/*- * 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. * * $FreeBSD: head/sys/dev/ipmi/ipmi.c 257421 2013-10-31 05:13:53Z glebius $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef LOCAL_MODULE #include #include #else #include #include #endif #ifdef IPMB static int ipmi_ipmb_checksum(u_char, int); static int ipmi_ipmb_send_message(device_t, u_char, u_char, u_char, u_char, u_char, int) #endif static d_ioctl_t ipmi_ioctl; static d_kqfilter_t ipmi_kqfilter; static d_open_t ipmi_open; static void ipmi_dtor(void *arg); static void ipmi_filter_detach(struct knote *); static int ipmi_filter_read(struct knote *, long); int ipmi_attached = 0; static int on = 1; static SYSCTL_NODE(_hw, OID_AUTO, ipmi, CTLFLAG_RD, 0, "IPMI driver parameters"); SYSCTL_INT(_hw_ipmi, OID_AUTO, on, CTLFLAG_RW, &on, 0, ""); static struct dev_ops ipmi_ops = { { "ipmi", 0, D_MPSAFE }, .d_open = ipmi_open, .d_ioctl = ipmi_ioctl, .d_kqfilter = ipmi_kqfilter, }; static int ipmi_watchdog_sysctl_enable(SYSCTL_HANDLER_ARGS); static int ipmi_watchdog_sysctl_period(SYSCTL_HANDLER_ARGS); static MALLOC_DEFINE(M_IPMI, "ipmi", "ipmi"); static int ipmi_open(struct dev_open_args *ap) { struct file *fp = ap->a_fp; cdev_t cdev = ap->a_head.a_dev; struct ipmi_device *dev; struct ipmi_softc *sc; int error; if (!on) return (ENOENT); /* Initialize the per file descriptor data. */ dev = kmalloc(sizeof(struct ipmi_device), M_IPMI, M_WAITOK | M_ZERO); error = devfs_set_cdevpriv(fp, dev, ipmi_dtor); if (error) { kfree(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 struct filterops ipmi_filterops = { FILTEROP_ISFD | FILTEROP_MPSAFE, NULL, ipmi_filter_detach, ipmi_filter_read }; static int ipmi_kqfilter(struct dev_kqfilter_args *ap) { cdev_t cdev = ap->a_head.a_dev; struct file *fp = ap->a_fp; struct knote *kn = ap->a_kn; struct ipmi_softc *sc = cdev->si_drv1; struct ipmi_device *dev; struct klist *klist; ap->a_result = 0; switch(kn->kn_filter) { case EVFILT_READ: if (devfs_get_cdevpriv(fp, (void **)&dev)) return EOPNOTSUPP; kn->kn_fop = &ipmi_filterops; kn->kn_hook = (caddr_t)dev; break; default: ap->a_result = EOPNOTSUPP; return (0); } klist = &sc->ipmi_kq.ki_note; knote_insert(klist, kn); return (0); } static void ipmi_filter_detach(struct knote *kn) { struct ipmi_device *dev = (struct ipmi_device *)kn->kn_hook; struct ipmi_softc *sc = dev->ipmi_softc; struct klist *klist; klist = &sc->ipmi_kq.ki_note; knote_remove(klist, kn); } static int ipmi_filter_read(struct knote *kn, long hint) { struct ipmi_device *dev = (struct ipmi_device *)kn->kn_hook; struct ipmi_softc *sc = dev->ipmi_softc; int ret = 0; IPMI_LOCK(sc); if (!TAILQ_EMPTY(&dev->ipmi_completed_requests)) ret = 1; if (dev->ipmi_requests == 0) kn->kn_flags |= EV_ERROR; IPMI_UNLOCK(sc); return (ret); } 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_MUTABLE(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) { lksleep(&dev->ipmi_requests, &sc->ipmi_lock, 0, "ipmidrain", 0); ipmi_purge_completed_requests(dev); } } sc->ipmi_opened--; IPMI_UNLOCK(sc); /* Cleanup. */ kfree(dev, M_IPMI); } #ifdef IPMB static int ipmi_ipmb_checksum(u_char *data, int len) { u_char sum = 0; for (; len; len--) { sum += *data++; } return (-sum); } /* XXX: Needs work */ static int ipmi_ipmb_send_message(device_t dev, u_char channel, u_char netfn, u_char command, u_char seq, u_char *data, int data_len) { struct ipmi_softc *sc = device_get_softc(dev); struct ipmi_request *req; u_char slave_addr = 0x52; int error; req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_SEND_MSG, data_len + 8, 0); req->ir_request[0] = channel; req->ir_request[1] = slave_addr; req->ir_request[2] = IPMI_ADDR(netfn, 0); req->ir_request[3] = ipmi_ipmb_checksum(&req->ir_request[1], 2); req->ir_request[4] = sc->ipmi_address; req->ir_request[5] = IPMI_ADDR(seq, sc->ipmi_lun); req->ir_request[6] = command; bcopy(data, &req->ir_request[7], data_len); temp[data_len + 7] = ipmi_ipmb_checksum(&req->ir_request[4], data_len + 3); ipmi_submit_driver_request(sc, req); error = req->ir_error; ipmi_free_request(req); return (error); } static int ipmi_handle_attn(struct ipmi_softc *sc) { struct ipmi_request *req; int error; device_printf(sc->ipmi_dev, "BMC has a message\n"); req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_MSG_FLAGS, 0, 1); ipmi_submit_driver_request(sc, req); if (req->ir_error == 0 && req->ir_compcode == 0) { if (req->ir_reply[0] & IPMI_MSG_BUFFER_FULL) { device_printf(sc->ipmi_dev, "message buffer full"); } if (req->ir_reply[0] & IPMI_WDT_PRE_TIMEOUT) { device_printf(sc->ipmi_dev, "watchdog about to go off"); } if (req->ir_reply[0] & IPMI_MSG_AVAILABLE) { ipmi_free_request(req); req = ipmi_alloc_driver_request( IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_MSG, 0, 16); device_printf(sc->ipmi_dev, "throw out message "); dump_buf(temp, 16); } } error = req->ir_error; ipmi_free_request(req); return (error); } #endif #ifdef IPMICTL_SEND_COMMAND_32 #define PTRIN(p) ((void *)(uintptr_t)(p)) #define PTROUT(p) ((uintptr_t)(p)) #endif static int ipmi_ioctl(struct dev_ioctl_args *ap) { struct file *fp = ap->a_fp; cdev_t cdev = ap->a_head.a_dev; u_long cmd = ap->a_cmd; caddr_t data = ap->a_data; 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(fp, (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: /* * XXX: Need to add proper handling of this. */ error = copyin(req->addr, &addr, sizeof(addr)); if (error) return (error); IPMI_LOCK(sc); /* clear out old stuff in queue of stuff done */ /* XXX: This seems odd. */ while ((kreq = TAILQ_FIRST(&dev->ipmi_completed_requests))) { TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, ir_link); dev->ipmi_requests--; ipmi_free_request(kreq); } IPMI_UNLOCK(sc); kreq = ipmi_alloc_request(dev, req->msgid, IPMI_ADDR(req->msg.netfn, 0), 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; #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); } addr.channel = IPMI_BMC_CHANNEL; /* XXX */ recv->recv_type = IPMI_RESPONSE_RECV_TYPE; recv->msgid = kreq->ir_msgid; recv->msg.netfn = IPMI_REPLY_ADDR(kreq->ir_addr) >> 2; recv->msg.cmd = kreq->ir_command; error = kreq->ir_error; if (error) { TAILQ_REMOVE(&dev->ipmi_completed_requests, kreq, ir_link); dev->ipmi_requests--; IPMI_UNLOCK(sc); ipmi_free_request(kreq); return (error); } 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. */ /* 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 = kmalloc(sizeof(struct ipmi_request) + requestlen + replylen, M_IPMI, M_WAITOK | M_ZERO); 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; } return (req); } /* Free a request no longer in use. */ void ipmi_free_request(struct ipmi_request *req) { kfree(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); KNOTE(&sc->ipmi_kq.ki_note, 0); if (dev->ipmi_closing) wakeup(&dev->ipmi_requests); } } /* Enqueue an internal driver request and wait until it is completed. */ int ipmi_submit_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, int timo) { int error; IPMI_LOCK(sc); error = sc->ipmi_enqueue_request(sc, req); if (error == 0) error = lksleep(req, &sc->ipmi_lock, 0, "ipmireq", timo); if (error == 0) error = req->ir_error; IPMI_UNLOCK(sc); return (error); } /* * 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)) cv_wait(&sc->ipmi_request_added, &sc->ipmi_lock); if (sc->ipmi_detaching) return (NULL); 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); } /* * Watchdog event handler. */ static int ipmi_set_watchdog(struct ipmi_softc *sc, unsigned int sec) { struct ipmi_request *req; int error; if (sec > 0xffff / 10) return (EINVAL); req = ipmi_alloc_driver_request(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] = IPMI_SET_WD_ACTION_RESET; req->ir_request[2] = 0; 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 (sec) { ipmi_free_request(req); req = ipmi_alloc_driver_request(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"); } ipmi_free_request(req); return (error); /* dump_watchdog(sc); */ } static void ipmi_watchdog(void *arg) { struct ipmi_softc *sc = (struct ipmi_softc *)arg; int e; if(sc->ipmi_wdog_period) { e = ipmi_set_watchdog(sc, sc->ipmi_wdog_period + 1); if (e == 0) sc->ipmi_watchdog_active = 1; else ipmi_set_watchdog(sc, 0); callout_reset(&sc->ipmi_watchdog, sc->ipmi_wdog_period * hz, &ipmi_watchdog, (void *)sc); } } 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. */ lockinit(&sc->ipmi_lock, device_get_nameunit(dev), 0, LK_CANRECURSE); cv_init(&sc->ipmi_request_added, "ipmireq"); 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. */ req = ipmi_alloc_driver_request(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"); ipmi_free_request(req); return; } else if (error) { device_printf(dev, "Failed GET_DEVICE_ID: %d\n", error); ipmi_free_request(req); return; } else if (req->ir_compcode != 0) { device_printf(dev, "Bad completion code for GET_DEVICE_ID: %d\n", req->ir_compcode); ipmi_free_request(req); return; } else if (req->ir_replylen < 5) { device_printf(dev, "Short reply for GET_DEVICE_ID: %d\n", req->ir_replylen); ipmi_free_request(req); return; } device_printf(dev, "IPMI device rev. %d, firmware rev. %d.%d%d, " "version %d.%d\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); ipmi_free_request(req); req = ipmi_alloc_driver_request(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"); } ipmi_free_request(req); for (i = 0; i < 8; i++) { req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_CHANNEL_INFO, 1, 0); req->ir_request[0] = i; ipmi_submit_driver_request(sc, req, 0); if (req->ir_compcode != 0) { ipmi_free_request(req); break; } ipmi_free_request(req); } device_printf(dev, "Number of channels %d\n", i); /* probe for watchdog */ req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_WDOG, 0, 0); ipmi_submit_driver_request(sc, req, 0); if (req->ir_compcode == 0x00) { struct sysctl_ctx_list *ctx; struct sysctl_oid *tree; struct sysctl_oid_list *child; device_printf(dev, "Attached watchdog\n"); /* register the watchdog event handler */ /* XXX profmakx: our wdog driver holds a spinlock while running the watchdog function, but since the ipmi watchdog function sleeps, this doesn't work. Hack something with a callout */ callout_init(&sc->ipmi_watchdog); sc->ipmi_wdog_enable = 0; sc->ipmi_wdog_period = 30; ctx = device_get_sysctl_ctx(dev); tree = device_get_sysctl_tree(dev); child = SYSCTL_CHILDREN(tree); SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "watchdog_enable", CTLTYPE_INT | CTLFLAG_RW, sc, 0, ipmi_watchdog_sysctl_enable, "I", "ipmi watchdog enable"); SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "watchdog_period", CTLTYPE_INT | CTLFLAG_RW, sc, 0, ipmi_watchdog_sysctl_period, "I", "ipmi watchdog period"); } ipmi_free_request(req); sc->ipmi_cdev = make_dev(&ipmi_ops, 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; } 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, 0, sc->ipmi_intr, sc, &sc->ipmi_irq, NULL); 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; sc->ipmi_ich.ich_desc = "ipmi"; 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. */ callout_stop_sync(&sc->ipmi_watchdog); ipmi_set_watchdog(sc, 0); /* 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); lksleep(sc->ipmi_kthread, &sc->ipmi_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); lockuninit(&sc->ipmi_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]); } devclass_t ipmi_devclass; /* XXX: Why? */ static void ipmi_unload(void *arg) { device_t * devs; int count; int i; if (devclass_get_devices(ipmi_devclass, &devs, &count) != 0) return; for (i = 0; i < count; i++) device_delete_child(device_get_parent(devs[i]), devs[i]); kfree(devs, M_TEMP); } SYSUNINIT(ipmi_unload, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipmi_unload, NULL); static int ipmi_watchdog_sysctl_enable(SYSCTL_HANDLER_ARGS) { struct ipmi_softc *sc; int enable; int error; sc = oidp->oid_arg1; IPMI_LOCK(sc); enable = sc->ipmi_wdog_enable; IPMI_UNLOCK(sc); error = sysctl_handle_int(oidp, &enable, 0, req); if(error || req->newptr == NULL) return error; IPMI_LOCK(sc); sc->ipmi_wdog_enable = enable; IPMI_UNLOCK(sc); if (sc->ipmi_wdog_enable==0) { callout_stop(&sc->ipmi_watchdog); ipmi_set_watchdog(sc, 0); } else { callout_reset(&sc->ipmi_watchdog, sc->ipmi_wdog_period * hz, &ipmi_watchdog, (void *)sc); ipmi_set_watchdog(sc, sc->ipmi_wdog_period + 1); } return 0; } static int ipmi_watchdog_sysctl_period(SYSCTL_HANDLER_ARGS) { struct ipmi_softc *sc; int error; int period; sc = oidp->oid_arg1; IPMI_LOCK(sc); period = sc->ipmi_wdog_period; IPMI_UNLOCK(sc); error = sysctl_handle_int(oidp, &period, 30, req); if (error || req->newptr == NULL) return error; IPMI_LOCK(sc); sc->ipmi_wdog_period = period; IPMI_UNLOCK(sc); return 0; } #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