3 * Intel Management Engine Interface (Intel MEI) Linux driver
4 * Copyright (c) 2003-2012, Intel Corporation.
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.
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
17 #include <linux/pci.h>
18 #include <linux/sched.h>
19 #include <linux/wait.h>
20 #include <linux/delay.h>
24 #include "interface.h"
25 #include <linux/mei.h>
27 const uuid_le mei_amthi_guid
= UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, 0xac,
28 0xa8, 0x46, 0xe0, 0xff, 0x65,
32 * mei_io_list_init - Sets up a queue list.
34 * @list: An instance io list structure
35 * @dev: the device structure
37 void mei_io_list_init(struct mei_io_list
*list
)
39 /* initialize our queue list */
40 INIT_LIST_HEAD(&list
->mei_cb
.cb_list
);
44 * mei_io_list_flush - removes list entry belonging to cl.
46 * @list: An instance of our list structure
47 * @cl: private data of the file object
49 void mei_io_list_flush(struct mei_io_list
*list
, struct mei_cl
*cl
)
51 struct mei_cl_cb
*pos
;
52 struct mei_cl_cb
*next
;
54 list_for_each_entry_safe(pos
, next
, &list
->mei_cb
.cb_list
, cb_list
) {
55 if (pos
->file_private
) {
56 struct mei_cl
*cl_tmp
;
57 cl_tmp
= (struct mei_cl
*)pos
->file_private
;
58 if (mei_cl_cmp_id(cl
, cl_tmp
))
59 list_del(&pos
->cb_list
);
64 * mei_cl_flush_queues - flushes queue lists belonging to cl.
66 * @dev: the device structure
67 * @cl: private data of the file object
69 int mei_cl_flush_queues(struct mei_cl
*cl
)
74 dev_dbg(&cl
->dev
->pdev
->dev
, "remove list entry belonging to cl\n");
75 mei_io_list_flush(&cl
->dev
->read_list
, cl
);
76 mei_io_list_flush(&cl
->dev
->write_list
, cl
);
77 mei_io_list_flush(&cl
->dev
->write_waiting_list
, cl
);
78 mei_io_list_flush(&cl
->dev
->ctrl_wr_list
, cl
);
79 mei_io_list_flush(&cl
->dev
->ctrl_rd_list
, cl
);
80 mei_io_list_flush(&cl
->dev
->amthi_cmd_list
, cl
);
81 mei_io_list_flush(&cl
->dev
->amthi_read_complete_list
, cl
);
88 * mei_reset_iamthif_params - initializes mei device iamthif
90 * @dev: the device structure
92 static void mei_reset_iamthif_params(struct mei_device
*dev
)
94 /* reset iamthif parameters. */
95 dev
->iamthif_current_cb
= NULL
;
96 dev
->iamthif_msg_buf_size
= 0;
97 dev
->iamthif_msg_buf_index
= 0;
98 dev
->iamthif_canceled
= false;
99 dev
->iamthif_ioctl
= false;
100 dev
->iamthif_state
= MEI_IAMTHIF_IDLE
;
101 dev
->iamthif_timer
= 0;
105 * init_mei_device - allocates and initializes the mei device structure
107 * @pdev: The pci device structure
109 * returns The mei_device_device pointer on success, NULL on failure.
111 struct mei_device
*mei_device_init(struct pci_dev
*pdev
)
113 struct mei_device
*dev
;
115 dev
= kzalloc(sizeof(struct mei_device
), GFP_KERNEL
);
119 /* setup our list array */
120 INIT_LIST_HEAD(&dev
->file_list
);
121 INIT_LIST_HEAD(&dev
->wd_cl
.link
);
122 INIT_LIST_HEAD(&dev
->iamthif_cl
.link
);
123 mutex_init(&dev
->device_lock
);
124 init_waitqueue_head(&dev
->wait_recvd_msg
);
125 init_waitqueue_head(&dev
->wait_stop_wd
);
126 dev
->mei_state
= MEI_INITIALIZING
;
127 dev
->iamthif_state
= MEI_IAMTHIF_IDLE
;
128 dev
->wd_interface_reg
= false;
131 mei_io_list_init(&dev
->read_list
);
132 mei_io_list_init(&dev
->write_list
);
133 mei_io_list_init(&dev
->write_waiting_list
);
134 mei_io_list_init(&dev
->ctrl_wr_list
);
135 mei_io_list_init(&dev
->ctrl_rd_list
);
136 mei_io_list_init(&dev
->amthi_cmd_list
);
137 mei_io_list_init(&dev
->amthi_read_complete_list
);
143 * mei_hw_init - initializes host and fw to start work.
145 * @dev: the device structure
147 * returns 0 on success, <0 on failure.
149 int mei_hw_init(struct mei_device
*dev
)
154 mutex_lock(&dev
->device_lock
);
156 dev
->host_hw_state
= mei_hcsr_read(dev
);
157 dev
->me_hw_state
= mei_mecsr_read(dev
);
158 dev_dbg(&dev
->pdev
->dev
, "host_hw_state = 0x%08x, mestate = 0x%08x.\n",
159 dev
->host_hw_state
, dev
->me_hw_state
);
161 /* acknowledge interrupt and stop interupts */
162 if ((dev
->host_hw_state
& H_IS
) == H_IS
)
163 mei_reg_write(dev
, H_CSR
, dev
->host_hw_state
);
165 /* Doesn't change in runtime */
166 dev
->hbuf_depth
= (dev
->host_hw_state
& H_CBD
) >> 24;
168 dev
->recvd_msg
= false;
169 dev_dbg(&dev
->pdev
->dev
, "reset in start the mei device.\n");
173 dev_dbg(&dev
->pdev
->dev
, "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
174 dev
->host_hw_state
, dev
->me_hw_state
);
176 /* wait for ME to turn on ME_RDY */
177 if (!dev
->recvd_msg
) {
178 mutex_unlock(&dev
->device_lock
);
179 err
= wait_event_interruptible_timeout(dev
->wait_recvd_msg
,
180 dev
->recvd_msg
, MEI_INTEROP_TIMEOUT
);
181 mutex_lock(&dev
->device_lock
);
184 if (err
<= 0 && !dev
->recvd_msg
) {
185 dev
->mei_state
= MEI_DISABLED
;
186 dev_dbg(&dev
->pdev
->dev
,
187 "wait_event_interruptible_timeout failed"
188 "on wait for ME to turn on ME_RDY.\n");
193 if (!(((dev
->host_hw_state
& H_RDY
) == H_RDY
) &&
194 ((dev
->me_hw_state
& ME_RDY_HRA
) == ME_RDY_HRA
))) {
195 dev
->mei_state
= MEI_DISABLED
;
196 dev_dbg(&dev
->pdev
->dev
,
197 "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
198 dev
->host_hw_state
, dev
->me_hw_state
);
200 if (!(dev
->host_hw_state
& H_RDY
))
201 dev_dbg(&dev
->pdev
->dev
, "host turn off H_RDY.\n");
203 if (!(dev
->me_hw_state
& ME_RDY_HRA
))
204 dev_dbg(&dev
->pdev
->dev
, "ME turn off ME_RDY.\n");
206 dev_err(&dev
->pdev
->dev
, "link layer initialization failed.\n");
211 if (dev
->version
.major_version
!= HBM_MAJOR_VERSION
||
212 dev
->version
.minor_version
!= HBM_MINOR_VERSION
) {
213 dev_dbg(&dev
->pdev
->dev
, "MEI start failed.\n");
218 dev
->recvd_msg
= false;
219 dev_dbg(&dev
->pdev
->dev
, "host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
220 dev
->host_hw_state
, dev
->me_hw_state
);
221 dev_dbg(&dev
->pdev
->dev
, "ME turn on ME_RDY and host turn on H_RDY.\n");
222 dev_dbg(&dev
->pdev
->dev
, "link layer has been established.\n");
223 dev_dbg(&dev
->pdev
->dev
, "MEI start success.\n");
227 mutex_unlock(&dev
->device_lock
);
232 * mei_hw_reset - resets fw via mei csr register.
234 * @dev: the device structure
235 * @interrupts_enabled: if interrupt should be enabled after reset.
237 static void mei_hw_reset(struct mei_device
*dev
, int interrupts_enabled
)
239 dev
->host_hw_state
|= (H_RST
| H_IG
);
241 if (interrupts_enabled
)
242 mei_enable_interrupts(dev
);
244 mei_disable_interrupts(dev
);
248 * mei_reset - resets host and fw.
250 * @dev: the device structure
251 * @interrupts_enabled: if interrupt should be enabled after reset.
253 void mei_reset(struct mei_device
*dev
, int interrupts_enabled
)
255 struct mei_cl
*cl_pos
= NULL
;
256 struct mei_cl
*cl_next
= NULL
;
257 struct mei_cl_cb
*cb_pos
= NULL
;
258 struct mei_cl_cb
*cb_next
= NULL
;
261 if (dev
->mei_state
== MEI_RECOVERING_FROM_RESET
) {
262 dev
->need_reset
= true;
266 unexpected
= (dev
->mei_state
!= MEI_INITIALIZING
&&
267 dev
->mei_state
!= MEI_DISABLED
&&
268 dev
->mei_state
!= MEI_POWER_DOWN
&&
269 dev
->mei_state
!= MEI_POWER_UP
);
271 dev
->host_hw_state
= mei_hcsr_read(dev
);
273 dev_dbg(&dev
->pdev
->dev
, "before reset host_hw_state = 0x%08x.\n",
276 mei_hw_reset(dev
, interrupts_enabled
);
278 dev
->host_hw_state
&= ~H_RST
;
279 dev
->host_hw_state
|= H_IG
;
283 dev_dbg(&dev
->pdev
->dev
, "currently saved host_hw_state = 0x%08x.\n",
286 dev
->need_reset
= false;
288 if (dev
->mei_state
!= MEI_INITIALIZING
) {
289 if (dev
->mei_state
!= MEI_DISABLED
&&
290 dev
->mei_state
!= MEI_POWER_DOWN
)
291 dev
->mei_state
= MEI_RESETING
;
293 list_for_each_entry_safe(cl_pos
,
294 cl_next
, &dev
->file_list
, link
) {
295 cl_pos
->state
= MEI_FILE_DISCONNECTED
;
296 cl_pos
->mei_flow_ctrl_creds
= 0;
297 cl_pos
->read_cb
= NULL
;
298 cl_pos
->timer_count
= 0;
300 /* remove entry if already in list */
301 dev_dbg(&dev
->pdev
->dev
, "list del iamthif and wd file list.\n");
302 mei_remove_client_from_file_list(dev
,
303 dev
->wd_cl
.host_client_id
);
305 mei_remove_client_from_file_list(dev
,
306 dev
->iamthif_cl
.host_client_id
);
308 mei_reset_iamthif_params(dev
);
309 dev
->extra_write_index
= 0;
312 dev
->me_clients_num
= 0;
315 dev
->wd_pending
= false;
317 /* update the state of the registers after reset */
318 dev
->host_hw_state
= mei_hcsr_read(dev
);
319 dev
->me_hw_state
= mei_mecsr_read(dev
);
321 dev_dbg(&dev
->pdev
->dev
, "after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
322 dev
->host_hw_state
, dev
->me_hw_state
);
325 dev_warn(&dev
->pdev
->dev
, "unexpected reset.\n");
327 /* Wake up all readings so they can be interrupted */
328 list_for_each_entry_safe(cl_pos
, cl_next
, &dev
->file_list
, link
) {
329 if (waitqueue_active(&cl_pos
->rx_wait
)) {
330 dev_dbg(&dev
->pdev
->dev
, "Waking up client!\n");
331 wake_up_interruptible(&cl_pos
->rx_wait
);
334 /* remove all waiting requests */
335 list_for_each_entry_safe(cb_pos
, cb_next
,
336 &dev
->write_list
.mei_cb
.cb_list
, cb_list
) {
337 list_del(&cb_pos
->cb_list
);
338 mei_free_cb_private(cb_pos
);
345 * host_start_message - mei host sends start message.
347 * @dev: the device structure
351 void mei_host_start_message(struct mei_device
*dev
)
353 struct mei_msg_hdr
*mei_hdr
;
354 struct hbm_host_version_request
*host_start_req
;
356 /* host start message */
357 mei_hdr
= (struct mei_msg_hdr
*) &dev
->wr_msg_buf
[0];
358 mei_hdr
->host_addr
= 0;
359 mei_hdr
->me_addr
= 0;
360 mei_hdr
->length
= sizeof(struct hbm_host_version_request
);
361 mei_hdr
->msg_complete
= 1;
362 mei_hdr
->reserved
= 0;
365 (struct hbm_host_version_request
*) &dev
->wr_msg_buf
[1];
366 memset(host_start_req
, 0, sizeof(struct hbm_host_version_request
));
367 host_start_req
->hbm_cmd
= HOST_START_REQ_CMD
;
368 host_start_req
->host_version
.major_version
= HBM_MAJOR_VERSION
;
369 host_start_req
->host_version
.minor_version
= HBM_MINOR_VERSION
;
370 dev
->recvd_msg
= false;
371 if (mei_write_message(dev
, mei_hdr
, (unsigned char *)host_start_req
,
373 dev_dbg(&dev
->pdev
->dev
, "write send version message to FW fail.\n");
374 dev
->mei_state
= MEI_RESETING
;
377 dev
->init_clients_state
= MEI_START_MESSAGE
;
378 dev
->init_clients_timer
= INIT_CLIENTS_TIMEOUT
;
383 * host_enum_clients_message - host sends enumeration client request message.
385 * @dev: the device structure
389 void mei_host_enum_clients_message(struct mei_device
*dev
)
391 struct mei_msg_hdr
*mei_hdr
;
392 struct hbm_host_enum_request
*host_enum_req
;
393 mei_hdr
= (struct mei_msg_hdr
*) &dev
->wr_msg_buf
[0];
394 /* enumerate clients */
395 mei_hdr
->host_addr
= 0;
396 mei_hdr
->me_addr
= 0;
397 mei_hdr
->length
= sizeof(struct hbm_host_enum_request
);
398 mei_hdr
->msg_complete
= 1;
399 mei_hdr
->reserved
= 0;
401 host_enum_req
= (struct hbm_host_enum_request
*) &dev
->wr_msg_buf
[1];
402 memset(host_enum_req
, 0, sizeof(struct hbm_host_enum_request
));
403 host_enum_req
->hbm_cmd
= HOST_ENUM_REQ_CMD
;
404 if (mei_write_message(dev
, mei_hdr
, (unsigned char *)host_enum_req
,
406 dev
->mei_state
= MEI_RESETING
;
407 dev_dbg(&dev
->pdev
->dev
, "write send enumeration request message to FW fail.\n");
410 dev
->init_clients_state
= MEI_ENUM_CLIENTS_MESSAGE
;
411 dev
->init_clients_timer
= INIT_CLIENTS_TIMEOUT
;
417 * allocate_me_clients_storage - allocates storage for me clients
419 * @dev: the device structure
423 void mei_allocate_me_clients_storage(struct mei_device
*dev
)
425 struct mei_me_client
*clients
;
428 /* count how many ME clients we have */
429 for_each_set_bit(b
, dev
->me_clients_map
, MEI_CLIENTS_MAX
)
430 dev
->me_clients_num
++;
432 if (dev
->me_clients_num
<= 0)
436 if (dev
->me_clients
!= NULL
) {
437 kfree(dev
->me_clients
);
438 dev
->me_clients
= NULL
;
440 dev_dbg(&dev
->pdev
->dev
, "memory allocation for ME clients size=%zd.\n",
441 dev
->me_clients_num
* sizeof(struct mei_me_client
));
442 /* allocate storage for ME clients representation */
443 clients
= kcalloc(dev
->me_clients_num
,
444 sizeof(struct mei_me_client
), GFP_KERNEL
);
446 dev_dbg(&dev
->pdev
->dev
, "memory allocation for ME clients failed.\n");
447 dev
->mei_state
= MEI_RESETING
;
451 dev
->me_clients
= clients
;
455 * host_client_properties - reads properties for client
457 * @dev: the device structure
461 * = 0 - no more clients.
462 * = 1 - still have clients to send properties request.
464 int mei_host_client_properties(struct mei_device
*dev
)
466 struct mei_msg_hdr
*mei_header
;
467 struct hbm_props_request
*host_cli_req
;
469 u8 client_num
= dev
->me_client_presentation_num
;
471 b
= dev
->me_client_index
;
472 b
= find_next_bit(dev
->me_clients_map
, MEI_CLIENTS_MAX
, b
);
473 if (b
< MEI_CLIENTS_MAX
) {
474 dev
->me_clients
[client_num
].client_id
= b
;
475 dev
->me_clients
[client_num
].mei_flow_ctrl_creds
= 0;
476 mei_header
= (struct mei_msg_hdr
*)&dev
->wr_msg_buf
[0];
477 mei_header
->host_addr
= 0;
478 mei_header
->me_addr
= 0;
479 mei_header
->length
= sizeof(struct hbm_props_request
);
480 mei_header
->msg_complete
= 1;
481 mei_header
->reserved
= 0;
483 host_cli_req
= (struct hbm_props_request
*)&dev
->wr_msg_buf
[1];
485 memset(host_cli_req
, 0, sizeof(struct hbm_props_request
));
487 host_cli_req
->hbm_cmd
= HOST_CLIENT_PROPERTIES_REQ_CMD
;
488 host_cli_req
->address
= b
;
490 if (mei_write_message(dev
, mei_header
,
491 (unsigned char *)host_cli_req
,
492 mei_header
->length
)) {
493 dev
->mei_state
= MEI_RESETING
;
494 dev_dbg(&dev
->pdev
->dev
, "write send enumeration request message to FW fail.\n");
499 dev
->init_clients_timer
= INIT_CLIENTS_TIMEOUT
;
500 dev
->me_client_index
= b
;
508 * mei_init_file_private - initializes private file structure.
510 * @priv: private file structure to be initialized
511 * @file: the file structure
513 void mei_cl_init(struct mei_cl
*priv
, struct mei_device
*dev
)
515 memset(priv
, 0, sizeof(struct mei_cl
));
516 init_waitqueue_head(&priv
->wait
);
517 init_waitqueue_head(&priv
->rx_wait
);
518 init_waitqueue_head(&priv
->tx_wait
);
519 INIT_LIST_HEAD(&priv
->link
);
520 priv
->reading_state
= MEI_IDLE
;
521 priv
->writing_state
= MEI_IDLE
;
525 int mei_find_me_client_index(const struct mei_device
*dev
, uuid_le cuuid
)
529 for (i
= 0; i
< dev
->me_clients_num
; ++i
)
530 if (uuid_le_cmp(cuuid
,
531 dev
->me_clients
[i
].props
.protocol_name
) == 0) {
541 * mei_find_me_client_update_filext - searches for ME client guid
542 * sets client_id in mei_file_private if found
543 * @dev: the device structure
544 * @priv: private file structure to set client_id in
545 * @cguid: searched guid of ME client
546 * @client_id: id of host client to be set in file private structure
548 * returns ME client index
550 u8
mei_find_me_client_update_filext(struct mei_device
*dev
, struct mei_cl
*priv
,
551 const uuid_le
*cguid
, u8 client_id
)
555 if (!dev
|| !priv
|| !cguid
)
558 /* check for valid client id */
559 i
= mei_find_me_client_index(dev
, *cguid
);
561 priv
->me_client_id
= dev
->me_clients
[i
].client_id
;
562 priv
->state
= MEI_FILE_CONNECTING
;
563 priv
->host_client_id
= client_id
;
565 list_add_tail(&priv
->link
, &dev
->file_list
);
573 * host_init_iamthif - mei initialization iamthif client.
575 * @dev: the device structure
578 void mei_host_init_iamthif(struct mei_device
*dev
)
581 unsigned char *msg_buf
;
583 mei_cl_init(&dev
->iamthif_cl
, dev
);
584 dev
->iamthif_cl
.state
= MEI_FILE_DISCONNECTED
;
586 /* find ME amthi client */
587 i
= mei_find_me_client_update_filext(dev
, &dev
->iamthif_cl
,
588 &mei_amthi_guid
, MEI_IAMTHIF_HOST_CLIENT_ID
);
589 if (dev
->iamthif_cl
.state
!= MEI_FILE_CONNECTING
) {
590 dev_dbg(&dev
->pdev
->dev
, "failed to find iamthif client.\n");
594 /* Assign iamthif_mtu to the value received from ME */
596 dev
->iamthif_mtu
= dev
->me_clients
[i
].props
.max_msg_length
;
597 dev_dbg(&dev
->pdev
->dev
, "IAMTHIF_MTU = %d\n",
598 dev
->me_clients
[i
].props
.max_msg_length
);
600 kfree(dev
->iamthif_msg_buf
);
601 dev
->iamthif_msg_buf
= NULL
;
603 /* allocate storage for ME message buffer */
604 msg_buf
= kcalloc(dev
->iamthif_mtu
,
605 sizeof(unsigned char), GFP_KERNEL
);
607 dev_dbg(&dev
->pdev
->dev
, "memory allocation for ME message buffer failed.\n");
611 dev
->iamthif_msg_buf
= msg_buf
;
613 if (mei_connect(dev
, &dev
->iamthif_cl
)) {
614 dev_dbg(&dev
->pdev
->dev
, "Failed to connect to AMTHI client\n");
615 dev
->iamthif_cl
.state
= MEI_FILE_DISCONNECTED
;
616 dev
->iamthif_cl
.host_client_id
= 0;
618 dev
->iamthif_cl
.timer_count
= CONNECT_TIMEOUT
;
623 * mei_alloc_file_private - allocates a private file structure and sets it up.
624 * @file: the file structure
626 * returns The allocated file or NULL on failure
628 struct mei_cl
*mei_cl_allocate(struct mei_device
*dev
)
632 cl
= kmalloc(sizeof(struct mei_cl
), GFP_KERNEL
);
636 mei_cl_init(cl
, dev
);
644 * mei_disconnect_host_client - sends disconnect message to fw from host client.
646 * @dev: the device structure
647 * @cl: private data of the file object
649 * Locking: called under "dev->device_lock" lock
651 * returns 0 on success, <0 on failure.
653 int mei_disconnect_host_client(struct mei_device
*dev
, struct mei_cl
*cl
)
656 long timeout
= 15; /* 15 seconds */
657 struct mei_cl_cb
*cb
;
662 if (cl
->state
!= MEI_FILE_DISCONNECTING
)
665 cb
= kzalloc(sizeof(struct mei_cl_cb
), GFP_KERNEL
);
669 INIT_LIST_HEAD(&cb
->cb_list
);
670 cb
->file_private
= cl
;
671 cb
->major_file_operations
= MEI_CLOSE
;
672 if (dev
->mei_host_buffer_is_empty
) {
673 dev
->mei_host_buffer_is_empty
= false;
674 if (mei_disconnect(dev
, cl
)) {
676 dev_dbg(&dev
->pdev
->dev
, "failed to call mei_disconnect.\n");
679 mdelay(10); /* Wait for hardware disconnection ready */
680 list_add_tail(&cb
->cb_list
, &dev
->ctrl_rd_list
.mei_cb
.cb_list
);
682 dev_dbg(&dev
->pdev
->dev
, "add disconnect cb to control write list\n");
683 list_add_tail(&cb
->cb_list
,
684 &dev
->ctrl_wr_list
.mei_cb
.cb_list
);
686 mutex_unlock(&dev
->device_lock
);
688 err
= wait_event_timeout(dev
->wait_recvd_msg
,
689 (MEI_FILE_DISCONNECTED
== cl
->state
),
692 mutex_lock(&dev
->device_lock
);
693 if (MEI_FILE_DISCONNECTED
== cl
->state
) {
695 dev_dbg(&dev
->pdev
->dev
, "successfully disconnected from FW client.\n");
698 if (MEI_FILE_DISCONNECTED
!= cl
->state
)
699 dev_dbg(&dev
->pdev
->dev
, "wrong status client disconnect.\n");
702 dev_dbg(&dev
->pdev
->dev
,
703 "wait failed disconnect err=%08x\n",
706 dev_dbg(&dev
->pdev
->dev
, "failed to disconnect from FW client.\n");
709 mei_io_list_flush(&dev
->ctrl_rd_list
, cl
);
710 mei_io_list_flush(&dev
->ctrl_wr_list
, cl
);
712 mei_free_cb_private(cb
);
717 * mei_remove_client_from_file_list -
718 * removes file private data from device file list
720 * @dev: the device structure
721 * @host_client_id: host client id to be removed
723 void mei_remove_client_from_file_list(struct mei_device
*dev
,
726 struct mei_cl
*cl_pos
= NULL
;
727 struct mei_cl
*cl_next
= NULL
;
728 list_for_each_entry_safe(cl_pos
, cl_next
, &dev
->file_list
, link
) {
729 if (host_client_id
== cl_pos
->host_client_id
) {
730 dev_dbg(&dev
->pdev
->dev
, "remove host client = %d, ME client = %d\n",
731 cl_pos
->host_client_id
,
732 cl_pos
->me_client_id
);
733 list_del_init(&cl_pos
->link
);