02d9926559
MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7626
142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/*-
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <dev/hyperv/include/hyperv.h>
|
|
#include <dev/hyperv/include/vmbus.h>
|
|
#include <dev/hyperv/utilities/hv_util.h>
|
|
#include <dev/hyperv/utilities/vmbus_icreg.h>
|
|
|
|
#include "vmbus_if.h"
|
|
|
|
static const struct vmbus_ic_desc vmbus_heartbeat_descs[] = {
|
|
{
|
|
.ic_guid = { .hv_guid = {
|
|
0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
|
|
0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d} },
|
|
.ic_desc = "Hyper-V Heartbeat"
|
|
},
|
|
VMBUS_IC_DESC_END
|
|
};
|
|
|
|
static void
|
|
vmbus_heartbeat_cb(struct vmbus_channel *chan, void *xsc)
|
|
{
|
|
struct hv_util_sc *sc = xsc;
|
|
struct vmbus_icmsg_hdr *hdr;
|
|
int dlen, error;
|
|
uint64_t xactid;
|
|
void *data;
|
|
|
|
/*
|
|
* Receive request.
|
|
*/
|
|
data = sc->receive_buffer;
|
|
dlen = sc->ic_buflen;
|
|
error = vmbus_chan_recv(chan, data, &dlen, &xactid);
|
|
KASSERT(error != ENOBUFS, ("icbuf is not large enough"));
|
|
if (error)
|
|
return;
|
|
|
|
if (dlen < sizeof(struct vmbus_icmsg_hdr)) {
|
|
device_printf(sc->ic_dev, "invalid data len %d\n", dlen);
|
|
return;
|
|
}
|
|
hdr = data;
|
|
|
|
/*
|
|
* Update request, which will be echoed back as response.
|
|
*/
|
|
switch (hdr->ic_type) {
|
|
case VMBUS_ICMSG_TYPE_NEGOTIATE:
|
|
error = vmbus_ic_negomsg(sc, data, dlen);
|
|
if (error)
|
|
return;
|
|
break;
|
|
|
|
case VMBUS_ICMSG_TYPE_HEARTBEAT:
|
|
/* Only ic_seq is a must */
|
|
if (dlen < VMBUS_ICMSG_HEARTBEAT_SIZE_MIN) {
|
|
device_printf(sc->ic_dev, "invalid heartbeat len %d\n",
|
|
dlen);
|
|
return;
|
|
}
|
|
((struct vmbus_icmsg_heartbeat *)data)->ic_seq++;
|
|
break;
|
|
|
|
default:
|
|
device_printf(sc->ic_dev, "got 0x%08x icmsg\n", hdr->ic_type);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Send response by echoing the updated request back.
|
|
*/
|
|
hdr->ic_flags = VMBUS_ICMSG_FLAG_XACT | VMBUS_ICMSG_FLAG_RESP;
|
|
error = vmbus_chan_send(chan, VMBUS_CHANPKT_TYPE_INBAND, 0,
|
|
data, dlen, xactid);
|
|
if (error)
|
|
device_printf(sc->ic_dev, "resp send failed: %d\n", error);
|
|
}
|
|
|
|
static int
|
|
hv_heartbeat_probe(device_t dev)
|
|
{
|
|
|
|
return (vmbus_ic_probe(dev, vmbus_heartbeat_descs));
|
|
}
|
|
|
|
static int
|
|
hv_heartbeat_attach(device_t dev)
|
|
{
|
|
|
|
return (hv_util_attach(dev, vmbus_heartbeat_cb));
|
|
}
|
|
|
|
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);
|