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authorTomas Winkler <tomas.winkler@intel.com>2012-11-01 15:17:15 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-11-01 15:31:19 -0400
commit19838fb85306905a373b6449c1428791d653fc21 (patch)
tree09c793c5b27f95494c6a4548af7e420666a108bf /drivers/misc
parent3870c3206b96c900ce29c8068bd5ad46fae71f5b (diff)
mei: extract AMTHI functions into the amthif.c file
Move AMT Host Interface functions into the new amthif.c file. All functions has now common prefix: mei_amthif_ Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/mei/Makefile1
-rw-r--r--drivers/misc/mei/amthif.c572
-rw-r--r--drivers/misc/mei/init.c73
-rw-r--r--drivers/misc/mei/interrupt.c218
-rw-r--r--drivers/misc/mei/iorw.c266
-rw-r--r--drivers/misc/mei/main.c10
-rw-r--r--drivers/misc/mei/mei_dev.h29
7 files changed, 613 insertions, 556 deletions
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile
index 57168db6c7e5..0017842e166c 100644
--- a/drivers/misc/mei/Makefile
+++ b/drivers/misc/mei/Makefile
@@ -8,4 +8,5 @@ mei-objs += interrupt.o
8mei-objs += interface.o 8mei-objs += interface.o
9mei-objs += iorw.o 9mei-objs += iorw.o
10mei-objs += main.o 10mei-objs += main.o
11mei-objs += amthif.o
11mei-objs += wd.o 12mei-objs += wd.o
diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
new file mode 100644
index 000000000000..392203d8d254
--- /dev/null
+++ b/drivers/misc/mei/amthif.c
@@ -0,0 +1,572 @@
1/*
2 *
3 * Intel Management Engine Interface (Intel MEI) Linux driver
4 * Copyright (c) 2003-2012, Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 */
16
17#include <linux/kernel.h>
18#include <linux/fs.h>
19#include <linux/errno.h>
20#include <linux/types.h>
21#include <linux/fcntl.h>
22#include <linux/aio.h>
23#include <linux/pci.h>
24#include <linux/init.h>
25#include <linux/ioctl.h>
26#include <linux/cdev.h>
27#include <linux/list.h>
28#include <linux/delay.h>
29#include <linux/sched.h>
30#include <linux/uuid.h>
31#include <linux/jiffies.h>
32#include <linux/uaccess.h>
33
34
35#include "mei_dev.h"
36#include "hw.h"
37#include <linux/mei.h>
38#include "interface.h"
39
40const uuid_le mei_amthi_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, 0xac,
41 0xa8, 0x46, 0xe0, 0xff, 0x65,
42 0x81, 0x4c);
43
44/**
45 * mei_amthif_reset_params - initializes mei device iamthif
46 *
47 * @dev: the device structure
48 */
49void mei_amthif_reset_params(struct mei_device *dev)
50{
51 /* reset iamthif parameters. */
52 dev->iamthif_current_cb = NULL;
53 dev->iamthif_msg_buf_size = 0;
54 dev->iamthif_msg_buf_index = 0;
55 dev->iamthif_canceled = false;
56 dev->iamthif_ioctl = false;
57 dev->iamthif_state = MEI_IAMTHIF_IDLE;
58 dev->iamthif_timer = 0;
59}
60
61/**
62 * mei_amthif_host_init_ - mei initialization amthif client.
63 *
64 * @dev: the device structure
65 *
66 */
67void mei_amthif_host_init(struct mei_device *dev)
68{
69 int i;
70 unsigned char *msg_buf;
71
72 mei_cl_init(&dev->iamthif_cl, dev);
73 dev->iamthif_cl.state = MEI_FILE_DISCONNECTED;
74
75 /* find ME amthi client */
76 i = mei_me_cl_update_filext(dev, &dev->iamthif_cl,
77 &mei_amthi_guid, MEI_IAMTHIF_HOST_CLIENT_ID);
78 if (i < 0) {
79 dev_dbg(&dev->pdev->dev, "failed to find iamthif client.\n");
80 return;
81 }
82
83 /* Assign iamthif_mtu to the value received from ME */
84
85 dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length;
86 dev_dbg(&dev->pdev->dev, "IAMTHIF_MTU = %d\n",
87 dev->me_clients[i].props.max_msg_length);
88
89 kfree(dev->iamthif_msg_buf);
90 dev->iamthif_msg_buf = NULL;
91
92 /* allocate storage for ME message buffer */
93 msg_buf = kcalloc(dev->iamthif_mtu,
94 sizeof(unsigned char), GFP_KERNEL);
95 if (!msg_buf) {
96 dev_dbg(&dev->pdev->dev, "memory allocation for ME message buffer failed.\n");
97 return;
98 }
99
100 dev->iamthif_msg_buf = msg_buf;
101
102 if (mei_connect(dev, &dev->iamthif_cl)) {
103 dev_dbg(&dev->pdev->dev, "Failed to connect to AMTHI client\n");
104 dev->iamthif_cl.state = MEI_FILE_DISCONNECTED;
105 dev->iamthif_cl.host_client_id = 0;
106 } else {
107 dev->iamthif_cl.timer_count = MEI_CONNECT_TIMEOUT;
108 }
109}
110
111/**
112 * mei_amthif_find_read_list_entry - finds a amthilist entry for current file
113 *
114 * @dev: the device structure
115 * @file: pointer to file object
116 *
117 * returns returned a list entry on success, NULL on failure.
118 */
119struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
120 struct file *file)
121{
122 struct mei_cl *cl_temp;
123 struct mei_cl_cb *pos = NULL;
124 struct mei_cl_cb *next = NULL;
125
126 list_for_each_entry_safe(pos, next,
127 &dev->amthi_read_complete_list.list, list) {
128 cl_temp = (struct mei_cl *)pos->file_private;
129 if (cl_temp && cl_temp == &dev->iamthif_cl &&
130 pos->file_object == file)
131 return pos;
132 }
133 return NULL;
134}
135
136
137/**
138 * mei_amthif_read - read data from AMTHIF client
139 *
140 * @dev: the device structure
141 * @if_num: minor number
142 * @file: pointer to file object
143 * @*ubuf: pointer to user data in user space
144 * @length: data length to read
145 * @offset: data read offset
146 *
147 * Locking: called under "dev->device_lock" lock
148 *
149 * returns
150 * returned data length on success,
151 * zero if no data to read,
152 * negative on failure.
153 */
154int mei_amthif_read(struct mei_device *dev, struct file *file,
155 char __user *ubuf, size_t length, loff_t *offset)
156{
157 int rets;
158 int wait_ret;
159 struct mei_cl_cb *cb = NULL;
160 struct mei_cl *cl = file->private_data;
161 unsigned long timeout;
162 int i;
163
164 /* Only Posible if we are in timeout */
165 if (!cl || cl != &dev->iamthif_cl) {
166 dev_dbg(&dev->pdev->dev, "bad file ext.\n");
167 return -ETIMEDOUT;
168 }
169
170 i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id);
171
172 if (i < 0) {
173 dev_dbg(&dev->pdev->dev, "amthi client not found.\n");
174 return -ENODEV;
175 }
176 dev_dbg(&dev->pdev->dev, "checking amthi data\n");
177 cb = mei_amthif_find_read_list_entry(dev, file);
178
179 /* Check for if we can block or not*/
180 if (cb == NULL && file->f_flags & O_NONBLOCK)
181 return -EAGAIN;
182
183
184 dev_dbg(&dev->pdev->dev, "waiting for amthi data\n");
185 while (cb == NULL) {
186 /* unlock the Mutex */
187 mutex_unlock(&dev->device_lock);
188
189 wait_ret = wait_event_interruptible(dev->iamthif_cl.wait,
190 (cb = mei_amthif_find_read_list_entry(dev, file)));
191
192 if (wait_ret)
193 return -ERESTARTSYS;
194
195 dev_dbg(&dev->pdev->dev, "woke up from sleep\n");
196
197 /* Locking again the Mutex */
198 mutex_lock(&dev->device_lock);
199 }
200
201
202 dev_dbg(&dev->pdev->dev, "Got amthi data\n");
203 dev->iamthif_timer = 0;
204
205 if (cb) {
206 timeout = cb->read_time +
207 mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER);
208 dev_dbg(&dev->pdev->dev, "amthi timeout = %lud\n",
209 timeout);
210
211 if (time_after(jiffies, timeout)) {
212 dev_dbg(&dev->pdev->dev, "amthi Time out\n");
213 /* 15 sec for the message has expired */
214 list_del(&cb->list);
215 rets = -ETIMEDOUT;
216 goto free;
217 }
218 }
219 /* if the whole message will fit remove it from the list */
220 if (cb->buf_idx >= *offset && length >= (cb->buf_idx - *offset))
221 list_del(&cb->list);
222 else if (cb->buf_idx > 0 && cb->buf_idx <= *offset) {
223 /* end of the message has been reached */
224 list_del(&cb->list);
225 rets = 0;
226 goto free;
227 }
228 /* else means that not full buffer will be read and do not
229 * remove message from deletion list
230 */
231
232 dev_dbg(&dev->pdev->dev, "amthi cb->response_buffer size - %d\n",
233 cb->response_buffer.size);
234 dev_dbg(&dev->pdev->dev, "amthi cb->buf_idx - %lu\n", cb->buf_idx);
235
236 /* length is being turncated to PAGE_SIZE, however,
237 * the buf_idx may point beyond */
238 length = min_t(size_t, length, (cb->buf_idx - *offset));
239
240 if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length))
241 rets = -EFAULT;
242 else {
243 rets = length;
244 if ((*offset + length) < cb->buf_idx) {
245 *offset += length;
246 goto out;
247 }
248 }
249free:
250 dev_dbg(&dev->pdev->dev, "free amthi cb memory.\n");
251 *offset = 0;
252 mei_io_cb_free(cb);
253out:
254 return rets;
255}
256
257/**
258 * mei_amthif_write - write amthif data to amthif client
259 *
260 * @dev: the device structure
261 * @cb: mei call back struct
262 *
263 * returns 0 on success, <0 on failure.
264 */
265int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *cb)
266{
267 struct mei_msg_hdr mei_hdr;
268 int ret;
269
270 if (!dev || !cb)
271 return -ENODEV;
272
273 dev_dbg(&dev->pdev->dev, "write data to amthi client.\n");
274
275 dev->iamthif_state = MEI_IAMTHIF_WRITING;
276 dev->iamthif_current_cb = cb;
277 dev->iamthif_file_object = cb->file_object;
278 dev->iamthif_canceled = false;
279 dev->iamthif_ioctl = true;
280 dev->iamthif_msg_buf_size = cb->request_buffer.size;
281 memcpy(dev->iamthif_msg_buf, cb->request_buffer.data,
282 cb->request_buffer.size);
283
284 ret = mei_flow_ctrl_creds(dev, &dev->iamthif_cl);
285 if (ret < 0)
286 return ret;
287
288 if (ret && dev->mei_host_buffer_is_empty) {
289 ret = 0;
290 dev->mei_host_buffer_is_empty = false;
291 if (cb->request_buffer.size > mei_hbuf_max_data(dev)) {
292 mei_hdr.length = mei_hbuf_max_data(dev);
293 mei_hdr.msg_complete = 0;
294 } else {
295 mei_hdr.length = cb->request_buffer.size;
296 mei_hdr.msg_complete = 1;
297 }
298
299 mei_hdr.host_addr = dev->iamthif_cl.host_client_id;
300 mei_hdr.me_addr = dev->iamthif_cl.me_client_id;
301 mei_hdr.reserved = 0;
302 dev->iamthif_msg_buf_index += mei_hdr.length;
303 if (mei_write_message(dev, &mei_hdr,
304 (unsigned char *)(dev->iamthif_msg_buf),
305 mei_hdr.length))
306 return -ENODEV;
307
308 if (mei_hdr.msg_complete) {
309 if (mei_flow_ctrl_reduce(dev, &dev->iamthif_cl))
310 return -ENODEV;
311 dev->iamthif_flow_control_pending = true;
312 dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
313 dev_dbg(&dev->pdev->dev, "add amthi cb to write waiting list\n");
314 dev->iamthif_current_cb = cb;
315 dev->iamthif_file_object = cb->file_object;
316 list_add_tail(&cb->list, &dev->write_waiting_list.list);
317 } else {
318 dev_dbg(&dev->pdev->dev, "message does not complete, so add amthi cb to write list.\n");
319 list_add_tail(&cb->list, &dev->write_list.list);
320 }
321 } else {
322 if (!(dev->mei_host_buffer_is_empty))
323 dev_dbg(&dev->pdev->dev, "host buffer is not empty");
324
325 dev_dbg(&dev->pdev->dev, "No flow control credentials, so add iamthif cb to write list.\n");
326 list_add_tail(&cb->list, &dev->write_list.list);
327 }
328 return 0;
329}
330
331/**
332 * mei_amthif_run_next_cmd
333 *
334 * @dev: the device structure
335 *
336 * returns 0 on success, <0 on failure.
337 */
338void mei_amthif_run_next_cmd(struct mei_device *dev)
339{
340 struct mei_cl *cl_tmp;
341 struct mei_cl_cb *pos = NULL;
342 struct mei_cl_cb *next = NULL;
343 int status;
344
345 if (!dev)
346 return;
347
348 dev->iamthif_msg_buf_size = 0;
349 dev->iamthif_msg_buf_index = 0;
350 dev->iamthif_canceled = false;
351 dev->iamthif_ioctl = true;
352 dev->iamthif_state = MEI_IAMTHIF_IDLE;
353 dev->iamthif_timer = 0;
354 dev->iamthif_file_object = NULL;
355
356 dev_dbg(&dev->pdev->dev, "complete amthi cmd_list cb.\n");
357
358 list_for_each_entry_safe(pos, next, &dev->amthi_cmd_list.list, list) {
359 list_del(&pos->list);
360 cl_tmp = (struct mei_cl *)pos->file_private;
361
362 if (cl_tmp && cl_tmp == &dev->iamthif_cl) {
363 status = mei_amthif_write(dev, pos);
364 if (status) {
365 dev_dbg(&dev->pdev->dev,
366 "amthi write failed status = %d\n",
367 status);
368 return;
369 }
370 break;
371 }
372 }
373}
374
375/**
376 * mei_amthif_irq_process_completed - processes completed iamthif operation.
377 *
378 * @dev: the device structure.
379 * @slots: free slots.
380 * @cb_pos: callback block.
381 * @cl: private data of the file object.
382 * @cmpl_list: complete list.
383 *
384 * returns 0, OK; otherwise, error.
385 */
386int mei_amthif_irq_process_completed(struct mei_device *dev, s32 *slots,
387 struct mei_cl_cb *cb_pos,
388 struct mei_cl *cl,
389 struct mei_cl_cb *cmpl_list)
390{
391 struct mei_msg_hdr *mei_hdr;
392
393 if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
394 dev->iamthif_msg_buf_size -
395 dev->iamthif_msg_buf_index)) {
396 mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
397 mei_hdr->host_addr = cl->host_client_id;
398 mei_hdr->me_addr = cl->me_client_id;
399 mei_hdr->length = dev->iamthif_msg_buf_size -
400 dev->iamthif_msg_buf_index;
401 mei_hdr->msg_complete = 1;
402 mei_hdr->reserved = 0;
403
404 *slots -= mei_data2slots(mei_hdr->length);
405
406 if (mei_write_message(dev, mei_hdr,
407 (dev->iamthif_msg_buf +
408 dev->iamthif_msg_buf_index),
409 mei_hdr->length)) {
410 dev->iamthif_state = MEI_IAMTHIF_IDLE;
411 cl->status = -ENODEV;
412 list_del(&cb_pos->list);
413 return -ENODEV;
414 } else {
415 if (mei_flow_ctrl_reduce(dev, cl))
416 return -ENODEV;
417 dev->iamthif_msg_buf_index += mei_hdr->length;
418 cb_pos->buf_idx = dev->iamthif_msg_buf_index;
419 cl->status = 0;
420 dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
421 dev->iamthif_flow_control_pending = true;
422 /* save iamthif cb sent to amthi client */
423 dev->iamthif_current_cb = cb_pos;
424 list_move_tail(&cb_pos->list,
425 &dev->write_waiting_list.list);
426
427 }
428 } else if (*slots == dev->hbuf_depth) {
429 /* buffer is still empty */
430 mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
431 mei_hdr->host_addr = cl->host_client_id;
432 mei_hdr->me_addr = cl->me_client_id;
433 mei_hdr->length =
434 (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
435 mei_hdr->msg_complete = 0;
436 mei_hdr->reserved = 0;
437
438 *slots -= mei_data2slots(mei_hdr->length);
439
440 if (mei_write_message(dev, mei_hdr,
441 (dev->iamthif_msg_buf +
442 dev->iamthif_msg_buf_index),
443 mei_hdr->length)) {
444 cl->status = -ENODEV;
445 list_del(&cb_pos->list);
446 } else {
447 dev->iamthif_msg_buf_index += mei_hdr->length;
448 }
449 return -EMSGSIZE;
450 } else {
451 return -EBADMSG;
452 }
453
454 return 0;
455}
456
457/**
458 * mei_amthif_irq_read_message - read routine after ISR to
459 * handle the read amthi message
460 *
461 * @complete_list: An instance of our list structure
462 * @dev: the device structure
463 * @mei_hdr: header of amthi message
464 *
465 * returns 0 on success, <0 on failure.
466 */
467int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list,
468 struct mei_device *dev, struct mei_msg_hdr *mei_hdr)
469{
470 struct mei_cl *cl;
471 struct mei_cl_cb *cb;
472 unsigned char *buffer;
473
474 BUG_ON(mei_hdr->me_addr != dev->iamthif_cl.me_client_id);
475 BUG_ON(dev->iamthif_state != MEI_IAMTHIF_READING);
476
477 buffer = dev->iamthif_msg_buf + dev->iamthif_msg_buf_index;
478 BUG_ON(dev->iamthif_mtu < dev->iamthif_msg_buf_index + mei_hdr->length);
479
480 mei_read_slots(dev, buffer, mei_hdr->length);
481
482 dev->iamthif_msg_buf_index += mei_hdr->length;
483
484 if (!mei_hdr->msg_complete)
485 return 0;
486
487 dev_dbg(&dev->pdev->dev,
488 "amthi_message_buffer_index =%d\n",
489 mei_hdr->length);
490
491 dev_dbg(&dev->pdev->dev, "completed amthi read.\n ");
492 if (!dev->iamthif_current_cb)
493 return -ENODEV;
494
495 cb = dev->iamthif_current_cb;
496 dev->iamthif_current_cb = NULL;
497
498 cl = (struct mei_cl *)cb->file_private;
499 if (!cl)
500 return -ENODEV;
501
502 dev->iamthif_stall_timer = 0;
503 cb->buf_idx = dev->iamthif_msg_buf_index;
504 cb->read_time = jiffies;
505 if (dev->iamthif_ioctl && cl == &dev->iamthif_cl) {
506 /* found the iamthif cb */
507 dev_dbg(&dev->pdev->dev, "complete the amthi read cb.\n ");
508 dev_dbg(&dev->pdev->dev, "add the amthi read cb to complete.\n ");
509 list_add_tail(&cb->list, &complete_list->list);
510 }
511 return 0;
512}
513
514/**
515 * mei_amthif_irq_read - prepares to read amthif data.
516 *
517 * @dev: the device structure.
518 * @slots: free slots.
519 *
520 * returns 0, OK; otherwise, error.
521 */
522int mei_amthif_irq_read(struct mei_device *dev, s32 *slots)
523{
524
525 if (((*slots) * sizeof(u32)) < (sizeof(struct mei_msg_hdr)
526 + sizeof(struct hbm_flow_control))) {
527 return -EMSGSIZE;
528 }
529 *slots -= mei_data2slots(sizeof(struct hbm_flow_control));
530 if (mei_send_flow_control(dev, &dev->iamthif_cl)) {
531 dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n");
532 return -EIO;
533 }
534
535 dev_dbg(&dev->pdev->dev, "iamthif flow control success\n");
536 dev->iamthif_state = MEI_IAMTHIF_READING;
537 dev->iamthif_flow_control_pending = false;
538 dev->iamthif_msg_buf_index = 0;
539 dev->iamthif_msg_buf_size = 0;
540 dev->iamthif_stall_timer = MEI_IAMTHIF_STALL_TIMER;
541 dev->mei_host_buffer_is_empty = mei_hbuf_is_empty(dev);
542 return 0;
543}
544
545/**
546 * mei_amthif_complete - complete amthif callback.
547 *
548 * @dev: the device structure.
549 * @cb_pos: callback block.
550 */
551void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb)
552{
553 if (dev->iamthif_canceled != 1) {
554 dev->iamthif_state = MEI_IAMTHIF_READ_COMPLETE;
555 dev->iamthif_stall_timer = 0;
556 memcpy(cb->response_buffer.data,
557 dev->iamthif_msg_buf,
558 dev->iamthif_msg_buf_index);
559 list_add_tail(&cb->list, &dev->amthi_read_complete_list.list);
560 dev_dbg(&dev->pdev->dev, "amthi read completed\n");
561 dev->iamthif_timer = jiffies;
562 dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n",
563 dev->iamthif_timer);
564 } else {
565 mei_amthif_run_next_cmd(dev);
566 }
567
568 dev_dbg(&dev->pdev->dev, "completing amthi call back.\n");
569 wake_up_interruptible(&dev->iamthif_cl.wait);
570}
571
572
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index e6951ec4840f..4a8eb920f7fb 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -43,10 +43,6 @@ const char *mei_dev_state_str(int state)
43} 43}
44 44
45 45
46const uuid_le mei_amthi_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, 0xac,
47 0xa8, 0x46, 0xe0, 0xff, 0x65,
48 0x81, 0x4c);
49
50/** 46/**
51 * mei_io_list_flush - removes list entry belonging to cl. 47 * mei_io_list_flush - removes list entry belonging to cl.
52 * 48 *
@@ -92,23 +88,6 @@ int mei_cl_flush_queues(struct mei_cl *cl)
92 88
93 89
94/** 90/**
95 * mei_reset_iamthif_params - initializes mei device iamthif
96 *
97 * @dev: the device structure
98 */
99static void mei_reset_iamthif_params(struct mei_device *dev)
100{
101 /* reset iamthif parameters. */
102 dev->iamthif_current_cb = NULL;
103 dev->iamthif_msg_buf_size = 0;
104 dev->iamthif_msg_buf_index = 0;
105 dev->iamthif_canceled = false;
106 dev->iamthif_ioctl = false;
107 dev->iamthif_state = MEI_IAMTHIF_IDLE;
108 dev->iamthif_timer = 0;
109}
110
111/**
112 * init_mei_device - allocates and initializes the mei device structure 91 * init_mei_device - allocates and initializes the mei device structure
113 * 92 *
114 * @pdev: The pci device structure 93 * @pdev: The pci device structure
@@ -313,7 +292,7 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
313 mei_remove_client_from_file_list(dev, 292 mei_remove_client_from_file_list(dev,
314 dev->iamthif_cl.host_client_id); 293 dev->iamthif_cl.host_client_id);
315 294
316 mei_reset_iamthif_params(dev); 295 mei_amthif_reset_params(dev);
317 dev->extra_write_index = 0; 296 dev->extra_write_index = 0;
318 } 297 }
319 298
@@ -577,56 +556,6 @@ int mei_me_cl_update_filext(struct mei_device *dev, struct mei_cl *cl,
577} 556}
578 557
579/** 558/**
580 * host_init_iamthif - mei initialization iamthif client.
581 *
582 * @dev: the device structure
583 *
584 */
585void mei_host_init_iamthif(struct mei_device *dev)
586{
587 int i;
588 unsigned char *msg_buf;
589
590 mei_cl_init(&dev->iamthif_cl, dev);
591 dev->iamthif_cl.state = MEI_FILE_DISCONNECTED;
592
593 /* find ME amthi client */
594 i = mei_me_cl_update_filext(dev, &dev->iamthif_cl,
595 &mei_amthi_guid, MEI_IAMTHIF_HOST_CLIENT_ID);
596 if (i < 0) {
597 dev_dbg(&dev->pdev->dev, "failed to find iamthif client.\n");
598 return;
599 }
600
601 /* Assign iamthif_mtu to the value received from ME */
602
603 dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length;
604 dev_dbg(&dev->pdev->dev, "IAMTHIF_MTU = %d\n",
605 dev->me_clients[i].props.max_msg_length);
606
607 kfree(dev->iamthif_msg_buf);
608 dev->iamthif_msg_buf = NULL;
609
610 /* allocate storage for ME message buffer */
611 msg_buf = kcalloc(dev->iamthif_mtu,
612 sizeof(unsigned char), GFP_KERNEL);
613 if (!msg_buf) {
614 dev_dbg(&dev->pdev->dev, "memory allocation for ME message buffer failed.\n");
615 return;
616 }
617
618 dev->iamthif_msg_buf = msg_buf;
619
620 if (mei_connect(dev, &dev->iamthif_cl)) {
621 dev_dbg(&dev->pdev->dev, "Failed to connect to AMTHI client\n");
622 dev->iamthif_cl.state = MEI_FILE_DISCONNECTED;
623 dev->iamthif_cl.host_client_id = 0;
624 } else {
625 dev->iamthif_cl.timer_count = MEI_CONNECT_TIMEOUT;
626 }
627}
628
629/**
630 * mei_alloc_file_private - allocates a private file structure and sets it up. 559 * mei_alloc_file_private - allocates a private file structure and sets it up.
631 * @file: the file structure 560 * @file: the file structure
632 * 561 *
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 248f581bde31..62f8b65fd11a 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -74,92 +74,6 @@ static void _mei_cmpl(struct mei_cl *cl, struct mei_cl_cb *cb_pos)
74} 74}
75 75
76/** 76/**
77 * _mei_cmpl_iamthif - processes completed iamthif operation.
78 *
79 * @dev: the device structure.
80 * @cb_pos: callback block.
81 */
82static void _mei_cmpl_iamthif(struct mei_device *dev, struct mei_cl_cb *cb_pos)
83{
84 if (dev->iamthif_canceled != 1) {
85 dev->iamthif_state = MEI_IAMTHIF_READ_COMPLETE;
86 dev->iamthif_stall_timer = 0;
87 memcpy(cb_pos->response_buffer.data,
88 dev->iamthif_msg_buf,
89 dev->iamthif_msg_buf_index);
90 list_add_tail(&cb_pos->list, &dev->amthi_read_complete_list.list);
91 dev_dbg(&dev->pdev->dev, "amthi read completed\n");
92 dev->iamthif_timer = jiffies;
93 dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n",
94 dev->iamthif_timer);
95 } else {
96 mei_run_next_iamthif_cmd(dev);
97 }
98
99 dev_dbg(&dev->pdev->dev, "completing amthi call back.\n");
100 wake_up_interruptible(&dev->iamthif_cl.wait);
101}
102
103
104/**
105 * mei_irq_thread_read_amthi_message - bottom half read routine after ISR to
106 * handle the read amthi message data processing.
107 *
108 * @complete_list: An instance of our list structure
109 * @dev: the device structure
110 * @mei_hdr: header of amthi message
111 *
112 * returns 0 on success, <0 on failure.
113 */
114static int mei_irq_thread_read_amthi_message(struct mei_cl_cb *complete_list,
115 struct mei_device *dev,
116 struct mei_msg_hdr *mei_hdr)
117{
118 struct mei_cl *cl;
119 struct mei_cl_cb *cb;
120 unsigned char *buffer;
121
122 BUG_ON(mei_hdr->me_addr != dev->iamthif_cl.me_client_id);
123 BUG_ON(dev->iamthif_state != MEI_IAMTHIF_READING);
124
125 buffer = dev->iamthif_msg_buf + dev->iamthif_msg_buf_index;
126 BUG_ON(dev->iamthif_mtu < dev->iamthif_msg_buf_index + mei_hdr->length);
127
128 mei_read_slots(dev, buffer, mei_hdr->length);
129
130 dev->iamthif_msg_buf_index += mei_hdr->length;
131
132 if (!mei_hdr->msg_complete)
133 return 0;
134
135 dev_dbg(&dev->pdev->dev,
136 "amthi_message_buffer_index =%d\n",
137 mei_hdr->length);
138
139 dev_dbg(&dev->pdev->dev, "completed amthi read.\n ");
140 if (!dev->iamthif_current_cb)
141 return -ENODEV;
142
143 cb = dev->iamthif_current_cb;
144 dev->iamthif_current_cb = NULL;
145
146 cl = (struct mei_cl *)cb->file_private;
147 if (!cl)
148 return -ENODEV;
149
150 dev->iamthif_stall_timer = 0;
151 cb->buf_idx = dev->iamthif_msg_buf_index;
152 cb->read_time = jiffies;
153 if (dev->iamthif_ioctl && cl == &dev->iamthif_cl) {
154 /* found the iamthif cb */
155 dev_dbg(&dev->pdev->dev, "complete the amthi read cb.\n ");
156 dev_dbg(&dev->pdev->dev, "add the amthi read cb to complete.\n ");
157 list_add_tail(&cb->list, &complete_list->list);
158 }
159 return 0;
160}
161
162/**
163 * _mei_irq_thread_state_ok - checks if mei header matches file private data 77 * _mei_irq_thread_state_ok - checks if mei header matches file private data
164 * 78 *
165 * @cl: private data of the file object 79 * @cl: private data of the file object
@@ -244,37 +158,6 @@ quit:
244} 158}
245 159
246/** 160/**
247 * _mei_irq_thread_iamthif_read - prepares to read iamthif data.
248 *
249 * @dev: the device structure.
250 * @slots: free slots.
251 *
252 * returns 0, OK; otherwise, error.
253 */
254static int _mei_irq_thread_iamthif_read(struct mei_device *dev, s32 *slots)
255{
256
257 if (((*slots) * sizeof(u32)) < (sizeof(struct mei_msg_hdr)
258 + sizeof(struct hbm_flow_control))) {
259 return -EMSGSIZE;
260 }
261 *slots -= mei_data2slots(sizeof(struct hbm_flow_control));
262 if (mei_send_flow_control(dev, &dev->iamthif_cl)) {
263 dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n");
264 return -EIO;
265 }
266
267 dev_dbg(&dev->pdev->dev, "iamthif flow control success\n");
268 dev->iamthif_state = MEI_IAMTHIF_READING;
269 dev->iamthif_flow_control_pending = false;
270 dev->iamthif_msg_buf_index = 0;
271 dev->iamthif_msg_buf_size = 0;
272 dev->iamthif_stall_timer = MEI_IAMTHIF_STALL_TIMER;
273 dev->mei_host_buffer_is_empty = mei_hbuf_is_empty(dev);
274 return 0;
275}
276
277/**
278 * _mei_irq_thread_close - processes close related operation. 161 * _mei_irq_thread_close - processes close related operation.
279 * 162 *
280 * @dev: the device structure. 163 * @dev: the device structure.
@@ -370,7 +253,7 @@ static void mei_client_connect_response(struct mei_device *dev,
370 mei_watchdog_register(dev); 253 mei_watchdog_register(dev);
371 254
372 /* next step in the state maching */ 255 /* next step in the state maching */
373 mei_host_init_iamthif(dev); 256 mei_amthif_host_init(dev);
374 return; 257 return;
375 } 258 }
376 259
@@ -728,7 +611,7 @@ static void mei_irq_thread_read_bus_message(struct mei_device *dev,
728 * will be received 611 * will be received
729 */ 612 */
730 if (mei_wd_host_init(dev)) 613 if (mei_wd_host_init(dev))
731 mei_host_init_iamthif(dev); 614 mei_amthif_host_init(dev);
732 } 615 }
733 616
734 } else { 617 } else {
@@ -964,87 +847,6 @@ static int _mei_irq_thread_cmpl(struct mei_device *dev, s32 *slots,
964} 847}
965 848
966/** 849/**
967 * _mei_irq_thread_cmpl_iamthif - processes completed iamthif operation.
968 *
969 * @dev: the device structure.
970 * @slots: free slots.
971 * @cb_pos: callback block.
972 * @cl: private data of the file object.
973 * @cmpl_list: complete list.
974 *
975 * returns 0, OK; otherwise, error.
976 */
977static int _mei_irq_thread_cmpl_iamthif(struct mei_device *dev, s32 *slots,
978 struct mei_cl_cb *cb_pos,
979 struct mei_cl *cl,
980 struct mei_cl_cb *cmpl_list)
981{
982 struct mei_msg_hdr *mei_hdr;
983
984 if ((*slots * sizeof(u32)) >= (sizeof(struct mei_msg_hdr) +
985 dev->iamthif_msg_buf_size -
986 dev->iamthif_msg_buf_index)) {
987 mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
988 mei_hdr->host_addr = cl->host_client_id;
989 mei_hdr->me_addr = cl->me_client_id;
990 mei_hdr->length = dev->iamthif_msg_buf_size -
991 dev->iamthif_msg_buf_index;
992 mei_hdr->msg_complete = 1;
993 mei_hdr->reserved = 0;
994
995 *slots -= mei_data2slots(mei_hdr->length);
996
997 if (mei_write_message(dev, mei_hdr,
998 (dev->iamthif_msg_buf +
999 dev->iamthif_msg_buf_index),
1000 mei_hdr->length)) {
1001 dev->iamthif_state = MEI_IAMTHIF_IDLE;
1002 cl->status = -ENODEV;
1003 list_del(&cb_pos->list);
1004 return -ENODEV;
1005 } else {
1006 if (mei_flow_ctrl_reduce(dev, cl))
1007 return -ENODEV;
1008 dev->iamthif_msg_buf_index += mei_hdr->length;
1009 cb_pos->buf_idx = dev->iamthif_msg_buf_index;
1010 cl->status = 0;
1011 dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
1012 dev->iamthif_flow_control_pending = true;
1013 /* save iamthif cb sent to amthi client */
1014 dev->iamthif_current_cb = cb_pos;
1015 list_move_tail(&cb_pos->list, &dev->write_waiting_list.list);
1016
1017 }
1018 } else if (*slots == dev->hbuf_depth) {
1019 /* buffer is still empty */
1020 mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0];
1021 mei_hdr->host_addr = cl->host_client_id;
1022 mei_hdr->me_addr = cl->me_client_id;
1023 mei_hdr->length =
1024 (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
1025 mei_hdr->msg_complete = 0;
1026 mei_hdr->reserved = 0;
1027
1028 *slots -= mei_data2slots(mei_hdr->length);
1029
1030 if (mei_write_message(dev, mei_hdr,
1031 (dev->iamthif_msg_buf +
1032 dev->iamthif_msg_buf_index),
1033 mei_hdr->length)) {
1034 cl->status = -ENODEV;
1035 list_del(&cb_pos->list);
1036 } else {
1037 dev->iamthif_msg_buf_index += mei_hdr->length;
1038 }
1039 return -EMSGSIZE;
1040 } else {
1041 return -EBADMSG;
1042 }
1043
1044 return 0;
1045}
1046
1047/**
1048 * mei_irq_thread_read_handler - bottom half read routine after ISR to 850 * mei_irq_thread_read_handler - bottom half read routine after ISR to
1049 * handle the read processing. 851 * handle the read processing.
1050 * 852 *
@@ -1117,8 +919,8 @@ static int mei_irq_thread_read_handler(struct mei_cl_cb *cmpl_list,
1117 dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n"); 919 dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n");
1118 dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n", 920 dev_dbg(&dev->pdev->dev, "mei_hdr->length =%d\n",
1119 mei_hdr->length); 921 mei_hdr->length);
1120 ret = mei_irq_thread_read_amthi_message(cmpl_list, 922
1121 dev, mei_hdr); 923 ret = mei_amthif_irq_read_message(cmpl_list, dev, mei_hdr);
1122 if (ret) 924 if (ret)
1123 goto end; 925 goto end;
1124 926
@@ -1195,7 +997,7 @@ static int mei_irq_thread_write_handler(struct mei_cl_cb *cmpl_list,
1195 if (cl == &dev->iamthif_cl) { 997 if (cl == &dev->iamthif_cl) {
1196 dev_dbg(&dev->pdev->dev, "check iamthif flow control.\n"); 998 dev_dbg(&dev->pdev->dev, "check iamthif flow control.\n");
1197 if (dev->iamthif_flow_control_pending) { 999 if (dev->iamthif_flow_control_pending) {
1198 ret = _mei_irq_thread_iamthif_read(dev, slots); 1000 ret = mei_amthif_irq_read(dev, slots);
1199 if (ret) 1001 if (ret)
1200 return ret; 1002 return ret;
1201 } 1003 }
@@ -1300,8 +1102,8 @@ static int mei_irq_thread_write_handler(struct mei_cl_cb *cmpl_list,
1300 cl->host_client_id); 1102 cl->host_client_id);
1301 continue; 1103 continue;
1302 } 1104 }
1303 ret = _mei_irq_thread_cmpl_iamthif(dev, slots, pos, 1105 ret = mei_amthif_irq_process_completed(dev, slots, pos,
1304 cl, cmpl_list); 1106 cl, cmpl_list);
1305 if (ret) 1107 if (ret)
1306 return ret; 1108 return ret;
1307 1109
@@ -1372,7 +1174,7 @@ void mei_timer(struct work_struct *work)
1372 dev->iamthif_current_cb = NULL; 1174 dev->iamthif_current_cb = NULL;
1373 1175
1374 dev->iamthif_file_object = NULL; 1176 dev->iamthif_file_object = NULL;
1375 mei_run_next_iamthif_cmd(dev); 1177 mei_amthif_run_next_cmd(dev);
1376 } 1178 }
1377 } 1179 }
1378 1180
@@ -1409,7 +1211,7 @@ void mei_timer(struct work_struct *work)
1409 dev->iamthif_file_object->private_data = NULL; 1211 dev->iamthif_file_object->private_data = NULL;
1410 dev->iamthif_file_object = NULL; 1212 dev->iamthif_file_object = NULL;
1411 dev->iamthif_timer = 0; 1213 dev->iamthif_timer = 0;
1412 mei_run_next_iamthif_cmd(dev); 1214 mei_amthif_run_next_cmd(dev);
1413 1215
1414 } 1216 }
1415 } 1217 }
@@ -1524,7 +1326,7 @@ end:
1524 _mei_cmpl(cl, cb_pos); 1326 _mei_cmpl(cl, cb_pos);
1525 cb_pos = NULL; 1327 cb_pos = NULL;
1526 } else if (cl == &dev->iamthif_cl) { 1328 } else if (cl == &dev->iamthif_cl) {
1527 _mei_cmpl_iamthif(dev, cb_pos); 1329 mei_amthif_complete(dev, cb_pos);
1528 } 1330 }
1529 } 1331 }
1530 } 1332 }
diff --git a/drivers/misc/mei/iorw.c b/drivers/misc/mei/iorw.c
index 8026cbf755db..a1d9ba1a06e7 100644
--- a/drivers/misc/mei/iorw.c
+++ b/drivers/misc/mei/iorw.c
@@ -320,152 +320,6 @@ end:
320} 320}
321 321
322/** 322/**
323 * find_amthi_read_list_entry - finds a amthilist entry for current file
324 *
325 * @dev: the device structure
326 * @file: pointer to file object
327 *
328 * returns returned a list entry on success, NULL on failure.
329 */
330struct mei_cl_cb *find_amthi_read_list_entry(
331 struct mei_device *dev,
332 struct file *file)
333{
334 struct mei_cl *cl_temp;
335 struct mei_cl_cb *pos = NULL;
336 struct mei_cl_cb *next = NULL;
337
338 list_for_each_entry_safe(pos, next,
339 &dev->amthi_read_complete_list.list, list) {
340 cl_temp = (struct mei_cl *)pos->file_private;
341 if (cl_temp && cl_temp == &dev->iamthif_cl &&
342 pos->file_object == file)
343 return pos;
344 }
345 return NULL;
346}
347
348/**
349 * amthi_read - read data from AMTHI client
350 *
351 * @dev: the device structure
352 * @if_num: minor number
353 * @file: pointer to file object
354 * @*ubuf: pointer to user data in user space
355 * @length: data length to read
356 * @offset: data read offset
357 *
358 * Locking: called under "dev->device_lock" lock
359 *
360 * returns
361 * returned data length on success,
362 * zero if no data to read,
363 * negative on failure.
364 */
365int amthi_read(struct mei_device *dev, struct file *file,
366 char __user *ubuf, size_t length, loff_t *offset)
367{
368 int rets;
369 int wait_ret;
370 struct mei_cl_cb *cb = NULL;
371 struct mei_cl *cl = file->private_data;
372 unsigned long timeout;
373 int i;
374
375 /* Only Posible if we are in timeout */
376 if (!cl || cl != &dev->iamthif_cl) {
377 dev_dbg(&dev->pdev->dev, "bad file ext.\n");
378 return -ETIMEDOUT;
379 }
380
381 i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id);
382
383 if (i < 0) {
384 dev_dbg(&dev->pdev->dev, "amthi client not found.\n");
385 return -ENODEV;
386 }
387 dev_dbg(&dev->pdev->dev, "checking amthi data\n");
388 cb = find_amthi_read_list_entry(dev, file);
389
390 /* Check for if we can block or not*/
391 if (cb == NULL && file->f_flags & O_NONBLOCK)
392 return -EAGAIN;
393
394
395 dev_dbg(&dev->pdev->dev, "waiting for amthi data\n");
396 while (cb == NULL) {
397 /* unlock the Mutex */
398 mutex_unlock(&dev->device_lock);
399
400 wait_ret = wait_event_interruptible(dev->iamthif_cl.wait,
401 (cb = find_amthi_read_list_entry(dev, file)));
402
403 if (wait_ret)
404 return -ERESTARTSYS;
405
406 dev_dbg(&dev->pdev->dev, "woke up from sleep\n");
407
408 /* Locking again the Mutex */
409 mutex_lock(&dev->device_lock);
410 }
411
412
413 dev_dbg(&dev->pdev->dev, "Got amthi data\n");
414 dev->iamthif_timer = 0;
415
416 if (cb) {
417 timeout = cb->read_time +
418 mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER);
419 dev_dbg(&dev->pdev->dev, "amthi timeout = %lud\n",
420 timeout);
421
422 if (time_after(jiffies, timeout)) {
423 dev_dbg(&dev->pdev->dev, "amthi Time out\n");
424 /* 15 sec for the message has expired */
425 list_del(&cb->list);
426 rets = -ETIMEDOUT;
427 goto free;
428 }
429 }
430 /* if the whole message will fit remove it from the list */
431 if (cb->buf_idx >= *offset && length >= (cb->buf_idx - *offset))
432 list_del(&cb->list);
433 else if (cb->buf_idx > 0 && cb->buf_idx <= *offset) {
434 /* end of the message has been reached */
435 list_del(&cb->list);
436 rets = 0;
437 goto free;
438 }
439 /* else means that not full buffer will be read and do not
440 * remove message from deletion list
441 */
442
443 dev_dbg(&dev->pdev->dev, "amthi cb->response_buffer size - %d\n",
444 cb->response_buffer.size);
445 dev_dbg(&dev->pdev->dev, "amthi cb->buf_idx - %lu\n", cb->buf_idx);
446
447 /* length is being turncated to PAGE_SIZE, however,
448 * the buf_idx may point beyond */
449 length = min_t(size_t, length, (cb->buf_idx - *offset));
450
451 if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length))
452 rets = -EFAULT;
453 else {
454 rets = length;
455 if ((*offset + length) < cb->buf_idx) {
456 *offset += length;
457 goto out;
458 }
459 }
460free:
461 dev_dbg(&dev->pdev->dev, "free amthi cb memory.\n");
462 *offset = 0;
463 mei_io_cb_free(cb);
464out:
465 return rets;
466}
467
468/**
469 * mei_start_read - the start read client message function. 323 * mei_start_read - the start read client message function.
470 * 324 *
471 * @dev: the device structure 325 * @dev: the device structure
@@ -524,123 +378,3 @@ err:
524 return rets; 378 return rets;
525} 379}
526 380
527/**
528 * amthi_write - write iamthif data to amthi client
529 *
530 * @dev: the device structure
531 * @cb: mei call back struct
532 *
533 * returns 0 on success, <0 on failure.
534 */
535int amthi_write(struct mei_device *dev, struct mei_cl_cb *cb)
536{
537 struct mei_msg_hdr mei_hdr;
538 int ret;
539
540 if (!dev || !cb)
541 return -ENODEV;
542
543 dev_dbg(&dev->pdev->dev, "write data to amthi client.\n");
544
545 dev->iamthif_state = MEI_IAMTHIF_WRITING;
546 dev->iamthif_current_cb = cb;
547 dev->iamthif_file_object = cb->file_object;
548 dev->iamthif_canceled = false;
549 dev->iamthif_ioctl = true;
550 dev->iamthif_msg_buf_size = cb->request_buffer.size;
551 memcpy(dev->iamthif_msg_buf, cb->request_buffer.data,
552 cb->request_buffer.size);
553
554 ret = mei_flow_ctrl_creds(dev, &dev->iamthif_cl);
555 if (ret < 0)
556 return ret;
557
558 if (ret && dev->mei_host_buffer_is_empty) {
559 ret = 0;
560 dev->mei_host_buffer_is_empty = false;
561 if (cb->request_buffer.size > mei_hbuf_max_data(dev)) {
562 mei_hdr.length = mei_hbuf_max_data(dev);
563 mei_hdr.msg_complete = 0;
564 } else {
565 mei_hdr.length = cb->request_buffer.size;
566 mei_hdr.msg_complete = 1;
567 }
568
569 mei_hdr.host_addr = dev->iamthif_cl.host_client_id;
570 mei_hdr.me_addr = dev->iamthif_cl.me_client_id;
571 mei_hdr.reserved = 0;
572 dev->iamthif_msg_buf_index += mei_hdr.length;
573 if (mei_write_message(dev, &mei_hdr,
574 (unsigned char *)(dev->iamthif_msg_buf),
575 mei_hdr.length))
576 return -ENODEV;
577
578 if (mei_hdr.msg_complete) {
579 if (mei_flow_ctrl_reduce(dev, &dev->iamthif_cl))
580 return -ENODEV;
581 dev->iamthif_flow_control_pending = true;
582 dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
583 dev_dbg(&dev->pdev->dev, "add amthi cb to write waiting list\n");
584 dev->iamthif_current_cb = cb;
585 dev->iamthif_file_object = cb->file_object;
586 list_add_tail(&cb->list, &dev->write_waiting_list.list);
587 } else {
588 dev_dbg(&dev->pdev->dev, "message does not complete, "
589 "so add amthi cb to write list.\n");
590 list_add_tail(&cb->list, &dev->write_list.list);
591 }
592 } else {
593 if (!(dev->mei_host_buffer_is_empty))
594 dev_dbg(&dev->pdev->dev, "host buffer is not empty");
595
596 dev_dbg(&dev->pdev->dev, "No flow control credentials, "
597 "so add iamthif cb to write list.\n");
598 list_add_tail(&cb->list, &dev->write_list.list);
599 }
600 return 0;
601}
602
603/**
604 * iamthif_ioctl_send_msg - send cmd data to amthi client
605 *
606 * @dev: the device structure
607 *
608 * returns 0 on success, <0 on failure.
609 */
610void mei_run_next_iamthif_cmd(struct mei_device *dev)
611{
612 struct mei_cl *cl_tmp;
613 struct mei_cl_cb *pos = NULL;
614 struct mei_cl_cb *next = NULL;
615 int status;
616
617 if (!dev)
618 return;
619
620 dev->iamthif_msg_buf_size = 0;
621 dev->iamthif_msg_buf_index = 0;
622 dev->iamthif_canceled = false;
623 dev->iamthif_ioctl = true;
624 dev->iamthif_state = MEI_IAMTHIF_IDLE;
625 dev->iamthif_timer = 0;
626 dev->iamthif_file_object = NULL;
627
628 dev_dbg(&dev->pdev->dev, "complete amthi cmd_list cb.\n");
629
630 list_for_each_entry_safe(pos, next, &dev->amthi_cmd_list.list, list) {
631 list_del(&pos->list);
632 cl_tmp = (struct mei_cl *)pos->file_private;
633
634 if (cl_tmp && cl_tmp == &dev->iamthif_cl) {
635 status = amthi_write(dev, pos);
636 if (status) {
637 dev_dbg(&dev->pdev->dev,
638 "amthi write failed status = %d\n",
639 status);
640 return;
641 }
642 break;
643 }
644 }
645}
646
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 659727a79012..f69e0856f982 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -349,7 +349,7 @@ static int mei_release(struct inode *inode, struct file *file)
349 dev->iamthif_canceled = true; 349 dev->iamthif_canceled = true;
350 if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) { 350 if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) {
351 dev_dbg(&dev->pdev->dev, "run next amthi iamthif cb\n"); 351 dev_dbg(&dev->pdev->dev, "run next amthi iamthif cb\n");
352 mei_run_next_iamthif_cmd(dev); 352 mei_amthif_run_next_cmd(dev);
353 } 353 }
354 } 354 }
355 355
@@ -410,7 +410,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
410 } 410 }
411 411
412 if (cl == &dev->iamthif_cl) { 412 if (cl == &dev->iamthif_cl) {
413 rets = amthi_read(dev, file, ubuf, length, offset); 413 rets = mei_amthif_read(dev, file, ubuf, length, offset);
414 goto out; 414 goto out;
415 } 415 }
416 416
@@ -563,7 +563,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
563 goto err; 563 goto err;
564 } 564 }
565 if (cl == &dev->iamthif_cl) { 565 if (cl == &dev->iamthif_cl) {
566 write_cb = find_amthi_read_list_entry(dev, file); 566 write_cb = mei_amthif_find_read_list_entry(dev, file);
567 567
568 if (write_cb) { 568 if (write_cb) {
569 timeout = write_cb->read_time + 569 timeout = write_cb->read_time +
@@ -636,7 +636,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
636 list_add_tail(&write_cb->list, &dev->amthi_cmd_list.list); 636 list_add_tail(&write_cb->list, &dev->amthi_cmd_list.list);
637 } else { 637 } else {
638 dev_dbg(&dev->pdev->dev, "call amthi write\n"); 638 dev_dbg(&dev->pdev->dev, "call amthi write\n");
639 rets = amthi_write(dev, write_cb); 639 rets = mei_amthif_write(dev, write_cb);
640 640
641 if (rets) { 641 if (rets) {
642 dev_err(&dev->pdev->dev, "amthi write failed with status = %d\n", 642 dev_err(&dev->pdev->dev, "amthi write failed with status = %d\n",
@@ -823,7 +823,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
823 dev->iamthif_file_object == file) { 823 dev->iamthif_file_object == file) {
824 mask |= (POLLIN | POLLRDNORM); 824 mask |= (POLLIN | POLLRDNORM);
825 dev_dbg(&dev->pdev->dev, "run next amthi cb\n"); 825 dev_dbg(&dev->pdev->dev, "run next amthi cb\n");
826 mei_run_next_iamthif_cmd(dev); 826 mei_amthif_run_next_cmd(dev);
827 } 827 }
828 goto out; 828 goto out;
829 } 829 }
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 32c951ab1221..57a5a4e4ee4d 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -286,7 +286,6 @@ int mei_task_initialize_clients(void *data);
286int mei_initialize_clients(struct mei_device *dev); 286int mei_initialize_clients(struct mei_device *dev);
287int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl); 287int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl);
288void mei_remove_client_from_file_list(struct mei_device *dev, u8 host_client_id); 288void mei_remove_client_from_file_list(struct mei_device *dev, u8 host_client_id);
289void mei_host_init_iamthif(struct mei_device *dev);
290void mei_allocate_me_clients_storage(struct mei_device *dev); 289void mei_allocate_me_clients_storage(struct mei_device *dev);
291 290
292 291
@@ -362,17 +361,37 @@ int mei_ioctl_connect_client(struct file *file,
362 361
363int mei_start_read(struct mei_device *dev, struct mei_cl *cl); 362int mei_start_read(struct mei_device *dev, struct mei_cl *cl);
364 363
365int amthi_write(struct mei_device *dev, struct mei_cl_cb *priv_cb);
366 364
367int amthi_read(struct mei_device *dev, struct file *file, 365/*
366 * AMTHIF - AMT Host Interface Functions
367 */
368void mei_amthif_reset_params(struct mei_device *dev);
369
370void mei_amthif_host_init(struct mei_device *dev);
371
372int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *priv_cb);
373
374int mei_amthif_read(struct mei_device *dev, struct file *file,
368 char __user *ubuf, size_t length, loff_t *offset); 375 char __user *ubuf, size_t length, loff_t *offset);
369 376
370struct mei_cl_cb *find_amthi_read_list_entry(struct mei_device *dev, 377struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
371 struct file *file); 378 struct file *file);
372 379
373void mei_run_next_iamthif_cmd(struct mei_device *dev); 380void mei_amthif_run_next_cmd(struct mei_device *dev);
381
382
383int mei_amthif_read_message(struct mei_cl_cb *complete_list,
384 struct mei_device *dev, struct mei_msg_hdr *mei_hdr);
374 385
386int mei_amthif_irq_process_completed(struct mei_device *dev, s32 *slots,
387 struct mei_cl_cb *cb_pos,
388 struct mei_cl *cl,
389 struct mei_cl_cb *cmpl_list);
375 390
391void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb);
392int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list,
393 struct mei_device *dev, struct mei_msg_hdr *mei_hdr);
394int mei_amthif_irq_read(struct mei_device *dev, s32 *slots);
376 395
377/* 396/*
378 * Register Access Function 397 * Register Access Function
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-18 13:57:29 -0500