1 /*- 2 * Copyright (c) 2014,2016 Microsoft Corp. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/param.h> 28 #include <sys/bus.h> 29 #include <sys/kernel.h> 30 #include <sys/module.h> 31 #include <sys/reboot.h> 32 #include <sys/systm.h> 33 34 #include <dev/hyperv/include/hyperv.h> 35 #include <dev/hyperv/include/vmbus.h> 36 #include <dev/hyperv/utilities/vmbus_icreg.h> 37 #include <dev/hyperv/utilities/vmbus_icvar.h> 38 39 #define VMBUS_SHUTDOWN_FWVER_MAJOR 3 40 #define VMBUS_SHUTDOWN_FWVER \ 41 VMBUS_IC_VERSION(VMBUS_SHUTDOWN_FWVER_MAJOR, 0) 42 43 #define VMBUS_SHUTDOWN_MSGVER_MAJOR 3 44 #define VMBUS_SHUTDOWN_MSGVER \ 45 VMBUS_IC_VERSION(VMBUS_SHUTDOWN_MSGVER_MAJOR, 0) 46 47 static int vmbus_shutdown_probe(device_t); 48 static int vmbus_shutdown_attach(device_t); 49 50 static const struct vmbus_ic_desc vmbus_shutdown_descs[] = { 51 { 52 .ic_guid = { .hv_guid = { 53 0x31, 0x60, 0x0b, 0x0e, 0x13, 0x52, 0x34, 0x49, 54 0x81, 0x8b, 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb } }, 55 .ic_desc = "Hyper-V Shutdown" 56 }, 57 VMBUS_IC_DESC_END 58 }; 59 60 static device_method_t vmbus_shutdown_methods[] = { 61 /* Device interface */ 62 DEVMETHOD(device_probe, vmbus_shutdown_probe), 63 DEVMETHOD(device_attach, vmbus_shutdown_attach), 64 DEVMETHOD(device_detach, vmbus_ic_detach), 65 DEVMETHOD_END 66 }; 67 68 static driver_t vmbus_shutdown_driver = { 69 "hvshutdown", 70 vmbus_shutdown_methods, 71 sizeof(struct vmbus_ic_softc) 72 }; 73 74 DRIVER_MODULE(hv_shutdown, vmbus, vmbus_shutdown_driver, NULL, NULL); 75 MODULE_VERSION(hv_shutdown, 1); 76 MODULE_DEPEND(hv_shutdown, vmbus, 1, 1, 1); 77 78 static void 79 vmbus_shutdown_cb(struct vmbus_channel *chan, void *xsc) 80 { 81 struct vmbus_ic_softc *sc = xsc; 82 struct vmbus_icmsg_hdr *hdr; 83 struct vmbus_icmsg_shutdown *msg; 84 int dlen, error, do_shutdown = 0; 85 uint64_t xactid; 86 void *data; 87 88 /* 89 * Receive request. 90 */ 91 data = sc->ic_buf; 92 dlen = sc->ic_buflen; 93 error = vmbus_chan_recv(chan, data, &dlen, &xactid); 94 KASSERT(error != ENOBUFS, ("icbuf is not large enough")); 95 if (error) 96 return; 97 98 if (dlen < sizeof(*hdr)) { 99 device_printf(sc->ic_dev, "invalid data len %d\n", dlen); 100 return; 101 } 102 hdr = data; 103 104 /* 105 * Update request, which will be echoed back as response. 106 */ 107 switch (hdr->ic_type) { 108 case VMBUS_ICMSG_TYPE_NEGOTIATE: 109 error = vmbus_ic_negomsg(sc, data, &dlen, 110 VMBUS_SHUTDOWN_FWVER, VMBUS_SHUTDOWN_MSGVER); 111 if (error) 112 return; 113 break; 114 115 case VMBUS_ICMSG_TYPE_SHUTDOWN: 116 if (dlen < VMBUS_ICMSG_SHUTDOWN_SIZE_MIN) { 117 device_printf(sc->ic_dev, "invalid shutdown len %d\n", 118 dlen); 119 return; 120 } 121 msg = data; 122 123 /* XXX ic_flags definition? */ 124 if (msg->ic_haltflags == 0 || msg->ic_haltflags == 1) { 125 device_printf(sc->ic_dev, "shutdown requested\n"); 126 hdr->ic_status = VMBUS_ICMSG_STATUS_OK; 127 do_shutdown = 1; 128 } else { 129 device_printf(sc->ic_dev, "unknown shutdown flags " 130 "0x%08x\n", msg->ic_haltflags); 131 hdr->ic_status = VMBUS_ICMSG_STATUS_FAIL; 132 } 133 break; 134 135 default: 136 device_printf(sc->ic_dev, "got 0x%08x icmsg\n", hdr->ic_type); 137 break; 138 } 139 140 /* 141 * Send response by echoing the request back. 142 */ 143 vmbus_ic_sendresp(sc, chan, data, dlen, xactid); 144 145 if (do_shutdown) 146 shutdown_nice(RB_POWEROFF); 147 } 148 149 static int 150 vmbus_shutdown_probe(device_t dev) 151 { 152 153 return (vmbus_ic_probe(dev, vmbus_shutdown_descs)); 154 } 155 156 static int 157 vmbus_shutdown_attach(device_t dev) 158 { 159 160 return (vmbus_ic_attach(dev, vmbus_shutdown_cb)); 161 } 162