diff mbox series

[v18,12/26] drm/shmem-helper: Make drm_gem_shmem_get_pages() public

Message ID 20231029230205.93277-13-dmitry.osipenko@collabora.com
State New
Headers
Series Add generic memory shrinker to VirtIO-GPU and Panfrost DRM drivers |

Commit Message

Dmitry Osipenko Oct. 29, 2023, 11:01 p.m. UTC 
  We're going to move away from having implicit get_pages() done by
get_pages_sgt() to ease 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(-)

Comments

Boris Brezillon Nov. 10, 2023, 10:17 a.m. UTC | #1 
On Mon, 30 Oct 2023 02:01:51 +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 ease simplify refcnt handling. Drivers will manage

Nit: ease or simplify, not both.

> 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(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index 24ff2b99e75b..ca6f422c0dfc 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -227,7 +227,14 @@ 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;
>  
> @@ -240,6 +247,7 @@ 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 e7b3f4c02bf5..45cd293e10a4 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 mbox series

Patch

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 24ff2b99e75b..ca6f422c0dfc 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -227,7 +227,14 @@  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;
 
@@ -240,6 +247,7 @@  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 e7b3f4c02bf5..45cd293e10a4 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);