Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH 10/16] dma-debug: add add checking for map/unmap_sg | Date | Mon, 19 Jan 2009 15:46:57 +0100 |
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Impact: add debug callbacks for dma_{un}map_sg
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> --- include/linux/dma-debug.h | 15 ++++++++++++ lib/dma-debug.c | 53 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 68 insertions(+), 0 deletions(-)
diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h index ea6a283..61f559d 100644 --- a/include/linux/dma-debug.h +++ b/include/linux/dma-debug.h @@ -36,6 +36,11 @@ extern void debug_dma_map_page(struct device *dev, struct page *page, extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr, size_t size, int direction, bool map_single); +extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg, + int nents, int direction); + +extern void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist, + int nelems, int dir); #else /* CONFIG_DMA_API_DEBUG */ @@ -56,6 +61,16 @@ static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr, { } +static inline void debug_dma_map_sg(struct device *dev, struct scatterlist *sg, + int nents, int direction) +{ +} + +static inline void debug_dma_unmap_sg(struct device *dev, + struct scatterlist *sglist, + int nelems, int dir) +{ +} #endif /* CONFIG_DMA_API_DEBUG */ diff --git a/lib/dma-debug.c b/lib/dma-debug.c index 9219c41..f3e0145 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -17,6 +17,7 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include <linux/scatterlist.h> #include <linux/dma-mapping.h> #include <linux/dma-debug.h> #include <linux/spinlock.h> @@ -576,3 +577,55 @@ void debug_dma_unmap_page(struct device *dev, dma_addr_t addr, } EXPORT_SYMBOL(debug_dma_unmap_page); +void debug_dma_map_sg(struct device *dev, struct scatterlist *sg, + int nents, int direction) +{ + struct dma_debug_entry *entry; + struct scatterlist *s; + int i; + + if (unlikely(global_disable)) + return; + + for_each_sg(sg, s, nents, i) { + entry = dma_entry_alloc(); + if (!entry) + return; + + entry->type = dma_debug_sg; + entry->dev = dev; + entry->paddr = sg_phys(s); + entry->size = s->length; + entry->dev_addr = s->dma_address; + entry->direction = direction; + + add_dma_entry(entry); + } +} +EXPORT_SYMBOL(debug_dma_map_sg); + +void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist, + int nelems, int dir) +{ + struct scatterlist *s; + int i; + + if (unlikely(global_disable)) + return; + + for_each_sg(sglist, s, nelems, i) { + + struct dma_debug_entry ref = { + .type = dma_debug_sg, + .dev = dev, + .paddr = sg_phys(s), + .dev_addr = s->dma_address, + .size = s->length, + .direction = dir, + }; + + check_unmap(&ref); + } +} +EXPORT_SYMBOL(debug_dma_unmap_sg); + -- 1.5.6.4
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