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 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_CAP_SETUP : capabilities request message was sent 20 * @MEI_HBM_DR_SETUP : dma ring setup request message was sent 21 * @MEI_HBM_ENUM_CLIENTS : enumeration request was sent 22 * @MEI_HBM_CLIENT_PROPERTIES : acquiring clients properties 23 * @MEI_HBM_STARTED : enumeration was completed 24 * @MEI_HBM_STOPPED : stopping exchange 25 */ 26 enum mei_hbm_state { 27 MEI_HBM_IDLE = 0, 28 MEI_HBM_STARTING, 29 MEI_HBM_CAP_SETUP, 30 MEI_HBM_DR_SETUP, 31 MEI_HBM_ENUM_CLIENTS, 32 MEI_HBM_CLIENT_PROPERTIES, 33 MEI_HBM_STARTED, 34 MEI_HBM_STOPPED, 35 }; 36 37 const char *mei_hbm_state_str(enum mei_hbm_state state); 38 39 int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr); 40 41 void mei_hbm_idle(struct mei_device *dev); 42 void mei_hbm_reset(struct mei_device *dev); 43 int mei_hbm_start_req(struct mei_device *dev); 44 int mei_hbm_start_wait(struct mei_device *dev); 45 int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl); 46 int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl); 47 int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl); 48 int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl); 49 bool mei_hbm_version_is_supported(struct mei_device *dev); 50 int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd); 51 void mei_hbm_pg_resume(struct mei_device *dev); 52 int mei_hbm_cl_notify_req(struct mei_device *dev, 53 struct mei_cl *cl, u8 request); 54 55 #endif /* _MEI_HBM_H_ */ 56 57