This series implements cached maps and explicit flushing for both panfrost and panthor.
The PanVK MR to use this lives here: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36385 This version moves away from the code sharing proposed at the drm_prime/gem_shmem level and hand-roll a bunch of things that could potentially be shared. The goal here is to take the path of least resistance and discuss this controversial code-sharing topic in a follow-up MR. Keeping everyone Cc-ed on the previous version involved, so they're aware of this change of direction, sorry for the noise if you don't care :-/. Changes in v2: - Expose the coherency so userspace can know when it should skip cache maintenance - Hook things up at drm_gem_object_funcs level to dma-buf cpu_prep hooks can be implemented generically - Revisit the semantics of the flags passed to gem_sync() - Add BO_QUERY_INFO ioctls to query BO flags on imported objects and let the UMD know when cache maintenance is needed on those Changes in v3: - New patch to fix panthor_gpu_coherency_set() - No other major changes, check each patch changelog for more details Changes in v4: - Two trivial fixes, check each patch changelog for more details Changes in v5: - Add a way to overload dma_buf_ops while still relying on the drm_prime boilerplate - Add default shmem implementation for dma_buf_ops::{begin,end}_cpu_access() - Provide custom dma_buf_ops to deal with CPU cache flushes around CPU accesses when the BO is CPU-cacheable - Go back to a version of drm_gem_shmem_sync() that only deals with cache maintenance, and adjust the semantics to make it clear this is the only thing it cares about - Adjust the BO_SYNC ioctls according to the new drm_gem_shmem_sync() semantics Changes in v6: - No major changes, check the changelog in each patch for more details Changes in v7: - Drop the drm_prime/gem_shmem helpers and duplicate the logic in panthor/panfrost Boris Brezillon (8): drm/panthor: Provide a custom dma_buf implementation drm/panthor: Fix panthor_gpu_coherency_set() drm/panthor: Expose the selected coherency protocol to the UMD drm/panthor: Add a PANTHOR_BO_SYNC ioctl drm/panthor: Add an ioctl to query BO flags drm/panfrost: Provide a custom dma_buf implementation drm/panfrost: Expose the selected coherency protocol to the UMD drm/panfrost: Add an ioctl to query BO flags Faith Ekstrand (4): drm/panthor: Bump the driver version to 1.6 drm/panfrost: Add a PANFROST_SYNC_BO ioctl drm/panfrost: Add flag to map GEM object Write-Back Cacheable drm/panfrost: Bump the driver version to 1.6 Loïc Molinari (1): drm/panthor: Add flag to map GEM object Write-Back Cacheable drivers/gpu/drm/panfrost/panfrost_device.h | 1 + drivers/gpu/drm/panfrost/panfrost_drv.c | 101 ++++++++- drivers/gpu/drm/panfrost/panfrost_gem.c | 240 +++++++++++++++++++++ drivers/gpu/drm/panfrost/panfrost_gem.h | 10 + drivers/gpu/drm/panfrost/panfrost_gpu.c | 26 ++- drivers/gpu/drm/panfrost/panfrost_regs.h | 10 +- drivers/gpu/drm/panthor/panthor_device.c | 10 +- drivers/gpu/drm/panthor/panthor_drv.c | 79 ++++++- drivers/gpu/drm/panthor/panthor_gem.c | 240 ++++++++++++++++++++- drivers/gpu/drm/panthor/panthor_gem.h | 6 + drivers/gpu/drm/panthor/panthor_gpu.c | 2 +- drivers/gpu/drm/panthor/panthor_sched.c | 18 +- include/uapi/drm/panfrost_drm.h | 76 ++++++- include/uapi/drm/panthor_drm.h | 157 +++++++++++++- 14 files changed, 954 insertions(+), 22 deletions(-) -- 2.51.1
