LXR linux/drivers/target/target_core

   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 */
  16int __init rd_module_init(void);
  17void rd_module_exit(void);
  18
  19#define RRF_EMULATE_CDB         0x01
  20#define RRF_GOT_LBA             0x02
  21
  22struct 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
  35struct 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
  44struct 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
  60struct 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 */
  66