unsigned long timeout)
{
u64 *crq_as_u64 = (u64 *) &evt_struct->crq;
- int request_status;
+ int request_status = 0;
int rc;
/* If we have exhausted our request limit, just fail this request,
if (request_status < -1)
goto send_error;
/* Otherwise, we may have run out of requests. */
+ /* If request limit was 0 when we started the adapter is in the
+ * process of performing a login with the server adapter, or
+ * we may have run out of requests.
+ */
+ else if (request_status == -1 &&
+ evt_struct->iu.srp.login_req.opcode != SRP_LOGIN_REQ)
+ goto send_busy;
/* Abort and reset calls should make it through.
* Nothing except abort and reset should use the last two
* slots unless we had two or less to begin with.
list_del(&evt_struct->list);
del_timer(&evt_struct->timer);
+ /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY.
+ * Firmware will send a CRQ with a transport event (0xFF) to
+ * tell this client what has happened to the transport. This
+ * will be handled in ibmvscsi_handle_crq()
+ */
+ if (rc == H_CLOSED) {
+ dev_warn(hostdata->dev, "send warning. "
+ "Receive queue closed, will retry.\n");
+ goto send_busy;
+ }
dev_err(hostdata->dev, "send error %d\n", rc);
atomic_inc(&hostdata->request_limit);
goto send_error;
unmap_cmd_data(&evt_struct->iu.srp.cmd, evt_struct, hostdata->dev);
free_event_struct(&hostdata->pool, evt_struct);
- atomic_inc(&hostdata->request_limit);
+ if (request_status != -1)
+ atomic_inc(&hostdata->request_limit);
return SCSI_MLQUEUE_HOST_BUSY;
send_error:
login->req_buf_fmt = SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT;
spin_lock_irqsave(hostdata->host->host_lock, flags);
- /* Start out with a request limit of 1, since this is negotiated in
- * the login request we are just sending
+ /* Start out with a request limit of 0, since this is negotiated in
+ * the login request we are just sending and login requests always
+ * get sent by the driver regardless of request_limit.
*/
- atomic_set(&hostdata->request_limit, 1);
+ atomic_set(&hostdata->request_limit, 0);
rc = ibmvscsi_send_srp_event(evt_struct, hostdata, init_timeout * 2);
spin_unlock_irqrestore(hostdata->host->host_lock, flags);
int rsp_rc;
unsigned long flags;
u16 lun = lun_from_dev(cmd->device);
+ unsigned long wait_switch = 0;
/* First, find this command in our sent list so we can figure
* out the correct tag
*/
spin_lock_irqsave(hostdata->host->host_lock, flags);
- found_evt = NULL;
- list_for_each_entry(tmp_evt, &hostdata->sent, list) {
- if (tmp_evt->cmnd == cmd) {
- found_evt = tmp_evt;
- break;
+ wait_switch = jiffies + (init_timeout * HZ);
+ do {
+ found_evt = NULL;
+ list_for_each_entry(tmp_evt, &hostdata->sent, list) {
+ if (tmp_evt->cmnd == cmd) {
+ found_evt = tmp_evt;
+ break;
+ }
}
- }
- if (!found_evt) {
- spin_unlock_irqrestore(hostdata->host->host_lock, flags);
- return SUCCESS;
- }
+ if (!found_evt) {
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
+ return SUCCESS;
+ }
- evt = get_event_struct(&hostdata->pool);
- if (evt == NULL) {
- spin_unlock_irqrestore(hostdata->host->host_lock, flags);
- sdev_printk(KERN_ERR, cmd->device, "failed to allocate abort event\n");
- return FAILED;
- }
+ evt = get_event_struct(&hostdata->pool);
+ if (evt == NULL) {
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
+ sdev_printk(KERN_ERR, cmd->device,
+ "failed to allocate abort event\n");
+ return FAILED;
+ }
- init_event_struct(evt,
- sync_completion,
- VIOSRP_SRP_FORMAT,
- init_timeout);
+ init_event_struct(evt,
+ sync_completion,
+ VIOSRP_SRP_FORMAT,
+ init_timeout);
- tsk_mgmt = &evt->iu.srp.tsk_mgmt;
+ tsk_mgmt = &evt->iu.srp.tsk_mgmt;
- /* Set up an abort SRP command */
- memset(tsk_mgmt, 0x00, sizeof(*tsk_mgmt));
- tsk_mgmt->opcode = SRP_TSK_MGMT;
- tsk_mgmt->lun = ((u64) lun) << 48;
- tsk_mgmt->tsk_mgmt_func = SRP_TSK_ABORT_TASK;
- tsk_mgmt->task_tag = (u64) found_evt;
-
- sdev_printk(KERN_INFO, cmd->device, "aborting command. lun 0x%lx, tag 0x%lx\n",
- tsk_mgmt->lun, tsk_mgmt->task_tag);
-
- evt->sync_srp = &srp_rsp;
- init_completion(&evt->comp);
- rsp_rc = ibmvscsi_send_srp_event(evt, hostdata, init_timeout * 2);
+ /* Set up an abort SRP command */
+ memset(tsk_mgmt, 0x00, sizeof(*tsk_mgmt));
+ tsk_mgmt->opcode = SRP_TSK_MGMT;
+ tsk_mgmt->lun = ((u64) lun) << 48;
+ tsk_mgmt->tsk_mgmt_func = SRP_TSK_ABORT_TASK;
+ tsk_mgmt->task_tag = (u64) found_evt;
+
+ evt->sync_srp = &srp_rsp;
+
+ init_completion(&evt->comp);
+ rsp_rc = ibmvscsi_send_srp_event(evt, hostdata, init_timeout * 2);
+
+ if (rsp_rc != SCSI_MLQUEUE_HOST_BUSY)
+ break;
+
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
+ msleep(10);
+ spin_lock_irqsave(hostdata->host->host_lock, flags);
+ } while (time_before(jiffies, wait_switch));
+
spin_unlock_irqrestore(hostdata->host->host_lock, flags);
+
if (rsp_rc != 0) {
sdev_printk(KERN_ERR, cmd->device,
"failed to send abort() event. rc=%d\n", rsp_rc);
return FAILED;
}
+ sdev_printk(KERN_INFO, cmd->device,
+ "aborting command. lun 0x%lx, tag 0x%lx\n",
+ (((u64) lun) << 48), (u64) found_evt);
+
wait_for_completion(&evt->comp);
/* make sure we got a good response */
int rsp_rc;
unsigned long flags;
u16 lun = lun_from_dev(cmd->device);
+ unsigned long wait_switch = 0;
spin_lock_irqsave(hostdata->host->host_lock, flags);
- evt = get_event_struct(&hostdata->pool);
- if (evt == NULL) {
- spin_unlock_irqrestore(hostdata->host->host_lock, flags);
- sdev_printk(KERN_ERR, cmd->device, "failed to allocate reset event\n");
- return FAILED;
- }
+ wait_switch = jiffies + (init_timeout * HZ);
+ do {
+ evt = get_event_struct(&hostdata->pool);
+ if (evt == NULL) {
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
+ sdev_printk(KERN_ERR, cmd->device,
+ "failed to allocate reset event\n");
+ return FAILED;
+ }
- init_event_struct(evt,
- sync_completion,
- VIOSRP_SRP_FORMAT,
- init_timeout);
+ init_event_struct(evt,
+ sync_completion,
+ VIOSRP_SRP_FORMAT,
+ init_timeout);
- tsk_mgmt = &evt->iu.srp.tsk_mgmt;
+ tsk_mgmt = &evt->iu.srp.tsk_mgmt;
- /* Set up a lun reset SRP command */
- memset(tsk_mgmt, 0x00, sizeof(*tsk_mgmt));
- tsk_mgmt->opcode = SRP_TSK_MGMT;
- tsk_mgmt->lun = ((u64) lun) << 48;
- tsk_mgmt->tsk_mgmt_func = SRP_TSK_LUN_RESET;
+ /* Set up a lun reset SRP command */
+ memset(tsk_mgmt, 0x00, sizeof(*tsk_mgmt));
+ tsk_mgmt->opcode = SRP_TSK_MGMT;
+ tsk_mgmt->lun = ((u64) lun) << 48;
+ tsk_mgmt->tsk_mgmt_func = SRP_TSK_LUN_RESET;
- sdev_printk(KERN_INFO, cmd->device, "resetting device. lun 0x%lx\n",
- tsk_mgmt->lun);
+ evt->sync_srp = &srp_rsp;
+
+ init_completion(&evt->comp);
+ rsp_rc = ibmvscsi_send_srp_event(evt, hostdata, init_timeout * 2);
+
+ if (rsp_rc != SCSI_MLQUEUE_HOST_BUSY)
+ break;
+
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
+ msleep(10);
+ spin_lock_irqsave(hostdata->host->host_lock, flags);
+ } while (time_before(jiffies, wait_switch));
- evt->sync_srp = &srp_rsp;
- init_completion(&evt->comp);
- rsp_rc = ibmvscsi_send_srp_event(evt, hostdata, init_timeout * 2);
spin_unlock_irqrestore(hostdata->host->host_lock, flags);
+
if (rsp_rc != 0) {
sdev_printk(KERN_ERR, cmd->device,
"failed to send reset event. rc=%d\n", rsp_rc);
return FAILED;
}
+ sdev_printk(KERN_INFO, cmd->device, "resetting device. lun 0x%lx\n",
+ (((u64) lun) << 48));
+
wait_for_completion(&evt->comp);
/* make sure we got a good response */
unsigned long lock_flags = 0;
spin_lock_irqsave(shost->host_lock, lock_flags);
- if (sdev->type == TYPE_DISK)
+ if (sdev->type == TYPE_DISK) {
sdev->allow_restart = 1;
+ sdev->timeout = 60 * HZ;
+ }
scsi_adjust_queue_depth(sdev, 0, shost->cmd_per_lun);
spin_unlock_irqrestore(shost->host_lock, lock_flags);
return 0;
projects / linux-2.6-omap-h63xx.git / blobdiff