LXR linux/drivers/misc/mei/hbm.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright (c) 2003-2018, Intel Corporation. All rights reserved.
   4 * Intel Management Engine Interface (Intel MEI) Linux driver
   5 */
   6
   7#ifndef _MEI_HBM_H_
   8#define _MEI_HBM_H_
   9
  10struct mei_device;
  11struct mei_msg_hdr;
  12struct mei_cl;
  13
  14/**
  15 * enum mei_hbm_state - host bus message protocol state
  16 *
  17 * @MEI_HBM_IDLE : protocol not started
  18 * @MEI_HBM_STARTING : start request message was sent
  19 * @MEI_HBM_DR_SETUP : dma ring setup request message was sent
  20 * @MEI_HBM_ENUM_CLIENTS : enumeration request was sent
  21 * @MEI_HBM_CLIENT_PROPERTIES : acquiring clients properties
  22 * @MEI_HBM_STARTED : enumeration was completed
  23 * @MEI_HBM_STOPPED : stopping exchange
  24 */
  25enum mei_hbm_state {
  26        MEI_HBM_IDLE = 0,
  27        MEI_HBM_STARTING,
  28        MEI_HBM_DR_SETUP,
  29        MEI_HBM_ENUM_CLIENTS,
  30        MEI_HBM_CLIENT_PROPERTIES,
  31        MEI_HBM_STARTED,
  32        MEI_HBM_STOPPED,
  33};
  34
  35const char *mei_hbm_state_str(enum mei_hbm_state state);
  36
  37int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr);
  38
  39void mei_hbm_idle(struct mei_device *dev);
  40void mei_hbm_reset(struct mei_device *dev);
  41int mei_hbm_start_req(struct mei_device *dev);
  42int mei_hbm_start_wait(struct mei_device *dev);
  43int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl);
  44int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl);
  45int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl);
  46int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl);
  47bool mei_hbm_version_is_supported(struct mei_device *dev);
  48int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd);
  49void mei_hbm_pg_resume(struct mei_device *dev);
  50int mei_hbm_cl_notify_req(struct mei_device *dev,
  51                          struct mei_cl *cl, u8 request);
  52
  53#endif /* _MEI_HBM_H_ */
  54
  55