From c80d9133e99de1af607314107910a2a1645efb17 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Sat, 11 Nov 2006 17:25:16 +1100 Subject: [PATCH] [POWERPC] Make direct DMA use node local allocations This patch makes dma_alloc_coherent() use node local allocation when using the direct DMA ops. The node is obtained from the new device extension. If no such extension is present, the current node is used. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/dma_64.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/kernel/dma_64.c b/arch/powerpc/kernel/dma_64.c index 1d1dc76606..7b0e754383 100644 --- a/arch/powerpc/kernel/dma_64.c +++ b/arch/powerpc/kernel/dma_64.c @@ -120,14 +120,18 @@ unsigned long dma_direct_offset; static void *dma_direct_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag) { + struct page *page; void *ret; + int node = dev->archdata.numa_node; /* TODO: Maybe use the numa node here too ? */ - ret = (void *)__get_free_pages(flag, get_order(size)); - if (ret != NULL) { - memset(ret, 0, size); - *dma_handle = virt_to_abs(ret) | dma_direct_offset; - } + page = alloc_pages_node(node, flag, get_order(size)); + if (page == NULL) + return NULL; + ret = page_address(page); + memset(ret, 0, size); + *dma_handle = virt_to_abs(ret) | dma_direct_offset; + return ret; } -- 2.39.5