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 | |
daed6b5e TW |
44 | /* AMT device is a singleton on the platform */ |
45 | static struct pci_dev *mei_pdev; | |
ab841160 | 46 | |
ab841160 OW |
47 | /* mei_pci_tbl - PCI Device ID Table */ |
48 | static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = { | |
49 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)}, | |
50 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)}, | |
51 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)}, | |
52 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G965)}, | |
53 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GM965)}, | |
54 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82GME965)}, | |
55 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q35)}, | |
56 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82G33)}, | |
57 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82Q33)}, | |
58 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_82X38)}, | |
59 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_3200)}, | |
60 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_6)}, | |
61 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_7)}, | |
62 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_8)}, | |
63 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_9)}, | |
64 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9_10)}, | |
65 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_1)}, | |
66 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_2)}, | |
67 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_3)}, | |
68 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH9M_4)}, | |
69 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_1)}, | |
70 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_2)}, | |
71 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_3)}, | |
72 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_ICH10_4)}, | |
73 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_1)}, | |
74 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_IBXPK_2)}, | |
75 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_CPT_1)}, | |
76 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PBG_1)}, | |
77 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_1)}, | |
78 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_2)}, | |
79 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_PPT_3)}, | |
9af51423 TW |
80 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT)}, |
81 | {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_LPT_LP)}, | |
ab841160 OW |
82 | |
83 | /* required last entry */ | |
84 | {0, } | |
85 | }; | |
86 | ||
87 | MODULE_DEVICE_TABLE(pci, mei_pci_tbl); | |
88 | ||
89 | static DEFINE_MUTEX(mei_mutex); | |
90 | ||
ab841160 OW |
91 | |
92 | /** | |
93 | * mei_clear_list - removes all callbacks associated with file | |
94 | * from mei_cb_list | |
95 | * | |
96 | * @dev: device structure. | |
97 | * @file: file structure | |
98 | * @mei_cb_list: callbacks list | |
99 | * | |
100 | * mei_clear_list is called to clear resources associated with file | |
101 | * when application calls close function or Ctrl-C was pressed | |
102 | * | |
103 | * returns true if callback removed from the list, false otherwise | |
104 | */ | |
105 | static bool mei_clear_list(struct mei_device *dev, | |
106 | struct file *file, struct list_head *mei_cb_list) | |
107 | { | |
108 | struct mei_cl_cb *cb_pos = NULL; | |
109 | struct mei_cl_cb *cb_next = NULL; | |
110 | struct file *file_temp; | |
111 | bool removed = false; | |
112 | ||
113 | /* list all list member */ | |
114 | list_for_each_entry_safe(cb_pos, cb_next, mei_cb_list, cb_list) { | |
115 | file_temp = (struct file *)cb_pos->file_object; | |
116 | /* check if list member associated with a file */ | |
117 | if (file_temp == file) { | |
118 | /* remove member from the list */ | |
119 | list_del(&cb_pos->cb_list); | |
120 | /* check if cb equal to current iamthif cb */ | |
121 | if (dev->iamthif_current_cb == cb_pos) { | |
122 | dev->iamthif_current_cb = NULL; | |
123 | /* send flow control to iamthif client */ | |
124 | mei_send_flow_control(dev, &dev->iamthif_cl); | |
125 | } | |
126 | /* free all allocated buffers */ | |
127 | mei_free_cb_private(cb_pos); | |
128 | cb_pos = NULL; | |
129 | removed = true; | |
130 | } | |
131 | } | |
132 | return removed; | |
133 | } | |
134 | ||
135 | /** | |
136 | * mei_clear_lists - removes all callbacks associated with file | |
137 | * | |
138 | * @dev: device structure | |
139 | * @file: file structure | |
140 | * | |
141 | * mei_clear_lists is called to clear resources associated with file | |
142 | * when application calls close function or Ctrl-C was pressed | |
143 | * | |
144 | * returns true if callback removed from the list, false otherwise | |
145 | */ | |
146 | static bool mei_clear_lists(struct mei_device *dev, struct file *file) | |
147 | { | |
148 | bool removed = false; | |
149 | ||
150 | /* remove callbacks associated with a file */ | |
151 | mei_clear_list(dev, file, &dev->amthi_cmd_list.mei_cb.cb_list); | |
152 | if (mei_clear_list(dev, file, | |
153 | &dev->amthi_read_complete_list.mei_cb.cb_list)) | |
154 | removed = true; | |
155 | ||
156 | mei_clear_list(dev, file, &dev->ctrl_rd_list.mei_cb.cb_list); | |
157 | ||
158 | if (mei_clear_list(dev, file, &dev->ctrl_wr_list.mei_cb.cb_list)) | |
159 | removed = true; | |
160 | ||
161 | if (mei_clear_list(dev, file, &dev->write_waiting_list.mei_cb.cb_list)) | |
162 | removed = true; | |
163 | ||
164 | if (mei_clear_list(dev, file, &dev->write_list.mei_cb.cb_list)) | |
165 | removed = true; | |
166 | ||
167 | /* check if iamthif_current_cb not NULL */ | |
168 | if (dev->iamthif_current_cb && !removed) { | |
169 | /* check file and iamthif current cb association */ | |
170 | if (dev->iamthif_current_cb->file_object == file) { | |
171 | /* remove cb */ | |
172 | mei_free_cb_private(dev->iamthif_current_cb); | |
173 | dev->iamthif_current_cb = NULL; | |
174 | removed = true; | |
175 | } | |
176 | } | |
177 | return removed; | |
178 | } | |
179 | /** | |
180 | * find_read_list_entry - find read list entry | |
181 | * | |
182 | * @dev: device structure | |
183 | * @file: pointer to file structure | |
184 | * | |
185 | * returns cb on success, NULL on error | |
186 | */ | |
187 | static struct mei_cl_cb *find_read_list_entry( | |
188 | struct mei_device *dev, | |
189 | struct mei_cl *cl) | |
190 | { | |
b7cd2d9f TW |
191 | struct mei_cl_cb *pos = NULL; |
192 | struct mei_cl_cb *next = NULL; | |
ab841160 | 193 | |
b7cd2d9f TW |
194 | dev_dbg(&dev->pdev->dev, "remove read_list CB\n"); |
195 | list_for_each_entry_safe(pos, next, | |
196 | &dev->read_list.mei_cb.cb_list, cb_list) { | |
197 | struct mei_cl *cl_temp; | |
198 | cl_temp = (struct mei_cl *)pos->file_private; | |
ab841160 | 199 | |
b7cd2d9f TW |
200 | if (mei_cl_cmp_id(cl, cl_temp)) |
201 | return pos; | |
ab841160 OW |
202 | } |
203 | return NULL; | |
204 | } | |
205 | ||
206 | /** | |
207 | * mei_open - the open function | |
208 | * | |
209 | * @inode: pointer to inode structure | |
210 | * @file: pointer to file structure | |
211 | * | |
212 | * returns 0 on success, <0 on error | |
213 | */ | |
214 | static int mei_open(struct inode *inode, struct file *file) | |
215 | { | |
216 | struct mei_cl *cl; | |
ab841160 | 217 | struct mei_device *dev; |
6f37aca8 TW |
218 | unsigned long cl_id; |
219 | int err; | |
ab841160 OW |
220 | |
221 | err = -ENODEV; | |
daed6b5e | 222 | if (!mei_pdev) |
ab841160 OW |
223 | goto out; |
224 | ||
daed6b5e | 225 | dev = pci_get_drvdata(mei_pdev); |
5b881e3c | 226 | if (!dev) |
ab841160 OW |
227 | goto out; |
228 | ||
229 | mutex_lock(&dev->device_lock); | |
230 | err = -ENOMEM; | |
c95efb74 | 231 | cl = mei_cl_allocate(dev); |
ab841160 | 232 | if (!cl) |
303dfbf5 | 233 | goto out_unlock; |
ab841160 OW |
234 | |
235 | err = -ENODEV; | |
b210d750 TW |
236 | if (dev->dev_state != MEI_DEV_ENABLED) { |
237 | dev_dbg(&dev->pdev->dev, "dev_state != MEI_ENABLED dev_state = %s\n", | |
238 | mei_dev_state_str(dev->dev_state)); | |
ab841160 OW |
239 | goto out_unlock; |
240 | } | |
241 | err = -EMFILE; | |
1b812947 TW |
242 | if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) { |
243 | dev_err(&dev->pdev->dev, "open_handle_count exceded %d", | |
244 | MEI_MAX_OPEN_HANDLE_COUNT); | |
ab841160 | 245 | goto out_unlock; |
1b812947 | 246 | } |
ab841160 | 247 | |
6f37aca8 | 248 | cl_id = find_first_zero_bit(dev->host_clients_map, MEI_CLIENTS_MAX); |
1b812947 TW |
249 | if (cl_id >= MEI_CLIENTS_MAX) { |
250 | dev_err(&dev->pdev->dev, "client_id exceded %d", | |
251 | MEI_CLIENTS_MAX) ; | |
ab841160 | 252 | goto out_unlock; |
1b812947 | 253 | } |
ab841160 | 254 | |
6f37aca8 TW |
255 | cl->host_client_id = cl_id; |
256 | ||
ab841160 OW |
257 | dev_dbg(&dev->pdev->dev, "client_id = %d\n", cl->host_client_id); |
258 | ||
259 | dev->open_handle_count++; | |
6f37aca8 | 260 | |
ab841160 OW |
261 | list_add_tail(&cl->link, &dev->file_list); |
262 | ||
263 | set_bit(cl->host_client_id, dev->host_clients_map); | |
264 | cl->state = MEI_FILE_INITIALIZING; | |
265 | cl->sm_state = 0; | |
266 | ||
267 | file->private_data = cl; | |
268 | mutex_unlock(&dev->device_lock); | |
269 | ||
5b881e3c | 270 | return nonseekable_open(inode, file); |
ab841160 OW |
271 | |
272 | out_unlock: | |
273 | mutex_unlock(&dev->device_lock); | |
274 | kfree(cl); | |
275 | out: | |
276 | return err; | |
277 | } | |
278 | ||
279 | /** | |
280 | * mei_release - the release function | |
281 | * | |
282 | * @inode: pointer to inode structure | |
283 | * @file: pointer to file structure | |
284 | * | |
285 | * returns 0 on success, <0 on error | |
286 | */ | |
287 | static int mei_release(struct inode *inode, struct file *file) | |
288 | { | |
289 | struct mei_cl *cl = file->private_data; | |
290 | struct mei_cl_cb *cb; | |
291 | struct mei_device *dev; | |
292 | int rets = 0; | |
293 | ||
294 | if (WARN_ON(!cl || !cl->dev)) | |
295 | return -ENODEV; | |
296 | ||
297 | dev = cl->dev; | |
298 | ||
299 | mutex_lock(&dev->device_lock); | |
300 | if (cl != &dev->iamthif_cl) { | |
301 | if (cl->state == MEI_FILE_CONNECTED) { | |
302 | cl->state = MEI_FILE_DISCONNECTING; | |
303 | dev_dbg(&dev->pdev->dev, | |
304 | "disconnecting client host client = %d, " | |
305 | "ME client = %d\n", | |
306 | cl->host_client_id, | |
307 | cl->me_client_id); | |
308 | rets = mei_disconnect_host_client(dev, cl); | |
309 | } | |
0288c7c9 | 310 | mei_cl_flush_queues(cl); |
ab841160 OW |
311 | dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n", |
312 | cl->host_client_id, | |
313 | cl->me_client_id); | |
314 | ||
315 | if (dev->open_handle_count > 0) { | |
441ab50f | 316 | clear_bit(cl->host_client_id, dev->host_clients_map); |
ab841160 OW |
317 | dev->open_handle_count--; |
318 | } | |
319 | mei_remove_client_from_file_list(dev, cl->host_client_id); | |
320 | ||
321 | /* free read cb */ | |
322 | cb = NULL; | |
323 | if (cl->read_cb) { | |
324 | cb = find_read_list_entry(dev, cl); | |
325 | /* Remove entry from read list */ | |
326 | if (cb) | |
327 | list_del(&cb->cb_list); | |
328 | ||
329 | cb = cl->read_cb; | |
330 | cl->read_cb = NULL; | |
331 | } | |
332 | ||
333 | file->private_data = NULL; | |
334 | ||
335 | if (cb) { | |
336 | mei_free_cb_private(cb); | |
337 | cb = NULL; | |
338 | } | |
339 | ||
340 | kfree(cl); | |
341 | } else { | |
342 | if (dev->open_handle_count > 0) | |
343 | dev->open_handle_count--; | |
344 | ||
345 | if (dev->iamthif_file_object == file && | |
346 | dev->iamthif_state != MEI_IAMTHIF_IDLE) { | |
347 | ||
348 | dev_dbg(&dev->pdev->dev, "amthi canceled iamthif state %d\n", | |
349 | dev->iamthif_state); | |
eb9af0ac | 350 | dev->iamthif_canceled = true; |
ab841160 OW |
351 | if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) { |
352 | dev_dbg(&dev->pdev->dev, "run next amthi iamthif cb\n"); | |
c95efb74 | 353 | mei_run_next_iamthif_cmd(dev); |
ab841160 OW |
354 | } |
355 | } | |
356 | ||
357 | if (mei_clear_lists(dev, file)) | |
358 | dev->iamthif_state = MEI_IAMTHIF_IDLE; | |
359 | ||
360 | } | |
361 | mutex_unlock(&dev->device_lock); | |
362 | return rets; | |
363 | } | |
364 | ||
365 | ||
366 | /** | |
367 | * mei_read - the read function. | |
368 | * | |
369 | * @file: pointer to file structure | |
370 | * @ubuf: pointer to user buffer | |
371 | * @length: buffer length | |
372 | * @offset: data offset in buffer | |
373 | * | |
374 | * returns >=0 data length on success , <0 on error | |
375 | */ | |
376 | static ssize_t mei_read(struct file *file, char __user *ubuf, | |
441ab50f | 377 | size_t length, loff_t *offset) |
ab841160 OW |
378 | { |
379 | struct mei_cl *cl = file->private_data; | |
380 | struct mei_cl_cb *cb_pos = NULL; | |
381 | struct mei_cl_cb *cb = NULL; | |
382 | struct mei_device *dev; | |
383 | int i; | |
384 | int rets; | |
385 | int err; | |
386 | ||
387 | ||
388 | if (WARN_ON(!cl || !cl->dev)) | |
389 | return -ENODEV; | |
390 | ||
391 | dev = cl->dev; | |
392 | ||
393 | mutex_lock(&dev->device_lock); | |
b210d750 | 394 | if (dev->dev_state != MEI_DEV_ENABLED) { |
ab841160 OW |
395 | rets = -ENODEV; |
396 | goto out; | |
397 | } | |
398 | ||
399 | if ((cl->sm_state & MEI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) { | |
400 | /* Do not allow to read watchdog client */ | |
07b509b7 | 401 | i = mei_me_cl_by_uuid(dev, &mei_wd_guid); |
ab841160 OW |
402 | if (i >= 0) { |
403 | struct mei_me_client *me_client = &dev->me_clients[i]; | |
ab841160 OW |
404 | if (cl->me_client_id == me_client->client_id) { |
405 | rets = -EBADF; | |
406 | goto out; | |
407 | } | |
408 | } | |
409 | } else { | |
410 | cl->sm_state &= ~MEI_WD_STATE_INDEPENDENCE_MSG_SENT; | |
411 | } | |
412 | ||
413 | if (cl == &dev->iamthif_cl) { | |
414 | rets = amthi_read(dev, file, ubuf, length, offset); | |
415 | goto out; | |
416 | } | |
417 | ||
418 | if (cl->read_cb && cl->read_cb->information > *offset) { | |
419 | cb = cl->read_cb; | |
420 | goto copy_buffer; | |
421 | } else if (cl->read_cb && cl->read_cb->information > 0 && | |
422 | cl->read_cb->information <= *offset) { | |
423 | cb = cl->read_cb; | |
424 | rets = 0; | |
425 | goto free; | |
426 | } else if ((!cl->read_cb || !cl->read_cb->information) && | |
427 | *offset > 0) { | |
5f9092f3 | 428 | /*Offset needs to be cleaned for contiguous reads*/ |
ab841160 OW |
429 | *offset = 0; |
430 | rets = 0; | |
431 | goto out; | |
432 | } | |
433 | ||
434 | err = mei_start_read(dev, cl); | |
435 | if (err && err != -EBUSY) { | |
436 | dev_dbg(&dev->pdev->dev, | |
437 | "mei start read failure with status = %d\n", err); | |
438 | rets = err; | |
439 | goto out; | |
440 | } | |
441 | ||
442 | if (MEI_READ_COMPLETE != cl->reading_state && | |
443 | !waitqueue_active(&cl->rx_wait)) { | |
444 | if (file->f_flags & O_NONBLOCK) { | |
445 | rets = -EAGAIN; | |
446 | goto out; | |
447 | } | |
448 | ||
449 | mutex_unlock(&dev->device_lock); | |
450 | ||
451 | if (wait_event_interruptible(cl->rx_wait, | |
452 | (MEI_READ_COMPLETE == cl->reading_state || | |
453 | MEI_FILE_INITIALIZING == cl->state || | |
454 | MEI_FILE_DISCONNECTED == cl->state || | |
455 | MEI_FILE_DISCONNECTING == cl->state))) { | |
456 | if (signal_pending(current)) | |
457 | return -EINTR; | |
458 | return -ERESTARTSYS; | |
459 | } | |
460 | ||
461 | mutex_lock(&dev->device_lock); | |
462 | if (MEI_FILE_INITIALIZING == cl->state || | |
463 | MEI_FILE_DISCONNECTED == cl->state || | |
464 | MEI_FILE_DISCONNECTING == cl->state) { | |
465 | rets = -EBUSY; | |
466 | goto out; | |
467 | } | |
468 | } | |
469 | ||
470 | cb = cl->read_cb; | |
471 | ||
472 | if (!cb) { | |
473 | rets = -ENODEV; | |
474 | goto out; | |
475 | } | |
476 | if (cl->reading_state != MEI_READ_COMPLETE) { | |
477 | rets = 0; | |
478 | goto out; | |
479 | } | |
480 | /* now copy the data to user space */ | |
481 | copy_buffer: | |
482 | dev_dbg(&dev->pdev->dev, "cb->response_buffer size - %d\n", | |
483 | cb->response_buffer.size); | |
484 | dev_dbg(&dev->pdev->dev, "cb->information - %lu\n", | |
485 | cb->information); | |
486 | if (length == 0 || ubuf == NULL || *offset > cb->information) { | |
487 | rets = -EMSGSIZE; | |
488 | goto free; | |
489 | } | |
490 | ||
5f9092f3 | 491 | /* length is being truncated to PAGE_SIZE, however, */ |
ab841160 OW |
492 | /* information size may be longer */ |
493 | length = min_t(size_t, length, (cb->information - *offset)); | |
494 | ||
441ab50f | 495 | if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) { |
ab841160 OW |
496 | rets = -EFAULT; |
497 | goto free; | |
498 | } | |
499 | ||
500 | rets = length; | |
501 | *offset += length; | |
502 | if ((unsigned long)*offset < cb->information) | |
503 | goto out; | |
504 | ||
505 | free: | |
506 | cb_pos = find_read_list_entry(dev, cl); | |
507 | /* Remove entry from read list */ | |
508 | if (cb_pos) | |
509 | list_del(&cb_pos->cb_list); | |
510 | mei_free_cb_private(cb); | |
511 | cl->reading_state = MEI_IDLE; | |
512 | cl->read_cb = NULL; | |
513 | cl->read_pending = 0; | |
514 | out: | |
515 | dev_dbg(&dev->pdev->dev, "end mei read rets= %d\n", rets); | |
516 | mutex_unlock(&dev->device_lock); | |
517 | return rets; | |
518 | } | |
519 | ||
520 | /** | |
521 | * mei_write - the write function. | |
522 | * | |
523 | * @file: pointer to file structure | |
524 | * @ubuf: pointer to user buffer | |
525 | * @length: buffer length | |
526 | * @offset: data offset in buffer | |
527 | * | |
528 | * returns >=0 data length on success , <0 on error | |
529 | */ | |
530 | static ssize_t mei_write(struct file *file, const char __user *ubuf, | |
441ab50f | 531 | size_t length, loff_t *offset) |
ab841160 OW |
532 | { |
533 | struct mei_cl *cl = file->private_data; | |
534 | struct mei_cl_cb *write_cb = NULL; | |
535 | struct mei_msg_hdr mei_hdr; | |
536 | struct mei_device *dev; | |
537 | unsigned long timeout = 0; | |
538 | int rets; | |
539 | int i; | |
540 | ||
541 | if (WARN_ON(!cl || !cl->dev)) | |
542 | return -ENODEV; | |
543 | ||
544 | dev = cl->dev; | |
545 | ||
546 | mutex_lock(&dev->device_lock); | |
547 | ||
b210d750 | 548 | if (dev->dev_state != MEI_DEV_ENABLED) { |
ab841160 OW |
549 | mutex_unlock(&dev->device_lock); |
550 | return -ENODEV; | |
551 | } | |
552 | ||
553 | if (cl == &dev->iamthif_cl) { | |
554 | write_cb = find_amthi_read_list_entry(dev, file); | |
555 | ||
556 | if (write_cb) { | |
557 | timeout = write_cb->read_time + | |
558 | msecs_to_jiffies(IAMTHIF_READ_TIMER); | |
559 | ||
560 | if (time_after(jiffies, timeout) || | |
561 | cl->reading_state == MEI_READ_COMPLETE) { | |
562 | *offset = 0; | |
563 | list_del(&write_cb->cb_list); | |
564 | mei_free_cb_private(write_cb); | |
565 | write_cb = NULL; | |
566 | } | |
567 | } | |
568 | } | |
569 | ||
570 | /* free entry used in read */ | |
571 | if (cl->reading_state == MEI_READ_COMPLETE) { | |
572 | *offset = 0; | |
573 | write_cb = find_read_list_entry(dev, cl); | |
574 | if (write_cb) { | |
575 | list_del(&write_cb->cb_list); | |
576 | mei_free_cb_private(write_cb); | |
577 | write_cb = NULL; | |
578 | cl->reading_state = MEI_IDLE; | |
579 | cl->read_cb = NULL; | |
580 | cl->read_pending = 0; | |
581 | } | |
441ab50f | 582 | } else if (cl->reading_state == MEI_IDLE && !cl->read_pending) |
ab841160 OW |
583 | *offset = 0; |
584 | ||
585 | ||
586 | write_cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL); | |
587 | if (!write_cb) { | |
588 | mutex_unlock(&dev->device_lock); | |
589 | return -ENOMEM; | |
590 | } | |
591 | ||
592 | write_cb->file_object = file; | |
593 | write_cb->file_private = cl; | |
594 | write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL); | |
595 | rets = -ENOMEM; | |
596 | if (!write_cb->request_buffer.data) | |
597 | goto unlock_dev; | |
598 | ||
599 | dev_dbg(&dev->pdev->dev, "length =%d\n", (int) length); | |
600 | ||
601 | rets = -EFAULT; | |
602 | if (copy_from_user(write_cb->request_buffer.data, ubuf, length)) | |
603 | goto unlock_dev; | |
604 | ||
605 | cl->sm_state = 0; | |
606 | if (length == 4 && | |
607 | ((memcmp(mei_wd_state_independence_msg[0], | |
608 | write_cb->request_buffer.data, 4) == 0) || | |
609 | (memcmp(mei_wd_state_independence_msg[1], | |
610 | write_cb->request_buffer.data, 4) == 0) || | |
611 | (memcmp(mei_wd_state_independence_msg[2], | |
612 | write_cb->request_buffer.data, 4) == 0))) | |
613 | cl->sm_state |= MEI_WD_STATE_INDEPENDENCE_MSG_SENT; | |
614 | ||
615 | INIT_LIST_HEAD(&write_cb->cb_list); | |
616 | if (cl == &dev->iamthif_cl) { | |
617 | write_cb->response_buffer.data = | |
618 | kmalloc(dev->iamthif_mtu, GFP_KERNEL); | |
619 | if (!write_cb->response_buffer.data) { | |
620 | rets = -ENOMEM; | |
621 | goto unlock_dev; | |
622 | } | |
b210d750 | 623 | if (dev->dev_state != MEI_DEV_ENABLED) { |
ab841160 OW |
624 | rets = -ENODEV; |
625 | goto unlock_dev; | |
626 | } | |
07b509b7 TW |
627 | i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id); |
628 | if (i < 0) { | |
ab841160 OW |
629 | rets = -ENODEV; |
630 | goto unlock_dev; | |
631 | } | |
07b509b7 | 632 | if (length > dev->me_clients[i].props.max_msg_length || |
ab841160 OW |
633 | length <= 0) { |
634 | rets = -EMSGSIZE; | |
635 | goto unlock_dev; | |
636 | } | |
637 | ||
638 | write_cb->response_buffer.size = dev->iamthif_mtu; | |
639 | write_cb->major_file_operations = MEI_IOCTL; | |
640 | write_cb->information = 0; | |
641 | write_cb->request_buffer.size = length; | |
642 | if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) { | |
643 | rets = -ENODEV; | |
644 | goto unlock_dev; | |
645 | } | |
646 | ||
647 | if (!list_empty(&dev->amthi_cmd_list.mei_cb.cb_list) || | |
648 | dev->iamthif_state != MEI_IAMTHIF_IDLE) { | |
649 | dev_dbg(&dev->pdev->dev, "amthi_state = %d\n", | |
650 | (int) dev->iamthif_state); | |
651 | dev_dbg(&dev->pdev->dev, "add amthi cb to amthi cmd waiting list\n"); | |
652 | list_add_tail(&write_cb->cb_list, | |
653 | &dev->amthi_cmd_list.mei_cb.cb_list); | |
654 | rets = length; | |
655 | } else { | |
656 | dev_dbg(&dev->pdev->dev, "call amthi write\n"); | |
657 | rets = amthi_write(dev, write_cb); | |
658 | ||
659 | if (rets) { | |
660 | dev_dbg(&dev->pdev->dev, "amthi write failed with status = %d\n", | |
661 | rets); | |
662 | goto unlock_dev; | |
663 | } | |
664 | rets = length; | |
665 | } | |
666 | mutex_unlock(&dev->device_lock); | |
667 | return rets; | |
668 | } | |
669 | ||
670 | write_cb->major_file_operations = MEI_WRITE; | |
671 | /* make sure information is zero before we start */ | |
672 | ||
673 | write_cb->information = 0; | |
674 | write_cb->request_buffer.size = length; | |
675 | ||
676 | dev_dbg(&dev->pdev->dev, "host client = %d, ME client = %d\n", | |
677 | cl->host_client_id, cl->me_client_id); | |
678 | if (cl->state != MEI_FILE_CONNECTED) { | |
679 | rets = -ENODEV; | |
680 | dev_dbg(&dev->pdev->dev, "host client = %d, is not connected to ME client = %d", | |
681 | cl->host_client_id, | |
682 | cl->me_client_id); | |
683 | goto unlock_dev; | |
684 | } | |
07b509b7 TW |
685 | i = mei_me_cl_by_id(dev, cl->me_client_id); |
686 | if (i < 0) { | |
ab841160 OW |
687 | rets = -ENODEV; |
688 | goto unlock_dev; | |
689 | } | |
690 | if (length > dev->me_clients[i].props.max_msg_length || length <= 0) { | |
691 | rets = -EINVAL; | |
692 | goto unlock_dev; | |
693 | } | |
694 | write_cb->file_private = cl; | |
695 | ||
696 | rets = mei_flow_ctrl_creds(dev, cl); | |
697 | if (rets < 0) | |
698 | goto unlock_dev; | |
699 | ||
700 | if (rets && dev->mei_host_buffer_is_empty) { | |
701 | rets = 0; | |
eb9af0ac | 702 | dev->mei_host_buffer_is_empty = false; |
24aadc80 TW |
703 | if (length > mei_hbuf_max_data(dev)) { |
704 | mei_hdr.length = mei_hbuf_max_data(dev); | |
ab841160 OW |
705 | mei_hdr.msg_complete = 0; |
706 | } else { | |
707 | mei_hdr.length = length; | |
708 | mei_hdr.msg_complete = 1; | |
709 | } | |
710 | mei_hdr.host_addr = cl->host_client_id; | |
711 | mei_hdr.me_addr = cl->me_client_id; | |
712 | mei_hdr.reserved = 0; | |
713 | dev_dbg(&dev->pdev->dev, "call mei_write_message header=%08x.\n", | |
714 | *((u32 *) &mei_hdr)); | |
1ccb7b62 | 715 | if (mei_write_message(dev, &mei_hdr, |
ab841160 OW |
716 | (unsigned char *) (write_cb->request_buffer.data), |
717 | mei_hdr.length)) { | |
718 | rets = -ENODEV; | |
719 | goto unlock_dev; | |
720 | } | |
721 | cl->writing_state = MEI_WRITING; | |
722 | write_cb->information = mei_hdr.length; | |
723 | if (mei_hdr.msg_complete) { | |
724 | if (mei_flow_ctrl_reduce(dev, cl)) { | |
725 | rets = -ENODEV; | |
726 | goto unlock_dev; | |
727 | } | |
728 | list_add_tail(&write_cb->cb_list, | |
729 | &dev->write_waiting_list.mei_cb.cb_list); | |
730 | } else { | |
731 | list_add_tail(&write_cb->cb_list, | |
732 | &dev->write_list.mei_cb.cb_list); | |
733 | } | |
734 | ||
735 | } else { | |
736 | ||
737 | write_cb->information = 0; | |
738 | cl->writing_state = MEI_WRITING; | |
739 | list_add_tail(&write_cb->cb_list, | |
740 | &dev->write_list.mei_cb.cb_list); | |
741 | } | |
742 | mutex_unlock(&dev->device_lock); | |
743 | return length; | |
744 | ||
745 | unlock_dev: | |
746 | mutex_unlock(&dev->device_lock); | |
747 | mei_free_cb_private(write_cb); | |
748 | return rets; | |
749 | } | |
750 | ||
751 | ||
752 | /** | |
753 | * mei_ioctl - the IOCTL function | |
754 | * | |
755 | * @file: pointer to file structure | |
756 | * @cmd: ioctl command | |
757 | * @data: pointer to mei message structure | |
758 | * | |
759 | * returns 0 on success , <0 on error | |
760 | */ | |
761 | static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data) | |
762 | { | |
763 | struct mei_device *dev; | |
764 | struct mei_cl *cl = file->private_data; | |
765 | struct mei_connect_client_data *connect_data = NULL; | |
766 | int rets; | |
767 | ||
768 | if (cmd != IOCTL_MEI_CONNECT_CLIENT) | |
769 | return -EINVAL; | |
770 | ||
771 | if (WARN_ON(!cl || !cl->dev)) | |
772 | return -ENODEV; | |
773 | ||
774 | dev = cl->dev; | |
775 | ||
776 | dev_dbg(&dev->pdev->dev, "IOCTL cmd = 0x%x", cmd); | |
777 | ||
778 | mutex_lock(&dev->device_lock); | |
b210d750 | 779 | if (dev->dev_state != MEI_DEV_ENABLED) { |
ab841160 OW |
780 | rets = -ENODEV; |
781 | goto out; | |
782 | } | |
783 | ||
784 | dev_dbg(&dev->pdev->dev, ": IOCTL_MEI_CONNECT_CLIENT.\n"); | |
785 | ||
786 | connect_data = kzalloc(sizeof(struct mei_connect_client_data), | |
787 | GFP_KERNEL); | |
788 | if (!connect_data) { | |
789 | rets = -ENOMEM; | |
790 | goto out; | |
791 | } | |
792 | dev_dbg(&dev->pdev->dev, "copy connect data from user\n"); | |
793 | if (copy_from_user(connect_data, (char __user *)data, | |
794 | sizeof(struct mei_connect_client_data))) { | |
795 | dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n"); | |
796 | rets = -EFAULT; | |
797 | goto out; | |
798 | } | |
799 | rets = mei_ioctl_connect_client(file, connect_data); | |
800 | ||
801 | /* if all is ok, copying the data back to user. */ | |
802 | if (rets) | |
803 | goto out; | |
804 | ||
805 | dev_dbg(&dev->pdev->dev, "copy connect data to user\n"); | |
806 | if (copy_to_user((char __user *)data, connect_data, | |
807 | sizeof(struct mei_connect_client_data))) { | |
808 | dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n"); | |
809 | rets = -EFAULT; | |
810 | goto out; | |
811 | } | |
812 | ||
813 | out: | |
814 | kfree(connect_data); | |
815 | mutex_unlock(&dev->device_lock); | |
816 | return rets; | |
817 | } | |
818 | ||
819 | /** | |
820 | * mei_compat_ioctl - the compat IOCTL function | |
821 | * | |
822 | * @file: pointer to file structure | |
823 | * @cmd: ioctl command | |
824 | * @data: pointer to mei message structure | |
825 | * | |
826 | * returns 0 on success , <0 on error | |
827 | */ | |
828 | #ifdef CONFIG_COMPAT | |
829 | static long mei_compat_ioctl(struct file *file, | |
441ab50f | 830 | unsigned int cmd, unsigned long data) |
ab841160 OW |
831 | { |
832 | return mei_ioctl(file, cmd, (unsigned long)compat_ptr(data)); | |
833 | } | |
834 | #endif | |
835 | ||
836 | ||
837 | /** | |
838 | * mei_poll - the poll function | |
839 | * | |
840 | * @file: pointer to file structure | |
841 | * @wait: pointer to poll_table structure | |
842 | * | |
843 | * returns poll mask | |
844 | */ | |
845 | static unsigned int mei_poll(struct file *file, poll_table *wait) | |
846 | { | |
847 | struct mei_cl *cl = file->private_data; | |
848 | struct mei_device *dev; | |
849 | unsigned int mask = 0; | |
850 | ||
851 | if (WARN_ON(!cl || !cl->dev)) | |
852 | return mask; | |
853 | ||
854 | dev = cl->dev; | |
855 | ||
856 | mutex_lock(&dev->device_lock); | |
857 | ||
b210d750 | 858 | if (dev->dev_state != MEI_DEV_ENABLED) |
ab841160 OW |
859 | goto out; |
860 | ||
861 | ||
862 | if (cl == &dev->iamthif_cl) { | |
863 | mutex_unlock(&dev->device_lock); | |
864 | poll_wait(file, &dev->iamthif_cl.wait, wait); | |
865 | mutex_lock(&dev->device_lock); | |
866 | if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE && | |
867 | dev->iamthif_file_object == file) { | |
868 | mask |= (POLLIN | POLLRDNORM); | |
869 | dev_dbg(&dev->pdev->dev, "run next amthi cb\n"); | |
c95efb74 | 870 | mei_run_next_iamthif_cmd(dev); |
ab841160 OW |
871 | } |
872 | goto out; | |
873 | } | |
874 | ||
875 | mutex_unlock(&dev->device_lock); | |
876 | poll_wait(file, &cl->tx_wait, wait); | |
877 | mutex_lock(&dev->device_lock); | |
878 | if (MEI_WRITE_COMPLETE == cl->writing_state) | |
879 | mask |= (POLLIN | POLLRDNORM); | |
880 | ||
881 | out: | |
882 | mutex_unlock(&dev->device_lock); | |
883 | return mask; | |
884 | } | |
885 | ||
5b881e3c OW |
886 | /* |
887 | * file operations structure will be used for mei char device. | |
888 | */ | |
889 | static const struct file_operations mei_fops = { | |
890 | .owner = THIS_MODULE, | |
891 | .read = mei_read, | |
892 | .unlocked_ioctl = mei_ioctl, | |
893 | #ifdef CONFIG_COMPAT | |
894 | .compat_ioctl = mei_compat_ioctl, | |
895 | #endif | |
896 | .open = mei_open, | |
897 | .release = mei_release, | |
898 | .write = mei_write, | |
899 | .poll = mei_poll, | |
900 | .llseek = no_llseek | |
901 | }; | |
902 | ||
903 | ||
904 | /* | |
905 | * Misc Device Struct | |
906 | */ | |
907 | static struct miscdevice mei_misc_device = { | |
c38ea24e | 908 | .name = "mei", |
5b881e3c OW |
909 | .fops = &mei_fops, |
910 | .minor = MISC_DYNAMIC_MINOR, | |
911 | }; | |
912 | ||
9a123f19 TW |
913 | /** |
914 | * mei_quirk_probe - probe for devices that doesn't valid ME interface | |
915 | * @pdev: PCI device structure | |
916 | * @ent: entry into pci_device_table | |
917 | * | |
918 | * returns true if ME Interface is valid, false otherwise | |
919 | */ | |
920 | static bool __devinit mei_quirk_probe(struct pci_dev *pdev, | |
921 | const struct pci_device_id *ent) | |
922 | { | |
923 | u32 reg; | |
924 | if (ent->device == MEI_DEV_ID_PBG_1) { | |
925 | pci_read_config_dword(pdev, 0x48, ®); | |
926 | /* make sure that bit 9 is up and bit 10 is down */ | |
927 | if ((reg & 0x600) == 0x200) { | |
928 | dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); | |
929 | return false; | |
930 | } | |
931 | } | |
932 | return true; | |
933 | } | |
5b881e3c OW |
934 | /** |
935 | * mei_probe - Device Initialization Routine | |
936 | * | |
937 | * @pdev: PCI device structure | |
938 | * @ent: entry in kcs_pci_tbl | |
939 | * | |
940 | * returns 0 on success, <0 on failure. | |
941 | */ | |
942 | static int __devinit mei_probe(struct pci_dev *pdev, | |
943 | const struct pci_device_id *ent) | |
944 | { | |
945 | struct mei_device *dev; | |
946 | int err; | |
947 | ||
948 | mutex_lock(&mei_mutex); | |
9a123f19 TW |
949 | |
950 | if (!mei_quirk_probe(pdev, ent)) { | |
951 | err = -ENODEV; | |
952 | goto end; | |
953 | } | |
954 | ||
daed6b5e | 955 | if (mei_pdev) { |
5b881e3c OW |
956 | err = -EEXIST; |
957 | goto end; | |
958 | } | |
959 | /* enable pci dev */ | |
960 | err = pci_enable_device(pdev); | |
961 | if (err) { | |
32c826b6 | 962 | dev_err(&pdev->dev, "failed to enable pci device.\n"); |
5b881e3c OW |
963 | goto end; |
964 | } | |
965 | /* set PCI host mastering */ | |
966 | pci_set_master(pdev); | |
967 | /* pci request regions for mei driver */ | |
068c0ae9 | 968 | err = pci_request_regions(pdev, KBUILD_MODNAME); |
5b881e3c | 969 | if (err) { |
32c826b6 | 970 | dev_err(&pdev->dev, "failed to get pci regions.\n"); |
5b881e3c OW |
971 | goto disable_device; |
972 | } | |
973 | /* allocates and initializes the mei dev structure */ | |
974 | dev = mei_device_init(pdev); | |
975 | if (!dev) { | |
976 | err = -ENOMEM; | |
977 | goto release_regions; | |
978 | } | |
979 | /* mapping IO device memory */ | |
980 | dev->mem_addr = pci_iomap(pdev, 0, 0); | |
981 | if (!dev->mem_addr) { | |
32c826b6 | 982 | dev_err(&pdev->dev, "mapping I/O device memory failure.\n"); |
5b881e3c OW |
983 | err = -ENOMEM; |
984 | goto free_device; | |
985 | } | |
986 | pci_enable_msi(pdev); | |
987 | ||
988 | /* request and enable interrupt */ | |
989 | if (pci_dev_msi_enabled(pdev)) | |
990 | err = request_threaded_irq(pdev->irq, | |
991 | NULL, | |
992 | mei_interrupt_thread_handler, | |
068c0ae9 | 993 | IRQF_ONESHOT, KBUILD_MODNAME, dev); |
5b881e3c OW |
994 | else |
995 | err = request_threaded_irq(pdev->irq, | |
996 | mei_interrupt_quick_handler, | |
997 | mei_interrupt_thread_handler, | |
068c0ae9 | 998 | IRQF_SHARED, KBUILD_MODNAME, dev); |
5b881e3c OW |
999 | |
1000 | if (err) { | |
32c826b6 | 1001 | dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", |
5b881e3c | 1002 | pdev->irq); |
169dc388 | 1003 | goto disable_msi; |
5b881e3c OW |
1004 | } |
1005 | INIT_DELAYED_WORK(&dev->timer_work, mei_timer); | |
1006 | if (mei_hw_init(dev)) { | |
32c826b6 | 1007 | dev_err(&pdev->dev, "init hw failure.\n"); |
5b881e3c OW |
1008 | err = -ENODEV; |
1009 | goto release_irq; | |
1010 | } | |
1011 | ||
1012 | err = misc_register(&mei_misc_device); | |
1013 | if (err) | |
1014 | goto release_irq; | |
1015 | ||
daed6b5e | 1016 | mei_pdev = pdev; |
5b881e3c OW |
1017 | pci_set_drvdata(pdev, dev); |
1018 | ||
1019 | ||
1020 | schedule_delayed_work(&dev->timer_work, HZ); | |
1021 | ||
1022 | mutex_unlock(&mei_mutex); | |
1023 | ||
2f3d2b49 | 1024 | pr_debug("initialization successful.\n"); |
5b881e3c OW |
1025 | |
1026 | return 0; | |
1027 | ||
1028 | release_irq: | |
1029 | /* disable interrupts */ | |
1030 | dev->host_hw_state = mei_hcsr_read(dev); | |
1031 | mei_disable_interrupts(dev); | |
1032 | flush_scheduled_work(); | |
1033 | free_irq(pdev->irq, dev); | |
169dc388 | 1034 | disable_msi: |
5b881e3c | 1035 | pci_disable_msi(pdev); |
5b881e3c OW |
1036 | pci_iounmap(pdev, dev->mem_addr); |
1037 | free_device: | |
1038 | kfree(dev); | |
1039 | release_regions: | |
1040 | pci_release_regions(pdev); | |
1041 | disable_device: | |
1042 | pci_disable_device(pdev); | |
1043 | end: | |
1044 | mutex_unlock(&mei_mutex); | |
32c826b6 | 1045 | dev_err(&pdev->dev, "initialization failed.\n"); |
5b881e3c OW |
1046 | return err; |
1047 | } | |
1048 | ||
1049 | /** | |
1050 | * mei_remove - Device Removal Routine | |
1051 | * | |
1052 | * @pdev: PCI device structure | |
1053 | * | |
1054 | * mei_remove is called by the PCI subsystem to alert the driver | |
1055 | * that it should release a PCI device. | |
1056 | */ | |
1057 | static void __devexit mei_remove(struct pci_dev *pdev) | |
1058 | { | |
1059 | struct mei_device *dev; | |
1060 | ||
daed6b5e | 1061 | if (mei_pdev != pdev) |
5b881e3c OW |
1062 | return; |
1063 | ||
1064 | dev = pci_get_drvdata(pdev); | |
1065 | if (!dev) | |
1066 | return; | |
1067 | ||
1068 | mutex_lock(&dev->device_lock); | |
1069 | ||
c216fdeb TW |
1070 | cancel_delayed_work(&dev->timer_work); |
1071 | ||
1072 | mei_wd_stop(dev); | |
5b881e3c | 1073 | |
daed6b5e | 1074 | mei_pdev = NULL; |
5b881e3c OW |
1075 | |
1076 | if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) { | |
1077 | dev->iamthif_cl.state = MEI_FILE_DISCONNECTING; | |
1078 | mei_disconnect_host_client(dev, &dev->iamthif_cl); | |
1079 | } | |
1080 | if (dev->wd_cl.state == MEI_FILE_CONNECTED) { | |
1081 | dev->wd_cl.state = MEI_FILE_DISCONNECTING; | |
1082 | mei_disconnect_host_client(dev, &dev->wd_cl); | |
1083 | } | |
1084 | ||
1085 | /* Unregistering watchdog device */ | |
70cd5337 | 1086 | mei_watchdog_unregister(dev); |
5b881e3c OW |
1087 | |
1088 | /* remove entry if already in list */ | |
1089 | dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n"); | |
1090 | mei_remove_client_from_file_list(dev, dev->wd_cl.host_client_id); | |
1091 | mei_remove_client_from_file_list(dev, dev->iamthif_cl.host_client_id); | |
1092 | ||
1093 | dev->iamthif_current_cb = NULL; | |
1094 | dev->me_clients_num = 0; | |
1095 | ||
1096 | mutex_unlock(&dev->device_lock); | |
1097 | ||
1098 | flush_scheduled_work(); | |
1099 | ||
1100 | /* disable interrupts */ | |
1101 | mei_disable_interrupts(dev); | |
1102 | ||
1103 | free_irq(pdev->irq, dev); | |
1104 | pci_disable_msi(pdev); | |
1105 | pci_set_drvdata(pdev, NULL); | |
1106 | ||
1107 | if (dev->mem_addr) | |
1108 | pci_iounmap(pdev, dev->mem_addr); | |
1109 | ||
1110 | kfree(dev); | |
1111 | ||
1112 | pci_release_regions(pdev); | |
1113 | pci_disable_device(pdev); | |
a44cab4a TW |
1114 | |
1115 | misc_deregister(&mei_misc_device); | |
5b881e3c | 1116 | } |
ab841160 OW |
1117 | #ifdef CONFIG_PM |
1118 | static int mei_pci_suspend(struct device *device) | |
1119 | { | |
1120 | struct pci_dev *pdev = to_pci_dev(device); | |
1121 | struct mei_device *dev = pci_get_drvdata(pdev); | |
1122 | int err; | |
1123 | ||
1124 | if (!dev) | |
1125 | return -ENODEV; | |
1126 | mutex_lock(&dev->device_lock); | |
c216fdeb TW |
1127 | |
1128 | cancel_delayed_work(&dev->timer_work); | |
1129 | ||
ab841160 | 1130 | /* Stop watchdog if exists */ |
c216fdeb | 1131 | err = mei_wd_stop(dev); |
ab841160 | 1132 | /* Set new mei state */ |
b210d750 TW |
1133 | if (dev->dev_state == MEI_DEV_ENABLED || |
1134 | dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) { | |
1135 | dev->dev_state = MEI_DEV_POWER_DOWN; | |
ab841160 OW |
1136 | mei_reset(dev, 0); |
1137 | } | |
1138 | mutex_unlock(&dev->device_lock); | |
1139 | ||
1140 | free_irq(pdev->irq, dev); | |
4f61a7ad | 1141 | pci_disable_msi(pdev); |
ab841160 OW |
1142 | |
1143 | return err; | |
1144 | } | |
1145 | ||
1146 | static int mei_pci_resume(struct device *device) | |
1147 | { | |
1148 | struct pci_dev *pdev = to_pci_dev(device); | |
1149 | struct mei_device *dev; | |
1150 | int err; | |
1151 | ||
1152 | dev = pci_get_drvdata(pdev); | |
1153 | if (!dev) | |
1154 | return -ENODEV; | |
1155 | ||
4f61a7ad TW |
1156 | pci_enable_msi(pdev); |
1157 | ||
1158 | /* request and enable interrupt */ | |
1159 | if (pci_dev_msi_enabled(pdev)) | |
1160 | err = request_threaded_irq(pdev->irq, | |
1161 | NULL, | |
1162 | mei_interrupt_thread_handler, | |
068c0ae9 | 1163 | IRQF_ONESHOT, KBUILD_MODNAME, dev); |
4f61a7ad TW |
1164 | else |
1165 | err = request_threaded_irq(pdev->irq, | |
ab841160 OW |
1166 | mei_interrupt_quick_handler, |
1167 | mei_interrupt_thread_handler, | |
068c0ae9 | 1168 | IRQF_SHARED, KBUILD_MODNAME, dev); |
4f61a7ad | 1169 | |
ab841160 | 1170 | if (err) { |
32c826b6 TW |
1171 | dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", |
1172 | pdev->irq); | |
ab841160 OW |
1173 | return err; |
1174 | } | |
1175 | ||
1176 | mutex_lock(&dev->device_lock); | |
b210d750 | 1177 | dev->dev_state = MEI_DEV_POWER_UP; |
ab841160 OW |
1178 | mei_reset(dev, 1); |
1179 | mutex_unlock(&dev->device_lock); | |
1180 | ||
6d70e935 OW |
1181 | /* Start timer if stopped in suspend */ |
1182 | schedule_delayed_work(&dev->timer_work, HZ); | |
1183 | ||
ab841160 OW |
1184 | return err; |
1185 | } | |
1186 | static SIMPLE_DEV_PM_OPS(mei_pm_ops, mei_pci_suspend, mei_pci_resume); | |
1187 | #define MEI_PM_OPS (&mei_pm_ops) | |
1188 | #else | |
2d990362 | 1189 | #define MEI_PM_OPS NULL |
ab841160 OW |
1190 | #endif /* CONFIG_PM */ |
1191 | /* | |
1192 | * PCI driver structure | |
1193 | */ | |
1194 | static struct pci_driver mei_driver = { | |
068c0ae9 | 1195 | .name = KBUILD_MODNAME, |
ab841160 OW |
1196 | .id_table = mei_pci_tbl, |
1197 | .probe = mei_probe, | |
1198 | .remove = __devexit_p(mei_remove), | |
1199 | .shutdown = __devexit_p(mei_remove), | |
1200 | .driver.pm = MEI_PM_OPS, | |
1201 | }; | |
1202 | ||
6078188e | 1203 | module_pci_driver(mei_driver); |
ab841160 OW |
1204 | |
1205 | MODULE_AUTHOR("Intel Corporation"); | |
1206 | MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); | |
1207 | MODULE_LICENSE("GPL v2"); |