On Fri, Jul 15, 2022 at 9:53 AM Dmitry Osipenko dmitry.osipenko@collabora.com wrote:
Hello,
This series moves all drivers to a dynamic dma-buf locking specification. From now on all dma-buf importers are made responsible for holding dma-buf's reservation lock around all operations performed over dma-bufs. This common locking convention allows us to utilize reservation lock more broadly around kernel without fearing of potential dead locks.
This patchset passes all i915 selftests. It was also tested using VirtIO, Panfrost, Lima and Tegra drivers. I tested cases of display+GPU, display+V4L and GPU+V4L dma-buf sharing, which covers majority of kernel drivers since rest of the drivers share same or similar code paths.
This is a continuation of [1] where Christian König asked to factor out the dma-buf locking changes into separate series.
[1] https://lore.kernel.org/dri-devel/20220526235040.678984-1-dmitry.osipenko@co...
Dmitry Osipenko (6): dma-buf: Add _unlocked postfix to function names drm/gem: Take reservation lock for vmap/vunmap operations dma-buf: Move all dma-bufs to dynamic locking specification dma-buf: Acquire wait-wound context on attachment media: videobuf2: Stop using internal dma-buf lock dma-buf: Remove internal lock
drivers/dma-buf/dma-buf.c | 198 +++++++++++------- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 4 +- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 +- drivers/gpu/drm/armada/armada_gem.c | 14 +- drivers/gpu/drm/drm_client.c | 4 +- drivers/gpu/drm/drm_gem.c | 28 +++ drivers/gpu/drm/drm_gem_cma_helper.c | 6 +- drivers/gpu/drm/drm_gem_framebuffer_helper.c | 6 +- drivers/gpu/drm/drm_gem_shmem_helper.c | 6 +- drivers/gpu/drm/drm_prime.c | 12 +- drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 6 +- drivers/gpu/drm/exynos/exynos_drm_gem.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 20 +- .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_object.h | 6 +- .../drm/i915/gem/selftests/i915_gem_dmabuf.c | 20 +- drivers/gpu/drm/i915/i915_gem_evict.c | 2 +- drivers/gpu/drm/i915/i915_gem_ww.c | 26 ++- drivers/gpu/drm/i915/i915_gem_ww.h | 15 +- drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 8 +- drivers/gpu/drm/qxl/qxl_object.c | 17 +- drivers/gpu/drm/qxl/qxl_prime.c | 4 +- drivers/gpu/drm/tegra/gem.c | 27 +-- drivers/infiniband/core/umem_dmabuf.c | 11 +- .../common/videobuf2/videobuf2-dma-contig.c | 26 +-- .../media/common/videobuf2/videobuf2-dma-sg.c | 23 +- .../common/videobuf2/videobuf2-vmalloc.c | 17 +-
For the videobuf2 changes:
Acked-by: Tomasz Figa tfiga@chromium.org
Best regards, Tomasz