--- /dev/null
+/*
+ * QLogic iSCSI HBA Driver
+ * Copyright (c) 2003-2006 QLogic Corporation
+ *
+ * See LICENSE.qla4xxx for copyright and licensing details.
+ */
+#include <linux/moduleparam.h>
+
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsicam.h>
+
+#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");
+
+int ql4_mod_unload = 0;
+
+/*
+ * 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;
+ }
+
+ if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
+ 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;
+}
+
+static void qla4xxx_hw_reset(struct scsi_qla_host *ha)
+{
+ uint32_t ctrl_status;
+ unsigned long flags = 0;
+
+ DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
+
+ 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);
+}
+
+/**
+ * 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;
+
+ qla4xxx_hw_reset(ha);
+
+ /* 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;
+ int status = QLA_ERROR;
+
+ DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
+ "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
+ ha->host_no, __func__, ha->flags, ha->dpc_flags,
+ readw(&ha->reg->ctrl_status)));
+
+ /* 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_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
+ uint8_t wait_time = RESET_INTR_TOV;
+
+ while ((readw(&ha->reg->ctrl_status) &
+ (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
+ if (--wait_time == 0)
+ break;
+ msleep(1000);
+ }
+ if (wait_time == 0)
+ DEBUG2(printk("scsi%ld: %s: SR|FSR "
+ "bit not cleared-- resetting\n",
+ ha->host_no, __func__));
+ qla4xxx_flush_active_srbs(ha);
+ if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
+ qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
+ status = qla4xxx_initialize_adapter(ha,
+ PRESERVE_DDB_LIST);
+ }
+ clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
+ if (status == QLA_SUCCESS)
+ qla4xxx_enable_intrs(ha);
+ }
+ }
+
+ /* ---- 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_hw_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);
+
+ 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)
+{
+ ql4_mod_unload = 1;
+ 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);
git://git.onelab.eu / linux-2.6.git / blobdiff