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