intel-pasid.h 1.1 KB

12345678910111213141516171819202122232425262728293031323334353637383940
  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * intel-pasid.h - PASID idr, table and entry header
  4. *
  5. * Copyright (C) 2018 Intel Corporation
  6. *
  7. * Author: Lu Baolu <baolu.lu@linux.intel.com>
  8. */
  9. #ifndef __INTEL_PASID_H
  10. #define __INTEL_PASID_H
  11. #define PASID_MIN 0x1
  12. #define PASID_MAX 0x20000
  13. struct pasid_entry {
  14. u64 val;
  15. };
  16. /* The representative of a PASID table */
  17. struct pasid_table {
  18. void *table; /* pasid table pointer */
  19. int order; /* page order of pasid table */
  20. int max_pasid; /* max pasid */
  21. struct list_head dev; /* device list */
  22. };
  23. extern u32 intel_pasid_max_id;
  24. int intel_pasid_alloc_id(void *ptr, int start, int end, gfp_t gfp);
  25. void intel_pasid_free_id(int pasid);
  26. void *intel_pasid_lookup_id(int pasid);
  27. int intel_pasid_alloc_table(struct device *dev);
  28. void intel_pasid_free_table(struct device *dev);
  29. struct pasid_table *intel_pasid_get_table(struct device *dev);
  30. int intel_pasid_get_dev_max_id(struct device *dev);
  31. struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid);
  32. void intel_pasid_clear_entry(struct device *dev, int pasid);
  33. #endif /* __INTEL_PASID_H */