drivers/target/target_core_rd.h

   1 #ifndef TARGET_CORE_RD_H
   2 #define TARGET_CORE_RD_H
   3
   4 #include <linux/module.h>
   5 #include <linux/types.h>
   6 #include <target/target_core_base.h>
   7
   8 #define RD_HBA_VERSION          "v4.0"
   9 #define RD_MCP_VERSION          "4.0"
  10
  11 /* Largest piece of memory kmalloc can allocate */
  12 #define RD_MAX_ALLOCATION_SIZE  65536
  13 #define RD_DEVICE_QUEUE_DEPTH   32
  14 #define RD_MAX_DEVICE_QUEUE_DEPTH 128
  15 #define RD_BLOCKSIZE            512
  16
  17 /* Used in target_core_init_configfs() for virtual LUN 0 access */
  18 int __init rd_module_init(void);
  19 void rd_module_exit(void);
  20
  21 struct rd_dev_sg_table {
  22         u32             page_start_offset;
  23         u32             page_end_offset;
  24         u32             rd_sg_count;
  25         struct scatterlist *sg_table;
  26 } ____cacheline_aligned;
  27
  28 #define RDF_HAS_PAGE_COUNT      0x01
  29 #define RDF_NULLIO              0x02
  30
  31 struct rd_dev {
  32         struct se_device dev;
  33         u32             rd_flags;
  34         /* Unique Ramdisk Device ID in Ramdisk HBA */
  35         u32             rd_dev_id;
  36         /* Total page count for ramdisk device */
  37         u32             rd_page_count;
  38         /* Number of SG tables in sg_table_array */
  39         u32             sg_table_count;
  40         /* Number of SG tables in sg_prot_array */
  41         u32             sg_prot_count;
  42         /* Array of rd_dev_sg_table_t containing scatterlists */
  43         struct rd_dev_sg_table *sg_table_array;
  44         /* Array of rd_dev_sg_table containing protection scatterlists */
  45         struct rd_dev_sg_table *sg_prot_array;
  46         /* Ramdisk HBA device is connected to */
  47         struct rd_host *rd_host;
  48 } ____cacheline_aligned;
  49
  50 struct rd_host {
  51         u32             rd_host_dev_id_count;
  52         u32             rd_host_id;             /* Unique Ramdisk Host ID */
  53 } ____cacheline_aligned;
  54
  55 #endif /* TARGET_CORE_RD_H */