Commit | Line | Data |
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ab841160 OW |
1 | /* |
2 | * | |
3 | * Intel Management Engine Interface (Intel MEI) Linux driver | |
733ba91c | 4 | * Copyright (c) 2003-2012, Intel Corporation. |
ab841160 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 | ||
2f3d2b49 TW |
17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
18 | ||
ab841160 OW |
19 | #include <linux/module.h> |
20 | #include <linux/moduleparam.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/device.h> | |
23 | #include <linux/fs.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/types.h> | |
26 | #include <linux/fcntl.h> | |
27 | #include <linux/aio.h> | |
28 | #include <linux/pci.h> | |
29 | #include <linux/poll.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/ioctl.h> | |
32 | #include <linux/cdev.h> | |
ab841160 OW |
33 | #include <linux/sched.h> |
34 | #include <linux/uuid.h> | |
35 | #include <linux/compat.h> | |
36 | #include <linux/jiffies.h> | |
37 | #include <linux/interrupt.h> | |
5b881e3c | 38 | #include <linux/miscdevice.h> |
ab841160 OW |
39 | |
40 | #include "mei_dev.h" | |
4f3afe1d | 41 | #include <linux/mei.h> |
ab841160 | 42 | #include "interface.h" |
ab841160 | 43 | |
c38ea24e | 44 | static const char mei_driver_name[] = "mei"; |
ab841160 | 45 | |
ab841160 OW |
46 | /* The device pointer */ |
47 | /* Currently this driver works as long as there is only a single AMT device. */ | |
4a3cafd5 | 48 | struct pci_dev *mei_device; |
ab841160 | 49 | |
ab841160 OW |
50 | /* mei_pci_tbl - PCI Device ID Table */ |
51 | static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = { | |
52 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)}, | |
53 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)}, | |
54 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)}, | |
55 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G965)}, | |
56 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GM965)}, | |
57 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GME965)}, | |
58 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q35)}, | |
59 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82G33)}, | |
60 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q33)}, | |
61 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82X38)}, | |
62 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_3200)}, | |
63 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_6)}, | |
64 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_7)}, | |
65 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_8)}, | |
66 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_9)}, | |
67 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_10)}, | |
68 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_1)}, | |
69 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_2)}, | |
70 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_3)}, | |
71 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_4)}, | |
72 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_1)}, | |
73 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_2)}, | |
74 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_3)}, | |
75 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_4)}, | |
76 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_1)}, | |
77 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_2)}, | |
78 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_CPT_1)}, | |
79 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PBG_1)}, | |
80 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_1)}, | |
81 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_2)}, | |
82 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_3)}, | |
83 | ||
84 | /* required last entry */ | |
85 | {0, } | |
86 | }; | |
87 | ||
88 | MODULE_DEVICE_TABLE(pci, mei_pci_tbl); | |
89 | ||
90 | static DEFINE_MUTEX(mei_mutex); | |
91 | ||
ab841160 OW |
92 | |
93 | /** | |
94 | * mei_clear_list - removes all callbacks associated with file | |
95 | * from mei_cb_list | |
96 | * | |
97 | * @dev: device structure. | |
98 | * @file: file structure | |
99 | * @mei_cb_list: callbacks list | |
100 | * | |
101 | * mei_clear_list is called to clear resources associated with file | |
102 | * when application calls close function or Ctrl-C was pressed | |
103 | * | |
104 | * returns true if callback removed from the list, false otherwise | |
105 | */ | |
106 | static bool mei_clear_list(struct mei_device *dev, | |
107 | struct file *file, struct list_head *mei_cb_list) | |
108 | { | |
109 | struct mei_cl_cb *cb_pos = NULL; | |
110 | struct mei_cl_cb *cb_next = NULL; | |
111 | struct file *file_temp; | |
112 | bool removed = false; | |
113 | ||
114 | /* list all list member */ | |
115 | list_for_each_entry_safe(cb_pos, cb_next, mei_cb_list, cb_list) { | |
116 | file_temp = (struct file *)cb_pos->file_object; | |
117 | /* check if list member associated with a file */ | |
118 | if (file_temp == file) { | |
119 | /* remove member from the list */ | |
120 | list_del(&cb_pos->cb_list); | |
121 | /* check if cb equal to current iamthif cb */ | |
122 | if (dev->iamthif_current_cb == cb_pos) { | |
123 | dev->iamthif_current_cb = NULL; | |
124 | /* send flow control to iamthif client */ | |
125 | mei_send_flow_control(dev, &dev->iamthif_cl); | |
126 | } | |
127 | /* free all allocated buffers */ | |
128 | mei_free_cb_private(cb_pos); | |
129 | cb_pos = NULL; | |
130 | removed = true; | |
131 | } | |
132 | } | |
133 | return removed; | |
134 | } | |
135 | ||
136 | /** | |
137 | * mei_clear_lists - removes all callbacks associated with file | |
138 | * | |
139 | * @dev: device structure | |
140 | * @file: file structure | |
141 | * | |
142 | * mei_clear_lists is called to clear resources associated with file | |
143 | * when application calls close function or Ctrl-C was pressed | |
144 | * | |
145 | * returns true if callback removed from the list, false otherwise | |
146 | */ | |
147 | static bool mei_clear_lists(struct mei_device *dev, struct file *file) | |
148 | { | |
149 | bool removed = false; | |
150 | ||
151 | /* remove callbacks associated with a file */ | |
152 | mei_clear_list(dev, file, &dev->amthi_cmd_list.mei_cb.cb_list); | |
153 | if (mei_clear_list(dev, file, | |
154 | &dev->amthi_read_complete_list.mei_cb.cb_list)) | |
155 | removed = true; | |
156 | ||
157 | mei_clear_list(dev, file, &dev->ctrl_rd_list.mei_cb.cb_list); | |
158 | ||
159 | if (mei_clear_list(dev, file, &dev->ctrl_wr_list.mei_cb.cb_list)) | |
160 | removed = true; | |
161 | ||
162 | if (mei_clear_list(dev, file, &dev->write_waiting_list.mei_cb.cb_list)) | |
163 | removed = true; | |
164 | ||
165 | if (mei_clear_list(dev, file, &dev->write_list.mei_cb.cb_list)) | |
166 | removed = true; | |
167 | ||
168 | /* check if iamthif_current_cb not NULL */ | |
169 | if (dev->iamthif_current_cb && !removed) { | |
170 | /* check file and iamthif current cb association */ | |
171 | if (dev->iamthif_current_cb->file_object == file) { | |
172 | /* remove cb */ | |
173 | mei_free_cb_private(dev->iamthif_current_cb); | |
174 | dev->iamthif_current_cb = NULL; | |
175 | removed = true; | |
176 | } | |
177 | } | |
178 | return removed; | |
179 | } | |
180 | /** | |
181 | * find_read_list_entry - find read list entry | |
182 | * | |
183 | * @dev: device structure | |
184 | * @file: pointer to file structure | |
185 | * | |
186 | * returns cb on success, NULL on error | |
187 | */ | |
188 | static struct mei_cl_cb *find_read_list_entry( | |
189 | struct mei_device *dev, | |
190 | struct mei_cl *cl) | |
191 | { | |
b7cd2d9f TW |
192 | struct mei_cl_cb *pos = NULL; |
193 | struct mei_cl_cb *next = NULL; | |
ab841160 | 194 | |
b7cd2d9f TW |
195 | dev_dbg(&dev->pdev->dev, "remove read_list CB\n"); |
196 | list_for_each_entry_safe(pos, next, | |
197 | &dev->read_list.mei_cb.cb_list, cb_list) { | |
198 | struct mei_cl *cl_temp; | |
199 | cl_temp = (struct mei_cl *)pos->file_private; | |
ab841160 | 200 | |
b7cd2d9f TW |
201 | if (mei_cl_cmp_id(cl, cl_temp)) |
202 | return pos; | |
ab841160 OW |
203 | } |
204 | return NULL; | |
205 | } | |
206 | ||
207 | /** | |
208 | * mei_open - the open function | |
209 | * | |
210 | * @inode: pointer to inode structure | |
211 | * @file: pointer to file structure | |
212 | * | |
213 | * returns 0 on success, <0 on error | |
214 | */ | |
215 | static int mei_open(struct inode *inode, struct file *file) | |
216 | { | |
217 | struct mei_cl *cl; | |
ab841160 | 218 | struct mei_device *dev; |
6f37aca8 TW |
219 | unsigned long cl_id; |
220 | int err; | |
ab841160 OW |
221 | |
222 | err = -ENODEV; | |
223 | if (!mei_device) | |
224 | goto out; | |
225 | ||
226 | dev = pci_get_drvdata(mei_device); | |
5b881e3c | 227 | if (!dev) |
ab841160 OW |
228 | goto out; |
229 | ||
230 | mutex_lock(&dev->device_lock); | |
231 | err = -ENOMEM; | |
c95efb74 | 232 | cl = mei_cl_allocate(dev); |
ab841160 | 233 | if (!cl) |
303dfbf5 | 234 | goto out_unlock; |
ab841160 OW |
235 | |
236 | err = -ENODEV; | |
237 | if (dev->mei_state != MEI_ENABLED) { | |
238 | dev_dbg(&dev->pdev->dev, "mei_state != MEI_ENABLED mei_state= %d\n", | |
239 | dev->mei_state); | |
240 | goto out_unlock; | |
241 | } | |
242 | err = -EMFILE; | |
243 | if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) | |
244 | goto out_unlock; | |
245 | ||
6f37aca8 TW |
246 | cl_id = find_first_zero_bit(dev->host_clients_map, MEI_CLIENTS_MAX); |
247 | if (cl_id >= MEI_CLIENTS_MAX) | |
ab841160 OW |
248 | goto out_unlock; |
249 | ||
6f37aca8 TW |
250 | cl->host_client_id = cl_id; |
251 | ||
ab841160 OW |
252 | dev_dbg(&dev->pdev->dev, "client_id = %d\n", cl->host_client_id); |
253 | ||
254 | dev->open_handle_count++; | |
6f37aca8 | 255 | |
ab841160 OW |
256 | list_add_tail(&cl->link, &dev->file_list); |
257 | ||
258 | set_bit(cl->host_client_id, dev->host_clients_map); | |
259 | cl->state = MEI_FILE_INITIALIZING; | |
260 | cl->sm_state = 0; | |
261 | ||
262 | file->private_data = cl; | |
263 | mutex_unlock(&dev->device_lock); | |
264 | ||
5b881e3c | 265 | return nonseekable_open(inode, file); |
ab841160 OW |
266 | |
267 | out_unlock: | |
268 | mutex_unlock(&dev->device_lock); | |
269 | kfree(cl); | |
270 | out: | |
271 | return err; | |
272 | } | |
273 | ||
274 | /** | |
275 | * mei_release - the release function | |
276 | * | |
277 | * @inode: pointer to inode structure | |
278 | * @file: pointer to file structure | |
279 | * | |
280 | * returns 0 on success, <0 on error | |
281 | */ | |
282 | static int mei_release(struct inode *inode, struct file *file) | |
283 | { | |
284 | struct mei_cl *cl = file->private_data; | |
285 | struct mei_cl_cb *cb; | |
286 | struct mei_device *dev; | |
287 | int rets = 0; | |
288 | ||
289 | if (WARN_ON(!cl || !cl->dev)) | |
290 | return -ENODEV; | |
291 | ||
292 | dev = cl->dev; | |
293 | ||
294 | mutex_lock(&dev->device_lock); | |
295 | if (cl != &dev->iamthif_cl) { | |
296 | if (cl->state == MEI_FILE_CONNECTED) { | |
297 | cl->state = MEI_FILE_DISCONNECTING; | |
298 | dev_dbg(&dev->pdev->dev, | |
299 | "disconnecting client host client = %d, " | |
300 | "ME client = %d\n", | |
301 | cl->host_client_id, | |
302 | cl->me_client_id); | |
303 | rets = mei_disconnect_host_client(dev, cl); | |
304 | } | |
0288c7c9 | 305 | mei_cl_flush_queues(cl); |
ab841160 OW |
306 | dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n", |
307 | cl->host_client_id, | |
308 | cl->me_client_id); | |
309 | ||
310 | if (dev->open_handle_count > 0) { | |
441ab50f | 311 | clear_bit(cl->host_client_id, dev->host_clients_map); |
ab841160 OW |
312 | dev->open_handle_count--; |
313 | } | |
314 | mei_remove_client_from_file_list(dev, cl->host_client_id); | |
315 | ||
316 | /* free read cb */ | |
317 | cb = NULL; | |
318 | if (cl->read_cb) { | |
319 | cb = find_read_list_entry(dev, cl); | |
320 | /* Remove entry from read list */ | |
321 | if (cb) | |
322 | list_del(&cb->cb_list); | |
323 | ||
324 | cb = cl->read_cb; | |
325 | cl->read_cb = NULL; | |
326 | } | |
327 | ||
328 | file->private_data = NULL; | |
329 | ||
330 | if (cb) { | |
331 | mei_free_cb_private(cb); | |
332 | cb = NULL; | |
333 | } | |
334 | ||
335 | kfree(cl); | |
336 | } else { | |
337 | if (dev->open_handle_count > 0) | |
338 | dev->open_handle_count--; | |
339 | ||
340 | if (dev->iamthif_file_object == file && | |
341 | dev->iamthif_state != MEI_IAMTHIF_IDLE) { | |
342 | ||
343 | dev_dbg(&dev->pdev->dev, "amthi canceled iamthif state %d\n", | |
344 | dev->iamthif_state); | |
eb9af0ac | 345 | dev->iamthif_canceled = true; |
ab841160 OW |
346 | if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) { |
347 | dev_dbg(&dev->pdev->dev, "run next amthi iamthif cb\n"); | |
c95efb74 | 348 | mei_run_next_iamthif_cmd(dev); |
ab841160 OW |
349 | } |
350 | } | |
351 | ||
352 | if (mei_clear_lists(dev, file)) | |
353 | dev->iamthif_state = MEI_IAMTHIF_IDLE; | |
354 | ||
355 | } | |
356 | mutex_unlock(&dev->device_lock); | |
357 | return rets; | |
358 | } | |
359 | ||
360 | ||
361 | /** | |
362 | * mei_read - the read function. | |
363 | * | |
364 | * @file: pointer to file structure | |
365 | * @ubuf: pointer to user buffer | |
366 | * @length: buffer length | |
367 | * @offset: data offset in buffer | |
368 | * | |
369 | * returns >=0 data length on success , <0 on error | |
370 | */ | |
371 | static ssize_t mei_read(struct file *file, char __user *ubuf, | |
441ab50f | 372 | size_t length, loff_t *offset) |
ab841160 OW |
373 | { |
374 | struct mei_cl *cl = file->private_data; | |
375 | struct mei_cl_cb *cb_pos = NULL; | |
376 | struct mei_cl_cb *cb = NULL; | |
377 | struct mei_device *dev; | |
378 | int i; | |
379 | int rets; | |
380 | int err; | |
381 | ||
382 | ||
383 | if (WARN_ON(!cl || !cl->dev)) | |
384 | return -ENODEV; | |
385 | ||
386 | dev = cl->dev; | |
387 | ||
388 | mutex_lock(&dev->device_lock); | |
389 | if (dev->mei_state != MEI_ENABLED) { | |
390 | rets = -ENODEV; | |
391 | goto out; | |
392 | } | |
393 | ||
394 | if ((cl->sm_state & MEI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) { | |
395 | /* Do not allow to read watchdog client */ | |
396 | i = mei_find_me_client_index(dev, mei_wd_guid); | |
397 | if (i >= 0) { | |
398 | struct mei_me_client *me_client = &dev->me_clients[i]; | |
399 | ||
400 | if (cl->me_client_id == me_client->client_id) { | |
401 | rets = -EBADF; | |
402 | goto out; | |
403 | } | |
404 | } | |
405 | } else { | |
406 | cl->sm_state &= ~MEI_WD_STATE_INDEPENDENCE_MSG_SENT; | |
407 | } | |
408 | ||
409 | if (cl == &dev->iamthif_cl) { | |
410 | rets = amthi_read(dev, file, ubuf, length, offset); | |
411 | goto out; | |
412 | } | |
413 | ||
414 | if (cl->read_cb && cl->read_cb->information > *offset) { | |
415 | cb = cl->read_cb; | |
416 | goto copy_buffer; | |
417 | } else if (cl->read_cb && cl->read_cb->information > 0 && | |
418 | cl->read_cb->information <= *offset) { | |
419 | cb = cl->read_cb; | |
420 | rets = 0; | |
421 | goto free; | |
422 | } else if ((!cl->read_cb || !cl->read_cb->information) && | |
423 | *offset > 0) { | |
5f9092f3 | 424 | /*Offset needs to be cleaned for contiguous reads*/ |
ab841160 OW |
425 | *offset = 0; |
426 | rets = 0; | |
427 | goto out; | |
428 | } | |
429 | ||
430 | err = mei_start_read(dev, cl); | |
431 | if (err && err != -EBUSY) { | |
432 | dev_dbg(&dev->pdev->dev, | |
433 | "mei start read failure with status = %d\n", err); | |
434 | rets = err; | |
435 | goto out; | |
436 | } | |
437 | ||
438 | if (MEI_READ_COMPLETE != cl->reading_state && | |
439 | !waitqueue_active(&cl->rx_wait)) { | |
440 | if (file->f_flags & O_NONBLOCK) { | |
441 | rets = -EAGAIN; | |
442 | goto out; | |
443 | } | |
444 | ||
445 | mutex_unlock(&dev->device_lock); | |
446 | ||
447 | if (wait_event_interruptible(cl->rx_wait, | |
448 | (MEI_READ_COMPLETE == cl->reading_state || | |
449 | MEI_FILE_INITIALIZING == cl->state || | |
450 | MEI_FILE_DISCONNECTED == cl->state || | |
451 | MEI_FILE_DISCONNECTING == cl->state))) { | |
452 | if (signal_pending(current)) | |
453 | return -EINTR; | |
454 | return -ERESTARTSYS; | |
455 | } | |
456 | ||
457 | mutex_lock(&dev->device_lock); | |
458 | if (MEI_FILE_INITIALIZING == cl->state || | |
459 | MEI_FILE_DISCONNECTED == cl->state || | |
460 | MEI_FILE_DISCONNECTING == cl->state) { | |
461 | rets = -EBUSY; | |
462 | goto out; | |
463 | } | |
464 | } | |
465 | ||
466 | cb = cl->read_cb; | |
467 | ||
468 | if (!cb) { | |
469 | rets = -ENODEV; | |
470 | goto out; | |
471 | } | |
472 | if (cl->reading_state != MEI_READ_COMPLETE) { | |
473 | rets = 0; | |
474 | goto out; | |
475 | } | |
476 | /* now copy the data to user space */ | |
477 | copy_buffer: | |
478 | dev_dbg(&dev->pdev->dev, "cb->response_buffer size - %d\n", | |
479 | cb->response_buffer.size); | |
480 | dev_dbg(&dev->pdev->dev, "cb->information - %lu\n", | |
481 | cb->information); | |
482 | if (length == 0 || ubuf == NULL || *offset > cb->information) { | |
483 | rets = -EMSGSIZE; | |
484 | goto free; | |
485 | } | |
486 | ||
5f9092f3 | 487 | /* length is being truncated to PAGE_SIZE, however, */ |
ab841160 OW |
488 | /* information size may be longer */ |
489 | length = min_t(size_t, length, (cb->information - *offset)); | |
490 | ||
441ab50f | 491 | if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) { |
ab841160 OW |
492 | rets = -EFAULT; |
493 | goto free; | |
494 | } | |
495 | ||
496 | rets = length; | |
497 | *offset += length; | |
498 | if ((unsigned long)*offset < cb->information) | |
499 | goto out; | |
500 | ||
501 | free: | |
502 | cb_pos = find_read_list_entry(dev, cl); | |
503 | /* Remove entry from read list */ | |
504 | if (cb_pos) | |
505 | list_del(&cb_pos->cb_list); | |
506 | mei_free_cb_private(cb); | |
507 | cl->reading_state = MEI_IDLE; | |
508 | cl->read_cb = NULL; | |
509 | cl->read_pending = 0; | |
510 | out: | |
511 | dev_dbg(&dev->pdev->dev, "end mei read rets= %d\n", rets); | |
512 | mutex_unlock(&dev->device_lock); | |
513 | return rets; | |
514 | } | |
515 | ||
516 | /** | |
517 | * mei_write - the write function. | |
518 | * | |
519 | * @file: pointer to file structure | |
520 | * @ubuf: pointer to user buffer | |
521 | * @length: buffer length | |
522 | * @offset: data offset in buffer | |
523 | * | |
524 | * returns >=0 data length on success , <0 on error | |
525 | */ | |
526 | static ssize_t mei_write(struct file *file, const char __user *ubuf, | |
441ab50f | 527 | size_t length, loff_t *offset) |
ab841160 OW |
528 | { |
529 | struct mei_cl *cl = file->private_data; | |
530 | struct mei_cl_cb *write_cb = NULL; | |
531 | struct mei_msg_hdr mei_hdr; | |
532 | struct mei_device *dev; | |
533 | unsigned long timeout = 0; | |
534 | int rets; | |
535 | int i; | |
536 | ||
537 | if (WARN_ON(!cl || !cl->dev)) | |
538 | return -ENODEV; | |
539 | ||
540 | dev = cl->dev; | |
541 | ||
542 | mutex_lock(&dev->device_lock); | |
543 | ||
544 | if (dev->mei_state != MEI_ENABLED) { | |
545 | mutex_unlock(&dev->device_lock); | |
546 | return -ENODEV; | |
547 | } | |
548 | ||
549 | if (cl == &dev->iamthif_cl) { | |
550 | write_cb = find_amthi_read_list_entry(dev, file); | |
551 | ||
552 | if (write_cb) { | |
553 | timeout = write_cb->read_time + | |
554 | msecs_to_jiffies(IAMTHIF_READ_TIMER); | |
555 | ||
556 | if (time_after(jiffies, timeout) || | |
557 | cl->reading_state == MEI_READ_COMPLETE) { | |
558 | *offset = 0; | |
559 | list_del(&write_cb->cb_list); | |
560 | mei_free_cb_private(write_cb); | |
561 | write_cb = NULL; | |
562 | } | |
563 | } | |
564 | } | |
565 | ||
566 | /* free entry used in read */ | |
567 | if (cl->reading_state == MEI_READ_COMPLETE) { | |
568 | *offset = 0; | |
569 | write_cb = find_read_list_entry(dev, cl); | |
570 | if (write_cb) { | |
571 | list_del(&write_cb->cb_list); | |
572 | mei_free_cb_private(write_cb); | |
573 | write_cb = NULL; | |
574 | cl->reading_state = MEI_IDLE; | |
575 | cl->read_cb = NULL; | |
576 | cl->read_pending = 0; | |
577 | } | |
441ab50f | 578 | } else if (cl->reading_state == MEI_IDLE && !cl->read_pending) |
ab841160 OW |
579 | *offset = 0; |
580 | ||
581 | ||
582 | write_cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL); | |
583 | if (!write_cb) { | |
584 | mutex_unlock(&dev->device_lock); | |
585 | return -ENOMEM; | |
586 | } | |
587 | ||
588 | write_cb->file_object = file; | |
589 | write_cb->file_private = cl; | |
590 | write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL); | |
591 | rets = -ENOMEM; | |
592 | if (!write_cb->request_buffer.data) | |
593 | goto unlock_dev; | |
594 | ||
595 | dev_dbg(&dev->pdev->dev, "length =%d\n", (int) length); | |
596 | ||
597 | rets = -EFAULT; | |
598 | if (copy_from_user(write_cb->request_buffer.data, ubuf, length)) | |
599 | goto unlock_dev; | |
600 | ||
601 | cl->sm_state = 0; | |
602 | if (length == 4 && | |
603 | ((memcmp(mei_wd_state_independence_msg[0], | |
604 | write_cb->request_buffer.data, 4) == 0) || | |
605 | (memcmp(mei_wd_state_independence_msg[1], | |
606 | write_cb->request_buffer.data, 4) == 0) || | |
607 | (memcmp(mei_wd_state_independence_msg[2], | |
608 | write_cb->request_buffer.data, 4) == 0))) | |
609 | cl->sm_state |= MEI_WD_STATE_INDEPENDENCE_MSG_SENT; | |
610 | ||
611 | INIT_LIST_HEAD(&write_cb->cb_list); | |
612 | if (cl == &dev->iamthif_cl) { | |
613 | write_cb->response_buffer.data = | |
614 | kmalloc(dev->iamthif_mtu, GFP_KERNEL); | |
615 | if (!write_cb->response_buffer.data) { | |
616 | rets = -ENOMEM; | |
617 | goto unlock_dev; | |
618 | } | |
619 | if (dev->mei_state != MEI_ENABLED) { | |
620 | rets = -ENODEV; | |
621 | goto unlock_dev; | |
622 | } | |
cf9673da | 623 | for (i = 0; i < dev->me_clients_num; i++) { |
ab841160 OW |
624 | if (dev->me_clients[i].client_id == |
625 | dev->iamthif_cl.me_client_id) | |
626 | break; | |
627 | } | |
628 | ||
629 | if (WARN_ON(dev->me_clients[i].client_id != cl->me_client_id)) { | |
630 | rets = -ENODEV; | |
631 | goto unlock_dev; | |
632 | } | |
cf9673da | 633 | if (i == dev->me_clients_num || |
ab841160 OW |
634 | (dev->me_clients[i].client_id != |
635 | dev->iamthif_cl.me_client_id)) { | |
636 | rets = -ENODEV; | |
637 | goto unlock_dev; | |
638 | } else if (length > dev->me_clients[i].props.max_msg_length || | |
639 | length <= 0) { | |
640 | rets = -EMSGSIZE; | |
641 | goto unlock_dev; | |
642 | } | |
643 | ||
644 | write_cb->response_buffer.size = dev->iamthif_mtu; | |
645 | write_cb->major_file_operations = MEI_IOCTL; | |
646 | write_cb->information = 0; | |
647 | write_cb->request_buffer.size = length; | |
648 | if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) { | |
649 | rets = -ENODEV; | |
650 | goto unlock_dev; | |
651 | } | |
652 | ||
653 | if (!list_empty(&dev->amthi_cmd_list.mei_cb.cb_list) || | |
654 | dev->iamthif_state != MEI_IAMTHIF_IDLE) { | |
655 | dev_dbg(&dev->pdev->dev, "amthi_state = %d\n", | |
656 | (int) dev->iamthif_state); | |
657 | dev_dbg(&dev->pdev->dev, "add amthi cb to amthi cmd waiting list\n"); | |
658 | list_add_tail(&write_cb->cb_list, | |
659 | &dev->amthi_cmd_list.mei_cb.cb_list); | |
660 | rets = length; | |
661 | } else { | |
662 | dev_dbg(&dev->pdev->dev, "call amthi write\n"); | |
663 | rets = amthi_write(dev, write_cb); | |
664 | ||
665 | if (rets) { | |
666 | dev_dbg(&dev->pdev->dev, "amthi write failed with status = %d\n", | |
667 | rets); | |
668 | goto unlock_dev; | |
669 | } | |
670 | rets = length; | |
671 | } | |
672 | mutex_unlock(&dev->device_lock); | |
673 | return rets; | |
674 | } | |
675 | ||
676 | write_cb->major_file_operations = MEI_WRITE; | |
677 | /* make sure information is zero before we start */ | |
678 | ||
679 | write_cb->information = 0; | |
680 | write_cb->request_buffer.size = length; | |
681 | ||
682 | dev_dbg(&dev->pdev->dev, "host client = %d, ME client = %d\n", | |
683 | cl->host_client_id, cl->me_client_id); | |
684 | if (cl->state != MEI_FILE_CONNECTED) { | |
685 | rets = -ENODEV; | |
686 | dev_dbg(&dev->pdev->dev, "host client = %d, is not connected to ME client = %d", | |
687 | cl->host_client_id, | |
688 | cl->me_client_id); | |
689 | goto unlock_dev; | |
690 | } | |
cf9673da | 691 | for (i = 0; i < dev->me_clients_num; i++) { |
ab841160 OW |
692 | if (dev->me_clients[i].client_id == |
693 | cl->me_client_id) | |
694 | break; | |
695 | } | |
696 | if (WARN_ON(dev->me_clients[i].client_id != cl->me_client_id)) { | |
697 | rets = -ENODEV; | |
698 | goto unlock_dev; | |
699 | } | |
cf9673da | 700 | if (i == dev->me_clients_num) { |
ab841160 OW |
701 | rets = -ENODEV; |
702 | goto unlock_dev; | |
703 | } | |
704 | if (length > dev->me_clients[i].props.max_msg_length || length <= 0) { | |
705 | rets = -EINVAL; | |
706 | goto unlock_dev; | |
707 | } | |
708 | write_cb->file_private = cl; | |
709 | ||
710 | rets = mei_flow_ctrl_creds(dev, cl); | |
711 | if (rets < 0) | |
712 | goto unlock_dev; | |
713 | ||
714 | if (rets && dev->mei_host_buffer_is_empty) { | |
715 | rets = 0; | |
eb9af0ac | 716 | dev->mei_host_buffer_is_empty = false; |
ab841160 OW |
717 | if (length > ((((dev->host_hw_state & H_CBD) >> 24) * |
718 | sizeof(u32)) - sizeof(struct mei_msg_hdr))) { | |
719 | ||
720 | mei_hdr.length = | |
721 | (((dev->host_hw_state & H_CBD) >> 24) * | |
722 | sizeof(u32)) - | |
723 | sizeof(struct mei_msg_hdr); | |
724 | mei_hdr.msg_complete = 0; | |
725 | } else { | |
726 | mei_hdr.length = length; | |
727 | mei_hdr.msg_complete = 1; | |
728 | } | |
729 | mei_hdr.host_addr = cl->host_client_id; | |
730 | mei_hdr.me_addr = cl->me_client_id; | |
731 | mei_hdr.reserved = 0; | |
732 | dev_dbg(&dev->pdev->dev, "call mei_write_message header=%08x.\n", | |
733 | *((u32 *) &mei_hdr)); | |
1ccb7b62 | 734 | if (mei_write_message(dev, &mei_hdr, |
ab841160 OW |
735 | (unsigned char *) (write_cb->request_buffer.data), |
736 | mei_hdr.length)) { | |
737 | rets = -ENODEV; | |
738 | goto unlock_dev; | |
739 | } | |
740 | cl->writing_state = MEI_WRITING; | |
741 | write_cb->information = mei_hdr.length; | |
742 | if (mei_hdr.msg_complete) { | |
743 | if (mei_flow_ctrl_reduce(dev, cl)) { | |
744 | rets = -ENODEV; | |
745 | goto unlock_dev; | |
746 | } | |
747 | list_add_tail(&write_cb->cb_list, | |
748 | &dev->write_waiting_list.mei_cb.cb_list); | |
749 | } else { | |
750 | list_add_tail(&write_cb->cb_list, | |
751 | &dev->write_list.mei_cb.cb_list); | |
752 | } | |
753 | ||
754 | } else { | |
755 | ||
756 | write_cb->information = 0; | |
757 | cl->writing_state = MEI_WRITING; | |
758 | list_add_tail(&write_cb->cb_list, | |
759 | &dev->write_list.mei_cb.cb_list); | |
760 | } | |
761 | mutex_unlock(&dev->device_lock); | |
762 | return length; | |
763 | ||
764 | unlock_dev: | |
765 | mutex_unlock(&dev->device_lock); | |
766 | mei_free_cb_private(write_cb); | |
767 | return rets; | |
768 | } | |
769 | ||
770 | ||
771 | /** | |
772 | * mei_ioctl - the IOCTL function | |
773 | * | |
774 | * @file: pointer to file structure | |
775 | * @cmd: ioctl command | |
776 | * @data: pointer to mei message structure | |
777 | * | |
778 | * returns 0 on success , <0 on error | |
779 | */ | |
780 | static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data) | |
781 | { | |
782 | struct mei_device *dev; | |
783 | struct mei_cl *cl = file->private_data; | |
784 | struct mei_connect_client_data *connect_data = NULL; | |
785 | int rets; | |
786 | ||
787 | if (cmd != IOCTL_MEI_CONNECT_CLIENT) | |
788 | return -EINVAL; | |
789 | ||
790 | if (WARN_ON(!cl || !cl->dev)) | |
791 | return -ENODEV; | |
792 | ||
793 | dev = cl->dev; | |
794 | ||
795 | dev_dbg(&dev->pdev->dev, "IOCTL cmd = 0x%x", cmd); | |
796 | ||
797 | mutex_lock(&dev->device_lock); | |
798 | if (dev->mei_state != MEI_ENABLED) { | |
799 | rets = -ENODEV; | |
800 | goto out; | |
801 | } | |
802 | ||
803 | dev_dbg(&dev->pdev->dev, ": IOCTL_MEI_CONNECT_CLIENT.\n"); | |
804 | ||
805 | connect_data = kzalloc(sizeof(struct mei_connect_client_data), | |
806 | GFP_KERNEL); | |
807 | if (!connect_data) { | |
808 | rets = -ENOMEM; | |
809 | goto out; | |
810 | } | |
811 | dev_dbg(&dev->pdev->dev, "copy connect data from user\n"); | |
812 | if (copy_from_user(connect_data, (char __user *)data, | |
813 | sizeof(struct mei_connect_client_data))) { | |
814 | dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n"); | |
815 | rets = -EFAULT; | |
816 | goto out; | |
817 | } | |
818 | rets = mei_ioctl_connect_client(file, connect_data); | |
819 | ||
820 | /* if all is ok, copying the data back to user. */ | |
821 | if (rets) | |
822 | goto out; | |
823 | ||
824 | dev_dbg(&dev->pdev->dev, "copy connect data to user\n"); | |
825 | if (copy_to_user((char __user *)data, connect_data, | |
826 | sizeof(struct mei_connect_client_data))) { | |
827 | dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n"); | |
828 | rets = -EFAULT; | |
829 | goto out; | |
830 | } | |
831 | ||
832 | out: | |
833 | kfree(connect_data); | |
834 | mutex_unlock(&dev->device_lock); | |
835 | return rets; | |
836 | } | |
837 | ||
838 | /** | |
839 | * mei_compat_ioctl - the compat IOCTL function | |
840 | * | |
841 | * @file: pointer to file structure | |
842 | * @cmd: ioctl command | |
843 | * @data: pointer to mei message structure | |
844 | * | |
845 | * returns 0 on success , <0 on error | |
846 | */ | |
847 | #ifdef CONFIG_COMPAT | |
848 | static long mei_compat_ioctl(struct file *file, | |
441ab50f | 849 | unsigned int cmd, unsigned long data) |
ab841160 OW |
850 | { |
851 | return mei_ioctl(file, cmd, (unsigned long)compat_ptr(data)); | |
852 | } | |
853 | #endif | |
854 | ||
855 | ||
856 | /** | |
857 | * mei_poll - the poll function | |
858 | * | |
859 | * @file: pointer to file structure | |
860 | * @wait: pointer to poll_table structure | |
861 | * | |
862 | * returns poll mask | |
863 | */ | |
864 | static unsigned int mei_poll(struct file *file, poll_table *wait) | |
865 | { | |
866 | struct mei_cl *cl = file->private_data; | |
867 | struct mei_device *dev; | |
868 | unsigned int mask = 0; | |
869 | ||
870 | if (WARN_ON(!cl || !cl->dev)) | |
871 | return mask; | |
872 | ||
873 | dev = cl->dev; | |
874 | ||
875 | mutex_lock(&dev->device_lock); | |
876 | ||
877 | if (dev->mei_state != MEI_ENABLED) | |
878 | goto out; | |
879 | ||
880 | ||
881 | if (cl == &dev->iamthif_cl) { | |
882 | mutex_unlock(&dev->device_lock); | |
883 | poll_wait(file, &dev->iamthif_cl.wait, wait); | |
884 | mutex_lock(&dev->device_lock); | |
885 | if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE && | |
886 | dev->iamthif_file_object == file) { | |
887 | mask |= (POLLIN | POLLRDNORM); | |
888 | dev_dbg(&dev->pdev->dev, "run next amthi cb\n"); | |
c95efb74 | 889 | mei_run_next_iamthif_cmd(dev); |
ab841160 OW |
890 | } |
891 | goto out; | |
892 | } | |
893 | ||
894 | mutex_unlock(&dev->device_lock); | |
895 | poll_wait(file, &cl->tx_wait, wait); | |
896 | mutex_lock(&dev->device_lock); | |
897 | if (MEI_WRITE_COMPLETE == cl->writing_state) | |
898 | mask |= (POLLIN | POLLRDNORM); | |
899 | ||
900 | out: | |
901 | mutex_unlock(&dev->device_lock); | |
902 | return mask; | |
903 | } | |
904 | ||
5b881e3c OW |
905 | /* |
906 | * file operations structure will be used for mei char device. | |
907 | */ | |
908 | static const struct file_operations mei_fops = { | |
909 | .owner = THIS_MODULE, | |
910 | .read = mei_read, | |
911 | .unlocked_ioctl = mei_ioctl, | |
912 | #ifdef CONFIG_COMPAT | |
913 | .compat_ioctl = mei_compat_ioctl, | |
914 | #endif | |
915 | .open = mei_open, | |
916 | .release = mei_release, | |
917 | .write = mei_write, | |
918 | .poll = mei_poll, | |
919 | .llseek = no_llseek | |
920 | }; | |
921 | ||
922 | ||
923 | /* | |
924 | * Misc Device Struct | |
925 | */ | |
926 | static struct miscdevice mei_misc_device = { | |
c38ea24e | 927 | .name = "mei", |
5b881e3c OW |
928 | .fops = &mei_fops, |
929 | .minor = MISC_DYNAMIC_MINOR, | |
930 | }; | |
931 | ||
932 | /** | |
933 | * mei_probe - Device Initialization Routine | |
934 | * | |
935 | * @pdev: PCI device structure | |
936 | * @ent: entry in kcs_pci_tbl | |
937 | * | |
938 | * returns 0 on success, <0 on failure. | |
939 | */ | |
940 | static int __devinit mei_probe(struct pci_dev *pdev, | |
941 | const struct pci_device_id *ent) | |
942 | { | |
943 | struct mei_device *dev; | |
944 | int err; | |
945 | ||
946 | mutex_lock(&mei_mutex); | |
947 | if (mei_device) { | |
948 | err = -EEXIST; | |
949 | goto end; | |
950 | } | |
951 | /* enable pci dev */ | |
952 | err = pci_enable_device(pdev); | |
953 | if (err) { | |
32c826b6 | 954 | dev_err(&pdev->dev, "failed to enable pci device.\n"); |
5b881e3c OW |
955 | goto end; |
956 | } | |
957 | /* set PCI host mastering */ | |
958 | pci_set_master(pdev); | |
959 | /* pci request regions for mei driver */ | |
960 | err = pci_request_regions(pdev, mei_driver_name); | |
961 | if (err) { | |
32c826b6 | 962 | dev_err(&pdev->dev, "failed to get pci regions.\n"); |
5b881e3c OW |
963 | goto disable_device; |
964 | } | |
965 | /* allocates and initializes the mei dev structure */ | |
966 | dev = mei_device_init(pdev); | |
967 | if (!dev) { | |
968 | err = -ENOMEM; | |
969 | goto release_regions; | |
970 | } | |
971 | /* mapping IO device memory */ | |
972 | dev->mem_addr = pci_iomap(pdev, 0, 0); | |
973 | if (!dev->mem_addr) { | |
32c826b6 | 974 | dev_err(&pdev->dev, "mapping I/O device memory failure.\n"); |
5b881e3c OW |
975 | err = -ENOMEM; |
976 | goto free_device; | |
977 | } | |
978 | pci_enable_msi(pdev); | |
979 | ||
980 | /* request and enable interrupt */ | |
981 | if (pci_dev_msi_enabled(pdev)) | |
982 | err = request_threaded_irq(pdev->irq, | |
983 | NULL, | |
984 | mei_interrupt_thread_handler, | |
aa189ecd | 985 | IRQF_ONESHOT, mei_driver_name, dev); |
5b881e3c OW |
986 | else |
987 | err = request_threaded_irq(pdev->irq, | |
988 | mei_interrupt_quick_handler, | |
989 | mei_interrupt_thread_handler, | |
990 | IRQF_SHARED, mei_driver_name, dev); | |
991 | ||
992 | if (err) { | |
32c826b6 | 993 | dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", |
5b881e3c | 994 | pdev->irq); |
169dc388 | 995 | goto disable_msi; |
5b881e3c OW |
996 | } |
997 | INIT_DELAYED_WORK(&dev->timer_work, mei_timer); | |
998 | if (mei_hw_init(dev)) { | |
32c826b6 | 999 | dev_err(&pdev->dev, "init hw failure.\n"); |
5b881e3c OW |
1000 | err = -ENODEV; |
1001 | goto release_irq; | |
1002 | } | |
1003 | ||
1004 | err = misc_register(&mei_misc_device); | |
1005 | if (err) | |
1006 | goto release_irq; | |
1007 | ||
1008 | mei_device = pdev; | |
1009 | pci_set_drvdata(pdev, dev); | |
1010 | ||
1011 | ||
1012 | schedule_delayed_work(&dev->timer_work, HZ); | |
1013 | ||
1014 | mutex_unlock(&mei_mutex); | |
1015 | ||
2f3d2b49 | 1016 | pr_debug("initialization successful.\n"); |
5b881e3c OW |
1017 | |
1018 | return 0; | |
1019 | ||
1020 | release_irq: | |
1021 | /* disable interrupts */ | |
1022 | dev->host_hw_state = mei_hcsr_read(dev); | |
1023 | mei_disable_interrupts(dev); | |
1024 | flush_scheduled_work(); | |
1025 | free_irq(pdev->irq, dev); | |
169dc388 | 1026 | disable_msi: |
5b881e3c | 1027 | pci_disable_msi(pdev); |
5b881e3c OW |
1028 | pci_iounmap(pdev, dev->mem_addr); |
1029 | free_device: | |
1030 | kfree(dev); | |
1031 | release_regions: | |
1032 | pci_release_regions(pdev); | |
1033 | disable_device: | |
1034 | pci_disable_device(pdev); | |
1035 | end: | |
1036 | mutex_unlock(&mei_mutex); | |
32c826b6 | 1037 | dev_err(&pdev->dev, "initialization failed.\n"); |
5b881e3c OW |
1038 | return err; |
1039 | } | |
1040 | ||
1041 | /** | |
1042 | * mei_remove - Device Removal Routine | |
1043 | * | |
1044 | * @pdev: PCI device structure | |
1045 | * | |
1046 | * mei_remove is called by the PCI subsystem to alert the driver | |
1047 | * that it should release a PCI device. | |
1048 | */ | |
1049 | static void __devexit mei_remove(struct pci_dev *pdev) | |
1050 | { | |
1051 | struct mei_device *dev; | |
1052 | ||
1053 | if (mei_device != pdev) | |
1054 | return; | |
1055 | ||
1056 | dev = pci_get_drvdata(pdev); | |
1057 | if (!dev) | |
1058 | return; | |
1059 | ||
1060 | mutex_lock(&dev->device_lock); | |
1061 | ||
1062 | mei_wd_stop(dev, false); | |
1063 | ||
1064 | mei_device = NULL; | |
1065 | ||
1066 | if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) { | |
1067 | dev->iamthif_cl.state = MEI_FILE_DISCONNECTING; | |
1068 | mei_disconnect_host_client(dev, &dev->iamthif_cl); | |
1069 | } | |
1070 | if (dev->wd_cl.state == MEI_FILE_CONNECTED) { | |
1071 | dev->wd_cl.state = MEI_FILE_DISCONNECTING; | |
1072 | mei_disconnect_host_client(dev, &dev->wd_cl); | |
1073 | } | |
1074 | ||
1075 | /* Unregistering watchdog device */ | |
70cd5337 | 1076 | mei_watchdog_unregister(dev); |
5b881e3c OW |
1077 | |
1078 | /* remove entry if already in list */ | |
1079 | dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n"); | |
1080 | mei_remove_client_from_file_list(dev, dev->wd_cl.host_client_id); | |
1081 | mei_remove_client_from_file_list(dev, dev->iamthif_cl.host_client_id); | |
1082 | ||
1083 | dev->iamthif_current_cb = NULL; | |
1084 | dev->me_clients_num = 0; | |
1085 | ||
1086 | mutex_unlock(&dev->device_lock); | |
1087 | ||
1088 | flush_scheduled_work(); | |
1089 | ||
1090 | /* disable interrupts */ | |
1091 | mei_disable_interrupts(dev); | |
1092 | ||
1093 | free_irq(pdev->irq, dev); | |
1094 | pci_disable_msi(pdev); | |
1095 | pci_set_drvdata(pdev, NULL); | |
1096 | ||
1097 | if (dev->mem_addr) | |
1098 | pci_iounmap(pdev, dev->mem_addr); | |
1099 | ||
1100 | kfree(dev); | |
1101 | ||
1102 | pci_release_regions(pdev); | |
1103 | pci_disable_device(pdev); | |
a44cab4a TW |
1104 | |
1105 | misc_deregister(&mei_misc_device); | |
5b881e3c | 1106 | } |
ab841160 OW |
1107 | #ifdef CONFIG_PM |
1108 | static int mei_pci_suspend(struct device *device) | |
1109 | { | |
1110 | struct pci_dev *pdev = to_pci_dev(device); | |
1111 | struct mei_device *dev = pci_get_drvdata(pdev); | |
1112 | int err; | |
1113 | ||
1114 | if (!dev) | |
1115 | return -ENODEV; | |
1116 | mutex_lock(&dev->device_lock); | |
1117 | /* Stop watchdog if exists */ | |
1118 | err = mei_wd_stop(dev, true); | |
1119 | /* Set new mei state */ | |
1120 | if (dev->mei_state == MEI_ENABLED || | |
1121 | dev->mei_state == MEI_RECOVERING_FROM_RESET) { | |
1122 | dev->mei_state = MEI_POWER_DOWN; | |
1123 | mei_reset(dev, 0); | |
1124 | } | |
1125 | mutex_unlock(&dev->device_lock); | |
1126 | ||
1127 | free_irq(pdev->irq, dev); | |
4f61a7ad | 1128 | pci_disable_msi(pdev); |
ab841160 OW |
1129 | |
1130 | return err; | |
1131 | } | |
1132 | ||
1133 | static int mei_pci_resume(struct device *device) | |
1134 | { | |
1135 | struct pci_dev *pdev = to_pci_dev(device); | |
1136 | struct mei_device *dev; | |
1137 | int err; | |
1138 | ||
1139 | dev = pci_get_drvdata(pdev); | |
1140 | if (!dev) | |
1141 | return -ENODEV; | |
1142 | ||
4f61a7ad TW |
1143 | pci_enable_msi(pdev); |
1144 | ||
1145 | /* request and enable interrupt */ | |
1146 | if (pci_dev_msi_enabled(pdev)) | |
1147 | err = request_threaded_irq(pdev->irq, | |
1148 | NULL, | |
1149 | mei_interrupt_thread_handler, | |
1150 | 0, mei_driver_name, dev); | |
1151 | else | |
1152 | err = request_threaded_irq(pdev->irq, | |
ab841160 OW |
1153 | mei_interrupt_quick_handler, |
1154 | mei_interrupt_thread_handler, | |
1155 | IRQF_SHARED, mei_driver_name, dev); | |
4f61a7ad | 1156 | |
ab841160 | 1157 | if (err) { |
32c826b6 TW |
1158 | dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", |
1159 | pdev->irq); | |
ab841160 OW |
1160 | return err; |
1161 | } | |
1162 | ||
1163 | mutex_lock(&dev->device_lock); | |
1164 | dev->mei_state = MEI_POWER_UP; | |
1165 | mei_reset(dev, 1); | |
1166 | mutex_unlock(&dev->device_lock); | |
1167 | ||
6d70e935 OW |
1168 | /* Start timer if stopped in suspend */ |
1169 | schedule_delayed_work(&dev->timer_work, HZ); | |
1170 | ||
ab841160 OW |
1171 | return err; |
1172 | } | |
1173 | static SIMPLE_DEV_PM_OPS(mei_pm_ops, mei_pci_suspend, mei_pci_resume); | |
1174 | #define MEI_PM_OPS (&mei_pm_ops) | |
1175 | #else | |
2d990362 | 1176 | #define MEI_PM_OPS NULL |
ab841160 OW |
1177 | #endif /* CONFIG_PM */ |
1178 | /* | |
1179 | * PCI driver structure | |
1180 | */ | |
1181 | static struct pci_driver mei_driver = { | |
1182 | .name = mei_driver_name, | |
1183 | .id_table = mei_pci_tbl, | |
1184 | .probe = mei_probe, | |
1185 | .remove = __devexit_p(mei_remove), | |
1186 | .shutdown = __devexit_p(mei_remove), | |
1187 | .driver.pm = MEI_PM_OPS, | |
1188 | }; | |
1189 | ||
ab841160 OW |
1190 | /** |
1191 | * mei_init_module - Driver Registration Routine | |
1192 | * | |
1193 | * mei_init_module is the first routine called when the driver is | |
1194 | * loaded. All it does is to register with the PCI subsystem. | |
1195 | * | |
1196 | * returns 0 on success, <0 on failure. | |
1197 | */ | |
1198 | static int __init mei_init_module(void) | |
1199 | { | |
1200 | int ret; | |
1201 | ||
2f3d2b49 | 1202 | pr_debug("loading.\n"); |
ab841160 OW |
1203 | /* init pci module */ |
1204 | ret = pci_register_driver(&mei_driver); | |
5b881e3c | 1205 | if (ret < 0) |
37421275 | 1206 | pr_err("error registering driver.\n"); |
ab841160 | 1207 | |
ab841160 OW |
1208 | return ret; |
1209 | } | |
1210 | ||
1211 | module_init(mei_init_module); | |
1212 | ||
1213 | /** | |
1214 | * mei_exit_module - Driver Exit Cleanup Routine | |
1215 | * | |
1216 | * mei_exit_module is called just before the driver is removed | |
1217 | * from memory. | |
1218 | */ | |
1219 | static void __exit mei_exit_module(void) | |
1220 | { | |
cbecb8bf | 1221 | pci_unregister_driver(&mei_driver); |
ab841160 | 1222 | |
2f3d2b49 | 1223 | pr_debug("unloaded successfully.\n"); |
ab841160 OW |
1224 | } |
1225 | ||
1226 | module_exit(mei_exit_module); | |
1227 | ||
1228 | ||
1229 | MODULE_AUTHOR("Intel Corporation"); | |
1230 | MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); | |
1231 | MODULE_LICENSE("GPL v2"); |