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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 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 = 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_port *isci_port
173 = (struct isci_port *)sci_object_get_association(port);
174 struct isci_phy *isci_phy = phy->iphy;
175 enum sci_status call_status;
176 unsigned long success = true;
178 BUG_ON(isci_phy->isci_port != NULL);
180 isci_phy->isci_port = isci_port;
182 dev_dbg(&isci_host->pdev->dev,
183 "%s: isci_port = %p\n",
184 __func__, isci_port);
186 spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags);
188 isci_port_change_state(isci_phy->isci_port, isci_starting);
190 scic_port_get_properties(port, &properties);
192 if (properties.remote.protocols.u.bits.stp_target) {
193 u64 attached_sas_address;
195 struct scic_sata_phy_properties sata_phy_properties;
197 isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
199 /* Get a copy of the signature fis for libsas */
200 call_status = scic_sata_phy_get_properties(phy,
201 &sata_phy_properties);
204 * XXX I am concerned about this "assert". shouldn't we
205 * handle the return appropriately?
207 BUG_ON(call_status != SCI_SUCCESS);
209 memcpy(isci_phy->frame_rcvd.fis,
210 &sata_phy_properties.signature_fis,
211 sizeof(struct sata_fis_reg_d2h));
213 isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sata_fis_reg_d2h);
216 * For direct-attached SATA devices, the SCI core will
217 * automagically assign a SAS address to the end device
218 * for the purpose of creating a port. This SAS address
219 * will not be the same as assigned to the PHY and needs
220 * to be obtained from struct scic_port_properties properties.
222 attached_sas_address = properties.remote.sas_address.high;
223 attached_sas_address <<= 32;
224 attached_sas_address |= properties.remote.sas_address.low;
225 swab64s(&attached_sas_address);
227 memcpy(&isci_phy->sas_phy.attached_sas_addr,
228 &attached_sas_address, sizeof(attached_sas_address));
230 } else if (properties.remote.protocols.u.bits.ssp_target ||
231 properties.remote.protocols.u.bits.smp_target) {
233 struct scic_sas_phy_properties sas_phy_properties;
235 isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
237 /* Get a copy of the identify address frame for libsas */
238 call_status = scic_sas_phy_get_properties(phy,
239 &sas_phy_properties);
241 BUG_ON(call_status != SCI_SUCCESS);
243 memcpy(isci_phy->frame_rcvd.aif,
244 &(sas_phy_properties.received_iaf),
245 sizeof(struct sci_sas_identify_address_frame));
247 isci_phy->sas_phy.frame_rcvd_size
248 = sizeof(struct sci_sas_identify_address_frame);
250 /* Copy the attached SAS address from the IAF */
251 memcpy(isci_phy->sas_phy.attached_sas_addr,
252 ((struct sas_identify_frame *)
253 (&isci_phy->frame_rcvd.aif))->sas_addr,
257 dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
261 isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
263 spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags);
265 /* Notify libsas that we have an address frame, if indeed
266 * we've found an SSP, SMP, or STP target */
268 isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy,
274 * isci_port_link_down() - This function is called by the sci core when a link
276 * @isci_host: This parameter specifies the isci host object.
277 * @phy: This parameter specifies the isci phy with the active link.
278 * @port: This parameter specifies the isci port with the active link.
281 void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy,
282 struct isci_port *isci_port)
284 struct isci_remote_device *isci_device;
286 dev_dbg(&isci_host->pdev->dev,
287 "%s: isci_port = %p\n", __func__, isci_port);
291 /* check to see if this is the last phy on this port. */
292 if (isci_phy->sas_phy.port
293 && isci_phy->sas_phy.port->num_phys == 1) {
295 /* change the state for all devices on this port.
296 * The next task sent to this device will be returned
297 * as SAS_TASK_UNDELIVERED, and the scsi mid layer
298 * will remove the target
300 list_for_each_entry(isci_device,
301 &isci_port->remote_dev_list,
303 dev_dbg(&isci_host->pdev->dev,
304 "%s: isci_device = %p\n",
305 __func__, isci_device);
306 isci_remote_device_change_state(isci_device,
310 isci_port_change_state(isci_port, isci_stopping);
313 /* Notify libsas of the borken link, this will trigger calls to our
314 * isci_port_deformed and isci_dev_gone functions.
316 sas_phy_disconnected(&isci_phy->sas_phy);
317 isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy,
318 PHYE_LOSS_OF_SIGNAL);
320 isci_phy->isci_port = NULL;
322 dev_dbg(&isci_host->pdev->dev,
323 "%s: isci_port = %p - Done\n", __func__, isci_port);
328 * isci_port_deformed() - This function is called by libsas when a port becomes
330 * @phy: This parameter specifies the libsas phy with the inactive port.
333 void isci_port_deformed(
334 struct asd_sas_phy *phy)
336 pr_debug("%s: sas_phy = %p\n", __func__, phy);
340 * isci_port_formed() - This function is called by libsas when a port becomes
342 * @phy: This parameter specifies the libsas phy with the active port.
345 void isci_port_formed(
346 struct asd_sas_phy *phy)
348 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
352 * isci_port_ready() - This function is called by the sci core when a link
354 * @isci_host: This parameter specifies the isci host object.
355 * @port: This parameter specifies the sci port with the active link.
358 void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
360 dev_dbg(&isci_host->pdev->dev,
361 "%s: isci_port = %p\n", __func__, isci_port);
363 complete_all(&isci_port->start_complete);
364 isci_port_change_state(isci_port, isci_ready);
369 * isci_port_not_ready() - This function is called by the sci core when a link
370 * is not ready. All remote devices on this link will be removed if they are
371 * in the stopping state.
372 * @isci_host: This parameter specifies the isci host object.
373 * @port: This parameter specifies the sci port with the active link.
376 void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
378 dev_dbg(&isci_host->pdev->dev,
379 "%s: isci_port = %p\n", __func__, isci_port);
383 * isci_port_hard_reset_complete() - This function is called by the sci core
384 * when the hard reset complete notification has been received.
385 * @port: This parameter specifies the sci port with the active link.
386 * @completion_status: This parameter specifies the core status for the reset
390 void isci_port_hard_reset_complete(struct isci_port *isci_port,
391 enum sci_status completion_status)
393 dev_dbg(&isci_port->isci_host->pdev->dev,
394 "%s: isci_port = %p, completion_status=%x\n",
395 __func__, isci_port, completion_status);
397 /* Save the status of the hard reset from the port. */
398 isci_port->hard_reset_status = completion_status;
400 complete_all(&isci_port->hard_reset_complete);
403 int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
404 struct isci_phy *iphy)
407 enum sci_status status;
408 int ret = TMF_RESP_FUNC_COMPLETE;
410 dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
413 init_completion(&iport->hard_reset_complete);
415 spin_lock_irqsave(&ihost->scic_lock, flags);
417 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
418 status = scic_port_hard_reset(iport->sci_port_handle,
419 ISCI_PORT_RESET_TIMEOUT);
421 spin_unlock_irqrestore(&ihost->scic_lock, flags);
423 if (status == SCI_SUCCESS) {
424 wait_for_completion(&iport->hard_reset_complete);
426 dev_dbg(&ihost->pdev->dev,
427 "%s: iport = %p; hard reset completion\n",
430 if (iport->hard_reset_status != SCI_SUCCESS)
431 ret = TMF_RESP_FUNC_FAILED;
433 ret = TMF_RESP_FUNC_FAILED;
435 dev_err(&ihost->pdev->dev,
436 "%s: iport = %p; scic_port_hard_reset call"
438 __func__, iport, status);
442 /* If the hard reset for the port has failed, consider this
443 * the same as link failures on all phys in the port.
445 if (ret != TMF_RESP_FUNC_COMPLETE) {
446 dev_err(&ihost->pdev->dev,
447 "%s: iport = %p; hard reset failed "
448 "(0x%x) - sending link down to libsas for phy %p\n",
449 __func__, iport, iport->hard_reset_status, iphy);
451 isci_port_link_down(ihost, iphy, iport);
458 * isci_port_invalid_link_up() - This function informs the SCI Core user that
459 * a phy/link became ready, but the phy is not allowed in the port. In some
460 * situations the underlying hardware only allows for certain phy to port
461 * mappings. If these mappings are violated, then this API is invoked.
462 * @controller: This parameter represents the controller which contains the
464 * @port: This parameter specifies the SCI port object for which the callback
466 * @phy: This parameter specifies the phy that came ready, but the phy can't be
467 * a valid member of the port.
470 void isci_port_invalid_link_up(struct scic_sds_controller *scic,
471 struct scic_sds_port *sci_port,
472 struct scic_sds_phy *phy)
474 struct isci_host *ihost = scic->ihost;
476 dev_warn(&ihost->pdev->dev, "Invalid link up!\n");
479 void isci_port_stop_complete(struct scic_sds_controller *scic,
480 struct scic_sds_port *sci_port,
481 enum sci_status completion_status)
483 struct isci_host *ihost = scic->ihost;
485 dev_dbg(&ihost->pdev->dev, "Port stop complete\n");