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_MCP_VERSION          "4.0"
   6
   7 /* Largest piece of memory kmalloc can allocate */
   8 #define RD_MAX_ALLOCATION_SIZE  65536
   9 #define RD_DEVICE_QUEUE_DEPTH   32
  10 #define RD_MAX_DEVICE_QUEUE_DEPTH 128
  11 #define RD_BLOCKSIZE            512
  12
  13 /* Used in target_core_init_configfs() for virtual LUN 0 access */
  14 int __init rd_module_init(void);
  15 void rd_module_exit(void);
  16
  17 struct rd_dev_sg_table {
  18         u32             page_start_offset;
  19         u32             page_end_offset;
  20         u32             rd_sg_count;
  21         struct scatterlist *sg_table;
  22 } ____cacheline_aligned;
  23
  24 #define RDF_HAS_PAGE_COUNT      0x01
  25 #define RDF_NULLIO              0x02
  26
  27 struct rd_dev {
  28         struct se_device dev;
  29         u32             rd_flags;
  30         /* Unique Ramdisk Device ID in Ramdisk HBA */
  31         u32             rd_dev_id;
  32         /* Total page count for ramdisk device */
  33         u32             rd_page_count;
  34         /* Number of SG tables in sg_table_array */
  35         u32             sg_table_count;
  36         /* Array of rd_dev_sg_table_t containing scatterlists */
  37         struct rd_dev_sg_table *sg_table_array;
  38         /* Ramdisk HBA device is connected to */
  39         struct rd_host *rd_host;
  40 } ____cacheline_aligned;
  41
  42 struct rd_host {
  43         u32             rd_host_dev_id_count;
  44         u32             rd_host_id;             /* Unique Ramdisk Host ID */
  45 } ____cacheline_aligned;
  46
  47 #endif /* TARGET_CORE_RD_H */