linux-kernel - [PATCH 08/15] asm-generic: make pci.h usable directly

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Date:	Wed, 13 May 2009 22:56:31 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arch@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Remis Lima Baima <remis.developer@...glemail.com>
Subject: [PATCH 08/15] asm-generic: make pci.h usable directly

Some generic code is using the horribly misnamed PCI_DMA_BUS_IS_PHYS
from asm/pci.h. This makes sure that an architecture without PCI
support does not have to define this itself but can rely on the
asm-generic version.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Remis Lima Baima <remis.developer@...glemail.com>
---
 arch/frv/include/asm/pci.h  |   13 +++----------
 arch/m32r/include/asm/pci.h |    2 --
 include/asm-generic/pci.h   |    8 ++++++++
 3 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/arch/frv/include/asm/pci.h b/arch/frv/include/asm/pci.h
index 585d9b4..3ce227b 100644
--- a/arch/frv/include/asm/pci.h
+++ b/arch/frv/include/asm/pci.h
@@ -10,8 +10,8 @@
  * 2 of the License, or (at your option) any later version.
  */
 
-#ifndef ASM_PCI_H
-#define	ASM_PCI_H
+#ifndef _ASM_FRV_PCI_H
+#define _ASM_FRV_PCI_H
 
 #include <linux/mm.h>
 #include <asm/scatterlist.h>
@@ -43,12 +43,6 @@ extern void pci_free_consistent(struct pci_dev *hwdev, size_t size,
 /* Return the index of the PCI controller for device PDEV. */
 #define pci_controller_num(PDEV)	(0)
 
-/* The PCI address space does equal the physical memory
- * address space.  The networking and block device layers use
- * this boolean for bounce buffer decisions.
- */
-#define PCI_DMA_BUS_IS_PHYS	(1)
-
 /* pci_unmap_{page,single} is a nop so... */
 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
@@ -114,5 +108,4 @@ static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
 				    sg_dma_address(&sg[i])+sg_dma_len(&sg[i]));
 }
 
-
-#endif
+#endif /* _ASM_FRV_PCI_H */
diff --git a/arch/m32r/include/asm/pci.h b/arch/m32r/include/asm/pci.h
index fe785d1..07d3834 100644
--- a/arch/m32r/include/asm/pci.h
+++ b/arch/m32r/include/asm/pci.h
@@ -3,6 +3,4 @@
 
 #include <asm-generic/pci.h>
 
-#define PCI_DMA_BUS_IS_PHYS	(1)
-
 #endif /* _ASM_M32R_PCI_H */
diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h
index c36a77d..515c6e2 100644
--- a/include/asm-generic/pci.h
+++ b/include/asm-generic/pci.h
@@ -52,4 +52,12 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 }
 #endif /* HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ */
 
+/*
+ * By default, assume that no iommu is in use and that the PCI
+ * space is mapped to address physical 0.
+ */
+#ifndef PCI_DMA_BUS_IS_PHYS
+#define PCI_DMA_BUS_IS_PHYS	(1)
 #endif
+
+#endif /* _ASM_GENERIC_PCI_H */
-- 
1.6.0.4

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