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sparc: Use asm-generic/pci-dma-compat

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This converts SPARC to use asm-generic/pci-dma-compat instead
of the homegrown mechnism.

SPARC32 has two dma_map_ops structures for pci and sbus
(removing arch/sparc/kernel/dma.c, PCI and SBUS DMA accessor).
The global 'dma_ops' is set to sbus_dma_ops and get_dma_ops()
returns pci32_dma_ops for pci devices so we can use the
appropriate dma mapping operations.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Tested-by: Robert Reif <reif@earthlink.net>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
LKML-Reference: <1249872797-1314-8-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
FUJITA Tomonori 2009-08-10 11:53:16 +09:00 • committed by Ingo Molnar
parent c2c07dbd87
commit ee664a9252
9 changed files with 96 additions and 444 deletions
Download patch file Download diff file Expand all files Collapse all files

155
arch/sparc/kernel/dma.c
View file

@ -13,13 +13,17 @@
#include <linux/pci.h>
#endif
#include "dma.h"
/*
* Return whether the given PCI device DMA address mask can be
* supported properly. For example, if your device can only drive the
* low 24-bits during PCI bus mastering, then you would pass
* 0x00ffffff as the mask to this function.
*/
int dma_supported(struct device *dev, u64 mask)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
return pci_dma_supported(to_pci_dev(dev), mask);
return 1;
#endif
return 0;
}
@ -34,148 +38,3 @@ int dma_set_mask(struct device *dev, u64 dma_mask)
return -EOPNOTSUPP;
}
EXPORT_SYMBOL(dma_set_mask);
static void *dma32_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
#endif
return sbus_alloc_consistent(dev, size, dma_handle);
}
static void dma32_free_coherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_handle)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_free_consistent(to_pci_dev(dev), size,
cpu_addr, dma_handle);
return;
}
#endif
sbus_free_consistent(dev, size, cpu_addr, dma_handle);
}
static dma_addr_t dma32_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction direction,
struct dma_attrs *attrs)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
return pci_map_page(to_pci_dev(dev), page, offset,
size, (int)direction);
#endif
return sbus_map_page(dev, page, offset, size, (int)direction);
}
static void dma32_unmap_page(struct device *dev, dma_addr_t dma_address,
size_t size, enum dma_data_direction direction,
struct dma_attrs *attrs)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_unmap_page(to_pci_dev(dev), dma_address,
size, (int)direction);
return;
}
#endif
sbus_unmap_page(dev, dma_address, size, (int)direction);
}
static int dma32_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction direction,
struct dma_attrs *attrs)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
#endif
return sbus_map_sg(dev, sg, nents, direction);
}
void dma32_unmap_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction direction,
struct dma_attrs *attrs)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_unmap_sg(to_pci_dev(dev), sg, nents, (int)direction);
return;
}
#endif
sbus_unmap_sg(dev, sg, nents, (int)direction);
}
static void dma32_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size,
enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
size, (int)direction);
return;
}
#endif
sbus_dma_sync_single_for_cpu(dev, dma_handle, size, (int) direction);
}
static void dma32_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
size, (int)direction);
return;
}
#endif
sbus_dma_sync_single_for_device(dev, dma_handle, size, (int) direction);
}
static void dma32_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int nelems, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg,
nelems, (int)direction);
return;
}
#endif
BUG();
}
static void dma32_sync_sg_for_device(struct device *dev,
struct scatterlist *sg, int nelems,
enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_dma_sync_sg_for_device(to_pci_dev(dev), sg,
nelems, (int)direction);
return;
}
#endif
BUG();
}
static struct dma_map_ops dma32_dma_ops = {
.alloc_coherent = dma32_alloc_coherent,
.free_coherent = dma32_free_coherent,
.map_page = dma32_map_page,
.unmap_page = dma32_unmap_page,
.map_sg = dma32_map_sg,
.unmap_sg = dma32_unmap_sg,
.sync_single_for_cpu = dma32_sync_single_for_cpu,
.sync_single_for_device = dma32_sync_single_for_device,
.sync_sg_for_cpu = dma32_sync_sg_for_cpu,
.sync_sg_for_device = dma32_sync_sg_for_device,
};
struct dma_map_ops *dma_ops = &dma32_dma_ops;
EXPORT_SYMBOL(dma_ops);