40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* intel-pasid.h - PASID idr, table and entry header
|
|
*
|
|
* Copyright (C) 2018 Intel Corporation
|
|
*
|
|
* Author: Lu Baolu <baolu.lu@linux.intel.com>
|
|
*/
|
|
|
|
#ifndef __INTEL_PASID_H
|
|
#define __INTEL_PASID_H
|
|
|
|
#define PASID_MIN 0x1
|
|
#define PASID_MAX 0x20000
|
|
|
|
struct pasid_entry {
|
|
u64 val;
|
|
};
|
|
|
|
/* The representative of a PASID table */
|
|
struct pasid_table {
|
|
void *table; /* pasid table pointer */
|
|
int order; /* page order of pasid table */
|
|
int max_pasid; /* max pasid */
|
|
struct list_head dev; /* device list */
|
|
};
|
|
|
|
extern u32 intel_pasid_max_id;
|
|
int intel_pasid_alloc_id(void *ptr, int start, int end, gfp_t gfp);
|
|
void intel_pasid_free_id(int pasid);
|
|
void *intel_pasid_lookup_id(int pasid);
|
|
int intel_pasid_alloc_table(struct device *dev);
|
|
void intel_pasid_free_table(struct device *dev);
|
|
struct pasid_table *intel_pasid_get_table(struct device *dev);
|
|
int intel_pasid_get_dev_max_id(struct device *dev);
|
|
struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid);
|
|
void intel_pasid_clear_entry(struct device *dev, int pasid);
|
|
|
|
#endif /* __INTEL_PASID_H */
|