drivers/misc/mei/interface.h

   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 #define AMT_WD_DEFAULT_TIMEOUT 120      /* seconds */
  27 #define AMT_WD_MIN_TIMEOUT 120  /* seconds */
  28 #define AMT_WD_MAX_TIMEOUT 65535        /* seconds */
  29
  30 #define MEI_WATCHDOG_DATA_SIZE         16
  31 #define MEI_START_WD_DATA_SIZE         20
  32 #define MEI_WD_PARAMS_SIZE             4
  33
  34
  35 void mei_read_slots(struct mei_device *dev,
  36                      unsigned char *buffer,
  37                      unsigned long buffer_length);
  38
  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);
  43
  44 bool mei_hbuf_is_empty(struct mei_device *dev);
  45
  46 int mei_hbuf_empty_slots(struct mei_device *dev);
  47
  48 static inline size_t mei_hbuf_max_data(const struct mei_device *dev)
  49 {
  50         return dev->hbuf_depth * sizeof(u32) - sizeof(struct mei_msg_hdr);
  51 }
  52
  53 /* get slots (dwords) from a message length + header (bytes) */
  54 static inline unsigned char mei_data2slots(size_t length)
  55 {
  56         return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4);
  57 }
  58
  59 int mei_count_full_read_slots(struct mei_device *dev);
  60
  61
  62 int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl);
  63
  64
  65
  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);
  69 /*
  70  * mei_watchdog_register  - Registering watchdog interface
  71  *   once we got connection to the WD Client
  72  * @dev - mei device
  73  */
  74 void mei_watchdog_register(struct mei_device *dev);
  75 /*
  76  * mei_watchdog_unregister  - Unregistering watchdog interface
  77  * @dev - mei device
  78  */
  79 void mei_watchdog_unregister(struct mei_device *dev);
  80
  81 int mei_flow_ctrl_reduce(struct mei_device *dev, struct mei_cl *cl);
  82
  83 int mei_send_flow_control(struct mei_device *dev, struct mei_cl *cl);
  84
  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);
  88
  89 #endif /* _MEI_INTERFACE_H_ */