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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(struct isci_port *iport, enum isci_status status)
77 dev_dbg(&iport->isci_host->pdev->dev,
78 "%s: iport = %p, state = 0x%x\n",
79 __func__, iport, status);
81 /* XXX pointless lock */
82 spin_lock_irqsave(&iport->state_lock, flags);
83 iport->status = status;
84 spin_unlock_irqrestore(&iport->state_lock, flags);
87 void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
89 INIT_LIST_HEAD(&iport->remote_dev_list);
90 INIT_LIST_HEAD(&iport->domain_dev_list);
91 spin_lock_init(&iport->state_lock);
92 init_completion(&iport->start_complete);
93 iport->isci_host = ihost;
94 isci_port_change_state(iport, isci_freed);
98 * isci_port_get_state() - This function gets the status of the port object.
99 * @isci_port: This parameter points to the isci_port object
101 * status of the object as a isci_status enum.
103 enum isci_status isci_port_get_state(
104 struct isci_port *isci_port)
106 return isci_port->status;
109 void isci_port_bc_change_received(struct isci_host *ihost,
110 struct scic_sds_port *sci_port,
111 struct scic_sds_phy *sci_phy)
113 struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
115 dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n",
116 __func__, iphy, &iphy->sas_phy);
118 ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD);
119 scic_port_enable_broadcast_change_notification(sci_port);
122 void isci_port_link_up(struct isci_host *isci_host,
123 struct scic_sds_port *port,
124 struct scic_sds_phy *phy)
127 struct scic_port_properties properties;
128 struct isci_phy *isci_phy = sci_phy_to_iphy(phy);
129 struct isci_port *isci_port = sci_port_to_iport(port);
130 unsigned long success = true;
132 BUG_ON(isci_phy->isci_port != NULL);
134 isci_phy->isci_port = isci_port;
136 dev_dbg(&isci_host->pdev->dev,
137 "%s: isci_port = %p\n",
138 __func__, isci_port);
140 spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags);
142 isci_port_change_state(isci_phy->isci_port, isci_starting);
144 scic_port_get_properties(port, &properties);
146 if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) {
147 u64 attached_sas_address;
149 isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
150 isci_phy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis);
153 * For direct-attached SATA devices, the SCI core will
154 * automagically assign a SAS address to the end device
155 * for the purpose of creating a port. This SAS address
156 * will not be the same as assigned to the PHY and needs
157 * to be obtained from struct scic_port_properties properties.
159 attached_sas_address = properties.remote.sas_address.high;
160 attached_sas_address <<= 32;
161 attached_sas_address |= properties.remote.sas_address.low;
162 swab64s(&attached_sas_address);
164 memcpy(&isci_phy->sas_phy.attached_sas_addr,
165 &attached_sas_address, sizeof(attached_sas_address));
166 } else if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) {
167 isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
168 isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame);
170 /* Copy the attached SAS address from the IAF */
171 memcpy(isci_phy->sas_phy.attached_sas_addr,
172 isci_phy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE);
174 dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
178 isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
180 spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags);
182 /* Notify libsas that we have an address frame, if indeed
183 * we've found an SSP, SMP, or STP target */
185 isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy,
191 * isci_port_link_down() - This function is called by the sci core when a link
193 * @isci_host: This parameter specifies the isci host object.
194 * @phy: This parameter specifies the isci phy with the active link.
195 * @port: This parameter specifies the isci port with the active link.
198 void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy,
199 struct isci_port *isci_port)
201 struct isci_remote_device *isci_device;
203 dev_dbg(&isci_host->pdev->dev,
204 "%s: isci_port = %p\n", __func__, isci_port);
208 /* check to see if this is the last phy on this port. */
209 if (isci_phy->sas_phy.port
210 && isci_phy->sas_phy.port->num_phys == 1) {
212 /* change the state for all devices on this port.
213 * The next task sent to this device will be returned
214 * as SAS_TASK_UNDELIVERED, and the scsi mid layer
215 * will remove the target
217 list_for_each_entry(isci_device,
218 &isci_port->remote_dev_list,
220 dev_dbg(&isci_host->pdev->dev,
221 "%s: isci_device = %p\n",
222 __func__, isci_device);
223 isci_remote_device_change_state(isci_device,
227 isci_port_change_state(isci_port, isci_stopping);
230 /* Notify libsas of the borken link, this will trigger calls to our
231 * isci_port_deformed and isci_dev_gone functions.
233 sas_phy_disconnected(&isci_phy->sas_phy);
234 isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy,
235 PHYE_LOSS_OF_SIGNAL);
237 isci_phy->isci_port = NULL;
239 dev_dbg(&isci_host->pdev->dev,
240 "%s: isci_port = %p - Done\n", __func__, isci_port);
245 * isci_port_deformed() - This function is called by libsas when a port becomes
247 * @phy: This parameter specifies the libsas phy with the inactive port.
250 void isci_port_deformed(
251 struct asd_sas_phy *phy)
253 pr_debug("%s: sas_phy = %p\n", __func__, phy);
257 * isci_port_formed() - This function is called by libsas when a port becomes
259 * @phy: This parameter specifies the libsas phy with the active port.
262 void isci_port_formed(
263 struct asd_sas_phy *phy)
265 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
269 * isci_port_ready() - This function is called by the sci core when a link
271 * @isci_host: This parameter specifies the isci host object.
272 * @port: This parameter specifies the sci port with the active link.
275 void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
277 dev_dbg(&isci_host->pdev->dev,
278 "%s: isci_port = %p\n", __func__, isci_port);
280 complete_all(&isci_port->start_complete);
281 isci_port_change_state(isci_port, isci_ready);
286 * isci_port_not_ready() - This function is called by the sci core when a link
287 * is not ready. All remote devices on this link will be removed if they are
288 * in the stopping state.
289 * @isci_host: This parameter specifies the isci host object.
290 * @port: This parameter specifies the sci port with the active link.
293 void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
295 dev_dbg(&isci_host->pdev->dev,
296 "%s: isci_port = %p\n", __func__, isci_port);
300 * isci_port_hard_reset_complete() - This function is called by the sci core
301 * when the hard reset complete notification has been received.
302 * @port: This parameter specifies the sci port with the active link.
303 * @completion_status: This parameter specifies the core status for the reset
307 void isci_port_hard_reset_complete(struct isci_port *isci_port,
308 enum sci_status completion_status)
310 dev_dbg(&isci_port->isci_host->pdev->dev,
311 "%s: isci_port = %p, completion_status=%x\n",
312 __func__, isci_port, completion_status);
314 /* Save the status of the hard reset from the port. */
315 isci_port->hard_reset_status = completion_status;
317 complete_all(&isci_port->hard_reset_complete);
320 int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
321 struct isci_phy *iphy)
324 enum sci_status status;
325 int ret = TMF_RESP_FUNC_COMPLETE;
327 dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
330 init_completion(&iport->hard_reset_complete);
332 spin_lock_irqsave(&ihost->scic_lock, flags);
334 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
335 status = scic_port_hard_reset(&iport->sci, ISCI_PORT_RESET_TIMEOUT);
337 spin_unlock_irqrestore(&ihost->scic_lock, flags);
339 if (status == SCI_SUCCESS) {
340 wait_for_completion(&iport->hard_reset_complete);
342 dev_dbg(&ihost->pdev->dev,
343 "%s: iport = %p; hard reset completion\n",
346 if (iport->hard_reset_status != SCI_SUCCESS)
347 ret = TMF_RESP_FUNC_FAILED;
349 ret = TMF_RESP_FUNC_FAILED;
351 dev_err(&ihost->pdev->dev,
352 "%s: iport = %p; scic_port_hard_reset call"
354 __func__, iport, status);
358 /* If the hard reset for the port has failed, consider this
359 * the same as link failures on all phys in the port.
361 if (ret != TMF_RESP_FUNC_COMPLETE) {
362 dev_err(&ihost->pdev->dev,
363 "%s: iport = %p; hard reset failed "
364 "(0x%x) - sending link down to libsas for phy %p\n",
365 __func__, iport, iport->hard_reset_status, iphy);
367 isci_port_link_down(ihost, iphy, iport);
373 void isci_port_stop_complete(struct scic_sds_controller *scic,
374 struct scic_sds_port *sci_port,
375 enum sci_status completion_status)
377 dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");