| Message ID | 20240105184624.508603-14-dmitry.osipenko@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add generic memory shrinker to VirtIO-GPU and Panfrost DRM drivers | expand |
On Fri, 5 Jan 2024 21:46:07 +0300 Dmitry Osipenko <dmitry.osipenko@collabora.com> wrote: > We're going to move away from having implicit get_pages() done by > get_pages_sgt() to simplify refcnt handling. Drivers will manage > get/put_pages() by themselves. Expose the drm_gem_shmem_get_pages() > in a public drm-shmem API. > > Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> > --- > drivers/gpu/drm/drm_gem_shmem_helper.c | 10 +++++++++- > include/drm/drm_gem_shmem_helper.h | 1 + > 2 files changed, 10 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c > index 799a3c5015ad..dc416a4bce1b 100644 > --- a/drivers/gpu/drm/drm_gem_shmem_helper.c > +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c > @@ -228,7 +228,14 @@ void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem) > } > EXPORT_SYMBOL_GPL(drm_gem_shmem_put_pages_locked); > > -static int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem) > +/* > + * drm_gem_shmem_get_pages - Increase use count on the backing pages for a shmem GEM object > + * @shmem: shmem GEM object > + * > + * This function Increases the use count and allocates the backing pages if > + * use-count equals to zero. > + */ > +int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem) > { > int ret; > > @@ -241,6 +248,7 @@ static int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem) > > return ret; > } > +EXPORT_SYMBOL_GPL(drm_gem_shmem_get_pages); > > static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem) > { > diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h > index 18020f653d7e..6dedc0739fbc 100644 > --- a/include/drm/drm_gem_shmem_helper.h > +++ b/include/drm/drm_gem_shmem_helper.h > @@ -110,6 +110,7 @@ struct drm_gem_shmem_object { > struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size); > void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem); > > +int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem); > void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem); > int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem); > void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem);
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index 799a3c5015ad..dc416a4bce1b 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -228,7 +228,14 @@ void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem) } EXPORT_SYMBOL_GPL(drm_gem_shmem_put_pages_locked); -static int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem) +/* + * drm_gem_shmem_get_pages - Increase use count on the backing pages for a shmem GEM object + * @shmem: shmem GEM object + * + * This function Increases the use count and allocates the backing pages if + * use-count equals to zero. + */ +int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem) { int ret; @@ -241,6 +248,7 @@ static int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem) return ret; } +EXPORT_SYMBOL_GPL(drm_gem_shmem_get_pages); static int drm_gem_shmem_pin_locked(struct drm_gem_shmem_object *shmem) { diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index 18020f653d7e..6dedc0739fbc 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -110,6 +110,7 @@ struct drm_gem_shmem_object { struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size); void drm_gem_shmem_free(struct drm_gem_shmem_object *shmem); +int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem); void drm_gem_shmem_put_pages_locked(struct drm_gem_shmem_object *shmem); int drm_gem_shmem_pin(struct drm_gem_shmem_object *shmem); void drm_gem_shmem_unpin(struct drm_gem_shmem_object *shmem);
We're going to move away from having implicit get_pages() done by get_pages_sgt() to simplify refcnt handling. Drivers will manage get/put_pages() by themselves. Expose the drm_gem_shmem_get_pages() in a public drm-shmem API. Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> --- drivers/gpu/drm/drm_gem_shmem_helper.c | 10 +++++++++- include/drm/drm_gem_shmem_helper.h | 1 + 2 files changed, 10 insertions(+), 1 deletion(-)