1 #ifndef TARGET_CORE_RD_H 2 #define TARGET_CORE_RD_H 3 4 #define RD_HBA_VERSION "v4.0" 5 #define RD_DR_VERSION "4.0" 6 #define RD_MCP_VERSION "4.0" 7 8 /* Largest piece of memory kmalloc can allocate */ 9 #define RD_MAX_ALLOCATION_SIZE 65536 10 /* Maximum queuedepth for the Ramdisk HBA */ 11 #define RD_HBA_QUEUE_DEPTH 256 12 #define RD_DEVICE_QUEUE_DEPTH 32 13 #define RD_MAX_DEVICE_QUEUE_DEPTH 128 14 #define RD_BLOCKSIZE 512 15 #define RD_MAX_SECTORS 1024 16 17 extern struct kmem_cache *se_mem_cache; 18 19 /* Used in target_core_init_configfs() for virtual LUN 0 access */ 20 int __init rd_module_init(void); 21 void rd_module_exit(void); 22 23 #define RRF_EMULATE_CDB 0x01 24 #define RRF_GOT_LBA 0x02 25 26 struct rd_request { 27 struct se_task rd_task; 28 29 /* SCSI CDB from iSCSI Command PDU */ 30 unsigned char rd_scsi_cdb[TCM_MAX_COMMAND_SIZE]; 31 /* Offset from start of page */ 32 u32 rd_offset; 33 /* Starting page in Ramdisk for request */ 34 u32 rd_page; 35 /* Total number of pages needed for request */ 36 u32 rd_page_count; 37 /* Scatterlist count */ 38 u32 rd_size; 39 /* Ramdisk device */ 40 struct rd_dev *rd_dev; 41 } ____cacheline_aligned; 42 43 struct rd_dev_sg_table { 44 u32 page_start_offset; 45 u32 page_end_offset; 46 u32 rd_sg_count; 47 struct scatterlist *sg_table; 48 } ____cacheline_aligned; 49 50 #define RDF_HAS_PAGE_COUNT 0x01 51 52 struct rd_dev { 53 int rd_direct; 54 u32 rd_flags; 55 /* Unique Ramdisk Device ID in Ramdisk HBA */ 56 u32 rd_dev_id; 57 /* Total page count for ramdisk device */ 58 u32 rd_page_count; 59 /* Number of SG tables in sg_table_array */ 60 u32 sg_table_count; 61 u32 rd_queue_depth; 62 /* Array of rd_dev_sg_table_t containing scatterlists */ 63 struct rd_dev_sg_table *sg_table_array; 64 /* Ramdisk HBA device is connected to */ 65 struct rd_host *rd_host; 66 } ____cacheline_aligned; 67 68 struct rd_host { 69 u32 rd_host_dev_id_count; 70 u32 rd_host_id; /* Unique Ramdisk Host ID */ 71 } ____cacheline_aligned; 72 73 #endif /* TARGET_CORE_RD_H */ 74