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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->remote_device_lock);
98 spin_lock_init(&isci_port->state_lock);
99 init_completion(&isci_port->start_complete);
100 isci_port->isci_host = isci_host;
101 isci_port_change_state(isci_port, isci_freed);
103 (void)scic_controller_get_port_handle(controller, index, &scic_port);
104 sci_object_set_association(scic_port, isci_port);
105 isci_port->sci_port_handle = scic_port;
110 * isci_port_get_state() - This function gets the status of the port object.
111 * @isci_port: This parameter points to the isci_port object
113 * status of the object as a isci_status enum.
115 enum isci_status isci_port_get_state(
116 struct isci_port *isci_port)
118 return isci_port->status;
121 static void isci_port_change_state(
122 struct isci_port *isci_port,
123 enum isci_status status)
127 dev_dbg(&isci_port->isci_host->pdev->dev,
128 "%s: isci_port = %p, state = 0x%x\n",
129 __func__, isci_port, status);
131 spin_lock_irqsave(&isci_port->state_lock, flags);
132 isci_port->status = status;
133 spin_unlock_irqrestore(&isci_port->state_lock, flags);
136 void isci_port_bc_change_received(
137 struct isci_host *isci_host,
138 struct scic_sds_port *port,
139 struct scic_sds_phy *phy)
141 struct isci_phy *isci_phy =
142 (struct isci_phy *)sci_object_get_association(phy);
144 dev_dbg(&isci_host->pdev->dev,
145 "%s: isci_phy = %p, sas_phy = %p\n",
150 isci_host->sas_ha.notify_port_event(
155 scic_port_enable_broadcast_change_notification(port);
159 * isci_port_link_up() - This function is called by the sci core when a link
160 * becomes active. the identify address frame is retrieved from the core and
161 * a notify port event is sent to libsas.
162 * @isci_host: This parameter specifies the isci host object.
163 * @port: This parameter specifies the sci port with the active link.
164 * @phy: This parameter specifies the sci phy with the active link.
167 void isci_port_link_up(
168 struct isci_host *isci_host,
169 struct scic_sds_port *port,
170 struct scic_sds_phy *phy)
173 struct scic_port_properties properties;
174 struct isci_phy *isci_phy
175 = (struct isci_phy *)sci_object_get_association(phy);
176 struct isci_port *isci_port
177 = (struct isci_port *)sci_object_get_association(port);
178 enum sci_status call_status;
179 unsigned long success = true;
181 BUG_ON(isci_phy->isci_port != NULL);
182 isci_phy->isci_port = isci_port;
184 dev_dbg(&isci_host->pdev->dev,
185 "%s: isci_port = %p\n",
186 __func__, isci_port);
188 spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags);
190 isci_port_change_state(isci_phy->isci_port, isci_starting);
192 scic_port_get_properties(port, &properties);
194 if (properties.remote.protocols.u.bits.stp_target) {
195 u64 attached_sas_address;
197 struct scic_sata_phy_properties sata_phy_properties;
199 isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
201 /* Get a copy of the signature fis for libsas */
202 call_status = scic_sata_phy_get_properties(phy,
203 &sata_phy_properties);
206 * XXX I am concerned about this "assert". shouldn't we
207 * handle the return appropriately?
209 BUG_ON(call_status != SCI_SUCCESS);
211 memcpy(isci_phy->frame_rcvd.fis,
212 &sata_phy_properties.signature_fis,
213 sizeof(struct sata_fis_reg_d2h));
215 isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sata_fis_reg_d2h);
218 * For direct-attached SATA devices, the SCI core will
219 * automagically assign a SAS address to the end device
220 * for the purpose of creating a port. This SAS address
221 * will not be the same as assigned to the PHY and needs
222 * to be obtained from struct scic_port_properties properties.
224 attached_sas_address = properties.remote.sas_address.high;
225 attached_sas_address <<= 32;
226 attached_sas_address |= properties.remote.sas_address.low;
227 swab64s(&attached_sas_address);
229 memcpy(&isci_phy->sas_phy.attached_sas_addr,
230 &attached_sas_address, sizeof(attached_sas_address));
232 } else if (properties.remote.protocols.u.bits.ssp_target ||
233 properties.remote.protocols.u.bits.smp_target) {
235 struct scic_sas_phy_properties sas_phy_properties;
237 isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
239 /* Get a copy of the identify address frame for libsas */
240 call_status = scic_sas_phy_get_properties(phy,
241 &sas_phy_properties);
243 BUG_ON(call_status != SCI_SUCCESS);
245 memcpy(isci_phy->frame_rcvd.aif,
246 &(sas_phy_properties.received_iaf),
247 sizeof(struct sci_sas_identify_address_frame));
249 isci_phy->sas_phy.frame_rcvd_size
250 = sizeof(struct sci_sas_identify_address_frame);
252 /* Copy the attached SAS address from the IAF */
253 memcpy(isci_phy->sas_phy.attached_sas_addr,
254 ((struct sas_identify_frame *)
255 (&isci_phy->frame_rcvd.aif))->sas_addr,
259 dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
263 isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
265 spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags);
267 /* Notify libsas that we have an address frame, if indeed
268 * we've found an SSP, SMP, or STP target */
270 isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy,
276 * isci_port_link_down() - This function is called by the sci core when a link
278 * @isci_host: This parameter specifies the isci host object.
279 * @phy: This parameter specifies the isci phy with the active link.
280 * @port: This parameter specifies the isci port with the active link.
283 void isci_port_link_down(
284 struct isci_host *isci_host,
285 struct isci_phy *isci_phy,
286 struct isci_port *isci_port)
288 struct isci_remote_device *isci_device;
290 dev_dbg(&isci_host->pdev->dev,
291 "%s: isci_port = %p\n", __func__, isci_port);
295 /* check to see if this is the last phy on this port. */
296 if (isci_phy->sas_phy.port
297 && isci_phy->sas_phy.port->num_phys == 1) {
299 /* change the state for all devices on this port.
300 * The next task sent to this device will be returned
301 * as SAS_TASK_UNDELIVERED, and the scsi mid layer
302 * will remove the target
304 list_for_each_entry(isci_device,
305 &isci_port->remote_dev_list,
307 dev_dbg(&isci_host->pdev->dev,
308 "%s: isci_device = %p\n",
309 __func__, isci_device);
310 isci_remote_device_change_state(isci_device,
314 isci_port_change_state(isci_port, isci_stopping);
317 /* Notify libsas of the borken link, this will trigger calls to our
318 * isci_port_deformed and isci_dev_gone functions.
320 sas_phy_disconnected(&isci_phy->sas_phy);
321 isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy,
322 PHYE_LOSS_OF_SIGNAL);
324 isci_phy->isci_port = NULL;
326 dev_dbg(&isci_host->pdev->dev,
327 "%s: isci_port = %p - Done\n", __func__, isci_port);
332 * isci_port_deformed() - This function is called by libsas when a port becomes
334 * @phy: This parameter specifies the libsas phy with the inactive port.
337 void isci_port_deformed(
338 struct asd_sas_phy *phy)
340 pr_debug("%s: sas_phy = %p\n", __func__, phy);
344 * isci_port_formed() - This function is called by libsas when a port becomes
346 * @phy: This parameter specifies the libsas phy with the active port.
349 void isci_port_formed(
350 struct asd_sas_phy *phy)
352 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
356 * isci_port_ready() - This function is called by the sci core when a link
358 * @isci_host: This parameter specifies the isci host object.
359 * @port: This parameter specifies the sci port with the active link.
362 void isci_port_ready(
363 struct isci_host *isci_host,
364 struct isci_port *isci_port)
366 dev_dbg(&isci_host->pdev->dev,
367 "%s: isci_port = %p\n", __func__, isci_port);
369 complete_all(&isci_port->start_complete);
370 isci_port_change_state(isci_port, isci_ready);
375 * isci_port_not_ready() - This function is called by the sci core when a link
376 * is not ready. All remote devices on this link will be removed if they are
377 * in the stopping state.
378 * @isci_host: This parameter specifies the isci host object.
379 * @port: This parameter specifies the sci port with the active link.
382 void isci_port_not_ready(
383 struct isci_host *isci_host,
384 struct isci_port *isci_port)
386 dev_dbg(&isci_host->pdev->dev,
387 "%s: isci_port = %p\n", __func__, isci_port);
391 * isci_port_hard_reset_complete() - This function is called by the sci core
392 * when the hard reset complete notification has been received.
393 * @port: This parameter specifies the sci port with the active link.
394 * @completion_status: This parameter specifies the core status for the reset
398 void isci_port_hard_reset_complete(
399 struct isci_port *isci_port,
400 enum sci_status completion_status)
402 dev_dbg(&isci_port->isci_host->pdev->dev,
403 "%s: isci_port = %p, completion_status=%x\n",
404 __func__, isci_port, completion_status);
406 /* Save the status of the hard reset from the port. */
407 isci_port->hard_reset_status = completion_status;
409 complete_all(&isci_port->hard_reset_complete);
412 * isci_port_perform_hard_reset() - This function is one of the SAS Domain
413 * Template functions. This is a phy management function.
417 * status, TMF_RESP_FUNC_COMPLETE indicates success.
419 int isci_port_perform_hard_reset(
420 struct isci_port *isci_port,
421 struct isci_phy *isci_phy)
423 enum sci_status status;
424 int ret = TMF_RESP_FUNC_COMPLETE;
428 dev_dbg(&isci_port->isci_host->pdev->dev,
429 "%s: isci_port = %p\n",
430 __func__, isci_port);
432 BUG_ON(isci_port == NULL);
434 init_completion(&isci_port->hard_reset_complete);
436 spin_lock_irqsave(&isci_port->isci_host->scic_lock, flags);
438 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
439 status = scic_port_hard_reset(isci_port->sci_port_handle,
440 ISCI_PORT_RESET_TIMEOUT);
442 spin_unlock_irqrestore(&isci_port->isci_host->scic_lock, flags);
444 if (status == SCI_SUCCESS) {
445 wait_for_completion(&isci_port->hard_reset_complete);
447 dev_dbg(&isci_port->isci_host->pdev->dev,
448 "%s: isci_port = %p; hard reset completion\n",
449 __func__, isci_port);
451 if (isci_port->hard_reset_status != SCI_SUCCESS)
452 ret = TMF_RESP_FUNC_FAILED;
454 ret = TMF_RESP_FUNC_FAILED;
456 dev_err(&isci_port->isci_host->pdev->dev,
457 "%s: isci_port = %p; scic_port_hard_reset call"
459 __func__, isci_port, status);
463 /* If the hard reset for the port has failed, consider this
464 * the same as link failures on all phys in the port.
466 if (ret != TMF_RESP_FUNC_COMPLETE) {
467 BUG_ON(isci_port->isci_host == NULL);
469 dev_err(&isci_port->isci_host->pdev->dev,
470 "%s: isci_port = %p; hard reset failed "
471 "(0x%x) - sending link down to libsas for phy %p\n",
474 isci_port->hard_reset_status,
477 isci_port_link_down(isci_port->isci_host,