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57 * This file contains the isci port implementation.
63 #include <linux/workqueue.h>
65 #include "scic_io_request.h"
67 #include "scic_sds_phy.h"
68 #include "scic_port.h"
71 #include "core/scic_sds_controller.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 isci_port->sci_port_handle = scic_port;
104 scic_port->iport = isci_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 = phy->iphy;
142 dev_dbg(&isci_host->pdev->dev,
143 "%s: isci_phy = %p, sas_phy = %p\n",
148 isci_host->sas_ha.notify_port_event(
153 scic_port_enable_broadcast_change_notification(port);
157 * isci_port_link_up() - This function is called by the sci core when a link
158 * becomes active. the identify address frame is retrieved from the core and
159 * a notify port event is sent to libsas.
160 * @isci_host: This parameter specifies the isci host object.
161 * @port: This parameter specifies the sci port with the active link.
162 * @phy: This parameter specifies the sci phy with the active link.
165 void isci_port_link_up(
166 struct isci_host *isci_host,
167 struct scic_sds_port *port,
168 struct scic_sds_phy *phy)
171 struct scic_port_properties properties;
172 struct isci_phy *isci_phy = phy->iphy;
173 struct isci_port *isci_port = port->iport;
174 enum sci_status call_status;
175 unsigned long success = true;
177 BUG_ON(isci_phy->isci_port != NULL);
179 isci_phy->isci_port = isci_port;
181 dev_dbg(&isci_host->pdev->dev,
182 "%s: isci_port = %p\n",
183 __func__, isci_port);
185 spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags);
187 isci_port_change_state(isci_phy->isci_port, isci_starting);
189 scic_port_get_properties(port, &properties);
191 if (properties.remote.protocols.u.bits.stp_target) {
192 u64 attached_sas_address;
194 struct scic_sata_phy_properties sata_phy_properties;
196 isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
198 /* Get a copy of the signature fis for libsas */
199 call_status = scic_sata_phy_get_properties(phy,
200 &sata_phy_properties);
203 * XXX I am concerned about this "assert". shouldn't we
204 * handle the return appropriately?
206 BUG_ON(call_status != SCI_SUCCESS);
208 memcpy(isci_phy->frame_rcvd.fis,
209 &sata_phy_properties.signature_fis,
210 sizeof(struct sata_fis_reg_d2h));
212 isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sata_fis_reg_d2h);
215 * For direct-attached SATA devices, the SCI core will
216 * automagically assign a SAS address to the end device
217 * for the purpose of creating a port. This SAS address
218 * will not be the same as assigned to the PHY and needs
219 * to be obtained from struct scic_port_properties properties.
221 attached_sas_address = properties.remote.sas_address.high;
222 attached_sas_address <<= 32;
223 attached_sas_address |= properties.remote.sas_address.low;
224 swab64s(&attached_sas_address);
226 memcpy(&isci_phy->sas_phy.attached_sas_addr,
227 &attached_sas_address, sizeof(attached_sas_address));
229 } else if (properties.remote.protocols.u.bits.ssp_target ||
230 properties.remote.protocols.u.bits.smp_target) {
232 struct scic_sas_phy_properties sas_phy_properties;
234 isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
236 /* Get a copy of the identify address frame for libsas */
237 call_status = scic_sas_phy_get_properties(phy,
238 &sas_phy_properties);
240 BUG_ON(call_status != SCI_SUCCESS);
242 memcpy(isci_phy->frame_rcvd.aif,
243 &(sas_phy_properties.received_iaf),
244 sizeof(struct sci_sas_identify_address_frame));
246 isci_phy->sas_phy.frame_rcvd_size
247 = sizeof(struct sci_sas_identify_address_frame);
249 /* Copy the attached SAS address from the IAF */
250 memcpy(isci_phy->sas_phy.attached_sas_addr,
251 ((struct sas_identify_frame *)
252 (&isci_phy->frame_rcvd.aif))->sas_addr,
256 dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
260 isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
262 spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags);
264 /* Notify libsas that we have an address frame, if indeed
265 * we've found an SSP, SMP, or STP target */
267 isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy,
273 * isci_port_link_down() - This function is called by the sci core when a link
275 * @isci_host: This parameter specifies the isci host object.
276 * @phy: This parameter specifies the isci phy with the active link.
277 * @port: This parameter specifies the isci port with the active link.
280 void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy,
281 struct isci_port *isci_port)
283 struct isci_remote_device *isci_device;
285 dev_dbg(&isci_host->pdev->dev,
286 "%s: isci_port = %p\n", __func__, isci_port);
290 /* check to see if this is the last phy on this port. */
291 if (isci_phy->sas_phy.port
292 && isci_phy->sas_phy.port->num_phys == 1) {
294 /* change the state for all devices on this port.
295 * The next task sent to this device will be returned
296 * as SAS_TASK_UNDELIVERED, and the scsi mid layer
297 * will remove the target
299 list_for_each_entry(isci_device,
300 &isci_port->remote_dev_list,
302 dev_dbg(&isci_host->pdev->dev,
303 "%s: isci_device = %p\n",
304 __func__, isci_device);
305 isci_remote_device_change_state(isci_device,
309 isci_port_change_state(isci_port, isci_stopping);
312 /* Notify libsas of the borken link, this will trigger calls to our
313 * isci_port_deformed and isci_dev_gone functions.
315 sas_phy_disconnected(&isci_phy->sas_phy);
316 isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy,
317 PHYE_LOSS_OF_SIGNAL);
319 isci_phy->isci_port = NULL;
321 dev_dbg(&isci_host->pdev->dev,
322 "%s: isci_port = %p - Done\n", __func__, isci_port);
327 * isci_port_deformed() - This function is called by libsas when a port becomes
329 * @phy: This parameter specifies the libsas phy with the inactive port.
332 void isci_port_deformed(
333 struct asd_sas_phy *phy)
335 pr_debug("%s: sas_phy = %p\n", __func__, phy);
339 * isci_port_formed() - This function is called by libsas when a port becomes
341 * @phy: This parameter specifies the libsas phy with the active port.
344 void isci_port_formed(
345 struct asd_sas_phy *phy)
347 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
351 * isci_port_ready() - This function is called by the sci core when a link
353 * @isci_host: This parameter specifies the isci host object.
354 * @port: This parameter specifies the sci port with the active link.
357 void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
359 dev_dbg(&isci_host->pdev->dev,
360 "%s: isci_port = %p\n", __func__, isci_port);
362 complete_all(&isci_port->start_complete);
363 isci_port_change_state(isci_port, isci_ready);
368 * isci_port_not_ready() - This function is called by the sci core when a link
369 * is not ready. All remote devices on this link will be removed if they are
370 * in the stopping state.
371 * @isci_host: This parameter specifies the isci host object.
372 * @port: This parameter specifies the sci port with the active link.
375 void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
377 dev_dbg(&isci_host->pdev->dev,
378 "%s: isci_port = %p\n", __func__, isci_port);
382 * isci_port_hard_reset_complete() - This function is called by the sci core
383 * when the hard reset complete notification has been received.
384 * @port: This parameter specifies the sci port with the active link.
385 * @completion_status: This parameter specifies the core status for the reset
389 void isci_port_hard_reset_complete(struct isci_port *isci_port,
390 enum sci_status completion_status)
392 dev_dbg(&isci_port->isci_host->pdev->dev,
393 "%s: isci_port = %p, completion_status=%x\n",
394 __func__, isci_port, completion_status);
396 /* Save the status of the hard reset from the port. */
397 isci_port->hard_reset_status = completion_status;
399 complete_all(&isci_port->hard_reset_complete);
402 int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
403 struct isci_phy *iphy)
406 enum sci_status status;
407 int ret = TMF_RESP_FUNC_COMPLETE;
409 dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
412 init_completion(&iport->hard_reset_complete);
414 spin_lock_irqsave(&ihost->scic_lock, flags);
416 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
417 status = scic_port_hard_reset(iport->sci_port_handle,
418 ISCI_PORT_RESET_TIMEOUT);
420 spin_unlock_irqrestore(&ihost->scic_lock, flags);
422 if (status == SCI_SUCCESS) {
423 wait_for_completion(&iport->hard_reset_complete);
425 dev_dbg(&ihost->pdev->dev,
426 "%s: iport = %p; hard reset completion\n",
429 if (iport->hard_reset_status != SCI_SUCCESS)
430 ret = TMF_RESP_FUNC_FAILED;
432 ret = TMF_RESP_FUNC_FAILED;
434 dev_err(&ihost->pdev->dev,
435 "%s: iport = %p; scic_port_hard_reset call"
437 __func__, iport, status);
441 /* If the hard reset for the port has failed, consider this
442 * the same as link failures on all phys in the port.
444 if (ret != TMF_RESP_FUNC_COMPLETE) {
445 dev_err(&ihost->pdev->dev,
446 "%s: iport = %p; hard reset failed "
447 "(0x%x) - sending link down to libsas for phy %p\n",
448 __func__, iport, iport->hard_reset_status, iphy);
450 isci_port_link_down(ihost, iphy, iport);
457 * isci_port_invalid_link_up() - This function informs the SCI Core user that
458 * a phy/link became ready, but the phy is not allowed in the port. In some
459 * situations the underlying hardware only allows for certain phy to port
460 * mappings. If these mappings are violated, then this API is invoked.
461 * @controller: This parameter represents the controller which contains the
463 * @port: This parameter specifies the SCI port object for which the callback
465 * @phy: This parameter specifies the phy that came ready, but the phy can't be
466 * a valid member of the port.
469 void isci_port_invalid_link_up(struct scic_sds_controller *scic,
470 struct scic_sds_port *sci_port,
471 struct scic_sds_phy *phy)
473 struct isci_host *ihost = scic->ihost;
475 dev_warn(&ihost->pdev->dev, "Invalid link up!\n");
478 void isci_port_stop_complete(struct scic_sds_controller *scic,
479 struct scic_sds_port *sci_port,
480 enum sci_status completion_status)
482 struct isci_host *ihost = scic->ihost;
484 dev_dbg(&ihost->pdev->dev, "Port stop complete\n");