mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 00:40:03 +00:00
![Arnd Bergmann](/assets/img/avatar_default.png)
This moves flush_write_buffers() in asm-generic/dma-mapping-common.h to arch/x86/kernel/pci-nommu.c. The purpose of this patch is that, we can avoid defining NULL flush_write_buffers() on IA64 and SPARC. dma-mapping-common.h is used by X86 and IA64 (and SPARC soon) but only X86 with CONFIG_X86_OOSTORE or CONFIG_X86_PPRO_FENCE actually uses flush_write_buffers(). CONFIG_X86_OOSTORE or CONFIG_X86_PPRO_FENCE is usable with only kernel/pci-nommu.c (that is, not usable with other X86 IOMMU implementations such as SWIOTLB, VT-d, etc) so we can safely move flush_write_buffers() in asm-generic/dma-mapping-common.h to arch/x86/kernel/pci-nommu.c. The further discussion is: http://lkml.org/lkml/2009/6/28/104 Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: davem@davemloft.net Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com LKML-Reference: <1249872797-1314-2-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
184 lines
5.4 KiB
C
184 lines
5.4 KiB
C
#ifndef _ASM_GENERIC_DMA_MAPPING_H
|
|
#define _ASM_GENERIC_DMA_MAPPING_H
|
|
|
|
#include <linux/kmemcheck.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/dma-debug.h>
|
|
#include <linux/dma-attrs.h>
|
|
|
|
static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
|
|
size_t size,
|
|
enum dma_data_direction dir,
|
|
struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
dma_addr_t addr;
|
|
|
|
kmemcheck_mark_initialized(ptr, size);
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
addr = ops->map_page(dev, virt_to_page(ptr),
|
|
(unsigned long)ptr & ~PAGE_MASK, size,
|
|
dir, attrs);
|
|
debug_dma_map_page(dev, virt_to_page(ptr),
|
|
(unsigned long)ptr & ~PAGE_MASK, size,
|
|
dir, addr, true);
|
|
return addr;
|
|
}
|
|
|
|
static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
|
|
size_t size,
|
|
enum dma_data_direction dir,
|
|
struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->unmap_page)
|
|
ops->unmap_page(dev, addr, size, dir, attrs);
|
|
debug_dma_unmap_page(dev, addr, size, dir, true);
|
|
}
|
|
|
|
static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
|
|
int nents, enum dma_data_direction dir,
|
|
struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
int i, ents;
|
|
struct scatterlist *s;
|
|
|
|
for_each_sg(sg, s, nents, i)
|
|
kmemcheck_mark_initialized(sg_virt(s), s->length);
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
ents = ops->map_sg(dev, sg, nents, dir, attrs);
|
|
debug_dma_map_sg(dev, sg, nents, ents, dir);
|
|
|
|
return ents;
|
|
}
|
|
|
|
static inline void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
|
|
int nents, enum dma_data_direction dir,
|
|
struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
debug_dma_unmap_sg(dev, sg, nents, dir);
|
|
if (ops->unmap_sg)
|
|
ops->unmap_sg(dev, sg, nents, dir, attrs);
|
|
}
|
|
|
|
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
|
|
size_t offset, size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
dma_addr_t addr;
|
|
|
|
kmemcheck_mark_initialized(page_address(page) + offset, size);
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
addr = ops->map_page(dev, page, offset, size, dir, NULL);
|
|
debug_dma_map_page(dev, page, offset, size, dir, addr, false);
|
|
|
|
return addr;
|
|
}
|
|
|
|
static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
|
|
size_t size, enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->unmap_page)
|
|
ops->unmap_page(dev, addr, size, dir, NULL);
|
|
debug_dma_unmap_page(dev, addr, size, dir, false);
|
|
}
|
|
|
|
static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
|
|
size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_single_for_cpu)
|
|
ops->sync_single_for_cpu(dev, addr, size, dir);
|
|
debug_dma_sync_single_for_cpu(dev, addr, size, dir);
|
|
}
|
|
|
|
static inline void dma_sync_single_for_device(struct device *dev,
|
|
dma_addr_t addr, size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_single_for_device)
|
|
ops->sync_single_for_device(dev, addr, size, dir);
|
|
debug_dma_sync_single_for_device(dev, addr, size, dir);
|
|
}
|
|
|
|
static inline void dma_sync_single_range_for_cpu(struct device *dev,
|
|
dma_addr_t addr,
|
|
unsigned long offset,
|
|
size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_single_range_for_cpu) {
|
|
ops->sync_single_range_for_cpu(dev, addr, offset, size, dir);
|
|
debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir);
|
|
|
|
} else
|
|
dma_sync_single_for_cpu(dev, addr, size, dir);
|
|
}
|
|
|
|
static inline void dma_sync_single_range_for_device(struct device *dev,
|
|
dma_addr_t addr,
|
|
unsigned long offset,
|
|
size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_single_range_for_device) {
|
|
ops->sync_single_range_for_device(dev, addr, offset, size, dir);
|
|
debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir);
|
|
|
|
} else
|
|
dma_sync_single_for_device(dev, addr, size, dir);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
|
|
int nelems, enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_sg_for_cpu)
|
|
ops->sync_sg_for_cpu(dev, sg, nelems, dir);
|
|
debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
|
|
int nelems, enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_sg_for_device)
|
|
ops->sync_sg_for_device(dev, sg, nelems, dir);
|
|
debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
|
|
|
|
}
|
|
|
|
#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
|
|
#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
|
|
#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
|
|
#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
|
|
|
|
#endif
|