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_hw(struct ath_softc *); 169 static void ath_update_mcast(struct ifnet *); 170 static void ath_update_promisc(struct ifnet *); 171 static void ath_updateslot(struct ifnet *); 172 static void ath_bstuck_proc(void *, int); 173 static void ath_reset_proc(void *, int); 174 static int ath_desc_alloc(struct ath_softc *); 175 static void ath_desc_free(struct ath_softc *); 176 static struct ieee80211_node *ath_node_alloc(struct ieee80211vap *, 177 const uint8_t [IEEE80211_ADDR_LEN]); 178 static void ath_node_cleanup(struct ieee80211_node *); 179 static void ath_node_free(struct ieee80211_node *); 180 static void ath_node_getsignal(const struct ieee80211_node *, 181 int8_t *, int8_t *); 182 static void ath_txq_init(struct ath_softc *sc, struct ath_txq *, int); 183 static struct ath_txq *ath_txq_setup(struct ath_softc*, int qtype, int subtype); 184 static int ath_tx_setup(struct ath_softc *, int, int); 185 static void ath_tx_cleanupq(struct ath_softc *, struct ath_txq *); 186 static void ath_tx_cleanup(struct ath_softc *); 187 static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq, 188 int dosched); 189 static void ath_tx_proc_q0(void *, int); 190 static void ath_tx_proc_q0123(void *, int); 191 static void ath_tx_proc(void *, int); 192 static void ath_txq_sched_tasklet(void *, int); 193 static int ath_chan_set(struct ath_softc *, struct ieee80211_channel *); 194 static void ath_chan_change(struct ath_softc *, struct ieee80211_channel *); 195 static void ath_scan_start(struct ieee80211com *); 196 static void ath_scan_end(struct ieee80211com *); 197 static void ath_set_channel(struct ieee80211com *); 198 #ifdef ATH_ENABLE_11N 199 static void ath_update_chw(struct ieee80211com *); 200 #endif /* ATH_ENABLE_11N */ 201 static void ath_calibrate(void *); 202 static int ath_newstate(struct ieee80211vap *, enum ieee80211_state, int); 203 static void ath_setup_stationkey(struct ieee80211_node *); 204 static void ath_newassoc(struct ieee80211_node *, int); 205 static int ath_setregdomain(struct ieee80211com *, 206 struct ieee80211_regdomain *, int, 207 struct ieee80211_channel []); 208 static void ath_getradiocaps(struct ieee80211com *, int, int *, 209 struct ieee80211_channel []); 210 static int ath_getchannels(struct ath_softc *); 211 212 static int ath_rate_setup(struct ath_softc *, u_int mode); 213 static void ath_setcurmode(struct ath_softc *, enum ieee80211_phymode); 214 215 static void ath_announce(struct ath_softc *); 216 217 static void ath_dfs_tasklet(void *, int); 218 static void ath_node_powersave(struct ieee80211_node *, int); 219 static int ath_node_set_tim(struct ieee80211_node *, int); 220 static void ath_node_recv_pspoll(struct ieee80211_node *, struct mbuf *); 221 222 #ifdef IEEE80211_SUPPORT_TDMA 223 #include <dev/ath/if_ath_tdma.h> 224 #endif 225 226 SYSCTL_DECL(_hw_ath); 227 228 /* XXX validate sysctl values */ 229 static int ath_longcalinterval = 30; /* long cals every 30 secs */ 230 SYSCTL_INT(_hw_ath, OID_AUTO, longcal, CTLFLAG_RW, &ath_longcalinterval, 231 0, "long chip calibration interval (secs)"); 232 static int ath_shortcalinterval = 100; /* short cals every 100 ms */ 233 SYSCTL_INT(_hw_ath, OID_AUTO, shortcal, CTLFLAG_RW, &ath_shortcalinterval, 234 0, "short chip calibration interval (msecs)"); 235 static int ath_resetcalinterval = 20*60; /* reset cal state 20 mins */ 236 SYSCTL_INT(_hw_ath, OID_AUTO, resetcal, CTLFLAG_RW, &ath_resetcalinterval, 237 0, "reset chip calibration results (secs)"); 238 static int ath_anicalinterval = 100; /* ANI calibration - 100 msec */ 239 SYSCTL_INT(_hw_ath, OID_AUTO, anical, CTLFLAG_RW, &ath_anicalinterval, 240 0, "ANI calibration (msecs)"); 241 242 int ath_rxbuf = ATH_RXBUF; /* # rx buffers to allocate */ 243 SYSCTL_INT(_hw_ath, OID_AUTO, rxbuf, CTLFLAG_RWTUN, &ath_rxbuf, 244 0, "rx buffers allocated"); 245 int ath_txbuf = ATH_TXBUF; /* # tx buffers to allocate */ 246 SYSCTL_INT(_hw_ath, OID_AUTO, txbuf, CTLFLAG_RWTUN, &ath_txbuf, 247 0, "tx buffers allocated"); 248 int ath_txbuf_mgmt = ATH_MGMT_TXBUF; /* # mgmt tx buffers to allocate */ 249 SYSCTL_INT(_hw_ath, OID_AUTO, txbuf_mgmt, CTLFLAG_RWTUN, &ath_txbuf_mgmt, 250 0, "tx (mgmt) buffers allocated"); 251 252 int ath_bstuck_threshold = 4; /* max missed beacons */ 253 SYSCTL_INT(_hw_ath, OID_AUTO, bstuck, CTLFLAG_RW, &ath_bstuck_threshold, 254 0, "max missed beacon xmits before chip reset"); 255 256 MALLOC_DEFINE(M_ATHDEV, "athdev", "ath driver dma buffers"); 257 258 void 259 ath_legacy_attach_comp_func(struct ath_softc *sc) 260 { 261 262 /* 263 * Special case certain configurations. Note the 264 * CAB queue is handled by these specially so don't 265 * include them when checking the txq setup mask. 266 */ 267 switch (sc->sc_txqsetup &~ (1<<sc->sc_cabq->axq_qnum)) { 268 case 0x01: 269 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0, sc); 270 break; 271 case 0x0f: 272 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0123, sc); 273 break; 274 default: 275 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc, sc); 276 break; 277 } 278 } 279 280 /* 281 * Set the target power mode. 282 * 283 * If this is called during a point in time where 284 * the hardware is being programmed elsewhere, it will 285 * simply store it away and update it when all current 286 * uses of the hardware are completed. 287 */ 288 void 289 _ath_power_setpower(struct ath_softc *sc, int power_state, const char *file, int line) 290 { 291 ATH_LOCK_ASSERT(sc); 292 293 sc->sc_target_powerstate = power_state; 294 295 DPRINTF(sc, ATH_DEBUG_PWRSAVE, "%s: (%s:%d) state=%d, refcnt=%d\n", 296 __func__, 297 file, 298 line, 299 power_state, 300 sc->sc_powersave_refcnt); 301 302 if (sc->sc_powersave_refcnt == 0 && 303 power_state != sc->sc_cur_powerstate) { 304 sc->sc_cur_powerstate = power_state; 305 ath_hal_setpower(sc->sc_ah, power_state); 306 307 /* 308 * If the NIC is force-awake, then set the 309 * self-gen frame state appropriately. 310 * 311 * If the nic is in network sleep or full-sleep, 312 * we let the above call leave the self-gen 313 * state as "sleep". 314 */ 315 if (sc->sc_cur_powerstate == HAL_PM_AWAKE && 316 sc->sc_target_selfgen_state != HAL_PM_AWAKE) { 317 ath_hal_setselfgenpower(sc->sc_ah, 318 sc->sc_target_selfgen_state); 319 } 320 } 321 } 322 323 /* 324 * Set the current self-generated frames state. 325 * 326 * This is separate from the target power mode. The chip may be 327 * awake but the desired state is "sleep", so frames sent to the 328 * destination has PWRMGT=1 in the 802.11 header. The NIC also 329 * needs to know to set PWRMGT=1 in self-generated frames. 330 */ 331 void 332 _ath_power_set_selfgen(struct ath_softc *sc, int power_state, const char *file, int line) 333 { 334 335 ATH_LOCK_ASSERT(sc); 336 337 DPRINTF(sc, ATH_DEBUG_PWRSAVE, "%s: (%s:%d) state=%d, refcnt=%d\n", 338 __func__, 339 file, 340 line, 341 power_state, 342 sc->sc_target_selfgen_state); 343 344 sc->sc_target_selfgen_state = power_state; 345 346 /* 347 * If the NIC is force-awake, then set the power state. 348 * Network-state and full-sleep will already transition it to 349 * mark self-gen frames as sleeping - and we can't 350 * guarantee the NIC is awake to program the self-gen frame 351 * setting anyway. 352 */ 353 if (sc->sc_cur_powerstate == HAL_PM_AWAKE) { 354 ath_hal_setselfgenpower(sc->sc_ah, power_state); 355 } 356 } 357 358 /* 359 * Set the hardware power mode and take a reference. 360 * 361 * This doesn't update the target power mode in the driver; 362 * it just updates the hardware power state. 363 * 364 * XXX it should only ever force the hardware awake; it should 365 * never be called to set it asleep. 366 */ 367 void 368 _ath_power_set_power_state(struct ath_softc *sc, int power_state, const char *file, int line) 369 { 370 ATH_LOCK_ASSERT(sc); 371 372 DPRINTF(sc, ATH_DEBUG_PWRSAVE, "%s: (%s:%d) state=%d, refcnt=%d\n", 373 __func__, 374 file, 375 line, 376 power_state, 377 sc->sc_powersave_refcnt); 378 379 sc->sc_powersave_refcnt++; 380 381 if (power_state != sc->sc_cur_powerstate) { 382 ath_hal_setpower(sc->sc_ah, power_state); 383 sc->sc_cur_powerstate = power_state; 384 385 /* 386 * Adjust the self-gen powerstate if appropriate. 387 */ 388 if (sc->sc_cur_powerstate == HAL_PM_AWAKE && 389 sc->sc_target_selfgen_state != HAL_PM_AWAKE) { 390 ath_hal_setselfgenpower(sc->sc_ah, 391 sc->sc_target_selfgen_state); 392 } 393 394 } 395 } 396 397 /* 398 * Restore the power save mode to what it once was. 399 * 400 * This will decrement the reference counter and once it hits 401 * zero, it'll restore the powersave state. 402 */ 403 void 404 _ath_power_restore_power_state(struct ath_softc *sc, const char *file, int line) 405 { 406 407 ATH_LOCK_ASSERT(sc); 408 409 DPRINTF(sc, ATH_DEBUG_PWRSAVE, "%s: (%s:%d) refcnt=%d, target state=%d\n", 410 __func__, 411 file, 412 line, 413 sc->sc_powersave_refcnt, 414 sc->sc_target_powerstate); 415 416 if (sc->sc_powersave_refcnt == 0) 417 device_printf(sc->sc_dev, "%s: refcnt=0?\n", __func__); 418 else 419 sc->sc_powersave_refcnt--; 420 421 if (sc->sc_powersave_refcnt == 0 && 422 sc->sc_target_powerstate != sc->sc_cur_powerstate) { 423 sc->sc_cur_powerstate = sc->sc_target_powerstate; 424 ath_hal_setpower(sc->sc_ah, sc->sc_target_powerstate); 425 } 426 427 /* 428 * Adjust the self-gen powerstate if appropriate. 429 */ 430 if (sc->sc_cur_powerstate == HAL_PM_AWAKE && 431 sc->sc_target_selfgen_state != HAL_PM_AWAKE) { 432 ath_hal_setselfgenpower(sc->sc_ah, 433 sc->sc_target_selfgen_state); 434 } 435 436 } 437 438 /* 439 * Configure the initial HAL configuration values based on bus 440 * specific parameters. 441 * 442 * Some PCI IDs and other information may need tweaking. 443 * 444 * XXX TODO: ath9k and the Atheros HAL only program comm2g_switch_enable 445 * if BT antenna diversity isn't enabled. 446 * 447 * So, let's also figure out how to enable BT diversity for AR9485. 448 */ 449 static void 450 ath_setup_hal_config(struct ath_softc *sc, HAL_OPS_CONFIG *ah_config) 451 { 452 /* XXX TODO: only for PCI devices? */ 453 454 if (sc->sc_pci_devinfo & (ATH_PCI_CUS198 | ATH_PCI_CUS230)) { 455 ah_config->ath_hal_ext_lna_ctl_gpio = 0x200; /* bit 9 */ 456 ah_config->ath_hal_ext_atten_margin_cfg = AH_TRUE; 457 ah_config->ath_hal_min_gainidx = AH_TRUE; 458 ah_config->ath_hal_ant_ctrl_comm2g_switch_enable = 0x000bbb88; 459 /* XXX low_rssi_thresh */ 460 /* XXX fast_div_bias */ 461 device_printf(sc->sc_dev, "configuring for %s\n", 462 (sc->sc_pci_devinfo & ATH_PCI_CUS198) ? 463 "CUS198" : "CUS230"); 464 } 465 466 if (sc->sc_pci_devinfo & ATH_PCI_CUS217) 467 device_printf(sc->sc_dev, "CUS217 card detected\n"); 468 469 if (sc->sc_pci_devinfo & ATH_PCI_CUS252) 470 device_printf(sc->sc_dev, "CUS252 card detected\n"); 471 472 if (sc->sc_pci_devinfo & ATH_PCI_AR9565_1ANT) 473 device_printf(sc->sc_dev, "WB335 1-ANT card detected\n"); 474 475 if (sc->sc_pci_devinfo & ATH_PCI_AR9565_2ANT) 476 device_printf(sc->sc_dev, "WB335 2-ANT card detected\n"); 477 478 if (sc->sc_pci_devinfo & ATH_PCI_KILLER) 479 device_printf(sc->sc_dev, "Killer Wireless card detected\n"); 480 481 #if 0 482 /* 483 * Some WB335 cards do not support antenna diversity. Since 484 * we use a hardcoded value for AR9565 instead of using the 485 * EEPROM/OTP data, remove the combining feature from 486 * the HW capabilities bitmap. 487 */ 488 if (sc->sc_pci_devinfo & (ATH9K_PCI_AR9565_1ANT | ATH9K_PCI_AR9565_2ANT)) { 489 if (!(sc->sc_pci_devinfo & ATH9K_PCI_BT_ANT_DIV)) 490 pCap->hw_caps &= ~ATH9K_HW_CAP_ANT_DIV_COMB; 491 } 492 493 if (sc->sc_pci_devinfo & ATH9K_PCI_BT_ANT_DIV) { 494 pCap->hw_caps |= ATH9K_HW_CAP_BT_ANT_DIV; 495 device_printf(sc->sc_dev, "Set BT/WLAN RX diversity capability\n"); 496 } 497 #endif 498 499 if (sc->sc_pci_devinfo & ATH_PCI_D3_L1_WAR) { 500 ah_config->ath_hal_pcie_waen = 0x0040473b; 501 device_printf(sc->sc_dev, "Enable WAR for ASPM D3/L1\n"); 502 } 503 504 #if 0 505 if (sc->sc_pci_devinfo & ATH9K_PCI_NO_PLL_PWRSAVE) { 506 ah->config.no_pll_pwrsave = true; 507 device_printf(sc->sc_dev, "Disable PLL PowerSave\n"); 508 } 509 #endif 510 511 } 512 513 /* 514 * Attempt to fetch the MAC address from the kernel environment. 515 * 516 * Returns 0, macaddr in macaddr if successful; -1 otherwise. 517 */ 518 static int 519 ath_fetch_mac_kenv(struct ath_softc *sc, uint8_t *macaddr) 520 { 521 char devid_str[32]; 522 int local_mac = 0; 523 char *local_macstr; 524 525 /* 526 * Fetch from the kenv rather than using hints. 527 * 528 * Hints would be nice but the transition to dynamic 529 * hints/kenv doesn't happen early enough for this 530 * to work reliably (eg on anything embedded.) 531 */ 532 snprintf(devid_str, 32, "hint.%s.%d.macaddr", 533 device_get_name(sc->sc_dev), 534 device_get_unit(sc->sc_dev)); 535 536 if ((local_macstr = kern_getenv(devid_str)) != NULL) { 537 uint32_t tmpmac[ETHER_ADDR_LEN]; 538 int count; 539 int i; 540 541 /* Have a MAC address; should use it */ 542 device_printf(sc->sc_dev, 543 "Overriding MAC address from environment: '%s'\n", 544 local_macstr); 545 546 /* Extract out the MAC address */ 547 count = sscanf(local_macstr, "%x%*c%x%*c%x%*c%x%*c%x%*c%x", 548 &tmpmac[0], &tmpmac[1], 549 &tmpmac[2], &tmpmac[3], 550 &tmpmac[4], &tmpmac[5]); 551 if (count == 6) { 552 /* Valid! */ 553 local_mac = 1; 554 for (i = 0; i < ETHER_ADDR_LEN; i++) 555 macaddr[i] = tmpmac[i]; 556 } 557 /* Done! */ 558 freeenv(local_macstr); 559 local_macstr = NULL; 560 } 561 562 if (local_mac) 563 return (0); 564 return (-1); 565 } 566 567 #define HAL_MODE_HT20 (HAL_MODE_11NG_HT20 | HAL_MODE_11NA_HT20) 568 #define HAL_MODE_HT40 \ 569 (HAL_MODE_11NG_HT40PLUS | HAL_MODE_11NG_HT40MINUS | \ 570 HAL_MODE_11NA_HT40PLUS | HAL_MODE_11NA_HT40MINUS) 571 int 572 ath_attach(u_int16_t devid, struct ath_softc *sc) 573 { 574 struct ifnet *ifp; 575 struct ieee80211com *ic; 576 struct ath_hal *ah = NULL; 577 HAL_STATUS status; 578 int error = 0, i; 579 u_int wmodes; 580 uint8_t macaddr[IEEE80211_ADDR_LEN]; 581 int rx_chainmask, tx_chainmask; 582 HAL_OPS_CONFIG ah_config; 583 584 DPRINTF(sc, ATH_DEBUG_ANY, "%s: devid 0x%x\n", __func__, devid); 585 586 CURVNET_SET(vnet0); 587 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211); 588 if (ifp == NULL) { 589 device_printf(sc->sc_dev, "can not if_alloc()\n"); 590 error = ENOSPC; 591 CURVNET_RESTORE(); 592 goto bad; 593 } 594 ic = ifp->if_l2com; 595 596 /* set these up early for if_printf use */ 597 if_initname(ifp, device_get_name(sc->sc_dev), 598 device_get_unit(sc->sc_dev)); 599 CURVNET_RESTORE(); 600 601 /* 602 * Configure the initial configuration data. 603 * 604 * This is stuff that may be needed early during attach 605 * rather than done via configuration calls later. 606 */ 607 bzero(&ah_config, sizeof(ah_config)); 608 ath_setup_hal_config(sc, &ah_config); 609 610 ah = ath_hal_attach(devid, sc, sc->sc_st, sc->sc_sh, 611 sc->sc_eepromdata, &ah_config, &status); 612 if (ah == NULL) { 613 if_printf(ifp, "unable to attach hardware; HAL status %u\n", 614 status); 615 error = ENXIO; 616 goto bad; 617 } 618 sc->sc_ah = ah; 619 sc->sc_invalid = 0; /* ready to go, enable interrupt handling */ 620 #ifdef ATH_DEBUG 621 sc->sc_debug = ath_debug; 622 #endif 623 624 /* 625 * Setup the DMA/EDMA functions based on the current 626 * hardware support. 627 * 628 * This is required before the descriptors are allocated. 629 */ 630 if (ath_hal_hasedma(sc->sc_ah)) { 631 sc->sc_isedma = 1; 632 ath_recv_setup_edma(sc); 633 ath_xmit_setup_edma(sc); 634 } else { 635 ath_recv_setup_legacy(sc); 636 ath_xmit_setup_legacy(sc); 637 } 638 639 if (ath_hal_hasmybeacon(sc->sc_ah)) { 640 sc->sc_do_mybeacon = 1; 641 } 642 643 /* 644 * Check if the MAC has multi-rate retry support. 645 * We do this by trying to setup a fake extended 646 * descriptor. MAC's that don't have support will 647 * return false w/o doing anything. MAC's that do 648 * support it will return true w/o doing anything. 649 */ 650 sc->sc_mrretry = ath_hal_setupxtxdesc(ah, NULL, 0,0, 0,0, 0,0); 651 652 /* 653 * Check if the device has hardware counters for PHY 654 * errors. If so we need to enable the MIB interrupt 655 * so we can act on stat triggers. 656 */ 657 if (ath_hal_hwphycounters(ah)) 658 sc->sc_needmib = 1; 659 660 /* 661 * Get the hardware key cache size. 662 */ 663 sc->sc_keymax = ath_hal_keycachesize(ah); 664 if (sc->sc_keymax > ATH_KEYMAX) { 665 if_printf(ifp, "Warning, using only %u of %u key cache slots\n", 666 ATH_KEYMAX, sc->sc_keymax); 667 sc->sc_keymax = ATH_KEYMAX; 668 } 669 /* 670 * Reset the key cache since some parts do not 671 * reset the contents on initial power up. 672 */ 673 for (i = 0; i < sc->sc_keymax; i++) 674 ath_hal_keyreset(ah, i); 675 676 /* 677 * Collect the default channel list. 678 */ 679 error = ath_getchannels(sc); 680 if (error != 0) 681 goto bad; 682 683 /* 684 * Setup rate tables for all potential media types. 685 */ 686 ath_rate_setup(sc, IEEE80211_MODE_11A); 687 ath_rate_setup(sc, IEEE80211_MODE_11B); 688 ath_rate_setup(sc, IEEE80211_MODE_11G); 689 ath_rate_setup(sc, IEEE80211_MODE_TURBO_A); 690 ath_rate_setup(sc, IEEE80211_MODE_TURBO_G); 691 ath_rate_setup(sc, IEEE80211_MODE_STURBO_A); 692 ath_rate_setup(sc, IEEE80211_MODE_11NA); 693 ath_rate_setup(sc, IEEE80211_MODE_11NG); 694 ath_rate_setup(sc, IEEE80211_MODE_HALF); 695 ath_rate_setup(sc, IEEE80211_MODE_QUARTER); 696 697 /* NB: setup here so ath_rate_update is happy */ 698 ath_setcurmode(sc, IEEE80211_MODE_11A); 699 700 /* 701 * Allocate TX descriptors and populate the lists. 702 */ 703 error = ath_desc_alloc(sc); 704 if (error != 0) { 705 if_printf(ifp, "failed to allocate TX descriptors: %d\n", 706 error); 707 goto bad; 708 } 709 error = ath_txdma_setup(sc); 710 if (error != 0) { 711 if_printf(ifp, "failed to allocate TX descriptors: %d\n", 712 error); 713 goto bad; 714 } 715 716 /* 717 * Allocate RX descriptors and populate the lists. 718 */ 719 error = ath_rxdma_setup(sc); 720 if (error != 0) { 721 if_printf(ifp, "failed to allocate RX descriptors: %d\n", 722 error); 723 goto bad; 724 } 725 726 callout_init_mtx(&sc->sc_cal_ch, &sc->sc_mtx, 0); 727 callout_init_mtx(&sc->sc_wd_ch, &sc->sc_mtx, 0); 728 729 ATH_TXBUF_LOCK_INIT(sc); 730 731 sc->sc_tq = taskqueue_create("ath_taskq", M_NOWAIT, 732 taskqueue_thread_enqueue, &sc->sc_tq); 733 taskqueue_start_threads(&sc->sc_tq, 1, PI_NET, 734 "%s taskq", ifp->if_xname); 735 736 TASK_INIT(&sc->sc_rxtask, 0, sc->sc_rx.recv_tasklet, sc); 737 TASK_INIT(&sc->sc_bmisstask, 0, ath_bmiss_proc, sc); 738 TASK_INIT(&sc->sc_bstucktask,0, ath_bstuck_proc, sc); 739 TASK_INIT(&sc->sc_resettask,0, ath_reset_proc, sc); 740 TASK_INIT(&sc->sc_txqtask, 0, ath_txq_sched_tasklet, sc); 741 TASK_INIT(&sc->sc_fataltask, 0, ath_fatal_proc, sc); 742 743 /* 744 * Allocate hardware transmit queues: one queue for 745 * beacon frames and one data queue for each QoS 746 * priority. Note that the hal handles resetting 747 * these queues at the needed time. 748 * 749 * XXX PS-Poll 750 */ 751 sc->sc_bhalq = ath_beaconq_setup(sc); 752 if (sc->sc_bhalq == (u_int) -1) { 753 if_printf(ifp, "unable to setup a beacon xmit queue!\n"); 754 error = EIO; 755 goto bad2; 756 } 757 sc->sc_cabq = ath_txq_setup(sc, HAL_TX_QUEUE_CAB, 0); 758 if (sc->sc_cabq == NULL) { 759 if_printf(ifp, "unable to setup CAB xmit queue!\n"); 760 error = EIO; 761 goto bad2; 762 } 763 /* NB: insure BK queue is the lowest priority h/w queue */ 764 if (!ath_tx_setup(sc, WME_AC_BK, HAL_WME_AC_BK)) { 765 if_printf(ifp, "unable to setup xmit queue for %s traffic!\n", 766 ieee80211_wme_acnames[WME_AC_BK]); 767 error = EIO; 768 goto bad2; 769 } 770 if (!ath_tx_setup(sc, WME_AC_BE, HAL_WME_AC_BE) || 771 !ath_tx_setup(sc, WME_AC_VI, HAL_WME_AC_VI) || 772 !ath_tx_setup(sc, WME_AC_VO, HAL_WME_AC_VO)) { 773 /* 774 * Not enough hardware tx queues to properly do WME; 775 * just punt and assign them all to the same h/w queue. 776 * We could do a better job of this if, for example, 777 * we allocate queues when we switch from station to 778 * AP mode. 779 */ 780 if (sc->sc_ac2q[WME_AC_VI] != NULL) 781 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_VI]); 782 if (sc->sc_ac2q[WME_AC_BE] != NULL) 783 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_BE]); 784 sc->sc_ac2q[WME_AC_BE] = sc->sc_ac2q[WME_AC_BK]; 785 sc->sc_ac2q[WME_AC_VI] = sc->sc_ac2q[WME_AC_BK]; 786 sc->sc_ac2q[WME_AC_VO] = sc->sc_ac2q[WME_AC_BK]; 787 } 788 789 /* 790 * Attach the TX completion function. 791 * 792 * The non-EDMA chips may have some special case optimisations; 793 * this method gives everyone a chance to attach cleanly. 794 */ 795 sc->sc_tx.xmit_attach_comp_func(sc); 796 797 /* 798 * Setup rate control. Some rate control modules 799 * call back to change the anntena state so expose 800 * the necessary entry points. 801 * XXX maybe belongs in struct ath_ratectrl? 802 */ 803 sc->sc_setdefantenna = ath_setdefantenna; 804 sc->sc_rc = ath_rate_attach(sc); 805 if (sc->sc_rc == NULL) { 806 error = EIO; 807 goto bad2; 808 } 809 810 /* Attach DFS module */ 811 if (! ath_dfs_attach(sc)) { 812 device_printf(sc->sc_dev, 813 "%s: unable to attach DFS\n", __func__); 814 error = EIO; 815 goto bad2; 816 } 817 818 /* Attach spectral module */ 819 if (ath_spectral_attach(sc) < 0) { 820 device_printf(sc->sc_dev, 821 "%s: unable to attach spectral\n", __func__); 822 error = EIO; 823 goto bad2; 824 } 825 826 /* Attach bluetooth coexistence module */ 827 if (ath_btcoex_attach(sc) < 0) { 828 device_printf(sc->sc_dev, 829 "%s: unable to attach bluetooth coexistence\n", __func__); 830 error = EIO; 831 goto bad2; 832 } 833 834 /* Attach LNA diversity module */ 835 if (ath_lna_div_attach(sc) < 0) { 836 device_printf(sc->sc_dev, 837 "%s: unable to attach LNA diversity\n", __func__); 838 error = EIO; 839 goto bad2; 840 } 841 842 /* Start DFS processing tasklet */ 843 TASK_INIT(&sc->sc_dfstask, 0, ath_dfs_tasklet, sc); 844 845 /* Configure LED state */ 846 sc->sc_blinking = 0; 847 sc->sc_ledstate = 1; 848 sc->sc_ledon = 0; /* low true */ 849 sc->sc_ledidle = (2700*hz)/1000; /* 2.7sec */ 850 callout_init(&sc->sc_ledtimer, 1); 851 852 /* 853 * Don't setup hardware-based blinking. 854 * 855 * Although some NICs may have this configured in the 856 * default reset register values, the user may wish 857 * to alter which pins have which function. 858 * 859 * The reference driver attaches the MAC network LED to GPIO1 and 860 * the MAC power LED to GPIO2. However, the DWA-552 cardbus 861 * NIC has these reversed. 862 */ 863 sc->sc_hardled = (1 == 0); 864 sc->sc_led_net_pin = -1; 865 sc->sc_led_pwr_pin = -1; 866 /* 867 * Auto-enable soft led processing for IBM cards and for 868 * 5211 minipci cards. Users can also manually enable/disable 869 * support with a sysctl. 870 */ 871 sc->sc_softled = (devid == AR5212_DEVID_IBM || devid == AR5211_DEVID); 872 ath_led_config(sc); 873 ath_hal_setledstate(ah, HAL_LED_INIT); 874 875 ifp->if_softc = sc; 876 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 877 ifp->if_transmit = ath_transmit; 878 ifp->if_qflush = ath_qflush; 879 ifp->if_ioctl = ath_ioctl; 880 ifp->if_init = ath_init; 881 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 882 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 883 IFQ_SET_READY(&ifp->if_snd); 884 885 ic->ic_ifp = ifp; 886 /* XXX not right but it's not used anywhere important */ 887 ic->ic_phytype = IEEE80211_T_OFDM; 888 ic->ic_opmode = IEEE80211_M_STA; 889 ic->ic_caps = 890 IEEE80211_C_STA /* station mode */ 891 | IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ 892 | IEEE80211_C_HOSTAP /* hostap mode */ 893 | IEEE80211_C_MONITOR /* monitor mode */ 894 | IEEE80211_C_AHDEMO /* adhoc demo mode */ 895 | IEEE80211_C_WDS /* 4-address traffic works */ 896 | IEEE80211_C_MBSS /* mesh point link mode */ 897 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 898 | IEEE80211_C_SHSLOT /* short slot time supported */ 899 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ 900 #ifndef ATH_ENABLE_11N 901 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 902 #endif 903 | IEEE80211_C_TXFRAG /* handle tx frags */ 904 #ifdef ATH_ENABLE_DFS 905 | IEEE80211_C_DFS /* Enable radar detection */ 906 #endif 907 | IEEE80211_C_PMGT /* Station side power mgmt */ 908 | IEEE80211_C_SWSLEEP 909 ; 910 /* 911 * Query the hal to figure out h/w crypto support. 912 */ 913 if (ath_hal_ciphersupported(ah, HAL_CIPHER_WEP)) 914 ic->ic_cryptocaps |= IEEE80211_CRYPTO_WEP; 915 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_OCB)) 916 ic->ic_cryptocaps |= IEEE80211_CRYPTO_AES_OCB; 917 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_CCM)) 918 ic->ic_cryptocaps |= IEEE80211_CRYPTO_AES_CCM; 919 if (ath_hal_ciphersupported(ah, HAL_CIPHER_CKIP)) 920 ic->ic_cryptocaps |= IEEE80211_CRYPTO_CKIP; 921 if (ath_hal_ciphersupported(ah, HAL_CIPHER_TKIP)) { 922 ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIP; 923 /* 924 * Check if h/w does the MIC and/or whether the 925 * separate key cache entries are required to 926 * handle both tx+rx MIC keys. 927 */ 928 if (ath_hal_ciphersupported(ah, HAL_CIPHER_MIC)) 929 ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIPMIC; 930 /* 931 * If the h/w supports storing tx+rx MIC keys 932 * in one cache slot automatically enable use. 933 */ 934 if (ath_hal_hastkipsplit(ah) || 935 !ath_hal_settkipsplit(ah, AH_FALSE)) 936 sc->sc_splitmic = 1; 937 /* 938 * If the h/w can do TKIP MIC together with WME then 939 * we use it; otherwise we force the MIC to be done 940 * in software by the net80211 layer. 941 */ 942 if (ath_hal_haswmetkipmic(ah)) 943 sc->sc_wmetkipmic = 1; 944 } 945 sc->sc_hasclrkey = ath_hal_ciphersupported(ah, HAL_CIPHER_CLR); 946 /* 947 * Check for multicast key search support. 948 */ 949 if (ath_hal_hasmcastkeysearch(sc->sc_ah) && 950 !ath_hal_getmcastkeysearch(sc->sc_ah)) { 951 ath_hal_setmcastkeysearch(sc->sc_ah, 1); 952 } 953 sc->sc_mcastkey = ath_hal_getmcastkeysearch(ah); 954 /* 955 * Mark key cache slots associated with global keys 956 * as in use. If we knew TKIP was not to be used we 957 * could leave the +32, +64, and +32+64 slots free. 958 */ 959 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 960 setbit(sc->sc_keymap, i); 961 setbit(sc->sc_keymap, i+64); 962 if (sc->sc_splitmic) { 963 setbit(sc->sc_keymap, i+32); 964 setbit(sc->sc_keymap, i+32+64); 965 } 966 } 967 /* 968 * TPC support can be done either with a global cap or 969 * per-packet support. The latter is not available on 970 * all parts. We're a bit pedantic here as all parts 971 * support a global cap. 972 */ 973 if (ath_hal_hastpc(ah) || ath_hal_hastxpowlimit(ah)) 974 ic->ic_caps |= IEEE80211_C_TXPMGT; 975 976 /* 977 * Mark WME capability only if we have sufficient 978 * hardware queues to do proper priority scheduling. 979 */ 980 if (sc->sc_ac2q[WME_AC_BE] != sc->sc_ac2q[WME_AC_BK]) 981 ic->ic_caps |= IEEE80211_C_WME; 982 /* 983 * Check for misc other capabilities. 984 */ 985 if (ath_hal_hasbursting(ah)) 986 ic->ic_caps |= IEEE80211_C_BURST; 987 sc->sc_hasbmask = ath_hal_hasbssidmask(ah); 988 sc->sc_hasbmatch = ath_hal_hasbssidmatch(ah); 989 sc->sc_hastsfadd = ath_hal_hastsfadjust(ah); 990 sc->sc_rxslink = ath_hal_self_linked_final_rxdesc(ah); 991 sc->sc_rxtsf32 = ath_hal_has_long_rxdesc_tsf(ah); 992 sc->sc_hasenforcetxop = ath_hal_hasenforcetxop(ah); 993 sc->sc_rx_lnamixer = ath_hal_hasrxlnamixer(ah); 994 sc->sc_hasdivcomb = ath_hal_hasdivantcomb(ah); 995 996 if (ath_hal_hasfastframes(ah)) 997 ic->ic_caps |= IEEE80211_C_FF; 998 wmodes = ath_hal_getwirelessmodes(ah); 999 if (wmodes & (HAL_MODE_108G|HAL_MODE_TURBO)) 1000 ic->ic_caps |= IEEE80211_C_TURBOP; 1001 #ifdef IEEE80211_SUPPORT_TDMA 1002 if (ath_hal_macversion(ah) > 0x78) { 1003 ic->ic_caps |= IEEE80211_C_TDMA; /* capable of TDMA */ 1004 ic->ic_tdma_update = ath_tdma_update; 1005 } 1006 #endif 1007 1008 /* 1009 * TODO: enforce that at least this many frames are available 1010 * in the txbuf list before allowing data frames (raw or 1011 * otherwise) to be transmitted. 1012 */ 1013 sc->sc_txq_data_minfree = 10; 1014 /* 1015 * Leave this as default to maintain legacy behaviour. 1016 * Shortening the cabq/mcastq may end up causing some 1017 * undesirable behaviour. 1018 */ 1019 sc->sc_txq_mcastq_maxdepth = ath_txbuf; 1020 1021 /* 1022 * How deep can the node software TX queue get whilst it's asleep. 1023 */ 1024 sc->sc_txq_node_psq_maxdepth = 16; 1025 1026 /* 1027 * Default the maximum queue depth for a given node 1028 * to 1/4'th the TX buffers, or 64, whichever 1029 * is larger. 1030 */ 1031 sc->sc_txq_node_maxdepth = MAX(64, ath_txbuf / 4); 1032 1033 /* Enable CABQ by default */ 1034 sc->sc_cabq_enable = 1; 1035 1036 /* 1037 * Allow the TX and RX chainmasks to be overridden by 1038 * environment variables and/or device.hints. 1039 * 1040 * This must be done early - before the hardware is 1041 * calibrated or before the 802.11n stream calculation 1042 * is done. 1043 */ 1044 if (resource_int_value(device_get_name(sc->sc_dev), 1045 device_get_unit(sc->sc_dev), "rx_chainmask", 1046 &rx_chainmask) == 0) { 1047 device_printf(sc->sc_dev, "Setting RX chainmask to 0x%x\n", 1048 rx_chainmask); 1049 (void) ath_hal_setrxchainmask(sc->sc_ah, rx_chainmask); 1050 } 1051 if (resource_int_value(device_get_name(sc->sc_dev), 1052 device_get_unit(sc->sc_dev), "tx_chainmask", 1053 &tx_chainmask) == 0) { 1054 device_printf(sc->sc_dev, "Setting TX chainmask to 0x%x\n", 1055 tx_chainmask); 1056 (void) ath_hal_settxchainmask(sc->sc_ah, tx_chainmask); 1057 } 1058 1059 /* 1060 * Query the TX/RX chainmask configuration. 1061 * 1062 * This is only relevant for 11n devices. 1063 */ 1064 ath_hal_getrxchainmask(ah, &sc->sc_rxchainmask); 1065 ath_hal_gettxchainmask(ah, &sc->sc_txchainmask); 1066 1067 /* 1068 * Disable MRR with protected frames by default. 1069 * Only 802.11n series NICs can handle this. 1070 */ 1071 sc->sc_mrrprot = 0; /* XXX should be a capability */ 1072 1073 /* 1074 * Query the enterprise mode information the HAL. 1075 */ 1076 if (ath_hal_getcapability(ah, HAL_CAP_ENTERPRISE_MODE, 0, 1077 &sc->sc_ent_cfg) == HAL_OK) 1078 sc->sc_use_ent = 1; 1079 1080 #ifdef ATH_ENABLE_11N 1081 /* 1082 * Query HT capabilities 1083 */ 1084 if (ath_hal_getcapability(ah, HAL_CAP_HT, 0, NULL) == HAL_OK && 1085 (wmodes & (HAL_MODE_HT20 | HAL_MODE_HT40))) { 1086 uint32_t rxs, txs; 1087 1088 device_printf(sc->sc_dev, "[HT] enabling HT modes\n"); 1089 1090 sc->sc_mrrprot = 1; /* XXX should be a capability */ 1091 1092 ic->ic_htcaps = IEEE80211_HTC_HT /* HT operation */ 1093 | IEEE80211_HTC_AMPDU /* A-MPDU tx/rx */ 1094 | IEEE80211_HTC_AMSDU /* A-MSDU tx/rx */ 1095 | IEEE80211_HTCAP_MAXAMSDU_3839 1096 /* max A-MSDU length */ 1097 | IEEE80211_HTCAP_SMPS_OFF; /* SM power save off */ 1098 ; 1099 1100 /* 1101 * Enable short-GI for HT20 only if the hardware 1102 * advertises support. 1103 * Notably, anything earlier than the AR9287 doesn't. 1104 */ 1105 if ((ath_hal_getcapability(ah, 1106 HAL_CAP_HT20_SGI, 0, NULL) == HAL_OK) && 1107 (wmodes & HAL_MODE_HT20)) { 1108 device_printf(sc->sc_dev, 1109 "[HT] enabling short-GI in 20MHz mode\n"); 1110 ic->ic_htcaps |= IEEE80211_HTCAP_SHORTGI20; 1111 } 1112 1113 if (wmodes & HAL_MODE_HT40) 1114 ic->ic_htcaps |= IEEE80211_HTCAP_CHWIDTH40 1115 | IEEE80211_HTCAP_SHORTGI40; 1116 1117 /* 1118 * TX/RX streams need to be taken into account when 1119 * negotiating which MCS rates it'll receive and 1120 * what MCS rates are available for TX. 1121 */ 1122 (void) ath_hal_getcapability(ah, HAL_CAP_STREAMS, 0, &txs); 1123 (void) ath_hal_getcapability(ah, HAL_CAP_STREAMS, 1, &rxs); 1124 ic->ic_txstream = txs; 1125 ic->ic_rxstream = rxs; 1126 1127 /* 1128 * Setup TX and RX STBC based on what the HAL allows and 1129 * the currently configured chainmask set. 1130 * Ie - don't enable STBC TX if only one chain is enabled. 1131 * STBC RX is fine on a single RX chain; it just won't 1132 * provide any real benefit. 1133 */ 1134 if (ath_hal_getcapability(ah, HAL_CAP_RX_STBC, 0, 1135 NULL) == HAL_OK) { 1136 sc->sc_rx_stbc = 1; 1137 device_printf(sc->sc_dev, 1138 "[HT] 1 stream STBC receive enabled\n"); 1139 ic->ic_htcaps |= IEEE80211_HTCAP_RXSTBC_1STREAM; 1140 } 1141 if (txs > 1 && ath_hal_getcapability(ah, HAL_CAP_TX_STBC, 0, 1142 NULL) == HAL_OK) { 1143 sc->sc_tx_stbc = 1; 1144 device_printf(sc->sc_dev, 1145 "[HT] 1 stream STBC transmit enabled\n"); 1146 ic->ic_htcaps |= IEEE80211_HTCAP_TXSTBC; 1147 } 1148 1149 (void) ath_hal_getcapability(ah, HAL_CAP_RTS_AGGR_LIMIT, 1, 1150 &sc->sc_rts_aggr_limit); 1151 if (sc->sc_rts_aggr_limit != (64 * 1024)) 1152 device_printf(sc->sc_dev, 1153 "[HT] RTS aggregates limited to %d KiB\n", 1154 sc->sc_rts_aggr_limit / 1024); 1155 1156 device_printf(sc->sc_dev, 1157 "[HT] %d RX streams; %d TX streams\n", rxs, txs); 1158 } 1159 #endif 1160 1161 /* 1162 * Initial aggregation settings. 1163 */ 1164 sc->sc_hwq_limit_aggr = ATH_AGGR_MIN_QDEPTH; 1165 sc->sc_hwq_limit_nonaggr = ATH_NONAGGR_MIN_QDEPTH; 1166 sc->sc_tid_hwq_lo = ATH_AGGR_SCHED_LOW; 1167 sc->sc_tid_hwq_hi = ATH_AGGR_SCHED_HIGH; 1168 sc->sc_aggr_limit = ATH_AGGR_MAXSIZE; 1169 sc->sc_delim_min_pad = 0; 1170 1171 /* 1172 * Check if the hardware requires PCI register serialisation. 1173 * Some of the Owl based MACs require this. 1174 */ 1175 if (mp_ncpus > 1 && 1176 ath_hal_getcapability(ah, HAL_CAP_SERIALISE_WAR, 1177 0, NULL) == HAL_OK) { 1178 sc->sc_ah->ah_config.ah_serialise_reg_war = 1; 1179 device_printf(sc->sc_dev, 1180 "Enabling register serialisation\n"); 1181 } 1182 1183 /* 1184 * Initialise the deferred completed RX buffer list. 1185 */ 1186 TAILQ_INIT(&sc->sc_rx_rxlist[HAL_RX_QUEUE_HP]); 1187 TAILQ_INIT(&sc->sc_rx_rxlist[HAL_RX_QUEUE_LP]); 1188 1189 /* 1190 * Indicate we need the 802.11 header padded to a 1191 * 32-bit boundary for 4-address and QoS frames. 1192 */ 1193 ic->ic_flags |= IEEE80211_F_DATAPAD; 1194 1195 /* 1196 * Query the hal about antenna support. 1197 */ 1198 sc->sc_defant = ath_hal_getdefantenna(ah); 1199 1200 /* 1201 * Not all chips have the VEOL support we want to 1202 * use with IBSS beacons; check here for it. 1203 */ 1204 sc->sc_hasveol = ath_hal_hasveol(ah); 1205 1206 /* get mac address from kenv first, then hardware */ 1207 if (ath_fetch_mac_kenv(sc, macaddr) == 0) { 1208 /* Tell the HAL now about the new MAC */ 1209 ath_hal_setmac(ah, macaddr); 1210 } else { 1211 ath_hal_getmac(ah, macaddr); 1212 } 1213 1214 if (sc->sc_hasbmask) 1215 ath_hal_getbssidmask(ah, sc->sc_hwbssidmask); 1216 1217 /* NB: used to size node table key mapping array */ 1218 ic->ic_max_keyix = sc->sc_keymax; 1219 /* call MI attach routine. */ 1220 ieee80211_ifattach(ic, macaddr); 1221 ic->ic_setregdomain = ath_setregdomain; 1222 ic->ic_getradiocaps = ath_getradiocaps; 1223 sc->sc_opmode = HAL_M_STA; 1224 1225 /* override default methods */ 1226 ic->ic_newassoc = ath_newassoc; 1227 ic->ic_updateslot = ath_updateslot; 1228 ic->ic_wme.wme_update = ath_wme_update; 1229 ic->ic_vap_create = ath_vap_create; 1230 ic->ic_vap_delete = ath_vap_delete; 1231 ic->ic_raw_xmit = ath_raw_xmit; 1232 ic->ic_update_mcast = ath_update_mcast; 1233 ic->ic_update_promisc = ath_update_promisc; 1234 ic->ic_node_alloc = ath_node_alloc; 1235 sc->sc_node_free = ic->ic_node_free; 1236 ic->ic_node_free = ath_node_free; 1237 sc->sc_node_cleanup = ic->ic_node_cleanup; 1238 ic->ic_node_cleanup = ath_node_cleanup; 1239 ic->ic_node_getsignal = ath_node_getsignal; 1240 ic->ic_scan_start = ath_scan_start; 1241 ic->ic_scan_end = ath_scan_end; 1242 ic->ic_set_channel = ath_set_channel; 1243 #ifdef ATH_ENABLE_11N 1244 /* 802.11n specific - but just override anyway */ 1245 sc->sc_addba_request = ic->ic_addba_request; 1246 sc->sc_addba_response = ic->ic_addba_response; 1247 sc->sc_addba_stop = ic->ic_addba_stop; 1248 sc->sc_bar_response = ic->ic_bar_response; 1249 sc->sc_addba_response_timeout = ic->ic_addba_response_timeout; 1250 1251 ic->ic_addba_request = ath_addba_request; 1252 ic->ic_addba_response = ath_addba_response; 1253 ic->ic_addba_response_timeout = ath_addba_response_timeout; 1254 ic->ic_addba_stop = ath_addba_stop; 1255 ic->ic_bar_response = ath_bar_response; 1256 1257 ic->ic_update_chw = ath_update_chw; 1258 #endif /* ATH_ENABLE_11N */ 1259 1260 #ifdef ATH_ENABLE_RADIOTAP_VENDOR_EXT 1261 /* 1262 * There's one vendor bitmap entry in the RX radiotap 1263 * header; make sure that's taken into account. 1264 */ 1265 ieee80211_radiotap_attachv(ic, 1266 &sc->sc_tx_th.wt_ihdr, sizeof(sc->sc_tx_th), 0, 1267 ATH_TX_RADIOTAP_PRESENT, 1268 &sc->sc_rx_th.wr_ihdr, sizeof(sc->sc_rx_th), 1, 1269 ATH_RX_RADIOTAP_PRESENT); 1270 #else 1271 /* 1272 * No vendor bitmap/extensions are present. 1273 */ 1274 ieee80211_radiotap_attach(ic, 1275 &sc->sc_tx_th.wt_ihdr, sizeof(sc->sc_tx_th), 1276 ATH_TX_RADIOTAP_PRESENT, 1277 &sc->sc_rx_th.wr_ihdr, sizeof(sc->sc_rx_th), 1278 ATH_RX_RADIOTAP_PRESENT); 1279 #endif /* ATH_ENABLE_RADIOTAP_VENDOR_EXT */ 1280 1281 /* 1282 * Setup the ALQ logging if required 1283 */ 1284 #ifdef ATH_DEBUG_ALQ 1285 if_ath_alq_init(&sc->sc_alq, device_get_nameunit(sc->sc_dev)); 1286 if_ath_alq_setcfg(&sc->sc_alq, 1287 sc->sc_ah->ah_macVersion, 1288 sc->sc_ah->ah_macRev, 1289 sc->sc_ah->ah_phyRev, 1290 sc->sc_ah->ah_magic); 1291 #endif 1292 1293 /* 1294 * Setup dynamic sysctl's now that country code and 1295 * regdomain are available from the hal. 1296 */ 1297 ath_sysctlattach(sc); 1298 ath_sysctl_stats_attach(sc); 1299 ath_sysctl_hal_attach(sc); 1300 1301 if (bootverbose) 1302 ieee80211_announce(ic); 1303 ath_announce(sc); 1304 1305 /* 1306 * Put it to sleep for now. 1307 */ 1308 ATH_LOCK(sc); 1309 ath_power_setpower(sc, HAL_PM_FULL_SLEEP); 1310 ATH_UNLOCK(sc); 1311 1312 return 0; 1313 bad2: 1314 ath_tx_cleanup(sc); 1315 ath_desc_free(sc); 1316 ath_txdma_teardown(sc); 1317 ath_rxdma_teardown(sc); 1318 bad: 1319 if (ah) 1320 ath_hal_detach(ah); 1321 1322 /* 1323 * To work around scoping issues with CURVNET_SET/CURVNET_RESTORE.. 1324 */ 1325 if (ifp != NULL && ifp->if_vnet) { 1326 CURVNET_SET(ifp->if_vnet); 1327 if_free(ifp); 1328 CURVNET_RESTORE(); 1329 } else if (ifp != NULL) 1330 if_free(ifp); 1331 sc->sc_invalid = 1; 1332 return error; 1333 } 1334 1335 int 1336 ath_detach(struct ath_softc *sc) 1337 { 1338 struct ifnet *ifp = sc->sc_ifp; 1339 1340 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 1341 __func__, ifp->if_flags); 1342 1343 /* 1344 * NB: the order of these is important: 1345 * o stop the chip so no more interrupts will fire 1346 * o call the 802.11 layer before detaching the hal to 1347 * insure callbacks into the driver to delete global 1348 * key cache entries can be handled 1349 * o free the taskqueue which drains any pending tasks 1350 * o reclaim the tx queue data structures after calling 1351 * the 802.11 layer as we'll get called back to reclaim 1352 * node state and potentially want to use them 1353 * o to cleanup the tx queues the hal is called, so detach 1354 * it last 1355 * Other than that, it's straightforward... 1356 */ 1357 1358 /* 1359 * XXX Wake the hardware up first. ath_stop() will still 1360 * wake it up first, but I'd rather do it here just to 1361 * ensure it's awake. 1362 */ 1363 ATH_LOCK(sc); 1364 ath_power_set_power_state(sc, HAL_PM_AWAKE); 1365 ath_power_setpower(sc, HAL_PM_AWAKE); 1366 ATH_UNLOCK(sc); 1367 1368 /* 1369 * Stop things cleanly. 1370 */ 1371 ath_stop(ifp); 1372 1373 ieee80211_ifdetach(ifp->if_l2com); 1374 taskqueue_free(sc->sc_tq); 1375 #ifdef ATH_TX99_DIAG 1376 if (sc->sc_tx99 != NULL) 1377 sc->sc_tx99->detach(sc->sc_tx99); 1378 #endif 1379 ath_rate_detach(sc->sc_rc); 1380 #ifdef ATH_DEBUG_ALQ 1381 if_ath_alq_tidyup(&sc->sc_alq); 1382 #endif 1383 ath_lna_div_detach(sc); 1384 ath_btcoex_detach(sc); 1385 ath_spectral_detach(sc); 1386 ath_dfs_detach(sc); 1387 ath_desc_free(sc); 1388 ath_txdma_teardown(sc); 1389 ath_rxdma_teardown(sc); 1390 ath_tx_cleanup(sc); 1391 ath_hal_detach(sc->sc_ah); /* NB: sets chip in full sleep */ 1392 1393 CURVNET_SET(ifp->if_vnet); 1394 if_free(ifp); 1395 CURVNET_RESTORE(); 1396 1397 return 0; 1398 } 1399 1400 /* 1401 * MAC address handling for multiple BSS on the same radio. 1402 * The first vap uses the MAC address from the EEPROM. For 1403 * subsequent vap's we set the U/L bit (bit 1) in the MAC 1404 * address and use the next six bits as an index. 1405 */ 1406 static void 1407 assign_address(struct ath_softc *sc, uint8_t mac[IEEE80211_ADDR_LEN], int clone) 1408 { 1409 int i; 1410 1411 if (clone && sc->sc_hasbmask) { 1412 /* NB: we only do this if h/w supports multiple bssid */ 1413 for (i = 0; i < 8; i++) 1414 if ((sc->sc_bssidmask & (1<<i)) == 0) 1415 break; 1416 if (i != 0) 1417 mac[0] |= (i << 2)|0x2; 1418 } else 1419 i = 0; 1420 sc->sc_bssidmask |= 1<<i; 1421 sc->sc_hwbssidmask[0] &= ~mac[0]; 1422 if (i == 0) 1423 sc->sc_nbssid0++; 1424 } 1425 1426 static void 1427 reclaim_address(struct ath_softc *sc, const uint8_t mac[IEEE80211_ADDR_LEN]) 1428 { 1429 int i = mac[0] >> 2; 1430 uint8_t mask; 1431 1432 if (i != 0 || --sc->sc_nbssid0 == 0) { 1433 sc->sc_bssidmask &= ~(1<<i); 1434 /* recalculate bssid mask from remaining addresses */ 1435 mask = 0xff; 1436 for (i = 1; i < 8; i++) 1437 if (sc->sc_bssidmask & (1<<i)) 1438 mask &= ~((i<<2)|0x2); 1439 sc->sc_hwbssidmask[0] |= mask; 1440 } 1441 } 1442 1443 /* 1444 * Assign a beacon xmit slot. We try to space out 1445 * assignments so when beacons are staggered the 1446 * traffic coming out of the cab q has maximal time 1447 * to go out before the next beacon is scheduled. 1448 */ 1449 static int 1450 assign_bslot(struct ath_softc *sc) 1451 { 1452 u_int slot, free; 1453 1454 free = 0; 1455 for (slot = 0; slot < ATH_BCBUF; slot++) 1456 if (sc->sc_bslot[slot] == NULL) { 1457 if (sc->sc_bslot[(slot+1)%ATH_BCBUF] == NULL && 1458 sc->sc_bslot[(slot-1)%ATH_BCBUF] == NULL) 1459 return slot; 1460 free = slot; 1461 /* NB: keep looking for a double slot */ 1462 } 1463 return free; 1464 } 1465 1466 static struct ieee80211vap * 1467 ath_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit, 1468 enum ieee80211_opmode opmode, int flags, 1469 const uint8_t bssid[IEEE80211_ADDR_LEN], 1470 const uint8_t mac0[IEEE80211_ADDR_LEN]) 1471 { 1472 struct ath_softc *sc = ic->ic_ifp->if_softc; 1473 struct ath_vap *avp; 1474 struct ieee80211vap *vap; 1475 uint8_t mac[IEEE80211_ADDR_LEN]; 1476 int needbeacon, error; 1477 enum ieee80211_opmode ic_opmode; 1478 1479 avp = (struct ath_vap *) malloc(sizeof(struct ath_vap), 1480 M_80211_VAP, M_WAITOK | M_ZERO); 1481 needbeacon = 0; 1482 IEEE80211_ADDR_COPY(mac, mac0); 1483 1484 ATH_LOCK(sc); 1485 ic_opmode = opmode; /* default to opmode of new vap */ 1486 switch (opmode) { 1487 case IEEE80211_M_STA: 1488 if (sc->sc_nstavaps != 0) { /* XXX only 1 for now */ 1489 device_printf(sc->sc_dev, "only 1 sta vap supported\n"); 1490 goto bad; 1491 } 1492 if (sc->sc_nvaps) { 1493 /* 1494 * With multiple vaps we must fall back 1495 * to s/w beacon miss handling. 1496 */ 1497 flags |= IEEE80211_CLONE_NOBEACONS; 1498 } 1499 if (flags & IEEE80211_CLONE_NOBEACONS) { 1500 /* 1501 * Station mode w/o beacons are implemented w/ AP mode. 1502 */ 1503 ic_opmode = IEEE80211_M_HOSTAP; 1504 } 1505 break; 1506 case IEEE80211_M_IBSS: 1507 if (sc->sc_nvaps != 0) { /* XXX only 1 for now */ 1508 device_printf(sc->sc_dev, 1509 "only 1 ibss vap supported\n"); 1510 goto bad; 1511 } 1512 needbeacon = 1; 1513 break; 1514 case IEEE80211_M_AHDEMO: 1515 #ifdef IEEE80211_SUPPORT_TDMA 1516 if (flags & IEEE80211_CLONE_TDMA) { 1517 if (sc->sc_nvaps != 0) { 1518 device_printf(sc->sc_dev, 1519 "only 1 tdma vap supported\n"); 1520 goto bad; 1521 } 1522 needbeacon = 1; 1523 flags |= IEEE80211_CLONE_NOBEACONS; 1524 } 1525 /* fall thru... */ 1526 #endif 1527 case IEEE80211_M_MONITOR: 1528 if (sc->sc_nvaps != 0 && ic->ic_opmode != opmode) { 1529 /* 1530 * Adopt existing mode. Adding a monitor or ahdemo 1531 * vap to an existing configuration is of dubious 1532 * value but should be ok. 1533 */ 1534 /* XXX not right for monitor mode */ 1535 ic_opmode = ic->ic_opmode; 1536 } 1537 break; 1538 case IEEE80211_M_HOSTAP: 1539 case IEEE80211_M_MBSS: 1540 needbeacon = 1; 1541 break; 1542 case IEEE80211_M_WDS: 1543 if (sc->sc_nvaps != 0 && ic->ic_opmode == IEEE80211_M_STA) { 1544 device_printf(sc->sc_dev, 1545 "wds not supported in sta mode\n"); 1546 goto bad; 1547 } 1548 /* 1549 * Silently remove any request for a unique 1550 * bssid; WDS vap's always share the local 1551 * mac address. 1552 */ 1553 flags &= ~IEEE80211_CLONE_BSSID; 1554 if (sc->sc_nvaps == 0) 1555 ic_opmode = IEEE80211_M_HOSTAP; 1556 else 1557 ic_opmode = ic->ic_opmode; 1558 break; 1559 default: 1560 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode); 1561 goto bad; 1562 } 1563 /* 1564 * Check that a beacon buffer is available; the code below assumes it. 1565 */ 1566 if (needbeacon & TAILQ_EMPTY(&sc->sc_bbuf)) { 1567 device_printf(sc->sc_dev, "no beacon buffer available\n"); 1568 goto bad; 1569 } 1570 1571 /* STA, AHDEMO? */ 1572 if (opmode == IEEE80211_M_HOSTAP || opmode == IEEE80211_M_MBSS) { 1573 assign_address(sc, mac, flags & IEEE80211_CLONE_BSSID); 1574 ath_hal_setbssidmask(sc->sc_ah, sc->sc_hwbssidmask); 1575 } 1576 1577 vap = &avp->av_vap; 1578 /* XXX can't hold mutex across if_alloc */ 1579 ATH_UNLOCK(sc); 1580 error = ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, 1581 bssid, mac); 1582 ATH_LOCK(sc); 1583 if (error != 0) { 1584 device_printf(sc->sc_dev, "%s: error %d creating vap\n", 1585 __func__, error); 1586 goto bad2; 1587 } 1588 1589 /* h/w crypto support */ 1590 vap->iv_key_alloc = ath_key_alloc; 1591 vap->iv_key_delete = ath_key_delete; 1592 vap->iv_key_set = ath_key_set; 1593 vap->iv_key_update_begin = ath_key_update_begin; 1594 vap->iv_key_update_end = ath_key_update_end; 1595 1596 /* override various methods */ 1597 avp->av_recv_mgmt = vap->iv_recv_mgmt; 1598 vap->iv_recv_mgmt = ath_recv_mgmt; 1599 vap->iv_reset = ath_reset_vap; 1600 vap->iv_update_beacon = ath_beacon_update; 1601 avp->av_newstate = vap->iv_newstate; 1602 vap->iv_newstate = ath_newstate; 1603 avp->av_bmiss = vap->iv_bmiss; 1604 vap->iv_bmiss = ath_bmiss_vap; 1605 1606 avp->av_node_ps = vap->iv_node_ps; 1607 vap->iv_node_ps = ath_node_powersave; 1608 1609 avp->av_set_tim = vap->iv_set_tim; 1610 vap->iv_set_tim = ath_node_set_tim; 1611 1612 avp->av_recv_pspoll = vap->iv_recv_pspoll; 1613 vap->iv_recv_pspoll = ath_node_recv_pspoll; 1614 1615 /* Set default parameters */ 1616 1617 /* 1618 * Anything earlier than some AR9300 series MACs don't 1619 * support a smaller MPDU density. 1620 */ 1621 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_8; 1622 /* 1623 * All NICs can handle the maximum size, however 1624 * AR5416 based MACs can only TX aggregates w/ RTS 1625 * protection when the total aggregate size is <= 8k. 1626 * However, for now that's enforced by the TX path. 1627 */ 1628 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_64K; 1629 1630 avp->av_bslot = -1; 1631 if (needbeacon) { 1632 /* 1633 * Allocate beacon state and setup the q for buffered 1634 * multicast frames. We know a beacon buffer is 1635 * available because we checked above. 1636 */ 1637 avp->av_bcbuf = TAILQ_FIRST(&sc->sc_bbuf); 1638 TAILQ_REMOVE(&sc->sc_bbuf, avp->av_bcbuf, bf_list); 1639 if (opmode != IEEE80211_M_IBSS || !sc->sc_hasveol) { 1640 /* 1641 * Assign the vap to a beacon xmit slot. As above 1642 * this cannot fail to find a free one. 1643 */ 1644 avp->av_bslot = assign_bslot(sc); 1645 KASSERT(sc->sc_bslot[avp->av_bslot] == NULL, 1646 ("beacon slot %u not empty", avp->av_bslot)); 1647 sc->sc_bslot[avp->av_bslot] = vap; 1648 sc->sc_nbcnvaps++; 1649 } 1650 if (sc->sc_hastsfadd && sc->sc_nbcnvaps > 0) { 1651 /* 1652 * Multple vaps are to transmit beacons and we 1653 * have h/w support for TSF adjusting; enable 1654 * use of staggered beacons. 1655 */ 1656 sc->sc_stagbeacons = 1; 1657 } 1658 ath_txq_init(sc, &avp->av_mcastq, ATH_TXQ_SWQ); 1659 } 1660 1661 ic->ic_opmode = ic_opmode; 1662 if (opmode != IEEE80211_M_WDS) { 1663 sc->sc_nvaps++; 1664 if (opmode == IEEE80211_M_STA) 1665 sc->sc_nstavaps++; 1666 if (opmode == IEEE80211_M_MBSS) 1667 sc->sc_nmeshvaps++; 1668 } 1669 switch (ic_opmode) { 1670 case IEEE80211_M_IBSS: 1671 sc->sc_opmode = HAL_M_IBSS; 1672 break; 1673 case IEEE80211_M_STA: 1674 sc->sc_opmode = HAL_M_STA; 1675 break; 1676 case IEEE80211_M_AHDEMO: 1677 #ifdef IEEE80211_SUPPORT_TDMA 1678 if (vap->iv_caps & IEEE80211_C_TDMA) { 1679 sc->sc_tdma = 1; 1680 /* NB: disable tsf adjust */ 1681 sc->sc_stagbeacons = 0; 1682 } 1683 /* 1684 * NB: adhoc demo mode is a pseudo mode; to the hal it's 1685 * just ap mode. 1686 */ 1687 /* fall thru... */ 1688 #endif 1689 case IEEE80211_M_HOSTAP: 1690 case IEEE80211_M_MBSS: 1691 sc->sc_opmode = HAL_M_HOSTAP; 1692 break; 1693 case IEEE80211_M_MONITOR: 1694 sc->sc_opmode = HAL_M_MONITOR; 1695 break; 1696 default: 1697 /* XXX should not happen */ 1698 break; 1699 } 1700 if (sc->sc_hastsfadd) { 1701 /* 1702 * Configure whether or not TSF adjust should be done. 1703 */ 1704 ath_hal_settsfadjust(sc->sc_ah, sc->sc_stagbeacons); 1705 } 1706 if (flags & IEEE80211_CLONE_NOBEACONS) { 1707 /* 1708 * Enable s/w beacon miss handling. 1709 */ 1710 sc->sc_swbmiss = 1; 1711 } 1712 ATH_UNLOCK(sc); 1713 1714 /* complete setup */ 1715 ieee80211_vap_attach(vap, ath_media_change, ieee80211_media_status); 1716 return vap; 1717 bad2: 1718 reclaim_address(sc, mac); 1719 ath_hal_setbssidmask(sc->sc_ah, sc->sc_hwbssidmask); 1720 bad: 1721 free(avp, M_80211_VAP); 1722 ATH_UNLOCK(sc); 1723 return NULL; 1724 } 1725 1726 static void 1727 ath_vap_delete(struct ieee80211vap *vap) 1728 { 1729 struct ieee80211com *ic = vap->iv_ic; 1730 struct ifnet *ifp = ic->ic_ifp; 1731 struct ath_softc *sc = ifp->if_softc; 1732 struct ath_hal *ah = sc->sc_ah; 1733 struct ath_vap *avp = ATH_VAP(vap); 1734 1735 ATH_LOCK(sc); 1736 ath_power_set_power_state(sc, HAL_PM_AWAKE); 1737 ATH_UNLOCK(sc); 1738 1739 DPRINTF(sc, ATH_DEBUG_RESET, "%s: called\n", __func__); 1740 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1741 /* 1742 * Quiesce the hardware while we remove the vap. In 1743 * particular we need to reclaim all references to 1744 * the vap state by any frames pending on the tx queues. 1745 */ 1746 ath_hal_intrset(ah, 0); /* disable interrupts */ 1747 /* XXX Do all frames from all vaps/nodes need draining here? */ 1748 ath_stoprecv(sc, 1); /* stop recv side */ 1749 ath_draintxq(sc, ATH_RESET_DEFAULT); /* stop hw xmit side */ 1750 } 1751 1752 /* .. leave the hardware awake for now. */ 1753 1754 ieee80211_vap_detach(vap); 1755 1756 /* 1757 * XXX Danger Will Robinson! Danger! 1758 * 1759 * Because ieee80211_vap_detach() can queue a frame (the station 1760 * diassociate message?) after we've drained the TXQ and 1761 * flushed the software TXQ, we will end up with a frame queued 1762 * to a node whose vap is about to be freed. 1763 * 1764 * To work around this, flush the hardware/software again. 1765 * This may be racy - the ath task may be running and the packet 1766 * may be being scheduled between sw->hw txq. Tsk. 1767 * 1768 * TODO: figure out why a new node gets allocated somewhere around 1769 * here (after the ath_tx_swq() call; and after an ath_stop_locked() 1770 * call!) 1771 */ 1772 1773 ath_draintxq(sc, ATH_RESET_DEFAULT); 1774 1775 ATH_LOCK(sc); 1776 /* 1777 * Reclaim beacon state. Note this must be done before 1778 * the vap instance is reclaimed as we may have a reference 1779 * to it in the buffer for the beacon frame. 1780 */ 1781 if (avp->av_bcbuf != NULL) { 1782 if (avp->av_bslot != -1) { 1783 sc->sc_bslot[avp->av_bslot] = NULL; 1784 sc->sc_nbcnvaps--; 1785 } 1786 ath_beacon_return(sc, avp->av_bcbuf); 1787 avp->av_bcbuf = NULL; 1788 if (sc->sc_nbcnvaps == 0) { 1789 sc->sc_stagbeacons = 0; 1790 if (sc->sc_hastsfadd) 1791 ath_hal_settsfadjust(sc->sc_ah, 0); 1792 } 1793 /* 1794 * Reclaim any pending mcast frames for the vap. 1795 */ 1796 ath_tx_draintxq(sc, &avp->av_mcastq); 1797 } 1798 /* 1799 * Update bookkeeping. 1800 */ 1801 if (vap->iv_opmode == IEEE80211_M_STA) { 1802 sc->sc_nstavaps--; 1803 if (sc->sc_nstavaps == 0 && sc->sc_swbmiss) 1804 sc->sc_swbmiss = 0; 1805 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1806 vap->iv_opmode == IEEE80211_M_MBSS) { 1807 reclaim_address(sc, vap->iv_myaddr); 1808 ath_hal_setbssidmask(ah, sc->sc_hwbssidmask); 1809 if (vap->iv_opmode == IEEE80211_M_MBSS) 1810 sc->sc_nmeshvaps--; 1811 } 1812 if (vap->iv_opmode != IEEE80211_M_WDS) 1813 sc->sc_nvaps--; 1814 #ifdef IEEE80211_SUPPORT_TDMA 1815 /* TDMA operation ceases when the last vap is destroyed */ 1816 if (sc->sc_tdma && sc->sc_nvaps == 0) { 1817 sc->sc_tdma = 0; 1818 sc->sc_swbmiss = 0; 1819 } 1820 #endif 1821 free(avp, M_80211_VAP); 1822 1823 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1824 /* 1825 * Restart rx+tx machines if still running (RUNNING will 1826 * be reset if we just destroyed the last vap). 1827 */ 1828 if (ath_startrecv(sc) != 0) 1829 if_printf(ifp, "%s: unable to restart recv logic\n", 1830 __func__); 1831 if (sc->sc_beacons) { /* restart beacons */ 1832 #ifdef IEEE80211_SUPPORT_TDMA 1833 if (sc->sc_tdma) 1834 ath_tdma_config(sc, NULL); 1835 else 1836 #endif 1837 ath_beacon_config(sc, NULL); 1838 } 1839 ath_hal_intrset(ah, sc->sc_imask); 1840 } 1841 1842 /* Ok, let the hardware asleep. */ 1843 ath_power_restore_power_state(sc); 1844 ATH_UNLOCK(sc); 1845 } 1846 1847 void 1848 ath_suspend(struct ath_softc *sc) 1849 { 1850 struct ifnet *ifp = sc->sc_ifp; 1851 struct ieee80211com *ic = ifp->if_l2com; 1852 1853 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 1854 __func__, ifp->if_flags); 1855 1856 sc->sc_resume_up = (ifp->if_flags & IFF_UP) != 0; 1857 1858 ieee80211_suspend_all(ic); 1859 /* 1860 * NB: don't worry about putting the chip in low power 1861 * mode; pci will power off our socket on suspend and 1862 * CardBus detaches the device. 1863 * 1864 * XXX TODO: well, that's great, except for non-cardbus 1865 * devices! 1866 */ 1867 1868 /* 1869 * XXX This doesn't wait until all pending taskqueue 1870 * items and parallel transmit/receive/other threads 1871 * are running! 1872 */ 1873 ath_hal_intrset(sc->sc_ah, 0); 1874 taskqueue_block(sc->sc_tq); 1875 1876 ATH_LOCK(sc); 1877 callout_stop(&sc->sc_cal_ch); 1878 ATH_UNLOCK(sc); 1879 1880 /* 1881 * XXX ensure sc_invalid is 1 1882 */ 1883 1884 /* Disable the PCIe PHY, complete with workarounds */ 1885 ath_hal_enablepcie(sc->sc_ah, 1, 1); 1886 } 1887 1888 /* 1889 * Reset the key cache since some parts do not reset the 1890 * contents on resume. First we clear all entries, then 1891 * re-load keys that the 802.11 layer assumes are setup 1892 * in h/w. 1893 */ 1894 static void 1895 ath_reset_keycache(struct ath_softc *sc) 1896 { 1897 struct ifnet *ifp = sc->sc_ifp; 1898 struct ieee80211com *ic = ifp->if_l2com; 1899 struct ath_hal *ah = sc->sc_ah; 1900 int i; 1901 1902 ATH_LOCK(sc); 1903 ath_power_set_power_state(sc, HAL_PM_AWAKE); 1904 for (i = 0; i < sc->sc_keymax; i++) 1905 ath_hal_keyreset(ah, i); 1906 ath_power_restore_power_state(sc); 1907 ATH_UNLOCK(sc); 1908 ieee80211_crypto_reload_keys(ic); 1909 } 1910 1911 /* 1912 * Fetch the current chainmask configuration based on the current 1913 * operating channel and options. 1914 */ 1915 static void 1916 ath_update_chainmasks(struct ath_softc *sc, struct ieee80211_channel *chan) 1917 { 1918 1919 /* 1920 * Set TX chainmask to the currently configured chainmask; 1921 * the TX chainmask depends upon the current operating mode. 1922 */ 1923 sc->sc_cur_rxchainmask = sc->sc_rxchainmask; 1924 if (IEEE80211_IS_CHAN_HT(chan)) { 1925 sc->sc_cur_txchainmask = sc->sc_txchainmask; 1926 } else { 1927 sc->sc_cur_txchainmask = 1; 1928 } 1929 1930 DPRINTF(sc, ATH_DEBUG_RESET, 1931 "%s: TX chainmask is now 0x%x, RX is now 0x%x\n", 1932 __func__, 1933 sc->sc_cur_txchainmask, 1934 sc->sc_cur_rxchainmask); 1935 } 1936 1937 void 1938 ath_resume(struct ath_softc *sc) 1939 { 1940 struct ifnet *ifp = sc->sc_ifp; 1941 struct ieee80211com *ic = ifp->if_l2com; 1942 struct ath_hal *ah = sc->sc_ah; 1943 HAL_STATUS status; 1944 1945 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 1946 __func__, ifp->if_flags); 1947 1948 /* Re-enable PCIe, re-enable the PCIe bus */ 1949 ath_hal_enablepcie(ah, 0, 0); 1950 1951 /* 1952 * Must reset the chip before we reload the 1953 * keycache as we were powered down on suspend. 1954 */ 1955 ath_update_chainmasks(sc, 1956 sc->sc_curchan != NULL ? sc->sc_curchan : ic->ic_curchan); 1957 ath_hal_setchainmasks(sc->sc_ah, sc->sc_cur_txchainmask, 1958 sc->sc_cur_rxchainmask); 1959 1960 /* Ensure we set the current power state to on */ 1961 ATH_LOCK(sc); 1962 ath_power_setselfgen(sc, HAL_PM_AWAKE); 1963 ath_power_set_power_state(sc, HAL_PM_AWAKE); 1964 ath_power_setpower(sc, HAL_PM_AWAKE); 1965 ATH_UNLOCK(sc); 1966 1967 ath_hal_reset(ah, sc->sc_opmode, 1968 sc->sc_curchan != NULL ? sc->sc_curchan : ic->ic_curchan, 1969 AH_FALSE, &status); 1970 ath_reset_keycache(sc); 1971 1972 ATH_RX_LOCK(sc); 1973 sc->sc_rx_stopped = 1; 1974 sc->sc_rx_resetted = 1; 1975 ATH_RX_UNLOCK(sc); 1976 1977 /* Let DFS at it in case it's a DFS channel */ 1978 ath_dfs_radar_enable(sc, ic->ic_curchan); 1979 1980 /* Let spectral at in case spectral is enabled */ 1981 ath_spectral_enable(sc, ic->ic_curchan); 1982 1983 /* 1984 * Let bluetooth coexistence at in case it's needed for this channel 1985 */ 1986 ath_btcoex_enable(sc, ic->ic_curchan); 1987 1988 /* 1989 * If we're doing TDMA, enforce the TXOP limitation for chips that 1990 * support it. 1991 */ 1992 if (sc->sc_hasenforcetxop && sc->sc_tdma) 1993 ath_hal_setenforcetxop(sc->sc_ah, 1); 1994 else 1995 ath_hal_setenforcetxop(sc->sc_ah, 0); 1996 1997 /* Restore the LED configuration */ 1998 ath_led_config(sc); 1999 ath_hal_setledstate(ah, HAL_LED_INIT); 2000 2001 if (sc->sc_resume_up) 2002 ieee80211_resume_all(ic); 2003 2004 ATH_LOCK(sc); 2005 ath_power_restore_power_state(sc); 2006 ATH_UNLOCK(sc); 2007 2008 /* XXX beacons ? */ 2009 } 2010 2011 void 2012 ath_shutdown(struct ath_softc *sc) 2013 { 2014 struct ifnet *ifp = sc->sc_ifp; 2015 2016 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 2017 __func__, ifp->if_flags); 2018 2019 ath_stop(ifp); 2020 /* NB: no point powering down chip as we're about to reboot */ 2021 } 2022 2023 /* 2024 * Interrupt handler. Most of the actual processing is deferred. 2025 */ 2026 void 2027 ath_intr(void *arg) 2028 { 2029 struct ath_softc *sc = arg; 2030 struct ifnet *ifp = sc->sc_ifp; 2031 struct ath_hal *ah = sc->sc_ah; 2032 HAL_INT status = 0; 2033 uint32_t txqs; 2034 2035 /* 2036 * If we're inside a reset path, just print a warning and 2037 * clear the ISR. The reset routine will finish it for us. 2038 */ 2039 ATH_PCU_LOCK(sc); 2040 if (sc->sc_inreset_cnt) { 2041 HAL_INT status; 2042 ath_hal_getisr(ah, &status); /* clear ISR */ 2043 ath_hal_intrset(ah, 0); /* disable further intr's */ 2044 DPRINTF(sc, ATH_DEBUG_ANY, 2045 "%s: in reset, ignoring: status=0x%x\n", 2046 __func__, status); 2047 ATH_PCU_UNLOCK(sc); 2048 return; 2049 } 2050 2051 if (sc->sc_invalid) { 2052 /* 2053 * The hardware is not ready/present, don't touch anything. 2054 * Note this can happen early on if the IRQ is shared. 2055 */ 2056 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid; ignored\n", __func__); 2057 ATH_PCU_UNLOCK(sc); 2058 return; 2059 } 2060 if (!ath_hal_intrpend(ah)) { /* shared irq, not for us */ 2061 ATH_PCU_UNLOCK(sc); 2062 return; 2063 } 2064 2065 ATH_LOCK(sc); 2066 ath_power_set_power_state(sc, HAL_PM_AWAKE); 2067 ATH_UNLOCK(sc); 2068 2069 if ((ifp->if_flags & IFF_UP) == 0 || 2070 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 2071 HAL_INT status; 2072 2073 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 2074 __func__, ifp->if_flags); 2075 ath_hal_getisr(ah, &status); /* clear ISR */ 2076 ath_hal_intrset(ah, 0); /* disable further intr's */ 2077 ATH_PCU_UNLOCK(sc); 2078 2079 ATH_LOCK(sc); 2080 ath_power_restore_power_state(sc); 2081 ATH_UNLOCK(sc); 2082 return; 2083 } 2084 2085 /* 2086 * Figure out the reason(s) for the interrupt. Note 2087 * that the hal returns a pseudo-ISR that may include 2088 * bits we haven't explicitly enabled so we mask the 2089 * value to insure we only process bits we requested. 2090 */ 2091 ath_hal_getisr(ah, &status); /* NB: clears ISR too */ 2092 DPRINTF(sc, ATH_DEBUG_INTR, "%s: status 0x%x\n", __func__, status); 2093 ATH_KTR(sc, ATH_KTR_INTERRUPTS, 1, "ath_intr: mask=0x%.8x", status); 2094 #ifdef ATH_DEBUG_ALQ 2095 if_ath_alq_post_intr(&sc->sc_alq, status, ah->ah_intrstate, 2096 ah->ah_syncstate); 2097 #endif /* ATH_DEBUG_ALQ */ 2098 #ifdef ATH_KTR_INTR_DEBUG 2099 ATH_KTR(sc, ATH_KTR_INTERRUPTS, 5, 2100 "ath_intr: ISR=0x%.8x, ISR_S0=0x%.8x, ISR_S1=0x%.8x, ISR_S2=0x%.8x, ISR_S5=0x%.8x", 2101 ah->ah_intrstate[0], 2102 ah->ah_intrstate[1], 2103 ah->ah_intrstate[2], 2104 ah->ah_intrstate[3], 2105 ah->ah_intrstate[6]); 2106 #endif 2107 2108 /* Squirrel away SYNC interrupt debugging */ 2109 if (ah->ah_syncstate != 0) { 2110 int i; 2111 for (i = 0; i < 32; i++) 2112 if (ah->ah_syncstate & (i << i)) 2113 sc->sc_intr_stats.sync_intr[i]++; 2114 } 2115 2116 status &= sc->sc_imask; /* discard unasked for bits */ 2117 2118 /* Short-circuit un-handled interrupts */ 2119 if (status == 0x0) { 2120 ATH_PCU_UNLOCK(sc); 2121 2122 ATH_LOCK(sc); 2123 ath_power_restore_power_state(sc); 2124 ATH_UNLOCK(sc); 2125 2126 return; 2127 } 2128 2129 /* 2130 * Take a note that we're inside the interrupt handler, so 2131 * the reset routines know to wait. 2132 */ 2133 sc->sc_intr_cnt++; 2134 ATH_PCU_UNLOCK(sc); 2135 2136 /* 2137 * Handle the interrupt. We won't run concurrent with the reset 2138 * or channel change routines as they'll wait for sc_intr_cnt 2139 * to be 0 before continuing. 2140 */ 2141 if (status & HAL_INT_FATAL) { 2142 sc->sc_stats.ast_hardware++; 2143 ath_hal_intrset(ah, 0); /* disable intr's until reset */ 2144 taskqueue_enqueue(sc->sc_tq, &sc->sc_fataltask); 2145 } else { 2146 if (status & HAL_INT_SWBA) { 2147 /* 2148 * Software beacon alert--time to send a beacon. 2149 * Handle beacon transmission directly; deferring 2150 * this is too slow to meet timing constraints 2151 * under load. 2152 */ 2153 #ifdef IEEE80211_SUPPORT_TDMA 2154 if (sc->sc_tdma) { 2155 if (sc->sc_tdmaswba == 0) { 2156 struct ieee80211com *ic = ifp->if_l2com; 2157 struct ieee80211vap *vap = 2158 TAILQ_FIRST(&ic->ic_vaps); 2159 ath_tdma_beacon_send(sc, vap); 2160 sc->sc_tdmaswba = 2161 vap->iv_tdma->tdma_bintval; 2162 } else 2163 sc->sc_tdmaswba--; 2164 } else 2165 #endif 2166 { 2167 ath_beacon_proc(sc, 0); 2168 #ifdef IEEE80211_SUPPORT_SUPERG 2169 /* 2170 * Schedule the rx taskq in case there's no 2171 * traffic so any frames held on the staging 2172 * queue are aged and potentially flushed. 2173 */ 2174 sc->sc_rx.recv_sched(sc, 1); 2175 #endif 2176 } 2177 } 2178 if (status & HAL_INT_RXEOL) { 2179 int imask; 2180 ATH_KTR(sc, ATH_KTR_ERROR, 0, "ath_intr: RXEOL"); 2181 if (! sc->sc_isedma) { 2182 ATH_PCU_LOCK(sc); 2183 /* 2184 * NB: the hardware should re-read the link when 2185 * RXE bit is written, but it doesn't work at 2186 * least on older hardware revs. 2187 */ 2188 sc->sc_stats.ast_rxeol++; 2189 /* 2190 * Disable RXEOL/RXORN - prevent an interrupt 2191 * storm until the PCU logic can be reset. 2192 * In case the interface is reset some other 2193 * way before "sc_kickpcu" is called, don't 2194 * modify sc_imask - that way if it is reset 2195 * by a call to ath_reset() somehow, the 2196 * interrupt mask will be correctly reprogrammed. 2197 */ 2198 imask = sc->sc_imask; 2199 imask &= ~(HAL_INT_RXEOL | HAL_INT_RXORN); 2200 ath_hal_intrset(ah, imask); 2201 /* 2202 * Only blank sc_rxlink if we've not yet kicked 2203 * the PCU. 2204 * 2205 * This isn't entirely correct - the correct solution 2206 * would be to have a PCU lock and engage that for 2207 * the duration of the PCU fiddling; which would include 2208 * running the RX process. Otherwise we could end up 2209 * messing up the RX descriptor chain and making the 2210 * RX desc list much shorter. 2211 */ 2212 if (! sc->sc_kickpcu) 2213 sc->sc_rxlink = NULL; 2214 sc->sc_kickpcu = 1; 2215 ATH_PCU_UNLOCK(sc); 2216 } 2217 /* 2218 * Enqueue an RX proc to handle whatever 2219 * is in the RX queue. 2220 * This will then kick the PCU if required. 2221 */ 2222 sc->sc_rx.recv_sched(sc, 1); 2223 } 2224 if (status & HAL_INT_TXURN) { 2225 sc->sc_stats.ast_txurn++; 2226 /* bump tx trigger level */ 2227 ath_hal_updatetxtriglevel(ah, AH_TRUE); 2228 } 2229 /* 2230 * Handle both the legacy and RX EDMA interrupt bits. 2231 * Note that HAL_INT_RXLP is also HAL_INT_RXDESC. 2232 */ 2233 if (status & (HAL_INT_RX | HAL_INT_RXHP | HAL_INT_RXLP)) { 2234 sc->sc_stats.ast_rx_intr++; 2235 sc->sc_rx.recv_sched(sc, 1); 2236 } 2237 if (status & HAL_INT_TX) { 2238 sc->sc_stats.ast_tx_intr++; 2239 /* 2240 * Grab all the currently set bits in the HAL txq bitmap 2241 * and blank them. This is the only place we should be 2242 * doing this. 2243 */ 2244 if (! sc->sc_isedma) { 2245 ATH_PCU_LOCK(sc); 2246 txqs = 0xffffffff; 2247 ath_hal_gettxintrtxqs(sc->sc_ah, &txqs); 2248 ATH_KTR(sc, ATH_KTR_INTERRUPTS, 3, 2249 "ath_intr: TX; txqs=0x%08x, txq_active was 0x%08x, now 0x%08x", 2250 txqs, 2251 sc->sc_txq_active, 2252 sc->sc_txq_active | txqs); 2253 sc->sc_txq_active |= txqs; 2254 ATH_PCU_UNLOCK(sc); 2255 } 2256 taskqueue_enqueue(sc->sc_tq, &sc->sc_txtask); 2257 } 2258 if (status & HAL_INT_BMISS) { 2259 sc->sc_stats.ast_bmiss++; 2260 taskqueue_enqueue(sc->sc_tq, &sc->sc_bmisstask); 2261 } 2262 if (status & HAL_INT_GTT) 2263 sc->sc_stats.ast_tx_timeout++; 2264 if (status & HAL_INT_CST) 2265 sc->sc_stats.ast_tx_cst++; 2266 if (status & HAL_INT_MIB) { 2267 sc->sc_stats.ast_mib++; 2268 ATH_PCU_LOCK(sc); 2269 /* 2270 * Disable interrupts until we service the MIB 2271 * interrupt; otherwise it will continue to fire. 2272 */ 2273 ath_hal_intrset(ah, 0); 2274 /* 2275 * Let the hal handle the event. We assume it will 2276 * clear whatever condition caused the interrupt. 2277 */ 2278 ath_hal_mibevent(ah, &sc->sc_halstats); 2279 /* 2280 * Don't reset the interrupt if we've just 2281 * kicked the PCU, or we may get a nested 2282 * RXEOL before the rxproc has had a chance 2283 * to run. 2284 */ 2285 if (sc->sc_kickpcu == 0) 2286 ath_hal_intrset(ah, sc->sc_imask); 2287 ATH_PCU_UNLOCK(sc); 2288 } 2289 if (status & HAL_INT_RXORN) { 2290 /* NB: hal marks HAL_INT_FATAL when RXORN is fatal */ 2291 ATH_KTR(sc, ATH_KTR_ERROR, 0, "ath_intr: RXORN"); 2292 sc->sc_stats.ast_rxorn++; 2293 } 2294 if (status & HAL_INT_TSFOOR) { 2295 device_printf(sc->sc_dev, "%s: TSFOOR\n", __func__); 2296 sc->sc_syncbeacon = 1; 2297 } 2298 } 2299 ATH_PCU_LOCK(sc); 2300 sc->sc_intr_cnt--; 2301 ATH_PCU_UNLOCK(sc); 2302 2303 ATH_LOCK(sc); 2304 ath_power_restore_power_state(sc); 2305 ATH_UNLOCK(sc); 2306 } 2307 2308 static void 2309 ath_fatal_proc(void *arg, int pending) 2310 { 2311 struct ath_softc *sc = arg; 2312 struct ifnet *ifp = sc->sc_ifp; 2313 u_int32_t *state; 2314 u_int32_t len; 2315 void *sp; 2316 2317 if_printf(ifp, "hardware error; resetting\n"); 2318 /* 2319 * Fatal errors are unrecoverable. Typically these 2320 * are caused by DMA errors. Collect h/w state from 2321 * the hal so we can diagnose what's going on. 2322 */ 2323 if (ath_hal_getfatalstate(sc->sc_ah, &sp, &len)) { 2324 KASSERT(len >= 6*sizeof(u_int32_t), ("len %u bytes", len)); 2325 state = sp; 2326 if_printf(ifp, "0x%08x 0x%08x 0x%08x, 0x%08x 0x%08x 0x%08x\n", 2327 state[0], state[1] , state[2], state[3], 2328 state[4], state[5]); 2329 } 2330 ath_reset(ifp, ATH_RESET_NOLOSS); 2331 } 2332 2333 static void 2334 ath_bmiss_vap(struct ieee80211vap *vap) 2335 { 2336 struct ath_softc *sc = vap->iv_ic->ic_ifp->if_softc; 2337 2338 /* 2339 * Workaround phantom bmiss interrupts by sanity-checking 2340 * the time of our last rx'd frame. If it is within the 2341 * beacon miss interval then ignore the interrupt. If it's 2342 * truly a bmiss we'll get another interrupt soon and that'll 2343 * be dispatched up for processing. Note this applies only 2344 * for h/w beacon miss events. 2345 */ 2346 2347 /* 2348 * XXX TODO: Just read the TSF during the interrupt path; 2349 * that way we don't have to wake up again just to read it 2350 * again. 2351 */ 2352 ATH_LOCK(sc); 2353 ath_power_set_power_state(sc, HAL_PM_AWAKE); 2354 ATH_UNLOCK(sc); 2355 2356 if ((vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) == 0) { 2357 struct ifnet *ifp = vap->iv_ic->ic_ifp; 2358 struct ath_softc *sc = ifp->if_softc; 2359 u_int64_t lastrx = sc->sc_lastrx; 2360 u_int64_t tsf = ath_hal_gettsf64(sc->sc_ah); 2361 /* XXX should take a locked ref to iv_bss */ 2362 u_int bmisstimeout = 2363 vap->iv_bmissthreshold * vap->iv_bss->ni_intval * 1024; 2364 2365 DPRINTF(sc, ATH_DEBUG_BEACON, 2366 "%s: tsf %llu lastrx %lld (%llu) bmiss %u\n", 2367 __func__, (unsigned long long) tsf, 2368 (unsigned long long)(tsf - lastrx), 2369 (unsigned long long) lastrx, bmisstimeout); 2370 2371 if (tsf - lastrx <= bmisstimeout) { 2372 sc->sc_stats.ast_bmiss_phantom++; 2373 2374 ATH_LOCK(sc); 2375 ath_power_restore_power_state(sc); 2376 ATH_UNLOCK(sc); 2377 2378 return; 2379 } 2380 } 2381 2382 /* 2383 * There's no need to keep the hardware awake during the call 2384 * to av_bmiss(). 2385 */ 2386 ATH_LOCK(sc); 2387 ath_power_restore_power_state(sc); 2388 ATH_UNLOCK(sc); 2389 2390 /* 2391 * Attempt to force a beacon resync. 2392 */ 2393 sc->sc_syncbeacon = 1; 2394 2395 ATH_VAP(vap)->av_bmiss(vap); 2396 } 2397 2398 /* XXX this needs a force wakeup! */ 2399 int 2400 ath_hal_gethangstate(struct ath_hal *ah, uint32_t mask, uint32_t *hangs) 2401 { 2402 uint32_t rsize; 2403 void *sp; 2404 2405 if (!ath_hal_getdiagstate(ah, HAL_DIAG_CHECK_HANGS, &mask, sizeof(mask), &sp, &rsize)) 2406 return 0; 2407 KASSERT(rsize == sizeof(uint32_t), ("resultsize %u", rsize)); 2408 *hangs = *(uint32_t *)sp; 2409 return 1; 2410 } 2411 2412 static void 2413 ath_bmiss_proc(void *arg, int pending) 2414 { 2415 struct ath_softc *sc = arg; 2416 struct ifnet *ifp = sc->sc_ifp; 2417 uint32_t hangs; 2418 2419 DPRINTF(sc, ATH_DEBUG_ANY, "%s: pending %u\n", __func__, pending); 2420 2421 ATH_LOCK(sc); 2422 ath_power_set_power_state(sc, HAL_PM_AWAKE); 2423 ATH_UNLOCK(sc); 2424 2425 ath_beacon_miss(sc); 2426 2427 /* 2428 * Do a reset upon any becaon miss event. 2429 * 2430 * It may be a non-recognised RX clear hang which needs a reset 2431 * to clear. 2432 */ 2433 if (ath_hal_gethangstate(sc->sc_ah, 0xff, &hangs) && hangs != 0) { 2434 ath_reset(ifp, ATH_RESET_NOLOSS); 2435 if_printf(ifp, "bb hang detected (0x%x), resetting\n", hangs); 2436 } else { 2437 ath_reset(ifp, ATH_RESET_NOLOSS); 2438 ieee80211_beacon_miss(ifp->if_l2com); 2439 } 2440 2441 /* Force a beacon resync, in case they've drifted */ 2442 sc->sc_syncbeacon = 1; 2443 2444 ATH_LOCK(sc); 2445 ath_power_restore_power_state(sc); 2446 ATH_UNLOCK(sc); 2447 } 2448 2449 /* 2450 * Handle TKIP MIC setup to deal hardware that doesn't do MIC 2451 * calcs together with WME. If necessary disable the crypto 2452 * hardware and mark the 802.11 state so keys will be setup 2453 * with the MIC work done in software. 2454 */ 2455 static void 2456 ath_settkipmic(struct ath_softc *sc) 2457 { 2458 struct ifnet *ifp = sc->sc_ifp; 2459 struct ieee80211com *ic = ifp->if_l2com; 2460 2461 if ((ic->ic_cryptocaps & IEEE80211_CRYPTO_TKIP) && !sc->sc_wmetkipmic) { 2462 if (ic->ic_flags & IEEE80211_F_WME) { 2463 ath_hal_settkipmic(sc->sc_ah, AH_FALSE); 2464 ic->ic_cryptocaps &= ~IEEE80211_CRYPTO_TKIPMIC; 2465 } else { 2466 ath_hal_settkipmic(sc->sc_ah, AH_TRUE); 2467 ic->ic_cryptocaps |= IEEE80211_CRYPTO_TKIPMIC; 2468 } 2469 } 2470 } 2471 2472 static void 2473 ath_init(void *arg) 2474 { 2475 struct ath_softc *sc = (struct ath_softc *) arg; 2476 struct ifnet *ifp = sc->sc_ifp; 2477 struct ieee80211com *ic = ifp->if_l2com; 2478 struct ath_hal *ah = sc->sc_ah; 2479 HAL_STATUS status; 2480 2481 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 2482 __func__, ifp->if_flags); 2483 2484 ATH_LOCK(sc); 2485 /* 2486 * Force the sleep state awake. 2487 */ 2488 ath_power_setselfgen(sc, HAL_PM_AWAKE); 2489 ath_power_set_power_state(sc, HAL_PM_AWAKE); 2490 ath_power_setpower(sc, HAL_PM_AWAKE); 2491 2492 /* 2493 * Stop anything previously setup. This is safe 2494 * whether this is the first time through or not. 2495 */ 2496 ath_stop_locked(ifp); 2497 2498 /* 2499 * The basic interface to setting the hardware in a good 2500 * state is ``reset''. On return the hardware is known to 2501 * be powered up and with interrupts disabled. This must 2502 * be followed by initialization of the appropriate bits 2503 * and then setup of the interrupt mask. 2504 */ 2505 ath_settkipmic(sc); 2506 ath_update_chainmasks(sc, ic->ic_curchan); 2507 ath_hal_setchainmasks(sc->sc_ah, sc->sc_cur_txchainmask, 2508 sc->sc_cur_rxchainmask); 2509 2510 if (!ath_hal_reset(ah, sc->sc_opmode, ic->ic_curchan, AH_FALSE, &status)) { 2511 if_printf(ifp, "unable to reset hardware; hal status %u\n", 2512 status); 2513 ATH_UNLOCK(sc); 2514 return; 2515 } 2516 2517 ATH_RX_LOCK(sc); 2518 sc->sc_rx_stopped = 1; 2519 sc->sc_rx_resetted = 1; 2520 ATH_RX_UNLOCK(sc); 2521 2522 ath_chan_change(sc, ic->ic_curchan); 2523 2524 /* Let DFS at it in case it's a DFS channel */ 2525 ath_dfs_radar_enable(sc, ic->ic_curchan); 2526 2527 /* Let spectral at in case spectral is enabled */ 2528 ath_spectral_enable(sc, ic->ic_curchan); 2529 2530 /* 2531 * Let bluetooth coexistence at in case it's needed for this channel 2532 */ 2533 ath_btcoex_enable(sc, ic->ic_curchan); 2534 2535 /* 2536 * If we're doing TDMA, enforce the TXOP limitation for chips that 2537 * support it. 2538 */ 2539 if (sc->sc_hasenforcetxop && sc->sc_tdma) 2540 ath_hal_setenforcetxop(sc->sc_ah, 1); 2541 else 2542 ath_hal_setenforcetxop(sc->sc_ah, 0); 2543 2544 /* 2545 * Likewise this is set during reset so update 2546 * state cached in the driver. 2547 */ 2548 sc->sc_diversity = ath_hal_getdiversity(ah); 2549 sc->sc_lastlongcal = ticks; 2550 sc->sc_resetcal = 1; 2551 sc->sc_lastcalreset = 0; 2552 sc->sc_lastani = ticks; 2553 sc->sc_lastshortcal = ticks; 2554 sc->sc_doresetcal = AH_FALSE; 2555 /* 2556 * Beacon timers were cleared here; give ath_newstate() 2557 * a hint that the beacon timers should be poked when 2558 * things transition to the RUN state. 2559 */ 2560 sc->sc_beacons = 0; 2561 2562 /* 2563 * Setup the hardware after reset: the key cache 2564 * is filled as needed and the receive engine is 2565 * set going. Frame transmit is handled entirely 2566 * in the frame output path; there's nothing to do 2567 * here except setup the interrupt mask. 2568 */ 2569 if (ath_startrecv(sc) != 0) { 2570 if_printf(ifp, "unable to start recv logic\n"); 2571 ath_power_restore_power_state(sc); 2572 ATH_UNLOCK(sc); 2573 return; 2574 } 2575 2576 /* 2577 * Enable interrupts. 2578 */ 2579 sc->sc_imask = HAL_INT_RX | HAL_INT_TX 2580 | HAL_INT_RXORN | HAL_INT_TXURN 2581 | HAL_INT_FATAL | HAL_INT_GLOBAL; 2582 2583 /* 2584 * Enable RX EDMA bits. Note these overlap with 2585 * HAL_INT_RX and HAL_INT_RXDESC respectively. 2586 */ 2587 if (sc->sc_isedma) 2588 sc->sc_imask |= (HAL_INT_RXHP | HAL_INT_RXLP); 2589 2590 /* 2591 * If we're an EDMA NIC, we don't care about RXEOL. 2592 * Writing a new descriptor in will simply restart 2593 * RX DMA. 2594 */ 2595 if (! sc->sc_isedma) 2596 sc->sc_imask |= HAL_INT_RXEOL; 2597 2598 /* 2599 * Enable MIB interrupts when there are hardware phy counters. 2600 * Note we only do this (at the moment) for station mode. 2601 */ 2602 if (sc->sc_needmib && ic->ic_opmode == IEEE80211_M_STA) 2603 sc->sc_imask |= HAL_INT_MIB; 2604 2605 /* 2606 * XXX add capability for this. 2607 * 2608 * If we're in STA mode (and maybe IBSS?) then register for 2609 * TSFOOR interrupts. 2610 */ 2611 if (ic->ic_opmode == IEEE80211_M_STA) 2612 sc->sc_imask |= HAL_INT_TSFOOR; 2613 2614 /* Enable global TX timeout and carrier sense timeout if available */ 2615 if (ath_hal_gtxto_supported(ah)) 2616 sc->sc_imask |= HAL_INT_GTT; 2617 2618 DPRINTF(sc, ATH_DEBUG_RESET, "%s: imask=0x%x\n", 2619 __func__, sc->sc_imask); 2620 2621 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2622 callout_reset(&sc->sc_wd_ch, hz, ath_watchdog, sc); 2623 ath_hal_intrset(ah, sc->sc_imask); 2624 2625 ath_power_restore_power_state(sc); 2626 ATH_UNLOCK(sc); 2627 2628 #ifdef ATH_TX99_DIAG 2629 if (sc->sc_tx99 != NULL) 2630 sc->sc_tx99->start(sc->sc_tx99); 2631 else 2632 #endif 2633 ieee80211_start_all(ic); /* start all vap's */ 2634 } 2635 2636 static void 2637 ath_stop_locked(struct ifnet *ifp) 2638 { 2639 struct ath_softc *sc = ifp->if_softc; 2640 struct ath_hal *ah = sc->sc_ah; 2641 2642 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid %u if_flags 0x%x\n", 2643 __func__, sc->sc_invalid, ifp->if_flags); 2644 2645 ATH_LOCK_ASSERT(sc); 2646 2647 /* 2648 * Wake the hardware up before fiddling with it. 2649 */ 2650 ath_power_set_power_state(sc, HAL_PM_AWAKE); 2651 2652 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 2653 /* 2654 * Shutdown the hardware and driver: 2655 * reset 802.11 state machine 2656 * turn off timers 2657 * disable interrupts 2658 * turn off the radio 2659 * clear transmit machinery 2660 * clear receive machinery 2661 * drain and release tx queues 2662 * reclaim beacon resources 2663 * power down hardware 2664 * 2665 * Note that some of this work is not possible if the 2666 * hardware is gone (invalid). 2667 */ 2668 #ifdef ATH_TX99_DIAG 2669 if (sc->sc_tx99 != NULL) 2670 sc->sc_tx99->stop(sc->sc_tx99); 2671 #endif 2672 callout_stop(&sc->sc_wd_ch); 2673 sc->sc_wd_timer = 0; 2674 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 2675 if (!sc->sc_invalid) { 2676 if (sc->sc_softled) { 2677 callout_stop(&sc->sc_ledtimer); 2678 ath_hal_gpioset(ah, sc->sc_ledpin, 2679 !sc->sc_ledon); 2680 sc->sc_blinking = 0; 2681 } 2682 ath_hal_intrset(ah, 0); 2683 } 2684 /* XXX we should stop RX regardless of whether it's valid */ 2685 if (!sc->sc_invalid) { 2686 ath_stoprecv(sc, 1); 2687 ath_hal_phydisable(ah); 2688 } else 2689 sc->sc_rxlink = NULL; 2690 ath_draintxq(sc, ATH_RESET_DEFAULT); 2691 ath_beacon_free(sc); /* XXX not needed */ 2692 } 2693 2694 /* And now, restore the current power state */ 2695 ath_power_restore_power_state(sc); 2696 } 2697 2698 /* 2699 * Wait until all pending TX/RX has completed. 2700 * 2701 * This waits until all existing transmit, receive and interrupts 2702 * have completed. It's assumed that the caller has first 2703 * grabbed the reset lock so it doesn't try to do overlapping 2704 * chip resets. 2705 */ 2706 #define MAX_TXRX_ITERATIONS 100 2707 static void 2708 ath_txrx_stop_locked(struct ath_softc *sc) 2709 { 2710 int i = MAX_TXRX_ITERATIONS; 2711 2712 ATH_UNLOCK_ASSERT(sc); 2713 ATH_PCU_LOCK_ASSERT(sc); 2714 2715 /* 2716 * Sleep until all the pending operations have completed. 2717 * 2718 * The caller must ensure that reset has been incremented 2719 * or the pending operations may continue being queued. 2720 */ 2721 while (sc->sc_rxproc_cnt || sc->sc_txproc_cnt || 2722 sc->sc_txstart_cnt || sc->sc_intr_cnt) { 2723 if (i <= 0) 2724 break; 2725 msleep(sc, &sc->sc_pcu_mtx, 0, "ath_txrx_stop", 2726 msecs_to_ticks(10)); 2727 i--; 2728 } 2729 2730 if (i <= 0) 2731 device_printf(sc->sc_dev, 2732 "%s: didn't finish after %d iterations\n", 2733 __func__, MAX_TXRX_ITERATIONS); 2734 } 2735 #undef MAX_TXRX_ITERATIONS 2736 2737 #if 0 2738 static void 2739 ath_txrx_stop(struct ath_softc *sc) 2740 { 2741 ATH_UNLOCK_ASSERT(sc); 2742 ATH_PCU_UNLOCK_ASSERT(sc); 2743 2744 ATH_PCU_LOCK(sc); 2745 ath_txrx_stop_locked(sc); 2746 ATH_PCU_UNLOCK(sc); 2747 } 2748 #endif 2749 2750 static void 2751 ath_txrx_start(struct ath_softc *sc) 2752 { 2753 2754 taskqueue_unblock(sc->sc_tq); 2755 } 2756 2757 /* 2758 * Grab the reset lock, and wait around until noone else 2759 * is trying to do anything with it. 2760 * 2761 * This is totally horrible but we can't hold this lock for 2762 * long enough to do TX/RX or we end up with net80211/ip stack 2763 * LORs and eventual deadlock. 2764 * 2765 * "dowait" signals whether to spin, waiting for the reset 2766 * lock count to reach 0. This should (for now) only be used 2767 * during the reset path, as the rest of the code may not 2768 * be locking-reentrant enough to behave correctly. 2769 * 2770 * Another, cleaner way should be found to serialise all of 2771 * these operations. 2772 */ 2773 #define MAX_RESET_ITERATIONS 25 2774 static int 2775 ath_reset_grablock(struct ath_softc *sc, int dowait) 2776 { 2777 int w = 0; 2778 int i = MAX_RESET_ITERATIONS; 2779 2780 ATH_PCU_LOCK_ASSERT(sc); 2781 do { 2782 if (sc->sc_inreset_cnt == 0) { 2783 w = 1; 2784 break; 2785 } 2786 if (dowait == 0) { 2787 w = 0; 2788 break; 2789 } 2790 ATH_PCU_UNLOCK(sc); 2791 /* 2792 * 1 tick is likely not enough time for long calibrations 2793 * to complete. So we should wait quite a while. 2794 */ 2795 pause("ath_reset_grablock", msecs_to_ticks(100)); 2796 i--; 2797 ATH_PCU_LOCK(sc); 2798 } while (i > 0); 2799 2800 /* 2801 * We always increment the refcounter, regardless 2802 * of whether we succeeded to get it in an exclusive 2803 * way. 2804 */ 2805 sc->sc_inreset_cnt++; 2806 2807 if (i <= 0) 2808 device_printf(sc->sc_dev, 2809 "%s: didn't finish after %d iterations\n", 2810 __func__, MAX_RESET_ITERATIONS); 2811 2812 if (w == 0) 2813 device_printf(sc->sc_dev, 2814 "%s: warning, recursive reset path!\n", 2815 __func__); 2816 2817 return w; 2818 } 2819 #undef MAX_RESET_ITERATIONS 2820 2821 /* 2822 * XXX TODO: write ath_reset_releaselock 2823 */ 2824 2825 static void 2826 ath_stop(struct ifnet *ifp) 2827 { 2828 struct ath_softc *sc = ifp->if_softc; 2829 2830 ATH_LOCK(sc); 2831 ath_stop_locked(ifp); 2832 ATH_UNLOCK(sc); 2833 } 2834 2835 /* 2836 * Reset the hardware w/o losing operational state. This is 2837 * basically a more efficient way of doing ath_stop, ath_init, 2838 * followed by state transitions to the current 802.11 2839 * operational state. Used to recover from various errors and 2840 * to reset or reload hardware state. 2841 */ 2842 int 2843 ath_reset(struct ifnet *ifp, ATH_RESET_TYPE reset_type) 2844 { 2845 struct ath_softc *sc = ifp->if_softc; 2846 struct ieee80211com *ic = ifp->if_l2com; 2847 struct ath_hal *ah = sc->sc_ah; 2848 HAL_STATUS status; 2849 int i; 2850 2851 DPRINTF(sc, ATH_DEBUG_RESET, "%s: called\n", __func__); 2852 2853 /* Ensure ATH_LOCK isn't held; ath_rx_proc can't be locked */ 2854 ATH_PCU_UNLOCK_ASSERT(sc); 2855 ATH_UNLOCK_ASSERT(sc); 2856 2857 /* Try to (stop any further TX/RX from occuring */ 2858 taskqueue_block(sc->sc_tq); 2859 2860 /* 2861 * Wake the hardware up. 2862 */ 2863 ATH_LOCK(sc); 2864 ath_power_set_power_state(sc, HAL_PM_AWAKE); 2865 ATH_UNLOCK(sc); 2866 2867 ATH_PCU_LOCK(sc); 2868 2869 /* 2870 * Grab the reset lock before TX/RX is stopped. 2871 * 2872 * This is needed to ensure that when the TX/RX actually does finish, 2873 * no further TX/RX/reset runs in parallel with this. 2874 */ 2875 if (ath_reset_grablock(sc, 1) == 0) { 2876 device_printf(sc->sc_dev, "%s: concurrent reset! Danger!\n", 2877 __func__); 2878 } 2879 2880 /* disable interrupts */ 2881 ath_hal_intrset(ah, 0); 2882 2883 /* 2884 * Now, ensure that any in progress TX/RX completes before we 2885 * continue. 2886 */ 2887 ath_txrx_stop_locked(sc); 2888 2889 ATH_PCU_UNLOCK(sc); 2890 2891 /* 2892 * Regardless of whether we're doing a no-loss flush or 2893 * not, stop the PCU and handle what's in the RX queue. 2894 * That way frames aren't dropped which shouldn't be. 2895 */ 2896 ath_stoprecv(sc, (reset_type != ATH_RESET_NOLOSS)); 2897 ath_rx_flush(sc); 2898 2899 /* 2900 * Should now wait for pending TX/RX to complete 2901 * and block future ones from occuring. This needs to be 2902 * done before the TX queue is drained. 2903 */ 2904 ath_draintxq(sc, reset_type); /* stop xmit side */ 2905 2906 ath_settkipmic(sc); /* configure TKIP MIC handling */ 2907 /* NB: indicate channel change so we do a full reset */ 2908 ath_update_chainmasks(sc, ic->ic_curchan); 2909 ath_hal_setchainmasks(sc->sc_ah, sc->sc_cur_txchainmask, 2910 sc->sc_cur_rxchainmask); 2911 if (!ath_hal_reset(ah, sc->sc_opmode, ic->ic_curchan, AH_TRUE, &status)) 2912 if_printf(ifp, "%s: unable to reset hardware; hal status %u\n", 2913 __func__, status); 2914 sc->sc_diversity = ath_hal_getdiversity(ah); 2915 2916 ATH_RX_LOCK(sc); 2917 sc->sc_rx_stopped = 1; 2918 sc->sc_rx_resetted = 1; 2919 ATH_RX_UNLOCK(sc); 2920 2921 /* Let DFS at it in case it's a DFS channel */ 2922 ath_dfs_radar_enable(sc, ic->ic_curchan); 2923 2924 /* Let spectral at in case spectral is enabled */ 2925 ath_spectral_enable(sc, ic->ic_curchan); 2926 2927 /* 2928 * Let bluetooth coexistence at in case it's needed for this channel 2929 */ 2930 ath_btcoex_enable(sc, ic->ic_curchan); 2931 2932 /* 2933 * If we're doing TDMA, enforce the TXOP limitation for chips that 2934 * support it. 2935 */ 2936 if (sc->sc_hasenforcetxop && sc->sc_tdma) 2937 ath_hal_setenforcetxop(sc->sc_ah, 1); 2938 else 2939 ath_hal_setenforcetxop(sc->sc_ah, 0); 2940 2941 if (ath_startrecv(sc) != 0) /* restart recv */ 2942 if_printf(ifp, "%s: unable to start recv logic\n", __func__); 2943 /* 2944 * We may be doing a reset in response to an ioctl 2945 * that changes the channel so update any state that 2946 * might change as a result. 2947 */ 2948 ath_chan_change(sc, ic->ic_curchan); 2949 if (sc->sc_beacons) { /* restart beacons */ 2950 #ifdef IEEE80211_SUPPORT_TDMA 2951 if (sc->sc_tdma) 2952 ath_tdma_config(sc, NULL); 2953 else 2954 #endif 2955 ath_beacon_config(sc, NULL); 2956 } 2957 2958 /* 2959 * Release the reset lock and re-enable interrupts here. 2960 * If an interrupt was being processed in ath_intr(), 2961 * it would disable interrupts at this point. So we have 2962 * to atomically enable interrupts and decrement the 2963 * reset counter - this way ath_intr() doesn't end up 2964 * disabling interrupts without a corresponding enable 2965 * in the rest or channel change path. 2966 * 2967 * Grab the TX reference in case we need to transmit. 2968 * That way a parallel transmit doesn't. 2969 */ 2970 ATH_PCU_LOCK(sc); 2971 sc->sc_inreset_cnt--; 2972 sc->sc_txstart_cnt++; 2973 /* XXX only do this if sc_inreset_cnt == 0? */ 2974 ath_hal_intrset(ah, sc->sc_imask); 2975 ATH_PCU_UNLOCK(sc); 2976 2977 /* 2978 * TX and RX can be started here. If it were started with 2979 * sc_inreset_cnt > 0, the TX and RX path would abort. 2980 * Thus if this is a nested call through the reset or 2981 * channel change code, TX completion will occur but 2982 * RX completion and ath_start / ath_tx_start will not 2983 * run. 2984 */ 2985 2986 /* Restart TX/RX as needed */ 2987 ath_txrx_start(sc); 2988 2989 /* XXX TODO: we need to hold the tx refcount here! */ 2990 2991 /* Restart TX completion and pending TX */ 2992 if (reset_type == ATH_RESET_NOLOSS) { 2993 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { 2994 if (ATH_TXQ_SETUP(sc, i)) { 2995 ATH_TXQ_LOCK(&sc->sc_txq[i]); 2996 ath_txq_restart_dma(sc, &sc->sc_txq[i]); 2997 ATH_TXQ_UNLOCK(&sc->sc_txq[i]); 2998 2999 ATH_TX_LOCK(sc); 3000 ath_txq_sched(sc, &sc->sc_txq[i]); 3001 ATH_TX_UNLOCK(sc); 3002 } 3003 } 3004 } 3005 3006 /* 3007 * This may have been set during an ath_start() call which 3008 * set this once it detected a concurrent TX was going on. 3009 * So, clear it. 3010 */ 3011 IF_LOCK(&ifp->if_snd); 3012 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 3013 IF_UNLOCK(&ifp->if_snd); 3014 3015 ATH_LOCK(sc); 3016 ath_power_restore_power_state(sc); 3017 ATH_UNLOCK(sc); 3018 3019 ATH_PCU_LOCK(sc); 3020 sc->sc_txstart_cnt--; 3021 ATH_PCU_UNLOCK(sc); 3022 3023 /* Handle any frames in the TX queue */ 3024 /* 3025 * XXX should this be done by the caller, rather than 3026 * ath_reset() ? 3027 */ 3028 ath_tx_kick(sc); /* restart xmit */ 3029 return 0; 3030 } 3031 3032 static int 3033 ath_reset_vap(struct ieee80211vap *vap, u_long cmd) 3034 { 3035 struct ieee80211com *ic = vap->iv_ic; 3036 struct ifnet *ifp = ic->ic_ifp; 3037 struct ath_softc *sc = ifp->if_softc; 3038 struct ath_hal *ah = sc->sc_ah; 3039 3040 switch (cmd) { 3041 case IEEE80211_IOC_TXPOWER: 3042 /* 3043 * If per-packet TPC is enabled, then we have nothing 3044 * to do; otherwise we need to force the global limit. 3045 * All this can happen directly; no need to reset. 3046 */ 3047 if (!ath_hal_gettpc(ah)) 3048 ath_hal_settxpowlimit(ah, ic->ic_txpowlimit); 3049 return 0; 3050 } 3051 /* XXX? Full or NOLOSS? */ 3052 return ath_reset(ifp, ATH_RESET_FULL); 3053 } 3054 3055 struct ath_buf * 3056 _ath_getbuf_locked(struct ath_softc *sc, ath_buf_type_t btype) 3057 { 3058 struct ath_buf *bf; 3059 3060 ATH_TXBUF_LOCK_ASSERT(sc); 3061 3062 if (btype == ATH_BUFTYPE_MGMT) 3063 bf = TAILQ_FIRST(&sc->sc_txbuf_mgmt); 3064 else 3065 bf = TAILQ_FIRST(&sc->sc_txbuf); 3066 3067 if (bf == NULL) { 3068 sc->sc_stats.ast_tx_getnobuf++; 3069 } else { 3070 if (bf->bf_flags & ATH_BUF_BUSY) { 3071 sc->sc_stats.ast_tx_getbusybuf++; 3072 bf = NULL; 3073 } 3074 } 3075 3076 if (bf != NULL && (bf->bf_flags & ATH_BUF_BUSY) == 0) { 3077 if (btype == ATH_BUFTYPE_MGMT) 3078 TAILQ_REMOVE(&sc->sc_txbuf_mgmt, bf, bf_list); 3079 else { 3080 TAILQ_REMOVE(&sc->sc_txbuf, bf, bf_list); 3081 sc->sc_txbuf_cnt--; 3082 3083 /* 3084 * This shuldn't happen; however just to be 3085 * safe print a warning and fudge the txbuf 3086 * count. 3087 */ 3088 if (sc->sc_txbuf_cnt < 0) { 3089 device_printf(sc->sc_dev, 3090 "%s: sc_txbuf_cnt < 0?\n", 3091 __func__); 3092 sc->sc_txbuf_cnt = 0; 3093 } 3094 } 3095 } else 3096 bf = NULL; 3097 3098 if (bf == NULL) { 3099 /* XXX should check which list, mgmt or otherwise */ 3100 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: %s\n", __func__, 3101 TAILQ_FIRST(&sc->sc_txbuf) == NULL ? 3102 "out of xmit buffers" : "xmit buffer busy"); 3103 return NULL; 3104 } 3105 3106 /* XXX TODO: should do this at buffer list initialisation */ 3107 /* XXX (then, ensure the buffer has the right flag set) */ 3108 bf->bf_flags = 0; 3109 if (btype == ATH_BUFTYPE_MGMT) 3110 bf->bf_flags |= ATH_BUF_MGMT; 3111 else 3112 bf->bf_flags &= (~ATH_BUF_MGMT); 3113 3114 /* Valid bf here; clear some basic fields */ 3115 bf->bf_next = NULL; /* XXX just to be sure */ 3116 bf->bf_last = NULL; /* XXX again, just to be sure */ 3117 bf->bf_comp = NULL; /* XXX again, just to be sure */ 3118 bzero(&bf->bf_state, sizeof(bf->bf_state)); 3119 3120 /* 3121 * Track the descriptor ID only if doing EDMA 3122 */ 3123 if (sc->sc_isedma) { 3124 bf->bf_descid = sc->sc_txbuf_descid; 3125 sc->sc_txbuf_descid++; 3126 } 3127 3128 return bf; 3129 } 3130 3131 /* 3132 * When retrying a software frame, buffers marked ATH_BUF_BUSY 3133 * can't be thrown back on the queue as they could still be 3134 * in use by the hardware. 3135 * 3136 * This duplicates the buffer, or returns NULL. 3137 * 3138 * The descriptor is also copied but the link pointers and 3139 * the DMA segments aren't copied; this frame should thus 3140 * be again passed through the descriptor setup/chain routines 3141 * so the link is correct. 3142 * 3143 * The caller must free the buffer using ath_freebuf(). 3144 */ 3145 struct ath_buf * 3146 ath_buf_clone(struct ath_softc *sc, struct ath_buf *bf) 3147 { 3148 struct ath_buf *tbf; 3149 3150 tbf = ath_getbuf(sc, 3151 (bf->bf_flags & ATH_BUF_MGMT) ? 3152 ATH_BUFTYPE_MGMT : ATH_BUFTYPE_NORMAL); 3153 if (tbf == NULL) 3154 return NULL; /* XXX failure? Why? */ 3155 3156 /* Copy basics */ 3157 tbf->bf_next = NULL; 3158 tbf->bf_nseg = bf->bf_nseg; 3159 tbf->bf_flags = bf->bf_flags & ATH_BUF_FLAGS_CLONE; 3160 tbf->bf_status = bf->bf_status; 3161 tbf->bf_m = bf->bf_m; 3162 tbf->bf_node = bf->bf_node; 3163 KASSERT((bf->bf_node != NULL), ("%s: bf_node=NULL!", __func__)); 3164 /* will be setup by the chain/setup function */ 3165 tbf->bf_lastds = NULL; 3166 /* for now, last == self */ 3167 tbf->bf_last = tbf; 3168 tbf->bf_comp = bf->bf_comp; 3169 3170 /* NOTE: DMA segments will be setup by the setup/chain functions */ 3171 3172 /* The caller has to re-init the descriptor + links */ 3173 3174 /* 3175 * Free the DMA mapping here, before we NULL the mbuf. 3176 * We must only call bus_dmamap_unload() once per mbuf chain 3177 * or behaviour is undefined. 3178 */ 3179 if (bf->bf_m != NULL) { 3180 /* 3181 * XXX is this POSTWRITE call required? 3182 */ 3183 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3184 BUS_DMASYNC_POSTWRITE); 3185 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 3186 } 3187 3188 bf->bf_m = NULL; 3189 bf->bf_node = NULL; 3190 3191 /* Copy state */ 3192 memcpy(&tbf->bf_state, &bf->bf_state, sizeof(bf->bf_state)); 3193 3194 return tbf; 3195 } 3196 3197 struct ath_buf * 3198 ath_getbuf(struct ath_softc *sc, ath_buf_type_t btype) 3199 { 3200 struct ath_buf *bf; 3201 3202 ATH_TXBUF_LOCK(sc); 3203 bf = _ath_getbuf_locked(sc, btype); 3204 /* 3205 * If a mgmt buffer was requested but we're out of those, 3206 * try requesting a normal one. 3207 */ 3208 if (bf == NULL && btype == ATH_BUFTYPE_MGMT) 3209 bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL); 3210 ATH_TXBUF_UNLOCK(sc); 3211 if (bf == NULL) { 3212 struct ifnet *ifp = sc->sc_ifp; 3213 3214 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: stop queue\n", __func__); 3215 sc->sc_stats.ast_tx_qstop++; 3216 IF_LOCK(&ifp->if_snd); 3217 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 3218 IF_UNLOCK(&ifp->if_snd); 3219 } 3220 return bf; 3221 } 3222 3223 static void 3224 ath_qflush(struct ifnet *ifp) 3225 { 3226 3227 /* XXX TODO */ 3228 } 3229 3230 /* 3231 * Transmit a single frame. 3232 * 3233 * net80211 will free the node reference if the transmit 3234 * fails, so don't free the node reference here. 3235 */ 3236 static int 3237 ath_transmit(struct ifnet *ifp, struct mbuf *m) 3238 { 3239 struct ieee80211com *ic = ifp->if_l2com; 3240 struct ath_softc *sc = ic->ic_ifp->if_softc; 3241 struct ieee80211_node *ni; 3242 struct mbuf *next; 3243 struct ath_buf *bf; 3244 ath_bufhead frags; 3245 int retval = 0; 3246 3247 /* 3248 * Tell the reset path that we're currently transmitting. 3249 */ 3250 ATH_PCU_LOCK(sc); 3251 if (sc->sc_inreset_cnt > 0) { 3252 DPRINTF(sc, ATH_DEBUG_XMIT, 3253 "%s: sc_inreset_cnt > 0; bailing\n", __func__); 3254 ATH_PCU_UNLOCK(sc); 3255 IF_LOCK(&ifp->if_snd); 3256 sc->sc_stats.ast_tx_qstop++; 3257 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 3258 IF_UNLOCK(&ifp->if_snd); 3259 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_start_task: OACTIVE, finish"); 3260 return (ENOBUFS); /* XXX should be EINVAL or? */ 3261 } 3262 sc->sc_txstart_cnt++; 3263 ATH_PCU_UNLOCK(sc); 3264 3265 /* Wake the hardware up already */ 3266 ATH_LOCK(sc); 3267 ath_power_set_power_state(sc, HAL_PM_AWAKE); 3268 ATH_UNLOCK(sc); 3269 3270 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_transmit: start"); 3271 /* 3272 * Grab the TX lock - it's ok to do this here; we haven't 3273 * yet started transmitting. 3274 */ 3275 ATH_TX_LOCK(sc); 3276 3277 /* 3278 * Node reference, if there's one. 3279 */ 3280 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 3281 3282 /* 3283 * Enforce how deep a node queue can get. 3284 * 3285 * XXX it would be nicer if we kept an mbuf queue per 3286 * node and only whacked them into ath_bufs when we 3287 * are ready to schedule some traffic from them. 3288 * .. that may come later. 3289 * 3290 * XXX we should also track the per-node hardware queue 3291 * depth so it is easy to limit the _SUM_ of the swq and 3292 * hwq frames. Since we only schedule two HWQ frames 3293 * at a time, this should be OK for now. 3294 */ 3295 if ((!(m->m_flags & M_EAPOL)) && 3296 (ATH_NODE(ni)->an_swq_depth > sc->sc_txq_node_maxdepth)) { 3297 sc->sc_stats.ast_tx_nodeq_overflow++; 3298 m_freem(m); 3299 m = NULL; 3300 retval = ENOBUFS; 3301 goto finish; 3302 } 3303 3304 /* 3305 * Check how many TX buffers are available. 3306 * 3307 * If this is for non-EAPOL traffic, just leave some 3308 * space free in order for buffer cloning and raw 3309 * frame transmission to occur. 3310 * 3311 * If it's for EAPOL traffic, ignore this for now. 3312 * Management traffic will be sent via the raw transmit 3313 * method which bypasses this check. 3314 * 3315 * This is needed to ensure that EAPOL frames during 3316 * (re) keying have a chance to go out. 3317 * 3318 * See kern/138379 for more information. 3319 */ 3320 if ((!(m->m_flags & M_EAPOL)) && 3321 (sc->sc_txbuf_cnt <= sc->sc_txq_data_minfree)) { 3322 sc->sc_stats.ast_tx_nobuf++; 3323 m_freem(m); 3324 m = NULL; 3325 retval = ENOBUFS; 3326 goto finish; 3327 } 3328 3329 /* 3330 * Grab a TX buffer and associated resources. 3331 * 3332 * If it's an EAPOL frame, allocate a MGMT ath_buf. 3333 * That way even with temporary buffer exhaustion due to 3334 * the data path doesn't leave us without the ability 3335 * to transmit management frames. 3336 * 3337 * Otherwise allocate a normal buffer. 3338 */ 3339 if (m->m_flags & M_EAPOL) 3340 bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 3341 else 3342 bf = ath_getbuf(sc, ATH_BUFTYPE_NORMAL); 3343 3344 if (bf == NULL) { 3345 /* 3346 * If we failed to allocate a buffer, fail. 3347 * 3348 * We shouldn't fail normally, due to the check 3349 * above. 3350 */ 3351 sc->sc_stats.ast_tx_nobuf++; 3352 IF_LOCK(&ifp->if_snd); 3353 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 3354 IF_UNLOCK(&ifp->if_snd); 3355 m_freem(m); 3356 m = NULL; 3357 retval = ENOBUFS; 3358 goto finish; 3359 } 3360 3361 /* 3362 * At this point we have a buffer; so we need to free it 3363 * if we hit any error conditions. 3364 */ 3365 3366 /* 3367 * Check for fragmentation. If this frame 3368 * has been broken up verify we have enough 3369 * buffers to send all the fragments so all 3370 * go out or none... 3371 */ 3372 TAILQ_INIT(&frags); 3373 if ((m->m_flags & M_FRAG) && 3374 !ath_txfrag_setup(sc, &frags, m, ni)) { 3375 DPRINTF(sc, ATH_DEBUG_XMIT, 3376 "%s: out of txfrag buffers\n", __func__); 3377 sc->sc_stats.ast_tx_nofrag++; 3378 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 3379 ath_freetx(m); 3380 goto bad; 3381 } 3382 3383 /* 3384 * At this point if we have any TX fragments, then we will 3385 * have bumped the node reference once for each of those. 3386 */ 3387 3388 /* 3389 * XXX Is there anything actually _enforcing_ that the 3390 * fragments are being transmitted in one hit, rather than 3391 * being interleaved with other transmissions on that 3392 * hardware queue? 3393 * 3394 * The ATH TX output lock is the only thing serialising this 3395 * right now. 3396 */ 3397 3398 /* 3399 * Calculate the "next fragment" length field in ath_buf 3400 * in order to let the transmit path know enough about 3401 * what to next write to the hardware. 3402 */ 3403 if (m->m_flags & M_FRAG) { 3404 struct ath_buf *fbf = bf; 3405 struct ath_buf *n_fbf = NULL; 3406 struct mbuf *fm = m->m_nextpkt; 3407 3408 /* 3409 * We need to walk the list of fragments and set 3410 * the next size to the following buffer. 3411 * However, the first buffer isn't in the frag 3412 * list, so we have to do some gymnastics here. 3413 */ 3414 TAILQ_FOREACH(n_fbf, &frags, bf_list) { 3415 fbf->bf_nextfraglen = fm->m_pkthdr.len; 3416 fbf = n_fbf; 3417 fm = fm->m_nextpkt; 3418 } 3419 } 3420 3421 /* 3422 * Bump the ifp output counter. 3423 * 3424 * XXX should use atomics? 3425 */ 3426 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 3427 nextfrag: 3428 /* 3429 * Pass the frame to the h/w for transmission. 3430 * Fragmented frames have each frag chained together 3431 * with m_nextpkt. We know there are sufficient ath_buf's 3432 * to send all the frags because of work done by 3433 * ath_txfrag_setup. We leave m_nextpkt set while 3434 * calling ath_tx_start so it can use it to extend the 3435 * the tx duration to cover the subsequent frag and 3436 * so it can reclaim all the mbufs in case of an error; 3437 * ath_tx_start clears m_nextpkt once it commits to 3438 * handing the frame to the hardware. 3439 * 3440 * Note: if this fails, then the mbufs are freed but 3441 * not the node reference. 3442 */ 3443 next = m->m_nextpkt; 3444 if (ath_tx_start(sc, ni, bf, m)) { 3445 bad: 3446 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 3447 reclaim: 3448 bf->bf_m = NULL; 3449 bf->bf_node = NULL; 3450 ATH_TXBUF_LOCK(sc); 3451 ath_returnbuf_head(sc, bf); 3452 /* 3453 * Free the rest of the node references and 3454 * buffers for the fragment list. 3455 */ 3456 ath_txfrag_cleanup(sc, &frags, ni); 3457 ATH_TXBUF_UNLOCK(sc); 3458 retval = ENOBUFS; 3459 goto finish; 3460 } 3461 3462 /* 3463 * Check here if the node is in power save state. 3464 */ 3465 ath_tx_update_tim(sc, ni, 1); 3466 3467 if (next != NULL) { 3468 /* 3469 * Beware of state changing between frags. 3470 * XXX check sta power-save state? 3471 */ 3472 if (ni->ni_vap->iv_state != IEEE80211_S_RUN) { 3473 DPRINTF(sc, ATH_DEBUG_XMIT, 3474 "%s: flush fragmented packet, state %s\n", 3475 __func__, 3476 ieee80211_state_name[ni->ni_vap->iv_state]); 3477 /* XXX dmamap */ 3478 ath_freetx(next); 3479 goto reclaim; 3480 } 3481 m = next; 3482 bf = TAILQ_FIRST(&frags); 3483 KASSERT(bf != NULL, ("no buf for txfrag")); 3484 TAILQ_REMOVE(&frags, bf, bf_list); 3485 goto nextfrag; 3486 } 3487 3488 /* 3489 * Bump watchdog timer. 3490 */ 3491 sc->sc_wd_timer = 5; 3492 3493 finish: 3494 ATH_TX_UNLOCK(sc); 3495 3496 /* 3497 * Finished transmitting! 3498 */ 3499 ATH_PCU_LOCK(sc); 3500 sc->sc_txstart_cnt--; 3501 ATH_PCU_UNLOCK(sc); 3502 3503 /* Sleep the hardware if required */ 3504 ATH_LOCK(sc); 3505 ath_power_restore_power_state(sc); 3506 ATH_UNLOCK(sc); 3507 3508 ATH_KTR(sc, ATH_KTR_TX, 0, "ath_transmit: finished"); 3509 3510 return (retval); 3511 } 3512 3513 static int 3514 ath_media_change(struct ifnet *ifp) 3515 { 3516 int error = ieee80211_media_change(ifp); 3517 /* NB: only the fixed rate can change and that doesn't need a reset */ 3518 return (error == ENETRESET ? 0 : error); 3519 } 3520 3521 /* 3522 * Block/unblock tx+rx processing while a key change is done. 3523 * We assume the caller serializes key management operations 3524 * so we only need to worry about synchronization with other 3525 * uses that originate in the driver. 3526 */ 3527 static void 3528 ath_key_update_begin(struct ieee80211vap *vap) 3529 { 3530 struct ifnet *ifp = vap->iv_ic->ic_ifp; 3531 struct ath_softc *sc = ifp->if_softc; 3532 3533 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 3534 taskqueue_block(sc->sc_tq); 3535 } 3536 3537 static void 3538 ath_key_update_end(struct ieee80211vap *vap) 3539 { 3540 struct ifnet *ifp = vap->iv_ic->ic_ifp; 3541 struct ath_softc *sc = ifp->if_softc; 3542 3543 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 3544 taskqueue_unblock(sc->sc_tq); 3545 } 3546 3547 static void 3548 ath_update_promisc(struct ifnet *ifp) 3549 { 3550 struct ath_softc *sc = ifp->if_softc; 3551 u_int32_t rfilt; 3552 3553 /* configure rx filter */ 3554 ATH_LOCK(sc); 3555 ath_power_set_power_state(sc, HAL_PM_AWAKE); 3556 rfilt = ath_calcrxfilter(sc); 3557 ath_hal_setrxfilter(sc->sc_ah, rfilt); 3558 ath_power_restore_power_state(sc); 3559 ATH_UNLOCK(sc); 3560 3561 DPRINTF(sc, ATH_DEBUG_MODE, "%s: RX filter 0x%x\n", __func__, rfilt); 3562 } 3563 3564 /* 3565 * Driver-internal mcast update call. 3566 * 3567 * Assumes the hardware is already awake. 3568 */ 3569 static void 3570 ath_update_mcast_hw(struct ath_softc *sc) 3571 { 3572 struct ifnet *ifp = sc->sc_ifp; 3573 u_int32_t mfilt[2]; 3574 3575 /* calculate and install multicast filter */ 3576 if ((ifp->if_flags & IFF_ALLMULTI) == 0) { 3577 struct ifmultiaddr *ifma; 3578 /* 3579 * Merge multicast addresses to form the hardware filter. 3580 */ 3581 mfilt[0] = mfilt[1] = 0; 3582 if_maddr_rlock(ifp); /* XXX need some fiddling to remove? */ 3583 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 3584 caddr_t dl; 3585 u_int32_t val; 3586 u_int8_t pos; 3587 3588 /* calculate XOR of eight 6bit values */ 3589 dl = LLADDR((struct sockaddr_dl *) ifma->ifma_addr); 3590 val = LE_READ_4(dl + 0); 3591 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 3592 val = LE_READ_4(dl + 3); 3593 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 3594 pos &= 0x3f; 3595 mfilt[pos / 32] |= (1 << (pos % 32)); 3596 } 3597 if_maddr_runlock(ifp); 3598 } else 3599 mfilt[0] = mfilt[1] = ~0; 3600 3601 ath_hal_setmcastfilter(sc->sc_ah, mfilt[0], mfilt[1]); 3602 3603 DPRINTF(sc, ATH_DEBUG_MODE, "%s: MC filter %08x:%08x\n", 3604 __func__, mfilt[0], mfilt[1]); 3605 } 3606 3607 /* 3608 * Called from the net80211 layer - force the hardware 3609 * awake before operating. 3610 */ 3611 static void 3612 ath_update_mcast(struct ifnet *ifp) 3613 { 3614 struct ath_softc *sc = ifp->if_softc; 3615 3616 ATH_LOCK(sc); 3617 ath_power_set_power_state(sc, HAL_PM_AWAKE); 3618 ATH_UNLOCK(sc); 3619 3620 ath_update_mcast_hw(sc); 3621 3622 ATH_LOCK(sc); 3623 ath_power_restore_power_state(sc); 3624 ATH_UNLOCK(sc); 3625 } 3626 3627 void 3628 ath_mode_init(struct ath_softc *sc) 3629 { 3630 struct ifnet *ifp = sc->sc_ifp; 3631 struct ath_hal *ah = sc->sc_ah; 3632 u_int32_t rfilt; 3633 3634 /* configure rx filter */ 3635 rfilt = ath_calcrxfilter(sc); 3636 ath_hal_setrxfilter(ah, rfilt); 3637 3638 /* configure operational mode */ 3639 ath_hal_setopmode(ah); 3640 3641 DPRINTF(sc, ATH_DEBUG_STATE | ATH_DEBUG_MODE, 3642 "%s: ah=%p, ifp=%p, if_addr=%p\n", 3643 __func__, 3644 ah, 3645 ifp, 3646 (ifp == NULL) ? NULL : ifp->if_addr); 3647 3648 /* handle any link-level address change */ 3649 ath_hal_setmac(ah, IF_LLADDR(ifp)); 3650 3651 /* calculate and install multicast filter */ 3652 ath_update_mcast_hw(sc); 3653 } 3654 3655 /* 3656 * Set the slot time based on the current setting. 3657 */ 3658 void 3659 ath_setslottime(struct ath_softc *sc) 3660 { 3661 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 3662 struct ath_hal *ah = sc->sc_ah; 3663 u_int usec; 3664 3665 if (IEEE80211_IS_CHAN_HALF(ic->ic_curchan)) 3666 usec = 13; 3667 else if (IEEE80211_IS_CHAN_QUARTER(ic->ic_curchan)) 3668 usec = 21; 3669 else if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan)) { 3670 /* honor short/long slot time only in 11g */ 3671 /* XXX shouldn't honor on pure g or turbo g channel */ 3672 if (ic->ic_flags & IEEE80211_F_SHSLOT) 3673 usec = HAL_SLOT_TIME_9; 3674 else 3675 usec = HAL_SLOT_TIME_20; 3676 } else 3677 usec = HAL_SLOT_TIME_9; 3678 3679 DPRINTF(sc, ATH_DEBUG_RESET, 3680 "%s: chan %u MHz flags 0x%x %s slot, %u usec\n", 3681 __func__, ic->ic_curchan->ic_freq, ic->ic_curchan->ic_flags, 3682 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", usec); 3683 3684 /* Wake up the hardware first before updating the slot time */ 3685 ATH_LOCK(sc); 3686 ath_power_set_power_state(sc, HAL_PM_AWAKE); 3687 ath_hal_setslottime(ah, usec); 3688 ath_power_restore_power_state(sc); 3689 sc->sc_updateslot = OK; 3690 ATH_UNLOCK(sc); 3691 } 3692 3693 /* 3694 * Callback from the 802.11 layer to update the 3695 * slot time based on the current setting. 3696 */ 3697 static void 3698 ath_updateslot(struct ifnet *ifp) 3699 { 3700 struct ath_softc *sc = ifp->if_softc; 3701 struct ieee80211com *ic = ifp->if_l2com; 3702 3703 /* 3704 * When not coordinating the BSS, change the hardware 3705 * immediately. For other operation we defer the change 3706 * until beacon updates have propagated to the stations. 3707 * 3708 * XXX sc_updateslot isn't changed behind a lock? 3709 */ 3710 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 3711 ic->ic_opmode == IEEE80211_M_MBSS) 3712 sc->sc_updateslot = UPDATE; 3713 else 3714 ath_setslottime(sc); 3715 } 3716 3717 /* 3718 * Append the contents of src to dst; both queues 3719 * are assumed to be locked. 3720 */ 3721 void 3722 ath_txqmove(struct ath_txq *dst, struct ath_txq *src) 3723 { 3724 3725 ATH_TXQ_LOCK_ASSERT(src); 3726 ATH_TXQ_LOCK_ASSERT(dst); 3727 3728 TAILQ_CONCAT(&dst->axq_q, &src->axq_q, bf_list); 3729 dst->axq_link = src->axq_link; 3730 src->axq_link = NULL; 3731 dst->axq_depth += src->axq_depth; 3732 dst->axq_aggr_depth += src->axq_aggr_depth; 3733 src->axq_depth = 0; 3734 src->axq_aggr_depth = 0; 3735 } 3736 3737 /* 3738 * Reset the hardware, with no loss. 3739 * 3740 * This can't be used for a general case reset. 3741 */ 3742 static void 3743 ath_reset_proc(void *arg, int pending) 3744 { 3745 struct ath_softc *sc = arg; 3746 struct ifnet *ifp = sc->sc_ifp; 3747 3748 #if 0 3749 if_printf(ifp, "%s: resetting\n", __func__); 3750 #endif 3751 ath_reset(ifp, ATH_RESET_NOLOSS); 3752 } 3753 3754 /* 3755 * Reset the hardware after detecting beacons have stopped. 3756 */ 3757 static void 3758 ath_bstuck_proc(void *arg, int pending) 3759 { 3760 struct ath_softc *sc = arg; 3761 struct ifnet *ifp = sc->sc_ifp; 3762 uint32_t hangs = 0; 3763 3764 if (ath_hal_gethangstate(sc->sc_ah, 0xff, &hangs) && hangs != 0) 3765 if_printf(ifp, "bb hang detected (0x%x)\n", hangs); 3766 3767 #ifdef ATH_DEBUG_ALQ 3768 if (if_ath_alq_checkdebug(&sc->sc_alq, ATH_ALQ_STUCK_BEACON)) 3769 if_ath_alq_post(&sc->sc_alq, ATH_ALQ_STUCK_BEACON, 0, NULL); 3770 #endif 3771 3772 if_printf(ifp, "stuck beacon; resetting (bmiss count %u)\n", 3773 sc->sc_bmisscount); 3774 sc->sc_stats.ast_bstuck++; 3775 /* 3776 * This assumes that there's no simultaneous channel mode change 3777 * occuring. 3778 */ 3779 ath_reset(ifp, ATH_RESET_NOLOSS); 3780 } 3781 3782 static void 3783 ath_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 3784 { 3785 bus_addr_t *paddr = (bus_addr_t*) arg; 3786 KASSERT(error == 0, ("error %u on bus_dma callback", error)); 3787 *paddr = segs->ds_addr; 3788 } 3789 3790 /* 3791 * Allocate the descriptors and appropriate DMA tag/setup. 3792 * 3793 * For some situations (eg EDMA TX completion), there isn't a requirement 3794 * for the ath_buf entries to be allocated. 3795 */ 3796 int 3797 ath_descdma_alloc_desc(struct ath_softc *sc, 3798 struct ath_descdma *dd, ath_bufhead *head, 3799 const char *name, int ds_size, int ndesc) 3800 { 3801 #define DS2PHYS(_dd, _ds) \ 3802 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc)) 3803 #define ATH_DESC_4KB_BOUND_CHECK(_daddr, _len) \ 3804 ((((u_int32_t)(_daddr) & 0xFFF) > (0x1000 - (_len))) ? 1 : 0) 3805 struct ifnet *ifp = sc->sc_ifp; 3806 int error; 3807 3808 dd->dd_descsize = ds_size; 3809 3810 DPRINTF(sc, ATH_DEBUG_RESET, 3811 "%s: %s DMA: %u desc, %d bytes per descriptor\n", 3812 __func__, name, ndesc, dd->dd_descsize); 3813 3814 dd->dd_name = name; 3815 dd->dd_desc_len = dd->dd_descsize * ndesc; 3816 3817 /* 3818 * Merlin work-around: 3819 * Descriptors that cross the 4KB boundary can't be used. 3820 * Assume one skipped descriptor per 4KB page. 3821 */ 3822 if (! ath_hal_split4ktrans(sc->sc_ah)) { 3823 int numpages = dd->dd_desc_len / 4096; 3824 dd->dd_desc_len += ds_size * numpages; 3825 } 3826 3827 /* 3828 * Setup DMA descriptor area. 3829 * 3830 * BUS_DMA_ALLOCNOW is not used; we never use bounce 3831 * buffers for the descriptors themselves. 3832 */ 3833 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), /* parent */ 3834 PAGE_SIZE, 0, /* alignment, bounds */ 3835 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 3836 BUS_SPACE_MAXADDR, /* highaddr */ 3837 NULL, NULL, /* filter, filterarg */ 3838 dd->dd_desc_len, /* maxsize */ 3839 1, /* nsegments */ 3840 dd->dd_desc_len, /* maxsegsize */ 3841 0, /* flags */ 3842 NULL, /* lockfunc */ 3843 NULL, /* lockarg */ 3844 &dd->dd_dmat); 3845 if (error != 0) { 3846 if_printf(ifp, "cannot allocate %s DMA tag\n", dd->dd_name); 3847 return error; 3848 } 3849 3850 /* allocate descriptors */ 3851 error = bus_dmamem_alloc(dd->dd_dmat, (void**) &dd->dd_desc, 3852 BUS_DMA_NOWAIT | BUS_DMA_COHERENT, 3853 &dd->dd_dmamap); 3854 if (error != 0) { 3855 if_printf(ifp, "unable to alloc memory for %u %s descriptors, " 3856 "error %u\n", ndesc, dd->dd_name, error); 3857 goto fail1; 3858 } 3859 3860 error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap, 3861 dd->dd_desc, dd->dd_desc_len, 3862 ath_load_cb, &dd->dd_desc_paddr, 3863 BUS_DMA_NOWAIT); 3864 if (error != 0) { 3865 if_printf(ifp, "unable to map %s descriptors, error %u\n", 3866 dd->dd_name, error); 3867 goto fail2; 3868 } 3869 3870 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA map: %p (%lu) -> %p (%lu)\n", 3871 __func__, dd->dd_name, (uint8_t *) dd->dd_desc, 3872 (u_long) dd->dd_desc_len, (caddr_t) dd->dd_desc_paddr, 3873 /*XXX*/ (u_long) dd->dd_desc_len); 3874 3875 return (0); 3876 3877 fail2: 3878 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); 3879 fail1: 3880 bus_dma_tag_destroy(dd->dd_dmat); 3881 memset(dd, 0, sizeof(*dd)); 3882 return error; 3883 #undef DS2PHYS 3884 #undef ATH_DESC_4KB_BOUND_CHECK 3885 } 3886 3887 int 3888 ath_descdma_setup(struct ath_softc *sc, 3889 struct ath_descdma *dd, ath_bufhead *head, 3890 const char *name, int ds_size, int nbuf, int ndesc) 3891 { 3892 #define DS2PHYS(_dd, _ds) \ 3893 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc)) 3894 #define ATH_DESC_4KB_BOUND_CHECK(_daddr, _len) \ 3895 ((((u_int32_t)(_daddr) & 0xFFF) > (0x1000 - (_len))) ? 1 : 0) 3896 struct ifnet *ifp = sc->sc_ifp; 3897 uint8_t *ds; 3898 struct ath_buf *bf; 3899 int i, bsize, error; 3900 3901 /* Allocate descriptors */ 3902 error = ath_descdma_alloc_desc(sc, dd, head, name, ds_size, 3903 nbuf * ndesc); 3904 3905 /* Assume any errors during allocation were dealt with */ 3906 if (error != 0) { 3907 return (error); 3908 } 3909 3910 ds = (uint8_t *) dd->dd_desc; 3911 3912 /* allocate rx buffers */ 3913 bsize = sizeof(struct ath_buf) * nbuf; 3914 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO); 3915 if (bf == NULL) { 3916 if_printf(ifp, "malloc of %s buffers failed, size %u\n", 3917 dd->dd_name, bsize); 3918 goto fail3; 3919 } 3920 dd->dd_bufptr = bf; 3921 3922 TAILQ_INIT(head); 3923 for (i = 0; i < nbuf; i++, bf++, ds += (ndesc * dd->dd_descsize)) { 3924 bf->bf_desc = (struct ath_desc *) ds; 3925 bf->bf_daddr = DS2PHYS(dd, ds); 3926 if (! ath_hal_split4ktrans(sc->sc_ah)) { 3927 /* 3928 * Merlin WAR: Skip descriptor addresses which 3929 * cause 4KB boundary crossing along any point 3930 * in the descriptor. 3931 */ 3932 if (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr, 3933 dd->dd_descsize)) { 3934 /* Start at the next page */ 3935 ds += 0x1000 - (bf->bf_daddr & 0xFFF); 3936 bf->bf_desc = (struct ath_desc *) ds; 3937 bf->bf_daddr = DS2PHYS(dd, ds); 3938 } 3939 } 3940 error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT, 3941 &bf->bf_dmamap); 3942 if (error != 0) { 3943 if_printf(ifp, "unable to create dmamap for %s " 3944 "buffer %u, error %u\n", dd->dd_name, i, error); 3945 ath_descdma_cleanup(sc, dd, head); 3946 return error; 3947 } 3948 bf->bf_lastds = bf->bf_desc; /* Just an initial value */ 3949 TAILQ_INSERT_TAIL(head, bf, bf_list); 3950 } 3951 3952 /* 3953 * XXX TODO: ensure that ds doesn't overflow the descriptor 3954 * allocation otherwise weird stuff will occur and crash your 3955 * machine. 3956 */ 3957 return 0; 3958 /* XXX this should likely just call ath_descdma_cleanup() */ 3959 fail3: 3960 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 3961 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); 3962 bus_dma_tag_destroy(dd->dd_dmat); 3963 memset(dd, 0, sizeof(*dd)); 3964 return error; 3965 #undef DS2PHYS 3966 #undef ATH_DESC_4KB_BOUND_CHECK 3967 } 3968 3969 /* 3970 * Allocate ath_buf entries but no descriptor contents. 3971 * 3972 * This is for RX EDMA where the descriptors are the header part of 3973 * the RX buffer. 3974 */ 3975 int 3976 ath_descdma_setup_rx_edma(struct ath_softc *sc, 3977 struct ath_descdma *dd, ath_bufhead *head, 3978 const char *name, int nbuf, int rx_status_len) 3979 { 3980 struct ifnet *ifp = sc->sc_ifp; 3981 struct ath_buf *bf; 3982 int i, bsize, error; 3983 3984 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA: %u buffers\n", 3985 __func__, name, nbuf); 3986 3987 dd->dd_name = name; 3988 /* 3989 * This is (mostly) purely for show. We're not allocating any actual 3990 * descriptors here as EDMA RX has the descriptor be part 3991 * of the RX buffer. 3992 * 3993 * However, dd_desc_len is used by ath_descdma_free() to determine 3994 * whether we have already freed this DMA mapping. 3995 */ 3996 dd->dd_desc_len = rx_status_len * nbuf; 3997 dd->dd_descsize = rx_status_len; 3998 3999 /* allocate rx buffers */ 4000 bsize = sizeof(struct ath_buf) * nbuf; 4001 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO); 4002 if (bf == NULL) { 4003 if_printf(ifp, "malloc of %s buffers failed, size %u\n", 4004 dd->dd_name, bsize); 4005 error = ENOMEM; 4006 goto fail3; 4007 } 4008 dd->dd_bufptr = bf; 4009 4010 TAILQ_INIT(head); 4011 for (i = 0; i < nbuf; i++, bf++) { 4012 bf->bf_desc = NULL; 4013 bf->bf_daddr = 0; 4014 bf->bf_lastds = NULL; /* Just an initial value */ 4015 4016 error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT, 4017 &bf->bf_dmamap); 4018 if (error != 0) { 4019 if_printf(ifp, "unable to create dmamap for %s " 4020 "buffer %u, error %u\n", dd->dd_name, i, error); 4021 ath_descdma_cleanup(sc, dd, head); 4022 return error; 4023 } 4024 TAILQ_INSERT_TAIL(head, bf, bf_list); 4025 } 4026 return 0; 4027 fail3: 4028 memset(dd, 0, sizeof(*dd)); 4029 return error; 4030 } 4031 4032 void 4033 ath_descdma_cleanup(struct ath_softc *sc, 4034 struct ath_descdma *dd, ath_bufhead *head) 4035 { 4036 struct ath_buf *bf; 4037 struct ieee80211_node *ni; 4038 int do_warning = 0; 4039 4040 if (dd->dd_dmamap != 0) { 4041 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 4042 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); 4043 bus_dma_tag_destroy(dd->dd_dmat); 4044 } 4045 4046 if (head != NULL) { 4047 TAILQ_FOREACH(bf, head, bf_list) { 4048 if (bf->bf_m) { 4049 /* 4050 * XXX warn if there's buffers here. 4051 * XXX it should have been freed by the 4052 * owner! 4053 */ 4054 4055 if (do_warning == 0) { 4056 do_warning = 1; 4057 device_printf(sc->sc_dev, 4058 "%s: %s: mbuf should've been" 4059 " unmapped/freed!\n", 4060 __func__, 4061 dd->dd_name); 4062 } 4063 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 4064 BUS_DMASYNC_POSTREAD); 4065 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 4066 m_freem(bf->bf_m); 4067 bf->bf_m = NULL; 4068 } 4069 if (bf->bf_dmamap != NULL) { 4070 bus_dmamap_destroy(sc->sc_dmat, bf->bf_dmamap); 4071 bf->bf_dmamap = NULL; 4072 } 4073 ni = bf->bf_node; 4074 bf->bf_node = NULL; 4075 if (ni != NULL) { 4076 /* 4077 * Reclaim node reference. 4078 */ 4079 ieee80211_free_node(ni); 4080 } 4081 } 4082 } 4083 4084 if (head != NULL) 4085 TAILQ_INIT(head); 4086 4087 if (dd->dd_bufptr != NULL) 4088 free(dd->dd_bufptr, M_ATHDEV); 4089 memset(dd, 0, sizeof(*dd)); 4090 } 4091 4092 static int 4093 ath_desc_alloc(struct ath_softc *sc) 4094 { 4095 int error; 4096 4097 error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf, 4098 "tx", sc->sc_tx_desclen, ath_txbuf, ATH_MAX_SCATTER); 4099 if (error != 0) { 4100 return error; 4101 } 4102 sc->sc_txbuf_cnt = ath_txbuf; 4103 4104 error = ath_descdma_setup(sc, &sc->sc_txdma_mgmt, &sc->sc_txbuf_mgmt, 4105 "tx_mgmt", sc->sc_tx_desclen, ath_txbuf_mgmt, 4106 ATH_TXDESC); 4107 if (error != 0) { 4108 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 4109 return error; 4110 } 4111 4112 /* 4113 * XXX mark txbuf_mgmt frames with ATH_BUF_MGMT, so the 4114 * flag doesn't have to be set in ath_getbuf_locked(). 4115 */ 4116 4117 error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf, 4118 "beacon", sc->sc_tx_desclen, ATH_BCBUF, 1); 4119 if (error != 0) { 4120 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 4121 ath_descdma_cleanup(sc, &sc->sc_txdma_mgmt, 4122 &sc->sc_txbuf_mgmt); 4123 return error; 4124 } 4125 return 0; 4126 } 4127 4128 static void 4129 ath_desc_free(struct ath_softc *sc) 4130 { 4131 4132 if (sc->sc_bdma.dd_desc_len != 0) 4133 ath_descdma_cleanup(sc, &sc->sc_bdma, &sc->sc_bbuf); 4134 if (sc->sc_txdma.dd_desc_len != 0) 4135 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 4136 if (sc->sc_txdma_mgmt.dd_desc_len != 0) 4137 ath_descdma_cleanup(sc, &sc->sc_txdma_mgmt, 4138 &sc->sc_txbuf_mgmt); 4139 } 4140 4141 static struct ieee80211_node * 4142 ath_node_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN]) 4143 { 4144 struct ieee80211com *ic = vap->iv_ic; 4145 struct ath_softc *sc = ic->ic_ifp->if_softc; 4146 const size_t space = sizeof(struct ath_node) + sc->sc_rc->arc_space; 4147 struct ath_node *an; 4148 4149 an = malloc(space, M_80211_NODE, M_NOWAIT|M_ZERO); 4150 if (an == NULL) { 4151 /* XXX stat+msg */ 4152 return NULL; 4153 } 4154 ath_rate_node_init(sc, an); 4155 4156 /* Setup the mutex - there's no associd yet so set the name to NULL */ 4157 snprintf(an->an_name, sizeof(an->an_name), "%s: node %p", 4158 device_get_nameunit(sc->sc_dev), an); 4159 mtx_init(&an->an_mtx, an->an_name, NULL, MTX_DEF); 4160 4161 /* XXX setup ath_tid */ 4162 ath_tx_tid_init(sc, an); 4163 4164 DPRINTF(sc, ATH_DEBUG_NODE, "%s: %6D: an %p\n", __func__, mac, ":", an); 4165 return &an->an_node; 4166 } 4167 4168 static void 4169 ath_node_cleanup(struct ieee80211_node *ni) 4170 { 4171 struct ieee80211com *ic = ni->ni_ic; 4172 struct ath_softc *sc = ic->ic_ifp->if_softc; 4173 4174 DPRINTF(sc, ATH_DEBUG_NODE, "%s: %6D: an %p\n", __func__, 4175 ni->ni_macaddr, ":", ATH_NODE(ni)); 4176 4177 /* Cleanup ath_tid, free unused bufs, unlink bufs in TXQ */ 4178 ath_tx_node_flush(sc, ATH_NODE(ni)); 4179 ath_rate_node_cleanup(sc, ATH_NODE(ni)); 4180 sc->sc_node_cleanup(ni); 4181 } 4182 4183 static void 4184 ath_node_free(struct ieee80211_node *ni) 4185 { 4186 struct ieee80211com *ic = ni->ni_ic; 4187 struct ath_softc *sc = ic->ic_ifp->if_softc; 4188 4189 DPRINTF(sc, ATH_DEBUG_NODE, "%s: %6D: an %p\n", __func__, 4190 ni->ni_macaddr, ":", ATH_NODE(ni)); 4191 mtx_destroy(&ATH_NODE(ni)->an_mtx); 4192 sc->sc_node_free(ni); 4193 } 4194 4195 static void 4196 ath_node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 4197 { 4198 struct ieee80211com *ic = ni->ni_ic; 4199 struct ath_softc *sc = ic->ic_ifp->if_softc; 4200 struct ath_hal *ah = sc->sc_ah; 4201 4202 *rssi = ic->ic_node_getrssi(ni); 4203 if (ni->ni_chan != IEEE80211_CHAN_ANYC) 4204 *noise = ath_hal_getchannoise(ah, ni->ni_chan); 4205 else 4206 *noise = -95; /* nominally correct */ 4207 } 4208 4209 /* 4210 * Set the default antenna. 4211 */ 4212 void 4213 ath_setdefantenna(struct ath_softc *sc, u_int antenna) 4214 { 4215 struct ath_hal *ah = sc->sc_ah; 4216 4217 /* XXX block beacon interrupts */ 4218 ath_hal_setdefantenna(ah, antenna); 4219 if (sc->sc_defant != antenna) 4220 sc->sc_stats.ast_ant_defswitch++; 4221 sc->sc_defant = antenna; 4222 sc->sc_rxotherant = 0; 4223 } 4224 4225 static void 4226 ath_txq_init(struct ath_softc *sc, struct ath_txq *txq, int qnum) 4227 { 4228 txq->axq_qnum = qnum; 4229 txq->axq_ac = 0; 4230 txq->axq_depth = 0; 4231 txq->axq_aggr_depth = 0; 4232 txq->axq_intrcnt = 0; 4233 txq->axq_link = NULL; 4234 txq->axq_softc = sc; 4235 TAILQ_INIT(&txq->axq_q); 4236 TAILQ_INIT(&txq->axq_tidq); 4237 TAILQ_INIT(&txq->fifo.axq_q); 4238 ATH_TXQ_LOCK_INIT(sc, txq); 4239 } 4240 4241 /* 4242 * Setup a h/w transmit queue. 4243 */ 4244 static struct ath_txq * 4245 ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) 4246 { 4247 #define N(a) (sizeof(a)/sizeof(a[0])) 4248 struct ath_hal *ah = sc->sc_ah; 4249 HAL_TXQ_INFO qi; 4250 int qnum; 4251 4252 memset(&qi, 0, sizeof(qi)); 4253 qi.tqi_subtype = subtype; 4254 qi.tqi_aifs = HAL_TXQ_USEDEFAULT; 4255 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; 4256 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; 4257 /* 4258 * Enable interrupts only for EOL and DESC conditions. 4259 * We mark tx descriptors to receive a DESC interrupt 4260 * when a tx queue gets deep; otherwise waiting for the 4261 * EOL to reap descriptors. Note that this is done to 4262 * reduce interrupt load and this only defers reaping 4263 * descriptors, never transmitting frames. Aside from 4264 * reducing interrupts this also permits more concurrency. 4265 * The only potential downside is if the tx queue backs 4266 * up in which case the top half of the kernel may backup 4267 * due to a lack of tx descriptors. 4268 */ 4269 if (sc->sc_isedma) 4270 qi.tqi_qflags = HAL_TXQ_TXEOLINT_ENABLE | 4271 HAL_TXQ_TXOKINT_ENABLE; 4272 else 4273 qi.tqi_qflags = HAL_TXQ_TXEOLINT_ENABLE | 4274 HAL_TXQ_TXDESCINT_ENABLE; 4275 4276 qnum = ath_hal_setuptxqueue(ah, qtype, &qi); 4277 if (qnum == -1) { 4278 /* 4279 * NB: don't print a message, this happens 4280 * normally on parts with too few tx queues 4281 */ 4282 return NULL; 4283 } 4284 if (qnum >= N(sc->sc_txq)) { 4285 device_printf(sc->sc_dev, 4286 "hal qnum %u out of range, max %zu!\n", 4287 qnum, N(sc->sc_txq)); 4288 ath_hal_releasetxqueue(ah, qnum); 4289 return NULL; 4290 } 4291 if (!ATH_TXQ_SETUP(sc, qnum)) { 4292 ath_txq_init(sc, &sc->sc_txq[qnum], qnum); 4293 sc->sc_txqsetup |= 1<<qnum; 4294 } 4295 return &sc->sc_txq[qnum]; 4296 #undef N 4297 } 4298 4299 /* 4300 * Setup a hardware data transmit queue for the specified 4301 * access control. The hal may not support all requested 4302 * queues in which case it will return a reference to a 4303 * previously setup queue. We record the mapping from ac's 4304 * to h/w queues for use by ath_tx_start and also track 4305 * the set of h/w queues being used to optimize work in the 4306 * transmit interrupt handler and related routines. 4307 */ 4308 static int 4309 ath_tx_setup(struct ath_softc *sc, int ac, int haltype) 4310 { 4311 #define N(a) (sizeof(a)/sizeof(a[0])) 4312 struct ath_txq *txq; 4313 4314 if (ac >= N(sc->sc_ac2q)) { 4315 device_printf(sc->sc_dev, "AC %u out of range, max %zu!\n", 4316 ac, N(sc->sc_ac2q)); 4317 return 0; 4318 } 4319 txq = ath_txq_setup(sc, HAL_TX_QUEUE_DATA, haltype); 4320 if (txq != NULL) { 4321 txq->axq_ac = ac; 4322 sc->sc_ac2q[ac] = txq; 4323 return 1; 4324 } else 4325 return 0; 4326 #undef N 4327 } 4328 4329 /* 4330 * Update WME parameters for a transmit queue. 4331 */ 4332 static int 4333 ath_txq_update(struct ath_softc *sc, int ac) 4334 { 4335 #define ATH_EXPONENT_TO_VALUE(v) ((1<<v)-1) 4336 #define ATH_TXOP_TO_US(v) (v<<5) 4337 struct ifnet *ifp = sc->sc_ifp; 4338 struct ieee80211com *ic = ifp->if_l2com; 4339 struct ath_txq *txq = sc->sc_ac2q[ac]; 4340 struct wmeParams *wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 4341 struct ath_hal *ah = sc->sc_ah; 4342 HAL_TXQ_INFO qi; 4343 4344 ath_hal_gettxqueueprops(ah, txq->axq_qnum, &qi); 4345 #ifdef IEEE80211_SUPPORT_TDMA 4346 if (sc->sc_tdma) { 4347 /* 4348 * AIFS is zero so there's no pre-transmit wait. The 4349 * burst time defines the slot duration and is configured 4350 * through net80211. The QCU is setup to not do post-xmit 4351 * back off, lockout all lower-priority QCU's, and fire 4352 * off the DMA beacon alert timer which is setup based 4353 * on the slot configuration. 4354 */ 4355 qi.tqi_qflags = HAL_TXQ_TXOKINT_ENABLE 4356 | HAL_TXQ_TXERRINT_ENABLE 4357 | HAL_TXQ_TXURNINT_ENABLE 4358 | HAL_TXQ_TXEOLINT_ENABLE 4359 | HAL_TXQ_DBA_GATED 4360 | HAL_TXQ_BACKOFF_DISABLE 4361 | HAL_TXQ_ARB_LOCKOUT_GLOBAL 4362 ; 4363 qi.tqi_aifs = 0; 4364 /* XXX +dbaprep? */ 4365 qi.tqi_readyTime = sc->sc_tdmaslotlen; 4366 qi.tqi_burstTime = qi.tqi_readyTime; 4367 } else { 4368 #endif 4369 /* 4370 * XXX shouldn't this just use the default flags 4371 * used in the previous queue setup? 4372 */ 4373 qi.tqi_qflags = HAL_TXQ_TXOKINT_ENABLE 4374 | HAL_TXQ_TXERRINT_ENABLE 4375 | HAL_TXQ_TXDESCINT_ENABLE 4376 | HAL_TXQ_TXURNINT_ENABLE 4377 | HAL_TXQ_TXEOLINT_ENABLE 4378 ; 4379 qi.tqi_aifs = wmep->wmep_aifsn; 4380 qi.tqi_cwmin = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); 4381 qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); 4382 qi.tqi_readyTime = 0; 4383 qi.tqi_burstTime = ATH_TXOP_TO_US(wmep->wmep_txopLimit); 4384 #ifdef IEEE80211_SUPPORT_TDMA 4385 } 4386 #endif 4387 4388 DPRINTF(sc, ATH_DEBUG_RESET, 4389 "%s: Q%u qflags 0x%x aifs %u cwmin %u cwmax %u burstTime %u\n", 4390 __func__, txq->axq_qnum, qi.tqi_qflags, 4391 qi.tqi_aifs, qi.tqi_cwmin, qi.tqi_cwmax, qi.tqi_burstTime); 4392 4393 if (!ath_hal_settxqueueprops(ah, txq->axq_qnum, &qi)) { 4394 if_printf(ifp, "unable to update hardware queue " 4395 "parameters for %s traffic!\n", 4396 ieee80211_wme_acnames[ac]); 4397 return 0; 4398 } else { 4399 ath_hal_resettxqueue(ah, txq->axq_qnum); /* push to h/w */ 4400 return 1; 4401 } 4402 #undef ATH_TXOP_TO_US 4403 #undef ATH_EXPONENT_TO_VALUE 4404 } 4405 4406 /* 4407 * Callback from the 802.11 layer to update WME parameters. 4408 */ 4409 int 4410 ath_wme_update(struct ieee80211com *ic) 4411 { 4412 struct ath_softc *sc = ic->ic_ifp->if_softc; 4413 4414 return !ath_txq_update(sc, WME_AC_BE) || 4415 !ath_txq_update(sc, WME_AC_BK) || 4416 !ath_txq_update(sc, WME_AC_VI) || 4417 !ath_txq_update(sc, WME_AC_VO) ? EIO : 0; 4418 } 4419 4420 /* 4421 * Reclaim resources for a setup queue. 4422 */ 4423 static void 4424 ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) 4425 { 4426 4427 ath_hal_releasetxqueue(sc->sc_ah, txq->axq_qnum); 4428 sc->sc_txqsetup &= ~(1<<txq->axq_qnum); 4429 ATH_TXQ_LOCK_DESTROY(txq); 4430 } 4431 4432 /* 4433 * Reclaim all tx queue resources. 4434 */ 4435 static void 4436 ath_tx_cleanup(struct ath_softc *sc) 4437 { 4438 int i; 4439 4440 ATH_TXBUF_LOCK_DESTROY(sc); 4441 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4442 if (ATH_TXQ_SETUP(sc, i)) 4443 ath_tx_cleanupq(sc, &sc->sc_txq[i]); 4444 } 4445 4446 /* 4447 * Return h/w rate index for an IEEE rate (w/o basic rate bit) 4448 * using the current rates in sc_rixmap. 4449 */ 4450 int 4451 ath_tx_findrix(const struct ath_softc *sc, uint8_t rate) 4452 { 4453 int rix = sc->sc_rixmap[rate]; 4454 /* NB: return lowest rix for invalid rate */ 4455 return (rix == 0xff ? 0 : rix); 4456 } 4457 4458 static void 4459 ath_tx_update_stats(struct ath_softc *sc, struct ath_tx_status *ts, 4460 struct ath_buf *bf) 4461 { 4462 struct ieee80211_node *ni = bf->bf_node; 4463 struct ifnet *ifp = sc->sc_ifp; 4464 struct ieee80211com *ic = ifp->if_l2com; 4465 int sr, lr, pri; 4466 4467 if (ts->ts_status == 0) { 4468 u_int8_t txant = ts->ts_antenna; 4469 sc->sc_stats.ast_ant_tx[txant]++; 4470 sc->sc_ant_tx[txant]++; 4471 if (ts->ts_finaltsi != 0) 4472 sc->sc_stats.ast_tx_altrate++; 4473 pri = M_WME_GETAC(bf->bf_m); 4474 if (pri >= WME_AC_VO) 4475 ic->ic_wme.wme_hipri_traffic++; 4476 if ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0) 4477 ni->ni_inact = ni->ni_inact_reload; 4478 } else { 4479 if (ts->ts_status & HAL_TXERR_XRETRY) 4480 sc->sc_stats.ast_tx_xretries++; 4481 if (ts->ts_status & HAL_TXERR_FIFO) 4482 sc->sc_stats.ast_tx_fifoerr++; 4483 if (ts->ts_status & HAL_TXERR_FILT) 4484 sc->sc_stats.ast_tx_filtered++; 4485 if (ts->ts_status & HAL_TXERR_XTXOP) 4486 sc->sc_stats.ast_tx_xtxop++; 4487 if (ts->ts_status & HAL_TXERR_TIMER_EXPIRED) 4488 sc->sc_stats.ast_tx_timerexpired++; 4489 4490 if (bf->bf_m->m_flags & M_FF) 4491 sc->sc_stats.ast_ff_txerr++; 4492 } 4493 /* XXX when is this valid? */ 4494 if (ts->ts_flags & HAL_TX_DESC_CFG_ERR) 4495 sc->sc_stats.ast_tx_desccfgerr++; 4496 /* 4497 * This can be valid for successful frame transmission! 4498 * If there's a TX FIFO underrun during aggregate transmission, 4499 * the MAC will pad the rest of the aggregate with delimiters. 4500 * If a BA is returned, the frame is marked as "OK" and it's up 4501 * to the TX completion code to notice which frames weren't 4502 * successfully transmitted. 4503 */ 4504 if (ts->ts_flags & HAL_TX_DATA_UNDERRUN) 4505 sc->sc_stats.ast_tx_data_underrun++; 4506 if (ts->ts_flags & HAL_TX_DELIM_UNDERRUN) 4507 sc->sc_stats.ast_tx_delim_underrun++; 4508 4509 sr = ts->ts_shortretry; 4510 lr = ts->ts_longretry; 4511 sc->sc_stats.ast_tx_shortretry += sr; 4512 sc->sc_stats.ast_tx_longretry += lr; 4513 4514 } 4515 4516 /* 4517 * The default completion. If fail is 1, this means 4518 * "please don't retry the frame, and just return -1 status 4519 * to the net80211 stack. 4520 */ 4521 void 4522 ath_tx_default_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 4523 { 4524 struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 4525 int st; 4526 4527 if (fail == 1) 4528 st = -1; 4529 else 4530 st = ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0) ? 4531 ts->ts_status : HAL_TXERR_XRETRY; 4532 4533 #if 0 4534 if (bf->bf_state.bfs_dobaw) 4535 device_printf(sc->sc_dev, 4536 "%s: bf %p: seqno %d: dobaw should've been cleared!\n", 4537 __func__, 4538 bf, 4539 SEQNO(bf->bf_state.bfs_seqno)); 4540 #endif 4541 if (bf->bf_next != NULL) 4542 device_printf(sc->sc_dev, 4543 "%s: bf %p: seqno %d: bf_next not NULL!\n", 4544 __func__, 4545 bf, 4546 SEQNO(bf->bf_state.bfs_seqno)); 4547 4548 /* 4549 * Check if the node software queue is empty; if so 4550 * then clear the TIM. 4551 * 4552 * This needs to be done before the buffer is freed as 4553 * otherwise the node reference will have been released 4554 * and the node may not actually exist any longer. 4555 * 4556 * XXX I don't like this belonging here, but it's cleaner 4557 * to do it here right now then all the other places 4558 * where ath_tx_default_comp() is called. 4559 * 4560 * XXX TODO: during drain, ensure that the callback is 4561 * being called so we get a chance to update the TIM. 4562 */ 4563 if (bf->bf_node) { 4564 ATH_TX_LOCK(sc); 4565 ath_tx_update_tim(sc, bf->bf_node, 0); 4566 ATH_TX_UNLOCK(sc); 4567 } 4568 4569 /* 4570 * Do any tx complete callback. Note this must 4571 * be done before releasing the node reference. 4572 * This will free the mbuf, release the net80211 4573 * node and recycle the ath_buf. 4574 */ 4575 ath_tx_freebuf(sc, bf, st); 4576 } 4577 4578 /* 4579 * Update rate control with the given completion status. 4580 */ 4581 void 4582 ath_tx_update_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 4583 struct ath_rc_series *rc, struct ath_tx_status *ts, int frmlen, 4584 int nframes, int nbad) 4585 { 4586 struct ath_node *an; 4587 4588 /* Only for unicast frames */ 4589 if (ni == NULL) 4590 return; 4591 4592 an = ATH_NODE(ni); 4593 ATH_NODE_UNLOCK_ASSERT(an); 4594 4595 if ((ts->ts_status & HAL_TXERR_FILT) == 0) { 4596 ATH_NODE_LOCK(an); 4597 ath_rate_tx_complete(sc, an, rc, ts, frmlen, nframes, nbad); 4598 ATH_NODE_UNLOCK(an); 4599 } 4600 } 4601 4602 /* 4603 * Process the completion of the given buffer. 4604 * 4605 * This calls the rate control update and then the buffer completion. 4606 * This will either free the buffer or requeue it. In any case, the 4607 * bf pointer should be treated as invalid after this function is called. 4608 */ 4609 void 4610 ath_tx_process_buf_completion(struct ath_softc *sc, struct ath_txq *txq, 4611 struct ath_tx_status *ts, struct ath_buf *bf) 4612 { 4613 struct ieee80211_node *ni = bf->bf_node; 4614 4615 ATH_TX_UNLOCK_ASSERT(sc); 4616 ATH_TXQ_UNLOCK_ASSERT(txq); 4617 4618 /* If unicast frame, update general statistics */ 4619 if (ni != NULL) { 4620 /* update statistics */ 4621 ath_tx_update_stats(sc, ts, bf); 4622 } 4623 4624 /* 4625 * Call the completion handler. 4626 * The completion handler is responsible for 4627 * calling the rate control code. 4628 * 4629 * Frames with no completion handler get the 4630 * rate control code called here. 4631 */ 4632 if (bf->bf_comp == NULL) { 4633 if ((ts->ts_status & HAL_TXERR_FILT) == 0 && 4634 (bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0) { 4635 /* 4636 * XXX assume this isn't an aggregate 4637 * frame. 4638 */ 4639 ath_tx_update_ratectrl(sc, ni, 4640 bf->bf_state.bfs_rc, ts, 4641 bf->bf_state.bfs_pktlen, 1, 4642 (ts->ts_status == 0 ? 0 : 1)); 4643 } 4644 ath_tx_default_comp(sc, bf, 0); 4645 } else 4646 bf->bf_comp(sc, bf, 0); 4647 } 4648 4649 4650 4651 /* 4652 * Process completed xmit descriptors from the specified queue. 4653 * Kick the packet scheduler if needed. This can occur from this 4654 * particular task. 4655 */ 4656 static int 4657 ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq, int dosched) 4658 { 4659 struct ath_hal *ah = sc->sc_ah; 4660 struct ath_buf *bf; 4661 struct ath_desc *ds; 4662 struct ath_tx_status *ts; 4663 struct ieee80211_node *ni; 4664 #ifdef IEEE80211_SUPPORT_SUPERG 4665 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 4666 #endif /* IEEE80211_SUPPORT_SUPERG */ 4667 int nacked; 4668 HAL_STATUS status; 4669 4670 DPRINTF(sc, ATH_DEBUG_TX_PROC, "%s: tx queue %u head %p link %p\n", 4671 __func__, txq->axq_qnum, 4672 (caddr_t)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum), 4673 txq->axq_link); 4674 4675 ATH_KTR(sc, ATH_KTR_TXCOMP, 4, 4676 "ath_tx_processq: txq=%u head %p link %p depth %p", 4677 txq->axq_qnum, 4678 (caddr_t)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum), 4679 txq->axq_link, 4680 txq->axq_depth); 4681 4682 nacked = 0; 4683 for (;;) { 4684 ATH_TXQ_LOCK(txq); 4685 txq->axq_intrcnt = 0; /* reset periodic desc intr count */ 4686 bf = TAILQ_FIRST(&txq->axq_q); 4687 if (bf == NULL) { 4688 ATH_TXQ_UNLOCK(txq); 4689 break; 4690 } 4691 ds = bf->bf_lastds; /* XXX must be setup correctly! */ 4692 ts = &bf->bf_status.ds_txstat; 4693 4694 status = ath_hal_txprocdesc(ah, ds, ts); 4695 #ifdef ATH_DEBUG 4696 if (sc->sc_debug & ATH_DEBUG_XMIT_DESC) 4697 ath_printtxbuf(sc, bf, txq->axq_qnum, 0, 4698 status == HAL_OK); 4699 else if ((sc->sc_debug & ATH_DEBUG_RESET) && (dosched == 0)) 4700 ath_printtxbuf(sc, bf, txq->axq_qnum, 0, 4701 status == HAL_OK); 4702 #endif 4703 #ifdef ATH_DEBUG_ALQ 4704 if (if_ath_alq_checkdebug(&sc->sc_alq, 4705 ATH_ALQ_EDMA_TXSTATUS)) { 4706 if_ath_alq_post(&sc->sc_alq, ATH_ALQ_EDMA_TXSTATUS, 4707 sc->sc_tx_statuslen, 4708 (char *) ds); 4709 } 4710 #endif 4711 4712 if (status == HAL_EINPROGRESS) { 4713 ATH_KTR(sc, ATH_KTR_TXCOMP, 3, 4714 "ath_tx_processq: txq=%u, bf=%p ds=%p, HAL_EINPROGRESS", 4715 txq->axq_qnum, bf, ds); 4716 ATH_TXQ_UNLOCK(txq); 4717 break; 4718 } 4719 ATH_TXQ_REMOVE(txq, bf, bf_list); 4720 4721 /* 4722 * Sanity check. 4723 */ 4724 if (txq->axq_qnum != bf->bf_state.bfs_tx_queue) { 4725 device_printf(sc->sc_dev, 4726 "%s: TXQ=%d: bf=%p, bfs_tx_queue=%d\n", 4727 __func__, 4728 txq->axq_qnum, 4729 bf, 4730 bf->bf_state.bfs_tx_queue); 4731 } 4732 if (txq->axq_qnum != bf->bf_last->bf_state.bfs_tx_queue) { 4733 device_printf(sc->sc_dev, 4734 "%s: TXQ=%d: bf_last=%p, bfs_tx_queue=%d\n", 4735 __func__, 4736 txq->axq_qnum, 4737 bf->bf_last, 4738 bf->bf_last->bf_state.bfs_tx_queue); 4739 } 4740 4741 #if 0 4742 if (txq->axq_depth > 0) { 4743 /* 4744 * More frames follow. Mark the buffer busy 4745 * so it's not re-used while the hardware may 4746 * still re-read the link field in the descriptor. 4747 * 4748 * Use the last buffer in an aggregate as that 4749 * is where the hardware may be - intermediate 4750 * descriptors won't be "busy". 4751 */ 4752 bf->bf_last->bf_flags |= ATH_BUF_BUSY; 4753 } else 4754 txq->axq_link = NULL; 4755 #else 4756 bf->bf_last->bf_flags |= ATH_BUF_BUSY; 4757 #endif 4758 if (bf->bf_state.bfs_aggr) 4759 txq->axq_aggr_depth--; 4760 4761 ni = bf->bf_node; 4762 4763 ATH_KTR(sc, ATH_KTR_TXCOMP, 5, 4764 "ath_tx_processq: txq=%u, bf=%p, ds=%p, ni=%p, ts_status=0x%08x", 4765 txq->axq_qnum, bf, ds, ni, ts->ts_status); 4766 /* 4767 * If unicast frame was ack'd update RSSI, 4768 * including the last rx time used to 4769 * workaround phantom bmiss interrupts. 4770 */ 4771 if (ni != NULL && ts->ts_status == 0 && 4772 ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) { 4773 nacked++; 4774 sc->sc_stats.ast_tx_rssi = ts->ts_rssi; 4775 ATH_RSSI_LPF(sc->sc_halstats.ns_avgtxrssi, 4776 ts->ts_rssi); 4777 } 4778 ATH_TXQ_UNLOCK(txq); 4779 4780 /* 4781 * Update statistics and call completion 4782 */ 4783 ath_tx_process_buf_completion(sc, txq, ts, bf); 4784 4785 /* XXX at this point, bf and ni may be totally invalid */ 4786 } 4787 #ifdef IEEE80211_SUPPORT_SUPERG 4788 /* 4789 * Flush fast-frame staging queue when traffic slows. 4790 */ 4791 if (txq->axq_depth <= 1) 4792 ieee80211_ff_flush(ic, txq->axq_ac); 4793 #endif 4794 4795 /* Kick the software TXQ scheduler */ 4796 if (dosched) { 4797 ATH_TX_LOCK(sc); 4798 ath_txq_sched(sc, txq); 4799 ATH_TX_UNLOCK(sc); 4800 } 4801 4802 ATH_KTR(sc, ATH_KTR_TXCOMP, 1, 4803 "ath_tx_processq: txq=%u: done", 4804 txq->axq_qnum); 4805 4806 return nacked; 4807 } 4808 4809 #define TXQACTIVE(t, q) ( (t) & (1 << (q))) 4810 4811 /* 4812 * Deferred processing of transmit interrupt; special-cased 4813 * for a single hardware transmit queue (e.g. 5210 and 5211). 4814 */ 4815 static void 4816 ath_tx_proc_q0(void *arg, int npending) 4817 { 4818 struct ath_softc *sc = arg; 4819 struct ifnet *ifp = sc->sc_ifp; 4820 uint32_t txqs; 4821 4822 ATH_PCU_LOCK(sc); 4823 sc->sc_txproc_cnt++; 4824 txqs = sc->sc_txq_active; 4825 sc->sc_txq_active &= ~txqs; 4826 ATH_PCU_UNLOCK(sc); 4827 4828 ATH_LOCK(sc); 4829 ath_power_set_power_state(sc, HAL_PM_AWAKE); 4830 ATH_UNLOCK(sc); 4831 4832 ATH_KTR(sc, ATH_KTR_TXCOMP, 1, 4833 "ath_tx_proc_q0: txqs=0x%08x", txqs); 4834 4835 if (TXQACTIVE(txqs, 0) && ath_tx_processq(sc, &sc->sc_txq[0], 1)) 4836 /* XXX why is lastrx updated in tx code? */ 4837 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4838 if (TXQACTIVE(txqs, sc->sc_cabq->axq_qnum)) 4839 ath_tx_processq(sc, sc->sc_cabq, 1); 4840 IF_LOCK(&ifp->if_snd); 4841 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4842 IF_UNLOCK(&ifp->if_snd); 4843 sc->sc_wd_timer = 0; 4844 4845 if (sc->sc_softled) 4846 ath_led_event(sc, sc->sc_txrix); 4847 4848 ATH_PCU_LOCK(sc); 4849 sc->sc_txproc_cnt--; 4850 ATH_PCU_UNLOCK(sc); 4851 4852 ATH_LOCK(sc); 4853 ath_power_restore_power_state(sc); 4854 ATH_UNLOCK(sc); 4855 4856 ath_tx_kick(sc); 4857 } 4858 4859 /* 4860 * Deferred processing of transmit interrupt; special-cased 4861 * for four hardware queues, 0-3 (e.g. 5212 w/ WME support). 4862 */ 4863 static void 4864 ath_tx_proc_q0123(void *arg, int npending) 4865 { 4866 struct ath_softc *sc = arg; 4867 struct ifnet *ifp = sc->sc_ifp; 4868 int nacked; 4869 uint32_t txqs; 4870 4871 ATH_PCU_LOCK(sc); 4872 sc->sc_txproc_cnt++; 4873 txqs = sc->sc_txq_active; 4874 sc->sc_txq_active &= ~txqs; 4875 ATH_PCU_UNLOCK(sc); 4876 4877 ATH_LOCK(sc); 4878 ath_power_set_power_state(sc, HAL_PM_AWAKE); 4879 ATH_UNLOCK(sc); 4880 4881 ATH_KTR(sc, ATH_KTR_TXCOMP, 1, 4882 "ath_tx_proc_q0123: txqs=0x%08x", txqs); 4883 4884 /* 4885 * Process each active queue. 4886 */ 4887 nacked = 0; 4888 if (TXQACTIVE(txqs, 0)) 4889 nacked += ath_tx_processq(sc, &sc->sc_txq[0], 1); 4890 if (TXQACTIVE(txqs, 1)) 4891 nacked += ath_tx_processq(sc, &sc->sc_txq[1], 1); 4892 if (TXQACTIVE(txqs, 2)) 4893 nacked += ath_tx_processq(sc, &sc->sc_txq[2], 1); 4894 if (TXQACTIVE(txqs, 3)) 4895 nacked += ath_tx_processq(sc, &sc->sc_txq[3], 1); 4896 if (TXQACTIVE(txqs, sc->sc_cabq->axq_qnum)) 4897 ath_tx_processq(sc, sc->sc_cabq, 1); 4898 if (nacked) 4899 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4900 4901 IF_LOCK(&ifp->if_snd); 4902 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4903 IF_UNLOCK(&ifp->if_snd); 4904 sc->sc_wd_timer = 0; 4905 4906 if (sc->sc_softled) 4907 ath_led_event(sc, sc->sc_txrix); 4908 4909 ATH_PCU_LOCK(sc); 4910 sc->sc_txproc_cnt--; 4911 ATH_PCU_UNLOCK(sc); 4912 4913 ATH_LOCK(sc); 4914 ath_power_restore_power_state(sc); 4915 ATH_UNLOCK(sc); 4916 4917 ath_tx_kick(sc); 4918 } 4919 4920 /* 4921 * Deferred processing of transmit interrupt. 4922 */ 4923 static void 4924 ath_tx_proc(void *arg, int npending) 4925 { 4926 struct ath_softc *sc = arg; 4927 struct ifnet *ifp = sc->sc_ifp; 4928 int i, nacked; 4929 uint32_t txqs; 4930 4931 ATH_PCU_LOCK(sc); 4932 sc->sc_txproc_cnt++; 4933 txqs = sc->sc_txq_active; 4934 sc->sc_txq_active &= ~txqs; 4935 ATH_PCU_UNLOCK(sc); 4936 4937 ATH_LOCK(sc); 4938 ath_power_set_power_state(sc, HAL_PM_AWAKE); 4939 ATH_UNLOCK(sc); 4940 4941 ATH_KTR(sc, ATH_KTR_TXCOMP, 1, "ath_tx_proc: txqs=0x%08x", txqs); 4942 4943 /* 4944 * Process each active queue. 4945 */ 4946 nacked = 0; 4947 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4948 if (ATH_TXQ_SETUP(sc, i) && TXQACTIVE(txqs, i)) 4949 nacked += ath_tx_processq(sc, &sc->sc_txq[i], 1); 4950 if (nacked) 4951 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4952 4953 /* XXX check this inside of IF_LOCK? */ 4954 IF_LOCK(&ifp->if_snd); 4955 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4956 IF_UNLOCK(&ifp->if_snd); 4957 sc->sc_wd_timer = 0; 4958 4959 if (sc->sc_softled) 4960 ath_led_event(sc, sc->sc_txrix); 4961 4962 ATH_PCU_LOCK(sc); 4963 sc->sc_txproc_cnt--; 4964 ATH_PCU_UNLOCK(sc); 4965 4966 ATH_LOCK(sc); 4967 ath_power_restore_power_state(sc); 4968 ATH_UNLOCK(sc); 4969 4970 ath_tx_kick(sc); 4971 } 4972 #undef TXQACTIVE 4973 4974 /* 4975 * Deferred processing of TXQ rescheduling. 4976 */ 4977 static void 4978 ath_txq_sched_tasklet(void *arg, int npending) 4979 { 4980 struct ath_softc *sc = arg; 4981 int i; 4982 4983 /* XXX is skipping ok? */ 4984 ATH_PCU_LOCK(sc); 4985 #if 0 4986 if (sc->sc_inreset_cnt > 0) { 4987 device_printf(sc->sc_dev, 4988 "%s: sc_inreset_cnt > 0; skipping\n", __func__); 4989 ATH_PCU_UNLOCK(sc); 4990 return; 4991 } 4992 #endif 4993 sc->sc_txproc_cnt++; 4994 ATH_PCU_UNLOCK(sc); 4995 4996 ATH_LOCK(sc); 4997 ath_power_set_power_state(sc, HAL_PM_AWAKE); 4998 ATH_UNLOCK(sc); 4999 5000 ATH_TX_LOCK(sc); 5001 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { 5002 if (ATH_TXQ_SETUP(sc, i)) { 5003 ath_txq_sched(sc, &sc->sc_txq[i]); 5004 } 5005 } 5006 ATH_TX_UNLOCK(sc); 5007 5008 ATH_LOCK(sc); 5009 ath_power_restore_power_state(sc); 5010 ATH_UNLOCK(sc); 5011 5012 ATH_PCU_LOCK(sc); 5013 sc->sc_txproc_cnt--; 5014 ATH_PCU_UNLOCK(sc); 5015 } 5016 5017 void 5018 ath_returnbuf_tail(struct ath_softc *sc, struct ath_buf *bf) 5019 { 5020 5021 ATH_TXBUF_LOCK_ASSERT(sc); 5022 5023 if (bf->bf_flags & ATH_BUF_MGMT) 5024 TAILQ_INSERT_TAIL(&sc->sc_txbuf_mgmt, bf, bf_list); 5025 else { 5026 TAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 5027 sc->sc_txbuf_cnt++; 5028 if (sc->sc_txbuf_cnt > ath_txbuf) { 5029 device_printf(sc->sc_dev, 5030 "%s: sc_txbuf_cnt > %d?\n", 5031 __func__, 5032 ath_txbuf); 5033 sc->sc_txbuf_cnt = ath_txbuf; 5034 } 5035 } 5036 } 5037 5038 void 5039 ath_returnbuf_head(struct ath_softc *sc, struct ath_buf *bf) 5040 { 5041 5042 ATH_TXBUF_LOCK_ASSERT(sc); 5043 5044 if (bf->bf_flags & ATH_BUF_MGMT) 5045 TAILQ_INSERT_HEAD(&sc->sc_txbuf_mgmt, bf, bf_list); 5046 else { 5047 TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); 5048 sc->sc_txbuf_cnt++; 5049 if (sc->sc_txbuf_cnt > ATH_TXBUF) { 5050 device_printf(sc->sc_dev, 5051 "%s: sc_txbuf_cnt > %d?\n", 5052 __func__, 5053 ATH_TXBUF); 5054 sc->sc_txbuf_cnt = ATH_TXBUF; 5055 } 5056 } 5057 } 5058 5059 /* 5060 * Free the holding buffer if it exists 5061 */ 5062 void 5063 ath_txq_freeholdingbuf(struct ath_softc *sc, struct ath_txq *txq) 5064 { 5065 ATH_TXBUF_UNLOCK_ASSERT(sc); 5066 ATH_TXQ_LOCK_ASSERT(txq); 5067 5068 if (txq->axq_holdingbf == NULL) 5069 return; 5070 5071 txq->axq_holdingbf->bf_flags &= ~ATH_BUF_BUSY; 5072 5073 ATH_TXBUF_LOCK(sc); 5074 ath_returnbuf_tail(sc, txq->axq_holdingbf); 5075 ATH_TXBUF_UNLOCK(sc); 5076 5077 txq->axq_holdingbf = NULL; 5078 } 5079 5080 /* 5081 * Add this buffer to the holding queue, freeing the previous 5082 * one if it exists. 5083 */ 5084 static void 5085 ath_txq_addholdingbuf(struct ath_softc *sc, struct ath_buf *bf) 5086 { 5087 struct ath_txq *txq; 5088 5089 txq = &sc->sc_txq[bf->bf_state.bfs_tx_queue]; 5090 5091 ATH_TXBUF_UNLOCK_ASSERT(sc); 5092 ATH_TXQ_LOCK_ASSERT(txq); 5093 5094 /* XXX assert ATH_BUF_BUSY is set */ 5095 5096 /* XXX assert the tx queue is under the max number */ 5097 if (bf->bf_state.bfs_tx_queue > HAL_NUM_TX_QUEUES) { 5098 device_printf(sc->sc_dev, "%s: bf=%p: invalid tx queue (%d)\n", 5099 __func__, 5100 bf, 5101 bf->bf_state.bfs_tx_queue); 5102 bf->bf_flags &= ~ATH_BUF_BUSY; 5103 ath_returnbuf_tail(sc, bf); 5104 return; 5105 } 5106 ath_txq_freeholdingbuf(sc, txq); 5107 txq->axq_holdingbf = bf; 5108 } 5109 5110 /* 5111 * Return a buffer to the pool and update the 'busy' flag on the 5112 * previous 'tail' entry. 5113 * 5114 * This _must_ only be called when the buffer is involved in a completed 5115 * TX. The logic is that if it was part of an active TX, the previous 5116 * buffer on the list is now not involved in a halted TX DMA queue, waiting 5117 * for restart (eg for TDMA.) 5118 * 5119 * The caller must free the mbuf and recycle the node reference. 5120 * 5121 * XXX This method of handling busy / holding buffers is insanely stupid. 5122 * It requires bf_state.bfs_tx_queue to be correctly assigned. It would 5123 * be much nicer if buffers in the processq() methods would instead be 5124 * always completed there (pushed onto a txq or ath_bufhead) so we knew 5125 * exactly what hardware queue they came from in the first place. 5126 */ 5127 void 5128 ath_freebuf(struct ath_softc *sc, struct ath_buf *bf) 5129 { 5130 struct ath_txq *txq; 5131 5132 txq = &sc->sc_txq[bf->bf_state.bfs_tx_queue]; 5133 5134 KASSERT((bf->bf_node == NULL), ("%s: bf->bf_node != NULL\n", __func__)); 5135 KASSERT((bf->bf_m == NULL), ("%s: bf->bf_m != NULL\n", __func__)); 5136 5137 /* 5138 * If this buffer is busy, push it onto the holding queue. 5139 */ 5140 if (bf->bf_flags & ATH_BUF_BUSY) { 5141 ATH_TXQ_LOCK(txq); 5142 ath_txq_addholdingbuf(sc, bf); 5143 ATH_TXQ_UNLOCK(txq); 5144 return; 5145 } 5146 5147 /* 5148 * Not a busy buffer, so free normally 5149 */ 5150 ATH_TXBUF_LOCK(sc); 5151 ath_returnbuf_tail(sc, bf); 5152 ATH_TXBUF_UNLOCK(sc); 5153 } 5154 5155 /* 5156 * This is currently used by ath_tx_draintxq() and 5157 * ath_tx_tid_free_pkts(). 5158 * 5159 * It recycles a single ath_buf. 5160 */ 5161 void 5162 ath_tx_freebuf(struct ath_softc *sc, struct ath_buf *bf, int status) 5163 { 5164 struct ieee80211_node *ni = bf->bf_node; 5165 struct mbuf *m0 = bf->bf_m; 5166 5167 /* 5168 * Make sure that we only sync/unload if there's an mbuf. 5169 * If not (eg we cloned a buffer), the unload will have already 5170 * occured. 5171 */ 5172 if (bf->bf_m != NULL) { 5173 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 5174 BUS_DMASYNC_POSTWRITE); 5175 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 5176 } 5177 5178 bf->bf_node = NULL; 5179 bf->bf_m = NULL; 5180 5181 /* Free the buffer, it's not needed any longer */ 5182 ath_freebuf(sc, bf); 5183 5184 /* Pass the buffer back to net80211 - completing it */ 5185 ieee80211_tx_complete(ni, m0, status); 5186 } 5187 5188 static struct ath_buf * 5189 ath_tx_draintxq_get_one(struct ath_softc *sc, struct ath_txq *txq) 5190 { 5191 struct ath_buf *bf; 5192 5193 ATH_TXQ_LOCK_ASSERT(txq); 5194 5195 /* 5196 * Drain the FIFO queue first, then if it's 5197 * empty, move to the normal frame queue. 5198 */ 5199 bf = TAILQ_FIRST(&txq->fifo.axq_q); 5200 if (bf != NULL) { 5201 /* 5202 * Is it the last buffer in this set? 5203 * Decrement the FIFO counter. 5204 */ 5205 if (bf->bf_flags & ATH_BUF_FIFOEND) { 5206 if (txq->axq_fifo_depth == 0) { 5207 device_printf(sc->sc_dev, 5208 "%s: Q%d: fifo_depth=0, fifo.axq_depth=%d?\n", 5209 __func__, 5210 txq->axq_qnum, 5211 txq->fifo.axq_depth); 5212 } else 5213 txq->axq_fifo_depth--; 5214 } 5215 ATH_TXQ_REMOVE(&txq->fifo, bf, bf_list); 5216 return (bf); 5217 } 5218 5219 /* 5220 * Debugging! 5221 */ 5222 if (txq->axq_fifo_depth != 0 || txq->fifo.axq_depth != 0) { 5223 device_printf(sc->sc_dev, 5224 "%s: Q%d: fifo_depth=%d, fifo.axq_depth=%d\n", 5225 __func__, 5226 txq->axq_qnum, 5227 txq->axq_fifo_depth, 5228 txq->fifo.axq_depth); 5229 } 5230 5231 /* 5232 * Now drain the pending queue. 5233 */ 5234 bf = TAILQ_FIRST(&txq->axq_q); 5235 if (bf == NULL) { 5236 txq->axq_link = NULL; 5237 return (NULL); 5238 } 5239 ATH_TXQ_REMOVE(txq, bf, bf_list); 5240 return (bf); 5241 } 5242 5243 void 5244 ath_tx_draintxq(struct ath_softc *sc, struct ath_txq *txq) 5245 { 5246 #ifdef ATH_DEBUG 5247 struct ath_hal *ah = sc->sc_ah; 5248 #endif 5249 struct ath_buf *bf; 5250 u_int ix; 5251 5252 /* 5253 * NB: this assumes output has been stopped and 5254 * we do not need to block ath_tx_proc 5255 */ 5256 for (ix = 0;; ix++) { 5257 ATH_TXQ_LOCK(txq); 5258 bf = ath_tx_draintxq_get_one(sc, txq); 5259 if (bf == NULL) { 5260 ATH_TXQ_UNLOCK(txq); 5261 break; 5262 } 5263 if (bf->bf_state.bfs_aggr) 5264 txq->axq_aggr_depth--; 5265 #ifdef ATH_DEBUG 5266 if (sc->sc_debug & ATH_DEBUG_RESET) { 5267 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 5268 int status = 0; 5269 5270 /* 5271 * EDMA operation has a TX completion FIFO 5272 * separate from the TX descriptor, so this 5273 * method of checking the "completion" status 5274 * is wrong. 5275 */ 5276 if (! sc->sc_isedma) { 5277 status = (ath_hal_txprocdesc(ah, 5278 bf->bf_lastds, 5279 &bf->bf_status.ds_txstat) == HAL_OK); 5280 } 5281 ath_printtxbuf(sc, bf, txq->axq_qnum, ix, status); 5282 ieee80211_dump_pkt(ic, mtod(bf->bf_m, const uint8_t *), 5283 bf->bf_m->m_len, 0, -1); 5284 } 5285 #endif /* ATH_DEBUG */ 5286 /* 5287 * Since we're now doing magic in the completion 5288 * functions, we -must- call it for aggregation 5289 * destinations or BAW tracking will get upset. 5290 */ 5291 /* 5292 * Clear ATH_BUF_BUSY; the completion handler 5293 * will free the buffer. 5294 */ 5295 ATH_TXQ_UNLOCK(txq); 5296 bf->bf_flags &= ~ATH_BUF_BUSY; 5297 if (bf->bf_comp) 5298 bf->bf_comp(sc, bf, 1); 5299 else 5300 ath_tx_default_comp(sc, bf, 1); 5301 } 5302 5303 /* 5304 * Free the holding buffer if it exists 5305 */ 5306 ATH_TXQ_LOCK(txq); 5307 ath_txq_freeholdingbuf(sc, txq); 5308 ATH_TXQ_UNLOCK(txq); 5309 5310 /* 5311 * Drain software queued frames which are on 5312 * active TIDs. 5313 */ 5314 ath_tx_txq_drain(sc, txq); 5315 } 5316 5317 static void 5318 ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq) 5319 { 5320 struct ath_hal *ah = sc->sc_ah; 5321 5322 ATH_TXQ_LOCK_ASSERT(txq); 5323 5324 DPRINTF(sc, ATH_DEBUG_RESET, 5325 "%s: tx queue [%u] %p, active=%d, hwpending=%d, flags 0x%08x, " 5326 "link %p, holdingbf=%p\n", 5327 __func__, 5328 txq->axq_qnum, 5329 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, txq->axq_qnum), 5330 (int) (!! ath_hal_txqenabled(ah, txq->axq_qnum)), 5331 (int) ath_hal_numtxpending(ah, txq->axq_qnum), 5332 txq->axq_flags, 5333 txq->axq_link, 5334 txq->axq_holdingbf); 5335 5336 (void) ath_hal_stoptxdma(ah, txq->axq_qnum); 5337 /* We've stopped TX DMA, so mark this as stopped. */ 5338 txq->axq_flags &= ~ATH_TXQ_PUTRUNNING; 5339 5340 #ifdef ATH_DEBUG 5341 if ((sc->sc_debug & ATH_DEBUG_RESET) 5342 && (txq->axq_holdingbf != NULL)) { 5343 ath_printtxbuf(sc, txq->axq_holdingbf, txq->axq_qnum, 0, 0); 5344 } 5345 #endif 5346 } 5347 5348 int 5349 ath_stoptxdma(struct ath_softc *sc) 5350 { 5351 struct ath_hal *ah = sc->sc_ah; 5352 int i; 5353 5354 /* XXX return value */ 5355 if (sc->sc_invalid) 5356 return 0; 5357 5358 if (!sc->sc_invalid) { 5359 /* don't touch the hardware if marked invalid */ 5360 DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n", 5361 __func__, sc->sc_bhalq, 5362 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, sc->sc_bhalq), 5363 NULL); 5364 5365 /* stop the beacon queue */ 5366 (void) ath_hal_stoptxdma(ah, sc->sc_bhalq); 5367 5368 /* Stop the data queues */ 5369 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { 5370 if (ATH_TXQ_SETUP(sc, i)) { 5371 ATH_TXQ_LOCK(&sc->sc_txq[i]); 5372 ath_tx_stopdma(sc, &sc->sc_txq[i]); 5373 ATH_TXQ_UNLOCK(&sc->sc_txq[i]); 5374 } 5375 } 5376 } 5377 5378 return 1; 5379 } 5380 5381 #ifdef ATH_DEBUG 5382 void 5383 ath_tx_dump(struct ath_softc *sc, struct ath_txq *txq) 5384 { 5385 struct ath_hal *ah = sc->sc_ah; 5386 struct ath_buf *bf; 5387 int i = 0; 5388 5389 if (! (sc->sc_debug & ATH_DEBUG_RESET)) 5390 return; 5391 5392 device_printf(sc->sc_dev, "%s: Q%d: begin\n", 5393 __func__, txq->axq_qnum); 5394 TAILQ_FOREACH(bf, &txq->axq_q, bf_list) { 5395 ath_printtxbuf(sc, bf, txq->axq_qnum, i, 5396 ath_hal_txprocdesc(ah, bf->bf_lastds, 5397 &bf->bf_status.ds_txstat) == HAL_OK); 5398 i++; 5399 } 5400 device_printf(sc->sc_dev, "%s: Q%d: end\n", 5401 __func__, txq->axq_qnum); 5402 } 5403 #endif /* ATH_DEBUG */ 5404 5405 /* 5406 * Drain the transmit queues and reclaim resources. 5407 */ 5408 void 5409 ath_legacy_tx_drain(struct ath_softc *sc, ATH_RESET_TYPE reset_type) 5410 { 5411 struct ath_hal *ah = sc->sc_ah; 5412 struct ifnet *ifp = sc->sc_ifp; 5413 int i; 5414 struct ath_buf *bf_last; 5415 5416 (void) ath_stoptxdma(sc); 5417 5418 /* 5419 * Dump the queue contents 5420 */ 5421 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { 5422 /* 5423 * XXX TODO: should we just handle the completed TX frames 5424 * here, whether or not the reset is a full one or not? 5425 */ 5426 if (ATH_TXQ_SETUP(sc, i)) { 5427 #ifdef ATH_DEBUG 5428 if (sc->sc_debug & ATH_DEBUG_RESET) 5429 ath_tx_dump(sc, &sc->sc_txq[i]); 5430 #endif /* ATH_DEBUG */ 5431 if (reset_type == ATH_RESET_NOLOSS) { 5432 ath_tx_processq(sc, &sc->sc_txq[i], 0); 5433 ATH_TXQ_LOCK(&sc->sc_txq[i]); 5434 /* 5435 * Free the holding buffer; DMA is now 5436 * stopped. 5437 */ 5438 ath_txq_freeholdingbuf(sc, &sc->sc_txq[i]); 5439 /* 5440 * Setup the link pointer to be the 5441 * _last_ buffer/descriptor in the list. 5442 * If there's nothing in the list, set it 5443 * to NULL. 5444 */ 5445 bf_last = ATH_TXQ_LAST(&sc->sc_txq[i], 5446 axq_q_s); 5447 if (bf_last != NULL) { 5448 ath_hal_gettxdesclinkptr(ah, 5449 bf_last->bf_lastds, 5450 &sc->sc_txq[i].axq_link); 5451 } else { 5452 sc->sc_txq[i].axq_link = NULL; 5453 } 5454 ATH_TXQ_UNLOCK(&sc->sc_txq[i]); 5455 } else 5456 ath_tx_draintxq(sc, &sc->sc_txq[i]); 5457 } 5458 } 5459 #ifdef ATH_DEBUG 5460 if (sc->sc_debug & ATH_DEBUG_RESET) { 5461 struct ath_buf *bf = TAILQ_FIRST(&sc->sc_bbuf); 5462 if (bf != NULL && bf->bf_m != NULL) { 5463 ath_printtxbuf(sc, bf, sc->sc_bhalq, 0, 5464 ath_hal_txprocdesc(ah, bf->bf_lastds, 5465 &bf->bf_status.ds_txstat) == HAL_OK); 5466 ieee80211_dump_pkt(ifp->if_l2com, 5467 mtod(bf->bf_m, const uint8_t *), bf->bf_m->m_len, 5468 0, -1); 5469 } 5470 } 5471 #endif /* ATH_DEBUG */ 5472 IF_LOCK(&ifp->if_snd); 5473 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 5474 IF_UNLOCK(&ifp->if_snd); 5475 sc->sc_wd_timer = 0; 5476 } 5477 5478 /* 5479 * Update internal state after a channel change. 5480 */ 5481 static void 5482 ath_chan_change(struct ath_softc *sc, struct ieee80211_channel *chan) 5483 { 5484 enum ieee80211_phymode mode; 5485 5486 /* 5487 * Change channels and update the h/w rate map 5488 * if we're switching; e.g. 11a to 11b/g. 5489 */ 5490 mode = ieee80211_chan2mode(chan); 5491 if (mode != sc->sc_curmode) 5492 ath_setcurmode(sc, mode); 5493 sc->sc_curchan = chan; 5494 } 5495 5496 /* 5497 * Set/change channels. If the channel is really being changed, 5498 * it's done by resetting the chip. To accomplish this we must 5499 * first cleanup any pending DMA, then restart stuff after a la 5500 * ath_init. 5501 */ 5502 static int 5503 ath_chan_set(struct ath_softc *sc, struct ieee80211_channel *chan) 5504 { 5505 struct ifnet *ifp = sc->sc_ifp; 5506 struct ieee80211com *ic = ifp->if_l2com; 5507 struct ath_hal *ah = sc->sc_ah; 5508 int ret = 0; 5509 5510 /* Treat this as an interface reset */ 5511 ATH_PCU_UNLOCK_ASSERT(sc); 5512 ATH_UNLOCK_ASSERT(sc); 5513 5514 /* (Try to) stop TX/RX from occuring */ 5515 taskqueue_block(sc->sc_tq); 5516 5517 ATH_PCU_LOCK(sc); 5518 5519 /* Disable interrupts */ 5520 ath_hal_intrset(ah, 0); 5521 5522 /* Stop new RX/TX/interrupt completion */ 5523 if (ath_reset_grablock(sc, 1) == 0) { 5524 device_printf(sc->sc_dev, "%s: concurrent reset! Danger!\n", 5525 __func__); 5526 } 5527 5528 /* Stop pending RX/TX completion */ 5529 ath_txrx_stop_locked(sc); 5530 5531 ATH_PCU_UNLOCK(sc); 5532 5533 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %u (%u MHz, flags 0x%x)\n", 5534 __func__, ieee80211_chan2ieee(ic, chan), 5535 chan->ic_freq, chan->ic_flags); 5536 if (chan != sc->sc_curchan) { 5537 HAL_STATUS status; 5538 /* 5539 * To switch channels clear any pending DMA operations; 5540 * wait long enough for the RX fifo to drain, reset the 5541 * hardware at the new frequency, and then re-enable 5542 * the relevant bits of the h/w. 5543 */ 5544 #if 0 5545 ath_hal_intrset(ah, 0); /* disable interrupts */ 5546 #endif 5547 ath_stoprecv(sc, 1); /* turn off frame recv */ 5548 /* 5549 * First, handle completed TX/RX frames. 5550 */ 5551 ath_rx_flush(sc); 5552 ath_draintxq(sc, ATH_RESET_NOLOSS); 5553 /* 5554 * Next, flush the non-scheduled frames. 5555 */ 5556 ath_draintxq(sc, ATH_RESET_FULL); /* clear pending tx frames */ 5557 5558 ath_update_chainmasks(sc, chan); 5559 ath_hal_setchainmasks(sc->sc_ah, sc->sc_cur_txchainmask, 5560 sc->sc_cur_rxchainmask); 5561 if (!ath_hal_reset(ah, sc->sc_opmode, chan, AH_TRUE, &status)) { 5562 if_printf(ifp, "%s: unable to reset " 5563 "channel %u (%u MHz, flags 0x%x), hal status %u\n", 5564 __func__, ieee80211_chan2ieee(ic, chan), 5565 chan->ic_freq, chan->ic_flags, status); 5566 ret = EIO; 5567 goto finish; 5568 } 5569 sc->sc_diversity = ath_hal_getdiversity(ah); 5570 5571 ATH_RX_LOCK(sc); 5572 sc->sc_rx_stopped = 1; 5573 sc->sc_rx_resetted = 1; 5574 ATH_RX_UNLOCK(sc); 5575 5576 /* Let DFS at it in case it's a DFS channel */ 5577 ath_dfs_radar_enable(sc, chan); 5578 5579 /* Let spectral at in case spectral is enabled */ 5580 ath_spectral_enable(sc, chan); 5581 5582 /* 5583 * Let bluetooth coexistence at in case it's needed for this 5584 * channel 5585 */ 5586 ath_btcoex_enable(sc, ic->ic_curchan); 5587 5588 /* 5589 * If we're doing TDMA, enforce the TXOP limitation for chips 5590 * that support it. 5591 */ 5592 if (sc->sc_hasenforcetxop && sc->sc_tdma) 5593 ath_hal_setenforcetxop(sc->sc_ah, 1); 5594 else 5595 ath_hal_setenforcetxop(sc->sc_ah, 0); 5596 5597 /* 5598 * Re-enable rx framework. 5599 */ 5600 if (ath_startrecv(sc) != 0) { 5601 if_printf(ifp, "%s: unable to restart recv logic\n", 5602 __func__); 5603 ret = EIO; 5604 goto finish; 5605 } 5606 5607 /* 5608 * Change channels and update the h/w rate map 5609 * if we're switching; e.g. 11a to 11b/g. 5610 */ 5611 ath_chan_change(sc, chan); 5612 5613 /* 5614 * Reset clears the beacon timers; reset them 5615 * here if needed. 5616 */ 5617 if (sc->sc_beacons) { /* restart beacons */ 5618 #ifdef IEEE80211_SUPPORT_TDMA 5619 if (sc->sc_tdma) 5620 ath_tdma_config(sc, NULL); 5621 else 5622 #endif 5623 ath_beacon_config(sc, NULL); 5624 } 5625 5626 /* 5627 * Re-enable interrupts. 5628 */ 5629 #if 0 5630 ath_hal_intrset(ah, sc->sc_imask); 5631 #endif 5632 } 5633 5634 finish: 5635 ATH_PCU_LOCK(sc); 5636 sc->sc_inreset_cnt--; 5637 /* XXX only do this if sc_inreset_cnt == 0? */ 5638 ath_hal_intrset(ah, sc->sc_imask); 5639 ATH_PCU_UNLOCK(sc); 5640 5641 IF_LOCK(&ifp->if_snd); 5642 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 5643 IF_UNLOCK(&ifp->if_snd); 5644 ath_txrx_start(sc); 5645 /* XXX ath_start? */ 5646 5647 return ret; 5648 } 5649 5650 /* 5651 * Periodically recalibrate the PHY to account 5652 * for temperature/environment changes. 5653 */ 5654 static void 5655 ath_calibrate(void *arg) 5656 { 5657 struct ath_softc *sc = arg; 5658 struct ath_hal *ah = sc->sc_ah; 5659 struct ifnet *ifp = sc->sc_ifp; 5660 struct ieee80211com *ic = ifp->if_l2com; 5661 HAL_BOOL longCal, isCalDone = AH_TRUE; 5662 HAL_BOOL aniCal, shortCal = AH_FALSE; 5663 int nextcal; 5664 5665 ATH_LOCK_ASSERT(sc); 5666 5667 /* 5668 * Force the hardware awake for ANI work. 5669 */ 5670 ath_power_set_power_state(sc, HAL_PM_AWAKE); 5671 5672 /* Skip trying to do this if we're in reset */ 5673 if (sc->sc_inreset_cnt) 5674 goto restart; 5675 5676 if (ic->ic_flags & IEEE80211_F_SCAN) /* defer, off channel */ 5677 goto restart; 5678 longCal = (ticks - sc->sc_lastlongcal >= ath_longcalinterval*hz); 5679 aniCal = (ticks - sc->sc_lastani >= ath_anicalinterval*hz/1000); 5680 if (sc->sc_doresetcal) 5681 shortCal = (ticks - sc->sc_lastshortcal >= ath_shortcalinterval*hz/1000); 5682 5683 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: shortCal=%d; longCal=%d; aniCal=%d\n", __func__, shortCal, longCal, aniCal); 5684 if (aniCal) { 5685 sc->sc_stats.ast_ani_cal++; 5686 sc->sc_lastani = ticks; 5687 ath_hal_ani_poll(ah, sc->sc_curchan); 5688 } 5689 5690 if (longCal) { 5691 sc->sc_stats.ast_per_cal++; 5692 sc->sc_lastlongcal = ticks; 5693 if (ath_hal_getrfgain(ah) == HAL_RFGAIN_NEED_CHANGE) { 5694 /* 5695 * Rfgain is out of bounds, reset the chip 5696 * to load new gain values. 5697 */ 5698 DPRINTF(sc, ATH_DEBUG_CALIBRATE, 5699 "%s: rfgain change\n", __func__); 5700 sc->sc_stats.ast_per_rfgain++; 5701 sc->sc_resetcal = 0; 5702 sc->sc_doresetcal = AH_TRUE; 5703 taskqueue_enqueue(sc->sc_tq, &sc->sc_resettask); 5704 callout_reset(&sc->sc_cal_ch, 1, ath_calibrate, sc); 5705 ath_power_restore_power_state(sc); 5706 return; 5707 } 5708 /* 5709 * If this long cal is after an idle period, then 5710 * reset the data collection state so we start fresh. 5711 */ 5712 if (sc->sc_resetcal) { 5713 (void) ath_hal_calreset(ah, sc->sc_curchan); 5714 sc->sc_lastcalreset = ticks; 5715 sc->sc_lastshortcal = ticks; 5716 sc->sc_resetcal = 0; 5717 sc->sc_doresetcal = AH_TRUE; 5718 } 5719 } 5720 5721 /* Only call if we're doing a short/long cal, not for ANI calibration */ 5722 if (shortCal || longCal) { 5723 isCalDone = AH_FALSE; 5724 if (ath_hal_calibrateN(ah, sc->sc_curchan, longCal, &isCalDone)) { 5725 if (longCal) { 5726 /* 5727 * Calibrate noise floor data again in case of change. 5728 */ 5729 ath_hal_process_noisefloor(ah); 5730 } 5731 } else { 5732 DPRINTF(sc, ATH_DEBUG_ANY, 5733 "%s: calibration of channel %u failed\n", 5734 __func__, sc->sc_curchan->ic_freq); 5735 sc->sc_stats.ast_per_calfail++; 5736 } 5737 if (shortCal) 5738 sc->sc_lastshortcal = ticks; 5739 } 5740 if (!isCalDone) { 5741 restart: 5742 /* 5743 * Use a shorter interval to potentially collect multiple 5744 * data samples required to complete calibration. Once 5745 * we're told the work is done we drop back to a longer 5746 * interval between requests. We're more aggressive doing 5747 * work when operating as an AP to improve operation right 5748 * after startup. 5749 */ 5750 sc->sc_lastshortcal = ticks; 5751 nextcal = ath_shortcalinterval*hz/1000; 5752 if (sc->sc_opmode != HAL_M_HOSTAP) 5753 nextcal *= 10; 5754 sc->sc_doresetcal = AH_TRUE; 5755 } else { 5756 /* nextcal should be the shortest time for next event */ 5757 nextcal = ath_longcalinterval*hz; 5758 if (sc->sc_lastcalreset == 0) 5759 sc->sc_lastcalreset = sc->sc_lastlongcal; 5760 else if (ticks - sc->sc_lastcalreset >= ath_resetcalinterval*hz) 5761 sc->sc_resetcal = 1; /* setup reset next trip */ 5762 sc->sc_doresetcal = AH_FALSE; 5763 } 5764 /* ANI calibration may occur more often than short/long/resetcal */ 5765 if (ath_anicalinterval > 0) 5766 nextcal = MIN(nextcal, ath_anicalinterval*hz/1000); 5767 5768 if (nextcal != 0) { 5769 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: next +%u (%sisCalDone)\n", 5770 __func__, nextcal, isCalDone ? "" : "!"); 5771 callout_reset(&sc->sc_cal_ch, nextcal, ath_calibrate, sc); 5772 } else { 5773 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: calibration disabled\n", 5774 __func__); 5775 /* NB: don't rearm timer */ 5776 } 5777 /* 5778 * Restore power state now that we're done. 5779 */ 5780 ath_power_restore_power_state(sc); 5781 } 5782 5783 static void 5784 ath_scan_start(struct ieee80211com *ic) 5785 { 5786 struct ifnet *ifp = ic->ic_ifp; 5787 struct ath_softc *sc = ifp->if_softc; 5788 struct ath_hal *ah = sc->sc_ah; 5789 u_int32_t rfilt; 5790 5791 /* XXX calibration timer? */ 5792 5793 ATH_LOCK(sc); 5794 sc->sc_scanning = 1; 5795 sc->sc_syncbeacon = 0; 5796 rfilt = ath_calcrxfilter(sc); 5797 ATH_UNLOCK(sc); 5798 5799 ATH_PCU_LOCK(sc); 5800 ath_hal_setrxfilter(ah, rfilt); 5801 ath_hal_setassocid(ah, ifp->if_broadcastaddr, 0); 5802 ATH_PCU_UNLOCK(sc); 5803 5804 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0\n", 5805 __func__, rfilt, ether_sprintf(ifp->if_broadcastaddr)); 5806 } 5807 5808 static void 5809 ath_scan_end(struct ieee80211com *ic) 5810 { 5811 struct ifnet *ifp = ic->ic_ifp; 5812 struct ath_softc *sc = ifp->if_softc; 5813 struct ath_hal *ah = sc->sc_ah; 5814 u_int32_t rfilt; 5815 5816 ATH_LOCK(sc); 5817 sc->sc_scanning = 0; 5818 rfilt = ath_calcrxfilter(sc); 5819 ATH_UNLOCK(sc); 5820 5821 ATH_PCU_LOCK(sc); 5822 ath_hal_setrxfilter(ah, rfilt); 5823 ath_hal_setassocid(ah, sc->sc_curbssid, sc->sc_curaid); 5824 5825 ath_hal_process_noisefloor(ah); 5826 ATH_PCU_UNLOCK(sc); 5827 5828 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0x%x\n", 5829 __func__, rfilt, ether_sprintf(sc->sc_curbssid), 5830 sc->sc_curaid); 5831 } 5832 5833 #ifdef ATH_ENABLE_11N 5834 /* 5835 * For now, just do a channel change. 5836 * 5837 * Later, we'll go through the hard slog of suspending tx/rx, changing rate 5838 * control state and resetting the hardware without dropping frames out 5839 * of the queue. 5840 * 5841 * The unfortunate trouble here is making absolutely sure that the 5842 * channel width change has propagated enough so the hardware 5843 * absolutely isn't handed bogus frames for it's current operating 5844 * mode. (Eg, 40MHz frames in 20MHz mode.) Since TX and RX can and 5845 * does occur in parallel, we need to make certain we've blocked 5846 * any further ongoing TX (and RX, that can cause raw TX) 5847 * before we do this. 5848 */ 5849 static void 5850 ath_update_chw(struct ieee80211com *ic) 5851 { 5852 struct ifnet *ifp = ic->ic_ifp; 5853 struct ath_softc *sc = ifp->if_softc; 5854 5855 DPRINTF(sc, ATH_DEBUG_STATE, "%s: called\n", __func__); 5856 ath_set_channel(ic); 5857 } 5858 #endif /* ATH_ENABLE_11N */ 5859 5860 static void 5861 ath_set_channel(struct ieee80211com *ic) 5862 { 5863 struct ifnet *ifp = ic->ic_ifp; 5864 struct ath_softc *sc = ifp->if_softc; 5865 5866 ATH_LOCK(sc); 5867 ath_power_set_power_state(sc, HAL_PM_AWAKE); 5868 ATH_UNLOCK(sc); 5869 5870 (void) ath_chan_set(sc, ic->ic_curchan); 5871 /* 5872 * If we are returning to our bss channel then mark state 5873 * so the next recv'd beacon's tsf will be used to sync the 5874 * beacon timers. Note that since we only hear beacons in 5875 * sta/ibss mode this has no effect in other operating modes. 5876 */ 5877 ATH_LOCK(sc); 5878 if (!sc->sc_scanning && ic->ic_curchan == ic->ic_bsschan) 5879 sc->sc_syncbeacon = 1; 5880 ath_power_restore_power_state(sc); 5881 ATH_UNLOCK(sc); 5882 } 5883 5884 /* 5885 * Walk the vap list and check if there any vap's in RUN state. 5886 */ 5887 static int 5888 ath_isanyrunningvaps(struct ieee80211vap *this) 5889 { 5890 struct ieee80211com *ic = this->iv_ic; 5891 struct ieee80211vap *vap; 5892 5893 IEEE80211_LOCK_ASSERT(ic); 5894 5895 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 5896 if (vap != this && vap->iv_state >= IEEE80211_S_RUN) 5897 return 1; 5898 } 5899 return 0; 5900 } 5901 5902 static int 5903 ath_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 5904 { 5905 struct ieee80211com *ic = vap->iv_ic; 5906 struct ath_softc *sc = ic->ic_ifp->if_softc; 5907 struct ath_vap *avp = ATH_VAP(vap); 5908 struct ath_hal *ah = sc->sc_ah; 5909 struct ieee80211_node *ni = NULL; 5910 int i, error, stamode; 5911 u_int32_t rfilt; 5912 int csa_run_transition = 0; 5913 enum ieee80211_state ostate = vap->iv_state; 5914 5915 static const HAL_LED_STATE leds[] = { 5916 HAL_LED_INIT, /* IEEE80211_S_INIT */ 5917 HAL_LED_SCAN, /* IEEE80211_S_SCAN */ 5918 HAL_LED_AUTH, /* IEEE80211_S_AUTH */ 5919 HAL_LED_ASSOC, /* IEEE80211_S_ASSOC */ 5920 HAL_LED_RUN, /* IEEE80211_S_CAC */ 5921 HAL_LED_RUN, /* IEEE80211_S_RUN */ 5922 HAL_LED_RUN, /* IEEE80211_S_CSA */ 5923 HAL_LED_RUN, /* IEEE80211_S_SLEEP */ 5924 }; 5925 5926 DPRINTF(sc, ATH_DEBUG_STATE, "%s: %s -> %s\n", __func__, 5927 ieee80211_state_name[ostate], 5928 ieee80211_state_name[nstate]); 5929 5930 /* 5931 * net80211 _should_ have the comlock asserted at this point. 5932 * There are some comments around the calls to vap->iv_newstate 5933 * which indicate that it (newstate) may end up dropping the 5934 * lock. This and the subsequent lock assert check after newstate 5935 * are an attempt to catch these and figure out how/why. 5936 */ 5937 IEEE80211_LOCK_ASSERT(ic); 5938 5939 /* Before we touch the hardware - wake it up */ 5940 ATH_LOCK(sc); 5941 /* 5942 * If the NIC is in anything other than SLEEP state, 5943 * we need to ensure that self-generated frames are 5944 * set for PWRMGT=0. Otherwise we may end up with 5945 * strange situations. 5946 * 5947 * XXX TODO: is this actually the case? :-) 5948 */ 5949 if (nstate != IEEE80211_S_SLEEP) 5950 ath_power_setselfgen(sc, HAL_PM_AWAKE); 5951 5952 /* 5953 * Now, wake the thing up. 5954 */ 5955 ath_power_set_power_state(sc, HAL_PM_AWAKE); 5956 5957 /* 5958 * And stop the calibration callout whilst we have 5959 * ATH_LOCK held. 5960 */ 5961 callout_stop(&sc->sc_cal_ch); 5962 ATH_UNLOCK(sc); 5963 5964 if (ostate == IEEE80211_S_CSA && nstate == IEEE80211_S_RUN) 5965 csa_run_transition = 1; 5966 5967 ath_hal_setledstate(ah, leds[nstate]); /* set LED */ 5968 5969 if (nstate == IEEE80211_S_SCAN) { 5970 /* 5971 * Scanning: turn off beacon miss and don't beacon. 5972 * Mark beacon state so when we reach RUN state we'll 5973 * [re]setup beacons. Unblock the task q thread so 5974 * deferred interrupt processing is done. 5975 */ 5976 5977 /* Ensure we stay awake during scan */ 5978 ATH_LOCK(sc); 5979 ath_power_setselfgen(sc, HAL_PM_AWAKE); 5980 ath_power_setpower(sc, HAL_PM_AWAKE); 5981 ATH_UNLOCK(sc); 5982 5983 ath_hal_intrset(ah, 5984 sc->sc_imask &~ (HAL_INT_SWBA | HAL_INT_BMISS)); 5985 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 5986 sc->sc_beacons = 0; 5987 taskqueue_unblock(sc->sc_tq); 5988 } 5989 5990 ni = ieee80211_ref_node(vap->iv_bss); 5991 rfilt = ath_calcrxfilter(sc); 5992 stamode = (vap->iv_opmode == IEEE80211_M_STA || 5993 vap->iv_opmode == IEEE80211_M_AHDEMO || 5994 vap->iv_opmode == IEEE80211_M_IBSS); 5995 5996 /* 5997 * XXX Dont need to do this (and others) if we've transitioned 5998 * from SLEEP->RUN. 5999 */ 6000 if (stamode && nstate == IEEE80211_S_RUN) { 6001 sc->sc_curaid = ni->ni_associd; 6002 IEEE80211_ADDR_COPY(sc->sc_curbssid, ni->ni_bssid); 6003 ath_hal_setassocid(ah, sc->sc_curbssid, sc->sc_curaid); 6004 } 6005 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0x%x\n", 6006 __func__, rfilt, ether_sprintf(sc->sc_curbssid), sc->sc_curaid); 6007 ath_hal_setrxfilter(ah, rfilt); 6008 6009 /* XXX is this to restore keycache on resume? */ 6010 if (vap->iv_opmode != IEEE80211_M_STA && 6011 (vap->iv_flags & IEEE80211_F_PRIVACY)) { 6012 for (i = 0; i < IEEE80211_WEP_NKID; i++) 6013 if (ath_hal_keyisvalid(ah, i)) 6014 ath_hal_keysetmac(ah, i, ni->ni_bssid); 6015 } 6016 6017 /* 6018 * Invoke the parent method to do net80211 work. 6019 */ 6020 error = avp->av_newstate(vap, nstate, arg); 6021 if (error != 0) 6022 goto bad; 6023 6024 /* 6025 * See above: ensure av_newstate() doesn't drop the lock 6026 * on us. 6027 */ 6028 IEEE80211_LOCK_ASSERT(ic); 6029 6030 if (nstate == IEEE80211_S_RUN) { 6031 /* NB: collect bss node again, it may have changed */ 6032 ieee80211_free_node(ni); 6033 ni = ieee80211_ref_node(vap->iv_bss); 6034 6035 DPRINTF(sc, ATH_DEBUG_STATE, 6036 "%s(RUN): iv_flags 0x%08x bintvl %d bssid %s " 6037 "capinfo 0x%04x chan %d\n", __func__, 6038 vap->iv_flags, ni->ni_intval, ether_sprintf(ni->ni_bssid), 6039 ni->ni_capinfo, ieee80211_chan2ieee(ic, ic->ic_curchan)); 6040 6041 switch (vap->iv_opmode) { 6042 #ifdef IEEE80211_SUPPORT_TDMA 6043 case IEEE80211_M_AHDEMO: 6044 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 6045 break; 6046 /* fall thru... */ 6047 #endif 6048 case IEEE80211_M_HOSTAP: 6049 case IEEE80211_M_IBSS: 6050 case IEEE80211_M_MBSS: 6051 /* 6052 * Allocate and setup the beacon frame. 6053 * 6054 * Stop any previous beacon DMA. This may be 6055 * necessary, for example, when an ibss merge 6056 * causes reconfiguration; there will be a state 6057 * transition from RUN->RUN that means we may 6058 * be called with beacon transmission active. 6059 */ 6060 ath_hal_stoptxdma(ah, sc->sc_bhalq); 6061 6062 error = ath_beacon_alloc(sc, ni); 6063 if (error != 0) 6064 goto bad; 6065 /* 6066 * If joining an adhoc network defer beacon timer 6067 * configuration to the next beacon frame so we 6068 * have a current TSF to use. Otherwise we're 6069 * starting an ibss/bss so there's no need to delay; 6070 * if this is the first vap moving to RUN state, then 6071 * beacon state needs to be [re]configured. 6072 */ 6073 if (vap->iv_opmode == IEEE80211_M_IBSS && 6074 ni->ni_tstamp.tsf != 0) { 6075 sc->sc_syncbeacon = 1; 6076 } else if (!sc->sc_beacons) { 6077 #ifdef IEEE80211_SUPPORT_TDMA 6078 if (vap->iv_caps & IEEE80211_C_TDMA) 6079 ath_tdma_config(sc, vap); 6080 else 6081 #endif 6082 ath_beacon_config(sc, vap); 6083 sc->sc_beacons = 1; 6084 } 6085 break; 6086 case IEEE80211_M_STA: 6087 /* 6088 * Defer beacon timer configuration to the next 6089 * beacon frame so we have a current TSF to use 6090 * (any TSF collected when scanning is likely old). 6091 * However if it's due to a CSA -> RUN transition, 6092 * force a beacon update so we pick up a lack of 6093 * beacons from an AP in CAC and thus force a 6094 * scan. 6095 * 6096 * And, there's also corner cases here where 6097 * after a scan, the AP may have disappeared. 6098 * In that case, we may not receive an actual 6099 * beacon to update the beacon timer and thus we 6100 * won't get notified of the missing beacons. 6101 */ 6102 if (ostate != IEEE80211_S_RUN && 6103 ostate != IEEE80211_S_SLEEP) { 6104 DPRINTF(sc, ATH_DEBUG_BEACON, 6105 "%s: STA; syncbeacon=1\n", __func__); 6106 sc->sc_syncbeacon = 1; 6107 6108 if (csa_run_transition) 6109 ath_beacon_config(sc, vap); 6110 6111 /* 6112 * PR: kern/175227 6113 * 6114 * Reconfigure beacons during reset; as otherwise 6115 * we won't get the beacon timers reprogrammed 6116 * after a reset and thus we won't pick up a 6117 * beacon miss interrupt. 6118 * 6119 * Hopefully we'll see a beacon before the BMISS 6120 * timer fires (too often), leading to a STA 6121 * disassociation. 6122 */ 6123 sc->sc_beacons = 1; 6124 } 6125 break; 6126 case IEEE80211_M_MONITOR: 6127 /* 6128 * Monitor mode vaps have only INIT->RUN and RUN->RUN 6129 * transitions so we must re-enable interrupts here to 6130 * handle the case of a single monitor mode vap. 6131 */ 6132 ath_hal_intrset(ah, sc->sc_imask); 6133 break; 6134 case IEEE80211_M_WDS: 6135 break; 6136 default: 6137 break; 6138 } 6139 /* 6140 * Let the hal process statistics collected during a 6141 * scan so it can provide calibrated noise floor data. 6142 */ 6143 ath_hal_process_noisefloor(ah); 6144 /* 6145 * Reset rssi stats; maybe not the best place... 6146 */ 6147 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER; 6148 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER; 6149 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER; 6150 6151 /* 6152 * Force awake for RUN mode. 6153 */ 6154 ATH_LOCK(sc); 6155 ath_power_setselfgen(sc, HAL_PM_AWAKE); 6156 ath_power_setpower(sc, HAL_PM_AWAKE); 6157 6158 /* 6159 * Finally, start any timers and the task q thread 6160 * (in case we didn't go through SCAN state). 6161 */ 6162 if (ath_longcalinterval != 0) { 6163 /* start periodic recalibration timer */ 6164 callout_reset(&sc->sc_cal_ch, 1, ath_calibrate, sc); 6165 } else { 6166 DPRINTF(sc, ATH_DEBUG_CALIBRATE, 6167 "%s: calibration disabled\n", __func__); 6168 } 6169 ATH_UNLOCK(sc); 6170 6171 taskqueue_unblock(sc->sc_tq); 6172 } else if (nstate == IEEE80211_S_INIT) { 6173 /* 6174 * If there are no vaps left in RUN state then 6175 * shutdown host/driver operation: 6176 * o disable interrupts 6177 * o disable the task queue thread 6178 * o mark beacon processing as stopped 6179 */ 6180 if (!ath_isanyrunningvaps(vap)) { 6181 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 6182 /* disable interrupts */ 6183 ath_hal_intrset(ah, sc->sc_imask &~ HAL_INT_GLOBAL); 6184 taskqueue_block(sc->sc_tq); 6185 sc->sc_beacons = 0; 6186 } 6187 #ifdef IEEE80211_SUPPORT_TDMA 6188 ath_hal_setcca(ah, AH_TRUE); 6189 #endif 6190 } else if (nstate == IEEE80211_S_SLEEP) { 6191 /* We're going to sleep, so transition appropriately */ 6192 /* For now, only do this if we're a single STA vap */ 6193 if (sc->sc_nvaps == 1 && 6194 vap->iv_opmode == IEEE80211_M_STA) { 6195 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: syncbeacon=%d\n", __func__, sc->sc_syncbeacon); 6196 ATH_LOCK(sc); 6197 /* 6198 * Always at least set the self-generated 6199 * frame config to set PWRMGT=1. 6200 */ 6201 ath_power_setselfgen(sc, HAL_PM_NETWORK_SLEEP); 6202 6203 /* 6204 * If we're not syncing beacons, transition 6205 * to NETWORK_SLEEP. 6206 * 6207 * We stay awake if syncbeacon > 0 in case 6208 * we need to listen for some beacons otherwise 6209 * our beacon timer config may be wrong. 6210 */ 6211 if (sc->sc_syncbeacon == 0) { 6212 ath_power_setpower(sc, HAL_PM_NETWORK_SLEEP); 6213 } 6214 ATH_UNLOCK(sc); 6215 } 6216 } 6217 bad: 6218 ieee80211_free_node(ni); 6219 6220 /* 6221 * Restore the power state - either to what it was, or 6222 * to network_sleep if it's alright. 6223 */ 6224 ATH_LOCK(sc); 6225 ath_power_restore_power_state(sc); 6226 ATH_UNLOCK(sc); 6227 return error; 6228 } 6229 6230 /* 6231 * Allocate a key cache slot to the station so we can 6232 * setup a mapping from key index to node. The key cache 6233 * slot is needed for managing antenna state and for 6234 * compression when stations do not use crypto. We do 6235 * it uniliaterally here; if crypto is employed this slot 6236 * will be reassigned. 6237 */ 6238 static void 6239 ath_setup_stationkey(struct ieee80211_node *ni) 6240 { 6241 struct ieee80211vap *vap = ni->ni_vap; 6242 struct ath_softc *sc = vap->iv_ic->ic_ifp->if_softc; 6243 ieee80211_keyix keyix, rxkeyix; 6244 6245 /* XXX should take a locked ref to vap->iv_bss */ 6246 if (!ath_key_alloc(vap, &ni->ni_ucastkey, &keyix, &rxkeyix)) { 6247 /* 6248 * Key cache is full; we'll fall back to doing 6249 * the more expensive lookup in software. Note 6250 * this also means no h/w compression. 6251 */ 6252 /* XXX msg+statistic */ 6253 } else { 6254 /* XXX locking? */ 6255 ni->ni_ucastkey.wk_keyix = keyix; 6256 ni->ni_ucastkey.wk_rxkeyix = rxkeyix; 6257 /* NB: must mark device key to get called back on delete */ 6258 ni->ni_ucastkey.wk_flags |= IEEE80211_KEY_DEVKEY; 6259 IEEE80211_ADDR_COPY(ni->ni_ucastkey.wk_macaddr, ni->ni_macaddr); 6260 /* NB: this will create a pass-thru key entry */ 6261 ath_keyset(sc, vap, &ni->ni_ucastkey, vap->iv_bss); 6262 } 6263 } 6264 6265 /* 6266 * Setup driver-specific state for a newly associated node. 6267 * Note that we're called also on a re-associate, the isnew 6268 * param tells us if this is the first time or not. 6269 */ 6270 static void 6271 ath_newassoc(struct ieee80211_node *ni, int isnew) 6272 { 6273 struct ath_node *an = ATH_NODE(ni); 6274 struct ieee80211vap *vap = ni->ni_vap; 6275 struct ath_softc *sc = vap->iv_ic->ic_ifp->if_softc; 6276 const struct ieee80211_txparam *tp = ni->ni_txparms; 6277 6278 an->an_mcastrix = ath_tx_findrix(sc, tp->mcastrate); 6279 an->an_mgmtrix = ath_tx_findrix(sc, tp->mgmtrate); 6280 6281 DPRINTF(sc, ATH_DEBUG_NODE, "%s: %6D: reassoc; isnew=%d, is_powersave=%d\n", 6282 __func__, 6283 ni->ni_macaddr, 6284 ":", 6285 isnew, 6286 an->an_is_powersave); 6287 6288 ATH_NODE_LOCK(an); 6289 ath_rate_newassoc(sc, an, isnew); 6290 ATH_NODE_UNLOCK(an); 6291 6292 if (isnew && 6293 (vap->iv_flags & IEEE80211_F_PRIVACY) == 0 && sc->sc_hasclrkey && 6294 ni->ni_ucastkey.wk_keyix == IEEE80211_KEYIX_NONE) 6295 ath_setup_stationkey(ni); 6296 6297 /* 6298 * If we're reassociating, make sure that any paused queues 6299 * get unpaused. 6300 * 6301 * Now, we may hvae frames in the hardware queue for this node. 6302 * So if we are reassociating and there are frames in the queue, 6303 * we need to go through the cleanup path to ensure that they're 6304 * marked as non-aggregate. 6305 */ 6306 if (! isnew) { 6307 DPRINTF(sc, ATH_DEBUG_NODE, 6308 "%s: %6D: reassoc; is_powersave=%d\n", 6309 __func__, 6310 ni->ni_macaddr, 6311 ":", 6312 an->an_is_powersave); 6313 6314 /* XXX for now, we can't hold the lock across assoc */ 6315 ath_tx_node_reassoc(sc, an); 6316 6317 /* XXX for now, we can't hold the lock across wakeup */ 6318 if (an->an_is_powersave) 6319 ath_tx_node_wakeup(sc, an); 6320 } 6321 } 6322 6323 static int 6324 ath_setregdomain(struct ieee80211com *ic, struct ieee80211_regdomain *reg, 6325 int nchans, struct ieee80211_channel chans[]) 6326 { 6327 struct ath_softc *sc = ic->ic_ifp->if_softc; 6328 struct ath_hal *ah = sc->sc_ah; 6329 HAL_STATUS status; 6330 6331 DPRINTF(sc, ATH_DEBUG_REGDOMAIN, 6332 "%s: rd %u cc %u location %c%s\n", 6333 __func__, reg->regdomain, reg->country, reg->location, 6334 reg->ecm ? " ecm" : ""); 6335 6336 status = ath_hal_set_channels(ah, chans, nchans, 6337 reg->country, reg->regdomain); 6338 if (status != HAL_OK) { 6339 DPRINTF(sc, ATH_DEBUG_REGDOMAIN, "%s: failed, status %u\n", 6340 __func__, status); 6341 return EINVAL; /* XXX */ 6342 } 6343 6344 return 0; 6345 } 6346 6347 static void 6348 ath_getradiocaps(struct ieee80211com *ic, 6349 int maxchans, int *nchans, struct ieee80211_channel chans[]) 6350 { 6351 struct ath_softc *sc = ic->ic_ifp->if_softc; 6352 struct ath_hal *ah = sc->sc_ah; 6353 6354 DPRINTF(sc, ATH_DEBUG_REGDOMAIN, "%s: use rd %u cc %d\n", 6355 __func__, SKU_DEBUG, CTRY_DEFAULT); 6356 6357 /* XXX check return */ 6358 (void) ath_hal_getchannels(ah, chans, maxchans, nchans, 6359 HAL_MODE_ALL, CTRY_DEFAULT, SKU_DEBUG, AH_TRUE); 6360 6361 } 6362 6363 static int 6364 ath_getchannels(struct ath_softc *sc) 6365 { 6366 struct ifnet *ifp = sc->sc_ifp; 6367 struct ieee80211com *ic = ifp->if_l2com; 6368 struct ath_hal *ah = sc->sc_ah; 6369 HAL_STATUS status; 6370 6371 /* 6372 * Collect channel set based on EEPROM contents. 6373 */ 6374 status = ath_hal_init_channels(ah, ic->ic_channels, IEEE80211_CHAN_MAX, 6375 &ic->ic_nchans, HAL_MODE_ALL, CTRY_DEFAULT, SKU_NONE, AH_TRUE); 6376 if (status != HAL_OK) { 6377 if_printf(ifp, "%s: unable to collect channel list from hal, " 6378 "status %d\n", __func__, status); 6379 return EINVAL; 6380 } 6381 (void) ath_hal_getregdomain(ah, &sc->sc_eerd); 6382 ath_hal_getcountrycode(ah, &sc->sc_eecc); /* NB: cannot fail */ 6383 /* XXX map Atheros sku's to net80211 SKU's */ 6384 /* XXX net80211 types too small */ 6385 ic->ic_regdomain.regdomain = (uint16_t) sc->sc_eerd; 6386 ic->ic_regdomain.country = (uint16_t) sc->sc_eecc; 6387 ic->ic_regdomain.isocc[0] = ' '; /* XXX don't know */ 6388 ic->ic_regdomain.isocc[1] = ' '; 6389 6390 ic->ic_regdomain.ecm = 1; 6391 ic->ic_regdomain.location = 'I'; 6392 6393 DPRINTF(sc, ATH_DEBUG_REGDOMAIN, 6394 "%s: eeprom rd %u cc %u (mapped rd %u cc %u) location %c%s\n", 6395 __func__, sc->sc_eerd, sc->sc_eecc, 6396 ic->ic_regdomain.regdomain, ic->ic_regdomain.country, 6397 ic->ic_regdomain.location, ic->ic_regdomain.ecm ? " ecm" : ""); 6398 return 0; 6399 } 6400 6401 static int 6402 ath_rate_setup(struct ath_softc *sc, u_int mode) 6403 { 6404 struct ath_hal *ah = sc->sc_ah; 6405 const HAL_RATE_TABLE *rt; 6406 6407 switch (mode) { 6408 case IEEE80211_MODE_11A: 6409 rt = ath_hal_getratetable(ah, HAL_MODE_11A); 6410 break; 6411 case IEEE80211_MODE_HALF: 6412 rt = ath_hal_getratetable(ah, HAL_MODE_11A_HALF_RATE); 6413 break; 6414 case IEEE80211_MODE_QUARTER: 6415 rt = ath_hal_getratetable(ah, HAL_MODE_11A_QUARTER_RATE); 6416 break; 6417 case IEEE80211_MODE_11B: 6418 rt = ath_hal_getratetable(ah, HAL_MODE_11B); 6419 break; 6420 case IEEE80211_MODE_11G: 6421 rt = ath_hal_getratetable(ah, HAL_MODE_11G); 6422 break; 6423 case IEEE80211_MODE_TURBO_A: 6424 rt = ath_hal_getratetable(ah, HAL_MODE_108A); 6425 break; 6426 case IEEE80211_MODE_TURBO_G: 6427 rt = ath_hal_getratetable(ah, HAL_MODE_108G); 6428 break; 6429 case IEEE80211_MODE_STURBO_A: 6430 rt = ath_hal_getratetable(ah, HAL_MODE_TURBO); 6431 break; 6432 case IEEE80211_MODE_11NA: 6433 rt = ath_hal_getratetable(ah, HAL_MODE_11NA_HT20); 6434 break; 6435 case IEEE80211_MODE_11NG: 6436 rt = ath_hal_getratetable(ah, HAL_MODE_11NG_HT20); 6437 break; 6438 default: 6439 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid mode %u\n", 6440 __func__, mode); 6441 return 0; 6442 } 6443 sc->sc_rates[mode] = rt; 6444 return (rt != NULL); 6445 } 6446 6447 static void 6448 ath_setcurmode(struct ath_softc *sc, enum ieee80211_phymode mode) 6449 { 6450 #define N(a) (sizeof(a)/sizeof(a[0])) 6451 /* NB: on/off times from the Atheros NDIS driver, w/ permission */ 6452 static const struct { 6453 u_int rate; /* tx/rx 802.11 rate */ 6454 u_int16_t timeOn; /* LED on time (ms) */ 6455 u_int16_t timeOff; /* LED off time (ms) */ 6456 } blinkrates[] = { 6457 { 108, 40, 10 }, 6458 { 96, 44, 11 }, 6459 { 72, 50, 13 }, 6460 { 48, 57, 14 }, 6461 { 36, 67, 16 }, 6462 { 24, 80, 20 }, 6463 { 22, 100, 25 }, 6464 { 18, 133, 34 }, 6465 { 12, 160, 40 }, 6466 { 10, 200, 50 }, 6467 { 6, 240, 58 }, 6468 { 4, 267, 66 }, 6469 { 2, 400, 100 }, 6470 { 0, 500, 130 }, 6471 /* XXX half/quarter rates */ 6472 }; 6473 const HAL_RATE_TABLE *rt; 6474 int i, j; 6475 6476 memset(sc->sc_rixmap, 0xff, sizeof(sc->sc_rixmap)); 6477 rt = sc->sc_rates[mode]; 6478 KASSERT(rt != NULL, ("no h/w rate set for phy mode %u", mode)); 6479 for (i = 0; i < rt->rateCount; i++) { 6480 uint8_t ieeerate = rt->info[i].dot11Rate & IEEE80211_RATE_VAL; 6481 if (rt->info[i].phy != IEEE80211_T_HT) 6482 sc->sc_rixmap[ieeerate] = i; 6483 else 6484 sc->sc_rixmap[ieeerate | IEEE80211_RATE_MCS] = i; 6485 } 6486 memset(sc->sc_hwmap, 0, sizeof(sc->sc_hwmap)); 6487 for (i = 0; i < N(sc->sc_hwmap); i++) { 6488 if (i >= rt->rateCount) { 6489 sc->sc_hwmap[i].ledon = (500 * hz) / 1000; 6490 sc->sc_hwmap[i].ledoff = (130 * hz) / 1000; 6491 continue; 6492 } 6493 sc->sc_hwmap[i].ieeerate = 6494 rt->info[i].dot11Rate & IEEE80211_RATE_VAL; 6495 if (rt->info[i].phy == IEEE80211_T_HT) 6496 sc->sc_hwmap[i].ieeerate |= IEEE80211_RATE_MCS; 6497 sc->sc_hwmap[i].txflags = IEEE80211_RADIOTAP_F_DATAPAD; 6498 if (rt->info[i].shortPreamble || 6499 rt->info[i].phy == IEEE80211_T_OFDM) 6500 sc->sc_hwmap[i].txflags |= IEEE80211_RADIOTAP_F_SHORTPRE; 6501 sc->sc_hwmap[i].rxflags = sc->sc_hwmap[i].txflags; 6502 for (j = 0; j < N(blinkrates)-1; j++) 6503 if (blinkrates[j].rate == sc->sc_hwmap[i].ieeerate) 6504 break; 6505 /* NB: this uses the last entry if the rate isn't found */ 6506 /* XXX beware of overlow */ 6507 sc->sc_hwmap[i].ledon = (blinkrates[j].timeOn * hz) / 1000; 6508 sc->sc_hwmap[i].ledoff = (blinkrates[j].timeOff * hz) / 1000; 6509 } 6510 sc->sc_currates = rt; 6511 sc->sc_curmode = mode; 6512 /* 6513 * All protection frames are transmited at 2Mb/s for 6514 * 11g, otherwise at 1Mb/s. 6515 */ 6516 if (mode == IEEE80211_MODE_11G) 6517 sc->sc_protrix = ath_tx_findrix(sc, 2*2); 6518 else 6519 sc->sc_protrix = ath_tx_findrix(sc, 2*1); 6520 /* NB: caller is responsible for resetting rate control state */ 6521 #undef N 6522 } 6523 6524 static void 6525 ath_watchdog(void *arg) 6526 { 6527 struct ath_softc *sc = arg; 6528 int do_reset = 0; 6529 6530 ATH_LOCK_ASSERT(sc); 6531 6532 if (sc->sc_wd_timer != 0 && --sc->sc_wd_timer == 0) { 6533 struct ifnet *ifp = sc->sc_ifp; 6534 uint32_t hangs; 6535 6536 ath_power_set_power_state(sc, HAL_PM_AWAKE); 6537 6538 if (ath_hal_gethangstate(sc->sc_ah, 0xffff, &hangs) && 6539 hangs != 0) { 6540 if_printf(ifp, "%s hang detected (0x%x)\n", 6541 hangs & 0xff ? "bb" : "mac", hangs); 6542 } else 6543 if_printf(ifp, "device timeout\n"); 6544 do_reset = 1; 6545 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 6546 sc->sc_stats.ast_watchdog++; 6547 6548 ath_power_restore_power_state(sc); 6549 } 6550 6551 /* 6552 * We can't hold the lock across the ath_reset() call. 6553 * 6554 * And since this routine can't hold a lock and sleep, 6555 * do the reset deferred. 6556 */ 6557 if (do_reset) { 6558 taskqueue_enqueue(sc->sc_tq, &sc->sc_resettask); 6559 } 6560 6561 callout_schedule(&sc->sc_wd_ch, hz); 6562 } 6563 6564 /* 6565 * Fetch the rate control statistics for the given node. 6566 */ 6567 static int 6568 ath_ioctl_ratestats(struct ath_softc *sc, struct ath_rateioctl *rs) 6569 { 6570 struct ath_node *an; 6571 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 6572 struct ieee80211_node *ni; 6573 int error = 0; 6574 6575 /* Perform a lookup on the given node */ 6576 ni = ieee80211_find_node(&ic->ic_sta, rs->is_u.macaddr); 6577 if (ni == NULL) { 6578 error = EINVAL; 6579 goto bad; 6580 } 6581 6582 /* Lock the ath_node */ 6583 an = ATH_NODE(ni); 6584 ATH_NODE_LOCK(an); 6585 6586 /* Fetch the rate control stats for this node */ 6587 error = ath_rate_fetch_node_stats(sc, an, rs); 6588 6589 /* No matter what happens here, just drop through */ 6590 6591 /* Unlock the ath_node */ 6592 ATH_NODE_UNLOCK(an); 6593 6594 /* Unref the node */ 6595 ieee80211_node_decref(ni); 6596 6597 bad: 6598 return (error); 6599 } 6600 6601 #ifdef ATH_DIAGAPI 6602 /* 6603 * Diagnostic interface to the HAL. This is used by various 6604 * tools to do things like retrieve register contents for 6605 * debugging. The mechanism is intentionally opaque so that 6606 * it can change frequently w/o concern for compatiblity. 6607 */ 6608 static int 6609 ath_ioctl_diag(struct ath_softc *sc, struct ath_diag *ad) 6610 { 6611 struct ath_hal *ah = sc->sc_ah; 6612 u_int id = ad->ad_id & ATH_DIAG_ID; 6613 void *indata = NULL; 6614 void *outdata = NULL; 6615 u_int32_t insize = ad->ad_in_size; 6616 u_int32_t outsize = ad->ad_out_size; 6617 int error = 0; 6618 6619 if (ad->ad_id & ATH_DIAG_IN) { 6620 /* 6621 * Copy in data. 6622 */ 6623 indata = malloc(insize, M_TEMP, M_NOWAIT); 6624 if (indata == NULL) { 6625 error = ENOMEM; 6626 goto bad; 6627 } 6628 error = copyin(ad->ad_in_data, indata, insize); 6629 if (error) 6630 goto bad; 6631 } 6632 if (ad->ad_id & ATH_DIAG_DYN) { 6633 /* 6634 * Allocate a buffer for the results (otherwise the HAL 6635 * returns a pointer to a buffer where we can read the 6636 * results). Note that we depend on the HAL leaving this 6637 * pointer for us to use below in reclaiming the buffer; 6638 * may want to be more defensive. 6639 */ 6640 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 6641 if (outdata == NULL) { 6642 error = ENOMEM; 6643 goto bad; 6644 } 6645 } 6646 6647 6648 ATH_LOCK(sc); 6649 if (id != HAL_DIAG_REGS) 6650 ath_power_set_power_state(sc, HAL_PM_AWAKE); 6651 ATH_UNLOCK(sc); 6652 6653 if (ath_hal_getdiagstate(ah, id, indata, insize, &outdata, &outsize)) { 6654 if (outsize < ad->ad_out_size) 6655 ad->ad_out_size = outsize; 6656 if (outdata != NULL) 6657 error = copyout(outdata, ad->ad_out_data, 6658 ad->ad_out_size); 6659 } else { 6660 error = EINVAL; 6661 } 6662 6663 ATH_LOCK(sc); 6664 if (id != HAL_DIAG_REGS) 6665 ath_power_restore_power_state(sc); 6666 ATH_UNLOCK(sc); 6667 6668 bad: 6669 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 6670 free(indata, M_TEMP); 6671 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 6672 free(outdata, M_TEMP); 6673 return error; 6674 } 6675 #endif /* ATH_DIAGAPI */ 6676 6677 static int 6678 ath_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 6679 { 6680 #define IS_RUNNING(ifp) \ 6681 ((ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING)) 6682 struct ath_softc *sc = ifp->if_softc; 6683 struct ieee80211com *ic = ifp->if_l2com; 6684 struct ifreq *ifr = (struct ifreq *)data; 6685 const HAL_RATE_TABLE *rt; 6686 int error = 0; 6687 6688 switch (cmd) { 6689 case SIOCSIFFLAGS: 6690 if (IS_RUNNING(ifp)) { 6691 /* 6692 * To avoid rescanning another access point, 6693 * do not call ath_init() here. Instead, 6694 * only reflect promisc mode settings. 6695 */ 6696 ATH_LOCK(sc); 6697 ath_power_set_power_state(sc, HAL_PM_AWAKE); 6698 ath_mode_init(sc); 6699 ath_power_restore_power_state(sc); 6700 ATH_UNLOCK(sc); 6701 } else if (ifp->if_flags & IFF_UP) { 6702 /* 6703 * Beware of being called during attach/detach 6704 * to reset promiscuous mode. In that case we 6705 * will still be marked UP but not RUNNING. 6706 * However trying to re-init the interface 6707 * is the wrong thing to do as we've already 6708 * torn down much of our state. There's 6709 * probably a better way to deal with this. 6710 */ 6711 if (!sc->sc_invalid) 6712 ath_init(sc); /* XXX lose error */ 6713 } else { 6714 ATH_LOCK(sc); 6715 ath_stop_locked(ifp); 6716 if (!sc->sc_invalid) 6717 ath_power_setpower(sc, HAL_PM_FULL_SLEEP); 6718 ATH_UNLOCK(sc); 6719 } 6720 break; 6721 case SIOCGIFMEDIA: 6722 case SIOCSIFMEDIA: 6723 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd); 6724 break; 6725 case SIOCGATHSTATS: 6726 /* NB: embed these numbers to get a consistent view */ 6727 sc->sc_stats.ast_tx_packets = ifp->if_get_counter(ifp, 6728 IFCOUNTER_OPACKETS); 6729 sc->sc_stats.ast_rx_packets = ifp->if_get_counter(ifp, 6730 IFCOUNTER_IPACKETS); 6731 sc->sc_stats.ast_tx_rssi = ATH_RSSI(sc->sc_halstats.ns_avgtxrssi); 6732 sc->sc_stats.ast_rx_rssi = ATH_RSSI(sc->sc_halstats.ns_avgrssi); 6733 #ifdef IEEE80211_SUPPORT_TDMA 6734 sc->sc_stats.ast_tdma_tsfadjp = TDMA_AVG(sc->sc_avgtsfdeltap); 6735 sc->sc_stats.ast_tdma_tsfadjm = TDMA_AVG(sc->sc_avgtsfdeltam); 6736 #endif 6737 rt = sc->sc_currates; 6738 sc->sc_stats.ast_tx_rate = 6739 rt->info[sc->sc_txrix].dot11Rate &~ IEEE80211_RATE_BASIC; 6740 if (rt->info[sc->sc_txrix].phy & IEEE80211_T_HT) 6741 sc->sc_stats.ast_tx_rate |= IEEE80211_RATE_MCS; 6742 return copyout(&sc->sc_stats, 6743 ifr->ifr_data, sizeof (sc->sc_stats)); 6744 case SIOCGATHAGSTATS: 6745 return copyout(&sc->sc_aggr_stats, 6746 ifr->ifr_data, sizeof (sc->sc_aggr_stats)); 6747 case SIOCZATHSTATS: 6748 error = priv_check(curthread, PRIV_DRIVER); 6749 if (error == 0) { 6750 memset(&sc->sc_stats, 0, sizeof(sc->sc_stats)); 6751 memset(&sc->sc_aggr_stats, 0, 6752 sizeof(sc->sc_aggr_stats)); 6753 memset(&sc->sc_intr_stats, 0, 6754 sizeof(sc->sc_intr_stats)); 6755 } 6756 break; 6757 #ifdef ATH_DIAGAPI 6758 case SIOCGATHDIAG: 6759 error = ath_ioctl_diag(sc, (struct ath_diag *) ifr); 6760 break; 6761 case SIOCGATHPHYERR: 6762 error = ath_ioctl_phyerr(sc,(struct ath_diag*) ifr); 6763 break; 6764 #endif 6765 case SIOCGATHSPECTRAL: 6766 error = ath_ioctl_spectral(sc,(struct ath_diag*) ifr); 6767 break; 6768 case SIOCGATHNODERATESTATS: 6769 error = ath_ioctl_ratestats(sc, (struct ath_rateioctl *) ifr); 6770 break; 6771 case SIOCGIFADDR: 6772 error = ether_ioctl(ifp, cmd, data); 6773 break; 6774 default: 6775 error = EINVAL; 6776 break; 6777 } 6778 return error; 6779 #undef IS_RUNNING 6780 } 6781 6782 /* 6783 * Announce various information on device/driver attach. 6784 */ 6785 static void 6786 ath_announce(struct ath_softc *sc) 6787 { 6788 struct ifnet *ifp = sc->sc_ifp; 6789 struct ath_hal *ah = sc->sc_ah; 6790 6791 if_printf(ifp, "AR%s mac %d.%d RF%s phy %d.%d\n", 6792 ath_hal_mac_name(ah), ah->ah_macVersion, ah->ah_macRev, 6793 ath_hal_rf_name(ah), ah->ah_phyRev >> 4, ah->ah_phyRev & 0xf); 6794 if_printf(ifp, "2GHz radio: 0x%.4x; 5GHz radio: 0x%.4x\n", 6795 ah->ah_analog2GhzRev, ah->ah_analog5GhzRev); 6796 if (bootverbose) { 6797 int i; 6798 for (i = 0; i <= WME_AC_VO; i++) { 6799 struct ath_txq *txq = sc->sc_ac2q[i]; 6800 if_printf(ifp, "Use hw queue %u for %s traffic\n", 6801 txq->axq_qnum, ieee80211_wme_acnames[i]); 6802 } 6803 if_printf(ifp, "Use hw queue %u for CAB traffic\n", 6804 sc->sc_cabq->axq_qnum); 6805 if_printf(ifp, "Use hw queue %u for beacons\n", sc->sc_bhalq); 6806 } 6807 if (ath_rxbuf != ATH_RXBUF) 6808 if_printf(ifp, "using %u rx buffers\n", ath_rxbuf); 6809 if (ath_txbuf != ATH_TXBUF) 6810 if_printf(ifp, "using %u tx buffers\n", ath_txbuf); 6811 if (sc->sc_mcastkey && bootverbose) 6812 if_printf(ifp, "using multicast key search\n"); 6813 } 6814 6815 static void 6816 ath_dfs_tasklet(void *p, int npending) 6817 { 6818 struct ath_softc *sc = (struct ath_softc *) p; 6819 struct ifnet *ifp = sc->sc_ifp; 6820 struct ieee80211com *ic = ifp->if_l2com; 6821 6822 /* 6823 * If previous processing has found a radar event, 6824 * signal this to the net80211 layer to begin DFS 6825 * processing. 6826 */ 6827 if (ath_dfs_process_radar_event(sc, sc->sc_curchan)) { 6828 /* DFS event found, initiate channel change */ 6829 /* 6830 * XXX doesn't currently tell us whether the event 6831 * XXX was found in the primary or extension 6832 * XXX channel! 6833 */ 6834 IEEE80211_LOCK(ic); 6835 ieee80211_dfs_notify_radar(ic, sc->sc_curchan); 6836 IEEE80211_UNLOCK(ic); 6837 } 6838 } 6839 6840 /* 6841 * Enable/disable power save. This must be called with 6842 * no TX driver locks currently held, so it should only 6843 * be called from the RX path (which doesn't hold any 6844 * TX driver locks.) 6845 */ 6846 static void 6847 ath_node_powersave(struct ieee80211_node *ni, int enable) 6848 { 6849 #ifdef ATH_SW_PSQ 6850 struct ath_node *an = ATH_NODE(ni); 6851 struct ieee80211com *ic = ni->ni_ic; 6852 struct ath_softc *sc = ic->ic_ifp->if_softc; 6853 struct ath_vap *avp = ATH_VAP(ni->ni_vap); 6854 6855 /* XXX and no TXQ locks should be held here */ 6856 6857 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, "%s: %6D: enable=%d\n", 6858 __func__, 6859 ni->ni_macaddr, 6860 ":", 6861 !! enable); 6862 6863 /* Suspend or resume software queue handling */ 6864 if (enable) 6865 ath_tx_node_sleep(sc, an); 6866 else 6867 ath_tx_node_wakeup(sc, an); 6868 6869 /* Update net80211 state */ 6870 avp->av_node_ps(ni, enable); 6871 #else 6872 struct ath_vap *avp = ATH_VAP(ni->ni_vap); 6873 6874 /* Update net80211 state */ 6875 avp->av_node_ps(ni, enable); 6876 #endif/* ATH_SW_PSQ */ 6877 } 6878 6879 /* 6880 * Notification from net80211 that the powersave queue state has 6881 * changed. 6882 * 6883 * Since the software queue also may have some frames: 6884 * 6885 * + if the node software queue has frames and the TID state 6886 * is 0, we set the TIM; 6887 * + if the node and the stack are both empty, we clear the TIM bit. 6888 * + If the stack tries to set the bit, always set it. 6889 * + If the stack tries to clear the bit, only clear it if the 6890 * software queue in question is also cleared. 6891 * 6892 * TODO: this is called during node teardown; so let's ensure this 6893 * is all correctly handled and that the TIM bit is cleared. 6894 * It may be that the node flush is called _AFTER_ the net80211 6895 * stack clears the TIM. 6896 * 6897 * Here is the racy part. Since it's possible >1 concurrent, 6898 * overlapping TXes will appear complete with a TX completion in 6899 * another thread, it's possible that the concurrent TIM calls will 6900 * clash. We can't hold the node lock here because setting the 6901 * TIM grabs the net80211 comlock and this may cause a LOR. 6902 * The solution is either to totally serialise _everything_ at 6903 * this point (ie, all TX, completion and any reset/flush go into 6904 * one taskqueue) or a new "ath TIM lock" needs to be created that 6905 * just wraps the driver state change and this call to avp->av_set_tim(). 6906 * 6907 * The same race exists in the net80211 power save queue handling 6908 * as well. Since multiple transmitting threads may queue frames 6909 * into the driver, as well as ps-poll and the driver transmitting 6910 * frames (and thus clearing the psq), it's quite possible that 6911 * a packet entering the PSQ and a ps-poll being handled will 6912 * race, causing the TIM to be cleared and not re-set. 6913 */ 6914 static int 6915 ath_node_set_tim(struct ieee80211_node *ni, int enable) 6916 { 6917 #ifdef ATH_SW_PSQ 6918 struct ieee80211com *ic = ni->ni_ic; 6919 struct ath_softc *sc = ic->ic_ifp->if_softc; 6920 struct ath_node *an = ATH_NODE(ni); 6921 struct ath_vap *avp = ATH_VAP(ni->ni_vap); 6922 int changed = 0; 6923 6924 ATH_TX_LOCK(sc); 6925 an->an_stack_psq = enable; 6926 6927 /* 6928 * This will get called for all operating modes, 6929 * even if avp->av_set_tim is unset. 6930 * It's currently set for hostap/ibss modes; but 6931 * the same infrastructure is used for both STA 6932 * and AP/IBSS node power save. 6933 */ 6934 if (avp->av_set_tim == NULL) { 6935 ATH_TX_UNLOCK(sc); 6936 return (0); 6937 } 6938 6939 /* 6940 * If setting the bit, always set it here. 6941 * If clearing the bit, only clear it if the 6942 * software queue is also empty. 6943 * 6944 * If the node has left power save, just clear the TIM 6945 * bit regardless of the state of the power save queue. 6946 * 6947 * XXX TODO: although atomics are used, it's quite possible 6948 * that a race will occur between this and setting/clearing 6949 * in another thread. TX completion will occur always in 6950 * one thread, however setting/clearing the TIM bit can come 6951 * from a variety of different process contexts! 6952 */ 6953 if (enable && an->an_tim_set == 1) { 6954 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6955 "%s: %6D: enable=%d, tim_set=1, ignoring\n", 6956 __func__, 6957 ni->ni_macaddr, 6958 ":", 6959 enable); 6960 ATH_TX_UNLOCK(sc); 6961 } else if (enable) { 6962 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6963 "%s: %6D: enable=%d, enabling TIM\n", 6964 __func__, 6965 ni->ni_macaddr, 6966 ":", 6967 enable); 6968 an->an_tim_set = 1; 6969 ATH_TX_UNLOCK(sc); 6970 changed = avp->av_set_tim(ni, enable); 6971 } else if (an->an_swq_depth == 0) { 6972 /* disable */ 6973 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6974 "%s: %6D: enable=%d, an_swq_depth == 0, disabling\n", 6975 __func__, 6976 ni->ni_macaddr, 6977 ":", 6978 enable); 6979 an->an_tim_set = 0; 6980 ATH_TX_UNLOCK(sc); 6981 changed = avp->av_set_tim(ni, enable); 6982 } else if (! an->an_is_powersave) { 6983 /* 6984 * disable regardless; the node isn't in powersave now 6985 */ 6986 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 6987 "%s: %6D: enable=%d, an_pwrsave=0, disabling\n", 6988 __func__, 6989 ni->ni_macaddr, 6990 ":", 6991 enable); 6992 an->an_tim_set = 0; 6993 ATH_TX_UNLOCK(sc); 6994 changed = avp->av_set_tim(ni, enable); 6995 } else { 6996 /* 6997 * psq disable, node is currently in powersave, node 6998 * software queue isn't empty, so don't clear the TIM bit 6999 * for now. 7000 */ 7001 ATH_TX_UNLOCK(sc); 7002 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 7003 "%s: %6D: enable=%d, an_swq_depth > 0, ignoring\n", 7004 __func__, 7005 ni->ni_macaddr, 7006 ":", 7007 enable); 7008 changed = 0; 7009 } 7010 7011 return (changed); 7012 #else 7013 struct ath_vap *avp = ATH_VAP(ni->ni_vap); 7014 7015 /* 7016 * Some operating modes don't set av_set_tim(), so don't 7017 * update it here. 7018 */ 7019 if (avp->av_set_tim == NULL) 7020 return (0); 7021 7022 return (avp->av_set_tim(ni, enable)); 7023 #endif /* ATH_SW_PSQ */ 7024 } 7025 7026 /* 7027 * Set or update the TIM from the software queue. 7028 * 7029 * Check the software queue depth before attempting to do lock 7030 * anything; that avoids trying to obtain the lock. Then, 7031 * re-check afterwards to ensure nothing has changed in the 7032 * meantime. 7033 * 7034 * set: This is designed to be called from the TX path, after 7035 * a frame has been queued; to see if the swq > 0. 7036 * 7037 * clear: This is designed to be called from the buffer completion point 7038 * (right now it's ath_tx_default_comp()) where the state of 7039 * a software queue has changed. 7040 * 7041 * It makes sense to place it at buffer free / completion rather 7042 * than after each software queue operation, as there's no real 7043 * point in churning the TIM bit as the last frames in the software 7044 * queue are transmitted. If they fail and we retry them, we'd 7045 * just be setting the TIM bit again anyway. 7046 */ 7047 void 7048 ath_tx_update_tim(struct ath_softc *sc, struct ieee80211_node *ni, 7049 int enable) 7050 { 7051 #ifdef ATH_SW_PSQ 7052 struct ath_node *an; 7053 struct ath_vap *avp; 7054 7055 /* Don't do this for broadcast/etc frames */ 7056 if (ni == NULL) 7057 return; 7058 7059 an = ATH_NODE(ni); 7060 avp = ATH_VAP(ni->ni_vap); 7061 7062 /* 7063 * And for operating modes without the TIM handler set, let's 7064 * just skip those. 7065 */ 7066 if (avp->av_set_tim == NULL) 7067 return; 7068 7069 ATH_TX_LOCK_ASSERT(sc); 7070 7071 if (enable) { 7072 if (an->an_is_powersave && 7073 an->an_tim_set == 0 && 7074 an->an_swq_depth != 0) { 7075 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 7076 "%s: %6D: swq_depth>0, tim_set=0, set!\n", 7077 __func__, 7078 ni->ni_macaddr, 7079 ":"); 7080 an->an_tim_set = 1; 7081 (void) avp->av_set_tim(ni, 1); 7082 } 7083 } else { 7084 /* 7085 * Don't bother grabbing the lock unless the queue is empty. 7086 */ 7087 if (an->an_swq_depth != 0) 7088 return; 7089 7090 if (an->an_is_powersave && 7091 an->an_stack_psq == 0 && 7092 an->an_tim_set == 1 && 7093 an->an_swq_depth == 0) { 7094 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 7095 "%s: %6D: swq_depth=0, tim_set=1, psq_set=0," 7096 " clear!\n", 7097 __func__, 7098 ni->ni_macaddr, 7099 ":"); 7100 an->an_tim_set = 0; 7101 (void) avp->av_set_tim(ni, 0); 7102 } 7103 } 7104 #else 7105 return; 7106 #endif /* ATH_SW_PSQ */ 7107 } 7108 7109 /* 7110 * Received a ps-poll frame from net80211. 7111 * 7112 * Here we get a chance to serve out a software-queued frame ourselves 7113 * before we punt it to net80211 to transmit us one itself - either 7114 * because there's traffic in the net80211 psq, or a NULL frame to 7115 * indicate there's nothing else. 7116 */ 7117 static void 7118 ath_node_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m) 7119 { 7120 #ifdef ATH_SW_PSQ 7121 struct ath_node *an; 7122 struct ath_vap *avp; 7123 struct ieee80211com *ic = ni->ni_ic; 7124 struct ath_softc *sc = ic->ic_ifp->if_softc; 7125 int tid; 7126 7127 /* Just paranoia */ 7128 if (ni == NULL) 7129 return; 7130 7131 /* 7132 * Unassociated (temporary node) station. 7133 */ 7134 if (ni->ni_associd == 0) 7135 return; 7136 7137 /* 7138 * We do have an active node, so let's begin looking into it. 7139 */ 7140 an = ATH_NODE(ni); 7141 avp = ATH_VAP(ni->ni_vap); 7142 7143 /* 7144 * For now, we just call the original ps-poll method. 7145 * Once we're ready to flip this on: 7146 * 7147 * + Set leak to 1, as no matter what we're going to have 7148 * to send a frame; 7149 * + Check the software queue and if there's something in it, 7150 * schedule the highest TID thas has traffic from this node. 7151 * Then make sure we schedule the software scheduler to 7152 * run so it picks up said frame. 7153 * 7154 * That way whatever happens, we'll at least send _a_ frame 7155 * to the given node. 7156 * 7157 * Again, yes, it's crappy QoS if the node has multiple 7158 * TIDs worth of traffic - but let's get it working first 7159 * before we optimise it. 7160 * 7161 * Also yes, there's definitely latency here - we're not 7162 * direct dispatching to the hardware in this path (and 7163 * we're likely being called from the packet receive path, 7164 * so going back into TX may be a little hairy!) but again 7165 * I'd like to get this working first before optimising 7166 * turn-around time. 7167 */ 7168 7169 ATH_TX_LOCK(sc); 7170 7171 /* 7172 * Legacy - we're called and the node isn't asleep. 7173 * Immediately punt. 7174 */ 7175 if (! an->an_is_powersave) { 7176 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 7177 "%s: %6D: not in powersave?\n", 7178 __func__, 7179 ni->ni_macaddr, 7180 ":"); 7181 ATH_TX_UNLOCK(sc); 7182 avp->av_recv_pspoll(ni, m); 7183 return; 7184 } 7185 7186 /* 7187 * We're in powersave. 7188 * 7189 * Leak a frame. 7190 */ 7191 an->an_leak_count = 1; 7192 7193 /* 7194 * Now, if there's no frames in the node, just punt to 7195 * recv_pspoll. 7196 * 7197 * Don't bother checking if the TIM bit is set, we really 7198 * only care if there are any frames here! 7199 */ 7200 if (an->an_swq_depth == 0) { 7201 ATH_TX_UNLOCK(sc); 7202 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 7203 "%s: %6D: SWQ empty; punting to net80211\n", 7204 __func__, 7205 ni->ni_macaddr, 7206 ":"); 7207 avp->av_recv_pspoll(ni, m); 7208 return; 7209 } 7210 7211 /* 7212 * Ok, let's schedule the highest TID that has traffic 7213 * and then schedule something. 7214 */ 7215 for (tid = IEEE80211_TID_SIZE - 1; tid >= 0; tid--) { 7216 struct ath_tid *atid = &an->an_tid[tid]; 7217 /* 7218 * No frames? Skip. 7219 */ 7220 if (atid->axq_depth == 0) 7221 continue; 7222 ath_tx_tid_sched(sc, atid); 7223 /* 7224 * XXX we could do a direct call to the TXQ 7225 * scheduler code here to optimise latency 7226 * at the expense of a REALLY deep callstack. 7227 */ 7228 ATH_TX_UNLOCK(sc); 7229 taskqueue_enqueue(sc->sc_tq, &sc->sc_txqtask); 7230 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 7231 "%s: %6D: leaking frame to TID %d\n", 7232 __func__, 7233 ni->ni_macaddr, 7234 ":", 7235 tid); 7236 return; 7237 } 7238 7239 ATH_TX_UNLOCK(sc); 7240 7241 /* 7242 * XXX nothing in the TIDs at this point? Eek. 7243 */ 7244 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE, 7245 "%s: %6D: TIDs empty, but ath_node showed traffic?!\n", 7246 __func__, 7247 ni->ni_macaddr, 7248 ":"); 7249 avp->av_recv_pspoll(ni, m); 7250 #else 7251 avp->av_recv_pspoll(ni, m); 7252 #endif /* ATH_SW_PSQ */ 7253 } 7254 7255 MODULE_VERSION(if_ath, 1); 7256 MODULE_DEPEND(if_ath, wlan, 1, 1, 1); /* 802.11 media layer */ 7257 #if defined(IEEE80211_ALQ) || defined(AH_DEBUG_ALQ) || defined(ATH_DEBUG_ALQ) 7258 MODULE_DEPEND(if_ath, alq, 1, 1, 1); 7259 #endif 7260