Commit | Line | Data |
---|---|---|
bb1b0133 TW |
1 | /* |
2 | * | |
3 | * Intel Management Engine Interface (Intel MEI) Linux driver | |
4 | * Copyright (c) 2003-2012, Intel Corporation. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | */ | |
16 | ||
4fcbc99b | 17 | #include <linux/export.h> |
bb1b0133 TW |
18 | #include <linux/sched.h> |
19 | #include <linux/wait.h> | |
180ea05b | 20 | #include <linux/pm_runtime.h> |
1f180359 TW |
21 | #include <linux/slab.h> |
22 | ||
23 | #include <linux/mei.h> | |
bb1b0133 TW |
24 | |
25 | #include "mei_dev.h" | |
0edb23fc | 26 | #include "hbm.h" |
12d00665 | 27 | #include "client.h" |
bb1b0133 | 28 | |
89778d6e TW |
29 | static const char *mei_hbm_status_str(enum mei_hbm_status status) |
30 | { | |
31 | #define MEI_HBM_STATUS(status) case MEI_HBMS_##status: return #status | |
32 | switch (status) { | |
33 | MEI_HBM_STATUS(SUCCESS); | |
34 | MEI_HBM_STATUS(CLIENT_NOT_FOUND); | |
35 | MEI_HBM_STATUS(ALREADY_EXISTS); | |
36 | MEI_HBM_STATUS(REJECTED); | |
37 | MEI_HBM_STATUS(INVALID_PARAMETER); | |
38 | MEI_HBM_STATUS(NOT_ALLOWED); | |
39 | MEI_HBM_STATUS(ALREADY_STARTED); | |
40 | MEI_HBM_STATUS(NOT_STARTED); | |
41 | default: return "unknown"; | |
42 | } | |
43 | #undef MEI_HBM_STATUS | |
44 | }; | |
45 | ||
285e2996 AU |
46 | static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status) |
47 | { | |
48 | #define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status | |
49 | switch (status) { | |
50 | MEI_CL_CS(SUCCESS); | |
51 | MEI_CL_CS(NOT_FOUND); | |
52 | MEI_CL_CS(ALREADY_STARTED); | |
53 | MEI_CL_CS(OUT_OF_RESOURCES); | |
54 | MEI_CL_CS(MESSAGE_SMALL); | |
55 | default: return "unknown"; | |
56 | } | |
57 | #undef MEI_CL_CCS | |
58 | } | |
59 | ||
1beeb4b9 AU |
60 | const char *mei_hbm_state_str(enum mei_hbm_state state) |
61 | { | |
62 | #define MEI_HBM_STATE(state) case MEI_HBM_##state: return #state | |
63 | switch (state) { | |
64 | MEI_HBM_STATE(IDLE); | |
65 | MEI_HBM_STATE(STARTING); | |
66 | MEI_HBM_STATE(STARTED); | |
67 | MEI_HBM_STATE(ENUM_CLIENTS); | |
68 | MEI_HBM_STATE(CLIENT_PROPERTIES); | |
69 | MEI_HBM_STATE(STOPPED); | |
70 | default: | |
71 | return "unknown"; | |
72 | } | |
73 | #undef MEI_HBM_STATE | |
74 | } | |
75 | ||
285e2996 AU |
76 | /** |
77 | * mei_cl_conn_status_to_errno - convert client connect response | |
78 | * status to error code | |
79 | * | |
80 | * @status: client connect response status | |
81 | * | |
a8605ea2 | 82 | * Return: corresponding error code |
285e2996 AU |
83 | */ |
84 | static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status) | |
85 | { | |
86 | switch (status) { | |
87 | case MEI_CL_CONN_SUCCESS: return 0; | |
88 | case MEI_CL_CONN_NOT_FOUND: return -ENOTTY; | |
89 | case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY; | |
90 | case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY; | |
91 | case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL; | |
92 | default: return -EINVAL; | |
93 | } | |
94 | } | |
95 | ||
84b3294a TW |
96 | /** |
97 | * mei_hbm_idle - set hbm to idle state | |
98 | * | |
99 | * @dev: the device structure | |
100 | */ | |
101 | void mei_hbm_idle(struct mei_device *dev) | |
102 | { | |
103 | dev->init_clients_timer = 0; | |
104 | dev->hbm_state = MEI_HBM_IDLE; | |
105 | } | |
106 | ||
25ca6472 TW |
107 | /** |
108 | * mei_hbm_reset - reset hbm counters and book keeping data structurs | |
109 | * | |
110 | * @dev: the device structure | |
111 | */ | |
112 | void mei_hbm_reset(struct mei_device *dev) | |
113 | { | |
84b3294a TW |
114 | dev->me_client_index = 0; |
115 | ||
79563db9 | 116 | mei_me_cl_rm_all(dev); |
84b3294a TW |
117 | |
118 | mei_hbm_idle(dev); | |
119 | } | |
120 | ||
2190fe2a TW |
121 | /** |
122 | * mei_hbm_hdr - construct hbm header | |
123 | * | |
124 | * @hdr: hbm header | |
125 | * @length: payload length | |
126 | */ | |
127 | ||
128 | static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length) | |
129 | { | |
130 | hdr->host_addr = 0; | |
131 | hdr->me_addr = 0; | |
132 | hdr->length = length; | |
133 | hdr->msg_complete = 1; | |
134 | hdr->reserved = 0; | |
135 | } | |
136 | ||
cd51ed64 TW |
137 | /** |
138 | * mei_hbm_cl_hdr - construct client hbm header | |
393b148f | 139 | * |
68d1aa65 | 140 | * @cl: client |
cd51ed64 TW |
141 | * @hbm_cmd: host bus message command |
142 | * @buf: buffer for cl header | |
143 | * @len: buffer length | |
144 | */ | |
145 | static inline | |
146 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) | |
147 | { | |
148 | struct mei_hbm_cl_cmd *cmd = buf; | |
149 | ||
150 | memset(cmd, 0, len); | |
151 | ||
152 | cmd->hbm_cmd = hbm_cmd; | |
153 | cmd->host_addr = cl->host_client_id; | |
d49ed64a | 154 | cmd->me_addr = mei_cl_me_id(cl); |
cd51ed64 TW |
155 | } |
156 | ||
68d1aa65 TW |
157 | /** |
158 | * mei_hbm_cl_write - write simple hbm client message | |
159 | * | |
160 | * @dev: the device structure | |
161 | * @cl: client | |
162 | * @hbm_cmd: host bus message command | |
163 | * @len: buffer length | |
ce23139c AU |
164 | * |
165 | * Return: 0 on success, <0 on failure. | |
68d1aa65 TW |
166 | */ |
167 | static inline | |
168 | int mei_hbm_cl_write(struct mei_device *dev, | |
169 | struct mei_cl *cl, u8 hbm_cmd, size_t len) | |
170 | { | |
171 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
172 | ||
173 | mei_hbm_hdr(mei_hdr, len); | |
174 | mei_hbm_cl_hdr(cl, hbm_cmd, dev->wr_msg.data, len); | |
175 | ||
176 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
177 | } | |
178 | ||
cd51ed64 | 179 | /** |
2af89db1 TW |
180 | * mei_hbm_cl_addr_equal - check if the client's and |
181 | * the message address match | |
cd51ed64 | 182 | * |
2af89db1 TW |
183 | * @cl: client |
184 | * @cmd: hbm client message | |
cd51ed64 | 185 | * |
a8605ea2 | 186 | * Return: true if addresses are the same |
cd51ed64 TW |
187 | */ |
188 | static inline | |
2af89db1 | 189 | bool mei_hbm_cl_addr_equal(struct mei_cl *cl, struct mei_hbm_cl_cmd *cmd) |
cd51ed64 | 190 | { |
cd51ed64 | 191 | return cl->host_client_id == cmd->host_addr && |
d49ed64a | 192 | mei_cl_me_id(cl) == cmd->me_addr; |
cd51ed64 TW |
193 | } |
194 | ||
2af89db1 TW |
195 | /** |
196 | * mei_hbm_cl_find_by_cmd - find recipient client | |
197 | * | |
198 | * @dev: the device structure | |
199 | * @buf: a buffer with hbm cl command | |
200 | * | |
a8605ea2 | 201 | * Return: the recipient client or NULL if not found |
2af89db1 TW |
202 | */ |
203 | static inline | |
204 | struct mei_cl *mei_hbm_cl_find_by_cmd(struct mei_device *dev, void *buf) | |
205 | { | |
206 | struct mei_hbm_cl_cmd *cmd = (struct mei_hbm_cl_cmd *)buf; | |
207 | struct mei_cl *cl; | |
208 | ||
209 | list_for_each_entry(cl, &dev->file_list, link) | |
210 | if (mei_hbm_cl_addr_equal(cl, cmd)) | |
211 | return cl; | |
212 | return NULL; | |
213 | } | |
214 | ||
215 | ||
cb02efc3 AU |
216 | /** |
217 | * mei_hbm_start_wait - wait for start response message. | |
218 | * | |
219 | * @dev: the device structure | |
220 | * | |
a8605ea2 | 221 | * Return: 0 on success and < 0 on failure |
cb02efc3 | 222 | */ |
9b0d5efc TW |
223 | int mei_hbm_start_wait(struct mei_device *dev) |
224 | { | |
225 | int ret; | |
cb02efc3 AU |
226 | |
227 | if (dev->hbm_state > MEI_HBM_STARTING) | |
9b0d5efc TW |
228 | return 0; |
229 | ||
230 | mutex_unlock(&dev->device_lock); | |
cb02efc3 AU |
231 | ret = wait_event_timeout(dev->wait_hbm_start, |
232 | dev->hbm_state != MEI_HBM_STARTING, | |
7d93e58d | 233 | mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); |
9b0d5efc TW |
234 | mutex_lock(&dev->device_lock); |
235 | ||
cb02efc3 | 236 | if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) { |
9b0d5efc | 237 | dev->hbm_state = MEI_HBM_IDLE; |
2bf94cab | 238 | dev_err(dev->dev, "waiting for mei start failed\n"); |
7ca96aa2 | 239 | return -ETIME; |
9b0d5efc TW |
240 | } |
241 | return 0; | |
242 | } | |
243 | ||
bb1b0133 | 244 | /** |
8120e720 | 245 | * mei_hbm_start_req - sends start request message. |
bb1b0133 TW |
246 | * |
247 | * @dev: the device structure | |
544f9460 | 248 | * |
a8605ea2 | 249 | * Return: 0 on success and < 0 on failure |
bb1b0133 | 250 | */ |
9b0d5efc | 251 | int mei_hbm_start_req(struct mei_device *dev) |
bb1b0133 | 252 | { |
e46f1874 | 253 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
254 | struct hbm_host_version_request *start_req; |
255 | const size_t len = sizeof(struct hbm_host_version_request); | |
544f9460 | 256 | int ret; |
bb1b0133 | 257 | |
5ca2d388 TW |
258 | mei_hbm_reset(dev); |
259 | ||
e46f1874 | 260 | mei_hbm_hdr(mei_hdr, len); |
bb1b0133 TW |
261 | |
262 | /* host start message */ | |
e46f1874 | 263 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
bb1b0133 TW |
264 | memset(start_req, 0, len); |
265 | start_req->hbm_cmd = HOST_START_REQ_CMD; | |
266 | start_req->host_version.major_version = HBM_MAJOR_VERSION; | |
267 | start_req->host_version.minor_version = HBM_MINOR_VERSION; | |
268 | ||
9b0d5efc | 269 | dev->hbm_state = MEI_HBM_IDLE; |
544f9460 TW |
270 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
271 | if (ret) { | |
2bf94cab | 272 | dev_err(dev->dev, "version message write failed: ret = %d\n", |
544f9460 TW |
273 | ret); |
274 | return ret; | |
bb1b0133 | 275 | } |
544f9460 | 276 | |
cb02efc3 | 277 | dev->hbm_state = MEI_HBM_STARTING; |
bb1b0133 | 278 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
9b0d5efc | 279 | return 0; |
bb1b0133 TW |
280 | } |
281 | ||
9b0d5efc | 282 | /* |
8120e720 | 283 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
bb1b0133 TW |
284 | * |
285 | * @dev: the device structure | |
286 | * | |
a8605ea2 | 287 | * Return: 0 on success and < 0 on failure |
bb1b0133 | 288 | */ |
544f9460 | 289 | static int mei_hbm_enum_clients_req(struct mei_device *dev) |
bb1b0133 | 290 | { |
e46f1874 | 291 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
292 | struct hbm_host_enum_request *enum_req; |
293 | const size_t len = sizeof(struct hbm_host_enum_request); | |
544f9460 TW |
294 | int ret; |
295 | ||
bb1b0133 | 296 | /* enumerate clients */ |
e46f1874 | 297 | mei_hbm_hdr(mei_hdr, len); |
bb1b0133 | 298 | |
e46f1874 TW |
299 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
300 | memset(enum_req, 0, len); | |
bb1b0133 TW |
301 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
302 | ||
544f9460 TW |
303 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
304 | if (ret) { | |
2bf94cab | 305 | dev_err(dev->dev, "enumeration request write failed: ret = %d.\n", |
544f9460 TW |
306 | ret); |
307 | return ret; | |
bb1b0133 | 308 | } |
9b0d5efc | 309 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
bb1b0133 | 310 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
544f9460 | 311 | return 0; |
bb1b0133 TW |
312 | } |
313 | ||
5ca2d388 TW |
314 | /* |
315 | * mei_hbm_me_cl_add - add new me client to the list | |
316 | * | |
317 | * @dev: the device structure | |
318 | * @res: hbm property response | |
319 | * | |
a8605ea2 | 320 | * Return: 0 on success and -ENOMEM on allocation failure |
5ca2d388 TW |
321 | */ |
322 | ||
323 | static int mei_hbm_me_cl_add(struct mei_device *dev, | |
324 | struct hbm_props_response *res) | |
325 | { | |
326 | struct mei_me_client *me_cl; | |
79563db9 TW |
327 | const uuid_le *uuid = &res->client_properties.protocol_name; |
328 | ||
329 | mei_me_cl_rm_by_uuid(dev, uuid); | |
5ca2d388 TW |
330 | |
331 | me_cl = kzalloc(sizeof(struct mei_me_client), GFP_KERNEL); | |
332 | if (!me_cl) | |
333 | return -ENOMEM; | |
334 | ||
79563db9 TW |
335 | mei_me_cl_init(me_cl); |
336 | ||
5ca2d388 TW |
337 | me_cl->props = res->client_properties; |
338 | me_cl->client_id = res->me_addr; | |
339 | me_cl->mei_flow_ctrl_creds = 0; | |
340 | ||
b7d88514 TW |
341 | mei_me_cl_add(dev, me_cl); |
342 | ||
5ca2d388 TW |
343 | return 0; |
344 | } | |
345 | ||
8120e720 | 346 | /** |
393b148f | 347 | * mei_hbm_prop_req - request property for a single client |
8120e720 TW |
348 | * |
349 | * @dev: the device structure | |
350 | * | |
a8605ea2 | 351 | * Return: 0 on success and < 0 on failure |
8120e720 | 352 | */ |
bb1b0133 | 353 | |
8120e720 | 354 | static int mei_hbm_prop_req(struct mei_device *dev) |
bb1b0133 TW |
355 | { |
356 | ||
e46f1874 | 357 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
358 | struct hbm_props_request *prop_req; |
359 | const size_t len = sizeof(struct hbm_props_request); | |
360 | unsigned long next_client_index; | |
544f9460 | 361 | int ret; |
bb1b0133 | 362 | |
bb1b0133 TW |
363 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
364 | dev->me_client_index); | |
365 | ||
366 | /* We got all client properties */ | |
367 | if (next_client_index == MEI_CLIENTS_MAX) { | |
9b0d5efc | 368 | dev->hbm_state = MEI_HBM_STARTED; |
bb1b0133 TW |
369 | schedule_work(&dev->init_work); |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
e46f1874 TW |
374 | mei_hbm_hdr(mei_hdr, len); |
375 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; | |
bb1b0133 TW |
376 | |
377 | memset(prop_req, 0, sizeof(struct hbm_props_request)); | |
378 | ||
bb1b0133 | 379 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
3438c1f3 | 380 | prop_req->me_addr = next_client_index; |
bb1b0133 | 381 | |
544f9460 TW |
382 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
383 | if (ret) { | |
2bf94cab | 384 | dev_err(dev->dev, "properties request write failed: ret = %d\n", |
544f9460 TW |
385 | ret); |
386 | return ret; | |
bb1b0133 TW |
387 | } |
388 | ||
389 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; | |
390 | dev->me_client_index = next_client_index; | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
4fcbc99b TW |
395 | /* |
396 | * mei_hbm_pg - sends pg command | |
397 | * | |
398 | * @dev: the device structure | |
399 | * @pg_cmd: the pg command code | |
400 | * | |
a8605ea2 | 401 | * Return: -EIO on write failure |
bae1cc7d | 402 | * -EOPNOTSUPP if the operation is not supported by the protocol |
4fcbc99b TW |
403 | */ |
404 | int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) | |
405 | { | |
406 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
407 | struct hbm_power_gate *req; | |
408 | const size_t len = sizeof(struct hbm_power_gate); | |
409 | int ret; | |
410 | ||
bae1cc7d TW |
411 | if (!dev->hbm_f_pg_supported) |
412 | return -EOPNOTSUPP; | |
413 | ||
4fcbc99b TW |
414 | mei_hbm_hdr(mei_hdr, len); |
415 | ||
416 | req = (struct hbm_power_gate *)dev->wr_msg.data; | |
417 | memset(req, 0, len); | |
418 | req->hbm_cmd = pg_cmd; | |
419 | ||
420 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
421 | if (ret) | |
2bf94cab | 422 | dev_err(dev->dev, "power gate command write failed.\n"); |
4fcbc99b TW |
423 | return ret; |
424 | } | |
425 | EXPORT_SYMBOL_GPL(mei_hbm_pg); | |
426 | ||
e46f1874 | 427 | /** |
6bb948c9 | 428 | * mei_hbm_stop_req - send stop request message |
e46f1874 | 429 | * |
a8605ea2 | 430 | * @dev: mei device |
6bb948c9 | 431 | * |
a8605ea2 | 432 | * Return: -EIO on write failure |
e46f1874 | 433 | */ |
6bb948c9 | 434 | static int mei_hbm_stop_req(struct mei_device *dev) |
e46f1874 | 435 | { |
6bb948c9 | 436 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
e46f1874 | 437 | struct hbm_host_stop_request *req = |
6bb948c9 | 438 | (struct hbm_host_stop_request *)dev->wr_msg.data; |
e46f1874 TW |
439 | const size_t len = sizeof(struct hbm_host_stop_request); |
440 | ||
441 | mei_hbm_hdr(mei_hdr, len); | |
442 | ||
443 | memset(req, 0, len); | |
444 | req->hbm_cmd = HOST_STOP_REQ_CMD; | |
445 | req->reason = DRIVER_STOP_REQUEST; | |
6bb948c9 TW |
446 | |
447 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
e46f1874 TW |
448 | } |
449 | ||
bb1b0133 | 450 | /** |
83ce0741 | 451 | * mei_hbm_cl_flow_control_req - sends flow control request. |
bb1b0133 TW |
452 | * |
453 | * @dev: the device structure | |
8120e720 | 454 | * @cl: client info |
bb1b0133 | 455 | * |
a8605ea2 | 456 | * Return: -EIO on write failure |
bb1b0133 | 457 | */ |
8120e720 | 458 | int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 459 | { |
bb1b0133 | 460 | const size_t len = sizeof(struct hbm_flow_control); |
92db1555 | 461 | |
46922186 | 462 | cl_dbg(dev, cl, "sending flow control\n"); |
68d1aa65 | 463 | return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, len); |
bb1b0133 TW |
464 | } |
465 | ||
6bbda15f | 466 | /** |
393b148f | 467 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
6bbda15f | 468 | * |
393b148f | 469 | * @dev: the device structure |
6bbda15f | 470 | * @flow: flow control. |
12d00665 | 471 | * |
a8605ea2 | 472 | * Return: 0 on success, < 0 otherwise |
6bbda15f | 473 | */ |
12d00665 | 474 | static int mei_hbm_add_single_flow_creds(struct mei_device *dev, |
6bbda15f TW |
475 | struct hbm_flow_control *flow) |
476 | { | |
12d00665 | 477 | struct mei_me_client *me_cl; |
79563db9 | 478 | int rets; |
12d00665 | 479 | |
d320832f TW |
480 | me_cl = mei_me_cl_by_id(dev, flow->me_addr); |
481 | if (!me_cl) { | |
2bf94cab | 482 | dev_err(dev->dev, "no such me client %d\n", |
12d00665 | 483 | flow->me_addr); |
d320832f | 484 | return -ENOENT; |
12d00665 AU |
485 | } |
486 | ||
79563db9 TW |
487 | if (WARN_ON(me_cl->props.single_recv_buf == 0)) { |
488 | rets = -EINVAL; | |
489 | goto out; | |
490 | } | |
d320832f TW |
491 | |
492 | me_cl->mei_flow_ctrl_creds++; | |
2bf94cab | 493 | dev_dbg(dev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n", |
d320832f | 494 | flow->me_addr, me_cl->mei_flow_ctrl_creds); |
12d00665 | 495 | |
79563db9 TW |
496 | rets = 0; |
497 | out: | |
498 | mei_me_cl_put(me_cl); | |
499 | return rets; | |
6bbda15f TW |
500 | } |
501 | ||
502 | /** | |
503 | * mei_hbm_cl_flow_control_res - flow control response from me | |
504 | * | |
505 | * @dev: the device structure | |
506 | * @flow_control: flow control response bus message | |
507 | */ | |
508 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, | |
2af89db1 | 509 | struct hbm_flow_control *flow_control) |
6bbda15f | 510 | { |
31f88f57 | 511 | struct mei_cl *cl; |
6bbda15f TW |
512 | |
513 | if (!flow_control->host_addr) { | |
514 | /* single receive buffer */ | |
515 | mei_hbm_add_single_flow_creds(dev, flow_control); | |
516 | return; | |
517 | } | |
518 | ||
2af89db1 TW |
519 | cl = mei_hbm_cl_find_by_cmd(dev, flow_control); |
520 | if (cl) { | |
521 | cl->mei_flow_ctrl_creds++; | |
522 | cl_dbg(dev, cl, "flow control creds = %d.\n", | |
5ca2d388 | 523 | cl->mei_flow_ctrl_creds); |
6bbda15f TW |
524 | } |
525 | } | |
526 | ||
527 | ||
bb1b0133 | 528 | /** |
8120e720 | 529 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
bb1b0133 TW |
530 | * |
531 | * @dev: the device structure | |
8120e720 | 532 | * @cl: a client to disconnect from |
bb1b0133 | 533 | * |
a8605ea2 | 534 | * Return: -EIO on write failure |
bb1b0133 | 535 | */ |
8120e720 | 536 | int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 537 | { |
bb1b0133 | 538 | const size_t len = sizeof(struct hbm_client_connect_request); |
92db1555 | 539 | |
68d1aa65 | 540 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, len); |
bb1b0133 TW |
541 | } |
542 | ||
6bb948c9 TW |
543 | /** |
544 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW | |
545 | * | |
546 | * @dev: the device structure | |
547 | * @cl: a client to disconnect from | |
548 | * | |
a8605ea2 | 549 | * Return: -EIO on write failure |
6bb948c9 TW |
550 | */ |
551 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) | |
552 | { | |
6bb948c9 | 553 | const size_t len = sizeof(struct hbm_client_connect_response); |
92db1555 | 554 | |
68d1aa65 | 555 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, len); |
6bb948c9 TW |
556 | } |
557 | ||
6bbda15f | 558 | /** |
12f45ed4 TW |
559 | * mei_hbm_cl_disconnect_res - update the client state according |
560 | * disconnect response | |
6bbda15f | 561 | * |
d512c209 | 562 | * @dev: the device structure |
12f45ed4 TW |
563 | * @cl: mei host client |
564 | * @cmd: disconnect client response host bus message | |
6bbda15f | 565 | */ |
d512c209 | 566 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct mei_cl *cl, |
12f45ed4 | 567 | struct mei_hbm_cl_cmd *cmd) |
6bbda15f | 568 | { |
12f45ed4 TW |
569 | struct hbm_client_connect_response *rs = |
570 | (struct hbm_client_connect_response *)cmd; | |
6bbda15f | 571 | |
d512c209 | 572 | cl_dbg(dev, cl, "hbm: disconnect response status=%d\n", rs->status); |
6bbda15f | 573 | |
12f45ed4 | 574 | if (rs->status == MEI_CL_DISCONN_SUCCESS) |
3c666182 | 575 | cl->state = MEI_FILE_DISCONNECT_REPLY; |
12f45ed4 | 576 | cl->status = 0; |
6bbda15f TW |
577 | } |
578 | ||
bb1b0133 | 579 | /** |
8120e720 | 580 | * mei_hbm_cl_connect_req - send connection request to specific me client |
bb1b0133 TW |
581 | * |
582 | * @dev: the device structure | |
8120e720 | 583 | * @cl: a client to connect to |
bb1b0133 | 584 | * |
a8605ea2 | 585 | * Return: -EIO on write failure |
bb1b0133 | 586 | */ |
8120e720 | 587 | int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 588 | { |
bb1b0133 | 589 | const size_t len = sizeof(struct hbm_client_connect_request); |
92db1555 | 590 | |
68d1aa65 | 591 | return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, len); |
bb1b0133 TW |
592 | } |
593 | ||
6bbda15f | 594 | /** |
12f45ed4 TW |
595 | * mei_hbm_cl_connect_res - update the client state according |
596 | * connection response | |
6bbda15f | 597 | * |
d512c209 | 598 | * @dev: the device structure |
12f45ed4 TW |
599 | * @cl: mei host client |
600 | * @cmd: connect client response host bus message | |
6bbda15f | 601 | */ |
d512c209 | 602 | static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl, |
12f45ed4 | 603 | struct mei_hbm_cl_cmd *cmd) |
6bbda15f | 604 | { |
12f45ed4 TW |
605 | struct hbm_client_connect_response *rs = |
606 | (struct hbm_client_connect_response *)cmd; | |
6bbda15f | 607 | |
d512c209 | 608 | cl_dbg(dev, cl, "hbm: connect response status=%s\n", |
285e2996 | 609 | mei_cl_conn_status_str(rs->status)); |
6bbda15f | 610 | |
12f45ed4 TW |
611 | if (rs->status == MEI_CL_CONN_SUCCESS) |
612 | cl->state = MEI_FILE_CONNECTED; | |
613 | else | |
3c666182 | 614 | cl->state = MEI_FILE_DISCONNECT_REPLY; |
12f45ed4 TW |
615 | cl->status = mei_cl_conn_status_to_errno(rs->status); |
616 | } | |
617 | ||
618 | /** | |
619 | * mei_hbm_cl_res - process hbm response received on behalf | |
620 | * an client | |
621 | * | |
622 | * @dev: the device structure | |
623 | * @rs: hbm client message | |
624 | * @fop_type: file operation type | |
625 | */ | |
626 | static void mei_hbm_cl_res(struct mei_device *dev, | |
627 | struct mei_hbm_cl_cmd *rs, | |
628 | enum mei_cb_file_ops fop_type) | |
629 | { | |
630 | struct mei_cl *cl; | |
631 | struct mei_cl_cb *cb, *next; | |
6bbda15f | 632 | |
12f45ed4 | 633 | cl = NULL; |
64092858 | 634 | list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { |
6bbda15f | 635 | |
64092858 | 636 | cl = cb->cl; |
6bbda15f | 637 | |
12f45ed4 | 638 | if (cb->fop_type != fop_type) |
64092858 | 639 | continue; |
6bbda15f | 640 | |
64092858 | 641 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
928fa666 | 642 | list_del_init(&cb->list); |
64092858 | 643 | break; |
6bbda15f TW |
644 | } |
645 | } | |
64092858 TW |
646 | |
647 | if (!cl) | |
648 | return; | |
649 | ||
12f45ed4 TW |
650 | switch (fop_type) { |
651 | case MEI_FOP_CONNECT: | |
d512c209 | 652 | mei_hbm_cl_connect_res(dev, cl, rs); |
12f45ed4 TW |
653 | break; |
654 | case MEI_FOP_DISCONNECT: | |
d512c209 | 655 | mei_hbm_cl_disconnect_res(dev, cl, rs); |
12f45ed4 TW |
656 | break; |
657 | default: | |
658 | return; | |
659 | } | |
660 | ||
64092858 | 661 | cl->timer_count = 0; |
12f45ed4 | 662 | wake_up(&cl->wait); |
6bbda15f TW |
663 | } |
664 | ||
665 | ||
bb1b0133 | 666 | /** |
83ce0741 AU |
667 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
668 | * host sends disconnect response | |
bb1b0133 TW |
669 | * |
670 | * @dev: the device structure. | |
8120e720 | 671 | * @disconnect_req: disconnect request bus message from the me |
6bb948c9 | 672 | * |
a8605ea2 | 673 | * Return: -ENOMEM on allocation failure |
bb1b0133 | 674 | */ |
6bb948c9 | 675 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
bb1b0133 TW |
676 | struct hbm_client_connect_request *disconnect_req) |
677 | { | |
31f88f57 | 678 | struct mei_cl *cl; |
6bb948c9 | 679 | struct mei_cl_cb *cb; |
bb1b0133 | 680 | |
2af89db1 TW |
681 | cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req); |
682 | if (cl) { | |
3c666182 TW |
683 | cl_dbg(dev, cl, "fw disconnect request received\n"); |
684 | cl->state = MEI_FILE_DISCONNECTING; | |
2af89db1 TW |
685 | cl->timer_count = 0; |
686 | ||
bca67d68 | 687 | cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT_RSP, NULL); |
2af89db1 TW |
688 | if (!cb) |
689 | return -ENOMEM; | |
2af89db1 TW |
690 | cl_dbg(dev, cl, "add disconnect response as first\n"); |
691 | list_add(&cb->list, &dev->ctrl_wr_list.list); | |
bb1b0133 | 692 | } |
6bb948c9 | 693 | return 0; |
bb1b0133 TW |
694 | } |
695 | ||
bae1cc7d | 696 | /** |
a8605ea2 | 697 | * mei_hbm_config_features - check what hbm features and commands |
bae1cc7d TW |
698 | * are supported by the fw |
699 | * | |
700 | * @dev: the device structure | |
701 | */ | |
702 | static void mei_hbm_config_features(struct mei_device *dev) | |
703 | { | |
704 | /* Power Gating Isolation Support */ | |
705 | dev->hbm_f_pg_supported = 0; | |
706 | if (dev->version.major_version > HBM_MAJOR_VERSION_PGI) | |
707 | dev->hbm_f_pg_supported = 1; | |
708 | ||
709 | if (dev->version.major_version == HBM_MAJOR_VERSION_PGI && | |
710 | dev->version.minor_version >= HBM_MINOR_VERSION_PGI) | |
711 | dev->hbm_f_pg_supported = 1; | |
712 | } | |
bb1b0133 | 713 | |
2c9b48ac TW |
714 | /** |
715 | * mei_hbm_version_is_supported - checks whether the driver can | |
716 | * support the hbm version of the device | |
717 | * | |
718 | * @dev: the device structure | |
a8605ea2 | 719 | * Return: true if driver can support hbm version of the device |
2c9b48ac TW |
720 | */ |
721 | bool mei_hbm_version_is_supported(struct mei_device *dev) | |
722 | { | |
723 | return (dev->version.major_version < HBM_MAJOR_VERSION) || | |
724 | (dev->version.major_version == HBM_MAJOR_VERSION && | |
725 | dev->version.minor_version <= HBM_MINOR_VERSION); | |
726 | } | |
727 | ||
bb1b0133 TW |
728 | /** |
729 | * mei_hbm_dispatch - bottom half read routine after ISR to | |
730 | * handle the read bus message cmd processing. | |
731 | * | |
732 | * @dev: the device structure | |
a8605ea2 | 733 | * @hdr: header of bus message |
544f9460 | 734 | * |
a8605ea2 | 735 | * Return: 0 on success and < 0 on failure |
bb1b0133 | 736 | */ |
544f9460 | 737 | int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) |
bb1b0133 TW |
738 | { |
739 | struct mei_bus_message *mei_msg; | |
bb1b0133 | 740 | struct hbm_host_version_response *version_res; |
bb1b0133 TW |
741 | struct hbm_props_response *props_res; |
742 | struct hbm_host_enum_response *enum_res; | |
bb1b0133 | 743 | |
12f45ed4 TW |
744 | struct mei_hbm_cl_cmd *cl_cmd; |
745 | struct hbm_client_connect_request *disconnect_req; | |
746 | struct hbm_flow_control *flow_control; | |
747 | ||
bb1b0133 TW |
748 | /* read the message to our buffer */ |
749 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); | |
750 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); | |
751 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; | |
12f45ed4 | 752 | cl_cmd = (struct mei_hbm_cl_cmd *)mei_msg; |
bb1b0133 | 753 | |
66ae460b TW |
754 | /* ignore spurious message and prevent reset nesting |
755 | * hbm is put to idle during system reset | |
756 | */ | |
757 | if (dev->hbm_state == MEI_HBM_IDLE) { | |
2bf94cab | 758 | dev_dbg(dev->dev, "hbm: state is idle ignore spurious messages\n"); |
66ae460b TW |
759 | return 0; |
760 | } | |
761 | ||
bb1b0133 TW |
762 | switch (mei_msg->hbm_cmd) { |
763 | case HOST_START_RES_CMD: | |
2bf94cab | 764 | dev_dbg(dev->dev, "hbm: start: response message received.\n"); |
544f9460 TW |
765 | |
766 | dev->init_clients_timer = 0; | |
767 | ||
bb1b0133 | 768 | version_res = (struct hbm_host_version_response *)mei_msg; |
2c9b48ac | 769 | |
2bf94cab | 770 | dev_dbg(dev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", |
2c9b48ac TW |
771 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, |
772 | version_res->me_max_version.major_version, | |
773 | version_res->me_max_version.minor_version); | |
774 | ||
775 | if (version_res->host_version_supported) { | |
776 | dev->version.major_version = HBM_MAJOR_VERSION; | |
777 | dev->version.minor_version = HBM_MINOR_VERSION; | |
778 | } else { | |
779 | dev->version.major_version = | |
780 | version_res->me_max_version.major_version; | |
781 | dev->version.minor_version = | |
782 | version_res->me_max_version.minor_version; | |
783 | } | |
784 | ||
785 | if (!mei_hbm_version_is_supported(dev)) { | |
2bf94cab | 786 | dev_warn(dev->dev, "hbm: start: version mismatch - stopping the driver.\n"); |
bb1b0133 | 787 | |
544f9460 | 788 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 789 | if (mei_hbm_stop_req(dev)) { |
2bf94cab | 790 | dev_err(dev->dev, "hbm: start: failed to send stop request\n"); |
544f9460 TW |
791 | return -EIO; |
792 | } | |
793 | break; | |
794 | } | |
9b0d5efc | 795 | |
bae1cc7d TW |
796 | mei_hbm_config_features(dev); |
797 | ||
544f9460 | 798 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
cb02efc3 | 799 | dev->hbm_state != MEI_HBM_STARTING) { |
2bf94cab | 800 | dev_err(dev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
544f9460 TW |
801 | dev->dev_state, dev->hbm_state); |
802 | return -EPROTO; | |
e46f1874 | 803 | } |
bb1b0133 | 804 | |
544f9460 | 805 | if (mei_hbm_enum_clients_req(dev)) { |
2bf94cab | 806 | dev_err(dev->dev, "hbm: start: failed to send enumeration request\n"); |
544f9460 | 807 | return -EIO; |
bb1b0133 TW |
808 | } |
809 | ||
cb02efc3 | 810 | wake_up(&dev->wait_hbm_start); |
bb1b0133 TW |
811 | break; |
812 | ||
813 | case CLIENT_CONNECT_RES_CMD: | |
2bf94cab | 814 | dev_dbg(dev->dev, "hbm: client connect response: message received.\n"); |
12f45ed4 | 815 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT); |
bb1b0133 TW |
816 | break; |
817 | ||
818 | case CLIENT_DISCONNECT_RES_CMD: | |
2bf94cab | 819 | dev_dbg(dev->dev, "hbm: client disconnect response: message received.\n"); |
12f45ed4 | 820 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT); |
bb1b0133 TW |
821 | break; |
822 | ||
823 | case MEI_FLOW_CONTROL_CMD: | |
2bf94cab | 824 | dev_dbg(dev->dev, "hbm: client flow control response: message received.\n"); |
544f9460 | 825 | |
bb1b0133 | 826 | flow_control = (struct hbm_flow_control *) mei_msg; |
6bbda15f | 827 | mei_hbm_cl_flow_control_res(dev, flow_control); |
bb1b0133 TW |
828 | break; |
829 | ||
4fcbc99b | 830 | case MEI_PG_ISOLATION_ENTRY_RES_CMD: |
2bf94cab | 831 | dev_dbg(dev->dev, "power gate isolation entry response received\n"); |
ba9cdd0e | 832 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
4fcbc99b TW |
833 | if (waitqueue_active(&dev->wait_pg)) |
834 | wake_up(&dev->wait_pg); | |
835 | break; | |
836 | ||
837 | case MEI_PG_ISOLATION_EXIT_REQ_CMD: | |
2bf94cab | 838 | dev_dbg(dev->dev, "power gate isolation exit request received\n"); |
ba9cdd0e | 839 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
4fcbc99b TW |
840 | if (waitqueue_active(&dev->wait_pg)) |
841 | wake_up(&dev->wait_pg); | |
180ea05b TW |
842 | else |
843 | /* | |
844 | * If the driver is not waiting on this then | |
845 | * this is HW initiated exit from PG. | |
846 | * Start runtime pm resume sequence to exit from PG. | |
847 | */ | |
2bf94cab | 848 | pm_request_resume(dev->dev); |
4fcbc99b TW |
849 | break; |
850 | ||
bb1b0133 | 851 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
2bf94cab | 852 | dev_dbg(dev->dev, "hbm: properties response: message received.\n"); |
544f9460 TW |
853 | |
854 | dev->init_clients_timer = 0; | |
855 | ||
5ca2d388 TW |
856 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
857 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { | |
2bf94cab | 858 | dev_err(dev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
5ca2d388 | 859 | dev->dev_state, dev->hbm_state); |
544f9460 TW |
860 | return -EPROTO; |
861 | } | |
862 | ||
bb1b0133 | 863 | props_res = (struct hbm_props_response *)mei_msg; |
bb1b0133 | 864 | |
544f9460 | 865 | if (props_res->status) { |
2bf94cab | 866 | dev_err(dev->dev, "hbm: properties response: wrong status = %d %s\n", |
89778d6e TW |
867 | props_res->status, |
868 | mei_hbm_status_str(props_res->status)); | |
544f9460 | 869 | return -EPROTO; |
bb1b0133 TW |
870 | } |
871 | ||
5ca2d388 | 872 | mei_hbm_me_cl_add(dev, props_res); |
bb1b0133 | 873 | |
bb1b0133 | 874 | dev->me_client_index++; |
bb1b0133 | 875 | |
8120e720 | 876 | /* request property for the next client */ |
544f9460 TW |
877 | if (mei_hbm_prop_req(dev)) |
878 | return -EIO; | |
bb1b0133 TW |
879 | |
880 | break; | |
881 | ||
882 | case HOST_ENUM_RES_CMD: | |
2bf94cab | 883 | dev_dbg(dev->dev, "hbm: enumeration response: message received\n"); |
544f9460 TW |
884 | |
885 | dev->init_clients_timer = 0; | |
886 | ||
bb1b0133 | 887 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
23f5a322 TW |
888 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
889 | < sizeof(enum_res->valid_addresses)); | |
890 | memcpy(dev->me_clients_map, enum_res->valid_addresses, | |
5ca2d388 | 891 | sizeof(enum_res->valid_addresses)); |
544f9460 TW |
892 | |
893 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || | |
894 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { | |
2bf94cab | 895 | dev_err(dev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", |
544f9460 TW |
896 | dev->dev_state, dev->hbm_state); |
897 | return -EPROTO; | |
bb1b0133 | 898 | } |
544f9460 | 899 | |
544f9460 TW |
900 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
901 | ||
902 | /* first property request */ | |
903 | if (mei_hbm_prop_req(dev)) | |
904 | return -EIO; | |
905 | ||
bb1b0133 TW |
906 | break; |
907 | ||
908 | case HOST_STOP_RES_CMD: | |
2bf94cab | 909 | dev_dbg(dev->dev, "hbm: stop response: message received\n"); |
544f9460 TW |
910 | |
911 | dev->init_clients_timer = 0; | |
912 | ||
913 | if (dev->hbm_state != MEI_HBM_STOPPED) { | |
2bf94cab | 914 | dev_err(dev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", |
544f9460 TW |
915 | dev->dev_state, dev->hbm_state); |
916 | return -EPROTO; | |
917 | } | |
9b0d5efc | 918 | |
33ec0826 | 919 | dev->dev_state = MEI_DEV_POWER_DOWN; |
2bf94cab | 920 | dev_info(dev->dev, "hbm: stop response: resetting.\n"); |
544f9460 TW |
921 | /* force the reset */ |
922 | return -EPROTO; | |
bb1b0133 TW |
923 | break; |
924 | ||
925 | case CLIENT_DISCONNECT_REQ_CMD: | |
2bf94cab | 926 | dev_dbg(dev->dev, "hbm: disconnect request: message received\n"); |
544f9460 | 927 | |
bb1b0133 | 928 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
8120e720 | 929 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
bb1b0133 TW |
930 | break; |
931 | ||
932 | case ME_STOP_REQ_CMD: | |
2bf94cab | 933 | dev_dbg(dev->dev, "hbm: stop request: message received\n"); |
544f9460 | 934 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 935 | if (mei_hbm_stop_req(dev)) { |
2bf94cab | 936 | dev_err(dev->dev, "hbm: stop request: failed to send stop request\n"); |
6bb948c9 TW |
937 | return -EIO; |
938 | } | |
bb1b0133 | 939 | break; |
bb1b0133 TW |
940 | default: |
941 | BUG(); | |
942 | break; | |
943 | ||
944 | } | |
544f9460 | 945 | return 0; |
bb1b0133 TW |
946 | } |
947 |