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/pci.h> |
19 | #include <linux/sched.h> | |
20 | #include <linux/wait.h> | |
21 | #include <linux/mei.h> | |
180ea05b | 22 | #include <linux/pm_runtime.h> |
bb1b0133 TW |
23 | |
24 | #include "mei_dev.h" | |
0edb23fc | 25 | #include "hbm.h" |
12d00665 | 26 | #include "client.h" |
bb1b0133 | 27 | |
89778d6e TW |
28 | static const char *mei_hbm_status_str(enum mei_hbm_status status) |
29 | { | |
30 | #define MEI_HBM_STATUS(status) case MEI_HBMS_##status: return #status | |
31 | switch (status) { | |
32 | MEI_HBM_STATUS(SUCCESS); | |
33 | MEI_HBM_STATUS(CLIENT_NOT_FOUND); | |
34 | MEI_HBM_STATUS(ALREADY_EXISTS); | |
35 | MEI_HBM_STATUS(REJECTED); | |
36 | MEI_HBM_STATUS(INVALID_PARAMETER); | |
37 | MEI_HBM_STATUS(NOT_ALLOWED); | |
38 | MEI_HBM_STATUS(ALREADY_STARTED); | |
39 | MEI_HBM_STATUS(NOT_STARTED); | |
40 | default: return "unknown"; | |
41 | } | |
42 | #undef MEI_HBM_STATUS | |
43 | }; | |
44 | ||
285e2996 AU |
45 | static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status) |
46 | { | |
47 | #define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status | |
48 | switch (status) { | |
49 | MEI_CL_CS(SUCCESS); | |
50 | MEI_CL_CS(NOT_FOUND); | |
51 | MEI_CL_CS(ALREADY_STARTED); | |
52 | MEI_CL_CS(OUT_OF_RESOURCES); | |
53 | MEI_CL_CS(MESSAGE_SMALL); | |
54 | default: return "unknown"; | |
55 | } | |
56 | #undef MEI_CL_CCS | |
57 | } | |
58 | ||
1beeb4b9 AU |
59 | const char *mei_hbm_state_str(enum mei_hbm_state state) |
60 | { | |
61 | #define MEI_HBM_STATE(state) case MEI_HBM_##state: return #state | |
62 | switch (state) { | |
63 | MEI_HBM_STATE(IDLE); | |
64 | MEI_HBM_STATE(STARTING); | |
65 | MEI_HBM_STATE(STARTED); | |
66 | MEI_HBM_STATE(ENUM_CLIENTS); | |
67 | MEI_HBM_STATE(CLIENT_PROPERTIES); | |
68 | MEI_HBM_STATE(STOPPED); | |
69 | default: | |
70 | return "unknown"; | |
71 | } | |
72 | #undef MEI_HBM_STATE | |
73 | } | |
74 | ||
285e2996 AU |
75 | /** |
76 | * mei_cl_conn_status_to_errno - convert client connect response | |
77 | * status to error code | |
78 | * | |
79 | * @status: client connect response status | |
80 | * | |
81 | * returns corresponding error code | |
82 | */ | |
83 | static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status) | |
84 | { | |
85 | switch (status) { | |
86 | case MEI_CL_CONN_SUCCESS: return 0; | |
87 | case MEI_CL_CONN_NOT_FOUND: return -ENOTTY; | |
88 | case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY; | |
89 | case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY; | |
90 | case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL; | |
91 | default: return -EINVAL; | |
92 | } | |
93 | } | |
94 | ||
84b3294a TW |
95 | /** |
96 | * mei_hbm_idle - set hbm to idle state | |
97 | * | |
98 | * @dev: the device structure | |
99 | */ | |
100 | void mei_hbm_idle(struct mei_device *dev) | |
101 | { | |
102 | dev->init_clients_timer = 0; | |
103 | dev->hbm_state = MEI_HBM_IDLE; | |
104 | } | |
105 | ||
106 | /** | |
25ca6472 | 107 | * mei_me_cl_remove_all - remove all me clients |
84b3294a TW |
108 | * |
109 | * @dev: the device structure | |
110 | */ | |
25ca6472 | 111 | static void mei_me_cl_remove_all(struct mei_device *dev) |
84b3294a | 112 | { |
5ca2d388 | 113 | struct mei_me_client *me_cl, *next; |
25ca6472 TW |
114 | list_for_each_entry_safe(me_cl, next, &dev->me_clients, list) { |
115 | list_del(&me_cl->list); | |
116 | kfree(me_cl); | |
117 | } | |
118 | } | |
5ca2d388 | 119 | |
25ca6472 TW |
120 | /** |
121 | * mei_hbm_reset - reset hbm counters and book keeping data structurs | |
122 | * | |
123 | * @dev: the device structure | |
124 | */ | |
125 | void mei_hbm_reset(struct mei_device *dev) | |
126 | { | |
84b3294a TW |
127 | dev->me_client_presentation_num = 0; |
128 | dev->me_client_index = 0; | |
129 | ||
25ca6472 | 130 | mei_me_cl_remove_all(dev); |
84b3294a TW |
131 | |
132 | mei_hbm_idle(dev); | |
133 | } | |
134 | ||
cd51ed64 TW |
135 | /** |
136 | * mei_hbm_cl_hdr - construct client hbm header | |
393b148f | 137 | * |
68d1aa65 | 138 | * @cl: client |
cd51ed64 TW |
139 | * @hbm_cmd: host bus message command |
140 | * @buf: buffer for cl header | |
141 | * @len: buffer length | |
142 | */ | |
143 | static inline | |
144 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) | |
145 | { | |
146 | struct mei_hbm_cl_cmd *cmd = buf; | |
147 | ||
148 | memset(cmd, 0, len); | |
149 | ||
150 | cmd->hbm_cmd = hbm_cmd; | |
151 | cmd->host_addr = cl->host_client_id; | |
152 | cmd->me_addr = cl->me_client_id; | |
153 | } | |
154 | ||
68d1aa65 TW |
155 | /** |
156 | * mei_hbm_cl_write - write simple hbm client message | |
157 | * | |
158 | * @dev: the device structure | |
159 | * @cl: client | |
160 | * @hbm_cmd: host bus message command | |
161 | * @len: buffer length | |
162 | */ | |
163 | static inline | |
164 | int mei_hbm_cl_write(struct mei_device *dev, | |
165 | struct mei_cl *cl, u8 hbm_cmd, size_t len) | |
166 | { | |
167 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
168 | ||
169 | mei_hbm_hdr(mei_hdr, len); | |
170 | mei_hbm_cl_hdr(cl, hbm_cmd, dev->wr_msg.data, len); | |
171 | ||
172 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
173 | } | |
174 | ||
cd51ed64 | 175 | /** |
2af89db1 TW |
176 | * mei_hbm_cl_addr_equal - check if the client's and |
177 | * the message address match | |
cd51ed64 | 178 | * |
2af89db1 TW |
179 | * @cl: client |
180 | * @cmd: hbm client message | |
cd51ed64 | 181 | * |
83ce0741 | 182 | * returns true if addresses are the same |
cd51ed64 TW |
183 | */ |
184 | static inline | |
2af89db1 | 185 | bool mei_hbm_cl_addr_equal(struct mei_cl *cl, struct mei_hbm_cl_cmd *cmd) |
cd51ed64 | 186 | { |
cd51ed64 TW |
187 | return cl->host_client_id == cmd->host_addr && |
188 | cl->me_client_id == cmd->me_addr; | |
189 | } | |
190 | ||
2af89db1 TW |
191 | /** |
192 | * mei_hbm_cl_find_by_cmd - find recipient client | |
193 | * | |
194 | * @dev: the device structure | |
195 | * @buf: a buffer with hbm cl command | |
196 | * | |
197 | * returns the recipient client or NULL if not found | |
198 | */ | |
199 | static inline | |
200 | struct mei_cl *mei_hbm_cl_find_by_cmd(struct mei_device *dev, void *buf) | |
201 | { | |
202 | struct mei_hbm_cl_cmd *cmd = (struct mei_hbm_cl_cmd *)buf; | |
203 | struct mei_cl *cl; | |
204 | ||
205 | list_for_each_entry(cl, &dev->file_list, link) | |
206 | if (mei_hbm_cl_addr_equal(cl, cmd)) | |
207 | return cl; | |
208 | return NULL; | |
209 | } | |
210 | ||
211 | ||
cb02efc3 AU |
212 | /** |
213 | * mei_hbm_start_wait - wait for start response message. | |
214 | * | |
215 | * @dev: the device structure | |
216 | * | |
217 | * returns 0 on success and < 0 on failure | |
218 | */ | |
9b0d5efc TW |
219 | int mei_hbm_start_wait(struct mei_device *dev) |
220 | { | |
221 | int ret; | |
cb02efc3 AU |
222 | |
223 | if (dev->hbm_state > MEI_HBM_STARTING) | |
9b0d5efc TW |
224 | return 0; |
225 | ||
226 | mutex_unlock(&dev->device_lock); | |
cb02efc3 AU |
227 | ret = wait_event_timeout(dev->wait_hbm_start, |
228 | dev->hbm_state != MEI_HBM_STARTING, | |
7d93e58d | 229 | mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); |
9b0d5efc TW |
230 | mutex_lock(&dev->device_lock); |
231 | ||
cb02efc3 | 232 | if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) { |
9b0d5efc | 233 | dev->hbm_state = MEI_HBM_IDLE; |
8b513d0c | 234 | dev_err(&dev->pdev->dev, "waiting for mei start failed\n"); |
7ca96aa2 | 235 | return -ETIME; |
9b0d5efc TW |
236 | } |
237 | return 0; | |
238 | } | |
239 | ||
bb1b0133 | 240 | /** |
8120e720 | 241 | * mei_hbm_start_req - sends start request message. |
bb1b0133 TW |
242 | * |
243 | * @dev: the device structure | |
544f9460 TW |
244 | * |
245 | * returns 0 on success and < 0 on failure | |
bb1b0133 | 246 | */ |
9b0d5efc | 247 | int mei_hbm_start_req(struct mei_device *dev) |
bb1b0133 | 248 | { |
e46f1874 | 249 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
250 | struct hbm_host_version_request *start_req; |
251 | const size_t len = sizeof(struct hbm_host_version_request); | |
544f9460 | 252 | int ret; |
bb1b0133 | 253 | |
5ca2d388 TW |
254 | mei_hbm_reset(dev); |
255 | ||
e46f1874 | 256 | mei_hbm_hdr(mei_hdr, len); |
bb1b0133 TW |
257 | |
258 | /* host start message */ | |
e46f1874 | 259 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
bb1b0133 TW |
260 | memset(start_req, 0, len); |
261 | start_req->hbm_cmd = HOST_START_REQ_CMD; | |
262 | start_req->host_version.major_version = HBM_MAJOR_VERSION; | |
263 | start_req->host_version.minor_version = HBM_MINOR_VERSION; | |
264 | ||
9b0d5efc | 265 | dev->hbm_state = MEI_HBM_IDLE; |
544f9460 TW |
266 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
267 | if (ret) { | |
268 | dev_err(&dev->pdev->dev, "version message write failed: ret = %d\n", | |
269 | ret); | |
270 | return ret; | |
bb1b0133 | 271 | } |
544f9460 | 272 | |
cb02efc3 | 273 | dev->hbm_state = MEI_HBM_STARTING; |
bb1b0133 | 274 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
9b0d5efc | 275 | return 0; |
bb1b0133 TW |
276 | } |
277 | ||
9b0d5efc | 278 | /* |
8120e720 | 279 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
bb1b0133 TW |
280 | * |
281 | * @dev: the device structure | |
282 | * | |
544f9460 | 283 | * returns 0 on success and < 0 on failure |
bb1b0133 | 284 | */ |
544f9460 | 285 | static int mei_hbm_enum_clients_req(struct mei_device *dev) |
bb1b0133 | 286 | { |
e46f1874 | 287 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
288 | struct hbm_host_enum_request *enum_req; |
289 | const size_t len = sizeof(struct hbm_host_enum_request); | |
544f9460 TW |
290 | int ret; |
291 | ||
bb1b0133 | 292 | /* enumerate clients */ |
e46f1874 | 293 | mei_hbm_hdr(mei_hdr, len); |
bb1b0133 | 294 | |
e46f1874 TW |
295 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
296 | memset(enum_req, 0, len); | |
bb1b0133 TW |
297 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
298 | ||
544f9460 TW |
299 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
300 | if (ret) { | |
301 | dev_err(&dev->pdev->dev, "enumeration request write failed: ret = %d.\n", | |
302 | ret); | |
303 | return ret; | |
bb1b0133 | 304 | } |
9b0d5efc | 305 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
bb1b0133 | 306 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
544f9460 | 307 | return 0; |
bb1b0133 TW |
308 | } |
309 | ||
5ca2d388 TW |
310 | /* |
311 | * mei_hbm_me_cl_add - add new me client to the list | |
312 | * | |
313 | * @dev: the device structure | |
314 | * @res: hbm property response | |
315 | * | |
316 | * returns 0 on success and -ENOMEM on allocation failure | |
317 | */ | |
318 | ||
319 | static int mei_hbm_me_cl_add(struct mei_device *dev, | |
320 | struct hbm_props_response *res) | |
321 | { | |
322 | struct mei_me_client *me_cl; | |
323 | ||
324 | me_cl = kzalloc(sizeof(struct mei_me_client), GFP_KERNEL); | |
325 | if (!me_cl) | |
326 | return -ENOMEM; | |
327 | ||
328 | me_cl->props = res->client_properties; | |
329 | me_cl->client_id = res->me_addr; | |
330 | me_cl->mei_flow_ctrl_creds = 0; | |
331 | ||
332 | list_add(&me_cl->list, &dev->me_clients); | |
333 | return 0; | |
334 | } | |
335 | ||
8120e720 | 336 | /** |
393b148f | 337 | * mei_hbm_prop_req - request property for a single client |
8120e720 TW |
338 | * |
339 | * @dev: the device structure | |
340 | * | |
544f9460 | 341 | * returns 0 on success and < 0 on failure |
8120e720 | 342 | */ |
bb1b0133 | 343 | |
8120e720 | 344 | static int mei_hbm_prop_req(struct mei_device *dev) |
bb1b0133 TW |
345 | { |
346 | ||
e46f1874 | 347 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
348 | struct hbm_props_request *prop_req; |
349 | const size_t len = sizeof(struct hbm_props_request); | |
350 | unsigned long next_client_index; | |
544f9460 | 351 | int ret; |
bb1b0133 | 352 | |
bb1b0133 TW |
353 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, |
354 | dev->me_client_index); | |
355 | ||
356 | /* We got all client properties */ | |
357 | if (next_client_index == MEI_CLIENTS_MAX) { | |
9b0d5efc | 358 | dev->hbm_state = MEI_HBM_STARTED; |
bb1b0133 TW |
359 | schedule_work(&dev->init_work); |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
e46f1874 TW |
364 | mei_hbm_hdr(mei_hdr, len); |
365 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; | |
bb1b0133 TW |
366 | |
367 | memset(prop_req, 0, sizeof(struct hbm_props_request)); | |
368 | ||
bb1b0133 | 369 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; |
3438c1f3 | 370 | prop_req->me_addr = next_client_index; |
bb1b0133 | 371 | |
544f9460 TW |
372 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
373 | if (ret) { | |
374 | dev_err(&dev->pdev->dev, "properties request write failed: ret = %d\n", | |
375 | ret); | |
376 | return ret; | |
bb1b0133 TW |
377 | } |
378 | ||
379 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; | |
380 | dev->me_client_index = next_client_index; | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
4fcbc99b TW |
385 | /* |
386 | * mei_hbm_pg - sends pg command | |
387 | * | |
388 | * @dev: the device structure | |
389 | * @pg_cmd: the pg command code | |
390 | * | |
bae1cc7d TW |
391 | * returns -EIO on write failure |
392 | * -EOPNOTSUPP if the operation is not supported by the protocol | |
4fcbc99b TW |
393 | */ |
394 | int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) | |
395 | { | |
396 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
397 | struct hbm_power_gate *req; | |
398 | const size_t len = sizeof(struct hbm_power_gate); | |
399 | int ret; | |
400 | ||
bae1cc7d TW |
401 | if (!dev->hbm_f_pg_supported) |
402 | return -EOPNOTSUPP; | |
403 | ||
4fcbc99b TW |
404 | mei_hbm_hdr(mei_hdr, len); |
405 | ||
406 | req = (struct hbm_power_gate *)dev->wr_msg.data; | |
407 | memset(req, 0, len); | |
408 | req->hbm_cmd = pg_cmd; | |
409 | ||
410 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
411 | if (ret) | |
412 | dev_err(&dev->pdev->dev, "power gate command write failed.\n"); | |
413 | return ret; | |
414 | } | |
415 | EXPORT_SYMBOL_GPL(mei_hbm_pg); | |
416 | ||
e46f1874 | 417 | /** |
6bb948c9 | 418 | * mei_hbm_stop_req - send stop request message |
e46f1874 TW |
419 | * |
420 | * @dev - mei device | |
6bb948c9 TW |
421 | * @cl: client info |
422 | * | |
423 | * This function returns -EIO on write failure | |
e46f1874 | 424 | */ |
6bb948c9 | 425 | static int mei_hbm_stop_req(struct mei_device *dev) |
e46f1874 | 426 | { |
6bb948c9 | 427 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
e46f1874 | 428 | struct hbm_host_stop_request *req = |
6bb948c9 | 429 | (struct hbm_host_stop_request *)dev->wr_msg.data; |
e46f1874 TW |
430 | const size_t len = sizeof(struct hbm_host_stop_request); |
431 | ||
432 | mei_hbm_hdr(mei_hdr, len); | |
433 | ||
434 | memset(req, 0, len); | |
435 | req->hbm_cmd = HOST_STOP_REQ_CMD; | |
436 | req->reason = DRIVER_STOP_REQUEST; | |
6bb948c9 TW |
437 | |
438 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
e46f1874 TW |
439 | } |
440 | ||
bb1b0133 | 441 | /** |
83ce0741 | 442 | * mei_hbm_cl_flow_control_req - sends flow control request. |
bb1b0133 TW |
443 | * |
444 | * @dev: the device structure | |
8120e720 | 445 | * @cl: client info |
bb1b0133 TW |
446 | * |
447 | * This function returns -EIO on write failure | |
448 | */ | |
8120e720 | 449 | int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 450 | { |
bb1b0133 | 451 | const size_t len = sizeof(struct hbm_flow_control); |
46922186 | 452 | cl_dbg(dev, cl, "sending flow control\n"); |
68d1aa65 | 453 | return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD, len); |
bb1b0133 TW |
454 | } |
455 | ||
6bbda15f | 456 | /** |
393b148f | 457 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
6bbda15f | 458 | * |
393b148f | 459 | * @dev: the device structure |
6bbda15f | 460 | * @flow: flow control. |
12d00665 AU |
461 | * |
462 | * return 0 on success, < 0 otherwise | |
6bbda15f | 463 | */ |
12d00665 | 464 | static int mei_hbm_add_single_flow_creds(struct mei_device *dev, |
6bbda15f TW |
465 | struct hbm_flow_control *flow) |
466 | { | |
12d00665 | 467 | struct mei_me_client *me_cl; |
12d00665 | 468 | |
d320832f TW |
469 | me_cl = mei_me_cl_by_id(dev, flow->me_addr); |
470 | if (!me_cl) { | |
12d00665 AU |
471 | dev_err(&dev->pdev->dev, "no such me client %d\n", |
472 | flow->me_addr); | |
d320832f | 473 | return -ENOENT; |
12d00665 AU |
474 | } |
475 | ||
d320832f TW |
476 | if (WARN_ON(me_cl->props.single_recv_buf == 0)) |
477 | return -EINVAL; | |
478 | ||
479 | me_cl->mei_flow_ctrl_creds++; | |
480 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n", | |
481 | flow->me_addr, me_cl->mei_flow_ctrl_creds); | |
12d00665 AU |
482 | |
483 | return 0; | |
6bbda15f TW |
484 | } |
485 | ||
486 | /** | |
487 | * mei_hbm_cl_flow_control_res - flow control response from me | |
488 | * | |
489 | * @dev: the device structure | |
490 | * @flow_control: flow control response bus message | |
491 | */ | |
492 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, | |
2af89db1 | 493 | struct hbm_flow_control *flow_control) |
6bbda15f | 494 | { |
31f88f57 | 495 | struct mei_cl *cl; |
6bbda15f TW |
496 | |
497 | if (!flow_control->host_addr) { | |
498 | /* single receive buffer */ | |
499 | mei_hbm_add_single_flow_creds(dev, flow_control); | |
500 | return; | |
501 | } | |
502 | ||
2af89db1 TW |
503 | cl = mei_hbm_cl_find_by_cmd(dev, flow_control); |
504 | if (cl) { | |
505 | cl->mei_flow_ctrl_creds++; | |
506 | cl_dbg(dev, cl, "flow control creds = %d.\n", | |
5ca2d388 | 507 | cl->mei_flow_ctrl_creds); |
6bbda15f TW |
508 | } |
509 | } | |
510 | ||
511 | ||
bb1b0133 | 512 | /** |
8120e720 | 513 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
bb1b0133 TW |
514 | * |
515 | * @dev: the device structure | |
8120e720 | 516 | * @cl: a client to disconnect from |
bb1b0133 TW |
517 | * |
518 | * This function returns -EIO on write failure | |
519 | */ | |
8120e720 | 520 | int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 521 | { |
bb1b0133 | 522 | const size_t len = sizeof(struct hbm_client_connect_request); |
68d1aa65 | 523 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD, len); |
bb1b0133 TW |
524 | } |
525 | ||
6bb948c9 TW |
526 | /** |
527 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW | |
528 | * | |
529 | * @dev: the device structure | |
530 | * @cl: a client to disconnect from | |
531 | * | |
532 | * This function returns -EIO on write failure | |
533 | */ | |
534 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) | |
535 | { | |
6bb948c9 | 536 | const size_t len = sizeof(struct hbm_client_connect_response); |
68d1aa65 | 537 | return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD, len); |
6bb948c9 TW |
538 | } |
539 | ||
6bbda15f | 540 | /** |
12f45ed4 TW |
541 | * mei_hbm_cl_disconnect_res - update the client state according |
542 | * disconnect response | |
6bbda15f | 543 | * |
12f45ed4 TW |
544 | * @cl: mei host client |
545 | * @cmd: disconnect client response host bus message | |
6bbda15f | 546 | */ |
12f45ed4 TW |
547 | static void mei_hbm_cl_disconnect_res(struct mei_cl *cl, |
548 | struct mei_hbm_cl_cmd *cmd) | |
6bbda15f | 549 | { |
12f45ed4 TW |
550 | struct hbm_client_connect_response *rs = |
551 | (struct hbm_client_connect_response *)cmd; | |
6bbda15f | 552 | |
12f45ed4 | 553 | dev_dbg(&cl->dev->pdev->dev, "hbm: disconnect response cl:host=%02d me=%02d status=%d\n", |
285e2996 | 554 | rs->me_addr, rs->host_addr, rs->status); |
6bbda15f | 555 | |
12f45ed4 TW |
556 | if (rs->status == MEI_CL_DISCONN_SUCCESS) |
557 | cl->state = MEI_FILE_DISCONNECTED; | |
558 | cl->status = 0; | |
6bbda15f TW |
559 | } |
560 | ||
bb1b0133 | 561 | /** |
8120e720 | 562 | * mei_hbm_cl_connect_req - send connection request to specific me client |
bb1b0133 TW |
563 | * |
564 | * @dev: the device structure | |
8120e720 | 565 | * @cl: a client to connect to |
bb1b0133 | 566 | * |
8120e720 | 567 | * returns -EIO on write failure |
bb1b0133 | 568 | */ |
8120e720 | 569 | int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 570 | { |
bb1b0133 | 571 | const size_t len = sizeof(struct hbm_client_connect_request); |
68d1aa65 | 572 | return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD, len); |
bb1b0133 TW |
573 | } |
574 | ||
6bbda15f | 575 | /** |
12f45ed4 TW |
576 | * mei_hbm_cl_connect_res - update the client state according |
577 | * connection response | |
6bbda15f | 578 | * |
12f45ed4 TW |
579 | * @cl: mei host client |
580 | * @cmd: connect client response host bus message | |
6bbda15f | 581 | */ |
12f45ed4 TW |
582 | static void mei_hbm_cl_connect_res(struct mei_cl *cl, |
583 | struct mei_hbm_cl_cmd *cmd) | |
6bbda15f | 584 | { |
12f45ed4 TW |
585 | struct hbm_client_connect_response *rs = |
586 | (struct hbm_client_connect_response *)cmd; | |
6bbda15f | 587 | |
12f45ed4 | 588 | dev_dbg(&cl->dev->pdev->dev, "hbm: connect response cl:host=%02d me=%02d status=%s\n", |
285e2996 AU |
589 | rs->me_addr, rs->host_addr, |
590 | mei_cl_conn_status_str(rs->status)); | |
6bbda15f | 591 | |
12f45ed4 TW |
592 | if (rs->status == MEI_CL_CONN_SUCCESS) |
593 | cl->state = MEI_FILE_CONNECTED; | |
594 | else | |
595 | cl->state = MEI_FILE_DISCONNECTED; | |
596 | cl->status = mei_cl_conn_status_to_errno(rs->status); | |
597 | } | |
598 | ||
599 | /** | |
600 | * mei_hbm_cl_res - process hbm response received on behalf | |
601 | * an client | |
602 | * | |
603 | * @dev: the device structure | |
604 | * @rs: hbm client message | |
605 | * @fop_type: file operation type | |
606 | */ | |
607 | static void mei_hbm_cl_res(struct mei_device *dev, | |
608 | struct mei_hbm_cl_cmd *rs, | |
609 | enum mei_cb_file_ops fop_type) | |
610 | { | |
611 | struct mei_cl *cl; | |
612 | struct mei_cl_cb *cb, *next; | |
6bbda15f | 613 | |
12f45ed4 | 614 | cl = NULL; |
64092858 | 615 | list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { |
6bbda15f | 616 | |
64092858 TW |
617 | cl = cb->cl; |
618 | /* this should not happen */ | |
619 | if (WARN_ON(!cl)) { | |
620 | list_del_init(&cb->list); | |
621 | continue; | |
622 | } | |
6bbda15f | 623 | |
12f45ed4 | 624 | if (cb->fop_type != fop_type) |
64092858 | 625 | continue; |
6bbda15f | 626 | |
64092858 TW |
627 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
628 | list_del(&cb->list); | |
629 | break; | |
6bbda15f TW |
630 | } |
631 | } | |
64092858 TW |
632 | |
633 | if (!cl) | |
634 | return; | |
635 | ||
12f45ed4 TW |
636 | switch (fop_type) { |
637 | case MEI_FOP_CONNECT: | |
638 | mei_hbm_cl_connect_res(cl, rs); | |
639 | break; | |
640 | case MEI_FOP_DISCONNECT: | |
641 | mei_hbm_cl_disconnect_res(cl, rs); | |
642 | break; | |
643 | default: | |
644 | return; | |
645 | } | |
646 | ||
64092858 | 647 | cl->timer_count = 0; |
12f45ed4 | 648 | wake_up(&cl->wait); |
6bbda15f TW |
649 | } |
650 | ||
651 | ||
bb1b0133 | 652 | /** |
83ce0741 AU |
653 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
654 | * host sends disconnect response | |
bb1b0133 TW |
655 | * |
656 | * @dev: the device structure. | |
8120e720 | 657 | * @disconnect_req: disconnect request bus message from the me |
6bb948c9 TW |
658 | * |
659 | * returns -ENOMEM on allocation failure | |
bb1b0133 | 660 | */ |
6bb948c9 | 661 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
bb1b0133 TW |
662 | struct hbm_client_connect_request *disconnect_req) |
663 | { | |
31f88f57 | 664 | struct mei_cl *cl; |
6bb948c9 | 665 | struct mei_cl_cb *cb; |
bb1b0133 | 666 | |
2af89db1 TW |
667 | cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req); |
668 | if (cl) { | |
669 | cl_dbg(dev, cl, "disconnect request received\n"); | |
670 | cl->state = MEI_FILE_DISCONNECTED; | |
671 | cl->timer_count = 0; | |
672 | ||
673 | cb = mei_io_cb_init(cl, NULL); | |
674 | if (!cb) | |
675 | return -ENOMEM; | |
676 | cb->fop_type = MEI_FOP_DISCONNECT_RSP; | |
677 | cl_dbg(dev, cl, "add disconnect response as first\n"); | |
678 | list_add(&cb->list, &dev->ctrl_wr_list.list); | |
bb1b0133 | 679 | } |
6bb948c9 | 680 | return 0; |
bb1b0133 TW |
681 | } |
682 | ||
bae1cc7d TW |
683 | /** |
684 | * mei_hbm_config_features: check what hbm features and commands | |
685 | * are supported by the fw | |
686 | * | |
687 | * @dev: the device structure | |
688 | */ | |
689 | static void mei_hbm_config_features(struct mei_device *dev) | |
690 | { | |
691 | /* Power Gating Isolation Support */ | |
692 | dev->hbm_f_pg_supported = 0; | |
693 | if (dev->version.major_version > HBM_MAJOR_VERSION_PGI) | |
694 | dev->hbm_f_pg_supported = 1; | |
695 | ||
696 | if (dev->version.major_version == HBM_MAJOR_VERSION_PGI && | |
697 | dev->version.minor_version >= HBM_MINOR_VERSION_PGI) | |
698 | dev->hbm_f_pg_supported = 1; | |
699 | } | |
bb1b0133 | 700 | |
2c9b48ac TW |
701 | /** |
702 | * mei_hbm_version_is_supported - checks whether the driver can | |
703 | * support the hbm version of the device | |
704 | * | |
705 | * @dev: the device structure | |
706 | * returns true if driver can support hbm version of the device | |
707 | */ | |
708 | bool mei_hbm_version_is_supported(struct mei_device *dev) | |
709 | { | |
710 | return (dev->version.major_version < HBM_MAJOR_VERSION) || | |
711 | (dev->version.major_version == HBM_MAJOR_VERSION && | |
712 | dev->version.minor_version <= HBM_MINOR_VERSION); | |
713 | } | |
714 | ||
bb1b0133 TW |
715 | /** |
716 | * mei_hbm_dispatch - bottom half read routine after ISR to | |
717 | * handle the read bus message cmd processing. | |
718 | * | |
719 | * @dev: the device structure | |
720 | * @mei_hdr: header of bus message | |
544f9460 TW |
721 | * |
722 | * returns 0 on success and < 0 on failure | |
bb1b0133 | 723 | */ |
544f9460 | 724 | int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) |
bb1b0133 TW |
725 | { |
726 | struct mei_bus_message *mei_msg; | |
bb1b0133 | 727 | struct hbm_host_version_response *version_res; |
bb1b0133 TW |
728 | struct hbm_props_response *props_res; |
729 | struct hbm_host_enum_response *enum_res; | |
bb1b0133 | 730 | |
12f45ed4 TW |
731 | struct mei_hbm_cl_cmd *cl_cmd; |
732 | struct hbm_client_connect_request *disconnect_req; | |
733 | struct hbm_flow_control *flow_control; | |
734 | ||
bb1b0133 TW |
735 | /* read the message to our buffer */ |
736 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); | |
737 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); | |
738 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; | |
12f45ed4 | 739 | cl_cmd = (struct mei_hbm_cl_cmd *)mei_msg; |
bb1b0133 | 740 | |
66ae460b TW |
741 | /* ignore spurious message and prevent reset nesting |
742 | * hbm is put to idle during system reset | |
743 | */ | |
744 | if (dev->hbm_state == MEI_HBM_IDLE) { | |
745 | dev_dbg(&dev->pdev->dev, "hbm: state is idle ignore spurious messages\n"); | |
746 | return 0; | |
747 | } | |
748 | ||
bb1b0133 TW |
749 | switch (mei_msg->hbm_cmd) { |
750 | case HOST_START_RES_CMD: | |
544f9460 TW |
751 | dev_dbg(&dev->pdev->dev, "hbm: start: response message received.\n"); |
752 | ||
753 | dev->init_clients_timer = 0; | |
754 | ||
bb1b0133 | 755 | version_res = (struct hbm_host_version_response *)mei_msg; |
2c9b48ac TW |
756 | |
757 | dev_dbg(&dev->pdev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", | |
758 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, | |
759 | version_res->me_max_version.major_version, | |
760 | version_res->me_max_version.minor_version); | |
761 | ||
762 | if (version_res->host_version_supported) { | |
763 | dev->version.major_version = HBM_MAJOR_VERSION; | |
764 | dev->version.minor_version = HBM_MINOR_VERSION; | |
765 | } else { | |
766 | dev->version.major_version = | |
767 | version_res->me_max_version.major_version; | |
768 | dev->version.minor_version = | |
769 | version_res->me_max_version.minor_version; | |
770 | } | |
771 | ||
772 | if (!mei_hbm_version_is_supported(dev)) { | |
544f9460 | 773 | dev_warn(&dev->pdev->dev, "hbm: start: version mismatch - stopping the driver.\n"); |
bb1b0133 | 774 | |
544f9460 | 775 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 776 | if (mei_hbm_stop_req(dev)) { |
544f9460 TW |
777 | dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); |
778 | return -EIO; | |
779 | } | |
780 | break; | |
781 | } | |
9b0d5efc | 782 | |
bae1cc7d TW |
783 | mei_hbm_config_features(dev); |
784 | ||
544f9460 | 785 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
cb02efc3 | 786 | dev->hbm_state != MEI_HBM_STARTING) { |
544f9460 TW |
787 | dev_err(&dev->pdev->dev, "hbm: start: state mismatch, [%d, %d]\n", |
788 | dev->dev_state, dev->hbm_state); | |
789 | return -EPROTO; | |
e46f1874 | 790 | } |
bb1b0133 | 791 | |
544f9460 TW |
792 | dev->hbm_state = MEI_HBM_STARTED; |
793 | ||
794 | if (mei_hbm_enum_clients_req(dev)) { | |
795 | dev_err(&dev->pdev->dev, "hbm: start: failed to send enumeration request\n"); | |
796 | return -EIO; | |
bb1b0133 TW |
797 | } |
798 | ||
cb02efc3 | 799 | wake_up(&dev->wait_hbm_start); |
bb1b0133 TW |
800 | break; |
801 | ||
802 | case CLIENT_CONNECT_RES_CMD: | |
544f9460 | 803 | dev_dbg(&dev->pdev->dev, "hbm: client connect response: message received.\n"); |
12f45ed4 | 804 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT); |
bb1b0133 TW |
805 | break; |
806 | ||
807 | case CLIENT_DISCONNECT_RES_CMD: | |
544f9460 | 808 | dev_dbg(&dev->pdev->dev, "hbm: client disconnect response: message received.\n"); |
12f45ed4 | 809 | mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT); |
bb1b0133 TW |
810 | break; |
811 | ||
812 | case MEI_FLOW_CONTROL_CMD: | |
544f9460 TW |
813 | dev_dbg(&dev->pdev->dev, "hbm: client flow control response: message received.\n"); |
814 | ||
bb1b0133 | 815 | flow_control = (struct hbm_flow_control *) mei_msg; |
6bbda15f | 816 | mei_hbm_cl_flow_control_res(dev, flow_control); |
bb1b0133 TW |
817 | break; |
818 | ||
4fcbc99b TW |
819 | case MEI_PG_ISOLATION_ENTRY_RES_CMD: |
820 | dev_dbg(&dev->pdev->dev, "power gate isolation entry response received\n"); | |
ba9cdd0e | 821 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
4fcbc99b TW |
822 | if (waitqueue_active(&dev->wait_pg)) |
823 | wake_up(&dev->wait_pg); | |
824 | break; | |
825 | ||
826 | case MEI_PG_ISOLATION_EXIT_REQ_CMD: | |
827 | dev_dbg(&dev->pdev->dev, "power gate isolation exit request received\n"); | |
ba9cdd0e | 828 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
4fcbc99b TW |
829 | if (waitqueue_active(&dev->wait_pg)) |
830 | wake_up(&dev->wait_pg); | |
180ea05b TW |
831 | else |
832 | /* | |
833 | * If the driver is not waiting on this then | |
834 | * this is HW initiated exit from PG. | |
835 | * Start runtime pm resume sequence to exit from PG. | |
836 | */ | |
837 | pm_request_resume(&dev->pdev->dev); | |
4fcbc99b TW |
838 | break; |
839 | ||
bb1b0133 | 840 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
544f9460 TW |
841 | dev_dbg(&dev->pdev->dev, "hbm: properties response: message received.\n"); |
842 | ||
843 | dev->init_clients_timer = 0; | |
844 | ||
5ca2d388 TW |
845 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
846 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { | |
847 | dev_err(&dev->pdev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", | |
848 | dev->dev_state, dev->hbm_state); | |
544f9460 TW |
849 | return -EPROTO; |
850 | } | |
851 | ||
bb1b0133 | 852 | props_res = (struct hbm_props_response *)mei_msg; |
bb1b0133 | 853 | |
544f9460 | 854 | if (props_res->status) { |
89778d6e TW |
855 | dev_err(&dev->pdev->dev, "hbm: properties response: wrong status = %d %s\n", |
856 | props_res->status, | |
857 | mei_hbm_status_str(props_res->status)); | |
544f9460 | 858 | return -EPROTO; |
bb1b0133 TW |
859 | } |
860 | ||
5ca2d388 | 861 | mei_hbm_me_cl_add(dev, props_res); |
bb1b0133 | 862 | |
bb1b0133 TW |
863 | dev->me_client_index++; |
864 | dev->me_client_presentation_num++; | |
865 | ||
8120e720 | 866 | /* request property for the next client */ |
544f9460 TW |
867 | if (mei_hbm_prop_req(dev)) |
868 | return -EIO; | |
bb1b0133 TW |
869 | |
870 | break; | |
871 | ||
872 | case HOST_ENUM_RES_CMD: | |
544f9460 TW |
873 | dev_dbg(&dev->pdev->dev, "hbm: enumeration response: message received\n"); |
874 | ||
875 | dev->init_clients_timer = 0; | |
876 | ||
bb1b0133 | 877 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
23f5a322 TW |
878 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
879 | < sizeof(enum_res->valid_addresses)); | |
880 | memcpy(dev->me_clients_map, enum_res->valid_addresses, | |
5ca2d388 | 881 | sizeof(enum_res->valid_addresses)); |
544f9460 TW |
882 | |
883 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || | |
884 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { | |
885 | dev_err(&dev->pdev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", | |
886 | dev->dev_state, dev->hbm_state); | |
887 | return -EPROTO; | |
bb1b0133 | 888 | } |
544f9460 | 889 | |
544f9460 TW |
890 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; |
891 | ||
892 | /* first property request */ | |
893 | if (mei_hbm_prop_req(dev)) | |
894 | return -EIO; | |
895 | ||
bb1b0133 TW |
896 | break; |
897 | ||
898 | case HOST_STOP_RES_CMD: | |
544f9460 TW |
899 | dev_dbg(&dev->pdev->dev, "hbm: stop response: message received\n"); |
900 | ||
901 | dev->init_clients_timer = 0; | |
902 | ||
903 | if (dev->hbm_state != MEI_HBM_STOPPED) { | |
904 | dev_err(&dev->pdev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", | |
905 | dev->dev_state, dev->hbm_state); | |
906 | return -EPROTO; | |
907 | } | |
9b0d5efc | 908 | |
33ec0826 | 909 | dev->dev_state = MEI_DEV_POWER_DOWN; |
544f9460 TW |
910 | dev_info(&dev->pdev->dev, "hbm: stop response: resetting.\n"); |
911 | /* force the reset */ | |
912 | return -EPROTO; | |
bb1b0133 TW |
913 | break; |
914 | ||
915 | case CLIENT_DISCONNECT_REQ_CMD: | |
544f9460 TW |
916 | dev_dbg(&dev->pdev->dev, "hbm: disconnect request: message received\n"); |
917 | ||
bb1b0133 | 918 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
8120e720 | 919 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
bb1b0133 TW |
920 | break; |
921 | ||
922 | case ME_STOP_REQ_CMD: | |
544f9460 | 923 | dev_dbg(&dev->pdev->dev, "hbm: stop request: message received\n"); |
544f9460 | 924 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 925 | if (mei_hbm_stop_req(dev)) { |
cb02efc3 | 926 | dev_err(&dev->pdev->dev, "hbm: stop request: failed to send stop request\n"); |
6bb948c9 TW |
927 | return -EIO; |
928 | } | |
bb1b0133 | 929 | break; |
bb1b0133 TW |
930 | default: |
931 | BUG(); | |
932 | break; | |
933 | ||
934 | } | |
544f9460 | 935 | return 0; |
bb1b0133 TW |
936 | } |
937 |