269 lines
6.3 KiB
C
269 lines
6.3 KiB
C
/*-
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* Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
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* Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
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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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__FBSDID("$FreeBSD$");
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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_beacon.h>
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#include <dev/rtwn/if_rtwn_debug.h>
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#include <dev/rtwn/if_rtwn_tx.h>
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#include <dev/rtwn/rtl8192c/r92c_reg.h>
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static void
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rtwn_reset_beacon_valid(struct rtwn_softc *sc, int id)
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{
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KASSERT (id == 0 || id == 1, ("wrong port id %d\n", id));
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/* XXX cannot be cleared on RTL8188CE */
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rtwn_setbits_1_shift(sc, sc->bcn_status_reg[id],
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R92C_TDECTRL_BCN_VALID, 0, 2);
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RTWN_DPRINTF(sc, RTWN_DEBUG_BEACON,
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"%s: 'beacon valid' bit for vap %d was unset\n",
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__func__, id);
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}
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static int
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rtwn_check_beacon_valid(struct rtwn_softc *sc, int id)
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{
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uint16_t reg;
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int ntries;
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if (id == RTWN_VAP_ID_INVALID)
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return (0);
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reg = sc->bcn_status_reg[id];
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for (ntries = 0; ntries < 10; ntries++) {
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if (rtwn_read_4(sc, reg) & R92C_TDECTRL_BCN_VALID) {
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RTWN_DPRINTF(sc, RTWN_DEBUG_BEACON,
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"%s: beacon for vap %d was recognized\n",
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__func__, id);
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break;
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}
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rtwn_delay(sc, sc->bcn_check_interval);
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}
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if (ntries == 10)
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return (ETIMEDOUT);
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return (0);
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}
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void
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rtwn_switch_bcnq(struct rtwn_softc *sc, int id)
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{
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if (sc->cur_bcnq_id != id) {
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/* Wait until any previous transmit completes. */
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(void) rtwn_check_beacon_valid(sc, sc->cur_bcnq_id);
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/* Change current port. */
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rtwn_beacon_select(sc, id);
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sc->cur_bcnq_id = id;
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}
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/* Reset 'beacon valid' bit. */
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rtwn_reset_beacon_valid(sc, id);
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}
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int
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rtwn_setup_beacon(struct rtwn_softc *sc, struct ieee80211_node *ni)
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{
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struct ieee80211vap *vap = ni->ni_vap;
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struct rtwn_vap *uvp = RTWN_VAP(vap);
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struct mbuf *m;
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RTWN_ASSERT_LOCKED(sc);
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if (ni->ni_chan == IEEE80211_CHAN_ANYC)
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return (EINVAL);
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m = ieee80211_beacon_alloc(ni);
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if (m == NULL) {
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device_printf(sc->sc_dev,
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"%s: could not allocate beacon frame\n", __func__);
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return (ENOMEM);
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}
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if (uvp->bcn_mbuf != NULL) {
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rtwn_beacon_unload(sc, uvp->id);
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m_freem(uvp->bcn_mbuf);
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}
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uvp->bcn_mbuf = m;
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rtwn_beacon_set_rate(sc, &uvp->bcn_desc.txd[0],
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IEEE80211_IS_CHAN_5GHZ(ni->ni_chan));
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return (rtwn_tx_beacon_check(sc, uvp));
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}
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/*
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* Push a beacon frame into the chip. Beacon will
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* be repeated by the chip every R92C_BCN_INTERVAL.
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*/
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static int
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rtwn_tx_beacon(struct rtwn_softc *sc, struct rtwn_vap *uvp)
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{
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int error;
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RTWN_ASSERT_LOCKED(sc);
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RTWN_DPRINTF(sc, RTWN_DEBUG_BEACON,
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"%s: sending beacon for vap %d\n", __func__, uvp->id);
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error = rtwn_tx_start(sc, NULL, uvp->bcn_mbuf, &uvp->bcn_desc.txd[0],
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IEEE80211_FC0_TYPE_MGT, uvp->id);
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return (error);
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}
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void
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rtwn_update_beacon(struct ieee80211vap *vap, int item)
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{
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struct ieee80211com *ic = vap->iv_ic;
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struct rtwn_softc *sc = ic->ic_softc;
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struct rtwn_vap *uvp = RTWN_VAP(vap);
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struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off;
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struct ieee80211_node *ni = vap->iv_bss;
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int mcast = 0;
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RTWN_LOCK(sc);
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if (uvp->bcn_mbuf == NULL) {
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uvp->bcn_mbuf = ieee80211_beacon_alloc(ni);
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if (uvp->bcn_mbuf == NULL) {
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device_printf(sc->sc_dev,
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"%s: could not allocate beacon frame\n", __func__);
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RTWN_UNLOCK(sc);
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return;
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}
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}
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RTWN_DPRINTF(sc, RTWN_DEBUG_BEACON,
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"%s: vap id %d, iv_csa_count %d, ic_csa_count %d, item %d\n",
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__func__, uvp->id, vap->iv_csa_count, ic->ic_csa_count, item);
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switch (item) {
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case IEEE80211_BEACON_CSA:
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if (vap->iv_csa_count != ic->ic_csa_count) {
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/*
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* XXX two APs with different beacon intervals
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* are not handled properly.
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*/
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/* XXX check TBTT? */
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taskqueue_enqueue_timeout(taskqueue_thread,
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&uvp->tx_beacon_csa,
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msecs_to_ticks(ni->ni_intval));
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}
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break;
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case IEEE80211_BEACON_TIM:
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mcast = 1; /* XXX */
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break;
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default:
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break;
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}
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setbit(bo->bo_flags, item);
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rtwn_beacon_update_begin(sc, vap);
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RTWN_UNLOCK(sc);
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ieee80211_beacon_update(ni, uvp->bcn_mbuf, mcast);
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/* XXX clear manually */
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clrbit(bo->bo_flags, IEEE80211_BEACON_CSA);
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RTWN_LOCK(sc);
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rtwn_tx_beacon(sc, uvp);
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rtwn_beacon_update_end(sc, vap);
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RTWN_UNLOCK(sc);
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}
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void
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rtwn_tx_beacon_csa(void *arg, int npending __unused)
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{
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struct ieee80211vap *vap = arg;
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struct ieee80211com *ic = vap->iv_ic;
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struct rtwn_softc *sc = ic->ic_softc;
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struct rtwn_vap *rvp = RTWN_VAP(vap);
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KASSERT (rvp->id == 0 || rvp->id == 1,
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("wrong port id %d\n", rvp->id));
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IEEE80211_LOCK(ic);
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if (ic->ic_flags & IEEE80211_F_CSAPENDING) {
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RTWN_DPRINTF(sc, RTWN_DEBUG_BEACON,
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"%s: vap id %d, iv_csa_count %d, ic_csa_count %d\n",
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__func__, rvp->id, vap->iv_csa_count, ic->ic_csa_count);
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rtwn_update_beacon(vap, IEEE80211_BEACON_CSA);
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}
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IEEE80211_UNLOCK(ic);
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(void) rvp;
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}
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int
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rtwn_tx_beacon_check(struct rtwn_softc *sc, struct rtwn_vap *uvp)
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{
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int ntries, error;
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for (ntries = 0; ntries < 5; ntries++) {
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rtwn_reset_beacon_valid(sc, uvp->id);
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error = rtwn_tx_beacon(sc, uvp);
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if (error != 0)
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continue;
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error = rtwn_check_beacon_valid(sc, uvp->id);
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if (error == 0)
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break;
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}
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if (ntries == 5) {
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device_printf(sc->sc_dev,
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"%s: cannot push beacon into chip, error %d!\n",
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__func__, error);
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return (error);
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}
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return (0);
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}
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