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 | */ | |
c94fc1ad | 55 | #include <scsi/sas_ata.h> |
cc9203bf | 56 | #include "host.h" |
12ef6544 | 57 | #include "isci.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 | ||
d7a0ccdd DW |
63 | #undef C |
64 | #define C(a) (#a) | |
65 | const char *rnc_state_name(enum scis_sds_remote_node_context_states state) | |
66 | { | |
67 | static const char * const strings[] = RNC_STATES; | |
6f231dda | 68 | |
5cfa2a3c AB |
69 | if (state >= ARRAY_SIZE(strings)) |
70 | return "UNKNOWN"; | |
71 | ||
d7a0ccdd DW |
72 | return strings[state]; |
73 | } | |
74 | #undef C | |
6f231dda DW |
75 | |
76 | /** | |
ad276048 | 77 | * sci_remote_node_context_is_ready() |
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 | */ | |
89a7301f DW |
84 | bool sci_remote_node_context_is_ready( |
85 | struct sci_remote_node_context *sci_rnc) | |
6f231dda | 86 | { |
e301370a | 87 | u32 current_state = sci_rnc->sm.current_state_id; |
6f231dda | 88 | |
e301370a | 89 | if (current_state == SCI_RNC_READY) { |
6f231dda DW |
90 | return true; |
91 | } | |
92 | ||
93 | return false; | |
94 | } | |
95 | ||
31a38ef0 JS |
96 | bool sci_remote_node_context_is_suspended(struct sci_remote_node_context *sci_rnc) |
97 | { | |
98 | u32 current_state = sci_rnc->sm.current_state_id; | |
99 | ||
100 | if (current_state == SCI_RNC_TX_RX_SUSPENDED) | |
101 | return true; | |
102 | return false; | |
103 | } | |
104 | ||
89a7301f DW |
105 | static union scu_remote_node_context *sci_rnc_by_id(struct isci_host *ihost, u16 id) |
106 | { | |
107 | if (id < ihost->remote_node_entries && | |
108 | ihost->device_table[id]) | |
109 | return &ihost->remote_node_context_table[id]; | |
110 | ||
111 | return NULL; | |
112 | } | |
113 | ||
114 | static void sci_remote_node_context_construct_buffer(struct sci_remote_node_context *sci_rnc) | |
6f231dda | 115 | { |
78a6f06e DW |
116 | struct isci_remote_device *idev = rnc_to_dev(sci_rnc); |
117 | struct domain_device *dev = idev->domain_dev; | |
1f4fa1f9 | 118 | int rni = sci_rnc->remote_node_index; |
a1a113b0 | 119 | union scu_remote_node_context *rnc; |
d9dcb4ba | 120 | struct isci_host *ihost; |
a3d568f0 | 121 | __le64 sas_addr; |
6f231dda | 122 | |
34a99158 | 123 | ihost = idev->owning_port->owning_controller; |
89a7301f | 124 | rnc = sci_rnc_by_id(ihost, rni); |
6f231dda | 125 | |
9614395e | 126 | memset(rnc, 0, sizeof(union scu_remote_node_context) |
89a7301f | 127 | * sci_remote_device_node_count(idev)); |
6f231dda | 128 | |
1f4fa1f9 | 129 | rnc->ssp.remote_node_index = rni; |
78a6f06e DW |
130 | rnc->ssp.remote_node_port_width = idev->device_port_width; |
131 | rnc->ssp.logical_port_index = idev->owning_port->physical_port_index; | |
6f231dda | 132 | |
a3d568f0 DW |
133 | /* sas address is __be64, context ram format is __le64 */ |
134 | sas_addr = cpu_to_le64(SAS_ADDR(dev->sas_addr)); | |
135 | rnc->ssp.remote_sas_address_hi = upper_32_bits(sas_addr); | |
136 | rnc->ssp.remote_sas_address_lo = lower_32_bits(sas_addr); | |
6f231dda DW |
137 | |
138 | rnc->ssp.nexus_loss_timer_enable = true; | |
139 | rnc->ssp.check_bit = false; | |
140 | rnc->ssp.is_valid = false; | |
141 | rnc->ssp.is_remote_node_context = true; | |
142 | rnc->ssp.function_number = 0; | |
143 | ||
144 | rnc->ssp.arbitration_wait_time = 0; | |
145 | ||
11cc5183 | 146 | if (dev_is_sata(dev)) { |
6f231dda | 147 | rnc->ssp.connection_occupancy_timeout = |
89a7301f | 148 | ihost->user_parameters.stp_max_occupancy_timeout; |
6f231dda | 149 | rnc->ssp.connection_inactivity_timeout = |
89a7301f | 150 | ihost->user_parameters.stp_inactivity_timeout; |
6f231dda DW |
151 | } else { |
152 | rnc->ssp.connection_occupancy_timeout = | |
89a7301f | 153 | ihost->user_parameters.ssp_max_occupancy_timeout; |
6f231dda | 154 | rnc->ssp.connection_inactivity_timeout = |
89a7301f | 155 | ihost->user_parameters.ssp_inactivity_timeout; |
6f231dda DW |
156 | } |
157 | ||
158 | rnc->ssp.initial_arbitration_wait_time = 0; | |
159 | ||
160 | /* Open Address Frame Parameters */ | |
78a6f06e | 161 | rnc->ssp.oaf_connection_rate = idev->connection_rate; |
6f231dda DW |
162 | rnc->ssp.oaf_features = 0; |
163 | rnc->ssp.oaf_source_zone_group = 0; | |
164 | rnc->ssp.oaf_more_compatibility_features = 0; | |
165 | } | |
ad276048 | 166 | /* |
6f231dda DW |
167 | * This method will setup the remote node context object so it will transition |
168 | * to its ready state. If the remote node context is already setup to | |
169 | * transition to its final state then this function does nothing. none | |
170 | */ | |
89a7301f DW |
171 | static void sci_remote_node_context_setup_to_resume( |
172 | struct sci_remote_node_context *sci_rnc, | |
e2023b87 | 173 | scics_sds_remote_node_context_callback callback, |
59e35396 JS |
174 | void *callback_parameter, |
175 | enum sci_remote_node_context_destination_state dest_param) | |
6f231dda | 176 | { |
59e35396 JS |
177 | if (sci_rnc->destination_state != RNC_DEST_FINAL) { |
178 | sci_rnc->destination_state = dest_param; | |
6c6aacbb JS |
179 | if (callback != NULL) { |
180 | sci_rnc->user_callback = callback; | |
181 | sci_rnc->user_cookie = callback_parameter; | |
182 | } | |
6f231dda DW |
183 | } |
184 | } | |
185 | ||
59e35396 | 186 | static void sci_remote_node_context_setup_to_destroy( |
89a7301f | 187 | struct sci_remote_node_context *sci_rnc, |
e2023b87 | 188 | scics_sds_remote_node_context_callback callback, |
6f231dda DW |
189 | void *callback_parameter) |
190 | { | |
de2eb4d5 JS |
191 | struct isci_host *ihost = idev_to_ihost(rnc_to_dev(sci_rnc)); |
192 | ||
59e35396 | 193 | sci_rnc->destination_state = RNC_DEST_FINAL; |
e2023b87 DJ |
194 | sci_rnc->user_callback = callback; |
195 | sci_rnc->user_cookie = callback_parameter; | |
de2eb4d5 JS |
196 | |
197 | wake_up(&ihost->eventq); | |
6f231dda DW |
198 | } |
199 | ||
d2d480f1 | 200 | /* |
6f231dda DW |
201 | * This method just calls the user callback function and then resets the |
202 | * callback. | |
203 | */ | |
89a7301f DW |
204 | static void sci_remote_node_context_notify_user( |
205 | struct sci_remote_node_context *rnc) | |
6f231dda DW |
206 | { |
207 | if (rnc->user_callback != NULL) { | |
208 | (*rnc->user_callback)(rnc->user_cookie); | |
209 | ||
210 | rnc->user_callback = NULL; | |
211 | rnc->user_cookie = NULL; | |
212 | } | |
213 | } | |
214 | ||
89a7301f | 215 | static void sci_remote_node_context_continue_state_transitions(struct sci_remote_node_context *rnc) |
6f231dda | 216 | { |
79cbab89 JS |
217 | switch (rnc->destination_state) { |
218 | case RNC_DEST_READY: | |
219 | case RNC_DEST_SUSPENDED_RESUME: | |
59e35396 | 220 | rnc->destination_state = RNC_DEST_READY; |
df561f66 | 221 | fallthrough; |
79cbab89 | 222 | case RNC_DEST_FINAL: |
89a7301f | 223 | sci_remote_node_context_resume(rnc, rnc->user_callback, |
79cbab89 JS |
224 | rnc->user_cookie); |
225 | break; | |
226 | default: | |
59e35396 | 227 | rnc->destination_state = RNC_DEST_UNSPECIFIED; |
79cbab89 JS |
228 | break; |
229 | } | |
6f231dda DW |
230 | } |
231 | ||
89a7301f | 232 | static void sci_remote_node_context_validate_context_buffer(struct sci_remote_node_context *sci_rnc) |
6f231dda | 233 | { |
89a7301f | 234 | union scu_remote_node_context *rnc_buffer; |
78a6f06e DW |
235 | struct isci_remote_device *idev = rnc_to_dev(sci_rnc); |
236 | struct domain_device *dev = idev->domain_dev; | |
89a7301f | 237 | struct isci_host *ihost = idev->owning_port->owning_controller; |
6f231dda | 238 | |
89a7301f | 239 | rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index); |
6f231dda DW |
240 | |
241 | rnc_buffer->ssp.is_valid = true; | |
242 | ||
11cc5183 | 243 | if (dev_is_sata(dev) && dev->parent) { |
89a7301f | 244 | sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_96); |
6f231dda | 245 | } else { |
89a7301f | 246 | sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_32); |
6f231dda | 247 | |
11cc5183 | 248 | if (!dev->parent) |
89a7301f DW |
249 | sci_port_setup_transports(idev->owning_port, |
250 | sci_rnc->remote_node_index); | |
6f231dda DW |
251 | } |
252 | } | |
253 | ||
89a7301f | 254 | static void sci_remote_node_context_invalidate_context_buffer(struct sci_remote_node_context *sci_rnc) |
6f231dda DW |
255 | { |
256 | union scu_remote_node_context *rnc_buffer; | |
89a7301f DW |
257 | struct isci_remote_device *idev = rnc_to_dev(sci_rnc); |
258 | struct isci_host *ihost = idev->owning_port->owning_controller; | |
6f231dda | 259 | |
89a7301f | 260 | rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index); |
6f231dda DW |
261 | |
262 | rnc_buffer->ssp.is_valid = false; | |
263 | ||
89a7301f DW |
264 | sci_remote_device_post_request(rnc_to_dev(sci_rnc), |
265 | SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE); | |
6f231dda DW |
266 | } |
267 | ||
89a7301f | 268 | static void sci_remote_node_context_initial_state_enter(struct sci_base_state_machine *sm) |
6f231dda | 269 | { |
89a7301f | 270 | struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); |
1f053889 JS |
271 | struct isci_remote_device *idev = rnc_to_dev(rnc); |
272 | struct isci_host *ihost = idev->owning_port->owning_controller; | |
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 | */ | |
e301370a | 277 | if (sm->previous_state_id == SCI_RNC_INVALIDATING) { |
59e35396 | 278 | rnc->destination_state = RNC_DEST_UNSPECIFIED; |
89a7301f | 279 | sci_remote_node_context_notify_user(rnc); |
1f053889 JS |
280 | |
281 | smp_wmb(); | |
282 | wake_up(&ihost->eventq); | |
6f231dda DW |
283 | } |
284 | } | |
285 | ||
89a7301f | 286 | static void sci_remote_node_context_posting_state_enter(struct sci_base_state_machine *sm) |
6f231dda | 287 | { |
89a7301f | 288 | struct sci_remote_node_context *sci_rnc = container_of(sm, typeof(*sci_rnc), sm); |
6f231dda | 289 | |
89a7301f | 290 | sci_remote_node_context_validate_context_buffer(sci_rnc); |
6f231dda DW |
291 | } |
292 | ||
89a7301f | 293 | static void sci_remote_node_context_invalidating_state_enter(struct sci_base_state_machine *sm) |
6f231dda | 294 | { |
89a7301f | 295 | struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); |
6f231dda | 296 | |
aa20d934 JS |
297 | /* Terminate all outstanding requests. */ |
298 | sci_remote_device_terminate_requests(rnc_to_dev(rnc)); | |
89a7301f | 299 | sci_remote_node_context_invalidate_context_buffer(rnc); |
6f231dda DW |
300 | } |
301 | ||
89a7301f | 302 | static void sci_remote_node_context_resuming_state_enter(struct sci_base_state_machine *sm) |
6f231dda | 303 | { |
89a7301f | 304 | struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); |
78a6f06e | 305 | struct isci_remote_device *idev; |
a1a113b0 | 306 | struct domain_device *dev; |
6f231dda | 307 | |
78a6f06e DW |
308 | idev = rnc_to_dev(rnc); |
309 | dev = idev->domain_dev; | |
6f231dda | 310 | |
24621466 HD |
311 | /* |
312 | * For direct attached SATA devices we need to clear the TLCR | |
313 | * NCQ to TCi tag mapping on the phy and in cases where we | |
314 | * resume because of a target reset we also need to update | |
315 | * the STPTLDARNI register with the RNi of the device | |
316 | */ | |
11cc5183 DW |
317 | if (dev_is_sata(dev) && !dev->parent) |
318 | sci_port_setup_transports(idev->owning_port, rnc->remote_node_index); | |
24621466 | 319 | |
89a7301f | 320 | sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME); |
6f231dda DW |
321 | } |
322 | ||
89a7301f | 323 | static void sci_remote_node_context_ready_state_enter(struct sci_base_state_machine *sm) |
6f231dda | 324 | { |
89a7301f | 325 | struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); |
59e35396 | 326 | enum sci_remote_node_context_destination_state dest_select; |
59e35396 JS |
327 | int tell_user = 1; |
328 | ||
329 | dest_select = rnc->destination_state; | |
330 | rnc->destination_state = RNC_DEST_UNSPECIFIED; | |
331 | ||
332 | if ((dest_select == RNC_DEST_SUSPENDED) || | |
333 | (dest_select == RNC_DEST_SUSPENDED_RESUME)) { | |
334 | sci_remote_node_context_suspend( | |
447bfbce JS |
335 | rnc, rnc->suspend_reason, |
336 | SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT); | |
59e35396 | 337 | |
d76689e4 | 338 | if (dest_select == RNC_DEST_SUSPENDED_RESUME) |
59e35396 | 339 | tell_user = 0; /* Wait until ready again. */ |
59e35396 | 340 | } |
d76689e4 | 341 | if (tell_user) |
89a7301f | 342 | sci_remote_node_context_notify_user(rnc); |
6f231dda DW |
343 | } |
344 | ||
89a7301f | 345 | static void sci_remote_node_context_tx_suspended_state_enter(struct sci_base_state_machine *sm) |
6f231dda | 346 | { |
89a7301f | 347 | struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); |
6f231dda | 348 | |
89a7301f | 349 | sci_remote_node_context_continue_state_transitions(rnc); |
6f231dda DW |
350 | } |
351 | ||
89a7301f | 352 | static void sci_remote_node_context_tx_rx_suspended_state_enter(struct sci_base_state_machine *sm) |
6f231dda | 353 | { |
89a7301f | 354 | struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm); |
726980d5 JS |
355 | struct isci_remote_device *idev = rnc_to_dev(rnc); |
356 | struct isci_host *ihost = idev->owning_port->owning_controller; | |
31a38ef0 JS |
357 | u32 new_count = rnc->suspend_count + 1; |
358 | ||
359 | if (new_count == 0) | |
360 | rnc->suspend_count = 1; | |
361 | else | |
362 | rnc->suspend_count = new_count; | |
363 | smp_wmb(); | |
726980d5 | 364 | |
726980d5 JS |
365 | /* Terminate outstanding requests pending abort. */ |
366 | sci_remote_device_abort_requests_pending_abort(idev); | |
367 | ||
368 | wake_up(&ihost->eventq); | |
89a7301f | 369 | sci_remote_node_context_continue_state_transitions(rnc); |
6f231dda DW |
370 | } |
371 | ||
6f48844e JS |
372 | static void sci_remote_node_context_await_suspend_state_exit( |
373 | struct sci_base_state_machine *sm) | |
374 | { | |
375 | struct sci_remote_node_context *rnc | |
376 | = container_of(sm, typeof(*rnc), sm); | |
c94fc1ad | 377 | struct isci_remote_device *idev = rnc_to_dev(rnc); |
6f48844e | 378 | |
c94fc1ad JS |
379 | if (dev_is_sata(idev->domain_dev)) |
380 | isci_dev_set_hang_detection_timeout(idev, 0); | |
6f48844e JS |
381 | } |
382 | ||
89a7301f | 383 | static const struct sci_base_state sci_remote_node_context_state_table[] = { |
e301370a | 384 | [SCI_RNC_INITIAL] = { |
89a7301f | 385 | .enter_state = sci_remote_node_context_initial_state_enter, |
6f231dda | 386 | }, |
e301370a | 387 | [SCI_RNC_POSTING] = { |
89a7301f | 388 | .enter_state = sci_remote_node_context_posting_state_enter, |
6f231dda | 389 | }, |
e301370a | 390 | [SCI_RNC_INVALIDATING] = { |
89a7301f | 391 | .enter_state = sci_remote_node_context_invalidating_state_enter, |
6f231dda | 392 | }, |
e301370a | 393 | [SCI_RNC_RESUMING] = { |
89a7301f | 394 | .enter_state = sci_remote_node_context_resuming_state_enter, |
6f231dda | 395 | }, |
e301370a | 396 | [SCI_RNC_READY] = { |
89a7301f | 397 | .enter_state = sci_remote_node_context_ready_state_enter, |
6f231dda | 398 | }, |
e301370a | 399 | [SCI_RNC_TX_SUSPENDED] = { |
89a7301f | 400 | .enter_state = sci_remote_node_context_tx_suspended_state_enter, |
6f231dda | 401 | }, |
e301370a | 402 | [SCI_RNC_TX_RX_SUSPENDED] = { |
89a7301f | 403 | .enter_state = sci_remote_node_context_tx_rx_suspended_state_enter, |
6f231dda | 404 | }, |
6f48844e JS |
405 | [SCI_RNC_AWAIT_SUSPENSION] = { |
406 | .exit_state = sci_remote_node_context_await_suspend_state_exit, | |
407 | }, | |
6f231dda DW |
408 | }; |
409 | ||
89a7301f | 410 | void sci_remote_node_context_construct(struct sci_remote_node_context *rnc, |
9614395e | 411 | u16 remote_node_index) |
35173d57 | 412 | { |
89a7301f | 413 | memset(rnc, 0, sizeof(struct sci_remote_node_context)); |
35173d57 DW |
414 | |
415 | rnc->remote_node_index = remote_node_index; | |
59e35396 | 416 | rnc->destination_state = RNC_DEST_UNSPECIFIED; |
35173d57 | 417 | |
89a7301f | 418 | sci_init_sm(&rnc->sm, sci_remote_node_context_state_table, SCI_RNC_INITIAL); |
35173d57 | 419 | } |
338e386d | 420 | |
89a7301f | 421 | enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_context *sci_rnc, |
338e386d DW |
422 | u32 event_code) |
423 | { | |
424 | enum scis_sds_remote_node_context_states state; | |
ac78ed0f | 425 | u32 next_state; |
338e386d | 426 | |
e301370a | 427 | state = sci_rnc->sm.current_state_id; |
338e386d | 428 | switch (state) { |
e301370a | 429 | case SCI_RNC_POSTING: |
338e386d DW |
430 | switch (scu_get_event_code(event_code)) { |
431 | case SCU_EVENT_POST_RNC_COMPLETE: | |
e301370a | 432 | sci_change_state(&sci_rnc->sm, SCI_RNC_READY); |
338e386d DW |
433 | break; |
434 | default: | |
435 | goto out; | |
436 | } | |
437 | break; | |
e301370a | 438 | case SCI_RNC_INVALIDATING: |
338e386d | 439 | if (scu_get_event_code(event_code) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE) { |
59e35396 JS |
440 | if (sci_rnc->destination_state == RNC_DEST_FINAL) |
441 | next_state = SCI_RNC_INITIAL; | |
338e386d | 442 | else |
59e35396 JS |
443 | next_state = SCI_RNC_POSTING; |
444 | sci_change_state(&sci_rnc->sm, next_state); | |
338e386d DW |
445 | } else { |
446 | switch (scu_get_event_type(event_code)) { | |
447 | case SCU_EVENT_TYPE_RNC_SUSPEND_TX: | |
448 | case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: | |
449 | /* We really dont care if the hardware is going to suspend | |
450 | * the device since it's being invalidated anyway */ | |
8c731888 | 451 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), |
338e386d | 452 | "%s: SCIC Remote Node Context 0x%p was " |
99c7b6ae | 453 | "suspended by hardware while being " |
338e386d DW |
454 | "invalidated.\n", __func__, sci_rnc); |
455 | break; | |
456 | default: | |
457 | goto out; | |
458 | } | |
459 | } | |
460 | break; | |
e301370a | 461 | case SCI_RNC_RESUMING: |
338e386d | 462 | if (scu_get_event_code(event_code) == SCU_EVENT_POST_RCN_RELEASE) { |
e301370a | 463 | sci_change_state(&sci_rnc->sm, SCI_RNC_READY); |
338e386d DW |
464 | } else { |
465 | switch (scu_get_event_type(event_code)) { | |
466 | case SCU_EVENT_TYPE_RNC_SUSPEND_TX: | |
467 | case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: | |
468 | /* We really dont care if the hardware is going to suspend | |
469 | * the device since it's being resumed anyway */ | |
8c731888 | 470 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), |
338e386d | 471 | "%s: SCIC Remote Node Context 0x%p was " |
99c7b6ae | 472 | "suspended by hardware while being resumed.\n", |
338e386d DW |
473 | __func__, sci_rnc); |
474 | break; | |
475 | default: | |
476 | goto out; | |
477 | } | |
478 | } | |
479 | break; | |
e301370a | 480 | case SCI_RNC_READY: |
338e386d DW |
481 | switch (scu_get_event_type(event_code)) { |
482 | case SCU_EVENT_TL_RNC_SUSPEND_TX: | |
e301370a | 483 | sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED); |
ac78ed0f | 484 | sci_rnc->suspend_type = scu_get_event_type(event_code); |
338e386d DW |
485 | break; |
486 | case SCU_EVENT_TL_RNC_SUSPEND_TX_RX: | |
e301370a | 487 | sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED); |
ac78ed0f | 488 | sci_rnc->suspend_type = scu_get_event_type(event_code); |
338e386d DW |
489 | break; |
490 | default: | |
491 | goto out; | |
492 | } | |
493 | break; | |
e301370a | 494 | case SCI_RNC_AWAIT_SUSPENSION: |
338e386d DW |
495 | switch (scu_get_event_type(event_code)) { |
496 | case SCU_EVENT_TL_RNC_SUSPEND_TX: | |
ac78ed0f | 497 | next_state = SCI_RNC_TX_SUSPENDED; |
338e386d DW |
498 | break; |
499 | case SCU_EVENT_TL_RNC_SUSPEND_TX_RX: | |
ac78ed0f | 500 | next_state = SCI_RNC_TX_RX_SUSPENDED; |
338e386d DW |
501 | break; |
502 | default: | |
503 | goto out; | |
504 | } | |
ac78ed0f JS |
505 | if (sci_rnc->suspend_type == scu_get_event_type(event_code)) |
506 | sci_change_state(&sci_rnc->sm, next_state); | |
338e386d DW |
507 | break; |
508 | default: | |
509 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
14e99b4a DW |
510 | "%s: invalid state: %s\n", __func__, |
511 | rnc_state_name(state)); | |
338e386d DW |
512 | return SCI_FAILURE_INVALID_STATE; |
513 | } | |
514 | return SCI_SUCCESS; | |
515 | ||
516 | out: | |
517 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
14e99b4a DW |
518 | "%s: code: %#x state: %s\n", __func__, event_code, |
519 | rnc_state_name(state)); | |
338e386d DW |
520 | return SCI_FAILURE; |
521 | ||
522 | } | |
c845ae96 | 523 | |
89a7301f | 524 | enum sci_status sci_remote_node_context_destruct(struct sci_remote_node_context *sci_rnc, |
c845ae96 DW |
525 | scics_sds_remote_node_context_callback cb_fn, |
526 | void *cb_p) | |
527 | { | |
528 | enum scis_sds_remote_node_context_states state; | |
529 | ||
e301370a | 530 | state = sci_rnc->sm.current_state_id; |
c845ae96 | 531 | switch (state) { |
e301370a | 532 | case SCI_RNC_INVALIDATING: |
59e35396 | 533 | sci_remote_node_context_setup_to_destroy(sci_rnc, cb_fn, cb_p); |
c845ae96 | 534 | return SCI_SUCCESS; |
e301370a EN |
535 | case SCI_RNC_POSTING: |
536 | case SCI_RNC_RESUMING: | |
537 | case SCI_RNC_READY: | |
538 | case SCI_RNC_TX_SUSPENDED: | |
539 | case SCI_RNC_TX_RX_SUSPENDED: | |
59e35396 | 540 | sci_remote_node_context_setup_to_destroy(sci_rnc, cb_fn, cb_p); |
e301370a | 541 | sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING); |
c845ae96 | 542 | return SCI_SUCCESS; |
79cbab89 JS |
543 | case SCI_RNC_AWAIT_SUSPENSION: |
544 | sci_remote_node_context_setup_to_destroy(sci_rnc, cb_fn, cb_p); | |
545 | return SCI_SUCCESS; | |
e301370a | 546 | case SCI_RNC_INITIAL: |
c845ae96 | 547 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), |
14e99b4a DW |
548 | "%s: invalid state: %s\n", __func__, |
549 | rnc_state_name(state)); | |
c845ae96 DW |
550 | /* We have decided that the destruct request on the remote node context |
551 | * can not fail since it is either in the initial/destroyed state or is | |
552 | * can be destroyed. | |
553 | */ | |
554 | return SCI_SUCCESS; | |
555 | default: | |
556 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
14e99b4a DW |
557 | "%s: invalid state %s\n", __func__, |
558 | rnc_state_name(state)); | |
c845ae96 DW |
559 | return SCI_FAILURE_INVALID_STATE; |
560 | } | |
561 | } | |
ed3efb77 | 562 | |
ac78ed0f JS |
563 | enum sci_status sci_remote_node_context_suspend( |
564 | struct sci_remote_node_context *sci_rnc, | |
565 | enum sci_remote_node_suspension_reasons suspend_reason, | |
447bfbce | 566 | u32 suspend_type) |
ed3efb77 | 567 | { |
ac78ed0f JS |
568 | enum scis_sds_remote_node_context_states state |
569 | = sci_rnc->sm.current_state_id; | |
570 | struct isci_remote_device *idev = rnc_to_dev(sci_rnc); | |
571 | enum sci_status status = SCI_FAILURE_INVALID_STATE; | |
59e35396 JS |
572 | enum sci_remote_node_context_destination_state dest_param = |
573 | RNC_DEST_UNSPECIFIED; | |
ed3efb77 | 574 | |
726980d5 | 575 | dev_dbg(scirdev_to_dev(idev), |
8c731888 | 576 | "%s: current state %s, current suspend_type %x dest state %d," |
726980d5 | 577 | " arg suspend_reason %d, arg suspend_type %x", |
8c731888 | 578 | __func__, rnc_state_name(state), sci_rnc->suspend_type, |
726980d5 JS |
579 | sci_rnc->destination_state, suspend_reason, |
580 | suspend_type); | |
581 | ||
ac78ed0f | 582 | /* Disable automatic state continuations if explicitly suspending. */ |
c94fc1ad | 583 | if ((suspend_reason == SCI_HW_SUSPEND) || |
59e35396 JS |
584 | (sci_rnc->destination_state == RNC_DEST_FINAL)) |
585 | dest_param = sci_rnc->destination_state; | |
586 | ||
ac78ed0f JS |
587 | switch (state) { |
588 | case SCI_RNC_READY: | |
589 | break; | |
59e35396 JS |
590 | case SCI_RNC_INVALIDATING: |
591 | if (sci_rnc->destination_state == RNC_DEST_FINAL) { | |
592 | dev_warn(scirdev_to_dev(idev), | |
593 | "%s: already destroying %p\n", | |
594 | __func__, sci_rnc); | |
595 | return SCI_FAILURE_INVALID_STATE; | |
596 | } | |
df561f66 | 597 | fallthrough; /* and handle like SCI_RNC_POSTING */ |
d76689e4 | 598 | case SCI_RNC_RESUMING: |
df561f66 | 599 | fallthrough; /* and handle like SCI_RNC_POSTING */ |
59e35396 JS |
600 | case SCI_RNC_POSTING: |
601 | /* Set the destination state to AWAIT - this signals the | |
602 | * entry into the SCI_RNC_READY state that a suspension | |
603 | * needs to be done immediately. | |
604 | */ | |
6c6aacbb JS |
605 | if (sci_rnc->destination_state != RNC_DEST_FINAL) |
606 | sci_rnc->destination_state = RNC_DEST_SUSPENDED; | |
447bfbce JS |
607 | sci_rnc->suspend_type = suspend_type; |
608 | sci_rnc->suspend_reason = suspend_reason; | |
59e35396 JS |
609 | return SCI_SUCCESS; |
610 | ||
ac78ed0f JS |
611 | case SCI_RNC_TX_SUSPENDED: |
612 | if (suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX) | |
613 | status = SCI_SUCCESS; | |
614 | break; | |
615 | case SCI_RNC_TX_RX_SUSPENDED: | |
616 | if (suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX_RX) | |
617 | status = SCI_SUCCESS; | |
618 | break; | |
619 | case SCI_RNC_AWAIT_SUSPENSION: | |
620 | if ((sci_rnc->suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX_RX) | |
621 | || (suspend_type == sci_rnc->suspend_type)) | |
622 | return SCI_SUCCESS; | |
623 | break; | |
624 | default: | |
ed3efb77 | 625 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), |
14e99b4a DW |
626 | "%s: invalid state %s\n", __func__, |
627 | rnc_state_name(state)); | |
ed3efb77 DW |
628 | return SCI_FAILURE_INVALID_STATE; |
629 | } | |
59e35396 | 630 | sci_rnc->destination_state = dest_param; |
447bfbce JS |
631 | sci_rnc->suspend_type = suspend_type; |
632 | sci_rnc->suspend_reason = suspend_reason; | |
ed3efb77 | 633 | |
ac78ed0f | 634 | if (status == SCI_SUCCESS) { /* Already in the destination state? */ |
726980d5 JS |
635 | struct isci_host *ihost = idev->owning_port->owning_controller; |
636 | ||
726980d5 | 637 | wake_up_all(&ihost->eventq); /* Let observers look. */ |
ac78ed0f JS |
638 | return SCI_SUCCESS; |
639 | } | |
c94fc1ad JS |
640 | if ((suspend_reason == SCI_SW_SUSPEND_NORMAL) || |
641 | (suspend_reason == SCI_SW_SUSPEND_LINKHANG_DETECT)) { | |
642 | ||
9608b640 | 643 | if (suspend_reason == SCI_SW_SUSPEND_LINKHANG_DETECT) |
c94fc1ad JS |
644 | isci_dev_set_hang_detection_timeout(idev, 0x00000001); |
645 | ||
ac78ed0f JS |
646 | sci_remote_device_post_request( |
647 | idev, SCI_SOFTWARE_SUSPEND_CMD); | |
ed3efb77 | 648 | } |
ac78ed0f JS |
649 | if (state != SCI_RNC_AWAIT_SUSPENSION) |
650 | sci_change_state(&sci_rnc->sm, SCI_RNC_AWAIT_SUSPENSION); | |
ed3efb77 | 651 | |
ed3efb77 DW |
652 | return SCI_SUCCESS; |
653 | } | |
654 | ||
89a7301f | 655 | enum sci_status sci_remote_node_context_resume(struct sci_remote_node_context *sci_rnc, |
ed3efb77 DW |
656 | scics_sds_remote_node_context_callback cb_fn, |
657 | void *cb_p) | |
658 | { | |
659 | enum scis_sds_remote_node_context_states state; | |
0c3ce38f | 660 | struct isci_remote_device *idev = rnc_to_dev(sci_rnc); |
ed3efb77 | 661 | |
e301370a | 662 | state = sci_rnc->sm.current_state_id; |
0c3ce38f JS |
663 | dev_dbg(scirdev_to_dev(idev), |
664 | "%s: state %s, cb_fn = %p, cb_p = %p; dest_state = %d; " | |
665 | "dev resume path %s\n", | |
666 | __func__, rnc_state_name(state), cb_fn, cb_p, | |
667 | sci_rnc->destination_state, | |
668 | test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags) | |
669 | ? "<abort active>" : "<normal>"); | |
31a38ef0 | 670 | |
ed3efb77 | 671 | switch (state) { |
e301370a | 672 | case SCI_RNC_INITIAL: |
ed3efb77 DW |
673 | if (sci_rnc->remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) |
674 | return SCI_FAILURE_INVALID_STATE; | |
675 | ||
6c6aacbb JS |
676 | sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p, |
677 | RNC_DEST_READY); | |
678 | if (!test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)) { | |
0c3ce38f JS |
679 | sci_remote_node_context_construct_buffer(sci_rnc); |
680 | sci_change_state(&sci_rnc->sm, SCI_RNC_POSTING); | |
681 | } | |
ed3efb77 | 682 | return SCI_SUCCESS; |
0c3ce38f | 683 | |
e301370a EN |
684 | case SCI_RNC_POSTING: |
685 | case SCI_RNC_INVALIDATING: | |
686 | case SCI_RNC_RESUMING: | |
6c6aacbb JS |
687 | /* We are still waiting to post when a resume was |
688 | * requested. | |
689 | */ | |
690 | switch (sci_rnc->destination_state) { | |
691 | case RNC_DEST_SUSPENDED: | |
692 | case RNC_DEST_SUSPENDED_RESUME: | |
693 | /* Previously waiting to suspend after posting. | |
694 | * Now continue onto resumption. | |
59e35396 | 695 | */ |
6c6aacbb JS |
696 | sci_remote_node_context_setup_to_resume( |
697 | sci_rnc, cb_fn, cb_p, | |
698 | RNC_DEST_SUSPENDED_RESUME); | |
699 | break; | |
700 | default: | |
701 | sci_remote_node_context_setup_to_resume( | |
702 | sci_rnc, cb_fn, cb_p, | |
703 | RNC_DEST_READY); | |
704 | break; | |
59e35396 | 705 | } |
ed3efb77 | 706 | return SCI_SUCCESS; |
0c3ce38f | 707 | |
56d7c013 | 708 | case SCI_RNC_TX_SUSPENDED: |
0c3ce38f | 709 | case SCI_RNC_TX_RX_SUSPENDED: |
6c6aacbb | 710 | { |
0c3ce38f JS |
711 | struct domain_device *dev = idev->domain_dev; |
712 | /* If this is an expander attached SATA device we must | |
713 | * invalidate and repost the RNC since this is the only | |
714 | * way to clear the TCi to NCQ tag mapping table for | |
715 | * the RNi. All other device types we can just resume. | |
716 | */ | |
717 | sci_remote_node_context_setup_to_resume( | |
718 | sci_rnc, cb_fn, cb_p, RNC_DEST_READY); | |
ed3efb77 | 719 | |
6c6aacbb JS |
720 | if (!test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)) { |
721 | if ((dev_is_sata(dev) && dev->parent) || | |
722 | (sci_rnc->destination_state == RNC_DEST_FINAL)) | |
723 | sci_change_state(&sci_rnc->sm, | |
724 | SCI_RNC_INVALIDATING); | |
725 | else | |
726 | sci_change_state(&sci_rnc->sm, | |
727 | SCI_RNC_RESUMING); | |
728 | } | |
0c3ce38f | 729 | } |
ed3efb77 | 730 | return SCI_SUCCESS; |
0c3ce38f | 731 | |
e301370a | 732 | case SCI_RNC_AWAIT_SUSPENSION: |
6c6aacbb JS |
733 | sci_remote_node_context_setup_to_resume( |
734 | sci_rnc, cb_fn, cb_p, RNC_DEST_SUSPENDED_RESUME); | |
ed3efb77 DW |
735 | return SCI_SUCCESS; |
736 | default: | |
737 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
14e99b4a DW |
738 | "%s: invalid state %s\n", __func__, |
739 | rnc_state_name(state)); | |
ed3efb77 DW |
740 | return SCI_FAILURE_INVALID_STATE; |
741 | } | |
742 | } | |
f34d9e5d | 743 | |
89a7301f | 744 | enum sci_status sci_remote_node_context_start_io(struct sci_remote_node_context *sci_rnc, |
5076a1a9 | 745 | struct isci_request *ireq) |
f34d9e5d DW |
746 | { |
747 | enum scis_sds_remote_node_context_states state; | |
748 | ||
e301370a | 749 | state = sci_rnc->sm.current_state_id; |
fd536601 JS |
750 | |
751 | switch (state) { | |
752 | case SCI_RNC_READY: | |
753 | return SCI_SUCCESS; | |
754 | case SCI_RNC_TX_SUSPENDED: | |
755 | case SCI_RNC_TX_RX_SUSPENDED: | |
756 | case SCI_RNC_AWAIT_SUSPENSION: | |
f34d9e5d | 757 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), |
14e99b4a DW |
758 | "%s: invalid state %s\n", __func__, |
759 | rnc_state_name(state)); | |
f34d9e5d | 760 | return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED; |
fd536601 | 761 | default: |
14e99b4a DW |
762 | dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)), |
763 | "%s: invalid state %s\n", __func__, | |
764 | rnc_state_name(state)); | |
765 | return SCI_FAILURE_INVALID_STATE; | |
f34d9e5d | 766 | } |
f34d9e5d DW |
767 | } |
768 | ||
14aaa9f0 JS |
769 | enum sci_status sci_remote_node_context_start_task( |
770 | struct sci_remote_node_context *sci_rnc, | |
771 | struct isci_request *ireq, | |
772 | scics_sds_remote_node_context_callback cb_fn, | |
773 | void *cb_p) | |
f34d9e5d | 774 | { |
59e35396 JS |
775 | enum sci_status status = sci_remote_node_context_resume(sci_rnc, |
776 | cb_fn, cb_p); | |
777 | if (status != SCI_SUCCESS) | |
f34d9e5d | 778 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), |
59e35396 JS |
779 | "%s: resume failed: %d\n", __func__, status); |
780 | return status; | |
f34d9e5d | 781 | } |
726980d5 JS |
782 | |
783 | int sci_remote_node_context_is_safe_to_abort( | |
784 | struct sci_remote_node_context *sci_rnc) | |
785 | { | |
786 | enum scis_sds_remote_node_context_states state; | |
787 | ||
788 | state = sci_rnc->sm.current_state_id; | |
789 | switch (state) { | |
790 | case SCI_RNC_INVALIDATING: | |
791 | case SCI_RNC_TX_RX_SUSPENDED: | |
792 | return 1; | |
793 | case SCI_RNC_POSTING: | |
794 | case SCI_RNC_RESUMING: | |
795 | case SCI_RNC_READY: | |
796 | case SCI_RNC_TX_SUSPENDED: | |
797 | case SCI_RNC_AWAIT_SUSPENSION: | |
798 | case SCI_RNC_INITIAL: | |
799 | return 0; | |
800 | default: | |
801 | dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)), | |
802 | "%s: invalid state %d\n", __func__, state); | |
803 | return 0; | |
804 | } | |
805 | } |