1 /*- 2 * Copyright (c) 2002-2005 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 * 3. Neither the names of the above-listed copyright holders nor the names 16 * of any contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * Alternatively, this software may be distributed under the terms of the 20 * GNU General Public License ("GPL") version 2 as published by the Free 21 * Software Foundation. 22 * 23 * NO WARRANTY 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 27 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 28 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 29 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 32 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 34 * THE POSSIBILITY OF SUCH DAMAGES. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 /* 41 * Driver for the Atheros Wireless LAN controller. 42 * 43 * This software is derived from work of Atsushi Onoe; his contribution 44 * is greatly appreciated. 45 */ 46 47 #include "opt_inet.h" 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/sysctl.h> 52 #include <sys/mbuf.h> 53 #include <sys/malloc.h> 54 #include <sys/lock.h> 55 #include <sys/mutex.h> 56 #include <sys/kernel.h> 57 #include <sys/socket.h> 58 #include <sys/sockio.h> 59 #include <sys/errno.h> 60 #include <sys/callout.h> 61 #include <sys/bus.h> 62 #include <sys/endian.h> 63 64 #include <machine/bus.h> 65 66 #include <net/if.h> 67 #include <net/if_dl.h> 68 #include <net/if_media.h> 69 #include <net/if_arp.h> 70 #include <net/ethernet.h> 71 #include <net/if_llc.h> 72 73 #include <net80211/ieee80211_var.h> 74 75 #include <net/bpf.h> 76 77 #ifdef INET 78 #include <netinet/in.h> 79 #include <netinet/if_ether.h> 80 #endif 81 82 #define AR_DEBUG 83 #include <dev/ath/if_athvar.h> 84 #include <contrib/dev/ath/ah_desc.h> 85 #include <contrib/dev/ath/ah_devid.h> /* XXX for softled */ 86 87 /* unalligned 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 void ath_initkeytable(struct ath_softc *); 114 static int ath_key_alloc(struct ieee80211com *, 115 const struct ieee80211_key *); 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_setup(struct ath_softc *, struct ath_buf *); 128 static void ath_beacon_proc(void *, int); 129 static void ath_bstuck_proc(void *, int); 130 static void ath_beacon_free(struct ath_softc *); 131 static void ath_beacon_config(struct ath_softc *); 132 static void ath_descdma_cleanup(struct ath_softc *sc, 133 struct ath_descdma *, ath_bufhead *); 134 static int ath_desc_alloc(struct ath_softc *); 135 static void ath_desc_free(struct ath_softc *); 136 static struct ieee80211_node *ath_node_alloc(struct ieee80211_node_table *); 137 static void ath_node_free(struct ieee80211_node *); 138 static u_int8_t ath_node_getrssi(const struct ieee80211_node *); 139 static int ath_rxbuf_init(struct ath_softc *, struct ath_buf *); 140 static void ath_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 141 struct ieee80211_node *ni, 142 int subtype, int rssi, u_int32_t rstamp); 143 static void ath_setdefantenna(struct ath_softc *, u_int); 144 static void ath_rx_proc(void *, int); 145 static struct ath_txq *ath_txq_setup(struct ath_softc*, int qtype, int subtype); 146 static int ath_tx_setup(struct ath_softc *, int, int); 147 static int ath_wme_update(struct ieee80211com *); 148 static void ath_tx_cleanupq(struct ath_softc *, struct ath_txq *); 149 static void ath_tx_cleanup(struct ath_softc *); 150 static int ath_tx_start(struct ath_softc *, struct ieee80211_node *, 151 struct ath_buf *, struct mbuf *); 152 static void ath_tx_proc_q0(void *, int); 153 static void ath_tx_proc_q0123(void *, int); 154 static void ath_tx_proc(void *, int); 155 static int ath_chan_set(struct ath_softc *, struct ieee80211_channel *); 156 static void ath_draintxq(struct ath_softc *); 157 static void ath_stoprecv(struct ath_softc *); 158 static int ath_startrecv(struct ath_softc *); 159 static void ath_chan_change(struct ath_softc *, struct ieee80211_channel *); 160 static void ath_next_scan(void *); 161 static void ath_calibrate(void *); 162 static int ath_newstate(struct ieee80211com *, enum ieee80211_state, int); 163 static void ath_newassoc(struct ieee80211com *, 164 struct ieee80211_node *, int); 165 static int ath_getchannels(struct ath_softc *, u_int cc, 166 HAL_BOOL outdoor, HAL_BOOL xchanmode); 167 static void ath_led_event(struct ath_softc *, int); 168 static void ath_update_txpow(struct ath_softc *); 169 170 static int ath_rate_setup(struct ath_softc *, u_int mode); 171 static void ath_setcurmode(struct ath_softc *, enum ieee80211_phymode); 172 173 static void ath_sysctlattach(struct ath_softc *); 174 static void ath_bpfattach(struct ath_softc *); 175 static void ath_announce(struct ath_softc *); 176 177 SYSCTL_DECL(_hw_ath); 178 179 /* XXX validate sysctl values */ 180 static int ath_dwelltime = 200; /* 5 channels/second */ 181 SYSCTL_INT(_hw_ath, OID_AUTO, dwell, CTLFLAG_RW, &ath_dwelltime, 182 0, "channel dwell time (ms) for AP/station scanning"); 183 static int ath_calinterval = 30; /* calibrate every 30 secs */ 184 SYSCTL_INT(_hw_ath, OID_AUTO, calibrate, CTLFLAG_RW, &ath_calinterval, 185 0, "chip calibration interval (secs)"); 186 static int ath_outdoor = AH_TRUE; /* outdoor operation */ 187 SYSCTL_INT(_hw_ath, OID_AUTO, outdoor, CTLFLAG_RD, &ath_outdoor, 188 0, "outdoor operation"); 189 TUNABLE_INT("hw.ath.outdoor", &ath_outdoor); 190 static int ath_xchanmode = AH_TRUE; /* extended channel use */ 191 SYSCTL_INT(_hw_ath, OID_AUTO, xchanmode, CTLFLAG_RD, &ath_xchanmode, 192 0, "extended channel mode"); 193 TUNABLE_INT("hw.ath.xchanmode", &ath_xchanmode); 194 static int ath_countrycode = CTRY_DEFAULT; /* country code */ 195 SYSCTL_INT(_hw_ath, OID_AUTO, countrycode, CTLFLAG_RD, &ath_countrycode, 196 0, "country code"); 197 TUNABLE_INT("hw.ath.countrycode", &ath_countrycode); 198 static int ath_regdomain = 0; /* regulatory domain */ 199 SYSCTL_INT(_hw_ath, OID_AUTO, regdomain, CTLFLAG_RD, &ath_regdomain, 200 0, "regulatory domain"); 201 202 #ifdef AR_DEBUG 203 static int ath_debug = 0; 204 SYSCTL_INT(_hw_ath, OID_AUTO, debug, CTLFLAG_RW, &ath_debug, 205 0, "control debugging printfs"); 206 TUNABLE_INT("hw.ath.debug", &ath_debug); 207 enum { 208 ATH_DEBUG_XMIT = 0x00000001, /* basic xmit operation */ 209 ATH_DEBUG_XMIT_DESC = 0x00000002, /* xmit descriptors */ 210 ATH_DEBUG_RECV = 0x00000004, /* basic recv operation */ 211 ATH_DEBUG_RECV_DESC = 0x00000008, /* recv descriptors */ 212 ATH_DEBUG_RATE = 0x00000010, /* rate control */ 213 ATH_DEBUG_RESET = 0x00000020, /* reset processing */ 214 ATH_DEBUG_MODE = 0x00000040, /* mode init/setup */ 215 ATH_DEBUG_BEACON = 0x00000080, /* beacon handling */ 216 ATH_DEBUG_WATCHDOG = 0x00000100, /* watchdog timeout */ 217 ATH_DEBUG_INTR = 0x00001000, /* ISR */ 218 ATH_DEBUG_TX_PROC = 0x00002000, /* tx ISR proc */ 219 ATH_DEBUG_RX_PROC = 0x00004000, /* rx ISR proc */ 220 ATH_DEBUG_BEACON_PROC = 0x00008000, /* beacon ISR proc */ 221 ATH_DEBUG_CALIBRATE = 0x00010000, /* periodic calibration */ 222 ATH_DEBUG_KEYCACHE = 0x00020000, /* key cache management */ 223 ATH_DEBUG_STATE = 0x00040000, /* 802.11 state transitions */ 224 ATH_DEBUG_NODE = 0x00080000, /* node management */ 225 ATH_DEBUG_LED = 0x00100000, /* led management */ 226 ATH_DEBUG_FATAL = 0x80000000, /* fatal errors */ 227 ATH_DEBUG_ANY = 0xffffffff 228 }; 229 #define IFF_DUMPPKTS(sc, m) \ 230 ((sc->sc_debug & (m)) || \ 231 (sc->sc_if.if_flags & (IFF_DEBUG|IFF_LINK2)) == (IFF_DEBUG|IFF_LINK2)) 232 #define DPRINTF(sc, m, fmt, ...) do { \ 233 if (sc->sc_debug & (m)) \ 234 printf(fmt, __VA_ARGS__); \ 235 } while (0) 236 #define KEYPRINTF(sc, ix, hk, mac) do { \ 237 if (sc->sc_debug & ATH_DEBUG_KEYCACHE) \ 238 ath_keyprint(__func__, ix, hk, mac); \ 239 } while (0) 240 static void ath_printrxbuf(struct ath_buf *bf, int); 241 static void ath_printtxbuf(struct ath_buf *bf, int); 242 #else 243 #define IFF_DUMPPKTS(sc, m) \ 244 ((sc->sc_if.if_flags & (IFF_DEBUG|IFF_LINK2)) == (IFF_DEBUG|IFF_LINK2)) 245 #define DPRINTF(m, fmt, ...) 246 #define KEYPRINTF(sc, k, ix, mac) 247 #endif 248 249 MALLOC_DEFINE(M_ATHDEV, "athdev", "ath driver dma buffers"); 250 251 int 252 ath_attach(u_int16_t devid, struct ath_softc *sc) 253 { 254 struct ifnet *ifp = &sc->sc_if; 255 struct ieee80211com *ic = &sc->sc_ic; 256 struct ath_hal *ah; 257 HAL_STATUS status; 258 int error = 0, i; 259 260 DPRINTF(sc, ATH_DEBUG_ANY, "%s: devid 0x%x\n", __func__, devid); 261 262 /* set these up early for if_printf use */ 263 if_initname(ifp, device_get_name(sc->sc_dev), 264 device_get_unit(sc->sc_dev)); 265 266 ah = ath_hal_attach(devid, sc, sc->sc_st, sc->sc_sh, &status); 267 if (ah == NULL) { 268 if_printf(ifp, "unable to attach hardware; HAL status %u\n", 269 status); 270 error = ENXIO; 271 goto bad; 272 } 273 if (ah->ah_abi != HAL_ABI_VERSION) { 274 if_printf(ifp, "HAL ABI mismatch detected " 275 "(HAL:0x%x != driver:0x%x)\n", 276 ah->ah_abi, HAL_ABI_VERSION); 277 error = ENXIO; 278 goto bad; 279 } 280 sc->sc_ah = ah; 281 sc->sc_invalid = 0; /* ready to go, enable interrupt handling */ 282 283 /* 284 * Check if the MAC has multi-rate retry support. 285 * We do this by trying to setup a fake extended 286 * descriptor. MAC's that don't have support will 287 * return false w/o doing anything. MAC's that do 288 * support it will return true w/o doing anything. 289 */ 290 sc->sc_mrretry = ath_hal_setupxtxdesc(ah, NULL, 0,0, 0,0, 0,0); 291 292 /* 293 * Check if the device has hardware counters for PHY 294 * errors. If so we need to enable the MIB interrupt 295 * so we can act on stat triggers. 296 */ 297 if (ath_hal_hwphycounters(ah)) 298 sc->sc_needmib = 1; 299 300 /* 301 * Get the hardware key cache size. 302 */ 303 sc->sc_keymax = ath_hal_keycachesize(ah); 304 if (sc->sc_keymax > sizeof(sc->sc_keymap) * NBBY) { 305 if_printf(ifp, 306 "Warning, using only %zu of %u key cache slots\n", 307 sizeof(sc->sc_keymap) * NBBY, sc->sc_keymax); 308 sc->sc_keymax = sizeof(sc->sc_keymap) * NBBY; 309 } 310 /* 311 * Reset the key cache since some parts do not 312 * reset the contents on initial power up. 313 */ 314 for (i = 0; i < sc->sc_keymax; i++) 315 ath_hal_keyreset(ah, i); 316 /* 317 * Mark key cache slots associated with global keys 318 * as in use. If we knew TKIP was not to be used we 319 * could leave the +32, +64, and +32+64 slots free. 320 * XXX only for splitmic. 321 */ 322 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 323 setbit(sc->sc_keymap, i); 324 setbit(sc->sc_keymap, i+32); 325 setbit(sc->sc_keymap, i+64); 326 setbit(sc->sc_keymap, i+32+64); 327 } 328 329 /* 330 * Collect the channel list using the default country 331 * code and including outdoor channels. The 802.11 layer 332 * is resposible for filtering this list based on settings 333 * like the phy mode. 334 */ 335 error = ath_getchannels(sc, ath_countrycode, 336 ath_outdoor, ath_xchanmode); 337 if (error != 0) 338 goto bad; 339 /* 340 * Setup dynamic sysctl's now that country code and 341 * regdomain are available from the hal. 342 */ 343 ath_sysctlattach(sc); 344 345 /* 346 * Setup rate tables for all potential media types. 347 */ 348 ath_rate_setup(sc, IEEE80211_MODE_11A); 349 ath_rate_setup(sc, IEEE80211_MODE_11B); 350 ath_rate_setup(sc, IEEE80211_MODE_11G); 351 ath_rate_setup(sc, IEEE80211_MODE_TURBO_A); 352 ath_rate_setup(sc, IEEE80211_MODE_TURBO_G); 353 /* NB: setup here so ath_rate_update is happy */ 354 ath_setcurmode(sc, IEEE80211_MODE_11A); 355 356 /* 357 * Allocate tx+rx descriptors and populate the lists. 358 */ 359 error = ath_desc_alloc(sc); 360 if (error != 0) { 361 if_printf(ifp, "failed to allocate descriptors: %d\n", error); 362 goto bad; 363 } 364 callout_init(&sc->sc_scan_ch, debug_mpsafenet ? CALLOUT_MPSAFE : 0); 365 callout_init(&sc->sc_cal_ch, CALLOUT_MPSAFE); 366 367 ATH_TXBUF_LOCK_INIT(sc); 368 369 TASK_INIT(&sc->sc_rxtask, 0, ath_rx_proc, sc); 370 TASK_INIT(&sc->sc_rxorntask, 0, ath_rxorn_proc, sc); 371 TASK_INIT(&sc->sc_fataltask, 0, ath_fatal_proc, sc); 372 TASK_INIT(&sc->sc_bmisstask, 0, ath_bmiss_proc, sc); 373 TASK_INIT(&sc->sc_bstucktask, 0, ath_bstuck_proc, sc); 374 375 /* 376 * Allocate hardware transmit queues: one queue for 377 * beacon frames and one data queue for each QoS 378 * priority. Note that the hal handles reseting 379 * these queues at the needed time. 380 * 381 * XXX PS-Poll 382 */ 383 sc->sc_bhalq = ath_beaconq_setup(ah); 384 if (sc->sc_bhalq == (u_int) -1) { 385 if_printf(ifp, "unable to setup a beacon xmit queue!\n"); 386 error = EIO; 387 goto bad2; 388 } 389 sc->sc_cabq = ath_txq_setup(sc, HAL_TX_QUEUE_CAB, 0); 390 if (sc->sc_cabq == NULL) { 391 if_printf(ifp, "unable to setup CAB xmit queue!\n"); 392 error = EIO; 393 goto bad2; 394 } 395 /* NB: insure BK queue is the lowest priority h/w queue */ 396 if (!ath_tx_setup(sc, WME_AC_BK, HAL_WME_AC_BK)) { 397 if_printf(ifp, "unable to setup xmit queue for %s traffic!\n", 398 ieee80211_wme_acnames[WME_AC_BK]); 399 error = EIO; 400 goto bad2; 401 } 402 if (!ath_tx_setup(sc, WME_AC_BE, HAL_WME_AC_BE) || 403 !ath_tx_setup(sc, WME_AC_VI, HAL_WME_AC_VI) || 404 !ath_tx_setup(sc, WME_AC_VO, HAL_WME_AC_VO)) { 405 /* 406 * Not enough hardware tx queues to properly do WME; 407 * just punt and assign them all to the same h/w queue. 408 * We could do a better job of this if, for example, 409 * we allocate queues when we switch from station to 410 * AP mode. 411 */ 412 if (sc->sc_ac2q[WME_AC_VI] != NULL) 413 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_VI]); 414 if (sc->sc_ac2q[WME_AC_BE] != NULL) 415 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_BE]); 416 sc->sc_ac2q[WME_AC_BE] = sc->sc_ac2q[WME_AC_BK]; 417 sc->sc_ac2q[WME_AC_VI] = sc->sc_ac2q[WME_AC_BK]; 418 sc->sc_ac2q[WME_AC_VO] = sc->sc_ac2q[WME_AC_BK]; 419 } 420 421 /* 422 * Special case certain configurations. Note the 423 * CAB queue is handled by these specially so don't 424 * include them when checking the txq setup mask. 425 */ 426 switch (sc->sc_txqsetup &~ (1<<sc->sc_cabq->axq_qnum)) { 427 case 0x01: 428 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0, sc); 429 break; 430 case 0x0f: 431 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0123, sc); 432 break; 433 default: 434 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc, sc); 435 break; 436 } 437 438 /* 439 * Setup rate control. Some rate control modules 440 * call back to change the anntena state so expose 441 * the necessary entry points. 442 * XXX maybe belongs in struct ath_ratectrl? 443 */ 444 sc->sc_setdefantenna = ath_setdefantenna; 445 sc->sc_rc = ath_rate_attach(sc); 446 if (sc->sc_rc == NULL) { 447 error = EIO; 448 goto bad2; 449 } 450 451 sc->sc_blinking = 0; 452 sc->sc_ledstate = 1; 453 sc->sc_ledon = 0; /* low true */ 454 sc->sc_ledidle = (2700*hz)/1000; /* 2.7sec */ 455 callout_init(&sc->sc_ledtimer, CALLOUT_MPSAFE); 456 /* 457 * Auto-enable soft led processing for IBM cards and for 458 * 5211 minipci cards. Users can also manually enable/disable 459 * support with a sysctl. 460 */ 461 sc->sc_softled = (devid == AR5212_DEVID_IBM || devid == AR5211_DEVID); 462 if (sc->sc_softled) { 463 ath_hal_gpioCfgOutput(ah, sc->sc_ledpin); 464 ath_hal_gpioset(ah, sc->sc_ledpin, !sc->sc_ledon); 465 } 466 467 ifp->if_softc = sc; 468 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 469 ifp->if_start = ath_start; 470 ifp->if_watchdog = ath_watchdog; 471 ifp->if_ioctl = ath_ioctl; 472 ifp->if_init = ath_init; 473 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 474 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 475 IFQ_SET_READY(&ifp->if_snd); 476 477 ic->ic_ifp = ifp; 478 ic->ic_reset = ath_reset; 479 ic->ic_newassoc = ath_newassoc; 480 ic->ic_updateslot = ath_updateslot; 481 ic->ic_wme.wme_update = ath_wme_update; 482 /* XXX not right but it's not used anywhere important */ 483 ic->ic_phytype = IEEE80211_T_OFDM; 484 ic->ic_opmode = IEEE80211_M_STA; 485 ic->ic_caps = 486 IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ 487 | IEEE80211_C_HOSTAP /* hostap mode */ 488 | IEEE80211_C_MONITOR /* monitor mode */ 489 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 490 | IEEE80211_C_SHSLOT /* short slot time supported */ 491 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ 492 ; 493 /* 494 * Query the hal to figure out h/w crypto support. 495 */ 496 if (ath_hal_ciphersupported(ah, HAL_CIPHER_WEP)) 497 ic->ic_caps |= IEEE80211_C_WEP; 498 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_OCB)) 499 ic->ic_caps |= IEEE80211_C_AES; 500 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_CCM)) 501 ic->ic_caps |= IEEE80211_C_AES_CCM; 502 if (ath_hal_ciphersupported(ah, HAL_CIPHER_CKIP)) 503 ic->ic_caps |= IEEE80211_C_CKIP; 504 if (ath_hal_ciphersupported(ah, HAL_CIPHER_TKIP)) { 505 ic->ic_caps |= IEEE80211_C_TKIP; 506 /* 507 * Check if h/w does the MIC and/or whether the 508 * separate key cache entries are required to 509 * handle both tx+rx MIC keys. 510 */ 511 if (ath_hal_ciphersupported(ah, HAL_CIPHER_MIC)) 512 ic->ic_caps |= IEEE80211_C_TKIPMIC; 513 if (ath_hal_tkipsplit(ah)) 514 sc->sc_splitmic = 1; 515 } 516 /* 517 * TPC support can be done either with a global cap or 518 * per-packet support. The latter is not available on 519 * all parts. We're a bit pedantic here as all parts 520 * support a global cap. 521 */ 522 sc->sc_hastpc = ath_hal_hastpc(ah); 523 if (sc->sc_hastpc || ath_hal_hastxpowlimit(ah)) 524 ic->ic_caps |= IEEE80211_C_TXPMGT; 525 526 /* 527 * Mark WME capability only if we have sufficient 528 * hardware queues to do proper priority scheduling. 529 */ 530 if (sc->sc_ac2q[WME_AC_BE] != sc->sc_ac2q[WME_AC_BK]) 531 ic->ic_caps |= IEEE80211_C_WME; 532 /* 533 * Check for frame bursting capability. 534 */ 535 if (ath_hal_hasbursting(ah)) 536 ic->ic_caps |= IEEE80211_C_BURST; 537 538 /* 539 * Indicate we need the 802.11 header padded to a 540 * 32-bit boundary for 4-address and QoS frames. 541 */ 542 ic->ic_flags |= IEEE80211_F_DATAPAD; 543 544 /* 545 * Query the hal about antenna support. 546 */ 547 if (ath_hal_hasdiversity(ah)) { 548 sc->sc_hasdiversity = 1; 549 sc->sc_diversity = ath_hal_getdiversity(ah); 550 } 551 sc->sc_defant = ath_hal_getdefantenna(ah); 552 553 /* 554 * Not all chips have the VEOL support we want to 555 * use with IBSS beacons; check here for it. 556 */ 557 sc->sc_hasveol = ath_hal_hasveol(ah); 558 559 /* get mac address from hardware */ 560 ath_hal_getmac(ah, ic->ic_myaddr); 561 562 /* call MI attach routine. */ 563 ieee80211_ifattach(ic); 564 /* override default methods */ 565 ic->ic_node_alloc = ath_node_alloc; 566 sc->sc_node_free = ic->ic_node_free; 567 ic->ic_node_free = ath_node_free; 568 ic->ic_node_getrssi = ath_node_getrssi; 569 sc->sc_recv_mgmt = ic->ic_recv_mgmt; 570 ic->ic_recv_mgmt = ath_recv_mgmt; 571 sc->sc_newstate = ic->ic_newstate; 572 ic->ic_newstate = ath_newstate; 573 ic->ic_crypto.cs_key_alloc = ath_key_alloc; 574 ic->ic_crypto.cs_key_delete = ath_key_delete; 575 ic->ic_crypto.cs_key_set = ath_key_set; 576 ic->ic_crypto.cs_key_update_begin = ath_key_update_begin; 577 ic->ic_crypto.cs_key_update_end = ath_key_update_end; 578 /* complete initialization */ 579 ieee80211_media_init(ic, ath_media_change, ieee80211_media_status); 580 581 ath_bpfattach(sc); 582 583 if (bootverbose) 584 ieee80211_announce(ic); 585 ath_announce(sc); 586 return 0; 587 bad2: 588 ath_tx_cleanup(sc); 589 ath_desc_free(sc); 590 bad: 591 if (ah) 592 ath_hal_detach(ah); 593 sc->sc_invalid = 1; 594 return error; 595 } 596 597 int 598 ath_detach(struct ath_softc *sc) 599 { 600 struct ifnet *ifp = &sc->sc_if; 601 602 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 603 __func__, ifp->if_flags); 604 605 ath_stop(ifp); 606 bpfdetach(ifp); 607 /* 608 * NB: the order of these is important: 609 * o call the 802.11 layer before detaching the hal to 610 * insure callbacks into the driver to delete global 611 * key cache entries can be handled 612 * o reclaim the tx queue data structures after calling 613 * the 802.11 layer as we'll get called back to reclaim 614 * node state and potentially want to use them 615 * o to cleanup the tx queues the hal is called, so detach 616 * it last 617 * Other than that, it's straightforward... 618 */ 619 ieee80211_ifdetach(&sc->sc_ic); 620 ath_rate_detach(sc->sc_rc); 621 ath_desc_free(sc); 622 ath_tx_cleanup(sc); 623 ath_hal_detach(sc->sc_ah); 624 625 return 0; 626 } 627 628 void 629 ath_suspend(struct ath_softc *sc) 630 { 631 struct ifnet *ifp = &sc->sc_if; 632 633 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 634 __func__, ifp->if_flags); 635 636 ath_stop(ifp); 637 } 638 639 void 640 ath_resume(struct ath_softc *sc) 641 { 642 struct ifnet *ifp = &sc->sc_if; 643 644 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 645 __func__, ifp->if_flags); 646 647 if (ifp->if_flags & IFF_UP) { 648 ath_init(ifp); 649 if (ifp->if_flags & IFF_RUNNING) 650 ath_start(ifp); 651 } 652 } 653 654 void 655 ath_shutdown(struct ath_softc *sc) 656 { 657 struct ifnet *ifp = &sc->sc_if; 658 659 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 660 __func__, ifp->if_flags); 661 662 ath_stop(ifp); 663 } 664 665 /* 666 * Interrupt handler. Most of the actual processing is deferred. 667 */ 668 void 669 ath_intr(void *arg) 670 { 671 struct ath_softc *sc = arg; 672 struct ifnet *ifp = &sc->sc_if; 673 struct ath_hal *ah = sc->sc_ah; 674 HAL_INT status; 675 676 if (sc->sc_invalid) { 677 /* 678 * The hardware is not ready/present, don't touch anything. 679 * Note this can happen early on if the IRQ is shared. 680 */ 681 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid; ignored\n", __func__); 682 return; 683 } 684 if (!ath_hal_intrpend(ah)) /* shared irq, not for us */ 685 return; 686 if ((ifp->if_flags & (IFF_RUNNING|IFF_UP)) != (IFF_RUNNING|IFF_UP)) { 687 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 688 __func__, ifp->if_flags); 689 ath_hal_getisr(ah, &status); /* clear ISR */ 690 ath_hal_intrset(ah, 0); /* disable further intr's */ 691 return; 692 } 693 /* 694 * Figure out the reason(s) for the interrupt. Note 695 * that the hal returns a pseudo-ISR that may include 696 * bits we haven't explicitly enabled so we mask the 697 * value to insure we only process bits we requested. 698 */ 699 ath_hal_getisr(ah, &status); /* NB: clears ISR too */ 700 DPRINTF(sc, ATH_DEBUG_INTR, "%s: status 0x%x\n", __func__, status); 701 status &= sc->sc_imask; /* discard unasked for bits */ 702 if (status & HAL_INT_FATAL) { 703 /* 704 * Fatal errors are unrecoverable. Typically 705 * these are caused by DMA errors. Unfortunately 706 * the exact reason is not (presently) returned 707 * by the hal. 708 */ 709 sc->sc_stats.ast_hardware++; 710 ath_hal_intrset(ah, 0); /* disable intr's until reset */ 711 taskqueue_enqueue(taskqueue_swi, &sc->sc_fataltask); 712 } else if (status & HAL_INT_RXORN) { 713 sc->sc_stats.ast_rxorn++; 714 ath_hal_intrset(ah, 0); /* disable intr's until reset */ 715 taskqueue_enqueue(taskqueue_swi, &sc->sc_rxorntask); 716 } else { 717 if (status & HAL_INT_SWBA) { 718 /* 719 * Software beacon alert--time to send a beacon. 720 * Handle beacon transmission directly; deferring 721 * this is too slow to meet timing constraints 722 * under load. 723 */ 724 ath_beacon_proc(sc, 0); 725 } 726 if (status & HAL_INT_RXEOL) { 727 /* 728 * NB: the hardware should re-read the link when 729 * RXE bit is written, but it doesn't work at 730 * least on older hardware revs. 731 */ 732 sc->sc_stats.ast_rxeol++; 733 sc->sc_rxlink = NULL; 734 } 735 if (status & HAL_INT_TXURN) { 736 sc->sc_stats.ast_txurn++; 737 /* bump tx trigger level */ 738 ath_hal_updatetxtriglevel(ah, AH_TRUE); 739 } 740 if (status & HAL_INT_RX) 741 taskqueue_enqueue(taskqueue_swi, &sc->sc_rxtask); 742 if (status & HAL_INT_TX) 743 taskqueue_enqueue(taskqueue_swi, &sc->sc_txtask); 744 if (status & HAL_INT_BMISS) { 745 sc->sc_stats.ast_bmiss++; 746 taskqueue_enqueue(taskqueue_swi, &sc->sc_bmisstask); 747 } 748 if (status & HAL_INT_MIB) { 749 sc->sc_stats.ast_mib++; 750 /* 751 * Disable interrupts until we service the MIB 752 * interrupt; otherwise it will continue to fire. 753 */ 754 ath_hal_intrset(ah, 0); 755 /* 756 * Let the hal handle the event. We assume it will 757 * clear whatever condition caused the interrupt. 758 */ 759 ath_hal_mibevent(ah, 760 &ATH_NODE(sc->sc_ic.ic_bss)->an_halstats); 761 ath_hal_intrset(ah, sc->sc_imask); 762 } 763 } 764 } 765 766 static void 767 ath_fatal_proc(void *arg, int pending) 768 { 769 struct ath_softc *sc = arg; 770 struct ifnet *ifp = &sc->sc_if; 771 772 if_printf(ifp, "hardware error; resetting\n"); 773 ath_reset(ifp); 774 } 775 776 static void 777 ath_rxorn_proc(void *arg, int pending) 778 { 779 struct ath_softc *sc = arg; 780 struct ifnet *ifp = &sc->sc_if; 781 782 if_printf(ifp, "rx FIFO overrun; resetting\n"); 783 ath_reset(ifp); 784 } 785 786 static void 787 ath_bmiss_proc(void *arg, int pending) 788 { 789 struct ath_softc *sc = arg; 790 struct ieee80211com *ic = &sc->sc_ic; 791 792 DPRINTF(sc, ATH_DEBUG_ANY, "%s: pending %u\n", __func__, pending); 793 KASSERT(ic->ic_opmode == IEEE80211_M_STA, 794 ("unexpect operating mode %u", ic->ic_opmode)); 795 if (ic->ic_state == IEEE80211_S_RUN) { 796 /* 797 * Rather than go directly to scan state, try to 798 * reassociate first. If that fails then the state 799 * machine will drop us into scanning after timing 800 * out waiting for a probe response. 801 */ 802 NET_LOCK_GIANT(); 803 ieee80211_new_state(ic, IEEE80211_S_ASSOC, -1); 804 NET_UNLOCK_GIANT(); 805 } 806 } 807 808 static u_int 809 ath_chan2flags(struct ieee80211com *ic, struct ieee80211_channel *chan) 810 { 811 #define N(a) (sizeof(a) / sizeof(a[0])) 812 static const u_int modeflags[] = { 813 0, /* IEEE80211_MODE_AUTO */ 814 CHANNEL_A, /* IEEE80211_MODE_11A */ 815 CHANNEL_B, /* IEEE80211_MODE_11B */ 816 CHANNEL_PUREG, /* IEEE80211_MODE_11G */ 817 0, /* IEEE80211_MODE_FH */ 818 CHANNEL_T, /* IEEE80211_MODE_TURBO_A */ 819 CHANNEL_108G /* IEEE80211_MODE_TURBO_G */ 820 }; 821 enum ieee80211_phymode mode = ieee80211_chan2mode(ic, chan); 822 823 KASSERT(mode < N(modeflags), ("unexpected phy mode %u", mode)); 824 KASSERT(modeflags[mode] != 0, ("mode %u undefined", mode)); 825 return modeflags[mode]; 826 #undef N 827 } 828 829 static void 830 ath_init(void *arg) 831 { 832 struct ath_softc *sc = (struct ath_softc *) arg; 833 struct ieee80211com *ic = &sc->sc_ic; 834 struct ifnet *ifp = &sc->sc_if; 835 struct ieee80211_node *ni; 836 struct ath_hal *ah = sc->sc_ah; 837 HAL_STATUS status; 838 839 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 840 __func__, ifp->if_flags); 841 842 ATH_LOCK(sc); 843 /* 844 * Stop anything previously setup. This is safe 845 * whether this is the first time through or not. 846 */ 847 ath_stop_locked(ifp); 848 849 /* 850 * The basic interface to setting the hardware in a good 851 * state is ``reset''. On return the hardware is known to 852 * be powered up and with interrupts disabled. This must 853 * be followed by initialization of the appropriate bits 854 * and then setup of the interrupt mask. 855 */ 856 sc->sc_curchan.channel = ic->ic_ibss_chan->ic_freq; 857 sc->sc_curchan.channelFlags = ath_chan2flags(ic, ic->ic_ibss_chan); 858 if (!ath_hal_reset(ah, ic->ic_opmode, &sc->sc_curchan, AH_FALSE, &status)) { 859 if_printf(ifp, "unable to reset hardware; hal status %u\n", 860 status); 861 goto done; 862 } 863 864 /* 865 * This is needed only to setup initial state 866 * but it's best done after a reset. 867 */ 868 ath_update_txpow(sc); 869 870 /* 871 * Setup the hardware after reset: the key cache 872 * is filled as needed and the receive engine is 873 * set going. Frame transmit is handled entirely 874 * in the frame output path; there's nothing to do 875 * here except setup the interrupt mask. 876 */ 877 ath_initkeytable(sc); /* XXX still needed? */ 878 if (ath_startrecv(sc) != 0) { 879 if_printf(ifp, "unable to start recv logic\n"); 880 goto done; 881 } 882 883 /* 884 * Enable interrupts. 885 */ 886 sc->sc_imask = HAL_INT_RX | HAL_INT_TX 887 | HAL_INT_RXEOL | HAL_INT_RXORN 888 | HAL_INT_FATAL | HAL_INT_GLOBAL; 889 /* 890 * Enable MIB interrupts when there are hardware phy counters. 891 * Note we only do this (at the moment) for station mode. 892 */ 893 if (sc->sc_needmib && ic->ic_opmode == IEEE80211_M_STA) 894 sc->sc_imask |= HAL_INT_MIB; 895 ath_hal_intrset(ah, sc->sc_imask); 896 897 ifp->if_flags |= IFF_RUNNING; 898 ic->ic_state = IEEE80211_S_INIT; 899 900 /* 901 * The hardware should be ready to go now so it's safe 902 * to kick the 802.11 state machine as it's likely to 903 * immediately call back to us to send mgmt frames. 904 */ 905 ni = ic->ic_bss; 906 ni->ni_chan = ic->ic_ibss_chan; 907 ath_chan_change(sc, ni->ni_chan); 908 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 909 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 910 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 911 } else 912 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 913 done: 914 ATH_UNLOCK(sc); 915 } 916 917 static void 918 ath_stop_locked(struct ifnet *ifp) 919 { 920 struct ath_softc *sc = ifp->if_softc; 921 struct ieee80211com *ic = &sc->sc_ic; 922 struct ath_hal *ah = sc->sc_ah; 923 924 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid %u if_flags 0x%x\n", 925 __func__, sc->sc_invalid, ifp->if_flags); 926 927 ATH_LOCK_ASSERT(sc); 928 if (ifp->if_flags & IFF_RUNNING) { 929 /* 930 * Shutdown the hardware and driver: 931 * reset 802.11 state machine 932 * turn off timers 933 * disable interrupts 934 * turn off the radio 935 * clear transmit machinery 936 * clear receive machinery 937 * drain and release tx queues 938 * reclaim beacon resources 939 * power down hardware 940 * 941 * Note that some of this work is not possible if the 942 * hardware is gone (invalid). 943 */ 944 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 945 ifp->if_flags &= ~IFF_RUNNING; 946 ifp->if_timer = 0; 947 if (!sc->sc_invalid) { 948 if (sc->sc_softled) { 949 callout_stop(&sc->sc_ledtimer); 950 ath_hal_gpioset(ah, sc->sc_ledpin, 951 !sc->sc_ledon); 952 sc->sc_blinking = 0; 953 } 954 ath_hal_intrset(ah, 0); 955 } 956 ath_draintxq(sc); 957 if (!sc->sc_invalid) { 958 ath_stoprecv(sc); 959 ath_hal_phydisable(ah); 960 } else 961 sc->sc_rxlink = NULL; 962 IFQ_DRV_PURGE(&ifp->if_snd); 963 ath_beacon_free(sc); 964 } 965 } 966 967 static void 968 ath_stop(struct ifnet *ifp) 969 { 970 struct ath_softc *sc = ifp->if_softc; 971 972 ATH_LOCK(sc); 973 ath_stop_locked(ifp); 974 if (!sc->sc_invalid) { 975 /* 976 * Set the chip in full sleep mode. Note that we are 977 * careful to do this only when bringing the interface 978 * completely to a stop. When the chip is in this state 979 * it must be carefully woken up or references to 980 * registers in the PCI clock domain may freeze the bus 981 * (and system). This varies by chip and is mostly an 982 * issue with newer parts that go to sleep more quickly. 983 */ 984 ath_hal_setpower(sc->sc_ah, HAL_PM_FULL_SLEEP, 0); 985 } 986 ATH_UNLOCK(sc); 987 } 988 989 /* 990 * Reset the hardware w/o losing operational state. This is 991 * basically a more efficient way of doing ath_stop, ath_init, 992 * followed by state transitions to the current 802.11 993 * operational state. Used to recover from various errors and 994 * to reset or reload hardware state. 995 */ 996 static int 997 ath_reset(struct ifnet *ifp) 998 { 999 struct ath_softc *sc = ifp->if_softc; 1000 struct ieee80211com *ic = &sc->sc_ic; 1001 struct ath_hal *ah = sc->sc_ah; 1002 struct ieee80211_channel *c; 1003 HAL_STATUS status; 1004 1005 /* 1006 * Convert to a HAL channel description with the flags 1007 * constrained to reflect the current operating mode. 1008 */ 1009 c = ic->ic_ibss_chan; 1010 sc->sc_curchan.channel = c->ic_freq; 1011 sc->sc_curchan.channelFlags = ath_chan2flags(ic, c); 1012 1013 ath_hal_intrset(ah, 0); /* disable interrupts */ 1014 ath_draintxq(sc); /* stop xmit side */ 1015 ath_stoprecv(sc); /* stop recv side */ 1016 /* NB: indicate channel change so we do a full reset */ 1017 if (!ath_hal_reset(ah, ic->ic_opmode, &sc->sc_curchan, AH_TRUE, &status)) 1018 if_printf(ifp, "%s: unable to reset hardware; hal status %u\n", 1019 __func__, status); 1020 ath_update_txpow(sc); /* update tx power state */ 1021 if (ath_startrecv(sc) != 0) /* restart recv */ 1022 if_printf(ifp, "%s: unable to start recv logic\n", __func__); 1023 /* 1024 * We may be doing a reset in response to an ioctl 1025 * that changes the channel so update any state that 1026 * might change as a result. 1027 */ 1028 ath_chan_change(sc, c); 1029 if (ic->ic_state == IEEE80211_S_RUN) 1030 ath_beacon_config(sc); /* restart beacons */ 1031 ath_hal_intrset(ah, sc->sc_imask); 1032 1033 ath_start(ifp); /* restart xmit */ 1034 return 0; 1035 } 1036 1037 static void 1038 ath_start(struct ifnet *ifp) 1039 { 1040 struct ath_softc *sc = ifp->if_softc; 1041 struct ath_hal *ah = sc->sc_ah; 1042 struct ieee80211com *ic = &sc->sc_ic; 1043 struct ieee80211_node *ni; 1044 struct ath_buf *bf; 1045 struct mbuf *m; 1046 struct ieee80211_frame *wh; 1047 struct ether_header *eh; 1048 1049 if ((ifp->if_flags & IFF_RUNNING) == 0 || sc->sc_invalid) 1050 return; 1051 for (;;) { 1052 /* 1053 * Grab a TX buffer and associated resources. 1054 */ 1055 ATH_TXBUF_LOCK(sc); 1056 bf = STAILQ_FIRST(&sc->sc_txbuf); 1057 if (bf != NULL) 1058 STAILQ_REMOVE_HEAD(&sc->sc_txbuf, bf_list); 1059 ATH_TXBUF_UNLOCK(sc); 1060 if (bf == NULL) { 1061 DPRINTF(sc, ATH_DEBUG_ANY, "%s: out of xmit buffers\n", 1062 __func__); 1063 sc->sc_stats.ast_tx_qstop++; 1064 ifp->if_flags |= IFF_OACTIVE; 1065 break; 1066 } 1067 /* 1068 * Poll the management queue for frames; they 1069 * have priority over normal data frames. 1070 */ 1071 IF_DEQUEUE(&ic->ic_mgtq, m); 1072 if (m == NULL) { 1073 /* 1074 * No data frames go out unless we're associated. 1075 */ 1076 if (ic->ic_state != IEEE80211_S_RUN) { 1077 DPRINTF(sc, ATH_DEBUG_ANY, 1078 "%s: ignore data packet, state %u\n", 1079 __func__, ic->ic_state); 1080 sc->sc_stats.ast_tx_discard++; 1081 ATH_TXBUF_LOCK(sc); 1082 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1083 ATH_TXBUF_UNLOCK(sc); 1084 break; 1085 } 1086 IFQ_DRV_DEQUEUE(&ifp->if_snd, m); /* XXX: LOCK */ 1087 if (m == NULL) { 1088 ATH_TXBUF_LOCK(sc); 1089 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1090 ATH_TXBUF_UNLOCK(sc); 1091 break; 1092 } 1093 /* 1094 * Find the node for the destination so we can do 1095 * things like power save and fast frames aggregation. 1096 */ 1097 if (m->m_len < sizeof(struct ether_header) && 1098 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 1099 ic->ic_stats.is_tx_nobuf++; /* XXX */ 1100 ni = NULL; 1101 goto bad; 1102 } 1103 eh = mtod(m, struct ether_header *); 1104 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 1105 if (ni == NULL) { 1106 /* NB: ieee80211_find_txnode does stat+msg */ 1107 m_freem(m); 1108 goto bad; 1109 } 1110 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1111 (m->m_flags & M_PWR_SAV) == 0) { 1112 /* 1113 * Station in power save mode; pass the frame 1114 * to the 802.11 layer and continue. We'll get 1115 * the frame back when the time is right. 1116 */ 1117 ieee80211_pwrsave(ic, ni, m); 1118 goto reclaim; 1119 } 1120 /* calculate priority so we can find the tx queue */ 1121 if (ieee80211_classify(ic, m, ni)) { 1122 DPRINTF(sc, ATH_DEBUG_XMIT, 1123 "%s: discard, classification failure\n", 1124 __func__); 1125 m_freem(m); 1126 goto bad; 1127 } 1128 ifp->if_opackets++; 1129 BPF_MTAP(ifp, m); 1130 /* 1131 * Encapsulate the packet in prep for transmission. 1132 */ 1133 m = ieee80211_encap(ic, m, ni); 1134 if (m == NULL) { 1135 DPRINTF(sc, ATH_DEBUG_ANY, 1136 "%s: encapsulation failure\n", 1137 __func__); 1138 sc->sc_stats.ast_tx_encap++; 1139 goto bad; 1140 } 1141 } else { 1142 /* 1143 * Hack! The referenced node pointer is in the 1144 * rcvif field of the packet header. This is 1145 * placed there by ieee80211_mgmt_output because 1146 * we need to hold the reference with the frame 1147 * and there's no other way (other than packet 1148 * tags which we consider too expensive to use) 1149 * to pass it along. 1150 */ 1151 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 1152 m->m_pkthdr.rcvif = NULL; 1153 1154 wh = mtod(m, struct ieee80211_frame *); 1155 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1156 IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1157 /* fill time stamp */ 1158 u_int64_t tsf; 1159 u_int32_t *tstamp; 1160 1161 tsf = ath_hal_gettsf64(ah); 1162 /* XXX: adjust 100us delay to xmit */ 1163 tsf += 100; 1164 tstamp = (u_int32_t *)&wh[1]; 1165 tstamp[0] = htole32(tsf & 0xffffffff); 1166 tstamp[1] = htole32(tsf >> 32); 1167 } 1168 sc->sc_stats.ast_tx_mgmt++; 1169 } 1170 1171 if (ath_tx_start(sc, ni, bf, m)) { 1172 bad: 1173 ifp->if_oerrors++; 1174 reclaim: 1175 ATH_TXBUF_LOCK(sc); 1176 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1177 ATH_TXBUF_UNLOCK(sc); 1178 if (ni != NULL) 1179 ieee80211_free_node(ni); 1180 continue; 1181 } 1182 1183 sc->sc_tx_timer = 5; 1184 ifp->if_timer = 1; 1185 } 1186 } 1187 1188 static int 1189 ath_media_change(struct ifnet *ifp) 1190 { 1191 #define IS_UP(ifp) \ 1192 ((ifp->if_flags & (IFF_RUNNING|IFF_UP)) == (IFF_RUNNING|IFF_UP)) 1193 int error; 1194 1195 error = ieee80211_media_change(ifp); 1196 if (error == ENETRESET) { 1197 if (IS_UP(ifp)) 1198 ath_init(ifp); /* XXX lose error */ 1199 error = 0; 1200 } 1201 return error; 1202 #undef IS_UP 1203 } 1204 1205 #ifdef AR_DEBUG 1206 static void 1207 ath_keyprint(const char *tag, u_int ix, 1208 const HAL_KEYVAL *hk, const u_int8_t mac[IEEE80211_ADDR_LEN]) 1209 { 1210 static const char *ciphers[] = { 1211 "WEP", 1212 "AES-OCB", 1213 "AES-CCM", 1214 "CKIP", 1215 "TKIP", 1216 "CLR", 1217 }; 1218 int i, n; 1219 1220 printf("%s: [%02u] %-7s ", tag, ix, ciphers[hk->kv_type]); 1221 for (i = 0, n = hk->kv_len; i < n; i++) 1222 printf("%02x", hk->kv_val[i]); 1223 printf(" mac %s", ether_sprintf(mac)); 1224 if (hk->kv_type == HAL_CIPHER_TKIP) { 1225 printf(" mic "); 1226 for (i = 0; i < sizeof(hk->kv_mic); i++) 1227 printf("%02x", hk->kv_mic[i]); 1228 } 1229 printf("\n"); 1230 } 1231 #endif 1232 1233 /* 1234 * Set a TKIP key into the hardware. This handles the 1235 * potential distribution of key state to multiple key 1236 * cache slots for TKIP. 1237 */ 1238 static int 1239 ath_keyset_tkip(struct ath_softc *sc, const struct ieee80211_key *k, 1240 HAL_KEYVAL *hk, const u_int8_t mac[IEEE80211_ADDR_LEN]) 1241 { 1242 #define IEEE80211_KEY_XR (IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV) 1243 static const u_int8_t zerobssid[IEEE80211_ADDR_LEN]; 1244 struct ath_hal *ah = sc->sc_ah; 1245 1246 KASSERT(k->wk_cipher->ic_cipher == IEEE80211_CIPHER_TKIP, 1247 ("got a non-TKIP key, cipher %u", k->wk_cipher->ic_cipher)); 1248 KASSERT(sc->sc_splitmic, ("key cache !split")); 1249 if ((k->wk_flags & IEEE80211_KEY_XR) == IEEE80211_KEY_XR) { 1250 /* 1251 * TX key goes at first index, RX key at +32. 1252 * The hal handles the MIC keys at index+64. 1253 */ 1254 memcpy(hk->kv_mic, k->wk_txmic, sizeof(hk->kv_mic)); 1255 KEYPRINTF(sc, k->wk_keyix, hk, zerobssid); 1256 if (!ath_hal_keyset(ah, k->wk_keyix, hk, zerobssid)) 1257 return 0; 1258 1259 memcpy(hk->kv_mic, k->wk_rxmic, sizeof(hk->kv_mic)); 1260 KEYPRINTF(sc, k->wk_keyix+32, hk, mac); 1261 /* XXX delete tx key on failure? */ 1262 return ath_hal_keyset(ah, k->wk_keyix+32, hk, mac); 1263 } else if (k->wk_flags & IEEE80211_KEY_XR) { 1264 /* 1265 * TX/RX key goes at first index. 1266 * The hal handles the MIC keys are index+64. 1267 */ 1268 KASSERT(k->wk_keyix < IEEE80211_WEP_NKID, 1269 ("group key at index %u", k->wk_keyix)); 1270 memcpy(hk->kv_mic, k->wk_flags & IEEE80211_KEY_XMIT ? 1271 k->wk_txmic : k->wk_rxmic, sizeof(hk->kv_mic)); 1272 KEYPRINTF(sc, k->wk_keyix, hk, zerobssid); 1273 return ath_hal_keyset(ah, k->wk_keyix, hk, zerobssid); 1274 } 1275 /* XXX key w/o xmit/recv; need this for compression? */ 1276 return 0; 1277 #undef IEEE80211_KEY_XR 1278 } 1279 1280 /* 1281 * Set a net80211 key into the hardware. This handles the 1282 * potential distribution of key state to multiple key 1283 * cache slots for TKIP with hardware MIC support. 1284 */ 1285 static int 1286 ath_keyset(struct ath_softc *sc, const struct ieee80211_key *k, 1287 const u_int8_t mac[IEEE80211_ADDR_LEN]) 1288 { 1289 #define N(a) (sizeof(a)/sizeof(a[0])) 1290 static const u_int8_t ciphermap[] = { 1291 HAL_CIPHER_WEP, /* IEEE80211_CIPHER_WEP */ 1292 HAL_CIPHER_TKIP, /* IEEE80211_CIPHER_TKIP */ 1293 HAL_CIPHER_AES_OCB, /* IEEE80211_CIPHER_AES_OCB */ 1294 HAL_CIPHER_AES_CCM, /* IEEE80211_CIPHER_AES_CCM */ 1295 (u_int8_t) -1, /* 4 is not allocated */ 1296 HAL_CIPHER_CKIP, /* IEEE80211_CIPHER_CKIP */ 1297 HAL_CIPHER_CLR, /* IEEE80211_CIPHER_NONE */ 1298 }; 1299 struct ath_hal *ah = sc->sc_ah; 1300 const struct ieee80211_cipher *cip = k->wk_cipher; 1301 HAL_KEYVAL hk; 1302 1303 memset(&hk, 0, sizeof(hk)); 1304 /* 1305 * Software crypto uses a "clear key" so non-crypto 1306 * state kept in the key cache are maintained and 1307 * so that rx frames have an entry to match. 1308 */ 1309 if ((k->wk_flags & IEEE80211_KEY_SWCRYPT) == 0) { 1310 KASSERT(cip->ic_cipher < N(ciphermap), 1311 ("invalid cipher type %u", cip->ic_cipher)); 1312 hk.kv_type = ciphermap[cip->ic_cipher]; 1313 hk.kv_len = k->wk_keylen; 1314 memcpy(hk.kv_val, k->wk_key, k->wk_keylen); 1315 } else 1316 hk.kv_type = HAL_CIPHER_CLR; 1317 1318 if (hk.kv_type == HAL_CIPHER_TKIP && 1319 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && 1320 sc->sc_splitmic) { 1321 return ath_keyset_tkip(sc, k, &hk, mac); 1322 } else { 1323 KEYPRINTF(sc, k->wk_keyix, &hk, mac); 1324 return ath_hal_keyset(ah, k->wk_keyix, &hk, mac); 1325 } 1326 #undef N 1327 } 1328 1329 /* 1330 * Fill the hardware key cache with key entries. 1331 */ 1332 static void 1333 ath_initkeytable(struct ath_softc *sc) 1334 { 1335 struct ieee80211com *ic = &sc->sc_ic; 1336 struct ifnet *ifp = &sc->sc_if; 1337 struct ath_hal *ah = sc->sc_ah; 1338 const u_int8_t *bssid; 1339 int i; 1340 1341 /* XXX maybe should reset all keys when !PRIVACY */ 1342 if (ic->ic_state == IEEE80211_S_SCAN) 1343 bssid = ifp->if_broadcastaddr; 1344 else 1345 bssid = ic->ic_bss->ni_bssid; 1346 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 1347 struct ieee80211_key *k = &ic->ic_nw_keys[i]; 1348 1349 if (k->wk_keylen == 0) { 1350 ath_hal_keyreset(ah, i); 1351 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: reset key %u\n", 1352 __func__, i); 1353 } else { 1354 ath_keyset(sc, k, bssid); 1355 } 1356 } 1357 } 1358 1359 /* 1360 * Allocate tx/rx key slots for TKIP. We allocate two slots for 1361 * each key, one for decrypt/encrypt and the other for the MIC. 1362 */ 1363 static u_int16_t 1364 key_alloc_2pair(struct ath_softc *sc) 1365 { 1366 #define N(a) (sizeof(a)/sizeof(a[0])) 1367 u_int i, keyix; 1368 1369 KASSERT(sc->sc_splitmic, ("key cache !split")); 1370 /* XXX could optimize */ 1371 for (i = 0; i < N(sc->sc_keymap)/4; i++) { 1372 u_int8_t b = sc->sc_keymap[i]; 1373 if (b != 0xff) { 1374 /* 1375 * One or more slots in this byte are free. 1376 */ 1377 keyix = i*NBBY; 1378 while (b & 1) { 1379 again: 1380 keyix++; 1381 b >>= 1; 1382 } 1383 /* XXX IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV */ 1384 if (isset(sc->sc_keymap, keyix+32) || 1385 isset(sc->sc_keymap, keyix+64) || 1386 isset(sc->sc_keymap, keyix+32+64)) { 1387 /* full pair unavailable */ 1388 /* XXX statistic */ 1389 if (keyix == (i+1)*NBBY) { 1390 /* no slots were appropriate, advance */ 1391 continue; 1392 } 1393 goto again; 1394 } 1395 setbit(sc->sc_keymap, keyix); 1396 setbit(sc->sc_keymap, keyix+64); 1397 setbit(sc->sc_keymap, keyix+32); 1398 setbit(sc->sc_keymap, keyix+32+64); 1399 DPRINTF(sc, ATH_DEBUG_KEYCACHE, 1400 "%s: key pair %u,%u %u,%u\n", 1401 __func__, keyix, keyix+64, 1402 keyix+32, keyix+32+64); 1403 return keyix; 1404 } 1405 } 1406 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: out of pair space\n", __func__); 1407 return IEEE80211_KEYIX_NONE; 1408 #undef N 1409 } 1410 1411 /* 1412 * Allocate a single key cache slot. 1413 */ 1414 static u_int16_t 1415 key_alloc_single(struct ath_softc *sc) 1416 { 1417 #define N(a) (sizeof(a)/sizeof(a[0])) 1418 u_int i, keyix; 1419 1420 /* XXX try i,i+32,i+64,i+32+64 to minimize key pair conflicts */ 1421 for (i = 0; i < N(sc->sc_keymap); i++) { 1422 u_int8_t b = sc->sc_keymap[i]; 1423 if (b != 0xff) { 1424 /* 1425 * One or more slots are free. 1426 */ 1427 keyix = i*NBBY; 1428 while (b & 1) 1429 keyix++, b >>= 1; 1430 setbit(sc->sc_keymap, keyix); 1431 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: key %u\n", 1432 __func__, keyix); 1433 return keyix; 1434 } 1435 } 1436 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: out of space\n", __func__); 1437 return IEEE80211_KEYIX_NONE; 1438 #undef N 1439 } 1440 1441 /* 1442 * Allocate one or more key cache slots for a uniacst key. The 1443 * key itself is needed only to identify the cipher. For hardware 1444 * TKIP with split cipher+MIC keys we allocate two key cache slot 1445 * pairs so that we can setup separate TX and RX MIC keys. Note 1446 * that the MIC key for a TKIP key at slot i is assumed by the 1447 * hardware to be at slot i+64. This limits TKIP keys to the first 1448 * 64 entries. 1449 */ 1450 static int 1451 ath_key_alloc(struct ieee80211com *ic, const struct ieee80211_key *k) 1452 { 1453 struct ath_softc *sc = ic->ic_ifp->if_softc; 1454 1455 /* 1456 * Group key allocation must be handled specially for 1457 * parts that do not support multicast key cache search 1458 * functionality. For those parts the key id must match 1459 * the h/w key index so lookups find the right key. On 1460 * parts w/ the key search facility we install the sender's 1461 * mac address (with the high bit set) and let the hardware 1462 * find the key w/o using the key id. This is preferred as 1463 * it permits us to support multiple users for adhoc and/or 1464 * multi-station operation. 1465 */ 1466 if ((k->wk_flags & IEEE80211_KEY_GROUP) && !sc->sc_mcastkey) { 1467 u_int keyix; 1468 1469 if (!(&ic->ic_nw_keys[0] <= k && 1470 k < &ic->ic_nw_keys[IEEE80211_WEP_NKID])) { 1471 /* should not happen */ 1472 DPRINTF(sc, ATH_DEBUG_KEYCACHE, 1473 "%s: bogus group key\n", __func__); 1474 return IEEE80211_KEYIX_NONE; 1475 } 1476 keyix = k - ic->ic_nw_keys; 1477 /* 1478 * XXX we pre-allocate the global keys so 1479 * have no way to check if they've already been allocated. 1480 */ 1481 return keyix; 1482 } 1483 1484 /* 1485 * We allocate two pair for TKIP when using the h/w to do 1486 * the MIC. For everything else, including software crypto, 1487 * we allocate a single entry. Note that s/w crypto requires 1488 * a pass-through slot on the 5211 and 5212. The 5210 does 1489 * not support pass-through cache entries and we map all 1490 * those requests to slot 0. 1491 */ 1492 if (k->wk_flags & IEEE80211_KEY_SWCRYPT) { 1493 return key_alloc_single(sc); 1494 } else if (k->wk_cipher->ic_cipher == IEEE80211_CIPHER_TKIP && 1495 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && sc->sc_splitmic) { 1496 return key_alloc_2pair(sc); 1497 } else { 1498 return key_alloc_single(sc); 1499 } 1500 } 1501 1502 /* 1503 * Delete an entry in the key cache allocated by ath_key_alloc. 1504 */ 1505 static int 1506 ath_key_delete(struct ieee80211com *ic, const struct ieee80211_key *k) 1507 { 1508 struct ath_softc *sc = ic->ic_ifp->if_softc; 1509 struct ath_hal *ah = sc->sc_ah; 1510 const struct ieee80211_cipher *cip = k->wk_cipher; 1511 u_int keyix = k->wk_keyix; 1512 1513 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: delete key %u\n", __func__, keyix); 1514 1515 ath_hal_keyreset(ah, keyix); 1516 /* 1517 * Handle split tx/rx keying required for TKIP with h/w MIC. 1518 */ 1519 if (cip->ic_cipher == IEEE80211_CIPHER_TKIP && 1520 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && sc->sc_splitmic) 1521 ath_hal_keyreset(ah, keyix+32); /* RX key */ 1522 if (keyix >= IEEE80211_WEP_NKID) { 1523 /* 1524 * Don't touch keymap entries for global keys so 1525 * they are never considered for dynamic allocation. 1526 */ 1527 clrbit(sc->sc_keymap, keyix); 1528 if (cip->ic_cipher == IEEE80211_CIPHER_TKIP && 1529 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && 1530 sc->sc_splitmic) { 1531 clrbit(sc->sc_keymap, keyix+64); /* TX key MIC */ 1532 clrbit(sc->sc_keymap, keyix+32); /* RX key */ 1533 clrbit(sc->sc_keymap, keyix+32+64); /* RX key MIC */ 1534 } 1535 } 1536 return 1; 1537 } 1538 1539 /* 1540 * Set the key cache contents for the specified key. Key cache 1541 * slot(s) must already have been allocated by ath_key_alloc. 1542 */ 1543 static int 1544 ath_key_set(struct ieee80211com *ic, const struct ieee80211_key *k, 1545 const u_int8_t mac[IEEE80211_ADDR_LEN]) 1546 { 1547 struct ath_softc *sc = ic->ic_ifp->if_softc; 1548 1549 return ath_keyset(sc, k, mac); 1550 } 1551 1552 /* 1553 * Block/unblock tx+rx processing while a key change is done. 1554 * We assume the caller serializes key management operations 1555 * so we only need to worry about synchronization with other 1556 * uses that originate in the driver. 1557 */ 1558 static void 1559 ath_key_update_begin(struct ieee80211com *ic) 1560 { 1561 struct ifnet *ifp = ic->ic_ifp; 1562 struct ath_softc *sc = ifp->if_softc; 1563 1564 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 1565 #if 0 1566 tasklet_disable(&sc->sc_rxtq); 1567 #endif 1568 IF_LOCK(&ifp->if_snd); /* NB: doesn't block mgmt frames */ 1569 } 1570 1571 static void 1572 ath_key_update_end(struct ieee80211com *ic) 1573 { 1574 struct ifnet *ifp = ic->ic_ifp; 1575 struct ath_softc *sc = ifp->if_softc; 1576 1577 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 1578 IF_UNLOCK(&ifp->if_snd); 1579 #if 0 1580 tasklet_enable(&sc->sc_rxtq); 1581 #endif 1582 } 1583 1584 /* 1585 * Calculate the receive filter according to the 1586 * operating mode and state: 1587 * 1588 * o always accept unicast, broadcast, and multicast traffic 1589 * o maintain current state of phy error reception (the hal 1590 * may enable phy error frames for noise immunity work) 1591 * o probe request frames are accepted only when operating in 1592 * hostap, adhoc, or monitor modes 1593 * o enable promiscuous mode according to the interface state 1594 * o accept beacons: 1595 * - when operating in adhoc mode so the 802.11 layer creates 1596 * node table entries for peers, 1597 * - when operating in station mode for collecting rssi data when 1598 * the station is otherwise quiet, or 1599 * - when scanning 1600 */ 1601 static u_int32_t 1602 ath_calcrxfilter(struct ath_softc *sc, enum ieee80211_state state) 1603 { 1604 struct ieee80211com *ic = &sc->sc_ic; 1605 struct ath_hal *ah = sc->sc_ah; 1606 struct ifnet *ifp = &sc->sc_if; 1607 u_int32_t rfilt; 1608 1609 rfilt = (ath_hal_getrxfilter(ah) & HAL_RX_FILTER_PHYERR) 1610 | HAL_RX_FILTER_UCAST | HAL_RX_FILTER_BCAST | HAL_RX_FILTER_MCAST; 1611 if (ic->ic_opmode != IEEE80211_M_STA) 1612 rfilt |= HAL_RX_FILTER_PROBEREQ; 1613 if (ic->ic_opmode != IEEE80211_M_HOSTAP && 1614 (ifp->if_flags & IFF_PROMISC)) 1615 rfilt |= HAL_RX_FILTER_PROM; 1616 if (ic->ic_opmode == IEEE80211_M_STA || 1617 ic->ic_opmode == IEEE80211_M_IBSS || 1618 state == IEEE80211_S_SCAN) 1619 rfilt |= HAL_RX_FILTER_BEACON; 1620 return rfilt; 1621 } 1622 1623 static void 1624 ath_mode_init(struct ath_softc *sc) 1625 { 1626 struct ieee80211com *ic = &sc->sc_ic; 1627 struct ath_hal *ah = sc->sc_ah; 1628 struct ifnet *ifp = &sc->sc_if; 1629 u_int32_t rfilt, mfilt[2], val; 1630 u_int8_t pos; 1631 struct ifmultiaddr *ifma; 1632 1633 /* configure rx filter */ 1634 rfilt = ath_calcrxfilter(sc, ic->ic_state); 1635 ath_hal_setrxfilter(ah, rfilt); 1636 1637 /* configure operational mode */ 1638 ath_hal_setopmode(ah); 1639 1640 /* 1641 * Handle any link-level address change. Note that we only 1642 * need to force ic_myaddr; any other addresses are handled 1643 * as a byproduct of the ifnet code marking the interface 1644 * down then up. 1645 * 1646 * XXX should get from lladdr instead of arpcom but that's more work 1647 */ 1648 IEEE80211_ADDR_COPY(ic->ic_myaddr, IFP2AC(ifp)->ac_enaddr); 1649 ath_hal_setmac(ah, ic->ic_myaddr); 1650 1651 /* calculate and install multicast filter */ 1652 if ((ifp->if_flags & IFF_ALLMULTI) == 0) { 1653 mfilt[0] = mfilt[1] = 0; 1654 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1655 caddr_t dl; 1656 1657 /* calculate XOR of eight 6bit values */ 1658 dl = LLADDR((struct sockaddr_dl *) ifma->ifma_addr); 1659 val = LE_READ_4(dl + 0); 1660 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 1661 val = LE_READ_4(dl + 3); 1662 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 1663 pos &= 0x3f; 1664 mfilt[pos / 32] |= (1 << (pos % 32)); 1665 } 1666 } else { 1667 mfilt[0] = mfilt[1] = ~0; 1668 } 1669 ath_hal_setmcastfilter(ah, mfilt[0], mfilt[1]); 1670 DPRINTF(sc, ATH_DEBUG_MODE, "%s: RX filter 0x%x, MC filter %08x:%08x\n", 1671 __func__, rfilt, mfilt[0], mfilt[1]); 1672 } 1673 1674 /* 1675 * Set the slot time based on the current setting. 1676 */ 1677 static void 1678 ath_setslottime(struct ath_softc *sc) 1679 { 1680 struct ieee80211com *ic = &sc->sc_ic; 1681 struct ath_hal *ah = sc->sc_ah; 1682 1683 if (ic->ic_flags & IEEE80211_F_SHSLOT) 1684 ath_hal_setslottime(ah, HAL_SLOT_TIME_9); 1685 else 1686 ath_hal_setslottime(ah, HAL_SLOT_TIME_20); 1687 sc->sc_updateslot = OK; 1688 } 1689 1690 /* 1691 * Callback from the 802.11 layer to update the 1692 * slot time based on the current setting. 1693 */ 1694 static void 1695 ath_updateslot(struct ifnet *ifp) 1696 { 1697 struct ath_softc *sc = ifp->if_softc; 1698 struct ieee80211com *ic = &sc->sc_ic; 1699 1700 /* 1701 * When not coordinating the BSS, change the hardware 1702 * immediately. For other operation we defer the change 1703 * until beacon updates have propagated to the stations. 1704 */ 1705 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 1706 sc->sc_updateslot = UPDATE; 1707 else 1708 ath_setslottime(sc); 1709 } 1710 1711 /* 1712 * Setup a h/w transmit queue for beacons. 1713 */ 1714 static int 1715 ath_beaconq_setup(struct ath_hal *ah) 1716 { 1717 HAL_TXQ_INFO qi; 1718 1719 memset(&qi, 0, sizeof(qi)); 1720 qi.tqi_aifs = HAL_TXQ_USEDEFAULT; 1721 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; 1722 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; 1723 /* NB: don't enable any interrupts */ 1724 return ath_hal_setuptxqueue(ah, HAL_TX_QUEUE_BEACON, &qi); 1725 } 1726 1727 /* 1728 * Allocate and setup an initial beacon frame. 1729 */ 1730 static int 1731 ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_node *ni) 1732 { 1733 struct ieee80211com *ic = ni->ni_ic; 1734 struct ath_buf *bf; 1735 struct mbuf *m; 1736 int error; 1737 1738 bf = STAILQ_FIRST(&sc->sc_bbuf); 1739 if (bf == NULL) { 1740 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: no dma buffers\n", __func__); 1741 sc->sc_stats.ast_be_nombuf++; /* XXX */ 1742 return ENOMEM; /* XXX */ 1743 } 1744 /* 1745 * NB: the beacon data buffer must be 32-bit aligned; 1746 * we assume the mbuf routines will return us something 1747 * with this alignment (perhaps should assert). 1748 */ 1749 m = ieee80211_beacon_alloc(ic, ni, &sc->sc_boff); 1750 if (m == NULL) { 1751 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: cannot get mbuf\n", 1752 __func__); 1753 sc->sc_stats.ast_be_nombuf++; 1754 return ENOMEM; 1755 } 1756 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, 1757 bf->bf_segs, &bf->bf_nseg, 1758 BUS_DMA_NOWAIT); 1759 if (error == 0) { 1760 bf->bf_m = m; 1761 bf->bf_node = ieee80211_ref_node(ni); 1762 } else { 1763 m_freem(m); 1764 } 1765 return error; 1766 } 1767 1768 /* 1769 * Setup the beacon frame for transmit. 1770 */ 1771 static void 1772 ath_beacon_setup(struct ath_softc *sc, struct ath_buf *bf) 1773 { 1774 #define USE_SHPREAMBLE(_ic) \ 1775 (((_ic)->ic_flags & (IEEE80211_F_SHPREAMBLE | IEEE80211_F_USEBARKER))\ 1776 == IEEE80211_F_SHPREAMBLE) 1777 struct ieee80211_node *ni = bf->bf_node; 1778 struct ieee80211com *ic = ni->ni_ic; 1779 struct mbuf *m = bf->bf_m; 1780 struct ath_hal *ah = sc->sc_ah; 1781 struct ath_node *an = ATH_NODE(ni); 1782 struct ath_desc *ds; 1783 int flags, antenna; 1784 u_int8_t rate; 1785 1786 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: m %p len %u\n", 1787 __func__, m, m->m_len); 1788 1789 /* setup descriptors */ 1790 ds = bf->bf_desc; 1791 1792 flags = HAL_TXDESC_NOACK; 1793 if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) { 1794 ds->ds_link = bf->bf_daddr; /* self-linked */ 1795 flags |= HAL_TXDESC_VEOL; 1796 /* 1797 * Let hardware handle antenna switching. 1798 */ 1799 antenna = 0; 1800 } else { 1801 ds->ds_link = 0; 1802 /* 1803 * Switch antenna every 4 beacons. 1804 * XXX assumes two antenna 1805 */ 1806 antenna = (sc->sc_stats.ast_be_xmit & 4 ? 2 : 1); 1807 } 1808 1809 KASSERT(bf->bf_nseg == 1, 1810 ("multi-segment beacon frame; nseg %u", bf->bf_nseg)); 1811 ds->ds_data = bf->bf_segs[0].ds_addr; 1812 /* 1813 * Calculate rate code. 1814 * XXX everything at min xmit rate 1815 */ 1816 if (USE_SHPREAMBLE(ic)) 1817 rate = an->an_tx_mgtratesp; 1818 else 1819 rate = an->an_tx_mgtrate; 1820 ath_hal_setuptxdesc(ah, ds 1821 , m->m_len + IEEE80211_CRC_LEN /* frame length */ 1822 , sizeof(struct ieee80211_frame)/* header length */ 1823 , HAL_PKT_TYPE_BEACON /* Atheros packet type */ 1824 , ni->ni_txpower /* txpower XXX */ 1825 , rate, 1 /* series 0 rate/tries */ 1826 , HAL_TXKEYIX_INVALID /* no encryption */ 1827 , antenna /* antenna mode */ 1828 , flags /* no ack, veol for beacons */ 1829 , 0 /* rts/cts rate */ 1830 , 0 /* rts/cts duration */ 1831 ); 1832 /* NB: beacon's BufLen must be a multiple of 4 bytes */ 1833 ath_hal_filltxdesc(ah, ds 1834 , roundup(m->m_len, 4) /* buffer length */ 1835 , AH_TRUE /* first segment */ 1836 , AH_TRUE /* last segment */ 1837 , ds /* first descriptor */ 1838 ); 1839 #undef USE_SHPREAMBLE 1840 } 1841 1842 /* 1843 * Transmit a beacon frame at SWBA. Dynamic updates to the 1844 * frame contents are done as needed and the slot time is 1845 * also adjusted based on current state. 1846 */ 1847 static void 1848 ath_beacon_proc(void *arg, int pending) 1849 { 1850 struct ath_softc *sc = arg; 1851 struct ath_buf *bf = STAILQ_FIRST(&sc->sc_bbuf); 1852 struct ieee80211_node *ni = bf->bf_node; 1853 struct ieee80211com *ic = ni->ni_ic; 1854 struct ath_hal *ah = sc->sc_ah; 1855 struct mbuf *m; 1856 int ncabq, error, otherant; 1857 1858 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: pending %u\n", 1859 __func__, pending); 1860 1861 if (ic->ic_opmode == IEEE80211_M_STA || 1862 ic->ic_opmode == IEEE80211_M_MONITOR || 1863 bf == NULL || bf->bf_m == NULL) { 1864 DPRINTF(sc, ATH_DEBUG_ANY, "%s: ic_flags=%x bf=%p bf_m=%p\n", 1865 __func__, ic->ic_flags, bf, bf ? bf->bf_m : NULL); 1866 return; 1867 } 1868 /* 1869 * Check if the previous beacon has gone out. If 1870 * not don't don't try to post another, skip this 1871 * period and wait for the next. Missed beacons 1872 * indicate a problem and should not occur. If we 1873 * miss too many consecutive beacons reset the device. 1874 */ 1875 if (ath_hal_numtxpending(ah, sc->sc_bhalq) != 0) { 1876 sc->sc_bmisscount++; 1877 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, 1878 "%s: missed %u consecutive beacons\n", 1879 __func__, sc->sc_bmisscount); 1880 if (sc->sc_bmisscount > 3) /* NB: 3 is a guess */ 1881 taskqueue_enqueue(taskqueue_swi, &sc->sc_bstucktask); 1882 return; 1883 } 1884 if (sc->sc_bmisscount != 0) { 1885 DPRINTF(sc, ATH_DEBUG_BEACON, 1886 "%s: resume beacon xmit after %u misses\n", 1887 __func__, sc->sc_bmisscount); 1888 sc->sc_bmisscount = 0; 1889 } 1890 1891 /* 1892 * Update dynamic beacon contents. If this returns 1893 * non-zero then we need to remap the memory because 1894 * the beacon frame changed size (probably because 1895 * of the TIM bitmap). 1896 */ 1897 m = bf->bf_m; 1898 ncabq = ath_hal_numtxpending(ah, sc->sc_cabq->axq_qnum); 1899 if (ieee80211_beacon_update(ic, bf->bf_node, &sc->sc_boff, m, ncabq)) { 1900 /* XXX too conservative? */ 1901 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 1902 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m, 1903 bf->bf_segs, &bf->bf_nseg, 1904 BUS_DMA_NOWAIT); 1905 if (error != 0) { 1906 if_printf(ic->ic_ifp, 1907 "%s: bus_dmamap_load_mbuf_sg failed, error %u\n", 1908 __func__, error); 1909 return; 1910 } 1911 } 1912 1913 /* 1914 * Handle slot time change when a non-ERP station joins/leaves 1915 * an 11g network. The 802.11 layer notifies us via callback, 1916 * we mark updateslot, then wait one beacon before effecting 1917 * the change. This gives associated stations at least one 1918 * beacon interval to note the state change. 1919 */ 1920 /* XXX locking */ 1921 if (sc->sc_updateslot == UPDATE) 1922 sc->sc_updateslot = COMMIT; /* commit next beacon */ 1923 else if (sc->sc_updateslot == COMMIT) 1924 ath_setslottime(sc); /* commit change to h/w */ 1925 1926 /* 1927 * Check recent per-antenna transmit statistics and flip 1928 * the default antenna if noticeably more frames went out 1929 * on the non-default antenna. 1930 * XXX assumes 2 anntenae 1931 */ 1932 otherant = sc->sc_defant & 1 ? 2 : 1; 1933 if (sc->sc_ant_tx[otherant] > sc->sc_ant_tx[sc->sc_defant] + 2) 1934 ath_setdefantenna(sc, otherant); 1935 sc->sc_ant_tx[1] = sc->sc_ant_tx[2] = 0; 1936 1937 /* 1938 * Construct tx descriptor. 1939 */ 1940 ath_beacon_setup(sc, bf); 1941 1942 /* 1943 * Stop any current dma and put the new frame on the queue. 1944 * This should never fail since we check above that no frames 1945 * are still pending on the queue. 1946 */ 1947 if (!ath_hal_stoptxdma(ah, sc->sc_bhalq)) { 1948 DPRINTF(sc, ATH_DEBUG_ANY, 1949 "%s: beacon queue %u did not stop?\n", 1950 __func__, sc->sc_bhalq); 1951 } 1952 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 1953 1954 /* 1955 * Enable the CAB queue before the beacon queue to 1956 * insure cab frames are triggered by this beacon. 1957 */ 1958 if (sc->sc_boff.bo_tim[4] & 1) /* NB: only at DTIM */ 1959 ath_hal_txstart(ah, sc->sc_cabq->axq_qnum); 1960 ath_hal_puttxbuf(ah, sc->sc_bhalq, bf->bf_daddr); 1961 ath_hal_txstart(ah, sc->sc_bhalq); 1962 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, 1963 "%s: TXDP[%u] = %p (%p)\n", __func__, 1964 sc->sc_bhalq, (caddr_t)bf->bf_daddr, bf->bf_desc); 1965 1966 sc->sc_stats.ast_be_xmit++; 1967 } 1968 1969 /* 1970 * Reset the hardware after detecting beacons have stopped. 1971 */ 1972 static void 1973 ath_bstuck_proc(void *arg, int pending) 1974 { 1975 struct ath_softc *sc = arg; 1976 struct ifnet *ifp = &sc->sc_if; 1977 1978 if_printf(ifp, "stuck beacon; resetting (bmiss count %u)\n", 1979 sc->sc_bmisscount); 1980 ath_reset(ifp); 1981 } 1982 1983 /* 1984 * Reclaim beacon resources. 1985 */ 1986 static void 1987 ath_beacon_free(struct ath_softc *sc) 1988 { 1989 struct ath_buf *bf; 1990 1991 STAILQ_FOREACH(bf, &sc->sc_bbuf, bf_list) { 1992 if (bf->bf_m != NULL) { 1993 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 1994 m_freem(bf->bf_m); 1995 bf->bf_m = NULL; 1996 } 1997 if (bf->bf_node != NULL) { 1998 ieee80211_free_node(bf->bf_node); 1999 bf->bf_node = NULL; 2000 } 2001 } 2002 } 2003 2004 /* 2005 * Configure the beacon and sleep timers. 2006 * 2007 * When operating as an AP this resets the TSF and sets 2008 * up the hardware to notify us when we need to issue beacons. 2009 * 2010 * When operating in station mode this sets up the beacon 2011 * timers according to the timestamp of the last received 2012 * beacon and the current TSF, configures PCF and DTIM 2013 * handling, programs the sleep registers so the hardware 2014 * will wakeup in time to receive beacons, and configures 2015 * the beacon miss handling so we'll receive a BMISS 2016 * interrupt when we stop seeing beacons from the AP 2017 * we've associated with. 2018 */ 2019 static void 2020 ath_beacon_config(struct ath_softc *sc) 2021 { 2022 struct ath_hal *ah = sc->sc_ah; 2023 struct ieee80211com *ic = &sc->sc_ic; 2024 struct ieee80211_node *ni = ic->ic_bss; 2025 u_int32_t nexttbtt, intval; 2026 2027 nexttbtt = (LE_READ_4(ni->ni_tstamp.data + 4) << 22) | 2028 (LE_READ_4(ni->ni_tstamp.data) >> 10); 2029 intval = ni->ni_intval & HAL_BEACON_PERIOD; 2030 if (nexttbtt == 0) /* e.g. for ap mode */ 2031 nexttbtt = intval; 2032 else if (intval) /* NB: can be 0 for monitor mode */ 2033 nexttbtt = roundup(nexttbtt, intval); 2034 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: nexttbtt %u intval %u (%u)\n", 2035 __func__, nexttbtt, intval, ni->ni_intval); 2036 if (ic->ic_opmode == IEEE80211_M_STA) { 2037 HAL_BEACON_STATE bs; 2038 2039 /* NB: no PCF support right now */ 2040 memset(&bs, 0, sizeof(bs)); 2041 bs.bs_intval = intval; 2042 bs.bs_nexttbtt = nexttbtt; 2043 bs.bs_dtimperiod = bs.bs_intval; 2044 bs.bs_nextdtim = nexttbtt; 2045 /* 2046 * The 802.11 layer records the offset to the DTIM 2047 * bitmap while receiving beacons; use it here to 2048 * enable h/w detection of our AID being marked in 2049 * the bitmap vector (to indicate frames for us are 2050 * pending at the AP). 2051 */ 2052 bs.bs_timoffset = ni->ni_timoff; 2053 /* 2054 * Calculate the number of consecutive beacons to miss 2055 * before taking a BMISS interrupt. The configuration 2056 * is specified in ms, so we need to convert that to 2057 * TU's and then calculate based on the beacon interval. 2058 * Note that we clamp the result to at most 10 beacons. 2059 */ 2060 bs.bs_bmissthreshold = howmany(ic->ic_bmisstimeout, intval); 2061 if (bs.bs_bmissthreshold > 10) 2062 bs.bs_bmissthreshold = 10; 2063 else if (bs.bs_bmissthreshold <= 0) 2064 bs.bs_bmissthreshold = 1; 2065 2066 /* 2067 * Calculate sleep duration. The configuration is 2068 * given in ms. We insure a multiple of the beacon 2069 * period is used. Also, if the sleep duration is 2070 * greater than the DTIM period then it makes senses 2071 * to make it a multiple of that. 2072 * 2073 * XXX fixed at 100ms 2074 */ 2075 bs.bs_sleepduration = 2076 roundup(IEEE80211_MS_TO_TU(100), bs.bs_intval); 2077 if (bs.bs_sleepduration > bs.bs_dtimperiod) 2078 bs.bs_sleepduration = roundup(bs.bs_sleepduration, bs.bs_dtimperiod); 2079 2080 DPRINTF(sc, ATH_DEBUG_BEACON, 2081 "%s: intval %u nexttbtt %u dtim %u nextdtim %u bmiss %u sleep %u cfp:period %u maxdur %u next %u timoffset %u\n" 2082 , __func__ 2083 , bs.bs_intval 2084 , bs.bs_nexttbtt 2085 , bs.bs_dtimperiod 2086 , bs.bs_nextdtim 2087 , bs.bs_bmissthreshold 2088 , bs.bs_sleepduration 2089 , bs.bs_cfpperiod 2090 , bs.bs_cfpmaxduration 2091 , bs.bs_cfpnext 2092 , bs.bs_timoffset 2093 ); 2094 ath_hal_intrset(ah, 0); 2095 ath_hal_beacontimers(ah, &bs); 2096 sc->sc_imask |= HAL_INT_BMISS; 2097 ath_hal_intrset(ah, sc->sc_imask); 2098 } else { 2099 ath_hal_intrset(ah, 0); 2100 if (nexttbtt == intval) 2101 intval |= HAL_BEACON_RESET_TSF; 2102 if (ic->ic_opmode == IEEE80211_M_IBSS) { 2103 /* 2104 * In IBSS mode enable the beacon timers but only 2105 * enable SWBA interrupts if we need to manually 2106 * prepare beacon frames. Otherwise we use a 2107 * self-linked tx descriptor and let the hardware 2108 * deal with things. 2109 */ 2110 intval |= HAL_BEACON_ENA; 2111 if (!sc->sc_hasveol) 2112 sc->sc_imask |= HAL_INT_SWBA; 2113 } else if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 2114 /* 2115 * In AP mode we enable the beacon timers and 2116 * SWBA interrupts to prepare beacon frames. 2117 */ 2118 intval |= HAL_BEACON_ENA; 2119 sc->sc_imask |= HAL_INT_SWBA; /* beacon prepare */ 2120 } 2121 ath_hal_beaconinit(ah, nexttbtt, intval); 2122 sc->sc_bmisscount = 0; 2123 ath_hal_intrset(ah, sc->sc_imask); 2124 /* 2125 * When using a self-linked beacon descriptor in 2126 * ibss mode load it once here. 2127 */ 2128 if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) 2129 ath_beacon_proc(sc, 0); 2130 } 2131 } 2132 2133 static void 2134 ath_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 2135 { 2136 bus_addr_t *paddr = (bus_addr_t*) arg; 2137 KASSERT(error == 0, ("error %u on bus_dma callback", error)); 2138 *paddr = segs->ds_addr; 2139 } 2140 2141 static int 2142 ath_descdma_setup(struct ath_softc *sc, 2143 struct ath_descdma *dd, ath_bufhead *head, 2144 const char *name, int nbuf, int ndesc) 2145 { 2146 #define DS2PHYS(_dd, _ds) \ 2147 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc)) 2148 struct ifnet *ifp = &sc->sc_if; 2149 struct ath_desc *ds; 2150 struct ath_buf *bf; 2151 int i, bsize, error; 2152 2153 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA: %u buffers %u desc/buf\n", 2154 __func__, name, nbuf, ndesc); 2155 2156 dd->dd_name = name; 2157 dd->dd_desc_len = sizeof(struct ath_desc) * nbuf * ndesc; 2158 2159 /* 2160 * Setup DMA descriptor area. 2161 */ 2162 error = bus_dma_tag_create(NULL, /* parent */ 2163 PAGE_SIZE, 0, /* alignment, bounds */ 2164 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 2165 BUS_SPACE_MAXADDR, /* highaddr */ 2166 NULL, NULL, /* filter, filterarg */ 2167 dd->dd_desc_len, /* maxsize */ 2168 1, /* nsegments */ 2169 BUS_SPACE_MAXADDR, /* maxsegsize */ 2170 BUS_DMA_ALLOCNOW, /* flags */ 2171 NULL, /* lockfunc */ 2172 NULL, /* lockarg */ 2173 &dd->dd_dmat); 2174 if (error != 0) { 2175 if_printf(ifp, "cannot allocate %s DMA tag\n", dd->dd_name); 2176 return error; 2177 } 2178 2179 /* allocate descriptors */ 2180 error = bus_dmamap_create(dd->dd_dmat, BUS_DMA_NOWAIT, &dd->dd_dmamap); 2181 if (error != 0) { 2182 if_printf(ifp, "unable to create dmamap for %s descriptors, " 2183 "error %u\n", dd->dd_name, error); 2184 goto fail0; 2185 } 2186 2187 error = bus_dmamem_alloc(dd->dd_dmat, (void**) &dd->dd_desc, 2188 BUS_DMA_NOWAIT, &dd->dd_dmamap); 2189 if (error != 0) { 2190 if_printf(ifp, "unable to alloc memory for %u %s descriptors, " 2191 "error %u\n", nbuf * ndesc, dd->dd_name, error); 2192 goto fail1; 2193 } 2194 2195 error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap, 2196 dd->dd_desc, dd->dd_desc_len, 2197 ath_load_cb, &dd->dd_desc_paddr, 2198 BUS_DMA_NOWAIT); 2199 if (error != 0) { 2200 if_printf(ifp, "unable to map %s descriptors, error %u\n", 2201 dd->dd_name, error); 2202 goto fail2; 2203 } 2204 2205 ds = dd->dd_desc; 2206 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA map: %p (%lu) -> %p (%lu)\n", 2207 __func__, dd->dd_name, ds, (u_long) dd->dd_desc_len, 2208 (caddr_t) dd->dd_desc_paddr, /*XXX*/ (u_long) dd->dd_desc_len); 2209 2210 /* allocate rx buffers */ 2211 bsize = sizeof(struct ath_buf) * nbuf; 2212 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO); 2213 if (bf == NULL) { 2214 if_printf(ifp, "malloc of %s buffers failed, size %u\n", 2215 dd->dd_name, bsize); 2216 goto fail3; 2217 } 2218 dd->dd_bufptr = bf; 2219 2220 STAILQ_INIT(head); 2221 for (i = 0; i < nbuf; i++, bf++, ds += ndesc) { 2222 bf->bf_desc = ds; 2223 bf->bf_daddr = DS2PHYS(dd, ds); 2224 error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT, 2225 &bf->bf_dmamap); 2226 if (error != 0) { 2227 if_printf(ifp, "unable to create dmamap for %s " 2228 "buffer %u, error %u\n", dd->dd_name, i, error); 2229 ath_descdma_cleanup(sc, dd, head); 2230 return error; 2231 } 2232 STAILQ_INSERT_TAIL(head, bf, bf_list); 2233 } 2234 return 0; 2235 fail3: 2236 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 2237 fail2: 2238 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); 2239 fail1: 2240 bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap); 2241 fail0: 2242 bus_dma_tag_destroy(dd->dd_dmat); 2243 memset(dd, 0, sizeof(*dd)); 2244 return error; 2245 #undef DS2PHYS 2246 } 2247 2248 static void 2249 ath_descdma_cleanup(struct ath_softc *sc, 2250 struct ath_descdma *dd, ath_bufhead *head) 2251 { 2252 struct ath_buf *bf; 2253 struct ieee80211_node *ni; 2254 2255 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 2256 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap); 2257 bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap); 2258 bus_dma_tag_destroy(dd->dd_dmat); 2259 2260 STAILQ_FOREACH(bf, head, bf_list) { 2261 if (bf->bf_m) { 2262 m_freem(bf->bf_m); 2263 bf->bf_m = NULL; 2264 } 2265 if (bf->bf_dmamap != NULL) { 2266 bus_dmamap_destroy(sc->sc_dmat, bf->bf_dmamap); 2267 bf->bf_dmamap = NULL; 2268 } 2269 ni = bf->bf_node; 2270 bf->bf_node = NULL; 2271 if (ni != NULL) { 2272 /* 2273 * Reclaim node reference. 2274 */ 2275 ieee80211_free_node(ni); 2276 } 2277 } 2278 2279 STAILQ_INIT(head); 2280 free(dd->dd_bufptr, M_ATHDEV); 2281 memset(dd, 0, sizeof(*dd)); 2282 } 2283 2284 static int 2285 ath_desc_alloc(struct ath_softc *sc) 2286 { 2287 int error; 2288 2289 error = ath_descdma_setup(sc, &sc->sc_rxdma, &sc->sc_rxbuf, 2290 "rx", ATH_RXBUF, 1); 2291 if (error != 0) 2292 return error; 2293 2294 error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf, 2295 "tx", ATH_TXBUF, ATH_TXDESC); 2296 if (error != 0) { 2297 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 2298 return error; 2299 } 2300 2301 error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf, 2302 "beacon", 1, 1); 2303 if (error != 0) { 2304 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 2305 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 2306 return error; 2307 } 2308 return 0; 2309 } 2310 2311 static void 2312 ath_desc_free(struct ath_softc *sc) 2313 { 2314 2315 if (sc->sc_bdma.dd_desc_len != 0) 2316 ath_descdma_cleanup(sc, &sc->sc_bdma, &sc->sc_bbuf); 2317 if (sc->sc_txdma.dd_desc_len != 0) 2318 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 2319 if (sc->sc_rxdma.dd_desc_len != 0) 2320 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 2321 } 2322 2323 static struct ieee80211_node * 2324 ath_node_alloc(struct ieee80211_node_table *nt) 2325 { 2326 struct ieee80211com *ic = nt->nt_ic; 2327 struct ath_softc *sc = ic->ic_ifp->if_softc; 2328 const size_t space = sizeof(struct ath_node) + sc->sc_rc->arc_space; 2329 struct ath_node *an; 2330 2331 an = malloc(space, M_80211_NODE, M_NOWAIT|M_ZERO); 2332 if (an == NULL) { 2333 /* XXX stat+msg */ 2334 return NULL; 2335 } 2336 an->an_avgrssi = ATH_RSSI_DUMMY_MARKER; 2337 an->an_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER; 2338 an->an_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER; 2339 an->an_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER; 2340 ath_rate_node_init(sc, an); 2341 2342 DPRINTF(sc, ATH_DEBUG_NODE, "%s: an %p\n", __func__, an); 2343 return &an->an_node; 2344 } 2345 2346 static void 2347 ath_node_free(struct ieee80211_node *ni) 2348 { 2349 struct ieee80211com *ic = ni->ni_ic; 2350 struct ath_softc *sc = ic->ic_ifp->if_softc; 2351 2352 DPRINTF(sc, ATH_DEBUG_NODE, "%s: ni %p\n", __func__, ni); 2353 2354 ath_rate_node_cleanup(sc, ATH_NODE(ni)); 2355 sc->sc_node_free(ni); 2356 } 2357 2358 static u_int8_t 2359 ath_node_getrssi(const struct ieee80211_node *ni) 2360 { 2361 #define HAL_EP_RND(x, mul) \ 2362 ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul)) 2363 u_int32_t avgrssi = ATH_NODE_CONST(ni)->an_avgrssi; 2364 int32_t rssi; 2365 2366 /* 2367 * When only one frame is received there will be no state in 2368 * avgrssi so fallback on the value recorded by the 802.11 layer. 2369 */ 2370 if (avgrssi != ATH_RSSI_DUMMY_MARKER) 2371 rssi = HAL_EP_RND(avgrssi, HAL_RSSI_EP_MULTIPLIER); 2372 else 2373 rssi = ni->ni_rssi; 2374 /* NB: theoretically we shouldn't need this, but be paranoid */ 2375 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 2376 #undef HAL_EP_RND 2377 } 2378 2379 static int 2380 ath_rxbuf_init(struct ath_softc *sc, struct ath_buf *bf) 2381 { 2382 struct ath_hal *ah = sc->sc_ah; 2383 int error; 2384 struct mbuf *m; 2385 struct ath_desc *ds; 2386 2387 m = bf->bf_m; 2388 if (m == NULL) { 2389 /* 2390 * NB: by assigning a page to the rx dma buffer we 2391 * implicitly satisfy the Atheros requirement that 2392 * this buffer be cache-line-aligned and sized to be 2393 * multiple of the cache line size. Not doing this 2394 * causes weird stuff to happen (for the 5210 at least). 2395 */ 2396 m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 2397 if (m == NULL) { 2398 DPRINTF(sc, ATH_DEBUG_ANY, 2399 "%s: no mbuf/cluster\n", __func__); 2400 sc->sc_stats.ast_rx_nombuf++; 2401 return ENOMEM; 2402 } 2403 bf->bf_m = m; 2404 m->m_pkthdr.len = m->m_len = m->m_ext.ext_size; 2405 2406 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, 2407 bf->bf_dmamap, m, 2408 bf->bf_segs, &bf->bf_nseg, 2409 BUS_DMA_NOWAIT); 2410 if (error != 0) { 2411 DPRINTF(sc, ATH_DEBUG_ANY, 2412 "%s: bus_dmamap_load_mbuf_sg failed; error %d\n", 2413 __func__, error); 2414 sc->sc_stats.ast_rx_busdma++; 2415 return error; 2416 } 2417 KASSERT(bf->bf_nseg == 1, 2418 ("multi-segment packet; nseg %u", bf->bf_nseg)); 2419 } 2420 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREREAD); 2421 2422 /* 2423 * Setup descriptors. For receive we always terminate 2424 * the descriptor list with a self-linked entry so we'll 2425 * not get overrun under high load (as can happen with a 2426 * 5212 when ANI processing enables PHY error frames). 2427 * 2428 * To insure the last descriptor is self-linked we create 2429 * each descriptor as self-linked and add it to the end. As 2430 * each additional descriptor is added the previous self-linked 2431 * entry is ``fixed'' naturally. This should be safe even 2432 * if DMA is happening. When processing RX interrupts we 2433 * never remove/process the last, self-linked, entry on the 2434 * descriptor list. This insures the hardware always has 2435 * someplace to write a new frame. 2436 */ 2437 ds = bf->bf_desc; 2438 ds->ds_link = bf->bf_daddr; /* link to self */ 2439 ds->ds_data = bf->bf_segs[0].ds_addr; 2440 ath_hal_setuprxdesc(ah, ds 2441 , m->m_len /* buffer size */ 2442 , 0 2443 ); 2444 2445 if (sc->sc_rxlink != NULL) 2446 *sc->sc_rxlink = bf->bf_daddr; 2447 sc->sc_rxlink = &ds->ds_link; 2448 return 0; 2449 } 2450 2451 /* 2452 * Extend 15-bit time stamp from rx descriptor to 2453 * a full 64-bit TSF using the current h/w TSF. 2454 */ 2455 static __inline u_int64_t 2456 ath_extend_tsf(struct ath_hal *ah, u_int32_t rstamp) 2457 { 2458 u_int64_t tsf; 2459 2460 tsf = ath_hal_gettsf64(ah); 2461 if ((tsf & 0x7fff) < rstamp) 2462 tsf -= 0x8000; 2463 return ((tsf &~ 0x7fff) | rstamp); 2464 } 2465 2466 /* 2467 * Intercept management frames to collect beacon rssi data 2468 * and to do ibss merges. 2469 */ 2470 static void 2471 ath_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 2472 struct ieee80211_node *ni, 2473 int subtype, int rssi, u_int32_t rstamp) 2474 { 2475 struct ath_softc *sc = ic->ic_ifp->if_softc; 2476 2477 /* 2478 * Call up first so subsequent work can use information 2479 * potentially stored in the node (e.g. for ibss merge). 2480 */ 2481 sc->sc_recv_mgmt(ic, m, ni, subtype, rssi, rstamp); 2482 switch (subtype) { 2483 case IEEE80211_FC0_SUBTYPE_BEACON: 2484 /* update rssi statistics for use by the hal */ 2485 ATH_RSSI_LPF(ATH_NODE(ni)->an_halstats.ns_avgbrssi, rssi); 2486 /* fall thru... */ 2487 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 2488 if (ic->ic_opmode == IEEE80211_M_IBSS && 2489 ic->ic_state == IEEE80211_S_RUN) { 2490 u_int64_t tsf = ath_extend_tsf(sc->sc_ah, rstamp); 2491 /* 2492 * Handle ibss merge as needed; check the tsf on the 2493 * frame before attempting the merge. The 802.11 spec 2494 * says the station should change it's bssid to match 2495 * the oldest station with the same ssid, where oldest 2496 * is determined by the tsf. Note that hardware 2497 * reconfiguration happens through callback to 2498 * ath_newstate as the state machine will go from 2499 * RUN -> RUN when this happens. 2500 */ 2501 if (le64toh(ni->ni_tstamp.tsf) >= tsf) { 2502 DPRINTF(sc, ATH_DEBUG_STATE, 2503 "ibss merge, rstamp %u tsf %ju " 2504 "tstamp %ju\n", rstamp, (uintmax_t)tsf, 2505 (uintmax_t)ni->ni_tstamp.tsf); 2506 (void) ieee80211_ibss_merge(ic, ni); 2507 } 2508 } 2509 break; 2510 } 2511 } 2512 2513 /* 2514 * Set the default antenna. 2515 */ 2516 static void 2517 ath_setdefantenna(struct ath_softc *sc, u_int antenna) 2518 { 2519 struct ath_hal *ah = sc->sc_ah; 2520 2521 /* XXX block beacon interrupts */ 2522 ath_hal_setdefantenna(ah, antenna); 2523 if (sc->sc_defant != antenna) 2524 sc->sc_stats.ast_ant_defswitch++; 2525 sc->sc_defant = antenna; 2526 sc->sc_rxotherant = 0; 2527 } 2528 2529 static void 2530 ath_rx_proc(void *arg, int npending) 2531 { 2532 #define PA2DESC(_sc, _pa) \ 2533 ((struct ath_desc *)((caddr_t)(_sc)->sc_rxdma.dd_desc + \ 2534 ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr))) 2535 struct ath_softc *sc = arg; 2536 struct ath_buf *bf; 2537 struct ieee80211com *ic = &sc->sc_ic; 2538 struct ifnet *ifp = &sc->sc_if; 2539 struct ath_hal *ah = sc->sc_ah; 2540 struct ath_desc *ds; 2541 struct mbuf *m; 2542 struct ieee80211_node *ni; 2543 struct ath_node *an; 2544 int len, type; 2545 u_int phyerr; 2546 HAL_STATUS status; 2547 2548 NET_LOCK_GIANT(); /* XXX */ 2549 2550 DPRINTF(sc, ATH_DEBUG_RX_PROC, "%s: pending %u\n", __func__, npending); 2551 do { 2552 bf = STAILQ_FIRST(&sc->sc_rxbuf); 2553 if (bf == NULL) { /* NB: shouldn't happen */ 2554 if_printf(ifp, "%s: no buffer!\n", __func__); 2555 break; 2556 } 2557 ds = bf->bf_desc; 2558 if (ds->ds_link == bf->bf_daddr) { 2559 /* NB: never process the self-linked entry at the end */ 2560 break; 2561 } 2562 m = bf->bf_m; 2563 if (m == NULL) { /* NB: shouldn't happen */ 2564 if_printf(ifp, "%s: no mbuf!\n", __func__); 2565 continue; 2566 } 2567 /* XXX sync descriptor memory */ 2568 /* 2569 * Must provide the virtual address of the current 2570 * descriptor, the physical address, and the virtual 2571 * address of the next descriptor in the h/w chain. 2572 * This allows the HAL to look ahead to see if the 2573 * hardware is done with a descriptor by checking the 2574 * done bit in the following descriptor and the address 2575 * of the current descriptor the DMA engine is working 2576 * on. All this is necessary because of our use of 2577 * a self-linked list to avoid rx overruns. 2578 */ 2579 status = ath_hal_rxprocdesc(ah, ds, 2580 bf->bf_daddr, PA2DESC(sc, ds->ds_link)); 2581 #ifdef AR_DEBUG 2582 if (sc->sc_debug & ATH_DEBUG_RECV_DESC) 2583 ath_printrxbuf(bf, status == HAL_OK); 2584 #endif 2585 if (status == HAL_EINPROGRESS) 2586 break; 2587 STAILQ_REMOVE_HEAD(&sc->sc_rxbuf, bf_list); 2588 if (ds->ds_rxstat.rs_more) { 2589 /* 2590 * Frame spans multiple descriptors; this 2591 * cannot happen yet as we don't support 2592 * jumbograms. If not in monitor mode, 2593 * discard the frame. 2594 */ 2595 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2596 sc->sc_stats.ast_rx_toobig++; 2597 goto rx_next; 2598 } 2599 /* fall thru for monitor mode handling... */ 2600 } else if (ds->ds_rxstat.rs_status != 0) { 2601 if (ds->ds_rxstat.rs_status & HAL_RXERR_CRC) 2602 sc->sc_stats.ast_rx_crcerr++; 2603 if (ds->ds_rxstat.rs_status & HAL_RXERR_FIFO) 2604 sc->sc_stats.ast_rx_fifoerr++; 2605 if (ds->ds_rxstat.rs_status & HAL_RXERR_PHY) { 2606 sc->sc_stats.ast_rx_phyerr++; 2607 phyerr = ds->ds_rxstat.rs_phyerr & 0x1f; 2608 sc->sc_stats.ast_rx_phy[phyerr]++; 2609 goto rx_next; 2610 } 2611 if (ds->ds_rxstat.rs_status & HAL_RXERR_DECRYPT) { 2612 /* 2613 * Decrypt error. If the error occurred 2614 * because there was no hardware key, then 2615 * let the frame through so the upper layers 2616 * can process it. This is necessary for 5210 2617 * parts which have no way to setup a ``clear'' 2618 * key cache entry. 2619 * 2620 * XXX do key cache faulting 2621 */ 2622 if (ds->ds_rxstat.rs_keyix == HAL_RXKEYIX_INVALID) 2623 goto rx_accept; 2624 sc->sc_stats.ast_rx_badcrypt++; 2625 } 2626 if (ds->ds_rxstat.rs_status & HAL_RXERR_MIC) { 2627 sc->sc_stats.ast_rx_badmic++; 2628 /* 2629 * Do minimal work required to hand off 2630 * the 802.11 header for notifcation. 2631 */ 2632 /* XXX frag's and qos frames */ 2633 len = ds->ds_rxstat.rs_datalen; 2634 if (len >= sizeof (struct ieee80211_frame)) { 2635 bus_dmamap_sync(sc->sc_dmat, 2636 bf->bf_dmamap, 2637 BUS_DMASYNC_POSTREAD); 2638 ieee80211_notify_michael_failure(ic, 2639 mtod(m, struct ieee80211_frame *), 2640 sc->sc_splitmic ? 2641 ds->ds_rxstat.rs_keyix-32 : 2642 ds->ds_rxstat.rs_keyix 2643 ); 2644 } 2645 } 2646 ifp->if_ierrors++; 2647 /* 2648 * Reject error frames, we normally don't want 2649 * to see them in monitor mode (in monitor mode 2650 * allow through packets that have crypto problems). 2651 */ 2652 if ((ds->ds_rxstat.rs_status &~ 2653 (HAL_RXERR_DECRYPT|HAL_RXERR_MIC)) || 2654 sc->sc_ic.ic_opmode != IEEE80211_M_MONITOR) 2655 goto rx_next; 2656 } 2657 rx_accept: 2658 /* 2659 * Sync and unmap the frame. At this point we're 2660 * committed to passing the mbuf somewhere so clear 2661 * bf_m; this means a new sk_buff must be allocated 2662 * when the rx descriptor is setup again to receive 2663 * another frame. 2664 */ 2665 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 2666 BUS_DMASYNC_POSTREAD); 2667 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 2668 bf->bf_m = NULL; 2669 2670 m->m_pkthdr.rcvif = ifp; 2671 len = ds->ds_rxstat.rs_datalen; 2672 m->m_pkthdr.len = m->m_len = len; 2673 2674 sc->sc_stats.ast_ant_rx[ds->ds_rxstat.rs_antenna]++; 2675 2676 if (sc->sc_drvbpf) { 2677 u_int8_t rix; 2678 2679 /* 2680 * Discard anything shorter than an ack or cts. 2681 */ 2682 if (len < IEEE80211_ACK_LEN) { 2683 DPRINTF(sc, ATH_DEBUG_RECV, 2684 "%s: runt packet %d\n", 2685 __func__, len); 2686 sc->sc_stats.ast_rx_tooshort++; 2687 m_freem(m); 2688 goto rx_next; 2689 } 2690 rix = ds->ds_rxstat.rs_rate; 2691 sc->sc_rx_th.wr_flags = sc->sc_hwmap[rix].rxflags; 2692 sc->sc_rx_th.wr_rate = sc->sc_hwmap[rix].ieeerate; 2693 sc->sc_rx_th.wr_antsignal = ds->ds_rxstat.rs_rssi; 2694 sc->sc_rx_th.wr_antenna = ds->ds_rxstat.rs_antenna; 2695 /* XXX TSF */ 2696 2697 bpf_mtap2(sc->sc_drvbpf, 2698 &sc->sc_rx_th, sc->sc_rx_th_len, m); 2699 } 2700 2701 /* 2702 * From this point on we assume the frame is at least 2703 * as large as ieee80211_frame_min; verify that. 2704 */ 2705 if (len < IEEE80211_MIN_LEN) { 2706 DPRINTF(sc, ATH_DEBUG_RECV, "%s: short packet %d\n", 2707 __func__, len); 2708 sc->sc_stats.ast_rx_tooshort++; 2709 m_freem(m); 2710 goto rx_next; 2711 } 2712 2713 if (IFF_DUMPPKTS(sc, ATH_DEBUG_RECV)) { 2714 ieee80211_dump_pkt(mtod(m, caddr_t), len, 2715 sc->sc_hwmap[ds->ds_rxstat.rs_rate].ieeerate, 2716 ds->ds_rxstat.rs_rssi); 2717 } 2718 2719 m_adj(m, -IEEE80211_CRC_LEN); 2720 2721 /* 2722 * Locate the node for sender, track state, and then 2723 * pass the (referenced) node up to the 802.11 layer 2724 * for its use. 2725 */ 2726 ni = ieee80211_find_rxnode(ic, 2727 mtod(m, const struct ieee80211_frame_min *)); 2728 2729 /* 2730 * Track rx rssi and do any rx antenna management. 2731 */ 2732 an = ATH_NODE(ni); 2733 ATH_RSSI_LPF(an->an_avgrssi, ds->ds_rxstat.rs_rssi); 2734 if (sc->sc_diversity) { 2735 /* 2736 * When using fast diversity, change the default rx 2737 * antenna if diversity chooses the other antenna 3 2738 * times in a row. 2739 */ 2740 if (sc->sc_defant != ds->ds_rxstat.rs_antenna) { 2741 if (++sc->sc_rxotherant >= 3) 2742 ath_setdefantenna(sc, 2743 ds->ds_rxstat.rs_antenna); 2744 } else 2745 sc->sc_rxotherant = 0; 2746 } 2747 2748 /* 2749 * Send frame up for processing. 2750 */ 2751 type = ieee80211_input(ic, m, ni, 2752 ds->ds_rxstat.rs_rssi, ds->ds_rxstat.rs_tstamp); 2753 2754 if (sc->sc_softled) { 2755 /* 2756 * Blink for any data frame. Otherwise do a 2757 * heartbeat-style blink when idle. The latter 2758 * is mainly for station mode where we depend on 2759 * periodic beacon frames to trigger the poll event. 2760 */ 2761 if (type == IEEE80211_FC0_TYPE_DATA) { 2762 sc->sc_rxrate = ds->ds_rxstat.rs_rate; 2763 ath_led_event(sc, ATH_LED_RX); 2764 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle) 2765 ath_led_event(sc, ATH_LED_POLL); 2766 } 2767 2768 /* 2769 * Reclaim node reference. 2770 */ 2771 ieee80211_free_node(ni); 2772 rx_next: 2773 STAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list); 2774 } while (ath_rxbuf_init(sc, bf) == 0); 2775 2776 /* rx signal state monitoring */ 2777 ath_hal_rxmonitor(ah, &ATH_NODE(ic->ic_bss)->an_halstats); 2778 2779 NET_UNLOCK_GIANT(); /* XXX */ 2780 #undef PA2DESC 2781 } 2782 2783 /* 2784 * Setup a h/w transmit queue. 2785 */ 2786 static struct ath_txq * 2787 ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) 2788 { 2789 #define N(a) (sizeof(a)/sizeof(a[0])) 2790 struct ath_hal *ah = sc->sc_ah; 2791 HAL_TXQ_INFO qi; 2792 int qnum; 2793 2794 memset(&qi, 0, sizeof(qi)); 2795 qi.tqi_subtype = subtype; 2796 qi.tqi_aifs = HAL_TXQ_USEDEFAULT; 2797 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; 2798 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; 2799 /* 2800 * Enable interrupts only for EOL and DESC conditions. 2801 * We mark tx descriptors to receive a DESC interrupt 2802 * when a tx queue gets deep; otherwise waiting for the 2803 * EOL to reap descriptors. Note that this is done to 2804 * reduce interrupt load and this only defers reaping 2805 * descriptors, never transmitting frames. Aside from 2806 * reducing interrupts this also permits more concurrency. 2807 * The only potential downside is if the tx queue backs 2808 * up in which case the top half of the kernel may backup 2809 * due to a lack of tx descriptors. 2810 */ 2811 qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | TXQ_FLAG_TXDESCINT_ENABLE; 2812 qnum = ath_hal_setuptxqueue(ah, qtype, &qi); 2813 if (qnum == -1) { 2814 /* 2815 * NB: don't print a message, this happens 2816 * normally on parts with too few tx queues 2817 */ 2818 return NULL; 2819 } 2820 if (qnum >= N(sc->sc_txq)) { 2821 device_printf(sc->sc_dev, 2822 "hal qnum %u out of range, max %zu!\n", 2823 qnum, N(sc->sc_txq)); 2824 ath_hal_releasetxqueue(ah, qnum); 2825 return NULL; 2826 } 2827 if (!ATH_TXQ_SETUP(sc, qnum)) { 2828 struct ath_txq *txq = &sc->sc_txq[qnum]; 2829 2830 txq->axq_qnum = qnum; 2831 txq->axq_depth = 0; 2832 txq->axq_intrcnt = 0; 2833 txq->axq_link = NULL; 2834 STAILQ_INIT(&txq->axq_q); 2835 ATH_TXQ_LOCK_INIT(sc, txq); 2836 sc->sc_txqsetup |= 1<<qnum; 2837 } 2838 return &sc->sc_txq[qnum]; 2839 #undef N 2840 } 2841 2842 /* 2843 * Setup a hardware data transmit queue for the specified 2844 * access control. The hal may not support all requested 2845 * queues in which case it will return a reference to a 2846 * previously setup queue. We record the mapping from ac's 2847 * to h/w queues for use by ath_tx_start and also track 2848 * the set of h/w queues being used to optimize work in the 2849 * transmit interrupt handler and related routines. 2850 */ 2851 static int 2852 ath_tx_setup(struct ath_softc *sc, int ac, int haltype) 2853 { 2854 #define N(a) (sizeof(a)/sizeof(a[0])) 2855 struct ath_txq *txq; 2856 2857 if (ac >= N(sc->sc_ac2q)) { 2858 device_printf(sc->sc_dev, "AC %u out of range, max %zu!\n", 2859 ac, N(sc->sc_ac2q)); 2860 return 0; 2861 } 2862 txq = ath_txq_setup(sc, HAL_TX_QUEUE_DATA, haltype); 2863 if (txq != NULL) { 2864 sc->sc_ac2q[ac] = txq; 2865 return 1; 2866 } else 2867 return 0; 2868 #undef N 2869 } 2870 2871 /* 2872 * Update WME parameters for a transmit queue. 2873 */ 2874 static int 2875 ath_txq_update(struct ath_softc *sc, int ac) 2876 { 2877 #define ATH_EXPONENT_TO_VALUE(v) ((1<<v)-1) 2878 #define ATH_TXOP_TO_US(v) (v<<5) 2879 struct ieee80211com *ic = &sc->sc_ic; 2880 struct ath_txq *txq = sc->sc_ac2q[ac]; 2881 struct wmeParams *wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 2882 struct ath_hal *ah = sc->sc_ah; 2883 HAL_TXQ_INFO qi; 2884 2885 ath_hal_gettxqueueprops(ah, txq->axq_qnum, &qi); 2886 qi.tqi_aifs = wmep->wmep_aifsn; 2887 qi.tqi_cwmin = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); 2888 qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); 2889 qi.tqi_burstTime = ATH_TXOP_TO_US(wmep->wmep_txopLimit); 2890 2891 if (!ath_hal_settxqueueprops(ah, txq->axq_qnum, &qi)) { 2892 device_printf(sc->sc_dev, "unable to update hardware queue " 2893 "parameters for %s traffic!\n", 2894 ieee80211_wme_acnames[ac]); 2895 return 0; 2896 } else { 2897 ath_hal_resettxqueue(ah, txq->axq_qnum); /* push to h/w */ 2898 return 1; 2899 } 2900 #undef ATH_TXOP_TO_US 2901 #undef ATH_EXPONENT_TO_VALUE 2902 } 2903 2904 /* 2905 * Callback from the 802.11 layer to update WME parameters. 2906 */ 2907 static int 2908 ath_wme_update(struct ieee80211com *ic) 2909 { 2910 struct ath_softc *sc = ic->ic_ifp->if_softc; 2911 2912 return !ath_txq_update(sc, WME_AC_BE) || 2913 !ath_txq_update(sc, WME_AC_BK) || 2914 !ath_txq_update(sc, WME_AC_VI) || 2915 !ath_txq_update(sc, WME_AC_VO) ? EIO : 0; 2916 } 2917 2918 /* 2919 * Reclaim resources for a setup queue. 2920 */ 2921 static void 2922 ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) 2923 { 2924 2925 ath_hal_releasetxqueue(sc->sc_ah, txq->axq_qnum); 2926 ATH_TXQ_LOCK_DESTROY(txq); 2927 sc->sc_txqsetup &= ~(1<<txq->axq_qnum); 2928 } 2929 2930 /* 2931 * Reclaim all tx queue resources. 2932 */ 2933 static void 2934 ath_tx_cleanup(struct ath_softc *sc) 2935 { 2936 int i; 2937 2938 ATH_TXBUF_LOCK_DESTROY(sc); 2939 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 2940 if (ATH_TXQ_SETUP(sc, i)) 2941 ath_tx_cleanupq(sc, &sc->sc_txq[i]); 2942 } 2943 2944 /* 2945 * Defragment an mbuf chain, returning at most maxfrags separate 2946 * mbufs+clusters. If this is not possible NULL is returned and 2947 * the original mbuf chain is left in it's present (potentially 2948 * modified) state. We use two techniques: collapsing consecutive 2949 * mbufs and replacing consecutive mbufs by a cluster. 2950 */ 2951 static struct mbuf * 2952 ath_defrag(struct mbuf *m0, int how, int maxfrags) 2953 { 2954 struct mbuf *m, *n, *n2, **prev; 2955 u_int curfrags; 2956 2957 /* 2958 * Calculate the current number of frags. 2959 */ 2960 curfrags = 0; 2961 for (m = m0; m != NULL; m = m->m_next) 2962 curfrags++; 2963 /* 2964 * First, try to collapse mbufs. Note that we always collapse 2965 * towards the front so we don't need to deal with moving the 2966 * pkthdr. This may be suboptimal if the first mbuf has much 2967 * less data than the following. 2968 */ 2969 m = m0; 2970 again: 2971 for (;;) { 2972 n = m->m_next; 2973 if (n == NULL) 2974 break; 2975 if ((m->m_flags & M_RDONLY) == 0 && 2976 n->m_len < M_TRAILINGSPACE(m)) { 2977 bcopy(mtod(n, void *), mtod(m, char *) + m->m_len, 2978 n->m_len); 2979 m->m_len += n->m_len; 2980 m->m_next = n->m_next; 2981 m_free(n); 2982 if (--curfrags <= maxfrags) 2983 return m0; 2984 } else 2985 m = n; 2986 } 2987 KASSERT(maxfrags > 1, 2988 ("maxfrags %u, but normal collapse failed", maxfrags)); 2989 /* 2990 * Collapse consecutive mbufs to a cluster. 2991 */ 2992 prev = &m0->m_next; /* NB: not the first mbuf */ 2993 while ((n = *prev) != NULL) { 2994 if ((n2 = n->m_next) != NULL && 2995 n->m_len + n2->m_len < MCLBYTES) { 2996 m = m_getcl(how, MT_DATA, 0); 2997 if (m == NULL) 2998 goto bad; 2999 bcopy(mtod(n, void *), mtod(m, void *), n->m_len); 3000 bcopy(mtod(n2, void *), mtod(m, char *) + n->m_len, 3001 n2->m_len); 3002 m->m_len = n->m_len + n2->m_len; 3003 m->m_next = n2->m_next; 3004 *prev = m; 3005 m_free(n); 3006 m_free(n2); 3007 if (--curfrags <= maxfrags) /* +1 cl -2 mbufs */ 3008 return m0; 3009 /* 3010 * Still not there, try the normal collapse 3011 * again before we allocate another cluster. 3012 */ 3013 goto again; 3014 } 3015 prev = &n->m_next; 3016 } 3017 /* 3018 * No place where we can collapse to a cluster; punt. 3019 * This can occur if, for example, you request 2 frags 3020 * but the packet requires that both be clusters (we 3021 * never reallocate the first mbuf to avoid moving the 3022 * packet header). 3023 */ 3024 bad: 3025 return NULL; 3026 } 3027 3028 static int 3029 ath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_buf *bf, 3030 struct mbuf *m0) 3031 { 3032 #define CTS_DURATION \ 3033 ath_hal_computetxtime(ah, rt, IEEE80211_ACK_LEN, cix, AH_TRUE) 3034 #define updateCTSForBursting(_ah, _ds, _txq) \ 3035 ath_hal_updateCTSForBursting(_ah, _ds, \ 3036 _txq->axq_linkbuf != NULL ? _txq->axq_linkbuf->bf_desc : NULL, \ 3037 _txq->axq_lastdsWithCTS, _txq->axq_gatingds, \ 3038 txopLimit, CTS_DURATION) 3039 struct ieee80211com *ic = &sc->sc_ic; 3040 struct ath_hal *ah = sc->sc_ah; 3041 struct ifnet *ifp = &sc->sc_if; 3042 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 3043 int i, error, iswep, ismcast, keyix, hdrlen, pktlen, try0; 3044 u_int8_t rix, txrate, ctsrate; 3045 u_int8_t cix = 0xff; /* NB: silence compiler */ 3046 struct ath_desc *ds, *ds0; 3047 struct ath_txq *txq; 3048 struct ieee80211_frame *wh; 3049 u_int subtype, flags, ctsduration; 3050 HAL_PKT_TYPE atype; 3051 const HAL_RATE_TABLE *rt; 3052 HAL_BOOL shortPreamble; 3053 struct ath_node *an; 3054 struct mbuf *m; 3055 u_int pri; 3056 3057 wh = mtod(m0, struct ieee80211_frame *); 3058 iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 3059 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 3060 hdrlen = ieee80211_anyhdrsize(wh); 3061 /* 3062 * Packet length must not include any 3063 * pad bytes; deduct them here. 3064 */ 3065 pktlen = m0->m_pkthdr.len - (hdrlen & 3); 3066 3067 if (iswep) { 3068 const struct ieee80211_cipher *cip; 3069 struct ieee80211_key *k; 3070 3071 /* 3072 * Construct the 802.11 header+trailer for an encrypted 3073 * frame. The only reason this can fail is because of an 3074 * unknown or unsupported cipher/key type. 3075 */ 3076 k = ieee80211_crypto_encap(ic, ni, m0); 3077 if (k == NULL) { 3078 /* 3079 * This can happen when the key is yanked after the 3080 * frame was queued. Just discard the frame; the 3081 * 802.11 layer counts failures and provides 3082 * debugging/diagnostics. 3083 */ 3084 m_freem(m0); 3085 return EIO; 3086 } 3087 /* 3088 * Adjust the packet + header lengths for the crypto 3089 * additions and calculate the h/w key index. When 3090 * a s/w mic is done the frame will have had any mic 3091 * added to it prior to entry so skb->len above will 3092 * account for it. Otherwise we need to add it to the 3093 * packet length. 3094 */ 3095 cip = k->wk_cipher; 3096 hdrlen += cip->ic_header; 3097 pktlen += cip->ic_header + cip->ic_trailer; 3098 if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0) 3099 pktlen += cip->ic_miclen; 3100 keyix = k->wk_keyix; 3101 3102 /* packet header may have moved, reset our local pointer */ 3103 wh = mtod(m0, struct ieee80211_frame *); 3104 } else 3105 keyix = HAL_TXKEYIX_INVALID; 3106 3107 pktlen += IEEE80211_CRC_LEN; 3108 3109 /* 3110 * Load the DMA map so any coalescing is done. This 3111 * also calculates the number of descriptors we need. 3112 */ 3113 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 3114 bf->bf_segs, &bf->bf_nseg, 3115 BUS_DMA_NOWAIT); 3116 if (error == EFBIG) { 3117 /* XXX packet requires too many descriptors */ 3118 bf->bf_nseg = ATH_TXDESC+1; 3119 } else if (error != 0) { 3120 sc->sc_stats.ast_tx_busdma++; 3121 m_freem(m0); 3122 return error; 3123 } 3124 /* 3125 * Discard null packets and check for packets that 3126 * require too many TX descriptors. We try to convert 3127 * the latter to a cluster. 3128 */ 3129 if (bf->bf_nseg > ATH_TXDESC) { /* too many desc's, linearize */ 3130 sc->sc_stats.ast_tx_linear++; 3131 m = ath_defrag(m0, M_DONTWAIT, ATH_TXDESC); 3132 if (m == NULL) { 3133 m_freem(m0); 3134 sc->sc_stats.ast_tx_nombuf++; 3135 return ENOMEM; 3136 } 3137 m0 = m; 3138 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 3139 bf->bf_segs, &bf->bf_nseg, 3140 BUS_DMA_NOWAIT); 3141 if (error != 0) { 3142 sc->sc_stats.ast_tx_busdma++; 3143 m_freem(m0); 3144 return error; 3145 } 3146 KASSERT(bf->bf_nseg <= ATH_TXDESC, 3147 ("too many segments after defrag; nseg %u", bf->bf_nseg)); 3148 } else if (bf->bf_nseg == 0) { /* null packet, discard */ 3149 sc->sc_stats.ast_tx_nodata++; 3150 m_freem(m0); 3151 return EIO; 3152 } 3153 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", __func__, m0, pktlen); 3154 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 3155 bf->bf_m = m0; 3156 bf->bf_node = ni; /* NB: held reference */ 3157 3158 /* setup descriptors */ 3159 ds = bf->bf_desc; 3160 rt = sc->sc_currates; 3161 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 3162 3163 /* 3164 * NB: the 802.11 layer marks whether or not we should 3165 * use short preamble based on the current mode and 3166 * negotiated parameters. 3167 */ 3168 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 3169 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 3170 shortPreamble = AH_TRUE; 3171 sc->sc_stats.ast_tx_shortpre++; 3172 } else { 3173 shortPreamble = AH_FALSE; 3174 } 3175 3176 an = ATH_NODE(ni); 3177 flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 3178 /* 3179 * Calculate Atheros packet type from IEEE80211 packet header, 3180 * setup for rate calculations, and select h/w transmit queue. 3181 */ 3182 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 3183 case IEEE80211_FC0_TYPE_MGT: 3184 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 3185 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 3186 atype = HAL_PKT_TYPE_BEACON; 3187 else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 3188 atype = HAL_PKT_TYPE_PROBE_RESP; 3189 else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 3190 atype = HAL_PKT_TYPE_ATIM; 3191 else 3192 atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 3193 rix = 0; /* XXX lowest rate */ 3194 try0 = ATH_TXMAXTRY; 3195 if (shortPreamble) 3196 txrate = an->an_tx_mgtratesp; 3197 else 3198 txrate = an->an_tx_mgtrate; 3199 /* NB: force all management frames to highest queue */ 3200 if (ni->ni_flags & IEEE80211_NODE_QOS) { 3201 /* NB: force all management frames to highest queue */ 3202 pri = WME_AC_VO; 3203 } else 3204 pri = WME_AC_BE; 3205 flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 3206 break; 3207 case IEEE80211_FC0_TYPE_CTL: 3208 atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 3209 rix = 0; /* XXX lowest rate */ 3210 try0 = ATH_TXMAXTRY; 3211 if (shortPreamble) 3212 txrate = an->an_tx_mgtratesp; 3213 else 3214 txrate = an->an_tx_mgtrate; 3215 /* NB: force all ctl frames to highest queue */ 3216 if (ni->ni_flags & IEEE80211_NODE_QOS) { 3217 /* NB: force all ctl frames to highest queue */ 3218 pri = WME_AC_VO; 3219 } else 3220 pri = WME_AC_BE; 3221 flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 3222 break; 3223 case IEEE80211_FC0_TYPE_DATA: 3224 atype = HAL_PKT_TYPE_NORMAL; /* default */ 3225 /* 3226 * Data frames; consult the rate control module. 3227 */ 3228 ath_rate_findrate(sc, an, shortPreamble, pktlen, 3229 &rix, &try0, &txrate); 3230 sc->sc_txrate = txrate; /* for LED blinking */ 3231 /* 3232 * Default all non-QoS traffic to the background queue. 3233 */ 3234 if (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_QOS) { 3235 pri = M_WME_GETAC(m0); 3236 if (cap->cap_wmeParams[pri].wmep_noackPolicy) { 3237 flags |= HAL_TXDESC_NOACK; 3238 sc->sc_stats.ast_tx_noack++; 3239 } 3240 } else 3241 pri = WME_AC_BE; 3242 break; 3243 default: 3244 if_printf(ifp, "bogus frame type 0x%x (%s)\n", 3245 wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 3246 /* XXX statistic */ 3247 m_freem(m0); 3248 return EIO; 3249 } 3250 txq = sc->sc_ac2q[pri]; 3251 3252 /* 3253 * When servicing one or more stations in power-save mode 3254 * multicast frames must be buffered until after the beacon. 3255 * We use the CAB queue for that. 3256 */ 3257 if (ismcast && ic->ic_ps_sta) { 3258 txq = sc->sc_cabq; 3259 /* XXX? more bit in 802.11 frame header */ 3260 } 3261 3262 /* 3263 * Calculate miscellaneous flags. 3264 */ 3265 if (ismcast) { 3266 flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 3267 sc->sc_stats.ast_tx_noack++; 3268 } else if (pktlen > ic->ic_rtsthreshold) { 3269 flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 3270 cix = rt->info[rix].controlRate; 3271 sc->sc_stats.ast_tx_rts++; 3272 } 3273 3274 /* 3275 * If 802.11g protection is enabled, determine whether 3276 * to use RTS/CTS or just CTS. Note that this is only 3277 * done for OFDM unicast frames. 3278 */ 3279 if ((ic->ic_flags & IEEE80211_F_USEPROT) && 3280 rt->info[rix].phy == IEEE80211_T_OFDM && 3281 (flags & HAL_TXDESC_NOACK) == 0) { 3282 /* XXX fragments must use CCK rates w/ protection */ 3283 if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) 3284 flags |= HAL_TXDESC_RTSENA; 3285 else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) 3286 flags |= HAL_TXDESC_CTSENA; 3287 cix = rt->info[sc->sc_protrix].controlRate; 3288 sc->sc_stats.ast_tx_protect++; 3289 } 3290 3291 /* 3292 * Calculate duration. This logically belongs in the 802.11 3293 * layer but it lacks sufficient information to calculate it. 3294 */ 3295 if ((flags & HAL_TXDESC_NOACK) == 0 && 3296 (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 3297 u_int16_t dur; 3298 /* 3299 * XXX not right with fragmentation. 3300 */ 3301 if (shortPreamble) 3302 dur = rt->info[rix].spAckDuration; 3303 else 3304 dur = rt->info[rix].lpAckDuration; 3305 *(u_int16_t *)wh->i_dur = htole16(dur); 3306 } 3307 3308 /* 3309 * Calculate RTS/CTS rate and duration if needed. 3310 */ 3311 ctsduration = 0; 3312 if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) { 3313 /* 3314 * CTS transmit rate is derived from the transmit rate 3315 * by looking in the h/w rate table. We must also factor 3316 * in whether or not a short preamble is to be used. 3317 */ 3318 /* NB: cix is set above where RTS/CTS is enabled */ 3319 KASSERT(cix != 0xff, ("cix not setup")); 3320 ctsrate = rt->info[cix].rateCode; 3321 /* 3322 * Compute the transmit duration based on the frame 3323 * size and the size of an ACK frame. We call into the 3324 * HAL to do the computation since it depends on the 3325 * characteristics of the actual PHY being used. 3326 * 3327 * NB: CTS is assumed the same size as an ACK so we can 3328 * use the precalculated ACK durations. 3329 */ 3330 if (shortPreamble) { 3331 ctsrate |= rt->info[cix].shortPreamble; 3332 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 3333 ctsduration += rt->info[cix].spAckDuration; 3334 ctsduration += ath_hal_computetxtime(ah, 3335 rt, pktlen, rix, AH_TRUE); 3336 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 3337 ctsduration += rt->info[cix].spAckDuration; 3338 } else { 3339 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 3340 ctsduration += rt->info[cix].lpAckDuration; 3341 ctsduration += ath_hal_computetxtime(ah, 3342 rt, pktlen, rix, AH_FALSE); 3343 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 3344 ctsduration += rt->info[cix].lpAckDuration; 3345 } 3346 /* 3347 * Must disable multi-rate retry when using RTS/CTS. 3348 */ 3349 try0 = ATH_TXMAXTRY; 3350 } else 3351 ctsrate = 0; 3352 3353 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 3354 ieee80211_dump_pkt(mtod(m0, caddr_t), m0->m_len, 3355 sc->sc_hwmap[txrate].ieeerate, -1); 3356 3357 if (ic->ic_rawbpf) 3358 bpf_mtap(ic->ic_rawbpf, m0); 3359 if (sc->sc_drvbpf) { 3360 sc->sc_tx_th.wt_flags = sc->sc_hwmap[txrate].txflags; 3361 if (iswep) 3362 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 3363 sc->sc_tx_th.wt_rate = sc->sc_hwmap[txrate].ieeerate; 3364 sc->sc_tx_th.wt_txpower = ni->ni_txpower; 3365 sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 3366 3367 bpf_mtap2(sc->sc_drvbpf, 3368 &sc->sc_tx_th, sc->sc_tx_th_len, m0); 3369 } 3370 3371 /* 3372 * Determine if a tx interrupt should be generated for 3373 * this descriptor. We take a tx interrupt to reap 3374 * descriptors when the h/w hits an EOL condition or 3375 * when the descriptor is specifically marked to generate 3376 * an interrupt. We periodically mark descriptors in this 3377 * way to insure timely replenishing of the supply needed 3378 * for sending frames. Defering interrupts reduces system 3379 * load and potentially allows more concurrent work to be 3380 * done but if done to aggressively can cause senders to 3381 * backup. 3382 * 3383 * NB: use >= to deal with sc_txintrperiod changing 3384 * dynamically through sysctl. 3385 */ 3386 if (flags & HAL_TXDESC_INTREQ) { 3387 txq->axq_intrcnt = 0; 3388 } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 3389 flags |= HAL_TXDESC_INTREQ; 3390 txq->axq_intrcnt = 0; 3391 } 3392 3393 /* 3394 * Formulate first tx descriptor with tx controls. 3395 */ 3396 /* XXX check return value? */ 3397 ath_hal_setuptxdesc(ah, ds 3398 , pktlen /* packet length */ 3399 , hdrlen /* header length */ 3400 , atype /* Atheros packet type */ 3401 , ni->ni_txpower /* txpower */ 3402 , txrate, try0 /* series 0 rate/tries */ 3403 , keyix /* key cache index */ 3404 , sc->sc_txantenna /* antenna mode */ 3405 , flags /* flags */ 3406 , ctsrate /* rts/cts rate */ 3407 , ctsduration /* rts/cts duration */ 3408 ); 3409 /* 3410 * Setup the multi-rate retry state only when we're 3411 * going to use it. This assumes ath_hal_setuptxdesc 3412 * initializes the descriptors (so we don't have to) 3413 * when the hardware supports multi-rate retry and 3414 * we don't use it. 3415 */ 3416 if (try0 != ATH_TXMAXTRY) 3417 ath_rate_setupxtxdesc(sc, an, ds, shortPreamble, rix); 3418 3419 /* 3420 * Fillin the remainder of the descriptor info. 3421 */ 3422 ds0 = ds; 3423 for (i = 0; i < bf->bf_nseg; i++, ds++) { 3424 ds->ds_data = bf->bf_segs[i].ds_addr; 3425 if (i == bf->bf_nseg - 1) 3426 ds->ds_link = 0; 3427 else 3428 ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 3429 ath_hal_filltxdesc(ah, ds 3430 , bf->bf_segs[i].ds_len /* segment length */ 3431 , i == 0 /* first segment */ 3432 , i == bf->bf_nseg - 1 /* last segment */ 3433 , ds0 /* first descriptor */ 3434 ); 3435 DPRINTF(sc, ATH_DEBUG_XMIT, 3436 "%s: %d: %08x %08x %08x %08x %08x %08x\n", 3437 __func__, i, ds->ds_link, ds->ds_data, 3438 ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 3439 } 3440 /* 3441 * Insert the frame on the outbound list and 3442 * pass it on to the hardware. 3443 */ 3444 ATH_TXQ_LOCK(txq); 3445 if (flags & (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) { 3446 u_int32_t txopLimit = IEEE80211_TXOP_TO_US( 3447 cap->cap_wmeParams[pri].wmep_txopLimit); 3448 /* 3449 * When bursting, potentially extend the CTS duration 3450 * of a previously queued frame to cover this frame 3451 * and not exceed the txopLimit. If that can be done 3452 * then disable RTS/CTS on this frame since it's now 3453 * covered (burst extension). Otherwise we must terminate 3454 * the burst before this frame goes out so as not to 3455 * violate the WME parameters. All this is complicated 3456 * as we need to update the state of packets on the 3457 * (live) hardware queue. The logic is buried in the hal 3458 * because it's highly chip-specific. 3459 */ 3460 if (txopLimit != 0) { 3461 sc->sc_stats.ast_tx_ctsburst++; 3462 if (updateCTSForBursting(ah, ds0, txq) == 0) { 3463 /* 3464 * This frame was not covered by RTS/CTS from 3465 * the previous frame in the burst; update the 3466 * descriptor pointers so this frame is now 3467 * treated as the last frame for extending a 3468 * burst. 3469 */ 3470 txq->axq_lastdsWithCTS = ds0; 3471 /* set gating Desc to final desc */ 3472 txq->axq_gatingds = 3473 (struct ath_desc *)txq->axq_link; 3474 } else 3475 sc->sc_stats.ast_tx_ctsext++; 3476 } 3477 } 3478 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 3479 if (txq->axq_link == NULL) { 3480 ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 3481 DPRINTF(sc, ATH_DEBUG_XMIT, 3482 "%s: TXDP[%u] = %p (%p) depth %d\n", __func__, 3483 txq->axq_qnum, (caddr_t)bf->bf_daddr, bf->bf_desc, 3484 txq->axq_depth); 3485 } else { 3486 *txq->axq_link = bf->bf_daddr; 3487 DPRINTF(sc, ATH_DEBUG_XMIT, 3488 "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 3489 txq->axq_qnum, txq->axq_link, 3490 (caddr_t)bf->bf_daddr, bf->bf_desc, txq->axq_depth); 3491 } 3492 txq->axq_link = &bf->bf_desc[bf->bf_nseg - 1].ds_link; 3493 /* 3494 * The CAB queue is started from the SWBA handler since 3495 * frames only go out on DTIM and to avoid possible races. 3496 */ 3497 if (txq != sc->sc_cabq) 3498 ath_hal_txstart(ah, txq->axq_qnum); 3499 ATH_TXQ_UNLOCK(txq); 3500 3501 return 0; 3502 #undef updateCTSForBursting 3503 #undef CTS_DURATION 3504 } 3505 3506 /* 3507 * Process completed xmit descriptors from the specified queue. 3508 */ 3509 static void 3510 ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) 3511 { 3512 struct ath_hal *ah = sc->sc_ah; 3513 struct ieee80211com *ic = &sc->sc_ic; 3514 struct ath_buf *bf; 3515 struct ath_desc *ds, *ds0; 3516 struct ieee80211_node *ni; 3517 struct ath_node *an; 3518 int sr, lr, pri; 3519 HAL_STATUS status; 3520 3521 DPRINTF(sc, ATH_DEBUG_TX_PROC, "%s: tx queue %u head %p link %p\n", 3522 __func__, txq->axq_qnum, 3523 (caddr_t)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum), 3524 txq->axq_link); 3525 for (;;) { 3526 ATH_TXQ_LOCK(txq); 3527 txq->axq_intrcnt = 0; /* reset periodic desc intr count */ 3528 bf = STAILQ_FIRST(&txq->axq_q); 3529 if (bf == NULL) { 3530 txq->axq_link = NULL; 3531 ATH_TXQ_UNLOCK(txq); 3532 break; 3533 } 3534 ds0 = &bf->bf_desc[0]; 3535 ds = &bf->bf_desc[bf->bf_nseg - 1]; 3536 status = ath_hal_txprocdesc(ah, ds); 3537 #ifdef AR_DEBUG 3538 if (sc->sc_debug & ATH_DEBUG_XMIT_DESC) 3539 ath_printtxbuf(bf, status == HAL_OK); 3540 #endif 3541 if (status == HAL_EINPROGRESS) { 3542 ATH_TXQ_UNLOCK(txq); 3543 break; 3544 } 3545 if (ds0 == txq->axq_lastdsWithCTS) 3546 txq->axq_lastdsWithCTS = NULL; 3547 if (ds == txq->axq_gatingds) 3548 txq->axq_gatingds = NULL; 3549 ATH_TXQ_REMOVE_HEAD(txq, bf_list); 3550 ATH_TXQ_UNLOCK(txq); 3551 3552 ni = bf->bf_node; 3553 if (ni != NULL) { 3554 an = ATH_NODE(ni); 3555 if (ds->ds_txstat.ts_status == 0) { 3556 u_int8_t txant = ds->ds_txstat.ts_antenna; 3557 sc->sc_stats.ast_ant_tx[txant]++; 3558 sc->sc_ant_tx[txant]++; 3559 if (ds->ds_txstat.ts_rate & HAL_TXSTAT_ALTRATE) 3560 sc->sc_stats.ast_tx_altrate++; 3561 sc->sc_stats.ast_tx_rssi = 3562 ds->ds_txstat.ts_rssi; 3563 ATH_RSSI_LPF(an->an_halstats.ns_avgtxrssi, 3564 ds->ds_txstat.ts_rssi); 3565 pri = M_WME_GETAC(bf->bf_m); 3566 if (pri >= WME_AC_VO) 3567 ic->ic_wme.wme_hipri_traffic++; 3568 ni->ni_inact = ni->ni_inact_reload; 3569 } else { 3570 if (ds->ds_txstat.ts_status & HAL_TXERR_XRETRY) 3571 sc->sc_stats.ast_tx_xretries++; 3572 if (ds->ds_txstat.ts_status & HAL_TXERR_FIFO) 3573 sc->sc_stats.ast_tx_fifoerr++; 3574 if (ds->ds_txstat.ts_status & HAL_TXERR_FILT) 3575 sc->sc_stats.ast_tx_filtered++; 3576 } 3577 sr = ds->ds_txstat.ts_shortretry; 3578 lr = ds->ds_txstat.ts_longretry; 3579 sc->sc_stats.ast_tx_shortretry += sr; 3580 sc->sc_stats.ast_tx_longretry += lr; 3581 /* 3582 * Hand the descriptor to the rate control algorithm. 3583 */ 3584 ath_rate_tx_complete(sc, an, ds, ds0); 3585 /* 3586 * Reclaim reference to node. 3587 * 3588 * NB: the node may be reclaimed here if, for example 3589 * this is a DEAUTH message that was sent and the 3590 * node was timed out due to inactivity. 3591 */ 3592 ieee80211_free_node(ni); 3593 } 3594 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3595 BUS_DMASYNC_POSTWRITE); 3596 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 3597 m_freem(bf->bf_m); 3598 bf->bf_m = NULL; 3599 bf->bf_node = NULL; 3600 3601 ATH_TXBUF_LOCK(sc); 3602 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 3603 ATH_TXBUF_UNLOCK(sc); 3604 } 3605 } 3606 3607 /* 3608 * Deferred processing of transmit interrupt; special-cased 3609 * for a single hardware transmit queue (e.g. 5210 and 5211). 3610 */ 3611 static void 3612 ath_tx_proc_q0(void *arg, int npending) 3613 { 3614 struct ath_softc *sc = arg; 3615 struct ifnet *ifp = &sc->sc_if; 3616 3617 ath_tx_processq(sc, &sc->sc_txq[0]); 3618 ath_tx_processq(sc, sc->sc_cabq); 3619 ifp->if_flags &= ~IFF_OACTIVE; 3620 sc->sc_tx_timer = 0; 3621 3622 if (sc->sc_softled) 3623 ath_led_event(sc, ATH_LED_TX); 3624 3625 ath_start(ifp); 3626 } 3627 3628 /* 3629 * Deferred processing of transmit interrupt; special-cased 3630 * for four hardware queues, 0-3 (e.g. 5212 w/ WME support). 3631 */ 3632 static void 3633 ath_tx_proc_q0123(void *arg, int npending) 3634 { 3635 struct ath_softc *sc = arg; 3636 struct ifnet *ifp = &sc->sc_if; 3637 3638 /* 3639 * Process each active queue. 3640 */ 3641 ath_tx_processq(sc, &sc->sc_txq[0]); 3642 ath_tx_processq(sc, &sc->sc_txq[1]); 3643 ath_tx_processq(sc, &sc->sc_txq[2]); 3644 ath_tx_processq(sc, &sc->sc_txq[3]); 3645 ath_tx_processq(sc, sc->sc_cabq); 3646 3647 ifp->if_flags &= ~IFF_OACTIVE; 3648 sc->sc_tx_timer = 0; 3649 3650 if (sc->sc_softled) 3651 ath_led_event(sc, ATH_LED_TX); 3652 3653 ath_start(ifp); 3654 } 3655 3656 /* 3657 * Deferred processing of transmit interrupt. 3658 */ 3659 static void 3660 ath_tx_proc(void *arg, int npending) 3661 { 3662 struct ath_softc *sc = arg; 3663 struct ifnet *ifp = &sc->sc_if; 3664 int i; 3665 3666 /* 3667 * Process each active queue. 3668 */ 3669 /* XXX faster to read ISR_S0_S and ISR_S1_S to determine q's? */ 3670 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 3671 if (ATH_TXQ_SETUP(sc, i)) 3672 ath_tx_processq(sc, &sc->sc_txq[i]); 3673 3674 ifp->if_flags &= ~IFF_OACTIVE; 3675 sc->sc_tx_timer = 0; 3676 3677 if (sc->sc_softled) 3678 ath_led_event(sc, ATH_LED_TX); 3679 3680 ath_start(ifp); 3681 } 3682 3683 static void 3684 ath_tx_draintxq(struct ath_softc *sc, struct ath_txq *txq) 3685 { 3686 struct ath_hal *ah = sc->sc_ah; 3687 struct ieee80211_node *ni; 3688 struct ath_buf *bf; 3689 3690 /* 3691 * NB: this assumes output has been stopped and 3692 * we do not need to block ath_tx_tasklet 3693 */ 3694 for (;;) { 3695 ATH_TXQ_LOCK(txq); 3696 bf = STAILQ_FIRST(&txq->axq_q); 3697 if (bf == NULL) { 3698 txq->axq_link = NULL; 3699 ATH_TXQ_UNLOCK(txq); 3700 break; 3701 } 3702 ATH_TXQ_REMOVE_HEAD(txq, bf_list); 3703 ATH_TXQ_UNLOCK(txq); 3704 #ifdef AR_DEBUG 3705 if (sc->sc_debug & ATH_DEBUG_RESET) 3706 ath_printtxbuf(bf, 3707 ath_hal_txprocdesc(ah, bf->bf_desc) == HAL_OK); 3708 #endif /* AR_DEBUG */ 3709 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 3710 m_freem(bf->bf_m); 3711 bf->bf_m = NULL; 3712 ni = bf->bf_node; 3713 bf->bf_node = NULL; 3714 if (ni != NULL) { 3715 /* 3716 * Reclaim node reference. 3717 */ 3718 ieee80211_free_node(ni); 3719 } 3720 ATH_TXBUF_LOCK(sc); 3721 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 3722 ATH_TXBUF_UNLOCK(sc); 3723 } 3724 } 3725 3726 static void 3727 ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq) 3728 { 3729 struct ath_hal *ah = sc->sc_ah; 3730 3731 (void) ath_hal_stoptxdma(ah, txq->axq_qnum); 3732 DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n", 3733 __func__, txq->axq_qnum, 3734 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, txq->axq_qnum), 3735 txq->axq_link); 3736 } 3737 3738 /* 3739 * Drain the transmit queues and reclaim resources. 3740 */ 3741 static void 3742 ath_draintxq(struct ath_softc *sc) 3743 { 3744 struct ath_hal *ah = sc->sc_ah; 3745 struct ifnet *ifp = &sc->sc_if; 3746 int i; 3747 3748 /* XXX return value */ 3749 if (!sc->sc_invalid) { 3750 /* don't touch the hardware if marked invalid */ 3751 (void) ath_hal_stoptxdma(ah, sc->sc_bhalq); 3752 DPRINTF(sc, ATH_DEBUG_RESET, 3753 "%s: beacon queue %p\n", __func__, 3754 (caddr_t)(uintptr_t) ath_hal_gettxbuf(ah, sc->sc_bhalq)); 3755 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 3756 if (ATH_TXQ_SETUP(sc, i)) 3757 ath_tx_stopdma(sc, &sc->sc_txq[i]); 3758 } 3759 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 3760 if (ATH_TXQ_SETUP(sc, i)) 3761 ath_tx_draintxq(sc, &sc->sc_txq[i]); 3762 ifp->if_flags &= ~IFF_OACTIVE; 3763 sc->sc_tx_timer = 0; 3764 } 3765 3766 /* 3767 * Disable the receive h/w in preparation for a reset. 3768 */ 3769 static void 3770 ath_stoprecv(struct ath_softc *sc) 3771 { 3772 #define PA2DESC(_sc, _pa) \ 3773 ((struct ath_desc *)((caddr_t)(_sc)->sc_rxdma.dd_desc + \ 3774 ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr))) 3775 struct ath_hal *ah = sc->sc_ah; 3776 3777 ath_hal_stoppcurecv(ah); /* disable PCU */ 3778 ath_hal_setrxfilter(ah, 0); /* clear recv filter */ 3779 ath_hal_stopdmarecv(ah); /* disable DMA engine */ 3780 DELAY(3000); /* 3ms is long enough for 1 frame */ 3781 #ifdef AR_DEBUG 3782 if (sc->sc_debug & (ATH_DEBUG_RESET | ATH_DEBUG_FATAL)) { 3783 struct ath_buf *bf; 3784 3785 printf("%s: rx queue %p, link %p\n", __func__, 3786 (caddr_t)(uintptr_t) ath_hal_getrxbuf(ah), sc->sc_rxlink); 3787 STAILQ_FOREACH(bf, &sc->sc_rxbuf, bf_list) { 3788 struct ath_desc *ds = bf->bf_desc; 3789 HAL_STATUS status = ath_hal_rxprocdesc(ah, ds, 3790 bf->bf_daddr, PA2DESC(sc, ds->ds_link)); 3791 if (status == HAL_OK || (sc->sc_debug & ATH_DEBUG_FATAL)) 3792 ath_printrxbuf(bf, status == HAL_OK); 3793 } 3794 } 3795 #endif 3796 sc->sc_rxlink = NULL; /* just in case */ 3797 #undef PA2DESC 3798 } 3799 3800 /* 3801 * Enable the receive h/w following a reset. 3802 */ 3803 static int 3804 ath_startrecv(struct ath_softc *sc) 3805 { 3806 struct ath_hal *ah = sc->sc_ah; 3807 struct ath_buf *bf; 3808 3809 sc->sc_rxlink = NULL; 3810 STAILQ_FOREACH(bf, &sc->sc_rxbuf, bf_list) { 3811 int error = ath_rxbuf_init(sc, bf); 3812 if (error != 0) { 3813 DPRINTF(sc, ATH_DEBUG_RECV, 3814 "%s: ath_rxbuf_init failed %d\n", 3815 __func__, error); 3816 return error; 3817 } 3818 } 3819 3820 bf = STAILQ_FIRST(&sc->sc_rxbuf); 3821 ath_hal_putrxbuf(ah, bf->bf_daddr); 3822 ath_hal_rxena(ah); /* enable recv descriptors */ 3823 ath_mode_init(sc); /* set filters, etc. */ 3824 ath_hal_startpcurecv(ah); /* re-enable PCU/DMA engine */ 3825 return 0; 3826 } 3827 3828 /* 3829 * Update internal state after a channel change. 3830 */ 3831 static void 3832 ath_chan_change(struct ath_softc *sc, struct ieee80211_channel *chan) 3833 { 3834 struct ieee80211com *ic = &sc->sc_ic; 3835 enum ieee80211_phymode mode; 3836 u_int16_t flags; 3837 3838 /* 3839 * Change channels and update the h/w rate map 3840 * if we're switching; e.g. 11a to 11b/g. 3841 */ 3842 mode = ieee80211_chan2mode(ic, chan); 3843 if (mode != sc->sc_curmode) 3844 ath_setcurmode(sc, mode); 3845 /* 3846 * Update BPF state. NB: ethereal et. al. don't handle 3847 * merged flags well so pick a unique mode for their use. 3848 */ 3849 if (IEEE80211_IS_CHAN_A(chan)) 3850 flags = IEEE80211_CHAN_A; 3851 /* XXX 11g schizophrenia */ 3852 else if (IEEE80211_IS_CHAN_G(chan) || 3853 IEEE80211_IS_CHAN_PUREG(chan)) 3854 flags = IEEE80211_CHAN_G; 3855 else 3856 flags = IEEE80211_CHAN_B; 3857 if (IEEE80211_IS_CHAN_T(chan)) 3858 flags |= IEEE80211_CHAN_TURBO; 3859 sc->sc_tx_th.wt_chan_freq = sc->sc_rx_th.wr_chan_freq = 3860 htole16(chan->ic_freq); 3861 sc->sc_tx_th.wt_chan_flags = sc->sc_rx_th.wr_chan_flags = 3862 htole16(flags); 3863 } 3864 3865 /* 3866 * Set/change channels. If the channel is really being changed, 3867 * it's done by reseting the chip. To accomplish this we must 3868 * first cleanup any pending DMA, then restart stuff after a la 3869 * ath_init. 3870 */ 3871 static int 3872 ath_chan_set(struct ath_softc *sc, struct ieee80211_channel *chan) 3873 { 3874 struct ath_hal *ah = sc->sc_ah; 3875 struct ieee80211com *ic = &sc->sc_ic; 3876 HAL_CHANNEL hchan; 3877 3878 /* 3879 * Convert to a HAL channel description with 3880 * the flags constrained to reflect the current 3881 * operating mode. 3882 */ 3883 hchan.channel = chan->ic_freq; 3884 hchan.channelFlags = ath_chan2flags(ic, chan); 3885 3886 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %u (%u MHz) -> %u (%u MHz)\n", 3887 __func__, 3888 ath_hal_mhz2ieee(sc->sc_curchan.channel, 3889 sc->sc_curchan.channelFlags), 3890 sc->sc_curchan.channel, 3891 ath_hal_mhz2ieee(hchan.channel, hchan.channelFlags), hchan.channel); 3892 if (hchan.channel != sc->sc_curchan.channel || 3893 hchan.channelFlags != sc->sc_curchan.channelFlags) { 3894 HAL_STATUS status; 3895 3896 /* 3897 * To switch channels clear any pending DMA operations; 3898 * wait long enough for the RX fifo to drain, reset the 3899 * hardware at the new frequency, and then re-enable 3900 * the relevant bits of the h/w. 3901 */ 3902 ath_hal_intrset(ah, 0); /* disable interrupts */ 3903 ath_draintxq(sc); /* clear pending tx frames */ 3904 ath_stoprecv(sc); /* turn off frame recv */ 3905 if (!ath_hal_reset(ah, ic->ic_opmode, &hchan, AH_TRUE, &status)) { 3906 if_printf(ic->ic_ifp, "ath_chan_set: unable to reset " 3907 "channel %u (%u Mhz)\n", 3908 ieee80211_chan2ieee(ic, chan), chan->ic_freq); 3909 return EIO; 3910 } 3911 sc->sc_curchan = hchan; 3912 ath_update_txpow(sc); /* update tx power state */ 3913 3914 /* 3915 * Re-enable rx framework. 3916 */ 3917 if (ath_startrecv(sc) != 0) { 3918 if_printf(ic->ic_ifp, 3919 "ath_chan_set: unable to restart recv logic\n"); 3920 return EIO; 3921 } 3922 3923 /* 3924 * Change channels and update the h/w rate map 3925 * if we're switching; e.g. 11a to 11b/g. 3926 */ 3927 ic->ic_ibss_chan = chan; 3928 ath_chan_change(sc, chan); 3929 3930 /* 3931 * Re-enable interrupts. 3932 */ 3933 ath_hal_intrset(ah, sc->sc_imask); 3934 } 3935 return 0; 3936 } 3937 3938 static void 3939 ath_next_scan(void *arg) 3940 { 3941 struct ath_softc *sc = arg; 3942 struct ieee80211com *ic = &sc->sc_ic; 3943 3944 if (ic->ic_state == IEEE80211_S_SCAN) 3945 ieee80211_next_scan(ic); 3946 } 3947 3948 /* 3949 * Periodically recalibrate the PHY to account 3950 * for temperature/environment changes. 3951 */ 3952 static void 3953 ath_calibrate(void *arg) 3954 { 3955 struct ath_softc *sc = arg; 3956 struct ath_hal *ah = sc->sc_ah; 3957 3958 sc->sc_stats.ast_per_cal++; 3959 3960 DPRINTF(sc, ATH_DEBUG_CALIBRATE, "%s: channel %u/%x\n", 3961 __func__, sc->sc_curchan.channel, sc->sc_curchan.channelFlags); 3962 3963 if (ath_hal_getrfgain(ah) == HAL_RFGAIN_NEED_CHANGE) { 3964 /* 3965 * Rfgain is out of bounds, reset the chip 3966 * to load new gain values. 3967 */ 3968 sc->sc_stats.ast_per_rfgain++; 3969 ath_reset(&sc->sc_if); 3970 } 3971 if (!ath_hal_calibrate(ah, &sc->sc_curchan)) { 3972 DPRINTF(sc, ATH_DEBUG_ANY, 3973 "%s: calibration of channel %u failed\n", 3974 __func__, sc->sc_curchan.channel); 3975 sc->sc_stats.ast_per_calfail++; 3976 } 3977 callout_reset(&sc->sc_cal_ch, ath_calinterval * hz, ath_calibrate, sc); 3978 } 3979 3980 static int 3981 ath_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 3982 { 3983 struct ifnet *ifp = ic->ic_ifp; 3984 struct ath_softc *sc = ifp->if_softc; 3985 struct ath_hal *ah = sc->sc_ah; 3986 struct ieee80211_node *ni; 3987 int i, error; 3988 const u_int8_t *bssid; 3989 u_int32_t rfilt; 3990 static const HAL_LED_STATE leds[] = { 3991 HAL_LED_INIT, /* IEEE80211_S_INIT */ 3992 HAL_LED_SCAN, /* IEEE80211_S_SCAN */ 3993 HAL_LED_AUTH, /* IEEE80211_S_AUTH */ 3994 HAL_LED_ASSOC, /* IEEE80211_S_ASSOC */ 3995 HAL_LED_RUN, /* IEEE80211_S_RUN */ 3996 }; 3997 3998 DPRINTF(sc, ATH_DEBUG_STATE, "%s: %s -> %s\n", __func__, 3999 ieee80211_state_name[ic->ic_state], 4000 ieee80211_state_name[nstate]); 4001 4002 callout_stop(&sc->sc_scan_ch); 4003 callout_stop(&sc->sc_cal_ch); 4004 ath_hal_setledstate(ah, leds[nstate]); /* set LED */ 4005 4006 if (nstate == IEEE80211_S_INIT) { 4007 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 4008 /* 4009 * NB: disable interrupts so we don't rx frames. 4010 */ 4011 ath_hal_intrset(ah, sc->sc_imask &~ ~HAL_INT_GLOBAL); 4012 /* 4013 * Notify the rate control algorithm. 4014 */ 4015 ath_rate_newstate(sc, nstate); 4016 goto done; 4017 } 4018 ni = ic->ic_bss; 4019 error = ath_chan_set(sc, ni->ni_chan); 4020 if (error != 0) 4021 goto bad; 4022 rfilt = ath_calcrxfilter(sc, nstate); 4023 if (nstate == IEEE80211_S_SCAN) 4024 bssid = ifp->if_broadcastaddr; 4025 else 4026 bssid = ni->ni_bssid; 4027 ath_hal_setrxfilter(ah, rfilt); 4028 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s\n", 4029 __func__, rfilt, ether_sprintf(bssid)); 4030 4031 if (nstate == IEEE80211_S_RUN && ic->ic_opmode == IEEE80211_M_STA) 4032 ath_hal_setassocid(ah, bssid, ni->ni_associd); 4033 else 4034 ath_hal_setassocid(ah, bssid, 0); 4035 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 4036 for (i = 0; i < IEEE80211_WEP_NKID; i++) 4037 if (ath_hal_keyisvalid(ah, i)) 4038 ath_hal_keysetmac(ah, i, bssid); 4039 } 4040 4041 /* 4042 * Notify the rate control algorithm so rates 4043 * are setup should ath_beacon_alloc be called. 4044 */ 4045 ath_rate_newstate(sc, nstate); 4046 4047 if (ic->ic_opmode == IEEE80211_M_MONITOR) { 4048 /* nothing to do */; 4049 } else if (nstate == IEEE80211_S_RUN) { 4050 DPRINTF(sc, ATH_DEBUG_STATE, 4051 "%s(RUN): ic_flags=0x%08x iv=%d bssid=%s " 4052 "capinfo=0x%04x chan=%d\n" 4053 , __func__ 4054 , ic->ic_flags 4055 , ni->ni_intval 4056 , ether_sprintf(ni->ni_bssid) 4057 , ni->ni_capinfo 4058 , ieee80211_chan2ieee(ic, ni->ni_chan)); 4059 4060 /* 4061 * Allocate and setup the beacon frame for AP or adhoc mode. 4062 */ 4063 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 4064 ic->ic_opmode == IEEE80211_M_IBSS) { 4065 /* 4066 * Stop any previous beacon DMA. This may be 4067 * necessary, for example, when an ibss merge 4068 * causes reconfiguration; there will be a state 4069 * transition from RUN->RUN that means we may 4070 * be called with beacon transmission active. 4071 */ 4072 ath_hal_stoptxdma(ah, sc->sc_bhalq); 4073 ath_beacon_free(sc); 4074 error = ath_beacon_alloc(sc, ni); 4075 if (error != 0) 4076 goto bad; 4077 } 4078 4079 /* 4080 * Configure the beacon and sleep timers. 4081 */ 4082 ath_beacon_config(sc); 4083 } else { 4084 ath_hal_intrset(ah, 4085 sc->sc_imask &~ (HAL_INT_SWBA | HAL_INT_BMISS)); 4086 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 4087 } 4088 done: 4089 /* 4090 * Invoke the parent method to complete the work. 4091 */ 4092 error = sc->sc_newstate(ic, nstate, arg); 4093 /* 4094 * Finally, start any timers. 4095 */ 4096 if (nstate == IEEE80211_S_RUN) { 4097 /* start periodic recalibration timer */ 4098 callout_reset(&sc->sc_cal_ch, ath_calinterval * hz, 4099 ath_calibrate, sc); 4100 } else if (nstate == IEEE80211_S_SCAN) { 4101 /* start ap/neighbor scan timer */ 4102 callout_reset(&sc->sc_scan_ch, (ath_dwelltime * hz) / 1000, 4103 ath_next_scan, sc); 4104 } 4105 bad: 4106 return error; 4107 } 4108 4109 /* 4110 * Setup driver-specific state for a newly associated node. 4111 * Note that we're called also on a re-associate, the isnew 4112 * param tells us if this is the first time or not. 4113 */ 4114 static void 4115 ath_newassoc(struct ieee80211com *ic, struct ieee80211_node *ni, int isnew) 4116 { 4117 struct ath_softc *sc = ic->ic_ifp->if_softc; 4118 4119 ath_rate_newassoc(sc, ATH_NODE(ni), isnew); 4120 } 4121 4122 static int 4123 ath_getchannels(struct ath_softc *sc, u_int cc, 4124 HAL_BOOL outdoor, HAL_BOOL xchanmode) 4125 { 4126 struct ieee80211com *ic = &sc->sc_ic; 4127 struct ifnet *ifp = &sc->sc_if; 4128 struct ath_hal *ah = sc->sc_ah; 4129 HAL_CHANNEL *chans; 4130 int i, ix, nchan; 4131 4132 chans = malloc(IEEE80211_CHAN_MAX * sizeof(HAL_CHANNEL), 4133 M_TEMP, M_NOWAIT); 4134 if (chans == NULL) { 4135 if_printf(ifp, "unable to allocate channel table\n"); 4136 return ENOMEM; 4137 } 4138 if (!ath_hal_init_channels(ah, chans, IEEE80211_CHAN_MAX, &nchan, 4139 cc, HAL_MODE_ALL, outdoor, xchanmode)) { 4140 u_int32_t rd; 4141 4142 ath_hal_getregdomain(ah, &rd); 4143 if_printf(ifp, "unable to collect channel list from hal; " 4144 "regdomain likely %u country code %u\n", rd, cc); 4145 free(chans, M_TEMP); 4146 return EINVAL; 4147 } 4148 4149 /* 4150 * Convert HAL channels to ieee80211 ones and insert 4151 * them in the table according to their channel number. 4152 */ 4153 for (i = 0; i < nchan; i++) { 4154 HAL_CHANNEL *c = &chans[i]; 4155 ix = ath_hal_mhz2ieee(c->channel, c->channelFlags); 4156 if (ix > IEEE80211_CHAN_MAX) { 4157 if_printf(ifp, "bad hal channel %u (%u/%x) ignored\n", 4158 ix, c->channel, c->channelFlags); 4159 continue; 4160 } 4161 /* NB: flags are known to be compatible */ 4162 if (ic->ic_channels[ix].ic_freq == 0) { 4163 ic->ic_channels[ix].ic_freq = c->channel; 4164 ic->ic_channels[ix].ic_flags = c->channelFlags; 4165 } else { 4166 /* channels overlap; e.g. 11g and 11b */ 4167 ic->ic_channels[ix].ic_flags |= c->channelFlags; 4168 } 4169 } 4170 free(chans, M_TEMP); 4171 return 0; 4172 } 4173 4174 static void 4175 ath_led_done(void *arg) 4176 { 4177 struct ath_softc *sc = arg; 4178 4179 sc->sc_blinking = 0; 4180 } 4181 4182 /* 4183 * Turn the LED off: flip the pin and then set a timer so no 4184 * update will happen for the specified duration. 4185 */ 4186 static void 4187 ath_led_off(void *arg) 4188 { 4189 struct ath_softc *sc = arg; 4190 4191 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, !sc->sc_ledon); 4192 callout_reset(&sc->sc_ledtimer, sc->sc_ledoff, ath_led_done, sc); 4193 } 4194 4195 /* 4196 * Blink the LED according to the specified on/off times. 4197 */ 4198 static void 4199 ath_led_blink(struct ath_softc *sc, int on, int off) 4200 { 4201 DPRINTF(sc, ATH_DEBUG_LED, "%s: on %u off %u\n", __func__, on, off); 4202 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, sc->sc_ledon); 4203 sc->sc_blinking = 1; 4204 sc->sc_ledoff = off; 4205 callout_reset(&sc->sc_ledtimer, on, ath_led_off, sc); 4206 } 4207 4208 static void 4209 ath_led_event(struct ath_softc *sc, int event) 4210 { 4211 4212 sc->sc_ledevent = ticks; /* time of last event */ 4213 if (sc->sc_blinking) /* don't interrupt active blink */ 4214 return; 4215 switch (event) { 4216 case ATH_LED_POLL: 4217 ath_led_blink(sc, sc->sc_hwmap[0].ledon, 4218 sc->sc_hwmap[0].ledoff); 4219 break; 4220 case ATH_LED_TX: 4221 ath_led_blink(sc, sc->sc_hwmap[sc->sc_txrate].ledon, 4222 sc->sc_hwmap[sc->sc_txrate].ledoff); 4223 break; 4224 case ATH_LED_RX: 4225 ath_led_blink(sc, sc->sc_hwmap[sc->sc_rxrate].ledon, 4226 sc->sc_hwmap[sc->sc_rxrate].ledoff); 4227 break; 4228 } 4229 } 4230 4231 static void 4232 ath_update_txpow(struct ath_softc *sc) 4233 { 4234 struct ieee80211com *ic = &sc->sc_ic; 4235 struct ath_hal *ah = sc->sc_ah; 4236 u_int32_t txpow; 4237 4238 if (sc->sc_curtxpow != ic->ic_txpowlimit) { 4239 ath_hal_settxpowlimit(ah, ic->ic_txpowlimit); 4240 /* read back in case value is clamped */ 4241 ath_hal_gettxpowlimit(ah, &txpow); 4242 ic->ic_txpowlimit = sc->sc_curtxpow = txpow; 4243 } 4244 /* 4245 * Fetch max tx power level for status requests. 4246 */ 4247 ath_hal_getmaxtxpow(sc->sc_ah, &txpow); 4248 ic->ic_bss->ni_txpower = txpow; 4249 } 4250 4251 static int 4252 ath_rate_setup(struct ath_softc *sc, u_int mode) 4253 { 4254 struct ath_hal *ah = sc->sc_ah; 4255 struct ieee80211com *ic = &sc->sc_ic; 4256 const HAL_RATE_TABLE *rt; 4257 struct ieee80211_rateset *rs; 4258 int i, maxrates; 4259 4260 switch (mode) { 4261 case IEEE80211_MODE_11A: 4262 sc->sc_rates[mode] = ath_hal_getratetable(ah, HAL_MODE_11A); 4263 break; 4264 case IEEE80211_MODE_11B: 4265 sc->sc_rates[mode] = ath_hal_getratetable(ah, HAL_MODE_11B); 4266 break; 4267 case IEEE80211_MODE_11G: 4268 sc->sc_rates[mode] = ath_hal_getratetable(ah, HAL_MODE_11G); 4269 break; 4270 case IEEE80211_MODE_TURBO_A: 4271 sc->sc_rates[mode] = ath_hal_getratetable(ah, HAL_MODE_TURBO); 4272 break; 4273 case IEEE80211_MODE_TURBO_G: 4274 sc->sc_rates[mode] = ath_hal_getratetable(ah, HAL_MODE_108G); 4275 break; 4276 default: 4277 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid mode %u\n", 4278 __func__, mode); 4279 return 0; 4280 } 4281 rt = sc->sc_rates[mode]; 4282 if (rt == NULL) 4283 return 0; 4284 if (rt->rateCount > IEEE80211_RATE_MAXSIZE) { 4285 DPRINTF(sc, ATH_DEBUG_ANY, 4286 "%s: rate table too small (%u > %u)\n", 4287 __func__, rt->rateCount, IEEE80211_RATE_MAXSIZE); 4288 maxrates = IEEE80211_RATE_MAXSIZE; 4289 } else 4290 maxrates = rt->rateCount; 4291 rs = &ic->ic_sup_rates[mode]; 4292 for (i = 0; i < maxrates; i++) 4293 rs->rs_rates[i] = rt->info[i].dot11Rate; 4294 rs->rs_nrates = maxrates; 4295 return 1; 4296 } 4297 4298 static void 4299 ath_setcurmode(struct ath_softc *sc, enum ieee80211_phymode mode) 4300 { 4301 #define N(a) (sizeof(a)/sizeof(a[0])) 4302 /* NB: on/off times from the Atheros NDIS driver, w/ permission */ 4303 static const struct { 4304 u_int rate; /* tx/rx 802.11 rate */ 4305 u_int16_t timeOn; /* LED on time (ms) */ 4306 u_int16_t timeOff; /* LED off time (ms) */ 4307 } blinkrates[] = { 4308 { 108, 40, 10 }, 4309 { 96, 44, 11 }, 4310 { 72, 50, 13 }, 4311 { 48, 57, 14 }, 4312 { 36, 67, 16 }, 4313 { 24, 80, 20 }, 4314 { 22, 100, 25 }, 4315 { 18, 133, 34 }, 4316 { 12, 160, 40 }, 4317 { 10, 200, 50 }, 4318 { 6, 240, 58 }, 4319 { 4, 267, 66 }, 4320 { 2, 400, 100 }, 4321 { 0, 500, 130 }, 4322 }; 4323 const HAL_RATE_TABLE *rt; 4324 int i, j; 4325 4326 memset(sc->sc_rixmap, 0xff, sizeof(sc->sc_rixmap)); 4327 rt = sc->sc_rates[mode]; 4328 KASSERT(rt != NULL, ("no h/w rate set for phy mode %u", mode)); 4329 for (i = 0; i < rt->rateCount; i++) 4330 sc->sc_rixmap[rt->info[i].dot11Rate & IEEE80211_RATE_VAL] = i; 4331 memset(sc->sc_hwmap, 0, sizeof(sc->sc_hwmap)); 4332 for (i = 0; i < 32; i++) { 4333 u_int8_t ix = rt->rateCodeToIndex[i]; 4334 if (ix == 0xff) { 4335 sc->sc_hwmap[i].ledon = (500 * hz) / 1000; 4336 sc->sc_hwmap[i].ledoff = (130 * hz) / 1000; 4337 continue; 4338 } 4339 sc->sc_hwmap[i].ieeerate = 4340 rt->info[ix].dot11Rate & IEEE80211_RATE_VAL; 4341 sc->sc_hwmap[i].txflags = IEEE80211_RADIOTAP_F_DATAPAD; 4342 if (rt->info[ix].shortPreamble || 4343 rt->info[ix].phy == IEEE80211_T_OFDM) 4344 sc->sc_hwmap[i].txflags |= IEEE80211_RADIOTAP_F_SHORTPRE; 4345 /* NB: receive frames include FCS */ 4346 sc->sc_hwmap[i].rxflags = sc->sc_hwmap[i].txflags | 4347 IEEE80211_RADIOTAP_F_FCS; 4348 /* setup blink rate table to avoid per-packet lookup */ 4349 for (j = 0; j < N(blinkrates)-1; j++) 4350 if (blinkrates[j].rate == sc->sc_hwmap[i].ieeerate) 4351 break; 4352 /* NB: this uses the last entry if the rate isn't found */ 4353 /* XXX beware of overlow */ 4354 sc->sc_hwmap[i].ledon = (blinkrates[j].timeOn * hz) / 1000; 4355 sc->sc_hwmap[i].ledoff = (blinkrates[j].timeOff * hz) / 1000; 4356 } 4357 sc->sc_currates = rt; 4358 sc->sc_curmode = mode; 4359 /* 4360 * All protection frames are transmited at 2Mb/s for 4361 * 11g, otherwise at 1Mb/s. 4362 * XXX select protection rate index from rate table. 4363 */ 4364 sc->sc_protrix = (mode == IEEE80211_MODE_11G ? 1 : 0); 4365 /* NB: caller is responsible for reseting rate control state */ 4366 #undef N 4367 } 4368 4369 #ifdef AR_DEBUG 4370 static void 4371 ath_printrxbuf(struct ath_buf *bf, int done) 4372 { 4373 struct ath_desc *ds; 4374 int i; 4375 4376 for (i = 0, ds = bf->bf_desc; i < bf->bf_nseg; i++, ds++) { 4377 printf("R%d (%p %p) %08x %08x %08x %08x %08x %08x %c\n", 4378 i, ds, (struct ath_desc *)bf->bf_daddr + i, 4379 ds->ds_link, ds->ds_data, 4380 ds->ds_ctl0, ds->ds_ctl1, 4381 ds->ds_hw[0], ds->ds_hw[1], 4382 !done ? ' ' : (ds->ds_rxstat.rs_status == 0) ? '*' : '!'); 4383 } 4384 } 4385 4386 static void 4387 ath_printtxbuf(struct ath_buf *bf, int done) 4388 { 4389 struct ath_desc *ds; 4390 int i; 4391 4392 for (i = 0, ds = bf->bf_desc; i < bf->bf_nseg; i++, ds++) { 4393 printf("T%d (%p %p) %08x %08x %08x %08x %08x %08x %08x %08x %c\n", 4394 i, ds, (struct ath_desc *)bf->bf_daddr + i, 4395 ds->ds_link, ds->ds_data, 4396 ds->ds_ctl0, ds->ds_ctl1, 4397 ds->ds_hw[0], ds->ds_hw[1], ds->ds_hw[2], ds->ds_hw[3], 4398 !done ? ' ' : (ds->ds_txstat.ts_status == 0) ? '*' : '!'); 4399 } 4400 } 4401 #endif /* AR_DEBUG */ 4402 4403 static void 4404 ath_watchdog(struct ifnet *ifp) 4405 { 4406 struct ath_softc *sc = ifp->if_softc; 4407 struct ieee80211com *ic = &sc->sc_ic; 4408 4409 ifp->if_timer = 0; 4410 if ((ifp->if_flags & IFF_RUNNING) == 0 || sc->sc_invalid) 4411 return; 4412 if (sc->sc_tx_timer) { 4413 if (--sc->sc_tx_timer == 0) { 4414 if_printf(ifp, "device timeout\n"); 4415 ath_reset(ifp); 4416 ifp->if_oerrors++; 4417 sc->sc_stats.ast_watchdog++; 4418 } else 4419 ifp->if_timer = 1; 4420 } 4421 ieee80211_watchdog(ic); 4422 } 4423 4424 /* 4425 * Diagnostic interface to the HAL. This is used by various 4426 * tools to do things like retrieve register contents for 4427 * debugging. The mechanism is intentionally opaque so that 4428 * it can change frequently w/o concern for compatiblity. 4429 */ 4430 static int 4431 ath_ioctl_diag(struct ath_softc *sc, struct ath_diag *ad) 4432 { 4433 struct ath_hal *ah = sc->sc_ah; 4434 u_int id = ad->ad_id & ATH_DIAG_ID; 4435 void *indata = NULL; 4436 void *outdata = NULL; 4437 u_int32_t insize = ad->ad_in_size; 4438 u_int32_t outsize = ad->ad_out_size; 4439 int error = 0; 4440 4441 if (ad->ad_id & ATH_DIAG_IN) { 4442 /* 4443 * Copy in data. 4444 */ 4445 indata = malloc(insize, M_TEMP, M_NOWAIT); 4446 if (indata == NULL) { 4447 error = ENOMEM; 4448 goto bad; 4449 } 4450 error = copyin(ad->ad_in_data, indata, insize); 4451 if (error) 4452 goto bad; 4453 } 4454 if (ad->ad_id & ATH_DIAG_DYN) { 4455 /* 4456 * Allocate a buffer for the results (otherwise the HAL 4457 * returns a pointer to a buffer where we can read the 4458 * results). Note that we depend on the HAL leaving this 4459 * pointer for us to use below in reclaiming the buffer; 4460 * may want to be more defensive. 4461 */ 4462 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 4463 if (outdata == NULL) { 4464 error = ENOMEM; 4465 goto bad; 4466 } 4467 } 4468 if (ath_hal_getdiagstate(ah, id, indata, insize, &outdata, &outsize)) { 4469 if (outsize < ad->ad_out_size) 4470 ad->ad_out_size = outsize; 4471 if (outdata != NULL) 4472 error = copyout(outdata, ad->ad_out_data, 4473 ad->ad_out_size); 4474 } else { 4475 error = EINVAL; 4476 } 4477 bad: 4478 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 4479 free(indata, M_TEMP); 4480 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 4481 free(outdata, M_TEMP); 4482 return error; 4483 } 4484 4485 static int 4486 ath_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 4487 { 4488 #define IS_RUNNING(ifp) \ 4489 ((ifp->if_flags & (IFF_RUNNING|IFF_UP)) == (IFF_RUNNING|IFF_UP)) 4490 struct ath_softc *sc = ifp->if_softc; 4491 struct ieee80211com *ic = &sc->sc_ic; 4492 struct ifreq *ifr = (struct ifreq *)data; 4493 int error = 0; 4494 4495 ATH_LOCK(sc); 4496 switch (cmd) { 4497 case SIOCSIFFLAGS: 4498 if (IS_RUNNING(ifp)) { 4499 /* 4500 * To avoid rescanning another access point, 4501 * do not call ath_init() here. Instead, 4502 * only reflect promisc mode settings. 4503 */ 4504 ath_mode_init(sc); 4505 } else if (ifp->if_flags & IFF_UP) { 4506 /* 4507 * Beware of being called during attach/detach 4508 * to reset promiscuous mode. In that case we 4509 * will still be marked UP but not RUNNING. 4510 * However trying to re-init the interface 4511 * is the wrong thing to do as we've already 4512 * torn down much of our state. There's 4513 * probably a better way to deal with this. 4514 */ 4515 if (!sc->sc_invalid && ic->ic_bss != NULL) 4516 ath_init(ifp); /* XXX lose error */ 4517 } else 4518 ath_stop_locked(ifp); 4519 break; 4520 case SIOCADDMULTI: 4521 case SIOCDELMULTI: 4522 /* 4523 * The upper layer has already installed/removed 4524 * the multicast address(es), just recalculate the 4525 * multicast filter for the card. 4526 */ 4527 if (ifp->if_flags & IFF_RUNNING) 4528 ath_mode_init(sc); 4529 break; 4530 case SIOCGATHSTATS: 4531 /* NB: embed these numbers to get a consistent view */ 4532 sc->sc_stats.ast_tx_packets = ifp->if_opackets; 4533 sc->sc_stats.ast_rx_packets = ifp->if_ipackets; 4534 sc->sc_stats.ast_rx_rssi = ieee80211_getrssi(ic); 4535 ATH_UNLOCK(sc); 4536 /* 4537 * NB: Drop the softc lock in case of a page fault; 4538 * we'll accept any potential inconsisentcy in the 4539 * statistics. The alternative is to copy the data 4540 * to a local structure. 4541 */ 4542 return copyout(&sc->sc_stats, 4543 ifr->ifr_data, sizeof (sc->sc_stats)); 4544 case SIOCGATHDIAG: 4545 error = ath_ioctl_diag(sc, (struct ath_diag *) ifr); 4546 break; 4547 default: 4548 error = ieee80211_ioctl(ic, cmd, data); 4549 if (error == ENETRESET) { 4550 if (IS_RUNNING(ifp) && 4551 ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 4552 ath_init(ifp); /* XXX lose error */ 4553 error = 0; 4554 } 4555 if (error == ERESTART) 4556 error = IS_RUNNING(ifp) ? ath_reset(ifp) : 0; 4557 break; 4558 } 4559 ATH_UNLOCK(sc); 4560 return error; 4561 #undef IS_RUNNING 4562 } 4563 4564 static int 4565 ath_sysctl_slottime(SYSCTL_HANDLER_ARGS) 4566 { 4567 struct ath_softc *sc = arg1; 4568 u_int slottime = ath_hal_getslottime(sc->sc_ah); 4569 int error; 4570 4571 error = sysctl_handle_int(oidp, &slottime, 0, req); 4572 if (error || !req->newptr) 4573 return error; 4574 return !ath_hal_setslottime(sc->sc_ah, slottime) ? EINVAL : 0; 4575 } 4576 4577 static int 4578 ath_sysctl_acktimeout(SYSCTL_HANDLER_ARGS) 4579 { 4580 struct ath_softc *sc = arg1; 4581 u_int acktimeout = ath_hal_getacktimeout(sc->sc_ah); 4582 int error; 4583 4584 error = sysctl_handle_int(oidp, &acktimeout, 0, req); 4585 if (error || !req->newptr) 4586 return error; 4587 return !ath_hal_setacktimeout(sc->sc_ah, acktimeout) ? EINVAL : 0; 4588 } 4589 4590 static int 4591 ath_sysctl_ctstimeout(SYSCTL_HANDLER_ARGS) 4592 { 4593 struct ath_softc *sc = arg1; 4594 u_int ctstimeout = ath_hal_getctstimeout(sc->sc_ah); 4595 int error; 4596 4597 error = sysctl_handle_int(oidp, &ctstimeout, 0, req); 4598 if (error || !req->newptr) 4599 return error; 4600 return !ath_hal_setctstimeout(sc->sc_ah, ctstimeout) ? EINVAL : 0; 4601 } 4602 4603 static int 4604 ath_sysctl_softled(SYSCTL_HANDLER_ARGS) 4605 { 4606 struct ath_softc *sc = arg1; 4607 int softled = sc->sc_softled; 4608 int error; 4609 4610 error = sysctl_handle_int(oidp, &softled, 0, req); 4611 if (error || !req->newptr) 4612 return error; 4613 softled = (softled != 0); 4614 if (softled != sc->sc_softled) { 4615 if (softled) { 4616 /* NB: handle any sc_ledpin change */ 4617 ath_hal_gpioCfgOutput(sc->sc_ah, sc->sc_ledpin); 4618 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, 4619 !sc->sc_ledon); 4620 } 4621 sc->sc_softled = softled; 4622 } 4623 return 0; 4624 } 4625 4626 static int 4627 ath_sysctl_rxantenna(SYSCTL_HANDLER_ARGS) 4628 { 4629 struct ath_softc *sc = arg1; 4630 u_int defantenna = ath_hal_getdefantenna(sc->sc_ah); 4631 int error; 4632 4633 error = sysctl_handle_int(oidp, &defantenna, 0, req); 4634 if (!error && req->newptr) 4635 ath_hal_setdefantenna(sc->sc_ah, defantenna); 4636 return error; 4637 } 4638 4639 static int 4640 ath_sysctl_diversity(SYSCTL_HANDLER_ARGS) 4641 { 4642 struct ath_softc *sc = arg1; 4643 u_int diversity = sc->sc_diversity; 4644 int error; 4645 4646 error = sysctl_handle_int(oidp, &diversity, 0, req); 4647 if (error || !req->newptr) 4648 return error; 4649 sc->sc_diversity = diversity; 4650 return !ath_hal_setdiversity(sc->sc_ah, diversity) ? EINVAL : 0; 4651 } 4652 4653 static int 4654 ath_sysctl_diag(SYSCTL_HANDLER_ARGS) 4655 { 4656 struct ath_softc *sc = arg1; 4657 u_int32_t diag; 4658 int error; 4659 4660 if (!ath_hal_getdiag(sc->sc_ah, &diag)) 4661 return EINVAL; 4662 error = sysctl_handle_int(oidp, &diag, 0, req); 4663 if (error || !req->newptr) 4664 return error; 4665 return !ath_hal_setdiag(sc->sc_ah, diag) ? EINVAL : 0; 4666 } 4667 4668 static int 4669 ath_sysctl_tpscale(SYSCTL_HANDLER_ARGS) 4670 { 4671 struct ath_softc *sc = arg1; 4672 struct ifnet *ifp = &sc->sc_if; 4673 u_int32_t scale; 4674 int error; 4675 4676 ath_hal_gettpscale(sc->sc_ah, &scale); 4677 error = sysctl_handle_int(oidp, &scale, 0, req); 4678 if (error || !req->newptr) 4679 return error; 4680 return !ath_hal_settpscale(sc->sc_ah, scale) ? EINVAL : ath_reset(ifp); 4681 } 4682 4683 static int 4684 ath_sysctl_tpc(SYSCTL_HANDLER_ARGS) 4685 { 4686 struct ath_softc *sc = arg1; 4687 u_int tpc = ath_hal_gettpc(sc->sc_ah); 4688 int error; 4689 4690 error = sysctl_handle_int(oidp, &tpc, 0, req); 4691 if (error || !req->newptr) 4692 return error; 4693 return !ath_hal_settpc(sc->sc_ah, tpc) ? EINVAL : 0; 4694 } 4695 4696 static void 4697 ath_sysctlattach(struct ath_softc *sc) 4698 { 4699 struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->sc_dev); 4700 struct sysctl_oid *tree = device_get_sysctl_tree(sc->sc_dev); 4701 4702 ath_hal_getcountrycode(sc->sc_ah, &sc->sc_countrycode); 4703 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4704 "countrycode", CTLFLAG_RD, &sc->sc_countrycode, 0, 4705 "EEPROM country code"); 4706 ath_hal_getregdomain(sc->sc_ah, &sc->sc_regdomain); 4707 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4708 "regdomain", CTLFLAG_RD, &sc->sc_regdomain, 0, 4709 "EEPROM regdomain code"); 4710 sc->sc_debug = ath_debug; 4711 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4712 "debug", CTLFLAG_RW, &sc->sc_debug, 0, 4713 "control debugging printfs"); 4714 4715 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4716 "slottime", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 4717 ath_sysctl_slottime, "I", "802.11 slot time (us)"); 4718 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4719 "acktimeout", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 4720 ath_sysctl_acktimeout, "I", "802.11 ACK timeout (us)"); 4721 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4722 "ctstimeout", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 4723 ath_sysctl_ctstimeout, "I", "802.11 CTS timeout (us)"); 4724 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4725 "softled", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 4726 ath_sysctl_softled, "I", "enable/disable software LED support"); 4727 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4728 "ledpin", CTLFLAG_RW, &sc->sc_ledpin, 0, 4729 "GPIO pin connected to LED"); 4730 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4731 "ledon", CTLFLAG_RW, &sc->sc_ledon, 0, 4732 "setting to turn LED on"); 4733 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4734 "ledidle", CTLFLAG_RW, &sc->sc_ledidle, 0, 4735 "idle time for inactivity LED (ticks)"); 4736 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4737 "txantenna", CTLFLAG_RW, &sc->sc_txantenna, 0, 4738 "tx antenna (0=auto)"); 4739 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4740 "rxantenna", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 4741 ath_sysctl_rxantenna, "I", "default/rx antenna"); 4742 if (sc->sc_hasdiversity) 4743 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4744 "diversity", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 4745 ath_sysctl_diversity, "I", "antenna diversity"); 4746 sc->sc_txintrperiod = ATH_TXINTR_PERIOD; 4747 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4748 "txintrperiod", CTLFLAG_RW, &sc->sc_txintrperiod, 0, 4749 "tx descriptor batching"); 4750 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4751 "diag", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 4752 ath_sysctl_diag, "I", "h/w diagnostic control"); 4753 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4754 "tpscale", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 4755 ath_sysctl_tpscale, "I", "tx power scaling"); 4756 if (sc->sc_hastpc) 4757 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 4758 "tpc", CTLTYPE_INT | CTLFLAG_RW, sc, 0, 4759 ath_sysctl_tpc, "I", "enable/disable per-packet TPC"); 4760 } 4761 4762 static void 4763 ath_bpfattach(struct ath_softc *sc) 4764 { 4765 struct ifnet *ifp = &sc->sc_if; 4766 4767 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 4768 sizeof(struct ieee80211_frame) + sizeof(sc->sc_tx_th), 4769 &sc->sc_drvbpf); 4770 /* 4771 * Initialize constant fields. 4772 * XXX make header lengths a multiple of 32-bits so subsequent 4773 * headers are properly aligned; this is a kludge to keep 4774 * certain applications happy. 4775 * 4776 * NB: the channel is setup each time we transition to the 4777 * RUN state to avoid filling it in for each frame. 4778 */ 4779 sc->sc_tx_th_len = roundup(sizeof(sc->sc_tx_th), sizeof(u_int32_t)); 4780 sc->sc_tx_th.wt_ihdr.it_len = htole16(sc->sc_tx_th_len); 4781 sc->sc_tx_th.wt_ihdr.it_present = htole32(ATH_TX_RADIOTAP_PRESENT); 4782 4783 sc->sc_rx_th_len = roundup(sizeof(sc->sc_rx_th), sizeof(u_int32_t)); 4784 sc->sc_rx_th.wr_ihdr.it_len = htole16(sc->sc_rx_th_len); 4785 sc->sc_rx_th.wr_ihdr.it_present = htole32(ATH_RX_RADIOTAP_PRESENT); 4786 } 4787 4788 /* 4789 * Announce various information on device/driver attach. 4790 */ 4791 static void 4792 ath_announce(struct ath_softc *sc) 4793 { 4794 #define HAL_MODE_DUALBAND (HAL_MODE_11A|HAL_MODE_11B) 4795 struct ifnet *ifp = &sc->sc_if; 4796 struct ath_hal *ah = sc->sc_ah; 4797 u_int modes, cc; 4798 4799 if_printf(ifp, "mac %d.%d phy %d.%d", 4800 ah->ah_macVersion, ah->ah_macRev, 4801 ah->ah_phyRev >> 4, ah->ah_phyRev & 0xf); 4802 /* 4803 * Print radio revision(s). We check the wireless modes 4804 * to avoid falsely printing revs for inoperable parts. 4805 * Dual-band radio revs are returned in the 5Ghz rev number. 4806 */ 4807 ath_hal_getcountrycode(ah, &cc); 4808 modes = ath_hal_getwirelessmodes(ah, cc); 4809 if ((modes & HAL_MODE_DUALBAND) == HAL_MODE_DUALBAND) { 4810 if (ah->ah_analog5GhzRev && ah->ah_analog2GhzRev) 4811 printf(" 5ghz radio %d.%d 2ghz radio %d.%d", 4812 ah->ah_analog5GhzRev >> 4, 4813 ah->ah_analog5GhzRev & 0xf, 4814 ah->ah_analog2GhzRev >> 4, 4815 ah->ah_analog2GhzRev & 0xf); 4816 else 4817 printf(" radio %d.%d", ah->ah_analog5GhzRev >> 4, 4818 ah->ah_analog5GhzRev & 0xf); 4819 } else 4820 printf(" radio %d.%d", ah->ah_analog5GhzRev >> 4, 4821 ah->ah_analog5GhzRev & 0xf); 4822 printf("\n"); 4823 if (bootverbose) { 4824 int i; 4825 for (i = 0; i <= WME_AC_VO; i++) { 4826 struct ath_txq *txq = sc->sc_ac2q[i]; 4827 if_printf(ifp, "Use hw queue %u for %s traffic\n", 4828 txq->axq_qnum, ieee80211_wme_acnames[i]); 4829 } 4830 if_printf(ifp, "Use hw queue %u for CAB traffic\n", 4831 sc->sc_cabq->axq_qnum); 4832 if_printf(ifp, "Use hw queue %u for beacons\n", sc->sc_bhalq); 4833 } 4834 #undef HAL_MODE_DUALBAND 4835 } 4836