drivers/iommu/intel-pasid.h

   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
  10 #ifndef __INTEL_PASID_H
  11 #define __INTEL_PASID_H
  12
  13 #define PASID_MIN                       0x1
  14 #define PASID_MAX                       0x20000
  15
  16 struct pasid_entry {
  17         u64 val;
  18 };
  19
  20 /* The representative of a PASID table */
  21 struct pasid_table {
  22         void                    *table;         /* pasid table pointer */
  23         int                     order;          /* page order of pasid table */
  24         int                     max_pasid;      /* max pasid */
  25         struct list_head        dev;            /* device list */
  26 };
  27
  28 extern u32 intel_pasid_max_id;
  29 int intel_pasid_alloc_id(void *ptr, int start, int end, gfp_t gfp);
  30 void intel_pasid_free_id(int pasid);
  31 void *intel_pasid_lookup_id(int pasid);
  32 int intel_pasid_alloc_table(struct device *dev);
  33 void intel_pasid_free_table(struct device *dev);
  34 struct pasid_table *intel_pasid_get_table(struct device *dev);
  35 int intel_pasid_get_dev_max_id(struct device *dev);
  36 struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid);
  37 void intel_pasid_clear_entry(struct device *dev, int pasid);
  38
  39 #endif /* __INTEL_PASID_H */