From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: [PATCH 11/16] dma-debug: add checking for [alloc|free]_coherent Date: Fri, 9 Jan 2009 17:19:25 +0100 Message-ID: <1231517970-20288-12-git-send-email-joerg.roedel@amd.com> References: <1231517970-20288-1-git-send-email-joerg.roedel@amd.com> Mime-Version: 1.0 Content-Type: text/plain Cc: mingo@redhat.com, dwmw2@infradead.org, fujita.tomonori@lab.ntt.co.jp, netdev@vger.kernel.org, iommu@lists.linux-foundation.org, Joerg Roedel To: linux-kernel@vger.kernel.org Return-path: Received: from outbound-va3.frontbridge.com ([216.32.180.16]:36347 "EHLO VA3EHSOBE005.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752385AbZAIQTp (ORCPT ); Fri, 9 Jan 2009 11:19:45 -0500 In-Reply-To: <1231517970-20288-1-git-send-email-joerg.roedel@amd.com> Sender: netdev-owner@vger.kernel.org List-ID: Impact: add debug callbacks for dma_[alloc|free]_coherent Signed-off-by: Joerg Roedel --- include/linux/dma-debug.h | 16 ++++++++++++++++ lib/dma-debug.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 61 insertions(+), 0 deletions(-) diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h index b2131f4..a28a701 100644 --- a/include/linux/dma-debug.h +++ b/include/linux/dma-debug.h @@ -40,6 +40,12 @@ extern void debug_map_sg(struct device *dev, struct scatterlist *sg, extern void debug_unmap_sg(struct device *dev, struct scatterlist *sglist, int nelems, int dir); +extern void debug_alloc_coherent(struct device *dev, size_t size, + dma_addr_t dma_addr, void *virt); + +extern void debug_free_coherent(struct device *dev, size_t size, + void *virt, dma_addr_t addr); + #else /* CONFIG_DMA_API_DEBUG */ static inline void dma_debug_init(u32 num_entries) @@ -68,6 +74,16 @@ static inline void debug_unmap_sg(struct device *dev, { } +static inline void debug_alloc_coherent(struct device *dev, size_t size, + dma_addr_t dma_addr, void *virt) +{ +} + +static inline void debug_free_coherent(struct device *dev, size_t size, + void *virt, dma_addr_t addr) +{ +} + #endif /* CONFIG_DMA_API_DEBUG */ #endif /* __DMA_DEBUG_H */ diff --git a/lib/dma-debug.c b/lib/dma-debug.c index e6d45f9..a4a5b0f 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -604,3 +604,48 @@ void debug_unmap_sg(struct device *dev, struct scatterlist *sglist, } EXPORT_SYMBOL(debug_unmap_sg); +void debug_alloc_coherent(struct device *dev, size_t size, + dma_addr_t dma_addr, void *virt) +{ + struct dma_debug_entry *entry; + + if (global_disable) + return; + + if (dma_addr == bad_dma_address) + return; + + entry = dma_entry_alloc(); + if (!entry) + return; + + entry->type = dma_debug_coherent; + entry->dev = dev; + entry->cpu_addr = virt; + entry->size = size; + entry->dev_addr = dma_addr; + entry->direction = DMA_BIDIRECTIONAL; + + add_dma_entry(entry); +} +EXPORT_SYMBOL(debug_alloc_coherent); + +void debug_free_coherent(struct device *dev, size_t size, + void *virt, dma_addr_t addr) +{ + struct dma_debug_entry ref = { + .type = dma_debug_coherent, + .dev = dev, + .cpu_addr = virt, + .dev_addr = addr, + .size = size, + .direction = DMA_BIDIRECTIONAL, + }; + + if (global_disable) + return; + + check_unmap(&ref); +} +EXPORT_SYMBOL(debug_free_coherent); + -- 1.5.6.4