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Date: Fri, 21 Nov 2008 17:26:08 +0100 From: Joerg Roedel <joerg.roedel@....com> To: Ingo Molnar <mingo@...hat.com>, Thomas Gleixner <tglx@...utronix.de> CC: linux-kernel@...r.kernel.org, netdev@...r.kernel.org, iommu@...ts.linux-foundation.org, Joerg Roedel <joerg.roedel@....com> Subject: [PATCH 08/10] x86: add checks for sync_single* code Impact: detect bugs in sync_single* usage Signed-off-by: Joerg Roedel <joerg.roedel@....com> --- arch/x86/include/asm/dma-mapping.h | 2 ++ arch/x86/include/asm/dma_debug.h | 20 ++++++++++++++++++++ arch/x86/kernel/pci-dma-debug.c | 14 ++++++++++++++ 3 files changed, 36 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index 2893adb..63bed40 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -158,6 +158,7 @@ dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle, BUG_ON(!valid_dma_direction(direction)); if (ops->sync_single_for_cpu) ops->sync_single_for_cpu(hwdev, dma_handle, size, direction); + debug_sync_single_for_cpu(hwdev, dma_handle, size, direction); flush_write_buffers(); } @@ -170,6 +171,7 @@ dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle, BUG_ON(!valid_dma_direction(direction)); if (ops->sync_single_for_device) ops->sync_single_for_device(hwdev, dma_handle, size, direction); + debug_sync_single_for_device(hwdev, dma_handle, size, direction); flush_write_buffers(); } diff --git a/arch/x86/include/asm/dma_debug.h b/arch/x86/include/asm/dma_debug.h index 7245e27..8262cd1 100644 --- a/arch/x86/include/asm/dma_debug.h +++ b/arch/x86/include/asm/dma_debug.h @@ -67,6 +67,14 @@ extern void debug_free_coherent(struct device *dev, size_t size, void *virt, dma_addr_t addr); +extern +void debug_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, + size_t size, int direction); + +extern +void debug_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, + size_t size, int direction); + #else /* CONFIG_DMA_API_DEBUG */ static inline @@ -110,6 +118,18 @@ void debug_free_coherent(struct device *dev, size_t size, { } +static inline +void debug_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, + size_t size, int direction) +{ +} + +static inline +void debug_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, + size_t size, int direction) +{ +} + #endif /* CONFIG_DMA_API_DEBUG */ #endif /* __ASM_X86_DMA_DEBUG */ diff --git a/arch/x86/kernel/pci-dma-debug.c b/arch/x86/kernel/pci-dma-debug.c index db5ef9a..1dfcd33 100644 --- a/arch/x86/kernel/pci-dma-debug.c +++ b/arch/x86/kernel/pci-dma-debug.c @@ -408,3 +408,17 @@ void debug_free_coherent(struct device *dev, size_t size, } EXPORT_SYMBOL(debug_free_coherent); +void debug_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, + size_t size, int direction) +{ + check_sync(dev, dma_handle, size, 0, direction, true); +} +EXPORT_SYMBOL(debug_sync_single_for_cpu); + +void debug_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, + size_t size, int direction) +{ + check_sync(dev, dma_handle, size, 0, direction, false); +} +EXPORT_SYMBOL(debug_sync_single_for_device); + -- 1.5.6.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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