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path: root/drivers/scsi/ibmvscsi/ibmvfc.c
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Diffstat (limited to 'drivers/scsi/ibmvscsi/ibmvfc.c')
-rw-r--r--drivers/scsi/ibmvscsi/ibmvfc.c85
1 files changed, 58 insertions, 27 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index fef49521cbc3..bd96cecaa619 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -504,12 +504,23 @@ static void ibmvfc_set_host_action(struct ibmvfc_host *vhost,
if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS)
vhost->action = action;
break;
- case IBMVFC_HOST_ACTION_LOGO:
case IBMVFC_HOST_ACTION_INIT:
case IBMVFC_HOST_ACTION_TGT_DEL:
+ switch (vhost->action) {
+ case IBMVFC_HOST_ACTION_RESET:
+ case IBMVFC_HOST_ACTION_REENABLE:
+ break;
+ default:
+ vhost->action = action;
+ break;
+ };
+ break;
+ case IBMVFC_HOST_ACTION_LOGO:
case IBMVFC_HOST_ACTION_QUERY_TGTS:
case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
case IBMVFC_HOST_ACTION_NONE:
+ case IBMVFC_HOST_ACTION_RESET:
+ case IBMVFC_HOST_ACTION_REENABLE:
default:
vhost->action = action;
break;
@@ -641,7 +652,7 @@ static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost)
**/
static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
{
- long rc;
+ long rc = 0;
struct vio_dev *vdev = to_vio_dev(vhost->dev);
struct ibmvfc_crq_queue *crq = &vhost->crq;
@@ -649,6 +660,8 @@ static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
free_irq(vdev->irq, vhost);
tasklet_kill(&vhost->tasklet);
do {
+ if (rc)
+ msleep(100);
rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
@@ -667,11 +680,13 @@ static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost)
**/
static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
{
- int rc;
+ int rc = 0;
struct vio_dev *vdev = to_vio_dev(vhost->dev);
/* Re-enable the CRQ */
do {
+ if (rc)
+ msleep(100);
rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
} while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
@@ -690,15 +705,19 @@ static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost)
**/
static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
{
- int rc;
+ int rc = 0;
+ unsigned long flags;
struct vio_dev *vdev = to_vio_dev(vhost->dev);
struct ibmvfc_crq_queue *crq = &vhost->crq;
/* Close the CRQ */
do {
+ if (rc)
+ msleep(100);
rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+ spin_lock_irqsave(vhost->host->host_lock, flags);
vhost->state = IBMVFC_NO_CRQ;
vhost->logged_in = 0;
ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE);
@@ -716,6 +735,7 @@ static int ibmvfc_reset_crq(struct ibmvfc_host *vhost)
dev_warn(vhost->dev, "Partner adapter not ready\n");
else if (rc != 0)
dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc);
+ spin_unlock_irqrestore(vhost->host->host_lock, flags);
return rc;
}
@@ -821,17 +841,9 @@ static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code)
**/
static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost)
{
- int rc;
-
- scsi_block_requests(vhost->host);
ibmvfc_purge_requests(vhost, DID_ERROR);
- if ((rc = ibmvfc_reset_crq(vhost)) ||
- (rc = ibmvfc_send_crq_init(vhost)) ||
- (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
- dev_err(vhost->dev, "Error after reset rc=%d\n", rc);
- ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
- } else
- ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+ ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+ ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
}
/**
@@ -2299,6 +2311,7 @@ static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
int rc = FAILED;
ENTER;
+ fc_block_scsi_eh(cmd);
ibmvfc_wait_while_resetting(vhost);
cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
abort_rc = ibmvfc_abort_task_set(sdev);
@@ -2325,6 +2338,7 @@ static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
int rc = FAILED;
ENTER;
+ fc_block_scsi_eh(cmd);
ibmvfc_wait_while_resetting(vhost);
cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
@@ -2389,6 +2403,7 @@ static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
unsigned long cancel_rc = 0;
ENTER;
+ fc_block_scsi_eh(cmd);
ibmvfc_wait_while_resetting(vhost);
starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
@@ -2410,6 +2425,7 @@ static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd)
int rc;
struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
+ fc_block_scsi_eh(cmd);
dev_err(vhost->dev, "Resetting connection due to error recovery\n");
rc = ibmvfc_issue_fc_host_lip(vhost->host);
return rc ? FAILED : SUCCESS;
@@ -2606,22 +2622,13 @@ static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost)
dev_info(vhost->dev, "Re-enabling adapter\n");
vhost->client_migrated = 1;
ibmvfc_purge_requests(vhost, DID_REQUEUE);
- if ((rc = ibmvfc_reenable_crq_queue(vhost)) ||
- (rc = ibmvfc_send_crq_init(vhost))) {
- ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
- dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc);
- } else
- ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+ ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+ ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE);
} else {
dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format);
-
ibmvfc_purge_requests(vhost, DID_ERROR);
- if ((rc = ibmvfc_reset_crq(vhost)) ||
- (rc = ibmvfc_send_crq_init(vhost))) {
- ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
- dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc);
- } else
- ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+ ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN);
+ ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET);
}
return;
case IBMVFC_CRQ_CMD_RSP:
@@ -4123,6 +4130,8 @@ static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost)
case IBMVFC_HOST_ACTION_TGT_DEL:
case IBMVFC_HOST_ACTION_TGT_DEL_FAILED:
case IBMVFC_HOST_ACTION_QUERY:
+ case IBMVFC_HOST_ACTION_RESET:
+ case IBMVFC_HOST_ACTION_REENABLE:
default:
break;
};
@@ -4220,6 +4229,7 @@ static void ibmvfc_do_work(struct ibmvfc_host *vhost)
struct ibmvfc_target *tgt;
unsigned long flags;
struct fc_rport *rport;
+ int rc;
ibmvfc_log_ae(vhost, vhost->events_to_log);
spin_lock_irqsave(vhost->host->host_lock, flags);
@@ -4229,6 +4239,27 @@ static void ibmvfc_do_work(struct ibmvfc_host *vhost)
case IBMVFC_HOST_ACTION_LOGO_WAIT:
case IBMVFC_HOST_ACTION_INIT_WAIT:
break;
+ case IBMVFC_HOST_ACTION_RESET:
+ vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
+ spin_unlock_irqrestore(vhost->host->host_lock, flags);
+ rc = ibmvfc_reset_crq(vhost);
+ spin_lock_irqsave(vhost->host->host_lock, flags);
+ if (rc || (rc = ibmvfc_send_crq_init(vhost)) ||
+ (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) {
+ ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+ dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc);
+ }
+ break;
+ case IBMVFC_HOST_ACTION_REENABLE:
+ vhost->action = IBMVFC_HOST_ACTION_TGT_DEL;
+ spin_unlock_irqrestore(vhost->host->host_lock, flags);
+ rc = ibmvfc_reenable_crq_queue(vhost);
+ spin_lock_irqsave(vhost->host->host_lock, flags);
+ if (rc || (rc = ibmvfc_send_crq_init(vhost))) {
+ ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD);
+ dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc);
+ }
+ break;
case IBMVFC_HOST_ACTION_LOGO:
vhost->job_step(vhost);
break;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.