* [PATCH v4] drm/syncobj: Extend EXPORT_SYNC_FILE for timeline syncobjs
@ 2025-03-27 21:36 Rob Clark
2025-03-28 0:48 ` Dmitry Osipenko
0 siblings, 1 reply; 2+ messages in thread
From: Rob Clark @ 2025-03-27 21:36 UTC (permalink / raw)
To: dri-devel
Cc: Christian König, Dmitry Osipenko, Rob Clark,
Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann,
David Airlie, Simona Vetter, Sumit Semwal, open list,
open list:DMA BUFFER SHARING
FRAMEWORK:Keyword:bdma_(?:buf|fence|resv)b,
moderated list:DMA BUFFER SHARING
FRAMEWORK:Keyword:bdma_(?:buf|fence|resv)b
From: Rob Clark <robdclark@chromium.org>
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
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
drivers/gpu/drm/drm_syncobj.c | 41 ++++++++++++++++++++++++++---------
include/uapi/drm/drm.h | 4 ++++
2 files changed, 35 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 4f2ab8a7b50f..58d8a9035f7d 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 +755,18 @@ static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private,
return -ENOENT;
}
- drm_syncobj_replace_fence(syncobj, fence);
+ if (point) {
+ drm_syncobj_add_point(syncobj, dma_fence_chain_alloc(), fence, point);
+ } 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 +776,7 @@ 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 +873,9 @@ 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 +883,18 @@ 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 != 0 && (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 +905,9 @@ 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 +915,20 @@ 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 != 0 && (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 {
--
2.49.0
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH v4] drm/syncobj: Extend EXPORT_SYNC_FILE for timeline syncobjs
2025-03-27 21:36 [PATCH v4] drm/syncobj: Extend EXPORT_SYNC_FILE for timeline syncobjs Rob Clark
@ 2025-03-28 0:48 ` Dmitry Osipenko
0 siblings, 0 replies; 2+ messages in thread
From: Dmitry Osipenko @ 2025-03-28 0:48 UTC (permalink / raw)
To: Rob Clark, dri-devel
Cc: Christian König, Rob Clark, Maarten Lankhorst,
Maxime Ripard, Thomas Zimmermann, David Airlie, Simona Vetter,
Sumit Semwal, open list,
open list:DMA BUFFER SHARING
FRAMEWORK:Keyword:bdma_(?:buf|fence|resv)b,
moderated list:DMA BUFFER SHARING
FRAMEWORK:Keyword:bdma_(?:buf|fence|resv)b
On 3/28/25 00:36, Rob Clark wrote:
...
> 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 +755,18 @@ static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private,
> return -ENOENT;
> }
>
> - drm_syncobj_replace_fence(syncobj, fence);
> + if (point) {
> + drm_syncobj_add_point(syncobj, dma_fence_chain_alloc(), fence, point);
Nit: check dma_fence_chain_alloc() for ENOMEM
> + } else {
> + drm_syncobj_replace_fence(syncobj, fence);
> + }
Nit: checkpath should complain about the unnecessary braces
> 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 +776,7 @@ 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 +873,9 @@ 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 +883,18 @@ 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 != 0 && (args->flags & ~valid_flags))
> return -EINVAL;
Nit: args->flags!=0 not needed as (0 & ~valid_flags) is always false,
same for import
...
--
Best regards,
Dmitry
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2025-03-28 0:49 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2025-03-27 21:36 [PATCH v4] drm/syncobj: Extend EXPORT_SYNC_FILE for timeline syncobjs Rob Clark
2025-03-28 0:48 ` Dmitry Osipenko
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®