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59 #include <scsi/libsas.h>
64 #define SCIC_SDS_DUMMY_PORT 0xFF
73 isci_ready_for_io = 0x03,
79 * struct scic_sds_port
81 * The core port object provides the the abstraction for an SCU port.
83 struct scic_sds_port {
85 * This field contains the information for the base port state machine.
87 struct sci_base_state_machine state_machine;
92 * This field is the port index that is reported to the SCI USER.
93 * This allows the actual hardware physical port to change without
94 * the SCI USER getting a different answer for the get port index.
96 u8 logical_port_index;
99 * This field is the port index used to program the SCU hardware.
101 u8 physical_port_index;
104 * This field contains the active phy mask for the port.
105 * This mask is used in conjunction with the phy state to determine
106 * which phy to select for some port operations.
114 * This field contains the count of the io requests started on this port
115 * object. It is used to control controller shutdown.
117 u32 started_request_count;
120 * This field contains the number of devices assigned to this port.
121 * It is used to control port start requests.
123 u32 assigned_device_count;
126 * This field contains the reason for the port not going ready. It is
127 * assigned in the state handlers and used in the state transition.
129 u32 not_ready_reason;
132 * This field is the table of phys assigned to the port.
134 struct scic_sds_phy *phy_table[SCI_MAX_PHYS];
137 * This field is a pointer back to the controller that owns this
140 struct scic_sds_controller *owning_controller;
143 * This field contains the port start/stop timer handle.
148 * This field points to the current set of state handlers for this port
149 * object. These state handlers are assigned at each enter state of
152 struct scic_sds_port_state_handler *state_handlers;
154 /* / Memory mapped hardware register space */
157 * This field is the pointer to the port task scheduler registers
158 * for the SCU hardware.
160 struct scu_port_task_scheduler_registers __iomem
161 *port_task_scheduler_registers;
164 * This field is identical for all port objects and points to the port
165 * task scheduler group PE configuration registers.
166 * It is used to assign PEs to a port.
168 u32 __iomem *port_pe_configuration_register;
171 * This field is the VIIT register space for ths port object.
173 struct scu_viit_entry __iomem *viit_registers;
179 * struct isci_port - This class represents the port object used to internally
180 * represent libsas port objects. It also keeps a list of remote device
186 enum isci_status status;
187 struct isci_host *isci_host;
188 struct asd_sas_port sas_port;
189 struct list_head remote_dev_list;
190 spinlock_t state_lock;
191 struct list_head domain_dev_list;
192 struct completion start_complete;
193 struct completion hard_reset_complete;
194 enum sci_status hard_reset_status;
195 struct scic_sds_port sci;
198 static inline struct isci_port *sci_port_to_iport(struct scic_sds_port *sci_port)
200 struct isci_port *iport = container_of(sci_port, typeof(*iport), sci);
205 enum scic_port_not_ready_reason_code {
206 SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS,
207 SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED,
208 SCIC_PORT_NOT_READY_INVALID_PORT_CONFIGURATION,
209 SCIC_PORT_NOT_READY_RECONFIGURING,
211 SCIC_PORT_NOT_READY_REASON_CODE_MAX
214 struct scic_port_end_point_properties {
215 struct sci_sas_address sas_address;
216 struct scic_phy_proto protocols;
219 struct scic_port_properties {
221 struct scic_port_end_point_properties local;
222 struct scic_port_end_point_properties remote;
227 * enum scic_sds_port_states - This enumeration depicts all the states for the
228 * common port state machine.
232 enum scic_sds_port_states {
234 * This state indicates that the port has successfully been stopped.
235 * In this state no new IO operations are permitted.
236 * This state is entered from the STOPPING state.
238 SCI_BASE_PORT_STATE_STOPPED,
241 * This state indicates that the port is in the process of stopping.
242 * In this state no new IO operations are permitted, but existing IO
243 * operations are allowed to complete.
244 * This state is entered from the READY state.
246 SCI_BASE_PORT_STATE_STOPPING,
249 * This state indicates the port is now ready. Thus, the user is
250 * able to perform IO operations on this port.
251 * This state is entered from the STARTING state.
253 SCI_BASE_PORT_STATE_READY,
256 * The substate where the port is started and ready but has no
259 SCIC_SDS_PORT_READY_SUBSTATE_WAITING,
262 * The substate where the port is started and ready and there is
263 * at least one phy operational.
265 SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL,
268 * The substate where the port is started and there was an
269 * add/remove phy event. This state is only used in Automatic
270 * Port Configuration Mode (APC)
272 SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING,
275 * This state indicates the port is in the process of performing a hard
276 * reset. Thus, the user is unable to perform IO operations on this
278 * This state is entered from the READY state.
280 SCI_BASE_PORT_STATE_RESETTING,
283 * This state indicates the port has failed a reset request. This state
284 * is entered when a port reset request times out.
285 * This state is entered from the RESETTING state.
287 SCI_BASE_PORT_STATE_FAILED,
289 SCI_BASE_PORT_MAX_STATES
293 struct scic_sds_remote_device;
294 struct scic_sds_request;
296 typedef enum sci_status (*scic_sds_port_handler_t)(struct scic_sds_port *);
298 typedef enum sci_status (*scic_sds_port_phy_handler_t)(struct scic_sds_port *,
299 struct scic_sds_phy *);
301 typedef enum sci_status (*scic_sds_port_reset_handler_t)(struct scic_sds_port *,
304 typedef enum sci_status (*scic_sds_port_event_handler_t)(struct scic_sds_port *, u32);
306 typedef enum sci_status (*scic_sds_port_frame_handler_t)(struct scic_sds_port *, u32);
308 typedef void (*scic_sds_port_link_handler_t)(struct scic_sds_port *, struct scic_sds_phy *);
310 typedef enum sci_status (*scic_sds_port_io_request_handler_t)(struct scic_sds_port *,
311 struct scic_sds_remote_device *,
312 struct scic_sds_request *);
314 struct scic_sds_port_state_handler {
316 * The reset_handler specifies the method invoked when a user
317 * attempts to hard reset a port.
319 scic_sds_port_reset_handler_t reset_handler;
322 * The add_phy_handler specifies the method invoked when a user
323 * attempts to add another phy into the port.
325 scic_sds_port_phy_handler_t add_phy_handler;
328 * The remove_phy_handler specifies the method invoked when a user
329 * attempts to remove a phy from the port.
331 scic_sds_port_phy_handler_t remove_phy_handler;
333 scic_sds_port_frame_handler_t frame_handler;
334 scic_sds_port_event_handler_t event_handler;
336 scic_sds_port_link_handler_t link_up_handler;
337 scic_sds_port_link_handler_t link_down_handler;
339 scic_sds_port_io_request_handler_t start_io_handler;
340 scic_sds_port_io_request_handler_t complete_io_handler;
345 * scic_sds_port_get_controller() -
347 * Helper macro to get the owning controller of this port
349 #define scic_sds_port_get_controller(this_port) \
350 ((this_port)->owning_controller)
353 * scic_sds_port_set_base_state_handlers() -
355 * This macro will change the state handlers to those of the specified state id
357 #define scic_sds_port_set_base_state_handlers(this_port, state_id) \
358 scic_sds_port_set_state_handlers(\
359 (this_port), &scic_sds_port_state_handler_table[(state_id)])
362 * scic_sds_port_set_state_handlers() -
364 * Helper macro to set the port object state handlers
366 #define scic_sds_port_set_state_handlers(this_port, handlers) \
367 ((this_port)->state_handlers = (handlers))
370 * scic_sds_port_get_index() -
372 * This macro returns the physical port index for this port object
374 #define scic_sds_port_get_index(this_port) \
375 ((this_port)->physical_port_index)
378 static inline void scic_sds_port_decrement_request_count(struct scic_sds_port *sci_port)
380 if (WARN_ONCE(sci_port->started_request_count == 0,
381 "%s: tried to decrement started_request_count past 0!?",
385 sci_port->started_request_count--;
388 #define scic_sds_port_active_phy(port, phy) \
389 (((port)->active_phy_mask & (1 << (phy)->phy_index)) != 0)
391 void scic_sds_port_construct(
392 struct scic_sds_port *sci_port,
394 struct scic_sds_controller *scic);
396 enum sci_status scic_sds_port_initialize(
397 struct scic_sds_port *sci_port,
398 void __iomem *port_task_scheduler_registers,
399 void __iomem *port_configuration_regsiter,
400 void __iomem *viit_registers);
402 enum sci_status scic_sds_port_start(struct scic_sds_port *sci_port);
403 enum sci_status scic_sds_port_stop(struct scic_sds_port *sci_port);
405 enum sci_status scic_sds_port_add_phy(
406 struct scic_sds_port *sci_port,
407 struct scic_sds_phy *sci_phy);
409 enum sci_status scic_sds_port_remove_phy(
410 struct scic_sds_port *sci_port,
411 struct scic_sds_phy *sci_phy);
413 void scic_sds_port_setup_transports(
414 struct scic_sds_port *sci_port,
418 void scic_sds_port_deactivate_phy(
419 struct scic_sds_port *sci_port,
420 struct scic_sds_phy *sci_phy,
421 bool do_notify_user);
423 bool scic_sds_port_link_detected(
424 struct scic_sds_port *sci_port,
425 struct scic_sds_phy *sci_phy);
427 void scic_sds_port_link_up(
428 struct scic_sds_port *sci_port,
429 struct scic_sds_phy *sci_phy);
431 void scic_sds_port_link_down(
432 struct scic_sds_port *sci_port,
433 struct scic_sds_phy *sci_phy);
435 enum sci_status scic_sds_port_start_io(
436 struct scic_sds_port *sci_port,
437 struct scic_sds_remote_device *sci_dev,
438 struct scic_sds_request *sci_req);
440 enum sci_status scic_sds_port_complete_io(
441 struct scic_sds_port *sci_port,
442 struct scic_sds_remote_device *sci_dev,
443 struct scic_sds_request *sci_req);
445 enum sas_linkrate scic_sds_port_get_max_allowed_speed(
446 struct scic_sds_port *sci_port);
448 void scic_sds_port_broadcast_change_received(
449 struct scic_sds_port *sci_port,
450 struct scic_sds_phy *sci_phy);
452 bool scic_sds_port_is_valid_phy_assignment(
453 struct scic_sds_port *sci_port,
456 void scic_sds_port_get_sas_address(
457 struct scic_sds_port *sci_port,
458 struct sci_sas_address *sas_address);
460 void scic_sds_port_get_attached_sas_address(
461 struct scic_sds_port *sci_port,
462 struct sci_sas_address *sas_address);
464 enum isci_status isci_port_get_state(
465 struct isci_port *isci_port);
467 void isci_port_formed(struct asd_sas_phy *);
468 void isci_port_deformed(struct asd_sas_phy *);
471 struct isci_port *port,
472 struct isci_host *host,
475 int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
476 struct isci_phy *iphy);
477 #endif /* !defined(_ISCI_PORT_H_) */