1 /*- 2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 15 * 16 * NO WARRANTY 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. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 /* 34 * Driver for the Atheros Wireless LAN controller. 35 * 36 * This software is derived from work of Atsushi Onoe; his contribution 37 * is greatly appreciated. 38 */ 39 40 #include "opt_inet.h" 41 #include "opt_ath.h" 42 /* 43 * This is needed for register operations which are performed 44 * by the driver - eg, calls to ath_hal_gettsf32(). 45 * 46 * It's also required for any AH_DEBUG checks in here, eg the 47 * module dependencies. 48 */ 49 #include "opt_ah.h" 50 #include "opt_wlan.h" 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/sysctl.h> 55 #include <sys/mbuf.h> 56 #include <sys/malloc.h> 57 #include <sys/lock.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> 64 #include <sys/bus.h> 65 #include <sys/endian.h> 66 #include <sys/kthread.h> 67 #include <sys/taskqueue.h> 68 #include <sys/priv.h> 69 #include <sys/module.h> 70 #include <sys/ktr.h> 71 #include <sys/smp.h> /* for mp_ncpus */ 72 73 #include <machine/bus.h> 74 75 #include <net/if.h> 76 #include <net/if_var.h> 77 #include <net/if_dl.h> 78 #include <net/if_media.h> 79 #include <net/if_types.h> 80 #include <net/if_arp.h> 81 #include <net/ethernet.h> 82 #include <net/if_llc.h> 83 84 #include <net80211/ieee80211_var.h> 85 #include <net80211/ieee80211_regdomain.h> 86 #ifdef IEEE80211_SUPPORT_SUPERG 87 #include <net80211/ieee80211_superg.h> 88 #endif 89 #ifdef IEEE80211_SUPPORT_TDMA 90 #include <net80211/ieee80211_tdma.h> 91 #endif 92 93 #include <net/bpf.h> 94 95 #ifdef INET 96 #include <netinet/in.h> 97 #include <netinet/if_ether.h> 98 #endif 99 100 #include <dev/ath/if_athvar.h> 101 #include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */ 102 #include <dev/ath/ath_hal/ah_diagcodes.h> 103 104 #include <dev/ath/if_ath_debug.h> 105 #include <dev/ath/if_ath_misc.h> 106 #include <dev/ath/if_ath_tsf.h> 107 #include <dev/ath/if_ath_tx.h> 108 #include <dev/ath/if_ath_sysctl.h> 109 #include <dev/ath/if_ath_led.h> 110 #include <dev/ath/if_ath_keycache.h> 111 #include <dev/ath/if_ath_rx.h> 112 #include <dev/ath/if_ath_rx_edma.h> 113 #include <dev/ath/if_ath_tx_edma.h> 114 #include <dev/ath/if_ath_beacon.h> 115 #include <dev/ath/if_ath_btcoex.h> 116 #include <dev/ath/if_ath_spectral.h> 117 #include <dev/ath/if_ath_lna_div.h> 118 #include <dev/ath/if_athdfs.h> 119 120 #ifdef ATH_TX99_DIAG 121 #include <dev/ath/ath_tx99/ath_tx99.h> 122 #endif 123 124 #ifdef ATH_DEBUG_ALQ 125 #include <dev/ath/if_ath_alq.h> 126 #endif 127 128 /* 129 * Only enable this if you're working on PS-POLL support. 130 */ 131 #define ATH_SW_PSQ 132 133 /* 134 * ATH_BCBUF determines the number of vap's that can transmit 135 * beacons and also (currently) the number of vap's that can 136 * have unique mac addresses/bssid. When staggering beacons 137 * 4 is probably a good max as otherwise the beacons become 138 * very closely spaced and there is limited time for cab q traffic 139 * to go out. You can burst beacons instead but that is not good 140 * for stations in power save and at some point you really want 141 * another radio (and channel). 142 * 143 * The limit on the number of mac addresses is tied to our use of 144 * the U/L bit and tracking addresses in a byte; it would be 145 * worthwhile to allow more for applications like proxy sta. 146 */ 147 CTASSERT(ATH_BCBUF <= 8); 148 149 static struct ieee80211vap *ath_vap_create(struct ieee80211com *, 150 const char [IFNAMSIZ], int, enum ieee80211_opmode, int, 151 const uint8_t [IEEE80211_ADDR_LEN], 152 const uint8_t [IEEE80211_ADDR_LEN]); 153 static void ath_vap_delete(struct ieee80211vap *); 154 static void ath_init(void *); 155 static void ath_stop_locked(struct ifnet *); 156 static void ath_stop(struct ifnet *); 157 static int ath_reset_vap(struct ieee80211vap *, u_long); 158 static int ath_transmit(struct ifnet *ifp, struct mbuf *m); 159 static void ath_qflush(struct ifnet *ifp); 160 static int ath_media_change(struct ifnet *); 161 static void ath_watchdog(void *); 162 static int ath_ioctl(struct ifnet *, u_long, caddr_t); 163 static void ath_fatal_proc(void *, int); 164 static void ath_bmiss_vap(struct ieee80211vap *); 165 static void ath_bmiss_proc(void *, int); 166 static void ath_key_update_begin(struct ieee80211vap *); 167 static void ath_key_update_end(struct ieee80211vap *); 168 static void ath_update_mcast(struct ifnet *); 169 static void ath_update_promisc(struct ifnet *); 170 static void ath_updateslot(struct ifnet *); 171 static void ath_bstuck_proc(void *, int); 172 static void ath_reset_proc(void *, int); 173 static int ath_desc_alloc(struct ath_softc *); 174 static void ath_desc_free(struct ath_softc *); 175 static struct ieee80211_node *ath_node_alloc(struct ieee80211vap *, 176 const uint8_t [IEEE80211_ADDR_LEN]); 177 static void ath_node_cleanup(struct ieee80211_node *); 178 static void ath_node_free(struct ieee80211_node *); 179 static void ath_node_getsignal(const struct ieee80211_node *, 180 int8_t *, int8_t *); 181 static void ath_txq_init(struct ath_softc *sc, struct ath_txq *, int); 182 static struct ath_txq *ath_txq_setup(struct ath_softc*, int qtype, int subtype); 183 static int ath_tx_setup(struct ath_softc *, int, int); 184 static void ath_tx_cleanupq(struct ath_softc *, struct ath_txq *); 185 static void ath_tx_cleanup(struct ath_softc *); 186 static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq, 187 int dosched); 188 static void ath_tx_proc_q0(void *, int); 189 static void ath_tx_proc_q0123(void *, int); 190 static void ath_tx_proc(void *, int); 191 static void ath_txq_sched_tasklet(void *, int); 192 static int ath_chan_set(struct ath_softc *, struct ieee80211_channel *); 193 static void ath_chan_change(struct ath_softc *, struct ieee80211_channel *); 194 static void ath_scan_start(struct ieee80211com *); 195 static void ath_scan_end(struct ieee80211com *); 196 static void ath_set_channel(struct ieee80211com *); 197 #ifdef ATH_ENABLE_11N 198 static void ath_update_chw(struct ieee80211com *); 199 #endif /* ATH_ENABLE_11N */ 200 static void ath_calibrate(void *); 201 static int ath_newstate(struct ieee80211vap *, enum ieee80211_state, int); 202 static void ath_setup_stationkey(struct ieee80211_node *); 203 static void ath_newassoc(struct ieee80211_node *, int); 204 static int ath_setregdomain(struct ieee80211com *, 205 struct ieee80211_regdomain *, int, 206 struct ieee80211_channel []); 207 static void ath_getradiocaps(struct ieee80211com *, int, int *, 208 struct ieee80211_channel []); 209 static int ath_getchannels(struct ath_softc *); 210 211 static int ath_rate_setup(struct ath_softc *, u_int mode); 212 static void ath_setcurmode(struct ath_softc *, enum ieee80211_phymode); 213 214 static void ath_announce(struct ath_softc *); 215 216 static void ath_dfs_tasklet(void *, int); 217 static void ath_node_powersave(struct ieee80211_node *, int); 218 static int ath_node_set_tim(struct ieee80211_node *, int); 219 static void ath_node_recv_pspoll(struct ieee80211_node *, struct mbuf *); 220 221 #ifdef IEEE80211_SUPPORT_TDMA 222 #include <dev/ath/if_ath_tdma.h> 223 #endif 224 225 SYSCTL_DECL(_hw_ath); 226 227 /* XXX validate sysctl values */ 228 static int ath_longcalinterval = 30; /* long cals every 30 secs */ 229 SYSCTL_INT(_hw_ath, OID_AUTO, longcal, CTLFLAG_RW, &ath_longcalinterval, 230 0, "long chip calibration interval (secs)"); 231 static int ath_shortcalinterval = 100; /* short cals every 100 ms */ 232 SYSCTL_INT(_hw_ath, OID_AUTO, shortcal, CTLFLAG_RW, &ath_shortcalinterval, 233 0, "short chip calibration interval (msecs)"); 234 static int ath_resetcalinterval = 20*60; /* reset cal state 20 mins */ 235 SYSCTL_INT(_hw_ath, OID_AUTO, resetcal, CTLFLAG_RW, &ath_resetcalinterval, 236 0, "reset chip calibration results (secs)"); 237 static int ath_anicalinterval = 100; /* ANI calibration - 100 msec */ 238 SYSCTL_INT(_hw_ath, OID_AUTO, anical, CTLFLAG_RW, &ath_anicalinterval, 239 0, "ANI calibration (msecs)"); 240 241 int ath_rxbuf = ATH_RXBUF; /* # rx buffers to allocate */ 242 SYSCTL_INT(_hw_ath, OID_AUTO, rxbuf, CTLFLAG_RW, &ath_rxbuf, 243 0, "rx buffers allocated"); 244 TUNABLE_INT("hw.ath.rxbuf", &ath_rxbuf); 245 int ath_txbuf = ATH_TXBUF; /* # tx buffers to allocate */ 246 SYSCTL_INT(_hw_ath, OID_AUTO, txbuf, CTLFLAG_RW, &ath_txbuf, 247 0, "tx buffers allocated"); 248 TUNABLE_INT("hw.ath.txbuf", &ath_txbuf); 249 int ath_txbuf_mgmt = ATH_MGMT_TXBUF; /* # mgmt tx buffers to allocate */ 250 SYSCTL_INT(_hw_ath, OID_AUTO, txbuf_mgmt, CTLFLAG_RW, &ath_txbuf_mgmt, 251 0, "tx (mgmt) buffers allocated"); 252 TUNABLE_INT("hw.ath.txbuf_mgmt", &ath_txbuf_mgmt); 253 254 int ath_bstuck_threshold = 4; /* max missed beacons */ 255 SYSCTL_INT(_hw_ath, OID_AUTO, bstuck, CTLFLAG_RW, &ath_bstuck_threshold, 256 0, "max missed beacon xmits before chip reset"); 257 258 MALLOC_DEFINE(M_ATHDEV, "athdev", "ath driver dma buffers"); 259 260 void 261 ath_legacy_attach_comp_func(struct ath_softc *sc) 262 { 263 264 /* 265 * Special case certain configurations. Note the 266 * CAB queue is handled by these specially so don't 267 * include them when checking the txq setup mask. 268 */ 269 switch (sc->sc_txqsetup &~ (1<<sc->sc_cabq->axq_qnum)) { 270 case 0x01: 271 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0, sc); 272 break; 273 case 0x0f: 274 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0123, sc); 275 break; 276 default: 277 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc, sc); 278 break; 279 } 280 } 281 282 #define HAL_MODE_HT20 (HAL_MODE_11NG_HT20 | HAL_MODE_11NA_HT20) 283 #define HAL_MODE_HT40 \ 284 (HAL_MODE_11NG_HT40PLUS | HAL_MODE_11NG_HT40MINUS | \ 285 HAL_MODE_11NA_HT40PLUS | HAL_MODE_11NA_HT40MINUS) 286 int 287 ath_attach(u_int16_t devid, struct ath_softc *sc) 288 { 289 struct ifnet *ifp; 290 struct ieee80211com *ic; 291 struct ath_hal *ah = NULL; 292 HAL_STATUS status; 293 int error = 0, i; 294 u_int wmodes; 295 uint8_t macaddr[IEEE80211_ADDR_LEN]; 296 int rx_chainmask, tx_chainmask; 297 298 DPRINTF(sc, ATH_DEBUG_ANY, "%s: devid 0x%x\n", __func__, devid); 299 300 CURVNET_SET(vnet0); 301 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211); 302 if (ifp == NULL) { 303 device_printf(sc->sc_dev, "can not if_alloc()\n"); 304 error = ENOSPC; 305 CURVNET_RESTORE(); 306 goto bad; 307 } 308 ic = ifp->if_l2com; 309 310 /* set these up early for if_printf use */ 311 if_initname(ifp, device_get_name(sc->sc_dev), 312 device_get_unit(sc->sc_dev)); 313 CURVNET_RESTORE(); 314 315 ah = ath_hal_attach(devid, sc, sc->sc_st, sc->sc_sh, 316 sc->sc_eepromdata, &status); 317 if (ah == NULL) { 318 if_printf(ifp, "unable to attach hardware; HAL status %u\n", 319 status); 320 error = ENXIO; 321 goto bad; 322 } 323 sc->sc_ah = ah; 324 sc->sc_invalid = 0; /* ready to go, enable interrupt handling */ 325 #ifdef ATH_DEBUG 326 sc->sc_debug = ath_debug; 327 #endif 328 329 /* 330 * Setup the DMA/EDMA functions based on the current 331 * hardware support. 332 * 333 * This is required before the descriptors are allocated. 334 */ 335 if (ath_hal_hasedma(sc->sc_ah)) { 336 sc->sc_isedma = 1; 337 ath_recv_setup_edma(sc); 338 ath_xmit_setup_edma(sc); 339 } else { 340 ath_recv_setup_legacy(sc); 341 ath_xmit_setup_legacy(sc); 342 } 343 344 /* 345 * Check if the MAC has multi-rate retry support. 346 * We do this by trying to setup a fake extended 347 * descriptor. MAC's that don't have support will 348 * return false w/o doing anything. MAC's that do 349 * support it will return true w/o doing anything. 350 */ 351 sc->sc_mrretry = ath_hal_setupxtxdesc(ah, NULL, 0,0, 0,0, 0,0); 352 353 /* 354 * Check if the device has hardware counters for PHY 355 * errors. If so we need to enable the MIB interrupt 356 * so we can act on stat triggers. 357 */ 358 if (ath_hal_hwphycounters(ah)) 359 sc->sc_needmib = 1; 360 361 /* 362 * Get the hardware key cache size. 363 */ 364 sc->sc_keymax = ath_hal_keycachesize(ah); 365 if (sc->sc_keymax > ATH_KEYMAX) { 366 if_printf(ifp, "Warning, using only %u of %u key cache slots\n", 367 ATH_KEYMAX, sc->sc_keymax); 368 sc->sc_keymax = ATH_KEYMAX; 369 } 370 /* 371 * Reset the key cache since some parts do not 372 * reset the contents on initial power up. 373 */ 374 for (i = 0; i < sc->sc_keymax; i++) 375 ath_hal_keyreset(ah, i); 376 377 /* 378 * Collect the default channel list. 379 */ 380 error = ath_getchannels(sc); 381 if (error != 0) 382 goto bad; 383 384 /* 385 * Setup rate tables for all potential media types. 386 */ 387 ath_rate_setup(sc, IEEE80211_MODE_11A); 388 ath_rate_setup(sc, IEEE80211_MODE_11B); 389 ath_rate_setup(sc, IEEE80211_MODE_11G); 390 ath_rate_setup(sc, IEEE80211_MODE_TURBO_A); 391 ath_rate_setup(sc, IEEE80211_MODE_TURBO_G); 392 ath_rate_setup(sc, IEEE80211_MODE_STURBO_A); 393 ath_rate_setup(sc, IEEE80211_MODE_11NA); 394 ath_rate_setup(sc, IEEE80211_MODE_11NG); 395 ath_rate_setup(sc, IEEE80211_MODE_HALF); 396 ath_rate_setup(sc, IEEE80211_MODE_QUARTER); 397 398 /* NB: setup here so ath_rate_update is happy */ 399 ath_setcurmode(sc, IEEE80211_MODE_11A); 400 401 /* 402 * Allocate TX descriptors and populate the lists. 403 */ 404 error = ath_desc_alloc(sc); 405 if (error != 0) { 406 if_printf(ifp, "failed to allocate TX descriptors: %d\n", 407 error); 408 goto bad; 409 } 410 error = ath_txdma_setup(sc); 411 if (error != 0) { 412 if_printf(ifp, "failed to allocate TX descriptors: %d\n", 413 error); 414 goto bad; 415 } 416 417 /* 418 * Allocate RX descriptors and populate the lists. 419 */ 420 error = ath_rxdma_setup(sc); 421 if (error != 0) { 422 if_printf(ifp, "failed to allocate RX descriptors: %d\n", 423 error); 424 goto bad; 425 } 426 427 callout_init_mtx(&sc->sc_cal_ch, &sc->sc_mtx, 0); 428 callout_init_mtx(&sc->sc_wd_ch, &sc->sc_mtx, 0); 429 430 ATH_TXBUF_LOCK_INIT(sc); 431 432 sc->sc_tq = taskqueue_create("ath_taskq", M_NOWAIT, 433 taskqueue_thread_enqueue, &sc->sc_tq); 434 taskqueue_start_threads(&sc->sc_tq, 1, PI_NET, 435 "%s taskq", ifp->if_xname); 436 437 TASK_INIT(&sc->sc_rxtask, 0, sc->sc_rx.recv_tasklet, sc); 438 TASK_INIT(&sc->sc_bmisstask, 0, ath_bmiss_proc, sc); 439 TASK_INIT(&sc->sc_bstucktask,0, ath_bstuck_proc, sc); 440 TASK_INIT(&sc->sc_resettask,0, ath_reset_proc, sc); 441 TASK_INIT(&sc->sc_txqtask, 0, ath_txq_sched_tasklet, sc); 442 TASK_INIT(&sc->sc_fataltask, 0, ath_fatal_proc, sc); 443 444 /* 445 * Allocate hardware transmit queues: one queue for 446 * beacon frames and one data queue for each QoS 447 * priority. Note that the hal handles resetting 448 * these queues at the needed time. 449 * 450 * XXX PS-Poll 451 */ 452 sc->sc_bhalq = ath_beaconq_setup(sc); 453 if (sc->sc_bhalq == (u_int) -1) { 454 if_printf(ifp, "unable to setup a beacon xmit queue!\n"); 455 error = EIO; 456 goto bad2; 457 } 458 sc->sc_cabq = ath_txq_setup(sc, HAL_TX_QUEUE_CAB, 0); 459 if (sc->sc_cabq == NULL) { 460 if_printf(ifp, "unable to setup CAB xmit queue!\n"); 461 error = EIO; 462 goto bad2; 463 } 464 /* NB: insure BK queue is the lowest priority h/w queue */ 465 if (!ath_tx_setup(sc, WME_AC_BK, HAL_WME_AC_BK)) { 466 if_printf(ifp, "unable to setup xmit queue for %s traffic!\n", 467 ieee80211_wme_acnames[WME_AC_BK]); 468 error = EIO; 469 goto bad2; 470 } 471 if (!ath_tx_setup(sc, WME_AC_BE, HAL_WME_AC_BE) || 472 !ath_tx_setup(sc, WME_AC_VI, HAL_WME_AC_VI) || 473 !ath_tx_setup(sc, WME_AC_VO, HAL_WME_AC_VO)) { 474 /* 475 * Not enough hardware tx queues to properly do WME; 476 * just punt and assign them all to the same h/w queue. 477 * We could do a better job of this if, for example, 478 * we allocate queues when we switch from station to 479 * AP mode. 480 */ 481 if (sc->sc_ac2q[WME_AC_VI] != NULL) 482 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_VI]); 483 if (sc->sc_ac2q[WME_AC_BE] != NULL) 484 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_BE]); 485 sc->sc_ac2q[WME_AC_BE] = sc->sc_ac2q[WME_AC_BK]; 486 sc->sc_ac2q[WME_AC_VI] = sc->sc_ac2q[WME_AC_BK]; 487 sc->sc_ac2q[WME_AC_VO] = sc->sc_ac2q[WME_AC_BK]; 488 } 489 490 /* 491 * Attach the TX completion function. 492 * 493 * The non-EDMA chips may have some special case optimisations; 494 * this method gives everyone a chance to attach cleanly. 495 */ 496 sc->sc_tx.xmit_attach_comp_func(sc); 497 498 /* 499 * Setup rate control. Some rate control modules 500 * call back to change the anntena state so expose 501 * the necessary entry points. 502 * XXX maybe belongs in struct ath_ratectrl? 503 */ 504 sc->sc_setdefantenna = ath_setdefantenna; 505 sc->sc_rc = ath_rate_attach(sc); 506 if (sc->sc_rc == NULL) { 507 error = EIO; 508 goto bad2; 509 } 510 511 /* Attach DFS module */ 512 if (! ath_dfs_attach(sc)) { 513 device_printf(sc->sc_dev, 514 "%s: unable to attach DFS\n", __func__); 515 error = EIO; 516 goto bad2; 517 } 518 519 /* Attach spectral module */ 520 if (ath_spectral_attach(sc) < 0) { 521 device_printf(sc->sc_dev, 522 "%s: unable to attach spectral\n", __func__); 523 error = EIO; 524 goto bad2; 525 } 526 527 /* Attach bluetooth coexistence module */ 528 if (ath_btcoex_attach(sc) < 0) { 529 device_printf(sc->sc_dev, 530 "%s: unable to attach bluetooth coexistence\n", __func__); 531 error = EIO; 532 goto bad2; 533 } 534 535 /* Attach LNA diversity module */ 536 if (ath_lna_div_attach(sc) < 0) { 537 device_printf(sc->sc_dev, 538 "%s: unable to attach LNA diversity\n", __func__); 539 error = EIO; 540 goto bad2; 541 } 542 543 /* Start DFS processing tasklet */ 544 TASK_INIT(&sc->sc_dfstask, 0, ath_dfs_tasklet, sc); 545 546 /* Configure LED state */ 547 sc->sc_blinking = 0; 548 sc->sc_ledstate = 1; 549 sc->sc_ledon = 0; /* low true */ 550 sc->sc_ledidle = (2700*hz)/1000; /* 2.7sec */ 551 callout_init(&sc->sc_ledtimer, CALLOUT_MPSAFE); 552 553 /* 554 * Don't setup hardware-based blinking. 555 * 556 * Although some NICs may have this configured in the 557 * default reset register values, the user may wish 558 * to alter which pins have which function. 559 * 560 * The reference driver attaches the MAC network LED to GPIO1 and 561 * the MAC power LED to GPIO2. However, the DWA-552 cardbus 562 * NIC has these reversed. 563 */ 564 sc->sc_hardled = (1 == 0); 565 sc->sc_led_net_pin = -1; 566 sc->sc_led_pwr_pin = -1; 567 /* 568 * Auto-enable soft led processing for IBM cards and for 569 * 5211 minipci cards. Users can also manually enable/disable 570 * support with a sysctl. 571 */ 572 sc->sc_softled = (devid == AR5212_DEVID_IBM || devid == AR5211_DEVID); 573 ath_led_config(sc); 574 ath_hal_setledstate(ah, HAL_LED_INIT); 575 576 ifp->if_softc = sc; 577 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 578 ifp->if_transmit = ath_transmit; 579 ifp->if_qflush = ath_qflush; 580 ifp->if_ioctl = ath_ioctl; 581 ifp->if_init = ath_init; 582 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 583 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 584 IFQ_SET_READY(&ifp->if_snd); 585 586 ic->ic_ifp = ifp; 587 /* XXX not right but it's not used anywhere important */ 588 ic->ic_phytype = IEEE80211_T_OFDM; 589 ic->ic_opmode = IEEE80211_M_STA; 590 ic->ic_caps = 591 IEEE80211_C_STA /* station mode */ 592 | IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ 593 | IEEE80211_C_HOSTAP /* hostap mode */ 594 | IEEE80211_C_MONITOR /* monitor mode */ 595 | IEEE80211_C_AHDEMO /* adhoc demo mode */ 596 | IEEE80211_C_WDS /* 4-address traffic works */ 597 | IEEE80211_C_MBSS /* mesh point link mode */ 598 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 599 | IEEE80211_C_SHSLOT /* short slot time supported */ 600 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ 601 #ifndef ATH_ENABLE_11N 602 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 603 #endif 604 | IEEE80211_C_TXFRAG /* handle tx frags */ 605 #ifdef ATH_ENABLE_DFS 606 | IEEE80211_C_DFS /* Enable radar detection */ 607 #endif 608 ; 609 /* 610 * Query the hal to figure out h/w crypto support. 611 */ 612 if (ath_hal_ciphersupported(ah, HAL_CIPHER_WEP)) 613 ic->ic_cryptocaps |= IEEE80211_CRYPTO_WEP; 614 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_OCB)) 615 ic->ic_cryptocaps |= IEEE80211_CRYPTO_AES_OCB; 616 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_CCM)) 617 ic->ic_cryptocaps |= IEEE80211_CRYPTO_AES_CCM; 618 if (ath_hal_ciphersupported(ah, HAL_CIPHER_CKIP)) 619 ic->ic_cryptocaps |= IEEE80211_CRYPTO_CKIP; 620 if (ath_hal_ciphersupported(ah, HAL_CIPHER_TKIP)) { 621 ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIP; 622 /* 623 * Check if h/w does the MIC and/or whether the 624 * separate key cache entries are required to 625 * handle both tx+rx MIC keys. 626 */ 627 if (ath_hal_ciphersupported(ah, HAL_CIPHER_MIC)) 628 ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIPMIC; 629 /* 630 * If the h/w supports storing tx+rx MIC keys 631 * in one cache slot automatically enable use. 632 */ 633 if (ath_hal_hastkipsplit(ah) || 634 !ath_hal_settkipsplit(ah, AH_FALSE)) 635 sc->sc_splitmic = 1; 636 /* 637 * If the h/w can do TKIP MIC together with WME then 638 * we use it; otherwise we force the MIC to be done 639 * in software by the net80211 layer. 640 */ 641 if (ath_hal_haswmetkipmic(ah)) 642 sc->sc_wmetkipmic = 1; 643 } 644 sc->sc_hasclrkey = ath_hal_ciphersupported(ah, HAL_CIPHER_CLR); 645 /* 646 * Check for multicast key search support. 647 */ 648 if (ath_hal_hasmcastkeysearch(sc->sc_ah) && 649 !ath_hal_getmcastkeysearch(sc->sc_ah)) { 650 ath_hal_setmcastkeysearch(sc->sc_ah, 1); 651 } 652 sc->sc_mcastkey = ath_hal_getmcastkeysearch(ah); 653 /* 654 * Mark key cache slots associated with global keys 655 * as in use. If we knew TKIP was not to be used we 656 * could leave the +32, +64, and +32+64 slots free. 657 */ 658 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 659 setbit(sc->sc_keymap, i); 660 setbit(sc->sc_keymap, i+64); 661 if (sc->sc_splitmic) { 662 setbit(sc->sc_keymap, i+32); 663 setbit(sc->sc_keymap, i+32+64); 664 } 665 } 666 /* 667 * TPC support can be done either with a global cap or 668 * per-packet support. The latter is not available on 669 * all parts. We're a bit pedantic here as all parts 670 * support a global cap. 671 */ 672 if (ath_hal_hastpc(ah) || ath_hal_hastxpowlimit(ah)) 673 ic->ic_caps |= IEEE80211_C_TXPMGT; 674 675 /* 676 * Mark WME capability only if we have sufficient 677 * hardware queues to do proper priority scheduling. 678 */ 679 if (sc->sc_ac2q[WME_AC_BE] != sc->sc_ac2q[WME_AC_BK]) 680 ic->ic_caps |= IEEE80211_C_WME; 681 /* 682 * Check for misc other capabilities. 683 */ 684 if (ath_hal_hasbursting(ah)) 685 ic->ic_caps |= IEEE80211_C_BURST; 686 sc->sc_hasbmask = ath_hal_hasbssidmask(ah); 687 sc->sc_hasbmatch = ath_hal_hasbssidmatch(ah); 688 sc->sc_hastsfadd = ath_hal_hastsfadjust(ah); 689 sc->sc_rxslink = ath_hal_self_linked_final_rxdesc(ah); 690 sc->sc_rxtsf32 = ath_hal_has_long_rxdesc_tsf(ah); 691 sc->sc_hasenforcetxop = ath_hal_hasenforcetxop(ah); 692 sc->sc_rx_lnamixer = ath_hal_hasrxlnamixer(ah); 693 sc->sc_hasdivcomb = ath_hal_hasdivantcomb(ah); 694 695 if (ath_hal_hasfastframes(ah)) 696 ic->ic_caps |= IEEE80211_C_FF; 697 wmodes = ath_hal_getwirelessmodes(ah); 698 if (wmodes & (HAL_MODE_108G|HAL_MODE_TURBO)) 699 ic->ic_caps |= IEEE80211_C_TURBOP; 700 #ifdef IEEE80211_SUPPORT_TDMA 701 if (ath_hal_macversion(ah) > 0x78) { 702 ic->ic_caps |= IEEE80211_C_TDMA; /* capable of TDMA */ 703 ic->ic_tdma_update = ath_tdma_update; 704 } 705 #endif 706 707 /* 708 * TODO: enforce that at least this many frames are available 709 * in the txbuf list before allowing data frames (raw or 710 * otherwise) to be transmitted. 711 */ 712 sc->sc_txq_data_minfree = 10; 713 /* 714 * Leave this as default to maintain legacy behaviour. 715 * Shortening the cabq/mcastq may end up causing some 716 * undesirable behaviour. 717 */ 718 sc->sc_txq_mcastq_maxdepth = ath_txbuf; 719 720 /* 721 * How deep can the node software TX queue get whilst it's asleep. 722 */ 723 sc->sc_txq_node_psq_maxdepth = 16; 724 725 /* 726 * Default the maximum queue depth for a given node 727 * to 1/4'th the TX buffers, or 64, whichever 728 * is larger. 729 */ 730 sc->sc_txq_node_maxdepth = MAX(64, ath_txbuf / 4); 731 732 /* Enable CABQ by default */ 733 sc->sc_cabq_enable = 1; 734 735 /* 736 * Allow the TX and RX chainmasks to be overridden by 737 * environment variables and/or device.hints. 738 * 739 * This must be done early - before the hardware is 740 * calibrated or before the 802.11n stream calculation 741 * is done. 742 */ 743 if (resource_int_value(device_get_name(sc->sc_dev), 744 device_get_unit(sc->sc_dev), "rx_chainmask", 745 &rx_chainmask) == 0) { 746 device_printf(sc->sc_dev, "Setting RX chainmask to 0x%x\n", 747 rx_chainmask); 748 (void) ath_hal_setrxchainmask(sc->sc_ah, rx_chainmask); 749 } 750 if (resource_int_value(device_get_name(sc->sc_dev), 751 device_get_unit(sc->sc_dev), "tx_chainmask", 752 &tx_chainmask) == 0) { 753 device_printf(sc->sc_dev, "Setting TX chainmask to 0x%x\n", 754 tx_chainmask); 755 (void) ath_hal_settxchainmask(sc->sc_ah, tx_chainmask); 756 } 757 758 /* 759 * Query the TX/RX chainmask configuration. 760 * 761 * This is only relevant for 11n devices. 762 */ 763 ath_hal_getrxchainmask(ah, &sc->sc_rxchainmask); 764 ath_hal_gettxchainmask(ah, &sc->sc_txchainmask); 765 766 /* 767 * Disable MRR with protected frames by default. 768 * Only 802.11n series NICs can handle this. 769 */ 770 sc->sc_mrrprot = 0; /* XXX should be a capability */ 771 772 /* 773 * Query the enterprise mode information the HAL. 774 */ 775 if (ath_hal_getcapability(ah, HAL_CAP_ENTERPRISE_MODE, 0, 776 &sc->sc_ent_cfg) == HAL_OK) 777 sc->sc_use_ent = 1; 778 779 #ifdef ATH_ENABLE_11N 780 /* 781 * Query HT capabilities 782 */ 783 if (ath_hal_getcapability(ah, HAL_CAP_HT, 0, NULL) == HAL_OK && 784 (wmodes & (HAL_MODE_HT20 | HAL_MODE_HT40))) { 785 uint32_t rxs, txs; 786 787 device_printf(sc->sc_dev, "[HT] enabling HT modes\n"); 788 789 sc->sc_mrrprot = 1; /* XXX should be a capability */ 790 791 ic->ic_htcaps = IEEE80211_HTC_HT /* HT operation */ 792 | IEEE80211_HTC_AMPDU /* A-MPDU tx/rx */ 793 | IEEE80211_HTC_AMSDU /* A-MSDU tx/rx */ 794 | IEEE80211_HTCAP_MAXAMSDU_3839 795 /* max A-MSDU length */ 796 | IEEE80211_HTCAP_SMPS_OFF; /* SM power save off */ 797 ; 798 799 /* 800 * Enable short-GI for HT20 only if the hardware 801 * advertises support. 802 * Notably, anything earlier than the AR9287 doesn't. 803 */ 804 if ((ath_hal_getcapability(ah, 805 HAL_CAP_HT20_SGI, 0, NULL) == HAL_OK) && 806 (wmodes & HAL_MODE_HT20)) { 807 device_printf(sc->sc_dev, 808 "[HT] enabling short-GI in 20MHz mode\n"); 809 ic->ic_htcaps |= IEEE80211_HTCAP_SHORTGI20; 810 } 811 812 if (wmodes & HAL_MODE_HT40) 813 ic->ic_htcaps |= IEEE80211_HTCAP_CHWIDTH40 814 | IEEE80211_HTCAP_SHORTGI40; 815 816 /* 817 * TX/RX streams need to be taken into account when 818 * negotiating which MCS rates it'll receive and 819 * what MCS rates are available for TX. 820 */ 821 (void) ath_hal_getcapability(ah, HAL_CAP_STREAMS, 0, &txs); 822 (void) ath_hal_getcapability(ah, HAL_CAP_STREAMS, 1, &rxs); 823 ic->ic_txstream = txs; 824 ic->ic_rxstream = rxs; 825 826 /* 827 * Setup TX and RX STBC based on what the HAL allows and 828 * the currently configured chainmask set. 829 * Ie - don't enable STBC TX if only one chain is enabled. 830 * STBC RX is fine on a single RX chain; it just won't 831 * provide any real benefit. 832 */ 833 if (ath_hal_getcapability(ah, HAL_CAP_RX_STBC, 0, 834 NULL) == HAL_OK) { 835 sc->sc_rx_stbc = 1; 836 device_printf(sc->sc_dev, 837 "[HT] 1 stream STBC receive enabled\n"); 838 ic->ic_htcaps |= IEEE80211_HTCAP_RXSTBC_1STREAM; 839 } 840 if (txs > 1 && ath_hal_getcapability(ah, HAL_CAP_TX_STBC, 0, 841 NULL) == HAL_OK) { 842 sc->sc_tx_stbc = 1; 843 device_printf(sc->sc_dev, 844 "[HT] 1 stream STBC transmit enabled\n"); 845 ic->ic_htcaps |= IEEE80211_HTCAP_TXSTBC; 846 } 847 848 (void) ath_hal_getcapability(ah, HAL_CAP_RTS_AGGR_LIMIT, 1, 849 &sc->sc_rts_aggr_limit); 850 if (sc->sc_rts_aggr_limit != (64 * 1024)) 851 device_printf(sc->sc_dev, 852 "[HT] RTS aggregates limited to %d KiB\n", 853 sc->sc_rts_aggr_limit / 1024); 854 855 device_printf(sc->sc_dev, 856 "[HT] %d RX streams; %d TX streams\n", rxs, txs); 857 } 858 #endif 859 860 /* 861 * Initial aggregation settings. 862 */ 863 sc->sc_hwq_limit_aggr = ATH_AGGR_MIN_QDEPTH; 864 sc->sc_hwq_limit_nonaggr = ATH_NONAGGR_MIN_QDEPTH; 865 sc->sc_tid_hwq_lo = ATH_AGGR_SCHED_LOW; 866 sc->sc_tid_hwq_hi = ATH_AGGR_SCHED_HIGH; 867 sc->sc_aggr_limit = ATH_AGGR_MAXSIZE; 868 sc->sc_delim_min_pad = 0; 869 870 /* 871 * Check if the hardware requires PCI register serialisation. 872 * Some of the Owl based MACs require this. 873 */ 874 if (mp_ncpus > 1 && 875 ath_hal_getcapability(ah, HAL_CAP_SERIALISE_WAR, 876 0, NULL) == HAL_OK) { 877 sc->sc_ah->ah_config.ah_serialise_reg_war = 1; 878 device_printf(sc->sc_dev, 879 "Enabling register serialisation\n"); 880 } 881 882 /* 883 * Initialise the deferred completed RX buffer list. 884 */ 885 TAILQ_INIT(&sc->sc_rx_rxlist[HAL_RX_QUEUE_HP]); 886 TAILQ_INIT(&sc->sc_rx_rxlist[HAL_RX_QUEUE_LP]); 887 888 /* 889 * Indicate we need the 802.11 header padded to a 890 * 32-bit boundary for 4-address and QoS frames. 891 */ 892 ic->ic_flags |= IEEE80211_F_DATAPAD; 893 894 /* 895 * Query the hal about antenna support. 896 */ 897 sc->sc_defant = ath_hal_getdefantenna(ah); 898 899 /* 900 * Not all chips have the VEOL support we want to 901 * use with IBSS beacons; check here for it. 902 */ 903 sc->sc_hasveol = ath_hal_hasveol(ah); 904 905 /* get mac address from hardware */ 906 ath_hal_getmac(ah, macaddr); 907 if (sc->sc_hasbmask) 908 ath_hal_getbssidmask(ah, sc->sc_hwbssidmask); 909 910 /* NB: used to size node table key mapping array */ 911 ic->ic_max_keyix = sc->sc_keymax; 912 /* call MI attach routine. */ 913 ieee80211_ifattach(ic, macaddr); 914 ic->ic_setregdomain = ath_setregdomain; 915 ic->ic_getradiocaps = ath_getradiocaps; 916 sc->sc_opmode = HAL_M_STA; 917 918 /* override default methods */ 919 ic->ic_newassoc = ath_newassoc; 920 ic->ic_updateslot = ath_updateslot; 921 ic->ic_wme.wme_update = ath_wme_update; 922 ic->ic_vap_create = ath_vap_create; 923 ic->ic_vap_delete = ath_vap_delete; 924 ic->ic_raw_xmit = ath_raw_xmit; 925 ic->ic_update_mcast = ath_update_mcast; 926 ic->ic_update_promisc = ath_update_promisc; 927 ic->ic_node_alloc = ath_node_alloc; 928 sc->sc_node_free = ic->ic_node_free; 929 ic->ic_node_free = ath_node_free; 930 sc->sc_node_cleanup = ic->ic_node_cleanup; 931 ic->ic_node_cleanup = ath_node_cleanup; 932 ic->ic_node_getsignal = ath_node_getsignal; 933 ic->ic_scan_start = ath_scan_start; 934 ic->ic_scan_end = ath_scan_end; 935 ic->ic_set_channel = ath_set_channel; 936 #ifdef ATH_ENABLE_11N 937 /* 802.11n specific - but just override anyway */ 938 sc->sc_addba_request = ic->ic_addba_request; 939 sc->sc_addba_response = ic->ic_addba_response; 940 sc->sc_addba_stop = ic->ic_addba_stop; 941 sc->sc_bar_response = ic->ic_bar_response; 942 sc->sc_addba_response_timeout = ic->ic_addba_response_timeout; 943 944 ic->ic_addba_request = ath_addba_request; 945 ic->ic_addba_response = ath_addba_response; 946 ic->ic_addba_response_timeout = ath_addba_response_timeout; 947 ic->ic_addba_stop = ath_addba_stop; 948 ic->ic_bar_response = ath_bar_response; 949 950 ic->ic_update_chw = ath_update_chw; 951 #endif /* ATH_ENABLE_11N */ 952 953 #ifdef ATH_ENABLE_RADIOTAP_VENDOR_EXT 954 /* 955 * There's one vendor bitmap entry in the RX radiotap 956 * header; make sure that's taken into account. 957 */ 958 ieee80211_radiotap_attachv(ic, 959 &sc->sc_tx_th.wt_ihdr, sizeof(sc->sc_tx_th), 0, 960 ATH_TX_RADIOTAP_PRESENT, 961 &sc->sc_rx_th.wr_ihdr, sizeof(sc->sc_rx_th), 1, 962 ATH_RX_RADIOTAP_PRESENT); 963 #else 964 /* 965 * No vendor bitmap/extensions are present. 966 */ 967 ieee80211_radiotap_attach(ic, 968 &sc->sc_tx_th.wt_ihdr, sizeof(sc->sc_tx_th), 969 ATH_TX_RADIOTAP_PRESENT, 970 &sc->sc_rx_th.wr_ihdr, sizeof(sc->sc_rx_th), 971 ATH_RX_RADIOTAP_PRESENT); 972 #endif /* ATH_ENABLE_RADIOTAP_VENDOR_EXT */ 973 974 /* 975 * Setup the ALQ logging if required 976 */ 977 #ifdef ATH_DEBUG_ALQ 978 if_ath_alq_init(&sc->sc_alq, device_get_nameunit(sc->sc_dev)); 979 if_ath_alq_setcfg(&sc->sc_alq, 980 sc->sc_ah->ah_macVersion, 981 sc->sc_ah->ah_macRev, 982 sc->sc_ah->ah_phyRev, 983 sc->sc_ah->ah_magic); 984 #endif 985 986 /* 987 * Setup dynamic sysctl's now that country code and 988 * regdomain are available from the hal. 989 */ 990 ath_sysctlattach(sc); 991 ath_sysctl_stats_attach(sc); 992 ath_sysctl_hal_attach(sc); 993 994 if (bootverbose) 995 ieee80211_announce(ic); 996 ath_announce(sc); 997 return 0; 998 bad2: 999 ath_tx_cleanup(sc); 1000 ath_desc_free(sc); 1001 ath_txdma_teardown(sc); 1002 ath_rxdma_teardown(sc); 1003 bad: 1004 if (ah) 1005 ath_hal_detach(ah); 1006 1007 /* 1008 * To work around scoping issues with CURVNET_SET/CURVNET_RESTORE.. 1009 */ 1010 if (ifp != NULL && ifp->if_vnet) { 1011 CURVNET_SET(ifp->if_vnet); 1012 if_free(ifp); 1013 CURVNET_RESTORE(); 1014 } else if (ifp != NULL) 1015 if_free(ifp); 1016 sc->sc_invalid = 1; 1017 return error; 1018 } 1019 1020 int 1021 ath_detach(struct ath_softc *sc) 1022 { 1023 struct ifnet *ifp = sc->sc_ifp; 1024 1025 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 1026 __func__, ifp->if_flags); 1027 1028 /* 1029 * NB: the order of these is important: 1030 * o stop the chip so no more interrupts will fire 1031 * o call the 802.11 layer before detaching the hal to 1032 * insure callbacks into the driver to delete global 1033 * key cache entries can be handled 1034 * o free the taskqueue which drains any pending tasks 1035 * o reclaim the tx queue data structures after calling 1036 * the 802.11 layer as we'll get called back to reclaim 1037 * node state and potentially want to use them 1038 * o to cleanup the tx queues the hal is called, so detach 1039 * it last 1040 * Other than that, it's straightforward... 1041 */ 1042 ath_stop(ifp); 1043 ieee80211_ifdetach(ifp->if_l2com); 1044 taskqueue_free(sc->sc_tq); 1045 #ifdef ATH_TX99_DIAG 1046 if (sc->sc_tx99 != NULL) 1047 sc->sc_tx99->detach(sc->sc_tx99); 1048 #endif 1049 ath_rate_detach(sc->sc_rc); 1050 #ifdef ATH_DEBUG_ALQ 1051 if_ath_alq_tidyup(&sc->sc_alq); 1052 #endif 1053 ath_lna_div_detach(sc); 1054 ath_btcoex_detach(sc); 1055 ath_spectral_detach(sc); 1056 ath_dfs_detach(sc); 1057 ath_desc_free(sc); 1058 ath_txdma_teardown(sc); 1059 ath_rxdma_teardown(sc); 1060 ath_tx_cleanup(sc); 1061 ath_hal_detach(sc->sc_ah); /* NB: sets chip in full sleep */ 1062 1063 CURVNET_SET(ifp->if_vnet); 1064 if_free(ifp); 1065 CURVNET_RESTORE(); 1066 1067 return 0; 1068 } 1069 1070 /* 1071 * MAC address handling for multiple BSS on the same radio. 1072 * The first vap uses the MAC address from the EEPROM. For 1073 * subsequent vap's we set the U/L bit (bit 1) in the MAC 1074 * address and use the next six bits as an index. 1075 */ 1076 static void 1077 assign_address(struct ath_softc *sc, uint8_t mac[IEEE80211_ADDR_LEN], int clone) 1078 { 1079 int i; 1080 1081 if (clone && sc->sc_hasbmask) { 1082 /* NB: we only do this if h/w supports multiple bssid */ 1083 for (i = 0; i < 8; i++) 1084 if ((sc->sc_bssidmask & (1<<i)) == 0) 1085 break; 1086 if (i != 0) 1087 mac[0] |= (i << 2)|0x2; 1088 } else 1089 i = 0; 1090 sc->sc_bssidmask |= 1<<i; 1091 sc->sc_hwbssidmask[0] &= ~mac[0]; 1092 if (i == 0) 1093 sc->sc_nbssid0++; 1094 } 1095 1096 static void 1097 reclaim_address(struct ath_softc *sc, const uint8_t mac[IEEE80211_ADDR_LEN]) 1098 { 1099 int i = mac[0] >> 2; 1100 uint8_t mask; 1101 1102 if (i != 0 || --sc->sc_nbssid0 == 0) { 1103 sc->sc_bssidmask &= ~(1<<i); 1104 /* recalculate bssid mask from remaining addresses */ 1105 mask = 0xff; 1106 for (i = 1; i < 8; i++) 1107 if (sc->sc_bssidmask & (1<<i)) 1108 mask &= ~((i<<2)|0x2); 1109 sc->sc_hwbssidmask[0] |= mask; 1110 } 1111 } 1112 1113 /* 1114 * Assign a beacon xmit slot. We try to space out 1115 * assignments so when beacons are staggered the 1116 * traffic coming out of the cab q has maximal time 1117 * to go out before the next beacon is scheduled. 1118 */ 1119 static int 1120 assign_bslot(struct ath_softc *sc) 1121 { 1122 u_int slot, free; 1123 1124 free = 0; 1125 for (slot = 0; slot < ATH_BCBUF; slot++) 1126 if (sc->sc_bslot[slot] == NULL) { 1127 if (sc->sc_bslot[(slot+1)%ATH_BCBUF] == NULL && 1128 sc->sc_bslot[(slot-1)%ATH_BCBUF] == NULL) 1129 return slot; 1130 free = slot; 1131 /* NB: keep looking for a double slot */ 1132 } 1133 return free; 1134 } 1135 1136 static struct ieee80211vap * 1137 ath_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit, 1138 enum ieee80211_opmode opmode, int flags, 1139 const uint8_t bssid[IEEE80211_ADDR_LEN], 1140 const uint8_t mac0[IEEE80211_ADDR_LEN]) 1141 { 1142 struct ath_softc *sc = ic->ic_ifp->if_softc; 1143 struct ath_vap *avp; 1144 struct ieee80211vap *vap; 1145 uint8_t mac[IEEE80211_ADDR_LEN]; 1146 int needbeacon, error; 1147 enum ieee80211_opmode ic_opmode; 1148 1149 avp = (struct ath_vap *) malloc(sizeof(struct ath_vap), 1150 M_80211_VAP, M_WAITOK | M_ZERO); 1151 needbeacon = 0; 1152 IEEE80211_ADDR_COPY(mac, mac0); 1153 1154 ATH_LOCK(sc); 1155 ic_opmode = opmode; /* default to opmode of new vap */ 1156 switch (opmode) { 1157 case IEEE80211_M_STA: 1158 if (sc->sc_nstavaps != 0) { /* XXX only 1 for now */ 1159 device_printf(sc->sc_dev, "only 1 sta vap supported\n"); 1160 goto bad; 1161 } 1162 if (sc->sc_nvaps) { 1163 /* 1164 * With multiple vaps we must fall back 1165 * to s/w beacon miss handling. 1166 */ 1167 flags |= IEEE80211_CLONE_NOBEACONS; 1168 } 1169 if (flags & IEEE80211_CLONE_NOBEACONS) { 1170 /* 1171 * Station mode w/o beacons are implemented w/ AP mode. 1172 */ 1173 ic_opmode = IEEE80211_M_HOSTAP; 1174 } 1175 break; 1176 case IEEE80211_M_IBSS: 1177 if (sc->sc_nvaps != 0) { /* XXX only 1 for now */ 1178 device_printf(sc->sc_dev, 1179 "only 1 ibss vap supported\n"); 1180 goto bad; 1181 } 1182 needbeacon = 1; 1183 break; 1184 case IEEE80211_M_AHDEMO: 1185 #ifdef IEEE80211_SUPPORT_TDMA 1186 if (flags & IEEE80211_CLONE_TDMA) { 1187 if (sc->sc_nvaps != 0) { 1188 device_printf(sc->sc_dev, 1189 "only 1 tdma vap supported\n"); 1190 goto bad; 1191 } 1192 needbeacon = 1; 1193 flags |= IEEE80211_CLONE_NOBEACONS; 1194 } 1195 /* fall thru... */ 1196 #endif 1197 case IEEE80211_M_MONITOR: 1198 if (sc->sc_nvaps != 0 && ic->ic_opmode != opmode) { 1199 /* 1200 * Adopt existing mode. Adding a monitor or ahdemo 1201 * vap to an existing configuration is of dubious 1202 * value but should be ok. 1203 */ 1204 /* XXX not right for monitor mode */ 1205 ic_opmode = ic->ic_opmode; 1206 } 1207 break; 1208 case IEEE80211_M_HOSTAP: 1209 case IEEE80211_M_MBSS: 1210 needbeacon = 1; 1211 break; 1212 case IEEE80211_M_WDS: 1213 if (sc->sc_nvaps != 0 && ic->ic_opmode == IEEE80211_M_STA) { 1214 device_printf(sc->sc_dev, 1215 "wds not supported in sta mode\n"); 1216 goto bad; 1217 } 1218 /* 1219 * Silently remove any request for a unique 1220 * bssid; WDS vap's always share the local 1221 * mac address. 1222 */ 1223 flags &= ~IEEE80211_CLONE_BSSID; 1224 if (sc->sc_nvaps == 0) 1225 ic_opmode = IEEE80211_M_HOSTAP; 1226 else 1227 ic_opmode = ic->ic_opmode; 1228 break; 1229 default: 1230 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode); 1231 goto bad; 1232 } 1233 /* 1234 * Check that a beacon buffer is available; the code below assumes it. 1235 */ 1236 if (needbeacon & TAILQ_EMPTY(&sc->sc_bbuf)) { 1237 device_printf(sc->sc_dev, "no beacon buffer available\n"); 1238 goto bad; 1239 } 1240 1241 /* STA, AHDEMO? */ 1242 if (opmode == IEEE80211_M_HOSTAP || opmode == IEEE80211_M_MBSS) { 1243 assign_address(sc, mac, flags & IEEE80211_CLONE_BSSID); 1244 ath_hal_setbssidmask(sc->sc_ah, sc->sc_hwbssidmask); 1245 } 1246 1247 vap = &avp->av_vap; 1248 /* XXX can't hold mutex across if_alloc */ 1249 ATH_UNLOCK(sc); 1250 error = ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, 1251 bssid, mac); 1252 ATH_LOCK(sc); 1253 if (error != 0) { 1254 device_printf(sc->sc_dev, "%s: error %d creating vap\n", 1255 __func__, error); 1256 goto bad2; 1257 } 1258 1259 /* h/w crypto support */ 1260 vap->iv_key_alloc = ath_key_alloc; 1261 vap->iv_key_delete = ath_key_delete; 1262 vap->iv_key_set = ath_key_set; 1263 vap->iv_key_update_begin = ath_key_update_begin; 1264 vap->iv_key_update_end = ath_key_update_end; 1265 1266 /* override various methods */ 1267 avp->av_recv_mgmt = vap->iv_recv_mgmt; 1268 vap->iv_recv_mgmt = ath_recv_mgmt; 1269 vap->iv_reset = ath_reset_vap; 1270 vap->iv_update_beacon = ath_beacon_update; 1271 avp->av_newstate = vap->iv_newstate; 1272 vap->iv_newstate = ath_newstate; 1273 avp->av_bmiss = vap->iv_bmiss; 1274 vap->iv_bmiss = ath_bmiss_vap; 1275 1276 avp->av_node_ps = vap->iv_node_ps; 1277 vap->iv_node_ps = ath_node_powersave; 1278 1279 avp->av_set_tim = vap->iv_set_tim; 1280 vap->iv_set_tim = ath_node_set_tim; 1281 1282 avp->av_recv_pspoll = vap->iv_recv_pspoll; 1283 vap->iv_recv_pspoll = ath_node_recv_pspoll; 1284 1285 /* Set default parameters */ 1286 1287 /* 1288 * Anything earlier than some AR9300 series MACs don't 1289 * support a smaller MPDU density. 1290 */ 1291 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_8; 1292 /* 1293 * All NICs can handle the maximum size, however 1294 * AR5416 based MACs can only TX aggregates w/ RTS 1295 * protection when the total aggregate size is <= 8k. 1296 * However, for now that's enforced by the TX path. 1297 */ 1298 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_64K; 1299 1300 avp->av_bslot = -1; 1301 if (needbeacon) { 1302 /* 1303 * Allocate beacon state and setup the q for buffered 1304 * multicast frames. We know a beacon buffer is 1305 * available because we checked above. 1306 */ 1307 avp->av_bcbuf = TAILQ_FIRST(&sc->sc_bbuf); 1308 TAILQ_REMOVE(&sc->sc_bbuf, avp->av_bcbuf, bf_list); 1309 if (opmode != IEEE80211_M_IBSS || !sc->sc_hasveol) { 1310 /* 1311 * Assign the vap to a beacon xmit slot. As above 1312 * this cannot fail to find a free one. 1313 */ 1314 avp->av_bslot = assign_bslot(sc); 1315 KASSERT(sc->sc_bslot[avp->av_bslot] == NULL, 1316 ("beacon slot %u not empty", avp->av_bslot)); 1317 sc->sc_bslot[avp->av_bslot] = vap; 1318 sc->sc_nbcnvaps++; 1319 } 1320 if (sc->sc_hastsfadd && sc->sc_nbcnvaps > 0) { 1321 /* 1322 * Multple vaps are to transmit beacons and we 1323 * have h/w support for TSF adjusting; enable 1324 * use of staggered beacons. 1325 */ 1326 sc->sc_stagbeacons = 1; 1327 } 1328 ath_txq_init(sc, &avp->av_mcastq, ATH_TXQ_SWQ); 1329 } 1330 1331 ic->ic_opmode = ic_opmode; 1332 if (opmode != IEEE80211_M_WDS) { 1333 sc->sc_nvaps++; 1334 if (opmode == IEEE80211_M_STA) 1335 sc->sc_nstavaps++; 1336 if (opmode == IEEE80211_M_MBSS) 1337 sc->sc_nmeshvaps++; 1338 } 1339 switch (ic_opmode) { 1340 case IEEE80211_M_IBSS: 1341 sc->sc_opmode = HAL_M_IBSS; 1342 break; 1343 case IEEE80211_M_STA: 1344 sc->sc_opmode = HAL_M_STA; 1345 break; 1346 case IEEE80211_M_AHDEMO: 1347 #ifdef IEEE80211_SUPPORT_TDMA 1348 if (vap->iv_caps & IEEE80211_C_TDMA) { 1349 sc->sc_tdma = 1; 1350 /* NB: disable tsf adjust */ 1351 sc->sc_stagbeacons = 0; 1352 } 1353 /* 1354 * NB: adhoc demo mode is a pseudo mode; to the hal it's 1355 * just ap mode. 1356 */ 1357 /* fall thru... */ 1358 #endif 1359 case IEEE80211_M_HOSTAP: 1360 case IEEE80211_M_MBSS: 1361 sc->sc_opmode = HAL_M_HOSTAP; 1362 break; 1363 case IEEE80211_M_MONITOR: 1364 sc->sc_opmode = HAL_M_MONITOR; 1365 break; 1366 default: 1367 /* XXX should not happen */ 1368 break; 1369 } 1370 if (sc->sc_hastsfadd) { 1371 /* 1372 * Configure whether or not TSF adjust should be done. 1373 */ 1374 ath_hal_settsfadjust(sc->sc_ah, sc->sc_stagbeacons); 1375 } 1376 if (flags & IEEE80211_CLONE_NOBEACONS) { 1377 /* 1378 * Enable s/w beacon miss handling. 1379 */ 1380 sc->sc_swbmiss = 1; 1381 } 1382 ATH_UNLOCK(sc); 1383 1384 /* complete setup */ 1385 ieee80211_vap_attach(vap, ath_media_change, ieee80211_media_status); 1386 return vap; 1387 bad2: 1388 reclaim_address(sc, mac); 1389 ath_hal_setbssidmask(sc->sc_ah, sc->sc_hwbssidmask); 1390 bad: 1391 free(avp, M_80211_VAP); 1392 ATH_UNLOCK(sc); 1393 return NULL; 1394 } 1395 1396 static void 1397 ath_vap_delete(struct ieee80211vap *vap) 1398 { 1399 struct ieee80211com *ic = vap->iv_ic; 1400 struct ifnet *ifp = ic->ic_ifp; 1401 struct ath_softc *sc = ifp->if_softc; 1402 struct ath_hal *ah = sc->sc_ah; 1403 struct ath_vap *avp = ATH_VAP(vap); 1404 1405 DPRINTF(sc, ATH_DEBUG_RESET, "%s: called\n", __func__); 1406 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1407 /* 1408 * Quiesce the hardware while we remove the vap. In 1409 * particular we need to reclaim all references to 1410 * the vap state by any frames pending on the tx queues. 1411 */ 1412 ath_hal_intrset(ah, 0); /* disable interrupts */ 1413 ath_draintxq(sc, ATH_RESET_DEFAULT); /* stop hw xmit side */ 1414 /* XXX Do all frames from all vaps/nodes need draining here? */ 1415 ath_stoprecv(sc, 1); /* stop recv side */ 1416 } 1417 1418 ieee80211_vap_detach(vap); 1419 1420 /* 1421 * XXX Danger Will Robinson! Danger! 1422 * 1423 * Because ieee80211_vap_detach() can queue a frame (the station 1424 * diassociate message?) after we've drained the TXQ and 1425 * flushed the software TXQ, we will end up with a frame queued 1426 * to a node whose vap is about to be freed. 1427 * 1428 * To work around this, flush the hardware/software again. 1429 * This may be racy - the ath task may be running and the packet 1430 * may be being scheduled between sw->hw txq. Tsk. 1431 * 1432 * TODO: figure out why a new node gets allocated somewhere around 1433 * here (after the ath_tx_swq() call; and after an ath_stop_locked() 1434 * call!) 1435 */ 1436 1437 ath_draintxq(sc, ATH_RESET_DEFAULT); 1438 1439 ATH_LOCK(sc); 1440 /* 1441 * Reclaim beacon state. Note this must be done before 1442 * the vap instance is reclaimed as we may have a reference 1443 * to it in the buffer for the beacon frame. 1444 */ 1445 if (avp->av_bcbuf != NULL) { 1446 if (avp->av_bslot != -1) { 1447 sc->sc_bslot[avp->av_bslot] = NULL; 1448 sc->sc_nbcnvaps--; 1449 } 1450 ath_beacon_return(sc, avp->av_bcbuf); 1451 avp->av_bcbuf = NULL; 1452 if (sc->sc_nbcnvaps == 0) { 1453 sc->sc_stagbeacons = 0; 1454 if (sc->sc_hastsfadd) 1455 ath_hal_settsfadjust(sc->sc_ah, 0); 1456 } 1457 /* 1458 * Reclaim any pending mcast frames for the vap. 1459 */ 1460 ath_tx_draintxq(sc, &avp->av_mcastq); 1461 } 1462 /* 1463 * Update bookkeeping. 1464 */ 1465 if (vap->iv_opmode == IEEE80211_M_STA) { 1466 sc->sc_nstavaps--; 1467 if (sc->sc_nstavaps == 0 && sc->sc_swbmiss) 1468 sc->sc_swbmiss = 0; 1469 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1470 vap->iv_opmode == IEEE80211_M_MBSS) { 1471 reclaim_address(sc, vap->iv_myaddr); 1472 ath_hal_setbssidmask(ah, sc->sc_hwbssidmask); 1473 if (vap->iv_opmode == IEEE80211_M_MBSS) 1474 sc->sc_nmeshvaps--; 1475 } 1476 if (vap->iv_opmode != IEEE80211_M_WDS) 1477 sc->sc_nvaps--; 1478 #ifdef IEEE80211_SUPPORT_TDMA 1479 /* TDMA operation ceases when the last vap is destroyed */ 1480 if (sc->sc_tdma && sc->sc_nvaps == 0) { 1481 sc->sc_tdma = 0; 1482 sc->sc_swbmiss = 0; 1483 } 1484 #endif 1485 free(avp, M_80211_VAP); 1486 1487 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1488 /* 1489 * Restart rx+tx machines if still running (RUNNING will 1490 * be reset if we just destroyed the last vap). 1491 */ 1492 if (ath_startrecv(sc) != 0) 1493 if_printf(ifp, "%s: unable to restart recv logic\n", 1494 __func__); 1495 if (sc->sc_beacons) { /* restart beacons */ 1496 #ifdef IEEE80211_SUPPORT_TDMA 1497 if (sc->sc_tdma) 1498 ath_tdma_config(sc, NULL); 1499 else 1500 #endif 1501 ath_beacon_config(sc, NULL); 1502 } 1503 ath_hal_intrset(ah, sc->sc_imask); 1504 } 1505 ATH_UNLOCK(sc); 1506 } 1507 1508 void 1509 ath_suspend(struct ath_softc *sc) 1510 { 1511 struct ifnet *ifp = sc->sc_ifp; 1512 struct ieee80211com *ic = ifp->if_l2com; 1513 1514 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 1515 __func__, ifp->if_flags); 1516 1517 sc->sc_resume_up = (ifp->if_flags & IFF_UP) != 0; 1518 1519 ieee80211_suspend_all(ic); 1520 /* 1521 * NB: don't worry about putting the chip in low power 1522 * mode; pci will power off our socket on suspend and 1523 * CardBus detaches the device. 1524 */ 1525 1526 /* 1527 * XXX ensure none of the taskqueues are running 1528 * XXX ensure sc_invalid is 1 1529 * XXX ensure the calibration callout is disabled 1530 */ 1531 1532 /* Disable the PCIe PHY, complete with workarounds */ 1533 ath_hal_enablepcie(sc->sc_ah, 1, 1); 1534 } 1535 1536 /* 1537 * Reset the key cache since some parts do not reset the 1538 * contents on resume. First we clear all entries, then 1539 * re-load keys that the 802.11 layer assumes are setup 1540 * in h/w. 1541 */ 1542 static void 1543 ath_reset_keycache(struct ath_softc *sc) 1544 { 1545 struct ifnet *ifp = sc->sc_ifp; 1546 struct ieee80211com *ic = ifp->if_l2com; 1547 struct ath_hal *ah = sc->sc_ah; 1548 int i; 1549 1550 for (i = 0; i < sc->sc_keymax; i++) 1551 ath_hal_keyreset(ah, i); 1552 ieee80211_crypto_reload_keys(ic); 1553 } 1554 1555 /* 1556 * Fetch the current chainmask configuration based on the current 1557 * operating channel and options. 1558 */ 1559 static void 1560 ath_update_chainmasks(struct ath_softc *sc, struct ieee80211_channel *chan) 1561 { 1562 1563 /* 1564 * Set TX chainmask to the currently configured chainmask; 1565 * the TX chainmask depends upon the current operating mode. 1566 */ 1567 sc->sc_cur_rxchainmask = sc->sc_rxchainmask; 1568 if (IEEE80211_IS_CHAN_HT(chan)) { 1569 sc->sc_cur_txchainmask = sc->sc_txchainmask; 1570 } else { 1571 sc->sc_cur_txchainmask = 1; 1572 } 1573 1574 DPRINTF(sc, ATH_DEBUG_RESET, 1575 "%s: TX chainmask is now 0x%x, RX is now 0x%x\n", 1576 __func__, 1577 sc->sc_cur_txchainmask, 1578 sc->sc_cur_rxchainmask); 1579 } 1580 1581 void 1582 ath_resume(struct ath_softc *sc) 1583 { 1584 struct ifnet *ifp = sc->sc_ifp; 1585 struct ieee80211com *ic = ifp->if_l2com; 1586 struct ath_hal *ah = sc->sc_ah; 1587 HAL_STATUS status; 1588 1589 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 1590 __func__, ifp->if_flags); 1591 1592 /* Re-enable PCIe, re-enable the PCIe bus */ 1593 ath_hal_enablepcie(ah, 0, 0); 1594 1595 /* 1596 * Must reset the chip before we reload the 1597 * keycache as we were powered down on suspend. 1598 */ 1599 ath_update_chainmasks(sc, 1600 sc->sc_curchan != NULL ? sc->sc_curchan : ic->ic_curchan); 1601 ath_hal_setchainmasks(sc->sc_ah, sc->sc_cur_txchainmask, 1602 sc->sc_cur_rxchainmask); 1603 ath_hal_reset(ah, sc->sc_opmode, 1604 sc->sc_curchan != NULL ? sc->sc_curchan : ic->ic_curchan, 1605 AH_FALSE, &status); 1606 ath_reset_keycache(sc); 1607 1608 /* Let DFS at it in case it's a DFS channel */ 1609 ath_dfs_radar_enable(sc, ic->ic_curchan); 1610 1611 /* Let spectral at in case spectral is enabled */ 1612 ath_spectral_enable(sc, ic->ic_curchan); 1613 1614 /* 1615 * Let bluetooth coexistence at in case it's needed for this channel 1616 */ 1617 ath_btcoex_enable(sc, ic->ic_curchan); 1618 1619 /* 1620 * If we're doing TDMA, enforce the TXOP limitation for chips that 1621 * support it. 1622 */ 1623 if (sc->sc_hasenforcetxop && sc->sc_tdma) 1624 ath_hal_setenforcetxop(sc->sc_ah, 1); 1625 else 1626 ath_hal_setenforcetxop(sc->sc_ah, 0); 1627 1628 /* Restore the LED configuration */ 1629 ath_led_config(sc); 1630 ath_hal_setledstate(ah, HAL_LED_INIT); 1631 1632 if (sc->sc_resume_up) 1633 ieee80211_resume_all(ic); 1634 1635 /* XXX beacons ? */ 1636 } 1637 1638 void 1639 ath_shutdown(struct ath_softc *sc) 1640 { 1641 struct ifnet *ifp = sc->sc_ifp; 1642 1643 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 1644 __func__, ifp->if_flags); 1645 1646 ath_stop(ifp); 1647 /* NB: no point powering down chip as we're about to reboot */ 1648 } 1649 1650 /* 1651 * Interrupt handler. Most of the actual processing is deferred. 1652 */ 1653 void 1654 ath_intr(void *arg) 1655 { 1656 struct ath_softc *sc = arg; 1657 struct ifnet *ifp = sc->sc_ifp; 1658 struct ath_hal *ah = sc->sc_ah; 1659 HAL_INT status = 0; 1660 uint32_t txqs; 1661 1662 /* 1663 * If we're inside a reset path, just print a warning and 1664 * clear the ISR. The reset routine will finish it for us. 1665 */ 1666 ATH_PCU_LOCK(sc); 1667 if (sc->sc_inreset_cnt) { 1668 HAL_INT status; 1669 ath_hal_getisr(ah, &status); /* clear ISR */ 1670 ath_hal_intrset(ah, 0); /* disable further intr's */ 1671 DPRINTF(sc, ATH_DEBUG_ANY, 1672 "%s: in reset, ignoring: status=0x%x\n", 1673 __func__, status); 1674 ATH_PCU_UNLOCK(sc); 1675 return; 1676 } 1677 1678 if (sc->sc_invalid) { 1679 /* 1680 * The hardware is not ready/present, don't touch anything. 1681 * Note this can happen early on if the IRQ is shared. 1682 */ 1683 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid; ignored\n", __func__); 1684 ATH_PCU_UNLOCK(sc); 1685 return; 1686 } 1687 if (!ath_hal_intrpend(ah)) { /* shared irq, not for us */ 1688 ATH_PCU_UNLOCK(sc); 1689 return; 1690 } 1691 1692 if ((ifp->if_flags & IFF_UP) == 0 || 1693 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1694 HAL_INT status; 1695 1696 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 1697 __func__, ifp->if_flags); 1698 ath_hal_getisr(ah, &status); /* clear ISR */ 1699 ath_hal_intrset(ah, 0); /* disable further intr's */ 1700 ATH_PCU_UNLOCK(sc); 1701 return; 1702 } 1703 1704 /* 1705 * Figure out the reason(s) for the interrupt. Note 1706 * that the hal returns a pseudo-ISR that may include 1707 * bits we haven't explicitly enabled so we mask the 1708 * value to insure we only process bits we requested. 1709 */ 1710 ath_hal_getisr(ah, &status); /* NB: clears ISR too */ 1711 DPRINTF(sc, ATH_DEBUG_INTR, "%s: status 0x%x\n", __func__, status); 1712 ATH_KTR(sc, ATH_KTR_INTERRUPTS, 1, "ath_intr: mask=0x%.8x", status); 1713 #ifdef ATH_DEBUG_ALQ 1714 if_ath_alq_post_intr(&sc->sc_alq, status, ah->ah_intrstate, 1715 ah->ah_syncstate); 1716 #endif /* ATH_DEBUG_ALQ */ 1717 #ifdef ATH_KTR_INTR_DEBUG 1718 ATH_KTR(sc, ATH_KTR_INTERRUPTS, 5, 1719 "ath_intr: ISR=0x%.8x, ISR_S0=0x%.8x, ISR_S1=0x%.8x, ISR_S2=0x%.8x, ISR_S5=0x%.8x", 1720 ah->ah_intrstate[0], 1721 ah->ah_intrstate[1], 1722 ah->ah_intrstate[2], 1723 ah->ah_intrstate[3], 1724 ah->ah_intrstate[6]); 1725 #endif 1726 1727 /* Squirrel away SYNC interrupt debugging */ 1728 if (ah->ah_syncstate != 0) { 1729 int i; 1730 for (i = 0; i < 32; i++) 1731 if (ah->ah_syncstate & (i << i)) 1732 sc->sc_intr_stats.sync_intr[i]++; 1733 } 1734 1735 status &= sc->sc_imask; /* discard unasked for bits */ 1736 1737 /* Short-circuit un-handled interrupts */ 1738 if (status == 0x0) { 1739 ATH_PCU_UNLOCK(sc); 1740 return; 1741 } 1742 1743 /* 1744 * Take a note that we're inside the interrupt handler, so 1745 * the reset routines know to wait. 1746 */ 1747 sc->sc_intr_cnt++; 1748 ATH_PCU_UNLOCK(sc); 1749 1750 /* 1751 * Handle the interrupt. We won't run concurrent with the reset 1752 * or channel change routines as they'll wait for sc_intr_cnt 1753 * to be 0 before continuing. 1754 */ 1755 if (status & HAL_INT_FATAL) { 1756 sc->sc_stats.ast_hardware++; 1757 ath_hal_intrset(ah, 0); /* disable intr's until reset */ 1758 taskqueue_enqueue(sc->sc_tq, &sc->sc_fataltask); 1759 } else { 1760 if (status & HAL_INT_SWBA) { 1761 /* 1762 * Software beacon alert--time to send a beacon. 1763 * Handle beacon transmission directly; deferring 1764 * this is too slow to meet timing constraints 1765 * under load. 1766 */ 1767 #ifdef IEEE80211_SUPPORT_TDMA 1768 if (sc->sc_tdma) { 1769 if (sc->sc_tdmaswba == 0) { 1770 struct ieee80211com *ic = ifp->if_l2com; 1771 struct ieee80211vap *vap = 1772 TAILQ_FIRST(&ic->ic_vaps); 1773 ath_tdma_beacon_send(sc, vap); 1774 sc->sc_tdmaswba = 1775 vap->iv_tdma->tdma_bintval; 1776 } else 1777 sc->sc_tdmaswba--; 1778 } else 1779 #endif 1780 { 1781 ath_beacon_proc(sc, 0); 1782 #ifdef IEEE80211_SUPPORT_SUPERG 1783 /* 1784 * Schedule the rx taskq in case there's no 1785 * traffic so any frames held on the staging 1786 * queue are aged and potentially flushed. 1787 */ 1788 sc->sc_rx.recv_sched(sc, 1); 1789 #endif 1790 } 1791 } 1792 if (status & HAL_INT_RXEOL) { 1793 int imask; 1794 ATH_KTR(sc, ATH_KTR_ERROR, 0, "ath_intr: RXEOL"); 1795 ATH_PCU_LOCK(sc); 1796 /* 1797 * NB: the hardware should re-read the link when 1798 * RXE bit is written, but it doesn't work at 1799 * least on older hardware revs. 1800 */ 1801 sc->sc_stats.ast_rxeol++; 1802 /* 1803 * Disable RXEOL/RXORN - prevent an interrupt 1804 * storm until the PCU logic can be reset. 1805 * In case the interface is reset some other 1806 * way before "sc_kickpcu" is called, don't 1807 * modify sc_imask - that way if it is reset 1808 * by a call to ath_reset() somehow, the 1809 * interrupt mask will be correctly reprogrammed. 1810 */ 1811 imask = sc->sc_imask; 1812 imask &= ~(HAL_INT_RXEOL | HAL_INT_RXORN); 1813 ath_hal_intrset(ah, imask); 1814 /* 1815 * Only blank sc_rxlink if we've not yet kicked 1816 * the PCU. 1817 * 1818 * This isn't entirely correct - the correct solution 1819 * would be to have a PCU lock and engage that for 1820 * the duration of the PCU fiddling; which would include 1821 * running the RX process. Otherwise we could end up 1822 * messing up the RX descriptor chain and making the 1823 * RX desc list much shorter. 1824 */ 1825 if (! sc->sc_kickpcu) 1826 sc->sc_rxlink = NULL; 1827 sc->sc_kickpcu = 1; 1828 ATH_PCU_UNLOCK(sc); 1829 /* 1830 * Enqueue an RX proc, to handled whatever 1831 * is in the RX queue. 1832 * This will then kick the PCU. 1833 */ 1834 sc->sc_rx.recv_sched(sc, 1); 1835 } 1836 if (status & HAL_INT_TXURN) { 1837 sc->sc_stats.ast_txurn++; 1838 /* bump tx trigger level */ 1839 ath_hal_updatetxtriglevel(ah, AH_TRUE); 1840 } 1841 /* 1842 * Handle both the legacy and RX EDMA interrupt bits. 1843 * Note that HAL_INT_RXLP is also HAL_INT_RXDESC. 1844 */ 1845 if (status & (HAL_INT_RX | HAL_INT_RXHP | HAL_INT_RXLP)) { 1846 sc->sc_stats.ast_rx_intr++; 1847 sc->sc_rx.recv_sched(sc, 1); 1848 } 1849 if (status & HAL_INT_TX) { 1850 sc->sc_stats.ast_tx_intr++; 1851 /* 1852 * Grab all the currently set bits in the HAL txq bitmap 1853 * and blank them. This is the only place we should be 1854 * doing this. 1855 */ 1856 if (! sc->sc_isedma) { 1857 ATH_PCU_LOCK(sc); 1858 txqs = 0xffffffff; 1859 ath_hal_gettxintrtxqs(sc->sc_ah, &txqs); 1860 ATH_KTR(sc, ATH_KTR_INTERRUPTS, 3, 1861 "ath_intr: TX; txqs=0x%08x, txq_active was 0x%08x, now 0x%08x", 1862 txqs, 1863 sc->sc_txq_active, 1864 sc->sc_txq_active | txqs); 1865 sc->sc_txq_active |= txqs; 1866 ATH_PCU_UNLOCK(sc); 1867 } 1868 taskqueue_enqueue(sc->sc_tq, &sc->sc_txtask); 1869 } 1870 if (status & HAL_INT_BMISS) { 1871 sc->sc_stats.ast_bmiss++; 1872 taskqueue_enqueue(sc->sc_tq, &sc->sc_bmisstask); 1873 } 1874 if (status & HAL_INT_GTT) 1875 sc->sc_stats.ast_tx_timeout++; 1876 if (status & HAL_INT_CST) 1877 sc->sc_stats.ast_tx_cst++; 1878 if (status & HAL_INT_MIB) { 1879 sc->sc_stats.ast_mib++; 1880 ATH_PCU_LOCK(sc); 1881 /* 1882 * Disable interrupts until we service the MIB 1883 * interrupt; otherwise it will continue to fire. 1884 */ 1885 ath_hal_intrset(ah, 0); 1886 /* 1887 * Let the hal handle the event. We assume it will 1888 * clear whatever condition caused the interrupt. 1889 */ 1890 ath_hal_mibevent(ah, &sc->sc_halstats); 1891 /* 1892 * Don't reset the interrupt if we've just 1893 * kicked the PCU, or we may get a nested 1894 * RXEOL before the rxproc has had a chance 1895 * to run. 1896 */ 1897 if (sc->sc_kickpcu == 0) 1898 ath_hal_intrset(ah, sc->sc_imask); 1899 ATH_PCU_UNLOCK(sc); 1900 } 1901 if (status & HAL_INT_RXORN) { 1902 /* NB: hal marks HAL_INT_FATAL when RXORN is fatal */ 1903 ATH_KTR(sc, ATH_KTR_ERROR, 0, "ath_intr: RXORN"); 1904 sc->sc_stats.ast_rxorn++; 1905 } 1906 } 1907 ATH_PCU_LOCK(sc); 1908 sc->sc_intr_cnt--; 1909 ATH_PCU_UNLOCK(sc); 1910 } 1911 1912 static void 1913 ath_fatal_proc(void *arg, int pending) 1914 { 1915 struct ath_softc *sc = arg; 1916 struct ifnet *ifp = sc->sc_ifp; 1917 u_int32_t *state; 1918 u_int32_t len; 1919 void *sp; 1920 1921 if_printf(ifp, "hardware error; resetting\n"); 1922 /* 1923 * Fatal errors are unrecoverable. Typically these 1924 * are caused by DMA errors. Collect h/w state from 1925 * the hal so we can diagnose what's going on. 1926 */ 1927 if (ath_hal_getfatalstate(sc->sc_ah, &sp, &len)) { 1928 KASSERT(len >= 6*sizeof(u_int32_t), ("len %u bytes", len)); 1929 state = sp; 1930 if_printf(ifp, "0x%08x 0x%08x 0x%08x, 0x%08x 0x%08x 0x%08x\n", 1931 state[0], state[1] , state[2], state[3], 1932 state[4], state[5]); 1933 } 1934 ath_reset(ifp, ATH_RESET_NOLOSS); 1935 } 1936 1937 static void 1938 ath_bmiss_vap(struct ieee80211vap *vap) 1939 { 1940 /* 1941 * Workaround phantom bmiss interrupts by sanity-checking 1942 * the time of our last rx'd frame. If it is within the 1943 * beacon miss interval then ignore the interrupt. If it's 1944 * truly a bmiss we'll get another interrupt soon and that'll 1945 * be dispatched up for processing. Note this applies only 1946 * for h/w beacon miss events. 1947 */ 1948 if ((vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) == 0) { 1949 struct ifnet *ifp = vap->iv_ic->ic_ifp; 1950 struct ath_softc *sc = ifp->if_softc; 1951 u_int64_t lastrx = sc->sc_lastrx; 1952 u_int64_t tsf = ath_hal_gettsf64(sc->sc_ah); 1953 /* XXX should take a locked ref to iv_bss */ 1954 u_int bmisstimeout = 1955 vap->iv_bmissthreshold * vap->iv_bss->ni_intval * 1024; 1956 1957 DPRINTF(sc, ATH_DEBUG_BEACON, 1958 "%s: tsf %llu lastrx %lld (%llu) bmiss %u\n", 1959 __func__, (unsigned long long) tsf, 1960 (unsigned long long)(tsf - lastrx), 1961 (unsigned long long) lastrx, bmisstimeout); 1962 1963 if (tsf - lastrx <= bmisstimeout) { 1964 sc->sc_stats.ast_bmiss_phantom++; 1965 return; 1966 } 1967 } 1968 ATH_VAP(vap)->av_bmiss(vap); 1969 } 1970 1971 int 1972 ath_hal_gethangstate(struct ath_hal *ah, uint32_t mask, uint32_t *hangs) 1973 { 1974 uint32_t rsize; 1975 void *sp; 1976 1977 if (!ath_hal_getdiagstate(ah, HAL_DIAG_CHECK_HANGS, &mask, sizeof(mask), &sp, &rsize)) 1978 return 0; 1979 KASSERT(rsize == sizeof(uint32_t), ("resultsize %u", rsize)); 1980 *hangs = *(uint32_t *)sp; 1981 return 1; 1982 } 1983 1984 static void 1985 ath_bmiss_proc(void *arg, int pending) 1986 { 1987 struct ath_softc *sc = arg; 1988 struct ifnet *ifp = sc->sc_ifp; 1989 uint32_t hangs; 1990 1991 DPRINTF(sc, ATH_DEBUG_ANY, "%s: pending %u\n", __func__, pending); 1992 1993 /* 1994 * Do a reset upon any becaon miss event. 1995 * 1996 * It may be a non-recognised RX clear hang which needs a reset 1997 * to clear. 1998 */ 1999 if (ath_hal_gethangstate(sc->sc_ah, 0xff, &hangs) && hangs != 0) { 2000 ath_reset(ifp, ATH_RESET_NOLOSS); 2001 if_printf(ifp, "bb hang detected (0x%x), resetting\n", hangs); 2002 } else { 2003 ath_reset(ifp, ATH_RESET_NOLOSS); 2004 ieee80211_beacon_miss(ifp->if_l2com); 2005 } 2006 } 2007 2008 /* 2009 * Handle TKIP MIC setup to deal hardware that doesn't do MIC 2010 * calcs together with WME. If necessary disable the crypto 2011 * hardware and mark the 802.11 state so keys will be setup 2012 * with the MIC work done in software. 2013 */ 2014 static void 2015 ath_settkipmic(struct ath_softc *sc) 2016 { 2017 struct ifnet *ifp = sc->sc_ifp; 2018 struct ieee80211com *ic = ifp->if_l2com; 2019 2020 if ((ic->ic_cryptocaps & IEEE80211_CRYPTO_TKIP) && !sc->sc_wmetkipmic) { 2021 if (ic->ic_flags & IEEE80211_F_WME) { 2022 ath_hal_settkipmic(sc->sc_ah, AH_FALSE); 2023 ic->ic_cryptocaps &= ~IEEE80211_CRYPTO_TKIPMIC; 2024 } else { 2025 ath_hal_settkipmic(sc->sc_ah, AH_TRUE); 2026 ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIPMIC; 2027 } 2028 } 2029 } 2030 2031 static void 2032 ath_init(void *arg) 2033 { 2034 struct ath_softc *sc = (struct ath_softc *) arg; 2035 struct ifnet *ifp = sc->sc_ifp; 2036 struct ieee80211com *ic = ifp->if_l2com; 2037 struct ath_hal *ah = sc->sc_ah; 2038 HAL_STATUS status; 2039 2040 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 2041 __func__, ifp->if_flags); 2042 2043 ATH_LOCK(sc); 2044 /* 2045 * Stop anything previously setup. This is safe 2046 * whether this is the first time through or not. 2047 */ 2048 ath_stop_locked(ifp); 2049 2050 /* 2051 * The basic interface to setting the hardware in a good 2052 * state is ``reset''. On return the hardware is known to 2053 * be powered up and with interrupts disabled. This must 2054 * be followed by initialization of the appropriate bits 2055 * and then setup of the interrupt mask. 2056 */ 2057 ath_settkipmic(sc); 2058 ath_update_chainmasks(sc, ic->ic_curchan); 2059 ath_hal_setchainmasks(sc->sc_ah, sc->sc_cur_txchainmask, 2060 sc->sc_cur_rxchainmask); 2061 if (!ath_hal_reset(ah, sc->sc_opmode, ic->ic_curchan, AH_FALSE, &status)) { 2062 if_printf(ifp, "unable to reset hardware; hal status %u\n", 2063 status); 2064 ATH_UNLOCK(sc); 2065 return; 2066 } 2067 ath_chan_change(sc, ic->ic_curchan); 2068 2069 /* Let DFS at it in case it's a DFS channel */ 2070 ath_dfs_radar_enable(sc, ic->ic_curchan); 2071 2072 /* Let spectral at in case spectral is enabled */ 2073 ath_spectral_enable(sc, ic->ic_curchan); 2074 2075 /* 2076 * Let bluetooth coexistence at in case it's needed for this channel 2077 */ 2078 ath_btcoex_enable(sc, ic->ic_curchan); 2079 2080 /* 2081 * If we're doing TDMA, enforce the TXOP limitation for chips that 2082 * support it. 2083 */ 2084 if (sc->sc_hasenforcetxop && sc->sc_tdma) 2085 ath_hal_setenforcetxop(sc->sc_ah, 1); 2086 else 2087 ath_hal_setenforcetxop(sc->sc_ah, 0); 2088 2089 /* 2090 * Likewise this is set during reset so update 2091 * state cached in the driver. 2092 */ 2093 sc->sc_diversity = ath_hal_getdiversity(ah); 2094 sc->sc_lastlongcal = 0; 2095 sc->sc_resetcal = 1; 2096 sc->sc_lastcalreset = 0; 2097 sc->sc_lastani = 0; 2098 sc->sc_lastshortcal = 0; 2099 sc->sc_doresetcal = AH_FALSE; 2100 /* 2101 * Beacon timers were cleared here; give ath_newstate() 2102 * a hint that the beacon timers should be poked when 2103 * things transition to the RUN state. 2104 */ 2105 sc->sc_beacons = 0; 2106 2107 /* 2108 * Setup the hardware after reset: the key cache 2109 * is filled as needed and the receive engine is 2110 * set going. Frame transmit is handled entirely 2111 * in the frame output path; there's nothing to do 2112 * here except setup the interrupt mask. 2113 */ 2114 if (ath_startrecv(sc) != 0) { 2115 if_printf(ifp, "unable to start recv logic\n"); 2116 ATH_UNLOCK(sc); 2117 return; 2118 } 2119 2120 /* 2121 * Enable interrupts. 2122 */ 2123 sc->sc_imask = HAL_INT_RX | HAL_INT_TX 2124 | HAL_INT_RXEOL | HAL_INT_RXORN 2125 | HAL_INT_TXURN 2126 | HAL_INT_FATAL | HAL_INT_GLOBAL; 2127 2128 /* 2129 * Enable RX EDMA bits. Note these overlap with 2130 * HAL_INT_RX and HAL_INT_RXDESC respectively. 2131 */ 2132 if (sc->sc_isedma) 2133 sc->sc_imask |= (HAL_INT_RXHP | HAL_INT_RXLP); 2134 2135 /* 2136 * Enable MIB interrupts when there are hardware phy counters. 2137 * Note we only do this (at the moment) for station mode. 2138 */ 2139 if (sc->sc_needmib && ic->ic_opmode == IEEE80211_M_STA) 2140 sc->sc_imask |= HAL_INT_MIB; 2141 2142 /* Enable global TX timeout and carrier sense timeout if available */ 2143 if (ath_hal_gtxto_supported(ah)) 2144 sc->sc_imask |= HAL_INT_GTT; 2145 2146 DPRINTF(sc, ATH_DEBUG_RESET, "%s: imask=0x%x\n", 2147 __func__, sc->sc_imask); 2148 2149 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2150 callout_reset(&sc->sc_wd_ch, hz, ath_watchdog, sc); 2151 ath_hal_intrset(ah, sc->sc_imask); 2152 2153 ATH_UNLOCK(sc); 2154 2155 #ifdef ATH_TX99_DIAG 2156 if (sc->sc_tx99 != NULL) 2157 sc->sc_tx99->start(sc->sc_tx99); 2158 else 2159 #endif 2160 ieee80211_start_all(ic); /* start all vap's */ 2161 } 2162 2163 static void 2164 ath_stop_locked(struct ifnet *ifp) 2165 { 2166 struct ath_softc *sc = ifp->if_softc; 2167 struct ath_hal *ah = sc->sc_ah; 2168 2169 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid %u if_flags 0x%x\n", 2170 __func__, sc->sc_invalid, ifp->if_flags); 2171 2172 ATH_LOCK_ASSERT(sc); 2173 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 2174 /* 2175 * Shutdown the hardware and driver: 2176 * reset 802.11 state machine 2177 * turn off timers 2178 * disable interrupts 2179 * turn off the radio 2180 * clear transmit machinery 2181 * clear receive machinery 2182 * drain and release tx queues 2183 * reclaim beacon resources 2184 * power down hardware 2185 * 2186 * Note that some of this work is not possible if the 2187 * hardware is gone (invalid). 2188 */ 2189 #ifdef ATH_TX99_DIAG 2190 if (sc->sc_tx99 != NULL) 2191 sc->sc_tx99->stop(sc->sc_tx99); 2192 #endif 2193 callout_stop(&sc->sc_wd_ch); 2194 sc->sc_wd_timer = 0; 2195 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 2196 if (!sc->sc_invalid) { 2197 if (sc->sc_softled) { 2198 callout_stop(&sc->sc_ledtimer); 2199 ath_hal_gpioset(ah, sc->sc_ledpin, 2200 !sc->sc_ledon); 2201 sc->sc_blinking = 0; 2202 } 2203 ath_hal_intrset(ah, 0); 2204 } 2205 ath_draintxq(sc, ATH_RESET_DEFAULT); 2206 if (!sc->sc_invalid) { 2207 ath_stoprecv(sc, 1); 2208 ath_hal_phydisable(ah); 2209 } else 2210 sc->sc_rxlink = NULL; 2211 ath_beacon_free(sc); /* XXX not needed */ 2212 } 2213 } 2214 2215 #define MAX_TXRX_ITERATIONS 1000 2216 static void 2217 ath_txrx_stop_locked(struct ath_softc *sc) 2218 { 2219 int i = MAX_TXRX_ITERATIONS; 2220 2221 ATH_UNLOCK_ASSERT(sc); 2222 ATH_PCU_LOCK_ASSERT(sc); 2223 2224 /* 2225 * Sleep until all the pending operations have completed. 2226 * 2227 * The caller must ensure that reset has been incremented 2228 * or the pending operations may continue being queued. 2229 */ 2230 while (sc->sc_rxproc_cnt || sc->sc_txproc_cnt || 2231 sc->sc_txstart_cnt || sc->sc_intr_cnt) { 2232 if (i <= 0) 2233 break; 2234 msleep(sc, &sc->sc_pcu_mtx, 0, "ath_txrx_stop", 1); 2235 i--; 2236 } 2237 2238 if (i <= 0) 2239 device_printf(sc->sc_dev, 2240 "%s: didn't finish after %d iterations\n", 2241 __func__, MAX_TXRX_ITERATIONS); 2242 } 2243 #undef MAX_TXRX_ITERATIONS 2244 2245 #if 0 2246 static void 2247 ath_txrx_stop(struct ath_softc *sc) 2248 { 2249 ATH_UNLOCK_ASSERT(sc); 2250 ATH_PCU_UNLOCK_ASSERT(sc); 2251 2252 ATH_PCU_LOCK(sc); 2253 ath_txrx_stop_locked(sc); 2254 ATH_PCU_UNLOCK(sc); 2255 } 2256 #endif 2257 2258 static void 2259 ath_txrx_start(struct ath_softc *sc) 2260 { 2261 2262 taskqueue_unblock(sc->sc_tq); 2263 } 2264 2265 /* 2266 * Grab the reset lock, and wait around until noone else 2267 * is trying to do anything with it. 2268 * 2269 * This is totally horrible but we can't hold this lock for 2270 * long enough to do TX/RX or we end up with net80211/ip stack 2271 * LORs and eventual deadlock. 2272 * 2273 * "dowait" signals whether to spin, waiting for the reset 2274 * lock count to reach 0. This should (for now) only be used 2275 * during the reset path, as the rest of the code may not 2276 * be locking-reentrant enough to behave correctly. 2277 * 2278 * Another, cleaner way should be found to serialise all of 2279 * these operations. 2280 */ 2281 #define MAX_RESET_ITERATIONS 10 2282 static int 2283 ath_reset_grablock(struct ath_softc *sc, int dowait) 2284 { 2285 int w = 0; 2286 int i = MAX_RESET_ITERATIONS; 2287 2288 ATH_PCU_LOCK_ASSERT(sc); 2289 do { 2290 if (sc->sc_inreset_cnt == 0) { 2291 w = 1; 2292 break; 2293 } 2294 if (dowait == 0) { 2295 w = 0; 2296 break; 2297 } 2298 ATH_PCU_UNLOCK(sc); 2299 pause("ath_reset_grablock", 1); 2300 i--; 2301 ATH_PCU_LOCK(sc); 2302 } while (i > 0); 2303 2304 /* 2305 * We always increment the refcounter, regardless 2306 * of whether we succeeded to get it in an exclusive 2307 * way. 2308 */ 2309 sc->sc_inreset_cnt++; 2310 2311 if (i <= 0) 2312 device_printf(sc->sc_dev, 2313 "%s: didn't finish after %d iterations\n", 2314 __func__, MAX_RESET_ITERATIONS); 2315 2316 if (w == 0) 2317 device_printf(sc->sc_dev, 2318 "%s: warning, recursive reset path!\n", 2319 __func__); 2320 2321 return w; 2322 } 2323 #undef MAX_RESET_ITERATIONS 2324 2325 /* 2326 * XXX TODO: write ath_reset_releaselock 2327 */ 2328 2329 static void 2330 ath_stop(struct ifnet *ifp) 2331 { 2332 struct ath_softc *sc = ifp->if_softc; 2333 2334 ATH_LOCK(sc); 2335 ath_stop_locked(ifp); 2336 ATH_UNLOCK(sc); 2337 } 2338 2339 /* 2340 * Reset the hardware w/o losing operational state. This is 2341 * basically a more efficient way of doing ath_stop, ath_init, 2342 * followed by state transitions to the current 802.11 2343 * operational state. Used to recover from various errors and 2344 * to reset or reload hardware state. 2345 */ 2346 int 2347 ath_reset(struct ifnet *ifp, ATH_RESET_TYPE reset_type) 2348 { 2349 struct ath_softc *sc = ifp->if_softc; 2350 struct ieee80211com *ic = ifp->if_l2com; 2351 struct ath_hal *ah = sc->sc_ah; 2352 HAL_STATUS status; 2353 int i; 2354 2355 DPRINTF(sc, ATH_DEBUG_RESET, "%s: called\n", __func__); 2356 2357 /* Ensure ATH_LOCK isn't held; ath_rx_proc can't be locked */ 2358 ATH_PCU_UNLOCK_ASSERT(sc); 2359 ATH_UNLOCK_ASSERT(sc); 2360 2361 /* Try to (stop any further TX/RX from occuring */ 2362 taskqueue_block(sc->sc_tq); 2363 2364 ATH_PCU_LOCK(sc); 2365 2366 /* 2367 * Grab the reset lock before TX/RX is stopped. 2368 * 2369 * This is needed to ensure that when the TX/RX actually does finish, 2370 * no further TX/RX/reset runs in parallel with this. 2371 */ 2372 if (ath_reset_grablock(sc, 1) == 0) { 2373 device_printf(sc->sc_dev, "%s: concurrent reset! Danger!\n", 2374 __func__); 2375 } 2376 2377 /* disable interrupts */ 2378 ath_hal_intrset(ah, 0); 2379 2380 /* 2381 * Now, ensure that any in progress TX/RX completes before we 2382 * continue. 2383 */ 2384 ath_txrx_stop_locked(sc); 2385 2386 ATH_PCU_UNLOCK(sc); 2387 2388 /* 2389 * Should now wait for pending TX/RX to complete 2390 * and block future ones from occuring. This needs to be 2391 * done before the TX queue is drained. 2392 */ 2393 ath_draintxq(sc, reset_type); /* stop xmit side */ 2394 2395 /* 2396 * Regardless of whether we're doing a no-loss flush or 2397 * not, stop the PCU and handle what's in the RX queue. 2398 * That way frames aren't dropped which shouldn't be. 2399 */ 2400 ath_stoprecv(sc, (reset_type != ATH_RESET_NOLOSS)); 2401 ath_rx_flush(sc); 2402 2403 ath_settkipmic(sc); /* configure TKIP MIC handling */ 2404 /* NB: indicate channel change so we do a full reset */ 2405 ath_update_chainmasks(sc, ic->ic_curchan); 2406 ath_hal_setchainmasks(sc->sc_ah, sc->sc_cur_txchainmask, 2407 sc->sc_cur_rxchainmask); 2408 if (!ath_hal_reset(ah, sc->sc_opmode, ic->ic_curchan, AH_TRUE, &status)) 2409 if_printf(ifp, "%s: unable to reset hardware; hal status %u\n", 2410 __func__, status); 2411 sc->sc_diversity = ath_hal_getdiversity(ah); 2412 2413 /* Let DFS at it in case it's a DFS channel */ 2414 ath_dfs_radar_enable(sc, ic->ic_curchan); 2415 2416 /* Let spectral at in case spectral is enabled */ 2417 ath_spectral_enable(sc, ic->ic_curchan); 2418 2419 /* 2420 * Let bluetooth coexistence at in case it's needed for this channel 2421 */ 2422 ath_btcoex_enable(sc, ic->ic_curchan); 2423 2424 /* 2425 * If we're doing TDMA, enforce the TXOP limitation for chips that 2426 * support it. 2427 */ 2428 if (sc->sc_hasenforcetxop && sc->sc_tdma) 2429 ath_hal_setenforcetxop(sc->sc_ah, 1); 2430 else 2431 ath_hal_setenforcetxop(sc->sc_ah, 0); 2432 2433 if (ath_startrecv(sc) != 0) /* restart recv */ 2434 if_printf(ifp, "%s: unable to start recv logic\n", __func__); 2435 /* 2436 * We may be doing a reset in response to an ioctl 2437 * that changes the channel so update any state that 2438 * might change as a result. 2439 */ 2440 ath_chan_change(sc, ic->ic_curchan); 2441 if (sc->sc_beacons) { /* restart beacons */ 2442 #ifdef IEEE80211_SUPPORT_TDMA 2443 if (sc->sc_tdma) 2444 ath_tdma_config(sc, NULL); 2445 else 2446 #endif 2447 ath_beacon_config(sc, NULL); 2448 } 2449 2450 /* 2451 * Release the reset lock and re-enable interrupts here. 2452 * If an interrupt was being processed in ath_intr(), 2453 * it would disable interrupts at this point. So we have 2454 * to atomically enable interrupts and decrement the 2455 * reset counter - this way ath_intr() doesn't end up 2456 * disabling interrupts without a corresponding enable 2457 * in the rest or channel change path. 2458 */ 2459 ATH_PCU_LOCK(sc); 2460 sc->sc_inreset_cnt--; 2461 /* XXX only do this if sc_inreset_cnt == 0? */ 2462 ath_hal_intrset(ah, sc->sc_imask); 2463 ATH_PCU_UNLOCK(sc); 2464 2465 /* 2466 * TX and RX can be started here. If it were started with 2467 * sc_inreset_cnt > 0, the TX and RX path would abort. 2468 * Thus if this is a nested call through the reset or 2469 * channel change code, TX completion will occur but 2470 * RX completion and ath_start / ath_tx_start will not 2471 * run. 2472 */ 2473 2474 /* Restart TX/RX as needed */ 2475 ath_txrx_start(sc); 2476 2477 /* Restart TX completion and pending TX */ 2478 if (reset_type == ATH_RESET_NOLOSS) { 2479 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { 2480 if (ATH_TXQ_SETUP(sc, i)) { 2481 ATH_TXQ_LOCK(&sc->sc_txq[i]); 2482 ath_txq_restart_dma(sc, &sc->sc_txq[i]); 2483 ATH_TXQ_UNLOCK(&sc->sc_txq[i]); 2484 2485 ATH_TX_LOCK(sc); 2486 ath_txq_sched(sc, &sc->sc_txq[i]); 2487 ATH_TX_UNLOCK(sc); 2488 } 2489 } 2490 } 2491 2492 /* 2493 * This may have been set during an ath_start() call which 2494 * set this once it detected a concurrent TX was going on. 2495 * So, clear it. 2496 */ 2497 IF_LOCK(&ifp->if_snd); 2498 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2499 IF_UNLOCK(&ifp->if_snd); 2500 2501 /* Handle any frames in the TX queue */ 2502 /* 2503 * XXX should this be done by the caller, rather than 2504 * ath_reset() ? 2505 */ 2506 ath_tx_kick(sc); /* restart xmit */ 2507 return 0; 2508 } 2509 2510 static int 2511 ath_reset_vap(struct ieee80211vap *vap, u_long cmd) 2512 { 2513 struct ieee80211com *ic = vap->iv_ic; 2514 struct ifnet *ifp = ic->ic_ifp; 2515 struct ath_softc *sc = ifp->if_softc; 2516 struct ath_hal *ah = sc->sc_ah; 2517 2518 switch (cmd) { 2519 case IEEE80211_IOC_TXPOWER: 2520 /* 2521 * If per-packet TPC is enabled, then we have nothing 2522 * to do; otherwise we need to force the global limit. 2523 * All this can happen directly; no need to reset. 2524 */ 2525 if (!ath_hal_gettpc(ah)) 2526 ath_hal_settxpowlimit(ah, ic->ic_txpowlimit); 2527 return 0; 2528 } 2529 /* XXX? Full or NOLOSS? */ 2530 return ath_reset(ifp, ATH_RESET_FULL); 2531 } 2532 2533 struct ath_buf * 2534 _ath_getbuf_locked(struct ath_softc *sc, ath_buf_type_t btype) 2535 { 2536 struct ath_buf *bf; 2537 2538 ATH_TXBUF_LOCK_ASSERT(sc); 2539 2540 if (btype == ATH_BUFTYPE_MGMT) 2541 bf = TAILQ_FIRST(&sc->sc_txbuf_mgmt); 2542 else 2543 bf = TAILQ_FIRST(&sc->sc_txbuf); 2544 2545 if (bf == NULL) { 2546 sc->sc_stats.ast_tx_getnobuf++; 2547 } else { 2548 if (bf->bf_flags & ATH_BUF_BUSY) { 2549 sc->sc_stats.ast_tx_getbusybuf++; 2550 bf = NULL; 2551 } 2552 } 2553 2554 if (bf != NULL && (bf->bf_flags & ATH_BUF_BUSY) == 0) { 2555 if (btype == ATH_BUFTYPE_MGMT) 2556 TAILQ_REMOVE(&sc->sc_txbuf_mgmt, bf, bf_list); 2557 else { 2558 TAILQ_REMOVE(&sc->sc_txbuf, bf, bf_list); 2559 sc->sc_txbuf_cnt--; 2560 2561 /* 2562 * This shuldn't happen; however just to be 2563 * safe print a warning and fudge the txbuf 2564 * count. 2565 */ 2566 if (sc->sc_txbuf_cnt < 0) { 2567 device_printf(sc->sc_dev, 2568 "%s: sc_txbuf_cnt < 0?\n", 2569 __func__); 2570 sc->sc_txbuf_cnt = 0; 2571 } 2572 } 2573 } else 2574 bf = NULL; 2575 2576 if (bf == NULL) { 2577 /* XXX should check which list, mgmt or otherwise */ 2578 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: %s\n", __func__, 2579 TAILQ_FIRST(&sc->sc_txbuf) == NULL ? 2580 "out of xmit buffers" : "xmit buffer busy"); 2581 return NULL; 2582 } 2583 2584 /* XXX TODO: should do this at buffer list initialisation */ 2585 /* XXX (then, ensure the buffer has the right flag set) */ 2586 bf->bf_flags = 0; 2587 if (btype == ATH_BUFTYPE_MGMT) 2588 bf->bf_flags |= ATH_BUF_MGMT; 2589 else 2590 bf->bf_flags &= (~ATH_BUF_MGMT); 2591 2592 /* Valid bf here; clear some basic fields */ 2593 bf->bf_next = NULL; /* XXX just to be sure */ 2594 bf->bf_last = NULL; /* XXX again, just to be sure */ 2595 bf->bf_comp = NULL; /* XXX again, just to be sure */ 2596 bzero(&bf->bf_state, sizeof(bf->bf_state)); 2597 2598 /* 2599 * Track the descriptor ID only if doing EDMA 2600 */ 2601 if (sc->sc_isedma) { 2602 bf->bf_descid = sc->sc_txbuf_descid; 2603 sc->sc_txbuf_descid++; 2604 } 2605 2606 return bf; 2607 } 2608 2609 /* 2610 * When retrying a software frame, buffers marked ATH_BUF_BUSY 2611 * can't be thrown back on the queue as they could still be 2612 * in use by the hardware. 2613 * 2614 * This duplicates the buffer, or returns NULL. 2615 * 2616 * The descriptor is also copied but the link pointers and 2617 * the DMA segments aren't copied; this frame should thus 2618 * be again passed through the descriptor setup/chain routines 2619 * so the link is correct. 2620 * 2621 * The caller must free the buffer using ath_freebuf(). 2622 */ 2623 struct ath_buf * 2624 ath_buf_clone(struct ath_softc *sc, struct ath_buf *bf) 2625 { 2626 struct ath_buf *tbf; 2627 2628 tbf = ath_getbuf(sc, 2629 (bf->bf_flags & ATH_BUF_MGMT) ? 2630 ATH_BUFTYPE_MGMT : ATH_BUFTYPE_NORMAL); 2631 if (tbf == NULL) 2632 return NULL; /* XXX failure? Why? */ 2633 2634 /* Copy basics */ 2635 tbf->bf_next = NULL; 2636 tbf->bf_nseg = bf->bf_nseg; 2637 tbf->bf_flags = bf->bf_flags & ATH_BUF_FLAGS_CLONE; 2638 tbf->bf_status = bf->bf_status; 2639 tbf->bf_m = bf->bf_m; 2640 tbf->bf_node = bf->bf_node; 2641 /* will be setup by the chain/setup function */ 2642 tbf->bf_lastds = NULL; 2643 /* for now, last == self */ 2644 tbf->bf_last = tbf; 2645 tbf->bf_comp = bf->bf_comp; 2646 2647 /* NOTE: DMA segments will be setup by the setup/chain functions */ 2648 2649 /* The caller has to re-init the descriptor + links */ 2650 2651 /* 2652 * Free the DMA mapping here, before we NULL the mbuf. 2653 * We must only call bus_dmamap_unload() once per mbuf chain 2654 * or behaviour is undefined. 2655 */ 2656 if (bf->bf_m != NULL) { 2657 /* 2658 * XXX is this POSTWRITE call required? 2659 */ 2660 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 2661 BUS_DMASYNC_POSTWRITE); 2662 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 2663 } 2664 2665 bf->bf_m = NULL; 2666 bf->bf_node = NULL; 2667 2668 /* Copy state */ 2669 memcpy(&tbf->bf_state, &bf->bf_state, sizeof(bf->bf_state)); 2670 2671 return tbf; 2672 } 2673 2674 struct ath_buf * 2675 ath_getbuf(struct ath_softc *sc, ath_buf_type_t btype) 2676 { 2677 struct ath_buf *bf; 2678 2679 ATH_TXBUF_LOCK(sc); 2680 bf = _ath_getbuf_locked(sc, btype); 2681 /* 2682 * If a mgmt buffer was requested but we're out of those, 2683 * try requesting a normal one. 2684 */ 2685 if (bf == NULL && btype == ATH_BUFTYPE_MGMT) 2686 bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL); 2687 ATH_TXBUF_UNLOCK(sc); 2688 if (bf == NULL) { 2689 struct ifnet *ifp = sc->sc_ifp; 2690 2691 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: stop queue\n", __func__); 2692 sc->sc_stats.ast_tx_qstop++; 2693 IF_LOCK(&ifp->if_snd); 2694 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2695 IF_UNLOCK(&ifp->if_snd); 2696 } 2697 return bf; 2698 } 2699 2700 static void 2701 ath_qflush(struct ifnet *ifp) 2702 { 2703 2704 /* XXX TODO */ 2705 } 2706 2707 /* 2708 * Transmit a single frame. 2709 * 2710 * net80211 will free the node reference if the transmit 2711 * fails, so don't free the node reference here. 2712 */ 2713 static int 2714 ath_transmit(struct ifnet *ifp, struct mbuf *m) 2715 { 2716 struct ieee80211com *ic = ifp->if_l2com; 2717 struct ath_softc *sc = ic->ic_ifp->if_softc; 2718 struct ieee80211_node *ni; 2719 struct mbuf *next; 2720 struct ath_buf *bf; 2721 ath_bufhead frags; 2722 int retval = 0; 2723 2724 /* 2725 * Tell the reset path that we're currently transmitting. 2726 */ 2727 ATH_PCU_LOCK(sc); 2728 if (sc->sc_inreset_cnt > 0) { 2729 DPRINTF(sc, ATH_DEBUG_XMIT, 2730 "%s: sc_inreset_cnt > 0; bailing\n", __func__); 2731 ATH_PCU_UNLOCK(sc); 2732 IF_LOCK(&ifp->if_snd); 2733 sc->sc_stats.ast_tx_qstop++; 2734 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2735 IF_UNLOCK(&ifp->if_snd); 2736 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_start_task: OACTIVE, finish"); 2737 return (ENOBUFS); /* XXX should be EINVAL or? */ 2738 } 2739 sc->sc_txstart_cnt++; 2740 ATH_PCU_UNLOCK(sc); 2741 2742 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_transmit: start"); 2743 /* 2744 * Grab the TX lock - it's ok to do this here; we haven't 2745 * yet started transmitting. 2746 */ 2747 ATH_TX_LOCK(sc); 2748 2749 /* 2750 * Node reference, if there's one. 2751 */ 2752 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 2753 2754 /* 2755 * Enforce how deep a node queue can get. 2756 * 2757 * XXX it would be nicer if we kept an mbuf queue per 2758 * node and only whacked them into ath_bufs when we 2759 * are ready to schedule some traffic from them. 2760 * .. that may come later. 2761 * 2762 * XXX we should also track the per-node hardware queue 2763 * depth so it is easy to limit the _SUM_ of the swq and 2764 * hwq frames. Since we only schedule two HWQ frames 2765 * at a time, this should be OK for now. 2766 */ 2767 if ((!(m->m_flags & M_EAPOL)) && 2768 (ATH_NODE(ni)->an_swq_depth > sc->sc_txq_node_maxdepth)) { 2769 sc->sc_stats.ast_tx_nodeq_overflow++; 2770 m_freem(m); 2771 m = NULL; 2772 retval = ENOBUFS; 2773 goto finish; 2774 } 2775 2776 /* 2777 * Check how many TX buffers are available. 2778 * 2779 * If this is for non-EAPOL traffic, just leave some 2780 * space free in order for buffer cloning and raw 2781 * frame transmission to occur. 2782 * 2783 * If it's for EAPOL traffic, ignore this for now. 2784 * Management traffic will be sent via the raw transmit 2785 * method which bypasses this check. 2786 * 2787 * This is needed to ensure that EAPOL frames during 2788 * (re) keying have a chance to go out. 2789 * 2790 * See kern/138379 for more information. 2791 */ 2792 if ((!(m->m_flags & M_EAPOL)) && 2793 (sc->sc_txbuf_cnt <= sc->sc_txq_data_minfree)) { 2794 sc->sc_stats.ast_tx_nobuf++; 2795 m_freem(m); 2796 m = NULL; 2797 retval = ENOBUFS; 2798 goto finish; 2799 } 2800 2801 /* 2802 * Grab a TX buffer and associated resources. 2803 * 2804 * If it's an EAPOL frame, allocate a MGMT ath_buf. 2805 * That way even with temporary buffer exhaustion due to 2806 * the data path doesn't leave us without the ability 2807 * to transmit management frames. 2808 * 2809 * Otherwise allocate a normal buffer. 2810 */ 2811 if (m->m_flags & M_EAPOL) 2812 bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 2813 else 2814 bf = ath_getbuf(sc, ATH_BUFTYPE_NORMAL); 2815 2816 if (bf == NULL) { 2817 /* 2818 * If we failed to allocate a buffer, fail. 2819 * 2820 * We shouldn't fail normally, due to the check 2821 * above. 2822 */ 2823 sc->sc_stats.ast_tx_nobuf++; 2824 IF_LOCK(&ifp->if_snd); 2825 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2826 IF_UNLOCK(&ifp->if_snd); 2827 m_freem(m); 2828 m = NULL; 2829 retval = ENOBUFS; 2830 goto finish; 2831 } 2832 2833 /* 2834 * At this point we have a buffer; so we need to free it 2835 * if we hit any error conditions. 2836 */ 2837 2838 /* 2839 * Check for fragmentation. If this frame 2840 * has been broken up verify we have enough 2841 * buffers to send all the fragments so all 2842 * go out or none... 2843 */ 2844 TAILQ_INIT(&frags); 2845 if ((m->m_flags & M_FRAG) && 2846 !ath_txfrag_setup(sc, &frags, m, ni)) { 2847 DPRINTF(sc, ATH_DEBUG_XMIT, 2848 "%s: out of txfrag buffers\n", __func__); 2849 sc->sc_stats.ast_tx_nofrag++; 2850 ifp->if_oerrors++; 2851 ath_freetx(m); 2852 goto bad; 2853 } 2854 2855 /* 2856 * At this point if we have any TX fragments, then we will 2857 * have bumped the node reference once for each of those. 2858 */ 2859 2860 /* 2861 * XXX Is there anything actually _enforcing_ that the 2862 * fragments are being transmitted in one hit, rather than 2863 * being interleaved with other transmissions on that 2864 * hardware queue? 2865 * 2866 * The ATH TX output lock is the only thing serialising this 2867 * right now. 2868 */ 2869 2870 /* 2871 * Calculate the "next fragment" length field in ath_buf 2872 * in order to let the transmit path know enough about 2873 * what to next write to the hardware. 2874 */ 2875 if (m->m_flags & M_FRAG) { 2876 struct ath_buf *fbf = bf; 2877 struct ath_buf *n_fbf = NULL; 2878 struct mbuf *fm = m->m_nextpkt; 2879 2880 /* 2881 * We need to walk the list of fragments and set 2882 * the next size to the following buffer. 2883 * However, the first buffer isn't in the frag 2884 * list, so we have to do some gymnastics here. 2885 */ 2886 TAILQ_FOREACH(n_fbf, &frags, bf_list) { 2887 fbf->bf_nextfraglen = fm->m_pkthdr.len; 2888 fbf = n_fbf; 2889 fm = fm->m_nextpkt; 2890 } 2891 } 2892 2893 /* 2894 * Bump the ifp output counter. 2895 * 2896 * XXX should use atomics? 2897 */ 2898 ifp->if_opackets++; 2899 nextfrag: 2900 /* 2901 * Pass the frame to the h/w for transmission. 2902 * Fragmented frames have each frag chained together 2903 * with m_nextpkt. We know there are sufficient ath_buf's 2904 * to send all the frags because of work done by 2905 * ath_txfrag_setup. We leave m_nextpkt set while 2906 * calling ath_tx_start so it can use it to extend the 2907 * the tx duration to cover the subsequent frag and 2908 * so it can reclaim all the mbufs in case of an error; 2909 * ath_tx_start clears m_nextpkt once it commits to 2910 * handing the frame to the hardware. 2911 * 2912 * Note: if this fails, then the mbufs are freed but 2913 * not the node reference. 2914 */ 2915 next = m->m_nextpkt; 2916 if (ath_tx_start(sc, ni, bf, m)) { 2917 bad: 2918 ifp->if_oerrors++; 2919 reclaim: 2920 bf->bf_m = NULL; 2921 bf->bf_node = NULL; 2922 ATH_TXBUF_LOCK(sc); 2923 ath_returnbuf_head(sc, bf); 2924 /* 2925 * Free the rest of the node references and 2926 * buffers for the fragment list. 2927 */ 2928 ath_txfrag_cleanup(sc, &frags, ni); 2929 ATH_TXBUF_UNLOCK(sc); 2930 retval = ENOBUFS; 2931 goto finish; 2932 } 2933 2934 /* 2935 * Check here if the node is in power save state. 2936 */ 2937 ath_tx_update_tim(sc, ni, 1); 2938 2939 if (next != NULL) { 2940 /* 2941 * Beware of state changing between frags. 2942 * XXX check sta power-save state? 2943 */ 2944 if (ni->ni_vap->iv_state != IEEE80211_S_RUN) { 2945 DPRINTF(sc, ATH_DEBUG_XMIT, 2946 "%s: flush fragmented packet, state %s\n", 2947 __func__, 2948 ieee80211_state_name[ni->ni_vap->iv_state]); 2949 /* XXX dmamap */ 2950 ath_freetx(next); 2951 goto reclaim; 2952 } 2953 m = next; 2954 bf = TAILQ_FIRST(&frags); 2955 KASSERT(bf != NULL, ("no buf for txfrag")); 2956 TAILQ_REMOVE(&frags, bf, bf_list); 2957 goto nextfrag; 2958 } 2959 2960 /* 2961 * Bump watchdog timer. 2962 */ 2963 sc->sc_wd_timer = 5; 2964 2965 finish: 2966 ATH_TX_UNLOCK(sc); 2967 2968 /* 2969 * Finished transmitting! 2970 */ 2971 ATH_PCU_LOCK(sc); 2972 sc->sc_txstart_cnt--; 2973 ATH_PCU_UNLOCK(sc); 2974 2975 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_transmit: finished"); 2976 2977 return (retval); 2978 } 2979 2980 static int 2981 ath_media_change(struct ifnet *ifp) 2982 { 2983 int error = ieee80211_media_change(ifp); 2984 /* NB: only the fixed rate can change and that doesn't need a reset */ 2985 return (error == ENETRESET ? 0 : error); 2986 } 2987 2988 /* 2989 * Block/unblock tx+rx processing while a key change is done. 2990 * We assume the caller serializes key management operations 2991 * so we only need to worry about synchronization with other 2992 * uses that originate in the driver. 2993 */ 2994 static void 2995 ath_key_update_begin(struct ieee80211vap *vap) 2996 { 2997 struct ifnet *ifp = vap->iv_ic->ic_ifp; 2998 struct ath_softc *sc = ifp->if_softc; 2999 3000 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 3001 taskqueue_block(sc->sc_tq); 3002 IF_LOCK(&ifp->if_snd); /* NB: doesn't block mgmt frames */ 3003 } 3004 3005 static void 3006 ath_key_update_end(struct ieee80211vap *vap) 3007 { 3008 struct ifnet *ifp = vap->iv_ic->ic_ifp; 3009 struct ath_softc *sc = ifp->if_softc; 3010 3011 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 3012 IF_UNLOCK(&ifp->if_snd); 3013 taskqueue_unblock(sc->sc_tq); 3014 } 3015 3016 static void 3017 ath_update_promisc(struct ifnet *ifp) 3018 { 3019 struct ath_softc *sc = ifp->if_softc; 3020 u_int32_t rfilt; 3021 3022 /* configure rx filter */ 3023 rfilt = ath_calcrxfilter(sc); 3024 ath_hal_setrxfilter(sc->sc_ah, rfilt); 3025 3026 DPRINTF(sc, ATH_DEBUG_MODE, "%s: RX filter 0x%x\n", __func__, rfilt); 3027 } 3028 3029 static void 3030 ath_update_mcast(struct ifnet *ifp) 3031 { 3032 struct ath_softc *sc = ifp->if_softc; 3033 u_int32_t mfilt[2]; 3034 3035 /* calculate and install multicast filter */ 3036 if ((ifp->if_flags & IFF_ALLMULTI) == 0) { 3037 struct ifmultiaddr *ifma; 3038 /* 3039 * Merge multicast addresses to form the hardware filter. 3040 */ 3041 mfilt[0] = mfilt[1] = 0; 3042 if_maddr_rlock(ifp); /* XXX need some fiddling to remove? */ 3043 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 3044 caddr_t dl; 3045 u_int32_t val; 3046 u_int8_t pos; 3047 3048 /* calculate XOR of eight 6bit values */ 3049 dl = LLADDR((struct sockaddr_dl *) ifma->ifma_addr); 3050 val = LE_READ_4(dl + 0); 3051 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 3052 val = LE_READ_4(dl + 3); 3053 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 3054 pos &= 0x3f; 3055 mfilt[pos / 32] |= (1 << (pos % 32)); 3056 } 3057 if_maddr_runlock(ifp); 3058 } else 3059 mfilt[0] = mfilt[1] = ~0; 3060 ath_hal_setmcastfilter(sc->sc_ah, mfilt[0], mfilt[1]); 3061 DPRINTF(sc, ATH_DEBUG_MODE, "%s: MC filter %08x:%08x\n", 3062 __func__, mfilt[0], mfilt[1]); 3063 } 3064 3065 void 3066 ath_mode_init(struct ath_softc *sc) 3067 { 3068 struct ifnet *ifp = sc->sc_ifp; 3069 struct ath_hal *ah = sc->sc_ah; 3070 u_int32_t rfilt; 3071 3072 /* configure rx filter */ 3073 rfilt = ath_calcrxfilter(sc); 3074 ath_hal_setrxfilter(ah, rfilt); 3075 3076 /* configure operational mode */ 3077 ath_hal_setopmode(ah); 3078 3079 DPRINTF(sc, ATH_DEBUG_STATE | ATH_DEBUG_MODE, 3080 "%s: ah=%p, ifp=%p, if_addr=%p\n", 3081 __func__, 3082 ah, 3083 ifp, 3084 (ifp == NULL) ? NULL : ifp->if_addr); 3085 3086 /* handle any link-level address change */ 3087 ath_hal_setmac(ah, IF_LLADDR(ifp)); 3088 3089 /* calculate and install multicast filter */ 3090 ath_update_mcast(ifp); 3091 } 3092 3093 /* 3094 * Set the slot time based on the current setting. 3095 */ 3096 void 3097 ath_setslottime(struct ath_softc *sc) 3098 { 3099 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 3100 struct ath_hal *ah = sc->sc_ah; 3101 u_int usec; 3102 3103 if (IEEE80211_IS_CHAN_HALF(ic->ic_curchan)) 3104 usec = 13; 3105 else if (IEEE80211_IS_CHAN_QUARTER(ic->ic_curchan)) 3106 usec = 21; 3107 else if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan)) { 3108 /* honor short/long slot time only in 11g */ 3109 /* XXX shouldn't honor on pure g or turbo g channel */ 3110 if (ic->ic_flags & IEEE80211_F_SHSLOT) 3111 usec = HAL_SLOT_TIME_9; 3112 else 3113 usec = HAL_SLOT_TIME_20; 3114 } else 3115 usec = HAL_SLOT_TIME_9; 3116 3117 DPRINTF(sc, ATH_DEBUG_RESET, 3118 "%s: chan %u MHz flags 0x%x %s slot, %u usec\n", 3119 __func__, ic->ic_curchan->ic_freq, ic->ic_curchan->ic_flags, 3120 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", usec); 3121 3122 ath_hal_setslottime(ah, usec); 3123 sc->sc_updateslot = OK; 3124 } 3125 3126 /* 3127 * Callback from the 802.11 layer to update the 3128 * slot time based on the current setting. 3129 */ 3130 static void 3131 ath_updateslot(struct ifnet *ifp) 3132 { 3133 struct ath_softc *sc = ifp->if_softc; 3134 struct ieee80211com *ic = ifp->if_l2com; 3135 3136 /* 3137 * When not coordinating the BSS, change the hardware 3138 * immediately. For other operation we defer the change 3139 * until beacon updates have propagated to the stations. 3140 */ 3141 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 3142 ic->ic_opmode == IEEE80211_M_MBSS) 3143 sc->sc_updateslot = UPDATE; 3144 else 3145 ath_setslottime(sc); 3146 } 3147 3148 /* 3149 * Append the contents of src to dst; both queues 3150 * are assumed to be locked. 3151 */ 3152 void 3153 ath_txqmove(struct ath_txq *dst, struct ath_txq *src) 3154 { 3155 3156 ATH_TXQ_LOCK_ASSERT(src); 3157 ATH_TXQ_LOCK_ASSERT(dst); 3158 3159 TAILQ_CONCAT(&dst->axq_q, &src->axq_q, bf_list); 3160 dst->axq_link = src->axq_link; 3161 src->axq_link = NULL; 3162 dst->axq_depth += src->axq_depth; 3163 dst->axq_aggr_depth += src->axq_aggr_depth; 3164 src->axq_depth = 0; 3165 src->axq_aggr_depth = 0; 3166 } 3167 3168 /* 3169 * Reset the hardware, with no loss. 3170 * 3171 * This can't be used for a general case reset. 3172 */ 3173 static void 3174 ath_reset_proc(void *arg, int pending) 3175 { 3176 struct ath_softc *sc = arg; 3177 struct ifnet *ifp = sc->sc_ifp; 3178 3179 #if 0 3180 if_printf(ifp, "%s: resetting\n", __func__); 3181 #endif 3182 ath_reset(ifp, ATH_RESET_NOLOSS); 3183 } 3184 3185 /* 3186 * Reset the hardware after detecting beacons have stopped. 3187 */ 3188 static void 3189 ath_bstuck_proc(void *arg, int pending) 3190 { 3191 struct ath_softc *sc = arg; 3192 struct ifnet *ifp = sc->sc_ifp; 3193 uint32_t hangs = 0; 3194 3195 if (ath_hal_gethangstate(sc->sc_ah, 0xff, &hangs) && hangs != 0) 3196 if_printf(ifp, "bb hang detected (0x%x)\n", hangs); 3197 3198 #ifdef ATH_DEBUG_ALQ 3199 if (if_ath_alq_checkdebug(&sc->sc_alq, ATH_ALQ_STUCK_BEACON)) 3200 if_ath_alq_post(&sc->sc_alq, ATH_ALQ_STUCK_BEACON, 0, NULL); 3201 #endif 3202 3203 if_printf(ifp, "stuck beacon; resetting (bmiss count %u)\n", 3204 sc->sc_bmisscount); 3205 sc->sc_stats.ast_bstuck++; 3206 /* 3207 * This assumes that there's no simultaneous channel mode change 3208 * occuring. 3209 */ 3210 ath_reset(ifp, ATH_RESET_NOLOSS); 3211 } 3212 3213 static void 3214 ath_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 3215 { 3216 bus_addr_t *paddr = (bus_addr_t*) arg; 3217 KASSERT(error == 0, ("error %u on bus_dma callback", error)); 3218 *paddr = segs->ds_addr; 3219 } 3220 3221 /* 3222 * Allocate the descriptors and appropriate DMA tag/setup. 3223 * 3224 * For some situations (eg EDMA TX completion), there isn't a requirement 3225 * for the ath_buf entries to be allocated. 3226 */ 3227 int 3228 ath_descdma_alloc_desc(struct ath_softc *sc, 3229 struct ath_descdma *dd, ath_bufhead *head, 3230 const char *name, int ds_size, int ndesc) 3231 { 3232 #define DS2PHYS(_dd, _ds) \ 3233 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc)) 3234 #define ATH_DESC_4KB_BOUND_CHECK(_daddr, _len) \ 3235 ((((u_int32_t)(_daddr) & 0xFFF) > (0x1000 - (_len))) ? 1 : 0) 3236 struct ifnet *ifp = sc->sc_ifp; 3237 int error; 3238 3239 dd->dd_descsize = ds_size; 3240 3241 DPRINTF(sc, ATH_DEBUG_RESET, 3242 "%s: %s DMA: %u desc, %d bytes per descriptor\n", 3243 __func__, name, ndesc, dd->dd_descsize); 3244 3245 dd->dd_name = name; 3246 dd->dd_desc_len = dd->dd_descsize * ndesc; 3247 3248 /* 3249 * Merlin work-around: 3250 * Descriptors that cross the 4KB boundary can't be used. 3251 * Assume one skipped descriptor per 4KB page. 3252 */ 3253 if (! ath_hal_split4ktrans(sc->sc_ah)) { 3254 int numpages = dd->dd_desc_len / 4096; 3255 dd->dd_desc_len += ds_size * numpages; 3256 } 3257 3258 /* 3259 * Setup DMA descriptor area. 3260 * 3261 * BUS_DMA_ALLOCNOW is not used; we never use bounce 3262 * buffers for the descriptors themselves. 3263 */ 3264 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), /* parent */ 3265 PAGE_SIZE, 0, /* alignment, bounds */ 3266 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 3267 BUS_SPACE_MAXADDR, /* highaddr */ 3268 NULL, NULL, /* filter, filterarg */ 3269 dd->dd_desc_len, /* maxsize */ 3270 1, /* nsegments */ 3271 dd->dd_desc_len, /* maxsegsize */ 3272 0, /* flags */ 3273 NULL, /* lockfunc */ 3274 NULL, /* lockarg */ 3275 &dd->dd_dmat); 3276 if (error != 0) { 3277 if_printf(ifp, "cannot allocate %s DMA tag\n", dd->dd_name); 3278 return error; 3279 } 3280 3281 /* allocate descriptors */ 3282 error = bus_dmamem_alloc(dd->dd_dmat, (void**) &dd->dd_desc, 3283 BUS_DMA_NOWAIT | BUS_DMA_COHERENT, 3284 &dd->dd_dmamap); 3285 if (error != 0) { 3286 if_printf(ifp, "unable to alloc memory for %u %s descriptors, " 3287 "error %u\n", ndesc, dd->dd_name, error); 3288 goto fail1; 3289 } 3290 3291 error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap, 3292 dd->dd_desc, dd->dd_desc_len, 3293 ath_load_cb, &dd->dd_desc_paddr, 3294 BUS_DMA_NOWAIT); 3295 if (error != 0) { 3296 if_printf(ifp, "unable to map %s descriptors, error %u\n", 3297 dd->dd_name, error); 3298 goto fail2; 3299 } 3300 3301 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA map: %p (%lu) -> %p (%lu)\n", 3302 __func__, dd->dd_name, (uint8_t *) dd->dd_desc, 3303 (u_long) dd->dd_desc_len, (caddr_t) dd->dd_desc_paddr, 3304 /*XXX*/ (u_long) dd->dd_desc_len); 3305 3306 return (0); 3307 3308 fail2: 3309 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); 3310 fail1: 3311 bus_dma_tag_destroy(dd->dd_dmat); 3312 memset(dd, 0, sizeof(*dd)); 3313 return error; 3314 #undef DS2PHYS 3315 #undef ATH_DESC_4KB_BOUND_CHECK 3316 } 3317 3318 int 3319 ath_descdma_setup(struct ath_softc *sc, 3320 struct ath_descdma *dd, ath_bufhead *head, 3321 const char *name, int ds_size, int nbuf, int ndesc) 3322 { 3323 #define DS2PHYS(_dd, _ds) \ 3324 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc)) 3325 #define ATH_DESC_4KB_BOUND_CHECK(_daddr, _len) \ 3326 ((((u_int32_t)(_daddr) & 0xFFF) > (0x1000 - (_len))) ? 1 : 0) 3327 struct ifnet *ifp = sc->sc_ifp; 3328 uint8_t *ds; 3329 struct ath_buf *bf; 3330 int i, bsize, error; 3331 3332 /* Allocate descriptors */ 3333 error = ath_descdma_alloc_desc(sc, dd, head, name, ds_size, 3334 nbuf * ndesc); 3335 3336 /* Assume any errors during allocation were dealt with */ 3337 if (error != 0) { 3338 return (error); 3339 } 3340 3341 ds = (uint8_t *) dd->dd_desc; 3342 3343 /* allocate rx buffers */ 3344 bsize = sizeof(struct ath_buf) * nbuf; 3345 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO); 3346 if (bf == NULL) { 3347 if_printf(ifp, "malloc of %s buffers failed, size %u\n", 3348 dd->dd_name, bsize); 3349 goto fail3; 3350 } 3351 dd->dd_bufptr = bf; 3352 3353 TAILQ_INIT(head); 3354 for (i = 0; i < nbuf; i++, bf++, ds += (ndesc * dd->dd_descsize)) { 3355 bf->bf_desc = (struct ath_desc *) ds; 3356 bf->bf_daddr = DS2PHYS(dd, ds); 3357 if (! ath_hal_split4ktrans(sc->sc_ah)) { 3358 /* 3359 * Merlin WAR: Skip descriptor addresses which 3360 * cause 4KB boundary crossing along any point 3361 * in the descriptor. 3362 */ 3363 if (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr, 3364 dd->dd_descsize)) { 3365 /* Start at the next page */ 3366 ds += 0x1000 - (bf->bf_daddr & 0xFFF); 3367 bf->bf_desc = (struct ath_desc *) ds; 3368 bf->bf_daddr = DS2PHYS(dd, ds); 3369 } 3370 } 3371 error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT, 3372 &bf->bf_dmamap); 3373 if (error != 0) { 3374 if_printf(ifp, "unable to create dmamap for %s " 3375 "buffer %u, error %u\n", dd->dd_name, i, error); 3376 ath_descdma_cleanup(sc, dd, head); 3377 return error; 3378 } 3379 bf->bf_lastds = bf->bf_desc; /* Just an initial value */ 3380 TAILQ_INSERT_TAIL(head, bf, bf_list); 3381 } 3382 3383 /* 3384 * XXX TODO: ensure that ds doesn't overflow the descriptor 3385 * allocation otherwise weird stuff will occur and crash your 3386 * machine. 3387 */ 3388 return 0; 3389 /* XXX this should likely just call ath_descdma_cleanup() */ 3390 fail3: 3391 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 3392 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); 3393 bus_dma_tag_destroy(dd->dd_dmat); 3394 memset(dd, 0, sizeof(*dd)); 3395 return error; 3396 #undef DS2PHYS 3397 #undef ATH_DESC_4KB_BOUND_CHECK 3398 } 3399 3400 /* 3401 * Allocate ath_buf entries but no descriptor contents. 3402 * 3403 * This is for RX EDMA where the descriptors are the header part of 3404 * the RX buffer. 3405 */ 3406 int 3407 ath_descdma_setup_rx_edma(struct ath_softc *sc, 3408 struct ath_descdma *dd, ath_bufhead *head, 3409 const char *name, int nbuf, int rx_status_len) 3410 { 3411 struct ifnet *ifp = sc->sc_ifp; 3412 struct ath_buf *bf; 3413 int i, bsize, error; 3414 3415 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA: %u buffers\n", 3416 __func__, name, nbuf); 3417 3418 dd->dd_name = name; 3419 /* 3420 * This is (mostly) purely for show. We're not allocating any actual 3421 * descriptors here as EDMA RX has the descriptor be part 3422 * of the RX buffer. 3423 * 3424 * However, dd_desc_len is used by ath_descdma_free() to determine 3425 * whether we have already freed this DMA mapping. 3426 */ 3427 dd->dd_desc_len = rx_status_len * nbuf; 3428 dd->dd_descsize = rx_status_len; 3429 3430 /* allocate rx buffers */ 3431 bsize = sizeof(struct ath_buf) * nbuf; 3432 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO); 3433 if (bf == NULL) { 3434 if_printf(ifp, "malloc of %s buffers failed, size %u\n", 3435 dd->dd_name, bsize); 3436 error = ENOMEM; 3437 goto fail3; 3438 } 3439 dd->dd_bufptr = bf; 3440 3441 TAILQ_INIT(head); 3442 for (i = 0; i < nbuf; i++, bf++) { 3443 bf->bf_desc = NULL; 3444 bf->bf_daddr = 0; 3445 bf->bf_lastds = NULL; /* Just an initial value */ 3446 3447 error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT, 3448 &bf->bf_dmamap); 3449 if (error != 0) { 3450 if_printf(ifp, "unable to create dmamap for %s " 3451 "buffer %u, error %u\n", dd->dd_name, i, error); 3452 ath_descdma_cleanup(sc, dd, head); 3453 return error; 3454 } 3455 TAILQ_INSERT_TAIL(head, bf, bf_list); 3456 } 3457 return 0; 3458 fail3: 3459 memset(dd, 0, sizeof(*dd)); 3460 return error; 3461 } 3462 3463 void 3464 ath_descdma_cleanup(struct ath_softc *sc, 3465 struct ath_descdma *dd, ath_bufhead *head) 3466 { 3467 struct ath_buf *bf; 3468 struct ieee80211_node *ni; 3469 int do_warning = 0; 3470 3471 if (dd->dd_dmamap != 0) { 3472 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 3473 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); 3474 bus_dma_tag_destroy(dd->dd_dmat); 3475 } 3476 3477 if (head != NULL) { 3478 TAILQ_FOREACH(bf, head, bf_list) { 3479 if (bf->bf_m) { 3480 /* 3481 * XXX warn if there's buffers here. 3482 * XXX it should have been freed by the 3483 * owner! 3484 */ 3485 3486 if (do_warning == 0) { 3487 do_warning = 1; 3488 device_printf(sc->sc_dev, 3489 "%s: %s: mbuf should've been" 3490 " unmapped/freed!\n", 3491 __func__, 3492 dd->dd_name); 3493 } 3494 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3495 BUS_DMASYNC_POSTREAD); 3496 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 3497 m_freem(bf->bf_m); 3498 bf->bf_m = NULL; 3499 } 3500 if (bf->bf_dmamap != NULL) { 3501 bus_dmamap_destroy(sc->sc_dmat, bf->bf_dmamap); 3502 bf->bf_dmamap = NULL; 3503 } 3504 ni = bf->bf_node; 3505 bf->bf_node = NULL; 3506 if (ni != NULL) { 3507 /* 3508 * Reclaim node reference. 3509 */ 3510 ieee80211_free_node(ni); 3511 } 3512 } 3513 } 3514 3515 if (head != NULL) 3516 TAILQ_INIT(head); 3517 3518 if (dd->dd_bufptr != NULL) 3519 free(dd->dd_bufptr, M_ATHDEV); 3520 memset(dd, 0, sizeof(*dd)); 3521 } 3522 3523 static int 3524 ath_desc_alloc(struct ath_softc *sc) 3525 { 3526 int error; 3527 3528 error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf, 3529 "tx", sc->sc_tx_desclen, ath_txbuf, ATH_MAX_SCATTER); 3530 if (error != 0) { 3531 return error; 3532 } 3533 sc->sc_txbuf_cnt = ath_txbuf; 3534 3535 error = ath_descdma_setup(sc, &sc->sc_txdma_mgmt, &sc->sc_txbuf_mgmt, 3536 "tx_mgmt", sc->sc_tx_desclen, ath_txbuf_mgmt, 3537 ATH_TXDESC); 3538 if (error != 0) { 3539 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 3540 return error; 3541 } 3542 3543 /* 3544 * XXX mark txbuf_mgmt frames with ATH_BUF_MGMT, so the 3545 * flag doesn't have to be set in ath_getbuf_locked(). 3546 */ 3547 3548 error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf, 3549 "beacon", sc->sc_tx_desclen, ATH_BCBUF, 1); 3550 if (error != 0) { 3551 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 3552 ath_descdma_cleanup(sc, &sc->sc_txdma_mgmt, 3553 &sc->sc_txbuf_mgmt); 3554 return error; 3555 } 3556 return 0; 3557 } 3558 3559 static void 3560 ath_desc_free(struct ath_softc *sc) 3561 { 3562 3563 if (sc->sc_bdma.dd_desc_len != 0) 3564 ath_descdma_cleanup(sc, &sc->sc_bdma, &sc->sc_bbuf); 3565 if (sc->sc_txdma.dd_desc_len != 0) 3566 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 3567 if (sc->sc_txdma_mgmt.dd_desc_len != 0) 3568 ath_descdma_cleanup(sc, &sc->sc_txdma_mgmt, 3569 &sc->sc_txbuf_mgmt); 3570 } 3571 3572 static struct ieee80211_node * 3573 ath_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN]) 3574 { 3575 struct ieee80211com *ic = vap->iv_ic; 3576 struct ath_softc *sc = ic->ic_ifp->if_softc; 3577 const size_t space = sizeof(struct ath_node) + sc->sc_rc->arc_space; 3578 struct ath_node *an; 3579 3580 an = malloc(space, M_80211_NODE, M_NOWAIT|M_ZERO); 3581 if (an == NULL) { 3582 /* XXX stat+msg */ 3583 return NULL; 3584 } 3585 ath_rate_node_init(sc, an); 3586 3587 /* Setup the mutex - there's no associd yet so set the name to NULL */ 3588 snprintf(an->an_name, sizeof(an->an_name), "%s: node %p", 3589 device_get_nameunit(sc->sc_dev), an); 3590 mtx_init(&an->an_mtx, an->an_name, NULL, MTX_DEF); 3591 3592 /* XXX setup ath_tid */ 3593 ath_tx_tid_init(sc, an); 3594 3595 DPRINTF(sc, ATH_DEBUG_NODE, "%s: %6D: an %p\n", __func__, mac, ":", an); 3596 return &an->an_node; 3597 } 3598 3599 static void 3600 ath_node_cleanup(struct ieee80211_node *ni) 3601 { 3602 struct ieee80211com *ic = ni->ni_ic; 3603 struct ath_softc *sc = ic->ic_ifp->if_softc; 3604 3605 DPRINTF(sc, ATH_DEBUG_NODE, "%s: %6D: an %p\n", __func__, 3606 ni->ni_macaddr, ":", ATH_NODE(ni)); 3607 3608 /* Cleanup ath_tid, free unused bufs, unlink bufs in TXQ */ 3609 ath_tx_node_flush(sc, ATH_NODE(ni)); 3610 ath_rate_node_cleanup(sc, ATH_NODE(ni)); 3611 sc->sc_node_cleanup(ni); 3612 } 3613 3614 static void 3615 ath_node_free(struct ieee80211_node *ni) 3616 { 3617 struct ieee80211com *ic = ni->ni_ic; 3618 struct ath_softc *sc = ic->ic_ifp->if_softc; 3619 3620 DPRINTF(sc, ATH_DEBUG_NODE, "%s: %6D: an %p\n", __func__, 3621 ni->ni_macaddr, ":", ATH_NODE(ni)); 3622 mtx_destroy(&ATH_NODE(ni)->an_mtx); 3623 sc->sc_node_free(ni); 3624 } 3625 3626 static void 3627 ath_node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 3628 { 3629 struct ieee80211com *ic = ni->ni_ic; 3630 struct ath_softc *sc = ic->ic_ifp->if_softc; 3631 struct ath_hal *ah = sc->sc_ah; 3632 3633 *rssi = ic->ic_node_getrssi(ni); 3634 if (ni->ni_chan != IEEE80211_CHAN_ANYC) 3635 *noise = ath_hal_getchannoise(ah, ni->ni_chan); 3636 else 3637 *noise = -95; /* nominally correct */ 3638 } 3639 3640 /* 3641 * Set the default antenna. 3642 */ 3643 void 3644 ath_setdefantenna(struct ath_softc *sc, u_int antenna) 3645 { 3646 struct ath_hal *ah = sc->sc_ah; 3647 3648 /* XXX block beacon interrupts */ 3649 ath_hal_setdefantenna(ah, antenna); 3650 if (sc->sc_defant != antenna) 3651 sc->sc_stats.ast_ant_defswitch++; 3652 sc->sc_defant = antenna; 3653 sc->sc_rxotherant = 0; 3654 } 3655 3656 static void 3657 ath_txq_init(struct ath_softc *sc, struct ath_txq *txq, int qnum) 3658 { 3659 txq->axq_qnum = qnum; 3660 txq->axq_ac = 0; 3661 txq->axq_depth = 0; 3662 txq->axq_aggr_depth = 0; 3663 txq->axq_intrcnt = 0; 3664 txq->axq_link = NULL; 3665 txq->axq_softc = sc; 3666 TAILQ_INIT(&txq->axq_q); 3667 TAILQ_INIT(&txq->axq_tidq); 3668 TAILQ_INIT(&txq->fifo.axq_q); 3669 ATH_TXQ_LOCK_INIT(sc, txq); 3670 } 3671 3672 /* 3673 * Setup a h/w transmit queue. 3674 */ 3675 static struct ath_txq * 3676 ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) 3677 { 3678 #define N(a) (sizeof(a)/sizeof(a[0])) 3679 struct ath_hal *ah = sc->sc_ah; 3680 HAL_TXQ_INFO qi; 3681 int qnum; 3682 3683 memset(&qi, 0, sizeof(qi)); 3684 qi.tqi_subtype = subtype; 3685 qi.tqi_aifs = HAL_TXQ_USEDEFAULT; 3686 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; 3687 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; 3688 /* 3689 * Enable interrupts only for EOL and DESC conditions. 3690 * We mark tx descriptors to receive a DESC interrupt 3691 * when a tx queue gets deep; otherwise waiting for the 3692 * EOL to reap descriptors. Note that this is done to 3693 * reduce interrupt load and this only defers reaping 3694 * descriptors, never transmitting frames. Aside from 3695 * reducing interrupts this also permits more concurrency. 3696 * The only potential downside is if the tx queue backs 3697 * up in which case the top half of the kernel may backup 3698 * due to a lack of tx descriptors. 3699 */ 3700 if (sc->sc_isedma) 3701 qi.tqi_qflags = HAL_TXQ_TXEOLINT_ENABLE | 3702 HAL_TXQ_TXOKINT_ENABLE; 3703 else 3704 qi.tqi_qflags = HAL_TXQ_TXEOLINT_ENABLE | 3705 HAL_TXQ_TXDESCINT_ENABLE; 3706 3707 qnum = ath_hal_setuptxqueue(ah, qtype, &qi); 3708 if (qnum == -1) { 3709 /* 3710 * NB: don't print a message, this happens 3711 * normally on parts with too few tx queues 3712 */ 3713 return NULL; 3714 } 3715 if (qnum >= N(sc->sc_txq)) { 3716 device_printf(sc->sc_dev, 3717 "hal qnum %u out of range, max %zu!\n", 3718 qnum, N(sc->sc_txq)); 3719 ath_hal_releasetxqueue(ah, qnum); 3720 return NULL; 3721 } 3722 if (!ATH_TXQ_SETUP(sc, qnum)) { 3723 ath_txq_init(sc, &sc->sc_txq[qnum], qnum); 3724 sc->sc_txqsetup |= 1<<qnum; 3725 } 3726 return &sc->sc_txq[qnum]; 3727 #undef N 3728 } 3729 3730 /* 3731 * Setup a hardware data transmit queue for the specified 3732 * access control. The hal may not support all requested 3733 * queues in which case it will return a reference to a 3734 * previously setup queue. We record the mapping from ac's 3735 * to h/w queues for use by ath_tx_start and also track 3736 * the set of h/w queues being used to optimize work in the 3737 * transmit interrupt handler and related routines. 3738 */ 3739 static int 3740 ath_tx_setup(struct ath_softc *sc, int ac, int haltype) 3741 { 3742 #define N(a) (sizeof(a)/sizeof(a[0])) 3743 struct ath_txq *txq; 3744 3745 if (ac >= N(sc->sc_ac2q)) { 3746 device_printf(sc->sc_dev, "AC %u out of range, max %zu!\n", 3747 ac, N(sc->sc_ac2q)); 3748 return 0; 3749 } 3750 txq = ath_txq_setup(sc, HAL_TX_QUEUE_DATA, haltype); 3751 if (txq != NULL) { 3752 txq->axq_ac = ac; 3753 sc->sc_ac2q[ac] = txq; 3754 return 1; 3755 } else 3756 return 0; 3757 #undef N 3758 } 3759 3760 /* 3761 * Update WME parameters for a transmit queue. 3762 */ 3763 static int 3764 ath_txq_update(struct ath_softc *sc, int ac) 3765 { 3766 #define ATH_EXPONENT_TO_VALUE(v) ((1<<v)-1) 3767 #define ATH_TXOP_TO_US(v) (v<<5) 3768 struct ifnet *ifp = sc->sc_ifp; 3769 struct ieee80211com *ic = ifp->if_l2com; 3770 struct ath_txq *txq = sc->sc_ac2q[ac]; 3771 struct wmeParams *wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 3772 struct ath_hal *ah = sc->sc_ah; 3773 HAL_TXQ_INFO qi; 3774 3775 ath_hal_gettxqueueprops(ah, txq->axq_qnum, &qi); 3776 #ifdef IEEE80211_SUPPORT_TDMA 3777 if (sc->sc_tdma) { 3778 /* 3779 * AIFS is zero so there's no pre-transmit wait. The 3780 * burst time defines the slot duration and is configured 3781 * through net80211. The QCU is setup to not do post-xmit 3782 * back off, lockout all lower-priority QCU's, and fire 3783 * off the DMA beacon alert timer which is setup based 3784 * on the slot configuration. 3785 */ 3786 qi.tqi_qflags = HAL_TXQ_TXOKINT_ENABLE 3787 | HAL_TXQ_TXERRINT_ENABLE 3788 | HAL_TXQ_TXURNINT_ENABLE 3789 | HAL_TXQ_TXEOLINT_ENABLE 3790 | HAL_TXQ_DBA_GATED 3791 | HAL_TXQ_BACKOFF_DISABLE 3792 | HAL_TXQ_ARB_LOCKOUT_GLOBAL 3793 ; 3794 qi.tqi_aifs = 0; 3795 /* XXX +dbaprep? */ 3796 qi.tqi_readyTime = sc->sc_tdmaslotlen; 3797 qi.tqi_burstTime = qi.tqi_readyTime; 3798 } else { 3799 #endif 3800 /* 3801 * XXX shouldn't this just use the default flags 3802 * used in the previous queue setup? 3803 */ 3804 qi.tqi_qflags = HAL_TXQ_TXOKINT_ENABLE 3805 | HAL_TXQ_TXERRINT_ENABLE 3806 | HAL_TXQ_TXDESCINT_ENABLE 3807 | HAL_TXQ_TXURNINT_ENABLE 3808 | HAL_TXQ_TXEOLINT_ENABLE 3809 ; 3810 qi.tqi_aifs = wmep->wmep_aifsn; 3811 qi.tqi_cwmin = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); 3812 qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); 3813 qi.tqi_readyTime = 0; 3814 qi.tqi_burstTime = ATH_TXOP_TO_US(wmep->wmep_txopLimit); 3815 #ifdef IEEE80211_SUPPORT_TDMA 3816 } 3817 #endif 3818 3819 DPRINTF(sc, ATH_DEBUG_RESET, 3820 "%s: Q%u qflags 0x%x aifs %u cwmin %u cwmax %u burstTime %u\n", 3821 __func__, txq->axq_qnum, qi.tqi_qflags, 3822 qi.tqi_aifs, qi.tqi_cwmin, qi.tqi_cwmax, qi.tqi_burstTime); 3823 3824 if (!ath_hal_settxqueueprops(ah, txq->axq_qnum, &qi)) { 3825 if_printf(ifp, "unable to update hardware queue " 3826 "parameters for %s traffic!\n", 3827 ieee80211_wme_acnames[ac]); 3828 return 0; 3829 } else { 3830 ath_hal_resettxqueue(ah, txq->axq_qnum); /* push to h/w */ 3831 return 1; 3832 } 3833 #undef ATH_TXOP_TO_US 3834 #undef ATH_EXPONENT_TO_VALUE 3835 } 3836 3837 /* 3838 * Callback from the 802.11 layer to update WME parameters. 3839 */ 3840 int 3841 ath_wme_update(struct ieee80211com *ic) 3842 { 3843 struct ath_softc *sc = ic->ic_ifp->if_softc; 3844 3845 return !ath_txq_update(sc, WME_AC_BE) || 3846 !ath_txq_update(sc, WME_AC_BK) || 3847 !ath_txq_update(sc, WME_AC_VI) || 3848 !ath_txq_update(sc, WME_AC_VO) ? EIO : 0; 3849 } 3850 3851 /* 3852 * Reclaim resources for a setup queue. 3853 */ 3854 static void 3855 ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) 3856 { 3857 3858 ath_hal_releasetxqueue(sc->sc_ah, txq->axq_qnum); 3859 sc->sc_txqsetup &= ~(1<<txq->axq_qnum); 3860 ATH_TXQ_LOCK_DESTROY(txq); 3861 } 3862 3863 /* 3864 * Reclaim all tx queue resources. 3865 */ 3866 static void 3867 ath_tx_cleanup(struct ath_softc *sc) 3868 { 3869 int i; 3870 3871 ATH_TXBUF_LOCK_DESTROY(sc); 3872 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 3873 if (ATH_TXQ_SETUP(sc, i)) 3874 ath_tx_cleanupq(sc, &sc->sc_txq[i]); 3875 } 3876 3877 /* 3878 * Return h/w rate index for an IEEE rate (w/o basic rate bit) 3879 * using the current rates in sc_rixmap. 3880 */ 3881 int 3882 ath_tx_findrix(const struct ath_softc *sc, uint8_t rate) 3883 { 3884 int rix = sc->sc_rixmap[rate]; 3885 /* NB: return lowest rix for invalid rate */ 3886 return (rix == 0xff ? 0 : rix); 3887 } 3888 3889 static void 3890 ath_tx_update_stats(struct ath_softc *sc, struct ath_tx_status *ts, 3891 struct ath_buf *bf) 3892 { 3893 struct ieee80211_node *ni = bf->bf_node; 3894 struct ifnet *ifp = sc->sc_ifp; 3895 struct ieee80211com *ic = ifp->if_l2com; 3896 int sr, lr, pri; 3897 3898 if (ts->ts_status == 0) { 3899 u_int8_t txant = ts->ts_antenna; 3900 sc->sc_stats.ast_ant_tx[txant]++; 3901 sc->sc_ant_tx[txant]++; 3902 if (ts->ts_finaltsi != 0) 3903 sc->sc_stats.ast_tx_altrate++; 3904 pri = M_WME_GETAC(bf->bf_m); 3905 if (pri >= WME_AC_VO) 3906 ic->ic_wme.wme_hipri_traffic++; 3907 if ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0) 3908 ni->ni_inact = ni->ni_inact_reload; 3909 } else { 3910 if (ts->ts_status & HAL_TXERR_XRETRY) 3911 sc->sc_stats.ast_tx_xretries++; 3912 if (ts->ts_status & HAL_TXERR_FIFO) 3913 sc->sc_stats.ast_tx_fifoerr++; 3914 if (ts->ts_status & HAL_TXERR_FILT) 3915 sc->sc_stats.ast_tx_filtered++; 3916 if (ts->ts_status & HAL_TXERR_XTXOP) 3917 sc->sc_stats.ast_tx_xtxop++; 3918 if (ts->ts_status & HAL_TXERR_TIMER_EXPIRED) 3919 sc->sc_stats.ast_tx_timerexpired++; 3920 3921 if (bf->bf_m->m_flags & M_FF) 3922 sc->sc_stats.ast_ff_txerr++; 3923 } 3924 /* XXX when is this valid? */ 3925 if (ts->ts_flags & HAL_TX_DESC_CFG_ERR) 3926 sc->sc_stats.ast_tx_desccfgerr++; 3927 /* 3928 * This can be valid for successful frame transmission! 3929 * If there's a TX FIFO underrun during aggregate transmission, 3930 * the MAC will pad the rest of the aggregate with delimiters. 3931 * If a BA is returned, the frame is marked as "OK" and it's up 3932 * to the TX completion code to notice which frames weren't 3933 * successfully transmitted. 3934 */ 3935 if (ts->ts_flags & HAL_TX_DATA_UNDERRUN) 3936 sc->sc_stats.ast_tx_data_underrun++; 3937 if (ts->ts_flags & HAL_TX_DELIM_UNDERRUN) 3938 sc->sc_stats.ast_tx_delim_underrun++; 3939 3940 sr = ts->ts_shortretry; 3941 lr = ts->ts_longretry; 3942 sc->sc_stats.ast_tx_shortretry += sr; 3943 sc->sc_stats.ast_tx_longretry += lr; 3944 3945 } 3946 3947 /* 3948 * The default completion. If fail is 1, this means 3949 * "please don't retry the frame, and just return -1 status 3950 * to the net80211 stack. 3951 */ 3952 void 3953 ath_tx_default_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3954 { 3955 struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3956 int st; 3957 3958 if (fail == 1) 3959 st = -1; 3960 else 3961 st = ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0) ? 3962 ts->ts_status : HAL_TXERR_XRETRY; 3963 3964 #if 0 3965 if (bf->bf_state.bfs_dobaw) 3966 device_printf(sc->sc_dev, 3967 "%s: bf %p: seqno %d: dobaw should've been cleared!\n", 3968 __func__, 3969 bf, 3970 SEQNO(bf->bf_state.bfs_seqno)); 3971 #endif 3972 if (bf->bf_next != NULL) 3973 device_printf(sc->sc_dev, 3974 "%s: bf %p: seqno %d: bf_next not NULL!\n", 3975 __func__, 3976 bf, 3977 SEQNO(bf->bf_state.bfs_seqno)); 3978 3979 /* 3980 * Check if the node software queue is empty; if so 3981 * then clear the TIM. 3982 * 3983 * This needs to be done before the buffer is freed as 3984 * otherwise the node reference will have been released 3985 * and the node may not actually exist any longer. 3986 * 3987 * XXX I don't like this belonging here, but it's cleaner 3988 * to do it here right now then all the other places 3989 * where ath_tx_default_comp() is called. 3990 * 3991 * XXX TODO: during drain, ensure that the callback is 3992 * being called so we get a chance to update the TIM. 3993 */ 3994 if (bf->bf_node) { 3995 ATH_TX_LOCK(sc); 3996 ath_tx_update_tim(sc, bf->bf_node, 0); 3997 ATH_TX_UNLOCK(sc); 3998 } 3999 4000 /* 4001 * Do any tx complete callback. Note this must 4002 * be done before releasing the node reference. 4003 * This will free the mbuf, release the net80211 4004 * node and recycle the ath_buf. 4005 */ 4006 ath_tx_freebuf(sc, bf, st); 4007 } 4008 4009 /* 4010 * Update rate control with the given completion status. 4011 */ 4012 void 4013 ath_tx_update_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 4014 struct ath_rc_series *rc, struct ath_tx_status *ts, int frmlen, 4015 int nframes, int nbad) 4016 { 4017 struct ath_node *an; 4018 4019 /* Only for unicast frames */ 4020 if (ni == NULL) 4021 return; 4022 4023 an = ATH_NODE(ni); 4024 ATH_NODE_UNLOCK_ASSERT(an); 4025 4026 if ((ts->ts_status & HAL_TXERR_FILT) == 0) { 4027 ATH_NODE_LOCK(an); 4028 ath_rate_tx_complete(sc, an, rc, ts, frmlen, nframes, nbad); 4029 ATH_NODE_UNLOCK(an); 4030 } 4031 } 4032 4033 /* 4034 * Process the completion of the given buffer. 4035 * 4036 * This calls the rate control update and then the buffer completion. 4037 * This will either free the buffer or requeue it. In any case, the 4038 * bf pointer should be treated as invalid after this function is called. 4039 */ 4040 void 4041 ath_tx_process_buf_completion(struct ath_softc *sc, struct ath_txq *txq, 4042 struct ath_tx_status *ts, struct ath_buf *bf) 4043 { 4044 struct ieee80211_node *ni = bf->bf_node; 4045 struct ath_node *an = NULL; 4046 4047 ATH_TX_UNLOCK_ASSERT(sc); 4048 ATH_TXQ_UNLOCK_ASSERT(txq); 4049 4050 /* If unicast frame, update general statistics */ 4051 if (ni != NULL) { 4052 an = ATH_NODE(ni); 4053 /* update statistics */ 4054 ath_tx_update_stats(sc, ts, bf); 4055 } 4056 4057 /* 4058 * Call the completion handler. 4059 * The completion handler is responsible for 4060 * calling the rate control code. 4061 * 4062 * Frames with no completion handler get the 4063 * rate control code called here. 4064 */ 4065 if (bf->bf_comp == NULL) { 4066 if ((ts->ts_status & HAL_TXERR_FILT) == 0 && 4067 (bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0) { 4068 /* 4069 * XXX assume this isn't an aggregate 4070 * frame. 4071 */ 4072 ath_tx_update_ratectrl(sc, ni, 4073 bf->bf_state.bfs_rc, ts, 4074 bf->bf_state.bfs_pktlen, 1, 4075 (ts->ts_status == 0 ? 0 : 1)); 4076 } 4077 ath_tx_default_comp(sc, bf, 0); 4078 } else 4079 bf->bf_comp(sc, bf, 0); 4080 } 4081 4082 4083 4084 /* 4085 * Process completed xmit descriptors from the specified queue. 4086 * Kick the packet scheduler if needed. This can occur from this 4087 * particular task. 4088 */ 4089 static int 4090 ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq, int dosched) 4091 { 4092 struct ath_hal *ah = sc->sc_ah; 4093 struct ath_buf *bf; 4094 struct ath_desc *ds; 4095 struct ath_tx_status *ts; 4096 struct ieee80211_node *ni; 4097 #ifdef IEEE80211_SUPPORT_SUPERG 4098 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 4099 #endif /* IEEE80211_SUPPORT_SUPERG */ 4100 int nacked; 4101 HAL_STATUS status; 4102 4103 DPRINTF(sc, ATH_DEBUG_TX_PROC, "%s: tx queue %u head %p link %p\n", 4104 __func__, txq->axq_qnum, 4105 (caddr_t)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum), 4106 txq->axq_link); 4107 4108 ATH_KTR(sc, ATH_KTR_TXCOMP, 4, 4109 "ath_tx_processq: txq=%u head %p link %p depth %p", 4110 txq->axq_qnum, 4111 (caddr_t)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum), 4112 txq->axq_link, 4113 txq->axq_depth); 4114 4115 nacked = 0; 4116 for (;;) { 4117 ATH_TXQ_LOCK(txq); 4118 txq->axq_intrcnt = 0; /* reset periodic desc intr count */ 4119 bf = TAILQ_FIRST(&txq->axq_q); 4120 if (bf == NULL) { 4121 ATH_TXQ_UNLOCK(txq); 4122 break; 4123 } 4124 ds = bf->bf_lastds; /* XXX must be setup correctly! */ 4125 ts = &bf->bf_status.ds_txstat; 4126 4127 status = ath_hal_txprocdesc(ah, ds, ts); 4128 #ifdef ATH_DEBUG 4129 if (sc->sc_debug & ATH_DEBUG_XMIT_DESC) 4130 ath_printtxbuf(sc, bf, txq->axq_qnum, 0, 4131 status == HAL_OK); 4132 else if ((sc->sc_debug & ATH_DEBUG_RESET) && (dosched == 0)) 4133 ath_printtxbuf(sc, bf, txq->axq_qnum, 0, 4134 status == HAL_OK); 4135 #endif 4136 #ifdef ATH_DEBUG_ALQ 4137 if (if_ath_alq_checkdebug(&sc->sc_alq, 4138 ATH_ALQ_EDMA_TXSTATUS)) { 4139 if_ath_alq_post(&sc->sc_alq, ATH_ALQ_EDMA_TXSTATUS, 4140 sc->sc_tx_statuslen, 4141 (char *) ds); 4142 } 4143 #endif 4144 4145 if (status == HAL_EINPROGRESS) { 4146 ATH_KTR(sc, ATH_KTR_TXCOMP, 3, 4147 "ath_tx_processq: txq=%u, bf=%p ds=%p, HAL_EINPROGRESS", 4148 txq->axq_qnum, bf, ds); 4149 ATH_TXQ_UNLOCK(txq); 4150 break; 4151 } 4152 ATH_TXQ_REMOVE(txq, bf, bf_list); 4153 4154 /* 4155 * Sanity check. 4156 */ 4157 if (txq->axq_qnum != bf->bf_state.bfs_tx_queue) { 4158 device_printf(sc->sc_dev, 4159 "%s: TXQ=%d: bf=%p, bfs_tx_queue=%d\n", 4160 __func__, 4161 txq->axq_qnum, 4162 bf, 4163 bf->bf_state.bfs_tx_queue); 4164 } 4165 if (txq->axq_qnum != bf->bf_last->bf_state.bfs_tx_queue) { 4166 device_printf(sc->sc_dev, 4167 "%s: TXQ=%d: bf_last=%p, bfs_tx_queue=%d\n", 4168 __func__, 4169 txq->axq_qnum, 4170 bf->bf_last, 4171 bf->bf_last->bf_state.bfs_tx_queue); 4172 } 4173 4174 #if 0 4175 if (txq->axq_depth > 0) { 4176 /* 4177 * More frames follow. Mark the buffer busy 4178 * so it's not re-used while the hardware may 4179 * still re-read the link field in the descriptor. 4180 * 4181 * Use the last buffer in an aggregate as that 4182 * is where the hardware may be - intermediate 4183 * descriptors won't be "busy". 4184 */ 4185 bf->bf_last->bf_flags |= ATH_BUF_BUSY; 4186 } else 4187 txq->axq_link = NULL; 4188 #else 4189 bf->bf_last->bf_flags |= ATH_BUF_BUSY; 4190 #endif 4191 if (bf->bf_state.bfs_aggr) 4192 txq->axq_aggr_depth--; 4193 4194 ni = bf->bf_node; 4195 4196 ATH_KTR(sc, ATH_KTR_TXCOMP, 5, 4197 "ath_tx_processq: txq=%u, bf=%p, ds=%p, ni=%p, ts_status=0x%08x", 4198 txq->axq_qnum, bf, ds, ni, ts->ts_status); 4199 /* 4200 * If unicast frame was ack'd update RSSI, 4201 * including the last rx time used to 4202 * workaround phantom bmiss interrupts. 4203 */ 4204 if (ni != NULL && ts->ts_status == 0 && 4205 ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) { 4206 nacked++; 4207 sc->sc_stats.ast_tx_rssi = ts->ts_rssi; 4208 ATH_RSSI_LPF(sc->sc_halstats.ns_avgtxrssi, 4209 ts->ts_rssi); 4210 } 4211 ATH_TXQ_UNLOCK(txq); 4212 4213 /* 4214 * Update statistics and call completion 4215 */ 4216 ath_tx_process_buf_completion(sc, txq, ts, bf); 4217 4218 /* XXX at this point, bf and ni may be totally invalid */ 4219 } 4220 #ifdef IEEE80211_SUPPORT_SUPERG 4221 /* 4222 * Flush fast-frame staging queue when traffic slows. 4223 */ 4224 if (txq->axq_depth <= 1) 4225 ieee80211_ff_flush(ic, txq->axq_ac); 4226 #endif 4227 4228 /* Kick the software TXQ scheduler */ 4229 if (dosched) { 4230 ATH_TX_LOCK(sc); 4231 ath_txq_sched(sc, txq); 4232 ATH_TX_UNLOCK(sc); 4233 } 4234 4235 ATH_KTR(sc, ATH_KTR_TXCOMP, 1, 4236 "ath_tx_processq: txq=%u: done", 4237 txq->axq_qnum); 4238 4239 return nacked; 4240 } 4241 4242 #define TXQACTIVE(t, q) ( (t) & (1 << (q))) 4243 4244 /* 4245 * Deferred processing of transmit interrupt; special-cased 4246 * for a single hardware transmit queue (e.g. 5210 and 5211). 4247 */ 4248 static void 4249 ath_tx_proc_q0(void *arg, int npending) 4250 { 4251 struct ath_softc *sc = arg; 4252 struct ifnet *ifp = sc->sc_ifp; 4253 uint32_t txqs; 4254 4255 ATH_PCU_LOCK(sc); 4256 sc->sc_txproc_cnt++; 4257 txqs = sc->sc_txq_active; 4258 sc->sc_txq_active &= ~txqs; 4259 ATH_PCU_UNLOCK(sc); 4260 4261 ATH_KTR(sc, ATH_KTR_TXCOMP, 1, 4262 "ath_tx_proc_q0: txqs=0x%08x", txqs); 4263 4264 if (TXQACTIVE(txqs, 0) && ath_tx_processq(sc, &sc->sc_txq[0], 1)) 4265 /* XXX why is lastrx updated in tx code? */ 4266 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4267 if (TXQACTIVE(txqs, sc->sc_cabq->axq_qnum)) 4268 ath_tx_processq(sc, sc->sc_cabq, 1); 4269 IF_LOCK(&ifp->if_snd); 4270 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4271 IF_UNLOCK(&ifp->if_snd); 4272 sc->sc_wd_timer = 0; 4273 4274 if (sc->sc_softled) 4275 ath_led_event(sc, sc->sc_txrix); 4276 4277 ATH_PCU_LOCK(sc); 4278 sc->sc_txproc_cnt--; 4279 ATH_PCU_UNLOCK(sc); 4280 4281 ath_tx_kick(sc); 4282 } 4283 4284 /* 4285 * Deferred processing of transmit interrupt; special-cased 4286 * for four hardware queues, 0-3 (e.g. 5212 w/ WME support). 4287 */ 4288 static void 4289 ath_tx_proc_q0123(void *arg, int npending) 4290 { 4291 struct ath_softc *sc = arg; 4292 struct ifnet *ifp = sc->sc_ifp; 4293 int nacked; 4294 uint32_t txqs; 4295 4296 ATH_PCU_LOCK(sc); 4297 sc->sc_txproc_cnt++; 4298 txqs = sc->sc_txq_active; 4299 sc->sc_txq_active &= ~txqs; 4300 ATH_PCU_UNLOCK(sc); 4301 4302 ATH_KTR(sc, ATH_KTR_TXCOMP, 1, 4303 "ath_tx_proc_q0123: txqs=0x%08x", txqs); 4304 4305 /* 4306 * Process each active queue. 4307 */ 4308 nacked = 0; 4309 if (TXQACTIVE(txqs, 0)) 4310 nacked += ath_tx_processq(sc, &sc->sc_txq[0], 1); 4311 if (TXQACTIVE(txqs, 1)) 4312 nacked += ath_tx_processq(sc, &sc->sc_txq[1], 1); 4313 if (TXQACTIVE(txqs, 2)) 4314 nacked += ath_tx_processq(sc, &sc->sc_txq[2], 1); 4315 if (TXQACTIVE(txqs, 3)) 4316 nacked += ath_tx_processq(sc, &sc->sc_txq[3], 1); 4317 if (TXQACTIVE(txqs, sc->sc_cabq->axq_qnum)) 4318 ath_tx_processq(sc, sc->sc_cabq, 1); 4319 if (nacked) 4320 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4321 4322 IF_LOCK(&ifp->if_snd); 4323 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4324 IF_UNLOCK(&ifp->if_snd); 4325 sc->sc_wd_timer = 0; 4326 4327 if (sc->sc_softled) 4328 ath_led_event(sc, sc->sc_txrix); 4329 4330 ATH_PCU_LOCK(sc); 4331 sc->sc_txproc_cnt--; 4332 ATH_PCU_UNLOCK(sc); 4333 4334 ath_tx_kick(sc); 4335 } 4336 4337 /* 4338 * Deferred processing of transmit interrupt. 4339 */ 4340 static void 4341 ath_tx_proc(void *arg, int npending) 4342 { 4343 struct ath_softc *sc = arg; 4344 struct ifnet *ifp = sc->sc_ifp; 4345 int i, nacked; 4346 uint32_t txqs; 4347 4348 ATH_PCU_LOCK(sc); 4349 sc->sc_txproc_cnt++; 4350 txqs = sc->sc_txq_active; 4351 sc->sc_txq_active &= ~txqs; 4352 ATH_PCU_UNLOCK(sc); 4353 4354 ATH_KTR(sc, ATH_KTR_TXCOMP, 1, "ath_tx_proc: txqs=0x%08x", txqs); 4355 4356 /* 4357 * Process each active queue. 4358 */ 4359 nacked = 0; 4360 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4361 if (ATH_TXQ_SETUP(sc, i) && TXQACTIVE(txqs, i)) 4362 nacked += ath_tx_processq(sc, &sc->sc_txq[i], 1); 4363 if (nacked) 4364 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4365 4366 /* XXX check this inside of IF_LOCK? */ 4367 IF_LOCK(&ifp->if_snd); 4368 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4369 IF_UNLOCK(&ifp->if_snd); 4370 sc->sc_wd_timer = 0; 4371 4372 if (sc->sc_softled) 4373 ath_led_event(sc, sc->sc_txrix); 4374 4375 ATH_PCU_LOCK(sc); 4376 sc->sc_txproc_cnt--; 4377 ATH_PCU_UNLOCK(sc); 4378 4379 ath_tx_kick(sc); 4380 } 4381 #undef TXQACTIVE 4382 4383 /* 4384 * Deferred processing of TXQ rescheduling. 4385 */ 4386 static void 4387 ath_txq_sched_tasklet(void *arg, int npending) 4388 { 4389 struct ath_softc *sc = arg; 4390 int i; 4391 4392 /* XXX is skipping ok? */ 4393 ATH_PCU_LOCK(sc); 4394 #if 0 4395 if (sc->sc_inreset_cnt > 0) { 4396 device_printf(sc->sc_dev, 4397 "%s: sc_inreset_cnt > 0; skipping\n", __func__); 4398 ATH_PCU_UNLOCK(sc); 4399 return; 4400 } 4401 #endif 4402 sc->sc_txproc_cnt++; 4403 ATH_PCU_UNLOCK(sc); 4404 4405 ATH_TX_LOCK(sc); 4406 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { 4407 if (ATH_TXQ_SETUP(sc, i)) { 4408 ath_txq_sched(sc, &sc->sc_txq[i]); 4409 } 4410 } 4411 ATH_TX_UNLOCK(sc); 4412 4413 ATH_PCU_LOCK(sc); 4414 sc->sc_txproc_cnt--; 4415 ATH_PCU_UNLOCK(sc); 4416 } 4417 4418 void 4419 ath_returnbuf_tail(struct ath_softc *sc, struct ath_buf *bf) 4420 { 4421 4422 ATH_TXBUF_LOCK_ASSERT(sc); 4423 4424 if (bf->bf_flags & ATH_BUF_MGMT) 4425 TAILQ_INSERT_TAIL(&sc->sc_txbuf_mgmt, bf, bf_list); 4426 else { 4427 TAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 4428 sc->sc_txbuf_cnt++; 4429 if (sc->sc_txbuf_cnt > ath_txbuf) { 4430 device_printf(sc->sc_dev, 4431 "%s: sc_txbuf_cnt > %d?\n", 4432 __func__, 4433 ath_txbuf); 4434 sc->sc_txbuf_cnt = ath_txbuf; 4435 } 4436 } 4437 } 4438 4439 void 4440 ath_returnbuf_head(struct ath_softc *sc, struct ath_buf *bf) 4441 { 4442 4443 ATH_TXBUF_LOCK_ASSERT(sc); 4444 4445 if (bf->bf_flags & ATH_BUF_MGMT) 4446 TAILQ_INSERT_HEAD(&sc->sc_txbuf_mgmt, bf, bf_list); 4447 else { 4448 TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); 4449 sc->sc_txbuf_cnt++; 4450 if (sc->sc_txbuf_cnt > ATH_TXBUF) { 4451 device_printf(sc->sc_dev, 4452 "%s: sc_txbuf_cnt > %d?\n", 4453 __func__, 4454 ATH_TXBUF); 4455 sc->sc_txbuf_cnt = ATH_TXBUF; 4456 } 4457 } 4458 } 4459 4460 /* 4461 * Free the holding buffer if it exists 4462 */ 4463 void 4464 ath_txq_freeholdingbuf(struct ath_softc *sc, struct ath_txq *txq) 4465 { 4466 ATH_TXBUF_UNLOCK_ASSERT(sc); 4467 ATH_TXQ_LOCK_ASSERT(txq); 4468 4469 if (txq->axq_holdingbf == NULL) 4470 return; 4471 4472 txq->axq_holdingbf->bf_flags &= ~ATH_BUF_BUSY; 4473 4474 ATH_TXBUF_LOCK(sc); 4475 ath_returnbuf_tail(sc, txq->axq_holdingbf); 4476 ATH_TXBUF_UNLOCK(sc); 4477 4478 txq->axq_holdingbf = NULL; 4479 } 4480 4481 /* 4482 * Add this buffer to the holding queue, freeing the previous 4483 * one if it exists. 4484 */ 4485 static void 4486 ath_txq_addholdingbuf(struct ath_softc *sc, struct ath_buf *bf) 4487 { 4488 struct ath_txq *txq; 4489 4490 txq = &sc->sc_txq[bf->bf_state.bfs_tx_queue]; 4491 4492 ATH_TXBUF_UNLOCK_ASSERT(sc); 4493 ATH_TXQ_LOCK_ASSERT(txq); 4494 4495 /* XXX assert ATH_BUF_BUSY is set */ 4496 4497 /* XXX assert the tx queue is under the max number */ 4498 if (bf->bf_state.bfs_tx_queue > HAL_NUM_TX_QUEUES) { 4499 device_printf(sc->sc_dev, "%s: bf=%p: invalid tx queue (%d)\n", 4500 __func__, 4501 bf, 4502 bf->bf_state.bfs_tx_queue); 4503 bf->bf_flags &= ~ATH_BUF_BUSY; 4504 ath_returnbuf_tail(sc, bf); 4505 return; 4506 } 4507 ath_txq_freeholdingbuf(sc, txq); 4508 txq->axq_holdingbf = bf; 4509 } 4510 4511 /* 4512 * Return a buffer to the pool and update the 'busy' flag on the 4513 * previous 'tail' entry. 4514 * 4515 * This _must_ only be called when the buffer is involved in a completed 4516 * TX. The logic is that if it was part of an active TX, the previous 4517 * buffer on the list is now not involved in a halted TX DMA queue, waiting 4518 * for restart (eg for TDMA.) 4519 * 4520 * The caller must free the mbuf and recycle the node reference. 4521 * 4522 * XXX This method of handling busy / holding buffers is insanely stupid. 4523 * It requires bf_state.bfs_tx_queue to be correctly assigned. It would 4524 * be much nicer if buffers in the processq() methods would instead be 4525 * always completed there (pushed onto a txq or ath_bufhead) so we knew 4526 * exactly what hardware queue they came from in the first place. 4527 */ 4528 void 4529 ath_freebuf(struct ath_softc *sc, struct ath_buf *bf) 4530 { 4531 struct ath_txq *txq; 4532 4533 txq = &sc->sc_txq[bf->bf_state.bfs_tx_queue]; 4534 4535 KASSERT((bf->bf_node == NULL), ("%s: bf->bf_node != NULL\n", __func__)); 4536 KASSERT((bf->bf_m == NULL), ("%s: bf->bf_m != NULL\n", __func__)); 4537 4538 /* 4539 * If this buffer is busy, push it onto the holding queue. 4540 */ 4541 if (bf->bf_flags & ATH_BUF_BUSY) { 4542 ATH_TXQ_LOCK(txq); 4543 ath_txq_addholdingbuf(sc, bf); 4544 ATH_TXQ_UNLOCK(txq); 4545 return; 4546 } 4547 4548 /* 4549 * Not a busy buffer, so free normally 4550 */ 4551 ATH_TXBUF_LOCK(sc); 4552 ath_returnbuf_tail(sc, bf); 4553 ATH_TXBUF_UNLOCK(sc); 4554 } 4555 4556 /* 4557 * This is currently used by ath_tx_draintxq() and 4558 * ath_tx_tid_free_pkts(). 4559 * 4560 * It recycles a single ath_buf. 4561 */ 4562 void 4563 ath_tx_freebuf(struct ath_softc *sc, struct ath_buf *bf, int status) 4564 { 4565 struct ieee80211_node *ni = bf->bf_node; 4566 struct mbuf *m0 = bf->bf_m; 4567 4568 /* 4569 * Make sure that we only sync/unload if there's an mbuf. 4570 * If not (eg we cloned a buffer), the unload will have already 4571 * occured. 4572 */ 4573 if (bf->bf_m != NULL) { 4574 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 4575 BUS_DMASYNC_POSTWRITE); 4576 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 4577 } 4578 4579 bf->bf_node = NULL; 4580 bf->bf_m = NULL; 4581 4582 /* Free the buffer, it's not needed any longer */ 4583 ath_freebuf(sc, bf); 4584 4585 /* Pass the buffer back to net80211 - completing it */ 4586 ieee80211_tx_complete(ni, m0, status); 4587 } 4588 4589 static struct ath_buf * 4590 ath_tx_draintxq_get_one(struct ath_softc *sc, struct ath_txq *txq) 4591 { 4592 struct ath_buf *bf; 4593 4594 ATH_TXQ_LOCK_ASSERT(txq); 4595 4596 /* 4597 * Drain the FIFO queue first, then if it's 4598 * empty, move to the normal frame queue. 4599 */ 4600 bf = TAILQ_FIRST(&txq->fifo.axq_q); 4601 if (bf != NULL) { 4602 /* 4603 * Is it the last buffer in this set? 4604 * Decrement the FIFO counter. 4605 */ 4606 if (bf->bf_flags & ATH_BUF_FIFOEND) { 4607 if (txq->axq_fifo_depth == 0) { 4608 device_printf(sc->sc_dev, 4609 "%s: Q%d: fifo_depth=0, fifo.axq_depth=%d?\n", 4610 __func__, 4611 txq->axq_qnum, 4612 txq->fifo.axq_depth); 4613 } else 4614 txq->axq_fifo_depth--; 4615 } 4616 ATH_TXQ_REMOVE(&txq->fifo, bf, bf_list); 4617 return (bf); 4618 } 4619 4620 /* 4621 * Debugging! 4622 */ 4623 if (txq->axq_fifo_depth != 0 || txq->fifo.axq_depth != 0) { 4624 device_printf(sc->sc_dev, 4625 "%s: Q%d: fifo_depth=%d, fifo.axq_depth=%d\n", 4626 __func__, 4627 txq->axq_qnum, 4628 txq->axq_fifo_depth, 4629 txq->fifo.axq_depth); 4630 } 4631 4632 /* 4633 * Now drain the pending queue. 4634 */ 4635 bf = TAILQ_FIRST(&txq->axq_q); 4636 if (bf == NULL) { 4637 txq->axq_link = NULL; 4638 return (NULL); 4639 } 4640 ATH_TXQ_REMOVE(txq, bf, bf_list); 4641 return (bf); 4642 } 4643 4644 void 4645 ath_tx_draintxq(struct ath_softc *sc, struct ath_txq *txq) 4646 { 4647 #ifdef ATH_DEBUG 4648 struct ath_hal *ah = sc->sc_ah; 4649 #endif 4650 struct ath_buf *bf; 4651 u_int ix; 4652 4653 /* 4654 * NB: this assumes output has been stopped and 4655 * we do not need to block ath_tx_proc 4656 */ 4657 for (ix = 0;; ix++) { 4658 ATH_TXQ_LOCK(txq); 4659 bf = ath_tx_draintxq_get_one(sc, txq); 4660 if (bf == NULL) { 4661 ATH_TXQ_UNLOCK(txq); 4662 break; 4663 } 4664 if (bf->bf_state.bfs_aggr) 4665 txq->axq_aggr_depth--; 4666 #ifdef ATH_DEBUG 4667 if (sc->sc_debug & ATH_DEBUG_RESET) { 4668 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 4669 int status = 0; 4670 4671 /* 4672 * EDMA operation has a TX completion FIFO 4673 * separate from the TX descriptor, so this 4674 * method of checking the "completion" status 4675 * is wrong. 4676 */ 4677 if (! sc->sc_isedma) { 4678 status = (ath_hal_txprocdesc(ah, 4679 bf->bf_lastds, 4680 &bf->bf_status.ds_txstat) == HAL_OK); 4681 } 4682 ath_printtxbuf(sc, bf, txq->axq_qnum, ix, status); 4683 ieee80211_dump_pkt(ic, mtod(bf->bf_m, const uint8_t *), 4684 bf->bf_m->m_len, 0, -1); 4685 } 4686 #endif /* ATH_DEBUG */ 4687 /* 4688 * Since we're now doing magic in the completion 4689 * functions, we -must- call it for aggregation 4690 * destinations or BAW tracking will get upset. 4691 */ 4692 /* 4693 * Clear ATH_BUF_BUSY; the completion handler 4694 * will free the buffer. 4695 */ 4696 ATH_TXQ_UNLOCK(txq); 4697 bf->bf_flags &= ~ATH_BUF_BUSY; 4698 if (bf->bf_comp) 4699 bf->bf_comp(sc, bf, 1); 4700 else 4701 ath_tx_default_comp(sc, bf, 1); 4702 } 4703 4704 /* 4705 * Free the holding buffer if it exists 4706 */ 4707 ATH_TXQ_LOCK(txq); 4708 ath_txq_freeholdingbuf(sc, txq); 4709 ATH_TXQ_UNLOCK(txq); 4710 4711 /* 4712 * Drain software queued frames which are on 4713 * active TIDs. 4714 */ 4715 ath_tx_txq_drain(sc, txq); 4716 } 4717 4718 static void 4719 ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq) 4720 { 4721 struct ath_hal *ah = sc->sc_ah; 4722 4723 ATH_TXQ_LOCK_ASSERT(txq); 4724 4725 DPRINTF(sc, ATH_DEBUG_RESET, 4726 "%s: tx queue [%u] %p, active=%d, hwpending=%d, flags 0x%08x, " 4727 "link %p, holdingbf=%p\n", 4728 __func__, 4729 txq->axq_qnum, 4730 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, txq->axq_qnum), 4731 (int) (!! ath_hal_txqenabled(ah, txq->axq_qnum)), 4732 (int) ath_hal_numtxpending(ah, txq->axq_qnum), 4733 txq->axq_flags, 4734 txq->axq_link, 4735 txq->axq_holdingbf); 4736 4737 (void) ath_hal_stoptxdma(ah, txq->axq_qnum); 4738 /* We've stopped TX DMA, so mark this as stopped. */ 4739 txq->axq_flags &= ~ATH_TXQ_PUTRUNNING; 4740 4741 #ifdef ATH_DEBUG 4742 if ((sc->sc_debug & ATH_DEBUG_RESET) 4743 && (txq->axq_holdingbf != NULL)) { 4744 ath_printtxbuf(sc, txq->axq_holdingbf, txq->axq_qnum, 0, 0); 4745 } 4746 #endif 4747 } 4748 4749 int 4750 ath_stoptxdma(struct ath_softc *sc) 4751 { 4752 struct ath_hal *ah = sc->sc_ah; 4753 int i; 4754 4755 /* XXX return value */ 4756 if (sc->sc_invalid) 4757 return 0; 4758 4759 if (!sc->sc_invalid) { 4760 /* don't touch the hardware if marked invalid */ 4761 DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n", 4762 __func__, sc->sc_bhalq, 4763 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, sc->sc_bhalq), 4764 NULL); 4765 4766 /* stop the beacon queue */ 4767 (void) ath_hal_stoptxdma(ah, sc->sc_bhalq); 4768 4769 /* Stop the data queues */ 4770 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { 4771 if (ATH_TXQ_SETUP(sc, i)) { 4772 ATH_TXQ_LOCK(&sc->sc_txq[i]); 4773 ath_tx_stopdma(sc, &sc->sc_txq[i]); 4774 ATH_TXQ_UNLOCK(&sc->sc_txq[i]); 4775 } 4776 } 4777 } 4778 4779 return 1; 4780 } 4781 4782 #ifdef ATH_DEBUG 4783 void 4784 ath_tx_dump(struct ath_softc *sc, struct ath_txq *txq) 4785 { 4786 struct ath_hal *ah = sc->sc_ah; 4787 struct ath_buf *bf; 4788 int i = 0; 4789 4790 if (! (sc->sc_debug & ATH_DEBUG_RESET)) 4791 return; 4792 4793 device_printf(sc->sc_dev, "%s: Q%d: begin\n", 4794 __func__, txq->axq_qnum); 4795 TAILQ_FOREACH(bf, &txq->axq_q, bf_list) { 4796 ath_printtxbuf(sc, bf, txq->axq_qnum, i, 4797 ath_hal_txprocdesc(ah, bf->bf_lastds, 4798 &bf->bf_status.ds_txstat) == HAL_OK); 4799 i++; 4800 } 4801 device_printf(sc->sc_dev, "%s: Q%d: end\n", 4802 __func__, txq->axq_qnum); 4803 } 4804 #endif /* ATH_DEBUG */ 4805 4806 /* 4807 * Drain the transmit queues and reclaim resources. 4808 */ 4809 void 4810 ath_legacy_tx_drain(struct ath_softc *sc, ATH_RESET_TYPE reset_type) 4811 { 4812 struct ath_hal *ah = sc->sc_ah; 4813 struct ifnet *ifp = sc->sc_ifp; 4814 int i; 4815 struct ath_buf *bf_last; 4816 4817 (void) ath_stoptxdma(sc); 4818 4819 /* 4820 * Dump the queue contents 4821 */ 4822 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { 4823 /* 4824 * XXX TODO: should we just handle the completed TX frames 4825 * here, whether or not the reset is a full one or not? 4826 */ 4827 if (ATH_TXQ_SETUP(sc, i)) { 4828 #ifdef ATH_DEBUG 4829 if (sc->sc_debug & ATH_DEBUG_RESET) 4830 ath_tx_dump(sc, &sc->sc_txq[i]); 4831 #endif /* ATH_DEBUG */ 4832 if (reset_type == ATH_RESET_NOLOSS) { 4833 ath_tx_processq(sc, &sc->sc_txq[i], 0); 4834 ATH_TXQ_LOCK(&sc->sc_txq[i]); 4835 /* 4836 * Free the holding buffer; DMA is now 4837 * stopped. 4838 */ 4839 ath_txq_freeholdingbuf(sc, &sc->sc_txq[i]); 4840 /* 4841 * Setup the link pointer to be the 4842 * _last_ buffer/descriptor in the list. 4843 * If there's nothing in the list, set it 4844 * to NULL. 4845 */ 4846 bf_last = ATH_TXQ_LAST(&sc->sc_txq[i], 4847 axq_q_s); 4848 if (bf_last != NULL) { 4849 ath_hal_gettxdesclinkptr(ah, 4850 bf_last->bf_lastds, 4851 &sc->sc_txq[i].axq_link); 4852 } else { 4853 sc->sc_txq[i].axq_link = NULL; 4854 } 4855 ATH_TXQ_UNLOCK(&sc->sc_txq[i]); 4856 } else 4857 ath_tx_draintxq(sc, &sc->sc_txq[i]); 4858 } 4859 } 4860 #ifdef ATH_DEBUG 4861 if (sc->sc_debug & ATH_DEBUG_RESET) { 4862 struct ath_buf *bf = TAILQ_FIRST(&sc->sc_bbuf); 4863 if (bf != NULL && bf->bf_m != NULL) { 4864 ath_printtxbuf(sc, bf, sc->sc_bhalq, 0, 4865 ath_hal_txprocdesc(ah, bf->bf_lastds, 4866 &bf->bf_status.ds_txstat) == HAL_OK); 4867 ieee80211_dump_pkt(ifp->if_l2com, 4868 mtod(bf->bf_m, const uint8_t *), bf->bf_m->m_len, 4869 0, -1); 4870 } 4871 } 4872 #endif /* ATH_DEBUG */ 4873 IF_LOCK(&ifp->if_snd); 4874 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4875 IF_UNLOCK(&ifp->if_snd); 4876 sc->sc_wd_timer = 0; 4877 } 4878 4879 /* 4880 * Update internal state after a channel change. 4881 */ 4882 static void 4883 ath_chan_change(struct ath_softc *sc, struct ieee80211_channel *chan) 4884 { 4885 enum ieee80211_phymode mode; 4886 4887 /* 4888 * Change channels and update the h/w rate map 4889 * if we're switching; e.g. 11a to 11b/g. 4890 */ 4891 mode = ieee80211_chan2mode(chan); 4892 if (mode != sc->sc_curmode) 4893 ath_setcurmode(sc, mode); 4894 sc->sc_curchan = chan; 4895 } 4896 4897 /* 4898 * Set/change channels. If the channel is really being changed, 4899 * it's done by resetting the chip. To accomplish this we must 4900 * first cleanup any pending DMA, then restart stuff after a la 4901 * ath_init. 4902 */ 4903 static int 4904 ath_chan_set(struct ath_softc *sc, struct ieee80211_channel *chan) 4905 { 4906 struct ifnet *ifp = sc->sc_ifp; 4907 struct ieee80211com *ic = ifp->if_l2com; 4908 struct ath_hal *ah = sc->sc_ah; 4909 int ret = 0; 4910 4911 /* Treat this as an interface reset */ 4912 ATH_PCU_UNLOCK_ASSERT(sc); 4913 ATH_UNLOCK_ASSERT(sc); 4914 4915 /* (Try to) stop TX/RX from occuring */ 4916 taskqueue_block(sc->sc_tq); 4917 4918 ATH_PCU_LOCK(sc); 4919 4920 /* Stop new RX/TX/interrupt completion */ 4921 if (ath_reset_grablock(sc, 1) == 0) { 4922 device_printf(sc->sc_dev, "%s: concurrent reset! Danger!\n", 4923 __func__); 4924 } 4925 4926 ath_hal_intrset(ah, 0); 4927 4928 /* Stop pending RX/TX completion */ 4929 ath_txrx_stop_locked(sc); 4930 4931 ATH_PCU_UNLOCK(sc); 4932 4933 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %u (%u MHz, flags 0x%x)\n", 4934 __func__, ieee80211_chan2ieee(ic, chan), 4935 chan->ic_freq, chan->ic_flags); 4936 if (chan != sc->sc_curchan) { 4937 HAL_STATUS status; 4938 /* 4939 * To switch channels clear any pending DMA operations; 4940 * wait long enough for the RX fifo to drain, reset the 4941 * hardware at the new frequency, and then re-enable 4942 * the relevant bits of the h/w. 4943 */ 4944 #if 0 4945 ath_hal_intrset(ah, 0); /* disable interrupts */ 4946 #endif 4947 ath_stoprecv(sc, 1); /* turn off frame recv */ 4948 /* 4949 * First, handle completed TX/RX frames. 4950 */ 4951 ath_rx_flush(sc); 4952 ath_draintxq(sc, ATH_RESET_NOLOSS); 4953 /* 4954 * Next, flush the non-scheduled frames. 4955 */ 4956 ath_draintxq(sc, ATH_RESET_FULL); /* clear pending tx frames */ 4957 4958 ath_update_chainmasks(sc, chan); 4959 ath_hal_setchainmasks(sc->sc_ah, sc->sc_cur_txchainmask, 4960 sc->sc_cur_rxchainmask); 4961 if (!ath_hal_reset(ah, sc->sc_opmode, chan, AH_TRUE, &status)) { 4962 if_printf(ifp, "%s: unable to reset " 4963 "channel %u (%u MHz, flags 0x%x), hal status %u\n", 4964 __func__, ieee80211_chan2ieee(ic, chan), 4965 chan->ic_freq, chan->ic_flags, status); 4966 ret = EIO; 4967 goto finish; 4968 } 4969 sc->sc_diversity = ath_hal_getdiversity(ah); 4970 4971 /* Let DFS at it in case it's a DFS channel */ 4972 ath_dfs_radar_enable(sc, chan); 4973 4974 /* Let spectral at in case spectral is enabled */ 4975 ath_spectral_enable(sc, chan); 4976 4977 /* 4978 * Let bluetooth coexistence at in case it's needed for this 4979 * channel 4980 */ 4981 ath_btcoex_enable(sc, ic->ic_curchan); 4982 4983 /* 4984 * If we're doing TDMA, enforce the TXOP limitation for chips 4985 * that support it. 4986 */ 4987 if (sc->sc_hasenforcetxop && sc->sc_tdma) 4988 ath_hal_setenforcetxop(sc->sc_ah, 1); 4989 else 4990 ath_hal_setenforcetxop(sc->sc_ah, 0); 4991 4992 /* 4993 * Re-enable rx framework. 4994 */ 4995 if (ath_startrecv(sc) != 0) { 4996 if_printf(ifp, "%s: unable to restart recv logic\n", 4997 __func__); 4998 ret = EIO; 4999 goto finish; 5000 } 5001 5002 /* 5003 * Change channels and update the h/w rate map 5004 * if we're switching; e.g. 11a to 11b/g. 5005 */ 5006 ath_chan_change(sc, chan); 5007 5008 /* 5009 * Reset clears the beacon timers; reset them 5010 * here if needed. 5011 */ 5012 if (sc->sc_beacons) { /* restart beacons */ 5013 #ifdef IEEE80211_SUPPORT_TDMA 5014 if (sc->sc_tdma) 5015 ath_tdma_config(sc, NULL); 5016 else 5017 #endif 5018 ath_beacon_config(sc, NULL); 5019 } 5020 5021 /* 5022 * Re-enable interrupts. 5023 */ 5024 #if 0 5025 ath_hal_intrset(ah, sc->sc_imask); 5026 #endif 5027 } 5028 5029 finish: 5030 ATH_PCU_LOCK(sc); 5031 sc->sc_inreset_cnt--; 5032 /* XXX only do this if sc_inreset_cnt == 0? */ 5033 ath_hal_intrset(ah, sc->sc_imask); 5034 ATH_PCU_UNLOCK(sc); 5035 5036 IF_LOCK(&ifp->if_snd); 5037 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 5038 IF_UNLOCK(&ifp->if_snd); 5039 ath_txrx_start(sc); 5040 /* XXX ath_start? */ 5041 5042 return ret; 5043 } 5044 5045 /* 5046 * Periodically recalibrate the PHY to account 5047 * for temperature/environment changes. 5048 */ 5049 static void 5050 ath_calibrate(void *arg) 5051 { 5052 struct ath_softc *sc = arg; 5053 struct ath_hal *ah = sc->sc_ah; 5054 struct ifnet *ifp = sc->sc_ifp; 5055 struct ieee80211com *ic = ifp->if_l2com; 5056 HAL_BOOL longCal, isCalDone = AH_TRUE; 5057 HAL_BOOL aniCal, shortCal = AH_FALSE; 5058 int nextcal; 5059 5060 if (ic->ic_flags & IEEE80211_F_SCAN) /* defer, off channel */ 5061 goto restart; 5062 longCal = (ticks - sc->sc_lastlongcal >= ath_longcalinterval*hz); 5063 aniCal = (ticks - sc->sc_lastani >= ath_anicalinterval*hz/1000); 5064 if (sc->sc_doresetcal) 5065 shortCal = (ticks - sc->sc_lastshortcal >= ath_shortcalinterval*hz/1000); 5066 5067 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: shortCal=%d; longCal=%d; aniCal=%d\n", __func__, shortCal, longCal, aniCal); 5068 if (aniCal) { 5069 sc->sc_stats.ast_ani_cal++; 5070 sc->sc_lastani = ticks; 5071 ath_hal_ani_poll(ah, sc->sc_curchan); 5072 } 5073 5074 if (longCal) { 5075 sc->sc_stats.ast_per_cal++; 5076 sc->sc_lastlongcal = ticks; 5077 if (ath_hal_getrfgain(ah) == HAL_RFGAIN_NEED_CHANGE) { 5078 /* 5079 * Rfgain is out of bounds, reset the chip 5080 * to load new gain values. 5081 */ 5082 DPRINTF(sc, ATH_DEBUG_CALIBRATE, 5083 "%s: rfgain change\n", __func__); 5084 sc->sc_stats.ast_per_rfgain++; 5085 sc->sc_resetcal = 0; 5086 sc->sc_doresetcal = AH_TRUE; 5087 taskqueue_enqueue(sc->sc_tq, &sc->sc_resettask); 5088 callout_reset(&sc->sc_cal_ch, 1, ath_calibrate, sc); 5089 return; 5090 } 5091 /* 5092 * If this long cal is after an idle period, then 5093 * reset the data collection state so we start fresh. 5094 */ 5095 if (sc->sc_resetcal) { 5096 (void) ath_hal_calreset(ah, sc->sc_curchan); 5097 sc->sc_lastcalreset = ticks; 5098 sc->sc_lastshortcal = ticks; 5099 sc->sc_resetcal = 0; 5100 sc->sc_doresetcal = AH_TRUE; 5101 } 5102 } 5103 5104 /* Only call if we're doing a short/long cal, not for ANI calibration */ 5105 if (shortCal || longCal) { 5106 isCalDone = AH_FALSE; 5107 if (ath_hal_calibrateN(ah, sc->sc_curchan, longCal, &isCalDone)) { 5108 if (longCal) { 5109 /* 5110 * Calibrate noise floor data again in case of change. 5111 */ 5112 ath_hal_process_noisefloor(ah); 5113 } 5114 } else { 5115 DPRINTF(sc, ATH_DEBUG_ANY, 5116 "%s: calibration of channel %u failed\n", 5117 __func__, sc->sc_curchan->ic_freq); 5118 sc->sc_stats.ast_per_calfail++; 5119 } 5120 if (shortCal) 5121 sc->sc_lastshortcal = ticks; 5122 } 5123 if (!isCalDone) { 5124 restart: 5125 /* 5126 * Use a shorter interval to potentially collect multiple 5127 * data samples required to complete calibration. Once 5128 * we're told the work is done we drop back to a longer 5129 * interval between requests. We're more aggressive doing 5130 * work when operating as an AP to improve operation right 5131 * after startup. 5132 */ 5133 sc->sc_lastshortcal = ticks; 5134 nextcal = ath_shortcalinterval*hz/1000; 5135 if (sc->sc_opmode != HAL_M_HOSTAP) 5136 nextcal *= 10; 5137 sc->sc_doresetcal = AH_TRUE; 5138 } else { 5139 /* nextcal should be the shortest time for next event */ 5140 nextcal = ath_longcalinterval*hz; 5141 if (sc->sc_lastcalreset == 0) 5142 sc->sc_lastcalreset = sc->sc_lastlongcal; 5143 else if (ticks - sc->sc_lastcalreset >= ath_resetcalinterval*hz) 5144 sc->sc_resetcal = 1; /* setup reset next trip */ 5145 sc->sc_doresetcal = AH_FALSE; 5146 } 5147 /* ANI calibration may occur more often than short/long/resetcal */ 5148 if (ath_anicalinterval > 0) 5149 nextcal = MIN(nextcal, ath_anicalinterval*hz/1000); 5150 5151 if (nextcal != 0) { 5152 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: next +%u (%sisCalDone)\n", 5153 __func__, nextcal, isCalDone ? "" : "!"); 5154 callout_reset(&sc->sc_cal_ch, nextcal, ath_calibrate, sc); 5155 } else { 5156 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: calibration disabled\n", 5157 __func__); 5158 /* NB: don't rearm timer */ 5159 } 5160 } 5161 5162 static void 5163 ath_scan_start(struct ieee80211com *ic) 5164 { 5165 struct ifnet *ifp = ic->ic_ifp; 5166 struct ath_softc *sc = ifp->if_softc; 5167 struct ath_hal *ah = sc->sc_ah; 5168 u_int32_t rfilt; 5169 5170 /* XXX calibration timer? */ 5171 5172 ATH_LOCK(sc); 5173 sc->sc_scanning = 1; 5174 sc->sc_syncbeacon = 0; 5175 rfilt = ath_calcrxfilter(sc); 5176 ATH_UNLOCK(sc); 5177 5178 ATH_PCU_LOCK(sc); 5179 ath_hal_setrxfilter(ah, rfilt); 5180 ath_hal_setassocid(ah, ifp->if_broadcastaddr, 0); 5181 ATH_PCU_UNLOCK(sc); 5182 5183 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0\n", 5184 __func__, rfilt, ether_sprintf(ifp->if_broadcastaddr)); 5185 } 5186 5187 static void 5188 ath_scan_end(struct ieee80211com *ic) 5189 { 5190 struct ifnet *ifp = ic->ic_ifp; 5191 struct ath_softc *sc = ifp->if_softc; 5192 struct ath_hal *ah = sc->sc_ah; 5193 u_int32_t rfilt; 5194 5195 ATH_LOCK(sc); 5196 sc->sc_scanning = 0; 5197 rfilt = ath_calcrxfilter(sc); 5198 ATH_UNLOCK(sc); 5199 5200 ATH_PCU_LOCK(sc); 5201 ath_hal_setrxfilter(ah, rfilt); 5202 ath_hal_setassocid(ah, sc->sc_curbssid, sc->sc_curaid); 5203 5204 ath_hal_process_noisefloor(ah); 5205 ATH_PCU_UNLOCK(sc); 5206 5207 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0x%x\n", 5208 __func__, rfilt, ether_sprintf(sc->sc_curbssid), 5209 sc->sc_curaid); 5210 } 5211 5212 #ifdef ATH_ENABLE_11N 5213 /* 5214 * For now, just do a channel change. 5215 * 5216 * Later, we'll go through the hard slog of suspending tx/rx, changing rate 5217 * control state and resetting the hardware without dropping frames out 5218 * of the queue. 5219 * 5220 * The unfortunate trouble here is making absolutely sure that the 5221 * channel width change has propagated enough so the hardware 5222 * absolutely isn't handed bogus frames for it's current operating 5223 * mode. (Eg, 40MHz frames in 20MHz mode.) Since TX and RX can and 5224 * does occur in parallel, we need to make certain we've blocked 5225 * any further ongoing TX (and RX, that can cause raw TX) 5226 * before we do this. 5227 */ 5228 static void 5229 ath_update_chw(struct ieee80211com *ic) 5230 { 5231 struct ifnet *ifp = ic->ic_ifp; 5232 struct ath_softc *sc = ifp->if_softc; 5233 5234 DPRINTF(sc, ATH_DEBUG_STATE, "%s: called\n", __func__); 5235 ath_set_channel(ic); 5236 } 5237 #endif /* ATH_ENABLE_11N */ 5238 5239 static void 5240 ath_set_channel(struct ieee80211com *ic) 5241 { 5242 struct ifnet *ifp = ic->ic_ifp; 5243 struct ath_softc *sc = ifp->if_softc; 5244 5245 (void) ath_chan_set(sc, ic->ic_curchan); 5246 /* 5247 * If we are returning to our bss channel then mark state 5248 * so the next recv'd beacon's tsf will be used to sync the 5249 * beacon timers. Note that since we only hear beacons in 5250 * sta/ibss mode this has no effect in other operating modes. 5251 */ 5252 ATH_LOCK(sc); 5253 if (!sc->sc_scanning && ic->ic_curchan == ic->ic_bsschan) 5254 sc->sc_syncbeacon = 1; 5255 ATH_UNLOCK(sc); 5256 } 5257 5258 /* 5259 * Walk the vap list and check if there any vap's in RUN state. 5260 */ 5261 static int 5262 ath_isanyrunningvaps(struct ieee80211vap *this) 5263 { 5264 struct ieee80211com *ic = this->iv_ic; 5265 struct ieee80211vap *vap; 5266 5267 IEEE80211_LOCK_ASSERT(ic); 5268 5269 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 5270 if (vap != this && vap->iv_state >= IEEE80211_S_RUN) 5271 return 1; 5272 } 5273 return 0; 5274 } 5275 5276 static int 5277 ath_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 5278 { 5279 struct ieee80211com *ic = vap->iv_ic; 5280 struct ath_softc *sc = ic->ic_ifp->if_softc; 5281 struct ath_vap *avp = ATH_VAP(vap); 5282 struct ath_hal *ah = sc->sc_ah; 5283 struct ieee80211_node *ni = NULL; 5284 int i, error, stamode; 5285 u_int32_t rfilt; 5286 int csa_run_transition = 0; 5287 5288 static const HAL_LED_STATE leds[] = { 5289 HAL_LED_INIT, /* IEEE80211_S_INIT */ 5290 HAL_LED_SCAN, /* IEEE80211_S_SCAN */ 5291 HAL_LED_AUTH, /* IEEE80211_S_AUTH */ 5292 HAL_LED_ASSOC, /* IEEE80211_S_ASSOC */ 5293 HAL_LED_RUN, /* IEEE80211_S_CAC */ 5294 HAL_LED_RUN, /* IEEE80211_S_RUN */ 5295 HAL_LED_RUN, /* IEEE80211_S_CSA */ 5296 HAL_LED_RUN, /* IEEE80211_S_SLEEP */ 5297 }; 5298 5299 DPRINTF(sc, ATH_DEBUG_STATE, "%s: %s -> %s\n", __func__, 5300 ieee80211_state_name[vap->iv_state], 5301 ieee80211_state_name[nstate]); 5302 5303 /* 5304 * net80211 _should_ have the comlock asserted at this point. 5305 * There are some comments around the calls to vap->iv_newstate 5306 * which indicate that it (newstate) may end up dropping the 5307 * lock. This and the subsequent lock assert check after newstate 5308 * are an attempt to catch these and figure out how/why. 5309 */ 5310 IEEE80211_LOCK_ASSERT(ic); 5311 5312 if (vap->iv_state == IEEE80211_S_CSA && nstate == IEEE80211_S_RUN) 5313 csa_run_transition = 1; 5314 5315 callout_drain(&sc->sc_cal_ch); 5316 ath_hal_setledstate(ah, leds[nstate]); /* set LED */ 5317 5318 if (nstate == IEEE80211_S_SCAN) { 5319 /* 5320 * Scanning: turn off beacon miss and don't beacon. 5321 * Mark beacon state so when we reach RUN state we'll 5322 * [re]setup beacons. Unblock the task q thread so 5323 * deferred interrupt processing is done. 5324 */ 5325 ath_hal_intrset(ah, 5326 sc->sc_imask &~ (HAL_INT_SWBA | HAL_INT_BMISS)); 5327 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 5328 sc->sc_beacons = 0; 5329 taskqueue_unblock(sc->sc_tq); 5330 } 5331 5332 ni = ieee80211_ref_node(vap->iv_bss); 5333 rfilt = ath_calcrxfilter(sc); 5334 stamode = (vap->iv_opmode == IEEE80211_M_STA || 5335 vap->iv_opmode == IEEE80211_M_AHDEMO || 5336 vap->iv_opmode == IEEE80211_M_IBSS); 5337 if (stamode && nstate == IEEE80211_S_RUN) { 5338 sc->sc_curaid = ni->ni_associd; 5339 IEEE80211_ADDR_COPY(sc->sc_curbssid, ni->ni_bssid); 5340 ath_hal_setassocid(ah, sc->sc_curbssid, sc->sc_curaid); 5341 } 5342 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0x%x\n", 5343 __func__, rfilt, ether_sprintf(sc->sc_curbssid), sc->sc_curaid); 5344 ath_hal_setrxfilter(ah, rfilt); 5345 5346 /* XXX is this to restore keycache on resume? */ 5347 if (vap->iv_opmode != IEEE80211_M_STA && 5348 (vap->iv_flags & IEEE80211_F_PRIVACY)) { 5349 for (i = 0; i < IEEE80211_WEP_NKID; i++) 5350 if (ath_hal_keyisvalid(ah, i)) 5351 ath_hal_keysetmac(ah, i, ni->ni_bssid); 5352 } 5353 5354 /* 5355 * Invoke the parent method to do net80211 work. 5356 */ 5357 error = avp->av_newstate(vap, nstate, arg); 5358 if (error != 0) 5359 goto bad; 5360 5361 /* 5362 * See above: ensure av_newstate() doesn't drop the lock 5363 * on us. 5364 */ 5365 IEEE80211_LOCK_ASSERT(ic); 5366 5367 if (nstate == IEEE80211_S_RUN) { 5368 /* NB: collect bss node again, it may have changed */ 5369 ieee80211_free_node(ni); 5370 ni = ieee80211_ref_node(vap->iv_bss); 5371 5372 DPRINTF(sc, ATH_DEBUG_STATE, 5373 "%s(RUN): iv_flags 0x%08x bintvl %d bssid %s " 5374 "capinfo 0x%04x chan %d\n", __func__, 5375 vap->iv_flags, ni->ni_intval, ether_sprintf(ni->ni_bssid), 5376 ni->ni_capinfo, ieee80211_chan2ieee(ic, ic->ic_curchan)); 5377 5378 switch (vap->iv_opmode) { 5379 #ifdef IEEE80211_SUPPORT_TDMA 5380 case IEEE80211_M_AHDEMO: 5381 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 5382 break; 5383 /* fall thru... */ 5384 #endif 5385 case IEEE80211_M_HOSTAP: 5386 case IEEE80211_M_IBSS: 5387 case IEEE80211_M_MBSS: 5388 /* 5389 * Allocate and setup the beacon frame. 5390 * 5391 * Stop any previous beacon DMA. This may be 5392 * necessary, for example, when an ibss merge 5393 * causes reconfiguration; there will be a state 5394 * transition from RUN->RUN that means we may 5395 * be called with beacon transmission active. 5396 */ 5397 ath_hal_stoptxdma(ah, sc->sc_bhalq); 5398 5399 error = ath_beacon_alloc(sc, ni); 5400 if (error != 0) 5401 goto bad; 5402 /* 5403 * If joining an adhoc network defer beacon timer 5404 * configuration to the next beacon frame so we 5405 * have a current TSF to use. Otherwise we're 5406 * starting an ibss/bss so there's no need to delay; 5407 * if this is the first vap moving to RUN state, then 5408 * beacon state needs to be [re]configured. 5409 */ 5410 if (vap->iv_opmode == IEEE80211_M_IBSS && 5411 ni->ni_tstamp.tsf != 0) { 5412 sc->sc_syncbeacon = 1; 5413 } else if (!sc->sc_beacons) { 5414 #ifdef IEEE80211_SUPPORT_TDMA 5415 if (vap->iv_caps & IEEE80211_C_TDMA) 5416 ath_tdma_config(sc, vap); 5417 else 5418 #endif 5419 ath_beacon_config(sc, vap); 5420 sc->sc_beacons = 1; 5421 } 5422 break; 5423 case IEEE80211_M_STA: 5424 /* 5425 * Defer beacon timer configuration to the next 5426 * beacon frame so we have a current TSF to use 5427 * (any TSF collected when scanning is likely old). 5428 * However if it's due to a CSA -> RUN transition, 5429 * force a beacon update so we pick up a lack of 5430 * beacons from an AP in CAC and thus force a 5431 * scan. 5432 * 5433 * And, there's also corner cases here where 5434 * after a scan, the AP may have disappeared. 5435 * In that case, we may not receive an actual 5436 * beacon to update the beacon timer and thus we 5437 * won't get notified of the missing beacons. 5438 */ 5439 sc->sc_syncbeacon = 1; 5440 #if 0 5441 if (csa_run_transition) 5442 #endif 5443 ath_beacon_config(sc, vap); 5444 5445 /* 5446 * PR: kern/175227 5447 * 5448 * Reconfigure beacons during reset; as otherwise 5449 * we won't get the beacon timers reprogrammed 5450 * after a reset and thus we won't pick up a 5451 * beacon miss interrupt. 5452 * 5453 * Hopefully we'll see a beacon before the BMISS 5454 * timer fires (too often), leading to a STA 5455 * disassociation. 5456 */ 5457 sc->sc_beacons = 1; 5458 break; 5459 case IEEE80211_M_MONITOR: 5460 /* 5461 * Monitor mode vaps have only INIT->RUN and RUN->RUN 5462 * transitions so we must re-enable interrupts here to 5463 * handle the case of a single monitor mode vap. 5464 */ 5465 ath_hal_intrset(ah, sc->sc_imask); 5466 break; 5467 case IEEE80211_M_WDS: 5468 break; 5469 default: 5470 break; 5471 } 5472 /* 5473 * Let the hal process statistics collected during a 5474 * scan so it can provide calibrated noise floor data. 5475 */ 5476 ath_hal_process_noisefloor(ah); 5477 /* 5478 * Reset rssi stats; maybe not the best place... 5479 */ 5480 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER; 5481 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER; 5482 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER; 5483 /* 5484 * Finally, start any timers and the task q thread 5485 * (in case we didn't go through SCAN state). 5486 */ 5487 if (ath_longcalinterval != 0) { 5488 /* start periodic recalibration timer */ 5489 callout_reset(&sc->sc_cal_ch, 1, ath_calibrate, sc); 5490 } else { 5491 DPRINTF(sc, ATH_DEBUG_CALIBRATE, 5492 "%s: calibration disabled\n", __func__); 5493 } 5494 taskqueue_unblock(sc->sc_tq); 5495 } else if (nstate == IEEE80211_S_INIT) { 5496 /* 5497 * If there are no vaps left in RUN state then 5498 * shutdown host/driver operation: 5499 * o disable interrupts 5500 * o disable the task queue thread 5501 * o mark beacon processing as stopped 5502 */ 5503 if (!ath_isanyrunningvaps(vap)) { 5504 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 5505 /* disable interrupts */ 5506 ath_hal_intrset(ah, sc->sc_imask &~ HAL_INT_GLOBAL); 5507 taskqueue_block(sc->sc_tq); 5508 sc->sc_beacons = 0; 5509 } 5510 #ifdef IEEE80211_SUPPORT_TDMA 5511 ath_hal_setcca(ah, AH_TRUE); 5512 #endif 5513 } 5514 bad: 5515 ieee80211_free_node(ni); 5516 return error; 5517 } 5518 5519 /* 5520 * Allocate a key cache slot to the station so we can 5521 * setup a mapping from key index to node. The key cache 5522 * slot is needed for managing antenna state and for 5523 * compression when stations do not use crypto. We do 5524 * it uniliaterally here; if crypto is employed this slot 5525 * will be reassigned. 5526 */ 5527 static void 5528 ath_setup_stationkey(struct ieee80211_node *ni) 5529 { 5530 struct ieee80211vap *vap = ni->ni_vap; 5531 struct ath_softc *sc = vap->iv_ic->ic_ifp->if_softc; 5532 ieee80211_keyix keyix, rxkeyix; 5533 5534 /* XXX should take a locked ref to vap->iv_bss */ 5535 if (!ath_key_alloc(vap, &ni->ni_ucastkey, &keyix, &rxkeyix)) { 5536 /* 5537 * Key cache is full; we'll fall back to doing 5538 * the more expensive lookup in software. Note 5539 * this also means no h/w compression. 5540 */ 5541 /* XXX msg+statistic */ 5542 } else { 5543 /* XXX locking? */ 5544 ni->ni_ucastkey.wk_keyix = keyix; 5545 ni->ni_ucastkey.wk_rxkeyix = rxkeyix; 5546 /* NB: must mark device key to get called back on delete */ 5547 ni->ni_ucastkey.wk_flags |= IEEE80211_KEY_DEVKEY; 5548 IEEE80211_ADDR_COPY(ni->ni_ucastkey.wk_macaddr, ni->ni_macaddr); 5549 /* NB: this will create a pass-thru key entry */ 5550 ath_keyset(sc, vap, &ni->ni_ucastkey, vap->iv_bss); 5551 } 5552 } 5553 5554 /* 5555 * Setup driver-specific state for a newly associated node. 5556 * Note that we're called also on a re-associate, the isnew 5557 * param tells us if this is the first time or not. 5558 */ 5559 static void 5560 ath_newassoc(struct ieee80211_node *ni, int isnew) 5561 { 5562 struct ath_node *an = ATH_NODE(ni); 5563 struct ieee80211vap *vap = ni->ni_vap; 5564 struct ath_softc *sc = vap->iv_ic->ic_ifp->if_softc; 5565 const struct ieee80211_txparam *tp = ni->ni_txparms; 5566 5567 an->an_mcastrix = ath_tx_findrix(sc, tp->mcastrate); 5568 an->an_mgmtrix = ath_tx_findrix(sc, tp->mgmtrate); 5569 5570 ath_rate_newassoc(sc, an, isnew); 5571 5572 if (isnew && 5573 (vap->iv_flags & IEEE80211_F_PRIVACY) == 0 && sc->sc_hasclrkey && 5574 ni->ni_ucastkey.wk_keyix == IEEE80211_KEYIX_NONE) 5575 ath_setup_stationkey(ni); 5576 5577 /* 5578 * If we're reassociating, make sure that any paused queues 5579 * get unpaused. 5580 * 5581 * Now, we may hvae frames in the hardware queue for this node. 5582 * So if we are reassociating and there are frames in the queue, 5583 * we need to go through the cleanup path to ensure that they're 5584 * marked as non-aggregate. 5585 */ 5586 if (! isnew) { 5587 DPRINTF(sc, ATH_DEBUG_NODE, 5588 "%s: %6D: reassoc; is_powersave=%d\n", 5589 __func__, 5590 ni->ni_macaddr, 5591 ":", 5592 an->an_is_powersave); 5593 5594 /* XXX for now, we can't hold the lock across assoc */ 5595 ath_tx_node_reassoc(sc, an); 5596 5597 /* XXX for now, we can't hold the lock across wakeup */ 5598 if (an->an_is_powersave) 5599 ath_tx_node_wakeup(sc, an); 5600 } 5601 } 5602 5603 static int 5604 ath_setregdomain(struct ieee80211com *ic, struct ieee80211_regdomain *reg, 5605 int nchans, struct ieee80211_channel chans[]) 5606 { 5607 struct ath_softc *sc = ic->ic_ifp->if_softc; 5608 struct ath_hal *ah = sc->sc_ah; 5609 HAL_STATUS status; 5610 5611 DPRINTF(sc, ATH_DEBUG_REGDOMAIN, 5612 "%s: rd %u cc %u location %c%s\n", 5613 __func__, reg->regdomain, reg->country, reg->location, 5614 reg->ecm ? " ecm" : ""); 5615 5616 status = ath_hal_set_channels(ah, chans, nchans, 5617 reg->country, reg->regdomain); 5618 if (status != HAL_OK) { 5619 DPRINTF(sc, ATH_DEBUG_REGDOMAIN, "%s: failed, status %u\n", 5620 __func__, status); 5621 return EINVAL; /* XXX */ 5622 } 5623 5624 return 0; 5625 } 5626 5627 static void 5628 ath_getradiocaps(struct ieee80211com *ic, 5629 int maxchans, int *nchans, struct ieee80211_channel chans[]) 5630 { 5631 struct ath_softc *sc = ic->ic_ifp->if_softc; 5632 struct ath_hal *ah = sc->sc_ah; 5633 5634 DPRINTF(sc, ATH_DEBUG_REGDOMAIN, "%s: use rd %u cc %d\n", 5635 __func__, SKU_DEBUG, CTRY_DEFAULT); 5636 5637 /* XXX check return */ 5638 (void) ath_hal_getchannels(ah, chans, maxchans, nchans, 5639 HAL_MODE_ALL, CTRY_DEFAULT, SKU_DEBUG, AH_TRUE); 5640 5641 } 5642 5643 static int 5644 ath_getchannels(struct ath_softc *sc) 5645 { 5646 struct ifnet *ifp = sc->sc_ifp; 5647 struct ieee80211com *ic = ifp->if_l2com; 5648 struct ath_hal *ah = sc->sc_ah; 5649 HAL_STATUS status; 5650 5651 /* 5652 * Collect channel set based on EEPROM contents. 5653 */ 5654 status = ath_hal_init_channels(ah, ic->ic_channels, IEEE80211_CHAN_MAX, 5655 &ic->ic_nchans, HAL_MODE_ALL, CTRY_DEFAULT, SKU_NONE, AH_TRUE); 5656 if (status != HAL_OK) { 5657 if_printf(ifp, "%s: unable to collect channel list from hal, " 5658 "status %d\n", __func__, status); 5659 return EINVAL; 5660 } 5661 (void) ath_hal_getregdomain(ah, &sc->sc_eerd); 5662 ath_hal_getcountrycode(ah, &sc->sc_eecc); /* NB: cannot fail */ 5663 /* XXX map Atheros sku's to net80211 SKU's */ 5664 /* XXX net80211 types too small */ 5665 ic->ic_regdomain.regdomain = (uint16_t) sc->sc_eerd; 5666 ic->ic_regdomain.country = (uint16_t) sc->sc_eecc; 5667 ic->ic_regdomain.isocc[0] = ' '; /* XXX don't know */ 5668 ic->ic_regdomain.isocc[1] = ' '; 5669 5670 ic->ic_regdomain.ecm = 1; 5671 ic->ic_regdomain.location = 'I'; 5672 5673 DPRINTF(sc, ATH_DEBUG_REGDOMAIN, 5674 "%s: eeprom rd %u cc %u (mapped rd %u cc %u) location %c%s\n", 5675 __func__, sc->sc_eerd, sc->sc_eecc, 5676 ic->ic_regdomain.regdomain, ic->ic_regdomain.country, 5677 ic->ic_regdomain.location, ic->ic_regdomain.ecm ? " ecm" : ""); 5678 return 0; 5679 } 5680 5681 static int 5682 ath_rate_setup(struct ath_softc *sc, u_int mode) 5683 { 5684 struct ath_hal *ah = sc->sc_ah; 5685 const HAL_RATE_TABLE *rt; 5686 5687 switch (mode) { 5688 case IEEE80211_MODE_11A: 5689 rt = ath_hal_getratetable(ah, HAL_MODE_11A); 5690 break; 5691 case IEEE80211_MODE_HALF: 5692 rt = ath_hal_getratetable(ah, HAL_MODE_11A_HALF_RATE); 5693 break; 5694 case IEEE80211_MODE_QUARTER: 5695 rt = ath_hal_getratetable(ah, HAL_MODE_11A_QUARTER_RATE); 5696 break; 5697 case IEEE80211_MODE_11B: 5698 rt = ath_hal_getratetable(ah, HAL_MODE_11B); 5699 break; 5700 case IEEE80211_MODE_11G: 5701 rt = ath_hal_getratetable(ah, HAL_MODE_11G); 5702 break; 5703 case IEEE80211_MODE_TURBO_A: 5704 rt = ath_hal_getratetable(ah, HAL_MODE_108A); 5705 break; 5706 case IEEE80211_MODE_TURBO_G: 5707 rt = ath_hal_getratetable(ah, HAL_MODE_108G); 5708 break; 5709 case IEEE80211_MODE_STURBO_A: 5710 rt = ath_hal_getratetable(ah, HAL_MODE_TURBO); 5711 break; 5712 case IEEE80211_MODE_11NA: 5713 rt = ath_hal_getratetable(ah, HAL_MODE_11NA_HT20); 5714 break; 5715 case IEEE80211_MODE_11NG: 5716 rt = ath_hal_getratetable(ah, HAL_MODE_11NG_HT20); 5717 break; 5718 default: 5719 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid mode %u\n", 5720 __func__, mode); 5721 return 0; 5722 } 5723 sc->sc_rates[mode] = rt; 5724 return (rt != NULL); 5725 } 5726 5727 static void 5728 ath_setcurmode(struct ath_softc *sc, enum ieee80211_phymode mode) 5729 { 5730 #define N(a) (sizeof(a)/sizeof(a[0])) 5731 /* NB: on/off times from the Atheros NDIS driver, w/ permission */ 5732 static const struct { 5733 u_int rate; /* tx/rx 802.11 rate */ 5734 u_int16_t timeOn; /* LED on time (ms) */ 5735 u_int16_t timeOff; /* LED off time (ms) */ 5736 } blinkrates[] = { 5737 { 108, 40, 10 }, 5738 { 96, 44, 11 }, 5739 { 72, 50, 13 }, 5740 { 48, 57, 14 }, 5741 { 36, 67, 16 }, 5742 { 24, 80, 20 }, 5743 { 22, 100, 25 }, 5744 { 18, 133, 34 }, 5745 { 12, 160, 40 }, 5746 { 10, 200, 50 }, 5747 { 6, 240, 58 }, 5748 { 4, 267, 66 }, 5749 { 2, 400, 100 }, 5750 { 0, 500, 130 }, 5751 /* XXX half/quarter rates */ 5752 }; 5753 const HAL_RATE_TABLE *rt; 5754 int i, j; 5755 5756 memset(sc->sc_rixmap, 0xff, sizeof(sc->sc_rixmap)); 5757 rt = sc->sc_rates[mode]; 5758 KASSERT(rt != NULL, ("no h/w rate set for phy mode %u", mode)); 5759 for (i = 0; i < rt->rateCount; i++) { 5760 uint8_t ieeerate = rt->info[i].dot11Rate & IEEE80211_RATE_VAL; 5761 if (rt->info[i].phy != IEEE80211_T_HT) 5762 sc->sc_rixmap[ieeerate] = i; 5763 else 5764 sc->sc_rixmap[ieeerate | IEEE80211_RATE_MCS] = i; 5765 } 5766 memset(sc->sc_hwmap, 0, sizeof(sc->sc_hwmap)); 5767 for (i = 0; i < N(sc->sc_hwmap); i++) { 5768 if (i >= rt->rateCount) { 5769 sc->sc_hwmap[i].ledon = (500 * hz) / 1000; 5770 sc->sc_hwmap[i].ledoff = (130 * hz) / 1000; 5771 continue; 5772 } 5773 sc->sc_hwmap[i].ieeerate = 5774 rt->info[i].dot11Rate & IEEE80211_RATE_VAL; 5775 if (rt->info[i].phy == IEEE80211_T_HT) 5776 sc->sc_hwmap[i].ieeerate |= IEEE80211_RATE_MCS; 5777 sc->sc_hwmap[i].txflags = IEEE80211_RADIOTAP_F_DATAPAD; 5778 if (rt->info[i].shortPreamble || 5779 rt->info[i].phy == IEEE80211_T_OFDM) 5780 sc->sc_hwmap[i].txflags |= IEEE80211_RADIOTAP_F_SHORTPRE; 5781 sc->sc_hwmap[i].rxflags = sc->sc_hwmap[i].txflags; 5782 for (j = 0; j < N(blinkrates)-1; j++) 5783 if (blinkrates[j].rate == sc->sc_hwmap[i].ieeerate) 5784 break; 5785 /* NB: this uses the last entry if the rate isn't found */ 5786 /* XXX beware of overlow */ 5787 sc->sc_hwmap[i].ledon = (blinkrates[j].timeOn * hz) / 1000; 5788 sc->sc_hwmap[i].ledoff = (blinkrates[j].timeOff * hz) / 1000; 5789 } 5790 sc->sc_currates = rt; 5791 sc->sc_curmode = mode; 5792 /* 5793 * All protection frames are transmited at 2Mb/s for 5794 * 11g, otherwise at 1Mb/s. 5795 */ 5796 if (mode == IEEE80211_MODE_11G) 5797 sc->sc_protrix = ath_tx_findrix(sc, 2*2); 5798 else 5799 sc->sc_protrix = ath_tx_findrix(sc, 2*1); 5800 /* NB: caller is responsible for resetting rate control state */ 5801 #undef N 5802 } 5803 5804 static void 5805 ath_watchdog(void *arg) 5806 { 5807 struct ath_softc *sc = arg; 5808 int do_reset = 0; 5809 5810 if (sc->sc_wd_timer != 0 && --sc->sc_wd_timer == 0) { 5811 struct ifnet *ifp = sc->sc_ifp; 5812 uint32_t hangs; 5813 5814 if (ath_hal_gethangstate(sc->sc_ah, 0xffff, &hangs) && 5815 hangs != 0) { 5816 if_printf(ifp, "%s hang detected (0x%x)\n", 5817 hangs & 0xff ? "bb" : "mac", hangs); 5818 } else 5819 if_printf(ifp, "device timeout\n"); 5820 do_reset = 1; 5821 ifp->if_oerrors++; 5822 sc->sc_stats.ast_watchdog++; 5823 } 5824 5825 /* 5826 * We can't hold the lock across the ath_reset() call. 5827 * 5828 * And since this routine can't hold a lock and sleep, 5829 * do the reset deferred. 5830 */ 5831 if (do_reset) { 5832 taskqueue_enqueue(sc->sc_tq, &sc->sc_resettask); 5833 } 5834 5835 callout_schedule(&sc->sc_wd_ch, hz); 5836 } 5837 5838 /* 5839 * Fetch the rate control statistics for the given node. 5840 */ 5841 static int 5842 ath_ioctl_ratestats(struct ath_softc *sc, struct ath_rateioctl *rs) 5843 { 5844 struct ath_node *an; 5845 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 5846 struct ieee80211_node *ni; 5847 int error = 0; 5848 5849 /* Perform a lookup on the given node */ 5850 ni = ieee80211_find_node(&ic->ic_sta, rs->is_u.macaddr); 5851 if (ni == NULL) { 5852 error = EINVAL; 5853 goto bad; 5854 } 5855 5856 /* Lock the ath_node */ 5857 an = ATH_NODE(ni); 5858 ATH_NODE_LOCK(an); 5859 5860 /* Fetch the rate control stats for this node */ 5861 error = ath_rate_fetch_node_stats(sc, an, rs); 5862 5863 /* No matter what happens here, just drop through */ 5864 5865 /* Unlock the ath_node */ 5866 ATH_NODE_UNLOCK(an); 5867 5868 /* Unref the node */ 5869 ieee80211_node_decref(ni); 5870 5871 bad: 5872 return (error); 5873 } 5874 5875 #ifdef ATH_DIAGAPI 5876 /* 5877 * Diagnostic interface to the HAL. This is used by various 5878 * tools to do things like retrieve register contents for 5879 * debugging. The mechanism is intentionally opaque so that 5880 * it can change frequently w/o concern for compatiblity. 5881 */ 5882 static int 5883 ath_ioctl_diag(struct ath_softc *sc, struct ath_diag *ad) 5884 { 5885 struct ath_hal *ah = sc->sc_ah; 5886 u_int id = ad->ad_id & ATH_DIAG_ID; 5887 void *indata = NULL; 5888 void *outdata = NULL; 5889 u_int32_t insize = ad->ad_in_size; 5890 u_int32_t outsize = ad->ad_out_size; 5891 int error = 0; 5892 5893 if (ad->ad_id & ATH_DIAG_IN) { 5894 /* 5895 * Copy in data. 5896 */ 5897 indata = malloc(insize, M_TEMP, M_NOWAIT); 5898 if (indata == NULL) { 5899 error = ENOMEM; 5900 goto bad; 5901 } 5902 error = copyin(ad->ad_in_data, indata, insize); 5903 if (error) 5904 goto bad; 5905 } 5906 if (ad->ad_id & ATH_DIAG_DYN) { 5907 /* 5908 * Allocate a buffer for the results (otherwise the HAL 5909 * returns a pointer to a buffer where we can read the 5910 * results). Note that we depend on the HAL leaving this 5911 * pointer for us to use below in reclaiming the buffer; 5912 * may want to be more defensive. 5913 */ 5914 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 5915 if (outdata == NULL) { 5916 error = ENOMEM; 5917 goto bad; 5918 } 5919 } 5920 if (ath_hal_getdiagstate(ah, id, indata, insize, &outdata, &outsize)) { 5921 if (outsize < ad->ad_out_size) 5922 ad->ad_out_size = outsize; 5923 if (outdata != NULL) 5924 error = copyout(outdata, ad->ad_out_data, 5925 ad->ad_out_size); 5926 } else { 5927 error = EINVAL; 5928 } 5929 bad: 5930 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 5931 free(indata, M_TEMP); 5932 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 5933 free(outdata, M_TEMP); 5934 return error; 5935 } 5936 #endif /* ATH_DIAGAPI */ 5937 5938 static int 5939 ath_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 5940 { 5941 #define IS_RUNNING(ifp) \ 5942 ((ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING)) 5943 struct ath_softc *sc = ifp->if_softc; 5944 struct ieee80211com *ic = ifp->if_l2com; 5945 struct ifreq *ifr = (struct ifreq *)data; 5946 const HAL_RATE_TABLE *rt; 5947 int error = 0; 5948 5949 switch (cmd) { 5950 case SIOCSIFFLAGS: 5951 ATH_LOCK(sc); 5952 if (IS_RUNNING(ifp)) { 5953 /* 5954 * To avoid rescanning another access point, 5955 * do not call ath_init() here. Instead, 5956 * only reflect promisc mode settings. 5957 */ 5958 ath_mode_init(sc); 5959 } else if (ifp->if_flags & IFF_UP) { 5960 /* 5961 * Beware of being called during attach/detach 5962 * to reset promiscuous mode. In that case we 5963 * will still be marked UP but not RUNNING. 5964 * However trying to re-init the interface 5965 * is the wrong thing to do as we've already 5966 * torn down much of our state. There's 5967 * probably a better way to deal with this. 5968 */ 5969 if (!sc->sc_invalid) 5970 ath_init(sc); /* XXX lose error */ 5971 } else { 5972 ath_stop_locked(ifp); 5973 #ifdef notyet 5974 /* XXX must wakeup in places like ath_vap_delete */ 5975 if (!sc->sc_invalid) 5976 ath_hal_setpower(sc->sc_ah, HAL_PM_FULL_SLEEP); 5977 #endif 5978 } 5979 ATH_UNLOCK(sc); 5980 break; 5981 case SIOCGIFMEDIA: 5982 case SIOCSIFMEDIA: 5983 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd); 5984 break; 5985 case SIOCGATHSTATS: 5986 /* NB: embed these numbers to get a consistent view */ 5987 sc->sc_stats.ast_tx_packets = ifp->if_opackets; 5988 sc->sc_stats.ast_rx_packets = ifp->if_ipackets; 5989 sc->sc_stats.ast_tx_rssi = ATH_RSSI(sc->sc_halstats.ns_avgtxrssi); 5990 sc->sc_stats.ast_rx_rssi = ATH_RSSI(sc->sc_halstats.ns_avgrssi); 5991 #ifdef IEEE80211_SUPPORT_TDMA 5992 sc->sc_stats.ast_tdma_tsfadjp = TDMA_AVG(sc->sc_avgtsfdeltap); 5993 sc->sc_stats.ast_tdma_tsfadjm = TDMA_AVG(sc->sc_avgtsfdeltam); 5994 #endif 5995 rt = sc->sc_currates; 5996 sc->sc_stats.ast_tx_rate = 5997 rt->info[sc->sc_txrix].dot11Rate &~ IEEE80211_RATE_BASIC; 5998 if (rt->info[sc->sc_txrix].phy & IEEE80211_T_HT) 5999 sc->sc_stats.ast_tx_rate |= IEEE80211_RATE_MCS; 6000 return copyout(&sc->sc_stats, 6001 ifr->ifr_data, sizeof (sc->sc_stats)); 6002 case SIOCGATHAGSTATS: 6003 return copyout(&sc->sc_aggr_stats, 6004 ifr->ifr_data, sizeof (sc->sc_aggr_stats)); 6005 case SIOCZATHSTATS: 6006 error = priv_check(curthread, PRIV_DRIVER); 6007 if (error == 0) { 6008 memset(&sc->sc_stats, 0, sizeof(sc->sc_stats)); 6009 memset(&sc->sc_aggr_stats, 0, 6010 sizeof(sc->sc_aggr_stats)); 6011 memset(&sc->sc_intr_stats, 0, 6012 sizeof(sc->sc_intr_stats)); 6013 } 6014 break; 6015 #ifdef ATH_DIAGAPI 6016 case SIOCGATHDIAG: 6017 error = ath_ioctl_diag(sc, (struct ath_diag *) ifr); 6018 break; 6019 case SIOCGATHPHYERR: 6020 error = ath_ioctl_phyerr(sc,(struct ath_diag*) ifr); 6021 break; 6022 #endif 6023 case SIOCGATHSPECTRAL: 6024 error = ath_ioctl_spectral(sc,(struct ath_diag*) ifr); 6025 break; 6026 case SIOCGATHNODERATESTATS: 6027 error = ath_ioctl_ratestats(sc, (struct ath_rateioctl *) ifr); 6028 break; 6029 case SIOCGIFADDR: 6030 error = ether_ioctl(ifp, cmd, data); 6031 break; 6032 default: 6033 error = EINVAL; 6034 break; 6035 } 6036 return error; 6037 #undef IS_RUNNING 6038 } 6039 6040 /* 6041 * Announce various information on device/driver attach. 6042 */ 6043 static void 6044 ath_announce(struct ath_softc *sc) 6045 { 6046 struct ifnet *ifp = sc->sc_ifp; 6047 struct ath_hal *ah = sc->sc_ah; 6048 6049 if_printf(ifp, "AR%s mac %d.%d RF%s phy %d.%d\n", 6050 ath_hal_mac_name(ah), ah->ah_macVersion, ah->ah_macRev, 6051 ath_hal_rf_name(ah), ah->ah_phyRev >> 4, ah->ah_phyRev & 0xf); 6052 if_printf(ifp, "2GHz radio: 0x%.4x; 5GHz radio: 0x%.4x\n", 6053 ah->ah_analog2GhzRev, ah->ah_analog5GhzRev); 6054 if (bootverbose) { 6055 int i; 6056 for (i = 0; i <= WME_AC_VO; i++) { 6057 struct ath_txq *txq = sc->sc_ac2q[i]; 6058 if_printf(ifp, "Use hw queue %u for %s traffic\n", 6059 txq->axq_qnum, ieee80211_wme_acnames[i]); 6060 } 6061 if_printf(ifp, "Use hw queue %u for CAB traffic\n", 6062 sc->sc_cabq->axq_qnum); 6063 if_printf(ifp, "Use hw queue %u for beacons\n", sc->sc_bhalq); 6064 } 6065 if (ath_rxbuf != ATH_RXBUF) 6066 if_printf(ifp, "using %u rx buffers\n", ath_rxbuf); 6067 if (ath_txbuf != ATH_TXBUF) 6068 if_printf(ifp, "using %u tx buffers\n", ath_txbuf); 6069 if (sc->sc_mcastkey && bootverbose) 6070 if_printf(ifp, "using multicast key search\n"); 6071 } 6072 6073 static void 6074 ath_dfs_tasklet(void *p, int npending) 6075 { 6076 struct ath_softc *sc = (struct ath_softc *) p; 6077 struct ifnet *ifp = sc->sc_ifp; 6078 struct ieee80211com *ic = ifp->if_l2com; 6079 6080 /* 6081 * If previous processing has found a radar event, 6082 * signal this to the net80211 layer to begin DFS 6083 * processing. 6084 */ 6085 if (ath_dfs_process_radar_event(sc, sc->sc_curchan)) { 6086 /* DFS event found, initiate channel change */ 6087 /* 6088 * XXX doesn't currently tell us whether the event 6089 * XXX was found in the primary or extension 6090 * XXX channel! 6091 */ 6092 IEEE80211_LOCK(ic); 6093 ieee80211_dfs_notify_radar(ic, sc->sc_curchan); 6094 IEEE80211_UNLOCK(ic); 6095 } 6096 } 6097 6098 /* 6099 * Enable/disable power save. This must be called with 6100 * no TX driver locks currently held, so it should only 6101 * be called from the RX path (which doesn't hold any 6102 * TX driver locks.) 6103 */ 6104 static void 6105 ath_node_powersave(struct ieee80211_node *ni, int enable) 6106 { 6107 #ifdef ATH_SW_PSQ 6108 struct ath_node *an = ATH_NODE(ni); 6109 struct ieee80211com *ic = ni->ni_ic; 6110 struct ath_softc *sc = ic->ic_ifp->if_softc; 6111 struct ath_vap *avp = ATH_VAP(ni->ni_vap); 6112 6113 /* XXX and no TXQ locks should be held here */ 6114 6115 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, "%s: %6D: enable=%d\n", 6116 __func__, 6117 ni->ni_macaddr, 6118 ":", 6119 !! enable); 6120 6121 /* Suspend or resume software queue handling */ 6122 if (enable) 6123 ath_tx_node_sleep(sc, an); 6124 else 6125 ath_tx_node_wakeup(sc, an); 6126 6127 /* Update net80211 state */ 6128 avp->av_node_ps(ni, enable); 6129 #else 6130 struct ath_vap *avp = ATH_VAP(ni->ni_vap); 6131 6132 /* Update net80211 state */ 6133 avp->av_node_ps(ni, enable); 6134 #endif/* ATH_SW_PSQ */ 6135 } 6136 6137 /* 6138 * Notification from net80211 that the powersave queue state has 6139 * changed. 6140 * 6141 * Since the software queue also may have some frames: 6142 * 6143 * + if the node software queue has frames and the TID state 6144 * is 0, we set the TIM; 6145 * + if the node and the stack are both empty, we clear the TIM bit. 6146 * + If the stack tries to set the bit, always set it. 6147 * + If the stack tries to clear the bit, only clear it if the 6148 * software queue in question is also cleared. 6149 * 6150 * TODO: this is called during node teardown; so let's ensure this 6151 * is all correctly handled and that the TIM bit is cleared. 6152 * It may be that the node flush is called _AFTER_ the net80211 6153 * stack clears the TIM. 6154 * 6155 * Here is the racy part. Since it's possible >1 concurrent, 6156 * overlapping TXes will appear complete with a TX completion in 6157 * another thread, it's possible that the concurrent TIM calls will 6158 * clash. We can't hold the node lock here because setting the 6159 * TIM grabs the net80211 comlock and this may cause a LOR. 6160 * The solution is either to totally serialise _everything_ at 6161 * this point (ie, all TX, completion and any reset/flush go into 6162 * one taskqueue) or a new "ath TIM lock" needs to be created that 6163 * just wraps the driver state change and this call to avp->av_set_tim(). 6164 * 6165 * The same race exists in the net80211 power save queue handling 6166 * as well. Since multiple transmitting threads may queue frames 6167 * into the driver, as well as ps-poll and the driver transmitting 6168 * frames (and thus clearing the psq), it's quite possible that 6169 * a packet entering the PSQ and a ps-poll being handled will 6170 * race, causing the TIM to be cleared and not re-set. 6171 */ 6172 static int 6173 ath_node_set_tim(struct ieee80211_node *ni, int enable) 6174 { 6175 #ifdef ATH_SW_PSQ 6176 struct ieee80211com *ic = ni->ni_ic; 6177 struct ath_softc *sc = ic->ic_ifp->if_softc; 6178 struct ath_node *an = ATH_NODE(ni); 6179 struct ath_vap *avp = ATH_VAP(ni->ni_vap); 6180 int changed = 0; 6181 6182 ATH_TX_LOCK(sc); 6183 an->an_stack_psq = enable; 6184 6185 /* 6186 * This will get called for all operating modes, 6187 * even if avp->av_set_tim is unset. 6188 * It's currently set for hostap/ibss modes; but 6189 * the same infrastructure is used for both STA 6190 * and AP/IBSS node power save. 6191 */ 6192 if (avp->av_set_tim == NULL) { 6193 ATH_TX_UNLOCK(sc); 6194 return (0); 6195 } 6196 6197 /* 6198 * If setting the bit, always set it here. 6199 * If clearing the bit, only clear it if the 6200 * software queue is also empty. 6201 * 6202 * If the node has left power save, just clear the TIM 6203 * bit regardless of the state of the power save queue. 6204 * 6205 * XXX TODO: although atomics are used, it's quite possible 6206 * that a race will occur between this and setting/clearing 6207 * in another thread. TX completion will occur always in 6208 * one thread, however setting/clearing the TIM bit can come 6209 * from a variety of different process contexts! 6210 */ 6211 if (enable && an->an_tim_set == 1) { 6212 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6213 "%s: %6D: enable=%d, tim_set=1, ignoring\n", 6214 __func__, 6215 ni->ni_macaddr, 6216 ":", 6217 enable); 6218 ATH_TX_UNLOCK(sc); 6219 } else if (enable) { 6220 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6221 "%s: %6D: enable=%d, enabling TIM\n", 6222 __func__, 6223 ni->ni_macaddr, 6224 ":", 6225 enable); 6226 an->an_tim_set = 1; 6227 ATH_TX_UNLOCK(sc); 6228 changed = avp->av_set_tim(ni, enable); 6229 } else if (an->an_swq_depth == 0) { 6230 /* disable */ 6231 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6232 "%s: %6D: enable=%d, an_swq_depth == 0, disabling\n", 6233 __func__, 6234 ni->ni_macaddr, 6235 ":", 6236 enable); 6237 an->an_tim_set = 0; 6238 ATH_TX_UNLOCK(sc); 6239 changed = avp->av_set_tim(ni, enable); 6240 } else if (! an->an_is_powersave) { 6241 /* 6242 * disable regardless; the node isn't in powersave now 6243 */ 6244 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6245 "%s: %6D: enable=%d, an_pwrsave=0, disabling\n", 6246 __func__, 6247 ni->ni_macaddr, 6248 ":", 6249 enable); 6250 an->an_tim_set = 0; 6251 ATH_TX_UNLOCK(sc); 6252 changed = avp->av_set_tim(ni, enable); 6253 } else { 6254 /* 6255 * psq disable, node is currently in powersave, node 6256 * software queue isn't empty, so don't clear the TIM bit 6257 * for now. 6258 */ 6259 ATH_TX_UNLOCK(sc); 6260 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6261 "%s: %6D: enable=%d, an_swq_depth > 0, ignoring\n", 6262 __func__, 6263 ni->ni_macaddr, 6264 ":", 6265 enable); 6266 changed = 0; 6267 } 6268 6269 return (changed); 6270 #else 6271 struct ath_vap *avp = ATH_VAP(ni->ni_vap); 6272 6273 /* 6274 * Some operating modes don't set av_set_tim(), so don't 6275 * update it here. 6276 */ 6277 if (avp->av_set_tim == NULL) 6278 return (0); 6279 6280 return (avp->av_set_tim(ni, enable)); 6281 #endif /* ATH_SW_PSQ */ 6282 } 6283 6284 /* 6285 * Set or update the TIM from the software queue. 6286 * 6287 * Check the software queue depth before attempting to do lock 6288 * anything; that avoids trying to obtain the lock. Then, 6289 * re-check afterwards to ensure nothing has changed in the 6290 * meantime. 6291 * 6292 * set: This is designed to be called from the TX path, after 6293 * a frame has been queued; to see if the swq > 0. 6294 * 6295 * clear: This is designed to be called from the buffer completion point 6296 * (right now it's ath_tx_default_comp()) where the state of 6297 * a software queue has changed. 6298 * 6299 * It makes sense to place it at buffer free / completion rather 6300 * than after each software queue operation, as there's no real 6301 * point in churning the TIM bit as the last frames in the software 6302 * queue are transmitted. If they fail and we retry them, we'd 6303 * just be setting the TIM bit again anyway. 6304 */ 6305 void 6306 ath_tx_update_tim(struct ath_softc *sc, struct ieee80211_node *ni, 6307 int enable) 6308 { 6309 #ifdef ATH_SW_PSQ 6310 struct ath_node *an; 6311 struct ath_vap *avp; 6312 6313 /* Don't do this for broadcast/etc frames */ 6314 if (ni == NULL) 6315 return; 6316 6317 an = ATH_NODE(ni); 6318 avp = ATH_VAP(ni->ni_vap); 6319 6320 /* 6321 * And for operating modes without the TIM handler set, let's 6322 * just skip those. 6323 */ 6324 if (avp->av_set_tim == NULL) 6325 return; 6326 6327 ATH_TX_LOCK_ASSERT(sc); 6328 6329 if (enable) { 6330 if (an->an_is_powersave && 6331 an->an_tim_set == 0 && 6332 an->an_swq_depth != 0) { 6333 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6334 "%s: %6D: swq_depth>0, tim_set=0, set!\n", 6335 __func__, 6336 ni->ni_macaddr, 6337 ":"); 6338 an->an_tim_set = 1; 6339 (void) avp->av_set_tim(ni, 1); 6340 } 6341 } else { 6342 /* 6343 * Don't bother grabbing the lock unless the queue is empty. 6344 */ 6345 if (&an->an_swq_depth != 0) 6346 return; 6347 6348 if (an->an_is_powersave && 6349 an->an_stack_psq == 0 && 6350 an->an_tim_set == 1 && 6351 an->an_swq_depth == 0) { 6352 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6353 "%s: %6D: swq_depth=0, tim_set=1, psq_set=0," 6354 " clear!\n", 6355 __func__, 6356 ni->ni_macaddr, 6357 ":"); 6358 an->an_tim_set = 0; 6359 (void) avp->av_set_tim(ni, 0); 6360 } 6361 } 6362 #else 6363 return; 6364 #endif /* ATH_SW_PSQ */ 6365 } 6366 6367 /* 6368 * Received a ps-poll frame from net80211. 6369 * 6370 * Here we get a chance to serve out a software-queued frame ourselves 6371 * before we punt it to net80211 to transmit us one itself - either 6372 * because there's traffic in the net80211 psq, or a NULL frame to 6373 * indicate there's nothing else. 6374 */ 6375 static void 6376 ath_node_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m) 6377 { 6378 #ifdef ATH_SW_PSQ 6379 struct ath_node *an; 6380 struct ath_vap *avp; 6381 struct ieee80211com *ic = ni->ni_ic; 6382 struct ath_softc *sc = ic->ic_ifp->if_softc; 6383 int tid; 6384 6385 /* Just paranoia */ 6386 if (ni == NULL) 6387 return; 6388 6389 /* 6390 * Unassociated (temporary node) station. 6391 */ 6392 if (ni->ni_associd == 0) 6393 return; 6394 6395 /* 6396 * We do have an active node, so let's begin looking into it. 6397 */ 6398 an = ATH_NODE(ni); 6399 avp = ATH_VAP(ni->ni_vap); 6400 6401 /* 6402 * For now, we just call the original ps-poll method. 6403 * Once we're ready to flip this on: 6404 * 6405 * + Set leak to 1, as no matter what we're going to have 6406 * to send a frame; 6407 * + Check the software queue and if there's something in it, 6408 * schedule the highest TID thas has traffic from this node. 6409 * Then make sure we schedule the software scheduler to 6410 * run so it picks up said frame. 6411 * 6412 * That way whatever happens, we'll at least send _a_ frame 6413 * to the given node. 6414 * 6415 * Again, yes, it's crappy QoS if the node has multiple 6416 * TIDs worth of traffic - but let's get it working first 6417 * before we optimise it. 6418 * 6419 * Also yes, there's definitely latency here - we're not 6420 * direct dispatching to the hardware in this path (and 6421 * we're likely being called from the packet receive path, 6422 * so going back into TX may be a little hairy!) but again 6423 * I'd like to get this working first before optimising 6424 * turn-around time. 6425 */ 6426 6427 ATH_TX_LOCK(sc); 6428 6429 /* 6430 * Legacy - we're called and the node isn't asleep. 6431 * Immediately punt. 6432 */ 6433 if (! an->an_is_powersave) { 6434 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6435 "%s: %6D: not in powersave?\n", 6436 __func__, 6437 ni->ni_macaddr, 6438 ":"); 6439 ATH_TX_UNLOCK(sc); 6440 avp->av_recv_pspoll(ni, m); 6441 return; 6442 } 6443 6444 /* 6445 * We're in powersave. 6446 * 6447 * Leak a frame. 6448 */ 6449 an->an_leak_count = 1; 6450 6451 /* 6452 * Now, if there's no frames in the node, just punt to 6453 * recv_pspoll. 6454 * 6455 * Don't bother checking if the TIM bit is set, we really 6456 * only care if there are any frames here! 6457 */ 6458 if (an->an_swq_depth == 0) { 6459 ATH_TX_UNLOCK(sc); 6460 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6461 "%s: %6D: SWQ empty; punting to net80211\n", 6462 __func__, 6463 ni->ni_macaddr, 6464 ":"); 6465 avp->av_recv_pspoll(ni, m); 6466 return; 6467 } 6468 6469 /* 6470 * Ok, let's schedule the highest TID that has traffic 6471 * and then schedule something. 6472 */ 6473 for (tid = IEEE80211_TID_SIZE - 1; tid >= 0; tid--) { 6474 struct ath_tid *atid = &an->an_tid[tid]; 6475 /* 6476 * No frames? Skip. 6477 */ 6478 if (atid->axq_depth == 0) 6479 continue; 6480 ath_tx_tid_sched(sc, atid); 6481 /* 6482 * XXX we could do a direct call to the TXQ 6483 * scheduler code here to optimise latency 6484 * at the expense of a REALLY deep callstack. 6485 */ 6486 ATH_TX_UNLOCK(sc); 6487 taskqueue_enqueue(sc->sc_tq, &sc->sc_txqtask); 6488 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6489 "%s: %6D: leaking frame to TID %d\n", 6490 __func__, 6491 ni->ni_macaddr, 6492 ":", 6493 tid); 6494 return; 6495 } 6496 6497 ATH_TX_UNLOCK(sc); 6498 6499 /* 6500 * XXX nothing in the TIDs at this point? Eek. 6501 */ 6502 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6503 "%s: %6D: TIDs empty, but ath_node showed traffic?!\n", 6504 __func__, 6505 ni->ni_macaddr, 6506 ":"); 6507 avp->av_recv_pspoll(ni, m); 6508 #else 6509 avp->av_recv_pspoll(ni, m); 6510 #endif /* ATH_SW_PSQ */ 6511 } 6512 6513 MODULE_VERSION(if_ath, 1); 6514 MODULE_DEPEND(if_ath, wlan, 1, 1, 1); /* 802.11 media layer */ 6515 #if defined(IEEE80211_ALQ) || defined(AH_DEBUG_ALQ) 6516 MODULE_DEPEND(if_ath, alq, 1, 1, 1); 6517 #endif 6518