linux-kernel - [PATCH 5/9] x86/iommu: change GART to use dma

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Date:	Mon, 22 Sep 2008 20:21:17 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	iommu@...ts.linux-foundation.org
CC:	David Woodhouse <dwmw2@...radead.org>,
	Muli Ben-Yehuda <muli@...ibm.com>,
	Amit Shah <amit.shah@...ranet.com>,
	Ingo Molnar <mingo@...hat.com>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 5/9] x86/iommu: change GART to use dma_ops register interface

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 arch/x86/kernel/pci-gart_64.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index 508ef47..c5891c9 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -533,6 +533,12 @@ gart_free_coherent(struct device *dev, size_t size, void *vaddr,
 	free_pages((unsigned long)vaddr, get_order(size));
 }
 
+static int gart_device_supported(struct device *dev)
+{
+	/* GART remaps _everything_ (including CPU memory accesses) */
+	return 1;
+}
+
 static int no_agp;
 
 static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size)
@@ -736,6 +742,7 @@ static struct dma_mapping_ops gart_dma_ops = {
 	.unmap_sg			= gart_unmap_sg,
 	.alloc_coherent			= gart_alloc_coherent,
 	.free_coherent			= gart_free_coherent,
+	.device_supported		= gart_device_supported,
 };
 
 void gart_iommu_shutdown(void)
@@ -874,6 +881,8 @@ void __init gart_iommu_init(void)
 		iommu_gatt_base[i] = gart_unmapped_entry;
 
 	flush_gart();
+
+	x86_register_dma_ops(&gart_dma_ops, DMA_OPS_TYPE_HW);
 	dma_ops = &gart_dma_ops;
 }
 
-- 
1.5.6.4


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