Doug / smarc-fsl-linux-kernel

27 Aug, 2013

1 commit

  • a25473803   drivers: dma-contiguous: clean source code and prepare for device tree ... Browse Code »

    This patch cleans the initialization of dma contiguous framework. The
    all-in-one dma_declare_contiguous() function is now separated into
    dma_contiguous_reserve_area() which only steals the the memory from
    memblock allocator and dma_contiguous_add_device() function, which
    assigns given device to the specified reserved memory area. This improves
    the flexibility in defining contiguous memory areas and assigning device
    to them, because now it is possible to assign more than one device to
    the given contiguous memory area. Such split in initialization procedure
    is also required for upcoming device tree support.

    Signed-off-by: Marek Szyprowski
    Acked-by: Kyungmin Park
    Acked-by: Michal Nazarewicz
    Acked-by: Tomasz Figa

    Marek Szyprowski
     

02 Jul, 2013

1 commit

  • f825c736e   mm/cma: Move dma contiguous changes into a seperate config ... Browse Code »

    We want to use CMA for allocating hash page table and real mode area for
    PPC64. Hence move DMA contiguous related changes into a seperate config
    so that ppc64 can enable CMA without requiring DMA contiguous.

    Acked-by: Michal Nazarewicz
    Acked-by: Paul Mackerras
    Signed-off-by: Aneesh Kumar K.V
    [removed defconfig changes]
    Signed-off-by: Marek Szyprowski

    Aneesh Kumar K.V
     

21 May, 2012

1 commit

  • c79095092   ARM: integrate CMA with DMA-mapping subsystem ... Browse Code »

    This patch adds support for CMA to dma-mapping subsystem for ARM
    architecture. By default a global CMA area is used, but specific devices
    are allowed to have their private memory areas if required (they can be
    created with dma_declare_contiguous() function during board
    initialisation).

    Contiguous memory areas reserved for DMA are remapped with 2-level page
    tables on boot. Once a buffer is requested, a low memory kernel mapping
    is updated to to match requested memory access type.

    GFP_ATOMIC allocations are performed from special pool which is created
    early during boot. This way remapping page attributes is not needed on
    allocation time.

    CMA has been enabled unconditionally for ARMv6+ systems.

    Signed-off-by: Marek Szyprowski
    Signed-off-by: Kyungmin Park
    CC: Michal Nazarewicz
    Acked-by: Arnd Bergmann
    Tested-by: Rob Clark
    Tested-by: Ohad Ben-Cohen
    Tested-by: Benjamin Gaignard
    Tested-by: Robert Nelson
    Tested-by: Barry Song

    Marek Szyprowski