linux-kernel - [PATCH 19 of 38] x86: add arch specific version of the swiotlb virt<->bus<->virt functions

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Message-Id: <8405f18a95e67aa16fe1.1226603417@abulafia.goop.org>
Date:	Thu, 13 Nov 2008 11:10:17 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	Xen-devel <xen-devel@...ts.xensource.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Ian Campbell <ian.campbell@...rix.com>
Subject: [PATCH 19 of 38] x86: add arch specific version of the swiotlb
	virt<->bus<->virt functions

From: Ian Campbell <ian.campbell@...rix.com>

These are to be used later and contain the default implementation.

Signed-off-by: Ian Campbell <ian.campbell@...rix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
---
 arch/x86/kernel/pci-swiotlb_64.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/x86/kernel/pci-swiotlb_64.c b/arch/x86/kernel/pci-swiotlb_64.c
--- a/arch/x86/kernel/pci-swiotlb_64.c
+++ b/arch/x86/kernel/pci-swiotlb_64.c
@@ -23,6 +23,16 @@
 	return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order);
 }
 
+unsigned long swiotlb_virt_to_bus(volatile void *address)
+{
+	return virt_to_bus(address);
+}
+
+void * swiotlb_bus_to_virt(unsigned long address)
+{
+	return bus_to_virt(address);
+}
+
 static dma_addr_t
 swiotlb_map_single_phys(struct device *hwdev, phys_addr_t paddr, size_t size,
 			int direction)


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