Messages in this thread Patch in this message | | | From | John Stultz <> | Subject | [RFC][PATCH 3/4] dma-buf: cma_heap: Extend logic to export CMA regions tagged with "linux,cma-heap" | Date | Fri, 1 May 2020 07:39:48 +0000 |
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This patch reworks the cma_heap initialization so that we expose both the default CMA region and any CMA regions tagged with "linux,cma-heap" in the device-tree.
Cc: Rob Herring <robh+dt@kernel.org> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: "Andrew F. Davis" <afd@ti.com> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org> Cc: Liam Mark <lmark@codeaurora.org> Cc: Pratik Patel <pratikp@codeaurora.org> Cc: Laura Abbott <labbott@redhat.com> Cc: Brian Starkey <Brian.Starkey@arm.com> Cc: Chenbo Feng <fengc@google.com> Cc: Alistair Strachan <astrachan@google.com> Cc: Sandeep Patil <sspatil@google.com> Cc: Hridya Valsaraju <hridya@google.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: devicetree@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: linux-mm@kvack.org Signed-off-by: John Stultz <john.stultz@linaro.org> --- drivers/dma-buf/heaps/cma_heap.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c index 626cf7fd033a..dd154e2db101 100644 --- a/drivers/dma-buf/heaps/cma_heap.c +++ b/drivers/dma-buf/heaps/cma_heap.c @@ -141,6 +141,11 @@ static int __add_cma_heap(struct cma *cma, void *data) { struct cma_heap *cma_heap; struct dma_heap_export_info exp_info; + struct cma *default_cma = dev_get_cma_area(NULL); + + /* We only add the default heap and explicitly tagged heaps */ + if (cma != default_cma && !cma_dma_heap_enabled(cma)) + return 0; cma_heap = kzalloc(sizeof(*cma_heap), GFP_KERNEL); if (!cma_heap) @@ -162,16 +167,11 @@ static int __add_cma_heap(struct cma *cma, void *data) return 0; } -static int add_default_cma_heap(void) +static int cma_heaps_init(void) { - struct cma *default_cma = dev_get_cma_area(NULL); - int ret = 0; - - if (default_cma) - ret = __add_cma_heap(default_cma, NULL); - - return ret; + cma_for_each_area(__add_cma_heap, NULL); + return 0; } -module_init(add_default_cma_heap); +module_init(cma_heaps_init); MODULE_DESCRIPTION("DMA-BUF CMA Heap"); MODULE_LICENSE("GPL v2"); -- 2.17.1
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