OpenCloudOS-Kernel/include
Simon Ser c7a4722971 drm/syncobj: add IOCTL to register an eventfd
Introduce a new DRM_IOCTL_SYNCOBJ_EVENTFD IOCTL which signals an
eventfd from a syncobj.

This is useful for Wayland compositors to handle wait-before-submit.
Wayland clients can send a timeline point to the compositor
before the point has materialized yet, then compositors can wait
for the point to materialize via this new IOCTL.

The existing DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT IOCTL is not suitable
because it blocks. Compositors want to integrate the wait with
their poll(2)-based event loop.

Requirements for new uAPI:

- User-space patch: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4262
- IGT: https://lists.freedesktop.org/archives/igt-dev/2023-July/057893.html

v2:
- Wait for fence when flags is zero
- Improve documentation (Pekka)
- Rename IOCTL (Christian)
- Fix typo in drm_syncobj_add_eventfd() (Christian)

v3:
- Link user-space + IGT patches
- Add reference from overview docs

v4: fix IOCTL number conflict with GETFB2 (Nicholas Choi, Vitaly Prosyak)

Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Cc: Daniel Stone <daniel@fooishbar.org>
Cc: James Jones <jajones@nvidia.com>
Cc: Austin Shafer <ashafer@nvidia.com>
Cc: Vitaly Prosyak <vprosyak@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230714111257.11940-1-contact@emersion.fr
2023-07-20 12:01:03 +02:00
..
acpi Power management updates for 6.4-rc1 2023-04-25 18:44:10 -07:00
asm-generic Linux 6.4-rc7 2023-06-19 16:01:25 +10:00
clocksource
crypto This update includes the following changes: 2023-04-26 08:32:52 -07:00
drm drm/syncobj: add IOCTL to register an eventfd 2023-07-20 12:01:03 +02:00
dt-bindings dt-bindings: power: qcom,rpmpd: Add SA8155P 2023-05-24 20:34:49 -07:00
keys
kunit
kvm s390: 2023-05-01 12:06:20 -07:00
linux sysfb: Do not include <linux/screen_info.h> from sysfb header 2023-07-08 20:26:39 +02:00
math-emu
media Revert "media: dvb-core: Fix use-after-free on race condition at dvb_frontend" 2023-06-14 23:16:29 +01:00
memory
misc
net net/sched: qdisc_destroy() old ingress and clsact Qdiscs before grafting 2023-06-14 10:31:39 +02:00
pcmcia
ras
rdma RDMA/cma: Always set static rate to 0 for RoCE 2023-06-11 11:26:02 +03:00
rv
scsi Driver core changes for 6.4-rc1 2023-04-27 11:53:57 -07:00
soc Nothing looks out of the ordinary in this batch of clk driver updates. There 2023-04-29 17:29:39 -07:00
sound ASoC: Intel: avs: Account for UID of ACPI device 2023-05-22 11:18:24 +01:00
target scsi: target: iscsi: Remove unused transport_timer 2023-05-22 16:29:39 -04:00
trace NFSD 6.4 Release Notes 2023-04-29 11:04:14 -07:00
uapi drm/syncobj: add IOCTL to register an eventfd 2023-07-20 12:01:03 +02:00
ufs scsi: ufs: core: Rename symbol sizeof_utp_transfer_cmd_desc() 2023-05-16 21:07:26 -04:00
vdso
video arch/parisc: Implement fb_is_primary_device() under arch/parisc 2023-04-20 10:04:58 +02:00
xen