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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 | ||
18 | #include <linux/pci.h> | |
19 | #include <linux/kthread.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/jiffies.h> | |
23 | ||
24 | #include "mei_dev.h" | |
25 | #include "mei.h" | |
26 | #include "hw.h" | |
27 | #include "interface.h" | |
28 | ||
29 | ||
30 | /** | |
31 | * mei_interrupt_quick_handler - The ISR of the MEI device | |
32 | * | |
33 | * @irq: The irq number | |
34 | * @dev_id: pointer to the device structure | |
35 | * | |
36 | * returns irqreturn_t | |
37 | */ | |
38 | irqreturn_t mei_interrupt_quick_handler(int irq, void *dev_id) | |
39 | { | |
40 | struct mei_device *dev = (struct mei_device *) dev_id; | |
41 | u32 csr_reg = mei_hcsr_read(dev); | |
42 | ||
43 | if ((csr_reg & H_IS) != H_IS) | |
44 | return IRQ_NONE; | |
45 | ||
46 | /* clear H_IS bit in H_CSR */ | |
47 | mei_reg_write(dev, H_CSR, csr_reg); | |
48 | ||
49 | return IRQ_WAKE_THREAD; | |
50 | } | |
51 | ||
52 | /** | |
53 | * _mei_cmpl - processes completed operation. | |
54 | * | |
55 | * @cl: private data of the file object. | |
56 | * @cb_pos: callback block. | |
57 | */ | |
58 | static void _mei_cmpl(struct mei_cl *cl, struct mei_cl_cb *cb_pos) | |
59 | { | |
60 | if (cb_pos->major_file_operations == MEI_WRITE) { | |
61 | mei_free_cb_private(cb_pos); | |
62 | cb_pos = NULL; | |
63 | cl->writing_state = MEI_WRITE_COMPLETE; | |
64 | if (waitqueue_active(&cl->tx_wait)) | |
65 | wake_up_interruptible(&cl->tx_wait); | |
66 | ||
67 | } else if (cb_pos->major_file_operations == MEI_READ && | |
68 | MEI_READING == cl->reading_state) { | |
69 | cl->reading_state = MEI_READ_COMPLETE; | |
70 | if (waitqueue_active(&cl->rx_wait)) | |
71 | wake_up_interruptible(&cl->rx_wait); | |
72 | ||
73 | } | |
74 | } | |
75 | ||
76 | /** | |
77 | * _mei_cmpl_iamthif - processes completed iamthif operation. | |
78 | * | |
79 | * @dev: the device structure. | |
80 | * @cb_pos: callback block. | |
81 | */ | |
82 | static void _mei_cmpl_iamthif(struct mei_device *dev, struct mei_cl_cb *cb_pos) | |
83 | { | |
84 | if (dev->iamthif_canceled != 1) { | |
85 | dev->iamthif_state = MEI_IAMTHIF_READ_COMPLETE; | |
86 | dev->iamthif_stall_timer = 0; | |
87 | memcpy(cb_pos->response_buffer.data, | |
88 | dev->iamthif_msg_buf, | |
89 | dev->iamthif_msg_buf_index); | |
90 | list_add_tail(&cb_pos->cb_list, | |
91 | &dev->amthi_read_complete_list.mei_cb.cb_list); | |
92 | dev_dbg(&dev->pdev->dev, "amthi read completed.\n"); | |
93 | dev->iamthif_timer = jiffies; | |
94 | dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n", | |
95 | dev->iamthif_timer); | |
96 | } else { | |
c95efb74 | 97 | mei_run_next_iamthif_cmd(dev); |
fb7d879f OW |
98 | } |
99 | ||
100 | dev_dbg(&dev->pdev->dev, "completing amthi call back.\n"); | |
101 | wake_up_interruptible(&dev->iamthif_cl.wait); | |
102 | } | |
103 | ||
104 | ||
105 | /** | |
106 | * mei_irq_thread_read_amthi_message - bottom half read routine after ISR to | |
107 | * handle the read amthi message data processing. | |
108 | * | |
109 | * @complete_list: An instance of our list structure | |
110 | * @dev: the device structure | |
111 | * @mei_hdr: header of amthi message | |
112 | * | |
113 | * returns 0 on success, <0 on failure. | |
114 | */ | |
115 | static int mei_irq_thread_read_amthi_message(struct mei_io_list *complete_list, | |
116 | struct mei_device *dev, | |
117 | struct mei_msg_hdr *mei_hdr) | |
118 | { | |
119 | struct mei_cl *cl; | |
120 | struct mei_cl_cb *cb; | |
121 | unsigned char *buffer; | |
122 | ||
123 | BUG_ON(mei_hdr->me_addr != dev->iamthif_cl.me_client_id); | |
124 | BUG_ON(dev->iamthif_state != MEI_IAMTHIF_READING); | |
125 | ||
edf1eed4 | 126 | buffer = dev->iamthif_msg_buf + dev->iamthif_msg_buf_index; |
fb7d879f OW |
127 | BUG_ON(dev->iamthif_mtu < dev->iamthif_msg_buf_index + mei_hdr->length); |
128 | ||
129 | mei_read_slots(dev, buffer, mei_hdr->length); | |
130 | ||
131 | dev->iamthif_msg_buf_index += mei_hdr->length; | |
132 | ||
133 | if (!mei_hdr->msg_complete) | |
134 | return 0; | |
135 | ||
136 | dev_dbg(&dev->pdev->dev, | |
137 | "amthi_message_buffer_index =%d\n", | |
138 | mei_hdr->length); | |
139 | ||
140 | dev_dbg(&dev->pdev->dev, "completed amthi read.\n "); | |
141 | if (!dev->iamthif_current_cb) | |
142 | return -ENODEV; | |
143 | ||
144 | cb = dev->iamthif_current_cb; | |
145 | dev->iamthif_current_cb = NULL; | |
146 | ||
147 | cl = (struct mei_cl *)cb->file_private; | |
148 | if (!cl) | |
149 | return -ENODEV; | |
150 | ||
151 | dev->iamthif_stall_timer = 0; | |
152 | cb->information = dev->iamthif_msg_buf_index; | |
153 | cb->read_time = jiffies; | |
154 | if (dev->iamthif_ioctl && cl == &dev->iamthif_cl) { | |
155 | /* found the iamthif cb */ | |
156 | dev_dbg(&dev->pdev->dev, "complete the amthi read cb.\n "); | |
157 | dev_dbg(&dev->pdev->dev, "add the amthi read cb to complete.\n "); | |
158 | list_add_tail(&cb->cb_list, | |
159 | &complete_list->mei_cb.cb_list); | |
160 | } | |
161 | return 0; | |
162 | } | |
163 | ||
164 | /** | |
165 | * _mei_irq_thread_state_ok - checks if mei header matches file private data | |
166 | * | |
167 | * @cl: private data of the file object | |
168 | * @mei_hdr: header of mei client message | |
169 | * | |
170 | * returns !=0 if matches, 0 if no match. | |
171 | */ | |
172 | static int _mei_irq_thread_state_ok(struct mei_cl *cl, | |
173 | struct mei_msg_hdr *mei_hdr) | |
174 | { | |
175 | return (cl->host_client_id == mei_hdr->host_addr && | |
176 | cl->me_client_id == mei_hdr->me_addr && | |
177 | cl->state == MEI_FILE_CONNECTED && | |
178 | MEI_READ_COMPLETE != cl->reading_state); | |
179 | } | |
180 | ||
181 | /** | |
182 | * mei_irq_thread_read_client_message - bottom half read routine after ISR to | |
183 | * handle the read mei client message data processing. | |
184 | * | |
185 | * @complete_list: An instance of our list structure | |
186 | * @dev: the device structure | |
187 | * @mei_hdr: header of mei client message | |
188 | * | |
189 | * returns 0 on success, <0 on failure. | |
190 | */ | |
191 | static int mei_irq_thread_read_client_message(struct mei_io_list *complete_list, | |
192 | struct mei_device *dev, | |
193 | struct mei_msg_hdr *mei_hdr) | |
194 | { | |
195 | struct mei_cl *cl; | |
196 | struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; | |
479bc59d | 197 | unsigned char *buffer = NULL; |
fb7d879f OW |
198 | |
199 | dev_dbg(&dev->pdev->dev, "start client msg\n"); | |
c8372094 | 200 | if (list_empty(&dev->read_list.mei_cb.cb_list)) |
fb7d879f OW |
201 | goto quit; |
202 | ||
203 | list_for_each_entry_safe(cb_pos, cb_next, | |
204 | &dev->read_list.mei_cb.cb_list, cb_list) { | |
205 | cl = (struct mei_cl *)cb_pos->file_private; | |
206 | if (cl && _mei_irq_thread_state_ok(cl, mei_hdr)) { | |
207 | cl->reading_state = MEI_READING; | |
edf1eed4 | 208 | buffer = cb_pos->response_buffer.data + cb_pos->information; |
fb7d879f OW |
209 | |
210 | if (cb_pos->response_buffer.size < | |
211 | mei_hdr->length + cb_pos->information) { | |
212 | dev_dbg(&dev->pdev->dev, "message overflow.\n"); | |
213 | list_del(&cb_pos->cb_list); | |
214 | return -ENOMEM; | |
215 | } | |
216 | if (buffer) | |
217 | mei_read_slots(dev, buffer, mei_hdr->length); | |
218 | ||
219 | cb_pos->information += mei_hdr->length; | |
220 | if (mei_hdr->msg_complete) { | |
221 | cl->status = 0; | |
222 | list_del(&cb_pos->cb_list); | |
223 | dev_dbg(&dev->pdev->dev, | |
224 | "completed read host client = %d," | |
225 | "ME client = %d, " | |
226 | "data length = %lu\n", | |
227 | cl->host_client_id, | |
228 | cl->me_client_id, | |
229 | cb_pos->information); | |
230 | ||
231 | *(cb_pos->response_buffer.data + | |
232 | cb_pos->information) = '\0'; | |
233 | dev_dbg(&dev->pdev->dev, "cb_pos->res_buffer - %s\n", | |
234 | cb_pos->response_buffer.data); | |
235 | list_add_tail(&cb_pos->cb_list, | |
236 | &complete_list->mei_cb.cb_list); | |
237 | } | |
238 | ||
239 | break; | |
240 | } | |
241 | ||
242 | } | |
243 | ||
244 | quit: | |
245 | dev_dbg(&dev->pdev->dev, "message read\n"); | |
246 | if (!buffer) { | |
edf1eed4 | 247 | mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length); |
fb7d879f OW |
248 | dev_dbg(&dev->pdev->dev, "discarding message, header =%08x.\n", |
249 | *(u32 *) dev->rd_msg_buf); | |
250 | } | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | /** | |
256 | * _mei_irq_thread_iamthif_read - prepares to read iamthif data. | |
257 | * | |
258 | * @dev: the device structure. | |
259 | * @slots: free slots. | |
260 | * | |
261 | * returns 0, OK; otherwise, error. | |
262 | */ | |
263 | static int _mei_irq_thread_iamthif_read(struct mei_device *dev, s32 *slots) | |
264 | { | |
265 | ||
266 | if (((*slots) * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) | |
267 | + sizeof(struct hbm_flow_control))) { | |
268 | *slots -= (sizeof(struct mei_msg_hdr) + | |
269 | sizeof(struct hbm_flow_control) + 3) / 4; | |
270 | if (!mei_send_flow_control(dev, &dev->iamthif_cl)) { | |
271 | dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n"); | |
272 | } else { | |
273 | dev_dbg(&dev->pdev->dev, "iamthif flow control success\n"); | |
274 | dev->iamthif_state = MEI_IAMTHIF_READING; | |
eb9af0ac | 275 | dev->iamthif_flow_control_pending = false; |
fb7d879f OW |
276 | dev->iamthif_msg_buf_index = 0; |
277 | dev->iamthif_msg_buf_size = 0; | |
278 | dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER; | |
279 | dev->mei_host_buffer_is_empty = | |
280 | mei_host_buffer_is_empty(dev); | |
281 | } | |
282 | return 0; | |
283 | } else { | |
284 | return -EMSGSIZE; | |
285 | } | |
286 | } | |
287 | ||
288 | /** | |
289 | * _mei_irq_thread_close - processes close related operation. | |
290 | * | |
291 | * @dev: the device structure. | |
292 | * @slots: free slots. | |
293 | * @cb_pos: callback block. | |
294 | * @cl: private data of the file object. | |
295 | * @cmpl_list: complete list. | |
296 | * | |
297 | * returns 0, OK; otherwise, error. | |
298 | */ | |
299 | static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots, | |
300 | struct mei_cl_cb *cb_pos, | |
301 | struct mei_cl *cl, | |
302 | struct mei_io_list *cmpl_list) | |
303 | { | |
304 | if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) + | |
305 | sizeof(struct hbm_client_disconnect_request))) { | |
306 | *slots -= (sizeof(struct mei_msg_hdr) + | |
307 | sizeof(struct hbm_client_disconnect_request) + 3) / 4; | |
308 | ||
309 | if (!mei_disconnect(dev, cl)) { | |
310 | cl->status = 0; | |
311 | cb_pos->information = 0; | |
312 | list_move_tail(&cb_pos->cb_list, | |
313 | &cmpl_list->mei_cb.cb_list); | |
314 | return -EMSGSIZE; | |
315 | } else { | |
316 | cl->state = MEI_FILE_DISCONNECTING; | |
317 | cl->status = 0; | |
318 | cb_pos->information = 0; | |
319 | list_move_tail(&cb_pos->cb_list, | |
320 | &dev->ctrl_rd_list.mei_cb.cb_list); | |
321 | cl->timer_count = MEI_CONNECT_TIMEOUT; | |
322 | } | |
323 | } else { | |
324 | /* return the cancel routine */ | |
325 | return -EBADMSG; | |
326 | } | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
331 | /** | |
332 | * is_treat_specially_client - checks if the message belongs | |
333 | * to the file private data. | |
334 | * | |
335 | * @cl: private data of the file object | |
336 | * @rs: connect response bus message | |
337 | * | |
338 | */ | |
339 | static bool is_treat_specially_client(struct mei_cl *cl, | |
340 | struct hbm_client_connect_response *rs) | |
341 | { | |
342 | ||
343 | if (cl->host_client_id == rs->host_addr && | |
344 | cl->me_client_id == rs->me_addr) { | |
345 | if (!rs->status) { | |
346 | cl->state = MEI_FILE_CONNECTED; | |
347 | cl->status = 0; | |
348 | ||
349 | } else { | |
350 | cl->state = MEI_FILE_DISCONNECTED; | |
351 | cl->status = -ENODEV; | |
352 | } | |
353 | cl->timer_count = 0; | |
354 | ||
355 | return true; | |
356 | } | |
357 | return false; | |
358 | } | |
359 | ||
360 | /** | |
361 | * mei_client_connect_response - connects to response irq routine | |
362 | * | |
363 | * @dev: the device structure | |
364 | * @rs: connect response bus message | |
365 | */ | |
366 | static void mei_client_connect_response(struct mei_device *dev, | |
367 | struct hbm_client_connect_response *rs) | |
368 | { | |
369 | ||
370 | struct mei_cl *cl; | |
371 | struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; | |
372 | ||
373 | dev_dbg(&dev->pdev->dev, | |
374 | "connect_response:\n" | |
375 | "ME Client = %d\n" | |
376 | "Host Client = %d\n" | |
377 | "Status = %d\n", | |
378 | rs->me_addr, | |
379 | rs->host_addr, | |
380 | rs->status); | |
381 | ||
382 | /* if WD or iamthif client treat specially */ | |
383 | ||
384 | if (is_treat_specially_client(&(dev->wd_cl), rs)) { | |
fb7d879f | 385 | dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n"); |
70cd5337 | 386 | mei_watchdog_register(dev); |
9ce178e5 | 387 | |
70cd5337 | 388 | /* next step in the state maching */ |
c95efb74 | 389 | mei_host_init_iamthif(dev); |
fb7d879f OW |
390 | return; |
391 | } | |
392 | ||
393 | if (is_treat_specially_client(&(dev->iamthif_cl), rs)) { | |
394 | dev->iamthif_state = MEI_IAMTHIF_IDLE; | |
395 | return; | |
396 | } | |
b7cd2d9f TW |
397 | list_for_each_entry_safe(cb_pos, cb_next, |
398 | &dev->ctrl_rd_list.mei_cb.cb_list, cb_list) { | |
399 | ||
400 | cl = (struct mei_cl *)cb_pos->file_private; | |
401 | if (!cl) { | |
402 | list_del(&cb_pos->cb_list); | |
403 | return; | |
404 | } | |
405 | if (MEI_IOCTL == cb_pos->major_file_operations) { | |
406 | if (is_treat_specially_client(cl, rs)) { | |
fb7d879f | 407 | list_del(&cb_pos->cb_list); |
b7cd2d9f TW |
408 | cl->status = 0; |
409 | cl->timer_count = 0; | |
410 | break; | |
fb7d879f OW |
411 | } |
412 | } | |
413 | } | |
414 | } | |
415 | ||
416 | /** | |
417 | * mei_client_disconnect_response - disconnects from response irq routine | |
418 | * | |
419 | * @dev: the device structure | |
420 | * @rs: disconnect response bus message | |
421 | */ | |
422 | static void mei_client_disconnect_response(struct mei_device *dev, | |
423 | struct hbm_client_connect_response *rs) | |
424 | { | |
425 | struct mei_cl *cl; | |
426 | struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; | |
427 | ||
428 | dev_dbg(&dev->pdev->dev, | |
429 | "disconnect_response:\n" | |
430 | "ME Client = %d\n" | |
431 | "Host Client = %d\n" | |
432 | "Status = %d\n", | |
433 | rs->me_addr, | |
434 | rs->host_addr, | |
435 | rs->status); | |
436 | ||
b7cd2d9f TW |
437 | list_for_each_entry_safe(cb_pos, cb_next, |
438 | &dev->ctrl_rd_list.mei_cb.cb_list, cb_list) { | |
439 | cl = (struct mei_cl *)cb_pos->file_private; | |
fb7d879f | 440 | |
b7cd2d9f TW |
441 | if (!cl) { |
442 | list_del(&cb_pos->cb_list); | |
443 | return; | |
444 | } | |
fb7d879f | 445 | |
b7cd2d9f TW |
446 | dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n"); |
447 | if (cl->host_client_id == rs->host_addr && | |
448 | cl->me_client_id == rs->me_addr) { | |
fb7d879f | 449 | |
b7cd2d9f TW |
450 | list_del(&cb_pos->cb_list); |
451 | if (!rs->status) | |
452 | cl->state = MEI_FILE_DISCONNECTED; | |
fb7d879f | 453 | |
b7cd2d9f TW |
454 | cl->status = 0; |
455 | cl->timer_count = 0; | |
456 | break; | |
fb7d879f OW |
457 | } |
458 | } | |
459 | } | |
460 | ||
461 | /** | |
462 | * same_flow_addr - tells if they have the same address. | |
463 | * | |
464 | * @file: private data of the file object. | |
465 | * @flow: flow control. | |
466 | * | |
467 | * returns !=0, same; 0,not. | |
468 | */ | |
469 | static int same_flow_addr(struct mei_cl *cl, struct hbm_flow_control *flow) | |
470 | { | |
471 | return (cl->host_client_id == flow->host_addr && | |
472 | cl->me_client_id == flow->me_addr); | |
473 | } | |
474 | ||
475 | /** | |
476 | * add_single_flow_creds - adds single buffer credentials. | |
477 | * | |
478 | * @file: private data ot the file object. | |
479 | * @flow: flow control. | |
480 | */ | |
481 | static void add_single_flow_creds(struct mei_device *dev, | |
482 | struct hbm_flow_control *flow) | |
483 | { | |
484 | struct mei_me_client *client; | |
485 | int i; | |
486 | ||
cf9673da | 487 | for (i = 0; i < dev->me_clients_num; i++) { |
fb7d879f OW |
488 | client = &dev->me_clients[i]; |
489 | if (client && flow->me_addr == client->client_id) { | |
490 | if (client->props.single_recv_buf) { | |
491 | client->mei_flow_ctrl_creds++; | |
492 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", | |
493 | flow->me_addr); | |
494 | dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", | |
495 | client->mei_flow_ctrl_creds); | |
496 | } else { | |
497 | BUG(); /* error in flow control */ | |
498 | } | |
499 | } | |
500 | } | |
501 | } | |
502 | ||
503 | /** | |
504 | * mei_client_flow_control_response - flow control response irq routine | |
505 | * | |
506 | * @dev: the device structure | |
507 | * @flow_control: flow control response bus message | |
508 | */ | |
509 | static void mei_client_flow_control_response(struct mei_device *dev, | |
510 | struct hbm_flow_control *flow_control) | |
511 | { | |
512 | struct mei_cl *cl_pos = NULL; | |
513 | struct mei_cl *cl_next = NULL; | |
514 | ||
515 | if (!flow_control->host_addr) { | |
516 | /* single receive buffer */ | |
517 | add_single_flow_creds(dev, flow_control); | |
518 | } else { | |
519 | /* normal connection */ | |
520 | list_for_each_entry_safe(cl_pos, cl_next, | |
521 | &dev->file_list, link) { | |
522 | dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in file_list\n"); | |
523 | ||
524 | dev_dbg(&dev->pdev->dev, "cl of host client %d ME client %d.\n", | |
525 | cl_pos->host_client_id, | |
526 | cl_pos->me_client_id); | |
527 | dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", | |
528 | flow_control->host_addr, | |
529 | flow_control->me_addr); | |
530 | if (same_flow_addr(cl_pos, flow_control)) { | |
531 | dev_dbg(&dev->pdev->dev, "recv ctrl msg for host %d ME %d.\n", | |
532 | flow_control->host_addr, | |
533 | flow_control->me_addr); | |
534 | cl_pos->mei_flow_ctrl_creds++; | |
535 | dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", | |
536 | cl_pos->mei_flow_ctrl_creds); | |
537 | break; | |
538 | } | |
539 | } | |
540 | } | |
541 | } | |
542 | ||
543 | /** | |
544 | * same_disconn_addr - tells if they have the same address | |
545 | * | |
546 | * @file: private data of the file object. | |
547 | * @disconn: disconnection request. | |
548 | * | |
549 | * returns !=0, same; 0,not. | |
550 | */ | |
551 | static int same_disconn_addr(struct mei_cl *cl, | |
552 | struct hbm_client_disconnect_request *disconn) | |
553 | { | |
554 | return (cl->host_client_id == disconn->host_addr && | |
555 | cl->me_client_id == disconn->me_addr); | |
556 | } | |
557 | ||
558 | /** | |
559 | * mei_client_disconnect_request - disconnects from request irq routine | |
560 | * | |
561 | * @dev: the device structure. | |
562 | * @disconnect_req: disconnect request bus message. | |
563 | */ | |
564 | static void mei_client_disconnect_request(struct mei_device *dev, | |
565 | struct hbm_client_disconnect_request *disconnect_req) | |
566 | { | |
567 | struct mei_msg_hdr *mei_hdr; | |
568 | struct hbm_client_connect_response *disconnect_res; | |
569 | struct mei_cl *cl_pos = NULL; | |
570 | struct mei_cl *cl_next = NULL; | |
571 | ||
572 | list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { | |
573 | if (same_disconn_addr(cl_pos, disconnect_req)) { | |
574 | dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", | |
575 | disconnect_req->host_addr, | |
576 | disconnect_req->me_addr); | |
577 | cl_pos->state = MEI_FILE_DISCONNECTED; | |
578 | cl_pos->timer_count = 0; | |
579 | if (cl_pos == &dev->wd_cl) { | |
580 | dev->wd_due_counter = 0; | |
eb9af0ac | 581 | dev->wd_pending = false; |
fb7d879f OW |
582 | } else if (cl_pos == &dev->iamthif_cl) |
583 | dev->iamthif_timer = 0; | |
584 | ||
585 | /* prepare disconnect response */ | |
586 | mei_hdr = | |
587 | (struct mei_msg_hdr *) &dev->ext_msg_buf[0]; | |
588 | mei_hdr->host_addr = 0; | |
589 | mei_hdr->me_addr = 0; | |
590 | mei_hdr->length = | |
591 | sizeof(struct hbm_client_connect_response); | |
592 | mei_hdr->msg_complete = 1; | |
593 | mei_hdr->reserved = 0; | |
594 | ||
595 | disconnect_res = | |
596 | (struct hbm_client_connect_response *) | |
597 | &dev->ext_msg_buf[1]; | |
598 | disconnect_res->host_addr = cl_pos->host_client_id; | |
599 | disconnect_res->me_addr = cl_pos->me_client_id; | |
600 | *(u8 *) (&disconnect_res->cmd) = | |
601 | CLIENT_DISCONNECT_RES_CMD; | |
602 | disconnect_res->status = 0; | |
603 | dev->extra_write_index = 2; | |
604 | break; | |
605 | } | |
606 | } | |
607 | } | |
608 | ||
609 | ||
610 | /** | |
611 | * mei_irq_thread_read_bus_message - bottom half read routine after ISR to | |
612 | * handle the read bus message cmd processing. | |
613 | * | |
614 | * @dev: the device structure | |
615 | * @mei_hdr: header of bus message | |
616 | */ | |
617 | static void mei_irq_thread_read_bus_message(struct mei_device *dev, | |
618 | struct mei_msg_hdr *mei_hdr) | |
619 | { | |
620 | struct mei_bus_message *mei_msg; | |
621 | struct hbm_host_version_response *version_res; | |
622 | struct hbm_client_connect_response *connect_res; | |
623 | struct hbm_client_connect_response *disconnect_res; | |
624 | struct hbm_flow_control *flow_control; | |
625 | struct hbm_props_response *props_res; | |
626 | struct hbm_host_enum_response *enum_res; | |
627 | struct hbm_client_disconnect_request *disconnect_req; | |
628 | struct hbm_host_stop_request *host_stop_req; | |
abc51b6d | 629 | int res; |
fb7d879f | 630 | |
fb7d879f OW |
631 | |
632 | /* read the message to our buffer */ | |
fb7d879f | 633 | BUG_ON(mei_hdr->length >= sizeof(dev->rd_msg_buf)); |
edf1eed4 TW |
634 | mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length); |
635 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; | |
fb7d879f OW |
636 | |
637 | switch (*(u8 *) mei_msg) { | |
638 | case HOST_START_RES_CMD: | |
639 | version_res = (struct hbm_host_version_response *) mei_msg; | |
640 | if (version_res->host_version_supported) { | |
641 | dev->version.major_version = HBM_MAJOR_VERSION; | |
642 | dev->version.minor_version = HBM_MINOR_VERSION; | |
643 | if (dev->mei_state == MEI_INIT_CLIENTS && | |
644 | dev->init_clients_state == MEI_START_MESSAGE) { | |
645 | dev->init_clients_timer = 0; | |
c95efb74 | 646 | mei_host_enum_clients_message(dev); |
fb7d879f | 647 | } else { |
eb9af0ac | 648 | dev->recvd_msg = false; |
fb7d879f OW |
649 | dev_dbg(&dev->pdev->dev, "IMEI reset due to received host start response bus message.\n"); |
650 | mei_reset(dev, 1); | |
651 | return; | |
652 | } | |
653 | } else { | |
654 | dev->version = version_res->me_max_version; | |
655 | /* send stop message */ | |
656 | mei_hdr->host_addr = 0; | |
657 | mei_hdr->me_addr = 0; | |
658 | mei_hdr->length = sizeof(struct hbm_host_stop_request); | |
659 | mei_hdr->msg_complete = 1; | |
660 | mei_hdr->reserved = 0; | |
661 | ||
662 | host_stop_req = (struct hbm_host_stop_request *) | |
663 | &dev->wr_msg_buf[1]; | |
664 | ||
665 | memset(host_stop_req, | |
666 | 0, | |
667 | sizeof(struct hbm_host_stop_request)); | |
668 | host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD; | |
669 | host_stop_req->reason = DRIVER_STOP_REQUEST; | |
670 | mei_write_message(dev, mei_hdr, | |
671 | (unsigned char *) (host_stop_req), | |
672 | mei_hdr->length); | |
673 | dev_dbg(&dev->pdev->dev, "version mismatch.\n"); | |
674 | return; | |
675 | } | |
676 | ||
eb9af0ac | 677 | dev->recvd_msg = true; |
fb7d879f OW |
678 | dev_dbg(&dev->pdev->dev, "host start response message received.\n"); |
679 | break; | |
680 | ||
681 | case CLIENT_CONNECT_RES_CMD: | |
682 | connect_res = | |
683 | (struct hbm_client_connect_response *) mei_msg; | |
684 | mei_client_connect_response(dev, connect_res); | |
685 | dev_dbg(&dev->pdev->dev, "client connect response message received.\n"); | |
686 | wake_up(&dev->wait_recvd_msg); | |
687 | break; | |
688 | ||
689 | case CLIENT_DISCONNECT_RES_CMD: | |
690 | disconnect_res = | |
691 | (struct hbm_client_connect_response *) mei_msg; | |
441ab50f | 692 | mei_client_disconnect_response(dev, disconnect_res); |
fb7d879f OW |
693 | dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n"); |
694 | wake_up(&dev->wait_recvd_msg); | |
695 | break; | |
696 | ||
697 | case MEI_FLOW_CONTROL_CMD: | |
698 | flow_control = (struct hbm_flow_control *) mei_msg; | |
699 | mei_client_flow_control_response(dev, flow_control); | |
700 | dev_dbg(&dev->pdev->dev, "client flow control response message received.\n"); | |
701 | break; | |
702 | ||
703 | case HOST_CLIENT_PROPERTIES_RES_CMD: | |
704 | props_res = (struct hbm_props_response *)mei_msg; | |
705 | if (props_res->status || !dev->me_clients) { | |
706 | dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n"); | |
707 | mei_reset(dev, 1); | |
708 | return; | |
709 | } | |
441ab50f | 710 | if (dev->me_clients[dev->me_client_presentation_num] |
fb7d879f OW |
711 | .client_id == props_res->address) { |
712 | ||
713 | dev->me_clients[dev->me_client_presentation_num].props | |
714 | = props_res->client_properties; | |
715 | ||
716 | if (dev->mei_state == MEI_INIT_CLIENTS && | |
717 | dev->init_clients_state == | |
718 | MEI_CLIENT_PROPERTIES_MESSAGE) { | |
719 | dev->me_client_index++; | |
720 | dev->me_client_presentation_num++; | |
abc51b6d OW |
721 | |
722 | /** Send Client Propeties request **/ | |
723 | res = mei_host_client_properties(dev); | |
724 | if (res < 0) { | |
725 | dev_dbg(&dev->pdev->dev, "mei_host_client_properties() failed"); | |
726 | return; | |
727 | } else if (!res) { | |
728 | /* | |
729 | * No more clients to send to. | |
730 | * Clear Map for indicating now ME clients | |
731 | * with associated host client | |
732 | */ | |
733 | bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX); | |
734 | dev->open_handle_count = 0; | |
735 | ||
736 | /* | |
737 | * Reserving the first three client IDs | |
738 | * Client Id 0 - Reserved for MEI Bus Message communications | |
739 | * Client Id 1 - Reserved for Watchdog | |
740 | * Client ID 2 - Reserved for AMTHI | |
741 | */ | |
742 | bitmap_set(dev->host_clients_map, 0, 3); | |
743 | dev->mei_state = MEI_ENABLED; | |
744 | ||
745 | /* if wd initialization fails, initialization the AMTHI client, | |
746 | * otherwise the AMTHI client will be initialized after the WD client connect response | |
747 | * will be received | |
748 | */ | |
749 | if (mei_wd_host_init(dev)) | |
750 | mei_host_init_iamthif(dev); | |
751 | } | |
752 | ||
fb7d879f OW |
753 | } else { |
754 | dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message"); | |
755 | mei_reset(dev, 1); | |
756 | return; | |
757 | } | |
758 | } else { | |
759 | dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message for wrong client ID\n"); | |
760 | mei_reset(dev, 1); | |
761 | return; | |
762 | } | |
763 | break; | |
764 | ||
765 | case HOST_ENUM_RES_CMD: | |
766 | enum_res = (struct hbm_host_enum_response *) mei_msg; | |
767 | memcpy(dev->me_clients_map, enum_res->valid_addresses, 32); | |
768 | if (dev->mei_state == MEI_INIT_CLIENTS && | |
769 | dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) { | |
770 | dev->init_clients_timer = 0; | |
771 | dev->me_client_presentation_num = 0; | |
772 | dev->me_client_index = 0; | |
c95efb74 | 773 | mei_allocate_me_clients_storage(dev); |
fb7d879f OW |
774 | dev->init_clients_state = |
775 | MEI_CLIENT_PROPERTIES_MESSAGE; | |
c95efb74 | 776 | mei_host_client_properties(dev); |
fb7d879f OW |
777 | } else { |
778 | dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n"); | |
779 | mei_reset(dev, 1); | |
780 | return; | |
781 | } | |
782 | break; | |
783 | ||
784 | case HOST_STOP_RES_CMD: | |
785 | dev->mei_state = MEI_DISABLED; | |
786 | dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n"); | |
787 | mei_reset(dev, 1); | |
788 | break; | |
789 | ||
790 | case CLIENT_DISCONNECT_REQ_CMD: | |
791 | /* search for client */ | |
792 | disconnect_req = | |
793 | (struct hbm_client_disconnect_request *) mei_msg; | |
794 | mei_client_disconnect_request(dev, disconnect_req); | |
795 | break; | |
796 | ||
797 | case ME_STOP_REQ_CMD: | |
798 | /* prepare stop request */ | |
799 | mei_hdr = (struct mei_msg_hdr *) &dev->ext_msg_buf[0]; | |
800 | mei_hdr->host_addr = 0; | |
801 | mei_hdr->me_addr = 0; | |
802 | mei_hdr->length = sizeof(struct hbm_host_stop_request); | |
803 | mei_hdr->msg_complete = 1; | |
804 | mei_hdr->reserved = 0; | |
805 | host_stop_req = | |
806 | (struct hbm_host_stop_request *) &dev->ext_msg_buf[1]; | |
807 | memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request)); | |
808 | host_stop_req->cmd.cmd = HOST_STOP_REQ_CMD; | |
809 | host_stop_req->reason = DRIVER_STOP_REQUEST; | |
810 | host_stop_req->reserved[0] = 0; | |
811 | host_stop_req->reserved[1] = 0; | |
812 | dev->extra_write_index = 2; | |
813 | break; | |
814 | ||
815 | default: | |
816 | BUG(); | |
817 | break; | |
818 | ||
819 | } | |
820 | } | |
821 | ||
822 | ||
823 | /** | |
824 | * _mei_hb_read - processes read related operation. | |
825 | * | |
826 | * @dev: the device structure. | |
827 | * @slots: free slots. | |
828 | * @cb_pos: callback block. | |
829 | * @cl: private data of the file object. | |
830 | * @cmpl_list: complete list. | |
831 | * | |
832 | * returns 0, OK; otherwise, error. | |
833 | */ | |
834 | static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots, | |
835 | struct mei_cl_cb *cb_pos, | |
836 | struct mei_cl *cl, | |
837 | struct mei_io_list *cmpl_list) | |
838 | { | |
839 | if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) + | |
840 | sizeof(struct hbm_flow_control))) { | |
841 | *slots -= (sizeof(struct mei_msg_hdr) + | |
842 | sizeof(struct hbm_flow_control) + 3) / 4; | |
843 | if (!mei_send_flow_control(dev, cl)) { | |
844 | cl->status = -ENODEV; | |
845 | cb_pos->information = 0; | |
846 | list_move_tail(&cb_pos->cb_list, | |
847 | &cmpl_list->mei_cb.cb_list); | |
848 | return -ENODEV; | |
849 | } else { | |
850 | list_move_tail(&cb_pos->cb_list, | |
851 | &dev->read_list.mei_cb.cb_list); | |
852 | } | |
853 | } else { | |
854 | /* return the cancel routine */ | |
855 | list_del(&cb_pos->cb_list); | |
856 | return -EBADMSG; | |
857 | } | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
862 | ||
863 | /** | |
864 | * _mei_irq_thread_ioctl - processes ioctl related operation. | |
865 | * | |
866 | * @dev: the device structure. | |
867 | * @slots: free slots. | |
868 | * @cb_pos: callback block. | |
869 | * @cl: private data of the file object. | |
870 | * @cmpl_list: complete list. | |
871 | * | |
872 | * returns 0, OK; otherwise, error. | |
873 | */ | |
874 | static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots, | |
875 | struct mei_cl_cb *cb_pos, | |
876 | struct mei_cl *cl, | |
877 | struct mei_io_list *cmpl_list) | |
878 | { | |
879 | if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) + | |
880 | sizeof(struct hbm_client_connect_request))) { | |
881 | cl->state = MEI_FILE_CONNECTING; | |
882 | *slots -= (sizeof(struct mei_msg_hdr) + | |
883 | sizeof(struct hbm_client_connect_request) + 3) / 4; | |
884 | if (!mei_connect(dev, cl)) { | |
885 | cl->status = -ENODEV; | |
886 | cb_pos->information = 0; | |
887 | list_del(&cb_pos->cb_list); | |
888 | return -ENODEV; | |
889 | } else { | |
890 | list_move_tail(&cb_pos->cb_list, | |
891 | &dev->ctrl_rd_list.mei_cb.cb_list); | |
892 | cl->timer_count = MEI_CONNECT_TIMEOUT; | |
893 | } | |
894 | } else { | |
895 | /* return the cancel routine */ | |
896 | list_del(&cb_pos->cb_list); | |
897 | return -EBADMSG; | |
898 | } | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | /** | |
904 | * _mei_irq_thread_cmpl - processes completed and no-iamthif operation. | |
905 | * | |
906 | * @dev: the device structure. | |
907 | * @slots: free slots. | |
908 | * @cb_pos: callback block. | |
909 | * @cl: private data of the file object. | |
910 | * @cmpl_list: complete list. | |
911 | * | |
912 | * returns 0, OK; otherwise, error. | |
913 | */ | |
914 | static int _mei_irq_thread_cmpl(struct mei_device *dev, s32 *slots, | |
915 | struct mei_cl_cb *cb_pos, | |
916 | struct mei_cl *cl, | |
917 | struct mei_io_list *cmpl_list) | |
918 | { | |
919 | struct mei_msg_hdr *mei_hdr; | |
920 | ||
921 | if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) + | |
922 | (cb_pos->request_buffer.size - | |
923 | cb_pos->information))) { | |
924 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; | |
925 | mei_hdr->host_addr = cl->host_client_id; | |
926 | mei_hdr->me_addr = cl->me_client_id; | |
927 | mei_hdr->length = cb_pos->request_buffer.size - | |
928 | cb_pos->information; | |
929 | mei_hdr->msg_complete = 1; | |
930 | mei_hdr->reserved = 0; | |
931 | dev_dbg(&dev->pdev->dev, "cb_pos->request_buffer.size =%d" | |
932 | "mei_hdr->msg_complete = %d\n", | |
933 | cb_pos->request_buffer.size, | |
934 | mei_hdr->msg_complete); | |
935 | dev_dbg(&dev->pdev->dev, "cb_pos->information =%lu\n", | |
936 | cb_pos->information); | |
937 | dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", | |
938 | mei_hdr->length); | |
939 | *slots -= (sizeof(struct mei_msg_hdr) + | |
940 | mei_hdr->length + 3) / 4; | |
941 | if (!mei_write_message(dev, mei_hdr, | |
942 | (unsigned char *) | |
943 | (cb_pos->request_buffer.data + | |
944 | cb_pos->information), | |
945 | mei_hdr->length)) { | |
946 | cl->status = -ENODEV; | |
947 | list_move_tail(&cb_pos->cb_list, | |
948 | &cmpl_list->mei_cb.cb_list); | |
949 | return -ENODEV; | |
950 | } else { | |
951 | if (mei_flow_ctrl_reduce(dev, cl)) | |
952 | return -ENODEV; | |
953 | cl->status = 0; | |
954 | cb_pos->information += mei_hdr->length; | |
955 | list_move_tail(&cb_pos->cb_list, | |
956 | &dev->write_waiting_list.mei_cb.cb_list); | |
957 | } | |
958 | } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) { | |
959 | /* buffer is still empty */ | |
960 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; | |
961 | mei_hdr->host_addr = cl->host_client_id; | |
962 | mei_hdr->me_addr = cl->me_client_id; | |
963 | mei_hdr->length = | |
964 | (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); | |
965 | mei_hdr->msg_complete = 0; | |
966 | mei_hdr->reserved = 0; | |
967 | ||
968 | (*slots) -= (sizeof(struct mei_msg_hdr) + | |
969 | mei_hdr->length + 3) / 4; | |
970 | if (!mei_write_message(dev, mei_hdr, | |
971 | (unsigned char *) | |
972 | (cb_pos->request_buffer.data + | |
973 | cb_pos->information), | |
974 | mei_hdr->length)) { | |
975 | cl->status = -ENODEV; | |
976 | list_move_tail(&cb_pos->cb_list, | |
977 | &cmpl_list->mei_cb.cb_list); | |
978 | return -ENODEV; | |
979 | } else { | |
980 | cb_pos->information += mei_hdr->length; | |
981 | dev_dbg(&dev->pdev->dev, | |
982 | "cb_pos->request_buffer.size =%d" | |
983 | " mei_hdr->msg_complete = %d\n", | |
984 | cb_pos->request_buffer.size, | |
985 | mei_hdr->msg_complete); | |
986 | dev_dbg(&dev->pdev->dev, "cb_pos->information =%lu\n", | |
987 | cb_pos->information); | |
988 | dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", | |
989 | mei_hdr->length); | |
990 | } | |
991 | return -EMSGSIZE; | |
992 | } else { | |
993 | return -EBADMSG; | |
994 | } | |
995 | ||
996 | return 0; | |
997 | } | |
998 | ||
999 | /** | |
1000 | * _mei_irq_thread_cmpl_iamthif - processes completed iamthif operation. | |
1001 | * | |
1002 | * @dev: the device structure. | |
1003 | * @slots: free slots. | |
1004 | * @cb_pos: callback block. | |
1005 | * @cl: private data of the file object. | |
1006 | * @cmpl_list: complete list. | |
1007 | * | |
1008 | * returns 0, OK; otherwise, error. | |
1009 | */ | |
1010 | static int _mei_irq_thread_cmpl_iamthif(struct mei_device *dev, s32 *slots, | |
1011 | struct mei_cl_cb *cb_pos, | |
1012 | struct mei_cl *cl, | |
1013 | struct mei_io_list *cmpl_list) | |
1014 | { | |
1015 | struct mei_msg_hdr *mei_hdr; | |
1016 | ||
1017 | if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) + | |
1018 | dev->iamthif_msg_buf_size - | |
1019 | dev->iamthif_msg_buf_index)) { | |
1020 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; | |
1021 | mei_hdr->host_addr = cl->host_client_id; | |
1022 | mei_hdr->me_addr = cl->me_client_id; | |
1023 | mei_hdr->length = dev->iamthif_msg_buf_size - | |
1024 | dev->iamthif_msg_buf_index; | |
1025 | mei_hdr->msg_complete = 1; | |
1026 | mei_hdr->reserved = 0; | |
1027 | ||
1028 | *slots -= (sizeof(struct mei_msg_hdr) + | |
1029 | mei_hdr->length + 3) / 4; | |
1030 | ||
1031 | if (!mei_write_message(dev, mei_hdr, | |
1032 | (dev->iamthif_msg_buf + | |
1033 | dev->iamthif_msg_buf_index), | |
1034 | mei_hdr->length)) { | |
1035 | dev->iamthif_state = MEI_IAMTHIF_IDLE; | |
1036 | cl->status = -ENODEV; | |
1037 | list_del(&cb_pos->cb_list); | |
1038 | return -ENODEV; | |
1039 | } else { | |
1040 | if (mei_flow_ctrl_reduce(dev, cl)) | |
1041 | return -ENODEV; | |
1042 | dev->iamthif_msg_buf_index += mei_hdr->length; | |
1043 | cb_pos->information = dev->iamthif_msg_buf_index; | |
1044 | cl->status = 0; | |
1045 | dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL; | |
eb9af0ac | 1046 | dev->iamthif_flow_control_pending = true; |
fb7d879f OW |
1047 | /* save iamthif cb sent to amthi client */ |
1048 | dev->iamthif_current_cb = cb_pos; | |
1049 | list_move_tail(&cb_pos->cb_list, | |
1050 | &dev->write_waiting_list.mei_cb.cb_list); | |
1051 | ||
1052 | } | |
1053 | } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) { | |
1054 | /* buffer is still empty */ | |
1055 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; | |
1056 | mei_hdr->host_addr = cl->host_client_id; | |
1057 | mei_hdr->me_addr = cl->me_client_id; | |
1058 | mei_hdr->length = | |
1059 | (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); | |
1060 | mei_hdr->msg_complete = 0; | |
1061 | mei_hdr->reserved = 0; | |
1062 | ||
1063 | *slots -= (sizeof(struct mei_msg_hdr) + | |
1064 | mei_hdr->length + 3) / 4; | |
1065 | ||
1066 | if (!mei_write_message(dev, mei_hdr, | |
1067 | (dev->iamthif_msg_buf + | |
1068 | dev->iamthif_msg_buf_index), | |
1069 | mei_hdr->length)) { | |
1070 | cl->status = -ENODEV; | |
1071 | list_del(&cb_pos->cb_list); | |
1072 | } else { | |
1073 | dev->iamthif_msg_buf_index += mei_hdr->length; | |
1074 | } | |
1075 | return -EMSGSIZE; | |
1076 | } else { | |
1077 | return -EBADMSG; | |
1078 | } | |
1079 | ||
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * mei_irq_thread_read_handler - bottom half read routine after ISR to | |
1085 | * handle the read processing. | |
1086 | * | |
1087 | * @cmpl_list: An instance of our list structure | |
1088 | * @dev: the device structure | |
1089 | * @slots: slots to read. | |
1090 | * | |
1091 | * returns 0 on success, <0 on failure. | |
1092 | */ | |
1093 | static int mei_irq_thread_read_handler(struct mei_io_list *cmpl_list, | |
1094 | struct mei_device *dev, | |
1095 | s32 *slots) | |
1096 | { | |
1097 | struct mei_msg_hdr *mei_hdr; | |
1098 | struct mei_cl *cl_pos = NULL; | |
1099 | struct mei_cl *cl_next = NULL; | |
1100 | int ret = 0; | |
1101 | ||
1102 | if (!dev->rd_msg_hdr) { | |
1103 | dev->rd_msg_hdr = mei_mecbrw_read(dev); | |
1104 | dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots); | |
1105 | (*slots)--; | |
1106 | dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots); | |
1107 | } | |
1108 | mei_hdr = (struct mei_msg_hdr *) &dev->rd_msg_hdr; | |
1109 | dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", mei_hdr->length); | |
1110 | ||
1111 | if (mei_hdr->reserved || !dev->rd_msg_hdr) { | |
1112 | dev_dbg(&dev->pdev->dev, "corrupted message header.\n"); | |
1113 | ret = -EBADMSG; | |
1114 | goto end; | |
1115 | } | |
1116 | ||
1117 | if (mei_hdr->host_addr || mei_hdr->me_addr) { | |
1118 | list_for_each_entry_safe(cl_pos, cl_next, | |
1119 | &dev->file_list, link) { | |
1120 | dev_dbg(&dev->pdev->dev, | |
1121 | "list_for_each_entry_safe read host" | |
1122 | " client = %d, ME client = %d\n", | |
1123 | cl_pos->host_client_id, | |
1124 | cl_pos->me_client_id); | |
1125 | if (cl_pos->host_client_id == mei_hdr->host_addr && | |
1126 | cl_pos->me_client_id == mei_hdr->me_addr) | |
1127 | break; | |
1128 | } | |
1129 | ||
1130 | if (&cl_pos->link == &dev->file_list) { | |
1131 | dev_dbg(&dev->pdev->dev, "corrupted message header\n"); | |
1132 | ret = -EBADMSG; | |
1133 | goto end; | |
1134 | } | |
1135 | } | |
1136 | if (((*slots) * sizeof(u32)) < mei_hdr->length) { | |
1137 | dev_dbg(&dev->pdev->dev, | |
1138 | "we can't read the message slots =%08x.\n", | |
1139 | *slots); | |
1140 | /* we can't read the message */ | |
1141 | ret = -ERANGE; | |
1142 | goto end; | |
1143 | } | |
1144 | ||
1145 | /* decide where to read the message too */ | |
1146 | if (!mei_hdr->host_addr) { | |
1147 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_bus_message.\n"); | |
1148 | mei_irq_thread_read_bus_message(dev, mei_hdr); | |
1149 | dev_dbg(&dev->pdev->dev, "end mei_irq_thread_read_bus_message.\n"); | |
1150 | } else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id && | |
1151 | (MEI_FILE_CONNECTED == dev->iamthif_cl.state) && | |
1152 | (dev->iamthif_state == MEI_IAMTHIF_READING)) { | |
1153 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n"); | |
1154 | dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", | |
1155 | mei_hdr->length); | |
1156 | ret = mei_irq_thread_read_amthi_message(cmpl_list, | |
1157 | dev, mei_hdr); | |
1158 | if (ret) | |
1159 | goto end; | |
1160 | ||
1161 | } else { | |
1162 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_client_message.\n"); | |
1163 | ret = mei_irq_thread_read_client_message(cmpl_list, | |
1164 | dev, mei_hdr); | |
1165 | if (ret) | |
1166 | goto end; | |
1167 | ||
1168 | } | |
1169 | ||
1170 | /* reset the number of slots and header */ | |
1171 | *slots = mei_count_full_read_slots(dev); | |
1172 | dev->rd_msg_hdr = 0; | |
1173 | ||
1174 | if (*slots == -EOVERFLOW) { | |
1175 | /* overflow - reset */ | |
1176 | dev_dbg(&dev->pdev->dev, "resetting due to slots overflow.\n"); | |
1177 | /* set the event since message has been read */ | |
1178 | ret = -ERANGE; | |
1179 | goto end; | |
1180 | } | |
1181 | end: | |
1182 | return ret; | |
1183 | } | |
1184 | ||
1185 | ||
1186 | /** | |
1187 | * mei_irq_thread_write_handler - bottom half write routine after | |
1188 | * ISR to handle the write processing. | |
1189 | * | |
1190 | * @cmpl_list: An instance of our list structure | |
1191 | * @dev: the device structure | |
1192 | * @slots: slots to write. | |
1193 | * | |
1194 | * returns 0 on success, <0 on failure. | |
1195 | */ | |
1196 | static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list, | |
1197 | struct mei_device *dev, | |
1198 | s32 *slots) | |
1199 | { | |
1200 | ||
1201 | struct mei_cl *cl; | |
b7cd2d9f | 1202 | struct mei_cl_cb *pos = NULL, *next = NULL; |
fb7d879f OW |
1203 | struct mei_io_list *list; |
1204 | int ret; | |
1205 | ||
1206 | if (!mei_host_buffer_is_empty(dev)) { | |
1207 | dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n"); | |
1208 | return 0; | |
1209 | } | |
fb7d879f OW |
1210 | *slots = mei_count_empty_write_slots(dev); |
1211 | /* complete all waiting for write CB */ | |
1212 | dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n"); | |
1213 | ||
1214 | list = &dev->write_waiting_list; | |
b7cd2d9f TW |
1215 | list_for_each_entry_safe(pos, next, |
1216 | &list->mei_cb.cb_list, cb_list) { | |
1217 | cl = (struct mei_cl *)pos->file_private; | |
1218 | if (cl == NULL) | |
1219 | continue; | |
1220 | ||
1221 | cl->status = 0; | |
1222 | list_del(&pos->cb_list); | |
1223 | if (MEI_WRITING == cl->writing_state && | |
1224 | (pos->major_file_operations == MEI_WRITE) && | |
1225 | (cl != &dev->iamthif_cl)) { | |
1226 | dev_dbg(&dev->pdev->dev, | |
1227 | "MEI WRITE COMPLETE\n"); | |
1228 | cl->writing_state = MEI_WRITE_COMPLETE; | |
1229 | list_add_tail(&pos->cb_list, | |
1230 | &cmpl_list->mei_cb.cb_list); | |
1231 | } | |
1232 | if (cl == &dev->iamthif_cl) { | |
1233 | dev_dbg(&dev->pdev->dev, "check iamthif flow control.\n"); | |
1234 | if (dev->iamthif_flow_control_pending) { | |
1235 | ret = _mei_irq_thread_iamthif_read( | |
1236 | dev, slots); | |
1237 | if (ret) | |
1238 | return ret; | |
fb7d879f | 1239 | } |
fb7d879f OW |
1240 | } |
1241 | } | |
1242 | ||
1243 | if (dev->stop && !dev->wd_pending) { | |
eb9af0ac | 1244 | dev->wd_stopped = true; |
fb7d879f OW |
1245 | wake_up_interruptible(&dev->wait_stop_wd); |
1246 | return 0; | |
1247 | } | |
1248 | ||
1249 | if (dev->extra_write_index) { | |
1250 | dev_dbg(&dev->pdev->dev, "extra_write_index =%d.\n", | |
1251 | dev->extra_write_index); | |
1252 | mei_write_message(dev, | |
1253 | (struct mei_msg_hdr *) &dev->ext_msg_buf[0], | |
1254 | (unsigned char *) &dev->ext_msg_buf[1], | |
1255 | (dev->extra_write_index - 1) * sizeof(u32)); | |
1256 | *slots -= dev->extra_write_index; | |
1257 | dev->extra_write_index = 0; | |
1258 | } | |
1259 | if (dev->mei_state == MEI_ENABLED) { | |
1260 | if (dev->wd_pending && | |
1261 | mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) { | |
1262 | if (mei_wd_send(dev)) | |
1263 | dev_dbg(&dev->pdev->dev, "wd send failed.\n"); | |
1264 | else | |
1265 | if (mei_flow_ctrl_reduce(dev, &dev->wd_cl)) | |
1266 | return -ENODEV; | |
1267 | ||
eb9af0ac | 1268 | dev->wd_pending = false; |
fb7d879f OW |
1269 | |
1270 | if (dev->wd_timeout) { | |
1271 | *slots -= (sizeof(struct mei_msg_hdr) + | |
1272 | MEI_START_WD_DATA_SIZE + 3) / 4; | |
1273 | dev->wd_due_counter = 2; | |
1274 | } else { | |
1275 | *slots -= (sizeof(struct mei_msg_hdr) + | |
1276 | MEI_WD_PARAMS_SIZE + 3) / 4; | |
1277 | dev->wd_due_counter = 0; | |
1278 | } | |
1279 | ||
1280 | } | |
1281 | } | |
1282 | if (dev->stop) | |
1283 | return ~ENODEV; | |
1284 | ||
1285 | /* complete control write list CB */ | |
c8372094 | 1286 | dev_dbg(&dev->pdev->dev, "complete control write list cb.\n"); |
b7cd2d9f | 1287 | list_for_each_entry_safe(pos, next, |
fb7d879f | 1288 | &dev->ctrl_wr_list.mei_cb.cb_list, cb_list) { |
b7cd2d9f | 1289 | cl = (struct mei_cl *) pos->file_private; |
c8372094 | 1290 | if (!cl) { |
b7cd2d9f | 1291 | list_del(&pos->cb_list); |
c8372094 TW |
1292 | return -ENODEV; |
1293 | } | |
b7cd2d9f | 1294 | switch (pos->major_file_operations) { |
c8372094 TW |
1295 | case MEI_CLOSE: |
1296 | /* send disconnect message */ | |
b7cd2d9f | 1297 | ret = _mei_irq_thread_close(dev, slots, pos, cl, cmpl_list); |
c8372094 TW |
1298 | if (ret) |
1299 | return ret; | |
fb7d879f | 1300 | |
c8372094 TW |
1301 | break; |
1302 | case MEI_READ: | |
1303 | /* send flow control message */ | |
b7cd2d9f | 1304 | ret = _mei_irq_thread_read(dev, slots, pos, cl, cmpl_list); |
c8372094 TW |
1305 | if (ret) |
1306 | return ret; | |
fb7d879f | 1307 | |
c8372094 TW |
1308 | break; |
1309 | case MEI_IOCTL: | |
1310 | /* connect message */ | |
e8cd29d8 | 1311 | if (mei_other_client_is_connecting(dev, cl)) |
c8372094 | 1312 | continue; |
b7cd2d9f | 1313 | ret = _mei_irq_thread_ioctl(dev, slots, pos, cl, cmpl_list); |
c8372094 TW |
1314 | if (ret) |
1315 | return ret; | |
fb7d879f | 1316 | |
c8372094 | 1317 | break; |
fb7d879f | 1318 | |
c8372094 TW |
1319 | default: |
1320 | BUG(); | |
fb7d879f | 1321 | } |
c8372094 | 1322 | |
fb7d879f OW |
1323 | } |
1324 | /* complete write list CB */ | |
b7cd2d9f TW |
1325 | dev_dbg(&dev->pdev->dev, "complete write list cb.\n"); |
1326 | list_for_each_entry_safe(pos, next, | |
1327 | &dev->write_list.mei_cb.cb_list, cb_list) { | |
1328 | cl = (struct mei_cl *)pos->file_private; | |
1329 | if (cl == NULL) | |
1330 | continue; | |
1331 | ||
1332 | if (cl != &dev->iamthif_cl) { | |
1333 | if (!mei_flow_ctrl_creds(dev, cl)) { | |
1334 | dev_dbg(&dev->pdev->dev, | |
1335 | "No flow control" | |
1336 | " credentials for client" | |
1337 | " %d, not sending.\n", | |
1338 | cl->host_client_id); | |
1339 | continue; | |
1340 | } | |
1341 | ret = _mei_irq_thread_cmpl(dev, slots, | |
1342 | pos, | |
1343 | cl, cmpl_list); | |
1344 | if (ret) | |
1345 | return ret; | |
fb7d879f | 1346 | |
b7cd2d9f TW |
1347 | } else if (cl == &dev->iamthif_cl) { |
1348 | /* IAMTHIF IOCTL */ | |
1349 | dev_dbg(&dev->pdev->dev, "complete amthi write cb.\n"); | |
1350 | if (!mei_flow_ctrl_creds(dev, cl)) { | |
1351 | dev_dbg(&dev->pdev->dev, | |
1352 | "No flow control" | |
1353 | " credentials for amthi" | |
1354 | " client %d.\n", | |
1355 | cl->host_client_id); | |
1356 | continue; | |
fb7d879f | 1357 | } |
b7cd2d9f TW |
1358 | ret = _mei_irq_thread_cmpl_iamthif(dev, |
1359 | slots, | |
1360 | pos, | |
1361 | cl, | |
1362 | cmpl_list); | |
1363 | if (ret) | |
1364 | return ret; | |
fb7d879f OW |
1365 | |
1366 | } | |
b7cd2d9f | 1367 | |
fb7d879f OW |
1368 | } |
1369 | return 0; | |
1370 | } | |
1371 | ||
1372 | ||
1373 | ||
1374 | /** | |
1375 | * mei_timer - timer function. | |
1376 | * | |
1377 | * @work: pointer to the work_struct structure | |
1378 | * | |
1379 | * NOTE: This function is called by timer interrupt work | |
1380 | */ | |
a61c6530 | 1381 | void mei_timer(struct work_struct *work) |
fb7d879f OW |
1382 | { |
1383 | unsigned long timeout; | |
1384 | struct mei_cl *cl_pos = NULL; | |
1385 | struct mei_cl *cl_next = NULL; | |
1386 | struct list_head *amthi_complete_list = NULL; | |
1387 | struct mei_cl_cb *cb_pos = NULL; | |
1388 | struct mei_cl_cb *cb_next = NULL; | |
1389 | ||
1390 | struct mei_device *dev = container_of(work, | |
a61c6530 | 1391 | struct mei_device, timer_work.work); |
fb7d879f OW |
1392 | |
1393 | ||
1394 | mutex_lock(&dev->device_lock); | |
1395 | if (dev->mei_state != MEI_ENABLED) { | |
1396 | if (dev->mei_state == MEI_INIT_CLIENTS) { | |
1397 | if (dev->init_clients_timer) { | |
1398 | if (--dev->init_clients_timer == 0) { | |
1399 | dev_dbg(&dev->pdev->dev, "IMEI reset due to init clients timeout ,init clients state = %d.\n", | |
1400 | dev->init_clients_state); | |
1401 | mei_reset(dev, 1); | |
1402 | } | |
1403 | } | |
1404 | } | |
1405 | goto out; | |
1406 | } | |
1407 | /*** connect/disconnect timeouts ***/ | |
1408 | list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { | |
1409 | if (cl_pos->timer_count) { | |
1410 | if (--cl_pos->timer_count == 0) { | |
1411 | dev_dbg(&dev->pdev->dev, "HECI reset due to connect/disconnect timeout.\n"); | |
1412 | mei_reset(dev, 1); | |
1413 | goto out; | |
1414 | } | |
1415 | } | |
1416 | } | |
1417 | ||
fb7d879f OW |
1418 | if (dev->iamthif_stall_timer) { |
1419 | if (--dev->iamthif_stall_timer == 0) { | |
32de21f7 | 1420 | dev_dbg(&dev->pdev->dev, "resetting because of hang to amthi.\n"); |
fb7d879f OW |
1421 | mei_reset(dev, 1); |
1422 | dev->iamthif_msg_buf_size = 0; | |
1423 | dev->iamthif_msg_buf_index = 0; | |
eb9af0ac TW |
1424 | dev->iamthif_canceled = false; |
1425 | dev->iamthif_ioctl = true; | |
fb7d879f OW |
1426 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
1427 | dev->iamthif_timer = 0; | |
1428 | ||
1429 | if (dev->iamthif_current_cb) | |
1430 | mei_free_cb_private(dev->iamthif_current_cb); | |
1431 | ||
1432 | dev->iamthif_file_object = NULL; | |
1433 | dev->iamthif_current_cb = NULL; | |
c95efb74 | 1434 | mei_run_next_iamthif_cmd(dev); |
fb7d879f OW |
1435 | } |
1436 | } | |
1437 | ||
1438 | if (dev->iamthif_timer) { | |
1439 | ||
1440 | timeout = dev->iamthif_timer + | |
1441 | msecs_to_jiffies(IAMTHIF_READ_TIMER); | |
1442 | ||
1443 | dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n", | |
1444 | dev->iamthif_timer); | |
1445 | dev_dbg(&dev->pdev->dev, "timeout = %ld\n", timeout); | |
1446 | dev_dbg(&dev->pdev->dev, "jiffies = %ld\n", jiffies); | |
1447 | if (time_after(jiffies, timeout)) { | |
1448 | /* | |
1449 | * User didn't read the AMTHI data on time (15sec) | |
1450 | * freeing AMTHI for other requests | |
1451 | */ | |
1452 | ||
1453 | dev_dbg(&dev->pdev->dev, "freeing AMTHI for other requests\n"); | |
1454 | ||
1455 | amthi_complete_list = &dev->amthi_read_complete_list. | |
1456 | mei_cb.cb_list; | |
1457 | ||
b7cd2d9f | 1458 | list_for_each_entry_safe(cb_pos, cb_next, amthi_complete_list, cb_list) { |
fb7d879f | 1459 | |
b7cd2d9f | 1460 | cl_pos = cb_pos->file_object->private_data; |
fb7d879f | 1461 | |
b7cd2d9f TW |
1462 | /* Finding the AMTHI entry. */ |
1463 | if (cl_pos == &dev->iamthif_cl) | |
1464 | list_del(&cb_pos->cb_list); | |
fb7d879f OW |
1465 | } |
1466 | if (dev->iamthif_current_cb) | |
1467 | mei_free_cb_private(dev->iamthif_current_cb); | |
1468 | ||
1469 | dev->iamthif_file_object->private_data = NULL; | |
1470 | dev->iamthif_file_object = NULL; | |
1471 | dev->iamthif_current_cb = NULL; | |
1472 | dev->iamthif_timer = 0; | |
c95efb74 | 1473 | mei_run_next_iamthif_cmd(dev); |
fb7d879f OW |
1474 | |
1475 | } | |
1476 | } | |
1477 | out: | |
441ab50f TW |
1478 | schedule_delayed_work(&dev->timer_work, 2 * HZ); |
1479 | mutex_unlock(&dev->device_lock); | |
fb7d879f OW |
1480 | } |
1481 | ||
1482 | /** | |
1483 | * mei_interrupt_thread_handler - function called after ISR to handle the interrupt | |
1484 | * processing. | |
1485 | * | |
1486 | * @irq: The irq number | |
1487 | * @dev_id: pointer to the device structure | |
1488 | * | |
1489 | * returns irqreturn_t | |
1490 | * | |
1491 | */ | |
1492 | irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id) | |
1493 | { | |
1494 | struct mei_device *dev = (struct mei_device *) dev_id; | |
1495 | struct mei_io_list complete_list; | |
1496 | struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; | |
1497 | struct mei_cl *cl; | |
1498 | s32 slots; | |
1499 | int rets; | |
1500 | bool bus_message_received; | |
1501 | ||
1502 | ||
1503 | dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n"); | |
1504 | /* initialize our complete list */ | |
1505 | mutex_lock(&dev->device_lock); | |
0288c7c9 | 1506 | mei_io_list_init(&complete_list); |
fb7d879f | 1507 | dev->host_hw_state = mei_hcsr_read(dev); |
4f61a7ad TW |
1508 | |
1509 | /* Ack the interrupt here | |
1510 | * In case of MSI we don't go throuhg the quick handler */ | |
1511 | if (pci_dev_msi_enabled(dev->pdev)) | |
1512 | mei_reg_write(dev, H_CSR, dev->host_hw_state); | |
1513 | ||
fb7d879f OW |
1514 | dev->me_hw_state = mei_mecsr_read(dev); |
1515 | ||
1516 | /* check if ME wants a reset */ | |
1517 | if ((dev->me_hw_state & ME_RDY_HRA) == 0 && | |
1518 | dev->mei_state != MEI_RESETING && | |
1519 | dev->mei_state != MEI_INITIALIZING) { | |
1520 | dev_dbg(&dev->pdev->dev, "FW not ready.\n"); | |
1521 | mei_reset(dev, 1); | |
1522 | mutex_unlock(&dev->device_lock); | |
1523 | return IRQ_HANDLED; | |
1524 | } | |
1525 | ||
1526 | /* check if we need to start the dev */ | |
1527 | if ((dev->host_hw_state & H_RDY) == 0) { | |
1528 | if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) { | |
1529 | dev_dbg(&dev->pdev->dev, "we need to start the dev.\n"); | |
1530 | dev->host_hw_state |= (H_IE | H_IG | H_RDY); | |
1531 | mei_hcsr_set(dev); | |
1532 | dev->mei_state = MEI_INIT_CLIENTS; | |
1533 | dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n"); | |
1534 | /* link is established | |
1535 | * start sending messages. | |
1536 | */ | |
c95efb74 | 1537 | mei_host_start_message(dev); |
fb7d879f OW |
1538 | mutex_unlock(&dev->device_lock); |
1539 | return IRQ_HANDLED; | |
1540 | } else { | |
1541 | dev_dbg(&dev->pdev->dev, "FW not ready.\n"); | |
1542 | mutex_unlock(&dev->device_lock); | |
1543 | return IRQ_HANDLED; | |
1544 | } | |
1545 | } | |
1546 | /* check slots avalable for reading */ | |
1547 | slots = mei_count_full_read_slots(dev); | |
1548 | dev_dbg(&dev->pdev->dev, "slots =%08x extra_write_index =%08x.\n", | |
1549 | slots, dev->extra_write_index); | |
1550 | while (slots > 0 && !dev->extra_write_index) { | |
1551 | dev_dbg(&dev->pdev->dev, "slots =%08x extra_write_index =%08x.\n", | |
1552 | slots, dev->extra_write_index); | |
1553 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_handler.\n"); | |
1554 | rets = mei_irq_thread_read_handler(&complete_list, dev, &slots); | |
1555 | if (rets) | |
1556 | goto end; | |
1557 | } | |
1558 | rets = mei_irq_thread_write_handler(&complete_list, dev, &slots); | |
1559 | end: | |
1560 | dev_dbg(&dev->pdev->dev, "end of bottom half function.\n"); | |
1561 | dev->host_hw_state = mei_hcsr_read(dev); | |
1562 | dev->mei_host_buffer_is_empty = mei_host_buffer_is_empty(dev); | |
1563 | ||
1564 | bus_message_received = false; | |
1565 | if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) { | |
1566 | dev_dbg(&dev->pdev->dev, "received waiting bus message\n"); | |
1567 | bus_message_received = true; | |
1568 | } | |
1569 | mutex_unlock(&dev->device_lock); | |
1570 | if (bus_message_received) { | |
1571 | dev_dbg(&dev->pdev->dev, "wake up dev->wait_recvd_msg\n"); | |
1572 | wake_up_interruptible(&dev->wait_recvd_msg); | |
1573 | bus_message_received = false; | |
1574 | } | |
c8372094 | 1575 | if (list_empty(&complete_list.mei_cb.cb_list)) |
fb7d879f OW |
1576 | return IRQ_HANDLED; |
1577 | ||
1578 | ||
1579 | list_for_each_entry_safe(cb_pos, cb_next, | |
1580 | &complete_list.mei_cb.cb_list, cb_list) { | |
1581 | cl = (struct mei_cl *)cb_pos->file_private; | |
1582 | list_del(&cb_pos->cb_list); | |
1583 | if (cl) { | |
1584 | if (cl != &dev->iamthif_cl) { | |
1585 | dev_dbg(&dev->pdev->dev, "completing call back.\n"); | |
1586 | _mei_cmpl(cl, cb_pos); | |
1587 | cb_pos = NULL; | |
1588 | } else if (cl == &dev->iamthif_cl) { | |
1589 | _mei_cmpl_iamthif(dev, cb_pos); | |
1590 | } | |
1591 | } | |
1592 | } | |
1593 | return IRQ_HANDLED; | |
1594 | } |