9b6306f287
MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7423
134 lines
4.0 KiB
C
134 lines
4.0 KiB
C
/*-
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* Copyright (c) 2014,2016 Microsoft Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/timetc.h>
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#include <sys/syscallsubr.h>
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#include <sys/systm.h>
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#include <dev/hyperv/include/hyperv.h>
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#include <dev/hyperv/include/vmbus.h>
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#include <dev/hyperv/utilities/hv_utilreg.h>
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#include "hv_util.h"
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#include "vmbus_if.h"
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/* Heartbeat Service */
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static const struct hyperv_guid service_guid = { .hv_guid =
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{0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
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0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d} };
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/**
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* Process heartbeat message
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*/
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static void
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hv_heartbeat_cb(struct vmbus_channel *channel, void *context)
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{
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uint8_t* buf;
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int recvlen;
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uint64_t requestid;
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int ret;
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struct hv_vmbus_heartbeat_msg_data* heartbeat_msg;
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struct hv_vmbus_icmsg_hdr* icmsghdrp;
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hv_util_sc *softc;
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softc = (hv_util_sc*)context;
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buf = softc->receive_buffer;
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recvlen = softc->ic_buflen;
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ret = vmbus_chan_recv(channel, buf, &recvlen, &requestid);
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KASSERT(ret != ENOBUFS, ("hvheartbeat recvbuf is not large enough"));
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/* XXX check recvlen to make sure that it contains enough data */
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if ((ret == 0) && recvlen > 0) {
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icmsghdrp = (struct hv_vmbus_icmsg_hdr *)
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&buf[sizeof(struct hv_vmbus_pipe_hdr)];
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if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) {
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hv_negotiate_version(icmsghdrp, buf);
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} else {
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heartbeat_msg =
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(struct hv_vmbus_heartbeat_msg_data *)
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&buf[sizeof(struct hv_vmbus_pipe_hdr) +
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sizeof(struct hv_vmbus_icmsg_hdr)];
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heartbeat_msg->seq_num += 1;
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}
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icmsghdrp->icflags = HV_ICMSGHDRFLAG_TRANSACTION |
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HV_ICMSGHDRFLAG_RESPONSE;
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vmbus_chan_send(channel, VMBUS_CHANPKT_TYPE_INBAND, 0,
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buf, recvlen, requestid);
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}
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}
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static int
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hv_heartbeat_probe(device_t dev)
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{
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if (resource_disabled("hvheartbeat", 0))
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return ENXIO;
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if (VMBUS_PROBE_GUID(device_get_parent(dev), dev, &service_guid) == 0) {
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device_set_desc(dev, "Hyper-V Heartbeat Service");
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return BUS_PROBE_DEFAULT;
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}
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return ENXIO;
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}
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static int
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hv_heartbeat_attach(device_t dev)
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{
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hv_util_sc *softc = (hv_util_sc*)device_get_softc(dev);
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softc->callback = hv_heartbeat_cb;
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return hv_util_attach(dev);
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}
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static device_method_t heartbeat_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, hv_heartbeat_probe),
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DEVMETHOD(device_attach, hv_heartbeat_attach),
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DEVMETHOD(device_detach, hv_util_detach),
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{ 0, 0 }
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};
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static driver_t heartbeat_driver = { "hvheartbeat", heartbeat_methods, sizeof(hv_util_sc)};
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static devclass_t heartbeat_devclass;
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DRIVER_MODULE(hv_heartbeat, vmbus, heartbeat_driver, heartbeat_devclass, NULL, NULL);
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MODULE_VERSION(hv_heartbeat, 1);
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MODULE_DEPEND(hv_heartbeat, vmbus, 1, 1, 1);
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