drivers/misc/mei/hbm.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 #ifndef _MEI_HBM_H_
  18 #define _MEI_HBM_H_
  19
  20 struct mei_device;
  21 struct mei_msg_hdr;
  22 struct mei_cl;
  23
  24 /**
  25  * enum mei_hbm_state - host bus message protocol state
  26  *
  27  * @MEI_HBM_IDLE : protocol not started
  28  * @MEI_HBM_START : start request message was sent
  29  * @MEI_HBM_ENUM_CLIENTS : enumeration request was sent
  30  * @MEI_HBM_CLIENT_PROPERTIES : acquiring clients properties
  31  */
  32 enum mei_hbm_state {
  33         MEI_HBM_IDLE = 0,
  34         MEI_HBM_START,
  35         MEI_HBM_ENUM_CLIENTS,
  36         MEI_HBM_CLIENT_PROPERTIES,
  37         MEI_HBM_STARTED,
  38         MEI_HBM_STOP,
  39 };
  40
  41 void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr);
  42
  43 static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length)
  44 {
  45         hdr->host_addr = 0;
  46         hdr->me_addr = 0;
  47         hdr->length = length;
  48         hdr->msg_complete = 1;
  49         hdr->reserved = 0;
  50 }
  51
  52 void mei_hbm_idle(struct mei_device *dev);
  53 int mei_hbm_start_req(struct mei_device *dev);
  54 int mei_hbm_start_wait(struct mei_device *dev);
  55 int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl);
  56 int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl);
  57 int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl);
  58 bool mei_hbm_version_is_supported(struct mei_device *dev);
  59
  60 #endif /* _MEI_HBM_H_ */
  61