| /* dma.c: PCI and SBUS DMA accessors for 32-bit sparc. |
| * |
| * Copyright (C) 2008 David S. Miller <davem@davemloft.net> |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/scatterlist.h> |
| #include <linux/mm.h> |
| |
| #ifdef CONFIG_PCI |
| #include <linux/pci.h> |
| #endif |
| |
| /* |
| * 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 1; |
| #endif |
| return 0; |
| } |
| EXPORT_SYMBOL(dma_supported); |
| |
| int dma_set_mask(struct device *dev, u64 dma_mask) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) |
| return pci_set_dma_mask(to_pci_dev(dev), dma_mask); |
| #endif |
| return -EOPNOTSUPP; |
| } |
| EXPORT_SYMBOL(dma_set_mask); |
