freedreno: add dmabuf import/export helpers

Signed-off-by: Rob Clark <robclark@freedesktop.org>

3 files changed, 46 insertions, 0 deletions

diff --git a/freedreno/freedreno_bo.c b/freedreno/freedreno_bo.c
index 3a2e4649..b90fc567 100644
--- a/freedreno/freedreno_bo.c
+++ b/freedreno/freedreno_bo.c
@@ -209,6 +209,25 @@ fd_bo_from_handle(struct fd_device *dev, uint32_t handle, uint32_t size)
 	return bo;
 }
 
+drm_public struct fd_bo *
+fd_bo_from_dmabuf(struct fd_device *dev, int fd)
+{
+	struct drm_prime_handle req = {
+			.fd = fd,
+	};
+	int ret, size;
+
+	ret = drmIoctl(dev->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &req);
+	if (ret) {
+		return NULL;
+	}
+
+	/* hmm, would be nice if we had a way to figure out the size.. */
+	size = 0;
+
+	return fd_bo_from_handle(dev, req.handle, size);
+}
+
 drm_public struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name)
 {
 	struct drm_gem_open req = {
@@ -255,6 +274,11 @@ drm_public void fd_bo_del(struct fd_bo *bo)
 	if (!atomic_dec_and_test(&bo->refcnt))
 		return;
 
+	if (bo->fd) {
+		close(bo->fd);
+		bo->fd = 0;
+	}
+
 	pthread_mutex_lock(&table_lock);
 
 	if (bo->bo_reuse) {
@@ -335,6 +359,25 @@ drm_public uint32_t fd_bo_handle(struct fd_bo *bo)
 	return bo->handle;
 }
 
+drm_public int fd_bo_dmabuf(struct fd_bo *bo)
+{
+	if (!bo->fd) {
+		struct drm_prime_handle req = {
+				.handle = bo->handle,
+				.flags = DRM_CLOEXEC,
+		};
+		int ret;
+
+		ret = drmIoctl(bo->dev->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &req);
+		if (ret) {
+			return ret;
+		}
+
+		bo->fd = req.fd;
+	}
+	return dup(bo->fd);
+}
+
 drm_public uint32_t fd_bo_size(struct fd_bo *bo)
 {
 	return bo->size;
diff --git a/freedreno/freedreno_drmif.h b/freedreno/freedreno_drmif.h
index 7c54e04b..88fc03de 100644
--- a/freedreno/freedreno_drmif.h
+++ b/freedreno/freedreno_drmif.h
@@ -98,10 +98,12 @@ struct fd_bo * fd_bo_from_fbdev(struct fd_pipe *pipe,
 struct fd_bo *fd_bo_from_handle(struct fd_device *dev,
 		uint32_t handle, uint32_t size);
 struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name);
+struct fd_bo * fd_bo_from_dmabuf(struct fd_device *dev, int fd);
 struct fd_bo * fd_bo_ref(struct fd_bo *bo);
 void fd_bo_del(struct fd_bo *bo);
 int fd_bo_get_name(struct fd_bo *bo, uint32_t *name);
 uint32_t fd_bo_handle(struct fd_bo *bo);
+int fd_bo_dmabuf(struct fd_bo *bo);
 uint32_t fd_bo_size(struct fd_bo *bo);
 void * fd_bo_map(struct fd_bo *bo);
 int fd_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op);
diff --git a/freedreno/freedreno_priv.h b/freedreno/freedreno_priv.h
index 416a3b3c..b204e534 100644
--- a/freedreno/freedreno_priv.h
+++ b/freedreno/freedreno_priv.h
@@ -139,6 +139,7 @@ struct fd_bo {
 	uint32_t size;
 	uint32_t handle;
 	uint32_t name;
+	int fd;          /* dmabuf handle */
 	void *map;
 	atomic_t refcnt;
 	struct fd_bo_funcs *funcs;