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/*-
* Copyright (c) 2014,2016 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 (resource_disabled("hvheartbeat", 0))
return ENXIO;
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);
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