udl: add prime fd->handle support.
udl can only be used as an output offload so doesn't need to support
handle->fd direction.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c
index 92f19ef..40efd32 100644
--- a/drivers/gpu/drm/udl/udl_gem.c
+++ b/drivers/gpu/drm/udl/udl_gem.c
@@ -9,6 +9,7 @@
#include "drmP.h"
#include "udl_drv.h"
#include <linux/shmem_fs.h>
+#include <linux/dma-buf.h>
struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
size_t size)
@@ -161,6 +162,12 @@
int page_count = obj->base.size / PAGE_SIZE;
int i;
+ if (obj->base.import_attach) {
+ drm_free_large(obj->pages);
+ obj->pages = NULL;
+ return;
+ }
+
for (i = 0; i < page_count; i++)
page_cache_release(obj->pages[i]);
@@ -195,6 +202,9 @@
{
struct udl_gem_object *obj = to_udl_bo(gem_obj);
+ if (gem_obj->import_attach)
+ drm_prime_gem_destroy(gem_obj, obj->sg);
+
if (obj->vmapping)
udl_gem_vunmap(obj);
@@ -239,3 +249,68 @@
mutex_unlock(&dev->struct_mutex);
return ret;
}
+
+static int udl_prime_create(struct drm_device *dev,
+ size_t size,
+ struct sg_table *sg,
+ struct udl_gem_object **obj_p)
+{
+ struct udl_gem_object *obj;
+ int npages;
+ int i;
+ struct scatterlist *iter;
+
+ npages = size / PAGE_SIZE;
+
+ *obj_p = NULL;
+ obj = udl_gem_alloc_object(dev, npages * PAGE_SIZE);
+ if (!obj)
+ return -ENOMEM;
+
+ obj->sg = sg;
+ obj->pages = drm_malloc_ab(npages, sizeof(struct page *));
+ if (obj->pages == NULL) {
+ DRM_ERROR("obj pages is NULL %d\n", npages);
+ return -ENOMEM;
+ }
+
+ drm_prime_sg_to_page_addr_arrays(sg, obj->pages, NULL, npages);
+
+ *obj_p = obj;
+ return 0;
+}
+
+struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
+ struct dma_buf *dma_buf)
+{
+ struct dma_buf_attachment *attach;
+ struct sg_table *sg;
+ struct udl_gem_object *uobj;
+ int ret;
+
+ /* need to attach */
+ attach = dma_buf_attach(dma_buf, dev->dev);
+ if (IS_ERR(attach))
+ return ERR_PTR(PTR_ERR(attach));
+
+ sg = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
+ if (IS_ERR(sg)) {
+ ret = PTR_ERR(sg);
+ goto fail_detach;
+ }
+
+ ret = udl_prime_create(dev, dma_buf->size, sg, &uobj);
+ if (ret) {
+ goto fail_unmap;
+ }
+
+ uobj->base.import_attach = attach;
+
+ return &uobj->base;
+
+fail_unmap:
+ dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL);
+fail_detach:
+ dma_buf_detach(dma_buf, attach);
+ return ERR_PTR(ret);
+}