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59 #include <scsi/libsas.h>
60 #include "state_machine.h"
62 /* This is the timeout value for the SATA phy to wait for a SIGNATURE FIS
63 * before restarting the starting state machine. Technically, the old parallel
64 * ATA specification required up to 30 seconds for a device to issue its
65 * signature FIS as a result of a soft reset. Now we see that devices respond
66 * generally within 15 seconds, but we'll use 25 for now.
68 #define SCIC_SDS_SIGNATURE_FIS_TIMEOUT 25000
70 /* This is the timeout for the SATA OOB/SN because the hardware does not
71 * recognize a hot plug after OOB signal but before the SN signals. We need to
72 * make sure after a hotplug timeout if we have not received the speed event
73 * notification from the hardware that we restart the hardware OOB state
76 #define SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT 250
78 enum scic_sds_phy_protocol {
79 SCIC_SDS_PHY_PROTOCOL_UNKNOWN,
80 SCIC_SDS_PHY_PROTOCOL_SAS,
81 SCIC_SDS_PHY_PROTOCOL_SATA,
82 SCIC_SDS_MAX_PHY_PROTOCOLS
86 * struct scic_sds_phy - This structure contains or references all of the data
87 * necessary to represent the core phy object and SCU harware protocol
94 * This field contains the information for the base phy state machine.
96 struct sci_base_state_machine state_machine;
99 * This field specifies the port object that owns/contains this phy.
101 struct scic_sds_port *owning_port;
104 * This field indicates whether the phy supports 1.5 Gb/s, 3.0 Gb/s,
105 * or 6.0 Gb/s operation.
107 enum sas_linkrate max_negotiated_speed;
110 * This member specifies the protocol being utilized on this phy. This
111 * field contains a legitamite value once the PHY has link trained with
114 enum scic_sds_phy_protocol protocol;
117 * This field specifies the index with which this phy is associated (0-3).
122 * This member indicates if this particular PHY has received a BCN while
123 * it had no port assignement. This BCN will be reported once the phy is
124 * assigned to a port.
126 bool bcn_received_while_port_unassigned;
129 * This field indicates if this PHY is currently in the process of
130 * link training (i.e. it has started OOB, but has yet to perform
131 * IAF exchange/Signature FIS reception).
133 bool is_in_link_training;
136 * This field contains a reference to the timer utilized in detecting
137 * when a signature FIS timeout has occurred. The signature FIS is the
138 * first FIS sent by an attached SATA device after OOB/SN.
140 void *sata_timeout_timer;
142 const struct scic_sds_phy_state_handler *state_handlers;
144 struct sci_base_state_machine starting_substate_machine;
147 * This field is the pointer to the transport layer register for the SCU
150 struct scu_transport_layer_registers __iomem *transport_layer_registers;
153 * This field points to the link layer register set within the SCU.
155 struct scu_link_layer_registers __iomem *link_layer_registers;
161 struct scic_sds_phy sci;
162 struct asd_sas_phy sas_phy;
163 struct isci_port *isci_port;
164 u8 sas_addr[SAS_ADDR_SIZE];
167 struct sas_identify_frame iaf;
168 struct dev_to_host_fis fis;
172 static inline struct isci_phy *to_isci_phy(struct asd_sas_phy *sas_phy)
174 struct isci_phy *iphy = container_of(sas_phy, typeof(*iphy), sas_phy);
179 static inline struct isci_phy *sci_phy_to_iphy(struct scic_sds_phy *sci_phy)
181 struct isci_phy *iphy = container_of(sci_phy, typeof(*iphy), sci);
186 struct scic_phy_cap {
190 * The SAS specification indicates the start bit shall
192 * 1. This implementation will have the start bit set
193 * to 0 if the PHY CAPABILITIES were either not
194 * received or speed negotiation failed.
199 u8 req_logical_linkrate:4;
214 /* this data structure reflects the link layer transmit identification reg */
215 struct scic_phy_proto {
235 * struct scic_phy_properties - This structure defines the properties common to
236 * all phys that can be retrieved.
240 struct scic_phy_properties {
242 * This field specifies the port that currently contains the
243 * supplied phy. This field may be set to NULL
244 * if the phy is not currently contained in a port.
246 struct scic_sds_port *owning_port;
249 * This field specifies the link rate at which the phy is
250 * currently operating.
252 enum sas_linkrate negotiated_link_rate;
255 * This field specifies the index of the phy in relation to other
256 * phys within the controller. This index is zero relative.
262 * struct scic_sas_phy_properties - This structure defines the properties,
263 * specific to a SAS phy, that can be retrieved.
267 struct scic_sas_phy_properties {
269 * This field delineates the Identify Address Frame received
270 * from the remote end point.
272 struct sas_identify_frame rcvd_iaf;
275 * This field delineates the Phy capabilities structure received
276 * from the remote end point.
278 struct scic_phy_cap rcvd_cap;
283 * struct scic_sata_phy_properties - This structure defines the properties,
284 * specific to a SATA phy, that can be retrieved.
288 struct scic_sata_phy_properties {
290 * This field delineates the signature FIS received from the
293 struct dev_to_host_fis signature_fis;
296 * This field specifies to the user if a port selector is connected
297 * on the specified phy.
299 bool is_port_selector_present;
304 * enum scic_phy_counter_id - This enumeration depicts the various pieces of
305 * optional information that can be retrieved for a specific phy.
309 enum scic_phy_counter_id {
311 * This PHY information field tracks the number of frames received.
313 SCIC_PHY_COUNTER_RECEIVED_FRAME,
316 * This PHY information field tracks the number of frames transmitted.
318 SCIC_PHY_COUNTER_TRANSMITTED_FRAME,
321 * This PHY information field tracks the number of DWORDs received.
323 SCIC_PHY_COUNTER_RECEIVED_FRAME_WORD,
326 * This PHY information field tracks the number of DWORDs transmitted.
328 SCIC_PHY_COUNTER_TRANSMITTED_FRAME_DWORD,
331 * This PHY information field tracks the number of times DWORD
332 * synchronization was lost.
334 SCIC_PHY_COUNTER_LOSS_OF_SYNC_ERROR,
337 * This PHY information field tracks the number of received DWORDs with
338 * running disparity errors.
340 SCIC_PHY_COUNTER_RECEIVED_DISPARITY_ERROR,
343 * This PHY information field tracks the number of received frames with a
344 * CRC error (not including short or truncated frames).
346 SCIC_PHY_COUNTER_RECEIVED_FRAME_CRC_ERROR,
349 * This PHY information field tracks the number of DONE (ACK/NAK TIMEOUT)
350 * primitives received.
352 SCIC_PHY_COUNTER_RECEIVED_DONE_ACK_NAK_TIMEOUT,
355 * This PHY information field tracks the number of DONE (ACK/NAK TIMEOUT)
356 * primitives transmitted.
358 SCIC_PHY_COUNTER_TRANSMITTED_DONE_ACK_NAK_TIMEOUT,
361 * This PHY information field tracks the number of times the inactivity
362 * timer for connections on the phy has been utilized.
364 SCIC_PHY_COUNTER_INACTIVITY_TIMER_EXPIRED,
367 * This PHY information field tracks the number of DONE (CREDIT TIMEOUT)
368 * primitives received.
370 SCIC_PHY_COUNTER_RECEIVED_DONE_CREDIT_TIMEOUT,
373 * This PHY information field tracks the number of DONE (CREDIT TIMEOUT)
374 * primitives transmitted.
376 SCIC_PHY_COUNTER_TRANSMITTED_DONE_CREDIT_TIMEOUT,
379 * This PHY information field tracks the number of CREDIT BLOCKED
380 * primitives received.
381 * @note Depending on remote device implementation, credit blocks
382 * may occur regularly.
384 SCIC_PHY_COUNTER_RECEIVED_CREDIT_BLOCKED,
387 * This PHY information field contains the number of short frames
388 * received. A short frame is simply a frame smaller then what is
389 * allowed by either the SAS or SATA specification.
391 SCIC_PHY_COUNTER_RECEIVED_SHORT_FRAME,
394 * This PHY information field contains the number of frames received after
395 * credit has been exhausted.
397 SCIC_PHY_COUNTER_RECEIVED_FRAME_WITHOUT_CREDIT,
400 * This PHY information field contains the number of frames received after
401 * a DONE has been received.
403 SCIC_PHY_COUNTER_RECEIVED_FRAME_AFTER_DONE,
406 * This PHY information field contains the number of times the phy
407 * failed to achieve DWORD synchronization during speed negotiation.
409 SCIC_PHY_COUNTER_SN_DWORD_SYNC_ERROR
412 enum scic_sds_phy_states {
414 * Simply the initial state for the base domain state machine.
416 SCI_BASE_PHY_STATE_INITIAL,
419 * This state indicates that the phy has successfully been stopped.
420 * In this state no new IO operations are permitted on this phy.
421 * This state is entered from the INITIAL state.
422 * This state is entered from the STARTING state.
423 * This state is entered from the READY state.
424 * This state is entered from the RESETTING state.
426 SCI_BASE_PHY_STATE_STOPPED,
429 * This state indicates that the phy is in the process of becomming
430 * ready. In this state no new IO operations are permitted on this phy.
431 * This state is entered from the STOPPED state.
432 * This state is entered from the READY state.
433 * This state is entered from the RESETTING state.
435 SCI_BASE_PHY_STATE_STARTING,
438 * This state indicates the the phy is now ready. Thus, the user
439 * is able to perform IO operations utilizing this phy as long as it
440 * is currently part of a valid port.
441 * This state is entered from the STARTING state.
443 SCI_BASE_PHY_STATE_READY,
446 * This state indicates that the phy is in the process of being reset.
447 * In this state no new IO operations are permitted on this phy.
448 * This state is entered from the READY state.
450 SCI_BASE_PHY_STATE_RESETTING,
453 * Simply the final state for the base phy state machine.
455 SCI_BASE_PHY_STATE_FINAL,
460 * enum scic_sds_phy_starting_substates -
464 enum scic_sds_phy_starting_substates {
468 SCIC_SDS_PHY_STARTING_SUBSTATE_INITIAL,
471 * Wait state for the hardware OSSP event type notification
473 SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_OSSP_EN,
476 * Wait state for the PHY speed notification
478 SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_SPEED_EN,
481 * Wait state for the IAF Unsolicited frame notification
483 SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_IAF_UF,
486 * Wait state for the request to consume power
488 SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SAS_POWER,
491 * Wait state for request to consume power
493 SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_POWER,
496 * Wait state for the SATA PHY notification
498 SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_PHY_EN,
501 * Wait for the SATA PHY speed notification
503 SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SATA_SPEED_EN,
506 * Wait state for the SIGNATURE FIS unsolicited frame notification
508 SCIC_SDS_PHY_STARTING_SUBSTATE_AWAIT_SIG_FIS_UF,
511 * Exit state for this state machine
513 SCIC_SDS_PHY_STARTING_SUBSTATE_FINAL,
518 typedef enum sci_status (*scic_sds_phy_handler_t)(struct scic_sds_phy *);
519 typedef enum sci_status (*scic_sds_phy_event_handler_t)(struct scic_sds_phy *, u32);
520 typedef enum sci_status (*scic_sds_phy_frame_handler_t)(struct scic_sds_phy *, u32);
521 typedef enum sci_status (*scic_sds_phy_power_handler_t)(struct scic_sds_phy *);
523 struct scic_sds_phy_state_handler {
525 * The start_handler specifies the method invoked when there is an
526 * attempt to start a phy.
528 scic_sds_phy_handler_t start_handler;
531 * The stop_handler specifies the method invoked when there is an
532 * attempt to stop a phy.
534 scic_sds_phy_handler_t stop_handler;
537 * The reset_handler specifies the method invoked when there is an
538 * attempt to reset a phy.
540 scic_sds_phy_handler_t reset_handler;
543 * The destruct_handler specifies the method invoked when attempting to
546 scic_sds_phy_handler_t destruct_handler;
549 * The state handler for unsolicited frames received from the SCU hardware.
551 scic_sds_phy_frame_handler_t frame_handler;
554 * The state handler for events received from the SCU hardware.
556 scic_sds_phy_event_handler_t event_handler;
559 * The state handler for staggered spinup.
561 scic_sds_phy_power_handler_t consume_power_handler;
566 * scic_sds_phy_get_index() -
568 * This macro returns the phy index for the specified phy
570 #define scic_sds_phy_get_index(phy) \
574 * scic_sds_phy_get_controller() - This macro returns the controller for this
579 #define scic_sds_phy_get_controller(phy) \
580 (scic_sds_port_get_controller((phy)->owning_port))
583 * scic_sds_phy_set_state_handlers() - This macro sets the state handlers for
588 #define scic_sds_phy_set_state_handlers(phy, handlers) \
589 ((phy)->state_handlers = (handlers))
592 * scic_sds_phy_set_base_state_handlers() -
594 * This macro set the base state handlers for the phy object.
596 #define scic_sds_phy_set_base_state_handlers(phy, state_id) \
597 scic_sds_phy_set_state_handlers(\
599 &scic_sds_phy_state_handler_table[(state_id)] \
602 void scic_sds_phy_construct(
603 struct scic_sds_phy *this_phy,
604 struct scic_sds_port *owning_port,
607 struct scic_sds_port *scic_sds_phy_get_port(
608 struct scic_sds_phy *this_phy);
610 void scic_sds_phy_set_port(
611 struct scic_sds_phy *this_phy,
612 struct scic_sds_port *owning_port);
614 enum sci_status scic_sds_phy_initialize(
615 struct scic_sds_phy *this_phy,
616 struct scu_transport_layer_registers __iomem *transport_layer_registers,
617 struct scu_link_layer_registers __iomem *link_layer_registers);
619 enum sci_status scic_sds_phy_start(
620 struct scic_sds_phy *this_phy);
622 enum sci_status scic_sds_phy_stop(
623 struct scic_sds_phy *this_phy);
625 enum sci_status scic_sds_phy_reset(
626 struct scic_sds_phy *this_phy);
628 void scic_sds_phy_resume(
629 struct scic_sds_phy *this_phy);
631 void scic_sds_phy_setup_transport(
632 struct scic_sds_phy *this_phy,
635 enum sci_status scic_sds_phy_event_handler(
636 struct scic_sds_phy *this_phy,
639 enum sci_status scic_sds_phy_frame_handler(
640 struct scic_sds_phy *this_phy,
643 enum sci_status scic_sds_phy_consume_power_handler(
644 struct scic_sds_phy *this_phy);
646 void scic_sds_phy_get_sas_address(
647 struct scic_sds_phy *this_phy,
648 struct sci_sas_address *sas_address);
650 void scic_sds_phy_get_attached_sas_address(
651 struct scic_sds_phy *this_phy,
652 struct sci_sas_address *sas_address);
654 struct scic_phy_proto;
655 void scic_sds_phy_get_protocols(
656 struct scic_sds_phy *sci_phy,
657 struct scic_phy_proto *protocols);
658 enum sas_linkrate sci_phy_linkrate(struct scic_sds_phy *sci_phy);
661 void isci_phy_init(struct isci_phy *iphy, struct isci_host *ihost, int index);
662 int isci_phy_control(struct asd_sas_phy *phy, enum phy_func func, void *buf);
664 #endif /* !defined(_ISCI_PHY_H_) */