From c94fc1ad25de885e1c59f714f19bc726e7a21caf Mon Sep 17 00:00:00 2001 From: Jeff Skirvin Date: Thu, 8 Mar 2012 22:41:58 -0800 Subject: 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 Signed-off-by: Dan Williams --- drivers/scsi/isci/remote_device.c | 27 +++++++++++---------------- drivers/scsi/isci/remote_node_context.c | 19 +++++++++++++------ drivers/scsi/isci/remote_node_context.h | 5 +++-- drivers/scsi/isci/request.c | 2 +- 4 files changed, 28 insertions(+), 25 deletions(-) (limited to 'drivers/scsi/isci') 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 #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); -- cgit v1.2.3