size = PAGE_ALIGN(size);
order = get_order(size);
- flags &= ~(GFP_DMA | GFP_DMA32);
+
+ if (!iommu_no_mapping(hwdev))
+ flags &= ~(GFP_DMA | GFP_DMA32);
+ else if (hwdev->coherent_dma_mask < dma_get_required_mask(hwdev)) {
+ if (hwdev->coherent_dma_mask < DMA_BIT_MASK(32))
+ flags |= GFP_DMA;
+ else
+ flags |= GFP_DMA32;
+ }
vaddr = (void *)__get_free_pages(flags, order);
if (!vaddr)
}
#endif /* CONFIG_PM */
+/*
+ * Here we only respond to action of unbound device from driver.
+ *
+ * Added device is not attached to its DMAR domain here yet. That will happen
+ * when mapping the device to iova.
+ */
+static int device_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct device *dev = data;
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct dmar_domain *domain;
+
+ domain = find_domain(pdev);
+ if (!domain)
+ return 0;
+
+ if (action == BUS_NOTIFY_UNBOUND_DRIVER && !iommu_pass_through)
+ domain_remove_one_dev_info(domain, pdev);
+
+ return 0;
+}
+
+static struct notifier_block device_nb = {
+ .notifier_call = device_notifier,
+};
+
int __init intel_iommu_init(void)
{
int ret = 0;
* Check the need for DMA-remapping initialization now.
* Above initialization will also be used by Interrupt-remapping.
*/
- if (no_iommu || swiotlb || dmar_disabled)
+ if (no_iommu || dmar_disabled)
return -ENODEV;
iommu_init_mempool();
"PCI-DMA: Intel(R) Virtualization Technology for Directed I/O\n");
init_timer(&unmap_timer);
- force_iommu = 1;
+#ifdef CONFIG_SWIOTLB
+ swiotlb = 0;
+#endif
dma_ops = &intel_dma_ops;
init_iommu_sysfs();
register_iommu(&intel_iommu_ops);
+ bus_register_notifier(&pci_bus_type, &device_nb);
+
return 0;
}