iio: new DMABUF based API v12

From:		Paul Cercueil <paul-AT-crapouillou.net>
To:		Jonathan Cameron <jic23-AT-kernel.org>, Lars-Peter Clausen <lars-AT-metafoo.de>, Vinod Koul <vkoul-AT-kernel.org>, Sumit Semwal <sumit.semwal-AT-linaro.org>, Christian König <christian.koenig-AT-amd.com>
Subject:		[PATCH v12 0/7] iio: new DMABUF based API v12
Date:		Thu, 20 Jun 2024 14:27:19 +0200
Message-ID:		<20240620122726.41232-1-paul@crapouillou.net>
Cc:		Jonathan Corbet <corbet-AT-lwn.net>, Nuno Sa <nuno.sa-AT-analog.com>, linux-iio-AT-vger.kernel.org, linux-doc-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, dmaengine-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 v12 of my patchset that introduces DMABUF support to IIO.

Apart from a small documentation fix, it reverts to using
mutex_lock/mutex_unlock in one particular place, which used cleanup
GOTOs (which don't play well with scope-managed cleanups).

Changelog:
- [3/7]:
    - Revert to mutex_lock/mutex_unlock in iio_buffer_attach_dmabuf(),
      as it uses cleanup GOTOs
- [6/7]:
    - "obtained using..." -> "which can be obtained using..."

This is based on next-20240619.

Cheers,
-Paul

Paul Cercueil (7):
  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: dmaengine: Document new dma_vec API

 Documentation/driver-api/dmaengine/client.rst |   9 +
 .../driver-api/dmaengine/provider.rst         |  10 +
 Documentation/iio/iio_dmabuf_api.rst          |  54 +++
 Documentation/iio/index.rst                   |   1 +
 drivers/dma/dma-axi-dmac.c                    |  40 ++
 drivers/iio/Kconfig                           |   1 +
 drivers/iio/buffer/industrialio-buffer-dma.c  | 178 ++++++-
 .../buffer/industrialio-buffer-dmaengine.c    |  62 ++-
 drivers/iio/industrialio-buffer.c             | 459 ++++++++++++++++++
 include/linux/dmaengine.h                     |  33 ++
 include/linux/iio/buffer-dma.h                |  31 ++
 include/linux/iio/buffer_impl.h               |  33 ++
 include/uapi/linux/iio/buffer.h               |  22 +
 13 files changed, 913 insertions(+), 20 deletions(-)
 create mode 100644 Documentation/iio/iio_dmabuf_api.rst

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2.43.0