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#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__ */ |