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interface.h
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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 
18 
19 #ifndef _MEI_INTERFACE_H_
20 #define _MEI_INTERFACE_H_
21 
22 #include <linux/mei.h>
23 #include "mei_dev.h"
24 
25 
26 
27 void mei_read_slots(struct mei_device *dev,
28  unsigned char *buffer,
29  unsigned long buffer_length);
30 
31 int mei_write_message(struct mei_device *dev,
32  struct mei_msg_hdr *header,
33  unsigned char *write_buffer,
34  unsigned long write_length);
35 
36 bool mei_hbuf_is_empty(struct mei_device *dev);
37 
39 
40 static inline size_t mei_hbuf_max_data(const struct mei_device *dev)
41 {
42  return dev->hbuf_depth * sizeof(u32) - sizeof(struct mei_msg_hdr);
43 }
44 
45 /* get slots (dwords) from a message length + header (bytes) */
46 static inline unsigned char mei_data2slots(size_t length)
47 {
48  return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4);
49 }
50 
51 int mei_count_full_read_slots(struct mei_device *dev);
52 
53 
54 int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl);
55 
56 
57 
58 int mei_wd_send(struct mei_device *dev);
59 int mei_wd_stop(struct mei_device *dev);
60 int mei_wd_host_init(struct mei_device *dev);
61 /*
62  * mei_watchdog_register - Registering watchdog interface
63  * once we got connection to the WD Client
64  * @dev - mei device
65  */
66 void mei_watchdog_register(struct mei_device *dev);
67 /*
68  * mei_watchdog_unregister - Unregistering watchdog interface
69  * @dev - mei device
70  */
71 void mei_watchdog_unregister(struct mei_device *dev);
72 
73 int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl);
74 
75 int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl);
76 
77 int mei_disconnect(struct mei_device *dev, struct mei_cl *cl);
78 int mei_other_client_is_connecting(struct mei_device *dev, struct mei_cl *cl);
79 int mei_connect(struct mei_device *dev, struct mei_cl *cl);
80 
81 #endif /* _MEI_INTERFACE_H_ */