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authorJeff Skirvin <jeffrey.d.skirvin@intel.com>2012-03-08 22:41:58 -0800
committerDan Williams <dan.j.williams@intel.com>2012-05-17 14:33:40 -0700
commitc94fc1ad25de885e1c59f714f19bc726e7a21caf (patch)
treef522804dabddeb78304384f897264f731588eab0 /drivers/scsi/isci
parentd6b2a0e4a066ea51322e16e66b25028cb0b4ca7e (diff)
downloadlinux-linaro-stable-c94fc1ad25de885e1c59f714f19bc726e7a21caf.tar.gz
isci: Distinguish between remote device suspension cases
For NCQ error conditions among others, there is no need to enable the link layer hang detect timer. Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/scsi/isci')
-rw-r--r--drivers/scsi/isci/remote_device.c27
-rw-r--r--drivers/scsi/isci/remote_node_context.c19
-rw-r--r--drivers/scsi/isci/remote_node_context.h5
-rw-r--r--drivers/scsi/isci/request.c2
4 files changed, 28 insertions, 25 deletions
diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c
index b14eff3c76d0..cc8ab69a2022 100644
--- a/drivers/scsi/isci/remote_device.c
+++ b/drivers/scsi/isci/remote_device.c
@@ -72,10 +72,11 @@ const char *dev_state_name(enum sci_remote_device_states state)
}
#undef C
-static enum sci_status sci_remote_device_suspend(struct isci_remote_device *idev)
+static enum sci_status sci_remote_device_suspend(struct isci_remote_device *idev,
+ enum sci_remote_node_suspension_reasons reason)
{
return sci_remote_node_context_suspend(&idev->rnc,
- SCI_SOFTWARE_SUSPENSION,
+ reason,
SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT,
NULL, NULL);
}
@@ -199,7 +200,7 @@ static void isci_remote_device_not_ready(struct isci_host *ihost,
set_bit(IDEV_IO_NCQERROR, &idev->flags);
/* Suspend the remote device so the I/O can be terminated. */
- sci_remote_device_suspend(idev);
+ sci_remote_device_suspend(idev, SCI_SW_SUSPEND_NORMAL);
/* Kill all outstanding requests for the device. */
sci_remote_device_terminate_requests(idev);
@@ -268,7 +269,8 @@ enum sci_status sci_remote_device_stop(struct isci_remote_device *idev,
rnc_destruct_done,
idev);
else {
- sci_remote_device_suspend(idev);
+ sci_remote_device_suspend(
+ idev, SCI_SW_SUSPEND_LINKHANG_DETECT);
sci_remote_device_terminate_requests(idev);
}
return SCI_SUCCESS;
@@ -473,11 +475,7 @@ enum sci_status sci_remote_device_event_handler(struct isci_remote_device *idev,
status = SCI_SUCCESS;
/* Suspend the associated RNC */
- sci_remote_node_context_suspend(
- &idev->rnc,
- SCI_SOFTWARE_SUSPENSION,
- SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT,
- NULL, NULL);
+ sci_remote_device_suspend(idev, SCI_SW_SUSPEND_NORMAL);
dev_dbg(scirdev_to_dev(idev),
"%s: device: %p event code: %x: %s\n",
@@ -789,9 +787,8 @@ enum sci_status sci_remote_device_start_task(struct isci_host *ihost,
* the correct action when the remote node context is suspended
* and later resumed.
*/
- sci_remote_node_context_suspend(
- &idev->rnc, SCI_SOFTWARE_SUSPENSION,
- SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT, NULL, NULL);
+ sci_remote_device_suspend(idev,
+ SCI_SW_SUSPEND_LINKHANG_DETECT);
status = sci_remote_node_context_start_task(&idev->rnc, ireq,
sci_remote_device_continue_request, idev);
@@ -986,9 +983,7 @@ static void sci_remote_device_resetting_state_enter(struct sci_base_state_machin
dev_dbg(&ihost->pdev->dev,
"%s: isci_device = %p\n", __func__, idev);
- sci_remote_node_context_suspend(
- &idev->rnc, SCI_SOFTWARE_SUSPENSION,
- SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT, NULL, NULL);
+ sci_remote_device_suspend(idev, SCI_SW_SUSPEND_LINKHANG_DETECT);
}
static void sci_remote_device_resetting_state_exit(struct sci_base_state_machine *sm)
@@ -1486,7 +1481,7 @@ enum sci_status isci_remote_device_suspend_terminate(
/* Put the device into suspension. */
spin_lock_irqsave(&ihost->scic_lock, flags);
- sci_remote_device_suspend(idev);
+ sci_remote_device_suspend(idev, SCI_SW_SUSPEND_LINKHANG_DETECT);
spin_unlock_irqrestore(&ihost->scic_lock, flags);
/* Terminate and wait for the completions. */
diff --git a/drivers/scsi/isci/remote_node_context.c b/drivers/scsi/isci/remote_node_context.c
index adbb4b80d9e4..85bf5ec26417 100644
--- a/drivers/scsi/isci/remote_node_context.c
+++ b/drivers/scsi/isci/remote_node_context.c
@@ -52,7 +52,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-
+#include <scsi/sas_ata.h>
#include "host.h"
#include "isci.h"
#include "remote_device.h"
@@ -315,7 +315,7 @@ static void sci_remote_node_context_ready_state_enter(struct sci_base_state_mach
if ((dest_select == RNC_DEST_SUSPENDED) ||
(dest_select == RNC_DEST_SUSPENDED_RESUME)) {
sci_remote_node_context_suspend(
- rnc, SCI_SOFTWARE_SUSPENSION,
+ rnc, SCI_SW_SUSPEND_NORMAL,
SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT, NULL, NULL);
if (dest_select == RNC_DEST_SUSPENDED_RESUME) {
@@ -352,8 +352,10 @@ static void sci_remote_node_context_await_suspend_state_exit(
{
struct sci_remote_node_context *rnc
= container_of(sm, typeof(*rnc), sm);
+ struct isci_remote_device *idev = rnc_to_dev(rnc);
- isci_dev_set_hang_detection_timeout(rnc_to_dev(rnc), 0);
+ if (dev_is_sata(idev->domain_dev))
+ isci_dev_set_hang_detection_timeout(idev, 0);
}
static const struct sci_base_state sci_remote_node_context_state_table[] = {
@@ -556,7 +558,7 @@ enum sci_status sci_remote_node_context_suspend(
suspend_type);
/* Disable automatic state continuations if explicitly suspending. */
- if ((suspend_reason != SCI_SOFTWARE_SUSPENSION) ||
+ if ((suspend_reason == SCI_HW_SUSPEND) ||
(sci_rnc->destination_state == RNC_DEST_FINAL))
dest_param = sci_rnc->destination_state;
@@ -612,8 +614,13 @@ enum sci_status sci_remote_node_context_suspend(
wake_up_all(&ihost->eventq); /* Let observers look. */
return SCI_SUCCESS;
}
- if (suspend_reason == SCI_SOFTWARE_SUSPENSION) {
- isci_dev_set_hang_detection_timeout(idev, 0x00000001);
+ if ((suspend_reason == SCI_SW_SUSPEND_NORMAL) ||
+ (suspend_reason == SCI_SW_SUSPEND_LINKHANG_DETECT)) {
+
+ if ((suspend_reason == SCI_SW_SUSPEND_LINKHANG_DETECT)
+ && dev_is_sata(idev->domain_dev))
+ isci_dev_set_hang_detection_timeout(idev, 0x00000001);
+
sci_remote_device_post_request(
idev, SCI_SOFTWARE_SUSPEND_CMD);
}
diff --git a/drivers/scsi/isci/remote_node_context.h b/drivers/scsi/isci/remote_node_context.h
index 48319066b4d6..364da3722aa4 100644
--- a/drivers/scsi/isci/remote_node_context.h
+++ b/drivers/scsi/isci/remote_node_context.h
@@ -76,8 +76,9 @@
#define SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX 0x0FFF
enum sci_remote_node_suspension_reasons {
- SCU_HARDWARE_SUSPENSION,
- SCI_SOFTWARE_SUSPENSION
+ SCI_HW_SUSPEND,
+ SCI_SW_SUSPEND_NORMAL,
+ SCI_SW_SUSPEND_LINKHANG_DETECT
};
#define SCI_SOFTWARE_SUSPEND_CMD SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX
#define SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT SCU_EVENT_TL_RNC_SUSPEND_TX_RX
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index 662f36de8052..48b409d68c0d 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -2380,7 +2380,7 @@ static void sci_request_handle_suspending_completions(
sci_remote_node_context_suspend(
&ireq->target_device->rnc,
- SCU_HARDWARE_SUSPENSION,
+ SCI_HW_SUSPEND,
(is_tx_rx) ? SCU_EVENT_TL_RNC_SUSPEND_TX_RX
: SCU_EVENT_TL_RNC_SUSPEND_TX,
NULL, NULL);