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/* 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 */
  18int __init rd_module_init(void);
  19void rd_module_exit(void);
  20
  21#define RRF_EMULATE_CDB         0x01
  22#define RRF_GOT_LBA             0x02
  23
  24struct 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
  41struct 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
  50struct 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
  66struct 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