This patch set implements the MSM_WAIT_IOVA ioctl which lets userspace sleep until the value at a given iova reaches a certain condition. This is needed in turnip to implement the VK_QUERY_RESULT_WAIT_BIT flag for vkGetQueryPoolResults. First, we add a GPU-wide wait queue that is signaled on all IRQs. We can then wait on this wait queue inside MSM_WAIT_IOVA until the condition is met. The corresponding merge request in mesa can be found at: https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3279 Changes in v2: * Updated cleanup logic on error * Added a mask * 32 bit values by default Changes in v3: * Fixed a bug where the mask was being applied incorrectly Brian Ho (2): drm/msm: Add a GPU-wide wait queue drm/msm: Add MSM_WAIT_IOVA ioctl drivers/gpu/drm/msm/msm_drv.c | 61 +++++++++++++++++++++++++++++++++-- drivers/gpu/drm/msm/msm_gpu.c | 4 +++ drivers/gpu/drm/msm/msm_gpu.h | 3 ++ include/uapi/drm/msm_drm.h | 14 ++++++++ 4 files changed, 80 insertions(+), 2 deletions(-) -- 2.25.0.341.g760bfbb309-goog _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
