1 /*- 2 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer, 10 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13 * redistribution must be conditioned upon including a substantially 14 * similar Disclaimer requirement for further binary redistribution. 15 * 16 * NO WARRANTY 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGES. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 /* 34 * Driver for the Atheros Wireless LAN controller. 35 * 36 * This software is derived from work of Atsushi Onoe; his contribution 37 * is greatly appreciated. 38 */ 39 40 #include "opt_inet.h" 41 #include "opt_ath.h" 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/sysctl.h> 46 #include <sys/mbuf.h> 47 #include <sys/malloc.h> 48 #include <sys/lock.h> 49 #include <sys/mutex.h> 50 #include <sys/kernel.h> 51 #include <sys/socket.h> 52 #include <sys/sockio.h> 53 #include <sys/errno.h> 54 #include <sys/callout.h> 55 #include <sys/bus.h> 56 #include <sys/endian.h> 57 #include <sys/kthread.h> 58 #include <sys/taskqueue.h> 59 60 #include <machine/bus.h> 61 62 #include <net/if.h> 63 #include <net/if_dl.h> 64 #include <net/if_media.h> 65 #include <net/if_types.h> 66 #include <net/if_arp.h> 67 #include <net/ethernet.h> 68 #include <net/if_llc.h> 69 70 #include <net80211/ieee80211_var.h> 71 72 #include <net/bpf.h> 73 74 #ifdef INET 75 #include <netinet/in.h> 76 #include <netinet/if_ether.h> 77 #endif 78 79 #include <dev/ath/if_athvar.h> 80 #include <contrib/dev/ath/ah_desc.h> 81 #include <contrib/dev/ath/ah_devid.h> /* XXX for softled */ 82 83 #ifdef ATH_TX99_DIAG 84 #include <dev/ath/ath_tx99/ath_tx99.h> 85 #endif 86 87 /* unaligned little endian access */ 88 #define LE_READ_2(p) \ 89 ((u_int16_t) \ 90 ((((u_int8_t *)(p))[0] ) | (((u_int8_t *)(p))[1] << 8))) 91 #define LE_READ_4(p) \ 92 ((u_int32_t) \ 93 ((((u_int8_t *)(p))[0] ) | (((u_int8_t *)(p))[1] << 8) | \ 94 (((u_int8_t *)(p))[2] << 16) | (((u_int8_t *)(p))[3] << 24))) 95 96 enum { 97 ATH_LED_TX, 98 ATH_LED_RX, 99 ATH_LED_POLL, 100 }; 101 102 static void ath_init(void *); 103 static void ath_stop_locked(struct ifnet *); 104 static void ath_stop(struct ifnet *); 105 static void ath_start(struct ifnet *); 106 static int ath_reset(struct ifnet *); 107 static int ath_media_change(struct ifnet *); 108 static void ath_watchdog(struct ifnet *); 109 static int ath_ioctl(struct ifnet *, u_long, caddr_t); 110 static void ath_fatal_proc(void *, int); 111 static void ath_rxorn_proc(void *, int); 112 static void ath_bmiss_proc(void *, int); 113 static int ath_key_alloc(struct ieee80211com *, 114 const struct ieee80211_key *, 115 ieee80211_keyix *, ieee80211_keyix *); 116 static int ath_key_delete(struct ieee80211com *, 117 const struct ieee80211_key *); 118 static int ath_key_set(struct ieee80211com *, const struct ieee80211_key *, 119 const u_int8_t mac[IEEE80211_ADDR_LEN]); 120 static void ath_key_update_begin(struct ieee80211com *); 121 static void ath_key_update_end(struct ieee80211com *); 122 static void ath_mode_init(struct ath_softc *); 123 static void ath_setslottime(struct ath_softc *); 124 static void ath_updateslot(struct ifnet *); 125 static int ath_beaconq_setup(struct ath_hal *); 126 static int ath_beacon_alloc(struct ath_softc *, struct ieee80211_node *); 127 static void ath_beacon_update(struct ieee80211com *, int item); 128 static void ath_beacon_setup(struct ath_softc *, struct ath_buf *); 129 static void ath_beacon_proc(void *, int); 130 static void ath_bstuck_proc(void *, int); 131 static void ath_beacon_free(struct ath_softc *); 132 static void ath_beacon_config(struct ath_softc *); 133 static void ath_descdma_cleanup(struct ath_softc *sc, 134 struct ath_descdma *, ath_bufhead *); 135 static int ath_desc_alloc(struct ath_softc *); 136 static void ath_desc_free(struct ath_softc *); 137 static struct ieee80211_node *ath_node_alloc(struct ieee80211_node_table *); 138 static void ath_node_free(struct ieee80211_node *); 139 static int8_t ath_node_getrssi(const struct ieee80211_node *); 140 static void ath_node_getsignal(const struct ieee80211_node *, 141 int8_t *, int8_t *); 142 static int ath_rxbuf_init(struct ath_softc *, struct ath_buf *); 143 static void ath_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 144 struct ieee80211_node *ni, 145 int subtype, int rssi, int noise, u_int32_t rstamp); 146 static void ath_setdefantenna(struct ath_softc *, u_int); 147 static void ath_rx_proc(void *, int); 148 static void ath_txq_init(struct ath_softc *sc, struct ath_txq *, int); 149 static struct ath_txq *ath_txq_setup(struct ath_softc*, int qtype, int subtype); 150 static int ath_tx_setup(struct ath_softc *, int, int); 151 static int ath_wme_update(struct ieee80211com *); 152 static void ath_tx_cleanupq(struct ath_softc *, struct ath_txq *); 153 static void ath_tx_cleanup(struct ath_softc *); 154 static void ath_freetx(struct mbuf *); 155 static int ath_tx_start(struct ath_softc *, struct ieee80211_node *, 156 struct ath_buf *, struct mbuf *); 157 static void ath_tx_proc_q0(void *, int); 158 static void ath_tx_proc_q0123(void *, int); 159 static void ath_tx_proc(void *, int); 160 static int ath_chan_set(struct ath_softc *, struct ieee80211_channel *); 161 static void ath_draintxq(struct ath_softc *); 162 static void ath_stoprecv(struct ath_softc *); 163 static int ath_startrecv(struct ath_softc *); 164 static void ath_chan_change(struct ath_softc *, struct ieee80211_channel *); 165 static void ath_scan_start(struct ieee80211com *); 166 static void ath_scan_end(struct ieee80211com *); 167 static void ath_set_channel(struct ieee80211com *); 168 static void ath_calibrate(void *); 169 static int ath_newstate(struct ieee80211com *, enum ieee80211_state, int); 170 static void ath_setup_stationkey(struct ieee80211_node *); 171 static void ath_newassoc(struct ieee80211_node *, int); 172 static int ath_getchannels(struct ath_softc *, 173 HAL_REG_DOMAIN, HAL_CTRY_CODE, HAL_BOOL, HAL_BOOL); 174 static void ath_led_event(struct ath_softc *, int); 175 static void ath_update_txpow(struct ath_softc *); 176 177 static int ath_rate_setup(struct ath_softc *, u_int mode); 178 static void ath_setcurmode(struct ath_softc *, enum ieee80211_phymode); 179 180 static void ath_sysctlattach(struct ath_softc *); 181 static int ath_raw_xmit(struct ieee80211_node *, 182 struct mbuf *, const struct ieee80211_bpf_params *); 183 static void ath_bpfattach(struct ath_softc *); 184 static void ath_announce(struct ath_softc *); 185 186 SYSCTL_DECL(_hw_ath); 187 188 /* XXX validate sysctl values */ 189 static int ath_calinterval = 30; /* calibrate every 30 secs */ 190 SYSCTL_INT(_hw_ath, OID_AUTO, calibrate, CTLFLAG_RW, &ath_calinterval, 191 0, "chip calibration interval (secs)"); 192 static int ath_outdoor = AH_TRUE; /* outdoor operation */ 193 SYSCTL_INT(_hw_ath, OID_AUTO, outdoor, CTLFLAG_RW, &ath_outdoor, 194 0, "outdoor operation"); 195 TUNABLE_INT("hw.ath.outdoor", &ath_outdoor); 196 static int ath_xchanmode = AH_TRUE; /* extended channel use */ 197 SYSCTL_INT(_hw_ath, OID_AUTO, xchanmode, CTLFLAG_RW, &ath_xchanmode, 198 0, "extended channel mode"); 199 TUNABLE_INT("hw.ath.xchanmode", &ath_xchanmode); 200 static int ath_countrycode = CTRY_DEFAULT; /* country code */ 201 SYSCTL_INT(_hw_ath, OID_AUTO, countrycode, CTLFLAG_RW, &ath_countrycode, 202 0, "country code"); 203 TUNABLE_INT("hw.ath.countrycode", &ath_countrycode); 204 static int ath_regdomain = 0; /* regulatory domain */ 205 SYSCTL_INT(_hw_ath, OID_AUTO, regdomain, CTLFLAG_RD, &ath_regdomain, 206 0, "regulatory domain"); 207 208 static int ath_rxbuf = ATH_RXBUF; /* # rx buffers to allocate */ 209 SYSCTL_INT(_hw_ath, OID_AUTO, rxbuf, CTLFLAG_RW, &ath_rxbuf, 210 0, "rx buffers allocated"); 211 TUNABLE_INT("hw.ath.rxbuf", &ath_rxbuf); 212 static int ath_txbuf = ATH_TXBUF; /* # tx buffers to allocate */ 213 SYSCTL_INT(_hw_ath, OID_AUTO, txbuf, CTLFLAG_RW, &ath_txbuf, 214 0, "tx buffers allocated"); 215 TUNABLE_INT("hw.ath.txbuf", &ath_txbuf); 216 217 #ifdef ATH_DEBUG 218 static int ath_debug = 0; 219 SYSCTL_INT(_hw_ath, OID_AUTO, debug, CTLFLAG_RW, &ath_debug, 220 0, "control debugging printfs"); 221 TUNABLE_INT("hw.ath.debug", &ath_debug); 222 enum { 223 ATH_DEBUG_XMIT = 0x00000001, /* basic xmit operation */ 224 ATH_DEBUG_XMIT_DESC = 0x00000002, /* xmit descriptors */ 225 ATH_DEBUG_RECV = 0x00000004, /* basic recv operation */ 226 ATH_DEBUG_RECV_DESC = 0x00000008, /* recv descriptors */ 227 ATH_DEBUG_RATE = 0x00000010, /* rate control */ 228 ATH_DEBUG_RESET = 0x00000020, /* reset processing */ 229 ATH_DEBUG_MODE = 0x00000040, /* mode init/setup */ 230 ATH_DEBUG_BEACON = 0x00000080, /* beacon handling */ 231 ATH_DEBUG_WATCHDOG = 0x00000100, /* watchdog timeout */ 232 ATH_DEBUG_INTR = 0x00001000, /* ISR */ 233 ATH_DEBUG_TX_PROC = 0x00002000, /* tx ISR proc */ 234 ATH_DEBUG_RX_PROC = 0x00004000, /* rx ISR proc */ 235 ATH_DEBUG_BEACON_PROC = 0x00008000, /* beacon ISR proc */ 236 ATH_DEBUG_CALIBRATE = 0x00010000, /* periodic calibration */ 237 ATH_DEBUG_KEYCACHE = 0x00020000, /* key cache management */ 238 ATH_DEBUG_STATE = 0x00040000, /* 802.11 state transitions */ 239 ATH_DEBUG_NODE = 0x00080000, /* node management */ 240 ATH_DEBUG_LED = 0x00100000, /* led management */ 241 ATH_DEBUG_FF = 0x00200000, /* fast frames */ 242 ATH_DEBUG_DFS = 0x00400000, /* DFS processing */ 243 ATH_DEBUG_FATAL = 0x80000000, /* fatal errors */ 244 ATH_DEBUG_ANY = 0xffffffff 245 }; 246 #define IFF_DUMPPKTS(sc, m) \ 247 ((sc->sc_debug & (m)) || \ 248 (sc->sc_ifp->if_flags & (IFF_DEBUG|IFF_LINK2)) == (IFF_DEBUG|IFF_LINK2)) 249 #define DPRINTF(sc, m, fmt, ...) do { \ 250 if (sc->sc_debug & (m)) \ 251 printf(fmt, __VA_ARGS__); \ 252 } while (0) 253 #define KEYPRINTF(sc, ix, hk, mac) do { \ 254 if (sc->sc_debug & ATH_DEBUG_KEYCACHE) \ 255 ath_keyprint(sc, __func__, ix, hk, mac); \ 256 } while (0) 257 static void ath_printrxbuf(const struct ath_buf *bf, u_int ix, int); 258 static void ath_printtxbuf(const struct ath_buf *bf, u_int qnum, u_int ix, int done); 259 #else 260 #define IFF_DUMPPKTS(sc, m) \ 261 ((sc->sc_ifp->if_flags & (IFF_DEBUG|IFF_LINK2)) == (IFF_DEBUG|IFF_LINK2)) 262 #define DPRINTF(sc, m, fmt, ...) do { \ 263 (void) sc; \ 264 } while (0) 265 #define KEYPRINTF(sc, k, ix, mac) do { \ 266 (void) sc; \ 267 } while (0) 268 #endif 269 270 MALLOC_DEFINE(M_ATHDEV, "athdev", "ath driver dma buffers"); 271 272 int 273 ath_attach(u_int16_t devid, struct ath_softc *sc) 274 { 275 struct ifnet *ifp; 276 struct ieee80211com *ic = &sc->sc_ic; 277 struct ath_hal *ah = NULL; 278 HAL_STATUS status; 279 int error = 0, i; 280 281 DPRINTF(sc, ATH_DEBUG_ANY, "%s: devid 0x%x\n", __func__, devid); 282 283 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 284 if (ifp == NULL) { 285 device_printf(sc->sc_dev, "can not if_alloc()\n"); 286 error = ENOSPC; 287 goto bad; 288 } 289 290 /* set these up early for if_printf use */ 291 if_initname(ifp, device_get_name(sc->sc_dev), 292 device_get_unit(sc->sc_dev)); 293 294 ah = ath_hal_attach(devid, sc, sc->sc_st, sc->sc_sh, &status); 295 if (ah == NULL) { 296 if_printf(ifp, "unable to attach hardware; HAL status %u\n", 297 status); 298 error = ENXIO; 299 goto bad; 300 } 301 if (ah->ah_abi != HAL_ABI_VERSION) { 302 if_printf(ifp, "HAL ABI mismatch detected " 303 "(HAL:0x%x != driver:0x%x)\n", 304 ah->ah_abi, HAL_ABI_VERSION); 305 error = ENXIO; 306 goto bad; 307 } 308 sc->sc_ah = ah; 309 sc->sc_invalid = 0; /* ready to go, enable interrupt handling */ 310 311 /* 312 * Check if the MAC has multi-rate retry support. 313 * We do this by trying to setup a fake extended 314 * descriptor. MAC's that don't have support will 315 * return false w/o doing anything. MAC's that do 316 * support it will return true w/o doing anything. 317 */ 318 sc->sc_mrretry = ath_hal_setupxtxdesc(ah, NULL, 0,0, 0,0, 0,0); 319 320 /* 321 * Check if the device has hardware counters for PHY 322 * errors. If so we need to enable the MIB interrupt 323 * so we can act on stat triggers. 324 */ 325 if (ath_hal_hwphycounters(ah)) 326 sc->sc_needmib = 1; 327 328 /* 329 * Get the hardware key cache size. 330 */ 331 sc->sc_keymax = ath_hal_keycachesize(ah); 332 if (sc->sc_keymax > ATH_KEYMAX) { 333 if_printf(ifp, "Warning, using only %u of %u key cache slots\n", 334 ATH_KEYMAX, sc->sc_keymax); 335 sc->sc_keymax = ATH_KEYMAX; 336 } 337 /* 338 * Reset the key cache since some parts do not 339 * reset the contents on initial power up. 340 */ 341 for (i = 0; i < sc->sc_keymax; i++) 342 ath_hal_keyreset(ah, i); 343 344 /* 345 * Collect the channel list using the default country 346 * code and including outdoor channels. The 802.11 layer 347 * is resposible for filtering this list based on settings 348 * like the phy mode. 349 */ 350 error = ath_getchannels(sc, ath_regdomain, ath_countrycode, 351 ath_outdoor != 0, ath_xchanmode != 0); 352 if (error != 0) 353 goto bad; 354 355 /* 356 * Setup rate tables for all potential media types. 357 */ 358 ath_rate_setup(sc, IEEE80211_MODE_11A); 359 ath_rate_setup(sc, IEEE80211_MODE_11B); 360 ath_rate_setup(sc, IEEE80211_MODE_11G); 361 ath_rate_setup(sc, IEEE80211_MODE_TURBO_A); 362 ath_rate_setup(sc, IEEE80211_MODE_TURBO_G); 363 ath_rate_setup(sc, IEEE80211_MODE_STURBO_A); 364 ath_rate_setup(sc, IEEE80211_MODE_11NA); 365 ath_rate_setup(sc, IEEE80211_MODE_11NG); 366 ath_rate_setup(sc, IEEE80211_MODE_HALF); 367 ath_rate_setup(sc, IEEE80211_MODE_QUARTER); 368 369 /* NB: setup here so ath_rate_update is happy */ 370 ath_setcurmode(sc, IEEE80211_MODE_11A); 371 372 /* 373 * Allocate tx+rx descriptors and populate the lists. 374 */ 375 error = ath_desc_alloc(sc); 376 if (error != 0) { 377 if_printf(ifp, "failed to allocate descriptors: %d\n", error); 378 goto bad; 379 } 380 callout_init(&sc->sc_cal_ch, CALLOUT_MPSAFE); 381 callout_init(&sc->sc_dfs_ch, CALLOUT_MPSAFE); 382 383 ATH_TXBUF_LOCK_INIT(sc); 384 385 sc->sc_tq = taskqueue_create("ath_taskq", M_NOWAIT, 386 taskqueue_thread_enqueue, &sc->sc_tq); 387 taskqueue_start_threads(&sc->sc_tq, 1, PI_NET, 388 "%s taskq", ifp->if_xname); 389 390 TASK_INIT(&sc->sc_rxtask, 0, ath_rx_proc, sc); 391 TASK_INIT(&sc->sc_rxorntask, 0, ath_rxorn_proc, sc); 392 TASK_INIT(&sc->sc_bmisstask, 0, ath_bmiss_proc, sc); 393 TASK_INIT(&sc->sc_bstucktask,0, ath_bstuck_proc, sc); 394 395 /* 396 * Allocate hardware transmit queues: one queue for 397 * beacon frames and one data queue for each QoS 398 * priority. Note that the hal handles reseting 399 * these queues at the needed time. 400 * 401 * XXX PS-Poll 402 */ 403 sc->sc_bhalq = ath_beaconq_setup(ah); 404 if (sc->sc_bhalq == (u_int) -1) { 405 if_printf(ifp, "unable to setup a beacon xmit queue!\n"); 406 error = EIO; 407 goto bad2; 408 } 409 sc->sc_cabq = ath_txq_setup(sc, HAL_TX_QUEUE_CAB, 0); 410 if (sc->sc_cabq == NULL) { 411 if_printf(ifp, "unable to setup CAB xmit queue!\n"); 412 error = EIO; 413 goto bad2; 414 } 415 /* NB: s/w q, qnum used only by WITNESS */ 416 ath_txq_init(sc, &sc->sc_mcastq, HAL_NUM_TX_QUEUES+1); 417 /* NB: insure BK queue is the lowest priority h/w queue */ 418 if (!ath_tx_setup(sc, WME_AC_BK, HAL_WME_AC_BK)) { 419 if_printf(ifp, "unable to setup xmit queue for %s traffic!\n", 420 ieee80211_wme_acnames[WME_AC_BK]); 421 error = EIO; 422 goto bad2; 423 } 424 if (!ath_tx_setup(sc, WME_AC_BE, HAL_WME_AC_BE) || 425 !ath_tx_setup(sc, WME_AC_VI, HAL_WME_AC_VI) || 426 !ath_tx_setup(sc, WME_AC_VO, HAL_WME_AC_VO)) { 427 /* 428 * Not enough hardware tx queues to properly do WME; 429 * just punt and assign them all to the same h/w queue. 430 * We could do a better job of this if, for example, 431 * we allocate queues when we switch from station to 432 * AP mode. 433 */ 434 if (sc->sc_ac2q[WME_AC_VI] != NULL) 435 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_VI]); 436 if (sc->sc_ac2q[WME_AC_BE] != NULL) 437 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_BE]); 438 sc->sc_ac2q[WME_AC_BE] = sc->sc_ac2q[WME_AC_BK]; 439 sc->sc_ac2q[WME_AC_VI] = sc->sc_ac2q[WME_AC_BK]; 440 sc->sc_ac2q[WME_AC_VO] = sc->sc_ac2q[WME_AC_BK]; 441 } 442 443 /* 444 * Special case certain configurations. Note the 445 * CAB queue is handled by these specially so don't 446 * include them when checking the txq setup mask. 447 */ 448 switch (sc->sc_txqsetup &~ (1<<sc->sc_cabq->axq_qnum)) { 449 case 0x01: 450 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0, sc); 451 break; 452 case 0x0f: 453 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0123, sc); 454 break; 455 default: 456 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc, sc); 457 break; 458 } 459 460 /* 461 * Setup rate control. Some rate control modules 462 * call back to change the anntena state so expose 463 * the necessary entry points. 464 * XXX maybe belongs in struct ath_ratectrl? 465 */ 466 sc->sc_setdefantenna = ath_setdefantenna; 467 sc->sc_rc = ath_rate_attach(sc); 468 if (sc->sc_rc == NULL) { 469 error = EIO; 470 goto bad2; 471 } 472 473 sc->sc_blinking = 0; 474 sc->sc_ledstate = 1; 475 sc->sc_ledon = 0; /* low true */ 476 sc->sc_ledidle = (2700*hz)/1000; /* 2.7sec */ 477 callout_init(&sc->sc_ledtimer, CALLOUT_MPSAFE); 478 /* 479 * Auto-enable soft led processing for IBM cards and for 480 * 5211 minipci cards. Users can also manually enable/disable 481 * support with a sysctl. 482 */ 483 sc->sc_softled = (devid == AR5212_DEVID_IBM || devid == AR5211_DEVID); 484 if (sc->sc_softled) { 485 ath_hal_gpioCfgOutput(ah, sc->sc_ledpin); 486 ath_hal_gpioset(ah, sc->sc_ledpin, !sc->sc_ledon); 487 } 488 489 ifp->if_softc = sc; 490 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 491 ifp->if_start = ath_start; 492 ifp->if_watchdog = ath_watchdog; 493 ifp->if_ioctl = ath_ioctl; 494 ifp->if_init = ath_init; 495 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 496 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 497 IFQ_SET_READY(&ifp->if_snd); 498 499 ic->ic_ifp = ifp; 500 ic->ic_reset = ath_reset; 501 ic->ic_newassoc = ath_newassoc; 502 ic->ic_updateslot = ath_updateslot; 503 ic->ic_wme.wme_update = ath_wme_update; 504 /* XXX not right but it's not used anywhere important */ 505 ic->ic_phytype = IEEE80211_T_OFDM; 506 ic->ic_opmode = IEEE80211_M_STA; 507 ic->ic_caps = 508 IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ 509 | IEEE80211_C_HOSTAP /* hostap mode */ 510 | IEEE80211_C_MONITOR /* monitor mode */ 511 | IEEE80211_C_AHDEMO /* adhoc demo mode */ 512 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 513 | IEEE80211_C_SHSLOT /* short slot time supported */ 514 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ 515 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 516 | IEEE80211_C_TXFRAG /* handle tx frags */ 517 ; 518 /* 519 * Query the hal to figure out h/w crypto support. 520 */ 521 if (ath_hal_ciphersupported(ah, HAL_CIPHER_WEP)) 522 ic->ic_caps |= IEEE80211_C_WEP; 523 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_OCB)) 524 ic->ic_caps |= IEEE80211_C_AES; 525 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_CCM)) 526 ic->ic_caps |= IEEE80211_C_AES_CCM; 527 if (ath_hal_ciphersupported(ah, HAL_CIPHER_CKIP)) 528 ic->ic_caps |= IEEE80211_C_CKIP; 529 if (ath_hal_ciphersupported(ah, HAL_CIPHER_TKIP)) { 530 ic->ic_caps |= IEEE80211_C_TKIP; 531 /* 532 * Check if h/w does the MIC and/or whether the 533 * separate key cache entries are required to 534 * handle both tx+rx MIC keys. 535 */ 536 if (ath_hal_ciphersupported(ah, HAL_CIPHER_MIC)) 537 ic->ic_caps |= IEEE80211_C_TKIPMIC; 538 /* 539 * If the h/w supports storing tx+rx MIC keys 540 * in one cache slot automatically enable use. 541 */ 542 if (ath_hal_hastkipsplit(ah) || 543 !ath_hal_settkipsplit(ah, AH_FALSE)) 544 sc->sc_splitmic = 1; 545 } 546 sc->sc_hasclrkey = ath_hal_ciphersupported(ah, HAL_CIPHER_CLR); 547 sc->sc_mcastkey = ath_hal_getmcastkeysearch(ah); 548 /* 549 * Mark key cache slots associated with global keys 550 * as in use. If we knew TKIP was not to be used we 551 * could leave the +32, +64, and +32+64 slots free. 552 */ 553 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 554 setbit(sc->sc_keymap, i); 555 setbit(sc->sc_keymap, i+64); 556 if (sc->sc_splitmic) { 557 setbit(sc->sc_keymap, i+32); 558 setbit(sc->sc_keymap, i+32+64); 559 } 560 } 561 /* 562 * TPC support can be done either with a global cap or 563 * per-packet support. The latter is not available on 564 * all parts. We're a bit pedantic here as all parts 565 * support a global cap. 566 */ 567 if (ath_hal_hastpc(ah) || ath_hal_hastxpowlimit(ah)) 568 ic->ic_caps |= IEEE80211_C_TXPMGT; 569 570 /* 571 * Mark WME capability only if we have sufficient 572 * hardware queues to do proper priority scheduling. 573 */ 574 if (sc->sc_ac2q[WME_AC_BE] != sc->sc_ac2q[WME_AC_BK]) 575 ic->ic_caps |= IEEE80211_C_WME; 576 /* 577 * Check for misc other capabilities. 578 */ 579 if (ath_hal_hasbursting(ah)) 580 ic->ic_caps |= IEEE80211_C_BURST; 581 if (ath_hal_hasfastframes(ah)) 582 ic->ic_caps |= IEEE80211_C_FF; 583 if (ath_hal_getwirelessmodes(ah, ath_countrycode) & (HAL_MODE_108G|HAL_MODE_TURBO)) 584 ic->ic_caps |= IEEE80211_C_TURBOP; 585 586 /* 587 * Indicate we need the 802.11 header padded to a 588 * 32-bit boundary for 4-address and QoS frames. 589 */ 590 ic->ic_flags |= IEEE80211_F_DATAPAD; 591 592 /* 593 * Query the hal about antenna support. 594 */ 595 sc->sc_defant = ath_hal_getdefantenna(ah); 596 597 /* 598 * Not all chips have the VEOL support we want to 599 * use with IBSS beacons; check here for it. 600 */ 601 sc->sc_hasveol = ath_hal_hasveol(ah); 602 603 /* get mac address from hardware */ 604 ath_hal_getmac(ah, ic->ic_myaddr); 605 606 /* call MI attach routine. */ 607 ieee80211_ifattach(ic); 608 sc->sc_opmode = ic->ic_opmode; 609 /* override default methods */ 610 ic->ic_node_alloc = ath_node_alloc; 611 sc->sc_node_free = ic->ic_node_free; 612 ic->ic_node_free = ath_node_free; 613 ic->ic_node_getrssi = ath_node_getrssi; 614 ic->ic_node_getsignal = ath_node_getsignal; 615 sc->sc_recv_mgmt = ic->ic_recv_mgmt; 616 ic->ic_recv_mgmt = ath_recv_mgmt; 617 sc->sc_newstate = ic->ic_newstate; 618 ic->ic_newstate = ath_newstate; 619 ic->ic_scan_start = ath_scan_start; 620 ic->ic_scan_end = ath_scan_end; 621 ic->ic_set_channel = ath_set_channel; 622 ic->ic_crypto.cs_max_keyix = sc->sc_keymax; 623 ic->ic_crypto.cs_key_alloc = ath_key_alloc; 624 ic->ic_crypto.cs_key_delete = ath_key_delete; 625 ic->ic_crypto.cs_key_set = ath_key_set; 626 ic->ic_crypto.cs_key_update_begin = ath_key_update_begin; 627 ic->ic_crypto.cs_key_update_end = ath_key_update_end; 628 ic->ic_raw_xmit = ath_raw_xmit; 629 ic->ic_update_beacon = ath_beacon_update; 630 /* complete initialization */ 631 ieee80211_media_init(ic, ath_media_change, ieee80211_media_status); 632 633 ath_bpfattach(sc); 634 /* 635 * Setup dynamic sysctl's now that country code and 636 * regdomain are available from the hal. 637 */ 638 ath_sysctlattach(sc); 639 640 if (bootverbose) 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 if (ifp != NULL) 651 if_free(ifp); 652 sc->sc_invalid = 1; 653 return error; 654 } 655 656 int 657 ath_detach(struct ath_softc *sc) 658 { 659 struct ifnet *ifp = sc->sc_ifp; 660 661 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 662 __func__, ifp->if_flags); 663 664 ath_stop(ifp); 665 bpfdetach(ifp); 666 /* 667 * NB: the order of these is important: 668 * o call the 802.11 layer before detaching the hal to 669 * insure callbacks into the driver to delete global 670 * key cache entries can be handled 671 * o reclaim the tx queue data structures after calling 672 * the 802.11 layer as we'll get called back to reclaim 673 * node state and potentially want to use them 674 * o to cleanup the tx queues the hal is called, so detach 675 * it last 676 * Other than that, it's straightforward... 677 */ 678 ieee80211_ifdetach(&sc->sc_ic); 679 #ifdef ATH_TX99_DIAG 680 if (sc->sc_tx99 != NULL) 681 sc->sc_tx99->detach(sc->sc_tx99); 682 #endif 683 taskqueue_free(sc->sc_tq); 684 ath_rate_detach(sc->sc_rc); 685 ath_desc_free(sc); 686 ath_tx_cleanup(sc); 687 ath_hal_detach(sc->sc_ah); 688 if_free(ifp); 689 690 return 0; 691 } 692 693 void 694 ath_suspend(struct ath_softc *sc) 695 { 696 struct ifnet *ifp = sc->sc_ifp; 697 698 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 699 __func__, ifp->if_flags); 700 701 ath_stop(ifp); 702 } 703 704 void 705 ath_resume(struct ath_softc *sc) 706 { 707 struct ifnet *ifp = sc->sc_ifp; 708 709 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 710 __func__, ifp->if_flags); 711 712 if (ifp->if_flags & IFF_UP) { 713 ath_init(sc); 714 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 715 ath_start(ifp); 716 } 717 if (sc->sc_softled) { 718 ath_hal_gpioCfgOutput(sc->sc_ah, sc->sc_ledpin); 719 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, !sc->sc_ledon); 720 } 721 } 722 723 void 724 ath_shutdown(struct ath_softc *sc) 725 { 726 struct ifnet *ifp = sc->sc_ifp; 727 728 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 729 __func__, ifp->if_flags); 730 731 ath_stop(ifp); 732 } 733 734 /* 735 * Interrupt handler. Most of the actual processing is deferred. 736 */ 737 void 738 ath_intr(void *arg) 739 { 740 struct ath_softc *sc = arg; 741 struct ifnet *ifp = sc->sc_ifp; 742 struct ath_hal *ah = sc->sc_ah; 743 HAL_INT status; 744 745 if (sc->sc_invalid) { 746 /* 747 * The hardware is not ready/present, don't touch anything. 748 * Note this can happen early on if the IRQ is shared. 749 */ 750 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid; ignored\n", __func__); 751 return; 752 } 753 if (!ath_hal_intrpend(ah)) /* shared irq, not for us */ 754 return; 755 if ((ifp->if_flags & IFF_UP) == 0 || 756 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 757 HAL_INT status; 758 759 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 760 __func__, ifp->if_flags); 761 ath_hal_getisr(ah, &status); /* clear ISR */ 762 ath_hal_intrset(ah, 0); /* disable further intr's */ 763 return; 764 } 765 /* 766 * Figure out the reason(s) for the interrupt. Note 767 * that the hal returns a pseudo-ISR that may include 768 * bits we haven't explicitly enabled so we mask the 769 * value to insure we only process bits we requested. 770 */ 771 ath_hal_getisr(ah, &status); /* NB: clears ISR too */ 772 DPRINTF(sc, ATH_DEBUG_INTR, "%s: status 0x%x\n", __func__, status); 773 status &= sc->sc_imask; /* discard unasked for bits */ 774 if (status & HAL_INT_FATAL) { 775 sc->sc_stats.ast_hardware++; 776 ath_hal_intrset(ah, 0); /* disable intr's until reset */ 777 ath_fatal_proc(sc, 0); 778 } else if (status & HAL_INT_RXORN) { 779 sc->sc_stats.ast_rxorn++; 780 ath_hal_intrset(ah, 0); /* disable intr's until reset */ 781 taskqueue_enqueue(sc->sc_tq, &sc->sc_rxorntask); 782 } else { 783 if (status & HAL_INT_SWBA) { 784 /* 785 * Software beacon alert--time to send a beacon. 786 * Handle beacon transmission directly; deferring 787 * this is too slow to meet timing constraints 788 * under load. 789 */ 790 ath_beacon_proc(sc, 0); 791 } 792 if (status & HAL_INT_RXEOL) { 793 /* 794 * NB: the hardware should re-read the link when 795 * RXE bit is written, but it doesn't work at 796 * least on older hardware revs. 797 */ 798 sc->sc_stats.ast_rxeol++; 799 sc->sc_rxlink = NULL; 800 } 801 if (status & HAL_INT_TXURN) { 802 sc->sc_stats.ast_txurn++; 803 /* bump tx trigger level */ 804 ath_hal_updatetxtriglevel(ah, AH_TRUE); 805 } 806 if (status & HAL_INT_RX) 807 taskqueue_enqueue(sc->sc_tq, &sc->sc_rxtask); 808 if (status & HAL_INT_TX) 809 taskqueue_enqueue(sc->sc_tq, &sc->sc_txtask); 810 if (status & HAL_INT_BMISS) { 811 sc->sc_stats.ast_bmiss++; 812 taskqueue_enqueue(sc->sc_tq, &sc->sc_bmisstask); 813 } 814 if (status & HAL_INT_MIB) { 815 sc->sc_stats.ast_mib++; 816 /* 817 * Disable interrupts until we service the MIB 818 * interrupt; otherwise it will continue to fire. 819 */ 820 ath_hal_intrset(ah, 0); 821 /* 822 * Let the hal handle the event. We assume it will 823 * clear whatever condition caused the interrupt. 824 */ 825 ath_hal_mibevent(ah, &sc->sc_halstats); 826 ath_hal_intrset(ah, sc->sc_imask); 827 } 828 } 829 } 830 831 static void 832 ath_fatal_proc(void *arg, int pending) 833 { 834 struct ath_softc *sc = arg; 835 struct ifnet *ifp = sc->sc_ifp; 836 u_int32_t *state; 837 u_int32_t len; 838 void *sp; 839 840 if_printf(ifp, "hardware error; resetting\n"); 841 /* 842 * Fatal errors are unrecoverable. Typically these 843 * are caused by DMA errors. Collect h/w state from 844 * the hal so we can diagnose what's going on. 845 */ 846 if (ath_hal_getfatalstate(sc->sc_ah, &sp, &len)) { 847 KASSERT(len >= 6*sizeof(u_int32_t), ("len %u bytes", len)); 848 state = sp; 849 if_printf(ifp, "0x%08x 0x%08x 0x%08x, 0x%08x 0x%08x 0x%08x\n", 850 state[0], state[1] , state[2], state[3], 851 state[4], state[5]); 852 } 853 ath_reset(ifp); 854 } 855 856 static void 857 ath_rxorn_proc(void *arg, int pending) 858 { 859 struct ath_softc *sc = arg; 860 struct ifnet *ifp = sc->sc_ifp; 861 862 if_printf(ifp, "rx FIFO overrun; resetting\n"); 863 ath_reset(ifp); 864 } 865 866 static void 867 ath_bmiss_proc(void *arg, int pending) 868 { 869 struct ath_softc *sc = arg; 870 struct ieee80211com *ic = &sc->sc_ic; 871 872 DPRINTF(sc, ATH_DEBUG_ANY, "%s: pending %u\n", __func__, pending); 873 KASSERT(ic->ic_opmode == IEEE80211_M_STA, 874 ("unexpect operating mode %u", ic->ic_opmode)); 875 if (ic->ic_state == IEEE80211_S_RUN) { 876 u_int64_t lastrx = sc->sc_lastrx; 877 u_int64_t tsf = ath_hal_gettsf64(sc->sc_ah); 878 u_int bmisstimeout = 879 ic->ic_bmissthreshold * ic->ic_bss->ni_intval * 1024; 880 881 DPRINTF(sc, ATH_DEBUG_BEACON, 882 "%s: tsf %llu lastrx %lld (%llu) bmiss %u\n", 883 __func__, (unsigned long long) tsf, 884 (unsigned long long)(tsf - lastrx), 885 (unsigned long long) lastrx, bmisstimeout); 886 /* 887 * Workaround phantom bmiss interrupts by sanity-checking 888 * the time of our last rx'd frame. If it is within the 889 * beacon miss interval then ignore the interrupt. If it's 890 * truly a bmiss we'll get another interrupt soon and that'll 891 * be dispatched up for processing. 892 */ 893 if (tsf - lastrx > bmisstimeout) 894 ieee80211_beacon_miss(ic); 895 else 896 sc->sc_stats.ast_bmiss_phantom++; 897 } 898 } 899 900 /* 901 * Convert net80211 channel to a HAL channel with the flags 902 * constrained to reflect the current operating mode and 903 * the frequency possibly mapped for GSM channels. 904 */ 905 static void 906 ath_mapchan(HAL_CHANNEL *hc, const struct ieee80211_channel *chan) 907 { 908 #define N(a) (sizeof(a) / sizeof(a[0])) 909 static const u_int modeflags[IEEE80211_MODE_MAX] = { 910 0, /* IEEE80211_MODE_AUTO */ 911 CHANNEL_A, /* IEEE80211_MODE_11A */ 912 CHANNEL_B, /* IEEE80211_MODE_11B */ 913 CHANNEL_PUREG, /* IEEE80211_MODE_11G */ 914 0, /* IEEE80211_MODE_FH */ 915 CHANNEL_108A, /* IEEE80211_MODE_TURBO_A */ 916 CHANNEL_108G, /* IEEE80211_MODE_TURBO_G */ 917 CHANNEL_ST, /* IEEE80211_MODE_STURBO_A */ 918 CHANNEL_A, /* IEEE80211_MODE_11NA */ 919 CHANNEL_PUREG, /* IEEE80211_MODE_11NG */ 920 }; 921 enum ieee80211_phymode mode = ieee80211_chan2mode(chan); 922 923 KASSERT(mode < N(modeflags), ("unexpected phy mode %u", mode)); 924 KASSERT(modeflags[mode] != 0, ("mode %u undefined", mode)); 925 hc->channelFlags = modeflags[mode]; 926 if (IEEE80211_IS_CHAN_HALF(chan)) 927 hc->channelFlags |= CHANNEL_HALF; 928 if (IEEE80211_IS_CHAN_QUARTER(chan)) 929 hc->channelFlags |= CHANNEL_QUARTER; 930 if (IEEE80211_IS_CHAN_HT20(chan)) 931 hc->channelFlags |= CHANNEL_HT20; 932 if (IEEE80211_IS_CHAN_HT40D(chan)) 933 hc->channelFlags |= CHANNEL_HT40MINUS; 934 if (IEEE80211_IS_CHAN_HT40U(chan)) 935 hc->channelFlags |= CHANNEL_HT40PLUS; 936 937 hc->channel = IEEE80211_IS_CHAN_GSM(chan) ? 938 2422 + (922 - chan->ic_freq) : chan->ic_freq; 939 #undef N 940 } 941 942 static void 943 ath_init(void *arg) 944 { 945 struct ath_softc *sc = (struct ath_softc *) arg; 946 struct ieee80211com *ic = &sc->sc_ic; 947 struct ifnet *ifp = sc->sc_ifp; 948 struct ath_hal *ah = sc->sc_ah; 949 HAL_STATUS status; 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 * Stop anything previously setup. This is safe 957 * whether this is the first time through or not. 958 */ 959 ath_stop_locked(ifp); 960 961 /* 962 * The basic interface to setting the hardware in a good 963 * state is ``reset''. On return the hardware is known to 964 * be powered up and with interrupts disabled. This must 965 * be followed by initialization of the appropriate bits 966 * and then setup of the interrupt mask. 967 */ 968 ath_mapchan(&sc->sc_curchan, ic->ic_curchan); 969 if (!ath_hal_reset(ah, sc->sc_opmode, &sc->sc_curchan, AH_FALSE, &status)) { 970 if_printf(ifp, "unable to reset hardware; hal status %u\n", 971 status); 972 goto done; 973 } 974 975 /* 976 * This is needed only to setup initial state 977 * but it's best done after a reset. 978 */ 979 ath_update_txpow(sc); 980 /* 981 * Likewise this is set during reset so update 982 * state cached in the driver. 983 */ 984 sc->sc_diversity = ath_hal_getdiversity(ah); 985 sc->sc_calinterval = 1; 986 sc->sc_caltries = 0; 987 988 /* 989 * Setup the hardware after reset: the key cache 990 * is filled as needed and the receive engine is 991 * set going. Frame transmit is handled entirely 992 * in the frame output path; there's nothing to do 993 * here except setup the interrupt mask. 994 */ 995 if (ath_startrecv(sc) != 0) { 996 if_printf(ifp, "unable to start recv logic\n"); 997 goto done; 998 } 999 1000 /* 1001 * Enable interrupts. 1002 */ 1003 sc->sc_imask = HAL_INT_RX | HAL_INT_TX 1004 | HAL_INT_RXEOL | HAL_INT_RXORN 1005 | HAL_INT_FATAL | HAL_INT_GLOBAL; 1006 /* 1007 * Enable MIB interrupts when there are hardware phy counters. 1008 * Note we only do this (at the moment) for station mode. 1009 */ 1010 if (sc->sc_needmib && ic->ic_opmode == IEEE80211_M_STA) 1011 sc->sc_imask |= HAL_INT_MIB; 1012 ath_hal_intrset(ah, sc->sc_imask); 1013 1014 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1015 ic->ic_state = IEEE80211_S_INIT; 1016 1017 /* 1018 * The hardware should be ready to go now so it's safe 1019 * to kick the 802.11 state machine as it's likely to 1020 * immediately call back to us to send mgmt frames. 1021 */ 1022 ath_chan_change(sc, ic->ic_curchan); 1023 #ifdef ATH_TX99_DIAG 1024 if (sc->sc_tx99 != NULL) 1025 sc->sc_tx99->start(sc->sc_tx99); 1026 else 1027 #endif 1028 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 1029 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 1030 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 1031 } else 1032 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 1033 done: 1034 ATH_UNLOCK(sc); 1035 } 1036 1037 static void 1038 ath_stop_locked(struct ifnet *ifp) 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_drv_flags & IFF_DRV_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 #ifdef ATH_TX99_DIAG 1065 if (sc->sc_tx99 != NULL) 1066 sc->sc_tx99->stop(sc->sc_tx99); 1067 #endif 1068 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 1069 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1070 ifp->if_timer = 0; 1071 if (!sc->sc_invalid) { 1072 if (sc->sc_softled) { 1073 callout_stop(&sc->sc_ledtimer); 1074 ath_hal_gpioset(ah, sc->sc_ledpin, 1075 !sc->sc_ledon); 1076 sc->sc_blinking = 0; 1077 } 1078 ath_hal_intrset(ah, 0); 1079 } 1080 ath_draintxq(sc); 1081 if (!sc->sc_invalid) { 1082 ath_stoprecv(sc); 1083 ath_hal_phydisable(ah); 1084 } else 1085 sc->sc_rxlink = NULL; 1086 IFQ_DRV_PURGE(&ifp->if_snd); 1087 ath_beacon_free(sc); 1088 } 1089 } 1090 1091 static void 1092 ath_stop(struct ifnet *ifp) 1093 { 1094 struct ath_softc *sc = ifp->if_softc; 1095 1096 ATH_LOCK(sc); 1097 ath_stop_locked(ifp); 1098 if (!sc->sc_invalid) { 1099 /* 1100 * Set the chip in full sleep mode. Note that we are 1101 * careful to do this only when bringing the interface 1102 * completely to a stop. When the chip is in this state 1103 * it must be carefully woken up or references to 1104 * registers in the PCI clock domain may freeze the bus 1105 * (and system). This varies by chip and is mostly an 1106 * issue with newer parts that go to sleep more quickly. 1107 */ 1108 ath_hal_setpower(sc->sc_ah, HAL_PM_FULL_SLEEP); 1109 } 1110 ATH_UNLOCK(sc); 1111 } 1112 1113 /* 1114 * Reset the hardware w/o losing operational state. This is 1115 * basically a more efficient way of doing ath_stop, ath_init, 1116 * followed by state transitions to the current 802.11 1117 * operational state. Used to recover from various errors and 1118 * to reset or reload hardware state. 1119 */ 1120 static int 1121 ath_reset(struct ifnet *ifp) 1122 { 1123 struct ath_softc *sc = ifp->if_softc; 1124 struct ieee80211com *ic = &sc->sc_ic; 1125 struct ath_hal *ah = sc->sc_ah; 1126 HAL_STATUS status; 1127 1128 /* 1129 * Convert to a HAL channel description with the flags 1130 * constrained to reflect the current operating mode. 1131 */ 1132 ath_mapchan(&sc->sc_curchan, ic->ic_curchan); 1133 1134 ath_hal_intrset(ah, 0); /* disable interrupts */ 1135 ath_draintxq(sc); /* stop xmit side */ 1136 ath_stoprecv(sc); /* stop recv side */ 1137 /* NB: indicate channel change so we do a full reset */ 1138 if (!ath_hal_reset(ah, sc->sc_opmode, &sc->sc_curchan, AH_TRUE, &status)) 1139 if_printf(ifp, "%s: unable to reset hardware; hal status %u\n", 1140 __func__, status); 1141 ath_update_txpow(sc); /* update tx power state */ 1142 sc->sc_diversity = ath_hal_getdiversity(ah); 1143 sc->sc_calinterval = 1; 1144 sc->sc_caltries = 0; 1145 if (ath_startrecv(sc) != 0) /* restart recv */ 1146 if_printf(ifp, "%s: unable to start recv logic\n", __func__); 1147 /* 1148 * We may be doing a reset in response to an ioctl 1149 * that changes the channel so update any state that 1150 * might change as a result. 1151 */ 1152 ath_chan_change(sc, ic->ic_curchan); 1153 if (ic->ic_state == IEEE80211_S_RUN) 1154 ath_beacon_config(sc); /* restart beacons */ 1155 ath_hal_intrset(ah, sc->sc_imask); 1156 1157 ath_start(ifp); /* restart xmit */ 1158 return 0; 1159 } 1160 1161 static int 1162 ath_ff_always(struct ath_txq *txq, struct ath_buf *bf) 1163 { 1164 return 0; 1165 } 1166 1167 #if 0 1168 static int 1169 ath_ff_ageflushtestdone(struct ath_txq *txq, struct ath_buf *bf) 1170 { 1171 return (txq->axq_curage - bf->bf_age) < ATH_FF_STAGEMAX; 1172 } 1173 #endif 1174 1175 /* 1176 * Flush FF staging queue. 1177 */ 1178 static void 1179 ath_ff_stageq_flush(struct ath_softc *sc, struct ath_txq *txq, 1180 int (*ath_ff_flushdonetest)(struct ath_txq *txq, struct ath_buf *bf)) 1181 { 1182 struct ath_buf *bf; 1183 struct ieee80211_node *ni; 1184 int pktlen, pri; 1185 1186 for (;;) { 1187 ATH_TXQ_LOCK(txq); 1188 /* 1189 * Go from the back (oldest) to front so we can 1190 * stop early based on the age of the entry. 1191 */ 1192 bf = TAILQ_LAST(&txq->axq_stageq, axq_headtype); 1193 if (bf == NULL || ath_ff_flushdonetest(txq, bf)) { 1194 ATH_TXQ_UNLOCK(txq); 1195 break; 1196 } 1197 1198 ni = bf->bf_node; 1199 pri = M_WME_GETAC(bf->bf_m); 1200 KASSERT(ATH_NODE(ni)->an_ff_buf[pri], 1201 ("no bf on staging queue %p", bf)); 1202 ATH_NODE(ni)->an_ff_buf[pri] = NULL; 1203 TAILQ_REMOVE(&txq->axq_stageq, bf, bf_stagelist); 1204 1205 ATH_TXQ_UNLOCK(txq); 1206 1207 DPRINTF(sc, ATH_DEBUG_FF, "%s: flush frame, age %u\n", 1208 __func__, bf->bf_age); 1209 1210 sc->sc_stats.ast_ff_flush++; 1211 1212 /* encap and xmit */ 1213 bf->bf_m = ieee80211_encap(&sc->sc_ic, bf->bf_m, ni); 1214 if (bf->bf_m == NULL) { 1215 DPRINTF(sc, ATH_DEBUG_XMIT | ATH_DEBUG_FF, 1216 "%s: discard, encapsulation failure\n", 1217 __func__); 1218 sc->sc_stats.ast_tx_encap++; 1219 goto bad; 1220 } 1221 pktlen = bf->bf_m->m_pkthdr.len; /* NB: don't reference below */ 1222 if (ath_tx_start(sc, ni, bf, bf->bf_m) == 0) { 1223 #if 0 /*XXX*/ 1224 ifp->if_opackets++; 1225 #endif 1226 continue; 1227 } 1228 bad: 1229 if (ni != NULL) 1230 ieee80211_free_node(ni); 1231 bf->bf_node = NULL; 1232 if (bf->bf_m != NULL) { 1233 m_freem(bf->bf_m); 1234 bf->bf_m = NULL; 1235 } 1236 1237 ATH_TXBUF_LOCK(sc); 1238 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1239 ATH_TXBUF_UNLOCK(sc); 1240 } 1241 } 1242 1243 static __inline u_int32_t 1244 ath_ff_approx_txtime(struct ath_softc *sc, struct ath_node *an, struct mbuf *m) 1245 { 1246 u_int32_t framelen; 1247 struct ath_buf *bf; 1248 1249 /* 1250 * Approximate the frame length to be transmitted. A swag to add 1251 * the following maximal values to the skb payload: 1252 * - 32: 802.11 encap + CRC 1253 * - 24: encryption overhead (if wep bit) 1254 * - 4 + 6: fast-frame header and padding 1255 * - 16: 2 LLC FF tunnel headers 1256 * - 14: 1 802.3 FF tunnel header (skb already accounts for 2nd) 1257 */ 1258 framelen = m->m_pkthdr.len + 32 + 4 + 6 + 16 + 14; 1259 if (sc->sc_ic.ic_flags & IEEE80211_F_PRIVACY) 1260 framelen += 24; 1261 bf = an->an_ff_buf[M_WME_GETAC(m)]; 1262 if (bf != NULL) 1263 framelen += bf->bf_m->m_pkthdr.len; 1264 return ath_hal_computetxtime(sc->sc_ah, sc->sc_currates, framelen, 1265 sc->sc_lastdatarix, AH_FALSE); 1266 } 1267 1268 /* 1269 * Determine if a data frame may be aggregated via ff tunnelling. 1270 * Note the caller is responsible for checking if the destination 1271 * supports fast frames. 1272 * 1273 * NB: allowing EAPOL frames to be aggregated with other unicast traffic. 1274 * Do 802.1x EAPOL frames proceed in the clear? Then they couldn't 1275 * be aggregated with other types of frames when encryption is on? 1276 * 1277 * NB: assumes lock on an_ff_buf effectively held by txq lock mechanism. 1278 */ 1279 static __inline int 1280 ath_ff_can_aggregate(struct ath_softc *sc, 1281 struct ath_node *an, struct mbuf *m, int *flushq) 1282 { 1283 struct ieee80211com *ic = &sc->sc_ic; 1284 struct ath_txq *txq; 1285 u_int32_t txoplimit; 1286 u_int pri; 1287 1288 *flushq = 0; 1289 1290 /* 1291 * If there is no frame to combine with and the txq has 1292 * fewer frames than the minimum required; then do not 1293 * attempt to aggregate this frame. 1294 */ 1295 pri = M_WME_GETAC(m); 1296 txq = sc->sc_ac2q[pri]; 1297 if (an->an_ff_buf[pri] == NULL && txq->axq_depth < sc->sc_fftxqmin) 1298 return 0; 1299 /* 1300 * When not in station mode never aggregate a multicast 1301 * frame; this insures, for example, that a combined frame 1302 * does not require multiple encryption keys when using 1303 * 802.1x/WPA. 1304 */ 1305 if (ic->ic_opmode != IEEE80211_M_STA && 1306 ETHER_IS_MULTICAST(mtod(m, struct ether_header *)->ether_dhost)) 1307 return 0; 1308 /* 1309 * Consult the max bursting interval to insure a combined 1310 * frame fits within the TxOp window. 1311 */ 1312 txoplimit = IEEE80211_TXOP_TO_US( 1313 ic->ic_wme.wme_chanParams.cap_wmeParams[pri].wmep_txopLimit); 1314 if (txoplimit != 0 && ath_ff_approx_txtime(sc, an, m) > txoplimit) { 1315 DPRINTF(sc, ATH_DEBUG_XMIT | ATH_DEBUG_FF, 1316 "%s: FF TxOp violation\n", __func__); 1317 if (an->an_ff_buf[pri] != NULL) 1318 *flushq = 1; 1319 return 0; 1320 } 1321 return 1; /* try to aggregate */ 1322 } 1323 1324 /* 1325 * Check if the supplied frame can be partnered with an existing 1326 * or pending frame. Return a reference to any frame that should be 1327 * sent on return; otherwise return NULL. 1328 */ 1329 static struct mbuf * 1330 ath_ff_check(struct ath_softc *sc, struct ath_txq *txq, 1331 struct ath_buf *bf, struct mbuf *m, struct ieee80211_node *ni) 1332 { 1333 struct ieee80211com *ic = ni->ni_ic; 1334 struct ath_node *an = ATH_NODE(ni); 1335 struct ath_buf *bfstaged; 1336 int ff_flush, pri; 1337 1338 /* 1339 * Check if the supplied frame can be aggregated. 1340 * 1341 * NB: we use the txq lock to protect references to 1342 * an->an_ff_txbuf in ath_ff_can_aggregate(). 1343 */ 1344 ATH_TXQ_LOCK(txq); 1345 pri = M_WME_GETAC(m); 1346 if (ath_ff_can_aggregate(sc, an, m, &ff_flush)) { 1347 struct ath_buf *bfstaged = an->an_ff_buf[pri]; 1348 if (bfstaged != NULL) { 1349 /* 1350 * A frame is available for partnering; remove 1351 * it, chain it to this one, and encapsulate. 1352 */ 1353 an->an_ff_buf[pri] = NULL; 1354 TAILQ_REMOVE(&txq->axq_stageq, bfstaged, bf_stagelist); 1355 ATH_TXQ_UNLOCK(txq); 1356 1357 /* 1358 * Chain mbufs and add FF magic. 1359 */ 1360 DPRINTF(sc, ATH_DEBUG_FF, 1361 "[%s] aggregate fast-frame, age %u\n", 1362 ether_sprintf(ni->ni_macaddr), txq->axq_curage); 1363 m->m_nextpkt = NULL; 1364 bfstaged->bf_m->m_nextpkt = m; 1365 m = bfstaged->bf_m; 1366 bfstaged->bf_m = NULL; 1367 m->m_flags |= M_FF; 1368 /* 1369 * Release the node reference held while 1370 * the packet sat on an_ff_buf[] 1371 */ 1372 bfstaged->bf_node = NULL; 1373 ieee80211_free_node(ni); 1374 1375 /* 1376 * Return bfstaged to the free list. 1377 */ 1378 ATH_TXBUF_LOCK(sc); 1379 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bfstaged, bf_list); 1380 ATH_TXBUF_UNLOCK(sc); 1381 1382 return m; /* ready to go */ 1383 } else { 1384 /* 1385 * No frame available, queue this frame to wait 1386 * for a partner. Note that we hold the buffer 1387 * and a reference to the node; we need the 1388 * buffer in particular so we're certain we 1389 * can flush the frame at a later time. 1390 */ 1391 DPRINTF(sc, ATH_DEBUG_FF, 1392 "[%s] stage fast-frame, age %u\n", 1393 ether_sprintf(ni->ni_macaddr), txq->axq_curage); 1394 1395 bf->bf_m = m; 1396 bf->bf_node = ni; /* NB: held reference */ 1397 bf->bf_age = txq->axq_curage; 1398 an->an_ff_buf[pri] = bf; 1399 TAILQ_INSERT_HEAD(&txq->axq_stageq, bf, bf_stagelist); 1400 ATH_TXQ_UNLOCK(txq); 1401 1402 return NULL; /* consumed */ 1403 } 1404 } 1405 /* 1406 * Frame could not be aggregated, it needs to be returned 1407 * to the caller for immediate transmission. In addition 1408 * we check if we should first flush a frame from the 1409 * staging queue before sending this one. 1410 * 1411 * NB: ath_ff_can_aggregate only marks ff_flush if a frame 1412 * is present to flush. 1413 */ 1414 if (ff_flush) { 1415 int pktlen; 1416 1417 bfstaged = an->an_ff_buf[pri]; 1418 an->an_ff_buf[pri] = NULL; 1419 TAILQ_REMOVE(&txq->axq_stageq, bfstaged, bf_stagelist); 1420 ATH_TXQ_UNLOCK(txq); 1421 1422 DPRINTF(sc, ATH_DEBUG_FF, "[%s] flush staged frame\n", 1423 ether_sprintf(an->an_node.ni_macaddr)); 1424 1425 /* encap and xmit */ 1426 bfstaged->bf_m = ieee80211_encap(ic, bfstaged->bf_m, ni); 1427 if (bfstaged->bf_m == NULL) { 1428 DPRINTF(sc, ATH_DEBUG_XMIT | ATH_DEBUG_FF, 1429 "%s: discard, encap failure\n", __func__); 1430 sc->sc_stats.ast_tx_encap++; 1431 goto ff_flushbad; 1432 } 1433 pktlen = bfstaged->bf_m->m_pkthdr.len; 1434 if (ath_tx_start(sc, ni, bfstaged, bfstaged->bf_m)) { 1435 DPRINTF(sc, ATH_DEBUG_XMIT, 1436 "%s: discard, xmit failure\n", __func__); 1437 ff_flushbad: 1438 /* 1439 * Unable to transmit frame that was on the staging 1440 * queue. Reclaim the node reference and other 1441 * resources. 1442 */ 1443 if (ni != NULL) 1444 ieee80211_free_node(ni); 1445 bfstaged->bf_node = NULL; 1446 if (bfstaged->bf_m != NULL) { 1447 m_freem(bfstaged->bf_m); 1448 bfstaged->bf_m = NULL; 1449 } 1450 1451 ATH_TXBUF_LOCK(sc); 1452 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bfstaged, bf_list); 1453 ATH_TXBUF_UNLOCK(sc); 1454 } else { 1455 #if 0 1456 ifp->if_opackets++; 1457 #endif 1458 } 1459 } else { 1460 if (an->an_ff_buf[pri] != NULL) { 1461 /* 1462 * XXX: out-of-order condition only occurs for AP 1463 * mode and multicast. There may be no valid way 1464 * to get this condition. 1465 */ 1466 DPRINTF(sc, ATH_DEBUG_FF, "[%s] out-of-order frame\n", 1467 ether_sprintf(an->an_node.ni_macaddr)); 1468 /* XXX stat */ 1469 } 1470 ATH_TXQ_UNLOCK(txq); 1471 } 1472 return m; 1473 } 1474 1475 /* 1476 * Cleanup driver resources when we run out of buffers 1477 * while processing fragments; return the tx buffers 1478 * allocated and drop node references. 1479 */ 1480 static void 1481 ath_txfrag_cleanup(struct ath_softc *sc, 1482 ath_bufhead *frags, struct ieee80211_node *ni) 1483 { 1484 struct ath_buf *bf, *next; 1485 1486 ATH_TXBUF_LOCK_ASSERT(sc); 1487 1488 STAILQ_FOREACH_SAFE(bf, frags, bf_list, next) { 1489 /* NB: bf assumed clean */ 1490 STAILQ_REMOVE_HEAD(frags, bf_list); 1491 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1492 ieee80211_node_decref(ni); 1493 } 1494 } 1495 1496 /* 1497 * Setup xmit of a fragmented frame. Allocate a buffer 1498 * for each frag and bump the node reference count to 1499 * reflect the held reference to be setup by ath_tx_start. 1500 */ 1501 static int 1502 ath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags, 1503 struct mbuf *m0, struct ieee80211_node *ni) 1504 { 1505 struct mbuf *m; 1506 struct ath_buf *bf; 1507 1508 ATH_TXBUF_LOCK(sc); 1509 for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) { 1510 bf = STAILQ_FIRST(&sc->sc_txbuf); 1511 if (bf == NULL) { /* out of buffers, cleanup */ 1512 ath_txfrag_cleanup(sc, frags, ni); 1513 break; 1514 } 1515 STAILQ_REMOVE_HEAD(&sc->sc_txbuf, bf_list); 1516 ieee80211_node_incref(ni); 1517 STAILQ_INSERT_TAIL(frags, bf, bf_list); 1518 } 1519 ATH_TXBUF_UNLOCK(sc); 1520 1521 return !STAILQ_EMPTY(frags); 1522 } 1523 1524 static void 1525 ath_start(struct ifnet *ifp) 1526 { 1527 struct ath_softc *sc = ifp->if_softc; 1528 struct ath_hal *ah = sc->sc_ah; 1529 struct ieee80211com *ic = &sc->sc_ic; 1530 struct ieee80211_node *ni; 1531 struct ath_buf *bf; 1532 struct mbuf *m, *next; 1533 struct ieee80211_frame *wh; 1534 struct ether_header *eh; 1535 struct ath_txq *txq; 1536 ath_bufhead frags; 1537 int pri; 1538 1539 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) 1540 return; 1541 for (;;) { 1542 /* 1543 * Grab a TX buffer and associated resources. 1544 */ 1545 ATH_TXBUF_LOCK(sc); 1546 bf = STAILQ_FIRST(&sc->sc_txbuf); 1547 if (bf != NULL) 1548 STAILQ_REMOVE_HEAD(&sc->sc_txbuf, bf_list); 1549 ATH_TXBUF_UNLOCK(sc); 1550 if (bf == NULL) { 1551 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: out of xmit buffers\n", 1552 __func__); 1553 sc->sc_stats.ast_tx_qstop++; 1554 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1555 break; 1556 } 1557 /* 1558 * Poll the management queue for frames; they 1559 * have priority over normal data frames. 1560 */ 1561 IF_DEQUEUE(&ic->ic_mgtq, m); 1562 if (m == NULL) { 1563 /* 1564 * No data frames go out unless we're associated. 1565 */ 1566 if (ic->ic_state != IEEE80211_S_RUN) { 1567 DPRINTF(sc, ATH_DEBUG_XMIT, 1568 "%s: discard data packet, state %s\n", 1569 __func__, 1570 ieee80211_state_name[ic->ic_state]); 1571 sc->sc_stats.ast_tx_discard++; 1572 ATH_TXBUF_LOCK(sc); 1573 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1574 ATH_TXBUF_UNLOCK(sc); 1575 break; 1576 } 1577 IFQ_DRV_DEQUEUE(&ifp->if_snd, m); /* XXX: LOCK */ 1578 if (m == NULL) { 1579 ATH_TXBUF_LOCK(sc); 1580 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1581 ATH_TXBUF_UNLOCK(sc); 1582 break; 1583 } 1584 /* 1585 * Cancel any background scan. 1586 */ 1587 if (ic->ic_flags & IEEE80211_F_SCAN) 1588 ieee80211_cancel_scan(ic); 1589 1590 STAILQ_INIT(&frags); 1591 /* 1592 * Find the node for the destination so we can do 1593 * things like power save and fast frames aggregation. 1594 */ 1595 if (m->m_len < sizeof(struct ether_header) && 1596 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 1597 ic->ic_stats.is_tx_nobuf++; /* XXX */ 1598 ni = NULL; 1599 goto bad; 1600 } 1601 eh = mtod(m, struct ether_header *); 1602 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 1603 if (ni == NULL) { 1604 /* NB: ieee80211_find_txnode does stat+msg */ 1605 m_freem(m); 1606 goto bad; 1607 } 1608 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1609 (m->m_flags & M_PWR_SAV) == 0) { 1610 /* 1611 * Station in power save mode; pass the frame 1612 * to the 802.11 layer and continue. We'll get 1613 * the frame back when the time is right. 1614 */ 1615 ieee80211_pwrsave(ni, m); 1616 goto reclaim; 1617 } 1618 /* calculate priority so we can find the tx queue */ 1619 if (ieee80211_classify(ic, m, ni)) { 1620 DPRINTF(sc, ATH_DEBUG_XMIT, 1621 "%s: discard, classification failure\n", 1622 __func__); 1623 m_freem(m); 1624 goto bad; 1625 } 1626 pri = M_WME_GETAC(m); 1627 txq = sc->sc_ac2q[pri]; 1628 if (ni->ni_ath_flags & IEEE80211_NODE_FF) { 1629 /* 1630 * Check queue length; if too deep drop this 1631 * frame (tail drop considered good). 1632 */ 1633 if (txq->axq_depth >= sc->sc_fftxqmax) { 1634 DPRINTF(sc, ATH_DEBUG_FF, 1635 "[%s] tail drop on q %u depth %u\n", 1636 ether_sprintf(ni->ni_macaddr), 1637 txq->axq_qnum, txq->axq_depth); 1638 sc->sc_stats.ast_tx_qfull++; 1639 m_freem(m); 1640 goto reclaim; 1641 } 1642 m = ath_ff_check(sc, txq, bf, m, ni); 1643 if (m == NULL) { 1644 /* NB: ni ref & bf held on stageq */ 1645 continue; 1646 } 1647 } 1648 ifp->if_opackets++; 1649 BPF_MTAP(ifp, m); 1650 /* 1651 * Encapsulate the packet in prep for transmission. 1652 */ 1653 m = ieee80211_encap(ic, m, ni); 1654 if (m == NULL) { 1655 DPRINTF(sc, ATH_DEBUG_XMIT, 1656 "%s: encapsulation failure\n", 1657 __func__); 1658 sc->sc_stats.ast_tx_encap++; 1659 goto bad; 1660 } 1661 /* 1662 * Check for fragmentation. If this frame 1663 * has been broken up verify we have enough 1664 * buffers to send all the fragments so all 1665 * go out or none... 1666 */ 1667 if ((m->m_flags & M_FRAG) && 1668 !ath_txfrag_setup(sc, &frags, m, ni)) { 1669 DPRINTF(sc, ATH_DEBUG_XMIT, 1670 "%s: out of txfrag buffers\n", __func__); 1671 ic->ic_stats.is_tx_nobuf++; /* XXX */ 1672 ath_freetx(m); 1673 goto bad; 1674 } 1675 } else { 1676 /* 1677 * Hack! The referenced node pointer is in the 1678 * rcvif field of the packet header. This is 1679 * placed there by ieee80211_mgmt_output because 1680 * we need to hold the reference with the frame 1681 * and there's no other way (other than packet 1682 * tags which we consider too expensive to use) 1683 * to pass it along. 1684 */ 1685 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 1686 m->m_pkthdr.rcvif = NULL; 1687 1688 wh = mtod(m, struct ieee80211_frame *); 1689 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1690 IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1691 /* fill time stamp */ 1692 u_int64_t tsf; 1693 u_int32_t *tstamp; 1694 1695 tsf = ath_hal_gettsf64(ah); 1696 /* XXX: adjust 100us delay to xmit */ 1697 tsf += 100; 1698 tstamp = (u_int32_t *)&wh[1]; 1699 tstamp[0] = htole32(tsf & 0xffffffff); 1700 tstamp[1] = htole32(tsf >> 32); 1701 } 1702 sc->sc_stats.ast_tx_mgmt++; 1703 } 1704 1705 nextfrag: 1706 /* 1707 * Pass the frame to the h/w for transmission. 1708 * Fragmented frames have each frag chained together 1709 * with m_nextpkt. We know there are sufficient ath_buf's 1710 * to send all the frags because of work done by 1711 * ath_txfrag_setup. We leave m_nextpkt set while 1712 * calling ath_tx_start so it can use it to extend the 1713 * the tx duration to cover the subsequent frag and 1714 * so it can reclaim all the mbufs in case of an error; 1715 * ath_tx_start clears m_nextpkt once it commits to 1716 * handing the frame to the hardware. 1717 */ 1718 next = m->m_nextpkt; 1719 if (ath_tx_start(sc, ni, bf, m)) { 1720 bad: 1721 ifp->if_oerrors++; 1722 reclaim: 1723 bf->bf_m = NULL; 1724 bf->bf_node = NULL; 1725 ATH_TXBUF_LOCK(sc); 1726 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1727 ath_txfrag_cleanup(sc, &frags, ni); 1728 ATH_TXBUF_UNLOCK(sc); 1729 if (ni != NULL) 1730 ieee80211_free_node(ni); 1731 continue; 1732 } 1733 if (next != NULL) { 1734 /* 1735 * Beware of state changing between frags. 1736 * XXX check sta power-save state? 1737 */ 1738 if (ic->ic_state != IEEE80211_S_RUN) { 1739 DPRINTF(sc, ATH_DEBUG_XMIT, 1740 "%s: flush fragmented packet, state %s\n", 1741 __func__, 1742 ieee80211_state_name[ic->ic_state]); 1743 ath_freetx(next); 1744 goto reclaim; 1745 } 1746 m = next; 1747 bf = STAILQ_FIRST(&frags); 1748 KASSERT(bf != NULL, ("no buf for txfrag")); 1749 STAILQ_REMOVE_HEAD(&frags, bf_list); 1750 goto nextfrag; 1751 } 1752 1753 ifp->if_timer = 5; 1754 ic->ic_lastdata = ticks; 1755 #if 0 1756 /* 1757 * Flush stale frames from the fast-frame staging queue. 1758 */ 1759 if (ic->ic_opmode != IEEE80211_M_STA) 1760 ath_ff_stageq_flush(sc, txq, ath_ff_ageflushtestdone); 1761 #endif 1762 } 1763 } 1764 1765 static int 1766 ath_media_change(struct ifnet *ifp) 1767 { 1768 #define IS_UP(ifp) \ 1769 ((ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING)) 1770 int error; 1771 1772 error = ieee80211_media_change(ifp); 1773 if (error == ENETRESET) { 1774 struct ath_softc *sc = ifp->if_softc; 1775 struct ieee80211com *ic = &sc->sc_ic; 1776 1777 if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 1778 /* 1779 * Adhoc demo mode is just ibss mode w/o beacons 1780 * (mostly). The hal knows nothing about it; 1781 * tell it we're operating in ibss mode. 1782 */ 1783 sc->sc_opmode = HAL_M_IBSS; 1784 } else 1785 sc->sc_opmode = ic->ic_opmode; 1786 if (IS_UP(ifp)) 1787 ath_init(sc); /* XXX lose error */ 1788 error = 0; 1789 } 1790 return error; 1791 #undef IS_UP 1792 } 1793 1794 #ifdef ATH_DEBUG 1795 static void 1796 ath_keyprint(struct ath_softc *sc, const char *tag, u_int ix, 1797 const HAL_KEYVAL *hk, const u_int8_t mac[IEEE80211_ADDR_LEN]) 1798 { 1799 static const char *ciphers[] = { 1800 "WEP", 1801 "AES-OCB", 1802 "AES-CCM", 1803 "CKIP", 1804 "TKIP", 1805 "CLR", 1806 }; 1807 int i, n; 1808 1809 printf("%s: [%02u] %-7s ", tag, ix, ciphers[hk->kv_type]); 1810 for (i = 0, n = hk->kv_len; i < n; i++) 1811 printf("%02x", hk->kv_val[i]); 1812 printf(" mac %s", ether_sprintf(mac)); 1813 if (hk->kv_type == HAL_CIPHER_TKIP) { 1814 printf(" %s ", sc->sc_splitmic ? "mic" : "rxmic"); 1815 for (i = 0; i < sizeof(hk->kv_mic); i++) 1816 printf("%02x", hk->kv_mic[i]); 1817 #if HAL_ABI_VERSION > 0x06052200 1818 if (!sc->sc_splitmic) { 1819 printf(" txmic "); 1820 for (i = 0; i < sizeof(hk->kv_txmic); i++) 1821 printf("%02x", hk->kv_txmic[i]); 1822 } 1823 #endif 1824 } 1825 printf("\n"); 1826 } 1827 #endif 1828 1829 /* 1830 * Set a TKIP key into the hardware. This handles the 1831 * potential distribution of key state to multiple key 1832 * cache slots for TKIP. 1833 */ 1834 static int 1835 ath_keyset_tkip(struct ath_softc *sc, const struct ieee80211_key *k, 1836 HAL_KEYVAL *hk, const u_int8_t mac[IEEE80211_ADDR_LEN]) 1837 { 1838 #define IEEE80211_KEY_XR (IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV) 1839 static const u_int8_t zerobssid[IEEE80211_ADDR_LEN]; 1840 struct ath_hal *ah = sc->sc_ah; 1841 1842 KASSERT(k->wk_cipher->ic_cipher == IEEE80211_CIPHER_TKIP, 1843 ("got a non-TKIP key, cipher %u", k->wk_cipher->ic_cipher)); 1844 if ((k->wk_flags & IEEE80211_KEY_XR) == IEEE80211_KEY_XR) { 1845 if (sc->sc_splitmic) { 1846 /* 1847 * TX key goes at first index, RX key at the rx index. 1848 * The hal handles the MIC keys at index+64. 1849 */ 1850 memcpy(hk->kv_mic, k->wk_txmic, sizeof(hk->kv_mic)); 1851 KEYPRINTF(sc, k->wk_keyix, hk, zerobssid); 1852 if (!ath_hal_keyset(ah, k->wk_keyix, hk, zerobssid)) 1853 return 0; 1854 1855 memcpy(hk->kv_mic, k->wk_rxmic, sizeof(hk->kv_mic)); 1856 KEYPRINTF(sc, k->wk_keyix+32, hk, mac); 1857 /* XXX delete tx key on failure? */ 1858 return ath_hal_keyset(ah, k->wk_keyix+32, hk, mac); 1859 } else { 1860 /* 1861 * Room for both TX+RX MIC keys in one key cache 1862 * slot, just set key at the first index; the hal 1863 * will handle the reset. 1864 */ 1865 memcpy(hk->kv_mic, k->wk_rxmic, sizeof(hk->kv_mic)); 1866 #if HAL_ABI_VERSION > 0x06052200 1867 memcpy(hk->kv_txmic, k->wk_txmic, sizeof(hk->kv_txmic)); 1868 #endif 1869 KEYPRINTF(sc, k->wk_keyix, hk, mac); 1870 return ath_hal_keyset(ah, k->wk_keyix, hk, mac); 1871 } 1872 } else if (k->wk_flags & IEEE80211_KEY_XR) { 1873 /* 1874 * TX/RX key goes at first index. 1875 * The hal handles the MIC keys are index+64. 1876 */ 1877 memcpy(hk->kv_mic, k->wk_flags & IEEE80211_KEY_XMIT ? 1878 k->wk_txmic : k->wk_rxmic, sizeof(hk->kv_mic)); 1879 KEYPRINTF(sc, k->wk_keyix, hk, mac); 1880 return ath_hal_keyset(ah, k->wk_keyix, hk, mac); 1881 } 1882 return 0; 1883 #undef IEEE80211_KEY_XR 1884 } 1885 1886 /* 1887 * Set a net80211 key into the hardware. This handles the 1888 * potential distribution of key state to multiple key 1889 * cache slots for TKIP with hardware MIC support. 1890 */ 1891 static int 1892 ath_keyset(struct ath_softc *sc, const struct ieee80211_key *k, 1893 const u_int8_t mac0[IEEE80211_ADDR_LEN], 1894 struct ieee80211_node *bss) 1895 { 1896 #define N(a) (sizeof(a)/sizeof(a[0])) 1897 static const u_int8_t ciphermap[] = { 1898 HAL_CIPHER_WEP, /* IEEE80211_CIPHER_WEP */ 1899 HAL_CIPHER_TKIP, /* IEEE80211_CIPHER_TKIP */ 1900 HAL_CIPHER_AES_OCB, /* IEEE80211_CIPHER_AES_OCB */ 1901 HAL_CIPHER_AES_CCM, /* IEEE80211_CIPHER_AES_CCM */ 1902 (u_int8_t) -1, /* 4 is not allocated */ 1903 HAL_CIPHER_CKIP, /* IEEE80211_CIPHER_CKIP */ 1904 HAL_CIPHER_CLR, /* IEEE80211_CIPHER_NONE */ 1905 }; 1906 struct ath_hal *ah = sc->sc_ah; 1907 const struct ieee80211_cipher *cip = k->wk_cipher; 1908 u_int8_t gmac[IEEE80211_ADDR_LEN]; 1909 const u_int8_t *mac; 1910 HAL_KEYVAL hk; 1911 1912 memset(&hk, 0, sizeof(hk)); 1913 /* 1914 * Software crypto uses a "clear key" so non-crypto 1915 * state kept in the key cache are maintained and 1916 * so that rx frames have an entry to match. 1917 */ 1918 if ((k->wk_flags & IEEE80211_KEY_SWCRYPT) == 0) { 1919 KASSERT(cip->ic_cipher < N(ciphermap), 1920 ("invalid cipher type %u", cip->ic_cipher)); 1921 hk.kv_type = ciphermap[cip->ic_cipher]; 1922 hk.kv_len = k->wk_keylen; 1923 memcpy(hk.kv_val, k->wk_key, k->wk_keylen); 1924 } else 1925 hk.kv_type = HAL_CIPHER_CLR; 1926 1927 if ((k->wk_flags & IEEE80211_KEY_GROUP) && sc->sc_mcastkey) { 1928 /* 1929 * Group keys on hardware that supports multicast frame 1930 * key search use a mac that is the sender's address with 1931 * the high bit set instead of the app-specified address. 1932 */ 1933 IEEE80211_ADDR_COPY(gmac, bss->ni_macaddr); 1934 gmac[0] |= 0x80; 1935 mac = gmac; 1936 } else 1937 mac = mac0; 1938 1939 if (hk.kv_type == HAL_CIPHER_TKIP && 1940 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0) { 1941 return ath_keyset_tkip(sc, k, &hk, mac); 1942 } else { 1943 KEYPRINTF(sc, k->wk_keyix, &hk, mac); 1944 return ath_hal_keyset(ah, k->wk_keyix, &hk, mac); 1945 } 1946 #undef N 1947 } 1948 1949 /* 1950 * Allocate tx/rx key slots for TKIP. We allocate two slots for 1951 * each key, one for decrypt/encrypt and the other for the MIC. 1952 */ 1953 static u_int16_t 1954 key_alloc_2pair(struct ath_softc *sc, 1955 ieee80211_keyix *txkeyix, ieee80211_keyix *rxkeyix) 1956 { 1957 #define N(a) (sizeof(a)/sizeof(a[0])) 1958 u_int i, keyix; 1959 1960 KASSERT(sc->sc_splitmic, ("key cache !split")); 1961 /* XXX could optimize */ 1962 for (i = 0; i < N(sc->sc_keymap)/4; i++) { 1963 u_int8_t b = sc->sc_keymap[i]; 1964 if (b != 0xff) { 1965 /* 1966 * One or more slots in this byte are free. 1967 */ 1968 keyix = i*NBBY; 1969 while (b & 1) { 1970 again: 1971 keyix++; 1972 b >>= 1; 1973 } 1974 /* XXX IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV */ 1975 if (isset(sc->sc_keymap, keyix+32) || 1976 isset(sc->sc_keymap, keyix+64) || 1977 isset(sc->sc_keymap, keyix+32+64)) { 1978 /* full pair unavailable */ 1979 /* XXX statistic */ 1980 if (keyix == (i+1)*NBBY) { 1981 /* no slots were appropriate, advance */ 1982 continue; 1983 } 1984 goto again; 1985 } 1986 setbit(sc->sc_keymap, keyix); 1987 setbit(sc->sc_keymap, keyix+64); 1988 setbit(sc->sc_keymap, keyix+32); 1989 setbit(sc->sc_keymap, keyix+32+64); 1990 DPRINTF(sc, ATH_DEBUG_KEYCACHE, 1991 "%s: key pair %u,%u %u,%u\n", 1992 __func__, keyix, keyix+64, 1993 keyix+32, keyix+32+64); 1994 *txkeyix = keyix; 1995 *rxkeyix = keyix+32; 1996 return 1; 1997 } 1998 } 1999 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: out of pair space\n", __func__); 2000 return 0; 2001 #undef N 2002 } 2003 2004 /* 2005 * Allocate tx/rx key slots for TKIP. We allocate two slots for 2006 * each key, one for decrypt/encrypt and the other for the MIC. 2007 */ 2008 static u_int16_t 2009 key_alloc_pair(struct ath_softc *sc, 2010 ieee80211_keyix *txkeyix, ieee80211_keyix *rxkeyix) 2011 { 2012 #define N(a) (sizeof(a)/sizeof(a[0])) 2013 u_int i, keyix; 2014 2015 KASSERT(!sc->sc_splitmic, ("key cache split")); 2016 /* XXX could optimize */ 2017 for (i = 0; i < N(sc->sc_keymap)/4; i++) { 2018 u_int8_t b = sc->sc_keymap[i]; 2019 if (b != 0xff) { 2020 /* 2021 * One or more slots in this byte are free. 2022 */ 2023 keyix = i*NBBY; 2024 while (b & 1) { 2025 again: 2026 keyix++; 2027 b >>= 1; 2028 } 2029 if (isset(sc->sc_keymap, keyix+64)) { 2030 /* full pair unavailable */ 2031 /* XXX statistic */ 2032 if (keyix == (i+1)*NBBY) { 2033 /* no slots were appropriate, advance */ 2034 continue; 2035 } 2036 goto again; 2037 } 2038 setbit(sc->sc_keymap, keyix); 2039 setbit(sc->sc_keymap, keyix+64); 2040 DPRINTF(sc, ATH_DEBUG_KEYCACHE, 2041 "%s: key pair %u,%u\n", 2042 __func__, keyix, keyix+64); 2043 *txkeyix = *rxkeyix = keyix; 2044 return 1; 2045 } 2046 } 2047 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: out of pair space\n", __func__); 2048 return 0; 2049 #undef N 2050 } 2051 2052 /* 2053 * Allocate a single key cache slot. 2054 */ 2055 static int 2056 key_alloc_single(struct ath_softc *sc, 2057 ieee80211_keyix *txkeyix, ieee80211_keyix *rxkeyix) 2058 { 2059 #define N(a) (sizeof(a)/sizeof(a[0])) 2060 u_int i, keyix; 2061 2062 /* XXX try i,i+32,i+64,i+32+64 to minimize key pair conflicts */ 2063 for (i = 0; i < N(sc->sc_keymap); i++) { 2064 u_int8_t b = sc->sc_keymap[i]; 2065 if (b != 0xff) { 2066 /* 2067 * One or more slots are free. 2068 */ 2069 keyix = i*NBBY; 2070 while (b & 1) 2071 keyix++, b >>= 1; 2072 setbit(sc->sc_keymap, keyix); 2073 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: key %u\n", 2074 __func__, keyix); 2075 *txkeyix = *rxkeyix = keyix; 2076 return 1; 2077 } 2078 } 2079 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: out of space\n", __func__); 2080 return 0; 2081 #undef N 2082 } 2083 2084 /* 2085 * Allocate one or more key cache slots for a uniacst key. The 2086 * key itself is needed only to identify the cipher. For hardware 2087 * TKIP with split cipher+MIC keys we allocate two key cache slot 2088 * pairs so that we can setup separate TX and RX MIC keys. Note 2089 * that the MIC key for a TKIP key at slot i is assumed by the 2090 * hardware to be at slot i+64. This limits TKIP keys to the first 2091 * 64 entries. 2092 */ 2093 static int 2094 ath_key_alloc(struct ieee80211com *ic, const struct ieee80211_key *k, 2095 ieee80211_keyix *keyix, ieee80211_keyix *rxkeyix) 2096 { 2097 struct ath_softc *sc = ic->ic_ifp->if_softc; 2098 2099 /* 2100 * Group key allocation must be handled specially for 2101 * parts that do not support multicast key cache search 2102 * functionality. For those parts the key id must match 2103 * the h/w key index so lookups find the right key. On 2104 * parts w/ the key search facility we install the sender's 2105 * mac address (with the high bit set) and let the hardware 2106 * find the key w/o using the key id. This is preferred as 2107 * it permits us to support multiple users for adhoc and/or 2108 * multi-station operation. 2109 */ 2110 if ((k->wk_flags & IEEE80211_KEY_GROUP) && !sc->sc_mcastkey) { 2111 if (!(&ic->ic_nw_keys[0] <= k && 2112 k < &ic->ic_nw_keys[IEEE80211_WEP_NKID])) { 2113 /* should not happen */ 2114 DPRINTF(sc, ATH_DEBUG_KEYCACHE, 2115 "%s: bogus group key\n", __func__); 2116 return 0; 2117 } 2118 /* 2119 * XXX we pre-allocate the global keys so 2120 * have no way to check if they've already been allocated. 2121 */ 2122 *keyix = *rxkeyix = k - ic->ic_nw_keys; 2123 return 1; 2124 } 2125 2126 /* 2127 * We allocate two pair for TKIP when using the h/w to do 2128 * the MIC. For everything else, including software crypto, 2129 * we allocate a single entry. Note that s/w crypto requires 2130 * a pass-through slot on the 5211 and 5212. The 5210 does 2131 * not support pass-through cache entries and we map all 2132 * those requests to slot 0. 2133 */ 2134 if (k->wk_flags & IEEE80211_KEY_SWCRYPT) { 2135 return key_alloc_single(sc, keyix, rxkeyix); 2136 } else if (k->wk_cipher->ic_cipher == IEEE80211_CIPHER_TKIP && 2137 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0) { 2138 if (sc->sc_splitmic) 2139 return key_alloc_2pair(sc, keyix, rxkeyix); 2140 else 2141 return key_alloc_pair(sc, keyix, rxkeyix); 2142 } else { 2143 return key_alloc_single(sc, keyix, rxkeyix); 2144 } 2145 } 2146 2147 /* 2148 * Delete an entry in the key cache allocated by ath_key_alloc. 2149 */ 2150 static int 2151 ath_key_delete(struct ieee80211com *ic, const struct ieee80211_key *k) 2152 { 2153 struct ath_softc *sc = ic->ic_ifp->if_softc; 2154 struct ath_hal *ah = sc->sc_ah; 2155 const struct ieee80211_cipher *cip = k->wk_cipher; 2156 u_int keyix = k->wk_keyix; 2157 2158 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: delete key %u\n", __func__, keyix); 2159 2160 ath_hal_keyreset(ah, keyix); 2161 /* 2162 * Handle split tx/rx keying required for TKIP with h/w MIC. 2163 */ 2164 if (cip->ic_cipher == IEEE80211_CIPHER_TKIP && 2165 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && sc->sc_splitmic) 2166 ath_hal_keyreset(ah, keyix+32); /* RX key */ 2167 if (keyix >= IEEE80211_WEP_NKID) { 2168 /* 2169 * Don't touch keymap entries for global keys so 2170 * they are never considered for dynamic allocation. 2171 */ 2172 clrbit(sc->sc_keymap, keyix); 2173 if (cip->ic_cipher == IEEE80211_CIPHER_TKIP && 2174 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0) { 2175 clrbit(sc->sc_keymap, keyix+64); /* TX key MIC */ 2176 if (sc->sc_splitmic) { 2177 /* +32 for RX key, +32+64 for RX key MIC */ 2178 clrbit(sc->sc_keymap, keyix+32); 2179 clrbit(sc->sc_keymap, keyix+32+64); 2180 } 2181 } 2182 } 2183 return 1; 2184 } 2185 2186 /* 2187 * Set the key cache contents for the specified key. Key cache 2188 * slot(s) must already have been allocated by ath_key_alloc. 2189 */ 2190 static int 2191 ath_key_set(struct ieee80211com *ic, const struct ieee80211_key *k, 2192 const u_int8_t mac[IEEE80211_ADDR_LEN]) 2193 { 2194 struct ath_softc *sc = ic->ic_ifp->if_softc; 2195 2196 return ath_keyset(sc, k, mac, ic->ic_bss); 2197 } 2198 2199 /* 2200 * Block/unblock tx+rx processing while a key change is done. 2201 * We assume the caller serializes key management operations 2202 * so we only need to worry about synchronization with other 2203 * uses that originate in the driver. 2204 */ 2205 static void 2206 ath_key_update_begin(struct ieee80211com *ic) 2207 { 2208 struct ifnet *ifp = ic->ic_ifp; 2209 struct ath_softc *sc = ifp->if_softc; 2210 2211 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 2212 #if 0 2213 tasklet_disable(&sc->sc_rxtq); 2214 #endif 2215 IF_LOCK(&ifp->if_snd); /* NB: doesn't block mgmt frames */ 2216 } 2217 2218 static void 2219 ath_key_update_end(struct ieee80211com *ic) 2220 { 2221 struct ifnet *ifp = ic->ic_ifp; 2222 struct ath_softc *sc = ifp->if_softc; 2223 2224 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 2225 IF_UNLOCK(&ifp->if_snd); 2226 #if 0 2227 tasklet_enable(&sc->sc_rxtq); 2228 #endif 2229 } 2230 2231 /* 2232 * Calculate the receive filter according to the 2233 * operating mode and state: 2234 * 2235 * o always accept unicast, broadcast, and multicast traffic 2236 * o maintain current state of phy error reception (the hal 2237 * may enable phy error frames for noise immunity work) 2238 * o probe request frames are accepted only when operating in 2239 * hostap, adhoc, or monitor modes 2240 * o enable promiscuous mode according to the interface state 2241 * o accept beacons: 2242 * - when operating in adhoc mode so the 802.11 layer creates 2243 * node table entries for peers, 2244 * - when operating in station mode for collecting rssi data when 2245 * the station is otherwise quiet, or 2246 * - when scanning 2247 * o accept control frames: 2248 * - when in monitor mode 2249 */ 2250 static u_int32_t 2251 ath_calcrxfilter(struct ath_softc *sc) 2252 { 2253 #define RX_FILTER_PRESERVE (HAL_RX_FILTER_PHYERR | HAL_RX_FILTER_PHYRADAR) 2254 struct ieee80211com *ic = &sc->sc_ic; 2255 struct ath_hal *ah = sc->sc_ah; 2256 struct ifnet *ifp = sc->sc_ifp; 2257 u_int32_t rfilt; 2258 2259 rfilt = (ath_hal_getrxfilter(ah) & RX_FILTER_PRESERVE) 2260 | HAL_RX_FILTER_UCAST | HAL_RX_FILTER_BCAST | HAL_RX_FILTER_MCAST; 2261 if (ic->ic_opmode != IEEE80211_M_STA) 2262 rfilt |= HAL_RX_FILTER_PROBEREQ; 2263 if (ic->ic_opmode != IEEE80211_M_HOSTAP && 2264 (ifp->if_flags & IFF_PROMISC)) 2265 rfilt |= HAL_RX_FILTER_PROM; 2266 if (ic->ic_opmode == IEEE80211_M_STA || 2267 ic->ic_opmode == IEEE80211_M_IBSS || 2268 sc->sc_scanning) 2269 rfilt |= HAL_RX_FILTER_BEACON; 2270 if (ic->ic_opmode == IEEE80211_M_MONITOR) 2271 rfilt |= HAL_RX_FILTER_CONTROL; 2272 return rfilt; 2273 #undef RX_FILTER_PRESERVE 2274 } 2275 2276 static void 2277 ath_mode_init(struct ath_softc *sc) 2278 { 2279 struct ieee80211com *ic = &sc->sc_ic; 2280 struct ath_hal *ah = sc->sc_ah; 2281 struct ifnet *ifp = sc->sc_ifp; 2282 u_int32_t rfilt, mfilt[2], val; 2283 u_int8_t pos; 2284 struct ifmultiaddr *ifma; 2285 2286 /* configure rx filter */ 2287 rfilt = ath_calcrxfilter(sc); 2288 ath_hal_setrxfilter(ah, rfilt); 2289 2290 /* configure operational mode */ 2291 ath_hal_setopmode(ah); 2292 2293 /* 2294 * Handle any link-level address change. Note that we only 2295 * need to force ic_myaddr; any other addresses are handled 2296 * as a byproduct of the ifnet code marking the interface 2297 * down then up. 2298 * 2299 * XXX should get from lladdr instead of arpcom but that's more work 2300 */ 2301 IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp)); 2302 ath_hal_setmac(ah, ic->ic_myaddr); 2303 2304 /* calculate and install multicast filter */ 2305 if ((ifp->if_flags & IFF_ALLMULTI) == 0) { 2306 mfilt[0] = mfilt[1] = 0; 2307 IF_ADDR_LOCK(ifp); 2308 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2309 caddr_t dl; 2310 2311 /* calculate XOR of eight 6bit values */ 2312 dl = LLADDR((struct sockaddr_dl *) ifma->ifma_addr); 2313 val = LE_READ_4(dl + 0); 2314 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 2315 val = LE_READ_4(dl + 3); 2316 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 2317 pos &= 0x3f; 2318 mfilt[pos / 32] |= (1 << (pos % 32)); 2319 } 2320 IF_ADDR_UNLOCK(ifp); 2321 } else { 2322 mfilt[0] = mfilt[1] = ~0; 2323 } 2324 ath_hal_setmcastfilter(ah, mfilt[0], mfilt[1]); 2325 DPRINTF(sc, ATH_DEBUG_MODE, "%s: RX filter 0x%x, MC filter %08x:%08x\n", 2326 __func__, rfilt, mfilt[0], mfilt[1]); 2327 } 2328 2329 /* 2330 * Set the slot time based on the current setting. 2331 */ 2332 static void 2333 ath_setslottime(struct ath_softc *sc) 2334 { 2335 struct ieee80211com *ic = &sc->sc_ic; 2336 struct ath_hal *ah = sc->sc_ah; 2337 u_int usec; 2338 2339 if (IEEE80211_IS_CHAN_HALF(ic->ic_curchan)) 2340 usec = 13; 2341 else if (IEEE80211_IS_CHAN_QUARTER(ic->ic_curchan)) 2342 usec = 21; 2343 else if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan)) { 2344 /* honor short/long slot time only in 11g */ 2345 /* XXX shouldn't honor on pure g or turbo g channel */ 2346 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2347 usec = HAL_SLOT_TIME_9; 2348 else 2349 usec = HAL_SLOT_TIME_20; 2350 } else 2351 usec = HAL_SLOT_TIME_9; 2352 2353 DPRINTF(sc, ATH_DEBUG_RESET, 2354 "%s: chan %u MHz flags 0x%x %s slot, %u usec\n", 2355 __func__, ic->ic_curchan->ic_freq, ic->ic_curchan->ic_flags, 2356 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", usec); 2357 2358 ath_hal_setslottime(ah, usec); 2359 sc->sc_updateslot = OK; 2360 } 2361 2362 /* 2363 * Callback from the 802.11 layer to update the 2364 * slot time based on the current setting. 2365 */ 2366 static void 2367 ath_updateslot(struct ifnet *ifp) 2368 { 2369 struct ath_softc *sc = ifp->if_softc; 2370 struct ieee80211com *ic = &sc->sc_ic; 2371 2372 /* 2373 * When not coordinating the BSS, change the hardware 2374 * immediately. For other operation we defer the change 2375 * until beacon updates have propagated to the stations. 2376 */ 2377 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 2378 sc->sc_updateslot = UPDATE; 2379 else 2380 ath_setslottime(sc); 2381 } 2382 2383 /* 2384 * Setup a h/w transmit queue for beacons. 2385 */ 2386 static int 2387 ath_beaconq_setup(struct ath_hal *ah) 2388 { 2389 HAL_TXQ_INFO qi; 2390 2391 memset(&qi, 0, sizeof(qi)); 2392 qi.tqi_aifs = HAL_TXQ_USEDEFAULT; 2393 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; 2394 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; 2395 /* NB: for dynamic turbo, don't enable any other interrupts */ 2396 qi.tqi_qflags = HAL_TXQ_TXDESCINT_ENABLE; 2397 return ath_hal_setuptxqueue(ah, HAL_TX_QUEUE_BEACON, &qi); 2398 } 2399 2400 /* 2401 * Setup the transmit queue parameters for the beacon queue. 2402 */ 2403 static int 2404 ath_beaconq_config(struct ath_softc *sc) 2405 { 2406 #define ATH_EXPONENT_TO_VALUE(v) ((1<<(v))-1) 2407 struct ieee80211com *ic = &sc->sc_ic; 2408 struct ath_hal *ah = sc->sc_ah; 2409 HAL_TXQ_INFO qi; 2410 2411 ath_hal_gettxqueueprops(ah, sc->sc_bhalq, &qi); 2412 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 2413 /* 2414 * Always burst out beacon and CAB traffic. 2415 */ 2416 qi.tqi_aifs = ATH_BEACON_AIFS_DEFAULT; 2417 qi.tqi_cwmin = ATH_BEACON_CWMIN_DEFAULT; 2418 qi.tqi_cwmax = ATH_BEACON_CWMAX_DEFAULT; 2419 } else { 2420 struct wmeParams *wmep = 2421 &ic->ic_wme.wme_chanParams.cap_wmeParams[WME_AC_BE]; 2422 /* 2423 * Adhoc mode; important thing is to use 2x cwmin. 2424 */ 2425 qi.tqi_aifs = wmep->wmep_aifsn; 2426 qi.tqi_cwmin = 2*ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); 2427 qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); 2428 } 2429 2430 if (!ath_hal_settxqueueprops(ah, sc->sc_bhalq, &qi)) { 2431 device_printf(sc->sc_dev, "unable to update parameters for " 2432 "beacon hardware queue!\n"); 2433 return 0; 2434 } else { 2435 ath_hal_resettxqueue(ah, sc->sc_bhalq); /* push to h/w */ 2436 return 1; 2437 } 2438 #undef ATH_EXPONENT_TO_VALUE 2439 } 2440 2441 /* 2442 * Allocate and setup an initial beacon frame. 2443 */ 2444 static int 2445 ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_node *ni) 2446 { 2447 struct ath_buf *bf; 2448 struct mbuf *m; 2449 int error; 2450 2451 bf = STAILQ_FIRST(&sc->sc_bbuf); 2452 if (bf == NULL) { 2453 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: no dma buffers\n", __func__); 2454 sc->sc_stats.ast_be_nombuf++; /* XXX */ 2455 return ENOMEM; /* XXX */ 2456 } 2457 /* 2458 * NB: the beacon data buffer must be 32-bit aligned; 2459 * we assume the mbuf routines will return us something 2460 * with this alignment (perhaps should assert). 2461 */ 2462 m = ieee80211_beacon_alloc(ni, &sc->sc_boff); 2463 if (m == NULL) { 2464 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: cannot get mbuf\n", 2465 __func__); 2466 sc->sc_stats.ast_be_nombuf++; 2467 return ENOMEM; 2468 } 2469 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, 2470 bf->bf_segs, &bf->bf_nseg, 2471 BUS_DMA_NOWAIT); 2472 if (error == 0) { 2473 bf->bf_m = m; 2474 bf->bf_node = ieee80211_ref_node(ni); 2475 } else { 2476 m_freem(m); 2477 } 2478 return error; 2479 } 2480 2481 /* 2482 * Setup the beacon frame for transmit. 2483 */ 2484 static void 2485 ath_beacon_setup(struct ath_softc *sc, struct ath_buf *bf) 2486 { 2487 #define USE_SHPREAMBLE(_ic) \ 2488 (((_ic)->ic_flags & (IEEE80211_F_SHPREAMBLE | IEEE80211_F_USEBARKER))\ 2489 == IEEE80211_F_SHPREAMBLE) 2490 struct ieee80211_node *ni = bf->bf_node; 2491 struct ieee80211com *ic = ni->ni_ic; 2492 struct mbuf *m = bf->bf_m; 2493 struct ath_hal *ah = sc->sc_ah; 2494 struct ath_desc *ds; 2495 int flags, antenna; 2496 const HAL_RATE_TABLE *rt; 2497 u_int8_t rix, rate; 2498 2499 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: m %p len %u\n", 2500 __func__, m, m->m_len); 2501 2502 /* setup descriptors */ 2503 ds = bf->bf_desc; 2504 2505 flags = HAL_TXDESC_NOACK; 2506 if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) { 2507 ds->ds_link = bf->bf_daddr; /* self-linked */ 2508 flags |= HAL_TXDESC_VEOL; 2509 /* 2510 * Let hardware handle antenna switching. 2511 */ 2512 antenna = sc->sc_txantenna; 2513 } else { 2514 ds->ds_link = 0; 2515 /* 2516 * Switch antenna every 4 beacons. 2517 * XXX assumes two antenna 2518 */ 2519 antenna = sc->sc_txantenna != 0 ? sc->sc_txantenna 2520 : (sc->sc_stats.ast_be_xmit & 4 ? 2 : 1); 2521 } 2522 2523 KASSERT(bf->bf_nseg == 1, 2524 ("multi-segment beacon frame; nseg %u", bf->bf_nseg)); 2525 ds->ds_data = bf->bf_segs[0].ds_addr; 2526 /* 2527 * Calculate rate code. 2528 * XXX everything at min xmit rate 2529 */ 2530 rix = sc->sc_minrateix; 2531 rt = sc->sc_currates; 2532 rate = rt->info[rix].rateCode; 2533 if (USE_SHPREAMBLE(ic)) 2534 rate |= rt->info[rix].shortPreamble; 2535 ath_hal_setuptxdesc(ah, ds 2536 , m->m_len + IEEE80211_CRC_LEN /* frame length */ 2537 , sizeof(struct ieee80211_frame)/* header length */ 2538 , HAL_PKT_TYPE_BEACON /* Atheros packet type */ 2539 , ni->ni_txpower /* txpower XXX */ 2540 , rate, 1 /* series 0 rate/tries */ 2541 , HAL_TXKEYIX_INVALID /* no encryption */ 2542 , antenna /* antenna mode */ 2543 , flags /* no ack, veol for beacons */ 2544 , 0 /* rts/cts rate */ 2545 , 0 /* rts/cts duration */ 2546 ); 2547 /* NB: beacon's BufLen must be a multiple of 4 bytes */ 2548 ath_hal_filltxdesc(ah, ds 2549 , roundup(m->m_len, 4) /* buffer length */ 2550 , AH_TRUE /* first segment */ 2551 , AH_TRUE /* last segment */ 2552 , ds /* first descriptor */ 2553 ); 2554 #undef USE_SHPREAMBLE 2555 } 2556 2557 static void 2558 ath_beacon_update(struct ieee80211com *ic, int item) 2559 { 2560 struct ath_softc *sc = ic->ic_ifp->if_softc; 2561 struct ieee80211_beacon_offsets *bo = &sc->sc_boff; 2562 2563 setbit(bo->bo_flags, item); 2564 } 2565 2566 /* 2567 * Append the contents of src to dst; both queues 2568 * are assumed to be locked. 2569 */ 2570 static void 2571 ath_txqmove(struct ath_txq *dst, struct ath_txq *src) 2572 { 2573 STAILQ_CONCAT(&dst->axq_q, &src->axq_q); 2574 dst->axq_link = src->axq_link; 2575 src->axq_link = NULL; 2576 dst->axq_depth += src->axq_depth; 2577 src->axq_depth = 0; 2578 } 2579 2580 /* 2581 * Transmit a beacon frame at SWBA. Dynamic updates to the 2582 * frame contents are done as needed and the slot time is 2583 * also adjusted based on current state. 2584 */ 2585 static void 2586 ath_beacon_proc(void *arg, int pending) 2587 { 2588 struct ath_softc *sc = arg; 2589 struct ath_buf *bf = STAILQ_FIRST(&sc->sc_bbuf); 2590 struct ieee80211_node *ni = bf->bf_node; 2591 struct ieee80211com *ic = ni->ni_ic; 2592 struct ath_hal *ah = sc->sc_ah; 2593 struct ath_txq *cabq = sc->sc_cabq; 2594 struct mbuf *m; 2595 int ncabq, nmcastq, error, otherant; 2596 2597 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: pending %u\n", 2598 __func__, pending); 2599 2600 if (ic->ic_opmode == IEEE80211_M_STA || 2601 ic->ic_opmode == IEEE80211_M_MONITOR || 2602 bf == NULL || bf->bf_m == NULL) { 2603 DPRINTF(sc, ATH_DEBUG_ANY, "%s: ic_flags=%x bf=%p bf_m=%p\n", 2604 __func__, ic->ic_flags, bf, bf ? bf->bf_m : NULL); 2605 return; 2606 } 2607 /* 2608 * Check if the previous beacon has gone out. If 2609 * not don't try to post another, skip this period 2610 * and wait for the next. Missed beacons indicate 2611 * a problem and should not occur. If we miss too 2612 * many consecutive beacons reset the device. 2613 */ 2614 if (ath_hal_numtxpending(ah, sc->sc_bhalq) != 0) { 2615 sc->sc_bmisscount++; 2616 DPRINTF(sc, ATH_DEBUG_BEACON, 2617 "%s: missed %u consecutive beacons\n", 2618 __func__, sc->sc_bmisscount); 2619 if (sc->sc_bmisscount > 3) /* NB: 3 is a guess */ 2620 taskqueue_enqueue(sc->sc_tq, &sc->sc_bstucktask); 2621 return; 2622 } 2623 if (sc->sc_bmisscount != 0) { 2624 DPRINTF(sc, ATH_DEBUG_BEACON, 2625 "%s: resume beacon xmit after %u misses\n", 2626 __func__, sc->sc_bmisscount); 2627 sc->sc_bmisscount = 0; 2628 } 2629 2630 /* 2631 * Update dynamic beacon contents. If this returns 2632 * non-zero then we need to remap the memory because 2633 * the beacon frame changed size (probably because 2634 * of the TIM bitmap). 2635 */ 2636 m = bf->bf_m; 2637 nmcastq = sc->sc_mcastq.axq_depth; 2638 ncabq = ath_hal_numtxpending(ah, cabq->axq_qnum); 2639 if (ieee80211_beacon_update(bf->bf_node, &sc->sc_boff, m, ncabq+nmcastq)) { 2640 /* XXX too conservative? */ 2641 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 2642 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, 2643 bf->bf_segs, &bf->bf_nseg, 2644 BUS_DMA_NOWAIT); 2645 if (error != 0) { 2646 if_printf(ic->ic_ifp, 2647 "%s: bus_dmamap_load_mbuf_sg failed, error %u\n", 2648 __func__, error); 2649 return; 2650 } 2651 } 2652 if (ncabq && (sc->sc_boff.bo_tim[4] & 1)) { 2653 /* 2654 * CABQ traffic from the previous DTIM is still pending. 2655 * This is ok for now but when there are multiple vap's 2656 * and we are using staggered beacons we'll want to drain 2657 * the cabq before loading frames for the different vap. 2658 */ 2659 DPRINTF(sc, ATH_DEBUG_BEACON, 2660 "%s: cabq did not drain, mcastq %u cabq %u/%u\n", 2661 __func__, nmcastq, ncabq, cabq->axq_depth); 2662 sc->sc_stats.ast_cabq_busy++; 2663 } 2664 2665 /* 2666 * Handle slot time change when a non-ERP station joins/leaves 2667 * an 11g network. The 802.11 layer notifies us via callback, 2668 * we mark updateslot, then wait one beacon before effecting 2669 * the change. This gives associated stations at least one 2670 * beacon interval to note the state change. 2671 */ 2672 /* XXX locking */ 2673 if (sc->sc_updateslot == UPDATE) 2674 sc->sc_updateslot = COMMIT; /* commit next beacon */ 2675 else if (sc->sc_updateslot == COMMIT) 2676 ath_setslottime(sc); /* commit change to h/w */ 2677 2678 /* 2679 * Check recent per-antenna transmit statistics and flip 2680 * the default antenna if noticeably more frames went out 2681 * on the non-default antenna. 2682 * XXX assumes 2 anntenae 2683 */ 2684 otherant = sc->sc_defant & 1 ? 2 : 1; 2685 if (sc->sc_ant_tx[otherant] > sc->sc_ant_tx[sc->sc_defant] + 2) 2686 ath_setdefantenna(sc, otherant); 2687 sc->sc_ant_tx[1] = sc->sc_ant_tx[2] = 0; 2688 2689 /* 2690 * Construct tx descriptor. 2691 */ 2692 ath_beacon_setup(sc, bf); 2693 2694 /* 2695 * Stop any current dma and put the new frame on the queue. 2696 * This should never fail since we check above that no frames 2697 * are still pending on the queue. 2698 */ 2699 if (!ath_hal_stoptxdma(ah, sc->sc_bhalq)) { 2700 DPRINTF(sc, ATH_DEBUG_ANY, 2701 "%s: beacon queue %u did not stop?\n", 2702 __func__, sc->sc_bhalq); 2703 } 2704 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 2705 2706 /* 2707 * Enable the CAB queue before the beacon queue to 2708 * insure cab frames are triggered by this beacon. 2709 */ 2710 if (sc->sc_boff.bo_tim_len && (sc->sc_boff.bo_tim[4] & 1)) { 2711 /* NB: only at DTIM */ 2712 ATH_TXQ_LOCK(cabq); 2713 ATH_TXQ_LOCK(&sc->sc_mcastq); 2714 if (nmcastq) { 2715 struct ath_buf *bfm; 2716 2717 /* 2718 * Move frames from the s/w mcast q to the h/w cab q. 2719 */ 2720 bfm = STAILQ_FIRST(&sc->sc_mcastq.axq_q); 2721 if (cabq->axq_link != NULL) { 2722 *cabq->axq_link = bfm->bf_daddr; 2723 } else 2724 ath_hal_puttxbuf(ah, cabq->axq_qnum, 2725 bfm->bf_daddr); 2726 ath_txqmove(cabq, &sc->sc_mcastq); 2727 2728 sc->sc_stats.ast_cabq_xmit += nmcastq; 2729 } 2730 /* NB: gated by beacon so safe to start here */ 2731 ath_hal_txstart(ah, cabq->axq_qnum); 2732 ATH_TXQ_UNLOCK(cabq); 2733 ATH_TXQ_UNLOCK(&sc->sc_mcastq); 2734 } 2735 ath_hal_puttxbuf(ah, sc->sc_bhalq, bf->bf_daddr); 2736 ath_hal_txstart(ah, sc->sc_bhalq); 2737 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, 2738 "%s: TXDP[%u] = %p (%p)\n", __func__, 2739 sc->sc_bhalq, (caddr_t)bf->bf_daddr, bf->bf_desc); 2740 2741 sc->sc_stats.ast_be_xmit++; 2742 } 2743 2744 /* 2745 * Reset the hardware after detecting beacons have stopped. 2746 */ 2747 static void 2748 ath_bstuck_proc(void *arg, int pending) 2749 { 2750 struct ath_softc *sc = arg; 2751 struct ifnet *ifp = sc->sc_ifp; 2752 2753 if_printf(ifp, "stuck beacon; resetting (bmiss count %u)\n", 2754 sc->sc_bmisscount); 2755 ath_reset(ifp); 2756 } 2757 2758 /* 2759 * Reclaim beacon resources. 2760 */ 2761 static void 2762 ath_beacon_free(struct ath_softc *sc) 2763 { 2764 struct ath_buf *bf; 2765 2766 STAILQ_FOREACH(bf, &sc->sc_bbuf, bf_list) { 2767 if (bf->bf_m != NULL) { 2768 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 2769 m_freem(bf->bf_m); 2770 bf->bf_m = NULL; 2771 } 2772 if (bf->bf_node != NULL) { 2773 ieee80211_free_node(bf->bf_node); 2774 bf->bf_node = NULL; 2775 } 2776 } 2777 } 2778 2779 /* 2780 * Configure the beacon and sleep timers. 2781 * 2782 * When operating as an AP this resets the TSF and sets 2783 * up the hardware to notify us when we need to issue beacons. 2784 * 2785 * When operating in station mode this sets up the beacon 2786 * timers according to the timestamp of the last received 2787 * beacon and the current TSF, configures PCF and DTIM 2788 * handling, programs the sleep registers so the hardware 2789 * will wakeup in time to receive beacons, and configures 2790 * the beacon miss handling so we'll receive a BMISS 2791 * interrupt when we stop seeing beacons from the AP 2792 * we've associated with. 2793 */ 2794 static void 2795 ath_beacon_config(struct ath_softc *sc) 2796 { 2797 #define TSF_TO_TU(_h,_l) \ 2798 ((((u_int32_t)(_h)) << 22) | (((u_int32_t)(_l)) >> 10)) 2799 #define FUDGE 2 2800 struct ath_hal *ah = sc->sc_ah; 2801 struct ieee80211com *ic = &sc->sc_ic; 2802 struct ieee80211_node *ni = ic->ic_bss; 2803 u_int32_t nexttbtt, intval, tsftu; 2804 u_int64_t tsf; 2805 2806 /* extract tstamp from last beacon and convert to TU */ 2807 nexttbtt = TSF_TO_TU(LE_READ_4(ni->ni_tstamp.data + 4), 2808 LE_READ_4(ni->ni_tstamp.data)); 2809 /* NB: the beacon interval is kept internally in TU's */ 2810 intval = ni->ni_intval & HAL_BEACON_PERIOD; 2811 if (nexttbtt == 0) /* e.g. for ap mode */ 2812 nexttbtt = intval; 2813 else if (intval) /* NB: can be 0 for monitor mode */ 2814 nexttbtt = roundup(nexttbtt, intval); 2815 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: nexttbtt %u intval %u (%u)\n", 2816 __func__, nexttbtt, intval, ni->ni_intval); 2817 if (ic->ic_opmode == IEEE80211_M_STA) { 2818 HAL_BEACON_STATE bs; 2819 int dtimperiod, dtimcount; 2820 int cfpperiod, cfpcount; 2821 2822 /* 2823 * Setup dtim and cfp parameters according to 2824 * last beacon we received (which may be none). 2825 */ 2826 dtimperiod = ni->ni_dtim_period; 2827 if (dtimperiod <= 0) /* NB: 0 if not known */ 2828 dtimperiod = 1; 2829 dtimcount = ni->ni_dtim_count; 2830 if (dtimcount >= dtimperiod) /* NB: sanity check */ 2831 dtimcount = 0; /* XXX? */ 2832 cfpperiod = 1; /* NB: no PCF support yet */ 2833 cfpcount = 0; 2834 /* 2835 * Pull nexttbtt forward to reflect the current 2836 * TSF and calculate dtim+cfp state for the result. 2837 */ 2838 tsf = ath_hal_gettsf64(ah); 2839 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE; 2840 do { 2841 nexttbtt += intval; 2842 if (--dtimcount < 0) { 2843 dtimcount = dtimperiod - 1; 2844 if (--cfpcount < 0) 2845 cfpcount = cfpperiod - 1; 2846 } 2847 } while (nexttbtt < tsftu); 2848 memset(&bs, 0, sizeof(bs)); 2849 bs.bs_intval = intval; 2850 bs.bs_nexttbtt = nexttbtt; 2851 bs.bs_dtimperiod = dtimperiod*intval; 2852 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval; 2853 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod; 2854 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod; 2855 bs.bs_cfpmaxduration = 0; 2856 #if 0 2857 /* 2858 * The 802.11 layer records the offset to the DTIM 2859 * bitmap while receiving beacons; use it here to 2860 * enable h/w detection of our AID being marked in 2861 * the bitmap vector (to indicate frames for us are 2862 * pending at the AP). 2863 * XXX do DTIM handling in s/w to WAR old h/w bugs 2864 * XXX enable based on h/w rev for newer chips 2865 */ 2866 bs.bs_timoffset = ni->ni_timoff; 2867 #endif 2868 /* 2869 * Calculate the number of consecutive beacons to miss 2870 * before taking a BMISS interrupt. 2871 * Note that we clamp the result to at most 10 beacons. 2872 */ 2873 bs.bs_bmissthreshold = ic->ic_bmissthreshold; 2874 if (bs.bs_bmissthreshold > 10) 2875 bs.bs_bmissthreshold = 10; 2876 else if (bs.bs_bmissthreshold <= 0) 2877 bs.bs_bmissthreshold = 1; 2878 2879 /* 2880 * Calculate sleep duration. The configuration is 2881 * given in ms. We insure a multiple of the beacon 2882 * period is used. Also, if the sleep duration is 2883 * greater than the DTIM period then it makes senses 2884 * to make it a multiple of that. 2885 * 2886 * XXX fixed at 100ms 2887 */ 2888 bs.bs_sleepduration = 2889 roundup(IEEE80211_MS_TO_TU(100), bs.bs_intval); 2890 if (bs.bs_sleepduration > bs.bs_dtimperiod) 2891 bs.bs_sleepduration = roundup(bs.bs_sleepduration, bs.bs_dtimperiod); 2892 2893 DPRINTF(sc, ATH_DEBUG_BEACON, 2894 "%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" 2895 , __func__ 2896 , tsf, tsftu 2897 , bs.bs_intval 2898 , bs.bs_nexttbtt 2899 , bs.bs_dtimperiod 2900 , bs.bs_nextdtim 2901 , bs.bs_bmissthreshold 2902 , bs.bs_sleepduration 2903 , bs.bs_cfpperiod 2904 , bs.bs_cfpmaxduration 2905 , bs.bs_cfpnext 2906 , bs.bs_timoffset 2907 ); 2908 ath_hal_intrset(ah, 0); 2909 ath_hal_beacontimers(ah, &bs); 2910 sc->sc_imask |= HAL_INT_BMISS; 2911 ath_hal_intrset(ah, sc->sc_imask); 2912 } else { 2913 ath_hal_intrset(ah, 0); 2914 if (nexttbtt == intval) 2915 intval |= HAL_BEACON_RESET_TSF; 2916 if (ic->ic_opmode == IEEE80211_M_IBSS) { 2917 /* 2918 * In IBSS mode enable the beacon timers but only 2919 * enable SWBA interrupts if we need to manually 2920 * prepare beacon frames. Otherwise we use a 2921 * self-linked tx descriptor and let the hardware 2922 * deal with things. 2923 */ 2924 intval |= HAL_BEACON_ENA; 2925 if (!sc->sc_hasveol) 2926 sc->sc_imask |= HAL_INT_SWBA; 2927 if ((intval & HAL_BEACON_RESET_TSF) == 0) { 2928 /* 2929 * Pull nexttbtt forward to reflect 2930 * the current TSF. 2931 */ 2932 tsf = ath_hal_gettsf64(ah); 2933 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE; 2934 do { 2935 nexttbtt += intval; 2936 } while (nexttbtt < tsftu); 2937 } 2938 ath_beaconq_config(sc); 2939 } else if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 2940 /* 2941 * In AP mode we enable the beacon timers and 2942 * SWBA interrupts to prepare beacon frames. 2943 */ 2944 intval |= HAL_BEACON_ENA; 2945 sc->sc_imask |= HAL_INT_SWBA; /* beacon prepare */ 2946 ath_beaconq_config(sc); 2947 } 2948 ath_hal_beaconinit(ah, nexttbtt, intval); 2949 sc->sc_bmisscount = 0; 2950 ath_hal_intrset(ah, sc->sc_imask); 2951 /* 2952 * When using a self-linked beacon descriptor in 2953 * ibss mode load it once here. 2954 */ 2955 if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) 2956 ath_beacon_proc(sc, 0); 2957 } 2958 sc->sc_syncbeacon = 0; 2959 #undef FUDGE 2960 #undef TSF_TO_TU 2961 } 2962 2963 static void 2964 ath_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 2965 { 2966 bus_addr_t *paddr = (bus_addr_t*) arg; 2967 KASSERT(error == 0, ("error %u on bus_dma callback", error)); 2968 *paddr = segs->ds_addr; 2969 } 2970 2971 static int 2972 ath_descdma_setup(struct ath_softc *sc, 2973 struct ath_descdma *dd, ath_bufhead *head, 2974 const char *name, int nbuf, int ndesc) 2975 { 2976 #define DS2PHYS(_dd, _ds) \ 2977 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc)) 2978 struct ifnet *ifp = sc->sc_ifp; 2979 struct ath_desc *ds; 2980 struct ath_buf *bf; 2981 int i, bsize, error; 2982 2983 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA: %u buffers %u desc/buf\n", 2984 __func__, name, nbuf, ndesc); 2985 2986 dd->dd_name = name; 2987 dd->dd_desc_len = sizeof(struct ath_desc) * nbuf * ndesc; 2988 2989 /* 2990 * Setup DMA descriptor area. 2991 */ 2992 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), /* parent */ 2993 PAGE_SIZE, 0, /* alignment, bounds */ 2994 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 2995 BUS_SPACE_MAXADDR, /* highaddr */ 2996 NULL, NULL, /* filter, filterarg */ 2997 dd->dd_desc_len, /* maxsize */ 2998 1, /* nsegments */ 2999 dd->dd_desc_len, /* maxsegsize */ 3000 BUS_DMA_ALLOCNOW, /* flags */ 3001 NULL, /* lockfunc */ 3002 NULL, /* lockarg */ 3003 &dd->dd_dmat); 3004 if (error != 0) { 3005 if_printf(ifp, "cannot allocate %s DMA tag\n", dd->dd_name); 3006 return error; 3007 } 3008 3009 /* allocate descriptors */ 3010 error = bus_dmamap_create(dd->dd_dmat, BUS_DMA_NOWAIT, &dd->dd_dmamap); 3011 if (error != 0) { 3012 if_printf(ifp, "unable to create dmamap for %s descriptors, " 3013 "error %u\n", dd->dd_name, error); 3014 goto fail0; 3015 } 3016 3017 error = bus_dmamem_alloc(dd->dd_dmat, (void**) &dd->dd_desc, 3018 BUS_DMA_NOWAIT | BUS_DMA_COHERENT, 3019 &dd->dd_dmamap); 3020 if (error != 0) { 3021 if_printf(ifp, "unable to alloc memory for %u %s descriptors, " 3022 "error %u\n", nbuf * ndesc, dd->dd_name, error); 3023 goto fail1; 3024 } 3025 3026 error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap, 3027 dd->dd_desc, dd->dd_desc_len, 3028 ath_load_cb, &dd->dd_desc_paddr, 3029 BUS_DMA_NOWAIT); 3030 if (error != 0) { 3031 if_printf(ifp, "unable to map %s descriptors, error %u\n", 3032 dd->dd_name, error); 3033 goto fail2; 3034 } 3035 3036 ds = dd->dd_desc; 3037 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA map: %p (%lu) -> %p (%lu)\n", 3038 __func__, dd->dd_name, ds, (u_long) dd->dd_desc_len, 3039 (caddr_t) dd->dd_desc_paddr, /*XXX*/ (u_long) dd->dd_desc_len); 3040 3041 /* allocate rx buffers */ 3042 bsize = sizeof(struct ath_buf) * nbuf; 3043 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO); 3044 if (bf == NULL) { 3045 if_printf(ifp, "malloc of %s buffers failed, size %u\n", 3046 dd->dd_name, bsize); 3047 goto fail3; 3048 } 3049 dd->dd_bufptr = bf; 3050 3051 STAILQ_INIT(head); 3052 for (i = 0; i < nbuf; i++, bf++, ds += ndesc) { 3053 bf->bf_desc = ds; 3054 bf->bf_daddr = DS2PHYS(dd, ds); 3055 error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT, 3056 &bf->bf_dmamap); 3057 if (error != 0) { 3058 if_printf(ifp, "unable to create dmamap for %s " 3059 "buffer %u, error %u\n", dd->dd_name, i, error); 3060 ath_descdma_cleanup(sc, dd, head); 3061 return error; 3062 } 3063 STAILQ_INSERT_TAIL(head, bf, bf_list); 3064 } 3065 return 0; 3066 fail3: 3067 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 3068 fail2: 3069 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); 3070 fail1: 3071 bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap); 3072 fail0: 3073 bus_dma_tag_destroy(dd->dd_dmat); 3074 memset(dd, 0, sizeof(*dd)); 3075 return error; 3076 #undef DS2PHYS 3077 } 3078 3079 static void 3080 ath_descdma_cleanup(struct ath_softc *sc, 3081 struct ath_descdma *dd, ath_bufhead *head) 3082 { 3083 struct ath_buf *bf; 3084 struct ieee80211_node *ni; 3085 3086 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 3087 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); 3088 bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap); 3089 bus_dma_tag_destroy(dd->dd_dmat); 3090 3091 STAILQ_FOREACH(bf, head, bf_list) { 3092 if (bf->bf_m) { 3093 m_freem(bf->bf_m); 3094 bf->bf_m = NULL; 3095 } 3096 if (bf->bf_dmamap != NULL) { 3097 bus_dmamap_destroy(sc->sc_dmat, bf->bf_dmamap); 3098 bf->bf_dmamap = NULL; 3099 } 3100 ni = bf->bf_node; 3101 bf->bf_node = NULL; 3102 if (ni != NULL) { 3103 /* 3104 * Reclaim node reference. 3105 */ 3106 ieee80211_free_node(ni); 3107 } 3108 } 3109 3110 STAILQ_INIT(head); 3111 free(dd->dd_bufptr, M_ATHDEV); 3112 memset(dd, 0, sizeof(*dd)); 3113 } 3114 3115 static int 3116 ath_desc_alloc(struct ath_softc *sc) 3117 { 3118 int error; 3119 3120 error = ath_descdma_setup(sc, &sc->sc_rxdma, &sc->sc_rxbuf, 3121 "rx", ath_rxbuf, 1); 3122 if (error != 0) 3123 return error; 3124 3125 error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf, 3126 "tx", ath_txbuf, ATH_TXDESC); 3127 if (error != 0) { 3128 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 3129 return error; 3130 } 3131 3132 error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf, 3133 "beacon", 1, 1); 3134 if (error != 0) { 3135 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 3136 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 3137 return error; 3138 } 3139 return 0; 3140 } 3141 3142 static void 3143 ath_desc_free(struct ath_softc *sc) 3144 { 3145 3146 if (sc->sc_bdma.dd_desc_len != 0) 3147 ath_descdma_cleanup(sc, &sc->sc_bdma, &sc->sc_bbuf); 3148 if (sc->sc_txdma.dd_desc_len != 0) 3149 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 3150 if (sc->sc_rxdma.dd_desc_len != 0) 3151 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 3152 } 3153 3154 static struct ieee80211_node * 3155 ath_node_alloc(struct ieee80211_node_table *nt) 3156 { 3157 struct ieee80211com *ic = nt->nt_ic; 3158 struct ath_softc *sc = ic->ic_ifp->if_softc; 3159 const size_t space = sizeof(struct ath_node) + sc->sc_rc->arc_space; 3160 struct ath_node *an; 3161 3162 an = malloc(space, M_80211_NODE, M_NOWAIT|M_ZERO); 3163 if (an == NULL) { 3164 /* XXX stat+msg */ 3165 return NULL; 3166 } 3167 an->an_avgrssi = ATH_RSSI_DUMMY_MARKER; 3168 ath_rate_node_init(sc, an); 3169 3170 DPRINTF(sc, ATH_DEBUG_NODE, "%s: an %p\n", __func__, an); 3171 return &an->an_node; 3172 } 3173 3174 static void 3175 ath_node_free(struct ieee80211_node *ni) 3176 { 3177 struct ieee80211com *ic = ni->ni_ic; 3178 struct ath_softc *sc = ic->ic_ifp->if_softc; 3179 3180 DPRINTF(sc, ATH_DEBUG_NODE, "%s: ni %p\n", __func__, ni); 3181 3182 ath_rate_node_cleanup(sc, ATH_NODE(ni)); 3183 sc->sc_node_free(ni); 3184 } 3185 3186 static int8_t 3187 ath_node_getrssi(const struct ieee80211_node *ni) 3188 { 3189 #define HAL_EP_RND(x, mul) \ 3190 ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul)) 3191 u_int32_t avgrssi = ATH_NODE_CONST(ni)->an_avgrssi; 3192 int32_t rssi; 3193 3194 /* 3195 * When only one frame is received there will be no state in 3196 * avgrssi so fallback on the value recorded by the 802.11 layer. 3197 */ 3198 if (avgrssi != ATH_RSSI_DUMMY_MARKER) 3199 rssi = HAL_EP_RND(avgrssi, HAL_RSSI_EP_MULTIPLIER); 3200 else 3201 rssi = ni->ni_rssi; 3202 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 3203 #undef HAL_EP_RND 3204 } 3205 3206 static void 3207 ath_node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 3208 { 3209 struct ieee80211com *ic = ni->ni_ic; 3210 struct ath_softc *sc = ic->ic_ifp->if_softc; 3211 struct ath_hal *ah = sc->sc_ah; 3212 HAL_CHANNEL hchan; 3213 3214 *rssi = ath_node_getrssi(ni); 3215 if (ni->ni_chan != IEEE80211_CHAN_ANYC) { 3216 ath_mapchan(&hchan, ni->ni_chan); 3217 *noise = ath_hal_getchannoise(ah, &hchan); 3218 } else 3219 *noise = -95; /* nominally correct */ 3220 } 3221 3222 static int 3223 ath_rxbuf_init(struct ath_softc *sc, struct ath_buf *bf) 3224 { 3225 struct ath_hal *ah = sc->sc_ah; 3226 int error; 3227 struct mbuf *m; 3228 struct ath_desc *ds; 3229 3230 m = bf->bf_m; 3231 if (m == NULL) { 3232 /* 3233 * NB: by assigning a page to the rx dma buffer we 3234 * implicitly satisfy the Atheros requirement that 3235 * this buffer be cache-line-aligned and sized to be 3236 * multiple of the cache line size. Not doing this 3237 * causes weird stuff to happen (for the 5210 at least). 3238 */ 3239 m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 3240 if (m == NULL) { 3241 DPRINTF(sc, ATH_DEBUG_ANY, 3242 "%s: no mbuf/cluster\n", __func__); 3243 sc->sc_stats.ast_rx_nombuf++; 3244 return ENOMEM; 3245 } 3246 m->m_pkthdr.len = m->m_len = m->m_ext.ext_size; 3247 3248 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, 3249 bf->bf_dmamap, m, 3250 bf->bf_segs, &bf->bf_nseg, 3251 BUS_DMA_NOWAIT); 3252 if (error != 0) { 3253 DPRINTF(sc, ATH_DEBUG_ANY, 3254 "%s: bus_dmamap_load_mbuf_sg failed; error %d\n", 3255 __func__, error); 3256 sc->sc_stats.ast_rx_busdma++; 3257 m_freem(m); 3258 return error; 3259 } 3260 KASSERT(bf->bf_nseg == 1, 3261 ("multi-segment packet; nseg %u", bf->bf_nseg)); 3262 bf->bf_m = m; 3263 } 3264 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREREAD); 3265 3266 /* 3267 * Setup descriptors. For receive we always terminate 3268 * the descriptor list with a self-linked entry so we'll 3269 * not get overrun under high load (as can happen with a 3270 * 5212 when ANI processing enables PHY error frames). 3271 * 3272 * To insure the last descriptor is self-linked we create 3273 * each descriptor as self-linked and add it to the end. As 3274 * each additional descriptor is added the previous self-linked 3275 * entry is ``fixed'' naturally. This should be safe even 3276 * if DMA is happening. When processing RX interrupts we 3277 * never remove/process the last, self-linked, entry on the 3278 * descriptor list. This insures the hardware always has 3279 * someplace to write a new frame. 3280 */ 3281 ds = bf->bf_desc; 3282 ds->ds_link = bf->bf_daddr; /* link to self */ 3283 ds->ds_data = bf->bf_segs[0].ds_addr; 3284 ath_hal_setuprxdesc(ah, ds 3285 , m->m_len /* buffer size */ 3286 , 0 3287 ); 3288 3289 if (sc->sc_rxlink != NULL) 3290 *sc->sc_rxlink = bf->bf_daddr; 3291 sc->sc_rxlink = &ds->ds_link; 3292 return 0; 3293 } 3294 3295 /* 3296 * Extend 15-bit time stamp from rx descriptor to 3297 * a full 64-bit TSF using the specified TSF. 3298 */ 3299 static __inline u_int64_t 3300 ath_extend_tsf(u_int32_t rstamp, u_int64_t tsf) 3301 { 3302 if ((tsf & 0x7fff) < rstamp) 3303 tsf -= 0x8000; 3304 return ((tsf &~ 0x7fff) | rstamp); 3305 } 3306 3307 /* 3308 * Intercept management frames to collect beacon rssi data 3309 * and to do ibss merges. 3310 */ 3311 static void 3312 ath_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 3313 struct ieee80211_node *ni, 3314 int subtype, int rssi, int noise, u_int32_t rstamp) 3315 { 3316 struct ath_softc *sc = ic->ic_ifp->if_softc; 3317 3318 /* 3319 * Call up first so subsequent work can use information 3320 * potentially stored in the node (e.g. for ibss merge). 3321 */ 3322 sc->sc_recv_mgmt(ic, m, ni, subtype, rssi, noise, rstamp); 3323 switch (subtype) { 3324 case IEEE80211_FC0_SUBTYPE_BEACON: 3325 /* update rssi statistics for use by the hal */ 3326 ATH_RSSI_LPF(sc->sc_halstats.ns_avgbrssi, rssi); 3327 if (sc->sc_syncbeacon && 3328 ni == ic->ic_bss && ic->ic_state == IEEE80211_S_RUN) { 3329 /* 3330 * Resync beacon timers using the tsf of the beacon 3331 * frame we just received. 3332 */ 3333 ath_beacon_config(sc); 3334 } 3335 /* fall thru... */ 3336 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 3337 if (ic->ic_opmode == IEEE80211_M_IBSS && 3338 ic->ic_state == IEEE80211_S_RUN) { 3339 u_int64_t tsf = ath_extend_tsf(rstamp, 3340 ath_hal_gettsf64(sc->sc_ah)); 3341 /* 3342 * Handle ibss merge as needed; check the tsf on the 3343 * frame before attempting the merge. The 802.11 spec 3344 * says the station should change it's bssid to match 3345 * the oldest station with the same ssid, where oldest 3346 * is determined by the tsf. Note that hardware 3347 * reconfiguration happens through callback to 3348 * ath_newstate as the state machine will go from 3349 * RUN -> RUN when this happens. 3350 */ 3351 if (le64toh(ni->ni_tstamp.tsf) >= tsf) { 3352 DPRINTF(sc, ATH_DEBUG_STATE, 3353 "ibss merge, rstamp %u tsf %ju " 3354 "tstamp %ju\n", rstamp, (uintmax_t)tsf, 3355 (uintmax_t)ni->ni_tstamp.tsf); 3356 (void) ieee80211_ibss_merge(ni); 3357 } 3358 } 3359 break; 3360 } 3361 } 3362 3363 /* 3364 * Set the default antenna. 3365 */ 3366 static void 3367 ath_setdefantenna(struct ath_softc *sc, u_int antenna) 3368 { 3369 struct ath_hal *ah = sc->sc_ah; 3370 3371 /* XXX block beacon interrupts */ 3372 ath_hal_setdefantenna(ah, antenna); 3373 if (sc->sc_defant != antenna) 3374 sc->sc_stats.ast_ant_defswitch++; 3375 sc->sc_defant = antenna; 3376 sc->sc_rxotherant = 0; 3377 } 3378 3379 static int 3380 ath_rx_tap(struct ath_softc *sc, struct mbuf *m, 3381 const struct ath_rx_status *rs, u_int64_t tsf, int16_t nf) 3382 { 3383 #define CHANNEL_HT (CHANNEL_HT20|CHANNEL_HT40PLUS|CHANNEL_HT40MINUS) 3384 u_int8_t rix; 3385 3386 KASSERT(sc->sc_drvbpf != NULL, ("no tap")); 3387 3388 /* 3389 * Discard anything shorter than an ack or cts. 3390 */ 3391 if (m->m_pkthdr.len < IEEE80211_ACK_LEN) { 3392 DPRINTF(sc, ATH_DEBUG_RECV, "%s: runt packet %d\n", 3393 __func__, m->m_pkthdr.len); 3394 sc->sc_stats.ast_rx_tooshort++; 3395 return 0; 3396 } 3397 rix = rs->rs_rate; 3398 sc->sc_rx_th.wr_rate = sc->sc_hwmap[rix].ieeerate; 3399 sc->sc_rx_th.wr_flags = sc->sc_hwmap[rix].rxflags; 3400 #if HAL_ABI_VERSION >= 0x07050400 3401 if (sc->sc_curchan.channelFlags & CHANNEL_HT) { 3402 /* 3403 * For HT operation we must specify the channel 3404 * attributes for each packet since they vary. 3405 * We deduce this by from HT40 bit in the rx 3406 * status and the MCS/legacy rate bit. 3407 */ 3408 sc->sc_rx_th.wr_chan_flags &= ~IEEE80211_CHAN_HT; 3409 if (sc->sc_rx_th.wr_rate & 0x80) { /* HT rate */ 3410 /* XXX 40U/40D */ 3411 sc->sc_rx_th.wr_chan_flags |= 3412 (rs->rs_flags & HAL_RX_2040) ? 3413 IEEE80211_CHAN_HT40U : IEEE80211_CHAN_HT20; 3414 if ((rs->rs_flags & HAL_RX_GI) == 0) 3415 sc->sc_rx_th.wr_flags |= 3416 IEEE80211_RADIOTAP_F_SHORTGI; 3417 } 3418 } 3419 #endif 3420 sc->sc_rx_th.wr_tsf = htole64(ath_extend_tsf(rs->rs_tstamp, tsf)); 3421 if (rs->rs_status & HAL_RXERR_CRC) 3422 sc->sc_rx_th.wr_flags |= IEEE80211_RADIOTAP_F_BADFCS; 3423 /* XXX propagate other error flags from descriptor */ 3424 sc->sc_rx_th.wr_antsignal = rs->rs_rssi + nf; 3425 sc->sc_rx_th.wr_antnoise = nf; 3426 sc->sc_rx_th.wr_antenna = rs->rs_antenna; 3427 3428 bpf_mtap2(sc->sc_drvbpf, &sc->sc_rx_th, sc->sc_rx_th_len, m); 3429 3430 return 1; 3431 #undef CHANNEL_HT 3432 } 3433 3434 static void 3435 ath_rx_proc(void *arg, int npending) 3436 { 3437 #define PA2DESC(_sc, _pa) \ 3438 ((struct ath_desc *)((caddr_t)(_sc)->sc_rxdma.dd_desc + \ 3439 ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr))) 3440 struct ath_softc *sc = arg; 3441 struct ath_buf *bf; 3442 struct ieee80211com *ic = &sc->sc_ic; 3443 struct ifnet *ifp = sc->sc_ifp; 3444 struct ath_hal *ah = sc->sc_ah; 3445 struct ath_desc *ds; 3446 struct ath_rx_status *rs; 3447 struct mbuf *m; 3448 struct ieee80211_node *ni; 3449 struct ath_node *an; 3450 int len, type, ngood; 3451 u_int phyerr; 3452 HAL_STATUS status; 3453 int16_t nf; 3454 u_int64_t tsf; 3455 3456 3457 DPRINTF(sc, ATH_DEBUG_RX_PROC, "%s: pending %u\n", __func__, npending); 3458 ngood = 0; 3459 nf = ath_hal_getchannoise(ah, &sc->sc_curchan); 3460 tsf = ath_hal_gettsf64(ah); 3461 do { 3462 bf = STAILQ_FIRST(&sc->sc_rxbuf); 3463 if (bf == NULL) { /* NB: shouldn't happen */ 3464 if_printf(ifp, "%s: no buffer!\n", __func__); 3465 break; 3466 } 3467 m = bf->bf_m; 3468 if (m == NULL) { /* NB: shouldn't happen */ 3469 /* 3470 * If mbuf allocation failed previously there 3471 * will be no mbuf; try again to re-populate it. 3472 */ 3473 /* XXX make debug msg */ 3474 if_printf(ifp, "%s: no mbuf!\n", __func__); 3475 STAILQ_REMOVE_HEAD(&sc->sc_rxbuf, bf_list); 3476 goto rx_next; 3477 } 3478 ds = bf->bf_desc; 3479 if (ds->ds_link == bf->bf_daddr) { 3480 /* NB: never process the self-linked entry at the end */ 3481 break; 3482 } 3483 /* XXX sync descriptor memory */ 3484 /* 3485 * Must provide the virtual address of the current 3486 * descriptor, the physical address, and the virtual 3487 * address of the next descriptor in the h/w chain. 3488 * This allows the HAL to look ahead to see if the 3489 * hardware is done with a descriptor by checking the 3490 * done bit in the following descriptor and the address 3491 * of the current descriptor the DMA engine is working 3492 * on. All this is necessary because of our use of 3493 * a self-linked list to avoid rx overruns. 3494 */ 3495 rs = &bf->bf_status.ds_rxstat; 3496 status = ath_hal_rxprocdesc(ah, ds, 3497 bf->bf_daddr, PA2DESC(sc, ds->ds_link), rs); 3498 #ifdef ATH_DEBUG 3499 if (sc->sc_debug & ATH_DEBUG_RECV_DESC) 3500 ath_printrxbuf(bf, 0, status == HAL_OK); 3501 #endif 3502 if (status == HAL_EINPROGRESS) 3503 break; 3504 STAILQ_REMOVE_HEAD(&sc->sc_rxbuf, bf_list); 3505 if (rs->rs_status != 0) { 3506 if (rs->rs_status & HAL_RXERR_CRC) 3507 sc->sc_stats.ast_rx_crcerr++; 3508 if (rs->rs_status & HAL_RXERR_FIFO) 3509 sc->sc_stats.ast_rx_fifoerr++; 3510 if (rs->rs_status & HAL_RXERR_PHY) { 3511 sc->sc_stats.ast_rx_phyerr++; 3512 phyerr = rs->rs_phyerr & 0x1f; 3513 sc->sc_stats.ast_rx_phy[phyerr]++; 3514 goto rx_error; /* NB: don't count in ierrors */ 3515 } 3516 if (rs->rs_status & HAL_RXERR_DECRYPT) { 3517 /* 3518 * Decrypt error. If the error occurred 3519 * because there was no hardware key, then 3520 * let the frame through so the upper layers 3521 * can process it. This is necessary for 5210 3522 * parts which have no way to setup a ``clear'' 3523 * key cache entry. 3524 * 3525 * XXX do key cache faulting 3526 */ 3527 if (rs->rs_keyix == HAL_RXKEYIX_INVALID) 3528 goto rx_accept; 3529 sc->sc_stats.ast_rx_badcrypt++; 3530 } 3531 if (rs->rs_status & HAL_RXERR_MIC) { 3532 sc->sc_stats.ast_rx_badmic++; 3533 /* 3534 * Do minimal work required to hand off 3535 * the 802.11 header for notifcation. 3536 */ 3537 /* XXX frag's and qos frames */ 3538 len = rs->rs_datalen; 3539 if (len >= sizeof (struct ieee80211_frame)) { 3540 bus_dmamap_sync(sc->sc_dmat, 3541 bf->bf_dmamap, 3542 BUS_DMASYNC_POSTREAD); 3543 ieee80211_notify_michael_failure(ic, 3544 mtod(m, struct ieee80211_frame *), 3545 sc->sc_splitmic ? 3546 rs->rs_keyix-32 : rs->rs_keyix 3547 ); 3548 } 3549 } 3550 ifp->if_ierrors++; 3551 rx_error: 3552 /* 3553 * Cleanup any pending partial frame. 3554 */ 3555 if (sc->sc_rxpending != NULL) { 3556 m_freem(sc->sc_rxpending); 3557 sc->sc_rxpending = NULL; 3558 } 3559 /* 3560 * When a tap is present pass error frames 3561 * that have been requested. By default we 3562 * pass decrypt+mic errors but others may be 3563 * interesting (e.g. crc). 3564 */ 3565 if (bpf_peers_present(sc->sc_drvbpf) && 3566 (rs->rs_status & sc->sc_monpass)) { 3567 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3568 BUS_DMASYNC_POSTREAD); 3569 /* NB: bpf needs the mbuf length setup */ 3570 len = rs->rs_datalen; 3571 m->m_pkthdr.len = m->m_len = len; 3572 (void) ath_rx_tap(sc, m, rs, tsf, nf); 3573 } 3574 /* XXX pass MIC errors up for s/w reclaculation */ 3575 goto rx_next; 3576 } 3577 rx_accept: 3578 /* 3579 * Sync and unmap the frame. At this point we're 3580 * committed to passing the mbuf somewhere so clear 3581 * bf_m; this means a new mbuf must be allocated 3582 * when the rx descriptor is setup again to receive 3583 * another frame. 3584 */ 3585 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3586 BUS_DMASYNC_POSTREAD); 3587 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 3588 bf->bf_m = NULL; 3589 3590 len = rs->rs_datalen; 3591 m->m_len = len; 3592 3593 if (rs->rs_more) { 3594 /* 3595 * Frame spans multiple descriptors; save 3596 * it for the next completed descriptor, it 3597 * will be used to construct a jumbogram. 3598 */ 3599 if (sc->sc_rxpending != NULL) { 3600 /* NB: max frame size is currently 2 clusters */ 3601 sc->sc_stats.ast_rx_toobig++; 3602 m_freem(sc->sc_rxpending); 3603 } 3604 m->m_pkthdr.rcvif = ifp; 3605 m->m_pkthdr.len = len; 3606 sc->sc_rxpending = m; 3607 goto rx_next; 3608 } else if (sc->sc_rxpending != NULL) { 3609 /* 3610 * This is the second part of a jumbogram, 3611 * chain it to the first mbuf, adjust the 3612 * frame length, and clear the rxpending state. 3613 */ 3614 sc->sc_rxpending->m_next = m; 3615 sc->sc_rxpending->m_pkthdr.len += len; 3616 m = sc->sc_rxpending; 3617 sc->sc_rxpending = NULL; 3618 } else { 3619 /* 3620 * Normal single-descriptor receive; setup 3621 * the rcvif and packet length. 3622 */ 3623 m->m_pkthdr.rcvif = ifp; 3624 m->m_pkthdr.len = len; 3625 } 3626 3627 sc->sc_stats.ast_ant_rx[rs->rs_antenna]++; 3628 3629 if (bpf_peers_present(sc->sc_drvbpf) && 3630 !ath_rx_tap(sc, m, rs, tsf, nf)) { 3631 m_freem(m); /* XXX reclaim */ 3632 goto rx_next; 3633 } 3634 3635 /* 3636 * From this point on we assume the frame is at least 3637 * as large as ieee80211_frame_min; verify that. 3638 */ 3639 if (len < IEEE80211_MIN_LEN) { 3640 DPRINTF(sc, ATH_DEBUG_RECV, "%s: short packet %d\n", 3641 __func__, len); 3642 sc->sc_stats.ast_rx_tooshort++; 3643 m_freem(m); 3644 goto rx_next; 3645 } 3646 3647 if (IFF_DUMPPKTS(sc, ATH_DEBUG_RECV)) { 3648 ieee80211_dump_pkt(ic, mtod(m, caddr_t), len, 3649 sc->sc_hwmap[rs->rs_rate].ieeerate, 3650 rs->rs_rssi); 3651 } 3652 3653 m_adj(m, -IEEE80211_CRC_LEN); 3654 3655 /* 3656 * Locate the node for sender, track state, and then 3657 * pass the (referenced) node up to the 802.11 layer 3658 * for its use. 3659 */ 3660 ni = ieee80211_find_rxnode_withkey(ic, 3661 mtod(m, const struct ieee80211_frame_min *), 3662 rs->rs_keyix == HAL_RXKEYIX_INVALID ? 3663 IEEE80211_KEYIX_NONE : rs->rs_keyix); 3664 /* 3665 * Track rx rssi and do any rx antenna management. 3666 */ 3667 an = ATH_NODE(ni); 3668 ATH_RSSI_LPF(an->an_avgrssi, rs->rs_rssi); 3669 ATH_RSSI_LPF(sc->sc_halstats.ns_avgrssi, rs->rs_rssi); 3670 /* 3671 * Send frame up for processing. 3672 */ 3673 type = ieee80211_input(ic, m, ni, 3674 rs->rs_rssi, nf, rs->rs_tstamp); 3675 ieee80211_free_node(ni); 3676 if (sc->sc_diversity) { 3677 /* 3678 * When using fast diversity, change the default rx 3679 * antenna if diversity chooses the other antenna 3 3680 * times in a row. 3681 */ 3682 if (sc->sc_defant != rs->rs_antenna) { 3683 if (++sc->sc_rxotherant >= 3) 3684 ath_setdefantenna(sc, rs->rs_antenna); 3685 } else 3686 sc->sc_rxotherant = 0; 3687 } 3688 if (sc->sc_softled) { 3689 /* 3690 * Blink for any data frame. Otherwise do a 3691 * heartbeat-style blink when idle. The latter 3692 * is mainly for station mode where we depend on 3693 * periodic beacon frames to trigger the poll event. 3694 */ 3695 if (type == IEEE80211_FC0_TYPE_DATA) { 3696 sc->sc_rxrate = rs->rs_rate; 3697 ath_led_event(sc, ATH_LED_RX); 3698 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle) 3699 ath_led_event(sc, ATH_LED_POLL); 3700 } 3701 /* 3702 * Arrange to update the last rx timestamp only for 3703 * frames from our ap when operating in station mode. 3704 * This assumes the rx key is always setup when associated. 3705 */ 3706 if (ic->ic_opmode == IEEE80211_M_STA && 3707 rs->rs_keyix != HAL_RXKEYIX_INVALID) 3708 ngood++; 3709 rx_next: 3710 STAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list); 3711 } while (ath_rxbuf_init(sc, bf) == 0); 3712 3713 /* rx signal state monitoring */ 3714 ath_hal_rxmonitor(ah, &sc->sc_halstats, &sc->sc_curchan); 3715 if (ngood) 3716 sc->sc_lastrx = tsf; 3717 3718 /* NB: may want to check mgtq too */ 3719 if ((ifp->if_drv_flags & IFF_DRV_OACTIVE) == 0 && 3720 !IFQ_IS_EMPTY(&ifp->if_snd)) 3721 ath_start(ifp); 3722 3723 #undef PA2DESC 3724 } 3725 3726 static void 3727 ath_txq_init(struct ath_softc *sc, struct ath_txq *txq, int qnum) 3728 { 3729 txq->axq_qnum = qnum; 3730 txq->axq_depth = 0; 3731 txq->axq_intrcnt = 0; 3732 txq->axq_link = NULL; 3733 STAILQ_INIT(&txq->axq_q); 3734 ATH_TXQ_LOCK_INIT(sc, txq); 3735 TAILQ_INIT(&txq->axq_stageq); 3736 txq->axq_curage = 0; 3737 } 3738 3739 /* 3740 * Setup a h/w transmit queue. 3741 */ 3742 static struct ath_txq * 3743 ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) 3744 { 3745 #define N(a) (sizeof(a)/sizeof(a[0])) 3746 struct ath_hal *ah = sc->sc_ah; 3747 HAL_TXQ_INFO qi; 3748 int qnum; 3749 3750 memset(&qi, 0, sizeof(qi)); 3751 qi.tqi_subtype = subtype; 3752 qi.tqi_aifs = HAL_TXQ_USEDEFAULT; 3753 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; 3754 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; 3755 /* 3756 * Enable interrupts only for EOL and DESC conditions. 3757 * We mark tx descriptors to receive a DESC interrupt 3758 * when a tx queue gets deep; otherwise waiting for the 3759 * EOL to reap descriptors. Note that this is done to 3760 * reduce interrupt load and this only defers reaping 3761 * descriptors, never transmitting frames. Aside from 3762 * reducing interrupts this also permits more concurrency. 3763 * The only potential downside is if the tx queue backs 3764 * up in which case the top half of the kernel may backup 3765 * due to a lack of tx descriptors. 3766 */ 3767 qi.tqi_qflags = HAL_TXQ_TXEOLINT_ENABLE | HAL_TXQ_TXDESCINT_ENABLE; 3768 qnum = ath_hal_setuptxqueue(ah, qtype, &qi); 3769 if (qnum == -1) { 3770 /* 3771 * NB: don't print a message, this happens 3772 * normally on parts with too few tx queues 3773 */ 3774 return NULL; 3775 } 3776 if (qnum >= N(sc->sc_txq)) { 3777 device_printf(sc->sc_dev, 3778 "hal qnum %u out of range, max %zu!\n", 3779 qnum, N(sc->sc_txq)); 3780 ath_hal_releasetxqueue(ah, qnum); 3781 return NULL; 3782 } 3783 if (!ATH_TXQ_SETUP(sc, qnum)) { 3784 ath_txq_init(sc, &sc->sc_txq[qnum], qnum); 3785 sc->sc_txqsetup |= 1<<qnum; 3786 } 3787 return &sc->sc_txq[qnum]; 3788 #undef N 3789 } 3790 3791 /* 3792 * Setup a hardware data transmit queue for the specified 3793 * access control. The hal may not support all requested 3794 * queues in which case it will return a reference to a 3795 * previously setup queue. We record the mapping from ac's 3796 * to h/w queues for use by ath_tx_start and also track 3797 * the set of h/w queues being used to optimize work in the 3798 * transmit interrupt handler and related routines. 3799 */ 3800 static int 3801 ath_tx_setup(struct ath_softc *sc, int ac, int haltype) 3802 { 3803 #define N(a) (sizeof(a)/sizeof(a[0])) 3804 struct ath_txq *txq; 3805 3806 if (ac >= N(sc->sc_ac2q)) { 3807 device_printf(sc->sc_dev, "AC %u out of range, max %zu!\n", 3808 ac, N(sc->sc_ac2q)); 3809 return 0; 3810 } 3811 txq = ath_txq_setup(sc, HAL_TX_QUEUE_DATA, haltype); 3812 if (txq != NULL) { 3813 sc->sc_ac2q[ac] = txq; 3814 return 1; 3815 } else 3816 return 0; 3817 #undef N 3818 } 3819 3820 /* 3821 * Update WME parameters for a transmit queue. 3822 */ 3823 static int 3824 ath_txq_update(struct ath_softc *sc, int ac) 3825 { 3826 #define ATH_EXPONENT_TO_VALUE(v) ((1<<v)-1) 3827 #define ATH_TXOP_TO_US(v) (v<<5) 3828 struct ieee80211com *ic = &sc->sc_ic; 3829 struct ath_txq *txq = sc->sc_ac2q[ac]; 3830 struct wmeParams *wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 3831 struct ath_hal *ah = sc->sc_ah; 3832 HAL_TXQ_INFO qi; 3833 3834 ath_hal_gettxqueueprops(ah, txq->axq_qnum, &qi); 3835 qi.tqi_aifs = wmep->wmep_aifsn; 3836 qi.tqi_cwmin = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); 3837 qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); 3838 qi.tqi_burstTime = ATH_TXOP_TO_US(wmep->wmep_txopLimit); 3839 3840 if (!ath_hal_settxqueueprops(ah, txq->axq_qnum, &qi)) { 3841 device_printf(sc->sc_dev, "unable to update hardware queue " 3842 "parameters for %s traffic!\n", 3843 ieee80211_wme_acnames[ac]); 3844 return 0; 3845 } else { 3846 ath_hal_resettxqueue(ah, txq->axq_qnum); /* push to h/w */ 3847 return 1; 3848 } 3849 #undef ATH_TXOP_TO_US 3850 #undef ATH_EXPONENT_TO_VALUE 3851 } 3852 3853 /* 3854 * Callback from the 802.11 layer to update WME parameters. 3855 */ 3856 static int 3857 ath_wme_update(struct ieee80211com *ic) 3858 { 3859 struct ath_softc *sc = ic->ic_ifp->if_softc; 3860 3861 return !ath_txq_update(sc, WME_AC_BE) || 3862 !ath_txq_update(sc, WME_AC_BK) || 3863 !ath_txq_update(sc, WME_AC_VI) || 3864 !ath_txq_update(sc, WME_AC_VO) ? EIO : 0; 3865 } 3866 3867 /* 3868 * Reclaim resources for a setup queue. 3869 */ 3870 static void 3871 ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) 3872 { 3873 3874 ath_hal_releasetxqueue(sc->sc_ah, txq->axq_qnum); 3875 ATH_TXQ_LOCK_DESTROY(txq); 3876 sc->sc_txqsetup &= ~(1<<txq->axq_qnum); 3877 } 3878 3879 /* 3880 * Reclaim all tx queue resources. 3881 */ 3882 static void 3883 ath_tx_cleanup(struct ath_softc *sc) 3884 { 3885 int i; 3886 3887 ATH_TXBUF_LOCK_DESTROY(sc); 3888 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 3889 if (ATH_TXQ_SETUP(sc, i)) 3890 ath_tx_cleanupq(sc, &sc->sc_txq[i]); 3891 ATH_TXQ_LOCK_DESTROY(&sc->sc_mcastq); 3892 } 3893 3894 /* 3895 * Return h/w rate index for an IEEE rate (w/o basic rate bit). 3896 */ 3897 static int 3898 ath_tx_findrix(const HAL_RATE_TABLE *rt, int rate) 3899 { 3900 int i; 3901 3902 for (i = 0; i < rt->rateCount; i++) 3903 if ((rt->info[i].dot11Rate & IEEE80211_RATE_VAL) == rate) 3904 return i; 3905 return 0; /* NB: lowest rate */ 3906 } 3907 3908 /* 3909 * Reclaim mbuf resources. For fragmented frames we 3910 * need to claim each frag chained with m_nextpkt. 3911 */ 3912 static void 3913 ath_freetx(struct mbuf *m) 3914 { 3915 struct mbuf *next; 3916 3917 do { 3918 next = m->m_nextpkt; 3919 m->m_nextpkt = NULL; 3920 m_freem(m); 3921 } while ((m = next) != NULL); 3922 } 3923 3924 static int 3925 ath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0) 3926 { 3927 struct mbuf *m; 3928 int error; 3929 3930 /* 3931 * Load the DMA map so any coalescing is done. This 3932 * also calculates the number of descriptors we need. 3933 */ 3934 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 3935 bf->bf_segs, &bf->bf_nseg, 3936 BUS_DMA_NOWAIT); 3937 if (error == EFBIG) { 3938 /* XXX packet requires too many descriptors */ 3939 bf->bf_nseg = ATH_TXDESC+1; 3940 } else if (error != 0) { 3941 sc->sc_stats.ast_tx_busdma++; 3942 ath_freetx(m0); 3943 return error; 3944 } 3945 /* 3946 * Discard null packets and check for packets that 3947 * require too many TX descriptors. We try to convert 3948 * the latter to a cluster. 3949 */ 3950 if (bf->bf_nseg > ATH_TXDESC) { /* too many desc's, linearize */ 3951 sc->sc_stats.ast_tx_linear++; 3952 m = m_collapse(m0, M_DONTWAIT, ATH_TXDESC); 3953 if (m == NULL) { 3954 ath_freetx(m0); 3955 sc->sc_stats.ast_tx_nombuf++; 3956 return ENOMEM; 3957 } 3958 m0 = m; 3959 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 3960 bf->bf_segs, &bf->bf_nseg, 3961 BUS_DMA_NOWAIT); 3962 if (error != 0) { 3963 sc->sc_stats.ast_tx_busdma++; 3964 ath_freetx(m0); 3965 return error; 3966 } 3967 KASSERT(bf->bf_nseg <= ATH_TXDESC, 3968 ("too many segments after defrag; nseg %u", bf->bf_nseg)); 3969 } else if (bf->bf_nseg == 0) { /* null packet, discard */ 3970 sc->sc_stats.ast_tx_nodata++; 3971 ath_freetx(m0); 3972 return EIO; 3973 } 3974 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", 3975 __func__, m0, m0->m_pkthdr.len); 3976 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 3977 bf->bf_m = m0; 3978 3979 return 0; 3980 } 3981 3982 static void 3983 ath_tx_handoff(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf) 3984 { 3985 struct ath_hal *ah = sc->sc_ah; 3986 struct ath_desc *ds, *ds0; 3987 int i; 3988 3989 /* 3990 * Fillin the remainder of the descriptor info. 3991 */ 3992 ds0 = ds = bf->bf_desc; 3993 for (i = 0; i < bf->bf_nseg; i++, ds++) { 3994 ds->ds_data = bf->bf_segs[i].ds_addr; 3995 if (i == bf->bf_nseg - 1) 3996 ds->ds_link = 0; 3997 else 3998 ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 3999 ath_hal_filltxdesc(ah, ds 4000 , bf->bf_segs[i].ds_len /* segment length */ 4001 , i == 0 /* first segment */ 4002 , i == bf->bf_nseg - 1 /* last segment */ 4003 , ds0 /* first descriptor */ 4004 ); 4005 DPRINTF(sc, ATH_DEBUG_XMIT, 4006 "%s: %d: %08x %08x %08x %08x %08x %08x\n", 4007 __func__, i, ds->ds_link, ds->ds_data, 4008 ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 4009 } 4010 /* 4011 * Insert the frame on the outbound list and pass it on 4012 * to the hardware. Multicast frames buffered for power 4013 * save stations and transmit from the CAB queue are stored 4014 * on a s/w only queue and loaded on to the CAB queue in 4015 * the SWBA handler since frames only go out on DTIM and 4016 * to avoid possible races. 4017 */ 4018 ATH_TXQ_LOCK(txq); 4019 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 4020 if (txq != &sc->sc_mcastq) { 4021 if (txq->axq_link == NULL) { 4022 ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 4023 DPRINTF(sc, ATH_DEBUG_XMIT, 4024 "%s: TXDP[%u] = %p (%p) depth %d\n", __func__, 4025 txq->axq_qnum, (caddr_t)bf->bf_daddr, bf->bf_desc, 4026 txq->axq_depth); 4027 } else { 4028 *txq->axq_link = bf->bf_daddr; 4029 DPRINTF(sc, ATH_DEBUG_XMIT, 4030 "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 4031 txq->axq_qnum, txq->axq_link, 4032 (caddr_t)bf->bf_daddr, bf->bf_desc, txq->axq_depth); 4033 } 4034 txq->axq_link = &bf->bf_desc[bf->bf_nseg - 1].ds_link; 4035 ath_hal_txstart(ah, txq->axq_qnum); 4036 } else { 4037 if (txq->axq_link != NULL) 4038 *txq->axq_link = bf->bf_daddr; 4039 txq->axq_link = &bf->bf_desc[bf->bf_nseg - 1].ds_link; 4040 } 4041 ATH_TXQ_UNLOCK(txq); 4042 } 4043 4044 static int 4045 ath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_buf *bf, 4046 struct mbuf *m0) 4047 { 4048 struct ieee80211com *ic = &sc->sc_ic; 4049 struct ath_hal *ah = sc->sc_ah; 4050 struct ifnet *ifp = sc->sc_ifp; 4051 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 4052 int error, iswep, ismcast, isfrag, ismrr; 4053 int keyix, hdrlen, pktlen, try0; 4054 u_int8_t rix, txrate, ctsrate; 4055 u_int8_t cix = 0xff; /* NB: silence compiler */ 4056 struct ath_desc *ds; 4057 struct ath_txq *txq; 4058 struct ieee80211_frame *wh; 4059 u_int subtype, flags, ctsduration; 4060 HAL_PKT_TYPE atype; 4061 const HAL_RATE_TABLE *rt; 4062 HAL_BOOL shortPreamble; 4063 struct ath_node *an; 4064 u_int pri; 4065 4066 wh = mtod(m0, struct ieee80211_frame *); 4067 iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 4068 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 4069 isfrag = m0->m_flags & M_FRAG; 4070 hdrlen = ieee80211_anyhdrsize(wh); 4071 /* 4072 * Packet length must not include any 4073 * pad bytes; deduct them here. 4074 */ 4075 pktlen = m0->m_pkthdr.len - (hdrlen & 3); 4076 4077 if (iswep) { 4078 const struct ieee80211_cipher *cip; 4079 struct ieee80211_key *k; 4080 4081 /* 4082 * Construct the 802.11 header+trailer for an encrypted 4083 * frame. The only reason this can fail is because of an 4084 * unknown or unsupported cipher/key type. 4085 */ 4086 k = ieee80211_crypto_encap(ic, ni, m0); 4087 if (k == NULL) { 4088 /* 4089 * This can happen when the key is yanked after the 4090 * frame was queued. Just discard the frame; the 4091 * 802.11 layer counts failures and provides 4092 * debugging/diagnostics. 4093 */ 4094 ath_freetx(m0); 4095 return EIO; 4096 } 4097 /* 4098 * Adjust the packet + header lengths for the crypto 4099 * additions and calculate the h/w key index. When 4100 * a s/w mic is done the frame will have had any mic 4101 * added to it prior to entry so m0->m_pkthdr.len will 4102 * account for it. Otherwise we need to add it to the 4103 * packet length. 4104 */ 4105 cip = k->wk_cipher; 4106 hdrlen += cip->ic_header; 4107 pktlen += cip->ic_header + cip->ic_trailer; 4108 /* NB: frags always have any TKIP MIC done in s/w */ 4109 if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 4110 pktlen += cip->ic_miclen; 4111 keyix = k->wk_keyix; 4112 4113 /* packet header may have moved, reset our local pointer */ 4114 wh = mtod(m0, struct ieee80211_frame *); 4115 } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 4116 /* 4117 * Use station key cache slot, if assigned. 4118 */ 4119 keyix = ni->ni_ucastkey.wk_keyix; 4120 if (keyix == IEEE80211_KEYIX_NONE) 4121 keyix = HAL_TXKEYIX_INVALID; 4122 } else 4123 keyix = HAL_TXKEYIX_INVALID; 4124 4125 pktlen += IEEE80211_CRC_LEN; 4126 4127 /* 4128 * Load the DMA map so any coalescing is done. This 4129 * also calculates the number of descriptors we need. 4130 */ 4131 error = ath_tx_dmasetup(sc, bf, m0); 4132 if (error != 0) 4133 return error; 4134 bf->bf_node = ni; /* NB: held reference */ 4135 m0 = bf->bf_m; /* NB: may have changed */ 4136 wh = mtod(m0, struct ieee80211_frame *); 4137 4138 /* setup descriptors */ 4139 ds = bf->bf_desc; 4140 rt = sc->sc_currates; 4141 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 4142 4143 /* 4144 * NB: the 802.11 layer marks whether or not we should 4145 * use short preamble based on the current mode and 4146 * negotiated parameters. 4147 */ 4148 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 4149 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 4150 shortPreamble = AH_TRUE; 4151 sc->sc_stats.ast_tx_shortpre++; 4152 } else { 4153 shortPreamble = AH_FALSE; 4154 } 4155 4156 an = ATH_NODE(ni); 4157 flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 4158 ismrr = 0; /* default no multi-rate retry*/ 4159 /* 4160 * Calculate Atheros packet type from IEEE80211 packet header, 4161 * setup for rate calculations, and select h/w transmit queue. 4162 */ 4163 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 4164 case IEEE80211_FC0_TYPE_MGT: 4165 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 4166 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 4167 atype = HAL_PKT_TYPE_BEACON; 4168 else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 4169 atype = HAL_PKT_TYPE_PROBE_RESP; 4170 else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 4171 atype = HAL_PKT_TYPE_ATIM; 4172 else 4173 atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 4174 rix = sc->sc_minrateix; 4175 txrate = rt->info[rix].rateCode; 4176 if (shortPreamble) 4177 txrate |= rt->info[rix].shortPreamble; 4178 try0 = ATH_TXMGTTRY; 4179 /* NB: force all management frames to highest queue */ 4180 if (ni->ni_flags & IEEE80211_NODE_QOS) { 4181 /* NB: force all management frames to highest queue */ 4182 pri = WME_AC_VO; 4183 } else 4184 pri = WME_AC_BE; 4185 flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 4186 break; 4187 case IEEE80211_FC0_TYPE_CTL: 4188 atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 4189 rix = sc->sc_minrateix; 4190 txrate = rt->info[rix].rateCode; 4191 if (shortPreamble) 4192 txrate |= rt->info[rix].shortPreamble; 4193 try0 = ATH_TXMGTTRY; 4194 /* NB: force all ctl frames to highest queue */ 4195 if (ni->ni_flags & IEEE80211_NODE_QOS) { 4196 /* NB: force all ctl frames to highest queue */ 4197 pri = WME_AC_VO; 4198 } else 4199 pri = WME_AC_BE; 4200 flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 4201 break; 4202 case IEEE80211_FC0_TYPE_DATA: 4203 atype = HAL_PKT_TYPE_NORMAL; /* default */ 4204 /* 4205 * Data frames: multicast frames go out at a fixed rate, 4206 * otherwise consult the rate control module for the 4207 * rate to use. 4208 */ 4209 if (ismcast) { 4210 /* 4211 * Check mcast rate setting in case it's changed. 4212 * XXX move out of fastpath 4213 */ 4214 if (ic->ic_mcast_rate != sc->sc_mcastrate) { 4215 sc->sc_mcastrix = 4216 ath_tx_findrix(rt, ic->ic_mcast_rate); 4217 sc->sc_mcastrate = ic->ic_mcast_rate; 4218 } 4219 rix = sc->sc_mcastrix; 4220 txrate = rt->info[rix].rateCode; 4221 if (shortPreamble) 4222 txrate |= rt->info[rix].shortPreamble; 4223 try0 = 1; 4224 } else { 4225 ath_rate_findrate(sc, an, shortPreamble, pktlen, 4226 &rix, &try0, &txrate); 4227 sc->sc_txrate = txrate; /* for LED blinking */ 4228 sc->sc_lastdatarix = rix; /* for fast frames */ 4229 if (try0 != ATH_TXMAXTRY) 4230 ismrr = 1; 4231 } 4232 pri = M_WME_GETAC(m0); 4233 if (cap->cap_wmeParams[pri].wmep_noackPolicy) 4234 flags |= HAL_TXDESC_NOACK; 4235 break; 4236 default: 4237 if_printf(ifp, "bogus frame type 0x%x (%s)\n", 4238 wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 4239 /* XXX statistic */ 4240 ath_freetx(m0); 4241 return EIO; 4242 } 4243 txq = sc->sc_ac2q[pri]; 4244 4245 /* 4246 * When servicing one or more stations in power-save mode 4247 * (or) if there is some mcast data waiting on the mcast 4248 * queue (to prevent out of order delivery) multicast 4249 * frames must be buffered until after the beacon. 4250 */ 4251 if (ismcast && (ic->ic_ps_sta || sc->sc_mcastq.axq_depth)) { 4252 txq = &sc->sc_mcastq; 4253 /* XXX? more bit in 802.11 frame header */ 4254 } 4255 4256 /* 4257 * Calculate miscellaneous flags. 4258 */ 4259 if (ismcast) { 4260 flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 4261 } else if (pktlen > ic->ic_rtsthreshold && 4262 (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 4263 flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 4264 cix = rt->info[rix].controlRate; 4265 sc->sc_stats.ast_tx_rts++; 4266 } 4267 if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 4268 sc->sc_stats.ast_tx_noack++; 4269 4270 /* 4271 * If 802.11g protection is enabled, determine whether 4272 * to use RTS/CTS or just CTS. Note that this is only 4273 * done for OFDM unicast frames. 4274 */ 4275 if ((ic->ic_flags & IEEE80211_F_USEPROT) && 4276 rt->info[rix].phy == IEEE80211_T_OFDM && 4277 (flags & HAL_TXDESC_NOACK) == 0) { 4278 /* XXX fragments must use CCK rates w/ protection */ 4279 if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) 4280 flags |= HAL_TXDESC_RTSENA; 4281 else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) 4282 flags |= HAL_TXDESC_CTSENA; 4283 if (isfrag) { 4284 /* 4285 * For frags it would be desirable to use the 4286 * highest CCK rate for RTS/CTS. But stations 4287 * farther away may detect it at a lower CCK rate 4288 * so use the configured protection rate instead 4289 * (for now). 4290 */ 4291 cix = rt->info[sc->sc_protrix].controlRate; 4292 } else 4293 cix = rt->info[sc->sc_protrix].controlRate; 4294 sc->sc_stats.ast_tx_protect++; 4295 } 4296 4297 /* 4298 * Calculate duration. This logically belongs in the 802.11 4299 * layer but it lacks sufficient information to calculate it. 4300 */ 4301 if ((flags & HAL_TXDESC_NOACK) == 0 && 4302 (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 4303 u_int16_t dur; 4304 if (shortPreamble) 4305 dur = rt->info[rix].spAckDuration; 4306 else 4307 dur = rt->info[rix].lpAckDuration; 4308 if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 4309 dur += dur; /* additional SIFS+ACK */ 4310 KASSERT(m0->m_nextpkt != NULL, ("no fragment")); 4311 /* 4312 * Include the size of next fragment so NAV is 4313 * updated properly. The last fragment uses only 4314 * the ACK duration 4315 */ 4316 dur += ath_hal_computetxtime(ah, rt, 4317 m0->m_nextpkt->m_pkthdr.len, 4318 rix, shortPreamble); 4319 } 4320 if (isfrag) { 4321 /* 4322 * Force hardware to use computed duration for next 4323 * fragment by disabling multi-rate retry which updates 4324 * duration based on the multi-rate duration table. 4325 */ 4326 ismrr = 0; 4327 try0 = ATH_TXMGTTRY; /* XXX? */ 4328 } 4329 *(u_int16_t *)wh->i_dur = htole16(dur); 4330 } 4331 4332 /* 4333 * Calculate RTS/CTS rate and duration if needed. 4334 */ 4335 ctsduration = 0; 4336 if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) { 4337 /* 4338 * CTS transmit rate is derived from the transmit rate 4339 * by looking in the h/w rate table. We must also factor 4340 * in whether or not a short preamble is to be used. 4341 */ 4342 /* NB: cix is set above where RTS/CTS is enabled */ 4343 KASSERT(cix != 0xff, ("cix not setup")); 4344 ctsrate = rt->info[cix].rateCode; 4345 /* 4346 * Compute the transmit duration based on the frame 4347 * size and the size of an ACK frame. We call into the 4348 * HAL to do the computation since it depends on the 4349 * characteristics of the actual PHY being used. 4350 * 4351 * NB: CTS is assumed the same size as an ACK so we can 4352 * use the precalculated ACK durations. 4353 */ 4354 if (shortPreamble) { 4355 ctsrate |= rt->info[cix].shortPreamble; 4356 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 4357 ctsduration += rt->info[cix].spAckDuration; 4358 ctsduration += ath_hal_computetxtime(ah, 4359 rt, pktlen, rix, AH_TRUE); 4360 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 4361 ctsduration += rt->info[rix].spAckDuration; 4362 } else { 4363 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 4364 ctsduration += rt->info[cix].lpAckDuration; 4365 ctsduration += ath_hal_computetxtime(ah, 4366 rt, pktlen, rix, AH_FALSE); 4367 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 4368 ctsduration += rt->info[rix].lpAckDuration; 4369 } 4370 /* 4371 * Must disable multi-rate retry when using RTS/CTS. 4372 */ 4373 ismrr = 0; 4374 try0 = ATH_TXMGTTRY; /* XXX */ 4375 } else 4376 ctsrate = 0; 4377 4378 /* 4379 * At this point we are committed to sending the frame 4380 * and we don't need to look at m_nextpkt; clear it in 4381 * case this frame is part of frag chain. 4382 */ 4383 m0->m_nextpkt = NULL; 4384 4385 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 4386 ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 4387 sc->sc_hwmap[txrate].ieeerate, -1); 4388 4389 if (bpf_peers_present(ic->ic_rawbpf)) 4390 bpf_mtap(ic->ic_rawbpf, m0); 4391 if (bpf_peers_present(sc->sc_drvbpf)) { 4392 u_int64_t tsf = ath_hal_gettsf64(ah); 4393 4394 sc->sc_tx_th.wt_tsf = htole64(tsf); 4395 sc->sc_tx_th.wt_flags = sc->sc_hwmap[txrate].txflags; 4396 if (iswep) 4397 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 4398 if (isfrag) 4399 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 4400 sc->sc_tx_th.wt_rate = sc->sc_hwmap[txrate].ieeerate; 4401 sc->sc_tx_th.wt_txpower = ni->ni_txpower; 4402 sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 4403 4404 bpf_mtap2(sc->sc_drvbpf, 4405 &sc->sc_tx_th, sc->sc_tx_th_len, m0); 4406 } 4407 4408 /* 4409 * Determine if a tx interrupt should be generated for 4410 * this descriptor. We take a tx interrupt to reap 4411 * descriptors when the h/w hits an EOL condition or 4412 * when the descriptor is specifically marked to generate 4413 * an interrupt. We periodically mark descriptors in this 4414 * way to insure timely replenishing of the supply needed 4415 * for sending frames. Defering interrupts reduces system 4416 * load and potentially allows more concurrent work to be 4417 * done but if done to aggressively can cause senders to 4418 * backup. 4419 * 4420 * NB: use >= to deal with sc_txintrperiod changing 4421 * dynamically through sysctl. 4422 */ 4423 if (flags & HAL_TXDESC_INTREQ) { 4424 txq->axq_intrcnt = 0; 4425 } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 4426 flags |= HAL_TXDESC_INTREQ; 4427 txq->axq_intrcnt = 0; 4428 } 4429 4430 /* 4431 * Formulate first tx descriptor with tx controls. 4432 */ 4433 /* XXX check return value? */ 4434 ath_hal_setuptxdesc(ah, ds 4435 , pktlen /* packet length */ 4436 , hdrlen /* header length */ 4437 , atype /* Atheros packet type */ 4438 , ni->ni_txpower /* txpower */ 4439 , txrate, try0 /* series 0 rate/tries */ 4440 , keyix /* key cache index */ 4441 , sc->sc_txantenna /* antenna mode */ 4442 , flags /* flags */ 4443 , ctsrate /* rts/cts rate */ 4444 , ctsduration /* rts/cts duration */ 4445 ); 4446 bf->bf_flags = flags; 4447 /* 4448 * Setup the multi-rate retry state only when we're 4449 * going to use it. This assumes ath_hal_setuptxdesc 4450 * initializes the descriptors (so we don't have to) 4451 * when the hardware supports multi-rate retry and 4452 * we don't use it. 4453 */ 4454 if (ismrr) 4455 ath_rate_setupxtxdesc(sc, an, ds, shortPreamble, rix); 4456 4457 ath_tx_handoff(sc, txq, bf); 4458 return 0; 4459 } 4460 4461 /* 4462 * Process completed xmit descriptors from the specified queue. 4463 */ 4464 static int 4465 ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) 4466 { 4467 struct ath_hal *ah = sc->sc_ah; 4468 struct ieee80211com *ic = &sc->sc_ic; 4469 struct ath_buf *bf; 4470 struct ath_desc *ds, *ds0; 4471 struct ath_tx_status *ts; 4472 struct ieee80211_node *ni; 4473 struct ath_node *an; 4474 int sr, lr, pri, nacked; 4475 HAL_STATUS status; 4476 4477 DPRINTF(sc, ATH_DEBUG_TX_PROC, "%s: tx queue %u head %p link %p\n", 4478 __func__, txq->axq_qnum, 4479 (caddr_t)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum), 4480 txq->axq_link); 4481 nacked = 0; 4482 for (;;) { 4483 ATH_TXQ_LOCK(txq); 4484 txq->axq_intrcnt = 0; /* reset periodic desc intr count */ 4485 bf = STAILQ_FIRST(&txq->axq_q); 4486 if (bf == NULL) { 4487 ATH_TXQ_UNLOCK(txq); 4488 break; 4489 } 4490 ds0 = &bf->bf_desc[0]; 4491 ds = &bf->bf_desc[bf->bf_nseg - 1]; 4492 ts = &bf->bf_status.ds_txstat; 4493 status = ath_hal_txprocdesc(ah, ds, ts); 4494 #ifdef ATH_DEBUG 4495 if (sc->sc_debug & ATH_DEBUG_XMIT_DESC) 4496 ath_printtxbuf(bf, txq->axq_qnum, 0, status == HAL_OK); 4497 #endif 4498 if (status == HAL_EINPROGRESS) { 4499 ATH_TXQ_UNLOCK(txq); 4500 break; 4501 } 4502 ATH_TXQ_REMOVE_HEAD(txq, bf_list); 4503 if (txq->axq_depth == 0) 4504 txq->axq_link = NULL; 4505 ATH_TXQ_UNLOCK(txq); 4506 4507 ni = bf->bf_node; 4508 if (ni != NULL) { 4509 an = ATH_NODE(ni); 4510 if (ts->ts_status == 0) { 4511 u_int8_t txant = ts->ts_antenna; 4512 sc->sc_stats.ast_ant_tx[txant]++; 4513 sc->sc_ant_tx[txant]++; 4514 if (ts->ts_rate & HAL_TXSTAT_ALTRATE) 4515 sc->sc_stats.ast_tx_altrate++; 4516 sc->sc_stats.ast_tx_rssi = ts->ts_rssi; 4517 ATH_RSSI_LPF(sc->sc_halstats.ns_avgtxrssi, 4518 ts->ts_rssi); 4519 pri = M_WME_GETAC(bf->bf_m); 4520 if (pri >= WME_AC_VO) 4521 ic->ic_wme.wme_hipri_traffic++; 4522 ni->ni_inact = ni->ni_inact_reload; 4523 } else { 4524 if (ts->ts_status & HAL_TXERR_XRETRY) 4525 sc->sc_stats.ast_tx_xretries++; 4526 if (ts->ts_status & HAL_TXERR_FIFO) 4527 sc->sc_stats.ast_tx_fifoerr++; 4528 if (ts->ts_status & HAL_TXERR_FILT) 4529 sc->sc_stats.ast_tx_filtered++; 4530 if (bf->bf_m->m_flags & M_FF) 4531 sc->sc_stats.ast_ff_txerr++; 4532 } 4533 sr = ts->ts_shortretry; 4534 lr = ts->ts_longretry; 4535 sc->sc_stats.ast_tx_shortretry += sr; 4536 sc->sc_stats.ast_tx_longretry += lr; 4537 /* 4538 * Hand the descriptor to the rate control algorithm. 4539 */ 4540 if ((ts->ts_status & HAL_TXERR_FILT) == 0 && 4541 (bf->bf_flags & HAL_TXDESC_NOACK) == 0) { 4542 /* 4543 * If frame was ack'd update the last rx time 4544 * used to workaround phantom bmiss interrupts. 4545 */ 4546 if (ts->ts_status == 0) 4547 nacked++; 4548 ath_rate_tx_complete(sc, an, bf); 4549 } 4550 /* 4551 * Do any tx complete callback. Note this must 4552 * be done before releasing the node reference. 4553 */ 4554 if (bf->bf_m->m_flags & M_TXCB) 4555 ieee80211_process_callback(ni, bf->bf_m, 4556 ts->ts_status); 4557 /* 4558 * Reclaim reference to node. 4559 * 4560 * NB: the node may be reclaimed here if, for example 4561 * this is a DEAUTH message that was sent and the 4562 * node was timed out due to inactivity. 4563 */ 4564 ieee80211_free_node(ni); 4565 } 4566 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 4567 BUS_DMASYNC_POSTWRITE); 4568 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 4569 4570 m_freem(bf->bf_m); 4571 bf->bf_m = NULL; 4572 bf->bf_node = NULL; 4573 4574 ATH_TXBUF_LOCK(sc); 4575 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 4576 ATH_TXBUF_UNLOCK(sc); 4577 } 4578 /* 4579 * Flush fast-frame staging queue when traffic slows. 4580 */ 4581 if (txq->axq_depth <= 1) 4582 ath_ff_stageq_flush(sc, txq, ath_ff_always); 4583 return nacked; 4584 } 4585 4586 static __inline int 4587 txqactive(struct ath_hal *ah, int qnum) 4588 { 4589 u_int32_t txqs = 1<<qnum; 4590 ath_hal_gettxintrtxqs(ah, &txqs); 4591 return (txqs & (1<<qnum)); 4592 } 4593 4594 /* 4595 * Deferred processing of transmit interrupt; special-cased 4596 * for a single hardware transmit queue (e.g. 5210 and 5211). 4597 */ 4598 static void 4599 ath_tx_proc_q0(void *arg, int npending) 4600 { 4601 struct ath_softc *sc = arg; 4602 struct ifnet *ifp = sc->sc_ifp; 4603 4604 if (txqactive(sc->sc_ah, 0) && ath_tx_processq(sc, &sc->sc_txq[0])) 4605 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4606 if (txqactive(sc->sc_ah, sc->sc_cabq->axq_qnum)) 4607 ath_tx_processq(sc, sc->sc_cabq); 4608 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4609 ifp->if_timer = 0; 4610 4611 if (sc->sc_softled) 4612 ath_led_event(sc, ATH_LED_TX); 4613 4614 ath_start(ifp); 4615 } 4616 4617 /* 4618 * Deferred processing of transmit interrupt; special-cased 4619 * for four hardware queues, 0-3 (e.g. 5212 w/ WME support). 4620 */ 4621 static void 4622 ath_tx_proc_q0123(void *arg, int npending) 4623 { 4624 struct ath_softc *sc = arg; 4625 struct ifnet *ifp = sc->sc_ifp; 4626 int nacked; 4627 4628 /* 4629 * Process each active queue. 4630 */ 4631 nacked = 0; 4632 if (txqactive(sc->sc_ah, 0)) 4633 nacked += ath_tx_processq(sc, &sc->sc_txq[0]); 4634 if (txqactive(sc->sc_ah, 1)) 4635 nacked += ath_tx_processq(sc, &sc->sc_txq[1]); 4636 if (txqactive(sc->sc_ah, 2)) 4637 nacked += ath_tx_processq(sc, &sc->sc_txq[2]); 4638 if (txqactive(sc->sc_ah, 3)) 4639 nacked += ath_tx_processq(sc, &sc->sc_txq[3]); 4640 if (txqactive(sc->sc_ah, sc->sc_cabq->axq_qnum)) 4641 ath_tx_processq(sc, sc->sc_cabq); 4642 if (nacked) 4643 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4644 4645 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4646 ifp->if_timer = 0; 4647 4648 if (sc->sc_softled) 4649 ath_led_event(sc, ATH_LED_TX); 4650 4651 ath_start(ifp); 4652 } 4653 4654 /* 4655 * Deferred processing of transmit interrupt. 4656 */ 4657 static void 4658 ath_tx_proc(void *arg, int npending) 4659 { 4660 struct ath_softc *sc = arg; 4661 struct ifnet *ifp = sc->sc_ifp; 4662 int i, nacked; 4663 4664 /* 4665 * Process each active queue. 4666 */ 4667 nacked = 0; 4668 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4669 if (ATH_TXQ_SETUP(sc, i) && txqactive(sc->sc_ah, i)) 4670 nacked += ath_tx_processq(sc, &sc->sc_txq[i]); 4671 if (nacked) 4672 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4673 4674 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4675 ifp->if_timer = 0; 4676 4677 if (sc->sc_softled) 4678 ath_led_event(sc, ATH_LED_TX); 4679 4680 ath_start(ifp); 4681 } 4682 4683 static void 4684 ath_tx_draintxq(struct ath_softc *sc, struct ath_txq *txq) 4685 { 4686 #ifdef ATH_DEBUG 4687 struct ath_hal *ah = sc->sc_ah; 4688 #endif 4689 struct ieee80211_node *ni; 4690 struct ath_buf *bf; 4691 u_int ix; 4692 4693 /* 4694 * NB: this assumes output has been stopped and 4695 * we do not need to block ath_tx_tasklet 4696 */ 4697 for (ix = 0;; ix++) { 4698 ATH_TXQ_LOCK(txq); 4699 bf = STAILQ_FIRST(&txq->axq_q); 4700 if (bf == NULL) { 4701 txq->axq_link = NULL; 4702 ATH_TXQ_UNLOCK(txq); 4703 break; 4704 } 4705 ATH_TXQ_REMOVE_HEAD(txq, bf_list); 4706 ATH_TXQ_UNLOCK(txq); 4707 #ifdef ATH_DEBUG 4708 if (sc->sc_debug & ATH_DEBUG_RESET) { 4709 ath_printtxbuf(bf, txq->axq_qnum, ix, 4710 ath_hal_txprocdesc(ah, bf->bf_desc, 4711 &bf->bf_status.ds_txstat) == HAL_OK); 4712 ieee80211_dump_pkt(&sc->sc_ic, mtod(bf->bf_m, caddr_t), 4713 bf->bf_m->m_len, 0, -1); 4714 } 4715 #endif /* ATH_DEBUG */ 4716 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 4717 ni = bf->bf_node; 4718 bf->bf_node = NULL; 4719 if (ni != NULL) { 4720 /* 4721 * Do any callback and reclaim the node reference. 4722 */ 4723 if (bf->bf_m->m_flags & M_TXCB) 4724 ieee80211_process_callback(ni, bf->bf_m, -1); 4725 ieee80211_free_node(ni); 4726 } 4727 m_freem(bf->bf_m); 4728 bf->bf_m = NULL; 4729 4730 ATH_TXBUF_LOCK(sc); 4731 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 4732 ATH_TXBUF_UNLOCK(sc); 4733 } 4734 } 4735 4736 static void 4737 ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq) 4738 { 4739 struct ath_hal *ah = sc->sc_ah; 4740 4741 DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n", 4742 __func__, txq->axq_qnum, 4743 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, txq->axq_qnum), 4744 txq->axq_link); 4745 (void) ath_hal_stoptxdma(ah, txq->axq_qnum); 4746 } 4747 4748 /* 4749 * Drain the transmit queues and reclaim resources. 4750 */ 4751 static void 4752 ath_draintxq(struct ath_softc *sc) 4753 { 4754 struct ath_hal *ah = sc->sc_ah; 4755 struct ifnet *ifp = sc->sc_ifp; 4756 int i; 4757 4758 /* XXX return value */ 4759 if (!sc->sc_invalid) { 4760 /* don't touch the hardware if marked invalid */ 4761 DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n", 4762 __func__, sc->sc_bhalq, 4763 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, sc->sc_bhalq), 4764 NULL); 4765 (void) ath_hal_stoptxdma(ah, sc->sc_bhalq); 4766 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4767 if (ATH_TXQ_SETUP(sc, i)) 4768 ath_tx_stopdma(sc, &sc->sc_txq[i]); 4769 } 4770 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4771 if (ATH_TXQ_SETUP(sc, i)) 4772 ath_tx_draintxq(sc, &sc->sc_txq[i]); 4773 ath_tx_draintxq(sc, &sc->sc_mcastq); 4774 #ifdef ATH_DEBUG 4775 if (sc->sc_debug & ATH_DEBUG_RESET) { 4776 struct ath_buf *bf = STAILQ_FIRST(&sc->sc_bbuf); 4777 if (bf != NULL && bf->bf_m != NULL) { 4778 ath_printtxbuf(bf, sc->sc_bhalq, 0, 4779 ath_hal_txprocdesc(ah, bf->bf_desc, 4780 &bf->bf_status.ds_txstat) == HAL_OK); 4781 ieee80211_dump_pkt(&sc->sc_ic, mtod(bf->bf_m, caddr_t), 4782 bf->bf_m->m_len, 0, -1); 4783 } 4784 } 4785 #endif /* ATH_DEBUG */ 4786 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4787 ifp->if_timer = 0; 4788 } 4789 4790 /* 4791 * Disable the receive h/w in preparation for a reset. 4792 */ 4793 static void 4794 ath_stoprecv(struct ath_softc *sc) 4795 { 4796 #define PA2DESC(_sc, _pa) \ 4797 ((struct ath_desc *)((caddr_t)(_sc)->sc_rxdma.dd_desc + \ 4798 ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr))) 4799 struct ath_hal *ah = sc->sc_ah; 4800 4801 ath_hal_stoppcurecv(ah); /* disable PCU */ 4802 ath_hal_setrxfilter(ah, 0); /* clear recv filter */ 4803 ath_hal_stopdmarecv(ah); /* disable DMA engine */ 4804 DELAY(3000); /* 3ms is long enough for 1 frame */ 4805 #ifdef ATH_DEBUG 4806 if (sc->sc_debug & (ATH_DEBUG_RESET | ATH_DEBUG_FATAL)) { 4807 struct ath_buf *bf; 4808 u_int ix; 4809 4810 printf("%s: rx queue %p, link %p\n", __func__, 4811 (caddr_t)(uintptr_t) ath_hal_getrxbuf(ah), sc->sc_rxlink); 4812 ix = 0; 4813 STAILQ_FOREACH(bf, &sc->sc_rxbuf, bf_list) { 4814 struct ath_desc *ds = bf->bf_desc; 4815 struct ath_rx_status *rs = &bf->bf_status.ds_rxstat; 4816 HAL_STATUS status = ath_hal_rxprocdesc(ah, ds, 4817 bf->bf_daddr, PA2DESC(sc, ds->ds_link), rs); 4818 if (status == HAL_OK || (sc->sc_debug & ATH_DEBUG_FATAL)) 4819 ath_printrxbuf(bf, ix, status == HAL_OK); 4820 ix++; 4821 } 4822 } 4823 #endif 4824 if (sc->sc_rxpending != NULL) { 4825 m_freem(sc->sc_rxpending); 4826 sc->sc_rxpending = NULL; 4827 } 4828 sc->sc_rxlink = NULL; /* just in case */ 4829 #undef PA2DESC 4830 } 4831 4832 /* 4833 * Enable the receive h/w following a reset. 4834 */ 4835 static int 4836 ath_startrecv(struct ath_softc *sc) 4837 { 4838 struct ath_hal *ah = sc->sc_ah; 4839 struct ath_buf *bf; 4840 4841 sc->sc_rxlink = NULL; 4842 sc->sc_rxpending = NULL; 4843 STAILQ_FOREACH(bf, &sc->sc_rxbuf, bf_list) { 4844 int error = ath_rxbuf_init(sc, bf); 4845 if (error != 0) { 4846 DPRINTF(sc, ATH_DEBUG_RECV, 4847 "%s: ath_rxbuf_init failed %d\n", 4848 __func__, error); 4849 return error; 4850 } 4851 } 4852 4853 bf = STAILQ_FIRST(&sc->sc_rxbuf); 4854 ath_hal_putrxbuf(ah, bf->bf_daddr); 4855 ath_hal_rxena(ah); /* enable recv descriptors */ 4856 ath_mode_init(sc); /* set filters, etc. */ 4857 ath_hal_startpcurecv(ah); /* re-enable PCU/DMA engine */ 4858 return 0; 4859 } 4860 4861 /* 4862 * Update internal state after a channel change. 4863 */ 4864 static void 4865 ath_chan_change(struct ath_softc *sc, struct ieee80211_channel *chan) 4866 { 4867 enum ieee80211_phymode mode; 4868 4869 /* 4870 * Change channels and update the h/w rate map 4871 * if we're switching; e.g. 11a to 11b/g. 4872 */ 4873 if (IEEE80211_IS_CHAN_HALF(chan)) 4874 mode = IEEE80211_MODE_HALF; 4875 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 4876 mode = IEEE80211_MODE_QUARTER; 4877 else 4878 mode = ieee80211_chan2mode(chan); 4879 if (mode != sc->sc_curmode) 4880 ath_setcurmode(sc, mode); 4881 4882 sc->sc_rx_th.wr_chan_flags = htole32(chan->ic_flags); 4883 sc->sc_tx_th.wt_chan_flags = sc->sc_rx_th.wr_chan_flags; 4884 sc->sc_rx_th.wr_chan_freq = htole16(chan->ic_freq); 4885 sc->sc_tx_th.wt_chan_freq = sc->sc_rx_th.wr_chan_freq; 4886 sc->sc_rx_th.wr_chan_ieee = chan->ic_ieee; 4887 sc->sc_tx_th.wt_chan_ieee = sc->sc_rx_th.wr_chan_ieee; 4888 sc->sc_rx_th.wr_chan_maxpow = chan->ic_maxregpower; 4889 sc->sc_tx_th.wt_chan_maxpow = sc->sc_rx_th.wr_chan_maxpow; 4890 } 4891 4892 /* 4893 * Poll for a channel clear indication; this is required 4894 * for channels requiring DFS and not previously visited 4895 * and/or with a recent radar detection. 4896 */ 4897 static void 4898 ath_dfswait(void *arg) 4899 { 4900 struct ath_softc *sc = arg; 4901 struct ath_hal *ah = sc->sc_ah; 4902 HAL_CHANNEL hchan; 4903 4904 ath_hal_radar_wait(ah, &hchan); 4905 DPRINTF(sc, ATH_DEBUG_DFS, "%s: radar_wait %u/%x/%x\n", 4906 __func__, hchan.channel, hchan.channelFlags, hchan.privFlags); 4907 4908 if (hchan.privFlags & CHANNEL_INTERFERENCE) { 4909 if_printf(sc->sc_ifp, 4910 "channel %u/0x%x/0x%x has interference\n", 4911 hchan.channel, hchan.channelFlags, hchan.privFlags); 4912 return; 4913 } 4914 if ((hchan.privFlags & CHANNEL_DFS) == 0) { 4915 /* XXX should not happen */ 4916 return; 4917 } 4918 if (hchan.privFlags & CHANNEL_DFS_CLEAR) { 4919 sc->sc_curchan.privFlags |= CHANNEL_DFS_CLEAR; 4920 sc->sc_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 4921 if_printf(sc->sc_ifp, 4922 "channel %u/0x%x/0x%x marked clear\n", 4923 hchan.channel, hchan.channelFlags, hchan.privFlags); 4924 } else 4925 callout_reset(&sc->sc_dfs_ch, 2 * hz, ath_dfswait, sc); 4926 } 4927 4928 /* 4929 * Set/change channels. If the channel is really being changed, 4930 * it's done by reseting the chip. To accomplish this we must 4931 * first cleanup any pending DMA, then restart stuff after a la 4932 * ath_init. 4933 */ 4934 static int 4935 ath_chan_set(struct ath_softc *sc, struct ieee80211_channel *chan) 4936 { 4937 struct ath_hal *ah = sc->sc_ah; 4938 struct ieee80211com *ic = &sc->sc_ic; 4939 HAL_CHANNEL hchan; 4940 4941 /* 4942 * Convert to a HAL channel description with 4943 * the flags constrained to reflect the current 4944 * operating mode. 4945 */ 4946 ath_mapchan(&hchan, chan); 4947 4948 DPRINTF(sc, ATH_DEBUG_RESET, 4949 "%s: %u (%u MHz, hal flags 0x%x) -> %u (%u MHz, hal flags 0x%x)\n", 4950 __func__, 4951 ath_hal_mhz2ieee(ah, sc->sc_curchan.channel, 4952 sc->sc_curchan.channelFlags), 4953 sc->sc_curchan.channel, sc->sc_curchan.channelFlags, 4954 ath_hal_mhz2ieee(ah, hchan.channel, hchan.channelFlags), 4955 hchan.channel, hchan.channelFlags); 4956 if (hchan.channel != sc->sc_curchan.channel || 4957 hchan.channelFlags != sc->sc_curchan.channelFlags) { 4958 HAL_STATUS status; 4959 4960 /* 4961 * To switch channels clear any pending DMA operations; 4962 * wait long enough for the RX fifo to drain, reset the 4963 * hardware at the new frequency, and then re-enable 4964 * the relevant bits of the h/w. 4965 */ 4966 ath_hal_intrset(ah, 0); /* disable interrupts */ 4967 ath_draintxq(sc); /* clear pending tx frames */ 4968 ath_stoprecv(sc); /* turn off frame recv */ 4969 if (!ath_hal_reset(ah, sc->sc_opmode, &hchan, AH_TRUE, &status)) { 4970 if_printf(ic->ic_ifp, "%s: unable to reset " 4971 "channel %u (%u Mhz, flags 0x%x hal flags 0x%x), " 4972 "hal status %u\n", __func__, 4973 ieee80211_chan2ieee(ic, chan), chan->ic_freq, 4974 chan->ic_flags, hchan.channelFlags, status); 4975 return EIO; 4976 } 4977 sc->sc_curchan = hchan; 4978 ath_update_txpow(sc); /* update tx power state */ 4979 sc->sc_diversity = ath_hal_getdiversity(ah); 4980 sc->sc_calinterval = 1; 4981 sc->sc_caltries = 0; 4982 4983 /* 4984 * Re-enable rx framework. 4985 */ 4986 if (ath_startrecv(sc) != 0) { 4987 if_printf(ic->ic_ifp, 4988 "%s: unable to restart recv logic\n", __func__); 4989 return EIO; 4990 } 4991 4992 /* 4993 * Change channels and update the h/w rate map 4994 * if we're switching; e.g. 11a to 11b/g. 4995 */ 4996 ath_chan_change(sc, chan); 4997 4998 /* 4999 * Handle DFS required waiting period to determine 5000 * if channel is clear of radar traffic. 5001 */ 5002 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 5003 #define DFS_AND_NOT_CLEAR(_c) \ 5004 (((_c)->privFlags & (CHANNEL_DFS | CHANNEL_DFS_CLEAR)) == CHANNEL_DFS) 5005 if (DFS_AND_NOT_CLEAR(&sc->sc_curchan)) { 5006 if_printf(sc->sc_ifp, 5007 "wait for DFS clear channel signal\n"); 5008 /* XXX stop sndq */ 5009 sc->sc_ifp->if_drv_flags |= IFF_DRV_OACTIVE; 5010 callout_reset(&sc->sc_dfs_ch, 5011 2 * hz, ath_dfswait, sc); 5012 } else 5013 callout_stop(&sc->sc_dfs_ch); 5014 #undef DFS_NOT_CLEAR 5015 } 5016 5017 /* 5018 * Re-enable interrupts. 5019 */ 5020 ath_hal_intrset(ah, sc->sc_imask); 5021 } 5022 return 0; 5023 } 5024 5025 /* 5026 * Periodically recalibrate the PHY to account 5027 * for temperature/environment changes. 5028 */ 5029 static void 5030 ath_calibrate(void *arg) 5031 { 5032 struct ath_softc *sc = arg; 5033 struct ath_hal *ah = sc->sc_ah; 5034 HAL_BOOL iqCalDone; 5035 5036 sc->sc_stats.ast_per_cal++; 5037 5038 if (ath_hal_getrfgain(ah) == HAL_RFGAIN_NEED_CHANGE) { 5039 /* 5040 * Rfgain is out of bounds, reset the chip 5041 * to load new gain values. 5042 */ 5043 DPRINTF(sc, ATH_DEBUG_CALIBRATE, 5044 "%s: rfgain change\n", __func__); 5045 sc->sc_stats.ast_per_rfgain++; 5046 ath_reset(sc->sc_ifp); 5047 } 5048 if (!ath_hal_calibrate(ah, &sc->sc_curchan, &iqCalDone)) { 5049 DPRINTF(sc, ATH_DEBUG_ANY, 5050 "%s: calibration of channel %u failed\n", 5051 __func__, sc->sc_curchan.channel); 5052 sc->sc_stats.ast_per_calfail++; 5053 } 5054 /* 5055 * Calibrate noise floor data again in case of change. 5056 */ 5057 ath_hal_process_noisefloor(ah); 5058 /* 5059 * Poll more frequently when the IQ calibration is in 5060 * progress to speedup loading the final settings. 5061 * We temper this aggressive polling with an exponential 5062 * back off after 4 tries up to ath_calinterval. 5063 */ 5064 if (iqCalDone || sc->sc_calinterval >= ath_calinterval) { 5065 sc->sc_caltries = 0; 5066 sc->sc_calinterval = ath_calinterval; 5067 } else if (sc->sc_caltries > 4) { 5068 sc->sc_caltries = 0; 5069 sc->sc_calinterval <<= 1; 5070 if (sc->sc_calinterval > ath_calinterval) 5071 sc->sc_calinterval = ath_calinterval; 5072 } 5073 KASSERT(0 < sc->sc_calinterval && sc->sc_calinterval <= ath_calinterval, 5074 ("bad calibration interval %u", sc->sc_calinterval)); 5075 5076 DPRINTF(sc, ATH_DEBUG_CALIBRATE, 5077 "%s: next +%u (%siqCalDone tries %u)\n", __func__, 5078 sc->sc_calinterval, iqCalDone ? "" : "!", sc->sc_caltries); 5079 sc->sc_caltries++; 5080 callout_reset(&sc->sc_cal_ch, sc->sc_calinterval * hz, 5081 ath_calibrate, sc); 5082 } 5083 5084 static void 5085 ath_scan_start(struct ieee80211com *ic) 5086 { 5087 struct ifnet *ifp = ic->ic_ifp; 5088 struct ath_softc *sc = ifp->if_softc; 5089 struct ath_hal *ah = sc->sc_ah; 5090 u_int32_t rfilt; 5091 5092 /* XXX calibration timer? */ 5093 5094 sc->sc_scanning = 1; 5095 sc->sc_syncbeacon = 0; 5096 rfilt = ath_calcrxfilter(sc); 5097 ath_hal_setrxfilter(ah, rfilt); 5098 ath_hal_setassocid(ah, ifp->if_broadcastaddr, 0); 5099 5100 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0\n", 5101 __func__, rfilt, ether_sprintf(ifp->if_broadcastaddr)); 5102 } 5103 5104 static void 5105 ath_scan_end(struct ieee80211com *ic) 5106 { 5107 struct ifnet *ifp = ic->ic_ifp; 5108 struct ath_softc *sc = ifp->if_softc; 5109 struct ath_hal *ah = sc->sc_ah; 5110 u_int32_t rfilt; 5111 5112 sc->sc_scanning = 0; 5113 rfilt = ath_calcrxfilter(sc); 5114 ath_hal_setrxfilter(ah, rfilt); 5115 ath_hal_setassocid(ah, sc->sc_curbssid, sc->sc_curaid); 5116 5117 ath_hal_process_noisefloor(ah); 5118 5119 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0x%x\n", 5120 __func__, rfilt, ether_sprintf(sc->sc_curbssid), 5121 sc->sc_curaid); 5122 } 5123 5124 static void 5125 ath_set_channel(struct ieee80211com *ic) 5126 { 5127 struct ifnet *ifp = ic->ic_ifp; 5128 struct ath_softc *sc = ifp->if_softc; 5129 5130 (void) ath_chan_set(sc, ic->ic_curchan); 5131 /* 5132 * If we are returning to our bss channel then mark state 5133 * so the next recv'd beacon's tsf will be used to sync the 5134 * beacon timers. Note that since we only hear beacons in 5135 * sta/ibss mode this has no effect in other operating modes. 5136 */ 5137 if (!sc->sc_scanning && ic->ic_curchan == ic->ic_bsschan) 5138 sc->sc_syncbeacon = 1; 5139 } 5140 5141 static int 5142 ath_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 5143 { 5144 struct ifnet *ifp = ic->ic_ifp; 5145 struct ath_softc *sc = ifp->if_softc; 5146 struct ath_hal *ah = sc->sc_ah; 5147 struct ieee80211_node *ni; 5148 int i, error, stamode; 5149 u_int32_t rfilt; 5150 static const HAL_LED_STATE leds[] = { 5151 HAL_LED_INIT, /* IEEE80211_S_INIT */ 5152 HAL_LED_SCAN, /* IEEE80211_S_SCAN */ 5153 HAL_LED_AUTH, /* IEEE80211_S_AUTH */ 5154 HAL_LED_ASSOC, /* IEEE80211_S_ASSOC */ 5155 HAL_LED_RUN, /* IEEE80211_S_CAC */ 5156 HAL_LED_RUN, /* IEEE80211_S_RUN */ 5157 HAL_LED_RUN, /* IEEE80211_S_CSA */ 5158 HAL_LED_RUN, /* IEEE80211_S_SLEEP */ 5159 }; 5160 5161 DPRINTF(sc, ATH_DEBUG_STATE, "%s: %s -> %s\n", __func__, 5162 ieee80211_state_name[ic->ic_state], 5163 ieee80211_state_name[nstate]); 5164 5165 callout_stop(&sc->sc_cal_ch); 5166 callout_stop(&sc->sc_dfs_ch); 5167 ath_hal_setledstate(ah, leds[nstate]); /* set LED */ 5168 5169 if (nstate == IEEE80211_S_INIT) { 5170 /* 5171 * Shutdown host/driver operation: 5172 * o disable interrupts so we don't rx frames 5173 * o clean any pending items on the task q 5174 * o notify the rate control algorithm 5175 */ 5176 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 5177 ath_hal_intrset(ah, sc->sc_imask &~ HAL_INT_GLOBAL); 5178 #if 0 5179 /* XXX can't use taskqueue_drain 'cuz we're holding sc_mtx */ 5180 taskqueue_drain(sc->sc_tq, &sc->sc_rxtask); 5181 taskqueue_drain(sc->sc_tq, &sc->sc_rxorntask); 5182 taskqueue_drain(sc->sc_tq, &sc->sc_bmisstask); 5183 taskqueue_drain(sc->sc_tq, &sc->sc_bstucktask); 5184 #endif 5185 ath_rate_newstate(sc, nstate); 5186 goto done; 5187 } 5188 ni = ic->ic_bss; 5189 5190 rfilt = ath_calcrxfilter(sc); 5191 stamode = (sc->sc_opmode == HAL_M_STA || sc->sc_opmode == HAL_M_IBSS); 5192 if (stamode && nstate == IEEE80211_S_RUN) { 5193 sc->sc_curaid = ni->ni_associd; 5194 IEEE80211_ADDR_COPY(sc->sc_curbssid, ni->ni_bssid); 5195 } else 5196 sc->sc_curaid = 0; 5197 5198 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s aid 0x%x\n", 5199 __func__, rfilt, ether_sprintf(sc->sc_curbssid), 5200 sc->sc_curaid); 5201 5202 ath_hal_setrxfilter(ah, rfilt); 5203 if (stamode) 5204 ath_hal_setassocid(ah, sc->sc_curbssid, ni->ni_associd); 5205 5206 if (ic->ic_opmode != IEEE80211_M_STA && 5207 (ic->ic_flags & IEEE80211_F_PRIVACY)) { 5208 for (i = 0; i < IEEE80211_WEP_NKID; i++) 5209 if (ath_hal_keyisvalid(ah, i)) 5210 ath_hal_keysetmac(ah, i, ni->ni_bssid); 5211 } 5212 5213 /* 5214 * Notify the rate control algorithm so rates 5215 * are setup should ath_beacon_alloc be called. 5216 */ 5217 ath_rate_newstate(sc, nstate); 5218 5219 if (nstate == IEEE80211_S_RUN) { 5220 DPRINTF(sc, ATH_DEBUG_STATE, 5221 "%s(RUN): ic_flags=0x%08x iv=%d bssid=%s " 5222 "capinfo=0x%04x chan=%d\n" 5223 , __func__ 5224 , ic->ic_flags 5225 , ni->ni_intval 5226 , ether_sprintf(ni->ni_bssid) 5227 , ni->ni_capinfo 5228 , ieee80211_chan2ieee(ic, ic->ic_curchan)); 5229 5230 switch (ic->ic_opmode) { 5231 case IEEE80211_M_HOSTAP: 5232 case IEEE80211_M_IBSS: 5233 /* 5234 * Allocate and setup the beacon frame. 5235 * 5236 * Stop any previous beacon DMA. This may be 5237 * necessary, for example, when an ibss merge 5238 * causes reconfiguration; there will be a state 5239 * transition from RUN->RUN that means we may 5240 * be called with beacon transmission active. 5241 */ 5242 ath_hal_stoptxdma(ah, sc->sc_bhalq); 5243 ath_beacon_free(sc); 5244 error = ath_beacon_alloc(sc, ni); 5245 if (error != 0) 5246 goto bad; 5247 /* 5248 * If joining an adhoc network defer beacon timer 5249 * configuration to the next beacon frame so we 5250 * have a current TSF to use. Otherwise we're 5251 * starting an ibss/bss so there's no need to delay. 5252 */ 5253 if (ic->ic_opmode == IEEE80211_M_IBSS && 5254 ic->ic_bss->ni_tstamp.tsf != 0) 5255 sc->sc_syncbeacon = 1; 5256 else 5257 ath_beacon_config(sc); 5258 break; 5259 case IEEE80211_M_STA: 5260 /* 5261 * Allocate a key cache slot to the station. 5262 */ 5263 if ((ic->ic_flags & IEEE80211_F_PRIVACY) == 0 && 5264 sc->sc_hasclrkey && 5265 ni->ni_ucastkey.wk_keyix == IEEE80211_KEYIX_NONE) 5266 ath_setup_stationkey(ni); 5267 /* 5268 * Defer beacon timer configuration to the next 5269 * beacon frame so we have a current TSF to use 5270 * (any TSF collected when scanning is likely old). 5271 */ 5272 sc->sc_syncbeacon = 1; 5273 break; 5274 default: 5275 break; 5276 } 5277 /* 5278 * Let the hal process statistics collected during a 5279 * scan so it can provide calibrated noise floor data. 5280 */ 5281 ath_hal_process_noisefloor(ah); 5282 /* 5283 * Reset rssi stats; maybe not the best place... 5284 */ 5285 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER; 5286 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER; 5287 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER; 5288 } else { 5289 ath_hal_intrset(ah, 5290 sc->sc_imask &~ (HAL_INT_SWBA | HAL_INT_BMISS)); 5291 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 5292 } 5293 done: 5294 /* 5295 * Invoke the parent method to complete the work. 5296 */ 5297 error = sc->sc_newstate(ic, nstate, arg); 5298 /* 5299 * Finally, start any timers. 5300 */ 5301 if (nstate == IEEE80211_S_RUN) { 5302 /* start periodic recalibration timer */ 5303 callout_reset(&sc->sc_cal_ch, sc->sc_calinterval * hz, 5304 ath_calibrate, sc); 5305 } 5306 bad: 5307 return error; 5308 } 5309 5310 /* 5311 * Allocate a key cache slot to the station so we can 5312 * setup a mapping from key index to node. The key cache 5313 * slot is needed for managing antenna state and for 5314 * compression when stations do not use crypto. We do 5315 * it uniliaterally here; if crypto is employed this slot 5316 * will be reassigned. 5317 */ 5318 static void 5319 ath_setup_stationkey(struct ieee80211_node *ni) 5320 { 5321 struct ieee80211com *ic = ni->ni_ic; 5322 struct ath_softc *sc = ic->ic_ifp->if_softc; 5323 ieee80211_keyix keyix, rxkeyix; 5324 5325 if (!ath_key_alloc(ic, &ni->ni_ucastkey, &keyix, &rxkeyix)) { 5326 /* 5327 * Key cache is full; we'll fall back to doing 5328 * the more expensive lookup in software. Note 5329 * this also means no h/w compression. 5330 */ 5331 /* XXX msg+statistic */ 5332 } else { 5333 /* XXX locking? */ 5334 ni->ni_ucastkey.wk_keyix = keyix; 5335 ni->ni_ucastkey.wk_rxkeyix = rxkeyix; 5336 /* NB: this will create a pass-thru key entry */ 5337 ath_keyset(sc, &ni->ni_ucastkey, ni->ni_macaddr, ic->ic_bss); 5338 } 5339 } 5340 5341 /* 5342 * Setup driver-specific state for a newly associated node. 5343 * Note that we're called also on a re-associate, the isnew 5344 * param tells us if this is the first time or not. 5345 */ 5346 static void 5347 ath_newassoc(struct ieee80211_node *ni, int isnew) 5348 { 5349 struct ieee80211com *ic = ni->ni_ic; 5350 struct ath_softc *sc = ic->ic_ifp->if_softc; 5351 5352 ath_rate_newassoc(sc, ATH_NODE(ni), isnew); 5353 if (isnew && 5354 (ic->ic_flags & IEEE80211_F_PRIVACY) == 0 && sc->sc_hasclrkey) { 5355 KASSERT(ni->ni_ucastkey.wk_keyix == IEEE80211_KEYIX_NONE, 5356 ("new assoc with a unicast key already setup (keyix %u)", 5357 ni->ni_ucastkey.wk_keyix)); 5358 ath_setup_stationkey(ni); 5359 } 5360 } 5361 5362 static int 5363 ath_getchannels(struct ath_softc *sc, 5364 HAL_REG_DOMAIN rd, HAL_CTRY_CODE cc, HAL_BOOL outdoor, HAL_BOOL xchanmode) 5365 { 5366 struct ieee80211com *ic = &sc->sc_ic; 5367 struct ifnet *ifp = sc->sc_ifp; 5368 struct ath_hal *ah = sc->sc_ah; 5369 HAL_CHANNEL *chans; 5370 int i, nchan; 5371 u_int32_t regdomain; 5372 5373 chans = malloc(IEEE80211_CHAN_MAX * sizeof(HAL_CHANNEL), 5374 M_TEMP, M_NOWAIT); 5375 if (chans == NULL) { 5376 if_printf(ifp, "unable to allocate channel table\n"); 5377 return ENOMEM; 5378 } 5379 if (!ath_hal_init_channels(ah, chans, IEEE80211_CHAN_MAX, &nchan, 5380 NULL, 0, NULL, cc, HAL_MODE_ALL, outdoor, xchanmode)) { 5381 (void) ath_hal_getregdomain(ah, ®domain); 5382 if_printf(ifp, "unable to collect channel list from hal; " 5383 "regdomain likely %u country code %u\n", regdomain, cc); 5384 free(chans, M_TEMP); 5385 return EINVAL; 5386 } 5387 5388 /* 5389 * Convert HAL channels to ieee80211 ones. 5390 */ 5391 memset(ic->ic_channels, 0, sizeof(ic->ic_channels)); 5392 for (i = 0; i < nchan; i++) { 5393 HAL_CHANNEL *c = &chans[i]; 5394 struct ieee80211_channel *ichan = &ic->ic_channels[i]; 5395 5396 ichan->ic_ieee = ath_hal_mhz2ieee(ah, c->channel, 5397 c->channelFlags); 5398 if (bootverbose) 5399 if_printf(ifp, "hal channel %u/%x -> %u\n", 5400 c->channel, c->channelFlags, ichan->ic_ieee); 5401 ichan->ic_freq = c->channel; 5402 5403 if ((c->channelFlags & CHANNEL_PUREG) == CHANNEL_PUREG) { 5404 /* 5405 * Except for AR5211, HAL's PUREG means mixed 5406 * DSSS and OFDM. 5407 */ 5408 ichan->ic_flags = c->channelFlags &~ CHANNEL_PUREG; 5409 ichan->ic_flags |= IEEE80211_CHAN_G; 5410 } else { 5411 ichan->ic_flags = c->channelFlags; 5412 } 5413 5414 if (ath_hal_isgsmsku(ah)) { 5415 /* remap to true frequencies */ 5416 ichan->ic_freq = 922 + (2422 - ichan->ic_freq); 5417 ichan->ic_flags |= IEEE80211_CHAN_GSM; 5418 ichan->ic_ieee = ieee80211_mhz2ieee(ichan->ic_freq, 5419 ichan->ic_flags); 5420 } 5421 ichan->ic_maxregpower = c->maxRegTxPower; /* dBm */ 5422 ichan->ic_maxpower = c->maxTxPower; /* 1/2 dBm */ 5423 ichan->ic_minpower = c->minTxPower; /* 1/2 dBm */ 5424 } 5425 ic->ic_nchans = nchan; 5426 free(chans, M_TEMP); 5427 (void) ath_hal_getregdomain(ah, &sc->sc_regdomain); 5428 ath_hal_getcountrycode(ah, &sc->sc_countrycode); 5429 sc->sc_xchanmode = xchanmode; 5430 sc->sc_outdoor = outdoor; 5431 return 0; 5432 } 5433 5434 static void 5435 ath_led_done(void *arg) 5436 { 5437 struct ath_softc *sc = arg; 5438 5439 sc->sc_blinking = 0; 5440 } 5441 5442 /* 5443 * Turn the LED off: flip the pin and then set a timer so no 5444 * update will happen for the specified duration. 5445 */ 5446 static void 5447 ath_led_off(void *arg) 5448 { 5449 struct ath_softc *sc = arg; 5450 5451 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, !sc->sc_ledon); 5452 callout_reset(&sc->sc_ledtimer, sc->sc_ledoff, ath_led_done, sc); 5453 } 5454 5455 /* 5456 * Blink the LED according to the specified on/off times. 5457 */ 5458 static void 5459 ath_led_blink(struct ath_softc *sc, int on, int off) 5460 { 5461 DPRINTF(sc, ATH_DEBUG_LED, "%s: on %u off %u\n", __func__, on, off); 5462 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, sc->sc_ledon); 5463 sc->sc_blinking = 1; 5464 sc->sc_ledoff = off; 5465 callout_reset(&sc->sc_ledtimer, on, ath_led_off, sc); 5466 } 5467 5468 static void 5469 ath_led_event(struct ath_softc *sc, int event) 5470 { 5471 5472 sc->sc_ledevent = ticks; /* time of last event */ 5473 if (sc->sc_blinking) /* don't interrupt active blink */ 5474 return; 5475 switch (event) { 5476 case ATH_LED_POLL: 5477 ath_led_blink(sc, sc->sc_hwmap[0].ledon, 5478 sc->sc_hwmap[0].ledoff); 5479 break; 5480 case ATH_LED_TX: 5481 ath_led_blink(sc, sc->sc_hwmap[sc->sc_txrate].ledon, 5482 sc->sc_hwmap[sc->sc_txrate].ledoff); 5483 break; 5484 case ATH_LED_RX: 5485 ath_led_blink(sc, sc->sc_hwmap[sc->sc_rxrate].ledon, 5486 sc->sc_hwmap[sc->sc_rxrate].ledoff); 5487 break; 5488 } 5489 } 5490 5491 static void 5492 ath_update_txpow(struct ath_softc *sc) 5493 { 5494 struct ieee80211com *ic = &sc->sc_ic; 5495 struct ath_hal *ah = sc->sc_ah; 5496 u_int32_t txpow; 5497 5498 if (sc->sc_curtxpow != ic->ic_txpowlimit) { 5499 ath_hal_settxpowlimit(ah, ic->ic_txpowlimit); 5500 /* read back in case value is clamped */ 5501 if (ath_hal_gettxpowlimit(ah, &txpow)) 5502 ic->ic_txpowlimit = sc->sc_curtxpow = txpow; 5503 } 5504 /* 5505 * Fetch max tx power level for status requests. 5506 */ 5507 if (ath_hal_getmaxtxpow(sc->sc_ah, &txpow)) 5508 ic->ic_bss->ni_txpower = txpow; 5509 } 5510 5511 static int 5512 ath_rate_setup(struct ath_softc *sc, u_int mode) 5513 { 5514 struct ath_hal *ah = sc->sc_ah; 5515 const HAL_RATE_TABLE *rt; 5516 5517 switch (mode) { 5518 case IEEE80211_MODE_11A: 5519 rt = ath_hal_getratetable(ah, HAL_MODE_11A); 5520 break; 5521 case IEEE80211_MODE_HALF: 5522 rt = ath_hal_getratetable(ah, HAL_MODE_11A_HALF_RATE); 5523 break; 5524 case IEEE80211_MODE_QUARTER: 5525 rt = ath_hal_getratetable(ah, HAL_MODE_11A_QUARTER_RATE); 5526 break; 5527 case IEEE80211_MODE_11B: 5528 rt = ath_hal_getratetable(ah, HAL_MODE_11B); 5529 break; 5530 case IEEE80211_MODE_11G: 5531 rt = ath_hal_getratetable(ah, HAL_MODE_11G); 5532 break; 5533 case IEEE80211_MODE_TURBO_A: 5534 rt = ath_hal_getratetable(ah, HAL_MODE_108A); 5535 #if HAL_ABI_VERSION < 0x07013100 5536 if (rt == NULL) /* XXX bandaid for old hal's */ 5537 rt = ath_hal_getratetable(ah, HAL_MODE_TURBO); 5538 #endif 5539 break; 5540 case IEEE80211_MODE_TURBO_G: 5541 rt = ath_hal_getratetable(ah, HAL_MODE_108G); 5542 break; 5543 case IEEE80211_MODE_STURBO_A: 5544 rt = ath_hal_getratetable(ah, HAL_MODE_TURBO); 5545 break; 5546 case IEEE80211_MODE_11NA: 5547 rt = ath_hal_getratetable(ah, HAL_MODE_11NA_HT20); 5548 break; 5549 case IEEE80211_MODE_11NG: 5550 rt = ath_hal_getratetable(ah, HAL_MODE_11NG_HT20); 5551 break; 5552 default: 5553 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid mode %u\n", 5554 __func__, mode); 5555 return 0; 5556 } 5557 sc->sc_rates[mode] = rt; 5558 return (rt != NULL); 5559 } 5560 5561 static void 5562 ath_setcurmode(struct ath_softc *sc, enum ieee80211_phymode mode) 5563 { 5564 #define N(a) (sizeof(a)/sizeof(a[0])) 5565 /* NB: on/off times from the Atheros NDIS driver, w/ permission */ 5566 static const struct { 5567 u_int rate; /* tx/rx 802.11 rate */ 5568 u_int16_t timeOn; /* LED on time (ms) */ 5569 u_int16_t timeOff; /* LED off time (ms) */ 5570 } blinkrates[] = { 5571 { 108, 40, 10 }, 5572 { 96, 44, 11 }, 5573 { 72, 50, 13 }, 5574 { 48, 57, 14 }, 5575 { 36, 67, 16 }, 5576 { 24, 80, 20 }, 5577 { 22, 100, 25 }, 5578 { 18, 133, 34 }, 5579 { 12, 160, 40 }, 5580 { 10, 200, 50 }, 5581 { 6, 240, 58 }, 5582 { 4, 267, 66 }, 5583 { 2, 400, 100 }, 5584 { 0, 500, 130 }, 5585 /* XXX half/quarter rates */ 5586 }; 5587 const HAL_RATE_TABLE *rt; 5588 int i, j; 5589 5590 memset(sc->sc_rixmap, 0xff, sizeof(sc->sc_rixmap)); 5591 rt = sc->sc_rates[mode]; 5592 KASSERT(rt != NULL, ("no h/w rate set for phy mode %u", mode)); 5593 for (i = 0; i < rt->rateCount; i++) 5594 sc->sc_rixmap[rt->info[i].dot11Rate & IEEE80211_RATE_VAL] = i; 5595 memset(sc->sc_hwmap, 0, sizeof(sc->sc_hwmap)); 5596 for (i = 0; i < 32; i++) { 5597 u_int8_t ix = rt->rateCodeToIndex[i]; 5598 if (ix == 0xff) { 5599 sc->sc_hwmap[i].ledon = (500 * hz) / 1000; 5600 sc->sc_hwmap[i].ledoff = (130 * hz) / 1000; 5601 continue; 5602 } 5603 sc->sc_hwmap[i].ieeerate = 5604 rt->info[ix].dot11Rate & IEEE80211_RATE_VAL; 5605 if (rt->info[ix].phy == IEEE80211_T_HT) 5606 sc->sc_hwmap[i].ieeerate |= 0x80; /* MCS */ 5607 sc->sc_hwmap[i].txflags = IEEE80211_RADIOTAP_F_DATAPAD; 5608 if (rt->info[ix].shortPreamble || 5609 rt->info[ix].phy == IEEE80211_T_OFDM) 5610 sc->sc_hwmap[i].txflags |= IEEE80211_RADIOTAP_F_SHORTPRE; 5611 /* NB: receive frames include FCS */ 5612 sc->sc_hwmap[i].rxflags = sc->sc_hwmap[i].txflags | 5613 IEEE80211_RADIOTAP_F_FCS; 5614 /* setup blink rate table to avoid per-packet lookup */ 5615 for (j = 0; j < N(blinkrates)-1; j++) 5616 if (blinkrates[j].rate == sc->sc_hwmap[i].ieeerate) 5617 break; 5618 /* NB: this uses the last entry if the rate isn't found */ 5619 /* XXX beware of overlow */ 5620 sc->sc_hwmap[i].ledon = (blinkrates[j].timeOn * hz) / 1000; 5621 sc->sc_hwmap[i].ledoff = (blinkrates[j].timeOff * hz) / 1000; 5622 } 5623 sc->sc_currates = rt; 5624 sc->sc_curmode = mode; 5625 /* 5626 * All protection frames are transmited at 2Mb/s for 5627 * 11g, otherwise at 1Mb/s. 5628 */ 5629 if (mode == IEEE80211_MODE_11G) 5630 sc->sc_protrix = ath_tx_findrix(rt, 2*2); 5631 else 5632 sc->sc_protrix = ath_tx_findrix(rt, 2*1); 5633 /* rate index used to send management frames */ 5634 sc->sc_minrateix = 0; 5635 /* 5636 * Setup multicast rate state. 5637 */ 5638 /* XXX layering violation */ 5639 sc->sc_mcastrix = ath_tx_findrix(rt, sc->sc_ic.ic_mcast_rate); 5640 sc->sc_mcastrate = sc->sc_ic.ic_mcast_rate; 5641 /* NB: caller is responsible for reseting rate control state */ 5642 #undef N 5643 } 5644 5645 #ifdef ATH_DEBUG 5646 static void 5647 ath_printrxbuf(const struct ath_buf *bf, u_int ix, int done) 5648 { 5649 const struct ath_rx_status *rs = &bf->bf_status.ds_rxstat; 5650 const struct ath_desc *ds; 5651 int i; 5652 5653 for (i = 0, ds = bf->bf_desc; i < bf->bf_nseg; i++, ds++) { 5654 printf("R[%2u] (DS.V:%p DS.P:%p) L:%08x D:%08x%s\n" 5655 " %08x %08x %08x %08x\n", 5656 ix, ds, (const struct ath_desc *)bf->bf_daddr + i, 5657 ds->ds_link, ds->ds_data, 5658 !done ? "" : (rs->rs_status == 0) ? " *" : " !", 5659 ds->ds_ctl0, ds->ds_ctl1, 5660 ds->ds_hw[0], ds->ds_hw[1]); 5661 } 5662 } 5663 5664 static void 5665 ath_printtxbuf(const struct ath_buf *bf, u_int qnum, u_int ix, int done) 5666 { 5667 const struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 5668 const struct ath_desc *ds; 5669 int i; 5670 5671 printf("Q%u[%3u]", qnum, ix); 5672 for (i = 0, ds = bf->bf_desc; i < bf->bf_nseg; i++, ds++) { 5673 printf(" (DS.V:%p DS.P:%p) L:%08x D:%08x F:04%x%s\n" 5674 " %08x %08x %08x %08x %08x %08x\n", 5675 ds, (const struct ath_desc *)bf->bf_daddr + i, 5676 ds->ds_link, ds->ds_data, bf->bf_flags, 5677 !done ? "" : (ts->ts_status == 0) ? " *" : " !", 5678 ds->ds_ctl0, ds->ds_ctl1, 5679 ds->ds_hw[0], ds->ds_hw[1], ds->ds_hw[2], ds->ds_hw[3]); 5680 } 5681 } 5682 #endif /* ATH_DEBUG */ 5683 5684 static void 5685 ath_watchdog(struct ifnet *ifp) 5686 { 5687 struct ath_softc *sc = ifp->if_softc; 5688 5689 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) && !sc->sc_invalid) { 5690 if_printf(ifp, "device timeout\n"); 5691 ath_reset(ifp); 5692 ifp->if_oerrors++; 5693 sc->sc_stats.ast_watchdog++; 5694 } 5695 } 5696 5697 #ifdef ATH_DIAGAPI 5698 /* 5699 * Diagnostic interface to the HAL. This is used by various 5700 * tools to do things like retrieve register contents for 5701 * debugging. The mechanism is intentionally opaque so that 5702 * it can change frequently w/o concern for compatiblity. 5703 */ 5704 static int 5705 ath_ioctl_diag(struct ath_softc *sc, struct ath_diag *ad) 5706 { 5707 struct ath_hal *ah = sc->sc_ah; 5708 u_int id = ad->ad_id & ATH_DIAG_ID; 5709 void *indata = NULL; 5710 void *outdata = NULL; 5711 u_int32_t insize = ad->ad_in_size; 5712 u_int32_t outsize = ad->ad_out_size; 5713 int error = 0; 5714 5715 if (ad->ad_id & ATH_DIAG_IN) { 5716 /* 5717 * Copy in data. 5718 */ 5719 indata = malloc(insize, M_TEMP, M_NOWAIT); 5720 if (indata == NULL) { 5721 error = ENOMEM; 5722 goto bad; 5723 } 5724 error = copyin(ad->ad_in_data, indata, insize); 5725 if (error) 5726 goto bad; 5727 } 5728 if (ad->ad_id & ATH_DIAG_DYN) { 5729 /* 5730 * Allocate a buffer for the results (otherwise the HAL 5731 * returns a pointer to a buffer where we can read the 5732 * results). Note that we depend on the HAL leaving this 5733 * pointer for us to use below in reclaiming the buffer; 5734 * may want to be more defensive. 5735 */ 5736 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 5737 if (outdata == NULL) { 5738 error = ENOMEM; 5739 goto bad; 5740 } 5741 } 5742 if (ath_hal_getdiagstate(ah, id, indata, insize, &outdata, &outsize)) { 5743 if (outsize < ad->ad_out_size) 5744 ad->ad_out_size = outsize; 5745 if (outdata != NULL) 5746 error = copyout(outdata, ad->ad_out_data, 5747 ad->ad_out_size); 5748 } else { 5749 error = EINVAL; 5750 } 5751 bad: 5752 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 5753 free(indata, M_TEMP); 5754 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 5755 free(outdata, M_TEMP); 5756 return error; 5757 } 5758 #endif /* ATH_DIAGAPI */ 5759 5760 static int 5761 ath_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 5762 { 5763 #define IS_RUNNING(ifp) \ 5764 ((ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING)) 5765 struct ath_softc *sc = ifp->if_softc; 5766 struct ieee80211com *ic = &sc->sc_ic; 5767 struct ifreq *ifr = (struct ifreq *)data; 5768 int error = 0; 5769 5770 ATH_LOCK(sc); 5771 switch (cmd) { 5772 case SIOCSIFFLAGS: 5773 if (IS_RUNNING(ifp)) { 5774 /* 5775 * To avoid rescanning another access point, 5776 * do not call ath_init() here. Instead, 5777 * only reflect promisc mode settings. 5778 */ 5779 ath_mode_init(sc); 5780 } else if (ifp->if_flags & IFF_UP) { 5781 /* 5782 * Beware of being called during attach/detach 5783 * to reset promiscuous mode. In that case we 5784 * will still be marked UP but not RUNNING. 5785 * However trying to re-init the interface 5786 * is the wrong thing to do as we've already 5787 * torn down much of our state. There's 5788 * probably a better way to deal with this. 5789 */ 5790 if (!sc->sc_invalid && ic->ic_bss != NULL) 5791 ath_init(sc); /* XXX lose error */ 5792 } else 5793 ath_stop_locked(ifp); 5794 break; 5795 case SIOCADDMULTI: 5796 case SIOCDELMULTI: 5797 /* 5798 * The upper layer has already installed/removed 5799 * the multicast address(es), just recalculate the 5800 * multicast filter for the card. 5801 */ 5802 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 5803 ath_mode_init(sc); 5804 break; 5805 case SIOCGATHSTATS: 5806 /* NB: embed these numbers to get a consistent view */ 5807 sc->sc_stats.ast_tx_packets = ifp->if_opackets; 5808 sc->sc_stats.ast_rx_packets = ifp->if_ipackets; 5809 ieee80211_getsignal(ic, &sc->sc_stats.ast_rx_rssi, 5810 &sc->sc_stats.ast_rx_noise); 5811 sc->sc_stats.ast_tx_rate = sc->sc_hwmap[sc->sc_txrate].ieeerate; 5812 ATH_UNLOCK(sc); 5813 /* 5814 * NB: Drop the softc lock in case of a page fault; 5815 * we'll accept any potential inconsisentcy in the 5816 * statistics. The alternative is to copy the data 5817 * to a local structure. 5818 */ 5819 return copyout(&sc->sc_stats, 5820 ifr->ifr_data, sizeof (sc->sc_stats)); 5821 #ifdef ATH_DIAGAPI 5822 case SIOCGATHDIAG: 5823 ATH_UNLOCK(sc); 5824 error = ath_ioctl_diag(sc, (struct ath_diag *) ifr); 5825 ATH_LOCK(sc); 5826 break; 5827 #endif 5828 default: 5829 error = ieee80211_ioctl(ic, cmd, data); 5830 if (error == ENETRESET) { 5831 if (IS_RUNNING(ifp) && 5832 ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 5833 ath_init(sc); /* XXX lose error */ 5834 error = 0; 5835 } 5836 if (error == ERESTART) 5837 error = IS_RUNNING(ifp) ? ath_reset(ifp) : 0; 5838 break; 5839 } 5840 ATH_UNLOCK(sc); 5841 return error; 5842 #undef IS_RUNNING 5843 } 5844 5845 static int 5846 ath_sysctl_slottime(SYSCTL_HANDLER_ARGS) 5847 { 5848 struct ath_softc *sc = arg1; 5849 u_int slottime = ath_hal_getslottime(sc->sc_ah); 5850 int error; 5851 5852 error = sysctl_handle_int(oidp, &slottime, 0, req); 5853 if (error || !req->newptr) 5854 return error; 5855 return !ath_hal_setslottime(sc->sc_ah, slottime) ? EINVAL : 0; 5856 } 5857 5858 static int 5859 ath_sysctl_acktimeout(SYSCTL_HANDLER_ARGS) 5860 { 5861 struct ath_softc *sc = arg1; 5862 u_int acktimeout = ath_hal_getacktimeout(sc->sc_ah); 5863 int error; 5864 5865 error = sysctl_handle_int(oidp, &acktimeout, 0, req); 5866 if (error || !req->newptr) 5867 return error; 5868 return !ath_hal_setacktimeout(sc->sc_ah, acktimeout) ? EINVAL : 0; 5869 } 5870 5871 static int 5872 ath_sysctl_ctstimeout(SYSCTL_HANDLER_ARGS) 5873 { 5874 struct ath_softc *sc = arg1; 5875 u_int ctstimeout = ath_hal_getctstimeout(sc->sc_ah); 5876 int error; 5877 5878 error = sysctl_handle_int(oidp, &ctstimeout, 0, req); 5879 if (error || !req->newptr) 5880 return error; 5881 return !ath_hal_setctstimeout(sc->sc_ah, ctstimeout) ? EINVAL : 0; 5882 } 5883 5884 static int 5885 ath_sysctl_softled(SYSCTL_HANDLER_ARGS) 5886 { 5887 struct ath_softc *sc = arg1; 5888 int softled = sc->sc_softled; 5889 int error; 5890 5891 error = sysctl_handle_int(oidp, &softled, 0, req); 5892 if (error || !req->newptr) 5893 return error; 5894 softled = (softled != 0); 5895 if (softled != sc->sc_softled) { 5896 if (softled) { 5897 /* NB: handle any sc_ledpin change */ 5898 ath_hal_gpioCfgOutput(sc->sc_ah, sc->sc_ledpin); 5899 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, 5900 !sc->sc_ledon); 5901 } 5902 sc->sc_softled = softled; 5903 } 5904 return 0; 5905 } 5906 5907 static int 5908 ath_sysctl_ledpin(SYSCTL_HANDLER_ARGS) 5909 { 5910 struct ath_softc *sc = arg1; 5911 int ledpin = sc->sc_ledpin; 5912 int error; 5913 5914 error = sysctl_handle_int(oidp, &ledpin, 0, req); 5915 if (error || !req->newptr) 5916 return error; 5917 if (ledpin != sc->sc_ledpin) { 5918 sc->sc_ledpin = ledpin; 5919 if (sc->sc_softled) { 5920 ath_hal_gpioCfgOutput(sc->sc_ah, sc->sc_ledpin); 5921 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, 5922 !sc->sc_ledon); 5923 } 5924 } 5925 return 0; 5926 } 5927 5928 static int 5929 ath_sysctl_txantenna(SYSCTL_HANDLER_ARGS) 5930 { 5931 struct ath_softc *sc = arg1; 5932 u_int txantenna = ath_hal_getantennaswitch(sc->sc_ah); 5933 int error; 5934 5935 error = sysctl_handle_int(oidp, &txantenna, 0, req); 5936 if (!error && req->newptr) { 5937 /* XXX assumes 2 antenna ports */ 5938 if (txantenna < HAL_ANT_VARIABLE || txantenna > HAL_ANT_FIXED_B) 5939 return EINVAL; 5940 ath_hal_setantennaswitch(sc->sc_ah, txantenna); 5941 /* 5942 * NB: with the switch locked this isn't meaningful, 5943 * but set it anyway so things like radiotap get 5944 * consistent info in their data. 5945 */ 5946 sc->sc_txantenna = txantenna; 5947 } 5948 return error; 5949 } 5950 5951 static int 5952 ath_sysctl_rxantenna(SYSCTL_HANDLER_ARGS) 5953 { 5954 struct ath_softc *sc = arg1; 5955 u_int defantenna = ath_hal_getdefantenna(sc->sc_ah); 5956 int error; 5957 5958 error = sysctl_handle_int(oidp, &defantenna, 0, req); 5959 if (!error && req->newptr) 5960 ath_hal_setdefantenna(sc->sc_ah, defantenna); 5961 return error; 5962 } 5963 5964 static int 5965 ath_sysctl_diversity(SYSCTL_HANDLER_ARGS) 5966 { 5967 struct ath_softc *sc = arg1; 5968 u_int diversity = ath_hal_getdiversity(sc->sc_ah); 5969 int error; 5970 5971 error = sysctl_handle_int(oidp, &diversity, 0, req); 5972 if (error || !req->newptr) 5973 return error; 5974 if (!ath_hal_setdiversity(sc->sc_ah, diversity)) 5975 return EINVAL; 5976 sc->sc_diversity = diversity; 5977 return 0; 5978 } 5979 5980 static int 5981 ath_sysctl_diag(SYSCTL_HANDLER_ARGS) 5982 { 5983 struct ath_softc *sc = arg1; 5984 u_int32_t diag; 5985 int error; 5986 5987 if (!ath_hal_getdiag(sc->sc_ah, &diag)) 5988 return EINVAL; 5989 error = sysctl_handle_int(oidp, &diag, 0, req); 5990 if (error || !req->newptr) 5991 return error; 5992 return !ath_hal_setdiag(sc->sc_ah, diag) ? EINVAL : 0; 5993 } 5994 5995 static int 5996 ath_sysctl_tpscale(SYSCTL_HANDLER_ARGS) 5997 { 5998 struct ath_softc *sc = arg1; 5999 struct ifnet *ifp = sc->sc_ifp; 6000 u_int32_t scale; 6001 int error; 6002 6003 (void) ath_hal_gettpscale(sc->sc_ah, &scale); 6004 error = sysctl_handle_int(oidp, &scale, 0, req); 6005 if (error || !req->newptr) 6006 return error; 6007 return !ath_hal_settpscale(sc->sc_ah, scale) ? EINVAL : 6008 (ifp->if_drv_flags & IFF_DRV_RUNNING) ? ath_reset(ifp) : 0; 6009 } 6010 6011 static int 6012 ath_sysctl_tpc(SYSCTL_HANDLER_ARGS) 6013 { 6014 struct ath_softc *sc = arg1; 6015 u_int tpc = ath_hal_gettpc(sc->sc_ah); 6016 int error; 6017 6018 error = sysctl_handle_int(oidp, &tpc, 0, req); 6019 if (error || !req->newptr) 6020 return error; 6021 return !ath_hal_settpc(sc->sc_ah, tpc) ? EINVAL : 0; 6022 } 6023 6024 static int 6025 ath_sysctl_rfkill(SYSCTL_HANDLER_ARGS) 6026 { 6027 struct ath_softc *sc = arg1; 6028 struct ifnet *ifp = sc->sc_ifp; 6029 struct ath_hal *ah = sc->sc_ah; 6030 u_int rfkill = ath_hal_getrfkill(ah); 6031 int error; 6032 6033 error = sysctl_handle_int(oidp, &rfkill, 0, req); 6034 if (error || !req->newptr) 6035 return error; 6036 if (rfkill == ath_hal_getrfkill(ah)) /* unchanged */ 6037 return 0; 6038 if (!ath_hal_setrfkill(ah, rfkill)) 6039 return EINVAL; 6040 return (ifp->if_drv_flags & IFF_DRV_RUNNING) ? ath_reset(ifp) : 0; 6041 } 6042 6043 static int 6044 ath_sysctl_rfsilent(SYSCTL_HANDLER_ARGS) 6045 { 6046 struct ath_softc *sc = arg1; 6047 u_int rfsilent; 6048 int error; 6049 6050 (void) ath_hal_getrfsilent(sc->sc_ah, &rfsilent); 6051 error = sysctl_handle_int(oidp, &rfsilent, 0, req); 6052 if (error || !req->newptr) 6053 return error; 6054 if (!ath_hal_setrfsilent(sc->sc_ah, rfsilent)) 6055 return EINVAL; 6056 sc->sc_rfsilentpin = rfsilent & 0x1c; 6057 sc->sc_rfsilentpol = (rfsilent & 0x2) != 0; 6058 return 0; 6059 } 6060 6061 static int 6062 ath_sysctl_countrycode(SYSCTL_HANDLER_ARGS) 6063 { 6064 struct ath_softc *sc = arg1; 6065 u_int32_t cc = sc->sc_countrycode; 6066 struct ieee80211com *ic = &sc->sc_ic; 6067 int error; 6068 6069 error = sysctl_handle_int(oidp, &cc, 0, req); 6070 if (error || !req->newptr) 6071 return error; 6072 error = ath_getchannels(sc, sc->sc_regdomain, cc, 6073 sc->sc_outdoor != 0, sc->sc_xchanmode != 0); 6074 if (error != 0) 6075 return error; 6076 ieee80211_media_init(ic, ath_media_change, ieee80211_media_status); 6077 /* setcurmode? */ 6078 return 0; 6079 } 6080 6081 static int 6082 ath_sysctl_regdomain(SYSCTL_HANDLER_ARGS) 6083 { 6084 struct ath_softc *sc = arg1; 6085 u_int32_t rd = sc->sc_regdomain; 6086 struct ieee80211com *ic = &sc->sc_ic; 6087 int error; 6088 6089 error = sysctl_handle_int(oidp, &rd, 0, req); 6090 if (error || !req->newptr) 6091 return error; 6092 if (!ath_hal_setregdomain(sc->sc_ah, rd)) 6093 return EINVAL; 6094 error = ath_getchannels(sc, rd, sc->sc_countrycode, 6095 sc->sc_outdoor != 0, sc->sc_xchanmode != 0); 6096 if (error != 0) 6097 return error; 6098 ieee80211_media_init(ic, ath_media_change, ieee80211_media_status); 6099 /* setcurmode? */ 6100 return 0; 6101 } 6102 6103 static int 6104 ath_sysctl_tpack(SYSCTL_HANDLER_ARGS) 6105 { 6106 struct ath_softc *sc = arg1; 6107 u_int32_t tpack; 6108 int error; 6109 6110 (void) ath_hal_gettpack(sc->sc_ah, &tpack); 6111 error = sysctl_handle_int(oidp, &tpack, 0, req); 6112 if (error || !req->newptr) 6113 return error; 6114 return !ath_hal_settpack(sc->sc_ah, tpack) ? EINVAL : 0; 6115 } 6116 6117 static int 6118 ath_sysctl_tpcts(SYSCTL_HANDLER_ARGS) 6119 { 6120 struct ath_softc *sc = arg1; 6121 u_int32_t tpcts; 6122 int error; 6123 6124 (void) ath_hal_gettpcts(sc->sc_ah, &tpcts); 6125 error = sysctl_handle_int(oidp, &tpcts, 0, req); 6126 if (error || !req->newptr) 6127 return error; 6128 return !ath_hal_settpcts(sc->sc_ah, tpcts) ? EINVAL : 0; 6129 } 6130 6131 static void 6132 ath_sysctlattach(struct ath_softc *sc) 6133 { 6134 struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev); 6135 struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev); 6136 struct ath_hal *ah = sc->sc_ah; 6137 6138 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6139 "countrycode", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6140 ath_sysctl_countrycode, "I", "country code"); 6141 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6142 "regdomain", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6143 ath_sysctl_regdomain, "I", "EEPROM regdomain code"); 6144 #ifdef ATH_DEBUG 6145 sc->sc_debug = ath_debug; 6146 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6147 "debug", CTLFLAG_RW, &sc->sc_debug, 0, 6148 "control debugging printfs"); 6149 #endif 6150 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6151 "slottime", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6152 ath_sysctl_slottime, "I", "802.11 slot time (us)"); 6153 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6154 "acktimeout", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6155 ath_sysctl_acktimeout, "I", "802.11 ACK timeout (us)"); 6156 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6157 "ctstimeout", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6158 ath_sysctl_ctstimeout, "I", "802.11 CTS timeout (us)"); 6159 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6160 "softled", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6161 ath_sysctl_softled, "I", "enable/disable software LED support"); 6162 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6163 "ledpin", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6164 ath_sysctl_ledpin, "I", "GPIO pin connected to LED"); 6165 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6166 "ledon", CTLFLAG_RW, &sc->sc_ledon, 0, 6167 "setting to turn LED on"); 6168 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6169 "ledidle", CTLFLAG_RW, &sc->sc_ledidle, 0, 6170 "idle time for inactivity LED (ticks)"); 6171 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6172 "txantenna", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6173 ath_sysctl_txantenna, "I", "antenna switch"); 6174 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6175 "rxantenna", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6176 ath_sysctl_rxantenna, "I", "default/rx antenna"); 6177 if (ath_hal_hasdiversity(ah)) 6178 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6179 "diversity", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6180 ath_sysctl_diversity, "I", "antenna diversity"); 6181 sc->sc_txintrperiod = ATH_TXINTR_PERIOD; 6182 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6183 "txintrperiod", CTLFLAG_RW, &sc->sc_txintrperiod, 0, 6184 "tx descriptor batching"); 6185 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6186 "diag", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6187 ath_sysctl_diag, "I", "h/w diagnostic control"); 6188 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6189 "tpscale", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6190 ath_sysctl_tpscale, "I", "tx power scaling"); 6191 if (ath_hal_hastpc(ah)) { 6192 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6193 "tpc", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6194 ath_sysctl_tpc, "I", "enable/disable per-packet TPC"); 6195 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6196 "tpack", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6197 ath_sysctl_tpack, "I", "tx power for ack frames"); 6198 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6199 "tpcts", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6200 ath_sysctl_tpcts, "I", "tx power for cts frames"); 6201 } 6202 if (ath_hal_hasfastframes(sc->sc_ah)) { 6203 sc->sc_fftxqmin = ATH_FF_TXQMIN; 6204 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6205 "fftxqmin", CTLFLAG_RW, &sc->sc_fftxqmin, 0, 6206 "min frames before fast-frame staging"); 6207 sc->sc_fftxqmax = ATH_FF_TXQMAX; 6208 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6209 "fftxqmax", CTLFLAG_RW, &sc->sc_fftxqmax, 0, 6210 "max queued frames before tail drop"); 6211 } 6212 if (ath_hal_hasrfsilent(ah)) { 6213 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6214 "rfsilent", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6215 ath_sysctl_rfsilent, "I", "h/w RF silent config"); 6216 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6217 "rfkill", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 6218 ath_sysctl_rfkill, "I", "enable/disable RF kill switch"); 6219 } 6220 sc->sc_monpass = HAL_RXERR_DECRYPT | HAL_RXERR_MIC; 6221 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 6222 "monpass", CTLFLAG_RW, &sc->sc_monpass, 0, 6223 "mask of error frames to pass when monitoring"); 6224 } 6225 6226 static void 6227 ath_bpfattach(struct ath_softc *sc) 6228 { 6229 struct ifnet *ifp = sc->sc_ifp; 6230 6231 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 6232 sizeof(struct ieee80211_frame) + sizeof(sc->sc_tx_th), 6233 &sc->sc_drvbpf); 6234 /* 6235 * Initialize constant fields. 6236 * XXX make header lengths a multiple of 32-bits so subsequent 6237 * headers are properly aligned; this is a kludge to keep 6238 * certain applications happy. 6239 * 6240 * NB: the channel is setup each time we transition to the 6241 * RUN state to avoid filling it in for each frame. 6242 */ 6243 sc->sc_tx_th_len = roundup(sizeof(sc->sc_tx_th), sizeof(u_int32_t)); 6244 sc->sc_tx_th.wt_ihdr.it_len = htole16(sc->sc_tx_th_len); 6245 sc->sc_tx_th.wt_ihdr.it_present = htole32(ATH_TX_RADIOTAP_PRESENT); 6246 6247 sc->sc_rx_th_len = roundup(sizeof(sc->sc_rx_th), sizeof(u_int32_t)); 6248 sc->sc_rx_th.wr_ihdr.it_len = htole16(sc->sc_rx_th_len); 6249 sc->sc_rx_th.wr_ihdr.it_present = htole32(ATH_RX_RADIOTAP_PRESENT); 6250 } 6251 6252 static int 6253 ath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 6254 struct ath_buf *bf, struct mbuf *m0, 6255 const struct ieee80211_bpf_params *params) 6256 { 6257 struct ieee80211com *ic = &sc->sc_ic; 6258 struct ath_hal *ah = sc->sc_ah; 6259 int error, ismcast, ismrr; 6260 int hdrlen, pktlen, try0, txantenna; 6261 u_int8_t rix, cix, txrate, ctsrate, rate1, rate2, rate3; 6262 struct ath_txq *txq; 6263 struct ieee80211_frame *wh; 6264 u_int flags, ctsduration; 6265 HAL_PKT_TYPE atype; 6266 const HAL_RATE_TABLE *rt; 6267 struct ath_desc *ds; 6268 u_int pri; 6269 6270 wh = mtod(m0, struct ieee80211_frame *); 6271 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 6272 hdrlen = ieee80211_anyhdrsize(wh); 6273 /* 6274 * Packet length must not include any 6275 * pad bytes; deduct them here. 6276 */ 6277 /* XXX honor IEEE80211_BPF_DATAPAD */ 6278 pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 6279 6280 error = ath_tx_dmasetup(sc, bf, m0); 6281 if (error != 0) 6282 return error; 6283 m0 = bf->bf_m; /* NB: may have changed */ 6284 wh = mtod(m0, struct ieee80211_frame *); 6285 bf->bf_node = ni; /* NB: held reference */ 6286 6287 flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 6288 flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 6289 if (params->ibp_flags & IEEE80211_BPF_RTS) 6290 flags |= HAL_TXDESC_RTSENA; 6291 else if (params->ibp_flags & IEEE80211_BPF_CTS) 6292 flags |= HAL_TXDESC_CTSENA; 6293 /* XXX leave ismcast to injector? */ 6294 if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 6295 flags |= HAL_TXDESC_NOACK; 6296 6297 rt = sc->sc_currates; 6298 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 6299 rix = ath_tx_findrix(rt, params->ibp_rate0); 6300 txrate = rt->info[rix].rateCode; 6301 if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 6302 txrate |= rt->info[rix].shortPreamble; 6303 sc->sc_txrate = txrate; 6304 try0 = params->ibp_try0; 6305 ismrr = (params->ibp_try1 != 0); 6306 txantenna = params->ibp_pri >> 2; 6307 if (txantenna == 0) /* XXX? */ 6308 txantenna = sc->sc_txantenna; 6309 ctsduration = 0; 6310 if (flags & (HAL_TXDESC_CTSENA | HAL_TXDESC_RTSENA)) { 6311 cix = ath_tx_findrix(rt, params->ibp_ctsrate); 6312 ctsrate = rt->info[cix].rateCode; 6313 if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) { 6314 ctsrate |= rt->info[cix].shortPreamble; 6315 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 6316 ctsduration += rt->info[cix].spAckDuration; 6317 ctsduration += ath_hal_computetxtime(ah, 6318 rt, pktlen, rix, AH_TRUE); 6319 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 6320 ctsduration += rt->info[rix].spAckDuration; 6321 } else { 6322 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 6323 ctsduration += rt->info[cix].lpAckDuration; 6324 ctsduration += ath_hal_computetxtime(ah, 6325 rt, pktlen, rix, AH_FALSE); 6326 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 6327 ctsduration += rt->info[rix].lpAckDuration; 6328 } 6329 ismrr = 0; /* XXX */ 6330 } else 6331 ctsrate = 0; 6332 pri = params->ibp_pri & 3; 6333 /* 6334 * NB: we mark all packets as type PSPOLL so the h/w won't 6335 * set the sequence number, duration, etc. 6336 */ 6337 atype = HAL_PKT_TYPE_PSPOLL; 6338 6339 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 6340 ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 6341 sc->sc_hwmap[txrate].ieeerate, -1); 6342 6343 if (bpf_peers_present(ic->ic_rawbpf)) 6344 bpf_mtap(ic->ic_rawbpf, m0); 6345 if (bpf_peers_present(sc->sc_drvbpf)) { 6346 u_int64_t tsf = ath_hal_gettsf64(ah); 6347 6348 sc->sc_tx_th.wt_tsf = htole64(tsf); 6349 sc->sc_tx_th.wt_flags = sc->sc_hwmap[txrate].txflags; 6350 if (wh->i_fc[1] & IEEE80211_FC1_WEP) 6351 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 6352 sc->sc_tx_th.wt_rate = sc->sc_hwmap[txrate].ieeerate; 6353 sc->sc_tx_th.wt_txpower = ni->ni_txpower; 6354 sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 6355 6356 bpf_mtap2(sc->sc_drvbpf, 6357 &sc->sc_tx_th, sc->sc_tx_th_len, m0); 6358 } 6359 6360 /* 6361 * Formulate first tx descriptor with tx controls. 6362 */ 6363 ds = bf->bf_desc; 6364 /* XXX check return value? */ 6365 ath_hal_setuptxdesc(ah, ds 6366 , pktlen /* packet length */ 6367 , hdrlen /* header length */ 6368 , atype /* Atheros packet type */ 6369 , params->ibp_power /* txpower */ 6370 , txrate, try0 /* series 0 rate/tries */ 6371 , HAL_TXKEYIX_INVALID /* key cache index */ 6372 , txantenna /* antenna mode */ 6373 , flags /* flags */ 6374 , ctsrate /* rts/cts rate */ 6375 , ctsduration /* rts/cts duration */ 6376 ); 6377 bf->bf_flags = flags; 6378 6379 if (ismrr) { 6380 rix = ath_tx_findrix(rt, params->ibp_rate1); 6381 rate1 = rt->info[rix].rateCode; 6382 if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 6383 rate1 |= rt->info[rix].shortPreamble; 6384 if (params->ibp_try2) { 6385 rix = ath_tx_findrix(rt, params->ibp_rate2); 6386 rate2 = rt->info[rix].rateCode; 6387 if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 6388 rate2 |= rt->info[rix].shortPreamble; 6389 } else 6390 rate2 = 0; 6391 if (params->ibp_try3) { 6392 rix = ath_tx_findrix(rt, params->ibp_rate3); 6393 rate3 = rt->info[rix].rateCode; 6394 if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 6395 rate3 |= rt->info[rix].shortPreamble; 6396 } else 6397 rate3 = 0; 6398 ath_hal_setupxtxdesc(ah, ds 6399 , rate1, params->ibp_try1 /* series 1 */ 6400 , rate2, params->ibp_try2 /* series 2 */ 6401 , rate3, params->ibp_try3 /* series 3 */ 6402 ); 6403 } 6404 6405 /* 6406 * When servicing one or more stations in power-save mode 6407 * (or) if there is some mcast data waiting on the mcast 6408 * queue (to prevent out of order delivery) multicast 6409 * frames must be buffered until after the beacon. 6410 */ 6411 txq = sc->sc_ac2q[pri]; 6412 if (ismcast && (ic->ic_ps_sta || sc->sc_mcastq.axq_depth)) 6413 txq = &sc->sc_mcastq; 6414 ath_tx_handoff(sc, txq, bf); 6415 return 0; 6416 } 6417 6418 static int 6419 ath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 6420 const struct ieee80211_bpf_params *params) 6421 { 6422 struct ieee80211com *ic = ni->ni_ic; 6423 struct ifnet *ifp = ic->ic_ifp; 6424 struct ath_softc *sc = ifp->if_softc; 6425 struct ath_buf *bf; 6426 6427 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 6428 ieee80211_free_node(ni); 6429 m_freem(m); 6430 return ENETDOWN; 6431 } 6432 /* 6433 * Grab a TX buffer and associated resources. 6434 */ 6435 ATH_TXBUF_LOCK(sc); 6436 bf = STAILQ_FIRST(&sc->sc_txbuf); 6437 if (bf != NULL) 6438 STAILQ_REMOVE_HEAD(&sc->sc_txbuf, bf_list); 6439 ATH_TXBUF_UNLOCK(sc); 6440 if (bf == NULL) { 6441 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: out of xmit buffers\n", 6442 __func__); 6443 sc->sc_stats.ast_tx_qstop++; 6444 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 6445 ieee80211_free_node(ni); 6446 m_freem(m); 6447 return ENOBUFS; 6448 } 6449 6450 ifp->if_opackets++; 6451 sc->sc_stats.ast_tx_raw++; 6452 6453 if (params == NULL) { 6454 /* 6455 * Legacy path; interpret frame contents to decide 6456 * precisely how to send the frame. 6457 */ 6458 if (ath_tx_start(sc, ni, bf, m)) 6459 goto bad; 6460 } else { 6461 /* 6462 * Caller supplied explicit parameters to use in 6463 * sending the frame. 6464 */ 6465 if (ath_tx_raw_start(sc, ni, bf, m, params)) 6466 goto bad; 6467 } 6468 ifp->if_timer = 5; 6469 6470 return 0; 6471 bad: 6472 ifp->if_oerrors++; 6473 ATH_TXBUF_LOCK(sc); 6474 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 6475 ATH_TXBUF_UNLOCK(sc); 6476 ieee80211_free_node(ni); 6477 return EIO; /* XXX */ 6478 } 6479 6480 /* 6481 * Announce various information on device/driver attach. 6482 */ 6483 static void 6484 ath_announce(struct ath_softc *sc) 6485 { 6486 #define HAL_MODE_DUALBAND (HAL_MODE_11A|HAL_MODE_11B) 6487 struct ifnet *ifp = sc->sc_ifp; 6488 struct ath_hal *ah = sc->sc_ah; 6489 u_int modes, cc; 6490 6491 if_printf(ifp, "mac %d.%d phy %d.%d", 6492 ah->ah_macVersion, ah->ah_macRev, 6493 ah->ah_phyRev >> 4, ah->ah_phyRev & 0xf); 6494 /* 6495 * Print radio revision(s). We check the wireless modes 6496 * to avoid falsely printing revs for inoperable parts. 6497 * Dual-band radio revs are returned in the 5Ghz rev number. 6498 */ 6499 ath_hal_getcountrycode(ah, &cc); 6500 modes = ath_hal_getwirelessmodes(ah, cc); 6501 if ((modes & HAL_MODE_DUALBAND) == HAL_MODE_DUALBAND) { 6502 if (ah->ah_analog5GhzRev && ah->ah_analog2GhzRev) 6503 printf(" 5ghz radio %d.%d 2ghz radio %d.%d", 6504 ah->ah_analog5GhzRev >> 4, 6505 ah->ah_analog5GhzRev & 0xf, 6506 ah->ah_analog2GhzRev >> 4, 6507 ah->ah_analog2GhzRev & 0xf); 6508 else 6509 printf(" radio %d.%d", ah->ah_analog5GhzRev >> 4, 6510 ah->ah_analog5GhzRev & 0xf); 6511 } else 6512 printf(" radio %d.%d", ah->ah_analog5GhzRev >> 4, 6513 ah->ah_analog5GhzRev & 0xf); 6514 printf("\n"); 6515 if (bootverbose) { 6516 int i; 6517 for (i = 0; i <= WME_AC_VO; i++) { 6518 struct ath_txq *txq = sc->sc_ac2q[i]; 6519 if_printf(ifp, "Use hw queue %u for %s traffic\n", 6520 txq->axq_qnum, ieee80211_wme_acnames[i]); 6521 } 6522 if_printf(ifp, "Use hw queue %u for CAB traffic\n", 6523 sc->sc_cabq->axq_qnum); 6524 if_printf(ifp, "Use hw queue %u for beacons\n", sc->sc_bhalq); 6525 } 6526 if (ath_rxbuf != ATH_RXBUF) 6527 if_printf(ifp, "using %u rx buffers\n", ath_rxbuf); 6528 if (ath_txbuf != ATH_TXBUF) 6529 if_printf(ifp, "using %u tx buffers\n", ath_txbuf); 6530 #undef HAL_MODE_DUALBAND 6531 } 6532