diff options
Diffstat (limited to 'drivers/scsi/isci/remote_node_context.h')
| -rw-r--r-- | drivers/scsi/isci/remote_node_context.h | 142 |
1 files changed, 77 insertions, 65 deletions
diff --git a/drivers/scsi/isci/remote_node_context.h b/drivers/scsi/isci/remote_node_context.h index 41580ad1252..c7ee81d0112 100644 --- a/drivers/scsi/isci/remote_node_context.h +++ b/drivers/scsi/isci/remote_node_context.h @@ -75,8 +75,13 @@ */ #define SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX 0x0FFF -#define SCU_HARDWARE_SUSPENSION (0) -#define SCI_SOFTWARE_SUSPENSION (1) +enum sci_remote_node_suspension_reasons { + 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 struct isci_request; struct isci_remote_device; @@ -85,61 +90,50 @@ struct sci_remote_node_context; typedef void (*scics_sds_remote_node_context_callback)(void *); /** - * This is the enumeration of the remote node context states. + * enum sci_remote_node_context_states + * @SCI_RNC_INITIAL initial state for a remote node context. On a resume + * request the remote node context will transition to the posting state. + * + * @SCI_RNC_POSTING: transition state that posts the RNi to the hardware. Once + * the RNC is posted the remote node context will be made ready. + * + * @SCI_RNC_INVALIDATING: transition state that will post an RNC invalidate to + * the hardware. Once the invalidate is complete the remote node context will + * transition to the posting state. + * + * @SCI_RNC_RESUMING: transition state that will post an RNC resume to the + * hardare. Once the event notification of resume complete is received the + * remote node context will transition to the ready state. + * + * @SCI_RNC_READY: state that the remote node context must be in to accept io + * request operations. + * + * @SCI_RNC_TX_SUSPENDED: state that the remote node context transitions to when + * it gets a TX suspend notification from the hardware. + * + * @SCI_RNC_TX_RX_SUSPENDED: state that the remote node context transitions to + * when it gets a TX RX suspend notification from the hardware. + * + * @SCI_RNC_AWAIT_SUSPENSION: wait state for the remote node context that waits + * for a suspend notification from the hardware. This state is entered when + * either there is a request to supend the remote node context or when there is + * a TC completion where the remote node will be suspended by the hardware. */ -enum scis_sds_remote_node_context_states { - /** - * This state is the initial state for a remote node context. On a resume - * request the remote node context will transition to the posting state. - */ - SCI_RNC_INITIAL, - - /** - * This is a transition state that posts the RNi to the hardware. Once the RNC - * is posted the remote node context will be made ready. - */ - SCI_RNC_POSTING, - - /** - * This is a transition state that will post an RNC invalidate to the - * hardware. Once the invalidate is complete the remote node context will - * transition to the posting state. - */ - SCI_RNC_INVALIDATING, - - /** - * This is a transition state that will post an RNC resume to the hardare. - * Once the event notification of resume complete is received the remote node - * context will transition to the ready state. - */ - SCI_RNC_RESUMING, - - /** - * This is the state that the remote node context must be in to accept io - * request operations. - */ - SCI_RNC_READY, - - /** - * This is the state that the remote node context transitions to when it gets - * a TX suspend notification from the hardware. - */ - SCI_RNC_TX_SUSPENDED, - - /** - * This is the state that the remote node context transitions to when it gets - * a TX RX suspend notification from the hardware. - */ - SCI_RNC_TX_RX_SUSPENDED, - - /** - * This state is a wait state for the remote node context that waits for a - * suspend notification from the hardware. This state is entered when either - * there is a request to supend the remote node context or when there is a TC - * completion where the remote node will be suspended by the hardware. - */ - SCI_RNC_AWAIT_SUSPENSION -}; +#define RNC_STATES {\ + C(RNC_INITIAL),\ + C(RNC_POSTING),\ + C(RNC_INVALIDATING),\ + C(RNC_RESUMING),\ + C(RNC_READY),\ + C(RNC_TX_SUSPENDED),\ + C(RNC_TX_RX_SUSPENDED),\ + C(RNC_AWAIT_SUSPENSION),\ + } +#undef C +#define C(a) SCI_##a +enum scis_sds_remote_node_context_states RNC_STATES; +#undef C +const char *rnc_state_name(enum scis_sds_remote_node_context_states state); /** * @@ -148,9 +142,13 @@ enum scis_sds_remote_node_context_states { * node context. */ enum sci_remote_node_context_destination_state { - SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED, - SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY, - SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL + RNC_DEST_UNSPECIFIED, + RNC_DEST_READY, + RNC_DEST_FINAL, + RNC_DEST_SUSPENDED, /* Set when suspend during post/invalidate */ + RNC_DEST_SUSPENDED_RESUME /* Set when a resume was done during posting + * or invalidating and already suspending. + */ }; /** @@ -167,10 +165,12 @@ struct sci_remote_node_context { u16 remote_node_index; /** - * This field is the recored suspension code or the reason for the remote node + * This field is the recored suspension type of the remote node * context suspension. */ - u32 suspension_code; + u32 suspend_type; + enum sci_remote_node_suspension_reasons suspend_reason; + u32 suspend_count; /** * This field is true if the remote node context is resuming from its current @@ -204,21 +204,33 @@ void sci_remote_node_context_construct(struct sci_remote_node_context *rnc, bool sci_remote_node_context_is_ready( struct sci_remote_node_context *sci_rnc); +bool sci_remote_node_context_is_suspended(struct sci_remote_node_context *sci_rnc); + enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_context *sci_rnc, u32 event_code); enum sci_status sci_remote_node_context_destruct(struct sci_remote_node_context *sci_rnc, scics_sds_remote_node_context_callback callback, void *callback_parameter); 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_remote_node_suspension_reasons reason, + u32 suspension_code); enum sci_status sci_remote_node_context_resume(struct sci_remote_node_context *sci_rnc, scics_sds_remote_node_context_callback cb_fn, void *cb_p); enum sci_status sci_remote_node_context_start_task(struct sci_remote_node_context *sci_rnc, - struct isci_request *ireq); + struct isci_request *ireq, + scics_sds_remote_node_context_callback cb_fn, + void *cb_p); 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); +static inline bool sci_remote_node_context_is_being_destroyed( + struct sci_remote_node_context *sci_rnc) +{ + return (sci_rnc->destination_state == RNC_DEST_FINAL) + || ((sci_rnc->sm.current_state_id == SCI_RNC_INITIAL) + && (sci_rnc->destination_state == RNC_DEST_UNSPECIFIED)); +} #endif /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */ |