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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef DRM_GEM_VRAM_HELPER_H
#define DRM_GEM_VRAM_HELPER_H
#include <drm/drm_file.h>
#include <drm/drm_gem.h>
#include <drm/drm_gem_ttm_helper.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_modes.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <linux/container_of.h>
#include <linux/iosys-map.h>
struct drm_mode_create_dumb;
struct drm_plane;
struct drm_plane_state;
struct filp;
struct vm_area_struct;
#define DRM_GEM_VRAM_PL_FLAG_SYSTEM (1 << 0)
#define DRM_GEM_VRAM_PL_FLAG_VRAM (1 << 1)
#define DRM_GEM_VRAM_PL_FLAG_TOPDOWN (1 << 2)
/*
* Buffer-object helpers
*/
/**
* struct drm_gem_vram_object - GEM object backed by VRAM
* @bo: TTM buffer object
* @map: Mapping information for @bo
* @placement: TTM placement information. Supported placements are %TTM_PL_VRAM
* and %TTM_PL_SYSTEM
* @placements: TTM placement information.
*
* 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.
*
* GEM VRAM objects perform reference counting for pin and mapping
* operations. So a buffer object that has been pinned N times with
* drm_gem_vram_pin() must be unpinned N times with
* drm_gem_vram_unpin(). The same applies to pairs of
* drm_gem_vram_kmap() and drm_gem_vram_kunmap(), as well as pairs of
* drm_gem_vram_vmap() and drm_gem_vram_vunmap().
*/
struct drm_gem_vram_object {
struct ttm_buffer_object bo;
struct iosys_map map;
/**
* @vmap_use_count:
*
* Reference count on the virtual address.
* The address are un-mapped when the count reaches zero.
*/
unsigned int vmap_use_count;
/* Supported placements are %TTM_PL_VRAM and %TTM_PL_SYSTEM */
struct ttm_placement placement;
struct ttm_place placements[2];
};
/**
* drm_gem_vram_of_bo - 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);
}
/**
* drm_gem_vram_of_gem - 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, bo.base);
}
struct drm_gem_vram_object *drm_gem_vram_create(struct drm_device *dev,
size_t size,
unsigned long pg_align);
void drm_gem_vram_put(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);
int drm_gem_vram_vmap(struct drm_gem_vram_object *gbo, struct iosys_map *map);
void drm_gem_vram_vunmap(struct drm_gem_vram_object *gbo,
struct iosys_map *map);
int drm_gem_vram_fill_create_dumb(struct drm_file *file,
struct drm_device *dev,
unsigned long pg_align,
unsigned long pitch_align,
struct drm_mode_create_dumb *args);
/*
* Helpers for struct drm_driver
*/
int drm_gem_vram_driver_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args);
/*
* Helpers for struct drm_plane_helper_funcs
*/
int
drm_gem_vram_plane_helper_prepare_fb(struct drm_plane *plane,
struct drm_plane_state *new_state);
void
drm_gem_vram_plane_helper_cleanup_fb(struct drm_plane *plane,
struct drm_plane_state *old_state);
/**
* DRM_GEM_VRAM_PLANE_HELPER_FUNCS - Initializes struct drm_plane_helper_funcs
* for VRAM handling
*
* Drivers may use GEM BOs as VRAM helpers for the framebuffer memory. This
* macro initializes struct drm_plane_helper_funcs to use the respective helper
* functions.
*/
#define DRM_GEM_VRAM_PLANE_HELPER_FUNCS \
.prepare_fb = drm_gem_vram_plane_helper_prepare_fb, \
.cleanup_fb = drm_gem_vram_plane_helper_cleanup_fb
/**
* 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 \
.debugfs_init = drm_vram_mm_debugfs_init, \
.dumb_create = drm_gem_vram_driver_dumb_create, \
.dumb_map_offset = drm_gem_ttm_dumb_map_offset
/*
* VRAM memory manager
*/
/**
* struct drm_vram_mm - An instance of VRAM MM
* @vram_base: Base address of the managed video memory
* @vram_size: Size of the managed video memory in bytes
* @bdev: The TTM BO device.
*
* The fields &struct drm_vram_mm.vram_base and
* &struct drm_vram_mm.vrm_size are managed by VRAM MM, but are
* available for public read access. Use the field
* &struct drm_vram_mm.bdev to access the TTM BO device.
*/
struct drm_vram_mm {
uint64_t vram_base;
size_t vram_size;
struct ttm_device bdev;
};
/**
* drm_vram_mm_of_bdev() - Returns the container of type &struct ttm_device for
* field bdev.
* @bdev: the TTM BO device
*
* Returns:
* The containing instance of &struct drm_vram_mm
*/
static inline struct drm_vram_mm *drm_vram_mm_of_bdev(
struct ttm_device *bdev)
{
return container_of(bdev, struct drm_vram_mm, bdev);
}
void drm_vram_mm_debugfs_init(struct drm_minor *minor);
/*
* Helpers for integration with struct drm_device
*/
int drmm_vram_helper_init(struct drm_device *dev, uint64_t vram_base,
size_t vram_size);
/*
* Mode-config helpers
*/
enum drm_mode_status
drm_vram_helper_mode_valid(struct drm_device *dev,
const struct drm_display_mode *mode);
#endif
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| bridge | Folder | 0755 |
|
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| clients | Folder | 0755 |
|
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| display | Folder | 0755 |
|
|
| intel | Folder | 0755 |
|
|
| ttm | Folder | 0755 |
|
|
| Makefile | File | 642 B | 0644 |
|
| amd_asic_type.h | File | 2.35 KB | 0644 |
|
| drm_accel.h | File | 2.25 KB | 0644 |
|
| drm_atomic.h | File | 44.79 KB | 0644 |
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| drm_atomic_helper.h | File | 10.88 KB | 0644 |
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| drm_atomic_state_helper.h | File | 4.42 KB | 0644 |
|
| drm_atomic_uapi.h | File | 2.06 KB | 0644 |
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| drm_audio_component.h | File | 3.84 KB | 0644 |
|
| drm_auth.h | File | 4.18 KB | 0644 |
|
| drm_blend.h | File | 2.35 KB | 0644 |
|
| drm_bridge.h | File | 38.1 KB | 0644 |
|
| drm_bridge_connector.h | File | 405 B | 0644 |
|
| drm_buddy.h | File | 4.51 KB | 0644 |
|
| drm_cache.h | File | 3.3 KB | 0644 |
|
| drm_client.h | File | 6.45 KB | 0644 |
|
| drm_client_event.h | File | 923 B | 0644 |
|
| drm_color_mgmt.h | File | 3.91 KB | 0644 |
|
| drm_connector.h | File | 74.11 KB | 0644 |
|
| drm_crtc.h | File | 44.58 KB | 0644 |
|
| drm_crtc_helper.h | File | 2.51 KB | 0644 |
|
| drm_damage_helper.h | File | 3.33 KB | 0644 |
|
| drm_debugfs.h | File | 5.68 KB | 0644 |
|
| drm_debugfs_crc.h | File | 2.76 KB | 0644 |
|
| drm_device.h | File | 8.08 KB | 0644 |
|
| drm_drv.h | File | 17.24 KB | 0644 |
|
| drm_edid.h | File | 15.5 KB | 0644 |
|
| drm_eld.h | File | 4.76 KB | 0644 |
|
| drm_encoder.h | File | 11.07 KB | 0644 |
|
| drm_exec.h | File | 4.3 KB | 0644 |
|
| drm_fb_dma_helper.h | File | 718 B | 0644 |
|
| drm_fb_helper.h | File | 12.03 KB | 0644 |
|
| drm_fbdev_dma.h | File | 461 B | 0644 |
|
| drm_fbdev_shmem.h | File | 475 B | 0644 |
|
| drm_fbdev_ttm.h | File | 488 B | 0644 |
|
| drm_file.h | File | 14.54 KB | 0644 |
|
| drm_fixed.h | File | 5.29 KB | 0644 |
|
| drm_flip_work.h | File | 2.63 KB | 0644 |
|
| drm_format_helper.h | File | 5.8 KB | 0644 |
|
| drm_fourcc.h | File | 9.99 KB | 0644 |
|
| drm_framebuffer.h | File | 10.04 KB | 0644 |
|
| drm_gem.h | File | 18.94 KB | 0644 |
|
| drm_gem_atomic_helper.h | File | 5.52 KB | 0644 |
|
| drm_gem_dma_helper.h | File | 9.26 KB | 0644 |
|
| drm_gem_framebuffer_helper.h | File | 1.93 KB | 0644 |
|
| drm_gem_shmem_helper.h | File | 8.22 KB | 0644 |
|
| drm_gem_ttm_helper.h | File | 822 B | 0644 |
|
| drm_gem_vram_helper.h | File | 5.73 KB | 0644 |
|
| drm_gpusvm.h | File | 16.72 KB | 0644 |
|
| drm_gpuvm.h | File | 33.62 KB | 0644 |
|
| drm_ioctl.h | File | 5.82 KB | 0644 |
|
| drm_kunit_helpers.h | File | 4.12 KB | 0644 |
|
| drm_lease.h | File | 1.01 KB | 0644 |
|
| drm_managed.h | File | 4.39 KB | 0644 |
|
| drm_mipi_dbi.h | File | 7.08 KB | 0644 |
|
| drm_mipi_dsi.h | File | 17.54 KB | 0644 |
|
| drm_mm.h | File | 17.46 KB | 0644 |
|
| drm_mode_config.h | File | 32.7 KB | 0644 |
|
| drm_mode_object.h | File | 5.45 KB | 0644 |
|
| drm_modes.h | File | 19.99 KB | 0644 |
|
| drm_modeset_helper.h | File | 1.77 KB | 0644 |
|
| drm_modeset_helper_vtables.h | File | 61.26 KB | 0644 |
|
| drm_modeset_lock.h | File | 7.07 KB | 0644 |
|
| drm_module.h | File | 3.72 KB | 0644 |
|
| drm_of.h | File | 5.25 KB | 0644 |
|
| drm_pagemap.h | File | 2.98 KB | 0644 |
|
| drm_panel.h | File | 8.87 KB | 0644 |
|
| drm_panic.h | File | 5.56 KB | 0644 |
|
| drm_pciids.h | File | 61.04 KB | 0644 |
|
| drm_plane.h | File | 31.3 KB | 0644 |
|
| drm_plane_helper.h | File | 2.22 KB | 0644 |
|
| drm_prime.h | File | 4.21 KB | 0644 |
|
| drm_print.h | File | 22.74 KB | 0644 |
|
| drm_privacy_screen_consumer.h | File | 1.94 KB | 0644 |
|
| drm_privacy_screen_driver.h | File | 2.99 KB | 0644 |
|
| drm_privacy_screen_machine.h | File | 1.25 KB | 0644 |
|
| drm_probe_helper.h | File | 1.68 KB | 0644 |
|
| drm_property.h | File | 11.99 KB | 0644 |
|
| drm_rect.h | File | 7.52 KB | 0644 |
|
| drm_self_refresh_helper.h | File | 594 B | 0644 |
|
| drm_simple_kms_helper.h | File | 9.52 KB | 0644 |
|
| drm_suballoc.h | File | 2.74 KB | 0644 |
|
| drm_syncobj.h | File | 3.95 KB | 0644 |
|
| drm_sysfs.h | File | 512 B | 0644 |
|
| drm_util.h | File | 2.2 KB | 0644 |
|
| drm_utils.h | File | 592 B | 0644 |
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| drm_vblank.h | File | 10.18 KB | 0644 |
|
| drm_vblank_work.h | File | 1.99 KB | 0644 |
|
| drm_vma_manager.h | File | 8.23 KB | 0644 |
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| drm_writeback.h | File | 4.67 KB | 0644 |
|
| gpu_scheduler.h | File | 20.46 KB | 0644 |
|
| gud.h | File | 11.65 KB | 0644 |
|
| i915_pciids.h | File | 27.05 KB | 0644 |
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| spsc_queue.h | File | 3.06 KB | 0644 |
|
| task_barrier.h | File | 2.95 KB | 0644 |
|