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Commit | Line | Data |
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fb7d879f OW |
1 | /* |
2 | * | |
3 | * Intel Management Engine Interface (Intel MEI) Linux driver | |
733ba91c | 4 | * Copyright (c) 2003-2012, Intel Corporation. |
fb7d879f OW |
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 | ||
17 | ||
40e0b67b | 18 | #include <linux/export.h> |
fb7d879f OW |
19 | #include <linux/pci.h> |
20 | #include <linux/kthread.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/jiffies.h> | |
24 | ||
4f3afe1d | 25 | #include <linux/mei.h> |
47a73801 TW |
26 | |
27 | #include "mei_dev.h" | |
0edb23fc | 28 | #include "hbm.h" |
9dc64d6a | 29 | #include "hw-me.h" |
90e0b5f1 | 30 | #include "client.h" |
fb7d879f OW |
31 | |
32 | ||
4c6e22b8 | 33 | /** |
83ce0741 | 34 | * mei_irq_compl_handler - dispatch complete handlers |
4c6e22b8 TW |
35 | * for the completed callbacks |
36 | * | |
37 | * @dev - mei device | |
38 | * @compl_list - list of completed cbs | |
39 | */ | |
40 | void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *compl_list) | |
41 | { | |
42 | struct mei_cl_cb *cb, *next; | |
43 | struct mei_cl *cl; | |
44 | ||
45 | list_for_each_entry_safe(cb, next, &compl_list->list, list) { | |
46 | cl = cb->cl; | |
47 | list_del(&cb->list); | |
48 | if (!cl) | |
49 | continue; | |
50 | ||
51 | dev_dbg(&dev->pdev->dev, "completing call back.\n"); | |
52 | if (cl == &dev->iamthif_cl) | |
53 | mei_amthif_complete(dev, cb); | |
54 | else | |
db086fa9 | 55 | mei_cl_complete(cl, cb); |
4c6e22b8 TW |
56 | } |
57 | } | |
40e0b67b | 58 | EXPORT_SYMBOL_GPL(mei_irq_compl_handler); |
6e0f180f | 59 | |
fb7d879f | 60 | /** |
6e0f180f | 61 | * mei_cl_hbm_equal - check if hbm is addressed to the client |
fb7d879f | 62 | * |
6e0f180f | 63 | * @cl: host client |
fb7d879f OW |
64 | * @mei_hdr: header of mei client message |
65 | * | |
6e0f180f | 66 | * returns true if matches, false otherwise |
fb7d879f | 67 | */ |
6e0f180f TW |
68 | static inline int mei_cl_hbm_equal(struct mei_cl *cl, |
69 | struct mei_msg_hdr *mei_hdr) | |
fb7d879f | 70 | { |
6e0f180f TW |
71 | return cl->host_client_id == mei_hdr->host_addr && |
72 | cl->me_client_id == mei_hdr->me_addr; | |
73 | } | |
74 | /** | |
75 | * mei_cl_is_reading - checks if the client | |
76 | is the one to read this message | |
77 | * | |
78 | * @cl: mei client | |
79 | * @mei_hdr: header of mei message | |
80 | * | |
81 | * returns true on match and false otherwise | |
82 | */ | |
83 | static bool mei_cl_is_reading(struct mei_cl *cl, struct mei_msg_hdr *mei_hdr) | |
84 | { | |
85 | return mei_cl_hbm_equal(cl, mei_hdr) && | |
fb7d879f | 86 | cl->state == MEI_FILE_CONNECTED && |
6e0f180f | 87 | cl->reading_state != MEI_READ_COMPLETE; |
fb7d879f OW |
88 | } |
89 | ||
90 | /** | |
6e0f180f | 91 | * mei_irq_read_client_message - process client message |
fb7d879f | 92 | * |
fb7d879f OW |
93 | * @dev: the device structure |
94 | * @mei_hdr: header of mei client message | |
6e0f180f | 95 | * @complete_list: An instance of our list structure |
fb7d879f OW |
96 | * |
97 | * returns 0 on success, <0 on failure. | |
98 | */ | |
6e0f180f TW |
99 | static int mei_cl_irq_read_msg(struct mei_device *dev, |
100 | struct mei_msg_hdr *mei_hdr, | |
101 | struct mei_cl_cb *complete_list) | |
fb7d879f OW |
102 | { |
103 | struct mei_cl *cl; | |
6e0f180f | 104 | struct mei_cl_cb *cb, *next; |
479bc59d | 105 | unsigned char *buffer = NULL; |
fb7d879f | 106 | |
6e0f180f TW |
107 | list_for_each_entry_safe(cb, next, &dev->read_list.list, list) { |
108 | cl = cb->cl; | |
109 | if (!cl || !mei_cl_is_reading(cl, mei_hdr)) | |
110 | continue; | |
111 | ||
112 | cl->reading_state = MEI_READING; | |
113 | ||
114 | if (cb->response_buffer.size == 0 || | |
115 | cb->response_buffer.data == NULL) { | |
c0abffbd | 116 | cl_err(dev, cl, "response buffer is not allocated.\n"); |
6e0f180f TW |
117 | list_del(&cb->list); |
118 | return -ENOMEM; | |
119 | } | |
120 | ||
121 | if (cb->response_buffer.size < mei_hdr->length + cb->buf_idx) { | |
c0abffbd | 122 | cl_dbg(dev, cl, "message overflow. size %d len %d idx %ld\n", |
fcb136e1 TW |
123 | cb->response_buffer.size, |
124 | mei_hdr->length, cb->buf_idx); | |
46e407dd WY |
125 | buffer = krealloc(cb->response_buffer.data, |
126 | mei_hdr->length + cb->buf_idx, | |
127 | GFP_KERNEL); | |
fcb136e1 | 128 | |
46e407dd | 129 | if (!buffer) { |
c0abffbd | 130 | cl_err(dev, cl, "allocation failed.\n"); |
fcb136e1 TW |
131 | list_del(&cb->list); |
132 | return -ENOMEM; | |
133 | } | |
46e407dd | 134 | cb->response_buffer.data = buffer; |
fcb136e1 TW |
135 | cb->response_buffer.size = |
136 | mei_hdr->length + cb->buf_idx; | |
fb7d879f OW |
137 | } |
138 | ||
6e0f180f TW |
139 | buffer = cb->response_buffer.data + cb->buf_idx; |
140 | mei_read_slots(dev, buffer, mei_hdr->length); | |
141 | ||
142 | cb->buf_idx += mei_hdr->length; | |
143 | if (mei_hdr->msg_complete) { | |
144 | cl->status = 0; | |
145 | list_del(&cb->list); | |
c0abffbd | 146 | cl_dbg(dev, cl, "completed read length = %lu\n", |
6e0f180f TW |
147 | cb->buf_idx); |
148 | list_add_tail(&cb->list, &complete_list->list); | |
149 | } | |
150 | break; | |
fb7d879f OW |
151 | } |
152 | ||
fb7d879f OW |
153 | dev_dbg(&dev->pdev->dev, "message read\n"); |
154 | if (!buffer) { | |
edf1eed4 | 155 | mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length); |
15d4acc5 TW |
156 | dev_dbg(&dev->pdev->dev, "discarding message " MEI_HDR_FMT "\n", |
157 | MEI_HDR_PRM(mei_hdr)); | |
fb7d879f OW |
158 | } |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
6bb948c9 TW |
163 | /** |
164 | * mei_cl_irq_disconnect_rsp - send disconnection response message | |
165 | * | |
166 | * @cl: client | |
167 | * @cb: callback block. | |
168 | * @slots: free slots. | |
169 | * @cmpl_list: complete list. | |
170 | * | |
171 | * returns 0, OK; otherwise, error. | |
172 | */ | |
173 | static int mei_cl_irq_disconnect_rsp(struct mei_cl *cl, struct mei_cl_cb *cb, | |
174 | s32 *slots, struct mei_cl_cb *cmpl_list) | |
175 | { | |
176 | struct mei_device *dev = cl->dev; | |
177 | int ret; | |
178 | ||
179 | u32 msg_slots = | |
180 | mei_data2slots(sizeof(struct hbm_client_connect_response)); | |
181 | ||
182 | if (*slots < msg_slots) | |
183 | return -EMSGSIZE; | |
184 | ||
185 | *slots -= msg_slots; | |
186 | ||
187 | ret = mei_hbm_cl_disconnect_rsp(dev, cl); | |
188 | ||
189 | cl->state = MEI_FILE_DISCONNECTED; | |
190 | cl->status = 0; | |
191 | mei_io_cb_free(cb); | |
192 | ||
193 | return ret; | |
194 | } | |
195 | ||
196 | ||
197 | ||
fb7d879f | 198 | /** |
6220d6a0 TW |
199 | * mei_cl_irq_close - processes close related operation from |
200 | * interrupt thread context - send disconnect request | |
fb7d879f | 201 | * |
6220d6a0 TW |
202 | * @cl: client |
203 | * @cb: callback block. | |
fb7d879f | 204 | * @slots: free slots. |
fb7d879f OW |
205 | * @cmpl_list: complete list. |
206 | * | |
207 | * returns 0, OK; otherwise, error. | |
208 | */ | |
6220d6a0 TW |
209 | static int mei_cl_irq_close(struct mei_cl *cl, struct mei_cl_cb *cb, |
210 | s32 *slots, struct mei_cl_cb *cmpl_list) | |
fb7d879f | 211 | { |
6220d6a0 TW |
212 | struct mei_device *dev = cl->dev; |
213 | ||
c8c8d080 TW |
214 | u32 msg_slots = |
215 | mei_data2slots(sizeof(struct hbm_client_connect_request)); | |
fb7d879f | 216 | |
c8c8d080 TW |
217 | if (*slots < msg_slots) |
218 | return -EMSGSIZE; | |
219 | ||
220 | *slots -= msg_slots; | |
b45f3ccf | 221 | |
8120e720 | 222 | if (mei_hbm_cl_disconnect_req(dev, cl)) { |
b45f3ccf | 223 | cl->status = 0; |
6220d6a0 TW |
224 | cb->buf_idx = 0; |
225 | list_move_tail(&cb->list, &cmpl_list->list); | |
c8c8d080 | 226 | return -EIO; |
fb7d879f OW |
227 | } |
228 | ||
c8c8d080 TW |
229 | cl->state = MEI_FILE_DISCONNECTING; |
230 | cl->status = 0; | |
6220d6a0 TW |
231 | cb->buf_idx = 0; |
232 | list_move_tail(&cb->list, &dev->ctrl_rd_list.list); | |
c8c8d080 TW |
233 | cl->timer_count = MEI_CONNECT_TIMEOUT; |
234 | ||
fb7d879f OW |
235 | return 0; |
236 | } | |
237 | ||
fb7d879f OW |
238 | |
239 | /** | |
6220d6a0 TW |
240 | * mei_cl_irq_close - processes client read related operation from the |
241 | * interrupt thread context - request for flow control credits | |
fb7d879f | 242 | * |
6220d6a0 TW |
243 | * @cl: client |
244 | * @cb: callback block. | |
fb7d879f | 245 | * @slots: free slots. |
fb7d879f OW |
246 | * @cmpl_list: complete list. |
247 | * | |
248 | * returns 0, OK; otherwise, error. | |
249 | */ | |
6220d6a0 TW |
250 | static int mei_cl_irq_read(struct mei_cl *cl, struct mei_cl_cb *cb, |
251 | s32 *slots, struct mei_cl_cb *cmpl_list) | |
fb7d879f | 252 | { |
6220d6a0 | 253 | struct mei_device *dev = cl->dev; |
c8c8d080 TW |
254 | u32 msg_slots = mei_data2slots(sizeof(struct hbm_flow_control)); |
255 | ||
2ebf8c94 TW |
256 | int ret; |
257 | ||
258 | ||
c8c8d080 | 259 | if (*slots < msg_slots) { |
fb7d879f | 260 | /* return the cancel routine */ |
6220d6a0 | 261 | list_del(&cb->list); |
c8c8d080 | 262 | return -EMSGSIZE; |
fb7d879f OW |
263 | } |
264 | ||
c8c8d080 | 265 | *slots -= msg_slots; |
7bdf72d3 | 266 | |
2ebf8c94 TW |
267 | ret = mei_hbm_cl_flow_control_req(dev, cl); |
268 | if (ret) { | |
269 | cl->status = ret; | |
6220d6a0 TW |
270 | cb->buf_idx = 0; |
271 | list_move_tail(&cb->list, &cmpl_list->list); | |
2ebf8c94 | 272 | return ret; |
1ccb7b62 | 273 | } |
2ebf8c94 | 274 | |
6220d6a0 | 275 | list_move_tail(&cb->list, &dev->read_list.list); |
1ccb7b62 | 276 | |
fb7d879f OW |
277 | return 0; |
278 | } | |
279 | ||
280 | ||
281 | /** | |
02a7eecc | 282 | * mei_cl_irq_connect - send connect request in irq_thread context |
fb7d879f | 283 | * |
6220d6a0 TW |
284 | * @cl: client |
285 | * @cb: callback block. | |
fb7d879f | 286 | * @slots: free slots. |
fb7d879f OW |
287 | * @cmpl_list: complete list. |
288 | * | |
289 | * returns 0, OK; otherwise, error. | |
290 | */ | |
02a7eecc | 291 | static int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb, |
6220d6a0 | 292 | s32 *slots, struct mei_cl_cb *cmpl_list) |
fb7d879f | 293 | { |
6220d6a0 | 294 | struct mei_device *dev = cl->dev; |
2ebf8c94 | 295 | int ret; |
6220d6a0 | 296 | |
c8c8d080 TW |
297 | u32 msg_slots = |
298 | mei_data2slots(sizeof(struct hbm_client_connect_request)); | |
299 | ||
02a7eecc TW |
300 | if (mei_cl_is_other_connecting(cl)) |
301 | return 0; | |
302 | ||
c8c8d080 | 303 | if (*slots < msg_slots) { |
fb7d879f | 304 | /* return the cancel routine */ |
6220d6a0 | 305 | list_del(&cb->list); |
c8c8d080 | 306 | return -EMSGSIZE; |
fb7d879f OW |
307 | } |
308 | ||
c8c8d080 TW |
309 | *slots -= msg_slots; |
310 | ||
b45f3ccf | 311 | cl->state = MEI_FILE_CONNECTING; |
c8c8d080 | 312 | |
2ebf8c94 TW |
313 | ret = mei_hbm_cl_connect_req(dev, cl); |
314 | if (ret) { | |
315 | cl->status = ret; | |
6220d6a0 TW |
316 | cb->buf_idx = 0; |
317 | list_del(&cb->list); | |
2ebf8c94 | 318 | return ret; |
b45f3ccf | 319 | } |
6220d6a0 TW |
320 | |
321 | list_move_tail(&cb->list, &dev->ctrl_rd_list.list); | |
322 | cl->timer_count = MEI_CONNECT_TIMEOUT; | |
fb7d879f OW |
323 | return 0; |
324 | } | |
325 | ||
fb7d879f | 326 | |
fb7d879f | 327 | /** |
393b148f | 328 | * mei_irq_read_handler - bottom half read routine after ISR to |
fb7d879f OW |
329 | * handle the read processing. |
330 | * | |
fb7d879f | 331 | * @dev: the device structure |
06ecd645 | 332 | * @cmpl_list: An instance of our list structure |
fb7d879f OW |
333 | * @slots: slots to read. |
334 | * | |
335 | * returns 0 on success, <0 on failure. | |
336 | */ | |
06ecd645 TW |
337 | int mei_irq_read_handler(struct mei_device *dev, |
338 | struct mei_cl_cb *cmpl_list, s32 *slots) | |
fb7d879f OW |
339 | { |
340 | struct mei_msg_hdr *mei_hdr; | |
10ee9074 TW |
341 | struct mei_cl *cl; |
342 | int ret; | |
fb7d879f OW |
343 | |
344 | if (!dev->rd_msg_hdr) { | |
827eef51 | 345 | dev->rd_msg_hdr = mei_read_hdr(dev); |
fb7d879f OW |
346 | (*slots)--; |
347 | dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots); | |
348 | } | |
349 | mei_hdr = (struct mei_msg_hdr *) &dev->rd_msg_hdr; | |
15d4acc5 | 350 | dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr)); |
fb7d879f OW |
351 | |
352 | if (mei_hdr->reserved || !dev->rd_msg_hdr) { | |
10ee9074 TW |
353 | dev_err(&dev->pdev->dev, "corrupted message header 0x%08X\n", |
354 | dev->rd_msg_hdr); | |
fb7d879f OW |
355 | ret = -EBADMSG; |
356 | goto end; | |
357 | } | |
358 | ||
10ee9074 TW |
359 | if (mei_slots2data(*slots) < mei_hdr->length) { |
360 | dev_err(&dev->pdev->dev, "less data available than length=%08x.\n", | |
fb7d879f OW |
361 | *slots); |
362 | /* we can't read the message */ | |
363 | ret = -ERANGE; | |
364 | goto end; | |
365 | } | |
366 | ||
10ee9074 TW |
367 | /* HBM message */ |
368 | if (mei_hdr->host_addr == 0 && mei_hdr->me_addr == 0) { | |
544f9460 TW |
369 | ret = mei_hbm_dispatch(dev, mei_hdr); |
370 | if (ret) { | |
371 | dev_dbg(&dev->pdev->dev, "mei_hbm_dispatch failed ret = %d\n", | |
372 | ret); | |
373 | goto end; | |
374 | } | |
10ee9074 TW |
375 | goto reset_slots; |
376 | } | |
15d4acc5 | 377 | |
83ce0741 | 378 | /* find recipient cl */ |
10ee9074 TW |
379 | list_for_each_entry(cl, &dev->file_list, link) { |
380 | if (mei_cl_hbm_equal(cl, mei_hdr)) { | |
381 | cl_dbg(dev, cl, "got a message\n"); | |
382 | break; | |
383 | } | |
384 | } | |
385 | ||
83ce0741 | 386 | /* if no recipient cl was found we assume corrupted header */ |
10ee9074 TW |
387 | if (&cl->link == &dev->file_list) { |
388 | dev_err(&dev->pdev->dev, "no destination client found 0x%08X\n", | |
389 | dev->rd_msg_hdr); | |
390 | ret = -EBADMSG; | |
391 | goto end; | |
392 | } | |
393 | ||
394 | if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id && | |
395 | MEI_FILE_CONNECTED == dev->iamthif_cl.state && | |
396 | dev->iamthif_state == MEI_IAMTHIF_READING) { | |
19838fb8 | 397 | |
5ceb46e2 | 398 | ret = mei_amthif_irq_read_msg(dev, mei_hdr, cmpl_list); |
10ee9074 TW |
399 | if (ret) { |
400 | dev_err(&dev->pdev->dev, "mei_amthif_irq_read_msg failed = %d\n", | |
401 | ret); | |
fb7d879f | 402 | goto end; |
10ee9074 | 403 | } |
fb7d879f | 404 | } else { |
6e0f180f | 405 | ret = mei_cl_irq_read_msg(dev, mei_hdr, cmpl_list); |
10ee9074 TW |
406 | if (ret) { |
407 | dev_err(&dev->pdev->dev, "mei_cl_irq_read_msg failed = %d\n", | |
408 | ret); | |
fb7d879f | 409 | goto end; |
10ee9074 | 410 | } |
fb7d879f OW |
411 | } |
412 | ||
10ee9074 | 413 | reset_slots: |
fb7d879f OW |
414 | /* reset the number of slots and header */ |
415 | *slots = mei_count_full_read_slots(dev); | |
416 | dev->rd_msg_hdr = 0; | |
417 | ||
418 | if (*slots == -EOVERFLOW) { | |
419 | /* overflow - reset */ | |
6e0f180f | 420 | dev_err(&dev->pdev->dev, "resetting due to slots overflow.\n"); |
fb7d879f OW |
421 | /* set the event since message has been read */ |
422 | ret = -ERANGE; | |
423 | goto end; | |
424 | } | |
425 | end: | |
426 | return ret; | |
427 | } | |
40e0b67b | 428 | EXPORT_SYMBOL_GPL(mei_irq_read_handler); |
fb7d879f OW |
429 | |
430 | ||
431 | /** | |
06ecd645 TW |
432 | * mei_irq_write_handler - dispatch write requests |
433 | * after irq received | |
fb7d879f | 434 | * |
fb7d879f | 435 | * @dev: the device structure |
9a84d616 | 436 | * @cmpl_list: An instance of our list structure |
fb7d879f OW |
437 | * |
438 | * returns 0 on success, <0 on failure. | |
439 | */ | |
c8c8d080 | 440 | int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) |
fb7d879f OW |
441 | { |
442 | ||
443 | struct mei_cl *cl; | |
6220d6a0 | 444 | struct mei_cl_cb *cb, *next; |
fb601adb | 445 | struct mei_cl_cb *list; |
9a84d616 | 446 | s32 slots; |
fb7d879f OW |
447 | int ret; |
448 | ||
6aae48ff TW |
449 | |
450 | if (!mei_hbuf_acquire(dev)) | |
fb7d879f | 451 | return 0; |
6aae48ff | 452 | |
9a84d616 TW |
453 | slots = mei_hbuf_empty_slots(dev); |
454 | if (slots <= 0) | |
7d5e0e59 TW |
455 | return -EMSGSIZE; |
456 | ||
fb7d879f OW |
457 | /* complete all waiting for write CB */ |
458 | dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n"); | |
459 | ||
460 | list = &dev->write_waiting_list; | |
6220d6a0 TW |
461 | list_for_each_entry_safe(cb, next, &list->list, list) { |
462 | cl = cb->cl; | |
b7cd2d9f TW |
463 | if (cl == NULL) |
464 | continue; | |
465 | ||
466 | cl->status = 0; | |
6220d6a0 | 467 | list_del(&cb->list); |
b7cd2d9f | 468 | if (MEI_WRITING == cl->writing_state && |
6220d6a0 | 469 | cb->fop_type == MEI_FOP_WRITE && |
4b8960b4 | 470 | cl != &dev->iamthif_cl) { |
c0abffbd | 471 | cl_dbg(dev, cl, "MEI WRITE COMPLETE\n"); |
b7cd2d9f | 472 | cl->writing_state = MEI_WRITE_COMPLETE; |
6220d6a0 | 473 | list_add_tail(&cb->list, &cmpl_list->list); |
b7cd2d9f TW |
474 | } |
475 | if (cl == &dev->iamthif_cl) { | |
c0abffbd | 476 | cl_dbg(dev, cl, "check iamthif flow control.\n"); |
b7cd2d9f | 477 | if (dev->iamthif_flow_control_pending) { |
9a84d616 | 478 | ret = mei_amthif_irq_read(dev, &slots); |
b7cd2d9f TW |
479 | if (ret) |
480 | return ret; | |
fb7d879f | 481 | } |
fb7d879f OW |
482 | } |
483 | } | |
484 | ||
c216fdeb TW |
485 | if (dev->wd_state == MEI_WD_STOPPING) { |
486 | dev->wd_state = MEI_WD_IDLE; | |
fb7d879f | 487 | wake_up_interruptible(&dev->wait_stop_wd); |
fb7d879f OW |
488 | } |
489 | ||
64092858 | 490 | if (mei_cl_is_connected(&dev->wd_cl)) { |
fb7d879f | 491 | if (dev->wd_pending && |
90e0b5f1 | 492 | mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) { |
fb7d879f OW |
493 | if (mei_wd_send(dev)) |
494 | dev_dbg(&dev->pdev->dev, "wd send failed.\n"); | |
90e0b5f1 | 495 | else if (mei_cl_flow_ctrl_reduce(&dev->wd_cl)) |
483136ea | 496 | return -ENODEV; |
fb7d879f | 497 | |
eb9af0ac | 498 | dev->wd_pending = false; |
fb7d879f | 499 | |
c216fdeb | 500 | if (dev->wd_state == MEI_WD_RUNNING) |
9a84d616 | 501 | slots -= mei_data2slots(MEI_WD_START_MSG_SIZE); |
d242a0af | 502 | else |
9a84d616 | 503 | slots -= mei_data2slots(MEI_WD_STOP_MSG_SIZE); |
fb7d879f OW |
504 | } |
505 | } | |
fb7d879f OW |
506 | |
507 | /* complete control write list CB */ | |
c8372094 | 508 | dev_dbg(&dev->pdev->dev, "complete control write list cb.\n"); |
6220d6a0 TW |
509 | list_for_each_entry_safe(cb, next, &dev->ctrl_wr_list.list, list) { |
510 | cl = cb->cl; | |
c8372094 | 511 | if (!cl) { |
6220d6a0 | 512 | list_del(&cb->list); |
c8372094 TW |
513 | return -ENODEV; |
514 | } | |
6220d6a0 | 515 | switch (cb->fop_type) { |
4b8960b4 | 516 | case MEI_FOP_CLOSE: |
c8372094 | 517 | /* send disconnect message */ |
6220d6a0 | 518 | ret = mei_cl_irq_close(cl, cb, &slots, cmpl_list); |
c8372094 TW |
519 | if (ret) |
520 | return ret; | |
fb7d879f | 521 | |
c8372094 | 522 | break; |
4b8960b4 | 523 | case MEI_FOP_READ: |
c8372094 | 524 | /* send flow control message */ |
6220d6a0 | 525 | ret = mei_cl_irq_read(cl, cb, &slots, cmpl_list); |
c8372094 TW |
526 | if (ret) |
527 | return ret; | |
fb7d879f | 528 | |
c8372094 | 529 | break; |
02a7eecc | 530 | case MEI_FOP_CONNECT: |
c8372094 | 531 | /* connect message */ |
02a7eecc | 532 | ret = mei_cl_irq_connect(cl, cb, &slots, cmpl_list); |
c8372094 TW |
533 | if (ret) |
534 | return ret; | |
fb7d879f | 535 | |
c8372094 | 536 | break; |
6bb948c9 TW |
537 | case MEI_FOP_DISCONNECT_RSP: |
538 | /* send disconnect resp */ | |
539 | ret = mei_cl_irq_disconnect_rsp(cl, cb, &slots, cmpl_list); | |
540 | if (ret) | |
541 | return ret; | |
c8372094 TW |
542 | default: |
543 | BUG(); | |
fb7d879f | 544 | } |
c8372094 | 545 | |
fb7d879f OW |
546 | } |
547 | /* complete write list CB */ | |
b7cd2d9f | 548 | dev_dbg(&dev->pdev->dev, "complete write list cb.\n"); |
6220d6a0 TW |
549 | list_for_each_entry_safe(cb, next, &dev->write_list.list, list) { |
550 | cl = cb->cl; | |
b7cd2d9f TW |
551 | if (cl == NULL) |
552 | continue; | |
be9d87a7 | 553 | if (cl == &dev->iamthif_cl) |
6220d6a0 TW |
554 | ret = mei_amthif_irq_write_complete(cl, cb, |
555 | &slots, cmpl_list); | |
be9d87a7 | 556 | else |
6220d6a0 TW |
557 | ret = mei_cl_irq_write_complete(cl, cb, |
558 | &slots, cmpl_list); | |
be9d87a7 TW |
559 | if (ret) |
560 | return ret; | |
fb7d879f OW |
561 | } |
562 | return 0; | |
563 | } | |
40e0b67b | 564 | EXPORT_SYMBOL_GPL(mei_irq_write_handler); |
fb7d879f OW |
565 | |
566 | ||
567 | ||
568 | /** | |
569 | * mei_timer - timer function. | |
570 | * | |
571 | * @work: pointer to the work_struct structure | |
572 | * | |
fb7d879f | 573 | */ |
a61c6530 | 574 | void mei_timer(struct work_struct *work) |
fb7d879f OW |
575 | { |
576 | unsigned long timeout; | |
31f88f57 | 577 | struct mei_cl *cl; |
fb7d879f OW |
578 | struct mei_cl_cb *cb_pos = NULL; |
579 | struct mei_cl_cb *cb_next = NULL; | |
580 | ||
581 | struct mei_device *dev = container_of(work, | |
a61c6530 | 582 | struct mei_device, timer_work.work); |
fb7d879f OW |
583 | |
584 | ||
585 | mutex_lock(&dev->device_lock); | |
66ae460b TW |
586 | |
587 | /* Catch interrupt stalls during HBM init handshake */ | |
588 | if (dev->dev_state == MEI_DEV_INIT_CLIENTS && | |
589 | dev->hbm_state != MEI_HBM_IDLE) { | |
590 | ||
591 | if (dev->init_clients_timer) { | |
592 | if (--dev->init_clients_timer == 0) { | |
593 | dev_err(&dev->pdev->dev, "timer: init clients timeout hbm_state = %d.\n", | |
594 | dev->hbm_state); | |
33ec0826 | 595 | mei_reset(dev); |
66ae460b | 596 | goto out; |
fb7d879f OW |
597 | } |
598 | } | |
fb7d879f | 599 | } |
66ae460b TW |
600 | |
601 | if (dev->dev_state != MEI_DEV_ENABLED) | |
602 | goto out; | |
603 | ||
fb7d879f | 604 | /*** connect/disconnect timeouts ***/ |
31f88f57 TW |
605 | list_for_each_entry(cl, &dev->file_list, link) { |
606 | if (cl->timer_count) { | |
607 | if (--cl->timer_count == 0) { | |
33ec0826 TW |
608 | dev_err(&dev->pdev->dev, "timer: connect/disconnect timeout.\n"); |
609 | mei_reset(dev); | |
fb7d879f OW |
610 | goto out; |
611 | } | |
612 | } | |
613 | } | |
614 | ||
64092858 TW |
615 | if (!mei_cl_is_connected(&dev->iamthif_cl)) |
616 | goto out; | |
617 | ||
fb7d879f OW |
618 | if (dev->iamthif_stall_timer) { |
619 | if (--dev->iamthif_stall_timer == 0) { | |
33ec0826 TW |
620 | dev_err(&dev->pdev->dev, "timer: amthif hanged.\n"); |
621 | mei_reset(dev); | |
fb7d879f OW |
622 | dev->iamthif_msg_buf_size = 0; |
623 | dev->iamthif_msg_buf_index = 0; | |
eb9af0ac TW |
624 | dev->iamthif_canceled = false; |
625 | dev->iamthif_ioctl = true; | |
fb7d879f OW |
626 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
627 | dev->iamthif_timer = 0; | |
628 | ||
601a1efa TW |
629 | mei_io_cb_free(dev->iamthif_current_cb); |
630 | dev->iamthif_current_cb = NULL; | |
fb7d879f OW |
631 | |
632 | dev->iamthif_file_object = NULL; | |
19838fb8 | 633 | mei_amthif_run_next_cmd(dev); |
fb7d879f OW |
634 | } |
635 | } | |
636 | ||
637 | if (dev->iamthif_timer) { | |
638 | ||
639 | timeout = dev->iamthif_timer + | |
3870c320 | 640 | mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER); |
fb7d879f OW |
641 | |
642 | dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n", | |
643 | dev->iamthif_timer); | |
644 | dev_dbg(&dev->pdev->dev, "timeout = %ld\n", timeout); | |
645 | dev_dbg(&dev->pdev->dev, "jiffies = %ld\n", jiffies); | |
646 | if (time_after(jiffies, timeout)) { | |
647 | /* | |
648 | * User didn't read the AMTHI data on time (15sec) | |
649 | * freeing AMTHI for other requests | |
650 | */ | |
651 | ||
652 | dev_dbg(&dev->pdev->dev, "freeing AMTHI for other requests\n"); | |
653 | ||
e773efc4 TW |
654 | list_for_each_entry_safe(cb_pos, cb_next, |
655 | &dev->amthif_rd_complete_list.list, list) { | |
fb7d879f | 656 | |
31f88f57 | 657 | cl = cb_pos->file_object->private_data; |
fb7d879f | 658 | |
b7cd2d9f | 659 | /* Finding the AMTHI entry. */ |
31f88f57 | 660 | if (cl == &dev->iamthif_cl) |
fb601adb | 661 | list_del(&cb_pos->list); |
fb7d879f | 662 | } |
601a1efa TW |
663 | mei_io_cb_free(dev->iamthif_current_cb); |
664 | dev->iamthif_current_cb = NULL; | |
fb7d879f OW |
665 | |
666 | dev->iamthif_file_object->private_data = NULL; | |
667 | dev->iamthif_file_object = NULL; | |
fb7d879f | 668 | dev->iamthif_timer = 0; |
19838fb8 | 669 | mei_amthif_run_next_cmd(dev); |
fb7d879f OW |
670 | |
671 | } | |
672 | } | |
673 | out: | |
33ec0826 TW |
674 | if (dev->dev_state != MEI_DEV_DISABLED) |
675 | schedule_delayed_work(&dev->timer_work, 2 * HZ); | |
441ab50f | 676 | mutex_unlock(&dev->device_lock); |
fb7d879f OW |
677 | } |
678 |