This is a much belated second stab at allowing non-default CMA regions to be exposed via the dmabuf heaps interface.
Previous attempt was here: https://lore.kernel.org/lkml/20191025225009.50305-2-john.stu...@linaro.org/T/ This pass tried to take Rob's earlier suggestion to use a flag property. Feedback would be greatly welcome! thanks -john Cc: Rob Herring <robh...@kernel.org> Cc: Sumit Semwal <sumit.sem...@linaro.org> Cc: "Andrew F. Davis" <a...@ti.com> Cc: Benjamin Gaignard <benjamin.gaign...@linaro.org> Cc: Liam Mark <lm...@codeaurora.org> Cc: Pratik Patel <prat...@codeaurora.org> Cc: Laura Abbott <labb...@redhat.com> Cc: Brian Starkey <brian.star...@arm.com> Cc: Chenbo Feng <fe...@google.com> Cc: Alistair Strachan <astrac...@google.com> Cc: Sandeep Patil <sspa...@google.com> Cc: Hridya Valsaraju <hri...@google.com> Cc: Christoph Hellwig <h...@lst.de> Cc: Marek Szyprowski <m.szyprow...@samsung.com> Cc: Robin Murphy <robin.mur...@arm.com> Cc: Andrew Morton <a...@linux-foundation.org> Cc: devicet...@vger.kernel.org Cc: dri-de...@lists.freedesktop.org Cc: linux...@kvack.org John Stultz (4): devicetree: bindings: Add linux,cma-heap tag for reserved memory mm: cma: Add dma_heap flag to cma structure dma-buf: cma_heap: Extend logic to export CMA regions tagged with "linux,cma-heap" example: dts: hi3660-hikey960: Add dts entries to test cma heap binding .../reserved-memory/reserved-memory.txt | 3 +++ .../boot/dts/hisilicon/hi3660-hikey960.dts | 7 +++++++ drivers/dma-buf/heaps/cma_heap.c | 18 +++++++++--------- include/linux/cma.h | 3 +++ kernel/dma/contiguous.c | 3 +++ mm/cma.c | 11 +++++++++++ mm/cma.h | 1 + 7 files changed, 37 insertions(+), 9 deletions(-) -- 2.17.1
