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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 | 91 | |
ab841160 OW |
92 | /** |
93 | * find_read_list_entry - find read list entry | |
94 | * | |
95 | * @dev: device structure | |
96 | * @file: pointer to file structure | |
97 | * | |
98 | * returns cb on success, NULL on error | |
99 | */ | |
100 | static struct mei_cl_cb *find_read_list_entry( | |
101 | struct mei_device *dev, | |
102 | struct mei_cl *cl) | |
103 | { | |
b7cd2d9f TW |
104 | struct mei_cl_cb *pos = NULL; |
105 | struct mei_cl_cb *next = NULL; | |
ab841160 | 106 | |
b7cd2d9f | 107 | dev_dbg(&dev->pdev->dev, "remove read_list CB\n"); |
db3ed431 TW |
108 | list_for_each_entry_safe(pos, next, &dev->read_list.list, list) |
109 | if (mei_cl_cmp_id(cl, pos->cl)) | |
b7cd2d9f | 110 | return pos; |
ab841160 OW |
111 | return NULL; |
112 | } | |
113 | ||
114 | /** | |
115 | * mei_open - the open function | |
116 | * | |
117 | * @inode: pointer to inode structure | |
118 | * @file: pointer to file structure | |
119 | * | |
120 | * returns 0 on success, <0 on error | |
121 | */ | |
122 | static int mei_open(struct inode *inode, struct file *file) | |
123 | { | |
124 | struct mei_cl *cl; | |
ab841160 | 125 | struct mei_device *dev; |
6f37aca8 TW |
126 | unsigned long cl_id; |
127 | int err; | |
ab841160 OW |
128 | |
129 | err = -ENODEV; | |
daed6b5e | 130 | if (!mei_pdev) |
ab841160 OW |
131 | goto out; |
132 | ||
daed6b5e | 133 | dev = pci_get_drvdata(mei_pdev); |
5b881e3c | 134 | if (!dev) |
ab841160 OW |
135 | goto out; |
136 | ||
137 | mutex_lock(&dev->device_lock); | |
138 | err = -ENOMEM; | |
c95efb74 | 139 | cl = mei_cl_allocate(dev); |
ab841160 | 140 | if (!cl) |
303dfbf5 | 141 | goto out_unlock; |
ab841160 OW |
142 | |
143 | err = -ENODEV; | |
b210d750 TW |
144 | if (dev->dev_state != MEI_DEV_ENABLED) { |
145 | dev_dbg(&dev->pdev->dev, "dev_state != MEI_ENABLED dev_state = %s\n", | |
146 | mei_dev_state_str(dev->dev_state)); | |
ab841160 OW |
147 | goto out_unlock; |
148 | } | |
149 | err = -EMFILE; | |
1b812947 TW |
150 | if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) { |
151 | dev_err(&dev->pdev->dev, "open_handle_count exceded %d", | |
152 | MEI_MAX_OPEN_HANDLE_COUNT); | |
ab841160 | 153 | goto out_unlock; |
1b812947 | 154 | } |
ab841160 | 155 | |
6f37aca8 | 156 | cl_id = find_first_zero_bit(dev->host_clients_map, MEI_CLIENTS_MAX); |
1b812947 TW |
157 | if (cl_id >= MEI_CLIENTS_MAX) { |
158 | dev_err(&dev->pdev->dev, "client_id exceded %d", | |
159 | MEI_CLIENTS_MAX) ; | |
ab841160 | 160 | goto out_unlock; |
1b812947 | 161 | } |
ab841160 | 162 | |
6f37aca8 TW |
163 | cl->host_client_id = cl_id; |
164 | ||
ab841160 OW |
165 | dev_dbg(&dev->pdev->dev, "client_id = %d\n", cl->host_client_id); |
166 | ||
167 | dev->open_handle_count++; | |
6f37aca8 | 168 | |
ab841160 OW |
169 | list_add_tail(&cl->link, &dev->file_list); |
170 | ||
171 | set_bit(cl->host_client_id, dev->host_clients_map); | |
172 | cl->state = MEI_FILE_INITIALIZING; | |
173 | cl->sm_state = 0; | |
174 | ||
175 | file->private_data = cl; | |
176 | mutex_unlock(&dev->device_lock); | |
177 | ||
5b881e3c | 178 | return nonseekable_open(inode, file); |
ab841160 OW |
179 | |
180 | out_unlock: | |
181 | mutex_unlock(&dev->device_lock); | |
182 | kfree(cl); | |
183 | out: | |
184 | return err; | |
185 | } | |
186 | ||
187 | /** | |
188 | * mei_release - the release function | |
189 | * | |
190 | * @inode: pointer to inode structure | |
191 | * @file: pointer to file structure | |
192 | * | |
193 | * returns 0 on success, <0 on error | |
194 | */ | |
195 | static int mei_release(struct inode *inode, struct file *file) | |
196 | { | |
197 | struct mei_cl *cl = file->private_data; | |
198 | struct mei_cl_cb *cb; | |
199 | struct mei_device *dev; | |
200 | int rets = 0; | |
201 | ||
202 | if (WARN_ON(!cl || !cl->dev)) | |
203 | return -ENODEV; | |
204 | ||
205 | dev = cl->dev; | |
206 | ||
207 | mutex_lock(&dev->device_lock); | |
a562d5c2 TW |
208 | if (cl == &dev->iamthif_cl) { |
209 | rets = mei_amthif_release(dev, file); | |
210 | goto out; | |
211 | } | |
212 | if (cl->state == MEI_FILE_CONNECTED) { | |
213 | cl->state = MEI_FILE_DISCONNECTING; | |
214 | dev_dbg(&dev->pdev->dev, | |
215 | "disconnecting client host client = %d, " | |
216 | "ME client = %d\n", | |
ab841160 OW |
217 | cl->host_client_id, |
218 | cl->me_client_id); | |
a562d5c2 TW |
219 | rets = mei_disconnect_host_client(dev, cl); |
220 | } | |
221 | mei_cl_flush_queues(cl); | |
222 | dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n", | |
223 | cl->host_client_id, | |
224 | cl->me_client_id); | |
225 | ||
226 | if (dev->open_handle_count > 0) { | |
227 | clear_bit(cl->host_client_id, dev->host_clients_map); | |
228 | dev->open_handle_count--; | |
229 | } | |
ff8b2f4e | 230 | mei_me_cl_unlink(dev, cl); |
a562d5c2 TW |
231 | |
232 | /* free read cb */ | |
233 | cb = NULL; | |
234 | if (cl->read_cb) { | |
235 | cb = find_read_list_entry(dev, cl); | |
236 | /* Remove entry from read list */ | |
237 | if (cb) | |
238 | list_del(&cb->list); | |
239 | ||
240 | cb = cl->read_cb; | |
241 | cl->read_cb = NULL; | |
242 | } | |
ab841160 | 243 | |
a562d5c2 | 244 | file->private_data = NULL; |
ab841160 | 245 | |
a562d5c2 TW |
246 | if (cb) { |
247 | mei_io_cb_free(cb); | |
ab841160 | 248 | cb = NULL; |
ab841160 | 249 | } |
a562d5c2 TW |
250 | |
251 | kfree(cl); | |
252 | out: | |
ab841160 OW |
253 | mutex_unlock(&dev->device_lock); |
254 | return rets; | |
255 | } | |
256 | ||
257 | ||
258 | /** | |
259 | * mei_read - the read function. | |
260 | * | |
261 | * @file: pointer to file structure | |
262 | * @ubuf: pointer to user buffer | |
263 | * @length: buffer length | |
264 | * @offset: data offset in buffer | |
265 | * | |
266 | * returns >=0 data length on success , <0 on error | |
267 | */ | |
268 | static ssize_t mei_read(struct file *file, char __user *ubuf, | |
441ab50f | 269 | size_t length, loff_t *offset) |
ab841160 OW |
270 | { |
271 | struct mei_cl *cl = file->private_data; | |
272 | struct mei_cl_cb *cb_pos = NULL; | |
273 | struct mei_cl_cb *cb = NULL; | |
274 | struct mei_device *dev; | |
275 | int i; | |
276 | int rets; | |
277 | int err; | |
278 | ||
279 | ||
280 | if (WARN_ON(!cl || !cl->dev)) | |
281 | return -ENODEV; | |
282 | ||
283 | dev = cl->dev; | |
284 | ||
285 | mutex_lock(&dev->device_lock); | |
b210d750 | 286 | if (dev->dev_state != MEI_DEV_ENABLED) { |
ab841160 OW |
287 | rets = -ENODEV; |
288 | goto out; | |
289 | } | |
290 | ||
291 | if ((cl->sm_state & MEI_WD_STATE_INDEPENDENCE_MSG_SENT) == 0) { | |
292 | /* Do not allow to read watchdog client */ | |
07b509b7 | 293 | i = mei_me_cl_by_uuid(dev, &mei_wd_guid); |
ab841160 OW |
294 | if (i >= 0) { |
295 | struct mei_me_client *me_client = &dev->me_clients[i]; | |
ab841160 OW |
296 | if (cl->me_client_id == me_client->client_id) { |
297 | rets = -EBADF; | |
298 | goto out; | |
299 | } | |
300 | } | |
301 | } else { | |
302 | cl->sm_state &= ~MEI_WD_STATE_INDEPENDENCE_MSG_SENT; | |
303 | } | |
304 | ||
305 | if (cl == &dev->iamthif_cl) { | |
19838fb8 | 306 | rets = mei_amthif_read(dev, file, ubuf, length, offset); |
ab841160 OW |
307 | goto out; |
308 | } | |
309 | ||
ebb108ef | 310 | if (cl->read_cb && cl->read_cb->buf_idx > *offset) { |
ab841160 OW |
311 | cb = cl->read_cb; |
312 | goto copy_buffer; | |
ebb108ef TW |
313 | } else if (cl->read_cb && cl->read_cb->buf_idx > 0 && |
314 | cl->read_cb->buf_idx <= *offset) { | |
ab841160 OW |
315 | cb = cl->read_cb; |
316 | rets = 0; | |
317 | goto free; | |
ebb108ef | 318 | } else if ((!cl->read_cb || !cl->read_cb->buf_idx) && *offset > 0) { |
5f9092f3 | 319 | /*Offset needs to be cleaned for contiguous reads*/ |
ab841160 OW |
320 | *offset = 0; |
321 | rets = 0; | |
322 | goto out; | |
323 | } | |
324 | ||
325 | err = mei_start_read(dev, cl); | |
326 | if (err && err != -EBUSY) { | |
327 | dev_dbg(&dev->pdev->dev, | |
328 | "mei start read failure with status = %d\n", err); | |
329 | rets = err; | |
330 | goto out; | |
331 | } | |
332 | ||
333 | if (MEI_READ_COMPLETE != cl->reading_state && | |
334 | !waitqueue_active(&cl->rx_wait)) { | |
335 | if (file->f_flags & O_NONBLOCK) { | |
336 | rets = -EAGAIN; | |
337 | goto out; | |
338 | } | |
339 | ||
340 | mutex_unlock(&dev->device_lock); | |
341 | ||
342 | if (wait_event_interruptible(cl->rx_wait, | |
343 | (MEI_READ_COMPLETE == cl->reading_state || | |
344 | MEI_FILE_INITIALIZING == cl->state || | |
345 | MEI_FILE_DISCONNECTED == cl->state || | |
346 | MEI_FILE_DISCONNECTING == cl->state))) { | |
347 | if (signal_pending(current)) | |
348 | return -EINTR; | |
349 | return -ERESTARTSYS; | |
350 | } | |
351 | ||
352 | mutex_lock(&dev->device_lock); | |
353 | if (MEI_FILE_INITIALIZING == cl->state || | |
354 | MEI_FILE_DISCONNECTED == cl->state || | |
355 | MEI_FILE_DISCONNECTING == cl->state) { | |
356 | rets = -EBUSY; | |
357 | goto out; | |
358 | } | |
359 | } | |
360 | ||
361 | cb = cl->read_cb; | |
362 | ||
363 | if (!cb) { | |
364 | rets = -ENODEV; | |
365 | goto out; | |
366 | } | |
367 | if (cl->reading_state != MEI_READ_COMPLETE) { | |
368 | rets = 0; | |
369 | goto out; | |
370 | } | |
371 | /* now copy the data to user space */ | |
372 | copy_buffer: | |
373 | dev_dbg(&dev->pdev->dev, "cb->response_buffer size - %d\n", | |
374 | cb->response_buffer.size); | |
ebb108ef TW |
375 | dev_dbg(&dev->pdev->dev, "cb->buf_idx - %lu\n", cb->buf_idx); |
376 | if (length == 0 || ubuf == NULL || *offset > cb->buf_idx) { | |
ab841160 OW |
377 | rets = -EMSGSIZE; |
378 | goto free; | |
379 | } | |
380 | ||
ebb108ef TW |
381 | /* length is being truncated to PAGE_SIZE, |
382 | * however buf_idx may point beyond that */ | |
383 | length = min_t(size_t, length, cb->buf_idx - *offset); | |
ab841160 | 384 | |
441ab50f | 385 | if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) { |
ab841160 OW |
386 | rets = -EFAULT; |
387 | goto free; | |
388 | } | |
389 | ||
390 | rets = length; | |
391 | *offset += length; | |
ebb108ef | 392 | if ((unsigned long)*offset < cb->buf_idx) |
ab841160 OW |
393 | goto out; |
394 | ||
395 | free: | |
396 | cb_pos = find_read_list_entry(dev, cl); | |
397 | /* Remove entry from read list */ | |
398 | if (cb_pos) | |
fb601adb | 399 | list_del(&cb_pos->list); |
601a1efa | 400 | mei_io_cb_free(cb); |
ab841160 OW |
401 | cl->reading_state = MEI_IDLE; |
402 | cl->read_cb = NULL; | |
403 | cl->read_pending = 0; | |
404 | out: | |
405 | dev_dbg(&dev->pdev->dev, "end mei read rets= %d\n", rets); | |
406 | mutex_unlock(&dev->device_lock); | |
407 | return rets; | |
408 | } | |
ab841160 OW |
409 | /** |
410 | * mei_write - the write function. | |
411 | * | |
412 | * @file: pointer to file structure | |
413 | * @ubuf: pointer to user buffer | |
414 | * @length: buffer length | |
415 | * @offset: data offset in buffer | |
416 | * | |
417 | * returns >=0 data length on success , <0 on error | |
418 | */ | |
419 | static ssize_t mei_write(struct file *file, const char __user *ubuf, | |
441ab50f | 420 | size_t length, loff_t *offset) |
ab841160 OW |
421 | { |
422 | struct mei_cl *cl = file->private_data; | |
423 | struct mei_cl_cb *write_cb = NULL; | |
424 | struct mei_msg_hdr mei_hdr; | |
425 | struct mei_device *dev; | |
426 | unsigned long timeout = 0; | |
427 | int rets; | |
428 | int i; | |
429 | ||
430 | if (WARN_ON(!cl || !cl->dev)) | |
431 | return -ENODEV; | |
432 | ||
433 | dev = cl->dev; | |
434 | ||
435 | mutex_lock(&dev->device_lock); | |
436 | ||
b210d750 | 437 | if (dev->dev_state != MEI_DEV_ENABLED) { |
75f0ee15 | 438 | rets = -ENODEV; |
b0d0cf77 | 439 | goto err; |
ab841160 OW |
440 | } |
441 | ||
75f0ee15 TW |
442 | i = mei_me_cl_by_id(dev, cl->me_client_id); |
443 | if (i < 0) { | |
444 | rets = -ENODEV; | |
b0d0cf77 | 445 | goto err; |
75f0ee15 TW |
446 | } |
447 | if (length > dev->me_clients[i].props.max_msg_length || length <= 0) { | |
448 | rets = -EMSGSIZE; | |
b0d0cf77 | 449 | goto err; |
75f0ee15 TW |
450 | } |
451 | ||
452 | if (cl->state != MEI_FILE_CONNECTED) { | |
453 | rets = -ENODEV; | |
454 | dev_err(&dev->pdev->dev, "host client = %d, is not connected to ME client = %d", | |
455 | cl->host_client_id, cl->me_client_id); | |
b0d0cf77 | 456 | goto err; |
75f0ee15 | 457 | } |
ab841160 | 458 | if (cl == &dev->iamthif_cl) { |
19838fb8 | 459 | write_cb = mei_amthif_find_read_list_entry(dev, file); |
ab841160 OW |
460 | |
461 | if (write_cb) { | |
462 | timeout = write_cb->read_time + | |
3870c320 | 463 | mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER); |
ab841160 OW |
464 | |
465 | if (time_after(jiffies, timeout) || | |
75f0ee15 TW |
466 | cl->reading_state == MEI_READ_COMPLETE) { |
467 | *offset = 0; | |
fb601adb | 468 | list_del(&write_cb->list); |
601a1efa | 469 | mei_io_cb_free(write_cb); |
75f0ee15 | 470 | write_cb = NULL; |
ab841160 OW |
471 | } |
472 | } | |
473 | } | |
474 | ||
475 | /* free entry used in read */ | |
476 | if (cl->reading_state == MEI_READ_COMPLETE) { | |
477 | *offset = 0; | |
478 | write_cb = find_read_list_entry(dev, cl); | |
479 | if (write_cb) { | |
fb601adb | 480 | list_del(&write_cb->list); |
601a1efa | 481 | mei_io_cb_free(write_cb); |
ab841160 OW |
482 | write_cb = NULL; |
483 | cl->reading_state = MEI_IDLE; | |
484 | cl->read_cb = NULL; | |
485 | cl->read_pending = 0; | |
486 | } | |
441ab50f | 487 | } else if (cl->reading_state == MEI_IDLE && !cl->read_pending) |
ab841160 OW |
488 | *offset = 0; |
489 | ||
490 | ||
33d28c92 | 491 | write_cb = mei_io_cb_init(cl, file); |
ab841160 | 492 | if (!write_cb) { |
33d28c92 TW |
493 | dev_err(&dev->pdev->dev, "write cb allocation failed\n"); |
494 | rets = -ENOMEM; | |
b0d0cf77 | 495 | goto err; |
ab841160 | 496 | } |
33d28c92 TW |
497 | rets = mei_io_cb_alloc_req_buf(write_cb, length); |
498 | if (rets) | |
b0d0cf77 | 499 | goto err; |
ab841160 | 500 | |
33d28c92 | 501 | dev_dbg(&dev->pdev->dev, "cb request size = %zd\n", length); |
ab841160 | 502 | |
75f0ee15 TW |
503 | rets = copy_from_user(write_cb->request_buffer.data, ubuf, length); |
504 | if (rets) | |
b0d0cf77 | 505 | goto err; |
ab841160 OW |
506 | |
507 | cl->sm_state = 0; | |
508 | if (length == 4 && | |
509 | ((memcmp(mei_wd_state_independence_msg[0], | |
510 | write_cb->request_buffer.data, 4) == 0) || | |
511 | (memcmp(mei_wd_state_independence_msg[1], | |
512 | write_cb->request_buffer.data, 4) == 0) || | |
513 | (memcmp(mei_wd_state_independence_msg[2], | |
514 | write_cb->request_buffer.data, 4) == 0))) | |
515 | cl->sm_state |= MEI_WD_STATE_INDEPENDENCE_MSG_SENT; | |
516 | ||
ab841160 | 517 | if (cl == &dev->iamthif_cl) { |
ab5c4a56 | 518 | rets = mei_amthif_write(dev, write_cb); |
ab841160 | 519 | |
ab5c4a56 TW |
520 | if (rets) { |
521 | dev_err(&dev->pdev->dev, | |
522 | "amthi write failed with status = %d\n", rets); | |
523 | goto err; | |
ab841160 OW |
524 | } |
525 | mutex_unlock(&dev->device_lock); | |
75f0ee15 | 526 | return length; |
ab841160 OW |
527 | } |
528 | ||
4b8960b4 | 529 | write_cb->fop_type = MEI_FOP_WRITE; |
ab841160 OW |
530 | |
531 | dev_dbg(&dev->pdev->dev, "host client = %d, ME client = %d\n", | |
532 | cl->host_client_id, cl->me_client_id); | |
ab841160 OW |
533 | rets = mei_flow_ctrl_creds(dev, cl); |
534 | if (rets < 0) | |
b0d0cf77 | 535 | goto err; |
ab841160 | 536 | |
b0d0cf77 TW |
537 | if (rets == 0 || dev->mei_host_buffer_is_empty == false) { |
538 | write_cb->buf_idx = 0; | |
539 | mei_hdr.msg_complete = 0; | |
ab841160 | 540 | cl->writing_state = MEI_WRITING; |
b0d0cf77 TW |
541 | goto out; |
542 | } | |
ab841160 | 543 | |
b0d0cf77 TW |
544 | dev->mei_host_buffer_is_empty = false; |
545 | if (length > mei_hbuf_max_data(dev)) { | |
546 | mei_hdr.length = mei_hbuf_max_data(dev); | |
547 | mei_hdr.msg_complete = 0; | |
ab841160 | 548 | } else { |
b0d0cf77 TW |
549 | mei_hdr.length = length; |
550 | mei_hdr.msg_complete = 1; | |
551 | } | |
552 | mei_hdr.host_addr = cl->host_client_id; | |
553 | mei_hdr.me_addr = cl->me_client_id; | |
554 | mei_hdr.reserved = 0; | |
15d4acc5 TW |
555 | |
556 | dev_dbg(&dev->pdev->dev, "write " MEI_HDR_FMT "\n", | |
557 | MEI_HDR_PRM(&mei_hdr)); | |
438763f3 | 558 | if (mei_write_message(dev, &mei_hdr, write_cb->request_buffer.data)) { |
b0d0cf77 TW |
559 | rets = -ENODEV; |
560 | goto err; | |
561 | } | |
562 | cl->writing_state = MEI_WRITING; | |
563 | write_cb->buf_idx = mei_hdr.length; | |
ab841160 | 564 | |
b0d0cf77 TW |
565 | out: |
566 | if (mei_hdr.msg_complete) { | |
567 | if (mei_flow_ctrl_reduce(dev, cl)) { | |
568 | rets = -ENODEV; | |
569 | goto err; | |
570 | } | |
571 | list_add_tail(&write_cb->list, &dev->write_waiting_list.list); | |
572 | } else { | |
fb601adb | 573 | list_add_tail(&write_cb->list, &dev->write_list.list); |
ab841160 | 574 | } |
b0d0cf77 | 575 | |
ab841160 OW |
576 | mutex_unlock(&dev->device_lock); |
577 | return length; | |
578 | ||
b0d0cf77 | 579 | err: |
ab841160 | 580 | mutex_unlock(&dev->device_lock); |
601a1efa | 581 | mei_io_cb_free(write_cb); |
ab841160 OW |
582 | return rets; |
583 | } | |
584 | ||
585 | ||
586 | /** | |
587 | * mei_ioctl - the IOCTL function | |
588 | * | |
589 | * @file: pointer to file structure | |
590 | * @cmd: ioctl command | |
591 | * @data: pointer to mei message structure | |
592 | * | |
593 | * returns 0 on success , <0 on error | |
594 | */ | |
595 | static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data) | |
596 | { | |
597 | struct mei_device *dev; | |
598 | struct mei_cl *cl = file->private_data; | |
599 | struct mei_connect_client_data *connect_data = NULL; | |
600 | int rets; | |
601 | ||
602 | if (cmd != IOCTL_MEI_CONNECT_CLIENT) | |
603 | return -EINVAL; | |
604 | ||
605 | if (WARN_ON(!cl || !cl->dev)) | |
606 | return -ENODEV; | |
607 | ||
608 | dev = cl->dev; | |
609 | ||
610 | dev_dbg(&dev->pdev->dev, "IOCTL cmd = 0x%x", cmd); | |
611 | ||
612 | mutex_lock(&dev->device_lock); | |
b210d750 | 613 | if (dev->dev_state != MEI_DEV_ENABLED) { |
ab841160 OW |
614 | rets = -ENODEV; |
615 | goto out; | |
616 | } | |
617 | ||
618 | dev_dbg(&dev->pdev->dev, ": IOCTL_MEI_CONNECT_CLIENT.\n"); | |
619 | ||
620 | connect_data = kzalloc(sizeof(struct mei_connect_client_data), | |
621 | GFP_KERNEL); | |
622 | if (!connect_data) { | |
623 | rets = -ENOMEM; | |
624 | goto out; | |
625 | } | |
626 | dev_dbg(&dev->pdev->dev, "copy connect data from user\n"); | |
627 | if (copy_from_user(connect_data, (char __user *)data, | |
628 | sizeof(struct mei_connect_client_data))) { | |
629 | dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n"); | |
630 | rets = -EFAULT; | |
631 | goto out; | |
632 | } | |
633 | rets = mei_ioctl_connect_client(file, connect_data); | |
634 | ||
635 | /* if all is ok, copying the data back to user. */ | |
636 | if (rets) | |
637 | goto out; | |
638 | ||
639 | dev_dbg(&dev->pdev->dev, "copy connect data to user\n"); | |
640 | if (copy_to_user((char __user *)data, connect_data, | |
641 | sizeof(struct mei_connect_client_data))) { | |
642 | dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n"); | |
643 | rets = -EFAULT; | |
644 | goto out; | |
645 | } | |
646 | ||
647 | out: | |
648 | kfree(connect_data); | |
649 | mutex_unlock(&dev->device_lock); | |
650 | return rets; | |
651 | } | |
652 | ||
653 | /** | |
654 | * mei_compat_ioctl - the compat IOCTL function | |
655 | * | |
656 | * @file: pointer to file structure | |
657 | * @cmd: ioctl command | |
658 | * @data: pointer to mei message structure | |
659 | * | |
660 | * returns 0 on success , <0 on error | |
661 | */ | |
662 | #ifdef CONFIG_COMPAT | |
663 | static long mei_compat_ioctl(struct file *file, | |
441ab50f | 664 | unsigned int cmd, unsigned long data) |
ab841160 OW |
665 | { |
666 | return mei_ioctl(file, cmd, (unsigned long)compat_ptr(data)); | |
667 | } | |
668 | #endif | |
669 | ||
670 | ||
671 | /** | |
672 | * mei_poll - the poll function | |
673 | * | |
674 | * @file: pointer to file structure | |
675 | * @wait: pointer to poll_table structure | |
676 | * | |
677 | * returns poll mask | |
678 | */ | |
679 | static unsigned int mei_poll(struct file *file, poll_table *wait) | |
680 | { | |
681 | struct mei_cl *cl = file->private_data; | |
682 | struct mei_device *dev; | |
683 | unsigned int mask = 0; | |
684 | ||
685 | if (WARN_ON(!cl || !cl->dev)) | |
686 | return mask; | |
687 | ||
688 | dev = cl->dev; | |
689 | ||
690 | mutex_lock(&dev->device_lock); | |
691 | ||
b210d750 | 692 | if (dev->dev_state != MEI_DEV_ENABLED) |
ab841160 OW |
693 | goto out; |
694 | ||
695 | ||
696 | if (cl == &dev->iamthif_cl) { | |
744f0f2f | 697 | mask = mei_amthif_poll(dev, file, wait); |
ab841160 OW |
698 | goto out; |
699 | } | |
700 | ||
701 | mutex_unlock(&dev->device_lock); | |
702 | poll_wait(file, &cl->tx_wait, wait); | |
703 | mutex_lock(&dev->device_lock); | |
704 | if (MEI_WRITE_COMPLETE == cl->writing_state) | |
705 | mask |= (POLLIN | POLLRDNORM); | |
706 | ||
707 | out: | |
708 | mutex_unlock(&dev->device_lock); | |
709 | return mask; | |
710 | } | |
711 | ||
5b881e3c OW |
712 | /* |
713 | * file operations structure will be used for mei char device. | |
714 | */ | |
715 | static const struct file_operations mei_fops = { | |
716 | .owner = THIS_MODULE, | |
717 | .read = mei_read, | |
718 | .unlocked_ioctl = mei_ioctl, | |
719 | #ifdef CONFIG_COMPAT | |
720 | .compat_ioctl = mei_compat_ioctl, | |
721 | #endif | |
722 | .open = mei_open, | |
723 | .release = mei_release, | |
724 | .write = mei_write, | |
725 | .poll = mei_poll, | |
726 | .llseek = no_llseek | |
727 | }; | |
728 | ||
729 | ||
730 | /* | |
731 | * Misc Device Struct | |
732 | */ | |
733 | static struct miscdevice mei_misc_device = { | |
c38ea24e | 734 | .name = "mei", |
5b881e3c OW |
735 | .fops = &mei_fops, |
736 | .minor = MISC_DYNAMIC_MINOR, | |
737 | }; | |
738 | ||
9a123f19 TW |
739 | /** |
740 | * mei_quirk_probe - probe for devices that doesn't valid ME interface | |
741 | * @pdev: PCI device structure | |
742 | * @ent: entry into pci_device_table | |
743 | * | |
744 | * returns true if ME Interface is valid, false otherwise | |
745 | */ | |
80c8ae28 | 746 | static bool mei_quirk_probe(struct pci_dev *pdev, |
9a123f19 TW |
747 | const struct pci_device_id *ent) |
748 | { | |
749 | u32 reg; | |
750 | if (ent->device == MEI_DEV_ID_PBG_1) { | |
751 | pci_read_config_dword(pdev, 0x48, ®); | |
752 | /* make sure that bit 9 is up and bit 10 is down */ | |
753 | if ((reg & 0x600) == 0x200) { | |
754 | dev_info(&pdev->dev, "Device doesn't have valid ME Interface\n"); | |
755 | return false; | |
756 | } | |
757 | } | |
758 | return true; | |
759 | } | |
5b881e3c OW |
760 | /** |
761 | * mei_probe - Device Initialization Routine | |
762 | * | |
763 | * @pdev: PCI device structure | |
764 | * @ent: entry in kcs_pci_tbl | |
765 | * | |
766 | * returns 0 on success, <0 on failure. | |
767 | */ | |
80c8ae28 | 768 | static int mei_probe(struct pci_dev *pdev, |
5b881e3c OW |
769 | const struct pci_device_id *ent) |
770 | { | |
771 | struct mei_device *dev; | |
772 | int err; | |
773 | ||
774 | mutex_lock(&mei_mutex); | |
9a123f19 TW |
775 | |
776 | if (!mei_quirk_probe(pdev, ent)) { | |
777 | err = -ENODEV; | |
778 | goto end; | |
779 | } | |
780 | ||
daed6b5e | 781 | if (mei_pdev) { |
5b881e3c OW |
782 | err = -EEXIST; |
783 | goto end; | |
784 | } | |
785 | /* enable pci dev */ | |
786 | err = pci_enable_device(pdev); | |
787 | if (err) { | |
32c826b6 | 788 | dev_err(&pdev->dev, "failed to enable pci device.\n"); |
5b881e3c OW |
789 | goto end; |
790 | } | |
791 | /* set PCI host mastering */ | |
792 | pci_set_master(pdev); | |
793 | /* pci request regions for mei driver */ | |
068c0ae9 | 794 | err = pci_request_regions(pdev, KBUILD_MODNAME); |
5b881e3c | 795 | if (err) { |
32c826b6 | 796 | dev_err(&pdev->dev, "failed to get pci regions.\n"); |
5b881e3c OW |
797 | goto disable_device; |
798 | } | |
799 | /* allocates and initializes the mei dev structure */ | |
800 | dev = mei_device_init(pdev); | |
801 | if (!dev) { | |
802 | err = -ENOMEM; | |
803 | goto release_regions; | |
804 | } | |
805 | /* mapping IO device memory */ | |
806 | dev->mem_addr = pci_iomap(pdev, 0, 0); | |
807 | if (!dev->mem_addr) { | |
32c826b6 | 808 | dev_err(&pdev->dev, "mapping I/O device memory failure.\n"); |
5b881e3c OW |
809 | err = -ENOMEM; |
810 | goto free_device; | |
811 | } | |
812 | pci_enable_msi(pdev); | |
813 | ||
814 | /* request and enable interrupt */ | |
815 | if (pci_dev_msi_enabled(pdev)) | |
816 | err = request_threaded_irq(pdev->irq, | |
817 | NULL, | |
818 | mei_interrupt_thread_handler, | |
068c0ae9 | 819 | IRQF_ONESHOT, KBUILD_MODNAME, dev); |
5b881e3c OW |
820 | else |
821 | err = request_threaded_irq(pdev->irq, | |
822 | mei_interrupt_quick_handler, | |
823 | mei_interrupt_thread_handler, | |
068c0ae9 | 824 | IRQF_SHARED, KBUILD_MODNAME, dev); |
5b881e3c OW |
825 | |
826 | if (err) { | |
32c826b6 | 827 | dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", |
5b881e3c | 828 | pdev->irq); |
169dc388 | 829 | goto disable_msi; |
5b881e3c OW |
830 | } |
831 | INIT_DELAYED_WORK(&dev->timer_work, mei_timer); | |
c1174c0e SO |
832 | INIT_WORK(&dev->init_work, mei_host_client_init); |
833 | ||
5b881e3c | 834 | if (mei_hw_init(dev)) { |
32c826b6 | 835 | dev_err(&pdev->dev, "init hw failure.\n"); |
5b881e3c OW |
836 | err = -ENODEV; |
837 | goto release_irq; | |
838 | } | |
839 | ||
840 | err = misc_register(&mei_misc_device); | |
841 | if (err) | |
842 | goto release_irq; | |
843 | ||
daed6b5e | 844 | mei_pdev = pdev; |
5b881e3c OW |
845 | pci_set_drvdata(pdev, dev); |
846 | ||
847 | ||
848 | schedule_delayed_work(&dev->timer_work, HZ); | |
849 | ||
850 | mutex_unlock(&mei_mutex); | |
851 | ||
2f3d2b49 | 852 | pr_debug("initialization successful.\n"); |
5b881e3c OW |
853 | |
854 | return 0; | |
855 | ||
856 | release_irq: | |
857 | /* disable interrupts */ | |
858 | dev->host_hw_state = mei_hcsr_read(dev); | |
859 | mei_disable_interrupts(dev); | |
860 | flush_scheduled_work(); | |
861 | free_irq(pdev->irq, dev); | |
169dc388 | 862 | disable_msi: |
5b881e3c | 863 | pci_disable_msi(pdev); |
5b881e3c OW |
864 | pci_iounmap(pdev, dev->mem_addr); |
865 | free_device: | |
866 | kfree(dev); | |
867 | release_regions: | |
868 | pci_release_regions(pdev); | |
869 | disable_device: | |
870 | pci_disable_device(pdev); | |
871 | end: | |
872 | mutex_unlock(&mei_mutex); | |
32c826b6 | 873 | dev_err(&pdev->dev, "initialization failed.\n"); |
5b881e3c OW |
874 | return err; |
875 | } | |
876 | ||
877 | /** | |
878 | * mei_remove - Device Removal Routine | |
879 | * | |
880 | * @pdev: PCI device structure | |
881 | * | |
882 | * mei_remove is called by the PCI subsystem to alert the driver | |
883 | * that it should release a PCI device. | |
884 | */ | |
486a5c28 | 885 | static void mei_remove(struct pci_dev *pdev) |
5b881e3c OW |
886 | { |
887 | struct mei_device *dev; | |
888 | ||
daed6b5e | 889 | if (mei_pdev != pdev) |
5b881e3c OW |
890 | return; |
891 | ||
892 | dev = pci_get_drvdata(pdev); | |
893 | if (!dev) | |
894 | return; | |
895 | ||
896 | mutex_lock(&dev->device_lock); | |
897 | ||
c216fdeb TW |
898 | cancel_delayed_work(&dev->timer_work); |
899 | ||
900 | mei_wd_stop(dev); | |
5b881e3c | 901 | |
daed6b5e | 902 | mei_pdev = NULL; |
5b881e3c OW |
903 | |
904 | if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) { | |
905 | dev->iamthif_cl.state = MEI_FILE_DISCONNECTING; | |
906 | mei_disconnect_host_client(dev, &dev->iamthif_cl); | |
907 | } | |
908 | if (dev->wd_cl.state == MEI_FILE_CONNECTED) { | |
909 | dev->wd_cl.state = MEI_FILE_DISCONNECTING; | |
910 | mei_disconnect_host_client(dev, &dev->wd_cl); | |
911 | } | |
912 | ||
913 | /* Unregistering watchdog device */ | |
70cd5337 | 914 | mei_watchdog_unregister(dev); |
5b881e3c OW |
915 | |
916 | /* remove entry if already in list */ | |
917 | dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n"); | |
ff8b2f4e TW |
918 | mei_me_cl_unlink(dev, &dev->wd_cl); |
919 | mei_me_cl_unlink(dev, &dev->iamthif_cl); | |
5b881e3c OW |
920 | |
921 | dev->iamthif_current_cb = NULL; | |
922 | dev->me_clients_num = 0; | |
923 | ||
924 | mutex_unlock(&dev->device_lock); | |
925 | ||
926 | flush_scheduled_work(); | |
927 | ||
928 | /* disable interrupts */ | |
929 | mei_disable_interrupts(dev); | |
930 | ||
931 | free_irq(pdev->irq, dev); | |
932 | pci_disable_msi(pdev); | |
933 | pci_set_drvdata(pdev, NULL); | |
934 | ||
935 | if (dev->mem_addr) | |
936 | pci_iounmap(pdev, dev->mem_addr); | |
937 | ||
938 | kfree(dev); | |
939 | ||
940 | pci_release_regions(pdev); | |
941 | pci_disable_device(pdev); | |
a44cab4a TW |
942 | |
943 | misc_deregister(&mei_misc_device); | |
5b881e3c | 944 | } |
ab841160 OW |
945 | #ifdef CONFIG_PM |
946 | static int mei_pci_suspend(struct device *device) | |
947 | { | |
948 | struct pci_dev *pdev = to_pci_dev(device); | |
949 | struct mei_device *dev = pci_get_drvdata(pdev); | |
950 | int err; | |
951 | ||
952 | if (!dev) | |
953 | return -ENODEV; | |
954 | mutex_lock(&dev->device_lock); | |
c216fdeb TW |
955 | |
956 | cancel_delayed_work(&dev->timer_work); | |
957 | ||
ab841160 | 958 | /* Stop watchdog if exists */ |
c216fdeb | 959 | err = mei_wd_stop(dev); |
ab841160 | 960 | /* Set new mei state */ |
b210d750 TW |
961 | if (dev->dev_state == MEI_DEV_ENABLED || |
962 | dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) { | |
963 | dev->dev_state = MEI_DEV_POWER_DOWN; | |
ab841160 OW |
964 | mei_reset(dev, 0); |
965 | } | |
966 | mutex_unlock(&dev->device_lock); | |
967 | ||
968 | free_irq(pdev->irq, dev); | |
4f61a7ad | 969 | pci_disable_msi(pdev); |
ab841160 OW |
970 | |
971 | return err; | |
972 | } | |
973 | ||
974 | static int mei_pci_resume(struct device *device) | |
975 | { | |
976 | struct pci_dev *pdev = to_pci_dev(device); | |
977 | struct mei_device *dev; | |
978 | int err; | |
979 | ||
980 | dev = pci_get_drvdata(pdev); | |
981 | if (!dev) | |
982 | return -ENODEV; | |
983 | ||
4f61a7ad TW |
984 | pci_enable_msi(pdev); |
985 | ||
986 | /* request and enable interrupt */ | |
987 | if (pci_dev_msi_enabled(pdev)) | |
988 | err = request_threaded_irq(pdev->irq, | |
989 | NULL, | |
990 | mei_interrupt_thread_handler, | |
068c0ae9 | 991 | IRQF_ONESHOT, KBUILD_MODNAME, dev); |
4f61a7ad TW |
992 | else |
993 | err = request_threaded_irq(pdev->irq, | |
ab841160 OW |
994 | mei_interrupt_quick_handler, |
995 | mei_interrupt_thread_handler, | |
068c0ae9 | 996 | IRQF_SHARED, KBUILD_MODNAME, dev); |
4f61a7ad | 997 | |
ab841160 | 998 | if (err) { |
32c826b6 TW |
999 | dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", |
1000 | pdev->irq); | |
ab841160 OW |
1001 | return err; |
1002 | } | |
1003 | ||
1004 | mutex_lock(&dev->device_lock); | |
b210d750 | 1005 | dev->dev_state = MEI_DEV_POWER_UP; |
ab841160 OW |
1006 | mei_reset(dev, 1); |
1007 | mutex_unlock(&dev->device_lock); | |
1008 | ||
6d70e935 OW |
1009 | /* Start timer if stopped in suspend */ |
1010 | schedule_delayed_work(&dev->timer_work, HZ); | |
1011 | ||
ab841160 OW |
1012 | return err; |
1013 | } | |
1014 | static SIMPLE_DEV_PM_OPS(mei_pm_ops, mei_pci_suspend, mei_pci_resume); | |
1015 | #define MEI_PM_OPS (&mei_pm_ops) | |
1016 | #else | |
2d990362 | 1017 | #define MEI_PM_OPS NULL |
ab841160 OW |
1018 | #endif /* CONFIG_PM */ |
1019 | /* | |
1020 | * PCI driver structure | |
1021 | */ | |
1022 | static struct pci_driver mei_driver = { | |
068c0ae9 | 1023 | .name = KBUILD_MODNAME, |
ab841160 OW |
1024 | .id_table = mei_pci_tbl, |
1025 | .probe = mei_probe, | |
9306a8b0 BP |
1026 | .remove = mei_remove, |
1027 | .shutdown = mei_remove, | |
ab841160 OW |
1028 | .driver.pm = MEI_PM_OPS, |
1029 | }; | |
1030 | ||
6078188e | 1031 | module_pci_driver(mei_driver); |
ab841160 OW |
1032 | |
1033 | MODULE_AUTHOR("Intel Corporation"); | |
1034 | MODULE_DESCRIPTION("Intel(R) Management Engine Interface"); | |
1035 | MODULE_LICENSE("GPL v2"); |