/* SPDX-License-Identifier: GPL-2.0 */
#ifndef TARGET_CORE_RD_H
#define TARGET_CORE_RD_H

#include <linux/module.h>
#include <linux/types.h>
#include <target/target_core_base.h>

#define RD_HBA_VERSION          "v4.0"
#define RD_MCP_VERSION          "4.0"

/* Largest piece of memory kmalloc can allocate */
#define RD_MAX_ALLOCATION_SIZE  65536
#define RD_DEVICE_QUEUE_DEPTH   32
#define RD_MAX_DEVICE_QUEUE_DEPTH 128
#define RD_BLOCKSIZE            512

/* Used in target_core_init_configfs() for virtual LUN 0 access */
int __init rd_module_init(void);
void rd_module_exit(void);

struct rd_dev_sg_table {
        u32             page_start_offset;
        u32             page_end_offset;
        u32             rd_sg_count;
        struct scatterlist *sg_table;
} ____cacheline_aligned;

#define RDF_HAS_PAGE_COUNT      0x01
#define RDF_NULLIO              0x02
#define RDF_DUMMY               0x04

struct rd_dev {
        struct se_device dev;
        u32             rd_flags;
        /* Unique Ramdisk Device ID in Ramdisk HBA */
        u32             rd_dev_id;
        /* Total page count for ramdisk device */
        u32             rd_page_count;
        /* Number of SG tables in sg_table_array */
        u32             sg_table_count;
        /* Number of SG tables in sg_prot_array */
        u32             sg_prot_count;
        /* Array of rd_dev_sg_table_t containing scatterlists */
        struct rd_dev_sg_table *sg_table_array;
        /* Array of rd_dev_sg_table containing protection scatterlists */
        struct rd_dev_sg_table *sg_prot_array;
        /* Ramdisk HBA device is connected to */
        struct rd_host *rd_host;
} ____cacheline_aligned;

struct rd_host {
        u32             rd_host_dev_id_count;
        u32             rd_host_id;             /* Unique Ramdisk Host ID */
} ____cacheline_aligned;

#endif /* TARGET_CORE_RD_H */