freebsd-dev/sys/dev/iwm/if_iwm_time_event.c
Kyle Evans df34d80aa7 iwm - Clear Time Event active state, when receiving End Notification.
* This hopefully avoids some firmware panics, I was occasionally seeing,
when iwm disconnects upon losing signal to an access point at some point.

* This is synchronizing the if_iwm_time_event.c file a bit more from the
corresponding Linux iwlwifi/mvm/time-event.c.

Taken-From:     Linux iwlwifi

Submitted by:	Augustin Cavalier <waddlesplash@gmail.com> (Haiku)
Obtained from:	DragonFlyBSD (e8cb71584a6a72232c13151d60e57f7f229220eb)
2019-01-24 03:47:47 +00:00

430 lines
14 KiB
C

/* $OpenBSD: if_iwm.c,v 1.39 2015/03/23 00:35:19 jsg Exp $ */
/*
* Copyright (c) 2014 genua mbh <info@genua.de>
* 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 <ilw@linux.intel.com>
* 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 <damien.bergamini@free.fr>
*
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_wlan.h"
#include "opt_iwm.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/endian.h>
#include <sys/firmware.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/linker.h>
#include <machine/bus.h>
#include <machine/endian.h>
#include <machine/resource.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <net/bpf.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_regdomain.h>
#include <net80211/ieee80211_ratectl.h>
#include <net80211/ieee80211_radiotap.h>
#include <dev/iwm/if_iwmreg.h>
#include <dev/iwm/if_iwmvar.h>
#include <dev/iwm/if_iwm_debug.h>
#include <dev/iwm/if_iwm_util.h>
#include <dev/iwm/if_iwm_notif_wait.h>
#include <dev/iwm/if_iwm_pcie_trans.h>
#include <dev/iwm/if_iwm_time_event.h>
#define TU_TO_HZ(tu) (((uint64_t)(tu) * 1024 * hz) / 1000000)
static void
iwm_mvm_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_mvm_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)) {
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);
}
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_mvm_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_mvm_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_mvm_te_handle_notif(sc, notif);
}
static int
iwm_mvm_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_mvm_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_mvm_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_mvm_time_event_response, /*te_data*/NULL);
ret = iwm_mvm_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_mvm_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_mvm_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_mvm_te_notif, /*te_data*/NULL);
/* If TE was sent OK - wait for the notification that started */
if (iwm_mvm_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_mvm_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_mvm_send_cmd_pdu(sc, IWM_TIME_EVENT_CMD, 0, sizeof(time_cmd),
&time_cmd) == 0)
iwm_mvm_te_clear_data(sc);
DELAY(100);
}