drivers/target/target_core_rd.h

   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 #define RD_DEVICE_QUEUE_DEPTH   32
  11 #define RD_MAX_DEVICE_QUEUE_DEPTH 128
  12 #define RD_BLOCKSIZE            512
  13 #define RD_MAX_SECTORS          1024
  14
  15 /* Used in target_core_init_configfs() for virtual LUN 0 access */
  16 int __init rd_module_init(void);
  17 void rd_module_exit(void);
  18
  19 #define RRF_EMULATE_CDB         0x01
  20 #define RRF_GOT_LBA             0x02
  21
  22 struct rd_request {
  23         struct se_task  rd_task;
  24
  25         /* SCSI CDB from iSCSI Command PDU */
  26         unsigned char   rd_scsi_cdb[TCM_MAX_COMMAND_SIZE];
  27         /* Offset from start of page */
  28         u32             rd_offset;
  29         /* Starting page in Ramdisk for request */
  30         u32             rd_page;
  31         /* Total number of pages needed for request */
  32         u32             rd_page_count;
  33         /* Scatterlist count */
  34         u32             rd_size;
  35 } ____cacheline_aligned;
  36
  37 struct rd_dev_sg_table {
  38         u32             page_start_offset;
  39         u32             page_end_offset;
  40         u32             rd_sg_count;
  41         struct scatterlist *sg_table;
  42 } ____cacheline_aligned;
  43
  44 #define RDF_HAS_PAGE_COUNT      0x01
  45
  46 struct rd_dev {
  47         int             rd_direct;
  48         u32             rd_flags;
  49         /* Unique Ramdisk Device ID in Ramdisk HBA */
  50         u32             rd_dev_id;
  51         /* Total page count for ramdisk device */
  52         u32             rd_page_count;
  53         /* Number of SG tables in sg_table_array */
  54         u32             sg_table_count;
  55         u32             rd_queue_depth;
  56         /* Array of rd_dev_sg_table_t containing scatterlists */
  57         struct rd_dev_sg_table *sg_table_array;
  58         /* Ramdisk HBA device is connected to */
  59         struct rd_host *rd_host;
  60 } ____cacheline_aligned;
  61
  62 struct rd_host {
  63         u32             rd_host_dev_id_count;
  64         u32             rd_host_id;             /* Unique Ramdisk Host ID */
  65 } ____cacheline_aligned;
  66
  67 #endif /* TARGET_CORE_RD_H */