2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 * redistribution must be conditioned upon including a substantially
14 * similar Disclaimer requirement for further binary redistribution.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGES.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
34 * Driver for the Atheros Wireless LAN controller.
36 * This software is derived from work of Atsushi Onoe; his contribution
37 * is greatly appreciated.
43 * This is needed for register operations which are performed
44 * by the driver - eg, calls to ath_hal_gettsf32().
46 * It's also required for any AH_DEBUG checks in here, eg the
47 * module dependencies.
52 #include <sys/param.h>
53 #include <sys/systm.h>
54 #include <sys/sysctl.h>
56 #include <sys/malloc.h>
58 #include <sys/mutex.h>
59 #include <sys/kernel.h>
60 #include <sys/socket.h>
61 #include <sys/sockio.h>
62 #include <sys/errno.h>
63 #include <sys/callout.h>
65 #include <sys/endian.h>
66 #include <sys/kthread.h>
67 #include <sys/taskqueue.h>
69 #include <sys/module.h>
71 #include <sys/smp.h> /* for mp_ncpus */
73 #include <machine/bus.h>
76 #include <net/if_dl.h>
77 #include <net/if_media.h>
78 #include <net/if_types.h>
79 #include <net/if_arp.h>
80 #include <net/ethernet.h>
81 #include <net/if_llc.h>
83 #include <net80211/ieee80211_var.h>
84 #include <net80211/ieee80211_regdomain.h>
85 #ifdef IEEE80211_SUPPORT_SUPERG
86 #include <net80211/ieee80211_superg.h>
88 #ifdef IEEE80211_SUPPORT_TDMA
89 #include <net80211/ieee80211_tdma.h>
95 #include <netinet/in.h>
96 #include <netinet/if_ether.h>
99 #include <dev/ath/if_athvar.h>
100 #include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */
101 #include <dev/ath/ath_hal/ah_diagcodes.h>
103 #include <dev/ath/if_ath_debug.h>
104 #include <dev/ath/if_ath_misc.h>
105 #include <dev/ath/if_ath_tsf.h>
106 #include <dev/ath/if_ath_tx.h>
107 #include <dev/ath/if_ath_sysctl.h>
108 #include <dev/ath/if_ath_led.h>
109 #include <dev/ath/if_ath_keycache.h>
110 #include <dev/ath/if_ath_rx.h>
111 #include <dev/ath/if_ath_rx_edma.h>
112 #include <dev/ath/if_ath_tx_edma.h>
113 #include <dev/ath/if_ath_beacon.h>
114 #include <dev/ath/if_ath_spectral.h>
115 #include <dev/ath/if_athdfs.h>
118 #include <dev/ath/ath_tx99/ath_tx99.h>
122 #include <dev/ath/if_ath_alq.h>
126 * Only enable this if you're working on PS-POLL support.
131 * ATH_BCBUF determines the number of vap's that can transmit
132 * beacons and also (currently) the number of vap's that can
133 * have unique mac addresses/bssid. When staggering beacons
134 * 4 is probably a good max as otherwise the beacons become
135 * very closely spaced and there is limited time for cab q traffic
136 * to go out. You can burst beacons instead but that is not good
137 * for stations in power save and at some point you really want
138 * another radio (and channel).
140 * The limit on the number of mac addresses is tied to our use of
141 * the U/L bit and tracking addresses in a byte; it would be
142 * worthwhile to allow more for applications like proxy sta.
144 CTASSERT(ATH_BCBUF <= 8);
146 static struct ieee80211vap *ath_vap_create(struct ieee80211com *,
147 const char [IFNAMSIZ], int, enum ieee80211_opmode, int,
148 const uint8_t [IEEE80211_ADDR_LEN],
149 const uint8_t [IEEE80211_ADDR_LEN]);
150 static void ath_vap_delete(struct ieee80211vap *);
151 static void ath_init(void *);
152 static void ath_stop_locked(struct ifnet *);
153 static void ath_stop(struct ifnet *);
154 static int ath_reset_vap(struct ieee80211vap *, u_long);
155 static void ath_start_queue(struct ifnet *ifp);
156 static int ath_media_change(struct ifnet *);
157 static void ath_watchdog(void *);
158 static int ath_ioctl(struct ifnet *, u_long, caddr_t);
159 static void ath_fatal_proc(void *, int);
160 static void ath_bmiss_vap(struct ieee80211vap *);
161 static void ath_bmiss_proc(void *, int);
162 static void ath_key_update_begin(struct ieee80211vap *);
163 static void ath_key_update_end(struct ieee80211vap *);
164 static void ath_update_mcast(struct ifnet *);
165 static void ath_update_promisc(struct ifnet *);
166 static void ath_updateslot(struct ifnet *);
167 static void ath_bstuck_proc(void *, int);
168 static void ath_reset_proc(void *, int);
169 static int ath_desc_alloc(struct ath_softc *);
170 static void ath_desc_free(struct ath_softc *);
171 static struct ieee80211_node *ath_node_alloc(struct ieee80211vap *,
172 const uint8_t [IEEE80211_ADDR_LEN]);
173 static void ath_node_cleanup(struct ieee80211_node *);
174 static void ath_node_free(struct ieee80211_node *);
175 static void ath_node_getsignal(const struct ieee80211_node *,
177 static void ath_txq_init(struct ath_softc *sc, struct ath_txq *, int);
178 static struct ath_txq *ath_txq_setup(struct ath_softc*, int qtype, int subtype);
179 static int ath_tx_setup(struct ath_softc *, int, int);
180 static void ath_tx_cleanupq(struct ath_softc *, struct ath_txq *);
181 static void ath_tx_cleanup(struct ath_softc *);
182 static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq,
184 static void ath_tx_proc_q0(void *, int);
185 static void ath_tx_proc_q0123(void *, int);
186 static void ath_tx_proc(void *, int);
187 static void ath_txq_sched_tasklet(void *, int);
188 static int ath_chan_set(struct ath_softc *, struct ieee80211_channel *);
189 static void ath_chan_change(struct ath_softc *, struct ieee80211_channel *);
190 static void ath_scan_start(struct ieee80211com *);
191 static void ath_scan_end(struct ieee80211com *);
192 static void ath_set_channel(struct ieee80211com *);
193 #ifdef ATH_ENABLE_11N
194 static void ath_update_chw(struct ieee80211com *);
195 #endif /* ATH_ENABLE_11N */
196 static void ath_calibrate(void *);
197 static int ath_newstate(struct ieee80211vap *, enum ieee80211_state, int);
198 static void ath_setup_stationkey(struct ieee80211_node *);
199 static void ath_newassoc(struct ieee80211_node *, int);
200 static int ath_setregdomain(struct ieee80211com *,
201 struct ieee80211_regdomain *, int,
202 struct ieee80211_channel []);
203 static void ath_getradiocaps(struct ieee80211com *, int, int *,
204 struct ieee80211_channel []);
205 static int ath_getchannels(struct ath_softc *);
207 static int ath_rate_setup(struct ath_softc *, u_int mode);
208 static void ath_setcurmode(struct ath_softc *, enum ieee80211_phymode);
210 static void ath_announce(struct ath_softc *);
212 static void ath_dfs_tasklet(void *, int);
213 static void ath_node_powersave(struct ieee80211_node *, int);
214 static int ath_node_set_tim(struct ieee80211_node *, int);
216 #ifdef IEEE80211_SUPPORT_TDMA
217 #include <dev/ath/if_ath_tdma.h>
220 SYSCTL_DECL(_hw_ath);
222 /* XXX validate sysctl values */
223 static int ath_longcalinterval = 30; /* long cals every 30 secs */
224 SYSCTL_INT(_hw_ath, OID_AUTO, longcal, CTLFLAG_RW, &ath_longcalinterval,
225 0, "long chip calibration interval (secs)");
226 static int ath_shortcalinterval = 100; /* short cals every 100 ms */
227 SYSCTL_INT(_hw_ath, OID_AUTO, shortcal, CTLFLAG_RW, &ath_shortcalinterval,
228 0, "short chip calibration interval (msecs)");
229 static int ath_resetcalinterval = 20*60; /* reset cal state 20 mins */
230 SYSCTL_INT(_hw_ath, OID_AUTO, resetcal, CTLFLAG_RW, &ath_resetcalinterval,
231 0, "reset chip calibration results (secs)");
232 static int ath_anicalinterval = 100; /* ANI calibration - 100 msec */
233 SYSCTL_INT(_hw_ath, OID_AUTO, anical, CTLFLAG_RW, &ath_anicalinterval,
234 0, "ANI calibration (msecs)");
236 int ath_rxbuf = ATH_RXBUF; /* # rx buffers to allocate */
237 SYSCTL_INT(_hw_ath, OID_AUTO, rxbuf, CTLFLAG_RW, &ath_rxbuf,
238 0, "rx buffers allocated");
239 TUNABLE_INT("hw.ath.rxbuf", &ath_rxbuf);
240 int ath_txbuf = ATH_TXBUF; /* # tx buffers to allocate */
241 SYSCTL_INT(_hw_ath, OID_AUTO, txbuf, CTLFLAG_RW, &ath_txbuf,
242 0, "tx buffers allocated");
243 TUNABLE_INT("hw.ath.txbuf", &ath_txbuf);
244 int ath_txbuf_mgmt = ATH_MGMT_TXBUF; /* # mgmt tx buffers to allocate */
245 SYSCTL_INT(_hw_ath, OID_AUTO, txbuf_mgmt, CTLFLAG_RW, &ath_txbuf_mgmt,
246 0, "tx (mgmt) buffers allocated");
247 TUNABLE_INT("hw.ath.txbuf_mgmt", &ath_txbuf_mgmt);
249 int ath_bstuck_threshold = 4; /* max missed beacons */
250 SYSCTL_INT(_hw_ath, OID_AUTO, bstuck, CTLFLAG_RW, &ath_bstuck_threshold,
251 0, "max missed beacon xmits before chip reset");
253 MALLOC_DEFINE(M_ATHDEV, "athdev", "ath driver dma buffers");
256 ath_legacy_attach_comp_func(struct ath_softc *sc)
260 * Special case certain configurations. Note the
261 * CAB queue is handled by these specially so don't
262 * include them when checking the txq setup mask.
264 switch (sc->sc_txqsetup &~ (1<<sc->sc_cabq->axq_qnum)) {
266 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0, sc);
269 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0123, sc);
272 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc, sc);
277 #define HAL_MODE_HT20 (HAL_MODE_11NG_HT20 | HAL_MODE_11NA_HT20)
278 #define HAL_MODE_HT40 \
279 (HAL_MODE_11NG_HT40PLUS | HAL_MODE_11NG_HT40MINUS | \
280 HAL_MODE_11NA_HT40PLUS | HAL_MODE_11NA_HT40MINUS)
282 ath_attach(u_int16_t devid, struct ath_softc *sc)
285 struct ieee80211com *ic;
286 struct ath_hal *ah = NULL;
290 uint8_t macaddr[IEEE80211_ADDR_LEN];
291 int rx_chainmask, tx_chainmask;
293 DPRINTF(sc, ATH_DEBUG_ANY, "%s: devid 0x%x\n", __func__, devid);
296 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
298 device_printf(sc->sc_dev, "can not if_alloc()\n");
305 /* set these up early for if_printf use */
306 if_initname(ifp, device_get_name(sc->sc_dev),
307 device_get_unit(sc->sc_dev));
310 ah = ath_hal_attach(devid, sc, sc->sc_st, sc->sc_sh,
311 sc->sc_eepromdata, &status);
313 if_printf(ifp, "unable to attach hardware; HAL status %u\n",
319 sc->sc_invalid = 0; /* ready to go, enable interrupt handling */
321 sc->sc_debug = ath_debug;
325 * Setup the DMA/EDMA functions based on the current
328 * This is required before the descriptors are allocated.
330 if (ath_hal_hasedma(sc->sc_ah)) {
332 ath_recv_setup_edma(sc);
333 ath_xmit_setup_edma(sc);
335 ath_recv_setup_legacy(sc);
336 ath_xmit_setup_legacy(sc);
340 * Check if the MAC has multi-rate retry support.
341 * We do this by trying to setup a fake extended
342 * descriptor. MAC's that don't have support will
343 * return false w/o doing anything. MAC's that do
344 * support it will return true w/o doing anything.
346 sc->sc_mrretry = ath_hal_setupxtxdesc(ah, NULL, 0,0, 0,0, 0,0);
349 * Check if the device has hardware counters for PHY
350 * errors. If so we need to enable the MIB interrupt
351 * so we can act on stat triggers.
353 if (ath_hal_hwphycounters(ah))
357 * Get the hardware key cache size.
359 sc->sc_keymax = ath_hal_keycachesize(ah);
360 if (sc->sc_keymax > ATH_KEYMAX) {
361 if_printf(ifp, "Warning, using only %u of %u key cache slots\n",
362 ATH_KEYMAX, sc->sc_keymax);
363 sc->sc_keymax = ATH_KEYMAX;
366 * Reset the key cache since some parts do not
367 * reset the contents on initial power up.
369 for (i = 0; i < sc->sc_keymax; i++)
370 ath_hal_keyreset(ah, i);
373 * Collect the default channel list.
375 error = ath_getchannels(sc);
380 * Setup rate tables for all potential media types.
382 ath_rate_setup(sc, IEEE80211_MODE_11A);
383 ath_rate_setup(sc, IEEE80211_MODE_11B);
384 ath_rate_setup(sc, IEEE80211_MODE_11G);
385 ath_rate_setup(sc, IEEE80211_MODE_TURBO_A);
386 ath_rate_setup(sc, IEEE80211_MODE_TURBO_G);
387 ath_rate_setup(sc, IEEE80211_MODE_STURBO_A);
388 ath_rate_setup(sc, IEEE80211_MODE_11NA);
389 ath_rate_setup(sc, IEEE80211_MODE_11NG);
390 ath_rate_setup(sc, IEEE80211_MODE_HALF);
391 ath_rate_setup(sc, IEEE80211_MODE_QUARTER);
393 /* NB: setup here so ath_rate_update is happy */
394 ath_setcurmode(sc, IEEE80211_MODE_11A);
397 * Allocate TX descriptors and populate the lists.
399 error = ath_desc_alloc(sc);
401 if_printf(ifp, "failed to allocate TX descriptors: %d\n",
405 error = ath_txdma_setup(sc);
407 if_printf(ifp, "failed to allocate TX descriptors: %d\n",
413 * Allocate RX descriptors and populate the lists.
415 error = ath_rxdma_setup(sc);
417 if_printf(ifp, "failed to allocate RX descriptors: %d\n",
422 callout_init_mtx(&sc->sc_cal_ch, &sc->sc_mtx, 0);
423 callout_init_mtx(&sc->sc_wd_ch, &sc->sc_mtx, 0);
425 ATH_TXBUF_LOCK_INIT(sc);
427 sc->sc_tq = taskqueue_create("ath_taskq", M_NOWAIT,
428 taskqueue_thread_enqueue, &sc->sc_tq);
429 taskqueue_start_threads(&sc->sc_tq, 1, PI_NET,
430 "%s taskq", ifp->if_xname);
432 TASK_INIT(&sc->sc_rxtask, 0, sc->sc_rx.recv_tasklet, sc);
433 TASK_INIT(&sc->sc_bmisstask, 0, ath_bmiss_proc, sc);
434 TASK_INIT(&sc->sc_bstucktask,0, ath_bstuck_proc, sc);
435 TASK_INIT(&sc->sc_resettask,0, ath_reset_proc, sc);
436 TASK_INIT(&sc->sc_txqtask, 0, ath_txq_sched_tasklet, sc);
437 TASK_INIT(&sc->sc_fataltask, 0, ath_fatal_proc, sc);
439 /* XXX make this a higher priority taskqueue? */
440 TASK_INIT(&sc->sc_txpkttask, 0, ath_start_task, sc);
443 * Allocate hardware transmit queues: one queue for
444 * beacon frames and one data queue for each QoS
445 * priority. Note that the hal handles resetting
446 * these queues at the needed time.
450 sc->sc_bhalq = ath_beaconq_setup(sc);
451 if (sc->sc_bhalq == (u_int) -1) {
452 if_printf(ifp, "unable to setup a beacon xmit queue!\n");
456 sc->sc_cabq = ath_txq_setup(sc, HAL_TX_QUEUE_CAB, 0);
457 if (sc->sc_cabq == NULL) {
458 if_printf(ifp, "unable to setup CAB xmit queue!\n");
462 /* NB: insure BK queue is the lowest priority h/w queue */
463 if (!ath_tx_setup(sc, WME_AC_BK, HAL_WME_AC_BK)) {
464 if_printf(ifp, "unable to setup xmit queue for %s traffic!\n",
465 ieee80211_wme_acnames[WME_AC_BK]);
469 if (!ath_tx_setup(sc, WME_AC_BE, HAL_WME_AC_BE) ||
470 !ath_tx_setup(sc, WME_AC_VI, HAL_WME_AC_VI) ||
471 !ath_tx_setup(sc, WME_AC_VO, HAL_WME_AC_VO)) {
473 * Not enough hardware tx queues to properly do WME;
474 * just punt and assign them all to the same h/w queue.
475 * We could do a better job of this if, for example,
476 * we allocate queues when we switch from station to
479 if (sc->sc_ac2q[WME_AC_VI] != NULL)
480 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_VI]);
481 if (sc->sc_ac2q[WME_AC_BE] != NULL)
482 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_BE]);
483 sc->sc_ac2q[WME_AC_BE] = sc->sc_ac2q[WME_AC_BK];
484 sc->sc_ac2q[WME_AC_VI] = sc->sc_ac2q[WME_AC_BK];
485 sc->sc_ac2q[WME_AC_VO] = sc->sc_ac2q[WME_AC_BK];
489 * Attach the TX completion function.
491 * The non-EDMA chips may have some special case optimisations;
492 * this method gives everyone a chance to attach cleanly.
494 sc->sc_tx.xmit_attach_comp_func(sc);
497 * Setup rate control. Some rate control modules
498 * call back to change the anntena state so expose
499 * the necessary entry points.
500 * XXX maybe belongs in struct ath_ratectrl?
502 sc->sc_setdefantenna = ath_setdefantenna;
503 sc->sc_rc = ath_rate_attach(sc);
504 if (sc->sc_rc == NULL) {
509 /* Attach DFS module */
510 if (! ath_dfs_attach(sc)) {
511 device_printf(sc->sc_dev,
512 "%s: unable to attach DFS\n", __func__);
517 /* Attach spectral module */
518 if (ath_spectral_attach(sc) < 0) {
519 device_printf(sc->sc_dev,
520 "%s: unable to attach spectral\n", __func__);
525 /* Start DFS processing tasklet */
526 TASK_INIT(&sc->sc_dfstask, 0, ath_dfs_tasklet, sc);
528 /* Configure LED state */
531 sc->sc_ledon = 0; /* low true */
532 sc->sc_ledidle = (2700*hz)/1000; /* 2.7sec */
533 callout_init(&sc->sc_ledtimer, CALLOUT_MPSAFE);
536 * Don't setup hardware-based blinking.
538 * Although some NICs may have this configured in the
539 * default reset register values, the user may wish
540 * to alter which pins have which function.
542 * The reference driver attaches the MAC network LED to GPIO1 and
543 * the MAC power LED to GPIO2. However, the DWA-552 cardbus
544 * NIC has these reversed.
546 sc->sc_hardled = (1 == 0);
547 sc->sc_led_net_pin = -1;
548 sc->sc_led_pwr_pin = -1;
550 * Auto-enable soft led processing for IBM cards and for
551 * 5211 minipci cards. Users can also manually enable/disable
552 * support with a sysctl.
554 sc->sc_softled = (devid == AR5212_DEVID_IBM || devid == AR5211_DEVID);
556 ath_hal_setledstate(ah, HAL_LED_INIT);
559 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
560 ifp->if_start = ath_start_queue;
561 ifp->if_ioctl = ath_ioctl;
562 ifp->if_init = ath_init;
563 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
564 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
565 IFQ_SET_READY(&ifp->if_snd);
568 /* XXX not right but it's not used anywhere important */
569 ic->ic_phytype = IEEE80211_T_OFDM;
570 ic->ic_opmode = IEEE80211_M_STA;
572 IEEE80211_C_STA /* station mode */
573 | IEEE80211_C_IBSS /* ibss, nee adhoc, mode */
574 | IEEE80211_C_HOSTAP /* hostap mode */
575 | IEEE80211_C_MONITOR /* monitor mode */
576 | IEEE80211_C_AHDEMO /* adhoc demo mode */
577 | IEEE80211_C_WDS /* 4-address traffic works */
578 | IEEE80211_C_MBSS /* mesh point link mode */
579 | IEEE80211_C_SHPREAMBLE /* short preamble supported */
580 | IEEE80211_C_SHSLOT /* short slot time supported */
581 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */
582 #ifndef ATH_ENABLE_11N
583 | IEEE80211_C_BGSCAN /* capable of bg scanning */
585 | IEEE80211_C_TXFRAG /* handle tx frags */
586 #ifdef ATH_ENABLE_DFS
587 | IEEE80211_C_DFS /* Enable radar detection */
591 * Query the hal to figure out h/w crypto support.
593 if (ath_hal_ciphersupported(ah, HAL_CIPHER_WEP))
594 ic->ic_cryptocaps |= IEEE80211_CRYPTO_WEP;
595 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_OCB))
596 ic->ic_cryptocaps |= IEEE80211_CRYPTO_AES_OCB;
597 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_CCM))
598 ic->ic_cryptocaps |= IEEE80211_CRYPTO_AES_CCM;
599 if (ath_hal_ciphersupported(ah, HAL_CIPHER_CKIP))
600 ic->ic_cryptocaps |= IEEE80211_CRYPTO_CKIP;
601 if (ath_hal_ciphersupported(ah, HAL_CIPHER_TKIP)) {
602 ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIP;
604 * Check if h/w does the MIC and/or whether the
605 * separate key cache entries are required to
606 * handle both tx+rx MIC keys.
608 if (ath_hal_ciphersupported(ah, HAL_CIPHER_MIC))
609 ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIPMIC;
611 * If the h/w supports storing tx+rx MIC keys
612 * in one cache slot automatically enable use.
614 if (ath_hal_hastkipsplit(ah) ||
615 !ath_hal_settkipsplit(ah, AH_FALSE))
618 * If the h/w can do TKIP MIC together with WME then
619 * we use it; otherwise we force the MIC to be done
620 * in software by the net80211 layer.
622 if (ath_hal_haswmetkipmic(ah))
623 sc->sc_wmetkipmic = 1;
625 sc->sc_hasclrkey = ath_hal_ciphersupported(ah, HAL_CIPHER_CLR);
627 * Check for multicast key search support.
629 if (ath_hal_hasmcastkeysearch(sc->sc_ah) &&
630 !ath_hal_getmcastkeysearch(sc->sc_ah)) {
631 ath_hal_setmcastkeysearch(sc->sc_ah, 1);
633 sc->sc_mcastkey = ath_hal_getmcastkeysearch(ah);
635 * Mark key cache slots associated with global keys
636 * as in use. If we knew TKIP was not to be used we
637 * could leave the +32, +64, and +32+64 slots free.
639 for (i = 0; i < IEEE80211_WEP_NKID; i++) {
640 setbit(sc->sc_keymap, i);
641 setbit(sc->sc_keymap, i+64);
642 if (sc->sc_splitmic) {
643 setbit(sc->sc_keymap, i+32);
644 setbit(sc->sc_keymap, i+32+64);
648 * TPC support can be done either with a global cap or
649 * per-packet support. The latter is not available on
650 * all parts. We're a bit pedantic here as all parts
651 * support a global cap.
653 if (ath_hal_hastpc(ah) || ath_hal_hastxpowlimit(ah))
654 ic->ic_caps |= IEEE80211_C_TXPMGT;
657 * Mark WME capability only if we have sufficient
658 * hardware queues to do proper priority scheduling.
660 if (sc->sc_ac2q[WME_AC_BE] != sc->sc_ac2q[WME_AC_BK])
661 ic->ic_caps |= IEEE80211_C_WME;
663 * Check for misc other capabilities.
665 if (ath_hal_hasbursting(ah))
666 ic->ic_caps |= IEEE80211_C_BURST;
667 sc->sc_hasbmask = ath_hal_hasbssidmask(ah);
668 sc->sc_hasbmatch = ath_hal_hasbssidmatch(ah);
669 sc->sc_hastsfadd = ath_hal_hastsfadjust(ah);
670 sc->sc_rxslink = ath_hal_self_linked_final_rxdesc(ah);
671 sc->sc_rxtsf32 = ath_hal_has_long_rxdesc_tsf(ah);
672 if (ath_hal_hasfastframes(ah))
673 ic->ic_caps |= IEEE80211_C_FF;
674 wmodes = ath_hal_getwirelessmodes(ah);
675 if (wmodes & (HAL_MODE_108G|HAL_MODE_TURBO))
676 ic->ic_caps |= IEEE80211_C_TURBOP;
677 #ifdef IEEE80211_SUPPORT_TDMA
678 if (ath_hal_macversion(ah) > 0x78) {
679 ic->ic_caps |= IEEE80211_C_TDMA; /* capable of TDMA */
680 ic->ic_tdma_update = ath_tdma_update;
685 * TODO: enforce that at least this many frames are available
686 * in the txbuf list before allowing data frames (raw or
687 * otherwise) to be transmitted.
689 sc->sc_txq_data_minfree = 10;
691 * Leave this as default to maintain legacy behaviour.
692 * Shortening the cabq/mcastq may end up causing some
693 * undesirable behaviour.
695 sc->sc_txq_mcastq_maxdepth = ath_txbuf;
698 * Allow the TX and RX chainmasks to be overridden by
699 * environment variables and/or device.hints.
701 * This must be done early - before the hardware is
702 * calibrated or before the 802.11n stream calculation
705 if (resource_int_value(device_get_name(sc->sc_dev),
706 device_get_unit(sc->sc_dev), "rx_chainmask",
707 &rx_chainmask) == 0) {
708 device_printf(sc->sc_dev, "Setting RX chainmask to 0x%x\n",
710 (void) ath_hal_setrxchainmask(sc->sc_ah, rx_chainmask);
712 if (resource_int_value(device_get_name(sc->sc_dev),
713 device_get_unit(sc->sc_dev), "tx_chainmask",
714 &tx_chainmask) == 0) {
715 device_printf(sc->sc_dev, "Setting TX chainmask to 0x%x\n",
717 (void) ath_hal_settxchainmask(sc->sc_ah, tx_chainmask);
721 * Disable MRR with protected frames by default.
722 * Only 802.11n series NICs can handle this.
724 sc->sc_mrrprot = 0; /* XXX should be a capability */
727 * Query the enterprise mode information the HAL.
729 if (ath_hal_getcapability(ah, HAL_CAP_ENTERPRISE_MODE, 0,
730 &sc->sc_ent_cfg) == HAL_OK)
733 #ifdef ATH_ENABLE_11N
735 * Query HT capabilities
737 if (ath_hal_getcapability(ah, HAL_CAP_HT, 0, NULL) == HAL_OK &&
738 (wmodes & (HAL_MODE_HT20 | HAL_MODE_HT40))) {
741 device_printf(sc->sc_dev, "[HT] enabling HT modes\n");
743 sc->sc_mrrprot = 1; /* XXX should be a capability */
745 ic->ic_htcaps = IEEE80211_HTC_HT /* HT operation */
746 | IEEE80211_HTC_AMPDU /* A-MPDU tx/rx */
747 | IEEE80211_HTC_AMSDU /* A-MSDU tx/rx */
748 | IEEE80211_HTCAP_MAXAMSDU_3839
749 /* max A-MSDU length */
750 | IEEE80211_HTCAP_SMPS_OFF; /* SM power save off */
754 * Enable short-GI for HT20 only if the hardware
755 * advertises support.
756 * Notably, anything earlier than the AR9287 doesn't.
758 if ((ath_hal_getcapability(ah,
759 HAL_CAP_HT20_SGI, 0, NULL) == HAL_OK) &&
760 (wmodes & HAL_MODE_HT20)) {
761 device_printf(sc->sc_dev,
762 "[HT] enabling short-GI in 20MHz mode\n");
763 ic->ic_htcaps |= IEEE80211_HTCAP_SHORTGI20;
766 if (wmodes & HAL_MODE_HT40)
767 ic->ic_htcaps |= IEEE80211_HTCAP_CHWIDTH40
768 | IEEE80211_HTCAP_SHORTGI40;
771 * TX/RX streams need to be taken into account when
772 * negotiating which MCS rates it'll receive and
773 * what MCS rates are available for TX.
775 (void) ath_hal_getcapability(ah, HAL_CAP_STREAMS, 0, &txs);
776 (void) ath_hal_getcapability(ah, HAL_CAP_STREAMS, 1, &rxs);
778 ath_hal_getrxchainmask(ah, &sc->sc_rxchainmask);
779 ath_hal_gettxchainmask(ah, &sc->sc_txchainmask);
781 ic->ic_txstream = txs;
782 ic->ic_rxstream = rxs;
784 (void) ath_hal_getcapability(ah, HAL_CAP_RTS_AGGR_LIMIT, 1,
785 &sc->sc_rts_aggr_limit);
786 if (sc->sc_rts_aggr_limit != (64 * 1024))
787 device_printf(sc->sc_dev,
788 "[HT] RTS aggregates limited to %d KiB\n",
789 sc->sc_rts_aggr_limit / 1024);
791 device_printf(sc->sc_dev,
792 "[HT] %d RX streams; %d TX streams\n", rxs, txs);
797 * Initial aggregation settings.
799 sc->sc_hwq_limit = ATH_AGGR_MIN_QDEPTH;
800 sc->sc_tid_hwq_lo = ATH_AGGR_SCHED_LOW;
801 sc->sc_tid_hwq_hi = ATH_AGGR_SCHED_HIGH;
802 sc->sc_aggr_limit = ATH_AGGR_MAXSIZE;
803 sc->sc_delim_min_pad = 0;
806 * Check if the hardware requires PCI register serialisation.
807 * Some of the Owl based MACs require this.
810 ath_hal_getcapability(ah, HAL_CAP_SERIALISE_WAR,
811 0, NULL) == HAL_OK) {
812 sc->sc_ah->ah_config.ah_serialise_reg_war = 1;
813 device_printf(sc->sc_dev,
814 "Enabling register serialisation\n");
818 * Indicate we need the 802.11 header padded to a
819 * 32-bit boundary for 4-address and QoS frames.
821 ic->ic_flags |= IEEE80211_F_DATAPAD;
824 * Query the hal about antenna support.
826 sc->sc_defant = ath_hal_getdefantenna(ah);
829 * Not all chips have the VEOL support we want to
830 * use with IBSS beacons; check here for it.
832 sc->sc_hasveol = ath_hal_hasveol(ah);
834 /* get mac address from hardware */
835 ath_hal_getmac(ah, macaddr);
837 ath_hal_getbssidmask(ah, sc->sc_hwbssidmask);
839 /* NB: used to size node table key mapping array */
840 ic->ic_max_keyix = sc->sc_keymax;
841 /* call MI attach routine. */
842 ieee80211_ifattach(ic, macaddr);
843 ic->ic_setregdomain = ath_setregdomain;
844 ic->ic_getradiocaps = ath_getradiocaps;
845 sc->sc_opmode = HAL_M_STA;
847 /* override default methods */
848 ic->ic_newassoc = ath_newassoc;
849 ic->ic_updateslot = ath_updateslot;
850 ic->ic_wme.wme_update = ath_wme_update;
851 ic->ic_vap_create = ath_vap_create;
852 ic->ic_vap_delete = ath_vap_delete;
853 ic->ic_raw_xmit = ath_raw_xmit;
854 ic->ic_update_mcast = ath_update_mcast;
855 ic->ic_update_promisc = ath_update_promisc;
856 ic->ic_node_alloc = ath_node_alloc;
857 sc->sc_node_free = ic->ic_node_free;
858 ic->ic_node_free = ath_node_free;
859 sc->sc_node_cleanup = ic->ic_node_cleanup;
860 ic->ic_node_cleanup = ath_node_cleanup;
861 ic->ic_node_getsignal = ath_node_getsignal;
862 ic->ic_scan_start = ath_scan_start;
863 ic->ic_scan_end = ath_scan_end;
864 ic->ic_set_channel = ath_set_channel;
865 #ifdef ATH_ENABLE_11N
866 /* 802.11n specific - but just override anyway */
867 sc->sc_addba_request = ic->ic_addba_request;
868 sc->sc_addba_response = ic->ic_addba_response;
869 sc->sc_addba_stop = ic->ic_addba_stop;
870 sc->sc_bar_response = ic->ic_bar_response;
871 sc->sc_addba_response_timeout = ic->ic_addba_response_timeout;
873 ic->ic_addba_request = ath_addba_request;
874 ic->ic_addba_response = ath_addba_response;
875 ic->ic_addba_response_timeout = ath_addba_response_timeout;
876 ic->ic_addba_stop = ath_addba_stop;
877 ic->ic_bar_response = ath_bar_response;
879 ic->ic_update_chw = ath_update_chw;
880 #endif /* ATH_ENABLE_11N */
882 #ifdef ATH_ENABLE_RADIOTAP_VENDOR_EXT
884 * There's one vendor bitmap entry in the RX radiotap
885 * header; make sure that's taken into account.
887 ieee80211_radiotap_attachv(ic,
888 &sc->sc_tx_th.wt_ihdr, sizeof(sc->sc_tx_th), 0,
889 ATH_TX_RADIOTAP_PRESENT,
890 &sc->sc_rx_th.wr_ihdr, sizeof(sc->sc_rx_th), 1,
891 ATH_RX_RADIOTAP_PRESENT);
894 * No vendor bitmap/extensions are present.
896 ieee80211_radiotap_attach(ic,
897 &sc->sc_tx_th.wt_ihdr, sizeof(sc->sc_tx_th),
898 ATH_TX_RADIOTAP_PRESENT,
899 &sc->sc_rx_th.wr_ihdr, sizeof(sc->sc_rx_th),
900 ATH_RX_RADIOTAP_PRESENT);
901 #endif /* ATH_ENABLE_RADIOTAP_VENDOR_EXT */
904 * Setup the ALQ logging if required
907 if_ath_alq_init(&sc->sc_alq, device_get_nameunit(sc->sc_dev));
908 if_ath_alq_setcfg(&sc->sc_alq,
909 sc->sc_ah->ah_macVersion,
910 sc->sc_ah->ah_macRev,
911 sc->sc_ah->ah_phyRev,
912 sc->sc_ah->ah_magic);
916 * Setup dynamic sysctl's now that country code and
917 * regdomain are available from the hal.
919 ath_sysctlattach(sc);
920 ath_sysctl_stats_attach(sc);
921 ath_sysctl_hal_attach(sc);
924 ieee80211_announce(ic);
930 ath_txdma_teardown(sc);
931 ath_rxdma_teardown(sc);
937 * To work around scoping issues with CURVNET_SET/CURVNET_RESTORE..
939 if (ifp != NULL && ifp->if_vnet) {
940 CURVNET_SET(ifp->if_vnet);
943 } else if (ifp != NULL)
950 ath_detach(struct ath_softc *sc)
952 struct ifnet *ifp = sc->sc_ifp;
954 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n",
955 __func__, ifp->if_flags);
958 * NB: the order of these is important:
959 * o stop the chip so no more interrupts will fire
960 * o call the 802.11 layer before detaching the hal to
961 * insure callbacks into the driver to delete global
962 * key cache entries can be handled
963 * o free the taskqueue which drains any pending tasks
964 * o reclaim the tx queue data structures after calling
965 * the 802.11 layer as we'll get called back to reclaim
966 * node state and potentially want to use them
967 * o to cleanup the tx queues the hal is called, so detach
969 * Other than that, it's straightforward...
972 ieee80211_ifdetach(ifp->if_l2com);
973 taskqueue_free(sc->sc_tq);
975 if (sc->sc_tx99 != NULL)
976 sc->sc_tx99->detach(sc->sc_tx99);
978 ath_rate_detach(sc->sc_rc);
980 if_ath_alq_tidyup(&sc->sc_alq);
982 ath_spectral_detach(sc);
985 ath_txdma_teardown(sc);
986 ath_rxdma_teardown(sc);
988 ath_hal_detach(sc->sc_ah); /* NB: sets chip in full sleep */
990 CURVNET_SET(ifp->if_vnet);
998 * MAC address handling for multiple BSS on the same radio.
999 * The first vap uses the MAC address from the EEPROM. For
1000 * subsequent vap's we set the U/L bit (bit 1) in the MAC
1001 * address and use the next six bits as an index.
1004 assign_address(struct ath_softc *sc, uint8_t mac[IEEE80211_ADDR_LEN], int clone)
1008 if (clone && sc->sc_hasbmask) {
1009 /* NB: we only do this if h/w supports multiple bssid */
1010 for (i = 0; i < 8; i++)
1011 if ((sc->sc_bssidmask & (1<<i)) == 0)
1014 mac[0] |= (i << 2)|0x2;
1017 sc->sc_bssidmask |= 1<<i;
1018 sc->sc_hwbssidmask[0] &= ~mac[0];
1024 reclaim_address(struct ath_softc *sc, const uint8_t mac[IEEE80211_ADDR_LEN])
1026 int i = mac[0] >> 2;
1029 if (i != 0 || --sc->sc_nbssid0 == 0) {
1030 sc->sc_bssidmask &= ~(1<<i);
1031 /* recalculate bssid mask from remaining addresses */
1033 for (i = 1; i < 8; i++)
1034 if (sc->sc_bssidmask & (1<<i))
1035 mask &= ~((i<<2)|0x2);
1036 sc->sc_hwbssidmask[0] |= mask;
1041 * Assign a beacon xmit slot. We try to space out
1042 * assignments so when beacons are staggered the
1043 * traffic coming out of the cab q has maximal time
1044 * to go out before the next beacon is scheduled.
1047 assign_bslot(struct ath_softc *sc)
1052 for (slot = 0; slot < ATH_BCBUF; slot++)
1053 if (sc->sc_bslot[slot] == NULL) {
1054 if (sc->sc_bslot[(slot+1)%ATH_BCBUF] == NULL &&
1055 sc->sc_bslot[(slot-1)%ATH_BCBUF] == NULL)
1058 /* NB: keep looking for a double slot */
1063 static struct ieee80211vap *
1064 ath_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
1065 enum ieee80211_opmode opmode, int flags,
1066 const uint8_t bssid[IEEE80211_ADDR_LEN],
1067 const uint8_t mac0[IEEE80211_ADDR_LEN])
1069 struct ath_softc *sc = ic->ic_ifp->if_softc;
1070 struct ath_vap *avp;
1071 struct ieee80211vap *vap;
1072 uint8_t mac[IEEE80211_ADDR_LEN];
1073 int needbeacon, error;
1074 enum ieee80211_opmode ic_opmode;
1076 avp = (struct ath_vap *) malloc(sizeof(struct ath_vap),
1077 M_80211_VAP, M_WAITOK | M_ZERO);
1079 IEEE80211_ADDR_COPY(mac, mac0);
1082 ic_opmode = opmode; /* default to opmode of new vap */
1084 case IEEE80211_M_STA:
1085 if (sc->sc_nstavaps != 0) { /* XXX only 1 for now */
1086 device_printf(sc->sc_dev, "only 1 sta vap supported\n");
1091 * With multiple vaps we must fall back
1092 * to s/w beacon miss handling.
1094 flags |= IEEE80211_CLONE_NOBEACONS;
1096 if (flags & IEEE80211_CLONE_NOBEACONS) {
1098 * Station mode w/o beacons are implemented w/ AP mode.
1100 ic_opmode = IEEE80211_M_HOSTAP;
1103 case IEEE80211_M_IBSS:
1104 if (sc->sc_nvaps != 0) { /* XXX only 1 for now */
1105 device_printf(sc->sc_dev,
1106 "only 1 ibss vap supported\n");
1111 case IEEE80211_M_AHDEMO:
1112 #ifdef IEEE80211_SUPPORT_TDMA
1113 if (flags & IEEE80211_CLONE_TDMA) {
1114 if (sc->sc_nvaps != 0) {
1115 device_printf(sc->sc_dev,
1116 "only 1 tdma vap supported\n");
1120 flags |= IEEE80211_CLONE_NOBEACONS;
1124 case IEEE80211_M_MONITOR:
1125 if (sc->sc_nvaps != 0 && ic->ic_opmode != opmode) {
1127 * Adopt existing mode. Adding a monitor or ahdemo
1128 * vap to an existing configuration is of dubious
1129 * value but should be ok.
1131 /* XXX not right for monitor mode */
1132 ic_opmode = ic->ic_opmode;
1135 case IEEE80211_M_HOSTAP:
1136 case IEEE80211_M_MBSS:
1139 case IEEE80211_M_WDS:
1140 if (sc->sc_nvaps != 0 && ic->ic_opmode == IEEE80211_M_STA) {
1141 device_printf(sc->sc_dev,
1142 "wds not supported in sta mode\n");
1146 * Silently remove any request for a unique
1147 * bssid; WDS vap's always share the local
1150 flags &= ~IEEE80211_CLONE_BSSID;
1151 if (sc->sc_nvaps == 0)
1152 ic_opmode = IEEE80211_M_HOSTAP;
1154 ic_opmode = ic->ic_opmode;
1157 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode);
1161 * Check that a beacon buffer is available; the code below assumes it.
1163 if (needbeacon & TAILQ_EMPTY(&sc->sc_bbuf)) {
1164 device_printf(sc->sc_dev, "no beacon buffer available\n");
1169 if (opmode == IEEE80211_M_HOSTAP || opmode == IEEE80211_M_MBSS) {
1170 assign_address(sc, mac, flags & IEEE80211_CLONE_BSSID);
1171 ath_hal_setbssidmask(sc->sc_ah, sc->sc_hwbssidmask);
1175 /* XXX can't hold mutex across if_alloc */
1177 error = ieee80211_vap_setup(ic, vap, name, unit, opmode, flags,
1181 device_printf(sc->sc_dev, "%s: error %d creating vap\n",
1186 /* h/w crypto support */
1187 vap->iv_key_alloc = ath_key_alloc;
1188 vap->iv_key_delete = ath_key_delete;
1189 vap->iv_key_set = ath_key_set;
1190 vap->iv_key_update_begin = ath_key_update_begin;
1191 vap->iv_key_update_end = ath_key_update_end;
1193 /* override various methods */
1194 avp->av_recv_mgmt = vap->iv_recv_mgmt;
1195 vap->iv_recv_mgmt = ath_recv_mgmt;
1196 vap->iv_reset = ath_reset_vap;
1197 vap->iv_update_beacon = ath_beacon_update;
1198 avp->av_newstate = vap->iv_newstate;
1199 vap->iv_newstate = ath_newstate;
1200 avp->av_bmiss = vap->iv_bmiss;
1201 vap->iv_bmiss = ath_bmiss_vap;
1203 avp->av_node_ps = vap->iv_node_ps;
1204 vap->iv_node_ps = ath_node_powersave;
1206 avp->av_set_tim = vap->iv_set_tim;
1207 vap->iv_set_tim = ath_node_set_tim;
1209 /* Set default parameters */
1212 * Anything earlier than some AR9300 series MACs don't
1213 * support a smaller MPDU density.
1215 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_8;
1217 * All NICs can handle the maximum size, however
1218 * AR5416 based MACs can only TX aggregates w/ RTS
1219 * protection when the total aggregate size is <= 8k.
1220 * However, for now that's enforced by the TX path.
1222 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_64K;
1227 * Allocate beacon state and setup the q for buffered
1228 * multicast frames. We know a beacon buffer is
1229 * available because we checked above.
1231 avp->av_bcbuf = TAILQ_FIRST(&sc->sc_bbuf);
1232 TAILQ_REMOVE(&sc->sc_bbuf, avp->av_bcbuf, bf_list);
1233 if (opmode != IEEE80211_M_IBSS || !sc->sc_hasveol) {
1235 * Assign the vap to a beacon xmit slot. As above
1236 * this cannot fail to find a free one.
1238 avp->av_bslot = assign_bslot(sc);
1239 KASSERT(sc->sc_bslot[avp->av_bslot] == NULL,
1240 ("beacon slot %u not empty", avp->av_bslot));
1241 sc->sc_bslot[avp->av_bslot] = vap;
1244 if (sc->sc_hastsfadd && sc->sc_nbcnvaps > 0) {
1246 * Multple vaps are to transmit beacons and we
1247 * have h/w support for TSF adjusting; enable
1248 * use of staggered beacons.
1250 sc->sc_stagbeacons = 1;
1252 ath_txq_init(sc, &avp->av_mcastq, ATH_TXQ_SWQ);
1255 ic->ic_opmode = ic_opmode;
1256 if (opmode != IEEE80211_M_WDS) {
1258 if (opmode == IEEE80211_M_STA)
1260 if (opmode == IEEE80211_M_MBSS)
1263 switch (ic_opmode) {
1264 case IEEE80211_M_IBSS:
1265 sc->sc_opmode = HAL_M_IBSS;
1267 case IEEE80211_M_STA:
1268 sc->sc_opmode = HAL_M_STA;
1270 case IEEE80211_M_AHDEMO:
1271 #ifdef IEEE80211_SUPPORT_TDMA
1272 if (vap->iv_caps & IEEE80211_C_TDMA) {
1274 /* NB: disable tsf adjust */
1275 sc->sc_stagbeacons = 0;
1278 * NB: adhoc demo mode is a pseudo mode; to the hal it's
1283 case IEEE80211_M_HOSTAP:
1284 case IEEE80211_M_MBSS:
1285 sc->sc_opmode = HAL_M_HOSTAP;
1287 case IEEE80211_M_MONITOR:
1288 sc->sc_opmode = HAL_M_MONITOR;
1291 /* XXX should not happen */
1294 if (sc->sc_hastsfadd) {
1296 * Configure whether or not TSF adjust should be done.
1298 ath_hal_settsfadjust(sc->sc_ah, sc->sc_stagbeacons);
1300 if (flags & IEEE80211_CLONE_NOBEACONS) {
1302 * Enable s/w beacon miss handling.
1308 /* complete setup */
1309 ieee80211_vap_attach(vap, ath_media_change, ieee80211_media_status);
1312 reclaim_address(sc, mac);
1313 ath_hal_setbssidmask(sc->sc_ah, sc->sc_hwbssidmask);
1315 free(avp, M_80211_VAP);
1321 ath_vap_delete(struct ieee80211vap *vap)
1323 struct ieee80211com *ic = vap->iv_ic;
1324 struct ifnet *ifp = ic->ic_ifp;
1325 struct ath_softc *sc = ifp->if_softc;
1326 struct ath_hal *ah = sc->sc_ah;
1327 struct ath_vap *avp = ATH_VAP(vap);
1329 DPRINTF(sc, ATH_DEBUG_RESET, "%s: called\n", __func__);
1330 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1332 * Quiesce the hardware while we remove the vap. In
1333 * particular we need to reclaim all references to
1334 * the vap state by any frames pending on the tx queues.
1336 ath_hal_intrset(ah, 0); /* disable interrupts */
1337 ath_draintxq(sc, ATH_RESET_DEFAULT); /* stop hw xmit side */
1338 /* XXX Do all frames from all vaps/nodes need draining here? */
1339 ath_stoprecv(sc, 1); /* stop recv side */
1342 ieee80211_vap_detach(vap);
1345 * XXX Danger Will Robinson! Danger!
1347 * Because ieee80211_vap_detach() can queue a frame (the station
1348 * diassociate message?) after we've drained the TXQ and
1349 * flushed the software TXQ, we will end up with a frame queued
1350 * to a node whose vap is about to be freed.
1352 * To work around this, flush the hardware/software again.
1353 * This may be racy - the ath task may be running and the packet
1354 * may be being scheduled between sw->hw txq. Tsk.
1356 * TODO: figure out why a new node gets allocated somewhere around
1357 * here (after the ath_tx_swq() call; and after an ath_stop_locked()
1361 ath_draintxq(sc, ATH_RESET_DEFAULT);
1365 * Reclaim beacon state. Note this must be done before
1366 * the vap instance is reclaimed as we may have a reference
1367 * to it in the buffer for the beacon frame.
1369 if (avp->av_bcbuf != NULL) {
1370 if (avp->av_bslot != -1) {
1371 sc->sc_bslot[avp->av_bslot] = NULL;
1374 ath_beacon_return(sc, avp->av_bcbuf);
1375 avp->av_bcbuf = NULL;
1376 if (sc->sc_nbcnvaps == 0) {
1377 sc->sc_stagbeacons = 0;
1378 if (sc->sc_hastsfadd)
1379 ath_hal_settsfadjust(sc->sc_ah, 0);
1382 * Reclaim any pending mcast frames for the vap.
1384 ath_tx_draintxq(sc, &avp->av_mcastq);
1387 * Update bookkeeping.
1389 if (vap->iv_opmode == IEEE80211_M_STA) {
1391 if (sc->sc_nstavaps == 0 && sc->sc_swbmiss)
1393 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
1394 vap->iv_opmode == IEEE80211_M_MBSS) {
1395 reclaim_address(sc, vap->iv_myaddr);
1396 ath_hal_setbssidmask(ah, sc->sc_hwbssidmask);
1397 if (vap->iv_opmode == IEEE80211_M_MBSS)
1400 if (vap->iv_opmode != IEEE80211_M_WDS)
1402 #ifdef IEEE80211_SUPPORT_TDMA
1403 /* TDMA operation ceases when the last vap is destroyed */
1404 if (sc->sc_tdma && sc->sc_nvaps == 0) {
1409 free(avp, M_80211_VAP);
1411 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1413 * Restart rx+tx machines if still running (RUNNING will
1414 * be reset if we just destroyed the last vap).
1416 if (ath_startrecv(sc) != 0)
1417 if_printf(ifp, "%s: unable to restart recv logic\n",
1419 if (sc->sc_beacons) { /* restart beacons */
1420 #ifdef IEEE80211_SUPPORT_TDMA
1422 ath_tdma_config(sc, NULL);
1425 ath_beacon_config(sc, NULL);
1427 ath_hal_intrset(ah, sc->sc_imask);
1433 ath_suspend(struct ath_softc *sc)
1435 struct ifnet *ifp = sc->sc_ifp;
1436 struct ieee80211com *ic = ifp->if_l2com;
1438 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n",
1439 __func__, ifp->if_flags);
1441 sc->sc_resume_up = (ifp->if_flags & IFF_UP) != 0;
1443 ieee80211_suspend_all(ic);
1445 * NB: don't worry about putting the chip in low power
1446 * mode; pci will power off our socket on suspend and
1447 * CardBus detaches the device.
1451 * XXX ensure none of the taskqueues are running
1452 * XXX ensure sc_invalid is 1
1453 * XXX ensure the calibration callout is disabled
1456 /* Disable the PCIe PHY, complete with workarounds */
1457 ath_hal_enablepcie(sc->sc_ah, 1, 1);
1461 * Reset the key cache since some parts do not reset the
1462 * contents on resume. First we clear all entries, then
1463 * re-load keys that the 802.11 layer assumes are setup
1467 ath_reset_keycache(struct ath_softc *sc)
1469 struct ifnet *ifp = sc->sc_ifp;
1470 struct ieee80211com *ic = ifp->if_l2com;
1471 struct ath_hal *ah = sc->sc_ah;
1474 for (i = 0; i < sc->sc_keymax; i++)
1475 ath_hal_keyreset(ah, i);
1476 ieee80211_crypto_reload_keys(ic);
1480 ath_resume(struct ath_softc *sc)
1482 struct ifnet *ifp = sc->sc_ifp;
1483 struct ieee80211com *ic = ifp->if_l2com;
1484 struct ath_hal *ah = sc->sc_ah;
1487 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n",
1488 __func__, ifp->if_flags);
1490 /* Re-enable PCIe, re-enable the PCIe bus */
1491 ath_hal_enablepcie(ah, 0, 0);
1494 * Must reset the chip before we reload the
1495 * keycache as we were powered down on suspend.
1497 ath_hal_reset(ah, sc->sc_opmode,
1498 sc->sc_curchan != NULL ? sc->sc_curchan : ic->ic_curchan,
1500 ath_reset_keycache(sc);
1502 /* Let DFS at it in case it's a DFS channel */
1503 ath_dfs_radar_enable(sc, ic->ic_curchan);
1505 /* Let spectral at in case spectral is enabled */
1506 ath_spectral_enable(sc, ic->ic_curchan);
1508 /* Restore the LED configuration */
1510 ath_hal_setledstate(ah, HAL_LED_INIT);
1512 if (sc->sc_resume_up)
1513 ieee80211_resume_all(ic);
1519 ath_shutdown(struct ath_softc *sc)
1521 struct ifnet *ifp = sc->sc_ifp;
1523 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n",
1524 __func__, ifp->if_flags);
1527 /* NB: no point powering down chip as we're about to reboot */
1531 * Interrupt handler. Most of the actual processing is deferred.
1536 struct ath_softc *sc = arg;
1537 struct ifnet *ifp = sc->sc_ifp;
1538 struct ath_hal *ah = sc->sc_ah;
1543 * If we're inside a reset path, just print a warning and
1544 * clear the ISR. The reset routine will finish it for us.
1547 if (sc->sc_inreset_cnt) {
1549 ath_hal_getisr(ah, &status); /* clear ISR */
1550 ath_hal_intrset(ah, 0); /* disable further intr's */
1551 DPRINTF(sc, ATH_DEBUG_ANY,
1552 "%s: in reset, ignoring: status=0x%x\n",
1558 if (sc->sc_invalid) {
1560 * The hardware is not ready/present, don't touch anything.
1561 * Note this can happen early on if the IRQ is shared.
1563 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid; ignored\n", __func__);
1567 if (!ath_hal_intrpend(ah)) { /* shared irq, not for us */
1572 if ((ifp->if_flags & IFF_UP) == 0 ||
1573 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1576 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n",
1577 __func__, ifp->if_flags);
1578 ath_hal_getisr(ah, &status); /* clear ISR */
1579 ath_hal_intrset(ah, 0); /* disable further intr's */
1585 * Figure out the reason(s) for the interrupt. Note
1586 * that the hal returns a pseudo-ISR that may include
1587 * bits we haven't explicitly enabled so we mask the
1588 * value to insure we only process bits we requested.
1590 ath_hal_getisr(ah, &status); /* NB: clears ISR too */
1591 DPRINTF(sc, ATH_DEBUG_INTR, "%s: status 0x%x\n", __func__, status);
1592 ATH_KTR(sc, ATH_KTR_INTERRUPTS, 1, "ath_intr: mask=0x%.8x", status);
1593 #ifdef ATH_DEBUG_ALQ
1594 if_ath_alq_post_intr(&sc->sc_alq, status, ah->ah_intrstate,
1596 #endif /* ATH_DEBUG_ALQ */
1597 #ifdef ATH_KTR_INTR_DEBUG
1598 ATH_KTR(sc, ATH_KTR_INTERRUPTS, 5,
1599 "ath_intr: ISR=0x%.8x, ISR_S0=0x%.8x, ISR_S1=0x%.8x, ISR_S2=0x%.8x, ISR_S5=0x%.8x",
1600 ah->ah_intrstate[0],
1601 ah->ah_intrstate[1],
1602 ah->ah_intrstate[2],
1603 ah->ah_intrstate[3],
1604 ah->ah_intrstate[6]);
1607 /* Squirrel away SYNC interrupt debugging */
1608 if (ah->ah_syncstate != 0) {
1610 for (i = 0; i < 32; i++)
1611 if (ah->ah_syncstate & (i << i))
1612 sc->sc_intr_stats.sync_intr[i]++;
1615 status &= sc->sc_imask; /* discard unasked for bits */
1617 /* Short-circuit un-handled interrupts */
1618 if (status == 0x0) {
1624 * Take a note that we're inside the interrupt handler, so
1625 * the reset routines know to wait.
1631 * Handle the interrupt. We won't run concurrent with the reset
1632 * or channel change routines as they'll wait for sc_intr_cnt
1633 * to be 0 before continuing.
1635 if (status & HAL_INT_FATAL) {
1636 sc->sc_stats.ast_hardware++;
1637 ath_hal_intrset(ah, 0); /* disable intr's until reset */
1638 taskqueue_enqueue(sc->sc_tq, &sc->sc_fataltask);
1640 if (status & HAL_INT_SWBA) {
1642 * Software beacon alert--time to send a beacon.
1643 * Handle beacon transmission directly; deferring
1644 * this is too slow to meet timing constraints
1647 #ifdef IEEE80211_SUPPORT_TDMA
1649 if (sc->sc_tdmaswba == 0) {
1650 struct ieee80211com *ic = ifp->if_l2com;
1651 struct ieee80211vap *vap =
1652 TAILQ_FIRST(&ic->ic_vaps);
1653 ath_tdma_beacon_send(sc, vap);
1655 vap->iv_tdma->tdma_bintval;
1661 ath_beacon_proc(sc, 0);
1662 #ifdef IEEE80211_SUPPORT_SUPERG
1664 * Schedule the rx taskq in case there's no
1665 * traffic so any frames held on the staging
1666 * queue are aged and potentially flushed.
1668 taskqueue_enqueue(sc->sc_tq, &sc->sc_rxtask);
1672 if (status & HAL_INT_RXEOL) {
1674 ATH_KTR(sc, ATH_KTR_ERROR, 0, "ath_intr: RXEOL");
1677 * NB: the hardware should re-read the link when
1678 * RXE bit is written, but it doesn't work at
1679 * least on older hardware revs.
1681 sc->sc_stats.ast_rxeol++;
1683 * Disable RXEOL/RXORN - prevent an interrupt
1684 * storm until the PCU logic can be reset.
1685 * In case the interface is reset some other
1686 * way before "sc_kickpcu" is called, don't
1687 * modify sc_imask - that way if it is reset
1688 * by a call to ath_reset() somehow, the
1689 * interrupt mask will be correctly reprogrammed.
1691 imask = sc->sc_imask;
1692 imask &= ~(HAL_INT_RXEOL | HAL_INT_RXORN);
1693 ath_hal_intrset(ah, imask);
1695 * Only blank sc_rxlink if we've not yet kicked
1698 * This isn't entirely correct - the correct solution
1699 * would be to have a PCU lock and engage that for
1700 * the duration of the PCU fiddling; which would include
1701 * running the RX process. Otherwise we could end up
1702 * messing up the RX descriptor chain and making the
1703 * RX desc list much shorter.
1705 if (! sc->sc_kickpcu)
1706 sc->sc_rxlink = NULL;
1709 * Enqueue an RX proc, to handled whatever
1710 * is in the RX queue.
1711 * This will then kick the PCU.
1713 taskqueue_enqueue(sc->sc_tq, &sc->sc_rxtask);
1716 if (status & HAL_INT_TXURN) {
1717 sc->sc_stats.ast_txurn++;
1718 /* bump tx trigger level */
1719 ath_hal_updatetxtriglevel(ah, AH_TRUE);
1722 * Handle both the legacy and RX EDMA interrupt bits.
1723 * Note that HAL_INT_RXLP is also HAL_INT_RXDESC.
1725 if (status & (HAL_INT_RX | HAL_INT_RXHP | HAL_INT_RXLP)) {
1726 sc->sc_stats.ast_rx_intr++;
1727 taskqueue_enqueue(sc->sc_tq, &sc->sc_rxtask);
1729 if (status & HAL_INT_TX) {
1730 sc->sc_stats.ast_tx_intr++;
1732 * Grab all the currently set bits in the HAL txq bitmap
1733 * and blank them. This is the only place we should be
1736 if (! sc->sc_isedma) {
1739 ath_hal_gettxintrtxqs(sc->sc_ah, &txqs);
1740 ATH_KTR(sc, ATH_KTR_INTERRUPTS, 3,
1741 "ath_intr: TX; txqs=0x%08x, txq_active was 0x%08x, now 0x%08x",
1744 sc->sc_txq_active | txqs);
1745 sc->sc_txq_active |= txqs;
1748 taskqueue_enqueue(sc->sc_tq, &sc->sc_txtask);
1750 if (status & HAL_INT_BMISS) {
1751 sc->sc_stats.ast_bmiss++;
1752 taskqueue_enqueue(sc->sc_tq, &sc->sc_bmisstask);
1754 if (status & HAL_INT_GTT)
1755 sc->sc_stats.ast_tx_timeout++;
1756 if (status & HAL_INT_CST)
1757 sc->sc_stats.ast_tx_cst++;
1758 if (status & HAL_INT_MIB) {
1759 sc->sc_stats.ast_mib++;
1762 * Disable interrupts until we service the MIB
1763 * interrupt; otherwise it will continue to fire.
1765 ath_hal_intrset(ah, 0);
1767 * Let the hal handle the event. We assume it will
1768 * clear whatever condition caused the interrupt.
1770 ath_hal_mibevent(ah, &sc->sc_halstats);
1772 * Don't reset the interrupt if we've just
1773 * kicked the PCU, or we may get a nested
1774 * RXEOL before the rxproc has had a chance
1777 if (sc->sc_kickpcu == 0)
1778 ath_hal_intrset(ah, sc->sc_imask);
1781 if (status & HAL_INT_RXORN) {
1782 /* NB: hal marks HAL_INT_FATAL when RXORN is fatal */
1783 ATH_KTR(sc, ATH_KTR_ERROR, 0, "ath_intr: RXORN");
1784 sc->sc_stats.ast_rxorn++;
1793 ath_fatal_proc(void *arg, int pending)
1795 struct ath_softc *sc = arg;
1796 struct ifnet *ifp = sc->sc_ifp;
1801 if_printf(ifp, "hardware error; resetting\n");
1803 * Fatal errors are unrecoverable. Typically these
1804 * are caused by DMA errors. Collect h/w state from
1805 * the hal so we can diagnose what's going on.
1807 if (ath_hal_getfatalstate(sc->sc_ah, &sp, &len)) {
1808 KASSERT(len >= 6*sizeof(u_int32_t), ("len %u bytes", len));
1810 if_printf(ifp, "0x%08x 0x%08x 0x%08x, 0x%08x 0x%08x 0x%08x\n",
1811 state[0], state[1] , state[2], state[3],
1812 state[4], state[5]);
1814 ath_reset(ifp, ATH_RESET_NOLOSS);
1818 ath_bmiss_vap(struct ieee80211vap *vap)
1821 * Workaround phantom bmiss interrupts by sanity-checking
1822 * the time of our last rx'd frame. If it is within the
1823 * beacon miss interval then ignore the interrupt. If it's
1824 * truly a bmiss we'll get another interrupt soon and that'll
1825 * be dispatched up for processing. Note this applies only
1826 * for h/w beacon miss events.
1828 if ((vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) == 0) {
1829 struct ifnet *ifp = vap->iv_ic->ic_ifp;
1830 struct ath_softc *sc = ifp->if_softc;
1831 u_int64_t lastrx = sc->sc_lastrx;
1832 u_int64_t tsf = ath_hal_gettsf64(sc->sc_ah);
1833 /* XXX should take a locked ref to iv_bss */
1834 u_int bmisstimeout =
1835 vap->iv_bmissthreshold * vap->iv_bss->ni_intval * 1024;
1837 DPRINTF(sc, ATH_DEBUG_BEACON,
1838 "%s: tsf %llu lastrx %lld (%llu) bmiss %u\n",
1839 __func__, (unsigned long long) tsf,
1840 (unsigned long long)(tsf - lastrx),
1841 (unsigned long long) lastrx, bmisstimeout);
1843 if (tsf - lastrx <= bmisstimeout) {
1844 sc->sc_stats.ast_bmiss_phantom++;
1848 ATH_VAP(vap)->av_bmiss(vap);
1852 ath_hal_gethangstate(struct ath_hal *ah, uint32_t mask, uint32_t *hangs)
1857 if (!ath_hal_getdiagstate(ah, HAL_DIAG_CHECK_HANGS, &mask, sizeof(mask), &sp, &rsize))
1859 KASSERT(rsize == sizeof(uint32_t), ("resultsize %u", rsize));
1860 *hangs = *(uint32_t *)sp;
1865 ath_bmiss_proc(void *arg, int pending)
1867 struct ath_softc *sc = arg;
1868 struct ifnet *ifp = sc->sc_ifp;
1871 DPRINTF(sc, ATH_DEBUG_ANY, "%s: pending %u\n", __func__, pending);
1874 * Do a reset upon any becaon miss event.
1876 * It may be a non-recognised RX clear hang which needs a reset
1879 if (ath_hal_gethangstate(sc->sc_ah, 0xff, &hangs) && hangs != 0) {
1880 ath_reset(ifp, ATH_RESET_NOLOSS);
1881 if_printf(ifp, "bb hang detected (0x%x), resetting\n", hangs);
1883 ath_reset(ifp, ATH_RESET_NOLOSS);
1884 ieee80211_beacon_miss(ifp->if_l2com);
1889 * Handle TKIP MIC setup to deal hardware that doesn't do MIC
1890 * calcs together with WME. If necessary disable the crypto
1891 * hardware and mark the 802.11 state so keys will be setup
1892 * with the MIC work done in software.
1895 ath_settkipmic(struct ath_softc *sc)
1897 struct ifnet *ifp = sc->sc_ifp;
1898 struct ieee80211com *ic = ifp->if_l2com;
1900 if ((ic->ic_cryptocaps & IEEE80211_CRYPTO_TKIP) && !sc->sc_wmetkipmic) {
1901 if (ic->ic_flags & IEEE80211_F_WME) {
1902 ath_hal_settkipmic(sc->sc_ah, AH_FALSE);
1903 ic->ic_cryptocaps &= ~IEEE80211_CRYPTO_TKIPMIC;
1905 ath_hal_settkipmic(sc->sc_ah, AH_TRUE);
1906 ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIPMIC;
1914 struct ath_softc *sc = (struct ath_softc *) arg;
1915 struct ifnet *ifp = sc->sc_ifp;
1916 struct ieee80211com *ic = ifp->if_l2com;
1917 struct ath_hal *ah = sc->sc_ah;
1920 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n",
1921 __func__, ifp->if_flags);
1925 * Stop anything previously setup. This is safe
1926 * whether this is the first time through or not.
1928 ath_stop_locked(ifp);
1931 * The basic interface to setting the hardware in a good
1932 * state is ``reset''. On return the hardware is known to
1933 * be powered up and with interrupts disabled. This must
1934 * be followed by initialization of the appropriate bits
1935 * and then setup of the interrupt mask.
1938 if (!ath_hal_reset(ah, sc->sc_opmode, ic->ic_curchan, AH_FALSE, &status)) {
1939 if_printf(ifp, "unable to reset hardware; hal status %u\n",
1944 ath_chan_change(sc, ic->ic_curchan);
1946 /* Let DFS at it in case it's a DFS channel */
1947 ath_dfs_radar_enable(sc, ic->ic_curchan);
1949 /* Let spectral at in case spectral is enabled */
1950 ath_spectral_enable(sc, ic->ic_curchan);
1953 * Likewise this is set during reset so update
1954 * state cached in the driver.
1956 sc->sc_diversity = ath_hal_getdiversity(ah);
1957 sc->sc_lastlongcal = 0;
1958 sc->sc_resetcal = 1;
1959 sc->sc_lastcalreset = 0;
1961 sc->sc_lastshortcal = 0;
1962 sc->sc_doresetcal = AH_FALSE;
1964 * Beacon timers were cleared here; give ath_newstate()
1965 * a hint that the beacon timers should be poked when
1966 * things transition to the RUN state.
1971 * Setup the hardware after reset: the key cache
1972 * is filled as needed and the receive engine is
1973 * set going. Frame transmit is handled entirely
1974 * in the frame output path; there's nothing to do
1975 * here except setup the interrupt mask.
1977 if (ath_startrecv(sc) != 0) {
1978 if_printf(ifp, "unable to start recv logic\n");
1984 * Enable interrupts.
1986 sc->sc_imask = HAL_INT_RX | HAL_INT_TX
1987 | HAL_INT_RXEOL | HAL_INT_RXORN
1989 | HAL_INT_FATAL | HAL_INT_GLOBAL;
1992 * Enable RX EDMA bits. Note these overlap with
1993 * HAL_INT_RX and HAL_INT_RXDESC respectively.
1996 sc->sc_imask |= (HAL_INT_RXHP | HAL_INT_RXLP);
1999 * Enable MIB interrupts when there are hardware phy counters.
2000 * Note we only do this (at the moment) for station mode.
2002 if (sc->sc_needmib && ic->ic_opmode == IEEE80211_M_STA)
2003 sc->sc_imask |= HAL_INT_MIB;
2005 /* Enable global TX timeout and carrier sense timeout if available */
2006 if (ath_hal_gtxto_supported(ah))
2007 sc->sc_imask |= HAL_INT_GTT;
2009 DPRINTF(sc, ATH_DEBUG_RESET, "%s: imask=0x%x\n",
2010 __func__, sc->sc_imask);
2012 ifp->if_drv_flags |= IFF_DRV_RUNNING;
2013 callout_reset(&sc->sc_wd_ch, hz, ath_watchdog, sc);
2014 ath_hal_intrset(ah, sc->sc_imask);
2018 #ifdef ATH_TX99_DIAG
2019 if (sc->sc_tx99 != NULL)
2020 sc->sc_tx99->start(sc->sc_tx99);
2023 ieee80211_start_all(ic); /* start all vap's */
2027 ath_stop_locked(struct ifnet *ifp)
2029 struct ath_softc *sc = ifp->if_softc;
2030 struct ath_hal *ah = sc->sc_ah;
2032 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid %u if_flags 0x%x\n",
2033 __func__, sc->sc_invalid, ifp->if_flags);
2035 ATH_LOCK_ASSERT(sc);
2036 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
2038 * Shutdown the hardware and driver:
2039 * reset 802.11 state machine
2041 * disable interrupts
2042 * turn off the radio
2043 * clear transmit machinery
2044 * clear receive machinery
2045 * drain and release tx queues
2046 * reclaim beacon resources
2047 * power down hardware
2049 * Note that some of this work is not possible if the
2050 * hardware is gone (invalid).
2052 #ifdef ATH_TX99_DIAG
2053 if (sc->sc_tx99 != NULL)
2054 sc->sc_tx99->stop(sc->sc_tx99);
2056 callout_stop(&sc->sc_wd_ch);
2057 sc->sc_wd_timer = 0;
2058 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
2059 if (!sc->sc_invalid) {
2060 if (sc->sc_softled) {
2061 callout_stop(&sc->sc_ledtimer);
2062 ath_hal_gpioset(ah, sc->sc_ledpin,
2064 sc->sc_blinking = 0;
2066 ath_hal_intrset(ah, 0);
2068 ath_draintxq(sc, ATH_RESET_DEFAULT);
2069 if (!sc->sc_invalid) {
2070 ath_stoprecv(sc, 1);
2071 ath_hal_phydisable(ah);
2073 sc->sc_rxlink = NULL;
2074 ath_beacon_free(sc); /* XXX not needed */
2078 #define MAX_TXRX_ITERATIONS 1000
2080 ath_txrx_stop_locked(struct ath_softc *sc)
2082 int i = MAX_TXRX_ITERATIONS;
2084 ATH_UNLOCK_ASSERT(sc);
2085 ATH_PCU_LOCK_ASSERT(sc);
2088 * Sleep until all the pending operations have completed.
2090 * The caller must ensure that reset has been incremented
2091 * or the pending operations may continue being queued.
2093 while (sc->sc_rxproc_cnt || sc->sc_txproc_cnt ||
2094 sc->sc_txstart_cnt || sc->sc_intr_cnt) {
2097 msleep(sc, &sc->sc_pcu_mtx, 0, "ath_txrx_stop", 1);
2102 device_printf(sc->sc_dev,
2103 "%s: didn't finish after %d iterations\n",
2104 __func__, MAX_TXRX_ITERATIONS);
2106 #undef MAX_TXRX_ITERATIONS
2110 ath_txrx_stop(struct ath_softc *sc)
2112 ATH_UNLOCK_ASSERT(sc);
2113 ATH_PCU_UNLOCK_ASSERT(sc);
2116 ath_txrx_stop_locked(sc);
2122 ath_txrx_start(struct ath_softc *sc)
2125 taskqueue_unblock(sc->sc_tq);
2129 * Grab the reset lock, and wait around until noone else
2130 * is trying to do anything with it.
2132 * This is totally horrible but we can't hold this lock for
2133 * long enough to do TX/RX or we end up with net80211/ip stack
2134 * LORs and eventual deadlock.
2136 * "dowait" signals whether to spin, waiting for the reset
2137 * lock count to reach 0. This should (for now) only be used
2138 * during the reset path, as the rest of the code may not
2139 * be locking-reentrant enough to behave correctly.
2141 * Another, cleaner way should be found to serialise all of
2144 #define MAX_RESET_ITERATIONS 10
2146 ath_reset_grablock(struct ath_softc *sc, int dowait)
2149 int i = MAX_RESET_ITERATIONS;
2151 ATH_PCU_LOCK_ASSERT(sc);
2153 if (sc->sc_inreset_cnt == 0) {
2162 pause("ath_reset_grablock", 1);
2168 * We always increment the refcounter, regardless
2169 * of whether we succeeded to get it in an exclusive
2172 sc->sc_inreset_cnt++;
2175 device_printf(sc->sc_dev,
2176 "%s: didn't finish after %d iterations\n",
2177 __func__, MAX_RESET_ITERATIONS);
2180 device_printf(sc->sc_dev,
2181 "%s: warning, recursive reset path!\n",
2186 #undef MAX_RESET_ITERATIONS
2189 * XXX TODO: write ath_reset_releaselock
2193 ath_stop(struct ifnet *ifp)
2195 struct ath_softc *sc = ifp->if_softc;
2198 ath_stop_locked(ifp);
2203 * Reset the hardware w/o losing operational state. This is
2204 * basically a more efficient way of doing ath_stop, ath_init,
2205 * followed by state transitions to the current 802.11
2206 * operational state. Used to recover from various errors and
2207 * to reset or reload hardware state.
2210 ath_reset(struct ifnet *ifp, ATH_RESET_TYPE reset_type)
2212 struct ath_softc *sc = ifp->if_softc;
2213 struct ieee80211com *ic = ifp->if_l2com;
2214 struct ath_hal *ah = sc->sc_ah;
2218 DPRINTF(sc, ATH_DEBUG_RESET, "%s: called\n", __func__);
2220 /* Ensure ATH_LOCK isn't held; ath_rx_proc can't be locked */
2221 ATH_PCU_UNLOCK_ASSERT(sc);
2222 ATH_UNLOCK_ASSERT(sc);
2224 /* Try to (stop any further TX/RX from occuring */
2225 taskqueue_block(sc->sc_tq);
2228 ath_hal_intrset(ah, 0); /* disable interrupts */
2229 ath_txrx_stop_locked(sc); /* Ensure TX/RX is stopped */
2230 if (ath_reset_grablock(sc, 1) == 0) {
2231 device_printf(sc->sc_dev, "%s: concurrent reset! Danger!\n",
2237 * Should now wait for pending TX/RX to complete
2238 * and block future ones from occuring. This needs to be
2239 * done before the TX queue is drained.
2241 ath_draintxq(sc, reset_type); /* stop xmit side */
2244 * Regardless of whether we're doing a no-loss flush or
2245 * not, stop the PCU and handle what's in the RX queue.
2246 * That way frames aren't dropped which shouldn't be.
2248 ath_stoprecv(sc, (reset_type != ATH_RESET_NOLOSS));
2251 ath_settkipmic(sc); /* configure TKIP MIC handling */
2252 /* NB: indicate channel change so we do a full reset */
2253 if (!ath_hal_reset(ah, sc->sc_opmode, ic->ic_curchan, AH_TRUE, &status))
2254 if_printf(ifp, "%s: unable to reset hardware; hal status %u\n",
2256 sc->sc_diversity = ath_hal_getdiversity(ah);
2258 /* Let DFS at it in case it's a DFS channel */
2259 ath_dfs_radar_enable(sc, ic->ic_curchan);
2261 /* Let spectral at in case spectral is enabled */
2262 ath_spectral_enable(sc, ic->ic_curchan);
2264 if (ath_startrecv(sc) != 0) /* restart recv */
2265 if_printf(ifp, "%s: unable to start recv logic\n", __func__);
2267 * We may be doing a reset in response to an ioctl
2268 * that changes the channel so update any state that
2269 * might change as a result.
2271 ath_chan_change(sc, ic->ic_curchan);
2272 if (sc->sc_beacons) { /* restart beacons */
2273 #ifdef IEEE80211_SUPPORT_TDMA
2275 ath_tdma_config(sc, NULL);
2278 ath_beacon_config(sc, NULL);
2282 * Release the reset lock and re-enable interrupts here.
2283 * If an interrupt was being processed in ath_intr(),
2284 * it would disable interrupts at this point. So we have
2285 * to atomically enable interrupts and decrement the
2286 * reset counter - this way ath_intr() doesn't end up
2287 * disabling interrupts without a corresponding enable
2288 * in the rest or channel change path.
2291 sc->sc_inreset_cnt--;
2292 /* XXX only do this if sc_inreset_cnt == 0? */
2293 ath_hal_intrset(ah, sc->sc_imask);
2297 * TX and RX can be started here. If it were started with
2298 * sc_inreset_cnt > 0, the TX and RX path would abort.
2299 * Thus if this is a nested call through the reset or
2300 * channel change code, TX completion will occur but
2301 * RX completion and ath_start / ath_tx_start will not
2305 /* Restart TX/RX as needed */
2308 /* Restart TX completion and pending TX */
2309 if (reset_type == ATH_RESET_NOLOSS) {
2311 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) {
2312 if (ATH_TXQ_SETUP(sc, i)) {
2313 ath_txq_restart_dma(sc, &sc->sc_txq[i]);
2314 ath_txq_sched(sc, &sc->sc_txq[i]);
2321 * This may have been set during an ath_start() call which
2322 * set this once it detected a concurrent TX was going on.
2325 IF_LOCK(&ifp->if_snd);
2326 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
2327 IF_UNLOCK(&ifp->if_snd);
2329 /* Handle any frames in the TX queue */
2331 * XXX should this be done by the caller, rather than
2334 ath_tx_kick(sc); /* restart xmit */
2339 ath_reset_vap(struct ieee80211vap *vap, u_long cmd)
2341 struct ieee80211com *ic = vap->iv_ic;
2342 struct ifnet *ifp = ic->ic_ifp;
2343 struct ath_softc *sc = ifp->if_softc;
2344 struct ath_hal *ah = sc->sc_ah;
2347 case IEEE80211_IOC_TXPOWER:
2349 * If per-packet TPC is enabled, then we have nothing
2350 * to do; otherwise we need to force the global limit.
2351 * All this can happen directly; no need to reset.
2353 if (!ath_hal_gettpc(ah))
2354 ath_hal_settxpowlimit(ah, ic->ic_txpowlimit);
2357 /* XXX? Full or NOLOSS? */
2358 return ath_reset(ifp, ATH_RESET_FULL);
2362 _ath_getbuf_locked(struct ath_softc *sc, ath_buf_type_t btype)
2366 ATH_TXBUF_LOCK_ASSERT(sc);
2368 if (btype == ATH_BUFTYPE_MGMT)
2369 bf = TAILQ_FIRST(&sc->sc_txbuf_mgmt);
2371 bf = TAILQ_FIRST(&sc->sc_txbuf);
2374 sc->sc_stats.ast_tx_getnobuf++;
2376 if (bf->bf_flags & ATH_BUF_BUSY) {
2377 sc->sc_stats.ast_tx_getbusybuf++;
2382 if (bf != NULL && (bf->bf_flags & ATH_BUF_BUSY) == 0) {
2383 if (btype == ATH_BUFTYPE_MGMT)
2384 TAILQ_REMOVE(&sc->sc_txbuf_mgmt, bf, bf_list);
2386 TAILQ_REMOVE(&sc->sc_txbuf, bf, bf_list);
2390 * This shuldn't happen; however just to be
2391 * safe print a warning and fudge the txbuf
2394 if (sc->sc_txbuf_cnt < 0) {
2395 device_printf(sc->sc_dev,
2396 "%s: sc_txbuf_cnt < 0?\n",
2398 sc->sc_txbuf_cnt = 0;
2405 /* XXX should check which list, mgmt or otherwise */
2406 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: %s\n", __func__,
2407 TAILQ_FIRST(&sc->sc_txbuf) == NULL ?
2408 "out of xmit buffers" : "xmit buffer busy");
2412 /* XXX TODO: should do this at buffer list initialisation */
2413 /* XXX (then, ensure the buffer has the right flag set) */
2414 if (btype == ATH_BUFTYPE_MGMT)
2415 bf->bf_flags |= ATH_BUF_MGMT;
2417 bf->bf_flags &= (~ATH_BUF_MGMT);
2419 /* Valid bf here; clear some basic fields */
2420 bf->bf_next = NULL; /* XXX just to be sure */
2421 bf->bf_last = NULL; /* XXX again, just to be sure */
2422 bf->bf_comp = NULL; /* XXX again, just to be sure */
2423 bzero(&bf->bf_state, sizeof(bf->bf_state));
2426 * Track the descriptor ID only if doing EDMA
2428 if (sc->sc_isedma) {
2429 bf->bf_descid = sc->sc_txbuf_descid;
2430 sc->sc_txbuf_descid++;
2437 * When retrying a software frame, buffers marked ATH_BUF_BUSY
2438 * can't be thrown back on the queue as they could still be
2439 * in use by the hardware.
2441 * This duplicates the buffer, or returns NULL.
2443 * The descriptor is also copied but the link pointers and
2444 * the DMA segments aren't copied; this frame should thus
2445 * be again passed through the descriptor setup/chain routines
2446 * so the link is correct.
2448 * The caller must free the buffer using ath_freebuf().
2450 * XXX TODO: this call shouldn't fail as it'll cause packet loss
2451 * XXX in the TX pathway when retries are needed.
2452 * XXX Figure out how to keep some buffers free, or factor the
2453 * XXX number of busy buffers into the xmit path (ath_start())
2454 * XXX so we don't over-commit.
2457 ath_buf_clone(struct ath_softc *sc, const struct ath_buf *bf)
2459 struct ath_buf *tbf;
2461 tbf = ath_getbuf(sc,
2462 (bf->bf_flags & ATH_BUF_MGMT) ?
2463 ATH_BUFTYPE_MGMT : ATH_BUFTYPE_NORMAL);
2465 return NULL; /* XXX failure? Why? */
2468 tbf->bf_next = NULL;
2469 tbf->bf_nseg = bf->bf_nseg;
2470 tbf->bf_flags = bf->bf_flags & ~ATH_BUF_BUSY;
2471 tbf->bf_status = bf->bf_status;
2472 tbf->bf_m = bf->bf_m;
2474 * XXX Copy the node reference, the caller is responsible
2475 * for deleting the node reference before it frees its
2478 * XXX It's done like this so we don't call the net80211
2479 * code whilst having active TX queue locks held.
2481 tbf->bf_node = bf->bf_node;
2482 /* will be setup by the chain/setup function */
2483 tbf->bf_lastds = NULL;
2484 /* for now, last == self */
2486 tbf->bf_comp = bf->bf_comp;
2488 /* NOTE: DMA segments will be setup by the setup/chain functions */
2490 /* The caller has to re-init the descriptor + links */
2493 memcpy(&tbf->bf_state, &bf->bf_state, sizeof(bf->bf_state));
2499 ath_getbuf(struct ath_softc *sc, ath_buf_type_t btype)
2504 bf = _ath_getbuf_locked(sc, btype);
2506 * If a mgmt buffer was requested but we're out of those,
2507 * try requesting a normal one.
2509 if (bf == NULL && btype == ATH_BUFTYPE_MGMT)
2510 bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL);
2511 ATH_TXBUF_UNLOCK(sc);
2513 struct ifnet *ifp = sc->sc_ifp;
2515 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: stop queue\n", __func__);
2516 sc->sc_stats.ast_tx_qstop++;
2517 IF_LOCK(&ifp->if_snd);
2518 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
2519 IF_UNLOCK(&ifp->if_snd);
2525 ath_start_queue(struct ifnet *ifp)
2527 struct ath_softc *sc = ifp->if_softc;
2529 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_start_queue: start");
2531 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_start_queue: finished");
2535 ath_start_task(void *arg, int npending)
2537 struct ath_softc *sc = (struct ath_softc *) arg;
2538 struct ifnet *ifp = sc->sc_ifp;
2540 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_start_task: start");
2542 /* XXX is it ok to hold the ATH_LOCK here? */
2544 if (sc->sc_inreset_cnt > 0) {
2545 device_printf(sc->sc_dev,
2546 "%s: sc_inreset_cnt > 0; bailing\n", __func__);
2548 IF_LOCK(&ifp->if_snd);
2549 sc->sc_stats.ast_tx_qstop++;
2550 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
2551 IF_UNLOCK(&ifp->if_snd);
2552 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_start_task: OACTIVE, finish");
2555 sc->sc_txstart_cnt++;
2559 ath_start(sc->sc_ifp);
2563 sc->sc_txstart_cnt--;
2565 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_start_task: finished");
2569 ath_start(struct ifnet *ifp)
2571 struct ath_softc *sc = ifp->if_softc;
2572 struct ieee80211_node *ni;
2574 struct mbuf *m, *next;
2578 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid)
2581 ATH_TX_LOCK_ASSERT(sc);
2583 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_start: called");
2587 if (sc->sc_txbuf_cnt <= sc->sc_txq_data_minfree) {
2588 /* XXX increment counter? */
2589 ATH_TXBUF_UNLOCK(sc);
2590 IF_LOCK(&ifp->if_snd);
2591 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
2592 IF_UNLOCK(&ifp->if_snd);
2595 ATH_TXBUF_UNLOCK(sc);
2598 * Grab a TX buffer and associated resources.
2600 bf = ath_getbuf(sc, ATH_BUFTYPE_NORMAL);
2604 IFQ_DEQUEUE(&ifp->if_snd, m);
2607 ath_returnbuf_head(sc, bf);
2608 ATH_TXBUF_UNLOCK(sc);
2611 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
2614 * Check for fragmentation. If this frame
2615 * has been broken up verify we have enough
2616 * buffers to send all the fragments so all
2620 if ((m->m_flags & M_FRAG) &&
2621 !ath_txfrag_setup(sc, &frags, m, ni)) {
2622 DPRINTF(sc, ATH_DEBUG_XMIT,
2623 "%s: out of txfrag buffers\n", __func__);
2624 sc->sc_stats.ast_tx_nofrag++;
2632 * Pass the frame to the h/w for transmission.
2633 * Fragmented frames have each frag chained together
2634 * with m_nextpkt. We know there are sufficient ath_buf's
2635 * to send all the frags because of work done by
2636 * ath_txfrag_setup. We leave m_nextpkt set while
2637 * calling ath_tx_start so it can use it to extend the
2638 * the tx duration to cover the subsequent frag and
2639 * so it can reclaim all the mbufs in case of an error;
2640 * ath_tx_start clears m_nextpkt once it commits to
2641 * handing the frame to the hardware.
2643 next = m->m_nextpkt;
2644 if (ath_tx_start(sc, ni, bf, m)) {
2651 ath_returnbuf_head(sc, bf);
2652 ath_txfrag_cleanup(sc, &frags, ni);
2653 ATH_TXBUF_UNLOCK(sc);
2655 * XXX todo, free the node outside of
2656 * the TX lock context!
2659 ieee80211_free_node(ni);
2664 * Check here if the node is in power save state.
2666 ath_tx_update_tim(sc, ni, 1);
2670 * Beware of state changing between frags.
2671 * XXX check sta power-save state?
2673 if (ni->ni_vap->iv_state != IEEE80211_S_RUN) {
2674 DPRINTF(sc, ATH_DEBUG_XMIT,
2675 "%s: flush fragmented packet, state %s\n",
2677 ieee80211_state_name[ni->ni_vap->iv_state]);
2682 bf = TAILQ_FIRST(&frags);
2683 KASSERT(bf != NULL, ("no buf for txfrag"));
2684 TAILQ_REMOVE(&frags, bf, bf_list);
2688 sc->sc_wd_timer = 5;
2690 ATH_KTR(sc, ATH_KTR_TX, 1, "ath_start: finished; npkts=%d", npkts);
2693 ath_media_change(struct ifnet *ifp)
2695 int error = ieee80211_media_change(ifp);
2696 /* NB: only the fixed rate can change and that doesn't need a reset */
2697 return (error == ENETRESET ? 0 : error);
2701 * Block/unblock tx+rx processing while a key change is done.
2702 * We assume the caller serializes key management operations
2703 * so we only need to worry about synchronization with other
2704 * uses that originate in the driver.
2707 ath_key_update_begin(struct ieee80211vap *vap)
2709 struct ifnet *ifp = vap->iv_ic->ic_ifp;
2710 struct ath_softc *sc = ifp->if_softc;
2712 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__);
2713 taskqueue_block(sc->sc_tq);
2714 IF_LOCK(&ifp->if_snd); /* NB: doesn't block mgmt frames */
2718 ath_key_update_end(struct ieee80211vap *vap)
2720 struct ifnet *ifp = vap->iv_ic->ic_ifp;
2721 struct ath_softc *sc = ifp->if_softc;
2723 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__);
2724 IF_UNLOCK(&ifp->if_snd);
2725 taskqueue_unblock(sc->sc_tq);
2729 ath_update_promisc(struct ifnet *ifp)
2731 struct ath_softc *sc = ifp->if_softc;
2734 /* configure rx filter */
2735 rfilt = ath_calcrxfilter(sc);
2736 ath_hal_setrxfilter(sc->sc_ah, rfilt);
2738 DPRINTF(sc, ATH_DEBUG_MODE, "%s: RX filter 0x%x\n", __func__, rfilt);
2742 ath_update_mcast(struct ifnet *ifp)
2744 struct ath_softc *sc = ifp->if_softc;
2747 /* calculate and install multicast filter */
2748 if ((ifp->if_flags & IFF_ALLMULTI) == 0) {
2749 struct ifmultiaddr *ifma;
2751 * Merge multicast addresses to form the hardware filter.
2753 mfilt[0] = mfilt[1] = 0;
2754 if_maddr_rlock(ifp); /* XXX need some fiddling to remove? */
2755 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
2760 /* calculate XOR of eight 6bit values */
2761 dl = LLADDR((struct sockaddr_dl *) ifma->ifma_addr);
2762 val = LE_READ_4(dl + 0);
2763 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
2764 val = LE_READ_4(dl + 3);
2765 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
2767 mfilt[pos / 32] |= (1 << (pos % 32));
2769 if_maddr_runlock(ifp);
2771 mfilt[0] = mfilt[1] = ~0;
2772 ath_hal_setmcastfilter(sc->sc_ah, mfilt[0], mfilt[1]);
2773 DPRINTF(sc, ATH_DEBUG_MODE, "%s: MC filter %08x:%08x\n",
2774 __func__, mfilt[0], mfilt[1]);
2778 ath_mode_init(struct ath_softc *sc)
2780 struct ifnet *ifp = sc->sc_ifp;
2781 struct ath_hal *ah = sc->sc_ah;
2784 /* configure rx filter */
2785 rfilt = ath_calcrxfilter(sc);
2786 ath_hal_setrxfilter(ah, rfilt);
2788 /* configure operational mode */
2789 ath_hal_setopmode(ah);
2791 DPRINTF(sc, ATH_DEBUG_STATE | ATH_DEBUG_MODE,
2792 "%s: ah=%p, ifp=%p, if_addr=%p\n",
2796 (ifp == NULL) ? NULL : ifp->if_addr);
2798 /* handle any link-level address change */
2799 ath_hal_setmac(ah, IF_LLADDR(ifp));
2801 /* calculate and install multicast filter */
2802 ath_update_mcast(ifp);
2806 * Set the slot time based on the current setting.
2809 ath_setslottime(struct ath_softc *sc)
2811 struct ieee80211com *ic = sc->sc_ifp->if_l2com;
2812 struct ath_hal *ah = sc->sc_ah;
2815 if (IEEE80211_IS_CHAN_HALF(ic->ic_curchan))
2817 else if (IEEE80211_IS_CHAN_QUARTER(ic->ic_curchan))
2819 else if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan)) {
2820 /* honor short/long slot time only in 11g */
2821 /* XXX shouldn't honor on pure g or turbo g channel */
2822 if (ic->ic_flags & IEEE80211_F_SHSLOT)
2823 usec = HAL_SLOT_TIME_9;
2825 usec = HAL_SLOT_TIME_20;
2827 usec = HAL_SLOT_TIME_9;
2829 DPRINTF(sc, ATH_DEBUG_RESET,
2830 "%s: chan %u MHz flags 0x%x %s slot, %u usec\n",
2831 __func__, ic->ic_curchan->ic_freq, ic->ic_curchan->ic_flags,
2832 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", usec);
2834 ath_hal_setslottime(ah, usec);
2835 sc->sc_updateslot = OK;
2839 * Callback from the 802.11 layer to update the
2840 * slot time based on the current setting.
2843 ath_updateslot(struct ifnet *ifp)
2845 struct ath_softc *sc = ifp->if_softc;
2846 struct ieee80211com *ic = ifp->if_l2com;
2849 * When not coordinating the BSS, change the hardware
2850 * immediately. For other operation we defer the change
2851 * until beacon updates have propagated to the stations.
2853 if (ic->ic_opmode == IEEE80211_M_HOSTAP ||
2854 ic->ic_opmode == IEEE80211_M_MBSS)
2855 sc->sc_updateslot = UPDATE;
2857 ath_setslottime(sc);
2861 * Append the contents of src to dst; both queues
2862 * are assumed to be locked.
2865 ath_txqmove(struct ath_txq *dst, struct ath_txq *src)
2868 TAILQ_CONCAT(&dst->axq_q, &src->axq_q, bf_list);
2869 dst->axq_link = src->axq_link;
2870 src->axq_link = NULL;
2871 dst->axq_depth += src->axq_depth;
2872 dst->axq_aggr_depth += src->axq_aggr_depth;
2874 src->axq_aggr_depth = 0;
2878 * Reset the hardware, with no loss.
2880 * This can't be used for a general case reset.
2883 ath_reset_proc(void *arg, int pending)
2885 struct ath_softc *sc = arg;
2886 struct ifnet *ifp = sc->sc_ifp;
2889 if_printf(ifp, "%s: resetting\n", __func__);
2891 ath_reset(ifp, ATH_RESET_NOLOSS);
2895 * Reset the hardware after detecting beacons have stopped.
2898 ath_bstuck_proc(void *arg, int pending)
2900 struct ath_softc *sc = arg;
2901 struct ifnet *ifp = sc->sc_ifp;
2904 if (ath_hal_gethangstate(sc->sc_ah, 0xff, &hangs) && hangs != 0)
2905 if_printf(ifp, "bb hang detected (0x%x)\n", hangs);
2907 if_printf(ifp, "stuck beacon; resetting (bmiss count %u)\n",
2909 sc->sc_stats.ast_bstuck++;
2911 * This assumes that there's no simultaneous channel mode change
2914 ath_reset(ifp, ATH_RESET_NOLOSS);
2918 ath_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
2920 bus_addr_t *paddr = (bus_addr_t*) arg;
2921 KASSERT(error == 0, ("error %u on bus_dma callback", error));
2922 *paddr = segs->ds_addr;
2926 * Allocate the descriptors and appropriate DMA tag/setup.
2928 * For some situations (eg EDMA TX completion), there isn't a requirement
2929 * for the ath_buf entries to be allocated.
2932 ath_descdma_alloc_desc(struct ath_softc *sc,
2933 struct ath_descdma *dd, ath_bufhead *head,
2934 const char *name, int ds_size, int ndesc)
2936 #define DS2PHYS(_dd, _ds) \
2937 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
2938 #define ATH_DESC_4KB_BOUND_CHECK(_daddr, _len) \
2939 ((((u_int32_t)(_daddr) & 0xFFF) > (0x1000 - (_len))) ? 1 : 0)
2940 struct ifnet *ifp = sc->sc_ifp;
2943 dd->dd_descsize = ds_size;
2945 DPRINTF(sc, ATH_DEBUG_RESET,
2946 "%s: %s DMA: %u desc, %d bytes per descriptor\n",
2947 __func__, name, ndesc, dd->dd_descsize);
2950 dd->dd_desc_len = dd->dd_descsize * ndesc;
2953 * Merlin work-around:
2954 * Descriptors that cross the 4KB boundary can't be used.
2955 * Assume one skipped descriptor per 4KB page.
2957 if (! ath_hal_split4ktrans(sc->sc_ah)) {
2958 int numpages = dd->dd_desc_len / 4096;
2959 dd->dd_desc_len += ds_size * numpages;
2963 * Setup DMA descriptor area.
2965 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), /* parent */
2966 PAGE_SIZE, 0, /* alignment, bounds */
2967 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
2968 BUS_SPACE_MAXADDR, /* highaddr */
2969 NULL, NULL, /* filter, filterarg */
2970 dd->dd_desc_len, /* maxsize */
2972 dd->dd_desc_len, /* maxsegsize */
2973 BUS_DMA_ALLOCNOW, /* flags */
2974 NULL, /* lockfunc */
2978 if_printf(ifp, "cannot allocate %s DMA tag\n", dd->dd_name);
2982 /* allocate descriptors */
2983 error = bus_dmamem_alloc(dd->dd_dmat, (void**) &dd->dd_desc,
2984 BUS_DMA_NOWAIT | BUS_DMA_COHERENT,
2987 if_printf(ifp, "unable to alloc memory for %u %s descriptors, "
2988 "error %u\n", ndesc, dd->dd_name, error);
2992 error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap,
2993 dd->dd_desc, dd->dd_desc_len,
2994 ath_load_cb, &dd->dd_desc_paddr,
2997 if_printf(ifp, "unable to map %s descriptors, error %u\n",
2998 dd->dd_name, error);
3002 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA map: %p (%lu) -> %p (%lu)\n",
3003 __func__, dd->dd_name, (uint8_t *) dd->dd_desc,
3004 (u_long) dd->dd_desc_len, (caddr_t) dd->dd_desc_paddr,
3005 /*XXX*/ (u_long) dd->dd_desc_len);
3010 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
3012 bus_dma_tag_destroy(dd->dd_dmat);
3013 memset(dd, 0, sizeof(*dd));
3016 #undef ATH_DESC_4KB_BOUND_CHECK
3020 ath_descdma_setup(struct ath_softc *sc,
3021 struct ath_descdma *dd, ath_bufhead *head,
3022 const char *name, int ds_size, int nbuf, int ndesc)
3024 #define DS2PHYS(_dd, _ds) \
3025 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
3026 #define ATH_DESC_4KB_BOUND_CHECK(_daddr, _len) \
3027 ((((u_int32_t)(_daddr) & 0xFFF) > (0x1000 - (_len))) ? 1 : 0)
3028 struct ifnet *ifp = sc->sc_ifp;
3031 int i, bsize, error;
3033 /* Allocate descriptors */
3034 error = ath_descdma_alloc_desc(sc, dd, head, name, ds_size,
3037 /* Assume any errors during allocation were dealt with */
3042 ds = (uint8_t *) dd->dd_desc;
3044 /* allocate rx buffers */
3045 bsize = sizeof(struct ath_buf) * nbuf;
3046 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO);
3048 if_printf(ifp, "malloc of %s buffers failed, size %u\n",
3049 dd->dd_name, bsize);
3055 for (i = 0; i < nbuf; i++, bf++, ds += (ndesc * dd->dd_descsize)) {
3056 bf->bf_desc = (struct ath_desc *) ds;
3057 bf->bf_daddr = DS2PHYS(dd, ds);
3058 if (! ath_hal_split4ktrans(sc->sc_ah)) {
3060 * Merlin WAR: Skip descriptor addresses which
3061 * cause 4KB boundary crossing along any point
3062 * in the descriptor.
3064 if (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr,
3066 /* Start at the next page */
3067 ds += 0x1000 - (bf->bf_daddr & 0xFFF);
3068 bf->bf_desc = (struct ath_desc *) ds;
3069 bf->bf_daddr = DS2PHYS(dd, ds);
3072 error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT,
3075 if_printf(ifp, "unable to create dmamap for %s "
3076 "buffer %u, error %u\n", dd->dd_name, i, error);
3077 ath_descdma_cleanup(sc, dd, head);
3080 bf->bf_lastds = bf->bf_desc; /* Just an initial value */
3081 TAILQ_INSERT_TAIL(head, bf, bf_list);
3085 * XXX TODO: ensure that ds doesn't overflow the descriptor
3086 * allocation otherwise weird stuff will occur and crash your
3090 /* XXX this should likely just call ath_descdma_cleanup() */
3092 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap);
3093 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
3094 bus_dma_tag_destroy(dd->dd_dmat);
3095 memset(dd, 0, sizeof(*dd));
3098 #undef ATH_DESC_4KB_BOUND_CHECK
3102 * Allocate ath_buf entries but no descriptor contents.
3104 * This is for RX EDMA where the descriptors are the header part of
3108 ath_descdma_setup_rx_edma(struct ath_softc *sc,
3109 struct ath_descdma *dd, ath_bufhead *head,
3110 const char *name, int nbuf, int rx_status_len)
3112 struct ifnet *ifp = sc->sc_ifp;
3114 int i, bsize, error;
3116 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA: %u buffers\n",
3117 __func__, name, nbuf);
3121 * This is (mostly) purely for show. We're not allocating any actual
3122 * descriptors here as EDMA RX has the descriptor be part
3125 * However, dd_desc_len is used by ath_descdma_free() to determine
3126 * whether we have already freed this DMA mapping.
3128 dd->dd_desc_len = rx_status_len * nbuf;
3129 dd->dd_descsize = rx_status_len;
3131 /* allocate rx buffers */
3132 bsize = sizeof(struct ath_buf) * nbuf;
3133 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO);
3135 if_printf(ifp, "malloc of %s buffers failed, size %u\n",
3136 dd->dd_name, bsize);
3143 for (i = 0; i < nbuf; i++, bf++) {
3146 bf->bf_lastds = NULL; /* Just an initial value */
3148 error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT,
3151 if_printf(ifp, "unable to create dmamap for %s "
3152 "buffer %u, error %u\n", dd->dd_name, i, error);
3153 ath_descdma_cleanup(sc, dd, head);
3156 TAILQ_INSERT_TAIL(head, bf, bf_list);
3160 memset(dd, 0, sizeof(*dd));
3165 ath_descdma_cleanup(struct ath_softc *sc,
3166 struct ath_descdma *dd, ath_bufhead *head)
3169 struct ieee80211_node *ni;
3171 if (dd->dd_dmamap != 0) {
3172 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap);
3173 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
3174 bus_dma_tag_destroy(dd->dd_dmat);
3178 TAILQ_FOREACH(bf, head, bf_list) {
3183 if (bf->bf_dmamap != NULL) {
3184 bus_dmamap_destroy(sc->sc_dmat, bf->bf_dmamap);
3185 bf->bf_dmamap = NULL;
3191 * Reclaim node reference.
3193 ieee80211_free_node(ni);
3201 if (dd->dd_bufptr != NULL)
3202 free(dd->dd_bufptr, M_ATHDEV);
3203 memset(dd, 0, sizeof(*dd));
3207 ath_desc_alloc(struct ath_softc *sc)
3211 error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf,
3212 "tx", sc->sc_tx_desclen, ath_txbuf, ATH_TXDESC);
3216 sc->sc_txbuf_cnt = ath_txbuf;
3218 error = ath_descdma_setup(sc, &sc->sc_txdma_mgmt, &sc->sc_txbuf_mgmt,
3219 "tx_mgmt", sc->sc_tx_desclen, ath_txbuf_mgmt,
3222 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf);
3227 * XXX mark txbuf_mgmt frames with ATH_BUF_MGMT, so the
3228 * flag doesn't have to be set in ath_getbuf_locked().
3231 error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf,
3232 "beacon", sc->sc_tx_desclen, ATH_BCBUF, 1);
3234 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf);
3235 ath_descdma_cleanup(sc, &sc->sc_txdma_mgmt,
3236 &sc->sc_txbuf_mgmt);
3243 ath_desc_free(struct ath_softc *sc)
3246 if (sc->sc_bdma.dd_desc_len != 0)
3247 ath_descdma_cleanup(sc, &sc->sc_bdma, &sc->sc_bbuf);
3248 if (sc->sc_txdma.dd_desc_len != 0)
3249 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf);
3250 if (sc->sc_txdma_mgmt.dd_desc_len != 0)
3251 ath_descdma_cleanup(sc, &sc->sc_txdma_mgmt,
3252 &sc->sc_txbuf_mgmt);
3255 static struct ieee80211_node *
3256 ath_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN])
3258 struct ieee80211com *ic = vap->iv_ic;
3259 struct ath_softc *sc = ic->ic_ifp->if_softc;
3260 const size_t space = sizeof(struct ath_node) + sc->sc_rc->arc_space;
3261 struct ath_node *an;
3263 an = malloc(space, M_80211_NODE, M_NOWAIT|M_ZERO);
3268 ath_rate_node_init(sc, an);
3270 /* Setup the mutex - there's no associd yet so set the name to NULL */
3271 snprintf(an->an_name, sizeof(an->an_name), "%s: node %p",
3272 device_get_nameunit(sc->sc_dev), an);
3273 mtx_init(&an->an_mtx, an->an_name, NULL, MTX_DEF);
3275 /* XXX setup ath_tid */
3276 ath_tx_tid_init(sc, an);
3278 DPRINTF(sc, ATH_DEBUG_NODE, "%s: an %p\n", __func__, an);
3279 return &an->an_node;
3283 ath_node_cleanup(struct ieee80211_node *ni)
3285 struct ieee80211com *ic = ni->ni_ic;
3286 struct ath_softc *sc = ic->ic_ifp->if_softc;
3288 /* Cleanup ath_tid, free unused bufs, unlink bufs in TXQ */
3289 ath_tx_node_flush(sc, ATH_NODE(ni));
3290 ath_rate_node_cleanup(sc, ATH_NODE(ni));
3291 sc->sc_node_cleanup(ni);
3295 ath_node_free(struct ieee80211_node *ni)
3297 struct ieee80211com *ic = ni->ni_ic;
3298 struct ath_softc *sc = ic->ic_ifp->if_softc;
3300 DPRINTF(sc, ATH_DEBUG_NODE, "%s: ni %p\n", __func__, ni);
3301 mtx_destroy(&ATH_NODE(ni)->an_mtx);
3302 sc->sc_node_free(ni);
3306 ath_node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
3308 struct ieee80211com *ic = ni->ni_ic;
3309 struct ath_softc *sc = ic->ic_ifp->if_softc;
3310 struct ath_hal *ah = sc->sc_ah;
3312 *rssi = ic->ic_node_getrssi(ni);
3313 if (ni->ni_chan != IEEE80211_CHAN_ANYC)
3314 *noise = ath_hal_getchannoise(ah, ni->ni_chan);
3316 *noise = -95; /* nominally correct */
3320 * Set the default antenna.
3323 ath_setdefantenna(struct ath_softc *sc, u_int antenna)
3325 struct ath_hal *ah = sc->sc_ah;
3327 /* XXX block beacon interrupts */
3328 ath_hal_setdefantenna(ah, antenna);
3329 if (sc->sc_defant != antenna)
3330 sc->sc_stats.ast_ant_defswitch++;
3331 sc->sc_defant = antenna;
3332 sc->sc_rxotherant = 0;
3336 ath_txq_init(struct ath_softc *sc, struct ath_txq *txq, int qnum)
3338 txq->axq_qnum = qnum;
3341 txq->axq_aggr_depth = 0;
3342 txq->axq_intrcnt = 0;
3343 txq->axq_link = NULL;
3344 txq->axq_softc = sc;
3345 TAILQ_INIT(&txq->axq_q);
3346 TAILQ_INIT(&txq->axq_tidq);
3350 * Setup a h/w transmit queue.
3352 static struct ath_txq *
3353 ath_txq_setup(struct ath_softc *sc, int qtype, int subtype)
3355 #define N(a) (sizeof(a)/sizeof(a[0]))
3356 struct ath_hal *ah = sc->sc_ah;
3360 memset(&qi, 0, sizeof(qi));
3361 qi.tqi_subtype = subtype;
3362 qi.tqi_aifs = HAL_TXQ_USEDEFAULT;
3363 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT;
3364 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT;
3366 * Enable interrupts only for EOL and DESC conditions.
3367 * We mark tx descriptors to receive a DESC interrupt
3368 * when a tx queue gets deep; otherwise waiting for the
3369 * EOL to reap descriptors. Note that this is done to
3370 * reduce interrupt load and this only defers reaping
3371 * descriptors, never transmitting frames. Aside from
3372 * reducing interrupts this also permits more concurrency.
3373 * The only potential downside is if the tx queue backs
3374 * up in which case the top half of the kernel may backup
3375 * due to a lack of tx descriptors.
3377 qi.tqi_qflags = HAL_TXQ_TXEOLINT_ENABLE | HAL_TXQ_TXDESCINT_ENABLE;
3378 qnum = ath_hal_setuptxqueue(ah, qtype, &qi);
3381 * NB: don't print a message, this happens
3382 * normally on parts with too few tx queues
3386 if (qnum >= N(sc->sc_txq)) {
3387 device_printf(sc->sc_dev,
3388 "hal qnum %u out of range, max %zu!\n",
3389 qnum, N(sc->sc_txq));
3390 ath_hal_releasetxqueue(ah, qnum);
3393 if (!ATH_TXQ_SETUP(sc, qnum)) {
3394 ath_txq_init(sc, &sc->sc_txq[qnum], qnum);
3395 sc->sc_txqsetup |= 1<<qnum;
3397 return &sc->sc_txq[qnum];
3402 * Setup a hardware data transmit queue for the specified
3403 * access control. The hal may not support all requested
3404 * queues in which case it will return a reference to a
3405 * previously setup queue. We record the mapping from ac's
3406 * to h/w queues for use by ath_tx_start and also track
3407 * the set of h/w queues being used to optimize work in the
3408 * transmit interrupt handler and related routines.
3411 ath_tx_setup(struct ath_softc *sc, int ac, int haltype)
3413 #define N(a) (sizeof(a)/sizeof(a[0]))
3414 struct ath_txq *txq;
3416 if (ac >= N(sc->sc_ac2q)) {
3417 device_printf(sc->sc_dev, "AC %u out of range, max %zu!\n",
3418 ac, N(sc->sc_ac2q));
3421 txq = ath_txq_setup(sc, HAL_TX_QUEUE_DATA, haltype);
3424 sc->sc_ac2q[ac] = txq;
3432 * Update WME parameters for a transmit queue.
3435 ath_txq_update(struct ath_softc *sc, int ac)
3437 #define ATH_EXPONENT_TO_VALUE(v) ((1<<v)-1)
3438 #define ATH_TXOP_TO_US(v) (v<<5)
3439 struct ifnet *ifp = sc->sc_ifp;
3440 struct ieee80211com *ic = ifp->if_l2com;
3441 struct ath_txq *txq = sc->sc_ac2q[ac];
3442 struct wmeParams *wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac];
3443 struct ath_hal *ah = sc->sc_ah;
3446 ath_hal_gettxqueueprops(ah, txq->axq_qnum, &qi);
3447 #ifdef IEEE80211_SUPPORT_TDMA
3450 * AIFS is zero so there's no pre-transmit wait. The
3451 * burst time defines the slot duration and is configured
3452 * through net80211. The QCU is setup to not do post-xmit
3453 * back off, lockout all lower-priority QCU's, and fire
3454 * off the DMA beacon alert timer which is setup based
3455 * on the slot configuration.
3457 qi.tqi_qflags = HAL_TXQ_TXOKINT_ENABLE
3458 | HAL_TXQ_TXERRINT_ENABLE
3459 | HAL_TXQ_TXURNINT_ENABLE
3460 | HAL_TXQ_TXEOLINT_ENABLE
3462 | HAL_TXQ_BACKOFF_DISABLE
3463 | HAL_TXQ_ARB_LOCKOUT_GLOBAL
3467 qi.tqi_readyTime = sc->sc_tdmaslotlen;
3468 qi.tqi_burstTime = qi.tqi_readyTime;
3472 * XXX shouldn't this just use the default flags
3473 * used in the previous queue setup?
3475 qi.tqi_qflags = HAL_TXQ_TXOKINT_ENABLE
3476 | HAL_TXQ_TXERRINT_ENABLE
3477 | HAL_TXQ_TXDESCINT_ENABLE
3478 | HAL_TXQ_TXURNINT_ENABLE
3479 | HAL_TXQ_TXEOLINT_ENABLE
3481 qi.tqi_aifs = wmep->wmep_aifsn;
3482 qi.tqi_cwmin = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin);
3483 qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax);
3484 qi.tqi_readyTime = 0;
3485 qi.tqi_burstTime = ATH_TXOP_TO_US(wmep->wmep_txopLimit);
3486 #ifdef IEEE80211_SUPPORT_TDMA
3490 DPRINTF(sc, ATH_DEBUG_RESET,
3491 "%s: Q%u qflags 0x%x aifs %u cwmin %u cwmax %u burstTime %u\n",
3492 __func__, txq->axq_qnum, qi.tqi_qflags,
3493 qi.tqi_aifs, qi.tqi_cwmin, qi.tqi_cwmax, qi.tqi_burstTime);
3495 if (!ath_hal_settxqueueprops(ah, txq->axq_qnum, &qi)) {
3496 if_printf(ifp, "unable to update hardware queue "
3497 "parameters for %s traffic!\n",
3498 ieee80211_wme_acnames[ac]);
3501 ath_hal_resettxqueue(ah, txq->axq_qnum); /* push to h/w */
3504 #undef ATH_TXOP_TO_US
3505 #undef ATH_EXPONENT_TO_VALUE
3509 * Callback from the 802.11 layer to update WME parameters.
3512 ath_wme_update(struct ieee80211com *ic)
3514 struct ath_softc *sc = ic->ic_ifp->if_softc;
3516 return !ath_txq_update(sc, WME_AC_BE) ||
3517 !ath_txq_update(sc, WME_AC_BK) ||
3518 !ath_txq_update(sc, WME_AC_VI) ||
3519 !ath_txq_update(sc, WME_AC_VO) ? EIO : 0;
3523 * Reclaim resources for a setup queue.
3526 ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq)
3529 ath_hal_releasetxqueue(sc->sc_ah, txq->axq_qnum);
3530 sc->sc_txqsetup &= ~(1<<txq->axq_qnum);
3534 * Reclaim all tx queue resources.
3537 ath_tx_cleanup(struct ath_softc *sc)
3541 ATH_TXBUF_LOCK_DESTROY(sc);
3542 for (i = 0; i < HAL_NUM_TX_QUEUES; i++)
3543 if (ATH_TXQ_SETUP(sc, i))
3544 ath_tx_cleanupq(sc, &sc->sc_txq[i]);
3548 * Return h/w rate index for an IEEE rate (w/o basic rate bit)
3549 * using the current rates in sc_rixmap.
3552 ath_tx_findrix(const struct ath_softc *sc, uint8_t rate)
3554 int rix = sc->sc_rixmap[rate];
3555 /* NB: return lowest rix for invalid rate */
3556 return (rix == 0xff ? 0 : rix);
3560 ath_tx_update_stats(struct ath_softc *sc, struct ath_tx_status *ts,
3563 struct ieee80211_node *ni = bf->bf_node;
3564 struct ifnet *ifp = sc->sc_ifp;
3565 struct ieee80211com *ic = ifp->if_l2com;
3568 if (ts->ts_status == 0) {
3569 u_int8_t txant = ts->ts_antenna;
3570 sc->sc_stats.ast_ant_tx[txant]++;
3571 sc->sc_ant_tx[txant]++;
3572 if (ts->ts_finaltsi != 0)
3573 sc->sc_stats.ast_tx_altrate++;
3574 pri = M_WME_GETAC(bf->bf_m);
3575 if (pri >= WME_AC_VO)
3576 ic->ic_wme.wme_hipri_traffic++;
3577 if ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)
3578 ni->ni_inact = ni->ni_inact_reload;
3580 if (ts->ts_status & HAL_TXERR_XRETRY)
3581 sc->sc_stats.ast_tx_xretries++;
3582 if (ts->ts_status & HAL_TXERR_FIFO)
3583 sc->sc_stats.ast_tx_fifoerr++;
3584 if (ts->ts_status & HAL_TXERR_FILT)
3585 sc->sc_stats.ast_tx_filtered++;
3586 if (ts->ts_status & HAL_TXERR_XTXOP)
3587 sc->sc_stats.ast_tx_xtxop++;
3588 if (ts->ts_status & HAL_TXERR_TIMER_EXPIRED)
3589 sc->sc_stats.ast_tx_timerexpired++;
3591 if (bf->bf_m->m_flags & M_FF)
3592 sc->sc_stats.ast_ff_txerr++;
3594 /* XXX when is this valid? */
3595 if (ts->ts_flags & HAL_TX_DESC_CFG_ERR)
3596 sc->sc_stats.ast_tx_desccfgerr++;
3598 * This can be valid for successful frame transmission!
3599 * If there's a TX FIFO underrun during aggregate transmission,
3600 * the MAC will pad the rest of the aggregate with delimiters.
3601 * If a BA is returned, the frame is marked as "OK" and it's up
3602 * to the TX completion code to notice which frames weren't
3603 * successfully transmitted.
3605 if (ts->ts_flags & HAL_TX_DATA_UNDERRUN)
3606 sc->sc_stats.ast_tx_data_underrun++;
3607 if (ts->ts_flags & HAL_TX_DELIM_UNDERRUN)
3608 sc->sc_stats.ast_tx_delim_underrun++;
3610 sr = ts->ts_shortretry;
3611 lr = ts->ts_longretry;
3612 sc->sc_stats.ast_tx_shortretry += sr;
3613 sc->sc_stats.ast_tx_longretry += lr;
3618 * The default completion. If fail is 1, this means
3619 * "please don't retry the frame, and just return -1 status
3620 * to the net80211 stack.
3623 ath_tx_default_comp(struct ath_softc *sc, struct ath_buf *bf, int fail)
3625 struct ath_tx_status *ts = &bf->bf_status.ds_txstat;
3631 st = ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0) ?
3632 ts->ts_status : HAL_TXERR_XRETRY;
3635 if (bf->bf_state.bfs_dobaw)
3636 device_printf(sc->sc_dev,
3637 "%s: bf %p: seqno %d: dobaw should've been cleared!\n",
3640 SEQNO(bf->bf_state.bfs_seqno));
3642 if (bf->bf_next != NULL)
3643 device_printf(sc->sc_dev,
3644 "%s: bf %p: seqno %d: bf_next not NULL!\n",
3647 SEQNO(bf->bf_state.bfs_seqno));
3650 * Check if the node software queue is empty; if so
3651 * then clear the TIM.
3653 * This needs to be done before the buffer is freed as
3654 * otherwise the node reference will have been released
3655 * and the node may not actually exist any longer.
3657 * XXX I don't like this belonging here, but it's cleaner
3658 * to do it here right now then all the other places
3659 * where ath_tx_default_comp() is called.
3661 * XXX TODO: during drain, ensure that the callback is
3662 * being called so we get a chance to update the TIM.
3665 ath_tx_update_tim(sc, bf->bf_node, 0);
3668 * Do any tx complete callback. Note this must
3669 * be done before releasing the node reference.
3670 * This will free the mbuf, release the net80211
3671 * node and recycle the ath_buf.
3673 ath_tx_freebuf(sc, bf, st);
3677 * Update rate control with the given completion status.
3680 ath_tx_update_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni,
3681 struct ath_rc_series *rc, struct ath_tx_status *ts, int frmlen,
3682 int nframes, int nbad)
3684 struct ath_node *an;
3686 /* Only for unicast frames */
3691 ATH_NODE_UNLOCK_ASSERT(an);
3693 if ((ts->ts_status & HAL_TXERR_FILT) == 0) {
3695 ath_rate_tx_complete(sc, an, rc, ts, frmlen, nframes, nbad);
3696 ATH_NODE_UNLOCK(an);
3701 * Update the busy status of the last frame on the free list.
3702 * When doing TDMA, the busy flag tracks whether the hardware
3703 * currently points to this buffer or not, and thus gated DMA
3704 * may restart by re-reading the last descriptor in this
3707 * This should be called in the completion function once one
3708 * of the buffers has been used.
3711 ath_tx_update_busy(struct ath_softc *sc)
3713 struct ath_buf *last;
3716 * Since the last frame may still be marked
3717 * as ATH_BUF_BUSY, unmark it here before
3718 * finishing the frame processing.
3719 * Since we've completed a frame (aggregate
3720 * or otherwise), the hardware has moved on
3721 * and is no longer referencing the previous
3724 ATH_TXBUF_LOCK_ASSERT(sc);
3725 last = TAILQ_LAST(&sc->sc_txbuf_mgmt, ath_bufhead_s);
3727 last->bf_flags &= ~ATH_BUF_BUSY;
3728 last = TAILQ_LAST(&sc->sc_txbuf, ath_bufhead_s);
3730 last->bf_flags &= ~ATH_BUF_BUSY;
3734 * Process the completion of the given buffer.
3736 * This calls the rate control update and then the buffer completion.
3737 * This will either free the buffer or requeue it. In any case, the
3738 * bf pointer should be treated as invalid after this function is called.
3741 ath_tx_process_buf_completion(struct ath_softc *sc, struct ath_txq *txq,
3742 struct ath_tx_status *ts, struct ath_buf *bf)
3744 struct ieee80211_node *ni = bf->bf_node;
3745 struct ath_node *an = NULL;
3747 ATH_TX_UNLOCK_ASSERT(sc);
3749 /* If unicast frame, update general statistics */
3752 /* update statistics */
3753 ath_tx_update_stats(sc, ts, bf);
3757 * Call the completion handler.
3758 * The completion handler is responsible for
3759 * calling the rate control code.
3761 * Frames with no completion handler get the
3762 * rate control code called here.
3764 if (bf->bf_comp == NULL) {
3765 if ((ts->ts_status & HAL_TXERR_FILT) == 0 &&
3766 (bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0) {
3768 * XXX assume this isn't an aggregate
3771 ath_tx_update_ratectrl(sc, ni,
3772 bf->bf_state.bfs_rc, ts,
3773 bf->bf_state.bfs_pktlen, 1,
3774 (ts->ts_status == 0 ? 0 : 1));
3776 ath_tx_default_comp(sc, bf, 0);
3778 bf->bf_comp(sc, bf, 0);
3784 * Process completed xmit descriptors from the specified queue.
3785 * Kick the packet scheduler if needed. This can occur from this
3789 ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq, int dosched)
3791 struct ath_hal *ah = sc->sc_ah;
3793 struct ath_desc *ds;
3794 struct ath_tx_status *ts;
3795 struct ieee80211_node *ni;
3796 #ifdef IEEE80211_SUPPORT_SUPERG
3797 struct ieee80211com *ic = sc->sc_ifp->if_l2com;
3798 #endif /* IEEE80211_SUPPORT_SUPERG */
3802 DPRINTF(sc, ATH_DEBUG_TX_PROC, "%s: tx queue %u head %p link %p\n",
3803 __func__, txq->axq_qnum,
3804 (caddr_t)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum),
3807 ATH_KTR(sc, ATH_KTR_TXCOMP, 4,
3808 "ath_tx_processq: txq=%u head %p link %p depth %p",
3810 (caddr_t)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum),
3817 txq->axq_intrcnt = 0; /* reset periodic desc intr count */
3818 bf = TAILQ_FIRST(&txq->axq_q);
3823 ds = bf->bf_lastds; /* XXX must be setup correctly! */
3824 ts = &bf->bf_status.ds_txstat;
3826 status = ath_hal_txprocdesc(ah, ds, ts);
3828 if (sc->sc_debug & ATH_DEBUG_XMIT_DESC)
3829 ath_printtxbuf(sc, bf, txq->axq_qnum, 0,
3831 else if ((sc->sc_debug & ATH_DEBUG_RESET) && (dosched == 0))
3832 ath_printtxbuf(sc, bf, txq->axq_qnum, 0,
3835 #ifdef ATH_DEBUG_ALQ
3836 if (if_ath_alq_checkdebug(&sc->sc_alq,
3837 ATH_ALQ_EDMA_TXSTATUS)) {
3838 if_ath_alq_post(&sc->sc_alq, ATH_ALQ_EDMA_TXSTATUS,
3839 sc->sc_tx_statuslen,
3844 if (status == HAL_EINPROGRESS) {
3845 ATH_KTR(sc, ATH_KTR_TXCOMP, 3,
3846 "ath_tx_processq: txq=%u, bf=%p ds=%p, HAL_EINPROGRESS",
3847 txq->axq_qnum, bf, ds);
3851 ATH_TXQ_REMOVE(txq, bf, bf_list);
3852 #ifdef IEEE80211_SUPPORT_TDMA
3853 if (txq->axq_depth > 0) {
3855 * More frames follow. Mark the buffer busy
3856 * so it's not re-used while the hardware may
3857 * still re-read the link field in the descriptor.
3859 * Use the last buffer in an aggregate as that
3860 * is where the hardware may be - intermediate
3861 * descriptors won't be "busy".
3863 bf->bf_last->bf_flags |= ATH_BUF_BUSY;
3866 if (txq->axq_depth == 0)
3868 txq->axq_link = NULL;
3869 if (bf->bf_state.bfs_aggr)
3870 txq->axq_aggr_depth--;
3874 ATH_KTR(sc, ATH_KTR_TXCOMP, 5,
3875 "ath_tx_processq: txq=%u, bf=%p, ds=%p, ni=%p, ts_status=0x%08x",
3876 txq->axq_qnum, bf, ds, ni, ts->ts_status);
3878 * If unicast frame was ack'd update RSSI,
3879 * including the last rx time used to
3880 * workaround phantom bmiss interrupts.
3882 if (ni != NULL && ts->ts_status == 0 &&
3883 ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) {
3885 sc->sc_stats.ast_tx_rssi = ts->ts_rssi;
3886 ATH_RSSI_LPF(sc->sc_halstats.ns_avgtxrssi,
3892 * Update statistics and call completion
3894 ath_tx_process_buf_completion(sc, txq, ts, bf);
3896 /* XXX at this point, bf and ni may be totally invalid */
3898 #ifdef IEEE80211_SUPPORT_SUPERG
3900 * Flush fast-frame staging queue when traffic slows.
3902 if (txq->axq_depth <= 1)
3903 ieee80211_ff_flush(ic, txq->axq_ac);
3906 /* Kick the software TXQ scheduler */
3909 ath_txq_sched(sc, txq);
3913 ATH_KTR(sc, ATH_KTR_TXCOMP, 1,
3914 "ath_tx_processq: txq=%u: done",
3920 #define TXQACTIVE(t, q) ( (t) & (1 << (q)))
3923 * Deferred processing of transmit interrupt; special-cased
3924 * for a single hardware transmit queue (e.g. 5210 and 5211).
3927 ath_tx_proc_q0(void *arg, int npending)
3929 struct ath_softc *sc = arg;
3930 struct ifnet *ifp = sc->sc_ifp;
3934 sc->sc_txproc_cnt++;
3935 txqs = sc->sc_txq_active;
3936 sc->sc_txq_active &= ~txqs;
3939 ATH_KTR(sc, ATH_KTR_TXCOMP, 1,
3940 "ath_tx_proc_q0: txqs=0x%08x", txqs);
3942 if (TXQACTIVE(txqs, 0) && ath_tx_processq(sc, &sc->sc_txq[0], 1))
3943 /* XXX why is lastrx updated in tx code? */
3944 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah);
3945 if (TXQACTIVE(txqs, sc->sc_cabq->axq_qnum))
3946 ath_tx_processq(sc, sc->sc_cabq, 1);
3947 IF_LOCK(&ifp->if_snd);
3948 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
3949 IF_UNLOCK(&ifp->if_snd);
3950 sc->sc_wd_timer = 0;
3953 ath_led_event(sc, sc->sc_txrix);
3956 sc->sc_txproc_cnt--;
3963 * Deferred processing of transmit interrupt; special-cased
3964 * for four hardware queues, 0-3 (e.g. 5212 w/ WME support).
3967 ath_tx_proc_q0123(void *arg, int npending)
3969 struct ath_softc *sc = arg;
3970 struct ifnet *ifp = sc->sc_ifp;
3975 sc->sc_txproc_cnt++;
3976 txqs = sc->sc_txq_active;
3977 sc->sc_txq_active &= ~txqs;
3980 ATH_KTR(sc, ATH_KTR_TXCOMP, 1,
3981 "ath_tx_proc_q0123: txqs=0x%08x", txqs);
3984 * Process each active queue.
3987 if (TXQACTIVE(txqs, 0))
3988 nacked += ath_tx_processq(sc, &sc->sc_txq[0], 1);
3989 if (TXQACTIVE(txqs, 1))
3990 nacked += ath_tx_processq(sc, &sc->sc_txq[1], 1);
3991 if (TXQACTIVE(txqs, 2))
3992 nacked += ath_tx_processq(sc, &sc->sc_txq[2], 1);
3993 if (TXQACTIVE(txqs, 3))
3994 nacked += ath_tx_processq(sc, &sc->sc_txq[3], 1);
3995 if (TXQACTIVE(txqs, sc->sc_cabq->axq_qnum))
3996 ath_tx_processq(sc, sc->sc_cabq, 1);
3998 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah);
4000 IF_LOCK(&ifp->if_snd);
4001 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
4002 IF_UNLOCK(&ifp->if_snd);
4003 sc->sc_wd_timer = 0;
4006 ath_led_event(sc, sc->sc_txrix);
4009 sc->sc_txproc_cnt--;
4016 * Deferred processing of transmit interrupt.
4019 ath_tx_proc(void *arg, int npending)
4021 struct ath_softc *sc = arg;
4022 struct ifnet *ifp = sc->sc_ifp;
4027 sc->sc_txproc_cnt++;
4028 txqs = sc->sc_txq_active;
4029 sc->sc_txq_active &= ~txqs;
4032 ATH_KTR(sc, ATH_KTR_TXCOMP, 1, "ath_tx_proc: txqs=0x%08x", txqs);
4035 * Process each active queue.
4038 for (i = 0; i < HAL_NUM_TX_QUEUES; i++)
4039 if (ATH_TXQ_SETUP(sc, i) && TXQACTIVE(txqs, i))
4040 nacked += ath_tx_processq(sc, &sc->sc_txq[i], 1);
4042 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah);
4044 /* XXX check this inside of IF_LOCK? */
4045 IF_LOCK(&ifp->if_snd);
4046 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
4047 IF_UNLOCK(&ifp->if_snd);
4048 sc->sc_wd_timer = 0;
4051 ath_led_event(sc, sc->sc_txrix);
4054 sc->sc_txproc_cnt--;
4062 * Deferred processing of TXQ rescheduling.
4065 ath_txq_sched_tasklet(void *arg, int npending)
4067 struct ath_softc *sc = arg;
4070 /* XXX is skipping ok? */
4073 if (sc->sc_inreset_cnt > 0) {
4074 device_printf(sc->sc_dev,
4075 "%s: sc_inreset_cnt > 0; skipping\n", __func__);
4080 sc->sc_txproc_cnt++;
4084 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) {
4085 if (ATH_TXQ_SETUP(sc, i)) {
4086 ath_txq_sched(sc, &sc->sc_txq[i]);
4092 sc->sc_txproc_cnt--;
4097 ath_returnbuf_tail(struct ath_softc *sc, struct ath_buf *bf)
4100 ATH_TXBUF_LOCK_ASSERT(sc);
4102 if (bf->bf_flags & ATH_BUF_MGMT)
4103 TAILQ_INSERT_TAIL(&sc->sc_txbuf_mgmt, bf, bf_list);
4105 TAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list);
4107 if (sc->sc_txbuf_cnt > ath_txbuf) {
4108 device_printf(sc->sc_dev,
4109 "%s: sc_txbuf_cnt > %d?\n",
4112 sc->sc_txbuf_cnt = ath_txbuf;
4118 ath_returnbuf_head(struct ath_softc *sc, struct ath_buf *bf)
4121 ATH_TXBUF_LOCK_ASSERT(sc);
4123 if (bf->bf_flags & ATH_BUF_MGMT)
4124 TAILQ_INSERT_HEAD(&sc->sc_txbuf_mgmt, bf, bf_list);
4126 TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list);
4128 if (sc->sc_txbuf_cnt > ATH_TXBUF) {
4129 device_printf(sc->sc_dev,
4130 "%s: sc_txbuf_cnt > %d?\n",
4133 sc->sc_txbuf_cnt = ATH_TXBUF;
4139 * Return a buffer to the pool and update the 'busy' flag on the
4140 * previous 'tail' entry.
4142 * This _must_ only be called when the buffer is involved in a completed
4143 * TX. The logic is that if it was part of an active TX, the previous
4144 * buffer on the list is now not involved in a halted TX DMA queue, waiting
4145 * for restart (eg for TDMA.)
4147 * The caller must free the mbuf and recycle the node reference.
4150 ath_freebuf(struct ath_softc *sc, struct ath_buf *bf)
4152 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap);
4153 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_POSTWRITE);
4155 KASSERT((bf->bf_node == NULL), ("%s: bf->bf_node != NULL\n", __func__));
4156 KASSERT((bf->bf_m == NULL), ("%s: bf->bf_m != NULL\n", __func__));
4159 ath_tx_update_busy(sc);
4160 ath_returnbuf_tail(sc, bf);
4161 ATH_TXBUF_UNLOCK(sc);
4165 * This is currently used by ath_tx_draintxq() and
4166 * ath_tx_tid_free_pkts().
4168 * It recycles a single ath_buf.
4171 ath_tx_freebuf(struct ath_softc *sc, struct ath_buf *bf, int status)
4173 struct ieee80211_node *ni = bf->bf_node;
4174 struct mbuf *m0 = bf->bf_m;
4179 /* Free the buffer, it's not needed any longer */
4180 ath_freebuf(sc, bf);
4184 * Do any callback and reclaim the node reference.
4186 if (m0->m_flags & M_TXCB)
4187 ieee80211_process_callback(ni, m0, status);
4188 ieee80211_free_node(ni);
4193 * XXX the buffer used to be freed -after-, but the DMA map was
4194 * freed where ath_freebuf() now is. I've no idea what this
4200 ath_tx_draintxq(struct ath_softc *sc, struct ath_txq *txq)
4203 struct ath_hal *ah = sc->sc_ah;
4209 * NB: this assumes output has been stopped and
4210 * we do not need to block ath_tx_proc
4213 bf = TAILQ_LAST(&sc->sc_txbuf, ath_bufhead_s);
4215 bf->bf_flags &= ~ATH_BUF_BUSY;
4216 bf = TAILQ_LAST(&sc->sc_txbuf_mgmt, ath_bufhead_s);
4218 bf->bf_flags &= ~ATH_BUF_BUSY;
4219 ATH_TXBUF_UNLOCK(sc);
4221 for (ix = 0;; ix++) {
4223 bf = TAILQ_FIRST(&txq->axq_q);
4225 txq->axq_link = NULL;
4227 * There's currently no flag that indicates
4228 * a buffer is on the FIFO. So until that
4229 * occurs, just clear the FIFO counter here.
4231 * Yes, this means that if something in parallel
4232 * is pushing things onto this TXQ and pushing
4233 * _that_ into the hardware, things will get
4234 * very fruity very quickly.
4236 txq->axq_fifo_depth = 0;
4240 ATH_TXQ_REMOVE(txq, bf, bf_list);
4241 if (bf->bf_state.bfs_aggr)
4242 txq->axq_aggr_depth--;
4244 if (sc->sc_debug & ATH_DEBUG_RESET) {
4245 struct ieee80211com *ic = sc->sc_ifp->if_l2com;
4249 * EDMA operation has a TX completion FIFO
4250 * separate from the TX descriptor, so this
4251 * method of checking the "completion" status
4254 if (! sc->sc_isedma) {
4255 status = (ath_hal_txprocdesc(ah,
4257 &bf->bf_status.ds_txstat) == HAL_OK);
4259 ath_printtxbuf(sc, bf, txq->axq_qnum, ix, status);
4260 ieee80211_dump_pkt(ic, mtod(bf->bf_m, const uint8_t *),
4261 bf->bf_m->m_len, 0, -1);
4263 #endif /* ATH_DEBUG */
4265 * Since we're now doing magic in the completion
4266 * functions, we -must- call it for aggregation
4267 * destinations or BAW tracking will get upset.
4270 * Clear ATH_BUF_BUSY; the completion handler
4271 * will free the buffer.
4274 bf->bf_flags &= ~ATH_BUF_BUSY;
4276 bf->bf_comp(sc, bf, 1);
4278 ath_tx_default_comp(sc, bf, 1);
4282 * Drain software queued frames which are on
4285 ath_tx_txq_drain(sc, txq);
4289 ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq)
4291 struct ath_hal *ah = sc->sc_ah;
4293 DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n",
4294 __func__, txq->axq_qnum,
4295 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, txq->axq_qnum),
4297 (void) ath_hal_stoptxdma(ah, txq->axq_qnum);
4301 ath_stoptxdma(struct ath_softc *sc)
4303 struct ath_hal *ah = sc->sc_ah;
4306 /* XXX return value */
4310 if (!sc->sc_invalid) {
4311 /* don't touch the hardware if marked invalid */
4312 DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n",
4313 __func__, sc->sc_bhalq,
4314 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, sc->sc_bhalq),
4316 (void) ath_hal_stoptxdma(ah, sc->sc_bhalq);
4317 for (i = 0; i < HAL_NUM_TX_QUEUES; i++)
4318 if (ATH_TXQ_SETUP(sc, i))
4319 ath_tx_stopdma(sc, &sc->sc_txq[i]);
4326 * Drain the transmit queues and reclaim resources.
4329 ath_legacy_tx_drain(struct ath_softc *sc, ATH_RESET_TYPE reset_type)
4332 struct ath_hal *ah = sc->sc_ah;
4334 struct ifnet *ifp = sc->sc_ifp;
4337 (void) ath_stoptxdma(sc);
4339 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) {
4341 * XXX TODO: should we just handle the completed TX frames
4342 * here, whether or not the reset is a full one or not?
4344 if (ATH_TXQ_SETUP(sc, i)) {
4345 if (reset_type == ATH_RESET_NOLOSS)
4346 ath_tx_processq(sc, &sc->sc_txq[i], 0);
4348 ath_tx_draintxq(sc, &sc->sc_txq[i]);
4352 if (sc->sc_debug & ATH_DEBUG_RESET) {
4353 struct ath_buf *bf = TAILQ_FIRST(&sc->sc_bbuf);
4354 if (bf != NULL && bf->bf_m != NULL) {
4355 ath_printtxbuf(sc, bf, sc->sc_bhalq, 0,
4356 ath_hal_txprocdesc(ah, bf->bf_lastds,
4357 &bf->bf_status.ds_txstat) == HAL_OK);
4358 ieee80211_dump_pkt(ifp->if_l2com,
4359 mtod(bf->bf_m, const uint8_t *), bf->bf_m->m_len,
4363 #endif /* ATH_DEBUG */
4364 IF_LOCK(&ifp->if_snd);
4365 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
4366 IF_UNLOCK(&ifp->if_snd);
4367 sc->sc_wd_timer = 0;
4371 * Update internal state after a channel change.
4374 ath_chan_change(struct ath_softc *sc, struct ieee80211_channel *chan)
4376 enum ieee80211_phymode mode;
4379 * Change channels and update the h/w rate map
4380 * if we're switching; e.g. 11a to 11b/g.
4382 mode = ieee80211_chan2mode(chan);
4383 if (mode != sc->sc_curmode)
4384 ath_setcurmode(sc, mode);
4385 sc->sc_curchan = chan;
4389 * Set/change channels. If the channel is really being changed,
4390 * it's done by resetting the chip. To accomplish this we must
4391 * first cleanup any pending DMA, then restart stuff after a la
4395 ath_chan_set(struct ath_softc *sc, struct ieee80211_channel *chan)
4397 struct ifnet *ifp = sc->sc_ifp;
4398 struct ieee80211com *ic = ifp->if_l2com;
4399 struct ath_hal *ah = sc->sc_ah;
4402 /* Treat this as an interface reset */
4403 ATH_PCU_UNLOCK_ASSERT(sc);
4404 ATH_UNLOCK_ASSERT(sc);
4406 /* (Try to) stop TX/RX from occuring */
4407 taskqueue_block(sc->sc_tq);
4410 ath_hal_intrset(ah, 0); /* Stop new RX/TX completion */
4411 ath_txrx_stop_locked(sc); /* Stop pending RX/TX completion */
4412 if (ath_reset_grablock(sc, 1) == 0) {
4413 device_printf(sc->sc_dev, "%s: concurrent reset! Danger!\n",
4418 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %u (%u MHz, flags 0x%x)\n",
4419 __func__, ieee80211_chan2ieee(ic, chan),
4420 chan->ic_freq, chan->ic_flags);
4421 if (chan != sc->sc_curchan) {
4424 * To switch channels clear any pending DMA operations;
4425 * wait long enough for the RX fifo to drain, reset the
4426 * hardware at the new frequency, and then re-enable
4427 * the relevant bits of the h/w.
4430 ath_hal_intrset(ah, 0); /* disable interrupts */
4432 ath_stoprecv(sc, 1); /* turn off frame recv */
4434 * First, handle completed TX/RX frames.
4437 ath_draintxq(sc, ATH_RESET_NOLOSS);
4439 * Next, flush the non-scheduled frames.
4441 ath_draintxq(sc, ATH_RESET_FULL); /* clear pending tx frames */
4443 if (!ath_hal_reset(ah, sc->sc_opmode, chan, AH_TRUE, &status)) {
4444 if_printf(ifp, "%s: unable to reset "
4445 "channel %u (%u MHz, flags 0x%x), hal status %u\n",
4446 __func__, ieee80211_chan2ieee(ic, chan),
4447 chan->ic_freq, chan->ic_flags, status);
4451 sc->sc_diversity = ath_hal_getdiversity(ah);
4453 /* Let DFS at it in case it's a DFS channel */
4454 ath_dfs_radar_enable(sc, chan);
4456 /* Let spectral at in case spectral is enabled */
4457 ath_spectral_enable(sc, chan);
4460 * Re-enable rx framework.
4462 if (ath_startrecv(sc) != 0) {
4463 if_printf(ifp, "%s: unable to restart recv logic\n",
4470 * Change channels and update the h/w rate map
4471 * if we're switching; e.g. 11a to 11b/g.
4473 ath_chan_change(sc, chan);
4476 * Reset clears the beacon timers; reset them
4479 if (sc->sc_beacons) { /* restart beacons */
4480 #ifdef IEEE80211_SUPPORT_TDMA
4482 ath_tdma_config(sc, NULL);
4485 ath_beacon_config(sc, NULL);
4489 * Re-enable interrupts.
4492 ath_hal_intrset(ah, sc->sc_imask);
4498 sc->sc_inreset_cnt--;
4499 /* XXX only do this if sc_inreset_cnt == 0? */
4500 ath_hal_intrset(ah, sc->sc_imask);
4503 IF_LOCK(&ifp->if_snd);
4504 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
4505 IF_UNLOCK(&ifp->if_snd);
4507 /* XXX ath_start? */
4513 * Periodically recalibrate the PHY to account
4514 * for temperature/environment changes.
4517 ath_calibrate(void *arg)
4519 struct ath_softc *sc = arg;
4520 struct ath_hal *ah = sc->sc_ah;
4521 struct ifnet *ifp = sc->sc_ifp;
4522 struct ieee80211com *ic = ifp->if_l2com;
4523 HAL_BOOL longCal, isCalDone = AH_TRUE;
4524 HAL_BOOL aniCal, shortCal = AH_FALSE;
4527 if (ic->ic_flags & IEEE80211_F_SCAN) /* defer, off channel */
4529 longCal = (ticks - sc->sc_lastlongcal >= ath_longcalinterval*hz);
4530 aniCal = (ticks - sc->sc_lastani >= ath_anicalinterval*hz/1000);
4531 if (sc->sc_doresetcal)
4532 shortCal = (ticks - sc->sc_lastshortcal >= ath_shortcalinterval*hz/1000);
4534 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: shortCal=%d; longCal=%d; aniCal=%d\n", __func__, shortCal, longCal, aniCal);
4536 sc->sc_stats.ast_ani_cal++;
4537 sc->sc_lastani = ticks;
4538 ath_hal_ani_poll(ah, sc->sc_curchan);
4542 sc->sc_stats.ast_per_cal++;
4543 sc->sc_lastlongcal = ticks;
4544 if (ath_hal_getrfgain(ah) == HAL_RFGAIN_NEED_CHANGE) {
4546 * Rfgain is out of bounds, reset the chip
4547 * to load new gain values.
4549 DPRINTF(sc, ATH_DEBUG_CALIBRATE,
4550 "%s: rfgain change\n", __func__);
4551 sc->sc_stats.ast_per_rfgain++;
4552 sc->sc_resetcal = 0;
4553 sc->sc_doresetcal = AH_TRUE;
4554 taskqueue_enqueue(sc->sc_tq, &sc->sc_resettask);
4555 callout_reset(&sc->sc_cal_ch, 1, ath_calibrate, sc);
4559 * If this long cal is after an idle period, then
4560 * reset the data collection state so we start fresh.
4562 if (sc->sc_resetcal) {
4563 (void) ath_hal_calreset(ah, sc->sc_curchan);
4564 sc->sc_lastcalreset = ticks;
4565 sc->sc_lastshortcal = ticks;
4566 sc->sc_resetcal = 0;
4567 sc->sc_doresetcal = AH_TRUE;
4571 /* Only call if we're doing a short/long cal, not for ANI calibration */
4572 if (shortCal || longCal) {
4573 isCalDone = AH_FALSE;
4574 if (ath_hal_calibrateN(ah, sc->sc_curchan, longCal, &isCalDone)) {
4577 * Calibrate noise floor data again in case of change.
4579 ath_hal_process_noisefloor(ah);
4582 DPRINTF(sc, ATH_DEBUG_ANY,
4583 "%s: calibration of channel %u failed\n",
4584 __func__, sc->sc_curchan->ic_freq);
4585 sc->sc_stats.ast_per_calfail++;
4588 sc->sc_lastshortcal = ticks;
4593 * Use a shorter interval to potentially collect multiple
4594 * data samples required to complete calibration. Once
4595 * we're told the work is done we drop back to a longer
4596 * interval between requests. We're more aggressive doing
4597 * work when operating as an AP to improve operation right
4600 sc->sc_lastshortcal = ticks;
4601 nextcal = ath_shortcalinterval*hz/1000;
4602 if (sc->sc_opmode != HAL_M_HOSTAP)
4604 sc->sc_doresetcal = AH_TRUE;
4606 /* nextcal should be the shortest time for next event */
4607 nextcal = ath_longcalinterval*hz;
4608 if (sc->sc_lastcalreset == 0)
4609 sc->sc_lastcalreset = sc->sc_lastlongcal;
4610 else if (ticks - sc->sc_lastcalreset >= ath_resetcalinterval*hz)
4611 sc->sc_resetcal = 1; /* setup reset next trip */
4612 sc->sc_doresetcal = AH_FALSE;
4614 /* ANI calibration may occur more often than short/long/resetcal */
4615 if (ath_anicalinterval > 0)
4616 nextcal = MIN(nextcal, ath_anicalinterval*hz/1000);
4619 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: next +%u (%sisCalDone)\n",
4620 __func__, nextcal, isCalDone ? "" : "!");
4621 callout_reset(&sc->sc_cal_ch, nextcal, ath_calibrate, sc);
4623 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: calibration disabled\n",
4625 /* NB: don't rearm timer */
4630 ath_scan_start(struct ieee80211com *ic)
4632 struct ifnet *ifp = ic->ic_ifp;
4633 struct ath_softc *sc = ifp->if_softc;
4634 struct ath_hal *ah = sc->sc_ah;
4637 /* XXX calibration timer? */
4640 sc->sc_scanning = 1;
4641 sc->sc_syncbeacon = 0;
4642 rfilt = ath_calcrxfilter(sc);
4646 ath_hal_setrxfilter(ah, rfilt);
4647 ath_hal_setassocid(ah, ifp->if_broadcastaddr, 0);
4650 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0\n",
4651 __func__, rfilt, ether_sprintf(ifp->if_broadcastaddr));
4655 ath_scan_end(struct ieee80211com *ic)
4657 struct ifnet *ifp = ic->ic_ifp;
4658 struct ath_softc *sc = ifp->if_softc;
4659 struct ath_hal *ah = sc->sc_ah;
4663 sc->sc_scanning = 0;
4664 rfilt = ath_calcrxfilter(sc);
4668 ath_hal_setrxfilter(ah, rfilt);
4669 ath_hal_setassocid(ah, sc->sc_curbssid, sc->sc_curaid);
4671 ath_hal_process_noisefloor(ah);
4674 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0x%x\n",
4675 __func__, rfilt, ether_sprintf(sc->sc_curbssid),
4679 #ifdef ATH_ENABLE_11N
4681 * For now, just do a channel change.
4683 * Later, we'll go through the hard slog of suspending tx/rx, changing rate
4684 * control state and resetting the hardware without dropping frames out
4687 * The unfortunate trouble here is making absolutely sure that the
4688 * channel width change has propagated enough so the hardware
4689 * absolutely isn't handed bogus frames for it's current operating
4690 * mode. (Eg, 40MHz frames in 20MHz mode.) Since TX and RX can and
4691 * does occur in parallel, we need to make certain we've blocked
4692 * any further ongoing TX (and RX, that can cause raw TX)
4693 * before we do this.
4696 ath_update_chw(struct ieee80211com *ic)
4698 struct ifnet *ifp = ic->ic_ifp;
4699 struct ath_softc *sc = ifp->if_softc;
4701 DPRINTF(sc, ATH_DEBUG_STATE, "%s: called\n", __func__);
4702 ath_set_channel(ic);
4704 #endif /* ATH_ENABLE_11N */
4707 ath_set_channel(struct ieee80211com *ic)
4709 struct ifnet *ifp = ic->ic_ifp;
4710 struct ath_softc *sc = ifp->if_softc;
4712 (void) ath_chan_set(sc, ic->ic_curchan);
4714 * If we are returning to our bss channel then mark state
4715 * so the next recv'd beacon's tsf will be used to sync the
4716 * beacon timers. Note that since we only hear beacons in
4717 * sta/ibss mode this has no effect in other operating modes.
4720 if (!sc->sc_scanning && ic->ic_curchan == ic->ic_bsschan)
4721 sc->sc_syncbeacon = 1;
4726 * Walk the vap list and check if there any vap's in RUN state.
4729 ath_isanyrunningvaps(struct ieee80211vap *this)
4731 struct ieee80211com *ic = this->iv_ic;
4732 struct ieee80211vap *vap;
4734 IEEE80211_LOCK_ASSERT(ic);
4736 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
4737 if (vap != this && vap->iv_state >= IEEE80211_S_RUN)
4744 ath_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
4746 struct ieee80211com *ic = vap->iv_ic;
4747 struct ath_softc *sc = ic->ic_ifp->if_softc;
4748 struct ath_vap *avp = ATH_VAP(vap);
4749 struct ath_hal *ah = sc->sc_ah;
4750 struct ieee80211_node *ni = NULL;
4751 int i, error, stamode;
4753 int csa_run_transition = 0;
4755 static const HAL_LED_STATE leds[] = {
4756 HAL_LED_INIT, /* IEEE80211_S_INIT */
4757 HAL_LED_SCAN, /* IEEE80211_S_SCAN */
4758 HAL_LED_AUTH, /* IEEE80211_S_AUTH */
4759 HAL_LED_ASSOC, /* IEEE80211_S_ASSOC */
4760 HAL_LED_RUN, /* IEEE80211_S_CAC */
4761 HAL_LED_RUN, /* IEEE80211_S_RUN */
4762 HAL_LED_RUN, /* IEEE80211_S_CSA */
4763 HAL_LED_RUN, /* IEEE80211_S_SLEEP */
4766 DPRINTF(sc, ATH_DEBUG_STATE, "%s: %s -> %s\n", __func__,
4767 ieee80211_state_name[vap->iv_state],
4768 ieee80211_state_name[nstate]);
4771 * net80211 _should_ have the comlock asserted at this point.
4772 * There are some comments around the calls to vap->iv_newstate
4773 * which indicate that it (newstate) may end up dropping the
4774 * lock. This and the subsequent lock assert check after newstate
4775 * are an attempt to catch these and figure out how/why.
4777 IEEE80211_LOCK_ASSERT(ic);
4779 if (vap->iv_state == IEEE80211_S_CSA && nstate == IEEE80211_S_RUN)
4780 csa_run_transition = 1;
4782 callout_drain(&sc->sc_cal_ch);
4783 ath_hal_setledstate(ah, leds[nstate]); /* set LED */
4785 if (nstate == IEEE80211_S_SCAN) {
4787 * Scanning: turn off beacon miss and don't beacon.
4788 * Mark beacon state so when we reach RUN state we'll
4789 * [re]setup beacons. Unblock the task q thread so
4790 * deferred interrupt processing is done.
4793 sc->sc_imask &~ (HAL_INT_SWBA | HAL_INT_BMISS));
4794 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS);
4796 taskqueue_unblock(sc->sc_tq);
4799 ni = ieee80211_ref_node(vap->iv_bss);
4800 rfilt = ath_calcrxfilter(sc);
4801 stamode = (vap->iv_opmode == IEEE80211_M_STA ||
4802 vap->iv_opmode == IEEE80211_M_AHDEMO ||
4803 vap->iv_opmode == IEEE80211_M_IBSS);
4804 if (stamode && nstate == IEEE80211_S_RUN) {
4805 sc->sc_curaid = ni->ni_associd;
4806 IEEE80211_ADDR_COPY(sc->sc_curbssid, ni->ni_bssid);
4807 ath_hal_setassocid(ah, sc->sc_curbssid, sc->sc_curaid);
4809 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0x%x\n",
4810 __func__, rfilt, ether_sprintf(sc->sc_curbssid), sc->sc_curaid);
4811 ath_hal_setrxfilter(ah, rfilt);
4813 /* XXX is this to restore keycache on resume? */
4814 if (vap->iv_opmode != IEEE80211_M_STA &&
4815 (vap->iv_flags & IEEE80211_F_PRIVACY)) {
4816 for (i = 0; i < IEEE80211_WEP_NKID; i++)
4817 if (ath_hal_keyisvalid(ah, i))
4818 ath_hal_keysetmac(ah, i, ni->ni_bssid);
4822 * Invoke the parent method to do net80211 work.
4824 error = avp->av_newstate(vap, nstate, arg);
4829 * See above: ensure av_newstate() doesn't drop the lock
4832 IEEE80211_LOCK_ASSERT(ic);
4834 if (nstate == IEEE80211_S_RUN) {
4835 /* NB: collect bss node again, it may have changed */
4836 ieee80211_free_node(ni);
4837 ni = ieee80211_ref_node(vap->iv_bss);
4839 DPRINTF(sc, ATH_DEBUG_STATE,
4840 "%s(RUN): iv_flags 0x%08x bintvl %d bssid %s "
4841 "capinfo 0x%04x chan %d\n", __func__,
4842 vap->iv_flags, ni->ni_intval, ether_sprintf(ni->ni_bssid),
4843 ni->ni_capinfo, ieee80211_chan2ieee(ic, ic->ic_curchan));
4845 switch (vap->iv_opmode) {
4846 #ifdef IEEE80211_SUPPORT_TDMA
4847 case IEEE80211_M_AHDEMO:
4848 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0)
4852 case IEEE80211_M_HOSTAP:
4853 case IEEE80211_M_IBSS:
4854 case IEEE80211_M_MBSS:
4856 * Allocate and setup the beacon frame.
4858 * Stop any previous beacon DMA. This may be
4859 * necessary, for example, when an ibss merge
4860 * causes reconfiguration; there will be a state
4861 * transition from RUN->RUN that means we may
4862 * be called with beacon transmission active.
4864 ath_hal_stoptxdma(ah, sc->sc_bhalq);
4866 error = ath_beacon_alloc(sc, ni);
4870 * If joining an adhoc network defer beacon timer
4871 * configuration to the next beacon frame so we
4872 * have a current TSF to use. Otherwise we're
4873 * starting an ibss/bss so there's no need to delay;
4874 * if this is the first vap moving to RUN state, then
4875 * beacon state needs to be [re]configured.
4877 if (vap->iv_opmode == IEEE80211_M_IBSS &&
4878 ni->ni_tstamp.tsf != 0) {
4879 sc->sc_syncbeacon = 1;
4880 } else if (!sc->sc_beacons) {
4881 #ifdef IEEE80211_SUPPORT_TDMA
4882 if (vap->iv_caps & IEEE80211_C_TDMA)
4883 ath_tdma_config(sc, vap);
4886 ath_beacon_config(sc, vap);
4890 case IEEE80211_M_STA:
4892 * Defer beacon timer configuration to the next
4893 * beacon frame so we have a current TSF to use
4894 * (any TSF collected when scanning is likely old).
4895 * However if it's due to a CSA -> RUN transition,
4896 * force a beacon update so we pick up a lack of
4897 * beacons from an AP in CAC and thus force a
4900 * And, there's also corner cases here where
4901 * after a scan, the AP may have disappeared.
4902 * In that case, we may not receive an actual
4903 * beacon to update the beacon timer and thus we
4904 * won't get notified of the missing beacons.
4906 sc->sc_syncbeacon = 1;
4908 if (csa_run_transition)
4910 ath_beacon_config(sc, vap);
4915 * Reconfigure beacons during reset; as otherwise
4916 * we won't get the beacon timers reprogrammed
4917 * after a reset and thus we won't pick up a
4918 * beacon miss interrupt.
4920 * Hopefully we'll see a beacon before the BMISS
4921 * timer fires (too often), leading to a STA
4926 case IEEE80211_M_MONITOR:
4928 * Monitor mode vaps have only INIT->RUN and RUN->RUN
4929 * transitions so we must re-enable interrupts here to
4930 * handle the case of a single monitor mode vap.
4932 ath_hal_intrset(ah, sc->sc_imask);
4934 case IEEE80211_M_WDS:
4940 * Let the hal process statistics collected during a
4941 * scan so it can provide calibrated noise floor data.
4943 ath_hal_process_noisefloor(ah);
4945 * Reset rssi stats; maybe not the best place...
4947 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
4948 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
4949 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
4951 * Finally, start any timers and the task q thread
4952 * (in case we didn't go through SCAN state).
4954 if (ath_longcalinterval != 0) {
4955 /* start periodic recalibration timer */
4956 callout_reset(&sc->sc_cal_ch, 1, ath_calibrate, sc);
4958 DPRINTF(sc, ATH_DEBUG_CALIBRATE,
4959 "%s: calibration disabled\n", __func__);
4961 taskqueue_unblock(sc->sc_tq);
4962 } else if (nstate == IEEE80211_S_INIT) {
4964 * If there are no vaps left in RUN state then
4965 * shutdown host/driver operation:
4966 * o disable interrupts
4967 * o disable the task queue thread
4968 * o mark beacon processing as stopped
4970 if (!ath_isanyrunningvaps(vap)) {
4971 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS);
4972 /* disable interrupts */
4973 ath_hal_intrset(ah, sc->sc_imask &~ HAL_INT_GLOBAL);
4974 taskqueue_block(sc->sc_tq);
4977 #ifdef IEEE80211_SUPPORT_TDMA
4978 ath_hal_setcca(ah, AH_TRUE);
4982 ieee80211_free_node(ni);
4987 * Allocate a key cache slot to the station so we can
4988 * setup a mapping from key index to node. The key cache
4989 * slot is needed for managing antenna state and for
4990 * compression when stations do not use crypto. We do
4991 * it uniliaterally here; if crypto is employed this slot
4992 * will be reassigned.
4995 ath_setup_stationkey(struct ieee80211_node *ni)
4997 struct ieee80211vap *vap = ni->ni_vap;
4998 struct ath_softc *sc = vap->iv_ic->ic_ifp->if_softc;
4999 ieee80211_keyix keyix, rxkeyix;
5001 /* XXX should take a locked ref to vap->iv_bss */
5002 if (!ath_key_alloc(vap, &ni->ni_ucastkey, &keyix, &rxkeyix)) {
5004 * Key cache is full; we'll fall back to doing
5005 * the more expensive lookup in software. Note
5006 * this also means no h/w compression.
5008 /* XXX msg+statistic */
5011 ni->ni_ucastkey.wk_keyix = keyix;
5012 ni->ni_ucastkey.wk_rxkeyix = rxkeyix;
5013 /* NB: must mark device key to get called back on delete */
5014 ni->ni_ucastkey.wk_flags |= IEEE80211_KEY_DEVKEY;
5015 IEEE80211_ADDR_COPY(ni->ni_ucastkey.wk_macaddr, ni->ni_macaddr);
5016 /* NB: this will create a pass-thru key entry */
5017 ath_keyset(sc, vap, &ni->ni_ucastkey, vap->iv_bss);
5022 * Setup driver-specific state for a newly associated node.
5023 * Note that we're called also on a re-associate, the isnew
5024 * param tells us if this is the first time or not.
5027 ath_newassoc(struct ieee80211_node *ni, int isnew)
5029 struct ath_node *an = ATH_NODE(ni);
5030 struct ieee80211vap *vap = ni->ni_vap;
5031 struct ath_softc *sc = vap->iv_ic->ic_ifp->if_softc;
5032 const struct ieee80211_txparam *tp = ni->ni_txparms;
5034 an->an_mcastrix = ath_tx_findrix(sc, tp->mcastrate);
5035 an->an_mgmtrix = ath_tx_findrix(sc, tp->mgmtrate);
5037 ath_rate_newassoc(sc, an, isnew);
5039 (vap->iv_flags & IEEE80211_F_PRIVACY) == 0 && sc->sc_hasclrkey &&
5040 ni->ni_ucastkey.wk_keyix == IEEE80211_KEYIX_NONE)
5041 ath_setup_stationkey(ni);
5045 ath_setregdomain(struct ieee80211com *ic, struct ieee80211_regdomain *reg,
5046 int nchans, struct ieee80211_channel chans[])
5048 struct ath_softc *sc = ic->ic_ifp->if_softc;
5049 struct ath_hal *ah = sc->sc_ah;
5052 DPRINTF(sc, ATH_DEBUG_REGDOMAIN,
5053 "%s: rd %u cc %u location %c%s\n",
5054 __func__, reg->regdomain, reg->country, reg->location,
5055 reg->ecm ? " ecm" : "");
5057 status = ath_hal_set_channels(ah, chans, nchans,
5058 reg->country, reg->regdomain);
5059 if (status != HAL_OK) {
5060 DPRINTF(sc, ATH_DEBUG_REGDOMAIN, "%s: failed, status %u\n",
5062 return EINVAL; /* XXX */
5069 ath_getradiocaps(struct ieee80211com *ic,
5070 int maxchans, int *nchans, struct ieee80211_channel chans[])
5072 struct ath_softc *sc = ic->ic_ifp->if_softc;
5073 struct ath_hal *ah = sc->sc_ah;
5075 DPRINTF(sc, ATH_DEBUG_REGDOMAIN, "%s: use rd %u cc %d\n",
5076 __func__, SKU_DEBUG, CTRY_DEFAULT);
5078 /* XXX check return */
5079 (void) ath_hal_getchannels(ah, chans, maxchans, nchans,
5080 HAL_MODE_ALL, CTRY_DEFAULT, SKU_DEBUG, AH_TRUE);
5085 ath_getchannels(struct ath_softc *sc)
5087 struct ifnet *ifp = sc->sc_ifp;
5088 struct ieee80211com *ic = ifp->if_l2com;
5089 struct ath_hal *ah = sc->sc_ah;
5093 * Collect channel set based on EEPROM contents.
5095 status = ath_hal_init_channels(ah, ic->ic_channels, IEEE80211_CHAN_MAX,
5096 &ic->ic_nchans, HAL_MODE_ALL, CTRY_DEFAULT, SKU_NONE, AH_TRUE);
5097 if (status != HAL_OK) {
5098 if_printf(ifp, "%s: unable to collect channel list from hal, "
5099 "status %d\n", __func__, status);
5102 (void) ath_hal_getregdomain(ah, &sc->sc_eerd);
5103 ath_hal_getcountrycode(ah, &sc->sc_eecc); /* NB: cannot fail */
5104 /* XXX map Atheros sku's to net80211 SKU's */
5105 /* XXX net80211 types too small */
5106 ic->ic_regdomain.regdomain = (uint16_t) sc->sc_eerd;
5107 ic->ic_regdomain.country = (uint16_t) sc->sc_eecc;
5108 ic->ic_regdomain.isocc[0] = ' '; /* XXX don't know */
5109 ic->ic_regdomain.isocc[1] = ' ';
5111 ic->ic_regdomain.ecm = 1;
5112 ic->ic_regdomain.location = 'I';
5114 DPRINTF(sc, ATH_DEBUG_REGDOMAIN,
5115 "%s: eeprom rd %u cc %u (mapped rd %u cc %u) location %c%s\n",
5116 __func__, sc->sc_eerd, sc->sc_eecc,
5117 ic->ic_regdomain.regdomain, ic->ic_regdomain.country,
5118 ic->ic_regdomain.location, ic->ic_regdomain.ecm ? " ecm" : "");
5123 ath_rate_setup(struct ath_softc *sc, u_int mode)
5125 struct ath_hal *ah = sc->sc_ah;
5126 const HAL_RATE_TABLE *rt;
5129 case IEEE80211_MODE_11A:
5130 rt = ath_hal_getratetable(ah, HAL_MODE_11A);
5132 case IEEE80211_MODE_HALF:
5133 rt = ath_hal_getratetable(ah, HAL_MODE_11A_HALF_RATE);
5135 case IEEE80211_MODE_QUARTER:
5136 rt = ath_hal_getratetable(ah, HAL_MODE_11A_QUARTER_RATE);
5138 case IEEE80211_MODE_11B:
5139 rt = ath_hal_getratetable(ah, HAL_MODE_11B);
5141 case IEEE80211_MODE_11G:
5142 rt = ath_hal_getratetable(ah, HAL_MODE_11G);
5144 case IEEE80211_MODE_TURBO_A:
5145 rt = ath_hal_getratetable(ah, HAL_MODE_108A);
5147 case IEEE80211_MODE_TURBO_G:
5148 rt = ath_hal_getratetable(ah, HAL_MODE_108G);
5150 case IEEE80211_MODE_STURBO_A:
5151 rt = ath_hal_getratetable(ah, HAL_MODE_TURBO);
5153 case IEEE80211_MODE_11NA:
5154 rt = ath_hal_getratetable(ah, HAL_MODE_11NA_HT20);
5156 case IEEE80211_MODE_11NG:
5157 rt = ath_hal_getratetable(ah, HAL_MODE_11NG_HT20);
5160 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid mode %u\n",
5164 sc->sc_rates[mode] = rt;
5165 return (rt != NULL);
5169 ath_setcurmode(struct ath_softc *sc, enum ieee80211_phymode mode)
5171 #define N(a) (sizeof(a)/sizeof(a[0]))
5172 /* NB: on/off times from the Atheros NDIS driver, w/ permission */
5173 static const struct {
5174 u_int rate; /* tx/rx 802.11 rate */
5175 u_int16_t timeOn; /* LED on time (ms) */
5176 u_int16_t timeOff; /* LED off time (ms) */
5192 /* XXX half/quarter rates */
5194 const HAL_RATE_TABLE *rt;
5197 memset(sc->sc_rixmap, 0xff, sizeof(sc->sc_rixmap));
5198 rt = sc->sc_rates[mode];
5199 KASSERT(rt != NULL, ("no h/w rate set for phy mode %u", mode));
5200 for (i = 0; i < rt->rateCount; i++) {
5201 uint8_t ieeerate = rt->info[i].dot11Rate & IEEE80211_RATE_VAL;
5202 if (rt->info[i].phy != IEEE80211_T_HT)
5203 sc->sc_rixmap[ieeerate] = i;
5205 sc->sc_rixmap[ieeerate | IEEE80211_RATE_MCS] = i;
5207 memset(sc->sc_hwmap, 0, sizeof(sc->sc_hwmap));
5208 for (i = 0; i < N(sc->sc_hwmap); i++) {
5209 if (i >= rt->rateCount) {
5210 sc->sc_hwmap[i].ledon = (500 * hz) / 1000;
5211 sc->sc_hwmap[i].ledoff = (130 * hz) / 1000;
5214 sc->sc_hwmap[i].ieeerate =
5215 rt->info[i].dot11Rate & IEEE80211_RATE_VAL;
5216 if (rt->info[i].phy == IEEE80211_T_HT)
5217 sc->sc_hwmap[i].ieeerate |= IEEE80211_RATE_MCS;
5218 sc->sc_hwmap[i].txflags = IEEE80211_RADIOTAP_F_DATAPAD;
5219 if (rt->info[i].shortPreamble ||
5220 rt->info[i].phy == IEEE80211_T_OFDM)
5221 sc->sc_hwmap[i].txflags |= IEEE80211_RADIOTAP_F_SHORTPRE;
5222 sc->sc_hwmap[i].rxflags = sc->sc_hwmap[i].txflags;
5223 for (j = 0; j < N(blinkrates)-1; j++)
5224 if (blinkrates[j].rate == sc->sc_hwmap[i].ieeerate)
5226 /* NB: this uses the last entry if the rate isn't found */
5227 /* XXX beware of overlow */
5228 sc->sc_hwmap[i].ledon = (blinkrates[j].timeOn * hz) / 1000;
5229 sc->sc_hwmap[i].ledoff = (blinkrates[j].timeOff * hz) / 1000;
5231 sc->sc_currates = rt;
5232 sc->sc_curmode = mode;
5234 * All protection frames are transmited at 2Mb/s for
5235 * 11g, otherwise at 1Mb/s.
5237 if (mode == IEEE80211_MODE_11G)
5238 sc->sc_protrix = ath_tx_findrix(sc, 2*2);
5240 sc->sc_protrix = ath_tx_findrix(sc, 2*1);
5241 /* NB: caller is responsible for resetting rate control state */
5246 ath_watchdog(void *arg)
5248 struct ath_softc *sc = arg;
5251 if (sc->sc_wd_timer != 0 && --sc->sc_wd_timer == 0) {
5252 struct ifnet *ifp = sc->sc_ifp;
5255 if (ath_hal_gethangstate(sc->sc_ah, 0xffff, &hangs) &&
5257 if_printf(ifp, "%s hang detected (0x%x)\n",
5258 hangs & 0xff ? "bb" : "mac", hangs);
5260 if_printf(ifp, "device timeout\n");
5263 sc->sc_stats.ast_watchdog++;
5267 * We can't hold the lock across the ath_reset() call.
5269 * And since this routine can't hold a lock and sleep,
5270 * do the reset deferred.
5273 taskqueue_enqueue(sc->sc_tq, &sc->sc_resettask);
5276 callout_schedule(&sc->sc_wd_ch, hz);
5280 * Fetch the rate control statistics for the given node.
5283 ath_ioctl_ratestats(struct ath_softc *sc, struct ath_rateioctl *rs)
5285 struct ath_node *an;
5286 struct ieee80211com *ic = sc->sc_ifp->if_l2com;
5287 struct ieee80211_node *ni;
5290 /* Perform a lookup on the given node */
5291 ni = ieee80211_find_node(&ic->ic_sta, rs->is_u.macaddr);
5297 /* Lock the ath_node */
5301 /* Fetch the rate control stats for this node */
5302 error = ath_rate_fetch_node_stats(sc, an, rs);
5304 /* No matter what happens here, just drop through */
5306 /* Unlock the ath_node */
5307 ATH_NODE_UNLOCK(an);
5309 /* Unref the node */
5310 ieee80211_node_decref(ni);
5318 * Diagnostic interface to the HAL. This is used by various
5319 * tools to do things like retrieve register contents for
5320 * debugging. The mechanism is intentionally opaque so that
5321 * it can change frequently w/o concern for compatiblity.
5324 ath_ioctl_diag(struct ath_softc *sc, struct ath_diag *ad)
5326 struct ath_hal *ah = sc->sc_ah;
5327 u_int id = ad->ad_id & ATH_DIAG_ID;
5328 void *indata = NULL;
5329 void *outdata = NULL;
5330 u_int32_t insize = ad->ad_in_size;
5331 u_int32_t outsize = ad->ad_out_size;
5334 if (ad->ad_id & ATH_DIAG_IN) {
5338 indata = malloc(insize, M_TEMP, M_NOWAIT);
5339 if (indata == NULL) {
5343 error = copyin(ad->ad_in_data, indata, insize);
5347 if (ad->ad_id & ATH_DIAG_DYN) {
5349 * Allocate a buffer for the results (otherwise the HAL
5350 * returns a pointer to a buffer where we can read the
5351 * results). Note that we depend on the HAL leaving this
5352 * pointer for us to use below in reclaiming the buffer;
5353 * may want to be more defensive.
5355 outdata = malloc(outsize, M_TEMP, M_NOWAIT);
5356 if (outdata == NULL) {
5361 if (ath_hal_getdiagstate(ah, id, indata, insize, &outdata, &outsize)) {
5362 if (outsize < ad->ad_out_size)
5363 ad->ad_out_size = outsize;
5364 if (outdata != NULL)
5365 error = copyout(outdata, ad->ad_out_data,
5371 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL)
5372 free(indata, M_TEMP);
5373 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL)
5374 free(outdata, M_TEMP);
5377 #endif /* ATH_DIAGAPI */
5380 ath_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
5382 #define IS_RUNNING(ifp) \
5383 ((ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING))
5384 struct ath_softc *sc = ifp->if_softc;
5385 struct ieee80211com *ic = ifp->if_l2com;
5386 struct ifreq *ifr = (struct ifreq *)data;
5387 const HAL_RATE_TABLE *rt;
5393 if (IS_RUNNING(ifp)) {
5395 * To avoid rescanning another access point,
5396 * do not call ath_init() here. Instead,
5397 * only reflect promisc mode settings.
5400 } else if (ifp->if_flags & IFF_UP) {
5402 * Beware of being called during attach/detach
5403 * to reset promiscuous mode. In that case we
5404 * will still be marked UP but not RUNNING.
5405 * However trying to re-init the interface
5406 * is the wrong thing to do as we've already
5407 * torn down much of our state. There's
5408 * probably a better way to deal with this.
5410 if (!sc->sc_invalid)
5411 ath_init(sc); /* XXX lose error */
5413 ath_stop_locked(ifp);
5415 /* XXX must wakeup in places like ath_vap_delete */
5416 if (!sc->sc_invalid)
5417 ath_hal_setpower(sc->sc_ah, HAL_PM_FULL_SLEEP);
5424 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
5427 /* NB: embed these numbers to get a consistent view */
5428 sc->sc_stats.ast_tx_packets = ifp->if_opackets;
5429 sc->sc_stats.ast_rx_packets = ifp->if_ipackets;
5430 sc->sc_stats.ast_tx_rssi = ATH_RSSI(sc->sc_halstats.ns_avgtxrssi);
5431 sc->sc_stats.ast_rx_rssi = ATH_RSSI(sc->sc_halstats.ns_avgrssi);
5432 #ifdef IEEE80211_SUPPORT_TDMA
5433 sc->sc_stats.ast_tdma_tsfadjp = TDMA_AVG(sc->sc_avgtsfdeltap);
5434 sc->sc_stats.ast_tdma_tsfadjm = TDMA_AVG(sc->sc_avgtsfdeltam);
5436 rt = sc->sc_currates;
5437 sc->sc_stats.ast_tx_rate =
5438 rt->info[sc->sc_txrix].dot11Rate &~ IEEE80211_RATE_BASIC;
5439 if (rt->info[sc->sc_txrix].phy & IEEE80211_T_HT)
5440 sc->sc_stats.ast_tx_rate |= IEEE80211_RATE_MCS;
5441 return copyout(&sc->sc_stats,
5442 ifr->ifr_data, sizeof (sc->sc_stats));
5443 case SIOCGATHAGSTATS:
5444 return copyout(&sc->sc_aggr_stats,
5445 ifr->ifr_data, sizeof (sc->sc_aggr_stats));
5447 error = priv_check(curthread, PRIV_DRIVER);
5449 memset(&sc->sc_stats, 0, sizeof(sc->sc_stats));
5450 memset(&sc->sc_aggr_stats, 0,
5451 sizeof(sc->sc_aggr_stats));
5452 memset(&sc->sc_intr_stats, 0,
5453 sizeof(sc->sc_intr_stats));
5458 error = ath_ioctl_diag(sc, (struct ath_diag *) ifr);
5460 case SIOCGATHPHYERR:
5461 error = ath_ioctl_phyerr(sc,(struct ath_diag*) ifr);
5464 case SIOCGATHSPECTRAL:
5465 error = ath_ioctl_spectral(sc,(struct ath_diag*) ifr);
5467 case SIOCGATHNODERATESTATS:
5468 error = ath_ioctl_ratestats(sc, (struct ath_rateioctl *) ifr);
5471 error = ether_ioctl(ifp, cmd, data);
5482 * Announce various information on device/driver attach.
5485 ath_announce(struct ath_softc *sc)
5487 struct ifnet *ifp = sc->sc_ifp;
5488 struct ath_hal *ah = sc->sc_ah;
5490 if_printf(ifp, "AR%s mac %d.%d RF%s phy %d.%d\n",
5491 ath_hal_mac_name(ah), ah->ah_macVersion, ah->ah_macRev,
5492 ath_hal_rf_name(ah), ah->ah_phyRev >> 4, ah->ah_phyRev & 0xf);
5493 if_printf(ifp, "2GHz radio: 0x%.4x; 5GHz radio: 0x%.4x\n",
5494 ah->ah_analog2GhzRev, ah->ah_analog5GhzRev);
5497 for (i = 0; i <= WME_AC_VO; i++) {
5498 struct ath_txq *txq = sc->sc_ac2q[i];
5499 if_printf(ifp, "Use hw queue %u for %s traffic\n",
5500 txq->axq_qnum, ieee80211_wme_acnames[i]);
5502 if_printf(ifp, "Use hw queue %u for CAB traffic\n",
5503 sc->sc_cabq->axq_qnum);
5504 if_printf(ifp, "Use hw queue %u for beacons\n", sc->sc_bhalq);
5506 if (ath_rxbuf != ATH_RXBUF)
5507 if_printf(ifp, "using %u rx buffers\n", ath_rxbuf);
5508 if (ath_txbuf != ATH_TXBUF)
5509 if_printf(ifp, "using %u tx buffers\n", ath_txbuf);
5510 if (sc->sc_mcastkey && bootverbose)
5511 if_printf(ifp, "using multicast key search\n");
5515 ath_dfs_tasklet(void *p, int npending)
5517 struct ath_softc *sc = (struct ath_softc *) p;
5518 struct ifnet *ifp = sc->sc_ifp;
5519 struct ieee80211com *ic = ifp->if_l2com;
5522 * If previous processing has found a radar event,
5523 * signal this to the net80211 layer to begin DFS
5526 if (ath_dfs_process_radar_event(sc, sc->sc_curchan)) {
5527 /* DFS event found, initiate channel change */
5529 * XXX doesn't currently tell us whether the event
5530 * XXX was found in the primary or extension
5534 ieee80211_dfs_notify_radar(ic, sc->sc_curchan);
5535 IEEE80211_UNLOCK(ic);
5540 * Enable/disable power save. This must be called with
5541 * no TX driver locks currently held, so it should only
5542 * be called from the RX path (which doesn't hold any
5546 ath_node_powersave(struct ieee80211_node *ni, int enable)
5549 struct ath_node *an = ATH_NODE(ni);
5550 struct ieee80211com *ic = ni->ni_ic;
5551 struct ath_softc *sc = ic->ic_ifp->if_softc;
5552 struct ath_vap *avp = ATH_VAP(ni->ni_vap);
5554 ATH_NODE_UNLOCK_ASSERT(an);
5555 /* XXX and no TXQ locks should be held here */
5557 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, "%s: ni=%p, enable=%d\n",
5558 __func__, ni, enable);
5560 /* Suspend or resume software queue handling */
5562 ath_tx_node_sleep(sc, an);
5564 ath_tx_node_wakeup(sc, an);
5566 /* Update net80211 state */
5567 avp->av_node_ps(ni, enable);
5569 struct ath_vap *avp = ATH_VAP(ni->ni_vap);
5571 /* Update net80211 state */
5572 avp->av_node_ps(ni, enable);
5573 #endif/* ATH_SW_PSQ */
5577 * Notification from net80211 that the powersave queue state has
5580 * Since the software queue also may have some frames:
5582 * + if the node software queue has frames and the TID state
5583 * is 0, we set the TIM;
5584 * + if the node and the stack are both empty, we clear the TIM bit.
5585 * + If the stack tries to set the bit, always set it.
5586 * + If the stack tries to clear the bit, only clear it if the
5587 * software queue in question is also cleared.
5589 * TODO: this is called during node teardown; so let's ensure this
5590 * is all correctly handled and that the TIM bit is cleared.
5591 * It may be that the node flush is called _AFTER_ the net80211
5592 * stack clears the TIM.
5594 * Here is the racy part. Since it's possible >1 concurrent,
5595 * overlapping TXes will appear complete with a TX completion in
5596 * another thread, it's possible that the concurrent TIM calls will
5597 * clash. We can't hold the node lock here because setting the
5598 * TIM grabs the net80211 comlock and this may cause a LOR.
5599 * The solution is either to totally serialise _everything_ at
5600 * this point (ie, all TX, completion and any reset/flush go into
5601 * one taskqueue) or a new "ath TIM lock" needs to be created that
5602 * just wraps the driver state change and this call to avp->av_set_tim().
5604 * The same race exists in the net80211 power save queue handling
5605 * as well. Since multiple transmitting threads may queue frames
5606 * into the driver, as well as ps-poll and the driver transmitting
5607 * frames (and thus clearing the psq), it's quite possible that
5608 * a packet entering the PSQ and a ps-poll being handled will
5609 * race, causing the TIM to be cleared and not re-set.
5612 ath_node_set_tim(struct ieee80211_node *ni, int enable)
5615 struct ieee80211com *ic = ni->ni_ic;
5616 struct ath_softc *sc = ic->ic_ifp->if_softc;
5617 struct ath_node *an = ATH_NODE(ni);
5618 struct ath_vap *avp = ATH_VAP(ni->ni_vap);
5621 ATH_NODE_UNLOCK_ASSERT(an);
5624 * For now, just track and then update the TIM.
5627 an->an_stack_psq = enable;
5630 * This will get called for all operating modes,
5631 * even if avp->av_set_tim is unset.
5632 * It's currently set for hostap/ibss modes; but
5633 * the same infrastructure is used for both STA
5634 * and AP/IBSS node power save.
5636 if (avp->av_set_tim == NULL) {
5637 ATH_NODE_UNLOCK(an);
5642 * If setting the bit, always set it here.
5643 * If clearing the bit, only clear it if the
5644 * software queue is also empty.
5646 * If the node has left power save, just clear the TIM
5647 * bit regardless of the state of the power save queue.
5649 * XXX TODO: although atomics are used, it's quite possible
5650 * that a race will occur between this and setting/clearing
5651 * in another thread. TX completion will occur always in
5652 * one thread, however setting/clearing the TIM bit can come
5653 * from a variety of different process contexts!
5655 if (enable && an->an_tim_set == 1) {
5656 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
5657 "%s: an=%p, enable=%d, tim_set=1, ignoring\n",
5658 __func__, an, enable);
5659 ATH_NODE_UNLOCK(an);
5660 } else if (enable) {
5661 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
5662 "%s: an=%p, enable=%d, enabling TIM\n",
5663 __func__, an, enable);
5665 ATH_NODE_UNLOCK(an);
5666 changed = avp->av_set_tim(ni, enable);
5667 } else if (atomic_load_acq_int(&an->an_swq_depth) == 0) {
5669 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
5670 "%s: an=%p, enable=%d, an_swq_depth == 0, disabling\n",
5671 __func__, an, enable);
5673 ATH_NODE_UNLOCK(an);
5674 changed = avp->av_set_tim(ni, enable);
5675 } else if (! an->an_is_powersave) {
5677 * disable regardless; the node isn't in powersave now
5679 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
5680 "%s: an=%p, enable=%d, an_pwrsave=0, disabling\n",
5681 __func__, an, enable);
5683 ATH_NODE_UNLOCK(an);
5684 changed = avp->av_set_tim(ni, enable);
5687 * psq disable, node is currently in powersave, node
5688 * software queue isn't empty, so don't clear the TIM bit
5691 ATH_NODE_UNLOCK(an);
5692 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
5693 "%s: enable=%d, an_swq_depth > 0, ignoring\n",
5700 struct ath_vap *avp = ATH_VAP(ni->ni_vap);
5703 * Some operating modes don't set av_set_tim(), so don't
5706 if (avp->av_set_tim == NULL)
5709 return (avp->av_set_tim(ni, enable));
5710 #endif /* ATH_SW_PSQ */
5714 * Set or update the TIM from the software queue.
5716 * Check the software queue depth before attempting to do lock
5717 * anything; that avoids trying to obtain the lock. Then,
5718 * re-check afterwards to ensure nothing has changed in the
5721 * set: This is designed to be called from the TX path, after
5722 * a frame has been queued; to see if the swq > 0.
5724 * clear: This is designed to be called from the buffer completion point
5725 * (right now it's ath_tx_default_comp()) where the state of
5726 * a software queue has changed.
5728 * It makes sense to place it at buffer free / completion rather
5729 * than after each software queue operation, as there's no real
5730 * point in churning the TIM bit as the last frames in the software
5731 * queue are transmitted. If they fail and we retry them, we'd
5732 * just be setting the TIM bit again anyway.
5735 ath_tx_update_tim(struct ath_softc *sc, struct ieee80211_node *ni,
5739 struct ath_node *an;
5740 struct ath_vap *avp;
5742 /* Don't do this for broadcast/etc frames */
5747 avp = ATH_VAP(ni->ni_vap);
5750 * And for operating modes without the TIM handler set, let's
5753 if (avp->av_set_tim == NULL)
5756 ATH_NODE_UNLOCK_ASSERT(an);
5760 * Don't bother grabbing the lock unless the queue is not
5763 if (atomic_load_acq_int(&an->an_swq_depth) == 0)
5767 if (an->an_is_powersave &&
5768 an->an_tim_set == 0 &&
5769 atomic_load_acq_int(&an->an_swq_depth) != 0) {
5770 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
5771 "%s: an=%p, swq_depth>0, tim_set=0, set!\n",
5774 ATH_NODE_UNLOCK(an);
5775 (void) avp->av_set_tim(ni, 1);
5777 ATH_NODE_UNLOCK(an);
5781 * Don't bother grabbing the lock unless the queue is empty.
5783 if (atomic_load_acq_int(&an->an_swq_depth) != 0)
5787 if (an->an_is_powersave &&
5788 an->an_stack_psq == 0 &&
5789 an->an_tim_set == 1 &&
5790 atomic_load_acq_int(&an->an_swq_depth) == 0) {
5791 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
5792 "%s: an=%p, swq_depth=0, tim_set=1, psq_set=0,"
5796 ATH_NODE_UNLOCK(an);
5797 (void) avp->av_set_tim(ni, 0);
5799 ATH_NODE_UNLOCK(an);
5804 #endif /* ATH_SW_PSQ */
5807 MODULE_VERSION(if_ath, 1);
5808 MODULE_DEPEND(if_ath, wlan, 1, 1, 1); /* 802.11 media layer */
5809 #if defined(IEEE80211_ALQ) || defined(AH_DEBUG_ALQ)
5810 MODULE_DEPEND(if_ath, alq, 1, 1, 1);