/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2006 IronPort Systems Inc. * 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, 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef LOCAL_MODULE #include #include #else #include #include #endif #ifdef IPMICTL_SEND_COMMAND_32 #include #endif /* * Driver request structures are allocated on the stack via alloca() to * avoid calling malloc(), especially for the watchdog handler. * To avoid too much stack growth, a previously allocated structure can * be reused via IPMI_INIT_DRIVER_REQUEST(), but the caller should ensure * that there is adequate reply/request space in the original allocation. */ #define IPMI_INIT_DRIVER_REQUEST(req, addr, cmd, reqlen, replylen) \ bzero((req), sizeof(struct ipmi_request)); \ ipmi_init_request((req), NULL, 0, (addr), (cmd), (reqlen), (replylen)) #define IPMI_ALLOC_DRIVER_REQUEST(req, addr, cmd, reqlen, replylen) \ (req) = __builtin_alloca(sizeof(struct ipmi_request) + \ (reqlen) + (replylen)); \ IPMI_INIT_DRIVER_REQUEST((req), (addr), (cmd), (reqlen), \ (replylen)) static d_ioctl_t ipmi_ioctl; static d_poll_t ipmi_poll; static d_open_t ipmi_open; static void ipmi_dtor(void *arg); int ipmi_attached = 0; static int on = 1; static bool wd_in_shutdown = false; static int wd_timer_actions = IPMI_SET_WD_ACTION_POWER_CYCLE; static int wd_shutdown_countdown = 0; /* sec */ static int wd_startup_countdown = 0; /* sec */ static int wd_pretimeout_countdown = 120; /* sec */ static int cycle_wait = 10; /* sec */ static int wd_init_enable = 1; static SYSCTL_NODE(_hw, OID_AUTO, ipmi, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "IPMI driver parameters"); SYSCTL_INT(_hw_ipmi, OID_AUTO, on, CTLFLAG_RWTUN, &on, 0, ""); SYSCTL_INT(_hw_ipmi, OID_AUTO, wd_init_enable, CTLFLAG_RWTUN, &wd_init_enable, 1, "Enable watchdog initialization"); SYSCTL_INT(_hw_ipmi, OID_AUTO, wd_timer_actions, CTLFLAG_RWTUN, &wd_timer_actions, 0, "IPMI watchdog timer actions (including pre-timeout interrupt)"); SYSCTL_INT(_hw_ipmi, OID_AUTO, wd_shutdown_countdown, CTLFLAG_RWTUN, &wd_shutdown_countdown, 0, "IPMI watchdog countdown for shutdown (seconds)"); SYSCTL_INT(_hw_ipmi, OID_AUTO, wd_startup_countdown, CTLFLAG_RDTUN, &wd_startup_countdown, 0, "IPMI watchdog countdown initialized during startup (seconds)"); SYSCTL_INT(_hw_ipmi, OID_AUTO, wd_pretimeout_countdown, CTLFLAG_RWTUN, &wd_pretimeout_countdown, 0, "IPMI watchdog pre-timeout countdown (seconds)"); SYSCTL_INT(_hw_ipmi, OID_AUTO, cycle_wait, CTLFLAG_RWTUN, &cycle_wait, 0, "IPMI power cycle on reboot delay time (seconds)"); static struct cdevsw ipmi_cdevsw = { .d_version = D_VERSION, .d_open = ipmi_open, .d_ioctl = ipmi_ioctl, .d_poll = ipmi_poll, .d_name = "ipmi", }; static MALLOC_DEFINE(M_IPMI, "ipmi", "ipmi"); static int ipmi_open(struct cdev *cdev, int flags, int fmt, struct thread *td) { struct ipmi_device *dev; struct ipmi_softc *sc; int error; if (!on) return (ENOENT); /* Initialize the per file descriptor data. */ dev = malloc(sizeof(struct ipmi_device), M_IPMI, M_WAITOK | M_ZERO); error = devfs_set_cdevpriv(dev, ipmi_dtor); if (error) { free(dev, M_IPMI); return (error); } sc = cdev->si_drv1; TAILQ_INIT(&dev->ipmi_completed_requests); dev->ipmi_address = IPMI_BMC_SLAVE_ADDR; dev->ipmi_lun = IPMI_BMC_SMS_LUN; dev->ipmi_softc = sc; IPMI_LOCK(sc); sc->ipmi_opened++; IPMI_UNLOCK(sc); return (0); } static int ipmi_poll(struct cdev *cdev, int poll_events, struct thread *td) { struct ipmi_device *dev; struct ipmi_softc *sc; int revents = 0; if (devfs_get_cdevpriv((void **)&dev)) return (0); sc = cdev->si_drv1; IPMI_LOCK(sc); if (poll_events & (POLLIN | POLLRDNORM)) { if (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) revents |= poll_events & (POLLIN | POLLRDNORM); if (dev->ipmi_requests == 0) revents |= POLLERR; } if (revents == 0) { if (poll_events & (POLLIN | POLLRDNORM)) selrecord(td, &dev->ipmi_select); } IPMI_UNLOCK(sc); return (revents); } static void ipmi_purge_completed_requests(struct ipmi_device *dev) { struct ipmi_request *req; while (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) { req = TAILQ_FIRST(&dev->ipmi_completed_requests); TAILQ_REMOVE(&dev->ipmi_completed_requests, req, ir_link); dev->ipmi_requests--; ipmi_free_request(req); } } static void ipmi_dtor(void *arg) { struct ipmi_request *req, *nreq; struct ipmi_device *dev; struct ipmi_softc *sc; dev = arg; sc = dev->ipmi_softc; IPMI_LOCK(sc); if (dev->ipmi_requests) { /* Throw away any pending requests for this device. */ TAILQ_FOREACH_SAFE(req, &sc->ipmi_pending_requests_highpri, ir_link, nreq) { if (req->ir_owner == dev) { TAILQ_REMOVE(&sc->ipmi_pending_requests_highpri, req, ir_link); dev->ipmi_requests--; ipmi_free_request(req); } } TAILQ_FOREACH_SAFE(req, &sc->ipmi_pending_requests, ir_link, nreq) { if (req->ir_owner == dev) { TAILQ_REMOVE(&sc->ipmi_pending_requests, req, ir_link); dev->ipmi_requests--; ipmi_free_request(req); } } /* Throw away any pending completed requests for this device. */ ipmi_purge_completed_requests(dev); /* * If we still have outstanding requests, they must be stuck * in an interface driver, so wait for those to drain. */ dev->ipmi_closing = 1; while (dev->ipmi_requests > 0) { msleep(&dev->ipmi_requests, &sc->ipmi_requests_lock, PWAIT, "ipmidrain", 0); ipmi_purge_completed_requests(dev); } } sc->ipmi_opened--; IPMI_UNLOCK(sc); /* Cleanup. */ free(dev, M_IPMI); } static u_char ipmi_ipmb_checksum(u_char *data, int len) { u_char sum = 0; for (; len; len--) sum += *data++; return (-sum); } static int ipmi_ioctl(struct cdev *cdev, u_long cmd, caddr_t data, int flags, struct thread *td) { struct ipmi_softc *sc; struct ipmi_device *dev; struct ipmi_request *kreq; struct ipmi_req *req = (struct ipmi_req *)data; struct ipmi_recv *recv = (struct ipmi_recv *)data; struct ipmi_addr addr; #ifdef IPMICTL_SEND_COMMAND_32 struct ipmi_req32 *req32 = (struct ipmi_req32 *)data; struct ipmi_recv32 *recv32 = (struct ipmi_recv32 *)data; union { struct ipmi_req req; struct ipmi_recv recv; } thunk32; #endif int error, len; error = devfs_get_cdevpriv((void **)&dev); if (error) return (error); sc = cdev->si_drv1; #ifdef IPMICTL_SEND_COMMAND_32 /* Convert 32-bit structures to native. */ switch (cmd) { case IPMICTL_SEND_COMMAND_32: req = &thunk32.req; req->addr = PTRIN(req32->addr); req->addr_len = req32->addr_len; req->msgid = req32->msgid; req->msg.netfn = req32->msg.netfn; req->msg.cmd = req32->msg.cmd; req->msg.data_len = req32->msg.data_len; req->msg.data = PTRIN(req32->msg.data); break; case IPMICTL_RECEIVE_MSG_TRUNC_32: case IPMICTL_RECEIVE_MSG_32: recv = &thunk32.recv; recv->addr = PTRIN(recv32->addr); recv->addr_len = recv32->addr_len; recv->msg.data_len = recv32->msg.data_len; recv->msg.data = PTRIN(recv32->msg.data); break; } #endif switch (cmd) { #ifdef IPMICTL_SEND_COMMAND_32 case IPMICTL_SEND_COMMAND_32: #endif case IPMICTL_SEND_COMMAND: error = copyin(req->addr, &addr, sizeof(addr)); if (error) return (error); if (addr.addr_type == IPMI_SYSTEM_INTERFACE_ADDR_TYPE) { struct ipmi_system_interface_addr *saddr = (struct ipmi_system_interface_addr *)&addr; kreq = ipmi_alloc_request(dev, req->msgid, IPMI_ADDR(req->msg.netfn, saddr->lun & 0x3), req->msg.cmd, req->msg.data_len, IPMI_MAX_RX); error = copyin(req->msg.data, kreq->ir_request, req->msg.data_len); if (error) { ipmi_free_request(kreq); return (error); } IPMI_LOCK(sc); dev->ipmi_requests++; error = sc->ipmi_enqueue_request(sc, kreq); IPMI_UNLOCK(sc); if (error) return (error); break; } /* Special processing for IPMB commands */ struct ipmi_ipmb_addr *iaddr = (struct ipmi_ipmb_addr *)&addr; IPMI_ALLOC_DRIVER_REQUEST(kreq, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_SEND_MSG, req->msg.data_len + 8, IPMI_MAX_RX); /* Construct the SEND MSG header */ kreq->ir_request[0] = iaddr->channel; kreq->ir_request[1] = iaddr->slave_addr; kreq->ir_request[2] = IPMI_ADDR(req->msg.netfn, iaddr->lun); kreq->ir_request[3] = ipmi_ipmb_checksum(&kreq->ir_request[1], 2); kreq->ir_request[4] = dev->ipmi_address; kreq->ir_request[5] = IPMI_ADDR(0, dev->ipmi_lun); kreq->ir_request[6] = req->msg.cmd; /* Copy the message data */ if (req->msg.data_len > 0) { error = copyin(req->msg.data, &kreq->ir_request[7], req->msg.data_len); if (error != 0) return (error); } kreq->ir_request[req->msg.data_len + 7] = ipmi_ipmb_checksum(&kreq->ir_request[4], req->msg.data_len + 3); error = ipmi_submit_driver_request(sc, kreq, MAX_TIMEOUT); if (error != 0) return (error); kreq = ipmi_alloc_request(dev, req->msgid, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_MSG, 0, IPMI_MAX_RX); kreq->ir_ipmb = true; kreq->ir_ipmb_addr = IPMI_ADDR(req->msg.netfn, 0); kreq->ir_ipmb_command = req->msg.cmd; IPMI_LOCK(sc); dev->ipmi_requests++; error = sc->ipmi_enqueue_request(sc, kreq); IPMI_UNLOCK(sc); if (error != 0) return (error); break; #ifdef IPMICTL_SEND_COMMAND_32 case IPMICTL_RECEIVE_MSG_TRUNC_32: case IPMICTL_RECEIVE_MSG_32: #endif case IPMICTL_RECEIVE_MSG_TRUNC: case IPMICTL_RECEIVE_MSG: error = copyin(recv->addr, &addr, sizeof(addr)); if (error) return (error); IPMI_LOCK(sc); kreq = TAILQ_FIRST(&dev->ipmi_completed_requests); if (kreq == NULL) { IPMI_UNLOCK(sc); return (EAGAIN); } if (kreq->ir_error != 0) { error = kreq->ir_error; TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, ir_link); dev->ipmi_requests--; IPMI_UNLOCK(sc); ipmi_free_request(kreq); return (error); } recv->recv_type = IPMI_RESPONSE_RECV_TYPE; recv->msgid = kreq->ir_msgid; if (kreq->ir_ipmb) { addr.channel = IPMI_IPMB_CHANNEL; recv->msg.netfn = IPMI_REPLY_ADDR(kreq->ir_ipmb_addr) >> 2; recv->msg.cmd = kreq->ir_ipmb_command; /* Get the compcode of response */ kreq->ir_compcode = kreq->ir_reply[6]; /* Move the reply head past response header */ kreq->ir_reply += 7; len = kreq->ir_replylen - 7; } else { addr.channel = IPMI_BMC_CHANNEL; recv->msg.netfn = IPMI_REPLY_ADDR(kreq->ir_addr) >> 2; recv->msg.cmd = kreq->ir_command; len = kreq->ir_replylen + 1; } if (recv->msg.data_len < len && (cmd == IPMICTL_RECEIVE_MSG #ifdef IPMICTL_RECEIVE_MSG_32 || cmd == IPMICTL_RECEIVE_MSG_32 #endif )) { IPMI_UNLOCK(sc); return (EMSGSIZE); } TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, ir_link); dev->ipmi_requests--; IPMI_UNLOCK(sc); len = min(recv->msg.data_len, len); recv->msg.data_len = len; error = copyout(&addr, recv->addr,sizeof(addr)); if (error == 0) error = copyout(&kreq->ir_compcode, recv->msg.data, 1); if (error == 0) error = copyout(kreq->ir_reply, recv->msg.data + 1, len - 1); ipmi_free_request(kreq); if (error) return (error); break; case IPMICTL_SET_MY_ADDRESS_CMD: IPMI_LOCK(sc); dev->ipmi_address = *(int*)data; IPMI_UNLOCK(sc); break; case IPMICTL_GET_MY_ADDRESS_CMD: IPMI_LOCK(sc); *(int*)data = dev->ipmi_address; IPMI_UNLOCK(sc); break; case IPMICTL_SET_MY_LUN_CMD: IPMI_LOCK(sc); dev->ipmi_lun = *(int*)data & 0x3; IPMI_UNLOCK(sc); break; case IPMICTL_GET_MY_LUN_CMD: IPMI_LOCK(sc); *(int*)data = dev->ipmi_lun; IPMI_UNLOCK(sc); break; case IPMICTL_SET_GETS_EVENTS_CMD: /* device_printf(sc->ipmi_dev, "IPMICTL_SET_GETS_EVENTS_CMD NA\n"); */ break; case IPMICTL_REGISTER_FOR_CMD: case IPMICTL_UNREGISTER_FOR_CMD: return (EOPNOTSUPP); default: device_printf(sc->ipmi_dev, "Unknown IOCTL %lX\n", cmd); return (ENOIOCTL); } #ifdef IPMICTL_SEND_COMMAND_32 /* Update changed fields in 32-bit structures. */ switch (cmd) { case IPMICTL_RECEIVE_MSG_TRUNC_32: case IPMICTL_RECEIVE_MSG_32: recv32->recv_type = recv->recv_type; recv32->msgid = recv->msgid; recv32->msg.netfn = recv->msg.netfn; recv32->msg.cmd = recv->msg.cmd; recv32->msg.data_len = recv->msg.data_len; break; } #endif return (0); } /* * Request management. */ __inline void ipmi_init_request(struct ipmi_request *req, struct ipmi_device *dev, long msgid, uint8_t addr, uint8_t command, size_t requestlen, size_t replylen) { req->ir_owner = dev; req->ir_msgid = msgid; req->ir_addr = addr; req->ir_command = command; if (requestlen) { req->ir_request = (char *)&req[1]; req->ir_requestlen = requestlen; } if (replylen) { req->ir_reply = (char *)&req[1] + requestlen; req->ir_replybuflen = replylen; } } /* Allocate a new request with request and reply buffers. */ struct ipmi_request * ipmi_alloc_request(struct ipmi_device *dev, long msgid, uint8_t addr, uint8_t command, size_t requestlen, size_t replylen) { struct ipmi_request *req; req = malloc(sizeof(struct ipmi_request) + requestlen + replylen, M_IPMI, M_WAITOK | M_ZERO); ipmi_init_request(req, dev, msgid, addr, command, requestlen, replylen); return (req); } /* Free a request no longer in use. */ void ipmi_free_request(struct ipmi_request *req) { free(req, M_IPMI); } /* Store a processed request on the appropriate completion queue. */ void ipmi_complete_request(struct ipmi_softc *sc, struct ipmi_request *req) { struct ipmi_device *dev; IPMI_LOCK_ASSERT(sc); /* * Anonymous requests (from inside the driver) always have a * waiter that we awaken. */ if (req->ir_owner == NULL) wakeup(req); else { dev = req->ir_owner; TAILQ_INSERT_TAIL(&dev->ipmi_completed_requests, req, ir_link); selwakeup(&dev->ipmi_select); if (dev->ipmi_closing) wakeup(&dev->ipmi_requests); } } /* Perform an internal driver request. */ int ipmi_submit_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, int timo) { return (sc->ipmi_driver_request(sc, req, timo)); } /* * Helper routine for polled system interfaces that use * ipmi_polled_enqueue_request() to queue requests. This request * waits until there is a pending request and then returns the first * request. If the driver is shutting down, it returns NULL. */ struct ipmi_request * ipmi_dequeue_request(struct ipmi_softc *sc) { struct ipmi_request *req; IPMI_LOCK_ASSERT(sc); while (!sc->ipmi_detaching && TAILQ_EMPTY(&sc->ipmi_pending_requests) && TAILQ_EMPTY(&sc->ipmi_pending_requests_highpri)) cv_wait(&sc->ipmi_request_added, &sc->ipmi_requests_lock); if (sc->ipmi_detaching) return (NULL); req = TAILQ_FIRST(&sc->ipmi_pending_requests_highpri); if (req != NULL) TAILQ_REMOVE(&sc->ipmi_pending_requests_highpri, req, ir_link); else { req = TAILQ_FIRST(&sc->ipmi_pending_requests); TAILQ_REMOVE(&sc->ipmi_pending_requests, req, ir_link); } return (req); } /* Default implementation of ipmi_enqueue_request() for polled interfaces. */ int ipmi_polled_enqueue_request(struct ipmi_softc *sc, struct ipmi_request *req) { IPMI_LOCK_ASSERT(sc); TAILQ_INSERT_TAIL(&sc->ipmi_pending_requests, req, ir_link); cv_signal(&sc->ipmi_request_added); return (0); } int ipmi_polled_enqueue_request_highpri(struct ipmi_softc *sc, struct ipmi_request *req) { IPMI_LOCK_ASSERT(sc); TAILQ_INSERT_TAIL(&sc->ipmi_pending_requests_highpri, req, ir_link); cv_signal(&sc->ipmi_request_added); return (0); } /* * Watchdog event handler. */ static int ipmi_reset_watchdog(struct ipmi_softc *sc) { struct ipmi_request *req; int error; IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_RESET_WDOG, 0, 0); error = ipmi_submit_driver_request(sc, req, 0); if (error) { device_printf(sc->ipmi_dev, "Failed to reset watchdog\n"); } else if (req->ir_compcode == 0x80) { error = ENOENT; } else if (req->ir_compcode != 0) { device_printf(sc->ipmi_dev, "Watchdog reset returned 0x%x\n", req->ir_compcode); error = EINVAL; } return (error); } static int ipmi_set_watchdog(struct ipmi_softc *sc, unsigned int sec) { struct ipmi_request *req; int error; if (sec > 0xffff / 10) return (EINVAL); IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_SET_WDOG, 6, 0); if (sec) { req->ir_request[0] = IPMI_SET_WD_TIMER_DONT_STOP | IPMI_SET_WD_TIMER_SMS_OS; req->ir_request[1] = (wd_timer_actions & 0xff); req->ir_request[2] = min(0xff, min(wd_pretimeout_countdown, (sec + 2) / 4)); req->ir_request[3] = 0; /* Timer use */ req->ir_request[4] = (sec * 10) & 0xff; req->ir_request[5] = (sec * 10) >> 8; } else { req->ir_request[0] = IPMI_SET_WD_TIMER_SMS_OS; req->ir_request[1] = 0; req->ir_request[2] = 0; req->ir_request[3] = 0; /* Timer use */ req->ir_request[4] = 0; req->ir_request[5] = 0; } error = ipmi_submit_driver_request(sc, req, 0); if (error) { device_printf(sc->ipmi_dev, "Failed to set watchdog\n"); } else if (req->ir_compcode != 0) { device_printf(sc->ipmi_dev, "Watchdog set returned 0x%x\n", req->ir_compcode); error = EINVAL; } return (error); } static void ipmi_wd_event(void *arg, unsigned int cmd, int *error) { struct ipmi_softc *sc = arg; unsigned int timeout; int e; /* Ignore requests while disabled. */ if (!on) return; /* * To prevent infinite hangs, we don't let anyone pat or change * the watchdog when we're shutting down. (See ipmi_shutdown_event().) * However, we do want to keep patting the watchdog while we are doing * a coredump. */ if (wd_in_shutdown) { if (dumping && sc->ipmi_watchdog_active) ipmi_reset_watchdog(sc); return; } cmd &= WD_INTERVAL; if (cmd > 0 && cmd <= 63) { timeout = ((uint64_t)1 << cmd) / 1000000000; if (timeout == 0) timeout = 1; if (timeout != sc->ipmi_watchdog_active || wd_timer_actions != sc->ipmi_watchdog_actions || wd_pretimeout_countdown != sc->ipmi_watchdog_pretimeout) { e = ipmi_set_watchdog(sc, timeout); if (e == 0) { sc->ipmi_watchdog_active = timeout; sc->ipmi_watchdog_actions = wd_timer_actions; sc->ipmi_watchdog_pretimeout = wd_pretimeout_countdown; } else { (void)ipmi_set_watchdog(sc, 0); sc->ipmi_watchdog_active = 0; sc->ipmi_watchdog_actions = 0; sc->ipmi_watchdog_pretimeout = 0; } } if (sc->ipmi_watchdog_active != 0) { e = ipmi_reset_watchdog(sc); if (e == 0) { *error = 0; } else { (void)ipmi_set_watchdog(sc, 0); sc->ipmi_watchdog_active = 0; sc->ipmi_watchdog_actions = 0; sc->ipmi_watchdog_pretimeout = 0; } } } else if (atomic_readandclear_int(&sc->ipmi_watchdog_active) != 0) { sc->ipmi_watchdog_actions = 0; sc->ipmi_watchdog_pretimeout = 0; e = ipmi_set_watchdog(sc, 0); if (e != 0 && cmd == 0) *error = EOPNOTSUPP; } } static void ipmi_shutdown_event(void *arg, unsigned int cmd, int *error) { struct ipmi_softc *sc = arg; /* Ignore event if disabled. */ if (!on) return; /* * Positive wd_shutdown_countdown value will re-arm watchdog; * Zero value in wd_shutdown_countdown will disable watchdog; * Negative value in wd_shutdown_countdown will keep existing state; * * Revert to using a power cycle to ensure that the watchdog will * do something useful here. Having the watchdog send an NMI * instead is useless during shutdown, and might be ignored if an * NMI already triggered. */ wd_in_shutdown = true; if (wd_shutdown_countdown == 0) { /* disable watchdog */ ipmi_set_watchdog(sc, 0); sc->ipmi_watchdog_active = 0; } else if (wd_shutdown_countdown > 0) { /* set desired action and time, and, reset watchdog */ wd_timer_actions = IPMI_SET_WD_ACTION_POWER_CYCLE; ipmi_set_watchdog(sc, wd_shutdown_countdown); sc->ipmi_watchdog_active = wd_shutdown_countdown; ipmi_reset_watchdog(sc); } } static void ipmi_power_cycle(void *arg, int howto) { struct ipmi_softc *sc = arg; struct ipmi_request *req; /* * Ignore everything except power cycling requests */ if ((howto & RB_POWERCYCLE) == 0) return; device_printf(sc->ipmi_dev, "Power cycling using IPMI\n"); /* * Send a CHASSIS_CONTROL command to the CHASSIS device, subcommand 2 * as described in IPMI v2.0 spec section 28.3. */ IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_CHASSIS_REQUEST, 0), IPMI_CHASSIS_CONTROL, 1, 0); req->ir_request[0] = IPMI_CC_POWER_CYCLE; ipmi_submit_driver_request(sc, req, MAX_TIMEOUT); if (req->ir_error != 0 || req->ir_compcode != 0) { device_printf(sc->ipmi_dev, "Power cycling via IPMI failed code %#x %#x\n", req->ir_error, req->ir_compcode); return; } /* * BMCs are notoriously slow, give it cycle_wait seconds for the power * down leg of the power cycle. If that fails, fallback to the next * hanlder in the shutdown_final chain and/or the platform failsafe. */ DELAY(cycle_wait * 1000 * 1000); device_printf(sc->ipmi_dev, "Power cycling via IPMI timed out\n"); } static void ipmi_startup(void *arg) { struct ipmi_softc *sc = arg; struct ipmi_request *req; device_t dev; int error, i; config_intrhook_disestablish(&sc->ipmi_ich); dev = sc->ipmi_dev; /* Initialize interface-independent state. */ mtx_init(&sc->ipmi_requests_lock, "ipmi requests", NULL, MTX_DEF); mtx_init(&sc->ipmi_io_lock, "ipmi io", NULL, MTX_DEF); cv_init(&sc->ipmi_request_added, "ipmireq"); TAILQ_INIT(&sc->ipmi_pending_requests_highpri); TAILQ_INIT(&sc->ipmi_pending_requests); /* Initialize interface-dependent state. */ error = sc->ipmi_startup(sc); if (error) { device_printf(dev, "Failed to initialize interface: %d\n", error); return; } /* Send a GET_DEVICE_ID request. */ IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_DEVICE_ID, 0, 15); error = ipmi_submit_driver_request(sc, req, MAX_TIMEOUT); if (error == EWOULDBLOCK) { device_printf(dev, "Timed out waiting for GET_DEVICE_ID\n"); return; } else if (error) { device_printf(dev, "Failed GET_DEVICE_ID: %d\n", error); return; } else if (req->ir_compcode != 0) { device_printf(dev, "Bad completion code for GET_DEVICE_ID: %d\n", req->ir_compcode); return; } else if (req->ir_replylen < 5) { device_printf(dev, "Short reply for GET_DEVICE_ID: %d\n", req->ir_replylen); return; } device_printf(dev, "IPMI device rev. %d, firmware rev. %d.%d%d, " "version %d.%d, device support mask %#x\n", req->ir_reply[1] & 0x0f, req->ir_reply[2] & 0x7f, req->ir_reply[3] >> 4, req->ir_reply[3] & 0x0f, req->ir_reply[4] & 0x0f, req->ir_reply[4] >> 4, req->ir_reply[5]); sc->ipmi_dev_support = req->ir_reply[5]; IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_CLEAR_FLAGS, 1, 0); ipmi_submit_driver_request(sc, req, 0); /* XXX: Magic numbers */ if (req->ir_compcode == 0xc0) { device_printf(dev, "Clear flags is busy\n"); } if (req->ir_compcode == 0xc1) { device_printf(dev, "Clear flags illegal\n"); } for (i = 0; i < 8; i++) { IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_CHANNEL_INFO, 1, 0); req->ir_request[0] = i; error = ipmi_submit_driver_request(sc, req, 0); if (error != 0 || req->ir_compcode != 0) break; } device_printf(dev, "Number of channels %d\n", i); /* * Probe for watchdog, but only for backends which support * polled driver requests. */ if (wd_init_enable && sc->ipmi_driver_requests_polled) { IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_WDOG, 0, 0); error = ipmi_submit_driver_request(sc, req, 0); if (error == 0 && req->ir_compcode == 0x00) { device_printf(dev, "Attached watchdog\n"); /* register the watchdog event handler */ sc->ipmi_watchdog_tag = EVENTHANDLER_REGISTER( watchdog_list, ipmi_wd_event, sc, 0); sc->ipmi_shutdown_tag = EVENTHANDLER_REGISTER( shutdown_pre_sync, ipmi_shutdown_event, sc, 0); } } sc->ipmi_cdev = make_dev(&ipmi_cdevsw, device_get_unit(dev), UID_ROOT, GID_OPERATOR, 0660, "ipmi%d", device_get_unit(dev)); if (sc->ipmi_cdev == NULL) { device_printf(dev, "Failed to create cdev\n"); return; } sc->ipmi_cdev->si_drv1 = sc; /* * Set initial watchdog state. If desired, set an initial * watchdog on startup. Or, if the watchdog device is * disabled, clear any existing watchdog. */ if (on && wd_startup_countdown > 0) { if (ipmi_set_watchdog(sc, wd_startup_countdown) == 0 && ipmi_reset_watchdog(sc) == 0) { sc->ipmi_watchdog_active = wd_startup_countdown; sc->ipmi_watchdog_actions = wd_timer_actions; sc->ipmi_watchdog_pretimeout = wd_pretimeout_countdown; } else (void)ipmi_set_watchdog(sc, 0); ipmi_reset_watchdog(sc); } else if (!on) (void)ipmi_set_watchdog(sc, 0); /* * Power cycle the system off using IPMI. We use last - 2 since we don't * handle all the other kinds of reboots. We'll let others handle them. * We only try to do this if the BMC supports the Chassis device. */ if (sc->ipmi_dev_support & IPMI_ADS_CHASSIS) { device_printf(dev, "Establishing power cycle handler\n"); sc->ipmi_power_cycle_tag = EVENTHANDLER_REGISTER(shutdown_final, ipmi_power_cycle, sc, SHUTDOWN_PRI_LAST - 2); } } int ipmi_attach(device_t dev) { struct ipmi_softc *sc = device_get_softc(dev); int error; if (sc->ipmi_irq_res != NULL && sc->ipmi_intr != NULL) { error = bus_setup_intr(dev, sc->ipmi_irq_res, INTR_TYPE_MISC, NULL, sc->ipmi_intr, sc, &sc->ipmi_irq); if (error) { device_printf(dev, "can't set up interrupt\n"); return (error); } } bzero(&sc->ipmi_ich, sizeof(struct intr_config_hook)); sc->ipmi_ich.ich_func = ipmi_startup; sc->ipmi_ich.ich_arg = sc; if (config_intrhook_establish(&sc->ipmi_ich) != 0) { device_printf(dev, "can't establish configuration hook\n"); return (ENOMEM); } ipmi_attached = 1; return (0); } int ipmi_detach(device_t dev) { struct ipmi_softc *sc; sc = device_get_softc(dev); /* Fail if there are any open handles. */ IPMI_LOCK(sc); if (sc->ipmi_opened) { IPMI_UNLOCK(sc); return (EBUSY); } IPMI_UNLOCK(sc); if (sc->ipmi_cdev) destroy_dev(sc->ipmi_cdev); /* Detach from watchdog handling and turn off watchdog. */ if (sc->ipmi_shutdown_tag) EVENTHANDLER_DEREGISTER(shutdown_pre_sync, sc->ipmi_shutdown_tag); if (sc->ipmi_watchdog_tag) { EVENTHANDLER_DEREGISTER(watchdog_list, sc->ipmi_watchdog_tag); ipmi_set_watchdog(sc, 0); } /* Detach from shutdown handling for power cycle reboot */ if (sc->ipmi_power_cycle_tag) EVENTHANDLER_DEREGISTER(shutdown_final, sc->ipmi_power_cycle_tag); /* XXX: should use shutdown callout I think. */ /* If the backend uses a kthread, shut it down. */ IPMI_LOCK(sc); sc->ipmi_detaching = 1; if (sc->ipmi_kthread) { cv_broadcast(&sc->ipmi_request_added); msleep(sc->ipmi_kthread, &sc->ipmi_requests_lock, 0, "ipmi_wait", 0); } IPMI_UNLOCK(sc); if (sc->ipmi_irq) bus_teardown_intr(dev, sc->ipmi_irq_res, sc->ipmi_irq); ipmi_release_resources(dev); mtx_destroy(&sc->ipmi_io_lock); mtx_destroy(&sc->ipmi_requests_lock); return (0); } void ipmi_release_resources(device_t dev) { struct ipmi_softc *sc; int i; sc = device_get_softc(dev); if (sc->ipmi_irq) bus_teardown_intr(dev, sc->ipmi_irq_res, sc->ipmi_irq); if (sc->ipmi_irq_res) bus_release_resource(dev, SYS_RES_IRQ, sc->ipmi_irq_rid, sc->ipmi_irq_res); for (i = 0; i < MAX_RES; i++) if (sc->ipmi_io_res[i]) bus_release_resource(dev, sc->ipmi_io_type, sc->ipmi_io_rid + i, sc->ipmi_io_res[i]); } /* XXX: Why? */ static void ipmi_unload(void *arg) { device_t * devs; int count; int i; if (devclass_get_devices(devclass_find("ipmi"), &devs, &count) != 0) return; for (i = 0; i < count; i++) device_delete_child(device_get_parent(devs[i]), devs[i]); free(devs, M_TEMP); } SYSUNINIT(ipmi_unload, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipmi_unload, NULL); #ifdef IMPI_DEBUG static void dump_buf(u_char *data, int len) { char buf[20]; char line[1024]; char temp[30]; int count = 0; int i=0; printf("Address %p len %d\n", data, len); if (len > 256) len = 256; line[0] = '\000'; for (; len > 0; len--, data++) { sprintf(temp, "%02x ", *data); strcat(line, temp); if (*data >= ' ' && *data <= '~') buf[count] = *data; else if (*data >= 'A' && *data <= 'Z') buf[count] = *data; else buf[count] = '.'; if (++count == 16) { buf[count] = '\000'; count = 0; printf(" %3x %s %s\n", i, line, buf); i+=16; line[0] = '\000'; } } buf[count] = '\000'; for (; count != 16; count++) { strcat(line, " "); } printf(" %3x %s %s\n", i, line, buf); } #endif