/* SPDX-License-Identifier: GPL-2.0 */
#include <target/target_core_base.h>

#define XCOPY_HDR_LEN                   16
#define XCOPY_TARGET_DESC_LEN           32
#define XCOPY_SEGMENT_DESC_LEN          28
#define XCOPY_NAA_IEEE_REGEX_LEN        16
#define XCOPY_MAX_BYTES                 16777216 /* 16 MB */

/*
 * SPC4r37 6.4.6.1
 * Table 150 — CSCD descriptor ID values
 */
#define XCOPY_CSCD_DESC_ID_LIST_OFF_MAX 0x07FF

enum xcopy_origin_list {
        XCOL_SOURCE_RECV_OP = 0x01,
        XCOL_DEST_RECV_OP = 0x02,
};

struct xcopy_op {
        int op_origin;

        struct se_cmd *xop_se_cmd;
        struct se_device *src_dev;
        unsigned char src_tid_wwn[XCOPY_NAA_IEEE_REGEX_LEN];
        struct se_device *dst_dev;
        unsigned char dst_tid_wwn[XCOPY_NAA_IEEE_REGEX_LEN];
        unsigned char local_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN];
        struct percpu_ref *remote_lun_ref;

        sector_t src_lba;
        sector_t dst_lba;
        unsigned short stdi;
        unsigned short dtdi;
        unsigned short nolb;

        u32 xop_data_bytes;
        u32 xop_data_nents;
        struct scatterlist *xop_data_sg;
        struct work_struct xop_work;
};

/*
 * Receive Copy Results Sevice Actions
 */
#define RCR_SA_COPY_STATUS              0x00
#define RCR_SA_RECEIVE_DATA             0x01
#define RCR_SA_OPERATING_PARAMETERS     0x03
#define RCR_SA_FAILED_SEGMENT_DETAILS   0x04

/*
 * Receive Copy Results defs for Operating Parameters
 */
#define RCR_OP_MAX_TARGET_DESC_COUNT    0x2
#define RCR_OP_MAX_SG_DESC_COUNT        0x1
#define RCR_OP_MAX_DESC_LIST_LEN        1024
#define RCR_OP_MAX_SEGMENT_LEN          268435456 /* 256 MB */
#define RCR_OP_TOTAL_CONCURR_COPIES     0x1 /* Must be <= 16384 */
#define RCR_OP_MAX_CONCURR_COPIES       0x1 /* Must be <= 255 */
#define RCR_OP_DATA_SEG_GRAN_LOG2       9 /* 512 bytes in log 2 */
#define RCR_OP_INLINE_DATA_GRAN_LOG2    9 /* 512 bytes in log 2 */
#define RCR_OP_HELD_DATA_GRAN_LOG2      9 /* 512 bytes in log 2 */

extern int target_xcopy_setup_pt(void);
extern void target_xcopy_release_pt(void);
extern sense_reason_t target_do_xcopy(struct se_cmd *);
extern sense_reason_t target_do_receive_copy_results(struct se_cmd *);