Support DMA coherent devices that attach to mainbus(4) as well.

ok patrick@

diff --git a/sys/arch/arm64/dev/mainbus.c b/sys/arch/arm64/dev/mainbus.c
index 4205acf..049ecc3 100644 (file)
--- a/sys/arch/arm64/dev/mainbus.c
+++ b/sys/arch/arm64/dev/mainbus.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: mainbus.c,v 1.9 2018/02/24 09:45:10 kettenis Exp $ */
+/* $OpenBSD: mainbus.c,v 1.10 2018/08/08 20:57:53 kettenis Exp $ */
 /*
  * Copyright (c) 2016 Patrick Wildt <patrick@blueri.se>
  * Copyright (c) 2017 Mark Kettenis <kettenis@openbsd.org>
@@ -202,6 +202,13 @@ mainbus_attach_node(struct device *self, int node, cfmatch_t submatch)
                OF_getpropintarray(node, "interrupts", fa.fa_intr, len);
        }
 
+       if (OF_getproplen(node, "dma-coherent") >= 0) {
+               fa.fa_dmat = malloc(sizeof(*sc->sc_dmat),
+                   M_DEVBUF, M_WAITOK | M_ZERO);
+               memcpy(fa.fa_dmat, sc->sc_dmat, sizeof(*sc->sc_dmat));
+               fa.fa_dmat->_flags |= BUS_DMA_COHERENT;
+       }
+
        if (submatch == NULL)
                submatch = mainbus_match_status;
        config_found_sm(self, &fa, NULL, submatch);