ath.c revision 1.60.6.1
1 /* $NetBSD: ath.c,v 1.60.6.1 2005/11/22 16:08:06 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 15 * redistribution must be conditioned upon including a substantially 16 * similar Disclaimer requirement for further binary redistribution. 17 * 3. Neither the names of the above-listed copyright holders nor the names 18 * of any contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * Alternatively, this software may be distributed under the terms of the 22 * GNU General Public License ("GPL") version 2 as published by the Free 23 * Software Foundation. 24 * 25 * NO WARRANTY 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 28 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 29 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 30 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 31 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 34 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 36 * THE POSSIBILITY OF SUCH DAMAGES. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifdef __FreeBSD__ 41 __FBSDID("$FreeBSD: src/sys/dev/ath/if_ath.c,v 1.104 2005/09/16 10:09:23 ru Exp $"); 42 #endif 43 #ifdef __NetBSD__ 44 __KERNEL_RCSID(0, "$NetBSD: ath.c,v 1.60.6.1 2005/11/22 16:08:06 yamt Exp $"); 45 #endif 46 47 /* 48 * Driver for the Atheros Wireless LAN controller. 49 * 50 * This software is derived from work of Atsushi Onoe; his contribution 51 * is greatly appreciated. 52 */ 53 54 #include "opt_inet.h" 55 56 #ifdef __NetBSD__ 57 #include "bpfilter.h" 58 #endif /* __NetBSD__ */ 59 60 #include <sys/param.h> 61 #include <sys/reboot.h> 62 #include <sys/systm.h> 63 #include <sys/types.h> 64 #include <sys/sysctl.h> 65 #include <sys/mbuf.h> 66 #include <sys/malloc.h> 67 #include <sys/lock.h> 68 #include <sys/kernel.h> 69 #include <sys/socket.h> 70 #include <sys/sockio.h> 71 #include <sys/errno.h> 72 #include <sys/callout.h> 73 #include <machine/bus.h> 74 #include <sys/endian.h> 75 76 #include <machine/bus.h> 77 78 #include <net/if.h> 79 #include <net/if_dl.h> 80 #include <net/if_media.h> 81 #include <net/if_types.h> 82 #include <net/if_arp.h> 83 #include <net/if_ether.h> 84 #include <net/if_llc.h> 85 86 #include <net80211/ieee80211_netbsd.h> 87 #include <net80211/ieee80211_var.h> 88 89 #if NBPFILTER > 0 90 #include <net/bpf.h> 91 #endif 92 93 #ifdef INET 94 #include <netinet/in.h> 95 #endif 96 97 #include <sys/device.h> 98 #include <dev/ic/ath_netbsd.h> 99 100 #define AR_DEBUG 101 #include <dev/ic/athvar.h> 102 #include <contrib/dev/ic/athhal_desc.h> 103 #include <contrib/dev/ic/athhal_devid.h> /* XXX for softled */ 104 105 /* unaligned little endian access */ 106 #define LE_READ_2(p) \ 107 ((u_int16_t) \ 108 ((((u_int8_t *)(p))[0] ) | (((u_int8_t *)(p))[1] << 8))) 109 #define LE_READ_4(p) \ 110 ((u_int32_t) \ 111 ((((u_int8_t *)(p))[0] ) | (((u_int8_t *)(p))[1] << 8) | \ 112 (((u_int8_t *)(p))[2] << 16) | (((u_int8_t *)(p))[3] << 24))) 113 114 enum { 115 ATH_LED_TX, 116 ATH_LED_RX, 117 ATH_LED_POLL, 118 }; 119 120 static int ath_ifinit(struct ifnet *); 121 static int ath_init(struct ath_softc *); 122 static void ath_stop_locked(struct ifnet *, int); 123 static void ath_stop(struct ifnet *, int); 124 static void ath_start(struct ifnet *); 125 static int ath_media_change(struct ifnet *); 126 static void ath_watchdog(struct ifnet *); 127 static int ath_ioctl(struct ifnet *, u_long, caddr_t); 128 static void ath_fatal_proc(void *, int); 129 static void ath_rxorn_proc(void *, int); 130 static void ath_bmiss_proc(void *, int); 131 static int ath_key_alloc(struct ieee80211com *, 132 const struct ieee80211_key *, 133 ieee80211_keyix *, ieee80211_keyix *); 134 static int ath_key_delete(struct ieee80211com *, 135 const struct ieee80211_key *); 136 static int ath_key_set(struct ieee80211com *, const struct ieee80211_key *, 137 const u_int8_t mac[IEEE80211_ADDR_LEN]); 138 static void ath_key_update_begin(struct ieee80211com *); 139 static void ath_key_update_end(struct ieee80211com *); 140 static void ath_mode_init(struct ath_softc *); 141 static void ath_setslottime(struct ath_softc *); 142 static void ath_updateslot(struct ifnet *); 143 static int ath_beaconq_setup(struct ath_hal *); 144 static int ath_beacon_alloc(struct ath_softc *, struct ieee80211_node *); 145 static void ath_beacon_setup(struct ath_softc *, struct ath_buf *); 146 static void ath_beacon_proc(void *, int); 147 static void ath_bstuck_proc(void *, int); 148 static void ath_beacon_free(struct ath_softc *); 149 static void ath_beacon_config(struct ath_softc *); 150 static void ath_descdma_cleanup(struct ath_softc *sc, 151 struct ath_descdma *, ath_bufhead *); 152 static int ath_desc_alloc(struct ath_softc *); 153 static void ath_desc_free(struct ath_softc *); 154 static struct ieee80211_node *ath_node_alloc(struct ieee80211_node_table *); 155 static void ath_node_free(struct ieee80211_node *); 156 static u_int8_t ath_node_getrssi(const struct ieee80211_node *); 157 static int ath_rxbuf_init(struct ath_softc *, struct ath_buf *); 158 static void ath_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 159 struct ieee80211_node *ni, 160 int subtype, int rssi, u_int32_t rstamp); 161 static void ath_setdefantenna(struct ath_softc *, u_int); 162 static void ath_rx_proc(void *, int); 163 static struct ath_txq *ath_txq_setup(struct ath_softc*, int qtype, int subtype); 164 static int ath_tx_setup(struct ath_softc *, int, int); 165 static int ath_wme_update(struct ieee80211com *); 166 static void ath_tx_cleanupq(struct ath_softc *, struct ath_txq *); 167 static void ath_tx_cleanup(struct ath_softc *); 168 static int ath_tx_start(struct ath_softc *, struct ieee80211_node *, 169 struct ath_buf *, struct mbuf *); 170 static void ath_tx_proc_q0(void *, int); 171 static void ath_tx_proc_q0123(void *, int); 172 static void ath_tx_proc(void *, int); 173 static int ath_chan_set(struct ath_softc *, struct ieee80211_channel *); 174 static void ath_draintxq(struct ath_softc *); 175 static void ath_stoprecv(struct ath_softc *); 176 static int ath_startrecv(struct ath_softc *); 177 static void ath_chan_change(struct ath_softc *, struct ieee80211_channel *); 178 static void ath_next_scan(void *); 179 static void ath_calibrate(void *); 180 static int ath_newstate(struct ieee80211com *, enum ieee80211_state, int); 181 static void ath_setup_stationkey(struct ieee80211_node *); 182 static void ath_newassoc(struct ieee80211_node *, int); 183 static int ath_getchannels(struct ath_softc *, u_int cc, 184 HAL_BOOL outdoor, HAL_BOOL xchanmode); 185 static void ath_led_event(struct ath_softc *, int); 186 static void ath_update_txpow(struct ath_softc *); 187 188 static int ath_rate_setup(struct ath_softc *, u_int mode); 189 static void ath_setcurmode(struct ath_softc *, enum ieee80211_phymode); 190 191 #ifdef __NetBSD__ 192 int ath_enable(struct ath_softc *); 193 void ath_disable(struct ath_softc *); 194 void ath_power(int, void *); 195 #endif 196 197 static void ath_bpfattach(struct ath_softc *); 198 static void ath_announce(struct ath_softc *); 199 200 int ath_dwelltime = 200; /* 5 channels/second */ 201 int ath_calinterval = 30; /* calibrate every 30 secs */ 202 int ath_outdoor = AH_TRUE; /* outdoor operation */ 203 int ath_xchanmode = AH_TRUE; /* enable extended channels */ 204 int ath_countrycode = CTRY_DEFAULT; /* country code */ 205 int ath_regdomain = 0; /* regulatory domain */ 206 int ath_debug = 0; 207 208 #ifdef AR_DEBUG 209 enum { 210 ATH_DEBUG_XMIT = 0x00000001, /* basic xmit operation */ 211 ATH_DEBUG_XMIT_DESC = 0x00000002, /* xmit descriptors */ 212 ATH_DEBUG_RECV = 0x00000004, /* basic recv operation */ 213 ATH_DEBUG_RECV_DESC = 0x00000008, /* recv descriptors */ 214 ATH_DEBUG_RATE = 0x00000010, /* rate control */ 215 ATH_DEBUG_RESET = 0x00000020, /* reset processing */ 216 ATH_DEBUG_MODE = 0x00000040, /* mode init/setup */ 217 ATH_DEBUG_BEACON = 0x00000080, /* beacon handling */ 218 ATH_DEBUG_WATCHDOG = 0x00000100, /* watchdog timeout */ 219 ATH_DEBUG_INTR = 0x00001000, /* ISR */ 220 ATH_DEBUG_TX_PROC = 0x00002000, /* tx ISR proc */ 221 ATH_DEBUG_RX_PROC = 0x00004000, /* rx ISR proc */ 222 ATH_DEBUG_BEACON_PROC = 0x00008000, /* beacon ISR proc */ 223 ATH_DEBUG_CALIBRATE = 0x00010000, /* periodic calibration */ 224 ATH_DEBUG_KEYCACHE = 0x00020000, /* key cache management */ 225 ATH_DEBUG_STATE = 0x00040000, /* 802.11 state transitions */ 226 ATH_DEBUG_NODE = 0x00080000, /* node management */ 227 ATH_DEBUG_LED = 0x00100000, /* led management */ 228 ATH_DEBUG_FATAL = 0x80000000, /* fatal errors */ 229 ATH_DEBUG_ANY = 0xffffffff 230 }; 231 #define IFF_DUMPPKTS(sc, m) \ 232 ((sc->sc_debug & (m)) || \ 233 (sc->sc_if.if_flags & (IFF_DEBUG|IFF_LINK2)) == (IFF_DEBUG|IFF_LINK2)) 234 #define DPRINTF(sc, m, fmt, ...) do { \ 235 if (sc->sc_debug & (m)) \ 236 printf(fmt, __VA_ARGS__); \ 237 } while (0) 238 #define KEYPRINTF(sc, ix, hk, mac) do { \ 239 if (sc->sc_debug & ATH_DEBUG_KEYCACHE) \ 240 ath_keyprint(__func__, ix, hk, mac); \ 241 } while (0) 242 static void ath_printrxbuf(struct ath_buf *bf, int); 243 static void ath_printtxbuf(struct ath_buf *bf, int); 244 #else 245 #define IFF_DUMPPKTS(sc, m) \ 246 ((sc->sc_if.if_flags & (IFF_DEBUG|IFF_LINK2)) == (IFF_DEBUG|IFF_LINK2)) 247 #define DPRINTF(m, fmt, ...) 248 #define KEYPRINTF(sc, k, ix, mac) 249 #endif 250 251 #ifdef __NetBSD__ 252 int 253 ath_activate(struct device *self, enum devact act) 254 { 255 struct ath_softc *sc = (struct ath_softc *)self; 256 int rv = 0, s; 257 258 s = splnet(); 259 switch (act) { 260 case DVACT_ACTIVATE: 261 rv = EOPNOTSUPP; 262 break; 263 case DVACT_DEACTIVATE: 264 if_deactivate(&sc->sc_if); 265 break; 266 } 267 splx(s); 268 return rv; 269 } 270 271 int 272 ath_enable(struct ath_softc *sc) 273 { 274 if (ATH_IS_ENABLED(sc) == 0) { 275 if (sc->sc_enable != NULL && (*sc->sc_enable)(sc) != 0) { 276 printf("%s: device enable failed\n", 277 sc->sc_dev.dv_xname); 278 return (EIO); 279 } 280 sc->sc_flags |= ATH_ENABLED; 281 } 282 return (0); 283 } 284 285 void 286 ath_disable(struct ath_softc *sc) 287 { 288 if (!ATH_IS_ENABLED(sc)) 289 return; 290 if (sc->sc_disable != NULL) 291 (*sc->sc_disable)(sc); 292 sc->sc_flags &= ~ATH_ENABLED; 293 } 294 #endif /* __NetBSD__ */ 295 296 MALLOC_DEFINE(M_ATHDEV, "athdev", "ath driver dma buffers"); 297 298 int 299 ath_attach(u_int16_t devid, struct ath_softc *sc) 300 { 301 struct ifnet *ifp = &sc->sc_if; 302 struct ieee80211com *ic = &sc->sc_ic; 303 struct ath_hal *ah = NULL; 304 HAL_STATUS status; 305 int error = 0, i; 306 307 DPRINTF(sc, ATH_DEBUG_ANY, "%s: devid 0x%x\n", __func__, devid); 308 309 memcpy(ifp->if_xname, sc->sc_dev.dv_xname, IFNAMSIZ); 310 311 ah = ath_hal_attach(devid, sc, sc->sc_st, ATH_BUSHANDLE2HAL(sc->sc_sh), 312 &status); 313 if (ah == NULL) { 314 if_printf(ifp, "unable to attach hardware; HAL status %u\n", 315 status); 316 error = ENXIO; 317 goto bad; 318 } 319 if (ah->ah_abi != HAL_ABI_VERSION) { 320 if_printf(ifp, "HAL ABI mismatch detected " 321 "(HAL:0x%x != driver:0x%x)\n", 322 ah->ah_abi, HAL_ABI_VERSION); 323 error = ENXIO; 324 goto bad; 325 } 326 sc->sc_ah = ah; 327 sc->sc_invalid = 0; /* ready to go, enable interrupt handling */ 328 329 /* 330 * Check if the MAC has multi-rate retry support. 331 * We do this by trying to setup a fake extended 332 * descriptor. MAC's that don't have support will 333 * return false w/o doing anything. MAC's that do 334 * support it will return true w/o doing anything. 335 */ 336 sc->sc_mrretry = ath_hal_setupxtxdesc(ah, NULL, 0,0, 0,0, 0,0); 337 338 /* 339 * Check if the device has hardware counters for PHY 340 * errors. If so we need to enable the MIB interrupt 341 * so we can act on stat triggers. 342 */ 343 if (ath_hal_hwphycounters(ah)) 344 sc->sc_needmib = 1; 345 346 /* 347 * Get the hardware key cache size. 348 */ 349 sc->sc_keymax = ath_hal_keycachesize(ah); 350 if (sc->sc_keymax > ATH_KEYMAX) { 351 if_printf(ifp, "Warning, using only %u of %u key cache slots\n", 352 ATH_KEYMAX, sc->sc_keymax); 353 sc->sc_keymax = ATH_KEYMAX; 354 } 355 /* 356 * Reset the key cache since some parts do not 357 * reset the contents on initial power up. 358 */ 359 for (i = 0; i < sc->sc_keymax; i++) 360 ath_hal_keyreset(ah, i); 361 /* 362 * Mark key cache slots associated with global keys 363 * as in use. If we knew TKIP was not to be used we 364 * could leave the +32, +64, and +32+64 slots free. 365 * XXX only for splitmic. 366 */ 367 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 368 setbit(sc->sc_keymap, i); 369 setbit(sc->sc_keymap, i+32); 370 setbit(sc->sc_keymap, i+64); 371 setbit(sc->sc_keymap, i+32+64); 372 } 373 374 /* 375 * Collect the channel list using the default country 376 * code and including outdoor channels. The 802.11 layer 377 * is resposible for filtering this list based on settings 378 * like the phy mode. 379 */ 380 error = ath_getchannels(sc, ath_countrycode, 381 ath_outdoor, ath_xchanmode); 382 if (error != 0) 383 goto bad; 384 385 /* 386 * Setup rate tables for all potential media types. 387 */ 388 ath_rate_setup(sc, IEEE80211_MODE_11A); 389 ath_rate_setup(sc, IEEE80211_MODE_11B); 390 ath_rate_setup(sc, IEEE80211_MODE_11G); 391 ath_rate_setup(sc, IEEE80211_MODE_TURBO_A); 392 ath_rate_setup(sc, IEEE80211_MODE_TURBO_G); 393 /* NB: setup here so ath_rate_update is happy */ 394 ath_setcurmode(sc, IEEE80211_MODE_11A); 395 396 /* 397 * Allocate tx+rx descriptors and populate the lists. 398 */ 399 error = ath_desc_alloc(sc); 400 if (error != 0) { 401 if_printf(ifp, "failed to allocate descriptors: %d\n", error); 402 goto bad; 403 } 404 ATH_CALLOUT_INIT(&sc->sc_scan_ch, debug_mpsafenet ? CALLOUT_MPSAFE : 0); 405 ATH_CALLOUT_INIT(&sc->sc_cal_ch, CALLOUT_MPSAFE); 406 407 ATH_TXBUF_LOCK_INIT(sc); 408 409 TASK_INIT(&sc->sc_rxtask, 0, ath_rx_proc, sc); 410 TASK_INIT(&sc->sc_rxorntask, 0, ath_rxorn_proc, sc); 411 TASK_INIT(&sc->sc_fataltask, 0, ath_fatal_proc, sc); 412 TASK_INIT(&sc->sc_bmisstask, 0, ath_bmiss_proc, sc); 413 TASK_INIT(&sc->sc_bstucktask, 0, ath_bstuck_proc, sc); 414 415 /* 416 * Allocate hardware transmit queues: one queue for 417 * beacon frames and one data queue for each QoS 418 * priority. Note that the hal handles reseting 419 * these queues at the needed time. 420 * 421 * XXX PS-Poll 422 */ 423 sc->sc_bhalq = ath_beaconq_setup(ah); 424 if (sc->sc_bhalq == (u_int) -1) { 425 if_printf(ifp, "unable to setup a beacon xmit queue!\n"); 426 error = EIO; 427 goto bad2; 428 } 429 sc->sc_cabq = ath_txq_setup(sc, HAL_TX_QUEUE_CAB, 0); 430 if (sc->sc_cabq == NULL) { 431 if_printf(ifp, "unable to setup CAB xmit queue!\n"); 432 error = EIO; 433 goto bad2; 434 } 435 /* NB: insure BK queue is the lowest priority h/w queue */ 436 if (!ath_tx_setup(sc, WME_AC_BK, HAL_WME_AC_BK)) { 437 if_printf(ifp, "unable to setup xmit queue for %s traffic!\n", 438 ieee80211_wme_acnames[WME_AC_BK]); 439 error = EIO; 440 goto bad2; 441 } 442 if (!ath_tx_setup(sc, WME_AC_BE, HAL_WME_AC_BE) || 443 !ath_tx_setup(sc, WME_AC_VI, HAL_WME_AC_VI) || 444 !ath_tx_setup(sc, WME_AC_VO, HAL_WME_AC_VO)) { 445 /* 446 * Not enough hardware tx queues to properly do WME; 447 * just punt and assign them all to the same h/w queue. 448 * We could do a better job of this if, for example, 449 * we allocate queues when we switch from station to 450 * AP mode. 451 */ 452 if (sc->sc_ac2q[WME_AC_VI] != NULL) 453 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_VI]); 454 if (sc->sc_ac2q[WME_AC_BE] != NULL) 455 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_BE]); 456 sc->sc_ac2q[WME_AC_BE] = sc->sc_ac2q[WME_AC_BK]; 457 sc->sc_ac2q[WME_AC_VI] = sc->sc_ac2q[WME_AC_BK]; 458 sc->sc_ac2q[WME_AC_VO] = sc->sc_ac2q[WME_AC_BK]; 459 } 460 461 /* 462 * Special case certain configurations. Note the 463 * CAB queue is handled by these specially so don't 464 * include them when checking the txq setup mask. 465 */ 466 switch (sc->sc_txqsetup &~ (1<<sc->sc_cabq->axq_qnum)) { 467 case 0x01: 468 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0, sc); 469 break; 470 case 0x0f: 471 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0123, sc); 472 break; 473 default: 474 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc, sc); 475 break; 476 } 477 478 /* 479 * Setup rate control. Some rate control modules 480 * call back to change the anntena state so expose 481 * the necessary entry points. 482 * XXX maybe belongs in struct ath_ratectrl? 483 */ 484 sc->sc_setdefantenna = ath_setdefantenna; 485 sc->sc_rc = ath_rate_attach(sc); 486 if (sc->sc_rc == NULL) { 487 error = EIO; 488 goto bad2; 489 } 490 491 sc->sc_blinking = 0; 492 sc->sc_ledstate = 1; 493 sc->sc_ledon = 0; /* low true */ 494 sc->sc_ledidle = (2700*hz)/1000; /* 2.7sec */ 495 ATH_CALLOUT_INIT(&sc->sc_ledtimer, CALLOUT_MPSAFE); 496 /* 497 * Auto-enable soft led processing for IBM cards and for 498 * 5211 minipci cards. Users can also manually enable/disable 499 * support with a sysctl. 500 */ 501 sc->sc_softled = (devid == AR5212_DEVID_IBM || devid == AR5211_DEVID); 502 if (sc->sc_softled) { 503 ath_hal_gpioCfgOutput(ah, sc->sc_ledpin); 504 ath_hal_gpioset(ah, sc->sc_ledpin, !sc->sc_ledon); 505 } 506 507 ifp->if_softc = sc; 508 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 509 ifp->if_start = ath_start; 510 ifp->if_watchdog = ath_watchdog; 511 ifp->if_ioctl = ath_ioctl; 512 ifp->if_init = ath_ifinit; 513 IFQ_SET_READY(&ifp->if_snd); 514 515 ic->ic_ifp = ifp; 516 ic->ic_reset = ath_reset; 517 ic->ic_newassoc = ath_newassoc; 518 ic->ic_updateslot = ath_updateslot; 519 ic->ic_wme.wme_update = ath_wme_update; 520 /* XXX not right but it's not used anywhere important */ 521 ic->ic_phytype = IEEE80211_T_OFDM; 522 ic->ic_opmode = IEEE80211_M_STA; 523 ic->ic_caps = 524 IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ 525 | IEEE80211_C_HOSTAP /* hostap mode */ 526 | IEEE80211_C_MONITOR /* monitor mode */ 527 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 528 | IEEE80211_C_SHSLOT /* short slot time supported */ 529 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ 530 ; 531 /* 532 * Query the hal to figure out h/w crypto support. 533 */ 534 if (ath_hal_ciphersupported(ah, HAL_CIPHER_WEP)) 535 ic->ic_caps |= IEEE80211_C_WEP; 536 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_OCB)) 537 ic->ic_caps |= IEEE80211_C_AES; 538 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_CCM)) 539 ic->ic_caps |= IEEE80211_C_AES_CCM; 540 if (ath_hal_ciphersupported(ah, HAL_CIPHER_CKIP)) 541 ic->ic_caps |= IEEE80211_C_CKIP; 542 if (ath_hal_ciphersupported(ah, HAL_CIPHER_TKIP)) { 543 ic->ic_caps |= IEEE80211_C_TKIP; 544 /* 545 * Check if h/w does the MIC and/or whether the 546 * separate key cache entries are required to 547 * handle both tx+rx MIC keys. 548 */ 549 if (ath_hal_ciphersupported(ah, HAL_CIPHER_MIC)) 550 ic->ic_caps |= IEEE80211_C_TKIPMIC; 551 if (ath_hal_tkipsplit(ah)) 552 sc->sc_splitmic = 1; 553 } 554 sc->sc_hasclrkey = ath_hal_ciphersupported(ah, HAL_CIPHER_CLR); 555 sc->sc_mcastkey = ath_hal_getmcastkeysearch(ah); 556 /* 557 * TPC support can be done either with a global cap or 558 * per-packet support. The latter is not available on 559 * all parts. We're a bit pedantic here as all parts 560 * support a global cap. 561 */ 562 if (ath_hal_hastpc(ah) || ath_hal_hastxpowlimit(ah)) 563 ic->ic_caps |= IEEE80211_C_TXPMGT; 564 565 /* 566 * Mark WME capability only if we have sufficient 567 * hardware queues to do proper priority scheduling. 568 */ 569 if (sc->sc_ac2q[WME_AC_BE] != sc->sc_ac2q[WME_AC_BK]) 570 ic->ic_caps |= IEEE80211_C_WME; 571 /* 572 * Check for misc other capabilities. 573 */ 574 if (ath_hal_hasbursting(ah)) 575 ic->ic_caps |= IEEE80211_C_BURST; 576 577 /* 578 * Indicate we need the 802.11 header padded to a 579 * 32-bit boundary for 4-address and QoS frames. 580 */ 581 ic->ic_flags |= IEEE80211_F_DATAPAD; 582 583 /* 584 * Query the hal about antenna support. 585 */ 586 sc->sc_defant = ath_hal_getdefantenna(ah); 587 588 /* 589 * Not all chips have the VEOL support we want to 590 * use with IBSS beacons; check here for it. 591 */ 592 sc->sc_hasveol = ath_hal_hasveol(ah); 593 594 /* get mac address from hardware */ 595 ath_hal_getmac(ah, ic->ic_myaddr); 596 597 if_attach(ifp); 598 /* call MI attach routine. */ 599 ieee80211_ifattach(ic); 600 /* override default methods */ 601 ic->ic_node_alloc = ath_node_alloc; 602 sc->sc_node_free = ic->ic_node_free; 603 ic->ic_node_free = ath_node_free; 604 ic->ic_node_getrssi = ath_node_getrssi; 605 sc->sc_recv_mgmt = ic->ic_recv_mgmt; 606 ic->ic_recv_mgmt = ath_recv_mgmt; 607 sc->sc_newstate = ic->ic_newstate; 608 ic->ic_newstate = ath_newstate; 609 ic->ic_crypto.cs_max_keyix = sc->sc_keymax; 610 ic->ic_crypto.cs_key_alloc = ath_key_alloc; 611 ic->ic_crypto.cs_key_delete = ath_key_delete; 612 ic->ic_crypto.cs_key_set = ath_key_set; 613 ic->ic_crypto.cs_key_update_begin = ath_key_update_begin; 614 ic->ic_crypto.cs_key_update_end = ath_key_update_end; 615 /* complete initialization */ 616 ieee80211_media_init(ic, ath_media_change, ieee80211_media_status); 617 618 ath_bpfattach(sc); 619 620 #ifdef __NetBSD__ 621 sc->sc_flags |= ATH_ATTACHED; 622 /* 623 * Make sure the interface is shutdown during reboot. 624 */ 625 sc->sc_sdhook = shutdownhook_establish(ath_shutdown, sc); 626 if (sc->sc_sdhook == NULL) 627 printf("%s: WARNING: unable to establish shutdown hook\n", 628 sc->sc_dev.dv_xname); 629 sc->sc_powerhook = powerhook_establish(ath_power, sc); 630 if (sc->sc_powerhook == NULL) 631 printf("%s: WARNING: unable to establish power hook\n", 632 sc->sc_dev.dv_xname); 633 #endif 634 635 /* 636 * Setup dynamic sysctl's now that country code and 637 * regdomain are available from the hal. 638 */ 639 ath_sysctlattach(sc); 640 641 ieee80211_announce(ic); 642 ath_announce(sc); 643 return 0; 644 bad2: 645 ath_tx_cleanup(sc); 646 ath_desc_free(sc); 647 bad: 648 if (ah) 649 ath_hal_detach(ah); 650 sc->sc_invalid = 1; 651 return error; 652 } 653 654 int 655 ath_detach(struct ath_softc *sc) 656 { 657 struct ifnet *ifp = &sc->sc_if; 658 int s; 659 660 if ((sc->sc_flags & ATH_ATTACHED) == 0) 661 return (0); 662 663 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 664 __func__, ifp->if_flags); 665 666 s = splnet(); 667 ath_stop(ifp, 1); 668 #if NBPFILTER > 0 669 bpfdetach(ifp); 670 #endif 671 /* 672 * NB: the order of these is important: 673 * o call the 802.11 layer before detaching the hal to 674 * insure callbacks into the driver to delete global 675 * key cache entries can be handled 676 * o reclaim the tx queue data structures after calling 677 * the 802.11 layer as we'll get called back to reclaim 678 * node state and potentially want to use them 679 * o to cleanup the tx queues the hal is called, so detach 680 * it last 681 * Other than that, it's straightforward... 682 */ 683 ieee80211_ifdetach(&sc->sc_ic); 684 ath_rate_detach(sc->sc_rc); 685 ath_desc_free(sc); 686 ath_tx_cleanup(sc); 687 sysctl_teardown(&sc->sc_sysctllog); 688 ath_hal_detach(sc->sc_ah); 689 if_detach(ifp); 690 splx(s); 691 powerhook_disestablish(sc->sc_powerhook); 692 shutdownhook_disestablish(sc->sc_sdhook); 693 694 return 0; 695 } 696 697 #ifdef __NetBSD__ 698 void 699 ath_power(int why, void *arg) 700 { 701 struct ath_softc *sc = arg; 702 int s; 703 704 DPRINTF(sc, ATH_DEBUG_ANY, "ath_power(%d)\n", why); 705 706 s = splnet(); 707 switch (why) { 708 case PWR_SUSPEND: 709 case PWR_STANDBY: 710 ath_suspend(sc, why); 711 break; 712 case PWR_RESUME: 713 ath_resume(sc, why); 714 break; 715 case PWR_SOFTSUSPEND: 716 case PWR_SOFTSTANDBY: 717 case PWR_SOFTRESUME: 718 break; 719 } 720 splx(s); 721 } 722 #endif 723 724 void 725 ath_suspend(struct ath_softc *sc, int why) 726 { 727 struct ifnet *ifp = &sc->sc_if; 728 729 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 730 __func__, ifp->if_flags); 731 732 ath_stop(ifp, 1); 733 if (sc->sc_power != NULL) 734 (*sc->sc_power)(sc, why); 735 } 736 737 void 738 ath_resume(struct ath_softc *sc, int why) 739 { 740 struct ifnet *ifp = &sc->sc_if; 741 742 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 743 __func__, ifp->if_flags); 744 745 if (ifp->if_flags & IFF_UP) { 746 ath_init(sc); 747 #if 0 748 (void)ath_intr(sc); 749 #endif 750 if (sc->sc_power != NULL) 751 (*sc->sc_power)(sc, why); 752 if (ifp->if_flags & IFF_RUNNING) 753 ath_start(ifp); 754 } 755 if (sc->sc_softled) { 756 ath_hal_gpioCfgOutput(sc->sc_ah, sc->sc_ledpin); 757 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, !sc->sc_ledon); 758 } 759 } 760 761 void 762 ath_shutdown(void *arg) 763 { 764 struct ath_softc *sc = arg; 765 766 ath_stop(&sc->sc_if, 1); 767 } 768 769 /* 770 * Interrupt handler. Most of the actual processing is deferred. 771 */ 772 int 773 ath_intr(void *arg) 774 { 775 struct ath_softc *sc = arg; 776 struct ifnet *ifp = &sc->sc_if; 777 struct ath_hal *ah = sc->sc_ah; 778 HAL_INT status; 779 780 if (sc->sc_invalid) { 781 /* 782 * The hardware is not ready/present, don't touch anything. 783 * Note this can happen early on if the IRQ is shared. 784 */ 785 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid; ignored\n", __func__); 786 return 0; 787 } 788 if (!ath_hal_intrpend(ah)) /* shared irq, not for us */ 789 return 0; 790 if ((ifp->if_flags & (IFF_RUNNING|IFF_UP)) != (IFF_RUNNING|IFF_UP)) { 791 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 792 __func__, ifp->if_flags); 793 ath_hal_getisr(ah, &status); /* clear ISR */ 794 ath_hal_intrset(ah, 0); /* disable further intr's */ 795 return 1; /* XXX */ 796 } 797 /* 798 * Figure out the reason(s) for the interrupt. Note 799 * that the hal returns a pseudo-ISR that may include 800 * bits we haven't explicitly enabled so we mask the 801 * value to insure we only process bits we requested. 802 */ 803 ath_hal_getisr(ah, &status); /* NB: clears ISR too */ 804 DPRINTF(sc, ATH_DEBUG_INTR, "%s: status 0x%x\n", __func__, status); 805 status &= sc->sc_imask; /* discard unasked for bits */ 806 if (status & HAL_INT_FATAL) { 807 /* 808 * Fatal errors are unrecoverable. Typically 809 * these are caused by DMA errors. Unfortunately 810 * the exact reason is not (presently) returned 811 * by the hal. 812 */ 813 sc->sc_stats.ast_hardware++; 814 ath_hal_intrset(ah, 0); /* disable intr's until reset */ 815 TASK_RUN_OR_ENQUEUE(&sc->sc_fataltask); 816 } else if (status & HAL_INT_RXORN) { 817 sc->sc_stats.ast_rxorn++; 818 ath_hal_intrset(ah, 0); /* disable intr's until reset */ 819 TASK_RUN_OR_ENQUEUE(&sc->sc_rxorntask); 820 } else { 821 if (status & HAL_INT_SWBA) { 822 /* 823 * Software beacon alert--time to send a beacon. 824 * Handle beacon transmission directly; deferring 825 * this is too slow to meet timing constraints 826 * under load. 827 */ 828 ath_beacon_proc(sc, 0); 829 } 830 if (status & HAL_INT_RXEOL) { 831 /* 832 * NB: the hardware should re-read the link when 833 * RXE bit is written, but it doesn't work at 834 * least on older hardware revs. 835 */ 836 sc->sc_stats.ast_rxeol++; 837 sc->sc_rxlink = NULL; 838 } 839 if (status & HAL_INT_TXURN) { 840 sc->sc_stats.ast_txurn++; 841 /* bump tx trigger level */ 842 ath_hal_updatetxtriglevel(ah, AH_TRUE); 843 } 844 if (status & HAL_INT_RX) 845 TASK_RUN_OR_ENQUEUE(&sc->sc_rxtask); 846 if (status & HAL_INT_TX) 847 TASK_RUN_OR_ENQUEUE(&sc->sc_txtask); 848 if (status & HAL_INT_BMISS) { 849 sc->sc_stats.ast_bmiss++; 850 TASK_RUN_OR_ENQUEUE(&sc->sc_bmisstask); 851 } 852 if (status & HAL_INT_MIB) { 853 sc->sc_stats.ast_mib++; 854 /* 855 * Disable interrupts until we service the MIB 856 * interrupt; otherwise it will continue to fire. 857 */ 858 ath_hal_intrset(ah, 0); 859 /* 860 * Let the hal handle the event. We assume it will 861 * clear whatever condition caused the interrupt. 862 */ 863 ath_hal_mibevent(ah, 864 &ATH_NODE(sc->sc_ic.ic_bss)->an_halstats); 865 ath_hal_intrset(ah, sc->sc_imask); 866 } 867 } 868 return 1; 869 } 870 871 static void 872 ath_fatal_proc(void *arg, int pending) 873 { 874 struct ath_softc *sc = arg; 875 struct ifnet *ifp = &sc->sc_if; 876 877 if_printf(ifp, "hardware error; resetting\n"); 878 ath_reset(ifp); 879 } 880 881 static void 882 ath_rxorn_proc(void *arg, int pending) 883 { 884 struct ath_softc *sc = arg; 885 struct ifnet *ifp = &sc->sc_if; 886 887 if_printf(ifp, "rx FIFO overrun; resetting\n"); 888 ath_reset(ifp); 889 } 890 891 static void 892 ath_bmiss_proc(void *arg, int pending) 893 { 894 struct ath_softc *sc = arg; 895 struct ieee80211com *ic = &sc->sc_ic; 896 897 DPRINTF(sc, ATH_DEBUG_ANY, "%s: pending %u\n", __func__, pending); 898 KASSERT(ic->ic_opmode == IEEE80211_M_STA, 899 ("unexpect operating mode %u", ic->ic_opmode)); 900 if (ic->ic_state == IEEE80211_S_RUN) { 901 /* 902 * Rather than go directly to scan state, try to 903 * reassociate first. If that fails then the state 904 * machine will drop us into scanning after timing 905 * out waiting for a probe response. 906 */ 907 NET_LOCK_GIANT(); 908 ieee80211_new_state(ic, IEEE80211_S_ASSOC, -1); 909 NET_UNLOCK_GIANT(); 910 } 911 } 912 913 static u_int 914 ath_chan2flags(struct ieee80211com *ic, struct ieee80211_channel *chan) 915 { 916 #define N(a) (sizeof(a) / sizeof(a[0])) 917 static const u_int modeflags[] = { 918 0, /* IEEE80211_MODE_AUTO */ 919 CHANNEL_A, /* IEEE80211_MODE_11A */ 920 CHANNEL_B, /* IEEE80211_MODE_11B */ 921 CHANNEL_PUREG, /* IEEE80211_MODE_11G */ 922 0, /* IEEE80211_MODE_FH */ 923 CHANNEL_T, /* IEEE80211_MODE_TURBO_A */ 924 CHANNEL_108G /* IEEE80211_MODE_TURBO_G */ 925 }; 926 enum ieee80211_phymode mode = ieee80211_chan2mode(ic, chan); 927 928 KASSERT(mode < N(modeflags), ("unexpected phy mode %u", mode)); 929 KASSERT(modeflags[mode] != 0, ("mode %u undefined", mode)); 930 return modeflags[mode]; 931 #undef N 932 } 933 934 static int 935 ath_ifinit(struct ifnet *ifp) 936 { 937 struct ath_softc *sc = (struct ath_softc *)ifp->if_softc; 938 939 return ath_init(sc); 940 } 941 942 static int 943 ath_init(struct ath_softc *sc) 944 { 945 struct ifnet *ifp = &sc->sc_if; 946 struct ieee80211com *ic = &sc->sc_ic; 947 struct ath_hal *ah = sc->sc_ah; 948 HAL_STATUS status; 949 int error = 0; 950 951 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 952 __func__, ifp->if_flags); 953 954 ATH_LOCK(sc); 955 956 if ((error = ath_enable(sc)) != 0) 957 return error; 958 959 /* 960 * Stop anything previously setup. This is safe 961 * whether this is the first time through or not. 962 */ 963 ath_stop_locked(ifp, 0); 964 965 /* 966 * The basic interface to setting the hardware in a good 967 * state is ``reset''. On return the hardware is known to 968 * be powered up and with interrupts disabled. This must 969 * be followed by initialization of the appropriate bits 970 * and then setup of the interrupt mask. 971 */ 972 sc->sc_curchan.channel = ic->ic_curchan->ic_freq; 973 sc->sc_curchan.channelFlags = ath_chan2flags(ic, ic->ic_curchan); 974 if (!ath_hal_reset(ah, ic->ic_opmode, &sc->sc_curchan, AH_FALSE, &status)) { 975 if_printf(ifp, "unable to reset hardware; hal status %u\n", 976 status); 977 error = EIO; 978 goto done; 979 } 980 981 /* 982 * This is needed only to setup initial state 983 * but it's best done after a reset. 984 */ 985 ath_update_txpow(sc); 986 /* 987 * Likewise this is set during reset so update 988 * state cached in the driver. 989 */ 990 sc->sc_diversity = ath_hal_getdiversity(ah); 991 992 /* 993 * Setup the hardware after reset: the key cache 994 * is filled as needed and the receive engine is 995 * set going. Frame transmit is handled entirely 996 * in the frame output path; there's nothing to do 997 * here except setup the interrupt mask. 998 */ 999 if ((error = ath_startrecv(sc)) != 0) { 1000 if_printf(ifp, "unable to start recv logic\n"); 1001 goto done; 1002 } 1003 1004 /* 1005 * Enable interrupts. 1006 */ 1007 sc->sc_imask = HAL_INT_RX | HAL_INT_TX 1008 | HAL_INT_RXEOL | HAL_INT_RXORN 1009 | HAL_INT_FATAL | HAL_INT_GLOBAL; 1010 /* 1011 * Enable MIB interrupts when there are hardware phy counters. 1012 * Note we only do this (at the moment) for station mode. 1013 */ 1014 if (sc->sc_needmib && ic->ic_opmode == IEEE80211_M_STA) 1015 sc->sc_imask |= HAL_INT_MIB; 1016 ath_hal_intrset(ah, sc->sc_imask); 1017 1018 ifp->if_flags |= IFF_RUNNING; 1019 ic->ic_state = IEEE80211_S_INIT; 1020 1021 /* 1022 * The hardware should be ready to go now so it's safe 1023 * to kick the 802.11 state machine as it's likely to 1024 * immediately call back to us to send mgmt frames. 1025 */ 1026 ath_chan_change(sc, ic->ic_curchan); 1027 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 1028 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 1029 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 1030 } else 1031 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 1032 done: 1033 ATH_UNLOCK(sc); 1034 return error; 1035 } 1036 1037 static void 1038 ath_stop_locked(struct ifnet *ifp, int disable) 1039 { 1040 struct ath_softc *sc = ifp->if_softc; 1041 struct ieee80211com *ic = &sc->sc_ic; 1042 struct ath_hal *ah = sc->sc_ah; 1043 1044 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid %u if_flags 0x%x\n", 1045 __func__, sc->sc_invalid, ifp->if_flags); 1046 1047 ATH_LOCK_ASSERT(sc); 1048 if (ifp->if_flags & IFF_RUNNING) { 1049 /* 1050 * Shutdown the hardware and driver: 1051 * reset 802.11 state machine 1052 * turn off timers 1053 * disable interrupts 1054 * turn off the radio 1055 * clear transmit machinery 1056 * clear receive machinery 1057 * drain and release tx queues 1058 * reclaim beacon resources 1059 * power down hardware 1060 * 1061 * Note that some of this work is not possible if the 1062 * hardware is gone (invalid). 1063 */ 1064 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 1065 ifp->if_flags &= ~IFF_RUNNING; 1066 ifp->if_timer = 0; 1067 if (!sc->sc_invalid) { 1068 if (sc->sc_softled) { 1069 callout_stop(&sc->sc_ledtimer); 1070 ath_hal_gpioset(ah, sc->sc_ledpin, 1071 !sc->sc_ledon); 1072 sc->sc_blinking = 0; 1073 } 1074 ath_hal_intrset(ah, 0); 1075 } 1076 ath_draintxq(sc); 1077 if (!sc->sc_invalid) { 1078 ath_stoprecv(sc); 1079 ath_hal_phydisable(ah); 1080 } else 1081 sc->sc_rxlink = NULL; 1082 IF_PURGE(&ifp->if_snd); 1083 ath_beacon_free(sc); 1084 if (disable) 1085 ath_disable(sc); 1086 } 1087 } 1088 1089 static void 1090 ath_stop(struct ifnet *ifp, int disable) 1091 { 1092 struct ath_softc *sc = ifp->if_softc; 1093 1094 ATH_LOCK(sc); 1095 ath_stop_locked(ifp, disable); 1096 if (!sc->sc_invalid) { 1097 /* 1098 * Set the chip in full sleep mode. Note that we are 1099 * careful to do this only when bringing the interface 1100 * completely to a stop. When the chip is in this state 1101 * it must be carefully woken up or references to 1102 * registers in the PCI clock domain may freeze the bus 1103 * (and system). This varies by chip and is mostly an 1104 * issue with newer parts that go to sleep more quickly. 1105 */ 1106 ath_hal_setpower(sc->sc_ah, HAL_PM_FULL_SLEEP, 0); 1107 } 1108 ATH_UNLOCK(sc); 1109 } 1110 1111 /* 1112 * Reset the hardware w/o losing operational state. This is 1113 * basically a more efficient way of doing ath_stop, ath_init, 1114 * followed by state transitions to the current 802.11 1115 * operational state. Used to recover from various errors and 1116 * to reset or reload hardware state. 1117 */ 1118 int 1119 ath_reset(struct ifnet *ifp) 1120 { 1121 struct ath_softc *sc = ifp->if_softc; 1122 struct ieee80211com *ic = &sc->sc_ic; 1123 struct ath_hal *ah = sc->sc_ah; 1124 struct ieee80211_channel *c; 1125 HAL_STATUS status; 1126 1127 /* 1128 * Convert to a HAL channel description with the flags 1129 * constrained to reflect the current operating mode. 1130 */ 1131 c = ic->ic_curchan; 1132 sc->sc_curchan.channel = c->ic_freq; 1133 sc->sc_curchan.channelFlags = ath_chan2flags(ic, c); 1134 1135 ath_hal_intrset(ah, 0); /* disable interrupts */ 1136 ath_draintxq(sc); /* stop xmit side */ 1137 ath_stoprecv(sc); /* stop recv side */ 1138 /* NB: indicate channel change so we do a full reset */ 1139 if (!ath_hal_reset(ah, ic->ic_opmode, &sc->sc_curchan, AH_TRUE, &status)) 1140 if_printf(ifp, "%s: unable to reset hardware; hal status %u\n", 1141 __func__, status); 1142 ath_update_txpow(sc); /* update tx power state */ 1143 sc->sc_diversity = ath_hal_getdiversity(ah); 1144 if (ath_startrecv(sc) != 0) /* restart recv */ 1145 if_printf(ifp, "%s: unable to start recv logic\n", __func__); 1146 /* 1147 * We may be doing a reset in response to an ioctl 1148 * that changes the channel so update any state that 1149 * might change as a result. 1150 */ 1151 ath_chan_change(sc, c); 1152 if (ic->ic_state == IEEE80211_S_RUN) 1153 ath_beacon_config(sc); /* restart beacons */ 1154 ath_hal_intrset(ah, sc->sc_imask); 1155 1156 ath_start(ifp); /* restart xmit */ 1157 return 0; 1158 } 1159 1160 static void 1161 ath_start(struct ifnet *ifp) 1162 { 1163 struct ath_softc *sc = ifp->if_softc; 1164 struct ath_hal *ah = sc->sc_ah; 1165 struct ieee80211com *ic = &sc->sc_ic; 1166 struct ieee80211_node *ni; 1167 struct ath_buf *bf; 1168 struct mbuf *m; 1169 struct ieee80211_frame *wh; 1170 struct ether_header *eh; 1171 1172 if ((ifp->if_flags & IFF_RUNNING) == 0 || sc->sc_invalid) 1173 return; 1174 for (;;) { 1175 /* 1176 * Grab a TX buffer and associated resources. 1177 */ 1178 ATH_TXBUF_LOCK(sc); 1179 bf = STAILQ_FIRST(&sc->sc_txbuf); 1180 if (bf != NULL) 1181 STAILQ_REMOVE_HEAD(&sc->sc_txbuf, bf_list); 1182 ATH_TXBUF_UNLOCK(sc); 1183 if (bf == NULL) { 1184 DPRINTF(sc, ATH_DEBUG_ANY, "%s: out of xmit buffers\n", 1185 __func__); 1186 sc->sc_stats.ast_tx_qstop++; 1187 ifp->if_flags |= IFF_OACTIVE; 1188 break; 1189 } 1190 /* 1191 * Poll the management queue for frames; they 1192 * have priority over normal data frames. 1193 */ 1194 IF_DEQUEUE(&ic->ic_mgtq, m); 1195 if (m == NULL) { 1196 /* 1197 * No data frames go out unless we're associated. 1198 */ 1199 if (ic->ic_state != IEEE80211_S_RUN) { 1200 DPRINTF(sc, ATH_DEBUG_ANY, 1201 "%s: ignore data packet, state %u\n", 1202 __func__, ic->ic_state); 1203 sc->sc_stats.ast_tx_discard++; 1204 ATH_TXBUF_LOCK(sc); 1205 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1206 ATH_TXBUF_UNLOCK(sc); 1207 break; 1208 } 1209 IFQ_DEQUEUE(&ifp->if_snd, m); /* XXX: LOCK */ 1210 if (m == NULL) { 1211 ATH_TXBUF_LOCK(sc); 1212 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1213 ATH_TXBUF_UNLOCK(sc); 1214 break; 1215 } 1216 /* 1217 * Find the node for the destination so we can do 1218 * things like power save and fast frames aggregation. 1219 */ 1220 if (m->m_len < sizeof(struct ether_header) && 1221 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 1222 ic->ic_stats.is_tx_nobuf++; /* XXX */ 1223 ni = NULL; 1224 goto bad; 1225 } 1226 eh = mtod(m, struct ether_header *); 1227 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 1228 if (ni == NULL) { 1229 /* NB: ieee80211_find_txnode does stat+msg */ 1230 m_freem(m); 1231 goto bad; 1232 } 1233 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1234 (m->m_flags & M_PWR_SAV) == 0) { 1235 /* 1236 * Station in power save mode; pass the frame 1237 * to the 802.11 layer and continue. We'll get 1238 * the frame back when the time is right. 1239 */ 1240 ieee80211_pwrsave(ic, ni, m); 1241 goto reclaim; 1242 } 1243 /* calculate priority so we can find the tx queue */ 1244 if (ieee80211_classify(ic, m, ni)) { 1245 DPRINTF(sc, ATH_DEBUG_XMIT, 1246 "%s: discard, classification failure\n", 1247 __func__); 1248 m_freem(m); 1249 goto bad; 1250 } 1251 ifp->if_opackets++; 1252 1253 #if NBPFILTER > 0 1254 if (ifp->if_bpf) 1255 bpf_mtap(ifp->if_bpf, m); 1256 #endif 1257 /* 1258 * Encapsulate the packet in prep for transmission. 1259 */ 1260 m = ieee80211_encap(ic, m, ni); 1261 if (m == NULL) { 1262 DPRINTF(sc, ATH_DEBUG_ANY, 1263 "%s: encapsulation failure\n", 1264 __func__); 1265 sc->sc_stats.ast_tx_encap++; 1266 goto bad; 1267 } 1268 } else { 1269 /* 1270 * Hack! The referenced node pointer is in the 1271 * rcvif field of the packet header. This is 1272 * placed there by ieee80211_mgmt_output because 1273 * we need to hold the reference with the frame 1274 * and there's no other way (other than packet 1275 * tags which we consider too expensive to use) 1276 * to pass it along. 1277 */ 1278 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 1279 m->m_pkthdr.rcvif = NULL; 1280 1281 wh = mtod(m, struct ieee80211_frame *); 1282 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1283 IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1284 /* fill time stamp */ 1285 u_int64_t tsf; 1286 u_int32_t *tstamp; 1287 1288 tsf = ath_hal_gettsf64(ah); 1289 /* XXX: adjust 100us delay to xmit */ 1290 tsf += 100; 1291 tstamp = (u_int32_t *)&wh[1]; 1292 tstamp[0] = htole32(tsf & 0xffffffff); 1293 tstamp[1] = htole32(tsf >> 32); 1294 } 1295 sc->sc_stats.ast_tx_mgmt++; 1296 } 1297 1298 if (ath_tx_start(sc, ni, bf, m)) { 1299 bad: 1300 ifp->if_oerrors++; 1301 reclaim: 1302 ATH_TXBUF_LOCK(sc); 1303 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1304 ATH_TXBUF_UNLOCK(sc); 1305 if (ni != NULL) 1306 ieee80211_free_node(ni); 1307 continue; 1308 } 1309 1310 sc->sc_tx_timer = 5; 1311 ifp->if_timer = 1; 1312 } 1313 } 1314 1315 static int 1316 ath_media_change(struct ifnet *ifp) 1317 { 1318 #define IS_UP(ifp) \ 1319 ((ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING)) 1320 int error; 1321 1322 error = ieee80211_media_change(ifp); 1323 if (error == ENETRESET) { 1324 if (IS_UP(ifp)) 1325 ath_init(ifp->if_softc); /* XXX lose error */ 1326 error = 0; 1327 } 1328 return error; 1329 #undef IS_UP 1330 } 1331 1332 #ifdef AR_DEBUG 1333 static void 1334 ath_keyprint(const char *tag, u_int ix, 1335 const HAL_KEYVAL *hk, const u_int8_t mac[IEEE80211_ADDR_LEN]) 1336 { 1337 static const char *ciphers[] = { 1338 "WEP", 1339 "AES-OCB", 1340 "AES-CCM", 1341 "CKIP", 1342 "TKIP", 1343 "CLR", 1344 }; 1345 int i, n; 1346 1347 printf("%s: [%02u] %-7s ", tag, ix, ciphers[hk->kv_type]); 1348 for (i = 0, n = hk->kv_len; i < n; i++) 1349 printf("%02x", hk->kv_val[i]); 1350 printf(" mac %s", ether_sprintf(mac)); 1351 if (hk->kv_type == HAL_CIPHER_TKIP) { 1352 printf(" mic "); 1353 for (i = 0; i < sizeof(hk->kv_mic); i++) 1354 printf("%02x", hk->kv_mic[i]); 1355 } 1356 printf("\n"); 1357 } 1358 #endif 1359 1360 /* 1361 * Set a TKIP key into the hardware. This handles the 1362 * potential distribution of key state to multiple key 1363 * cache slots for TKIP. 1364 */ 1365 static int 1366 ath_keyset_tkip(struct ath_softc *sc, const struct ieee80211_key *k, 1367 HAL_KEYVAL *hk, const u_int8_t mac[IEEE80211_ADDR_LEN]) 1368 { 1369 #define IEEE80211_KEY_XR (IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV) 1370 static const u_int8_t zerobssid[IEEE80211_ADDR_LEN]; 1371 struct ath_hal *ah = sc->sc_ah; 1372 1373 KASSERT(k->wk_cipher->ic_cipher == IEEE80211_CIPHER_TKIP, 1374 ("got a non-TKIP key, cipher %u", k->wk_cipher->ic_cipher)); 1375 KASSERT(sc->sc_splitmic, ("key cache !split")); 1376 if ((k->wk_flags & IEEE80211_KEY_XR) == IEEE80211_KEY_XR) { 1377 /* 1378 * TX key goes at first index, RX key at the rx index. 1379 * The hal handles the MIC keys at index+64. 1380 */ 1381 memcpy(hk->kv_mic, k->wk_txmic, sizeof(hk->kv_mic)); 1382 KEYPRINTF(sc, k->wk_keyix, hk, zerobssid); 1383 if (!ath_hal_keyset(ah, k->wk_keyix, hk, zerobssid)) 1384 return 0; 1385 1386 memcpy(hk->kv_mic, k->wk_rxmic, sizeof(hk->kv_mic)); 1387 KEYPRINTF(sc, k->wk_keyix+32, hk, mac); 1388 /* XXX delete tx key on failure? */ 1389 return ath_hal_keyset(ah, k->wk_keyix+32, hk, mac); 1390 } else if (k->wk_flags & IEEE80211_KEY_XR) { 1391 /* 1392 * TX/RX key goes at first index. 1393 * The hal handles the MIC keys are index+64. 1394 */ 1395 memcpy(hk->kv_mic, k->wk_flags & IEEE80211_KEY_XMIT ? 1396 k->wk_txmic : k->wk_rxmic, sizeof(hk->kv_mic)); 1397 KEYPRINTF(sc, k->wk_keyix, hk, mac); 1398 return ath_hal_keyset(ah, k->wk_keyix, hk, mac); 1399 } 1400 return 0; 1401 #undef IEEE80211_KEY_XR 1402 } 1403 1404 /* 1405 * Set a net80211 key into the hardware. This handles the 1406 * potential distribution of key state to multiple key 1407 * cache slots for TKIP with hardware MIC support. 1408 */ 1409 static int 1410 ath_keyset(struct ath_softc *sc, const struct ieee80211_key *k, 1411 const u_int8_t mac0[IEEE80211_ADDR_LEN], 1412 struct ieee80211_node *bss) 1413 { 1414 #define N(a) (sizeof(a)/sizeof(a[0])) 1415 static const u_int8_t ciphermap[] = { 1416 HAL_CIPHER_WEP, /* IEEE80211_CIPHER_WEP */ 1417 HAL_CIPHER_TKIP, /* IEEE80211_CIPHER_TKIP */ 1418 HAL_CIPHER_AES_OCB, /* IEEE80211_CIPHER_AES_OCB */ 1419 HAL_CIPHER_AES_CCM, /* IEEE80211_CIPHER_AES_CCM */ 1420 (u_int8_t) -1, /* 4 is not allocated */ 1421 HAL_CIPHER_CKIP, /* IEEE80211_CIPHER_CKIP */ 1422 HAL_CIPHER_CLR, /* IEEE80211_CIPHER_NONE */ 1423 }; 1424 struct ath_hal *ah = sc->sc_ah; 1425 const struct ieee80211_cipher *cip = k->wk_cipher; 1426 u_int8_t gmac[IEEE80211_ADDR_LEN]; 1427 const u_int8_t *mac; 1428 HAL_KEYVAL hk; 1429 1430 memset(&hk, 0, sizeof(hk)); 1431 /* 1432 * Software crypto uses a "clear key" so non-crypto 1433 * state kept in the key cache are maintained and 1434 * so that rx frames have an entry to match. 1435 */ 1436 if ((k->wk_flags & IEEE80211_KEY_SWCRYPT) == 0) { 1437 KASSERT(cip->ic_cipher < N(ciphermap), 1438 ("invalid cipher type %u", cip->ic_cipher)); 1439 hk.kv_type = ciphermap[cip->ic_cipher]; 1440 hk.kv_len = k->wk_keylen; 1441 memcpy(hk.kv_val, k->wk_key, k->wk_keylen); 1442 } else 1443 hk.kv_type = HAL_CIPHER_CLR; 1444 1445 if ((k->wk_flags & IEEE80211_KEY_GROUP) && sc->sc_mcastkey) { 1446 /* 1447 * Group keys on hardware that supports multicast frame 1448 * key search use a mac that is the sender's address with 1449 * the high bit set instead of the app-specified address. 1450 */ 1451 IEEE80211_ADDR_COPY(gmac, bss->ni_macaddr); 1452 gmac[0] |= 0x80; 1453 mac = gmac; 1454 } else 1455 mac = mac0; 1456 1457 if (hk.kv_type == HAL_CIPHER_TKIP && 1458 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && 1459 sc->sc_splitmic) { 1460 return ath_keyset_tkip(sc, k, &hk, mac); 1461 } else { 1462 KEYPRINTF(sc, k->wk_keyix, &hk, mac); 1463 return ath_hal_keyset(ah, k->wk_keyix, &hk, mac); 1464 } 1465 #undef N 1466 } 1467 1468 /* 1469 * Allocate tx/rx key slots for TKIP. We allocate two slots for 1470 * each key, one for decrypt/encrypt and the other for the MIC. 1471 */ 1472 static u_int16_t 1473 key_alloc_2pair(struct ath_softc *sc, 1474 ieee80211_keyix *txkeyix, ieee80211_keyix *rxkeyix) 1475 { 1476 #define N(a) (sizeof(a)/sizeof(a[0])) 1477 u_int i, keyix; 1478 1479 KASSERT(sc->sc_splitmic, ("key cache !split")); 1480 /* XXX could optimize */ 1481 for (i = 0; i < N(sc->sc_keymap)/4; i++) { 1482 u_int8_t b = sc->sc_keymap[i]; 1483 if (b != 0xff) { 1484 /* 1485 * One or more slots in this byte are free. 1486 */ 1487 keyix = i*NBBY; 1488 while (b & 1) { 1489 again: 1490 keyix++; 1491 b >>= 1; 1492 } 1493 /* XXX IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV */ 1494 if (isset(sc->sc_keymap, keyix+32) || 1495 isset(sc->sc_keymap, keyix+64) || 1496 isset(sc->sc_keymap, keyix+32+64)) { 1497 /* full pair unavailable */ 1498 /* XXX statistic */ 1499 if (keyix == (i+1)*NBBY) { 1500 /* no slots were appropriate, advance */ 1501 continue; 1502 } 1503 goto again; 1504 } 1505 setbit(sc->sc_keymap, keyix); 1506 setbit(sc->sc_keymap, keyix+64); 1507 setbit(sc->sc_keymap, keyix+32); 1508 setbit(sc->sc_keymap, keyix+32+64); 1509 DPRINTF(sc, ATH_DEBUG_KEYCACHE, 1510 "%s: key pair %u,%u %u,%u\n", 1511 __func__, keyix, keyix+64, 1512 keyix+32, keyix+32+64); 1513 *txkeyix = keyix; 1514 *rxkeyix = keyix+32; 1515 return 1; 1516 } 1517 } 1518 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: out of pair space\n", __func__); 1519 return 0; 1520 #undef N 1521 } 1522 1523 /* 1524 * Allocate a single key cache slot. 1525 */ 1526 static int 1527 key_alloc_single(struct ath_softc *sc, 1528 ieee80211_keyix *txkeyix, ieee80211_keyix *rxkeyix) 1529 { 1530 #define N(a) (sizeof(a)/sizeof(a[0])) 1531 u_int i, keyix; 1532 1533 /* XXX try i,i+32,i+64,i+32+64 to minimize key pair conflicts */ 1534 for (i = 0; i < N(sc->sc_keymap); i++) { 1535 u_int8_t b = sc->sc_keymap[i]; 1536 if (b != 0xff) { 1537 /* 1538 * One or more slots are free. 1539 */ 1540 keyix = i*NBBY; 1541 while (b & 1) 1542 keyix++, b >>= 1; 1543 setbit(sc->sc_keymap, keyix); 1544 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: key %u\n", 1545 __func__, keyix); 1546 *txkeyix = *rxkeyix = keyix; 1547 return 1; 1548 } 1549 } 1550 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: out of space\n", __func__); 1551 return 0; 1552 #undef N 1553 } 1554 1555 /* 1556 * Allocate one or more key cache slots for a uniacst key. The 1557 * key itself is needed only to identify the cipher. For hardware 1558 * TKIP with split cipher+MIC keys we allocate two key cache slot 1559 * pairs so that we can setup separate TX and RX MIC keys. Note 1560 * that the MIC key for a TKIP key at slot i is assumed by the 1561 * hardware to be at slot i+64. This limits TKIP keys to the first 1562 * 64 entries. 1563 */ 1564 static int 1565 ath_key_alloc(struct ieee80211com *ic, const struct ieee80211_key *k, 1566 ieee80211_keyix *keyix, ieee80211_keyix *rxkeyix) 1567 { 1568 struct ath_softc *sc = ic->ic_ifp->if_softc; 1569 1570 /* 1571 * Group key allocation must be handled specially for 1572 * parts that do not support multicast key cache search 1573 * functionality. For those parts the key id must match 1574 * the h/w key index so lookups find the right key. On 1575 * parts w/ the key search facility we install the sender's 1576 * mac address (with the high bit set) and let the hardware 1577 * find the key w/o using the key id. This is preferred as 1578 * it permits us to support multiple users for adhoc and/or 1579 * multi-station operation. 1580 */ 1581 if ((k->wk_flags & IEEE80211_KEY_GROUP) && !sc->sc_mcastkey) { 1582 if (!(&ic->ic_nw_keys[0] <= k && 1583 k < &ic->ic_nw_keys[IEEE80211_WEP_NKID])) { 1584 /* should not happen */ 1585 DPRINTF(sc, ATH_DEBUG_KEYCACHE, 1586 "%s: bogus group key\n", __func__); 1587 return 0; 1588 } 1589 /* 1590 * XXX we pre-allocate the global keys so 1591 * have no way to check if they've already been allocated. 1592 */ 1593 *keyix = *rxkeyix = k - ic->ic_nw_keys; 1594 return 1; 1595 } 1596 1597 /* 1598 * We allocate two pair for TKIP when using the h/w to do 1599 * the MIC. For everything else, including software crypto, 1600 * we allocate a single entry. Note that s/w crypto requires 1601 * a pass-through slot on the 5211 and 5212. The 5210 does 1602 * not support pass-through cache entries and we map all 1603 * those requests to slot 0. 1604 */ 1605 if (k->wk_flags & IEEE80211_KEY_SWCRYPT) { 1606 return key_alloc_single(sc, keyix, rxkeyix); 1607 } else if (k->wk_cipher->ic_cipher == IEEE80211_CIPHER_TKIP && 1608 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && sc->sc_splitmic) { 1609 return key_alloc_2pair(sc, keyix, rxkeyix); 1610 } else { 1611 return key_alloc_single(sc, keyix, rxkeyix); 1612 } 1613 } 1614 1615 /* 1616 * Delete an entry in the key cache allocated by ath_key_alloc. 1617 */ 1618 static int 1619 ath_key_delete(struct ieee80211com *ic, const struct ieee80211_key *k) 1620 { 1621 struct ath_softc *sc = ic->ic_ifp->if_softc; 1622 struct ath_hal *ah = sc->sc_ah; 1623 const struct ieee80211_cipher *cip = k->wk_cipher; 1624 u_int keyix = k->wk_keyix; 1625 1626 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: delete key %u\n", __func__, keyix); 1627 1628 ath_hal_keyreset(ah, keyix); 1629 /* 1630 * Handle split tx/rx keying required for TKIP with h/w MIC. 1631 */ 1632 if (cip->ic_cipher == IEEE80211_CIPHER_TKIP && 1633 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && sc->sc_splitmic) 1634 ath_hal_keyreset(ah, keyix+32); /* RX key */ 1635 if (keyix >= IEEE80211_WEP_NKID) { 1636 /* 1637 * Don't touch keymap entries for global keys so 1638 * they are never considered for dynamic allocation. 1639 */ 1640 clrbit(sc->sc_keymap, keyix); 1641 if (cip->ic_cipher == IEEE80211_CIPHER_TKIP && 1642 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && 1643 sc->sc_splitmic) { 1644 clrbit(sc->sc_keymap, keyix+64); /* TX key MIC */ 1645 clrbit(sc->sc_keymap, keyix+32); /* RX key */ 1646 clrbit(sc->sc_keymap, keyix+32+64); /* RX key MIC */ 1647 } 1648 } 1649 return 1; 1650 } 1651 1652 /* 1653 * Set the key cache contents for the specified key. Key cache 1654 * slot(s) must already have been allocated by ath_key_alloc. 1655 */ 1656 static int 1657 ath_key_set(struct ieee80211com *ic, const struct ieee80211_key *k, 1658 const u_int8_t mac[IEEE80211_ADDR_LEN]) 1659 { 1660 struct ath_softc *sc = ic->ic_ifp->if_softc; 1661 1662 return ath_keyset(sc, k, mac, ic->ic_bss); 1663 } 1664 1665 /* 1666 * Block/unblock tx+rx processing while a key change is done. 1667 * We assume the caller serializes key management operations 1668 * so we only need to worry about synchronization with other 1669 * uses that originate in the driver. 1670 */ 1671 static void 1672 ath_key_update_begin(struct ieee80211com *ic) 1673 { 1674 struct ifnet *ifp = ic->ic_ifp; 1675 struct ath_softc *sc = ifp->if_softc; 1676 1677 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 1678 #if 0 1679 tasklet_disable(&sc->sc_rxtq); 1680 #endif 1681 IF_LOCK(&ifp->if_snd); /* NB: doesn't block mgmt frames */ 1682 } 1683 1684 static void 1685 ath_key_update_end(struct ieee80211com *ic) 1686 { 1687 struct ifnet *ifp = ic->ic_ifp; 1688 struct ath_softc *sc = ifp->if_softc; 1689 1690 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 1691 IF_UNLOCK(&ifp->if_snd); 1692 #if 0 1693 tasklet_enable(&sc->sc_rxtq); 1694 #endif 1695 } 1696 1697 /* 1698 * Calculate the receive filter according to the 1699 * operating mode and state: 1700 * 1701 * o always accept unicast, broadcast, and multicast traffic 1702 * o maintain current state of phy error reception (the hal 1703 * may enable phy error frames for noise immunity work) 1704 * o probe request frames are accepted only when operating in 1705 * hostap, adhoc, or monitor modes 1706 * o enable promiscuous mode according to the interface state 1707 * o accept beacons: 1708 * - when operating in adhoc mode so the 802.11 layer creates 1709 * node table entries for peers, 1710 * - when operating in station mode for collecting rssi data when 1711 * the station is otherwise quiet, or 1712 * - when scanning 1713 */ 1714 static u_int32_t 1715 ath_calcrxfilter(struct ath_softc *sc, enum ieee80211_state state) 1716 { 1717 struct ieee80211com *ic = &sc->sc_ic; 1718 struct ath_hal *ah = sc->sc_ah; 1719 struct ifnet *ifp = &sc->sc_if; 1720 u_int32_t rfilt; 1721 1722 rfilt = (ath_hal_getrxfilter(ah) & HAL_RX_FILTER_PHYERR) 1723 | HAL_RX_FILTER_UCAST | HAL_RX_FILTER_BCAST | HAL_RX_FILTER_MCAST; 1724 if (ic->ic_opmode != IEEE80211_M_STA) 1725 rfilt |= HAL_RX_FILTER_PROBEREQ; 1726 if (ic->ic_opmode != IEEE80211_M_HOSTAP && 1727 (ifp->if_flags & IFF_PROMISC)) 1728 rfilt |= HAL_RX_FILTER_PROM; 1729 if (ic->ic_opmode == IEEE80211_M_STA || 1730 ic->ic_opmode == IEEE80211_M_IBSS || 1731 state == IEEE80211_S_SCAN) 1732 rfilt |= HAL_RX_FILTER_BEACON; 1733 return rfilt; 1734 } 1735 1736 static void 1737 ath_mcastfilter_accum(caddr_t dl, u_int32_t *mfilt) 1738 { 1739 u_int32_t val; 1740 u_int8_t pos; 1741 1742 /* calculate XOR of eight 6bit values */ 1743 val = LE_READ_4(dl + 0); 1744 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 1745 val = LE_READ_4(dl + 3); 1746 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 1747 pos &= 0x3f; 1748 mfilt[pos / 32] |= (1 << (pos % 32)); 1749 } 1750 1751 static void 1752 ath_mcastfilter_compute(struct ath_softc *sc, u_int32_t *mfilt) 1753 { 1754 struct ifnet *ifp = &sc->sc_if; 1755 struct ether_multi *enm; 1756 struct ether_multistep estep; 1757 1758 mfilt[0] = mfilt[1] = 0; 1759 ETHER_FIRST_MULTI(estep, &sc->sc_ec, enm); 1760 while (enm != NULL) { 1761 /* XXX Punt on ranges. */ 1762 if (!IEEE80211_ADDR_EQ(enm->enm_addrlo, enm->enm_addrhi)) { 1763 mfilt[0] = mfilt[1] = ~((u_int32_t)0); 1764 ifp->if_flags |= IFF_ALLMULTI; 1765 return; 1766 } 1767 ath_mcastfilter_accum(enm->enm_addrlo, mfilt); 1768 ETHER_NEXT_MULTI(estep, enm); 1769 } 1770 ifp->if_flags &= ~IFF_ALLMULTI; 1771 } 1772 1773 static void 1774 ath_mode_init(struct ath_softc *sc) 1775 { 1776 struct ieee80211com *ic = &sc->sc_ic; 1777 struct ath_hal *ah = sc->sc_ah; 1778 u_int32_t rfilt, mfilt[2]; 1779 int i; 1780 1781 /* configure rx filter */ 1782 rfilt = ath_calcrxfilter(sc, ic->ic_state); 1783 ath_hal_setrxfilter(ah, rfilt); 1784 1785 /* configure operational mode */ 1786 ath_hal_setopmode(ah); 1787 1788 /* Write keys to hardware; it may have been powered down. */ 1789 ath_key_update_begin(ic); 1790 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 1791 ath_key_set(ic, 1792 &ic->ic_crypto.cs_nw_keys[i], 1793 ic->ic_myaddr); 1794 } 1795 ath_key_update_end(ic); 1796 1797 /* 1798 * Handle any link-level address change. Note that we only 1799 * need to force ic_myaddr; any other addresses are handled 1800 * as a byproduct of the ifnet code marking the interface 1801 * down then up. 1802 * 1803 * XXX should get from lladdr instead of arpcom but that's more work 1804 */ 1805 IEEE80211_ADDR_COPY(ic->ic_myaddr, LLADDR(sc->sc_if.if_sadl)); 1806 ath_hal_setmac(ah, ic->ic_myaddr); 1807 1808 /* calculate and install multicast filter */ 1809 #ifdef __FreeBSD__ 1810 if ((ifp->if_flags & IFF_ALLMULTI) == 0) { 1811 mfilt[0] = mfilt[1] = 0; 1812 IF_ADDR_LOCK(ifp); 1813 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1814 caddr_t dl; 1815 1816 /* calculate XOR of eight 6bit values */ 1817 dl = LLADDR((struct sockaddr_dl *) ifma->ifma_addr); 1818 val = LE_READ_4(dl + 0); 1819 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 1820 val = LE_READ_4(dl + 3); 1821 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 1822 pos &= 0x3f; 1823 mfilt[pos / 32] |= (1 << (pos % 32)); 1824 } 1825 IF_ADDR_UNLOCK(ifp); 1826 } else { 1827 mfilt[0] = mfilt[1] = ~0; 1828 #endif 1829 #ifdef __NetBSD__ 1830 ath_mcastfilter_compute(sc, mfilt); 1831 #endif 1832 ath_hal_setmcastfilter(ah, mfilt[0], mfilt[1]); 1833 DPRINTF(sc, ATH_DEBUG_MODE, "%s: RX filter 0x%x, MC filter %08x:%08x\n", 1834 __func__, rfilt, mfilt[0], mfilt[1]); 1835 } 1836 1837 /* 1838 * Set the slot time based on the current setting. 1839 */ 1840 static void 1841 ath_setslottime(struct ath_softc *sc) 1842 { 1843 struct ieee80211com *ic = &sc->sc_ic; 1844 struct ath_hal *ah = sc->sc_ah; 1845 1846 if (ic->ic_flags & IEEE80211_F_SHSLOT) 1847 ath_hal_setslottime(ah, HAL_SLOT_TIME_9); 1848 else 1849 ath_hal_setslottime(ah, HAL_SLOT_TIME_20); 1850 sc->sc_updateslot = OK; 1851 } 1852 1853 /* 1854 * Callback from the 802.11 layer to update the 1855 * slot time based on the current setting. 1856 */ 1857 static void 1858 ath_updateslot(struct ifnet *ifp) 1859 { 1860 struct ath_softc *sc = ifp->if_softc; 1861 struct ieee80211com *ic = &sc->sc_ic; 1862 1863 /* 1864 * When not coordinating the BSS, change the hardware 1865 * immediately. For other operation we defer the change 1866 * until beacon updates have propagated to the stations. 1867 */ 1868 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 1869 sc->sc_updateslot = UPDATE; 1870 else 1871 ath_setslottime(sc); 1872 } 1873 1874 /* 1875 * Setup a h/w transmit queue for beacons. 1876 */ 1877 static int 1878 ath_beaconq_setup(struct ath_hal *ah) 1879 { 1880 HAL_TXQ_INFO qi; 1881 1882 memset(&qi, 0, sizeof(qi)); 1883 qi.tqi_aifs = HAL_TXQ_USEDEFAULT; 1884 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; 1885 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; 1886 /* NB: for dynamic turbo, don't enable any other interrupts */ 1887 qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE; 1888 return ath_hal_setuptxqueue(ah, HAL_TX_QUEUE_BEACON, &qi); 1889 } 1890 1891 /* 1892 * Setup the transmit queue parameters for the beacon queue. 1893 */ 1894 static int 1895 ath_beaconq_config(struct ath_softc *sc) 1896 { 1897 #define ATH_EXPONENT_TO_VALUE(v) ((1<<(v))-1) 1898 struct ieee80211com *ic = &sc->sc_ic; 1899 struct ath_hal *ah = sc->sc_ah; 1900 HAL_TXQ_INFO qi; 1901 1902 ath_hal_gettxqueueprops(ah, sc->sc_bhalq, &qi); 1903 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 1904 /* 1905 * Always burst out beacon and CAB traffic. 1906 */ 1907 qi.tqi_aifs = ATH_BEACON_AIFS_DEFAULT; 1908 qi.tqi_cwmin = ATH_BEACON_CWMIN_DEFAULT; 1909 qi.tqi_cwmax = ATH_BEACON_CWMAX_DEFAULT; 1910 } else { 1911 struct wmeParams *wmep = 1912 &ic->ic_wme.wme_chanParams.cap_wmeParams[WME_AC_BE]; 1913 /* 1914 * Adhoc mode; important thing is to use 2x cwmin. 1915 */ 1916 qi.tqi_aifs = wmep->wmep_aifsn; 1917 qi.tqi_cwmin = 2*ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); 1918 qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); 1919 } 1920 1921 if (!ath_hal_settxqueueprops(ah, sc->sc_bhalq, &qi)) { 1922 device_printf(sc->sc_dev, "unable to update parameters for " 1923 "beacon hardware queue!\n"); 1924 return 0; 1925 } else { 1926 ath_hal_resettxqueue(ah, sc->sc_bhalq); /* push to h/w */ 1927 return 1; 1928 } 1929 #undef ATH_EXPONENT_TO_VALUE 1930 } 1931 1932 /* 1933 * Allocate and setup an initial beacon frame. 1934 */ 1935 static int 1936 ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_node *ni) 1937 { 1938 struct ieee80211com *ic = ni->ni_ic; 1939 struct ath_buf *bf; 1940 struct mbuf *m; 1941 int error; 1942 1943 bf = STAILQ_FIRST(&sc->sc_bbuf); 1944 if (bf == NULL) { 1945 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: no dma buffers\n", __func__); 1946 sc->sc_stats.ast_be_nombuf++; /* XXX */ 1947 return ENOMEM; /* XXX */ 1948 } 1949 /* 1950 * NB: the beacon data buffer must be 32-bit aligned; 1951 * we assume the mbuf routines will return us something 1952 * with this alignment (perhaps should assert). 1953 */ 1954 m = ieee80211_beacon_alloc(ic, ni, &sc->sc_boff); 1955 if (m == NULL) { 1956 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: cannot get mbuf\n", 1957 __func__); 1958 sc->sc_stats.ast_be_nombuf++; 1959 return ENOMEM; 1960 } 1961 error = bus_dmamap_load_mbuf(sc->sc_dmat, bf->bf_dmamap, m, 1962 BUS_DMA_NOWAIT); 1963 if (error == 0) { 1964 bf->bf_m = m; 1965 bf->bf_node = ieee80211_ref_node(ni); 1966 } else { 1967 m_freem(m); 1968 } 1969 return error; 1970 } 1971 1972 /* 1973 * Setup the beacon frame for transmit. 1974 */ 1975 static void 1976 ath_beacon_setup(struct ath_softc *sc, struct ath_buf *bf) 1977 { 1978 #define USE_SHPREAMBLE(_ic) \ 1979 (((_ic)->ic_flags & (IEEE80211_F_SHPREAMBLE | IEEE80211_F_USEBARKER))\ 1980 == IEEE80211_F_SHPREAMBLE) 1981 struct ieee80211_node *ni = bf->bf_node; 1982 struct ieee80211com *ic = ni->ni_ic; 1983 struct mbuf *m = bf->bf_m; 1984 struct ath_hal *ah = sc->sc_ah; 1985 struct ath_node *an = ATH_NODE(ni); 1986 struct ath_desc *ds; 1987 int flags, antenna; 1988 u_int8_t rate; 1989 1990 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: m %p len %u\n", 1991 __func__, m, m->m_len); 1992 1993 /* setup descriptors */ 1994 ds = bf->bf_desc; 1995 1996 flags = HAL_TXDESC_NOACK; 1997 if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) { 1998 ds->ds_link = bf->bf_daddr; /* self-linked */ 1999 flags |= HAL_TXDESC_VEOL; 2000 /* 2001 * Let hardware handle antenna switching unless 2002 * the user has selected a transmit antenna 2003 * (sc_txantenna is not 0). 2004 */ 2005 antenna = sc->sc_txantenna; 2006 } else { 2007 ds->ds_link = 0; 2008 /* 2009 * Switch antenna every 4 beacons, unless the user 2010 * has selected a transmit antenna (sc_txantenna 2011 * is not 0). 2012 * 2013 * XXX assumes two antenna 2014 */ 2015 if (sc->sc_txantenna == 0) 2016 antenna = (sc->sc_stats.ast_be_xmit & 4 ? 2 : 1); 2017 else 2018 antenna = sc->sc_txantenna; 2019 } 2020 2021 KASSERT(bf->bf_nseg == 1, 2022 ("multi-segment beacon frame; nseg %u", bf->bf_nseg)); 2023 ds->ds_data = bf->bf_segs[0].ds_addr; 2024 /* 2025 * Calculate rate code. 2026 * XXX everything at min xmit rate 2027 */ 2028 if (USE_SHPREAMBLE(ic)) 2029 rate = an->an_tx_mgtratesp; 2030 else 2031 rate = an->an_tx_mgtrate; 2032 ath_hal_setuptxdesc(ah, ds 2033 , m->m_len + IEEE80211_CRC_LEN /* frame length */ 2034 , sizeof(struct ieee80211_frame)/* header length */ 2035 , HAL_PKT_TYPE_BEACON /* Atheros packet type */ 2036 , ni->ni_txpower /* txpower XXX */ 2037 , rate, 1 /* series 0 rate/tries */ 2038 , HAL_TXKEYIX_INVALID /* no encryption */ 2039 , antenna /* antenna mode */ 2040 , flags /* no ack, veol for beacons */ 2041 , 0 /* rts/cts rate */ 2042 , 0 /* rts/cts duration */ 2043 ); 2044 /* NB: beacon's BufLen must be a multiple of 4 bytes */ 2045 ath_hal_filltxdesc(ah, ds 2046 , roundup(m->m_len, 4) /* buffer length */ 2047 , AH_TRUE /* first segment */ 2048 , AH_TRUE /* last segment */ 2049 , ds /* first descriptor */ 2050 ); 2051 #undef USE_SHPREAMBLE 2052 } 2053 2054 /* 2055 * Transmit a beacon frame at SWBA. Dynamic updates to the 2056 * frame contents are done as needed and the slot time is 2057 * also adjusted based on current state. 2058 */ 2059 static void 2060 ath_beacon_proc(void *arg, int pending) 2061 { 2062 struct ath_softc *sc = arg; 2063 struct ath_buf *bf = STAILQ_FIRST(&sc->sc_bbuf); 2064 struct ieee80211_node *ni = bf->bf_node; 2065 struct ieee80211com *ic = ni->ni_ic; 2066 struct ath_hal *ah = sc->sc_ah; 2067 struct mbuf *m; 2068 int ncabq, error, otherant; 2069 2070 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: pending %u\n", 2071 __func__, pending); 2072 2073 if (ic->ic_opmode == IEEE80211_M_STA || 2074 ic->ic_opmode == IEEE80211_M_MONITOR || 2075 bf == NULL || bf->bf_m == NULL) { 2076 DPRINTF(sc, ATH_DEBUG_ANY, "%s: ic_flags=%x bf=%p bf_m=%p\n", 2077 __func__, ic->ic_flags, bf, bf ? bf->bf_m : NULL); 2078 return; 2079 } 2080 /* 2081 * Check if the previous beacon has gone out. If 2082 * not don't don't try to post another, skip this 2083 * period and wait for the next. Missed beacons 2084 * indicate a problem and should not occur. If we 2085 * miss too many consecutive beacons reset the device. 2086 */ 2087 if (ath_hal_numtxpending(ah, sc->sc_bhalq) != 0) { 2088 sc->sc_bmisscount++; 2089 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, 2090 "%s: missed %u consecutive beacons\n", 2091 __func__, sc->sc_bmisscount); 2092 if (sc->sc_bmisscount > 3) /* NB: 3 is a guess */ 2093 TASK_RUN_OR_ENQUEUE(&sc->sc_bstucktask); 2094 return; 2095 } 2096 if (sc->sc_bmisscount != 0) { 2097 DPRINTF(sc, ATH_DEBUG_BEACON, 2098 "%s: resume beacon xmit after %u misses\n", 2099 __func__, sc->sc_bmisscount); 2100 sc->sc_bmisscount = 0; 2101 } 2102 2103 /* 2104 * Update dynamic beacon contents. If this returns 2105 * non-zero then we need to remap the memory because 2106 * the beacon frame changed size (probably because 2107 * of the TIM bitmap). 2108 */ 2109 m = bf->bf_m; 2110 ncabq = ath_hal_numtxpending(ah, sc->sc_cabq->axq_qnum); 2111 if (ieee80211_beacon_update(ic, bf->bf_node, &sc->sc_boff, m, ncabq)) { 2112 /* XXX too conservative? */ 2113 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 2114 error = bus_dmamap_load_mbuf(sc->sc_dmat, bf->bf_dmamap, m, 2115 BUS_DMA_NOWAIT); 2116 if (error != 0) { 2117 if_printf(&sc->sc_if, 2118 "%s: bus_dmamap_load_mbuf failed, error %u\n", 2119 __func__, error); 2120 return; 2121 } 2122 } 2123 2124 /* 2125 * Handle slot time change when a non-ERP station joins/leaves 2126 * an 11g network. The 802.11 layer notifies us via callback, 2127 * we mark updateslot, then wait one beacon before effecting 2128 * the change. This gives associated stations at least one 2129 * beacon interval to note the state change. 2130 */ 2131 /* XXX locking */ 2132 if (sc->sc_updateslot == UPDATE) 2133 sc->sc_updateslot = COMMIT; /* commit next beacon */ 2134 else if (sc->sc_updateslot == COMMIT) 2135 ath_setslottime(sc); /* commit change to h/w */ 2136 2137 /* 2138 * Check recent per-antenna transmit statistics and flip 2139 * the default antenna if noticeably more frames went out 2140 * on the non-default antenna. 2141 * XXX assumes 2 anntenae 2142 */ 2143 otherant = sc->sc_defant & 1 ? 2 : 1; 2144 if (sc->sc_ant_tx[otherant] > sc->sc_ant_tx[sc->sc_defant] + 2) 2145 ath_setdefantenna(sc, otherant); 2146 sc->sc_ant_tx[1] = sc->sc_ant_tx[2] = 0; 2147 2148 /* 2149 * Construct tx descriptor. 2150 */ 2151 ath_beacon_setup(sc, bf); 2152 2153 /* 2154 * Stop any current dma and put the new frame on the queue. 2155 * This should never fail since we check above that no frames 2156 * are still pending on the queue. 2157 */ 2158 if (!ath_hal_stoptxdma(ah, sc->sc_bhalq)) { 2159 DPRINTF(sc, ATH_DEBUG_ANY, 2160 "%s: beacon queue %u did not stop?\n", 2161 __func__, sc->sc_bhalq); 2162 } 2163 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 0, 2164 bf->bf_dmamap->dm_mapsize, BUS_DMASYNC_PREWRITE); 2165 2166 /* 2167 * Enable the CAB queue before the beacon queue to 2168 * insure cab frames are triggered by this beacon. 2169 */ 2170 if (sc->sc_boff.bo_tim[4] & 1) /* NB: only at DTIM */ 2171 ath_hal_txstart(ah, sc->sc_cabq->axq_qnum); 2172 ath_hal_puttxbuf(ah, sc->sc_bhalq, bf->bf_daddr); 2173 ath_hal_txstart(ah, sc->sc_bhalq); 2174 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, 2175 "%s: TXDP[%u] = %p (%p)\n", __func__, 2176 sc->sc_bhalq, (caddr_t)bf->bf_daddr, bf->bf_desc); 2177 2178 sc->sc_stats.ast_be_xmit++; 2179 } 2180 2181 /* 2182 * Reset the hardware after detecting beacons have stopped. 2183 */ 2184 static void 2185 ath_bstuck_proc(void *arg, int pending) 2186 { 2187 struct ath_softc *sc = arg; 2188 struct ifnet *ifp = &sc->sc_if; 2189 2190 if_printf(ifp, "stuck beacon; resetting (bmiss count %u)\n", 2191 sc->sc_bmisscount); 2192 ath_reset(ifp); 2193 } 2194 2195 /* 2196 * Reclaim beacon resources. 2197 */ 2198 static void 2199 ath_beacon_free(struct ath_softc *sc) 2200 { 2201 struct ath_buf *bf; 2202 2203 STAILQ_FOREACH(bf, &sc->sc_bbuf, bf_list) { 2204 if (bf->bf_m != NULL) { 2205 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 2206 m_freem(bf->bf_m); 2207 bf->bf_m = NULL; 2208 } 2209 if (bf->bf_node != NULL) { 2210 ieee80211_free_node(bf->bf_node); 2211 bf->bf_node = NULL; 2212 } 2213 } 2214 } 2215 2216 /* 2217 * Configure the beacon and sleep timers. 2218 * 2219 * When operating as an AP this resets the TSF and sets 2220 * up the hardware to notify us when we need to issue beacons. 2221 * 2222 * When operating in station mode this sets up the beacon 2223 * timers according to the timestamp of the last received 2224 * beacon and the current TSF, configures PCF and DTIM 2225 * handling, programs the sleep registers so the hardware 2226 * will wakeup in time to receive beacons, and configures 2227 * the beacon miss handling so we'll receive a BMISS 2228 * interrupt when we stop seeing beacons from the AP 2229 * we've associated with. 2230 */ 2231 static void 2232 ath_beacon_config(struct ath_softc *sc) 2233 { 2234 #define TSF_TO_TU(_h,_l) (((_h) << 22) | ((_l) >> 10)) 2235 struct ath_hal *ah = sc->sc_ah; 2236 struct ieee80211com *ic = &sc->sc_ic; 2237 struct ieee80211_node *ni = ic->ic_bss; 2238 u_int32_t nexttbtt, intval; 2239 2240 /* extract tstamp from last beacon and convert to TU */ 2241 nexttbtt = TSF_TO_TU(LE_READ_4(ni->ni_tstamp.data + 4), 2242 LE_READ_4(ni->ni_tstamp.data)); 2243 /* NB: the beacon interval is kept internally in TU's */ 2244 intval = ni->ni_intval & HAL_BEACON_PERIOD; 2245 if (nexttbtt == 0) /* e.g. for ap mode */ 2246 nexttbtt = intval; 2247 else if (intval) /* NB: can be 0 for monitor mode */ 2248 nexttbtt = roundup(nexttbtt, intval); 2249 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: nexttbtt %u intval %u (%u)\n", 2250 __func__, nexttbtt, intval, ni->ni_intval); 2251 if (ic->ic_opmode == IEEE80211_M_STA) { 2252 HAL_BEACON_STATE bs; 2253 u_int64_t tsf; 2254 u_int32_t tsftu; 2255 int dtimperiod, dtimcount; 2256 int cfpperiod, cfpcount; 2257 2258 /* 2259 * Setup dtim and cfp parameters according to 2260 * last beacon we received (which may be none). 2261 */ 2262 dtimperiod = ni->ni_dtim_period; 2263 if (dtimperiod <= 0) /* NB: 0 if not known */ 2264 dtimperiod = 1; 2265 dtimcount = ni->ni_dtim_count; 2266 if (dtimcount >= dtimperiod) /* NB: sanity check */ 2267 dtimcount = 0; /* XXX? */ 2268 cfpperiod = 1; /* NB: no PCF support yet */ 2269 cfpcount = 0; 2270 #define FUDGE 2 2271 /* 2272 * Pull nexttbtt forward to reflect the current 2273 * TSF and calculate dtim+cfp state for the result. 2274 */ 2275 tsf = ath_hal_gettsf64(ah); 2276 tsftu = TSF_TO_TU((u_int32_t)(tsf>>32), (u_int32_t)tsf) + FUDGE; 2277 do { 2278 nexttbtt += intval; 2279 if (--dtimcount < 0) { 2280 dtimcount = dtimperiod - 1; 2281 if (--cfpcount < 0) 2282 cfpcount = cfpperiod - 1; 2283 } 2284 } while (nexttbtt < tsftu); 2285 #undef FUDGE 2286 memset(&bs, 0, sizeof(bs)); 2287 bs.bs_intval = intval; 2288 bs.bs_nexttbtt = nexttbtt; 2289 bs.bs_dtimperiod = dtimperiod*intval; 2290 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval; 2291 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod; 2292 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod; 2293 bs.bs_cfpmaxduration = 0; 2294 #if 0 2295 /* 2296 * The 802.11 layer records the offset to the DTIM 2297 * bitmap while receiving beacons; use it here to 2298 * enable h/w detection of our AID being marked in 2299 * the bitmap vector (to indicate frames for us are 2300 * pending at the AP). 2301 * XXX do DTIM handling in s/w to WAR old h/w bugs 2302 * XXX enable based on h/w rev for newer chips 2303 */ 2304 bs.bs_timoffset = ni->ni_timoff; 2305 #endif 2306 /* 2307 * Calculate the number of consecutive beacons to miss 2308 * before taking a BMISS interrupt. The configuration 2309 * is specified in ms, so we need to convert that to 2310 * TU's and then calculate based on the beacon interval. 2311 * Note that we clamp the result to at most 10 beacons. 2312 */ 2313 bs.bs_bmissthreshold = howmany(ic->ic_bmisstimeout, intval); 2314 if (bs.bs_bmissthreshold > 10) 2315 bs.bs_bmissthreshold = 10; 2316 else if (bs.bs_bmissthreshold <= 0) 2317 bs.bs_bmissthreshold = 1; 2318 2319 /* 2320 * Calculate sleep duration. The configuration is 2321 * given in ms. We insure a multiple of the beacon 2322 * period is used. Also, if the sleep duration is 2323 * greater than the DTIM period then it makes senses 2324 * to make it a multiple of that. 2325 * 2326 * XXX fixed at 100ms 2327 */ 2328 bs.bs_sleepduration = 2329 roundup(IEEE80211_MS_TO_TU(100), bs.bs_intval); 2330 if (bs.bs_sleepduration > bs.bs_dtimperiod) 2331 bs.bs_sleepduration = roundup(bs.bs_sleepduration, bs.bs_dtimperiod); 2332 2333 DPRINTF(sc, ATH_DEBUG_BEACON, 2334 "%s: tsf %ju tsf:tu %u intval %u nexttbtt %u dtim %u nextdtim %u bmiss %u sleep %u cfp:period %u maxdur %u next %u timoffset %u\n" 2335 , __func__ 2336 , tsf, tsftu 2337 , bs.bs_intval 2338 , bs.bs_nexttbtt 2339 , bs.bs_dtimperiod 2340 , bs.bs_nextdtim 2341 , bs.bs_bmissthreshold 2342 , bs.bs_sleepduration 2343 , bs.bs_cfpperiod 2344 , bs.bs_cfpmaxduration 2345 , bs.bs_cfpnext 2346 , bs.bs_timoffset 2347 ); 2348 ath_hal_intrset(ah, 0); 2349 ath_hal_beacontimers(ah, &bs); 2350 sc->sc_imask |= HAL_INT_BMISS; 2351 ath_hal_intrset(ah, sc->sc_imask); 2352 } else { 2353 ath_hal_intrset(ah, 0); 2354 if (nexttbtt == intval) 2355 intval |= HAL_BEACON_RESET_TSF; 2356 if (ic->ic_opmode == IEEE80211_M_IBSS) { 2357 /* 2358 * In IBSS mode enable the beacon timers but only 2359 * enable SWBA interrupts if we need to manually 2360 * prepare beacon frames. Otherwise we use a 2361 * self-linked tx descriptor and let the hardware 2362 * deal with things. 2363 */ 2364 intval |= HAL_BEACON_ENA; 2365 if (!sc->sc_hasveol) 2366 sc->sc_imask |= HAL_INT_SWBA; 2367 ath_beaconq_config(sc); 2368 } else if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 2369 /* 2370 * In AP mode we enable the beacon timers and 2371 * SWBA interrupts to prepare beacon frames. 2372 */ 2373 intval |= HAL_BEACON_ENA; 2374 sc->sc_imask |= HAL_INT_SWBA; /* beacon prepare */ 2375 ath_beaconq_config(sc); 2376 } 2377 ath_hal_beaconinit(ah, nexttbtt, intval); 2378 sc->sc_bmisscount = 0; 2379 ath_hal_intrset(ah, sc->sc_imask); 2380 /* 2381 * When using a self-linked beacon descriptor in 2382 * ibss mode load it once here. 2383 */ 2384 if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) 2385 ath_beacon_proc(sc, 0); 2386 } 2387 #undef TSF_TO_TU 2388 } 2389 2390 static int 2391 ath_descdma_setup(struct ath_softc *sc, 2392 struct ath_descdma *dd, ath_bufhead *head, 2393 const char *name, int nbuf, int ndesc) 2394 { 2395 #define DS2PHYS(_dd, _ds) \ 2396 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc)) 2397 struct ifnet *ifp = &sc->sc_if; 2398 struct ath_desc *ds; 2399 struct ath_buf *bf; 2400 int i, bsize, error; 2401 2402 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA: %u buffers %u desc/buf\n", 2403 __func__, name, nbuf, ndesc); 2404 2405 dd->dd_name = name; 2406 dd->dd_desc_len = sizeof(struct ath_desc) * nbuf * ndesc; 2407 2408 /* 2409 * Setup DMA descriptor area. 2410 */ 2411 dd->dd_dmat = sc->sc_dmat; 2412 2413 error = bus_dmamem_alloc(dd->dd_dmat, dd->dd_desc_len, PAGE_SIZE, 2414 0, &dd->dd_dseg, 1, &dd->dd_dnseg, 0); 2415 2416 if (error != 0) { 2417 if_printf(ifp, "unable to alloc memory for %u %s descriptors, " 2418 "error %u\n", nbuf * ndesc, dd->dd_name, error); 2419 goto fail0; 2420 } 2421 2422 error = bus_dmamem_map(dd->dd_dmat, &dd->dd_dseg, dd->dd_dnseg, 2423 dd->dd_desc_len, (caddr_t *)&dd->dd_desc, BUS_DMA_COHERENT); 2424 if (error != 0) { 2425 if_printf(ifp, "unable to map %u %s descriptors, error = %u\n", 2426 nbuf * ndesc, dd->dd_name, error); 2427 goto fail1; 2428 } 2429 2430 /* allocate descriptors */ 2431 error = bus_dmamap_create(dd->dd_dmat, dd->dd_desc_len, 1, 2432 dd->dd_desc_len, 0, BUS_DMA_NOWAIT, &dd->dd_dmamap); 2433 if (error != 0) { 2434 if_printf(ifp, "unable to create dmamap for %s descriptors, " 2435 "error %u\n", dd->dd_name, error); 2436 goto fail2; 2437 } 2438 2439 error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap, dd->dd_desc, 2440 dd->dd_desc_len, NULL, BUS_DMA_NOWAIT); 2441 if (error != 0) { 2442 if_printf(ifp, "unable to map %s descriptors, error %u\n", 2443 dd->dd_name, error); 2444 goto fail3; 2445 } 2446 2447 ds = dd->dd_desc; 2448 dd->dd_desc_paddr = dd->dd_dmamap->dm_segs[0].ds_addr; 2449 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA map: %p (%lu) -> %p (%lu)\n", 2450 __func__, dd->dd_name, ds, (u_long) dd->dd_desc_len, 2451 (caddr_t) dd->dd_desc_paddr, /*XXX*/ (u_long) dd->dd_desc_len); 2452 2453 /* allocate rx buffers */ 2454 bsize = sizeof(struct ath_buf) * nbuf; 2455 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO); 2456 if (bf == NULL) { 2457 if_printf(ifp, "malloc of %s buffers failed, size %u\n", 2458 dd->dd_name, bsize); 2459 goto fail4; 2460 } 2461 dd->dd_bufptr = bf; 2462 2463 STAILQ_INIT(head); 2464 for (i = 0; i < nbuf; i++, bf++, ds += ndesc) { 2465 bf->bf_desc = ds; 2466 bf->bf_daddr = DS2PHYS(dd, ds); 2467 error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, ndesc, 2468 MCLBYTES, 0, BUS_DMA_NOWAIT, &bf->bf_dmamap); 2469 if (error != 0) { 2470 if_printf(ifp, "unable to create dmamap for %s " 2471 "buffer %u, error %u\n", dd->dd_name, i, error); 2472 ath_descdma_cleanup(sc, dd, head); 2473 return error; 2474 } 2475 STAILQ_INSERT_TAIL(head, bf, bf_list); 2476 } 2477 return 0; 2478 fail4: 2479 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 2480 fail3: 2481 bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap); 2482 fail2: 2483 bus_dmamem_unmap(dd->dd_dmat, (caddr_t)dd->dd_desc, dd->dd_desc_len); 2484 fail1: 2485 bus_dmamem_free(dd->dd_dmat, &dd->dd_dseg, dd->dd_dnseg); 2486 fail0: 2487 memset(dd, 0, sizeof(*dd)); 2488 return error; 2489 #undef DS2PHYS 2490 } 2491 2492 static void 2493 ath_descdma_cleanup(struct ath_softc *sc, 2494 struct ath_descdma *dd, ath_bufhead *head) 2495 { 2496 struct ath_buf *bf; 2497 struct ieee80211_node *ni; 2498 2499 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 2500 bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap); 2501 bus_dmamem_unmap(dd->dd_dmat, (caddr_t)dd->dd_desc, dd->dd_desc_len); 2502 bus_dmamem_free(dd->dd_dmat, &dd->dd_dseg, dd->dd_dnseg); 2503 2504 STAILQ_FOREACH(bf, head, bf_list) { 2505 if (bf->bf_m) { 2506 m_freem(bf->bf_m); 2507 bf->bf_m = NULL; 2508 } 2509 if (bf->bf_dmamap != NULL) { 2510 bus_dmamap_destroy(sc->sc_dmat, bf->bf_dmamap); 2511 bf->bf_dmamap = NULL; 2512 } 2513 ni = bf->bf_node; 2514 bf->bf_node = NULL; 2515 if (ni != NULL) { 2516 /* 2517 * Reclaim node reference. 2518 */ 2519 ieee80211_free_node(ni); 2520 } 2521 } 2522 2523 STAILQ_INIT(head); 2524 free(dd->dd_bufptr, M_ATHDEV); 2525 memset(dd, 0, sizeof(*dd)); 2526 } 2527 2528 static int 2529 ath_desc_alloc(struct ath_softc *sc) 2530 { 2531 int error; 2532 2533 error = ath_descdma_setup(sc, &sc->sc_rxdma, &sc->sc_rxbuf, 2534 "rx", ATH_RXBUF, 1); 2535 if (error != 0) 2536 return error; 2537 2538 error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf, 2539 "tx", ATH_TXBUF, ATH_TXDESC); 2540 if (error != 0) { 2541 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 2542 return error; 2543 } 2544 2545 error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf, 2546 "beacon", 1, 1); 2547 if (error != 0) { 2548 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 2549 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 2550 return error; 2551 } 2552 return 0; 2553 } 2554 2555 static void 2556 ath_desc_free(struct ath_softc *sc) 2557 { 2558 2559 if (sc->sc_bdma.dd_desc_len != 0) 2560 ath_descdma_cleanup(sc, &sc->sc_bdma, &sc->sc_bbuf); 2561 if (sc->sc_txdma.dd_desc_len != 0) 2562 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 2563 if (sc->sc_rxdma.dd_desc_len != 0) 2564 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 2565 } 2566 2567 static struct ieee80211_node * 2568 ath_node_alloc(struct ieee80211_node_table *nt) 2569 { 2570 struct ieee80211com *ic = nt->nt_ic; 2571 struct ath_softc *sc = ic->ic_ifp->if_softc; 2572 const size_t space = sizeof(struct ath_node) + sc->sc_rc->arc_space; 2573 struct ath_node *an; 2574 2575 an = malloc(space, M_80211_NODE, M_NOWAIT|M_ZERO); 2576 if (an == NULL) { 2577 /* XXX stat+msg */ 2578 return NULL; 2579 } 2580 an->an_avgrssi = ATH_RSSI_DUMMY_MARKER; 2581 an->an_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER; 2582 an->an_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER; 2583 an->an_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER; 2584 ath_rate_node_init(sc, an); 2585 2586 DPRINTF(sc, ATH_DEBUG_NODE, "%s: an %p\n", __func__, an); 2587 return &an->an_node; 2588 } 2589 2590 static void 2591 ath_node_free(struct ieee80211_node *ni) 2592 { 2593 struct ieee80211com *ic = ni->ni_ic; 2594 struct ath_softc *sc = ic->ic_ifp->if_softc; 2595 2596 DPRINTF(sc, ATH_DEBUG_NODE, "%s: ni %p\n", __func__, ni); 2597 2598 ath_rate_node_cleanup(sc, ATH_NODE(ni)); 2599 sc->sc_node_free(ni); 2600 } 2601 2602 static u_int8_t 2603 ath_node_getrssi(const struct ieee80211_node *ni) 2604 { 2605 #define HAL_EP_RND(x, mul) \ 2606 ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul)) 2607 u_int32_t avgrssi = ATH_NODE_CONST(ni)->an_avgrssi; 2608 int32_t rssi; 2609 2610 /* 2611 * When only one frame is received there will be no state in 2612 * avgrssi so fallback on the value recorded by the 802.11 layer. 2613 */ 2614 if (avgrssi != ATH_RSSI_DUMMY_MARKER) 2615 rssi = HAL_EP_RND(avgrssi, HAL_RSSI_EP_MULTIPLIER); 2616 else 2617 rssi = ni->ni_rssi; 2618 /* NB: theoretically we shouldn't need this, but be paranoid */ 2619 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 2620 #undef HAL_EP_RND 2621 } 2622 2623 static int 2624 ath_rxbuf_init(struct ath_softc *sc, struct ath_buf *bf) 2625 { 2626 struct ath_hal *ah = sc->sc_ah; 2627 int error; 2628 struct mbuf *m; 2629 struct ath_desc *ds; 2630 2631 m = bf->bf_m; 2632 if (m == NULL) { 2633 /* 2634 * NB: by assigning a page to the rx dma buffer we 2635 * implicitly satisfy the Atheros requirement that 2636 * this buffer be cache-line-aligned and sized to be 2637 * multiple of the cache line size. Not doing this 2638 * causes weird stuff to happen (for the 5210 at least). 2639 */ 2640 m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 2641 if (m == NULL) { 2642 DPRINTF(sc, ATH_DEBUG_ANY, 2643 "%s: no mbuf/cluster\n", __func__); 2644 sc->sc_stats.ast_rx_nombuf++; 2645 return ENOMEM; 2646 } 2647 bf->bf_m = m; 2648 m->m_pkthdr.len = m->m_len = m->m_ext.ext_size; 2649 2650 error = bus_dmamap_load_mbuf(sc->sc_dmat, 2651 bf->bf_dmamap, m, 2652 BUS_DMA_NOWAIT); 2653 if (error != 0) { 2654 DPRINTF(sc, ATH_DEBUG_ANY, 2655 "%s: bus_dmamap_load_mbuf failed; error %d\n", 2656 __func__, error); 2657 sc->sc_stats.ast_rx_busdma++; 2658 return error; 2659 } 2660 KASSERT(bf->bf_nseg == 1, 2661 ("multi-segment packet; nseg %u", bf->bf_nseg)); 2662 } 2663 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 0, 2664 bf->bf_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 2665 2666 /* 2667 * Setup descriptors. For receive we always terminate 2668 * the descriptor list with a self-linked entry so we'll 2669 * not get overrun under high load (as can happen with a 2670 * 5212 when ANI processing enables PHY error frames). 2671 * 2672 * To insure the last descriptor is self-linked we create 2673 * each descriptor as self-linked and add it to the end. As 2674 * each additional descriptor is added the previous self-linked 2675 * entry is ``fixed'' naturally. This should be safe even 2676 * if DMA is happening. When processing RX interrupts we 2677 * never remove/process the last, self-linked, entry on the 2678 * descriptor list. This insures the hardware always has 2679 * someplace to write a new frame. 2680 */ 2681 ds = bf->bf_desc; 2682 ds->ds_link = bf->bf_daddr; /* link to self */ 2683 ds->ds_data = bf->bf_segs[0].ds_addr; 2684 ath_hal_setuprxdesc(ah, ds 2685 , m->m_len /* buffer size */ 2686 , 0 2687 ); 2688 2689 if (sc->sc_rxlink != NULL) 2690 *sc->sc_rxlink = bf->bf_daddr; 2691 sc->sc_rxlink = &ds->ds_link; 2692 return 0; 2693 } 2694 2695 /* 2696 * Extend 15-bit time stamp from rx descriptor to 2697 * a full 64-bit TSF using the current h/w TSF. 2698 */ 2699 static __inline u_int64_t 2700 ath_extend_tsf(struct ath_hal *ah, u_int32_t rstamp) 2701 { 2702 u_int64_t tsf; 2703 2704 tsf = ath_hal_gettsf64(ah); 2705 if ((tsf & 0x7fff) < rstamp) 2706 tsf -= 0x8000; 2707 return ((tsf &~ 0x7fff) | rstamp); 2708 } 2709 2710 /* 2711 * Intercept management frames to collect beacon rssi data 2712 * and to do ibss merges. 2713 */ 2714 static void 2715 ath_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 2716 struct ieee80211_node *ni, 2717 int subtype, int rssi, u_int32_t rstamp) 2718 { 2719 struct ath_softc *sc = ic->ic_ifp->if_softc; 2720 2721 /* 2722 * Call up first so subsequent work can use information 2723 * potentially stored in the node (e.g. for ibss merge). 2724 */ 2725 sc->sc_recv_mgmt(ic, m, ni, subtype, rssi, rstamp); 2726 switch (subtype) { 2727 case IEEE80211_FC0_SUBTYPE_BEACON: 2728 /* update rssi statistics for use by the hal */ 2729 ATH_RSSI_LPF(ATH_NODE(ni)->an_halstats.ns_avgbrssi, rssi); 2730 /* fall thru... */ 2731 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 2732 if (ic->ic_opmode == IEEE80211_M_IBSS && 2733 ic->ic_state == IEEE80211_S_RUN) { 2734 u_int64_t tsf = ath_extend_tsf(sc->sc_ah, rstamp); 2735 2736 /* 2737 * Handle ibss merge as needed; check the tsf on the 2738 * frame before attempting the merge. The 802.11 spec 2739 * says the station should change it's bssid to match 2740 * the oldest station with the same ssid, where oldest 2741 * is determined by the tsf. Note that hardware 2742 * reconfiguration happens through callback to 2743 * ath_newstate as the state machine will go from 2744 * RUN -> RUN when this happens. 2745 */ 2746 if (le64toh(ni->ni_tstamp.tsf) >= tsf) { 2747 DPRINTF(sc, ATH_DEBUG_STATE, 2748 "ibss merge, rstamp %u tsf %ju " 2749 "tstamp %ju\n", rstamp, (uintmax_t)tsf, 2750 (uintmax_t)ni->ni_tstamp.tsf); 2751 (void) ieee80211_ibss_merge(ni); 2752 } 2753 } 2754 break; 2755 } 2756 } 2757 2758 /* 2759 * Set the default antenna. 2760 */ 2761 static void 2762 ath_setdefantenna(struct ath_softc *sc, u_int antenna) 2763 { 2764 struct ath_hal *ah = sc->sc_ah; 2765 2766 /* XXX block beacon interrupts */ 2767 ath_hal_setdefantenna(ah, antenna); 2768 if (sc->sc_defant != antenna) 2769 sc->sc_stats.ast_ant_defswitch++; 2770 sc->sc_defant = antenna; 2771 sc->sc_rxotherant = 0; 2772 } 2773 2774 static void 2775 ath_rx_proc(void *arg, int npending) 2776 { 2777 #define PA2DESC(_sc, _pa) \ 2778 ((struct ath_desc *)((caddr_t)(_sc)->sc_rxdma.dd_desc + \ 2779 ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr))) 2780 struct ath_softc *sc = arg; 2781 struct ath_buf *bf; 2782 struct ieee80211com *ic = &sc->sc_ic; 2783 struct ifnet *ifp = &sc->sc_if; 2784 struct ath_hal *ah = sc->sc_ah; 2785 struct ath_desc *ds; 2786 struct mbuf *m; 2787 struct ieee80211_node *ni; 2788 struct ath_node *an; 2789 int len, type; 2790 u_int phyerr; 2791 HAL_STATUS status; 2792 2793 NET_LOCK_GIANT(); /* XXX */ 2794 2795 DPRINTF(sc, ATH_DEBUG_RX_PROC, "%s: pending %u\n", __func__, npending); 2796 do { 2797 bf = STAILQ_FIRST(&sc->sc_rxbuf); 2798 if (bf == NULL) { /* NB: shouldn't happen */ 2799 if_printf(ifp, "%s: no buffer!\n", __func__); 2800 break; 2801 } 2802 ds = bf->bf_desc; 2803 if (ds->ds_link == bf->bf_daddr) { 2804 /* NB: never process the self-linked entry at the end */ 2805 break; 2806 } 2807 m = bf->bf_m; 2808 if (m == NULL) { /* NB: shouldn't happen */ 2809 if_printf(ifp, "%s: no mbuf!\n", __func__); 2810 continue; 2811 } 2812 /* XXX sync descriptor memory */ 2813 /* 2814 * Must provide the virtual address of the current 2815 * descriptor, the physical address, and the virtual 2816 * address of the next descriptor in the h/w chain. 2817 * This allows the HAL to look ahead to see if the 2818 * hardware is done with a descriptor by checking the 2819 * done bit in the following descriptor and the address 2820 * of the current descriptor the DMA engine is working 2821 * on. All this is necessary because of our use of 2822 * a self-linked list to avoid rx overruns. 2823 */ 2824 status = ath_hal_rxprocdesc(ah, ds, 2825 bf->bf_daddr, PA2DESC(sc, ds->ds_link)); 2826 #ifdef AR_DEBUG 2827 if (sc->sc_debug & ATH_DEBUG_RECV_DESC) 2828 ath_printrxbuf(bf, status == HAL_OK); 2829 #endif 2830 if (status == HAL_EINPROGRESS) 2831 break; 2832 STAILQ_REMOVE_HEAD(&sc->sc_rxbuf, bf_list); 2833 if (ds->ds_rxstat.rs_more) { 2834 /* 2835 * Frame spans multiple descriptors; this 2836 * cannot happen yet as we don't support 2837 * jumbograms. If not in monitor mode, 2838 * discard the frame. 2839 */ 2840 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2841 sc->sc_stats.ast_rx_toobig++; 2842 goto rx_next; 2843 } 2844 /* fall thru for monitor mode handling... */ 2845 } else if (ds->ds_rxstat.rs_status != 0) { 2846 if (ds->ds_rxstat.rs_status & HAL_RXERR_CRC) 2847 sc->sc_stats.ast_rx_crcerr++; 2848 if (ds->ds_rxstat.rs_status & HAL_RXERR_FIFO) 2849 sc->sc_stats.ast_rx_fifoerr++; 2850 if (ds->ds_rxstat.rs_status & HAL_RXERR_PHY) { 2851 sc->sc_stats.ast_rx_phyerr++; 2852 phyerr = ds->ds_rxstat.rs_phyerr & 0x1f; 2853 sc->sc_stats.ast_rx_phy[phyerr]++; 2854 goto rx_next; 2855 } 2856 if (ds->ds_rxstat.rs_status & HAL_RXERR_DECRYPT) { 2857 /* 2858 * Decrypt error. If the error occurred 2859 * because there was no hardware key, then 2860 * let the frame through so the upper layers 2861 * can process it. This is necessary for 5210 2862 * parts which have no way to setup a ``clear'' 2863 * key cache entry. 2864 * 2865 * XXX do key cache faulting 2866 */ 2867 if (ds->ds_rxstat.rs_keyix == HAL_RXKEYIX_INVALID) 2868 goto rx_accept; 2869 sc->sc_stats.ast_rx_badcrypt++; 2870 } 2871 if (ds->ds_rxstat.rs_status & HAL_RXERR_MIC) { 2872 sc->sc_stats.ast_rx_badmic++; 2873 /* 2874 * Do minimal work required to hand off 2875 * the 802.11 header for notifcation. 2876 */ 2877 /* XXX frag's and qos frames */ 2878 len = ds->ds_rxstat.rs_datalen; 2879 if (len >= sizeof (struct ieee80211_frame)) { 2880 bus_dmamap_sync(sc->sc_dmat, 2881 bf->bf_dmamap, 2882 0, bf->bf_dmamap->dm_mapsize, 2883 BUS_DMASYNC_POSTREAD); 2884 ieee80211_notify_michael_failure(ic, 2885 mtod(m, struct ieee80211_frame *), 2886 sc->sc_splitmic ? 2887 ds->ds_rxstat.rs_keyix-32 : 2888 ds->ds_rxstat.rs_keyix 2889 ); 2890 } 2891 } 2892 ifp->if_ierrors++; 2893 /* 2894 * Reject error frames, we normally don't want 2895 * to see them in monitor mode (in monitor mode 2896 * allow through packets that have crypto problems). 2897 */ 2898 if ((ds->ds_rxstat.rs_status &~ 2899 (HAL_RXERR_DECRYPT|HAL_RXERR_MIC)) || 2900 sc->sc_ic.ic_opmode != IEEE80211_M_MONITOR) 2901 goto rx_next; 2902 } 2903 rx_accept: 2904 /* 2905 * Sync and unmap the frame. At this point we're 2906 * committed to passing the mbuf somewhere so clear 2907 * bf_m; this means a new sk_buff must be allocated 2908 * when the rx descriptor is setup again to receive 2909 * another frame. 2910 */ 2911 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 2912 0, bf->bf_dmamap->dm_mapsize, 2913 BUS_DMASYNC_POSTREAD); 2914 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 2915 bf->bf_m = NULL; 2916 2917 m->m_pkthdr.rcvif = ifp; 2918 len = ds->ds_rxstat.rs_datalen; 2919 m->m_pkthdr.len = m->m_len = len; 2920 2921 sc->sc_stats.ast_ant_rx[ds->ds_rxstat.rs_antenna]++; 2922 2923 #if NBPFILTER > 0 2924 if (sc->sc_drvbpf) { 2925 u_int8_t rix; 2926 2927 /* 2928 * Discard anything shorter than an ack or cts. 2929 */ 2930 if (len < IEEE80211_ACK_LEN) { 2931 DPRINTF(sc, ATH_DEBUG_RECV, 2932 "%s: runt packet %d\n", 2933 __func__, len); 2934 sc->sc_stats.ast_rx_tooshort++; 2935 m_freem(m); 2936 goto rx_next; 2937 } 2938 rix = ds->ds_rxstat.rs_rate; 2939 sc->sc_rx_th.wr_flags = sc->sc_hwmap[rix].rxflags; 2940 sc->sc_rx_th.wr_rate = sc->sc_hwmap[rix].ieeerate; 2941 sc->sc_rx_th.wr_antsignal = ds->ds_rxstat.rs_rssi; 2942 sc->sc_rx_th.wr_antenna = ds->ds_rxstat.rs_antenna; 2943 /* XXX TSF */ 2944 2945 bpf_mtap2(sc->sc_drvbpf, 2946 &sc->sc_rx_th, sc->sc_rx_th_len, m); 2947 } 2948 #endif 2949 2950 /* 2951 * From this point on we assume the frame is at least 2952 * as large as ieee80211_frame_min; verify that. 2953 */ 2954 if (len < IEEE80211_MIN_LEN) { 2955 DPRINTF(sc, ATH_DEBUG_RECV, "%s: short packet %d\n", 2956 __func__, len); 2957 sc->sc_stats.ast_rx_tooshort++; 2958 m_freem(m); 2959 goto rx_next; 2960 } 2961 2962 if (IFF_DUMPPKTS(sc, ATH_DEBUG_RECV)) { 2963 ieee80211_dump_pkt(mtod(m, caddr_t), len, 2964 sc->sc_hwmap[ds->ds_rxstat.rs_rate].ieeerate, 2965 ds->ds_rxstat.rs_rssi); 2966 } 2967 2968 m_adj(m, -IEEE80211_CRC_LEN); 2969 2970 /* 2971 * Locate the node for sender, track state, and then 2972 * pass the (referenced) node up to the 802.11 layer 2973 * for its use. 2974 */ 2975 ni = ieee80211_find_rxnode_withkey(ic, 2976 mtod(m, const struct ieee80211_frame_min *), 2977 ds->ds_rxstat.rs_keyix == HAL_RXKEYIX_INVALID ? 2978 IEEE80211_KEYIX_NONE : ds->ds_rxstat.rs_keyix); 2979 /* 2980 * Track rx rssi and do any rx antenna management. 2981 */ 2982 an = ATH_NODE(ni); 2983 ATH_RSSI_LPF(an->an_avgrssi, ds->ds_rxstat.rs_rssi); 2984 /* 2985 * Send frame up for processing. 2986 */ 2987 type = ieee80211_input(ic, m, ni, 2988 ds->ds_rxstat.rs_rssi, ds->ds_rxstat.rs_tstamp); 2989 ieee80211_free_node(ni); 2990 if (sc->sc_diversity) { 2991 /* 2992 * When using fast diversity, change the default rx 2993 * antenna if diversity chooses the other antenna 3 2994 * times in a row. 2995 */ 2996 if (sc->sc_defant != ds->ds_rxstat.rs_antenna) { 2997 if (++sc->sc_rxotherant >= 3) 2998 ath_setdefantenna(sc, 2999 ds->ds_rxstat.rs_antenna); 3000 } else 3001 sc->sc_rxotherant = 0; 3002 } 3003 if (sc->sc_softled) { 3004 /* 3005 * Blink for any data frame. Otherwise do a 3006 * heartbeat-style blink when idle. The latter 3007 * is mainly for station mode where we depend on 3008 * periodic beacon frames to trigger the poll event. 3009 */ 3010 if (type == IEEE80211_FC0_TYPE_DATA) { 3011 sc->sc_rxrate = ds->ds_rxstat.rs_rate; 3012 ath_led_event(sc, ATH_LED_RX); 3013 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle) 3014 ath_led_event(sc, ATH_LED_POLL); 3015 } 3016 rx_next: 3017 STAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list); 3018 } while (ath_rxbuf_init(sc, bf) == 0); 3019 3020 /* rx signal state monitoring */ 3021 ath_hal_rxmonitor(ah, &ATH_NODE(ic->ic_bss)->an_halstats); 3022 3023 #ifdef __NetBSD__ 3024 /* XXX Why isn't this necessary in FreeBSD? */ 3025 if ((ifp->if_flags & IFF_OACTIVE) == 0 && !IFQ_IS_EMPTY(&ifp->if_snd)) 3026 ath_start(ifp); 3027 #endif /* __NetBSD__ */ 3028 3029 NET_UNLOCK_GIANT(); /* XXX */ 3030 #undef PA2DESC 3031 } 3032 3033 /* 3034 * Setup a h/w transmit queue. 3035 */ 3036 static struct ath_txq * 3037 ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) 3038 { 3039 #define N(a) (sizeof(a)/sizeof(a[0])) 3040 struct ath_hal *ah = sc->sc_ah; 3041 HAL_TXQ_INFO qi; 3042 int qnum; 3043 3044 memset(&qi, 0, sizeof(qi)); 3045 qi.tqi_subtype = subtype; 3046 qi.tqi_aifs = HAL_TXQ_USEDEFAULT; 3047 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; 3048 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; 3049 /* 3050 * Enable interrupts only for EOL and DESC conditions. 3051 * We mark tx descriptors to receive a DESC interrupt 3052 * when a tx queue gets deep; otherwise waiting for the 3053 * EOL to reap descriptors. Note that this is done to 3054 * reduce interrupt load and this only defers reaping 3055 * descriptors, never transmitting frames. Aside from 3056 * reducing interrupts this also permits more concurrency. 3057 * The only potential downside is if the tx queue backs 3058 * up in which case the top half of the kernel may backup 3059 * due to a lack of tx descriptors. 3060 */ 3061 qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | TXQ_FLAG_TXDESCINT_ENABLE; 3062 qnum = ath_hal_setuptxqueue(ah, qtype, &qi); 3063 if (qnum == -1) { 3064 /* 3065 * NB: don't print a message, this happens 3066 * normally on parts with too few tx queues 3067 */ 3068 return NULL; 3069 } 3070 if (qnum >= N(sc->sc_txq)) { 3071 device_printf(sc->sc_dev, 3072 "hal qnum %u out of range, max %zu!\n", 3073 qnum, N(sc->sc_txq)); 3074 ath_hal_releasetxqueue(ah, qnum); 3075 return NULL; 3076 } 3077 if (!ATH_TXQ_SETUP(sc, qnum)) { 3078 struct ath_txq *txq = &sc->sc_txq[qnum]; 3079 3080 txq->axq_qnum = qnum; 3081 txq->axq_depth = 0; 3082 txq->axq_intrcnt = 0; 3083 txq->axq_link = NULL; 3084 STAILQ_INIT(&txq->axq_q); 3085 ATH_TXQ_LOCK_INIT(sc, txq); 3086 sc->sc_txqsetup |= 1<<qnum; 3087 } 3088 return &sc->sc_txq[qnum]; 3089 #undef N 3090 } 3091 3092 /* 3093 * Setup a hardware data transmit queue for the specified 3094 * access control. The hal may not support all requested 3095 * queues in which case it will return a reference to a 3096 * previously setup queue. We record the mapping from ac's 3097 * to h/w queues for use by ath_tx_start and also track 3098 * the set of h/w queues being used to optimize work in the 3099 * transmit interrupt handler and related routines. 3100 */ 3101 static int 3102 ath_tx_setup(struct ath_softc *sc, int ac, int haltype) 3103 { 3104 #define N(a) (sizeof(a)/sizeof(a[0])) 3105 struct ath_txq *txq; 3106 3107 if (ac >= N(sc->sc_ac2q)) { 3108 device_printf(sc->sc_dev, "AC %u out of range, max %zu!\n", 3109 ac, N(sc->sc_ac2q)); 3110 return 0; 3111 } 3112 txq = ath_txq_setup(sc, HAL_TX_QUEUE_DATA, haltype); 3113 if (txq != NULL) { 3114 sc->sc_ac2q[ac] = txq; 3115 return 1; 3116 } else 3117 return 0; 3118 #undef N 3119 } 3120 3121 /* 3122 * Update WME parameters for a transmit queue. 3123 */ 3124 static int 3125 ath_txq_update(struct ath_softc *sc, int ac) 3126 { 3127 #define ATH_EXPONENT_TO_VALUE(v) ((1<<v)-1) 3128 #define ATH_TXOP_TO_US(v) (v<<5) 3129 struct ieee80211com *ic = &sc->sc_ic; 3130 struct ath_txq *txq = sc->sc_ac2q[ac]; 3131 struct wmeParams *wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 3132 struct ath_hal *ah = sc->sc_ah; 3133 HAL_TXQ_INFO qi; 3134 3135 ath_hal_gettxqueueprops(ah, txq->axq_qnum, &qi); 3136 qi.tqi_aifs = wmep->wmep_aifsn; 3137 qi.tqi_cwmin = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); 3138 qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); 3139 qi.tqi_burstTime = ATH_TXOP_TO_US(wmep->wmep_txopLimit); 3140 3141 if (!ath_hal_settxqueueprops(ah, txq->axq_qnum, &qi)) { 3142 device_printf(sc->sc_dev, "unable to update hardware queue " 3143 "parameters for %s traffic!\n", 3144 ieee80211_wme_acnames[ac]); 3145 return 0; 3146 } else { 3147 ath_hal_resettxqueue(ah, txq->axq_qnum); /* push to h/w */ 3148 return 1; 3149 } 3150 #undef ATH_TXOP_TO_US 3151 #undef ATH_EXPONENT_TO_VALUE 3152 } 3153 3154 /* 3155 * Callback from the 802.11 layer to update WME parameters. 3156 */ 3157 static int 3158 ath_wme_update(struct ieee80211com *ic) 3159 { 3160 struct ath_softc *sc = ic->ic_ifp->if_softc; 3161 3162 return !ath_txq_update(sc, WME_AC_BE) || 3163 !ath_txq_update(sc, WME_AC_BK) || 3164 !ath_txq_update(sc, WME_AC_VI) || 3165 !ath_txq_update(sc, WME_AC_VO) ? EIO : 0; 3166 } 3167 3168 /* 3169 * Reclaim resources for a setup queue. 3170 */ 3171 static void 3172 ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) 3173 { 3174 3175 ath_hal_releasetxqueue(sc->sc_ah, txq->axq_qnum); 3176 ATH_TXQ_LOCK_DESTROY(txq); 3177 sc->sc_txqsetup &= ~(1<<txq->axq_qnum); 3178 } 3179 3180 /* 3181 * Reclaim all tx queue resources. 3182 */ 3183 static void 3184 ath_tx_cleanup(struct ath_softc *sc) 3185 { 3186 int i; 3187 3188 ATH_TXBUF_LOCK_DESTROY(sc); 3189 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 3190 if (ATH_TXQ_SETUP(sc, i)) 3191 ath_tx_cleanupq(sc, &sc->sc_txq[i]); 3192 } 3193 3194 /* 3195 * Defragment an mbuf chain, returning at most maxfrags separate 3196 * mbufs+clusters. If this is not possible NULL is returned and 3197 * the original mbuf chain is left in it's present (potentially 3198 * modified) state. We use two techniques: collapsing consecutive 3199 * mbufs and replacing consecutive mbufs by a cluster. 3200 */ 3201 static struct mbuf * 3202 ath_defrag(struct mbuf *m0, int how, int maxfrags) 3203 { 3204 struct mbuf *m, *n, *n2, **prev; 3205 u_int curfrags; 3206 3207 /* 3208 * Calculate the current number of frags. 3209 */ 3210 curfrags = 0; 3211 for (m = m0; m != NULL; m = m->m_next) 3212 curfrags++; 3213 /* 3214 * First, try to collapse mbufs. Note that we always collapse 3215 * towards the front so we don't need to deal with moving the 3216 * pkthdr. This may be suboptimal if the first mbuf has much 3217 * less data than the following. 3218 */ 3219 m = m0; 3220 again: 3221 for (;;) { 3222 n = m->m_next; 3223 if (n == NULL) 3224 break; 3225 if ((m->m_flags & M_RDONLY) == 0 && 3226 n->m_len < M_TRAILINGSPACE(m)) { 3227 bcopy(mtod(n, void *), mtod(m, char *) + m->m_len, 3228 n->m_len); 3229 m->m_len += n->m_len; 3230 m->m_next = n->m_next; 3231 m_free(n); 3232 if (--curfrags <= maxfrags) 3233 return m0; 3234 } else 3235 m = n; 3236 } 3237 KASSERT(maxfrags > 1, 3238 ("maxfrags %u, but normal collapse failed", maxfrags)); 3239 /* 3240 * Collapse consecutive mbufs to a cluster. 3241 */ 3242 prev = &m0->m_next; /* NB: not the first mbuf */ 3243 while ((n = *prev) != NULL) { 3244 if ((n2 = n->m_next) != NULL && 3245 n->m_len + n2->m_len < MCLBYTES) { 3246 m = m_getcl(how, MT_DATA, 0); 3247 if (m == NULL) 3248 goto bad; 3249 bcopy(mtod(n, void *), mtod(m, void *), n->m_len); 3250 bcopy(mtod(n2, void *), mtod(m, char *) + n->m_len, 3251 n2->m_len); 3252 m->m_len = n->m_len + n2->m_len; 3253 m->m_next = n2->m_next; 3254 *prev = m; 3255 m_free(n); 3256 m_free(n2); 3257 if (--curfrags <= maxfrags) /* +1 cl -2 mbufs */ 3258 return m0; 3259 /* 3260 * Still not there, try the normal collapse 3261 * again before we allocate another cluster. 3262 */ 3263 goto again; 3264 } 3265 prev = &n->m_next; 3266 } 3267 /* 3268 * No place where we can collapse to a cluster; punt. 3269 * This can occur if, for example, you request 2 frags 3270 * but the packet requires that both be clusters (we 3271 * never reallocate the first mbuf to avoid moving the 3272 * packet header). 3273 */ 3274 bad: 3275 return NULL; 3276 } 3277 3278 static int 3279 ath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_buf *bf, 3280 struct mbuf *m0) 3281 { 3282 #define CTS_DURATION \ 3283 ath_hal_computetxtime(ah, rt, IEEE80211_ACK_LEN, cix, AH_TRUE) 3284 #define updateCTSForBursting(_ah, _ds, _txq) \ 3285 ath_hal_updateCTSForBursting(_ah, _ds, \ 3286 _txq->axq_linkbuf != NULL ? _txq->axq_linkbuf->bf_desc : NULL, \ 3287 _txq->axq_lastdsWithCTS, _txq->axq_gatingds, \ 3288 txopLimit, CTS_DURATION) 3289 struct ieee80211com *ic = &sc->sc_ic; 3290 struct ath_hal *ah = sc->sc_ah; 3291 struct ifnet *ifp = &sc->sc_if; 3292 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 3293 int i, error, iswep, ismcast, keyix, hdrlen, pktlen, try0; 3294 u_int8_t rix, txrate, ctsrate; 3295 u_int8_t cix = 0xff; /* NB: silence compiler */ 3296 struct ath_desc *ds, *ds0; 3297 struct ath_txq *txq; 3298 struct ieee80211_frame *wh; 3299 u_int subtype, flags, ctsduration; 3300 HAL_PKT_TYPE atype; 3301 const HAL_RATE_TABLE *rt; 3302 HAL_BOOL shortPreamble; 3303 struct ath_node *an; 3304 struct mbuf *m; 3305 u_int pri; 3306 3307 wh = mtod(m0, struct ieee80211_frame *); 3308 iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 3309 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 3310 hdrlen = ieee80211_anyhdrsize(wh); 3311 /* 3312 * Packet length must not include any 3313 * pad bytes; deduct them here. 3314 */ 3315 pktlen = m0->m_pkthdr.len - (hdrlen & 3); 3316 3317 if (iswep) { 3318 const struct ieee80211_cipher *cip; 3319 struct ieee80211_key *k; 3320 3321 /* 3322 * Construct the 802.11 header+trailer for an encrypted 3323 * frame. The only reason this can fail is because of an 3324 * unknown or unsupported cipher/key type. 3325 */ 3326 k = ieee80211_crypto_encap(ic, ni, m0); 3327 if (k == NULL) { 3328 /* 3329 * This can happen when the key is yanked after the 3330 * frame was queued. Just discard the frame; the 3331 * 802.11 layer counts failures and provides 3332 * debugging/diagnostics. 3333 */ 3334 m_freem(m0); 3335 return EIO; 3336 } 3337 /* 3338 * Adjust the packet + header lengths for the crypto 3339 * additions and calculate the h/w key index. When 3340 * a s/w mic is done the frame will have had any mic 3341 * added to it prior to entry so skb->len above will 3342 * account for it. Otherwise we need to add it to the 3343 * packet length. 3344 */ 3345 cip = k->wk_cipher; 3346 hdrlen += cip->ic_header; 3347 pktlen += cip->ic_header + cip->ic_trailer; 3348 if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0) 3349 pktlen += cip->ic_miclen; 3350 keyix = k->wk_keyix; 3351 3352 /* packet header may have moved, reset our local pointer */ 3353 wh = mtod(m0, struct ieee80211_frame *); 3354 } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 3355 /* 3356 * Use station key cache slot, if assigned. 3357 */ 3358 keyix = ni->ni_ucastkey.wk_keyix; 3359 if (keyix == IEEE80211_KEYIX_NONE) 3360 keyix = HAL_TXKEYIX_INVALID; 3361 } else 3362 keyix = HAL_TXKEYIX_INVALID; 3363 3364 pktlen += IEEE80211_CRC_LEN; 3365 3366 /* 3367 * Load the DMA map so any coalescing is done. This 3368 * also calculates the number of descriptors we need. 3369 */ 3370 error = bus_dmamap_load_mbuf(sc->sc_dmat, bf->bf_dmamap, m0, 3371 BUS_DMA_NOWAIT); 3372 if (error == EFBIG) { 3373 /* XXX packet requires too many descriptors */ 3374 bf->bf_nseg = ATH_TXDESC+1; 3375 } else if (error != 0) { 3376 sc->sc_stats.ast_tx_busdma++; 3377 m_freem(m0); 3378 return error; 3379 } 3380 /* 3381 * Discard null packets and check for packets that 3382 * require too many TX descriptors. We try to convert 3383 * the latter to a cluster. 3384 */ 3385 if (error == EFBIG) { /* too many desc's, linearize */ 3386 sc->sc_stats.ast_tx_linear++; 3387 m = ath_defrag(m0, M_DONTWAIT, ATH_TXDESC); 3388 if (m == NULL) { 3389 m_freem(m0); 3390 sc->sc_stats.ast_tx_nombuf++; 3391 return ENOMEM; 3392 } 3393 m0 = m; 3394 error = bus_dmamap_load_mbuf(sc->sc_dmat, bf->bf_dmamap, m0, 3395 BUS_DMA_NOWAIT); 3396 if (error != 0) { 3397 sc->sc_stats.ast_tx_busdma++; 3398 m_freem(m0); 3399 return error; 3400 } 3401 KASSERT(bf->bf_nseg <= ATH_TXDESC, 3402 ("too many segments after defrag; nseg %u", bf->bf_nseg)); 3403 } else if (bf->bf_nseg == 0) { /* null packet, discard */ 3404 sc->sc_stats.ast_tx_nodata++; 3405 m_freem(m0); 3406 return EIO; 3407 } 3408 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", __func__, m0, pktlen); 3409 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 0, 3410 bf->bf_dmamap->dm_mapsize, BUS_DMASYNC_PREWRITE); 3411 bf->bf_m = m0; 3412 bf->bf_node = ni; /* NB: held reference */ 3413 3414 /* setup descriptors */ 3415 ds = bf->bf_desc; 3416 rt = sc->sc_currates; 3417 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 3418 3419 /* 3420 * NB: the 802.11 layer marks whether or not we should 3421 * use short preamble based on the current mode and 3422 * negotiated parameters. 3423 */ 3424 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 3425 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) && !ismcast) { 3426 shortPreamble = AH_TRUE; 3427 sc->sc_stats.ast_tx_shortpre++; 3428 } else { 3429 shortPreamble = AH_FALSE; 3430 } 3431 3432 an = ATH_NODE(ni); 3433 flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 3434 /* 3435 * Calculate Atheros packet type from IEEE80211 packet header, 3436 * setup for rate calculations, and select h/w transmit queue. 3437 */ 3438 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 3439 case IEEE80211_FC0_TYPE_MGT: 3440 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 3441 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 3442 atype = HAL_PKT_TYPE_BEACON; 3443 else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 3444 atype = HAL_PKT_TYPE_PROBE_RESP; 3445 else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 3446 atype = HAL_PKT_TYPE_ATIM; 3447 else 3448 atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 3449 rix = 0; /* XXX lowest rate */ 3450 try0 = ATH_TXMAXTRY; 3451 if (shortPreamble) 3452 txrate = an->an_tx_mgtratesp; 3453 else 3454 txrate = an->an_tx_mgtrate; 3455 /* NB: force all management frames to highest queue */ 3456 if (ni->ni_flags & IEEE80211_NODE_QOS) { 3457 /* NB: force all management frames to highest queue */ 3458 pri = WME_AC_VO; 3459 } else 3460 pri = WME_AC_BE; 3461 flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 3462 break; 3463 case IEEE80211_FC0_TYPE_CTL: 3464 atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 3465 rix = 0; /* XXX lowest rate */ 3466 try0 = ATH_TXMAXTRY; 3467 if (shortPreamble) 3468 txrate = an->an_tx_mgtratesp; 3469 else 3470 txrate = an->an_tx_mgtrate; 3471 /* NB: force all ctl frames to highest queue */ 3472 if (ni->ni_flags & IEEE80211_NODE_QOS) { 3473 /* NB: force all ctl frames to highest queue */ 3474 pri = WME_AC_VO; 3475 } else 3476 pri = WME_AC_BE; 3477 flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 3478 break; 3479 case IEEE80211_FC0_TYPE_DATA: 3480 atype = HAL_PKT_TYPE_NORMAL; /* default */ 3481 /* 3482 * Data frames; consult the rate control module for 3483 * unicast frames. Send multicast frames at the 3484 * lowest rate. 3485 */ 3486 if (!ismcast) { 3487 ath_rate_findrate(sc, an, shortPreamble, pktlen, 3488 &rix, &try0, &txrate); 3489 } else { 3490 rix = 0; 3491 try0 = ATH_TXMAXTRY; 3492 txrate = an->an_tx_mgtrate; 3493 } 3494 sc->sc_txrate = txrate; /* for LED blinking */ 3495 /* 3496 * Default all non-QoS traffic to the background queue. 3497 */ 3498 if (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_QOS) { 3499 pri = M_WME_GETAC(m0); 3500 if (cap->cap_wmeParams[pri].wmep_noackPolicy) { 3501 flags |= HAL_TXDESC_NOACK; 3502 sc->sc_stats.ast_tx_noack++; 3503 } 3504 } else 3505 pri = WME_AC_BE; 3506 break; 3507 default: 3508 if_printf(ifp, "bogus frame type 0x%x (%s)\n", 3509 wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 3510 /* XXX statistic */ 3511 m_freem(m0); 3512 return EIO; 3513 } 3514 txq = sc->sc_ac2q[pri]; 3515 3516 /* 3517 * When servicing one or more stations in power-save mode 3518 * multicast frames must be buffered until after the beacon. 3519 * We use the CAB queue for that. 3520 */ 3521 if (ismcast && ic->ic_ps_sta) { 3522 txq = sc->sc_cabq; 3523 /* XXX? more bit in 802.11 frame header */ 3524 } 3525 3526 /* 3527 * Calculate miscellaneous flags. 3528 */ 3529 if (ismcast) { 3530 flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 3531 sc->sc_stats.ast_tx_noack++; 3532 } else if (pktlen > ic->ic_rtsthreshold) { 3533 flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 3534 cix = rt->info[rix].controlRate; 3535 sc->sc_stats.ast_tx_rts++; 3536 } 3537 3538 /* 3539 * If 802.11g protection is enabled, determine whether 3540 * to use RTS/CTS or just CTS. Note that this is only 3541 * done for OFDM unicast frames. 3542 */ 3543 if ((ic->ic_flags & IEEE80211_F_USEPROT) && 3544 rt->info[rix].phy == IEEE80211_T_OFDM && 3545 (flags & HAL_TXDESC_NOACK) == 0) { 3546 /* XXX fragments must use CCK rates w/ protection */ 3547 if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) 3548 flags |= HAL_TXDESC_RTSENA; 3549 else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) 3550 flags |= HAL_TXDESC_CTSENA; 3551 cix = rt->info[sc->sc_protrix].controlRate; 3552 sc->sc_stats.ast_tx_protect++; 3553 } 3554 3555 /* 3556 * Calculate duration. This logically belongs in the 802.11 3557 * layer but it lacks sufficient information to calculate it. 3558 */ 3559 if ((flags & HAL_TXDESC_NOACK) == 0 && 3560 (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 3561 u_int16_t dur; 3562 /* 3563 * XXX not right with fragmentation. 3564 */ 3565 if (shortPreamble) 3566 dur = rt->info[rix].spAckDuration; 3567 else 3568 dur = rt->info[rix].lpAckDuration; 3569 *(u_int16_t *)wh->i_dur = htole16(dur); 3570 } 3571 3572 /* 3573 * Calculate RTS/CTS rate and duration if needed. 3574 */ 3575 ctsduration = 0; 3576 if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) { 3577 /* 3578 * CTS transmit rate is derived from the transmit rate 3579 * by looking in the h/w rate table. We must also factor 3580 * in whether or not a short preamble is to be used. 3581 */ 3582 /* NB: cix is set above where RTS/CTS is enabled */ 3583 KASSERT(cix != 0xff, ("cix not setup")); 3584 ctsrate = rt->info[cix].rateCode; 3585 /* 3586 * Compute the transmit duration based on the frame 3587 * size and the size of an ACK frame. We call into the 3588 * HAL to do the computation since it depends on the 3589 * characteristics of the actual PHY being used. 3590 * 3591 * NB: CTS is assumed the same size as an ACK so we can 3592 * use the precalculated ACK durations. 3593 */ 3594 if (shortPreamble) { 3595 ctsrate |= rt->info[cix].shortPreamble; 3596 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 3597 ctsduration += rt->info[cix].spAckDuration; 3598 ctsduration += ath_hal_computetxtime(ah, 3599 rt, pktlen, rix, AH_TRUE); 3600 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 3601 ctsduration += rt->info[rix].spAckDuration; 3602 } else { 3603 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 3604 ctsduration += rt->info[cix].lpAckDuration; 3605 ctsduration += ath_hal_computetxtime(ah, 3606 rt, pktlen, rix, AH_FALSE); 3607 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 3608 ctsduration += rt->info[rix].lpAckDuration; 3609 } 3610 /* 3611 * Must disable multi-rate retry when using RTS/CTS. 3612 */ 3613 try0 = ATH_TXMAXTRY; 3614 } else 3615 ctsrate = 0; 3616 3617 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 3618 ieee80211_dump_pkt(mtod(m0, caddr_t), m0->m_len, 3619 sc->sc_hwmap[txrate].ieeerate, -1); 3620 3621 if (ic->ic_rawbpf) 3622 bpf_mtap(ic->ic_rawbpf, m0); 3623 if (sc->sc_drvbpf) { 3624 sc->sc_tx_th.wt_flags = sc->sc_hwmap[txrate].txflags; 3625 if (iswep) 3626 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 3627 sc->sc_tx_th.wt_rate = sc->sc_hwmap[txrate].ieeerate; 3628 sc->sc_tx_th.wt_txpower = ni->ni_txpower; 3629 sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 3630 3631 bpf_mtap2(sc->sc_drvbpf, 3632 &sc->sc_tx_th, sc->sc_tx_th_len, m0); 3633 } 3634 3635 /* 3636 * Determine if a tx interrupt should be generated for 3637 * this descriptor. We take a tx interrupt to reap 3638 * descriptors when the h/w hits an EOL condition or 3639 * when the descriptor is specifically marked to generate 3640 * an interrupt. We periodically mark descriptors in this 3641 * way to insure timely replenishing of the supply needed 3642 * for sending frames. Defering interrupts reduces system 3643 * load and potentially allows more concurrent work to be 3644 * done but if done to aggressively can cause senders to 3645 * backup. 3646 * 3647 * NB: use >= to deal with sc_txintrperiod changing 3648 * dynamically through sysctl. 3649 */ 3650 if (flags & HAL_TXDESC_INTREQ) { 3651 txq->axq_intrcnt = 0; 3652 } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 3653 flags |= HAL_TXDESC_INTREQ; 3654 txq->axq_intrcnt = 0; 3655 } 3656 3657 /* 3658 * Formulate first tx descriptor with tx controls. 3659 */ 3660 /* XXX check return value? */ 3661 ath_hal_setuptxdesc(ah, ds 3662 , pktlen /* packet length */ 3663 , hdrlen /* header length */ 3664 , atype /* Atheros packet type */ 3665 , ni->ni_txpower /* txpower */ 3666 , txrate, try0 /* series 0 rate/tries */ 3667 , keyix /* key cache index */ 3668 , sc->sc_txantenna /* antenna mode */ 3669 , flags /* flags */ 3670 , ctsrate /* rts/cts rate */ 3671 , ctsduration /* rts/cts duration */ 3672 ); 3673 bf->bf_flags = flags; 3674 /* 3675 * Setup the multi-rate retry state only when we're 3676 * going to use it. This assumes ath_hal_setuptxdesc 3677 * initializes the descriptors (so we don't have to) 3678 * when the hardware supports multi-rate retry and 3679 * we don't use it. 3680 */ 3681 if (try0 != ATH_TXMAXTRY) 3682 ath_rate_setupxtxdesc(sc, an, ds, shortPreamble, rix); 3683 3684 /* 3685 * Fillin the remainder of the descriptor info. 3686 */ 3687 ds0 = ds; 3688 for (i = 0; i < bf->bf_nseg; i++, ds++) { 3689 ds->ds_data = bf->bf_segs[i].ds_addr; 3690 if (i == bf->bf_nseg - 1) 3691 ds->ds_link = 0; 3692 else 3693 ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 3694 ath_hal_filltxdesc(ah, ds 3695 , bf->bf_segs[i].ds_len /* segment length */ 3696 , i == 0 /* first segment */ 3697 , i == bf->bf_nseg - 1 /* last segment */ 3698 , ds0 /* first descriptor */ 3699 ); 3700 DPRINTF(sc, ATH_DEBUG_XMIT, 3701 "%s: %d: %08x %08x %08x %08x %08x %08x\n", 3702 __func__, i, ds->ds_link, ds->ds_data, 3703 ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 3704 } 3705 /* 3706 * Insert the frame on the outbound list and 3707 * pass it on to the hardware. 3708 */ 3709 ATH_TXQ_LOCK(txq); 3710 if (flags & (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) { 3711 u_int32_t txopLimit = IEEE80211_TXOP_TO_US( 3712 cap->cap_wmeParams[pri].wmep_txopLimit); 3713 /* 3714 * When bursting, potentially extend the CTS duration 3715 * of a previously queued frame to cover this frame 3716 * and not exceed the txopLimit. If that can be done 3717 * then disable RTS/CTS on this frame since it's now 3718 * covered (burst extension). Otherwise we must terminate 3719 * the burst before this frame goes out so as not to 3720 * violate the WME parameters. All this is complicated 3721 * as we need to update the state of packets on the 3722 * (live) hardware queue. The logic is buried in the hal 3723 * because it's highly chip-specific. 3724 */ 3725 if (txopLimit != 0) { 3726 sc->sc_stats.ast_tx_ctsburst++; 3727 if (updateCTSForBursting(ah, ds0, txq) == 0) { 3728 /* 3729 * This frame was not covered by RTS/CTS from 3730 * the previous frame in the burst; update the 3731 * descriptor pointers so this frame is now 3732 * treated as the last frame for extending a 3733 * burst. 3734 */ 3735 txq->axq_lastdsWithCTS = ds0; 3736 /* set gating Desc to final desc */ 3737 txq->axq_gatingds = 3738 (struct ath_desc *)txq->axq_link; 3739 } else 3740 sc->sc_stats.ast_tx_ctsext++; 3741 } 3742 } 3743 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 3744 if (txq->axq_link == NULL) { 3745 ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 3746 DPRINTF(sc, ATH_DEBUG_XMIT, 3747 "%s: TXDP[%u] = %p (%p) depth %d\n", __func__, 3748 txq->axq_qnum, (caddr_t)bf->bf_daddr, bf->bf_desc, 3749 txq->axq_depth); 3750 } else { 3751 *txq->axq_link = bf->bf_daddr; 3752 DPRINTF(sc, ATH_DEBUG_XMIT, 3753 "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 3754 txq->axq_qnum, txq->axq_link, 3755 (caddr_t)bf->bf_daddr, bf->bf_desc, txq->axq_depth); 3756 } 3757 txq->axq_link = &bf->bf_desc[bf->bf_nseg - 1].ds_link; 3758 /* 3759 * The CAB queue is started from the SWBA handler since 3760 * frames only go out on DTIM and to avoid possible races. 3761 */ 3762 if (txq != sc->sc_cabq) 3763 ath_hal_txstart(ah, txq->axq_qnum); 3764 ATH_TXQ_UNLOCK(txq); 3765 3766 return 0; 3767 #undef updateCTSForBursting 3768 #undef CTS_DURATION 3769 } 3770 3771 /* 3772 * Process completed xmit descriptors from the specified queue. 3773 */ 3774 static void 3775 ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) 3776 { 3777 struct ath_hal *ah = sc->sc_ah; 3778 struct ieee80211com *ic = &sc->sc_ic; 3779 struct ath_buf *bf; 3780 struct ath_desc *ds, *ds0; 3781 struct ieee80211_node *ni; 3782 struct ath_node *an; 3783 int sr, lr, pri; 3784 HAL_STATUS status; 3785 3786 DPRINTF(sc, ATH_DEBUG_TX_PROC, "%s: tx queue %u head %p link %p\n", 3787 __func__, txq->axq_qnum, 3788 (caddr_t)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum), 3789 txq->axq_link); 3790 for (;;) { 3791 ATH_TXQ_LOCK(txq); 3792 txq->axq_intrcnt = 0; /* reset periodic desc intr count */ 3793 bf = STAILQ_FIRST(&txq->axq_q); 3794 if (bf == NULL) { 3795 txq->axq_link = NULL; 3796 ATH_TXQ_UNLOCK(txq); 3797 break; 3798 } 3799 ds0 = &bf->bf_desc[0]; 3800 ds = &bf->bf_desc[bf->bf_nseg - 1]; 3801 status = ath_hal_txprocdesc(ah, ds); 3802 #ifdef AR_DEBUG 3803 if (sc->sc_debug & ATH_DEBUG_XMIT_DESC) 3804 ath_printtxbuf(bf, status == HAL_OK); 3805 #endif 3806 if (status == HAL_EINPROGRESS) { 3807 ATH_TXQ_UNLOCK(txq); 3808 break; 3809 } 3810 if (ds0 == txq->axq_lastdsWithCTS) 3811 txq->axq_lastdsWithCTS = NULL; 3812 if (ds == txq->axq_gatingds) 3813 txq->axq_gatingds = NULL; 3814 ATH_TXQ_REMOVE_HEAD(txq, bf_list); 3815 ATH_TXQ_UNLOCK(txq); 3816 3817 ni = bf->bf_node; 3818 if (ni != NULL) { 3819 an = ATH_NODE(ni); 3820 if (ds->ds_txstat.ts_status == 0) { 3821 u_int8_t txant = ds->ds_txstat.ts_antenna; 3822 sc->sc_stats.ast_ant_tx[txant]++; 3823 sc->sc_ant_tx[txant]++; 3824 if (ds->ds_txstat.ts_rate & HAL_TXSTAT_ALTRATE) 3825 sc->sc_stats.ast_tx_altrate++; 3826 sc->sc_stats.ast_tx_rssi = 3827 ds->ds_txstat.ts_rssi; 3828 ATH_RSSI_LPF(an->an_halstats.ns_avgtxrssi, 3829 ds->ds_txstat.ts_rssi); 3830 pri = M_WME_GETAC(bf->bf_m); 3831 if (pri >= WME_AC_VO) 3832 ic->ic_wme.wme_hipri_traffic++; 3833 ni->ni_inact = ni->ni_inact_reload; 3834 } else { 3835 if (ds->ds_txstat.ts_status & HAL_TXERR_XRETRY) 3836 sc->sc_stats.ast_tx_xretries++; 3837 if (ds->ds_txstat.ts_status & HAL_TXERR_FIFO) 3838 sc->sc_stats.ast_tx_fifoerr++; 3839 if (ds->ds_txstat.ts_status & HAL_TXERR_FILT) 3840 sc->sc_stats.ast_tx_filtered++; 3841 } 3842 sr = ds->ds_txstat.ts_shortretry; 3843 lr = ds->ds_txstat.ts_longretry; 3844 sc->sc_stats.ast_tx_shortretry += sr; 3845 sc->sc_stats.ast_tx_longretry += lr; 3846 /* 3847 * Hand the descriptor to the rate control algorithm. 3848 */ 3849 if ((ds->ds_txstat.ts_status & HAL_TXERR_FILT) == 0 && 3850 (bf->bf_flags & HAL_TXDESC_NOACK) == 0) 3851 ath_rate_tx_complete(sc, an, ds, ds0); 3852 /* 3853 * Reclaim reference to node. 3854 * 3855 * NB: the node may be reclaimed here if, for example 3856 * this is a DEAUTH message that was sent and the 3857 * node was timed out due to inactivity. 3858 */ 3859 ieee80211_free_node(ni); 3860 } 3861 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 0, 3862 bf->bf_dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE); 3863 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 3864 m_freem(bf->bf_m); 3865 bf->bf_m = NULL; 3866 bf->bf_node = NULL; 3867 3868 ATH_TXBUF_LOCK(sc); 3869 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 3870 ATH_TXBUF_UNLOCK(sc); 3871 } 3872 } 3873 3874 /* 3875 * Deferred processing of transmit interrupt; special-cased 3876 * for a single hardware transmit queue (e.g. 5210 and 5211). 3877 */ 3878 static void 3879 ath_tx_proc_q0(void *arg, int npending) 3880 { 3881 struct ath_softc *sc = arg; 3882 struct ifnet *ifp = &sc->sc_if; 3883 3884 ath_tx_processq(sc, &sc->sc_txq[0]); 3885 ath_tx_processq(sc, sc->sc_cabq); 3886 ifp->if_flags &= ~IFF_OACTIVE; 3887 sc->sc_tx_timer = 0; 3888 3889 if (sc->sc_softled) 3890 ath_led_event(sc, ATH_LED_TX); 3891 3892 ath_start(ifp); 3893 } 3894 3895 /* 3896 * Deferred processing of transmit interrupt; special-cased 3897 * for four hardware queues, 0-3 (e.g. 5212 w/ WME support). 3898 */ 3899 static void 3900 ath_tx_proc_q0123(void *arg, int npending) 3901 { 3902 struct ath_softc *sc = arg; 3903 struct ifnet *ifp = &sc->sc_if; 3904 3905 /* 3906 * Process each active queue. 3907 */ 3908 ath_tx_processq(sc, &sc->sc_txq[0]); 3909 ath_tx_processq(sc, &sc->sc_txq[1]); 3910 ath_tx_processq(sc, &sc->sc_txq[2]); 3911 ath_tx_processq(sc, &sc->sc_txq[3]); 3912 ath_tx_processq(sc, sc->sc_cabq); 3913 3914 ifp->if_flags &= ~IFF_OACTIVE; 3915 sc->sc_tx_timer = 0; 3916 3917 if (sc->sc_softled) 3918 ath_led_event(sc, ATH_LED_TX); 3919 3920 ath_start(ifp); 3921 } 3922 3923 /* 3924 * Deferred processing of transmit interrupt. 3925 */ 3926 static void 3927 ath_tx_proc(void *arg, int npending) 3928 { 3929 struct ath_softc *sc = arg; 3930 struct ifnet *ifp = &sc->sc_if; 3931 int i; 3932 3933 /* 3934 * Process each active queue. 3935 */ 3936 /* XXX faster to read ISR_S0_S and ISR_S1_S to determine q's? */ 3937 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 3938 if (ATH_TXQ_SETUP(sc, i)) 3939 ath_tx_processq(sc, &sc->sc_txq[i]); 3940 3941 ifp->if_flags &= ~IFF_OACTIVE; 3942 sc->sc_tx_timer = 0; 3943 3944 if (sc->sc_softled) 3945 ath_led_event(sc, ATH_LED_TX); 3946 3947 ath_start(ifp); 3948 } 3949 3950 static void 3951 ath_tx_draintxq(struct ath_softc *sc, struct ath_txq *txq) 3952 { 3953 struct ath_hal *ah = sc->sc_ah; 3954 struct ieee80211_node *ni; 3955 struct ath_buf *bf; 3956 3957 /* 3958 * NB: this assumes output has been stopped and 3959 * we do not need to block ath_tx_tasklet 3960 */ 3961 for (;;) { 3962 ATH_TXQ_LOCK(txq); 3963 bf = STAILQ_FIRST(&txq->axq_q); 3964 if (bf == NULL) { 3965 txq->axq_link = NULL; 3966 ATH_TXQ_UNLOCK(txq); 3967 break; 3968 } 3969 ATH_TXQ_REMOVE_HEAD(txq, bf_list); 3970 ATH_TXQ_UNLOCK(txq); 3971 #ifdef AR_DEBUG 3972 if (sc->sc_debug & ATH_DEBUG_RESET) 3973 ath_printtxbuf(bf, 3974 ath_hal_txprocdesc(ah, bf->bf_desc) == HAL_OK); 3975 #endif /* AR_DEBUG */ 3976 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 3977 m_freem(bf->bf_m); 3978 bf->bf_m = NULL; 3979 ni = bf->bf_node; 3980 bf->bf_node = NULL; 3981 if (ni != NULL) { 3982 /* 3983 * Reclaim node reference. 3984 */ 3985 ieee80211_free_node(ni); 3986 } 3987 ATH_TXBUF_LOCK(sc); 3988 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 3989 ATH_TXBUF_UNLOCK(sc); 3990 } 3991 } 3992 3993 static void 3994 ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq) 3995 { 3996 struct ath_hal *ah = sc->sc_ah; 3997 3998 (void) ath_hal_stoptxdma(ah, txq->axq_qnum); 3999 DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n", 4000 __func__, txq->axq_qnum, 4001 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, txq->axq_qnum), 4002 txq->axq_link); 4003 } 4004 4005 /* 4006 * Drain the transmit queues and reclaim resources. 4007 */ 4008 static void 4009 ath_draintxq(struct ath_softc *sc) 4010 { 4011 struct ath_hal *ah = sc->sc_ah; 4012 struct ifnet *ifp = &sc->sc_if; 4013 int i; 4014 4015 /* XXX return value */ 4016 if (!sc->sc_invalid) { 4017 /* don't touch the hardware if marked invalid */ 4018 (void) ath_hal_stoptxdma(ah, sc->sc_bhalq); 4019 DPRINTF(sc, ATH_DEBUG_RESET, 4020 "%s: beacon queue %p\n", __func__, 4021 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, sc->sc_bhalq)); 4022 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4023 if (ATH_TXQ_SETUP(sc, i)) 4024 ath_tx_stopdma(sc, &sc->sc_txq[i]); 4025 } 4026 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4027 if (ATH_TXQ_SETUP(sc, i)) 4028 ath_tx_draintxq(sc, &sc->sc_txq[i]); 4029 ifp->if_flags &= ~IFF_OACTIVE; 4030 sc->sc_tx_timer = 0; 4031 } 4032 4033 /* 4034 * Disable the receive h/w in preparation for a reset. 4035 */ 4036 static void 4037 ath_stoprecv(struct ath_softc *sc) 4038 { 4039 #define PA2DESC(_sc, _pa) \ 4040 ((struct ath_desc *)((caddr_t)(_sc)->sc_rxdma.dd_desc + \ 4041 ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr))) 4042 struct ath_hal *ah = sc->sc_ah; 4043 4044 ath_hal_stoppcurecv(ah); /* disable PCU */ 4045 ath_hal_setrxfilter(ah, 0); /* clear recv filter */ 4046 ath_hal_stopdmarecv(ah); /* disable DMA engine */ 4047 DELAY(3000); /* 3ms is long enough for 1 frame */ 4048 #ifdef AR_DEBUG 4049 if (sc->sc_debug & (ATH_DEBUG_RESET | ATH_DEBUG_FATAL)) { 4050 struct ath_buf *bf; 4051 4052 printf("%s: rx queue %p, link %p\n", __func__, 4053 (caddr_t)(uintptr_t) ath_hal_getrxbuf(ah), sc->sc_rxlink); 4054 STAILQ_FOREACH(bf, &sc->sc_rxbuf, bf_list) { 4055 struct ath_desc *ds = bf->bf_desc; 4056 HAL_STATUS status = ath_hal_rxprocdesc(ah, ds, 4057 bf->bf_daddr, PA2DESC(sc, ds->ds_link)); 4058 if (status == HAL_OK || (sc->sc_debug & ATH_DEBUG_FATAL)) 4059 ath_printrxbuf(bf, status == HAL_OK); 4060 } 4061 } 4062 #endif 4063 sc->sc_rxlink = NULL; /* just in case */ 4064 #undef PA2DESC 4065 } 4066 4067 /* 4068 * Enable the receive h/w following a reset. 4069 */ 4070 static int 4071 ath_startrecv(struct ath_softc *sc) 4072 { 4073 struct ath_hal *ah = sc->sc_ah; 4074 struct ath_buf *bf; 4075 4076 sc->sc_rxlink = NULL; 4077 STAILQ_FOREACH(bf, &sc->sc_rxbuf, bf_list) { 4078 int error = ath_rxbuf_init(sc, bf); 4079 if (error != 0) { 4080 DPRINTF(sc, ATH_DEBUG_RECV, 4081 "%s: ath_rxbuf_init failed %d\n", 4082 __func__, error); 4083 return error; 4084 } 4085 } 4086 4087 bf = STAILQ_FIRST(&sc->sc_rxbuf); 4088 ath_hal_putrxbuf(ah, bf->bf_daddr); 4089 ath_hal_rxena(ah); /* enable recv descriptors */ 4090 ath_mode_init(sc); /* set filters, etc. */ 4091 ath_hal_startpcurecv(ah); /* re-enable PCU/DMA engine */ 4092 return 0; 4093 } 4094 4095 /* 4096 * Update internal state after a channel change. 4097 */ 4098 static void 4099 ath_chan_change(struct ath_softc *sc, struct ieee80211_channel *chan) 4100 { 4101 struct ieee80211com *ic = &sc->sc_ic; 4102 enum ieee80211_phymode mode; 4103 u_int16_t flags; 4104 4105 /* 4106 * Change channels and update the h/w rate map 4107 * if we're switching; e.g. 11a to 11b/g. 4108 */ 4109 mode = ieee80211_chan2mode(ic, chan); 4110 if (mode != sc->sc_curmode) 4111 ath_setcurmode(sc, mode); 4112 /* 4113 * Update BPF state. NB: ethereal et. al. don't handle 4114 * merged flags well so pick a unique mode for their use. 4115 */ 4116 if (IEEE80211_IS_CHAN_A(chan)) 4117 flags = IEEE80211_CHAN_A; 4118 /* XXX 11g schizophrenia */ 4119 else if (IEEE80211_IS_CHAN_G(chan) || 4120 IEEE80211_IS_CHAN_PUREG(chan)) 4121 flags = IEEE80211_CHAN_G; 4122 else 4123 flags = IEEE80211_CHAN_B; 4124 if (IEEE80211_IS_CHAN_T(chan)) 4125 flags |= IEEE80211_CHAN_TURBO; 4126 sc->sc_tx_th.wt_chan_freq = sc->sc_rx_th.wr_chan_freq = 4127 htole16(chan->ic_freq); 4128 sc->sc_tx_th.wt_chan_flags = sc->sc_rx_th.wr_chan_flags = 4129 htole16(flags); 4130 } 4131 4132 /* 4133 * Set/change channels. If the channel is really being changed, 4134 * it's done by reseting the chip. To accomplish this we must 4135 * first cleanup any pending DMA, then restart stuff after a la 4136 * ath_init. 4137 */ 4138 static int 4139 ath_chan_set(struct ath_softc *sc, struct ieee80211_channel *chan) 4140 { 4141 struct ath_hal *ah = sc->sc_ah; 4142 struct ieee80211com *ic = &sc->sc_ic; 4143 HAL_CHANNEL hchan; 4144 4145 /* 4146 * Convert to a HAL channel description with 4147 * the flags constrained to reflect the current 4148 * operating mode. 4149 */ 4150 hchan.channel = chan->ic_freq; 4151 hchan.channelFlags = ath_chan2flags(ic, chan); 4152 4153 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %u (%u MHz) -> %u (%u MHz)\n", 4154 __func__, 4155 ath_hal_mhz2ieee(sc->sc_curchan.channel, 4156 sc->sc_curchan.channelFlags), 4157 sc->sc_curchan.channel, 4158 ath_hal_mhz2ieee(hchan.channel, hchan.channelFlags), hchan.channel); 4159 if (hchan.channel != sc->sc_curchan.channel || 4160 hchan.channelFlags != sc->sc_curchan.channelFlags) { 4161 HAL_STATUS status; 4162 4163 /* 4164 * To switch channels clear any pending DMA operations; 4165 * wait long enough for the RX fifo to drain, reset the 4166 * hardware at the new frequency, and then re-enable 4167 * the relevant bits of the h/w. 4168 */ 4169 ath_hal_intrset(ah, 0); /* disable interrupts */ 4170 ath_draintxq(sc); /* clear pending tx frames */ 4171 ath_stoprecv(sc); /* turn off frame recv */ 4172 if (!ath_hal_reset(ah, ic->ic_opmode, &hchan, AH_TRUE, &status)) { 4173 if_printf(&sc->sc_if, "ath_chan_set: unable to reset " 4174 "channel %u (%u Mhz)\n", 4175 ieee80211_chan2ieee(ic, chan), chan->ic_freq); 4176 return EIO; 4177 } 4178 sc->sc_curchan = hchan; 4179 ath_update_txpow(sc); /* update tx power state */ 4180 sc->sc_diversity = ath_hal_getdiversity(ah); 4181 4182 /* 4183 * Re-enable rx framework. 4184 */ 4185 if (ath_startrecv(sc) != 0) { 4186 if_printf(&sc->sc_if, 4187 "ath_chan_set: unable to restart recv logic\n"); 4188 return EIO; 4189 } 4190 4191 /* 4192 * Change channels and update the h/w rate map 4193 * if we're switching; e.g. 11a to 11b/g. 4194 */ 4195 ic->ic_ibss_chan = chan; 4196 ath_chan_change(sc, chan); 4197 4198 /* 4199 * Re-enable interrupts. 4200 */ 4201 ath_hal_intrset(ah, sc->sc_imask); 4202 } 4203 return 0; 4204 } 4205 4206 static void 4207 ath_next_scan(void *arg) 4208 { 4209 struct ath_softc *sc = arg; 4210 struct ieee80211com *ic = &sc->sc_ic; 4211 int s; 4212 4213 /* don't call ath_start w/o network interrupts blocked */ 4214 s = splnet(); 4215 4216 if (ic->ic_state == IEEE80211_S_SCAN) 4217 ieee80211_next_scan(ic); 4218 splx(s); 4219 } 4220 4221 /* 4222 * Periodically recalibrate the PHY to account 4223 * for temperature/environment changes. 4224 */ 4225 static void 4226 ath_calibrate(void *arg) 4227 { 4228 struct ath_softc *sc = arg; 4229 struct ath_hal *ah = sc->sc_ah; 4230 4231 sc->sc_stats.ast_per_cal++; 4232 4233 ATH_LOCK(sc); 4234 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: channel %u/%x\n", 4235 __func__, sc->sc_curchan.channel, sc->sc_curchan.channelFlags); 4236 4237 if (ath_hal_getrfgain(ah) == HAL_RFGAIN_NEED_CHANGE) { 4238 /* 4239 * Rfgain is out of bounds, reset the chip 4240 * to load new gain values. 4241 */ 4242 sc->sc_stats.ast_per_rfgain++; 4243 ath_reset(&sc->sc_if); 4244 } 4245 if (!ath_hal_calibrate(ah, &sc->sc_curchan)) { 4246 DPRINTF(sc, ATH_DEBUG_ANY, 4247 "%s: calibration of channel %u failed\n", 4248 __func__, sc->sc_curchan.channel); 4249 sc->sc_stats.ast_per_calfail++; 4250 } 4251 callout_reset(&sc->sc_cal_ch, ath_calinterval * hz, ath_calibrate, sc); 4252 ATH_UNLOCK(sc); 4253 } 4254 4255 static int 4256 ath_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 4257 { 4258 struct ifnet *ifp = ic->ic_ifp; 4259 struct ath_softc *sc = ifp->if_softc; 4260 struct ath_hal *ah = sc->sc_ah; 4261 struct ieee80211_node *ni; 4262 int i, error; 4263 const u_int8_t *bssid; 4264 u_int32_t rfilt; 4265 static const HAL_LED_STATE leds[] = { 4266 HAL_LED_INIT, /* IEEE80211_S_INIT */ 4267 HAL_LED_SCAN, /* IEEE80211_S_SCAN */ 4268 HAL_LED_AUTH, /* IEEE80211_S_AUTH */ 4269 HAL_LED_ASSOC, /* IEEE80211_S_ASSOC */ 4270 HAL_LED_RUN, /* IEEE80211_S_RUN */ 4271 }; 4272 4273 DPRINTF(sc, ATH_DEBUG_STATE, "%s: %s -> %s\n", __func__, 4274 ieee80211_state_name[ic->ic_state], 4275 ieee80211_state_name[nstate]); 4276 4277 callout_stop(&sc->sc_scan_ch); 4278 callout_stop(&sc->sc_cal_ch); 4279 ath_hal_setledstate(ah, leds[nstate]); /* set LED */ 4280 4281 if (nstate == IEEE80211_S_INIT) { 4282 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 4283 /* 4284 * NB: disable interrupts so we don't rx frames. 4285 */ 4286 ath_hal_intrset(ah, sc->sc_imask &~ HAL_INT_GLOBAL); 4287 /* 4288 * Notify the rate control algorithm. 4289 */ 4290 ath_rate_newstate(sc, nstate); 4291 goto done; 4292 } 4293 ni = ic->ic_bss; 4294 error = ath_chan_set(sc, ic->ic_curchan); 4295 if (error != 0) 4296 goto bad; 4297 rfilt = ath_calcrxfilter(sc, nstate); 4298 if (nstate == IEEE80211_S_SCAN) 4299 bssid = ifp->if_broadcastaddr; 4300 else 4301 bssid = ni->ni_bssid; 4302 ath_hal_setrxfilter(ah, rfilt); 4303 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s\n", 4304 __func__, rfilt, ether_sprintf(bssid)); 4305 4306 if (nstate == IEEE80211_S_RUN && ic->ic_opmode == IEEE80211_M_STA) 4307 ath_hal_setassocid(ah, bssid, ni->ni_associd); 4308 else 4309 ath_hal_setassocid(ah, bssid, 0); 4310 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 4311 for (i = 0; i < IEEE80211_WEP_NKID; i++) 4312 if (ath_hal_keyisvalid(ah, i)) 4313 ath_hal_keysetmac(ah, i, bssid); 4314 } 4315 4316 /* 4317 * Notify the rate control algorithm so rates 4318 * are setup should ath_beacon_alloc be called. 4319 */ 4320 ath_rate_newstate(sc, nstate); 4321 4322 if (ic->ic_opmode == IEEE80211_M_MONITOR) { 4323 /* nothing to do */; 4324 } else if (nstate == IEEE80211_S_RUN) { 4325 DPRINTF(sc, ATH_DEBUG_STATE, 4326 "%s(RUN): ic_flags=0x%08x iv=%d bssid=%s " 4327 "capinfo=0x%04x chan=%d\n" 4328 , __func__ 4329 , ic->ic_flags 4330 , ni->ni_intval 4331 , ether_sprintf(ni->ni_bssid) 4332 , ni->ni_capinfo 4333 , ieee80211_chan2ieee(ic, ic->ic_curchan)); 4334 4335 switch (ic->ic_opmode) { 4336 case IEEE80211_M_HOSTAP: 4337 case IEEE80211_M_IBSS: 4338 /* 4339 * Allocate and setup the beacon frame. 4340 * 4341 * Stop any previous beacon DMA. This may be 4342 * necessary, for example, when an ibss merge 4343 * causes reconfiguration; there will be a state 4344 * transition from RUN->RUN that means we may 4345 * be called with beacon transmission active. 4346 */ 4347 ath_hal_stoptxdma(ah, sc->sc_bhalq); 4348 ath_beacon_free(sc); 4349 error = ath_beacon_alloc(sc, ni); 4350 if (error != 0) 4351 goto bad; 4352 break; 4353 case IEEE80211_M_STA: 4354 /* 4355 * Allocate a key cache slot to the station. 4356 */ 4357 if ((ic->ic_flags & IEEE80211_F_PRIVACY) == 0 && 4358 sc->sc_hasclrkey && 4359 ni->ni_ucastkey.wk_keyix == IEEE80211_KEYIX_NONE) 4360 ath_setup_stationkey(ni); 4361 break; 4362 default: 4363 break; 4364 } 4365 4366 /* 4367 * Configure the beacon and sleep timers. 4368 */ 4369 ath_beacon_config(sc); 4370 } else { 4371 ath_hal_intrset(ah, 4372 sc->sc_imask &~ (HAL_INT_SWBA | HAL_INT_BMISS)); 4373 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 4374 } 4375 done: 4376 /* 4377 * Invoke the parent method to complete the work. 4378 */ 4379 error = sc->sc_newstate(ic, nstate, arg); 4380 /* 4381 * Finally, start any timers. 4382 */ 4383 if (nstate == IEEE80211_S_RUN) { 4384 /* start periodic recalibration timer */ 4385 callout_reset(&sc->sc_cal_ch, ath_calinterval * hz, 4386 ath_calibrate, sc); 4387 } else if (nstate == IEEE80211_S_SCAN) { 4388 /* start ap/neighbor scan timer */ 4389 callout_reset(&sc->sc_scan_ch, (ath_dwelltime * hz) / 1000, 4390 ath_next_scan, sc); 4391 } 4392 bad: 4393 return error; 4394 } 4395 4396 /* 4397 * Allocate a key cache slot to the station so we can 4398 * setup a mapping from key index to node. The key cache 4399 * slot is needed for managing antenna state and for 4400 * compression when stations do not use crypto. We do 4401 * it uniliaterally here; if crypto is employed this slot 4402 * will be reassigned. 4403 */ 4404 static void 4405 ath_setup_stationkey(struct ieee80211_node *ni) 4406 { 4407 struct ieee80211com *ic = ni->ni_ic; 4408 struct ath_softc *sc = ic->ic_ifp->if_softc; 4409 ieee80211_keyix keyix, rxkeyix; 4410 4411 if (!ath_key_alloc(ic, &ni->ni_ucastkey, &keyix, &rxkeyix)) { 4412 /* 4413 * Key cache is full; we'll fall back to doing 4414 * the more expensive lookup in software. Note 4415 * this also means no h/w compression. 4416 */ 4417 /* XXX msg+statistic */ 4418 } else { 4419 /* XXX locking? */ 4420 ni->ni_ucastkey.wk_keyix = keyix; 4421 ni->ni_ucastkey.wk_rxkeyix = rxkeyix; 4422 /* NB: this will create a pass-thru key entry */ 4423 ath_keyset(sc, &ni->ni_ucastkey, ni->ni_macaddr, ic->ic_bss); 4424 } 4425 } 4426 4427 /* 4428 * Setup driver-specific state for a newly associated node. 4429 * Note that we're called also on a re-associate, the isnew 4430 * param tells us if this is the first time or not. 4431 */ 4432 static void 4433 ath_newassoc(struct ieee80211_node *ni, int isnew) 4434 { 4435 struct ieee80211com *ic = ni->ni_ic; 4436 struct ath_softc *sc = ic->ic_ifp->if_softc; 4437 4438 ath_rate_newassoc(sc, ATH_NODE(ni), isnew); 4439 if (isnew && 4440 (ic->ic_flags & IEEE80211_F_PRIVACY) == 0 && sc->sc_hasclrkey) { 4441 KASSERT(ni->ni_ucastkey.wk_keyix == IEEE80211_KEYIX_NONE, 4442 ("new assoc with a unicast key already setup (keyix %u)", 4443 ni->ni_ucastkey.wk_keyix)); 4444 ath_setup_stationkey(ni); 4445 } 4446 } 4447 4448 static int 4449 ath_getchannels(struct ath_softc *sc, u_int cc, 4450 HAL_BOOL outdoor, HAL_BOOL xchanmode) 4451 { 4452 struct ieee80211com *ic = &sc->sc_ic; 4453 struct ifnet *ifp = &sc->sc_if; 4454 struct ath_hal *ah = sc->sc_ah; 4455 HAL_CHANNEL *chans; 4456 int i, ix, nchan; 4457 4458 chans = malloc(IEEE80211_CHAN_MAX * sizeof(HAL_CHANNEL), 4459 M_TEMP, M_NOWAIT); 4460 if (chans == NULL) { 4461 if_printf(ifp, "unable to allocate channel table\n"); 4462 return ENOMEM; 4463 } 4464 if (!ath_hal_init_channels(ah, chans, IEEE80211_CHAN_MAX, &nchan, 4465 cc, HAL_MODE_ALL, outdoor, xchanmode)) { 4466 u_int32_t rd; 4467 4468 ath_hal_getregdomain(ah, &rd); 4469 if_printf(ifp, "unable to collect channel list from hal; " 4470 "regdomain likely %u country code %u\n", rd, cc); 4471 free(chans, M_TEMP); 4472 return EINVAL; 4473 } 4474 4475 /* 4476 * Convert HAL channels to ieee80211 ones and insert 4477 * them in the table according to their channel number. 4478 */ 4479 for (i = 0; i < nchan; i++) { 4480 HAL_CHANNEL *c = &chans[i]; 4481 ix = ath_hal_mhz2ieee(c->channel, c->channelFlags); 4482 if (ix > IEEE80211_CHAN_MAX) { 4483 if_printf(ifp, "bad hal channel %u (%u/%x) ignored\n", 4484 ix, c->channel, c->channelFlags); 4485 continue; 4486 } 4487 DPRINTF(sc, ATH_DEBUG_ANY, 4488 "%s: HAL channel %d/%d freq %d flags %#04x idx %d\n", 4489 sc->sc_dev.dv_xname, i, nchan, c->channel, c->channelFlags, 4490 ix); 4491 /* NB: flags are known to be compatible */ 4492 if (ic->ic_channels[ix].ic_freq == 0) { 4493 ic->ic_channels[ix].ic_freq = c->channel; 4494 ic->ic_channels[ix].ic_flags = c->channelFlags; 4495 } else { 4496 /* channels overlap; e.g. 11g and 11b */ 4497 ic->ic_channels[ix].ic_flags |= c->channelFlags; 4498 } 4499 } 4500 free(chans, M_TEMP); 4501 return 0; 4502 } 4503 4504 static void 4505 ath_led_done(void *arg) 4506 { 4507 struct ath_softc *sc = arg; 4508 4509 sc->sc_blinking = 0; 4510 } 4511 4512 /* 4513 * Turn the LED off: flip the pin and then set a timer so no 4514 * update will happen for the specified duration. 4515 */ 4516 static void 4517 ath_led_off(void *arg) 4518 { 4519 struct ath_softc *sc = arg; 4520 4521 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, !sc->sc_ledon); 4522 callout_reset(&sc->sc_ledtimer, sc->sc_ledoff, ath_led_done, sc); 4523 } 4524 4525 /* 4526 * Blink the LED according to the specified on/off times. 4527 */ 4528 static void 4529 ath_led_blink(struct ath_softc *sc, int on, int off) 4530 { 4531 DPRINTF(sc, ATH_DEBUG_LED, "%s: on %u off %u\n", __func__, on, off); 4532 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, sc->sc_ledon); 4533 sc->sc_blinking = 1; 4534 sc->sc_ledoff = off; 4535 callout_reset(&sc->sc_ledtimer, on, ath_led_off, sc); 4536 } 4537 4538 static void 4539 ath_led_event(struct ath_softc *sc, int event) 4540 { 4541 4542 sc->sc_ledevent = ticks; /* time of last event */ 4543 if (sc->sc_blinking) /* don't interrupt active blink */ 4544 return; 4545 switch (event) { 4546 case ATH_LED_POLL: 4547 ath_led_blink(sc, sc->sc_hwmap[0].ledon, 4548 sc->sc_hwmap[0].ledoff); 4549 break; 4550 case ATH_LED_TX: 4551 ath_led_blink(sc, sc->sc_hwmap[sc->sc_txrate].ledon, 4552 sc->sc_hwmap[sc->sc_txrate].ledoff); 4553 break; 4554 case ATH_LED_RX: 4555 ath_led_blink(sc, sc->sc_hwmap[sc->sc_rxrate].ledon, 4556 sc->sc_hwmap[sc->sc_rxrate].ledoff); 4557 break; 4558 } 4559 } 4560 4561 static void 4562 ath_update_txpow(struct ath_softc *sc) 4563 { 4564 struct ieee80211com *ic = &sc->sc_ic; 4565 struct ath_hal *ah = sc->sc_ah; 4566 u_int32_t txpow; 4567 4568 if (sc->sc_curtxpow != ic->ic_txpowlimit) { 4569 ath_hal_settxpowlimit(ah, ic->ic_txpowlimit); 4570 /* read back in case value is clamped */ 4571 ath_hal_gettxpowlimit(ah, &txpow); 4572 ic->ic_txpowlimit = sc->sc_curtxpow = txpow; 4573 } 4574 /* 4575 * Fetch max tx power level for status requests. 4576 */ 4577 ath_hal_getmaxtxpow(sc->sc_ah, &txpow); 4578 ic->ic_bss->ni_txpower = txpow; 4579 } 4580 4581 static int 4582 ath_rate_setup(struct ath_softc *sc, u_int mode) 4583 { 4584 struct ath_hal *ah = sc->sc_ah; 4585 struct ieee80211com *ic = &sc->sc_ic; 4586 const HAL_RATE_TABLE *rt; 4587 struct ieee80211_rateset *rs; 4588 int i, maxrates; 4589 4590 switch (mode) { 4591 case IEEE80211_MODE_11A: 4592 sc->sc_rates[mode] = ath_hal_getratetable(ah, HAL_MODE_11A); 4593 break; 4594 case IEEE80211_MODE_11B: 4595 sc->sc_rates[mode] = ath_hal_getratetable(ah, HAL_MODE_11B); 4596 break; 4597 case IEEE80211_MODE_11G: 4598 sc->sc_rates[mode] = ath_hal_getratetable(ah, HAL_MODE_11G); 4599 break; 4600 case IEEE80211_MODE_TURBO_A: 4601 sc->sc_rates[mode] = ath_hal_getratetable(ah, HAL_MODE_TURBO); 4602 break; 4603 case IEEE80211_MODE_TURBO_G: 4604 sc->sc_rates[mode] = ath_hal_getratetable(ah, HAL_MODE_108G); 4605 break; 4606 default: 4607 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid mode %u\n", 4608 __func__, mode); 4609 return 0; 4610 } 4611 rt = sc->sc_rates[mode]; 4612 if (rt == NULL) 4613 return 0; 4614 if (rt->rateCount > IEEE80211_RATE_MAXSIZE) { 4615 DPRINTF(sc, ATH_DEBUG_ANY, 4616 "%s: rate table too small (%u > %u)\n", 4617 __func__, rt->rateCount, IEEE80211_RATE_MAXSIZE); 4618 maxrates = IEEE80211_RATE_MAXSIZE; 4619 } else 4620 maxrates = rt->rateCount; 4621 rs = &ic->ic_sup_rates[mode]; 4622 for (i = 0; i < maxrates; i++) 4623 rs->rs_rates[i] = rt->info[i].dot11Rate; 4624 rs->rs_nrates = maxrates; 4625 return 1; 4626 } 4627 4628 static void 4629 ath_setcurmode(struct ath_softc *sc, enum ieee80211_phymode mode) 4630 { 4631 #define N(a) (sizeof(a)/sizeof(a[0])) 4632 /* NB: on/off times from the Atheros NDIS driver, w/ permission */ 4633 static const struct { 4634 u_int rate; /* tx/rx 802.11 rate */ 4635 u_int16_t timeOn; /* LED on time (ms) */ 4636 u_int16_t timeOff; /* LED off time (ms) */ 4637 } blinkrates[] = { 4638 { 108, 40, 10 }, 4639 { 96, 44, 11 }, 4640 { 72, 50, 13 }, 4641 { 48, 57, 14 }, 4642 { 36, 67, 16 }, 4643 { 24, 80, 20 }, 4644 { 22, 100, 25 }, 4645 { 18, 133, 34 }, 4646 { 12, 160, 40 }, 4647 { 10, 200, 50 }, 4648 { 6, 240, 58 }, 4649 { 4, 267, 66 }, 4650 { 2, 400, 100 }, 4651 { 0, 500, 130 }, 4652 }; 4653 const HAL_RATE_TABLE *rt; 4654 int i, j; 4655 4656 memset(sc->sc_rixmap, 0xff, sizeof(sc->sc_rixmap)); 4657 rt = sc->sc_rates[mode]; 4658 KASSERT(rt != NULL, ("no h/w rate set for phy mode %u", mode)); 4659 for (i = 0; i < rt->rateCount; i++) 4660 sc->sc_rixmap[rt->info[i].dot11Rate & IEEE80211_RATE_VAL] = i; 4661 memset(sc->sc_hwmap, 0, sizeof(sc->sc_hwmap)); 4662 for (i = 0; i < 32; i++) { 4663 u_int8_t ix = rt->rateCodeToIndex[i]; 4664 if (ix == 0xff) { 4665 sc->sc_hwmap[i].ledon = (500 * hz) / 1000; 4666 sc->sc_hwmap[i].ledoff = (130 * hz) / 1000; 4667 continue; 4668 } 4669 sc->sc_hwmap[i].ieeerate = 4670 rt->info[ix].dot11Rate & IEEE80211_RATE_VAL; 4671 sc->sc_hwmap[i].txflags = IEEE80211_RADIOTAP_F_DATAPAD; 4672 if (rt->info[ix].shortPreamble || 4673 rt->info[ix].phy == IEEE80211_T_OFDM) 4674 sc->sc_hwmap[i].txflags |= IEEE80211_RADIOTAP_F_SHORTPRE; 4675 /* NB: receive frames include FCS */ 4676 sc->sc_hwmap[i].rxflags = sc->sc_hwmap[i].txflags | 4677 IEEE80211_RADIOTAP_F_FCS; 4678 /* setup blink rate table to avoid per-packet lookup */ 4679 for (j = 0; j < N(blinkrates)-1; j++) 4680 if (blinkrates[j].rate == sc->sc_hwmap[i].ieeerate) 4681 break; 4682 /* NB: this uses the last entry if the rate isn't found */ 4683 /* XXX beware of overlow */ 4684 sc->sc_hwmap[i].ledon = (blinkrates[j].timeOn * hz) / 1000; 4685 sc->sc_hwmap[i].ledoff = (blinkrates[j].timeOff * hz) / 1000; 4686 } 4687 sc->sc_currates = rt; 4688 sc->sc_curmode = mode; 4689 /* 4690 * All protection frames are transmited at 2Mb/s for 4691 * 11g, otherwise at 1Mb/s. 4692 * XXX select protection rate index from rate table. 4693 */ 4694 sc->sc_protrix = (mode == IEEE80211_MODE_11G ? 1 : 0); 4695 /* NB: caller is responsible for reseting rate control state */ 4696 #undef N 4697 } 4698 4699 #ifdef AR_DEBUG 4700 static void 4701 ath_printrxbuf(struct ath_buf *bf, int done) 4702 { 4703 struct ath_desc *ds; 4704 int i; 4705 4706 for (i = 0, ds = bf->bf_desc; i < bf->bf_nseg; i++, ds++) { 4707 printf("R%d (%p %p) %08x %08x %08x %08x %08x %08x %c\n", 4708 i, ds, (struct ath_desc *)bf->bf_daddr + i, 4709 ds->ds_link, ds->ds_data, 4710 ds->ds_ctl0, ds->ds_ctl1, 4711 ds->ds_hw[0], ds->ds_hw[1], 4712 !done ? ' ' : (ds->ds_rxstat.rs_status == 0) ? '*' : '!'); 4713 } 4714 } 4715 4716 static void 4717 ath_printtxbuf(struct ath_buf *bf, int done) 4718 { 4719 struct ath_desc *ds; 4720 int i; 4721 4722 for (i = 0, ds = bf->bf_desc; i < bf->bf_nseg; i++, ds++) { 4723 printf("T%d (%p %p) %08x %08x %08x %08x %08x %08x %08x %08x %c\n", 4724 i, ds, (struct ath_desc *)bf->bf_daddr + i, 4725 ds->ds_link, ds->ds_data, 4726 ds->ds_ctl0, ds->ds_ctl1, 4727 ds->ds_hw[0], ds->ds_hw[1], ds->ds_hw[2], ds->ds_hw[3], 4728 !done ? ' ' : (ds->ds_txstat.ts_status == 0) ? '*' : '!'); 4729 } 4730 } 4731 #endif /* AR_DEBUG */ 4732 4733 static void 4734 ath_watchdog(struct ifnet *ifp) 4735 { 4736 struct ath_softc *sc = ifp->if_softc; 4737 struct ieee80211com *ic = &sc->sc_ic; 4738 4739 ifp->if_timer = 0; 4740 if ((ifp->if_flags & IFF_RUNNING) == 0 || sc->sc_invalid) 4741 return; 4742 if (sc->sc_tx_timer) { 4743 if (--sc->sc_tx_timer == 0) { 4744 if_printf(ifp, "device timeout\n"); 4745 ath_reset(ifp); 4746 ifp->if_oerrors++; 4747 sc->sc_stats.ast_watchdog++; 4748 } else 4749 ifp->if_timer = 1; 4750 } 4751 ieee80211_watchdog(ic); 4752 } 4753 4754 /* 4755 * Diagnostic interface to the HAL. This is used by various 4756 * tools to do things like retrieve register contents for 4757 * debugging. The mechanism is intentionally opaque so that 4758 * it can change frequently w/o concern for compatiblity. 4759 */ 4760 static int 4761 ath_ioctl_diag(struct ath_softc *sc, struct ath_diag *ad) 4762 { 4763 struct ath_hal *ah = sc->sc_ah; 4764 u_int id = ad->ad_id & ATH_DIAG_ID; 4765 void *indata = NULL; 4766 void *outdata = NULL; 4767 u_int32_t insize = ad->ad_in_size; 4768 u_int32_t outsize = ad->ad_out_size; 4769 int error = 0; 4770 4771 if (ad->ad_id & ATH_DIAG_IN) { 4772 /* 4773 * Copy in data. 4774 */ 4775 indata = malloc(insize, M_TEMP, M_NOWAIT); 4776 if (indata == NULL) { 4777 error = ENOMEM; 4778 goto bad; 4779 } 4780 error = copyin(ad->ad_in_data, indata, insize); 4781 if (error) 4782 goto bad; 4783 } 4784 if (ad->ad_id & ATH_DIAG_DYN) { 4785 /* 4786 * Allocate a buffer for the results (otherwise the HAL 4787 * returns a pointer to a buffer where we can read the 4788 * results). Note that we depend on the HAL leaving this 4789 * pointer for us to use below in reclaiming the buffer; 4790 * may want to be more defensive. 4791 */ 4792 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 4793 if (outdata == NULL) { 4794 error = ENOMEM; 4795 goto bad; 4796 } 4797 } 4798 if (ath_hal_getdiagstate(ah, id, indata, insize, &outdata, &outsize)) { 4799 if (outsize < ad->ad_out_size) 4800 ad->ad_out_size = outsize; 4801 if (outdata != NULL) 4802 error = copyout(outdata, ad->ad_out_data, 4803 ad->ad_out_size); 4804 } else { 4805 error = EINVAL; 4806 } 4807 bad: 4808 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 4809 free(indata, M_TEMP); 4810 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 4811 free(outdata, M_TEMP); 4812 return error; 4813 } 4814 4815 static int 4816 ath_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 4817 { 4818 #define IS_RUNNING(ifp) \ 4819 ((ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING)) 4820 struct ath_softc *sc = ifp->if_softc; 4821 struct ieee80211com *ic = &sc->sc_ic; 4822 struct ifreq *ifr = (struct ifreq *)data; 4823 int error = 0; 4824 4825 ATH_LOCK(sc); 4826 switch (cmd) { 4827 case SIOCSIFFLAGS: 4828 if (IS_RUNNING(ifp)) { 4829 /* 4830 * To avoid rescanning another access point, 4831 * do not call ath_init() here. Instead, 4832 * only reflect promisc mode settings. 4833 */ 4834 ath_mode_init(sc); 4835 } else if (ifp->if_flags & IFF_UP) { 4836 /* 4837 * Beware of being called during attach/detach 4838 * to reset promiscuous mode. In that case we 4839 * will still be marked UP but not RUNNING. 4840 * However trying to re-init the interface 4841 * is the wrong thing to do as we've already 4842 * torn down much of our state. There's 4843 * probably a better way to deal with this. 4844 */ 4845 if (!sc->sc_invalid && ic->ic_bss != NULL) 4846 ath_init(sc); /* XXX lose error */ 4847 } else 4848 ath_stop_locked(ifp, 1); 4849 break; 4850 case SIOCADDMULTI: 4851 case SIOCDELMULTI: 4852 error = (cmd == SIOCADDMULTI) ? 4853 ether_addmulti(ifr, &sc->sc_ec) : 4854 ether_delmulti(ifr, &sc->sc_ec); 4855 if (error == ENETRESET) { 4856 if (ifp->if_flags & IFF_RUNNING) 4857 ath_mode_init(sc); 4858 error = 0; 4859 } 4860 break; 4861 case SIOCGATHSTATS: 4862 /* NB: embed these numbers to get a consistent view */ 4863 sc->sc_stats.ast_tx_packets = ifp->if_opackets; 4864 sc->sc_stats.ast_rx_packets = ifp->if_ipackets; 4865 sc->sc_stats.ast_rx_rssi = ieee80211_getrssi(ic); 4866 ATH_UNLOCK(sc); 4867 /* 4868 * NB: Drop the softc lock in case of a page fault; 4869 * we'll accept any potential inconsisentcy in the 4870 * statistics. The alternative is to copy the data 4871 * to a local structure. 4872 */ 4873 return copyout(&sc->sc_stats, 4874 ifr->ifr_data, sizeof (sc->sc_stats)); 4875 case SIOCGATHDIAG: 4876 error = ath_ioctl_diag(sc, (struct ath_diag *) ifr); 4877 break; 4878 default: 4879 error = ieee80211_ioctl(ic, cmd, data); 4880 if (error == ENETRESET) { 4881 if (IS_RUNNING(ifp) && 4882 ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 4883 ath_init(sc); /* XXX lose error */ 4884 error = 0; 4885 } 4886 if (error == ERESTART) 4887 error = IS_RUNNING(ifp) ? ath_reset(ifp) : 0; 4888 break; 4889 } 4890 ATH_UNLOCK(sc); 4891 return error; 4892 #undef IS_RUNNING 4893 } 4894 4895 static void 4896 ath_bpfattach(struct ath_softc *sc) 4897 { 4898 struct ifnet *ifp = &sc->sc_if; 4899 4900 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 4901 sizeof(struct ieee80211_frame) + sizeof(sc->sc_tx_th), 4902 &sc->sc_drvbpf); 4903 /* 4904 * Initialize constant fields. 4905 * XXX make header lengths a multiple of 32-bits so subsequent 4906 * headers are properly aligned; this is a kludge to keep 4907 * certain applications happy. 4908 * 4909 * NB: the channel is setup each time we transition to the 4910 * RUN state to avoid filling it in for each frame. 4911 */ 4912 sc->sc_tx_th_len = roundup(sizeof(sc->sc_tx_th), sizeof(u_int32_t)); 4913 sc->sc_tx_th.wt_ihdr.it_len = htole16(sc->sc_tx_th_len); 4914 sc->sc_tx_th.wt_ihdr.it_present = htole32(ATH_TX_RADIOTAP_PRESENT); 4915 4916 sc->sc_rx_th_len = roundup(sizeof(sc->sc_rx_th), sizeof(u_int32_t)); 4917 sc->sc_rx_th.wr_ihdr.it_len = htole16(sc->sc_rx_th_len); 4918 sc->sc_rx_th.wr_ihdr.it_present = htole32(ATH_RX_RADIOTAP_PRESENT); 4919 } 4920 4921 /* 4922 * Announce various information on device/driver attach. 4923 */ 4924 static void 4925 ath_announce(struct ath_softc *sc) 4926 { 4927 #define HAL_MODE_DUALBAND (HAL_MODE_11A|HAL_MODE_11B) 4928 struct ifnet *ifp = &sc->sc_if; 4929 struct ath_hal *ah = sc->sc_ah; 4930 u_int modes, cc; 4931 4932 if_printf(ifp, "mac %d.%d phy %d.%d", 4933 ah->ah_macVersion, ah->ah_macRev, 4934 ah->ah_phyRev >> 4, ah->ah_phyRev & 0xf); 4935 /* 4936 * Print radio revision(s). We check the wireless modes 4937 * to avoid falsely printing revs for inoperable parts. 4938 * Dual-band radio revs are returned in the 5Ghz rev number. 4939 */ 4940 ath_hal_getcountrycode(ah, &cc); 4941 modes = ath_hal_getwirelessmodes(ah, cc); 4942 if ((modes & HAL_MODE_DUALBAND) == HAL_MODE_DUALBAND) { 4943 if (ah->ah_analog5GhzRev && ah->ah_analog2GhzRev) 4944 printf(" 5ghz radio %d.%d 2ghz radio %d.%d", 4945 ah->ah_analog5GhzRev >> 4, 4946 ah->ah_analog5GhzRev & 0xf, 4947 ah->ah_analog2GhzRev >> 4, 4948 ah->ah_analog2GhzRev & 0xf); 4949 else 4950 printf(" radio %d.%d", ah->ah_analog5GhzRev >> 4, 4951 ah->ah_analog5GhzRev & 0xf); 4952 } else 4953 printf(" radio %d.%d", ah->ah_analog5GhzRev >> 4, 4954 ah->ah_analog5GhzRev & 0xf); 4955 printf("\n"); 4956 if (bootverbose) { 4957 int i; 4958 for (i = 0; i <= WME_AC_VO; i++) { 4959 struct ath_txq *txq = sc->sc_ac2q[i]; 4960 if_printf(ifp, "Use hw queue %u for %s traffic\n", 4961 txq->axq_qnum, ieee80211_wme_acnames[i]); 4962 } 4963 if_printf(ifp, "Use hw queue %u for CAB traffic\n", 4964 sc->sc_cabq->axq_qnum); 4965 if_printf(ifp, "Use hw queue %u for beacons\n", sc->sc_bhalq); 4966 } 4967 #undef HAL_MODE_DUALBAND 4968 } 4969
Indexes created Thu Oct 02 07:10:07 GMT 2025