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authorJeremy Fitzhardinge <jeremy@goop.org>2008-12-16 23:17:36 +0300
committerIngo Molnar <mingo@elte.hu>2008-12-17 20:58:19 +0300
commitcfb80c9eae8c7ed8f2ee81090062d15ead51cbe8 (patch)
tree8343c02e8599f0e038cc9c0b303854193fb38e37
parent8ce7996009bab7b2d23e7af7ad831fed7eb6faa1 (diff)
downloadlinux-cfb80c9eae8c7ed8f2ee81090062d15ead51cbe8.tar.xz
x86: unify pci iommu setup and allow swiotlb to compile for 32 bit
swiotlb on 32 bit will be used by Xen domain 0 support. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/include/asm/dma-mapping.h2
-rw-r--r--arch/x86/include/asm/pci.h2
-rw-r--r--arch/x86/include/asm/pci_64.h1
-rw-r--r--arch/x86/kernel/Makefile3
-rw-r--r--arch/x86/kernel/pci-dma.c6
-rw-r--r--arch/x86/kernel/pci-swiotlb_64.c2
-rw-r--r--arch/x86/mm/init_32.c3
7 files changed, 14 insertions, 5 deletions
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index 097794ff6b79..3b43a65894c4 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -65,7 +65,7 @@ static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
return dma_ops;
else
return dev->archdata.dma_ops;
-#endif /* _ASM_X86_DMA_MAPPING_H */
+#endif
}
/* Make sure we keep the same behaviour */
diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h
index 875b38edf193..50ac542c9382 100644
--- a/arch/x86/include/asm/pci.h
+++ b/arch/x86/include/asm/pci.h
@@ -82,6 +82,8 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
static inline void early_quirks(void) { }
#endif
+extern void pci_iommu_alloc(void);
+
#endif /* __KERNEL__ */
#ifdef CONFIG_X86_32
diff --git a/arch/x86/include/asm/pci_64.h b/arch/x86/include/asm/pci_64.h
index d02d936840a3..4da207982777 100644
--- a/arch/x86/include/asm/pci_64.h
+++ b/arch/x86/include/asm/pci_64.h
@@ -23,7 +23,6 @@ extern int (*pci_config_write)(int seg, int bus, int dev, int fn,
int reg, int len, u32 value);
extern void dma32_reserve_bootmem(void);
-extern void pci_iommu_alloc(void);
/* The PCI address space does equal the physical memory
* address space. The networking and block device layers use
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index b62a7667828e..a9c656f2d661 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -105,6 +105,8 @@ microcode-$(CONFIG_MICROCODE_INTEL) += microcode_intel.o
microcode-$(CONFIG_MICROCODE_AMD) += microcode_amd.o
obj-$(CONFIG_MICROCODE) += microcode.o
+obj-$(CONFIG_SWIOTLB) += pci-swiotlb_64.o # NB rename without _64
+
###
# 64 bit specific files
ifeq ($(CONFIG_X86_64),y)
@@ -118,7 +120,6 @@ ifeq ($(CONFIG_X86_64),y)
obj-$(CONFIG_GART_IOMMU) += pci-gart_64.o aperture_64.o
obj-$(CONFIG_CALGARY_IOMMU) += pci-calgary_64.o tce_64.o
obj-$(CONFIG_AMD_IOMMU) += amd_iommu_init.o amd_iommu.o
- obj-$(CONFIG_SWIOTLB) += pci-swiotlb_64.o
obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
endif
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index e150ad4f0ccc..00e07447a5bd 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -105,11 +105,15 @@ static void __init dma32_free_bootmem(void)
dma32_bootmem_ptr = NULL;
dma32_bootmem_size = 0;
}
+#endif
void __init pci_iommu_alloc(void)
{
+#ifdef CONFIG_X86_64
/* free the range so iommu could get some range less than 4G */
dma32_free_bootmem();
+#endif
+
/*
* The order of these functions is important for
* fall-back/fail-over reasons
@@ -125,8 +129,6 @@ void __init pci_iommu_alloc(void)
pci_swiotlb_init();
}
-#endif
-
void *dma_generic_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag)
{
diff --git a/arch/x86/kernel/pci-swiotlb_64.c b/arch/x86/kernel/pci-swiotlb_64.c
index f47a097a135b..a991afea6700 100644
--- a/arch/x86/kernel/pci-swiotlb_64.c
+++ b/arch/x86/kernel/pci-swiotlb_64.c
@@ -62,8 +62,10 @@ struct dma_mapping_ops swiotlb_dma_ops = {
void __init pci_swiotlb_init(void)
{
/* don't initialize swiotlb if iommu=off (no_iommu=1) */
+#ifdef CONFIG_X86_64
if (!iommu_detected && !no_iommu && max_pfn > MAX_DMA32_PFN)
swiotlb = 1;
+#endif
if (swiotlb_force)
swiotlb = 1;
if (swiotlb) {
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index c483f4242079..2b4b14fc0c04 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -21,6 +21,7 @@
#include <linux/init.h>
#include <linux/highmem.h>
#include <linux/pagemap.h>
+#include <linux/pci.h>
#include <linux/pfn.h>
#include <linux/poison.h>
#include <linux/bootmem.h>
@@ -971,6 +972,8 @@ void __init mem_init(void)
start_periodic_check_for_corruption();
+ pci_iommu_alloc();
+
#ifdef CONFIG_FLATMEM
BUG_ON(!mem_map);
#endif