[linux-block.git] / drivers / target / target_core_rd.h

/* 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

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 */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
c66ac9db NB	2	#ifndef TARGET_CORE_RD_H
	3	#define TARGET_CORE_RD_H
	4
8dcf07be BVA	5	#include <linux/module.h>
	6	#include <linux/types.h>
	7	#include <target/target_core_base.h>
	8
c66ac9db	9	#define RD_HBA_VERSION "v4.0"
c66ac9db NB	10	#define RD_MCP_VERSION "4.0"
	11
	12	/* Largest piece of memory kmalloc can allocate */
	13	#define RD_MAX_ALLOCATION_SIZE 65536
c66ac9db NB	14	#define RD_DEVICE_QUEUE_DEPTH 32
	15	#define RD_MAX_DEVICE_QUEUE_DEPTH 128
	16	#define RD_BLOCKSIZE 512
c66ac9db	17
c66ac9db NB	18	/* Used in target_core_init_configfs() for virtual LUN 0 access */
	19	int __init rd_module_init(void);
	20	void rd_module_exit(void);
	21
c66ac9db NB	22	struct rd_dev_sg_table {
	23	u32 page_start_offset;
	24	u32 page_end_offset;
	25	u32 rd_sg_count;
	26	struct scatterlist *sg_table;
	27	} ____cacheline_aligned;
	28
	29	#define RDF_HAS_PAGE_COUNT 0x01
52c07423	30	#define RDF_NULLIO 0x02
c66ac9db NB	31
c66ac9db NB	32	struct rd_dev {
0fd97ccf	33	struct se_device dev;
c66ac9db NB	34	u32 rd_flags;
	35	/* Unique Ramdisk Device ID in Ramdisk HBA */
	36	u32 rd_dev_id;
	37	/* Total page count for ramdisk device */
	38	u32 rd_page_count;
	39	/* Number of SG tables in sg_table_array */
	40	u32 sg_table_count;
d7e8eb5d NB	41	/* Number of SG tables in sg_prot_array */
d7e8eb5d NB	42	u32 sg_prot_count;
c66ac9db NB	43	/* Array of rd_dev_sg_table_t containing scatterlists */
c66ac9db NB	44	struct rd_dev_sg_table *sg_table_array;
d7e8eb5d NB	45	/* Array of rd_dev_sg_table containing protection scatterlists */
d7e8eb5d NB	46	struct rd_dev_sg_table *sg_prot_array;
c66ac9db NB	47	/* Ramdisk HBA device is connected to */
	48	struct rd_host *rd_host;
	49	} ____cacheline_aligned;
	50
	51	struct rd_host {
	52	u32 rd_host_dev_id_count;
	53	u32 rd_host_id; /* Unique Ramdisk Host ID */
	54	} ____cacheline_aligned;
	55
	56	#endif /* TARGET_CORE_RD_H */