the kernel thread for this host */ if (ha->dpc_thread) destroy_workqueue(ha->dpc_thread); /* Issue Soft Reset to put firmware in unknown state */ if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) qla4xxx_soft_reset(ha); /* Remove timer thread, if present */ if (ha->timer_active) qla4xxx_stop_timer(ha); /* free extra memory */ qla4xxx_mem_free(ha); /* Detach interrupts */ if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) free_irq(ha->pdev->irq, ha); pci_disable_device(ha->pdev); } /*** * qla4xxx_iospace_config - maps registers * @ha: pointer to adapter structure * * This routines maps HBA's registers from the pci address space * into the kernel virtual address space for memory mapped i/o. **/ static int qla4xxx_iospace_config(struct scsi_qla_host *ha) { unsigned long pio, pio_len, pio_flags; unsigned long mmio, mmio_len, mmio_flags; pio = pci_resource_start(ha->pdev, 0); pio_len = pci_resource_len(ha->pdev, 0); pio_flags = pci_resource_flags(ha->pdev, 0); if (pio_flags & IORESOURCE_IO) { if (pio_len < MIN_IOBASE_LEN) { dev_warn(&ha->pdev->dev, "Invalid PCI I/O region size\n"); pio = 0; } } else { dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n"); pio = 0; } /* Use MMIO operations for all accesses. */ mmio = pci_resource_start(ha->pdev, 1); mmio_len = pci_resource_len(ha->pdev, 1); mmio_flags = pci_resource_flags(ha->pdev, 1); if (!(mmio_flags & IORESOURCE_MEM)) { dev_err(&ha->pdev->dev, "region #0 not an MMIO resource, aborting\n"); goto iospace_error_exit; } if (mmio_len < MIN_IOBASE_LEN) { dev_err(&ha->pdev->dev, "Invalid PCI mem region size, aborting\n"); goto iospace_error_exit; } if (pci_request_regions(ha->pdev, DRIVER_NAME)) { dev_warn(&ha->pdev->dev, "Failed to reserve PIO/MMIO regions\n"); goto iospace_error_exit; } ha->pio_address = pio; ha->pio_length = pio_len; ha->reg = ioremap(mmio, MIN_IOBASE_LEN); if (!ha->reg) { dev_err(&ha->pdev->dev, "cannot remap MMIO, aborting\n"); goto iospace_error_exit; } return 0; iospace_error_exit: return -ENOMEM; } /** * qla4xxx_probe_adapter - callback function to probe HBA * @pdev: pointer to pci_dev structure * @pci_device_id: pointer to pci_device entry * * This routine will probe for Qlogic 4xxx iSCSI host adapters. * It returns zero if successful. It also initializes all data necessary for * the driver. **/ static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev, const struct pci_device_id *ent) { int ret = -ENODEV, status; struct Scsi_Host *host; struct scsi_qla_host *ha; struct ddb_entry *ddb_entry, *ddbtemp; uint8_t init_retry_count = 0; char buf[34]; if (pci_enable_device(pdev)) return -1; host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha)); if (host == NULL) { printk(KERN_WARNING "qla4xxx: Couldn't allocate host from scsi layer!\n"); goto probe_disable_device; } /* Clear our data area */ ha = (struct scsi_qla_host *) host->hostdata; memset(ha, 0, sizeof(*ha)); /* Save the information from PCI BIOS. */ ha->pdev = pdev; ha->host = host; ha->host_no = host->host_no; /* Configure PCI I/O space. */ ret = qla4xxx_iospace_config(ha); if (ret) goto probe_failed; dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n", pdev->device, pdev->irq, ha->reg); qla4xxx_config_dma_addressing(ha); /* Initialize lists and spinlocks. */ INIT_LIST_HEAD(&ha->ddb_list); INIT_LIST_HEAD(&ha->free_srb_q); mutex_init(&ha->mbox_sem); init_waitqueue_head(&ha->mailbox_wait_queue); spin_lock_init(&ha->hardware_lock); /* Allocate dma buffers */ if (qla4xxx_mem_alloc(ha)) { dev_warn(&ha->pdev->dev, "[ERROR] Failed to allocate memory for adapter\n"); ret = -ENOMEM; goto probe_failed; } /* * Initialize the Host adapter request/response queues and * firmware * NOTE: interrupts enabled upon successful completion */ status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) { DEBUG2(printk("scsi: %s: retrying adapter initialization " "(%d)\n", __func__, init_retry_count)); qla4xxx_soft_reset(ha); status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); } if (status == QLA_ERROR) { dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n"); ret = -ENODEV; goto probe_failed; } host->cmd_per_lun = 3; host->max_channel = 0; host->max_lun = MAX_LUNS - 1; host->max_id = MAX_TARGETS; host->max_cmd_len = IOCB_MAX_CDB_LEN; host->can_queue = MAX_SRBS ; host->transportt = qla4xxx_scsi_transport; ret = scsi_init_shared_tag_map(host, MAX_SRBS); if (ret) { dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed"); goto probe_failed; } /* Startup the kernel thread for this host adapter. */ DEBUG2(printk("scsi: %s: Starting kernel thread for " "qla4xxx_dpc\n", __func__)); sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no); ha->dpc_thread = create_singlethread_workqueue(buf); if (!ha->dpc_thread) { dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n"); ret = -ENODEV; goto probe_failed; } INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc); ret = request_irq(pdev->irq, qla4xxx_intr_handler, SA_INTERRUPT|SA_SHIRQ, "qla4xxx", ha); if (ret) { dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d" " already in use.\n", pdev->irq); goto probe_failed; } set_bit(AF_IRQ_ATTACHED, &ha->flags); host->irq = pdev->irq; DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq)); qla4xxx_enable_intrs(ha); /* Start timer thread. */ qla4xxx_start_timer(ha, qla4xxx_timer, 1); set_bit(AF_INIT_DONE, &ha->flags); pci_set_drvdata(pdev, ha); ret = scsi_add_host(host, &pdev->dev); if (ret) goto probe_failed; /* Update transport device information for all devices. */ list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) { if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) if (qla4xxx_add_sess(ddb_entry)) goto remove_host; } printk(KERN_INFO " QLogic iSCSI HBA Driver version: %s\n" " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n", qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev), ha->host_no, ha->firmware_version[0], ha->firmware_version[1], ha->patch_number, ha->build_number); return 0; remove_host: qla4xxx_free_ddb_list(ha); scsi_remove_host(host); probe_failed: qla4xxx_free_adapter(ha); scsi_host_put(ha->host); probe_disable_device: pci_disable_device(pdev); return ret; } /** * qla4xxx_remove_adapter - calback function to remove adapter. * @pci_dev: PCI device pointer **/ static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev) { struct scsi_qla_host *ha; ha = pci_get_drvdata(pdev); /* remove devs from iscsi_sessions to scsi_devices */ qla4xxx_free_ddb_list(ha); scsi_remove_host(ha->host); qla4xxx_free_adapter(ha); scsi_host_put(ha->host); pci_set_drvdata(pdev, NULL); } /** * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method. * @ha: HA context * * At exit, the @ha's flags.enable_64bit_addressing set to indicated * supported addressing method. */ void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha) { int retval; /* Update our PCI device dma_mask for full 64 bit mask */ if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) { if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) { dev_dbg(&ha->pdev->dev, "Failed to set 64 bit PCI consistent mask; " "using 32 bit.\n"); retval = pci_set_consistent_dma_mask(ha->pdev, DMA_32BIT_MASK); } } else retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK); } static int qla4xxx_slave_alloc(struct scsi_device *sdev) { struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target); struct ddb_entry *ddb = sess->dd_data; sdev->hostdata = ddb; sdev->tagged_supported = 1; scsi_activate_tcq(sdev, sdev->host->can_queue); return 0; } static int qla4xxx_slave_configure(struct scsi_device *sdev) { sdev->tagged_supported = 1; return 0; } static void qla4xxx_slave_destroy(struct scsi_device *sdev) { scsi_deactivate_tcq(sdev, 1); } /** * qla4xxx_del_from_active_array - returns an active srb * @ha: Pointer to host adapter structure. * @index: index into to the active_array * * This routine removes and returns the srb at the specified index **/ struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index) { struct srb *srb = NULL; struct scsi_cmnd *cmd; if (!(cmd = scsi_host_find_tag(ha->host, index))) return srb; if (!(srb = (struct srb *)cmd->host_scribble)) return srb; /* update counters */ if (srb->flags & SRB_DMA_VALID) { ha->req_q_count += srb->iocb_cnt; ha->iocb_cnt -= srb->iocb_cnt; if (srb->cmd) srb->cmd->host_scribble = NULL; } return srb; } /** * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware * @ha: actual ha whose done queue will contain the comd returned by firmware. * @cmd: Scsi Command to wait on. * * This routine waits for the command to be returned by the Firmware * for some max time. **/ static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha, struct scsi_cmnd *cmd) { int done = 0; struct srb *rp; uint32_t max_wait_time = EH_WAIT_CMD_TOV; do { /* Checking to see if its returned to OS */ rp = (struct srb *) cmd->SCp.ptr; if (rp == NULL) { done++; break; } msleep(2000); } while (max_wait_time--); return done; } /** * qla4xxx_wait_for_hba_online - waits for HBA to come online * @ha: Pointer to host adapter structure **/ static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha) { unsigned long wait_online; wait_online = jiffies + (30 * HZ); while (time_before(jiffies, wait_online)) { if (adapter_up(ha)) return QLA_SUCCESS; else if (ha->retry_reset_ha_cnt == 0) return QLA_ERROR; msleep(2000); } return QLA_ERROR; } /** * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish. * @ha: pointer to to HBA * @t: target id * @l: lun id * * This function waits for all outstanding commands to a lun to complete. It * returns 0 if all pending commands are returned and 1 otherwise. **/ static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha, int t, int l) { int cnt; int status = 0; struct scsi_cmnd *cmd; /* * Waiting for all commands for the designated target in the active * array */ for (cnt = 0; cnt < ha->host->can_queue; cnt++) { cmd = scsi_host_find_tag(ha->host, cnt); if (cmd && cmd->device->id == t && cmd->device->lun == l) { if (!qla4xxx_eh_wait_on_command(ha, cmd)) { status++; break; } } } return status; } /** * qla4xxx_eh_device_reset - callback for target reset. * @cmd: Pointer to Linux's SCSI command structure * * This routine is called by the Linux OS to reset all luns on the * specified target. **/ static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd) { struct scsi_qla_host *ha = to_qla_host(cmd->device->host); struct ddb_entry *ddb_entry = cmd->device->hostdata; struct srb *sp; int ret = FAILED, stat; sp = (struct srb *) cmd->SCp.ptr; if (!sp || !ddb_entry) return ret; dev_info(&ha->pdev->dev, "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no, cmd->device->channel, cmd->device->id, cmd->device->lun); DEBUG2(printk(KERN_INFO "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x," "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no, cmd, jiffies, cmd->timeout_per_command / HZ, ha->dpc_flags, cmd->result, cmd->allowed)); /* FIXME: wait for hba to go online */ stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun); if (stat != QLA_SUCCESS) { dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat); goto eh_dev_reset_done; } /* Send marker. */ ha->marker_needed = 1; /* * If we are coming down the EH path, wait for all commands to complete * for the device. */ if (cmd->device->host->shost_state == SHOST_RECOVERY) { if (qla4xxx_eh_wait_for_active_target_commands(ha, cmd->device->id, cmd->device->lun)){ dev_info(&ha->pdev->dev, "DEVICE RESET FAILED - waiting for " "commands.\n"); goto eh_dev_reset_done; } } dev_info(&ha->pdev->dev, "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no, cmd->device->channel, cmd->device->id, cmd->device->lun); ret = SUCCESS; eh_dev_reset_done: return ret; } /** * qla4xxx_eh_host_reset - kernel callback * @cmd: Pointer to Linux's SCSI command structure * * This routine is invoked by the Linux kernel to perform fatal error * recovery on the specified adapter. **/ static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd) { int return_status = FAILED; struct scsi_qla_host *ha; ha = (struct scsi_qla_host *) cmd->device->host->hostdata; dev_info(&ha->pdev->dev, "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, cmd->device->channel, cmd->device->id, cmd->device->lun); if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) { DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter " "DEAD.\n", ha->host_no, cmd->device->channel, __func__)); return FAILED; } if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) { return_status = SUCCESS; } dev_info(&ha->pdev->dev, "HOST RESET %s.\n", return_status == FAILED ? "FAILED" : "SUCCEDED"); return return_status; } static struct pci_device_id qla4xxx_pci_tbl[] = { { .vendor = PCI_VENDOR_ID_QLOGIC, .device = PCI_DEVICE_ID_QLOGIC_ISP4010, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, }, { .vendor = PCI_VENDOR_ID_QLOGIC, .device = PCI_DEVICE_ID_QLOGIC_ISP4022, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, }, { .vendor = PCI_VENDOR_ID_QLOGIC, .device = PCI_DEVICE_ID_QLOGIC_ISP4032, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, }, {0, 0}, }; MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl); struct pci_driver qla4xxx_pci_driver = { .name = DRIVER_NAME, .id_table = qla4xxx_pci_tbl, .probe = qla4xxx_probe_adapter, .remove = qla4xxx_remove_adapter, }; static int __init qla4xxx_module_init(void) { int ret; /* Allocate cache for SRBs. */ srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0, SLAB_HWCACHE_ALIGN, NULL, NULL); if (srb_cachep == NULL) { printk(KERN_ERR "%s: Unable to allocate SRB cache..." "Failing load!\n", DRIVER_NAME); ret = -ENOMEM; goto no_srp_cache; } /* Derive version string. */ strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION); if (ql4xextended_error_logging) strcat(qla4xxx_version_str, "-debug"); qla4xxx_scsi_transport = iscsi_register_transport(&qla4xxx_iscsi_transport); if (!qla4xxx_scsi_transport){ ret = -ENODEV; goto release_srb_cache; } ret = pci_register_driver(&qla4xxx_pci_driver); if (ret) goto unregister_transport; printk(KERN_INFO "QLogic iSCSI HBA Driver\n"); return 0; unregister_transport: iscsi_unregister_transport(&qla4xxx_iscsi_transport); release_srb_cache: kmem_cache_destroy(srb_cachep); no_srp_cache: return ret; } static void __exit qla4xxx_module_exit(void) { pci_unregister_driver(&qla4xxx_pci_driver); iscsi_unregister_transport(&qla4xxx_iscsi_transport); kmem_cache_destroy(srb_cachep); } module_init(qla4xxx_module_init); module_exit(qla4xxx_module_exit); MODULE_AUTHOR("QLogic Corporation"); MODULE_DESCRIPTION("QLogic iSCSI HBA Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(QLA4XXX_DRIVER_VERSION);