isci: Manage device suspensions during TC terminations.
TCs must be terminated only while the RNC is suspended. This commit
adds remote device suspensions and resumptions in the abort, reset and
termination paths.
Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c
index 374254e..9b8632f 100644
--- a/drivers/scsi/isci/task.c
+++ b/drivers/scsi/isci/task.c
@@ -716,6 +716,8 @@
unsigned long flags;
LIST_HEAD(list);
+ isci_remote_device_suspend(ihost, idev);
+
spin_lock_irqsave(&ihost->scic_lock, flags);
list_splice_init(&idev->reqs_in_process, &list);
@@ -826,40 +828,47 @@
int isci_task_lu_reset(struct domain_device *dev, u8 *lun)
{
- struct isci_host *isci_host = dev_to_ihost(dev);
+ struct isci_host *ihost = dev_to_ihost(dev);
struct isci_remote_device *isci_device;
unsigned long flags;
int ret;
- spin_lock_irqsave(&isci_host->scic_lock, flags);
+ spin_lock_irqsave(&ihost->scic_lock, flags);
isci_device = isci_lookup_device(dev);
- spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+ spin_unlock_irqrestore(&ihost->scic_lock, flags);
- dev_dbg(&isci_host->pdev->dev,
+ dev_dbg(&ihost->pdev->dev,
"%s: domain_device=%p, isci_host=%p; isci_device=%p\n",
- __func__, dev, isci_host, isci_device);
+ __func__, dev, ihost, isci_device);
if (!isci_device) {
/* If the device is gone, stop the escalations. */
- dev_dbg(&isci_host->pdev->dev, "%s: No dev\n", __func__);
+ dev_dbg(&ihost->pdev->dev, "%s: No dev\n", __func__);
ret = TMF_RESP_FUNC_COMPLETE;
goto out;
}
+ if (isci_remote_device_suspend(ihost, isci_device) != SCI_SUCCESS) {
+ dev_dbg(&ihost->pdev->dev,
+ "%s: device = %p; failed to suspend\n",
+ __func__, isci_device);
+ ret = TMF_RESP_FUNC_FAILED;
+ goto out;
+ }
/* Send the task management part of the reset. */
if (dev_is_sata(dev)) {
sas_ata_schedule_reset(dev);
ret = TMF_RESP_FUNC_COMPLETE;
} else
- ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun);
+ ret = isci_task_send_lu_reset_sas(ihost, isci_device, lun);
/* If the LUN reset worked, all the I/O can now be terminated. */
- if (ret == TMF_RESP_FUNC_COMPLETE)
+ if (ret == TMF_RESP_FUNC_COMPLETE) {
/* Terminate all I/O now. */
- isci_terminate_pending_requests(isci_host,
- isci_device);
-
+ isci_terminate_pending_requests(ihost, isci_device);
+ isci_remote_device_resume(ihost, isci_device, NULL, NULL);
+ }
out:
isci_put_device(isci_device);
return ret;
@@ -976,7 +985,7 @@
spin_unlock(&task->task_state_lock);
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
- dev_dbg(&isci_host->pdev->dev,
+ dev_warn(&isci_host->pdev->dev,
"%s: dev = %p, task = %p, old_request == %p\n",
__func__, isci_device, task, old_request);
@@ -998,7 +1007,7 @@
ret = TMF_RESP_FUNC_COMPLETE;
- dev_dbg(&isci_host->pdev->dev,
+ dev_warn(&isci_host->pdev->dev,
"%s: abort task not needed for %p\n",
__func__, task);
goto out;
@@ -1022,7 +1031,7 @@
/* The request was already being handled by someone else (because
* they got to set the state away from started).
*/
- dev_dbg(&isci_host->pdev->dev,
+ dev_warn(&isci_host->pdev->dev,
"%s: device = %p; old_request %p already being aborted\n",
__func__,
isci_device, old_request);
@@ -1035,7 +1044,7 @@
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
- dev_dbg(&isci_host->pdev->dev,
+ dev_warn(&isci_host->pdev->dev,
"%s: %s request"
" or complete_in_target (%d), thus no TMF\n",
__func__,
@@ -1068,6 +1077,15 @@
*/
perform_termination = 1;
+ if (isci_device && !test_bit(IDEV_GONE, &isci_device->flags) &&
+ (isci_remote_device_suspend(isci_host, isci_device)
+ != SCI_SUCCESS)) {
+ dev_warn(&isci_host->pdev->dev,
+ "%s: device = %p; failed to suspend\n",
+ __func__, isci_device);
+ goto out;
+ }
+
} else {
/* Fill in the tmf stucture */
isci_task_build_abort_task_tmf(&tmf, isci_tmf_ssp_task_abort,
@@ -1076,6 +1094,14 @@
spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+ if (isci_remote_device_suspend(isci_host, isci_device)
+ != SCI_SUCCESS) {
+ dev_warn(&isci_host->pdev->dev,
+ "%s: device = %p; failed to suspend\n",
+ __func__, isci_device);
+ goto out;
+ }
+
#define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* 1/2 second timeout */
ret = isci_task_execute_tmf(isci_host, isci_device, &tmf,
ISCI_ABORT_TASK_TIMEOUT_MS);
@@ -1083,7 +1109,7 @@
if (ret == TMF_RESP_FUNC_COMPLETE)
perform_termination = 1;
else
- dev_dbg(&isci_host->pdev->dev,
+ dev_warn(&isci_host->pdev->dev,
"%s: isci_task_send_tmf failed\n", __func__);
}
if (perform_termination) {
@@ -1094,6 +1120,7 @@
*/
isci_terminate_request_core(isci_host, isci_device,
old_request);
+ isci_remote_device_resume(isci_host, isci_device, NULL, NULL);
}
/* Make sure we do not leave a reference to aborted_io_completion */
@@ -1251,21 +1278,13 @@
struct isci_remote_device *idev)
{
int rc;
- unsigned long flags;
enum sci_status status;
struct sas_phy *phy = sas_get_local_phy(dev);
struct isci_port *iport = dev->port->lldd_port;
dev_dbg(&ihost->pdev->dev, "%s: idev %p\n", __func__, idev);
- spin_lock_irqsave(&ihost->scic_lock, flags);
- status = sci_remote_device_reset(idev);
- spin_unlock_irqrestore(&ihost->scic_lock, flags);
-
- if (status != SCI_SUCCESS) {
- dev_dbg(&ihost->pdev->dev,
- "%s: sci_remote_device_reset(%p) returned %d!\n",
- __func__, idev, status);
+ if (isci_remote_device_reset(ihost, idev) != SCI_SUCCESS) {
rc = TMF_RESP_FUNC_FAILED;
goto out;
}
@@ -1281,15 +1300,12 @@
isci_remote_device_nuke_requests(ihost, idev);
/* Since all pending TCs have been cleaned, resume the RNC. */
- spin_lock_irqsave(&ihost->scic_lock, flags);
- status = sci_remote_device_reset_complete(idev);
- spin_unlock_irqrestore(&ihost->scic_lock, flags);
+ status = isci_remote_device_reset_complete(ihost, idev);
- if (status != SCI_SUCCESS) {
+ if (status != SCI_SUCCESS)
dev_dbg(&ihost->pdev->dev,
- "%s: sci_remote_device_reset_complete(%p) "
+ "%s: isci_remote_device_reset_complete(%p) "
"returned %d!\n", __func__, idev, status);
- }
dev_dbg(&ihost->pdev->dev, "%s: idev %p complete.\n", __func__, idev);
out:
@@ -1305,7 +1321,7 @@
int ret;
spin_lock_irqsave(&ihost->scic_lock, flags);
- idev = isci_lookup_device(dev);
+ idev = isci_get_device(dev);
spin_unlock_irqrestore(&ihost->scic_lock, flags);
if (!idev) {
