diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/dmar.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index c1e2e0c..7ea086f 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -612,6 +612,79 @@ out: return dmaru; } +static void __init dmar_acpi_insert_dev_scope(u8 device_number, + struct acpi_device *adev) +{ + struct dmar_drhd_unit *dmaru; + struct acpi_dmar_hardware_unit *drhd; + struct acpi_dmar_device_scope *scope; + struct device *tmp; + int i; + struct acpi_dmar_pci_path *path; + + for_each_drhd_unit(dmaru) { + drhd = container_of(dmaru->hdr, + struct acpi_dmar_hardware_unit, + header); + + for (scope = (void *)(drhd + 1); + (unsigned long)scope < ((unsigned long)drhd) + drhd->header.length; + scope = ((void *)scope) + scope->length) { + if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_ACPI) + continue; + if (scope->enumeration_id != device_number) + continue; + + path = (void *)(scope + 1); + pr_info("ACPI device \"%s\" under DMAR at %llx as %02x:%02x.%d\n", + dev_name(&adev->dev), dmaru->reg_base_addr, + scope->bus, path->device, path->function); + for_each_dev_scope(dmaru->devices, dmaru->devices_cnt, i, tmp) + if (tmp == NULL) { + dmaru->devices[i].bus = scope->bus; + dmaru->devices[i].devfn = PCI_DEVFN(path->device, + path->function); + rcu_assign_pointer(dmaru->devices[i].dev, + get_device(&adev->dev)); + return; + } + BUG_ON(i >= dmaru->devices_cnt); + } + } + pr_warn("No IOMMU scope found for ANDD enumeration ID %d (%s)\n", + device_number, dev_name(&adev->dev)); +} + +static int __init dmar_acpi_dev_scope_init(void) +{ + struct acpi_dmar_andd *andd = (void *)dmar_tbl + sizeof(struct acpi_table_dmar); + + while (((unsigned long)andd) < + ((unsigned long)dmar_tbl) + dmar_tbl->length) { + if (andd->header.type == ACPI_DMAR_TYPE_ANDD) { + acpi_handle h; + struct acpi_device *adev; + + if (!ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, + andd->object_name, + &h))) { + pr_err("Failed to find handle for ACPI object %s\n", + andd->object_name); + continue; + } + acpi_bus_get_device(h, &adev); + if (!adev) { + pr_err("Failed to get device for ACPI object %s\n", + andd->object_name); + continue; + } + dmar_acpi_insert_dev_scope(andd->device_number, adev); + } + andd = ((void *)andd) + andd->header.length; + } + return 0; +} + int __init dmar_dev_scope_init(void) { struct pci_dev *dev = NULL; @@ -620,6 +693,8 @@ int __init dmar_dev_scope_init(void) if (dmar_dev_scope_status != 1) return dmar_dev_scope_status; + dmar_acpi_dev_scope_init(); + if (list_empty(&dmar_drhd_units)) { dmar_dev_scope_status = -ENODEV; } else { |
