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 | |
285e2996 AU |
28 | static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status) |
29 | { | |
30 | #define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status | |
31 | switch (status) { | |
32 | MEI_CL_CS(SUCCESS); | |
33 | MEI_CL_CS(NOT_FOUND); | |
34 | MEI_CL_CS(ALREADY_STARTED); | |
35 | MEI_CL_CS(OUT_OF_RESOURCES); | |
36 | MEI_CL_CS(MESSAGE_SMALL); | |
37 | default: return "unknown"; | |
38 | } | |
39 | #undef MEI_CL_CCS | |
40 | } | |
41 | ||
42 | /** | |
43 | * mei_cl_conn_status_to_errno - convert client connect response | |
44 | * status to error code | |
45 | * | |
46 | * @status: client connect response status | |
47 | * | |
48 | * returns corresponding error code | |
49 | */ | |
50 | static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status) | |
51 | { | |
52 | switch (status) { | |
53 | case MEI_CL_CONN_SUCCESS: return 0; | |
54 | case MEI_CL_CONN_NOT_FOUND: return -ENOTTY; | |
55 | case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY; | |
56 | case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY; | |
57 | case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL; | |
58 | default: return -EINVAL; | |
59 | } | |
60 | } | |
61 | ||
a40b260d TW |
62 | /** |
63 | * mei_hbm_me_cl_allocate - allocates storage for me clients | |
64 | * | |
65 | * @dev: the device structure | |
66 | * | |
544f9460 | 67 | * returns 0 on success -ENOMEM on allocation failure |
a40b260d | 68 | */ |
544f9460 | 69 | static int mei_hbm_me_cl_allocate(struct mei_device *dev) |
a40b260d TW |
70 | { |
71 | struct mei_me_client *clients; | |
72 | int b; | |
73 | ||
1aee351a TW |
74 | dev->me_clients_num = 0; |
75 | dev->me_client_presentation_num = 0; | |
76 | dev->me_client_index = 0; | |
77 | ||
a40b260d TW |
78 | /* count how many ME clients we have */ |
79 | for_each_set_bit(b, dev->me_clients_map, MEI_CLIENTS_MAX) | |
80 | dev->me_clients_num++; | |
81 | ||
1aee351a | 82 | if (dev->me_clients_num == 0) |
544f9460 | 83 | return 0; |
a40b260d TW |
84 | |
85 | kfree(dev->me_clients); | |
86 | dev->me_clients = NULL; | |
87 | ||
e19555ce | 88 | dev_dbg(&dev->pdev->dev, "memory allocation for ME clients size=%ld.\n", |
a40b260d TW |
89 | dev->me_clients_num * sizeof(struct mei_me_client)); |
90 | /* allocate storage for ME clients representation */ | |
91 | clients = kcalloc(dev->me_clients_num, | |
92 | sizeof(struct mei_me_client), GFP_KERNEL); | |
93 | if (!clients) { | |
94 | dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n"); | |
544f9460 | 95 | return -ENOMEM; |
a40b260d TW |
96 | } |
97 | dev->me_clients = clients; | |
544f9460 | 98 | return 0; |
a40b260d TW |
99 | } |
100 | ||
cd51ed64 TW |
101 | /** |
102 | * mei_hbm_cl_hdr - construct client hbm header | |
393b148f | 103 | * |
cd51ed64 TW |
104 | * @cl: - client |
105 | * @hbm_cmd: host bus message command | |
106 | * @buf: buffer for cl header | |
107 | * @len: buffer length | |
108 | */ | |
109 | static inline | |
110 | void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) | |
111 | { | |
112 | struct mei_hbm_cl_cmd *cmd = buf; | |
113 | ||
114 | memset(cmd, 0, len); | |
115 | ||
116 | cmd->hbm_cmd = hbm_cmd; | |
117 | cmd->host_addr = cl->host_client_id; | |
118 | cmd->me_addr = cl->me_client_id; | |
119 | } | |
120 | ||
121 | /** | |
83ce0741 | 122 | * mei_hbm_cl_addr_equal - tells if they have the same address |
cd51ed64 | 123 | * |
83ce0741 AU |
124 | * @cl: - client |
125 | * @buf: buffer with cl header | |
cd51ed64 | 126 | * |
83ce0741 | 127 | * returns true if addresses are the same |
cd51ed64 TW |
128 | */ |
129 | static inline | |
130 | bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf) | |
131 | { | |
132 | struct mei_hbm_cl_cmd *cmd = buf; | |
133 | return cl->host_client_id == cmd->host_addr && | |
134 | cl->me_client_id == cmd->me_addr; | |
135 | } | |
136 | ||
137 | ||
66ae460b TW |
138 | /** |
139 | * mei_hbm_idle - set hbm to idle state | |
140 | * | |
141 | * @dev: the device structure | |
142 | */ | |
143 | void mei_hbm_idle(struct mei_device *dev) | |
144 | { | |
145 | dev->init_clients_timer = 0; | |
146 | dev->hbm_state = MEI_HBM_IDLE; | |
147 | } | |
148 | ||
9b0d5efc TW |
149 | int mei_hbm_start_wait(struct mei_device *dev) |
150 | { | |
151 | int ret; | |
152 | if (dev->hbm_state > MEI_HBM_START) | |
153 | return 0; | |
154 | ||
155 | mutex_unlock(&dev->device_lock); | |
156 | ret = wait_event_interruptible_timeout(dev->wait_recvd_msg, | |
157 | dev->hbm_state == MEI_HBM_IDLE || | |
544f9460 | 158 | dev->hbm_state >= MEI_HBM_STARTED, |
7d93e58d | 159 | mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); |
9b0d5efc TW |
160 | mutex_lock(&dev->device_lock); |
161 | ||
162 | if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) { | |
163 | dev->hbm_state = MEI_HBM_IDLE; | |
8b513d0c | 164 | dev_err(&dev->pdev->dev, "waiting for mei start failed\n"); |
7ca96aa2 | 165 | return -ETIME; |
9b0d5efc TW |
166 | } |
167 | return 0; | |
168 | } | |
169 | ||
bb1b0133 | 170 | /** |
8120e720 | 171 | * mei_hbm_start_req - sends start request message. |
bb1b0133 TW |
172 | * |
173 | * @dev: the device structure | |
544f9460 TW |
174 | * |
175 | * returns 0 on success and < 0 on failure | |
bb1b0133 | 176 | */ |
9b0d5efc | 177 | int mei_hbm_start_req(struct mei_device *dev) |
bb1b0133 | 178 | { |
e46f1874 | 179 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
180 | struct hbm_host_version_request *start_req; |
181 | const size_t len = sizeof(struct hbm_host_version_request); | |
544f9460 | 182 | int ret; |
bb1b0133 | 183 | |
e46f1874 | 184 | mei_hbm_hdr(mei_hdr, len); |
bb1b0133 TW |
185 | |
186 | /* host start message */ | |
e46f1874 | 187 | start_req = (struct hbm_host_version_request *)dev->wr_msg.data; |
bb1b0133 TW |
188 | memset(start_req, 0, len); |
189 | start_req->hbm_cmd = HOST_START_REQ_CMD; | |
190 | start_req->host_version.major_version = HBM_MAJOR_VERSION; | |
191 | start_req->host_version.minor_version = HBM_MINOR_VERSION; | |
192 | ||
9b0d5efc | 193 | dev->hbm_state = MEI_HBM_IDLE; |
544f9460 TW |
194 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
195 | if (ret) { | |
196 | dev_err(&dev->pdev->dev, "version message write failed: ret = %d\n", | |
197 | ret); | |
198 | return ret; | |
bb1b0133 | 199 | } |
544f9460 | 200 | |
9b0d5efc | 201 | dev->hbm_state = MEI_HBM_START; |
bb1b0133 | 202 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
9b0d5efc | 203 | return 0; |
bb1b0133 TW |
204 | } |
205 | ||
9b0d5efc | 206 | /* |
8120e720 | 207 | * mei_hbm_enum_clients_req - sends enumeration client request message. |
bb1b0133 TW |
208 | * |
209 | * @dev: the device structure | |
210 | * | |
544f9460 | 211 | * returns 0 on success and < 0 on failure |
bb1b0133 | 212 | */ |
544f9460 | 213 | static int mei_hbm_enum_clients_req(struct mei_device *dev) |
bb1b0133 | 214 | { |
e46f1874 | 215 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
216 | struct hbm_host_enum_request *enum_req; |
217 | const size_t len = sizeof(struct hbm_host_enum_request); | |
544f9460 TW |
218 | int ret; |
219 | ||
bb1b0133 | 220 | /* enumerate clients */ |
e46f1874 | 221 | mei_hbm_hdr(mei_hdr, len); |
bb1b0133 | 222 | |
e46f1874 TW |
223 | enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data; |
224 | memset(enum_req, 0, len); | |
bb1b0133 TW |
225 | enum_req->hbm_cmd = HOST_ENUM_REQ_CMD; |
226 | ||
544f9460 TW |
227 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
228 | if (ret) { | |
229 | dev_err(&dev->pdev->dev, "enumeration request write failed: ret = %d.\n", | |
230 | ret); | |
231 | return ret; | |
bb1b0133 | 232 | } |
9b0d5efc | 233 | dev->hbm_state = MEI_HBM_ENUM_CLIENTS; |
bb1b0133 | 234 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; |
544f9460 | 235 | return 0; |
bb1b0133 TW |
236 | } |
237 | ||
8120e720 | 238 | /** |
393b148f | 239 | * mei_hbm_prop_req - request property for a single client |
8120e720 TW |
240 | * |
241 | * @dev: the device structure | |
242 | * | |
544f9460 | 243 | * returns 0 on success and < 0 on failure |
8120e720 | 244 | */ |
bb1b0133 | 245 | |
8120e720 | 246 | static int mei_hbm_prop_req(struct mei_device *dev) |
bb1b0133 TW |
247 | { |
248 | ||
e46f1874 | 249 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
250 | struct hbm_props_request *prop_req; |
251 | const size_t len = sizeof(struct hbm_props_request); | |
252 | unsigned long next_client_index; | |
1aee351a | 253 | unsigned long client_num; |
544f9460 | 254 | int ret; |
bb1b0133 TW |
255 | |
256 | client_num = dev->me_client_presentation_num; | |
257 | ||
258 | next_client_index = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, | |
259 | dev->me_client_index); | |
260 | ||
261 | /* We got all client properties */ | |
262 | if (next_client_index == MEI_CLIENTS_MAX) { | |
9b0d5efc | 263 | dev->hbm_state = MEI_HBM_STARTED; |
bb1b0133 TW |
264 | schedule_work(&dev->init_work); |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | dev->me_clients[client_num].client_id = next_client_index; | |
270 | dev->me_clients[client_num].mei_flow_ctrl_creds = 0; | |
271 | ||
e46f1874 TW |
272 | mei_hbm_hdr(mei_hdr, len); |
273 | prop_req = (struct hbm_props_request *)dev->wr_msg.data; | |
bb1b0133 TW |
274 | |
275 | memset(prop_req, 0, sizeof(struct hbm_props_request)); | |
276 | ||
277 | ||
278 | prop_req->hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD; | |
279 | prop_req->address = next_client_index; | |
280 | ||
544f9460 TW |
281 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
282 | if (ret) { | |
283 | dev_err(&dev->pdev->dev, "properties request write failed: ret = %d\n", | |
284 | ret); | |
285 | return ret; | |
bb1b0133 TW |
286 | } |
287 | ||
288 | dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT; | |
289 | dev->me_client_index = next_client_index; | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
4fcbc99b TW |
294 | /* |
295 | * mei_hbm_pg - sends pg command | |
296 | * | |
297 | * @dev: the device structure | |
298 | * @pg_cmd: the pg command code | |
299 | * | |
300 | * This function returns -EIO on write failure | |
301 | */ | |
302 | int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd) | |
303 | { | |
304 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
305 | struct hbm_power_gate *req; | |
306 | const size_t len = sizeof(struct hbm_power_gate); | |
307 | int ret; | |
308 | ||
309 | mei_hbm_hdr(mei_hdr, len); | |
310 | ||
311 | req = (struct hbm_power_gate *)dev->wr_msg.data; | |
312 | memset(req, 0, len); | |
313 | req->hbm_cmd = pg_cmd; | |
314 | ||
315 | ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
316 | if (ret) | |
317 | dev_err(&dev->pdev->dev, "power gate command write failed.\n"); | |
318 | return ret; | |
319 | } | |
320 | EXPORT_SYMBOL_GPL(mei_hbm_pg); | |
321 | ||
e46f1874 | 322 | /** |
6bb948c9 | 323 | * mei_hbm_stop_req - send stop request message |
e46f1874 TW |
324 | * |
325 | * @dev - mei device | |
6bb948c9 TW |
326 | * @cl: client info |
327 | * | |
328 | * This function returns -EIO on write failure | |
e46f1874 | 329 | */ |
6bb948c9 | 330 | static int mei_hbm_stop_req(struct mei_device *dev) |
e46f1874 | 331 | { |
6bb948c9 | 332 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
e46f1874 | 333 | struct hbm_host_stop_request *req = |
6bb948c9 | 334 | (struct hbm_host_stop_request *)dev->wr_msg.data; |
e46f1874 TW |
335 | const size_t len = sizeof(struct hbm_host_stop_request); |
336 | ||
337 | mei_hbm_hdr(mei_hdr, len); | |
338 | ||
339 | memset(req, 0, len); | |
340 | req->hbm_cmd = HOST_STOP_REQ_CMD; | |
341 | req->reason = DRIVER_STOP_REQUEST; | |
6bb948c9 TW |
342 | |
343 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
e46f1874 TW |
344 | } |
345 | ||
bb1b0133 | 346 | /** |
83ce0741 | 347 | * mei_hbm_cl_flow_control_req - sends flow control request. |
bb1b0133 TW |
348 | * |
349 | * @dev: the device structure | |
8120e720 | 350 | * @cl: client info |
bb1b0133 TW |
351 | * |
352 | * This function returns -EIO on write failure | |
353 | */ | |
8120e720 | 354 | int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 355 | { |
e46f1874 | 356 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
357 | const size_t len = sizeof(struct hbm_flow_control); |
358 | ||
e46f1874 TW |
359 | mei_hbm_hdr(mei_hdr, len); |
360 | mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len); | |
bb1b0133 | 361 | |
46922186 | 362 | cl_dbg(dev, cl, "sending flow control\n"); |
bb1b0133 | 363 | |
e46f1874 | 364 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
bb1b0133 TW |
365 | } |
366 | ||
6bbda15f | 367 | /** |
393b148f | 368 | * mei_hbm_add_single_flow_creds - adds single buffer credentials. |
6bbda15f | 369 | * |
393b148f | 370 | * @dev: the device structure |
6bbda15f | 371 | * @flow: flow control. |
12d00665 AU |
372 | * |
373 | * return 0 on success, < 0 otherwise | |
6bbda15f | 374 | */ |
12d00665 | 375 | static int mei_hbm_add_single_flow_creds(struct mei_device *dev, |
6bbda15f TW |
376 | struct hbm_flow_control *flow) |
377 | { | |
12d00665 AU |
378 | struct mei_me_client *me_cl; |
379 | int id; | |
380 | ||
381 | id = mei_me_cl_by_id(dev, flow->me_addr); | |
382 | if (id < 0) { | |
383 | dev_err(&dev->pdev->dev, "no such me client %d\n", | |
384 | flow->me_addr); | |
385 | return id; | |
386 | } | |
387 | ||
388 | me_cl = &dev->me_clients[id]; | |
389 | if (me_cl->props.single_recv_buf) { | |
390 | me_cl->mei_flow_ctrl_creds++; | |
391 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", | |
392 | flow->me_addr); | |
393 | dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", | |
394 | me_cl->mei_flow_ctrl_creds); | |
395 | } else { | |
396 | BUG(); /* error in flow control */ | |
6bbda15f | 397 | } |
12d00665 AU |
398 | |
399 | return 0; | |
6bbda15f TW |
400 | } |
401 | ||
402 | /** | |
403 | * mei_hbm_cl_flow_control_res - flow control response from me | |
404 | * | |
405 | * @dev: the device structure | |
406 | * @flow_control: flow control response bus message | |
407 | */ | |
408 | static void mei_hbm_cl_flow_control_res(struct mei_device *dev, | |
409 | struct hbm_flow_control *flow_control) | |
410 | { | |
31f88f57 | 411 | struct mei_cl *cl; |
6bbda15f TW |
412 | |
413 | if (!flow_control->host_addr) { | |
414 | /* single receive buffer */ | |
415 | mei_hbm_add_single_flow_creds(dev, flow_control); | |
416 | return; | |
417 | } | |
418 | ||
419 | /* normal connection */ | |
31f88f57 | 420 | list_for_each_entry(cl, &dev->file_list, link) { |
6bbda15f TW |
421 | if (mei_hbm_cl_addr_equal(cl, flow_control)) { |
422 | cl->mei_flow_ctrl_creds++; | |
423 | dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", | |
424 | flow_control->host_addr, flow_control->me_addr); | |
425 | dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", | |
426 | cl->mei_flow_ctrl_creds); | |
427 | break; | |
428 | } | |
429 | } | |
430 | } | |
431 | ||
432 | ||
bb1b0133 | 433 | /** |
8120e720 | 434 | * mei_hbm_cl_disconnect_req - sends disconnect message to fw. |
bb1b0133 TW |
435 | * |
436 | * @dev: the device structure | |
8120e720 | 437 | * @cl: a client to disconnect from |
bb1b0133 TW |
438 | * |
439 | * This function returns -EIO on write failure | |
440 | */ | |
8120e720 | 441 | int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 442 | { |
e46f1874 | 443 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
444 | const size_t len = sizeof(struct hbm_client_connect_request); |
445 | ||
e46f1874 TW |
446 | mei_hbm_hdr(mei_hdr, len); |
447 | mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_REQ_CMD, dev->wr_msg.data, len); | |
bb1b0133 | 448 | |
e46f1874 | 449 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
bb1b0133 TW |
450 | } |
451 | ||
6bb948c9 TW |
452 | /** |
453 | * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW | |
454 | * | |
455 | * @dev: the device structure | |
456 | * @cl: a client to disconnect from | |
457 | * | |
458 | * This function returns -EIO on write failure | |
459 | */ | |
460 | int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) | |
461 | { | |
462 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; | |
463 | const size_t len = sizeof(struct hbm_client_connect_response); | |
464 | ||
465 | mei_hbm_hdr(mei_hdr, len); | |
466 | mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, dev->wr_msg.data, len); | |
467 | ||
468 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); | |
469 | } | |
470 | ||
6bbda15f TW |
471 | /** |
472 | * mei_hbm_cl_disconnect_res - disconnect response from ME | |
473 | * | |
474 | * @dev: the device structure | |
475 | * @rs: disconnect response bus message | |
476 | */ | |
477 | static void mei_hbm_cl_disconnect_res(struct mei_device *dev, | |
478 | struct hbm_client_connect_response *rs) | |
479 | { | |
480 | struct mei_cl *cl; | |
64092858 | 481 | struct mei_cl_cb *cb, *next; |
6bbda15f | 482 | |
285e2996 AU |
483 | dev_dbg(&dev->pdev->dev, "hbm: disconnect response cl:host=%02d me=%02d status=%d\n", |
484 | rs->me_addr, rs->host_addr, rs->status); | |
6bbda15f | 485 | |
64092858 TW |
486 | list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { |
487 | cl = cb->cl; | |
6bbda15f | 488 | |
64092858 TW |
489 | /* this should not happen */ |
490 | if (WARN_ON(!cl)) { | |
491 | list_del(&cb->list); | |
6bbda15f TW |
492 | return; |
493 | } | |
494 | ||
6bbda15f | 495 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
64092858 | 496 | list_del(&cb->list); |
285e2996 | 497 | if (rs->status == MEI_CL_DISCONN_SUCCESS) |
6bbda15f TW |
498 | cl->state = MEI_FILE_DISCONNECTED; |
499 | ||
500 | cl->status = 0; | |
501 | cl->timer_count = 0; | |
502 | break; | |
503 | } | |
504 | } | |
505 | } | |
506 | ||
bb1b0133 | 507 | /** |
8120e720 | 508 | * mei_hbm_cl_connect_req - send connection request to specific me client |
bb1b0133 TW |
509 | * |
510 | * @dev: the device structure | |
8120e720 | 511 | * @cl: a client to connect to |
bb1b0133 | 512 | * |
8120e720 | 513 | * returns -EIO on write failure |
bb1b0133 | 514 | */ |
8120e720 | 515 | int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl) |
bb1b0133 | 516 | { |
e46f1874 | 517 | struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; |
bb1b0133 TW |
518 | const size_t len = sizeof(struct hbm_client_connect_request); |
519 | ||
e46f1874 TW |
520 | mei_hbm_hdr(mei_hdr, len); |
521 | mei_hbm_cl_hdr(cl, CLIENT_CONNECT_REQ_CMD, dev->wr_msg.data, len); | |
bb1b0133 | 522 | |
e46f1874 | 523 | return mei_write_message(dev, mei_hdr, dev->wr_msg.data); |
bb1b0133 TW |
524 | } |
525 | ||
6bbda15f | 526 | /** |
83ce0741 | 527 | * mei_hbm_cl_connect_res - connect response from the ME |
6bbda15f TW |
528 | * |
529 | * @dev: the device structure | |
530 | * @rs: connect response bus message | |
531 | */ | |
532 | static void mei_hbm_cl_connect_res(struct mei_device *dev, | |
533 | struct hbm_client_connect_response *rs) | |
534 | { | |
535 | ||
536 | struct mei_cl *cl; | |
64092858 | 537 | struct mei_cl_cb *cb, *next; |
6bbda15f | 538 | |
285e2996 AU |
539 | dev_dbg(&dev->pdev->dev, "hbm: connect response cl:host=%02d me=%02d status=%s\n", |
540 | rs->me_addr, rs->host_addr, | |
541 | mei_cl_conn_status_str(rs->status)); | |
6bbda15f | 542 | |
64092858 | 543 | cl = NULL; |
6bbda15f | 544 | |
64092858 | 545 | list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { |
6bbda15f | 546 | |
64092858 TW |
547 | cl = cb->cl; |
548 | /* this should not happen */ | |
549 | if (WARN_ON(!cl)) { | |
550 | list_del_init(&cb->list); | |
551 | continue; | |
552 | } | |
6bbda15f | 553 | |
64092858 TW |
554 | if (cb->fop_type != MEI_FOP_CONNECT) |
555 | continue; | |
6bbda15f | 556 | |
64092858 TW |
557 | if (mei_hbm_cl_addr_equal(cl, rs)) { |
558 | list_del(&cb->list); | |
559 | break; | |
6bbda15f TW |
560 | } |
561 | } | |
64092858 TW |
562 | |
563 | if (!cl) | |
564 | return; | |
565 | ||
566 | cl->timer_count = 0; | |
567 | if (rs->status == MEI_CL_CONN_SUCCESS) | |
568 | cl->state = MEI_FILE_CONNECTED; | |
569 | else | |
570 | cl->state = MEI_FILE_DISCONNECTED; | |
571 | cl->status = mei_cl_conn_status_to_errno(rs->status); | |
6bbda15f TW |
572 | } |
573 | ||
574 | ||
bb1b0133 | 575 | /** |
83ce0741 AU |
576 | * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware |
577 | * host sends disconnect response | |
bb1b0133 TW |
578 | * |
579 | * @dev: the device structure. | |
8120e720 | 580 | * @disconnect_req: disconnect request bus message from the me |
6bb948c9 TW |
581 | * |
582 | * returns -ENOMEM on allocation failure | |
bb1b0133 | 583 | */ |
6bb948c9 | 584 | static int mei_hbm_fw_disconnect_req(struct mei_device *dev, |
bb1b0133 TW |
585 | struct hbm_client_connect_request *disconnect_req) |
586 | { | |
31f88f57 | 587 | struct mei_cl *cl; |
6bb948c9 | 588 | struct mei_cl_cb *cb; |
bb1b0133 | 589 | |
31f88f57 | 590 | list_for_each_entry(cl, &dev->file_list, link) { |
cd51ed64 | 591 | if (mei_hbm_cl_addr_equal(cl, disconnect_req)) { |
bb1b0133 TW |
592 | dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", |
593 | disconnect_req->host_addr, | |
594 | disconnect_req->me_addr); | |
cd51ed64 TW |
595 | cl->state = MEI_FILE_DISCONNECTED; |
596 | cl->timer_count = 0; | |
bb1b0133 | 597 | |
6bb948c9 TW |
598 | cb = mei_io_cb_init(cl, NULL); |
599 | if (!cb) | |
600 | return -ENOMEM; | |
601 | cb->fop_type = MEI_FOP_DISCONNECT_RSP; | |
602 | cl_dbg(dev, cl, "add disconnect response as first\n"); | |
603 | list_add(&cb->list, &dev->ctrl_wr_list.list); | |
604 | ||
bb1b0133 TW |
605 | break; |
606 | } | |
607 | } | |
6bb948c9 | 608 | return 0; |
bb1b0133 TW |
609 | } |
610 | ||
611 | ||
2c9b48ac TW |
612 | /** |
613 | * mei_hbm_version_is_supported - checks whether the driver can | |
614 | * support the hbm version of the device | |
615 | * | |
616 | * @dev: the device structure | |
617 | * returns true if driver can support hbm version of the device | |
618 | */ | |
619 | bool mei_hbm_version_is_supported(struct mei_device *dev) | |
620 | { | |
621 | return (dev->version.major_version < HBM_MAJOR_VERSION) || | |
622 | (dev->version.major_version == HBM_MAJOR_VERSION && | |
623 | dev->version.minor_version <= HBM_MINOR_VERSION); | |
624 | } | |
625 | ||
bb1b0133 TW |
626 | /** |
627 | * mei_hbm_dispatch - bottom half read routine after ISR to | |
628 | * handle the read bus message cmd processing. | |
629 | * | |
630 | * @dev: the device structure | |
631 | * @mei_hdr: header of bus message | |
544f9460 TW |
632 | * |
633 | * returns 0 on success and < 0 on failure | |
bb1b0133 | 634 | */ |
544f9460 | 635 | int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) |
bb1b0133 TW |
636 | { |
637 | struct mei_bus_message *mei_msg; | |
638 | struct mei_me_client *me_client; | |
639 | struct hbm_host_version_response *version_res; | |
640 | struct hbm_client_connect_response *connect_res; | |
641 | struct hbm_client_connect_response *disconnect_res; | |
642 | struct hbm_client_connect_request *disconnect_req; | |
643 | struct hbm_flow_control *flow_control; | |
644 | struct hbm_props_response *props_res; | |
645 | struct hbm_host_enum_response *enum_res; | |
bb1b0133 TW |
646 | |
647 | /* read the message to our buffer */ | |
648 | BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf)); | |
649 | mei_read_slots(dev, dev->rd_msg_buf, hdr->length); | |
650 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; | |
651 | ||
66ae460b TW |
652 | /* ignore spurious message and prevent reset nesting |
653 | * hbm is put to idle during system reset | |
654 | */ | |
655 | if (dev->hbm_state == MEI_HBM_IDLE) { | |
656 | dev_dbg(&dev->pdev->dev, "hbm: state is idle ignore spurious messages\n"); | |
657 | return 0; | |
658 | } | |
659 | ||
bb1b0133 TW |
660 | switch (mei_msg->hbm_cmd) { |
661 | case HOST_START_RES_CMD: | |
544f9460 TW |
662 | dev_dbg(&dev->pdev->dev, "hbm: start: response message received.\n"); |
663 | ||
664 | dev->init_clients_timer = 0; | |
665 | ||
bb1b0133 | 666 | version_res = (struct hbm_host_version_response *)mei_msg; |
2c9b48ac TW |
667 | |
668 | dev_dbg(&dev->pdev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n", | |
669 | HBM_MAJOR_VERSION, HBM_MINOR_VERSION, | |
670 | version_res->me_max_version.major_version, | |
671 | version_res->me_max_version.minor_version); | |
672 | ||
673 | if (version_res->host_version_supported) { | |
674 | dev->version.major_version = HBM_MAJOR_VERSION; | |
675 | dev->version.minor_version = HBM_MINOR_VERSION; | |
676 | } else { | |
677 | dev->version.major_version = | |
678 | version_res->me_max_version.major_version; | |
679 | dev->version.minor_version = | |
680 | version_res->me_max_version.minor_version; | |
681 | } | |
682 | ||
683 | if (!mei_hbm_version_is_supported(dev)) { | |
544f9460 | 684 | dev_warn(&dev->pdev->dev, "hbm: start: version mismatch - stopping the driver.\n"); |
bb1b0133 | 685 | |
544f9460 | 686 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 | 687 | if (mei_hbm_stop_req(dev)) { |
544f9460 TW |
688 | dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); |
689 | return -EIO; | |
690 | } | |
691 | break; | |
692 | } | |
9b0d5efc | 693 | |
544f9460 TW |
694 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || |
695 | dev->hbm_state != MEI_HBM_START) { | |
696 | dev_err(&dev->pdev->dev, "hbm: start: state mismatch, [%d, %d]\n", | |
697 | dev->dev_state, dev->hbm_state); | |
698 | return -EPROTO; | |
e46f1874 | 699 | } |
bb1b0133 | 700 | |
544f9460 TW |
701 | dev->hbm_state = MEI_HBM_STARTED; |
702 | ||
703 | if (mei_hbm_enum_clients_req(dev)) { | |
704 | dev_err(&dev->pdev->dev, "hbm: start: failed to send enumeration request\n"); | |
705 | return -EIO; | |
bb1b0133 TW |
706 | } |
707 | ||
9b0d5efc | 708 | wake_up_interruptible(&dev->wait_recvd_msg); |
bb1b0133 TW |
709 | break; |
710 | ||
711 | case CLIENT_CONNECT_RES_CMD: | |
544f9460 TW |
712 | dev_dbg(&dev->pdev->dev, "hbm: client connect response: message received.\n"); |
713 | ||
bb1b0133 | 714 | connect_res = (struct hbm_client_connect_response *) mei_msg; |
6bbda15f | 715 | mei_hbm_cl_connect_res(dev, connect_res); |
bb1b0133 TW |
716 | wake_up(&dev->wait_recvd_msg); |
717 | break; | |
718 | ||
719 | case CLIENT_DISCONNECT_RES_CMD: | |
544f9460 TW |
720 | dev_dbg(&dev->pdev->dev, "hbm: client disconnect response: message received.\n"); |
721 | ||
bb1b0133 | 722 | disconnect_res = (struct hbm_client_connect_response *) mei_msg; |
6bbda15f | 723 | mei_hbm_cl_disconnect_res(dev, disconnect_res); |
bb1b0133 TW |
724 | wake_up(&dev->wait_recvd_msg); |
725 | break; | |
726 | ||
727 | case MEI_FLOW_CONTROL_CMD: | |
544f9460 TW |
728 | dev_dbg(&dev->pdev->dev, "hbm: client flow control response: message received.\n"); |
729 | ||
bb1b0133 | 730 | flow_control = (struct hbm_flow_control *) mei_msg; |
6bbda15f | 731 | mei_hbm_cl_flow_control_res(dev, flow_control); |
bb1b0133 TW |
732 | break; |
733 | ||
4fcbc99b TW |
734 | case MEI_PG_ISOLATION_ENTRY_RES_CMD: |
735 | dev_dbg(&dev->pdev->dev, "power gate isolation entry response received\n"); | |
ba9cdd0e | 736 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
4fcbc99b TW |
737 | if (waitqueue_active(&dev->wait_pg)) |
738 | wake_up(&dev->wait_pg); | |
739 | break; | |
740 | ||
741 | case MEI_PG_ISOLATION_EXIT_REQ_CMD: | |
742 | dev_dbg(&dev->pdev->dev, "power gate isolation exit request received\n"); | |
ba9cdd0e | 743 | dev->pg_event = MEI_PG_EVENT_RECEIVED; |
4fcbc99b TW |
744 | if (waitqueue_active(&dev->wait_pg)) |
745 | wake_up(&dev->wait_pg); | |
180ea05b TW |
746 | else |
747 | /* | |
748 | * If the driver is not waiting on this then | |
749 | * this is HW initiated exit from PG. | |
750 | * Start runtime pm resume sequence to exit from PG. | |
751 | */ | |
752 | pm_request_resume(&dev->pdev->dev); | |
4fcbc99b TW |
753 | break; |
754 | ||
bb1b0133 | 755 | case HOST_CLIENT_PROPERTIES_RES_CMD: |
544f9460 TW |
756 | dev_dbg(&dev->pdev->dev, "hbm: properties response: message received.\n"); |
757 | ||
758 | dev->init_clients_timer = 0; | |
759 | ||
760 | if (dev->me_clients == NULL) { | |
761 | dev_err(&dev->pdev->dev, "hbm: properties response: mei_clients not allocated\n"); | |
762 | return -EPROTO; | |
763 | } | |
764 | ||
bb1b0133 TW |
765 | props_res = (struct hbm_props_response *)mei_msg; |
766 | me_client = &dev->me_clients[dev->me_client_presentation_num]; | |
767 | ||
544f9460 TW |
768 | if (props_res->status) { |
769 | dev_err(&dev->pdev->dev, "hbm: properties response: wrong status = %d\n", | |
770 | props_res->status); | |
771 | return -EPROTO; | |
bb1b0133 TW |
772 | } |
773 | ||
774 | if (me_client->client_id != props_res->address) { | |
544f9460 TW |
775 | dev_err(&dev->pdev->dev, "hbm: properties response: address mismatch %d ?= %d\n", |
776 | me_client->client_id, props_res->address); | |
777 | return -EPROTO; | |
bb1b0133 TW |
778 | } |
779 | ||
780 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || | |
9b0d5efc | 781 | dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { |
544f9460 TW |
782 | dev_err(&dev->pdev->dev, "hbm: properties response: state mismatch, [%d, %d]\n", |
783 | dev->dev_state, dev->hbm_state); | |
784 | return -EPROTO; | |
bb1b0133 TW |
785 | } |
786 | ||
787 | me_client->props = props_res->client_properties; | |
788 | dev->me_client_index++; | |
789 | dev->me_client_presentation_num++; | |
790 | ||
8120e720 | 791 | /* request property for the next client */ |
544f9460 TW |
792 | if (mei_hbm_prop_req(dev)) |
793 | return -EIO; | |
bb1b0133 TW |
794 | |
795 | break; | |
796 | ||
797 | case HOST_ENUM_RES_CMD: | |
544f9460 TW |
798 | dev_dbg(&dev->pdev->dev, "hbm: enumeration response: message received\n"); |
799 | ||
800 | dev->init_clients_timer = 0; | |
801 | ||
bb1b0133 | 802 | enum_res = (struct hbm_host_enum_response *) mei_msg; |
23f5a322 TW |
803 | BUILD_BUG_ON(sizeof(dev->me_clients_map) |
804 | < sizeof(enum_res->valid_addresses)); | |
805 | memcpy(dev->me_clients_map, enum_res->valid_addresses, | |
806 | sizeof(enum_res->valid_addresses)); | |
544f9460 TW |
807 | |
808 | if (dev->dev_state != MEI_DEV_INIT_CLIENTS || | |
809 | dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { | |
810 | dev_err(&dev->pdev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n", | |
811 | dev->dev_state, dev->hbm_state); | |
812 | return -EPROTO; | |
bb1b0133 | 813 | } |
544f9460 TW |
814 | |
815 | if (mei_hbm_me_cl_allocate(dev)) { | |
816 | dev_err(&dev->pdev->dev, "hbm: enumeration response: cannot allocate clients array\n"); | |
817 | return -ENOMEM; | |
818 | } | |
819 | ||
820 | dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES; | |
821 | ||
822 | /* first property request */ | |
823 | if (mei_hbm_prop_req(dev)) | |
824 | return -EIO; | |
825 | ||
bb1b0133 TW |
826 | break; |
827 | ||
828 | case HOST_STOP_RES_CMD: | |
544f9460 TW |
829 | dev_dbg(&dev->pdev->dev, "hbm: stop response: message received\n"); |
830 | ||
831 | dev->init_clients_timer = 0; | |
832 | ||
833 | if (dev->hbm_state != MEI_HBM_STOPPED) { | |
834 | dev_err(&dev->pdev->dev, "hbm: stop response: state mismatch, [%d, %d]\n", | |
835 | dev->dev_state, dev->hbm_state); | |
836 | return -EPROTO; | |
837 | } | |
9b0d5efc | 838 | |
33ec0826 | 839 | dev->dev_state = MEI_DEV_POWER_DOWN; |
544f9460 TW |
840 | dev_info(&dev->pdev->dev, "hbm: stop response: resetting.\n"); |
841 | /* force the reset */ | |
842 | return -EPROTO; | |
bb1b0133 TW |
843 | break; |
844 | ||
845 | case CLIENT_DISCONNECT_REQ_CMD: | |
544f9460 TW |
846 | dev_dbg(&dev->pdev->dev, "hbm: disconnect request: message received\n"); |
847 | ||
bb1b0133 | 848 | disconnect_req = (struct hbm_client_connect_request *)mei_msg; |
8120e720 | 849 | mei_hbm_fw_disconnect_req(dev, disconnect_req); |
bb1b0133 TW |
850 | break; |
851 | ||
852 | case ME_STOP_REQ_CMD: | |
544f9460 | 853 | dev_dbg(&dev->pdev->dev, "hbm: stop request: message received\n"); |
544f9460 | 854 | dev->hbm_state = MEI_HBM_STOPPED; |
6bb948c9 TW |
855 | if (mei_hbm_stop_req(dev)) { |
856 | dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); | |
857 | return -EIO; | |
858 | } | |
bb1b0133 | 859 | break; |
bb1b0133 TW |
860 | default: |
861 | BUG(); | |
862 | break; | |
863 | ||
864 | } | |
544f9460 | 865 | return 0; |
bb1b0133 TW |
866 | } |
867 |