| Message ID | 20230912084044.955864-4-adrian.larumbe@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add fdinfo support to Panfrost | expand |
On Tue, 12 Sep 2023 09:36:57 +0100 Adrián Larumbe <adrian.larumbe@collabora.com> wrote: > 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> > --- > drivers/gpu/drm/panfrost/panfrost_drv.c | 2 ++ > drivers/gpu/drm/panfrost/panfrost_gem.c | 14 ++++++++++++++ > 2 files changed, 16 insertions(+) > > diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c > index 2d9c115821a7..e71a89a283cd 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_drv.c > +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c > @@ -567,6 +567,8 @@ 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 = { > diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c > index 3c812fbd126f..7d8f83d20539 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_gem.c > +++ b/drivers/gpu/drm/panfrost/panfrost_gem.c > @@ -195,6 +195,19 @@ 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; > + > + res |= (bo->base.madv == PANFROST_MADV_DONTNEED) ? > + DRM_GEM_OBJECT_PURGEABLE : 0; > + > + res |= (bo->base.pages) ? DRM_GEM_OBJECT_RESIDENT : 0; > + > + return res; > +} > + > static const struct drm_gem_object_funcs panfrost_gem_funcs = { > .free = panfrost_gem_free_object, > .open = panfrost_gem_open, > @@ -206,6 +219,7 @@ 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, > }; >
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index 2d9c115821a7..e71a89a283cd 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -567,6 +567,8 @@ 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 = { diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c index 3c812fbd126f..7d8f83d20539 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem.c @@ -195,6 +195,19 @@ 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; + + res |= (bo->base.madv == PANFROST_MADV_DONTNEED) ? + DRM_GEM_OBJECT_PURGEABLE : 0; + + res |= (bo->base.pages) ? DRM_GEM_OBJECT_RESIDENT : 0; + + return res; +} + static const struct drm_gem_object_funcs panfrost_gem_funcs = { .free = panfrost_gem_free_object, .open = panfrost_gem_open, @@ -206,6 +219,7 @@ 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, };
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> --- drivers/gpu/drm/panfrost/panfrost_drv.c | 2 ++ drivers/gpu/drm/panfrost/panfrost_gem.c | 14 ++++++++++++++ 2 files changed, 16 insertions(+)