linux-kernel - [PATCH 3/8] x86: add free_coherent dma_ops callback to Calgary IOMMU driver

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Date:	Tue, 19 Aug 2008 16:32:41 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	mingo@...hat.com, tglx@...utronix.de, hpa@...or.com
CC:	linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
	muli@...ibm.com, Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 3/8] x86: add free_coherent dma_ops callback to Calgary IOMMU driver

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
Acked-by: Muli Ben-Yehuda <muli@...ibm.com>
---
 arch/x86/kernel/pci-calgary_64.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
index 8e41d42..ea6a0c8 100644
--- a/arch/x86/kernel/pci-calgary_64.c
+++ b/arch/x86/kernel/pci-calgary_64.c
@@ -510,8 +510,22 @@ error:
 	return ret;
 }
 
+static void calgary_free_coherent(struct device *dev, size_t size,
+				  void *vaddr, dma_addr_t dma_handle)
+{
+	unsigned int npages;
+	struct iommu_table *tbl = find_iommu_table(dev);
+
+	size = PAGE_ALIGN(size);
+	npages = size >> PAGE_SHIFT;
+
+	iommu_free(tbl, dma_handle, npages);
+	free_pages((unsigned long)vaddr, get_order(size));
+}
+
 static struct dma_mapping_ops calgary_dma_ops = {
 	.alloc_coherent = calgary_alloc_coherent,
+	.free_coherent = calgary_free_coherent,
 	.map_single = calgary_map_single,
 	.unmap_single = calgary_unmap_single,
 	.map_sg = calgary_map_sg,
-- 
1.5.3.7


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