Commit | Line | Data |
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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 | ||
cc9203bf | 56 | #include "host.h" |
3bff9d54 | 57 | #include "state_machine.h" |
88f3b62a DW |
58 | #include "remote_device.h" |
59 | #include "remote_node_context.h" | |
6f231dda DW |
60 | #include "scu_event_codes.h" |
61 | #include "scu_task_context.h" | |
62 | ||
6f231dda DW |
63 | |
64 | /** | |
65 | * | |
e2023b87 | 66 | * @sci_rnc: The RNC for which the is posted request is being made. |
6f231dda DW |
67 | * |
68 | * This method will return true if the RNC is not in the initial state. In all | |
69 | * other states the RNC is considered active and this will return true. The | |
70 | * destroy request of the state machine drives the RNC back to the initial | |
71 | * state. If the state machine changes then this routine will also have to be | |
72 | * changed. bool true if the state machine is not in the initial state false if | |
73 | * the state machine is in the initial state | |
74 | */ | |
75 | ||
76 | /** | |
77 | * | |
e2023b87 | 78 | * @sci_rnc: The state of the remote node context object to check. |
6f231dda DW |
79 | * |
80 | * This method will return true if the remote node context is in a READY state | |
81 | * otherwise it will return false bool true if the remote node context is in | |
82 | * the ready state. false if the remote node context is not in the ready state. | |
83 | */ | |
84 | bool scic_sds_remote_node_context_is_ready( | |
e2023b87 | 85 | struct scic_sds_remote_node_context *sci_rnc) |
6f231dda | 86 | { |
e2023b87 | 87 | u32 current_state = sci_base_state_machine_get_state(&sci_rnc->state_machine); |
6f231dda DW |
88 | |
89 | if (current_state == SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE) { | |
90 | return true; | |
91 | } | |
92 | ||
93 | return false; | |
94 | } | |
95 | ||
96 | /** | |
97 | * | |
e2023b87 | 98 | * @sci_dev: The remote device to use to construct the RNC buffer. |
6f231dda DW |
99 | * @rnc: The buffer into which the remote device data will be copied. |
100 | * | |
101 | * This method will construct the RNC buffer for this remote device object. none | |
102 | */ | |
35173d57 | 103 | static void scic_sds_remote_node_context_construct_buffer( |
e2023b87 | 104 | struct scic_sds_remote_node_context *sci_rnc) |
6f231dda | 105 | { |
9614395e | 106 | struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc); |
a1a113b0 | 107 | struct domain_device *dev = sci_dev_to_domain(sci_dev); |
1f4fa1f9 | 108 | int rni = sci_rnc->remote_node_index; |
a1a113b0 | 109 | union scu_remote_node_context *rnc; |
e2023b87 | 110 | struct scic_sds_controller *scic; |
a3d568f0 | 111 | __le64 sas_addr; |
6f231dda | 112 | |
9614395e | 113 | scic = scic_sds_remote_device_get_controller(sci_dev); |
1f4fa1f9 | 114 | rnc = scic_sds_controller_get_remote_node_context_buffer(scic, rni); |
6f231dda | 115 | |
9614395e DW |
116 | memset(rnc, 0, sizeof(union scu_remote_node_context) |
117 | * scic_sds_remote_device_node_count(sci_dev)); | |
6f231dda | 118 | |
1f4fa1f9 | 119 | rnc->ssp.remote_node_index = rni; |
9614395e | 120 | rnc->ssp.remote_node_port_width = sci_dev->device_port_width; |
1f4fa1f9 | 121 | rnc->ssp.logical_port_index = sci_dev->owning_port->physical_port_index; |
6f231dda | 122 | |
a3d568f0 DW |
123 | /* sas address is __be64, context ram format is __le64 */ |
124 | sas_addr = cpu_to_le64(SAS_ADDR(dev->sas_addr)); | |
125 | rnc->ssp.remote_sas_address_hi = upper_32_bits(sas_addr); | |
126 | rnc->ssp.remote_sas_address_lo = lower_32_bits(sas_addr); | |
6f231dda DW |
127 | |
128 | rnc->ssp.nexus_loss_timer_enable = true; | |
129 | rnc->ssp.check_bit = false; | |
130 | rnc->ssp.is_valid = false; | |
131 | rnc->ssp.is_remote_node_context = true; | |
132 | rnc->ssp.function_number = 0; | |
133 | ||
134 | rnc->ssp.arbitration_wait_time = 0; | |
135 | ||
a1a113b0 | 136 | if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { |
6f231dda | 137 | rnc->ssp.connection_occupancy_timeout = |
e2023b87 | 138 | scic->user_parameters.sds1.stp_max_occupancy_timeout; |
6f231dda | 139 | rnc->ssp.connection_inactivity_timeout = |
e2023b87 | 140 | scic->user_parameters.sds1.stp_inactivity_timeout; |
6f231dda DW |
141 | } else { |
142 | rnc->ssp.connection_occupancy_timeout = | |
e2023b87 | 143 | scic->user_parameters.sds1.ssp_max_occupancy_timeout; |
6f231dda | 144 | rnc->ssp.connection_inactivity_timeout = |
e2023b87 | 145 | scic->user_parameters.sds1.ssp_inactivity_timeout; |
6f231dda DW |
146 | } |
147 | ||
148 | rnc->ssp.initial_arbitration_wait_time = 0; | |
149 | ||
150 | /* Open Address Frame Parameters */ | |
9614395e | 151 | rnc->ssp.oaf_connection_rate = sci_dev->connection_rate; |
6f231dda DW |
152 | rnc->ssp.oaf_features = 0; |
153 | rnc->ssp.oaf_source_zone_group = 0; | |
154 | rnc->ssp.oaf_more_compatibility_features = 0; | |
155 | } | |
156 | ||
157 | /** | |
158 | * | |
e2023b87 DJ |
159 | * @sci_rnc: |
160 | * @callback: | |
6f231dda DW |
161 | * @callback_parameter: |
162 | * | |
163 | * This method will setup the remote node context object so it will transition | |
164 | * to its ready state. If the remote node context is already setup to | |
165 | * transition to its final state then this function does nothing. none | |
166 | */ | |
167 | static void scic_sds_remote_node_context_setup_to_resume( | |
e2023b87 DJ |
168 | struct scic_sds_remote_node_context *sci_rnc, |
169 | scics_sds_remote_node_context_callback callback, | |
6f231dda DW |
170 | void *callback_parameter) |
171 | { | |
e2023b87 DJ |
172 | if (sci_rnc->destination_state != SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL) { |
173 | sci_rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY; | |
174 | sci_rnc->user_callback = callback; | |
175 | sci_rnc->user_cookie = callback_parameter; | |
6f231dda DW |
176 | } |
177 | } | |
178 | ||
6f231dda | 179 | static void scic_sds_remote_node_context_setup_to_destory( |
e2023b87 DJ |
180 | struct scic_sds_remote_node_context *sci_rnc, |
181 | scics_sds_remote_node_context_callback callback, | |
6f231dda DW |
182 | void *callback_parameter) |
183 | { | |
e2023b87 DJ |
184 | sci_rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL; |
185 | sci_rnc->user_callback = callback; | |
186 | sci_rnc->user_cookie = callback_parameter; | |
6f231dda DW |
187 | } |
188 | ||
6f231dda DW |
189 | /** |
190 | * | |
191 | * | |
192 | * This method just calls the user callback function and then resets the | |
193 | * callback. | |
194 | */ | |
195 | static void scic_sds_remote_node_context_notify_user( | |
196 | struct scic_sds_remote_node_context *rnc) | |
197 | { | |
198 | if (rnc->user_callback != NULL) { | |
199 | (*rnc->user_callback)(rnc->user_cookie); | |
200 | ||
201 | rnc->user_callback = NULL; | |
202 | rnc->user_cookie = NULL; | |
203 | } | |
204 | } | |
205 | ||
ed3efb77 | 206 | static void scic_sds_remote_node_context_continue_state_transitions(struct scic_sds_remote_node_context *rnc) |
6f231dda | 207 | { |
ed3efb77 DW |
208 | if (rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY) |
209 | scic_sds_remote_node_context_resume(rnc, rnc->user_callback, | |
210 | rnc->user_cookie); | |
6f231dda DW |
211 | } |
212 | ||
213 | /** | |
214 | * | |
e2023b87 | 215 | * @sci_rnc: The remote node context object that is to be validated. |
6f231dda DW |
216 | * |
217 | * This method will mark the rnc buffer as being valid and post the request to | |
218 | * the hardware. none | |
219 | */ | |
220 | static void scic_sds_remote_node_context_validate_context_buffer( | |
e2023b87 | 221 | struct scic_sds_remote_node_context *sci_rnc) |
6f231dda | 222 | { |
9614395e | 223 | struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc); |
a1a113b0 | 224 | struct domain_device *dev = sci_dev_to_domain(sci_dev); |
6f231dda DW |
225 | union scu_remote_node_context *rnc_buffer; |
226 | ||
227 | rnc_buffer = scic_sds_controller_get_remote_node_context_buffer( | |
9614395e | 228 | scic_sds_remote_device_get_controller(sci_dev), |
e2023b87 | 229 | sci_rnc->remote_node_index |
6f231dda DW |
230 | ); |
231 | ||
232 | rnc_buffer->ssp.is_valid = true; | |
233 | ||
9614395e | 234 | if (!sci_dev->is_direct_attached && |
a1a113b0 | 235 | (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP))) { |
9614395e DW |
236 | scic_sds_remote_device_post_request(sci_dev, |
237 | SCU_CONTEXT_COMMAND_POST_RNC_96); | |
6f231dda | 238 | } else { |
9614395e | 239 | scic_sds_remote_device_post_request(sci_dev, SCU_CONTEXT_COMMAND_POST_RNC_32); |
6f231dda | 240 | |
9614395e DW |
241 | if (sci_dev->is_direct_attached) { |
242 | scic_sds_port_setup_transports(sci_dev->owning_port, | |
243 | sci_rnc->remote_node_index); | |
6f231dda DW |
244 | } |
245 | } | |
246 | } | |
247 | ||
248 | /** | |
249 | * | |
e2023b87 | 250 | * @sci_rnc: The remote node context object that is to be invalidated. |
6f231dda DW |
251 | * |
252 | * This method will update the RNC buffer and post the invalidate request. none | |
253 | */ | |
254 | static void scic_sds_remote_node_context_invalidate_context_buffer( | |
e2023b87 | 255 | struct scic_sds_remote_node_context *sci_rnc) |
6f231dda DW |
256 | { |
257 | union scu_remote_node_context *rnc_buffer; | |
258 | ||
259 | rnc_buffer = scic_sds_controller_get_remote_node_context_buffer( | |
9614395e DW |
260 | scic_sds_remote_device_get_controller(rnc_to_dev(sci_rnc)), |
261 | sci_rnc->remote_node_index); | |
6f231dda DW |
262 | |
263 | rnc_buffer->ssp.is_valid = false; | |
264 | ||
9614395e DW |
265 | scic_sds_remote_device_post_request(rnc_to_dev(sci_rnc), |
266 | SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE); | |
6f231dda DW |
267 | } |
268 | ||
9a0fff7b | 269 | static void scic_sds_remote_node_context_initial_state_enter(void *object) |
6f231dda | 270 | { |
af23e857 | 271 | struct scic_sds_remote_node_context *rnc = object; |
f34d9e5d | 272 | struct sci_base_state_machine *sm = &rnc->state_machine; |
6f231dda | 273 | |
f34d9e5d DW |
274 | /* Check to see if we have gotten back to the initial state because |
275 | * someone requested to destroy the remote node context object. | |
276 | */ | |
277 | if (sm->previous_state_id == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE) { | |
6f231dda | 278 | rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED; |
6f231dda DW |
279 | scic_sds_remote_node_context_notify_user(rnc); |
280 | } | |
281 | } | |
282 | ||
9a0fff7b | 283 | static void scic_sds_remote_node_context_posting_state_enter(void *object) |
6f231dda | 284 | { |
af23e857 | 285 | struct scic_sds_remote_node_context *sci_rnc = object; |
6f231dda | 286 | |
e2023b87 | 287 | scic_sds_remote_node_context_validate_context_buffer(sci_rnc); |
6f231dda DW |
288 | } |
289 | ||
9a0fff7b | 290 | static void scic_sds_remote_node_context_invalidating_state_enter(void *object) |
6f231dda | 291 | { |
af23e857 | 292 | struct scic_sds_remote_node_context *rnc = object; |
6f231dda | 293 | |
6f231dda DW |
294 | scic_sds_remote_node_context_invalidate_context_buffer(rnc); |
295 | } | |
296 | ||
9a0fff7b | 297 | static void scic_sds_remote_node_context_resuming_state_enter(void *object) |
6f231dda | 298 | { |
af23e857 | 299 | struct scic_sds_remote_node_context *rnc = object; |
9614395e | 300 | struct scic_sds_remote_device *sci_dev; |
a1a113b0 | 301 | struct domain_device *dev; |
6f231dda | 302 | |
9614395e | 303 | sci_dev = rnc_to_dev(rnc); |
a1a113b0 | 304 | dev = sci_dev_to_domain(sci_dev); |
6f231dda | 305 | |
24621466 HD |
306 | /* |
307 | * For direct attached SATA devices we need to clear the TLCR | |
308 | * NCQ to TCi tag mapping on the phy and in cases where we | |
309 | * resume because of a target reset we also need to update | |
310 | * the STPTLDARNI register with the RNi of the device | |
311 | */ | |
a1a113b0 DW |
312 | if ((dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) && |
313 | sci_dev->is_direct_attached) | |
9614395e DW |
314 | scic_sds_port_setup_transports(sci_dev->owning_port, |
315 | rnc->remote_node_index); | |
24621466 | 316 | |
9614395e | 317 | scic_sds_remote_device_post_request(sci_dev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME); |
6f231dda DW |
318 | } |
319 | ||
9a0fff7b | 320 | static void scic_sds_remote_node_context_ready_state_enter(void *object) |
6f231dda | 321 | { |
af23e857 | 322 | struct scic_sds_remote_node_context *rnc = object; |
6f231dda | 323 | |
6f231dda DW |
324 | rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED; |
325 | ||
f34d9e5d | 326 | if (rnc->user_callback) |
6f231dda | 327 | scic_sds_remote_node_context_notify_user(rnc); |
6f231dda DW |
328 | } |
329 | ||
9a0fff7b | 330 | static void scic_sds_remote_node_context_tx_suspended_state_enter(void *object) |
6f231dda | 331 | { |
af23e857 | 332 | struct scic_sds_remote_node_context *rnc = object; |
6f231dda | 333 | |
6f231dda DW |
334 | scic_sds_remote_node_context_continue_state_transitions(rnc); |
335 | } | |
336 | ||
6f231dda | 337 | static void scic_sds_remote_node_context_tx_rx_suspended_state_enter( |
9a0fff7b | 338 | void *object) |
6f231dda | 339 | { |
af23e857 | 340 | struct scic_sds_remote_node_context *rnc = object; |
6f231dda | 341 | |
6f231dda DW |
342 | scic_sds_remote_node_context_continue_state_transitions(rnc); |
343 | } | |
344 | ||
35173d57 | 345 | static const struct sci_base_state scic_sds_remote_node_context_state_table[] = { |
6f231dda DW |
346 | [SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE] = { |
347 | .enter_state = scic_sds_remote_node_context_initial_state_enter, | |
348 | }, | |
349 | [SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE] = { | |
350 | .enter_state = scic_sds_remote_node_context_posting_state_enter, | |
351 | }, | |
352 | [SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE] = { | |
353 | .enter_state = scic_sds_remote_node_context_invalidating_state_enter, | |
354 | }, | |
355 | [SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE] = { | |
356 | .enter_state = scic_sds_remote_node_context_resuming_state_enter, | |
357 | }, | |
358 | [SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE] = { | |
359 | .enter_state = scic_sds_remote_node_context_ready_state_enter, | |
360 | }, | |
361 | [SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE] = { | |
362 | .enter_state = scic_sds_remote_node_context_tx_suspended_state_enter, | |
363 | }, | |
364 | [SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE] = { | |
365 | .enter_state = scic_sds_remote_node_context_tx_rx_suspended_state_enter, | |
366 | }, | |
f34d9e5d | 367 | [SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE] = { }, |
6f231dda DW |
368 | }; |
369 | ||
9614395e DW |
370 | void scic_sds_remote_node_context_construct(struct scic_sds_remote_node_context *rnc, |
371 | u16 remote_node_index) | |
35173d57 DW |
372 | { |
373 | memset(rnc, 0, sizeof(struct scic_sds_remote_node_context)); | |
374 | ||
375 | rnc->remote_node_index = remote_node_index; | |
35173d57 DW |
376 | rnc->destination_state = SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_UNSPECIFIED; |
377 | ||
378 | sci_base_state_machine_construct( | |
379 | &rnc->state_machine, | |
af23e857 | 380 | rnc, |
35173d57 DW |
381 | scic_sds_remote_node_context_state_table, |
382 | SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE | |
383 | ); | |
384 | ||
385 | sci_base_state_machine_start(&rnc->state_machine); | |
386 | } | |
338e386d DW |
387 | |
388 | enum sci_status scic_sds_remote_node_context_event_handler(struct scic_sds_remote_node_context *sci_rnc, | |
389 | u32 event_code) | |
390 | { | |
391 | enum scis_sds_remote_node_context_states state; | |
392 | ||
393 | state = sci_rnc->state_machine.current_state_id; | |
394 | switch (state) { | |
395 | case SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE: | |
396 | switch (scu_get_event_code(event_code)) { | |
397 | case SCU_EVENT_POST_RNC_COMPLETE: | |
398 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
399 | SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE); | |
400 | break; | |
401 | default: | |
402 | goto out; | |
403 | } | |
404 | break; | |
405 | case SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE: | |
406 | if (scu_get_event_code(event_code) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE) { | |
407 | if (sci_rnc->destination_state == SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_FINAL) | |
408 | state = SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE; | |
409 | else | |
410 | state = SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE; | |
411 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
412 | state); | |
413 | } else { | |
414 | switch (scu_get_event_type(event_code)) { | |
415 | case SCU_EVENT_TYPE_RNC_SUSPEND_TX: | |
416 | case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: | |
417 | /* We really dont care if the hardware is going to suspend | |
418 | * the device since it's being invalidated anyway */ | |
419 | dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
420 | "%s: SCIC Remote Node Context 0x%p was " | |
421 | "suspeneded by hardware while being " | |
422 | "invalidated.\n", __func__, sci_rnc); | |
423 | break; | |
424 | default: | |
425 | goto out; | |
426 | } | |
427 | } | |
428 | break; | |
429 | case SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE: | |
430 | if (scu_get_event_code(event_code) == SCU_EVENT_POST_RCN_RELEASE) { | |
431 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
432 | SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE); | |
433 | } else { | |
434 | switch (scu_get_event_type(event_code)) { | |
435 | case SCU_EVENT_TYPE_RNC_SUSPEND_TX: | |
436 | case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: | |
437 | /* We really dont care if the hardware is going to suspend | |
438 | * the device since it's being resumed anyway */ | |
439 | dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
440 | "%s: SCIC Remote Node Context 0x%p was " | |
441 | "suspeneded by hardware while being resumed.\n", | |
442 | __func__, sci_rnc); | |
443 | break; | |
444 | default: | |
445 | goto out; | |
446 | } | |
447 | } | |
448 | break; | |
449 | case SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE: | |
450 | switch (scu_get_event_type(event_code)) { | |
451 | case SCU_EVENT_TL_RNC_SUSPEND_TX: | |
452 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
453 | SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE); | |
454 | sci_rnc->suspension_code = scu_get_event_specifier(event_code); | |
455 | break; | |
456 | case SCU_EVENT_TL_RNC_SUSPEND_TX_RX: | |
457 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
458 | SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE); | |
459 | sci_rnc->suspension_code = scu_get_event_specifier(event_code); | |
460 | break; | |
461 | default: | |
462 | goto out; | |
463 | } | |
464 | break; | |
465 | case SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE: | |
466 | switch (scu_get_event_type(event_code)) { | |
467 | case SCU_EVENT_TL_RNC_SUSPEND_TX: | |
468 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
469 | SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE); | |
470 | sci_rnc->suspension_code = scu_get_event_specifier(event_code); | |
471 | break; | |
472 | case SCU_EVENT_TL_RNC_SUSPEND_TX_RX: | |
473 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
474 | SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE); | |
475 | sci_rnc->suspension_code = scu_get_event_specifier(event_code); | |
476 | break; | |
477 | default: | |
478 | goto out; | |
479 | } | |
480 | break; | |
481 | default: | |
482 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
483 | "%s: invalid state %d\n", __func__, state); | |
484 | return SCI_FAILURE_INVALID_STATE; | |
485 | } | |
486 | return SCI_SUCCESS; | |
487 | ||
488 | out: | |
489 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
490 | "%s: code: %#x state: %d\n", __func__, event_code, state); | |
491 | return SCI_FAILURE; | |
492 | ||
493 | } | |
c845ae96 DW |
494 | |
495 | enum sci_status scic_sds_remote_node_context_destruct(struct scic_sds_remote_node_context *sci_rnc, | |
496 | scics_sds_remote_node_context_callback cb_fn, | |
497 | void *cb_p) | |
498 | { | |
499 | enum scis_sds_remote_node_context_states state; | |
500 | ||
501 | state = sci_rnc->state_machine.current_state_id; | |
502 | switch (state) { | |
503 | case SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE: | |
504 | scic_sds_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p); | |
505 | return SCI_SUCCESS; | |
506 | case SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE: | |
507 | case SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE: | |
508 | case SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE: | |
509 | case SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE: | |
510 | case SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE: | |
511 | case SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE: | |
512 | scic_sds_remote_node_context_setup_to_destory(sci_rnc, cb_fn, cb_p); | |
513 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
514 | SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE); | |
515 | return SCI_SUCCESS; | |
516 | case SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE: | |
517 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
518 | "%s: invalid state %d\n", __func__, state); | |
519 | /* We have decided that the destruct request on the remote node context | |
520 | * can not fail since it is either in the initial/destroyed state or is | |
521 | * can be destroyed. | |
522 | */ | |
523 | return SCI_SUCCESS; | |
524 | default: | |
525 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
526 | "%s: invalid state %d\n", __func__, state); | |
527 | return SCI_FAILURE_INVALID_STATE; | |
528 | } | |
529 | } | |
ed3efb77 DW |
530 | |
531 | enum sci_status scic_sds_remote_node_context_suspend(struct scic_sds_remote_node_context *sci_rnc, | |
532 | u32 suspend_type, | |
533 | scics_sds_remote_node_context_callback cb_fn, | |
534 | void *cb_p) | |
535 | { | |
536 | enum scis_sds_remote_node_context_states state; | |
537 | ||
538 | state = sci_rnc->state_machine.current_state_id; | |
539 | if (state != SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE) { | |
540 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
541 | "%s: invalid state %d\n", __func__, state); | |
542 | return SCI_FAILURE_INVALID_STATE; | |
543 | } | |
544 | ||
545 | sci_rnc->user_callback = cb_fn; | |
546 | sci_rnc->user_cookie = cb_p; | |
547 | sci_rnc->suspension_code = suspend_type; | |
548 | ||
549 | if (suspend_type == SCI_SOFTWARE_SUSPENSION) { | |
550 | scic_sds_remote_device_post_request(rnc_to_dev(sci_rnc), | |
551 | SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX); | |
552 | } | |
553 | ||
554 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
555 | SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE); | |
556 | return SCI_SUCCESS; | |
557 | } | |
558 | ||
559 | enum sci_status scic_sds_remote_node_context_resume(struct scic_sds_remote_node_context *sci_rnc, | |
560 | scics_sds_remote_node_context_callback cb_fn, | |
561 | void *cb_p) | |
562 | { | |
563 | enum scis_sds_remote_node_context_states state; | |
564 | ||
565 | state = sci_rnc->state_machine.current_state_id; | |
566 | switch (state) { | |
567 | case SCIC_SDS_REMOTE_NODE_CONTEXT_INITIAL_STATE: | |
568 | if (sci_rnc->remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) | |
569 | return SCI_FAILURE_INVALID_STATE; | |
570 | ||
571 | scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); | |
572 | scic_sds_remote_node_context_construct_buffer(sci_rnc); | |
573 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
574 | SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE); | |
575 | return SCI_SUCCESS; | |
576 | case SCIC_SDS_REMOTE_NODE_CONTEXT_POSTING_STATE: | |
577 | case SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE: | |
578 | case SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE: | |
579 | if (sci_rnc->destination_state != SCIC_SDS_REMOTE_NODE_DESTINATION_STATE_READY) | |
580 | return SCI_FAILURE_INVALID_STATE; | |
581 | ||
582 | sci_rnc->user_callback = cb_fn; | |
583 | sci_rnc->user_cookie = cb_p; | |
584 | return SCI_SUCCESS; | |
585 | case SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE: { | |
586 | struct scic_sds_remote_device *sci_dev = rnc_to_dev(sci_rnc); | |
587 | struct domain_device *dev = sci_dev_to_domain(sci_dev); | |
588 | ||
589 | scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); | |
590 | ||
591 | /* TODO: consider adding a resume action of NONE, INVALIDATE, WRITE_TLCR */ | |
592 | if (dev->dev_type == SAS_END_DEV || dev_is_expander(dev)) | |
593 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
594 | SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE); | |
595 | else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { | |
596 | if (sci_dev->is_direct_attached) { | |
597 | /* @todo Fix this since I am being silly in writing to the STPTLDARNI register. */ | |
598 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
599 | SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE); | |
600 | } else { | |
601 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
602 | SCIC_SDS_REMOTE_NODE_CONTEXT_INVALIDATING_STATE); | |
603 | } | |
604 | } else | |
605 | return SCI_FAILURE; | |
606 | return SCI_SUCCESS; | |
607 | } | |
608 | case SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE: | |
609 | scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); | |
610 | sci_base_state_machine_change_state(&sci_rnc->state_machine, | |
611 | SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE); | |
612 | return SCI_FAILURE_INVALID_STATE; | |
613 | case SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE: | |
614 | scic_sds_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p); | |
615 | return SCI_SUCCESS; | |
616 | default: | |
617 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
618 | "%s: invalid state %d\n", __func__, state); | |
619 | return SCI_FAILURE_INVALID_STATE; | |
620 | } | |
621 | } | |
f34d9e5d DW |
622 | |
623 | enum sci_status scic_sds_remote_node_context_start_io(struct scic_sds_remote_node_context *sci_rnc, | |
624 | struct scic_sds_request *sci_req) | |
625 | { | |
626 | enum scis_sds_remote_node_context_states state; | |
627 | ||
628 | state = sci_rnc->state_machine.current_state_id; | |
629 | if (state != SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE) { | |
630 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
631 | "%s: invalid state %d\n", __func__, state); | |
632 | return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED; | |
633 | } | |
634 | return SCI_SUCCESS; | |
635 | } | |
636 | ||
637 | enum sci_status scic_sds_remote_node_context_start_task(struct scic_sds_remote_node_context *sci_rnc, | |
638 | struct scic_sds_request *sci_req) | |
639 | { | |
640 | enum scis_sds_remote_node_context_states state; | |
641 | ||
642 | state = sci_rnc->state_machine.current_state_id; | |
643 | switch (state) { | |
644 | case SCIC_SDS_REMOTE_NODE_CONTEXT_RESUMING_STATE: | |
645 | case SCIC_SDS_REMOTE_NODE_CONTEXT_READY_STATE: | |
646 | case SCIC_SDS_REMOTE_NODE_CONTEXT_AWAIT_SUSPENSION_STATE: | |
647 | return SCI_SUCCESS; | |
648 | case SCIC_SDS_REMOTE_NODE_CONTEXT_TX_SUSPENDED_STATE: | |
649 | case SCIC_SDS_REMOTE_NODE_CONTEXT_TX_RX_SUSPENDED_STATE: | |
650 | scic_sds_remote_node_context_resume(sci_rnc, NULL, NULL); | |
651 | return SCI_SUCCESS; | |
652 | default: | |
653 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
654 | "%s: invalid state %d\n", __func__, state); | |
655 | return SCI_FAILURE_INVALID_STATE; | |
656 | } | |
657 | } |