Release 4.12 include/drm/drm_gem.h
#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.
*/
#include <linux/kref.h>
#include <drm/drm_vma_manager.h>
/**
* struct drm_gem_object - GEM buffer object
*
* This structure defines the generic parts for GEM buffer objects, which are
* mostly around handling mmap and userspace handles.
*
* Buffer objects are often abbreviated to BO.
*/
struct drm_gem_object {
/**
* @refcount:
*
* Reference count of this object
*
* Please use drm_gem_object_get() to acquire and drm_gem_object_put()
* or drm_gem_object_put_unlocked() to release a reference to a GEM
* buffer object.
*/
struct kref refcount;
/**
* @handle_count:
*
* This is the 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 &drm_device.object_name_lock.
*/
unsigned handle_count;
/**
* @dev: DRM dev this object belongs to.
*/
struct drm_device *dev;
/**
* @filp:
*
* SHMEM file node used as backing storage for swappable buffer objects.
* GEM also supports driver private objects with driver-specific backing
* storage (contiguous CMA memory, special reserved blocks). In this
* case @filp is NULL.
*/
struct file *filp;
/**
* @vma_node:
*
* Mapping info for this object to support mmap. Drivers are supposed to
* allocate the mmap offset using drm_gem_create_mmap_offset(). The
* offset itself can be retrieved using drm_vma_node_offset_addr().
*
* Memory mapping itself is handled by drm_gem_mmap(), which also checks
* that userspace is allowed to access the object.
*/
struct drm_vma_offset_node vma_node;
/**
* @size:
*
* Size of the object, in bytes. Immutable over the object's
* lifetime.
*/
size_t size;
/**
* @name:
*
* Global name for this object, starts at 1. 0 means unnamed.
* Access is covered by &drm_device.object_name_lock. This is used by
* the GEM_FLINK and GEM_OPEN ioctls.
*/
int name;
/**
* @read_domains:
*
* Read 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;
/**
* @write_domain: Corresponding unique write memory domain.
*/
uint32_t write_domain;
/**
* @pending_read_domains:
*
* 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;
/**
* @pending_write_domain: Write domain similar to @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 &drm_device.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 &drm_driver.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;
};
/**
* DEFINE_DRM_GEM_FOPS() - macro to generate file operations for GEM drivers
* @name: name for the generated structure
*
* This macro autogenerates a suitable &struct file_operations for GEM based
* drivers, which can be assigned to &drm_driver.fops. Note that this structure
* cannot be shared between drivers, because it contains a reference to the
* current module using THIS_MODULE.
*
* Note that the declaration is already marked as static - if you need a
* non-static version of this you're probably doing it wrong and will break the
* THIS_MODULE reference by accident.
*/
#define DEFINE_DRM_GEM_FOPS(name) \
static const struct file_operations name = {\
.owner = THIS_MODULE,\
.open = drm_open,\
.release = drm_release,\
.unlocked_ioctl = drm_ioctl,\
.compat_ioctl = drm_compat_ioctl,\
.poll = drm_poll,\
.read = drm_read,\
.llseek = noop_llseek,\
.mmap = drm_gem_mmap,\
}
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);
/**
* drm_gem_object_get - acquire a GEM buffer object reference
* @obj: GEM buffer object
*
* This function acquires an additional reference to @obj. It is illegal to
* call this without already holding a reference. No locks required.
*/
static inline void drm_gem_object_get(struct drm_gem_object *obj)
{
kref_get(&obj->refcount);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 19 | 95.00% | 1 | 50.00% |
| Thierry Reding | 1 | 5.00% | 1 | 50.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
/**
* __drm_gem_object_put - raw function to release a GEM buffer object reference
* @obj: GEM buffer object
*
* This function is meant to be used by drivers which are not encumbered with
* &drm_device.struct_mutex legacy locking and which are using the
* gem_free_object_unlocked callback. It avoids all the locking checks and
* locking overhead of drm_gem_object_put() and drm_gem_object_put_unlocked().
*
* Drivers should never call this directly in their code. Instead they should
* wrap it up into a ``driver_gem_object_put(struct driver_gem_object *obj)``
* wrapper function, and use that. Shared code should never call this, to
* avoid breaking drivers by accident which still depend upon
* &drm_device.struct_mutex locking.
*/
static inline void
__drm_gem_object_put(struct drm_gem_object *obj)
{
kref_put(&obj->refcount, drm_gem_object_free);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 21 | 95.45% | 1 | 50.00% |
| Thierry Reding | 1 | 4.55% | 1 | 50.00% |
| Total | 22 | 100.00% | 2 | 100.00% |
void drm_gem_object_put_unlocked(struct drm_gem_object *obj);
void drm_gem_object_put(struct drm_gem_object *obj);
/**
* drm_gem_object_reference - acquire a GEM buffer object reference
* @obj: GEM buffer object
*
* This is a compatibility alias for drm_gem_object_get() and should not be
* used by new code.
*/
static inline void drm_gem_object_reference(struct drm_gem_object *obj)
{
drm_gem_object_get(obj);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thierry Reding | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
/**
* __drm_gem_object_unreference - raw function to release a GEM buffer object
* reference
* @obj: GEM buffer object
*
* This is a compatibility alias for __drm_gem_object_put() and should not be
* used by new code.
*/
static inline void __drm_gem_object_unreference(struct drm_gem_object *obj)
{
__drm_gem_object_put(obj);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thierry Reding | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
/**
* drm_gem_object_unreference_unlocked - release a GEM buffer object reference
* @obj: GEM buffer object
*
* This is a compatibility alias for drm_gem_object_put_unlocked() and should
* not be used by new code.
*/
static inline void
drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
{
drm_gem_object_put_unlocked(obj);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thierry Reding | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
/**
* drm_gem_object_unreference - release a GEM buffer object reference
* @obj: GEM buffer object
*
* This is a compatibility alias for drm_gem_object_put() and should not be
* used by new code.
*/
static inline void drm_gem_object_unreference(struct drm_gem_object *obj)
{
drm_gem_object_put(obj);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thierry Reding | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
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_file *filp, u32 handle);
int drm_gem_dumb_destroy(struct drm_file *file,
struct drm_device *dev,
uint32_t handle);
#endif /* __DRM_GEM_H__ */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 372 | 82.12% | 6 | 75.00% |
| Thierry Reding | 79 | 17.44% | 1 | 12.50% |
| Maarten Lankhorst | 2 | 0.44% | 1 | 12.50% |
| Total | 453 | 100.00% | 8 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.