linux/include/uapi/scsi/scsi_bsg_ufs.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * UFS Transport SGIO v4 BSG Message Support
 *
 * Copyright (C) 2011-2013 Samsung India Software Operations
 * Copyright (C) 2018 Western Digital Corporation
 */
#ifndef SCSI_BSG_UFS_H
#define SCSI_BSG_UFS_H

#include <asm/byteorder.h>
#include <linux/types.h>
/*
 * This file intended to be included by both kernel and user space
 */

#define UFS_CDB_SIZE …
/* uic commands are 4DW long, per UFSHCI V2.1 paragraph 5.6.1 */
#define UIC_CMD_SIZE …

enum ufs_bsg_msg_code { … };

/* UFS RPMB Request Message Types */
enum ufs_rpmb_op_type { … };

/**
 * struct utp_upiu_header - UPIU header structure
 * @dword_0: UPIU header DW-0
 * @dword_1: UPIU header DW-1
 * @dword_2: UPIU header DW-2
 *
 * @transaction_code: Type of request or response. See also enum
 *	upiu_request_transaction and enum upiu_response_transaction.
 * @flags: UPIU flags. The meaning of individual flags depends on the
 *	transaction code.
 * @lun: Logical unit number.
 * @task_tag: Task tag.
 * @iid: Initiator ID.
 * @command_set_type: 0 for SCSI command set; 1 for UFS specific.
 * @tm_function: Task management function in case of a task management request
 *	UPIU.
 * @query_function: Query function in case of a query request UPIU.
 * @response: 0 for success; 1 for failure.
 * @status: SCSI status if this is the header of a response to a SCSI command.
 * @ehs_length: EHS length in units of 32 bytes.
 * @device_information:
 * @data_segment_length: data segment length.
 */
struct utp_upiu_header { … };

/**
 * struct utp_upiu_query - upiu request buffer structure for
 * query request.
 * @opcode: command to perform B-0
 * @idn: a value that indicates the particular type of data B-1
 * @index: Index to further identify data B-2
 * @selector: Index to further identify data B-3
 * @reserved_osf: spec reserved field B-4,5
 * @length: number of descriptor bytes to read/write B-6,7
 * @value: Attribute value to be written DW-5
 * @reserved: spec reserved DW-6,7
 */
struct utp_upiu_query { … };

/**
 * struct utp_upiu_query_v4_0 - upiu request buffer structure for
 * query request >= UFS 4.0 spec.
 * @opcode: command to perform B-0
 * @idn: a value that indicates the particular type of data B-1
 * @index: Index to further identify data B-2
 * @selector: Index to further identify data B-3
 * @osf3: spec field B-4
 * @osf4: spec field B-5
 * @osf5: spec field B 6,7
 * @osf6: spec field DW 8,9
 * @osf7: spec field DW 10,11
 */
struct utp_upiu_query_v4_0 { … };

/**
 * struct utp_upiu_cmd - Command UPIU structure
 * @exp_data_transfer_len: Data Transfer Length DW-3
 * @cdb: Command Descriptor Block CDB DW-4 to DW-7
 */
struct utp_upiu_cmd { … };

/**
 * struct utp_upiu_req - general upiu request structure
 * @header:UPIU header structure DW-0 to DW-2
 * @sc: fields structure for scsi command DW-3 to DW-7
 * @qr: fields structure for query request DW-3 to DW-7
 * @uc: use utp_upiu_query to host the 4 dwords of uic command
 */
struct utp_upiu_req { … };

struct ufs_arpmb_meta { … } __attribute__((packed));

struct ufs_ehs { … } __attribute__((packed));

/* request (CDB) structure of the sg_io_v4 */
struct ufs_bsg_request { … };

/* response (request sense data) structure of the sg_io_v4 */
struct ufs_bsg_reply { … };

struct ufs_rpmb_request { … };

struct ufs_rpmb_reply { … };
#endif /* UFS_BSG_H */