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 /* Used in target_core_init_configfs() for virtual LUN 0 access */ 18 int __init rd_module_init(void); 19 void rd_module_exit(void); 20 21 #define RRF_EMULATE_CDB 0x01 22 #define RRF_GOT_LBA 0x02 23 24 struct rd_request { 25 struct se_task rd_task; 26 27 /* SCSI CDB from iSCSI Command PDU */ 28 unsigned char rd_scsi_cdb[TCM_MAX_COMMAND_SIZE]; 29 /* Offset from start of page */ 30 u32 rd_offset; 31 /* Starting page in Ramdisk for request */ 32 u32 rd_page; 33 /* Total number of pages needed for request */ 34 u32 rd_page_count; 35 /* Scatterlist count */ 36 u32 rd_size; 37 /* Ramdisk device */ 38 struct rd_dev *rd_dev; 39 } ____cacheline_aligned; 40 41 struct rd_dev_sg_table { 42 u32 page_start_offset; 43 u32 page_end_offset; 44 u32 rd_sg_count; 45 struct scatterlist *sg_table; 46 } ____cacheline_aligned; 47 48 #define RDF_HAS_PAGE_COUNT 0x01 49 50 struct rd_dev { 51 int rd_direct; 52 u32 rd_flags; 53 /* Unique Ramdisk Device ID in Ramdisk HBA */ 54 u32 rd_dev_id; 55 /* Total page count for ramdisk device */ 56 u32 rd_page_count; 57 /* Number of SG tables in sg_table_array */ 58 u32 sg_table_count; 59 u32 rd_queue_depth; 60 /* Array of rd_dev_sg_table_t containing scatterlists */ 61 struct rd_dev_sg_table *sg_table_array; 62 /* Ramdisk HBA device is connected to */ 63 struct rd_host *rd_host; 64 } ____cacheline_aligned; 65 66 struct rd_host { 67 u32 rd_host_dev_id_count; 68 u32 rd_host_id; /* Unique Ramdisk Host ID */ 69 } ____cacheline_aligned; 70 71 #endif /* TARGET_CORE_RD_H */ 72