191 lines
6.2 KiB
C
191 lines
6.2 KiB
C
#ifndef __DRM_GEM_H__
|
|
#define __DRM_GEM_H__
|
|
|
|
/*
|
|
* GEM Graphics Execution Manager Driver Interfaces
|
|
*
|
|
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
|
|
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
|
|
* Copyright (c) 2009-2010, Code Aurora Forum.
|
|
* All rights reserved.
|
|
* Copyright © 2014 Intel Corporation
|
|
* Daniel Vetter <daniel.vetter@ffwll.ch>
|
|
*
|
|
* Author: Rickard E. (Rik) Faith <faith@valinux.com>
|
|
* Author: Gareth Hughes <gareth@valinux.com>
|
|
*
|
|
* 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
|
|
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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.
|
|
*/
|
|
|
|
/**
|
|
* This structure defines the drm_mm memory object, which will be used by the
|
|
* DRM for its buffer objects.
|
|
*/
|
|
struct drm_gem_object {
|
|
/** Reference count of this object */
|
|
struct kref refcount;
|
|
|
|
/**
|
|
* handle_count - gem file_priv handle count of this object
|
|
*
|
|
* Each handle also holds a reference. Note that when the handle_count
|
|
* drops to 0 any global names (e.g. the id in the flink namespace) will
|
|
* be cleared.
|
|
*
|
|
* Protected by dev->object_name_lock.
|
|
* */
|
|
unsigned handle_count;
|
|
|
|
/** Related drm device */
|
|
struct drm_device *dev;
|
|
|
|
/** File representing the shmem storage */
|
|
struct file *filp;
|
|
|
|
/* Mapping info for this object */
|
|
struct drm_vma_offset_node vma_node;
|
|
|
|
/**
|
|
* Size of the object, in bytes. Immutable over the object's
|
|
* lifetime.
|
|
*/
|
|
size_t size;
|
|
|
|
/**
|
|
* Global name for this object, starts at 1. 0 means unnamed.
|
|
* Access is covered by the object_name_lock in the related drm_device
|
|
*/
|
|
int name;
|
|
|
|
/**
|
|
* Memory domains. These monitor which caches contain read/write data
|
|
* related to the object. When transitioning from one set of domains
|
|
* to another, the driver is called to ensure that caches are suitably
|
|
* flushed and invalidated
|
|
*/
|
|
uint32_t read_domains;
|
|
uint32_t write_domain;
|
|
|
|
/**
|
|
* While validating an exec operation, the
|
|
* new read/write domain values are computed here.
|
|
* They will be transferred to the above values
|
|
* at the point that any cache flushing occurs
|
|
*/
|
|
uint32_t pending_read_domains;
|
|
uint32_t pending_write_domain;
|
|
|
|
/**
|
|
* dma_buf - dma buf associated with this GEM object
|
|
*
|
|
* Pointer to the dma-buf associated with this gem object (either
|
|
* through importing or exporting). We break the resulting reference
|
|
* loop when the last gem handle for this object is released.
|
|
*
|
|
* Protected by obj->object_name_lock
|
|
*/
|
|
struct dma_buf *dma_buf;
|
|
|
|
/**
|
|
* import_attach - dma buf attachment backing this object
|
|
*
|
|
* Any foreign dma_buf imported as a gem object has this set to the
|
|
* attachment point for the device. This is invariant over the lifetime
|
|
* of a gem object.
|
|
*
|
|
* The driver's ->gem_free_object callback is responsible for cleaning
|
|
* up the dma_buf attachment and references acquired at import time.
|
|
*
|
|
* Note that the drm gem/prime core does not depend upon drivers setting
|
|
* this field any more. So for drivers where this doesn't make sense
|
|
* (e.g. virtual devices or a displaylink behind an usb bus) they can
|
|
* simply leave it as NULL.
|
|
*/
|
|
struct dma_buf_attachment *import_attach;
|
|
|
|
/**
|
|
* dumb - created as dumb buffer
|
|
* Whether the gem object was created using the dumb buffer interface
|
|
* as such it may not be used for GPU rendering.
|
|
*/
|
|
bool dumb;
|
|
};
|
|
|
|
void drm_gem_object_release(struct drm_gem_object *obj);
|
|
void drm_gem_object_free(struct kref *kref);
|
|
int drm_gem_object_init(struct drm_device *dev,
|
|
struct drm_gem_object *obj, size_t size);
|
|
void drm_gem_private_object_init(struct drm_device *dev,
|
|
struct drm_gem_object *obj, size_t size);
|
|
void drm_gem_vm_open(struct vm_area_struct *vma);
|
|
void drm_gem_vm_close(struct vm_area_struct *vma);
|
|
int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
|
|
struct vm_area_struct *vma);
|
|
int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
|
|
|
|
static inline void
|
|
drm_gem_object_reference(struct drm_gem_object *obj)
|
|
{
|
|
kref_get(&obj->refcount);
|
|
}
|
|
|
|
static inline void
|
|
drm_gem_object_unreference(struct drm_gem_object *obj)
|
|
{
|
|
if (obj != NULL)
|
|
kref_put(&obj->refcount, drm_gem_object_free);
|
|
}
|
|
|
|
static inline void
|
|
drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
|
|
{
|
|
if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
|
|
struct drm_device *dev = obj->dev;
|
|
|
|
mutex_lock(&dev->struct_mutex);
|
|
if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
|
|
drm_gem_object_free(&obj->refcount);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
}
|
|
}
|
|
|
|
int drm_gem_handle_create(struct drm_file *file_priv,
|
|
struct drm_gem_object *obj,
|
|
u32 *handlep);
|
|
int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
|
|
|
|
|
|
void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
|
|
int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
|
|
int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
|
|
|
|
struct page **drm_gem_get_pages(struct drm_gem_object *obj);
|
|
void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
|
|
bool dirty, bool accessed);
|
|
|
|
struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
|
|
struct drm_file *filp,
|
|
u32 handle);
|
|
int drm_gem_dumb_destroy(struct drm_file *file,
|
|
struct drm_device *dev,
|
|
uint32_t handle);
|
|
|
|
#endif /* __DRM_GEM_H__ */
|