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); | |
71e117f2 | 55 | MEI_CL_CS(NOT_ALLOWED); |
285e2996 AU |
56 | default: return "unknown"; |
57 | } | |
58 | #undef MEI_CL_CCS | |
59 | } | |
60 | ||
1beeb4b9 AU |
61 | const char *mei_hbm_state_str(enum mei_hbm_state state) |
62 | { | |
63 | #define MEI_HBM_STATE(state) case MEI_HBM_##state: return #state | |
64 | switch (state) { | |
65 | MEI_HBM_STATE(IDLE); | |
66 | MEI_HBM_STATE(STARTING); | |
67 | MEI_HBM_STATE(STARTED); | |
68 | MEI_HBM_STATE(ENUM_CLIENTS); | |
69 | MEI_HBM_STATE(CLIENT_PROPERTIES); | |
70 | MEI_HBM_STATE(STOPPED); | |
71 | default: | |
72 | return "unknown"; | |
73 | } | |
74 | #undef MEI_HBM_STATE | |
75 | } | |
76 | ||
285e2996 AU |
77 | /** |
78 | * mei_cl_conn_status_to_errno - convert client connect response | |
79 | * status to error code | |
80 | * | |
81 | * @status: client connect response status | |
82 | * | |
a8605ea2 | 83 | * Return: corresponding error code |
285e2996 AU |
84 | */ |
85 | static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status) | |
86 | { | |
87 | switch (status) { | |
88 | case MEI_CL_CONN_SUCCESS: return 0; | |
89 | case MEI_CL_CONN_NOT_FOUND: return -ENOTTY; | |
90 | case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY; | |
91 | case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY; | |
92 | case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL; | |
71e117f2 | 93 | case MEI_CL_CONN_NOT_ALLOWED: return -EBUSY; |
285e2996 AU |
94 | default: return -EINVAL; |
95 | } | |
96 | } | |
97 | ||
84b3294a TW |
98 | /** |
99 | * mei_hbm_idle - set hbm to idle state | |
100 | * | |
101 | * @dev: the device structure | |
102 | */ | |
103 | void mei_hbm_idle(struct mei_device *dev) | |
104 | { | |
105 | dev->init_clients_timer = 0; | |
106 | dev->hbm_state = MEI_HBM_IDLE; | |
107 | } | |
108 | ||
25ca6472 TW |
109 | /** |
110 | * mei_hbm_reset - reset hbm counters and book keeping data structurs | |
111 | * | |
112 | * @dev: the device structure | |
113 | */ | |
114 | void mei_hbm_reset(struct mei_device *dev) | |
115 | { | |
84b3294a TW |
116 | dev->me_client_index = 0; |
117 | ||
79563db9 | 118 | mei_me_cl_rm_all(dev); |
84b3294a TW |
119 | |
120 | mei_hbm_idle(dev); | |
121 | } | |
122 | ||
2190fe2a TW |
123 | /** |
124 | * mei_hbm_hdr - construct hbm header | |
125 | * | |
126 | * @hdr: hbm header | |
127 | * @length: payload length | |
128 | */ | |
129 | ||
130 | static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length) | |
131 | { | |
132 | hdr->host_addr = 0; | |
133 | hdr->me_addr = 0; | |
134 | hdr->length = length; | |
135 | hdr->msg_complete = 1; | |
136 | hdr->reserved = 0; | |
137 | } | |
138 | ||
cd51ed64 TW |
139 | /** |
140 | * mei_hbm_cl_hdr - construct client hbm header | |
393b148f | 141 | * |
68d1aa65 | 142 | * @cl: client |
cd51ed64 TW |
143 | * @hbm_cmd: host bus message command |
144 | * @buf: buffer for cl header | |
145 | * @len: buffer length | |
146 | */ | |
147 | static inline | |
148 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) | |
149 | { | |
150 | struct mei_hbm_cl_cmd *cmd = buf; | |
151 | ||
152 | memset(cmd, 0, len); | |
153 | ||
154 | cmd->hbm_cmd = hbm_cmd; | |
1df629ef | 155 | cmd->host_addr = mei_cl_host_addr(cl); |
d49ed64a | 156 | cmd->me_addr = mei_cl_me_id(cl); |
cd51ed64 TW |
157 | } |
158 | ||
68d1aa65 TW |
159 | /** |
160 | * mei_hbm_cl_write - write simple hbm client message | |
161 | * | |
162 | * @dev: the device structure | |
163 | * @cl: client | |
164 | * @hbm_cmd: host bus message command | |
165 | * @len: buffer length | |
ce23139c AU |
166 | * |
167 | * Return: 0 on success, <0 on failure. | |
68d1aa65 TW |
168 | */ |
169 | static inline | |
170 | int mei_hbm_cl_write(struct mei_device *dev, | |
171 | struct mei_cl *cl, u8 hbm_cmd, size_t len) | |
172 | { | |
173 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
174 | ||
175 | mei_hbm_hdr(mei_hdr, len); | |
176 | mei_hbm_cl_hdr(cl, hbm_cmd, dev->wr_msg.data, len); | |
177 | ||
178 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
179 | } | |
180 | ||
cd51ed64 | 181 | /** |
2af89db1 TW |
182 | * mei_hbm_cl_addr_equal - check if the client's and |
183 | * the message address match | |
cd51ed64 | 184 | * |
2af89db1 TW |
185 | * @cl: client |
186 | * @cmd: hbm client message | |
cd51ed64 | 187 | * |
a8605ea2 | 188 | * Return: true if addresses are the same |
cd51ed64 TW |
189 | */ |
190 | static inline | |
2af89db1 | 191 | bool mei_hbm_cl_addr_equal(struct mei_cl *cl, struct mei_hbm_cl_cmd *cmd) |
cd51ed64 | 192 | { |
1df629ef | 193 | return mei_cl_host_addr(cl) == cmd->host_addr && |
d49ed64a | 194 | mei_cl_me_id(cl) == cmd->me_addr; |
cd51ed64 TW |
195 | } |
196 | ||
2af89db1 TW |
197 | /** |
198 | * mei_hbm_cl_find_by_cmd - find recipient client | |
199 | * | |
200 | * @dev: the device structure | |
201 | * @buf: a buffer with hbm cl command | |
202 | * | |
a8605ea2 | 203 | * Return: the recipient client or NULL if not found |
2af89db1 TW |
204 | */ |
205 | static inline | |
206 | struct mei_cl *mei_hbm_cl_find_by_cmd(struct mei_device *dev, void *buf) | |
207 | { | |
208 | struct mei_hbm_cl_cmd *cmd = (struct mei_hbm_cl_cmd *)buf; | |
209 | struct mei_cl *cl; | |
210 | ||
211 | list_for_each_entry(cl, &dev->file_list, link) | |
212 | if (mei_hbm_cl_addr_equal(cl, cmd)) | |
213 | return cl; | |
214 | return NULL; | |
215 | } | |
216 | ||
217 | ||
cb02efc3 AU |
218 | /** |
219 | * mei_hbm_start_wait - wait for start response message. | |
220 | * | |
221 | * @dev: the device structure | |
222 | * | |
a8605ea2 | 223 | * Return: 0 on success and < 0 on failure |
cb02efc3 | 224 | */ |
9b0d5efc TW |
225 | int mei_hbm_start_wait(struct mei_device *dev) |
226 | { | |
227 | int ret; | |
cb02efc3 AU |
228 | |
229 | if (dev->hbm_state > MEI_HBM_STARTING) | |
9b0d5efc TW |
230 | return 0; |
231 | ||
232 | mutex_unlock(&dev->device_lock); | |
cb02efc3 AU |
233 | ret = wait_event_timeout(dev->wait_hbm_start, |
234 | dev->hbm_state != MEI_HBM_STARTING, | |
7d93e58d | 235 | mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); |
9b0d5efc TW |
236 | mutex_lock(&dev->device_lock); |
237 | ||
cb02efc3 | 238 | if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) { |
9b0d5efc | 239 | dev->hbm_state = MEI_HBM_IDLE; |
2bf94cab | 240 | dev_err(dev->dev, "waiting for mei start failed\n"); |
7ca96aa2 | 241 | return -ETIME; |
9b0d5efc TW |
242 | } |
243 | return 0; | |
244 | } | |
245 | ||
bb1b0133 | 246 | /** |
8120e720 | 247 | * mei_hbm_start_req - sends start request message. |
bb1b0133 TW |
248 | * |
249 | * @dev: the device structure | |
544f9460 | 250 | * |
a8605ea2 | 251 | * Return: 0 on success and < 0 on failure |
bb1b0133 | 252 | */ |
9b0d5efc | 253 | int mei_hbm_start_req(struct mei_device *dev) |
bb1b0133 | 254 | { |
e46f1874 | 255 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
256 | struct hbm_host_version_request *start_req; |
257 | const size_t len = sizeof(struct hbm_host_version_request); | |
544f9460 | 258 | int ret; |
bb1b0133 | 259 | |
5ca2d388 TW |
260 | mei_hbm_reset(dev); |
261 | ||
e46f1874 | 262 | mei_hbm_hdr(mei_hdr, len); |
bb1b0133 TW |
263 | |
264 | /* host start message */ | |
e46f1874 | 265 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
bb1b0133 TW |
266 | memset(start_req, 0, len); |
267 | start_req->hbm_cmd = HOST_START_REQ_CMD; | |
268 | start_req->host_version.major_version = HBM_MAJOR_VERSION; | |
269 | start_req->host_version.minor_version = HBM_MINOR_VERSION; | |
270 | ||
9b0d5efc | 271 | dev->hbm_state = MEI_HBM_IDLE; |
544f9460 TW |
272 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
273 | if (ret) { | |
2bf94cab | 274 | dev_err(dev->dev, "version message write failed: ret = %d\n", |
544f9460 TW |
275 | ret); |
276 | return ret; | |
bb1b0133 | 277 | } |
544f9460 | 278 | |
cb02efc3 | 279 | dev->hbm_state = MEI_HBM_STARTING; |
bb1b0133 | 280 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
9b0d5efc | 281 | return 0; |
bb1b0133 TW |
282 | } |
283 | ||
99c2658f | 284 | /** |
8120e720 | 285 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
bb1b0133 TW |
286 | * |
287 | * @dev: the device structure | |
288 | * | |
a8605ea2 | 289 | * Return: 0 on success and < 0 on failure |
bb1b0133 | 290 | */ |
544f9460 | 291 | static int mei_hbm_enum_clients_req(struct mei_device *dev) |
bb1b0133 | 292 | { |
e46f1874 | 293 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
294 | struct hbm_host_enum_request *enum_req; |
295 | const size_t len = sizeof(struct hbm_host_enum_request); | |
544f9460 TW |
296 | int ret; |
297 | ||
bb1b0133 | 298 | /* enumerate clients */ |
e46f1874 | 299 | mei_hbm_hdr(mei_hdr, len); |
bb1b0133 | 300 | |
e46f1874 TW |
301 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
302 | memset(enum_req, 0, len); | |
bb1b0133 | 303 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
70ef835c | 304 | enum_req->allow_add = dev->hbm_f_dc_supported; |
bb1b0133 | 305 | |
544f9460 TW |
306 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
307 | if (ret) { | |
2bf94cab | 308 | dev_err(dev->dev, "enumeration request write failed: ret = %d.\n", |
544f9460 TW |
309 | ret); |
310 | return ret; | |
bb1b0133 | 311 | } |
9b0d5efc | 312 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
bb1b0133 | 313 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
544f9460 | 314 | return 0; |
bb1b0133 TW |
315 | } |
316 | ||
99c2658f | 317 | /** |
5ca2d388 TW |
318 | * mei_hbm_me_cl_add - add new me client to the list |
319 | * | |
320 | * @dev: the device structure | |
321 | * @res: hbm property response | |
322 | * | |
a8605ea2 | 323 | * Return: 0 on success and -ENOMEM on allocation failure |
5ca2d388 TW |
324 | */ |
325 | ||
326 | static int mei_hbm_me_cl_add(struct mei_device *dev, | |
327 | struct hbm_props_response *res) | |
328 | { | |
329 | struct mei_me_client *me_cl; | |
79563db9 TW |
330 | const uuid_le *uuid = &res->client_properties.protocol_name; |
331 | ||
332 | mei_me_cl_rm_by_uuid(dev, uuid); | |
5ca2d388 TW |
333 | |
334 | me_cl = kzalloc(sizeof(struct mei_me_client), GFP_KERNEL); | |
335 | if (!me_cl) | |
336 | return -ENOMEM; | |
337 | ||
79563db9 TW |
338 | mei_me_cl_init(me_cl); |
339 | ||
5ca2d388 TW |
340 | me_cl->props = res->client_properties; |
341 | me_cl->client_id = res->me_addr; | |
342 | me_cl->mei_flow_ctrl_creds = 0; | |
343 | ||
b7d88514 TW |
344 | mei_me_cl_add(dev, me_cl); |
345 | ||
5ca2d388 TW |
346 | return 0; |
347 | } | |
348 | ||
70ef835c TW |
349 | /** |
350 | * mei_hbm_add_cl_resp - send response to fw on client add request | |
351 | * | |
352 | * @dev: the device structure | |
353 | * @addr: me address | |
354 | * @status: response status | |
355 | * | |
356 | * Return: 0 on success and < 0 on failure | |
357 | */ | |
358 | static int mei_hbm_add_cl_resp(struct mei_device *dev, u8 addr, u8 status) | |
359 | { | |
360 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
361 | struct hbm_add_client_response *resp; | |
362 | const size_t len = sizeof(struct hbm_add_client_response); | |
363 | int ret; | |
364 | ||
365 | dev_dbg(dev->dev, "adding client response\n"); | |
366 | ||
367 | resp = (struct hbm_add_client_response *)dev->wr_msg.data; | |
368 | ||
369 | mei_hbm_hdr(mei_hdr, len); | |
370 | memset(resp, 0, sizeof(struct hbm_add_client_response)); | |
371 | ||
372 | resp->hbm_cmd = MEI_HBM_ADD_CLIENT_RES_CMD; | |
373 | resp->me_addr = addr; | |
374 | resp->status = status; | |
375 | ||
376 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
377 | if (ret) | |
378 | dev_err(dev->dev, "add client response write failed: ret = %d\n", | |
379 | ret); | |
380 | return ret; | |
381 | } | |
382 | ||
383 | /** | |
384 | * mei_hbm_fw_add_cl_req - request from the fw to add a client | |
385 | * | |
386 | * @dev: the device structure | |
387 | * @req: add client request | |
388 | * | |
389 | * Return: 0 on success and < 0 on failure | |
390 | */ | |
391 | static int mei_hbm_fw_add_cl_req(struct mei_device *dev, | |
392 | struct hbm_add_client_request *req) | |
393 | { | |
394 | int ret; | |
395 | u8 status = MEI_HBMS_SUCCESS; | |
396 | ||
397 | BUILD_BUG_ON(sizeof(struct hbm_add_client_request) != | |
398 | sizeof(struct hbm_props_response)); | |
399 | ||
400 | ret = mei_hbm_me_cl_add(dev, (struct hbm_props_response *)req); | |
401 | if (ret) | |
402 | status = !MEI_HBMS_SUCCESS; | |
403 | ||
404 | return mei_hbm_add_cl_resp(dev, req->me_addr, status); | |
405 | } | |
406 | ||
965ae37a TW |
407 | /** |
408 | * mei_hbm_cl_notify_req - send notification request | |
409 | * | |
410 | * @dev: the device structure | |
411 | * @cl: a client to disconnect from | |
412 | * @start: true for start false for stop | |
413 | * | |
414 | * Return: 0 on success and -EIO on write failure | |
415 | */ | |
416 | int mei_hbm_cl_notify_req(struct mei_device *dev, | |
417 | struct mei_cl *cl, u8 start) | |
418 | { | |
419 | ||
420 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
421 | struct hbm_notification_request *req; | |
422 | const size_t len = sizeof(struct hbm_notification_request); | |
423 | int ret; | |
424 | ||
425 | mei_hbm_hdr(mei_hdr, len); | |
426 | mei_hbm_cl_hdr(cl, MEI_HBM_NOTIFY_REQ_CMD, dev->wr_msg.data, len); | |
427 | ||
428 | req = (struct hbm_notification_request *)dev->wr_msg.data; | |
429 | req->start = start; | |
430 | ||
431 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
432 | if (ret) | |
433 | dev_err(dev->dev, "notify request failed: ret = %d\n", ret); | |
434 | ||
435 | return ret; | |
436 | } | |
437 | ||
438 | /** | |
439 | * notify_res_to_fop - convert notification response to the proper | |
440 | * notification FOP | |
441 | * | |
442 | * @cmd: client notification start response command | |
443 | * | |
444 | * Return: MEI_FOP_NOTIFY_START or MEI_FOP_NOTIFY_STOP; | |
445 | */ | |
446 | static inline enum mei_cb_file_ops notify_res_to_fop(struct mei_hbm_cl_cmd *cmd) | |
447 | { | |
448 | struct hbm_notification_response *rs = | |
449 | (struct hbm_notification_response *)cmd; | |
450 | ||
51678ccb | 451 | return mei_cl_notify_req2fop(rs->start); |
965ae37a TW |
452 | } |
453 | ||
454 | /** | |
455 | * mei_hbm_cl_notify_start_res - update the client state according | |
456 | * notify start response | |
457 | * | |
458 | * @dev: the device structure | |
459 | * @cl: mei host client | |
460 | * @cmd: client notification start response command | |
461 | */ | |
462 | static void mei_hbm_cl_notify_start_res(struct mei_device *dev, | |
463 | struct mei_cl *cl, | |
464 | struct mei_hbm_cl_cmd *cmd) | |
465 | { | |
466 | struct hbm_notification_response *rs = | |
467 | (struct hbm_notification_response *)cmd; | |
468 | ||
469 | cl_dbg(dev, cl, "hbm: notify start response status=%d\n", rs->status); | |
470 | ||
471 | if (rs->status == MEI_HBMS_SUCCESS || | |
472 | rs->status == MEI_HBMS_ALREADY_STARTED) { | |
473 | cl->notify_en = true; | |
474 | cl->status = 0; | |
475 | } else { | |
476 | cl->status = -EINVAL; | |
477 | } | |
478 | } | |
479 | ||
480 | /** | |
481 | * mei_hbm_cl_notify_stop_res - update the client state according | |
482 | * notify stop response | |
483 | * | |
484 | * @dev: the device structure | |
485 | * @cl: mei host client | |
486 | * @cmd: client notification stop response command | |
487 | */ | |
488 | static void mei_hbm_cl_notify_stop_res(struct mei_device *dev, | |
489 | struct mei_cl *cl, | |
490 | struct mei_hbm_cl_cmd *cmd) | |
491 | { | |
492 | struct hbm_notification_response *rs = | |
493 | (struct hbm_notification_response *)cmd; | |
494 | ||
495 | cl_dbg(dev, cl, "hbm: notify stop response status=%d\n", rs->status); | |
496 | ||
497 | if (rs->status == MEI_HBMS_SUCCESS || | |
498 | rs->status == MEI_HBMS_NOT_STARTED) { | |
499 | cl->notify_en = false; | |
500 | cl->status = 0; | |
501 | } else { | |
502 | /* TODO: spec is not clear yet about other possible issues */ | |
503 | cl->status = -EINVAL; | |
504 | } | |
505 | } | |
506 | ||
507 | /** | |
508 | * mei_hbm_cl_notify - signal notification event | |
509 | * | |
510 | * @dev: the device structure | |
511 | * @cmd: notification client message | |
512 | */ | |
513 | static void mei_hbm_cl_notify(struct mei_device *dev, | |
514 | struct mei_hbm_cl_cmd *cmd) | |
515 | { | |
516 | struct mei_cl *cl; | |
517 | ||
518 | cl = mei_hbm_cl_find_by_cmd(dev, cmd); | |
237092bf TW |
519 | if (cl) |
520 | mei_cl_notify(cl); | |
965ae37a TW |
521 | } |
522 | ||
8120e720 | 523 | /** |
393b148f | 524 | * mei_hbm_prop_req - request property for a single client |
8120e720 TW |
525 | * |
526 | * @dev: the device structure | |
527 | * | |
a8605ea2 | 528 | * Return: 0 on success and < 0 on failure |
8120e720 | 529 | */ |
bb1b0133 | 530 | |
8120e720 | 531 | static int mei_hbm_prop_req(struct mei_device *dev) |
bb1b0133 TW |
532 | { |
533 | ||
e46f1874 | 534 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
535 | struct hbm_props_request *prop_req; |
536 | const size_t len = sizeof(struct hbm_props_request); | |
537 | unsigned long next_client_index; | |
544f9460 | 538 | int ret; |
bb1b0133 | 539 | |
bb1b0133 TW |
540 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
541 | dev->me_client_index); | |
542 | ||
543 | /* We got all client properties */ | |
544 | if (next_client_index == MEI_CLIENTS_MAX) { | |
9b0d5efc | 545 | dev->hbm_state = MEI_HBM_STARTED; |
bb1b0133 TW |
546 | schedule_work(&dev->init_work); |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
e46f1874 TW |
551 | mei_hbm_hdr(mei_hdr, len); |
552 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; | |
bb1b0133 TW |
553 | |
554 | memset(prop_req, 0, sizeof(struct hbm_props_request)); | |
555 | ||
bb1b0133 | 556 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
3438c1f3 | 557 | prop_req->me_addr = next_client_index; |
bb1b0133 | 558 | |
544f9460 TW |
559 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
560 | if (ret) { | |
2bf94cab | 561 | dev_err(dev->dev, "properties request write failed: ret = %d\n", |
544f9460 TW |
562 | ret); |
563 | return ret; | |
bb1b0133 TW |
564 | } |
565 | ||
566 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; | |
567 | dev->me_client_index = next_client_index; | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
99c2658f | 572 | /** |
4fcbc99b TW |
573 | * mei_hbm_pg - sends pg command |
574 | * | |
575 | * @dev: the device structure | |
576 | * @pg_cmd: the pg command code | |
577 | * | |
a8605ea2 | 578 | * Return: -EIO on write failure |
bae1cc7d | 579 | * -EOPNOTSUPP if the operation is not supported by the protocol |
4fcbc99b TW |
580 | */ |
581 | int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) | |
582 | { | |
583 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
584 | struct hbm_power_gate *req; | |
585 | const size_t len = sizeof(struct hbm_power_gate); | |
586 | int ret; | |
587 | ||
bae1cc7d TW |
588 | if (!dev->hbm_f_pg_supported) |
589 | return -EOPNOTSUPP; | |
590 | ||
4fcbc99b TW |
591 | mei_hbm_hdr(mei_hdr, len); |
592 | ||
593 | req = (struct hbm_power_gate *)dev->wr_msg.data; | |
594 | memset(req, 0, len); | |
595 | req->hbm_cmd = pg_cmd; | |
596 | ||
597 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
598 | if (ret) | |
2bf94cab | 599 | dev_err(dev->dev, "power gate command write failed.\n"); |
4fcbc99b TW |
600 | return ret; |
601 | } | |
602 | EXPORT_SYMBOL_GPL(mei_hbm_pg); | |
603 | ||
e46f1874 | 604 | /** |
6bb948c9 | 605 | * mei_hbm_stop_req - send stop request message |
e46f1874 | 606 | * |
a8605ea2 | 607 | * @dev: mei device |
6bb948c9 | 608 | * |
a8605ea2 | 609 | * Return: -EIO on write failure |
e46f1874 | 610 | */ |
6bb948c9 | 611 | static int mei_hbm_stop_req(struct mei_device *dev) |
e46f1874 | 612 | { |
6bb948c9 | 613 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
e46f1874 | 614 | struct hbm_host_stop_request *req = |
6bb948c9 | 615 | (struct hbm_host_stop_request *)dev->wr_msg.data; |
e46f1874 TW |
616 | const size_t len = sizeof(struct hbm_host_stop_request); |
617 | ||
618 | mei_hbm_hdr(mei_hdr, len); | |
619 | ||
620 | memset(req, 0, len); | |
621 | req->hbm_cmd = HOST_STOP_REQ_CMD; | |
622 | req->reason = DRIVER_STOP_REQUEST; | |
6bb948c9 TW |
623 | |
624 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
e46f1874 TW |
625 | } |
626 | ||
bb1b0133 | 627 | /** |
83ce0741 | 628 | * mei_hbm_cl_flow_control_req - sends flow control request. |
bb1b0133 TW |
629 | * |
630 | * @dev: the device structure | |
8120e720 | 631 | * @cl: client info |
bb1b0133 | 632 | * |
a8605ea2 | 633 | * Return: -EIO on write failure |
bb1b0133 | 634 | */ |
8120e720 | 635 | int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 636 | { |
bb1b0133 | 637 | const size_t len = sizeof(struct hbm_flow_control); |
92db1555 | 638 | |
46922186 | 639 | cl_dbg(dev, cl, "sending flow control\n"); |
68d1aa65 | 640 | return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, len); |
bb1b0133 TW |
641 | } |
642 | ||
6bbda15f | 643 | /** |
393b148f | 644 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
6bbda15f | 645 | * |
393b148f | 646 | * @dev: the device structure |
6bbda15f | 647 | * @flow: flow control. |
12d00665 | 648 | * |
a8605ea2 | 649 | * Return: 0 on success, < 0 otherwise |
6bbda15f | 650 | */ |
12d00665 | 651 | static int mei_hbm_add_single_flow_creds(struct mei_device *dev, |
6bbda15f TW |
652 | struct hbm_flow_control *flow) |
653 | { | |
12d00665 | 654 | struct mei_me_client *me_cl; |
79563db9 | 655 | int rets; |
12d00665 | 656 | |
d320832f TW |
657 | me_cl = mei_me_cl_by_id(dev, flow->me_addr); |
658 | if (!me_cl) { | |
2bf94cab | 659 | dev_err(dev->dev, "no such me client %d\n", |
12d00665 | 660 | flow->me_addr); |
d320832f | 661 | return -ENOENT; |
12d00665 AU |
662 | } |
663 | ||
79563db9 TW |
664 | if (WARN_ON(me_cl->props.single_recv_buf == 0)) { |
665 | rets = -EINVAL; | |
666 | goto out; | |
667 | } | |
d320832f TW |
668 | |
669 | me_cl->mei_flow_ctrl_creds++; | |
2bf94cab | 670 | dev_dbg(dev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n", |
d320832f | 671 | flow->me_addr, me_cl->mei_flow_ctrl_creds); |
12d00665 | 672 | |
79563db9 TW |
673 | rets = 0; |
674 | out: | |
675 | mei_me_cl_put(me_cl); | |
676 | return rets; | |
6bbda15f TW |
677 | } |
678 | ||
679 | /** | |
680 | * mei_hbm_cl_flow_control_res - flow control response from me | |
681 | * | |
682 | * @dev: the device structure | |
683 | * @flow_control: flow control response bus message | |
684 | */ | |
685 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, | |
2af89db1 | 686 | struct hbm_flow_control *flow_control) |
6bbda15f | 687 | { |
31f88f57 | 688 | struct mei_cl *cl; |
6bbda15f TW |
689 | |
690 | if (!flow_control->host_addr) { | |
691 | /* single receive buffer */ | |
692 | mei_hbm_add_single_flow_creds(dev, flow_control); | |
693 | return; | |
694 | } | |
695 | ||
2af89db1 TW |
696 | cl = mei_hbm_cl_find_by_cmd(dev, flow_control); |
697 | if (cl) { | |
698 | cl->mei_flow_ctrl_creds++; | |
699 | cl_dbg(dev, cl, "flow control creds = %d.\n", | |
5ca2d388 | 700 | cl->mei_flow_ctrl_creds); |
6bbda15f TW |
701 | } |
702 | } | |
703 | ||
704 | ||
bb1b0133 | 705 | /** |
8120e720 | 706 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
bb1b0133 TW |
707 | * |
708 | * @dev: the device structure | |
8120e720 | 709 | * @cl: a client to disconnect from |
bb1b0133 | 710 | * |
a8605ea2 | 711 | * Return: -EIO on write failure |
bb1b0133 | 712 | */ |
8120e720 | 713 | int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 714 | { |
bb1b0133 | 715 | const size_t len = sizeof(struct hbm_client_connect_request); |
92db1555 | 716 | |
68d1aa65 | 717 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, len); |
bb1b0133 TW |
718 | } |
719 | ||
6bb948c9 TW |
720 | /** |
721 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW | |
722 | * | |
723 | * @dev: the device structure | |
724 | * @cl: a client to disconnect from | |
725 | * | |
a8605ea2 | 726 | * Return: -EIO on write failure |
6bb948c9 TW |
727 | */ |
728 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) | |
729 | { | |
6bb948c9 | 730 | const size_t len = sizeof(struct hbm_client_connect_response); |
92db1555 | 731 | |
68d1aa65 | 732 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, len); |
6bb948c9 TW |
733 | } |
734 | ||
6bbda15f | 735 | /** |
12f45ed4 TW |
736 | * mei_hbm_cl_disconnect_res - update the client state according |
737 | * disconnect response | |
6bbda15f | 738 | * |
d512c209 | 739 | * @dev: the device structure |
12f45ed4 TW |
740 | * @cl: mei host client |
741 | * @cmd: disconnect client response host bus message | |
6bbda15f | 742 | */ |
d512c209 | 743 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct mei_cl *cl, |
12f45ed4 | 744 | struct mei_hbm_cl_cmd *cmd) |
6bbda15f | 745 | { |
12f45ed4 TW |
746 | struct hbm_client_connect_response *rs = |
747 | (struct hbm_client_connect_response *)cmd; | |
6bbda15f | 748 | |
d512c209 | 749 | cl_dbg(dev, cl, "hbm: disconnect response status=%d\n", rs->status); |
6bbda15f | 750 | |
12f45ed4 | 751 | if (rs->status == MEI_CL_DISCONN_SUCCESS) |
3c666182 | 752 | cl->state = MEI_FILE_DISCONNECT_REPLY; |
12f45ed4 | 753 | cl->status = 0; |
6bbda15f TW |
754 | } |
755 | ||
bb1b0133 | 756 | /** |
8120e720 | 757 | * mei_hbm_cl_connect_req - send connection request to specific me client |
bb1b0133 TW |
758 | * |
759 | * @dev: the device structure | |
8120e720 | 760 | * @cl: a client to connect to |
bb1b0133 | 761 | * |
a8605ea2 | 762 | * Return: -EIO on write failure |
bb1b0133 | 763 | */ |
8120e720 | 764 | int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 765 | { |
bb1b0133 | 766 | const size_t len = sizeof(struct hbm_client_connect_request); |
92db1555 | 767 | |
68d1aa65 | 768 | return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, len); |
bb1b0133 TW |
769 | } |
770 | ||
6bbda15f | 771 | /** |
12f45ed4 TW |
772 | * mei_hbm_cl_connect_res - update the client state according |
773 | * connection response | |
6bbda15f | 774 | * |
d512c209 | 775 | * @dev: the device structure |
12f45ed4 TW |
776 | * @cl: mei host client |
777 | * @cmd: connect client response host bus message | |
6bbda15f | 778 | */ |
d512c209 | 779 | static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl, |
12f45ed4 | 780 | struct mei_hbm_cl_cmd *cmd) |
6bbda15f | 781 | { |
12f45ed4 TW |
782 | struct hbm_client_connect_response *rs = |
783 | (struct hbm_client_connect_response *)cmd; | |
6bbda15f | 784 | |
d512c209 | 785 | cl_dbg(dev, cl, "hbm: connect response status=%s\n", |
285e2996 | 786 | mei_cl_conn_status_str(rs->status)); |
6bbda15f | 787 | |
12f45ed4 TW |
788 | if (rs->status == MEI_CL_CONN_SUCCESS) |
789 | cl->state = MEI_FILE_CONNECTED; | |
70ef835c | 790 | else { |
3c666182 | 791 | cl->state = MEI_FILE_DISCONNECT_REPLY; |
70ef835c TW |
792 | if (rs->status == MEI_CL_CONN_NOT_FOUND) |
793 | mei_me_cl_del(dev, cl->me_cl); | |
794 | } | |
12f45ed4 TW |
795 | cl->status = mei_cl_conn_status_to_errno(rs->status); |
796 | } | |
797 | ||
798 | /** | |
799 | * mei_hbm_cl_res - process hbm response received on behalf | |
800 | * an client | |
801 | * | |
802 | * @dev: the device structure | |
803 | * @rs: hbm client message | |
804 | * @fop_type: file operation type | |
805 | */ | |
806 | static void mei_hbm_cl_res(struct mei_device *dev, | |
807 | struct mei_hbm_cl_cmd *rs, | |
808 | enum mei_cb_file_ops fop_type) | |
809 | { | |
810 | struct mei_cl *cl; | |
811 | struct mei_cl_cb *cb, *next; | |
6bbda15f | 812 | |
12f45ed4 | 813 | cl = NULL; |
64092858 | 814 | list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { |
6bbda15f | 815 | |
64092858 | 816 | cl = cb->cl; |
6bbda15f | 817 | |
12f45ed4 | 818 | if (cb->fop_type != fop_type) |
64092858 | 819 | continue; |
6bbda15f | 820 | |
64092858 | 821 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
928fa666 | 822 | list_del_init(&cb->list); |
64092858 | 823 | break; |
6bbda15f TW |
824 | } |
825 | } | |
64092858 TW |
826 | |
827 | if (!cl) | |
828 | return; | |
829 | ||
12f45ed4 TW |
830 | switch (fop_type) { |
831 | case MEI_FOP_CONNECT: | |
d512c209 | 832 | mei_hbm_cl_connect_res(dev, cl, rs); |
12f45ed4 TW |
833 | break; |
834 | case MEI_FOP_DISCONNECT: | |
d512c209 | 835 | mei_hbm_cl_disconnect_res(dev, cl, rs); |
12f45ed4 | 836 | break; |
965ae37a TW |
837 | case MEI_FOP_NOTIFY_START: |
838 | mei_hbm_cl_notify_start_res(dev, cl, rs); | |
839 | break; | |
840 | case MEI_FOP_NOTIFY_STOP: | |
841 | mei_hbm_cl_notify_stop_res(dev, cl, rs); | |
842 | break; | |
12f45ed4 TW |
843 | default: |
844 | return; | |
845 | } | |
846 | ||
64092858 | 847 | cl->timer_count = 0; |
12f45ed4 | 848 | wake_up(&cl->wait); |
6bbda15f TW |
849 | } |
850 | ||
851 | ||
bb1b0133 | 852 | /** |
83ce0741 AU |
853 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
854 | * host sends disconnect response | |
bb1b0133 TW |
855 | * |
856 | * @dev: the device structure. | |
8120e720 | 857 | * @disconnect_req: disconnect request bus message from the me |
6bb948c9 | 858 | * |
a8605ea2 | 859 | * Return: -ENOMEM on allocation failure |
bb1b0133 | 860 | */ |
6bb948c9 | 861 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
bb1b0133 TW |
862 | struct hbm_client_connect_request *disconnect_req) |
863 | { | |
31f88f57 | 864 | struct mei_cl *cl; |
6bb948c9 | 865 | struct mei_cl_cb *cb; |
bb1b0133 | 866 | |
2af89db1 TW |
867 | cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req); |
868 | if (cl) { | |
3c666182 TW |
869 | cl_dbg(dev, cl, "fw disconnect request received\n"); |
870 | cl->state = MEI_FILE_DISCONNECTING; | |
2af89db1 TW |
871 | cl->timer_count = 0; |
872 | ||
bca67d68 | 873 | cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT_RSP, NULL); |
2af89db1 TW |
874 | if (!cb) |
875 | return -ENOMEM; | |
2af89db1 TW |
876 | cl_dbg(dev, cl, "add disconnect response as first\n"); |
877 | list_add(&cb->list, &dev->ctrl_wr_list.list); | |
bb1b0133 | 878 | } |
6bb948c9 | 879 | return 0; |
bb1b0133 TW |
880 | } |
881 | ||
63f75232 AU |
882 | /** |
883 | * mei_hbm_pg_enter_res - PG enter response received | |
884 | * | |
885 | * @dev: the device structure. | |
886 | * | |
887 | * Return: 0 on success, -EPROTO on state mismatch | |
888 | */ | |
889 | static int mei_hbm_pg_enter_res(struct mei_device *dev) | |
890 | { | |
891 | if (mei_pg_state(dev) != MEI_PG_OFF || | |
892 | dev->pg_event != MEI_PG_EVENT_WAIT) { | |
893 | dev_err(dev->dev, "hbm: pg entry response: state mismatch [%s, %d]\n", | |
894 | mei_pg_state_str(mei_pg_state(dev)), dev->pg_event); | |
895 | return -EPROTO; | |
896 | } | |
897 | ||
898 | dev->pg_event = MEI_PG_EVENT_RECEIVED; | |
899 | wake_up(&dev->wait_pg); | |
900 | ||
901 | return 0; | |
902 | } | |
903 | ||
859ef2ff AU |
904 | /** |
905 | * mei_hbm_pg_resume - process with PG resume | |
906 | * | |
907 | * @dev: the device structure. | |
908 | */ | |
909 | void mei_hbm_pg_resume(struct mei_device *dev) | |
910 | { | |
911 | pm_request_resume(dev->dev); | |
912 | } | |
913 | EXPORT_SYMBOL_GPL(mei_hbm_pg_resume); | |
914 | ||
63f75232 AU |
915 | /** |
916 | * mei_hbm_pg_exit_res - PG exit response received | |
917 | * | |
918 | * @dev: the device structure. | |
919 | * | |
920 | * Return: 0 on success, -EPROTO on state mismatch | |
921 | */ | |
922 | static int mei_hbm_pg_exit_res(struct mei_device *dev) | |
923 | { | |
924 | if (mei_pg_state(dev) != MEI_PG_ON || | |
925 | (dev->pg_event != MEI_PG_EVENT_WAIT && | |
926 | dev->pg_event != MEI_PG_EVENT_IDLE)) { | |
927 | dev_err(dev->dev, "hbm: pg exit response: state mismatch [%s, %d]\n", | |
928 | mei_pg_state_str(mei_pg_state(dev)), dev->pg_event); | |
929 | return -EPROTO; | |
930 | } | |
931 | ||
932 | switch (dev->pg_event) { | |
933 | case MEI_PG_EVENT_WAIT: | |
934 | dev->pg_event = MEI_PG_EVENT_RECEIVED; | |
935 | wake_up(&dev->wait_pg); | |
936 | break; | |
937 | case MEI_PG_EVENT_IDLE: | |
938 | /* | |
939 | * If the driver is not waiting on this then | |
940 | * this is HW initiated exit from PG. | |
941 | * Start runtime pm resume sequence to exit from PG. | |
942 | */ | |
943 | dev->pg_event = MEI_PG_EVENT_RECEIVED; | |
859ef2ff | 944 | mei_hbm_pg_resume(dev); |
63f75232 AU |
945 | break; |
946 | default: | |
947 | WARN(1, "hbm: pg exit response: unexpected pg event = %d\n", | |
948 | dev->pg_event); | |
949 | return -EPROTO; | |
950 | } | |
951 | ||
952 | return 0; | |
953 | } | |
954 | ||
bae1cc7d | 955 | /** |
a8605ea2 | 956 | * mei_hbm_config_features - check what hbm features and commands |
bae1cc7d TW |
957 | * are supported by the fw |
958 | * | |
959 | * @dev: the device structure | |
960 | */ | |
961 | static void mei_hbm_config_features(struct mei_device *dev) | |
962 | { | |
963 | /* Power Gating Isolation Support */ | |
964 | dev->hbm_f_pg_supported = 0; | |
965 | if (dev->version.major_version > HBM_MAJOR_VERSION_PGI) | |
966 | dev->hbm_f_pg_supported = 1; | |
967 | ||
968 | if (dev->version.major_version == HBM_MAJOR_VERSION_PGI && | |
969 | dev->version.minor_version >= HBM_MINOR_VERSION_PGI) | |
970 | dev->hbm_f_pg_supported = 1; | |
70ef835c TW |
971 | |
972 | if (dev->version.major_version >= HBM_MAJOR_VERSION_DC) | |
973 | dev->hbm_f_dc_supported = 1; | |
18901357 AU |
974 | |
975 | /* disconnect on connect timeout instead of link reset */ | |
976 | if (dev->version.major_version >= HBM_MAJOR_VERSION_DOT) | |
977 | dev->hbm_f_dot_supported = 1; | |
4d99877d TW |
978 | |
979 | /* Notification Event Support */ | |
980 | if (dev->version.major_version >= HBM_MAJOR_VERSION_EV) | |
981 | dev->hbm_f_ev_supported = 1; | |
f4e06246 AU |
982 | |
983 | /* Fixed Address Client Support */ | |
984 | if (dev->version.major_version >= HBM_MAJOR_VERSION_FA) | |
985 | dev->hbm_f_fa_supported = 1; | |
bae1cc7d | 986 | } |
bb1b0133 | 987 | |
2c9b48ac TW |
988 | /** |
989 | * mei_hbm_version_is_supported - checks whether the driver can | |
990 | * support the hbm version of the device | |
991 | * | |
992 | * @dev: the device structure | |
a8605ea2 | 993 | * Return: true if driver can support hbm version of the device |
2c9b48ac TW |
994 | */ |
995 | bool mei_hbm_version_is_supported(struct mei_device *dev) | |
996 | { | |
997 | return (dev->version.major_version < HBM_MAJOR_VERSION) || | |
998 | (dev->version.major_version == HBM_MAJOR_VERSION && | |
999 | dev->version.minor_version <= HBM_MINOR_VERSION); | |
1000 | } | |
1001 | ||
bb1b0133 TW |
1002 | /** |
1003 | * mei_hbm_dispatch - bottom half read routine after ISR to | |
1004 | * handle the read bus message cmd processing. | |
1005 | * | |
1006 | * @dev: the device structure | |
a8605ea2 | 1007 | * @hdr: header of bus message |
544f9460 | 1008 | * |
a8605ea2 | 1009 | * Return: 0 on success and < 0 on failure |
bb1b0133 | 1010 | */ |
544f9460 | 1011 | int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) |
bb1b0133 TW |
1012 | { |
1013 | struct mei_bus_message *mei_msg; | |
bb1b0133 | 1014 | struct hbm_host_version_response *version_res; |
bb1b0133 TW |
1015 | struct hbm_props_response *props_res; |
1016 | struct hbm_host_enum_response *enum_res; | |
70ef835c TW |
1017 | struct hbm_add_client_request *add_cl_req; |
1018 | int ret; | |
bb1b0133 | 1019 | |
12f45ed4 TW |
1020 | struct mei_hbm_cl_cmd *cl_cmd; |
1021 | struct hbm_client_connect_request *disconnect_req; | |
1022 | struct hbm_flow_control *flow_control; | |
1023 | ||
bb1b0133 TW |
1024 | /* read the message to our buffer */ |
1025 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); | |
1026 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); | |
1027 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; | |
12f45ed4 | 1028 | cl_cmd = (struct mei_hbm_cl_cmd *)mei_msg; |
bb1b0133 | 1029 | |
66ae460b TW |
1030 | /* ignore spurious message and prevent reset nesting |
1031 | * hbm is put to idle during system reset | |
1032 | */ | |
1033 | if (dev->hbm_state == MEI_HBM_IDLE) { | |
2bf94cab | 1034 | dev_dbg(dev->dev, "hbm: state is idle ignore spurious messages\n"); |
66ae460b TW |
1035 | return 0; |
1036 | } | |
1037 | ||
bb1b0133 TW |
1038 | switch (mei_msg->hbm_cmd) { |
1039 | case HOST_START_RES_CMD: | |
2bf94cab | 1040 | dev_dbg(dev->dev, "hbm: start: response message received.\n"); |
544f9460 TW |
1041 | |
1042 | dev->init_clients_timer = 0; | |
1043 | ||
bb1b0133 | 1044 | version_res = (struct hbm_host_version_response *)mei_msg; |
2c9b48ac | 1045 | |
2bf94cab | 1046 | dev_dbg(dev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", |
2c9b48ac TW |
1047 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, |
1048 | version_res->me_max_version.major_version, | |
1049 | version_res->me_max_version.minor_version); | |
1050 | ||
1051 | if (version_res->host_version_supported) { | |
1052 | dev->version.major_version = HBM_MAJOR_VERSION; | |
1053 | dev->version.minor_version = HBM_MINOR_VERSION; | |
1054 | } else { | |
1055 | dev->version.major_version = | |
1056 | version_res->me_max_version.major_version; | |
1057 | dev->version.minor_version = | |
1058 | version_res->me_max_version.minor_version; | |
1059 | } | |
1060 | ||
1061 | if (!mei_hbm_version_is_supported(dev)) { | |
2bf94cab | 1062 | dev_warn(dev->dev, "hbm: start: version mismatch - stopping the driver.\n"); |
bb1b0133 | 1063 | |
544f9460 | 1064 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 1065 | if (mei_hbm_stop_req(dev)) { |
2bf94cab | 1066 | dev_err(dev->dev, "hbm: start: failed to send stop request\n"); |
544f9460 TW |
1067 | return -EIO; |
1068 | } | |
1069 | break; | |
1070 | } | |
9b0d5efc | 1071 | |
bae1cc7d TW |
1072 | mei_hbm_config_features(dev); |
1073 | ||
544f9460 | 1074 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
cb02efc3 | 1075 | dev->hbm_state != MEI_HBM_STARTING) { |
2bf94cab | 1076 | dev_err(dev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
544f9460 TW |
1077 | dev->dev_state, dev->hbm_state); |
1078 | return -EPROTO; | |
e46f1874 | 1079 | } |
bb1b0133 | 1080 | |
544f9460 | 1081 | if (mei_hbm_enum_clients_req(dev)) { |
2bf94cab | 1082 | dev_err(dev->dev, "hbm: start: failed to send enumeration request\n"); |
544f9460 | 1083 | return -EIO; |
bb1b0133 TW |
1084 | } |
1085 | ||
cb02efc3 | 1086 | wake_up(&dev->wait_hbm_start); |
bb1b0133 TW |
1087 | break; |
1088 | ||
1089 | case CLIENT_CONNECT_RES_CMD: | |
2bf94cab | 1090 | dev_dbg(dev->dev, "hbm: client connect response: message received.\n"); |
12f45ed4 | 1091 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT); |
bb1b0133 TW |
1092 | break; |
1093 | ||
1094 | case CLIENT_DISCONNECT_RES_CMD: | |
2bf94cab | 1095 | dev_dbg(dev->dev, "hbm: client disconnect response: message received.\n"); |
12f45ed4 | 1096 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT); |
bb1b0133 TW |
1097 | break; |
1098 | ||
1099 | case MEI_FLOW_CONTROL_CMD: | |
2bf94cab | 1100 | dev_dbg(dev->dev, "hbm: client flow control response: message received.\n"); |
544f9460 | 1101 | |
bb1b0133 | 1102 | flow_control = (struct hbm_flow_control *) mei_msg; |
6bbda15f | 1103 | mei_hbm_cl_flow_control_res(dev, flow_control); |
bb1b0133 TW |
1104 | break; |
1105 | ||
4fcbc99b | 1106 | case MEI_PG_ISOLATION_ENTRY_RES_CMD: |
63f75232 AU |
1107 | dev_dbg(dev->dev, "hbm: power gate isolation entry response received\n"); |
1108 | ret = mei_hbm_pg_enter_res(dev); | |
1109 | if (ret) | |
1110 | return ret; | |
4fcbc99b TW |
1111 | break; |
1112 | ||
1113 | case MEI_PG_ISOLATION_EXIT_REQ_CMD: | |
63f75232 AU |
1114 | dev_dbg(dev->dev, "hbm: power gate isolation exit request received\n"); |
1115 | ret = mei_hbm_pg_exit_res(dev); | |
1116 | if (ret) | |
1117 | return ret; | |
4fcbc99b TW |
1118 | break; |
1119 | ||
bb1b0133 | 1120 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
2bf94cab | 1121 | dev_dbg(dev->dev, "hbm: properties response: message received.\n"); |
544f9460 TW |
1122 | |
1123 | dev->init_clients_timer = 0; | |
1124 | ||
5ca2d388 TW |
1125 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
1126 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { | |
2bf94cab | 1127 | dev_err(dev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
5ca2d388 | 1128 | dev->dev_state, dev->hbm_state); |
544f9460 TW |
1129 | return -EPROTO; |
1130 | } | |
1131 | ||
bb1b0133 | 1132 | props_res = (struct hbm_props_response *)mei_msg; |
bb1b0133 | 1133 | |
544f9460 | 1134 | if (props_res->status) { |
2bf94cab | 1135 | dev_err(dev->dev, "hbm: properties response: wrong status = %d %s\n", |
89778d6e TW |
1136 | props_res->status, |
1137 | mei_hbm_status_str(props_res->status)); | |
544f9460 | 1138 | return -EPROTO; |
bb1b0133 TW |
1139 | } |
1140 | ||
5ca2d388 | 1141 | mei_hbm_me_cl_add(dev, props_res); |
bb1b0133 | 1142 | |
bb1b0133 | 1143 | dev->me_client_index++; |
bb1b0133 | 1144 | |
8120e720 | 1145 | /* request property for the next client */ |
544f9460 TW |
1146 | if (mei_hbm_prop_req(dev)) |
1147 | return -EIO; | |
bb1b0133 TW |
1148 | |
1149 | break; | |
1150 | ||
1151 | case HOST_ENUM_RES_CMD: | |
2bf94cab | 1152 | dev_dbg(dev->dev, "hbm: enumeration response: message received\n"); |
544f9460 TW |
1153 | |
1154 | dev->init_clients_timer = 0; | |
1155 | ||
bb1b0133 | 1156 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
23f5a322 TW |
1157 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
1158 | < sizeof(enum_res->valid_addresses)); | |
1159 | memcpy(dev->me_clients_map, enum_res->valid_addresses, | |
5ca2d388 | 1160 | sizeof(enum_res->valid_addresses)); |
544f9460 TW |
1161 | |
1162 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || | |
1163 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { | |
2bf94cab | 1164 | dev_err(dev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", |
544f9460 TW |
1165 | dev->dev_state, dev->hbm_state); |
1166 | return -EPROTO; | |
bb1b0133 | 1167 | } |
544f9460 | 1168 | |
544f9460 TW |
1169 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
1170 | ||
1171 | /* first property request */ | |
1172 | if (mei_hbm_prop_req(dev)) | |
1173 | return -EIO; | |
1174 | ||
bb1b0133 TW |
1175 | break; |
1176 | ||
1177 | case HOST_STOP_RES_CMD: | |
2bf94cab | 1178 | dev_dbg(dev->dev, "hbm: stop response: message received\n"); |
544f9460 TW |
1179 | |
1180 | dev->init_clients_timer = 0; | |
1181 | ||
1182 | if (dev->hbm_state != MEI_HBM_STOPPED) { | |
2bf94cab | 1183 | dev_err(dev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", |
544f9460 TW |
1184 | dev->dev_state, dev->hbm_state); |
1185 | return -EPROTO; | |
1186 | } | |
9b0d5efc | 1187 | |
33ec0826 | 1188 | dev->dev_state = MEI_DEV_POWER_DOWN; |
2bf94cab | 1189 | dev_info(dev->dev, "hbm: stop response: resetting.\n"); |
544f9460 TW |
1190 | /* force the reset */ |
1191 | return -EPROTO; | |
bb1b0133 TW |
1192 | break; |
1193 | ||
1194 | case CLIENT_DISCONNECT_REQ_CMD: | |
2bf94cab | 1195 | dev_dbg(dev->dev, "hbm: disconnect request: message received\n"); |
544f9460 | 1196 | |
bb1b0133 | 1197 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
8120e720 | 1198 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
bb1b0133 TW |
1199 | break; |
1200 | ||
1201 | case ME_STOP_REQ_CMD: | |
2bf94cab | 1202 | dev_dbg(dev->dev, "hbm: stop request: message received\n"); |
544f9460 | 1203 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 1204 | if (mei_hbm_stop_req(dev)) { |
2bf94cab | 1205 | dev_err(dev->dev, "hbm: stop request: failed to send stop request\n"); |
6bb948c9 TW |
1206 | return -EIO; |
1207 | } | |
bb1b0133 | 1208 | break; |
70ef835c TW |
1209 | |
1210 | case MEI_HBM_ADD_CLIENT_REQ_CMD: | |
1211 | dev_dbg(dev->dev, "hbm: add client request received\n"); | |
1212 | /* | |
1213 | * after the host receives the enum_resp | |
1214 | * message clients may be added or removed | |
1215 | */ | |
84dfe03a | 1216 | if (dev->hbm_state <= MEI_HBM_ENUM_CLIENTS || |
70ef835c TW |
1217 | dev->hbm_state >= MEI_HBM_STOPPED) { |
1218 | dev_err(dev->dev, "hbm: add client: state mismatch, [%d, %d]\n", | |
1219 | dev->dev_state, dev->hbm_state); | |
1220 | return -EPROTO; | |
1221 | } | |
1222 | add_cl_req = (struct hbm_add_client_request *)mei_msg; | |
1223 | ret = mei_hbm_fw_add_cl_req(dev, add_cl_req); | |
1224 | if (ret) { | |
1225 | dev_err(dev->dev, "hbm: add client: failed to send response %d\n", | |
1226 | ret); | |
1227 | return -EIO; | |
1228 | } | |
1229 | dev_dbg(dev->dev, "hbm: add client request processed\n"); | |
1230 | break; | |
1231 | ||
965ae37a TW |
1232 | case MEI_HBM_NOTIFY_RES_CMD: |
1233 | dev_dbg(dev->dev, "hbm: notify response received\n"); | |
1234 | mei_hbm_cl_res(dev, cl_cmd, notify_res_to_fop(cl_cmd)); | |
1235 | break; | |
1236 | ||
1237 | case MEI_HBM_NOTIFICATION_CMD: | |
1238 | dev_dbg(dev->dev, "hbm: notification\n"); | |
1239 | mei_hbm_cl_notify(dev, cl_cmd); | |
1240 | break; | |
1241 | ||
bb1b0133 TW |
1242 | default: |
1243 | BUG(); | |
1244 | break; | |
1245 | ||
1246 | } | |
544f9460 | 1247 | return 0; |
bb1b0133 TW |
1248 | } |
1249 |