vldc(4) is a "bus" driver for Logical Domain Channels.

1 files changed, 141 insertions, 0 deletions

diff --git a/sys/arch/sparc64/dev/vldc.c b/sys/arch/sparc64/dev/vldc.c
new file mode 100644
index 00000000000..ee187eda3bb
--- /dev/null
+++ b/sys/arch/sparc64/dev/vldc.c
@@ -0,0 +1,141 @@
+/*	$OpenBSD: vldc.c,v 1.1 2012/03/17 20:07:18 kettenis Exp $	*/
+/*
+ * Copyright (c) 2009, 2012 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 VLDC_DEBUG
+#define DPRINTF(x)	printf x
+#else
+#define DPRINTF(x)
+#endif
+
+struct vldc_softc {
+	struct device	sc_dv;
+	bus_space_tag_t	sc_bustag;
+	bus_dma_tag_t	sc_dmatag;
+};
+
+int	vldc_match(struct device *, void *, void *);
+void	vldc_attach(struct device *, struct device *, void *);
+
+struct cfattach vldc_ca = {
+	sizeof(struct vldc_softc), vldc_match, vldc_attach
+};
+
+struct cfdriver vldc_cd = {
+	NULL, "vldc", DV_DULL
+};
+
+void	vldc_get_channel_endpoint(int, struct cbus_attach_args *);
+
+int
+vldc_match(struct device *parent, void *match, void *aux)
+{
+	struct cbus_attach_args *ca = aux;
+
+	if (strcmp(ca->ca_name, "virtual-channel") == 0 ||
+	    strcmp(ca->ca_name, "virtual-channel-client") == 0)
+		return (1);
+
+	return (0);
+}
+
+void
+vldc_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) {
+			str = mdesc_get_prop_str(arc, "vldc-svc-name");
+			if (str) {
+				bzero(&nca, sizeof(nca));
+				nca.ca_name = str;
+				nca.ca_node = ca->ca_node;
+				nca.ca_bustag = ca->ca_bustag;
+				nca.ca_dmatag = ca->ca_dmatag;
+				vldc_get_channel_endpoint(arc, &nca);
+				config_found(self, &nca, cbus_print);
+			}
+		}
+	}
+}
+
+void
+vldc_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;
+		}
+	}
+}