mirror of
https://github.com/freebsd/freebsd-src
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120 lines
2.8 KiB
C
120 lines
2.8 KiB
C
/*-
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* Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
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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 <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/mbuf.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/queue.h>
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#include <sys/taskqueue.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <net/if.h>
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#include <net/ethernet.h>
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#include <net/if_media.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_radiotap.h>
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#include <dev/rtwn/if_rtwnvar.h>
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#include <dev/rtwn/if_rtwn_task.h>
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static void
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rtwn_cmdq_cb(void *arg, int pending)
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{
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struct rtwn_softc *sc = arg;
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struct rtwn_cmdq *item;
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/*
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* Device must be powered on (via rtwn_power_on())
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* before any command may be sent.
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*/
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RTWN_LOCK(sc);
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if (!(sc->sc_flags & RTWN_RUNNING)) {
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RTWN_UNLOCK(sc);
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return;
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}
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RTWN_CMDQ_LOCK(sc);
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while (sc->cmdq[sc->cmdq_first].func != NULL) {
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item = &sc->cmdq[sc->cmdq_first];
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sc->cmdq_first = (sc->cmdq_first + 1) % RTWN_CMDQ_SIZE;
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RTWN_CMDQ_UNLOCK(sc);
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item->func(sc, &item->data);
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RTWN_CMDQ_LOCK(sc);
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memset(item, 0, sizeof (*item));
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}
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RTWN_CMDQ_UNLOCK(sc);
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RTWN_UNLOCK(sc);
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}
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void
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rtwn_cmdq_init(struct rtwn_softc *sc)
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{
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RTWN_CMDQ_LOCK_INIT(sc);
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TASK_INIT(&sc->cmdq_task, 0, rtwn_cmdq_cb, sc);
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}
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void
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rtwn_cmdq_destroy(struct rtwn_softc *sc)
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{
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if (RTWN_CMDQ_LOCK_INITIALIZED(sc))
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RTWN_CMDQ_LOCK_DESTROY(sc);
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}
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int
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rtwn_cmd_sleepable(struct rtwn_softc *sc, const void *ptr, size_t len,
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CMD_FUNC_PROTO)
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{
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struct ieee80211com *ic = &sc->sc_ic;
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KASSERT(len <= sizeof(union sec_param), ("buffer overflow"));
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RTWN_CMDQ_LOCK(sc);
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if (sc->sc_detached) {
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RTWN_CMDQ_UNLOCK(sc);
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return (ESHUTDOWN);
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}
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if (sc->cmdq[sc->cmdq_last].func != NULL) {
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device_printf(sc->sc_dev, "%s: cmdq overflow\n", __func__);
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RTWN_CMDQ_UNLOCK(sc);
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return (EAGAIN);
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}
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if (ptr != NULL)
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memcpy(&sc->cmdq[sc->cmdq_last].data, ptr, len);
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sc->cmdq[sc->cmdq_last].func = func;
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sc->cmdq_last = (sc->cmdq_last + 1) % RTWN_CMDQ_SIZE;
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RTWN_CMDQ_UNLOCK(sc);
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ieee80211_runtask(ic, &sc->cmdq_task);
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return (0);
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}
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