430 lines
14 KiB
C
430 lines
14 KiB
C
/* $OpenBSD: if_iwm.c,v 1.39 2015/03/23 00:35:19 jsg Exp $ */
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/*
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* Copyright (c) 2014 genua mbh <info@genua.de>
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* Copyright (c) 2014 Fixup Software Ltd.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*-
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* Based on BSD-licensed source modules in the Linux iwlwifi driver,
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* which were used as the reference documentation for this implementation.
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*
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* Driver version we are currently based off of is
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* Linux 3.14.3 (tag id a2df521e42b1d9a23f620ac79dbfe8655a8391dd)
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*
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***********************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2007 - 2013 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called COPYING.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*
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* BSD LICENSE
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*
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* Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 2007-2010 Damien Bergamini <damien.bergamini@free.fr>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/cdefs.h>
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#include "opt_wlan.h"
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#include "opt_iwm.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/endian.h>
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#include <sys/firmware.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mutex.h>
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#include <sys/module.h>
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#include <sys/proc.h>
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#include <sys/rman.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/linker.h>
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#include <machine/bus.h>
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#include <machine/endian.h>
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#include <machine/resource.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <net/bpf.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_types.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/if_ether.h>
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#include <netinet/ip.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_regdomain.h>
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#include <net80211/ieee80211_ratectl.h>
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#include <net80211/ieee80211_radiotap.h>
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#include <dev/iwm/if_iwmreg.h>
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#include <dev/iwm/if_iwmvar.h>
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#include <dev/iwm/if_iwm_debug.h>
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#include <dev/iwm/if_iwm_util.h>
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#include <dev/iwm/if_iwm_notif_wait.h>
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#include <dev/iwm/if_iwm_pcie_trans.h>
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#include <dev/iwm/if_iwm_time_event.h>
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#define TU_TO_HZ(tu) (((uint64_t)(tu) * 1024 * hz) / 1000000)
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static void
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iwm_te_clear_data(struct iwm_softc *sc)
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{
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sc->sc_time_event_uid = 0;
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sc->sc_time_event_duration = 0;
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sc->sc_time_event_end_ticks = 0;
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sc->sc_flags &= ~IWM_FLAG_TE_ACTIVE;
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}
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/*
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* Handles a FW notification for an event that is known to the driver.
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*
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* @mvm: the mvm component
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* @te_data: the time event data
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* @notif: the notification data corresponding the time event data.
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*/
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static void
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iwm_te_handle_notif(struct iwm_softc *sc,
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struct iwm_time_event_notif *notif)
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{
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"Handle time event notif - UID = 0x%x action %d\n",
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le32toh(notif->unique_id),
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le32toh(notif->action));
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if (!le32toh(notif->status)) {
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#ifdef IWM_DEBUG
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const char *msg;
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if (notif->action & htole32(IWM_TE_V2_NOTIF_HOST_EVENT_START))
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msg = "Time Event start notification failure";
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else
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msg = "Time Event end notification failure";
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IWM_DPRINTF(sc, IWM_DEBUG_TE, "%s\n", msg);
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#endif
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}
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if (le32toh(notif->action) & IWM_TE_V2_NOTIF_HOST_EVENT_END) {
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"TE ended - current time %d, estimated end %d\n",
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ticks, sc->sc_time_event_end_ticks);
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iwm_te_clear_data(sc);
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} else if (le32toh(notif->action) & IWM_TE_V2_NOTIF_HOST_EVENT_START) {
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sc->sc_time_event_end_ticks =
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ticks + TU_TO_HZ(sc->sc_time_event_duration);
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} else {
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device_printf(sc->sc_dev, "Got TE with unknown action\n");
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}
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}
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/*
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* The Rx handler for time event notifications
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*/
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void
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iwm_rx_time_event_notif(struct iwm_softc *sc, struct iwm_rx_packet *pkt)
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{
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struct iwm_time_event_notif *notif = (void *)pkt->data;
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"Time event notification - UID = 0x%x action %d\n",
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le32toh(notif->unique_id),
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le32toh(notif->action));
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iwm_te_handle_notif(sc, notif);
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}
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static int
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iwm_te_notif(struct iwm_softc *sc, struct iwm_rx_packet *pkt,
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void *data)
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{
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struct iwm_time_event_notif *resp;
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int resp_len = iwm_rx_packet_payload_len(pkt);
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if (pkt->hdr.code != IWM_TIME_EVENT_NOTIFICATION ||
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resp_len != sizeof(*resp)) {
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"Invalid TIME_EVENT_NOTIFICATION response\n");
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return 1;
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}
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resp = (void *)pkt->data;
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/* te_data->uid is already set in the TIME_EVENT_CMD response */
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if (le32toh(resp->unique_id) != sc->sc_time_event_uid)
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return false;
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"TIME_EVENT_NOTIFICATION response - UID = 0x%x\n",
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sc->sc_time_event_uid);
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if (!resp->status) {
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"TIME_EVENT_NOTIFICATION received but not executed\n");
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}
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return 1;
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}
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static int
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iwm_time_event_response(struct iwm_softc *sc, struct iwm_rx_packet *pkt,
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void *data)
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{
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struct iwm_time_event_resp *resp;
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int resp_len = iwm_rx_packet_payload_len(pkt);
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if (pkt->hdr.code != IWM_TIME_EVENT_CMD ||
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resp_len != sizeof(*resp)) {
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"Invalid TIME_EVENT_CMD response\n");
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return 1;
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}
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resp = (void *)pkt->data;
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/* we should never get a response to another TIME_EVENT_CMD here */
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if (le32toh(resp->id) != IWM_TE_BSS_STA_AGGRESSIVE_ASSOC) {
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"Got TIME_EVENT_CMD response with wrong id: %d\n",
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le32toh(resp->id));
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return 0;
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}
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sc->sc_time_event_uid = le32toh(resp->unique_id);
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"TIME_EVENT_CMD response - UID = 0x%x\n", sc->sc_time_event_uid);
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return 1;
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}
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/* XXX Use the te_data function argument properly, like in iwlwifi's code. */
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static int
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iwm_time_event_send_add(struct iwm_softc *sc, struct iwm_vap *ivp,
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void *te_data, struct iwm_time_event_cmd *te_cmd)
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{
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static const uint16_t time_event_response[] = { IWM_TIME_EVENT_CMD };
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struct iwm_notification_wait wait_time_event;
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int ret;
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"Add new TE, duration %d TU\n", le32toh(te_cmd->duration));
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sc->sc_time_event_duration = le32toh(te_cmd->duration);
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/*
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* Use a notification wait, which really just processes the
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* command response and doesn't wait for anything, in order
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* to be able to process the response and get the UID inside
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* the RX path. Using CMD_WANT_SKB doesn't work because it
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* stores the buffer and then wakes up this thread, by which
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* time another notification (that the time event started)
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* might already be processed unsuccessfully.
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*/
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iwm_init_notification_wait(sc->sc_notif_wait, &wait_time_event,
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time_event_response,
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nitems(time_event_response),
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iwm_time_event_response, /*te_data*/NULL);
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ret = iwm_send_cmd_pdu(sc, IWM_TIME_EVENT_CMD, 0, sizeof(*te_cmd),
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te_cmd);
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if (ret) {
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"%s: Couldn't send IWM_TIME_EVENT_CMD: %d\n",
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__func__, ret);
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iwm_remove_notification(sc->sc_notif_wait, &wait_time_event);
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return ret;
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}
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/* No need to wait for anything, so just pass 1 (0 isn't valid) */
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IWM_UNLOCK(sc);
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ret = iwm_wait_notification(sc->sc_notif_wait, &wait_time_event, 1);
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IWM_LOCK(sc);
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/* should never fail */
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if (ret) {
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"%s: Failed to get response for IWM_TIME_EVENT_CMD: %d\n",
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__func__, ret);
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}
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return ret;
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}
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void
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iwm_protect_session(struct iwm_softc *sc, struct iwm_vap *ivp,
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uint32_t duration, uint32_t max_delay, boolean_t wait_for_notif)
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{
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const uint16_t te_notif_response[] = { IWM_TIME_EVENT_NOTIFICATION };
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struct iwm_notification_wait wait_te_notif;
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struct iwm_time_event_cmd time_cmd = {};
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/* Do nothing if a time event is already scheduled. */
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if (sc->sc_flags & IWM_FLAG_TE_ACTIVE)
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return;
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time_cmd.action = htole32(IWM_FW_CTXT_ACTION_ADD);
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time_cmd.id_and_color =
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htole32(IWM_FW_CMD_ID_AND_COLOR(ivp->id, ivp->color));
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time_cmd.id = htole32(IWM_TE_BSS_STA_AGGRESSIVE_ASSOC);
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time_cmd.apply_time = htole32(0);
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time_cmd.max_frags = IWM_TE_V2_FRAG_NONE;
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time_cmd.max_delay = htole32(max_delay);
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/* TODO: why do we need to interval = bi if it is not periodic? */
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time_cmd.interval = htole32(1);
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time_cmd.duration = htole32(duration);
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time_cmd.repeat = 1;
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time_cmd.policy
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= htole16(IWM_TE_V2_NOTIF_HOST_EVENT_START |
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IWM_TE_V2_NOTIF_HOST_EVENT_END |
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IWM_T2_V2_START_IMMEDIATELY);
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if (!wait_for_notif) {
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iwm_time_event_send_add(sc, ivp, /*te_data*/NULL, &time_cmd);
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DELAY(100);
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sc->sc_flags |= IWM_FLAG_TE_ACTIVE;
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return;
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}
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/*
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* Create notification_wait for the TIME_EVENT_NOTIFICATION to use
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* right after we send the time event
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*/
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iwm_init_notification_wait(sc->sc_notif_wait, &wait_te_notif,
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te_notif_response, nitems(te_notif_response),
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iwm_te_notif, /*te_data*/NULL);
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/* If TE was sent OK - wait for the notification that started */
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if (iwm_time_event_send_add(sc, ivp, /*te_data*/NULL, &time_cmd)) {
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"%s: Failed to add TE to protect session\n", __func__);
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iwm_remove_notification(sc->sc_notif_wait, &wait_te_notif);
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} else {
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sc->sc_flags |= IWM_FLAG_TE_ACTIVE;
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IWM_UNLOCK(sc);
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if (iwm_wait_notification(sc->sc_notif_wait, &wait_te_notif,
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TU_TO_HZ(max_delay))) {
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"%s: Failed to protect session until TE\n",
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__func__);
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}
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IWM_LOCK(sc);
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}
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}
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void
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iwm_stop_session_protection(struct iwm_softc *sc, struct iwm_vap *ivp)
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{
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struct iwm_time_event_cmd time_cmd = {};
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/* Do nothing if the time event has already ended. */
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if ((sc->sc_flags & IWM_FLAG_TE_ACTIVE) == 0)
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return;
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time_cmd.id = htole32(sc->sc_time_event_uid);
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time_cmd.action = htole32(IWM_FW_CTXT_ACTION_REMOVE);
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time_cmd.id_and_color =
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htole32(IWM_FW_CMD_ID_AND_COLOR(ivp->id, ivp->color));
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IWM_DPRINTF(sc, IWM_DEBUG_TE,
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"%s: Removing TE 0x%x\n", __func__, le32toh(time_cmd.id));
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if (iwm_send_cmd_pdu(sc, IWM_TIME_EVENT_CMD, 0, sizeof(time_cmd),
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&time_cmd) == 0)
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iwm_te_clear_data(sc);
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DELAY(100);
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}
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