mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 13:56:58 +07:00
3eb0930a42
Generally catch up with 5.0-rc1, and specifically get the changes:96d4f267e4("Remove 'type' argument from access_ok() function")0b2c8f8b6b("i915: fix missing user_access_end() in page fault exception case")594cc251fd("make 'user_access_begin()' do 'access_ok()'") Signed-off-by: Jani Nikula <jani.nikula@intel.com>
128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/*
|
|
* Copyright © 2017 Red Hat
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*
|
|
* Authors:
|
|
*
|
|
*/
|
|
#ifndef __DRM_SYNCOBJ_H__
|
|
#define __DRM_SYNCOBJ_H__
|
|
|
|
#include <linux/dma-fence.h>
|
|
|
|
struct drm_file;
|
|
|
|
/**
|
|
* struct drm_syncobj - sync object.
|
|
*
|
|
* This structure defines a generic sync object which wraps a &dma_fence.
|
|
*/
|
|
struct drm_syncobj {
|
|
/**
|
|
* @refcount: Reference count of this object.
|
|
*/
|
|
struct kref refcount;
|
|
/**
|
|
* @fence:
|
|
* NULL or a pointer to the fence bound to this object.
|
|
*
|
|
* This field should not be used directly. Use drm_syncobj_fence_get()
|
|
* and drm_syncobj_replace_fence() instead.
|
|
*/
|
|
struct dma_fence __rcu *fence;
|
|
/**
|
|
* @cb_list: List of callbacks to call when the &fence gets replaced.
|
|
*/
|
|
struct list_head cb_list;
|
|
/**
|
|
* @lock: Protects &cb_list and write-locks &fence.
|
|
*/
|
|
spinlock_t lock;
|
|
/**
|
|
* @file: A file backing for this syncobj.
|
|
*/
|
|
struct file *file;
|
|
};
|
|
|
|
void drm_syncobj_free(struct kref *kref);
|
|
|
|
/**
|
|
* drm_syncobj_get - acquire a syncobj reference
|
|
* @obj: sync object
|
|
*
|
|
* This acquires an additional reference to @obj. It is illegal to call this
|
|
* without already holding a reference. No locks required.
|
|
*/
|
|
static inline void
|
|
drm_syncobj_get(struct drm_syncobj *obj)
|
|
{
|
|
kref_get(&obj->refcount);
|
|
}
|
|
|
|
/**
|
|
* drm_syncobj_put - release a reference to a sync object.
|
|
* @obj: sync object.
|
|
*/
|
|
static inline void
|
|
drm_syncobj_put(struct drm_syncobj *obj)
|
|
{
|
|
kref_put(&obj->refcount, drm_syncobj_free);
|
|
}
|
|
|
|
/**
|
|
* drm_syncobj_fence_get - get a reference to a fence in a sync object
|
|
* @syncobj: sync object.
|
|
*
|
|
* This acquires additional reference to &drm_syncobj.fence contained in @obj,
|
|
* if not NULL. It is illegal to call this without already holding a reference.
|
|
* No locks required.
|
|
*
|
|
* Returns:
|
|
* Either the fence of @obj or NULL if there's none.
|
|
*/
|
|
static inline struct dma_fence *
|
|
drm_syncobj_fence_get(struct drm_syncobj *syncobj)
|
|
{
|
|
struct dma_fence *fence;
|
|
|
|
rcu_read_lock();
|
|
fence = dma_fence_get_rcu_safe(&syncobj->fence);
|
|
rcu_read_unlock();
|
|
|
|
return fence;
|
|
}
|
|
|
|
struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
|
|
u32 handle);
|
|
void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
|
|
struct dma_fence *fence);
|
|
int drm_syncobj_find_fence(struct drm_file *file_private,
|
|
u32 handle, u64 point, u64 flags,
|
|
struct dma_fence **fence);
|
|
void drm_syncobj_free(struct kref *kref);
|
|
int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
|
|
struct dma_fence *fence);
|
|
int drm_syncobj_get_handle(struct drm_file *file_private,
|
|
struct drm_syncobj *syncobj, u32 *handle);
|
|
int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd);
|
|
|
|
#endif
|