1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
309 lines
7.1 KiB
C
309 lines
7.1 KiB
C
/* Copyright (C) 2002 by James.Bottomley@HansenPartnership.com
|
|
*
|
|
* Implements the generic device dma API via the existing pci_ one
|
|
* for unconverted architectures
|
|
*/
|
|
|
|
#ifndef _ASM_GENERIC_DMA_MAPPING_H
|
|
#define _ASM_GENERIC_DMA_MAPPING_H
|
|
|
|
#include <linux/config.h>
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
/* we implement the API below in terms of the existing PCI one,
|
|
* so include it */
|
|
#include <linux/pci.h>
|
|
/* need struct page definitions */
|
|
#include <linux/mm.h>
|
|
|
|
static inline int
|
|
dma_supported(struct device *dev, u64 mask)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
return pci_dma_supported(to_pci_dev(dev), mask);
|
|
}
|
|
|
|
static inline int
|
|
dma_set_mask(struct device *dev, u64 dma_mask)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
|
|
}
|
|
|
|
static inline void *
|
|
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
|
|
unsigned int __nocast flag)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
|
|
}
|
|
|
|
static inline void
|
|
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
|
|
dma_addr_t dma_handle)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle);
|
|
}
|
|
|
|
static inline dma_addr_t
|
|
dma_map_single(struct device *dev, void *cpu_addr, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction);
|
|
}
|
|
|
|
static inline void
|
|
dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction);
|
|
}
|
|
|
|
static inline dma_addr_t
|
|
dma_map_page(struct device *dev, struct page *page,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction);
|
|
}
|
|
|
|
static inline void
|
|
dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction);
|
|
}
|
|
|
|
static inline int
|
|
dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
|
|
}
|
|
|
|
static inline void
|
|
dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
|
|
size, (int)direction);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
|
|
size, (int)direction);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG_ON(dev->bus != &pci_bus_type);
|
|
|
|
pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction);
|
|
}
|
|
|
|
static inline int
|
|
dma_mapping_error(dma_addr_t dma_addr)
|
|
{
|
|
return pci_dma_mapping_error(dma_addr);
|
|
}
|
|
|
|
|
|
#else
|
|
|
|
static inline int
|
|
dma_supported(struct device *dev, u64 mask)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
dma_set_mask(struct device *dev, u64 dma_mask)
|
|
{
|
|
BUG();
|
|
return 0;
|
|
}
|
|
|
|
static inline void *
|
|
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
|
|
unsigned int __nocast flag)
|
|
{
|
|
BUG();
|
|
return NULL;
|
|
}
|
|
|
|
static inline void
|
|
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
|
|
dma_addr_t dma_handle)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
static inline dma_addr_t
|
|
dma_map_single(struct device *dev, void *cpu_addr, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG();
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
static inline dma_addr_t
|
|
dma_map_page(struct device *dev, struct page *page,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG();
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
static inline int
|
|
dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG();
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
|
|
enum dma_data_direction direction)
|
|
{
|
|
BUG();
|
|
}
|
|
|
|
static inline int
|
|
dma_error(dma_addr_t dma_addr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
/* Now for the API extensions over the pci_ one */
|
|
|
|
#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) (1)
|
|
|
|
static inline int
|
|
dma_get_cache_alignment(void)
|
|
{
|
|
/* no easy way to get cache size on all processors, so return
|
|
* the maximum possible, to be safe */
|
|
return (1 << L1_CACHE_SHIFT_MAX);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
/* just sync everything, that's all the pci API can do */
|
|
dma_sync_single_for_cpu(dev, dma_handle, offset+size, direction);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
/* just sync everything, that's all the pci API can do */
|
|
dma_sync_single_for_device(dev, dma_handle, offset+size, direction);
|
|
}
|
|
|
|
static inline void
|
|
dma_cache_sync(void *vaddr, size_t size,
|
|
enum dma_data_direction direction)
|
|
{
|
|
/* could define this in terms of the dma_cache ... operations,
|
|
* but if you get this on a platform, you should convert the platform
|
|
* to using the generic device DMA API */
|
|
BUG();
|
|
}
|
|
|
|
#endif
|
|
|