1 /* SPDX-License-Identifier: GPL-2.0 */
3 * intel-pasid.h - PASID idr, table and entry header
5 * Copyright (C) 2018 Intel Corporation
7 * Author: Lu Baolu <baolu.lu@linux.intel.com>
10 #ifndef __INTEL_PASID_H
11 #define __INTEL_PASID_H
14 #define PASID_MAX 0x100000
15 #define PASID_PTE_MASK 0x3F
16 #define PASID_PTE_PRESENT 1
17 #define PDE_PFN_MASK PAGE_MASK
18 #define PASID_PDE_SHIFT 6
21 * Domain ID reserved for pasid entries programmed for first-level
22 * only and pass-through transfer modes.
24 #define FLPT_DEFAULT_DID 1
26 struct pasid_dir_entry {
34 /* The representative of a PASID table */
36 void *table; /* pasid table pointer */
37 int order; /* page order of pasid table */
38 int max_pasid; /* max pasid */
39 struct list_head dev; /* device list */
42 extern u32 intel_pasid_max_id;
43 int intel_pasid_alloc_id(void *ptr, int start, int end, gfp_t gfp);
44 void intel_pasid_free_id(int pasid);
45 void *intel_pasid_lookup_id(int pasid);
46 int intel_pasid_alloc_table(struct device *dev);
47 void intel_pasid_free_table(struct device *dev);
48 struct pasid_table *intel_pasid_get_table(struct device *dev);
49 int intel_pasid_get_dev_max_id(struct device *dev);
50 struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid);
51 void intel_pasid_clear_entry(struct device *dev, int pasid);
53 #endif /* __INTEL_PASID_H */