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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);
79 void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index)
81 struct scic_sds_port *sci_port;
83 INIT_LIST_HEAD(&iport->remote_dev_list);
84 INIT_LIST_HEAD(&iport->domain_dev_list);
85 spin_lock_init(&iport->state_lock);
86 init_completion(&iport->start_complete);
87 iport->isci_host = ihost;
88 isci_port_change_state(iport, isci_freed);
90 sci_port = &ihost->sci.port_table[index];
91 iport->sci_port_handle = sci_port;
92 sci_port->iport = iport;
97 * isci_port_get_state() - This function gets the status of the port object.
98 * @isci_port: This parameter points to the isci_port object
100 * status of the object as a isci_status enum.
102 enum isci_status isci_port_get_state(
103 struct isci_port *isci_port)
105 return isci_port->status;
108 static void isci_port_change_state(
109 struct isci_port *isci_port,
110 enum isci_status status)
114 dev_dbg(&isci_port->isci_host->pdev->dev,
115 "%s: isci_port = %p, state = 0x%x\n",
116 __func__, isci_port, status);
118 spin_lock_irqsave(&isci_port->state_lock, flags);
119 isci_port->status = status;
120 spin_unlock_irqrestore(&isci_port->state_lock, flags);
123 void isci_port_bc_change_received(struct isci_host *ihost,
124 struct scic_sds_port *sci_port,
125 struct scic_sds_phy *sci_phy)
127 struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
129 dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n",
130 __func__, iphy, &iphy->sas_phy);
132 ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD);
133 scic_port_enable_broadcast_change_notification(sci_port);
136 void isci_port_link_up(struct isci_host *isci_host,
137 struct scic_sds_port *port,
138 struct scic_sds_phy *phy)
141 struct scic_port_properties properties;
142 struct isci_phy *isci_phy = sci_phy_to_iphy(phy);
143 struct isci_port *isci_port = port->iport;
144 unsigned long success = true;
146 BUG_ON(isci_phy->isci_port != NULL);
148 isci_phy->isci_port = isci_port;
150 dev_dbg(&isci_host->pdev->dev,
151 "%s: isci_port = %p\n",
152 __func__, isci_port);
154 spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags);
156 isci_port_change_state(isci_phy->isci_port, isci_starting);
158 scic_port_get_properties(port, &properties);
160 if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) {
161 u64 attached_sas_address;
163 isci_phy->sas_phy.oob_mode = SATA_OOB_MODE;
164 isci_phy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis);
167 * For direct-attached SATA devices, the SCI core will
168 * automagically assign a SAS address to the end device
169 * for the purpose of creating a port. This SAS address
170 * will not be the same as assigned to the PHY and needs
171 * to be obtained from struct scic_port_properties properties.
173 attached_sas_address = properties.remote.sas_address.high;
174 attached_sas_address <<= 32;
175 attached_sas_address |= properties.remote.sas_address.low;
176 swab64s(&attached_sas_address);
178 memcpy(&isci_phy->sas_phy.attached_sas_addr,
179 &attached_sas_address, sizeof(attached_sas_address));
180 } else if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) {
181 isci_phy->sas_phy.oob_mode = SAS_OOB_MODE;
182 isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame);
184 /* Copy the attached SAS address from the IAF */
185 memcpy(isci_phy->sas_phy.attached_sas_addr,
186 isci_phy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE);
188 dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__);
192 isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy);
194 spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags);
196 /* Notify libsas that we have an address frame, if indeed
197 * we've found an SSP, SMP, or STP target */
199 isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy,
205 * isci_port_link_down() - This function is called by the sci core when a link
207 * @isci_host: This parameter specifies the isci host object.
208 * @phy: This parameter specifies the isci phy with the active link.
209 * @port: This parameter specifies the isci port with the active link.
212 void isci_port_link_down(struct isci_host *isci_host, struct isci_phy *isci_phy,
213 struct isci_port *isci_port)
215 struct isci_remote_device *isci_device;
217 dev_dbg(&isci_host->pdev->dev,
218 "%s: isci_port = %p\n", __func__, isci_port);
222 /* check to see if this is the last phy on this port. */
223 if (isci_phy->sas_phy.port
224 && isci_phy->sas_phy.port->num_phys == 1) {
226 /* change the state for all devices on this port.
227 * The next task sent to this device will be returned
228 * as SAS_TASK_UNDELIVERED, and the scsi mid layer
229 * will remove the target
231 list_for_each_entry(isci_device,
232 &isci_port->remote_dev_list,
234 dev_dbg(&isci_host->pdev->dev,
235 "%s: isci_device = %p\n",
236 __func__, isci_device);
237 isci_remote_device_change_state(isci_device,
241 isci_port_change_state(isci_port, isci_stopping);
244 /* Notify libsas of the borken link, this will trigger calls to our
245 * isci_port_deformed and isci_dev_gone functions.
247 sas_phy_disconnected(&isci_phy->sas_phy);
248 isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy,
249 PHYE_LOSS_OF_SIGNAL);
251 isci_phy->isci_port = NULL;
253 dev_dbg(&isci_host->pdev->dev,
254 "%s: isci_port = %p - Done\n", __func__, isci_port);
259 * isci_port_deformed() - This function is called by libsas when a port becomes
261 * @phy: This parameter specifies the libsas phy with the inactive port.
264 void isci_port_deformed(
265 struct asd_sas_phy *phy)
267 pr_debug("%s: sas_phy = %p\n", __func__, phy);
271 * isci_port_formed() - This function is called by libsas when a port becomes
273 * @phy: This parameter specifies the libsas phy with the active port.
276 void isci_port_formed(
277 struct asd_sas_phy *phy)
279 pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port);
283 * isci_port_ready() - This function is called by the sci core when a link
285 * @isci_host: This parameter specifies the isci host object.
286 * @port: This parameter specifies the sci port with the active link.
289 void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port)
291 dev_dbg(&isci_host->pdev->dev,
292 "%s: isci_port = %p\n", __func__, isci_port);
294 complete_all(&isci_port->start_complete);
295 isci_port_change_state(isci_port, isci_ready);
300 * isci_port_not_ready() - This function is called by the sci core when a link
301 * is not ready. All remote devices on this link will be removed if they are
302 * in the stopping state.
303 * @isci_host: This parameter specifies the isci host object.
304 * @port: This parameter specifies the sci port with the active link.
307 void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port)
309 dev_dbg(&isci_host->pdev->dev,
310 "%s: isci_port = %p\n", __func__, isci_port);
314 * isci_port_hard_reset_complete() - This function is called by the sci core
315 * when the hard reset complete notification has been received.
316 * @port: This parameter specifies the sci port with the active link.
317 * @completion_status: This parameter specifies the core status for the reset
321 void isci_port_hard_reset_complete(struct isci_port *isci_port,
322 enum sci_status completion_status)
324 dev_dbg(&isci_port->isci_host->pdev->dev,
325 "%s: isci_port = %p, completion_status=%x\n",
326 __func__, isci_port, completion_status);
328 /* Save the status of the hard reset from the port. */
329 isci_port->hard_reset_status = completion_status;
331 complete_all(&isci_port->hard_reset_complete);
334 int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport,
335 struct isci_phy *iphy)
338 enum sci_status status;
339 int ret = TMF_RESP_FUNC_COMPLETE;
341 dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n",
344 init_completion(&iport->hard_reset_complete);
346 spin_lock_irqsave(&ihost->scic_lock, flags);
348 #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT
349 status = scic_port_hard_reset(iport->sci_port_handle,
350 ISCI_PORT_RESET_TIMEOUT);
352 spin_unlock_irqrestore(&ihost->scic_lock, flags);
354 if (status == SCI_SUCCESS) {
355 wait_for_completion(&iport->hard_reset_complete);
357 dev_dbg(&ihost->pdev->dev,
358 "%s: iport = %p; hard reset completion\n",
361 if (iport->hard_reset_status != SCI_SUCCESS)
362 ret = TMF_RESP_FUNC_FAILED;
364 ret = TMF_RESP_FUNC_FAILED;
366 dev_err(&ihost->pdev->dev,
367 "%s: iport = %p; scic_port_hard_reset call"
369 __func__, iport, status);
373 /* If the hard reset for the port has failed, consider this
374 * the same as link failures on all phys in the port.
376 if (ret != TMF_RESP_FUNC_COMPLETE) {
377 dev_err(&ihost->pdev->dev,
378 "%s: iport = %p; hard reset failed "
379 "(0x%x) - sending link down to libsas for phy %p\n",
380 __func__, iport, iport->hard_reset_status, iphy);
382 isci_port_link_down(ihost, iphy, iport);
388 void isci_port_stop_complete(struct scic_sds_controller *scic,
389 struct scic_sds_port *sci_port,
390 enum sci_status completion_status)
392 dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n");