Le mardi 17 novembre 2020 à 10:19 -0800, Minchan Kim a écrit : > This patchset introduces a new dma heap, chunk heap that makes it > easy to perform the bulk allocation of high order pages. > It has been created to help optimize the 4K/8K HDR video playback > with secure DRM HW to protect contents on memory. The HW needs > physically contiguous memory chunks up to several hundred MB memory. > > The chunk heap is registered by device tree with alignment and memory > node of Contiguous Memory Allocator(CMA). Alignment defines chunk page size. > For example, alignment 0x1_0000 means chunk page size is 64KB. > The phandle to memory node indicates contiguous memory allocator(CMA). > If device node doesn't have cma, the registration of chunk heap fails. > > This patchset is against on next-20201110. I believe you have forgot to reference Open Source / Upstream code using this. regards, Nicolas > > The patchset includes the following: > - cma_alloc_bulk API > - export dma-heap API to register kernel module dma heap. > - add chunk heap implementation. > - devicetree > > Hyesoo Yu (3): > dma-buf: add export symbol for dma-heap > dma-buf: heaps: add chunk heap to dmabuf heaps > dma-heap: Devicetree binding for chunk heap > > Minchan Kim (1): > mm: introduce cma_alloc_bulk API > > .../bindings/dma-buf/chunk_heap.yaml | 52 ++ > drivers/dma-buf/dma-heap.c | 2 + > drivers/dma-buf/heaps/Kconfig | 9 + > drivers/dma-buf/heaps/Makefile | 1 + > drivers/dma-buf/heaps/chunk_heap.c | 458 ++++++++++++++++++ > include/linux/cma.h | 5 + > include/linux/page-isolation.h | 1 + > mm/cma.c | 129 ++++- > mm/page_alloc.c | 19 +- > mm/page_isolation.c | 3 +- > 10 files changed, 666 insertions(+), 13 deletions(-) > create mode 100644 Documentation/devicetree/bindings/dma-buf/chunk_heap.yaml > create mode 100644 drivers/dma-buf/heaps/chunk_heap.c >
