/*- * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any * redistribution must be conditioned upon including a substantially * similar Disclaimer requirement for further binary redistribution. * * NO WARRANTY * 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 NONINFRINGEMENT, MERCHANTIBILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. */ #include __FBSDID("$FreeBSD$"); /* * Driver for the Atheros Wireless LAN controller. * * This software is derived from work of Atsushi Onoe; his contribution * is greatly appreciated. */ #include "opt_inet.h" #include "opt_ath.h" /* * This is needed for register operations which are performed * by the driver - eg, calls to ath_hal_gettsf32(). * * It's also required for any AH_DEBUG checks in here, eg the * module dependencies. */ #include "opt_ah.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* for mp_ncpus */ #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_SUPERG #include #endif #ifdef IEEE80211_SUPPORT_TDMA #include #endif #include #ifdef INET #include #include #endif #include #include /* XXX for softled */ #include #include #include #include #include #include #include #include #ifdef ATH_TX99_DIAG #include #endif #define ATH_KTR_INTR KTR_SPARE4 #define ATH_KTR_ERR KTR_SPARE3 /* * ATH_BCBUF determines the number of vap's that can transmit * beacons and also (currently) the number of vap's that can * have unique mac addresses/bssid. When staggering beacons * 4 is probably a good max as otherwise the beacons become * very closely spaced and there is limited time for cab q traffic * to go out. You can burst beacons instead but that is not good * for stations in power save and at some point you really want * another radio (and channel). * * The limit on the number of mac addresses is tied to our use of * the U/L bit and tracking addresses in a byte; it would be * worthwhile to allow more for applications like proxy sta. */ CTASSERT(ATH_BCBUF <= 8); static struct ieee80211vap *ath_vap_create(struct ieee80211com *, const char [IFNAMSIZ], int, enum ieee80211_opmode, int, const uint8_t [IEEE80211_ADDR_LEN], const uint8_t [IEEE80211_ADDR_LEN]); static void ath_vap_delete(struct ieee80211vap *); static void ath_init(void *); static void ath_stop_locked(struct ifnet *); static void ath_stop(struct ifnet *); static void ath_start(struct ifnet *); static int ath_reset_vap(struct ieee80211vap *, u_long); static int ath_media_change(struct ifnet *); static void ath_watchdog(void *); static int ath_ioctl(struct ifnet *, u_long, caddr_t); static void ath_fatal_proc(void *, int); static void ath_bmiss_vap(struct ieee80211vap *); static void ath_bmiss_proc(void *, int); static void ath_key_update_begin(struct ieee80211vap *); static void ath_key_update_end(struct ieee80211vap *); static void ath_update_mcast(struct ifnet *); static void ath_update_promisc(struct ifnet *); static void ath_mode_init(struct ath_softc *); static void ath_setslottime(struct ath_softc *); static void ath_updateslot(struct ifnet *); static int ath_beaconq_setup(struct ath_hal *); static int ath_beacon_alloc(struct ath_softc *, struct ieee80211_node *); static void ath_beacon_update(struct ieee80211vap *, int item); static void ath_beacon_setup(struct ath_softc *, struct ath_buf *); static void ath_beacon_proc(void *, int); static struct ath_buf *ath_beacon_generate(struct ath_softc *, struct ieee80211vap *); static void ath_bstuck_proc(void *, int); static void ath_reset_proc(void *, int); static void ath_beacon_return(struct ath_softc *, struct ath_buf *); static void ath_beacon_free(struct ath_softc *); static void ath_beacon_config(struct ath_softc *, struct ieee80211vap *); static void ath_descdma_cleanup(struct ath_softc *sc, struct ath_descdma *, ath_bufhead *); static int ath_desc_alloc(struct ath_softc *); static void ath_desc_free(struct ath_softc *); static struct ieee80211_node *ath_node_alloc(struct ieee80211vap *, const uint8_t [IEEE80211_ADDR_LEN]); static void ath_node_cleanup(struct ieee80211_node *); static void ath_node_free(struct ieee80211_node *); static void ath_node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); static int ath_rxbuf_init(struct ath_softc *, struct ath_buf *); static void ath_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m, int subtype, int rssi, int nf); static void ath_setdefantenna(struct ath_softc *, u_int); static void ath_rx_proc(struct ath_softc *sc, int); static void ath_rx_tasklet(void *, int); static void ath_txq_init(struct ath_softc *sc, struct ath_txq *, int); static struct ath_txq *ath_txq_setup(struct ath_softc*, int qtype, int subtype); static int ath_tx_setup(struct ath_softc *, int, int); static int ath_wme_update(struct ieee80211com *); static void ath_tx_cleanupq(struct ath_softc *, struct ath_txq *); static void ath_tx_cleanup(struct ath_softc *); static void ath_tx_proc_q0(void *, int); static void ath_tx_proc_q0123(void *, int); static void ath_tx_proc(void *, int); static void ath_txq_sched_tasklet(void *, int); static int ath_chan_set(struct ath_softc *, struct ieee80211_channel *); static void ath_draintxq(struct ath_softc *, ATH_RESET_TYPE reset_type); static void ath_stoprecv(struct ath_softc *, int); static int ath_startrecv(struct ath_softc *); static void ath_chan_change(struct ath_softc *, struct ieee80211_channel *); static void ath_scan_start(struct ieee80211com *); static void ath_scan_end(struct ieee80211com *); static void ath_set_channel(struct ieee80211com *); static void ath_update_chw(struct ieee80211com *); static void ath_calibrate(void *); static int ath_newstate(struct ieee80211vap *, enum ieee80211_state, int); static void ath_setup_stationkey(struct ieee80211_node *); static void ath_newassoc(struct ieee80211_node *, int); static int ath_setregdomain(struct ieee80211com *, struct ieee80211_regdomain *, int, struct ieee80211_channel []); static void ath_getradiocaps(struct ieee80211com *, int, int *, struct ieee80211_channel []); static int ath_getchannels(struct ath_softc *); static int ath_rate_setup(struct ath_softc *, u_int mode); static void ath_setcurmode(struct ath_softc *, enum ieee80211_phymode); static void ath_announce(struct ath_softc *); static void ath_dfs_tasklet(void *, int); #ifdef IEEE80211_SUPPORT_TDMA static void ath_tdma_settimers(struct ath_softc *sc, u_int32_t nexttbtt, u_int32_t bintval); static void ath_tdma_bintvalsetup(struct ath_softc *sc, const struct ieee80211_tdma_state *tdma); static void ath_tdma_config(struct ath_softc *sc, struct ieee80211vap *vap); static void ath_tdma_update(struct ieee80211_node *ni, const struct ieee80211_tdma_param *tdma, int); static void ath_tdma_beacon_send(struct ath_softc *sc, struct ieee80211vap *vap); #define TDMA_EP_MULTIPLIER (1<<10) /* pow2 to optimize out * and / */ #define TDMA_LPF_LEN 6 #define TDMA_DUMMY_MARKER 0x127 #define TDMA_EP_MUL(x, mul) ((x) * (mul)) #define TDMA_IN(x) (TDMA_EP_MUL((x), TDMA_EP_MULTIPLIER)) #define TDMA_LPF(x, y, len) \ ((x != TDMA_DUMMY_MARKER) ? (((x) * ((len)-1) + (y)) / (len)) : (y)) #define TDMA_SAMPLE(x, y) do { \ x = TDMA_LPF((x), TDMA_IN(y), TDMA_LPF_LEN); \ } while (0) #define TDMA_EP_RND(x,mul) \ ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul)) #define TDMA_AVG(x) TDMA_EP_RND(x, TDMA_EP_MULTIPLIER) #endif /* IEEE80211_SUPPORT_TDMA */ SYSCTL_DECL(_hw_ath); /* XXX validate sysctl values */ static int ath_longcalinterval = 30; /* long cals every 30 secs */ SYSCTL_INT(_hw_ath, OID_AUTO, longcal, CTLFLAG_RW, &ath_longcalinterval, 0, "long chip calibration interval (secs)"); static int ath_shortcalinterval = 100; /* short cals every 100 ms */ SYSCTL_INT(_hw_ath, OID_AUTO, shortcal, CTLFLAG_RW, &ath_shortcalinterval, 0, "short chip calibration interval (msecs)"); static int ath_resetcalinterval = 20*60; /* reset cal state 20 mins */ SYSCTL_INT(_hw_ath, OID_AUTO, resetcal, CTLFLAG_RW, &ath_resetcalinterval, 0, "reset chip calibration results (secs)"); static int ath_anicalinterval = 100; /* ANI calibration - 100 msec */ SYSCTL_INT(_hw_ath, OID_AUTO, anical, CTLFLAG_RW, &ath_anicalinterval, 0, "ANI calibration (msecs)"); static int ath_rxbuf = ATH_RXBUF; /* # rx buffers to allocate */ SYSCTL_INT(_hw_ath, OID_AUTO, rxbuf, CTLFLAG_RW, &ath_rxbuf, 0, "rx buffers allocated"); TUNABLE_INT("hw.ath.rxbuf", &ath_rxbuf); static int ath_txbuf = ATH_TXBUF; /* # tx buffers to allocate */ SYSCTL_INT(_hw_ath, OID_AUTO, txbuf, CTLFLAG_RW, &ath_txbuf, 0, "tx buffers allocated"); TUNABLE_INT("hw.ath.txbuf", &ath_txbuf); static int ath_bstuck_threshold = 4; /* max missed beacons */ SYSCTL_INT(_hw_ath, OID_AUTO, bstuck, CTLFLAG_RW, &ath_bstuck_threshold, 0, "max missed beacon xmits before chip reset"); MALLOC_DEFINE(M_ATHDEV, "athdev", "ath driver dma buffers"); #define HAL_MODE_HT20 (HAL_MODE_11NG_HT20 | HAL_MODE_11NA_HT20) #define HAL_MODE_HT40 \ (HAL_MODE_11NG_HT40PLUS | HAL_MODE_11NG_HT40MINUS | \ HAL_MODE_11NA_HT40PLUS | HAL_MODE_11NA_HT40MINUS) int ath_attach(u_int16_t devid, struct ath_softc *sc) { struct ifnet *ifp; struct ieee80211com *ic; struct ath_hal *ah = NULL; HAL_STATUS status; int error = 0, i; u_int wmodes; uint8_t macaddr[IEEE80211_ADDR_LEN]; int rx_chainmask, tx_chainmask; DPRINTF(sc, ATH_DEBUG_ANY, "%s: devid 0x%x\n", __func__, devid); ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211); if (ifp == NULL) { device_printf(sc->sc_dev, "can not if_alloc()\n"); error = ENOSPC; goto bad; } ic = ifp->if_l2com; /* set these up early for if_printf use */ if_initname(ifp, device_get_name(sc->sc_dev), device_get_unit(sc->sc_dev)); ah = ath_hal_attach(devid, sc, sc->sc_st, sc->sc_sh, sc->sc_eepromdata, &status); if (ah == NULL) { if_printf(ifp, "unable to attach hardware; HAL status %u\n", status); error = ENXIO; goto bad; } sc->sc_ah = ah; sc->sc_invalid = 0; /* ready to go, enable interrupt handling */ #ifdef ATH_DEBUG sc->sc_debug = ath_debug; #endif /* * Check if the MAC has multi-rate retry support. * We do this by trying to setup a fake extended * descriptor. MAC's that don't have support will * return false w/o doing anything. MAC's that do * support it will return true w/o doing anything. */ sc->sc_mrretry = ath_hal_setupxtxdesc(ah, NULL, 0,0, 0,0, 0,0); /* * Check if the device has hardware counters for PHY * errors. If so we need to enable the MIB interrupt * so we can act on stat triggers. */ if (ath_hal_hwphycounters(ah)) sc->sc_needmib = 1; /* * Get the hardware key cache size. */ sc->sc_keymax = ath_hal_keycachesize(ah); if (sc->sc_keymax > ATH_KEYMAX) { if_printf(ifp, "Warning, using only %u of %u key cache slots\n", ATH_KEYMAX, sc->sc_keymax); sc->sc_keymax = ATH_KEYMAX; } /* * Reset the key cache since some parts do not * reset the contents on initial power up. */ for (i = 0; i < sc->sc_keymax; i++) ath_hal_keyreset(ah, i); /* * Collect the default channel list. */ error = ath_getchannels(sc); if (error != 0) goto bad; /* * Setup rate tables for all potential media types. */ ath_rate_setup(sc, IEEE80211_MODE_11A); ath_rate_setup(sc, IEEE80211_MODE_11B); ath_rate_setup(sc, IEEE80211_MODE_11G); ath_rate_setup(sc, IEEE80211_MODE_TURBO_A); ath_rate_setup(sc, IEEE80211_MODE_TURBO_G); ath_rate_setup(sc, IEEE80211_MODE_STURBO_A); ath_rate_setup(sc, IEEE80211_MODE_11NA); ath_rate_setup(sc, IEEE80211_MODE_11NG); ath_rate_setup(sc, IEEE80211_MODE_HALF); ath_rate_setup(sc, IEEE80211_MODE_QUARTER); /* NB: setup here so ath_rate_update is happy */ ath_setcurmode(sc, IEEE80211_MODE_11A); /* * Allocate tx+rx descriptors and populate the lists. */ error = ath_desc_alloc(sc); if (error != 0) { if_printf(ifp, "failed to allocate descriptors: %d\n", error); goto bad; } callout_init_mtx(&sc->sc_cal_ch, &sc->sc_mtx, 0); callout_init_mtx(&sc->sc_wd_ch, &sc->sc_mtx, 0); ATH_TXBUF_LOCK_INIT(sc); sc->sc_tq = taskqueue_create("ath_taskq", M_NOWAIT, taskqueue_thread_enqueue, &sc->sc_tq); taskqueue_start_threads(&sc->sc_tq, 1, PI_NET, "%s taskq", ifp->if_xname); TASK_INIT(&sc->sc_rxtask, 0, ath_rx_tasklet, sc); TASK_INIT(&sc->sc_bmisstask, 0, ath_bmiss_proc, sc); TASK_INIT(&sc->sc_bstucktask,0, ath_bstuck_proc, sc); TASK_INIT(&sc->sc_resettask,0, ath_reset_proc, sc); TASK_INIT(&sc->sc_txqtask,0, ath_txq_sched_tasklet, sc); /* * Allocate hardware transmit queues: one queue for * beacon frames and one data queue for each QoS * priority. Note that the hal handles resetting * these queues at the needed time. * * XXX PS-Poll */ sc->sc_bhalq = ath_beaconq_setup(ah); if (sc->sc_bhalq == (u_int) -1) { if_printf(ifp, "unable to setup a beacon xmit queue!\n"); error = EIO; goto bad2; } sc->sc_cabq = ath_txq_setup(sc, HAL_TX_QUEUE_CAB, 0); if (sc->sc_cabq == NULL) { if_printf(ifp, "unable to setup CAB xmit queue!\n"); error = EIO; goto bad2; } /* NB: insure BK queue is the lowest priority h/w queue */ if (!ath_tx_setup(sc, WME_AC_BK, HAL_WME_AC_BK)) { if_printf(ifp, "unable to setup xmit queue for %s traffic!\n", ieee80211_wme_acnames[WME_AC_BK]); error = EIO; goto bad2; } if (!ath_tx_setup(sc, WME_AC_BE, HAL_WME_AC_BE) || !ath_tx_setup(sc, WME_AC_VI, HAL_WME_AC_VI) || !ath_tx_setup(sc, WME_AC_VO, HAL_WME_AC_VO)) { /* * Not enough hardware tx queues to properly do WME; * just punt and assign them all to the same h/w queue. * We could do a better job of this if, for example, * we allocate queues when we switch from station to * AP mode. */ if (sc->sc_ac2q[WME_AC_VI] != NULL) ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_VI]); if (sc->sc_ac2q[WME_AC_BE] != NULL) ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_BE]); sc->sc_ac2q[WME_AC_BE] = sc->sc_ac2q[WME_AC_BK]; sc->sc_ac2q[WME_AC_VI] = sc->sc_ac2q[WME_AC_BK]; sc->sc_ac2q[WME_AC_VO] = sc->sc_ac2q[WME_AC_BK]; } /* * Special case certain configurations. Note the * CAB queue is handled by these specially so don't * include them when checking the txq setup mask. */ switch (sc->sc_txqsetup &~ (1<sc_cabq->axq_qnum)) { case 0x01: TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0, sc); break; case 0x0f: TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0123, sc); break; default: TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc, sc); break; } /* * Setup rate control. Some rate control modules * call back to change the anntena state so expose * the necessary entry points. * XXX maybe belongs in struct ath_ratectrl? */ sc->sc_setdefantenna = ath_setdefantenna; sc->sc_rc = ath_rate_attach(sc); if (sc->sc_rc == NULL) { error = EIO; goto bad2; } /* Attach DFS module */ if (! ath_dfs_attach(sc)) { device_printf(sc->sc_dev, "%s: unable to attach DFS\n", __func__); error = EIO; goto bad2; } /* Start DFS processing tasklet */ TASK_INIT(&sc->sc_dfstask, 0, ath_dfs_tasklet, sc); /* Configure LED state */ sc->sc_blinking = 0; sc->sc_ledstate = 1; sc->sc_ledon = 0; /* low true */ sc->sc_ledidle = (2700*hz)/1000; /* 2.7sec */ callout_init(&sc->sc_ledtimer, CALLOUT_MPSAFE); /* * Don't setup hardware-based blinking. * * Although some NICs may have this configured in the * default reset register values, the user may wish * to alter which pins have which function. * * The reference driver attaches the MAC network LED to GPIO1 and * the MAC power LED to GPIO2. However, the DWA-552 cardbus * NIC has these reversed. */ sc->sc_hardled = (1 == 0); sc->sc_led_net_pin = -1; sc->sc_led_pwr_pin = -1; /* * Auto-enable soft led processing for IBM cards and for * 5211 minipci cards. Users can also manually enable/disable * support with a sysctl. */ sc->sc_softled = (devid == AR5212_DEVID_IBM || devid == AR5211_DEVID); ath_led_config(sc); ath_hal_setledstate(ah, HAL_LED_INIT); ifp->if_softc = sc; ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; ifp->if_start = ath_start; ifp->if_ioctl = ath_ioctl; ifp->if_init = ath_init; IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; IFQ_SET_READY(&ifp->if_snd); ic->ic_ifp = ifp; /* XXX not right but it's not used anywhere important */ ic->ic_phytype = IEEE80211_T_OFDM; ic->ic_opmode = IEEE80211_M_STA; ic->ic_caps = IEEE80211_C_STA /* station mode */ | IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ | IEEE80211_C_HOSTAP /* hostap mode */ | IEEE80211_C_MONITOR /* monitor mode */ | IEEE80211_C_AHDEMO /* adhoc demo mode */ | IEEE80211_C_WDS /* 4-address traffic works */ | IEEE80211_C_MBSS /* mesh point link mode */ | IEEE80211_C_SHPREAMBLE /* short preamble supported */ | IEEE80211_C_SHSLOT /* short slot time supported */ | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ | IEEE80211_C_BGSCAN /* capable of bg scanning */ | IEEE80211_C_TXFRAG /* handle tx frags */ #ifdef ATH_ENABLE_DFS | IEEE80211_C_DFS /* Enable radar detection */ #endif ; /* * Query the hal to figure out h/w crypto support. */ if (ath_hal_ciphersupported(ah, HAL_CIPHER_WEP)) ic->ic_cryptocaps |= IEEE80211_CRYPTO_WEP; if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_OCB)) ic->ic_cryptocaps |= IEEE80211_CRYPTO_AES_OCB; if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_CCM)) ic->ic_cryptocaps |= IEEE80211_CRYPTO_AES_CCM; if (ath_hal_ciphersupported(ah, HAL_CIPHER_CKIP)) ic->ic_cryptocaps |= IEEE80211_CRYPTO_CKIP; if (ath_hal_ciphersupported(ah, HAL_CIPHER_TKIP)) { ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIP; /* * Check if h/w does the MIC and/or whether the * separate key cache entries are required to * handle both tx+rx MIC keys. */ if (ath_hal_ciphersupported(ah, HAL_CIPHER_MIC)) ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIPMIC; /* * If the h/w supports storing tx+rx MIC keys * in one cache slot automatically enable use. */ if (ath_hal_hastkipsplit(ah) || !ath_hal_settkipsplit(ah, AH_FALSE)) sc->sc_splitmic = 1; /* * If the h/w can do TKIP MIC together with WME then * we use it; otherwise we force the MIC to be done * in software by the net80211 layer. */ if (ath_hal_haswmetkipmic(ah)) sc->sc_wmetkipmic = 1; } sc->sc_hasclrkey = ath_hal_ciphersupported(ah, HAL_CIPHER_CLR); /* * Check for multicast key search support. */ if (ath_hal_hasmcastkeysearch(sc->sc_ah) && !ath_hal_getmcastkeysearch(sc->sc_ah)) { ath_hal_setmcastkeysearch(sc->sc_ah, 1); } sc->sc_mcastkey = ath_hal_getmcastkeysearch(ah); /* * Mark key cache slots associated with global keys * as in use. If we knew TKIP was not to be used we * could leave the +32, +64, and +32+64 slots free. */ for (i = 0; i < IEEE80211_WEP_NKID; i++) { setbit(sc->sc_keymap, i); setbit(sc->sc_keymap, i+64); if (sc->sc_splitmic) { setbit(sc->sc_keymap, i+32); setbit(sc->sc_keymap, i+32+64); } } /* * TPC support can be done either with a global cap or * per-packet support. The latter is not available on * all parts. We're a bit pedantic here as all parts * support a global cap. */ if (ath_hal_hastpc(ah) || ath_hal_hastxpowlimit(ah)) ic->ic_caps |= IEEE80211_C_TXPMGT; /* * Mark WME capability only if we have sufficient * hardware queues to do proper priority scheduling. */ if (sc->sc_ac2q[WME_AC_BE] != sc->sc_ac2q[WME_AC_BK]) ic->ic_caps |= IEEE80211_C_WME; /* * Check for misc other capabilities. */ if (ath_hal_hasbursting(ah)) ic->ic_caps |= IEEE80211_C_BURST; sc->sc_hasbmask = ath_hal_hasbssidmask(ah); sc->sc_hasbmatch = ath_hal_hasbssidmatch(ah); sc->sc_hastsfadd = ath_hal_hastsfadjust(ah); sc->sc_rxslink = ath_hal_self_linked_final_rxdesc(ah); sc->sc_rxtsf32 = ath_hal_has_long_rxdesc_tsf(ah); if (ath_hal_hasfastframes(ah)) ic->ic_caps |= IEEE80211_C_FF; wmodes = ath_hal_getwirelessmodes(ah); if (wmodes & (HAL_MODE_108G|HAL_MODE_TURBO)) ic->ic_caps |= IEEE80211_C_TURBOP; #ifdef IEEE80211_SUPPORT_TDMA if (ath_hal_macversion(ah) > 0x78) { ic->ic_caps |= IEEE80211_C_TDMA; /* capable of TDMA */ ic->ic_tdma_update = ath_tdma_update; } #endif /* * TODO: enforce that at least this many frames are available * in the txbuf list before allowing data frames (raw or * otherwise) to be transmitted. */ sc->sc_txq_data_minfree = 10; /* * Leave this as default to maintain legacy behaviour. * Shortening the cabq/mcastq may end up causing some * undesirable behaviour. */ sc->sc_txq_mcastq_maxdepth = ath_txbuf; /* * Allow the TX and RX chainmasks to be overridden by * environment variables and/or device.hints. * * This must be done early - before the hardware is * calibrated or before the 802.11n stream calculation * is done. */ if (resource_int_value(device_get_name(sc->sc_dev), device_get_unit(sc->sc_dev), "rx_chainmask", &rx_chainmask) == 0) { device_printf(sc->sc_dev, "Setting RX chainmask to 0x%x\n", rx_chainmask); (void) ath_hal_setrxchainmask(sc->sc_ah, rx_chainmask); } if (resource_int_value(device_get_name(sc->sc_dev), device_get_unit(sc->sc_dev), "tx_chainmask", &tx_chainmask) == 0) { device_printf(sc->sc_dev, "Setting TX chainmask to 0x%x\n", tx_chainmask); (void) ath_hal_settxchainmask(sc->sc_ah, tx_chainmask); } /* * The if_ath 11n support is completely not ready for normal use. * Enabling this option will likely break everything and everything. * Don't think of doing that unless you know what you're doing. */ #ifdef ATH_ENABLE_11N /* * Query HT capabilities */ if (ath_hal_getcapability(ah, HAL_CAP_HT, 0, NULL) == HAL_OK && (wmodes & (HAL_MODE_HT20 | HAL_MODE_HT40))) { int rxs, txs; device_printf(sc->sc_dev, "[HT] enabling HT modes\n"); ic->ic_htcaps = IEEE80211_HTC_HT /* HT operation */ | IEEE80211_HTC_AMPDU /* A-MPDU tx/rx */ | IEEE80211_HTC_AMSDU /* A-MSDU tx/rx */ | IEEE80211_HTCAP_MAXAMSDU_3839 /* max A-MSDU length */ | IEEE80211_HTCAP_SMPS_OFF; /* SM power save off */ ; /* * Enable short-GI for HT20 only if the hardware * advertises support. * Notably, anything earlier than the AR9287 doesn't. */ if ((ath_hal_getcapability(ah, HAL_CAP_HT20_SGI, 0, NULL) == HAL_OK) && (wmodes & HAL_MODE_HT20)) { device_printf(sc->sc_dev, "[HT] enabling short-GI in 20MHz mode\n"); ic->ic_htcaps |= IEEE80211_HTCAP_SHORTGI20; } if (wmodes & HAL_MODE_HT40) ic->ic_htcaps |= IEEE80211_HTCAP_CHWIDTH40 | IEEE80211_HTCAP_SHORTGI40; /* * TX/RX streams need to be taken into account when * negotiating which MCS rates it'll receive and * what MCS rates are available for TX. */ (void) ath_hal_getcapability(ah, HAL_CAP_STREAMS, 0, &txs); (void) ath_hal_getcapability(ah, HAL_CAP_STREAMS, 1, &rxs); ath_hal_getrxchainmask(ah, &sc->sc_rxchainmask); ath_hal_gettxchainmask(ah, &sc->sc_txchainmask); ic->ic_txstream = txs; ic->ic_rxstream = rxs; device_printf(sc->sc_dev, "[HT] %d RX streams; %d TX streams\n", rxs, txs); } #endif /* * Check if the hardware requires PCI register serialisation. * Some of the Owl based MACs require this. */ if (mp_ncpus > 1 && ath_hal_getcapability(ah, HAL_CAP_SERIALISE_WAR, 0, NULL) == HAL_OK) { sc->sc_ah->ah_config.ah_serialise_reg_war = 1; device_printf(sc->sc_dev, "Enabling register serialisation\n"); } /* * Indicate we need the 802.11 header padded to a * 32-bit boundary for 4-address and QoS frames. */ ic->ic_flags |= IEEE80211_F_DATAPAD; /* * Query the hal about antenna support. */ sc->sc_defant = ath_hal_getdefantenna(ah); /* * Not all chips have the VEOL support we want to * use with IBSS beacons; check here for it. */ sc->sc_hasveol = ath_hal_hasveol(ah); /* get mac address from hardware */ ath_hal_getmac(ah, macaddr); if (sc->sc_hasbmask) ath_hal_getbssidmask(ah, sc->sc_hwbssidmask); /* NB: used to size node table key mapping array */ ic->ic_max_keyix = sc->sc_keymax; /* call MI attach routine. */ ieee80211_ifattach(ic, macaddr); ic->ic_setregdomain = ath_setregdomain; ic->ic_getradiocaps = ath_getradiocaps; sc->sc_opmode = HAL_M_STA; /* override default methods */ ic->ic_newassoc = ath_newassoc; ic->ic_updateslot = ath_updateslot; ic->ic_wme.wme_update = ath_wme_update; ic->ic_vap_create = ath_vap_create; ic->ic_vap_delete = ath_vap_delete; ic->ic_raw_xmit = ath_raw_xmit; ic->ic_update_mcast = ath_update_mcast; ic->ic_update_promisc = ath_update_promisc; ic->ic_node_alloc = ath_node_alloc; sc->sc_node_free = ic->ic_node_free; ic->ic_node_free = ath_node_free; sc->sc_node_cleanup = ic->ic_node_cleanup; ic->ic_node_cleanup = ath_node_cleanup; ic->ic_node_getsignal = ath_node_getsignal; ic->ic_scan_start = ath_scan_start; ic->ic_scan_end = ath_scan_end; ic->ic_set_channel = ath_set_channel; ic->ic_update_chw = ath_update_chw; /* 802.11n specific - but just override anyway */ sc->sc_addba_request = ic->ic_addba_request; sc->sc_addba_response = ic->ic_addba_response; sc->sc_addba_stop = ic->ic_addba_stop; sc->sc_bar_response = ic->ic_bar_response; sc->sc_addba_response_timeout = ic->ic_addba_response_timeout; ic->ic_addba_request = ath_addba_request; ic->ic_addba_response = ath_addba_response; ic->ic_addba_response_timeout = ath_addba_response_timeout; ic->ic_addba_stop = ath_addba_stop; ic->ic_bar_response = ath_bar_response; ieee80211_radiotap_attach(ic, &sc->sc_tx_th.wt_ihdr, sizeof(sc->sc_tx_th), ATH_TX_RADIOTAP_PRESENT, &sc->sc_rx_th.wr_ihdr, sizeof(sc->sc_rx_th), ATH_RX_RADIOTAP_PRESENT); /* * Setup dynamic sysctl's now that country code and * regdomain are available from the hal. */ ath_sysctlattach(sc); ath_sysctl_stats_attach(sc); ath_sysctl_hal_attach(sc); if (bootverbose) ieee80211_announce(ic); ath_announce(sc); return 0; bad2: ath_tx_cleanup(sc); ath_desc_free(sc); bad: if (ah) ath_hal_detach(ah); if (ifp != NULL) if_free(ifp); sc->sc_invalid = 1; return error; } int ath_detach(struct ath_softc *sc) { struct ifnet *ifp = sc->sc_ifp; DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", __func__, ifp->if_flags); /* * NB: the order of these is important: * o stop the chip so no more interrupts will fire * o call the 802.11 layer before detaching the hal to * insure callbacks into the driver to delete global * key cache entries can be handled * o free the taskqueue which drains any pending tasks * o reclaim the tx queue data structures after calling * the 802.11 layer as we'll get called back to reclaim * node state and potentially want to use them * o to cleanup the tx queues the hal is called, so detach * it last * Other than that, it's straightforward... */ ath_stop(ifp); ieee80211_ifdetach(ifp->if_l2com); taskqueue_free(sc->sc_tq); #ifdef ATH_TX99_DIAG if (sc->sc_tx99 != NULL) sc->sc_tx99->detach(sc->sc_tx99); #endif ath_rate_detach(sc->sc_rc); ath_dfs_detach(sc); ath_desc_free(sc); ath_tx_cleanup(sc); ath_hal_detach(sc->sc_ah); /* NB: sets chip in full sleep */ if_free(ifp); return 0; } /* * MAC address handling for multiple BSS on the same radio. * The first vap uses the MAC address from the EEPROM. For * subsequent vap's we set the U/L bit (bit 1) in the MAC * address and use the next six bits as an index. */ static void assign_address(struct ath_softc *sc, uint8_t mac[IEEE80211_ADDR_LEN], int clone) { int i; if (clone && sc->sc_hasbmask) { /* NB: we only do this if h/w supports multiple bssid */ for (i = 0; i < 8; i++) if ((sc->sc_bssidmask & (1<sc_bssidmask |= 1<sc_hwbssidmask[0] &= ~mac[0]; if (i == 0) sc->sc_nbssid0++; } static void reclaim_address(struct ath_softc *sc, const uint8_t mac[IEEE80211_ADDR_LEN]) { int i = mac[0] >> 2; uint8_t mask; if (i != 0 || --sc->sc_nbssid0 == 0) { sc->sc_bssidmask &= ~(1<sc_bssidmask & (1<sc_hwbssidmask[0] |= mask; } } /* * Assign a beacon xmit slot. We try to space out * assignments so when beacons are staggered the * traffic coming out of the cab q has maximal time * to go out before the next beacon is scheduled. */ static int assign_bslot(struct ath_softc *sc) { u_int slot, free; free = 0; for (slot = 0; slot < ATH_BCBUF; slot++) if (sc->sc_bslot[slot] == NULL) { if (sc->sc_bslot[(slot+1)%ATH_BCBUF] == NULL && sc->sc_bslot[(slot-1)%ATH_BCBUF] == NULL) return slot; free = slot; /* NB: keep looking for a double slot */ } return free; } static struct ieee80211vap * ath_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t mac0[IEEE80211_ADDR_LEN]) { struct ath_softc *sc = ic->ic_ifp->if_softc; struct ath_vap *avp; struct ieee80211vap *vap; uint8_t mac[IEEE80211_ADDR_LEN]; int needbeacon, error; enum ieee80211_opmode ic_opmode; avp = (struct ath_vap *) malloc(sizeof(struct ath_vap), M_80211_VAP, M_WAITOK | M_ZERO); needbeacon = 0; IEEE80211_ADDR_COPY(mac, mac0); ATH_LOCK(sc); ic_opmode = opmode; /* default to opmode of new vap */ switch (opmode) { case IEEE80211_M_STA: if (sc->sc_nstavaps != 0) { /* XXX only 1 for now */ device_printf(sc->sc_dev, "only 1 sta vap supported\n"); goto bad; } if (sc->sc_nvaps) { /* * With multiple vaps we must fall back * to s/w beacon miss handling. */ flags |= IEEE80211_CLONE_NOBEACONS; } if (flags & IEEE80211_CLONE_NOBEACONS) { /* * Station mode w/o beacons are implemented w/ AP mode. */ ic_opmode = IEEE80211_M_HOSTAP; } break; case IEEE80211_M_IBSS: if (sc->sc_nvaps != 0) { /* XXX only 1 for now */ device_printf(sc->sc_dev, "only 1 ibss vap supported\n"); goto bad; } needbeacon = 1; break; case IEEE80211_M_AHDEMO: #ifdef IEEE80211_SUPPORT_TDMA if (flags & IEEE80211_CLONE_TDMA) { if (sc->sc_nvaps != 0) { device_printf(sc->sc_dev, "only 1 tdma vap supported\n"); goto bad; } needbeacon = 1; flags |= IEEE80211_CLONE_NOBEACONS; } /* fall thru... */ #endif case IEEE80211_M_MONITOR: if (sc->sc_nvaps != 0 && ic->ic_opmode != opmode) { /* * Adopt existing mode. Adding a monitor or ahdemo * vap to an existing configuration is of dubious * value but should be ok. */ /* XXX not right for monitor mode */ ic_opmode = ic->ic_opmode; } break; case IEEE80211_M_HOSTAP: case IEEE80211_M_MBSS: needbeacon = 1; break; case IEEE80211_M_WDS: if (sc->sc_nvaps != 0 && ic->ic_opmode == IEEE80211_M_STA) { device_printf(sc->sc_dev, "wds not supported in sta mode\n"); goto bad; } /* * Silently remove any request for a unique * bssid; WDS vap's always share the local * mac address. */ flags &= ~IEEE80211_CLONE_BSSID; if (sc->sc_nvaps == 0) ic_opmode = IEEE80211_M_HOSTAP; else ic_opmode = ic->ic_opmode; break; default: device_printf(sc->sc_dev, "unknown opmode %d\n", opmode); goto bad; } /* * Check that a beacon buffer is available; the code below assumes it. */ if (needbeacon & TAILQ_EMPTY(&sc->sc_bbuf)) { device_printf(sc->sc_dev, "no beacon buffer available\n"); goto bad; } /* STA, AHDEMO? */ if (opmode == IEEE80211_M_HOSTAP || opmode == IEEE80211_M_MBSS) { assign_address(sc, mac, flags & IEEE80211_CLONE_BSSID); ath_hal_setbssidmask(sc->sc_ah, sc->sc_hwbssidmask); } vap = &avp->av_vap; /* XXX can't hold mutex across if_alloc */ ATH_UNLOCK(sc); error = ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac); ATH_LOCK(sc); if (error != 0) { device_printf(sc->sc_dev, "%s: error %d creating vap\n", __func__, error); goto bad2; } /* h/w crypto support */ vap->iv_key_alloc = ath_key_alloc; vap->iv_key_delete = ath_key_delete; vap->iv_key_set = ath_key_set; vap->iv_key_update_begin = ath_key_update_begin; vap->iv_key_update_end = ath_key_update_end; /* override various methods */ avp->av_recv_mgmt = vap->iv_recv_mgmt; vap->iv_recv_mgmt = ath_recv_mgmt; vap->iv_reset = ath_reset_vap; vap->iv_update_beacon = ath_beacon_update; avp->av_newstate = vap->iv_newstate; vap->iv_newstate = ath_newstate; avp->av_bmiss = vap->iv_bmiss; vap->iv_bmiss = ath_bmiss_vap; /* Set default parameters */ /* * Anything earlier than some AR9300 series MACs don't * support a smaller MPDU density. */ vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_8; /* * All NICs can handle the maximum size, however * AR5416 based MACs can only TX aggregates w/ RTS * protection when the total aggregate size is <= 8k. * However, for now that's enforced by the TX path. */ vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_64K; avp->av_bslot = -1; if (needbeacon) { /* * Allocate beacon state and setup the q for buffered * multicast frames. We know a beacon buffer is * available because we checked above. */ avp->av_bcbuf = TAILQ_FIRST(&sc->sc_bbuf); TAILQ_REMOVE(&sc->sc_bbuf, avp->av_bcbuf, bf_list); if (opmode != IEEE80211_M_IBSS || !sc->sc_hasveol) { /* * Assign the vap to a beacon xmit slot. As above * this cannot fail to find a free one. */ avp->av_bslot = assign_bslot(sc); KASSERT(sc->sc_bslot[avp->av_bslot] == NULL, ("beacon slot %u not empty", avp->av_bslot)); sc->sc_bslot[avp->av_bslot] = vap; sc->sc_nbcnvaps++; } if (sc->sc_hastsfadd && sc->sc_nbcnvaps > 0) { /* * Multple vaps are to transmit beacons and we * have h/w support for TSF adjusting; enable * use of staggered beacons. */ sc->sc_stagbeacons = 1; } ath_txq_init(sc, &avp->av_mcastq, ATH_TXQ_SWQ); } ic->ic_opmode = ic_opmode; if (opmode != IEEE80211_M_WDS) { sc->sc_nvaps++; if (opmode == IEEE80211_M_STA) sc->sc_nstavaps++; if (opmode == IEEE80211_M_MBSS) sc->sc_nmeshvaps++; } switch (ic_opmode) { case IEEE80211_M_IBSS: sc->sc_opmode = HAL_M_IBSS; break; case IEEE80211_M_STA: sc->sc_opmode = HAL_M_STA; break; case IEEE80211_M_AHDEMO: #ifdef IEEE80211_SUPPORT_TDMA if (vap->iv_caps & IEEE80211_C_TDMA) { sc->sc_tdma = 1; /* NB: disable tsf adjust */ sc->sc_stagbeacons = 0; } /* * NB: adhoc demo mode is a pseudo mode; to the hal it's * just ap mode. */ /* fall thru... */ #endif case IEEE80211_M_HOSTAP: case IEEE80211_M_MBSS: sc->sc_opmode = HAL_M_HOSTAP; break; case IEEE80211_M_MONITOR: sc->sc_opmode = HAL_M_MONITOR; break; default: /* XXX should not happen */ break; } if (sc->sc_hastsfadd) { /* * Configure whether or not TSF adjust should be done. */ ath_hal_settsfadjust(sc->sc_ah, sc->sc_stagbeacons); } if (flags & IEEE80211_CLONE_NOBEACONS) { /* * Enable s/w beacon miss handling. */ sc->sc_swbmiss = 1; } ATH_UNLOCK(sc); /* complete setup */ ieee80211_vap_attach(vap, ath_media_change, ieee80211_media_status); return vap; bad2: reclaim_address(sc, mac); ath_hal_setbssidmask(sc->sc_ah, sc->sc_hwbssidmask); bad: free(avp, M_80211_VAP); ATH_UNLOCK(sc); return NULL; } static void ath_vap_delete(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; struct ifnet *ifp = ic->ic_ifp; struct ath_softc *sc = ifp->if_softc; struct ath_hal *ah = sc->sc_ah; struct ath_vap *avp = ATH_VAP(vap); DPRINTF(sc, ATH_DEBUG_RESET, "%s: called\n", __func__); if (ifp->if_drv_flags & IFF_DRV_RUNNING) { /* * Quiesce the hardware while we remove the vap. In * particular we need to reclaim all references to * the vap state by any frames pending on the tx queues. */ ath_hal_intrset(ah, 0); /* disable interrupts */ ath_draintxq(sc, ATH_RESET_DEFAULT); /* stop hw xmit side */ /* XXX Do all frames from all vaps/nodes need draining here? */ ath_stoprecv(sc, 1); /* stop recv side */ } ieee80211_vap_detach(vap); /* * XXX Danger Will Robinson! Danger! * * Because ieee80211_vap_detach() can queue a frame (the station * diassociate message?) after we've drained the TXQ and * flushed the software TXQ, we will end up with a frame queued * to a node whose vap is about to be freed. * * To work around this, flush the hardware/software again. * This may be racy - the ath task may be running and the packet * may be being scheduled between sw->hw txq. Tsk. * * TODO: figure out why a new node gets allocated somewhere around * here (after the ath_tx_swq() call; and after an ath_stop_locked() * call!) */ ath_draintxq(sc, ATH_RESET_DEFAULT); ATH_LOCK(sc); /* * Reclaim beacon state. Note this must be done before * the vap instance is reclaimed as we may have a reference * to it in the buffer for the beacon frame. */ if (avp->av_bcbuf != NULL) { if (avp->av_bslot != -1) { sc->sc_bslot[avp->av_bslot] = NULL; sc->sc_nbcnvaps--; } ath_beacon_return(sc, avp->av_bcbuf); avp->av_bcbuf = NULL; if (sc->sc_nbcnvaps == 0) { sc->sc_stagbeacons = 0; if (sc->sc_hastsfadd) ath_hal_settsfadjust(sc->sc_ah, 0); } /* * Reclaim any pending mcast frames for the vap. */ ath_tx_draintxq(sc, &avp->av_mcastq); ATH_TXQ_LOCK_DESTROY(&avp->av_mcastq); } /* * Update bookkeeping. */ if (vap->iv_opmode == IEEE80211_M_STA) { sc->sc_nstavaps--; if (sc->sc_nstavaps == 0 && sc->sc_swbmiss) sc->sc_swbmiss = 0; } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || vap->iv_opmode == IEEE80211_M_MBSS) { reclaim_address(sc, vap->iv_myaddr); ath_hal_setbssidmask(ah, sc->sc_hwbssidmask); if (vap->iv_opmode == IEEE80211_M_MBSS) sc->sc_nmeshvaps--; } if (vap->iv_opmode != IEEE80211_M_WDS) sc->sc_nvaps--; #ifdef IEEE80211_SUPPORT_TDMA /* TDMA operation ceases when the last vap is destroyed */ if (sc->sc_tdma && sc->sc_nvaps == 0) { sc->sc_tdma = 0; sc->sc_swbmiss = 0; } #endif free(avp, M_80211_VAP); if (ifp->if_drv_flags & IFF_DRV_RUNNING) { /* * Restart rx+tx machines if still running (RUNNING will * be reset if we just destroyed the last vap). */ if (ath_startrecv(sc) != 0) if_printf(ifp, "%s: unable to restart recv logic\n", __func__); if (sc->sc_beacons) { /* restart beacons */ #ifdef IEEE80211_SUPPORT_TDMA if (sc->sc_tdma) ath_tdma_config(sc, NULL); else #endif ath_beacon_config(sc, NULL); } ath_hal_intrset(ah, sc->sc_imask); } ATH_UNLOCK(sc); } void ath_suspend(struct ath_softc *sc) { struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", __func__, ifp->if_flags); sc->sc_resume_up = (ifp->if_flags & IFF_UP) != 0; if (ic->ic_opmode == IEEE80211_M_STA) ath_stop(ifp); else ieee80211_suspend_all(ic); /* * NB: don't worry about putting the chip in low power * mode; pci will power off our socket on suspend and * CardBus detaches the device. */ } /* * Reset the key cache since some parts do not reset the * contents on resume. First we clear all entries, then * re-load keys that the 802.11 layer assumes are setup * in h/w. */ static void ath_reset_keycache(struct ath_softc *sc) { struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; struct ath_hal *ah = sc->sc_ah; int i; for (i = 0; i < sc->sc_keymax; i++) ath_hal_keyreset(ah, i); ieee80211_crypto_reload_keys(ic); } void ath_resume(struct ath_softc *sc) { struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; struct ath_hal *ah = sc->sc_ah; HAL_STATUS status; DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", __func__, ifp->if_flags); /* * Must reset the chip before we reload the * keycache as we were powered down on suspend. */ ath_hal_reset(ah, sc->sc_opmode, sc->sc_curchan != NULL ? sc->sc_curchan : ic->ic_curchan, AH_FALSE, &status); ath_reset_keycache(sc); /* Let DFS at it in case it's a DFS channel */ ath_dfs_radar_enable(sc, ic->ic_curchan); /* Restore the LED configuration */ ath_led_config(sc); ath_hal_setledstate(ah, HAL_LED_INIT); if (sc->sc_resume_up) { if (ic->ic_opmode == IEEE80211_M_STA) { ath_init(sc); ath_hal_setledstate(ah, HAL_LED_RUN); /* * Program the beacon registers using the last rx'd * beacon frame and enable sync on the next beacon * we see. This should handle the case where we * wakeup and find the same AP and also the case where * we wakeup and need to roam. For the latter we * should get bmiss events that trigger a roam. */ ath_beacon_config(sc, NULL); sc->sc_syncbeacon = 1; } else ieee80211_resume_all(ic); } /* XXX beacons ? */ } void ath_shutdown(struct ath_softc *sc) { struct ifnet *ifp = sc->sc_ifp; DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", __func__, ifp->if_flags); ath_stop(ifp); /* NB: no point powering down chip as we're about to reboot */ } /* * Interrupt handler. Most of the actual processing is deferred. */ void ath_intr(void *arg) { struct ath_softc *sc = arg; struct ifnet *ifp = sc->sc_ifp; struct ath_hal *ah = sc->sc_ah; HAL_INT status = 0; uint32_t txqs; /* * If we're inside a reset path, just print a warning and * clear the ISR. The reset routine will finish it for us. */ ATH_PCU_LOCK(sc); if (sc->sc_inreset_cnt) { HAL_INT status; ath_hal_getisr(ah, &status); /* clear ISR */ ath_hal_intrset(ah, 0); /* disable further intr's */ DPRINTF(sc, ATH_DEBUG_ANY, "%s: in reset, ignoring: status=0x%x\n", __func__, status); ATH_PCU_UNLOCK(sc); return; } if (sc->sc_invalid) { /* * The hardware is not ready/present, don't touch anything. * Note this can happen early on if the IRQ is shared. */ DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid; ignored\n", __func__); ATH_PCU_UNLOCK(sc); return; } if (!ath_hal_intrpend(ah)) { /* shared irq, not for us */ ATH_PCU_UNLOCK(sc); return; } if ((ifp->if_flags & IFF_UP) == 0 || (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { HAL_INT status; DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", __func__, ifp->if_flags); ath_hal_getisr(ah, &status); /* clear ISR */ ath_hal_intrset(ah, 0); /* disable further intr's */ ATH_PCU_UNLOCK(sc); return; } /* * Figure out the reason(s) for the interrupt. Note * that the hal returns a pseudo-ISR that may include * bits we haven't explicitly enabled so we mask the * value to insure we only process bits we requested. */ ath_hal_getisr(ah, &status); /* NB: clears ISR too */ DPRINTF(sc, ATH_DEBUG_INTR, "%s: status 0x%x\n", __func__, status); CTR1(ATH_KTR_INTR, "ath_intr: mask=0x%.8x", status); #ifdef ATH_KTR_INTR_DEBUG CTR5(ATH_KTR_INTR, "ath_intr: ISR=0x%.8x, ISR_S0=0x%.8x, ISR_S1=0x%.8x, ISR_S2=0x%.8x, ISR_S5=0x%.8x", ah->ah_intrstate[0], ah->ah_intrstate[1], ah->ah_intrstate[2], ah->ah_intrstate[3], ah->ah_intrstate[6]); #endif status &= sc->sc_imask; /* discard unasked for bits */ /* Short-circuit un-handled interrupts */ if (status == 0x0) { ATH_PCU_UNLOCK(sc); return; } /* * Take a note that we're inside the interrupt handler, so * the reset routines know to wait. */ sc->sc_intr_cnt++; ATH_PCU_UNLOCK(sc); /* * Handle the interrupt. We won't run concurrent with the reset * or channel change routines as they'll wait for sc_intr_cnt * to be 0 before continuing. */ if (status & HAL_INT_FATAL) { sc->sc_stats.ast_hardware++; ath_hal_intrset(ah, 0); /* disable intr's until reset */ ath_fatal_proc(sc, 0); } else { if (status & HAL_INT_SWBA) { /* * Software beacon alert--time to send a beacon. * Handle beacon transmission directly; deferring * this is too slow to meet timing constraints * under load. */ #ifdef IEEE80211_SUPPORT_TDMA if (sc->sc_tdma) { if (sc->sc_tdmaswba == 0) { struct ieee80211com *ic = ifp->if_l2com; struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); ath_tdma_beacon_send(sc, vap); sc->sc_tdmaswba = vap->iv_tdma->tdma_bintval; } else sc->sc_tdmaswba--; } else #endif { ath_beacon_proc(sc, 0); #ifdef IEEE80211_SUPPORT_SUPERG /* * Schedule the rx taskq in case there's no * traffic so any frames held on the staging * queue are aged and potentially flushed. */ taskqueue_enqueue(sc->sc_tq, &sc->sc_rxtask); #endif } } if (status & HAL_INT_RXEOL) { int imask; CTR0(ATH_KTR_ERR, "ath_intr: RXEOL"); ATH_PCU_LOCK(sc); /* * NB: the hardware should re-read the link when * RXE bit is written, but it doesn't work at * least on older hardware revs. */ sc->sc_stats.ast_rxeol++; /* * Disable RXEOL/RXORN - prevent an interrupt * storm until the PCU logic can be reset. * In case the interface is reset some other * way before "sc_kickpcu" is called, don't * modify sc_imask - that way if it is reset * by a call to ath_reset() somehow, the * interrupt mask will be correctly reprogrammed. */ imask = sc->sc_imask; imask &= ~(HAL_INT_RXEOL | HAL_INT_RXORN); ath_hal_intrset(ah, imask); /* * Only blank sc_rxlink if we've not yet kicked * the PCU. * * This isn't entirely correct - the correct solution * would be to have a PCU lock and engage that for * the duration of the PCU fiddling; which would include * running the RX process. Otherwise we could end up * messing up the RX descriptor chain and making the * RX desc list much shorter. */ if (! sc->sc_kickpcu) sc->sc_rxlink = NULL; sc->sc_kickpcu = 1; /* * Enqueue an RX proc, to handled whatever * is in the RX queue. * This will then kick the PCU. */ taskqueue_enqueue(sc->sc_tq, &sc->sc_rxtask); ATH_PCU_UNLOCK(sc); } if (status & HAL_INT_TXURN) { sc->sc_stats.ast_txurn++; /* bump tx trigger level */ ath_hal_updatetxtriglevel(ah, AH_TRUE); } if (status & HAL_INT_RX) { sc->sc_stats.ast_rx_intr++; taskqueue_enqueue(sc->sc_tq, &sc->sc_rxtask); } if (status & HAL_INT_TX) { sc->sc_stats.ast_tx_intr++; /* * Grab all the currently set bits in the HAL txq bitmap * and blank them. This is the only place we should be * doing this. */ ATH_PCU_LOCK(sc); txqs = 0xffffffff; ath_hal_gettxintrtxqs(sc->sc_ah, &txqs); sc->sc_txq_active |= txqs; taskqueue_enqueue(sc->sc_tq, &sc->sc_txtask); ATH_PCU_UNLOCK(sc); } if (status & HAL_INT_BMISS) { sc->sc_stats.ast_bmiss++; taskqueue_enqueue(sc->sc_tq, &sc->sc_bmisstask); } if (status & HAL_INT_GTT) sc->sc_stats.ast_tx_timeout++; if (status & HAL_INT_CST) sc->sc_stats.ast_tx_cst++; if (status & HAL_INT_MIB) { sc->sc_stats.ast_mib++; ATH_PCU_LOCK(sc); /* * Disable interrupts until we service the MIB * interrupt; otherwise it will continue to fire. */ ath_hal_intrset(ah, 0); /* * Let the hal handle the event. We assume it will * clear whatever condition caused the interrupt. */ ath_hal_mibevent(ah, &sc->sc_halstats); /* * Don't reset the interrupt if we've just * kicked the PCU, or we may get a nested * RXEOL before the rxproc has had a chance * to run. */ if (sc->sc_kickpcu == 0) ath_hal_intrset(ah, sc->sc_imask); ATH_PCU_UNLOCK(sc); } if (status & HAL_INT_RXORN) { /* NB: hal marks HAL_INT_FATAL when RXORN is fatal */ CTR0(ATH_KTR_ERR, "ath_intr: RXORN"); sc->sc_stats.ast_rxorn++; } } ATH_PCU_LOCK(sc); sc->sc_intr_cnt--; ATH_PCU_UNLOCK(sc); } static void ath_fatal_proc(void *arg, int pending) { struct ath_softc *sc = arg; struct ifnet *ifp = sc->sc_ifp; u_int32_t *state; u_int32_t len; void *sp; if_printf(ifp, "hardware error; resetting\n"); /* * Fatal errors are unrecoverable. Typically these * are caused by DMA errors. Collect h/w state from * the hal so we can diagnose what's going on. */ if (ath_hal_getfatalstate(sc->sc_ah, &sp, &len)) { KASSERT(len >= 6*sizeof(u_int32_t), ("len %u bytes", len)); state = sp; if_printf(ifp, "0x%08x 0x%08x 0x%08x, 0x%08x 0x%08x 0x%08x\n", state[0], state[1] , state[2], state[3], state[4], state[5]); } ath_reset(ifp, ATH_RESET_NOLOSS); } static void ath_bmiss_vap(struct ieee80211vap *vap) { /* * Workaround phantom bmiss interrupts by sanity-checking * the time of our last rx'd frame. If it is within the * beacon miss interval then ignore the interrupt. If it's * truly a bmiss we'll get another interrupt soon and that'll * be dispatched up for processing. Note this applies only * for h/w beacon miss events. */ if ((vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) == 0) { struct ifnet *ifp = vap->iv_ic->ic_ifp; struct ath_softc *sc = ifp->if_softc; u_int64_t lastrx = sc->sc_lastrx; u_int64_t tsf = ath_hal_gettsf64(sc->sc_ah); /* XXX should take a locked ref to iv_bss */ u_int bmisstimeout = vap->iv_bmissthreshold * vap->iv_bss->ni_intval * 1024; DPRINTF(sc, ATH_DEBUG_BEACON, "%s: tsf %llu lastrx %lld (%llu) bmiss %u\n", __func__, (unsigned long long) tsf, (unsigned long long)(tsf - lastrx), (unsigned long long) lastrx, bmisstimeout); if (tsf - lastrx <= bmisstimeout) { sc->sc_stats.ast_bmiss_phantom++; return; } } ATH_VAP(vap)->av_bmiss(vap); } static int ath_hal_gethangstate(struct ath_hal *ah, uint32_t mask, uint32_t *hangs) { uint32_t rsize; void *sp; if (!ath_hal_getdiagstate(ah, HAL_DIAG_CHECK_HANGS, &mask, sizeof(mask), &sp, &rsize)) return 0; KASSERT(rsize == sizeof(uint32_t), ("resultsize %u", rsize)); *hangs = *(uint32_t *)sp; return 1; } static void ath_bmiss_proc(void *arg, int pending) { struct ath_softc *sc = arg; struct ifnet *ifp = sc->sc_ifp; uint32_t hangs; DPRINTF(sc, ATH_DEBUG_ANY, "%s: pending %u\n", __func__, pending); if (ath_hal_gethangstate(sc->sc_ah, 0xff, &hangs) && hangs != 0) { if_printf(ifp, "bb hang detected (0x%x), resetting\n", hangs); ath_reset(ifp, ATH_RESET_NOLOSS); } else ieee80211_beacon_miss(ifp->if_l2com); } /* * Handle TKIP MIC setup to deal hardware that doesn't do MIC * calcs together with WME. If necessary disable the crypto * hardware and mark the 802.11 state so keys will be setup * with the MIC work done in software. */ static void ath_settkipmic(struct ath_softc *sc) { struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; if ((ic->ic_cryptocaps & IEEE80211_CRYPTO_TKIP) && !sc->sc_wmetkipmic) { if (ic->ic_flags & IEEE80211_F_WME) { ath_hal_settkipmic(sc->sc_ah, AH_FALSE); ic->ic_cryptocaps &= ~IEEE80211_CRYPTO_TKIPMIC; } else { ath_hal_settkipmic(sc->sc_ah, AH_TRUE); ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIPMIC; } } } static void ath_init(void *arg) { struct ath_softc *sc = (struct ath_softc *) arg; struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; struct ath_hal *ah = sc->sc_ah; HAL_STATUS status; DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", __func__, ifp->if_flags); ATH_LOCK(sc); /* * Stop anything previously setup. This is safe * whether this is the first time through or not. */ ath_stop_locked(ifp); /* * The basic interface to setting the hardware in a good * state is ``reset''. On return the hardware is known to * be powered up and with interrupts disabled. This must * be followed by initialization of the appropriate bits * and then setup of the interrupt mask. */ ath_settkipmic(sc); if (!ath_hal_reset(ah, sc->sc_opmode, ic->ic_curchan, AH_FALSE, &status)) { if_printf(ifp, "unable to reset hardware; hal status %u\n", status); ATH_UNLOCK(sc); return; } ath_chan_change(sc, ic->ic_curchan); /* Let DFS at it in case it's a DFS channel */ ath_dfs_radar_enable(sc, ic->ic_curchan); /* * Likewise this is set during reset so update * state cached in the driver. */ sc->sc_diversity = ath_hal_getdiversity(ah); sc->sc_lastlongcal = 0; sc->sc_resetcal = 1; sc->sc_lastcalreset = 0; sc->sc_lastani = 0; sc->sc_lastshortcal = 0; sc->sc_doresetcal = AH_FALSE; /* * Beacon timers were cleared here; give ath_newstate() * a hint that the beacon timers should be poked when * things transition to the RUN state. */ sc->sc_beacons = 0; /* * Initial aggregation settings. */ sc->sc_hwq_limit = ATH_AGGR_MIN_QDEPTH; sc->sc_tid_hwq_lo = ATH_AGGR_SCHED_LOW; sc->sc_tid_hwq_hi = ATH_AGGR_SCHED_HIGH; /* * Setup the hardware after reset: the key cache * is filled as needed and the receive engine is * set going. Frame transmit is handled entirely * in the frame output path; there's nothing to do * here except setup the interrupt mask. */ if (ath_startrecv(sc) != 0) { if_printf(ifp, "unable to start recv logic\n"); ATH_UNLOCK(sc); return; } /* * Enable interrupts. */ sc->sc_imask = HAL_INT_RX | HAL_INT_TX | HAL_INT_RXEOL | HAL_INT_RXORN | HAL_INT_FATAL | HAL_INT_GLOBAL; /* * Enable MIB interrupts when there are hardware phy counters. * Note we only do this (at the moment) for station mode. */ if (sc->sc_needmib && ic->ic_opmode == IEEE80211_M_STA) sc->sc_imask |= HAL_INT_MIB; /* Enable global TX timeout and carrier sense timeout if available */ if (ath_hal_gtxto_supported(ah)) sc->sc_imask |= HAL_INT_GTT; DPRINTF(sc, ATH_DEBUG_RESET, "%s: imask=0x%x\n", __func__, sc->sc_imask); ifp->if_drv_flags |= IFF_DRV_RUNNING; callout_reset(&sc->sc_wd_ch, hz, ath_watchdog, sc); ath_hal_intrset(ah, sc->sc_imask); ATH_UNLOCK(sc); #ifdef ATH_TX99_DIAG if (sc->sc_tx99 != NULL) sc->sc_tx99->start(sc->sc_tx99); else #endif ieee80211_start_all(ic); /* start all vap's */ } static void ath_stop_locked(struct ifnet *ifp) { struct ath_softc *sc = ifp->if_softc; struct ath_hal *ah = sc->sc_ah; DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid %u if_flags 0x%x\n", __func__, sc->sc_invalid, ifp->if_flags); ATH_LOCK_ASSERT(sc); if (ifp->if_drv_flags & IFF_DRV_RUNNING) { /* * Shutdown the hardware and driver: * reset 802.11 state machine * turn off timers * disable interrupts * turn off the radio * clear transmit machinery * clear receive machinery * drain and release tx queues * reclaim beacon resources * power down hardware * * Note that some of this work is not possible if the * hardware is gone (invalid). */ #ifdef ATH_TX99_DIAG if (sc->sc_tx99 != NULL) sc->sc_tx99->stop(sc->sc_tx99); #endif callout_stop(&sc->sc_wd_ch); sc->sc_wd_timer = 0; ifp->if_drv_flags &= ~IFF_DRV_RUNNING; if (!sc->sc_invalid) { if (sc->sc_softled) { callout_stop(&sc->sc_ledtimer); ath_hal_gpioset(ah, sc->sc_ledpin, !sc->sc_ledon); sc->sc_blinking = 0; } ath_hal_intrset(ah, 0); } ath_draintxq(sc, ATH_RESET_DEFAULT); if (!sc->sc_invalid) { ath_stoprecv(sc, 1); ath_hal_phydisable(ah); } else sc->sc_rxlink = NULL; ath_beacon_free(sc); /* XXX not needed */ } } #define MAX_TXRX_ITERATIONS 1000 static void ath_txrx_stop_locked(struct ath_softc *sc) { int i = MAX_TXRX_ITERATIONS; ATH_UNLOCK_ASSERT(sc); ATH_PCU_LOCK_ASSERT(sc); /* * Sleep until all the pending operations have completed. * * The caller must ensure that reset has been incremented * or the pending operations may continue being queued. */ while (sc->sc_rxproc_cnt || sc->sc_txproc_cnt || sc->sc_txstart_cnt || sc->sc_intr_cnt) { if (i <= 0) break; msleep(sc, &sc->sc_pcu_mtx, 0, "ath_txrx_stop", 1); i--; } if (i <= 0) device_printf(sc->sc_dev, "%s: didn't finish after %d iterations\n", __func__, MAX_TXRX_ITERATIONS); } #undef MAX_TXRX_ITERATIONS #if 0 static void ath_txrx_stop(struct ath_softc *sc) { ATH_UNLOCK_ASSERT(sc); ATH_PCU_UNLOCK_ASSERT(sc); ATH_PCU_LOCK(sc); ath_txrx_stop_locked(sc); ATH_PCU_UNLOCK(sc); } #endif static void ath_txrx_start(struct ath_softc *sc) { taskqueue_unblock(sc->sc_tq); } /* * Grab the reset lock, and wait around until noone else * is trying to do anything with it. * * This is totally horrible but we can't hold this lock for * long enough to do TX/RX or we end up with net80211/ip stack * LORs and eventual deadlock. * * "dowait" signals whether to spin, waiting for the reset * lock count to reach 0. This should (for now) only be used * during the reset path, as the rest of the code may not * be locking-reentrant enough to behave correctly. * * Another, cleaner way should be found to serialise all of * these operations. */ #define MAX_RESET_ITERATIONS 10 static int ath_reset_grablock(struct ath_softc *sc, int dowait) { int w = 0; int i = MAX_RESET_ITERATIONS; ATH_PCU_LOCK_ASSERT(sc); do { if (sc->sc_inreset_cnt == 0) { w = 1; break; } if (dowait == 0) { w = 0; break; } ATH_PCU_UNLOCK(sc); pause("ath_reset_grablock", 1); i--; ATH_PCU_LOCK(sc); } while (i > 0); /* * We always increment the refcounter, regardless * of whether we succeeded to get it in an exclusive * way. */ sc->sc_inreset_cnt++; if (i <= 0) device_printf(sc->sc_dev, "%s: didn't finish after %d iterations\n", __func__, MAX_RESET_ITERATIONS); if (w == 0) device_printf(sc->sc_dev, "%s: warning, recursive reset path!\n", __func__); return w; } #undef MAX_RESET_ITERATIONS /* * XXX TODO: write ath_reset_releaselock */ static void ath_stop(struct ifnet *ifp) { struct ath_softc *sc = ifp->if_softc; ATH_LOCK(sc); ath_stop_locked(ifp); ATH_UNLOCK(sc); } /* * Reset the hardware w/o losing operational state. This is * basically a more efficient way of doing ath_stop, ath_init, * followed by state transitions to the current 802.11 * operational state. Used to recover from various errors and * to reset or reload hardware state. */ int ath_reset(struct ifnet *ifp, ATH_RESET_TYPE reset_type) { struct ath_softc *sc = ifp->if_softc; struct ieee80211com *ic = ifp->if_l2com; struct ath_hal *ah = sc->sc_ah; HAL_STATUS status; int i; DPRINTF(sc, ATH_DEBUG_RESET, "%s: called\n", __func__); /* Ensure ATH_LOCK isn't held; ath_rx_proc can't be locked */ ATH_PCU_UNLOCK_ASSERT(sc); ATH_UNLOCK_ASSERT(sc); /* Try to (stop any further TX/RX from occuring */ taskqueue_block(sc->sc_tq); ATH_PCU_LOCK(sc); ath_hal_intrset(ah, 0); /* disable interrupts */ ath_txrx_stop_locked(sc); /* Ensure TX/RX is stopped */ if (ath_reset_grablock(sc, 1) == 0) { device_printf(sc->sc_dev, "%s: concurrent reset! Danger!\n", __func__); } ATH_PCU_UNLOCK(sc); /* * Should now wait for pending TX/RX to complete * and block future ones from occuring. This needs to be * done before the TX queue is drained. */ ath_draintxq(sc, reset_type); /* stop xmit side */ /* * Regardless of whether we're doing a no-loss flush or * not, stop the PCU and handle what's in the RX queue. * That way frames aren't dropped which shouldn't be. */ ath_stoprecv(sc, (reset_type != ATH_RESET_NOLOSS)); ath_rx_proc(sc, 0); ath_settkipmic(sc); /* configure TKIP MIC handling */ /* NB: indicate channel change so we do a full reset */ if (!ath_hal_reset(ah, sc->sc_opmode, ic->ic_curchan, AH_TRUE, &status)) if_printf(ifp, "%s: unable to reset hardware; hal status %u\n", __func__, status); sc->sc_diversity = ath_hal_getdiversity(ah); /* Let DFS at it in case it's a DFS channel */ ath_dfs_radar_enable(sc, ic->ic_curchan); if (ath_startrecv(sc) != 0) /* restart recv */ if_printf(ifp, "%s: unable to start recv logic\n", __func__); /* * We may be doing a reset in response to an ioctl * that changes the channel so update any state that * might change as a result. */ ath_chan_change(sc, ic->ic_curchan); if (sc->sc_beacons) { /* restart beacons */ #ifdef IEEE80211_SUPPORT_TDMA if (sc->sc_tdma) ath_tdma_config(sc, NULL); else #endif ath_beacon_config(sc, NULL); } /* * Release the reset lock and re-enable interrupts here. * If an interrupt was being processed in ath_intr(), * it would disable interrupts at this point. So we have * to atomically enable interrupts and decrement the * reset counter - this way ath_intr() doesn't end up * disabling interrupts without a corresponding enable * in the rest or channel change path. */ ATH_PCU_LOCK(sc); sc->sc_inreset_cnt--; /* XXX only do this if sc_inreset_cnt == 0? */ ath_hal_intrset(ah, sc->sc_imask); ATH_PCU_UNLOCK(sc); /* * TX and RX can be started here. If it were started with * sc_inreset_cnt > 0, the TX and RX path would abort. * Thus if this is a nested call through the reset or * channel change code, TX completion will occur but * RX completion and ath_start / ath_tx_start will not * run. */ /* Restart TX/RX as needed */ ath_txrx_start(sc); /* XXX Restart TX completion and pending TX */ if (reset_type == ATH_RESET_NOLOSS) { for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { if (ATH_TXQ_SETUP(sc, i)) { ATH_TXQ_LOCK(&sc->sc_txq[i]); ath_txq_restart_dma(sc, &sc->sc_txq[i]); ath_txq_sched(sc, &sc->sc_txq[i]); ATH_TXQ_UNLOCK(&sc->sc_txq[i]); } } } /* * This may have been set during an ath_start() call which * set this once it detected a concurrent TX was going on. * So, clear it. */ IF_LOCK(&ifp->if_snd); ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; IF_UNLOCK(&ifp->if_snd); /* Handle any frames in the TX queue */ /* * XXX should this be done by the caller, rather than * ath_reset() ? */ ath_start(ifp); /* restart xmit */ return 0; } static int ath_reset_vap(struct ieee80211vap *vap, u_long cmd) { struct ieee80211com *ic = vap->iv_ic; struct ifnet *ifp = ic->ic_ifp; struct ath_softc *sc = ifp->if_softc; struct ath_hal *ah = sc->sc_ah; switch (cmd) { case IEEE80211_IOC_TXPOWER: /* * If per-packet TPC is enabled, then we have nothing * to do; otherwise we need to force the global limit. * All this can happen directly; no need to reset. */ if (!ath_hal_gettpc(ah)) ath_hal_settxpowlimit(ah, ic->ic_txpowlimit); return 0; } /* XXX? Full or NOLOSS? */ return ath_reset(ifp, ATH_RESET_FULL); } struct ath_buf * _ath_getbuf_locked(struct ath_softc *sc) { struct ath_buf *bf; ATH_TXBUF_LOCK_ASSERT(sc); bf = TAILQ_FIRST(&sc->sc_txbuf); if (bf == NULL) { sc->sc_stats.ast_tx_getnobuf++; } else { if (bf->bf_flags & ATH_BUF_BUSY) { sc->sc_stats.ast_tx_getbusybuf++; bf = NULL; } } if (bf != NULL && (bf->bf_flags & ATH_BUF_BUSY) == 0) TAILQ_REMOVE(&sc->sc_txbuf, bf, bf_list); else bf = NULL; if (bf == NULL) { DPRINTF(sc, ATH_DEBUG_XMIT, "%s: %s\n", __func__, TAILQ_FIRST(&sc->sc_txbuf) == NULL ? "out of xmit buffers" : "xmit buffer busy"); return NULL; } /* Valid bf here; clear some basic fields */ bf->bf_next = NULL; /* XXX just to be sure */ bf->bf_last = NULL; /* XXX again, just to be sure */ bf->bf_comp = NULL; /* XXX again, just to be sure */ bzero(&bf->bf_state, sizeof(bf->bf_state)); return bf; } /* * When retrying a software frame, buffers marked ATH_BUF_BUSY * can't be thrown back on the queue as they could still be * in use by the hardware. * * This duplicates the buffer, or returns NULL. * * The descriptor is also copied but the link pointers and * the DMA segments aren't copied; this frame should thus * be again passed through the descriptor setup/chain routines * so the link is correct. * * The caller must free the buffer using ath_freebuf(). * * XXX TODO: this call shouldn't fail as it'll cause packet loss * XXX in the TX pathway when retries are needed. * XXX Figure out how to keep some buffers free, or factor the * XXX number of busy buffers into the xmit path (ath_start()) * XXX so we don't over-commit. */ struct ath_buf * ath_buf_clone(struct ath_softc *sc, const struct ath_buf *bf) { struct ath_buf *tbf; tbf = ath_getbuf(sc); if (tbf == NULL) return NULL; /* XXX failure? Why? */ /* Copy basics */ tbf->bf_next = NULL; tbf->bf_nseg = bf->bf_nseg; tbf->bf_txflags = bf->bf_txflags; tbf->bf_flags = bf->bf_flags & ~ATH_BUF_BUSY; tbf->bf_status = bf->bf_status; tbf->bf_m = bf->bf_m; tbf->bf_node = bf->bf_node; /* will be setup by the chain/setup function */ tbf->bf_lastds = NULL; /* for now, last == self */ tbf->bf_last = tbf; tbf->bf_comp = bf->bf_comp; /* NOTE: DMA segments will be setup by the setup/chain functions */ /* The caller has to re-init the descriptor + links */ /* Copy state */ memcpy(&tbf->bf_state, &bf->bf_state, sizeof(bf->bf_state)); return tbf; } struct ath_buf * ath_getbuf(struct ath_softc *sc) { struct ath_buf *bf; ATH_TXBUF_LOCK(sc); bf = _ath_getbuf_locked(sc); ATH_TXBUF_UNLOCK(sc); if (bf == NULL) { struct ifnet *ifp = sc->sc_ifp; DPRINTF(sc, ATH_DEBUG_XMIT, "%s: stop queue\n", __func__); sc->sc_stats.ast_tx_qstop++; IF_LOCK(&ifp->if_snd); ifp->if_drv_flags |= IFF_DRV_OACTIVE; IF_UNLOCK(&ifp->if_snd); } return bf; } static void ath_start(struct ifnet *ifp) { struct ath_softc *sc = ifp->if_softc; struct ieee80211_node *ni; struct ath_buf *bf; struct mbuf *m, *next; ath_bufhead frags; if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) return; /* XXX is it ok to hold the ATH_LOCK here? */ ATH_PCU_LOCK(sc); if (sc->sc_inreset_cnt > 0) { device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", __func__); ATH_PCU_UNLOCK(sc); IF_LOCK(&ifp->if_snd); ifp->if_drv_flags |= IFF_DRV_OACTIVE; IF_UNLOCK(&ifp->if_snd); return; } sc->sc_txstart_cnt++; ATH_PCU_UNLOCK(sc); for (;;) { /* * Grab a TX buffer and associated resources. */ bf = ath_getbuf(sc); if (bf == NULL) break; IFQ_DEQUEUE(&ifp->if_snd, m); if (m == NULL) { ATH_TXBUF_LOCK(sc); TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); ATH_TXBUF_UNLOCK(sc); break; } ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; /* * Check for fragmentation. If this frame * has been broken up verify we have enough * buffers to send all the fragments so all * go out or none... */ TAILQ_INIT(&frags); if ((m->m_flags & M_FRAG) && !ath_txfrag_setup(sc, &frags, m, ni)) { DPRINTF(sc, ATH_DEBUG_XMIT, "%s: out of txfrag buffers\n", __func__); sc->sc_stats.ast_tx_nofrag++; ifp->if_oerrors++; ath_freetx(m); goto bad; } ifp->if_opackets++; nextfrag: /* * Pass the frame to the h/w for transmission. * Fragmented frames have each frag chained together * with m_nextpkt. We know there are sufficient ath_buf's * to send all the frags because of work done by * ath_txfrag_setup. We leave m_nextpkt set while * calling ath_tx_start so it can use it to extend the * the tx duration to cover the subsequent frag and * so it can reclaim all the mbufs in case of an error; * ath_tx_start clears m_nextpkt once it commits to * handing the frame to the hardware. */ next = m->m_nextpkt; if (ath_tx_start(sc, ni, bf, m)) { bad: ifp->if_oerrors++; reclaim: bf->bf_m = NULL; bf->bf_node = NULL; ATH_TXBUF_LOCK(sc); TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); ath_txfrag_cleanup(sc, &frags, ni); ATH_TXBUF_UNLOCK(sc); if (ni != NULL) ieee80211_free_node(ni); continue; } if (next != NULL) { /* * Beware of state changing between frags. * XXX check sta power-save state? */ if (ni->ni_vap->iv_state != IEEE80211_S_RUN) { DPRINTF(sc, ATH_DEBUG_XMIT, "%s: flush fragmented packet, state %s\n", __func__, ieee80211_state_name[ni->ni_vap->iv_state]); ath_freetx(next); goto reclaim; } m = next; bf = TAILQ_FIRST(&frags); KASSERT(bf != NULL, ("no buf for txfrag")); TAILQ_REMOVE(&frags, bf, bf_list); goto nextfrag; } sc->sc_wd_timer = 5; } ATH_PCU_LOCK(sc); sc->sc_txstart_cnt--; ATH_PCU_UNLOCK(sc); } static int ath_media_change(struct ifnet *ifp) { int error = ieee80211_media_change(ifp); /* NB: only the fixed rate can change and that doesn't need a reset */ return (error == ENETRESET ? 0 : error); } /* * Block/unblock tx+rx processing while a key change is done. * We assume the caller serializes key management operations * so we only need to worry about synchronization with other * uses that originate in the driver. */ static void ath_key_update_begin(struct ieee80211vap *vap) { struct ifnet *ifp = vap->iv_ic->ic_ifp; struct ath_softc *sc = ifp->if_softc; DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); taskqueue_block(sc->sc_tq); IF_LOCK(&ifp->if_snd); /* NB: doesn't block mgmt frames */ } static void ath_key_update_end(struct ieee80211vap *vap) { struct ifnet *ifp = vap->iv_ic->ic_ifp; struct ath_softc *sc = ifp->if_softc; DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); IF_UNLOCK(&ifp->if_snd); taskqueue_unblock(sc->sc_tq); } /* * Calculate the receive filter according to the * operating mode and state: * * o always accept unicast, broadcast, and multicast traffic * o accept PHY error frames when hardware doesn't have MIB support * to count and we need them for ANI (sta mode only until recently) * and we are not scanning (ANI is disabled) * NB: older hal's add rx filter bits out of sight and we need to * blindly preserve them * o probe request frames are accepted only when operating in * hostap, adhoc, mesh, or monitor modes * o enable promiscuous mode * - when in monitor mode * - if interface marked PROMISC (assumes bridge setting is filtered) * o accept beacons: * - when operating in station mode for collecting rssi data when * the station is otherwise quiet, or * - when operating in adhoc mode so the 802.11 layer creates * node table entries for peers, * - when scanning * - when doing s/w beacon miss (e.g. for ap+sta) * - when operating in ap mode in 11g to detect overlapping bss that * require protection * - when operating in mesh mode to detect neighbors * o accept control frames: * - when in monitor mode * XXX HT protection for 11n */ static u_int32_t ath_calcrxfilter(struct ath_softc *sc) { struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; u_int32_t rfilt; rfilt = HAL_RX_FILTER_UCAST | HAL_RX_FILTER_BCAST | HAL_RX_FILTER_MCAST; if (!sc->sc_needmib && !sc->sc_scanning) rfilt |= HAL_RX_FILTER_PHYERR; if (ic->ic_opmode != IEEE80211_M_STA) rfilt |= HAL_RX_FILTER_PROBEREQ; /* XXX ic->ic_monvaps != 0? */ if (ic->ic_opmode == IEEE80211_M_MONITOR || (ifp->if_flags & IFF_PROMISC)) rfilt |= HAL_RX_FILTER_PROM; if (ic->ic_opmode == IEEE80211_M_STA || ic->ic_opmode == IEEE80211_M_IBSS || sc->sc_swbmiss || sc->sc_scanning) rfilt |= HAL_RX_FILTER_BEACON; /* * NB: We don't recalculate the rx filter when * ic_protmode changes; otherwise we could do * this only when ic_protmode != NONE. */ if (ic->ic_opmode == IEEE80211_M_HOSTAP && IEEE80211_IS_CHAN_ANYG(ic->ic_curchan)) rfilt |= HAL_RX_FILTER_BEACON; /* * Enable hardware PS-POLL RX only for hostap mode; * STA mode sends PS-POLL frames but never * receives them. */ if (ath_hal_getcapability(sc->sc_ah, HAL_CAP_PSPOLL, 0, NULL) == HAL_OK && ic->ic_opmode == IEEE80211_M_HOSTAP) rfilt |= HAL_RX_FILTER_PSPOLL; if (sc->sc_nmeshvaps) { rfilt |= HAL_RX_FILTER_BEACON; if (sc->sc_hasbmatch) rfilt |= HAL_RX_FILTER_BSSID; else rfilt |= HAL_RX_FILTER_PROM; } if (ic->ic_opmode == IEEE80211_M_MONITOR) rfilt |= HAL_RX_FILTER_CONTROL; /* * Enable RX of compressed BAR frames only when doing * 802.11n. Required for A-MPDU. */ if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) rfilt |= HAL_RX_FILTER_COMPBAR; /* * Enable radar PHY errors if requested by the * DFS module. */ if (sc->sc_dodfs) rfilt |= HAL_RX_FILTER_PHYRADAR; DPRINTF(sc, ATH_DEBUG_MODE, "%s: RX filter 0x%x, %s if_flags 0x%x\n", __func__, rfilt, ieee80211_opmode_name[ic->ic_opmode], ifp->if_flags); return rfilt; } static void ath_update_promisc(struct ifnet *ifp) { struct ath_softc *sc = ifp->if_softc; u_int32_t rfilt; /* configure rx filter */ rfilt = ath_calcrxfilter(sc); ath_hal_setrxfilter(sc->sc_ah, rfilt); DPRINTF(sc, ATH_DEBUG_MODE, "%s: RX filter 0x%x\n", __func__, rfilt); } static void ath_update_mcast(struct ifnet *ifp) { struct ath_softc *sc = ifp->if_softc; u_int32_t mfilt[2]; /* calculate and install multicast filter */ if ((ifp->if_flags & IFF_ALLMULTI) == 0) { struct ifmultiaddr *ifma; /* * Merge multicast addresses to form the hardware filter. */ mfilt[0] = mfilt[1] = 0; if_maddr_rlock(ifp); /* XXX need some fiddling to remove? */ TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { caddr_t dl; u_int32_t val; u_int8_t pos; /* calculate XOR of eight 6bit values */ dl = LLADDR((struct sockaddr_dl *) ifma->ifma_addr); val = LE_READ_4(dl + 0); pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; val = LE_READ_4(dl + 3); pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; pos &= 0x3f; mfilt[pos / 32] |= (1 << (pos % 32)); } if_maddr_runlock(ifp); } else mfilt[0] = mfilt[1] = ~0; ath_hal_setmcastfilter(sc->sc_ah, mfilt[0], mfilt[1]); DPRINTF(sc, ATH_DEBUG_MODE, "%s: MC filter %08x:%08x\n", __func__, mfilt[0], mfilt[1]); } static void ath_mode_init(struct ath_softc *sc) { struct ifnet *ifp = sc->sc_ifp; struct ath_hal *ah = sc->sc_ah; u_int32_t rfilt; /* configure rx filter */ rfilt = ath_calcrxfilter(sc); ath_hal_setrxfilter(ah, rfilt); /* configure operational mode */ ath_hal_setopmode(ah); /* handle any link-level address change */ ath_hal_setmac(ah, IF_LLADDR(ifp)); /* calculate and install multicast filter */ ath_update_mcast(ifp); } /* * Set the slot time based on the current setting. */ static void ath_setslottime(struct ath_softc *sc) { struct ieee80211com *ic = sc->sc_ifp->if_l2com; struct ath_hal *ah = sc->sc_ah; u_int usec; if (IEEE80211_IS_CHAN_HALF(ic->ic_curchan)) usec = 13; else if (IEEE80211_IS_CHAN_QUARTER(ic->ic_curchan)) usec = 21; else if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan)) { /* honor short/long slot time only in 11g */ /* XXX shouldn't honor on pure g or turbo g channel */ if (ic->ic_flags & IEEE80211_F_SHSLOT) usec = HAL_SLOT_TIME_9; else usec = HAL_SLOT_TIME_20; } else usec = HAL_SLOT_TIME_9; DPRINTF(sc, ATH_DEBUG_RESET, "%s: chan %u MHz flags 0x%x %s slot, %u usec\n", __func__, ic->ic_curchan->ic_freq, ic->ic_curchan->ic_flags, ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", usec); ath_hal_setslottime(ah, usec); sc->sc_updateslot = OK; } /* * Callback from the 802.11 layer to update the * slot time based on the current setting. */ static void ath_updateslot(struct ifnet *ifp) { struct ath_softc *sc = ifp->if_softc; struct ieee80211com *ic = ifp->if_l2com; /* * When not coordinating the BSS, change the hardware * immediately. For other operation we defer the change * until beacon updates have propagated to the stations. */ if (ic->ic_opmode == IEEE80211_M_HOSTAP || ic->ic_opmode == IEEE80211_M_MBSS) sc->sc_updateslot = UPDATE; else ath_setslottime(sc); } /* * Setup a h/w transmit queue for beacons. */ static int ath_beaconq_setup(struct ath_hal *ah) { HAL_TXQ_INFO qi; memset(&qi, 0, sizeof(qi)); qi.tqi_aifs = HAL_TXQ_USEDEFAULT; qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; /* NB: for dynamic turbo, don't enable any other interrupts */ qi.tqi_qflags = HAL_TXQ_TXDESCINT_ENABLE; return ath_hal_setuptxqueue(ah, HAL_TX_QUEUE_BEACON, &qi); } /* * Setup the transmit queue parameters for the beacon queue. */ static int ath_beaconq_config(struct ath_softc *sc) { #define ATH_EXPONENT_TO_VALUE(v) ((1<<(v))-1) struct ieee80211com *ic = sc->sc_ifp->if_l2com; struct ath_hal *ah = sc->sc_ah; HAL_TXQ_INFO qi; ath_hal_gettxqueueprops(ah, sc->sc_bhalq, &qi); if (ic->ic_opmode == IEEE80211_M_HOSTAP || ic->ic_opmode == IEEE80211_M_MBSS) { /* * Always burst out beacon and CAB traffic. */ qi.tqi_aifs = ATH_BEACON_AIFS_DEFAULT; qi.tqi_cwmin = ATH_BEACON_CWMIN_DEFAULT; qi.tqi_cwmax = ATH_BEACON_CWMAX_DEFAULT; } else { struct wmeParams *wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[WME_AC_BE]; /* * Adhoc mode; important thing is to use 2x cwmin. */ qi.tqi_aifs = wmep->wmep_aifsn; qi.tqi_cwmin = 2*ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); } if (!ath_hal_settxqueueprops(ah, sc->sc_bhalq, &qi)) { device_printf(sc->sc_dev, "unable to update parameters for " "beacon hardware queue!\n"); return 0; } else { ath_hal_resettxqueue(ah, sc->sc_bhalq); /* push to h/w */ return 1; } #undef ATH_EXPONENT_TO_VALUE } /* * Allocate and setup an initial beacon frame. */ static int ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ath_vap *avp = ATH_VAP(vap); struct ath_buf *bf; struct mbuf *m; int error; bf = avp->av_bcbuf; DPRINTF(sc, ATH_DEBUG_NODE, "%s: bf_m=%p, bf_node=%p\n", __func__, bf->bf_m, bf->bf_node); if (bf->bf_m != NULL) { bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); m_freem(bf->bf_m); bf->bf_m = NULL; } if (bf->bf_node != NULL) { ieee80211_free_node(bf->bf_node); bf->bf_node = NULL; } /* * NB: the beacon data buffer must be 32-bit aligned; * we assume the mbuf routines will return us something * with this alignment (perhaps should assert). */ m = ieee80211_beacon_alloc(ni, &avp->av_boff); if (m == NULL) { device_printf(sc->sc_dev, "%s: cannot get mbuf\n", __func__); sc->sc_stats.ast_be_nombuf++; return ENOMEM; } error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, bf->bf_segs, &bf->bf_nseg, BUS_DMA_NOWAIT); if (error != 0) { device_printf(sc->sc_dev, "%s: cannot map mbuf, bus_dmamap_load_mbuf_sg returns %d\n", __func__, error); m_freem(m); return error; } /* * Calculate a TSF adjustment factor required for staggered * beacons. Note that we assume the format of the beacon * frame leaves the tstamp field immediately following the * header. */ if (sc->sc_stagbeacons && avp->av_bslot > 0) { uint64_t tsfadjust; struct ieee80211_frame *wh; /* * The beacon interval is in TU's; the TSF is in usecs. * We figure out how many TU's to add to align the timestamp * then convert to TSF units and handle byte swapping before * inserting it in the frame. The hardware will then add this * each time a beacon frame is sent. Note that we align vap's * 1..N and leave vap 0 untouched. This means vap 0 has a * timestamp in one beacon interval while the others get a * timstamp aligned to the next interval. */ tsfadjust = ni->ni_intval * (ATH_BCBUF - avp->av_bslot) / ATH_BCBUF; tsfadjust = htole64(tsfadjust << 10); /* TU -> TSF */ DPRINTF(sc, ATH_DEBUG_BEACON, "%s: %s beacons bslot %d intval %u tsfadjust %llu\n", __func__, sc->sc_stagbeacons ? "stagger" : "burst", avp->av_bslot, ni->ni_intval, (long long unsigned) le64toh(tsfadjust)); wh = mtod(m, struct ieee80211_frame *); memcpy(&wh[1], &tsfadjust, sizeof(tsfadjust)); } bf->bf_m = m; bf->bf_node = ieee80211_ref_node(ni); return 0; } /* * Setup the beacon frame for transmit. */ static void ath_beacon_setup(struct ath_softc *sc, struct ath_buf *bf) { #define USE_SHPREAMBLE(_ic) \ (((_ic)->ic_flags & (IEEE80211_F_SHPREAMBLE | IEEE80211_F_USEBARKER))\ == IEEE80211_F_SHPREAMBLE) struct ieee80211_node *ni = bf->bf_node; struct ieee80211com *ic = ni->ni_ic; struct mbuf *m = bf->bf_m; struct ath_hal *ah = sc->sc_ah; struct ath_desc *ds; int flags, antenna; const HAL_RATE_TABLE *rt; u_int8_t rix, rate; DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: m %p len %u\n", __func__, m, m->m_len); /* setup descriptors */ ds = bf->bf_desc; bf->bf_last = bf; bf->bf_lastds = ds; flags = HAL_TXDESC_NOACK; if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) { ds->ds_link = bf->bf_daddr; /* self-linked */ flags |= HAL_TXDESC_VEOL; /* * Let hardware handle antenna switching. */ antenna = sc->sc_txantenna; } else { ds->ds_link = 0; /* * Switch antenna every 4 beacons. * XXX assumes two antenna */ if (sc->sc_txantenna != 0) antenna = sc->sc_txantenna; else if (sc->sc_stagbeacons && sc->sc_nbcnvaps != 0) antenna = ((sc->sc_stats.ast_be_xmit / sc->sc_nbcnvaps) & 4 ? 2 : 1); else antenna = (sc->sc_stats.ast_be_xmit & 4 ? 2 : 1); } KASSERT(bf->bf_nseg == 1, ("multi-segment beacon frame; nseg %u", bf->bf_nseg)); ds->ds_data = bf->bf_segs[0].ds_addr; /* * Calculate rate code. * XXX everything at min xmit rate */ rix = 0; rt = sc->sc_currates; rate = rt->info[rix].rateCode; if (USE_SHPREAMBLE(ic)) rate |= rt->info[rix].shortPreamble; ath_hal_setuptxdesc(ah, ds , m->m_len + IEEE80211_CRC_LEN /* frame length */ , sizeof(struct ieee80211_frame)/* header length */ , HAL_PKT_TYPE_BEACON /* Atheros packet type */ , ni->ni_txpower /* txpower XXX */ , rate, 1 /* series 0 rate/tries */ , HAL_TXKEYIX_INVALID /* no encryption */ , antenna /* antenna mode */ , flags /* no ack, veol for beacons */ , 0 /* rts/cts rate */ , 0 /* rts/cts duration */ ); /* NB: beacon's BufLen must be a multiple of 4 bytes */ ath_hal_filltxdesc(ah, ds , roundup(m->m_len, 4) /* buffer length */ , AH_TRUE /* first segment */ , AH_TRUE /* last segment */ , ds /* first descriptor */ ); #if 0 ath_desc_swap(ds); #endif #undef USE_SHPREAMBLE } static void ath_beacon_update(struct ieee80211vap *vap, int item) { struct ieee80211_beacon_offsets *bo = &ATH_VAP(vap)->av_boff; setbit(bo->bo_flags, item); } /* * Append the contents of src to dst; both queues * are assumed to be locked. */ static void ath_txqmove(struct ath_txq *dst, struct ath_txq *src) { ATH_TXQ_LOCK_ASSERT(dst); ATH_TXQ_LOCK_ASSERT(src); TAILQ_CONCAT(&dst->axq_q, &src->axq_q, bf_list); dst->axq_link = src->axq_link; src->axq_link = NULL; dst->axq_depth += src->axq_depth; dst->axq_aggr_depth += src->axq_aggr_depth; src->axq_depth = 0; src->axq_aggr_depth = 0; } /* * Transmit a beacon frame at SWBA. Dynamic updates to the * frame contents are done as needed and the slot time is * also adjusted based on current state. */ static void ath_beacon_proc(void *arg, int pending) { struct ath_softc *sc = arg; struct ath_hal *ah = sc->sc_ah; struct ieee80211vap *vap; struct ath_buf *bf; int slot, otherant; uint32_t bfaddr; DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: pending %u\n", __func__, pending); /* * Check if the previous beacon has gone out. If * not don't try to post another, skip this period * and wait for the next. Missed beacons indicate * a problem and should not occur. If we miss too * many consecutive beacons reset the device. */ if (ath_hal_numtxpending(ah, sc->sc_bhalq) != 0) { sc->sc_bmisscount++; sc->sc_stats.ast_be_missed++; DPRINTF(sc, ATH_DEBUG_BEACON, "%s: missed %u consecutive beacons\n", __func__, sc->sc_bmisscount); if (sc->sc_bmisscount >= ath_bstuck_threshold) taskqueue_enqueue(sc->sc_tq, &sc->sc_bstucktask); return; } if (sc->sc_bmisscount != 0) { DPRINTF(sc, ATH_DEBUG_BEACON, "%s: resume beacon xmit after %u misses\n", __func__, sc->sc_bmisscount); sc->sc_bmisscount = 0; } if (sc->sc_stagbeacons) { /* staggered beacons */ struct ieee80211com *ic = sc->sc_ifp->if_l2com; uint32_t tsftu; tsftu = ath_hal_gettsf32(ah) >> 10; /* XXX lintval */ slot = ((tsftu % ic->ic_lintval) * ATH_BCBUF) / ic->ic_lintval; vap = sc->sc_bslot[(slot+1) % ATH_BCBUF]; bfaddr = 0; if (vap != NULL && vap->iv_state >= IEEE80211_S_RUN) { bf = ath_beacon_generate(sc, vap); if (bf != NULL) bfaddr = bf->bf_daddr; } } else { /* burst'd beacons */ uint32_t *bflink = &bfaddr; for (slot = 0; slot < ATH_BCBUF; slot++) { vap = sc->sc_bslot[slot]; if (vap != NULL && vap->iv_state >= IEEE80211_S_RUN) { bf = ath_beacon_generate(sc, vap); if (bf != NULL) { *bflink = bf->bf_daddr; bflink = &bf->bf_desc->ds_link; } } } *bflink = 0; /* terminate list */ } /* * Handle slot time change when a non-ERP station joins/leaves * an 11g network. The 802.11 layer notifies us via callback, * we mark updateslot, then wait one beacon before effecting * the change. This gives associated stations at least one * beacon interval to note the state change. */ /* XXX locking */ if (sc->sc_updateslot == UPDATE) { sc->sc_updateslot = COMMIT; /* commit next beacon */ sc->sc_slotupdate = slot; } else if (sc->sc_updateslot == COMMIT && sc->sc_slotupdate == slot) ath_setslottime(sc); /* commit change to h/w */ /* * Check recent per-antenna transmit statistics and flip * the default antenna if noticeably more frames went out * on the non-default antenna. * XXX assumes 2 anntenae */ if (!sc->sc_diversity && (!sc->sc_stagbeacons || slot == 0)) { otherant = sc->sc_defant & 1 ? 2 : 1; if (sc->sc_ant_tx[otherant] > sc->sc_ant_tx[sc->sc_defant] + 2) ath_setdefantenna(sc, otherant); sc->sc_ant_tx[1] = sc->sc_ant_tx[2] = 0; } if (bfaddr != 0) { /* * Stop any current dma and put the new frame on the queue. * This should never fail since we check above that no frames * are still pending on the queue. */ if (!ath_hal_stoptxdma(ah, sc->sc_bhalq)) { DPRINTF(sc, ATH_DEBUG_ANY, "%s: beacon queue %u did not stop?\n", __func__, sc->sc_bhalq); } /* NB: cabq traffic should already be queued and primed */ ath_hal_puttxbuf(ah, sc->sc_bhalq, bfaddr); ath_hal_txstart(ah, sc->sc_bhalq); sc->sc_stats.ast_be_xmit++; } } static struct ath_buf * ath_beacon_generate(struct ath_softc *sc, struct ieee80211vap *vap) { struct ath_vap *avp = ATH_VAP(vap); struct ath_txq *cabq = sc->sc_cabq; struct ath_buf *bf; struct mbuf *m; int nmcastq, error; KASSERT(vap->iv_state >= IEEE80211_S_RUN, ("not running, state %d", vap->iv_state)); KASSERT(avp->av_bcbuf != NULL, ("no beacon buffer")); /* * Update dynamic beacon contents. If this returns * non-zero then we need to remap the memory because * the beacon frame changed size (probably because * of the TIM bitmap). */ bf = avp->av_bcbuf; m = bf->bf_m; /* XXX lock mcastq? */ nmcastq = avp->av_mcastq.axq_depth; if (ieee80211_beacon_update(bf->bf_node, &avp->av_boff, m, nmcastq)) { /* XXX too conservative? */ bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, bf->bf_segs, &bf->bf_nseg, BUS_DMA_NOWAIT); if (error != 0) { if_printf(vap->iv_ifp, "%s: bus_dmamap_load_mbuf_sg failed, error %u\n", __func__, error); return NULL; } } if ((avp->av_boff.bo_tim[4] & 1) && cabq->axq_depth) { DPRINTF(sc, ATH_DEBUG_BEACON, "%s: cabq did not drain, mcastq %u cabq %u\n", __func__, nmcastq, cabq->axq_depth); sc->sc_stats.ast_cabq_busy++; if (sc->sc_nvaps > 1 && sc->sc_stagbeacons) { /* * CABQ traffic from a previous vap is still pending. * We must drain the q before this beacon frame goes * out as otherwise this vap's stations will get cab * frames from a different vap. * XXX could be slow causing us to miss DBA */ ath_tx_draintxq(sc, cabq); } } ath_beacon_setup(sc, bf); bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); /* * Enable the CAB queue before the beacon queue to * insure cab frames are triggered by this beacon. */ if (avp->av_boff.bo_tim[4] & 1) { struct ath_hal *ah = sc->sc_ah; /* NB: only at DTIM */ ATH_TXQ_LOCK(cabq); ATH_TXQ_LOCK(&avp->av_mcastq); if (nmcastq) { struct ath_buf *bfm; /* * Move frames from the s/w mcast q to the h/w cab q. * XXX MORE_DATA bit */ bfm = TAILQ_FIRST(&avp->av_mcastq.axq_q); if (cabq->axq_link != NULL) { *cabq->axq_link = bfm->bf_daddr; } else ath_hal_puttxbuf(ah, cabq->axq_qnum, bfm->bf_daddr); ath_txqmove(cabq, &avp->av_mcastq); sc->sc_stats.ast_cabq_xmit += nmcastq; } /* NB: gated by beacon so safe to start here */ if (! TAILQ_EMPTY(&(cabq->axq_q))) ath_hal_txstart(ah, cabq->axq_qnum); ATH_TXQ_UNLOCK(&avp->av_mcastq); ATH_TXQ_UNLOCK(cabq); } return bf; } static void ath_beacon_start_adhoc(struct ath_softc *sc, struct ieee80211vap *vap) { struct ath_vap *avp = ATH_VAP(vap); struct ath_hal *ah = sc->sc_ah; struct ath_buf *bf; struct mbuf *m; int error; KASSERT(avp->av_bcbuf != NULL, ("no beacon buffer")); /* * Update dynamic beacon contents. If this returns * non-zero then we need to remap the memory because * the beacon frame changed size (probably because * of the TIM bitmap). */ bf = avp->av_bcbuf; m = bf->bf_m; if (ieee80211_beacon_update(bf->bf_node, &avp->av_boff, m, 0)) { /* XXX too conservative? */ bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, bf->bf_segs, &bf->bf_nseg, BUS_DMA_NOWAIT); if (error != 0) { if_printf(vap->iv_ifp, "%s: bus_dmamap_load_mbuf_sg failed, error %u\n", __func__, error); return; } } ath_beacon_setup(sc, bf); bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); /* NB: caller is known to have already stopped tx dma */ ath_hal_puttxbuf(ah, sc->sc_bhalq, bf->bf_daddr); ath_hal_txstart(ah, sc->sc_bhalq); } /* * Reset the hardware, with no loss. * * This can't be used for a general case reset. */ static void ath_reset_proc(void *arg, int pending) { struct ath_softc *sc = arg; struct ifnet *ifp = sc->sc_ifp; #if 0 if_printf(ifp, "%s: resetting\n", __func__); #endif ath_reset(ifp, ATH_RESET_NOLOSS); } /* * Reset the hardware after detecting beacons have stopped. */ static void ath_bstuck_proc(void *arg, int pending) { struct ath_softc *sc = arg; struct ifnet *ifp = sc->sc_ifp; uint32_t hangs = 0; if (ath_hal_gethangstate(sc->sc_ah, 0xff, &hangs) && hangs != 0) if_printf(ifp, "bb hang detected (0x%x)\n", hangs); if_printf(ifp, "stuck beacon; resetting (bmiss count %u)\n", sc->sc_bmisscount); sc->sc_stats.ast_bstuck++; /* * This assumes that there's no simultaneous channel mode change * occuring. */ ath_reset(ifp, ATH_RESET_NOLOSS); } /* * Reclaim beacon resources and return buffer to the pool. */ static void ath_beacon_return(struct ath_softc *sc, struct ath_buf *bf) { DPRINTF(sc, ATH_DEBUG_NODE, "%s: free bf=%p, bf_m=%p, bf_node=%p\n", __func__, bf, bf->bf_m, bf->bf_node); if (bf->bf_m != NULL) { bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); m_freem(bf->bf_m); bf->bf_m = NULL; } if (bf->bf_node != NULL) { ieee80211_free_node(bf->bf_node); bf->bf_node = NULL; } TAILQ_INSERT_TAIL(&sc->sc_bbuf, bf, bf_list); } /* * Reclaim beacon resources. */ static void ath_beacon_free(struct ath_softc *sc) { struct ath_buf *bf; TAILQ_FOREACH(bf, &sc->sc_bbuf, bf_list) { DPRINTF(sc, ATH_DEBUG_NODE, "%s: free bf=%p, bf_m=%p, bf_node=%p\n", __func__, bf, bf->bf_m, bf->bf_node); if (bf->bf_m != NULL) { bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); m_freem(bf->bf_m); bf->bf_m = NULL; } if (bf->bf_node != NULL) { ieee80211_free_node(bf->bf_node); bf->bf_node = NULL; } } } /* * Configure the beacon and sleep timers. * * When operating as an AP this resets the TSF and sets * up the hardware to notify us when we need to issue beacons. * * When operating in station mode this sets up the beacon * timers according to the timestamp of the last received * beacon and the current TSF, configures PCF and DTIM * handling, programs the sleep registers so the hardware * will wakeup in time to receive beacons, and configures * the beacon miss handling so we'll receive a BMISS * interrupt when we stop seeing beacons from the AP * we've associated with. */ static void ath_beacon_config(struct ath_softc *sc, struct ieee80211vap *vap) { #define TSF_TO_TU(_h,_l) \ ((((u_int32_t)(_h)) << 22) | (((u_int32_t)(_l)) >> 10)) #define FUDGE 2 struct ath_hal *ah = sc->sc_ah; struct ieee80211com *ic = sc->sc_ifp->if_l2com; struct ieee80211_node *ni; u_int32_t nexttbtt, intval, tsftu; u_int64_t tsf; if (vap == NULL) vap = TAILQ_FIRST(&ic->ic_vaps); /* XXX */ ni = ieee80211_ref_node(vap->iv_bss); /* extract tstamp from last beacon and convert to TU */ nexttbtt = TSF_TO_TU(LE_READ_4(ni->ni_tstamp.data + 4), LE_READ_4(ni->ni_tstamp.data)); if (ic->ic_opmode == IEEE80211_M_HOSTAP || ic->ic_opmode == IEEE80211_M_MBSS) { /* * For multi-bss ap/mesh support beacons are either staggered * evenly over N slots or burst together. For the former * arrange for the SWBA to be delivered for each slot. * Slots that are not occupied will generate nothing. */ /* NB: the beacon interval is kept internally in TU's */ intval = ni->ni_intval & HAL_BEACON_PERIOD; if (sc->sc_stagbeacons) intval /= ATH_BCBUF; } else { /* NB: the beacon interval is kept internally in TU's */ intval = ni->ni_intval & HAL_BEACON_PERIOD; } if (nexttbtt == 0) /* e.g. for ap mode */ nexttbtt = intval; else if (intval) /* NB: can be 0 for monitor mode */ nexttbtt = roundup(nexttbtt, intval); DPRINTF(sc, ATH_DEBUG_BEACON, "%s: nexttbtt %u intval %u (%u)\n", __func__, nexttbtt, intval, ni->ni_intval); if (ic->ic_opmode == IEEE80211_M_STA && !sc->sc_swbmiss) { HAL_BEACON_STATE bs; int dtimperiod, dtimcount; int cfpperiod, cfpcount; /* * Setup dtim and cfp parameters according to * last beacon we received (which may be none). */ dtimperiod = ni->ni_dtim_period; if (dtimperiod <= 0) /* NB: 0 if not known */ dtimperiod = 1; dtimcount = ni->ni_dtim_count; if (dtimcount >= dtimperiod) /* NB: sanity check */ dtimcount = 0; /* XXX? */ cfpperiod = 1; /* NB: no PCF support yet */ cfpcount = 0; /* * Pull nexttbtt forward to reflect the current * TSF and calculate dtim+cfp state for the result. */ tsf = ath_hal_gettsf64(ah); tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE; do { nexttbtt += intval; if (--dtimcount < 0) { dtimcount = dtimperiod - 1; if (--cfpcount < 0) cfpcount = cfpperiod - 1; } } while (nexttbtt < tsftu); memset(&bs, 0, sizeof(bs)); bs.bs_intval = intval; bs.bs_nexttbtt = nexttbtt; bs.bs_dtimperiod = dtimperiod*intval; bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval; bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod; bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod; bs.bs_cfpmaxduration = 0; #if 0 /* * The 802.11 layer records the offset to the DTIM * bitmap while receiving beacons; use it here to * enable h/w detection of our AID being marked in * the bitmap vector (to indicate frames for us are * pending at the AP). * XXX do DTIM handling in s/w to WAR old h/w bugs * XXX enable based on h/w rev for newer chips */ bs.bs_timoffset = ni->ni_timoff; #endif /* * Calculate the number of consecutive beacons to miss * before taking a BMISS interrupt. * Note that we clamp the result to at most 10 beacons. */ bs.bs_bmissthreshold = vap->iv_bmissthreshold; if (bs.bs_bmissthreshold > 10) bs.bs_bmissthreshold = 10; else if (bs.bs_bmissthreshold <= 0) bs.bs_bmissthreshold = 1; /* * Calculate sleep duration. The configuration is * given in ms. We insure a multiple of the beacon * period is used. Also, if the sleep duration is * greater than the DTIM period then it makes senses * to make it a multiple of that. * * XXX fixed at 100ms */ bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), bs.bs_intval); if (bs.bs_sleepduration > bs.bs_dtimperiod) bs.bs_sleepduration = roundup(bs.bs_sleepduration, bs.bs_dtimperiod); DPRINTF(sc, ATH_DEBUG_BEACON, "%s: tsf %ju tsf:tu %u intval %u nexttbtt %u dtim %u nextdtim %u bmiss %u sleep %u cfp:period %u maxdur %u next %u timoffset %u\n" , __func__ , tsf, tsftu , bs.bs_intval , bs.bs_nexttbtt , bs.bs_dtimperiod , bs.bs_nextdtim , bs.bs_bmissthreshold , bs.bs_sleepduration , bs.bs_cfpperiod , bs.bs_cfpmaxduration , bs.bs_cfpnext , bs.bs_timoffset ); ath_hal_intrset(ah, 0); ath_hal_beacontimers(ah, &bs); sc->sc_imask |= HAL_INT_BMISS; ath_hal_intrset(ah, sc->sc_imask); } else { ath_hal_intrset(ah, 0); if (nexttbtt == intval) intval |= HAL_BEACON_RESET_TSF; if (ic->ic_opmode == IEEE80211_M_IBSS) { /* * In IBSS mode enable the beacon timers but only * enable SWBA interrupts if we need to manually * prepare beacon frames. Otherwise we use a * self-linked tx descriptor and let the hardware * deal with things. */ intval |= HAL_BEACON_ENA; if (!sc->sc_hasveol) sc->sc_imask |= HAL_INT_SWBA; if ((intval & HAL_BEACON_RESET_TSF) == 0) { /* * Pull nexttbtt forward to reflect * the current TSF. */ tsf = ath_hal_gettsf64(ah); tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE; do { nexttbtt += intval; } while (nexttbtt < tsftu); } ath_beaconq_config(sc); } else if (ic->ic_opmode == IEEE80211_M_HOSTAP || ic->ic_opmode == IEEE80211_M_MBSS) { /* * In AP/mesh mode we enable the beacon timers * and SWBA interrupts to prepare beacon frames. */ intval |= HAL_BEACON_ENA; sc->sc_imask |= HAL_INT_SWBA; /* beacon prepare */ ath_beaconq_config(sc); } ath_hal_beaconinit(ah, nexttbtt, intval); sc->sc_bmisscount = 0; ath_hal_intrset(ah, sc->sc_imask); /* * When using a self-linked beacon descriptor in * ibss mode load it once here. */ if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) ath_beacon_start_adhoc(sc, vap); } sc->sc_syncbeacon = 0; ieee80211_free_node(ni); #undef FUDGE #undef TSF_TO_TU } static void ath_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error) { bus_addr_t *paddr = (bus_addr_t*) arg; KASSERT(error == 0, ("error %u on bus_dma callback", error)); *paddr = segs->ds_addr; } static int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd, ath_bufhead *head, const char *name, int nbuf, int ndesc) { #define DS2PHYS(_dd, _ds) \ ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc)) #define ATH_DESC_4KB_BOUND_CHECK(_daddr, _len) \ ((((u_int32_t)(_daddr) & 0xFFF) > (0x1000 - (_len))) ? 1 : 0) struct ifnet *ifp = sc->sc_ifp; uint8_t *ds; struct ath_buf *bf; int i, bsize, error; int desc_len; desc_len = sizeof(struct ath_desc); DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA: %u buffers %u desc/buf\n", __func__, name, nbuf, ndesc); dd->dd_name = name; dd->dd_desc_len = desc_len * nbuf * ndesc; /* * Merlin work-around: * Descriptors that cross the 4KB boundary can't be used. * Assume one skipped descriptor per 4KB page. */ if (! ath_hal_split4ktrans(sc->sc_ah)) { int numdescpage = 4096 / (desc_len * ndesc); dd->dd_desc_len = (nbuf / numdescpage + 1) * 4096; } /* * Setup DMA descriptor area. */ error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), /* parent */ PAGE_SIZE, 0, /* alignment, bounds */ BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ BUS_SPACE_MAXADDR, /* highaddr */ NULL, NULL, /* filter, filterarg */ dd->dd_desc_len, /* maxsize */ 1, /* nsegments */ dd->dd_desc_len, /* maxsegsize */ BUS_DMA_ALLOCNOW, /* flags */ NULL, /* lockfunc */ NULL, /* lockarg */ &dd->dd_dmat); if (error != 0) { if_printf(ifp, "cannot allocate %s DMA tag\n", dd->dd_name); return error; } /* allocate descriptors */ error = bus_dmamap_create(dd->dd_dmat, BUS_DMA_NOWAIT, &dd->dd_dmamap); if (error != 0) { if_printf(ifp, "unable to create dmamap for %s descriptors, " "error %u\n", dd->dd_name, error); goto fail0; } error = bus_dmamem_alloc(dd->dd_dmat, (void**) &dd->dd_desc, BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &dd->dd_dmamap); if (error != 0) { if_printf(ifp, "unable to alloc memory for %u %s descriptors, " "error %u\n", nbuf * ndesc, dd->dd_name, error); goto fail1; } error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap, dd->dd_desc, dd->dd_desc_len, ath_load_cb, &dd->dd_desc_paddr, BUS_DMA_NOWAIT); if (error != 0) { if_printf(ifp, "unable to map %s descriptors, error %u\n", dd->dd_name, error); goto fail2; } ds = (uint8_t *) dd->dd_desc; DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA map: %p (%lu) -> %p (%lu)\n", __func__, dd->dd_name, ds, (u_long) dd->dd_desc_len, (caddr_t) dd->dd_desc_paddr, /*XXX*/ (u_long) dd->dd_desc_len); /* allocate rx buffers */ bsize = sizeof(struct ath_buf) * nbuf; bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO); if (bf == NULL) { if_printf(ifp, "malloc of %s buffers failed, size %u\n", dd->dd_name, bsize); goto fail3; } dd->dd_bufptr = bf; TAILQ_INIT(head); for (i = 0; i < nbuf; i++, bf++, ds += (ndesc * desc_len)) { bf->bf_desc = (struct ath_desc *) ds; bf->bf_daddr = DS2PHYS(dd, ds); if (! ath_hal_split4ktrans(sc->sc_ah)) { /* * Merlin WAR: Skip descriptor addresses which * cause 4KB boundary crossing along any point * in the descriptor. */ if (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr, desc_len * ndesc)) { /* Start at the next page */ ds += 0x1000 - (bf->bf_daddr & 0xFFF); bf->bf_desc = (struct ath_desc *) ds; bf->bf_daddr = DS2PHYS(dd, ds); } } error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT, &bf->bf_dmamap); if (error != 0) { if_printf(ifp, "unable to create dmamap for %s " "buffer %u, error %u\n", dd->dd_name, i, error); ath_descdma_cleanup(sc, dd, head); return error; } bf->bf_lastds = bf->bf_desc; /* Just an initial value */ TAILQ_INSERT_TAIL(head, bf, bf_list); } return 0; fail3: bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); fail2: bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); fail1: bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap); fail0: bus_dma_tag_destroy(dd->dd_dmat); memset(dd, 0, sizeof(*dd)); return error; #undef DS2PHYS #undef ATH_DESC_4KB_BOUND_CHECK } static void ath_descdma_cleanup(struct ath_softc *sc, struct ath_descdma *dd, ath_bufhead *head) { struct ath_buf *bf; struct ieee80211_node *ni; bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap); bus_dma_tag_destroy(dd->dd_dmat); TAILQ_FOREACH(bf, head, bf_list) { if (bf->bf_m) { m_freem(bf->bf_m); bf->bf_m = NULL; } if (bf->bf_dmamap != NULL) { bus_dmamap_destroy(sc->sc_dmat, bf->bf_dmamap); bf->bf_dmamap = NULL; } ni = bf->bf_node; bf->bf_node = NULL; if (ni != NULL) { /* * Reclaim node reference. */ ieee80211_free_node(ni); } } TAILQ_INIT(head); free(dd->dd_bufptr, M_ATHDEV); memset(dd, 0, sizeof(*dd)); } static int ath_desc_alloc(struct ath_softc *sc) { int error; error = ath_descdma_setup(sc, &sc->sc_rxdma, &sc->sc_rxbuf, "rx", ath_rxbuf, 1); if (error != 0) return error; error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf, "tx", ath_txbuf, ATH_TXDESC); if (error != 0) { ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); return error; } error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf, "beacon", ATH_BCBUF, 1); if (error != 0) { ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); return error; } return 0; } static void ath_desc_free(struct ath_softc *sc) { if (sc->sc_bdma.dd_desc_len != 0) ath_descdma_cleanup(sc, &sc->sc_bdma, &sc->sc_bbuf); if (sc->sc_txdma.dd_desc_len != 0) ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); if (sc->sc_rxdma.dd_desc_len != 0) ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); } static struct ieee80211_node * ath_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN]) { struct ieee80211com *ic = vap->iv_ic; struct ath_softc *sc = ic->ic_ifp->if_softc; const size_t space = sizeof(struct ath_node) + sc->sc_rc->arc_space; struct ath_node *an; an = malloc(space, M_80211_NODE, M_NOWAIT|M_ZERO); if (an == NULL) { /* XXX stat+msg */ return NULL; } ath_rate_node_init(sc, an); /* Setup the mutex - there's no associd yet so set the name to NULL */ snprintf(an->an_name, sizeof(an->an_name), "%s: node %p", device_get_nameunit(sc->sc_dev), an); mtx_init(&an->an_mtx, an->an_name, NULL, MTX_DEF); /* XXX setup ath_tid */ ath_tx_tid_init(sc, an); DPRINTF(sc, ATH_DEBUG_NODE, "%s: an %p\n", __func__, an); return &an->an_node; } static void ath_node_cleanup(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; struct ath_softc *sc = ic->ic_ifp->if_softc; /* Cleanup ath_tid, free unused bufs, unlink bufs in TXQ */ ath_tx_node_flush(sc, ATH_NODE(ni)); ath_rate_node_cleanup(sc, ATH_NODE(ni)); sc->sc_node_cleanup(ni); } static void ath_node_free(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; struct ath_softc *sc = ic->ic_ifp->if_softc; DPRINTF(sc, ATH_DEBUG_NODE, "%s: ni %p\n", __func__, ni); mtx_destroy(&ATH_NODE(ni)->an_mtx); sc->sc_node_free(ni); } static void ath_node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) { struct ieee80211com *ic = ni->ni_ic; struct ath_softc *sc = ic->ic_ifp->if_softc; struct ath_hal *ah = sc->sc_ah; *rssi = ic->ic_node_getrssi(ni); if (ni->ni_chan != IEEE80211_CHAN_ANYC) *noise = ath_hal_getchannoise(ah, ni->ni_chan); else *noise = -95; /* nominally correct */ } static int ath_rxbuf_init(struct ath_softc *sc, struct ath_buf *bf) { struct ath_hal *ah = sc->sc_ah; int error; struct mbuf *m; struct ath_desc *ds; m = bf->bf_m; if (m == NULL) { /* * NB: by assigning a page to the rx dma buffer we * implicitly satisfy the Atheros requirement that * this buffer be cache-line-aligned and sized to be * multiple of the cache line size. Not doing this * causes weird stuff to happen (for the 5210 at least). */ m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); if (m == NULL) { DPRINTF(sc, ATH_DEBUG_ANY, "%s: no mbuf/cluster\n", __func__); sc->sc_stats.ast_rx_nombuf++; return ENOMEM; } m->m_pkthdr.len = m->m_len = m->m_ext.ext_size; error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, bf->bf_segs, &bf->bf_nseg, BUS_DMA_NOWAIT); if (error != 0) { DPRINTF(sc, ATH_DEBUG_ANY, "%s: bus_dmamap_load_mbuf_sg failed; error %d\n", __func__, error); sc->sc_stats.ast_rx_busdma++; m_freem(m); return error; } KASSERT(bf->bf_nseg == 1, ("multi-segment packet; nseg %u", bf->bf_nseg)); bf->bf_m = m; } bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREREAD); /* * Setup descriptors. For receive we always terminate * the descriptor list with a self-linked entry so we'll * not get overrun under high load (as can happen with a * 5212 when ANI processing enables PHY error frames). * * To insure the last descriptor is self-linked we create * each descriptor as self-linked and add it to the end. As * each additional descriptor is added the previous self-linked * entry is ``fixed'' naturally. This should be safe even * if DMA is happening. When processing RX interrupts we * never remove/process the last, self-linked, entry on the * descriptor list. This insures the hardware always has * someplace to write a new frame. */ /* * 11N: we can no longer afford to self link the last descriptor. * MAC acknowledges BA status as long as it copies frames to host * buffer (or rx fifo). This can incorrectly acknowledge packets * to a sender if last desc is self-linked. */ ds = bf->bf_desc; if (sc->sc_rxslink) ds->ds_link = bf->bf_daddr; /* link to self */ else ds->ds_link = 0; /* terminate the list */ ds->ds_data = bf->bf_segs[0].ds_addr; ath_hal_setuprxdesc(ah, ds , m->m_len /* buffer size */ , 0 ); if (sc->sc_rxlink != NULL) *sc->sc_rxlink = bf->bf_daddr; sc->sc_rxlink = &ds->ds_link; return 0; } /* * Extend 15-bit time stamp from rx descriptor to * a full 64-bit TSF using the specified TSF. */ static __inline u_int64_t ath_extend_tsf15(u_int32_t rstamp, u_int64_t tsf) { if ((tsf & 0x7fff) < rstamp) tsf -= 0x8000; return ((tsf &~ 0x7fff) | rstamp); } /* * Extend 32-bit time stamp from rx descriptor to * a full 64-bit TSF using the specified TSF. */ static __inline u_int64_t ath_extend_tsf32(u_int32_t rstamp, u_int64_t tsf) { u_int32_t tsf_low = tsf & 0xffffffff; u_int64_t tsf64 = (tsf & ~0xffffffffULL) | rstamp; if (rstamp > tsf_low && (rstamp - tsf_low > 0x10000000)) tsf64 -= 0x100000000ULL; if (rstamp < tsf_low && (tsf_low - rstamp > 0x10000000)) tsf64 += 0x100000000ULL; return tsf64; } /* * Extend the TSF from the RX descriptor to a full 64 bit TSF. * Earlier hardware versions only wrote the low 15 bits of the * TSF into the RX descriptor; later versions (AR5416 and up) * include the 32 bit TSF value. */ static __inline u_int64_t ath_extend_tsf(struct ath_softc *sc, u_int32_t rstamp, u_int64_t tsf) { if (sc->sc_rxtsf32) return ath_extend_tsf32(rstamp, tsf); else return ath_extend_tsf15(rstamp, tsf); } /* * Intercept management frames to collect beacon rssi data * and to do ibss merges. */ static void ath_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m, int subtype, int rssi, int nf) { struct ieee80211vap *vap = ni->ni_vap; struct ath_softc *sc = vap->iv_ic->ic_ifp->if_softc; /* * Call up first so subsequent work can use information * potentially stored in the node (e.g. for ibss merge). */ ATH_VAP(vap)->av_recv_mgmt(ni, m, subtype, rssi, nf); switch (subtype) { case IEEE80211_FC0_SUBTYPE_BEACON: /* update rssi statistics for use by the hal */ /* XXX unlocked check against vap->iv_bss? */ ATH_RSSI_LPF(sc->sc_halstats.ns_avgbrssi, rssi); if (sc->sc_syncbeacon && ni == vap->iv_bss && vap->iv_state == IEEE80211_S_RUN) { /* * Resync beacon timers using the tsf of the beacon * frame we just received. */ ath_beacon_config(sc, vap); } /* fall thru... */ case IEEE80211_FC0_SUBTYPE_PROBE_RESP: if (vap->iv_opmode == IEEE80211_M_IBSS && vap->iv_state == IEEE80211_S_RUN) { uint32_t rstamp = sc->sc_lastrs->rs_tstamp; uint64_t tsf = ath_extend_tsf(sc, rstamp, ath_hal_gettsf64(sc->sc_ah)); /* * Handle ibss merge as needed; check the tsf on the * frame before attempting the merge. The 802.11 spec * says the station should change it's bssid to match * the oldest station with the same ssid, where oldest * is determined by the tsf. Note that hardware * reconfiguration happens through callback to * ath_newstate as the state machine will go from * RUN -> RUN when this happens. */ if (le64toh(ni->ni_tstamp.tsf) >= tsf) { DPRINTF(sc, ATH_DEBUG_STATE, "ibss merge, rstamp %u tsf %ju " "tstamp %ju\n", rstamp, (uintmax_t)tsf, (uintmax_t)ni->ni_tstamp.tsf); (void) ieee80211_ibss_merge(ni); } } break; } } /* * Set the default antenna. */ static void ath_setdefantenna(struct ath_softc *sc, u_int antenna) { struct ath_hal *ah = sc->sc_ah; /* XXX block beacon interrupts */ ath_hal_setdefantenna(ah, antenna); if (sc->sc_defant != antenna) sc->sc_stats.ast_ant_defswitch++; sc->sc_defant = antenna; sc->sc_rxotherant = 0; } static void ath_rx_tap(struct ifnet *ifp, struct mbuf *m, const struct ath_rx_status *rs, u_int64_t tsf, int16_t nf) { #define CHAN_HT20 htole32(IEEE80211_CHAN_HT20) #define CHAN_HT40U htole32(IEEE80211_CHAN_HT40U) #define CHAN_HT40D htole32(IEEE80211_CHAN_HT40D) #define CHAN_HT (CHAN_HT20|CHAN_HT40U|CHAN_HT40D) struct ath_softc *sc = ifp->if_softc; const HAL_RATE_TABLE *rt; uint8_t rix; rt = sc->sc_currates; KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); rix = rt->rateCodeToIndex[rs->rs_rate]; sc->sc_rx_th.wr_rate = sc->sc_hwmap[rix].ieeerate; sc->sc_rx_th.wr_flags = sc->sc_hwmap[rix].rxflags; #ifdef AH_SUPPORT_AR5416 sc->sc_rx_th.wr_chan_flags &= ~CHAN_HT; if (sc->sc_rx_th.wr_rate & IEEE80211_RATE_MCS) { /* HT rate */ struct ieee80211com *ic = ifp->if_l2com; if ((rs->rs_flags & HAL_RX_2040) == 0) sc->sc_rx_th.wr_chan_flags |= CHAN_HT20; else if (IEEE80211_IS_CHAN_HT40U(ic->ic_curchan)) sc->sc_rx_th.wr_chan_flags |= CHAN_HT40U; else sc->sc_rx_th.wr_chan_flags |= CHAN_HT40D; if ((rs->rs_flags & HAL_RX_GI) == 0) sc->sc_rx_th.wr_flags |= IEEE80211_RADIOTAP_F_SHORTGI; } #endif sc->sc_rx_th.wr_tsf = htole64(ath_extend_tsf(sc, rs->rs_tstamp, tsf)); if (rs->rs_status & HAL_RXERR_CRC) sc->sc_rx_th.wr_flags |= IEEE80211_RADIOTAP_F_BADFCS; /* XXX propagate other error flags from descriptor */ sc->sc_rx_th.wr_antnoise = nf; sc->sc_rx_th.wr_antsignal = nf + rs->rs_rssi; sc->sc_rx_th.wr_antenna = rs->rs_antenna; #undef CHAN_HT #undef CHAN_HT20 #undef CHAN_HT40U #undef CHAN_HT40D } static void ath_handle_micerror(struct ieee80211com *ic, struct ieee80211_frame *wh, int keyix) { struct ieee80211_node *ni; /* XXX recheck MIC to deal w/ chips that lie */ /* XXX discard MIC errors on !data frames */ ni = ieee80211_find_rxnode(ic, (const struct ieee80211_frame_min *) wh); if (ni != NULL) { ieee80211_notify_michael_failure(ni->ni_vap, wh, keyix); ieee80211_free_node(ni); } } /* * Only run the RX proc if it's not already running. * Since this may get run as part of the reset/flush path, * the task can't clash with an existing, running tasklet. */ static void ath_rx_tasklet(void *arg, int npending) { struct ath_softc *sc = arg; CTR1(ATH_KTR_INTR, "ath_rx_proc: pending=%d", npending); DPRINTF(sc, ATH_DEBUG_RX_PROC, "%s: pending %u\n", __func__, npending); ATH_PCU_LOCK(sc); if (sc->sc_inreset_cnt > 0) { device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; skipping\n", __func__); ATH_PCU_UNLOCK(sc); return; } ATH_PCU_UNLOCK(sc); ath_rx_proc(sc, 1); } static void ath_rx_proc(struct ath_softc *sc, int resched) { #define PA2DESC(_sc, _pa) \ ((struct ath_desc *)((caddr_t)(_sc)->sc_rxdma.dd_desc + \ ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr))) struct ath_buf *bf; struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; struct ath_hal *ah = sc->sc_ah; struct ath_desc *ds; struct ath_rx_status *rs; struct mbuf *m; struct ieee80211_node *ni; int len, type, ngood; HAL_STATUS status; int16_t nf; u_int64_t tsf, rstamp; int npkts = 0; /* XXX we must not hold the ATH_LOCK here */ ATH_UNLOCK_ASSERT(sc); ATH_PCU_UNLOCK_ASSERT(sc); ATH_PCU_LOCK(sc); sc->sc_rxproc_cnt++; ATH_PCU_UNLOCK(sc); DPRINTF(sc, ATH_DEBUG_RX_PROC, "%s: called\n", __func__); ngood = 0; nf = ath_hal_getchannoise(ah, sc->sc_curchan); sc->sc_stats.ast_rx_noise = nf; tsf = ath_hal_gettsf64(ah); do { bf = TAILQ_FIRST(&sc->sc_rxbuf); if (sc->sc_rxslink && bf == NULL) { /* NB: shouldn't happen */ if_printf(ifp, "%s: no buffer!\n", __func__); break; } else if (bf == NULL) { /* * End of List: * this can happen for non-self-linked RX chains */ sc->sc_stats.ast_rx_hitqueueend++; break; } m = bf->bf_m; if (m == NULL) { /* NB: shouldn't happen */ /* * If mbuf allocation failed previously there * will be no mbuf; try again to re-populate it. */ /* XXX make debug msg */ if_printf(ifp, "%s: no mbuf!\n", __func__); TAILQ_REMOVE(&sc->sc_rxbuf, bf, bf_list); goto rx_next; } ds = bf->bf_desc; if (ds->ds_link == bf->bf_daddr) { /* NB: never process the self-linked entry at the end */ sc->sc_stats.ast_rx_hitqueueend++; break; } /* XXX sync descriptor memory */ /* * Must provide the virtual address of the current * descriptor, the physical address, and the virtual * address of the next descriptor in the h/w chain. * This allows the HAL to look ahead to see if the * hardware is done with a descriptor by checking the * done bit in the following descriptor and the address * of the current descriptor the DMA engine is working * on. All this is necessary because of our use of * a self-linked list to avoid rx overruns. */ rs = &bf->bf_status.ds_rxstat; status = ath_hal_rxprocdesc(ah, ds, bf->bf_daddr, PA2DESC(sc, ds->ds_link), rs); #ifdef ATH_DEBUG if (sc->sc_debug & ATH_DEBUG_RECV_DESC) ath_printrxbuf(sc, bf, 0, status == HAL_OK); #endif if (status == HAL_EINPROGRESS) break; TAILQ_REMOVE(&sc->sc_rxbuf, bf, bf_list); npkts++; /* * Calculate the correct 64 bit TSF given * the TSF64 register value and rs_tstamp. */ rstamp = ath_extend_tsf(sc, rs->rs_tstamp, tsf); /* These aren't specifically errors */ #ifdef AH_SUPPORT_AR5416 if (rs->rs_flags & HAL_RX_GI) sc->sc_stats.ast_rx_halfgi++; if (rs->rs_flags & HAL_RX_2040) sc->sc_stats.ast_rx_2040++; if (rs->rs_flags & HAL_RX_DELIM_CRC_PRE) sc->sc_stats.ast_rx_pre_crc_err++; if (rs->rs_flags & HAL_RX_DELIM_CRC_POST) sc->sc_stats.ast_rx_post_crc_err++; if (rs->rs_flags & HAL_RX_DECRYPT_BUSY) sc->sc_stats.ast_rx_decrypt_busy_err++; if (rs->rs_flags & HAL_RX_HI_RX_CHAIN) sc->sc_stats.ast_rx_hi_rx_chain++; #endif /* AH_SUPPORT_AR5416 */ if (rs->rs_status != 0) { if (rs->rs_status & HAL_RXERR_CRC) sc->sc_stats.ast_rx_crcerr++; if (rs->rs_status & HAL_RXERR_FIFO) sc->sc_stats.ast_rx_fifoerr++; if (rs->rs_status & HAL_RXERR_PHY) { sc->sc_stats.ast_rx_phyerr++; /* Process DFS radar events */ if ((rs->rs_phyerr == HAL_PHYERR_RADAR) || (rs->rs_phyerr == HAL_PHYERR_FALSE_RADAR_EXT)) { /* Since we're touching the frame data, sync it */ bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_POSTREAD); /* Now pass it to the radar processing code */ ath_dfs_process_phy_err(sc, mtod(m, char *), rstamp, rs); } /* Be suitably paranoid about receiving phy errors out of the stats array bounds */ if (rs->rs_phyerr < 64) sc->sc_stats.ast_rx_phy[rs->rs_phyerr]++; goto rx_error; /* NB: don't count in ierrors */ } if (rs->rs_status & HAL_RXERR_DECRYPT) { /* * Decrypt error. If the error occurred * because there was no hardware key, then * let the frame through so the upper layers * can process it. This is necessary for 5210 * parts which have no way to setup a ``clear'' * key cache entry. * * XXX do key cache faulting */ if (rs->rs_keyix == HAL_RXKEYIX_INVALID) goto rx_accept; sc->sc_stats.ast_rx_badcrypt++; } if (rs->rs_status & HAL_RXERR_MIC) { sc->sc_stats.ast_rx_badmic++; /* * Do minimal work required to hand off * the 802.11 header for notification. */ /* XXX frag's and qos frames */ len = rs->rs_datalen; if (len >= sizeof (struct ieee80211_frame)) { bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_POSTREAD); ath_handle_micerror(ic, mtod(m, struct ieee80211_frame *), sc->sc_splitmic ? rs->rs_keyix-32 : rs->rs_keyix); } } ifp->if_ierrors++; rx_error: /* * Cleanup any pending partial frame. */ if (sc->sc_rxpending != NULL) { m_freem(sc->sc_rxpending); sc->sc_rxpending = NULL; } /* * When a tap is present pass error frames * that have been requested. By default we * pass decrypt+mic errors but others may be * interesting (e.g. crc). */ if (ieee80211_radiotap_active(ic) && (rs->rs_status & sc->sc_monpass)) { bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_POSTREAD); /* NB: bpf needs the mbuf length setup */ len = rs->rs_datalen; m->m_pkthdr.len = m->m_len = len; bf->bf_m = NULL; ath_rx_tap(ifp, m, rs, rstamp, nf); ieee80211_radiotap_rx_all(ic, m); m_freem(m); } /* XXX pass MIC errors up for s/w reclaculation */ goto rx_next; } rx_accept: /* * Sync and unmap the frame. At this point we're * committed to passing the mbuf somewhere so clear * bf_m; this means a new mbuf must be allocated * when the rx descriptor is setup again to receive * another frame. */ bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_POSTREAD); bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); bf->bf_m = NULL; len = rs->rs_datalen; m->m_len = len; if (rs->rs_more) { /* * Frame spans multiple descriptors; save * it for the next completed descriptor, it * will be used to construct a jumbogram. */ if (sc->sc_rxpending != NULL) { /* NB: max frame size is currently 2 clusters */ sc->sc_stats.ast_rx_toobig++; m_freem(sc->sc_rxpending); } m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = len; sc->sc_rxpending = m; goto rx_next; } else if (sc->sc_rxpending != NULL) { /* * This is the second part of a jumbogram, * chain it to the first mbuf, adjust the * frame length, and clear the rxpending state. */ sc->sc_rxpending->m_next = m; sc->sc_rxpending->m_pkthdr.len += len; m = sc->sc_rxpending; sc->sc_rxpending = NULL; } else { /* * Normal single-descriptor receive; setup * the rcvif and packet length. */ m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = len; } /* * Validate rs->rs_antenna. * * Some users w/ AR9285 NICs have reported crashes * here because rs_antenna field is bogusly large. * Let's enforce the maximum antenna limit of 8 * (and it shouldn't be hard coded, but that's a * separate problem) and if there's an issue, print * out an error and adjust rs_antenna to something * sensible. * * This code should be removed once the actual * root cause of the issue has been identified. * For example, it may be that the rs_antenna * field is only valid for the lsat frame of * an aggregate and it just happens that it is * "mostly" right. (This is a general statement - * the majority of the statistics are only valid * for the last frame in an aggregate. */ if (rs->rs_antenna > 7) { device_printf(sc->sc_dev, "%s: rs_antenna > 7 (%d)\n", __func__, rs->rs_antenna); #ifdef ATH_DEBUG ath_printrxbuf(sc, bf, 0, status == HAL_OK); #endif /* ATH_DEBUG */ rs->rs_antenna = 0; /* XXX better than nothing */ } ifp->if_ipackets++; sc->sc_stats.ast_ant_rx[rs->rs_antenna]++; /* * Populate the rx status block. When there are bpf * listeners we do the additional work to provide * complete status. Otherwise we fill in only the * material required by ieee80211_input. Note that * noise setting is filled in above. */ if (ieee80211_radiotap_active(ic)) ath_rx_tap(ifp, m, rs, rstamp, nf); /* * From this point on we assume the frame is at least * as large as ieee80211_frame_min; verify that. */ if (len < IEEE80211_MIN_LEN) { if (!ieee80211_radiotap_active(ic)) { DPRINTF(sc, ATH_DEBUG_RECV, "%s: short packet %d\n", __func__, len); sc->sc_stats.ast_rx_tooshort++; } else { /* NB: in particular this captures ack's */ ieee80211_radiotap_rx_all(ic, m); } m_freem(m); goto rx_next; } if (IFF_DUMPPKTS(sc, ATH_DEBUG_RECV)) { const HAL_RATE_TABLE *rt = sc->sc_currates; uint8_t rix = rt->rateCodeToIndex[rs->rs_rate]; ieee80211_dump_pkt(ic, mtod(m, caddr_t), len, sc->sc_hwmap[rix].ieeerate, rs->rs_rssi); } m_adj(m, -IEEE80211_CRC_LEN); /* * Locate the node for sender, track state, and then * pass the (referenced) node up to the 802.11 layer * for its use. */ ni = ieee80211_find_rxnode_withkey(ic, mtod(m, const struct ieee80211_frame_min *), rs->rs_keyix == HAL_RXKEYIX_INVALID ? IEEE80211_KEYIX_NONE : rs->rs_keyix); sc->sc_lastrs = rs; #ifdef AH_SUPPORT_AR5416 if (rs->rs_isaggr) sc->sc_stats.ast_rx_agg++; #endif /* AH_SUPPORT_AR5416 */ if (ni != NULL) { /* * Only punt packets for ampdu reorder processing for * 11n nodes; net80211 enforces that M_AMPDU is only * set for 11n nodes. */ if (ni->ni_flags & IEEE80211_NODE_HT) m->m_flags |= M_AMPDU; /* * Sending station is known, dispatch directly. */ type = ieee80211_input(ni, m, rs->rs_rssi, nf); ieee80211_free_node(ni); /* * Arrange to update the last rx timestamp only for * frames from our ap when operating in station mode. * This assumes the rx key is always setup when * associated. */ if (ic->ic_opmode == IEEE80211_M_STA && rs->rs_keyix != HAL_RXKEYIX_INVALID) ngood++; } else { type = ieee80211_input_all(ic, m, rs->rs_rssi, nf); } /* * Track rx rssi and do any rx antenna management. */ ATH_RSSI_LPF(sc->sc_halstats.ns_avgrssi, rs->rs_rssi); if (sc->sc_diversity) { /* * When using fast diversity, change the default rx * antenna if diversity chooses the other antenna 3 * times in a row. */ if (sc->sc_defant != rs->rs_antenna) { if (++sc->sc_rxotherant >= 3) ath_setdefantenna(sc, rs->rs_antenna); } else sc->sc_rxotherant = 0; } /* Newer school diversity - kite specific for now */ /* XXX perhaps migrate the normal diversity code to this? */ if ((ah)->ah_rxAntCombDiversity) (*(ah)->ah_rxAntCombDiversity)(ah, rs, ticks, hz); if (sc->sc_softled) { /* * Blink for any data frame. Otherwise do a * heartbeat-style blink when idle. The latter * is mainly for station mode where we depend on * periodic beacon frames to trigger the poll event. */ if (type == IEEE80211_FC0_TYPE_DATA) { const HAL_RATE_TABLE *rt = sc->sc_currates; ath_led_event(sc, rt->rateCodeToIndex[rs->rs_rate]); } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle) ath_led_event(sc, 0); } rx_next: TAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list); } while (ath_rxbuf_init(sc, bf) == 0); /* rx signal state monitoring */ ath_hal_rxmonitor(ah, &sc->sc_halstats, sc->sc_curchan); if (ngood) sc->sc_lastrx = tsf; CTR2(ATH_KTR_INTR, "ath_rx_proc: npkts=%d, ngood=%d", npkts, ngood); /* Queue DFS tasklet if needed */ if (resched && ath_dfs_tasklet_needed(sc, sc->sc_curchan)) taskqueue_enqueue(sc->sc_tq, &sc->sc_dfstask); /* * Now that all the RX frames were handled that * need to be handled, kick the PCU if there's * been an RXEOL condition. */ ATH_PCU_LOCK(sc); if (resched && sc->sc_kickpcu) { CTR0(ATH_KTR_ERR, "ath_rx_proc: kickpcu"); device_printf(sc->sc_dev, "%s: kickpcu; handled %d packets\n", __func__, npkts); /* XXX rxslink? */ /* * XXX can we hold the PCU lock here? * Are there any net80211 buffer calls involved? */ bf = TAILQ_FIRST(&sc->sc_rxbuf); ath_hal_putrxbuf(ah, bf->bf_daddr); ath_hal_rxena(ah); /* enable recv descriptors */ ath_mode_init(sc); /* set filters, etc. */ ath_hal_startpcurecv(ah); /* re-enable PCU/DMA engine */ ath_hal_intrset(ah, sc->sc_imask); sc->sc_kickpcu = 0; } ATH_PCU_UNLOCK(sc); /* XXX check this inside of IF_LOCK? */ if (resched && (ifp->if_drv_flags & IFF_DRV_OACTIVE) == 0) { #ifdef IEEE80211_SUPPORT_SUPERG ieee80211_ff_age_all(ic, 100); #endif if (!IFQ_IS_EMPTY(&ifp->if_snd)) ath_start(ifp); } #undef PA2DESC ATH_PCU_LOCK(sc); sc->sc_rxproc_cnt--; ATH_PCU_UNLOCK(sc); } static void ath_txq_init(struct ath_softc *sc, struct ath_txq *txq, int qnum) { txq->axq_qnum = qnum; txq->axq_ac = 0; txq->axq_depth = 0; txq->axq_aggr_depth = 0; txq->axq_intrcnt = 0; txq->axq_link = NULL; txq->axq_softc = sc; TAILQ_INIT(&txq->axq_q); TAILQ_INIT(&txq->axq_tidq); ATH_TXQ_LOCK_INIT(sc, txq); } /* * Setup a h/w transmit queue. */ static struct ath_txq * ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) { #define N(a) (sizeof(a)/sizeof(a[0])) struct ath_hal *ah = sc->sc_ah; HAL_TXQ_INFO qi; int qnum; memset(&qi, 0, sizeof(qi)); qi.tqi_subtype = subtype; qi.tqi_aifs = HAL_TXQ_USEDEFAULT; qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; /* * Enable interrupts only for EOL and DESC conditions. * We mark tx descriptors to receive a DESC interrupt * when a tx queue gets deep; otherwise waiting for the * EOL to reap descriptors. Note that this is done to * reduce interrupt load and this only defers reaping * descriptors, never transmitting frames. Aside from * reducing interrupts this also permits more concurrency. * The only potential downside is if the tx queue backs * up in which case the top half of the kernel may backup * due to a lack of tx descriptors. */ qi.tqi_qflags = HAL_TXQ_TXEOLINT_ENABLE | HAL_TXQ_TXDESCINT_ENABLE; qnum = ath_hal_setuptxqueue(ah, qtype, &qi); if (qnum == -1) { /* * NB: don't print a message, this happens * normally on parts with too few tx queues */ return NULL; } if (qnum >= N(sc->sc_txq)) { device_printf(sc->sc_dev, "hal qnum %u out of range, max %zu!\n", qnum, N(sc->sc_txq)); ath_hal_releasetxqueue(ah, qnum); return NULL; } if (!ATH_TXQ_SETUP(sc, qnum)) { ath_txq_init(sc, &sc->sc_txq[qnum], qnum); sc->sc_txqsetup |= 1<sc_txq[qnum]; #undef N } /* * Setup a hardware data transmit queue for the specified * access control. The hal may not support all requested * queues in which case it will return a reference to a * previously setup queue. We record the mapping from ac's * to h/w queues for use by ath_tx_start and also track * the set of h/w queues being used to optimize work in the * transmit interrupt handler and related routines. */ static int ath_tx_setup(struct ath_softc *sc, int ac, int haltype) { #define N(a) (sizeof(a)/sizeof(a[0])) struct ath_txq *txq; if (ac >= N(sc->sc_ac2q)) { device_printf(sc->sc_dev, "AC %u out of range, max %zu!\n", ac, N(sc->sc_ac2q)); return 0; } txq = ath_txq_setup(sc, HAL_TX_QUEUE_DATA, haltype); if (txq != NULL) { txq->axq_ac = ac; sc->sc_ac2q[ac] = txq; return 1; } else return 0; #undef N } /* * Update WME parameters for a transmit queue. */ static int ath_txq_update(struct ath_softc *sc, int ac) { #define ATH_EXPONENT_TO_VALUE(v) ((1<sc_ifp; struct ieee80211com *ic = ifp->if_l2com; struct ath_txq *txq = sc->sc_ac2q[ac]; struct wmeParams *wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; struct ath_hal *ah = sc->sc_ah; HAL_TXQ_INFO qi; ath_hal_gettxqueueprops(ah, txq->axq_qnum, &qi); #ifdef IEEE80211_SUPPORT_TDMA if (sc->sc_tdma) { /* * AIFS is zero so there's no pre-transmit wait. The * burst time defines the slot duration and is configured * through net80211. The QCU is setup to not do post-xmit * back off, lockout all lower-priority QCU's, and fire * off the DMA beacon alert timer which is setup based * on the slot configuration. */ qi.tqi_qflags = HAL_TXQ_TXOKINT_ENABLE | HAL_TXQ_TXERRINT_ENABLE | HAL_TXQ_TXURNINT_ENABLE | HAL_TXQ_TXEOLINT_ENABLE | HAL_TXQ_DBA_GATED | HAL_TXQ_BACKOFF_DISABLE | HAL_TXQ_ARB_LOCKOUT_GLOBAL ; qi.tqi_aifs = 0; /* XXX +dbaprep? */ qi.tqi_readyTime = sc->sc_tdmaslotlen; qi.tqi_burstTime = qi.tqi_readyTime; } else { #endif /* * XXX shouldn't this just use the default flags * used in the previous queue setup? */ qi.tqi_qflags = HAL_TXQ_TXOKINT_ENABLE | HAL_TXQ_TXERRINT_ENABLE | HAL_TXQ_TXDESCINT_ENABLE | HAL_TXQ_TXURNINT_ENABLE | HAL_TXQ_TXEOLINT_ENABLE ; qi.tqi_aifs = wmep->wmep_aifsn; qi.tqi_cwmin = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); qi.tqi_readyTime = 0; qi.tqi_burstTime = ATH_TXOP_TO_US(wmep->wmep_txopLimit); #ifdef IEEE80211_SUPPORT_TDMA } #endif DPRINTF(sc, ATH_DEBUG_RESET, "%s: Q%u qflags 0x%x aifs %u cwmin %u cwmax %u burstTime %u\n", __func__, txq->axq_qnum, qi.tqi_qflags, qi.tqi_aifs, qi.tqi_cwmin, qi.tqi_cwmax, qi.tqi_burstTime); if (!ath_hal_settxqueueprops(ah, txq->axq_qnum, &qi)) { if_printf(ifp, "unable to update hardware queue " "parameters for %s traffic!\n", ieee80211_wme_acnames[ac]); return 0; } else { ath_hal_resettxqueue(ah, txq->axq_qnum); /* push to h/w */ return 1; } #undef ATH_TXOP_TO_US #undef ATH_EXPONENT_TO_VALUE } /* * Callback from the 802.11 layer to update WME parameters. */ static int ath_wme_update(struct ieee80211com *ic) { struct ath_softc *sc = ic->ic_ifp->if_softc; return !ath_txq_update(sc, WME_AC_BE) || !ath_txq_update(sc, WME_AC_BK) || !ath_txq_update(sc, WME_AC_VI) || !ath_txq_update(sc, WME_AC_VO) ? EIO : 0; } /* * Reclaim resources for a setup queue. */ static void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) { ath_hal_releasetxqueue(sc->sc_ah, txq->axq_qnum); ATH_TXQ_LOCK_DESTROY(txq); sc->sc_txqsetup &= ~(1<axq_qnum); } /* * Reclaim all tx queue resources. */ static void ath_tx_cleanup(struct ath_softc *sc) { int i; ATH_TXBUF_LOCK_DESTROY(sc); for (i = 0; i < HAL_NUM_TX_QUEUES; i++) if (ATH_TXQ_SETUP(sc, i)) ath_tx_cleanupq(sc, &sc->sc_txq[i]); } /* * Return h/w rate index for an IEEE rate (w/o basic rate bit) * using the current rates in sc_rixmap. */ int ath_tx_findrix(const struct ath_softc *sc, uint8_t rate) { int rix = sc->sc_rixmap[rate]; /* NB: return lowest rix for invalid rate */ return (rix == 0xff ? 0 : rix); } static void ath_tx_update_stats(struct ath_softc *sc, struct ath_tx_status *ts, struct ath_buf *bf) { struct ieee80211_node *ni = bf->bf_node; struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; int sr, lr, pri; if (ts->ts_status == 0) { u_int8_t txant = ts->ts_antenna; sc->sc_stats.ast_ant_tx[txant]++; sc->sc_ant_tx[txant]++; if (ts->ts_finaltsi != 0) sc->sc_stats.ast_tx_altrate++; pri = M_WME_GETAC(bf->bf_m); if (pri >= WME_AC_VO) ic->ic_wme.wme_hipri_traffic++; if ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0) ni->ni_inact = ni->ni_inact_reload; } else { if (ts->ts_status & HAL_TXERR_XRETRY) sc->sc_stats.ast_tx_xretries++; if (ts->ts_status & HAL_TXERR_FIFO) sc->sc_stats.ast_tx_fifoerr++; if (ts->ts_status & HAL_TXERR_FILT) sc->sc_stats.ast_tx_filtered++; if (ts->ts_status & HAL_TXERR_XTXOP) sc->sc_stats.ast_tx_xtxop++; if (ts->ts_status & HAL_TXERR_TIMER_EXPIRED) sc->sc_stats.ast_tx_timerexpired++; if (ts->ts_status & HAL_TX_DATA_UNDERRUN) sc->sc_stats.ast_tx_data_underrun++; if (ts->ts_status & HAL_TX_DELIM_UNDERRUN) sc->sc_stats.ast_tx_delim_underrun++; if (bf->bf_m->m_flags & M_FF) sc->sc_stats.ast_ff_txerr++; } /* XXX when is this valid? */ if (ts->ts_status & HAL_TX_DESC_CFG_ERR) sc->sc_stats.ast_tx_desccfgerr++; sr = ts->ts_shortretry; lr = ts->ts_longretry; sc->sc_stats.ast_tx_shortretry += sr; sc->sc_stats.ast_tx_longretry += lr; } /* * The default completion. If fail is 1, this means * "please don't retry the frame, and just return -1 status * to the net80211 stack. */ void ath_tx_default_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) { struct ath_tx_status *ts = &bf->bf_status.ds_txstat; int st; if (fail == 1) st = -1; else st = ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0) ? ts->ts_status : HAL_TXERR_XRETRY; if (bf->bf_state.bfs_dobaw) device_printf(sc->sc_dev, "%s: bf %p: seqno %d: dobaw should've been cleared!\n", __func__, bf, SEQNO(bf->bf_state.bfs_seqno)); if (bf->bf_next != NULL) device_printf(sc->sc_dev, "%s: bf %p: seqno %d: bf_next not NULL!\n", __func__, bf, SEQNO(bf->bf_state.bfs_seqno)); /* * Do any tx complete callback. Note this must * be done before releasing the node reference. * This will free the mbuf, release the net80211 * node and recycle the ath_buf. */ ath_tx_freebuf(sc, bf, st); } /* * Update rate control with the given completion status. */ void ath_tx_update_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_rc_series *rc, struct ath_tx_status *ts, int frmlen, int nframes, int nbad) { struct ath_node *an; /* Only for unicast frames */ if (ni == NULL) return; an = ATH_NODE(ni); if ((ts->ts_status & HAL_TXERR_FILT) == 0) { ATH_NODE_LOCK(an); ath_rate_tx_complete(sc, an, rc, ts, frmlen, nframes, nbad); ATH_NODE_UNLOCK(an); } } /* * Update the busy status of the last frame on the free list. * When doing TDMA, the busy flag tracks whether the hardware * currently points to this buffer or not, and thus gated DMA * may restart by re-reading the last descriptor in this * buffer. * * This should be called in the completion function once one * of the buffers has been used. */ static void ath_tx_update_busy(struct ath_softc *sc) { struct ath_buf *last; /* * Since the last frame may still be marked * as ATH_BUF_BUSY, unmark it here before * finishing the frame processing. * Since we've completed a frame (aggregate * or otherwise), the hardware has moved on * and is no longer referencing the previous * descriptor. */ ATH_TXBUF_LOCK_ASSERT(sc); last = TAILQ_LAST(&sc->sc_txbuf, ath_bufhead_s); if (last != NULL) last->bf_flags &= ~ATH_BUF_BUSY; } /* * Process completed xmit descriptors from the specified queue. * Kick the packet scheduler if needed. This can occur from this * particular task. */ static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq, int dosched) { struct ath_hal *ah = sc->sc_ah; struct ath_buf *bf; struct ath_desc *ds; struct ath_tx_status *ts; struct ieee80211_node *ni; struct ath_node *an; int nacked; HAL_STATUS status; DPRINTF(sc, ATH_DEBUG_TX_PROC, "%s: tx queue %u head %p link %p\n", __func__, txq->axq_qnum, (caddr_t)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum), txq->axq_link); nacked = 0; for (;;) { ATH_TXQ_LOCK(txq); txq->axq_intrcnt = 0; /* reset periodic desc intr count */ bf = TAILQ_FIRST(&txq->axq_q); if (bf == NULL) { ATH_TXQ_UNLOCK(txq); break; } ds = bf->bf_lastds; /* XXX must be setup correctly! */ ts = &bf->bf_status.ds_txstat; status = ath_hal_txprocdesc(ah, ds, ts); #ifdef ATH_DEBUG if (sc->sc_debug & ATH_DEBUG_XMIT_DESC) ath_printtxbuf(sc, bf, txq->axq_qnum, 0, status == HAL_OK); #endif if (status == HAL_EINPROGRESS) { ATH_TXQ_UNLOCK(txq); break; } ATH_TXQ_REMOVE(txq, bf, bf_list); #ifdef IEEE80211_SUPPORT_TDMA if (txq->axq_depth > 0) { /* * More frames follow. Mark the buffer busy * so it's not re-used while the hardware may * still re-read the link field in the descriptor. * * Use the last buffer in an aggregate as that * is where the hardware may be - intermediate * descriptors won't be "busy". */ bf->bf_last->bf_flags |= ATH_BUF_BUSY; } else #else if (txq->axq_depth == 0) #endif txq->axq_link = NULL; if (bf->bf_state.bfs_aggr) txq->axq_aggr_depth--; ni = bf->bf_node; /* * If unicast frame was ack'd update RSSI, * including the last rx time used to * workaround phantom bmiss interrupts. */ if (ni != NULL && ts->ts_status == 0 && ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0)) { nacked++; sc->sc_stats.ast_tx_rssi = ts->ts_rssi; ATH_RSSI_LPF(sc->sc_halstats.ns_avgtxrssi, ts->ts_rssi); } ATH_TXQ_UNLOCK(txq); /* If unicast frame, update general statistics */ if (ni != NULL) { an = ATH_NODE(ni); /* update statistics */ ath_tx_update_stats(sc, ts, bf); } /* * Call the completion handler. * The completion handler is responsible for * calling the rate control code. * * Frames with no completion handler get the * rate control code called here. */ if (bf->bf_comp == NULL) { if ((ts->ts_status & HAL_TXERR_FILT) == 0 && (bf->bf_txflags & HAL_TXDESC_NOACK) == 0) { /* * XXX assume this isn't an aggregate * frame. */ ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, ts, bf->bf_state.bfs_pktlen, 1, (ts->ts_status == 0 ? 0 : 1)); } ath_tx_default_comp(sc, bf, 0); } else bf->bf_comp(sc, bf, 0); } #ifdef IEEE80211_SUPPORT_SUPERG /* * Flush fast-frame staging queue when traffic slows. */ if (txq->axq_depth <= 1) ieee80211_ff_flush(ic, txq->axq_ac); #endif /* Kick the TXQ scheduler */ if (dosched) { ATH_TXQ_LOCK(txq); ath_txq_sched(sc, txq); ATH_TXQ_UNLOCK(txq); } return nacked; } #define TXQACTIVE(t, q) ( (t) & (1 << (q))) /* * Deferred processing of transmit interrupt; special-cased * for a single hardware transmit queue (e.g. 5210 and 5211). */ static void ath_tx_proc_q0(void *arg, int npending) { struct ath_softc *sc = arg; struct ifnet *ifp = sc->sc_ifp; uint32_t txqs; ATH_PCU_LOCK(sc); sc->sc_txproc_cnt++; txqs = sc->sc_txq_active; sc->sc_txq_active &= ~txqs; ATH_PCU_UNLOCK(sc); if (TXQACTIVE(txqs, 0) && ath_tx_processq(sc, &sc->sc_txq[0], 1)) /* XXX why is lastrx updated in tx code? */ sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); if (TXQACTIVE(txqs, sc->sc_cabq->axq_qnum)) ath_tx_processq(sc, sc->sc_cabq, 1); IF_LOCK(&ifp->if_snd); ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; IF_UNLOCK(&ifp->if_snd); sc->sc_wd_timer = 0; if (sc->sc_softled) ath_led_event(sc, sc->sc_txrix); ATH_PCU_LOCK(sc); sc->sc_txproc_cnt--; ATH_PCU_UNLOCK(sc); ath_start(ifp); } /* * Deferred processing of transmit interrupt; special-cased * for four hardware queues, 0-3 (e.g. 5212 w/ WME support). */ static void ath_tx_proc_q0123(void *arg, int npending) { struct ath_softc *sc = arg; struct ifnet *ifp = sc->sc_ifp; int nacked; uint32_t txqs; ATH_PCU_LOCK(sc); sc->sc_txproc_cnt++; txqs = sc->sc_txq_active; sc->sc_txq_active &= ~txqs; ATH_PCU_UNLOCK(sc); /* * Process each active queue. */ nacked = 0; if (TXQACTIVE(txqs, 0)) nacked += ath_tx_processq(sc, &sc->sc_txq[0], 1); if (TXQACTIVE(txqs, 1)) nacked += ath_tx_processq(sc, &sc->sc_txq[1], 1); if (TXQACTIVE(txqs, 2)) nacked += ath_tx_processq(sc, &sc->sc_txq[2], 1); if (TXQACTIVE(txqs, 3)) nacked += ath_tx_processq(sc, &sc->sc_txq[3], 1); if (TXQACTIVE(txqs, sc->sc_cabq->axq_qnum)) ath_tx_processq(sc, sc->sc_cabq, 1); if (nacked) sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); IF_LOCK(&ifp->if_snd); ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; IF_UNLOCK(&ifp->if_snd); sc->sc_wd_timer = 0; if (sc->sc_softled) ath_led_event(sc, sc->sc_txrix); ATH_PCU_LOCK(sc); sc->sc_txproc_cnt--; ATH_PCU_UNLOCK(sc); ath_start(ifp); } /* * Deferred processing of transmit interrupt. */ static void ath_tx_proc(void *arg, int npending) { struct ath_softc *sc = arg; struct ifnet *ifp = sc->sc_ifp; int i, nacked; uint32_t txqs; ATH_PCU_LOCK(sc); sc->sc_txproc_cnt++; txqs = sc->sc_txq_active; sc->sc_txq_active &= ~txqs; ATH_PCU_UNLOCK(sc); /* * Process each active queue. */ nacked = 0; for (i = 0; i < HAL_NUM_TX_QUEUES; i++) if (ATH_TXQ_SETUP(sc, i) && TXQACTIVE(txqs, i)) nacked += ath_tx_processq(sc, &sc->sc_txq[i], 1); if (nacked) sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); /* XXX check this inside of IF_LOCK? */ IF_LOCK(&ifp->if_snd); ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; IF_UNLOCK(&ifp->if_snd); sc->sc_wd_timer = 0; if (sc->sc_softled) ath_led_event(sc, sc->sc_txrix); ATH_PCU_LOCK(sc); sc->sc_txproc_cnt--; ATH_PCU_UNLOCK(sc); ath_start(ifp); } #undef TXQACTIVE /* * Deferred processing of TXQ rescheduling. */ static void ath_txq_sched_tasklet(void *arg, int npending) { struct ath_softc *sc = arg; int i; /* XXX is skipping ok? */ ATH_PCU_LOCK(sc); #if 0 if (sc->sc_inreset_cnt > 0) { device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; skipping\n", __func__); ATH_PCU_UNLOCK(sc); return; } #endif sc->sc_txproc_cnt++; ATH_PCU_UNLOCK(sc); for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { if (ATH_TXQ_SETUP(sc, i)) { ATH_TXQ_LOCK(&sc->sc_txq[i]); ath_txq_sched(sc, &sc->sc_txq[i]); ATH_TXQ_UNLOCK(&sc->sc_txq[i]); } } ATH_PCU_LOCK(sc); sc->sc_txproc_cnt--; ATH_PCU_UNLOCK(sc); } /* * Return a buffer to the pool and update the 'busy' flag on the * previous 'tail' entry. * * This _must_ only be called when the buffer is involved in a completed * TX. The logic is that if it was part of an active TX, the previous * buffer on the list is now not involved in a halted TX DMA queue, waiting * for restart (eg for TDMA.) * * The caller must free the mbuf and recycle the node reference. */ void ath_freebuf(struct ath_softc *sc, struct ath_buf *bf) { bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_POSTWRITE); KASSERT((bf->bf_node == NULL), ("%s: bf->bf_node != NULL\n", __func__)); KASSERT((bf->bf_m == NULL), ("%s: bf->bf_m != NULL\n", __func__)); ATH_TXBUF_LOCK(sc); ath_tx_update_busy(sc); TAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); ATH_TXBUF_UNLOCK(sc); } /* * This is currently used by ath_tx_draintxq() and * ath_tx_tid_free_pkts(). * * It recycles a single ath_buf. */ void ath_tx_freebuf(struct ath_softc *sc, struct ath_buf *bf, int status) { struct ieee80211_node *ni = bf->bf_node; struct mbuf *m0 = bf->bf_m; bf->bf_node = NULL; bf->bf_m = NULL; /* Free the buffer, it's not needed any longer */ ath_freebuf(sc, bf); if (ni != NULL) { /* * Do any callback and reclaim the node reference. */ if (m0->m_flags & M_TXCB) ieee80211_process_callback(ni, m0, status); ieee80211_free_node(ni); } m_freem(m0); /* * XXX the buffer used to be freed -after-, but the DMA map was * freed where ath_freebuf() now is. I've no idea what this * will do. */ } void ath_tx_draintxq(struct ath_softc *sc, struct ath_txq *txq) { #ifdef ATH_DEBUG struct ath_hal *ah = sc->sc_ah; #endif struct ath_buf *bf; u_int ix; /* * NB: this assumes output has been stopped and * we do not need to block ath_tx_proc */ ATH_TXBUF_LOCK(sc); bf = TAILQ_LAST(&sc->sc_txbuf, ath_bufhead_s); if (bf != NULL) bf->bf_flags &= ~ATH_BUF_BUSY; ATH_TXBUF_UNLOCK(sc); for (ix = 0;; ix++) { ATH_TXQ_LOCK(txq); bf = TAILQ_FIRST(&txq->axq_q); if (bf == NULL) { txq->axq_link = NULL; ATH_TXQ_UNLOCK(txq); break; } ATH_TXQ_REMOVE(txq, bf, bf_list); if (bf->bf_state.bfs_aggr) txq->axq_aggr_depth--; #ifdef ATH_DEBUG if (sc->sc_debug & ATH_DEBUG_RESET) { struct ieee80211com *ic = sc->sc_ifp->if_l2com; ath_printtxbuf(sc, bf, txq->axq_qnum, ix, ath_hal_txprocdesc(ah, bf->bf_lastds, &bf->bf_status.ds_txstat) == HAL_OK); ieee80211_dump_pkt(ic, mtod(bf->bf_m, const uint8_t *), bf->bf_m->m_len, 0, -1); } #endif /* ATH_DEBUG */ /* * Since we're now doing magic in the completion * functions, we -must- call it for aggregation * destinations or BAW tracking will get upset. */ /* * Clear ATH_BUF_BUSY; the completion handler * will free the buffer. */ ATH_TXQ_UNLOCK(txq); bf->bf_flags &= ~ATH_BUF_BUSY; if (bf->bf_comp) bf->bf_comp(sc, bf, 1); else ath_tx_default_comp(sc, bf, 1); } /* * Drain software queued frames which are on * active TIDs. */ ath_tx_txq_drain(sc, txq); } static void ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq) { struct ath_hal *ah = sc->sc_ah; DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n", __func__, txq->axq_qnum, (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, txq->axq_qnum), txq->axq_link); (void) ath_hal_stoptxdma(ah, txq->axq_qnum); } static int ath_stoptxdma(struct ath_softc *sc) { struct ath_hal *ah = sc->sc_ah; int i; /* XXX return value */ if (sc->sc_invalid) return 0; if (!sc->sc_invalid) { /* don't touch the hardware if marked invalid */ DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n", __func__, sc->sc_bhalq, (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, sc->sc_bhalq), NULL); (void) ath_hal_stoptxdma(ah, sc->sc_bhalq); for (i = 0; i < HAL_NUM_TX_QUEUES; i++) if (ATH_TXQ_SETUP(sc, i)) ath_tx_stopdma(sc, &sc->sc_txq[i]); } return 1; } /* * Drain the transmit queues and reclaim resources. */ static void ath_draintxq(struct ath_softc *sc, ATH_RESET_TYPE reset_type) { #ifdef ATH_DEBUG struct ath_hal *ah = sc->sc_ah; #endif struct ifnet *ifp = sc->sc_ifp; int i; (void) ath_stoptxdma(sc); for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { /* * XXX TODO: should we just handle the completed TX frames * here, whether or not the reset is a full one or not? */ if (ATH_TXQ_SETUP(sc, i)) { if (reset_type == ATH_RESET_NOLOSS) ath_tx_processq(sc, &sc->sc_txq[i], 0); else ath_tx_draintxq(sc, &sc->sc_txq[i]); } } #ifdef ATH_DEBUG if (sc->sc_debug & ATH_DEBUG_RESET) { struct ath_buf *bf = TAILQ_FIRST(&sc->sc_bbuf); if (bf != NULL && bf->bf_m != NULL) { ath_printtxbuf(sc, bf, sc->sc_bhalq, 0, ath_hal_txprocdesc(ah, bf->bf_lastds, &bf->bf_status.ds_txstat) == HAL_OK); ieee80211_dump_pkt(ifp->if_l2com, mtod(bf->bf_m, const uint8_t *), bf->bf_m->m_len, 0, -1); } } #endif /* ATH_DEBUG */ IF_LOCK(&ifp->if_snd); ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; IF_UNLOCK(&ifp->if_snd); sc->sc_wd_timer = 0; } /* * Disable the receive h/w in preparation for a reset. */ static void ath_stoprecv(struct ath_softc *sc, int dodelay) { #define PA2DESC(_sc, _pa) \ ((struct ath_desc *)((caddr_t)(_sc)->sc_rxdma.dd_desc + \ ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr))) struct ath_hal *ah = sc->sc_ah; ath_hal_stoppcurecv(ah); /* disable PCU */ ath_hal_setrxfilter(ah, 0); /* clear recv filter */ ath_hal_stopdmarecv(ah); /* disable DMA engine */ if (dodelay) DELAY(3000); /* 3ms is long enough for 1 frame */ #ifdef ATH_DEBUG if (sc->sc_debug & (ATH_DEBUG_RESET | ATH_DEBUG_FATAL)) { struct ath_buf *bf; u_int ix; device_printf(sc->sc_dev, "%s: rx queue %p, link %p\n", __func__, (caddr_t)(uintptr_t) ath_hal_getrxbuf(ah), sc->sc_rxlink); ix = 0; TAILQ_FOREACH(bf, &sc->sc_rxbuf, bf_list) { struct ath_desc *ds = bf->bf_desc; struct ath_rx_status *rs = &bf->bf_status.ds_rxstat; HAL_STATUS status = ath_hal_rxprocdesc(ah, ds, bf->bf_daddr, PA2DESC(sc, ds->ds_link), rs); if (status == HAL_OK || (sc->sc_debug & ATH_DEBUG_FATAL)) ath_printrxbuf(sc, bf, ix, status == HAL_OK); ix++; } } #endif if (sc->sc_rxpending != NULL) { m_freem(sc->sc_rxpending); sc->sc_rxpending = NULL; } sc->sc_rxlink = NULL; /* just in case */ #undef PA2DESC } /* * Enable the receive h/w following a reset. */ static int ath_startrecv(struct ath_softc *sc) { struct ath_hal *ah = sc->sc_ah; struct ath_buf *bf; sc->sc_rxlink = NULL; sc->sc_rxpending = NULL; TAILQ_FOREACH(bf, &sc->sc_rxbuf, bf_list) { int error = ath_rxbuf_init(sc, bf); if (error != 0) { DPRINTF(sc, ATH_DEBUG_RECV, "%s: ath_rxbuf_init failed %d\n", __func__, error); return error; } } bf = TAILQ_FIRST(&sc->sc_rxbuf); ath_hal_putrxbuf(ah, bf->bf_daddr); ath_hal_rxena(ah); /* enable recv descriptors */ ath_mode_init(sc); /* set filters, etc. */ ath_hal_startpcurecv(ah); /* re-enable PCU/DMA engine */ return 0; } /* * Update internal state after a channel change. */ static void ath_chan_change(struct ath_softc *sc, struct ieee80211_channel *chan) { enum ieee80211_phymode mode; /* * Change channels and update the h/w rate map * if we're switching; e.g. 11a to 11b/g. */ mode = ieee80211_chan2mode(chan); if (mode != sc->sc_curmode) ath_setcurmode(sc, mode); sc->sc_curchan = chan; } /* * Set/change channels. If the channel is really being changed, * it's done by resetting the chip. To accomplish this we must * first cleanup any pending DMA, then restart stuff after a la * ath_init. */ static int ath_chan_set(struct ath_softc *sc, struct ieee80211_channel *chan) { struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; struct ath_hal *ah = sc->sc_ah; int ret = 0; /* Treat this as an interface reset */ ATH_PCU_UNLOCK_ASSERT(sc); ATH_UNLOCK_ASSERT(sc); /* (Try to) stop TX/RX from occuring */ taskqueue_block(sc->sc_tq); ATH_PCU_LOCK(sc); ath_hal_intrset(ah, 0); /* Stop new RX/TX completion */ ath_txrx_stop_locked(sc); /* Stop pending RX/TX completion */ if (ath_reset_grablock(sc, 1) == 0) { device_printf(sc->sc_dev, "%s: concurrent reset! Danger!\n", __func__); } ATH_PCU_UNLOCK(sc); DPRINTF(sc, ATH_DEBUG_RESET, "%s: %u (%u MHz, flags 0x%x)\n", __func__, ieee80211_chan2ieee(ic, chan), chan->ic_freq, chan->ic_flags); if (chan != sc->sc_curchan) { HAL_STATUS status; /* * To switch channels clear any pending DMA operations; * wait long enough for the RX fifo to drain, reset the * hardware at the new frequency, and then re-enable * the relevant bits of the h/w. */ #if 0 ath_hal_intrset(ah, 0); /* disable interrupts */ #endif ath_stoprecv(sc, 1); /* turn off frame recv */ /* * First, handle completed TX/RX frames. */ ath_rx_proc(sc, 0); ath_draintxq(sc, ATH_RESET_NOLOSS); /* * Next, flush the non-scheduled frames. */ ath_draintxq(sc, ATH_RESET_FULL); /* clear pending tx frames */ if (!ath_hal_reset(ah, sc->sc_opmode, chan, AH_TRUE, &status)) { if_printf(ifp, "%s: unable to reset " "channel %u (%u MHz, flags 0x%x), hal status %u\n", __func__, ieee80211_chan2ieee(ic, chan), chan->ic_freq, chan->ic_flags, status); ret = EIO; goto finish; } sc->sc_diversity = ath_hal_getdiversity(ah); /* Let DFS at it in case it's a DFS channel */ ath_dfs_radar_enable(sc, chan); /* * Re-enable rx framework. */ if (ath_startrecv(sc) != 0) { if_printf(ifp, "%s: unable to restart recv logic\n", __func__); ret = EIO; goto finish; } /* * Change channels and update the h/w rate map * if we're switching; e.g. 11a to 11b/g. */ ath_chan_change(sc, chan); /* * Reset clears the beacon timers; reset them * here if needed. */ if (sc->sc_beacons) { /* restart beacons */ #ifdef IEEE80211_SUPPORT_TDMA if (sc->sc_tdma) ath_tdma_config(sc, NULL); else #endif ath_beacon_config(sc, NULL); } /* * Re-enable interrupts. */ #if 0 ath_hal_intrset(ah, sc->sc_imask); #endif } finish: ATH_PCU_LOCK(sc); sc->sc_inreset_cnt--; /* XXX only do this if sc_inreset_cnt == 0? */ ath_hal_intrset(ah, sc->sc_imask); ATH_PCU_UNLOCK(sc); IF_LOCK(&ifp->if_snd); ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; IF_UNLOCK(&ifp->if_snd); ath_txrx_start(sc); /* XXX ath_start? */ return ret; } /* * Periodically recalibrate the PHY to account * for temperature/environment changes. */ static void ath_calibrate(void *arg) { struct ath_softc *sc = arg; struct ath_hal *ah = sc->sc_ah; struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; HAL_BOOL longCal, isCalDone; HAL_BOOL aniCal, shortCal = AH_FALSE; int nextcal; if (ic->ic_flags & IEEE80211_F_SCAN) /* defer, off channel */ goto restart; longCal = (ticks - sc->sc_lastlongcal >= ath_longcalinterval*hz); aniCal = (ticks - sc->sc_lastani >= ath_anicalinterval*hz/1000); if (sc->sc_doresetcal) shortCal = (ticks - sc->sc_lastshortcal >= ath_shortcalinterval*hz/1000); DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: shortCal=%d; longCal=%d; aniCal=%d\n", __func__, shortCal, longCal, aniCal); if (aniCal) { sc->sc_stats.ast_ani_cal++; sc->sc_lastani = ticks; ath_hal_ani_poll(ah, sc->sc_curchan); } if (longCal) { sc->sc_stats.ast_per_cal++; sc->sc_lastlongcal = ticks; if (ath_hal_getrfgain(ah) == HAL_RFGAIN_NEED_CHANGE) { /* * Rfgain is out of bounds, reset the chip * to load new gain values. */ DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: rfgain change\n", __func__); sc->sc_stats.ast_per_rfgain++; sc->sc_resetcal = 0; sc->sc_doresetcal = AH_TRUE; taskqueue_enqueue(sc->sc_tq, &sc->sc_resettask); callout_reset(&sc->sc_cal_ch, 1, ath_calibrate, sc); return; } /* * If this long cal is after an idle period, then * reset the data collection state so we start fresh. */ if (sc->sc_resetcal) { (void) ath_hal_calreset(ah, sc->sc_curchan); sc->sc_lastcalreset = ticks; sc->sc_lastshortcal = ticks; sc->sc_resetcal = 0; sc->sc_doresetcal = AH_TRUE; } } /* Only call if we're doing a short/long cal, not for ANI calibration */ if (shortCal || longCal) { if (ath_hal_calibrateN(ah, sc->sc_curchan, longCal, &isCalDone)) { if (longCal) { /* * Calibrate noise floor data again in case of change. */ ath_hal_process_noisefloor(ah); } } else { DPRINTF(sc, ATH_DEBUG_ANY, "%s: calibration of channel %u failed\n", __func__, sc->sc_curchan->ic_freq); sc->sc_stats.ast_per_calfail++; } if (shortCal) sc->sc_lastshortcal = ticks; } if (!isCalDone) { restart: /* * Use a shorter interval to potentially collect multiple * data samples required to complete calibration. Once * we're told the work is done we drop back to a longer * interval between requests. We're more aggressive doing * work when operating as an AP to improve operation right * after startup. */ sc->sc_lastshortcal = ticks; nextcal = ath_shortcalinterval*hz/1000; if (sc->sc_opmode != HAL_M_HOSTAP) nextcal *= 10; sc->sc_doresetcal = AH_TRUE; } else { /* nextcal should be the shortest time for next event */ nextcal = ath_longcalinterval*hz; if (sc->sc_lastcalreset == 0) sc->sc_lastcalreset = sc->sc_lastlongcal; else if (ticks - sc->sc_lastcalreset >= ath_resetcalinterval*hz) sc->sc_resetcal = 1; /* setup reset next trip */ sc->sc_doresetcal = AH_FALSE; } /* ANI calibration may occur more often than short/long/resetcal */ if (ath_anicalinterval > 0) nextcal = MIN(nextcal, ath_anicalinterval*hz/1000); if (nextcal != 0) { DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: next +%u (%sisCalDone)\n", __func__, nextcal, isCalDone ? "" : "!"); callout_reset(&sc->sc_cal_ch, nextcal, ath_calibrate, sc); } else { DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: calibration disabled\n", __func__); /* NB: don't rearm timer */ } } static void ath_scan_start(struct ieee80211com *ic) { struct ifnet *ifp = ic->ic_ifp; struct ath_softc *sc = ifp->if_softc; struct ath_hal *ah = sc->sc_ah; u_int32_t rfilt; /* XXX calibration timer? */ ATH_LOCK(sc); sc->sc_scanning = 1; sc->sc_syncbeacon = 0; rfilt = ath_calcrxfilter(sc); ATH_UNLOCK(sc); ATH_PCU_LOCK(sc); ath_hal_setrxfilter(ah, rfilt); ath_hal_setassocid(ah, ifp->if_broadcastaddr, 0); ATH_PCU_UNLOCK(sc); DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0\n", __func__, rfilt, ether_sprintf(ifp->if_broadcastaddr)); } static void ath_scan_end(struct ieee80211com *ic) { struct ifnet *ifp = ic->ic_ifp; struct ath_softc *sc = ifp->if_softc; struct ath_hal *ah = sc->sc_ah; u_int32_t rfilt; ATH_LOCK(sc); sc->sc_scanning = 0; rfilt = ath_calcrxfilter(sc); ATH_UNLOCK(sc); ATH_PCU_LOCK(sc); ath_hal_setrxfilter(ah, rfilt); ath_hal_setassocid(ah, sc->sc_curbssid, sc->sc_curaid); ath_hal_process_noisefloor(ah); ATH_PCU_UNLOCK(sc); DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0x%x\n", __func__, rfilt, ether_sprintf(sc->sc_curbssid), sc->sc_curaid); } /* * For now, just do a channel change. * * Later, we'll go through the hard slog of suspending tx/rx, changing rate * control state and resetting the hardware without dropping frames out * of the queue. * * The unfortunate trouble here is making absolutely sure that the * channel width change has propagated enough so the hardware * absolutely isn't handed bogus frames for it's current operating * mode. (Eg, 40MHz frames in 20MHz mode.) Since TX and RX can and * does occur in parallel, we need to make certain we've blocked * any further ongoing TX (and RX, that can cause raw TX) * before we do this. */ static void ath_update_chw(struct ieee80211com *ic) { struct ifnet *ifp = ic->ic_ifp; struct ath_softc *sc = ifp->if_softc; DPRINTF(sc, ATH_DEBUG_STATE, "%s: called\n", __func__); ath_set_channel(ic); } static void ath_set_channel(struct ieee80211com *ic) { struct ifnet *ifp = ic->ic_ifp; struct ath_softc *sc = ifp->if_softc; (void) ath_chan_set(sc, ic->ic_curchan); /* * If we are returning to our bss channel then mark state * so the next recv'd beacon's tsf will be used to sync the * beacon timers. Note that since we only hear beacons in * sta/ibss mode this has no effect in other operating modes. */ ATH_LOCK(sc); if (!sc->sc_scanning && ic->ic_curchan == ic->ic_bsschan) sc->sc_syncbeacon = 1; ATH_UNLOCK(sc); } /* * Walk the vap list and check if there any vap's in RUN state. */ static int ath_isanyrunningvaps(struct ieee80211vap *this) { struct ieee80211com *ic = this->iv_ic; struct ieee80211vap *vap; IEEE80211_LOCK_ASSERT(ic); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { if (vap != this && vap->iv_state >= IEEE80211_S_RUN) return 1; } return 0; } static int ath_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211com *ic = vap->iv_ic; struct ath_softc *sc = ic->ic_ifp->if_softc; struct ath_vap *avp = ATH_VAP(vap); struct ath_hal *ah = sc->sc_ah; struct ieee80211_node *ni = NULL; int i, error, stamode; u_int32_t rfilt; int csa_run_transition = 0; static const HAL_LED_STATE leds[] = { HAL_LED_INIT, /* IEEE80211_S_INIT */ HAL_LED_SCAN, /* IEEE80211_S_SCAN */ HAL_LED_AUTH, /* IEEE80211_S_AUTH */ HAL_LED_ASSOC, /* IEEE80211_S_ASSOC */ HAL_LED_RUN, /* IEEE80211_S_CAC */ HAL_LED_RUN, /* IEEE80211_S_RUN */ HAL_LED_RUN, /* IEEE80211_S_CSA */ HAL_LED_RUN, /* IEEE80211_S_SLEEP */ }; DPRINTF(sc, ATH_DEBUG_STATE, "%s: %s -> %s\n", __func__, ieee80211_state_name[vap->iv_state], ieee80211_state_name[nstate]); /* * net80211 _should_ have the comlock asserted at this point. * There are some comments around the calls to vap->iv_newstate * which indicate that it (newstate) may end up dropping the * lock. This and the subsequent lock assert check after newstate * are an attempt to catch these and figure out how/why. */ IEEE80211_LOCK_ASSERT(ic); if (vap->iv_state == IEEE80211_S_CSA && nstate == IEEE80211_S_RUN) csa_run_transition = 1; callout_drain(&sc->sc_cal_ch); ath_hal_setledstate(ah, leds[nstate]); /* set LED */ if (nstate == IEEE80211_S_SCAN) { /* * Scanning: turn off beacon miss and don't beacon. * Mark beacon state so when we reach RUN state we'll * [re]setup beacons. Unblock the task q thread so * deferred interrupt processing is done. */ ath_hal_intrset(ah, sc->sc_imask &~ (HAL_INT_SWBA | HAL_INT_BMISS)); sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); sc->sc_beacons = 0; taskqueue_unblock(sc->sc_tq); } ni = ieee80211_ref_node(vap->iv_bss); rfilt = ath_calcrxfilter(sc); stamode = (vap->iv_opmode == IEEE80211_M_STA || vap->iv_opmode == IEEE80211_M_AHDEMO || vap->iv_opmode == IEEE80211_M_IBSS); if (stamode && nstate == IEEE80211_S_RUN) { sc->sc_curaid = ni->ni_associd; IEEE80211_ADDR_COPY(sc->sc_curbssid, ni->ni_bssid); ath_hal_setassocid(ah, sc->sc_curbssid, sc->sc_curaid); } DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0x%x\n", __func__, rfilt, ether_sprintf(sc->sc_curbssid), sc->sc_curaid); ath_hal_setrxfilter(ah, rfilt); /* XXX is this to restore keycache on resume? */ if (vap->iv_opmode != IEEE80211_M_STA && (vap->iv_flags & IEEE80211_F_PRIVACY)) { for (i = 0; i < IEEE80211_WEP_NKID; i++) if (ath_hal_keyisvalid(ah, i)) ath_hal_keysetmac(ah, i, ni->ni_bssid); } /* * Invoke the parent method to do net80211 work. */ error = avp->av_newstate(vap, nstate, arg); if (error != 0) goto bad; /* * See above: ensure av_newstate() doesn't drop the lock * on us. */ IEEE80211_LOCK_ASSERT(ic); if (nstate == IEEE80211_S_RUN) { /* NB: collect bss node again, it may have changed */ ieee80211_free_node(ni); ni = ieee80211_ref_node(vap->iv_bss); DPRINTF(sc, ATH_DEBUG_STATE, "%s(RUN): iv_flags 0x%08x bintvl %d bssid %s " "capinfo 0x%04x chan %d\n", __func__, vap->iv_flags, ni->ni_intval, ether_sprintf(ni->ni_bssid), ni->ni_capinfo, ieee80211_chan2ieee(ic, ic->ic_curchan)); switch (vap->iv_opmode) { #ifdef IEEE80211_SUPPORT_TDMA case IEEE80211_M_AHDEMO: if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) break; /* fall thru... */ #endif case IEEE80211_M_HOSTAP: case IEEE80211_M_IBSS: case IEEE80211_M_MBSS: /* * Allocate and setup the beacon frame. * * Stop any previous beacon DMA. This may be * necessary, for example, when an ibss merge * causes reconfiguration; there will be a state * transition from RUN->RUN that means we may * be called with beacon transmission active. */ ath_hal_stoptxdma(ah, sc->sc_bhalq); error = ath_beacon_alloc(sc, ni); if (error != 0) goto bad; /* * If joining an adhoc network defer beacon timer * configuration to the next beacon frame so we * have a current TSF to use. Otherwise we're * starting an ibss/bss so there's no need to delay; * if this is the first vap moving to RUN state, then * beacon state needs to be [re]configured. */ if (vap->iv_opmode == IEEE80211_M_IBSS && ni->ni_tstamp.tsf != 0) { sc->sc_syncbeacon = 1; } else if (!sc->sc_beacons) { #ifdef IEEE80211_SUPPORT_TDMA if (vap->iv_caps & IEEE80211_C_TDMA) ath_tdma_config(sc, vap); else #endif ath_beacon_config(sc, vap); sc->sc_beacons = 1; } break; case IEEE80211_M_STA: /* * Defer beacon timer configuration to the next * beacon frame so we have a current TSF to use * (any TSF collected when scanning is likely old). * However if it's due to a CSA -> RUN transition, * force a beacon update so we pick up a lack of * beacons from an AP in CAC and thus force a * scan. */ sc->sc_syncbeacon = 1; if (csa_run_transition) ath_beacon_config(sc, vap); break; case IEEE80211_M_MONITOR: /* * Monitor mode vaps have only INIT->RUN and RUN->RUN * transitions so we must re-enable interrupts here to * handle the case of a single monitor mode vap. */ ath_hal_intrset(ah, sc->sc_imask); break; case IEEE80211_M_WDS: break; default: break; } /* * Let the hal process statistics collected during a * scan so it can provide calibrated noise floor data. */ ath_hal_process_noisefloor(ah); /* * Reset rssi stats; maybe not the best place... */ sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER; sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER; sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER; /* * Finally, start any timers and the task q thread * (in case we didn't go through SCAN state). */ if (ath_longcalinterval != 0) { /* start periodic recalibration timer */ callout_reset(&sc->sc_cal_ch, 1, ath_calibrate, sc); } else { DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: calibration disabled\n", __func__); } taskqueue_unblock(sc->sc_tq); } else if (nstate == IEEE80211_S_INIT) { /* * If there are no vaps left in RUN state then * shutdown host/driver operation: * o disable interrupts * o disable the task queue thread * o mark beacon processing as stopped */ if (!ath_isanyrunningvaps(vap)) { sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); /* disable interrupts */ ath_hal_intrset(ah, sc->sc_imask &~ HAL_INT_GLOBAL); taskqueue_block(sc->sc_tq); sc->sc_beacons = 0; } #ifdef IEEE80211_SUPPORT_TDMA ath_hal_setcca(ah, AH_TRUE); #endif } bad: ieee80211_free_node(ni); return error; } /* * Allocate a key cache slot to the station so we can * setup a mapping from key index to node. The key cache * slot is needed for managing antenna state and for * compression when stations do not use crypto. We do * it uniliaterally here; if crypto is employed this slot * will be reassigned. */ static void ath_setup_stationkey(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ath_softc *sc = vap->iv_ic->ic_ifp->if_softc; ieee80211_keyix keyix, rxkeyix; /* XXX should take a locked ref to vap->iv_bss */ if (!ath_key_alloc(vap, &ni->ni_ucastkey, &keyix, &rxkeyix)) { /* * Key cache is full; we'll fall back to doing * the more expensive lookup in software. Note * this also means no h/w compression. */ /* XXX msg+statistic */ } else { /* XXX locking? */ ni->ni_ucastkey.wk_keyix = keyix; ni->ni_ucastkey.wk_rxkeyix = rxkeyix; /* NB: must mark device key to get called back on delete */ ni->ni_ucastkey.wk_flags |= IEEE80211_KEY_DEVKEY; IEEE80211_ADDR_COPY(ni->ni_ucastkey.wk_macaddr, ni->ni_macaddr); /* NB: this will create a pass-thru key entry */ ath_keyset(sc, vap, &ni->ni_ucastkey, vap->iv_bss); } } /* * Setup driver-specific state for a newly associated node. * Note that we're called also on a re-associate, the isnew * param tells us if this is the first time or not. */ static void ath_newassoc(struct ieee80211_node *ni, int isnew) { struct ath_node *an = ATH_NODE(ni); struct ieee80211vap *vap = ni->ni_vap; struct ath_softc *sc = vap->iv_ic->ic_ifp->if_softc; const struct ieee80211_txparam *tp = ni->ni_txparms; an->an_mcastrix = ath_tx_findrix(sc, tp->mcastrate); an->an_mgmtrix = ath_tx_findrix(sc, tp->mgmtrate); ath_rate_newassoc(sc, an, isnew); if (isnew && (vap->iv_flags & IEEE80211_F_PRIVACY) == 0 && sc->sc_hasclrkey && ni->ni_ucastkey.wk_keyix == IEEE80211_KEYIX_NONE) ath_setup_stationkey(ni); } static int ath_setregdomain(struct ieee80211com *ic, struct ieee80211_regdomain *reg, int nchans, struct ieee80211_channel chans[]) { struct ath_softc *sc = ic->ic_ifp->if_softc; struct ath_hal *ah = sc->sc_ah; HAL_STATUS status; DPRINTF(sc, ATH_DEBUG_REGDOMAIN, "%s: rd %u cc %u location %c%s\n", __func__, reg->regdomain, reg->country, reg->location, reg->ecm ? " ecm" : ""); status = ath_hal_set_channels(ah, chans, nchans, reg->country, reg->regdomain); if (status != HAL_OK) { DPRINTF(sc, ATH_DEBUG_REGDOMAIN, "%s: failed, status %u\n", __func__, status); return EINVAL; /* XXX */ } return 0; } static void ath_getradiocaps(struct ieee80211com *ic, int maxchans, int *nchans, struct ieee80211_channel chans[]) { struct ath_softc *sc = ic->ic_ifp->if_softc; struct ath_hal *ah = sc->sc_ah; DPRINTF(sc, ATH_DEBUG_REGDOMAIN, "%s: use rd %u cc %d\n", __func__, SKU_DEBUG, CTRY_DEFAULT); /* XXX check return */ (void) ath_hal_getchannels(ah, chans, maxchans, nchans, HAL_MODE_ALL, CTRY_DEFAULT, SKU_DEBUG, AH_TRUE); } static int ath_getchannels(struct ath_softc *sc) { struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; struct ath_hal *ah = sc->sc_ah; HAL_STATUS status; /* * Collect channel set based on EEPROM contents. */ status = ath_hal_init_channels(ah, ic->ic_channels, IEEE80211_CHAN_MAX, &ic->ic_nchans, HAL_MODE_ALL, CTRY_DEFAULT, SKU_NONE, AH_TRUE); if (status != HAL_OK) { if_printf(ifp, "%s: unable to collect channel list from hal, " "status %d\n", __func__, status); return EINVAL; } (void) ath_hal_getregdomain(ah, &sc->sc_eerd); ath_hal_getcountrycode(ah, &sc->sc_eecc); /* NB: cannot fail */ /* XXX map Atheros sku's to net80211 SKU's */ /* XXX net80211 types too small */ ic->ic_regdomain.regdomain = (uint16_t) sc->sc_eerd; ic->ic_regdomain.country = (uint16_t) sc->sc_eecc; ic->ic_regdomain.isocc[0] = ' '; /* XXX don't know */ ic->ic_regdomain.isocc[1] = ' '; ic->ic_regdomain.ecm = 1; ic->ic_regdomain.location = 'I'; DPRINTF(sc, ATH_DEBUG_REGDOMAIN, "%s: eeprom rd %u cc %u (mapped rd %u cc %u) location %c%s\n", __func__, sc->sc_eerd, sc->sc_eecc, ic->ic_regdomain.regdomain, ic->ic_regdomain.country, ic->ic_regdomain.location, ic->ic_regdomain.ecm ? " ecm" : ""); return 0; } static int ath_rate_setup(struct ath_softc *sc, u_int mode) { struct ath_hal *ah = sc->sc_ah; const HAL_RATE_TABLE *rt; switch (mode) { case IEEE80211_MODE_11A: rt = ath_hal_getratetable(ah, HAL_MODE_11A); break; case IEEE80211_MODE_HALF: rt = ath_hal_getratetable(ah, HAL_MODE_11A_HALF_RATE); break; case IEEE80211_MODE_QUARTER: rt = ath_hal_getratetable(ah, HAL_MODE_11A_QUARTER_RATE); break; case IEEE80211_MODE_11B: rt = ath_hal_getratetable(ah, HAL_MODE_11B); break; case IEEE80211_MODE_11G: rt = ath_hal_getratetable(ah, HAL_MODE_11G); break; case IEEE80211_MODE_TURBO_A: rt = ath_hal_getratetable(ah, HAL_MODE_108A); break; case IEEE80211_MODE_TURBO_G: rt = ath_hal_getratetable(ah, HAL_MODE_108G); break; case IEEE80211_MODE_STURBO_A: rt = ath_hal_getratetable(ah, HAL_MODE_TURBO); break; case IEEE80211_MODE_11NA: rt = ath_hal_getratetable(ah, HAL_MODE_11NA_HT20); break; case IEEE80211_MODE_11NG: rt = ath_hal_getratetable(ah, HAL_MODE_11NG_HT20); break; default: DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid mode %u\n", __func__, mode); return 0; } sc->sc_rates[mode] = rt; return (rt != NULL); } static void ath_setcurmode(struct ath_softc *sc, enum ieee80211_phymode mode) { #define N(a) (sizeof(a)/sizeof(a[0])) /* NB: on/off times from the Atheros NDIS driver, w/ permission */ static const struct { u_int rate; /* tx/rx 802.11 rate */ u_int16_t timeOn; /* LED on time (ms) */ u_int16_t timeOff; /* LED off time (ms) */ } blinkrates[] = { { 108, 40, 10 }, { 96, 44, 11 }, { 72, 50, 13 }, { 48, 57, 14 }, { 36, 67, 16 }, { 24, 80, 20 }, { 22, 100, 25 }, { 18, 133, 34 }, { 12, 160, 40 }, { 10, 200, 50 }, { 6, 240, 58 }, { 4, 267, 66 }, { 2, 400, 100 }, { 0, 500, 130 }, /* XXX half/quarter rates */ }; const HAL_RATE_TABLE *rt; int i, j; memset(sc->sc_rixmap, 0xff, sizeof(sc->sc_rixmap)); rt = sc->sc_rates[mode]; KASSERT(rt != NULL, ("no h/w rate set for phy mode %u", mode)); for (i = 0; i < rt->rateCount; i++) { uint8_t ieeerate = rt->info[i].dot11Rate & IEEE80211_RATE_VAL; if (rt->info[i].phy != IEEE80211_T_HT) sc->sc_rixmap[ieeerate] = i; else sc->sc_rixmap[ieeerate | IEEE80211_RATE_MCS] = i; } memset(sc->sc_hwmap, 0, sizeof(sc->sc_hwmap)); for (i = 0; i < N(sc->sc_hwmap); i++) { if (i >= rt->rateCount) { sc->sc_hwmap[i].ledon = (500 * hz) / 1000; sc->sc_hwmap[i].ledoff = (130 * hz) / 1000; continue; } sc->sc_hwmap[i].ieeerate = rt->info[i].dot11Rate & IEEE80211_RATE_VAL; if (rt->info[i].phy == IEEE80211_T_HT) sc->sc_hwmap[i].ieeerate |= IEEE80211_RATE_MCS; sc->sc_hwmap[i].txflags = IEEE80211_RADIOTAP_F_DATAPAD; if (rt->info[i].shortPreamble || rt->info[i].phy == IEEE80211_T_OFDM) sc->sc_hwmap[i].txflags |= IEEE80211_RADIOTAP_F_SHORTPRE; sc->sc_hwmap[i].rxflags = sc->sc_hwmap[i].txflags; for (j = 0; j < N(blinkrates)-1; j++) if (blinkrates[j].rate == sc->sc_hwmap[i].ieeerate) break; /* NB: this uses the last entry if the rate isn't found */ /* XXX beware of overlow */ sc->sc_hwmap[i].ledon = (blinkrates[j].timeOn * hz) / 1000; sc->sc_hwmap[i].ledoff = (blinkrates[j].timeOff * hz) / 1000; } sc->sc_currates = rt; sc->sc_curmode = mode; /* * All protection frames are transmited at 2Mb/s for * 11g, otherwise at 1Mb/s. */ if (mode == IEEE80211_MODE_11G) sc->sc_protrix = ath_tx_findrix(sc, 2*2); else sc->sc_protrix = ath_tx_findrix(sc, 2*1); /* NB: caller is responsible for resetting rate control state */ #undef N } static void ath_watchdog(void *arg) { struct ath_softc *sc = arg; int do_reset = 0; if (sc->sc_wd_timer != 0 && --sc->sc_wd_timer == 0) { struct ifnet *ifp = sc->sc_ifp; uint32_t hangs; if (ath_hal_gethangstate(sc->sc_ah, 0xffff, &hangs) && hangs != 0) { if_printf(ifp, "%s hang detected (0x%x)\n", hangs & 0xff ? "bb" : "mac", hangs); } else if_printf(ifp, "device timeout\n"); do_reset = 1; ifp->if_oerrors++; sc->sc_stats.ast_watchdog++; } /* * We can't hold the lock across the ath_reset() call. * * And since this routine can't hold a lock and sleep, * do the reset deferred. */ if (do_reset) { taskqueue_enqueue(sc->sc_tq, &sc->sc_resettask); } callout_schedule(&sc->sc_wd_ch, hz); } #ifdef ATH_DIAGAPI /* * Diagnostic interface to the HAL. This is used by various * tools to do things like retrieve register contents for * debugging. The mechanism is intentionally opaque so that * it can change frequently w/o concern for compatiblity. */ static int ath_ioctl_diag(struct ath_softc *sc, struct ath_diag *ad) { struct ath_hal *ah = sc->sc_ah; u_int id = ad->ad_id & ATH_DIAG_ID; void *indata = NULL; void *outdata = NULL; u_int32_t insize = ad->ad_in_size; u_int32_t outsize = ad->ad_out_size; int error = 0; if (ad->ad_id & ATH_DIAG_IN) { /* * Copy in data. */ indata = malloc(insize, M_TEMP, M_NOWAIT); if (indata == NULL) { error = ENOMEM; goto bad; } error = copyin(ad->ad_in_data, indata, insize); if (error) goto bad; } if (ad->ad_id & ATH_DIAG_DYN) { /* * Allocate a buffer for the results (otherwise the HAL * returns a pointer to a buffer where we can read the * results). Note that we depend on the HAL leaving this * pointer for us to use below in reclaiming the buffer; * may want to be more defensive. */ outdata = malloc(outsize, M_TEMP, M_NOWAIT); if (outdata == NULL) { error = ENOMEM; goto bad; } } if (ath_hal_getdiagstate(ah, id, indata, insize, &outdata, &outsize)) { if (outsize < ad->ad_out_size) ad->ad_out_size = outsize; if (outdata != NULL) error = copyout(outdata, ad->ad_out_data, ad->ad_out_size); } else { error = EINVAL; } bad: if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) free(indata, M_TEMP); if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) free(outdata, M_TEMP); return error; } #endif /* ATH_DIAGAPI */ static int ath_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { #define IS_RUNNING(ifp) \ ((ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING)) struct ath_softc *sc = ifp->if_softc; struct ieee80211com *ic = ifp->if_l2com; struct ifreq *ifr = (struct ifreq *)data; const HAL_RATE_TABLE *rt; int error = 0; switch (cmd) { case SIOCSIFFLAGS: ATH_LOCK(sc); if (IS_RUNNING(ifp)) { /* * To avoid rescanning another access point, * do not call ath_init() here. Instead, * only reflect promisc mode settings. */ ath_mode_init(sc); } else if (ifp->if_flags & IFF_UP) { /* * Beware of being called during attach/detach * to reset promiscuous mode. In that case we * will still be marked UP but not RUNNING. * However trying to re-init the interface * is the wrong thing to do as we've already * torn down much of our state. There's * probably a better way to deal with this. */ if (!sc->sc_invalid) ath_init(sc); /* XXX lose error */ } else { ath_stop_locked(ifp); #ifdef notyet /* XXX must wakeup in places like ath_vap_delete */ if (!sc->sc_invalid) ath_hal_setpower(sc->sc_ah, HAL_PM_FULL_SLEEP); #endif } ATH_UNLOCK(sc); break; case SIOCGIFMEDIA: case SIOCSIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd); break; case SIOCGATHSTATS: /* NB: embed these numbers to get a consistent view */ sc->sc_stats.ast_tx_packets = ifp->if_opackets; sc->sc_stats.ast_rx_packets = ifp->if_ipackets; sc->sc_stats.ast_tx_rssi = ATH_RSSI(sc->sc_halstats.ns_avgtxrssi); sc->sc_stats.ast_rx_rssi = ATH_RSSI(sc->sc_halstats.ns_avgrssi); #ifdef IEEE80211_SUPPORT_TDMA sc->sc_stats.ast_tdma_tsfadjp = TDMA_AVG(sc->sc_avgtsfdeltap); sc->sc_stats.ast_tdma_tsfadjm = TDMA_AVG(sc->sc_avgtsfdeltam); #endif rt = sc->sc_currates; sc->sc_stats.ast_tx_rate = rt->info[sc->sc_txrix].dot11Rate &~ IEEE80211_RATE_BASIC; if (rt->info[sc->sc_txrix].phy & IEEE80211_T_HT) sc->sc_stats.ast_tx_rate |= IEEE80211_RATE_MCS; return copyout(&sc->sc_stats, ifr->ifr_data, sizeof (sc->sc_stats)); case SIOCZATHSTATS: error = priv_check(curthread, PRIV_DRIVER); if (error == 0) memset(&sc->sc_stats, 0, sizeof(sc->sc_stats)); break; #ifdef ATH_DIAGAPI case SIOCGATHDIAG: error = ath_ioctl_diag(sc, (struct ath_diag *) ifr); break; case SIOCGATHPHYERR: error = ath_ioctl_phyerr(sc,(struct ath_diag*) ifr); break; #endif case SIOCGIFADDR: error = ether_ioctl(ifp, cmd, data); break; default: error = EINVAL; break; } return error; #undef IS_RUNNING } /* * Announce various information on device/driver attach. */ static void ath_announce(struct ath_softc *sc) { struct ifnet *ifp = sc->sc_ifp; struct ath_hal *ah = sc->sc_ah; if_printf(ifp, "AR%s mac %d.%d RF%s phy %d.%d\n", ath_hal_mac_name(ah), ah->ah_macVersion, ah->ah_macRev, ath_hal_rf_name(ah), ah->ah_phyRev >> 4, ah->ah_phyRev & 0xf); if_printf(ifp, "2GHz radio: 0x%.4x; 5GHz radio: 0x%.4x\n", ah->ah_analog2GhzRev, ah->ah_analog5GhzRev); if (bootverbose) { int i; for (i = 0; i <= WME_AC_VO; i++) { struct ath_txq *txq = sc->sc_ac2q[i]; if_printf(ifp, "Use hw queue %u for %s traffic\n", txq->axq_qnum, ieee80211_wme_acnames[i]); } if_printf(ifp, "Use hw queue %u for CAB traffic\n", sc->sc_cabq->axq_qnum); if_printf(ifp, "Use hw queue %u for beacons\n", sc->sc_bhalq); } if (ath_rxbuf != ATH_RXBUF) if_printf(ifp, "using %u rx buffers\n", ath_rxbuf); if (ath_txbuf != ATH_TXBUF) if_printf(ifp, "using %u tx buffers\n", ath_txbuf); if (sc->sc_mcastkey && bootverbose) if_printf(ifp, "using multicast key search\n"); } #ifdef IEEE80211_SUPPORT_TDMA static void ath_tdma_settimers(struct ath_softc *sc, u_int32_t nexttbtt, u_int32_t bintval) { struct ath_hal *ah = sc->sc_ah; HAL_BEACON_TIMERS bt; bt.bt_intval = bintval | HAL_BEACON_ENA; bt.bt_nexttbtt = nexttbtt; bt.bt_nextdba = (nexttbtt<<3) - sc->sc_tdmadbaprep; bt.bt_nextswba = (nexttbtt<<3) - sc->sc_tdmaswbaprep; bt.bt_nextatim = nexttbtt+1; /* Enables TBTT, DBA, SWBA timers by default */ bt.bt_flags = 0; ath_hal_beaconsettimers(ah, &bt); } /* * Calculate the beacon interval. This is periodic in the * superframe for the bss. We assume each station is configured * identically wrt transmit rate so the guard time we calculate * above will be the same on all stations. Note we need to * factor in the xmit time because the hardware will schedule * a frame for transmit if the start of the frame is within * the burst time. When we get hardware that properly kills * frames in the PCU we can reduce/eliminate the guard time. * * Roundup to 1024 is so we have 1 TU buffer in the guard time * to deal with the granularity of the nexttbtt timer. 11n MAC's * with 1us timer granularity should allow us to reduce/eliminate * this. */ static void ath_tdma_bintvalsetup(struct ath_softc *sc, const struct ieee80211_tdma_state *tdma) { /* copy from vap state (XXX check all vaps have same value?) */ sc->sc_tdmaslotlen = tdma->tdma_slotlen; sc->sc_tdmabintval = roundup((sc->sc_tdmaslotlen+sc->sc_tdmaguard) * tdma->tdma_slotcnt, 1024); sc->sc_tdmabintval >>= 10; /* TSF -> TU */ if (sc->sc_tdmabintval & 1) sc->sc_tdmabintval++; if (tdma->tdma_slot == 0) { /* * Only slot 0 beacons; other slots respond. */ sc->sc_imask |= HAL_INT_SWBA; sc->sc_tdmaswba = 0; /* beacon immediately */ } else { /* XXX all vaps must be slot 0 or slot !0 */ sc->sc_imask &= ~HAL_INT_SWBA; } } /* * Max 802.11 overhead. This assumes no 4-address frames and * the encapsulation done by ieee80211_encap (llc). We also * include potential crypto overhead. */ #define IEEE80211_MAXOVERHEAD \ (sizeof(struct ieee80211_qosframe) \ + sizeof(struct llc) \ + IEEE80211_ADDR_LEN \ + IEEE80211_WEP_IVLEN \ + IEEE80211_WEP_KIDLEN \ + IEEE80211_WEP_CRCLEN \ + IEEE80211_WEP_MICLEN \ + IEEE80211_CRC_LEN) /* * Setup initially for tdma operation. Start the beacon * timers and enable SWBA if we are slot 0. Otherwise * we wait for slot 0 to arrive so we can sync up before * starting to transmit. */ static void ath_tdma_config(struct ath_softc *sc, struct ieee80211vap *vap) { struct ath_hal *ah = sc->sc_ah; struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; const struct ieee80211_txparam *tp; const struct ieee80211_tdma_state *tdma = NULL; int rix; if (vap == NULL) { vap = TAILQ_FIRST(&ic->ic_vaps); /* XXX */ if (vap == NULL) { if_printf(ifp, "%s: no vaps?\n", __func__); return; } } /* XXX should take a locked ref to iv_bss */ tp = vap->iv_bss->ni_txparms; /* * Calculate the guard time for each slot. This is the * time to send a maximal-size frame according to the * fixed/lowest transmit rate. Note that the interface * mtu does not include the 802.11 overhead so we must * tack that on (ath_hal_computetxtime includes the * preamble and plcp in it's calculation). */ tdma = vap->iv_tdma; if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) rix = ath_tx_findrix(sc, tp->ucastrate); else rix = ath_tx_findrix(sc, tp->mcastrate); /* XXX short preamble assumed */ sc->sc_tdmaguard = ath_hal_computetxtime(ah, sc->sc_currates, ifp->if_mtu + IEEE80211_MAXOVERHEAD, rix, AH_TRUE); ath_hal_intrset(ah, 0); ath_beaconq_config(sc); /* setup h/w beacon q */ if (sc->sc_setcca) ath_hal_setcca(ah, AH_FALSE); /* disable CCA */ ath_tdma_bintvalsetup(sc, tdma); /* calculate beacon interval */ ath_tdma_settimers(sc, sc->sc_tdmabintval, sc->sc_tdmabintval | HAL_BEACON_RESET_TSF); sc->sc_syncbeacon = 0; sc->sc_avgtsfdeltap = TDMA_DUMMY_MARKER; sc->sc_avgtsfdeltam = TDMA_DUMMY_MARKER; ath_hal_intrset(ah, sc->sc_imask); DPRINTF(sc, ATH_DEBUG_TDMA, "%s: slot %u len %uus cnt %u " "bsched %u guard %uus bintval %u TU dba prep %u\n", __func__, tdma->tdma_slot, tdma->tdma_slotlen, tdma->tdma_slotcnt, tdma->tdma_bintval, sc->sc_tdmaguard, sc->sc_tdmabintval, sc->sc_tdmadbaprep); } /* * Update tdma operation. Called from the 802.11 layer * when a beacon is received from the TDMA station operating * in the slot immediately preceding us in the bss. Use * the rx timestamp for the beacon frame to update our * beacon timers so we follow their schedule. Note that * by using the rx timestamp we implicitly include the * propagation delay in our schedule. */ static void ath_tdma_update(struct ieee80211_node *ni, const struct ieee80211_tdma_param *tdma, int changed) { #define TSF_TO_TU(_h,_l) \ ((((u_int32_t)(_h)) << 22) | (((u_int32_t)(_l)) >> 10)) #define TU_TO_TSF(_tu) (((u_int64_t)(_tu)) << 10) struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ath_softc *sc = ic->ic_ifp->if_softc; struct ath_hal *ah = sc->sc_ah; const HAL_RATE_TABLE *rt = sc->sc_currates; u_int64_t tsf, rstamp, nextslot, nexttbtt; u_int32_t txtime, nextslottu; int32_t tudelta, tsfdelta; const struct ath_rx_status *rs; int rix; sc->sc_stats.ast_tdma_update++; /* * Check for and adopt configuration changes. */ if (changed != 0) { const struct ieee80211_tdma_state *ts = vap->iv_tdma; ath_tdma_bintvalsetup(sc, ts); if (changed & TDMA_UPDATE_SLOTLEN) ath_wme_update(ic); DPRINTF(sc, ATH_DEBUG_TDMA, "%s: adopt slot %u slotcnt %u slotlen %u us " "bintval %u TU\n", __func__, ts->tdma_slot, ts->tdma_slotcnt, ts->tdma_slotlen, sc->sc_tdmabintval); /* XXX right? */ ath_hal_intrset(ah, sc->sc_imask); /* NB: beacon timers programmed below */ } /* extend rx timestamp to 64 bits */ rs = sc->sc_lastrs; tsf = ath_hal_gettsf64(ah); rstamp = ath_extend_tsf(sc, rs->rs_tstamp, tsf); /* * The rx timestamp is set by the hardware on completing * reception (at the point where the rx descriptor is DMA'd * to the host). To find the start of our next slot we * must adjust this time by the time required to send * the packet just received. */ rix = rt->rateCodeToIndex[rs->rs_rate]; txtime = ath_hal_computetxtime(ah, rt, rs->rs_datalen, rix, rt->info[rix].shortPreamble); /* NB: << 9 is to cvt to TU and /2 */ nextslot = (rstamp - txtime) + (sc->sc_tdmabintval << 9); nextslottu = TSF_TO_TU(nextslot>>32, nextslot) & HAL_BEACON_PERIOD; /* * Retrieve the hardware NextTBTT in usecs * and calculate the difference between what the * other station thinks and what we have programmed. This * lets us figure how to adjust our timers to match. The * adjustments are done by pulling the TSF forward and possibly * rewriting the beacon timers. */ nexttbtt = ath_hal_getnexttbtt(ah); tsfdelta = (int32_t)((nextslot % TU_TO_TSF(HAL_BEACON_PERIOD + 1)) - nexttbtt); DPRINTF(sc, ATH_DEBUG_TDMA_TIMER, "tsfdelta %d avg +%d/-%d\n", tsfdelta, TDMA_AVG(sc->sc_avgtsfdeltap), TDMA_AVG(sc->sc_avgtsfdeltam)); if (tsfdelta < 0) { TDMA_SAMPLE(sc->sc_avgtsfdeltap, 0); TDMA_SAMPLE(sc->sc_avgtsfdeltam, -tsfdelta); tsfdelta = -tsfdelta % 1024; nextslottu++; } else if (tsfdelta > 0) { TDMA_SAMPLE(sc->sc_avgtsfdeltap, tsfdelta); TDMA_SAMPLE(sc->sc_avgtsfdeltam, 0); tsfdelta = 1024 - (tsfdelta % 1024); nextslottu++; } else { TDMA_SAMPLE(sc->sc_avgtsfdeltap, 0); TDMA_SAMPLE(sc->sc_avgtsfdeltam, 0); } tudelta = nextslottu - TSF_TO_TU(nexttbtt >> 32, nexttbtt); /* * Copy sender's timetstamp into tdma ie so they can * calculate roundtrip time. We submit a beacon frame * below after any timer adjustment. The frame goes out * at the next TBTT so the sender can calculate the * roundtrip by inspecting the tdma ie in our beacon frame. * * NB: This tstamp is subtlely preserved when * IEEE80211_BEACON_TDMA is marked (e.g. when the * slot position changes) because ieee80211_add_tdma * skips over the data. */ memcpy(ATH_VAP(vap)->av_boff.bo_tdma + __offsetof(struct ieee80211_tdma_param, tdma_tstamp), &ni->ni_tstamp.data, 8); #if 0 DPRINTF(sc, ATH_DEBUG_TDMA_TIMER, "tsf %llu nextslot %llu (%d, %d) nextslottu %u nexttbtt %llu (%d)\n", (unsigned long long) tsf, (unsigned long long) nextslot, (int)(nextslot - tsf), tsfdelta, nextslottu, nexttbtt, tudelta); #endif /* * Adjust the beacon timers only when pulling them forward * or when going back by less than the beacon interval. * Negative jumps larger than the beacon interval seem to * cause the timers to stop and generally cause instability. * This basically filters out jumps due to missed beacons. */ if (tudelta != 0 && (tudelta > 0 || -tudelta < sc->sc_tdmabintval)) { ath_tdma_settimers(sc, nextslottu, sc->sc_tdmabintval); sc->sc_stats.ast_tdma_timers++; } if (tsfdelta > 0) { ath_hal_adjusttsf(ah, tsfdelta); sc->sc_stats.ast_tdma_tsf++; } ath_tdma_beacon_send(sc, vap); /* prepare response */ #undef TU_TO_TSF #undef TSF_TO_TU } /* * Transmit a beacon frame at SWBA. Dynamic updates * to the frame contents are done as needed. */ static void ath_tdma_beacon_send(struct ath_softc *sc, struct ieee80211vap *vap) { struct ath_hal *ah = sc->sc_ah; struct ath_buf *bf; int otherant; /* * Check if the previous beacon has gone out. If * not don't try to post another, skip this period * and wait for the next. Missed beacons indicate * a problem and should not occur. If we miss too * many consecutive beacons reset the device. */ if (ath_hal_numtxpending(ah, sc->sc_bhalq) != 0) { sc->sc_bmisscount++; DPRINTF(sc, ATH_DEBUG_BEACON, "%s: missed %u consecutive beacons\n", __func__, sc->sc_bmisscount); if (sc->sc_bmisscount >= ath_bstuck_threshold) taskqueue_enqueue(sc->sc_tq, &sc->sc_bstucktask); return; } if (sc->sc_bmisscount != 0) { DPRINTF(sc, ATH_DEBUG_BEACON, "%s: resume beacon xmit after %u misses\n", __func__, sc->sc_bmisscount); sc->sc_bmisscount = 0; } /* * Check recent per-antenna transmit statistics and flip * the default antenna if noticeably more frames went out * on the non-default antenna. * XXX assumes 2 anntenae */ if (!sc->sc_diversity) { otherant = sc->sc_defant & 1 ? 2 : 1; if (sc->sc_ant_tx[otherant] > sc->sc_ant_tx[sc->sc_defant] + 2) ath_setdefantenna(sc, otherant); sc->sc_ant_tx[1] = sc->sc_ant_tx[2] = 0; } bf = ath_beacon_generate(sc, vap); if (bf != NULL) { /* * Stop any current dma and put the new frame on the queue. * This should never fail since we check above that no frames * are still pending on the queue. */ if (!ath_hal_stoptxdma(ah, sc->sc_bhalq)) { DPRINTF(sc, ATH_DEBUG_ANY, "%s: beacon queue %u did not stop?\n", __func__, sc->sc_bhalq); /* NB: the HAL still stops DMA, so proceed */ } ath_hal_puttxbuf(ah, sc->sc_bhalq, bf->bf_daddr); ath_hal_txstart(ah, sc->sc_bhalq); sc->sc_stats.ast_be_xmit++; /* XXX per-vap? */ /* * Record local TSF for our last send for use * in arbitrating slot collisions. */ /* XXX should take a locked ref to iv_bss */ vap->iv_bss->ni_tstamp.tsf = ath_hal_gettsf64(ah); } } #endif /* IEEE80211_SUPPORT_TDMA */ static void ath_dfs_tasklet(void *p, int npending) { struct ath_softc *sc = (struct ath_softc *) p; struct ifnet *ifp = sc->sc_ifp; struct ieee80211com *ic = ifp->if_l2com; /* * If previous processing has found a radar event, * signal this to the net80211 layer to begin DFS * processing. */ if (ath_dfs_process_radar_event(sc, sc->sc_curchan)) { /* DFS event found, initiate channel change */ /* * XXX doesn't currently tell us whether the event * XXX was found in the primary or extension * XXX channel! */ IEEE80211_LOCK(ic); ieee80211_dfs_notify_radar(ic, sc->sc_curchan); IEEE80211_UNLOCK(ic); } } MODULE_VERSION(if_ath, 1); MODULE_DEPEND(if_ath, wlan, 1, 1, 1); /* 802.11 media layer */ #if defined(IEEE80211_ALQ) || defined(AH_DEBUG_ALQ) MODULE_DEPEND(if_ath, alq, 1, 1, 1); #endif