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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 sm;
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;
142 /* timer used for port start/stop operations */
143 struct sci_timer timer;
146 * This field is the pointer to the port task scheduler registers
147 * for the SCU hardware.
149 struct scu_port_task_scheduler_registers __iomem
150 *port_task_scheduler_registers;
153 * This field is identical for all port objects and points to the port
154 * task scheduler group PE configuration registers.
155 * It is used to assign PEs to a port.
157 u32 __iomem *port_pe_configuration_register;
160 * This field is the VIIT register space for ths port object.
162 struct scu_viit_entry __iomem *viit_registers;
168 * struct isci_port - This class represents the port object used to internally
169 * represent libsas port objects. It also keeps a list of remote device
175 enum isci_status status;
176 #define IPORT_BCN_BLOCKED 0
177 #define IPORT_BCN_PENDING 1
180 struct isci_host *isci_host;
181 struct asd_sas_port sas_port;
182 struct list_head remote_dev_list;
183 spinlock_t state_lock;
184 struct list_head domain_dev_list;
185 struct completion start_complete;
186 struct completion hard_reset_complete;
187 enum sci_status hard_reset_status;
188 struct scic_sds_port sci;
191 static inline struct isci_port *sci_port_to_iport(struct scic_sds_port *sci_port)
193 struct isci_port *iport = container_of(sci_port, typeof(*iport), sci);
198 enum scic_port_not_ready_reason_code {
199 SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS,
200 SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED,
201 SCIC_PORT_NOT_READY_INVALID_PORT_CONFIGURATION,
202 SCIC_PORT_NOT_READY_RECONFIGURING,
204 SCIC_PORT_NOT_READY_REASON_CODE_MAX
207 struct scic_port_end_point_properties {
208 struct sci_sas_address sas_address;
209 struct scic_phy_proto protocols;
212 struct scic_port_properties {
214 struct scic_port_end_point_properties local;
215 struct scic_port_end_point_properties remote;
220 * enum scic_sds_port_states - This enumeration depicts all the states for the
221 * common port state machine.
225 enum scic_sds_port_states {
227 * This state indicates that the port has successfully been stopped.
228 * In this state no new IO operations are permitted.
229 * This state is entered from the STOPPING state.
234 * This state indicates that the port is in the process of stopping.
235 * In this state no new IO operations are permitted, but existing IO
236 * operations are allowed to complete.
237 * This state is entered from the READY state.
242 * This state indicates the port is now ready. Thus, the user is
243 * able to perform IO operations on this port.
244 * This state is entered from the STARTING state.
249 * The substate where the port is started and ready but has no
252 SCI_PORT_SUB_WAITING,
255 * The substate where the port is started and ready and there is
256 * at least one phy operational.
258 SCI_PORT_SUB_OPERATIONAL,
261 * The substate where the port is started and there was an
262 * add/remove phy event. This state is only used in Automatic
263 * Port Configuration Mode (APC)
265 SCI_PORT_SUB_CONFIGURING,
268 * This state indicates the port is in the process of performing a hard
269 * reset. Thus, the user is unable to perform IO operations on this
271 * This state is entered from the READY state.
276 * This state indicates the port has failed a reset request. This state
277 * is entered when a port reset request times out.
278 * This state is entered from the RESETTING state.
286 * scic_sds_port_get_controller() -
288 * Helper macro to get the owning controller of this port
290 #define scic_sds_port_get_controller(this_port) \
291 ((this_port)->owning_controller)
294 * scic_sds_port_get_index() -
296 * This macro returns the physical port index for this port object
298 #define scic_sds_port_get_index(this_port) \
299 ((this_port)->physical_port_index)
302 static inline void scic_sds_port_decrement_request_count(struct scic_sds_port *sci_port)
304 if (WARN_ONCE(sci_port->started_request_count == 0,
305 "%s: tried to decrement started_request_count past 0!?",
309 sci_port->started_request_count--;
312 #define scic_sds_port_active_phy(port, phy) \
313 (((port)->active_phy_mask & (1 << (phy)->phy_index)) != 0)
315 void scic_sds_port_construct(
316 struct scic_sds_port *sci_port,
318 struct scic_sds_controller *scic);
320 enum sci_status scic_sds_port_initialize(
321 struct scic_sds_port *sci_port,
322 void __iomem *port_task_scheduler_registers,
323 void __iomem *port_configuration_regsiter,
324 void __iomem *viit_registers);
326 enum sci_status scic_sds_port_start(struct scic_sds_port *sci_port);
327 enum sci_status scic_sds_port_stop(struct scic_sds_port *sci_port);
329 enum sci_status scic_sds_port_add_phy(
330 struct scic_sds_port *sci_port,
331 struct scic_sds_phy *sci_phy);
333 enum sci_status scic_sds_port_remove_phy(
334 struct scic_sds_port *sci_port,
335 struct scic_sds_phy *sci_phy);
337 void scic_sds_port_setup_transports(
338 struct scic_sds_port *sci_port,
341 void isci_port_bcn_enable(struct isci_host *, struct isci_port *);
343 void scic_sds_port_deactivate_phy(
344 struct scic_sds_port *sci_port,
345 struct scic_sds_phy *sci_phy,
346 bool do_notify_user);
348 bool scic_sds_port_link_detected(
349 struct scic_sds_port *sci_port,
350 struct scic_sds_phy *sci_phy);
352 enum sci_status scic_sds_port_link_up(struct scic_sds_port *sci_port,
353 struct scic_sds_phy *sci_phy);
354 enum sci_status scic_sds_port_link_down(struct scic_sds_port *sci_port,
355 struct scic_sds_phy *sci_phy);
357 struct scic_sds_request;
358 struct scic_sds_remote_device;
359 enum sci_status scic_sds_port_start_io(
360 struct scic_sds_port *sci_port,
361 struct scic_sds_remote_device *sci_dev,
362 struct scic_sds_request *sci_req);
364 enum sci_status scic_sds_port_complete_io(
365 struct scic_sds_port *sci_port,
366 struct scic_sds_remote_device *sci_dev,
367 struct scic_sds_request *sci_req);
369 enum sas_linkrate scic_sds_port_get_max_allowed_speed(
370 struct scic_sds_port *sci_port);
372 void scic_sds_port_broadcast_change_received(
373 struct scic_sds_port *sci_port,
374 struct scic_sds_phy *sci_phy);
376 bool scic_sds_port_is_valid_phy_assignment(
377 struct scic_sds_port *sci_port,
380 void scic_sds_port_get_sas_address(
381 struct scic_sds_port *sci_port,
382 struct sci_sas_address *sas_address);
384 void scic_sds_port_get_attached_sas_address(
385 struct scic_sds_port *sci_port,
386 struct sci_sas_address *sas_address);
388 enum isci_status isci_port_get_state(
389 struct isci_port *isci_port);
391 void isci_port_formed(struct asd_sas_phy *);
392 void isci_port_deformed(struct asd_sas_phy *);
395 struct isci_port *port,
396 struct isci_host *host,
399 int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
400 struct isci_phy *iphy);
401 #endif /* !defined(_ISCI_PORT_H_) */