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powerpc/dma: stop overriding dma_get_required_mask

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The ppc_md and pci_controller_ops methods are unused now and can be
removed.  The dma_nommu implementation is generic to the generic one
except for using max_pfn instead of calling into the memblock API,
and all other dma_map_ops instances implement a method of their own.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christoph Hellwig
2019-02-18 22:41:03 +11:00
committed by Michael Ellerman
parent 2d6ad41b2c
commit ffe3dfd4e3
6 changed files with 0 additions and 38 deletions
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arch/powerpc/kernel/dma.c
-29
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@@ -318,35 +318,6 @@ int dma_set_mask(struct device *dev, u64 dma_mask)
}
EXPORT_SYMBOL(dma_set_mask);
u64 __dma_get_required_mask(struct device *dev)
{
const struct dma_map_ops *dma_ops = get_dma_ops(dev);
if (unlikely(dma_ops == NULL))
return 0;
if (dma_ops->get_required_mask)
return dma_ops->get_required_mask(dev);
return DMA_BIT_MASK(8 * sizeof(dma_addr_t));
}
u64 dma_get_required_mask(struct device *dev)
{
if (ppc_md.dma_get_required_mask)
return ppc_md.dma_get_required_mask(dev);
if (dev_is_pci(dev)) {
struct pci_dev *pdev = to_pci_dev(dev);
struct pci_controller *phb = pci_bus_to_host(pdev->bus);
if (phb->controller_ops.dma_get_required_mask)
return phb->controller_ops.dma_get_required_mask(pdev);
}
return __dma_get_required_mask(dev);
}
EXPORT_SYMBOL_GPL(dma_get_required_mask);
static int __init dma_init(void)
{
#ifdef CONFIG_IBMVIO