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drm/vram: Add infrastructure for move_notify()

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This patch prepares VRAM helpers for lazy unmapping of buffer objects.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reported-and-tested-by: Davidlohr Bueso <dbueso@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20190906122056.32018-4-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2019-09-06 14:20:55 +02:00
parent bc25bb9192
commit f3309105b8
2 changed files with 16 additions and 0 deletions
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12
drivers/gpu/drm/drm_vram_mm_helper.c
View File

@ -98,6 +98,17 @@ static int bo_driver_verify_access(struct ttm_buffer_object *bo,
return vmm->funcs->verify_access(bo, filp);
}
static void bo_driver_move_notify(struct ttm_buffer_object *bo,
bool evict,
struct ttm_mem_reg *new_mem)
{
struct drm_vram_mm *vmm = drm_vram_mm_of_bdev(bo->bdev);
if (!vmm->funcs || !vmm->funcs->move_notify)
return;
vmm->funcs->move_notify(bo, evict, new_mem);
}
static int bo_driver_io_mem_reserve(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem)
{
@ -140,6 +151,7 @@ static struct ttm_bo_driver bo_driver = {
.eviction_valuable = ttm_bo_eviction_valuable,
.evict_flags = bo_driver_evict_flags,
.verify_access = bo_driver_verify_access,
.move_notify = bo_driver_move_notify,
.io_mem_reserve = bo_driver_io_mem_reserve,
.io_mem_free = bo_driver_io_mem_free,
};

4
include/drm/drm_vram_mm_helper.h
View File

@ -15,6 +15,8 @@ struct drm_device;
&ttm_bo_driver.evict_flags
* @verify_access: Provides an implementation for \
struct &ttm_bo_driver.verify_access
* @move_notify: Provides an implementation for
* struct &ttm_bo_driver.move_notify
*
* These callback function integrate VRAM MM with TTM buffer objects. New
* functions can be added if necessary.
@ -23,6 +25,8 @@ struct drm_vram_mm_funcs {
void (*evict_flags)(struct ttm_buffer_object *bo,
struct ttm_placement *placement);
int (*verify_access)(struct ttm_buffer_object *bo, struct file *filp);
void (*move_notify)(struct ttm_buffer_object *bo, bool evict,
struct ttm_mem_reg *new_mem);
};
/**