@@ -107,6 +107,41 @@ static struct memory_target *find_mem_target(unsigned int mem_pxm)
return NULL;
}
+static struct memory_target *acpi_find_genport_target(u8 *device_handle)
+{
+ struct memory_target *target;
+
+ list_for_each_entry(target, &targets, node) {
+ if (!memcmp(target->gen_port_device_handle, device_handle,
+ ACPI_SRAT_DEVICE_HANDLE_SIZE))
+ return target;
+ }
+
+ return NULL;
+}
+
+/**
+ * acpi_get_genport_coordinates - Retrieve the access coordinates for a generic port
+ * @device_handle: Device handle string (ACPI or PCI) to match up to the gen port
+ * @coord: The access coordinates written back out for the generic port
+ *
+ * Return: 0 on success. Errno on failure.
+ */
+int acpi_get_genport_coordinates(u8 *device_handle,
+ struct access_coordinate *coord)
+{
+ struct memory_target *target;
+
+ target = acpi_find_genport_target(device_handle);
+ if (!target)
+ return -ENOENT;
+
+ *coord = target->coord[NODE_ACCESS_CLASS_GENPORT_SINK];
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(acpi_get_genport_coordinates, CXL);
+
static __init void alloc_memory_initiator(unsigned int cpu_pxm)
{
struct memory_initiator *initiator;
@@ -16,6 +16,7 @@
#include <linux/property.h>
#include <linux/uuid.h>
#include <linux/fw_table.h>
+#include <linux/node.h>
struct irq_domain;
struct irq_domain_ops;
@@ -419,6 +420,17 @@ extern int acpi_blacklisted(void);
extern void acpi_osi_setup(char *str);
extern bool acpi_osi_is_win8(void);
+#ifdef CONFIG_ACPI_HMAT
+int acpi_get_genport_coordinates(u8 *device_handle,
+ struct access_coordinate *coord);
+#else
+static inline int acpi_get_genport_coordinates(u8 *device_handle,
+ struct access_coordinate *coord)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
#ifdef CONFIG_ACPI_NUMA
int acpi_map_pxm_to_node(int pxm);
int acpi_get_node(acpi_handle handle);