prot &= (HV_PCI_MAP_ATTR_READ | HV_PCI_MAP_ATTR_WRITE);
while (npages != 0) {
- if (mask <= DMA_BIT_MASK(32)) {
+ if (mask <= DMA_BIT_MASK(32) || !pbm->iommu->atu) {
num = pci_sun4v_iommu_map(devhandle,
HV_PCI_TSBID(0, entry),
npages,
atu = iommu->atu;
mask = dev->coherent_dma_mask;
- if (mask <= DMA_BIT_MASK(32))
+ if (mask <= DMA_BIT_MASK(32) || !atu)
tbl = &iommu->tbl;
else
tbl = &atu->tbl;
static int dma_4v_supported(struct device *dev, u64 device_mask)
{
struct iommu *iommu = dev->archdata.iommu;
- u64 dma_addr_mask = iommu->dma_addr_mask;
if (ali_sound_dma_hack(dev, device_mask))
return 1;
-
- if (device_mask > DMA_BIT_MASK(32)) {
- if (iommu->atu)
- dma_addr_mask = iommu->atu->dma_addr_mask;
- else
- return 0;
- }
-
- if ((device_mask & dma_addr_mask) == dma_addr_mask)
- return 1;
- return 0;
+ if (device_mask < iommu->dma_addr_mask)
+ return 0;
+ return 1;
}
static const struct dma_map_ops sun4v_dma_ops = {