linux-kernel - [PATCH 07/10] x86: convert Calgary IOMMU driver to generic iommu_num

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Date:	Mon, 4 Aug 2008 18:04:47 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	mingo@...hat.com, tglx@...utronix.de, hpa@...or.com,
	rth@...ddle.net, paulus@...ba.org, benh@...nel.crashing.org,
	davem@...emloft.net,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Muli Ben-Yehuda <muli@...ibm.com>,
	linux-kernel@...r.kernel.org, Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 07/10] x86: convert Calgary IOMMU driver to generic iommu_num_pages function

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 arch/x86/kernel/pci-calgary_64.c |   18 ++++--------------
 1 files changed, 4 insertions(+), 14 deletions(-)

diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
index b67a4b1..1fbba8a 100644
--- a/arch/x86/kernel/pci-calgary_64.c
+++ b/arch/x86/kernel/pci-calgary_64.c
@@ -217,16 +217,6 @@ static inline unsigned long verify_bit_range(unsigned long* bitmap,
 
 #endif /* CONFIG_IOMMU_DEBUG */
 
-static inline unsigned int num_dma_pages(unsigned long dma, unsigned int dmalen)
-{
-	unsigned int npages;
-
-	npages = PAGE_ALIGN(dma + dmalen) - (dma & PAGE_MASK);
-	npages >>= PAGE_SHIFT;
-
-	return npages;
-}
-
 static inline int translation_enabled(struct iommu_table *tbl)
 {
 	/* only PHBs with translation enabled have an IOMMU table */
@@ -409,7 +399,7 @@ static void calgary_unmap_sg(struct device *dev,
 		if (dmalen == 0)
 			break;
 
-		npages = num_dma_pages(dma, dmalen);
+		npages = iommu_num_pages(dma, dmalen, PAGE_SIZE);
 		iommu_free(tbl, dma, npages);
 	}
 }
@@ -428,7 +418,7 @@ static int calgary_map_sg(struct device *dev, struct scatterlist *sg,
 		BUG_ON(!sg_page(s));
 
 		vaddr = (unsigned long) sg_virt(s);
-		npages = num_dma_pages(vaddr, s->length);
+		npages = iommu_num_pages(vaddr, s->length, PAGE_SIZE);
 
 		entry = iommu_range_alloc(dev, tbl, npages);
 		if (entry == bad_dma_address) {
@@ -465,7 +455,7 @@ static dma_addr_t calgary_map_single(struct device *dev, phys_addr_t paddr,
 	struct iommu_table *tbl = find_iommu_table(dev);
 
 	uaddr = (unsigned long)vaddr;
-	npages = num_dma_pages(uaddr, size);
+	npages = iommu_num_pages(uaddr, size, PAGE_SIZE);
 
 	return iommu_alloc(dev, tbl, vaddr, npages, direction);
 }
@@ -476,7 +466,7 @@ static void calgary_unmap_single(struct device *dev, dma_addr_t dma_handle,
 	struct iommu_table *tbl = find_iommu_table(dev);
 	unsigned int npages;
 
-	npages = num_dma_pages(dma_handle, size);
+	npages = iommu_num_pages(dma_handle, size, PAGE_SIZE);
 	iommu_free(tbl, dma_handle, npages);
 }
 
-- 
1.5.3.7


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