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Commit | Line | Data |
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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 | { | |
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; | |
c0ff9019 | 135 | hdr->internal = 0; |
2190fe2a TW |
136 | } |
137 | ||
cd51ed64 TW |
138 | /** |
139 | * mei_hbm_cl_hdr - construct client hbm header | |
393b148f | 140 | * |
68d1aa65 | 141 | * @cl: client |
cd51ed64 TW |
142 | * @hbm_cmd: host bus message command |
143 | * @buf: buffer for cl header | |
144 | * @len: buffer length | |
145 | */ | |
146 | static inline | |
147 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) | |
148 | { | |
149 | struct mei_hbm_cl_cmd *cmd = buf; | |
150 | ||
151 | memset(cmd, 0, len); | |
152 | ||
153 | cmd->hbm_cmd = hbm_cmd; | |
1df629ef | 154 | cmd->host_addr = mei_cl_host_addr(cl); |
d49ed64a | 155 | cmd->me_addr = mei_cl_me_id(cl); |
cd51ed64 TW |
156 | } |
157 | ||
68d1aa65 TW |
158 | /** |
159 | * mei_hbm_cl_write - write simple hbm client message | |
160 | * | |
161 | * @dev: the device structure | |
162 | * @cl: client | |
163 | * @hbm_cmd: host bus message command | |
041330d9 | 164 | * @buf: message buffer |
68d1aa65 | 165 | * @len: buffer length |
ce23139c AU |
166 | * |
167 | * Return: 0 on success, <0 on failure. | |
68d1aa65 TW |
168 | */ |
169 | static inline | |
c0ff9019 AU |
170 | int mei_hbm_cl_write(struct mei_device *dev, struct mei_cl *cl, |
171 | u8 hbm_cmd, u8 *buf, size_t len) | |
68d1aa65 | 172 | { |
c0ff9019 | 173 | struct mei_msg_hdr mei_hdr; |
68d1aa65 | 174 | |
c0ff9019 AU |
175 | mei_hbm_hdr(&mei_hdr, len); |
176 | mei_hbm_cl_hdr(cl, hbm_cmd, buf, len); | |
68d1aa65 | 177 | |
c0ff9019 | 178 | return mei_write_message(dev, &mei_hdr, buf); |
68d1aa65 TW |
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 | { |
c0ff9019 AU |
255 | struct mei_msg_hdr mei_hdr; |
256 | struct hbm_host_version_request start_req; | |
bb1b0133 | 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 | ||
c0ff9019 | 262 | mei_hbm_hdr(&mei_hdr, len); |
bb1b0133 TW |
263 | |
264 | /* host start message */ | |
c0ff9019 AU |
265 | memset(&start_req, 0, len); |
266 | start_req.hbm_cmd = HOST_START_REQ_CMD; | |
267 | start_req.host_version.major_version = HBM_MAJOR_VERSION; | |
268 | start_req.host_version.minor_version = HBM_MINOR_VERSION; | |
bb1b0133 | 269 | |
9b0d5efc | 270 | dev->hbm_state = MEI_HBM_IDLE; |
c0ff9019 | 271 | ret = mei_write_message(dev, &mei_hdr, &start_req); |
544f9460 | 272 | if (ret) { |
2bf94cab | 273 | dev_err(dev->dev, "version message write failed: ret = %d\n", |
544f9460 TW |
274 | ret); |
275 | return ret; | |
bb1b0133 | 276 | } |
544f9460 | 277 | |
cb02efc3 | 278 | dev->hbm_state = MEI_HBM_STARTING; |
bb1b0133 | 279 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
1892fc2e | 280 | mei_schedule_stall_timer(dev); |
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 | { |
c0ff9019 AU |
293 | struct mei_msg_hdr mei_hdr; |
294 | struct hbm_host_enum_request enum_req; | |
bb1b0133 | 295 | const size_t len = sizeof(struct hbm_host_enum_request); |
544f9460 TW |
296 | int ret; |
297 | ||
bb1b0133 | 298 | /* enumerate clients */ |
c0ff9019 | 299 | mei_hbm_hdr(&mei_hdr, len); |
bb1b0133 | 300 | |
c0ff9019 AU |
301 | memset(&enum_req, 0, len); |
302 | enum_req.hbm_cmd = HOST_ENUM_REQ_CMD; | |
303 | enum_req.flags |= dev->hbm_f_dc_supported ? | |
304 | MEI_HBM_ENUM_F_ALLOW_ADD : 0; | |
305 | enum_req.flags |= dev->hbm_f_ie_supported ? | |
306 | MEI_HBM_ENUM_F_IMMEDIATE_ENUM : 0; | |
bb1b0133 | 307 | |
c0ff9019 | 308 | ret = mei_write_message(dev, &mei_hdr, &enum_req); |
544f9460 | 309 | if (ret) { |
2bf94cab | 310 | dev_err(dev->dev, "enumeration request write failed: ret = %d.\n", |
544f9460 TW |
311 | ret); |
312 | return ret; | |
bb1b0133 | 313 | } |
9b0d5efc | 314 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
bb1b0133 | 315 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
1892fc2e | 316 | mei_schedule_stall_timer(dev); |
544f9460 | 317 | return 0; |
bb1b0133 TW |
318 | } |
319 | ||
99c2658f | 320 | /** |
5ca2d388 TW |
321 | * mei_hbm_me_cl_add - add new me client to the list |
322 | * | |
323 | * @dev: the device structure | |
324 | * @res: hbm property response | |
325 | * | |
a8605ea2 | 326 | * Return: 0 on success and -ENOMEM on allocation failure |
5ca2d388 TW |
327 | */ |
328 | ||
329 | static int mei_hbm_me_cl_add(struct mei_device *dev, | |
330 | struct hbm_props_response *res) | |
331 | { | |
332 | struct mei_me_client *me_cl; | |
79563db9 TW |
333 | const uuid_le *uuid = &res->client_properties.protocol_name; |
334 | ||
335 | mei_me_cl_rm_by_uuid(dev, uuid); | |
5ca2d388 TW |
336 | |
337 | me_cl = kzalloc(sizeof(struct mei_me_client), GFP_KERNEL); | |
338 | if (!me_cl) | |
339 | return -ENOMEM; | |
340 | ||
79563db9 TW |
341 | mei_me_cl_init(me_cl); |
342 | ||
5ca2d388 TW |
343 | me_cl->props = res->client_properties; |
344 | me_cl->client_id = res->me_addr; | |
4034b81b | 345 | me_cl->tx_flow_ctrl_creds = 0; |
5ca2d388 | 346 | |
b7d88514 TW |
347 | mei_me_cl_add(dev, me_cl); |
348 | ||
5ca2d388 TW |
349 | return 0; |
350 | } | |
351 | ||
70ef835c TW |
352 | /** |
353 | * mei_hbm_add_cl_resp - send response to fw on client add request | |
354 | * | |
355 | * @dev: the device structure | |
356 | * @addr: me address | |
357 | * @status: response status | |
358 | * | |
359 | * Return: 0 on success and < 0 on failure | |
360 | */ | |
361 | static int mei_hbm_add_cl_resp(struct mei_device *dev, u8 addr, u8 status) | |
362 | { | |
c0ff9019 AU |
363 | struct mei_msg_hdr mei_hdr; |
364 | struct hbm_add_client_response resp; | |
70ef835c TW |
365 | const size_t len = sizeof(struct hbm_add_client_response); |
366 | int ret; | |
367 | ||
368 | dev_dbg(dev->dev, "adding client response\n"); | |
369 | ||
c0ff9019 | 370 | mei_hbm_hdr(&mei_hdr, len); |
70ef835c | 371 | |
c0ff9019 AU |
372 | memset(&resp, 0, sizeof(struct hbm_add_client_response)); |
373 | resp.hbm_cmd = MEI_HBM_ADD_CLIENT_RES_CMD; | |
374 | resp.me_addr = addr; | |
375 | resp.status = status; | |
70ef835c | 376 | |
c0ff9019 | 377 | ret = mei_write_message(dev, &mei_hdr, &resp); |
70ef835c TW |
378 | if (ret) |
379 | dev_err(dev->dev, "add client response write failed: ret = %d\n", | |
380 | ret); | |
381 | return ret; | |
382 | } | |
383 | ||
384 | /** | |
385 | * mei_hbm_fw_add_cl_req - request from the fw to add a client | |
386 | * | |
387 | * @dev: the device structure | |
388 | * @req: add client request | |
389 | * | |
390 | * Return: 0 on success and < 0 on failure | |
391 | */ | |
392 | static int mei_hbm_fw_add_cl_req(struct mei_device *dev, | |
393 | struct hbm_add_client_request *req) | |
394 | { | |
395 | int ret; | |
396 | u8 status = MEI_HBMS_SUCCESS; | |
397 | ||
398 | BUILD_BUG_ON(sizeof(struct hbm_add_client_request) != | |
399 | sizeof(struct hbm_props_response)); | |
400 | ||
401 | ret = mei_hbm_me_cl_add(dev, (struct hbm_props_response *)req); | |
402 | if (ret) | |
403 | status = !MEI_HBMS_SUCCESS; | |
404 | ||
a816a00e AU |
405 | if (dev->dev_state == MEI_DEV_ENABLED) |
406 | schedule_work(&dev->bus_rescan_work); | |
407 | ||
70ef835c TW |
408 | return mei_hbm_add_cl_resp(dev, req->me_addr, status); |
409 | } | |
410 | ||
965ae37a TW |
411 | /** |
412 | * mei_hbm_cl_notify_req - send notification request | |
413 | * | |
414 | * @dev: the device structure | |
415 | * @cl: a client to disconnect from | |
416 | * @start: true for start false for stop | |
417 | * | |
418 | * Return: 0 on success and -EIO on write failure | |
419 | */ | |
420 | int mei_hbm_cl_notify_req(struct mei_device *dev, | |
421 | struct mei_cl *cl, u8 start) | |
422 | { | |
423 | ||
c0ff9019 AU |
424 | struct mei_msg_hdr mei_hdr; |
425 | struct hbm_notification_request req; | |
965ae37a TW |
426 | const size_t len = sizeof(struct hbm_notification_request); |
427 | int ret; | |
428 | ||
c0ff9019 AU |
429 | mei_hbm_hdr(&mei_hdr, len); |
430 | mei_hbm_cl_hdr(cl, MEI_HBM_NOTIFY_REQ_CMD, &req, len); | |
965ae37a | 431 | |
c0ff9019 | 432 | req.start = start; |
965ae37a | 433 | |
c0ff9019 | 434 | ret = mei_write_message(dev, &mei_hdr, &req); |
965ae37a TW |
435 | if (ret) |
436 | dev_err(dev->dev, "notify request failed: ret = %d\n", ret); | |
437 | ||
438 | return ret; | |
439 | } | |
440 | ||
441 | /** | |
442 | * notify_res_to_fop - convert notification response to the proper | |
443 | * notification FOP | |
444 | * | |
445 | * @cmd: client notification start response command | |
446 | * | |
447 | * Return: MEI_FOP_NOTIFY_START or MEI_FOP_NOTIFY_STOP; | |
448 | */ | |
449 | static inline enum mei_cb_file_ops notify_res_to_fop(struct mei_hbm_cl_cmd *cmd) | |
450 | { | |
451 | struct hbm_notification_response *rs = | |
452 | (struct hbm_notification_response *)cmd; | |
453 | ||
51678ccb | 454 | return mei_cl_notify_req2fop(rs->start); |
965ae37a TW |
455 | } |
456 | ||
457 | /** | |
458 | * mei_hbm_cl_notify_start_res - update the client state according | |
459 | * notify start response | |
460 | * | |
461 | * @dev: the device structure | |
462 | * @cl: mei host client | |
463 | * @cmd: client notification start response command | |
464 | */ | |
465 | static void mei_hbm_cl_notify_start_res(struct mei_device *dev, | |
466 | struct mei_cl *cl, | |
467 | struct mei_hbm_cl_cmd *cmd) | |
468 | { | |
469 | struct hbm_notification_response *rs = | |
470 | (struct hbm_notification_response *)cmd; | |
471 | ||
472 | cl_dbg(dev, cl, "hbm: notify start response status=%d\n", rs->status); | |
473 | ||
474 | if (rs->status == MEI_HBMS_SUCCESS || | |
475 | rs->status == MEI_HBMS_ALREADY_STARTED) { | |
476 | cl->notify_en = true; | |
477 | cl->status = 0; | |
478 | } else { | |
479 | cl->status = -EINVAL; | |
480 | } | |
481 | } | |
482 | ||
483 | /** | |
484 | * mei_hbm_cl_notify_stop_res - update the client state according | |
485 | * notify stop response | |
486 | * | |
487 | * @dev: the device structure | |
488 | * @cl: mei host client | |
489 | * @cmd: client notification stop response command | |
490 | */ | |
491 | static void mei_hbm_cl_notify_stop_res(struct mei_device *dev, | |
492 | struct mei_cl *cl, | |
493 | struct mei_hbm_cl_cmd *cmd) | |
494 | { | |
495 | struct hbm_notification_response *rs = | |
496 | (struct hbm_notification_response *)cmd; | |
497 | ||
498 | cl_dbg(dev, cl, "hbm: notify stop response status=%d\n", rs->status); | |
499 | ||
500 | if (rs->status == MEI_HBMS_SUCCESS || | |
501 | rs->status == MEI_HBMS_NOT_STARTED) { | |
502 | cl->notify_en = false; | |
503 | cl->status = 0; | |
504 | } else { | |
505 | /* TODO: spec is not clear yet about other possible issues */ | |
506 | cl->status = -EINVAL; | |
507 | } | |
508 | } | |
509 | ||
510 | /** | |
511 | * mei_hbm_cl_notify - signal notification event | |
512 | * | |
513 | * @dev: the device structure | |
514 | * @cmd: notification client message | |
515 | */ | |
516 | static void mei_hbm_cl_notify(struct mei_device *dev, | |
517 | struct mei_hbm_cl_cmd *cmd) | |
518 | { | |
519 | struct mei_cl *cl; | |
520 | ||
521 | cl = mei_hbm_cl_find_by_cmd(dev, cmd); | |
237092bf TW |
522 | if (cl) |
523 | mei_cl_notify(cl); | |
965ae37a TW |
524 | } |
525 | ||
8120e720 | 526 | /** |
393b148f | 527 | * mei_hbm_prop_req - request property for a single client |
8120e720 TW |
528 | * |
529 | * @dev: the device structure | |
cc25aa94 | 530 | * @start_idx: client index to start search |
8120e720 | 531 | * |
a8605ea2 | 532 | * Return: 0 on success and < 0 on failure |
8120e720 | 533 | */ |
cc25aa94 | 534 | static int mei_hbm_prop_req(struct mei_device *dev, unsigned long start_idx) |
bb1b0133 | 535 | { |
c0ff9019 AU |
536 | struct mei_msg_hdr mei_hdr; |
537 | struct hbm_props_request prop_req; | |
bb1b0133 | 538 | const size_t len = sizeof(struct hbm_props_request); |
cc25aa94 | 539 | unsigned long addr; |
544f9460 | 540 | int ret; |
bb1b0133 | 541 | |
cc25aa94 | 542 | addr = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, start_idx); |
bb1b0133 TW |
543 | |
544 | /* We got all client properties */ | |
cc25aa94 | 545 | if (addr == MEI_CLIENTS_MAX) { |
9b0d5efc | 546 | dev->hbm_state = MEI_HBM_STARTED; |
025fb792 | 547 | mei_host_client_init(dev); |
bb1b0133 TW |
548 | |
549 | return 0; | |
550 | } | |
551 | ||
c0ff9019 | 552 | mei_hbm_hdr(&mei_hdr, len); |
bb1b0133 | 553 | |
c0ff9019 | 554 | memset(&prop_req, 0, sizeof(struct hbm_props_request)); |
bb1b0133 | 555 | |
c0ff9019 AU |
556 | prop_req.hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
557 | prop_req.me_addr = addr; | |
bb1b0133 | 558 | |
c0ff9019 | 559 | ret = mei_write_message(dev, &mei_hdr, &prop_req); |
544f9460 | 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; | |
1892fc2e | 567 | mei_schedule_stall_timer(dev); |
bb1b0133 TW |
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 | { | |
c0ff9019 AU |
583 | struct mei_msg_hdr mei_hdr; |
584 | struct hbm_power_gate req; | |
4fcbc99b TW |
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 | ||
c0ff9019 | 591 | mei_hbm_hdr(&mei_hdr, len); |
4fcbc99b | 592 | |
c0ff9019 AU |
593 | memset(&req, 0, len); |
594 | req.hbm_cmd = pg_cmd; | |
4fcbc99b | 595 | |
c0ff9019 | 596 | ret = mei_write_message(dev, &mei_hdr, &req); |
4fcbc99b | 597 | if (ret) |
2bf94cab | 598 | dev_err(dev->dev, "power gate command write failed.\n"); |
4fcbc99b TW |
599 | return ret; |
600 | } | |
601 | EXPORT_SYMBOL_GPL(mei_hbm_pg); | |
602 | ||
e46f1874 | 603 | /** |
6bb948c9 | 604 | * mei_hbm_stop_req - send stop request message |
e46f1874 | 605 | * |
a8605ea2 | 606 | * @dev: mei device |
6bb948c9 | 607 | * |
a8605ea2 | 608 | * Return: -EIO on write failure |
e46f1874 | 609 | */ |
6bb948c9 | 610 | static int mei_hbm_stop_req(struct mei_device *dev) |
e46f1874 | 611 | { |
c0ff9019 AU |
612 | struct mei_msg_hdr mei_hdr; |
613 | struct hbm_host_stop_request req; | |
e46f1874 TW |
614 | const size_t len = sizeof(struct hbm_host_stop_request); |
615 | ||
c0ff9019 | 616 | mei_hbm_hdr(&mei_hdr, len); |
e46f1874 | 617 | |
c0ff9019 AU |
618 | memset(&req, 0, len); |
619 | req.hbm_cmd = HOST_STOP_REQ_CMD; | |
620 | req.reason = DRIVER_STOP_REQUEST; | |
6bb948c9 | 621 | |
c0ff9019 | 622 | return mei_write_message(dev, &mei_hdr, &req); |
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); |
c0ff9019 | 636 | u8 buf[len]; |
92db1555 | 637 | |
46922186 | 638 | cl_dbg(dev, cl, "sending flow control\n"); |
c0ff9019 | 639 | return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, buf, len); |
bb1b0133 TW |
640 | } |
641 | ||
6bbda15f | 642 | /** |
4034b81b | 643 | * mei_hbm_add_single_tx_flow_ctrl_creds - adds single buffer credentials. |
6bbda15f | 644 | * |
393b148f | 645 | * @dev: the device structure |
4034b81b | 646 | * @fctrl: flow control response bus message |
12d00665 | 647 | * |
a8605ea2 | 648 | * Return: 0 on success, < 0 otherwise |
6bbda15f | 649 | */ |
4034b81b TW |
650 | static int mei_hbm_add_single_tx_flow_ctrl_creds(struct mei_device *dev, |
651 | struct hbm_flow_control *fctrl) | |
6bbda15f | 652 | { |
12d00665 | 653 | struct mei_me_client *me_cl; |
79563db9 | 654 | int rets; |
12d00665 | 655 | |
4034b81b | 656 | me_cl = mei_me_cl_by_id(dev, fctrl->me_addr); |
d320832f | 657 | if (!me_cl) { |
4034b81b | 658 | dev_err(dev->dev, "no such me client %d\n", fctrl->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 | 666 | |
4034b81b | 667 | me_cl->tx_flow_ctrl_creds++; |
2bf94cab | 668 | dev_dbg(dev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n", |
4034b81b | 669 | fctrl->me_addr, me_cl->tx_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 | |
4034b81b | 681 | * @fctrl: flow control response bus message |
6bbda15f | 682 | */ |
4034b81b TW |
683 | static void mei_hbm_cl_tx_flow_ctrl_creds_res(struct mei_device *dev, |
684 | struct hbm_flow_control *fctrl) | |
6bbda15f | 685 | { |
31f88f57 | 686 | struct mei_cl *cl; |
6bbda15f | 687 | |
4034b81b | 688 | if (!fctrl->host_addr) { |
6bbda15f | 689 | /* single receive buffer */ |
4034b81b | 690 | mei_hbm_add_single_tx_flow_ctrl_creds(dev, fctrl); |
6bbda15f TW |
691 | return; |
692 | } | |
693 | ||
4034b81b | 694 | cl = mei_hbm_cl_find_by_cmd(dev, fctrl); |
2af89db1 | 695 | if (cl) { |
4034b81b | 696 | cl->tx_flow_ctrl_creds++; |
2af89db1 | 697 | cl_dbg(dev, cl, "flow control creds = %d.\n", |
4034b81b | 698 | cl->tx_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); |
c0ff9019 | 714 | u8 buf[len]; |
92db1555 | 715 | |
c0ff9019 | 716 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, buf, len); |
bb1b0133 TW |
717 | } |
718 | ||
6bb948c9 TW |
719 | /** |
720 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW | |
721 | * | |
722 | * @dev: the device structure | |
723 | * @cl: a client to disconnect from | |
724 | * | |
a8605ea2 | 725 | * Return: -EIO on write failure |
6bb948c9 TW |
726 | */ |
727 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) | |
728 | { | |
6bb948c9 | 729 | const size_t len = sizeof(struct hbm_client_connect_response); |
c0ff9019 | 730 | u8 buf[len]; |
92db1555 | 731 | |
c0ff9019 | 732 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, buf, 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); |
c0ff9019 | 767 | u8 buf[len]; |
92db1555 | 768 | |
c0ff9019 | 769 | return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, buf, len); |
bb1b0133 TW |
770 | } |
771 | ||
6bbda15f | 772 | /** |
12f45ed4 TW |
773 | * mei_hbm_cl_connect_res - update the client state according |
774 | * connection response | |
6bbda15f | 775 | * |
d512c209 | 776 | * @dev: the device structure |
12f45ed4 TW |
777 | * @cl: mei host client |
778 | * @cmd: connect client response host bus message | |
6bbda15f | 779 | */ |
d512c209 | 780 | static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl, |
12f45ed4 | 781 | struct mei_hbm_cl_cmd *cmd) |
6bbda15f | 782 | { |
12f45ed4 TW |
783 | struct hbm_client_connect_response *rs = |
784 | (struct hbm_client_connect_response *)cmd; | |
6bbda15f | 785 | |
d512c209 | 786 | cl_dbg(dev, cl, "hbm: connect response status=%s\n", |
285e2996 | 787 | mei_cl_conn_status_str(rs->status)); |
6bbda15f | 788 | |
12f45ed4 TW |
789 | if (rs->status == MEI_CL_CONN_SUCCESS) |
790 | cl->state = MEI_FILE_CONNECTED; | |
70ef835c | 791 | else { |
3c666182 | 792 | cl->state = MEI_FILE_DISCONNECT_REPLY; |
a816a00e | 793 | if (rs->status == MEI_CL_CONN_NOT_FOUND) { |
70ef835c | 794 | mei_me_cl_del(dev, cl->me_cl); |
a816a00e AU |
795 | if (dev->dev_state == MEI_DEV_ENABLED) |
796 | schedule_work(&dev->bus_rescan_work); | |
797 | } | |
70ef835c | 798 | } |
12f45ed4 TW |
799 | cl->status = mei_cl_conn_status_to_errno(rs->status); |
800 | } | |
801 | ||
802 | /** | |
803 | * mei_hbm_cl_res - process hbm response received on behalf | |
804 | * an client | |
805 | * | |
806 | * @dev: the device structure | |
807 | * @rs: hbm client message | |
808 | * @fop_type: file operation type | |
809 | */ | |
810 | static void mei_hbm_cl_res(struct mei_device *dev, | |
811 | struct mei_hbm_cl_cmd *rs, | |
812 | enum mei_cb_file_ops fop_type) | |
813 | { | |
814 | struct mei_cl *cl; | |
815 | struct mei_cl_cb *cb, *next; | |
6bbda15f | 816 | |
12f45ed4 | 817 | cl = NULL; |
64092858 | 818 | list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { |
6bbda15f | 819 | |
64092858 | 820 | cl = cb->cl; |
6bbda15f | 821 | |
12f45ed4 | 822 | if (cb->fop_type != fop_type) |
64092858 | 823 | continue; |
6bbda15f | 824 | |
64092858 | 825 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
928fa666 | 826 | list_del_init(&cb->list); |
64092858 | 827 | break; |
6bbda15f TW |
828 | } |
829 | } | |
64092858 TW |
830 | |
831 | if (!cl) | |
832 | return; | |
833 | ||
12f45ed4 TW |
834 | switch (fop_type) { |
835 | case MEI_FOP_CONNECT: | |
d512c209 | 836 | mei_hbm_cl_connect_res(dev, cl, rs); |
12f45ed4 TW |
837 | break; |
838 | case MEI_FOP_DISCONNECT: | |
d512c209 | 839 | mei_hbm_cl_disconnect_res(dev, cl, rs); |
12f45ed4 | 840 | break; |
965ae37a TW |
841 | case MEI_FOP_NOTIFY_START: |
842 | mei_hbm_cl_notify_start_res(dev, cl, rs); | |
843 | break; | |
844 | case MEI_FOP_NOTIFY_STOP: | |
845 | mei_hbm_cl_notify_stop_res(dev, cl, rs); | |
846 | break; | |
12f45ed4 TW |
847 | default: |
848 | return; | |
849 | } | |
850 | ||
64092858 | 851 | cl->timer_count = 0; |
12f45ed4 | 852 | wake_up(&cl->wait); |
6bbda15f TW |
853 | } |
854 | ||
855 | ||
bb1b0133 | 856 | /** |
83ce0741 AU |
857 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
858 | * host sends disconnect response | |
bb1b0133 TW |
859 | * |
860 | * @dev: the device structure. | |
8120e720 | 861 | * @disconnect_req: disconnect request bus message from the me |
6bb948c9 | 862 | * |
a8605ea2 | 863 | * Return: -ENOMEM on allocation failure |
bb1b0133 | 864 | */ |
6bb948c9 | 865 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
bb1b0133 TW |
866 | struct hbm_client_connect_request *disconnect_req) |
867 | { | |
31f88f57 | 868 | struct mei_cl *cl; |
6bb948c9 | 869 | struct mei_cl_cb *cb; |
bb1b0133 | 870 | |
2af89db1 TW |
871 | cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req); |
872 | if (cl) { | |
6938c192 | 873 | cl_warn(dev, cl, "fw disconnect request received\n"); |
3c666182 | 874 | cl->state = MEI_FILE_DISCONNECTING; |
2af89db1 TW |
875 | cl->timer_count = 0; |
876 | ||
3030dc05 TW |
877 | cb = mei_cl_enqueue_ctrl_wr_cb(cl, 0, MEI_FOP_DISCONNECT_RSP, |
878 | NULL); | |
2af89db1 TW |
879 | if (!cb) |
880 | return -ENOMEM; | |
bb1b0133 | 881 | } |
6bb948c9 | 882 | return 0; |
bb1b0133 TW |
883 | } |
884 | ||
63f75232 AU |
885 | /** |
886 | * mei_hbm_pg_enter_res - PG enter response received | |
887 | * | |
888 | * @dev: the device structure. | |
889 | * | |
890 | * Return: 0 on success, -EPROTO on state mismatch | |
891 | */ | |
892 | static int mei_hbm_pg_enter_res(struct mei_device *dev) | |
893 | { | |
894 | if (mei_pg_state(dev) != MEI_PG_OFF || | |
895 | dev->pg_event != MEI_PG_EVENT_WAIT) { | |
896 | dev_err(dev->dev, "hbm: pg entry response: state mismatch [%s, %d]\n", | |
897 | mei_pg_state_str(mei_pg_state(dev)), dev->pg_event); | |
898 | return -EPROTO; | |
899 | } | |
900 | ||
901 | dev->pg_event = MEI_PG_EVENT_RECEIVED; | |
902 | wake_up(&dev->wait_pg); | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
859ef2ff AU |
907 | /** |
908 | * mei_hbm_pg_resume - process with PG resume | |
909 | * | |
910 | * @dev: the device structure. | |
911 | */ | |
912 | void mei_hbm_pg_resume(struct mei_device *dev) | |
913 | { | |
914 | pm_request_resume(dev->dev); | |
915 | } | |
916 | EXPORT_SYMBOL_GPL(mei_hbm_pg_resume); | |
917 | ||
63f75232 AU |
918 | /** |
919 | * mei_hbm_pg_exit_res - PG exit response received | |
920 | * | |
921 | * @dev: the device structure. | |
922 | * | |
923 | * Return: 0 on success, -EPROTO on state mismatch | |
924 | */ | |
925 | static int mei_hbm_pg_exit_res(struct mei_device *dev) | |
926 | { | |
927 | if (mei_pg_state(dev) != MEI_PG_ON || | |
928 | (dev->pg_event != MEI_PG_EVENT_WAIT && | |
929 | dev->pg_event != MEI_PG_EVENT_IDLE)) { | |
930 | dev_err(dev->dev, "hbm: pg exit response: state mismatch [%s, %d]\n", | |
931 | mei_pg_state_str(mei_pg_state(dev)), dev->pg_event); | |
932 | return -EPROTO; | |
933 | } | |
934 | ||
935 | switch (dev->pg_event) { | |
936 | case MEI_PG_EVENT_WAIT: | |
937 | dev->pg_event = MEI_PG_EVENT_RECEIVED; | |
938 | wake_up(&dev->wait_pg); | |
939 | break; | |
940 | case MEI_PG_EVENT_IDLE: | |
941 | /* | |
942 | * If the driver is not waiting on this then | |
943 | * this is HW initiated exit from PG. | |
944 | * Start runtime pm resume sequence to exit from PG. | |
945 | */ | |
946 | dev->pg_event = MEI_PG_EVENT_RECEIVED; | |
859ef2ff | 947 | mei_hbm_pg_resume(dev); |
63f75232 AU |
948 | break; |
949 | default: | |
950 | WARN(1, "hbm: pg exit response: unexpected pg event = %d\n", | |
951 | dev->pg_event); | |
952 | return -EPROTO; | |
953 | } | |
954 | ||
955 | return 0; | |
956 | } | |
957 | ||
bae1cc7d | 958 | /** |
a8605ea2 | 959 | * mei_hbm_config_features - check what hbm features and commands |
bae1cc7d TW |
960 | * are supported by the fw |
961 | * | |
962 | * @dev: the device structure | |
963 | */ | |
964 | static void mei_hbm_config_features(struct mei_device *dev) | |
965 | { | |
966 | /* Power Gating Isolation Support */ | |
967 | dev->hbm_f_pg_supported = 0; | |
968 | if (dev->version.major_version > HBM_MAJOR_VERSION_PGI) | |
969 | dev->hbm_f_pg_supported = 1; | |
970 | ||
971 | if (dev->version.major_version == HBM_MAJOR_VERSION_PGI && | |
972 | dev->version.minor_version >= HBM_MINOR_VERSION_PGI) | |
973 | dev->hbm_f_pg_supported = 1; | |
70ef835c TW |
974 | |
975 | if (dev->version.major_version >= HBM_MAJOR_VERSION_DC) | |
976 | dev->hbm_f_dc_supported = 1; | |
18901357 | 977 | |
27f476ea AU |
978 | if (dev->version.major_version >= HBM_MAJOR_VERSION_IE) |
979 | dev->hbm_f_ie_supported = 1; | |
980 | ||
18901357 AU |
981 | /* disconnect on connect timeout instead of link reset */ |
982 | if (dev->version.major_version >= HBM_MAJOR_VERSION_DOT) | |
983 | dev->hbm_f_dot_supported = 1; | |
4d99877d TW |
984 | |
985 | /* Notification Event Support */ | |
986 | if (dev->version.major_version >= HBM_MAJOR_VERSION_EV) | |
987 | dev->hbm_f_ev_supported = 1; | |
f4e06246 AU |
988 | |
989 | /* Fixed Address Client Support */ | |
990 | if (dev->version.major_version >= HBM_MAJOR_VERSION_FA) | |
991 | dev->hbm_f_fa_supported = 1; | |
7ee7f45a AU |
992 | |
993 | /* OS ver message Support */ | |
994 | if (dev->version.major_version >= HBM_MAJOR_VERSION_OS) | |
995 | dev->hbm_f_os_supported = 1; | |
bae1cc7d | 996 | } |
bb1b0133 | 997 | |
2c9b48ac TW |
998 | /** |
999 | * mei_hbm_version_is_supported - checks whether the driver can | |
1000 | * support the hbm version of the device | |
1001 | * | |
1002 | * @dev: the device structure | |
a8605ea2 | 1003 | * Return: true if driver can support hbm version of the device |
2c9b48ac TW |
1004 | */ |
1005 | bool mei_hbm_version_is_supported(struct mei_device *dev) | |
1006 | { | |
1007 | return (dev->version.major_version < HBM_MAJOR_VERSION) || | |
1008 | (dev->version.major_version == HBM_MAJOR_VERSION && | |
1009 | dev->version.minor_version <= HBM_MINOR_VERSION); | |
1010 | } | |
1011 | ||
bb1b0133 TW |
1012 | /** |
1013 | * mei_hbm_dispatch - bottom half read routine after ISR to | |
1014 | * handle the read bus message cmd processing. | |
1015 | * | |
1016 | * @dev: the device structure | |
a8605ea2 | 1017 | * @hdr: header of bus message |
544f9460 | 1018 | * |
a8605ea2 | 1019 | * Return: 0 on success and < 0 on failure |
bb1b0133 | 1020 | */ |
544f9460 | 1021 | int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) |
bb1b0133 TW |
1022 | { |
1023 | struct mei_bus_message *mei_msg; | |
bb1b0133 | 1024 | struct hbm_host_version_response *version_res; |
bb1b0133 TW |
1025 | struct hbm_props_response *props_res; |
1026 | struct hbm_host_enum_response *enum_res; | |
70ef835c TW |
1027 | struct hbm_add_client_request *add_cl_req; |
1028 | int ret; | |
bb1b0133 | 1029 | |
12f45ed4 TW |
1030 | struct mei_hbm_cl_cmd *cl_cmd; |
1031 | struct hbm_client_connect_request *disconnect_req; | |
4034b81b | 1032 | struct hbm_flow_control *fctrl; |
12f45ed4 | 1033 | |
bb1b0133 TW |
1034 | /* read the message to our buffer */ |
1035 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); | |
1036 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); | |
1037 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; | |
12f45ed4 | 1038 | cl_cmd = (struct mei_hbm_cl_cmd *)mei_msg; |
bb1b0133 | 1039 | |
66ae460b TW |
1040 | /* ignore spurious message and prevent reset nesting |
1041 | * hbm is put to idle during system reset | |
1042 | */ | |
1043 | if (dev->hbm_state == MEI_HBM_IDLE) { | |
2bf94cab | 1044 | dev_dbg(dev->dev, "hbm: state is idle ignore spurious messages\n"); |
66ae460b TW |
1045 | return 0; |
1046 | } | |
1047 | ||
bb1b0133 TW |
1048 | switch (mei_msg->hbm_cmd) { |
1049 | case HOST_START_RES_CMD: | |
2bf94cab | 1050 | dev_dbg(dev->dev, "hbm: start: response message received.\n"); |
544f9460 TW |
1051 | |
1052 | dev->init_clients_timer = 0; | |
1053 | ||
bb1b0133 | 1054 | version_res = (struct hbm_host_version_response *)mei_msg; |
2c9b48ac | 1055 | |
2bf94cab | 1056 | dev_dbg(dev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", |
2c9b48ac TW |
1057 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, |
1058 | version_res->me_max_version.major_version, | |
1059 | version_res->me_max_version.minor_version); | |
1060 | ||
1061 | if (version_res->host_version_supported) { | |
1062 | dev->version.major_version = HBM_MAJOR_VERSION; | |
1063 | dev->version.minor_version = HBM_MINOR_VERSION; | |
1064 | } else { | |
1065 | dev->version.major_version = | |
1066 | version_res->me_max_version.major_version; | |
1067 | dev->version.minor_version = | |
1068 | version_res->me_max_version.minor_version; | |
1069 | } | |
1070 | ||
1071 | if (!mei_hbm_version_is_supported(dev)) { | |
2bf94cab | 1072 | dev_warn(dev->dev, "hbm: start: version mismatch - stopping the driver.\n"); |
bb1b0133 | 1073 | |
544f9460 | 1074 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 1075 | if (mei_hbm_stop_req(dev)) { |
2bf94cab | 1076 | dev_err(dev->dev, "hbm: start: failed to send stop request\n"); |
544f9460 TW |
1077 | return -EIO; |
1078 | } | |
1079 | break; | |
1080 | } | |
9b0d5efc | 1081 | |
bae1cc7d TW |
1082 | mei_hbm_config_features(dev); |
1083 | ||
544f9460 | 1084 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
cb02efc3 | 1085 | dev->hbm_state != MEI_HBM_STARTING) { |
2bf94cab | 1086 | dev_err(dev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
544f9460 TW |
1087 | dev->dev_state, dev->hbm_state); |
1088 | return -EPROTO; | |
e46f1874 | 1089 | } |
bb1b0133 | 1090 | |
544f9460 | 1091 | if (mei_hbm_enum_clients_req(dev)) { |
2bf94cab | 1092 | dev_err(dev->dev, "hbm: start: failed to send enumeration request\n"); |
544f9460 | 1093 | return -EIO; |
bb1b0133 TW |
1094 | } |
1095 | ||
cb02efc3 | 1096 | wake_up(&dev->wait_hbm_start); |
bb1b0133 TW |
1097 | break; |
1098 | ||
1099 | case CLIENT_CONNECT_RES_CMD: | |
2bf94cab | 1100 | dev_dbg(dev->dev, "hbm: client connect response: message received.\n"); |
12f45ed4 | 1101 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT); |
bb1b0133 TW |
1102 | break; |
1103 | ||
1104 | case CLIENT_DISCONNECT_RES_CMD: | |
2bf94cab | 1105 | dev_dbg(dev->dev, "hbm: client disconnect response: message received.\n"); |
12f45ed4 | 1106 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT); |
bb1b0133 TW |
1107 | break; |
1108 | ||
1109 | case MEI_FLOW_CONTROL_CMD: | |
2bf94cab | 1110 | dev_dbg(dev->dev, "hbm: client flow control response: message received.\n"); |
544f9460 | 1111 | |
4034b81b TW |
1112 | fctrl = (struct hbm_flow_control *)mei_msg; |
1113 | mei_hbm_cl_tx_flow_ctrl_creds_res(dev, fctrl); | |
bb1b0133 TW |
1114 | break; |
1115 | ||
4fcbc99b | 1116 | case MEI_PG_ISOLATION_ENTRY_RES_CMD: |
63f75232 AU |
1117 | dev_dbg(dev->dev, "hbm: power gate isolation entry response received\n"); |
1118 | ret = mei_hbm_pg_enter_res(dev); | |
1119 | if (ret) | |
1120 | return ret; | |
4fcbc99b TW |
1121 | break; |
1122 | ||
1123 | case MEI_PG_ISOLATION_EXIT_REQ_CMD: | |
63f75232 AU |
1124 | dev_dbg(dev->dev, "hbm: power gate isolation exit request received\n"); |
1125 | ret = mei_hbm_pg_exit_res(dev); | |
1126 | if (ret) | |
1127 | return ret; | |
4fcbc99b TW |
1128 | break; |
1129 | ||
bb1b0133 | 1130 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
2bf94cab | 1131 | dev_dbg(dev->dev, "hbm: properties response: message received.\n"); |
544f9460 TW |
1132 | |
1133 | dev->init_clients_timer = 0; | |
1134 | ||
5ca2d388 TW |
1135 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
1136 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { | |
2bf94cab | 1137 | dev_err(dev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
5ca2d388 | 1138 | dev->dev_state, dev->hbm_state); |
544f9460 TW |
1139 | return -EPROTO; |
1140 | } | |
1141 | ||
bb1b0133 | 1142 | props_res = (struct hbm_props_response *)mei_msg; |
bb1b0133 | 1143 | |
544f9460 | 1144 | if (props_res->status) { |
2bf94cab | 1145 | dev_err(dev->dev, "hbm: properties response: wrong status = %d %s\n", |
89778d6e TW |
1146 | props_res->status, |
1147 | mei_hbm_status_str(props_res->status)); | |
544f9460 | 1148 | return -EPROTO; |
bb1b0133 TW |
1149 | } |
1150 | ||
5ca2d388 | 1151 | mei_hbm_me_cl_add(dev, props_res); |
bb1b0133 | 1152 | |
8120e720 | 1153 | /* request property for the next client */ |
cc25aa94 | 1154 | if (mei_hbm_prop_req(dev, props_res->me_addr + 1)) |
544f9460 | 1155 | return -EIO; |
bb1b0133 TW |
1156 | |
1157 | break; | |
1158 | ||
1159 | case HOST_ENUM_RES_CMD: | |
2bf94cab | 1160 | dev_dbg(dev->dev, "hbm: enumeration response: message received\n"); |
544f9460 TW |
1161 | |
1162 | dev->init_clients_timer = 0; | |
1163 | ||
bb1b0133 | 1164 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
23f5a322 TW |
1165 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
1166 | < sizeof(enum_res->valid_addresses)); | |
1167 | memcpy(dev->me_clients_map, enum_res->valid_addresses, | |
5ca2d388 | 1168 | sizeof(enum_res->valid_addresses)); |
544f9460 TW |
1169 | |
1170 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || | |
1171 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { | |
2bf94cab | 1172 | dev_err(dev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", |
544f9460 TW |
1173 | dev->dev_state, dev->hbm_state); |
1174 | return -EPROTO; | |
bb1b0133 | 1175 | } |
544f9460 | 1176 | |
544f9460 TW |
1177 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
1178 | ||
1179 | /* first property request */ | |
cc25aa94 | 1180 | if (mei_hbm_prop_req(dev, 0)) |
544f9460 TW |
1181 | return -EIO; |
1182 | ||
bb1b0133 TW |
1183 | break; |
1184 | ||
1185 | case HOST_STOP_RES_CMD: | |
2bf94cab | 1186 | dev_dbg(dev->dev, "hbm: stop response: message received\n"); |
544f9460 TW |
1187 | |
1188 | dev->init_clients_timer = 0; | |
1189 | ||
1190 | if (dev->hbm_state != MEI_HBM_STOPPED) { | |
2bf94cab | 1191 | dev_err(dev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", |
544f9460 TW |
1192 | dev->dev_state, dev->hbm_state); |
1193 | return -EPROTO; | |
1194 | } | |
9b0d5efc | 1195 | |
33ec0826 | 1196 | dev->dev_state = MEI_DEV_POWER_DOWN; |
2bf94cab | 1197 | dev_info(dev->dev, "hbm: stop response: resetting.\n"); |
544f9460 TW |
1198 | /* force the reset */ |
1199 | return -EPROTO; | |
bb1b0133 TW |
1200 | break; |
1201 | ||
1202 | case CLIENT_DISCONNECT_REQ_CMD: | |
2bf94cab | 1203 | dev_dbg(dev->dev, "hbm: disconnect request: message received\n"); |
544f9460 | 1204 | |
bb1b0133 | 1205 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
8120e720 | 1206 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
bb1b0133 TW |
1207 | break; |
1208 | ||
1209 | case ME_STOP_REQ_CMD: | |
2bf94cab | 1210 | dev_dbg(dev->dev, "hbm: stop request: message received\n"); |
544f9460 | 1211 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 1212 | if (mei_hbm_stop_req(dev)) { |
2bf94cab | 1213 | dev_err(dev->dev, "hbm: stop request: failed to send stop request\n"); |
6bb948c9 TW |
1214 | return -EIO; |
1215 | } | |
bb1b0133 | 1216 | break; |
70ef835c TW |
1217 | |
1218 | case MEI_HBM_ADD_CLIENT_REQ_CMD: | |
1219 | dev_dbg(dev->dev, "hbm: add client request received\n"); | |
1220 | /* | |
1221 | * after the host receives the enum_resp | |
1222 | * message clients may be added or removed | |
1223 | */ | |
84dfe03a | 1224 | if (dev->hbm_state <= MEI_HBM_ENUM_CLIENTS || |
70ef835c TW |
1225 | dev->hbm_state >= MEI_HBM_STOPPED) { |
1226 | dev_err(dev->dev, "hbm: add client: state mismatch, [%d, %d]\n", | |
1227 | dev->dev_state, dev->hbm_state); | |
1228 | return -EPROTO; | |
1229 | } | |
1230 | add_cl_req = (struct hbm_add_client_request *)mei_msg; | |
1231 | ret = mei_hbm_fw_add_cl_req(dev, add_cl_req); | |
1232 | if (ret) { | |
1233 | dev_err(dev->dev, "hbm: add client: failed to send response %d\n", | |
1234 | ret); | |
1235 | return -EIO; | |
1236 | } | |
1237 | dev_dbg(dev->dev, "hbm: add client request processed\n"); | |
1238 | break; | |
1239 | ||
965ae37a TW |
1240 | case MEI_HBM_NOTIFY_RES_CMD: |
1241 | dev_dbg(dev->dev, "hbm: notify response received\n"); | |
1242 | mei_hbm_cl_res(dev, cl_cmd, notify_res_to_fop(cl_cmd)); | |
1243 | break; | |
1244 | ||
1245 | case MEI_HBM_NOTIFICATION_CMD: | |
1246 | dev_dbg(dev->dev, "hbm: notification\n"); | |
1247 | mei_hbm_cl_notify(dev, cl_cmd); | |
1248 | break; | |
1249 | ||
bb1b0133 TW |
1250 | default: |
1251 | BUG(); | |
1252 | break; | |
1253 | ||
1254 | } | |
544f9460 | 1255 | return 0; |
bb1b0133 TW |
1256 | } |
1257 |