if (iort_node->type == type &&
ACPI_SUCCESS(callback(iort_node, context)))
- return iort_node;
+ return iort_node;
iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort_node,
iort_node->length);
void *context)
{
struct device *dev = context;
- acpi_status status;
+ acpi_status status = AE_NOT_FOUND;
if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT) {
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_device *adev = to_acpi_device_node(dev->fwnode);
struct acpi_iort_named_component *ncomp;
- if (!adev) {
- status = AE_NOT_FOUND;
+ if (!adev)
goto out;
- }
status = acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &buf);
if (ACPI_FAILURE(status)) {
*/
status = pci_rc->pci_segment_number == pci_domain_nr(bus) ?
AE_OK : AE_NOT_FOUND;
- } else {
- status = AE_NOT_FOUND;
}
out:
return status;
static
struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node,
- u32 *id_out, u8 type_mask,
- int index)
+ u32 *id_out, int index)
{
struct acpi_iort_node *parent;
struct acpi_iort_id_mapping *map;
parent = ACPI_ADD_PTR(struct acpi_iort_node, iort_table,
map->output_reference);
- if (!(IORT_TYPE_MASK(parent->type) & type_mask))
- return NULL;
-
if (map->flags & ACPI_IORT_ID_SINGLE_MAPPING) {
if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT ||
node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
return NULL;
}
-static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node,
- u32 rid_in, u32 *rid_out,
- u8 type_mask)
+static struct acpi_iort_node *iort_node_map_id(struct acpi_iort_node *node,
+ u32 id_in, u32 *id_out,
+ u8 type_mask)
{
- u32 rid = rid_in;
+ u32 id = id_in;
/* Parse the ID mapping tree to find specified node type */
while (node) {
int i;
if (IORT_TYPE_MASK(node->type) & type_mask) {
- if (rid_out)
- *rid_out = rid;
+ if (id_out)
+ *id_out = id;
return node;
}
goto fail_map;
}
- /* Do the RID translation */
+ /* Do the ID translation */
for (i = 0; i < node->mapping_count; i++, map++) {
- if (!iort_id_map(map, node->type, rid, &rid))
+ if (!iort_id_map(map, node->type, id, &id))
break;
}
}
fail_map:
- /* Map input RID to output RID unchanged on mapping failure*/
- if (rid_out)
- *rid_out = rid_in;
+ /* Map input ID to output ID unchanged on mapping failure */
+ if (id_out)
+ *id_out = id_in;
return NULL;
}
+static
+struct acpi_iort_node *iort_node_map_platform_id(struct acpi_iort_node *node,
+ u32 *id_out, u8 type_mask,
+ int index)
+{
+ struct acpi_iort_node *parent;
+ u32 id;
+
+ /* step 1: retrieve the initial dev id */
+ parent = iort_node_get_id(node, &id, index);
+ if (!parent)
+ return NULL;
+
+ /*
+ * optional step 2: map the initial dev id if its parent is not
+ * the target type we want, map it again for the use cases such
+ * as NC (named component) -> SMMU -> ITS. If the type is matched,
+ * return the initial dev id and its parent pointer directly.
+ */
+ if (!(IORT_TYPE_MASK(parent->type) & type_mask))
+ parent = iort_node_map_id(parent, id, id_out, type_mask);
+ else
+ if (id_out)
+ *id_out = id;
+
+ return parent;
+}
+
static struct acpi_iort_node *iort_find_dev_node(struct device *dev)
{
struct pci_bus *pbus;
if (!node)
return req_id;
- iort_node_map_rid(node, req_id, &dev_id, IORT_MSI_TYPE);
+ iort_node_map_id(node, req_id, &dev_id, IORT_MSI_TYPE);
return dev_id;
}
+/**
+ * iort_pmsi_get_dev_id() - Get the device id for a device
+ * @dev: The device for which the mapping is to be done.
+ * @dev_id: The device ID found.
+ *
+ * Returns: 0 for successful find a dev id, -ENODEV on error
+ */
+int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id)
+{
+ int i;
+ struct acpi_iort_node *node;
+
+ node = iort_find_dev_node(dev);
+ if (!node)
+ return -ENODEV;
+
+ for (i = 0; i < node->mapping_count; i++) {
+ if (iort_node_map_platform_id(node, dev_id, IORT_MSI_TYPE, i))
+ return 0;
+ }
+
+ return -ENODEV;
+}
+
/**
* iort_dev_find_its_id() - Find the ITS identifier for a device
* @dev: The device.
+ * @req_id: Device's requester ID
* @idx: Index of the ITS identifier list.
* @its_id: ITS identifier.
*
if (!node)
return -ENXIO;
- node = iort_node_map_rid(node, req_id, NULL, IORT_MSI_TYPE);
+ node = iort_node_map_id(node, req_id, NULL, IORT_MSI_TYPE);
if (!node)
return -ENXIO;
return irq_find_matching_fwnode(handle, DOMAIN_BUS_PCI_MSI);
}
+/**
+ * iort_get_platform_device_domain() - Find MSI domain related to a
+ * platform device
+ * @dev: the dev pointer associated with the platform device
+ *
+ * Returns: the MSI domain for this device, NULL otherwise
+ */
+static struct irq_domain *iort_get_platform_device_domain(struct device *dev)
+{
+ struct acpi_iort_node *node, *msi_parent;
+ struct fwnode_handle *iort_fwnode;
+ struct acpi_iort_its_group *its;
+ int i;
+
+ /* find its associated iort node */
+ node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
+ iort_match_node_callback, dev);
+ if (!node)
+ return NULL;
+
+ /* then find its msi parent node */
+ for (i = 0; i < node->mapping_count; i++) {
+ msi_parent = iort_node_map_platform_id(node, NULL,
+ IORT_MSI_TYPE, i);
+ if (msi_parent)
+ break;
+ }
+
+ if (!msi_parent)
+ return NULL;
+
+ /* Move to ITS specific data */
+ its = (struct acpi_iort_its_group *)msi_parent->node_data;
+
+ iort_fwnode = iort_find_domain_token(its->identifiers[0]);
+ if (!iort_fwnode)
+ return NULL;
+
+ return irq_find_matching_fwnode(iort_fwnode, DOMAIN_BUS_PLATFORM_MSI);
+}
+
+void acpi_configure_pmsi_domain(struct device *dev)
+{
+ struct irq_domain *msi_domain;
+
+ msi_domain = iort_get_platform_device_domain(dev);
+ if (msi_domain)
+ dev_set_msi_domain(dev, msi_domain);
+}
+
static int __get_pci_rid(struct pci_dev *pdev, u16 alias, void *data)
{
u32 *rid = data;
if (!node)
return NULL;
- parent = iort_node_map_rid(node, rid, &streamid,
- IORT_IOMMU_TYPE);
+ parent = iort_node_map_id(node, rid, &streamid,
+ IORT_IOMMU_TYPE);
ops = iort_iommu_xlate(dev, parent, streamid);
if (!node)
return NULL;
- parent = iort_node_get_id(node, &streamid,
- IORT_IOMMU_TYPE, i++);
+ parent = iort_node_map_platform_id(node, &streamid,
+ IORT_IOMMU_TYPE, i++);
while (parent) {
ops = iort_iommu_xlate(dev, parent, streamid);
if (IS_ERR_OR_NULL(ops))
return ops;
- parent = iort_node_get_id(node, &streamid,
- IORT_IOMMU_TYPE, i++);
+ parent = iort_node_map_platform_id(node, &streamid,
+ IORT_IOMMU_TYPE,
+ i++);
}
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff