Move framebuffer vmap code from shadow-buffered plane state into the new
interfaces drm_gem_fb_vmap() and drm_gem_fb_vunmap(). These functions
provide mappings of a framebuffer's BOs into kernel address space. No
functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/drm_gem_atomic_helper.c | 37 +----------
drivers/gpu/drm/drm_gem_framebuffer_helper.c | 70 ++++++++++++++++++++
include/drm/drm_gem_atomic_helper.h | 1 +
include/drm/drm_gem_framebuffer_helper.h | 5 ++
4 files changed, 79 insertions(+), 34 deletions(-)
diff --git a/drivers/gpu/drm/drm_gem_atomic_helper.c b/drivers/gpu/drm/drm_gem_atomic_helper.c
index 26af09b959d4..b1cc19e47165 100644
--- a/drivers/gpu/drm/drm_gem_atomic_helper.c
+++ b/drivers/gpu/drm/drm_gem_atomic_helper.c
@@ -330,10 +330,7 @@ int drm_gem_prepare_shadow_fb(struct drm_plane *plane, struct drm_plane_state *p
{
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
struct drm_framebuffer *fb = plane_state->fb;
- struct drm_gem_object *obj;
- struct dma_buf_map map;
int ret;
- size_t i;
if (!fb)
return 0;
@@ -342,27 +339,7 @@ int drm_gem_prepare_shadow_fb(struct drm_plane *plane, struct drm_plane_state *p
if (ret)
return ret;
- for (i = 0; i < ARRAY_SIZE(shadow_plane_state->map); ++i) {
- obj = drm_gem_fb_get_obj(fb, i);
- if (!obj)
- continue;
- ret = drm_gem_vmap(obj, &map);
- if (ret)
- goto err_drm_gem_vunmap;
- shadow_plane_state->map[i] = map;
- }
-
- return 0;
-
-err_drm_gem_vunmap:
- while (i) {
- --i;
- obj = drm_gem_fb_get_obj(fb, i);
- if (!obj)
- continue;
- drm_gem_vunmap(obj, &shadow_plane_state->map[i]);
- }
- return ret;
+ return drm_gem_fb_vmap(fb, shadow_plane_state->map);
}
EXPORT_SYMBOL(drm_gem_prepare_shadow_fb);
@@ -374,25 +351,17 @@ EXPORT_SYMBOL(drm_gem_prepare_shadow_fb);
* This function implements struct &drm_plane_helper_funcs.cleanup_fb.
* This function unmaps all buffer objects of the plane's framebuffer.
*
- * See drm_gem_prepare_shadow_fb() for more inforamtion.
+ * See drm_gem_prepare_shadow_fb() for more information.
*/
void drm_gem_cleanup_shadow_fb(struct drm_plane *plane, struct drm_plane_state *plane_state)
{
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
struct drm_framebuffer *fb = plane_state->fb;
- size_t i = ARRAY_SIZE(shadow_plane_state->map);
- struct drm_gem_object *obj;
if (!fb)
return;
- while (i) {
- --i;
- obj = drm_gem_fb_get_obj(fb, i);
- if (!obj)
- continue;
- drm_gem_vunmap(obj, &shadow_plane_state->map[i]);
- }
+ drm_gem_fb_vunmap(fb, shadow_plane_state->map);
}
EXPORT_SYMBOL(drm_gem_cleanup_shadow_fb);
diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
index 975a3df0561e..cc4465100cc2 100644
--- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c
+++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
@@ -15,6 +15,8 @@
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_modeset_helper.h>
+#include "drm_internal.h"
+
#define AFBC_HEADER_SIZE 16
#define AFBC_TH_LAYOUT_ALIGNMENT 8
#define AFBC_HDR_ALIGN 64
@@ -308,6 +310,74 @@ drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file,
}
EXPORT_SYMBOL_GPL(drm_gem_fb_create_with_dirty);
+/**
+ * drm_gem_fb_vmap - maps all framebuffer BOs into kernel address space
+ * @fb: the framebuffer
+ * @map: returns the mapping's address for each BO
+ *
+ * This function maps all buffer objects of the given framebuffer into
+ * kernel address space and stores them in struct dma_buf_map. If the
+ * mapping operation fails for one of the BOs, the function unmaps the
+ * already established mappings automatically.
+ *
+ * See drm_gem_fb_vunmap() for unmapping.
+ *
+ * Returns:
+ * 0 on success, or a negative errno code otherwise.
+ */
+int drm_gem_fb_vmap(struct drm_framebuffer *fb, struct dma_buf_map map[DRM_FORMAT_MAX_PLANES])
+{
+ struct drm_gem_object *obj;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < DRM_FORMAT_MAX_PLANES; ++i) {
+ obj = drm_gem_fb_get_obj(fb, i);
+ if (!obj)
+ continue;
+ ret = drm_gem_vmap(obj, &map[i]);
+ if (ret)
+ goto err_drm_gem_vunmap;
+ }
+
+ return 0;
+
+err_drm_gem_vunmap:
+ while (i) {
+ --i;
+ obj = drm_gem_fb_get_obj(fb, i);
+ if (!obj)
+ continue;
+ drm_gem_vunmap(obj, &map[i]);
+ }
+ return ret;
+}
+EXPORT_SYMBOL(drm_gem_fb_vmap);
+
+/**
+ * drm_gem_fb_vunmap - unmaps framebuffer BOs from kernel address space
+ * @fb: the framebuffer
+ * @map: mapping addresses as returned by drm_gem_fb_vmap()
+ *
+ * This function unmaps all buffer objects of the given framebuffer.
+ *
+ * See drm_gem_fb_vmap() for more information.
+ */
+void drm_gem_fb_vunmap(struct drm_framebuffer *fb, struct dma_buf_map map[DRM_FORMAT_MAX_PLANES])
+{
+ unsigned int i = DRM_FORMAT_MAX_PLANES;
+ struct drm_gem_object *obj;
+
+ while (i) {
+ --i;
+ obj = drm_gem_fb_get_obj(fb, i);
+ if (!obj)
+ continue;
+ drm_gem_vunmap(obj, &map[i]);
+ }
+}
+EXPORT_SYMBOL(drm_gem_fb_vunmap);
+
static __u32 drm_gem_afbc_get_bpp(struct drm_device *dev,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
diff --git a/include/drm/drm_gem_atomic_helper.h b/include/drm/drm_gem_atomic_helper.h
index b2b441361051..f9f8b6f0494a 100644
--- a/include/drm/drm_gem_atomic_helper.h
+++ b/include/drm/drm_gem_atomic_helper.h
@@ -5,6 +5,7 @@
#include <linux/dma-buf-map.h>
+#include <drm/drm_fourcc.h>
#include <drm/drm_plane.h>
struct drm_simple_display_pipe;
diff --git a/include/drm/drm_gem_framebuffer_helper.h b/include/drm/drm_gem_framebuffer_helper.h
index 6bdffc7aa124..485617b54221 100644
--- a/include/drm/drm_gem_framebuffer_helper.h
+++ b/include/drm/drm_gem_framebuffer_helper.h
@@ -1,6 +1,8 @@
#ifndef __DRM_GEM_FB_HELPER_H__
#define __DRM_GEM_FB_HELPER_H__
+#include <linux/dma-buf-map.h>
+
struct drm_afbc_framebuffer;
struct drm_device;
struct drm_fb_helper_surface_size;
@@ -34,6 +36,9 @@ struct drm_framebuffer *
drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file,
const struct drm_mode_fb_cmd2 *mode_cmd);
+int drm_gem_fb_vmap(struct drm_framebuffer *fb, struct dma_buf_map map[DRM_FORMAT_MAX_PLANES]);
+void drm_gem_fb_vunmap(struct drm_framebuffer *fb, struct dma_buf_map map[DRM_FORMAT_MAX_PLANES]);
+
#define drm_is_afbc(modifier) \
(((modifier) & AFBC_VENDOR_AND_TYPE_MASK) == DRM_FORMAT_MOD_ARM_AFBC(0))
--
2.32.0
