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Date: Tue, 8 Apr 2008 13:20:53 -0300
From: Glauber Costa <gcosta@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: akpm@...ux-foundation.org, glommer@...il.com, mingo@...e.hu,
tglx@...utronix.de, kvm-devel@...ts.sourceforge.net,
amit.shah@...ranet.com, avi@...ranet.com,
Glauber Costa <gcosta@...hat.com>
Subject: [PATCH 11/28] x86: move pci fixup to pci-dma.c
via_no_dac provides a fixup that is the same for both
architectures. Move it to pci-dma.c.
Signed-off-by: Glauber Costa <gcosta@...hat.com>
---
arch/x86/kernel/pci-dma.c | 18 ++++++++++++++++++
arch/x86/kernel/pci-dma_32.c | 13 -------------
arch/x86/kernel/pci-dma_64.c | 15 ---------------
include/asm-x86/dma-mapping.h | 2 +-
4 files changed, 19 insertions(+), 29 deletions(-)
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 6b77fd8..e81e16f 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -1,9 +1,13 @@
#include <linux/dma-mapping.h>
#include <linux/dmar.h>
+#include <linux/pci.h>
#include <asm/gart.h>
#include <asm/calgary.h>
+int forbid_dac __read_mostly;
+EXPORT_SYMBOL(forbid_dac);
+
const struct dma_mapping_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);
@@ -48,3 +52,17 @@ void pci_iommu_shutdown(void)
}
/* Must execute after PCI subsystem */
fs_initcall(pci_iommu_init);
+
+#ifdef CONFIG_PCI
+/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
+
+static __devinit void via_no_dac(struct pci_dev *dev)
+{
+ if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
+ printk(KERN_INFO "PCI: VIA PCI bridge detected."
+ "Disabling DAC.\n");
+ forbid_dac = 1;
+ }
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
+#endif
diff --git a/arch/x86/kernel/pci-dma_32.c b/arch/x86/kernel/pci-dma_32.c
index 9e82976..6543bb3 100644
--- a/arch/x86/kernel/pci-dma_32.c
+++ b/arch/x86/kernel/pci-dma_32.c
@@ -157,9 +157,6 @@ EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
#ifdef CONFIG_PCI
/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
-int forbid_dac;
-EXPORT_SYMBOL(forbid_dac);
-
int
dma_supported(struct device *dev, u64 mask)
{
@@ -182,16 +179,6 @@ dma_supported(struct device *dev, u64 mask)
}
EXPORT_SYMBOL(dma_supported);
-
-static __devinit void via_no_dac(struct pci_dev *dev)
-{
- if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
- printk(KERN_INFO "PCI: VIA PCI bridge detected. Disabling DAC.\n");
- forbid_dac = 1;
- }
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
-
static int check_iommu(char *s)
{
if (!strcmp(s, "usedac")) {
diff --git a/arch/x86/kernel/pci-dma_64.c b/arch/x86/kernel/pci-dma_64.c
index 4202130..e194460 100644
--- a/arch/x86/kernel/pci-dma_64.c
+++ b/arch/x86/kernel/pci-dma_64.c
@@ -161,8 +161,6 @@ void dma_free_coherent(struct device *dev, size_t size,
}
EXPORT_SYMBOL(dma_free_coherent);
-static int forbid_dac __read_mostly;
-
int dma_supported(struct device *dev, u64 mask)
{
#ifdef CONFIG_PCI
@@ -338,16 +336,3 @@ void __init pci_iommu_alloc(void)
pci_swiotlb_init();
#endif
}
-
-#ifdef CONFIG_PCI
-/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
-
-static __devinit void via_no_dac(struct pci_dev *dev)
-{
- if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
- printk(KERN_INFO "PCI: VIA PCI bridge detected. Disabling DAC.\n");
- forbid_dac = 1;
- }
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
-#endif
diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h
index 914846d..d82517d 100644
--- a/include/asm-x86/dma-mapping.h
+++ b/include/asm-x86/dma-mapping.h
@@ -14,6 +14,7 @@ extern dma_addr_t bad_dma_address;
extern int iommu_merge;
extern struct device fallback_dev;
extern int panic_on_overflow;
+extern int forbid_dac;
struct dma_mapping_ops {
int (*mapping_error)(dma_addr_t dma_addr);
@@ -223,6 +224,5 @@ dma_release_declared_memory(struct device *dev);
extern void *
dma_mark_declared_memory_occupied(struct device *dev,
dma_addr_t device_addr, size_t size);
-extern int forbid_dac;
#endif /* CONFIG_X86_32 */
#endif
--
1.5.0.6
--
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