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dma-mapping: alpha: use include/linux/pci-dma-compat.h

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This converts Alpha to use include/linux/pci-dma-compat.h.  Alpha is the
only architecutre that implements the PCI DMA API in the own way.  That
makes it difficult to implement the generic DMA API via the PCI bus
specific DMA API.

The generic DMA API calls the PCI DMA API implementation in
arch/alpha/kernel/pci_iommu.c on non Jensen systems.  It calls the DMA API
in arch/alpha/kernel/pci-noop.c on Jensen systems.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Greg KH <greg@kroah.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
FUJITA Tomonori
2010-03-10 15:23:37 -08:00
committed by Linus Torvalds
parent 349004294c
commit c186caca3d
5 changed files with 166 additions and 343 deletions
Download Patch File Download Diff File Expand all files Collapse all files

101
arch/alpha/kernel/pci-noop.c
View File

@@ -106,58 +106,8 @@ sys_pciconfig_write(unsigned long bus, unsigned long dfn,
return -ENODEV;
}
/* Stubs for the routines in pci_iommu.c: */
void *
__pci_alloc_consistent(struct pci_dev *pdev, size_t size,
dma_addr_t *dma_addrp, gfp_t gfp)
{
return NULL;
}
void
pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr,
dma_addr_t dma_addr)
{
}
dma_addr_t
pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size,
int direction)
{
return (dma_addr_t) 0;
}
void
pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
int direction)
{
}
int
pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
int direction)
{
return 0;
}
void
pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
int direction)
{
}
int
pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask)
{
return 0;
}
/* Generic DMA mapping functions: */
void *
dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)
static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)
{
void *ret;
@@ -171,11 +121,22 @@ dma_alloc_coherent(struct device *dev, size_t size,
return ret;
}
EXPORT_SYMBOL(dma_alloc_coherent);
static void alpha_noop_free_coherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_addr)
{
free_pages((unsigned long)cpu_addr, get_order(size));
}
int
dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
enum dma_data_direction direction)
static dma_addr_t alpha_noop_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
return page_to_pa(page) + offset;
}
static int alpha_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
enum dma_data_direction dir, struct dma_attrs *attrs)
{
int i;
struct scatterlist *sg;
@@ -192,19 +153,37 @@ dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
return nents;
}
EXPORT_SYMBOL(dma_map_sg);
static int alpha_noop_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
int
dma_set_mask(struct device *dev, u64 mask)
static int alpha_noop_supported(struct device *dev, u64 mask)
{
return mask < 0x00ffffffUL ? 0 : 1;
}
static int alpha_noop_set_mask(struct device *dev, u64 mask)
{
if (!dev->dma_mask || !dma_supported(dev, mask))
return -EIO;
*dev->dma_mask = mask;
return 0;
}
EXPORT_SYMBOL(dma_set_mask);
struct dma_map_ops alpha_noop_ops = {
.alloc_coherent = alpha_noop_alloc_coherent,
.free_coherent = alpha_noop_free_coherent,
.map_page = alpha_noop_map_page,
.map_sg = alpha_noop_map_sg,
.mapping_error = alpha_noop_mapping_error,
.dma_supported = alpha_noop_supported,
.set_dma_mask = alpha_noop_set_mask,
};
struct dma_map_ops *dma_ops = &alpha_noop_ops;
EXPORT_SYMBOL(dma_ops);
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{