1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef TARGET_CORE_RD_H
3 #define TARGET_CORE_RD_H
4 
5 #include <linux/module.h>
6 #include <linux/types.h>
7 #include <target/target_core_base.h>
8 
9 #define RD_HBA_VERSION		"v4.0"
10 #define RD_MCP_VERSION		"4.0"
11 
12 /* Largest piece of memory kmalloc can allocate */
13 #define RD_MAX_ALLOCATION_SIZE	65536
14 #define RD_DEVICE_QUEUE_DEPTH	32
15 #define RD_MAX_DEVICE_QUEUE_DEPTH 128
16 #define RD_BLOCKSIZE		512
17 
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 
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
30 #define RDF_NULLIO		0x02
31 
32 struct rd_dev {
33 	struct se_device dev;
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;
41 	/* Number of SG tables in sg_prot_array */
42 	u32		sg_prot_count;
43 	/* Array of rd_dev_sg_table_t containing scatterlists */
44 	struct rd_dev_sg_table *sg_table_array;
45 	/* Array of rd_dev_sg_table containing protection scatterlists */
46 	struct rd_dev_sg_table *sg_prot_array;
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 */
57