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6f231dda DW |
1 | /* |
2 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
3 | * redistributing this file, you may do so under either license. | |
4 | * | |
5 | * GPL LICENSE SUMMARY | |
6 | * | |
7 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of version 2 of the GNU General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | * The full GNU General Public License is included in this distribution | |
22 | * in the file called LICENSE.GPL. | |
23 | * | |
24 | * BSD LICENSE | |
25 | * | |
26 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. | |
27 | * All rights reserved. | |
28 | * | |
29 | * Redistribution and use in source and binary forms, with or without | |
30 | * modification, are permitted provided that the following conditions | |
31 | * are met: | |
32 | * | |
33 | * * Redistributions of source code must retain the above copyright | |
34 | * notice, this list of conditions and the following disclaimer. | |
35 | * * Redistributions in binary form must reproduce the above copyright | |
36 | * notice, this list of conditions and the following disclaimer in | |
37 | * the documentation and/or other materials provided with the | |
38 | * distribution. | |
39 | * * Neither the name of Intel Corporation nor the names of its | |
40 | * contributors may be used to endorse or promote products derived | |
41 | * from this software without specific prior written permission. | |
42 | * | |
43 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
44 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
45 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
46 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
47 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
48 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
49 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
50 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
51 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
52 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
53 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
54 | */ | |
55 | ||
6f231dda | 56 | #include "isci.h" |
6f231dda DW |
57 | #include "port.h" |
58 | #include "request.h" | |
e2f8db50 DW |
59 | #include "timers.h" |
60 | ||
61 | #define SCIC_SDS_PORT_HARD_RESET_TIMEOUT (1000) | |
62 | #define SCU_DUMMY_INDEX (0xFFFF) | |
6f231dda | 63 | |
e91f41ef PS |
64 | static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[]; |
65 | ||
e531381e DW |
66 | static void isci_port_change_state(struct isci_port *iport, enum isci_status status) |
67 | { | |
68 | unsigned long flags; | |
6f231dda | 69 | |
e531381e DW |
70 | dev_dbg(&iport->isci_host->pdev->dev, |
71 | "%s: iport = %p, state = 0x%x\n", | |
72 | __func__, iport, status); | |
6f231dda | 73 | |
e531381e DW |
74 | /* XXX pointless lock */ |
75 | spin_lock_irqsave(&iport->state_lock, flags); | |
76 | iport->status = status; | |
77 | spin_unlock_irqrestore(&iport->state_lock, flags); | |
78 | } | |
6f231dda | 79 | |
e2f8db50 DW |
80 | /* |
81 | * This function will indicate which protocols are supported by this port. | |
82 | * @sci_port: a handle corresponding to the SAS port for which to return the | |
83 | * supported protocols. | |
84 | * @protocols: This parameter specifies a pointer to a data structure | |
85 | * which the core will copy the protocol values for the port from the | |
86 | * transmit_identification register. | |
87 | */ | |
88 | static void | |
89 | scic_sds_port_get_protocols(struct scic_sds_port *sci_port, | |
90 | struct scic_phy_proto *protocols) | |
6f231dda | 91 | { |
e2f8db50 DW |
92 | u8 index; |
93 | ||
94 | protocols->all = 0; | |
95 | ||
96 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
97 | if (sci_port->phy_table[index] != NULL) { | |
98 | scic_sds_phy_get_protocols(sci_port->phy_table[index], | |
99 | protocols); | |
100 | } | |
101 | } | |
6f231dda DW |
102 | } |
103 | ||
6f231dda | 104 | /** |
e2f8db50 DW |
105 | * This method requests a list (mask) of the phys contained in the supplied SAS |
106 | * port. | |
107 | * @sci_port: a handle corresponding to the SAS port for which to return the | |
108 | * phy mask. | |
6f231dda | 109 | * |
e2f8db50 DW |
110 | * Return a bit mask indicating which phys are a part of this port. Each bit |
111 | * corresponds to a phy identifier (e.g. bit 0 = phy id 0). | |
6f231dda | 112 | */ |
e2f8db50 | 113 | static u32 scic_sds_port_get_phys(struct scic_sds_port *sci_port) |
6f231dda | 114 | { |
e2f8db50 DW |
115 | u32 index; |
116 | u32 mask; | |
117 | ||
118 | mask = 0; | |
119 | ||
120 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
121 | if (sci_port->phy_table[index] != NULL) { | |
122 | mask |= (1 << index); | |
123 | } | |
124 | } | |
125 | ||
126 | return mask; | |
6f231dda DW |
127 | } |
128 | ||
e2f8db50 DW |
129 | /** |
130 | * scic_port_get_properties() - This method simply returns the properties | |
131 | * regarding the port, such as: physical index, protocols, sas address, etc. | |
132 | * @port: this parameter specifies the port for which to retrieve the physical | |
133 | * index. | |
134 | * @properties: This parameter specifies the properties structure into which to | |
135 | * copy the requested information. | |
136 | * | |
137 | * Indicate if the user specified a valid port. SCI_SUCCESS This value is | |
138 | * returned if the specified port was valid. SCI_FAILURE_INVALID_PORT This | |
139 | * value is returned if the specified port is not valid. When this value is | |
140 | * returned, no data is copied to the properties output parameter. | |
141 | */ | |
142 | static enum sci_status scic_port_get_properties(struct scic_sds_port *port, | |
143 | struct scic_port_properties *prop) | |
6f231dda | 144 | { |
e2f8db50 DW |
145 | if ((port == NULL) || |
146 | (port->logical_port_index == SCIC_SDS_DUMMY_PORT)) | |
147 | return SCI_FAILURE_INVALID_PORT; | |
6f231dda | 148 | |
e2f8db50 DW |
149 | prop->index = port->logical_port_index; |
150 | prop->phy_mask = scic_sds_port_get_phys(port); | |
151 | scic_sds_port_get_sas_address(port, &prop->local.sas_address); | |
152 | scic_sds_port_get_protocols(port, &prop->local.protocols); | |
153 | scic_sds_port_get_attached_sas_address(port, &prop->remote.sas_address); | |
6f231dda | 154 | |
e2f8db50 | 155 | return SCI_SUCCESS; |
6f231dda DW |
156 | } |
157 | ||
e2f8db50 DW |
158 | static void isci_port_link_up(struct isci_host *isci_host, |
159 | struct scic_sds_port *port, | |
160 | struct scic_sds_phy *phy) | |
6f231dda DW |
161 | { |
162 | unsigned long flags; | |
163 | struct scic_port_properties properties; | |
4b33981a | 164 | struct isci_phy *isci_phy = sci_phy_to_iphy(phy); |
e531381e | 165 | struct isci_port *isci_port = sci_port_to_iport(port); |
6f231dda DW |
166 | unsigned long success = true; |
167 | ||
168 | BUG_ON(isci_phy->isci_port != NULL); | |
6cb4d6b3 | 169 | |
6f231dda DW |
170 | isci_phy->isci_port = isci_port; |
171 | ||
172 | dev_dbg(&isci_host->pdev->dev, | |
173 | "%s: isci_port = %p\n", | |
174 | __func__, isci_port); | |
175 | ||
176 | spin_lock_irqsave(&isci_phy->sas_phy.frame_rcvd_lock, flags); | |
177 | ||
178 | isci_port_change_state(isci_phy->isci_port, isci_starting); | |
179 | ||
180 | scic_port_get_properties(port, &properties); | |
181 | ||
d7b90fc3 | 182 | if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) { |
150fc6fc | 183 | u64 attached_sas_address; |
6f231dda | 184 | |
6f231dda | 185 | isci_phy->sas_phy.oob_mode = SATA_OOB_MODE; |
f2f30080 | 186 | isci_phy->sas_phy.frame_rcvd_size = sizeof(struct dev_to_host_fis); |
6f231dda DW |
187 | |
188 | /* | |
189 | * For direct-attached SATA devices, the SCI core will | |
190 | * automagically assign a SAS address to the end device | |
191 | * for the purpose of creating a port. This SAS address | |
192 | * will not be the same as assigned to the PHY and needs | |
193 | * to be obtained from struct scic_port_properties properties. | |
194 | */ | |
150fc6fc DW |
195 | attached_sas_address = properties.remote.sas_address.high; |
196 | attached_sas_address <<= 32; | |
197 | attached_sas_address |= properties.remote.sas_address.low; | |
198 | swab64s(&attached_sas_address); | |
6f231dda | 199 | |
150fc6fc DW |
200 | memcpy(&isci_phy->sas_phy.attached_sas_addr, |
201 | &attached_sas_address, sizeof(attached_sas_address)); | |
d7b90fc3 | 202 | } else if (phy->protocol == SCIC_SDS_PHY_PROTOCOL_SAS) { |
6f231dda | 203 | isci_phy->sas_phy.oob_mode = SAS_OOB_MODE; |
4b7ebd05 | 204 | isci_phy->sas_phy.frame_rcvd_size = sizeof(struct sas_identify_frame); |
6f231dda DW |
205 | |
206 | /* Copy the attached SAS address from the IAF */ | |
207 | memcpy(isci_phy->sas_phy.attached_sas_addr, | |
4b7ebd05 | 208 | isci_phy->frame_rcvd.iaf.sas_addr, SAS_ADDR_SIZE); |
6f231dda DW |
209 | } else { |
210 | dev_err(&isci_host->pdev->dev, "%s: unkown target\n", __func__); | |
211 | success = false; | |
212 | } | |
213 | ||
83e51430 DW |
214 | isci_phy->sas_phy.phy->negotiated_linkrate = sci_phy_linkrate(phy); |
215 | ||
6f231dda DW |
216 | spin_unlock_irqrestore(&isci_phy->sas_phy.frame_rcvd_lock, flags); |
217 | ||
218 | /* Notify libsas that we have an address frame, if indeed | |
219 | * we've found an SSP, SMP, or STP target */ | |
220 | if (success) | |
221 | isci_host->sas_ha.notify_port_event(&isci_phy->sas_phy, | |
222 | PORTE_BYTES_DMAED); | |
223 | } | |
224 | ||
225 | ||
226 | /** | |
227 | * isci_port_link_down() - This function is called by the sci core when a link | |
228 | * becomes inactive. | |
229 | * @isci_host: This parameter specifies the isci host object. | |
230 | * @phy: This parameter specifies the isci phy with the active link. | |
231 | * @port: This parameter specifies the isci port with the active link. | |
232 | * | |
233 | */ | |
e2f8db50 DW |
234 | static void isci_port_link_down(struct isci_host *isci_host, |
235 | struct isci_phy *isci_phy, | |
236 | struct isci_port *isci_port) | |
6f231dda DW |
237 | { |
238 | struct isci_remote_device *isci_device; | |
239 | ||
240 | dev_dbg(&isci_host->pdev->dev, | |
241 | "%s: isci_port = %p\n", __func__, isci_port); | |
242 | ||
243 | if (isci_port) { | |
244 | ||
245 | /* check to see if this is the last phy on this port. */ | |
246 | if (isci_phy->sas_phy.port | |
247 | && isci_phy->sas_phy.port->num_phys == 1) { | |
248 | ||
249 | /* change the state for all devices on this port. | |
250 | * The next task sent to this device will be returned | |
251 | * as SAS_TASK_UNDELIVERED, and the scsi mid layer | |
252 | * will remove the target | |
253 | */ | |
254 | list_for_each_entry(isci_device, | |
255 | &isci_port->remote_dev_list, | |
256 | node) { | |
257 | dev_dbg(&isci_host->pdev->dev, | |
258 | "%s: isci_device = %p\n", | |
259 | __func__, isci_device); | |
260 | isci_remote_device_change_state(isci_device, | |
261 | isci_stopping); | |
262 | } | |
263 | } | |
264 | isci_port_change_state(isci_port, isci_stopping); | |
265 | } | |
266 | ||
267 | /* Notify libsas of the borken link, this will trigger calls to our | |
268 | * isci_port_deformed and isci_dev_gone functions. | |
269 | */ | |
270 | sas_phy_disconnected(&isci_phy->sas_phy); | |
271 | isci_host->sas_ha.notify_phy_event(&isci_phy->sas_phy, | |
272 | PHYE_LOSS_OF_SIGNAL); | |
273 | ||
274 | isci_phy->isci_port = NULL; | |
275 | ||
276 | dev_dbg(&isci_host->pdev->dev, | |
277 | "%s: isci_port = %p - Done\n", __func__, isci_port); | |
278 | } | |
279 | ||
280 | ||
6f231dda DW |
281 | /** |
282 | * isci_port_ready() - This function is called by the sci core when a link | |
283 | * becomes ready. | |
284 | * @isci_host: This parameter specifies the isci host object. | |
285 | * @port: This parameter specifies the sci port with the active link. | |
286 | * | |
287 | */ | |
e2f8db50 | 288 | static void isci_port_ready(struct isci_host *isci_host, struct isci_port *isci_port) |
6f231dda DW |
289 | { |
290 | dev_dbg(&isci_host->pdev->dev, | |
291 | "%s: isci_port = %p\n", __func__, isci_port); | |
292 | ||
293 | complete_all(&isci_port->start_complete); | |
294 | isci_port_change_state(isci_port, isci_ready); | |
295 | return; | |
296 | } | |
297 | ||
298 | /** | |
299 | * isci_port_not_ready() - This function is called by the sci core when a link | |
300 | * is not ready. All remote devices on this link will be removed if they are | |
301 | * in the stopping state. | |
302 | * @isci_host: This parameter specifies the isci host object. | |
303 | * @port: This parameter specifies the sci port with the active link. | |
304 | * | |
305 | */ | |
e2f8db50 | 306 | static void isci_port_not_ready(struct isci_host *isci_host, struct isci_port *isci_port) |
6f231dda DW |
307 | { |
308 | dev_dbg(&isci_host->pdev->dev, | |
309 | "%s: isci_port = %p\n", __func__, isci_port); | |
310 | } | |
311 | ||
e2f8db50 DW |
312 | static void isci_port_stop_complete(struct scic_sds_controller *scic, |
313 | struct scic_sds_port *sci_port, | |
314 | enum sci_status completion_status) | |
315 | { | |
316 | dev_dbg(&scic_to_ihost(scic)->pdev->dev, "Port stop complete\n"); | |
317 | } | |
318 | ||
6f231dda DW |
319 | /** |
320 | * isci_port_hard_reset_complete() - This function is called by the sci core | |
321 | * when the hard reset complete notification has been received. | |
322 | * @port: This parameter specifies the sci port with the active link. | |
323 | * @completion_status: This parameter specifies the core status for the reset | |
324 | * process. | |
325 | * | |
326 | */ | |
e2f8db50 DW |
327 | static void isci_port_hard_reset_complete(struct isci_port *isci_port, |
328 | enum sci_status completion_status) | |
6f231dda DW |
329 | { |
330 | dev_dbg(&isci_port->isci_host->pdev->dev, | |
331 | "%s: isci_port = %p, completion_status=%x\n", | |
332 | __func__, isci_port, completion_status); | |
333 | ||
334 | /* Save the status of the hard reset from the port. */ | |
335 | isci_port->hard_reset_status = completion_status; | |
336 | ||
337 | complete_all(&isci_port->hard_reset_complete); | |
338 | } | |
4393aa4e | 339 | |
e2f8db50 DW |
340 | /* This method will return a true value if the specified phy can be assigned to |
341 | * this port The following is a list of phys for each port that are allowed: - | |
342 | * Port 0 - 3 2 1 0 - Port 1 - 1 - Port 2 - 3 2 - Port 3 - 3 This method | |
343 | * doesn't preclude all configurations. It merely ensures that a phy is part | |
344 | * of the allowable set of phy identifiers for that port. For example, one | |
345 | * could assign phy 3 to port 0 and no other phys. Please refer to | |
346 | * scic_sds_port_is_phy_mask_valid() for information regarding whether the | |
347 | * phy_mask for a port can be supported. bool true if this is a valid phy | |
348 | * assignment for the port false if this is not a valid phy assignment for the | |
349 | * port | |
350 | */ | |
351 | bool scic_sds_port_is_valid_phy_assignment(struct scic_sds_port *sci_port, | |
352 | u32 phy_index) | |
6f231dda | 353 | { |
e2f8db50 DW |
354 | /* Initialize to invalid value. */ |
355 | u32 existing_phy_index = SCI_MAX_PHYS; | |
356 | u32 index; | |
6f231dda | 357 | |
e2f8db50 DW |
358 | if ((sci_port->physical_port_index == 1) && (phy_index != 1)) { |
359 | return false; | |
360 | } | |
6f231dda | 361 | |
e2f8db50 DW |
362 | if (sci_port->physical_port_index == 3 && phy_index != 3) { |
363 | return false; | |
364 | } | |
6f231dda | 365 | |
e2f8db50 DW |
366 | if ( |
367 | (sci_port->physical_port_index == 2) | |
368 | && ((phy_index == 0) || (phy_index == 1)) | |
369 | ) { | |
370 | return false; | |
371 | } | |
6f231dda | 372 | |
e2f8db50 DW |
373 | for (index = 0; index < SCI_MAX_PHYS; index++) { |
374 | if ((sci_port->phy_table[index] != NULL) | |
375 | && (index != phy_index)) { | |
376 | existing_phy_index = index; | |
377 | } | |
378 | } | |
6f231dda | 379 | |
e2f8db50 DW |
380 | /* |
381 | * Ensure that all of the phys in the port are capable of | |
382 | * operating at the same maximum link rate. */ | |
383 | if ( | |
384 | (existing_phy_index < SCI_MAX_PHYS) | |
385 | && (sci_port->owning_controller->user_parameters.sds1.phys[ | |
386 | phy_index].max_speed_generation != | |
387 | sci_port->owning_controller->user_parameters.sds1.phys[ | |
388 | existing_phy_index].max_speed_generation) | |
389 | ) | |
390 | return false; | |
6f231dda | 391 | |
e2f8db50 DW |
392 | return true; |
393 | } | |
6f231dda | 394 | |
e2f8db50 DW |
395 | /** |
396 | * | |
397 | * @sci_port: This is the port object for which to determine if the phy mask | |
398 | * can be supported. | |
399 | * | |
400 | * This method will return a true value if the port's phy mask can be supported | |
401 | * by the SCU. The following is a list of valid PHY mask configurations for | |
402 | * each port: - Port 0 - [[3 2] 1] 0 - Port 1 - [1] - Port 2 - [[3] 2] | |
403 | * - Port 3 - [3] This method returns a boolean indication specifying if the | |
404 | * phy mask can be supported. true if this is a valid phy assignment for the | |
405 | * port false if this is not a valid phy assignment for the port | |
406 | */ | |
407 | static bool scic_sds_port_is_phy_mask_valid( | |
408 | struct scic_sds_port *sci_port, | |
409 | u32 phy_mask) | |
410 | { | |
411 | if (sci_port->physical_port_index == 0) { | |
412 | if (((phy_mask & 0x0F) == 0x0F) | |
413 | || ((phy_mask & 0x03) == 0x03) | |
414 | || ((phy_mask & 0x01) == 0x01) | |
415 | || (phy_mask == 0)) | |
416 | return true; | |
417 | } else if (sci_port->physical_port_index == 1) { | |
418 | if (((phy_mask & 0x02) == 0x02) | |
419 | || (phy_mask == 0)) | |
420 | return true; | |
421 | } else if (sci_port->physical_port_index == 2) { | |
422 | if (((phy_mask & 0x0C) == 0x0C) | |
423 | || ((phy_mask & 0x04) == 0x04) | |
424 | || (phy_mask == 0)) | |
425 | return true; | |
426 | } else if (sci_port->physical_port_index == 3) { | |
427 | if (((phy_mask & 0x08) == 0x08) | |
428 | || (phy_mask == 0)) | |
429 | return true; | |
430 | } | |
6f231dda | 431 | |
e2f8db50 DW |
432 | return false; |
433 | } | |
6f231dda | 434 | |
e2f8db50 DW |
435 | /** |
436 | * | |
437 | * @sci_port: This parameter specifies the port from which to return a | |
438 | * connected phy. | |
439 | * | |
440 | * This method retrieves a currently active (i.e. connected) phy contained in | |
441 | * the port. Currently, the lowest order phy that is connected is returned. | |
442 | * This method returns a pointer to a SCIS_SDS_PHY object. NULL This value is | |
443 | * returned if there are no currently active (i.e. connected to a remote end | |
444 | * point) phys contained in the port. All other values specify a struct scic_sds_phy | |
445 | * object that is active in the port. | |
446 | */ | |
447 | static struct scic_sds_phy *scic_sds_port_get_a_connected_phy( | |
448 | struct scic_sds_port *sci_port | |
449 | ) { | |
450 | u32 index; | |
451 | struct scic_sds_phy *phy; | |
6f231dda | 452 | |
e2f8db50 DW |
453 | for (index = 0; index < SCI_MAX_PHYS; index++) { |
454 | /* | |
455 | * Ensure that the phy is both part of the port and currently | |
456 | * connected to the remote end-point. */ | |
457 | phy = sci_port->phy_table[index]; | |
458 | if ( | |
459 | (phy != NULL) | |
460 | && scic_sds_port_active_phy(sci_port, phy) | |
461 | ) { | |
462 | return phy; | |
463 | } | |
6f231dda DW |
464 | } |
465 | ||
e2f8db50 DW |
466 | return NULL; |
467 | } | |
468 | ||
469 | /** | |
470 | * scic_sds_port_set_phy() - | |
471 | * @out]: port The port object to which the phy assignement is being made. | |
472 | * @out]: phy The phy which is being assigned to the port. | |
473 | * | |
474 | * This method attempts to make the assignment of the phy to the port. If | |
475 | * successful the phy is assigned to the ports phy table. bool true if the phy | |
476 | * assignment can be made. false if the phy assignement can not be made. This | |
477 | * is a functional test that only fails if the phy is currently assigned to a | |
478 | * different port. | |
479 | */ | |
480 | static enum sci_status scic_sds_port_set_phy( | |
481 | struct scic_sds_port *port, | |
482 | struct scic_sds_phy *phy) | |
483 | { | |
484 | /* | |
485 | * Check to see if we can add this phy to a port | |
486 | * that means that the phy is not part of a port and that the port does | |
487 | * not already have a phy assinged to the phy index. */ | |
488 | if ( | |
489 | (port->phy_table[phy->phy_index] == NULL) | |
4f20ef4f | 490 | && (phy_get_non_dummy_port(phy) == NULL) |
e2f8db50 DW |
491 | && scic_sds_port_is_valid_phy_assignment(port, phy->phy_index) |
492 | ) { | |
493 | /* | |
494 | * Phy is being added in the stopped state so we are in MPC mode | |
495 | * make logical port index = physical port index */ | |
496 | port->logical_port_index = port->physical_port_index; | |
497 | port->phy_table[phy->phy_index] = phy; | |
498 | scic_sds_phy_set_port(phy, port); | |
499 | ||
500 | return SCI_SUCCESS; | |
501 | } | |
502 | ||
503 | return SCI_FAILURE; | |
504 | } | |
505 | ||
506 | /** | |
507 | * scic_sds_port_clear_phy() - | |
508 | * @out]: port The port from which the phy is being cleared. | |
509 | * @out]: phy The phy being cleared from the port. | |
510 | * | |
511 | * This method will clear the phy assigned to this port. This method fails if | |
512 | * this phy is not currently assinged to this port. bool true if the phy is | |
513 | * removed from the port. false if this phy is not assined to this port. | |
514 | */ | |
515 | static enum sci_status scic_sds_port_clear_phy( | |
516 | struct scic_sds_port *port, | |
517 | struct scic_sds_phy *phy) | |
518 | { | |
519 | /* Make sure that this phy is part of this port */ | |
520 | if (port->phy_table[phy->phy_index] == phy && | |
4f20ef4f | 521 | phy_get_non_dummy_port(phy) == port) { |
e2f8db50 DW |
522 | struct scic_sds_controller *scic = port->owning_controller; |
523 | struct isci_host *ihost = scic_to_ihost(scic); | |
524 | ||
525 | /* Yep it is assigned to this port so remove it */ | |
526 | scic_sds_phy_set_port(phy, &ihost->ports[SCI_MAX_PORTS].sci); | |
527 | port->phy_table[phy->phy_index] = NULL; | |
528 | return SCI_SUCCESS; | |
529 | } | |
530 | ||
531 | return SCI_FAILURE; | |
532 | } | |
533 | ||
534 | /** | |
535 | * scic_sds_port_add_phy() - | |
536 | * @sci_port: This parameter specifies the port in which the phy will be added. | |
537 | * @sci_phy: This parameter is the phy which is to be added to the port. | |
538 | * | |
539 | * This method will add a PHY to the selected port. This method returns an | |
540 | * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other status | |
541 | * is failre to add the phy to the port. | |
542 | */ | |
543 | enum sci_status scic_sds_port_add_phy( | |
544 | struct scic_sds_port *sci_port, | |
545 | struct scic_sds_phy *sci_phy) | |
546 | { | |
547 | return sci_port->state_handlers->add_phy_handler( | |
548 | sci_port, sci_phy); | |
549 | } | |
550 | ||
551 | ||
552 | /** | |
553 | * scic_sds_port_remove_phy() - | |
554 | * @sci_port: This parameter specifies the port in which the phy will be added. | |
555 | * @sci_phy: This parameter is the phy which is to be added to the port. | |
556 | * | |
557 | * This method will remove the PHY from the selected PORT. This method returns | |
558 | * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any other | |
559 | * status is failre to add the phy to the port. | |
560 | */ | |
561 | enum sci_status scic_sds_port_remove_phy( | |
562 | struct scic_sds_port *sci_port, | |
563 | struct scic_sds_phy *sci_phy) | |
564 | { | |
565 | return sci_port->state_handlers->remove_phy_handler( | |
566 | sci_port, sci_phy); | |
567 | } | |
568 | ||
569 | /** | |
570 | * This method requests the SAS address for the supplied SAS port from the SCI | |
571 | * implementation. | |
572 | * @sci_port: a handle corresponding to the SAS port for which to return the | |
573 | * SAS address. | |
574 | * @sas_address: This parameter specifies a pointer to a SAS address structure | |
575 | * into which the core will copy the SAS address for the port. | |
576 | * | |
577 | */ | |
578 | void scic_sds_port_get_sas_address( | |
579 | struct scic_sds_port *sci_port, | |
580 | struct sci_sas_address *sas_address) | |
581 | { | |
582 | u32 index; | |
583 | ||
584 | sas_address->high = 0; | |
585 | sas_address->low = 0; | |
586 | ||
587 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
588 | if (sci_port->phy_table[index] != NULL) { | |
589 | scic_sds_phy_get_sas_address(sci_port->phy_table[index], sas_address); | |
590 | } | |
591 | } | |
592 | } | |
593 | ||
594 | /* | |
595 | * This function requests the SAS address for the device directly attached to | |
596 | * this SAS port. | |
597 | * @sci_port: a handle corresponding to the SAS port for which to return the | |
598 | * SAS address. | |
599 | * @sas_address: This parameter specifies a pointer to a SAS address structure | |
600 | * into which the core will copy the SAS address for the device directly | |
601 | * attached to the port. | |
602 | * | |
603 | */ | |
604 | void scic_sds_port_get_attached_sas_address( | |
605 | struct scic_sds_port *sci_port, | |
606 | struct sci_sas_address *sas_address) | |
607 | { | |
608 | struct scic_sds_phy *sci_phy; | |
609 | ||
610 | /* | |
611 | * Ensure that the phy is both part of the port and currently | |
612 | * connected to the remote end-point. | |
6f231dda | 613 | */ |
e2f8db50 DW |
614 | sci_phy = scic_sds_port_get_a_connected_phy(sci_port); |
615 | if (sci_phy) { | |
616 | if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) { | |
617 | scic_sds_phy_get_attached_sas_address(sci_phy, | |
618 | sas_address); | |
619 | } else { | |
620 | scic_sds_phy_get_sas_address(sci_phy, sas_address); | |
621 | sas_address->low += sci_phy->phy_index; | |
622 | } | |
623 | } else { | |
624 | sas_address->high = 0; | |
625 | sas_address->low = 0; | |
626 | } | |
627 | } | |
4393aa4e | 628 | |
e2f8db50 DW |
629 | /** |
630 | * scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround | |
631 | * | |
632 | * @sci_port: logical port on which we need to create the remote node context | |
633 | * @rni: remote node index for this remote node context. | |
634 | * | |
635 | * This routine will construct a dummy remote node context data structure | |
636 | * This structure will be posted to the hardware to work around a scheduler | |
637 | * error in the hardware. | |
638 | */ | |
639 | static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u16 rni) | |
640 | { | |
641 | union scu_remote_node_context *rnc; | |
642 | ||
643 | rnc = &sci_port->owning_controller->remote_node_context_table[rni]; | |
644 | ||
645 | memset(rnc, 0, sizeof(union scu_remote_node_context)); | |
646 | ||
647 | rnc->ssp.remote_sas_address_hi = 0; | |
648 | rnc->ssp.remote_sas_address_lo = 0; | |
649 | ||
650 | rnc->ssp.remote_node_index = rni; | |
651 | rnc->ssp.remote_node_port_width = 1; | |
652 | rnc->ssp.logical_port_index = sci_port->physical_port_index; | |
653 | ||
654 | rnc->ssp.nexus_loss_timer_enable = false; | |
655 | rnc->ssp.check_bit = false; | |
656 | rnc->ssp.is_valid = true; | |
657 | rnc->ssp.is_remote_node_context = true; | |
658 | rnc->ssp.function_number = 0; | |
659 | rnc->ssp.arbitration_wait_time = 0; | |
660 | } | |
661 | ||
662 | /** | |
663 | * scic_sds_port_construct_dummy_task() - create dummy task for si workaround | |
664 | * @sci_port The logical port on which we need to create the | |
665 | * remote node context. | |
666 | * context. | |
667 | * @tci The remote node index for this remote node context. | |
668 | * | |
669 | * This routine will construct a dummy task context data structure. This | |
670 | * structure will be posted to the hardwre to work around a scheduler error | |
671 | * in the hardware. | |
672 | * | |
673 | */ | |
674 | static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci) | |
675 | { | |
676 | struct scu_task_context *task_context; | |
677 | ||
678 | task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci); | |
679 | ||
680 | memset(task_context, 0, sizeof(struct scu_task_context)); | |
681 | ||
682 | task_context->abort = 0; | |
683 | task_context->priority = 0; | |
684 | task_context->initiator_request = 1; | |
685 | task_context->connection_rate = 1; | |
686 | task_context->protocol_engine_index = 0; | |
687 | task_context->logical_port_index = sci_port->physical_port_index; | |
688 | task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; | |
689 | task_context->task_index = scic_sds_io_tag_get_index(tci); | |
690 | task_context->valid = SCU_TASK_CONTEXT_VALID; | |
691 | task_context->context_type = SCU_TASK_CONTEXT_TYPE; | |
692 | ||
693 | task_context->remote_node_index = sci_port->reserved_rni; | |
694 | task_context->command_code = 0; | |
695 | ||
696 | task_context->link_layer_control = 0; | |
697 | task_context->do_not_dma_ssp_good_response = 1; | |
698 | task_context->strict_ordering = 0; | |
699 | task_context->control_frame = 0; | |
700 | task_context->timeout_enable = 0; | |
701 | task_context->block_guard_enable = 0; | |
702 | ||
703 | task_context->address_modifier = 0; | |
704 | ||
705 | task_context->task_phase = 0x01; | |
706 | } | |
707 | ||
708 | static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port *sci_port) | |
709 | { | |
710 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
711 | ||
712 | if (sci_port->reserved_tci != SCU_DUMMY_INDEX) | |
713 | scic_controller_free_io_tag(scic, sci_port->reserved_tci); | |
714 | ||
715 | if (sci_port->reserved_rni != SCU_DUMMY_INDEX) | |
716 | scic_sds_remote_node_table_release_remote_node_index(&scic->available_remote_nodes, | |
717 | 1, sci_port->reserved_rni); | |
718 | ||
719 | sci_port->reserved_rni = SCU_DUMMY_INDEX; | |
720 | sci_port->reserved_tci = SCU_DUMMY_INDEX; | |
721 | } | |
722 | ||
723 | /** | |
724 | * This method performs initialization of the supplied port. Initialization | |
725 | * includes: - state machine initialization - member variable initialization | |
726 | * - configuring the phy_mask | |
727 | * @sci_port: | |
728 | * @transport_layer_registers: | |
729 | * @port_task_scheduler_registers: | |
730 | * @port_configuration_regsiter: | |
731 | * | |
732 | * enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned | |
733 | * if the phy being added to the port | |
734 | */ | |
735 | enum sci_status scic_sds_port_initialize( | |
736 | struct scic_sds_port *sci_port, | |
737 | void __iomem *port_task_scheduler_registers, | |
738 | void __iomem *port_configuration_regsiter, | |
739 | void __iomem *viit_registers) | |
740 | { | |
741 | sci_port->port_task_scheduler_registers = port_task_scheduler_registers; | |
742 | sci_port->port_pe_configuration_register = port_configuration_regsiter; | |
743 | sci_port->viit_registers = viit_registers; | |
744 | ||
745 | return SCI_SUCCESS; | |
746 | } | |
747 | ||
748 | /** | |
749 | * scic_port_hard_reset() - perform port hard reset | |
750 | * @port: a handle corresponding to the SAS port to be hard reset. | |
751 | * @reset_timeout: This parameter specifies the number of milliseconds in which | |
752 | * the port reset operation should complete. | |
753 | * | |
754 | * The SCI User callback in scic_user_callbacks_t will only be called once for | |
755 | * each phy in the SAS Port at completion of the hard reset sequence. Return a | |
756 | * status indicating whether the hard reset started successfully. SCI_SUCCESS | |
757 | * This value is returned if the hard reset operation started successfully. | |
758 | */ | |
759 | static enum sci_status scic_port_hard_reset(struct scic_sds_port *port, | |
760 | u32 reset_timeout) | |
761 | { | |
762 | return port->state_handlers->reset_handler( | |
763 | port, reset_timeout); | |
764 | } | |
765 | ||
766 | /** | |
767 | * This method assigns the direct attached device ID for this port. | |
768 | * | |
769 | * @param[in] sci_port The port for which the direct attached device id is to | |
770 | * be assigned. | |
771 | * @param[in] device_id The direct attached device ID to assign to the port. | |
772 | * This will be the RNi for the device | |
773 | */ | |
774 | void scic_sds_port_setup_transports( | |
775 | struct scic_sds_port *sci_port, | |
776 | u32 device_id) | |
777 | { | |
778 | u8 index; | |
779 | ||
780 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
781 | if (sci_port->active_phy_mask & (1 << index)) | |
782 | scic_sds_phy_setup_transport(sci_port->phy_table[index], device_id); | |
6f231dda | 783 | } |
e2f8db50 | 784 | } |
6f231dda | 785 | |
e2f8db50 DW |
786 | /** |
787 | * | |
788 | * @sci_port: This is the port on which the phy should be enabled. | |
789 | * @sci_phy: This is the specific phy which to enable. | |
790 | * @do_notify_user: This parameter specifies whether to inform the user (via | |
791 | * scic_cb_port_link_up()) as to the fact that a new phy as become ready. | |
792 | * | |
793 | * This function will activate the phy in the port. | |
794 | * Activation includes: - adding | |
795 | * the phy to the port - enabling the Protocol Engine in the silicon. - | |
796 | * notifying the user that the link is up. none | |
797 | */ | |
798 | static void scic_sds_port_activate_phy(struct scic_sds_port *sci_port, | |
799 | struct scic_sds_phy *sci_phy, | |
800 | bool do_notify_user) | |
801 | { | |
802 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
803 | struct isci_host *ihost = scic_to_ihost(scic); | |
804 | ||
805 | if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) | |
806 | scic_sds_phy_resume(sci_phy); | |
807 | ||
808 | sci_port->active_phy_mask |= 1 << sci_phy->phy_index; | |
809 | ||
810 | scic_sds_controller_clear_invalid_phy(scic, sci_phy); | |
811 | ||
812 | if (do_notify_user == true) | |
813 | isci_port_link_up(ihost, sci_port, sci_phy); | |
6f231dda | 814 | } |
09d7da13 | 815 | |
e2f8db50 DW |
816 | void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port, |
817 | struct scic_sds_phy *sci_phy, | |
818 | bool do_notify_user) | |
09d7da13 | 819 | { |
e2f8db50 DW |
820 | struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port); |
821 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
822 | struct isci_host *ihost = scic_to_ihost(scic); | |
823 | struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); | |
824 | ||
825 | sci_port->active_phy_mask &= ~(1 << sci_phy->phy_index); | |
826 | ||
827 | sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN; | |
828 | ||
829 | /* Re-assign the phy back to the LP as if it were a narrow port */ | |
830 | writel(sci_phy->phy_index, | |
831 | &sci_port->port_pe_configuration_register[sci_phy->phy_index]); | |
832 | ||
833 | if (do_notify_user == true) | |
834 | isci_port_link_down(ihost, iphy, iport); | |
835 | } | |
836 | ||
837 | /** | |
838 | * | |
839 | * @sci_port: This is the port on which the phy should be disabled. | |
840 | * @sci_phy: This is the specific phy which to disabled. | |
841 | * | |
842 | * This function will disable the phy and report that the phy is not valid for | |
843 | * this port object. None | |
844 | */ | |
845 | static void scic_sds_port_invalid_link_up(struct scic_sds_port *sci_port, | |
846 | struct scic_sds_phy *sci_phy) | |
847 | { | |
848 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
849 | ||
850 | /* | |
851 | * Check to see if we have alreay reported this link as bad and if | |
852 | * not go ahead and tell the SCI_USER that we have discovered an | |
853 | * invalid link. | |
854 | */ | |
855 | if ((scic->invalid_phy_mask & (1 << sci_phy->phy_index)) == 0) { | |
856 | scic_sds_controller_set_invalid_phy(scic, sci_phy); | |
857 | dev_warn(&scic_to_ihost(scic)->pdev->dev, "Invalid link up!\n"); | |
858 | } | |
859 | } | |
860 | ||
e91f41ef PS |
861 | static bool is_port_ready_state(enum scic_sds_port_states state) |
862 | { | |
863 | switch (state) { | |
864 | case SCI_BASE_PORT_STATE_READY: | |
865 | case SCIC_SDS_PORT_READY_SUBSTATE_WAITING: | |
866 | case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL: | |
867 | case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING: | |
868 | return true; | |
869 | default: | |
870 | return false; | |
871 | } | |
872 | } | |
873 | ||
874 | /* flag dummy rnc hanling when exiting a ready state */ | |
875 | static void port_state_machine_change(struct scic_sds_port *sci_port, | |
876 | enum scic_sds_port_states state) | |
877 | { | |
878 | struct sci_base_state_machine *sm = &sci_port->state_machine; | |
879 | enum scic_sds_port_states old_state = sm->current_state_id; | |
880 | ||
881 | if (is_port_ready_state(old_state) && !is_port_ready_state(state)) | |
882 | sci_port->ready_exit = true; | |
883 | ||
884 | sci_base_state_machine_change_state(sm, state); | |
885 | sci_port->ready_exit = false; | |
886 | } | |
887 | ||
e2f8db50 DW |
888 | /** |
889 | * scic_sds_port_general_link_up_handler - phy can be assigned to port? | |
890 | * @sci_port: scic_sds_port object for which has a phy that has gone link up. | |
891 | * @sci_phy: This is the struct scic_sds_phy object that has gone link up. | |
892 | * @do_notify_user: This parameter specifies whether to inform the user (via | |
893 | * scic_cb_port_link_up()) as to the fact that a new phy as become ready. | |
894 | * | |
895 | * Determine if this phy can be assigned to this | |
896 | * port . If the phy is not a valid PHY for | |
897 | * this port then the function will notify the user. A PHY can only be | |
898 | * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in | |
899 | * the same port. none | |
900 | */ | |
901 | static void scic_sds_port_general_link_up_handler(struct scic_sds_port *sci_port, | |
902 | struct scic_sds_phy *sci_phy, | |
903 | bool do_notify_user) | |
904 | { | |
905 | struct sci_sas_address port_sas_address; | |
906 | struct sci_sas_address phy_sas_address; | |
907 | ||
908 | scic_sds_port_get_attached_sas_address(sci_port, &port_sas_address); | |
909 | scic_sds_phy_get_attached_sas_address(sci_phy, &phy_sas_address); | |
910 | ||
911 | /* If the SAS address of the new phy matches the SAS address of | |
912 | * other phys in the port OR this is the first phy in the port, | |
913 | * then activate the phy and allow it to be used for operations | |
914 | * in this port. | |
915 | */ | |
916 | if ((phy_sas_address.high == port_sas_address.high && | |
917 | phy_sas_address.low == port_sas_address.low) || | |
918 | sci_port->active_phy_mask == 0) { | |
919 | struct sci_base_state_machine *sm = &sci_port->state_machine; | |
920 | ||
921 | scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user); | |
922 | if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING) | |
e91f41ef | 923 | port_state_machine_change(sci_port, SCI_BASE_PORT_STATE_READY); |
e2f8db50 DW |
924 | } else |
925 | scic_sds_port_invalid_link_up(sci_port, sci_phy); | |
926 | } | |
927 | ||
928 | ||
929 | ||
930 | /** | |
931 | * This method returns false if the port only has a single phy object assigned. | |
932 | * If there are no phys or more than one phy then the method will return | |
933 | * true. | |
934 | * @sci_port: The port for which the wide port condition is to be checked. | |
935 | * | |
936 | * bool true Is returned if this is a wide ported port. false Is returned if | |
937 | * this is a narrow port. | |
938 | */ | |
939 | static bool scic_sds_port_is_wide(struct scic_sds_port *sci_port) | |
940 | { | |
941 | u32 index; | |
942 | u32 phy_count = 0; | |
943 | ||
944 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
945 | if (sci_port->phy_table[index] != NULL) { | |
946 | phy_count++; | |
947 | } | |
948 | } | |
949 | ||
950 | return phy_count != 1; | |
951 | } | |
952 | ||
953 | /** | |
954 | * This method is called by the PHY object when the link is detected. if the | |
955 | * port wants the PHY to continue on to the link up state then the port | |
956 | * layer must return true. If the port object returns false the phy object | |
957 | * must halt its attempt to go link up. | |
958 | * @sci_port: The port associated with the phy object. | |
959 | * @sci_phy: The phy object that is trying to go link up. | |
960 | * | |
961 | * true if the phy object can continue to the link up condition. true Is | |
962 | * returned if this phy can continue to the ready state. false Is returned if | |
963 | * can not continue on to the ready state. This notification is in place for | |
964 | * wide ports and direct attached phys. Since there are no wide ported SATA | |
965 | * devices this could become an invalid port configuration. | |
966 | */ | |
967 | bool scic_sds_port_link_detected( | |
968 | struct scic_sds_port *sci_port, | |
969 | struct scic_sds_phy *sci_phy) | |
970 | { | |
971 | if ((sci_port->logical_port_index != SCIC_SDS_DUMMY_PORT) && | |
972 | (sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) && | |
973 | scic_sds_port_is_wide(sci_port)) { | |
974 | scic_sds_port_invalid_link_up(sci_port, sci_phy); | |
975 | ||
976 | return false; | |
977 | } | |
978 | ||
979 | return true; | |
980 | } | |
981 | ||
982 | /** | |
983 | * This method is the entry point for the phy to inform the port that it is now | |
984 | * in a ready state | |
985 | * @sci_port: | |
986 | * | |
987 | * | |
988 | */ | |
989 | void scic_sds_port_link_up( | |
990 | struct scic_sds_port *sci_port, | |
991 | struct scic_sds_phy *sci_phy) | |
992 | { | |
993 | sci_phy->is_in_link_training = false; | |
994 | ||
995 | sci_port->state_handlers->link_up_handler(sci_port, sci_phy); | |
996 | } | |
997 | ||
998 | /** | |
999 | * This method is the entry point for the phy to inform the port that it is no | |
1000 | * longer in a ready state | |
1001 | * @sci_port: | |
1002 | * | |
1003 | * | |
1004 | */ | |
1005 | void scic_sds_port_link_down( | |
1006 | struct scic_sds_port *sci_port, | |
1007 | struct scic_sds_phy *sci_phy) | |
1008 | { | |
1009 | sci_port->state_handlers->link_down_handler(sci_port, sci_phy); | |
1010 | } | |
1011 | ||
1012 | /** | |
1013 | * This method is called to start an IO request on this port. | |
1014 | * @sci_port: | |
1015 | * @sci_dev: | |
1016 | * @sci_req: | |
1017 | * | |
1018 | * enum sci_status | |
1019 | */ | |
1020 | enum sci_status scic_sds_port_start_io( | |
1021 | struct scic_sds_port *sci_port, | |
1022 | struct scic_sds_remote_device *sci_dev, | |
1023 | struct scic_sds_request *sci_req) | |
1024 | { | |
1025 | return sci_port->state_handlers->start_io_handler( | |
1026 | sci_port, sci_dev, sci_req); | |
1027 | } | |
1028 | ||
1029 | /** | |
1030 | * This method is called to complete an IO request to the port. | |
1031 | * @sci_port: | |
1032 | * @sci_dev: | |
1033 | * @sci_req: | |
1034 | * | |
1035 | * enum sci_status | |
1036 | */ | |
1037 | enum sci_status scic_sds_port_complete_io( | |
1038 | struct scic_sds_port *sci_port, | |
1039 | struct scic_sds_remote_device *sci_dev, | |
1040 | struct scic_sds_request *sci_req) | |
1041 | { | |
1042 | return sci_port->state_handlers->complete_io_handler( | |
1043 | sci_port, sci_dev, sci_req); | |
1044 | } | |
1045 | ||
1046 | /** | |
1047 | * This method is provided to timeout requests for port operations. Mostly its | |
1048 | * for the port reset operation. | |
1049 | * | |
1050 | * | |
1051 | */ | |
1052 | static void scic_sds_port_timeout_handler(void *port) | |
1053 | { | |
1054 | struct scic_sds_port *sci_port = port; | |
1055 | u32 current_state; | |
1056 | ||
e91f41ef | 1057 | current_state = sci_base_state_machine_get_state(&sci_port->state_machine); |
e2f8db50 DW |
1058 | |
1059 | if (current_state == SCI_BASE_PORT_STATE_RESETTING) { | |
e91f41ef PS |
1060 | /* if the port is still in the resetting state then the timeout |
1061 | * fired before the reset completed. | |
e2f8db50 | 1062 | */ |
e91f41ef | 1063 | port_state_machine_change(sci_port, SCI_BASE_PORT_STATE_FAILED); |
e2f8db50 | 1064 | } else if (current_state == SCI_BASE_PORT_STATE_STOPPED) { |
e91f41ef PS |
1065 | /* if the port is stopped then the start request failed In this |
1066 | * case stay in the stopped state. | |
e2f8db50 DW |
1067 | */ |
1068 | dev_err(sciport_to_dev(sci_port), | |
1069 | "%s: SCIC Port 0x%p failed to stop before tiemout.\n", | |
1070 | __func__, | |
1071 | sci_port); | |
1072 | } else if (current_state == SCI_BASE_PORT_STATE_STOPPING) { | |
e91f41ef PS |
1073 | /* if the port is still stopping then the stop has not completed */ |
1074 | isci_port_stop_complete(sci_port->owning_controller, | |
1075 | sci_port, | |
1076 | SCI_FAILURE_TIMEOUT); | |
e2f8db50 | 1077 | } else { |
e91f41ef | 1078 | /* The port is in the ready state and we have a timer |
e2f8db50 DW |
1079 | * reporting a timeout this should not happen. |
1080 | */ | |
1081 | dev_err(sciport_to_dev(sci_port), | |
1082 | "%s: SCIC Port 0x%p is processing a timeout operation " | |
e91f41ef | 1083 | "in state %d.\n", __func__, sci_port, current_state); |
e2f8db50 DW |
1084 | } |
1085 | } | |
1086 | ||
1087 | /* --------------------------------------------------------------------------- */ | |
1088 | ||
1089 | /** | |
1090 | * This function updates the hardwares VIIT entry for this port. | |
1091 | * | |
1092 | * | |
1093 | */ | |
1094 | static void scic_sds_port_update_viit_entry(struct scic_sds_port *sci_port) | |
1095 | { | |
1096 | struct sci_sas_address sas_address; | |
1097 | ||
1098 | scic_sds_port_get_sas_address(sci_port, &sas_address); | |
1099 | ||
1100 | writel(sas_address.high, | |
1101 | &sci_port->viit_registers->initiator_sas_address_hi); | |
1102 | writel(sas_address.low, | |
1103 | &sci_port->viit_registers->initiator_sas_address_lo); | |
1104 | ||
1105 | /* This value get cleared just in case its not already cleared */ | |
1106 | writel(0, &sci_port->viit_registers->reserved); | |
1107 | ||
1108 | /* We are required to update the status register last */ | |
1109 | writel(SCU_VIIT_ENTRY_ID_VIIT | | |
1110 | SCU_VIIT_IPPT_INITIATOR | | |
1111 | ((1 << sci_port->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) | | |
1112 | SCU_VIIT_STATUS_ALL_VALID, | |
1113 | &sci_port->viit_registers->status); | |
1114 | } | |
1115 | ||
1116 | /** | |
1117 | * This method returns the maximum allowed speed for data transfers on this | |
1118 | * port. This maximum allowed speed evaluates to the maximum speed of the | |
1119 | * slowest phy in the port. | |
1120 | * @sci_port: This parameter specifies the port for which to retrieve the | |
1121 | * maximum allowed speed. | |
1122 | * | |
1123 | * This method returns the maximum negotiated speed of the slowest phy in the | |
1124 | * port. | |
1125 | */ | |
1126 | enum sas_linkrate scic_sds_port_get_max_allowed_speed( | |
1127 | struct scic_sds_port *sci_port) | |
1128 | { | |
1129 | u16 index; | |
1130 | enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS; | |
1131 | struct scic_sds_phy *phy = NULL; | |
1132 | ||
1133 | /* | |
1134 | * Loop through all of the phys in this port and find the phy with the | |
1135 | * lowest maximum link rate. */ | |
1136 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
1137 | phy = sci_port->phy_table[index]; | |
1138 | if ( | |
1139 | (phy != NULL) | |
1140 | && (scic_sds_port_active_phy(sci_port, phy) == true) | |
1141 | && (phy->max_negotiated_speed < max_allowed_speed) | |
1142 | ) | |
1143 | max_allowed_speed = phy->max_negotiated_speed; | |
1144 | } | |
1145 | ||
1146 | return max_allowed_speed; | |
1147 | } | |
1148 | ||
1149 | static void scic_port_enable_broadcast_change_notification(struct scic_sds_port *port) | |
1150 | { | |
1151 | struct scic_sds_phy *phy; | |
1152 | u32 register_value; | |
1153 | u8 index; | |
1154 | ||
1155 | /* Loop through all of the phys to enable BCN. */ | |
1156 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
1157 | phy = port->phy_table[index]; | |
1158 | if (phy != NULL) { | |
1159 | register_value = | |
1160 | readl(&phy->link_layer_registers->link_layer_control); | |
1161 | ||
1162 | /* clear the bit by writing 1. */ | |
1163 | writel(register_value, | |
1164 | &phy->link_layer_registers->link_layer_control); | |
1165 | } | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | * **************************************************************************** | |
1171 | * * READY SUBSTATE HANDLERS | |
1172 | * **************************************************************************** */ | |
1173 | ||
e2f8db50 DW |
1174 | /* |
1175 | * This method is the general ready substate complete io handler for the | |
1176 | * struct scic_sds_port object. This function decrments the outstanding request count | |
1177 | * for this port object. enum sci_status SCI_SUCCESS | |
1178 | */ | |
1179 | static enum sci_status scic_sds_port_ready_substate_complete_io_handler( | |
1180 | struct scic_sds_port *port, | |
1181 | struct scic_sds_remote_device *device, | |
1182 | struct scic_sds_request *io_request) | |
1183 | { | |
1184 | scic_sds_port_decrement_request_count(port); | |
1185 | ||
1186 | return SCI_SUCCESS; | |
1187 | } | |
1188 | ||
e91f41ef PS |
1189 | static enum sci_status scic_sds_port_ready_substate_add_phy_handler(struct scic_sds_port *sci_port, |
1190 | struct scic_sds_phy *sci_phy) | |
e2f8db50 DW |
1191 | { |
1192 | enum sci_status status; | |
1193 | ||
e91f41ef | 1194 | status = scic_sds_port_set_phy(sci_port, sci_phy); |
e2f8db50 | 1195 | |
e91f41ef PS |
1196 | if (status != SCI_SUCCESS) |
1197 | return status; | |
e2f8db50 | 1198 | |
e91f41ef PS |
1199 | scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); |
1200 | sci_port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; | |
1201 | port_state_machine_change(sci_port, SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); | |
e2f8db50 DW |
1202 | |
1203 | return status; | |
1204 | } | |
1205 | ||
1206 | ||
e91f41ef PS |
1207 | static enum sci_status scic_sds_port_ready_substate_remove_phy_handler(struct scic_sds_port *port, |
1208 | struct scic_sds_phy *phy) | |
e2f8db50 DW |
1209 | { |
1210 | enum sci_status status; | |
1211 | ||
1212 | status = scic_sds_port_clear_phy(port, phy); | |
1213 | ||
e91f41ef PS |
1214 | if (status != SCI_SUCCESS) |
1215 | return status; | |
e2f8db50 | 1216 | |
e91f41ef | 1217 | scic_sds_port_deactivate_phy(port, phy, true); |
e2f8db50 | 1218 | |
e91f41ef | 1219 | port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; |
e2f8db50 | 1220 | |
e91f41ef PS |
1221 | port_state_machine_change(port, |
1222 | SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); | |
e2f8db50 DW |
1223 | return status; |
1224 | } | |
1225 | ||
1226 | /* | |
1227 | * **************************************************************************** | |
1228 | * * READY SUBSTATE WAITING HANDLERS | |
1229 | * **************************************************************************** */ | |
1230 | ||
1231 | /** | |
1232 | * | |
1233 | * @sci_port: This is the struct scic_sds_port object that which has a phy that has | |
1234 | * gone link up. | |
1235 | * @sci_phy: This is the struct scic_sds_phy object that has gone link up. | |
1236 | * | |
1237 | * This method is the ready waiting substate link up handler for the | |
1238 | * struct scic_sds_port object. This methos will report the link up condition for | |
1239 | * this port and will transition to the ready operational substate. none | |
1240 | */ | |
1241 | static void scic_sds_port_ready_waiting_substate_link_up_handler( | |
1242 | struct scic_sds_port *sci_port, | |
1243 | struct scic_sds_phy *sci_phy) | |
1244 | { | |
1245 | /* | |
1246 | * Since this is the first phy going link up for the port we can just enable | |
1247 | * it and continue. */ | |
1248 | scic_sds_port_activate_phy(sci_port, sci_phy, true); | |
1249 | ||
e91f41ef PS |
1250 | port_state_machine_change(sci_port, |
1251 | SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); | |
e2f8db50 DW |
1252 | } |
1253 | ||
1254 | /* | |
1255 | * This method is the ready waiting substate start io handler for the | |
1256 | * struct scic_sds_port object. The port object can not accept new requests so the | |
1257 | * request is failed. enum sci_status SCI_FAILURE_INVALID_STATE | |
1258 | */ | |
1259 | static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler( | |
1260 | struct scic_sds_port *port, | |
1261 | struct scic_sds_remote_device *device, | |
1262 | struct scic_sds_request *io_request) | |
1263 | { | |
1264 | return SCI_FAILURE_INVALID_STATE; | |
1265 | } | |
1266 | ||
1267 | /* | |
1268 | * **************************************************************************** | |
1269 | * * READY SUBSTATE OPERATIONAL HANDLERS | |
1270 | * **************************************************************************** */ | |
1271 | ||
1272 | /* | |
1273 | * This method will casue the port to reset. enum sci_status SCI_SUCCESS | |
1274 | */ | |
1275 | static enum | |
1276 | sci_status scic_sds_port_ready_operational_substate_reset_handler( | |
1277 | struct scic_sds_port *port, | |
1278 | u32 timeout) | |
1279 | { | |
1280 | enum sci_status status = SCI_FAILURE_INVALID_PHY; | |
1281 | u32 phy_index; | |
1282 | struct scic_sds_phy *selected_phy = NULL; | |
1283 | ||
1284 | ||
1285 | /* Select a phy on which we can send the hard reset request. */ | |
1286 | for (phy_index = 0; | |
1287 | (phy_index < SCI_MAX_PHYS) && (selected_phy == NULL); | |
1288 | phy_index++) { | |
1289 | selected_phy = port->phy_table[phy_index]; | |
1290 | ||
1291 | if ((selected_phy != NULL) && | |
1292 | !scic_sds_port_active_phy(port, selected_phy)) { | |
1293 | /* | |
1294 | * We found a phy but it is not ready select | |
1295 | * different phy | |
1296 | */ | |
1297 | selected_phy = NULL; | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | /* If we have a phy then go ahead and start the reset procedure */ | |
1302 | if (selected_phy != NULL) { | |
1303 | status = scic_sds_phy_reset(selected_phy); | |
1304 | ||
1305 | if (status == SCI_SUCCESS) { | |
1306 | isci_timer_start(port->timer_handle, timeout); | |
1307 | port->not_ready_reason = | |
1308 | SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED; | |
1309 | ||
e91f41ef PS |
1310 | port_state_machine_change(port, |
1311 | SCI_BASE_PORT_STATE_RESETTING); | |
e2f8db50 DW |
1312 | } |
1313 | } | |
1314 | ||
1315 | return status; | |
1316 | } | |
1317 | ||
1318 | /** | |
1319 | * scic_sds_port_ready_operational_substate_link_up_handler() - | |
1320 | * @sci_port: This is the struct scic_sds_port object that which has a phy that has | |
1321 | * gone link up. | |
1322 | * @sci_phy: This is the struct scic_sds_phy object that has gone link up. | |
1323 | * | |
1324 | * This method is the ready operational substate link up handler for the | |
1325 | * struct scic_sds_port object. This function notifies the SCI User that the phy has | |
1326 | * gone link up. none | |
1327 | */ | |
1328 | static void scic_sds_port_ready_operational_substate_link_up_handler( | |
1329 | struct scic_sds_port *sci_port, | |
1330 | struct scic_sds_phy *sci_phy) | |
1331 | { | |
1332 | scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); | |
1333 | } | |
1334 | ||
1335 | /** | |
1336 | * scic_sds_port_ready_operational_substate_link_down_handler() - | |
1337 | * @sci_port: This is the struct scic_sds_port object that which has a phy that has | |
1338 | * gone link down. | |
1339 | * @sci_phy: This is the struct scic_sds_phy object that has gone link down. | |
1340 | * | |
1341 | * This method is the ready operational substate link down handler for the | |
1342 | * struct scic_sds_port object. This function notifies the SCI User that the phy has | |
1343 | * gone link down and if this is the last phy in the port the port will change | |
1344 | * state to the ready waiting substate. none | |
1345 | */ | |
1346 | static void scic_sds_port_ready_operational_substate_link_down_handler( | |
1347 | struct scic_sds_port *sci_port, | |
1348 | struct scic_sds_phy *sci_phy) | |
1349 | { | |
1350 | scic_sds_port_deactivate_phy(sci_port, sci_phy, true); | |
1351 | ||
1352 | /* | |
1353 | * If there are no active phys left in the port, then transition | |
1354 | * the port to the WAITING state until such time as a phy goes | |
1355 | * link up. */ | |
1356 | if (sci_port->active_phy_mask == 0) | |
e91f41ef PS |
1357 | port_state_machine_change(sci_port, |
1358 | SCIC_SDS_PORT_READY_SUBSTATE_WAITING); | |
e2f8db50 DW |
1359 | } |
1360 | ||
1361 | /* | |
1362 | * This method is the ready operational substate start io handler for the | |
1363 | * struct scic_sds_port object. This function incremetns the outstanding request | |
1364 | * count for this port object. enum sci_status SCI_SUCCESS | |
1365 | */ | |
1366 | static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler( | |
1367 | struct scic_sds_port *port, | |
1368 | struct scic_sds_remote_device *device, | |
1369 | struct scic_sds_request *io_request) | |
1370 | { | |
1371 | port->started_request_count++; | |
1372 | return SCI_SUCCESS; | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | * **************************************************************************** | |
1377 | * * READY SUBSTATE OPERATIONAL HANDLERS | |
1378 | * **************************************************************************** */ | |
1379 | ||
1380 | /* | |
1381 | * This is the default method for a port add phy request. It will report a | |
1382 | * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE | |
1383 | */ | |
1384 | static enum sci_status scic_sds_port_ready_configuring_substate_add_phy_handler( | |
1385 | struct scic_sds_port *port, | |
1386 | struct scic_sds_phy *phy) | |
1387 | { | |
1388 | enum sci_status status; | |
1389 | ||
1390 | status = scic_sds_port_set_phy(port, phy); | |
1391 | ||
1392 | if (status == SCI_SUCCESS) { | |
1393 | scic_sds_port_general_link_up_handler(port, phy, true); | |
1394 | ||
1395 | /* | |
1396 | * Re-enter the configuring state since this may be the last phy in | |
1397 | * the port. */ | |
e91f41ef PS |
1398 | port_state_machine_change(port, |
1399 | SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); | |
e2f8db50 DW |
1400 | } |
1401 | ||
1402 | return status; | |
1403 | } | |
1404 | ||
1405 | /* | |
1406 | * This is the default method for a port remove phy request. It will report a | |
1407 | * warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE | |
1408 | */ | |
1409 | static enum sci_status scic_sds_port_ready_configuring_substate_remove_phy_handler( | |
1410 | struct scic_sds_port *port, | |
1411 | struct scic_sds_phy *phy) | |
1412 | { | |
1413 | enum sci_status status; | |
1414 | ||
1415 | status = scic_sds_port_clear_phy(port, phy); | |
1416 | ||
e91f41ef PS |
1417 | if (status != SCI_SUCCESS) |
1418 | return status; | |
1419 | scic_sds_port_deactivate_phy(port, phy, true); | |
e2f8db50 | 1420 | |
e91f41ef PS |
1421 | /* Re-enter the configuring state since this may be the last phy in |
1422 | * the port | |
1423 | */ | |
1424 | port_state_machine_change(port, | |
1425 | SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); | |
e2f8db50 DW |
1426 | |
1427 | return status; | |
1428 | } | |
1429 | ||
1430 | /** | |
1431 | * scic_sds_port_ready_configuring_substate_complete_io_handler() - | |
1432 | * @port: This is the port that is being requested to complete the io request. | |
1433 | * @device: This is the device on which the io is completing. | |
1434 | * | |
1435 | * This method will decrement the outstanding request count for this port. If | |
1436 | * the request count goes to 0 then the port can be reprogrammed with its new | |
1437 | * phy data. | |
1438 | */ | |
1439 | static enum sci_status | |
1440 | scic_sds_port_ready_configuring_substate_complete_io_handler( | |
1441 | struct scic_sds_port *port, | |
1442 | struct scic_sds_remote_device *device, | |
1443 | struct scic_sds_request *io_request) | |
1444 | { | |
1445 | scic_sds_port_decrement_request_count(port); | |
1446 | ||
1447 | if (port->started_request_count == 0) { | |
e91f41ef PS |
1448 | port_state_machine_change(port, |
1449 | SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); | |
e2f8db50 DW |
1450 | } |
1451 | ||
1452 | return SCI_SUCCESS; | |
1453 | } | |
1454 | ||
1455 | static enum sci_status default_port_handler(struct scic_sds_port *sci_port, | |
1456 | const char *func) | |
1457 | { | |
1458 | dev_warn(sciport_to_dev(sci_port), | |
1459 | "%s: in wrong state: %d\n", func, | |
1460 | sci_base_state_machine_get_state(&sci_port->state_machine)); | |
1461 | return SCI_FAILURE_INVALID_STATE; | |
1462 | } | |
1463 | ||
e2f8db50 DW |
1464 | static enum sci_status |
1465 | scic_sds_port_default_reset_handler(struct scic_sds_port *sci_port, | |
1466 | u32 timeout) | |
1467 | { | |
1468 | return default_port_handler(sci_port, __func__); | |
1469 | } | |
1470 | ||
1471 | static enum sci_status | |
1472 | scic_sds_port_default_add_phy_handler(struct scic_sds_port *sci_port, | |
1473 | struct scic_sds_phy *base_phy) | |
1474 | { | |
1475 | return default_port_handler(sci_port, __func__); | |
1476 | } | |
1477 | ||
1478 | static enum sci_status | |
1479 | scic_sds_port_default_remove_phy_handler(struct scic_sds_port *sci_port, | |
1480 | struct scic_sds_phy *base_phy) | |
1481 | { | |
1482 | return default_port_handler(sci_port, __func__); | |
1483 | } | |
1484 | ||
1485 | /* | |
1486 | * This is the default method for a port unsolicited frame request. It will | |
1487 | * report a warning and exit. enum sci_status SCI_FAILURE_INVALID_STATE Is it even | |
1488 | * possible to receive an unsolicited frame directed to a port object? It | |
1489 | * seems possible if we implementing virtual functions but until then? | |
1490 | */ | |
1491 | static enum sci_status | |
1492 | scic_sds_port_default_frame_handler(struct scic_sds_port *sci_port, | |
1493 | u32 frame_index) | |
1494 | { | |
1495 | struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port); | |
1496 | ||
1497 | default_port_handler(sci_port, __func__); | |
1498 | scic_sds_controller_release_frame(scic, frame_index); | |
1499 | ||
1500 | return SCI_FAILURE_INVALID_STATE; | |
1501 | } | |
1502 | ||
1503 | static enum sci_status scic_sds_port_default_event_handler(struct scic_sds_port *sci_port, | |
1504 | u32 event_code) | |
1505 | { | |
1506 | return default_port_handler(sci_port, __func__); | |
1507 | } | |
1508 | ||
1509 | static void scic_sds_port_default_link_up_handler(struct scic_sds_port *sci_port, | |
1510 | struct scic_sds_phy *sci_phy) | |
1511 | { | |
1512 | default_port_handler(sci_port, __func__); | |
1513 | } | |
1514 | ||
1515 | static void scic_sds_port_default_link_down_handler(struct scic_sds_port *sci_port, | |
1516 | struct scic_sds_phy *sci_phy) | |
1517 | { | |
1518 | default_port_handler(sci_port, __func__); | |
1519 | } | |
1520 | ||
1521 | static enum sci_status scic_sds_port_default_start_io_handler(struct scic_sds_port *sci_port, | |
1522 | struct scic_sds_remote_device *sci_dev, | |
1523 | struct scic_sds_request *sci_req) | |
1524 | { | |
1525 | return default_port_handler(sci_port, __func__); | |
1526 | } | |
1527 | ||
1528 | static enum sci_status scic_sds_port_default_complete_io_handler(struct scic_sds_port *sci_port, | |
1529 | struct scic_sds_remote_device *sci_dev, | |
1530 | struct scic_sds_request *sci_req) | |
1531 | { | |
1532 | return default_port_handler(sci_port, __func__); | |
1533 | } | |
1534 | ||
e2f8db50 DW |
1535 | /* |
1536 | * ****************************************************************************** | |
1537 | * * PORT STATE PRIVATE METHODS | |
1538 | * ****************************************************************************** */ | |
1539 | ||
1540 | /** | |
1541 | * | |
1542 | * @sci_port: This is the struct scic_sds_port object to suspend. | |
1543 | * | |
1544 | * This method will susped the port task scheduler for this port object. none | |
1545 | */ | |
1546 | static void | |
1547 | scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port *port) | |
1548 | { | |
1549 | u32 pts_control_value; | |
1550 | ||
1551 | pts_control_value = readl(&port->port_task_scheduler_registers->control); | |
1552 | pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND); | |
1553 | writel(pts_control_value, &port->port_task_scheduler_registers->control); | |
1554 | } | |
1555 | ||
1556 | /** | |
1557 | * scic_sds_port_post_dummy_request() - post dummy/workaround request | |
1558 | * @sci_port: port to post task | |
1559 | * | |
1560 | * Prevent the hardware scheduler from posting new requests to the front | |
1561 | * of the scheduler queue causing a starvation problem for currently | |
1562 | * ongoing requests. | |
1563 | * | |
1564 | */ | |
1565 | static void scic_sds_port_post_dummy_request(struct scic_sds_port *sci_port) | |
1566 | { | |
1567 | u32 command; | |
1568 | struct scu_task_context *task_context; | |
1569 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1570 | u16 tci = sci_port->reserved_tci; | |
1571 | ||
1572 | task_context = scic_sds_controller_get_task_context_buffer(scic, tci); | |
1573 | ||
1574 | task_context->abort = 0; | |
1575 | ||
1576 | command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | | |
1577 | sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | | |
1578 | tci; | |
1579 | ||
1580 | scic_sds_controller_post_request(scic, command); | |
1581 | } | |
1582 | ||
1583 | /** | |
1584 | * This routine will abort the dummy request. This will alow the hardware to | |
1585 | * power down parts of the silicon to save power. | |
1586 | * | |
1587 | * @sci_port: The port on which the task must be aborted. | |
1588 | * | |
1589 | */ | |
1590 | static void scic_sds_port_abort_dummy_request(struct scic_sds_port *sci_port) | |
1591 | { | |
1592 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1593 | u16 tci = sci_port->reserved_tci; | |
1594 | struct scu_task_context *tc; | |
1595 | u32 command; | |
1596 | ||
1597 | tc = scic_sds_controller_get_task_context_buffer(scic, tci); | |
1598 | ||
1599 | tc->abort = 1; | |
1600 | ||
1601 | command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT | | |
1602 | sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | | |
1603 | tci; | |
1604 | ||
1605 | scic_sds_controller_post_request(scic, command); | |
1606 | } | |
1607 | ||
1608 | /** | |
1609 | * | |
1610 | * @sci_port: This is the struct scic_sds_port object to resume. | |
1611 | * | |
1612 | * This method will resume the port task scheduler for this port object. none | |
1613 | */ | |
1614 | static void | |
1615 | scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port) | |
1616 | { | |
1617 | u32 pts_control_value; | |
1618 | ||
1619 | pts_control_value = readl(&port->port_task_scheduler_registers->control); | |
1620 | pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND); | |
1621 | writel(pts_control_value, &port->port_task_scheduler_registers->control); | |
1622 | } | |
1623 | ||
1624 | /* | |
1625 | * ****************************************************************************** | |
1626 | * * PORT READY SUBSTATE METHODS | |
1627 | * ****************************************************************************** */ | |
1628 | ||
1629 | /** | |
1630 | * | |
1631 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
1632 | * | |
1633 | * This method will perform the actions required by the struct scic_sds_port on | |
1634 | * entering the SCIC_SDS_PORT_READY_SUBSTATE_WAITING. This function checks the | |
1635 | * port for any ready phys. If there is at least one phy in a ready state then | |
1636 | * the port transitions to the ready operational substate. none | |
1637 | */ | |
1638 | static void scic_sds_port_ready_substate_waiting_enter(void *object) | |
1639 | { | |
1640 | struct scic_sds_port *sci_port = object; | |
1641 | ||
e91f41ef | 1642 | scic_sds_port_set_base_state_handlers( |
e2f8db50 DW |
1643 | sci_port, SCIC_SDS_PORT_READY_SUBSTATE_WAITING |
1644 | ); | |
1645 | ||
1646 | scic_sds_port_suspend_port_task_scheduler(sci_port); | |
1647 | ||
1648 | sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS; | |
1649 | ||
1650 | if (sci_port->active_phy_mask != 0) { | |
1651 | /* At least one of the phys on the port is ready */ | |
e91f41ef PS |
1652 | port_state_machine_change(sci_port, |
1653 | SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); | |
e2f8db50 DW |
1654 | } |
1655 | } | |
1656 | ||
1657 | /** | |
1658 | * | |
1659 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
1660 | * | |
1661 | * This function will perform the actions required by the struct scic_sds_port | |
1662 | * on entering the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function sets | |
1663 | * the state handlers for the port object, notifies the SCI User that the port | |
1664 | * is ready, and resumes port operations. none | |
1665 | */ | |
1666 | static void scic_sds_port_ready_substate_operational_enter(void *object) | |
1667 | { | |
1668 | u32 index; | |
1669 | struct scic_sds_port *sci_port = object; | |
1670 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1671 | struct isci_host *ihost = scic_to_ihost(scic); | |
1672 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
1673 | ||
e91f41ef | 1674 | scic_sds_port_set_base_state_handlers( |
e2f8db50 DW |
1675 | sci_port, |
1676 | SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); | |
1677 | ||
1678 | isci_port_ready(ihost, iport); | |
1679 | ||
1680 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
1681 | if (sci_port->phy_table[index]) { | |
1682 | writel(sci_port->physical_port_index, | |
1683 | &sci_port->port_pe_configuration_register[ | |
1684 | sci_port->phy_table[index]->phy_index]); | |
1685 | } | |
1686 | } | |
1687 | ||
1688 | scic_sds_port_update_viit_entry(sci_port); | |
1689 | ||
1690 | scic_sds_port_resume_port_task_scheduler(sci_port); | |
1691 | ||
1692 | /* | |
1693 | * Post the dummy task for the port so the hardware can schedule | |
1694 | * io correctly | |
1695 | */ | |
1696 | scic_sds_port_post_dummy_request(sci_port); | |
1697 | } | |
1698 | ||
e91f41ef PS |
1699 | static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port) |
1700 | { | |
1701 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1702 | u8 phys_index = sci_port->physical_port_index; | |
1703 | union scu_remote_node_context *rnc; | |
1704 | u16 rni = sci_port->reserved_rni; | |
1705 | u32 command; | |
1706 | ||
1707 | rnc = &scic->remote_node_context_table[rni]; | |
1708 | ||
1709 | rnc->ssp.is_valid = false; | |
1710 | ||
1711 | /* ensure the preceding tc abort request has reached the | |
1712 | * controller and give it ample time to act before posting the rnc | |
1713 | * invalidate | |
1714 | */ | |
1715 | readl(&scic->smu_registers->interrupt_status); /* flush */ | |
1716 | udelay(10); | |
1717 | ||
1718 | command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE | | |
1719 | phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; | |
1720 | ||
1721 | scic_sds_controller_post_request(scic, command); | |
1722 | } | |
1723 | ||
e2f8db50 DW |
1724 | /** |
1725 | * | |
1726 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
1727 | * | |
1728 | * This method will perform the actions required by the struct scic_sds_port on | |
1729 | * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports | |
1730 | * the port not ready and suspends the port task scheduler. none | |
1731 | */ | |
1732 | static void scic_sds_port_ready_substate_operational_exit(void *object) | |
1733 | { | |
1734 | struct scic_sds_port *sci_port = object; | |
1735 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1736 | struct isci_host *ihost = scic_to_ihost(scic); | |
1737 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
1738 | ||
1739 | /* | |
1740 | * Kill the dummy task for this port if it has not yet posted | |
1741 | * the hardware will treat this as a NOP and just return abort | |
1742 | * complete. | |
1743 | */ | |
1744 | scic_sds_port_abort_dummy_request(sci_port); | |
1745 | ||
1746 | isci_port_not_ready(ihost, iport); | |
e91f41ef PS |
1747 | |
1748 | if (sci_port->ready_exit) | |
1749 | scic_sds_port_invalidate_dummy_remote_node(sci_port); | |
e2f8db50 DW |
1750 | } |
1751 | ||
1752 | /* | |
1753 | * ****************************************************************************** | |
1754 | * * PORT READY CONFIGURING METHODS | |
1755 | * ****************************************************************************** */ | |
1756 | ||
1757 | /** | |
1758 | * scic_sds_port_ready_substate_configuring_enter() - | |
1759 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
1760 | * | |
1761 | * This method will perform the actions required by the struct scic_sds_port on | |
1762 | * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports | |
1763 | * the port not ready and suspends the port task scheduler. none | |
1764 | */ | |
1765 | static void scic_sds_port_ready_substate_configuring_enter(void *object) | |
1766 | { | |
1767 | struct scic_sds_port *sci_port = object; | |
1768 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1769 | struct isci_host *ihost = scic_to_ihost(scic); | |
1770 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
1771 | ||
e91f41ef | 1772 | scic_sds_port_set_base_state_handlers( |
e2f8db50 DW |
1773 | sci_port, |
1774 | SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); | |
1775 | ||
1776 | if (sci_port->active_phy_mask == 0) { | |
1777 | isci_port_not_ready(ihost, iport); | |
1778 | ||
e91f41ef PS |
1779 | port_state_machine_change(sci_port, |
1780 | SCIC_SDS_PORT_READY_SUBSTATE_WAITING); | |
e2f8db50 | 1781 | } else if (sci_port->started_request_count == 0) |
e91f41ef PS |
1782 | port_state_machine_change(sci_port, |
1783 | SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); | |
e2f8db50 DW |
1784 | } |
1785 | ||
1786 | static void scic_sds_port_ready_substate_configuring_exit(void *object) | |
1787 | { | |
1788 | struct scic_sds_port *sci_port = object; | |
1789 | ||
1790 | scic_sds_port_suspend_port_task_scheduler(sci_port); | |
e91f41ef PS |
1791 | if (sci_port->ready_exit) |
1792 | scic_sds_port_invalidate_dummy_remote_node(sci_port); | |
e2f8db50 DW |
1793 | } |
1794 | ||
1795 | /* --------------------------------------------------------------------------- */ | |
1796 | ||
e2f8db50 DW |
1797 | /** |
1798 | * | |
1799 | * @port: This is the struct scic_sds_port object on which the io request count will | |
1800 | * be decremented. | |
1801 | * @device: This is the struct scic_sds_remote_device object to which the io request | |
1802 | * is being directed. This parameter is not required to complete this | |
1803 | * operation. | |
1804 | * @io_request: This is the request that is being completed on this port | |
1805 | * object. This parameter is not required to complete this operation. | |
1806 | * | |
1807 | * This is a general complete io request handler for the struct scic_sds_port object. | |
1808 | * enum sci_status SCI_SUCCESS | |
1809 | */ | |
1810 | static enum sci_status scic_sds_port_general_complete_io_handler( | |
1811 | struct scic_sds_port *port, | |
1812 | struct scic_sds_remote_device *device, | |
1813 | struct scic_sds_request *io_request) | |
1814 | { | |
1815 | scic_sds_port_decrement_request_count(port); | |
1816 | ||
1817 | return SCI_SUCCESS; | |
1818 | } | |
1819 | ||
e2f8db50 DW |
1820 | /* |
1821 | * This method takes the struct scic_sds_port that is in a stopped state and handles | |
1822 | * the add phy request. In MPC mode the only time a phy can be added to a port | |
1823 | * is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status | |
1824 | * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not | |
1825 | * be added to the port. SCI_SUCCESS if the phy is added to the port. | |
1826 | */ | |
1827 | static enum sci_status scic_sds_port_stopped_state_add_phy_handler( | |
1828 | struct scic_sds_port *port, | |
1829 | struct scic_sds_phy *phy) | |
1830 | { | |
1831 | struct sci_sas_address port_sas_address; | |
1832 | ||
1833 | /* Read the port assigned SAS Address if there is one */ | |
1834 | scic_sds_port_get_sas_address(port, &port_sas_address); | |
1835 | ||
1836 | if (port_sas_address.high != 0 && port_sas_address.low != 0) { | |
1837 | struct sci_sas_address phy_sas_address; | |
1838 | ||
1839 | /* | |
1840 | * Make sure that the PHY SAS Address matches the SAS Address | |
1841 | * for this port. */ | |
1842 | scic_sds_phy_get_sas_address(phy, &phy_sas_address); | |
1843 | ||
1844 | if ( | |
1845 | (port_sas_address.high != phy_sas_address.high) | |
1846 | || (port_sas_address.low != phy_sas_address.low) | |
1847 | ) { | |
1848 | return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | return scic_sds_port_set_phy(port, phy); | |
1853 | } | |
1854 | ||
1855 | /* | |
1856 | * This method takes the struct scic_sds_port that is in a stopped state and handles | |
1857 | * the remove phy request. In MPC mode the only time a phy can be removed from | |
1858 | * a port is in the SCI_BASE_PORT_STATE_STOPPED. enum sci_status | |
1859 | * SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION is returned when the phy can not | |
1860 | * be added to the port. SCI_SUCCESS if the phy is added to the port. | |
1861 | */ | |
1862 | static enum sci_status scic_sds_port_stopped_state_remove_phy_handler( | |
1863 | struct scic_sds_port *port, | |
1864 | struct scic_sds_phy *phy) | |
1865 | { | |
1866 | return scic_sds_port_clear_phy(port, phy); | |
1867 | } | |
1868 | ||
1869 | /* | |
1870 | * **************************************************************************** | |
1871 | * * READY STATE HANDLERS | |
1872 | * **************************************************************************** */ | |
1873 | ||
1874 | /* | |
1875 | * **************************************************************************** | |
1876 | * * RESETTING STATE HANDLERS | |
1877 | * **************************************************************************** */ | |
1878 | ||
1879 | /* | |
1880 | * **************************************************************************** | |
1881 | * * STOPPING STATE HANDLERS | |
1882 | * **************************************************************************** */ | |
1883 | ||
1884 | /* | |
1885 | * This method takes the struct scic_sds_port that is in a stopping state and handles | |
1886 | * the complete io request. Should the request count reach 0 then the port | |
1887 | * object will transition to the stopped state. enum sci_status SCI_SUCCESS | |
1888 | */ | |
1889 | static enum sci_status scic_sds_port_stopping_state_complete_io_handler( | |
1890 | struct scic_sds_port *sci_port, | |
1891 | struct scic_sds_remote_device *device, | |
1892 | struct scic_sds_request *io_request) | |
1893 | { | |
1894 | scic_sds_port_decrement_request_count(sci_port); | |
1895 | ||
e91f41ef PS |
1896 | if (sci_port->started_request_count == 0) |
1897 | port_state_machine_change(sci_port, | |
1898 | SCI_BASE_PORT_STATE_STOPPED); | |
e2f8db50 DW |
1899 | |
1900 | return SCI_SUCCESS; | |
1901 | } | |
1902 | ||
1903 | /* | |
1904 | * **************************************************************************** | |
1905 | * * RESETTING STATE HANDLERS | |
1906 | * **************************************************************************** */ | |
1907 | ||
e2f8db50 DW |
1908 | /* |
1909 | * This method will transition a failed port to its ready state. The port | |
1910 | * failed because a hard reset request timed out but at some time later one or | |
1911 | * more phys in the port became ready. enum sci_status SCI_SUCCESS | |
1912 | */ | |
1913 | static void scic_sds_port_reset_state_link_up_handler( | |
1914 | struct scic_sds_port *port, | |
1915 | struct scic_sds_phy *phy) | |
1916 | { | |
1917 | /* | |
1918 | * / @todo We should make sure that the phy that has gone link up is the same | |
1919 | * / one on which we sent the reset. It is possible that the phy on | |
1920 | * / which we sent the reset is not the one that has gone link up and we | |
1921 | * / want to make sure that phy being reset comes back. Consider the | |
1922 | * / case where a reset is sent but before the hardware processes the | |
1923 | * / reset it get a link up on the port because of a hot plug event. | |
1924 | * / because of the reset request this phy will go link down almost | |
1925 | * / immediately. */ | |
1926 | ||
1927 | /* | |
1928 | * In the resetting state we don't notify the user regarding | |
1929 | * link up and link down notifications. */ | |
1930 | scic_sds_port_general_link_up_handler(port, phy, false); | |
1931 | } | |
1932 | ||
1933 | /* | |
1934 | * This method process link down notifications that occur during a port reset | |
1935 | * operation. Link downs can occur during the reset operation. enum sci_status | |
1936 | * SCI_SUCCESS | |
1937 | */ | |
1938 | static void scic_sds_port_reset_state_link_down_handler( | |
1939 | struct scic_sds_port *port, | |
1940 | struct scic_sds_phy *phy) | |
1941 | { | |
1942 | /* | |
1943 | * In the resetting state we don't notify the user regarding | |
1944 | * link up and link down notifications. */ | |
1945 | scic_sds_port_deactivate_phy(port, phy, false); | |
1946 | } | |
1947 | ||
d76f71d9 PS |
1948 | enum sci_status scic_sds_port_start(struct scic_sds_port *sci_port) |
1949 | { | |
1950 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1951 | struct isci_host *ihost = scic_to_ihost(scic); | |
1952 | enum sci_status status = SCI_SUCCESS; | |
1953 | enum scic_sds_port_states state; | |
1954 | u32 phy_mask; | |
1955 | ||
1956 | state = sci_port->state_machine.current_state_id; | |
1957 | if (state != SCI_BASE_PORT_STATE_STOPPED) { | |
1958 | dev_warn(sciport_to_dev(sci_port), | |
1959 | "%s: in wrong state: %d\n", __func__, state); | |
1960 | return SCI_FAILURE_INVALID_STATE; | |
1961 | } | |
1962 | ||
1963 | if (sci_port->assigned_device_count > 0) { | |
1964 | /* TODO This is a start failure operation because | |
1965 | * there are still devices assigned to this port. | |
1966 | * There must be no devices assigned to a port on a | |
1967 | * start operation. | |
1968 | */ | |
1969 | return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; | |
1970 | } | |
1971 | ||
1972 | sci_port->timer_handle = | |
1973 | isci_timer_create(ihost, | |
1974 | sci_port, | |
1975 | scic_sds_port_timeout_handler); | |
1976 | ||
1977 | if (!sci_port->timer_handle) | |
1978 | return SCI_FAILURE_INSUFFICIENT_RESOURCES; | |
1979 | ||
1980 | if (sci_port->reserved_rni == SCU_DUMMY_INDEX) { | |
1981 | u16 rni = scic_sds_remote_node_table_allocate_remote_node( | |
1982 | &scic->available_remote_nodes, 1); | |
1983 | ||
1984 | if (rni != SCU_DUMMY_INDEX) | |
1985 | scic_sds_port_construct_dummy_rnc(sci_port, rni); | |
1986 | else | |
1987 | status = SCI_FAILURE_INSUFFICIENT_RESOURCES; | |
1988 | sci_port->reserved_rni = rni; | |
1989 | } | |
1990 | ||
1991 | if (sci_port->reserved_tci == SCU_DUMMY_INDEX) { | |
1992 | /* Allocate a TCI and remove the sequence nibble */ | |
1993 | u16 tci = scic_controller_allocate_io_tag(scic); | |
1994 | ||
1995 | if (tci != SCU_DUMMY_INDEX) | |
1996 | scic_sds_port_construct_dummy_task(sci_port, tci); | |
1997 | else | |
1998 | status = SCI_FAILURE_INSUFFICIENT_RESOURCES; | |
1999 | sci_port->reserved_tci = tci; | |
2000 | } | |
2001 | ||
2002 | if (status == SCI_SUCCESS) { | |
2003 | phy_mask = scic_sds_port_get_phys(sci_port); | |
2004 | ||
2005 | /* | |
2006 | * There are one or more phys assigned to this port. Make sure | |
2007 | * the port's phy mask is in fact legal and supported by the | |
2008 | * silicon. | |
2009 | */ | |
2010 | if (scic_sds_port_is_phy_mask_valid(sci_port, phy_mask) == true) { | |
2011 | port_state_machine_change(sci_port, | |
2012 | SCI_BASE_PORT_STATE_READY); | |
2013 | ||
2014 | return SCI_SUCCESS; | |
2015 | } | |
2016 | status = SCI_FAILURE; | |
2017 | } | |
2018 | ||
2019 | if (status != SCI_SUCCESS) | |
2020 | scic_sds_port_destroy_dummy_resources(sci_port); | |
2021 | ||
2022 | return status; | |
2023 | } | |
2024 | ||
8bc80d30 PS |
2025 | enum sci_status scic_sds_port_stop(struct scic_sds_port *sci_port) |
2026 | { | |
2027 | enum scic_sds_port_states state; | |
2028 | ||
2029 | state = sci_port->state_machine.current_state_id; | |
2030 | switch (state) { | |
2031 | case SCI_BASE_PORT_STATE_STOPPED: | |
2032 | return SCI_SUCCESS; | |
2033 | case SCIC_SDS_PORT_READY_SUBSTATE_WAITING: | |
2034 | case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL: | |
2035 | case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING: | |
2036 | case SCI_BASE_PORT_STATE_RESETTING: | |
2037 | port_state_machine_change(sci_port, | |
2038 | SCI_BASE_PORT_STATE_STOPPING); | |
2039 | return SCI_SUCCESS; | |
2040 | default: | |
2041 | dev_warn(sciport_to_dev(sci_port), | |
2042 | "%s: in wrong state: %d\n", __func__, state); | |
2043 | return SCI_FAILURE_INVALID_STATE; | |
2044 | } | |
2045 | } | |
2046 | ||
c777c26c PS |
2047 | static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] = { |
2048 | [SCI_BASE_PORT_STATE_STOPPED] = { | |
c777c26c PS |
2049 | .reset_handler = scic_sds_port_default_reset_handler, |
2050 | .add_phy_handler = scic_sds_port_stopped_state_add_phy_handler, | |
2051 | .remove_phy_handler = scic_sds_port_stopped_state_remove_phy_handler, | |
2052 | .frame_handler = scic_sds_port_default_frame_handler, | |
2053 | .event_handler = scic_sds_port_default_event_handler, | |
2054 | .link_up_handler = scic_sds_port_default_link_up_handler, | |
2055 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
2056 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
2057 | .complete_io_handler = scic_sds_port_default_complete_io_handler | |
e2f8db50 | 2058 | }, |
c777c26c | 2059 | [SCI_BASE_PORT_STATE_STOPPING] = { |
c777c26c PS |
2060 | .reset_handler = scic_sds_port_default_reset_handler, |
2061 | .add_phy_handler = scic_sds_port_default_add_phy_handler, | |
2062 | .remove_phy_handler = scic_sds_port_default_remove_phy_handler, | |
2063 | .frame_handler = scic_sds_port_default_frame_handler, | |
2064 | .event_handler = scic_sds_port_default_event_handler, | |
2065 | .link_up_handler = scic_sds_port_default_link_up_handler, | |
2066 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
2067 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
2068 | .complete_io_handler = scic_sds_port_stopping_state_complete_io_handler | |
e2f8db50 | 2069 | }, |
c777c26c | 2070 | [SCI_BASE_PORT_STATE_READY] = { |
c777c26c PS |
2071 | .reset_handler = scic_sds_port_default_reset_handler, |
2072 | .add_phy_handler = scic_sds_port_default_add_phy_handler, | |
2073 | .remove_phy_handler = scic_sds_port_default_remove_phy_handler, | |
2074 | .frame_handler = scic_sds_port_default_frame_handler, | |
2075 | .event_handler = scic_sds_port_default_event_handler, | |
2076 | .link_up_handler = scic_sds_port_default_link_up_handler, | |
2077 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
2078 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
2079 | .complete_io_handler = scic_sds_port_general_complete_io_handler | |
e2f8db50 | 2080 | }, |
e91f41ef | 2081 | [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = { |
e91f41ef PS |
2082 | .reset_handler = scic_sds_port_default_reset_handler, |
2083 | .add_phy_handler = scic_sds_port_ready_substate_add_phy_handler, | |
2084 | .remove_phy_handler = scic_sds_port_default_remove_phy_handler, | |
2085 | .frame_handler = scic_sds_port_default_frame_handler, | |
2086 | .event_handler = scic_sds_port_default_event_handler, | |
2087 | .link_up_handler = scic_sds_port_ready_waiting_substate_link_up_handler, | |
2088 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
2089 | .start_io_handler = scic_sds_port_ready_waiting_substate_start_io_handler, | |
2090 | .complete_io_handler = scic_sds_port_ready_substate_complete_io_handler, | |
2091 | }, | |
2092 | [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = { | |
e91f41ef PS |
2093 | .reset_handler = scic_sds_port_ready_operational_substate_reset_handler, |
2094 | .add_phy_handler = scic_sds_port_ready_substate_add_phy_handler, | |
2095 | .remove_phy_handler = scic_sds_port_ready_substate_remove_phy_handler, | |
2096 | .frame_handler = scic_sds_port_default_frame_handler, | |
2097 | .event_handler = scic_sds_port_default_event_handler, | |
2098 | .link_up_handler = scic_sds_port_ready_operational_substate_link_up_handler, | |
2099 | .link_down_handler = scic_sds_port_ready_operational_substate_link_down_handler, | |
2100 | .start_io_handler = scic_sds_port_ready_operational_substate_start_io_handler, | |
2101 | .complete_io_handler = scic_sds_port_ready_substate_complete_io_handler, | |
2102 | }, | |
2103 | [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = { | |
e91f41ef PS |
2104 | .reset_handler = scic_sds_port_default_reset_handler, |
2105 | .add_phy_handler = scic_sds_port_ready_configuring_substate_add_phy_handler, | |
2106 | .remove_phy_handler = scic_sds_port_ready_configuring_substate_remove_phy_handler, | |
2107 | .frame_handler = scic_sds_port_default_frame_handler, | |
2108 | .event_handler = scic_sds_port_default_event_handler, | |
2109 | .link_up_handler = scic_sds_port_default_link_up_handler, | |
2110 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
2111 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
2112 | .complete_io_handler = scic_sds_port_ready_configuring_substate_complete_io_handler | |
2113 | }, | |
c777c26c | 2114 | [SCI_BASE_PORT_STATE_RESETTING] = { |
c777c26c PS |
2115 | .reset_handler = scic_sds_port_default_reset_handler, |
2116 | .add_phy_handler = scic_sds_port_default_add_phy_handler, | |
2117 | .remove_phy_handler = scic_sds_port_default_remove_phy_handler, | |
2118 | .frame_handler = scic_sds_port_default_frame_handler, | |
2119 | .event_handler = scic_sds_port_default_event_handler, | |
2120 | .link_up_handler = scic_sds_port_reset_state_link_up_handler, | |
2121 | .link_down_handler = scic_sds_port_reset_state_link_down_handler, | |
2122 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
2123 | .complete_io_handler = scic_sds_port_general_complete_io_handler | |
e2f8db50 | 2124 | }, |
c777c26c | 2125 | [SCI_BASE_PORT_STATE_FAILED] = { |
c777c26c PS |
2126 | .reset_handler = scic_sds_port_default_reset_handler, |
2127 | .add_phy_handler = scic_sds_port_default_add_phy_handler, | |
2128 | .remove_phy_handler = scic_sds_port_default_remove_phy_handler, | |
2129 | .frame_handler = scic_sds_port_default_frame_handler, | |
2130 | .event_handler = scic_sds_port_default_event_handler, | |
2131 | .link_up_handler = scic_sds_port_default_link_up_handler, | |
2132 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
2133 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
2134 | .complete_io_handler = scic_sds_port_general_complete_io_handler | |
e2f8db50 DW |
2135 | } |
2136 | }; | |
2137 | ||
2138 | /* | |
2139 | * ****************************************************************************** | |
2140 | * * PORT STATE PRIVATE METHODS | |
2141 | * ****************************************************************************** */ | |
2142 | ||
2143 | /** | |
2144 | * | |
2145 | * @sci_port: This is the port object which to suspend. | |
2146 | * | |
2147 | * This method will enable the SCU Port Task Scheduler for this port object but | |
2148 | * will leave the port task scheduler in a suspended state. none | |
2149 | */ | |
2150 | static void | |
2151 | scic_sds_port_enable_port_task_scheduler(struct scic_sds_port *port) | |
2152 | { | |
2153 | u32 pts_control_value; | |
2154 | ||
2155 | pts_control_value = readl(&port->port_task_scheduler_registers->control); | |
2156 | pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND); | |
2157 | writel(pts_control_value, &port->port_task_scheduler_registers->control); | |
2158 | } | |
2159 | ||
2160 | /** | |
2161 | * | |
2162 | * @sci_port: This is the port object which to resume. | |
2163 | * | |
2164 | * This method will disable the SCU port task scheduler for this port object. | |
2165 | * none | |
2166 | */ | |
2167 | static void | |
2168 | scic_sds_port_disable_port_task_scheduler(struct scic_sds_port *port) | |
2169 | { | |
2170 | u32 pts_control_value; | |
2171 | ||
2172 | pts_control_value = readl(&port->port_task_scheduler_registers->control); | |
2173 | pts_control_value &= | |
2174 | ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND)); | |
2175 | writel(pts_control_value, &port->port_task_scheduler_registers->control); | |
2176 | } | |
2177 | ||
2178 | static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port) | |
2179 | { | |
2180 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
2181 | u8 phys_index = sci_port->physical_port_index; | |
2182 | union scu_remote_node_context *rnc; | |
2183 | u16 rni = sci_port->reserved_rni; | |
2184 | u32 command; | |
2185 | ||
2186 | rnc = &scic->remote_node_context_table[rni]; | |
2187 | rnc->ssp.is_valid = true; | |
2188 | ||
2189 | command = SCU_CONTEXT_COMMAND_POST_RNC_32 | | |
2190 | phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; | |
2191 | ||
2192 | scic_sds_controller_post_request(scic, command); | |
2193 | ||
2194 | /* ensure hardware has seen the post rnc command and give it | |
2195 | * ample time to act before sending the suspend | |
2196 | */ | |
2197 | readl(&scic->smu_registers->interrupt_status); /* flush */ | |
2198 | udelay(10); | |
2199 | ||
2200 | command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX | | |
2201 | phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; | |
2202 | ||
2203 | scic_sds_controller_post_request(scic, command); | |
2204 | } | |
2205 | ||
e2f8db50 DW |
2206 | /* |
2207 | * ****************************************************************************** | |
2208 | * * PORT STATE METHODS | |
2209 | * ****************************************************************************** */ | |
2210 | ||
2211 | /** | |
2212 | * | |
2213 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2214 | * | |
2215 | * This method will perform the actions required by the struct scic_sds_port on | |
2216 | * entering the SCI_BASE_PORT_STATE_STOPPED. This function sets the stopped | |
2217 | * state handlers for the struct scic_sds_port object and disables the port task | |
2218 | * scheduler in the hardware. none | |
2219 | */ | |
2220 | static void scic_sds_port_stopped_state_enter(void *object) | |
2221 | { | |
2222 | struct scic_sds_port *sci_port = object; | |
2223 | ||
2224 | scic_sds_port_set_base_state_handlers( | |
2225 | sci_port, SCI_BASE_PORT_STATE_STOPPED | |
2226 | ); | |
2227 | ||
2228 | if ( | |
2229 | SCI_BASE_PORT_STATE_STOPPING | |
2230 | == sci_port->state_machine.previous_state_id | |
2231 | ) { | |
2232 | /* | |
2233 | * If we enter this state becasuse of a request to stop | |
2234 | * the port then we want to disable the hardwares port | |
2235 | * task scheduler. */ | |
2236 | scic_sds_port_disable_port_task_scheduler(sci_port); | |
2237 | } | |
2238 | } | |
2239 | ||
2240 | /** | |
2241 | * | |
2242 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2243 | * | |
2244 | * This method will perform the actions required by the struct scic_sds_port on | |
2245 | * exiting the SCI_BASE_STATE_STOPPED. This function enables the SCU hardware | |
2246 | * port task scheduler. none | |
2247 | */ | |
2248 | static void scic_sds_port_stopped_state_exit(void *object) | |
2249 | { | |
2250 | struct scic_sds_port *sci_port = object; | |
2251 | ||
2252 | /* Enable and suspend the port task scheduler */ | |
2253 | scic_sds_port_enable_port_task_scheduler(sci_port); | |
2254 | } | |
2255 | ||
2256 | /** | |
2257 | * scic_sds_port_ready_state_enter - | |
2258 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2259 | * | |
2260 | * This method will perform the actions required by the struct scic_sds_port on | |
2261 | * entering the SCI_BASE_PORT_STATE_READY. This function sets the ready state | |
2262 | * handlers for the struct scic_sds_port object, reports the port object as | |
2263 | * not ready and starts the ready substate machine. none | |
2264 | */ | |
2265 | static void scic_sds_port_ready_state_enter(void *object) | |
2266 | { | |
2267 | struct scic_sds_port *sci_port = object; | |
2268 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
2269 | struct isci_host *ihost = scic_to_ihost(scic); | |
2270 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
2271 | u32 prev_state; | |
2272 | ||
2273 | /* Put the ready state handlers in place though they will not be there long */ | |
2274 | scic_sds_port_set_base_state_handlers(sci_port, SCI_BASE_PORT_STATE_READY); | |
2275 | ||
2276 | prev_state = sci_port->state_machine.previous_state_id; | |
2277 | if (prev_state == SCI_BASE_PORT_STATE_RESETTING) | |
2278 | isci_port_hard_reset_complete(iport, SCI_SUCCESS); | |
2279 | else | |
2280 | isci_port_not_ready(ihost, iport); | |
2281 | ||
2282 | /* Post and suspend the dummy remote node context for this port. */ | |
2283 | scic_sds_port_post_dummy_remote_node(sci_port); | |
2284 | ||
2285 | /* Start the ready substate machine */ | |
e91f41ef PS |
2286 | port_state_machine_change(sci_port, |
2287 | SCIC_SDS_PORT_READY_SUBSTATE_WAITING); | |
e2f8db50 DW |
2288 | } |
2289 | ||
2290 | /** | |
2291 | * | |
2292 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2293 | * | |
2294 | * This method will perform the actions required by the struct scic_sds_port on | |
2295 | * entering the SCI_BASE_PORT_STATE_RESETTING. This function sets the resetting | |
2296 | * state handlers for the struct scic_sds_port object. none | |
2297 | */ | |
2298 | static void scic_sds_port_resetting_state_enter(void *object) | |
2299 | { | |
2300 | struct scic_sds_port *sci_port = object; | |
2301 | ||
2302 | scic_sds_port_set_base_state_handlers( | |
2303 | sci_port, SCI_BASE_PORT_STATE_RESETTING | |
2304 | ); | |
2305 | } | |
2306 | ||
2307 | /** | |
2308 | * | |
2309 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2310 | * | |
2311 | * This function will perform the actions required by the | |
2312 | * struct scic_sds_port on | |
2313 | * exiting the SCI_BASE_STATE_RESETTING. This function does nothing. none | |
2314 | */ | |
2315 | static inline void scic_sds_port_resetting_state_exit(void *object) | |
2316 | { | |
2317 | struct scic_sds_port *sci_port = object; | |
2318 | ||
2319 | isci_timer_stop(sci_port->timer_handle); | |
2320 | } | |
2321 | ||
2322 | /** | |
2323 | * | |
2324 | * @object: This is the void object which is cast to a | |
2325 | * struct scic_sds_port object. | |
2326 | * | |
2327 | * This method will perform the actions required by the struct scic_sds_port on | |
2328 | * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping | |
2329 | * state handlers for the struct scic_sds_port object. none | |
2330 | */ | |
2331 | static void scic_sds_port_stopping_state_enter(void *object) | |
2332 | { | |
2333 | struct scic_sds_port *sci_port = object; | |
2334 | ||
2335 | scic_sds_port_set_base_state_handlers( | |
2336 | sci_port, SCI_BASE_PORT_STATE_STOPPING | |
2337 | ); | |
2338 | } | |
2339 | ||
2340 | /** | |
2341 | * | |
2342 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2343 | * | |
2344 | * This function will perform the actions required by the | |
2345 | * struct scic_sds_port on | |
2346 | * exiting the SCI_BASE_STATE_STOPPING. This function does nothing. none | |
2347 | */ | |
2348 | static inline void | |
2349 | scic_sds_port_stopping_state_exit(void *object) | |
2350 | { | |
2351 | struct scic_sds_port *sci_port = object; | |
2352 | ||
2353 | isci_timer_stop(sci_port->timer_handle); | |
2354 | ||
2355 | scic_sds_port_destroy_dummy_resources(sci_port); | |
2356 | } | |
2357 | ||
2358 | /** | |
2359 | * | |
2360 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2361 | * | |
2362 | * This function will perform the actions required by the | |
2363 | * struct scic_sds_port on | |
2364 | * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping | |
2365 | * state handlers for the struct scic_sds_port object. none | |
2366 | */ | |
2367 | static void scic_sds_port_failed_state_enter(void *object) | |
2368 | { | |
2369 | struct scic_sds_port *sci_port = object; | |
2370 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
2371 | ||
2372 | scic_sds_port_set_base_state_handlers(sci_port, | |
2373 | SCI_BASE_PORT_STATE_FAILED); | |
2374 | ||
2375 | isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT); | |
2376 | } | |
2377 | ||
2378 | /* --------------------------------------------------------------------------- */ | |
2379 | ||
2380 | static const struct sci_base_state scic_sds_port_state_table[] = { | |
2381 | [SCI_BASE_PORT_STATE_STOPPED] = { | |
2382 | .enter_state = scic_sds_port_stopped_state_enter, | |
2383 | .exit_state = scic_sds_port_stopped_state_exit | |
2384 | }, | |
2385 | [SCI_BASE_PORT_STATE_STOPPING] = { | |
2386 | .enter_state = scic_sds_port_stopping_state_enter, | |
2387 | .exit_state = scic_sds_port_stopping_state_exit | |
2388 | }, | |
2389 | [SCI_BASE_PORT_STATE_READY] = { | |
2390 | .enter_state = scic_sds_port_ready_state_enter, | |
e91f41ef PS |
2391 | }, |
2392 | [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = { | |
2393 | .enter_state = scic_sds_port_ready_substate_waiting_enter, | |
2394 | }, | |
2395 | [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = { | |
2396 | .enter_state = scic_sds_port_ready_substate_operational_enter, | |
2397 | .exit_state = scic_sds_port_ready_substate_operational_exit | |
2398 | }, | |
2399 | [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = { | |
2400 | .enter_state = scic_sds_port_ready_substate_configuring_enter, | |
2401 | .exit_state = scic_sds_port_ready_substate_configuring_exit | |
e2f8db50 DW |
2402 | }, |
2403 | [SCI_BASE_PORT_STATE_RESETTING] = { | |
2404 | .enter_state = scic_sds_port_resetting_state_enter, | |
2405 | .exit_state = scic_sds_port_resetting_state_exit | |
2406 | }, | |
2407 | [SCI_BASE_PORT_STATE_FAILED] = { | |
2408 | .enter_state = scic_sds_port_failed_state_enter, | |
2409 | } | |
2410 | }; | |
2411 | ||
2412 | void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index, | |
2413 | struct scic_sds_controller *scic) | |
2414 | { | |
2415 | sci_base_state_machine_construct(&sci_port->state_machine, | |
2416 | sci_port, | |
2417 | scic_sds_port_state_table, | |
2418 | SCI_BASE_PORT_STATE_STOPPED); | |
2419 | ||
2420 | sci_base_state_machine_start(&sci_port->state_machine); | |
2421 | ||
e2f8db50 DW |
2422 | sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT; |
2423 | sci_port->physical_port_index = index; | |
2424 | sci_port->active_phy_mask = 0; | |
e91f41ef | 2425 | sci_port->ready_exit = false; |
e2f8db50 DW |
2426 | |
2427 | sci_port->owning_controller = scic; | |
2428 | ||
2429 | sci_port->started_request_count = 0; | |
2430 | sci_port->assigned_device_count = 0; | |
2431 | ||
2432 | sci_port->reserved_rni = SCU_DUMMY_INDEX; | |
2433 | sci_port->reserved_tci = SCU_DUMMY_INDEX; | |
2434 | ||
2435 | sci_port->timer_handle = NULL; | |
2436 | sci_port->port_task_scheduler_registers = NULL; | |
2437 | ||
2438 | for (index = 0; index < SCI_MAX_PHYS; index++) | |
2439 | sci_port->phy_table[index] = NULL; | |
2440 | } | |
2441 | ||
2442 | void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index) | |
2443 | { | |
2444 | INIT_LIST_HEAD(&iport->remote_dev_list); | |
2445 | INIT_LIST_HEAD(&iport->domain_dev_list); | |
2446 | spin_lock_init(&iport->state_lock); | |
2447 | init_completion(&iport->start_complete); | |
2448 | iport->isci_host = ihost; | |
2449 | isci_port_change_state(iport, isci_freed); | |
2450 | } | |
2451 | ||
2452 | /** | |
2453 | * isci_port_get_state() - This function gets the status of the port object. | |
2454 | * @isci_port: This parameter points to the isci_port object | |
2455 | * | |
2456 | * status of the object as a isci_status enum. | |
2457 | */ | |
2458 | enum isci_status isci_port_get_state( | |
2459 | struct isci_port *isci_port) | |
2460 | { | |
2461 | return isci_port->status; | |
2462 | } | |
2463 | ||
2464 | static void isci_port_bc_change_received(struct isci_host *ihost, | |
2465 | struct scic_sds_port *sci_port, | |
2466 | struct scic_sds_phy *sci_phy) | |
2467 | { | |
2468 | struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); | |
2469 | ||
2470 | dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n", | |
2471 | __func__, iphy, &iphy->sas_phy); | |
2472 | ||
2473 | ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); | |
2474 | scic_port_enable_broadcast_change_notification(sci_port); | |
2475 | } | |
2476 | ||
2477 | void scic_sds_port_broadcast_change_received( | |
2478 | struct scic_sds_port *sci_port, | |
2479 | struct scic_sds_phy *sci_phy) | |
2480 | { | |
2481 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
2482 | struct isci_host *ihost = scic_to_ihost(scic); | |
2483 | ||
2484 | /* notify the user. */ | |
2485 | isci_port_bc_change_received(ihost, sci_port, sci_phy); | |
2486 | } | |
2487 | ||
2488 | int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport, | |
2489 | struct isci_phy *iphy) | |
2490 | { | |
2491 | unsigned long flags; | |
2492 | enum sci_status status; | |
2493 | int ret = TMF_RESP_FUNC_COMPLETE; | |
2494 | ||
2495 | dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n", | |
2496 | __func__, iport); | |
2497 | ||
2498 | init_completion(&iport->hard_reset_complete); | |
2499 | ||
2500 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
2501 | ||
2502 | #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT | |
2503 | status = scic_port_hard_reset(&iport->sci, ISCI_PORT_RESET_TIMEOUT); | |
2504 | ||
2505 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
2506 | ||
2507 | if (status == SCI_SUCCESS) { | |
2508 | wait_for_completion(&iport->hard_reset_complete); | |
2509 | ||
2510 | dev_dbg(&ihost->pdev->dev, | |
2511 | "%s: iport = %p; hard reset completion\n", | |
2512 | __func__, iport); | |
2513 | ||
2514 | if (iport->hard_reset_status != SCI_SUCCESS) | |
2515 | ret = TMF_RESP_FUNC_FAILED; | |
2516 | } else { | |
2517 | ret = TMF_RESP_FUNC_FAILED; | |
2518 | ||
2519 | dev_err(&ihost->pdev->dev, | |
2520 | "%s: iport = %p; scic_port_hard_reset call" | |
2521 | " failed 0x%x\n", | |
2522 | __func__, iport, status); | |
2523 | ||
2524 | } | |
2525 | ||
2526 | /* If the hard reset for the port has failed, consider this | |
2527 | * the same as link failures on all phys in the port. | |
2528 | */ | |
2529 | if (ret != TMF_RESP_FUNC_COMPLETE) { | |
2530 | dev_err(&ihost->pdev->dev, | |
2531 | "%s: iport = %p; hard reset failed " | |
2532 | "(0x%x) - sending link down to libsas for phy %p\n", | |
2533 | __func__, iport, iport->hard_reset_status, iphy); | |
2534 | ||
2535 | isci_port_link_down(ihost, iphy, iport); | |
2536 | } | |
2537 | ||
2538 | return ret; | |
2539 | } | |
2540 | ||
2541 | /** | |
2542 | * isci_port_deformed() - This function is called by libsas when a port becomes | |
2543 | * inactive. | |
2544 | * @phy: This parameter specifies the libsas phy with the inactive port. | |
2545 | * | |
2546 | */ | |
2547 | void isci_port_deformed(struct asd_sas_phy *phy) | |
2548 | { | |
2549 | pr_debug("%s: sas_phy = %p\n", __func__, phy); | |
2550 | } | |
2551 | ||
2552 | /** | |
2553 | * isci_port_formed() - This function is called by libsas when a port becomes | |
2554 | * active. | |
2555 | * @phy: This parameter specifies the libsas phy with the active port. | |
2556 | * | |
2557 | */ | |
2558 | void isci_port_formed(struct asd_sas_phy *phy) | |
2559 | { | |
2560 | pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port); | |
09d7da13 | 2561 | } |