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Date: Fri, 28 Jan 2022 09:41:14 +0100
From: Christian König <christian.koenig@....com>
To: Lucas De Marchi <lucas.demarchi@...el.com>,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Cc: srinivas.kandagatla@...aro.org, gregkh@...uxfoundation.org,
sumit.semwal@...aro.org, daniel.vetter@...ll.ch, airlied@...ux.ie,
lyude@...hat.com, tzimmermann@...e.de, linux-media@...r.kernel.org,
nouveau@...ts.freedesktop.org
Subject: Re: [PATCH 00/14] Rename dma-buf-map
Rule #1 is to never ever break the build.
Because of this all those patches needs to be squashed into a single one
as far as I can see.
Regards,
Christian.
Am 28.01.22 um 09:36 schrieb Lucas De Marchi:
> Motivation for this started in
> https://lore.kernel.org/lkml/20220126203702.1784589-1-lucas.demarchi@intel.com/
> when trying to extend the dma-buf-map API to cover new use cases: help a
> single driver with allocations and sharing code paths for IO and system
> memory. I'm leaving the API additions aside and first renaming the
> interface as requested.
>
> There are already some users in tree outside the context of dma-buf
> importer/exporter. So before extending the API, let's dissociate it from
> dma-buf.
>
> The iosys-map.h is introduced in the first patch in a way that allows
> the conversion of each driver to happen separately. After all the
> conversions are done we can remove the old one, which is the last patch.
> Another possible way is to squash everything and merge together,
> but I believe this would make much harder for review.
>
> The conversion was done with the following semantic patch:
>
> @r1@
> @@
> - struct dma_buf_map
> + struct iosys_map
>
> @r2@
> @@
> (
> - DMA_BUF_MAP_INIT_VADDR
> + IOSYS_MAP_INIT_VADDR
> |
> - dma_buf_map_set_vaddr
> + iosys_map_set_vaddr
> |
> - dma_buf_map_set_vaddr_iomem
> + iosys_map_set_vaddr_iomem
> |
> - dma_buf_map_is_equal
> + iosys_map_is_equal
> |
> - dma_buf_map_is_null
> + iosys_map_is_null
> |
> - dma_buf_map_is_set
> + iosys_map_is_set
> |
> - dma_buf_map_clear
> + iosys_map_clear
> |
> - dma_buf_map_memcpy_to
> + iosys_map_memcpy_to
> |
> - dma_buf_map_incr
> + iosys_map_incr
> )
>
> @@
> @@
> - #include <linux/dma-buf-map.h>
> + #include <linux/iosys-map.h>
>
> and then some files had their includes adjusted so we can build
> everything on each commit in this series. Also some comments were update
> to remove mentions to dma-buf-map. Simply doing a sed to rename didn't
> work as dma-buf has some APIs using the dma_buf_map prefix.
>
> Once finalized, I think most of this, if not all, could go through the
> drm-misc-next branch. I split i915, msm, nouveau, and radeon in their
> own patches in case it's preferred to take those through their own
> trees.
>
> Lucas De Marchi
>
> Lucas De Marchi (14):
> iosys-map: Introduce renamed dma-buf-map
> misc: fastrpc: Replace dma-buf-map with iosys-map
> dma-buf: Replace dma-buf-map with iosys-map
> media: Replace dma-buf-map with iosys-map
> drm/ttm: Replace dma-buf-map with iosys-map
> drm: Replace dma-buf-map with iosys-map in drivers
> drm/i915: Replace dma-buf-map with iosys-map
> drm/msm: Replace dma-buf-map with iosys-map
> drm/nouveau: Replace dma-buf-map with iosys-map
> drm/tegra: Replace dma-buf-map with iosys-map
> drm/radeon: Replace dma-buf-map with iosys-map
> drm: Replace dma-buf-map with iosys-map in common code
> Documentation: Refer to iosys-map instead of dma-buf-map
> dma-buf-map: Remove API in favor of iosys-map
>
> Documentation/driver-api/dma-buf.rst | 4 +-
> Documentation/gpu/todo.rst | 20 +-
> MAINTAINERS | 2 +-
> drivers/dma-buf/dma-buf.c | 22 +-
> drivers/dma-buf/heaps/cma_heap.c | 10 +-
> drivers/dma-buf/heaps/system_heap.c | 10 +-
> drivers/gpu/drm/ast/ast_drv.h | 2 +-
> drivers/gpu/drm/ast/ast_mode.c | 8 +-
> drivers/gpu/drm/drm_cache.c | 18 +-
> drivers/gpu/drm/drm_client.c | 9 +-
> drivers/gpu/drm/drm_fb_helper.c | 12 +-
> drivers/gpu/drm/drm_gem.c | 12 +-
> drivers/gpu/drm/drm_gem_cma_helper.c | 9 +-
> drivers/gpu/drm/drm_gem_framebuffer_helper.c | 16 +-
> drivers/gpu/drm/drm_gem_shmem_helper.c | 15 +-
> drivers/gpu/drm/drm_gem_ttm_helper.c | 4 +-
> drivers/gpu/drm/drm_gem_vram_helper.c | 25 +-
> drivers/gpu/drm/drm_internal.h | 6 +-
> drivers/gpu/drm/drm_mipi_dbi.c | 8 +-
> drivers/gpu/drm/drm_prime.c | 4 +-
> drivers/gpu/drm/etnaviv/etnaviv_drv.h | 2 +-
> drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 8 +-
> drivers/gpu/drm/gud/gud_pipe.c | 4 +-
> drivers/gpu/drm/hyperv/hyperv_drm_modeset.c | 5 +-
> drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 8 +-
> .../drm/i915/gem/selftests/i915_gem_dmabuf.c | 6 +-
> .../gpu/drm/i915/gem/selftests/mock_dmabuf.c | 6 +-
> drivers/gpu/drm/lima/lima_gem.c | 3 +-
> drivers/gpu/drm/lima/lima_sched.c | 4 +-
> drivers/gpu/drm/mediatek/mtk_drm_gem.c | 7 +-
> drivers/gpu/drm/mediatek/mtk_drm_gem.h | 5 +-
> drivers/gpu/drm/mgag200/mgag200_mode.c | 4 +-
> drivers/gpu/drm/msm/msm_drv.h | 4 +-
> drivers/gpu/drm/msm/msm_gem_prime.c | 6 +-
> drivers/gpu/drm/nouveau/nouveau_gem.c | 2 +
> drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 13 +-
> drivers/gpu/drm/qxl/qxl_display.c | 8 +-
> drivers/gpu/drm/qxl/qxl_draw.c | 6 +-
> drivers/gpu/drm/qxl/qxl_drv.h | 10 +-
> drivers/gpu/drm/qxl/qxl_object.c | 8 +-
> drivers/gpu/drm/qxl/qxl_object.h | 4 +-
> drivers/gpu/drm/qxl/qxl_prime.c | 4 +-
> drivers/gpu/drm/radeon/radeon_gem.c | 1 +
> drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 9 +-
> drivers/gpu/drm/rockchip/rockchip_drm_gem.h | 5 +-
> drivers/gpu/drm/tegra/gem.c | 10 +-
> drivers/gpu/drm/tiny/cirrus.c | 8 +-
> drivers/gpu/drm/tiny/gm12u320.c | 7 +-
> drivers/gpu/drm/ttm/ttm_bo_util.c | 16 +-
> drivers/gpu/drm/ttm/ttm_resource.c | 26 +-
> drivers/gpu/drm/ttm/ttm_tt.c | 6 +-
> drivers/gpu/drm/udl/udl_modeset.c | 3 +-
> drivers/gpu/drm/vboxvideo/vbox_mode.c | 4 +-
> drivers/gpu/drm/virtio/virtgpu_prime.c | 1 +
> drivers/gpu/drm/vkms/vkms_composer.c | 4 +-
> drivers/gpu/drm/vkms/vkms_drv.h | 6 +-
> drivers/gpu/drm/vkms/vkms_plane.c | 2 +-
> drivers/gpu/drm/vkms/vkms_writeback.c | 2 +-
> drivers/gpu/drm/xen/xen_drm_front_gem.c | 7 +-
> drivers/gpu/drm/xen/xen_drm_front_gem.h | 6 +-
> .../common/videobuf2/videobuf2-dma-contig.c | 8 +-
> .../media/common/videobuf2/videobuf2-dma-sg.c | 9 +-
> .../common/videobuf2/videobuf2-vmalloc.c | 11 +-
> drivers/misc/fastrpc.c | 4 +-
> include/drm/drm_cache.h | 6 +-
> include/drm/drm_client.h | 7 +-
> include/drm/drm_gem.h | 6 +-
> include/drm/drm_gem_atomic_helper.h | 6 +-
> include/drm/drm_gem_cma_helper.h | 6 +-
> include/drm/drm_gem_framebuffer_helper.h | 8 +-
> include/drm/drm_gem_shmem_helper.h | 12 +-
> include/drm/drm_gem_ttm_helper.h | 6 +-
> include/drm/drm_gem_vram_helper.h | 9 +-
> include/drm/drm_prime.h | 6 +-
> include/drm/ttm/ttm_bo_api.h | 10 +-
> include/drm/ttm/ttm_kmap_iter.h | 10 +-
> include/drm/ttm/ttm_resource.h | 6 +-
> include/linux/dma-buf-map.h | 266 ------------------
> include/linux/dma-buf.h | 12 +-
> include/linux/iosys-map.h | 257 +++++++++++++++++
> 80 files changed, 579 insertions(+), 552 deletions(-)
> delete mode 100644 include/linux/dma-buf-map.h
> create mode 100644 include/linux/iosys-map.h
>
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