Commit dfad8742 authored by Alexander Usyskin's avatar Alexander Usyskin Committed by Greg Kroah-Hartman
Browse files

mei: hbm: add client dma hbm messages 



Define structures for client DMA HBM protocol.
The protocol requires passing dma buffer address
and the buffer id.

Signed-off-by: default avatarAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20210206144325.25682-4-tomas.winkler@intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b7a48041

drivers/misc/mei/hw.h

+53 −0
Original line number Diff line number Diff line
@@ -142,6 +142,12 @@ 
#define MEI_HBM_CAPABILITIES_REQ_CMD        0x13

#define MEI_HBM_CAPABILITIES_RES_CMD        0x93



#define MEI_HBM_CLIENT_DMA_MAP_REQ_CMD      0x14

#define MEI_HBM_CLIENT_DMA_MAP_RES_CMD      0x94



#define MEI_HBM_CLIENT_DMA_UNMAP_REQ_CMD    0x15

#define MEI_HBM_CLIENT_DMA_UNMAP_RES_CMD    0x95



/*

 * MEI Stop Reason

 * used by hbm_host_stop_request.reason
@@ -679,4 +685,51 @@ struct hbm_capability_response { 
	u8 capability_granted[3];

} __packed;



/**

 * struct hbm_client_dma_map_request - client dma map request from host to fw

 *

 * @hbm_cmd: bus message command header

 * @client_buffer_id: client buffer id

 * @reserved: reserved

 * @address_lsb: DMA address LSB

 * @address_msb: DMA address MSB

 * @size: DMA size

 */

struct hbm_client_dma_map_request {

	u8 hbm_cmd;

	u8 client_buffer_id;

	u8 reserved[2];

	u32 address_lsb;

	u32 address_msb;

	u32 size;

} __packed;



/**

 * struct hbm_client_dma_unmap_request

 *    client dma unmap request from the host to the firmware

 *

 * @hbm_cmd: bus message command header

 * @status: unmap status

 * @client_buffer_id: client buffer id

 * @reserved: reserved

 */

struct hbm_client_dma_unmap_request {

	u8 hbm_cmd;

	u8 status;

	u8 client_buffer_id;

	u8 reserved;

} __packed;



/**

 * struct hbm_client_dma_response

 *   client dma unmap response from the firmware to the host

 *

 * @hbm_cmd: bus message command header

 * @status: command status

 */

struct hbm_client_dma_response {

	u8 hbm_cmd;

	u8 status;

} __packed;



#endif