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x86: unify pci-nommu

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merge pci-base_32.c and pci-nommu_64.c into pci-nommu.c
Their code were made the same, so now they can be merged.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Glauber Costa 2008-04-08 13:20:52 -03:00 committed by Ingo Molnar
parent 85c246ee16
commit f9c258de34
5 changed files with 11 additions and 72 deletions
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5
arch/x86/kernel/Makefile
View file

@ -24,9 +24,8 @@ obj-$(CONFIG_X86_64) += sys_x86_64.o x8664_ksyms_64.o
obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o setup64.o
obj-y += pci-dma_$(BITS).o bootflag.o e820_$(BITS).o
obj-y += pci-dma.o quirks.o i8237.o topology.o kdebugfs.o
obj-y += alternative.o i8253.o
obj-$(CONFIG_X86_64) += pci-nommu_64.o bugs_64.o
obj-$(CONFIG_X86_32) += pci-base_32.o
obj-y += alternative.o i8253.o pci-nommu.o
obj-$(CONFIG_X86_64) += bugs_64.o
obj-y += tsc_$(BITS).o io_delay.o rtc.o
obj-$(CONFIG_X86_TRAMPOLINE) += trampoline.o

60
arch/x86/kernel/pci-base_32.c
View file

@ -1,60 +0,0 @@
#include <linux/mm.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <asm/dma-mapping.h>
static dma_addr_t pci32_map_single(struct device *dev, phys_addr_t ptr,
size_t size, int direction)
{
WARN_ON(size == 0);
flush_write_buffers();
return ptr;
}
static int pci32_dma_map_sg(struct device *dev, struct scatterlist *sglist,
int nents, int direction)
{
struct scatterlist *sg;
int i;
WARN_ON(nents == 0 || sglist[0].length == 0);
for_each_sg(sglist, sg, nents, i) {
BUG_ON(!sg_page(sg));
sg->dma_address = sg_phys(sg);
sg->dma_length = sg->length;
}
flush_write_buffers();
return nents;
}
/* Make sure we keep the same behaviour */
static int pci32_map_error(dma_addr_t dma_addr)
{
return 0;
}
const struct dma_mapping_ops pci32_dma_ops = {
.map_single = pci32_map_single,
.unmap_single = NULL,
.map_sg = pci32_dma_map_sg,
.unmap_sg = NULL,
.sync_single_for_cpu = NULL,
.sync_single_for_device = NULL,
.sync_single_range_for_cpu = NULL,
.sync_single_range_for_device = NULL,
.sync_sg_for_cpu = NULL,
.sync_sg_for_device = NULL,
.mapping_error = pci32_map_error,
};
/* this is temporary */
int __init no_iommu_init(void)
{
dma_ops = &pci32_dma_ops;
return 0;
}
fs_initcall(no_iommu_init);

8
arch/x86/kernel/pci-dma.c
View file

@ -3,6 +3,14 @@
const struct dma_mapping_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);
#ifdef CONFIG_IOMMU_DEBUG
int panic_on_overflow __read_mostly = 1;
int force_iommu __read_mostly = 1;
#else
int panic_on_overflow __read_mostly = 0;
int force_iommu __read_mostly = 0;
#endif
int dma_set_mask(struct device *dev, u64 mask)
{
if (!dev->dma_mask || !dma_supported(dev, mask))

8
arch/x86/kernel/pci-dma_64.c
View file

@ -27,14 +27,6 @@ EXPORT_SYMBOL(iommu_bio_merge);
static int iommu_sac_force __read_mostly = 0;
int no_iommu __read_mostly;
#ifdef CONFIG_IOMMU_DEBUG
int panic_on_overflow __read_mostly = 1;
int force_iommu __read_mostly = 1;
#else
int panic_on_overflow __read_mostly = 0;
int force_iommu __read_mostly= 0;
#endif
/* Set this to 1 if there is a HW IOMMU in the system */
int iommu_detected __read_mostly = 0;

2
arch/x86/kernel/pci-nommu_64.c → arch/x86/kernel/pci-nommu.c
View file

@ -14,7 +14,7 @@
static int
check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size)
{
if (hwdev && bus + size > *hwdev->dma_mask) {
if (hwdev && bus + size > *hwdev->dma_mask) {
if (*hwdev->dma_mask >= DMA_32BIT_MASK)
printk(KERN_ERR
"nommu_%s: overflow %Lx+%zu of device mask %Lx\n",