Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754993AbZCFNcf (ORCPT ); Fri, 6 Mar 2009 08:32:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754350AbZCFNav (ORCPT ); Fri, 6 Mar 2009 08:30:51 -0500 Received: from wa4ehsobe001.messaging.microsoft.com ([216.32.181.11]:7263 "EHLO WA4EHSOBE001.bigfish.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754004AbZCFNaq (ORCPT ); Fri, 6 Mar 2009 08:30:46 -0500 X-BigFish: VPS1(zzzzzzz32i62h) X-Spam-TCS-SCL: 1:0 X-FB-SS: 5, X-WSS-ID: 0KG36UW-03-1UR-01 From: Joerg Roedel To: mingo@redhat.com CC: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Joerg Roedel Subject: [PATCH 09/18] dma-debug: add checking for map/unmap_page/single Date: Fri, 6 Mar 2009 14:30:20 +0100 Message-ID: <1236346229-6618-10-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.5.6.4 In-Reply-To: <1236346229-6618-1-git-send-email-joerg.roedel@amd.com> References: <1236346229-6618-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 06 Mar 2009 13:30:30.0292 (UTC) FILETIME=[B800ED40:01C99E5F] MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2988 Lines: 118 Impact: add debug callbacks for dma_{un}map_[page|single] Signed-off-by: Joerg Roedel --- include/linux/dma-debug.h | 23 +++++++++++++++++++ lib/dma-debug.c | 53 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 76 insertions(+), 0 deletions(-) diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h index 345d538..65f7352 100644 --- a/include/linux/dma-debug.h +++ b/include/linux/dma-debug.h @@ -28,12 +28,35 @@ struct device; extern void dma_debug_init(u32 num_entries); +extern void debug_dma_map_page(struct device *dev, struct page *page, + size_t offset, size_t size, + int direction, dma_addr_t dma_addr, + bool map_single); + +extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr, + size_t size, int direction, bool map_single); + + #else /* CONFIG_DMA_API_DEBUG */ static inline void dma_debug_init(u32 num_entries) { } +static inline void debug_dma_map_page(struct device *dev, struct page *page, + size_t offset, size_t size, + int direction, dma_addr_t dma_addr, + bool map_single) +{ +} + +static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr, + size_t size, int direction, + bool map_single) +{ +} + + #endif /* CONFIG_DMA_API_DEBUG */ #endif /* __DMA_DEBUG_H */ diff --git a/lib/dma-debug.c b/lib/dma-debug.c index d0cb47a..a2ed2b7 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -566,3 +566,56 @@ out: } +void debug_dma_map_page(struct device *dev, struct page *page, size_t offset, + size_t size, int direction, dma_addr_t dma_addr, + bool map_single) +{ + struct dma_debug_entry *entry; + + if (unlikely(global_disable)) + return; + + if (unlikely(dma_mapping_error(dev, dma_addr))) + return; + + entry = dma_entry_alloc(); + if (!entry) + return; + + entry->dev = dev; + entry->type = dma_debug_page; + entry->paddr = page_to_phys(page) + offset; + entry->dev_addr = dma_addr; + entry->size = size; + entry->direction = direction; + + if (map_single) { + entry->type = dma_debug_single; + check_for_stack(dev, page_address(page) + offset); + } + + add_dma_entry(entry); +} +EXPORT_SYMBOL(debug_dma_map_page); + +void debug_dma_unmap_page(struct device *dev, dma_addr_t addr, + size_t size, int direction, bool map_single) +{ + struct dma_debug_entry ref = { + .type = dma_debug_page, + .dev = dev, + .dev_addr = addr, + .size = size, + .direction = direction, + }; + + if (unlikely(global_disable)) + return; + + if (map_single) + ref.type = dma_debug_single; + + check_unmap(&ref); +} +EXPORT_SYMBOL(debug_dma_unmap_page); + -- 1.5.6.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/