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drm/panfrost: Add fdinfo support for memory stats

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A new DRM GEM object function is added so that drm_show_memory_stats can
provide more accurate memory usage numbers.

Ideally, in panfrost_gem_status, the BO's purgeable flag would be checked
after locking the driver's shrinker mutex, but drm_show_memory_stats takes
over the drm file's object handle database spinlock, so there's potential
for a race condition here.

Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230929181616.2769345-4-adrian.larumbe@collabora.com
This commit is contained in:
Adrián Larumbe 2023-09-29 19:14:29 +01:00 • committed by Boris Brezillon
parent f11b0417ee
commit 9ccdac7aa8
2 changed files with 17 additions and 0 deletions
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2
drivers/gpu/drm/panfrost/panfrost_drv.c
View file

@ -568,6 +568,8 @@ static void panfrost_show_fdinfo(struct drm_printer *p, struct drm_file *file)
struct panfrost_device *pfdev = dev->dev_private;
panfrost_gpu_show_fdinfo(pfdev, file->driver_priv, p);
drm_show_memory_stats(p, file);
}
static const struct file_operations panfrost_drm_driver_fops = {

15
drivers/gpu/drm/panfrost/panfrost_gem.c
View file

@ -195,6 +195,20 @@ static int panfrost_gem_pin(struct drm_gem_object *obj)
return drm_gem_shmem_pin(&bo->base);
}
static enum drm_gem_object_status panfrost_gem_status(struct drm_gem_object *obj)
{
struct panfrost_gem_object *bo = to_panfrost_bo(obj);
enum drm_gem_object_status res = 0;
if (bo->base.pages)
res |= DRM_GEM_OBJECT_RESIDENT;
if (bo->base.madv == PANFROST_MADV_DONTNEED)
res |= DRM_GEM_OBJECT_PURGEABLE;
return res;
}
static const struct drm_gem_object_funcs panfrost_gem_funcs = {
.free = panfrost_gem_free_object,
.open = panfrost_gem_open,
@ -206,6 +220,7 @@ static const struct drm_gem_object_funcs panfrost_gem_funcs = {
.vmap = drm_gem_shmem_object_vmap,
.vunmap = drm_gem_shmem_object_vunmap,
.mmap = drm_gem_shmem_object_mmap,
.status = panfrost_gem_status,
.vm_ops = &drm_gem_shmem_vm_ops,
};