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/[email protected]/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 <[email protected]> Cc: Sumit Semwal <[email protected]> Cc: "Andrew F. Davis" <[email protected]> Cc: Benjamin Gaignard <[email protected]> Cc: Liam Mark <[email protected]> Cc: Pratik Patel <[email protected]> Cc: Laura Abbott <[email protected]> Cc: Brian Starkey <[email protected]> Cc: Chenbo Feng <[email protected]> Cc: Alistair Strachan <[email protected]> Cc: Sandeep Patil <[email protected]> Cc: Hridya Valsaraju <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: Marek Szyprowski <[email protected]> Cc: Robin Murphy <[email protected]> Cc: Andrew Morton <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] 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
