15c072c8eSSepherosa Ziehau /*-
25c072c8eSSepherosa Ziehau * Copyright (c) 2014,2016 Microsoft Corp.
35c072c8eSSepherosa Ziehau * All rights reserved.
45c072c8eSSepherosa Ziehau *
55c072c8eSSepherosa Ziehau * Redistribution and use in source and binary forms, with or without
65c072c8eSSepherosa Ziehau * modification, are permitted provided that the following conditions
75c072c8eSSepherosa Ziehau * are met:
85c072c8eSSepherosa Ziehau * 1. Redistributions of source code must retain the above copyright
95c072c8eSSepherosa Ziehau * notice unmodified, this list of conditions, and the following
105c072c8eSSepherosa Ziehau * disclaimer.
115c072c8eSSepherosa Ziehau * 2. Redistributions in binary form must reproduce the above copyright
125c072c8eSSepherosa Ziehau * notice, this list of conditions and the following disclaimer in the
135c072c8eSSepherosa Ziehau * documentation and/or other materials provided with the distribution.
145c072c8eSSepherosa Ziehau *
155c072c8eSSepherosa Ziehau * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
165c072c8eSSepherosa Ziehau * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
175c072c8eSSepherosa Ziehau * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
185c072c8eSSepherosa Ziehau * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
195c072c8eSSepherosa Ziehau * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
205c072c8eSSepherosa Ziehau * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
215c072c8eSSepherosa Ziehau * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
225c072c8eSSepherosa Ziehau * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
235c072c8eSSepherosa Ziehau * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
245c072c8eSSepherosa Ziehau * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
255c072c8eSSepherosa Ziehau */
265c072c8eSSepherosa Ziehau
275c072c8eSSepherosa Ziehau #include <sys/param.h>
285c072c8eSSepherosa Ziehau #include <sys/bus.h>
295c072c8eSSepherosa Ziehau #include <sys/kernel.h>
305c072c8eSSepherosa Ziehau #include <sys/module.h>
315c072c8eSSepherosa Ziehau #include <sys/systm.h>
325c072c8eSSepherosa Ziehau
335c072c8eSSepherosa Ziehau #include <dev/hyperv/include/hyperv.h>
345c072c8eSSepherosa Ziehau #include <dev/hyperv/include/vmbus.h>
355c072c8eSSepherosa Ziehau #include <dev/hyperv/utilities/vmbus_icreg.h>
365c072c8eSSepherosa Ziehau #include <dev/hyperv/utilities/vmbus_icvar.h>
375c072c8eSSepherosa Ziehau
385c072c8eSSepherosa Ziehau #define VMBUS_HEARTBEAT_FWVER_MAJOR 3
395c072c8eSSepherosa Ziehau #define VMBUS_HEARTBEAT_FWVER \
405c072c8eSSepherosa Ziehau VMBUS_IC_VERSION(VMBUS_HEARTBEAT_FWVER_MAJOR, 0)
415c072c8eSSepherosa Ziehau
425c072c8eSSepherosa Ziehau #define VMBUS_HEARTBEAT_MSGVER_MAJOR 3
435c072c8eSSepherosa Ziehau #define VMBUS_HEARTBEAT_MSGVER \
445c072c8eSSepherosa Ziehau VMBUS_IC_VERSION(VMBUS_HEARTBEAT_MSGVER_MAJOR, 0)
455c072c8eSSepherosa Ziehau
465c072c8eSSepherosa Ziehau static int vmbus_heartbeat_probe(device_t);
475c072c8eSSepherosa Ziehau static int vmbus_heartbeat_attach(device_t);
485c072c8eSSepherosa Ziehau
495c072c8eSSepherosa Ziehau static const struct vmbus_ic_desc vmbus_heartbeat_descs[] = {
505c072c8eSSepherosa Ziehau {
515c072c8eSSepherosa Ziehau .ic_guid = { .hv_guid = {
525c072c8eSSepherosa Ziehau 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
535c072c8eSSepherosa Ziehau 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d} },
545c072c8eSSepherosa Ziehau .ic_desc = "Hyper-V Heartbeat"
555c072c8eSSepherosa Ziehau },
565c072c8eSSepherosa Ziehau VMBUS_IC_DESC_END
575c072c8eSSepherosa Ziehau };
585c072c8eSSepherosa Ziehau
595c072c8eSSepherosa Ziehau static device_method_t vmbus_heartbeat_methods[] = {
605c072c8eSSepherosa Ziehau /* Device interface */
615c072c8eSSepherosa Ziehau DEVMETHOD(device_probe, vmbus_heartbeat_probe),
625c072c8eSSepherosa Ziehau DEVMETHOD(device_attach, vmbus_heartbeat_attach),
635c072c8eSSepherosa Ziehau DEVMETHOD(device_detach, vmbus_ic_detach),
645c072c8eSSepherosa Ziehau DEVMETHOD_END
655c072c8eSSepherosa Ziehau };
665c072c8eSSepherosa Ziehau
675c072c8eSSepherosa Ziehau static driver_t vmbus_heartbeat_driver = {
685c072c8eSSepherosa Ziehau "hvheartbeat",
695c072c8eSSepherosa Ziehau vmbus_heartbeat_methods,
705c072c8eSSepherosa Ziehau sizeof(struct vmbus_ic_softc)
715c072c8eSSepherosa Ziehau };
725c072c8eSSepherosa Ziehau
73c1cef544SJohn Baldwin DRIVER_MODULE(hv_heartbeat, vmbus, vmbus_heartbeat_driver, NULL, NULL);
745c072c8eSSepherosa Ziehau MODULE_VERSION(hv_heartbeat, 1);
755c072c8eSSepherosa Ziehau MODULE_DEPEND(hv_heartbeat, vmbus, 1, 1, 1);
765c072c8eSSepherosa Ziehau
775c072c8eSSepherosa Ziehau static void
vmbus_heartbeat_cb(struct vmbus_channel * chan,void * xsc)785c072c8eSSepherosa Ziehau vmbus_heartbeat_cb(struct vmbus_channel *chan, void *xsc)
795c072c8eSSepherosa Ziehau {
805c072c8eSSepherosa Ziehau struct vmbus_ic_softc *sc = xsc;
815c072c8eSSepherosa Ziehau struct vmbus_icmsg_hdr *hdr;
825c072c8eSSepherosa Ziehau int dlen, error;
835c072c8eSSepherosa Ziehau uint64_t xactid;
845c072c8eSSepherosa Ziehau void *data;
855c072c8eSSepherosa Ziehau
865c072c8eSSepherosa Ziehau /*
875c072c8eSSepherosa Ziehau * Receive request.
885c072c8eSSepherosa Ziehau */
895c072c8eSSepherosa Ziehau data = sc->ic_buf;
905c072c8eSSepherosa Ziehau dlen = sc->ic_buflen;
915c072c8eSSepherosa Ziehau error = vmbus_chan_recv(chan, data, &dlen, &xactid);
925c072c8eSSepherosa Ziehau KASSERT(error != ENOBUFS, ("icbuf is not large enough"));
935c072c8eSSepherosa Ziehau if (error)
945c072c8eSSepherosa Ziehau return;
955c072c8eSSepherosa Ziehau
965c072c8eSSepherosa Ziehau if (dlen < sizeof(*hdr)) {
975c072c8eSSepherosa Ziehau device_printf(sc->ic_dev, "invalid data len %d\n", dlen);
985c072c8eSSepherosa Ziehau return;
995c072c8eSSepherosa Ziehau }
1005c072c8eSSepherosa Ziehau hdr = data;
1015c072c8eSSepherosa Ziehau
1025c072c8eSSepherosa Ziehau /*
1035c072c8eSSepherosa Ziehau * Update request, which will be echoed back as response.
1045c072c8eSSepherosa Ziehau */
1055c072c8eSSepherosa Ziehau switch (hdr->ic_type) {
1065c072c8eSSepherosa Ziehau case VMBUS_ICMSG_TYPE_NEGOTIATE:
1075c072c8eSSepherosa Ziehau error = vmbus_ic_negomsg(sc, data, &dlen,
1085c072c8eSSepherosa Ziehau VMBUS_HEARTBEAT_FWVER, VMBUS_HEARTBEAT_MSGVER);
1095c072c8eSSepherosa Ziehau if (error)
1105c072c8eSSepherosa Ziehau return;
1115c072c8eSSepherosa Ziehau break;
1125c072c8eSSepherosa Ziehau
1135c072c8eSSepherosa Ziehau case VMBUS_ICMSG_TYPE_HEARTBEAT:
1145c072c8eSSepherosa Ziehau /* Only ic_seq is a must */
1155c072c8eSSepherosa Ziehau if (dlen < VMBUS_ICMSG_HEARTBEAT_SIZE_MIN) {
1165c072c8eSSepherosa Ziehau device_printf(sc->ic_dev, "invalid heartbeat len %d\n",
1175c072c8eSSepherosa Ziehau dlen);
1185c072c8eSSepherosa Ziehau return;
1195c072c8eSSepherosa Ziehau }
1205c072c8eSSepherosa Ziehau ((struct vmbus_icmsg_heartbeat *)data)->ic_seq++;
1215c072c8eSSepherosa Ziehau break;
1225c072c8eSSepherosa Ziehau
1235c072c8eSSepherosa Ziehau default:
1245c072c8eSSepherosa Ziehau device_printf(sc->ic_dev, "got 0x%08x icmsg\n", hdr->ic_type);
1255c072c8eSSepherosa Ziehau break;
1265c072c8eSSepherosa Ziehau }
1275c072c8eSSepherosa Ziehau
1285c072c8eSSepherosa Ziehau /*
1295c072c8eSSepherosa Ziehau * Send response by echoing the request back.
1305c072c8eSSepherosa Ziehau */
1315c072c8eSSepherosa Ziehau vmbus_ic_sendresp(sc, chan, data, dlen, xactid);
1325c072c8eSSepherosa Ziehau }
1335c072c8eSSepherosa Ziehau
1345c072c8eSSepherosa Ziehau static int
vmbus_heartbeat_probe(device_t dev)1355c072c8eSSepherosa Ziehau vmbus_heartbeat_probe(device_t dev)
1365c072c8eSSepherosa Ziehau {
1375c072c8eSSepherosa Ziehau
1385c072c8eSSepherosa Ziehau return (vmbus_ic_probe(dev, vmbus_heartbeat_descs));
1395c072c8eSSepherosa Ziehau }
1405c072c8eSSepherosa Ziehau
1415c072c8eSSepherosa Ziehau static int
vmbus_heartbeat_attach(device_t dev)1425c072c8eSSepherosa Ziehau vmbus_heartbeat_attach(device_t dev)
1435c072c8eSSepherosa Ziehau {
1445c072c8eSSepherosa Ziehau
1455c072c8eSSepherosa Ziehau return (vmbus_ic_attach(dev, vmbus_heartbeat_cb));
1465c072c8eSSepherosa Ziehau }
147