[PATCH] drm/syncobj: Extend EXPORT_SYNC_FILE for timeline syncobjs

[Rob Clark]

From: Rob Clark <robdcl...@chromium.org>

Add support for exporting a dma_fence fd for a specific point on a
timeline.

Signed-off-by: Rob Clark <robdcl...@chromium.org>
---
 drivers/gpu/drm/drm_syncobj.c | 8 ++++++--
 include/uapi/drm/drm.h        | 2 ++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 4f2ab8a7b50f..eb7a2dd2e261 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -762,7 +762,7 @@ static int drm_syncobj_import_sync_file_fence(struct 
drm_file *file_private,
 }
 
 static int drm_syncobj_export_sync_file(struct drm_file *file_private,
-                                       int handle, int *p_fd)
+                                       int handle, u64 point, int *p_fd)
 {
        int ret;
        struct dma_fence *fence;
@@ -772,7 +772,7 @@ static int drm_syncobj_export_sync_file(struct drm_file 
*file_private,
        if (fd < 0)
                return fd;
 
-       ret = drm_syncobj_find_fence(file_private, handle, 0, 0, &fence);
+       ret = drm_syncobj_find_fence(file_private, handle, point, 0, &fence);
        if (ret)
                goto err_put_fd;
 
@@ -882,8 +882,12 @@ drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, 
void *data,
 
        if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE)
                return drm_syncobj_export_sync_file(file_private, args->handle,
+                                                   args->point,
                                                    &args->fd);
 
+       if (args->point)
+               return -EINVAL;
+
        return drm_syncobj_handle_to_fd(file_private, args->handle,
                                        &args->fd);
 }
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 7fba37b94401..c71a8f4439f2 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -912,6 +912,8 @@ struct drm_syncobj_handle {
 
        __s32 fd;
        __u32 pad;
+
+       __u64 point;
 };
 
 struct drm_syncobj_transfer {
-- 
2.49.0