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         /* Offset from start of page */
  26         u32             rd_offset;
  27         /* Starting page in Ramdisk for request */
  28         u32             rd_page;
  29         /* Total number of pages needed for request */
  30         u32             rd_page_count;
  31         /* Scatterlist count */
  32         u32             rd_size;
  33 } ____cacheline_aligned;
  34
  35 struct rd_dev_sg_table {
  36         u32             page_start_offset;
  37         u32             page_end_offset;
  38         u32             rd_sg_count;
  39         struct scatterlist *sg_table;
  40 } ____cacheline_aligned;
  41
  42 #define RDF_HAS_PAGE_COUNT      0x01
  43
  44 struct rd_dev {
  45         int             rd_direct;
  46         u32             rd_flags;
  47         /* Unique Ramdisk Device ID in Ramdisk HBA */
  48         u32             rd_dev_id;
  49         /* Total page count for ramdisk device */
  50         u32             rd_page_count;
  51         /* Number of SG tables in sg_table_array */
  52         u32             sg_table_count;
  53         u32             rd_queue_depth;
  54         /* Array of rd_dev_sg_table_t containing scatterlists */
  55         struct rd_dev_sg_table *sg_table_array;
  56         /* Ramdisk HBA device is connected to */
  57         struct rd_host *rd_host;
  58 } ____cacheline_aligned;
  59
  60 struct rd_host {
  61         u32             rd_host_dev_id_count;
  62         u32             rd_host_id;             /* Unique Ramdisk Host ID */
  63 } ____cacheline_aligned;
  64
  65 #endif /* TARGET_CORE_RD_H */