hvshutdown.c revision 1.2.2.2
1 1.2.2.2 martin /* $NetBSD: hvshutdown.c,v 1.2.2.2 2019/03/09 17:10:19 martin Exp $ */ 2 1.2.2.2 martin 3 1.2.2.2 martin /*- 4 1.2.2.2 martin * Copyright (c) 2014,2016 Microsoft Corp. 5 1.2.2.2 martin * All rights reserved. 6 1.2.2.2 martin * 7 1.2.2.2 martin * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 martin * modification, are permitted provided that the following conditions 9 1.2.2.2 martin * are met: 10 1.2.2.2 martin * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 martin * notice unmodified, this list of conditions, and the following 12 1.2.2.2 martin * disclaimer. 13 1.2.2.2 martin * 2. Redistributions in binary form must reproduce the above copyright 14 1.2.2.2 martin * notice, this list of conditions and the following disclaimer in the 15 1.2.2.2 martin * documentation and/or other materials provided with the distribution. 16 1.2.2.2 martin * 17 1.2.2.2 martin * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 1.2.2.2 martin * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 1.2.2.2 martin * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 1.2.2.2 martin * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 1.2.2.2 martin * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 1.2.2.2 martin * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 1.2.2.2 martin * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 1.2.2.2 martin * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 1.2.2.2 martin * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 1.2.2.2 martin * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 1.2.2.2 martin */ 28 1.2.2.2 martin 29 1.2.2.2 martin #include <sys/cdefs.h> 30 1.2.2.2 martin #ifdef __KERNEL_RCSID 31 1.2.2.2 martin __KERNEL_RCSID(0, "$NetBSD: hvshutdown.c,v 1.2.2.2 2019/03/09 17:10:19 martin Exp $"); 32 1.2.2.2 martin #endif 33 1.2.2.2 martin #ifdef __FBSDID 34 1.2.2.2 martin __FBSDID("$FreeBSD: head/sys/dev/hyperv/utilities/vmbus_shutdown.c 310324 2016-12-20 09:46:14Z sephe $"); 35 1.2.2.2 martin #endif 36 1.2.2.2 martin 37 1.2.2.2 martin #include <sys/param.h> 38 1.2.2.2 martin #include <sys/systm.h> 39 1.2.2.2 martin #include <sys/device.h> 40 1.2.2.2 martin #include <sys/module.h> 41 1.2.2.2 martin #include <sys/pmf.h> 42 1.2.2.2 martin 43 1.2.2.2 martin #include <dev/sysmon/sysmonvar.h> 44 1.2.2.2 martin #include <dev/sysmon/sysmon_taskq.h> 45 1.2.2.2 martin 46 1.2.2.2 martin #include <dev/hyperv/vmbusvar.h> 47 1.2.2.2 martin #include <dev/hyperv/vmbusicreg.h> 48 1.2.2.2 martin #include <dev/hyperv/vmbusicvar.h> 49 1.2.2.2 martin 50 1.2.2.2 martin #define VMBUS_SHUTDOWN_FWVER_MAJOR 3 51 1.2.2.2 martin #define VMBUS_SHUTDOWN_FWVER \ 52 1.2.2.2 martin VMBUS_IC_VERSION(VMBUS_SHUTDOWN_FWVER_MAJOR, 0) 53 1.2.2.2 martin 54 1.2.2.2 martin #define VMBUS_SHUTDOWN_MSGVER_MAJOR 3 55 1.2.2.2 martin #define VMBUS_SHUTDOWN_MSGVER \ 56 1.2.2.2 martin VMBUS_IC_VERSION(VMBUS_SHUTDOWN_MSGVER_MAJOR, 0) 57 1.2.2.2 martin 58 1.2.2.2 martin static int hvshutdown_match(device_t, cfdata_t, void *); 59 1.2.2.2 martin static void hvshutdown_attach(device_t, device_t, void *); 60 1.2.2.2 martin static int hvshutdown_detach(device_t, int); 61 1.2.2.2 martin 62 1.2.2.2 martin static void hvshutdown_channel_cb(void *); 63 1.2.2.2 martin 64 1.2.2.2 martin struct hvshutdown_softc { 65 1.2.2.2 martin struct vmbusic_softc sc_vmbusic; 66 1.2.2.2 martin 67 1.2.2.2 martin struct sysmon_pswitch sc_smpsw; 68 1.2.2.2 martin }; 69 1.2.2.2 martin 70 1.2.2.2 martin CFATTACH_DECL_NEW(hvshutdown, sizeof(struct hvshutdown_softc), 71 1.2.2.2 martin hvshutdown_match, hvshutdown_attach, hvshutdown_detach, NULL); 72 1.2.2.2 martin 73 1.2.2.2 martin static int 74 1.2.2.2 martin hvshutdown_match(device_t parent, cfdata_t cf, void *aux) 75 1.2.2.2 martin { 76 1.2.2.2 martin struct vmbus_attach_args *aa = aux; 77 1.2.2.2 martin 78 1.2.2.2 martin return vmbusic_probe(aa, &hyperv_guid_shutdown); 79 1.2.2.2 martin } 80 1.2.2.2 martin 81 1.2.2.2 martin static void 82 1.2.2.2 martin hvshutdown_attach(device_t parent, device_t self, void *aux) 83 1.2.2.2 martin { 84 1.2.2.2 martin struct hvshutdown_softc *sc = device_private(self); 85 1.2.2.2 martin struct vmbus_attach_args *aa = aux; 86 1.2.2.2 martin int error; 87 1.2.2.2 martin 88 1.2.2.2 martin aprint_naive("\n"); 89 1.2.2.2 martin aprint_normal(": Hyper-V Guest Shutdown Service\n"); 90 1.2.2.2 martin 91 1.2.2.2 martin error = vmbusic_attach(self, aa, hvshutdown_channel_cb); 92 1.2.2.2 martin if (error) 93 1.2.2.2 martin return; 94 1.2.2.2 martin 95 1.2.2.2 martin (void) pmf_device_register(self, NULL, NULL); 96 1.2.2.2 martin 97 1.2.2.2 martin sysmon_task_queue_init(); 98 1.2.2.2 martin 99 1.2.2.2 martin sc->sc_smpsw.smpsw_name = device_xname(self); 100 1.2.2.2 martin sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER; 101 1.2.2.2 martin (void) sysmon_pswitch_register(&sc->sc_smpsw); 102 1.2.2.2 martin } 103 1.2.2.2 martin 104 1.2.2.2 martin static int 105 1.2.2.2 martin hvshutdown_detach(device_t self, int flags) 106 1.2.2.2 martin { 107 1.2.2.2 martin struct hvshutdown_softc *sc = device_private(self); 108 1.2.2.2 martin int error; 109 1.2.2.2 martin 110 1.2.2.2 martin error = vmbusic_detach(self, flags); 111 1.2.2.2 martin if (error) 112 1.2.2.2 martin return error; 113 1.2.2.2 martin 114 1.2.2.2 martin pmf_device_deregister(self); 115 1.2.2.2 martin sysmon_pswitch_unregister(&sc->sc_smpsw); 116 1.2.2.2 martin 117 1.2.2.2 martin return 0; 118 1.2.2.2 martin } 119 1.2.2.2 martin 120 1.2.2.2 martin static void 121 1.2.2.2 martin hvshutdown_do_shutdown(void *arg) 122 1.2.2.2 martin { 123 1.2.2.2 martin struct hvshutdown_softc *sc = arg; 124 1.2.2.2 martin 125 1.2.2.2 martin sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED); 126 1.2.2.2 martin } 127 1.2.2.2 martin 128 1.2.2.2 martin static void 129 1.2.2.2 martin hvshutdown_channel_cb(void *arg) 130 1.2.2.2 martin { 131 1.2.2.2 martin struct hvshutdown_softc *sc = arg; 132 1.2.2.2 martin struct vmbusic_softc *vsc = &sc->sc_vmbusic; 133 1.2.2.2 martin struct vmbus_channel *ch = vsc->sc_chan; 134 1.2.2.2 martin struct vmbus_icmsg_hdr *hdr; 135 1.2.2.2 martin struct vmbus_icmsg_shutdown *msg; 136 1.2.2.2 martin uint64_t rid; 137 1.2.2.2 martin uint32_t rlen; 138 1.2.2.2 martin int error; 139 1.2.2.2 martin bool do_shutdown = false; 140 1.2.2.2 martin 141 1.2.2.2 martin error = vmbus_channel_recv(ch, vsc->sc_buf, vsc->sc_buflen, 142 1.2.2.2 martin &rlen, &rid, 0); 143 1.2.2.2 martin if (error || rlen == 0) { 144 1.2.2.2 martin if (error != EAGAIN) { 145 1.2.2.2 martin DPRINTF("%s: shutdown error=%d len=%u\n", 146 1.2.2.2 martin device_xname(vsc->sc_dev), error, rlen); 147 1.2.2.2 martin } 148 1.2.2.2 martin return; 149 1.2.2.2 martin } 150 1.2.2.2 martin if (rlen < sizeof(*hdr)) { 151 1.2.2.2 martin DPRINTF("%s: shutdown short read len=%u\n", 152 1.2.2.2 martin device_xname(vsc->sc_dev), rlen); 153 1.2.2.2 martin return; 154 1.2.2.2 martin } 155 1.2.2.2 martin 156 1.2.2.2 martin hdr = (struct vmbus_icmsg_hdr *)vsc->sc_buf; 157 1.2.2.2 martin switch (hdr->ic_type) { 158 1.2.2.2 martin case VMBUS_ICMSG_TYPE_NEGOTIATE: 159 1.2.2.2 martin error = vmbusic_negotiate(vsc, hdr, &rlen, VMBUS_SHUTDOWN_FWVER, 160 1.2.2.2 martin VMBUS_SHUTDOWN_MSGVER); 161 1.2.2.2 martin if (error) 162 1.2.2.2 martin return; 163 1.2.2.2 martin break; 164 1.2.2.2 martin 165 1.2.2.2 martin case VMBUS_ICMSG_TYPE_SHUTDOWN: 166 1.2.2.2 martin if (rlen < VMBUS_ICMSG_SHUTDOWN_SIZE_MIN) { 167 1.2.2.2 martin DPRINTF("%s: invalid shutdown len=%u\n", 168 1.2.2.2 martin device_xname(vsc->sc_dev), rlen); 169 1.2.2.2 martin return; 170 1.2.2.2 martin } 171 1.2.2.2 martin 172 1.2.2.2 martin msg = (struct vmbus_icmsg_shutdown *)hdr; 173 1.2.2.2 martin if (msg->ic_haltflags == 0 || msg->ic_haltflags == 1) { 174 1.2.2.2 martin device_printf(vsc->sc_dev, "shutdown requested\n"); 175 1.2.2.2 martin hdr->ic_status = VMBUS_ICMSG_STATUS_OK; 176 1.2.2.2 martin do_shutdown = true; 177 1.2.2.2 martin } else { 178 1.2.2.2 martin device_printf(vsc->sc_dev, 179 1.2.2.2 martin "unknown shutdown flags 0x%08x\n", 180 1.2.2.2 martin msg->ic_haltflags); 181 1.2.2.2 martin hdr->ic_status = VMBUS_ICMSG_STATUS_FAIL; 182 1.2.2.2 martin } 183 1.2.2.2 martin break; 184 1.2.2.2 martin 185 1.2.2.2 martin default: 186 1.2.2.2 martin device_printf(vsc->sc_dev, 187 1.2.2.2 martin "unhandled shutdown message type %u\n", hdr->ic_type); 188 1.2.2.2 martin return; 189 1.2.2.2 martin } 190 1.2.2.2 martin 191 1.2.2.2 martin (void) vmbusic_sendresp(vsc, ch, vsc->sc_buf, rlen, rid); 192 1.2.2.2 martin 193 1.2.2.2 martin if (do_shutdown) 194 1.2.2.2 martin sysmon_task_queue_sched(0, hvshutdown_do_shutdown, sc); 195 1.2.2.2 martin } 196 1.2.2.2 martin 197 1.2.2.2 martin MODULE(MODULE_CLASS_DRIVER, hvshutdown, "vmbus"); 198 1.2.2.2 martin 199 1.2.2.2 martin #ifdef _MODULE 200 1.2.2.2 martin #include "ioconf.c" 201 1.2.2.2 martin #endif 202 1.2.2.2 martin 203 1.2.2.2 martin static int 204 1.2.2.2 martin hvshutdown_modcmd(modcmd_t cmd, void *aux) 205 1.2.2.2 martin { 206 1.2.2.2 martin int error = 0; 207 1.2.2.2 martin 208 1.2.2.2 martin switch (cmd) { 209 1.2.2.2 martin case MODULE_CMD_INIT: 210 1.2.2.2 martin #ifdef _MODULE 211 1.2.2.2 martin error = config_init_component(cfdriver_ioconf_hvshutdown, 212 1.2.2.2 martin cfattach_ioconf_hvshutdown, cfdata_ioconf_hvshutdown); 213 1.2.2.2 martin #endif 214 1.2.2.2 martin break; 215 1.2.2.2 martin 216 1.2.2.2 martin case MODULE_CMD_FINI: 217 1.2.2.2 martin #ifdef _MODULE 218 1.2.2.2 martin error = config_fini_component(cfdriver_ioconf_hvshutdown, 219 1.2.2.2 martin cfattach_ioconf_hvshutdown, cfdata_ioconf_hvshutdown); 220 1.2.2.2 martin #endif 221 1.2.2.2 martin break; 222 1.2.2.2 martin 223 1.2.2.2 martin case MODULE_CMD_AUTOUNLOAD: 224 1.2.2.2 martin error = EBUSY; 225 1.2.2.2 martin break; 226 1.2.2.2 martin 227 1.2.2.2 martin default: 228 1.2.2.2 martin error = ENOTTY; 229 1.2.2.2 martin break; 230 1.2.2.2 martin } 231 1.2.2.2 martin 232 1.2.2.2 martin return error; 233 1.2.2.2 martin } 234
Indexes created Tue Sep 30 07:10:03 GMT 2025