linux/drivers/misc/mei/hbm.h
Alexander Usyskin 369aea8459 mei: implement client dma setup.
Implement HBM message protocol to setup and tear down
DMA buffer on behalf of an client. On top there DMA
buffer allocation and its life time management.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20210206144325.25682-5-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-06 15:48:11 +01:00

59 lines
1.9 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2003-2018, Intel Corporation. All rights reserved.
* Intel Management Engine Interface (Intel MEI) Linux driver
*/
#ifndef _MEI_HBM_H_
#define _MEI_HBM_H_
struct mei_device;
struct mei_msg_hdr;
struct mei_cl;
struct mei_dma_data;
/**
* 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_CAP_SETUP : capabilities 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_CAP_SETUP,
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);
int mei_hbm_cl_dma_map_req(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_dma_unmap_req(struct mei_device *dev, struct mei_cl *cl);
#endif /* _MEI_HBM_H_ */