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 */ 40
