linux-kernel - [PATCH 0/8] videobuf2: support new noncontiguous DMA API

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Date:   Tue,  2 Mar 2021 09:46:16 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Tomasz Figa <tfiga@...omium.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>
Cc:     Christoph Hellwig <hch@....de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: [PATCH 0/8] videobuf2: support new noncontiguous DMA API

Hello,

	RFC

	The series adds support for new noncontiguous DMA API [0] and
adds V4L2_FLAG_MEMORY_NON_COHERENT UAPI. This is similar to previous
V4L2_FLAG_MEMORY_NON_CONSISTENT (which was renamed), but the patch set
goes a bit further this time and also does some videobuf2 API
refactroings along the way.

A corresponding v4l2-compliance patch will be posted shortly.

[0] https://lore.kernel.org/lkml/20210301085236.947011-2-hch@lst.de/

Sergey Senozhatsky (8):
  videobuf2: rework vb2_mem_ops API
  videobuf2: inverse buffer cache_hints flags
  videobuf2: split buffer cache_hints initialisation
  videobuf2: move cache_hints handling to allocators
  videobuf2: add V4L2_FLAG_MEMORY_NON_COHERENT flag
  videobuf2: add queue memory coherency parameter
  videobuf2: handle V4L2_FLAG_MEMORY_NON_COHERENT flag
  videobuf2: handle non-contiguous DMA allocations

 .../userspace-api/media/v4l/buffer.rst        |  40 +++-
 .../media/v4l/vidioc-create-bufs.rst          |   7 +-
 .../media/v4l/vidioc-reqbufs.rst              |  16 +-
 .../media/common/videobuf2/videobuf2-core.c   | 135 +++++++++-----
 .../common/videobuf2/videobuf2-dma-contig.c   | 175 ++++++++++++++----
 .../media/common/videobuf2/videobuf2-dma-sg.c |  39 ++--
 .../media/common/videobuf2/videobuf2-v4l2.c   |  47 ++---
 .../common/videobuf2/videobuf2-vmalloc.c      |  30 +--
 drivers/media/dvb-core/dvb_vb2.c              |   2 +-
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   9 +-
 drivers/media/v4l2-core/v4l2-ioctl.c          |   5 +-
 include/media/videobuf2-core.h                |  57 +++---
 include/uapi/linux/videodev2.h                |  13 +-
 13 files changed, 396 insertions(+), 179 deletions(-)

-- 
2.30.1.766.gb4fecdf3b7-goog