drivers/target/target_core_rd.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef TARGET_CORE_RD_H
   3 #define TARGET_CORE_RD_H
   4
   5 #include <linux/module.h>
   6 #include <linux/types.h>
   7 #include <target/target_core_base.h>
   8
   9 #define RD_HBA_VERSION          "v4.0"
  10 #define RD_MCP_VERSION          "4.0"
  11
  12 /* Largest piece of memory kmalloc can allocate */
  13 #define RD_MAX_ALLOCATION_SIZE  65536
  14 #define RD_DEVICE_QUEUE_DEPTH   32
  15 #define RD_MAX_DEVICE_QUEUE_DEPTH 128
  16 #define RD_BLOCKSIZE            512
  17
  18 /* Used in target_core_init_configfs() for virtual LUN 0 access */
  19 int __init rd_module_init(void);
  20 void rd_module_exit(void);
  21
  22 struct rd_dev_sg_table {
  23         u32             page_start_offset;
  24         u32             page_end_offset;
  25         u32             rd_sg_count;
  26         struct scatterlist *sg_table;
  27 } ____cacheline_aligned;
  28
  29 #define RDF_HAS_PAGE_COUNT      0x01
  30 #define RDF_NULLIO              0x02
  31
  32 struct rd_dev {
  33         struct se_device dev;
  34         u32             rd_flags;
  35         /* Unique Ramdisk Device ID in Ramdisk HBA */
  36         u32             rd_dev_id;
  37         /* Total page count for ramdisk device */
  38         u32             rd_page_count;
  39         /* Number of SG tables in sg_table_array */
  40         u32             sg_table_count;
  41         /* Number of SG tables in sg_prot_array */
  42         u32             sg_prot_count;
  43         /* Array of rd_dev_sg_table_t containing scatterlists */
  44         struct rd_dev_sg_table *sg_table_array;
  45         /* Array of rd_dev_sg_table containing protection scatterlists */
  46         struct rd_dev_sg_table *sg_prot_array;
  47         /* Ramdisk HBA device is connected to */
  48         struct rd_host *rd_host;
  49 } ____cacheline_aligned;
  50
  51 struct rd_host {
  52         u32             rd_host_dev_id_count;
  53         u32             rd_host_id;             /* Unique Ramdisk Host ID */
  54 } ____cacheline_aligned;
  55
  56 #endif /* TARGET_CORE_RD_H */