221 lines
6.8 KiB
C
221 lines
6.8 KiB
C
/*-
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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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******************************************************************************
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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 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2015 Intel Deutschland GmbH
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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 <linuxwifi@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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* BSD LICENSE
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*
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* Copyright(c) 2005 - 2014 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/lock.h>
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#include <sys/queue.h>
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#include <dev/iwm/if_iwm_notif_wait.h>
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#define IWM_WAIT_LOCK_INIT(_n, _s) \
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mtx_init(&(_n)->lk_mtx, (_s), "iwm wait_notif", MTX_DEF);
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#define IWM_WAIT_LOCK(_n) mtx_lock(&(_n)->lk_mtx)
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#define IWM_WAIT_UNLOCK(_n) mtx_unlock(&(_n)->lk_mtx)
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#define IWM_WAIT_LOCK_DESTROY(_n) mtx_destroy(&(_n)->lk_mtx)
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struct iwm_notif_wait_data {
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struct mtx lk_mtx;
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char lk_buf[32];
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STAILQ_HEAD(, iwm_notification_wait) list;
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struct iwm_softc *sc;
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};
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struct iwm_notif_wait_data *
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iwm_notification_wait_init(struct iwm_softc *sc)
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{
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struct iwm_notif_wait_data *data;
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data = malloc(sizeof(*data), M_DEVBUF, M_NOWAIT | M_ZERO);
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if (data != NULL) {
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snprintf(data->lk_buf, 32, "iwm wait_notif");
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IWM_WAIT_LOCK_INIT(data, data->lk_buf);
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STAILQ_INIT(&data->list);
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data->sc = sc;
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}
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return data;
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}
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void
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iwm_notification_wait_free(struct iwm_notif_wait_data *notif_data)
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{
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KASSERT(STAILQ_EMPTY(¬if_data->list), ("notif list isn't empty"));
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IWM_WAIT_LOCK_DESTROY(notif_data);
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free(notif_data, M_DEVBUF);
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}
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/* XXX Get rid of separate cmd argument, like in iwlwifi's code */
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void
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iwm_notification_wait_notify(struct iwm_notif_wait_data *notif_data,
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uint16_t cmd, struct iwm_rx_packet *pkt)
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{
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struct iwm_notification_wait *wait_entry;
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IWM_WAIT_LOCK(notif_data);
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STAILQ_FOREACH(wait_entry, ¬if_data->list, entry) {
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int found = FALSE;
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int i;
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/*
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* If it already finished (triggered) or has been
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* aborted then don't evaluate it again to avoid races,
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* Otherwise the function could be called again even
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* though it returned true before
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*/
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if (wait_entry->triggered || wait_entry->aborted)
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continue;
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for (i = 0; i < wait_entry->n_cmds; i++) {
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if (cmd == wait_entry->cmds[i]) {
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found = TRUE;
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break;
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}
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}
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if (!found)
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continue;
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if (!wait_entry->fn ||
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wait_entry->fn(notif_data->sc, pkt, wait_entry->fn_data)) {
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wait_entry->triggered = 1;
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wakeup(wait_entry);
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}
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}
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IWM_WAIT_UNLOCK(notif_data);
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}
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void
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iwm_abort_notification_waits(struct iwm_notif_wait_data *notif_data)
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{
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struct iwm_notification_wait *wait_entry;
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IWM_WAIT_LOCK(notif_data);
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STAILQ_FOREACH(wait_entry, ¬if_data->list, entry) {
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wait_entry->aborted = 1;
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wakeup(wait_entry);
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}
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IWM_WAIT_UNLOCK(notif_data);
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}
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void
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iwm_init_notification_wait(struct iwm_notif_wait_data *notif_data,
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struct iwm_notification_wait *wait_entry, const uint16_t *cmds, int n_cmds,
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int (*fn)(struct iwm_softc *sc, struct iwm_rx_packet *pkt, void *data),
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void *fn_data)
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{
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KASSERT(n_cmds <= IWM_MAX_NOTIF_CMDS,
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("n_cmds %d is too large", n_cmds));
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wait_entry->fn = fn;
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wait_entry->fn_data = fn_data;
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wait_entry->n_cmds = n_cmds;
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memcpy(wait_entry->cmds, cmds, n_cmds * sizeof(uint16_t));
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wait_entry->triggered = 0;
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wait_entry->aborted = 0;
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IWM_WAIT_LOCK(notif_data);
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STAILQ_INSERT_TAIL(¬if_data->list, wait_entry, entry);
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IWM_WAIT_UNLOCK(notif_data);
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}
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int
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iwm_wait_notification(struct iwm_notif_wait_data *notif_data,
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struct iwm_notification_wait *wait_entry, int timeout)
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{
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int ret = 0;
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IWM_WAIT_LOCK(notif_data);
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if (!wait_entry->triggered && !wait_entry->aborted) {
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ret = msleep(wait_entry, ¬if_data->lk_mtx, 0, "iwm_notif",
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timeout);
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}
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STAILQ_REMOVE(¬if_data->list, wait_entry, iwm_notification_wait,
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entry);
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IWM_WAIT_UNLOCK(notif_data);
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return ret;
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}
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void
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iwm_remove_notification(struct iwm_notif_wait_data *notif_data,
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struct iwm_notification_wait *wait_entry)
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{
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IWM_WAIT_LOCK(notif_data);
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STAILQ_REMOVE(¬if_data->list, wait_entry, iwm_notification_wait,
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entry);
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IWM_WAIT_UNLOCK(notif_data);
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}
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