diff options
Diffstat (limited to 'freebsd/sys/dev/rtwn/if_rtwn_beacon.c')
| -rw-r--r-- | freebsd/sys/dev/rtwn/if_rtwn_beacon.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/freebsd/sys/dev/rtwn/if_rtwn_beacon.c b/freebsd/sys/dev/rtwn/if_rtwn_beacon.c new file mode 100644 index 00000000..a6a49f76 --- /dev/null +++ b/freebsd/sys/dev/rtwn/if_rtwn_beacon.c @@ -0,0 +1,271 @@ +#include <machine/rtems-bsd-kernel-space.h> + +/*- + * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr> + * Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org> + * Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org> + * + * 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 <rtems/bsd/sys/param.h> +#include <rtems/bsd/sys/lock.h> +#include <sys/mutex.h> +#include <sys/mbuf.h> +#include <sys/kernel.h> +#include <sys/socket.h> +#include <sys/systm.h> +#include <sys/malloc.h> +#include <sys/queue.h> +#include <sys/taskqueue.h> +#include <sys/bus.h> +#include <sys/endian.h> + +#include <net/if.h> +#include <net/ethernet.h> +#include <net/if_media.h> + +#include <net80211/ieee80211_var.h> +#include <net80211/ieee80211_radiotap.h> + +#include <dev/rtwn/if_rtwnvar.h> + +#include <dev/rtwn/if_rtwn_beacon.h> +#include <dev/rtwn/if_rtwn_debug.h> +#include <dev/rtwn/if_rtwn_tx.h> + +#include <dev/rtwn/rtl8192c/r92c_reg.h> + + +static void +rtwn_reset_beacon_valid(struct rtwn_softc *sc, int id) +{ + + KASSERT (id == 0 || id == 1, ("wrong port id %d\n", id)); + + /* XXX cannot be cleared on RTL8188CE */ + rtwn_setbits_1_shift(sc, sc->bcn_status_reg[id], + R92C_TDECTRL_BCN_VALID, 0, 2); + + RTWN_DPRINTF(sc, RTWN_DEBUG_BEACON, + "%s: 'beacon valid' bit for vap %d was unset\n", + __func__, id); +} + +static int +rtwn_check_beacon_valid(struct rtwn_softc *sc, int id) +{ + uint16_t reg; + int ntries; + + if (id == RTWN_VAP_ID_INVALID) + return (0); + + reg = sc->bcn_status_reg[id]; + for (ntries = 0; ntries < 10; ntries++) { + if (rtwn_read_4(sc, reg) & R92C_TDECTRL_BCN_VALID) { + RTWN_DPRINTF(sc, RTWN_DEBUG_BEACON, + "%s: beacon for vap %d was recognized\n", + __func__, id); + break; + } + rtwn_delay(sc, sc->bcn_check_interval); + } + if (ntries == 10) + return (ETIMEDOUT); + + return (0); +} + +void +rtwn_switch_bcnq(struct rtwn_softc *sc, int id) +{ + + if (sc->cur_bcnq_id != id) { + /* Wait until any previous transmit completes. */ + (void) rtwn_check_beacon_valid(sc, sc->cur_bcnq_id); + + /* Change current port. */ + rtwn_beacon_select(sc, id); + sc->cur_bcnq_id = id; + } + + /* Reset 'beacon valid' bit. */ + rtwn_reset_beacon_valid(sc, id); +} + +int +rtwn_setup_beacon(struct rtwn_softc *sc, struct ieee80211_node *ni) +{ + struct ieee80211vap *vap = ni->ni_vap; + struct rtwn_vap *uvp = RTWN_VAP(vap); + struct mbuf *m; + + RTWN_ASSERT_LOCKED(sc); + + if (ni->ni_chan == IEEE80211_CHAN_ANYC) + return (EINVAL); + + m = ieee80211_beacon_alloc(ni); + if (m == NULL) { + device_printf(sc->sc_dev, + "%s: could not allocate beacon frame\n", __func__); + return (ENOMEM); + } + + if (uvp->bcn_mbuf != NULL) { + rtwn_beacon_unload(sc, uvp->id); + m_freem(uvp->bcn_mbuf); + } + + uvp->bcn_mbuf = m; + + rtwn_beacon_set_rate(sc, &uvp->bcn_desc.txd[0], + IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)); + + return (rtwn_tx_beacon_check(sc, uvp)); +} + +/* + * Push a beacon frame into the chip. Beacon will + * be repeated by the chip every R92C_BCN_INTERVAL. + */ +static int +rtwn_tx_beacon(struct rtwn_softc *sc, struct rtwn_vap *uvp) +{ + int error; + + RTWN_ASSERT_LOCKED(sc); + + RTWN_DPRINTF(sc, RTWN_DEBUG_BEACON, + "%s: sending beacon for vap %d\n", __func__, uvp->id); + + error = rtwn_tx_start(sc, NULL, uvp->bcn_mbuf, &uvp->bcn_desc.txd[0], + IEEE80211_FC0_TYPE_MGT, uvp->id); + + return (error); +} + +void +rtwn_update_beacon(struct ieee80211vap *vap, int item) +{ + struct ieee80211com *ic = vap->iv_ic; + struct rtwn_softc *sc = ic->ic_softc; + struct rtwn_vap *uvp = RTWN_VAP(vap); + struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; + struct ieee80211_node *ni = vap->iv_bss; + int mcast = 0; + + RTWN_LOCK(sc); + if (uvp->bcn_mbuf == NULL) { + uvp->bcn_mbuf = ieee80211_beacon_alloc(ni); + if (uvp->bcn_mbuf == NULL) { + device_printf(sc->sc_dev, + "%s: could not allocate beacon frame\n", __func__); + RTWN_UNLOCK(sc); + return; + } + } + + RTWN_DPRINTF(sc, RTWN_DEBUG_BEACON, + "%s: vap id %d, iv_csa_count %d, ic_csa_count %d, item %d\n", + __func__, uvp->id, vap->iv_csa_count, ic->ic_csa_count, item); + + switch (item) { + case IEEE80211_BEACON_CSA: + if (vap->iv_csa_count != ic->ic_csa_count) { + /* + * XXX two APs with different beacon intervals + * are not handled properly. + */ + /* XXX check TBTT? */ + taskqueue_enqueue_timeout(taskqueue_thread, + &uvp->tx_beacon_csa, + msecs_to_ticks(ni->ni_intval)); + } + break; + case IEEE80211_BEACON_TIM: + mcast = 1; /* XXX */ + break; + default: + break; + } + + setbit(bo->bo_flags, item); + + rtwn_beacon_update_begin(sc, vap); + RTWN_UNLOCK(sc); + + ieee80211_beacon_update(ni, uvp->bcn_mbuf, mcast); + + /* XXX clear manually */ + clrbit(bo->bo_flags, IEEE80211_BEACON_CSA); + + RTWN_LOCK(sc); + rtwn_tx_beacon(sc, uvp); + rtwn_beacon_update_end(sc, vap); + RTWN_UNLOCK(sc); +} + +void +rtwn_tx_beacon_csa(void *arg, int npending __unused) +{ + struct ieee80211vap *vap = arg; + struct ieee80211com *ic = vap->iv_ic; + struct rtwn_softc *sc = ic->ic_softc; + struct rtwn_vap *rvp = RTWN_VAP(vap); + + KASSERT (rvp->id == 0 || rvp->id == 1, + ("wrong port id %d\n", rvp->id)); + + IEEE80211_LOCK(ic); + if (ic->ic_flags & IEEE80211_F_CSAPENDING) { + RTWN_DPRINTF(sc, RTWN_DEBUG_BEACON, + "%s: vap id %d, iv_csa_count %d, ic_csa_count %d\n", + __func__, rvp->id, vap->iv_csa_count, ic->ic_csa_count); + + rtwn_update_beacon(vap, IEEE80211_BEACON_CSA); + } + IEEE80211_UNLOCK(ic); + + (void) rvp; +} + +int +rtwn_tx_beacon_check(struct rtwn_softc *sc, struct rtwn_vap *uvp) +{ + int ntries, error; + + for (ntries = 0; ntries < 5; ntries++) { + rtwn_reset_beacon_valid(sc, uvp->id); + + error = rtwn_tx_beacon(sc, uvp); + if (error != 0) + continue; + + error = rtwn_check_beacon_valid(sc, uvp->id); + if (error == 0) + break; + } + if (ntries == 5) { + device_printf(sc->sc_dev, + "%s: cannot push beacon into chip, error %d!\n", + __func__, error); + return (error); + } + + return (0); +} |