iio: new DMABUF based API [LWN.net]

From:		Paul Cercueil <paul-AT-crapouillou.net>
To:		Jonathan Cameron <jic23-AT-kernel.org>, Christian König <christian.koenig-AT-amd.com>, Jonathan Corbet <corbet-AT-lwn.net>, Lars-Peter Clausen <lars-AT-metafoo.de>, Vinod Koul <vkoul-AT-kernel.org>, Sumit Semwal <sumit.semwal-AT-linaro.org>
Subject:		[PATCH v8 0/6] iio: new DMABUF based API
Date:		Fri, 08 Mar 2024 18:00:40 +0100
Message-ID:		<20240308170046.92899-1-paul@crapouillou.net>
Cc:		Nuno Sa <nuno.sa-AT-analog.com>, Michael Hennerich <michael.hennerich-AT-analog.com>, linux-doc-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, dmaengine-AT-vger.kernel.org, linux-iio-AT-vger.kernel.org, linux-media-AT-vger.kernel.org, dri-devel-AT-lists.freedesktop.org, linaro-mm-sig-AT-lists.linaro.org, Paul Cercueil <paul-AT-crapouillou.net>
Archive-link:		Article

Hi Jonathan,

Here's the final(tm) version of the IIO DMABUF patchset.

This v8 fixes the remaining few issues that Christian reported.

I also updated the documentation patch as there has been changes to
index.rst.

This was based on next-20240308.

Changelog:

- [3/6]:
    - Fix swapped fence direction
    - Simplify fence wait mechanism
    - Remove "Buffer closed with active transfers" print, as it was dead
      code
    - Un-export iio_buffer_dmabuf_{get,put}. They are not used anywhere
      else so they can even be static.
    - Prevent attaching already-attached DMABUFs
- [6/6]:
    Renamed dmabuf_api.rst -> iio_dmabuf_api.rst, and updated index.rst
    whose format changed in iio/togreg.

Cheers,
-Paul

Paul Cercueil (6):
  dmaengine: Add API function dmaengine_prep_peripheral_dma_vec()
  dmaengine: dma-axi-dmac: Implement device_prep_peripheral_dma_vec
  iio: core: Add new DMABUF interface infrastructure
  iio: buffer-dma: Enable support for DMABUFs
  iio: buffer-dmaengine: Support new DMABUF based userspace API
  Documentation: iio: Document high-speed DMABUF based API

 Documentation/iio/iio_dmabuf_api.rst          |  54 ++
 Documentation/iio/index.rst                   |   1 +
 drivers/dma/dma-axi-dmac.c                    |  40 ++
 drivers/iio/buffer/industrialio-buffer-dma.c  | 181 ++++++-
 .../buffer/industrialio-buffer-dmaengine.c    |  59 ++-
 drivers/iio/industrialio-buffer.c             | 462 ++++++++++++++++++
 include/linux/dmaengine.h                     |  27 +
 include/linux/iio/buffer-dma.h                |  31 ++
 include/linux/iio/buffer_impl.h               |  30 ++
 include/uapi/linux/iio/buffer.h               |  22 +
 10 files changed, 890 insertions(+), 17 deletions(-)
 create mode 100644 Documentation/iio/iio_dmabuf_api.rst

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2.43.0