From f802d969b6a89d3f9b67ef879179824d53420ebe Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Thu, 9 Apr 2009 10:36:54 -0700 Subject: sh: Add support for DMA API debugging. This wires up support for the generic DMA API debugging. Signed-off-by: Paul Mundt --- arch/sh/mm/consistent.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'arch/sh/mm/consistent.c') diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c index edcd5fbf9651..8c9ee855328a 100644 --- a/arch/sh/mm/consistent.c +++ b/arch/sh/mm/consistent.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -45,6 +46,9 @@ void *dma_alloc_coherent(struct device *dev, size_t size, split_page(pfn_to_page(virt_to_phys(ret) >> PAGE_SHIFT), order); *dma_handle = virt_to_phys(ret); + + debug_dma_alloc_coherent(dev, size, *dma_handle, ret_nocache); + return ret_nocache; } EXPORT_SYMBOL(dma_alloc_coherent); @@ -56,12 +60,15 @@ void dma_free_coherent(struct device *dev, size_t size, unsigned long pfn = dma_handle >> PAGE_SHIFT; int k; - if (!dma_release_from_coherent(dev, order, vaddr)) { - WARN_ON(irqs_disabled()); /* for portability */ - for (k = 0; k < (1 << order); k++) - __free_pages(pfn_to_page(pfn + k), 0); - iounmap(vaddr); - } + WARN_ON(irqs_disabled()); /* for portability */ + + if (dma_release_from_coherent(dev, order, vaddr)) + return; + + debug_dma_free_coherent(dev, size, vaddr, dma_handle); + for (k = 0; k < (1 << order); k++) + __free_pages(pfn_to_page(pfn + k), 0); + iounmap(vaddr); } EXPORT_SYMBOL(dma_free_coherent); -- cgit v1.2.1 From 7b41f5688c1e03c41c772cd1766d6d80189380dd Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Tue, 14 Apr 2009 15:22:15 +0900 Subject: sh: Pre-allocate a reasonable number of DMA debug entries. This prevents the DMA API debugging from running out of entries right away on boot. Defines 4096 entries by default, which while a bit on the heavy side, ought to leave enough breathing room for some time. Signed-off-by: Paul Mundt --- arch/sh/mm/consistent.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'arch/sh/mm/consistent.c') diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c index 8c9ee855328a..e098ec158ddb 100644 --- a/arch/sh/mm/consistent.c +++ b/arch/sh/mm/consistent.c @@ -10,12 +10,22 @@ * for more details. */ #include +#include #include #include #include +#include #include #include -#include + +#define PREALLOC_DMA_DEBUG_ENTRIES 4096 + +static int __init dma_init(void) +{ + dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES); + return 0; +} +fs_initcall(dma_init); void *dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp) -- cgit v1.2.1