154 lines
4.7 KiB
C
154 lines
4.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
|
|
#ifndef DRM_GEM_VRAM_HELPER_H
|
|
#define DRM_GEM_VRAM_HELPER_H
|
|
|
|
#include <drm/drm_gem.h>
|
|
#include <drm/ttm/ttm_bo_api.h>
|
|
#include <drm/ttm/ttm_placement.h>
|
|
#include <linux/kernel.h> /* for container_of() */
|
|
|
|
struct drm_mode_create_dumb;
|
|
struct drm_vram_mm_funcs;
|
|
struct filp;
|
|
struct vm_area_struct;
|
|
|
|
#define DRM_GEM_VRAM_PL_FLAG_VRAM TTM_PL_FLAG_VRAM
|
|
#define DRM_GEM_VRAM_PL_FLAG_SYSTEM TTM_PL_FLAG_SYSTEM
|
|
|
|
/*
|
|
* Buffer-object helpers
|
|
*/
|
|
|
|
/**
|
|
* struct drm_gem_vram_object - GEM object backed by VRAM
|
|
* @gem: GEM object
|
|
* @bo: TTM buffer object
|
|
* @kmap: Mapping information for @bo
|
|
* @placement: TTM placement information. Supported placements are \
|
|
%TTM_PL_VRAM and %TTM_PL_SYSTEM
|
|
* @placements: TTM placement information.
|
|
* @pin_count: Pin counter
|
|
*
|
|
* The type struct drm_gem_vram_object represents a GEM object that is
|
|
* backed by VRAM. It can be used for simple framebuffer devices with
|
|
* dedicated memory. The buffer object can be evicted to system memory if
|
|
* video memory becomes scarce.
|
|
*/
|
|
struct drm_gem_vram_object {
|
|
struct drm_gem_object gem;
|
|
struct ttm_buffer_object bo;
|
|
struct ttm_bo_kmap_obj kmap;
|
|
|
|
/* Supported placements are %TTM_PL_VRAM and %TTM_PL_SYSTEM */
|
|
struct ttm_placement placement;
|
|
struct ttm_place placements[2];
|
|
|
|
int pin_count;
|
|
};
|
|
|
|
/**
|
|
* Returns the container of type &struct drm_gem_vram_object
|
|
* for field bo.
|
|
* @bo: the VRAM buffer object
|
|
* Returns: The containing GEM VRAM object
|
|
*/
|
|
static inline struct drm_gem_vram_object *drm_gem_vram_of_bo(
|
|
struct ttm_buffer_object *bo)
|
|
{
|
|
return container_of(bo, struct drm_gem_vram_object, bo);
|
|
}
|
|
|
|
/**
|
|
* Returns the container of type &struct drm_gem_vram_object
|
|
* for field gem.
|
|
* @gem: the GEM object
|
|
* Returns: The containing GEM VRAM object
|
|
*/
|
|
static inline struct drm_gem_vram_object *drm_gem_vram_of_gem(
|
|
struct drm_gem_object *gem)
|
|
{
|
|
return container_of(gem, struct drm_gem_vram_object, gem);
|
|
}
|
|
|
|
struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
|
|
struct ttm_bo_device *bdev,
|
|
size_t size,
|
|
unsigned long pg_align,
|
|
bool interruptible);
|
|
void drm_gem_vram_put(struct drm_gem_vram_object *gbo);
|
|
u64 drm_gem_vram_mmap_offset(struct drm_gem_vram_object *gbo);
|
|
s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo);
|
|
int drm_gem_vram_pin(struct drm_gem_vram_object *gbo, unsigned long pl_flag);
|
|
int drm_gem_vram_unpin(struct drm_gem_vram_object *gbo);
|
|
void *drm_gem_vram_kmap(struct drm_gem_vram_object *gbo, bool map,
|
|
bool *is_iomem);
|
|
void drm_gem_vram_kunmap(struct drm_gem_vram_object *gbo);
|
|
|
|
int drm_gem_vram_fill_create_dumb(struct drm_file *file,
|
|
struct drm_device *dev,
|
|
struct ttm_bo_device *bdev,
|
|
unsigned long pg_align,
|
|
bool interruptible,
|
|
struct drm_mode_create_dumb *args);
|
|
|
|
/*
|
|
* Helpers for struct ttm_bo_driver
|
|
*/
|
|
|
|
void drm_gem_vram_bo_driver_evict_flags(struct ttm_buffer_object *bo,
|
|
struct ttm_placement *pl);
|
|
|
|
int drm_gem_vram_bo_driver_verify_access(struct ttm_buffer_object *bo,
|
|
struct file *filp);
|
|
|
|
extern const struct drm_vram_mm_funcs drm_gem_vram_mm_funcs;
|
|
|
|
/*
|
|
* Helpers for struct drm_driver
|
|
*/
|
|
|
|
void drm_gem_vram_driver_gem_free_object_unlocked(struct drm_gem_object *gem);
|
|
int drm_gem_vram_driver_dumb_create(struct drm_file *file,
|
|
struct drm_device *dev,
|
|
struct drm_mode_create_dumb *args);
|
|
int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
|
|
struct drm_device *dev,
|
|
uint32_t handle, uint64_t *offset);
|
|
|
|
/**
|
|
* define DRM_GEM_VRAM_DRIVER - default callback functions for \
|
|
&struct drm_driver
|
|
*
|
|
* Drivers that use VRAM MM and GEM VRAM can use this macro to initialize
|
|
* &struct drm_driver with default functions.
|
|
*/
|
|
#define DRM_GEM_VRAM_DRIVER \
|
|
.gem_free_object_unlocked = \
|
|
drm_gem_vram_driver_gem_free_object_unlocked, \
|
|
.dumb_create = drm_gem_vram_driver_dumb_create, \
|
|
.dumb_map_offset = drm_gem_vram_driver_dumb_mmap_offset
|
|
|
|
/*
|
|
* PRIME helpers for struct drm_driver
|
|
*/
|
|
|
|
int drm_gem_vram_driver_gem_prime_pin(struct drm_gem_object *obj);
|
|
void drm_gem_vram_driver_gem_prime_unpin(struct drm_gem_object *obj);
|
|
void *drm_gem_vram_driver_gem_prime_vmap(struct drm_gem_object *obj);
|
|
void drm_gem_vram_driver_gem_prime_vunmap(struct drm_gem_object *obj,
|
|
void *vaddr);
|
|
int drm_gem_vram_driver_gem_prime_mmap(struct drm_gem_object *obj,
|
|
struct vm_area_struct *vma);
|
|
|
|
#define DRM_GEM_VRAM_DRIVER_PRIME \
|
|
.gem_prime_export = drm_gem_prime_export, \
|
|
.gem_prime_import = drm_gem_prime_import, \
|
|
.gem_prime_pin = drm_gem_vram_driver_gem_prime_pin, \
|
|
.gem_prime_unpin = drm_gem_vram_driver_gem_prime_unpin, \
|
|
.gem_prime_vmap = drm_gem_vram_driver_gem_prime_vmap, \
|
|
.gem_prime_vunmap = drm_gem_vram_driver_gem_prime_vunmap, \
|
|
.gem_prime_mmap = drm_gem_vram_driver_gem_prime_mmap
|
|
|
|
#endif
|