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    Subject[RESEND][PATCH v16 0/5] DMA-BUF Heaps (destaging ION)
    Date
    Just wanted to resend v16.

    This patchset implements per-heap devices which can be opened
    directly and then an ioctl is used to allocate a dmabuf from the
    heap.

    The interface is similar, but much simpler then IONs, only
    providing an ALLOC ioctl.

    Also, I've provided relatively simple system and cma heaps.

    I've booted and tested these patches with AOSP on the HiKey960
    using the kernel tree here:
    https://git.linaro.org/people/john.stultz/android-dev.git/log/?h=dev/dma-buf-heap

    And the reviewed (+2'ed) userspace changes here:
    https://android-review.googlesource.com/c/device/linaro/hikey/+/909436

    Compared to ION, this patchset is missing the system-contig,
    carveout and chunk heaps, as I don't have a device that uses
    those, so I'm unable to do much useful validation there.
    Additionally we have no upstream users of chunk or carveout,
    and the system-contig has been deprecated in the common/andoid-*
    kernels, so this should be ok.

    I've also removed the stats accounting, since any such
    accounting should be implemented by dma-buf core or the heaps
    themselves.

    New in v16:
    * Typo fix suggested by Hridya Valsaraju <hridya@google.com>
    * Add extra error and ioctl compatibility testing suggested by
    Daniel Vetter to the kselftest test

    Thanks again for all the reviews and feedback!
    -john

    Cc: Laura Abbott <labbott@redhat.com>
    Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
    Cc: Sumit Semwal <sumit.semwal@linaro.org>
    Cc: Liam Mark <lmark@codeaurora.org>
    Cc: Pratik Patel <pratikp@codeaurora.org>
    Cc: Brian Starkey <Brian.Starkey@arm.com>
    Cc: Vincent Donnefort <Vincent.Donnefort@arm.com>
    Cc: Sudipto Paul <Sudipto.Paul@arm.com>
    Cc: Andrew F. Davis <afd@ti.com>
    Cc: Christoph Hellwig <hch@infradead.org>
    Cc: Chenbo Feng <fengc@google.com>
    Cc: Alistair Strachan <astrachan@google.com>
    Cc: Hridya Valsaraju <hridya@google.com>
    Cc: Sandeep Patil <sspatil@google.com>
    Cc: Hillf Danton <hdanton@sina.com>
    Cc: Dave Airlie <airlied@gmail.com>
    Cc: dri-devel@lists.freedesktop.org

    Andrew F. Davis (1):
    dma-buf: Add dma-buf heaps framework

    John Stultz (4):
    dma-buf: heaps: Add heap helpers
    dma-buf: heaps: Add system heap to dmabuf heaps
    dma-buf: heaps: Add CMA heap to dmabuf heaps
    kselftests: Add dma-heap test

    MAINTAINERS | 18 +
    drivers/dma-buf/Kconfig | 11 +
    drivers/dma-buf/Makefile | 2 +
    drivers/dma-buf/dma-heap.c | 297 +++++++++++++
    drivers/dma-buf/heaps/Kconfig | 14 +
    drivers/dma-buf/heaps/Makefile | 4 +
    drivers/dma-buf/heaps/cma_heap.c | 177 ++++++++
    drivers/dma-buf/heaps/heap-helpers.c | 271 ++++++++++++
    drivers/dma-buf/heaps/heap-helpers.h | 53 +++
    drivers/dma-buf/heaps/system_heap.c | 123 ++++++
    include/linux/dma-heap.h | 59 +++
    include/uapi/linux/dma-heap.h | 53 +++
    tools/testing/selftests/dmabuf-heaps/Makefile | 6 +
    .../selftests/dmabuf-heaps/dmabuf-heap.c | 396 ++++++++++++++++++
    14 files changed, 1484 insertions(+)
    create mode 100644 drivers/dma-buf/dma-heap.c
    create mode 100644 drivers/dma-buf/heaps/Kconfig
    create mode 100644 drivers/dma-buf/heaps/Makefile
    create mode 100644 drivers/dma-buf/heaps/cma_heap.c
    create mode 100644 drivers/dma-buf/heaps/heap-helpers.c
    create mode 100644 drivers/dma-buf/heaps/heap-helpers.h
    create mode 100644 drivers/dma-buf/heaps/system_heap.c
    create mode 100644 include/linux/dma-heap.h
    create mode 100644 include/uapi/linux/dma-heap.h
    create mode 100644 tools/testing/selftests/dmabuf-heaps/Makefile
    create mode 100644 tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c

    --
    2.17.1

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