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Merge branch 'swiotlb' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

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This commit is contained in:
Linus Torvalds 2005-11-02 18:36:15 -08:00
commit 3a7142371e
7 changed files with 139 additions and 52 deletions
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4
arch/ia64/Kconfig
View File

@ -26,6 +26,10 @@ config MMU
bool
default y
config SWIOTLB
bool
default y
config RWSEM_XCHGADD_ALGORITHM
bool
default y

2
arch/ia64/lib/Makefile
View File

@ -9,7 +9,7 @@ lib-y := __divsi3.o __udivsi3.o __modsi3.o __umodsi3.o \
bitop.o checksum.o clear_page.o csum_partial_copy.o \
clear_user.o strncpy_from_user.o strlen_user.o strnlen_user.o \
flush.o ip_fast_csum.o do_csum.o \
memset.o strlen.o swiotlb.o
memset.o strlen.o
lib-$(CONFIG_ITANIUM) += copy_page.o copy_user.o memcpy.o
lib-$(CONFIG_MCKINLEY) += copy_page_mck.o memcpy_mck.o

2
arch/x86_64/kernel/Makefile
View File

@ -27,7 +27,6 @@ obj-$(CONFIG_CPU_FREQ) += cpufreq/
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_GART_IOMMU) += pci-gart.o aperture.o
obj-$(CONFIG_DUMMY_IOMMU) += pci-nommu.o pci-dma.o
obj-$(CONFIG_SWIOTLB) += swiotlb.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_X86_PM_TIMER) += pmtimer.o
@ -41,7 +40,6 @@ CFLAGS_vsyscall.o := $(PROFILING) -g0
bootflag-y += ../../i386/kernel/bootflag.o
cpuid-$(subst m,y,$(CONFIG_X86_CPUID)) += ../../i386/kernel/cpuid.o
topology-y += ../../i386/mach-default/topology.o
swiotlb-$(CONFIG_SWIOTLB) += ../../ia64/lib/swiotlb.o
microcode-$(subst m,y,$(CONFIG_MICROCODE)) += ../../i386/kernel/microcode.o
intel_cacheinfo-y += ../../i386/kernel/cpu/intel_cacheinfo.o
quirks-y += ../../i386/kernel/quirks.o

31
include/asm-x86_64/dma-mapping.h
View File

@ -85,10 +85,33 @@ static inline void dma_sync_single_for_device(struct device *hwdev,
flush_write_buffers();
}
#define dma_sync_single_range_for_cpu(dev, dma_handle, offset, size, dir) \
dma_sync_single_for_cpu(dev, dma_handle, size, dir)
#define dma_sync_single_range_for_device(dev, dma_handle, offset, size, dir) \
dma_sync_single_for_device(dev, dma_handle, size, dir)
static inline void dma_sync_single_range_for_cpu(struct device *hwdev,
dma_addr_t dma_handle,
unsigned long offset,
size_t size, int direction)
{
if (direction == DMA_NONE)
out_of_line_bug();
if (swiotlb)
return swiotlb_sync_single_range_for_cpu(hwdev,dma_handle,offset,size,direction);
flush_write_buffers();
}
static inline void dma_sync_single_range_for_device(struct device *hwdev,
dma_addr_t dma_handle,
unsigned long offset,
size_t size, int direction)
{
if (direction == DMA_NONE)
out_of_line_bug();
if (swiotlb)
return swiotlb_sync_single_range_for_device(hwdev,dma_handle,offset,size,direction);
flush_write_buffers();
}
static inline void dma_sync_sg_for_cpu(struct device *hwdev,
struct scatterlist *sg,

8
include/asm-x86_64/swiotlb.h
View File

@ -15,6 +15,14 @@ extern void swiotlb_sync_single_for_cpu(struct device *hwdev,
extern void swiotlb_sync_single_for_device(struct device *hwdev,
dma_addr_t dev_addr,
size_t size, int dir);
extern void swiotlb_sync_single_range_for_cpu(struct device *hwdev,
dma_addr_t dev_addr,
unsigned long offset,
size_t size, int dir);
extern void swiotlb_sync_single_range_for_device(struct device *hwdev,
dma_addr_t dev_addr,
unsigned long offset,
size_t size, int dir);
extern void swiotlb_sync_sg_for_cpu(struct device *hwdev,
struct scatterlist *sg, int nelems,
int dir);

2
lib/Makefile
View File

@ -44,6 +44,8 @@ obj-$(CONFIG_TEXTSEARCH_KMP) += ts_kmp.o
obj-$(CONFIG_TEXTSEARCH_BM) += ts_bm.o
obj-$(CONFIG_TEXTSEARCH_FSM) += ts_fsm.o
obj-$(CONFIG_SWIOTLB) += swiotlb.o
hostprogs-y := gen_crc32table
clean-files := crc32table.h

142
arch/ia64/lib/swiotlb.c → lib/swiotlb.c
View File

@ -1,7 +1,7 @@
/*
* Dynamic DMA mapping support.
*
* This implementation is for IA-64 platforms that do not support
* This implementation is for IA-64 and EM64T platforms that do not support
* I/O TLBs (aka DMA address translation hardware).
* Copyright (C) 2000 Asit Mallick <Asit.K.Mallick@intel.com>
* Copyright (C) 2000 Goutham Rao <goutham.rao@intel.com>
@ -11,21 +11,23 @@
* 03/05/07 davidm Switch from PCI-DMA to generic device DMA API.
* 00/12/13 davidm Rename to swiotlb.c and add mark_clean() to avoid
* unnecessary i-cache flushing.
* 04/07/.. ak Better overflow handling. Assorted fixes.
* 04/07/.. ak Better overflow handling. Assorted fixes.
* 05/09/10 linville Add support for syncing ranges, support syncing for
* DMA_BIDIRECTIONAL mappings, miscellaneous cleanup.
*/
#include <linux/cache.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/ctype.h>
#include <asm/io.h>
#include <asm/pci.h>
#include <asm/dma.h>
#include <asm/scatterlist.h>
#include <linux/init.h>
#include <linux/bootmem.h>
@ -58,6 +60,14 @@
*/
#define IO_TLB_MIN_SLABS ((1<<20) >> IO_TLB_SHIFT)
/*
* Enumeration for sync targets
*/
enum dma_sync_target {
SYNC_FOR_CPU = 0,
SYNC_FOR_DEVICE = 1,
};
int swiotlb_force;
/*
@ -117,7 +127,7 @@ __setup("swiotlb=", setup_io_tlb_npages);
/*
* Statically reserve bounce buffer space and initialize bounce buffer data
* structures for the software IO TLB used to implement the PCI DMA API.
* structures for the software IO TLB used to implement the DMA API.
*/
void
swiotlb_init_with_default_size (size_t default_size)
@ -397,21 +407,28 @@ unmap_single(struct device *hwdev, char *dma_addr, size_t size, int dir)
}
static void
sync_single(struct device *hwdev, char *dma_addr, size_t size, int dir)
sync_single(struct device *hwdev, char *dma_addr, size_t size,
int dir, int target)
{
int index = (dma_addr - io_tlb_start) >> IO_TLB_SHIFT;
char *buffer = io_tlb_orig_addr[index];
/*
* bounce... copy the data back into/from the original buffer
* XXX How do you handle DMA_BIDIRECTIONAL here ?
*/
if (dir == DMA_FROM_DEVICE)
memcpy(buffer, dma_addr, size);
else if (dir == DMA_TO_DEVICE)
memcpy(dma_addr, buffer, size);
else
switch (target) {
case SYNC_FOR_CPU:
if (likely(dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL))
memcpy(buffer, dma_addr, size);
else if (dir != DMA_TO_DEVICE)
BUG();
break;
case SYNC_FOR_DEVICE:
if (likely(dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL))
memcpy(dma_addr, buffer, size);
else if (dir != DMA_FROM_DEVICE)
BUG();
break;
default:
BUG();
}
}
void *
@ -485,24 +502,24 @@ swiotlb_full(struct device *dev, size_t size, int dir, int do_panic)
/*
* Ran out of IOMMU space for this operation. This is very bad.
* Unfortunately the drivers cannot handle this operation properly.
* unless they check for pci_dma_mapping_error (most don't)
* unless they check for dma_mapping_error (most don't)
* When the mapping is small enough return a static buffer to limit
* the damage, or panic when the transfer is too big.
*/
printk(KERN_ERR "PCI-DMA: Out of SW-IOMMU space for %lu bytes at "
printk(KERN_ERR "DMA: Out of SW-IOMMU space for %lu bytes at "
"device %s\n", size, dev ? dev->bus_id : "?");
if (size > io_tlb_overflow && do_panic) {
if (dir == PCI_DMA_FROMDEVICE || dir == PCI_DMA_BIDIRECTIONAL)
panic("PCI-DMA: Memory would be corrupted\n");
if (dir == PCI_DMA_TODEVICE || dir == PCI_DMA_BIDIRECTIONAL)
panic("PCI-DMA: Random memory would be DMAed\n");
if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL)
panic("DMA: Memory would be corrupted\n");
if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL)
panic("DMA: Random memory would be DMAed\n");
}
}
/*
* Map a single buffer of the indicated size for DMA in streaming mode. The
* PCI address to use is returned.
* physical address to use is returned.
*
* Once the device is given the dma address, the device owns this memory until
* either swiotlb_unmap_single or swiotlb_dma_sync_single is performed.
@ -589,39 +606,73 @@ swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr, size_t size,
* after a transfer.
*
* If you perform a swiotlb_map_single() but wish to interrogate the buffer
* using the cpu, yet do not wish to teardown the PCI dma mapping, you must
* call this function before doing so. At the next point you give the PCI dma
* using the cpu, yet do not wish to teardown the dma mapping, you must
* call this function before doing so. At the next point you give the dma
* address back to the card, you must first perform a
* swiotlb_dma_sync_for_device, and then the device again owns the buffer
*/
void
swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir)
static inline void
swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir, int target)
{
char *dma_addr = phys_to_virt(dev_addr);
if (dir == DMA_NONE)
BUG();
if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
sync_single(hwdev, dma_addr, size, dir);
sync_single(hwdev, dma_addr, size, dir, target);
else if (dir == DMA_FROM_DEVICE)
mark_clean(dma_addr, size);
}
void
swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir)
{
swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_CPU);
}
void
swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir)
{
char *dma_addr = phys_to_virt(dev_addr);
swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_DEVICE);
}
/*
* Same as above, but for a sub-range of the mapping.
*/
static inline void
swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr,
unsigned long offset, size_t size,
int dir, int target)
{
char *dma_addr = phys_to_virt(dev_addr) + offset;
if (dir == DMA_NONE)
BUG();
if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
sync_single(hwdev, dma_addr, size, dir);
sync_single(hwdev, dma_addr, size, dir, target);
else if (dir == DMA_FROM_DEVICE)
mark_clean(dma_addr, size);
}
void
swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
unsigned long offset, size_t size, int dir)
{
swiotlb_sync_single_range(hwdev, dev_addr, offset, size, dir,
SYNC_FOR_CPU);
}
void
swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
unsigned long offset, size_t size, int dir)
{
swiotlb_sync_single_range(hwdev, dev_addr, offset, size, dir,
SYNC_FOR_DEVICE);
}
/*
* Map a set of buffers described by scatterlist in streaming mode for DMA.
* This is the scatter-gather version of the above swiotlb_map_single
@ -696,9 +747,9 @@ swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nelems,
* The same as swiotlb_sync_single_* but for a scatter-gather list, same rules
* and usage.
*/
void
swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
int nelems, int dir)
static inline void
swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sg,
int nelems, int dir, int target)
{
int i;
@ -708,22 +759,21 @@ swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
for (i = 0; i < nelems; i++, sg++)
if (sg->dma_address != SG_ENT_PHYS_ADDRESS(sg))
sync_single(hwdev, (void *) sg->dma_address,
sg->dma_length, dir);
sg->dma_length, dir, target);
}
void
swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
int nelems, int dir)
{
swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_CPU);
}
void
swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
int nelems, int dir)
{
int i;
if (dir == DMA_NONE)
BUG();
for (i = 0; i < nelems; i++, sg++)
if (sg->dma_address != SG_ENT_PHYS_ADDRESS(sg))
sync_single(hwdev, (void *) sg->dma_address,
sg->dma_length, dir);
swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_DEVICE);
}
int
@ -733,9 +783,9 @@ swiotlb_dma_mapping_error(dma_addr_t dma_addr)
}
/*
* Return whether the given PCI device DMA address mask can be supported
* Return whether the given device DMA address mask can be supported
* properly. For example, if your device can only drive the low 24-bits
* during PCI bus mastering, then you would pass 0x00ffffff as the mask to
* during bus mastering, then you would pass 0x00ffffff as the mask to
* this function.
*/
int
@ -751,6 +801,8 @@ EXPORT_SYMBOL(swiotlb_map_sg);
EXPORT_SYMBOL(swiotlb_unmap_sg);
EXPORT_SYMBOL(swiotlb_sync_single_for_cpu);
EXPORT_SYMBOL(swiotlb_sync_single_for_device);
EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_cpu);
EXPORT_SYMBOL_GPL(swiotlb_sync_single_range_for_device);
EXPORT_SYMBOL(swiotlb_sync_sg_for_cpu);
EXPORT_SYMBOL(swiotlb_sync_sg_for_device);
EXPORT_SYMBOL(swiotlb_dma_mapping_error);