From 3690951fc6d42f3a0903987677d0e592c49dd8db Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Thu, 27 Feb 2014 12:24:57 +0000 Subject: [PATCH] arm64: Use swiotlb late initialisation Since arm64 does not support ISA, there is no need for early swiotlb initialisation. This patch switches the DMA mapping code to swiotlb_tlb_late_init_with_default_size(). A side effect of this is that GFP_DMA is used for the swiotlb buffer and devices with a 32-bit coherent mask are correctly supported. Signed-off-by: Catalin Marinas --- arch/arm64/mm/dma-mapping.c | 10 ++++++++-- arch/arm64/mm/init.c | 2 -- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index 26b2512c1fcd..afa91a26a72b 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -93,11 +93,17 @@ static struct dma_map_ops coherent_swiotlb_dma_ops = { .mapping_error = swiotlb_dma_mapping_error, }; -void __init arm64_swiotlb_init(void) +extern int swiotlb_late_init_with_default_size(size_t default_size); + +static int __init swiotlb_late_init(void) { + size_t swiotlb_size = min(SZ_64M, MAX_ORDER_NR_PAGES << PAGE_SHIFT); + dma_ops = &coherent_swiotlb_dma_ops; - swiotlb_init(1); + + return swiotlb_late_init_with_default_size(swiotlb_size); } +subsys_initcall(swiotlb_late_init); #define PREALLOC_DMA_DEBUG_ENTRIES 4096 diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index a61a4d560d12..88627c450a6c 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -262,8 +262,6 @@ static void __init free_unused_memmap(void) */ void __init mem_init(void) { - arm64_swiotlb_init(); - max_mapnr = pfn_to_page(max_pfn + PHYS_PFN_OFFSET) - mem_map; #ifndef CONFIG_SPARSEMEM_VMEMMAP -- GitLab