Commit | Line | Data |
---|---|---|
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 TW |
33 | /** |
34 | * mei_irq_compl_handler - dispatch complete handelers | |
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 | ||
fb7d879f | 163 | /** |
6220d6a0 TW |
164 | * mei_cl_irq_close - processes close related operation from |
165 | * interrupt thread context - send disconnect request | |
fb7d879f | 166 | * |
6220d6a0 TW |
167 | * @cl: client |
168 | * @cb: callback block. | |
fb7d879f | 169 | * @slots: free slots. |
fb7d879f OW |
170 | * @cmpl_list: complete list. |
171 | * | |
172 | * returns 0, OK; otherwise, error. | |
173 | */ | |
6220d6a0 TW |
174 | static int mei_cl_irq_close(struct mei_cl *cl, struct mei_cl_cb *cb, |
175 | s32 *slots, struct mei_cl_cb *cmpl_list) | |
fb7d879f | 176 | { |
6220d6a0 TW |
177 | struct mei_device *dev = cl->dev; |
178 | ||
c8c8d080 TW |
179 | u32 msg_slots = |
180 | mei_data2slots(sizeof(struct hbm_client_connect_request)); | |
fb7d879f | 181 | |
c8c8d080 TW |
182 | if (*slots < msg_slots) |
183 | return -EMSGSIZE; | |
184 | ||
185 | *slots -= msg_slots; | |
b45f3ccf | 186 | |
8120e720 | 187 | if (mei_hbm_cl_disconnect_req(dev, cl)) { |
b45f3ccf | 188 | cl->status = 0; |
6220d6a0 TW |
189 | cb->buf_idx = 0; |
190 | list_move_tail(&cb->list, &cmpl_list->list); | |
c8c8d080 | 191 | return -EIO; |
fb7d879f OW |
192 | } |
193 | ||
c8c8d080 TW |
194 | cl->state = MEI_FILE_DISCONNECTING; |
195 | cl->status = 0; | |
6220d6a0 TW |
196 | cb->buf_idx = 0; |
197 | list_move_tail(&cb->list, &dev->ctrl_rd_list.list); | |
c8c8d080 TW |
198 | cl->timer_count = MEI_CONNECT_TIMEOUT; |
199 | ||
fb7d879f OW |
200 | return 0; |
201 | } | |
202 | ||
fb7d879f OW |
203 | |
204 | /** | |
6220d6a0 TW |
205 | * mei_cl_irq_close - processes client read related operation from the |
206 | * interrupt thread context - request for flow control credits | |
fb7d879f | 207 | * |
6220d6a0 TW |
208 | * @cl: client |
209 | * @cb: callback block. | |
fb7d879f | 210 | * @slots: free slots. |
fb7d879f OW |
211 | * @cmpl_list: complete list. |
212 | * | |
213 | * returns 0, OK; otherwise, error. | |
214 | */ | |
6220d6a0 TW |
215 | static int mei_cl_irq_read(struct mei_cl *cl, struct mei_cl_cb *cb, |
216 | s32 *slots, struct mei_cl_cb *cmpl_list) | |
fb7d879f | 217 | { |
6220d6a0 | 218 | struct mei_device *dev = cl->dev; |
c8c8d080 TW |
219 | u32 msg_slots = mei_data2slots(sizeof(struct hbm_flow_control)); |
220 | ||
2ebf8c94 TW |
221 | int ret; |
222 | ||
223 | ||
c8c8d080 | 224 | if (*slots < msg_slots) { |
fb7d879f | 225 | /* return the cancel routine */ |
6220d6a0 | 226 | list_del(&cb->list); |
c8c8d080 | 227 | return -EMSGSIZE; |
fb7d879f OW |
228 | } |
229 | ||
c8c8d080 | 230 | *slots -= msg_slots; |
7bdf72d3 | 231 | |
2ebf8c94 TW |
232 | ret = mei_hbm_cl_flow_control_req(dev, cl); |
233 | if (ret) { | |
234 | cl->status = ret; | |
6220d6a0 TW |
235 | cb->buf_idx = 0; |
236 | list_move_tail(&cb->list, &cmpl_list->list); | |
2ebf8c94 | 237 | return ret; |
1ccb7b62 | 238 | } |
2ebf8c94 | 239 | |
6220d6a0 | 240 | list_move_tail(&cb->list, &dev->read_list.list); |
1ccb7b62 | 241 | |
fb7d879f OW |
242 | return 0; |
243 | } | |
244 | ||
245 | ||
246 | /** | |
6220d6a0 TW |
247 | * mei_cl_irq_ioctl - processes client ioctl related operation from the |
248 | * interrupt thread context - send connection request | |
fb7d879f | 249 | * |
6220d6a0 TW |
250 | * @cl: client |
251 | * @cb: callback block. | |
fb7d879f | 252 | * @slots: free slots. |
fb7d879f OW |
253 | * @cmpl_list: complete list. |
254 | * | |
255 | * returns 0, OK; otherwise, error. | |
256 | */ | |
6220d6a0 TW |
257 | static int mei_cl_irq_ioctl(struct mei_cl *cl, struct mei_cl_cb *cb, |
258 | s32 *slots, struct mei_cl_cb *cmpl_list) | |
fb7d879f | 259 | { |
6220d6a0 | 260 | struct mei_device *dev = cl->dev; |
2ebf8c94 | 261 | int ret; |
6220d6a0 | 262 | |
c8c8d080 TW |
263 | u32 msg_slots = |
264 | mei_data2slots(sizeof(struct hbm_client_connect_request)); | |
265 | ||
266 | if (*slots < msg_slots) { | |
fb7d879f | 267 | /* return the cancel routine */ |
6220d6a0 | 268 | list_del(&cb->list); |
c8c8d080 | 269 | return -EMSGSIZE; |
fb7d879f OW |
270 | } |
271 | ||
c8c8d080 TW |
272 | *slots -= msg_slots; |
273 | ||
b45f3ccf | 274 | cl->state = MEI_FILE_CONNECTING; |
c8c8d080 | 275 | |
2ebf8c94 TW |
276 | ret = mei_hbm_cl_connect_req(dev, cl); |
277 | if (ret) { | |
278 | cl->status = ret; | |
6220d6a0 TW |
279 | cb->buf_idx = 0; |
280 | list_del(&cb->list); | |
2ebf8c94 | 281 | return ret; |
b45f3ccf | 282 | } |
6220d6a0 TW |
283 | |
284 | list_move_tail(&cb->list, &dev->ctrl_rd_list.list); | |
285 | cl->timer_count = MEI_CONNECT_TIMEOUT; | |
fb7d879f OW |
286 | return 0; |
287 | } | |
288 | ||
fb7d879f | 289 | |
fb7d879f | 290 | /** |
393b148f | 291 | * mei_irq_read_handler - bottom half read routine after ISR to |
fb7d879f OW |
292 | * handle the read processing. |
293 | * | |
fb7d879f | 294 | * @dev: the device structure |
06ecd645 | 295 | * @cmpl_list: An instance of our list structure |
fb7d879f OW |
296 | * @slots: slots to read. |
297 | * | |
298 | * returns 0 on success, <0 on failure. | |
299 | */ | |
06ecd645 TW |
300 | int mei_irq_read_handler(struct mei_device *dev, |
301 | struct mei_cl_cb *cmpl_list, s32 *slots) | |
fb7d879f OW |
302 | { |
303 | struct mei_msg_hdr *mei_hdr; | |
10ee9074 TW |
304 | struct mei_cl *cl; |
305 | int ret; | |
fb7d879f OW |
306 | |
307 | if (!dev->rd_msg_hdr) { | |
827eef51 | 308 | dev->rd_msg_hdr = mei_read_hdr(dev); |
fb7d879f OW |
309 | (*slots)--; |
310 | dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots); | |
311 | } | |
312 | mei_hdr = (struct mei_msg_hdr *) &dev->rd_msg_hdr; | |
15d4acc5 | 313 | dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr)); |
fb7d879f OW |
314 | |
315 | if (mei_hdr->reserved || !dev->rd_msg_hdr) { | |
10ee9074 TW |
316 | dev_err(&dev->pdev->dev, "corrupted message header 0x%08X\n", |
317 | dev->rd_msg_hdr); | |
fb7d879f OW |
318 | ret = -EBADMSG; |
319 | goto end; | |
320 | } | |
321 | ||
10ee9074 TW |
322 | if (mei_slots2data(*slots) < mei_hdr->length) { |
323 | dev_err(&dev->pdev->dev, "less data available than length=%08x.\n", | |
fb7d879f OW |
324 | *slots); |
325 | /* we can't read the message */ | |
326 | ret = -ERANGE; | |
327 | goto end; | |
328 | } | |
329 | ||
10ee9074 TW |
330 | /* HBM message */ |
331 | if (mei_hdr->host_addr == 0 && mei_hdr->me_addr == 0) { | |
bb1b0133 | 332 | mei_hbm_dispatch(dev, mei_hdr); |
10ee9074 TW |
333 | ret = 0; |
334 | dev_dbg(&dev->pdev->dev, "mei_hbm_dispatch.\n"); | |
335 | goto reset_slots; | |
336 | } | |
15d4acc5 | 337 | |
10ee9074 TW |
338 | /* find recepient cl */ |
339 | list_for_each_entry(cl, &dev->file_list, link) { | |
340 | if (mei_cl_hbm_equal(cl, mei_hdr)) { | |
341 | cl_dbg(dev, cl, "got a message\n"); | |
342 | break; | |
343 | } | |
344 | } | |
345 | ||
346 | /* if no recepient cl was found we assume corrupted header\n */ | |
347 | if (&cl->link == &dev->file_list) { | |
348 | dev_err(&dev->pdev->dev, "no destination client found 0x%08X\n", | |
349 | dev->rd_msg_hdr); | |
350 | ret = -EBADMSG; | |
351 | goto end; | |
352 | } | |
353 | ||
354 | if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id && | |
355 | MEI_FILE_CONNECTED == dev->iamthif_cl.state && | |
356 | dev->iamthif_state == MEI_IAMTHIF_READING) { | |
19838fb8 | 357 | |
5ceb46e2 | 358 | ret = mei_amthif_irq_read_msg(dev, mei_hdr, cmpl_list); |
10ee9074 TW |
359 | if (ret) { |
360 | dev_err(&dev->pdev->dev, "mei_amthif_irq_read_msg failed = %d\n", | |
361 | ret); | |
fb7d879f | 362 | goto end; |
10ee9074 | 363 | } |
fb7d879f | 364 | } else { |
6e0f180f | 365 | ret = mei_cl_irq_read_msg(dev, mei_hdr, cmpl_list); |
10ee9074 TW |
366 | if (ret) { |
367 | dev_err(&dev->pdev->dev, "mei_cl_irq_read_msg failed = %d\n", | |
368 | ret); | |
fb7d879f | 369 | goto end; |
10ee9074 | 370 | } |
fb7d879f OW |
371 | } |
372 | ||
10ee9074 | 373 | reset_slots: |
fb7d879f OW |
374 | /* reset the number of slots and header */ |
375 | *slots = mei_count_full_read_slots(dev); | |
376 | dev->rd_msg_hdr = 0; | |
377 | ||
378 | if (*slots == -EOVERFLOW) { | |
379 | /* overflow - reset */ | |
6e0f180f | 380 | dev_err(&dev->pdev->dev, "resetting due to slots overflow.\n"); |
fb7d879f OW |
381 | /* set the event since message has been read */ |
382 | ret = -ERANGE; | |
383 | goto end; | |
384 | } | |
385 | end: | |
386 | return ret; | |
387 | } | |
40e0b67b | 388 | EXPORT_SYMBOL_GPL(mei_irq_read_handler); |
fb7d879f OW |
389 | |
390 | ||
391 | /** | |
06ecd645 TW |
392 | * mei_irq_write_handler - dispatch write requests |
393 | * after irq received | |
fb7d879f | 394 | * |
fb7d879f | 395 | * @dev: the device structure |
9a84d616 | 396 | * @cmpl_list: An instance of our list structure |
fb7d879f OW |
397 | * |
398 | * returns 0 on success, <0 on failure. | |
399 | */ | |
c8c8d080 | 400 | int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) |
fb7d879f OW |
401 | { |
402 | ||
403 | struct mei_cl *cl; | |
6220d6a0 | 404 | struct mei_cl_cb *cb, *next; |
fb601adb | 405 | struct mei_cl_cb *list; |
9a84d616 | 406 | s32 slots; |
fb7d879f OW |
407 | int ret; |
408 | ||
827eef51 | 409 | if (!mei_hbuf_is_ready(dev)) { |
fb7d879f OW |
410 | dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n"); |
411 | return 0; | |
412 | } | |
9a84d616 TW |
413 | slots = mei_hbuf_empty_slots(dev); |
414 | if (slots <= 0) | |
7d5e0e59 TW |
415 | return -EMSGSIZE; |
416 | ||
fb7d879f OW |
417 | /* complete all waiting for write CB */ |
418 | dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n"); | |
419 | ||
420 | list = &dev->write_waiting_list; | |
6220d6a0 TW |
421 | list_for_each_entry_safe(cb, next, &list->list, list) { |
422 | cl = cb->cl; | |
b7cd2d9f TW |
423 | if (cl == NULL) |
424 | continue; | |
425 | ||
426 | cl->status = 0; | |
6220d6a0 | 427 | list_del(&cb->list); |
b7cd2d9f | 428 | if (MEI_WRITING == cl->writing_state && |
6220d6a0 | 429 | cb->fop_type == MEI_FOP_WRITE && |
4b8960b4 | 430 | cl != &dev->iamthif_cl) { |
c0abffbd | 431 | cl_dbg(dev, cl, "MEI WRITE COMPLETE\n"); |
b7cd2d9f | 432 | cl->writing_state = MEI_WRITE_COMPLETE; |
6220d6a0 | 433 | list_add_tail(&cb->list, &cmpl_list->list); |
b7cd2d9f TW |
434 | } |
435 | if (cl == &dev->iamthif_cl) { | |
c0abffbd | 436 | cl_dbg(dev, cl, "check iamthif flow control.\n"); |
b7cd2d9f | 437 | if (dev->iamthif_flow_control_pending) { |
9a84d616 | 438 | ret = mei_amthif_irq_read(dev, &slots); |
b7cd2d9f TW |
439 | if (ret) |
440 | return ret; | |
fb7d879f | 441 | } |
fb7d879f OW |
442 | } |
443 | } | |
444 | ||
c216fdeb TW |
445 | if (dev->wd_state == MEI_WD_STOPPING) { |
446 | dev->wd_state = MEI_WD_IDLE; | |
fb7d879f | 447 | wake_up_interruptible(&dev->wait_stop_wd); |
fb7d879f OW |
448 | } |
449 | ||
5fb54fb4 TW |
450 | if (dev->wr_ext_msg.hdr.length) { |
451 | mei_write_message(dev, &dev->wr_ext_msg.hdr, | |
438763f3 | 452 | dev->wr_ext_msg.data); |
9a84d616 | 453 | slots -= mei_data2slots(dev->wr_ext_msg.hdr.length); |
5fb54fb4 | 454 | dev->wr_ext_msg.hdr.length = 0; |
fb7d879f | 455 | } |
b210d750 | 456 | if (dev->dev_state == MEI_DEV_ENABLED) { |
fb7d879f | 457 | if (dev->wd_pending && |
90e0b5f1 | 458 | mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) { |
fb7d879f OW |
459 | if (mei_wd_send(dev)) |
460 | dev_dbg(&dev->pdev->dev, "wd send failed.\n"); | |
90e0b5f1 | 461 | else if (mei_cl_flow_ctrl_reduce(&dev->wd_cl)) |
483136ea | 462 | return -ENODEV; |
fb7d879f | 463 | |
eb9af0ac | 464 | dev->wd_pending = false; |
fb7d879f | 465 | |
c216fdeb | 466 | if (dev->wd_state == MEI_WD_RUNNING) |
9a84d616 | 467 | slots -= mei_data2slots(MEI_WD_START_MSG_SIZE); |
d242a0af | 468 | else |
9a84d616 | 469 | slots -= mei_data2slots(MEI_WD_STOP_MSG_SIZE); |
fb7d879f OW |
470 | } |
471 | } | |
fb7d879f OW |
472 | |
473 | /* complete control write list CB */ | |
c8372094 | 474 | dev_dbg(&dev->pdev->dev, "complete control write list cb.\n"); |
6220d6a0 TW |
475 | list_for_each_entry_safe(cb, next, &dev->ctrl_wr_list.list, list) { |
476 | cl = cb->cl; | |
c8372094 | 477 | if (!cl) { |
6220d6a0 | 478 | list_del(&cb->list); |
c8372094 TW |
479 | return -ENODEV; |
480 | } | |
6220d6a0 | 481 | switch (cb->fop_type) { |
4b8960b4 | 482 | case MEI_FOP_CLOSE: |
c8372094 | 483 | /* send disconnect message */ |
6220d6a0 | 484 | ret = mei_cl_irq_close(cl, cb, &slots, cmpl_list); |
c8372094 TW |
485 | if (ret) |
486 | return ret; | |
fb7d879f | 487 | |
c8372094 | 488 | break; |
4b8960b4 | 489 | case MEI_FOP_READ: |
c8372094 | 490 | /* send flow control message */ |
6220d6a0 | 491 | ret = mei_cl_irq_read(cl, cb, &slots, cmpl_list); |
c8372094 TW |
492 | if (ret) |
493 | return ret; | |
fb7d879f | 494 | |
c8372094 | 495 | break; |
4b8960b4 | 496 | case MEI_FOP_IOCTL: |
c8372094 | 497 | /* connect message */ |
90e0b5f1 | 498 | if (mei_cl_is_other_connecting(cl)) |
c8372094 | 499 | continue; |
6220d6a0 | 500 | ret = mei_cl_irq_ioctl(cl, cb, &slots, cmpl_list); |
c8372094 TW |
501 | if (ret) |
502 | return ret; | |
fb7d879f | 503 | |
c8372094 | 504 | break; |
fb7d879f | 505 | |
c8372094 TW |
506 | default: |
507 | BUG(); | |
fb7d879f | 508 | } |
c8372094 | 509 | |
fb7d879f OW |
510 | } |
511 | /* complete write list CB */ | |
b7cd2d9f | 512 | dev_dbg(&dev->pdev->dev, "complete write list cb.\n"); |
6220d6a0 TW |
513 | list_for_each_entry_safe(cb, next, &dev->write_list.list, list) { |
514 | cl = cb->cl; | |
b7cd2d9f TW |
515 | if (cl == NULL) |
516 | continue; | |
be9d87a7 | 517 | if (cl == &dev->iamthif_cl) |
6220d6a0 TW |
518 | ret = mei_amthif_irq_write_complete(cl, cb, |
519 | &slots, cmpl_list); | |
be9d87a7 | 520 | else |
6220d6a0 TW |
521 | ret = mei_cl_irq_write_complete(cl, cb, |
522 | &slots, cmpl_list); | |
be9d87a7 TW |
523 | if (ret) |
524 | return ret; | |
fb7d879f OW |
525 | } |
526 | return 0; | |
527 | } | |
40e0b67b | 528 | EXPORT_SYMBOL_GPL(mei_irq_write_handler); |
fb7d879f OW |
529 | |
530 | ||
531 | ||
532 | /** | |
533 | * mei_timer - timer function. | |
534 | * | |
535 | * @work: pointer to the work_struct structure | |
536 | * | |
537 | * NOTE: This function is called by timer interrupt work | |
538 | */ | |
a61c6530 | 539 | void mei_timer(struct work_struct *work) |
fb7d879f OW |
540 | { |
541 | unsigned long timeout; | |
542 | struct mei_cl *cl_pos = NULL; | |
543 | struct mei_cl *cl_next = NULL; | |
fb7d879f OW |
544 | struct mei_cl_cb *cb_pos = NULL; |
545 | struct mei_cl_cb *cb_next = NULL; | |
546 | ||
547 | struct mei_device *dev = container_of(work, | |
a61c6530 | 548 | struct mei_device, timer_work.work); |
fb7d879f OW |
549 | |
550 | ||
551 | mutex_lock(&dev->device_lock); | |
b210d750 TW |
552 | if (dev->dev_state != MEI_DEV_ENABLED) { |
553 | if (dev->dev_state == MEI_DEV_INIT_CLIENTS) { | |
fb7d879f OW |
554 | if (dev->init_clients_timer) { |
555 | if (--dev->init_clients_timer == 0) { | |
9b0d5efc TW |
556 | dev_err(&dev->pdev->dev, "reset: init clients timeout hbm_state = %d.\n", |
557 | dev->hbm_state); | |
fb7d879f OW |
558 | mei_reset(dev, 1); |
559 | } | |
560 | } | |
561 | } | |
562 | goto out; | |
563 | } | |
564 | /*** connect/disconnect timeouts ***/ | |
565 | list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { | |
566 | if (cl_pos->timer_count) { | |
567 | if (--cl_pos->timer_count == 0) { | |
d6c36a47 | 568 | dev_err(&dev->pdev->dev, "reset: connect/disconnect timeout.\n"); |
fb7d879f OW |
569 | mei_reset(dev, 1); |
570 | goto out; | |
571 | } | |
572 | } | |
573 | } | |
574 | ||
fb7d879f OW |
575 | if (dev->iamthif_stall_timer) { |
576 | if (--dev->iamthif_stall_timer == 0) { | |
d6c36a47 | 577 | dev_err(&dev->pdev->dev, "reset: amthif hanged.\n"); |
fb7d879f OW |
578 | mei_reset(dev, 1); |
579 | dev->iamthif_msg_buf_size = 0; | |
580 | dev->iamthif_msg_buf_index = 0; | |
eb9af0ac TW |
581 | dev->iamthif_canceled = false; |
582 | dev->iamthif_ioctl = true; | |
fb7d879f OW |
583 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
584 | dev->iamthif_timer = 0; | |
585 | ||
601a1efa TW |
586 | mei_io_cb_free(dev->iamthif_current_cb); |
587 | dev->iamthif_current_cb = NULL; | |
fb7d879f OW |
588 | |
589 | dev->iamthif_file_object = NULL; | |
19838fb8 | 590 | mei_amthif_run_next_cmd(dev); |
fb7d879f OW |
591 | } |
592 | } | |
593 | ||
594 | if (dev->iamthif_timer) { | |
595 | ||
596 | timeout = dev->iamthif_timer + | |
3870c320 | 597 | mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER); |
fb7d879f OW |
598 | |
599 | dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n", | |
600 | dev->iamthif_timer); | |
601 | dev_dbg(&dev->pdev->dev, "timeout = %ld\n", timeout); | |
602 | dev_dbg(&dev->pdev->dev, "jiffies = %ld\n", jiffies); | |
603 | if (time_after(jiffies, timeout)) { | |
604 | /* | |
605 | * User didn't read the AMTHI data on time (15sec) | |
606 | * freeing AMTHI for other requests | |
607 | */ | |
608 | ||
609 | dev_dbg(&dev->pdev->dev, "freeing AMTHI for other requests\n"); | |
610 | ||
e773efc4 TW |
611 | list_for_each_entry_safe(cb_pos, cb_next, |
612 | &dev->amthif_rd_complete_list.list, list) { | |
fb7d879f | 613 | |
b7cd2d9f | 614 | cl_pos = cb_pos->file_object->private_data; |
fb7d879f | 615 | |
b7cd2d9f TW |
616 | /* Finding the AMTHI entry. */ |
617 | if (cl_pos == &dev->iamthif_cl) | |
fb601adb | 618 | list_del(&cb_pos->list); |
fb7d879f | 619 | } |
601a1efa TW |
620 | mei_io_cb_free(dev->iamthif_current_cb); |
621 | dev->iamthif_current_cb = NULL; | |
fb7d879f OW |
622 | |
623 | dev->iamthif_file_object->private_data = NULL; | |
624 | dev->iamthif_file_object = NULL; | |
fb7d879f | 625 | dev->iamthif_timer = 0; |
19838fb8 | 626 | mei_amthif_run_next_cmd(dev); |
fb7d879f OW |
627 | |
628 | } | |
629 | } | |
630 | out: | |
441ab50f TW |
631 | schedule_delayed_work(&dev->timer_work, 2 * HZ); |
632 | mutex_unlock(&dev->device_lock); | |
fb7d879f OW |
633 | } |
634 |