On Tue, 20 May 2025 at 03:54, Rob Clark <robdcl...@gmail.com> wrote: > > From: Rob Clark <robdcl...@chromium.org> > > Conversion to DRM GPU VA Manager[1], and adding support for Vulkan Sparse > Memory[2] in the form of: > > 1. A new VM_BIND submitqueue type for executing VM MSM_SUBMIT_BO_OP_MAP/ > MAP_NULL/UNMAP commands > > 2. A new VM_BIND ioctl to allow submitting batches of one or more > MAP/MAP_NULL/UNMAP commands to a VM_BIND submitqueue > > I did not implement support for synchronous VM_BIND commands. Since > userspace could just immediately wait for the `SUBMIT` to complete, I don't > think we need this extra complexity in the kernel. Synchronous/immediate > VM_BIND operations could be implemented with a 2nd VM_BIND submitqueue.
This seems suboptimal for Vulkan userspaces. non-sparse binds are all synchronous, you are adding an extra ioctl to wait, or do you manage these via a different mechanism? Dave.
