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
19 #ifndef _MEI_INTERFACE_H_
20 #define _MEI_INTERFACE_H_
22 #include <linux/mei.h>
26 #define AMT_WD_DEFAULT_TIMEOUT 120 /* seconds */
27 #define AMT_WD_MIN_TIMEOUT 120 /* seconds */
28 #define AMT_WD_MAX_TIMEOUT 65535 /* seconds */
30 #define MEI_WATCHDOG_DATA_SIZE 16
31 #define MEI_START_WD_DATA_SIZE 20
32 #define MEI_WD_PARAMS_SIZE 4
35 void mei_read_slots(struct mei_device
*dev
,
36 unsigned char *buffer
,
37 unsigned long buffer_length
);
39 int mei_write_message(struct mei_device
*dev
,
40 struct mei_msg_hdr
*header
,
41 unsigned char *write_buffer
,
42 unsigned long write_length
);
44 bool mei_hbuf_is_empty(struct mei_device
*dev
);
46 int mei_hbuf_empty_slots(struct mei_device
*dev
);
48 static inline size_t mei_hbuf_max_data(const struct mei_device
*dev
)
50 return dev
->hbuf_depth
* sizeof(u32
) - sizeof(struct mei_msg_hdr
);
53 /* get slots (dwords) from a message length + header (bytes) */
54 static inline unsigned char mei_data2slots(size_t length
)
56 return DIV_ROUND_UP(sizeof(struct mei_msg_hdr
) + length
, 4);
59 int mei_count_full_read_slots(struct mei_device
*dev
);
62 int mei_flow_ctrl_creds(struct mei_device
*dev
, struct mei_cl
*cl
);
66 int mei_wd_send(struct mei_device
*dev
);
67 int mei_wd_stop(struct mei_device
*dev
, bool preserve
);
68 int mei_wd_host_init(struct mei_device
*dev
);
70 * mei_watchdog_register - Registering watchdog interface
71 * once we got connection to the WD Client
74 void mei_watchdog_register(struct mei_device
*dev
);
76 * mei_watchdog_unregister - Unregistering watchdog interface
79 void mei_watchdog_unregister(struct mei_device
*dev
);
81 int mei_flow_ctrl_reduce(struct mei_device
*dev
, struct mei_cl
*cl
);
83 int mei_send_flow_control(struct mei_device
*dev
, struct mei_cl
*cl
);
85 int mei_disconnect(struct mei_device
*dev
, struct mei_cl
*cl
);
86 int mei_other_client_is_connecting(struct mei_device
*dev
, struct mei_cl
*cl
);
87 int mei_connect(struct mei_device
*dev
, struct mei_cl
*cl
);
89 #endif /* _MEI_INTERFACE_H_ */
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