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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 | ||
e2f8db50 DW |
534 | |
535 | /** | |
536 | * This method requests the SAS address for the supplied SAS port from the SCI | |
537 | * implementation. | |
538 | * @sci_port: a handle corresponding to the SAS port for which to return the | |
539 | * SAS address. | |
540 | * @sas_address: This parameter specifies a pointer to a SAS address structure | |
541 | * into which the core will copy the SAS address for the port. | |
542 | * | |
543 | */ | |
544 | void scic_sds_port_get_sas_address( | |
545 | struct scic_sds_port *sci_port, | |
546 | struct sci_sas_address *sas_address) | |
547 | { | |
548 | u32 index; | |
549 | ||
550 | sas_address->high = 0; | |
551 | sas_address->low = 0; | |
552 | ||
553 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
554 | if (sci_port->phy_table[index] != NULL) { | |
555 | scic_sds_phy_get_sas_address(sci_port->phy_table[index], sas_address); | |
556 | } | |
557 | } | |
558 | } | |
559 | ||
560 | /* | |
561 | * This function requests the SAS address for the device directly attached to | |
562 | * this SAS port. | |
563 | * @sci_port: a handle corresponding to the SAS port for which to return the | |
564 | * SAS address. | |
565 | * @sas_address: This parameter specifies a pointer to a SAS address structure | |
566 | * into which the core will copy the SAS address for the device directly | |
567 | * attached to the port. | |
568 | * | |
569 | */ | |
570 | void scic_sds_port_get_attached_sas_address( | |
571 | struct scic_sds_port *sci_port, | |
572 | struct sci_sas_address *sas_address) | |
573 | { | |
574 | struct scic_sds_phy *sci_phy; | |
575 | ||
576 | /* | |
577 | * Ensure that the phy is both part of the port and currently | |
578 | * connected to the remote end-point. | |
6f231dda | 579 | */ |
e2f8db50 DW |
580 | sci_phy = scic_sds_port_get_a_connected_phy(sci_port); |
581 | if (sci_phy) { | |
582 | if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) { | |
583 | scic_sds_phy_get_attached_sas_address(sci_phy, | |
584 | sas_address); | |
585 | } else { | |
586 | scic_sds_phy_get_sas_address(sci_phy, sas_address); | |
587 | sas_address->low += sci_phy->phy_index; | |
588 | } | |
589 | } else { | |
590 | sas_address->high = 0; | |
591 | sas_address->low = 0; | |
592 | } | |
593 | } | |
4393aa4e | 594 | |
e2f8db50 DW |
595 | /** |
596 | * scic_sds_port_construct_dummy_rnc() - create dummy rnc for si workaround | |
597 | * | |
598 | * @sci_port: logical port on which we need to create the remote node context | |
599 | * @rni: remote node index for this remote node context. | |
600 | * | |
601 | * This routine will construct a dummy remote node context data structure | |
602 | * This structure will be posted to the hardware to work around a scheduler | |
603 | * error in the hardware. | |
604 | */ | |
605 | static void scic_sds_port_construct_dummy_rnc(struct scic_sds_port *sci_port, u16 rni) | |
606 | { | |
607 | union scu_remote_node_context *rnc; | |
608 | ||
609 | rnc = &sci_port->owning_controller->remote_node_context_table[rni]; | |
610 | ||
611 | memset(rnc, 0, sizeof(union scu_remote_node_context)); | |
612 | ||
613 | rnc->ssp.remote_sas_address_hi = 0; | |
614 | rnc->ssp.remote_sas_address_lo = 0; | |
615 | ||
616 | rnc->ssp.remote_node_index = rni; | |
617 | rnc->ssp.remote_node_port_width = 1; | |
618 | rnc->ssp.logical_port_index = sci_port->physical_port_index; | |
619 | ||
620 | rnc->ssp.nexus_loss_timer_enable = false; | |
621 | rnc->ssp.check_bit = false; | |
622 | rnc->ssp.is_valid = true; | |
623 | rnc->ssp.is_remote_node_context = true; | |
624 | rnc->ssp.function_number = 0; | |
625 | rnc->ssp.arbitration_wait_time = 0; | |
626 | } | |
627 | ||
628 | /** | |
629 | * scic_sds_port_construct_dummy_task() - create dummy task for si workaround | |
630 | * @sci_port The logical port on which we need to create the | |
631 | * remote node context. | |
632 | * context. | |
633 | * @tci The remote node index for this remote node context. | |
634 | * | |
635 | * This routine will construct a dummy task context data structure. This | |
636 | * structure will be posted to the hardwre to work around a scheduler error | |
637 | * in the hardware. | |
638 | * | |
639 | */ | |
640 | static void scic_sds_port_construct_dummy_task(struct scic_sds_port *sci_port, u16 tci) | |
641 | { | |
642 | struct scu_task_context *task_context; | |
643 | ||
644 | task_context = scic_sds_controller_get_task_context_buffer(sci_port->owning_controller, tci); | |
645 | ||
646 | memset(task_context, 0, sizeof(struct scu_task_context)); | |
647 | ||
648 | task_context->abort = 0; | |
649 | task_context->priority = 0; | |
650 | task_context->initiator_request = 1; | |
651 | task_context->connection_rate = 1; | |
652 | task_context->protocol_engine_index = 0; | |
653 | task_context->logical_port_index = sci_port->physical_port_index; | |
654 | task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP; | |
655 | task_context->task_index = scic_sds_io_tag_get_index(tci); | |
656 | task_context->valid = SCU_TASK_CONTEXT_VALID; | |
657 | task_context->context_type = SCU_TASK_CONTEXT_TYPE; | |
658 | ||
659 | task_context->remote_node_index = sci_port->reserved_rni; | |
660 | task_context->command_code = 0; | |
661 | ||
662 | task_context->link_layer_control = 0; | |
663 | task_context->do_not_dma_ssp_good_response = 1; | |
664 | task_context->strict_ordering = 0; | |
665 | task_context->control_frame = 0; | |
666 | task_context->timeout_enable = 0; | |
667 | task_context->block_guard_enable = 0; | |
668 | ||
669 | task_context->address_modifier = 0; | |
670 | ||
671 | task_context->task_phase = 0x01; | |
672 | } | |
673 | ||
674 | static void scic_sds_port_destroy_dummy_resources(struct scic_sds_port *sci_port) | |
675 | { | |
676 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
677 | ||
678 | if (sci_port->reserved_tci != SCU_DUMMY_INDEX) | |
679 | scic_controller_free_io_tag(scic, sci_port->reserved_tci); | |
680 | ||
681 | if (sci_port->reserved_rni != SCU_DUMMY_INDEX) | |
682 | scic_sds_remote_node_table_release_remote_node_index(&scic->available_remote_nodes, | |
683 | 1, sci_port->reserved_rni); | |
684 | ||
685 | sci_port->reserved_rni = SCU_DUMMY_INDEX; | |
686 | sci_port->reserved_tci = SCU_DUMMY_INDEX; | |
687 | } | |
688 | ||
689 | /** | |
690 | * This method performs initialization of the supplied port. Initialization | |
691 | * includes: - state machine initialization - member variable initialization | |
692 | * - configuring the phy_mask | |
693 | * @sci_port: | |
694 | * @transport_layer_registers: | |
695 | * @port_task_scheduler_registers: | |
696 | * @port_configuration_regsiter: | |
697 | * | |
698 | * enum sci_status SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION This value is returned | |
699 | * if the phy being added to the port | |
700 | */ | |
701 | enum sci_status scic_sds_port_initialize( | |
702 | struct scic_sds_port *sci_port, | |
703 | void __iomem *port_task_scheduler_registers, | |
704 | void __iomem *port_configuration_regsiter, | |
705 | void __iomem *viit_registers) | |
706 | { | |
707 | sci_port->port_task_scheduler_registers = port_task_scheduler_registers; | |
708 | sci_port->port_pe_configuration_register = port_configuration_regsiter; | |
709 | sci_port->viit_registers = viit_registers; | |
710 | ||
711 | return SCI_SUCCESS; | |
712 | } | |
713 | ||
e2f8db50 DW |
714 | |
715 | /** | |
716 | * This method assigns the direct attached device ID for this port. | |
717 | * | |
718 | * @param[in] sci_port The port for which the direct attached device id is to | |
719 | * be assigned. | |
720 | * @param[in] device_id The direct attached device ID to assign to the port. | |
721 | * This will be the RNi for the device | |
722 | */ | |
723 | void scic_sds_port_setup_transports( | |
724 | struct scic_sds_port *sci_port, | |
725 | u32 device_id) | |
726 | { | |
727 | u8 index; | |
728 | ||
729 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
730 | if (sci_port->active_phy_mask & (1 << index)) | |
731 | scic_sds_phy_setup_transport(sci_port->phy_table[index], device_id); | |
6f231dda | 732 | } |
e2f8db50 | 733 | } |
6f231dda | 734 | |
e2f8db50 DW |
735 | /** |
736 | * | |
737 | * @sci_port: This is the port on which the phy should be enabled. | |
738 | * @sci_phy: This is the specific phy which to enable. | |
739 | * @do_notify_user: This parameter specifies whether to inform the user (via | |
740 | * scic_cb_port_link_up()) as to the fact that a new phy as become ready. | |
741 | * | |
742 | * This function will activate the phy in the port. | |
743 | * Activation includes: - adding | |
744 | * the phy to the port - enabling the Protocol Engine in the silicon. - | |
745 | * notifying the user that the link is up. none | |
746 | */ | |
747 | static void scic_sds_port_activate_phy(struct scic_sds_port *sci_port, | |
748 | struct scic_sds_phy *sci_phy, | |
749 | bool do_notify_user) | |
750 | { | |
751 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
752 | struct isci_host *ihost = scic_to_ihost(scic); | |
753 | ||
754 | if (sci_phy->protocol != SCIC_SDS_PHY_PROTOCOL_SATA) | |
755 | scic_sds_phy_resume(sci_phy); | |
756 | ||
757 | sci_port->active_phy_mask |= 1 << sci_phy->phy_index; | |
758 | ||
759 | scic_sds_controller_clear_invalid_phy(scic, sci_phy); | |
760 | ||
761 | if (do_notify_user == true) | |
762 | isci_port_link_up(ihost, sci_port, sci_phy); | |
6f231dda | 763 | } |
09d7da13 | 764 | |
e2f8db50 DW |
765 | void scic_sds_port_deactivate_phy(struct scic_sds_port *sci_port, |
766 | struct scic_sds_phy *sci_phy, | |
767 | bool do_notify_user) | |
09d7da13 | 768 | { |
e2f8db50 DW |
769 | struct scic_sds_controller *scic = scic_sds_port_get_controller(sci_port); |
770 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
771 | struct isci_host *ihost = scic_to_ihost(scic); | |
772 | struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); | |
773 | ||
774 | sci_port->active_phy_mask &= ~(1 << sci_phy->phy_index); | |
775 | ||
776 | sci_phy->max_negotiated_speed = SAS_LINK_RATE_UNKNOWN; | |
777 | ||
778 | /* Re-assign the phy back to the LP as if it were a narrow port */ | |
779 | writel(sci_phy->phy_index, | |
780 | &sci_port->port_pe_configuration_register[sci_phy->phy_index]); | |
781 | ||
782 | if (do_notify_user == true) | |
783 | isci_port_link_down(ihost, iphy, iport); | |
784 | } | |
785 | ||
786 | /** | |
787 | * | |
788 | * @sci_port: This is the port on which the phy should be disabled. | |
789 | * @sci_phy: This is the specific phy which to disabled. | |
790 | * | |
791 | * This function will disable the phy and report that the phy is not valid for | |
792 | * this port object. None | |
793 | */ | |
794 | static void scic_sds_port_invalid_link_up(struct scic_sds_port *sci_port, | |
795 | struct scic_sds_phy *sci_phy) | |
796 | { | |
797 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
798 | ||
799 | /* | |
800 | * Check to see if we have alreay reported this link as bad and if | |
801 | * not go ahead and tell the SCI_USER that we have discovered an | |
802 | * invalid link. | |
803 | */ | |
804 | if ((scic->invalid_phy_mask & (1 << sci_phy->phy_index)) == 0) { | |
805 | scic_sds_controller_set_invalid_phy(scic, sci_phy); | |
806 | dev_warn(&scic_to_ihost(scic)->pdev->dev, "Invalid link up!\n"); | |
807 | } | |
808 | } | |
809 | ||
e91f41ef PS |
810 | static bool is_port_ready_state(enum scic_sds_port_states state) |
811 | { | |
812 | switch (state) { | |
813 | case SCI_BASE_PORT_STATE_READY: | |
814 | case SCIC_SDS_PORT_READY_SUBSTATE_WAITING: | |
815 | case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL: | |
816 | case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING: | |
817 | return true; | |
818 | default: | |
819 | return false; | |
820 | } | |
821 | } | |
822 | ||
823 | /* flag dummy rnc hanling when exiting a ready state */ | |
824 | static void port_state_machine_change(struct scic_sds_port *sci_port, | |
825 | enum scic_sds_port_states state) | |
826 | { | |
827 | struct sci_base_state_machine *sm = &sci_port->state_machine; | |
828 | enum scic_sds_port_states old_state = sm->current_state_id; | |
829 | ||
830 | if (is_port_ready_state(old_state) && !is_port_ready_state(state)) | |
831 | sci_port->ready_exit = true; | |
832 | ||
833 | sci_base_state_machine_change_state(sm, state); | |
834 | sci_port->ready_exit = false; | |
835 | } | |
836 | ||
e2f8db50 DW |
837 | /** |
838 | * scic_sds_port_general_link_up_handler - phy can be assigned to port? | |
839 | * @sci_port: scic_sds_port object for which has a phy that has gone link up. | |
840 | * @sci_phy: This is the struct scic_sds_phy object that has gone link up. | |
841 | * @do_notify_user: This parameter specifies whether to inform the user (via | |
842 | * scic_cb_port_link_up()) as to the fact that a new phy as become ready. | |
843 | * | |
844 | * Determine if this phy can be assigned to this | |
845 | * port . If the phy is not a valid PHY for | |
846 | * this port then the function will notify the user. A PHY can only be | |
847 | * part of a port if it's attached SAS ADDRESS is the same as all other PHYs in | |
848 | * the same port. none | |
849 | */ | |
850 | static void scic_sds_port_general_link_up_handler(struct scic_sds_port *sci_port, | |
851 | struct scic_sds_phy *sci_phy, | |
852 | bool do_notify_user) | |
853 | { | |
854 | struct sci_sas_address port_sas_address; | |
855 | struct sci_sas_address phy_sas_address; | |
856 | ||
857 | scic_sds_port_get_attached_sas_address(sci_port, &port_sas_address); | |
858 | scic_sds_phy_get_attached_sas_address(sci_phy, &phy_sas_address); | |
859 | ||
860 | /* If the SAS address of the new phy matches the SAS address of | |
861 | * other phys in the port OR this is the first phy in the port, | |
862 | * then activate the phy and allow it to be used for operations | |
863 | * in this port. | |
864 | */ | |
865 | if ((phy_sas_address.high == port_sas_address.high && | |
866 | phy_sas_address.low == port_sas_address.low) || | |
867 | sci_port->active_phy_mask == 0) { | |
868 | struct sci_base_state_machine *sm = &sci_port->state_machine; | |
869 | ||
870 | scic_sds_port_activate_phy(sci_port, sci_phy, do_notify_user); | |
871 | if (sm->current_state_id == SCI_BASE_PORT_STATE_RESETTING) | |
e91f41ef | 872 | port_state_machine_change(sci_port, SCI_BASE_PORT_STATE_READY); |
e2f8db50 DW |
873 | } else |
874 | scic_sds_port_invalid_link_up(sci_port, sci_phy); | |
875 | } | |
876 | ||
877 | ||
878 | ||
879 | /** | |
880 | * This method returns false if the port only has a single phy object assigned. | |
881 | * If there are no phys or more than one phy then the method will return | |
882 | * true. | |
883 | * @sci_port: The port for which the wide port condition is to be checked. | |
884 | * | |
885 | * bool true Is returned if this is a wide ported port. false Is returned if | |
886 | * this is a narrow port. | |
887 | */ | |
888 | static bool scic_sds_port_is_wide(struct scic_sds_port *sci_port) | |
889 | { | |
890 | u32 index; | |
891 | u32 phy_count = 0; | |
892 | ||
893 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
894 | if (sci_port->phy_table[index] != NULL) { | |
895 | phy_count++; | |
896 | } | |
897 | } | |
898 | ||
899 | return phy_count != 1; | |
900 | } | |
901 | ||
902 | /** | |
903 | * This method is called by the PHY object when the link is detected. if the | |
904 | * port wants the PHY to continue on to the link up state then the port | |
905 | * layer must return true. If the port object returns false the phy object | |
906 | * must halt its attempt to go link up. | |
907 | * @sci_port: The port associated with the phy object. | |
908 | * @sci_phy: The phy object that is trying to go link up. | |
909 | * | |
910 | * true if the phy object can continue to the link up condition. true Is | |
911 | * returned if this phy can continue to the ready state. false Is returned if | |
912 | * can not continue on to the ready state. This notification is in place for | |
913 | * wide ports and direct attached phys. Since there are no wide ported SATA | |
914 | * devices this could become an invalid port configuration. | |
915 | */ | |
916 | bool scic_sds_port_link_detected( | |
917 | struct scic_sds_port *sci_port, | |
918 | struct scic_sds_phy *sci_phy) | |
919 | { | |
920 | if ((sci_port->logical_port_index != SCIC_SDS_DUMMY_PORT) && | |
921 | (sci_phy->protocol == SCIC_SDS_PHY_PROTOCOL_SATA) && | |
922 | scic_sds_port_is_wide(sci_port)) { | |
923 | scic_sds_port_invalid_link_up(sci_port, sci_phy); | |
924 | ||
925 | return false; | |
926 | } | |
927 | ||
928 | return true; | |
929 | } | |
930 | ||
931 | /** | |
932 | * This method is the entry point for the phy to inform the port that it is now | |
933 | * in a ready state | |
934 | * @sci_port: | |
935 | * | |
936 | * | |
937 | */ | |
938 | void scic_sds_port_link_up( | |
939 | struct scic_sds_port *sci_port, | |
940 | struct scic_sds_phy *sci_phy) | |
941 | { | |
942 | sci_phy->is_in_link_training = false; | |
943 | ||
944 | sci_port->state_handlers->link_up_handler(sci_port, sci_phy); | |
945 | } | |
946 | ||
947 | /** | |
948 | * This method is the entry point for the phy to inform the port that it is no | |
949 | * longer in a ready state | |
950 | * @sci_port: | |
951 | * | |
952 | * | |
953 | */ | |
954 | void scic_sds_port_link_down( | |
955 | struct scic_sds_port *sci_port, | |
956 | struct scic_sds_phy *sci_phy) | |
957 | { | |
958 | sci_port->state_handlers->link_down_handler(sci_port, sci_phy); | |
959 | } | |
960 | ||
961 | /** | |
962 | * This method is called to start an IO request on this port. | |
963 | * @sci_port: | |
964 | * @sci_dev: | |
965 | * @sci_req: | |
966 | * | |
967 | * enum sci_status | |
968 | */ | |
969 | enum sci_status scic_sds_port_start_io( | |
970 | struct scic_sds_port *sci_port, | |
971 | struct scic_sds_remote_device *sci_dev, | |
972 | struct scic_sds_request *sci_req) | |
973 | { | |
974 | return sci_port->state_handlers->start_io_handler( | |
975 | sci_port, sci_dev, sci_req); | |
976 | } | |
977 | ||
978 | /** | |
979 | * This method is called to complete an IO request to the port. | |
980 | * @sci_port: | |
981 | * @sci_dev: | |
982 | * @sci_req: | |
983 | * | |
984 | * enum sci_status | |
985 | */ | |
986 | enum sci_status scic_sds_port_complete_io( | |
987 | struct scic_sds_port *sci_port, | |
988 | struct scic_sds_remote_device *sci_dev, | |
989 | struct scic_sds_request *sci_req) | |
990 | { | |
991 | return sci_port->state_handlers->complete_io_handler( | |
992 | sci_port, sci_dev, sci_req); | |
993 | } | |
994 | ||
995 | /** | |
996 | * This method is provided to timeout requests for port operations. Mostly its | |
997 | * for the port reset operation. | |
998 | * | |
999 | * | |
1000 | */ | |
1001 | static void scic_sds_port_timeout_handler(void *port) | |
1002 | { | |
1003 | struct scic_sds_port *sci_port = port; | |
1004 | u32 current_state; | |
1005 | ||
e91f41ef | 1006 | current_state = sci_base_state_machine_get_state(&sci_port->state_machine); |
e2f8db50 DW |
1007 | |
1008 | if (current_state == SCI_BASE_PORT_STATE_RESETTING) { | |
e91f41ef PS |
1009 | /* if the port is still in the resetting state then the timeout |
1010 | * fired before the reset completed. | |
e2f8db50 | 1011 | */ |
e91f41ef | 1012 | port_state_machine_change(sci_port, SCI_BASE_PORT_STATE_FAILED); |
e2f8db50 | 1013 | } else if (current_state == SCI_BASE_PORT_STATE_STOPPED) { |
e91f41ef PS |
1014 | /* if the port is stopped then the start request failed In this |
1015 | * case stay in the stopped state. | |
e2f8db50 DW |
1016 | */ |
1017 | dev_err(sciport_to_dev(sci_port), | |
1018 | "%s: SCIC Port 0x%p failed to stop before tiemout.\n", | |
1019 | __func__, | |
1020 | sci_port); | |
1021 | } else if (current_state == SCI_BASE_PORT_STATE_STOPPING) { | |
e91f41ef PS |
1022 | /* if the port is still stopping then the stop has not completed */ |
1023 | isci_port_stop_complete(sci_port->owning_controller, | |
1024 | sci_port, | |
1025 | SCI_FAILURE_TIMEOUT); | |
e2f8db50 | 1026 | } else { |
e91f41ef | 1027 | /* The port is in the ready state and we have a timer |
e2f8db50 DW |
1028 | * reporting a timeout this should not happen. |
1029 | */ | |
1030 | dev_err(sciport_to_dev(sci_port), | |
1031 | "%s: SCIC Port 0x%p is processing a timeout operation " | |
e91f41ef | 1032 | "in state %d.\n", __func__, sci_port, current_state); |
e2f8db50 DW |
1033 | } |
1034 | } | |
1035 | ||
1036 | /* --------------------------------------------------------------------------- */ | |
1037 | ||
1038 | /** | |
1039 | * This function updates the hardwares VIIT entry for this port. | |
1040 | * | |
1041 | * | |
1042 | */ | |
1043 | static void scic_sds_port_update_viit_entry(struct scic_sds_port *sci_port) | |
1044 | { | |
1045 | struct sci_sas_address sas_address; | |
1046 | ||
1047 | scic_sds_port_get_sas_address(sci_port, &sas_address); | |
1048 | ||
1049 | writel(sas_address.high, | |
1050 | &sci_port->viit_registers->initiator_sas_address_hi); | |
1051 | writel(sas_address.low, | |
1052 | &sci_port->viit_registers->initiator_sas_address_lo); | |
1053 | ||
1054 | /* This value get cleared just in case its not already cleared */ | |
1055 | writel(0, &sci_port->viit_registers->reserved); | |
1056 | ||
1057 | /* We are required to update the status register last */ | |
1058 | writel(SCU_VIIT_ENTRY_ID_VIIT | | |
1059 | SCU_VIIT_IPPT_INITIATOR | | |
1060 | ((1 << sci_port->physical_port_index) << SCU_VIIT_ENTRY_LPVIE_SHIFT) | | |
1061 | SCU_VIIT_STATUS_ALL_VALID, | |
1062 | &sci_port->viit_registers->status); | |
1063 | } | |
1064 | ||
1065 | /** | |
1066 | * This method returns the maximum allowed speed for data transfers on this | |
1067 | * port. This maximum allowed speed evaluates to the maximum speed of the | |
1068 | * slowest phy in the port. | |
1069 | * @sci_port: This parameter specifies the port for which to retrieve the | |
1070 | * maximum allowed speed. | |
1071 | * | |
1072 | * This method returns the maximum negotiated speed of the slowest phy in the | |
1073 | * port. | |
1074 | */ | |
1075 | enum sas_linkrate scic_sds_port_get_max_allowed_speed( | |
1076 | struct scic_sds_port *sci_port) | |
1077 | { | |
1078 | u16 index; | |
1079 | enum sas_linkrate max_allowed_speed = SAS_LINK_RATE_6_0_GBPS; | |
1080 | struct scic_sds_phy *phy = NULL; | |
1081 | ||
1082 | /* | |
1083 | * Loop through all of the phys in this port and find the phy with the | |
1084 | * lowest maximum link rate. */ | |
1085 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
1086 | phy = sci_port->phy_table[index]; | |
1087 | if ( | |
1088 | (phy != NULL) | |
1089 | && (scic_sds_port_active_phy(sci_port, phy) == true) | |
1090 | && (phy->max_negotiated_speed < max_allowed_speed) | |
1091 | ) | |
1092 | max_allowed_speed = phy->max_negotiated_speed; | |
1093 | } | |
1094 | ||
1095 | return max_allowed_speed; | |
1096 | } | |
1097 | ||
1098 | static void scic_port_enable_broadcast_change_notification(struct scic_sds_port *port) | |
1099 | { | |
1100 | struct scic_sds_phy *phy; | |
1101 | u32 register_value; | |
1102 | u8 index; | |
1103 | ||
1104 | /* Loop through all of the phys to enable BCN. */ | |
1105 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
1106 | phy = port->phy_table[index]; | |
1107 | if (phy != NULL) { | |
1108 | register_value = | |
1109 | readl(&phy->link_layer_registers->link_layer_control); | |
1110 | ||
1111 | /* clear the bit by writing 1. */ | |
1112 | writel(register_value, | |
1113 | &phy->link_layer_registers->link_layer_control); | |
1114 | } | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * **************************************************************************** | |
1120 | * * READY SUBSTATE HANDLERS | |
1121 | * **************************************************************************** */ | |
1122 | ||
e2f8db50 DW |
1123 | /* |
1124 | * This method is the general ready substate complete io handler for the | |
1125 | * struct scic_sds_port object. This function decrments the outstanding request count | |
1126 | * for this port object. enum sci_status SCI_SUCCESS | |
1127 | */ | |
1128 | static enum sci_status scic_sds_port_ready_substate_complete_io_handler( | |
1129 | struct scic_sds_port *port, | |
1130 | struct scic_sds_remote_device *device, | |
1131 | struct scic_sds_request *io_request) | |
1132 | { | |
1133 | scic_sds_port_decrement_request_count(port); | |
1134 | ||
1135 | return SCI_SUCCESS; | |
1136 | } | |
1137 | ||
e2f8db50 DW |
1138 | /** |
1139 | * | |
1140 | * @sci_port: This is the struct scic_sds_port object that which has a phy that has | |
1141 | * gone link up. | |
1142 | * @sci_phy: This is the struct scic_sds_phy object that has gone link up. | |
1143 | * | |
1144 | * This method is the ready waiting substate link up handler for the | |
1145 | * struct scic_sds_port object. This methos will report the link up condition for | |
1146 | * this port and will transition to the ready operational substate. none | |
1147 | */ | |
1148 | static void scic_sds_port_ready_waiting_substate_link_up_handler( | |
1149 | struct scic_sds_port *sci_port, | |
1150 | struct scic_sds_phy *sci_phy) | |
1151 | { | |
1152 | /* | |
1153 | * Since this is the first phy going link up for the port we can just enable | |
1154 | * it and continue. */ | |
1155 | scic_sds_port_activate_phy(sci_port, sci_phy, true); | |
1156 | ||
e91f41ef PS |
1157 | port_state_machine_change(sci_port, |
1158 | SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); | |
e2f8db50 DW |
1159 | } |
1160 | ||
1161 | /* | |
1162 | * This method is the ready waiting substate start io handler for the | |
1163 | * struct scic_sds_port object. The port object can not accept new requests so the | |
1164 | * request is failed. enum sci_status SCI_FAILURE_INVALID_STATE | |
1165 | */ | |
1166 | static enum sci_status scic_sds_port_ready_waiting_substate_start_io_handler( | |
1167 | struct scic_sds_port *port, | |
1168 | struct scic_sds_remote_device *device, | |
1169 | struct scic_sds_request *io_request) | |
1170 | { | |
1171 | return SCI_FAILURE_INVALID_STATE; | |
1172 | } | |
1173 | ||
e2f8db50 DW |
1174 | /** |
1175 | * scic_sds_port_ready_operational_substate_link_up_handler() - | |
1176 | * @sci_port: This is the struct scic_sds_port object that which has a phy that has | |
1177 | * gone link up. | |
1178 | * @sci_phy: This is the struct scic_sds_phy object that has gone link up. | |
1179 | * | |
1180 | * This method is the ready operational substate link up handler for the | |
1181 | * struct scic_sds_port object. This function notifies the SCI User that the phy has | |
1182 | * gone link up. none | |
1183 | */ | |
1184 | static void scic_sds_port_ready_operational_substate_link_up_handler( | |
1185 | struct scic_sds_port *sci_port, | |
1186 | struct scic_sds_phy *sci_phy) | |
1187 | { | |
1188 | scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); | |
1189 | } | |
1190 | ||
1191 | /** | |
1192 | * scic_sds_port_ready_operational_substate_link_down_handler() - | |
1193 | * @sci_port: This is the struct scic_sds_port object that which has a phy that has | |
1194 | * gone link down. | |
1195 | * @sci_phy: This is the struct scic_sds_phy object that has gone link down. | |
1196 | * | |
1197 | * This method is the ready operational substate link down handler for the | |
1198 | * struct scic_sds_port object. This function notifies the SCI User that the phy has | |
1199 | * gone link down and if this is the last phy in the port the port will change | |
1200 | * state to the ready waiting substate. none | |
1201 | */ | |
1202 | static void scic_sds_port_ready_operational_substate_link_down_handler( | |
1203 | struct scic_sds_port *sci_port, | |
1204 | struct scic_sds_phy *sci_phy) | |
1205 | { | |
1206 | scic_sds_port_deactivate_phy(sci_port, sci_phy, true); | |
1207 | ||
1208 | /* | |
1209 | * If there are no active phys left in the port, then transition | |
1210 | * the port to the WAITING state until such time as a phy goes | |
1211 | * link up. */ | |
1212 | if (sci_port->active_phy_mask == 0) | |
e91f41ef PS |
1213 | port_state_machine_change(sci_port, |
1214 | SCIC_SDS_PORT_READY_SUBSTATE_WAITING); | |
e2f8db50 DW |
1215 | } |
1216 | ||
1217 | /* | |
1218 | * This method is the ready operational substate start io handler for the | |
1219 | * struct scic_sds_port object. This function incremetns the outstanding request | |
1220 | * count for this port object. enum sci_status SCI_SUCCESS | |
1221 | */ | |
1222 | static enum sci_status scic_sds_port_ready_operational_substate_start_io_handler( | |
1223 | struct scic_sds_port *port, | |
1224 | struct scic_sds_remote_device *device, | |
1225 | struct scic_sds_request *io_request) | |
1226 | { | |
1227 | port->started_request_count++; | |
1228 | return SCI_SUCCESS; | |
1229 | } | |
1230 | ||
e2f8db50 DW |
1231 | /** |
1232 | * scic_sds_port_ready_configuring_substate_complete_io_handler() - | |
1233 | * @port: This is the port that is being requested to complete the io request. | |
1234 | * @device: This is the device on which the io is completing. | |
1235 | * | |
1236 | * This method will decrement the outstanding request count for this port. If | |
1237 | * the request count goes to 0 then the port can be reprogrammed with its new | |
1238 | * phy data. | |
1239 | */ | |
1240 | static enum sci_status | |
1241 | scic_sds_port_ready_configuring_substate_complete_io_handler( | |
1242 | struct scic_sds_port *port, | |
1243 | struct scic_sds_remote_device *device, | |
1244 | struct scic_sds_request *io_request) | |
1245 | { | |
1246 | scic_sds_port_decrement_request_count(port); | |
1247 | ||
1248 | if (port->started_request_count == 0) { | |
e91f41ef PS |
1249 | port_state_machine_change(port, |
1250 | SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); | |
e2f8db50 DW |
1251 | } |
1252 | ||
1253 | return SCI_SUCCESS; | |
1254 | } | |
1255 | ||
1256 | static enum sci_status default_port_handler(struct scic_sds_port *sci_port, | |
1257 | const char *func) | |
1258 | { | |
1259 | dev_warn(sciport_to_dev(sci_port), | |
1260 | "%s: in wrong state: %d\n", func, | |
1261 | sci_base_state_machine_get_state(&sci_port->state_machine)); | |
1262 | return SCI_FAILURE_INVALID_STATE; | |
1263 | } | |
1264 | ||
e2f8db50 DW |
1265 | static void scic_sds_port_default_link_up_handler(struct scic_sds_port *sci_port, |
1266 | struct scic_sds_phy *sci_phy) | |
1267 | { | |
1268 | default_port_handler(sci_port, __func__); | |
1269 | } | |
1270 | ||
1271 | static void scic_sds_port_default_link_down_handler(struct scic_sds_port *sci_port, | |
1272 | struct scic_sds_phy *sci_phy) | |
1273 | { | |
1274 | default_port_handler(sci_port, __func__); | |
1275 | } | |
1276 | ||
1277 | static enum sci_status scic_sds_port_default_start_io_handler(struct scic_sds_port *sci_port, | |
1278 | struct scic_sds_remote_device *sci_dev, | |
1279 | struct scic_sds_request *sci_req) | |
1280 | { | |
1281 | return default_port_handler(sci_port, __func__); | |
1282 | } | |
1283 | ||
1284 | static enum sci_status scic_sds_port_default_complete_io_handler(struct scic_sds_port *sci_port, | |
1285 | struct scic_sds_remote_device *sci_dev, | |
1286 | struct scic_sds_request *sci_req) | |
1287 | { | |
1288 | return default_port_handler(sci_port, __func__); | |
1289 | } | |
1290 | ||
e2f8db50 DW |
1291 | /* |
1292 | * ****************************************************************************** | |
1293 | * * PORT STATE PRIVATE METHODS | |
1294 | * ****************************************************************************** */ | |
1295 | ||
1296 | /** | |
1297 | * | |
1298 | * @sci_port: This is the struct scic_sds_port object to suspend. | |
1299 | * | |
1300 | * This method will susped the port task scheduler for this port object. none | |
1301 | */ | |
1302 | static void | |
1303 | scic_sds_port_suspend_port_task_scheduler(struct scic_sds_port *port) | |
1304 | { | |
1305 | u32 pts_control_value; | |
1306 | ||
1307 | pts_control_value = readl(&port->port_task_scheduler_registers->control); | |
1308 | pts_control_value |= SCU_PTSxCR_GEN_BIT(SUSPEND); | |
1309 | writel(pts_control_value, &port->port_task_scheduler_registers->control); | |
1310 | } | |
1311 | ||
1312 | /** | |
1313 | * scic_sds_port_post_dummy_request() - post dummy/workaround request | |
1314 | * @sci_port: port to post task | |
1315 | * | |
1316 | * Prevent the hardware scheduler from posting new requests to the front | |
1317 | * of the scheduler queue causing a starvation problem for currently | |
1318 | * ongoing requests. | |
1319 | * | |
1320 | */ | |
1321 | static void scic_sds_port_post_dummy_request(struct scic_sds_port *sci_port) | |
1322 | { | |
1323 | u32 command; | |
1324 | struct scu_task_context *task_context; | |
1325 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1326 | u16 tci = sci_port->reserved_tci; | |
1327 | ||
1328 | task_context = scic_sds_controller_get_task_context_buffer(scic, tci); | |
1329 | ||
1330 | task_context->abort = 0; | |
1331 | ||
1332 | command = SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC | | |
1333 | sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | | |
1334 | tci; | |
1335 | ||
1336 | scic_sds_controller_post_request(scic, command); | |
1337 | } | |
1338 | ||
1339 | /** | |
1340 | * This routine will abort the dummy request. This will alow the hardware to | |
1341 | * power down parts of the silicon to save power. | |
1342 | * | |
1343 | * @sci_port: The port on which the task must be aborted. | |
1344 | * | |
1345 | */ | |
1346 | static void scic_sds_port_abort_dummy_request(struct scic_sds_port *sci_port) | |
1347 | { | |
1348 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1349 | u16 tci = sci_port->reserved_tci; | |
1350 | struct scu_task_context *tc; | |
1351 | u32 command; | |
1352 | ||
1353 | tc = scic_sds_controller_get_task_context_buffer(scic, tci); | |
1354 | ||
1355 | tc->abort = 1; | |
1356 | ||
1357 | command = SCU_CONTEXT_COMMAND_REQUEST_POST_TC_ABORT | | |
1358 | sci_port->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | | |
1359 | tci; | |
1360 | ||
1361 | scic_sds_controller_post_request(scic, command); | |
1362 | } | |
1363 | ||
1364 | /** | |
1365 | * | |
1366 | * @sci_port: This is the struct scic_sds_port object to resume. | |
1367 | * | |
1368 | * This method will resume the port task scheduler for this port object. none | |
1369 | */ | |
1370 | static void | |
1371 | scic_sds_port_resume_port_task_scheduler(struct scic_sds_port *port) | |
1372 | { | |
1373 | u32 pts_control_value; | |
1374 | ||
1375 | pts_control_value = readl(&port->port_task_scheduler_registers->control); | |
1376 | pts_control_value &= ~SCU_PTSxCR_GEN_BIT(SUSPEND); | |
1377 | writel(pts_control_value, &port->port_task_scheduler_registers->control); | |
1378 | } | |
1379 | ||
1380 | /* | |
1381 | * ****************************************************************************** | |
1382 | * * PORT READY SUBSTATE METHODS | |
1383 | * ****************************************************************************** */ | |
1384 | ||
1385 | /** | |
1386 | * | |
1387 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
1388 | * | |
1389 | * This method will perform the actions required by the struct scic_sds_port on | |
1390 | * entering the SCIC_SDS_PORT_READY_SUBSTATE_WAITING. This function checks the | |
1391 | * port for any ready phys. If there is at least one phy in a ready state then | |
1392 | * the port transitions to the ready operational substate. none | |
1393 | */ | |
1394 | static void scic_sds_port_ready_substate_waiting_enter(void *object) | |
1395 | { | |
1396 | struct scic_sds_port *sci_port = object; | |
1397 | ||
e91f41ef | 1398 | scic_sds_port_set_base_state_handlers( |
e2f8db50 DW |
1399 | sci_port, SCIC_SDS_PORT_READY_SUBSTATE_WAITING |
1400 | ); | |
1401 | ||
1402 | scic_sds_port_suspend_port_task_scheduler(sci_port); | |
1403 | ||
1404 | sci_port->not_ready_reason = SCIC_PORT_NOT_READY_NO_ACTIVE_PHYS; | |
1405 | ||
1406 | if (sci_port->active_phy_mask != 0) { | |
1407 | /* At least one of the phys on the port is ready */ | |
e91f41ef PS |
1408 | port_state_machine_change(sci_port, |
1409 | SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); | |
e2f8db50 DW |
1410 | } |
1411 | } | |
1412 | ||
1413 | /** | |
1414 | * | |
1415 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
1416 | * | |
1417 | * This function will perform the actions required by the struct scic_sds_port | |
1418 | * on entering the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function sets | |
1419 | * the state handlers for the port object, notifies the SCI User that the port | |
1420 | * is ready, and resumes port operations. none | |
1421 | */ | |
1422 | static void scic_sds_port_ready_substate_operational_enter(void *object) | |
1423 | { | |
1424 | u32 index; | |
1425 | struct scic_sds_port *sci_port = object; | |
1426 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1427 | struct isci_host *ihost = scic_to_ihost(scic); | |
1428 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
1429 | ||
e91f41ef | 1430 | scic_sds_port_set_base_state_handlers( |
e2f8db50 DW |
1431 | sci_port, |
1432 | SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); | |
1433 | ||
1434 | isci_port_ready(ihost, iport); | |
1435 | ||
1436 | for (index = 0; index < SCI_MAX_PHYS; index++) { | |
1437 | if (sci_port->phy_table[index]) { | |
1438 | writel(sci_port->physical_port_index, | |
1439 | &sci_port->port_pe_configuration_register[ | |
1440 | sci_port->phy_table[index]->phy_index]); | |
1441 | } | |
1442 | } | |
1443 | ||
1444 | scic_sds_port_update_viit_entry(sci_port); | |
1445 | ||
1446 | scic_sds_port_resume_port_task_scheduler(sci_port); | |
1447 | ||
1448 | /* | |
1449 | * Post the dummy task for the port so the hardware can schedule | |
1450 | * io correctly | |
1451 | */ | |
1452 | scic_sds_port_post_dummy_request(sci_port); | |
1453 | } | |
1454 | ||
e91f41ef PS |
1455 | static void scic_sds_port_invalidate_dummy_remote_node(struct scic_sds_port *sci_port) |
1456 | { | |
1457 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1458 | u8 phys_index = sci_port->physical_port_index; | |
1459 | union scu_remote_node_context *rnc; | |
1460 | u16 rni = sci_port->reserved_rni; | |
1461 | u32 command; | |
1462 | ||
1463 | rnc = &scic->remote_node_context_table[rni]; | |
1464 | ||
1465 | rnc->ssp.is_valid = false; | |
1466 | ||
1467 | /* ensure the preceding tc abort request has reached the | |
1468 | * controller and give it ample time to act before posting the rnc | |
1469 | * invalidate | |
1470 | */ | |
1471 | readl(&scic->smu_registers->interrupt_status); /* flush */ | |
1472 | udelay(10); | |
1473 | ||
1474 | command = SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE | | |
1475 | phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; | |
1476 | ||
1477 | scic_sds_controller_post_request(scic, command); | |
1478 | } | |
1479 | ||
e2f8db50 DW |
1480 | /** |
1481 | * | |
1482 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
1483 | * | |
1484 | * This method will perform the actions required by the struct scic_sds_port on | |
1485 | * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports | |
1486 | * the port not ready and suspends the port task scheduler. none | |
1487 | */ | |
1488 | static void scic_sds_port_ready_substate_operational_exit(void *object) | |
1489 | { | |
1490 | struct scic_sds_port *sci_port = object; | |
1491 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1492 | struct isci_host *ihost = scic_to_ihost(scic); | |
1493 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
1494 | ||
1495 | /* | |
1496 | * Kill the dummy task for this port if it has not yet posted | |
1497 | * the hardware will treat this as a NOP and just return abort | |
1498 | * complete. | |
1499 | */ | |
1500 | scic_sds_port_abort_dummy_request(sci_port); | |
1501 | ||
1502 | isci_port_not_ready(ihost, iport); | |
e91f41ef PS |
1503 | |
1504 | if (sci_port->ready_exit) | |
1505 | scic_sds_port_invalidate_dummy_remote_node(sci_port); | |
e2f8db50 DW |
1506 | } |
1507 | ||
1508 | /* | |
1509 | * ****************************************************************************** | |
1510 | * * PORT READY CONFIGURING METHODS | |
1511 | * ****************************************************************************** */ | |
1512 | ||
1513 | /** | |
1514 | * scic_sds_port_ready_substate_configuring_enter() - | |
1515 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
1516 | * | |
1517 | * This method will perform the actions required by the struct scic_sds_port on | |
1518 | * exiting the SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL. This function reports | |
1519 | * the port not ready and suspends the port task scheduler. none | |
1520 | */ | |
1521 | static void scic_sds_port_ready_substate_configuring_enter(void *object) | |
1522 | { | |
1523 | struct scic_sds_port *sci_port = object; | |
1524 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1525 | struct isci_host *ihost = scic_to_ihost(scic); | |
1526 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
1527 | ||
e91f41ef | 1528 | scic_sds_port_set_base_state_handlers( |
e2f8db50 DW |
1529 | sci_port, |
1530 | SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); | |
1531 | ||
1532 | if (sci_port->active_phy_mask == 0) { | |
1533 | isci_port_not_ready(ihost, iport); | |
1534 | ||
e91f41ef PS |
1535 | port_state_machine_change(sci_port, |
1536 | SCIC_SDS_PORT_READY_SUBSTATE_WAITING); | |
e2f8db50 | 1537 | } else if (sci_port->started_request_count == 0) |
e91f41ef PS |
1538 | port_state_machine_change(sci_port, |
1539 | SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL); | |
e2f8db50 DW |
1540 | } |
1541 | ||
1542 | static void scic_sds_port_ready_substate_configuring_exit(void *object) | |
1543 | { | |
1544 | struct scic_sds_port *sci_port = object; | |
1545 | ||
1546 | scic_sds_port_suspend_port_task_scheduler(sci_port); | |
e91f41ef PS |
1547 | if (sci_port->ready_exit) |
1548 | scic_sds_port_invalidate_dummy_remote_node(sci_port); | |
e2f8db50 DW |
1549 | } |
1550 | ||
1551 | /* --------------------------------------------------------------------------- */ | |
1552 | ||
e2f8db50 DW |
1553 | /** |
1554 | * | |
1555 | * @port: This is the struct scic_sds_port object on which the io request count will | |
1556 | * be decremented. | |
1557 | * @device: This is the struct scic_sds_remote_device object to which the io request | |
1558 | * is being directed. This parameter is not required to complete this | |
1559 | * operation. | |
1560 | * @io_request: This is the request that is being completed on this port | |
1561 | * object. This parameter is not required to complete this operation. | |
1562 | * | |
1563 | * This is a general complete io request handler for the struct scic_sds_port object. | |
1564 | * enum sci_status SCI_SUCCESS | |
1565 | */ | |
1566 | static enum sci_status scic_sds_port_general_complete_io_handler( | |
1567 | struct scic_sds_port *port, | |
1568 | struct scic_sds_remote_device *device, | |
1569 | struct scic_sds_request *io_request) | |
1570 | { | |
1571 | scic_sds_port_decrement_request_count(port); | |
1572 | ||
1573 | return SCI_SUCCESS; | |
1574 | } | |
1575 | ||
e2f8db50 DW |
1576 | /* |
1577 | * This method takes the struct scic_sds_port that is in a stopping state and handles | |
1578 | * the complete io request. Should the request count reach 0 then the port | |
1579 | * object will transition to the stopped state. enum sci_status SCI_SUCCESS | |
1580 | */ | |
1581 | static enum sci_status scic_sds_port_stopping_state_complete_io_handler( | |
1582 | struct scic_sds_port *sci_port, | |
1583 | struct scic_sds_remote_device *device, | |
1584 | struct scic_sds_request *io_request) | |
1585 | { | |
1586 | scic_sds_port_decrement_request_count(sci_port); | |
1587 | ||
e91f41ef PS |
1588 | if (sci_port->started_request_count == 0) |
1589 | port_state_machine_change(sci_port, | |
1590 | SCI_BASE_PORT_STATE_STOPPED); | |
e2f8db50 DW |
1591 | |
1592 | return SCI_SUCCESS; | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | * **************************************************************************** | |
1597 | * * RESETTING STATE HANDLERS | |
1598 | * **************************************************************************** */ | |
1599 | ||
e2f8db50 DW |
1600 | /* |
1601 | * This method will transition a failed port to its ready state. The port | |
1602 | * failed because a hard reset request timed out but at some time later one or | |
1603 | * more phys in the port became ready. enum sci_status SCI_SUCCESS | |
1604 | */ | |
1605 | static void scic_sds_port_reset_state_link_up_handler( | |
1606 | struct scic_sds_port *port, | |
1607 | struct scic_sds_phy *phy) | |
1608 | { | |
1609 | /* | |
1610 | * / @todo We should make sure that the phy that has gone link up is the same | |
1611 | * / one on which we sent the reset. It is possible that the phy on | |
1612 | * / which we sent the reset is not the one that has gone link up and we | |
1613 | * / want to make sure that phy being reset comes back. Consider the | |
1614 | * / case where a reset is sent but before the hardware processes the | |
1615 | * / reset it get a link up on the port because of a hot plug event. | |
1616 | * / because of the reset request this phy will go link down almost | |
1617 | * / immediately. */ | |
1618 | ||
1619 | /* | |
1620 | * In the resetting state we don't notify the user regarding | |
1621 | * link up and link down notifications. */ | |
1622 | scic_sds_port_general_link_up_handler(port, phy, false); | |
1623 | } | |
1624 | ||
1625 | /* | |
1626 | * This method process link down notifications that occur during a port reset | |
1627 | * operation. Link downs can occur during the reset operation. enum sci_status | |
1628 | * SCI_SUCCESS | |
1629 | */ | |
1630 | static void scic_sds_port_reset_state_link_down_handler( | |
1631 | struct scic_sds_port *port, | |
1632 | struct scic_sds_phy *phy) | |
1633 | { | |
1634 | /* | |
1635 | * In the resetting state we don't notify the user regarding | |
1636 | * link up and link down notifications. */ | |
1637 | scic_sds_port_deactivate_phy(port, phy, false); | |
1638 | } | |
1639 | ||
d76f71d9 PS |
1640 | enum sci_status scic_sds_port_start(struct scic_sds_port *sci_port) |
1641 | { | |
1642 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1643 | struct isci_host *ihost = scic_to_ihost(scic); | |
1644 | enum sci_status status = SCI_SUCCESS; | |
1645 | enum scic_sds_port_states state; | |
1646 | u32 phy_mask; | |
1647 | ||
1648 | state = sci_port->state_machine.current_state_id; | |
1649 | if (state != SCI_BASE_PORT_STATE_STOPPED) { | |
1650 | dev_warn(sciport_to_dev(sci_port), | |
1651 | "%s: in wrong state: %d\n", __func__, state); | |
1652 | return SCI_FAILURE_INVALID_STATE; | |
1653 | } | |
1654 | ||
1655 | if (sci_port->assigned_device_count > 0) { | |
1656 | /* TODO This is a start failure operation because | |
1657 | * there are still devices assigned to this port. | |
1658 | * There must be no devices assigned to a port on a | |
1659 | * start operation. | |
1660 | */ | |
1661 | return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; | |
1662 | } | |
1663 | ||
1664 | sci_port->timer_handle = | |
1665 | isci_timer_create(ihost, | |
1666 | sci_port, | |
1667 | scic_sds_port_timeout_handler); | |
1668 | ||
1669 | if (!sci_port->timer_handle) | |
1670 | return SCI_FAILURE_INSUFFICIENT_RESOURCES; | |
1671 | ||
1672 | if (sci_port->reserved_rni == SCU_DUMMY_INDEX) { | |
1673 | u16 rni = scic_sds_remote_node_table_allocate_remote_node( | |
1674 | &scic->available_remote_nodes, 1); | |
1675 | ||
1676 | if (rni != SCU_DUMMY_INDEX) | |
1677 | scic_sds_port_construct_dummy_rnc(sci_port, rni); | |
1678 | else | |
1679 | status = SCI_FAILURE_INSUFFICIENT_RESOURCES; | |
1680 | sci_port->reserved_rni = rni; | |
1681 | } | |
1682 | ||
1683 | if (sci_port->reserved_tci == SCU_DUMMY_INDEX) { | |
1684 | /* Allocate a TCI and remove the sequence nibble */ | |
1685 | u16 tci = scic_controller_allocate_io_tag(scic); | |
1686 | ||
1687 | if (tci != SCU_DUMMY_INDEX) | |
1688 | scic_sds_port_construct_dummy_task(sci_port, tci); | |
1689 | else | |
1690 | status = SCI_FAILURE_INSUFFICIENT_RESOURCES; | |
1691 | sci_port->reserved_tci = tci; | |
1692 | } | |
1693 | ||
1694 | if (status == SCI_SUCCESS) { | |
1695 | phy_mask = scic_sds_port_get_phys(sci_port); | |
1696 | ||
1697 | /* | |
1698 | * There are one or more phys assigned to this port. Make sure | |
1699 | * the port's phy mask is in fact legal and supported by the | |
1700 | * silicon. | |
1701 | */ | |
1702 | if (scic_sds_port_is_phy_mask_valid(sci_port, phy_mask) == true) { | |
1703 | port_state_machine_change(sci_port, | |
1704 | SCI_BASE_PORT_STATE_READY); | |
1705 | ||
1706 | return SCI_SUCCESS; | |
1707 | } | |
1708 | status = SCI_FAILURE; | |
1709 | } | |
1710 | ||
1711 | if (status != SCI_SUCCESS) | |
1712 | scic_sds_port_destroy_dummy_resources(sci_port); | |
1713 | ||
1714 | return status; | |
1715 | } | |
1716 | ||
8bc80d30 PS |
1717 | enum sci_status scic_sds_port_stop(struct scic_sds_port *sci_port) |
1718 | { | |
1719 | enum scic_sds_port_states state; | |
1720 | ||
1721 | state = sci_port->state_machine.current_state_id; | |
1722 | switch (state) { | |
1723 | case SCI_BASE_PORT_STATE_STOPPED: | |
1724 | return SCI_SUCCESS; | |
1725 | case SCIC_SDS_PORT_READY_SUBSTATE_WAITING: | |
1726 | case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL: | |
1727 | case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING: | |
1728 | case SCI_BASE_PORT_STATE_RESETTING: | |
1729 | port_state_machine_change(sci_port, | |
1730 | SCI_BASE_PORT_STATE_STOPPING); | |
1731 | return SCI_SUCCESS; | |
1732 | default: | |
1733 | dev_warn(sciport_to_dev(sci_port), | |
1734 | "%s: in wrong state: %d\n", __func__, state); | |
1735 | return SCI_FAILURE_INVALID_STATE; | |
1736 | } | |
1737 | } | |
1738 | ||
bd6713b4 PS |
1739 | static enum sci_status scic_port_hard_reset(struct scic_sds_port *sci_port, u32 timeout) |
1740 | { | |
1741 | enum sci_status status = SCI_FAILURE_INVALID_PHY; | |
1742 | struct scic_sds_phy *selected_phy = NULL; | |
1743 | enum scic_sds_port_states state; | |
1744 | u32 phy_index; | |
1745 | ||
1746 | state = sci_port->state_machine.current_state_id; | |
1747 | if (state != SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL) { | |
1748 | dev_warn(sciport_to_dev(sci_port), | |
1749 | "%s: in wrong state: %d\n", __func__, state); | |
1750 | return SCI_FAILURE_INVALID_STATE; | |
1751 | } | |
1752 | ||
1753 | /* Select a phy on which we can send the hard reset request. */ | |
1754 | for (phy_index = 0; phy_index < SCI_MAX_PHYS && !selected_phy; phy_index++) { | |
1755 | selected_phy = sci_port->phy_table[phy_index]; | |
1756 | if (selected_phy && | |
1757 | !scic_sds_port_active_phy(sci_port, selected_phy)) { | |
1758 | /* | |
1759 | * We found a phy but it is not ready select | |
1760 | * different phy | |
1761 | */ | |
1762 | selected_phy = NULL; | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | /* If we have a phy then go ahead and start the reset procedure */ | |
1767 | if (!selected_phy) | |
1768 | return status; | |
1769 | status = scic_sds_phy_reset(selected_phy); | |
1770 | ||
1771 | if (status != SCI_SUCCESS) | |
1772 | return status; | |
1773 | ||
1774 | isci_timer_start(sci_port->timer_handle, timeout); | |
1775 | sci_port->not_ready_reason = SCIC_PORT_NOT_READY_HARD_RESET_REQUESTED; | |
1776 | ||
1777 | port_state_machine_change(sci_port, | |
1778 | SCI_BASE_PORT_STATE_RESETTING); | |
1779 | return SCI_SUCCESS; | |
1780 | } | |
1781 | ||
1782 | /** | |
1783 | * scic_sds_port_add_phy() - | |
1784 | * @sci_port: This parameter specifies the port in which the phy will be added. | |
1785 | * @sci_phy: This parameter is the phy which is to be added to the port. | |
1786 | * | |
1787 | * This method will add a PHY to the selected port. This method returns an | |
1788 | * enum sci_status. SCI_SUCCESS the phy has been added to the port. Any other | |
1789 | * status is a failure to add the phy to the port. | |
1790 | */ | |
1791 | enum sci_status scic_sds_port_add_phy(struct scic_sds_port *sci_port, | |
1792 | struct scic_sds_phy *sci_phy) | |
1793 | { | |
1794 | enum sci_status status; | |
1795 | enum scic_sds_port_states state; | |
1796 | ||
1797 | state = sci_port->state_machine.current_state_id; | |
1798 | switch (state) { | |
1799 | case SCI_BASE_PORT_STATE_STOPPED: { | |
1800 | struct sci_sas_address port_sas_address; | |
1801 | ||
1802 | /* Read the port assigned SAS Address if there is one */ | |
1803 | scic_sds_port_get_sas_address(sci_port, &port_sas_address); | |
1804 | ||
1805 | if (port_sas_address.high != 0 && port_sas_address.low != 0) { | |
1806 | struct sci_sas_address phy_sas_address; | |
1807 | ||
1808 | /* Make sure that the PHY SAS Address matches the SAS Address | |
1809 | * for this port | |
1810 | */ | |
1811 | scic_sds_phy_get_sas_address(sci_phy, &phy_sas_address); | |
1812 | ||
1813 | if (port_sas_address.high != phy_sas_address.high || | |
1814 | port_sas_address.low != phy_sas_address.low) | |
1815 | return SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION; | |
1816 | } | |
1817 | return scic_sds_port_set_phy(sci_port, sci_phy); | |
1818 | } | |
1819 | case SCIC_SDS_PORT_READY_SUBSTATE_WAITING: | |
1820 | case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL: | |
1821 | status = scic_sds_port_set_phy(sci_port, sci_phy); | |
1822 | ||
1823 | if (status != SCI_SUCCESS) | |
1824 | return status; | |
1825 | ||
1826 | scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); | |
1827 | sci_port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; | |
1828 | port_state_machine_change(sci_port, SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); | |
1829 | ||
1830 | return status; | |
1831 | case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING: | |
1832 | status = scic_sds_port_set_phy(sci_port, sci_phy); | |
1833 | ||
1834 | if (status != SCI_SUCCESS) | |
1835 | return status; | |
1836 | scic_sds_port_general_link_up_handler(sci_port, sci_phy, true); | |
1837 | ||
1838 | /* Re-enter the configuring state since this may be the last phy in | |
1839 | * the port. | |
1840 | */ | |
1841 | port_state_machine_change(sci_port, | |
1842 | SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); | |
1843 | return SCI_SUCCESS; | |
1844 | default: | |
1845 | dev_warn(sciport_to_dev(sci_port), | |
1846 | "%s: in wrong state: %d\n", __func__, state); | |
1847 | return SCI_FAILURE_INVALID_STATE; | |
1848 | } | |
1849 | } | |
1850 | ||
1851 | /** | |
1852 | * scic_sds_port_remove_phy() - | |
1853 | * @sci_port: This parameter specifies the port in which the phy will be added. | |
1854 | * @sci_phy: This parameter is the phy which is to be added to the port. | |
1855 | * | |
1856 | * This method will remove the PHY from the selected PORT. This method returns | |
1857 | * an enum sci_status. SCI_SUCCESS the phy has been removed from the port. Any | |
1858 | * other status is a failure to add the phy to the port. | |
1859 | */ | |
1860 | enum sci_status scic_sds_port_remove_phy(struct scic_sds_port *sci_port, | |
1861 | struct scic_sds_phy *sci_phy) | |
1862 | { | |
1863 | enum sci_status status; | |
1864 | enum scic_sds_port_states state; | |
1865 | ||
1866 | state = sci_port->state_machine.current_state_id; | |
1867 | ||
1868 | switch (state) { | |
1869 | case SCI_BASE_PORT_STATE_STOPPED: | |
1870 | return scic_sds_port_clear_phy(sci_port, sci_phy); | |
1871 | case SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL: | |
1872 | status = scic_sds_port_clear_phy(sci_port, sci_phy); | |
1873 | if (status != SCI_SUCCESS) | |
1874 | return status; | |
1875 | ||
1876 | scic_sds_port_deactivate_phy(sci_port, sci_phy, true); | |
1877 | sci_port->not_ready_reason = SCIC_PORT_NOT_READY_RECONFIGURING; | |
1878 | port_state_machine_change(sci_port, | |
1879 | SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); | |
1880 | return SCI_SUCCESS; | |
1881 | case SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING: | |
1882 | status = scic_sds_port_clear_phy(sci_port, sci_phy); | |
1883 | ||
1884 | if (status != SCI_SUCCESS) | |
1885 | return status; | |
1886 | scic_sds_port_deactivate_phy(sci_port, sci_phy, true); | |
1887 | ||
1888 | /* Re-enter the configuring state since this may be the last phy in | |
1889 | * the port | |
1890 | */ | |
1891 | port_state_machine_change(sci_port, | |
1892 | SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING); | |
1893 | ||
1894 | return SCI_SUCCESS; | |
1895 | default: | |
1896 | dev_warn(sciport_to_dev(sci_port), | |
1897 | "%s: in wrong state: %d\n", __func__, state); | |
1898 | return SCI_FAILURE_INVALID_STATE; | |
1899 | } | |
1900 | } | |
1901 | ||
c777c26c PS |
1902 | static struct scic_sds_port_state_handler scic_sds_port_state_handler_table[] = { |
1903 | [SCI_BASE_PORT_STATE_STOPPED] = { | |
c777c26c PS |
1904 | .link_up_handler = scic_sds_port_default_link_up_handler, |
1905 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
1906 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
1907 | .complete_io_handler = scic_sds_port_default_complete_io_handler | |
e2f8db50 | 1908 | }, |
c777c26c | 1909 | [SCI_BASE_PORT_STATE_STOPPING] = { |
c777c26c PS |
1910 | .link_up_handler = scic_sds_port_default_link_up_handler, |
1911 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
1912 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
1913 | .complete_io_handler = scic_sds_port_stopping_state_complete_io_handler | |
e2f8db50 | 1914 | }, |
c777c26c | 1915 | [SCI_BASE_PORT_STATE_READY] = { |
c777c26c PS |
1916 | .link_up_handler = scic_sds_port_default_link_up_handler, |
1917 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
1918 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
1919 | .complete_io_handler = scic_sds_port_general_complete_io_handler | |
e2f8db50 | 1920 | }, |
e91f41ef | 1921 | [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = { |
e91f41ef PS |
1922 | .link_up_handler = scic_sds_port_ready_waiting_substate_link_up_handler, |
1923 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
1924 | .start_io_handler = scic_sds_port_ready_waiting_substate_start_io_handler, | |
1925 | .complete_io_handler = scic_sds_port_ready_substate_complete_io_handler, | |
1926 | }, | |
1927 | [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = { | |
e91f41ef PS |
1928 | .link_up_handler = scic_sds_port_ready_operational_substate_link_up_handler, |
1929 | .link_down_handler = scic_sds_port_ready_operational_substate_link_down_handler, | |
1930 | .start_io_handler = scic_sds_port_ready_operational_substate_start_io_handler, | |
1931 | .complete_io_handler = scic_sds_port_ready_substate_complete_io_handler, | |
1932 | }, | |
1933 | [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = { | |
e91f41ef PS |
1934 | .link_up_handler = scic_sds_port_default_link_up_handler, |
1935 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
1936 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
1937 | .complete_io_handler = scic_sds_port_ready_configuring_substate_complete_io_handler | |
1938 | }, | |
c777c26c | 1939 | [SCI_BASE_PORT_STATE_RESETTING] = { |
c777c26c PS |
1940 | .link_up_handler = scic_sds_port_reset_state_link_up_handler, |
1941 | .link_down_handler = scic_sds_port_reset_state_link_down_handler, | |
1942 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
1943 | .complete_io_handler = scic_sds_port_general_complete_io_handler | |
e2f8db50 | 1944 | }, |
c777c26c | 1945 | [SCI_BASE_PORT_STATE_FAILED] = { |
c777c26c PS |
1946 | .link_up_handler = scic_sds_port_default_link_up_handler, |
1947 | .link_down_handler = scic_sds_port_default_link_down_handler, | |
1948 | .start_io_handler = scic_sds_port_default_start_io_handler, | |
1949 | .complete_io_handler = scic_sds_port_general_complete_io_handler | |
e2f8db50 DW |
1950 | } |
1951 | }; | |
1952 | ||
1953 | /* | |
1954 | * ****************************************************************************** | |
1955 | * * PORT STATE PRIVATE METHODS | |
1956 | * ****************************************************************************** */ | |
1957 | ||
1958 | /** | |
1959 | * | |
1960 | * @sci_port: This is the port object which to suspend. | |
1961 | * | |
1962 | * This method will enable the SCU Port Task Scheduler for this port object but | |
1963 | * will leave the port task scheduler in a suspended state. none | |
1964 | */ | |
1965 | static void | |
1966 | scic_sds_port_enable_port_task_scheduler(struct scic_sds_port *port) | |
1967 | { | |
1968 | u32 pts_control_value; | |
1969 | ||
1970 | pts_control_value = readl(&port->port_task_scheduler_registers->control); | |
1971 | pts_control_value |= SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND); | |
1972 | writel(pts_control_value, &port->port_task_scheduler_registers->control); | |
1973 | } | |
1974 | ||
1975 | /** | |
1976 | * | |
1977 | * @sci_port: This is the port object which to resume. | |
1978 | * | |
1979 | * This method will disable the SCU port task scheduler for this port object. | |
1980 | * none | |
1981 | */ | |
1982 | static void | |
1983 | scic_sds_port_disable_port_task_scheduler(struct scic_sds_port *port) | |
1984 | { | |
1985 | u32 pts_control_value; | |
1986 | ||
1987 | pts_control_value = readl(&port->port_task_scheduler_registers->control); | |
1988 | pts_control_value &= | |
1989 | ~(SCU_PTSxCR_GEN_BIT(ENABLE) | SCU_PTSxCR_GEN_BIT(SUSPEND)); | |
1990 | writel(pts_control_value, &port->port_task_scheduler_registers->control); | |
1991 | } | |
1992 | ||
1993 | static void scic_sds_port_post_dummy_remote_node(struct scic_sds_port *sci_port) | |
1994 | { | |
1995 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
1996 | u8 phys_index = sci_port->physical_port_index; | |
1997 | union scu_remote_node_context *rnc; | |
1998 | u16 rni = sci_port->reserved_rni; | |
1999 | u32 command; | |
2000 | ||
2001 | rnc = &scic->remote_node_context_table[rni]; | |
2002 | rnc->ssp.is_valid = true; | |
2003 | ||
2004 | command = SCU_CONTEXT_COMMAND_POST_RNC_32 | | |
2005 | phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; | |
2006 | ||
2007 | scic_sds_controller_post_request(scic, command); | |
2008 | ||
2009 | /* ensure hardware has seen the post rnc command and give it | |
2010 | * ample time to act before sending the suspend | |
2011 | */ | |
2012 | readl(&scic->smu_registers->interrupt_status); /* flush */ | |
2013 | udelay(10); | |
2014 | ||
2015 | command = SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX | | |
2016 | phys_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT | rni; | |
2017 | ||
2018 | scic_sds_controller_post_request(scic, command); | |
2019 | } | |
2020 | ||
e2f8db50 DW |
2021 | /* |
2022 | * ****************************************************************************** | |
2023 | * * PORT STATE METHODS | |
2024 | * ****************************************************************************** */ | |
2025 | ||
2026 | /** | |
2027 | * | |
2028 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2029 | * | |
2030 | * This method will perform the actions required by the struct scic_sds_port on | |
2031 | * entering the SCI_BASE_PORT_STATE_STOPPED. This function sets the stopped | |
2032 | * state handlers for the struct scic_sds_port object and disables the port task | |
2033 | * scheduler in the hardware. none | |
2034 | */ | |
2035 | static void scic_sds_port_stopped_state_enter(void *object) | |
2036 | { | |
2037 | struct scic_sds_port *sci_port = object; | |
2038 | ||
2039 | scic_sds_port_set_base_state_handlers( | |
2040 | sci_port, SCI_BASE_PORT_STATE_STOPPED | |
2041 | ); | |
2042 | ||
2043 | if ( | |
2044 | SCI_BASE_PORT_STATE_STOPPING | |
2045 | == sci_port->state_machine.previous_state_id | |
2046 | ) { | |
2047 | /* | |
2048 | * If we enter this state becasuse of a request to stop | |
2049 | * the port then we want to disable the hardwares port | |
2050 | * task scheduler. */ | |
2051 | scic_sds_port_disable_port_task_scheduler(sci_port); | |
2052 | } | |
2053 | } | |
2054 | ||
2055 | /** | |
2056 | * | |
2057 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2058 | * | |
2059 | * This method will perform the actions required by the struct scic_sds_port on | |
2060 | * exiting the SCI_BASE_STATE_STOPPED. This function enables the SCU hardware | |
2061 | * port task scheduler. none | |
2062 | */ | |
2063 | static void scic_sds_port_stopped_state_exit(void *object) | |
2064 | { | |
2065 | struct scic_sds_port *sci_port = object; | |
2066 | ||
2067 | /* Enable and suspend the port task scheduler */ | |
2068 | scic_sds_port_enable_port_task_scheduler(sci_port); | |
2069 | } | |
2070 | ||
2071 | /** | |
2072 | * scic_sds_port_ready_state_enter - | |
2073 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2074 | * | |
2075 | * This method will perform the actions required by the struct scic_sds_port on | |
2076 | * entering the SCI_BASE_PORT_STATE_READY. This function sets the ready state | |
2077 | * handlers for the struct scic_sds_port object, reports the port object as | |
2078 | * not ready and starts the ready substate machine. none | |
2079 | */ | |
2080 | static void scic_sds_port_ready_state_enter(void *object) | |
2081 | { | |
2082 | struct scic_sds_port *sci_port = object; | |
2083 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
2084 | struct isci_host *ihost = scic_to_ihost(scic); | |
2085 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
2086 | u32 prev_state; | |
2087 | ||
2088 | /* Put the ready state handlers in place though they will not be there long */ | |
2089 | scic_sds_port_set_base_state_handlers(sci_port, SCI_BASE_PORT_STATE_READY); | |
2090 | ||
2091 | prev_state = sci_port->state_machine.previous_state_id; | |
2092 | if (prev_state == SCI_BASE_PORT_STATE_RESETTING) | |
2093 | isci_port_hard_reset_complete(iport, SCI_SUCCESS); | |
2094 | else | |
2095 | isci_port_not_ready(ihost, iport); | |
2096 | ||
2097 | /* Post and suspend the dummy remote node context for this port. */ | |
2098 | scic_sds_port_post_dummy_remote_node(sci_port); | |
2099 | ||
2100 | /* Start the ready substate machine */ | |
e91f41ef PS |
2101 | port_state_machine_change(sci_port, |
2102 | SCIC_SDS_PORT_READY_SUBSTATE_WAITING); | |
e2f8db50 DW |
2103 | } |
2104 | ||
2105 | /** | |
2106 | * | |
2107 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2108 | * | |
2109 | * This method will perform the actions required by the struct scic_sds_port on | |
2110 | * entering the SCI_BASE_PORT_STATE_RESETTING. This function sets the resetting | |
2111 | * state handlers for the struct scic_sds_port object. none | |
2112 | */ | |
2113 | static void scic_sds_port_resetting_state_enter(void *object) | |
2114 | { | |
2115 | struct scic_sds_port *sci_port = object; | |
2116 | ||
2117 | scic_sds_port_set_base_state_handlers( | |
2118 | sci_port, SCI_BASE_PORT_STATE_RESETTING | |
2119 | ); | |
2120 | } | |
2121 | ||
2122 | /** | |
2123 | * | |
2124 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2125 | * | |
2126 | * This function will perform the actions required by the | |
2127 | * struct scic_sds_port on | |
2128 | * exiting the SCI_BASE_STATE_RESETTING. This function does nothing. none | |
2129 | */ | |
2130 | static inline void scic_sds_port_resetting_state_exit(void *object) | |
2131 | { | |
2132 | struct scic_sds_port *sci_port = object; | |
2133 | ||
2134 | isci_timer_stop(sci_port->timer_handle); | |
2135 | } | |
2136 | ||
2137 | /** | |
2138 | * | |
2139 | * @object: This is the void object which is cast to a | |
2140 | * struct scic_sds_port object. | |
2141 | * | |
2142 | * This method will perform the actions required by the struct scic_sds_port on | |
2143 | * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping | |
2144 | * state handlers for the struct scic_sds_port object. none | |
2145 | */ | |
2146 | static void scic_sds_port_stopping_state_enter(void *object) | |
2147 | { | |
2148 | struct scic_sds_port *sci_port = object; | |
2149 | ||
2150 | scic_sds_port_set_base_state_handlers( | |
2151 | sci_port, SCI_BASE_PORT_STATE_STOPPING | |
2152 | ); | |
2153 | } | |
2154 | ||
2155 | /** | |
2156 | * | |
2157 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2158 | * | |
2159 | * This function will perform the actions required by the | |
2160 | * struct scic_sds_port on | |
2161 | * exiting the SCI_BASE_STATE_STOPPING. This function does nothing. none | |
2162 | */ | |
2163 | static inline void | |
2164 | scic_sds_port_stopping_state_exit(void *object) | |
2165 | { | |
2166 | struct scic_sds_port *sci_port = object; | |
2167 | ||
2168 | isci_timer_stop(sci_port->timer_handle); | |
2169 | ||
2170 | scic_sds_port_destroy_dummy_resources(sci_port); | |
2171 | } | |
2172 | ||
2173 | /** | |
2174 | * | |
2175 | * @object: This is the object which is cast to a struct scic_sds_port object. | |
2176 | * | |
2177 | * This function will perform the actions required by the | |
2178 | * struct scic_sds_port on | |
2179 | * entering the SCI_BASE_PORT_STATE_STOPPING. This function sets the stopping | |
2180 | * state handlers for the struct scic_sds_port object. none | |
2181 | */ | |
2182 | static void scic_sds_port_failed_state_enter(void *object) | |
2183 | { | |
2184 | struct scic_sds_port *sci_port = object; | |
2185 | struct isci_port *iport = sci_port_to_iport(sci_port); | |
2186 | ||
2187 | scic_sds_port_set_base_state_handlers(sci_port, | |
2188 | SCI_BASE_PORT_STATE_FAILED); | |
2189 | ||
2190 | isci_port_hard_reset_complete(iport, SCI_FAILURE_TIMEOUT); | |
2191 | } | |
2192 | ||
2193 | /* --------------------------------------------------------------------------- */ | |
2194 | ||
2195 | static const struct sci_base_state scic_sds_port_state_table[] = { | |
2196 | [SCI_BASE_PORT_STATE_STOPPED] = { | |
2197 | .enter_state = scic_sds_port_stopped_state_enter, | |
2198 | .exit_state = scic_sds_port_stopped_state_exit | |
2199 | }, | |
2200 | [SCI_BASE_PORT_STATE_STOPPING] = { | |
2201 | .enter_state = scic_sds_port_stopping_state_enter, | |
2202 | .exit_state = scic_sds_port_stopping_state_exit | |
2203 | }, | |
2204 | [SCI_BASE_PORT_STATE_READY] = { | |
2205 | .enter_state = scic_sds_port_ready_state_enter, | |
e91f41ef PS |
2206 | }, |
2207 | [SCIC_SDS_PORT_READY_SUBSTATE_WAITING] = { | |
2208 | .enter_state = scic_sds_port_ready_substate_waiting_enter, | |
2209 | }, | |
2210 | [SCIC_SDS_PORT_READY_SUBSTATE_OPERATIONAL] = { | |
2211 | .enter_state = scic_sds_port_ready_substate_operational_enter, | |
2212 | .exit_state = scic_sds_port_ready_substate_operational_exit | |
2213 | }, | |
2214 | [SCIC_SDS_PORT_READY_SUBSTATE_CONFIGURING] = { | |
2215 | .enter_state = scic_sds_port_ready_substate_configuring_enter, | |
2216 | .exit_state = scic_sds_port_ready_substate_configuring_exit | |
e2f8db50 DW |
2217 | }, |
2218 | [SCI_BASE_PORT_STATE_RESETTING] = { | |
2219 | .enter_state = scic_sds_port_resetting_state_enter, | |
2220 | .exit_state = scic_sds_port_resetting_state_exit | |
2221 | }, | |
2222 | [SCI_BASE_PORT_STATE_FAILED] = { | |
2223 | .enter_state = scic_sds_port_failed_state_enter, | |
2224 | } | |
2225 | }; | |
2226 | ||
2227 | void scic_sds_port_construct(struct scic_sds_port *sci_port, u8 index, | |
2228 | struct scic_sds_controller *scic) | |
2229 | { | |
2230 | sci_base_state_machine_construct(&sci_port->state_machine, | |
2231 | sci_port, | |
2232 | scic_sds_port_state_table, | |
2233 | SCI_BASE_PORT_STATE_STOPPED); | |
2234 | ||
2235 | sci_base_state_machine_start(&sci_port->state_machine); | |
2236 | ||
e2f8db50 DW |
2237 | sci_port->logical_port_index = SCIC_SDS_DUMMY_PORT; |
2238 | sci_port->physical_port_index = index; | |
2239 | sci_port->active_phy_mask = 0; | |
e91f41ef | 2240 | sci_port->ready_exit = false; |
e2f8db50 DW |
2241 | |
2242 | sci_port->owning_controller = scic; | |
2243 | ||
2244 | sci_port->started_request_count = 0; | |
2245 | sci_port->assigned_device_count = 0; | |
2246 | ||
2247 | sci_port->reserved_rni = SCU_DUMMY_INDEX; | |
2248 | sci_port->reserved_tci = SCU_DUMMY_INDEX; | |
2249 | ||
2250 | sci_port->timer_handle = NULL; | |
2251 | sci_port->port_task_scheduler_registers = NULL; | |
2252 | ||
2253 | for (index = 0; index < SCI_MAX_PHYS; index++) | |
2254 | sci_port->phy_table[index] = NULL; | |
2255 | } | |
2256 | ||
2257 | void isci_port_init(struct isci_port *iport, struct isci_host *ihost, int index) | |
2258 | { | |
2259 | INIT_LIST_HEAD(&iport->remote_dev_list); | |
2260 | INIT_LIST_HEAD(&iport->domain_dev_list); | |
2261 | spin_lock_init(&iport->state_lock); | |
2262 | init_completion(&iport->start_complete); | |
2263 | iport->isci_host = ihost; | |
2264 | isci_port_change_state(iport, isci_freed); | |
2265 | } | |
2266 | ||
2267 | /** | |
2268 | * isci_port_get_state() - This function gets the status of the port object. | |
2269 | * @isci_port: This parameter points to the isci_port object | |
2270 | * | |
2271 | * status of the object as a isci_status enum. | |
2272 | */ | |
2273 | enum isci_status isci_port_get_state( | |
2274 | struct isci_port *isci_port) | |
2275 | { | |
2276 | return isci_port->status; | |
2277 | } | |
2278 | ||
2279 | static void isci_port_bc_change_received(struct isci_host *ihost, | |
2280 | struct scic_sds_port *sci_port, | |
2281 | struct scic_sds_phy *sci_phy) | |
2282 | { | |
2283 | struct isci_phy *iphy = sci_phy_to_iphy(sci_phy); | |
2284 | ||
2285 | dev_dbg(&ihost->pdev->dev, "%s: iphy = %p, sas_phy = %p\n", | |
2286 | __func__, iphy, &iphy->sas_phy); | |
2287 | ||
2288 | ihost->sas_ha.notify_port_event(&iphy->sas_phy, PORTE_BROADCAST_RCVD); | |
2289 | scic_port_enable_broadcast_change_notification(sci_port); | |
2290 | } | |
2291 | ||
2292 | void scic_sds_port_broadcast_change_received( | |
2293 | struct scic_sds_port *sci_port, | |
2294 | struct scic_sds_phy *sci_phy) | |
2295 | { | |
2296 | struct scic_sds_controller *scic = sci_port->owning_controller; | |
2297 | struct isci_host *ihost = scic_to_ihost(scic); | |
2298 | ||
2299 | /* notify the user. */ | |
2300 | isci_port_bc_change_received(ihost, sci_port, sci_phy); | |
2301 | } | |
2302 | ||
2303 | int isci_port_perform_hard_reset(struct isci_host *ihost, struct isci_port *iport, | |
2304 | struct isci_phy *iphy) | |
2305 | { | |
2306 | unsigned long flags; | |
2307 | enum sci_status status; | |
2308 | int ret = TMF_RESP_FUNC_COMPLETE; | |
2309 | ||
2310 | dev_dbg(&ihost->pdev->dev, "%s: iport = %p\n", | |
2311 | __func__, iport); | |
2312 | ||
2313 | init_completion(&iport->hard_reset_complete); | |
2314 | ||
2315 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
2316 | ||
2317 | #define ISCI_PORT_RESET_TIMEOUT SCIC_SDS_SIGNATURE_FIS_TIMEOUT | |
2318 | status = scic_port_hard_reset(&iport->sci, ISCI_PORT_RESET_TIMEOUT); | |
2319 | ||
2320 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
2321 | ||
2322 | if (status == SCI_SUCCESS) { | |
2323 | wait_for_completion(&iport->hard_reset_complete); | |
2324 | ||
2325 | dev_dbg(&ihost->pdev->dev, | |
2326 | "%s: iport = %p; hard reset completion\n", | |
2327 | __func__, iport); | |
2328 | ||
2329 | if (iport->hard_reset_status != SCI_SUCCESS) | |
2330 | ret = TMF_RESP_FUNC_FAILED; | |
2331 | } else { | |
2332 | ret = TMF_RESP_FUNC_FAILED; | |
2333 | ||
2334 | dev_err(&ihost->pdev->dev, | |
2335 | "%s: iport = %p; scic_port_hard_reset call" | |
2336 | " failed 0x%x\n", | |
2337 | __func__, iport, status); | |
2338 | ||
2339 | } | |
2340 | ||
2341 | /* If the hard reset for the port has failed, consider this | |
2342 | * the same as link failures on all phys in the port. | |
2343 | */ | |
2344 | if (ret != TMF_RESP_FUNC_COMPLETE) { | |
2345 | dev_err(&ihost->pdev->dev, | |
2346 | "%s: iport = %p; hard reset failed " | |
2347 | "(0x%x) - sending link down to libsas for phy %p\n", | |
2348 | __func__, iport, iport->hard_reset_status, iphy); | |
2349 | ||
2350 | isci_port_link_down(ihost, iphy, iport); | |
2351 | } | |
2352 | ||
2353 | return ret; | |
2354 | } | |
2355 | ||
2356 | /** | |
2357 | * isci_port_deformed() - This function is called by libsas when a port becomes | |
2358 | * inactive. | |
2359 | * @phy: This parameter specifies the libsas phy with the inactive port. | |
2360 | * | |
2361 | */ | |
2362 | void isci_port_deformed(struct asd_sas_phy *phy) | |
2363 | { | |
2364 | pr_debug("%s: sas_phy = %p\n", __func__, phy); | |
2365 | } | |
2366 | ||
2367 | /** | |
2368 | * isci_port_formed() - This function is called by libsas when a port becomes | |
2369 | * active. | |
2370 | * @phy: This parameter specifies the libsas phy with the active port. | |
2371 | * | |
2372 | */ | |
2373 | void isci_port_formed(struct asd_sas_phy *phy) | |
2374 | { | |
2375 | pr_debug("%s: sas_phy = %p, sas_port = %p\n", __func__, phy, phy->port); | |
09d7da13 | 2376 | } |