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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" | |
4f3afe1d | 25 | #include <linux/mei.h> |
fb7d879f OW |
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 | ||
1ccb7b62 | 266 | if (((*slots) * sizeof(u32)) < (sizeof(struct mei_msg_hdr) |
fb7d879f | 267 | + sizeof(struct hbm_flow_control))) { |
fb7d879f OW |
268 | return -EMSGSIZE; |
269 | } | |
1ccb7b62 TW |
270 | *slots -= (sizeof(struct mei_msg_hdr) + |
271 | sizeof(struct hbm_flow_control) + 3) / 4; | |
272 | if (mei_send_flow_control(dev, &dev->iamthif_cl)) { | |
273 | dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n"); | |
274 | return -EIO; | |
275 | } | |
276 | ||
277 | dev_dbg(&dev->pdev->dev, "iamthif flow control success\n"); | |
278 | dev->iamthif_state = MEI_IAMTHIF_READING; | |
279 | dev->iamthif_flow_control_pending = false; | |
280 | dev->iamthif_msg_buf_index = 0; | |
281 | dev->iamthif_msg_buf_size = 0; | |
282 | dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER; | |
283 | dev->mei_host_buffer_is_empty = mei_host_buffer_is_empty(dev); | |
284 | return 0; | |
fb7d879f OW |
285 | } |
286 | ||
287 | /** | |
288 | * _mei_irq_thread_close - processes close related operation. | |
289 | * | |
290 | * @dev: the device structure. | |
291 | * @slots: free slots. | |
292 | * @cb_pos: callback block. | |
293 | * @cl: private data of the file object. | |
294 | * @cmpl_list: complete list. | |
295 | * | |
296 | * returns 0, OK; otherwise, error. | |
297 | */ | |
298 | static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots, | |
299 | struct mei_cl_cb *cb_pos, | |
300 | struct mei_cl *cl, | |
301 | struct mei_io_list *cmpl_list) | |
302 | { | |
303 | if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) + | |
304 | sizeof(struct hbm_client_disconnect_request))) { | |
305 | *slots -= (sizeof(struct mei_msg_hdr) + | |
306 | sizeof(struct hbm_client_disconnect_request) + 3) / 4; | |
307 | ||
1ccb7b62 | 308 | if (mei_disconnect(dev, cl)) { |
fb7d879f OW |
309 | cl->status = 0; |
310 | cb_pos->information = 0; | |
311 | list_move_tail(&cb_pos->cb_list, | |
312 | &cmpl_list->mei_cb.cb_list); | |
313 | return -EMSGSIZE; | |
314 | } else { | |
315 | cl->state = MEI_FILE_DISCONNECTING; | |
316 | cl->status = 0; | |
317 | cb_pos->information = 0; | |
318 | list_move_tail(&cb_pos->cb_list, | |
319 | &dev->ctrl_rd_list.mei_cb.cb_list); | |
320 | cl->timer_count = MEI_CONNECT_TIMEOUT; | |
321 | } | |
322 | } else { | |
323 | /* return the cancel routine */ | |
324 | return -EBADMSG; | |
325 | } | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
330 | /** | |
331 | * is_treat_specially_client - checks if the message belongs | |
332 | * to the file private data. | |
333 | * | |
334 | * @cl: private data of the file object | |
335 | * @rs: connect response bus message | |
336 | * | |
337 | */ | |
338 | static bool is_treat_specially_client(struct mei_cl *cl, | |
339 | struct hbm_client_connect_response *rs) | |
340 | { | |
341 | ||
342 | if (cl->host_client_id == rs->host_addr && | |
343 | cl->me_client_id == rs->me_addr) { | |
344 | if (!rs->status) { | |
345 | cl->state = MEI_FILE_CONNECTED; | |
346 | cl->status = 0; | |
347 | ||
348 | } else { | |
349 | cl->state = MEI_FILE_DISCONNECTED; | |
350 | cl->status = -ENODEV; | |
351 | } | |
352 | cl->timer_count = 0; | |
353 | ||
354 | return true; | |
355 | } | |
356 | return false; | |
357 | } | |
358 | ||
359 | /** | |
360 | * mei_client_connect_response - connects to response irq routine | |
361 | * | |
362 | * @dev: the device structure | |
363 | * @rs: connect response bus message | |
364 | */ | |
365 | static void mei_client_connect_response(struct mei_device *dev, | |
366 | struct hbm_client_connect_response *rs) | |
367 | { | |
368 | ||
369 | struct mei_cl *cl; | |
370 | struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; | |
371 | ||
372 | dev_dbg(&dev->pdev->dev, | |
373 | "connect_response:\n" | |
374 | "ME Client = %d\n" | |
375 | "Host Client = %d\n" | |
376 | "Status = %d\n", | |
377 | rs->me_addr, | |
378 | rs->host_addr, | |
379 | rs->status); | |
380 | ||
381 | /* if WD or iamthif client treat specially */ | |
382 | ||
383 | if (is_treat_specially_client(&(dev->wd_cl), rs)) { | |
fb7d879f | 384 | dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n"); |
70cd5337 | 385 | mei_watchdog_register(dev); |
9ce178e5 | 386 | |
70cd5337 | 387 | /* next step in the state maching */ |
c95efb74 | 388 | mei_host_init_iamthif(dev); |
fb7d879f OW |
389 | return; |
390 | } | |
391 | ||
392 | if (is_treat_specially_client(&(dev->iamthif_cl), rs)) { | |
393 | dev->iamthif_state = MEI_IAMTHIF_IDLE; | |
394 | return; | |
395 | } | |
b7cd2d9f TW |
396 | list_for_each_entry_safe(cb_pos, cb_next, |
397 | &dev->ctrl_rd_list.mei_cb.cb_list, cb_list) { | |
398 | ||
399 | cl = (struct mei_cl *)cb_pos->file_private; | |
400 | if (!cl) { | |
401 | list_del(&cb_pos->cb_list); | |
402 | return; | |
403 | } | |
404 | if (MEI_IOCTL == cb_pos->major_file_operations) { | |
405 | if (is_treat_specially_client(cl, rs)) { | |
fb7d879f | 406 | list_del(&cb_pos->cb_list); |
b7cd2d9f TW |
407 | cl->status = 0; |
408 | cl->timer_count = 0; | |
409 | break; | |
fb7d879f OW |
410 | } |
411 | } | |
412 | } | |
413 | } | |
414 | ||
415 | /** | |
416 | * mei_client_disconnect_response - disconnects from response irq routine | |
417 | * | |
418 | * @dev: the device structure | |
419 | * @rs: disconnect response bus message | |
420 | */ | |
421 | static void mei_client_disconnect_response(struct mei_device *dev, | |
422 | struct hbm_client_connect_response *rs) | |
423 | { | |
424 | struct mei_cl *cl; | |
425 | struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; | |
426 | ||
427 | dev_dbg(&dev->pdev->dev, | |
428 | "disconnect_response:\n" | |
429 | "ME Client = %d\n" | |
430 | "Host Client = %d\n" | |
431 | "Status = %d\n", | |
432 | rs->me_addr, | |
433 | rs->host_addr, | |
434 | rs->status); | |
435 | ||
b7cd2d9f TW |
436 | list_for_each_entry_safe(cb_pos, cb_next, |
437 | &dev->ctrl_rd_list.mei_cb.cb_list, cb_list) { | |
438 | cl = (struct mei_cl *)cb_pos->file_private; | |
fb7d879f | 439 | |
b7cd2d9f TW |
440 | if (!cl) { |
441 | list_del(&cb_pos->cb_list); | |
442 | return; | |
443 | } | |
fb7d879f | 444 | |
b7cd2d9f TW |
445 | dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n"); |
446 | if (cl->host_client_id == rs->host_addr && | |
447 | cl->me_client_id == rs->me_addr) { | |
fb7d879f | 448 | |
b7cd2d9f TW |
449 | list_del(&cb_pos->cb_list); |
450 | if (!rs->status) | |
451 | cl->state = MEI_FILE_DISCONNECTED; | |
fb7d879f | 452 | |
b7cd2d9f TW |
453 | cl->status = 0; |
454 | cl->timer_count = 0; | |
455 | break; | |
fb7d879f OW |
456 | } |
457 | } | |
458 | } | |
459 | ||
460 | /** | |
461 | * same_flow_addr - tells if they have the same address. | |
462 | * | |
463 | * @file: private data of the file object. | |
464 | * @flow: flow control. | |
465 | * | |
466 | * returns !=0, same; 0,not. | |
467 | */ | |
468 | static int same_flow_addr(struct mei_cl *cl, struct hbm_flow_control *flow) | |
469 | { | |
470 | return (cl->host_client_id == flow->host_addr && | |
471 | cl->me_client_id == flow->me_addr); | |
472 | } | |
473 | ||
474 | /** | |
475 | * add_single_flow_creds - adds single buffer credentials. | |
476 | * | |
477 | * @file: private data ot the file object. | |
478 | * @flow: flow control. | |
479 | */ | |
480 | static void add_single_flow_creds(struct mei_device *dev, | |
481 | struct hbm_flow_control *flow) | |
482 | { | |
483 | struct mei_me_client *client; | |
484 | int i; | |
485 | ||
cf9673da | 486 | for (i = 0; i < dev->me_clients_num; i++) { |
fb7d879f OW |
487 | client = &dev->me_clients[i]; |
488 | if (client && flow->me_addr == client->client_id) { | |
489 | if (client->props.single_recv_buf) { | |
490 | client->mei_flow_ctrl_creds++; | |
491 | dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", | |
492 | flow->me_addr); | |
493 | dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", | |
494 | client->mei_flow_ctrl_creds); | |
495 | } else { | |
496 | BUG(); /* error in flow control */ | |
497 | } | |
498 | } | |
499 | } | |
500 | } | |
501 | ||
502 | /** | |
503 | * mei_client_flow_control_response - flow control response irq routine | |
504 | * | |
505 | * @dev: the device structure | |
506 | * @flow_control: flow control response bus message | |
507 | */ | |
508 | static void mei_client_flow_control_response(struct mei_device *dev, | |
509 | struct hbm_flow_control *flow_control) | |
510 | { | |
511 | struct mei_cl *cl_pos = NULL; | |
512 | struct mei_cl *cl_next = NULL; | |
513 | ||
514 | if (!flow_control->host_addr) { | |
515 | /* single receive buffer */ | |
516 | add_single_flow_creds(dev, flow_control); | |
517 | } else { | |
518 | /* normal connection */ | |
519 | list_for_each_entry_safe(cl_pos, cl_next, | |
520 | &dev->file_list, link) { | |
521 | dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in file_list\n"); | |
522 | ||
523 | dev_dbg(&dev->pdev->dev, "cl of host client %d ME client %d.\n", | |
524 | cl_pos->host_client_id, | |
525 | cl_pos->me_client_id); | |
526 | dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", | |
527 | flow_control->host_addr, | |
528 | flow_control->me_addr); | |
529 | if (same_flow_addr(cl_pos, flow_control)) { | |
530 | dev_dbg(&dev->pdev->dev, "recv ctrl msg for host %d ME %d.\n", | |
531 | flow_control->host_addr, | |
532 | flow_control->me_addr); | |
533 | cl_pos->mei_flow_ctrl_creds++; | |
534 | dev_dbg(&dev->pdev->dev, "flow control credentials = %d.\n", | |
535 | cl_pos->mei_flow_ctrl_creds); | |
536 | break; | |
537 | } | |
538 | } | |
539 | } | |
540 | } | |
541 | ||
542 | /** | |
543 | * same_disconn_addr - tells if they have the same address | |
544 | * | |
545 | * @file: private data of the file object. | |
546 | * @disconn: disconnection request. | |
547 | * | |
548 | * returns !=0, same; 0,not. | |
549 | */ | |
550 | static int same_disconn_addr(struct mei_cl *cl, | |
551 | struct hbm_client_disconnect_request *disconn) | |
552 | { | |
553 | return (cl->host_client_id == disconn->host_addr && | |
554 | cl->me_client_id == disconn->me_addr); | |
555 | } | |
556 | ||
557 | /** | |
558 | * mei_client_disconnect_request - disconnects from request irq routine | |
559 | * | |
560 | * @dev: the device structure. | |
561 | * @disconnect_req: disconnect request bus message. | |
562 | */ | |
563 | static void mei_client_disconnect_request(struct mei_device *dev, | |
564 | struct hbm_client_disconnect_request *disconnect_req) | |
565 | { | |
566 | struct mei_msg_hdr *mei_hdr; | |
567 | struct hbm_client_connect_response *disconnect_res; | |
568 | struct mei_cl *cl_pos = NULL; | |
569 | struct mei_cl *cl_next = NULL; | |
570 | ||
571 | list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { | |
572 | if (same_disconn_addr(cl_pos, disconnect_req)) { | |
573 | dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", | |
574 | disconnect_req->host_addr, | |
575 | disconnect_req->me_addr); | |
576 | cl_pos->state = MEI_FILE_DISCONNECTED; | |
577 | cl_pos->timer_count = 0; | |
578 | if (cl_pos == &dev->wd_cl) { | |
579 | dev->wd_due_counter = 0; | |
eb9af0ac | 580 | dev->wd_pending = false; |
fb7d879f OW |
581 | } else if (cl_pos == &dev->iamthif_cl) |
582 | dev->iamthif_timer = 0; | |
583 | ||
584 | /* prepare disconnect response */ | |
585 | mei_hdr = | |
586 | (struct mei_msg_hdr *) &dev->ext_msg_buf[0]; | |
587 | mei_hdr->host_addr = 0; | |
588 | mei_hdr->me_addr = 0; | |
589 | mei_hdr->length = | |
590 | sizeof(struct hbm_client_connect_response); | |
591 | mei_hdr->msg_complete = 1; | |
592 | mei_hdr->reserved = 0; | |
593 | ||
594 | disconnect_res = | |
595 | (struct hbm_client_connect_response *) | |
596 | &dev->ext_msg_buf[1]; | |
597 | disconnect_res->host_addr = cl_pos->host_client_id; | |
598 | disconnect_res->me_addr = cl_pos->me_client_id; | |
1ca7e782 | 599 | disconnect_res->hbm_cmd = CLIENT_DISCONNECT_RES_CMD; |
fb7d879f OW |
600 | disconnect_res->status = 0; |
601 | dev->extra_write_index = 2; | |
602 | break; | |
603 | } | |
604 | } | |
605 | } | |
606 | ||
607 | ||
608 | /** | |
609 | * mei_irq_thread_read_bus_message - bottom half read routine after ISR to | |
610 | * handle the read bus message cmd processing. | |
611 | * | |
612 | * @dev: the device structure | |
613 | * @mei_hdr: header of bus message | |
614 | */ | |
615 | static void mei_irq_thread_read_bus_message(struct mei_device *dev, | |
616 | struct mei_msg_hdr *mei_hdr) | |
617 | { | |
618 | struct mei_bus_message *mei_msg; | |
619 | struct hbm_host_version_response *version_res; | |
620 | struct hbm_client_connect_response *connect_res; | |
621 | struct hbm_client_connect_response *disconnect_res; | |
622 | struct hbm_flow_control *flow_control; | |
623 | struct hbm_props_response *props_res; | |
624 | struct hbm_host_enum_response *enum_res; | |
625 | struct hbm_client_disconnect_request *disconnect_req; | |
626 | struct hbm_host_stop_request *host_stop_req; | |
abc51b6d | 627 | int res; |
fb7d879f | 628 | |
fb7d879f OW |
629 | |
630 | /* read the message to our buffer */ | |
fb7d879f | 631 | BUG_ON(mei_hdr->length >= sizeof(dev->rd_msg_buf)); |
edf1eed4 TW |
632 | mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length); |
633 | mei_msg = (struct mei_bus_message *)dev->rd_msg_buf; | |
fb7d879f | 634 | |
1ca7e782 | 635 | switch (mei_msg->hbm_cmd) { |
fb7d879f OW |
636 | case HOST_START_RES_CMD: |
637 | version_res = (struct hbm_host_version_response *) mei_msg; | |
638 | if (version_res->host_version_supported) { | |
639 | dev->version.major_version = HBM_MAJOR_VERSION; | |
640 | dev->version.minor_version = HBM_MINOR_VERSION; | |
641 | if (dev->mei_state == MEI_INIT_CLIENTS && | |
642 | dev->init_clients_state == MEI_START_MESSAGE) { | |
643 | dev->init_clients_timer = 0; | |
c95efb74 | 644 | mei_host_enum_clients_message(dev); |
fb7d879f | 645 | } else { |
eb9af0ac | 646 | dev->recvd_msg = false; |
fb7d879f OW |
647 | dev_dbg(&dev->pdev->dev, "IMEI reset due to received host start response bus message.\n"); |
648 | mei_reset(dev, 1); | |
649 | return; | |
650 | } | |
651 | } else { | |
652 | dev->version = version_res->me_max_version; | |
653 | /* send stop message */ | |
97d5cb09 | 654 | mei_hdr = (struct mei_msg_hdr *)&dev->wr_msg_buf[0]; |
fb7d879f OW |
655 | mei_hdr->host_addr = 0; |
656 | mei_hdr->me_addr = 0; | |
657 | mei_hdr->length = sizeof(struct hbm_host_stop_request); | |
658 | mei_hdr->msg_complete = 1; | |
659 | mei_hdr->reserved = 0; | |
660 | ||
661 | host_stop_req = (struct hbm_host_stop_request *) | |
662 | &dev->wr_msg_buf[1]; | |
663 | ||
664 | memset(host_stop_req, | |
665 | 0, | |
666 | sizeof(struct hbm_host_stop_request)); | |
1ca7e782 | 667 | host_stop_req->hbm_cmd = HOST_STOP_REQ_CMD; |
fb7d879f OW |
668 | host_stop_req->reason = DRIVER_STOP_REQUEST; |
669 | mei_write_message(dev, mei_hdr, | |
670 | (unsigned char *) (host_stop_req), | |
671 | mei_hdr->length); | |
672 | dev_dbg(&dev->pdev->dev, "version mismatch.\n"); | |
673 | return; | |
674 | } | |
675 | ||
eb9af0ac | 676 | dev->recvd_msg = true; |
fb7d879f OW |
677 | dev_dbg(&dev->pdev->dev, "host start response message received.\n"); |
678 | break; | |
679 | ||
680 | case CLIENT_CONNECT_RES_CMD: | |
681 | connect_res = | |
682 | (struct hbm_client_connect_response *) mei_msg; | |
683 | mei_client_connect_response(dev, connect_res); | |
684 | dev_dbg(&dev->pdev->dev, "client connect response message received.\n"); | |
685 | wake_up(&dev->wait_recvd_msg); | |
686 | break; | |
687 | ||
688 | case CLIENT_DISCONNECT_RES_CMD: | |
689 | disconnect_res = | |
690 | (struct hbm_client_connect_response *) mei_msg; | |
441ab50f | 691 | mei_client_disconnect_response(dev, disconnect_res); |
fb7d879f OW |
692 | dev_dbg(&dev->pdev->dev, "client disconnect response message received.\n"); |
693 | wake_up(&dev->wait_recvd_msg); | |
694 | break; | |
695 | ||
696 | case MEI_FLOW_CONTROL_CMD: | |
697 | flow_control = (struct hbm_flow_control *) mei_msg; | |
698 | mei_client_flow_control_response(dev, flow_control); | |
699 | dev_dbg(&dev->pdev->dev, "client flow control response message received.\n"); | |
700 | break; | |
701 | ||
702 | case HOST_CLIENT_PROPERTIES_RES_CMD: | |
703 | props_res = (struct hbm_props_response *)mei_msg; | |
704 | if (props_res->status || !dev->me_clients) { | |
705 | dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n"); | |
706 | mei_reset(dev, 1); | |
707 | return; | |
708 | } | |
441ab50f | 709 | if (dev->me_clients[dev->me_client_presentation_num] |
fb7d879f OW |
710 | .client_id == props_res->address) { |
711 | ||
712 | dev->me_clients[dev->me_client_presentation_num].props | |
713 | = props_res->client_properties; | |
714 | ||
715 | if (dev->mei_state == MEI_INIT_CLIENTS && | |
716 | dev->init_clients_state == | |
717 | MEI_CLIENT_PROPERTIES_MESSAGE) { | |
718 | dev->me_client_index++; | |
719 | dev->me_client_presentation_num++; | |
abc51b6d | 720 | |
5f9092f3 | 721 | /** Send Client Properties request **/ |
abc51b6d OW |
722 | res = mei_host_client_properties(dev); |
723 | if (res < 0) { | |
724 | dev_dbg(&dev->pdev->dev, "mei_host_client_properties() failed"); | |
725 | return; | |
726 | } else if (!res) { | |
727 | /* | |
728 | * No more clients to send to. | |
729 | * Clear Map for indicating now ME clients | |
730 | * with associated host client | |
731 | */ | |
732 | bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX); | |
733 | dev->open_handle_count = 0; | |
734 | ||
735 | /* | |
736 | * Reserving the first three client IDs | |
737 | * Client Id 0 - Reserved for MEI Bus Message communications | |
738 | * Client Id 1 - Reserved for Watchdog | |
739 | * Client ID 2 - Reserved for AMTHI | |
740 | */ | |
741 | bitmap_set(dev->host_clients_map, 0, 3); | |
742 | dev->mei_state = MEI_ENABLED; | |
743 | ||
744 | /* if wd initialization fails, initialization the AMTHI client, | |
745 | * otherwise the AMTHI client will be initialized after the WD client connect response | |
746 | * will be received | |
747 | */ | |
748 | if (mei_wd_host_init(dev)) | |
749 | mei_host_init_iamthif(dev); | |
750 | } | |
751 | ||
fb7d879f OW |
752 | } else { |
753 | dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message"); | |
754 | mei_reset(dev, 1); | |
755 | return; | |
756 | } | |
757 | } else { | |
758 | dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message for wrong client ID\n"); | |
759 | mei_reset(dev, 1); | |
760 | return; | |
761 | } | |
762 | break; | |
763 | ||
764 | case HOST_ENUM_RES_CMD: | |
765 | enum_res = (struct hbm_host_enum_response *) mei_msg; | |
766 | memcpy(dev->me_clients_map, enum_res->valid_addresses, 32); | |
767 | if (dev->mei_state == MEI_INIT_CLIENTS && | |
768 | dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) { | |
769 | dev->init_clients_timer = 0; | |
770 | dev->me_client_presentation_num = 0; | |
771 | dev->me_client_index = 0; | |
c95efb74 | 772 | mei_allocate_me_clients_storage(dev); |
fb7d879f OW |
773 | dev->init_clients_state = |
774 | MEI_CLIENT_PROPERTIES_MESSAGE; | |
c95efb74 | 775 | mei_host_client_properties(dev); |
fb7d879f OW |
776 | } else { |
777 | dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n"); | |
778 | mei_reset(dev, 1); | |
779 | return; | |
780 | } | |
781 | break; | |
782 | ||
783 | case HOST_STOP_RES_CMD: | |
784 | dev->mei_state = MEI_DISABLED; | |
785 | dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n"); | |
786 | mei_reset(dev, 1); | |
787 | break; | |
788 | ||
789 | case CLIENT_DISCONNECT_REQ_CMD: | |
790 | /* search for client */ | |
791 | disconnect_req = | |
792 | (struct hbm_client_disconnect_request *) mei_msg; | |
793 | mei_client_disconnect_request(dev, disconnect_req); | |
794 | break; | |
795 | ||
796 | case ME_STOP_REQ_CMD: | |
797 | /* prepare stop request */ | |
798 | mei_hdr = (struct mei_msg_hdr *) &dev->ext_msg_buf[0]; | |
799 | mei_hdr->host_addr = 0; | |
800 | mei_hdr->me_addr = 0; | |
801 | mei_hdr->length = sizeof(struct hbm_host_stop_request); | |
802 | mei_hdr->msg_complete = 1; | |
803 | mei_hdr->reserved = 0; | |
804 | host_stop_req = | |
805 | (struct hbm_host_stop_request *) &dev->ext_msg_buf[1]; | |
806 | memset(host_stop_req, 0, sizeof(struct hbm_host_stop_request)); | |
1ca7e782 | 807 | host_stop_req->hbm_cmd = HOST_STOP_REQ_CMD; |
fb7d879f OW |
808 | host_stop_req->reason = DRIVER_STOP_REQUEST; |
809 | host_stop_req->reserved[0] = 0; | |
810 | host_stop_req->reserved[1] = 0; | |
811 | dev->extra_write_index = 2; | |
812 | break; | |
813 | ||
814 | default: | |
815 | BUG(); | |
816 | break; | |
817 | ||
818 | } | |
819 | } | |
820 | ||
821 | ||
822 | /** | |
823 | * _mei_hb_read - processes read related operation. | |
824 | * | |
825 | * @dev: the device structure. | |
826 | * @slots: free slots. | |
827 | * @cb_pos: callback block. | |
828 | * @cl: private data of the file object. | |
829 | * @cmpl_list: complete list. | |
830 | * | |
831 | * returns 0, OK; otherwise, error. | |
832 | */ | |
833 | static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots, | |
834 | struct mei_cl_cb *cb_pos, | |
835 | struct mei_cl *cl, | |
836 | struct mei_io_list *cmpl_list) | |
837 | { | |
1e69d64a | 838 | if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) + |
fb7d879f | 839 | sizeof(struct hbm_flow_control))) { |
fb7d879f OW |
840 | /* return the cancel routine */ |
841 | list_del(&cb_pos->cb_list); | |
842 | return -EBADMSG; | |
843 | } | |
844 | ||
1ccb7b62 TW |
845 | *slots -= (sizeof(struct mei_msg_hdr) + |
846 | sizeof(struct hbm_flow_control) + 3) / 4; | |
847 | if (mei_send_flow_control(dev, cl)) { | |
848 | cl->status = -ENODEV; | |
849 | cb_pos->information = 0; | |
850 | list_move_tail(&cb_pos->cb_list, &cmpl_list->mei_cb.cb_list); | |
851 | return -ENODEV; | |
852 | } | |
853 | list_move_tail(&cb_pos->cb_list, &dev->read_list.mei_cb.cb_list); | |
854 | ||
fb7d879f OW |
855 | return 0; |
856 | } | |
857 | ||
858 | ||
859 | /** | |
860 | * _mei_irq_thread_ioctl - processes ioctl related operation. | |
861 | * | |
862 | * @dev: the device structure. | |
863 | * @slots: free slots. | |
864 | * @cb_pos: callback block. | |
865 | * @cl: private data of the file object. | |
866 | * @cmpl_list: complete list. | |
867 | * | |
868 | * returns 0, OK; otherwise, error. | |
869 | */ | |
870 | static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots, | |
871 | struct mei_cl_cb *cb_pos, | |
872 | struct mei_cl *cl, | |
873 | struct mei_io_list *cmpl_list) | |
874 | { | |
875 | if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) + | |
876 | sizeof(struct hbm_client_connect_request))) { | |
877 | cl->state = MEI_FILE_CONNECTING; | |
878 | *slots -= (sizeof(struct mei_msg_hdr) + | |
879 | sizeof(struct hbm_client_connect_request) + 3) / 4; | |
1ccb7b62 | 880 | if (mei_connect(dev, cl)) { |
fb7d879f OW |
881 | cl->status = -ENODEV; |
882 | cb_pos->information = 0; | |
883 | list_del(&cb_pos->cb_list); | |
884 | return -ENODEV; | |
885 | } else { | |
886 | list_move_tail(&cb_pos->cb_list, | |
887 | &dev->ctrl_rd_list.mei_cb.cb_list); | |
888 | cl->timer_count = MEI_CONNECT_TIMEOUT; | |
889 | } | |
890 | } else { | |
891 | /* return the cancel routine */ | |
892 | list_del(&cb_pos->cb_list); | |
893 | return -EBADMSG; | |
894 | } | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | /** | |
900 | * _mei_irq_thread_cmpl - processes completed and no-iamthif operation. | |
901 | * | |
902 | * @dev: the device structure. | |
903 | * @slots: free slots. | |
904 | * @cb_pos: callback block. | |
905 | * @cl: private data of the file object. | |
906 | * @cmpl_list: complete list. | |
907 | * | |
908 | * returns 0, OK; otherwise, error. | |
909 | */ | |
910 | static int _mei_irq_thread_cmpl(struct mei_device *dev, s32 *slots, | |
911 | struct mei_cl_cb *cb_pos, | |
912 | struct mei_cl *cl, | |
913 | struct mei_io_list *cmpl_list) | |
914 | { | |
915 | struct mei_msg_hdr *mei_hdr; | |
916 | ||
917 | if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) + | |
918 | (cb_pos->request_buffer.size - | |
919 | cb_pos->information))) { | |
920 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; | |
921 | mei_hdr->host_addr = cl->host_client_id; | |
922 | mei_hdr->me_addr = cl->me_client_id; | |
923 | mei_hdr->length = cb_pos->request_buffer.size - | |
924 | cb_pos->information; | |
925 | mei_hdr->msg_complete = 1; | |
926 | mei_hdr->reserved = 0; | |
927 | dev_dbg(&dev->pdev->dev, "cb_pos->request_buffer.size =%d" | |
928 | "mei_hdr->msg_complete = %d\n", | |
929 | cb_pos->request_buffer.size, | |
930 | mei_hdr->msg_complete); | |
931 | dev_dbg(&dev->pdev->dev, "cb_pos->information =%lu\n", | |
932 | cb_pos->information); | |
933 | dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", | |
934 | mei_hdr->length); | |
935 | *slots -= (sizeof(struct mei_msg_hdr) + | |
936 | mei_hdr->length + 3) / 4; | |
1ccb7b62 | 937 | if (mei_write_message(dev, mei_hdr, |
fb7d879f OW |
938 | (unsigned char *) |
939 | (cb_pos->request_buffer.data + | |
940 | cb_pos->information), | |
941 | mei_hdr->length)) { | |
942 | cl->status = -ENODEV; | |
943 | list_move_tail(&cb_pos->cb_list, | |
944 | &cmpl_list->mei_cb.cb_list); | |
945 | return -ENODEV; | |
946 | } else { | |
947 | if (mei_flow_ctrl_reduce(dev, cl)) | |
948 | return -ENODEV; | |
949 | cl->status = 0; | |
950 | cb_pos->information += mei_hdr->length; | |
951 | list_move_tail(&cb_pos->cb_list, | |
952 | &dev->write_waiting_list.mei_cb.cb_list); | |
953 | } | |
954 | } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) { | |
955 | /* buffer is still empty */ | |
956 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; | |
957 | mei_hdr->host_addr = cl->host_client_id; | |
958 | mei_hdr->me_addr = cl->me_client_id; | |
959 | mei_hdr->length = | |
960 | (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); | |
961 | mei_hdr->msg_complete = 0; | |
962 | mei_hdr->reserved = 0; | |
963 | ||
964 | (*slots) -= (sizeof(struct mei_msg_hdr) + | |
965 | mei_hdr->length + 3) / 4; | |
1ccb7b62 | 966 | if (mei_write_message(dev, mei_hdr, |
fb7d879f OW |
967 | (unsigned char *) |
968 | (cb_pos->request_buffer.data + | |
969 | cb_pos->information), | |
970 | mei_hdr->length)) { | |
971 | cl->status = -ENODEV; | |
972 | list_move_tail(&cb_pos->cb_list, | |
973 | &cmpl_list->mei_cb.cb_list); | |
974 | return -ENODEV; | |
975 | } else { | |
976 | cb_pos->information += mei_hdr->length; | |
977 | dev_dbg(&dev->pdev->dev, | |
978 | "cb_pos->request_buffer.size =%d" | |
979 | " mei_hdr->msg_complete = %d\n", | |
980 | cb_pos->request_buffer.size, | |
981 | mei_hdr->msg_complete); | |
982 | dev_dbg(&dev->pdev->dev, "cb_pos->information =%lu\n", | |
983 | cb_pos->information); | |
984 | dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", | |
985 | mei_hdr->length); | |
986 | } | |
987 | return -EMSGSIZE; | |
988 | } else { | |
989 | return -EBADMSG; | |
990 | } | |
991 | ||
992 | return 0; | |
993 | } | |
994 | ||
995 | /** | |
996 | * _mei_irq_thread_cmpl_iamthif - processes completed iamthif operation. | |
997 | * | |
998 | * @dev: the device structure. | |
999 | * @slots: free slots. | |
1000 | * @cb_pos: callback block. | |
1001 | * @cl: private data of the file object. | |
1002 | * @cmpl_list: complete list. | |
1003 | * | |
1004 | * returns 0, OK; otherwise, error. | |
1005 | */ | |
1006 | static int _mei_irq_thread_cmpl_iamthif(struct mei_device *dev, s32 *slots, | |
1007 | struct mei_cl_cb *cb_pos, | |
1008 | struct mei_cl *cl, | |
1009 | struct mei_io_list *cmpl_list) | |
1010 | { | |
1011 | struct mei_msg_hdr *mei_hdr; | |
1012 | ||
1013 | if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) + | |
1014 | dev->iamthif_msg_buf_size - | |
1015 | dev->iamthif_msg_buf_index)) { | |
1016 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; | |
1017 | mei_hdr->host_addr = cl->host_client_id; | |
1018 | mei_hdr->me_addr = cl->me_client_id; | |
1019 | mei_hdr->length = dev->iamthif_msg_buf_size - | |
1020 | dev->iamthif_msg_buf_index; | |
1021 | mei_hdr->msg_complete = 1; | |
1022 | mei_hdr->reserved = 0; | |
1023 | ||
1024 | *slots -= (sizeof(struct mei_msg_hdr) + | |
1025 | mei_hdr->length + 3) / 4; | |
1026 | ||
1ccb7b62 | 1027 | if (mei_write_message(dev, mei_hdr, |
fb7d879f OW |
1028 | (dev->iamthif_msg_buf + |
1029 | dev->iamthif_msg_buf_index), | |
1030 | mei_hdr->length)) { | |
1031 | dev->iamthif_state = MEI_IAMTHIF_IDLE; | |
1032 | cl->status = -ENODEV; | |
1033 | list_del(&cb_pos->cb_list); | |
1034 | return -ENODEV; | |
1035 | } else { | |
1036 | if (mei_flow_ctrl_reduce(dev, cl)) | |
1037 | return -ENODEV; | |
1038 | dev->iamthif_msg_buf_index += mei_hdr->length; | |
1039 | cb_pos->information = dev->iamthif_msg_buf_index; | |
1040 | cl->status = 0; | |
1041 | dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL; | |
eb9af0ac | 1042 | dev->iamthif_flow_control_pending = true; |
fb7d879f OW |
1043 | /* save iamthif cb sent to amthi client */ |
1044 | dev->iamthif_current_cb = cb_pos; | |
1045 | list_move_tail(&cb_pos->cb_list, | |
1046 | &dev->write_waiting_list.mei_cb.cb_list); | |
1047 | ||
1048 | } | |
1049 | } else if (*slots == ((dev->host_hw_state & H_CBD) >> 24)) { | |
1050 | /* buffer is still empty */ | |
1051 | mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; | |
1052 | mei_hdr->host_addr = cl->host_client_id; | |
1053 | mei_hdr->me_addr = cl->me_client_id; | |
1054 | mei_hdr->length = | |
1055 | (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); | |
1056 | mei_hdr->msg_complete = 0; | |
1057 | mei_hdr->reserved = 0; | |
1058 | ||
1059 | *slots -= (sizeof(struct mei_msg_hdr) + | |
1060 | mei_hdr->length + 3) / 4; | |
1061 | ||
1ccb7b62 | 1062 | if (mei_write_message(dev, mei_hdr, |
fb7d879f OW |
1063 | (dev->iamthif_msg_buf + |
1064 | dev->iamthif_msg_buf_index), | |
1065 | mei_hdr->length)) { | |
1066 | cl->status = -ENODEV; | |
1067 | list_del(&cb_pos->cb_list); | |
1068 | } else { | |
1069 | dev->iamthif_msg_buf_index += mei_hdr->length; | |
1070 | } | |
1071 | return -EMSGSIZE; | |
1072 | } else { | |
1073 | return -EBADMSG; | |
1074 | } | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | /** | |
1080 | * mei_irq_thread_read_handler - bottom half read routine after ISR to | |
1081 | * handle the read processing. | |
1082 | * | |
1083 | * @cmpl_list: An instance of our list structure | |
1084 | * @dev: the device structure | |
1085 | * @slots: slots to read. | |
1086 | * | |
1087 | * returns 0 on success, <0 on failure. | |
1088 | */ | |
1089 | static int mei_irq_thread_read_handler(struct mei_io_list *cmpl_list, | |
1090 | struct mei_device *dev, | |
1091 | s32 *slots) | |
1092 | { | |
1093 | struct mei_msg_hdr *mei_hdr; | |
1094 | struct mei_cl *cl_pos = NULL; | |
1095 | struct mei_cl *cl_next = NULL; | |
1096 | int ret = 0; | |
1097 | ||
1098 | if (!dev->rd_msg_hdr) { | |
1099 | dev->rd_msg_hdr = mei_mecbrw_read(dev); | |
1100 | dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots); | |
1101 | (*slots)--; | |
1102 | dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots); | |
1103 | } | |
1104 | mei_hdr = (struct mei_msg_hdr *) &dev->rd_msg_hdr; | |
1105 | dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", mei_hdr->length); | |
1106 | ||
1107 | if (mei_hdr->reserved || !dev->rd_msg_hdr) { | |
1108 | dev_dbg(&dev->pdev->dev, "corrupted message header.\n"); | |
1109 | ret = -EBADMSG; | |
1110 | goto end; | |
1111 | } | |
1112 | ||
1113 | if (mei_hdr->host_addr || mei_hdr->me_addr) { | |
1114 | list_for_each_entry_safe(cl_pos, cl_next, | |
1115 | &dev->file_list, link) { | |
1116 | dev_dbg(&dev->pdev->dev, | |
1117 | "list_for_each_entry_safe read host" | |
1118 | " client = %d, ME client = %d\n", | |
1119 | cl_pos->host_client_id, | |
1120 | cl_pos->me_client_id); | |
1121 | if (cl_pos->host_client_id == mei_hdr->host_addr && | |
1122 | cl_pos->me_client_id == mei_hdr->me_addr) | |
1123 | break; | |
1124 | } | |
1125 | ||
1126 | if (&cl_pos->link == &dev->file_list) { | |
1127 | dev_dbg(&dev->pdev->dev, "corrupted message header\n"); | |
1128 | ret = -EBADMSG; | |
1129 | goto end; | |
1130 | } | |
1131 | } | |
1132 | if (((*slots) * sizeof(u32)) < mei_hdr->length) { | |
1133 | dev_dbg(&dev->pdev->dev, | |
1134 | "we can't read the message slots =%08x.\n", | |
1135 | *slots); | |
1136 | /* we can't read the message */ | |
1137 | ret = -ERANGE; | |
1138 | goto end; | |
1139 | } | |
1140 | ||
1141 | /* decide where to read the message too */ | |
1142 | if (!mei_hdr->host_addr) { | |
1143 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_bus_message.\n"); | |
1144 | mei_irq_thread_read_bus_message(dev, mei_hdr); | |
1145 | dev_dbg(&dev->pdev->dev, "end mei_irq_thread_read_bus_message.\n"); | |
1146 | } else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id && | |
1147 | (MEI_FILE_CONNECTED == dev->iamthif_cl.state) && | |
1148 | (dev->iamthif_state == MEI_IAMTHIF_READING)) { | |
1149 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n"); | |
1150 | dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", | |
1151 | mei_hdr->length); | |
1152 | ret = mei_irq_thread_read_amthi_message(cmpl_list, | |
1153 | dev, mei_hdr); | |
1154 | if (ret) | |
1155 | goto end; | |
1156 | ||
1157 | } else { | |
1158 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_client_message.\n"); | |
1159 | ret = mei_irq_thread_read_client_message(cmpl_list, | |
1160 | dev, mei_hdr); | |
1161 | if (ret) | |
1162 | goto end; | |
1163 | ||
1164 | } | |
1165 | ||
1166 | /* reset the number of slots and header */ | |
1167 | *slots = mei_count_full_read_slots(dev); | |
1168 | dev->rd_msg_hdr = 0; | |
1169 | ||
1170 | if (*slots == -EOVERFLOW) { | |
1171 | /* overflow - reset */ | |
1172 | dev_dbg(&dev->pdev->dev, "resetting due to slots overflow.\n"); | |
1173 | /* set the event since message has been read */ | |
1174 | ret = -ERANGE; | |
1175 | goto end; | |
1176 | } | |
1177 | end: | |
1178 | return ret; | |
1179 | } | |
1180 | ||
1181 | ||
1182 | /** | |
1183 | * mei_irq_thread_write_handler - bottom half write routine after | |
1184 | * ISR to handle the write processing. | |
1185 | * | |
1186 | * @cmpl_list: An instance of our list structure | |
1187 | * @dev: the device structure | |
1188 | * @slots: slots to write. | |
1189 | * | |
1190 | * returns 0 on success, <0 on failure. | |
1191 | */ | |
1192 | static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list, | |
1193 | struct mei_device *dev, | |
1194 | s32 *slots) | |
1195 | { | |
1196 | ||
1197 | struct mei_cl *cl; | |
b7cd2d9f | 1198 | struct mei_cl_cb *pos = NULL, *next = NULL; |
fb7d879f OW |
1199 | struct mei_io_list *list; |
1200 | int ret; | |
1201 | ||
1202 | if (!mei_host_buffer_is_empty(dev)) { | |
1203 | dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n"); | |
1204 | return 0; | |
1205 | } | |
fb7d879f OW |
1206 | *slots = mei_count_empty_write_slots(dev); |
1207 | /* complete all waiting for write CB */ | |
1208 | dev_dbg(&dev->pdev->dev, "complete all waiting for write cb.\n"); | |
1209 | ||
1210 | list = &dev->write_waiting_list; | |
b7cd2d9f TW |
1211 | list_for_each_entry_safe(pos, next, |
1212 | &list->mei_cb.cb_list, cb_list) { | |
1213 | cl = (struct mei_cl *)pos->file_private; | |
1214 | if (cl == NULL) | |
1215 | continue; | |
1216 | ||
1217 | cl->status = 0; | |
1218 | list_del(&pos->cb_list); | |
1219 | if (MEI_WRITING == cl->writing_state && | |
1220 | (pos->major_file_operations == MEI_WRITE) && | |
1221 | (cl != &dev->iamthif_cl)) { | |
1222 | dev_dbg(&dev->pdev->dev, | |
1223 | "MEI WRITE COMPLETE\n"); | |
1224 | cl->writing_state = MEI_WRITE_COMPLETE; | |
1225 | list_add_tail(&pos->cb_list, | |
1226 | &cmpl_list->mei_cb.cb_list); | |
1227 | } | |
1228 | if (cl == &dev->iamthif_cl) { | |
1229 | dev_dbg(&dev->pdev->dev, "check iamthif flow control.\n"); | |
1230 | if (dev->iamthif_flow_control_pending) { | |
1231 | ret = _mei_irq_thread_iamthif_read( | |
1232 | dev, slots); | |
1233 | if (ret) | |
1234 | return ret; | |
fb7d879f | 1235 | } |
fb7d879f OW |
1236 | } |
1237 | } | |
1238 | ||
1239 | if (dev->stop && !dev->wd_pending) { | |
eb9af0ac | 1240 | dev->wd_stopped = true; |
fb7d879f OW |
1241 | wake_up_interruptible(&dev->wait_stop_wd); |
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | if (dev->extra_write_index) { | |
1246 | dev_dbg(&dev->pdev->dev, "extra_write_index =%d.\n", | |
1247 | dev->extra_write_index); | |
1248 | mei_write_message(dev, | |
1249 | (struct mei_msg_hdr *) &dev->ext_msg_buf[0], | |
1250 | (unsigned char *) &dev->ext_msg_buf[1], | |
1251 | (dev->extra_write_index - 1) * sizeof(u32)); | |
1252 | *slots -= dev->extra_write_index; | |
1253 | dev->extra_write_index = 0; | |
1254 | } | |
1255 | if (dev->mei_state == MEI_ENABLED) { | |
1256 | if (dev->wd_pending && | |
1257 | mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) { | |
1258 | if (mei_wd_send(dev)) | |
1259 | dev_dbg(&dev->pdev->dev, "wd send failed.\n"); | |
1260 | else | |
1261 | if (mei_flow_ctrl_reduce(dev, &dev->wd_cl)) | |
1262 | return -ENODEV; | |
1263 | ||
eb9af0ac | 1264 | dev->wd_pending = false; |
fb7d879f OW |
1265 | |
1266 | if (dev->wd_timeout) { | |
1267 | *slots -= (sizeof(struct mei_msg_hdr) + | |
1268 | MEI_START_WD_DATA_SIZE + 3) / 4; | |
1269 | dev->wd_due_counter = 2; | |
1270 | } else { | |
1271 | *slots -= (sizeof(struct mei_msg_hdr) + | |
1272 | MEI_WD_PARAMS_SIZE + 3) / 4; | |
1273 | dev->wd_due_counter = 0; | |
1274 | } | |
1275 | ||
1276 | } | |
1277 | } | |
1278 | if (dev->stop) | |
dc91e2f1 | 1279 | return -ENODEV; |
fb7d879f OW |
1280 | |
1281 | /* complete control write list CB */ | |
c8372094 | 1282 | dev_dbg(&dev->pdev->dev, "complete control write list cb.\n"); |
b7cd2d9f | 1283 | list_for_each_entry_safe(pos, next, |
fb7d879f | 1284 | &dev->ctrl_wr_list.mei_cb.cb_list, cb_list) { |
b7cd2d9f | 1285 | cl = (struct mei_cl *) pos->file_private; |
c8372094 | 1286 | if (!cl) { |
b7cd2d9f | 1287 | list_del(&pos->cb_list); |
c8372094 TW |
1288 | return -ENODEV; |
1289 | } | |
b7cd2d9f | 1290 | switch (pos->major_file_operations) { |
c8372094 TW |
1291 | case MEI_CLOSE: |
1292 | /* send disconnect message */ | |
b7cd2d9f | 1293 | ret = _mei_irq_thread_close(dev, slots, pos, cl, cmpl_list); |
c8372094 TW |
1294 | if (ret) |
1295 | return ret; | |
fb7d879f | 1296 | |
c8372094 TW |
1297 | break; |
1298 | case MEI_READ: | |
1299 | /* send flow control message */ | |
b7cd2d9f | 1300 | ret = _mei_irq_thread_read(dev, slots, pos, cl, cmpl_list); |
c8372094 TW |
1301 | if (ret) |
1302 | return ret; | |
fb7d879f | 1303 | |
c8372094 TW |
1304 | break; |
1305 | case MEI_IOCTL: | |
1306 | /* connect message */ | |
e8cd29d8 | 1307 | if (mei_other_client_is_connecting(dev, cl)) |
c8372094 | 1308 | continue; |
b7cd2d9f | 1309 | ret = _mei_irq_thread_ioctl(dev, slots, pos, cl, cmpl_list); |
c8372094 TW |
1310 | if (ret) |
1311 | return ret; | |
fb7d879f | 1312 | |
c8372094 | 1313 | break; |
fb7d879f | 1314 | |
c8372094 TW |
1315 | default: |
1316 | BUG(); | |
fb7d879f | 1317 | } |
c8372094 | 1318 | |
fb7d879f OW |
1319 | } |
1320 | /* complete write list CB */ | |
b7cd2d9f TW |
1321 | dev_dbg(&dev->pdev->dev, "complete write list cb.\n"); |
1322 | list_for_each_entry_safe(pos, next, | |
1323 | &dev->write_list.mei_cb.cb_list, cb_list) { | |
1324 | cl = (struct mei_cl *)pos->file_private; | |
1325 | if (cl == NULL) | |
1326 | continue; | |
1327 | ||
1328 | if (cl != &dev->iamthif_cl) { | |
1329 | if (!mei_flow_ctrl_creds(dev, cl)) { | |
1330 | dev_dbg(&dev->pdev->dev, | |
1331 | "No flow control" | |
1332 | " credentials for client" | |
1333 | " %d, not sending.\n", | |
1334 | cl->host_client_id); | |
1335 | continue; | |
1336 | } | |
1337 | ret = _mei_irq_thread_cmpl(dev, slots, | |
1338 | pos, | |
1339 | cl, cmpl_list); | |
1340 | if (ret) | |
1341 | return ret; | |
fb7d879f | 1342 | |
b7cd2d9f TW |
1343 | } else if (cl == &dev->iamthif_cl) { |
1344 | /* IAMTHIF IOCTL */ | |
1345 | dev_dbg(&dev->pdev->dev, "complete amthi write cb.\n"); | |
1346 | if (!mei_flow_ctrl_creds(dev, cl)) { | |
1347 | dev_dbg(&dev->pdev->dev, | |
1348 | "No flow control" | |
1349 | " credentials for amthi" | |
1350 | " client %d.\n", | |
1351 | cl->host_client_id); | |
1352 | continue; | |
fb7d879f | 1353 | } |
b7cd2d9f TW |
1354 | ret = _mei_irq_thread_cmpl_iamthif(dev, |
1355 | slots, | |
1356 | pos, | |
1357 | cl, | |
1358 | cmpl_list); | |
1359 | if (ret) | |
1360 | return ret; | |
fb7d879f OW |
1361 | |
1362 | } | |
b7cd2d9f | 1363 | |
fb7d879f OW |
1364 | } |
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | ||
1369 | ||
1370 | /** | |
1371 | * mei_timer - timer function. | |
1372 | * | |
1373 | * @work: pointer to the work_struct structure | |
1374 | * | |
1375 | * NOTE: This function is called by timer interrupt work | |
1376 | */ | |
a61c6530 | 1377 | void mei_timer(struct work_struct *work) |
fb7d879f OW |
1378 | { |
1379 | unsigned long timeout; | |
1380 | struct mei_cl *cl_pos = NULL; | |
1381 | struct mei_cl *cl_next = NULL; | |
1382 | struct list_head *amthi_complete_list = NULL; | |
1383 | struct mei_cl_cb *cb_pos = NULL; | |
1384 | struct mei_cl_cb *cb_next = NULL; | |
1385 | ||
1386 | struct mei_device *dev = container_of(work, | |
a61c6530 | 1387 | struct mei_device, timer_work.work); |
fb7d879f OW |
1388 | |
1389 | ||
1390 | mutex_lock(&dev->device_lock); | |
1391 | if (dev->mei_state != MEI_ENABLED) { | |
1392 | if (dev->mei_state == MEI_INIT_CLIENTS) { | |
1393 | if (dev->init_clients_timer) { | |
1394 | if (--dev->init_clients_timer == 0) { | |
1395 | dev_dbg(&dev->pdev->dev, "IMEI reset due to init clients timeout ,init clients state = %d.\n", | |
1396 | dev->init_clients_state); | |
1397 | mei_reset(dev, 1); | |
1398 | } | |
1399 | } | |
1400 | } | |
1401 | goto out; | |
1402 | } | |
1403 | /*** connect/disconnect timeouts ***/ | |
1404 | list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { | |
1405 | if (cl_pos->timer_count) { | |
1406 | if (--cl_pos->timer_count == 0) { | |
1407 | dev_dbg(&dev->pdev->dev, "HECI reset due to connect/disconnect timeout.\n"); | |
1408 | mei_reset(dev, 1); | |
1409 | goto out; | |
1410 | } | |
1411 | } | |
1412 | } | |
1413 | ||
fb7d879f OW |
1414 | if (dev->iamthif_stall_timer) { |
1415 | if (--dev->iamthif_stall_timer == 0) { | |
32de21f7 | 1416 | dev_dbg(&dev->pdev->dev, "resetting because of hang to amthi.\n"); |
fb7d879f OW |
1417 | mei_reset(dev, 1); |
1418 | dev->iamthif_msg_buf_size = 0; | |
1419 | dev->iamthif_msg_buf_index = 0; | |
eb9af0ac TW |
1420 | dev->iamthif_canceled = false; |
1421 | dev->iamthif_ioctl = true; | |
fb7d879f OW |
1422 | dev->iamthif_state = MEI_IAMTHIF_IDLE; |
1423 | dev->iamthif_timer = 0; | |
1424 | ||
1425 | if (dev->iamthif_current_cb) | |
1426 | mei_free_cb_private(dev->iamthif_current_cb); | |
1427 | ||
1428 | dev->iamthif_file_object = NULL; | |
1429 | dev->iamthif_current_cb = NULL; | |
c95efb74 | 1430 | mei_run_next_iamthif_cmd(dev); |
fb7d879f OW |
1431 | } |
1432 | } | |
1433 | ||
1434 | if (dev->iamthif_timer) { | |
1435 | ||
1436 | timeout = dev->iamthif_timer + | |
1437 | msecs_to_jiffies(IAMTHIF_READ_TIMER); | |
1438 | ||
1439 | dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n", | |
1440 | dev->iamthif_timer); | |
1441 | dev_dbg(&dev->pdev->dev, "timeout = %ld\n", timeout); | |
1442 | dev_dbg(&dev->pdev->dev, "jiffies = %ld\n", jiffies); | |
1443 | if (time_after(jiffies, timeout)) { | |
1444 | /* | |
1445 | * User didn't read the AMTHI data on time (15sec) | |
1446 | * freeing AMTHI for other requests | |
1447 | */ | |
1448 | ||
1449 | dev_dbg(&dev->pdev->dev, "freeing AMTHI for other requests\n"); | |
1450 | ||
1451 | amthi_complete_list = &dev->amthi_read_complete_list. | |
1452 | mei_cb.cb_list; | |
1453 | ||
b7cd2d9f | 1454 | list_for_each_entry_safe(cb_pos, cb_next, amthi_complete_list, cb_list) { |
fb7d879f | 1455 | |
b7cd2d9f | 1456 | cl_pos = cb_pos->file_object->private_data; |
fb7d879f | 1457 | |
b7cd2d9f TW |
1458 | /* Finding the AMTHI entry. */ |
1459 | if (cl_pos == &dev->iamthif_cl) | |
1460 | list_del(&cb_pos->cb_list); | |
fb7d879f OW |
1461 | } |
1462 | if (dev->iamthif_current_cb) | |
1463 | mei_free_cb_private(dev->iamthif_current_cb); | |
1464 | ||
1465 | dev->iamthif_file_object->private_data = NULL; | |
1466 | dev->iamthif_file_object = NULL; | |
1467 | dev->iamthif_current_cb = NULL; | |
1468 | dev->iamthif_timer = 0; | |
c95efb74 | 1469 | mei_run_next_iamthif_cmd(dev); |
fb7d879f OW |
1470 | |
1471 | } | |
1472 | } | |
1473 | out: | |
441ab50f TW |
1474 | schedule_delayed_work(&dev->timer_work, 2 * HZ); |
1475 | mutex_unlock(&dev->device_lock); | |
fb7d879f OW |
1476 | } |
1477 | ||
1478 | /** | |
1479 | * mei_interrupt_thread_handler - function called after ISR to handle the interrupt | |
1480 | * processing. | |
1481 | * | |
1482 | * @irq: The irq number | |
1483 | * @dev_id: pointer to the device structure | |
1484 | * | |
1485 | * returns irqreturn_t | |
1486 | * | |
1487 | */ | |
1488 | irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id) | |
1489 | { | |
1490 | struct mei_device *dev = (struct mei_device *) dev_id; | |
1491 | struct mei_io_list complete_list; | |
1492 | struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL; | |
1493 | struct mei_cl *cl; | |
1494 | s32 slots; | |
1495 | int rets; | |
1496 | bool bus_message_received; | |
1497 | ||
1498 | ||
1499 | dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n"); | |
1500 | /* initialize our complete list */ | |
1501 | mutex_lock(&dev->device_lock); | |
0288c7c9 | 1502 | mei_io_list_init(&complete_list); |
fb7d879f | 1503 | dev->host_hw_state = mei_hcsr_read(dev); |
4f61a7ad TW |
1504 | |
1505 | /* Ack the interrupt here | |
5f9092f3 | 1506 | * In case of MSI we don't go through the quick handler */ |
4f61a7ad TW |
1507 | if (pci_dev_msi_enabled(dev->pdev)) |
1508 | mei_reg_write(dev, H_CSR, dev->host_hw_state); | |
1509 | ||
fb7d879f OW |
1510 | dev->me_hw_state = mei_mecsr_read(dev); |
1511 | ||
1512 | /* check if ME wants a reset */ | |
1513 | if ((dev->me_hw_state & ME_RDY_HRA) == 0 && | |
1514 | dev->mei_state != MEI_RESETING && | |
1515 | dev->mei_state != MEI_INITIALIZING) { | |
1516 | dev_dbg(&dev->pdev->dev, "FW not ready.\n"); | |
1517 | mei_reset(dev, 1); | |
1518 | mutex_unlock(&dev->device_lock); | |
1519 | return IRQ_HANDLED; | |
1520 | } | |
1521 | ||
1522 | /* check if we need to start the dev */ | |
1523 | if ((dev->host_hw_state & H_RDY) == 0) { | |
1524 | if ((dev->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA) { | |
1525 | dev_dbg(&dev->pdev->dev, "we need to start the dev.\n"); | |
1526 | dev->host_hw_state |= (H_IE | H_IG | H_RDY); | |
1527 | mei_hcsr_set(dev); | |
1528 | dev->mei_state = MEI_INIT_CLIENTS; | |
1529 | dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n"); | |
1530 | /* link is established | |
1531 | * start sending messages. | |
1532 | */ | |
c95efb74 | 1533 | mei_host_start_message(dev); |
fb7d879f OW |
1534 | mutex_unlock(&dev->device_lock); |
1535 | return IRQ_HANDLED; | |
1536 | } else { | |
1537 | dev_dbg(&dev->pdev->dev, "FW not ready.\n"); | |
1538 | mutex_unlock(&dev->device_lock); | |
1539 | return IRQ_HANDLED; | |
1540 | } | |
1541 | } | |
5f9092f3 | 1542 | /* check slots available for reading */ |
fb7d879f OW |
1543 | slots = mei_count_full_read_slots(dev); |
1544 | dev_dbg(&dev->pdev->dev, "slots =%08x extra_write_index =%08x.\n", | |
1545 | slots, dev->extra_write_index); | |
1546 | while (slots > 0 && !dev->extra_write_index) { | |
1547 | dev_dbg(&dev->pdev->dev, "slots =%08x extra_write_index =%08x.\n", | |
1548 | slots, dev->extra_write_index); | |
1549 | dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_handler.\n"); | |
1550 | rets = mei_irq_thread_read_handler(&complete_list, dev, &slots); | |
1551 | if (rets) | |
1552 | goto end; | |
1553 | } | |
1554 | rets = mei_irq_thread_write_handler(&complete_list, dev, &slots); | |
1555 | end: | |
1556 | dev_dbg(&dev->pdev->dev, "end of bottom half function.\n"); | |
1557 | dev->host_hw_state = mei_hcsr_read(dev); | |
1558 | dev->mei_host_buffer_is_empty = mei_host_buffer_is_empty(dev); | |
1559 | ||
1560 | bus_message_received = false; | |
1561 | if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) { | |
1562 | dev_dbg(&dev->pdev->dev, "received waiting bus message\n"); | |
1563 | bus_message_received = true; | |
1564 | } | |
1565 | mutex_unlock(&dev->device_lock); | |
1566 | if (bus_message_received) { | |
1567 | dev_dbg(&dev->pdev->dev, "wake up dev->wait_recvd_msg\n"); | |
1568 | wake_up_interruptible(&dev->wait_recvd_msg); | |
1569 | bus_message_received = false; | |
1570 | } | |
c8372094 | 1571 | if (list_empty(&complete_list.mei_cb.cb_list)) |
fb7d879f OW |
1572 | return IRQ_HANDLED; |
1573 | ||
1574 | ||
1575 | list_for_each_entry_safe(cb_pos, cb_next, | |
1576 | &complete_list.mei_cb.cb_list, cb_list) { | |
1577 | cl = (struct mei_cl *)cb_pos->file_private; | |
1578 | list_del(&cb_pos->cb_list); | |
1579 | if (cl) { | |
1580 | if (cl != &dev->iamthif_cl) { | |
1581 | dev_dbg(&dev->pdev->dev, "completing call back.\n"); | |
1582 | _mei_cmpl(cl, cb_pos); | |
1583 | cb_pos = NULL; | |
1584 | } else if (cl == &dev->iamthif_cl) { | |
1585 | _mei_cmpl_iamthif(dev, cb_pos); | |
1586 | } | |
1587 | } | |
1588 | } | |
1589 | return IRQ_HANDLED; | |
1590 | } |