target_core_rd.h 1.5 KB

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