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; | |
1df629ef | 153 | cmd->host_addr = mei_cl_host_addr(cl); |
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 | { |
1df629ef | 191 | return mei_cl_host_addr(cl) == 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 | 301 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
70ef835c | 302 | enum_req->allow_add = dev->hbm_f_dc_supported; |
bb1b0133 | 303 | |
544f9460 TW |
304 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
305 | if (ret) { | |
2bf94cab | 306 | dev_err(dev->dev, "enumeration request write failed: ret = %d.\n", |
544f9460 TW |
307 | ret); |
308 | return ret; | |
bb1b0133 | 309 | } |
9b0d5efc | 310 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
bb1b0133 | 311 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
544f9460 | 312 | return 0; |
bb1b0133 TW |
313 | } |
314 | ||
5ca2d388 TW |
315 | /* |
316 | * mei_hbm_me_cl_add - add new me client to the list | |
317 | * | |
318 | * @dev: the device structure | |
319 | * @res: hbm property response | |
320 | * | |
a8605ea2 | 321 | * Return: 0 on success and -ENOMEM on allocation failure |
5ca2d388 TW |
322 | */ |
323 | ||
324 | static int mei_hbm_me_cl_add(struct mei_device *dev, | |
325 | struct hbm_props_response *res) | |
326 | { | |
327 | struct mei_me_client *me_cl; | |
79563db9 TW |
328 | const uuid_le *uuid = &res->client_properties.protocol_name; |
329 | ||
330 | mei_me_cl_rm_by_uuid(dev, uuid); | |
5ca2d388 TW |
331 | |
332 | me_cl = kzalloc(sizeof(struct mei_me_client), GFP_KERNEL); | |
333 | if (!me_cl) | |
334 | return -ENOMEM; | |
335 | ||
79563db9 TW |
336 | mei_me_cl_init(me_cl); |
337 | ||
5ca2d388 TW |
338 | me_cl->props = res->client_properties; |
339 | me_cl->client_id = res->me_addr; | |
340 | me_cl->mei_flow_ctrl_creds = 0; | |
341 | ||
b7d88514 TW |
342 | mei_me_cl_add(dev, me_cl); |
343 | ||
5ca2d388 TW |
344 | return 0; |
345 | } | |
346 | ||
70ef835c TW |
347 | /** |
348 | * mei_hbm_add_cl_resp - send response to fw on client add request | |
349 | * | |
350 | * @dev: the device structure | |
351 | * @addr: me address | |
352 | * @status: response status | |
353 | * | |
354 | * Return: 0 on success and < 0 on failure | |
355 | */ | |
356 | static int mei_hbm_add_cl_resp(struct mei_device *dev, u8 addr, u8 status) | |
357 | { | |
358 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
359 | struct hbm_add_client_response *resp; | |
360 | const size_t len = sizeof(struct hbm_add_client_response); | |
361 | int ret; | |
362 | ||
363 | dev_dbg(dev->dev, "adding client response\n"); | |
364 | ||
365 | resp = (struct hbm_add_client_response *)dev->wr_msg.data; | |
366 | ||
367 | mei_hbm_hdr(mei_hdr, len); | |
368 | memset(resp, 0, sizeof(struct hbm_add_client_response)); | |
369 | ||
370 | resp->hbm_cmd = MEI_HBM_ADD_CLIENT_RES_CMD; | |
371 | resp->me_addr = addr; | |
372 | resp->status = status; | |
373 | ||
374 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
375 | if (ret) | |
376 | dev_err(dev->dev, "add client response write failed: ret = %d\n", | |
377 | ret); | |
378 | return ret; | |
379 | } | |
380 | ||
381 | /** | |
382 | * mei_hbm_fw_add_cl_req - request from the fw to add a client | |
383 | * | |
384 | * @dev: the device structure | |
385 | * @req: add client request | |
386 | * | |
387 | * Return: 0 on success and < 0 on failure | |
388 | */ | |
389 | static int mei_hbm_fw_add_cl_req(struct mei_device *dev, | |
390 | struct hbm_add_client_request *req) | |
391 | { | |
392 | int ret; | |
393 | u8 status = MEI_HBMS_SUCCESS; | |
394 | ||
395 | BUILD_BUG_ON(sizeof(struct hbm_add_client_request) != | |
396 | sizeof(struct hbm_props_response)); | |
397 | ||
398 | ret = mei_hbm_me_cl_add(dev, (struct hbm_props_response *)req); | |
399 | if (ret) | |
400 | status = !MEI_HBMS_SUCCESS; | |
401 | ||
402 | return mei_hbm_add_cl_resp(dev, req->me_addr, status); | |
403 | } | |
404 | ||
965ae37a TW |
405 | /** |
406 | * mei_hbm_cl_notify_req - send notification request | |
407 | * | |
408 | * @dev: the device structure | |
409 | * @cl: a client to disconnect from | |
410 | * @start: true for start false for stop | |
411 | * | |
412 | * Return: 0 on success and -EIO on write failure | |
413 | */ | |
414 | int mei_hbm_cl_notify_req(struct mei_device *dev, | |
415 | struct mei_cl *cl, u8 start) | |
416 | { | |
417 | ||
418 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
419 | struct hbm_notification_request *req; | |
420 | const size_t len = sizeof(struct hbm_notification_request); | |
421 | int ret; | |
422 | ||
423 | mei_hbm_hdr(mei_hdr, len); | |
424 | mei_hbm_cl_hdr(cl, MEI_HBM_NOTIFY_REQ_CMD, dev->wr_msg.data, len); | |
425 | ||
426 | req = (struct hbm_notification_request *)dev->wr_msg.data; | |
427 | req->start = start; | |
428 | ||
429 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
430 | if (ret) | |
431 | dev_err(dev->dev, "notify request failed: ret = %d\n", ret); | |
432 | ||
433 | return ret; | |
434 | } | |
435 | ||
436 | /** | |
437 | * notify_res_to_fop - convert notification response to the proper | |
438 | * notification FOP | |
439 | * | |
440 | * @cmd: client notification start response command | |
441 | * | |
442 | * Return: MEI_FOP_NOTIFY_START or MEI_FOP_NOTIFY_STOP; | |
443 | */ | |
444 | static inline enum mei_cb_file_ops notify_res_to_fop(struct mei_hbm_cl_cmd *cmd) | |
445 | { | |
446 | struct hbm_notification_response *rs = | |
447 | (struct hbm_notification_response *)cmd; | |
448 | ||
51678ccb | 449 | return mei_cl_notify_req2fop(rs->start); |
965ae37a TW |
450 | } |
451 | ||
452 | /** | |
453 | * mei_hbm_cl_notify_start_res - update the client state according | |
454 | * notify start response | |
455 | * | |
456 | * @dev: the device structure | |
457 | * @cl: mei host client | |
458 | * @cmd: client notification start response command | |
459 | */ | |
460 | static void mei_hbm_cl_notify_start_res(struct mei_device *dev, | |
461 | struct mei_cl *cl, | |
462 | struct mei_hbm_cl_cmd *cmd) | |
463 | { | |
464 | struct hbm_notification_response *rs = | |
465 | (struct hbm_notification_response *)cmd; | |
466 | ||
467 | cl_dbg(dev, cl, "hbm: notify start response status=%d\n", rs->status); | |
468 | ||
469 | if (rs->status == MEI_HBMS_SUCCESS || | |
470 | rs->status == MEI_HBMS_ALREADY_STARTED) { | |
471 | cl->notify_en = true; | |
472 | cl->status = 0; | |
473 | } else { | |
474 | cl->status = -EINVAL; | |
475 | } | |
476 | } | |
477 | ||
478 | /** | |
479 | * mei_hbm_cl_notify_stop_res - update the client state according | |
480 | * notify stop response | |
481 | * | |
482 | * @dev: the device structure | |
483 | * @cl: mei host client | |
484 | * @cmd: client notification stop response command | |
485 | */ | |
486 | static void mei_hbm_cl_notify_stop_res(struct mei_device *dev, | |
487 | struct mei_cl *cl, | |
488 | struct mei_hbm_cl_cmd *cmd) | |
489 | { | |
490 | struct hbm_notification_response *rs = | |
491 | (struct hbm_notification_response *)cmd; | |
492 | ||
493 | cl_dbg(dev, cl, "hbm: notify stop response status=%d\n", rs->status); | |
494 | ||
495 | if (rs->status == MEI_HBMS_SUCCESS || | |
496 | rs->status == MEI_HBMS_NOT_STARTED) { | |
497 | cl->notify_en = false; | |
498 | cl->status = 0; | |
499 | } else { | |
500 | /* TODO: spec is not clear yet about other possible issues */ | |
501 | cl->status = -EINVAL; | |
502 | } | |
503 | } | |
504 | ||
505 | /** | |
506 | * mei_hbm_cl_notify - signal notification event | |
507 | * | |
508 | * @dev: the device structure | |
509 | * @cmd: notification client message | |
510 | */ | |
511 | static void mei_hbm_cl_notify(struct mei_device *dev, | |
512 | struct mei_hbm_cl_cmd *cmd) | |
513 | { | |
514 | struct mei_cl *cl; | |
515 | ||
516 | cl = mei_hbm_cl_find_by_cmd(dev, cmd); | |
237092bf TW |
517 | if (cl) |
518 | mei_cl_notify(cl); | |
965ae37a TW |
519 | } |
520 | ||
8120e720 | 521 | /** |
393b148f | 522 | * mei_hbm_prop_req - request property for a single client |
8120e720 TW |
523 | * |
524 | * @dev: the device structure | |
525 | * | |
a8605ea2 | 526 | * Return: 0 on success and < 0 on failure |
8120e720 | 527 | */ |
bb1b0133 | 528 | |
8120e720 | 529 | static int mei_hbm_prop_req(struct mei_device *dev) |
bb1b0133 TW |
530 | { |
531 | ||
e46f1874 | 532 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
533 | struct hbm_props_request *prop_req; |
534 | const size_t len = sizeof(struct hbm_props_request); | |
535 | unsigned long next_client_index; | |
544f9460 | 536 | int ret; |
bb1b0133 | 537 | |
bb1b0133 TW |
538 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
539 | dev->me_client_index); | |
540 | ||
541 | /* We got all client properties */ | |
542 | if (next_client_index == MEI_CLIENTS_MAX) { | |
9b0d5efc | 543 | dev->hbm_state = MEI_HBM_STARTED; |
bb1b0133 TW |
544 | schedule_work(&dev->init_work); |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
e46f1874 TW |
549 | mei_hbm_hdr(mei_hdr, len); |
550 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; | |
bb1b0133 TW |
551 | |
552 | memset(prop_req, 0, sizeof(struct hbm_props_request)); | |
553 | ||
bb1b0133 | 554 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
3438c1f3 | 555 | prop_req->me_addr = next_client_index; |
bb1b0133 | 556 | |
544f9460 TW |
557 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
558 | if (ret) { | |
2bf94cab | 559 | dev_err(dev->dev, "properties request write failed: ret = %d\n", |
544f9460 TW |
560 | ret); |
561 | return ret; | |
bb1b0133 TW |
562 | } |
563 | ||
564 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; | |
565 | dev->me_client_index = next_client_index; | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
4fcbc99b TW |
570 | /* |
571 | * mei_hbm_pg - sends pg command | |
572 | * | |
573 | * @dev: the device structure | |
574 | * @pg_cmd: the pg command code | |
575 | * | |
a8605ea2 | 576 | * Return: -EIO on write failure |
bae1cc7d | 577 | * -EOPNOTSUPP if the operation is not supported by the protocol |
4fcbc99b TW |
578 | */ |
579 | int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) | |
580 | { | |
581 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
582 | struct hbm_power_gate *req; | |
583 | const size_t len = sizeof(struct hbm_power_gate); | |
584 | int ret; | |
585 | ||
bae1cc7d TW |
586 | if (!dev->hbm_f_pg_supported) |
587 | return -EOPNOTSUPP; | |
588 | ||
4fcbc99b TW |
589 | mei_hbm_hdr(mei_hdr, len); |
590 | ||
591 | req = (struct hbm_power_gate *)dev->wr_msg.data; | |
592 | memset(req, 0, len); | |
593 | req->hbm_cmd = pg_cmd; | |
594 | ||
595 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
596 | if (ret) | |
2bf94cab | 597 | dev_err(dev->dev, "power gate command write failed.\n"); |
4fcbc99b TW |
598 | return ret; |
599 | } | |
600 | EXPORT_SYMBOL_GPL(mei_hbm_pg); | |
601 | ||
e46f1874 | 602 | /** |
6bb948c9 | 603 | * mei_hbm_stop_req - send stop request message |
e46f1874 | 604 | * |
a8605ea2 | 605 | * @dev: mei device |
6bb948c9 | 606 | * |
a8605ea2 | 607 | * Return: -EIO on write failure |
e46f1874 | 608 | */ |
6bb948c9 | 609 | static int mei_hbm_stop_req(struct mei_device *dev) |
e46f1874 | 610 | { |
6bb948c9 | 611 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
e46f1874 | 612 | struct hbm_host_stop_request *req = |
6bb948c9 | 613 | (struct hbm_host_stop_request *)dev->wr_msg.data; |
e46f1874 TW |
614 | const size_t len = sizeof(struct hbm_host_stop_request); |
615 | ||
616 | mei_hbm_hdr(mei_hdr, len); | |
617 | ||
618 | memset(req, 0, len); | |
619 | req->hbm_cmd = HOST_STOP_REQ_CMD; | |
620 | req->reason = DRIVER_STOP_REQUEST; | |
6bb948c9 TW |
621 | |
622 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
e46f1874 TW |
623 | } |
624 | ||
bb1b0133 | 625 | /** |
83ce0741 | 626 | * mei_hbm_cl_flow_control_req - sends flow control request. |
bb1b0133 TW |
627 | * |
628 | * @dev: the device structure | |
8120e720 | 629 | * @cl: client info |
bb1b0133 | 630 | * |
a8605ea2 | 631 | * Return: -EIO on write failure |
bb1b0133 | 632 | */ |
8120e720 | 633 | int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 634 | { |
bb1b0133 | 635 | const size_t len = sizeof(struct hbm_flow_control); |
92db1555 | 636 | |
46922186 | 637 | cl_dbg(dev, cl, "sending flow control\n"); |
68d1aa65 | 638 | return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, len); |
bb1b0133 TW |
639 | } |
640 | ||
6bbda15f | 641 | /** |
393b148f | 642 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
6bbda15f | 643 | * |
393b148f | 644 | * @dev: the device structure |
6bbda15f | 645 | * @flow: flow control. |
12d00665 | 646 | * |
a8605ea2 | 647 | * Return: 0 on success, < 0 otherwise |
6bbda15f | 648 | */ |
12d00665 | 649 | static int mei_hbm_add_single_flow_creds(struct mei_device *dev, |
6bbda15f TW |
650 | struct hbm_flow_control *flow) |
651 | { | |
12d00665 | 652 | struct mei_me_client *me_cl; |
79563db9 | 653 | int rets; |
12d00665 | 654 | |
d320832f TW |
655 | me_cl = mei_me_cl_by_id(dev, flow->me_addr); |
656 | if (!me_cl) { | |
2bf94cab | 657 | dev_err(dev->dev, "no such me client %d\n", |
12d00665 | 658 | flow->me_addr); |
d320832f | 659 | return -ENOENT; |
12d00665 AU |
660 | } |
661 | ||
79563db9 TW |
662 | if (WARN_ON(me_cl->props.single_recv_buf == 0)) { |
663 | rets = -EINVAL; | |
664 | goto out; | |
665 | } | |
d320832f TW |
666 | |
667 | me_cl->mei_flow_ctrl_creds++; | |
2bf94cab | 668 | dev_dbg(dev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n", |
d320832f | 669 | flow->me_addr, me_cl->mei_flow_ctrl_creds); |
12d00665 | 670 | |
79563db9 TW |
671 | rets = 0; |
672 | out: | |
673 | mei_me_cl_put(me_cl); | |
674 | return rets; | |
6bbda15f TW |
675 | } |
676 | ||
677 | /** | |
678 | * mei_hbm_cl_flow_control_res - flow control response from me | |
679 | * | |
680 | * @dev: the device structure | |
681 | * @flow_control: flow control response bus message | |
682 | */ | |
683 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, | |
2af89db1 | 684 | struct hbm_flow_control *flow_control) |
6bbda15f | 685 | { |
31f88f57 | 686 | struct mei_cl *cl; |
6bbda15f TW |
687 | |
688 | if (!flow_control->host_addr) { | |
689 | /* single receive buffer */ | |
690 | mei_hbm_add_single_flow_creds(dev, flow_control); | |
691 | return; | |
692 | } | |
693 | ||
2af89db1 TW |
694 | cl = mei_hbm_cl_find_by_cmd(dev, flow_control); |
695 | if (cl) { | |
696 | cl->mei_flow_ctrl_creds++; | |
697 | cl_dbg(dev, cl, "flow control creds = %d.\n", | |
5ca2d388 | 698 | cl->mei_flow_ctrl_creds); |
6bbda15f TW |
699 | } |
700 | } | |
701 | ||
702 | ||
bb1b0133 | 703 | /** |
8120e720 | 704 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
bb1b0133 TW |
705 | * |
706 | * @dev: the device structure | |
8120e720 | 707 | * @cl: a client to disconnect from |
bb1b0133 | 708 | * |
a8605ea2 | 709 | * Return: -EIO on write failure |
bb1b0133 | 710 | */ |
8120e720 | 711 | int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 712 | { |
bb1b0133 | 713 | const size_t len = sizeof(struct hbm_client_connect_request); |
92db1555 | 714 | |
68d1aa65 | 715 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, len); |
bb1b0133 TW |
716 | } |
717 | ||
6bb948c9 TW |
718 | /** |
719 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW | |
720 | * | |
721 | * @dev: the device structure | |
722 | * @cl: a client to disconnect from | |
723 | * | |
a8605ea2 | 724 | * Return: -EIO on write failure |
6bb948c9 TW |
725 | */ |
726 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) | |
727 | { | |
6bb948c9 | 728 | const size_t len = sizeof(struct hbm_client_connect_response); |
92db1555 | 729 | |
68d1aa65 | 730 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, len); |
6bb948c9 TW |
731 | } |
732 | ||
6bbda15f | 733 | /** |
12f45ed4 TW |
734 | * mei_hbm_cl_disconnect_res - update the client state according |
735 | * disconnect response | |
6bbda15f | 736 | * |
d512c209 | 737 | * @dev: the device structure |
12f45ed4 TW |
738 | * @cl: mei host client |
739 | * @cmd: disconnect client response host bus message | |
6bbda15f | 740 | */ |
d512c209 | 741 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct mei_cl *cl, |
12f45ed4 | 742 | struct mei_hbm_cl_cmd *cmd) |
6bbda15f | 743 | { |
12f45ed4 TW |
744 | struct hbm_client_connect_response *rs = |
745 | (struct hbm_client_connect_response *)cmd; | |
6bbda15f | 746 | |
d512c209 | 747 | cl_dbg(dev, cl, "hbm: disconnect response status=%d\n", rs->status); |
6bbda15f | 748 | |
12f45ed4 | 749 | if (rs->status == MEI_CL_DISCONN_SUCCESS) |
3c666182 | 750 | cl->state = MEI_FILE_DISCONNECT_REPLY; |
12f45ed4 | 751 | cl->status = 0; |
6bbda15f TW |
752 | } |
753 | ||
bb1b0133 | 754 | /** |
8120e720 | 755 | * mei_hbm_cl_connect_req - send connection request to specific me client |
bb1b0133 TW |
756 | * |
757 | * @dev: the device structure | |
8120e720 | 758 | * @cl: a client to connect to |
bb1b0133 | 759 | * |
a8605ea2 | 760 | * Return: -EIO on write failure |
bb1b0133 | 761 | */ |
8120e720 | 762 | int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 763 | { |
bb1b0133 | 764 | const size_t len = sizeof(struct hbm_client_connect_request); |
92db1555 | 765 | |
68d1aa65 | 766 | return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, len); |
bb1b0133 TW |
767 | } |
768 | ||
6bbda15f | 769 | /** |
12f45ed4 TW |
770 | * mei_hbm_cl_connect_res - update the client state according |
771 | * connection response | |
6bbda15f | 772 | * |
d512c209 | 773 | * @dev: the device structure |
12f45ed4 TW |
774 | * @cl: mei host client |
775 | * @cmd: connect client response host bus message | |
6bbda15f | 776 | */ |
d512c209 | 777 | static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl, |
12f45ed4 | 778 | struct mei_hbm_cl_cmd *cmd) |
6bbda15f | 779 | { |
12f45ed4 TW |
780 | struct hbm_client_connect_response *rs = |
781 | (struct hbm_client_connect_response *)cmd; | |
6bbda15f | 782 | |
d512c209 | 783 | cl_dbg(dev, cl, "hbm: connect response status=%s\n", |
285e2996 | 784 | mei_cl_conn_status_str(rs->status)); |
6bbda15f | 785 | |
12f45ed4 TW |
786 | if (rs->status == MEI_CL_CONN_SUCCESS) |
787 | cl->state = MEI_FILE_CONNECTED; | |
70ef835c | 788 | else { |
3c666182 | 789 | cl->state = MEI_FILE_DISCONNECT_REPLY; |
70ef835c TW |
790 | if (rs->status == MEI_CL_CONN_NOT_FOUND) |
791 | mei_me_cl_del(dev, cl->me_cl); | |
792 | } | |
12f45ed4 TW |
793 | cl->status = mei_cl_conn_status_to_errno(rs->status); |
794 | } | |
795 | ||
796 | /** | |
797 | * mei_hbm_cl_res - process hbm response received on behalf | |
798 | * an client | |
799 | * | |
800 | * @dev: the device structure | |
801 | * @rs: hbm client message | |
802 | * @fop_type: file operation type | |
803 | */ | |
804 | static void mei_hbm_cl_res(struct mei_device *dev, | |
805 | struct mei_hbm_cl_cmd *rs, | |
806 | enum mei_cb_file_ops fop_type) | |
807 | { | |
808 | struct mei_cl *cl; | |
809 | struct mei_cl_cb *cb, *next; | |
6bbda15f | 810 | |
12f45ed4 | 811 | cl = NULL; |
64092858 | 812 | list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { |
6bbda15f | 813 | |
64092858 | 814 | cl = cb->cl; |
6bbda15f | 815 | |
12f45ed4 | 816 | if (cb->fop_type != fop_type) |
64092858 | 817 | continue; |
6bbda15f | 818 | |
64092858 | 819 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
928fa666 | 820 | list_del_init(&cb->list); |
64092858 | 821 | break; |
6bbda15f TW |
822 | } |
823 | } | |
64092858 TW |
824 | |
825 | if (!cl) | |
826 | return; | |
827 | ||
12f45ed4 TW |
828 | switch (fop_type) { |
829 | case MEI_FOP_CONNECT: | |
d512c209 | 830 | mei_hbm_cl_connect_res(dev, cl, rs); |
12f45ed4 TW |
831 | break; |
832 | case MEI_FOP_DISCONNECT: | |
d512c209 | 833 | mei_hbm_cl_disconnect_res(dev, cl, rs); |
12f45ed4 | 834 | break; |
965ae37a TW |
835 | case MEI_FOP_NOTIFY_START: |
836 | mei_hbm_cl_notify_start_res(dev, cl, rs); | |
837 | break; | |
838 | case MEI_FOP_NOTIFY_STOP: | |
839 | mei_hbm_cl_notify_stop_res(dev, cl, rs); | |
840 | break; | |
12f45ed4 TW |
841 | default: |
842 | return; | |
843 | } | |
844 | ||
64092858 | 845 | cl->timer_count = 0; |
12f45ed4 | 846 | wake_up(&cl->wait); |
6bbda15f TW |
847 | } |
848 | ||
849 | ||
bb1b0133 | 850 | /** |
83ce0741 AU |
851 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
852 | * host sends disconnect response | |
bb1b0133 TW |
853 | * |
854 | * @dev: the device structure. | |
8120e720 | 855 | * @disconnect_req: disconnect request bus message from the me |
6bb948c9 | 856 | * |
a8605ea2 | 857 | * Return: -ENOMEM on allocation failure |
bb1b0133 | 858 | */ |
6bb948c9 | 859 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
bb1b0133 TW |
860 | struct hbm_client_connect_request *disconnect_req) |
861 | { | |
31f88f57 | 862 | struct mei_cl *cl; |
6bb948c9 | 863 | struct mei_cl_cb *cb; |
bb1b0133 | 864 | |
2af89db1 TW |
865 | cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req); |
866 | if (cl) { | |
3c666182 TW |
867 | cl_dbg(dev, cl, "fw disconnect request received\n"); |
868 | cl->state = MEI_FILE_DISCONNECTING; | |
2af89db1 TW |
869 | cl->timer_count = 0; |
870 | ||
bca67d68 | 871 | cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT_RSP, NULL); |
2af89db1 TW |
872 | if (!cb) |
873 | return -ENOMEM; | |
2af89db1 TW |
874 | cl_dbg(dev, cl, "add disconnect response as first\n"); |
875 | list_add(&cb->list, &dev->ctrl_wr_list.list); | |
bb1b0133 | 876 | } |
6bb948c9 | 877 | return 0; |
bb1b0133 TW |
878 | } |
879 | ||
bae1cc7d | 880 | /** |
a8605ea2 | 881 | * mei_hbm_config_features - check what hbm features and commands |
bae1cc7d TW |
882 | * are supported by the fw |
883 | * | |
884 | * @dev: the device structure | |
885 | */ | |
886 | static void mei_hbm_config_features(struct mei_device *dev) | |
887 | { | |
888 | /* Power Gating Isolation Support */ | |
889 | dev->hbm_f_pg_supported = 0; | |
890 | if (dev->version.major_version > HBM_MAJOR_VERSION_PGI) | |
891 | dev->hbm_f_pg_supported = 1; | |
892 | ||
893 | if (dev->version.major_version == HBM_MAJOR_VERSION_PGI && | |
894 | dev->version.minor_version >= HBM_MINOR_VERSION_PGI) | |
895 | dev->hbm_f_pg_supported = 1; | |
70ef835c TW |
896 | |
897 | if (dev->version.major_version >= HBM_MAJOR_VERSION_DC) | |
898 | dev->hbm_f_dc_supported = 1; | |
18901357 AU |
899 | |
900 | /* disconnect on connect timeout instead of link reset */ | |
901 | if (dev->version.major_version >= HBM_MAJOR_VERSION_DOT) | |
902 | dev->hbm_f_dot_supported = 1; | |
4d99877d TW |
903 | |
904 | /* Notification Event Support */ | |
905 | if (dev->version.major_version >= HBM_MAJOR_VERSION_EV) | |
906 | dev->hbm_f_ev_supported = 1; | |
bae1cc7d | 907 | } |
bb1b0133 | 908 | |
2c9b48ac TW |
909 | /** |
910 | * mei_hbm_version_is_supported - checks whether the driver can | |
911 | * support the hbm version of the device | |
912 | * | |
913 | * @dev: the device structure | |
a8605ea2 | 914 | * Return: true if driver can support hbm version of the device |
2c9b48ac TW |
915 | */ |
916 | bool mei_hbm_version_is_supported(struct mei_device *dev) | |
917 | { | |
918 | return (dev->version.major_version < HBM_MAJOR_VERSION) || | |
919 | (dev->version.major_version == HBM_MAJOR_VERSION && | |
920 | dev->version.minor_version <= HBM_MINOR_VERSION); | |
921 | } | |
922 | ||
bb1b0133 TW |
923 | /** |
924 | * mei_hbm_dispatch - bottom half read routine after ISR to | |
925 | * handle the read bus message cmd processing. | |
926 | * | |
927 | * @dev: the device structure | |
a8605ea2 | 928 | * @hdr: header of bus message |
544f9460 | 929 | * |
a8605ea2 | 930 | * Return: 0 on success and < 0 on failure |
bb1b0133 | 931 | */ |
544f9460 | 932 | int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) |
bb1b0133 TW |
933 | { |
934 | struct mei_bus_message *mei_msg; | |
bb1b0133 | 935 | struct hbm_host_version_response *version_res; |
bb1b0133 TW |
936 | struct hbm_props_response *props_res; |
937 | struct hbm_host_enum_response *enum_res; | |
70ef835c TW |
938 | struct hbm_add_client_request *add_cl_req; |
939 | int ret; | |
bb1b0133 | 940 | |
12f45ed4 TW |
941 | struct mei_hbm_cl_cmd *cl_cmd; |
942 | struct hbm_client_connect_request *disconnect_req; | |
943 | struct hbm_flow_control *flow_control; | |
944 | ||
bb1b0133 TW |
945 | /* read the message to our buffer */ |
946 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); | |
947 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); | |
948 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; | |
12f45ed4 | 949 | cl_cmd = (struct mei_hbm_cl_cmd *)mei_msg; |
bb1b0133 | 950 | |
66ae460b TW |
951 | /* ignore spurious message and prevent reset nesting |
952 | * hbm is put to idle during system reset | |
953 | */ | |
954 | if (dev->hbm_state == MEI_HBM_IDLE) { | |
2bf94cab | 955 | dev_dbg(dev->dev, "hbm: state is idle ignore spurious messages\n"); |
66ae460b TW |
956 | return 0; |
957 | } | |
958 | ||
bb1b0133 TW |
959 | switch (mei_msg->hbm_cmd) { |
960 | case HOST_START_RES_CMD: | |
2bf94cab | 961 | dev_dbg(dev->dev, "hbm: start: response message received.\n"); |
544f9460 TW |
962 | |
963 | dev->init_clients_timer = 0; | |
964 | ||
bb1b0133 | 965 | version_res = (struct hbm_host_version_response *)mei_msg; |
2c9b48ac | 966 | |
2bf94cab | 967 | dev_dbg(dev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", |
2c9b48ac TW |
968 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, |
969 | version_res->me_max_version.major_version, | |
970 | version_res->me_max_version.minor_version); | |
971 | ||
972 | if (version_res->host_version_supported) { | |
973 | dev->version.major_version = HBM_MAJOR_VERSION; | |
974 | dev->version.minor_version = HBM_MINOR_VERSION; | |
975 | } else { | |
976 | dev->version.major_version = | |
977 | version_res->me_max_version.major_version; | |
978 | dev->version.minor_version = | |
979 | version_res->me_max_version.minor_version; | |
980 | } | |
981 | ||
982 | if (!mei_hbm_version_is_supported(dev)) { | |
2bf94cab | 983 | dev_warn(dev->dev, "hbm: start: version mismatch - stopping the driver.\n"); |
bb1b0133 | 984 | |
544f9460 | 985 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 986 | if (mei_hbm_stop_req(dev)) { |
2bf94cab | 987 | dev_err(dev->dev, "hbm: start: failed to send stop request\n"); |
544f9460 TW |
988 | return -EIO; |
989 | } | |
990 | break; | |
991 | } | |
9b0d5efc | 992 | |
bae1cc7d TW |
993 | mei_hbm_config_features(dev); |
994 | ||
544f9460 | 995 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
cb02efc3 | 996 | dev->hbm_state != MEI_HBM_STARTING) { |
2bf94cab | 997 | dev_err(dev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
544f9460 TW |
998 | dev->dev_state, dev->hbm_state); |
999 | return -EPROTO; | |
e46f1874 | 1000 | } |
bb1b0133 | 1001 | |
544f9460 | 1002 | if (mei_hbm_enum_clients_req(dev)) { |
2bf94cab | 1003 | dev_err(dev->dev, "hbm: start: failed to send enumeration request\n"); |
544f9460 | 1004 | return -EIO; |
bb1b0133 TW |
1005 | } |
1006 | ||
cb02efc3 | 1007 | wake_up(&dev->wait_hbm_start); |
bb1b0133 TW |
1008 | break; |
1009 | ||
1010 | case CLIENT_CONNECT_RES_CMD: | |
2bf94cab | 1011 | dev_dbg(dev->dev, "hbm: client connect response: message received.\n"); |
12f45ed4 | 1012 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT); |
bb1b0133 TW |
1013 | break; |
1014 | ||
1015 | case CLIENT_DISCONNECT_RES_CMD: | |
2bf94cab | 1016 | dev_dbg(dev->dev, "hbm: client disconnect response: message received.\n"); |
12f45ed4 | 1017 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT); |
bb1b0133 TW |
1018 | break; |
1019 | ||
1020 | case MEI_FLOW_CONTROL_CMD: | |
2bf94cab | 1021 | dev_dbg(dev->dev, "hbm: client flow control response: message received.\n"); |
544f9460 | 1022 | |
bb1b0133 | 1023 | flow_control = (struct hbm_flow_control *) mei_msg; |
6bbda15f | 1024 | mei_hbm_cl_flow_control_res(dev, flow_control); |
bb1b0133 TW |
1025 | break; |
1026 | ||
4fcbc99b | 1027 | case MEI_PG_ISOLATION_ENTRY_RES_CMD: |
2bf94cab | 1028 | dev_dbg(dev->dev, "power gate isolation entry response received\n"); |
ba9cdd0e | 1029 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
4fcbc99b TW |
1030 | if (waitqueue_active(&dev->wait_pg)) |
1031 | wake_up(&dev->wait_pg); | |
1032 | break; | |
1033 | ||
1034 | case MEI_PG_ISOLATION_EXIT_REQ_CMD: | |
2bf94cab | 1035 | dev_dbg(dev->dev, "power gate isolation exit request received\n"); |
ba9cdd0e | 1036 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
4fcbc99b TW |
1037 | if (waitqueue_active(&dev->wait_pg)) |
1038 | wake_up(&dev->wait_pg); | |
180ea05b TW |
1039 | else |
1040 | /* | |
1041 | * If the driver is not waiting on this then | |
1042 | * this is HW initiated exit from PG. | |
1043 | * Start runtime pm resume sequence to exit from PG. | |
1044 | */ | |
2bf94cab | 1045 | pm_request_resume(dev->dev); |
4fcbc99b TW |
1046 | break; |
1047 | ||
bb1b0133 | 1048 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
2bf94cab | 1049 | dev_dbg(dev->dev, "hbm: properties response: message received.\n"); |
544f9460 TW |
1050 | |
1051 | dev->init_clients_timer = 0; | |
1052 | ||
5ca2d388 TW |
1053 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
1054 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { | |
2bf94cab | 1055 | dev_err(dev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
5ca2d388 | 1056 | dev->dev_state, dev->hbm_state); |
544f9460 TW |
1057 | return -EPROTO; |
1058 | } | |
1059 | ||
bb1b0133 | 1060 | props_res = (struct hbm_props_response *)mei_msg; |
bb1b0133 | 1061 | |
544f9460 | 1062 | if (props_res->status) { |
2bf94cab | 1063 | dev_err(dev->dev, "hbm: properties response: wrong status = %d %s\n", |
89778d6e TW |
1064 | props_res->status, |
1065 | mei_hbm_status_str(props_res->status)); | |
544f9460 | 1066 | return -EPROTO; |
bb1b0133 TW |
1067 | } |
1068 | ||
5ca2d388 | 1069 | mei_hbm_me_cl_add(dev, props_res); |
bb1b0133 | 1070 | |
bb1b0133 | 1071 | dev->me_client_index++; |
bb1b0133 | 1072 | |
8120e720 | 1073 | /* request property for the next client */ |
544f9460 TW |
1074 | if (mei_hbm_prop_req(dev)) |
1075 | return -EIO; | |
bb1b0133 TW |
1076 | |
1077 | break; | |
1078 | ||
1079 | case HOST_ENUM_RES_CMD: | |
2bf94cab | 1080 | dev_dbg(dev->dev, "hbm: enumeration response: message received\n"); |
544f9460 TW |
1081 | |
1082 | dev->init_clients_timer = 0; | |
1083 | ||
bb1b0133 | 1084 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
23f5a322 TW |
1085 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
1086 | < sizeof(enum_res->valid_addresses)); | |
1087 | memcpy(dev->me_clients_map, enum_res->valid_addresses, | |
5ca2d388 | 1088 | sizeof(enum_res->valid_addresses)); |
544f9460 TW |
1089 | |
1090 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || | |
1091 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { | |
2bf94cab | 1092 | dev_err(dev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", |
544f9460 TW |
1093 | dev->dev_state, dev->hbm_state); |
1094 | return -EPROTO; | |
bb1b0133 | 1095 | } |
544f9460 | 1096 | |
544f9460 TW |
1097 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
1098 | ||
1099 | /* first property request */ | |
1100 | if (mei_hbm_prop_req(dev)) | |
1101 | return -EIO; | |
1102 | ||
bb1b0133 TW |
1103 | break; |
1104 | ||
1105 | case HOST_STOP_RES_CMD: | |
2bf94cab | 1106 | dev_dbg(dev->dev, "hbm: stop response: message received\n"); |
544f9460 TW |
1107 | |
1108 | dev->init_clients_timer = 0; | |
1109 | ||
1110 | if (dev->hbm_state != MEI_HBM_STOPPED) { | |
2bf94cab | 1111 | dev_err(dev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", |
544f9460 TW |
1112 | dev->dev_state, dev->hbm_state); |
1113 | return -EPROTO; | |
1114 | } | |
9b0d5efc | 1115 | |
33ec0826 | 1116 | dev->dev_state = MEI_DEV_POWER_DOWN; |
2bf94cab | 1117 | dev_info(dev->dev, "hbm: stop response: resetting.\n"); |
544f9460 TW |
1118 | /* force the reset */ |
1119 | return -EPROTO; | |
bb1b0133 TW |
1120 | break; |
1121 | ||
1122 | case CLIENT_DISCONNECT_REQ_CMD: | |
2bf94cab | 1123 | dev_dbg(dev->dev, "hbm: disconnect request: message received\n"); |
544f9460 | 1124 | |
bb1b0133 | 1125 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
8120e720 | 1126 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
bb1b0133 TW |
1127 | break; |
1128 | ||
1129 | case ME_STOP_REQ_CMD: | |
2bf94cab | 1130 | dev_dbg(dev->dev, "hbm: stop request: message received\n"); |
544f9460 | 1131 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 1132 | if (mei_hbm_stop_req(dev)) { |
2bf94cab | 1133 | dev_err(dev->dev, "hbm: stop request: failed to send stop request\n"); |
6bb948c9 TW |
1134 | return -EIO; |
1135 | } | |
bb1b0133 | 1136 | break; |
70ef835c TW |
1137 | |
1138 | case MEI_HBM_ADD_CLIENT_REQ_CMD: | |
1139 | dev_dbg(dev->dev, "hbm: add client request received\n"); | |
1140 | /* | |
1141 | * after the host receives the enum_resp | |
1142 | * message clients may be added or removed | |
1143 | */ | |
1144 | if (dev->hbm_state <= MEI_HBM_ENUM_CLIENTS && | |
1145 | dev->hbm_state >= MEI_HBM_STOPPED) { | |
1146 | dev_err(dev->dev, "hbm: add client: state mismatch, [%d, %d]\n", | |
1147 | dev->dev_state, dev->hbm_state); | |
1148 | return -EPROTO; | |
1149 | } | |
1150 | add_cl_req = (struct hbm_add_client_request *)mei_msg; | |
1151 | ret = mei_hbm_fw_add_cl_req(dev, add_cl_req); | |
1152 | if (ret) { | |
1153 | dev_err(dev->dev, "hbm: add client: failed to send response %d\n", | |
1154 | ret); | |
1155 | return -EIO; | |
1156 | } | |
1157 | dev_dbg(dev->dev, "hbm: add client request processed\n"); | |
1158 | break; | |
1159 | ||
965ae37a TW |
1160 | case MEI_HBM_NOTIFY_RES_CMD: |
1161 | dev_dbg(dev->dev, "hbm: notify response received\n"); | |
1162 | mei_hbm_cl_res(dev, cl_cmd, notify_res_to_fop(cl_cmd)); | |
1163 | break; | |
1164 | ||
1165 | case MEI_HBM_NOTIFICATION_CMD: | |
1166 | dev_dbg(dev->dev, "hbm: notification\n"); | |
1167 | mei_hbm_cl_notify(dev, cl_cmd); | |
1168 | break; | |
1169 | ||
bb1b0133 TW |
1170 | default: |
1171 | BUG(); | |
1172 | break; | |
1173 | ||
1174 | } | |
544f9460 | 1175 | return 0; |
bb1b0133 TW |
1176 | } |
1177 |