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This creates a new command submission chunk for amdgpu to add in and out sync objects around the submission. Sync objects are managed via the drm syncobj ioctls. The command submission interface is enhanced with two new chunks, one for syncobj pre submission dependencies, and one for post submission sync obj signalling, and just takes a list of handles for each. This is based on work originally done by David Zhou at AMD, with input from Christian Konig on what things should look like. In theory VkFences could be backed with sync objects and just get passed into the cs as syncobj handles as well. NOTE: this interface addition needs a version bump to expose it to userspace. TODO: update to dep_sync when rebasing onto amdgpu master. (with this - r-b from Christian) v1.1: keep file reference on import. v2: move to using syncobjs v2.1: change some APIs to just use p pointer. v3: make more robust against CS failures, we now add the wait sems but only remove them once the CS job has been submitted. v4: rewrite names of API and base on new syncobj code. v5: move post deps earlier, rename some apis v6: lookup post deps earlier, and just replace fences in post deps stage (Christian) Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.