/* $OpenBSD: if_iwm.c,v 1.39 2015/03/23 00:35:19 jsg Exp $ */ /* * Copyright (c) 2014 genua mbh * Copyright (c) 2014 Fixup Software Ltd. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /*- * Based on BSD-licensed source modules in the Linux iwlwifi driver, * which were used as the reference documentation for this implementation. * * Driver version we are currently based off of is * Linux 3.14.3 (tag id a2df521e42b1d9a23f620ac79dbfe8655a8391dd) * *********************************************************************** * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, * USA * * The full GNU General Public License is included in this distribution * in the file called COPYING. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * * BSD LICENSE * * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 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. * * Neither the name Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT * OWNER 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. */ /*- * Copyright (c) 2007-2010 Damien Bergamini * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include "opt_wlan.h" #include "opt_iwm.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define TU_TO_HZ(tu) (((uint64_t)(tu) * 1024 * hz) / 1000000) static void iwm_te_clear_data(struct iwm_softc *sc) { sc->sc_time_event_uid = 0; sc->sc_time_event_duration = 0; sc->sc_time_event_end_ticks = 0; sc->sc_flags &= ~IWM_FLAG_TE_ACTIVE; } /* * Handles a FW notification for an event that is known to the driver. * * @mvm: the mvm component * @te_data: the time event data * @notif: the notification data corresponding the time event data. */ static void iwm_te_handle_notif(struct iwm_softc *sc, struct iwm_time_event_notif *notif) { IWM_DPRINTF(sc, IWM_DEBUG_TE, "Handle time event notif - UID = 0x%x action %d\n", le32toh(notif->unique_id), le32toh(notif->action)); if (!le32toh(notif->status)) { #ifdef IWM_DEBUG const char *msg; if (notif->action & htole32(IWM_TE_V2_NOTIF_HOST_EVENT_START)) msg = "Time Event start notification failure"; else msg = "Time Event end notification failure"; IWM_DPRINTF(sc, IWM_DEBUG_TE, "%s\n", msg); #endif } if (le32toh(notif->action) & IWM_TE_V2_NOTIF_HOST_EVENT_END) { IWM_DPRINTF(sc, IWM_DEBUG_TE, "TE ended - current time %d, estimated end %d\n", ticks, sc->sc_time_event_end_ticks); iwm_te_clear_data(sc); } else if (le32toh(notif->action) & IWM_TE_V2_NOTIF_HOST_EVENT_START) { sc->sc_time_event_end_ticks = ticks + TU_TO_HZ(sc->sc_time_event_duration); } else { device_printf(sc->sc_dev, "Got TE with unknown action\n"); } } /* * The Rx handler for time event notifications */ void iwm_rx_time_event_notif(struct iwm_softc *sc, struct iwm_rx_packet *pkt) { struct iwm_time_event_notif *notif = (void *)pkt->data; IWM_DPRINTF(sc, IWM_DEBUG_TE, "Time event notification - UID = 0x%x action %d\n", le32toh(notif->unique_id), le32toh(notif->action)); iwm_te_handle_notif(sc, notif); } static int iwm_te_notif(struct iwm_softc *sc, struct iwm_rx_packet *pkt, void *data) { struct iwm_time_event_notif *resp; int resp_len = iwm_rx_packet_payload_len(pkt); if (pkt->hdr.code != IWM_TIME_EVENT_NOTIFICATION || resp_len != sizeof(*resp)) { IWM_DPRINTF(sc, IWM_DEBUG_TE, "Invalid TIME_EVENT_NOTIFICATION response\n"); return 1; } resp = (void *)pkt->data; /* te_data->uid is already set in the TIME_EVENT_CMD response */ if (le32toh(resp->unique_id) != sc->sc_time_event_uid) return false; IWM_DPRINTF(sc, IWM_DEBUG_TE, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", sc->sc_time_event_uid); if (!resp->status) { IWM_DPRINTF(sc, IWM_DEBUG_TE, "TIME_EVENT_NOTIFICATION received but not executed\n"); } return 1; } static int iwm_time_event_response(struct iwm_softc *sc, struct iwm_rx_packet *pkt, void *data) { struct iwm_time_event_resp *resp; int resp_len = iwm_rx_packet_payload_len(pkt); if (pkt->hdr.code != IWM_TIME_EVENT_CMD || resp_len != sizeof(*resp)) { IWM_DPRINTF(sc, IWM_DEBUG_TE, "Invalid TIME_EVENT_CMD response\n"); return 1; } resp = (void *)pkt->data; /* we should never get a response to another TIME_EVENT_CMD here */ if (le32toh(resp->id) != IWM_TE_BSS_STA_AGGRESSIVE_ASSOC) { IWM_DPRINTF(sc, IWM_DEBUG_TE, "Got TIME_EVENT_CMD response with wrong id: %d\n", le32toh(resp->id)); return 0; } sc->sc_time_event_uid = le32toh(resp->unique_id); IWM_DPRINTF(sc, IWM_DEBUG_TE, "TIME_EVENT_CMD response - UID = 0x%x\n", sc->sc_time_event_uid); return 1; } /* XXX Use the te_data function argument properly, like in iwlwifi's code. */ static int iwm_time_event_send_add(struct iwm_softc *sc, struct iwm_vap *ivp, void *te_data, struct iwm_time_event_cmd *te_cmd) { static const uint16_t time_event_response[] = { IWM_TIME_EVENT_CMD }; struct iwm_notification_wait wait_time_event; int ret; IWM_DPRINTF(sc, IWM_DEBUG_TE, "Add new TE, duration %d TU\n", le32toh(te_cmd->duration)); sc->sc_time_event_duration = le32toh(te_cmd->duration); /* * Use a notification wait, which really just processes the * command response and doesn't wait for anything, in order * to be able to process the response and get the UID inside * the RX path. Using CMD_WANT_SKB doesn't work because it * stores the buffer and then wakes up this thread, by which * time another notification (that the time event started) * might already be processed unsuccessfully. */ iwm_init_notification_wait(sc->sc_notif_wait, &wait_time_event, time_event_response, nitems(time_event_response), iwm_time_event_response, /*te_data*/NULL); ret = iwm_send_cmd_pdu(sc, IWM_TIME_EVENT_CMD, 0, sizeof(*te_cmd), te_cmd); if (ret) { IWM_DPRINTF(sc, IWM_DEBUG_TE, "%s: Couldn't send IWM_TIME_EVENT_CMD: %d\n", __func__, ret); iwm_remove_notification(sc->sc_notif_wait, &wait_time_event); return ret; } /* No need to wait for anything, so just pass 1 (0 isn't valid) */ IWM_UNLOCK(sc); ret = iwm_wait_notification(sc->sc_notif_wait, &wait_time_event, 1); IWM_LOCK(sc); /* should never fail */ if (ret) { IWM_DPRINTF(sc, IWM_DEBUG_TE, "%s: Failed to get response for IWM_TIME_EVENT_CMD: %d\n", __func__, ret); } return ret; } void iwm_protect_session(struct iwm_softc *sc, struct iwm_vap *ivp, uint32_t duration, uint32_t max_delay, boolean_t wait_for_notif) { const uint16_t te_notif_response[] = { IWM_TIME_EVENT_NOTIFICATION }; struct iwm_notification_wait wait_te_notif; struct iwm_time_event_cmd time_cmd = {}; /* Do nothing if a time event is already scheduled. */ if (sc->sc_flags & IWM_FLAG_TE_ACTIVE) return; time_cmd.action = htole32(IWM_FW_CTXT_ACTION_ADD); time_cmd.id_and_color = htole32(IWM_FW_CMD_ID_AND_COLOR(ivp->id, ivp->color)); time_cmd.id = htole32(IWM_TE_BSS_STA_AGGRESSIVE_ASSOC); time_cmd.apply_time = htole32(0); time_cmd.max_frags = IWM_TE_V2_FRAG_NONE; time_cmd.max_delay = htole32(max_delay); /* TODO: why do we need to interval = bi if it is not periodic? */ time_cmd.interval = htole32(1); time_cmd.duration = htole32(duration); time_cmd.repeat = 1; time_cmd.policy = htole16(IWM_TE_V2_NOTIF_HOST_EVENT_START | IWM_TE_V2_NOTIF_HOST_EVENT_END | IWM_T2_V2_START_IMMEDIATELY); if (!wait_for_notif) { iwm_time_event_send_add(sc, ivp, /*te_data*/NULL, &time_cmd); DELAY(100); sc->sc_flags |= IWM_FLAG_TE_ACTIVE; return; } /* * Create notification_wait for the TIME_EVENT_NOTIFICATION to use * right after we send the time event */ iwm_init_notification_wait(sc->sc_notif_wait, &wait_te_notif, te_notif_response, nitems(te_notif_response), iwm_te_notif, /*te_data*/NULL); /* If TE was sent OK - wait for the notification that started */ if (iwm_time_event_send_add(sc, ivp, /*te_data*/NULL, &time_cmd)) { IWM_DPRINTF(sc, IWM_DEBUG_TE, "%s: Failed to add TE to protect session\n", __func__); iwm_remove_notification(sc->sc_notif_wait, &wait_te_notif); } else { sc->sc_flags |= IWM_FLAG_TE_ACTIVE; IWM_UNLOCK(sc); if (iwm_wait_notification(sc->sc_notif_wait, &wait_te_notif, TU_TO_HZ(max_delay))) { IWM_DPRINTF(sc, IWM_DEBUG_TE, "%s: Failed to protect session until TE\n", __func__); } IWM_LOCK(sc); } } void iwm_stop_session_protection(struct iwm_softc *sc, struct iwm_vap *ivp) { struct iwm_time_event_cmd time_cmd = {}; /* Do nothing if the time event has already ended. */ if ((sc->sc_flags & IWM_FLAG_TE_ACTIVE) == 0) return; time_cmd.id = htole32(sc->sc_time_event_uid); time_cmd.action = htole32(IWM_FW_CTXT_ACTION_REMOVE); time_cmd.id_and_color = htole32(IWM_FW_CMD_ID_AND_COLOR(ivp->id, ivp->color)); IWM_DPRINTF(sc, IWM_DEBUG_TE, "%s: Removing TE 0x%x\n", __func__, le32toh(time_cmd.id)); if (iwm_send_cmd_pdu(sc, IWM_TIME_EVENT_CMD, 0, sizeof(time_cmd), &time_cmd) == 0) iwm_te_clear_data(sc); DELAY(100); }