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56 #ifndef _SCIC_SDS_REMOTE_NODE_CONTEXT_H_
57 #define _SCIC_SDS_REMOTE_NODE_CONTEXT_H_
60 * This file contains the structures, constants, and prototypes associated with
61 * the remote node context in the silicon. It exists to model and manage
62 * the remote node context in the silicon.
67 #include "state_machine.h"
72 * This constant represents an invalid remote device id, it is used to program
73 * the STPDARNI register so the driver knows when it has received a SIGNATURE
76 #define SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX 0x0FFF
78 #define SCU_HARDWARE_SUSPENSION (0)
79 #define SCI_SOFTWARE_SUSPENSION (1)
81 struct scic_sds_request;
82 struct scic_sds_remote_device;
83 struct scic_sds_remote_node_context;
85 typedef void (*scics_sds_remote_node_context_callback)(void *);
87 typedef enum sci_status (*scic_sds_remote_node_context_operation)(
88 struct scic_sds_remote_node_context *sci_rnc,
89 scics_sds_remote_node_context_callback callback,
90 void *callback_parameter
93 typedef enum sci_status (*scic_sds_remote_node_context_suspend_operation)(
94 struct scic_sds_remote_node_context *sci_rnc,
96 scics_sds_remote_node_context_callback callback,
97 void *callback_parameter
100 typedef enum sci_status (*scic_sds_remote_node_context_io_request)(
101 struct scic_sds_remote_node_context *sci_rnc,
102 struct scic_sds_request *sci_req
105 struct scic_sds_remote_node_context_handlers {
107 * This handle is invoked to stop the RNC. The callback is invoked when after
108 * the hardware notification that the RNC has been invalidated.
110 scic_sds_remote_node_context_operation destruct_handler;
113 * This handler is invoked when there is a request to suspend the RNC. The
114 * callback is invoked after the hardware notification that the remote node is
117 scic_sds_remote_node_context_suspend_operation suspend_handler;
120 * This handler is invoked when there is a request to resume the RNC. The
121 * callback is invoked when after the RNC has reached the ready state.
123 scic_sds_remote_node_context_operation resume_handler;
126 * This handler is invoked when there is a request to start an io request
129 scic_sds_remote_node_context_io_request start_io_handler;
132 * This handler is invoked when there is a request to start a task request
135 scic_sds_remote_node_context_io_request start_task_handler;
139 * This is the enumeration of the remote node context states.
141 enum scis_sds_remote_node_context_states {
143 * This state is the initial state for a remote node context. On a resume
144 * request the remote node context will transition to the posting state.
146 SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE,
149 * This is a transition state that posts the RNi to the hardware. Once the RNC
150 * is posted the remote node context will be made ready.
152 SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE,
155 * This is a transition state that will post an RNC invalidate to the
156 * hardware. Once the invalidate is complete the remote node context will
157 * transition to the posting state.
159 SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE,
162 * This is a transition state that will post an RNC resume to the hardare.
163 * Once the event notification of resume complete is received the remote node
164 * context will transition to the ready state.
166 SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE,
169 * This is the state that the remote node context must be in to accept io
170 * request operations.
172 SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE,
175 * This is the state that the remote node context transitions to when it gets
176 * a TX suspend notification from the hardware.
178 SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE,
181 * This is the state that the remote node context transitions to when it gets
182 * a TX RX suspend notification from the hardware.
184 SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE,
187 * This state is a wait state for the remote node context that waits for a
188 * suspend notification from the hardware. This state is entered when either
189 * there is a request to supend the remote node context or when there is a TC
190 * completion where the remote node will be suspended by the hardware.
192 SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE
198 * This enumeration is used to define the end destination state for the remote
201 enum scic_sds_remote_node_context_destination_state {
202 SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED,
203 SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY,
204 SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL
208 * struct scic_sds_remote_node_context - This structure contains the data
209 * associated with the remote node context object. The remote node context
210 * (RNC) object models the the remote device information necessary to manage
213 struct scic_sds_remote_node_context {
215 * This field indicates the remote node index (RNI) associated with
218 u16 remote_node_index;
221 * This field is the recored suspension code or the reason for the remote node
222 * context suspension.
227 * This field is true if the remote node context is resuming from its current
228 * state. This can cause an automatic resume on receiving a suspension
231 enum scic_sds_remote_node_context_destination_state destination_state;
234 * This field contains the callback function that the user requested to be
235 * called when the requested state transition is complete.
237 scics_sds_remote_node_context_callback user_callback;
240 * This field contains the parameter that is called when the user requested
241 * state transition is completed.
246 * This field contains the data for the object's state machine.
248 struct sci_base_state_machine state_machine;
250 struct scic_sds_remote_node_context_handlers *state_handlers;
253 void scic_sds_remote_node_context_construct(struct scic_sds_remote_node_context *rnc,
254 u16 remote_node_index);
257 bool scic_sds_remote_node_context_is_ready(
258 struct scic_sds_remote_node_context *sci_rnc);
260 #define scic_sds_remote_node_context_get_remote_node_index(rcn) \
261 ((rnc)->remote_node_index)
264 enum sci_status scic_sds_remote_node_context_event_handler(struct scic_sds_remote_node_context *sci_rnc,
267 #define scic_sds_remote_node_context_resume(rnc, callback, parameter) \
268 ((rnc)->state_handlers->resume_handler(rnc, callback, parameter))
270 #define scic_sds_remote_node_context_suspend(rnc, suspend_type, callback, parameter) \
271 ((rnc)->state_handlers->suspend_handler(rnc, suspend_type, callback, parameter))
273 #define scic_sds_remote_node_context_destruct(rnc, callback, parameter) \
274 ((rnc)->state_handlers->destruct_handler(rnc, callback, parameter))
276 #define scic_sds_remote_node_context_start_io(rnc, request) \
277 ((rnc)->state_handlers->start_io_handler(rnc, request))
279 #define scic_sds_remote_node_context_start_task(rnc, task) \
280 ((rnc)->state_handlers->start_task_handler(rnc, task))
282 #endif /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */