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>
__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;
}
/**
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
*/
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;
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);
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)
{
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)
{
* 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;
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);
+}
#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;
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_) */
{
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);
}
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)
{
},
[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,
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
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) {
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;
+ }
+}
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_ */
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);
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
* 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;
}
#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 {
projects / ~andy / linux / commitdiff