1295958Ssephe/*- 2298446Ssephe * Copyright (c) 2014,2016 Microsoft Corp. 3295958Ssephe * All rights reserved. 4295958Ssephe * 5295958Ssephe * Redistribution and use in source and binary forms, with or without 6295958Ssephe * modification, are permitted provided that the following conditions 7295958Ssephe * are met: 8295958Ssephe * 1. Redistributions of source code must retain the above copyright 9295958Ssephe * notice unmodified, this list of conditions, and the following 10295958Ssephe * disclaimer. 11295958Ssephe * 2. Redistributions in binary form must reproduce the above copyright 12295958Ssephe * notice, this list of conditions and the following disclaimer in the 13295958Ssephe * documentation and/or other materials provided with the distribution. 14295958Ssephe * 15295958Ssephe * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16295958Ssephe * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17295958Ssephe * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18295958Ssephe * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19295958Ssephe * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20295958Ssephe * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21295958Ssephe * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22295958Ssephe * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23295958Ssephe * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24295958Ssephe * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25295958Ssephe */ 26295958Ssephe 27304786Ssephe#include <sys/cdefs.h> 28304786Ssephe__FBSDID("$FreeBSD: stable/11/sys/dev/hyperv/utilities/vmbus_heartbeat.c 311386 2017-01-05 08:34:08Z sephe $"); 29304786Ssephe 30295958Ssephe#include <sys/param.h> 31304786Ssephe#include <sys/bus.h> 32295958Ssephe#include <sys/kernel.h> 33295958Ssephe#include <sys/module.h> 34303422Ssephe#include <sys/systm.h> 35295958Ssephe 36295958Ssephe#include <dev/hyperv/include/hyperv.h> 37302880Ssephe#include <dev/hyperv/include/vmbus.h> 38304786Ssephe#include <dev/hyperv/utilities/vmbus_icreg.h> 39310314Ssephe#include <dev/hyperv/utilities/vmbus_icvar.h> 40304786Ssephe 41307845Ssephe#define VMBUS_HEARTBEAT_FWVER_MAJOR 3 42307845Ssephe#define VMBUS_HEARTBEAT_FWVER \ 43307845Ssephe VMBUS_IC_VERSION(VMBUS_HEARTBEAT_FWVER_MAJOR, 0) 44307845Ssephe 45307845Ssephe#define VMBUS_HEARTBEAT_MSGVER_MAJOR 3 46307845Ssephe#define VMBUS_HEARTBEAT_MSGVER \ 47307845Ssephe VMBUS_IC_VERSION(VMBUS_HEARTBEAT_MSGVER_MAJOR, 0) 48307845Ssephe 49310318Ssephestatic int vmbus_heartbeat_probe(device_t); 50310318Ssephestatic int vmbus_heartbeat_attach(device_t); 51310318Ssephe 52304273Ssephestatic const struct vmbus_ic_desc vmbus_heartbeat_descs[] = { 53304273Ssephe { 54304273Ssephe .ic_guid = { .hv_guid = { 55304273Ssephe 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e, 56304273Ssephe 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d} }, 57304273Ssephe .ic_desc = "Hyper-V Heartbeat" 58304273Ssephe }, 59304273Ssephe VMBUS_IC_DESC_END 60304273Ssephe}; 61295958Ssephe 62310318Ssephestatic device_method_t vmbus_heartbeat_methods[] = { 63310318Ssephe /* Device interface */ 64310318Ssephe DEVMETHOD(device_probe, vmbus_heartbeat_probe), 65310318Ssephe DEVMETHOD(device_attach, vmbus_heartbeat_attach), 66310318Ssephe DEVMETHOD(device_detach, vmbus_ic_detach), 67310318Ssephe DEVMETHOD_END 68310318Ssephe}; 69310318Ssephe 70310318Ssephestatic driver_t vmbus_heartbeat_driver = { 71310318Ssephe "hvheartbeat", 72310318Ssephe vmbus_heartbeat_methods, 73310318Ssephe sizeof(struct vmbus_ic_softc) 74310318Ssephe}; 75310318Ssephe 76310318Ssephestatic devclass_t vmbus_heartbeat_devclass; 77310318Ssephe 78310318SsepheDRIVER_MODULE(hv_heartbeat, vmbus, vmbus_heartbeat_driver, 79310318Ssephe vmbus_heartbeat_devclass, NULL, NULL); 80310318SsepheMODULE_VERSION(hv_heartbeat, 1); 81310318SsepheMODULE_DEPEND(hv_heartbeat, vmbus, 1, 1, 1); 82310318Ssephe 83295958Ssephestatic void 84304786Ssephevmbus_heartbeat_cb(struct vmbus_channel *chan, void *xsc) 85295958Ssephe{ 86310313Ssephe struct vmbus_ic_softc *sc = xsc; 87304786Ssephe struct vmbus_icmsg_hdr *hdr; 88304786Ssephe int dlen, error; 89304786Ssephe uint64_t xactid; 90304786Ssephe void *data; 91295958Ssephe 92304786Ssephe /* 93304786Ssephe * Receive request. 94304786Ssephe */ 95310313Ssephe data = sc->ic_buf; 96304786Ssephe dlen = sc->ic_buflen; 97304786Ssephe error = vmbus_chan_recv(chan, data, &dlen, &xactid); 98304786Ssephe KASSERT(error != ENOBUFS, ("icbuf is not large enough")); 99304786Ssephe if (error) 100304786Ssephe return; 101295958Ssephe 102305279Ssephe if (dlen < sizeof(*hdr)) { 103304786Ssephe device_printf(sc->ic_dev, "invalid data len %d\n", dlen); 104304786Ssephe return; 105304786Ssephe } 106304786Ssephe hdr = data; 107295958Ssephe 108304786Ssephe /* 109304786Ssephe * Update request, which will be echoed back as response. 110304786Ssephe */ 111304786Ssephe switch (hdr->ic_type) { 112304786Ssephe case VMBUS_ICMSG_TYPE_NEGOTIATE: 113307845Ssephe error = vmbus_ic_negomsg(sc, data, &dlen, 114307845Ssephe VMBUS_HEARTBEAT_FWVER, VMBUS_HEARTBEAT_MSGVER); 115304730Ssephe if (error) 116304730Ssephe return; 117304786Ssephe break; 118295958Ssephe 119304786Ssephe case VMBUS_ICMSG_TYPE_HEARTBEAT: 120304786Ssephe /* Only ic_seq is a must */ 121304786Ssephe if (dlen < VMBUS_ICMSG_HEARTBEAT_SIZE_MIN) { 122304786Ssephe device_printf(sc->ic_dev, "invalid heartbeat len %d\n", 123304786Ssephe dlen); 124304786Ssephe return; 125304786Ssephe } 126304786Ssephe ((struct vmbus_icmsg_heartbeat *)data)->ic_seq++; 127304786Ssephe break; 128295958Ssephe 129304786Ssephe default: 130304786Ssephe device_printf(sc->ic_dev, "got 0x%08x icmsg\n", hdr->ic_type); 131304786Ssephe break; 132304786Ssephe } 133295958Ssephe 134304786Ssephe /* 135310312Ssephe * Send response by echoing the request back. 136304786Ssephe */ 137310312Ssephe vmbus_ic_sendresp(sc, chan, data, dlen, xactid); 138295958Ssephe} 139295958Ssephe 140295958Ssephestatic int 141310318Ssephevmbus_heartbeat_probe(device_t dev) 142295958Ssephe{ 143297220Ssephe 144304273Ssephe return (vmbus_ic_probe(dev, vmbus_heartbeat_descs)); 145295958Ssephe} 146295958Ssephe 147295958Ssephestatic int 148310318Ssephevmbus_heartbeat_attach(device_t dev) 149295958Ssephe{ 150304786Ssephe 151310313Ssephe return (vmbus_ic_attach(dev, vmbus_heartbeat_cb)); 152295958Ssephe} 153