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path: root/drivers/gpu/drm/exynos/exynos_drm_gem.c
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Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_gem.c')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_gem.c227
1 files changed, 119 insertions, 108 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index aba0fe47f7e..025abb3e3b6 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -55,17 +55,54 @@ static unsigned int convert_to_vm_err_msg(int msg)
return out_msg;
}
-static unsigned int get_gem_mmap_offset(struct drm_gem_object *obj)
+static int exynos_drm_gem_handle_create(struct drm_gem_object *obj,
+ struct drm_file *file_priv,
+ unsigned int *handle)
{
+ int ret;
+
+ /*
+ * allocate a id of idr table where the obj is registered
+ * and handle has the id what user can see.
+ */
+ ret = drm_gem_handle_create(file_priv, obj, handle);
+ if (ret)
+ return ret;
+
+ DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle);
+
+ /* drop reference from allocate - handle holds it now. */
+ drm_gem_object_unreference_unlocked(obj);
+
+ return 0;
+}
+
+void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj)
+{
+ struct drm_gem_object *obj;
+
DRM_DEBUG_KMS("%s\n", __FILE__);
- return (unsigned int)obj->map_list.hash.key << PAGE_SHIFT;
+ if (!exynos_gem_obj)
+ return;
+
+ obj = &exynos_gem_obj->base;
+
+ DRM_DEBUG_KMS("handle count = %d\n", atomic_read(&obj->handle_count));
+
+ exynos_drm_buf_destroy(obj->dev, exynos_gem_obj->buffer);
+
+ if (obj->map_list.map)
+ drm_gem_free_mmap_offset(obj);
+
+ /* release file pointer to gem object. */
+ drm_gem_object_release(obj);
+
+ kfree(exynos_gem_obj);
}
-static struct exynos_drm_gem_obj
- *exynos_drm_gem_init(struct drm_device *drm_dev,
- struct drm_file *file_priv, unsigned int *handle,
- unsigned int size)
+static struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
+ unsigned long size)
{
struct exynos_drm_gem_obj *exynos_gem_obj;
struct drm_gem_object *obj;
@@ -73,75 +110,41 @@ static struct exynos_drm_gem_obj
exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL);
if (!exynos_gem_obj) {
- DRM_ERROR("failed to allocate exynos gem object.\n");
- return ERR_PTR(-ENOMEM);
+ DRM_ERROR("failed to allocate exynos gem object\n");
+ return NULL;
}
obj = &exynos_gem_obj->base;
- ret = drm_gem_object_init(drm_dev, obj, size);
+ ret = drm_gem_object_init(dev, obj, size);
if (ret < 0) {
- DRM_ERROR("failed to initialize gem object.\n");
- ret = -EINVAL;
- goto err_object_init;
+ DRM_ERROR("failed to initialize gem object\n");
+ kfree(exynos_gem_obj);
+ return NULL;
}
DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp);
- ret = drm_gem_create_mmap_offset(obj);
- if (ret < 0) {
- DRM_ERROR("failed to allocate mmap offset.\n");
- goto err_create_mmap_offset;
- }
-
- /*
- * allocate a id of idr table where the obj is registered
- * and handle has the id what user can see.
- */
- ret = drm_gem_handle_create(file_priv, obj, handle);
- if (ret)
- goto err_handle_create;
-
- DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle);
-
- /* drop reference from allocate - handle holds it now. */
- drm_gem_object_unreference_unlocked(obj);
-
return exynos_gem_obj;
-
-err_handle_create:
- drm_gem_free_mmap_offset(obj);
-
-err_create_mmap_offset:
- drm_gem_object_release(obj);
-
-err_object_init:
- kfree(exynos_gem_obj);
-
- return ERR_PTR(ret);
}
struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
- struct drm_file *file_priv,
- unsigned int *handle, unsigned long size)
+ unsigned long size)
{
-
- struct exynos_drm_gem_obj *exynos_gem_obj = NULL;
struct exynos_drm_gem_buf *buffer;
+ struct exynos_drm_gem_obj *exynos_gem_obj;
size = roundup(size, PAGE_SIZE);
-
DRM_DEBUG_KMS("%s: size = 0x%lx\n", __FILE__, size);
buffer = exynos_drm_buf_create(dev, size);
- if (IS_ERR(buffer)) {
- return ERR_CAST(buffer);
- }
+ if (!buffer)
+ return ERR_PTR(-ENOMEM);
- exynos_gem_obj = exynos_drm_gem_init(dev, file_priv, handle, size);
- if (IS_ERR(exynos_gem_obj)) {
+ exynos_gem_obj = exynos_drm_gem_init(dev, size);
+ if (!exynos_gem_obj) {
exynos_drm_buf_destroy(dev, buffer);
- return exynos_gem_obj;
+ return ERR_PTR(-ENOMEM);
}
exynos_gem_obj->buffer = buffer;
@@ -150,23 +153,30 @@ struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
}
int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
+ struct drm_file *file_priv)
{
struct drm_exynos_gem_create *args = data;
- struct exynos_drm_gem_obj *exynos_gem_obj = NULL;
+ struct exynos_drm_gem_obj *exynos_gem_obj;
+ int ret;
DRM_DEBUG_KMS("%s\n", __FILE__);
- exynos_gem_obj = exynos_drm_gem_create(dev, file_priv,
- &args->handle, args->size);
+ exynos_gem_obj = exynos_drm_gem_create(dev, args->size);
if (IS_ERR(exynos_gem_obj))
return PTR_ERR(exynos_gem_obj);
+ ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv,
+ &args->handle);
+ if (ret) {
+ exynos_drm_gem_destroy(exynos_gem_obj);
+ return ret;
+ }
+
return 0;
}
int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
+ struct drm_file *file_priv)
{
struct drm_exynos_gem_map_off *args = data;
@@ -185,7 +195,7 @@ int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
}
static int exynos_drm_gem_mmap_buffer(struct file *filp,
- struct vm_area_struct *vma)
+ struct vm_area_struct *vma)
{
struct drm_gem_object *obj = filp->private_data;
struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj);
@@ -196,6 +206,7 @@ static int exynos_drm_gem_mmap_buffer(struct file *filp,
vma->vm_flags |= (VM_IO | VM_RESERVED);
+ /* in case of direct mapping, always having non-cachable attribute */
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
vma->vm_file = filp;
@@ -232,7 +243,7 @@ static const struct file_operations exynos_drm_gem_fops = {
};
int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
+ struct drm_file *file_priv)
{
struct drm_exynos_gem_mmap *args = data;
struct drm_gem_object *obj;
@@ -278,32 +289,19 @@ int exynos_drm_gem_init_object(struct drm_gem_object *obj)
return 0;
}
-void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj)
+void exynos_drm_gem_free_object(struct drm_gem_object *obj)
{
- struct exynos_drm_gem_obj *exynos_gem_obj;
-
DRM_DEBUG_KMS("%s\n", __FILE__);
- DRM_DEBUG_KMS("handle count = %d\n",
- atomic_read(&gem_obj->handle_count));
-
- if (gem_obj->map_list.map)
- drm_gem_free_mmap_offset(gem_obj);
-
- /* release file pointer to gem object. */
- drm_gem_object_release(gem_obj);
-
- exynos_gem_obj = to_exynos_gem_obj(gem_obj);
-
- exynos_drm_buf_destroy(gem_obj->dev, exynos_gem_obj->buffer);
-
- kfree(exynos_gem_obj);
+ exynos_drm_gem_destroy(to_exynos_gem_obj(obj));
}
int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
- struct drm_device *dev, struct drm_mode_create_dumb *args)
+ struct drm_device *dev,
+ struct drm_mode_create_dumb *args)
{
struct exynos_drm_gem_obj *exynos_gem_obj;
+ int ret;
DRM_DEBUG_KMS("%s\n", __FILE__);
@@ -316,19 +314,27 @@ int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
args->pitch = args->width * args->bpp >> 3;
args->size = args->pitch * args->height;
- exynos_gem_obj = exynos_drm_gem_create(dev, file_priv, &args->handle,
- args->size);
+ exynos_gem_obj = exynos_drm_gem_create(dev, args->size);
if (IS_ERR(exynos_gem_obj))
return PTR_ERR(exynos_gem_obj);
+ ret = exynos_drm_gem_handle_create(&exynos_gem_obj->base, file_priv,
+ &args->handle);
+ if (ret) {
+ exynos_drm_gem_destroy(exynos_gem_obj);
+ return ret;
+ }
+
return 0;
}
int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
- struct drm_device *dev, uint32_t handle, uint64_t *offset)
+ struct drm_device *dev, uint32_t handle,
+ uint64_t *offset)
{
struct exynos_drm_gem_obj *exynos_gem_obj;
struct drm_gem_object *obj;
+ int ret = 0;
DRM_DEBUG_KMS("%s\n", __FILE__);
@@ -343,19 +349,46 @@ int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
obj = drm_gem_object_lookup(dev, file_priv, handle);
if (!obj) {
DRM_ERROR("failed to lookup gem object.\n");
- mutex_unlock(&dev->struct_mutex);
- return -EINVAL;
+ ret = -EINVAL;
+ goto unlock;
}
exynos_gem_obj = to_exynos_gem_obj(obj);
- *offset = get_gem_mmap_offset(&exynos_gem_obj->base);
-
- drm_gem_object_unreference(obj);
+ if (!exynos_gem_obj->base.map_list.map) {
+ ret = drm_gem_create_mmap_offset(&exynos_gem_obj->base);
+ if (ret)
+ goto out;
+ }
+ *offset = (u64)exynos_gem_obj->base.map_list.hash.key << PAGE_SHIFT;
DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset);
+out:
+ drm_gem_object_unreference(obj);
+unlock:
mutex_unlock(&dev->struct_mutex);
+ return ret;
+}
+
+int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
+ struct drm_device *dev,
+ unsigned int handle)
+{
+ int ret;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ /*
+ * obj->refcount and obj->handle_count are decreased and
+ * if both them are 0 then exynos_drm_gem_free_object()
+ * would be called by callback to release resources.
+ */
+ ret = drm_gem_handle_delete(file_priv, handle);
+ if (ret < 0) {
+ DRM_ERROR("failed to delete drm_gem_handle.\n");
+ return ret;
+ }
return 0;
}
@@ -403,28 +436,6 @@ int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
return ret;
}
-
-int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
- struct drm_device *dev, unsigned int handle)
-{
- int ret;
-
- DRM_DEBUG_KMS("%s\n", __FILE__);
-
- /*
- * obj->refcount and obj->handle_count are decreased and
- * if both them are 0 then exynos_drm_gem_free_object()
- * would be called by callback to release resources.
- */
- ret = drm_gem_handle_delete(file_priv, handle);
- if (ret < 0) {
- DRM_ERROR("failed to delete drm_gem_handle.\n");
- return ret;
- }
-
- return 0;
-}
-
MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
MODULE_DESCRIPTION("Samsung SoC DRM GEM Module");
MODULE_LICENSE("GPL");