ath.c revision 1.127
1 /* $NetBSD: ath.c,v 1.127 2019/05/28 07:41:48 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 15 * redistribution must be conditioned upon including a substantially 16 * similar Disclaimer requirement for further binary redistribution. 17 * 3. Neither the names of the above-listed copyright holders nor the names 18 * of any contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * Alternatively, this software may be distributed under the terms of the 22 * GNU General Public License ("GPL") version 2 as published by the Free 23 * Software Foundation. 24 * 25 * NO WARRANTY 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 28 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 29 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 30 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 31 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 34 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 36 * THE POSSIBILITY OF SUCH DAMAGES. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifdef __FreeBSD__ 41 __FBSDID("$FreeBSD: src/sys/dev/ath/if_ath.c,v 1.104 2005/09/16 10:09:23 ru Exp $"); 42 #endif 43 #ifdef __NetBSD__ 44 __KERNEL_RCSID(0, "$NetBSD: ath.c,v 1.127 2019/05/28 07:41:48 msaitoh Exp $"); 45 #endif 46 47 /* 48 * Driver for the Atheros Wireless LAN controller. 49 * 50 * This software is derived from work of Atsushi Onoe; his contribution 51 * is greatly appreciated. 52 */ 53 54 #ifdef _KERNEL_OPT 55 #include "opt_inet.h" 56 #endif 57 58 #include <sys/param.h> 59 #include <sys/reboot.h> 60 #include <sys/systm.h> 61 #include <sys/types.h> 62 #include <sys/sysctl.h> 63 #include <sys/mbuf.h> 64 #include <sys/malloc.h> 65 #include <sys/kernel.h> 66 #include <sys/socket.h> 67 #include <sys/sockio.h> 68 #include <sys/errno.h> 69 #include <sys/callout.h> 70 #include <sys/bus.h> 71 #include <sys/endian.h> 72 73 #include <net/if.h> 74 #include <net/if_dl.h> 75 #include <net/if_media.h> 76 #include <net/if_types.h> 77 #include <net/if_arp.h> 78 #include <net/if_ether.h> 79 #include <net/if_llc.h> 80 81 #include <net80211/ieee80211_netbsd.h> 82 #include <net80211/ieee80211_var.h> 83 84 #include <net/bpf.h> 85 86 #ifdef INET 87 #include <netinet/in.h> 88 #endif 89 90 #include <sys/device.h> 91 #include <dev/ic/ath_netbsd.h> 92 93 #define AR_DEBUG 94 #include <dev/ic/athvar.h> 95 #include "ah_desc.h" 96 #include "ah_devid.h" /* XXX for softled */ 97 #include "opt_ah.h" 98 99 #ifdef ATH_TX99_DIAG 100 #include <dev/ath/ath_tx99/ath_tx99.h> 101 #endif 102 103 /* unaligned little endian access */ 104 #define LE_READ_2(p) \ 105 ((u_int16_t) \ 106 ((((u_int8_t *)(p))[0] ) | (((u_int8_t *)(p))[1] << 8))) 107 #define LE_READ_4(p) \ 108 ((u_int32_t) \ 109 ((((u_int8_t *)(p))[0] ) | (((u_int8_t *)(p))[1] << 8) | \ 110 (((u_int8_t *)(p))[2] << 16) | (((u_int8_t *)(p))[3] << 24))) 111 112 enum { 113 ATH_LED_TX, 114 ATH_LED_RX, 115 ATH_LED_POLL, 116 }; 117 118 #ifdef AH_NEED_DESC_SWAP 119 #define HTOAH32(x) htole32(x) 120 #else 121 #define HTOAH32(x) (x) 122 #endif 123 124 static int ath_ifinit(struct ifnet *); 125 static int ath_init(struct ath_softc *); 126 static void ath_stop_locked(struct ifnet *, int); 127 static void ath_stop(struct ifnet *, int); 128 static void ath_start(struct ifnet *); 129 static int ath_media_change(struct ifnet *); 130 static void ath_watchdog(struct ifnet *); 131 static int ath_ioctl(struct ifnet *, u_long, void *); 132 static void ath_fatal_proc(void *, int); 133 static void ath_rxorn_proc(void *, int); 134 static void ath_bmiss_proc(void *, int); 135 static void ath_radar_proc(void *, int); 136 static int ath_key_alloc(struct ieee80211com *, 137 const struct ieee80211_key *, 138 ieee80211_keyix *, ieee80211_keyix *); 139 static int ath_key_delete(struct ieee80211com *, 140 const struct ieee80211_key *); 141 static int ath_key_set(struct ieee80211com *, const struct ieee80211_key *, 142 const u_int8_t mac[IEEE80211_ADDR_LEN]); 143 static void ath_key_update_begin(struct ieee80211com *); 144 static void ath_key_update_end(struct ieee80211com *); 145 static void ath_mode_init(struct ath_softc *); 146 static void ath_setslottime(struct ath_softc *); 147 static void ath_updateslot(struct ifnet *); 148 static int ath_beaconq_setup(struct ath_hal *); 149 static int ath_beacon_alloc(struct ath_softc *, struct ieee80211_node *); 150 static void ath_beacon_setup(struct ath_softc *, struct ath_buf *); 151 static void ath_beacon_proc(void *, int); 152 static void ath_bstuck_proc(void *, int); 153 static void ath_beacon_free(struct ath_softc *); 154 static void ath_beacon_config(struct ath_softc *); 155 static void ath_descdma_cleanup(struct ath_softc *sc, 156 struct ath_descdma *, ath_bufhead *); 157 static int ath_desc_alloc(struct ath_softc *); 158 static void ath_desc_free(struct ath_softc *); 159 static struct ieee80211_node *ath_node_alloc(struct ieee80211_node_table *); 160 static void ath_node_free(struct ieee80211_node *); 161 static u_int8_t ath_node_getrssi(const struct ieee80211_node *); 162 static int ath_rxbuf_init(struct ath_softc *, struct ath_buf *); 163 static void ath_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 164 struct ieee80211_node *ni, 165 int subtype, int rssi, u_int32_t rstamp); 166 static void ath_setdefantenna(struct ath_softc *, u_int); 167 static void ath_rx_proc(void *, int); 168 static struct ath_txq *ath_txq_setup(struct ath_softc*, int qtype, int subtype); 169 static int ath_tx_setup(struct ath_softc *, int, int); 170 static int ath_wme_update(struct ieee80211com *); 171 static void ath_tx_cleanupq(struct ath_softc *, struct ath_txq *); 172 static void ath_tx_cleanup(struct ath_softc *); 173 static int ath_tx_start(struct ath_softc *, struct ieee80211_node *, 174 struct ath_buf *, struct mbuf *); 175 static void ath_tx_proc_q0(void *, int); 176 static void ath_tx_proc_q0123(void *, int); 177 static void ath_tx_proc(void *, int); 178 static int ath_chan_set(struct ath_softc *, struct ieee80211_channel *); 179 static void ath_draintxq(struct ath_softc *); 180 static void ath_stoprecv(struct ath_softc *); 181 static int ath_startrecv(struct ath_softc *); 182 static void ath_chan_change(struct ath_softc *, struct ieee80211_channel *); 183 static void ath_next_scan(void *); 184 static void ath_calibrate(void *); 185 static int ath_newstate(struct ieee80211com *, enum ieee80211_state, int); 186 static void ath_setup_stationkey(struct ieee80211_node *); 187 static void ath_newassoc(struct ieee80211_node *, int); 188 static int ath_getchannels(struct ath_softc *, u_int cc, 189 HAL_BOOL outdoor, HAL_BOOL xchanmode); 190 static void ath_led_event(struct ath_softc *, int); 191 static void ath_update_txpow(struct ath_softc *); 192 static void ath_freetx(struct mbuf *); 193 static void ath_restore_diversity(struct ath_softc *); 194 195 static int ath_rate_setup(struct ath_softc *, u_int mode); 196 static void ath_setcurmode(struct ath_softc *, enum ieee80211_phymode); 197 198 static void ath_bpfattach(struct ath_softc *); 199 static void ath_announce(struct ath_softc *); 200 201 #ifdef __NetBSD__ 202 #define ATH_TASK_FUNC(__func) \ 203 static void __CONCAT(__func, _si)(void *arg) \ 204 { \ 205 __func(arg, 1); \ 206 } 207 ATH_TASK_FUNC(ath_rx_proc); 208 ATH_TASK_FUNC(ath_rxorn_proc); 209 ATH_TASK_FUNC(ath_fatal_proc); 210 ATH_TASK_FUNC(ath_bmiss_proc); 211 ATH_TASK_FUNC(ath_bstuck_proc); 212 ATH_TASK_FUNC(ath_radar_proc); 213 ATH_TASK_FUNC(ath_tx_proc_q0); 214 ATH_TASK_FUNC(ath_tx_proc_q0123); 215 ATH_TASK_FUNC(ath_tx_proc); 216 #endif 217 218 int ath_dwelltime = 200; /* 5 channels/second */ 219 int ath_calinterval = 30; /* calibrate every 30 secs */ 220 int ath_outdoor = AH_TRUE; /* outdoor operation */ 221 int ath_xchanmode = AH_TRUE; /* enable extended channels */ 222 int ath_countrycode = CTRY_DEFAULT; /* country code */ 223 int ath_regdomain = 0; /* regulatory domain */ 224 int ath_debug = 0; 225 int ath_rxbuf = ATH_RXBUF; /* # rx buffers to allocate */ 226 int ath_txbuf = ATH_TXBUF; /* # tx buffers to allocate */ 227 228 #ifdef AR_DEBUG 229 enum { 230 ATH_DEBUG_XMIT = 0x00000001, /* basic xmit operation */ 231 ATH_DEBUG_XMIT_DESC = 0x00000002, /* xmit descriptors */ 232 ATH_DEBUG_RECV = 0x00000004, /* basic recv operation */ 233 ATH_DEBUG_RECV_DESC = 0x00000008, /* recv descriptors */ 234 ATH_DEBUG_RATE = 0x00000010, /* rate control */ 235 ATH_DEBUG_RESET = 0x00000020, /* reset processing */ 236 ATH_DEBUG_MODE = 0x00000040, /* mode init/setup */ 237 ATH_DEBUG_BEACON = 0x00000080, /* beacon handling */ 238 ATH_DEBUG_WATCHDOG = 0x00000100, /* watchdog timeout */ 239 ATH_DEBUG_INTR = 0x00001000, /* ISR */ 240 ATH_DEBUG_TX_PROC = 0x00002000, /* tx ISR proc */ 241 ATH_DEBUG_RX_PROC = 0x00004000, /* rx ISR proc */ 242 ATH_DEBUG_BEACON_PROC = 0x00008000, /* beacon ISR proc */ 243 ATH_DEBUG_CALIBRATE = 0x00010000, /* periodic calibration */ 244 ATH_DEBUG_KEYCACHE = 0x00020000, /* key cache management */ 245 ATH_DEBUG_STATE = 0x00040000, /* 802.11 state transitions */ 246 ATH_DEBUG_NODE = 0x00080000, /* node management */ 247 ATH_DEBUG_LED = 0x00100000, /* led management */ 248 ATH_DEBUG_FF = 0x00200000, /* fast frames */ 249 ATH_DEBUG_DFS = 0x00400000, /* DFS processing */ 250 ATH_DEBUG_FATAL = 0x80000000, /* fatal errors */ 251 ATH_DEBUG_ANY = 0xffffffff 252 }; 253 #define IFF_DUMPPKTS(sc, m) \ 254 ((sc->sc_debug & (m)) || \ 255 (sc->sc_if.if_flags & (IFF_DEBUG | IFF_LINK2)) \ 256 == (IFF_DEBUG | IFF_LINK2)) 257 #define DPRINTF(sc, m, fmt, ...) do { \ 258 if (sc->sc_debug & (m)) \ 259 printf(fmt, __VA_ARGS__); \ 260 } while (0) 261 #define KEYPRINTF(sc, ix, hk, mac) do { \ 262 if (sc->sc_debug & ATH_DEBUG_KEYCACHE) \ 263 ath_keyprint(__func__, ix, hk, mac); \ 264 } while (0) 265 static void ath_printrxbuf(struct ath_buf *bf, int); 266 static void ath_printtxbuf(struct ath_buf *bf, int); 267 #else 268 #define IFF_DUMPPKTS(sc, m) \ 269 ((sc->sc_if.if_flags & (IFF_DEBUG | IFF_LINK2)) \ 270 == (IFF_DEBUG | IFF_LINK2)) 271 #define DPRINTF(m, fmt, ...) 272 #define KEYPRINTF(sc, k, ix, mac) 273 #endif 274 275 MALLOC_DEFINE(M_ATHDEV, "athdev", "ath driver dma buffers"); 276 277 int 278 ath_attach(u_int16_t devid, struct ath_softc *sc) 279 { 280 struct ifnet *ifp = &sc->sc_if; 281 struct ieee80211com *ic = &sc->sc_ic; 282 struct ath_hal *ah = NULL; 283 HAL_STATUS status; 284 int error = 0, i; 285 286 DPRINTF(sc, ATH_DEBUG_ANY, "%s: devid 0x%x\n", __func__, devid); 287 288 pmf_self_suspensor_init(sc->sc_dev, &sc->sc_suspensor, &sc->sc_qual); 289 290 memcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ); 291 292 ah = ath_hal_attach(devid, sc, sc->sc_st, sc->sc_sh, &status); 293 if (ah == NULL) { 294 if_printf(ifp, "unable to attach hardware; HAL status %u\n", 295 status); 296 error = ENXIO; 297 goto bad; 298 } 299 if (ah->ah_abi != HAL_ABI_VERSION) { 300 if_printf(ifp, "HAL ABI mismatch detected " 301 "(HAL:0x%x != driver:0x%x)\n", 302 ah->ah_abi, HAL_ABI_VERSION); 303 error = ENXIO; 304 goto bad; 305 } 306 sc->sc_ah = ah; 307 308 if (!prop_dictionary_set_bool(device_properties(sc->sc_dev), 309 "pmf-powerdown", false)) 310 goto bad; 311 312 /* 313 * Check if the MAC has multi-rate retry support. 314 * We do this by trying to setup a fake extended 315 * descriptor. MAC's that don't have support will 316 * return false w/o doing anything. MAC's that do 317 * support it will return true w/o doing anything. 318 */ 319 sc->sc_mrretry = ath_hal_setupxtxdesc(ah, NULL, 0,0, 0,0, 0,0); 320 321 /* 322 * Check if the device has hardware counters for PHY 323 * errors. If so we need to enable the MIB interrupt 324 * so we can act on stat triggers. 325 */ 326 if (ath_hal_hwphycounters(ah)) 327 sc->sc_needmib = 1; 328 329 /* 330 * Get the hardware key cache size. 331 */ 332 sc->sc_keymax = ath_hal_keycachesize(ah); 333 if (sc->sc_keymax > ATH_KEYMAX) { 334 if_printf(ifp, "Warning, using only %u of %u key cache slots\n", 335 ATH_KEYMAX, sc->sc_keymax); 336 sc->sc_keymax = ATH_KEYMAX; 337 } 338 /* 339 * Reset the key cache since some parts do not 340 * reset the contents on initial power up. 341 */ 342 for (i = 0; i < sc->sc_keymax; i++) 343 ath_hal_keyreset(ah, i); 344 /* 345 * Mark key cache slots associated with global keys 346 * as in use. If we knew TKIP was not to be used we 347 * could leave the +32, +64, and +32+64 slots free. 348 * XXX only for splitmic. 349 */ 350 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 351 setbit(sc->sc_keymap, i); 352 setbit(sc->sc_keymap, i+32); 353 setbit(sc->sc_keymap, i+64); 354 setbit(sc->sc_keymap, i+32+64); 355 } 356 357 /* 358 * Collect the channel list using the default country 359 * code and including outdoor channels. The 802.11 layer 360 * is resposible for filtering this list based on settings 361 * like the phy mode. 362 */ 363 error = ath_getchannels(sc, ath_countrycode, 364 ath_outdoor, ath_xchanmode); 365 if (error != 0) 366 goto bad; 367 368 /* 369 * Setup rate tables for all potential media types. 370 */ 371 ath_rate_setup(sc, IEEE80211_MODE_11A); 372 ath_rate_setup(sc, IEEE80211_MODE_11B); 373 ath_rate_setup(sc, IEEE80211_MODE_11G); 374 ath_rate_setup(sc, IEEE80211_MODE_TURBO_A); 375 ath_rate_setup(sc, IEEE80211_MODE_TURBO_G); 376 /* NB: setup here so ath_rate_update is happy */ 377 ath_setcurmode(sc, IEEE80211_MODE_11A); 378 379 /* 380 * Allocate tx+rx descriptors and populate the lists. 381 */ 382 error = ath_desc_alloc(sc); 383 if (error != 0) { 384 if_printf(ifp, "failed to allocate descriptors: %d\n", error); 385 goto bad; 386 } 387 ATH_CALLOUT_INIT(&sc->sc_scan_ch, debug_mpsafenet ? CALLOUT_MPSAFE : 0); 388 ATH_CALLOUT_INIT(&sc->sc_cal_ch, CALLOUT_MPSAFE); 389 #if 0 390 ATH_CALLOUT_INIT(&sc->sc_dfs_ch, CALLOUT_MPSAFE); 391 #endif 392 393 ATH_TXBUF_LOCK_INIT(sc); 394 395 TASK_INIT(&sc->sc_rxtask, 0, ath_rx_proc, sc); 396 TASK_INIT(&sc->sc_rxorntask, 0, ath_rxorn_proc, sc); 397 TASK_INIT(&sc->sc_fataltask, 0, ath_fatal_proc, sc); 398 TASK_INIT(&sc->sc_bmisstask, 0, ath_bmiss_proc, sc); 399 TASK_INIT(&sc->sc_bstucktask,0, ath_bstuck_proc, sc); 400 TASK_INIT(&sc->sc_radartask, 0, ath_radar_proc, sc); 401 402 /* 403 * Allocate hardware transmit queues: one queue for 404 * beacon frames and one data queue for each QoS 405 * priority. Note that the hal handles reseting 406 * these queues at the needed time. 407 * 408 * XXX PS-Poll 409 */ 410 sc->sc_bhalq = ath_beaconq_setup(ah); 411 if (sc->sc_bhalq == (u_int) -1) { 412 if_printf(ifp, "unable to setup a beacon xmit queue!\n"); 413 error = EIO; 414 goto bad2; 415 } 416 sc->sc_cabq = ath_txq_setup(sc, HAL_TX_QUEUE_CAB, 0); 417 if (sc->sc_cabq == NULL) { 418 if_printf(ifp, "unable to setup CAB xmit queue!\n"); 419 error = EIO; 420 goto bad2; 421 } 422 /* NB: insure BK queue is the lowest priority h/w queue */ 423 if (!ath_tx_setup(sc, WME_AC_BK, HAL_WME_AC_BK)) { 424 if_printf(ifp, "unable to setup xmit queue for %s traffic!\n", 425 ieee80211_wme_acnames[WME_AC_BK]); 426 error = EIO; 427 goto bad2; 428 } 429 if (!ath_tx_setup(sc, WME_AC_BE, HAL_WME_AC_BE) || 430 !ath_tx_setup(sc, WME_AC_VI, HAL_WME_AC_VI) || 431 !ath_tx_setup(sc, WME_AC_VO, HAL_WME_AC_VO)) { 432 /* 433 * Not enough hardware tx queues to properly do WME; 434 * just punt and assign them all to the same h/w queue. 435 * We could do a better job of this if, for example, 436 * we allocate queues when we switch from station to 437 * AP mode. 438 */ 439 if (sc->sc_ac2q[WME_AC_VI] != NULL) 440 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_VI]); 441 if (sc->sc_ac2q[WME_AC_BE] != NULL) 442 ath_tx_cleanupq(sc, sc->sc_ac2q[WME_AC_BE]); 443 sc->sc_ac2q[WME_AC_BE] = sc->sc_ac2q[WME_AC_BK]; 444 sc->sc_ac2q[WME_AC_VI] = sc->sc_ac2q[WME_AC_BK]; 445 sc->sc_ac2q[WME_AC_VO] = sc->sc_ac2q[WME_AC_BK]; 446 } 447 448 /* 449 * Special case certain configurations. Note the 450 * CAB queue is handled by these specially so don't 451 * include them when checking the txq setup mask. 452 */ 453 switch (sc->sc_txqsetup &~ (1<<sc->sc_cabq->axq_qnum)) { 454 case 0x01: 455 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0, sc); 456 break; 457 case 0x0f: 458 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc_q0123, sc); 459 break; 460 default: 461 TASK_INIT(&sc->sc_txtask, 0, ath_tx_proc, sc); 462 break; 463 } 464 465 /* 466 * Setup rate control. Some rate control modules 467 * call back to change the anntena state so expose 468 * the necessary entry points. 469 * XXX maybe belongs in struct ath_ratectrl? 470 */ 471 sc->sc_setdefantenna = ath_setdefantenna; 472 sc->sc_rc = ath_rate_attach(sc); 473 if (sc->sc_rc == NULL) { 474 error = EIO; 475 goto bad2; 476 } 477 478 sc->sc_blinking = 0; 479 sc->sc_ledstate = 1; 480 sc->sc_ledon = 0; /* low true */ 481 sc->sc_ledidle = (2700*hz)/1000; /* 2.7sec */ 482 ATH_CALLOUT_INIT(&sc->sc_ledtimer, CALLOUT_MPSAFE); 483 /* 484 * Auto-enable soft led processing for IBM cards and for 485 * 5211 minipci cards. Users can also manually enable/disable 486 * support with a sysctl. 487 */ 488 sc->sc_softled = (devid == AR5212_DEVID_IBM || devid == AR5211_DEVID); 489 if (sc->sc_softled) { 490 ath_hal_gpioCfgOutput(ah, sc->sc_ledpin, 491 HAL_GPIO_MUX_MAC_NETWORK_LED); 492 ath_hal_gpioset(ah, sc->sc_ledpin, !sc->sc_ledon); 493 } 494 495 ifp->if_softc = sc; 496 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 497 ifp->if_start = ath_start; 498 ifp->if_stop = ath_stop; 499 ifp->if_watchdog = ath_watchdog; 500 ifp->if_ioctl = ath_ioctl; 501 ifp->if_init = ath_ifinit; 502 IFQ_SET_READY(&ifp->if_snd); 503 504 ic->ic_ifp = ifp; 505 ic->ic_reset = ath_reset; 506 ic->ic_newassoc = ath_newassoc; 507 ic->ic_updateslot = ath_updateslot; 508 ic->ic_wme.wme_update = ath_wme_update; 509 /* XXX not right but it's not used anywhere important */ 510 ic->ic_phytype = IEEE80211_T_OFDM; 511 ic->ic_opmode = IEEE80211_M_STA; 512 ic->ic_caps = 513 IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ 514 | IEEE80211_C_HOSTAP /* hostap mode */ 515 | IEEE80211_C_MONITOR /* monitor mode */ 516 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 517 | IEEE80211_C_SHSLOT /* short slot time supported */ 518 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ 519 | IEEE80211_C_TXFRAG /* handle tx frags */ 520 ; 521 /* 522 * Query the hal to figure out h/w crypto support. 523 */ 524 if (ath_hal_ciphersupported(ah, HAL_CIPHER_WEP)) 525 ic->ic_caps |= IEEE80211_C_WEP; 526 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_OCB)) 527 ic->ic_caps |= IEEE80211_C_AES; 528 if (ath_hal_ciphersupported(ah, HAL_CIPHER_AES_CCM)) 529 ic->ic_caps |= IEEE80211_C_AES_CCM; 530 if (ath_hal_ciphersupported(ah, HAL_CIPHER_CKIP)) 531 ic->ic_caps |= IEEE80211_C_CKIP; 532 if (ath_hal_ciphersupported(ah, HAL_CIPHER_TKIP)) { 533 ic->ic_caps |= IEEE80211_C_TKIP; 534 /* 535 * Check if h/w does the MIC and/or whether the 536 * separate key cache entries are required to 537 * handle both tx+rx MIC keys. 538 */ 539 if (ath_hal_ciphersupported(ah, HAL_CIPHER_MIC)) 540 ic->ic_caps |= IEEE80211_C_TKIPMIC; 541 542 /* 543 * If the h/w supports storing tx+rx MIC keys 544 * in one cache slot automatically enable use. 545 */ 546 if (ath_hal_hastkipsplit(ah) || 547 !ath_hal_settkipsplit(ah, AH_FALSE)) 548 sc->sc_splitmic = 1; 549 550 /* 551 * If the h/w can do TKIP MIC together with WME then 552 * we use it; otherwise we force the MIC to be done 553 * in software by the net80211 layer. 554 */ 555 if (ath_hal_haswmetkipmic(ah)) 556 ic->ic_caps |= IEEE80211_C_WME_TKIPMIC; 557 } 558 sc->sc_hasclrkey = ath_hal_ciphersupported(ah, HAL_CIPHER_CLR); 559 sc->sc_mcastkey = ath_hal_getmcastkeysearch(ah); 560 /* 561 * Mark key cache slots associated with global keys 562 * as in use. If we knew TKIP was not to be used we 563 * could leave the +32, +64, and +32+64 slots free. 564 */ 565 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 566 setbit(sc->sc_keymap, i); 567 setbit(sc->sc_keymap, i+64); 568 if (sc->sc_splitmic) { 569 setbit(sc->sc_keymap, i+32); 570 setbit(sc->sc_keymap, i+32+64); 571 } 572 } 573 /* 574 * TPC support can be done either with a global cap or 575 * per-packet support. The latter is not available on 576 * all parts. We're a bit pedantic here as all parts 577 * support a global cap. 578 */ 579 if (ath_hal_hastpc(ah) || ath_hal_hastxpowlimit(ah)) 580 ic->ic_caps |= IEEE80211_C_TXPMGT; 581 582 /* 583 * Mark WME capability only if we have sufficient 584 * hardware queues to do proper priority scheduling. 585 */ 586 if (sc->sc_ac2q[WME_AC_BE] != sc->sc_ac2q[WME_AC_BK]) 587 ic->ic_caps |= IEEE80211_C_WME; 588 /* 589 * Check for misc other capabilities. 590 */ 591 if (ath_hal_hasbursting(ah)) 592 ic->ic_caps |= IEEE80211_C_BURST; 593 594 /* 595 * Indicate we need the 802.11 header padded to a 596 * 32-bit boundary for 4-address and QoS frames. 597 */ 598 ic->ic_flags |= IEEE80211_F_DATAPAD; 599 600 /* 601 * Query the hal about antenna support. 602 */ 603 sc->sc_defant = ath_hal_getdefantenna(ah); 604 605 /* 606 * Not all chips have the VEOL support we want to 607 * use with IBSS beacons; check here for it. 608 */ 609 sc->sc_hasveol = ath_hal_hasveol(ah); 610 611 /* get mac address from hardware */ 612 ath_hal_getmac(ah, ic->ic_myaddr); 613 614 if_attach(ifp); 615 /* call MI attach routine. */ 616 ieee80211_ifattach(ic); 617 /* override default methods */ 618 ic->ic_node_alloc = ath_node_alloc; 619 sc->sc_node_free = ic->ic_node_free; 620 ic->ic_node_free = ath_node_free; 621 ic->ic_node_getrssi = ath_node_getrssi; 622 sc->sc_recv_mgmt = ic->ic_recv_mgmt; 623 ic->ic_recv_mgmt = ath_recv_mgmt; 624 sc->sc_newstate = ic->ic_newstate; 625 ic->ic_newstate = ath_newstate; 626 ic->ic_crypto.cs_max_keyix = sc->sc_keymax; 627 ic->ic_crypto.cs_key_alloc = ath_key_alloc; 628 ic->ic_crypto.cs_key_delete = ath_key_delete; 629 ic->ic_crypto.cs_key_set = ath_key_set; 630 ic->ic_crypto.cs_key_update_begin = ath_key_update_begin; 631 ic->ic_crypto.cs_key_update_end = ath_key_update_end; 632 /* complete initialization */ 633 ieee80211_media_init(ic, ath_media_change, ieee80211_media_status); 634 635 ath_bpfattach(sc); 636 637 sc->sc_flags |= ATH_ATTACHED; 638 639 /* 640 * Setup dynamic sysctl's now that country code and 641 * regdomain are available from the hal. 642 */ 643 ath_sysctlattach(sc); 644 645 ieee80211_announce(ic); 646 ath_announce(sc); 647 return 0; 648 bad2: 649 ath_tx_cleanup(sc); 650 ath_desc_free(sc); 651 bad: 652 if (ah) 653 ath_hal_detach(ah); 654 /* XXX don't get under the abstraction like this */ 655 sc->sc_dev->dv_flags &= ~DVF_ACTIVE; 656 return error; 657 } 658 659 int 660 ath_detach(struct ath_softc *sc) 661 { 662 struct ifnet *ifp = &sc->sc_if; 663 int s; 664 665 if ((sc->sc_flags & ATH_ATTACHED) == 0) 666 return (0); 667 668 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags %x\n", 669 __func__, ifp->if_flags); 670 671 s = splnet(); 672 ath_stop(ifp, 1); 673 bpf_detach(ifp); 674 /* 675 * NB: the order of these is important: 676 * o call the 802.11 layer before detaching the hal to 677 * insure callbacks into the driver to delete global 678 * key cache entries can be handled 679 * o reclaim the tx queue data structures after calling 680 * the 802.11 layer as we'll get called back to reclaim 681 * node state and potentially want to use them 682 * o to cleanup the tx queues the hal is called, so detach 683 * it last 684 * Other than that, it's straightforward... 685 */ 686 ieee80211_ifdetach(&sc->sc_ic); 687 #ifdef ATH_TX99_DIAG 688 if (sc->sc_tx99 != NULL) 689 sc->sc_tx99->detach(sc->sc_tx99); 690 #endif 691 ath_rate_detach(sc->sc_rc); 692 ath_desc_free(sc); 693 ath_tx_cleanup(sc); 694 sysctl_teardown(&sc->sc_sysctllog); 695 ath_hal_detach(sc->sc_ah); 696 if_detach(ifp); 697 splx(s); 698 699 return 0; 700 } 701 702 void 703 ath_suspend(struct ath_softc *sc) 704 { 705 #if notyet 706 /* 707 * Set the chip in full sleep mode. Note that we are 708 * careful to do this only when bringing the interface 709 * completely to a stop. When the chip is in this state 710 * it must be carefully woken up or references to 711 * registers in the PCI clock domain may freeze the bus 712 * (and system). This varies by chip and is mostly an 713 * issue with newer parts that go to sleep more quickly. 714 */ 715 ath_hal_setpower(sc->sc_ah, HAL_PM_FULL_SLEEP); 716 #endif 717 } 718 719 bool 720 ath_resume(struct ath_softc *sc) 721 { 722 struct ath_hal *ah = sc->sc_ah; 723 struct ieee80211com *ic = &sc->sc_ic; 724 HAL_STATUS status; 725 int i; 726 727 #if notyet 728 ath_hal_setpower(ah, HAL_PM_AWAKE); 729 #else 730 ath_hal_reset(ah, ic->ic_opmode, &sc->sc_curchan, AH_FALSE, &status); 731 #endif 732 733 /* 734 * Reset the key cache since some parts do not 735 * reset the contents on initial power up. 736 */ 737 for (i = 0; i < sc->sc_keymax; i++) 738 ath_hal_keyreset(ah, i); 739 740 ath_hal_resettxqueue(ah, sc->sc_bhalq); 741 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 742 if (ATH_TXQ_SETUP(sc, i)) 743 ath_hal_resettxqueue(ah, i); 744 745 if (sc->sc_softled) { 746 ath_hal_gpioCfgOutput(sc->sc_ah, sc->sc_ledpin, 747 HAL_GPIO_MUX_MAC_NETWORK_LED); 748 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, !sc->sc_ledon); 749 } 750 return true; 751 } 752 753 /* 754 * Interrupt handler. Most of the actual processing is deferred. 755 */ 756 int 757 ath_intr(void *arg) 758 { 759 struct ath_softc *sc = arg; 760 struct ifnet *ifp = &sc->sc_if; 761 struct ath_hal *ah = sc->sc_ah; 762 HAL_INT status = 0; 763 764 if (!device_activation(sc->sc_dev, DEVACT_LEVEL_DRIVER)) { 765 /* 766 * The hardware is not ready/present, don't touch anything. 767 * Note this can happen early on if the IRQ is shared. 768 */ 769 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid; ignored\n", __func__); 770 return 0; 771 } 772 773 if (!ath_hal_intrpend(ah)) /* shared irq, not for us */ 774 return 0; 775 776 if ((ifp->if_flags & (IFF_RUNNING |IFF_UP)) != (IFF_RUNNING |IFF_UP)) { 777 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 778 __func__, ifp->if_flags); 779 ath_hal_getisr(ah, &status); /* clear ISR */ 780 ath_hal_intrset(ah, 0); /* disable further intr's */ 781 return 1; /* XXX */ 782 } 783 /* 784 * Figure out the reason(s) for the interrupt. Note 785 * that the hal returns a pseudo-ISR that may include 786 * bits we haven't explicitly enabled so we mask the 787 * value to insure we only process bits we requested. 788 */ 789 ath_hal_getisr(ah, &status); /* NB: clears ISR too */ 790 DPRINTF(sc, ATH_DEBUG_INTR, "%s: status 0x%x\n", __func__, status); 791 status &= sc->sc_imask; /* discard unasked for bits */ 792 if (status & HAL_INT_FATAL) { 793 /* 794 * Fatal errors are unrecoverable. Typically 795 * these are caused by DMA errors. Unfortunately 796 * the exact reason is not (presently) returned 797 * by the hal. 798 */ 799 sc->sc_stats.ast_hardware++; 800 ath_hal_intrset(ah, 0); /* disable intr's until reset */ 801 TASK_RUN_OR_ENQUEUE(&sc->sc_fataltask); 802 } else if (status & HAL_INT_RXORN) { 803 sc->sc_stats.ast_rxorn++; 804 ath_hal_intrset(ah, 0); /* disable intr's until reset */ 805 TASK_RUN_OR_ENQUEUE(&sc->sc_rxorntask); 806 } else { 807 if (status & HAL_INT_SWBA) { 808 /* 809 * Software beacon alert--time to send a beacon. 810 * Handle beacon transmission directly; deferring 811 * this is too slow to meet timing constraints 812 * under load. 813 */ 814 ath_beacon_proc(sc, 0); 815 } 816 if (status & HAL_INT_RXEOL) { 817 /* 818 * NB: the hardware should re-read the link when 819 * RXE bit is written, but it doesn't work at 820 * least on older hardware revs. 821 */ 822 sc->sc_stats.ast_rxeol++; 823 sc->sc_rxlink = NULL; 824 } 825 if (status & HAL_INT_TXURN) { 826 sc->sc_stats.ast_txurn++; 827 /* bump tx trigger level */ 828 ath_hal_updatetxtriglevel(ah, AH_TRUE); 829 } 830 if (status & HAL_INT_RX) 831 TASK_RUN_OR_ENQUEUE(&sc->sc_rxtask); 832 if (status & HAL_INT_TX) 833 TASK_RUN_OR_ENQUEUE(&sc->sc_txtask); 834 if (status & HAL_INT_BMISS) { 835 sc->sc_stats.ast_bmiss++; 836 TASK_RUN_OR_ENQUEUE(&sc->sc_bmisstask); 837 } 838 if (status & HAL_INT_MIB) { 839 sc->sc_stats.ast_mib++; 840 /* 841 * Disable interrupts until we service the MIB 842 * interrupt; otherwise it will continue to fire. 843 */ 844 ath_hal_intrset(ah, 0); 845 /* 846 * Let the hal handle the event. We assume it will 847 * clear whatever condition caused the interrupt. 848 */ 849 ath_hal_mibevent(ah, &sc->sc_halstats); 850 ath_hal_intrset(ah, sc->sc_imask); 851 } 852 } 853 return 1; 854 } 855 856 /* Swap transmit descriptor. 857 * if AH_NEED_DESC_SWAP flag is not defined this becomes a "null" 858 * function. 859 */ 860 static inline void 861 ath_desc_swap(struct ath_desc *ds) 862 { 863 #ifdef AH_NEED_DESC_SWAP 864 ds->ds_link = htole32(ds->ds_link); 865 ds->ds_data = htole32(ds->ds_data); 866 ds->ds_ctl0 = htole32(ds->ds_ctl0); 867 ds->ds_ctl1 = htole32(ds->ds_ctl1); 868 ds->ds_hw[0] = htole32(ds->ds_hw[0]); 869 ds->ds_hw[1] = htole32(ds->ds_hw[1]); 870 #endif 871 } 872 873 static void 874 ath_fatal_proc(void *arg, int pending) 875 { 876 struct ath_softc *sc = arg; 877 struct ifnet *ifp = &sc->sc_if; 878 #ifdef __NetBSD__ 879 int s; 880 #endif 881 882 if_printf(ifp, "hardware error; resetting\n"); 883 #ifdef __NetBSD__ 884 s = splnet(); 885 #endif 886 ath_reset(ifp); 887 #ifdef __NetBSD__ 888 splx(s); 889 #endif 890 } 891 892 static void 893 ath_rxorn_proc(void *arg, int pending) 894 { 895 struct ath_softc *sc = arg; 896 struct ifnet *ifp = &sc->sc_if; 897 #ifdef __NetBSD__ 898 int s; 899 #endif 900 901 if_printf(ifp, "rx FIFO overrun; resetting\n"); 902 #ifdef __NetBSD__ 903 s = splnet(); 904 #endif 905 ath_reset(ifp); 906 #ifdef __NetBSD__ 907 splx(s); 908 #endif 909 } 910 911 static void 912 ath_bmiss_proc(void *arg, int pending) 913 { 914 struct ath_softc *sc = arg; 915 struct ieee80211com *ic = &sc->sc_ic; 916 NET_LOCK_GIANT_FUNC_INIT(); 917 918 DPRINTF(sc, ATH_DEBUG_ANY, "%s: pending %u\n", __func__, pending); 919 KASSERTMSG(ic->ic_opmode == IEEE80211_M_STA, 920 "unexpect operating mode %u", ic->ic_opmode); 921 if (ic->ic_state == IEEE80211_S_RUN) { 922 u_int64_t lastrx = sc->sc_lastrx; 923 u_int64_t tsf = ath_hal_gettsf64(sc->sc_ah); 924 925 DPRINTF(sc, ATH_DEBUG_BEACON, 926 "%s: tsf %" PRIu64 " lastrx %" PRId64 927 " (%" PRIu64 ") bmiss %u\n", 928 __func__, tsf, tsf - lastrx, lastrx, 929 ic->ic_bmisstimeout*1024); 930 /* 931 * Workaround phantom bmiss interrupts by sanity-checking 932 * the time of our last rx'd frame. If it is within the 933 * beacon miss interval then ignore the interrupt. If it's 934 * truly a bmiss we'll get another interrupt soon and that'll 935 * be dispatched up for processing. 936 */ 937 if (tsf - lastrx > ic->ic_bmisstimeout*1024) { 938 NET_LOCK_GIANT(); 939 ieee80211_beacon_miss(ic); 940 NET_UNLOCK_GIANT(); 941 } else 942 sc->sc_stats.ast_bmiss_phantom++; 943 } 944 } 945 946 static void 947 ath_radar_proc(void *arg, int pending) 948 { 949 #if 0 950 struct ath_softc *sc = arg; 951 struct ifnet *ifp = &sc->sc_if; 952 struct ath_hal *ah = sc->sc_ah; 953 HAL_CHANNEL hchan; 954 955 if (ath_hal_procdfs(ah, &hchan)) { 956 if_printf(ifp, "radar detected on channel %u/0x%x/0x%x\n", 957 hchan.channel, hchan.channelFlags, hchan.privFlags); 958 /* 959 * Initiate channel change. 960 */ 961 /* XXX not yet */ 962 } 963 #endif 964 } 965 966 static u_int 967 ath_chan2flags(struct ieee80211com *ic, struct ieee80211_channel *chan) 968 { 969 #define N(a) (sizeof(a) / sizeof(a[0])) 970 static const u_int modeflags[] = { 971 0, /* IEEE80211_MODE_AUTO */ 972 CHANNEL_A, /* IEEE80211_MODE_11A */ 973 CHANNEL_B, /* IEEE80211_MODE_11B */ 974 CHANNEL_PUREG, /* IEEE80211_MODE_11G */ 975 0, /* IEEE80211_MODE_FH */ 976 CHANNEL_ST, /* IEEE80211_MODE_TURBO_A */ 977 CHANNEL_108G /* IEEE80211_MODE_TURBO_G */ 978 }; 979 enum ieee80211_phymode mode = ieee80211_chan2mode(ic, chan); 980 981 KASSERTMSG(mode < N(modeflags), "unexpected phy mode %u", mode); 982 KASSERTMSG(modeflags[mode] != 0, "mode %u undefined", mode); 983 return modeflags[mode]; 984 #undef N 985 } 986 987 static int 988 ath_ifinit(struct ifnet *ifp) 989 { 990 struct ath_softc *sc = (struct ath_softc *)ifp->if_softc; 991 992 return ath_init(sc); 993 } 994 995 static void 996 ath_settkipmic(struct ath_softc *sc) 997 { 998 struct ieee80211com *ic = &sc->sc_ic; 999 struct ath_hal *ah = sc->sc_ah; 1000 1001 if ((ic->ic_caps & IEEE80211_C_TKIP) && 1002 !(ic->ic_caps & IEEE80211_C_WME_TKIPMIC)) { 1003 if (ic->ic_flags & IEEE80211_F_WME) { 1004 (void)ath_hal_settkipmic(ah, AH_FALSE); 1005 ic->ic_caps &= ~IEEE80211_C_TKIPMIC; 1006 } else { 1007 (void)ath_hal_settkipmic(ah, AH_TRUE); 1008 ic->ic_caps |= IEEE80211_C_TKIPMIC; 1009 } 1010 } 1011 } 1012 1013 static int 1014 ath_init(struct ath_softc *sc) 1015 { 1016 struct ifnet *ifp = &sc->sc_if; 1017 struct ieee80211com *ic = &sc->sc_ic; 1018 struct ath_hal *ah = sc->sc_ah; 1019 HAL_STATUS status; 1020 int error = 0, s; 1021 1022 DPRINTF(sc, ATH_DEBUG_ANY, "%s: if_flags 0x%x\n", 1023 __func__, ifp->if_flags); 1024 1025 if (device_is_active(sc->sc_dev)) { 1026 s = splnet(); 1027 } else if (!pmf_device_subtree_resume(sc->sc_dev, &sc->sc_qual) || 1028 !device_is_active(sc->sc_dev)) 1029 return 0; 1030 else 1031 s = splnet(); 1032 1033 /* 1034 * Stop anything previously setup. This is safe 1035 * whether this is the first time through or not. 1036 */ 1037 ath_stop_locked(ifp, 0); 1038 1039 /* 1040 * The basic interface to setting the hardware in a good 1041 * state is ``reset''. On return the hardware is known to 1042 * be powered up and with interrupts disabled. This must 1043 * be followed by initialization of the appropriate bits 1044 * and then setup of the interrupt mask. 1045 */ 1046 ath_settkipmic(sc); 1047 sc->sc_curchan.channel = ic->ic_curchan->ic_freq; 1048 sc->sc_curchan.channelFlags = ath_chan2flags(ic, ic->ic_curchan); 1049 if (!ath_hal_reset(ah, ic->ic_opmode, &sc->sc_curchan, AH_FALSE, &status)) { 1050 if_printf(ifp, "unable to reset hardware; hal status %u\n", 1051 status); 1052 error = EIO; 1053 goto done; 1054 } 1055 1056 /* 1057 * This is needed only to setup initial state 1058 * but it's best done after a reset. 1059 */ 1060 ath_update_txpow(sc); 1061 /* 1062 * Likewise this is set during reset so update 1063 * state cached in the driver. 1064 */ 1065 ath_restore_diversity(sc); 1066 sc->sc_calinterval = 1; 1067 sc->sc_caltries = 0; 1068 1069 /* 1070 * Setup the hardware after reset: the key cache 1071 * is filled as needed and the receive engine is 1072 * set going. Frame transmit is handled entirely 1073 * in the frame output path; there's nothing to do 1074 * here except setup the interrupt mask. 1075 */ 1076 if ((error = ath_startrecv(sc)) != 0) { 1077 if_printf(ifp, "unable to start recv logic\n"); 1078 goto done; 1079 } 1080 1081 /* 1082 * Enable interrupts. 1083 */ 1084 sc->sc_imask = HAL_INT_RX | HAL_INT_TX 1085 | HAL_INT_RXEOL | HAL_INT_RXORN 1086 | HAL_INT_FATAL | HAL_INT_GLOBAL; 1087 /* 1088 * Enable MIB interrupts when there are hardware phy counters. 1089 * Note we only do this (at the moment) for station mode. 1090 */ 1091 if (sc->sc_needmib && ic->ic_opmode == IEEE80211_M_STA) 1092 sc->sc_imask |= HAL_INT_MIB; 1093 ath_hal_intrset(ah, sc->sc_imask); 1094 1095 ifp->if_flags |= IFF_RUNNING; 1096 ic->ic_state = IEEE80211_S_INIT; 1097 1098 /* 1099 * The hardware should be ready to go now so it's safe 1100 * to kick the 802.11 state machine as it's likely to 1101 * immediately call back to us to send mgmt frames. 1102 */ 1103 ath_chan_change(sc, ic->ic_curchan); 1104 #ifdef ATH_TX99_DIAG 1105 if (sc->sc_tx99 != NULL) 1106 sc->sc_tx99->start(sc->sc_tx99); 1107 else 1108 #endif 1109 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 1110 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 1111 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 1112 } else 1113 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 1114 done: 1115 splx(s); 1116 return error; 1117 } 1118 1119 static void 1120 ath_stop_locked(struct ifnet *ifp, int disable) 1121 { 1122 struct ath_softc *sc = ifp->if_softc; 1123 struct ieee80211com *ic = &sc->sc_ic; 1124 struct ath_hal *ah = sc->sc_ah; 1125 1126 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid %d if_flags 0x%x\n", 1127 __func__, !device_is_enabled(sc->sc_dev), ifp->if_flags); 1128 1129 /* KASSERT() IPL_NET */ 1130 if (ifp->if_flags & IFF_RUNNING) { 1131 /* 1132 * Shutdown the hardware and driver: 1133 * reset 802.11 state machine 1134 * turn off timers 1135 * disable interrupts 1136 * turn off the radio 1137 * clear transmit machinery 1138 * clear receive machinery 1139 * drain and release tx queues 1140 * reclaim beacon resources 1141 * power down hardware 1142 * 1143 * Note that some of this work is not possible if the 1144 * hardware is gone (invalid). 1145 */ 1146 #ifdef ATH_TX99_DIAG 1147 if (sc->sc_tx99 != NULL) 1148 sc->sc_tx99->stop(sc->sc_tx99); 1149 #endif 1150 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 1151 ifp->if_flags &= ~IFF_RUNNING; 1152 ifp->if_timer = 0; 1153 if (device_is_enabled(sc->sc_dev)) { 1154 if (sc->sc_softled) { 1155 callout_stop(&sc->sc_ledtimer); 1156 ath_hal_gpioset(ah, sc->sc_ledpin, 1157 !sc->sc_ledon); 1158 sc->sc_blinking = 0; 1159 } 1160 ath_hal_intrset(ah, 0); 1161 } 1162 ath_draintxq(sc); 1163 if (device_is_enabled(sc->sc_dev)) { 1164 ath_stoprecv(sc); 1165 ath_hal_phydisable(ah); 1166 } else 1167 sc->sc_rxlink = NULL; 1168 IF_PURGE(&ifp->if_snd); 1169 ath_beacon_free(sc); 1170 } 1171 if (disable) 1172 pmf_device_suspend(sc->sc_dev, &sc->sc_qual); 1173 } 1174 1175 static void 1176 ath_stop(struct ifnet *ifp, int disable) 1177 { 1178 int s; 1179 1180 s = splnet(); 1181 ath_stop_locked(ifp, disable); 1182 splx(s); 1183 } 1184 1185 static void 1186 ath_restore_diversity(struct ath_softc *sc) 1187 { 1188 struct ifnet *ifp = &sc->sc_if; 1189 struct ath_hal *ah = sc->sc_ah; 1190 1191 if (!ath_hal_setdiversity(sc->sc_ah, sc->sc_diversity) || 1192 sc->sc_diversity != ath_hal_getdiversity(ah)) { 1193 if_printf(ifp, "could not restore diversity setting %d\n", 1194 sc->sc_diversity); 1195 sc->sc_diversity = ath_hal_getdiversity(ah); 1196 } 1197 } 1198 1199 /* 1200 * Reset the hardware w/o losing operational state. This is 1201 * basically a more efficient way of doing ath_stop, ath_init, 1202 * followed by state transitions to the current 802.11 1203 * operational state. Used to recover from various errors and 1204 * to reset or reload hardware state. 1205 */ 1206 int 1207 ath_reset(struct ifnet *ifp) 1208 { 1209 struct ath_softc *sc = ifp->if_softc; 1210 struct ieee80211com *ic = &sc->sc_ic; 1211 struct ath_hal *ah = sc->sc_ah; 1212 struct ieee80211_channel *c; 1213 HAL_STATUS status; 1214 1215 /* 1216 * Convert to a HAL channel description with the flags 1217 * constrained to reflect the current operating mode. 1218 */ 1219 c = ic->ic_curchan; 1220 sc->sc_curchan.channel = c->ic_freq; 1221 sc->sc_curchan.channelFlags = ath_chan2flags(ic, c); 1222 1223 ath_hal_intrset(ah, 0); /* disable interrupts */ 1224 ath_draintxq(sc); /* stop xmit side */ 1225 ath_stoprecv(sc); /* stop recv side */ 1226 ath_settkipmic(sc); /* configure TKIP MIC handling */ 1227 /* NB: indicate channel change so we do a full reset */ 1228 if (!ath_hal_reset(ah, ic->ic_opmode, &sc->sc_curchan, AH_TRUE, &status)) 1229 if_printf(ifp, "%s: unable to reset hardware; hal status %u\n", 1230 __func__, status); 1231 ath_update_txpow(sc); /* update tx power state */ 1232 ath_restore_diversity(sc); 1233 sc->sc_calinterval = 1; 1234 sc->sc_caltries = 0; 1235 if (ath_startrecv(sc) != 0) /* restart recv */ 1236 if_printf(ifp, "%s: unable to start recv logic\n", __func__); 1237 /* 1238 * We may be doing a reset in response to an ioctl 1239 * that changes the channel so update any state that 1240 * might change as a result. 1241 */ 1242 ath_chan_change(sc, c); 1243 if (ic->ic_state == IEEE80211_S_RUN) 1244 ath_beacon_config(sc); /* restart beacons */ 1245 ath_hal_intrset(ah, sc->sc_imask); 1246 1247 ath_start(ifp); /* restart xmit */ 1248 return 0; 1249 } 1250 1251 /* 1252 * Cleanup driver resources when we run out of buffers 1253 * while processing fragments; return the tx buffers 1254 * allocated and drop node references. 1255 */ 1256 static void 1257 ath_txfrag_cleanup(struct ath_softc *sc, 1258 ath_bufhead *frags, struct ieee80211_node *ni) 1259 { 1260 struct ath_buf *bf; 1261 1262 ATH_TXBUF_LOCK_ASSERT(sc); 1263 1264 while ((bf = STAILQ_FIRST(frags)) != NULL) { 1265 STAILQ_REMOVE_HEAD(frags, bf_list); 1266 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1267 sc->sc_if.if_flags &= ~IFF_OACTIVE; 1268 ieee80211_node_decref(ni); 1269 } 1270 } 1271 1272 /* 1273 * Setup xmit of a fragmented frame. Allocate a buffer 1274 * for each frag and bump the node reference count to 1275 * reflect the held reference to be setup by ath_tx_start. 1276 */ 1277 static int 1278 ath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags, 1279 struct mbuf *m0, struct ieee80211_node *ni) 1280 { 1281 struct mbuf *m; 1282 struct ath_buf *bf; 1283 1284 ATH_TXBUF_LOCK(sc); 1285 for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) { 1286 bf = STAILQ_FIRST(&sc->sc_txbuf); 1287 if (bf == NULL) { /* out of buffers, cleanup */ 1288 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: out of xmit buffers\n", 1289 __func__); 1290 sc->sc_if.if_flags |= IFF_OACTIVE; 1291 ath_txfrag_cleanup(sc, frags, ni); 1292 break; 1293 } 1294 STAILQ_REMOVE_HEAD(&sc->sc_txbuf, bf_list); 1295 ieee80211_node_incref(ni); 1296 STAILQ_INSERT_TAIL(frags, bf, bf_list); 1297 } 1298 ATH_TXBUF_UNLOCK(sc); 1299 1300 return !STAILQ_EMPTY(frags); 1301 } 1302 1303 static void 1304 ath_start(struct ifnet *ifp) 1305 { 1306 struct ath_softc *sc = ifp->if_softc; 1307 struct ath_hal *ah = sc->sc_ah; 1308 struct ieee80211com *ic = &sc->sc_ic; 1309 struct ieee80211_node *ni; 1310 struct ath_buf *bf; 1311 struct mbuf *m, *next; 1312 struct ieee80211_frame *wh; 1313 struct ether_header *eh; 1314 ath_bufhead frags; 1315 1316 if ((ifp->if_flags & IFF_RUNNING) == 0 || 1317 !device_is_active(sc->sc_dev)) 1318 return; 1319 1320 if (sc->sc_flags & ATH_KEY_UPDATING) 1321 return; 1322 1323 for (;;) { 1324 /* 1325 * Grab a TX buffer and associated resources. 1326 */ 1327 ATH_TXBUF_LOCK(sc); 1328 bf = STAILQ_FIRST(&sc->sc_txbuf); 1329 if (bf != NULL) 1330 STAILQ_REMOVE_HEAD(&sc->sc_txbuf, bf_list); 1331 ATH_TXBUF_UNLOCK(sc); 1332 if (bf == NULL) { 1333 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: out of xmit buffers\n", 1334 __func__); 1335 sc->sc_stats.ast_tx_qstop++; 1336 ifp->if_flags |= IFF_OACTIVE; 1337 break; 1338 } 1339 /* 1340 * Poll the management queue for frames; they 1341 * have priority over normal data frames. 1342 */ 1343 IF_DEQUEUE(&ic->ic_mgtq, m); 1344 if (m == NULL) { 1345 /* 1346 * No data frames go out unless we're associated. 1347 */ 1348 if (ic->ic_state != IEEE80211_S_RUN) { 1349 DPRINTF(sc, ATH_DEBUG_XMIT, 1350 "%s: discard data packet, state %s\n", 1351 __func__, 1352 ieee80211_state_name[ic->ic_state]); 1353 sc->sc_stats.ast_tx_discard++; 1354 ATH_TXBUF_LOCK(sc); 1355 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1356 ATH_TXBUF_UNLOCK(sc); 1357 break; 1358 } 1359 IFQ_DEQUEUE(&ifp->if_snd, m); /* XXX: LOCK */ 1360 if (m == NULL) { 1361 ATH_TXBUF_LOCK(sc); 1362 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1363 ATH_TXBUF_UNLOCK(sc); 1364 break; 1365 } 1366 STAILQ_INIT(&frags); 1367 /* 1368 * Find the node for the destination so we can do 1369 * things like power save and fast frames aggregation. 1370 */ 1371 if (m->m_len < sizeof(struct ether_header) && 1372 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 1373 ic->ic_stats.is_tx_nobuf++; /* XXX */ 1374 ni = NULL; 1375 goto bad; 1376 } 1377 eh = mtod(m, struct ether_header *); 1378 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 1379 if (ni == NULL) { 1380 /* NB: ieee80211_find_txnode does stat+msg */ 1381 m_freem(m); 1382 goto bad; 1383 } 1384 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1385 (m->m_flags & M_PWR_SAV) == 0) { 1386 /* 1387 * Station in power save mode; pass the frame 1388 * to the 802.11 layer and continue. We'll get 1389 * the frame back when the time is right. 1390 */ 1391 ieee80211_pwrsave(ic, ni, m); 1392 goto reclaim; 1393 } 1394 /* calculate priority so we can find the tx queue */ 1395 if (ieee80211_classify(ic, m, ni)) { 1396 DPRINTF(sc, ATH_DEBUG_XMIT, 1397 "%s: discard, classification failure\n", 1398 __func__); 1399 m_freem(m); 1400 goto bad; 1401 } 1402 ifp->if_opackets++; 1403 1404 bpf_mtap(ifp, m, BPF_D_OUT); 1405 /* 1406 * Encapsulate the packet in prep for transmission. 1407 */ 1408 m = ieee80211_encap(ic, m, ni); 1409 if (m == NULL) { 1410 DPRINTF(sc, ATH_DEBUG_XMIT, 1411 "%s: encapsulation failure\n", 1412 __func__); 1413 sc->sc_stats.ast_tx_encap++; 1414 goto bad; 1415 } 1416 /* 1417 * Check for fragmentation. If this has frame 1418 * has been broken up verify we have enough 1419 * buffers to send all the fragments so all 1420 * go out or none... 1421 */ 1422 if ((m->m_flags & M_FRAG) && 1423 !ath_txfrag_setup(sc, &frags, m, ni)) { 1424 DPRINTF(sc, ATH_DEBUG_ANY, 1425 "%s: out of txfrag buffers\n", __func__); 1426 ic->ic_stats.is_tx_nobuf++; /* XXX */ 1427 ath_freetx(m); 1428 goto bad; 1429 } 1430 } else { 1431 /* 1432 * Hack! The referenced node pointer is in the 1433 * rcvif field of the packet header. This is 1434 * placed there by ieee80211_mgmt_output because 1435 * we need to hold the reference with the frame 1436 * and there's no other way (other than packet 1437 * tags which we consider too expensive to use) 1438 * to pass it along. 1439 */ 1440 ni = M_GETCTX(m, struct ieee80211_node *); 1441 M_CLEARCTX(m); 1442 1443 wh = mtod(m, struct ieee80211_frame *); 1444 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1445 IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1446 /* fill time stamp */ 1447 u_int64_t tsf; 1448 u_int32_t *tstamp; 1449 1450 tsf = ath_hal_gettsf64(ah); 1451 /* XXX: adjust 100us delay to xmit */ 1452 tsf += 100; 1453 tstamp = (u_int32_t *)&wh[1]; 1454 tstamp[0] = htole32(tsf & 0xffffffff); 1455 tstamp[1] = htole32(tsf >> 32); 1456 } 1457 sc->sc_stats.ast_tx_mgmt++; 1458 } 1459 1460 nextfrag: 1461 next = m->m_nextpkt; 1462 if (ath_tx_start(sc, ni, bf, m)) { 1463 bad: 1464 ifp->if_oerrors++; 1465 reclaim: 1466 ATH_TXBUF_LOCK(sc); 1467 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 1468 ath_txfrag_cleanup(sc, &frags, ni); 1469 ATH_TXBUF_UNLOCK(sc); 1470 if (ni != NULL) 1471 ieee80211_free_node(ni); 1472 continue; 1473 } 1474 if (next != NULL) { 1475 m = next; 1476 bf = STAILQ_FIRST(&frags); 1477 KASSERTMSG(bf != NULL, "no buf for txfrag"); 1478 STAILQ_REMOVE_HEAD(&frags, bf_list); 1479 goto nextfrag; 1480 } 1481 1482 ifp->if_timer = 1; 1483 } 1484 } 1485 1486 static int 1487 ath_media_change(struct ifnet *ifp) 1488 { 1489 #define IS_UP(ifp) \ 1490 ((ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING)) 1491 int error; 1492 1493 error = ieee80211_media_change(ifp); 1494 if (error == ENETRESET) { 1495 if (IS_UP(ifp)) 1496 ath_init(ifp->if_softc); /* XXX lose error */ 1497 error = 0; 1498 } 1499 return error; 1500 #undef IS_UP 1501 } 1502 1503 #ifdef AR_DEBUG 1504 static void 1505 ath_keyprint(const char *tag, u_int ix, 1506 const HAL_KEYVAL *hk, const u_int8_t mac[IEEE80211_ADDR_LEN]) 1507 { 1508 static const char *ciphers[] = { 1509 "WEP", 1510 "AES-OCB", 1511 "AES-CCM", 1512 "CKIP", 1513 "TKIP", 1514 "CLR", 1515 }; 1516 int i, n; 1517 1518 printf("%s: [%02u] %-7s ", tag, ix, ciphers[hk->kv_type]); 1519 for (i = 0, n = hk->kv_len; i < n; i++) 1520 printf("%02x", hk->kv_val[i]); 1521 printf(" mac %s", ether_sprintf(mac)); 1522 if (hk->kv_type == HAL_CIPHER_TKIP) { 1523 printf(" mic "); 1524 for (i = 0; i < sizeof(hk->kv_mic); i++) 1525 printf("%02x", hk->kv_mic[i]); 1526 } 1527 printf("\n"); 1528 } 1529 #endif 1530 1531 /* 1532 * Set a TKIP key into the hardware. This handles the 1533 * potential distribution of key state to multiple key 1534 * cache slots for TKIP. 1535 */ 1536 static int 1537 ath_keyset_tkip(struct ath_softc *sc, const struct ieee80211_key *k, 1538 HAL_KEYVAL *hk, const u_int8_t mac[IEEE80211_ADDR_LEN]) 1539 { 1540 #define IEEE80211_KEY_XR (IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV) 1541 static const u_int8_t zerobssid[IEEE80211_ADDR_LEN]; 1542 struct ath_hal *ah = sc->sc_ah; 1543 1544 KASSERTMSG(k->wk_cipher->ic_cipher == IEEE80211_CIPHER_TKIP, 1545 "got a non-TKIP key, cipher %u", k->wk_cipher->ic_cipher); 1546 if ((k->wk_flags & IEEE80211_KEY_XR) == IEEE80211_KEY_XR) { 1547 if (sc->sc_splitmic) { 1548 /* 1549 * TX key goes at first index, RX key at the rx index. 1550 * The hal handles the MIC keys at index+64. 1551 */ 1552 memcpy(hk->kv_mic, k->wk_txmic, sizeof(hk->kv_mic)); 1553 KEYPRINTF(sc, k->wk_keyix, hk, zerobssid); 1554 if (!ath_hal_keyset(ah, ATH_KEY(k->wk_keyix), hk, 1555 zerobssid)) 1556 return 0; 1557 1558 memcpy(hk->kv_mic, k->wk_rxmic, sizeof(hk->kv_mic)); 1559 KEYPRINTF(sc, k->wk_keyix+32, hk, mac); 1560 /* XXX delete tx key on failure? */ 1561 return ath_hal_keyset(ah, ATH_KEY(k->wk_keyix+32), 1562 hk, mac); 1563 } else { 1564 /* 1565 * Room for both TX+RX MIC keys in one key cache 1566 * slot, just set key at the first index; the HAL 1567 * will handle the reset. 1568 */ 1569 memcpy(hk->kv_mic, k->wk_rxmic, sizeof(hk->kv_mic)); 1570 memcpy(hk->kv_txmic, k->wk_txmic, sizeof(hk->kv_txmic)); 1571 KEYPRINTF(sc, k->wk_keyix, hk, mac); 1572 return ath_hal_keyset(ah, ATH_KEY(k->wk_keyix), hk, mac); 1573 } 1574 } else if (k->wk_flags & IEEE80211_KEY_XMIT) { 1575 if (sc->sc_splitmic) { 1576 /* 1577 * NB: must pass MIC key in expected location when 1578 * the keycache only holds one MIC key per entry. 1579 */ 1580 memcpy(hk->kv_mic, k->wk_txmic, sizeof(hk->kv_txmic)); 1581 } else 1582 memcpy(hk->kv_txmic, k->wk_txmic, sizeof(hk->kv_txmic)); 1583 KEYPRINTF(sc, k->wk_keyix, hk, mac); 1584 return ath_hal_keyset(ah, ATH_KEY(k->wk_keyix), hk, mac); 1585 } else if (k->wk_flags & IEEE80211_KEY_RECV) { 1586 memcpy(hk->kv_mic, k->wk_rxmic, sizeof(hk->kv_mic)); 1587 KEYPRINTF(sc, k->wk_keyix, hk, mac); 1588 return ath_hal_keyset(ah, k->wk_keyix, hk, mac); 1589 } 1590 return 0; 1591 #undef IEEE80211_KEY_XR 1592 } 1593 1594 /* 1595 * Set a net80211 key into the hardware. This handles the 1596 * potential distribution of key state to multiple key 1597 * cache slots for TKIP with hardware MIC support. 1598 */ 1599 static int 1600 ath_keyset(struct ath_softc *sc, const struct ieee80211_key *k, 1601 const u_int8_t mac0[IEEE80211_ADDR_LEN], 1602 struct ieee80211_node *bss) 1603 { 1604 #define N(a) (sizeof(a)/sizeof(a[0])) 1605 static const u_int8_t ciphermap[] = { 1606 HAL_CIPHER_WEP, /* IEEE80211_CIPHER_WEP */ 1607 HAL_CIPHER_TKIP, /* IEEE80211_CIPHER_TKIP */ 1608 HAL_CIPHER_AES_OCB, /* IEEE80211_CIPHER_AES_OCB */ 1609 HAL_CIPHER_AES_CCM, /* IEEE80211_CIPHER_AES_CCM */ 1610 (u_int8_t) -1, /* 4 is not allocated */ 1611 HAL_CIPHER_CKIP, /* IEEE80211_CIPHER_CKIP */ 1612 HAL_CIPHER_CLR, /* IEEE80211_CIPHER_NONE */ 1613 }; 1614 struct ath_hal *ah = sc->sc_ah; 1615 const struct ieee80211_cipher *cip = k->wk_cipher; 1616 u_int8_t gmac[IEEE80211_ADDR_LEN]; 1617 const u_int8_t *mac; 1618 HAL_KEYVAL hk; 1619 1620 memset(&hk, 0, sizeof(hk)); 1621 /* 1622 * Software crypto uses a "clear key" so non-crypto 1623 * state kept in the key cache are maintained and 1624 * so that rx frames have an entry to match. 1625 */ 1626 if ((k->wk_flags & IEEE80211_KEY_SWCRYPT) == 0) { 1627 KASSERTMSG(cip->ic_cipher < N(ciphermap), 1628 "invalid cipher type %u", cip->ic_cipher); 1629 hk.kv_type = ciphermap[cip->ic_cipher]; 1630 hk.kv_len = k->wk_keylen; 1631 memcpy(hk.kv_val, k->wk_key, k->wk_keylen); 1632 } else 1633 hk.kv_type = HAL_CIPHER_CLR; 1634 1635 if ((k->wk_flags & IEEE80211_KEY_GROUP) && sc->sc_mcastkey) { 1636 /* 1637 * Group keys on hardware that supports multicast frame 1638 * key search use a mac that is the sender's address with 1639 * the high bit set instead of the app-specified address. 1640 */ 1641 IEEE80211_ADDR_COPY(gmac, bss->ni_macaddr); 1642 gmac[0] |= 0x80; 1643 mac = gmac; 1644 } else 1645 mac = mac0; 1646 1647 if ((hk.kv_type == HAL_CIPHER_TKIP && 1648 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0)) { 1649 return ath_keyset_tkip(sc, k, &hk, mac); 1650 } else { 1651 KEYPRINTF(sc, k->wk_keyix, &hk, mac); 1652 return ath_hal_keyset(ah, ATH_KEY(k->wk_keyix), &hk, mac); 1653 } 1654 #undef N 1655 } 1656 1657 /* 1658 * Allocate tx/rx key slots for TKIP. We allocate two slots for 1659 * each key, one for decrypt/encrypt and the other for the MIC. 1660 */ 1661 static u_int16_t 1662 key_alloc_2pair(struct ath_softc *sc, 1663 ieee80211_keyix *txkeyix, ieee80211_keyix *rxkeyix) 1664 { 1665 #define N(a) (sizeof(a)/sizeof(a[0])) 1666 u_int i, keyix; 1667 1668 KASSERTMSG(sc->sc_splitmic, "key cache !split"); 1669 /* XXX could optimize */ 1670 for (i = 0; i < N(sc->sc_keymap)/4; i++) { 1671 u_int8_t b = sc->sc_keymap[i]; 1672 if (b != 0xff) { 1673 /* 1674 * One or more slots in this byte are free. 1675 */ 1676 keyix = i*NBBY; 1677 while (b & 1) { 1678 again: 1679 keyix++; 1680 b >>= 1; 1681 } 1682 /* XXX IEEE80211_KEY_XMIT | IEEE80211_KEY_RECV */ 1683 if (isset(sc->sc_keymap, keyix+32) || 1684 isset(sc->sc_keymap, keyix+64) || 1685 isset(sc->sc_keymap, keyix+32+64)) { 1686 /* full pair unavailable */ 1687 /* XXX statistic */ 1688 if (keyix == (i+1)*NBBY) { 1689 /* no slots were appropriate, advance */ 1690 continue; 1691 } 1692 goto again; 1693 } 1694 setbit(sc->sc_keymap, keyix); 1695 setbit(sc->sc_keymap, keyix+64); 1696 setbit(sc->sc_keymap, keyix+32); 1697 setbit(sc->sc_keymap, keyix+32+64); 1698 DPRINTF(sc, ATH_DEBUG_KEYCACHE, 1699 "%s: key pair %u,%u %u,%u\n", 1700 __func__, keyix, keyix+64, 1701 keyix+32, keyix+32+64); 1702 *txkeyix = keyix; 1703 *rxkeyix = keyix+32; 1704 return keyix; 1705 } 1706 } 1707 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: out of pair space\n", __func__); 1708 return IEEE80211_KEYIX_NONE; 1709 #undef N 1710 } 1711 1712 /* 1713 * Allocate tx/rx key slots for TKIP. We allocate two slots for 1714 * each key, one for decrypt/encrypt and the other for the MIC. 1715 */ 1716 static int 1717 key_alloc_pair(struct ath_softc *sc, ieee80211_keyix *txkeyix, 1718 ieee80211_keyix *rxkeyix) 1719 { 1720 #define N(a) (sizeof(a)/sizeof(a[0])) 1721 u_int i, keyix; 1722 1723 KASSERTMSG(!sc->sc_splitmic, "key cache split"); 1724 /* XXX could optimize */ 1725 for (i = 0; i < N(sc->sc_keymap)/4; i++) { 1726 uint8_t b = sc->sc_keymap[i]; 1727 if (b != 0xff) { 1728 /* 1729 * One or more slots in this byte are free. 1730 */ 1731 keyix = i*NBBY; 1732 while (b & 1) { 1733 again: 1734 keyix++; 1735 b >>= 1; 1736 } 1737 if (isset(sc->sc_keymap, keyix+64)) { 1738 /* full pair unavailable */ 1739 /* XXX statistic */ 1740 if (keyix == (i+1)*NBBY) { 1741 /* no slots were appropriate, advance */ 1742 continue; 1743 } 1744 goto again; 1745 } 1746 setbit(sc->sc_keymap, keyix); 1747 setbit(sc->sc_keymap, keyix+64); 1748 DPRINTF(sc, ATH_DEBUG_KEYCACHE, 1749 "%s: key pair %u,%u\n", 1750 __func__, keyix, keyix+64); 1751 *txkeyix = *rxkeyix = keyix; 1752 return 1; 1753 } 1754 } 1755 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: out of pair space\n", __func__); 1756 return 0; 1757 #undef N 1758 } 1759 1760 /* 1761 * Allocate a single key cache slot. 1762 */ 1763 static int 1764 key_alloc_single(struct ath_softc *sc, 1765 ieee80211_keyix *txkeyix, ieee80211_keyix *rxkeyix) 1766 { 1767 #define N(a) (sizeof(a)/sizeof(a[0])) 1768 u_int i, keyix; 1769 1770 /* XXX try i,i+32,i+64,i+32+64 to minimize key pair conflicts */ 1771 for (i = 0; i < N(sc->sc_keymap); i++) { 1772 u_int8_t b = sc->sc_keymap[i]; 1773 if (b != 0xff) { 1774 /* 1775 * One or more slots are free. 1776 */ 1777 keyix = i*NBBY; 1778 while (b & 1) 1779 keyix++, b >>= 1; 1780 setbit(sc->sc_keymap, keyix); 1781 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: key %u\n", 1782 __func__, keyix); 1783 *txkeyix = *rxkeyix = keyix; 1784 return 1; 1785 } 1786 } 1787 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: out of space\n", __func__); 1788 return 0; 1789 #undef N 1790 } 1791 1792 /* 1793 * Allocate one or more key cache slots for a uniacst key. The 1794 * key itself is needed only to identify the cipher. For hardware 1795 * TKIP with split cipher+MIC keys we allocate two key cache slot 1796 * pairs so that we can setup separate TX and RX MIC keys. Note 1797 * that the MIC key for a TKIP key at slot i is assumed by the 1798 * hardware to be at slot i+64. This limits TKIP keys to the first 1799 * 64 entries. 1800 */ 1801 static int 1802 ath_key_alloc(struct ieee80211com *ic, const struct ieee80211_key *k, 1803 ieee80211_keyix *keyix, ieee80211_keyix *rxkeyix) 1804 { 1805 struct ath_softc *sc = ic->ic_ifp->if_softc; 1806 1807 /* 1808 * Group key allocation must be handled specially for 1809 * parts that do not support multicast key cache search 1810 * functionality. For those parts the key id must match 1811 * the h/w key index so lookups find the right key. On 1812 * parts w/ the key search facility we install the sender's 1813 * mac address (with the high bit set) and let the hardware 1814 * find the key w/o using the key id. This is preferred as 1815 * it permits us to support multiple users for adhoc and/or 1816 * multi-station operation. 1817 */ 1818 if ((k->wk_flags & IEEE80211_KEY_GROUP) && !sc->sc_mcastkey) { 1819 if (!(&ic->ic_nw_keys[0] <= k && 1820 k < &ic->ic_nw_keys[IEEE80211_WEP_NKID])) { 1821 /* should not happen */ 1822 DPRINTF(sc, ATH_DEBUG_KEYCACHE, 1823 "%s: bogus group key\n", __func__); 1824 return 0; 1825 } 1826 /* 1827 * XXX we pre-allocate the global keys so 1828 * have no way to check if they've already been allocated. 1829 */ 1830 *keyix = *rxkeyix = k - ic->ic_nw_keys; 1831 return 1; 1832 } 1833 1834 /* 1835 * We allocate two pair for TKIP when using the h/w to do 1836 * the MIC. For everything else, including software crypto, 1837 * we allocate a single entry. Note that s/w crypto requires 1838 * a pass-through slot on the 5211 and 5212. The 5210 does 1839 * not support pass-through cache entries and we map all 1840 * those requests to slot 0. 1841 */ 1842 if (k->wk_flags & IEEE80211_KEY_SWCRYPT) { 1843 return key_alloc_single(sc, keyix, rxkeyix); 1844 } else if (k->wk_cipher->ic_cipher == IEEE80211_CIPHER_TKIP && 1845 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0) { 1846 if (sc->sc_splitmic) 1847 return key_alloc_2pair(sc, keyix, rxkeyix); 1848 else 1849 return key_alloc_pair(sc, keyix, rxkeyix); 1850 } else { 1851 return key_alloc_single(sc, keyix, rxkeyix); 1852 } 1853 } 1854 1855 /* 1856 * Delete an entry in the key cache allocated by ath_key_alloc. 1857 */ 1858 static int 1859 ath_key_delete(struct ieee80211com *ic, const struct ieee80211_key *k) 1860 { 1861 struct ath_softc *sc = ic->ic_ifp->if_softc; 1862 struct ath_hal *ah = sc->sc_ah; 1863 const struct ieee80211_cipher *cip = k->wk_cipher; 1864 u_int keyix = k->wk_keyix; 1865 1866 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s: delete key %u\n", __func__, keyix); 1867 1868 if (!device_has_power(sc->sc_dev)) { 1869 aprint_error_dev(sc->sc_dev, "deleting keyix %d w/o power\n", 1870 k->wk_keyix); 1871 } 1872 1873 ath_hal_keyreset(ah, keyix); 1874 /* 1875 * Handle split tx/rx keying required for TKIP with h/w MIC. 1876 */ 1877 if (cip->ic_cipher == IEEE80211_CIPHER_TKIP && 1878 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && sc->sc_splitmic) 1879 ath_hal_keyreset(ah, keyix+32); /* RX key */ 1880 if (keyix >= IEEE80211_WEP_NKID) { 1881 /* 1882 * Don't touch keymap entries for global keys so 1883 * they are never considered for dynamic allocation. 1884 */ 1885 clrbit(sc->sc_keymap, keyix); 1886 if (cip->ic_cipher == IEEE80211_CIPHER_TKIP && 1887 (k->wk_flags & IEEE80211_KEY_SWMIC) == 0) { 1888 clrbit(sc->sc_keymap, keyix+64); /* TX key MIC */ 1889 if (sc->sc_splitmic) { 1890 /* +32 for RX key, +32+64 for RX key MIC */ 1891 clrbit(sc->sc_keymap, keyix+32); 1892 clrbit(sc->sc_keymap, keyix+32+64); 1893 } 1894 } 1895 } 1896 return 1; 1897 } 1898 1899 /* 1900 * Set the key cache contents for the specified key. Key cache 1901 * slot(s) must already have been allocated by ath_key_alloc. 1902 */ 1903 static int 1904 ath_key_set(struct ieee80211com *ic, const struct ieee80211_key *k, 1905 const u_int8_t mac[IEEE80211_ADDR_LEN]) 1906 { 1907 struct ath_softc *sc = ic->ic_ifp->if_softc; 1908 1909 if (!device_has_power(sc->sc_dev)) { 1910 aprint_error_dev(sc->sc_dev, "setting keyix %d w/o power\n", 1911 k->wk_keyix); 1912 } 1913 return ath_keyset(sc, k, mac, ic->ic_bss); 1914 } 1915 1916 /* 1917 * Block/unblock tx+rx processing while a key change is done. 1918 * We assume the caller serializes key management operations 1919 * so we only need to worry about synchronization with other 1920 * uses that originate in the driver. 1921 */ 1922 static void 1923 ath_key_update_begin(struct ieee80211com *ic) 1924 { 1925 struct ifnet *ifp = ic->ic_ifp; 1926 struct ath_softc *sc = ifp->if_softc; 1927 1928 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 1929 #if 0 1930 tasklet_disable(&sc->sc_rxtq); 1931 #endif 1932 sc->sc_flags |= ATH_KEY_UPDATING; 1933 } 1934 1935 static void 1936 ath_key_update_end(struct ieee80211com *ic) 1937 { 1938 struct ifnet *ifp = ic->ic_ifp; 1939 struct ath_softc *sc = ifp->if_softc; 1940 1941 DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__); 1942 sc->sc_flags &= ~ATH_KEY_UPDATING; 1943 #if 0 1944 tasklet_enable(&sc->sc_rxtq); 1945 #endif 1946 } 1947 1948 /* 1949 * Calculate the receive filter according to the 1950 * operating mode and state: 1951 * 1952 * o always accept unicast, broadcast, and multicast traffic 1953 * o maintain current state of phy error reception (the hal 1954 * may enable phy error frames for noise immunity work) 1955 * o probe request frames are accepted only when operating in 1956 * hostap, adhoc, or monitor modes 1957 * o enable promiscuous mode according to the interface state 1958 * o accept beacons: 1959 * - when operating in adhoc mode so the 802.11 layer creates 1960 * node table entries for peers, 1961 * - when operating in station mode for collecting rssi data when 1962 * the station is otherwise quiet, or 1963 * - when scanning 1964 */ 1965 static u_int32_t 1966 ath_calcrxfilter(struct ath_softc *sc, enum ieee80211_state state) 1967 { 1968 struct ieee80211com *ic = &sc->sc_ic; 1969 struct ath_hal *ah = sc->sc_ah; 1970 struct ifnet *ifp = &sc->sc_if; 1971 u_int32_t rfilt; 1972 1973 rfilt = (ath_hal_getrxfilter(ah) & HAL_RX_FILTER_PHYERR) 1974 | HAL_RX_FILTER_UCAST | HAL_RX_FILTER_BCAST | HAL_RX_FILTER_MCAST; 1975 if (ic->ic_opmode != IEEE80211_M_STA) 1976 rfilt |= HAL_RX_FILTER_PROBEREQ; 1977 if (ic->ic_opmode != IEEE80211_M_HOSTAP && 1978 (ifp->if_flags & IFF_PROMISC)) 1979 rfilt |= HAL_RX_FILTER_PROM; 1980 if (ifp->if_flags & IFF_PROMISC) 1981 rfilt |= HAL_RX_FILTER_CONTROL | HAL_RX_FILTER_PROBEREQ; 1982 if (ic->ic_opmode == IEEE80211_M_STA || 1983 ic->ic_opmode == IEEE80211_M_IBSS || 1984 state == IEEE80211_S_SCAN) 1985 rfilt |= HAL_RX_FILTER_BEACON; 1986 return rfilt; 1987 } 1988 1989 static void 1990 ath_mode_init(struct ath_softc *sc) 1991 { 1992 struct ethercom *ec = &sc->sc_ec; 1993 struct ifnet *ifp = &sc->sc_if; 1994 struct ieee80211com *ic = &sc->sc_ic; 1995 struct ath_hal *ah = sc->sc_ah; 1996 struct ether_multi *enm; 1997 struct ether_multistep estep; 1998 u_int32_t rfilt, mfilt[2], val; 1999 int i; 2000 uint8_t pos; 2001 2002 /* configure rx filter */ 2003 rfilt = ath_calcrxfilter(sc, ic->ic_state); 2004 ath_hal_setrxfilter(ah, rfilt); 2005 2006 /* configure operational mode */ 2007 ath_hal_setopmode(ah); 2008 2009 /* Write keys to hardware; it may have been powered down. */ 2010 ath_key_update_begin(ic); 2011 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 2012 ath_key_set(ic, 2013 &ic->ic_crypto.cs_nw_keys[i], 2014 ic->ic_myaddr); 2015 } 2016 ath_key_update_end(ic); 2017 2018 /* 2019 * Handle any link-level address change. Note that we only 2020 * need to force ic_myaddr; any other addresses are handled 2021 * as a byproduct of the ifnet code marking the interface 2022 * down then up. 2023 * 2024 * XXX should get from lladdr instead of arpcom but that's more work 2025 */ 2026 IEEE80211_ADDR_COPY(ic->ic_myaddr, CLLADDR(sc->sc_if.if_sadl)); 2027 ath_hal_setmac(ah, ic->ic_myaddr); 2028 2029 /* calculate and install multicast filter */ 2030 ifp->if_flags &= ~IFF_ALLMULTI; 2031 mfilt[0] = mfilt[1] = 0; 2032 ETHER_LOCK(ec); 2033 ETHER_FIRST_MULTI(estep, ec, enm); 2034 while (enm != NULL) { 2035 void *dl; 2036 /* XXX Punt on ranges. */ 2037 if (!IEEE80211_ADDR_EQ(enm->enm_addrlo, enm->enm_addrhi)) { 2038 mfilt[0] = mfilt[1] = 0xffffffff; 2039 ifp->if_flags |= IFF_ALLMULTI; 2040 break; 2041 } 2042 dl = enm->enm_addrlo; 2043 val = LE_READ_4((char *)dl + 0); 2044 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 2045 val = LE_READ_4((char *)dl + 3); 2046 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; 2047 pos &= 0x3f; 2048 mfilt[pos / 32] |= (1 << (pos % 32)); 2049 2050 ETHER_NEXT_MULTI(estep, enm); 2051 } 2052 ETHER_UNLOCK(ec); 2053 2054 ath_hal_setmcastfilter(ah, mfilt[0], mfilt[1]); 2055 DPRINTF(sc, ATH_DEBUG_MODE, "%s: RX filter 0x%x, MC filter %08x:%08x\n", 2056 __func__, rfilt, mfilt[0], mfilt[1]); 2057 } 2058 2059 /* 2060 * Set the slot time based on the current setting. 2061 */ 2062 static void 2063 ath_setslottime(struct ath_softc *sc) 2064 { 2065 struct ieee80211com *ic = &sc->sc_ic; 2066 struct ath_hal *ah = sc->sc_ah; 2067 2068 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2069 ath_hal_setslottime(ah, HAL_SLOT_TIME_9); 2070 else 2071 ath_hal_setslottime(ah, HAL_SLOT_TIME_20); 2072 sc->sc_updateslot = OK; 2073 } 2074 2075 /* 2076 * Callback from the 802.11 layer to update the 2077 * slot time based on the current setting. 2078 */ 2079 static void 2080 ath_updateslot(struct ifnet *ifp) 2081 { 2082 struct ath_softc *sc = ifp->if_softc; 2083 struct ieee80211com *ic = &sc->sc_ic; 2084 2085 /* 2086 * When not coordinating the BSS, change the hardware 2087 * immediately. For other operation we defer the change 2088 * until beacon updates have propagated to the stations. 2089 */ 2090 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 2091 sc->sc_updateslot = UPDATE; 2092 else 2093 ath_setslottime(sc); 2094 } 2095 2096 /* 2097 * Setup a h/w transmit queue for beacons. 2098 */ 2099 static int 2100 ath_beaconq_setup(struct ath_hal *ah) 2101 { 2102 HAL_TXQ_INFO qi; 2103 2104 memset(&qi, 0, sizeof(qi)); 2105 qi.tqi_aifs = HAL_TXQ_USEDEFAULT; 2106 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; 2107 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; 2108 /* NB: for dynamic turbo, don't enable any other interrupts */ 2109 qi.tqi_qflags = HAL_TXQ_TXDESCINT_ENABLE; 2110 return ath_hal_setuptxqueue(ah, HAL_TX_QUEUE_BEACON, &qi); 2111 } 2112 2113 /* 2114 * Setup the transmit queue parameters for the beacon queue. 2115 */ 2116 static int 2117 ath_beaconq_config(struct ath_softc *sc) 2118 { 2119 #define ATH_EXPONENT_TO_VALUE(v) ((1<<(v))-1) 2120 struct ieee80211com *ic = &sc->sc_ic; 2121 struct ath_hal *ah = sc->sc_ah; 2122 HAL_TXQ_INFO qi; 2123 2124 ath_hal_gettxqueueprops(ah, sc->sc_bhalq, &qi); 2125 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 2126 /* 2127 * Always burst out beacon and CAB traffic. 2128 */ 2129 qi.tqi_aifs = ATH_BEACON_AIFS_DEFAULT; 2130 qi.tqi_cwmin = ATH_BEACON_CWMIN_DEFAULT; 2131 qi.tqi_cwmax = ATH_BEACON_CWMAX_DEFAULT; 2132 } else { 2133 struct wmeParams *wmep = 2134 &ic->ic_wme.wme_chanParams.cap_wmeParams[WME_AC_BE]; 2135 /* 2136 * Adhoc mode; important thing is to use 2x cwmin. 2137 */ 2138 qi.tqi_aifs = wmep->wmep_aifsn; 2139 qi.tqi_cwmin = 2*ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); 2140 qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); 2141 } 2142 2143 if (!ath_hal_settxqueueprops(ah, sc->sc_bhalq, &qi)) { 2144 device_printf(sc->sc_dev, "unable to update parameters for " 2145 "beacon hardware queue!\n"); 2146 return 0; 2147 } else { 2148 ath_hal_resettxqueue(ah, sc->sc_bhalq); /* push to h/w */ 2149 return 1; 2150 } 2151 #undef ATH_EXPONENT_TO_VALUE 2152 } 2153 2154 /* 2155 * Allocate and setup an initial beacon frame. 2156 */ 2157 static int 2158 ath_beacon_alloc(struct ath_softc *sc, struct ieee80211_node *ni) 2159 { 2160 struct ieee80211com *ic = ni->ni_ic; 2161 struct ath_buf *bf; 2162 struct mbuf *m; 2163 int error; 2164 2165 bf = STAILQ_FIRST(&sc->sc_bbuf); 2166 if (bf == NULL) { 2167 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: no dma buffers\n", __func__); 2168 sc->sc_stats.ast_be_nombuf++; /* XXX */ 2169 return ENOMEM; /* XXX */ 2170 } 2171 /* 2172 * NB: the beacon data buffer must be 32-bit aligned; 2173 * we assume the mbuf routines will return us something 2174 * with this alignment (perhaps should assert). 2175 */ 2176 m = ieee80211_beacon_alloc(ic, ni, &sc->sc_boff); 2177 if (m == NULL) { 2178 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: cannot get mbuf\n", 2179 __func__); 2180 sc->sc_stats.ast_be_nombuf++; 2181 return ENOMEM; 2182 } 2183 error = bus_dmamap_load_mbuf(sc->sc_dmat, bf->bf_dmamap, m, 2184 BUS_DMA_NOWAIT); 2185 if (error == 0) { 2186 bf->bf_m = m; 2187 bf->bf_node = ieee80211_ref_node(ni); 2188 } else { 2189 m_freem(m); 2190 } 2191 return error; 2192 } 2193 2194 /* 2195 * Setup the beacon frame for transmit. 2196 */ 2197 static void 2198 ath_beacon_setup(struct ath_softc *sc, struct ath_buf *bf) 2199 { 2200 #define USE_SHPREAMBLE(_ic) \ 2201 (((_ic)->ic_flags & (IEEE80211_F_SHPREAMBLE | IEEE80211_F_USEBARKER))\ 2202 == IEEE80211_F_SHPREAMBLE) 2203 struct ieee80211_node *ni = bf->bf_node; 2204 struct ieee80211com *ic = ni->ni_ic; 2205 struct mbuf *m = bf->bf_m; 2206 struct ath_hal *ah = sc->sc_ah; 2207 struct ath_desc *ds; 2208 int flags, antenna; 2209 const HAL_RATE_TABLE *rt; 2210 u_int8_t rix, rate; 2211 2212 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: m %p len %u\n", 2213 __func__, m, m->m_len); 2214 2215 /* setup descriptors */ 2216 ds = bf->bf_desc; 2217 2218 flags = HAL_TXDESC_NOACK; 2219 if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) { 2220 ds->ds_link = HTOAH32(bf->bf_daddr); /* self-linked */ 2221 flags |= HAL_TXDESC_VEOL; 2222 /* 2223 * Let hardware handle antenna switching unless 2224 * the user has selected a transmit antenna 2225 * (sc_txantenna is not 0). 2226 */ 2227 antenna = sc->sc_txantenna; 2228 } else { 2229 ds->ds_link = 0; 2230 /* 2231 * Switch antenna every 4 beacons, unless the user 2232 * has selected a transmit antenna (sc_txantenna 2233 * is not 0). 2234 * 2235 * XXX assumes two antenna 2236 */ 2237 if (sc->sc_txantenna == 0) 2238 antenna = (sc->sc_stats.ast_be_xmit & 4 ? 2 : 1); 2239 else 2240 antenna = sc->sc_txantenna; 2241 } 2242 2243 KASSERTMSG(bf->bf_nseg == 1, 2244 "multi-segment beacon frame; nseg %u", bf->bf_nseg); 2245 ds->ds_data = bf->bf_segs[0].ds_addr; 2246 /* 2247 * Calculate rate code. 2248 * XXX everything at min xmit rate 2249 */ 2250 rix = sc->sc_minrateix; 2251 rt = sc->sc_currates; 2252 rate = rt->info[rix].rateCode; 2253 if (USE_SHPREAMBLE(ic)) 2254 rate |= rt->info[rix].shortPreamble; 2255 ath_hal_setuptxdesc(ah, ds 2256 , m->m_len + IEEE80211_CRC_LEN /* frame length */ 2257 , sizeof(struct ieee80211_frame)/* header length */ 2258 , HAL_PKT_TYPE_BEACON /* Atheros packet type */ 2259 , ni->ni_txpower /* txpower XXX */ 2260 , rate, 1 /* series 0 rate/tries */ 2261 , HAL_TXKEYIX_INVALID /* no encryption */ 2262 , antenna /* antenna mode */ 2263 , flags /* no ack, veol for beacons */ 2264 , 0 /* rts/cts rate */ 2265 , 0 /* rts/cts duration */ 2266 ); 2267 /* NB: beacon's BufLen must be a multiple of 4 bytes */ 2268 ath_hal_filltxdesc(ah, ds 2269 , roundup(m->m_len, 4) /* buffer length */ 2270 , AH_TRUE /* first segment */ 2271 , AH_TRUE /* last segment */ 2272 , ds /* first descriptor */ 2273 ); 2274 2275 /* NB: The desc swap function becomes void, if descriptor swapping 2276 * is not enabled 2277 */ 2278 ath_desc_swap(ds); 2279 2280 #undef USE_SHPREAMBLE 2281 } 2282 2283 /* 2284 * Transmit a beacon frame at SWBA. Dynamic updates to the 2285 * frame contents are done as needed and the slot time is 2286 * also adjusted based on current state. 2287 */ 2288 static void 2289 ath_beacon_proc(void *arg, int pending) 2290 { 2291 struct ath_softc *sc = arg; 2292 struct ath_buf *bf = STAILQ_FIRST(&sc->sc_bbuf); 2293 struct ieee80211_node *ni = bf->bf_node; 2294 struct ieee80211com *ic = ni->ni_ic; 2295 struct ath_hal *ah = sc->sc_ah; 2296 struct mbuf *m; 2297 int ncabq, error, otherant; 2298 2299 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, "%s: pending %u\n", 2300 __func__, pending); 2301 2302 if (ic->ic_opmode == IEEE80211_M_STA || 2303 ic->ic_opmode == IEEE80211_M_MONITOR || 2304 bf == NULL || bf->bf_m == NULL) { 2305 DPRINTF(sc, ATH_DEBUG_ANY, "%s: ic_flags=%x bf=%p bf_m=%p\n", 2306 __func__, ic->ic_flags, bf, bf ? bf->bf_m : NULL); 2307 return; 2308 } 2309 /* 2310 * Check if the previous beacon has gone out. If 2311 * not don't try to post another, skip this period 2312 * and wait for the next. Missed beacons indicate 2313 * a problem and should not occur. If we miss too 2314 * many consecutive beacons reset the device. 2315 */ 2316 if (ath_hal_numtxpending(ah, sc->sc_bhalq) != 0) { 2317 sc->sc_bmisscount++; 2318 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, 2319 "%s: missed %u consecutive beacons\n", 2320 __func__, sc->sc_bmisscount); 2321 if (sc->sc_bmisscount > 3) /* NB: 3 is a guess */ 2322 TASK_RUN_OR_ENQUEUE(&sc->sc_bstucktask); 2323 return; 2324 } 2325 if (sc->sc_bmisscount != 0) { 2326 DPRINTF(sc, ATH_DEBUG_BEACON, 2327 "%s: resume beacon xmit after %u misses\n", 2328 __func__, sc->sc_bmisscount); 2329 sc->sc_bmisscount = 0; 2330 } 2331 2332 /* 2333 * Update dynamic beacon contents. If this returns 2334 * non-zero then we need to remap the memory because 2335 * the beacon frame changed size (probably because 2336 * of the TIM bitmap). 2337 */ 2338 m = bf->bf_m; 2339 ncabq = ath_hal_numtxpending(ah, sc->sc_cabq->axq_qnum); 2340 if (ieee80211_beacon_update(ic, bf->bf_node, &sc->sc_boff, m, ncabq)) { 2341 /* XXX too conservative? */ 2342 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 2343 error = bus_dmamap_load_mbuf(sc->sc_dmat, bf->bf_dmamap, m, 2344 BUS_DMA_NOWAIT); 2345 if (error != 0) { 2346 if_printf(&sc->sc_if, 2347 "%s: bus_dmamap_load_mbuf failed, error %u\n", 2348 __func__, error); 2349 return; 2350 } 2351 } 2352 2353 /* 2354 * Handle slot time change when a non-ERP station joins/leaves 2355 * an 11g network. The 802.11 layer notifies us via callback, 2356 * we mark updateslot, then wait one beacon before effecting 2357 * the change. This gives associated stations at least one 2358 * beacon interval to note the state change. 2359 */ 2360 /* XXX locking */ 2361 if (sc->sc_updateslot == UPDATE) 2362 sc->sc_updateslot = COMMIT; /* commit next beacon */ 2363 else if (sc->sc_updateslot == COMMIT) 2364 ath_setslottime(sc); /* commit change to h/w */ 2365 2366 /* 2367 * Check recent per-antenna transmit statistics and flip 2368 * the default antenna if noticeably more frames went out 2369 * on the non-default antenna. 2370 * XXX assumes 2 anntenae 2371 */ 2372 otherant = sc->sc_defant & 1 ? 2 : 1; 2373 if (sc->sc_ant_tx[otherant] > sc->sc_ant_tx[sc->sc_defant] + 2) 2374 ath_setdefantenna(sc, otherant); 2375 sc->sc_ant_tx[1] = sc->sc_ant_tx[2] = 0; 2376 2377 /* 2378 * Construct tx descriptor. 2379 */ 2380 ath_beacon_setup(sc, bf); 2381 2382 /* 2383 * Stop any current dma and put the new frame on the queue. 2384 * This should never fail since we check above that no frames 2385 * are still pending on the queue. 2386 */ 2387 if (!ath_hal_stoptxdma(ah, sc->sc_bhalq)) { 2388 DPRINTF(sc, ATH_DEBUG_ANY, 2389 "%s: beacon queue %u did not stop?\n", 2390 __func__, sc->sc_bhalq); 2391 } 2392 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 0, 2393 bf->bf_dmamap->dm_mapsize, BUS_DMASYNC_PREWRITE); 2394 2395 /* 2396 * Enable the CAB queue before the beacon queue to 2397 * insure cab frames are triggered by this beacon. 2398 */ 2399 if (ncabq != 0 && (sc->sc_boff.bo_tim[4] & 1)) /* NB: only at DTIM */ 2400 ath_hal_txstart(ah, sc->sc_cabq->axq_qnum); 2401 ath_hal_puttxbuf(ah, sc->sc_bhalq, bf->bf_daddr); 2402 ath_hal_txstart(ah, sc->sc_bhalq); 2403 DPRINTF(sc, ATH_DEBUG_BEACON_PROC, 2404 "%s: TXDP[%u] = %" PRIx64 " (%p)\n", __func__, 2405 sc->sc_bhalq, (uint64_t)bf->bf_daddr, bf->bf_desc); 2406 2407 sc->sc_stats.ast_be_xmit++; 2408 } 2409 2410 /* 2411 * Reset the hardware after detecting beacons have stopped. 2412 */ 2413 static void 2414 ath_bstuck_proc(void *arg, int pending) 2415 { 2416 struct ath_softc *sc = arg; 2417 struct ifnet *ifp = &sc->sc_if; 2418 #ifdef __NetBSD__ 2419 int s; 2420 #endif 2421 2422 if_printf(ifp, "stuck beacon; resetting (bmiss count %u)\n", 2423 sc->sc_bmisscount); 2424 #ifdef __NetBSD__ 2425 s = splnet(); 2426 #endif 2427 ath_reset(ifp); 2428 #ifdef __NetBSD__ 2429 splx(s); 2430 #endif 2431 } 2432 2433 /* 2434 * Reclaim beacon resources. 2435 */ 2436 static void 2437 ath_beacon_free(struct ath_softc *sc) 2438 { 2439 struct ath_buf *bf; 2440 2441 STAILQ_FOREACH(bf, &sc->sc_bbuf, bf_list) { 2442 if (bf->bf_m != NULL) { 2443 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 2444 m_freem(bf->bf_m); 2445 bf->bf_m = NULL; 2446 } 2447 if (bf->bf_node != NULL) { 2448 ieee80211_free_node(bf->bf_node); 2449 bf->bf_node = NULL; 2450 } 2451 } 2452 } 2453 2454 /* 2455 * Configure the beacon and sleep timers. 2456 * 2457 * When operating as an AP this resets the TSF and sets 2458 * up the hardware to notify us when we need to issue beacons. 2459 * 2460 * When operating in station mode this sets up the beacon 2461 * timers according to the timestamp of the last received 2462 * beacon and the current TSF, configures PCF and DTIM 2463 * handling, programs the sleep registers so the hardware 2464 * will wakeup in time to receive beacons, and configures 2465 * the beacon miss handling so we'll receive a BMISS 2466 * interrupt when we stop seeing beacons from the AP 2467 * we've associated with. 2468 */ 2469 static void 2470 ath_beacon_config(struct ath_softc *sc) 2471 { 2472 #define TSF_TO_TU(_h,_l) \ 2473 ((((u_int32_t)(_h)) << 22) | (((u_int32_t)(_l)) >> 10)) 2474 #define FUDGE 2 2475 struct ath_hal *ah = sc->sc_ah; 2476 struct ieee80211com *ic = &sc->sc_ic; 2477 struct ieee80211_node *ni = ic->ic_bss; 2478 u_int32_t nexttbtt, intval, tsftu; 2479 u_int64_t tsf; 2480 2481 /* extract tstamp from last beacon and convert to TU */ 2482 nexttbtt = TSF_TO_TU(LE_READ_4(ni->ni_tstamp.data + 4), 2483 LE_READ_4(ni->ni_tstamp.data)); 2484 /* NB: the beacon interval is kept internally in TU's */ 2485 intval = ni->ni_intval & HAL_BEACON_PERIOD; 2486 if (nexttbtt == 0) /* e.g. for ap mode */ 2487 nexttbtt = intval; 2488 else if (intval) /* NB: can be 0 for monitor mode */ 2489 nexttbtt = roundup(nexttbtt, intval); 2490 DPRINTF(sc, ATH_DEBUG_BEACON, "%s: nexttbtt %u intval %u (%u)\n", 2491 __func__, nexttbtt, intval, ni->ni_intval); 2492 if (ic->ic_opmode == IEEE80211_M_STA) { 2493 HAL_BEACON_STATE bs; 2494 int dtimperiod, dtimcount; 2495 int cfpperiod, cfpcount; 2496 2497 /* 2498 * Setup dtim and cfp parameters according to 2499 * last beacon we received (which may be none). 2500 */ 2501 dtimperiod = ni->ni_dtim_period; 2502 if (dtimperiod <= 0) /* NB: 0 if not known */ 2503 dtimperiod = 1; 2504 dtimcount = ni->ni_dtim_count; 2505 if (dtimcount >= dtimperiod) /* NB: sanity check */ 2506 dtimcount = 0; /* XXX? */ 2507 cfpperiod = 1; /* NB: no PCF support yet */ 2508 cfpcount = 0; 2509 /* 2510 * Pull nexttbtt forward to reflect the current 2511 * TSF and calculate dtim+cfp state for the result. 2512 */ 2513 tsf = ath_hal_gettsf64(ah); 2514 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE; 2515 do { 2516 nexttbtt += intval; 2517 if (--dtimcount < 0) { 2518 dtimcount = dtimperiod - 1; 2519 if (--cfpcount < 0) 2520 cfpcount = cfpperiod - 1; 2521 } 2522 } while (nexttbtt < tsftu); 2523 memset(&bs, 0, sizeof(bs)); 2524 bs.bs_intval = intval; 2525 bs.bs_nexttbtt = nexttbtt; 2526 bs.bs_dtimperiod = dtimperiod*intval; 2527 bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval; 2528 bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod; 2529 bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod; 2530 bs.bs_cfpmaxduration = 0; 2531 #if 0 2532 /* 2533 * The 802.11 layer records the offset to the DTIM 2534 * bitmap while receiving beacons; use it here to 2535 * enable h/w detection of our AID being marked in 2536 * the bitmap vector (to indicate frames for us are 2537 * pending at the AP). 2538 * XXX do DTIM handling in s/w to WAR old h/w bugs 2539 * XXX enable based on h/w rev for newer chips 2540 */ 2541 bs.bs_timoffset = ni->ni_timoff; 2542 #endif 2543 /* 2544 * Calculate the number of consecutive beacons to miss 2545 * before taking a BMISS interrupt. The configuration 2546 * is specified in ms, so we need to convert that to 2547 * TU's and then calculate based on the beacon interval. 2548 * Note that we clamp the result to at most 10 beacons. 2549 */ 2550 bs.bs_bmissthreshold = howmany(ic->ic_bmisstimeout, intval); 2551 if (bs.bs_bmissthreshold > 10) 2552 bs.bs_bmissthreshold = 10; 2553 else if (bs.bs_bmissthreshold <= 0) 2554 bs.bs_bmissthreshold = 1; 2555 2556 /* 2557 * Calculate sleep duration. The configuration is 2558 * given in ms. We insure a multiple of the beacon 2559 * period is used. Also, if the sleep duration is 2560 * greater than the DTIM period then it makes senses 2561 * to make it a multiple of that. 2562 * 2563 * XXX fixed at 100ms 2564 */ 2565 bs.bs_sleepduration = 2566 roundup(IEEE80211_MS_TO_TU(100), bs.bs_intval); 2567 if (bs.bs_sleepduration > bs.bs_dtimperiod) 2568 bs.bs_sleepduration = roundup(bs.bs_sleepduration, bs.bs_dtimperiod); 2569 2570 DPRINTF(sc, ATH_DEBUG_BEACON, 2571 "%s: tsf %ju tsf:tu %u intval %u nexttbtt %u dtim %u nextdtim %u bmiss %u sleep %u cfp:period %u maxdur %u next %u timoffset %u\n" 2572 , __func__ 2573 , tsf, tsftu 2574 , bs.bs_intval 2575 , bs.bs_nexttbtt 2576 , bs.bs_dtimperiod 2577 , bs.bs_nextdtim 2578 , bs.bs_bmissthreshold 2579 , bs.bs_sleepduration 2580 , bs.bs_cfpperiod 2581 , bs.bs_cfpmaxduration 2582 , bs.bs_cfpnext 2583 , bs.bs_timoffset 2584 ); 2585 ath_hal_intrset(ah, 0); 2586 ath_hal_beacontimers(ah, &bs); 2587 sc->sc_imask |= HAL_INT_BMISS; 2588 ath_hal_intrset(ah, sc->sc_imask); 2589 } else { 2590 ath_hal_intrset(ah, 0); 2591 if (nexttbtt == intval) 2592 intval |= HAL_BEACON_RESET_TSF; 2593 if (ic->ic_opmode == IEEE80211_M_IBSS) { 2594 /* 2595 * In IBSS mode enable the beacon timers but only 2596 * enable SWBA interrupts if we need to manually 2597 * prepare beacon frames. Otherwise we use a 2598 * self-linked tx descriptor and let the hardware 2599 * deal with things. 2600 */ 2601 intval |= HAL_BEACON_ENA; 2602 if (!sc->sc_hasveol) 2603 sc->sc_imask |= HAL_INT_SWBA; 2604 if ((intval & HAL_BEACON_RESET_TSF) == 0) { 2605 /* 2606 * Pull nexttbtt forward to reflect 2607 * the current TSF. 2608 */ 2609 tsf = ath_hal_gettsf64(ah); 2610 tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE; 2611 do { 2612 nexttbtt += intval; 2613 } while (nexttbtt < tsftu); 2614 } 2615 ath_beaconq_config(sc); 2616 } else if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 2617 /* 2618 * In AP mode we enable the beacon timers and 2619 * SWBA interrupts to prepare beacon frames. 2620 */ 2621 intval |= HAL_BEACON_ENA; 2622 sc->sc_imask |= HAL_INT_SWBA; /* beacon prepare */ 2623 ath_beaconq_config(sc); 2624 } 2625 ath_hal_beaconinit(ah, nexttbtt, intval); 2626 sc->sc_bmisscount = 0; 2627 ath_hal_intrset(ah, sc->sc_imask); 2628 /* 2629 * When using a self-linked beacon descriptor in 2630 * ibss mode load it once here. 2631 */ 2632 if (ic->ic_opmode == IEEE80211_M_IBSS && sc->sc_hasveol) 2633 ath_beacon_proc(sc, 0); 2634 } 2635 sc->sc_syncbeacon = 0; 2636 #undef UNDEF 2637 #undef TSF_TO_TU 2638 } 2639 2640 static int 2641 ath_descdma_setup(struct ath_softc *sc, 2642 struct ath_descdma *dd, ath_bufhead *head, 2643 const char *name, int nbuf, int ndesc) 2644 { 2645 #define DS2PHYS(_dd, _ds) \ 2646 ((_dd)->dd_desc_paddr + ((char *)(_ds) - (char *)(_dd)->dd_desc)) 2647 struct ifnet *ifp = &sc->sc_if; 2648 struct ath_desc *ds; 2649 struct ath_buf *bf; 2650 int i, bsize, error; 2651 2652 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA: %u buffers %u desc/buf\n", 2653 __func__, name, nbuf, ndesc); 2654 2655 dd->dd_name = name; 2656 dd->dd_desc_len = sizeof(struct ath_desc) * nbuf * ndesc; 2657 2658 /* 2659 * Setup DMA descriptor area. 2660 */ 2661 dd->dd_dmat = sc->sc_dmat; 2662 2663 error = bus_dmamem_alloc(dd->dd_dmat, dd->dd_desc_len, PAGE_SIZE, 2664 0, &dd->dd_dseg, 1, &dd->dd_dnseg, 0); 2665 2666 if (error != 0) { 2667 if_printf(ifp, "unable to alloc memory for %u %s descriptors, " 2668 "error %u\n", nbuf * ndesc, dd->dd_name, error); 2669 goto fail0; 2670 } 2671 2672 error = bus_dmamem_map(dd->dd_dmat, &dd->dd_dseg, dd->dd_dnseg, 2673 dd->dd_desc_len, (void **)&dd->dd_desc, BUS_DMA_COHERENT); 2674 if (error != 0) { 2675 if_printf(ifp, "unable to map %u %s descriptors, error = %u\n", 2676 nbuf * ndesc, dd->dd_name, error); 2677 goto fail1; 2678 } 2679 2680 /* allocate descriptors */ 2681 error = bus_dmamap_create(dd->dd_dmat, dd->dd_desc_len, 1, 2682 dd->dd_desc_len, 0, BUS_DMA_NOWAIT, &dd->dd_dmamap); 2683 if (error != 0) { 2684 if_printf(ifp, "unable to create dmamap for %s descriptors, " 2685 "error %u\n", dd->dd_name, error); 2686 goto fail2; 2687 } 2688 2689 error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap, dd->dd_desc, 2690 dd->dd_desc_len, NULL, BUS_DMA_NOWAIT); 2691 if (error != 0) { 2692 if_printf(ifp, "unable to map %s descriptors, error %u\n", 2693 dd->dd_name, error); 2694 goto fail3; 2695 } 2696 2697 ds = dd->dd_desc; 2698 dd->dd_desc_paddr = dd->dd_dmamap->dm_segs[0].ds_addr; 2699 DPRINTF(sc, ATH_DEBUG_RESET, 2700 "%s: %s DMA map: %p (%lu) -> %" PRIx64 " (%lu)\n", 2701 __func__, dd->dd_name, ds, (u_long) dd->dd_desc_len, 2702 (uint64_t) dd->dd_desc_paddr, /*XXX*/ (u_long) dd->dd_desc_len); 2703 2704 /* allocate rx buffers */ 2705 bsize = sizeof(struct ath_buf) * nbuf; 2706 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO); 2707 if (bf == NULL) { 2708 if_printf(ifp, "malloc of %s buffers failed, size %u\n", 2709 dd->dd_name, bsize); 2710 goto fail4; 2711 } 2712 dd->dd_bufptr = bf; 2713 2714 STAILQ_INIT(head); 2715 for (i = 0; i < nbuf; i++, bf++, ds += ndesc) { 2716 bf->bf_desc = ds; 2717 bf->bf_daddr = DS2PHYS(dd, ds); 2718 error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, ndesc, 2719 MCLBYTES, 0, BUS_DMA_NOWAIT, &bf->bf_dmamap); 2720 if (error != 0) { 2721 if_printf(ifp, "unable to create dmamap for %s " 2722 "buffer %u, error %u\n", dd->dd_name, i, error); 2723 ath_descdma_cleanup(sc, dd, head); 2724 return error; 2725 } 2726 STAILQ_INSERT_TAIL(head, bf, bf_list); 2727 } 2728 return 0; 2729 fail4: 2730 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 2731 fail3: 2732 bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap); 2733 fail2: 2734 bus_dmamem_unmap(dd->dd_dmat, (void *)dd->dd_desc, dd->dd_desc_len); 2735 fail1: 2736 bus_dmamem_free(dd->dd_dmat, &dd->dd_dseg, dd->dd_dnseg); 2737 fail0: 2738 memset(dd, 0, sizeof(*dd)); 2739 return error; 2740 #undef DS2PHYS 2741 } 2742 2743 static void 2744 ath_descdma_cleanup(struct ath_softc *sc, 2745 struct ath_descdma *dd, ath_bufhead *head) 2746 { 2747 struct ath_buf *bf; 2748 struct ieee80211_node *ni; 2749 2750 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap); 2751 bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap); 2752 bus_dmamem_unmap(dd->dd_dmat, (void *)dd->dd_desc, dd->dd_desc_len); 2753 bus_dmamem_free(dd->dd_dmat, &dd->dd_dseg, dd->dd_dnseg); 2754 2755 STAILQ_FOREACH(bf, head, bf_list) { 2756 if (bf->bf_m) { 2757 m_freem(bf->bf_m); 2758 bf->bf_m = NULL; 2759 } 2760 if (bf->bf_dmamap != NULL) { 2761 bus_dmamap_destroy(sc->sc_dmat, bf->bf_dmamap); 2762 bf->bf_dmamap = NULL; 2763 } 2764 ni = bf->bf_node; 2765 bf->bf_node = NULL; 2766 if (ni != NULL) { 2767 /* 2768 * Reclaim node reference. 2769 */ 2770 ieee80211_free_node(ni); 2771 } 2772 } 2773 2774 STAILQ_INIT(head); 2775 free(dd->dd_bufptr, M_ATHDEV); 2776 memset(dd, 0, sizeof(*dd)); 2777 } 2778 2779 static int 2780 ath_desc_alloc(struct ath_softc *sc) 2781 { 2782 int error; 2783 2784 error = ath_descdma_setup(sc, &sc->sc_rxdma, &sc->sc_rxbuf, 2785 "rx", ath_rxbuf, 1); 2786 if (error != 0) 2787 return error; 2788 2789 error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf, 2790 "tx", ath_txbuf, ATH_TXDESC); 2791 if (error != 0) { 2792 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 2793 return error; 2794 } 2795 2796 error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf, 2797 "beacon", 1, 1); 2798 if (error != 0) { 2799 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 2800 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 2801 return error; 2802 } 2803 return 0; 2804 } 2805 2806 static void 2807 ath_desc_free(struct ath_softc *sc) 2808 { 2809 2810 if (sc->sc_bdma.dd_desc_len != 0) 2811 ath_descdma_cleanup(sc, &sc->sc_bdma, &sc->sc_bbuf); 2812 if (sc->sc_txdma.dd_desc_len != 0) 2813 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf); 2814 if (sc->sc_rxdma.dd_desc_len != 0) 2815 ath_descdma_cleanup(sc, &sc->sc_rxdma, &sc->sc_rxbuf); 2816 } 2817 2818 static struct ieee80211_node * 2819 ath_node_alloc(struct ieee80211_node_table *nt) 2820 { 2821 struct ieee80211com *ic = nt->nt_ic; 2822 struct ath_softc *sc = ic->ic_ifp->if_softc; 2823 const size_t space = sizeof(struct ath_node) + sc->sc_rc->arc_space; 2824 struct ath_node *an; 2825 2826 an = malloc(space, M_80211_NODE, M_NOWAIT | M_ZERO); 2827 if (an == NULL) { 2828 /* XXX stat+msg */ 2829 return NULL; 2830 } 2831 an->an_avgrssi = ATH_RSSI_DUMMY_MARKER; 2832 ath_rate_node_init(sc, an); 2833 2834 DPRINTF(sc, ATH_DEBUG_NODE, "%s: an %p\n", __func__, an); 2835 return &an->an_node; 2836 } 2837 2838 static void 2839 ath_node_free(struct ieee80211_node *ni) 2840 { 2841 struct ieee80211com *ic = ni->ni_ic; 2842 struct ath_softc *sc = ic->ic_ifp->if_softc; 2843 2844 DPRINTF(sc, ATH_DEBUG_NODE, "%s: ni %p\n", __func__, ni); 2845 2846 ath_rate_node_cleanup(sc, ATH_NODE(ni)); 2847 sc->sc_node_free(ni); 2848 } 2849 2850 static u_int8_t 2851 ath_node_getrssi(const struct ieee80211_node *ni) 2852 { 2853 #define HAL_EP_RND(x, mul) \ 2854 ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul)) 2855 u_int32_t avgrssi = ATH_NODE_CONST(ni)->an_avgrssi; 2856 int32_t rssi; 2857 2858 /* 2859 * When only one frame is received there will be no state in 2860 * avgrssi so fallback on the value recorded by the 802.11 layer. 2861 */ 2862 if (avgrssi != ATH_RSSI_DUMMY_MARKER) 2863 rssi = HAL_EP_RND(avgrssi, HAL_RSSI_EP_MULTIPLIER); 2864 else 2865 rssi = ni->ni_rssi; 2866 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 2867 #undef HAL_EP_RND 2868 } 2869 2870 static int 2871 ath_rxbuf_init(struct ath_softc *sc, struct ath_buf *bf) 2872 { 2873 struct ath_hal *ah = sc->sc_ah; 2874 int error; 2875 struct mbuf *m; 2876 struct ath_desc *ds; 2877 2878 m = bf->bf_m; 2879 if (m == NULL) { 2880 /* 2881 * NB: by assigning a page to the rx dma buffer we 2882 * implicitly satisfy the Atheros requirement that 2883 * this buffer be cache-line-aligned and sized to be 2884 * multiple of the cache line size. Not doing this 2885 * causes weird stuff to happen (for the 5210 at least). 2886 */ 2887 m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 2888 if (m == NULL) { 2889 DPRINTF(sc, ATH_DEBUG_ANY, 2890 "%s: no mbuf/cluster\n", __func__); 2891 sc->sc_stats.ast_rx_nombuf++; 2892 return ENOMEM; 2893 } 2894 bf->bf_m = m; 2895 m->m_pkthdr.len = m->m_len = m->m_ext.ext_size; 2896 2897 error = bus_dmamap_load_mbuf(sc->sc_dmat, 2898 bf->bf_dmamap, m, 2899 BUS_DMA_NOWAIT); 2900 if (error != 0) { 2901 DPRINTF(sc, ATH_DEBUG_ANY, 2902 "%s: bus_dmamap_load_mbuf failed; error %d\n", 2903 __func__, error); 2904 sc->sc_stats.ast_rx_busdma++; 2905 return error; 2906 } 2907 KASSERTMSG(bf->bf_nseg == 1, 2908 "multi-segment packet; nseg %u", bf->bf_nseg); 2909 } 2910 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 0, 2911 bf->bf_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 2912 2913 /* 2914 * Setup descriptors. For receive we always terminate 2915 * the descriptor list with a self-linked entry so we'll 2916 * not get overrun under high load (as can happen with a 2917 * 5212 when ANI processing enables PHY error frames). 2918 * 2919 * To insure the last descriptor is self-linked we create 2920 * each descriptor as self-linked and add it to the end. As 2921 * each additional descriptor is added the previous self-linked 2922 * entry is ``fixed'' naturally. This should be safe even 2923 * if DMA is happening. When processing RX interrupts we 2924 * never remove/process the last, self-linked, entry on the 2925 * descriptor list. This insures the hardware always has 2926 * someplace to write a new frame. 2927 */ 2928 ds = bf->bf_desc; 2929 ds->ds_link = HTOAH32(bf->bf_daddr); /* link to self */ 2930 ds->ds_data = bf->bf_segs[0].ds_addr; 2931 /* ds->ds_vdata = mtod(m, void *); for radar */ 2932 ath_hal_setuprxdesc(ah, ds 2933 , m->m_len /* buffer size */ 2934 , 0 2935 ); 2936 2937 if (sc->sc_rxlink != NULL) 2938 *sc->sc_rxlink = bf->bf_daddr; 2939 sc->sc_rxlink = &ds->ds_link; 2940 return 0; 2941 } 2942 2943 /* 2944 * Extend 15-bit time stamp from rx descriptor to 2945 * a full 64-bit TSF using the specified TSF. 2946 */ 2947 static inline u_int64_t 2948 ath_extend_tsf(u_int32_t rstamp, u_int64_t tsf) 2949 { 2950 if ((tsf & 0x7fff) < rstamp) 2951 tsf -= 0x8000; 2952 return ((tsf &~ 0x7fff) | rstamp); 2953 } 2954 2955 /* 2956 * Intercept management frames to collect beacon rssi data 2957 * and to do ibss merges. 2958 */ 2959 static void 2960 ath_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 2961 struct ieee80211_node *ni, 2962 int subtype, int rssi, u_int32_t rstamp) 2963 { 2964 struct ath_softc *sc = ic->ic_ifp->if_softc; 2965 2966 /* 2967 * Call up first so subsequent work can use information 2968 * potentially stored in the node (e.g. for ibss merge). 2969 */ 2970 sc->sc_recv_mgmt(ic, m, ni, subtype, rssi, rstamp); 2971 switch (subtype) { 2972 case IEEE80211_FC0_SUBTYPE_BEACON: 2973 /* update rssi statistics for use by the hal */ 2974 ATH_RSSI_LPF(sc->sc_halstats.ns_avgbrssi, rssi); 2975 if (sc->sc_syncbeacon && 2976 ni == ic->ic_bss && ic->ic_state == IEEE80211_S_RUN) { 2977 /* 2978 * Resync beacon timers using the tsf of the beacon 2979 * frame we just received. 2980 */ 2981 ath_beacon_config(sc); 2982 } 2983 /* fall thru... */ 2984 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 2985 if (ic->ic_opmode == IEEE80211_M_IBSS && 2986 ic->ic_state == IEEE80211_S_RUN) { 2987 u_int64_t tsf = ath_extend_tsf(rstamp, 2988 ath_hal_gettsf64(sc->sc_ah)); 2989 2990 /* 2991 * Handle ibss merge as needed; check the tsf on the 2992 * frame before attempting the merge. The 802.11 spec 2993 * says the station should change its bssid to match 2994 * the oldest station with the same ssid, where oldest 2995 * is determined by the tsf. Note that hardware 2996 * reconfiguration happens through callback to 2997 * ath_newstate as the state machine will go from 2998 * RUN -> RUN when this happens. 2999 */ 3000 if (le64toh(ni->ni_tstamp.tsf) >= tsf) { 3001 DPRINTF(sc, ATH_DEBUG_STATE, 3002 "ibss merge, rstamp %u tsf %ju " 3003 "tstamp %ju\n", rstamp, (uintmax_t)tsf, 3004 (uintmax_t)ni->ni_tstamp.tsf); 3005 (void) ieee80211_ibss_merge(ni); 3006 } 3007 } 3008 break; 3009 } 3010 } 3011 3012 /* 3013 * Set the default antenna. 3014 */ 3015 static void 3016 ath_setdefantenna(struct ath_softc *sc, u_int antenna) 3017 { 3018 struct ath_hal *ah = sc->sc_ah; 3019 3020 /* XXX block beacon interrupts */ 3021 ath_hal_setdefantenna(ah, antenna); 3022 if (sc->sc_defant != antenna) 3023 sc->sc_stats.ast_ant_defswitch++; 3024 sc->sc_defant = antenna; 3025 sc->sc_rxotherant = 0; 3026 } 3027 3028 static void 3029 ath_handle_micerror(struct ieee80211com *ic, 3030 struct ieee80211_frame *wh, int keyix) 3031 { 3032 struct ieee80211_node *ni; 3033 3034 /* XXX recheck MIC to deal w/ chips that lie */ 3035 /* XXX discard MIC errors on !data frames */ 3036 ni = ieee80211_find_rxnode_withkey(ic, (const struct ieee80211_frame_min *) wh, keyix); 3037 if (ni != NULL) { 3038 ieee80211_notify_michael_failure(ic, wh, keyix); 3039 ieee80211_free_node(ni); 3040 } 3041 } 3042 3043 static void 3044 ath_rx_proc(void *arg, int npending) 3045 { 3046 #define PA2DESC(_sc, _pa) \ 3047 ((struct ath_desc *)((char *)(_sc)->sc_rxdma.dd_desc + \ 3048 ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr))) 3049 struct ath_softc *sc = arg; 3050 struct ath_buf *bf; 3051 struct ieee80211com *ic = &sc->sc_ic; 3052 struct ifnet *ifp = &sc->sc_if; 3053 struct ath_hal *ah = sc->sc_ah; 3054 struct ath_desc *ds; 3055 struct mbuf *m; 3056 struct ieee80211_node *ni; 3057 struct ath_node *an; 3058 int len, ngood, type; 3059 u_int phyerr; 3060 HAL_STATUS status; 3061 int16_t nf; 3062 u_int64_t tsf; 3063 uint8_t rxerr_tap, rxerr_mon; 3064 NET_LOCK_GIANT_FUNC_INIT(); 3065 3066 NET_LOCK_GIANT(); /* XXX */ 3067 3068 rxerr_tap = 3069 (ifp->if_flags & IFF_PROMISC) ? HAL_RXERR_CRC|HAL_RXERR_PHY : 0; 3070 3071 if (sc->sc_ic.ic_opmode == IEEE80211_M_MONITOR) 3072 rxerr_mon = HAL_RXERR_DECRYPT|HAL_RXERR_MIC; 3073 else if (ifp->if_flags & IFF_PROMISC) 3074 rxerr_tap |= HAL_RXERR_DECRYPT|HAL_RXERR_MIC; 3075 3076 DPRINTF(sc, ATH_DEBUG_RX_PROC, "%s: pending %u\n", __func__, npending); 3077 ngood = 0; 3078 nf = ath_hal_getchannoise(ah, &sc->sc_curchan); 3079 tsf = ath_hal_gettsf64(ah); 3080 do { 3081 bf = STAILQ_FIRST(&sc->sc_rxbuf); 3082 if (bf == NULL) { /* NB: shouldn't happen */ 3083 if_printf(ifp, "%s: no buffer!\n", __func__); 3084 break; 3085 } 3086 ds = bf->bf_desc; 3087 if (ds->ds_link == bf->bf_daddr) { 3088 /* NB: never process the self-linked entry at the end */ 3089 break; 3090 } 3091 m = bf->bf_m; 3092 if (m == NULL) { /* NB: shouldn't happen */ 3093 if_printf(ifp, "%s: no mbuf!\n", __func__); 3094 break; 3095 } 3096 /* XXX sync descriptor memory */ 3097 /* 3098 * Must provide the virtual address of the current 3099 * descriptor, the physical address, and the virtual 3100 * address of the next descriptor in the h/w chain. 3101 * This allows the HAL to look ahead to see if the 3102 * hardware is done with a descriptor by checking the 3103 * done bit in the following descriptor and the address 3104 * of the current descriptor the DMA engine is working 3105 * on. All this is necessary because of our use of 3106 * a self-linked list to avoid rx overruns. 3107 */ 3108 status = ath_hal_rxprocdesc(ah, ds, 3109 bf->bf_daddr, PA2DESC(sc, ds->ds_link), 3110 &ds->ds_rxstat); 3111 #ifdef AR_DEBUG 3112 if (sc->sc_debug & ATH_DEBUG_RECV_DESC) 3113 ath_printrxbuf(bf, status == HAL_OK); 3114 #endif 3115 if (status == HAL_EINPROGRESS) 3116 break; 3117 STAILQ_REMOVE_HEAD(&sc->sc_rxbuf, bf_list); 3118 if (ds->ds_rxstat.rs_more) { 3119 /* 3120 * Frame spans multiple descriptors; this 3121 * cannot happen yet as we don't support 3122 * jumbograms. If not in monitor mode, 3123 * discard the frame. 3124 */ 3125 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 3126 sc->sc_stats.ast_rx_toobig++; 3127 goto rx_next; 3128 } 3129 /* fall thru for monitor mode handling... */ 3130 } else if (ds->ds_rxstat.rs_status != 0) { 3131 if (ds->ds_rxstat.rs_status & HAL_RXERR_CRC) 3132 sc->sc_stats.ast_rx_crcerr++; 3133 if (ds->ds_rxstat.rs_status & HAL_RXERR_FIFO) 3134 sc->sc_stats.ast_rx_fifoerr++; 3135 if (ds->ds_rxstat.rs_status & HAL_RXERR_PHY) { 3136 sc->sc_stats.ast_rx_phyerr++; 3137 phyerr = ds->ds_rxstat.rs_phyerr & 0x1f; 3138 sc->sc_stats.ast_rx_phy[phyerr]++; 3139 goto rx_next; 3140 } 3141 if (ds->ds_rxstat.rs_status & HAL_RXERR_DECRYPT) { 3142 /* 3143 * Decrypt error. If the error occurred 3144 * because there was no hardware key, then 3145 * let the frame through so the upper layers 3146 * can process it. This is necessary for 5210 3147 * parts which have no way to setup a ``clear'' 3148 * key cache entry. 3149 * 3150 * XXX do key cache faulting 3151 */ 3152 if (ds->ds_rxstat.rs_keyix == HAL_RXKEYIX_INVALID) 3153 goto rx_accept; 3154 sc->sc_stats.ast_rx_badcrypt++; 3155 } 3156 if (ds->ds_rxstat.rs_status & HAL_RXERR_MIC) { 3157 sc->sc_stats.ast_rx_badmic++; 3158 /* 3159 * Do minimal work required to hand off 3160 * the 802.11 header for notifcation. 3161 */ 3162 /* XXX frag's and qos frames */ 3163 len = ds->ds_rxstat.rs_datalen; 3164 if (len >= sizeof (struct ieee80211_frame)) { 3165 bus_dmamap_sync(sc->sc_dmat, 3166 bf->bf_dmamap, 3167 0, bf->bf_dmamap->dm_mapsize, 3168 BUS_DMASYNC_POSTREAD); 3169 ath_handle_micerror(ic, 3170 mtod(m, struct ieee80211_frame *), 3171 sc->sc_splitmic ? 3172 ds->ds_rxstat.rs_keyix-32 : ds->ds_rxstat.rs_keyix); 3173 } 3174 } 3175 ifp->if_ierrors++; 3176 /* 3177 * Reject error frames, we normally don't want 3178 * to see them in monitor mode (in monitor mode 3179 * allow through packets that have crypto problems). 3180 */ 3181 3182 if (ds->ds_rxstat.rs_status &~ (rxerr_tap|rxerr_mon)) 3183 goto rx_next; 3184 } 3185 rx_accept: 3186 /* 3187 * Sync and unmap the frame. At this point we're 3188 * committed to passing the mbuf somewhere so clear 3189 * bf_m; this means a new sk_buff must be allocated 3190 * when the rx descriptor is setup again to receive 3191 * another frame. 3192 */ 3193 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3194 0, bf->bf_dmamap->dm_mapsize, 3195 BUS_DMASYNC_POSTREAD); 3196 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 3197 bf->bf_m = NULL; 3198 3199 m_set_rcvif(m, ifp); 3200 len = ds->ds_rxstat.rs_datalen; 3201 m->m_pkthdr.len = m->m_len = len; 3202 3203 sc->sc_stats.ast_ant_rx[ds->ds_rxstat.rs_antenna]++; 3204 3205 if (sc->sc_drvbpf) { 3206 u_int8_t rix; 3207 3208 /* 3209 * Discard anything shorter than an ack or cts. 3210 */ 3211 if (len < IEEE80211_ACK_LEN) { 3212 DPRINTF(sc, ATH_DEBUG_RECV, 3213 "%s: runt packet %d\n", 3214 __func__, len); 3215 sc->sc_stats.ast_rx_tooshort++; 3216 m_freem(m); 3217 goto rx_next; 3218 } 3219 rix = ds->ds_rxstat.rs_rate; 3220 sc->sc_rx_th.wr_tsf = htole64( 3221 ath_extend_tsf(ds->ds_rxstat.rs_tstamp, tsf)); 3222 sc->sc_rx_th.wr_flags = sc->sc_hwmap[rix].rxflags; 3223 if (ds->ds_rxstat.rs_status & 3224 (HAL_RXERR_CRC|HAL_RXERR_PHY)) { 3225 sc->sc_rx_th.wr_flags |= 3226 IEEE80211_RADIOTAP_F_BADFCS; 3227 } 3228 sc->sc_rx_th.wr_rate = sc->sc_hwmap[rix].ieeerate; 3229 sc->sc_rx_th.wr_antsignal = ds->ds_rxstat.rs_rssi + nf; 3230 sc->sc_rx_th.wr_antnoise = nf; 3231 sc->sc_rx_th.wr_antenna = ds->ds_rxstat.rs_antenna; 3232 3233 bpf_mtap2(sc->sc_drvbpf, &sc->sc_rx_th, 3234 sc->sc_rx_th_len, m, BPF_D_IN); 3235 } 3236 3237 if (ds->ds_rxstat.rs_status & rxerr_tap) { 3238 m_freem(m); 3239 goto rx_next; 3240 } 3241 /* 3242 * From this point on we assume the frame is at least 3243 * as large as ieee80211_frame_min; verify that. 3244 */ 3245 if (len < IEEE80211_MIN_LEN) { 3246 DPRINTF(sc, ATH_DEBUG_RECV, "%s: short packet %d\n", 3247 __func__, len); 3248 sc->sc_stats.ast_rx_tooshort++; 3249 m_freem(m); 3250 goto rx_next; 3251 } 3252 3253 if (IFF_DUMPPKTS(sc, ATH_DEBUG_RECV)) { 3254 ieee80211_dump_pkt(mtod(m, void *), len, 3255 sc->sc_hwmap[ds->ds_rxstat.rs_rate].ieeerate, 3256 ds->ds_rxstat.rs_rssi); 3257 } 3258 3259 m_adj(m, -IEEE80211_CRC_LEN); 3260 3261 /* 3262 * Locate the node for sender, track state, and then 3263 * pass the (referenced) node up to the 802.11 layer 3264 * for its use. 3265 */ 3266 ni = ieee80211_find_rxnode_withkey(ic, 3267 mtod(m, const struct ieee80211_frame_min *), 3268 ds->ds_rxstat.rs_keyix == HAL_RXKEYIX_INVALID ? 3269 IEEE80211_KEYIX_NONE : ds->ds_rxstat.rs_keyix); 3270 /* 3271 * Track rx rssi and do any rx antenna management. 3272 */ 3273 an = ATH_NODE(ni); 3274 ATH_RSSI_LPF(an->an_avgrssi, ds->ds_rxstat.rs_rssi); 3275 ATH_RSSI_LPF(sc->sc_halstats.ns_avgrssi, ds->ds_rxstat.rs_rssi); 3276 /* 3277 * Send frame up for processing. 3278 */ 3279 type = ieee80211_input(ic, m, ni, 3280 ds->ds_rxstat.rs_rssi, ds->ds_rxstat.rs_tstamp); 3281 ieee80211_free_node(ni); 3282 if (sc->sc_diversity) { 3283 /* 3284 * When using fast diversity, change the default rx 3285 * antenna if diversity chooses the other antenna 3 3286 * times in a row. 3287 */ 3288 if (sc->sc_defant != ds->ds_rxstat.rs_antenna) { 3289 if (++sc->sc_rxotherant >= 3) 3290 ath_setdefantenna(sc, 3291 ds->ds_rxstat.rs_antenna); 3292 } else 3293 sc->sc_rxotherant = 0; 3294 } 3295 if (sc->sc_softled) { 3296 /* 3297 * Blink for any data frame. Otherwise do a 3298 * heartbeat-style blink when idle. The latter 3299 * is mainly for station mode where we depend on 3300 * periodic beacon frames to trigger the poll event. 3301 */ 3302 if (type == IEEE80211_FC0_TYPE_DATA) { 3303 sc->sc_rxrate = ds->ds_rxstat.rs_rate; 3304 ath_led_event(sc, ATH_LED_RX); 3305 } else if (ticks - sc->sc_ledevent >= sc->sc_ledidle) 3306 ath_led_event(sc, ATH_LED_POLL); 3307 } 3308 /* 3309 * Arrange to update the last rx timestamp only for 3310 * frames from our ap when operating in station mode. 3311 * This assumes the rx key is always setup when associated. 3312 */ 3313 if (ic->ic_opmode == IEEE80211_M_STA && 3314 ds->ds_rxstat.rs_keyix != HAL_RXKEYIX_INVALID) 3315 ngood++; 3316 rx_next: 3317 STAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list); 3318 } while (ath_rxbuf_init(sc, bf) == 0); 3319 3320 /* rx signal state monitoring */ 3321 ath_hal_rxmonitor(ah, &sc->sc_halstats, &sc->sc_curchan); 3322 #if 0 3323 if (ath_hal_radar_event(ah)) 3324 TASK_RUN_OR_ENQUEUE(&sc->sc_radartask); 3325 #endif 3326 if (ngood) 3327 sc->sc_lastrx = tsf; 3328 3329 #ifdef __NetBSD__ 3330 /* XXX Why isn't this necessary in FreeBSD? */ 3331 if ((ifp->if_flags & IFF_OACTIVE) == 0 && !IFQ_IS_EMPTY(&ifp->if_snd)) 3332 ath_start(ifp); 3333 #endif /* __NetBSD__ */ 3334 3335 NET_UNLOCK_GIANT(); /* XXX */ 3336 #undef PA2DESC 3337 } 3338 3339 /* 3340 * Setup a h/w transmit queue. 3341 */ 3342 static struct ath_txq * 3343 ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) 3344 { 3345 #define N(a) (sizeof(a)/sizeof(a[0])) 3346 struct ath_hal *ah = sc->sc_ah; 3347 HAL_TXQ_INFO qi; 3348 int qnum; 3349 3350 memset(&qi, 0, sizeof(qi)); 3351 qi.tqi_subtype = subtype; 3352 qi.tqi_aifs = HAL_TXQ_USEDEFAULT; 3353 qi.tqi_cwmin = HAL_TXQ_USEDEFAULT; 3354 qi.tqi_cwmax = HAL_TXQ_USEDEFAULT; 3355 /* 3356 * Enable interrupts only for EOL and DESC conditions. 3357 * We mark tx descriptors to receive a DESC interrupt 3358 * when a tx queue gets deep; otherwise waiting for the 3359 * EOL to reap descriptors. Note that this is done to 3360 * reduce interrupt load and this only defers reaping 3361 * descriptors, never transmitting frames. Aside from 3362 * reducing interrupts this also permits more concurrency. 3363 * The only potential downside is if the tx queue backs 3364 * up in which case the top half of the kernel may backup 3365 * due to a lack of tx descriptors. 3366 */ 3367 qi.tqi_qflags = HAL_TXQ_TXEOLINT_ENABLE | HAL_TXQ_TXDESCINT_ENABLE; 3368 qnum = ath_hal_setuptxqueue(ah, qtype, &qi); 3369 if (qnum == -1) { 3370 /* 3371 * NB: don't print a message, this happens 3372 * normally on parts with too few tx queues 3373 */ 3374 return NULL; 3375 } 3376 if (qnum >= N(sc->sc_txq)) { 3377 device_printf(sc->sc_dev, 3378 "hal qnum %u out of range, max %zu!\n", 3379 qnum, N(sc->sc_txq)); 3380 ath_hal_releasetxqueue(ah, qnum); 3381 return NULL; 3382 } 3383 if (!ATH_TXQ_SETUP(sc, qnum)) { 3384 struct ath_txq *txq = &sc->sc_txq[qnum]; 3385 3386 txq->axq_qnum = qnum; 3387 txq->axq_depth = 0; 3388 txq->axq_intrcnt = 0; 3389 txq->axq_link = NULL; 3390 STAILQ_INIT(&txq->axq_q); 3391 ATH_TXQ_LOCK_INIT(sc, txq); 3392 sc->sc_txqsetup |= 1<<qnum; 3393 } 3394 return &sc->sc_txq[qnum]; 3395 #undef N 3396 } 3397 3398 /* 3399 * Setup a hardware data transmit queue for the specified 3400 * access control. The hal may not support all requested 3401 * queues in which case it will return a reference to a 3402 * previously setup queue. We record the mapping from ac's 3403 * to h/w queues for use by ath_tx_start and also track 3404 * the set of h/w queues being used to optimize work in the 3405 * transmit interrupt handler and related routines. 3406 */ 3407 static int 3408 ath_tx_setup(struct ath_softc *sc, int ac, int haltype) 3409 { 3410 #define N(a) (sizeof(a)/sizeof(a[0])) 3411 struct ath_txq *txq; 3412 3413 if (ac >= N(sc->sc_ac2q)) { 3414 device_printf(sc->sc_dev, "AC %u out of range, max %zu!\n", 3415 ac, N(sc->sc_ac2q)); 3416 return 0; 3417 } 3418 txq = ath_txq_setup(sc, HAL_TX_QUEUE_DATA, haltype); 3419 if (txq != NULL) { 3420 sc->sc_ac2q[ac] = txq; 3421 return 1; 3422 } else 3423 return 0; 3424 #undef N 3425 } 3426 3427 /* 3428 * Update WME parameters for a transmit queue. 3429 */ 3430 static int 3431 ath_txq_update(struct ath_softc *sc, int ac) 3432 { 3433 #define ATH_EXPONENT_TO_VALUE(v) ((1<<v)-1) 3434 #define ATH_TXOP_TO_US(v) (v<<5) 3435 struct ieee80211com *ic = &sc->sc_ic; 3436 struct ath_txq *txq = sc->sc_ac2q[ac]; 3437 struct wmeParams *wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 3438 struct ath_hal *ah = sc->sc_ah; 3439 HAL_TXQ_INFO qi; 3440 3441 ath_hal_gettxqueueprops(ah, txq->axq_qnum, &qi); 3442 qi.tqi_aifs = wmep->wmep_aifsn; 3443 qi.tqi_cwmin = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmin); 3444 qi.tqi_cwmax = ATH_EXPONENT_TO_VALUE(wmep->wmep_logcwmax); 3445 qi.tqi_burstTime = ATH_TXOP_TO_US(wmep->wmep_txopLimit); 3446 3447 if (!ath_hal_settxqueueprops(ah, txq->axq_qnum, &qi)) { 3448 device_printf(sc->sc_dev, "unable to update hardware queue " 3449 "parameters for %s traffic!\n", 3450 ieee80211_wme_acnames[ac]); 3451 return 0; 3452 } else { 3453 ath_hal_resettxqueue(ah, txq->axq_qnum); /* push to h/w */ 3454 return 1; 3455 } 3456 #undef ATH_TXOP_TO_US 3457 #undef ATH_EXPONENT_TO_VALUE 3458 } 3459 3460 /* 3461 * Callback from the 802.11 layer to update WME parameters. 3462 */ 3463 static int 3464 ath_wme_update(struct ieee80211com *ic) 3465 { 3466 struct ath_softc *sc = ic->ic_ifp->if_softc; 3467 3468 return !ath_txq_update(sc, WME_AC_BE) || 3469 !ath_txq_update(sc, WME_AC_BK) || 3470 !ath_txq_update(sc, WME_AC_VI) || 3471 !ath_txq_update(sc, WME_AC_VO) ? EIO : 0; 3472 } 3473 3474 /* 3475 * Reclaim resources for a setup queue. 3476 */ 3477 static void 3478 ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) 3479 { 3480 3481 ath_hal_releasetxqueue(sc->sc_ah, txq->axq_qnum); 3482 ATH_TXQ_LOCK_DESTROY(txq); 3483 sc->sc_txqsetup &= ~(1<<txq->axq_qnum); 3484 } 3485 3486 /* 3487 * Reclaim all tx queue resources. 3488 */ 3489 static void 3490 ath_tx_cleanup(struct ath_softc *sc) 3491 { 3492 int i; 3493 3494 ATH_TXBUF_LOCK_DESTROY(sc); 3495 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 3496 if (ATH_TXQ_SETUP(sc, i)) 3497 ath_tx_cleanupq(sc, &sc->sc_txq[i]); 3498 } 3499 3500 /* 3501 * Defragment an mbuf chain, returning at most maxfrags separate 3502 * mbufs+clusters. If this is not possible NULL is returned and 3503 * the original mbuf chain is left in its present (potentially 3504 * modified) state. We use two techniques: collapsing consecutive 3505 * mbufs and replacing consecutive mbufs by a cluster. 3506 */ 3507 static struct mbuf * 3508 ath_defrag(struct mbuf *m0, int how, int maxfrags) 3509 { 3510 struct mbuf *m, *n, *n2, **prev; 3511 u_int curfrags; 3512 3513 /* 3514 * Calculate the current number of frags. 3515 */ 3516 curfrags = 0; 3517 for (m = m0; m != NULL; m = m->m_next) 3518 curfrags++; 3519 /* 3520 * First, try to collapse mbufs. Note that we always collapse 3521 * towards the front so we don't need to deal with moving the 3522 * pkthdr. This may be suboptimal if the first mbuf has much 3523 * less data than the following. 3524 */ 3525 m = m0; 3526 again: 3527 for (;;) { 3528 n = m->m_next; 3529 if (n == NULL) 3530 break; 3531 if (n->m_len < M_TRAILINGSPACE(m)) { 3532 memcpy(mtod(m, char *) + m->m_len, mtod(n, void *), 3533 n->m_len); 3534 m->m_len += n->m_len; 3535 m->m_next = n->m_next; 3536 m_free(n); 3537 if (--curfrags <= maxfrags) 3538 return m0; 3539 } else 3540 m = n; 3541 } 3542 KASSERTMSG(maxfrags > 1, 3543 "maxfrags %u, but normal collapse failed", maxfrags); 3544 /* 3545 * Collapse consecutive mbufs to a cluster. 3546 */ 3547 prev = &m0->m_next; /* NB: not the first mbuf */ 3548 while ((n = *prev) != NULL) { 3549 if ((n2 = n->m_next) != NULL && 3550 n->m_len + n2->m_len < MCLBYTES) { 3551 m = m_getcl(how, MT_DATA, 0); 3552 if (m == NULL) 3553 goto bad; 3554 bcopy(mtod(n, void *), mtod(m, void *), n->m_len); 3555 bcopy(mtod(n2, void *), mtod(m, char *) + n->m_len, 3556 n2->m_len); 3557 m->m_len = n->m_len + n2->m_len; 3558 m->m_next = n2->m_next; 3559 *prev = m; 3560 m_free(n); 3561 m_free(n2); 3562 if (--curfrags <= maxfrags) /* +1 cl -2 mbufs */ 3563 return m0; 3564 /* 3565 * Still not there, try the normal collapse 3566 * again before we allocate another cluster. 3567 */ 3568 goto again; 3569 } 3570 prev = &n->m_next; 3571 } 3572 /* 3573 * No place where we can collapse to a cluster; punt. 3574 * This can occur if, for example, you request 2 frags 3575 * but the packet requires that both be clusters (we 3576 * never reallocate the first mbuf to avoid moving the 3577 * packet header). 3578 */ 3579 bad: 3580 return NULL; 3581 } 3582 3583 /* 3584 * Return h/w rate index for an IEEE rate (w/o basic rate bit). 3585 */ 3586 static int 3587 ath_tx_findrix(const HAL_RATE_TABLE *rt, int rate) 3588 { 3589 int i; 3590 3591 for (i = 0; i < rt->rateCount; i++) 3592 if ((rt->info[i].dot11Rate & IEEE80211_RATE_VAL) == rate) 3593 return i; 3594 return 0; /* NB: lowest rate */ 3595 } 3596 3597 static void 3598 ath_freetx(struct mbuf *m) 3599 { 3600 struct mbuf *next; 3601 3602 do { 3603 next = m->m_nextpkt; 3604 m->m_nextpkt = NULL; 3605 m_freem(m); 3606 } while ((m = next) != NULL); 3607 } 3608 3609 static int 3610 deduct_pad_bytes(int len, int hdrlen) 3611 { 3612 /* XXX I am suspicious that this code, which I extracted 3613 * XXX from ath_tx_start() for reuse, does the right thing. 3614 */ 3615 return len - (hdrlen & 3); 3616 } 3617 3618 static int 3619 ath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_buf *bf, 3620 struct mbuf *m0) 3621 { 3622 struct ieee80211com *ic = &sc->sc_ic; 3623 struct ath_hal *ah = sc->sc_ah; 3624 struct ifnet *ifp = &sc->sc_if; 3625 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 3626 int i, error, iswep, ismcast, isfrag, ismrr; 3627 int keyix, hdrlen, pktlen, try0; 3628 u_int8_t rix, txrate, ctsrate; 3629 u_int8_t cix = 0xff; /* NB: silence compiler */ 3630 struct ath_desc *ds, *ds0; 3631 struct ath_txq *txq; 3632 struct ieee80211_frame *wh; 3633 u_int subtype, flags, ctsduration; 3634 HAL_PKT_TYPE atype; 3635 const HAL_RATE_TABLE *rt; 3636 HAL_BOOL shortPreamble; 3637 struct ath_node *an; 3638 struct mbuf *m; 3639 u_int pri; 3640 3641 wh = mtod(m0, struct ieee80211_frame *); 3642 iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 3643 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 3644 isfrag = m0->m_flags & M_FRAG; 3645 hdrlen = ieee80211_anyhdrsize(wh); 3646 /* 3647 * Packet length must not include any 3648 * pad bytes; deduct them here. 3649 */ 3650 pktlen = deduct_pad_bytes(m0->m_pkthdr.len, hdrlen); 3651 3652 if (iswep) { 3653 const struct ieee80211_cipher *cip; 3654 struct ieee80211_key *k; 3655 3656 /* 3657 * Construct the 802.11 header+trailer for an encrypted 3658 * frame. The only reason this can fail is because of an 3659 * unknown or unsupported cipher/key type. 3660 */ 3661 k = ieee80211_crypto_encap(ic, ni, m0); 3662 if (k == NULL) { 3663 /* 3664 * This can happen when the key is yanked after the 3665 * frame was queued. Just discard the frame; the 3666 * 802.11 layer counts failures and provides 3667 * debugging/diagnostics. 3668 */ 3669 ath_freetx(m0); 3670 return EIO; 3671 } 3672 /* 3673 * Adjust the packet + header lengths for the crypto 3674 * additions and calculate the h/w key index. When 3675 * a s/w mic is done the frame will have had any mic 3676 * added to it prior to entry so m0->m_pkthdr.len above will 3677 * account for it. Otherwise we need to add it to the 3678 * packet length. 3679 */ 3680 cip = k->wk_cipher; 3681 hdrlen += cip->ic_header; 3682 pktlen += cip->ic_header + cip->ic_trailer; 3683 /* NB: frags always have any TKIP MIC done in s/w */ 3684 if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 3685 pktlen += cip->ic_miclen; 3686 keyix = k->wk_keyix; 3687 3688 /* packet header may have moved, reset our local pointer */ 3689 wh = mtod(m0, struct ieee80211_frame *); 3690 } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 3691 /* 3692 * Use station key cache slot, if assigned. 3693 */ 3694 keyix = ni->ni_ucastkey.wk_keyix; 3695 if (keyix == IEEE80211_KEYIX_NONE) 3696 keyix = HAL_TXKEYIX_INVALID; 3697 } else 3698 keyix = HAL_TXKEYIX_INVALID; 3699 3700 pktlen += IEEE80211_CRC_LEN; 3701 3702 /* 3703 * Load the DMA map so any coalescing is done. This 3704 * also calculates the number of descriptors we need. 3705 */ 3706 error = bus_dmamap_load_mbuf(sc->sc_dmat, bf->bf_dmamap, m0, 3707 BUS_DMA_NOWAIT); 3708 if (error == EFBIG) { 3709 /* XXX packet requires too many descriptors */ 3710 bf->bf_nseg = ATH_TXDESC+1; 3711 } else if (error != 0) { 3712 sc->sc_stats.ast_tx_busdma++; 3713 ath_freetx(m0); 3714 return error; 3715 } 3716 /* 3717 * Discard null packets and check for packets that 3718 * require too many TX descriptors. We try to convert 3719 * the latter to a cluster. 3720 */ 3721 if (error == EFBIG) { /* too many desc's, linearize */ 3722 sc->sc_stats.ast_tx_linear++; 3723 m = ath_defrag(m0, M_DONTWAIT, ATH_TXDESC); 3724 if (m == NULL) { 3725 ath_freetx(m0); 3726 sc->sc_stats.ast_tx_nombuf++; 3727 return ENOMEM; 3728 } 3729 m0 = m; 3730 error = bus_dmamap_load_mbuf(sc->sc_dmat, bf->bf_dmamap, m0, 3731 BUS_DMA_NOWAIT); 3732 if (error != 0) { 3733 sc->sc_stats.ast_tx_busdma++; 3734 ath_freetx(m0); 3735 return error; 3736 } 3737 KASSERTMSG(bf->bf_nseg <= ATH_TXDESC, 3738 "too many segments after defrag; nseg %u", bf->bf_nseg); 3739 } else if (bf->bf_nseg == 0) { /* null packet, discard */ 3740 sc->sc_stats.ast_tx_nodata++; 3741 ath_freetx(m0); 3742 return EIO; 3743 } 3744 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", __func__, m0, pktlen); 3745 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 0, 3746 bf->bf_dmamap->dm_mapsize, BUS_DMASYNC_PREWRITE); 3747 bf->bf_m = m0; 3748 bf->bf_node = ni; /* NB: held reference */ 3749 3750 /* setup descriptors */ 3751 ds = bf->bf_desc; 3752 rt = sc->sc_currates; 3753 KASSERTMSG(rt != NULL, "no rate table, mode %u", sc->sc_curmode); 3754 3755 /* 3756 * NB: the 802.11 layer marks whether or not we should 3757 * use short preamble based on the current mode and 3758 * negotiated parameters. 3759 */ 3760 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 3761 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) && !ismcast) { 3762 shortPreamble = AH_TRUE; 3763 sc->sc_stats.ast_tx_shortpre++; 3764 } else { 3765 shortPreamble = AH_FALSE; 3766 } 3767 3768 an = ATH_NODE(ni); 3769 flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 3770 ismrr = 0; /* default no multi-rate retry*/ 3771 /* 3772 * Calculate Atheros packet type from IEEE80211 packet header, 3773 * setup for rate calculations, and select h/w transmit queue. 3774 */ 3775 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 3776 case IEEE80211_FC0_TYPE_MGT: 3777 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 3778 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 3779 atype = HAL_PKT_TYPE_BEACON; 3780 else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 3781 atype = HAL_PKT_TYPE_PROBE_RESP; 3782 else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 3783 atype = HAL_PKT_TYPE_ATIM; 3784 else 3785 atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 3786 rix = sc->sc_minrateix; 3787 txrate = rt->info[rix].rateCode; 3788 if (shortPreamble) 3789 txrate |= rt->info[rix].shortPreamble; 3790 try0 = ATH_TXMGTTRY; 3791 /* NB: force all management frames to highest queue */ 3792 if (ni->ni_flags & IEEE80211_NODE_QOS) { 3793 /* NB: force all management frames to highest queue */ 3794 pri = WME_AC_VO; 3795 } else 3796 pri = WME_AC_BE; 3797 flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 3798 break; 3799 case IEEE80211_FC0_TYPE_CTL: 3800 atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 3801 rix = sc->sc_minrateix; 3802 txrate = rt->info[rix].rateCode; 3803 if (shortPreamble) 3804 txrate |= rt->info[rix].shortPreamble; 3805 try0 = ATH_TXMGTTRY; 3806 /* NB: force all ctl frames to highest queue */ 3807 if (ni->ni_flags & IEEE80211_NODE_QOS) { 3808 /* NB: force all ctl frames to highest queue */ 3809 pri = WME_AC_VO; 3810 } else 3811 pri = WME_AC_BE; 3812 flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 3813 break; 3814 case IEEE80211_FC0_TYPE_DATA: 3815 atype = HAL_PKT_TYPE_NORMAL; /* default */ 3816 /* 3817 * Data frames: multicast frames go out at a fixed rate, 3818 * otherwise consult the rate control module for the 3819 * rate to use. 3820 */ 3821 if (ismcast) { 3822 /* 3823 * Check mcast rate setting in case it's changed. 3824 * XXX move out of fastpath 3825 */ 3826 if (ic->ic_mcast_rate != sc->sc_mcastrate) { 3827 sc->sc_mcastrix = 3828 ath_tx_findrix(rt, ic->ic_mcast_rate); 3829 sc->sc_mcastrate = ic->ic_mcast_rate; 3830 } 3831 rix = sc->sc_mcastrix; 3832 txrate = rt->info[rix].rateCode; 3833 try0 = 1; 3834 } else { 3835 ath_rate_findrate(sc, an, shortPreamble, pktlen, 3836 &rix, &try0, &txrate); 3837 sc->sc_txrate = txrate; /* for LED blinking */ 3838 if (try0 != ATH_TXMAXTRY) 3839 ismrr = 1; 3840 } 3841 pri = M_WME_GETAC(m0); 3842 if (cap->cap_wmeParams[pri].wmep_noackPolicy) 3843 flags |= HAL_TXDESC_NOACK; 3844 break; 3845 default: 3846 if_printf(ifp, "bogus frame type 0x%x (%s)\n", 3847 wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 3848 /* XXX statistic */ 3849 ath_freetx(m0); 3850 return EIO; 3851 } 3852 txq = sc->sc_ac2q[pri]; 3853 3854 /* 3855 * When servicing one or more stations in power-save mode 3856 * multicast frames must be buffered until after the beacon. 3857 * We use the CAB queue for that. 3858 */ 3859 if (ismcast && ic->ic_ps_sta) { 3860 txq = sc->sc_cabq; 3861 /* XXX? more bit in 802.11 frame header */ 3862 } 3863 3864 /* 3865 * Calculate miscellaneous flags. 3866 */ 3867 if (ismcast) { 3868 flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 3869 } else if (pktlen > ic->ic_rtsthreshold) { 3870 flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 3871 cix = rt->info[rix].controlRate; 3872 sc->sc_stats.ast_tx_rts++; 3873 } 3874 if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 3875 sc->sc_stats.ast_tx_noack++; 3876 3877 /* 3878 * If 802.11g protection is enabled, determine whether 3879 * to use RTS/CTS or just CTS. Note that this is only 3880 * done for OFDM unicast frames. 3881 */ 3882 if ((ic->ic_flags & IEEE80211_F_USEPROT) && 3883 rt->info[rix].phy == IEEE80211_T_OFDM && 3884 (flags & HAL_TXDESC_NOACK) == 0) { 3885 /* XXX fragments must use CCK rates w/ protection */ 3886 if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) 3887 flags |= HAL_TXDESC_RTSENA; 3888 else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) 3889 flags |= HAL_TXDESC_CTSENA; 3890 if (isfrag) { 3891 /* 3892 * For frags it would be desirable to use the 3893 * highest CCK rate for RTS/CTS. But stations 3894 * farther away may detect it at a lower CCK rate 3895 * so use the configured protection rate instead 3896 * (for now). 3897 */ 3898 cix = rt->info[sc->sc_protrix].controlRate; 3899 } else 3900 cix = rt->info[sc->sc_protrix].controlRate; 3901 sc->sc_stats.ast_tx_protect++; 3902 } 3903 3904 /* 3905 * Calculate duration. This logically belongs in the 802.11 3906 * layer but it lacks sufficient information to calculate it. 3907 */ 3908 if ((flags & HAL_TXDESC_NOACK) == 0 && 3909 (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 3910 u_int16_t dur; 3911 /* 3912 * XXX not right with fragmentation. 3913 */ 3914 if (shortPreamble) 3915 dur = rt->info[rix].spAckDuration; 3916 else 3917 dur = rt->info[rix].lpAckDuration; 3918 if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 3919 dur += dur; /* additional SIFS+ACK */ 3920 KASSERTMSG(m0->m_nextpkt != NULL, "no fragment"); 3921 /* 3922 * Include the size of next fragment so NAV is 3923 * updated properly. The last fragment uses only 3924 * the ACK duration 3925 */ 3926 dur += ath_hal_computetxtime(ah, rt, 3927 deduct_pad_bytes(m0->m_nextpkt->m_pkthdr.len, 3928 hdrlen) - 3929 deduct_pad_bytes(m0->m_pkthdr.len, hdrlen) + pktlen, 3930 rix, shortPreamble); 3931 } 3932 if (isfrag) { 3933 /* 3934 * Force hardware to use computed duration for next 3935 * fragment by disabling multi-rate retry which updates 3936 * duration based on the multi-rate duration table. 3937 */ 3938 try0 = ATH_TXMAXTRY; 3939 } 3940 *(u_int16_t *)wh->i_dur = htole16(dur); 3941 } 3942 3943 /* 3944 * Calculate RTS/CTS rate and duration if needed. 3945 */ 3946 ctsduration = 0; 3947 if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) { 3948 /* 3949 * CTS transmit rate is derived from the transmit rate 3950 * by looking in the h/w rate table. We must also factor 3951 * in whether or not a short preamble is to be used. 3952 */ 3953 /* NB: cix is set above where RTS/CTS is enabled */ 3954 KASSERTMSG(cix != 0xff, "cix not setup"); 3955 ctsrate = rt->info[cix].rateCode; 3956 /* 3957 * Compute the transmit duration based on the frame 3958 * size and the size of an ACK frame. We call into the 3959 * HAL to do the computation since it depends on the 3960 * characteristics of the actual PHY being used. 3961 * 3962 * NB: CTS is assumed the same size as an ACK so we can 3963 * use the precalculated ACK durations. 3964 */ 3965 if (shortPreamble) { 3966 ctsrate |= rt->info[cix].shortPreamble; 3967 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 3968 ctsduration += rt->info[cix].spAckDuration; 3969 ctsduration += ath_hal_computetxtime(ah, 3970 rt, pktlen, rix, AH_TRUE); 3971 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 3972 ctsduration += rt->info[rix].spAckDuration; 3973 } else { 3974 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 3975 ctsduration += rt->info[cix].lpAckDuration; 3976 ctsduration += ath_hal_computetxtime(ah, 3977 rt, pktlen, rix, AH_FALSE); 3978 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 3979 ctsduration += rt->info[rix].lpAckDuration; 3980 } 3981 /* 3982 * Must disable multi-rate retry when using RTS/CTS. 3983 */ 3984 ismrr = 0; 3985 try0 = ATH_TXMGTTRY; /* XXX */ 3986 } else 3987 ctsrate = 0; 3988 3989 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 3990 ieee80211_dump_pkt(mtod(m0, void *), m0->m_len, 3991 sc->sc_hwmap[txrate].ieeerate, -1); 3992 bpf_mtap3(ic->ic_rawbpf, m0, BPF_D_OUT); 3993 if (sc->sc_drvbpf) { 3994 u_int64_t tsf = ath_hal_gettsf64(ah); 3995 3996 sc->sc_tx_th.wt_tsf = htole64(tsf); 3997 sc->sc_tx_th.wt_flags = sc->sc_hwmap[txrate].txflags; 3998 if (iswep) 3999 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 4000 if (isfrag) 4001 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 4002 sc->sc_tx_th.wt_rate = sc->sc_hwmap[txrate].ieeerate; 4003 sc->sc_tx_th.wt_txpower = ni->ni_txpower; 4004 sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 4005 4006 bpf_mtap2(sc->sc_drvbpf, &sc->sc_tx_th, sc->sc_tx_th_len, m0, 4007 BPF_D_OUT); 4008 } 4009 4010 /* 4011 * Determine if a tx interrupt should be generated for 4012 * this descriptor. We take a tx interrupt to reap 4013 * descriptors when the h/w hits an EOL condition or 4014 * when the descriptor is specifically marked to generate 4015 * an interrupt. We periodically mark descriptors in this 4016 * way to insure timely replenishing of the supply needed 4017 * for sending frames. Defering interrupts reduces system 4018 * load and potentially allows more concurrent work to be 4019 * done but if done to aggressively can cause senders to 4020 * backup. 4021 * 4022 * NB: use >= to deal with sc_txintrperiod changing 4023 * dynamically through sysctl. 4024 */ 4025 if (flags & HAL_TXDESC_INTREQ) { 4026 txq->axq_intrcnt = 0; 4027 } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 4028 flags |= HAL_TXDESC_INTREQ; 4029 txq->axq_intrcnt = 0; 4030 } 4031 4032 /* 4033 * Formulate first tx descriptor with tx controls. 4034 */ 4035 /* XXX check return value? */ 4036 ath_hal_setuptxdesc(ah, ds 4037 , pktlen /* packet length */ 4038 , hdrlen /* header length */ 4039 , atype /* Atheros packet type */ 4040 , ni->ni_txpower /* txpower */ 4041 , txrate, try0 /* series 0 rate/tries */ 4042 , keyix /* key cache index */ 4043 , sc->sc_txantenna /* antenna mode */ 4044 , flags /* flags */ 4045 , ctsrate /* rts/cts rate */ 4046 , ctsduration /* rts/cts duration */ 4047 ); 4048 bf->bf_flags = flags; 4049 /* 4050 * Setup the multi-rate retry state only when we're 4051 * going to use it. This assumes ath_hal_setuptxdesc 4052 * initializes the descriptors (so we don't have to) 4053 * when the hardware supports multi-rate retry and 4054 * we don't use it. 4055 */ 4056 if (ismrr) 4057 ath_rate_setupxtxdesc(sc, an, ds, shortPreamble, rix); 4058 4059 /* 4060 * Fillin the remainder of the descriptor info. 4061 */ 4062 ds0 = ds; 4063 for (i = 0; i < bf->bf_nseg; i++, ds++) { 4064 ds->ds_data = bf->bf_segs[i].ds_addr; 4065 if (i == bf->bf_nseg - 1) 4066 ds->ds_link = 0; 4067 else 4068 ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 4069 ath_hal_filltxdesc(ah, ds 4070 , bf->bf_segs[i].ds_len /* segment length */ 4071 , i == 0 /* first segment */ 4072 , i == bf->bf_nseg - 1 /* last segment */ 4073 , ds0 /* first descriptor */ 4074 ); 4075 4076 /* NB: The desc swap function becomes void, 4077 * if descriptor swapping is not enabled 4078 */ 4079 ath_desc_swap(ds); 4080 4081 DPRINTF(sc, ATH_DEBUG_XMIT, 4082 "%s: %d: %08x %08x %08x %08x %08x %08x\n", 4083 __func__, i, ds->ds_link, ds->ds_data, 4084 ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 4085 } 4086 /* 4087 * Insert the frame on the outbound list and 4088 * pass it on to the hardware. 4089 */ 4090 ATH_TXQ_LOCK(txq); 4091 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 4092 if (txq->axq_link == NULL) { 4093 ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 4094 DPRINTF(sc, ATH_DEBUG_XMIT, 4095 "%s: TXDP[%u] = %" PRIx64 " (%p) depth %d\n", __func__, 4096 txq->axq_qnum, (uint64_t)bf->bf_daddr, bf->bf_desc, 4097 txq->axq_depth); 4098 } else { 4099 *txq->axq_link = HTOAH32(bf->bf_daddr); 4100 DPRINTF(sc, ATH_DEBUG_XMIT, 4101 "%s: link[%u](%p)=%" PRIx64 " (%p) depth %d\n", 4102 __func__, txq->axq_qnum, txq->axq_link, 4103 (uint64_t)bf->bf_daddr, bf->bf_desc, txq->axq_depth); 4104 } 4105 txq->axq_link = &bf->bf_desc[bf->bf_nseg - 1].ds_link; 4106 /* 4107 * The CAB queue is started from the SWBA handler since 4108 * frames only go out on DTIM and to avoid possible races. 4109 */ 4110 if (txq != sc->sc_cabq) 4111 ath_hal_txstart(ah, txq->axq_qnum); 4112 ATH_TXQ_UNLOCK(txq); 4113 4114 return 0; 4115 } 4116 4117 /* 4118 * Process completed xmit descriptors from the specified queue. 4119 */ 4120 static int 4121 ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) 4122 { 4123 struct ath_hal *ah = sc->sc_ah; 4124 struct ieee80211com *ic = &sc->sc_ic; 4125 struct ath_buf *bf; 4126 struct ath_desc *ds, *ds0; 4127 struct ieee80211_node *ni; 4128 struct ath_node *an; 4129 int sr, lr, pri, nacked; 4130 HAL_STATUS status; 4131 4132 DPRINTF(sc, ATH_DEBUG_TX_PROC, "%s: tx queue %u head %p link %p\n", 4133 __func__, txq->axq_qnum, 4134 (void *)(uintptr_t) ath_hal_gettxbuf(sc->sc_ah, txq->axq_qnum), 4135 txq->axq_link); 4136 nacked = 0; 4137 for (;;) { 4138 ATH_TXQ_LOCK(txq); 4139 txq->axq_intrcnt = 0; /* reset periodic desc intr count */ 4140 bf = STAILQ_FIRST(&txq->axq_q); 4141 if (bf == NULL) { 4142 txq->axq_link = NULL; 4143 ATH_TXQ_UNLOCK(txq); 4144 break; 4145 } 4146 ds0 = &bf->bf_desc[0]; 4147 ds = &bf->bf_desc[bf->bf_nseg - 1]; 4148 status = ath_hal_txprocdesc(ah, ds, &ds->ds_txstat); 4149 if (sc->sc_debug & ATH_DEBUG_XMIT_DESC) 4150 ath_printtxbuf(bf, status == HAL_OK); 4151 if (status == HAL_EINPROGRESS) { 4152 ATH_TXQ_UNLOCK(txq); 4153 break; 4154 } 4155 ATH_TXQ_REMOVE_HEAD(txq, bf_list); 4156 ATH_TXQ_UNLOCK(txq); 4157 4158 ni = bf->bf_node; 4159 if (ni != NULL) { 4160 an = ATH_NODE(ni); 4161 if (ds->ds_txstat.ts_status == 0) { 4162 u_int8_t txant = ds->ds_txstat.ts_antenna; 4163 sc->sc_stats.ast_ant_tx[txant]++; 4164 sc->sc_ant_tx[txant]++; 4165 if (ds->ds_txstat.ts_rate & HAL_TXSTAT_ALTRATE) 4166 sc->sc_stats.ast_tx_altrate++; 4167 sc->sc_stats.ast_tx_rssi = 4168 ds->ds_txstat.ts_rssi; 4169 ATH_RSSI_LPF(sc->sc_halstats.ns_avgtxrssi, 4170 ds->ds_txstat.ts_rssi); 4171 pri = M_WME_GETAC(bf->bf_m); 4172 if (pri >= WME_AC_VO) 4173 ic->ic_wme.wme_hipri_traffic++; 4174 ni->ni_inact = ni->ni_inact_reload; 4175 } else { 4176 if (ds->ds_txstat.ts_status & HAL_TXERR_XRETRY) 4177 sc->sc_stats.ast_tx_xretries++; 4178 if (ds->ds_txstat.ts_status & HAL_TXERR_FIFO) 4179 sc->sc_stats.ast_tx_fifoerr++; 4180 if (ds->ds_txstat.ts_status & HAL_TXERR_FILT) 4181 sc->sc_stats.ast_tx_filtered++; 4182 } 4183 sr = ds->ds_txstat.ts_shortretry; 4184 lr = ds->ds_txstat.ts_longretry; 4185 sc->sc_stats.ast_tx_shortretry += sr; 4186 sc->sc_stats.ast_tx_longretry += lr; 4187 /* 4188 * Hand the descriptor to the rate control algorithm. 4189 */ 4190 if ((ds->ds_txstat.ts_status & HAL_TXERR_FILT) == 0 && 4191 (bf->bf_flags & HAL_TXDESC_NOACK) == 0) { 4192 /* 4193 * If frame was ack'd update the last rx time 4194 * used to workaround phantom bmiss interrupts. 4195 */ 4196 if (ds->ds_txstat.ts_status == 0) 4197 nacked++; 4198 ath_rate_tx_complete(sc, an, ds, ds0); 4199 } 4200 /* 4201 * Reclaim reference to node. 4202 * 4203 * NB: the node may be reclaimed here if, for example 4204 * this is a DEAUTH message that was sent and the 4205 * node was timed out due to inactivity. 4206 */ 4207 ieee80211_free_node(ni); 4208 } 4209 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 0, 4210 bf->bf_dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE); 4211 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 4212 m_freem(bf->bf_m); 4213 bf->bf_m = NULL; 4214 bf->bf_node = NULL; 4215 4216 ATH_TXBUF_LOCK(sc); 4217 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 4218 sc->sc_if.if_flags &= ~IFF_OACTIVE; 4219 ATH_TXBUF_UNLOCK(sc); 4220 } 4221 return nacked; 4222 } 4223 4224 static inline int 4225 txqactive(struct ath_hal *ah, int qnum) 4226 { 4227 u_int32_t txqs = 1<<qnum; 4228 ath_hal_gettxintrtxqs(ah, &txqs); 4229 return (txqs & (1<<qnum)); 4230 } 4231 4232 /* 4233 * Deferred processing of transmit interrupt; special-cased 4234 * for a single hardware transmit queue (e.g. 5210 and 5211). 4235 */ 4236 static void 4237 ath_tx_proc_q0(void *arg, int npending) 4238 { 4239 struct ath_softc *sc = arg; 4240 struct ifnet *ifp = &sc->sc_if; 4241 #ifdef __NetBSD__ 4242 int s; 4243 #endif 4244 4245 if (txqactive(sc->sc_ah, 0) && ath_tx_processq(sc, &sc->sc_txq[0]) > 0) 4246 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4247 4248 if (txqactive(sc->sc_ah, sc->sc_cabq->axq_qnum)) 4249 ath_tx_processq(sc, sc->sc_cabq); 4250 4251 if (sc->sc_softled) 4252 ath_led_event(sc, ATH_LED_TX); 4253 4254 #ifdef __NetBSD__ 4255 s = splnet(); 4256 #endif 4257 ath_start(ifp); 4258 #ifdef __NetBSD__ 4259 splx(s); 4260 #endif 4261 } 4262 4263 /* 4264 * Deferred processing of transmit interrupt; special-cased 4265 * for four hardware queues, 0-3 (e.g. 5212 w/ WME support). 4266 */ 4267 static void 4268 ath_tx_proc_q0123(void *arg, int npending) 4269 { 4270 struct ath_softc *sc = arg; 4271 struct ifnet *ifp = &sc->sc_if; 4272 int nacked; 4273 #ifdef __NetBSD__ 4274 int s; 4275 #endif 4276 4277 /* 4278 * Process each active queue. 4279 */ 4280 nacked = 0; 4281 if (txqactive(sc->sc_ah, 0)) 4282 nacked += ath_tx_processq(sc, &sc->sc_txq[0]); 4283 if (txqactive(sc->sc_ah, 1)) 4284 nacked += ath_tx_processq(sc, &sc->sc_txq[1]); 4285 if (txqactive(sc->sc_ah, 2)) 4286 nacked += ath_tx_processq(sc, &sc->sc_txq[2]); 4287 if (txqactive(sc->sc_ah, 3)) 4288 nacked += ath_tx_processq(sc, &sc->sc_txq[3]); 4289 if (txqactive(sc->sc_ah, sc->sc_cabq->axq_qnum)) 4290 ath_tx_processq(sc, sc->sc_cabq); 4291 if (nacked) { 4292 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4293 } 4294 4295 if (sc->sc_softled) 4296 ath_led_event(sc, ATH_LED_TX); 4297 4298 #ifdef __NetBSD__ 4299 s = splnet(); 4300 #endif 4301 ath_start(ifp); 4302 #ifdef __NetBSD__ 4303 splx(s); 4304 #endif 4305 } 4306 4307 /* 4308 * Deferred processing of transmit interrupt. 4309 */ 4310 static void 4311 ath_tx_proc(void *arg, int npending) 4312 { 4313 struct ath_softc *sc = arg; 4314 struct ifnet *ifp = &sc->sc_if; 4315 int i, nacked; 4316 #ifdef __NetBSD__ 4317 int s; 4318 #endif 4319 4320 /* 4321 * Process each active queue. 4322 */ 4323 nacked = 0; 4324 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4325 if (ATH_TXQ_SETUP(sc, i) && txqactive(sc->sc_ah, i)) 4326 nacked += ath_tx_processq(sc, &sc->sc_txq[i]); 4327 if (nacked) { 4328 sc->sc_lastrx = ath_hal_gettsf64(sc->sc_ah); 4329 } 4330 4331 if (sc->sc_softled) 4332 ath_led_event(sc, ATH_LED_TX); 4333 4334 #ifdef __NetBSD__ 4335 s = splnet(); 4336 #endif 4337 ath_start(ifp); 4338 #ifdef __NetBSD__ 4339 splx(s); 4340 #endif 4341 } 4342 4343 static void 4344 ath_tx_draintxq(struct ath_softc *sc, struct ath_txq *txq) 4345 { 4346 struct ath_hal *ah = sc->sc_ah; 4347 struct ieee80211_node *ni; 4348 struct ath_buf *bf; 4349 struct ath_desc *ds; 4350 4351 /* 4352 * NB: this assumes output has been stopped and 4353 * we do not need to block ath_tx_tasklet 4354 */ 4355 for (;;) { 4356 ATH_TXQ_LOCK(txq); 4357 bf = STAILQ_FIRST(&txq->axq_q); 4358 if (bf == NULL) { 4359 txq->axq_link = NULL; 4360 ATH_TXQ_UNLOCK(txq); 4361 break; 4362 } 4363 ATH_TXQ_REMOVE_HEAD(txq, bf_list); 4364 ATH_TXQ_UNLOCK(txq); 4365 ds = &bf->bf_desc[bf->bf_nseg - 1]; 4366 if (sc->sc_debug & ATH_DEBUG_RESET) 4367 ath_printtxbuf(bf, 4368 ath_hal_txprocdesc(ah, bf->bf_desc, 4369 &ds->ds_txstat) == HAL_OK); 4370 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 4371 m_freem(bf->bf_m); 4372 bf->bf_m = NULL; 4373 ni = bf->bf_node; 4374 bf->bf_node = NULL; 4375 if (ni != NULL) { 4376 /* 4377 * Reclaim node reference. 4378 */ 4379 ieee80211_free_node(ni); 4380 } 4381 ATH_TXBUF_LOCK(sc); 4382 STAILQ_INSERT_TAIL(&sc->sc_txbuf, bf, bf_list); 4383 sc->sc_if.if_flags &= ~IFF_OACTIVE; 4384 ATH_TXBUF_UNLOCK(sc); 4385 } 4386 } 4387 4388 static void 4389 ath_tx_stopdma(struct ath_softc *sc, struct ath_txq *txq) 4390 { 4391 struct ath_hal *ah = sc->sc_ah; 4392 4393 (void) ath_hal_stoptxdma(ah, txq->axq_qnum); 4394 DPRINTF(sc, ATH_DEBUG_RESET, "%s: tx queue [%u] %p, link %p\n", 4395 __func__, txq->axq_qnum, 4396 (void *)(uintptr_t) ath_hal_gettxbuf(ah, txq->axq_qnum), 4397 txq->axq_link); 4398 } 4399 4400 /* 4401 * Drain the transmit queues and reclaim resources. 4402 */ 4403 static void 4404 ath_draintxq(struct ath_softc *sc) 4405 { 4406 struct ath_hal *ah = sc->sc_ah; 4407 int i; 4408 4409 /* XXX return value */ 4410 if (device_is_active(sc->sc_dev)) { 4411 /* don't touch the hardware if marked invalid */ 4412 (void) ath_hal_stoptxdma(ah, sc->sc_bhalq); 4413 DPRINTF(sc, ATH_DEBUG_RESET, 4414 "%s: beacon queue %p\n", __func__, 4415 (void *)(uintptr_t) ath_hal_gettxbuf(ah, sc->sc_bhalq)); 4416 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4417 if (ATH_TXQ_SETUP(sc, i)) 4418 ath_tx_stopdma(sc, &sc->sc_txq[i]); 4419 } 4420 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) 4421 if (ATH_TXQ_SETUP(sc, i)) 4422 ath_tx_draintxq(sc, &sc->sc_txq[i]); 4423 } 4424 4425 /* 4426 * Disable the receive h/w in preparation for a reset. 4427 */ 4428 static void 4429 ath_stoprecv(struct ath_softc *sc) 4430 { 4431 #define PA2DESC(_sc, _pa) \ 4432 ((struct ath_desc *)((char *)(_sc)->sc_rxdma.dd_desc + \ 4433 ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr))) 4434 struct ath_hal *ah = sc->sc_ah; 4435 4436 ath_hal_stoppcurecv(ah); /* disable PCU */ 4437 ath_hal_setrxfilter(ah, 0); /* clear recv filter */ 4438 ath_hal_stopdmarecv(ah); /* disable DMA engine */ 4439 DELAY(3000); /* 3ms is long enough for 1 frame */ 4440 if (sc->sc_debug & (ATH_DEBUG_RESET | ATH_DEBUG_FATAL)) { 4441 struct ath_buf *bf; 4442 4443 printf("%s: rx queue %p, link %p\n", __func__, 4444 (void *)(uintptr_t) ath_hal_getrxbuf(ah), sc->sc_rxlink); 4445 STAILQ_FOREACH(bf, &sc->sc_rxbuf, bf_list) { 4446 struct ath_desc *ds = bf->bf_desc; 4447 HAL_STATUS status = ath_hal_rxprocdesc(ah, ds, 4448 bf->bf_daddr, PA2DESC(sc, ds->ds_link), 4449 &ds->ds_rxstat); 4450 if (status == HAL_OK || (sc->sc_debug & ATH_DEBUG_FATAL)) 4451 ath_printrxbuf(bf, status == HAL_OK); 4452 } 4453 } 4454 sc->sc_rxlink = NULL; /* just in case */ 4455 #undef PA2DESC 4456 } 4457 4458 /* 4459 * Enable the receive h/w following a reset. 4460 */ 4461 static int 4462 ath_startrecv(struct ath_softc *sc) 4463 { 4464 struct ath_hal *ah = sc->sc_ah; 4465 struct ath_buf *bf; 4466 4467 sc->sc_rxlink = NULL; 4468 STAILQ_FOREACH(bf, &sc->sc_rxbuf, bf_list) { 4469 int error = ath_rxbuf_init(sc, bf); 4470 if (error != 0) { 4471 DPRINTF(sc, ATH_DEBUG_RECV, 4472 "%s: ath_rxbuf_init failed %d\n", 4473 __func__, error); 4474 return error; 4475 } 4476 } 4477 4478 bf = STAILQ_FIRST(&sc->sc_rxbuf); 4479 ath_hal_putrxbuf(ah, bf->bf_daddr); 4480 ath_hal_rxena(ah); /* enable recv descriptors */ 4481 ath_mode_init(sc); /* set filters, etc. */ 4482 ath_hal_startpcurecv(ah); /* re-enable PCU/DMA engine */ 4483 return 0; 4484 } 4485 4486 /* 4487 * Update internal state after a channel change. 4488 */ 4489 static void 4490 ath_chan_change(struct ath_softc *sc, struct ieee80211_channel *chan) 4491 { 4492 struct ieee80211com *ic = &sc->sc_ic; 4493 enum ieee80211_phymode mode; 4494 u_int16_t flags; 4495 4496 /* 4497 * Change channels and update the h/w rate map 4498 * if we're switching; e.g. 11a to 11b/g. 4499 */ 4500 mode = ieee80211_chan2mode(ic, chan); 4501 if (mode != sc->sc_curmode) 4502 ath_setcurmode(sc, mode); 4503 /* 4504 * Update BPF state. NB: ethereal et. al. don't handle 4505 * merged flags well so pick a unique mode for their use. 4506 */ 4507 if (IEEE80211_IS_CHAN_A(chan)) 4508 flags = IEEE80211_CHAN_A; 4509 /* XXX 11g schizophrenia */ 4510 else if (IEEE80211_IS_CHAN_G(chan) || 4511 IEEE80211_IS_CHAN_PUREG(chan)) 4512 flags = IEEE80211_CHAN_G; 4513 else 4514 flags = IEEE80211_CHAN_B; 4515 if (IEEE80211_IS_CHAN_T(chan)) 4516 flags |= IEEE80211_CHAN_TURBO; 4517 sc->sc_tx_th.wt_chan_freq = sc->sc_rx_th.wr_chan_freq = 4518 htole16(chan->ic_freq); 4519 sc->sc_tx_th.wt_chan_flags = sc->sc_rx_th.wr_chan_flags = 4520 htole16(flags); 4521 } 4522 4523 #if 0 4524 /* 4525 * Poll for a channel clear indication; this is required 4526 * for channels requiring DFS and not previously visited 4527 * and/or with a recent radar detection. 4528 */ 4529 static void 4530 ath_dfswait(void *arg) 4531 { 4532 struct ath_softc *sc = arg; 4533 struct ath_hal *ah = sc->sc_ah; 4534 HAL_CHANNEL hchan; 4535 4536 ath_hal_radar_wait(ah, &hchan); 4537 if (hchan.privFlags & CHANNEL_INTERFERENCE) { 4538 if_printf(&sc->sc_if, 4539 "channel %u/0x%x/0x%x has interference\n", 4540 hchan.channel, hchan.channelFlags, hchan.privFlags); 4541 return; 4542 } 4543 if ((hchan.privFlags & CHANNEL_DFS) == 0) { 4544 /* XXX should not happen */ 4545 return; 4546 } 4547 if (hchan.privFlags & CHANNEL_DFS_CLEAR) { 4548 sc->sc_curchan.privFlags |= CHANNEL_DFS_CLEAR; 4549 sc->sc_if.if_flags &= ~IFF_OACTIVE; 4550 if_printf(&sc->sc_if, 4551 "channel %u/0x%x/0x%x marked clear\n", 4552 hchan.channel, hchan.channelFlags, hchan.privFlags); 4553 } else 4554 callout_reset(&sc->sc_dfs_ch, 2 * hz, ath_dfswait, sc); 4555 } 4556 #endif 4557 4558 /* 4559 * Set/change channels. If the channel is really being changed, 4560 * it's done by reseting the chip. To accomplish this we must 4561 * first cleanup any pending DMA, then restart stuff after a la 4562 * ath_init. 4563 */ 4564 static int 4565 ath_chan_set(struct ath_softc *sc, struct ieee80211_channel *chan) 4566 { 4567 struct ath_hal *ah = sc->sc_ah; 4568 struct ieee80211com *ic = &sc->sc_ic; 4569 HAL_CHANNEL hchan; 4570 4571 /* 4572 * Convert to a HAL channel description with 4573 * the flags constrained to reflect the current 4574 * operating mode. 4575 */ 4576 hchan.channel = chan->ic_freq; 4577 hchan.channelFlags = ath_chan2flags(ic, chan); 4578 4579 DPRINTF(sc, ATH_DEBUG_RESET, 4580 "%s: %u (%u MHz, hal flags 0x%x) -> %u (%u MHz, hal flags 0x%x)\n", 4581 __func__, 4582 ath_hal_mhz2ieee(ah, sc->sc_curchan.channel, 4583 sc->sc_curchan.channelFlags), 4584 sc->sc_curchan.channel, sc->sc_curchan.channelFlags, 4585 ath_hal_mhz2ieee(ah, hchan.channel, hchan.channelFlags), 4586 hchan.channel, hchan.channelFlags); 4587 if (hchan.channel != sc->sc_curchan.channel || 4588 hchan.channelFlags != sc->sc_curchan.channelFlags) { 4589 HAL_STATUS status; 4590 4591 /* 4592 * To switch channels clear any pending DMA operations; 4593 * wait long enough for the RX fifo to drain, reset the 4594 * hardware at the new frequency, and then re-enable 4595 * the relevant bits of the h/w. 4596 */ 4597 ath_hal_intrset(ah, 0); /* disable interrupts */ 4598 ath_draintxq(sc); /* clear pending tx frames */ 4599 ath_stoprecv(sc); /* turn off frame recv */ 4600 if (!ath_hal_reset(ah, ic->ic_opmode, &hchan, AH_TRUE, &status)) { 4601 if_printf(ic->ic_ifp, "%s: unable to reset " 4602 "channel %u (%u MHz, flags 0x%x hal flags 0x%x)\n", 4603 __func__, ieee80211_chan2ieee(ic, chan), 4604 chan->ic_freq, chan->ic_flags, hchan.channelFlags); 4605 return EIO; 4606 } 4607 sc->sc_curchan = hchan; 4608 ath_update_txpow(sc); /* update tx power state */ 4609 ath_restore_diversity(sc); 4610 sc->sc_calinterval = 1; 4611 sc->sc_caltries = 0; 4612 4613 /* 4614 * Re-enable rx framework. 4615 */ 4616 if (ath_startrecv(sc) != 0) { 4617 if_printf(&sc->sc_if, 4618 "%s: unable to restart recv logic\n", __func__); 4619 return EIO; 4620 } 4621 4622 /* 4623 * Change channels and update the h/w rate map 4624 * if we're switching; e.g. 11a to 11b/g. 4625 */ 4626 ic->ic_ibss_chan = chan; 4627 ath_chan_change(sc, chan); 4628 4629 #if 0 4630 /* 4631 * Handle DFS required waiting period to determine 4632 * if channel is clear of radar traffic. 4633 */ 4634 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 4635 #define DFS_AND_NOT_CLEAR(_c) \ 4636 (((_c)->privFlags & (CHANNEL_DFS | CHANNEL_DFS_CLEAR)) == CHANNEL_DFS) 4637 if (DFS_AND_NOT_CLEAR(&sc->sc_curchan)) { 4638 if_printf(&sc->sc_if, 4639 "wait for DFS clear channel signal\n"); 4640 /* XXX stop sndq */ 4641 sc->sc_if.if_flags |= IFF_OACTIVE; 4642 callout_reset(&sc->sc_dfs_ch, 4643 2 * hz, ath_dfswait, sc); 4644 } else 4645 callout_stop(&sc->sc_dfs_ch); 4646 #undef DFS_NOT_CLEAR 4647 } 4648 #endif 4649 4650 /* 4651 * Re-enable interrupts. 4652 */ 4653 ath_hal_intrset(ah, sc->sc_imask); 4654 } 4655 return 0; 4656 } 4657 4658 static void 4659 ath_next_scan(void *arg) 4660 { 4661 struct ath_softc *sc = arg; 4662 struct ieee80211com *ic = &sc->sc_ic; 4663 int s; 4664 4665 /* don't call ath_start w/o network interrupts blocked */ 4666 s = splnet(); 4667 4668 if (ic->ic_state == IEEE80211_S_SCAN) 4669 ieee80211_next_scan(ic); 4670 splx(s); 4671 } 4672 4673 /* 4674 * Periodically recalibrate the PHY to account 4675 * for temperature/environment changes. 4676 */ 4677 static void 4678 ath_calibrate(void *arg) 4679 { 4680 struct ath_softc *sc = arg; 4681 struct ath_hal *ah = sc->sc_ah; 4682 HAL_BOOL iqCalDone; 4683 int s; 4684 4685 sc->sc_stats.ast_per_cal++; 4686 4687 s = splnet(); 4688 4689 if (ath_hal_getrfgain(ah) == HAL_RFGAIN_NEED_CHANGE) { 4690 /* 4691 * Rfgain is out of bounds, reset the chip 4692 * to load new gain values. 4693 */ 4694 DPRINTF(sc, ATH_DEBUG_CALIBRATE, 4695 "%s: rfgain change\n", __func__); 4696 sc->sc_stats.ast_per_rfgain++; 4697 ath_reset(&sc->sc_if); 4698 } 4699 if (!ath_hal_calibrate(ah, &sc->sc_curchan, &iqCalDone)) { 4700 DPRINTF(sc, ATH_DEBUG_ANY, 4701 "%s: calibration of channel %u failed\n", 4702 __func__, sc->sc_curchan.channel); 4703 sc->sc_stats.ast_per_calfail++; 4704 } 4705 /* 4706 * Calibrate noise floor data again in case of change. 4707 */ 4708 ath_hal_process_noisefloor(ah); 4709 /* 4710 * Poll more frequently when the IQ calibration is in 4711 * progress to speedup loading the final settings. 4712 * We temper this aggressive polling with an exponential 4713 * back off after 4 tries up to ath_calinterval. 4714 */ 4715 if (iqCalDone || sc->sc_calinterval >= ath_calinterval) { 4716 sc->sc_caltries = 0; 4717 sc->sc_calinterval = ath_calinterval; 4718 } else if (sc->sc_caltries > 4) { 4719 sc->sc_caltries = 0; 4720 sc->sc_calinterval <<= 1; 4721 if (sc->sc_calinterval > ath_calinterval) 4722 sc->sc_calinterval = ath_calinterval; 4723 } 4724 KASSERTMSG(0 < sc->sc_calinterval && 4725 sc->sc_calinterval <= ath_calinterval, 4726 "bad calibration interval %u", sc->sc_calinterval); 4727 4728 DPRINTF(sc, ATH_DEBUG_CALIBRATE, 4729 "%s: next +%u (%siqCalDone tries %u)\n", __func__, 4730 sc->sc_calinterval, iqCalDone ? "" : "!", sc->sc_caltries); 4731 sc->sc_caltries++; 4732 callout_reset(&sc->sc_cal_ch, sc->sc_calinterval * hz, 4733 ath_calibrate, sc); 4734 splx(s); 4735 } 4736 4737 static int 4738 ath_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 4739 { 4740 struct ifnet *ifp = ic->ic_ifp; 4741 struct ath_softc *sc = ifp->if_softc; 4742 struct ath_hal *ah = sc->sc_ah; 4743 struct ieee80211_node *ni; 4744 int i, error; 4745 const u_int8_t *bssid; 4746 u_int32_t rfilt; 4747 static const HAL_LED_STATE leds[] = { 4748 HAL_LED_INIT, /* IEEE80211_S_INIT */ 4749 HAL_LED_SCAN, /* IEEE80211_S_SCAN */ 4750 HAL_LED_AUTH, /* IEEE80211_S_AUTH */ 4751 HAL_LED_ASSOC, /* IEEE80211_S_ASSOC */ 4752 HAL_LED_RUN, /* IEEE80211_S_RUN */ 4753 }; 4754 4755 DPRINTF(sc, ATH_DEBUG_STATE, "%s: %s -> %s\n", __func__, 4756 ieee80211_state_name[ic->ic_state], 4757 ieee80211_state_name[nstate]); 4758 4759 callout_stop(&sc->sc_scan_ch); 4760 callout_stop(&sc->sc_cal_ch); 4761 #if 0 4762 callout_stop(&sc->sc_dfs_ch); 4763 #endif 4764 ath_hal_setledstate(ah, leds[nstate]); /* set LED */ 4765 4766 if (nstate == IEEE80211_S_INIT) { 4767 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 4768 /* 4769 * NB: disable interrupts so we don't rx frames. 4770 */ 4771 ath_hal_intrset(ah, sc->sc_imask &~ HAL_INT_GLOBAL); 4772 /* 4773 * Notify the rate control algorithm. 4774 */ 4775 ath_rate_newstate(sc, nstate); 4776 goto done; 4777 } 4778 ni = ic->ic_bss; 4779 error = ath_chan_set(sc, ic->ic_curchan); 4780 if (error != 0) 4781 goto bad; 4782 rfilt = ath_calcrxfilter(sc, nstate); 4783 if (nstate == IEEE80211_S_SCAN) 4784 bssid = ifp->if_broadcastaddr; 4785 else 4786 bssid = ni->ni_bssid; 4787 ath_hal_setrxfilter(ah, rfilt); 4788 DPRINTF(sc, ATH_DEBUG_STATE, "%s: RX filter 0x%x bssid %s\n", 4789 __func__, rfilt, ether_sprintf(bssid)); 4790 4791 if (nstate == IEEE80211_S_RUN && ic->ic_opmode == IEEE80211_M_STA) 4792 ath_hal_setassocid(ah, bssid, ni->ni_associd); 4793 else 4794 ath_hal_setassocid(ah, bssid, 0); 4795 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 4796 for (i = 0; i < IEEE80211_WEP_NKID; i++) 4797 if (ath_hal_keyisvalid(ah, i)) 4798 ath_hal_keysetmac(ah, i, bssid); 4799 } 4800 4801 /* 4802 * Notify the rate control algorithm so rates 4803 * are setup should ath_beacon_alloc be called. 4804 */ 4805 ath_rate_newstate(sc, nstate); 4806 4807 if (ic->ic_opmode == IEEE80211_M_MONITOR) { 4808 /* nothing to do */; 4809 } else if (nstate == IEEE80211_S_RUN) { 4810 DPRINTF(sc, ATH_DEBUG_STATE, 4811 "%s(RUN): ic_flags=0x%08x iv=%d bssid=%s " 4812 "capinfo=0x%04x chan=%d\n" 4813 , __func__ 4814 , ic->ic_flags 4815 , ni->ni_intval 4816 , ether_sprintf(ni->ni_bssid) 4817 , ni->ni_capinfo 4818 , ieee80211_chan2ieee(ic, ic->ic_curchan)); 4819 4820 switch (ic->ic_opmode) { 4821 case IEEE80211_M_HOSTAP: 4822 case IEEE80211_M_IBSS: 4823 /* 4824 * Allocate and setup the beacon frame. 4825 * 4826 * Stop any previous beacon DMA. This may be 4827 * necessary, for example, when an ibss merge 4828 * causes reconfiguration; there will be a state 4829 * transition from RUN->RUN that means we may 4830 * be called with beacon transmission active. 4831 */ 4832 ath_hal_stoptxdma(ah, sc->sc_bhalq); 4833 ath_beacon_free(sc); 4834 error = ath_beacon_alloc(sc, ni); 4835 if (error != 0) 4836 goto bad; 4837 /* 4838 * If joining an adhoc network defer beacon timer 4839 * configuration to the next beacon frame so we 4840 * have a current TSF to use. Otherwise we're 4841 * starting an ibss/bss so there's no need to delay. 4842 */ 4843 if (ic->ic_opmode == IEEE80211_M_IBSS && 4844 ic->ic_bss->ni_tstamp.tsf != 0) 4845 sc->sc_syncbeacon = 1; 4846 else 4847 ath_beacon_config(sc); 4848 break; 4849 case IEEE80211_M_STA: 4850 /* 4851 * Allocate a key cache slot to the station. 4852 */ 4853 if ((ic->ic_flags & IEEE80211_F_PRIVACY) == 0 && 4854 sc->sc_hasclrkey && 4855 ni->ni_ucastkey.wk_keyix == IEEE80211_KEYIX_NONE) 4856 ath_setup_stationkey(ni); 4857 /* 4858 * Defer beacon timer configuration to the next 4859 * beacon frame so we have a current TSF to use 4860 * (any TSF collected when scanning is likely old). 4861 */ 4862 sc->sc_syncbeacon = 1; 4863 break; 4864 default: 4865 break; 4866 } 4867 /* 4868 * Let the hal process statistics collected during a 4869 * scan so it can provide calibrated noise floor data. 4870 */ 4871 ath_hal_process_noisefloor(ah); 4872 /* 4873 * Reset rssi stats; maybe not the best place... 4874 */ 4875 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER; 4876 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER; 4877 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER; 4878 } else { 4879 ath_hal_intrset(ah, 4880 sc->sc_imask &~ (HAL_INT_SWBA | HAL_INT_BMISS)); 4881 sc->sc_imask &= ~(HAL_INT_SWBA | HAL_INT_BMISS); 4882 } 4883 done: 4884 /* 4885 * Invoke the parent method to complete the work. 4886 */ 4887 error = sc->sc_newstate(ic, nstate, arg); 4888 /* 4889 * Finally, start any timers. 4890 */ 4891 if (nstate == IEEE80211_S_RUN) { 4892 /* start periodic recalibration timer */ 4893 callout_reset(&sc->sc_cal_ch, sc->sc_calinterval * hz, 4894 ath_calibrate, sc); 4895 } else if (nstate == IEEE80211_S_SCAN) { 4896 /* start ap/neighbor scan timer */ 4897 callout_reset(&sc->sc_scan_ch, (ath_dwelltime * hz) / 1000, 4898 ath_next_scan, sc); 4899 } 4900 bad: 4901 return error; 4902 } 4903 4904 /* 4905 * Allocate a key cache slot to the station so we can 4906 * setup a mapping from key index to node. The key cache 4907 * slot is needed for managing antenna state and for 4908 * compression when stations do not use crypto. We do 4909 * it uniliaterally here; if crypto is employed this slot 4910 * will be reassigned. 4911 */ 4912 static void 4913 ath_setup_stationkey(struct ieee80211_node *ni) 4914 { 4915 struct ieee80211com *ic = ni->ni_ic; 4916 struct ath_softc *sc = ic->ic_ifp->if_softc; 4917 ieee80211_keyix keyix, rxkeyix; 4918 4919 if (!ath_key_alloc(ic, &ni->ni_ucastkey, &keyix, &rxkeyix)) { 4920 /* 4921 * Key cache is full; we'll fall back to doing 4922 * the more expensive lookup in software. Note 4923 * this also means no h/w compression. 4924 */ 4925 /* XXX msg+statistic */ 4926 } else { 4927 /* XXX locking? */ 4928 ni->ni_ucastkey.wk_keyix = keyix; 4929 ni->ni_ucastkey.wk_rxkeyix = rxkeyix; 4930 /* NB: this will create a pass-thru key entry */ 4931 ath_keyset(sc, &ni->ni_ucastkey, ni->ni_macaddr, ic->ic_bss); 4932 } 4933 } 4934 4935 /* 4936 * Setup driver-specific state for a newly associated node. 4937 * Note that we're called also on a re-associate, the isnew 4938 * param tells us if this is the first time or not. 4939 */ 4940 static void 4941 ath_newassoc(struct ieee80211_node *ni, int isnew) 4942 { 4943 struct ieee80211com *ic = ni->ni_ic; 4944 struct ath_softc *sc = ic->ic_ifp->if_softc; 4945 4946 ath_rate_newassoc(sc, ATH_NODE(ni), isnew); 4947 if (isnew && 4948 (ic->ic_flags & IEEE80211_F_PRIVACY) == 0 && sc->sc_hasclrkey) { 4949 KASSERTMSG(ni->ni_ucastkey.wk_keyix == IEEE80211_KEYIX_NONE, 4950 "new assoc with a unicast key already setup (keyix %u)", 4951 ni->ni_ucastkey.wk_keyix); 4952 ath_setup_stationkey(ni); 4953 } 4954 } 4955 4956 static int 4957 ath_getchannels(struct ath_softc *sc, u_int cc, 4958 HAL_BOOL outdoor, HAL_BOOL xchanmode) 4959 { 4960 #define COMPAT (CHANNEL_ALL_NOTURBO|CHANNEL_PASSIVE) 4961 struct ieee80211com *ic = &sc->sc_ic; 4962 struct ifnet *ifp = &sc->sc_if; 4963 struct ath_hal *ah = sc->sc_ah; 4964 HAL_CHANNEL *chans; 4965 int i, ix, nchan; 4966 4967 chans = malloc(IEEE80211_CHAN_MAX * sizeof(HAL_CHANNEL), 4968 M_TEMP, M_NOWAIT); 4969 if (chans == NULL) { 4970 if_printf(ifp, "unable to allocate channel table\n"); 4971 return ENOMEM; 4972 } 4973 if (!ath_hal_init_channels(ah, chans, IEEE80211_CHAN_MAX, &nchan, 4974 NULL, 0, NULL, 4975 cc, HAL_MODE_ALL, outdoor, xchanmode)) { 4976 u_int32_t rd; 4977 4978 (void)ath_hal_getregdomain(ah, &rd); 4979 if_printf(ifp, "unable to collect channel list from hal; " 4980 "regdomain likely %u country code %u\n", rd, cc); 4981 free(chans, M_TEMP); 4982 return EINVAL; 4983 } 4984 4985 /* 4986 * Convert HAL channels to ieee80211 ones and insert 4987 * them in the table according to their channel number. 4988 */ 4989 for (i = 0; i < nchan; i++) { 4990 HAL_CHANNEL *c = &chans[i]; 4991 u_int16_t flags; 4992 4993 ix = ath_hal_mhz2ieee(ah, c->channel, c->channelFlags); 4994 if (ix > IEEE80211_CHAN_MAX) { 4995 if_printf(ifp, "bad hal channel %d (%u/%x) ignored\n", 4996 ix, c->channel, c->channelFlags); 4997 continue; 4998 } 4999 if (ix < 0) { 5000 /* XXX can't handle stuff <2400 right now */ 5001 if (bootverbose) 5002 if_printf(ifp, "hal channel %d (%u/%x) " 5003 "cannot be handled; ignored\n", 5004 ix, c->channel, c->channelFlags); 5005 continue; 5006 } 5007 /* 5008 * Calculate net80211 flags; most are compatible 5009 * but some need massaging. Note the static turbo 5010 * conversion can be removed once net80211 is updated 5011 * to understand static vs. dynamic turbo. 5012 */ 5013 flags = c->channelFlags & COMPAT; 5014 if (c->channelFlags & CHANNEL_STURBO) 5015 flags |= IEEE80211_CHAN_TURBO; 5016 if (ic->ic_channels[ix].ic_freq == 0) { 5017 ic->ic_channels[ix].ic_freq = c->channel; 5018 ic->ic_channels[ix].ic_flags = flags; 5019 } else { 5020 /* channels overlap; e.g. 11g and 11b */ 5021 ic->ic_channels[ix].ic_flags |= flags; 5022 } 5023 } 5024 free(chans, M_TEMP); 5025 return 0; 5026 #undef COMPAT 5027 } 5028 5029 static void 5030 ath_led_done(void *arg) 5031 { 5032 struct ath_softc *sc = arg; 5033 5034 sc->sc_blinking = 0; 5035 } 5036 5037 /* 5038 * Turn the LED off: flip the pin and then set a timer so no 5039 * update will happen for the specified duration. 5040 */ 5041 static void 5042 ath_led_off(void *arg) 5043 { 5044 struct ath_softc *sc = arg; 5045 5046 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, !sc->sc_ledon); 5047 callout_reset(&sc->sc_ledtimer, sc->sc_ledoff, ath_led_done, sc); 5048 } 5049 5050 /* 5051 * Blink the LED according to the specified on/off times. 5052 */ 5053 static void 5054 ath_led_blink(struct ath_softc *sc, int on, int off) 5055 { 5056 DPRINTF(sc, ATH_DEBUG_LED, "%s: on %u off %u\n", __func__, on, off); 5057 ath_hal_gpioset(sc->sc_ah, sc->sc_ledpin, sc->sc_ledon); 5058 sc->sc_blinking = 1; 5059 sc->sc_ledoff = off; 5060 callout_reset(&sc->sc_ledtimer, on, ath_led_off, sc); 5061 } 5062 5063 static void 5064 ath_led_event(struct ath_softc *sc, int event) 5065 { 5066 5067 sc->sc_ledevent = ticks; /* time of last event */ 5068 if (sc->sc_blinking) /* don't interrupt active blink */ 5069 return; 5070 switch (event) { 5071 case ATH_LED_POLL: 5072 ath_led_blink(sc, sc->sc_hwmap[0].ledon, 5073 sc->sc_hwmap[0].ledoff); 5074 break; 5075 case ATH_LED_TX: 5076 ath_led_blink(sc, sc->sc_hwmap[sc->sc_txrate].ledon, 5077 sc->sc_hwmap[sc->sc_txrate].ledoff); 5078 break; 5079 case ATH_LED_RX: 5080 ath_led_blink(sc, sc->sc_hwmap[sc->sc_rxrate].ledon, 5081 sc->sc_hwmap[sc->sc_rxrate].ledoff); 5082 break; 5083 } 5084 } 5085 5086 static void 5087 ath_update_txpow(struct ath_softc *sc) 5088 { 5089 #define COMPAT (CHANNEL_ALL_NOTURBO|CHANNEL_PASSIVE) 5090 struct ieee80211com *ic = &sc->sc_ic; 5091 struct ath_hal *ah = sc->sc_ah; 5092 u_int32_t txpow; 5093 5094 if (sc->sc_curtxpow != ic->ic_txpowlimit) { 5095 ath_hal_settxpowlimit(ah, ic->ic_txpowlimit); 5096 /* read back in case value is clamped */ 5097 (void)ath_hal_gettxpowlimit(ah, &txpow); 5098 ic->ic_txpowlimit = sc->sc_curtxpow = txpow; 5099 } 5100 /* 5101 * Fetch max tx power level for status requests. 5102 */ 5103 (void)ath_hal_getmaxtxpow(sc->sc_ah, &txpow); 5104 ic->ic_bss->ni_txpower = txpow; 5105 } 5106 5107 static void 5108 rate_setup(struct ath_softc *sc, 5109 const HAL_RATE_TABLE *rt, struct ieee80211_rateset *rs) 5110 { 5111 int i, maxrates; 5112 5113 if (rt->rateCount > IEEE80211_RATE_MAXSIZE) { 5114 DPRINTF(sc, ATH_DEBUG_ANY, 5115 "%s: rate table too small (%u > %u)\n", 5116 __func__, rt->rateCount, IEEE80211_RATE_MAXSIZE); 5117 maxrates = IEEE80211_RATE_MAXSIZE; 5118 } else 5119 maxrates = rt->rateCount; 5120 for (i = 0; i < maxrates; i++) 5121 rs->rs_rates[i] = rt->info[i].dot11Rate; 5122 rs->rs_nrates = maxrates; 5123 } 5124 5125 static int 5126 ath_rate_setup(struct ath_softc *sc, u_int mode) 5127 { 5128 struct ath_hal *ah = sc->sc_ah; 5129 struct ieee80211com *ic = &sc->sc_ic; 5130 const HAL_RATE_TABLE *rt; 5131 5132 switch (mode) { 5133 case IEEE80211_MODE_11A: 5134 rt = ath_hal_getratetable(ah, HAL_MODE_11A); 5135 break; 5136 case IEEE80211_MODE_11B: 5137 rt = ath_hal_getratetable(ah, HAL_MODE_11B); 5138 break; 5139 case IEEE80211_MODE_11G: 5140 rt = ath_hal_getratetable(ah, HAL_MODE_11G); 5141 break; 5142 case IEEE80211_MODE_TURBO_A: 5143 /* XXX until static/dynamic turbo is fixed */ 5144 rt = ath_hal_getratetable(ah, HAL_MODE_TURBO); 5145 break; 5146 case IEEE80211_MODE_TURBO_G: 5147 rt = ath_hal_getratetable(ah, HAL_MODE_108G); 5148 break; 5149 default: 5150 DPRINTF(sc, ATH_DEBUG_ANY, "%s: invalid mode %u\n", 5151 __func__, mode); 5152 return 0; 5153 } 5154 sc->sc_rates[mode] = rt; 5155 if (rt != NULL) { 5156 rate_setup(sc, rt, &ic->ic_sup_rates[mode]); 5157 return 1; 5158 } else 5159 return 0; 5160 } 5161 5162 static void 5163 ath_setcurmode(struct ath_softc *sc, enum ieee80211_phymode mode) 5164 { 5165 #define N(a) (sizeof(a)/sizeof(a[0])) 5166 /* NB: on/off times from the Atheros NDIS driver, w/ permission */ 5167 static const struct { 5168 u_int rate; /* tx/rx 802.11 rate */ 5169 u_int16_t timeOn; /* LED on time (ms) */ 5170 u_int16_t timeOff; /* LED off time (ms) */ 5171 } blinkrates[] = { 5172 { 108, 40, 10 }, 5173 { 96, 44, 11 }, 5174 { 72, 50, 13 }, 5175 { 48, 57, 14 }, 5176 { 36, 67, 16 }, 5177 { 24, 80, 20 }, 5178 { 22, 100, 25 }, 5179 { 18, 133, 34 }, 5180 { 12, 160, 40 }, 5181 { 10, 200, 50 }, 5182 { 6, 240, 58 }, 5183 { 4, 267, 66 }, 5184 { 2, 400, 100 }, 5185 { 0, 500, 130 }, 5186 }; 5187 const HAL_RATE_TABLE *rt; 5188 int i, j; 5189 5190 memset(sc->sc_rixmap, 0xff, sizeof(sc->sc_rixmap)); 5191 rt = sc->sc_rates[mode]; 5192 KASSERTMSG(rt != NULL, "no h/w rate set for phy mode %u", mode); 5193 for (i = 0; i < rt->rateCount; i++) 5194 sc->sc_rixmap[rt->info[i].dot11Rate & IEEE80211_RATE_VAL] = i; 5195 memset(sc->sc_hwmap, 0, sizeof(sc->sc_hwmap)); 5196 for (i = 0; i < 32; i++) { 5197 u_int8_t ix = rt->rateCodeToIndex[i]; 5198 if (ix == 0xff) { 5199 sc->sc_hwmap[i].ledon = (500 * hz) / 1000; 5200 sc->sc_hwmap[i].ledoff = (130 * hz) / 1000; 5201 continue; 5202 } 5203 sc->sc_hwmap[i].ieeerate = 5204 rt->info[ix].dot11Rate & IEEE80211_RATE_VAL; 5205 sc->sc_hwmap[i].txflags = IEEE80211_RADIOTAP_F_DATAPAD; 5206 if (rt->info[ix].shortPreamble || 5207 rt->info[ix].phy == IEEE80211_T_OFDM) 5208 sc->sc_hwmap[i].txflags |= IEEE80211_RADIOTAP_F_SHORTPRE; 5209 /* NB: receive frames include FCS */ 5210 sc->sc_hwmap[i].rxflags = sc->sc_hwmap[i].txflags | 5211 IEEE80211_RADIOTAP_F_FCS; 5212 /* setup blink rate table to avoid per-packet lookup */ 5213 for (j = 0; j < N(blinkrates)-1; j++) 5214 if (blinkrates[j].rate == sc->sc_hwmap[i].ieeerate) 5215 break; 5216 /* NB: this uses the last entry if the rate isn't found */ 5217 /* XXX beware of overlow */ 5218 sc->sc_hwmap[i].ledon = (blinkrates[j].timeOn * hz) / 1000; 5219 sc->sc_hwmap[i].ledoff = (blinkrates[j].timeOff * hz) / 1000; 5220 } 5221 sc->sc_currates = rt; 5222 sc->sc_curmode = mode; 5223 /* 5224 * All protection frames are transmited at 2Mb/s for 5225 * 11g, otherwise at 1Mb/s. 5226 */ 5227 if (mode == IEEE80211_MODE_11G) 5228 sc->sc_protrix = ath_tx_findrix(rt, 2*2); 5229 else 5230 sc->sc_protrix = ath_tx_findrix(rt, 2*1); 5231 /* rate index used to send management frames */ 5232 sc->sc_minrateix = 0; 5233 /* 5234 * Setup multicast rate state. 5235 */ 5236 /* XXX layering violation */ 5237 sc->sc_mcastrix = ath_tx_findrix(rt, sc->sc_ic.ic_mcast_rate); 5238 sc->sc_mcastrate = sc->sc_ic.ic_mcast_rate; 5239 /* NB: caller is responsible for reseting rate control state */ 5240 #undef N 5241 } 5242 5243 #ifdef AR_DEBUG 5244 static void 5245 ath_printrxbuf(struct ath_buf *bf, int done) 5246 { 5247 struct ath_desc *ds; 5248 int i; 5249 5250 for (i = 0, ds = bf->bf_desc; i < bf->bf_nseg; i++, ds++) { 5251 printf("R%d (%p %" PRIx64 5252 ") %08x %08x %08x %08x %08x %08x %02x %02x %c\n", i, ds, 5253 (uint64_t)bf->bf_daddr + sizeof (struct ath_desc) * i, 5254 ds->ds_link, ds->ds_data, 5255 ds->ds_ctl0, ds->ds_ctl1, 5256 ds->ds_hw[0], ds->ds_hw[1], 5257 ds->ds_rxstat.rs_status, ds->ds_rxstat.rs_keyix, 5258 !done ? ' ' : (ds->ds_rxstat.rs_status == 0) ? '*' : '!'); 5259 } 5260 } 5261 5262 static void 5263 ath_printtxbuf(struct ath_buf *bf, int done) 5264 { 5265 struct ath_desc *ds; 5266 int i; 5267 5268 for (i = 0, ds = bf->bf_desc; i < bf->bf_nseg; i++, ds++) { 5269 printf("T%d (%p %" PRIx64 5270 ") %08x %08x %08x %08x %08x %08x %08x %08x %c\n", 5271 i, ds, 5272 (uint64_t)bf->bf_daddr + sizeof (struct ath_desc) * i, 5273 ds->ds_link, ds->ds_data, 5274 ds->ds_ctl0, ds->ds_ctl1, 5275 ds->ds_hw[0], ds->ds_hw[1], ds->ds_hw[2], ds->ds_hw[3], 5276 !done ? ' ' : (ds->ds_txstat.ts_status == 0) ? '*' : '!'); 5277 } 5278 } 5279 #endif /* AR_DEBUG */ 5280 5281 static void 5282 ath_watchdog(struct ifnet *ifp) 5283 { 5284 struct ath_softc *sc = ifp->if_softc; 5285 struct ieee80211com *ic = &sc->sc_ic; 5286 struct ath_txq *axq; 5287 int i; 5288 5289 ifp->if_timer = 0; 5290 if ((ifp->if_flags & IFF_RUNNING) == 0 || 5291 !device_is_active(sc->sc_dev)) 5292 return; 5293 for (i = 0; i < HAL_NUM_TX_QUEUES; i++) { 5294 if (!ATH_TXQ_SETUP(sc, i)) 5295 continue; 5296 axq = &sc->sc_txq[i]; 5297 ATH_TXQ_LOCK(axq); 5298 if (axq->axq_timer == 0) 5299 ; 5300 else if (--axq->axq_timer == 0) { 5301 ATH_TXQ_UNLOCK(axq); 5302 if_printf(ifp, "device timeout (txq %d, " 5303 "txintrperiod %d)\n", i, sc->sc_txintrperiod); 5304 if (sc->sc_txintrperiod > 1) 5305 sc->sc_txintrperiod--; 5306 ath_reset(ifp); 5307 ifp->if_oerrors++; 5308 sc->sc_stats.ast_watchdog++; 5309 break; 5310 } else 5311 ifp->if_timer = 1; 5312 ATH_TXQ_UNLOCK(axq); 5313 } 5314 ieee80211_watchdog(ic); 5315 } 5316 5317 /* 5318 * Diagnostic interface to the HAL. This is used by various 5319 * tools to do things like retrieve register contents for 5320 * debugging. The mechanism is intentionally opaque so that 5321 * it can change frequently w/o concern for compatiblity. 5322 */ 5323 static int 5324 ath_ioctl_diag(struct ath_softc *sc, struct ath_diag *ad) 5325 { 5326 struct ath_hal *ah = sc->sc_ah; 5327 u_int id = ad->ad_id & ATH_DIAG_ID; 5328 void *indata = NULL; 5329 void *outdata = NULL; 5330 u_int32_t insize = ad->ad_in_size; 5331 u_int32_t outsize = ad->ad_out_size; 5332 int error = 0; 5333 5334 if (ad->ad_id & ATH_DIAG_IN) { 5335 /* 5336 * Copy in data. 5337 */ 5338 indata = malloc(insize, M_TEMP, M_NOWAIT); 5339 if (indata == NULL) { 5340 error = ENOMEM; 5341 goto bad; 5342 } 5343 error = copyin(ad->ad_in_data, indata, insize); 5344 if (error) 5345 goto bad; 5346 } 5347 if (ad->ad_id & ATH_DIAG_DYN) { 5348 /* 5349 * Allocate a buffer for the results (otherwise the HAL 5350 * returns a pointer to a buffer where we can read the 5351 * results). Note that we depend on the HAL leaving this 5352 * pointer for us to use below in reclaiming the buffer; 5353 * may want to be more defensive. 5354 */ 5355 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 5356 if (outdata == NULL) { 5357 error = ENOMEM; 5358 goto bad; 5359 } 5360 } 5361 if (ath_hal_getdiagstate(ah, id, indata, insize, &outdata, &outsize)) { 5362 if (outsize < ad->ad_out_size) 5363 ad->ad_out_size = outsize; 5364 if (outdata != NULL) 5365 error = copyout(outdata, ad->ad_out_data, 5366 ad->ad_out_size); 5367 } else { 5368 error = EINVAL; 5369 } 5370 bad: 5371 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 5372 free(indata, M_TEMP); 5373 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 5374 free(outdata, M_TEMP); 5375 return error; 5376 } 5377 5378 static int 5379 ath_ioctl(struct ifnet *ifp, u_long cmd, void *data) 5380 { 5381 #define IS_RUNNING(ifp) \ 5382 ((ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING)) 5383 struct ath_softc *sc = ifp->if_softc; 5384 struct ieee80211com *ic = &sc->sc_ic; 5385 struct ifreq *ifr = (struct ifreq *)data; 5386 int error = 0, s; 5387 5388 s = splnet(); 5389 switch (cmd) { 5390 case SIOCSIFFLAGS: 5391 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 5392 break; 5393 switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) { 5394 case IFF_UP | IFF_RUNNING: 5395 /* 5396 * To avoid rescanning another access point, 5397 * do not call ath_init() here. Instead, 5398 * only reflect promisc mode settings. 5399 */ 5400 ath_mode_init(sc); 5401 break; 5402 case IFF_UP: 5403 /* 5404 * Beware of being called during attach/detach 5405 * to reset promiscuous mode. In that case we 5406 * will still be marked UP but not RUNNING. 5407 * However trying to re-init the interface 5408 * is the wrong thing to do as we've already 5409 * torn down much of our state. There's 5410 * probably a better way to deal with this. 5411 */ 5412 error = ath_init(sc); 5413 break; 5414 case IFF_RUNNING: 5415 ath_stop_locked(ifp, 1); 5416 break; 5417 case 0: 5418 break; 5419 } 5420 break; 5421 case SIOCADDMULTI: 5422 case SIOCDELMULTI: 5423 if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { 5424 if (ifp->if_flags & IFF_RUNNING) 5425 ath_mode_init(sc); 5426 error = 0; 5427 } 5428 break; 5429 case SIOCGATHSTATS: 5430 /* NB: embed these numbers to get a consistent view */ 5431 sc->sc_stats.ast_tx_packets = ifp->if_opackets; 5432 sc->sc_stats.ast_rx_packets = ifp->if_ipackets; 5433 sc->sc_stats.ast_rx_rssi = ieee80211_getrssi(ic); 5434 splx(s); 5435 /* 5436 * NB: Drop the softc lock in case of a page fault; 5437 * we'll accept any potential inconsisentcy in the 5438 * statistics. The alternative is to copy the data 5439 * to a local structure. 5440 */ 5441 return copyout(&sc->sc_stats, 5442 ifr->ifr_data, sizeof (sc->sc_stats)); 5443 case SIOCGATHDIAG: 5444 error = ath_ioctl_diag(sc, (struct ath_diag *) ifr); 5445 break; 5446 default: 5447 error = ieee80211_ioctl(ic, cmd, data); 5448 if (error != ENETRESET) 5449 ; 5450 else if (IS_RUNNING(ifp) && 5451 ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 5452 error = ath_init(sc); 5453 else 5454 error = 0; 5455 break; 5456 } 5457 splx(s); 5458 return error; 5459 #undef IS_RUNNING 5460 } 5461 5462 static void 5463 ath_bpfattach(struct ath_softc *sc) 5464 { 5465 struct ifnet *ifp = &sc->sc_if; 5466 5467 bpf_attach2(ifp, DLT_IEEE802_11_RADIO, 5468 sizeof(struct ieee80211_frame) + sizeof(sc->sc_tx_th), 5469 &sc->sc_drvbpf); 5470 5471 /* 5472 * Initialize constant fields. 5473 * XXX make header lengths a multiple of 32-bits so subsequent 5474 * headers are properly aligned; this is a kludge to keep 5475 * certain applications happy. 5476 * 5477 * NB: the channel is setup each time we transition to the 5478 * RUN state to avoid filling it in for each frame. 5479 */ 5480 sc->sc_tx_th_len = roundup(sizeof(sc->sc_tx_th), sizeof(u_int32_t)); 5481 sc->sc_tx_th.wt_ihdr.it_len = htole16(sc->sc_tx_th_len); 5482 sc->sc_tx_th.wt_ihdr.it_present = htole32(ATH_TX_RADIOTAP_PRESENT); 5483 5484 sc->sc_rx_th_len = roundup(sizeof(sc->sc_rx_th), sizeof(u_int32_t)); 5485 sc->sc_rx_th.wr_ihdr.it_len = htole16(sc->sc_rx_th_len); 5486 sc->sc_rx_th.wr_ihdr.it_present = htole32(ATH_RX_RADIOTAP_PRESENT); 5487 } 5488 5489 /* 5490 * Announce various information on device/driver attach. 5491 */ 5492 static void 5493 ath_announce(struct ath_softc *sc) 5494 { 5495 #define HAL_MODE_DUALBAND (HAL_MODE_11A|HAL_MODE_11B) 5496 struct ifnet *ifp = &sc->sc_if; 5497 struct ath_hal *ah = sc->sc_ah; 5498 u_int modes, cc; 5499 5500 if_printf(ifp, "mac %d.%d phy %d.%d", 5501 ah->ah_macVersion, ah->ah_macRev, 5502 ah->ah_phyRev >> 4, ah->ah_phyRev & 0xf); 5503 /* 5504 * Print radio revision(s). We check the wireless modes 5505 * to avoid falsely printing revs for inoperable parts. 5506 * Dual-band radio revs are returned in the 5 GHz rev number. 5507 */ 5508 ath_hal_getcountrycode(ah, &cc); 5509 modes = ath_hal_getwirelessmodes(ah, cc); 5510 if ((modes & HAL_MODE_DUALBAND) == HAL_MODE_DUALBAND) { 5511 if (ah->ah_analog5GhzRev && ah->ah_analog2GhzRev) 5512 printf(" 5 GHz radio %d.%d 2 GHz radio %d.%d", 5513 ah->ah_analog5GhzRev >> 4, 5514 ah->ah_analog5GhzRev & 0xf, 5515 ah->ah_analog2GhzRev >> 4, 5516 ah->ah_analog2GhzRev & 0xf); 5517 else 5518 printf(" radio %d.%d", ah->ah_analog5GhzRev >> 4, 5519 ah->ah_analog5GhzRev & 0xf); 5520 } else 5521 printf(" radio %d.%d", ah->ah_analog5GhzRev >> 4, 5522 ah->ah_analog5GhzRev & 0xf); 5523 printf("\n"); 5524 if (bootverbose) { 5525 int i; 5526 for (i = 0; i <= WME_AC_VO; i++) { 5527 struct ath_txq *txq = sc->sc_ac2q[i]; 5528 if_printf(ifp, "Use hw queue %u for %s traffic\n", 5529 txq->axq_qnum, ieee80211_wme_acnames[i]); 5530 } 5531 if_printf(ifp, "Use hw queue %u for CAB traffic\n", 5532 sc->sc_cabq->axq_qnum); 5533 if_printf(ifp, "Use hw queue %u for beacons\n", sc->sc_bhalq); 5534 } 5535 if (ath_rxbuf != ATH_RXBUF) 5536 if_printf(ifp, "using %u rx buffers\n", ath_rxbuf); 5537 if (ath_txbuf != ATH_TXBUF) 5538 if_printf(ifp, "using %u tx buffers\n", ath_txbuf); 5539 #undef HAL_MODE_DUALBAND 5540 } 5541
Indexes created Thu Oct 02 07:10:07 GMT 2025