This series does the same thing as my earlier series in that it adds a sync object wait interface complete with WAIT_FOR_SUBMIT flag. While the uapi remains unchanged, the guts look a bit different. Instead of adding a callback mechanism to drm_syncobj that fired whenever replace_fence was called, it's now using proxy fences. The drm_syncobj_fence_get still returns NULL whenever the sync object is in an unsubmitted state but there is a new drm_syncobj_fence_proxy_get which returns either the real fence or a proxy fence that will be triggered the next time replace_fence is called with a non-NULL replacement. This does make both drm_syncobj_fence_get and drm_syncobj_replace_fence a tiny bit more expensive, but it lets us do it all without locking.
This series can be found as a branch here:
https://cgit.freedesktop.org/~jekstrand/linux/log/?h=drm-syncobj-wait-submit...
IGT tests for DRM_IOCTL_SYNCOBJ_WAIT and DRM_IOCTL_SYNCOBJ_RESET can be found on patchwork here:
https://patchwork.freedesktop.org/series/28666/
Patches to the Intel Vulkan driver to implement VK_KHR_external_fence on top of this kernel interface can be found here:
https://cgit.freedesktop.org/~jekstrand/mesa/log/?h=wip/anv-external-fence
Cc: Dave Airlie airlied@redhat.com Cc: Chris Wilson chris@chris-wilson.co.uk Cc: Christian König christian.koenig@amd.com
Chris Wilson (2): dma-buf/dma-fence: Signal all callbacks from dma_fence_release() dma-buf/dma-fence: Add a mechanism for proxy fences
Dave Airlie (1): drm/syncobj: add sync obj wait interface. (v8)
Jason Ekstrand (6): drm/syncobj: Rename fence_get to find_fence drm/syncobj: Add a race-free drm_syncobj_fence_get helper i915: Add support for drm syncobjs dma-buf/dma-fence: Allow wait_any_timeout without default_wait (v2) drm/syncobj: Add a reset ioctl drm/syncobj: Allow wait for submit and signal behavior (v4)
drivers/dma-buf/Makefile | 4 +- drivers/dma-buf/dma-fence-proxy.c | 186 +++++++++++++++++++ drivers/dma-buf/dma-fence.c | 34 ++-- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 +- drivers/gpu/drm/drm_internal.h | 4 + drivers/gpu/drm/drm_ioctl.c | 4 + drivers/gpu/drm/drm_syncobj.c | 275 +++++++++++++++++++++++++++-- drivers/gpu/drm/i915/i915_drv.c | 3 +- drivers/gpu/drm/i915/i915_gem_execbuffer.c | 146 ++++++++++++++- include/drm/drm_syncobj.h | 15 +- include/linux/dma-fence-proxy.h | 25 +++ include/uapi/drm/drm.h | 19 ++ include/uapi/drm/i915_drm.h | 30 +++- 13 files changed, 710 insertions(+), 37 deletions(-) create mode 100644 drivers/dma-buf/dma-fence-proxy.c create mode 100644 include/linux/dma-fence-proxy.h