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isci: Terminate outstanding TCs on TX/RX RNC suspensions.

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TCs must only be terminated when RNCs are suspended.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Jeff Skirvin 2012-03-08 22:41:50 -08:00 committed by Dan Williams
parent ac78ed0f78
commit 726980d569
7 changed files with 188 additions and 32 deletions
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22
drivers/scsi/isci/host.c
View File

@ -2696,18 +2696,18 @@ enum sci_status sci_controller_terminate_request(struct isci_host *ihost,
__func__, ihost->sm.current_state_id);
return SCI_FAILURE_INVALID_STATE;
}
status = sci_io_request_terminate(ireq);
if (status != SCI_SUCCESS)
return status;
/*
* Utilize the original post context command and or in the POST_TC_ABORT
* request sub-type.
*/
sci_controller_post_request(ihost,
ireq->post_context | SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT);
return SCI_SUCCESS;
if ((status == SCI_SUCCESS) &&
!test_bit(IREQ_PENDING_ABORT, &ireq->flags) &&
!test_and_set_bit(IREQ_TC_ABORT_POSTED, &ireq->flags)) {
/* Utilize the original post context command and or in the
* POST_TC_ABORT request sub-type.
*/
sci_controller_post_request(
ihost, ireq->post_context |
SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT);
}
return status;
}
/**

106
drivers/scsi/isci/remote_device.c
View File

@ -133,6 +133,50 @@ static void isci_remote_device_ready(struct isci_host *ihost, struct isci_remote
wake_up(&ihost->eventq);
}
static enum sci_status sci_remote_device_suspend(
struct isci_remote_device *idev)
{
return sci_remote_node_context_suspend(
&idev->rnc,
SCI_SOFTWARE_SUSPENSION,
SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT,
NULL, NULL);
}
enum sci_status isci_remote_device_suspend(
struct isci_host *ihost,
struct isci_remote_device *idev)
{
enum sci_status status;
unsigned long flags;
spin_lock_irqsave(&ihost->scic_lock, flags);
if (isci_lookup_device(idev->domain_dev) == NULL) {
spin_unlock_irqrestore(&ihost->scic_lock, flags);
status = SCI_FAILURE;
} else {
status = sci_remote_device_suspend(idev);
spin_unlock_irqrestore(&ihost->scic_lock, flags);
if (status == SCI_SUCCESS) {
wait_event(ihost->eventq,
test_bit(IDEV_TXRX_SUSPENDED, &idev->flags)
|| !test_bit(IDEV_ALLOCATED, &idev->flags));
status = test_bit(IDEV_TXRX_SUSPENDED, &idev->flags)
? SCI_SUCCESS : SCI_FAILURE;
dev_dbg(&ihost->pdev->dev,
"%s: idev=%p, wait done, device is %s\n",
__func__, idev,
test_bit(IDEV_TXRX_SUSPENDED, &idev->flags)
? "<suspended>" : "<deallocated!>");
}
isci_put_device(idev);
}
return status;
}
/* called once the remote node context is ready to be freed.
* The remote device can now report that its stop operation is complete. none
*/
@ -144,7 +188,9 @@ static void rnc_destruct_done(void *_dev)
sci_change_state(&idev->sm, SCI_DEV_STOPPED);
}
static enum sci_status sci_remote_device_terminate_requests(struct isci_remote_device *idev)
static enum sci_status sci_remote_device_terminate_requests_checkabort(
struct isci_remote_device *idev,
int check_abort_pending)
{
struct isci_host *ihost = idev->owning_port->owning_controller;
enum sci_status status = SCI_SUCCESS;
@ -155,7 +201,9 @@ static enum sci_status sci_remote_device_terminate_requests(struct isci_remote_d
enum sci_status s;
if (!test_bit(IREQ_ACTIVE, &ireq->flags) ||
ireq->target_device != idev)
(ireq->target_device != idev) ||
(check_abort_pending && !test_bit(IREQ_PENDING_ABORT,
&ireq->flags)))
continue;
s = sci_controller_terminate_request(ihost, idev, ireq);
@ -166,6 +214,12 @@ static enum sci_status sci_remote_device_terminate_requests(struct isci_remote_d
return status;
}
enum sci_status sci_remote_device_terminate_requests(
struct isci_remote_device *idev)
{
return sci_remote_device_terminate_requests_checkabort(idev, 0);
}
enum sci_status sci_remote_device_stop(struct isci_remote_device *idev,
u32 timeout)
{
@ -265,14 +319,6 @@ enum sci_status sci_remote_device_reset_complete(struct isci_remote_device *idev
return SCI_SUCCESS;
}
enum sci_status sci_remote_device_suspend(struct isci_remote_device *idev)
{
return sci_remote_node_context_suspend(&idev->rnc,
SCI_SOFTWARE_SUSPENSION,
SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT,
NULL, NULL);
}
enum sci_status sci_remote_device_frame_handler(struct isci_remote_device *idev,
u32 frame_index)
{
@ -1186,7 +1232,7 @@ static enum sci_status sci_remote_device_ea_construct(struct isci_port *iport,
* the device when there have been no phys added to it.
*/
static enum sci_status sci_remote_device_start(struct isci_remote_device *idev,
u32 timeout)
u32 timeout)
{
struct sci_base_state_machine *sm = &idev->sm;
enum sci_remote_device_states state = sm->current_state_id;
@ -1413,3 +1459,41 @@ int isci_remote_device_found(struct domain_device *dev)
return status == SCI_SUCCESS ? 0 : -ENODEV;
}
enum sci_status isci_remote_device_reset(
struct isci_remote_device *idev)
{
struct isci_host *ihost = dev_to_ihost(idev->domain_dev);
unsigned long flags;
enum sci_status status;
/* Wait for the device suspend. */
status = isci_remote_device_suspend(ihost, idev);
if (status != SCI_SUCCESS) {
dev_dbg(&ihost->pdev->dev,
"%s: isci_remote_device_suspend(%p) returned %d!\n",
__func__, idev, status);
return status;
}
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);
}
return status;
}
int isci_remote_device_is_safe_to_abort(
struct isci_remote_device *idev)
{
return sci_remote_node_context_is_safe_to_abort(&idev->rnc);
}
enum sci_status sci_remote_device_abort_requests_pending_abort(
struct isci_remote_device *idev)
{
return sci_remote_device_terminate_requests_checkabort(idev, 1);
}

10
drivers/scsi/isci/remote_device.h
View File

@ -85,6 +85,7 @@ struct isci_remote_device {
#define IDEV_GONE 3
#define IDEV_IO_READY 4
#define IDEV_IO_NCQERROR 5
#define IDEV_TXRX_SUSPENDED 6
unsigned long flags;
struct kref kref;
struct isci_port *isci_port;
@ -335,4 +336,13 @@ void sci_remote_device_post_request(
struct isci_remote_device *idev,
u32 request);
enum sci_status sci_remote_device_terminate_requests(
struct isci_remote_device *idev);
int isci_remote_device_is_safe_to_abort(
struct isci_remote_device *idev);
enum sci_status
sci_remote_device_abort_requests_pending_abort(
struct isci_remote_device *idev);
#endif /* !defined(_ISCI_REMOTE_DEVICE_H_) */

56
drivers/scsi/isci/remote_node_context.c
View File

@ -268,6 +268,8 @@ static void sci_remote_node_context_invalidating_state_enter(struct sci_base_sta
{
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
/* Terminate outstanding requests pending abort. */
sci_remote_device_abort_requests_pending_abort(rnc_to_dev(rnc));
sci_remote_node_context_invalidate_context_buffer(rnc);
}
@ -312,10 +314,28 @@ static void sci_remote_node_context_tx_suspended_state_enter(struct sci_base_sta
static void sci_remote_node_context_tx_rx_suspended_state_enter(struct sci_base_state_machine *sm)
{
struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
struct isci_remote_device *idev = rnc_to_dev(rnc);
struct isci_host *ihost = idev->owning_port->owning_controller;
set_bit(IDEV_TXRX_SUSPENDED, &idev->flags);
/* Terminate outstanding requests pending abort. */
sci_remote_device_abort_requests_pending_abort(idev);
wake_up(&ihost->eventq);
sci_remote_node_context_continue_state_transitions(rnc);
}
static void sci_remote_node_context_tx_rx_suspended_state_exit(
struct sci_base_state_machine *sm)
{
struct sci_remote_node_context *rnc
= container_of(sm, typeof(*rnc), sm);
struct isci_remote_device *idev = rnc_to_dev(rnc);
clear_bit(IDEV_TXRX_SUSPENDED, &idev->flags);
}
static void sci_remote_node_context_await_suspend_state_exit(
struct sci_base_state_machine *sm)
{
@ -346,6 +366,8 @@ static const struct sci_base_state sci_remote_node_context_state_table[] = {
},
[SCI_RNC_TX_RX_SUSPENDED] = {
.enter_state = sci_remote_node_context_tx_rx_suspended_state_enter,
.exit_state
= sci_remote_node_context_tx_rx_suspended_state_exit,
},
[SCI_RNC_AWAIT_SUSPENSION] = {
.exit_state = sci_remote_node_context_await_suspend_state_exit,
@ -515,6 +537,13 @@ enum sci_status sci_remote_node_context_suspend(
struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
enum sci_status status = SCI_FAILURE_INVALID_STATE;
dev_dbg(scirdev_to_dev(idev),
"%s: current state %d, current suspend_type %x dest state %d,"
" arg suspend_reason %d, arg suspend_type %x",
__func__, state, sci_rnc->suspend_type,
sci_rnc->destination_state, suspend_reason,
suspend_type);
/* Disable automatic state continuations if explicitly suspending. */
if (suspend_reason == SCI_SOFTWARE_SUSPENSION)
sci_rnc->destination_state
@ -546,7 +575,10 @@ enum sci_status sci_remote_node_context_suspend(
sci_rnc->suspend_type = suspend_type;
if (status == SCI_SUCCESS) { /* Already in the destination state? */
struct isci_host *ihost = idev->owning_port->owning_controller;
sci_remote_node_context_notify_user(sci_rnc);
wake_up_all(&ihost->eventq); /* Let observers look. */
return SCI_SUCCESS;
}
if (suspend_reason == SCI_SOFTWARE_SUSPENSION) {
@ -661,3 +693,27 @@ enum sci_status sci_remote_node_context_start_task(struct sci_remote_node_contex
return SCI_FAILURE_INVALID_STATE;
}
}
int sci_remote_node_context_is_safe_to_abort(
struct sci_remote_node_context *sci_rnc)
{
enum scis_sds_remote_node_context_states state;
state = sci_rnc->sm.current_state_id;
switch (state) {
case SCI_RNC_INVALIDATING:
case SCI_RNC_TX_RX_SUSPENDED:
return 1;
case SCI_RNC_POSTING:
case SCI_RNC_RESUMING:
case SCI_RNC_READY:
case SCI_RNC_TX_SUSPENDED:
case SCI_RNC_AWAIT_SUSPENSION:
case SCI_RNC_INITIAL:
return 0;
default:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: invalid state %d\n", __func__, state);
return 0;
}
}

2
drivers/scsi/isci/remote_node_context.h
View File

@ -214,5 +214,7 @@ enum sci_status sci_remote_node_context_start_task(struct sci_remote_node_contex
struct isci_request *ireq);
enum sci_status sci_remote_node_context_start_io(struct sci_remote_node_context *sci_rnc,
struct isci_request *ireq);
int sci_remote_node_context_is_safe_to_abort(
struct sci_remote_node_context *sci_rnc);
#endif /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */

22
drivers/scsi/isci/request.c
View File

@ -863,6 +863,8 @@ sci_io_request_terminate(struct isci_request *ireq)
switch (state) {
case SCI_REQ_CONSTRUCTED:
/* Set to make sure no HW terminate posting is done: */
set_bit(IREQ_TC_ABORT_POSTED, &ireq->flags);
ireq->scu_status = SCU_TASK_DONE_TASK_ABORT;
ireq->sci_status = SCI_FAILURE_IO_TERMINATED;
sci_change_state(&ireq->sm, SCI_REQ_COMPLETED);
@ -883,8 +885,7 @@ sci_io_request_terminate(struct isci_request *ireq)
case SCI_REQ_ATAPI_WAIT_PIO_SETUP:
case SCI_REQ_ATAPI_WAIT_D2H:
case SCI_REQ_ATAPI_WAIT_TC_COMP:
sci_change_state(&ireq->sm, SCI_REQ_ABORTING);
return SCI_SUCCESS;
/* Fall through and change state to ABORTING... */
case SCI_REQ_TASK_WAIT_TC_RESP:
/* The task frame was already confirmed to have been
* sent by the SCU HW. Since the state machine is
@ -893,20 +894,21 @@ sci_io_request_terminate(struct isci_request *ireq)
* and don't wait for the task response.
*/
sci_change_state(&ireq->sm, SCI_REQ_ABORTING);
sci_change_state(&ireq->sm, SCI_REQ_COMPLETED);
return SCI_SUCCESS;
/* Fall through and handle like ABORTING... */
case SCI_REQ_ABORTING:
/* If a request has a termination requested twice, return
* a failure indication, since HW confirmation of the first
* abort is still outstanding.
if (!isci_remote_device_is_safe_to_abort(ireq->target_device))
set_bit(IREQ_PENDING_ABORT, &ireq->flags);
else
clear_bit(IREQ_PENDING_ABORT, &ireq->flags);
/* If the request is only waiting on the remote device
* suspension, return SUCCESS so the caller will wait too.
*/
return SCI_SUCCESS;
case SCI_REQ_COMPLETED:
default:
dev_warn(&ireq->owning_controller->pdev->dev,
"%s: SCIC IO Request requested to abort while in wrong "
"state %d\n",
__func__,
ireq->sm.current_state_id);
"state %d\n", __func__, ireq->sm.current_state_id);
break;
}

2
drivers/scsi/isci/request.h
View File

@ -102,6 +102,8 @@ struct isci_request {
#define IREQ_TERMINATED 1
#define IREQ_TMF 2
#define IREQ_ACTIVE 3
#define IREQ_PENDING_ABORT 4 /* Set == device was not suspended yet */
#define IREQ_TC_ABORT_POSTED 5
unsigned long flags;
/* XXX kill ttype and ttype_ptr, allocate full sas_task */
union ttype_ptr_union {