From d685096f7bb8a65f93d29d3b292bbf157ab2326a Mon Sep 17 00:00:00 2001
From: kettenis <kettenis@openbsd.org>
Date: Mon, 1 May 2023 08:25:55 +0000
Subject: [PATCH] The built-in 10G Ethernet on Apple arm64 hardware does not
 have a MAC address programmed into the hardware.  Get it from the device tree
 instead.

ok dlg@, jmatthew@
---
 sys/dev/pci/if_aq_pci.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/sys/dev/pci/if_aq_pci.c b/sys/dev/pci/if_aq_pci.c
index b79099c4fc0..206e4b3a4e0 100644
--- a/sys/dev/pci/if_aq_pci.c
+++ b/sys/dev/pci/if_aq_pci.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: if_aq_pci.c,v 1.20 2023/04/24 09:18:55 jmatthew Exp $ */
+/* $OpenBSD: if_aq_pci.c,v 1.21 2023/05/01 08:25:55 kettenis Exp $ */
 /*	$NetBSD: if_aq.c,v 1.27 2021/06/16 00:21:18 riastradh Exp $	*/
 
 /*
@@ -96,6 +96,10 @@
 #include <netinet/in.h>
 #include <netinet/if_ether.h>
 
+#ifdef __HAVE_FDT
+#include <dev/ofw/openfirm.h>
+#endif
+
 #include <dev/pci/pcireg.h>
 #include <dev/pci/pcivar.h>
 #include <dev/pci/pcidevs.h>
@@ -2260,6 +2264,14 @@ aq2_get_mac_addr(struct aq_softc *sc)
 	AQ_READ_REGS(sc, AQ2_FW_INTERFACE_IN_MAC_ADDRESS_REG,
 	    mac_addr, nitems(mac_addr));
 
+#ifdef __HAVE_FDT
+	if (mac_addr[0] == 0 && mac_addr[1] == 0 &&
+	    PCITAG_NODE(sc->sc_pcitag)) {
+		OF_getprop(PCITAG_NODE(sc->sc_pcitag), "local-mac-address",
+		    mac_addr, ETHER_ADDR_LEN);
+	}
+#endif
+
 	if (mac_addr[0] == 0 && mac_addr[1] == 0) {
 		printf(": mac address not found\n");
 		return ENXIO;
-- 
2.20.1