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
  10 struct mei_device;
  11 struct mei_msg_hdr;
  12 struct mei_cl;
  13 struct mei_dma_data;
  14
  15 /**
  16  * enum mei_hbm_state - host bus message protocol state
  17  *
  18  * @MEI_HBM_IDLE : protocol not started
  19  * @MEI_HBM_STARTING : start request message was sent
  20  * @MEI_HBM_CAP_SETUP : capabilities request message was sent
  21  * @MEI_HBM_DR_SETUP : dma ring setup request message was sent
  22  * @MEI_HBM_ENUM_CLIENTS : enumeration request was sent
  23  * @MEI_HBM_CLIENT_PROPERTIES : acquiring clients properties
  24  * @MEI_HBM_STARTED : enumeration was completed
  25  * @MEI_HBM_STOPPED : stopping exchange
  26  */
  27 enum mei_hbm_state {
  28         MEI_HBM_IDLE = 0,
  29         MEI_HBM_STARTING,
  30         MEI_HBM_CAP_SETUP,
  31         MEI_HBM_DR_SETUP,
  32         MEI_HBM_ENUM_CLIENTS,
  33         MEI_HBM_CLIENT_PROPERTIES,
  34         MEI_HBM_STARTED,
  35         MEI_HBM_STOPPED,
  36 };
  37
  38 const char *mei_hbm_state_str(enum mei_hbm_state state);
  39
  40 int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr);
  41
  42 void mei_hbm_idle(struct mei_device *dev);
  43 void mei_hbm_reset(struct mei_device *dev);
  44 int mei_hbm_start_req(struct mei_device *dev);
  45 int mei_hbm_start_wait(struct mei_device *dev);
  46 int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl);
  47 int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl);
  48 int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl);
  49 int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl);
  50 bool mei_hbm_version_is_supported(struct mei_device *dev);
  51 int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd);
  52 void mei_hbm_pg_resume(struct mei_device *dev);
  53 int mei_hbm_cl_notify_req(struct mei_device *dev,
  54                           struct mei_cl *cl, u8 request);
  55 int mei_hbm_cl_dma_map_req(struct mei_device *dev, struct mei_cl *cl);
  56 int mei_hbm_cl_dma_unmap_req(struct mei_device *dev, struct mei_cl *cl);
  57 #endif /* _MEI_HBM_H_ */
  58