projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 944c67df DM |
1 | /* dma.c: PCI and SBUS DMA accessors for 32-bit sparc. |
| 2 | * | |
| 3 | * Copyright (C) 2008 David S. Miller <davem@davemloft.net> | |
| 4 | */ | |
| 5 | ||
| 6 | #include <linux/kernel.h> | |
| 7 | #include <linux/module.h> | |
| 8 | #include <linux/dma-mapping.h> | |
| 9 | #include <linux/scatterlist.h> | |
| 10 | #include <linux/mm.h> | |
| 11 | ||
| 12 | #ifdef CONFIG_PCI | |
| 13 | #include <linux/pci.h> | |
| 14 | #endif | |
| 15 | ||
| ee664a92 FT |
16 | /* |
| 17 | * Return whether the given PCI device DMA address mask can be | |
| 18 | * supported properly. For example, if your device can only drive the | |
| 19 | * low 24-bits during PCI bus mastering, then you would pass | |
| 20 | * 0x00ffffff as the mask to this function. | |
| 21 | */ | |
| 944c67df DM |
22 | int dma_supported(struct device *dev, u64 mask) |
| 23 | { | |
| 24 | #ifdef CONFIG_PCI | |
| 25 | if (dev->bus == &pci_bus_type) | |
| ee664a92 | 26 | return 1; |
| 944c67df DM |
27 | #endif |
| 28 | return 0; | |
| 29 | } | |
| 30 | EXPORT_SYMBOL(dma_supported); | |
| 31 | ||
| 32 | int dma_set_mask(struct device *dev, u64 dma_mask) | |
| 33 | { | |
| 34 | #ifdef CONFIG_PCI | |
| 35 | if (dev->bus == &pci_bus_type) | |
| 36 | return pci_set_dma_mask(to_pci_dev(dev), dma_mask); | |
| 37 | #endif | |
| 38 | return -EOPNOTSUPP; | |
| 39 | } | |
| 40 | EXPORT_SYMBOL(dma_set_mask); |