2008-10-23 13:26:29 +08:00
|
|
|
#ifndef _ASM_X86_DMA_MAPPING_H
|
|
|
|
#define _ASM_X86_DMA_MAPPING_H
|
2008-03-26 05:36:20 +08:00
|
|
|
|
|
|
|
/*
|
2009-01-30 08:28:02 +08:00
|
|
|
* IOMMU interface. See Documentation/PCI/PCI-DMA-mapping.txt and
|
|
|
|
* Documentation/DMA-API.txt for documentation.
|
2008-03-26 05:36:20 +08:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/scatterlist.h>
|
2009-01-09 22:13:15 +08:00
|
|
|
#include <linux/dma-debug.h>
|
2009-01-05 22:47:21 +08:00
|
|
|
#include <linux/dma-attrs.h>
|
2008-03-26 05:36:20 +08:00
|
|
|
#include <asm/io.h>
|
|
|
|
#include <asm/swiotlb.h>
|
2008-08-19 22:32:45 +08:00
|
|
|
#include <asm-generic/dma-coherent.h>
|
2008-03-26 05:36:20 +08:00
|
|
|
|
2008-03-26 05:36:36 +08:00
|
|
|
extern dma_addr_t bad_dma_address;
|
2008-03-26 05:36:39 +08:00
|
|
|
extern int iommu_merge;
|
2008-08-19 22:32:45 +08:00
|
|
|
extern struct device x86_dma_fallback_dev;
|
2008-03-26 05:36:39 +08:00
|
|
|
extern int panic_on_overflow;
|
2008-03-26 05:36:36 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
extern struct dma_map_ops *dma_ops;
|
|
|
|
|
|
|
|
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
|
2008-03-26 05:36:37 +08:00
|
|
|
{
|
2008-07-26 10:44:49 +08:00
|
|
|
#ifdef CONFIG_X86_32
|
|
|
|
return dma_ops;
|
|
|
|
#else
|
|
|
|
if (unlikely(!dev) || !dev->archdata.dma_ops)
|
|
|
|
return dma_ops;
|
|
|
|
else
|
|
|
|
return dev->archdata.dma_ops;
|
2008-12-17 04:17:36 +08:00
|
|
|
#endif
|
2008-07-26 10:44:49 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Make sure we keep the same behaviour */
|
|
|
|
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
|
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
2008-07-26 10:44:49 +08:00
|
|
|
if (ops->mapping_error)
|
|
|
|
return ops->mapping_error(dev, dma_addr);
|
2008-03-26 05:36:37 +08:00
|
|
|
|
2008-11-29 20:46:27 +08:00
|
|
|
return (dma_addr == bad_dma_address);
|
2008-03-26 05:36:37 +08:00
|
|
|
}
|
|
|
|
|
2008-03-26 05:36:31 +08:00
|
|
|
#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)
|
2008-08-19 22:32:45 +08:00
|
|
|
#define dma_is_consistent(d, h) (1)
|
2008-03-26 05:36:31 +08:00
|
|
|
|
2008-03-26 05:36:34 +08:00
|
|
|
extern int dma_supported(struct device *hwdev, u64 mask);
|
|
|
|
extern int dma_set_mask(struct device *dev, u64 mask);
|
|
|
|
|
2008-09-24 19:48:35 +08:00
|
|
|
extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
|
|
|
|
dma_addr_t *dma_addr, gfp_t flag);
|
|
|
|
|
2008-03-26 05:36:21 +08:00
|
|
|
static inline dma_addr_t
|
|
|
|
dma_map_single(struct device *hwdev, void *ptr, size_t size,
|
2009-01-05 22:59:02 +08:00
|
|
|
enum dma_data_direction dir)
|
2008-03-26 05:36:21 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(hwdev);
|
2009-01-09 22:13:15 +08:00
|
|
|
dma_addr_t addr;
|
2008-07-26 10:44:49 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2009-01-09 22:13:15 +08:00
|
|
|
addr = ops->map_page(hwdev, virt_to_page(ptr),
|
2009-01-05 22:47:28 +08:00
|
|
|
(unsigned long)ptr & ~PAGE_MASK, size,
|
2009-01-05 22:59:02 +08:00
|
|
|
dir, NULL);
|
2009-01-09 22:13:15 +08:00
|
|
|
debug_dma_map_page(hwdev, virt_to_page(ptr),
|
|
|
|
(unsigned long)ptr & ~PAGE_MASK, size,
|
|
|
|
dir, addr, true);
|
|
|
|
return addr;
|
2008-03-26 05:36:21 +08:00
|
|
|
}
|
|
|
|
|
2008-03-26 05:36:22 +08:00
|
|
|
static inline void
|
|
|
|
dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
|
2009-01-05 22:59:02 +08:00
|
|
|
enum dma_data_direction dir)
|
2008-03-26 05:36:22 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
2008-07-26 10:44:49 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2009-01-05 22:47:28 +08:00
|
|
|
if (ops->unmap_page)
|
2009-01-05 22:59:02 +08:00
|
|
|
ops->unmap_page(dev, addr, size, dir, NULL);
|
2009-01-09 22:13:15 +08:00
|
|
|
debug_dma_unmap_page(dev, addr, size, dir, true);
|
2008-03-26 05:36:22 +08:00
|
|
|
}
|
|
|
|
|
2008-03-26 05:36:23 +08:00
|
|
|
static inline int
|
|
|
|
dma_map_sg(struct device *hwdev, struct scatterlist *sg,
|
2009-01-05 22:59:02 +08:00
|
|
|
int nents, enum dma_data_direction dir)
|
2008-03-26 05:36:23 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(hwdev);
|
2009-01-09 22:13:15 +08:00
|
|
|
int ents;
|
2008-07-26 10:44:49 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2009-01-09 22:13:15 +08:00
|
|
|
ents = ops->map_sg(hwdev, sg, nents, dir, NULL);
|
|
|
|
debug_dma_map_sg(hwdev, sg, nents, ents, dir);
|
|
|
|
|
|
|
|
return ents;
|
2008-03-26 05:36:23 +08:00
|
|
|
}
|
2008-03-26 05:36:24 +08:00
|
|
|
|
|
|
|
static inline void
|
|
|
|
dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
|
2009-01-05 22:59:02 +08:00
|
|
|
enum dma_data_direction dir)
|
2008-03-26 05:36:24 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(hwdev);
|
2008-07-26 10:44:49 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2009-01-09 22:13:15 +08:00
|
|
|
debug_dma_unmap_sg(hwdev, sg, nents, dir);
|
2008-07-26 10:44:49 +08:00
|
|
|
if (ops->unmap_sg)
|
2009-01-05 22:59:02 +08:00
|
|
|
ops->unmap_sg(hwdev, sg, nents, dir, NULL);
|
2008-03-26 05:36:24 +08:00
|
|
|
}
|
2008-03-26 05:36:25 +08:00
|
|
|
|
|
|
|
static inline void
|
|
|
|
dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
|
2009-01-05 22:59:02 +08:00
|
|
|
size_t size, enum dma_data_direction dir)
|
2008-03-26 05:36:25 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(hwdev);
|
2008-07-26 10:44:49 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2008-07-26 10:44:49 +08:00
|
|
|
if (ops->sync_single_for_cpu)
|
2009-01-05 22:59:02 +08:00
|
|
|
ops->sync_single_for_cpu(hwdev, dma_handle, size, dir);
|
2009-01-09 22:13:15 +08:00
|
|
|
debug_dma_sync_single_for_cpu(hwdev, dma_handle, size, dir);
|
2008-03-26 05:36:25 +08:00
|
|
|
flush_write_buffers();
|
|
|
|
}
|
|
|
|
|
2008-03-26 05:36:26 +08:00
|
|
|
static inline void
|
|
|
|
dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
|
2009-01-05 22:59:02 +08:00
|
|
|
size_t size, enum dma_data_direction dir)
|
2008-03-26 05:36:26 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(hwdev);
|
2008-07-26 10:44:49 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2008-07-26 10:44:49 +08:00
|
|
|
if (ops->sync_single_for_device)
|
2009-01-05 22:59:02 +08:00
|
|
|
ops->sync_single_for_device(hwdev, dma_handle, size, dir);
|
2009-01-09 22:13:15 +08:00
|
|
|
debug_dma_sync_single_for_device(hwdev, dma_handle, size, dir);
|
2008-03-26 05:36:26 +08:00
|
|
|
flush_write_buffers();
|
|
|
|
}
|
|
|
|
|
2008-03-26 05:36:27 +08:00
|
|
|
static inline void
|
|
|
|
dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
|
2009-01-05 22:59:02 +08:00
|
|
|
unsigned long offset, size_t size,
|
|
|
|
enum dma_data_direction dir)
|
2008-03-26 05:36:27 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(hwdev);
|
2008-03-26 05:36:27 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2008-07-26 10:44:49 +08:00
|
|
|
if (ops->sync_single_range_for_cpu)
|
|
|
|
ops->sync_single_range_for_cpu(hwdev, dma_handle, offset,
|
2009-01-05 22:59:02 +08:00
|
|
|
size, dir);
|
2009-01-09 22:13:15 +08:00
|
|
|
debug_dma_sync_single_range_for_cpu(hwdev, dma_handle,
|
|
|
|
offset, size, dir);
|
2008-03-26 05:36:27 +08:00
|
|
|
flush_write_buffers();
|
|
|
|
}
|
2008-03-26 05:36:28 +08:00
|
|
|
|
|
|
|
static inline void
|
|
|
|
dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
|
|
|
|
unsigned long offset, size_t size,
|
2009-01-05 22:59:02 +08:00
|
|
|
enum dma_data_direction dir)
|
2008-03-26 05:36:28 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(hwdev);
|
2008-03-26 05:36:28 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2008-07-26 10:44:49 +08:00
|
|
|
if (ops->sync_single_range_for_device)
|
|
|
|
ops->sync_single_range_for_device(hwdev, dma_handle,
|
2009-01-05 22:59:02 +08:00
|
|
|
offset, size, dir);
|
2009-01-09 22:13:15 +08:00
|
|
|
debug_dma_sync_single_range_for_device(hwdev, dma_handle,
|
|
|
|
offset, size, dir);
|
2008-03-26 05:36:28 +08:00
|
|
|
flush_write_buffers();
|
|
|
|
}
|
|
|
|
|
2008-03-26 05:36:29 +08:00
|
|
|
static inline void
|
|
|
|
dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
|
2009-01-05 22:59:02 +08:00
|
|
|
int nelems, enum dma_data_direction dir)
|
2008-03-26 05:36:29 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(hwdev);
|
2008-07-26 10:44:49 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2008-07-26 10:44:49 +08:00
|
|
|
if (ops->sync_sg_for_cpu)
|
2009-01-05 22:59:02 +08:00
|
|
|
ops->sync_sg_for_cpu(hwdev, sg, nelems, dir);
|
2009-01-09 22:13:15 +08:00
|
|
|
debug_dma_sync_sg_for_cpu(hwdev, sg, nelems, dir);
|
2008-03-26 05:36:29 +08:00
|
|
|
flush_write_buffers();
|
|
|
|
}
|
2008-03-26 05:36:30 +08:00
|
|
|
|
|
|
|
static inline void
|
|
|
|
dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
|
2009-01-05 22:59:02 +08:00
|
|
|
int nelems, enum dma_data_direction dir)
|
2008-03-26 05:36:30 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(hwdev);
|
2008-07-26 10:44:49 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2008-07-26 10:44:49 +08:00
|
|
|
if (ops->sync_sg_for_device)
|
2009-01-05 22:59:02 +08:00
|
|
|
ops->sync_sg_for_device(hwdev, sg, nelems, dir);
|
2009-01-09 22:13:15 +08:00
|
|
|
debug_dma_sync_sg_for_device(hwdev, sg, nelems, dir);
|
2008-03-26 05:36:30 +08:00
|
|
|
|
|
|
|
flush_write_buffers();
|
|
|
|
}
|
2008-03-26 05:36:32 +08:00
|
|
|
|
|
|
|
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
|
|
|
|
size_t offset, size_t size,
|
2009-01-05 22:59:02 +08:00
|
|
|
enum dma_data_direction dir)
|
2008-03-26 05:36:32 +08:00
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
2009-01-09 22:13:15 +08:00
|
|
|
dma_addr_t addr;
|
2008-07-26 10:44:49 +08:00
|
|
|
|
2009-01-05 22:59:02 +08:00
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
2009-01-09 22:13:15 +08:00
|
|
|
addr = ops->map_page(dev, page, offset, size, dir, NULL);
|
|
|
|
debug_dma_map_page(dev, page, offset, size, dir, addr, false);
|
|
|
|
|
|
|
|
return addr;
|
2008-03-26 05:36:32 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
|
2009-01-05 22:59:02 +08:00
|
|
|
size_t size, enum dma_data_direction dir)
|
2008-03-26 05:36:32 +08:00
|
|
|
{
|
2009-01-09 22:13:15 +08:00
|
|
|
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);
|
2008-03-26 05:36:32 +08:00
|
|
|
}
|
|
|
|
|
2008-03-26 05:36:33 +08:00
|
|
|
static inline void
|
|
|
|
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
|
|
|
|
enum dma_data_direction dir)
|
|
|
|
{
|
|
|
|
flush_write_buffers();
|
|
|
|
}
|
2008-03-26 05:36:38 +08:00
|
|
|
|
2008-03-26 05:36:39 +08:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2008-09-08 17:10:13 +08:00
|
|
|
static inline unsigned long dma_alloc_coherent_mask(struct device *dev,
|
|
|
|
gfp_t gfp)
|
|
|
|
{
|
|
|
|
unsigned long dma_mask = 0;
|
2008-03-26 05:36:39 +08:00
|
|
|
|
2008-09-08 17:10:13 +08:00
|
|
|
dma_mask = dev->coherent_dma_mask;
|
|
|
|
if (!dma_mask)
|
2009-04-07 10:01:18 +08:00
|
|
|
dma_mask = (gfp & GFP_DMA) ? DMA_BIT_MASK(24) : DMA_BIT_MASK(32);
|
2008-09-08 17:10:13 +08:00
|
|
|
|
|
|
|
return dma_mask;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp)
|
|
|
|
{
|
|
|
|
unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp);
|
|
|
|
|
2009-04-07 10:01:18 +08:00
|
|
|
if (dma_mask <= DMA_BIT_MASK(24))
|
2008-10-23 19:46:55 +08:00
|
|
|
gfp |= GFP_DMA;
|
|
|
|
#ifdef CONFIG_X86_64
|
2009-04-07 10:01:15 +08:00
|
|
|
if (dma_mask <= DMA_BIT_MASK(32) && !(gfp & GFP_DMA))
|
2008-09-08 17:10:13 +08:00
|
|
|
gfp |= GFP_DMA32;
|
|
|
|
#endif
|
|
|
|
return gfp;
|
|
|
|
}
|
|
|
|
|
2008-08-19 22:32:45 +08:00
|
|
|
static inline void *
|
|
|
|
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
|
|
|
|
gfp_t gfp)
|
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
2008-08-19 22:32:45 +08:00
|
|
|
void *memory;
|
|
|
|
|
2008-09-08 17:10:12 +08:00
|
|
|
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
|
|
|
|
|
2008-08-19 22:32:45 +08:00
|
|
|
if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
|
|
|
|
return memory;
|
|
|
|
|
|
|
|
if (!dev) {
|
|
|
|
dev = &x86_dma_fallback_dev;
|
|
|
|
gfp |= GFP_DMA;
|
|
|
|
}
|
|
|
|
|
2008-09-09 23:49:48 +08:00
|
|
|
if (!is_device_dma_capable(dev))
|
2008-09-08 17:10:11 +08:00
|
|
|
return NULL;
|
|
|
|
|
2008-09-08 17:10:13 +08:00
|
|
|
if (!ops->alloc_coherent)
|
|
|
|
return NULL;
|
|
|
|
|
2009-01-09 22:13:15 +08:00
|
|
|
memory = ops->alloc_coherent(dev, size, dma_handle,
|
|
|
|
dma_alloc_coherent_gfp_flags(dev, gfp));
|
|
|
|
debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
|
|
|
|
|
|
|
|
return memory;
|
2008-08-19 22:32:45 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void dma_free_coherent(struct device *dev, size_t size,
|
|
|
|
void *vaddr, dma_addr_t bus)
|
|
|
|
{
|
2009-01-05 22:59:02 +08:00
|
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
2008-08-19 22:32:45 +08:00
|
|
|
|
|
|
|
WARN_ON(irqs_disabled()); /* for portability */
|
|
|
|
|
|
|
|
if (dma_release_from_coherent(dev, get_order(size), vaddr))
|
|
|
|
return;
|
|
|
|
|
2009-01-09 22:13:15 +08:00
|
|
|
debug_dma_free_coherent(dev, size, vaddr, bus);
|
2008-08-19 22:32:45 +08:00
|
|
|
if (ops->free_coherent)
|
|
|
|
ops->free_coherent(dev, size, vaddr, bus);
|
|
|
|
}
|
2008-03-26 05:36:39 +08:00
|
|
|
|
2008-03-26 05:36:20 +08:00
|
|
|
#endif
|