Am 31.03.25 um 23:23 schrieb Rob Clark: > From: Rob Clark <[email protected]> > > Add support for exporting a dma_fence fd for a specific point on a > timeline. This is needed for vtest/vpipe[1][2] to implement timeline > syncobj support, as it needs a way to turn a point on a timeline back > into a dma_fence fd. It also closes an odd omission from the syncobj > UAPI. > > [1] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33433 > [2] https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/805 > > v2: Add DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_TIMELINE > v3: Add unstaged uabi header hunk > v4: Also handle IMPORT_SYNC_FILE case > v5: Address comments from Dmitry > > Signed-off-by: Rob Clark <[email protected]> > --- > drivers/gpu/drm/drm_syncobj.c | 45 +++++++++++++++++++++++++++-------- > include/uapi/drm/drm.h | 4 ++++ > 2 files changed, 39 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c > index 4f2ab8a7b50f..b0a4c58fe726 100644 > --- a/drivers/gpu/drm/drm_syncobj.c > +++ b/drivers/gpu/drm/drm_syncobj.c > @@ -741,7 +741,7 @@ static int drm_syncobj_fd_to_handle(struct drm_file > *file_private, > } > > static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private, > - int fd, int handle) > + int fd, int handle, u64 point) > { > struct dma_fence *fence = sync_file_get_fence(fd); > struct drm_syncobj *syncobj; > @@ -755,14 +755,22 @@ static int drm_syncobj_import_sync_file_fence(struct > drm_file *file_private, > return -ENOENT; > } > > - drm_syncobj_replace_fence(syncobj, fence); > + if (point) { > + struct dma_fence_chain *chain = dma_fence_chain_alloc(); > + if (!chain) > + return -ENOMEM; > + drm_syncobj_add_point(syncobj, chain, fence, point);
Just a nit pick but checkpatch.pl will complain about it: Empty line between declaration and code please. Maybe double check if checpatch.pl is otherwise happy with the patch. With that done feel free to add Reviewed-by: Christian König <[email protected]>. Let me know if I should push it to drm-misc-next. Regards, Christian. > + } else { > + drm_syncobj_replace_fence(syncobj, fence); > + } > + > dma_fence_put(fence); > drm_syncobj_put(syncobj); > return 0; > } > > 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 +780,7 @@ 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; > > @@ -869,6 +877,9 @@ drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, > void *data, > struct drm_file *file_private) > { > struct drm_syncobj_handle *args = data; > + unsigned valid_flags = DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_TIMELINE | > + DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE; > + u64 point = 0; > > if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) > return -EOPNOTSUPP; > @@ -876,13 +887,18 @@ drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, > void *data, > if (args->pad) > return -EINVAL; > > - if (args->flags != 0 && > - args->flags != DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE) > + if (args->flags & ~valid_flags) > return -EINVAL; > > + if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_TIMELINE) > + point = args->point; > + > if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE) > return drm_syncobj_export_sync_file(file_private, args->handle, > - &args->fd); > + point, &args->fd); > + > + if (args->point) > + return -EINVAL; > > return drm_syncobj_handle_to_fd(file_private, args->handle, > &args->fd); > @@ -893,6 +909,9 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, > void *data, > struct drm_file *file_private) > { > struct drm_syncobj_handle *args = data; > + unsigned valid_flags = DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_TIMELINE | > + DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE; > + u64 point = 0; > > if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) > return -EOPNOTSUPP; > @@ -900,14 +919,20 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, > void *data, > if (args->pad) > return -EINVAL; > > - if (args->flags != 0 && > - args->flags != DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE) > + if (args->flags & ~valid_flags) > return -EINVAL; > > + if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_TIMELINE) > + point = args->point; > + > if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE) > return drm_syncobj_import_sync_file_fence(file_private, > args->fd, > - args->handle); > + args->handle, > + point); > + > + if (args->point) > + return -EINVAL; > > return drm_syncobj_fd_to_handle(file_private, args->fd, > &args->handle); > diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h > index 7fba37b94401..e63a71d3c607 100644 > --- a/include/uapi/drm/drm.h > +++ b/include/uapi/drm/drm.h > @@ -905,13 +905,17 @@ struct drm_syncobj_destroy { > }; > > #define DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE (1 << 0) > +#define DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_TIMELINE (1 << 1) > #define DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE (1 << 0) > +#define DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_TIMELINE (1 << 1) > struct drm_syncobj_handle { > __u32 handle; > __u32 flags; > > __s32 fd; > __u32 pad; > + > + __u64 point; > }; > > struct drm_syncobj_transfer {
