Add vsw(4), a driver for the virtual network switch on sun4v. This is just

some simple glue to attach each port as a network interface.

2 files changed, 144 insertions, 2 deletions

diff --git a/sys/arch/sparc64/conf/files.sparc64 b/sys/arch/sparc64/conf/files.sparc64
index d1161da6b37..6d32e0c4bb4 100644
--- a/sys/arch/sparc64/conf/files.sparc64
+++ b/sys/arch/sparc64/conf/files.sparc64
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.sparc64,v 1.121 2009/05/10 12:24:04 kettenis Exp $
+#	$OpenBSD: files.sparc64,v 1.122 2009/05/16 10:53:06 kettenis Exp $
 #	$NetBSD: files.sparc64,v 1.50 2001/08/10 20:53:50 eeh Exp $
 
 # maxpartitions must be first item in files.${ARCH}
@@ -403,9 +403,14 @@ device	vdsk: ldc, scsi
 attach	vdsk at cbus
 file	arch/sparc64/dev/vdsk.c			vdsk
 
+# Virtual network switch
+device	vsw {}
+attach	vsw at cbus
+file	arch/sparc64/dev/vsw.c			vsw
+
 # Virtual network
 device	vnet: ldc
-attach	vnet at cbus
+attach	vnet at cbus, vsw
 file	arch/sparc64/dev/vnet.c			vnet
 
 # Virtual console concentrator
diff --git a/sys/arch/sparc64/dev/vsw.c b/sys/arch/sparc64/dev/vsw.c
new file mode 100644
index 00000000000..6202230b2c3
--- /dev/null
+++ b/sys/arch/sparc64/dev/vsw.c
@@ -0,0 +1,137 @@
+/*	$OpenBSD: vsw.c,v 1.1 2009/05/16 10:53:06 kettenis Exp $	*/
+/*
+ * Copyright (c) 2009 Mark Kettenis
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/buf.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+#include <sys/systm.h>
+
+#include <machine/autoconf.h>
+#include <machine/hypervisor.h>
+#include <machine/mdesc.h>
+
+#include <sparc64/dev/cbusvar.h>
+
+#ifdef VSW_DEBUG
+#define DPRINTF(x)	printf x
+#else
+#define DPRINTF(x)
+#endif
+
+struct vsw_softc {
+	struct device	sc_dv;
+	bus_space_tag_t	sc_bustag;
+	bus_dma_tag_t	sc_dmatag;
+};
+
+int	vsw_match(struct device *, void *, void *);
+void	vsw_attach(struct device *, struct device *, void *);
+
+struct cfattach vsw_ca = {
+	sizeof(struct vsw_softc), vsw_match, vsw_attach
+};
+
+struct cfdriver vsw_cd = {
+	NULL, "vsw", DV_DULL
+};
+
+void	vsw_get_channel_endpoint(int, struct cbus_attach_args *);
+
+int
+vsw_match(struct device *parent, void *match, void *aux)
+{
+	struct cbus_attach_args *ca = aux;
+
+	if (strcmp(ca->ca_name, "virtual-network-switch") == 0)
+		return (1);
+
+	return (0);
+}
+
+void
+vsw_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct cbus_attach_args *ca = aux;
+	struct cbus_attach_args nca;
+	struct md_header *hdr;
+	struct md_element *elem;
+	const char *name_blk;
+	const char *str;
+	int idx;
+	int arc;
+
+	printf("\n");
+
+	hdr = (struct md_header *)mdesc;
+	elem = (struct md_element *)(mdesc + sizeof(struct md_header));
+	name_blk = mdesc + sizeof(struct md_header) + hdr->node_blk_sz;
+
+	idx = ca->ca_idx;
+	for (; elem[idx].tag != 'E'; idx++) {
+		str = name_blk + elem[idx].name_offset;
+		if (elem[idx].tag != 'a' || strcmp(str, "fwd") != 0)
+			continue;
+
+		arc = elem[idx].d.val;
+		str = name_blk + elem[arc].name_offset;
+		if (strcmp(str, "virtual-device-port") == 0) {
+			bzero(&nca, sizeof(nca));
+			nca.ca_name = "network";
+			nca.ca_node = ca->ca_node;
+			nca.ca_bustag = ca->ca_bustag;
+			nca.ca_dmatag = ca->ca_dmatag;
+			vsw_get_channel_endpoint(arc, &nca);
+			config_found(self, &nca, cbus_print);
+		}
+	}
+}
+
+void
+vsw_get_channel_endpoint(int idx, struct cbus_attach_args *ca)
+{
+	struct md_header *hdr;
+	struct md_element *elem;
+	const char *name_blk;
+	const char *str;
+	int arc;
+
+	hdr = (struct md_header *)mdesc;
+	elem = (struct md_element *)(mdesc + sizeof(struct md_header));
+	name_blk = mdesc + sizeof(struct md_header) + hdr->node_blk_sz;
+
+	ca->ca_idx = idx;
+
+	ca->ca_id = -1;
+	ca->ca_tx_ino = -1;
+	ca->ca_rx_ino = -1;
+
+	for (; elem[idx].tag != 'E'; idx++) {
+		str = name_blk + elem[idx].name_offset;
+		if (elem[idx].tag != 'a' || strcmp(str, "fwd") != 0)
+			continue;
+
+		arc = elem[idx].d.val;
+		str = name_blk + elem[arc].name_offset;
+		if (strcmp(str, "channel-endpoint") == 0) {
+			ca->ca_id = mdesc_get_prop_val(arc, "id");
+			ca->ca_tx_ino = mdesc_get_prop_val(arc, "tx-ino");
+			ca->ca_rx_ino = mdesc_get_prop_val(arc, "rx-ino");
+			return;
+		}
+	}
+}