mirror of
https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
synced 2025-08-11 06:59:29 -04:00
118 lines
3.9 KiB
C
118 lines
3.9 KiB
C
/* $NetBSD: drm_vma_manager.h,v 1.1 2014/07/16 20:56:25 riastradh Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2014 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Taylor R. Campbell.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _DRM_DRM_VMA_MANAGER_H_
|
|
#define _DRM_DRM_VMA_MANAGER_H_
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/rbtree.h>
|
|
#include <sys/rwlock.h>
|
|
#include <sys/vmem.h>
|
|
|
|
struct drm_vma_offset_manager {
|
|
krwlock_t vom_lock;
|
|
struct rb_tree vom_nodes;
|
|
struct vmem *vom_vmem;
|
|
};
|
|
|
|
struct drm_vma_offset_node {
|
|
krwlock_t von_lock;
|
|
vmem_addr_t von_startpage;
|
|
vmem_size_t von_npages;
|
|
struct rb_tree von_files;
|
|
struct rb_node von_rb_node;
|
|
};
|
|
|
|
static inline unsigned long
|
|
drm_vma_node_start(struct drm_vma_offset_node *node)
|
|
{
|
|
return node->von_startpage;
|
|
}
|
|
|
|
static inline unsigned long
|
|
drm_vma_node_size(struct drm_vma_offset_node *node)
|
|
{
|
|
return node->von_npages;
|
|
}
|
|
|
|
static inline bool
|
|
drm_vma_node_has_offset(struct drm_vma_offset_node *node)
|
|
{
|
|
return (node->von_npages != 0);
|
|
}
|
|
|
|
static inline uint64_t
|
|
drm_vma_node_offset_addr(struct drm_vma_offset_node *node)
|
|
{
|
|
return (uint64_t)node->von_startpage << PAGE_SHIFT;
|
|
}
|
|
|
|
struct drm_vma_offset_file {
|
|
struct file *vof_file;
|
|
struct rb_node vof_rb_node;
|
|
};
|
|
|
|
void drm_vma_offset_manager_init(struct drm_vma_offset_manager *,
|
|
unsigned long, unsigned long);
|
|
void drm_vma_offset_manager_destroy(struct drm_vma_offset_manager *);
|
|
|
|
/*
|
|
* This is called drm_vma_node_reset upstream. Name is changed so you
|
|
* have to find calls and match them with drm_vma_node_destroy.
|
|
*/
|
|
void drm_vma_node_init(struct drm_vma_offset_node *);
|
|
|
|
/* This does not exist upstream. */
|
|
void drm_vma_node_destroy(struct drm_vma_offset_node *);
|
|
|
|
int drm_vma_offset_add(struct drm_vma_offset_manager *,
|
|
struct drm_vma_offset_node *, unsigned long);
|
|
void drm_vma_offset_remove(struct drm_vma_offset_manager *,
|
|
struct drm_vma_offset_node *);
|
|
|
|
void drm_vma_offset_lock_lookup(struct drm_vma_offset_manager *);
|
|
void drm_vma_offset_unlock_lookup(struct drm_vma_offset_manager *);
|
|
struct drm_vma_offset_node *
|
|
drm_vma_offset_lookup_locked(struct drm_vma_offset_manager *,
|
|
unsigned long, unsigned long);
|
|
struct drm_vma_offset_node *
|
|
drm_vma_offset_exact_lookup(struct drm_vma_offset_manager *,
|
|
unsigned long, unsigned long);
|
|
|
|
int drm_vma_node_allow(struct drm_vma_offset_node *, struct file *);
|
|
void drm_vma_node_revoke(struct drm_vma_offset_node *, struct file *);
|
|
bool drm_vma_node_is_allowed(struct drm_vma_offset_node *, struct file *);
|
|
int drm_vma_node_verify_access(struct drm_vma_offset_node *,
|
|
struct file *);
|
|
|
|
#endif /* _DRM_DRM_VMA_MANAGER_H_ */
|