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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 "sci_types.h"
68 #include "sci_base_state.h"
69 #include "sci_base_state_machine.h"
71 /* --------------------------------------------------------------------------- */
76 * This constant represents an invalid remote device id, it is used to program
77 * the STPDARNI register so the driver knows when it has received a SIGNATURE
80 #define SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX 0x0FFF
82 #define SCU_HARDWARE_SUSPENSION (0)
83 #define SCI_SOFTWARE_SUSPENSION (1)
85 struct scic_sds_request;
86 struct scic_sds_remote_device;
87 struct scic_sds_remote_node_context;
89 typedef void (*SCICS_SDS_REMOTE_NODE_CONTEXT_CALLBACK)(void *);
91 typedef enum sci_status (*SCIC_SDS_REMOTE_NODE_CONTEXT_OPERATION)(
92 struct scic_sds_remote_node_context *this_rnc,
93 SCICS_SDS_REMOTE_NODE_CONTEXT_CALLBACK the_callback,
94 void *callback_parameter
97 typedef enum sci_status (*SCIC_SDS_REMOTE_NODE_CONTEXT_SUSPEND_OPERATION)(
98 struct scic_sds_remote_node_context *this_rnc,
100 SCICS_SDS_REMOTE_NODE_CONTEXT_CALLBACK the_callback,
101 void *callback_parameter
104 typedef enum sci_status (*SCIC_SDS_REMOTE_NODE_CONTEXT_IO_REQUEST)(
105 struct scic_sds_remote_node_context *this_rnc,
106 struct scic_sds_request *the_request
109 typedef enum sci_status (*SCIC_SDS_REMOTE_NODE_CONTEXT_EVENT_HANDLER)(
110 struct scic_sds_remote_node_context *this_rnc,
114 /* --------------------------------------------------------------------------- */
116 struct scic_sds_remote_node_context_handlers {
118 * This handle is invoked to stop the RNC. The callback is invoked when after
119 * the hardware notification that the RNC has been invalidated.
121 SCIC_SDS_REMOTE_NODE_CONTEXT_OPERATION destruct_handler;
124 * This handler is invoked when there is a request to suspend the RNC. The
125 * callback is invoked after the hardware notification that the remote node is
128 SCIC_SDS_REMOTE_NODE_CONTEXT_SUSPEND_OPERATION suspend_handler;
131 * This handler is invoked when there is a request to resume the RNC. The
132 * callback is invoked when after the RNC has reached the ready state.
134 SCIC_SDS_REMOTE_NODE_CONTEXT_OPERATION resume_handler;
137 * This handler is invoked when there is a request to start an io request
140 SCIC_SDS_REMOTE_NODE_CONTEXT_IO_REQUEST start_io_handler;
143 * This handler is invoked when there is a request to start a task request
146 SCIC_SDS_REMOTE_NODE_CONTEXT_IO_REQUEST start_task_handler;
149 * This handler is invoked where there is an RNC event that must be processed.
151 SCIC_SDS_REMOTE_NODE_CONTEXT_EVENT_HANDLER event_handler;
155 /* --------------------------------------------------------------------------- */
160 * This is the enumeration of the remote node context states.
162 enum scis_sds_remote_node_context_states {
164 * This state is the initial state for a remote node context. On a resume
165 * request the remote node context will transition to the posting state.
167 SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE,
170 * This is a transition state that posts the RNi to the hardware. Once the RNC
171 * is posted the remote node context will be made ready.
173 SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE,
176 * This is a transition state that will post an RNC invalidate to the
177 * hardware. Once the invalidate is complete the remote node context will
178 * transition to the posting state.
180 SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE,
183 * This is a transition state that will post an RNC resume to the hardare.
184 * Once the event notification of resume complete is received the remote node
185 * context will transition to the ready state.
187 SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE,
190 * This is the state that the remote node context must be in to accept io
191 * request operations.
193 SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE,
196 * This is the state that the remote node context transitions to when it gets
197 * a TX suspend notification from the hardware.
199 SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE,
202 * This is the state that the remote node context transitions to when it gets
203 * a TX RX suspend notification from the hardware.
205 SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE,
208 * This state is a wait state for the remote node context that waits for a
209 * suspend notification from the hardware. This state is entered when either
210 * there is a request to supend the remote node context or when there is a TC
211 * completion where the remote node will be suspended by the hardware.
213 SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE,
215 SCIC_SDS_REMOTE_NODE_CONTEXT_MAX_STATES
222 * This enumeration is used to define the end destination state for the remote
225 enum SCIC_SDS_REMOTE_NODE_CONTEXT_DESTINATION_STATE {
226 SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED,
227 SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY,
228 SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL
232 * struct scic_sds_remote_node_context - This structure contains the data
233 * associated with the remote node context object. The remote node context
234 * (RNC) object models the the remote device information necessary to manage
239 struct scic_sds_remote_node_context {
243 struct sci_base_object parent;
246 * This pointer simply points to the remote device object containing
249 * @todo Consider making the device pointer the associated object of the
252 struct scic_sds_remote_device *device;
255 * This field indicates the remote node index (RNI) associated with
258 u16 remote_node_index;
261 * This field is the recored suspension code or the reason for the remote node
262 * context suspension.
267 * This field is true if the remote node context is resuming from its current
268 * state. This can cause an automatic resume on receiving a suspension
271 enum SCIC_SDS_REMOTE_NODE_CONTEXT_DESTINATION_STATE destination_state;
274 * This field contains the callback function that the user requested to be
275 * called when the requested state transition is complete.
277 SCICS_SDS_REMOTE_NODE_CONTEXT_CALLBACK user_callback;
280 * This field contains the parameter that is called when the user requested
281 * state transition is completed.
286 * This field contains the data for the object's state machine.
288 struct sci_base_state_machine state_machine;
290 struct scic_sds_remote_node_context_handlers *state_handlers;
293 /* --------------------------------------------------------------------------- */
295 extern const struct sci_base_state scic_sds_remote_node_context_state_table[];
297 extern struct scic_sds_remote_node_context_handlers
298 scic_sds_remote_node_context_state_handler_table[
299 SCIC_SDS_REMOTE_NODE_CONTEXT_MAX_STATES];
301 /* --------------------------------------------------------------------------- */
303 void scic_sds_remote_node_context_construct(
304 struct scic_sds_remote_device *device,
305 struct scic_sds_remote_node_context *rnc,
306 u16 remote_node_index);
308 void scic_sds_remote_node_context_construct_buffer(
309 struct scic_sds_remote_node_context *rnc);
312 bool scic_sds_remote_node_context_is_ready(
313 struct scic_sds_remote_node_context *this_rnc);
315 #define scic_sds_remote_node_context_set_remote_node_index(rnc, rni) \
316 ((rnc)->remote_node_index = (rni))
318 #define scic_sds_remote_node_context_get_remote_node_index(rcn) \
319 ((rnc)->remote_node_index)
321 #define scic_sds_remote_node_context_event_handler(rnc, event_code) \
322 ((rnc)->state_handlers->event_handler(rnc, event_code))
324 #define scic_sds_remote_node_context_resume(rnc, callback, parameter) \
325 ((rnc)->state_handlers->resume_handler(rnc, callback, parameter))
327 #define scic_sds_remote_node_context_suspend(rnc, suspend_type, callback, parameter) \
328 ((rnc)->state_handlers->suspend_handler(rnc, suspend_type, callback, parameter))
330 #define scic_sds_remote_node_context_destruct(rnc, callback, parameter) \
331 ((rnc)->state_handlers->destruct_handler(rnc, callback, parameter))
333 #define scic_sds_remote_node_context_start_io(rnc, request) \
334 ((rnc)->state_handlers->start_io_handler(rnc, request))
336 #define scic_sds_remote_node_context_start_task(rnc, task) \
337 ((rnc)->state_handlers->start_task_handler(rnc, task))
339 /* --------------------------------------------------------------------------- */
341 #endif /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */