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-rw-r--r--drivers/scsi/ibmvscsi/ibmvfc.c207
-rw-r--r--drivers/scsi/ibmvscsi/ibmvfc.h2
2 files changed, 148 insertions, 61 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index ae65fa60eeb4..af69c0738edb 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -758,6 +758,9 @@ static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt)
cmnd->scsi_done(cmnd);
}
+ if (evt->eh_comp)
+ complete(evt->eh_comp);
+
ibmvfc_free_event(evt);
}
@@ -1245,6 +1248,7 @@ static void ibmvfc_init_event(struct ibmvfc_event *evt,
evt->sync_iu = NULL;
evt->crq.format = format;
evt->done = done;
+ evt->eh_comp = NULL;
}
/**
@@ -1485,6 +1489,9 @@ static void ibmvfc_scsi_done(struct ibmvfc_event *evt)
cmnd->scsi_done(cmnd);
}
+ if (evt->eh_comp)
+ complete(evt->eh_comp);
+
ibmvfc_free_event(evt);
}
@@ -1785,7 +1792,8 @@ static int ibmvfc_abort_task_set(struct scsi_device *sdev)
static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
{
struct ibmvfc_host *vhost = shost_priv(sdev->host);
- struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
+ struct scsi_target *starget = scsi_target(sdev);
+ struct fc_rport *rport = starget_to_rport(starget);
struct ibmvfc_tmf *tmf;
struct ibmvfc_event *evt, *found_evt;
union ibmvfc_iu rsp;
@@ -1823,7 +1831,7 @@ static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
int_to_scsilun(sdev->lun, &tmf->lun);
tmf->flags = (type | IBMVFC_TMF_LUA_VALID);
tmf->cancel_key = (unsigned long)sdev->hostdata;
- tmf->my_cancel_key = (IBMVFC_TMF_CANCEL_KEY | (unsigned long)sdev->hostdata);
+ tmf->my_cancel_key = (unsigned long)starget->hostdata;
evt->sync_iu = &rsp;
init_completion(&evt->comp);
@@ -1855,6 +1863,91 @@ static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
}
/**
+ * ibmvfc_match_target - Match function for specified target
+ * @evt: ibmvfc event struct
+ * @device: device to match (starget)
+ *
+ * Returns:
+ * 1 if event matches starget / 0 if event does not match starget
+ **/
+static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device)
+{
+ if (evt->cmnd && scsi_target(evt->cmnd->device) == device)
+ return 1;
+ return 0;
+}
+
+/**
+ * ibmvfc_match_lun - Match function for specified LUN
+ * @evt: ibmvfc event struct
+ * @device: device to match (sdev)
+ *
+ * Returns:
+ * 1 if event matches sdev / 0 if event does not match sdev
+ **/
+static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device)
+{
+ if (evt->cmnd && evt->cmnd->device == device)
+ return 1;
+ return 0;
+}
+
+/**
+ * ibmvfc_wait_for_ops - Wait for ops to complete
+ * @vhost: ibmvfc host struct
+ * @device: device to match (starget or sdev)
+ * @match: match function
+ *
+ * Returns:
+ * SUCCESS / FAILED
+ **/
+static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device,
+ int (*match) (struct ibmvfc_event *, void *))
+{
+ struct ibmvfc_event *evt;
+ DECLARE_COMPLETION_ONSTACK(comp);
+ int wait;
+ unsigned long flags;
+ signed long timeout = init_timeout * HZ;
+
+ ENTER;
+ do {
+ wait = 0;
+ spin_lock_irqsave(vhost->host->host_lock, flags);
+ list_for_each_entry(evt, &vhost->sent, queue) {
+ if (match(evt, device)) {
+ evt->eh_comp = ∁
+ wait++;
+ }
+ }
+ spin_unlock_irqrestore(vhost->host->host_lock, flags);
+
+ if (wait) {
+ timeout = wait_for_completion_timeout(&comp, timeout);
+
+ if (!timeout) {
+ wait = 0;
+ spin_lock_irqsave(vhost->host->host_lock, flags);
+ list_for_each_entry(evt, &vhost->sent, queue) {
+ if (match(evt, device)) {
+ evt->eh_comp = NULL;
+ wait++;
+ }
+ }
+ spin_unlock_irqrestore(vhost->host->host_lock, flags);
+ if (wait)
+ dev_err(vhost->dev, "Timed out waiting for aborted commands\n");
+ LEAVE;
+ return wait ? FAILED : SUCCESS;
+ }
+ }
+ } while (wait);
+
+ LEAVE;
+ return SUCCESS;
+}
+
+/**
* ibmvfc_eh_abort_handler - Abort a command
* @cmd: scsi command to abort
*
@@ -1863,29 +1956,21 @@ static int ibmvfc_cancel_all(struct scsi_device *sdev, int type)
**/
static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
{
- struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
- struct ibmvfc_event *evt, *pos;
+ struct scsi_device *sdev = cmd->device;
+ struct ibmvfc_host *vhost = shost_priv(sdev->host);
int cancel_rc, abort_rc;
- unsigned long flags;
+ int rc = FAILED;
ENTER;
ibmvfc_wait_while_resetting(vhost);
- cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_ABORT_TASK_SET);
- abort_rc = ibmvfc_abort_task_set(cmd->device);
+ cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET);
+ abort_rc = ibmvfc_abort_task_set(sdev);
- if (!cancel_rc && !abort_rc) {
- spin_lock_irqsave(vhost->host->host_lock, flags);
- list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
- if (evt->cmnd && evt->cmnd->device == cmd->device)
- ibmvfc_fail_request(evt, DID_ABORT);
- }
- spin_unlock_irqrestore(vhost->host->host_lock, flags);
- LEAVE;
- return SUCCESS;
- }
+ if (!cancel_rc && !abort_rc)
+ rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
LEAVE;
- return FAILED;
+ return rc;
}
/**
@@ -1897,29 +1982,21 @@ static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd)
**/
static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd)
{
- struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
- struct ibmvfc_event *evt, *pos;
+ struct scsi_device *sdev = cmd->device;
+ struct ibmvfc_host *vhost = shost_priv(sdev->host);
int cancel_rc, reset_rc;
- unsigned long flags;
+ int rc = FAILED;
ENTER;
ibmvfc_wait_while_resetting(vhost);
- cancel_rc = ibmvfc_cancel_all(cmd->device, IBMVFC_TMF_LUN_RESET);
- reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_LUN_RESET, "LUN");
+ cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET);
+ reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN");
- if (!cancel_rc && !reset_rc) {
- spin_lock_irqsave(vhost->host->host_lock, flags);
- list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
- if (evt->cmnd && evt->cmnd->device == cmd->device)
- ibmvfc_fail_request(evt, DID_ABORT);
- }
- spin_unlock_irqrestore(vhost->host->host_lock, flags);
- LEAVE;
- return SUCCESS;
- }
+ if (!cancel_rc && !reset_rc)
+ rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun);
LEAVE;
- return FAILED;
+ return rc;
}
/**
@@ -1955,31 +2032,23 @@ static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data)
**/
static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
{
- struct ibmvfc_host *vhost = shost_priv(cmd->device->host);
- struct scsi_target *starget = scsi_target(cmd->device);
- struct ibmvfc_event *evt, *pos;
+ struct scsi_device *sdev = cmd->device;
+ struct ibmvfc_host *vhost = shost_priv(sdev->host);
+ struct scsi_target *starget = scsi_target(sdev);
int reset_rc;
+ int rc = FAILED;
unsigned long cancel_rc = 0;
- unsigned long flags;
ENTER;
ibmvfc_wait_while_resetting(vhost);
starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
- reset_rc = ibmvfc_reset_device(cmd->device, IBMVFC_TARGET_RESET, "target");
+ reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
- if (!cancel_rc && !reset_rc) {
- spin_lock_irqsave(vhost->host->host_lock, flags);
- list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
- if (evt->cmnd && scsi_target(evt->cmnd->device) == starget)
- ibmvfc_fail_request(evt, DID_ABORT);
- }
- spin_unlock_irqrestore(vhost->host->host_lock, flags);
- LEAVE;
- return SUCCESS;
- }
+ if (!cancel_rc && !reset_rc)
+ rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
LEAVE;
- return FAILED;
+ return rc;
}
/**
@@ -2009,23 +2078,18 @@ static void ibmvfc_terminate_rport_io(struct fc_rport *rport)
struct scsi_target *starget = to_scsi_target(&rport->dev);
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
struct ibmvfc_host *vhost = shost_priv(shost);
- struct ibmvfc_event *evt, *pos;
unsigned long cancel_rc = 0;
unsigned long abort_rc = 0;
- unsigned long flags;
+ int rc = FAILED;
ENTER;
starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all);
starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all);
- if (!cancel_rc && !abort_rc) {
- spin_lock_irqsave(shost->host_lock, flags);
- list_for_each_entry_safe(evt, pos, &vhost->sent, queue) {
- if (evt->cmnd && scsi_target(evt->cmnd->device) == starget)
- ibmvfc_fail_request(evt, DID_ABORT);
- }
- spin_unlock_irqrestore(shost->host_lock, flags);
- } else
+ if (!cancel_rc && !abort_rc)
+ rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
+
+ if (rc == FAILED)
ibmvfc_issue_fc_host_lip(shost);
LEAVE;
}
@@ -2259,6 +2323,28 @@ static int ibmvfc_slave_alloc(struct scsi_device *sdev)
}
/**
+ * ibmvfc_target_alloc - Setup the target's task set value
+ * @starget: struct scsi_target
+ *
+ * Set the target's task set value so that error handling works as
+ * expected.
+ *
+ * Returns:
+ * 0 on success / -ENXIO if device does not exist
+ **/
+static int ibmvfc_target_alloc(struct scsi_target *starget)
+{
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ struct ibmvfc_host *vhost = shost_priv(shost);
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ starget->hostdata = (void *)(unsigned long)vhost->task_set++;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return 0;
+}
+
+/**
* ibmvfc_slave_configure - Configure the device
* @sdev: struct scsi_device device to configure
*
@@ -2537,6 +2623,7 @@ static struct scsi_host_template driver_template = {
.eh_host_reset_handler = ibmvfc_eh_host_reset_handler,
.slave_alloc = ibmvfc_slave_alloc,
.slave_configure = ibmvfc_slave_configure,
+ .target_alloc = ibmvfc_target_alloc,
.scan_finished = ibmvfc_scan_finished,
.change_queue_depth = ibmvfc_change_queue_depth,
.change_queue_type = ibmvfc_change_queue_type,
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h
index 1d18a4c48a9c..c3696ce470bd 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.h
+++ b/drivers/scsi/ibmvscsi/ibmvfc.h
@@ -337,7 +337,6 @@ struct ibmvfc_tmf {
#define IBMVFC_TMF_LUA_VALID 0x40
u32 cancel_key;
u32 my_cancel_key;
-#define IBMVFC_TMF_CANCEL_KEY 0x80000000
u32 pad;
u64 reserved[2];
}__attribute__((packed, aligned (8)));
@@ -606,6 +605,7 @@ struct ibmvfc_event {
struct srp_direct_buf *ext_list;
dma_addr_t ext_list_token;
struct completion comp;
+ struct completion *eh_comp;
struct timer_list timer;
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-18 01:31:12 +0000