1 files changed, 129 insertions, 0 deletions
diff --git a/sys/dev/hyperv/utilities/hv_heartbeat.c b/sys/dev/hyperv/utilities/hv_heartbeat.c
new file mode 100644
index 0000000..c1b6da5
--- /dev/null
+++ b/sys/dev/hyperv/utilities/hv_heartbeat.c
@@ -0,0 +1,129 @@
+/*-
+ * Copyright (c) 2014 Microsoft Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/timetc.h>
+#include <sys/syscallsubr.h>
+
+#include <dev/hyperv/include/hyperv.h>
+#include "hv_util.h"
+
+/* Heartbeat Service */
+static hv_guid service_guid = { .data =
+	{0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
+	0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d} };
+
+/**
+ * Process heartbeat message
+ */
+static void
+hv_heartbeat_cb(void *context)
+{
+	uint8_t*		buf;
+	hv_vmbus_channel*	channel;
+	uint32_t		recvlen;
+	uint64_t		requestid;
+	int			ret;
+
+	struct hv_vmbus_heartbeat_msg_data*	heartbeat_msg;
+	struct hv_vmbus_icmsg_hdr*		icmsghdrp;
+	hv_util_sc			*softc;
+
+	softc = (hv_util_sc*)context;
+	buf = softc->receive_buffer;;
+	channel = softc->hv_dev->channel;
+
+	ret = hv_vmbus_channel_recv_packet(channel, buf, PAGE_SIZE, &recvlen,
+					    &requestid);
+
+	if ((ret == 0) && recvlen > 0) {
+
+	    icmsghdrp = (struct hv_vmbus_icmsg_hdr *)
+		&buf[sizeof(struct hv_vmbus_pipe_hdr)];
+
+	    if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) {
+		hv_negotiate_version(icmsghdrp, NULL, buf);
+
+	    } else {
+		heartbeat_msg =
+		    (struct hv_vmbus_heartbeat_msg_data *)
+			&buf[sizeof(struct hv_vmbus_pipe_hdr) +
+			     sizeof(struct hv_vmbus_icmsg_hdr)];
+
+		heartbeat_msg->seq_num += 1;
+	    }
+
+	    icmsghdrp->icflags = HV_ICMSGHDRFLAG_TRANSACTION |
+				 HV_ICMSGHDRFLAG_RESPONSE;
+
+	    hv_vmbus_channel_send_packet(channel, buf, recvlen, requestid,
+		HV_VMBUS_PACKET_TYPE_DATA_IN_BAND, 0);
+	}
+}
+
+static int
+hv_heartbeat_probe(device_t dev)
+{
+	const char *p = vmbus_get_type(dev);
+	if (!memcmp(p, &service_guid, sizeof(hv_guid))) {
+		device_set_desc(dev, "Hyper-V Heartbeat Service");
+		return BUS_PROBE_DEFAULT;
+	}
+
+	return ENXIO;
+}
+
+static int
+hv_heartbeat_attach(device_t dev)
+{
+	hv_util_sc *softc = (hv_util_sc*)device_get_softc(dev);
+
+	softc->callback = hv_heartbeat_cb;
+
+	return hv_util_attach(dev);
+}
+
+static device_method_t heartbeat_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe, hv_heartbeat_probe),
+	DEVMETHOD(device_attach, hv_heartbeat_attach),
+	DEVMETHOD(device_detach, hv_util_detach),
+	{ 0, 0 }
+};
+
+static driver_t heartbeat_driver = { "hvheartbeat", heartbeat_methods, sizeof(hv_util_sc)};
+
+static devclass_t heartbeat_devclass;
+
+DRIVER_MODULE(hv_heartbeat, vmbus, heartbeat_driver, heartbeat_devclass, NULL, NULL);
+MODULE_VERSION(hv_heartbeat, 1);
+MODULE_DEPEND(hv_heartbeat, vmbus, 1, 1, 1);