/* 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 16
/* uic commands are 4DW long, per UFSHCI V2.1 paragraph 5.6.1 */
#define UIC_CMD_SIZE (sizeof (__u32) * 4 )
enum ufs_bsg_msg_code {
UPIU_TRANSACTION_UIC_CMD = 0 x1F,
UPIU_TRANSACTION_ARPMB_CMD,
};
/* UFS RPMB Request Message Types */
enum ufs_rpmb_op_type {
UFS_RPMB_WRITE_KEY = 0 x01,
UFS_RPMB_READ_CNT = 0 x02,
UFS_RPMB_WRITE = 0 x03,
UFS_RPMB_READ = 0 x04,
UFS_RPMB_READ_RESP = 0 x05,
UFS_RPMB_SEC_CONF_WRITE = 0 x06,
UFS_RPMB_SEC_CONF_READ = 0 x07,
UFS_RPMB_PURGE_ENABLE = 0 x08,
UFS_RPMB_PURGE_STATUS_READ = 0 x09,
};
/**
* 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 {
union {
struct {
__be32 dword_0;
__be32 dword_1;
__be32 dword_2;
};
struct {
__u8 transaction_code;
__u8 flags;
__u8 lun;
__u8 task_tag;
#if defined (__BIG_ENDIAN)
__u8 iid: 4 ;
__u8 command_set_type: 4 ;
#elif defined (__LITTLE_ENDIAN)
__u8 command_set_type: 4 ;
__u8 iid: 4 ;
#else
#error
#endif
union {
__u8 tm_function;
__u8 query_function;
} __attribute__((packed));
__u8 response;
__u8 status;
__u8 ehs_length;
__u8 device_information;
__be16 data_segment_length;
};
};
};
/**
* 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 {
__u8 opcode;
__u8 idn;
__u8 index;
__u8 selector;
__be16 reserved_osf;
__be16 length;
__be32 value;
__be32 reserved[2 ];
};
/**
* 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 {
__u8 opcode;
__u8 idn;
__u8 index;
__u8 selector;
__u8 osf3;
__u8 osf4;
__be16 osf5;
__be32 osf6;
__be32 osf7;
/* private: */
__be32 reserved;
};
/**
* 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 {
__be32 exp_data_transfer_len;
__u8 cdb[UFS_CDB_SIZE];
};
/**
* 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 utp_upiu_header header;
union {
struct utp_upiu_cmd sc;
struct utp_upiu_query qr;
struct utp_upiu_query uc;
};
};
struct ufs_arpmb_meta {
__be16 req_resp_type;
__u8 nonce[16 ];
__be32 write_counter;
__be16 addr_lun;
__be16 block_count;
__be16 result;
} __attribute__((__packed__));
struct ufs_ehs {
__u8 length;
__u8 ehs_type;
__be16 ehssub_type;
struct ufs_arpmb_meta meta;
__u8 mac_key[32 ];
} __attribute__((__packed__));
/* request (CDB) structure of the sg_io_v4 */
struct ufs_bsg_request {
__u32 msgcode;
struct utp_upiu_req upiu_req;
};
/* response (request sense data) structure of the sg_io_v4 */
struct ufs_bsg_reply {
/*
* The completion result . Result exists in two forms :
* if negative , it is an - Exxx system errno value . There will
* be no further reply information supplied .
* else , it ' s the 4 - byte scsi error result , with driver , host ,
* msg and status fields . The per - msgcode reply structure
* will contain valid data .
*/
int result;
/* If there was reply_payload, how much was received? */
__u32 reply_payload_rcv_len;
struct utp_upiu_req upiu_rsp;
};
struct ufs_rpmb_request {
struct ufs_bsg_request bsg_request;
struct ufs_ehs ehs_req;
};
struct ufs_rpmb_reply {
struct ufs_bsg_reply bsg_reply;
struct ufs_ehs ehs_rsp;
};
#endif /* UFS_BSG_H */
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