[PATCHv9 00/25] Integration of videobuf2 with DMABUF
Hans Verkuil
hverkuil at xs4all.nl
Sun Oct 7 03:03:52 PDT 2012
Hi all!
On Tue October 2 2012 16:27:11 Tomasz Stanislawski wrote:
> Hello everyone,
> This patchset adds support for DMABUF [2] importing and exporting to V4L2
> stack.
I see that there is a lot of interest to getting this into 3.7. I understand
that, but IMHO this is a bit too soon. I would like to see the review comments
I made for v9 addressed, and more importantly, I would *really* like to see
mem2mem_testdev.c be dmabuf aware. One of the problems today is that it is
hard to test this, but if vivi and mem2mem_testdev can do dmabuf, then it is
easy to setup a pipeline that everyone can use for testing and application
development without requiring special hardware.
My suggestion would be to get a v10 out, and merge that as soon as the for_v3.8
branch opens. Then get mem2mem_testdev ready for dmabuf as well for 3.8.
Regards,
Hans
>
> v9:
> - rebase on 3.6
> - change type for fs to __s32
> - add support for vb2_ioctl_expbuf
> - remove patch 'v4l: vb2: add support for DMA_ATTR_NO_KERNEL_MAPPING',
> it will be posted as a separate patch
> - fix typos and style in Documentation (from Hans Verkuil)
> - only vb2-core and vb2-dma-contig selects DMA_SHARED_BUFFER in Kconfig
> - use data_offset and length while queueing DMABUF
> - return the most recently used fd at VIDIOC_DQBUF
> - use (buffer-type, index, plane) tuple instead of mem_offset
> to identify a for exporting (from Hans Verkuil)
> - support for DMABUF mmap in vb2-dma-contig (from Laurent Pinchart)
> - add testing alignment of vaddr and size while verifying userptr
> against DMA capabilities (from Laurent Pinchart)
> - substitute VM_DONTDUMP with VM_RESERVED
> - simplify error handling in vb2_dc_get_dmabuf (from Laurent Pinchart)
>
> v8:
> - rebased on 3.6-rc1
> - merged importer and exporter patchsets
> - fixed missing fields in v4l2_plane32 and v4l2_buffer32 structs
> - fixed typos/style in documentation
> - significant reduction of warnings from checkpatch.pl
> - fixed STREAMOFF issues reported by Dima Zavin [4] by adding
> __vb2_dqbuf helper to vb2-core
> - DC fails if userptr is not correctly aligned
> - add support for DMA attributes in DC
> - add support for buffers with no kernel mapping
> - add reference counting on device from allocator context
> - dummy support for mmap
> - use dma_get_sgtable, drop vb2_dc_kaddr_to_pages hack and
> vb2_dc_get_base_sgt helper
>
> v7:
> - support for V4L2_MEMORY_DMABUF in v4l2-compact-ioctl32.c
> - cosmetic fixes to the documentation
> - added importing for vmalloc because vmap support in dmabuf for 3.5
> was pull-requested
> - support for dmabuf importing for VIVI
> - resurrect allocation of dma-contig context
> - remove reference of alloc_ctx in dma-contig buffer
> - use sg_alloc_table_from_pages
> - fix DMA scatterlist calls to use orig_nents instead of nents
> - fix memleak in vb2_dc_sgt_foreach_page (use orig_nents instead of nents)
>
> v6:
> - fixed missing entry in v4l2_memory_names
> - fixed a bug occuring after get_user_pages failure
> - fixed a bug caused by using invalid vma for get_user_pages
> - prepare/finish no longer call dma_sync for dmabuf buffers
>
> v5:
> - removed change of importer/exporter behaviour
> - fixes vb2_dc_pages_to_sgt basing on Laurent's hints
> - changed pin/unpin words to lock/unlock in Doc
>
> v4:
> - rebased on mainline 3.4-rc2
> - included missing importing support for s5p-fimc and s5p-tv
> - added patch for changing map/unmap for importers
> - fixes to Documentation part
> - coding style fixes
> - pairing {map/unmap}_dmabuf in vb2-core
> - fixing variable types and semantic of arguments in videobufb2-dma-contig.c
>
> v3:
> - rebased on mainline 3.4-rc1
> - split 'code refactor' patch to multiple smaller patches
> - squashed fixes to Sumit's patches
> - patchset is no longer dependant on 'DMA mapping redesign'
> - separated path for handling IO and non-IO mappings
> - add documentation for DMABUF importing to V4L
> - removed all DMABUF exporter related code
> - removed usage of dma_get_pages extension
>
> v2:
> - extended VIDIOC_EXPBUF argument from integer memoffset to struct
> v4l2_exportbuffer
> - added patch that breaks DMABUF spec on (un)map_atachment callcacks but allows
> to work with existing implementation of DMABUF prime in DRM
> - all dma-contig code refactoring patches were squashed
> - bugfixes
>
> v1: List of changes since [1].
> - support for DMA api extension dma_get_pages, the function is used to retrieve
> pages used to create DMA mapping.
> - small fixes/code cleanup to videobuf2
> - added prepare and finish callbacks to vb2 allocators, it is used keep
> consistency between dma-cpu acess to the memory (by Marek Szyprowski)
> - support for exporting of DMABUF buffer in V4L2 and Videobuf2, originated from
> [3].
> - support for dma-buf exporting in vb2-dma-contig allocator
> - support for DMABUF for s5p-tv and s5p-fimc (capture interface) drivers,
> originated from [3]
> - changed handling for userptr buffers (by Marek Szyprowski, Andrzej
> Pietrasiewicz)
> - let mmap method to use dma_mmap_writecombine call (by Marek Szyprowski)
>
> [1] http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/42966/focus=42968
> [2] https://lkml.org/lkml/2011/12/26/29
> [3] http://thread.gmane.org/gmane.linux.kernel.cross-arch/12819
> [4] http://article.gmane.org/gmane.linux.drivers.video-input-infrastructure/49700
>
> Laurent Pinchart (2):
> v4l: vb2-dma-contig: shorten vb2_dma_contig prefix to vb2_dc
> v4l: vb2-dma-contig: reorder functions
>
> Marek Szyprowski (4):
> v4l: vb2: add prepare/finish callbacks to allocators
> v4l: vb2-dma-contig: add prepare/finish to dma-contig allocator
> v4l: vb2-dma-contig: let mmap method to use dma_mmap_coherent call
> v4l: vb2-dma-contig: fail if user ptr buffer is not correctly aligned
>
> Sumit Semwal (4):
> v4l: Add DMABUF as a memory type
> v4l: vb2: add support for shared buffer (dma_buf)
> v4l: vb: remove warnings about MEMORY_DMABUF
> v4l: vb2-dma-contig: add support for dma_buf importing
>
> Tomasz Stanislawski (15):
> Documentation: media: description of DMABUF importing in V4L2
> v4l: vb2-dma-contig: remove reference of alloc_ctx from a buffer
> v4l: vb2-dma-contig: add support for scatterlist in userptr mode
> v4l: vb2-vmalloc: add support for dmabuf importing
> v4l: vivi: support for dmabuf importing
> v4l: s5p-tv: mixer: support for dmabuf importing
> v4l: s5p-fimc: support for dmabuf importing
> Documentation: media: description of DMABUF exporting in V4L2
> v4l: add buffer exporting via dmabuf
> v4l: vb2: add buffer exporting via dmabuf
> v4l: vb2-dma-contig: add support for DMABUF exporting
> v4l: vb2-dma-contig: add reference counting for a device from
> allocator context
> v4l: s5p-fimc: support for dmabuf exporting
> v4l: s5p-tv: mixer: support for dmabuf exporting
> v4l: s5p-mfc: support for dmabuf exporting
>
> Documentation/DocBook/media/v4l/compat.xml | 7 +
> Documentation/DocBook/media/v4l/io.xml | 183 +++++-
> Documentation/DocBook/media/v4l/v4l2.xml | 1 +
> .../DocBook/media/v4l/vidioc-create-bufs.xml | 16 +-
> Documentation/DocBook/media/v4l/vidioc-expbuf.xml | 212 ++++++
> Documentation/DocBook/media/v4l/vidioc-qbuf.xml | 17 +
> Documentation/DocBook/media/v4l/vidioc-reqbufs.xml | 47 +-
> drivers/media/video/Kconfig | 2 +
> drivers/media/video/s5p-fimc/fimc-capture.c | 11 +-
> drivers/media/video/s5p-mfc/s5p_mfc_dec.c | 14 +
> drivers/media/video/s5p-mfc/s5p_mfc_enc.c | 14 +
> drivers/media/video/s5p-tv/mixer_video.c | 12 +-
> drivers/media/video/v4l2-compat-ioctl32.c | 19 +
> drivers/media/video/v4l2-dev.c | 1 +
> drivers/media/video/v4l2-ioctl.c | 11 +
> drivers/media/video/videobuf-core.c | 4 +
> drivers/media/video/videobuf2-core.c | 300 ++++++++-
> drivers/media/video/videobuf2-dma-contig.c | 695 ++++++++++++++++++--
> drivers/media/video/videobuf2-memops.c | 40 --
> drivers/media/video/videobuf2-vmalloc.c | 56 ++
> drivers/media/video/vivi.c | 2 +-
> include/linux/videodev2.h | 35 +
> include/media/v4l2-ioctl.h | 2 +
> include/media/videobuf2-core.h | 38 ++
> include/media/videobuf2-memops.h | 5 -
> 25 files changed, 1608 insertions(+), 136 deletions(-)
> create mode 100644 Documentation/DocBook/media/v4l/vidioc-expbuf.xml
>
>
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