diff options
Diffstat (limited to 'arch/tile/kernel/pci-dma.c')
| -rw-r--r-- | arch/tile/kernel/pci-dma.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/tile/kernel/pci-dma.c b/arch/tile/kernel/pci-dma.c index d94f4872e94f..09b58703ac26 100644 --- a/arch/tile/kernel/pci-dma.c +++ b/arch/tile/kernel/pci-dma.c @@ -588,15 +588,18 @@ int dma_set_coherent_mask(struct device *dev, u64 mask) { struct dma_map_ops *dma_ops = get_dma_ops(dev); - /* Handle hybrid PCI devices with limited memory addressability. */ - if ((dma_ops == gx_pci_dma_map_ops || - dma_ops == gx_hybrid_pci_dma_map_ops || - dma_ops == gx_legacy_pci_dma_map_ops) && - (mask <= DMA_BIT_MASK(32))) { - if (dma_ops == gx_pci_dma_map_ops) - set_dma_ops(dev, gx_hybrid_pci_dma_map_ops); - - if (mask > dev->archdata.max_direct_dma_addr) + /* + * For PCI devices with 64-bit DMA addressing capability, promote + * the dma_ops to full capability for both streams and consistent + * memory access. For 32-bit capable devices, limit the consistent + * memory DMA range to max_direct_dma_addr. + */ + if (dma_ops == gx_pci_dma_map_ops || + dma_ops == gx_hybrid_pci_dma_map_ops || + dma_ops == gx_legacy_pci_dma_map_ops) { + if (mask == DMA_BIT_MASK(64)) + set_dma_ops(dev, gx_pci_dma_map_ops); + else if (mask > dev->archdata.max_direct_dma_addr) mask = dev->archdata.max_direct_dma_addr; } |