summaryrefslogtreecommitdiffstats
path: root/drivers/pci/dmar.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pci/dmar.c')
-rw-r--r--drivers/pci/dmar.c117
1 files changed, 100 insertions, 17 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 416f6ac65b7..83aae474759 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -320,7 +320,7 @@ found:
for (bus = dev->bus; bus; bus = bus->parent) {
struct pci_dev *bridge = bus->self;
- if (!bridge || !bridge->is_pcie ||
+ if (!bridge || !pci_is_pcie(bridge) ||
bridge->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE)
return 0;
@@ -339,6 +339,35 @@ found:
}
#endif
+#ifdef CONFIG_ACPI_NUMA
+static int __init
+dmar_parse_one_rhsa(struct acpi_dmar_header *header)
+{
+ struct acpi_dmar_rhsa *rhsa;
+ struct dmar_drhd_unit *drhd;
+
+ rhsa = (struct acpi_dmar_rhsa *)header;
+ for_each_drhd_unit(drhd) {
+ if (drhd->reg_base_addr == rhsa->base_address) {
+ int node = acpi_map_pxm_to_node(rhsa->proximity_domain);
+
+ if (!node_online(node))
+ node = -1;
+ drhd->iommu->node = node;
+ return 0;
+ }
+ }
+ WARN(1, "Your BIOS is broken; RHSA refers to non-existent DMAR unit at %llx\n"
+ "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+ drhd->reg_base_addr,
+ dmi_get_system_info(DMI_BIOS_VENDOR),
+ dmi_get_system_info(DMI_BIOS_VERSION),
+ dmi_get_system_info(DMI_PRODUCT_VERSION));
+
+ return 0;
+}
+#endif
+
static void __init
dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
{
@@ -458,7 +487,9 @@ parse_dmar_table(void)
#endif
break;
case ACPI_DMAR_HARDWARE_AFFINITY:
- /* We don't do anything with RHSA (yet?) */
+#ifdef CONFIG_ACPI_NUMA
+ ret = dmar_parse_one_rhsa(entry_header);
+#endif
break;
default:
printk(KERN_WARNING PREFIX
@@ -582,6 +613,8 @@ int __init dmar_table_init(void)
return 0;
}
+static int bios_warned;
+
int __init check_zero_address(void)
{
struct acpi_table_dmar *dmar;
@@ -601,6 +634,9 @@ int __init check_zero_address(void)
}
if (entry_header->type == ACPI_DMAR_TYPE_HARDWARE_UNIT) {
+ void __iomem *addr;
+ u64 cap, ecap;
+
drhd = (void *)entry_header;
if (!drhd->address) {
/* Promote an attitude of violence to a BIOS engineer today */
@@ -609,17 +645,40 @@ int __init check_zero_address(void)
dmi_get_system_info(DMI_BIOS_VENDOR),
dmi_get_system_info(DMI_BIOS_VERSION),
dmi_get_system_info(DMI_PRODUCT_VERSION));
-#ifdef CONFIG_DMAR
- dmar_disabled = 1;
-#endif
- return 0;
+ bios_warned = 1;
+ goto failed;
+ }
+
+ addr = early_ioremap(drhd->address, VTD_PAGE_SIZE);
+ if (!addr ) {
+ printk("IOMMU: can't validate: %llx\n", drhd->address);
+ goto failed;
+ }
+ cap = dmar_readq(addr + DMAR_CAP_REG);
+ ecap = dmar_readq(addr + DMAR_ECAP_REG);
+ early_iounmap(addr, VTD_PAGE_SIZE);
+ if (cap == (uint64_t)-1 && ecap == (uint64_t)-1) {
+ /* Promote an attitude of violence to a BIOS engineer today */
+ WARN(1, "Your BIOS is broken; DMAR reported at address %llx returns all ones!\n"
+ "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+ drhd->address,
+ dmi_get_system_info(DMI_BIOS_VENDOR),
+ dmi_get_system_info(DMI_BIOS_VERSION),
+ dmi_get_system_info(DMI_PRODUCT_VERSION));
+ bios_warned = 1;
+ goto failed;
}
- break;
}
entry_header = ((void *)entry_header + entry_header->length);
}
return 1;
+
+failed:
+#ifdef CONFIG_DMAR
+ dmar_disabled = 1;
+#endif
+ return 0;
}
void __init detect_intel_iommu(void)
@@ -645,8 +704,11 @@ void __init detect_intel_iommu(void)
"x2apic and Intr-remapping.\n");
#endif
#ifdef CONFIG_DMAR
- if (ret && !no_iommu && !iommu_detected && !dmar_disabled)
+ if (ret && !no_iommu && !iommu_detected && !dmar_disabled) {
iommu_detected = 1;
+ /* Make sure ACS will be enabled */
+ pci_request_acs();
+ }
#endif
#ifdef CONFIG_X86
if (ret)
@@ -667,6 +729,18 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
int agaw = 0;
int msagaw = 0;
+ if (!drhd->reg_base_addr) {
+ if (!bios_warned) {
+ WARN(1, "Your BIOS is broken; DMAR reported at address zero!\n"
+ "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+ dmi_get_system_info(DMI_BIOS_VENDOR),
+ dmi_get_system_info(DMI_BIOS_VERSION),
+ dmi_get_system_info(DMI_PRODUCT_VERSION));
+ bios_warned = 1;
+ }
+ return -EINVAL;
+ }
+
iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
if (!iommu)
return -ENOMEM;
@@ -683,13 +757,16 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
iommu->ecap = dmar_readq(iommu->reg + DMAR_ECAP_REG);
if (iommu->cap == (uint64_t)-1 && iommu->ecap == (uint64_t)-1) {
- /* Promote an attitude of violence to a BIOS engineer today */
- WARN(1, "Your BIOS is broken; DMAR reported at address %llx returns all ones!\n"
- "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
- drhd->reg_base_addr,
- dmi_get_system_info(DMI_BIOS_VENDOR),
- dmi_get_system_info(DMI_BIOS_VERSION),
- dmi_get_system_info(DMI_PRODUCT_VERSION));
+ if (!bios_warned) {
+ /* Promote an attitude of violence to a BIOS engineer today */
+ WARN(1, "Your BIOS is broken; DMAR reported at address %llx returns all ones!\n"
+ "BIOS vendor: %s; Ver: %s; Product Version: %s\n",
+ drhd->reg_base_addr,
+ dmi_get_system_info(DMI_BIOS_VENDOR),
+ dmi_get_system_info(DMI_BIOS_VERSION),
+ dmi_get_system_info(DMI_PRODUCT_VERSION));
+ bios_warned = 1;
+ }
goto err_unmap;
}
@@ -712,6 +789,8 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
iommu->agaw = agaw;
iommu->msagaw = msagaw;
+ iommu->node = -1;
+
/* the registers might be more than one page */
map_size = max_t(int, ecap_max_iotlb_offset(iommu->ecap),
cap_max_fault_reg_offset(iommu->cap));
@@ -1053,6 +1132,7 @@ static void __dmar_enable_qi(struct intel_iommu *iommu)
int dmar_enable_qi(struct intel_iommu *iommu)
{
struct q_inval *qi;
+ struct page *desc_page;
if (!ecap_qis(iommu->ecap))
return -ENOENT;
@@ -1069,13 +1149,16 @@ int dmar_enable_qi(struct intel_iommu *iommu)
qi = iommu->qi;
- qi->desc = (void *)(get_zeroed_page(GFP_ATOMIC));
- if (!qi->desc) {
+
+ desc_page = alloc_pages_node(iommu->node, GFP_ATOMIC | __GFP_ZERO, 0);
+ if (!desc_page) {
kfree(qi);
iommu->qi = 0;
return -ENOMEM;
}
+ qi->desc = page_address(desc_page);
+
qi->desc_status = kmalloc(QI_LENGTH * sizeof(int), GFP_ATOMIC);
if (!qi->desc_status) {
free_page((unsigned long) qi->desc);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-19 02:46:54 +0000