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57 * This file contains the isci port implementation.
63 #include <linux/workqueue.h>
65 #include "scic_io_request.h"
66 #include "scic_remote_device.h"
68 #include "scic_sds_phy.h"
69 #include "scic_port.h"
73 static void isci_port_change_state(
74 struct isci_port *isci_port,
75 enum isci_status status);
80 * isci_port_init() - This function initializes the given isci_port object.
81 * @isci_port: This parameter specifies the port object to be initialized.
82 * @isci_host: This parameter specifies parent controller object for the port.
83 * @index: This parameter specifies which SCU port the isci_port associates
84 * with. Generally, SCU port 0 relates to isci_port 0, etc.
88 struct isci_port *isci_port,
89 struct isci_host *isci_host,
92 struct scic_sds_port *scic_port;
93 struct scic_sds_controller *controller = isci_host->core_controller;
95 INIT_LIST_HEAD(&isci_port->remote_dev_list);
96 INIT_LIST_HEAD(&isci_port->domain_dev_list);
97 spin_lock_init(&isci_port->state_lock);
98 init_completion(&isci_port->start_complete);
99 isci_port->isci_host = isci_host;
100 isci_port_change_state(isci_port, isci_freed);
102 (void)scic_controller_get_port_handle(controller, index, &scic_port);
103 sci_object_set_association(scic_port, isci_port);
104 isci_port->sci_port_handle = scic_port;
109 * isci_port_get_state() - This function gets the status of the port object.
110 * @isci_port: This parameter points to the isci_port object
112 * status of the object as a isci_status enum.
114 enum isci_status isci_port_get_state(
115 struct isci_port *isci_port)
117 return isci_port->status;
120 static void isci_port_change_state(
121 struct isci_port *isci_port,
122 enum isci_status status)
126 dev_dbg(&isci_port->isci_host->pdev->dev,
127 "%s: isci_port = %p, state = 0x%x\n",
128 __func__, isci_port, status);
130 spin_lock_irqsave(&isci_port->state_lock, flags);
131 isci_port->status = status;
132 spin_unlock_irqrestore(&isci_port->state_lock, flags);
135 void isci_port_bc_change_received(
136 struct isci_host *isci_host,
137 struct scic_sds_port *port,
138 struct scic_sds_phy *phy)
140 struct isci_phy *isci_phy =
141 (struct isci_phy *)sci_object_get_association(phy);
143 dev_dbg(&isci_host->pdev->dev,
144 "%s: isci_phy = %p, sas_phy = %p\n",
149 isci_host->sas_ha.notify_port_event(
154 scic_port_enable_broadcast_change_notification(port);
158 * isci_port_link_up() - This function is called by the sci core when a link
159 * becomes active. the identify address frame is retrieved from the core and
160 * a notify port event is sent to libsas.
161 * @isci_host: This parameter specifies the isci host object.
162 * @port: This parameter specifies the sci port with the active link.
163 * @phy: This parameter specifies the sci phy with the active link.
166 void isci_port_link_up(
167 struct isci_host *isci_host,
168 struct scic_sds_port *port,
169 struct scic_sds_phy *phy)
172 struct scic_port_properties properties;
173 struct isci_phy *isci_phy
174 = (struct isci_phy *)sci_object_get_association(phy);
175 struct isci_port *isci_port
176 = (struct isci_port *)sci_object_get_association(port);
177 enum sci_status call_status;
178 unsigned long success = true;
180 BUG_ON(isci_phy->isci_port != NULL);
181 isci_phy->isci_port = isci_port;
183 dev_dbg(&isci_host->pdev->dev,
184 "%s: isci_port = %p\n",
185 __func__, isci_port);
187 spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags);
189 isci_port_change_state(isci_phy->isci_port, isci_starting);
191 scic_port_get_properties(port, &properties);
193 if (properties.remote.protocols.u.bits.stp_target) {
194 u64 attached_sas_address;
196 struct scic_sata_phy_properties sata_phy_properties;
198 isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
200 /* Get a copy of the signature fis for libsas */
201 call_status = scic_sata_phy_get_properties(phy,
202 &sata_phy_properties);
205 * XXX I am concerned about this "assert". shouldn't we
206 * handle the return appropriately?
208 BUG_ON(call_status != SCI_SUCCESS);
210 memcpy(isci_phy->frame_rcvd.fis,
211 &sata_phy_properties.signature_fis,
212 sizeof(struct sata_fis_reg_d2h));
214 isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sata_fis_reg_d2h);
217 * For direct-attached SATA devices, the SCI core will
218 * automagically assign a SAS address to the end device
219 * for the purpose of creating a port. This SAS address
220 * will not be the same as assigned to the PHY and needs
221 * to be obtained from struct scic_port_properties properties.
223 attached_sas_address = properties.remote.sas_address.high;
224 attached_sas_address <<= 32;
225 attached_sas_address |= properties.remote.sas_address.low;
226 swab64s(&attached_sas_address);
228 memcpy(&isci_phy->sas_phy.attached_sas_addr,
229 &attached_sas_address, sizeof(attached_sas_address));
231 } else if (properties.remote.protocols.u.bits.ssp_target ||
232 properties.remote.protocols.u.bits.smp_target) {
234 struct scic_sas_phy_properties sas_phy_properties;
236 isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
238 /* Get a copy of the identify address frame for libsas */
239 call_status = scic_sas_phy_get_properties(phy,
240 &sas_phy_properties);
242 BUG_ON(call_status != SCI_SUCCESS);
244 memcpy(isci_phy->frame_rcvd.aif,
245 &(sas_phy_properties.received_iaf),
246 sizeof(struct sci_sas_identify_address_frame));
248 isci_phy->sas_phy.frame_rcvd_size
249 = sizeof(struct sci_sas_identify_address_frame);
251 /* Copy the attached SAS address from the IAF */
252 memcpy(isci_phy->sas_phy.attached_sas_addr,
253 ((struct sas_identify_frame *)
254 (&isci_phy->frame_rcvd.aif))->sas_addr,
258 dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
262 isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
264 spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags);
266 /* Notify libsas that we have an address frame, if indeed
267 * we've found an SSP, SMP, or STP target */
269 isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy,
275 * isci_port_link_down() - This function is called by the sci core when a link
277 * @isci_host: This parameter specifies the isci host object.
278 * @phy: This parameter specifies the isci phy with the active link.
279 * @port: This parameter specifies the isci port with the active link.
282 void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy,
283 struct isci_port *isci_port)
285 struct isci_remote_device *isci_device;
287 dev_dbg(&isci_host->pdev->dev,
288 "%s: isci_port = %p\n", __func__, isci_port);
292 /* check to see if this is the last phy on this port. */
293 if (isci_phy->sas_phy.port
294 && isci_phy->sas_phy.port->num_phys == 1) {
296 /* change the state for all devices on this port.
297 * The next task sent to this device will be returned
298 * as SAS_TASK_UNDELIVERED, and the scsi mid layer
299 * will remove the target
301 list_for_each_entry(isci_device,
302 &isci_port->remote_dev_list,
304 dev_dbg(&isci_host->pdev->dev,
305 "%s: isci_device = %p\n",
306 __func__, isci_device);
307 isci_remote_device_change_state(isci_device,
311 isci_port_change_state(isci_port, isci_stopping);
314 /* Notify libsas of the borken link, this will trigger calls to our
315 * isci_port_deformed and isci_dev_gone functions.
317 sas_phy_disconnected(&isci_phy->sas_phy);
318 isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy,
319 PHYE_LOSS_OF_SIGNAL);
321 isci_phy->isci_port = NULL;
323 dev_dbg(&isci_host->pdev->dev,
324 "%s: isci_port = %p - Done\n", __func__, isci_port);
329 * isci_port_deformed() - This function is called by libsas when a port becomes
331 * @phy: This parameter specifies the libsas phy with the inactive port.
334 void isci_port_deformed(
335 struct asd_sas_phy *phy)
337 pr_debug("%s: sas_phy = %p\n", __func__, phy);
341 * isci_port_formed() - This function is called by libsas when a port becomes
343 * @phy: This parameter specifies the libsas phy with the active port.
346 void isci_port_formed(
347 struct asd_sas_phy *phy)
349 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
353 * isci_port_ready() - This function is called by the sci core when a link
355 * @isci_host: This parameter specifies the isci host object.
356 * @port: This parameter specifies the sci port with the active link.
359 void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
361 dev_dbg(&isci_host->pdev->dev,
362 "%s: isci_port = %p\n", __func__, isci_port);
364 complete_all(&isci_port->start_complete);
365 isci_port_change_state(isci_port, isci_ready);
370 * isci_port_not_ready() - This function is called by the sci core when a link
371 * is not ready. All remote devices on this link will be removed if they are
372 * in the stopping state.
373 * @isci_host: This parameter specifies the isci host object.
374 * @port: This parameter specifies the sci port with the active link.
377 void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
379 dev_dbg(&isci_host->pdev->dev,
380 "%s: isci_port = %p\n", __func__, isci_port);
384 * isci_port_hard_reset_complete() - This function is called by the sci core
385 * when the hard reset complete notification has been received.
386 * @port: This parameter specifies the sci port with the active link.
387 * @completion_status: This parameter specifies the core status for the reset
391 void isci_port_hard_reset_complete(struct isci_port *isci_port,
392 enum sci_status completion_status)
394 dev_dbg(&isci_port->isci_host->pdev->dev,
395 "%s: isci_port = %p, completion_status=%x\n",
396 __func__, isci_port, completion_status);
398 /* Save the status of the hard reset from the port. */
399 isci_port->hard_reset_status = completion_status;
401 complete_all(&isci_port->hard_reset_complete);
404 * isci_port_perform_hard_reset() - This function is one of the SAS Domain
405 * Template functions. This is a phy management function.
409 * status, TMF_RESP_FUNC_COMPLETE indicates success.
411 int isci_port_perform_hard_reset(
412 struct isci_port *isci_port,
413 struct isci_phy *isci_phy)
415 enum sci_status status;
416 int ret = TMF_RESP_FUNC_COMPLETE;
420 dev_dbg(&isci_port->isci_host->pdev->dev,
421 "%s: isci_port = %p\n",
422 __func__, isci_port);
424 BUG_ON(isci_port == NULL);
426 init_completion(&isci_port->hard_reset_complete);
428 spin_lock_irqsave(&isci_port->isci_host->scic_lock, flags);
430 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
431 status = scic_port_hard_reset(isci_port->sci_port_handle,
432 ISCI_PORT_RESET_TIMEOUT);
434 spin_unlock_irqrestore(&isci_port->isci_host->scic_lock, flags);
436 if (status == SCI_SUCCESS) {
437 wait_for_completion(&isci_port->hard_reset_complete);
439 dev_dbg(&isci_port->isci_host->pdev->dev,
440 "%s: isci_port = %p; hard reset completion\n",
441 __func__, isci_port);
443 if (isci_port->hard_reset_status != SCI_SUCCESS)
444 ret = TMF_RESP_FUNC_FAILED;
446 ret = TMF_RESP_FUNC_FAILED;
448 dev_err(&isci_port->isci_host->pdev->dev,
449 "%s: isci_port = %p; scic_port_hard_reset call"
451 __func__, isci_port, status);
455 /* If the hard reset for the port has failed, consider this
456 * the same as link failures on all phys in the port.
458 if (ret != TMF_RESP_FUNC_COMPLETE) {
459 BUG_ON(isci_port->isci_host == NULL);
461 dev_err(&isci_port->isci_host->pdev->dev,
462 "%s: isci_port = %p; hard reset failed "
463 "(0x%x) - sending link down to libsas for phy %p\n",
466 isci_port->hard_reset_status,
469 isci_port_link_down(isci_port->isci_host,
478 * isci_port_invalid_link_up() - This function informs the SCI Core user that
479 * a phy/link became ready, but the phy is not allowed in the port. In some
480 * situations the underlying hardware only allows for certain phy to port
481 * mappings. If these mappings are violated, then this API is invoked.
482 * @controller: This parameter represents the controller which contains the
484 * @port: This parameter specifies the SCI port object for which the callback
486 * @phy: This parameter specifies the phy that came ready, but the phy can't be
487 * a valid member of the port.
490 void isci_port_invalid_link_up(struct scic_sds_controller *scic,
491 struct scic_sds_port *sci_port,
492 struct scic_sds_phy *phy)
494 struct isci_host *ihost =
495 (struct isci_host *)sci_object_get_association(scic);
497 dev_warn(&ihost->pdev->dev, "Invalid link up!\n");
500 void isci_port_stop_complete(struct scic_sds_controller *scic,
501 struct scic_sds_port *sci_port,
502 enum sci_status completion_status)
504 struct isci_host *ihost = sci_object_get_association(scic);
506 dev_dbg(&ihost->pdev->dev, "Port stop complete\n");