Cc: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: Anusha Srivatsa <asriv...@redhat.com>
Cc: Christian König <christian.koe...@amd.com>
Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Cc: Maxime Ripard <mrip...@kernel.org>
Cc: Sumit Semwal <sumit.sem...@linaro.org>
Cc: "Christian König" <christian.koe...@amd.com>
Cc: linux-me...@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linaro-mm-...@lists.linaro.org
Cc: <sta...@vger.kernel.org>
---
drivers/gpu/drm/drm_framebuffer.c | 23 +++++++-
drivers/gpu/drm/drm_gem.c | 59 +++++++++++++-------
drivers/gpu/drm/drm_gem_framebuffer_helper.c | 16 +++---
drivers/gpu/drm/drm_internal.h | 4 +-
drivers/gpu/drm/gma500/fbdev.c | 2 -
5 files changed, 69 insertions(+), 35 deletions(-)
diff --git a/drivers/gpu/drm/drm_framebuffer.c
b/drivers/gpu/drm/drm_framebuffer.c
index b781601946db..e4a10dd053fc 100644
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -862,11 +862,17 @@ EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_framebuffer_free);
int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
const struct drm_framebuffer_funcs *funcs)
{
+ unsigned int i;
int ret;
if (WARN_ON_ONCE(fb->dev != dev || !fb->format))
return -EINVAL;
+ for (i = 0; i < fb->format->num_planes; i++) {
+ if (fb->obj[i])
+
drm_gem_object_handle_get_if_exists_unlocked(fb->obj[i]);
+ }
+
INIT_LIST_HEAD(&fb->filp_head);
fb->funcs = funcs;
@@ -875,7 +881,7 @@ int drm_framebuffer_init(struct drm_device *dev, struct
drm_framebuffer *fb,
ret = __drm_mode_object_add(dev, &fb->base, DRM_MODE_OBJECT_FB,
false, drm_framebuffer_free);
if (ret)
- goto out;
+ goto err;
mutex_lock(&dev->mode_config.fb_lock);
dev->mode_config.num_fb++;
@@ -883,7 +889,14 @@ int drm_framebuffer_init(struct drm_device *dev, struct
drm_framebuffer *fb,
mutex_unlock(&dev->mode_config.fb_lock);
drm_mode_object_register(dev, &fb->base);
-out:
+
+ return 0;
+
+err:
+ for (i = 0; i < fb->format->num_planes; i++) {
+ if (fb->obj[i])
+
drm_gem_object_handle_put_if_exists_unlocked(fb->obj[i]);
+ }
return ret;
}
EXPORT_SYMBOL(drm_framebuffer_init);
@@ -960,6 +973,12 @@ EXPORT_SYMBOL(drm_framebuffer_unregister_private);
void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
{
struct drm_device *dev = fb->dev;
+ unsigned int i;
+
+ for (i = 0; i < fb->format->num_planes; i++) {
+ if (fb->obj[i])
+
drm_gem_object_handle_put_if_exists_unlocked(fb->obj[i]);
+ }
mutex_lock(&dev->mode_config.fb_lock);
list_del(&fb->head);
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index bc505d938b3e..9d8b9e6b7d25 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -224,23 +224,27 @@ static void drm_gem_object_handle_get(struct
drm_gem_object *obj)
}
/**
- * drm_gem_object_handle_get_unlocked - acquire reference on user-space handles
+ * drm_gem_object_handle_get_if_exists_unlocked - acquire reference on
user-space handle, if any
* @obj: GEM object
*
- * Acquires a reference on the GEM buffer object's handle. Required
- * to keep the GEM object alive. Call drm_gem_object_handle_put_unlocked()
- * to release the reference.
+ * Acquires a reference on the GEM buffer object's handle. Required to keep
+ * the GEM object alive. Call drm_gem_object_handle_put_if_exists_unlocked()
+ * to release the reference. Does nothing if the buffer object has no handle.
*/
-void drm_gem_object_handle_get_unlocked(struct drm_gem_object *obj)
+void drm_gem_object_handle_get_if_exists_unlocked(struct drm_gem_object *obj)
{
struct drm_device *dev = obj->dev;
guard(mutex)(&dev->object_name_lock);
- drm_WARN_ON(dev, !obj->handle_count); /* first ref taken in create-tail helper */
- drm_gem_object_handle_get(obj);
+ /*
+ * First ref taken during GEM object creation, if any. Some
+ * drivers set up internal framebuffers with GEM objects that
+ * do not have a GEM handle. Hence, this counter can be zero.
+ */
+ if (obj->handle_count)
+ drm_gem_object_handle_get(obj);
}
-EXPORT_SYMBOL(drm_gem_object_handle_get_unlocked);
/**
* drm_gem_object_handle_free - release resources bound to userspace handles
@@ -272,21 +276,11 @@ static void drm_gem_object_exported_dma_buf_free(struct
drm_gem_object *obj)
}
}
-/**
- * drm_gem_object_handle_put_unlocked - releases reference on user-space
handles
- * @obj: GEM object
- *
- * Releases a reference on the GEM buffer object's handle. Possibly releases
- * the GEM buffer object and associated dma-buf objects.
- */
-void drm_gem_object_handle_put_unlocked(struct drm_gem_object *obj)
+static void drm_gem_object_handle_put_unlocked_tail(struct drm_gem_object *obj)
{
struct drm_device *dev = obj->dev;
bool final = false;
- if (WARN_ON(READ_ONCE(obj->handle_count) == 0))
- return;
-
/*
* Must bump handle count first as this may be the last
* ref, in which case the object would disappear before we
@@ -304,7 +298,32 @@ void drm_gem_object_handle_put_unlocked(struct
drm_gem_object *obj)
if (final)
drm_gem_object_put(obj);
}
-EXPORT_SYMBOL(drm_gem_object_handle_put_unlocked);
+
+static void drm_gem_object_handle_put_unlocked(struct drm_gem_object *obj)
+{
+ struct drm_device *dev = obj->dev;
+
+ if (drm_WARN_ON(dev, READ_ONCE(obj->handle_count) == 0))
+ return;
+
+ drm_gem_object_handle_put_unlocked_tail(obj);
+}
+
+/**
+ * drm_gem_object_handle_put_if_exists_unlocked - releases reference on
user-space handle, if any
+ * @obj: GEM object
+ *
+ * Releases a reference on the GEM buffer object's handle. Possibly releases
+ * the GEM buffer object and associated dma-buf objects. Does nothing if the
+ * buffer object has no handle.
+ */
+void drm_gem_object_handle_put_if_exists_unlocked(struct drm_gem_object *obj)
+{
+ if (!obj->handle_count)
+ return;
+
+ drm_gem_object_handle_put_unlocked_tail(obj);
+}
/*
* Called at device or object close to release the file's
diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c
b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
index c60d0044d036..618ce725cd75 100644
--- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c
+++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
@@ -100,7 +100,7 @@ void drm_gem_fb_destroy(struct drm_framebuffer *fb)
unsigned int i;
for (i = 0; i < fb->format->num_planes; i++)
- drm_gem_object_handle_put_unlocked(fb->obj[i]);
+ drm_gem_object_put(fb->obj[i]);
drm_framebuffer_cleanup(fb);
kfree(fb);
@@ -183,10 +183,8 @@ int drm_gem_fb_init_with_funcs(struct drm_device *dev,
if (!objs[i]) {
drm_dbg_kms(dev, "Failed to lookup GEM object\n");
ret = -ENOENT;
- goto err_gem_object_handle_put_unlocked;
+ goto err_gem_object_put;
}
- drm_gem_object_handle_get_unlocked(objs[i]);
- drm_gem_object_put(objs[i]);
min_size = (height - 1) * mode_cmd->pitches[i]
+ drm_format_info_min_pitch(info, i, width)
@@ -196,22 +194,22 @@ int drm_gem_fb_init_with_funcs(struct drm_device *dev,
drm_dbg_kms(dev,
"GEM object size (%zu) smaller than minimum size
(%u) for plane %d\n",
objs[i]->size, min_size, i);
- drm_gem_object_handle_put_unlocked(objs[i]);
+ drm_gem_object_put(objs[i]);
ret = -EINVAL;
- goto err_gem_object_handle_put_unlocked;
+ goto err_gem_object_put;
}
}
ret = drm_gem_fb_init(dev, fb, mode_cmd, objs, i, funcs);
if (ret)
- goto err_gem_object_handle_put_unlocked;
+ goto err_gem_object_put;
return 0;
-err_gem_object_handle_put_unlocked:
+err_gem_object_put:
while (i > 0) {
--i;
- drm_gem_object_handle_put_unlocked(objs[i]);
+ drm_gem_object_put(objs[i]);
}
return ret;
}
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index f7b414a813ae..9233019f54a8 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -161,8 +161,8 @@ void drm_sysfs_lease_event(struct drm_device *dev);
/* drm_gem.c */
int drm_gem_init(struct drm_device *dev);
-void drm_gem_object_handle_get_unlocked(struct drm_gem_object *obj);
-void drm_gem_object_handle_put_unlocked(struct drm_gem_object *obj);
+void drm_gem_object_handle_get_if_exists_unlocked(struct drm_gem_object *obj);
+void drm_gem_object_handle_put_if_exists_unlocked(struct drm_gem_object *obj);
int drm_gem_handle_create_tail(struct drm_file *file_priv,
struct drm_gem_object *obj,
u32 *handlep);
diff --git a/drivers/gpu/drm/gma500/fbdev.c b/drivers/gpu/drm/gma500/fbdev.c
index 8edefea2ef59..afd252108cfa 100644
--- a/drivers/gpu/drm/gma500/fbdev.c
+++ b/drivers/gpu/drm/gma500/fbdev.c
@@ -121,7 +121,6 @@ static void psb_fbdev_fb_destroy(struct fb_info *info)
drm_fb_helper_fini(fb_helper);
drm_framebuffer_unregister_private(fb);
- fb->obj[0] = NULL;
drm_framebuffer_cleanup(fb);
kfree(fb);
@@ -243,7 +242,6 @@ int psb_fbdev_driver_fbdev_probe(struct drm_fb_helper *fb_helper,
err_drm_framebuffer_unregister_private:
drm_framebuffer_unregister_private(fb);
- fb->obj[0] = NULL;
drm_framebuffer_cleanup(fb);
kfree(fb);
err_drm_gem_object_put:
