x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Al Viro
H. Peter Anvin
308
arch/x86/include/asm/dma-mapping.h
Normal file
308
arch/x86/include/asm/dma-mapping.h
Normal file
@@ -0,0 +1,308 @@
|
||||
#ifndef ASM_X86__DMA_MAPPING_H
|
||||
#define ASM_X86__DMA_MAPPING_H
|
||||
|
||||
/*
|
||||
* IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
|
||||
* documentation.
|
||||
*/
|
||||
|
||||
#include <linux/scatterlist.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/swiotlb.h>
|
||||
#include <asm-generic/dma-coherent.h>
|
||||
|
||||
extern dma_addr_t bad_dma_address;
|
||||
extern int iommu_merge;
|
||||
extern struct device x86_dma_fallback_dev;
|
||||
extern int panic_on_overflow;
|
||||
|
||||
struct dma_mapping_ops {
|
||||
int (*mapping_error)(struct device *dev,
|
||||
dma_addr_t dma_addr);
|
||||
void* (*alloc_coherent)(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_handle, gfp_t gfp);
|
||||
void (*free_coherent)(struct device *dev, size_t size,
|
||||
void *vaddr, dma_addr_t dma_handle);
|
||||
dma_addr_t (*map_single)(struct device *hwdev, phys_addr_t ptr,
|
||||
size_t size, int direction);
|
||||
void (*unmap_single)(struct device *dev, dma_addr_t addr,
|
||||
size_t size, int direction);
|
||||
void (*sync_single_for_cpu)(struct device *hwdev,
|
||||
dma_addr_t dma_handle, size_t size,
|
||||
int direction);
|
||||
void (*sync_single_for_device)(struct device *hwdev,
|
||||
dma_addr_t dma_handle, size_t size,
|
||||
int direction);
|
||||
void (*sync_single_range_for_cpu)(struct device *hwdev,
|
||||
dma_addr_t dma_handle, unsigned long offset,
|
||||
size_t size, int direction);
|
||||
void (*sync_single_range_for_device)(struct device *hwdev,
|
||||
dma_addr_t dma_handle, unsigned long offset,
|
||||
size_t size, int direction);
|
||||
void (*sync_sg_for_cpu)(struct device *hwdev,
|
||||
struct scatterlist *sg, int nelems,
|
||||
int direction);
|
||||
void (*sync_sg_for_device)(struct device *hwdev,
|
||||
struct scatterlist *sg, int nelems,
|
||||
int direction);
|
||||
int (*map_sg)(struct device *hwdev, struct scatterlist *sg,
|
||||
int nents, int direction);
|
||||
void (*unmap_sg)(struct device *hwdev,
|
||||
struct scatterlist *sg, int nents,
|
||||
int direction);
|
||||
int (*dma_supported)(struct device *hwdev, u64 mask);
|
||||
int is_phys;
|
||||
};
|
||||
|
||||
extern struct dma_mapping_ops *dma_ops;
|
||||
|
||||
static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
|
||||
{
|
||||
#ifdef CONFIG_X86_32
|
||||
return dma_ops;
|
||||
#else
|
||||
if (unlikely(!dev) || !dev->archdata.dma_ops)
|
||||
return dma_ops;
|
||||
else
|
||||
return dev->archdata.dma_ops;
|
||||
#endif /* ASM_X86__DMA_MAPPING_H */
|
||||
}
|
||||
|
||||
/* Make sure we keep the same behaviour */
|
||||
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
|
||||
{
|
||||
#ifdef CONFIG_X86_32
|
||||
return 0;
|
||||
#else
|
||||
struct dma_mapping_ops *ops = get_dma_ops(dev);
|
||||
if (ops->mapping_error)
|
||||
return ops->mapping_error(dev, dma_addr);
|
||||
|
||||
return (dma_addr == bad_dma_address);
|
||||
#endif
|
||||
}
|
||||
|
||||
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
|
||||
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
|
||||
#define dma_is_consistent(d, h) (1)
|
||||
|
||||
extern int dma_supported(struct device *hwdev, u64 mask);
|
||||
extern int dma_set_mask(struct device *dev, u64 mask);
|
||||
|
||||
extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_addr, gfp_t flag);
|
||||
|
||||
static inline dma_addr_t
|
||||
dma_map_single(struct device *hwdev, void *ptr, size_t size,
|
||||
int direction)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
return ops->map_single(hwdev, virt_to_phys(ptr), size, direction);
|
||||
}
|
||||
|
||||
static inline void
|
||||
dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
|
||||
int direction)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(dev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
if (ops->unmap_single)
|
||||
ops->unmap_single(dev, addr, size, direction);
|
||||
}
|
||||
|
||||
static inline int
|
||||
dma_map_sg(struct device *hwdev, struct scatterlist *sg,
|
||||
int nents, int direction)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
return ops->map_sg(hwdev, sg, nents, direction);
|
||||
}
|
||||
|
||||
static inline void
|
||||
dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
|
||||
int direction)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
if (ops->unmap_sg)
|
||||
ops->unmap_sg(hwdev, sg, nents, direction);
|
||||
}
|
||||
|
||||
static inline void
|
||||
dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
|
||||
size_t size, int direction)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
if (ops->sync_single_for_cpu)
|
||||
ops->sync_single_for_cpu(hwdev, dma_handle, size, direction);
|
||||
flush_write_buffers();
|
||||
}
|
||||
|
||||
static inline void
|
||||
dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
|
||||
size_t size, int direction)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
if (ops->sync_single_for_device)
|
||||
ops->sync_single_for_device(hwdev, dma_handle, size, direction);
|
||||
flush_write_buffers();
|
||||
}
|
||||
|
||||
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)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
if (ops->sync_single_range_for_cpu)
|
||||
ops->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)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
if (ops->sync_single_range_for_device)
|
||||
ops->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,
|
||||
int nelems, int direction)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
if (ops->sync_sg_for_cpu)
|
||||
ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
|
||||
flush_write_buffers();
|
||||
}
|
||||
|
||||
static inline void
|
||||
dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
|
||||
int nelems, int direction)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(hwdev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
if (ops->sync_sg_for_device)
|
||||
ops->sync_sg_for_device(hwdev, sg, nelems, direction);
|
||||
|
||||
flush_write_buffers();
|
||||
}
|
||||
|
||||
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
|
||||
size_t offset, size_t size,
|
||||
int direction)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(dev);
|
||||
|
||||
BUG_ON(!valid_dma_direction(direction));
|
||||
return ops->map_single(dev, page_to_phys(page) + offset,
|
||||
size, direction);
|
||||
}
|
||||
|
||||
static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
|
||||
size_t size, int direction)
|
||||
{
|
||||
dma_unmap_single(dev, addr, size, direction);
|
||||
}
|
||||
|
||||
static inline void
|
||||
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
flush_write_buffers();
|
||||
}
|
||||
|
||||
static inline int dma_get_cache_alignment(void)
|
||||
{
|
||||
/* no easy way to get cache size on all x86, so return the
|
||||
* maximum possible, to be safe */
|
||||
return boot_cpu_data.x86_clflush_size;
|
||||
}
|
||||
|
||||
static inline unsigned long dma_alloc_coherent_mask(struct device *dev,
|
||||
gfp_t gfp)
|
||||
{
|
||||
unsigned long dma_mask = 0;
|
||||
|
||||
dma_mask = dev->coherent_dma_mask;
|
||||
if (!dma_mask)
|
||||
dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK;
|
||||
|
||||
return dma_mask;
|
||||
}
|
||||
|
||||
static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp)
|
||||
{
|
||||
#ifdef CONFIG_X86_64
|
||||
unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp);
|
||||
|
||||
if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA))
|
||||
gfp |= GFP_DMA32;
|
||||
#endif
|
||||
return gfp;
|
||||
}
|
||||
|
||||
static inline void *
|
||||
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
|
||||
gfp_t gfp)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(dev);
|
||||
void *memory;
|
||||
|
||||
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
|
||||
|
||||
if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
|
||||
return memory;
|
||||
|
||||
if (!dev) {
|
||||
dev = &x86_dma_fallback_dev;
|
||||
gfp |= GFP_DMA;
|
||||
}
|
||||
|
||||
if (!is_device_dma_capable(dev))
|
||||
return NULL;
|
||||
|
||||
if (!ops->alloc_coherent)
|
||||
return NULL;
|
||||
|
||||
return ops->alloc_coherent(dev, size, dma_handle,
|
||||
dma_alloc_coherent_gfp_flags(dev, gfp));
|
||||
}
|
||||
|
||||
static inline void dma_free_coherent(struct device *dev, size_t size,
|
||||
void *vaddr, dma_addr_t bus)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(dev);
|
||||
|
||||
WARN_ON(irqs_disabled()); /* for portability */
|
||||
|
||||
if (dma_release_from_coherent(dev, get_order(size), vaddr))
|
||||
return;
|
||||
|
||||
if (ops->free_coherent)
|
||||
ops->free_coherent(dev, size, vaddr, bus);
|
||||
}
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user