---

yaml --- r: 83011 b: refs/heads/master c: 740c3ce h: refs/heads/master i: 83009: 0e4341b 83007: 5550372 v: v3
git-mirror · Feb 5, 2008 · bfc6a15 · bfc6a15
1 parent e2afdd7
commit bfc6a15
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Showing 4 changed files with 9 additions and 5 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 42d00284e16bf998f8f93ce5d061df81b0ff283e
+refs/heads/master: 740c3ce66700640a6e6136ff679b067e92125794
diff --git a/trunk/arch/powerpc/kernel/dma_64.c b/trunk/arch/powerpc/kernel/dma_64.c
@@ -68,7 +68,7 @@ static void dma_iommu_unmap_single(struct device *dev, dma_addr_t dma_handle,
 static int dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,
 			    int nelems, enum dma_data_direction direction)
 {
-	return iommu_map_sg(dev->archdata.dma_data, sglist, nelems,
+	return iommu_map_sg(dev, sglist, nelems,
 			    device_to_mask(dev), direction);
 }
 

diff --git a/trunk/arch/powerpc/kernel/iommu.c b/trunk/arch/powerpc/kernel/iommu.c
@@ -270,16 +270,18 @@ static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr,
 	spin_unlock_irqrestore(&(tbl->it_lock), flags);
 }
 
-int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
+int iommu_map_sg(struct device *dev, struct scatterlist *sglist,
 		 int nelems, unsigned long mask,
 		 enum dma_data_direction direction)
 {
+	struct iommu_table *tbl = dev->archdata.dma_data;
 	dma_addr_t dma_next = 0, dma_addr;
 	unsigned long flags;
 	struct scatterlist *s, *outs, *segstart;
 	int outcount, incount, i;
 	unsigned int align;
 	unsigned long handle;
+	unsigned int max_seg_size;
 
 	BUG_ON(direction == DMA_NONE);
 
@@ -298,6 +300,7 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
 
 	spin_lock_irqsave(&(tbl->it_lock), flags);
 
+	max_seg_size = dma_get_max_seg_size(dev);
 	for_each_sg(sglist, s, nelems, i) {
 		unsigned long vaddr, npages, entry, slen;
 
@@ -344,7 +347,8 @@ int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
 			/* We cannot merge if:
 			 * - allocated dma_addr isn't contiguous to previous allocation
 			 */
-			if (novmerge || (dma_addr != dma_next)) {
+			if (novmerge || (dma_addr != dma_next) ||
+			    (outs->dma_length + s->length > max_seg_size)) {
 				/* Can't merge: create a new segment */
 				segstart = s;
 				outcount++;

diff --git a/trunk/include/asm-powerpc/iommu.h b/trunk/include/asm-powerpc/iommu.h
@@ -79,7 +79,7 @@ extern void iommu_free_table(struct iommu_table *tbl, const char *node_name);
 extern struct iommu_table *iommu_init_table(struct iommu_table * tbl,
 					    int nid);
 
-extern int iommu_map_sg(struct iommu_table *tbl, struct scatterlist *sglist,
+extern int iommu_map_sg(struct device *dev, struct scatterlist *sglist,
 			int nelems, unsigned long mask,
 			enum dma_data_direction direction);
 extern void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,