linux_dsm_epyc7002/drivers/misc/mei/hbm.h
Tomas Winkler c55bf542e9 mei: hbm: setup dma ring
DMA ring is allocated upon HBM handshake and the ring parameters are set
via dedicated HBM_DMA_SETUP request command. The firmware will perform
its setup and respond with a status. On failure the DMA buffers are
released.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-26 16:59:48 +01:00

65 lines
2.1 KiB
C

/*
*
* Intel Management Engine Interface (Intel MEI) Linux driver
* Copyright (c) 2003-2012, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
*/
#ifndef _MEI_HBM_H_
#define _MEI_HBM_H_
struct mei_device;
struct mei_msg_hdr;
struct mei_cl;
/**
* enum mei_hbm_state - host bus message protocol state
*
* @MEI_HBM_IDLE : protocol not started
* @MEI_HBM_STARTING : start request message was sent
* @MEI_HBM_DR_SETUP : dma ring setup request message was sent
* @MEI_HBM_ENUM_CLIENTS : enumeration request was sent
* @MEI_HBM_CLIENT_PROPERTIES : acquiring clients properties
* @MEI_HBM_STARTED : enumeration was completed
* @MEI_HBM_STOPPED : stopping exchange
*/
enum mei_hbm_state {
MEI_HBM_IDLE = 0,
MEI_HBM_STARTING,
MEI_HBM_DR_SETUP,
MEI_HBM_ENUM_CLIENTS,
MEI_HBM_CLIENT_PROPERTIES,
MEI_HBM_STARTED,
MEI_HBM_STOPPED,
};
const char *mei_hbm_state_str(enum mei_hbm_state state);
int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr);
void mei_hbm_idle(struct mei_device *dev);
void mei_hbm_reset(struct mei_device *dev);
int mei_hbm_start_req(struct mei_device *dev);
int mei_hbm_start_wait(struct mei_device *dev);
int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl);
bool mei_hbm_version_is_supported(struct mei_device *dev);
int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd);
void mei_hbm_pg_resume(struct mei_device *dev);
int mei_hbm_cl_notify_req(struct mei_device *dev,
struct mei_cl *cl, u8 request);
#endif /* _MEI_HBM_H_ */