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_STARTED, 36 MEI_HBM_ENUM_CLIENTS, 37 MEI_HBM_CLIENT_PROPERTIES, 38 MEI_HBM_STOPPED, 39 }; 40 41 int 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 void mei_hbm_reset(struct mei_device *dev); 54 int mei_hbm_start_req(struct mei_device *dev); 55 int mei_hbm_start_wait(struct mei_device *dev); 56 int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl); 57 int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl); 58 int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl); 59 int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl); 60 bool mei_hbm_version_is_supported(struct mei_device *dev); 61 int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd); 62 63 #endif /* _MEI_HBM_H_ */ 64 65