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path: root/drivers/scsi/isci/remote_node_context.c
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Diffstat (limited to 'drivers/scsi/isci/remote_node_context.c')
-rw-r--r--drivers/scsi/isci/remote_node_context.c74
1 files changed, 51 insertions, 23 deletions
diff --git a/drivers/scsi/isci/remote_node_context.c b/drivers/scsi/isci/remote_node_context.c
index 3e849752bffa..f180c726c5bb 100644
--- a/drivers/scsi/isci/remote_node_context.c
+++ b/drivers/scsi/isci/remote_node_context.c
@@ -367,6 +367,7 @@ enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_con
u32 event_code)
{
enum scis_sds_remote_node_context_states state;
+ u32 next_state;
state = sci_rnc->sm.current_state_id;
switch (state) {
@@ -425,11 +426,11 @@ enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_con
switch (scu_get_event_type(event_code)) {
case SCU_EVENT_TL_RNC_SUSPEND_TX:
sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED);
- sci_rnc->suspension_code = scu_get_event_specifier(event_code);
+ sci_rnc->suspend_type = scu_get_event_type(event_code);
break;
case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED);
- sci_rnc->suspension_code = scu_get_event_specifier(event_code);
+ sci_rnc->suspend_type = scu_get_event_type(event_code);
break;
default:
goto out;
@@ -438,16 +439,16 @@ enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_con
case SCI_RNC_AWAIT_SUSPENSION:
switch (scu_get_event_type(event_code)) {
case SCU_EVENT_TL_RNC_SUSPEND_TX:
- sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED);
- sci_rnc->suspension_code = scu_get_event_specifier(event_code);
+ next_state = SCI_RNC_TX_SUSPENDED;
break;
case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
- sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED);
- sci_rnc->suspension_code = scu_get_event_specifier(event_code);
+ next_state = SCI_RNC_TX_RX_SUSPENDED;
break;
default:
goto out;
}
+ if (sci_rnc->suspend_type == scu_get_event_type(event_code))
+ sci_change_state(&sci_rnc->sm, next_state);
break;
default:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
@@ -502,33 +503,60 @@ enum sci_status sci_remote_node_context_destruct(struct sci_remote_node_context
}
}
-enum sci_status sci_remote_node_context_suspend(struct sci_remote_node_context *sci_rnc,
- u32 suspend_type,
- scics_sds_remote_node_context_callback cb_fn,
- void *cb_p)
+enum sci_status sci_remote_node_context_suspend(
+ struct sci_remote_node_context *sci_rnc,
+ enum sci_remote_node_suspension_reasons suspend_reason,
+ u32 suspend_type,
+ scics_sds_remote_node_context_callback cb_fn,
+ void *cb_p)
{
- enum scis_sds_remote_node_context_states state;
+ enum scis_sds_remote_node_context_states state
+ = sci_rnc->sm.current_state_id;
+ struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
+ enum sci_status status = SCI_FAILURE_INVALID_STATE;
- state = sci_rnc->sm.current_state_id;
- if (state != SCI_RNC_READY) {
+ /* Disable automatic state continuations if explicitly suspending. */
+ if (suspend_reason == SCI_SOFTWARE_SUSPENSION)
+ sci_rnc->destination_state
+ = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED;
+ switch (state) {
+ case SCI_RNC_READY:
+ break;
+ case SCI_RNC_TX_SUSPENDED:
+ if (suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX)
+ status = SCI_SUCCESS;
+ break;
+ case SCI_RNC_TX_RX_SUSPENDED:
+ if (suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX_RX)
+ status = SCI_SUCCESS;
+ break;
+ case SCI_RNC_AWAIT_SUSPENSION:
+ if ((sci_rnc->suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX_RX)
+ || (suspend_type == sci_rnc->suspend_type))
+ return SCI_SUCCESS;
+ break;
+ default:
dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
"%s: invalid state %s\n", __func__,
rnc_state_name(state));
return SCI_FAILURE_INVALID_STATE;
}
+ sci_rnc->user_callback = cb_fn;
+ sci_rnc->user_cookie = cb_p;
+ sci_rnc->suspend_type = suspend_type;
- sci_rnc->user_callback = cb_fn;
- sci_rnc->user_cookie = cb_p;
- sci_rnc->suspension_code = suspend_type;
-
- if (suspend_type == SCI_SOFTWARE_SUSPENSION) {
- sci_remote_device_post_request(rnc_to_dev(sci_rnc),
- SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX);
- isci_dev_set_hang_detection_timeout(rnc_to_dev(sci_rnc),
- 0x00000001);
+ if (status == SCI_SUCCESS) { /* Already in the destination state? */
+ sci_remote_node_context_notify_user(sci_rnc);
+ return SCI_SUCCESS;
+ }
+ if (suspend_reason == SCI_SOFTWARE_SUSPENSION) {
+ isci_dev_set_hang_detection_timeout(idev, 0x00000001);
+ sci_remote_device_post_request(
+ idev, SCI_SOFTWARE_SUSPEND_CMD);
}
+ if (state != SCI_RNC_AWAIT_SUSPENSION)
+ sci_change_state(&sci_rnc->sm, SCI_RNC_AWAIT_SUSPENSION);
- sci_change_state(&sci_rnc->sm, SCI_RNC_AWAIT_SUSPENSION);
return SCI_SUCCESS;
}