Index: sys/dev/ipmi/ipmi.c =================================================================== --- sys/dev/ipmi/ipmi.c +++ sys/dev/ipmi/ipmi.c @@ -49,6 +49,23 @@ #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) \ + 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)); \ + bzero((req), sizeof(struct ipmi_request)); \ + IPMI_INIT_DRIVER_REQUEST((req), (addr), (cmd), (reqlen), \ + (replylen)) + #ifdef IPMB static int ipmi_ipmb_checksum(u_char, int); static int ipmi_ipmb_send_message(device_t, u_char, u_char, u_char, @@ -181,8 +198,8 @@ */ dev->ipmi_closing = 1; while (dev->ipmi_requests > 0) { - msleep(&dev->ipmi_requests, &sc->ipmi_lock, PWAIT, - "ipmidrain", 0); + msleep(&dev->ipmi_requests, &sc->ipmi_requests_lock, + PWAIT, "ipmidrain", 0); ipmi_purge_completed_requests(dev); } } @@ -215,7 +232,7 @@ u_char slave_addr = 0x52; int error; - req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), + IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_SEND_MSG, data_len + 8, 0); req->ir_request[0] = channel; req->ir_request[1] = slave_addr; @@ -231,7 +248,6 @@ ipmi_submit_driver_request(sc, req); error = req->ir_error; - ipmi_free_request(req); return (error); } @@ -243,7 +259,7 @@ int error; device_printf(sc->ipmi_dev, "BMC has a message\n"); - req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), + IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_MSG_FLAGS, 0, 1); ipmi_submit_driver_request(sc, req); @@ -257,9 +273,7 @@ "watchdog about to go off"); } if (req->ir_reply[0] & IPMI_MSG_AVAILABLE) { - ipmi_free_request(req); - - req = ipmi_alloc_driver_request( + IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_MSG, 0, 16); @@ -268,7 +282,6 @@ } } error = req->ir_error; - ipmi_free_request(req); return (error); } @@ -478,15 +491,11 @@ * 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) +static __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) { - struct ipmi_request *req; - req = malloc(sizeof(struct ipmi_request) + requestlen + replylen, - M_IPMI, M_WAITOK | M_ZERO); req->ir_owner = dev; req->ir_msgid = msgid; req->ir_addr = addr; @@ -499,6 +508,18 @@ 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); } @@ -533,21 +554,13 @@ } } -/* Enqueue an internal driver request and wait until it is completed. */ +/* Perform an internal driver request. */ 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 = msleep(req, &sc->ipmi_lock, 0, "ipmireq", timo); - if (error == 0) - error = req->ir_error; - IPMI_UNLOCK(sc); - return (error); + return (sc->ipmi_driver_request(sc, req, timo)); } /* @@ -564,7 +577,7 @@ IPMI_LOCK_ASSERT(sc); while (!sc->ipmi_detaching && TAILQ_EMPTY(&sc->ipmi_pending_requests)) - cv_wait(&sc->ipmi_request_added, &sc->ipmi_lock); + cv_wait(&sc->ipmi_request_added, &sc->ipmi_requests_lock); if (sc->ipmi_detaching) return (NULL); @@ -598,7 +611,7 @@ if (sec > 0xffff / 10) return (EINVAL); - req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), + IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_SET_WDOG, 6, 0); if (sec) { @@ -622,9 +635,7 @@ 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_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_RESET_WDOG, 0, 0); error = ipmi_submit_driver_request(sc, req, 0); @@ -633,7 +644,6 @@ "Failed to reset watchdog\n"); } - ipmi_free_request(req); return (error); /* dump_watchdog(sc); @@ -680,7 +690,8 @@ dev = sc->ipmi_dev; /* Initialize interface-independent state. */ - mtx_init(&sc->ipmi_lock, device_get_nameunit(dev), "ipmi", MTX_DEF); + 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); @@ -693,28 +704,24 @@ } /* Send a GET_DEVICE_ID request. */ - req = ipmi_alloc_driver_request(IPMI_ADDR(IPMI_APP_REQUEST, 0), + 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"); - 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; } @@ -724,9 +731,7 @@ 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_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_CLEAR_FLAGS, 1, 0); ipmi_submit_driver_request(sc, req, 0); @@ -738,25 +743,21 @@ 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_INIT_DRIVER_REQUEST(req, 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); + if (req->ir_compcode != 0) 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_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0), IPMI_GET_WDOG, 0, 0); ipmi_submit_driver_request(sc, req, 0); @@ -767,7 +768,6 @@ sc->ipmi_watchdog_tag = EVENTHANDLER_REGISTER(watchdog_list, ipmi_wd_event, sc, 0); } - ipmi_free_request(req); sc->ipmi_cdev = make_dev(&ipmi_cdevsw, device_get_unit(dev), UID_ROOT, GID_OPERATOR, 0660, "ipmi%d", device_get_unit(dev)); @@ -834,14 +834,16 @@ sc->ipmi_detaching = 1; if (sc->ipmi_kthread) { cv_broadcast(&sc->ipmi_request_added); - msleep(sc->ipmi_kthread, &sc->ipmi_lock, 0, "ipmi_wait", 0); + 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_lock); + mtx_destroy(&sc->ipmi_io_lock); + mtx_destroy(&sc->ipmi_requests_lock); return (0); } Index: sys/dev/ipmi/ipmi_kcs.c =================================================================== --- sys/dev/ipmi/ipmi_kcs.c +++ sys/dev/ipmi/ipmi_kcs.c @@ -308,6 +308,8 @@ u_char *cp, data; int i, state; + IPMI_IO_LOCK(sc); + /* Send the request. */ if (!kcs_start_write(sc)) { device_printf(sc->ipmi_dev, "KCS: Failed to start write\n"); @@ -431,6 +433,7 @@ } i++; } + IPMI_IO_UNLOCK(sc); req->ir_replylen = i; #ifdef KCS_DEBUG device_printf(sc->ipmi_dev, "KCS: READ finished (%d bytes)\n", i); @@ -444,6 +447,7 @@ return (1); fail: kcs_error(sc); + IPMI_IO_UNLOCK(sc); return (0); } @@ -479,6 +483,21 @@ device_get_nameunit(sc->ipmi_dev))); } +static int +kcs_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, int timo) +{ + int i, ok; + + ok = 0; + for (i = 0; i < 3 && !ok; i++) + ok = kcs_polled_request(sc, req); + if (ok) + req->ir_error = 0; + else + req->ir_error = EIO; + return (req->ir_error); +} + int ipmi_kcs_attach(struct ipmi_softc *sc) { @@ -487,6 +506,7 @@ /* Setup function pointers. */ sc->ipmi_startup = kcs_startup; sc->ipmi_enqueue_request = ipmi_polled_enqueue_request; + sc->ipmi_driver_request = kcs_driver_request; /* See if we can talk to the controller. */ status = INB(sc, KCS_CTL_STS); Index: sys/dev/ipmi/ipmi_smic.c =================================================================== --- sys/dev/ipmi/ipmi_smic.c +++ sys/dev/ipmi/ipmi_smic.c @@ -364,8 +364,11 @@ while ((req = ipmi_dequeue_request(sc)) != NULL) { IPMI_UNLOCK(sc); ok = 0; - for (i = 0; i < 3 && !ok; i++) + for (i = 0; i < 3 && !ok; i++) { + IPMI_IO_LOCK(sc); ok = smic_polled_request(sc, req); + IPMI_IO_UNLOCK(sc); + } if (ok) req->ir_error = 0; else @@ -385,6 +388,24 @@ "%s: smic", device_get_nameunit(sc->ipmi_dev))); } +static int +smic_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, int timo) +{ + int i, ok; + + ok = 0; + for (i = 0; i < 3 && !ok; i++) { + IPMI_IO_LOCK(sc); + ok = smic_polled_request(sc, req); + IPMI_IO_UNLOCK(sc); + } + if (ok) + req->ir_error = 0; + else + req->ir_error = EIO; + return (req->ir_error); +} + int ipmi_smic_attach(struct ipmi_softc *sc) { @@ -393,6 +414,7 @@ /* Setup function pointers. */ sc->ipmi_startup = smic_startup; sc->ipmi_enqueue_request = ipmi_polled_enqueue_request; + sc->ipmi_driver_request = smic_driver_request; /* See if we can talk to the controller. */ flags = INB(sc, SMIC_FLAGS); Index: sys/dev/ipmi/ipmi_ssif.c =================================================================== --- sys/dev/ipmi/ipmi_ssif.c +++ sys/dev/ipmi/ipmi_ssif.c @@ -359,6 +359,22 @@ "%s: ssif", device_get_nameunit(sc->ipmi_dev))); } +static int +ssif_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, int timo) +{ + int error; + + IPMI_LOCK(sc); + error = ipmi_polled_enqueue_request(sc, req); + if (error == 0) + error = msleep(req, &sc->ipmi_requests_lock, 0, "ipmireq", + timo); + if (error == 0) + error = req->ir_error; + IPMI_UNLOCK(sc); + return (error); +} + int ipmi_ssif_attach(struct ipmi_softc *sc, device_t smbus, int smbus_address) { @@ -370,6 +386,7 @@ /* Setup function pointers. */ sc->ipmi_startup = ssif_startup; sc->ipmi_enqueue_request = ipmi_polled_enqueue_request; + sc->ipmi_driver_request = ssif_driver_request; return (0); } Index: sys/dev/ipmi/ipmivars.h =================================================================== --- sys/dev/ipmi/ipmivars.h +++ sys/dev/ipmi/ipmivars.h @@ -95,6 +95,7 @@ } _iface; int ipmi_io_rid; int ipmi_io_type; + struct mtx ipmi_io_lock; struct resource *ipmi_io_res[MAX_RES]; int ipmi_io_spacing; int ipmi_irq_rid; @@ -107,12 +108,13 @@ eventhandler_tag ipmi_watchdog_tag; int ipmi_watchdog_active; struct intr_config_hook ipmi_ich; - struct mtx ipmi_lock; + struct mtx ipmi_requests_lock; struct cv ipmi_request_added; struct proc *ipmi_kthread; driver_intr_t *ipmi_intr; int (*ipmi_startup)(struct ipmi_softc *); int (*ipmi_enqueue_request)(struct ipmi_softc *, struct ipmi_request *); + int (*ipmi_driver_request)(struct ipmi_softc *, struct ipmi_request *, int); }; #define ipmi_ssif_smbus_address _iface.ssif.smbus_address @@ -183,12 +185,13 @@ #define IPMI_ADDR(netfn, lun) ((netfn) << 2 | (lun)) #define IPMI_REPLY_ADDR(addr) ((addr) + 0x4) -#define IPMI_LOCK(sc) mtx_lock(&(sc)->ipmi_lock) -#define IPMI_UNLOCK(sc) mtx_unlock(&(sc)->ipmi_lock) -#define IPMI_LOCK_ASSERT(sc) mtx_assert(&(sc)->ipmi_lock, MA_OWNED) +#define IPMI_LOCK(sc) mtx_lock(&(sc)->ipmi_requests_lock) +#define IPMI_UNLOCK(sc) mtx_unlock(&(sc)->ipmi_requests_lock) +#define IPMI_LOCK_ASSERT(sc) mtx_assert(&(sc)->ipmi_requests_lock, MA_OWNED) -#define ipmi_alloc_driver_request(addr, cmd, reqlen, replylen) \ - ipmi_alloc_request(NULL, 0, (addr), (cmd), (reqlen), (replylen)) +#define IPMI_IO_LOCK(sc) mtx_lock(&(sc)->ipmi_io_lock) +#define IPMI_IO_UNLOCK(sc) mtx_unlock(&(sc)->ipmi_io_lock) +#define IPMI_IO_LOCK_ASSERT(sc) mtx_assert(&(sc)->ipmi_io_lock, MA_OWNED) #if __FreeBSD_version < 601105 #define bus_read_1(r, o) \