PCI/ACPI: negotiate CXL _OSC

[sfrench/cifs-2.6.git] / include / linux / acpi.h

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 82d91d9ccce5874122d7708408b80db78c271d15..378a431666b3d5f8b2f255bb2926d7ce1731fec8 100644 (file)
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -554,10 +554,12 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
 #define OSC_PCI_CAPABILITY_DWORDS              3
 #define OSC_CXL_CAPABILITY_DWORDS              5
 
-/* Indexes into _OSC Capabilities Buffer (DWORDs 2 & 3 are device-specific) */
+/* Indexes into _OSC Capabilities Buffer (DWORDs 2 to 5 are device-specific) */
 #define OSC_QUERY_DWORD                                0       /* DWORD 1 */
 #define OSC_SUPPORT_DWORD                      1       /* DWORD 2 */
 #define OSC_CONTROL_DWORD                      2       /* DWORD 3 */
+#define OSC_EXT_SUPPORT_DWORD                  3       /* DWORD 4 */
+#define OSC_EXT_CONTROL_DWORD                  4       /* DWORD 5 */
 
 /* _OSC Capabilities DWORD 1: Query/Control and Error Returns (generic) */
 #define OSC_QUERY_ENABLE                       0x00000001  /* input */
@@ -612,6 +614,15 @@ extern u32 osc_sb_native_usb4_control;
 #define OSC_PCI_EXPRESS_LTR_CONTROL            0x00000020
 #define OSC_PCI_EXPRESS_DPC_CONTROL            0x00000080
 
+/* CXL _OSC: Capabilities DWORD 4: Support Field */
+#define OSC_CXL_1_1_PORT_REG_ACCESS_SUPPORT    0x00000001
+#define OSC_CXL_2_0_PORT_DEV_REG_ACCESS_SUPPORT        0x00000002
+#define OSC_CXL_PROTOCOL_ERR_REPORTING_SUPPORT 0x00000004
+#define OSC_CXL_NATIVE_HP_SUPPORT              0x00000008
+
+/* CXL _OSC: Capabilities DWORD 5: Control Field */
+#define OSC_CXL_ERROR_REPORTING_CONTROL                0x00000001
+
 static inline u32 acpi_osc_ctx_get_pci_control(struct acpi_osc_context *context)
 {
        u32 *ret = context->ret.pointer;
@@ -619,6 +630,13 @@ static inline u32 acpi_osc_ctx_get_pci_control(struct acpi_osc_context *context)
        return ret[OSC_CONTROL_DWORD];
 }
 
+static inline u32 acpi_osc_ctx_get_cxl_control(struct acpi_osc_context *context)
+{
+       u32 *ret = context->ret.pointer;
+
+       return ret[OSC_EXT_CONTROL_DWORD];
+}
+
 #define ACPI_GSB_ACCESS_ATTRIB_QUICK           0x00000002
 #define ACPI_GSB_ACCESS_ATTRIB_SEND_RCV         0x00000004
 #define ACPI_GSB_ACCESS_ATTRIB_BYTE            0x00000006
@@ -1021,6 +1039,11 @@ static inline u32 acpi_osc_ctx_get_pci_control(struct acpi_osc_context *context)
        return 0;
 }
 
+static inline u32 acpi_osc_ctx_get_cxl_control(struct acpi_osc_context *context)
+{
+       return 0;
+}
+
 #endif /* !CONFIG_ACPI */
 
 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC