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[POWERPC] Implement pci_set_dma_mask() in terms of the dma_ops 

PowerPC currently doesn't implement pci_set_dma_mask(), which means drivers
calling it will get the generic version in drivers/pci/pci.c.

The powerpc dma mapping ops include a dma_set_mask() hook, which luckily is
not implemented by anyone - so there is no bug in the fact that the hook
is currently never called.

However in future we'll add implementation(s) of dma_set_mask(), and so we
need pci_set_dma_mask() to call the hook.

To save adding a hook to the dma mapping ops, pci-set_consistent_dma_mask()
simply calls the dma_set_mask() hook and then copies the new mask into
dev.coherenet_dma_mask.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman 2007-12-17 17:35:53 +11:00 committed by Paul Mackerras
parent 53024fe250
commit 84631f37cc
2 changed files with 19 additions and 0 deletions
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16
arch/powerpc/kernel/pci_64.c
View File

@ -69,6 +69,22 @@ struct dma_mapping_ops *get_pci_dma_ops(void)
}
EXPORT_SYMBOL(get_pci_dma_ops);
int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
{
return dma_set_mask(&dev->dev, mask);
}
int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
{
int rc;
rc = dma_set_mask(&dev->dev, mask);
dev->dev.coherent_dma_mask = dev->dma_mask;
return rc;
}
static void fixup_broken_pcnet32(struct pci_dev* dev)
{
if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {

3
include/asm-powerpc/dma-mapping.h
View File

@ -87,6 +87,9 @@ static inline int dma_supported(struct device *dev, u64 mask)
return dma_ops->dma_supported(dev, mask);
}
/* We have our own implementation of pci_set_dma_mask() */
#define HAVE_ARCH_PCI_SET_DMA_MASK
static inline int dma_set_mask(struct device *dev, u64 dma_mask)
{
struct dma_mapping_ops *dma_ops = get_dma_ops(dev);