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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;
94 INIT_LIST_HEAD(&isci_port->remote_dev_list);
95 INIT_LIST_HEAD(&isci_port->domain_dev_list);
96 spin_lock_init(&isci_port->state_lock);
97 init_completion(&isci_port->start_complete);
98 isci_port->isci_host = isci_host;
99 isci_port_change_state(isci_port, isci_freed);
101 (void)scic_controller_get_port_handle(&isci_host->sci, index, &scic_port);
102 isci_port->sci_port_handle = scic_port;
103 scic_port->iport = isci_port;
108 * isci_port_get_state() - This function gets the status of the port object.
109 * @isci_port: This parameter points to the isci_port object
111 * status of the object as a isci_status enum.
113 enum isci_status isci_port_get_state(
114 struct isci_port *isci_port)
116 return isci_port->status;
119 static void isci_port_change_state(
120 struct isci_port *isci_port,
121 enum isci_status status)
125 dev_dbg(&isci_port->isci_host->pdev->dev,
126 "%s: isci_port = %p, state = 0x%x\n",
127 __func__, isci_port, status);
129 spin_lock_irqsave(&isci_port->state_lock, flags);
130 isci_port->status = status;
131 spin_unlock_irqrestore(&isci_port->state_lock, flags);
134 void isci_port_bc_change_received(
135 struct isci_host *isci_host,
136 struct scic_sds_port *port,
137 struct scic_sds_phy *phy)
139 struct isci_phy *isci_phy = phy->iphy;
141 dev_dbg(&isci_host->pdev->dev,
142 "%s: isci_phy = %p, sas_phy = %p\n",
147 isci_host->sas_ha.notify_port_event(
152 scic_port_enable_broadcast_change_notification(port);
156 * isci_port_link_up() - This function is called by the sci core when a link
157 * becomes active. the identify address frame is retrieved from the core and
158 * a notify port event is sent to libsas.
159 * @isci_host: This parameter specifies the isci host object.
160 * @port: This parameter specifies the sci port with the active link.
161 * @phy: This parameter specifies the sci phy with the active link.
164 void isci_port_link_up(
165 struct isci_host *isci_host,
166 struct scic_sds_port *port,
167 struct scic_sds_phy *phy)
170 struct scic_port_properties properties;
171 struct isci_phy *isci_phy = phy->iphy;
172 struct isci_port *isci_port = port->iport;
173 unsigned long success = true;
175 BUG_ON(isci_phy->isci_port != NULL);
177 isci_phy->isci_port = isci_port;
179 dev_dbg(&isci_host->pdev->dev,
180 "%s: isci_port = %p\n",
181 __func__, isci_port);
183 spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags);
185 isci_port_change_state(isci_phy->isci_port, isci_starting);
187 scic_port_get_properties(port, &properties);
189 if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) {
190 u64 attached_sas_address;
192 isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
193 isci_phy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis);
196 * For direct-attached SATA devices, the SCI core will
197 * automagically assign a SAS address to the end device
198 * for the purpose of creating a port. This SAS address
199 * will not be the same as assigned to the PHY and needs
200 * to be obtained from struct scic_port_properties properties.
202 attached_sas_address = properties.remote.sas_address.high;
203 attached_sas_address <<= 32;
204 attached_sas_address |= properties.remote.sas_address.low;
205 swab64s(&attached_sas_address);
207 memcpy(&isci_phy->sas_phy.attached_sas_addr,
208 &attached_sas_address, sizeof(attached_sas_address));
209 } else if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) {
210 isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
211 isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame);
213 /* Copy the attached SAS address from the IAF */
214 memcpy(isci_phy->sas_phy.attached_sas_addr,
215 isci_phy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE);
217 dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
221 isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
223 spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags);
225 /* Notify libsas that we have an address frame, if indeed
226 * we've found an SSP, SMP, or STP target */
228 isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy,
234 * isci_port_link_down() - This function is called by the sci core when a link
236 * @isci_host: This parameter specifies the isci host object.
237 * @phy: This parameter specifies the isci phy with the active link.
238 * @port: This parameter specifies the isci port with the active link.
241 void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy,
242 struct isci_port *isci_port)
244 struct isci_remote_device *isci_device;
246 dev_dbg(&isci_host->pdev->dev,
247 "%s: isci_port = %p\n", __func__, isci_port);
251 /* check to see if this is the last phy on this port. */
252 if (isci_phy->sas_phy.port
253 && isci_phy->sas_phy.port->num_phys == 1) {
255 /* change the state for all devices on this port.
256 * The next task sent to this device will be returned
257 * as SAS_TASK_UNDELIVERED, and the scsi mid layer
258 * will remove the target
260 list_for_each_entry(isci_device,
261 &isci_port->remote_dev_list,
263 dev_dbg(&isci_host->pdev->dev,
264 "%s: isci_device = %p\n",
265 __func__, isci_device);
266 isci_remote_device_change_state(isci_device,
270 isci_port_change_state(isci_port, isci_stopping);
273 /* Notify libsas of the borken link, this will trigger calls to our
274 * isci_port_deformed and isci_dev_gone functions.
276 sas_phy_disconnected(&isci_phy->sas_phy);
277 isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy,
278 PHYE_LOSS_OF_SIGNAL);
280 isci_phy->isci_port = NULL;
282 dev_dbg(&isci_host->pdev->dev,
283 "%s: isci_port = %p - Done\n", __func__, isci_port);
288 * isci_port_deformed() - This function is called by libsas when a port becomes
290 * @phy: This parameter specifies the libsas phy with the inactive port.
293 void isci_port_deformed(
294 struct asd_sas_phy *phy)
296 pr_debug("%s: sas_phy = %p\n", __func__, phy);
300 * isci_port_formed() - This function is called by libsas when a port becomes
302 * @phy: This parameter specifies the libsas phy with the active port.
305 void isci_port_formed(
306 struct asd_sas_phy *phy)
308 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
312 * isci_port_ready() - This function is called by the sci core when a link
314 * @isci_host: This parameter specifies the isci host object.
315 * @port: This parameter specifies the sci port with the active link.
318 void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
320 dev_dbg(&isci_host->pdev->dev,
321 "%s: isci_port = %p\n", __func__, isci_port);
323 complete_all(&isci_port->start_complete);
324 isci_port_change_state(isci_port, isci_ready);
329 * isci_port_not_ready() - This function is called by the sci core when a link
330 * is not ready. All remote devices on this link will be removed if they are
331 * in the stopping state.
332 * @isci_host: This parameter specifies the isci host object.
333 * @port: This parameter specifies the sci port with the active link.
336 void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
338 dev_dbg(&isci_host->pdev->dev,
339 "%s: isci_port = %p\n", __func__, isci_port);
343 * isci_port_hard_reset_complete() - This function is called by the sci core
344 * when the hard reset complete notification has been received.
345 * @port: This parameter specifies the sci port with the active link.
346 * @completion_status: This parameter specifies the core status for the reset
350 void isci_port_hard_reset_complete(struct isci_port *isci_port,
351 enum sci_status completion_status)
353 dev_dbg(&isci_port->isci_host->pdev->dev,
354 "%s: isci_port = %p, completion_status=%x\n",
355 __func__, isci_port, completion_status);
357 /* Save the status of the hard reset from the port. */
358 isci_port->hard_reset_status = completion_status;
360 complete_all(&isci_port->hard_reset_complete);
363 int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
364 struct isci_phy *iphy)
367 enum sci_status status;
368 int ret = TMF_RESP_FUNC_COMPLETE;
370 dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
373 init_completion(&iport->hard_reset_complete);
375 spin_lock_irqsave(&ihost->scic_lock, flags);
377 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
378 status = scic_port_hard_reset(iport->sci_port_handle,
379 ISCI_PORT_RESET_TIMEOUT);
381 spin_unlock_irqrestore(&ihost->scic_lock, flags);
383 if (status == SCI_SUCCESS) {
384 wait_for_completion(&iport->hard_reset_complete);
386 dev_dbg(&ihost->pdev->dev,
387 "%s: iport = %p; hard reset completion\n",
390 if (iport->hard_reset_status != SCI_SUCCESS)
391 ret = TMF_RESP_FUNC_FAILED;
393 ret = TMF_RESP_FUNC_FAILED;
395 dev_err(&ihost->pdev->dev,
396 "%s: iport = %p; scic_port_hard_reset call"
398 __func__, iport, status);
402 /* If the hard reset for the port has failed, consider this
403 * the same as link failures on all phys in the port.
405 if (ret != TMF_RESP_FUNC_COMPLETE) {
406 dev_err(&ihost->pdev->dev,
407 "%s: iport = %p; hard reset failed "
408 "(0x%x) - sending link down to libsas for phy %p\n",
409 __func__, iport, iport->hard_reset_status, iphy);
411 isci_port_link_down(ihost, iphy, iport);
417 void isci_port_stop_complete(struct scic_sds_controller *scic,
418 struct scic_sds_port *sci_port,
419 enum sci_status completion_status)
421 dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");