if_ath_tx.c revision 240677
1218065Sadrian/*- 2218065Sadrian * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 3240592Sadrian * Copyright (c) 2010-2012 Adrian Chadd, Xenion Pty Ltd 4218065Sadrian * All rights reserved. 5218065Sadrian * 6218065Sadrian * Redistribution and use in source and binary forms, with or without 7218065Sadrian * modification, are permitted provided that the following conditions 8218065Sadrian * are met: 9218065Sadrian * 1. Redistributions of source code must retain the above copyright 10218065Sadrian * notice, this list of conditions and the following disclaimer, 11218065Sadrian * without modification. 12218065Sadrian * 2. Redistributions in binary form must reproduce at minimum a disclaimer 13218065Sadrian * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 14218065Sadrian * redistribution must be conditioned upon including a substantially 15218065Sadrian * similar Disclaimer requirement for further binary redistribution. 16218065Sadrian * 17218065Sadrian * NO WARRANTY 18218065Sadrian * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19218065Sadrian * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20218065Sadrian * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 21218065Sadrian * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 22218065Sadrian * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 23218065Sadrian * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24218065Sadrian * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25218065Sadrian * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 26218065Sadrian * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27218065Sadrian * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28218065Sadrian * THE POSSIBILITY OF SUCH DAMAGES. 29218065Sadrian */ 30218065Sadrian 31218065Sadrian#include <sys/cdefs.h> 32218065Sadrian__FBSDID("$FreeBSD: head/sys/dev/ath/if_ath_tx.c 240677 2012-09-18 20:33:04Z adrian $"); 33218065Sadrian 34218065Sadrian/* 35218065Sadrian * Driver for the Atheros Wireless LAN controller. 36218065Sadrian * 37218065Sadrian * This software is derived from work of Atsushi Onoe; his contribution 38218065Sadrian * is greatly appreciated. 39218065Sadrian */ 40218065Sadrian 41218065Sadrian#include "opt_inet.h" 42218065Sadrian#include "opt_ath.h" 43218065Sadrian#include "opt_wlan.h" 44218065Sadrian 45218065Sadrian#include <sys/param.h> 46218065Sadrian#include <sys/systm.h> 47218065Sadrian#include <sys/sysctl.h> 48218065Sadrian#include <sys/mbuf.h> 49218065Sadrian#include <sys/malloc.h> 50218065Sadrian#include <sys/lock.h> 51218065Sadrian#include <sys/mutex.h> 52218065Sadrian#include <sys/kernel.h> 53218065Sadrian#include <sys/socket.h> 54218065Sadrian#include <sys/sockio.h> 55218065Sadrian#include <sys/errno.h> 56218065Sadrian#include <sys/callout.h> 57218065Sadrian#include <sys/bus.h> 58218065Sadrian#include <sys/endian.h> 59218065Sadrian#include <sys/kthread.h> 60218065Sadrian#include <sys/taskqueue.h> 61218065Sadrian#include <sys/priv.h> 62218065Sadrian 63218065Sadrian#include <machine/bus.h> 64218065Sadrian 65218065Sadrian#include <net/if.h> 66218065Sadrian#include <net/if_dl.h> 67218065Sadrian#include <net/if_media.h> 68218065Sadrian#include <net/if_types.h> 69218065Sadrian#include <net/if_arp.h> 70218065Sadrian#include <net/ethernet.h> 71218065Sadrian#include <net/if_llc.h> 72218065Sadrian 73218065Sadrian#include <net80211/ieee80211_var.h> 74218065Sadrian#include <net80211/ieee80211_regdomain.h> 75218065Sadrian#ifdef IEEE80211_SUPPORT_SUPERG 76218065Sadrian#include <net80211/ieee80211_superg.h> 77218065Sadrian#endif 78218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 79218065Sadrian#include <net80211/ieee80211_tdma.h> 80218065Sadrian#endif 81227364Sadrian#include <net80211/ieee80211_ht.h> 82218065Sadrian 83218065Sadrian#include <net/bpf.h> 84218065Sadrian 85218065Sadrian#ifdef INET 86218065Sadrian#include <netinet/in.h> 87218065Sadrian#include <netinet/if_ether.h> 88218065Sadrian#endif 89218065Sadrian 90218065Sadrian#include <dev/ath/if_athvar.h> 91218065Sadrian#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */ 92218065Sadrian#include <dev/ath/ath_hal/ah_diagcodes.h> 93218065Sadrian 94218065Sadrian#include <dev/ath/if_ath_debug.h> 95218065Sadrian 96218065Sadrian#ifdef ATH_TX99_DIAG 97218065Sadrian#include <dev/ath/ath_tx99/ath_tx99.h> 98218065Sadrian#endif 99218065Sadrian 100218065Sadrian#include <dev/ath/if_ath_misc.h> 101218065Sadrian#include <dev/ath/if_ath_tx.h> 102218240Sadrian#include <dev/ath/if_ath_tx_ht.h> 103218065Sadrian 104218154Sadrian/* 105227364Sadrian * How many retries to perform in software 106227364Sadrian */ 107227364Sadrian#define SWMAX_RETRIES 10 108227364Sadrian 109227364Sadrianstatic int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, 110227364Sadrian int tid); 111227364Sadrianstatic int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, 112227364Sadrian int tid); 113236872Sadrianstatic ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc, 114236872Sadrian struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0); 115227364Sadrianstatic int ath_tx_action_frame_override_queue(struct ath_softc *sc, 116227364Sadrian struct ieee80211_node *ni, struct mbuf *m0, int *tid); 117240639Sadrianstatic struct ath_buf * 118240639Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 119240639Sadrian struct ath_tid *tid, struct ath_buf *bf); 120227364Sadrian 121227364Sadrian/* 122218154Sadrian * Whether to use the 11n rate scenario functions or not 123218154Sadrian */ 124218154Sadrianstatic inline int 125218154Sadrianath_tx_is_11n(struct ath_softc *sc) 126218154Sadrian{ 127239198Sadrian return ((sc->sc_ah->ah_magic == 0x20065416) || 128239198Sadrian (sc->sc_ah->ah_magic == 0x19741014)); 129218154Sadrian} 130218154Sadrian 131227364Sadrian/* 132227364Sadrian * Obtain the current TID from the given frame. 133227364Sadrian * 134227364Sadrian * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.) 135227364Sadrian * This has implications for which AC/priority the packet is placed 136227364Sadrian * in. 137227364Sadrian */ 138227364Sadrianstatic int 139227364Sadrianath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0) 140227364Sadrian{ 141227364Sadrian const struct ieee80211_frame *wh; 142227364Sadrian int pri = M_WME_GETAC(m0); 143227364Sadrian 144227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 145227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 146227364Sadrian return IEEE80211_NONQOS_TID; 147227364Sadrian else 148227364Sadrian return WME_AC_TO_TID(pri); 149227364Sadrian} 150227364Sadrian 151240639Sadrianstatic void 152240639Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 153240639Sadrian{ 154240639Sadrian struct ieee80211_frame *wh; 155240639Sadrian 156240639Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 157240639Sadrian /* Only update/resync if needed */ 158240639Sadrian if (bf->bf_state.bfs_isretried == 0) { 159240639Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 160240639Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 161240639Sadrian BUS_DMASYNC_PREWRITE); 162240639Sadrian } 163240639Sadrian bf->bf_state.bfs_isretried = 1; 164240639Sadrian bf->bf_state.bfs_retries ++; 165240639Sadrian} 166240639Sadrian 167227364Sadrian/* 168227364Sadrian * Determine what the correct AC queue for the given frame 169227364Sadrian * should be. 170227364Sadrian * 171227364Sadrian * This code assumes that the TIDs map consistently to 172227364Sadrian * the underlying hardware (or software) ath_txq. 173227364Sadrian * Since the sender may try to set an AC which is 174227364Sadrian * arbitrary, non-QoS TIDs may end up being put on 175227364Sadrian * completely different ACs. There's no way to put a 176227364Sadrian * TID into multiple ath_txq's for scheduling, so 177227364Sadrian * for now we override the AC/TXQ selection and set 178227364Sadrian * non-QOS TID frames into the BE queue. 179227364Sadrian * 180227364Sadrian * This may be completely incorrect - specifically, 181227364Sadrian * some management frames may end up out of order 182227364Sadrian * compared to the QoS traffic they're controlling. 183227364Sadrian * I'll look into this later. 184227364Sadrian */ 185227364Sadrianstatic int 186227364Sadrianath_tx_getac(struct ath_softc *sc, const struct mbuf *m0) 187227364Sadrian{ 188227364Sadrian const struct ieee80211_frame *wh; 189227364Sadrian int pri = M_WME_GETAC(m0); 190227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 191227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh)) 192227364Sadrian return pri; 193227364Sadrian 194227364Sadrian return WME_AC_BE; 195227364Sadrian} 196227364Sadrian 197218065Sadrianvoid 198218065Sadrianath_txfrag_cleanup(struct ath_softc *sc, 199218065Sadrian ath_bufhead *frags, struct ieee80211_node *ni) 200218065Sadrian{ 201218065Sadrian struct ath_buf *bf, *next; 202218065Sadrian 203218065Sadrian ATH_TXBUF_LOCK_ASSERT(sc); 204218065Sadrian 205227344Sadrian TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) { 206218065Sadrian /* NB: bf assumed clean */ 207227344Sadrian TAILQ_REMOVE(frags, bf, bf_list); 208236993Sadrian ath_returnbuf_head(sc, bf); 209218065Sadrian ieee80211_node_decref(ni); 210218065Sadrian } 211218065Sadrian} 212218065Sadrian 213218065Sadrian/* 214218065Sadrian * Setup xmit of a fragmented frame. Allocate a buffer 215218065Sadrian * for each frag and bump the node reference count to 216218065Sadrian * reflect the held reference to be setup by ath_tx_start. 217218065Sadrian */ 218218065Sadrianint 219218065Sadrianath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags, 220218065Sadrian struct mbuf *m0, struct ieee80211_node *ni) 221218065Sadrian{ 222218065Sadrian struct mbuf *m; 223218065Sadrian struct ath_buf *bf; 224218065Sadrian 225218065Sadrian ATH_TXBUF_LOCK(sc); 226218065Sadrian for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) { 227237000Sadrian /* XXX non-management? */ 228237000Sadrian bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL); 229218065Sadrian if (bf == NULL) { /* out of buffers, cleanup */ 230234009Sadrian device_printf(sc->sc_dev, "%s: no buffer?\n", 231234009Sadrian __func__); 232218065Sadrian ath_txfrag_cleanup(sc, frags, ni); 233218065Sadrian break; 234218065Sadrian } 235218065Sadrian ieee80211_node_incref(ni); 236227344Sadrian TAILQ_INSERT_TAIL(frags, bf, bf_list); 237218065Sadrian } 238218065Sadrian ATH_TXBUF_UNLOCK(sc); 239218065Sadrian 240227344Sadrian return !TAILQ_EMPTY(frags); 241218065Sadrian} 242218065Sadrian 243218065Sadrian/* 244218065Sadrian * Reclaim mbuf resources. For fragmented frames we 245218065Sadrian * need to claim each frag chained with m_nextpkt. 246218065Sadrian */ 247218065Sadrianvoid 248218065Sadrianath_freetx(struct mbuf *m) 249218065Sadrian{ 250218065Sadrian struct mbuf *next; 251218065Sadrian 252218065Sadrian do { 253218065Sadrian next = m->m_nextpkt; 254218065Sadrian m->m_nextpkt = NULL; 255218065Sadrian m_freem(m); 256218065Sadrian } while ((m = next) != NULL); 257218065Sadrian} 258218065Sadrian 259218065Sadrianstatic int 260218065Sadrianath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0) 261218065Sadrian{ 262218065Sadrian struct mbuf *m; 263218065Sadrian int error; 264218065Sadrian 265218065Sadrian /* 266218065Sadrian * Load the DMA map so any coalescing is done. This 267218065Sadrian * also calculates the number of descriptors we need. 268218065Sadrian */ 269218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 270218065Sadrian bf->bf_segs, &bf->bf_nseg, 271218065Sadrian BUS_DMA_NOWAIT); 272218065Sadrian if (error == EFBIG) { 273218065Sadrian /* XXX packet requires too many descriptors */ 274218065Sadrian bf->bf_nseg = ATH_TXDESC+1; 275218065Sadrian } else if (error != 0) { 276218065Sadrian sc->sc_stats.ast_tx_busdma++; 277218065Sadrian ath_freetx(m0); 278218065Sadrian return error; 279218065Sadrian } 280218065Sadrian /* 281218065Sadrian * Discard null packets and check for packets that 282218065Sadrian * require too many TX descriptors. We try to convert 283218065Sadrian * the latter to a cluster. 284218065Sadrian */ 285218065Sadrian if (bf->bf_nseg > ATH_TXDESC) { /* too many desc's, linearize */ 286218065Sadrian sc->sc_stats.ast_tx_linear++; 287218065Sadrian m = m_collapse(m0, M_DONTWAIT, ATH_TXDESC); 288218065Sadrian if (m == NULL) { 289218065Sadrian ath_freetx(m0); 290218065Sadrian sc->sc_stats.ast_tx_nombuf++; 291218065Sadrian return ENOMEM; 292218065Sadrian } 293218065Sadrian m0 = m; 294218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 295218065Sadrian bf->bf_segs, &bf->bf_nseg, 296218065Sadrian BUS_DMA_NOWAIT); 297218065Sadrian if (error != 0) { 298218065Sadrian sc->sc_stats.ast_tx_busdma++; 299218065Sadrian ath_freetx(m0); 300218065Sadrian return error; 301218065Sadrian } 302218065Sadrian KASSERT(bf->bf_nseg <= ATH_TXDESC, 303218065Sadrian ("too many segments after defrag; nseg %u", bf->bf_nseg)); 304218065Sadrian } else if (bf->bf_nseg == 0) { /* null packet, discard */ 305218065Sadrian sc->sc_stats.ast_tx_nodata++; 306218065Sadrian ath_freetx(m0); 307218065Sadrian return EIO; 308218065Sadrian } 309218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", 310218065Sadrian __func__, m0, m0->m_pkthdr.len); 311218065Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 312218065Sadrian bf->bf_m = m0; 313218065Sadrian 314218065Sadrian return 0; 315218065Sadrian} 316218065Sadrian 317227360Sadrian/* 318227360Sadrian * Chain together segments+descriptors for a non-11n frame. 319227360Sadrian */ 320218065Sadrianstatic void 321227364Sadrianath_tx_chaindesclist(struct ath_softc *sc, struct ath_buf *bf) 322218065Sadrian{ 323218065Sadrian struct ath_hal *ah = sc->sc_ah; 324239409Sadrian char *ds, *ds0; 325239290Sadrian int i, bp, dsp; 326239051Sadrian HAL_DMA_ADDR bufAddrList[4]; 327239051Sadrian uint32_t segLenList[4]; 328239290Sadrian int numTxMaps = 1; 329239380Sadrian int isFirstDesc = 1; 330239465Sadrian int qnum; 331239051Sadrian 332238708Sadrian /* 333238708Sadrian * XXX There's txdma and txdma_mgmt; the descriptor 334238708Sadrian * sizes must match. 335238708Sadrian */ 336238708Sadrian struct ath_descdma *dd = &sc->sc_txdma; 337218065Sadrian 338218065Sadrian /* 339218065Sadrian * Fillin the remainder of the descriptor info. 340218065Sadrian */ 341239290Sadrian 342239290Sadrian /* 343239290Sadrian * For now the HAL doesn't implement halNumTxMaps for non-EDMA 344239290Sadrian * (ie it's 0.) So just work around it. 345239290Sadrian * 346239290Sadrian * XXX TODO: populate halNumTxMaps for each HAL chip and 347239290Sadrian * then undo this hack. 348239290Sadrian */ 349239290Sadrian if (sc->sc_ah->ah_magic == 0x19741014) 350239290Sadrian numTxMaps = 4; 351239290Sadrian 352239290Sadrian /* 353239290Sadrian * For EDMA and later chips ensure the TX map is fully populated 354239290Sadrian * before advancing to the next descriptor. 355239290Sadrian */ 356239409Sadrian ds0 = ds = (char *) bf->bf_desc; 357239290Sadrian bp = dsp = 0; 358239290Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 359239290Sadrian bzero(segLenList, sizeof(segLenList)); 360239290Sadrian for (i = 0; i < bf->bf_nseg; i++) { 361239290Sadrian bufAddrList[bp] = bf->bf_segs[i].ds_addr; 362239290Sadrian segLenList[bp] = bf->bf_segs[i].ds_len; 363239290Sadrian bp++; 364239051Sadrian 365239290Sadrian /* 366239290Sadrian * Go to the next segment if this isn't the last segment 367239290Sadrian * and there's space in the current TX map. 368239290Sadrian */ 369239290Sadrian if ((i != bf->bf_nseg - 1) && (bp < numTxMaps)) 370239290Sadrian continue; 371239051Sadrian 372239290Sadrian /* 373239290Sadrian * Last segment or we're out of buffer pointers. 374239290Sadrian */ 375239290Sadrian bp = 0; 376239290Sadrian 377218065Sadrian if (i == bf->bf_nseg - 1) 378239409Sadrian ath_hal_settxdesclink(ah, (struct ath_desc *) ds, 0); 379218065Sadrian else 380239409Sadrian ath_hal_settxdesclink(ah, (struct ath_desc *) ds, 381239290Sadrian bf->bf_daddr + dd->dd_descsize * (dsp + 1)); 382239051Sadrian 383239051Sadrian /* 384239051Sadrian * XXX this assumes that bfs_txq is the actual destination 385239051Sadrian * hardware queue at this point. It may not have been assigned, 386239051Sadrian * it may actually be pointing to the multicast software 387239051Sadrian * TXQ id. These must be fixed! 388239051Sadrian */ 389239465Sadrian qnum = bf->bf_state.bfs_txq->axq_qnum; 390239465Sadrian 391239409Sadrian ath_hal_filltxdesc(ah, (struct ath_desc *) ds 392239051Sadrian , bufAddrList 393239051Sadrian , segLenList 394239290Sadrian , bf->bf_descid /* XXX desc id */ 395239465Sadrian , qnum 396239380Sadrian , isFirstDesc /* first segment */ 397218065Sadrian , i == bf->bf_nseg - 1 /* last segment */ 398239409Sadrian , (struct ath_desc *) ds0 /* first descriptor */ 399218065Sadrian ); 400240255Sadrian 401240255Sadrian /* Make sure the 11n aggregate fields are cleared */ 402240255Sadrian if (ath_tx_is_11n(sc)) 403240333Sadrian ath_hal_clr11n_aggr(sc->sc_ah, (struct ath_desc *) ds); 404240255Sadrian 405239380Sadrian isFirstDesc = 0; 406239438Sadrian#ifdef ATH_DEBUG 407239409Sadrian if (sc->sc_debug & ATH_DEBUG_XMIT) 408239409Sadrian ath_printtxbuf(sc, bf, qnum, 0, 0); 409239438Sadrian#endif 410239409Sadrian bf->bf_lastds = (struct ath_desc *) ds; 411239290Sadrian 412239290Sadrian /* 413239290Sadrian * Don't forget to skip to the next descriptor. 414239290Sadrian */ 415239409Sadrian ds += sc->sc_tx_desclen; 416239290Sadrian dsp++; 417239290Sadrian 418239290Sadrian /* 419239290Sadrian * .. and don't forget to blank these out! 420239290Sadrian */ 421239290Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 422239290Sadrian bzero(segLenList, sizeof(segLenList)); 423218065Sadrian } 424233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 425218154Sadrian} 426218154Sadrian 427227364Sadrian/* 428227364Sadrian * Fill in the descriptor list for a aggregate subframe. 429227364Sadrian * 430227364Sadrian * The subframe is returned with the ds_link field in the last subframe 431227364Sadrian * pointing to 0. 432227364Sadrian */ 433218154Sadrianstatic void 434227364Sadrianath_tx_chaindesclist_subframe(struct ath_softc *sc, struct ath_buf *bf) 435218154Sadrian{ 436218154Sadrian struct ath_hal *ah = sc->sc_ah; 437227364Sadrian struct ath_desc *ds, *ds0; 438227364Sadrian int i; 439239053Sadrian HAL_DMA_ADDR bufAddrList[4]; 440239053Sadrian uint32_t segLenList[4]; 441239053Sadrian 442238708Sadrian /* 443238708Sadrian * XXX There's txdma and txdma_mgmt; the descriptor 444238708Sadrian * sizes must match. 445238708Sadrian */ 446238708Sadrian struct ath_descdma *dd = &sc->sc_txdma; 447218154Sadrian 448227364Sadrian ds0 = ds = bf->bf_desc; 449218154Sadrian 450218065Sadrian /* 451227364Sadrian * There's no need to call ath_hal_setupfirsttxdesc here; 452227364Sadrian * That's only going to occur for the first frame in an aggregate. 453227364Sadrian */ 454227364Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 455239053Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 456239053Sadrian bzero(segLenList, sizeof(segLenList)); 457227364Sadrian if (i == bf->bf_nseg - 1) 458238609Sadrian ath_hal_settxdesclink(ah, ds, 0); 459227364Sadrian else 460238609Sadrian ath_hal_settxdesclink(ah, ds, 461238708Sadrian bf->bf_daddr + dd->dd_descsize * (i + 1)); 462227364Sadrian 463239053Sadrian bufAddrList[0] = bf->bf_segs[i].ds_addr; 464239053Sadrian segLenList[0] = bf->bf_segs[i].ds_len; 465239053Sadrian 466227364Sadrian /* 467227364Sadrian * This performs the setup for an aggregate frame. 468227364Sadrian * This includes enabling the aggregate flags if needed. 469227364Sadrian */ 470227364Sadrian ath_hal_chaintxdesc(ah, ds, 471239053Sadrian bufAddrList, 472239053Sadrian segLenList, 473227364Sadrian bf->bf_state.bfs_pktlen, 474227364Sadrian bf->bf_state.bfs_hdrlen, 475227364Sadrian HAL_PKT_TYPE_AMPDU, /* forces aggregate bits to be set */ 476227364Sadrian bf->bf_state.bfs_keyix, 477227364Sadrian 0, /* cipher, calculated from keyix */ 478227364Sadrian bf->bf_state.bfs_ndelim, 479227364Sadrian i == 0, /* first segment */ 480233895Sadrian i == bf->bf_nseg - 1, /* last segment */ 481233895Sadrian bf->bf_next == NULL /* last sub-frame in aggr */ 482227364Sadrian ); 483227364Sadrian 484227364Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 485227364Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 486227364Sadrian __func__, i, ds->ds_link, ds->ds_data, 487227364Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 488227364Sadrian bf->bf_lastds = ds; 489233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 490233990Sadrian BUS_DMASYNC_PREWRITE); 491227364Sadrian } 492227364Sadrian} 493227364Sadrian 494227364Sadrian/* 495238947Sadrian * Set the rate control fields in the given descriptor based on 496238947Sadrian * the bf_state fields and node state. 497238947Sadrian * 498238947Sadrian * The bfs fields should already be set with the relevant rate 499238947Sadrian * control information, including whether MRR is to be enabled. 500238947Sadrian * 501238947Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 502238947Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 503238947Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 504238947Sadrian * unconditionally for 11n chips. These require the 11n rate 505238947Sadrian * scenario to be set if MCS rates are enabled, so it's easier 506238947Sadrian * to just always call it. The caller can then only set rates 2, 3 507238947Sadrian * and 4 if multi-rate retry is needed. 508238947Sadrian */ 509238947Sadrianstatic void 510238947Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 511238947Sadrian struct ath_buf *bf) 512238947Sadrian{ 513238947Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 514238947Sadrian 515238947Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 516238947Sadrian if (! bf->bf_state.bfs_ismrr) 517238947Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 518238947Sadrian 519238947Sadrian /* 520238947Sadrian * Always call - that way a retried descriptor will 521238947Sadrian * have the MRR fields overwritten. 522238947Sadrian * 523238947Sadrian * XXX TODO: see if this is really needed - setting up 524238947Sadrian * the first descriptor should set the MRR fields to 0 525238947Sadrian * for us anyway. 526238947Sadrian */ 527238947Sadrian if (ath_tx_is_11n(sc)) { 528238947Sadrian ath_buf_set_rate(sc, ni, bf); 529238947Sadrian } else { 530238947Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 531238947Sadrian , rc[1].ratecode, rc[1].tries 532238947Sadrian , rc[2].ratecode, rc[2].tries 533238947Sadrian , rc[3].ratecode, rc[3].tries 534238947Sadrian ); 535238947Sadrian } 536238947Sadrian} 537238947Sadrian 538238947Sadrian/* 539227364Sadrian * Setup segments+descriptors for an 11n aggregate. 540227364Sadrian * bf_first is the first buffer in the aggregate. 541227364Sadrian * The descriptor list must already been linked together using 542227364Sadrian * bf->bf_next. 543227364Sadrian */ 544227364Sadrianstatic void 545227364Sadrianath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first) 546227364Sadrian{ 547227364Sadrian struct ath_buf *bf, *bf_prev = NULL; 548227364Sadrian 549227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n", 550227364Sadrian __func__, bf_first->bf_state.bfs_nframes, 551227364Sadrian bf_first->bf_state.bfs_al); 552227364Sadrian 553227364Sadrian /* 554227364Sadrian * Setup all descriptors of all subframes. 555227364Sadrian */ 556227364Sadrian bf = bf_first; 557227364Sadrian while (bf != NULL) { 558227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 559227364Sadrian "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n", 560227364Sadrian __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen, 561227364Sadrian SEQNO(bf->bf_state.bfs_seqno)); 562227364Sadrian 563227364Sadrian /* Sub-frame setup */ 564227364Sadrian ath_tx_chaindesclist_subframe(sc, bf); 565227364Sadrian 566227364Sadrian /* 567227364Sadrian * Link the last descriptor of the previous frame 568227364Sadrian * to the beginning descriptor of this frame. 569227364Sadrian */ 570227364Sadrian if (bf_prev != NULL) 571238609Sadrian ath_hal_settxdesclink(sc->sc_ah, bf_prev->bf_lastds, 572238609Sadrian bf->bf_daddr); 573227364Sadrian 574227364Sadrian /* Save a copy so we can link the next descriptor in */ 575227364Sadrian bf_prev = bf; 576227364Sadrian bf = bf->bf_next; 577227364Sadrian } 578227364Sadrian 579227364Sadrian /* 580227364Sadrian * Setup first descriptor of first frame. 581227364Sadrian * chaintxdesc() overwrites the descriptor entries; 582227364Sadrian * setupfirsttxdesc() merges in things. 583227364Sadrian * Otherwise various fields aren't set correctly (eg flags). 584227364Sadrian */ 585227364Sadrian ath_hal_setupfirsttxdesc(sc->sc_ah, 586227364Sadrian bf_first->bf_desc, 587227364Sadrian bf_first->bf_state.bfs_al, 588233966Sadrian bf_first->bf_state.bfs_txflags | HAL_TXDESC_INTREQ, 589227364Sadrian bf_first->bf_state.bfs_txpower, 590227364Sadrian bf_first->bf_state.bfs_txrate0, 591227364Sadrian bf_first->bf_state.bfs_try0, 592227364Sadrian bf_first->bf_state.bfs_txantenna, 593227364Sadrian bf_first->bf_state.bfs_ctsrate, 594227364Sadrian bf_first->bf_state.bfs_ctsduration); 595227364Sadrian 596227364Sadrian /* 597227364Sadrian * Set the first descriptor bf_lastds field to point to 598227364Sadrian * the last descriptor in the last subframe, that's where 599227364Sadrian * the status update will occur. 600227364Sadrian */ 601227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 602227364Sadrian 603227364Sadrian /* 604227364Sadrian * And bf_last in the first descriptor points to the end of 605227364Sadrian * the aggregate list. 606227364Sadrian */ 607227364Sadrian bf_first->bf_last = bf_prev; 608227364Sadrian 609238947Sadrian /* 610238947Sadrian * setup first desc with rate and aggr info 611238947Sadrian */ 612238947Sadrian ath_tx_set_ratectrl(sc, bf_first->bf_node, bf_first); 613238947Sadrian 614238949Sadrian /* 615238949Sadrian * Setup the last descriptor in the list. 616238993Sadrian * 617238993Sadrian * bf_first->bf_lastds already points to it; the rate 618238993Sadrian * control information needs to be squirreled away here 619238993Sadrian * as well ans clearing the moreaggr/paddelim fields. 620238949Sadrian */ 621238993Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_first->bf_lastds, 622238949Sadrian bf_first->bf_desc); 623238949Sadrian 624227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 625227364Sadrian} 626227364Sadrian 627239051Sadrian/* 628239051Sadrian * Hand-off a frame to the multicast TX queue. 629239051Sadrian * 630239051Sadrian * This is a software TXQ which will be appended to the CAB queue 631239051Sadrian * during the beacon setup code. 632239051Sadrian * 633239051Sadrian * XXX TODO: since the AR9300 EDMA TX queue support wants the QCU ID 634239051Sadrian * as part of the TX descriptor, bf_state.bfs_txq must be updated 635239051Sadrian * with the actual hardware txq, or all of this will fall apart. 636239051Sadrian * 637239051Sadrian * XXX It may not be a bad idea to just stuff the QCU ID into bf_state 638239051Sadrian * and retire bfs_txq; then make sure the CABQ QCU ID is populated 639239051Sadrian * correctly. 640239051Sadrian */ 641227364Sadrianstatic void 642227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 643227364Sadrian struct ath_buf *bf) 644227364Sadrian{ 645227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 646227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 647227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 648227364Sadrian if (txq->axq_link != NULL) { 649227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 650227364Sadrian struct ieee80211_frame *wh; 651227364Sadrian 652227364Sadrian /* mark previous frame */ 653227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 654227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 655227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 656227364Sadrian BUS_DMASYNC_PREWRITE); 657227364Sadrian 658227364Sadrian /* link descriptor */ 659227364Sadrian *txq->axq_link = bf->bf_daddr; 660227364Sadrian } 661227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 662238609Sadrian ath_hal_gettxdesclinkptr(sc->sc_ah, bf->bf_lastds, &txq->axq_link); 663227364Sadrian} 664227364Sadrian 665227364Sadrian/* 666227364Sadrian * Hand-off packet to a hardware queue. 667227364Sadrian */ 668227364Sadrianstatic void 669229949Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, 670229949Sadrian struct ath_buf *bf) 671227364Sadrian{ 672227364Sadrian struct ath_hal *ah = sc->sc_ah; 673227364Sadrian 674227364Sadrian /* 675218065Sadrian * Insert the frame on the outbound list and pass it on 676218065Sadrian * to the hardware. Multicast frames buffered for power 677218065Sadrian * save stations and transmit from the CAB queue are stored 678218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 679218065Sadrian * the SWBA handler since frames only go out on DTIM and 680218065Sadrian * to avoid possible races. 681218065Sadrian */ 682227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 683218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 684227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 685227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 686227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 687227364Sadrian 688227651Sadrian#if 0 689227651Sadrian /* 690227651Sadrian * This causes a LOR. Find out where the PCU lock is being 691227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 692227651Sadrian * be occuring. 693227651Sadrian */ 694227651Sadrian ATH_PCU_LOCK(sc); 695227651Sadrian if (sc->sc_inreset_cnt) { 696227651Sadrian ATH_PCU_UNLOCK(sc); 697227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 698227651Sadrian "%s: called with sc_in_reset != 0\n", 699227651Sadrian __func__); 700227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 701227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 702227651Sadrian __func__, txq->axq_qnum, 703227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 704227651Sadrian txq->axq_depth); 705227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 706227651Sadrian if (bf->bf_state.bfs_aggr) 707227651Sadrian txq->axq_aggr_depth++; 708227651Sadrian /* 709227651Sadrian * There's no need to update axq_link; the hardware 710227651Sadrian * is in reset and once the reset is complete, any 711227651Sadrian * non-empty queues will simply have DMA restarted. 712227651Sadrian */ 713227651Sadrian return; 714227651Sadrian } 715227651Sadrian ATH_PCU_UNLOCK(sc); 716227651Sadrian#endif 717227651Sadrian 718227364Sadrian /* For now, so not to generate whitespace diffs */ 719227364Sadrian if (1) { 720218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 721218065Sadrian int qbusy; 722218065Sadrian 723218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 724218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 725218065Sadrian if (txq->axq_link == NULL) { 726218065Sadrian /* 727218065Sadrian * Be careful writing the address to TXDP. If 728218065Sadrian * the tx q is enabled then this write will be 729218065Sadrian * ignored. Normally this is not an issue but 730218065Sadrian * when tdma is in use and the q is beacon gated 731218065Sadrian * this race can occur. If the q is busy then 732218065Sadrian * defer the work to later--either when another 733218065Sadrian * packet comes along or when we prepare a beacon 734218065Sadrian * frame at SWBA. 735218065Sadrian */ 736218065Sadrian if (!qbusy) { 737229949Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 738229949Sadrian bf->bf_daddr); 739218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 740218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 741218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 742218065Sadrian __func__, txq->axq_qnum, 743218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 744218065Sadrian txq->axq_depth); 745218065Sadrian } else { 746218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 747218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 748218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 749218065Sadrian txq->axq_qnum); 750218065Sadrian } 751218065Sadrian } else { 752218065Sadrian *txq->axq_link = bf->bf_daddr; 753218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 754218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 755218065Sadrian txq->axq_qnum, txq->axq_link, 756229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 757229949Sadrian txq->axq_depth); 758218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 759218065Sadrian /* 760218065Sadrian * The q was busy when we previously tried 761218065Sadrian * to write the address of the first buffer 762218065Sadrian * in the chain. Since it's not busy now 763218065Sadrian * handle this chore. We are certain the 764218065Sadrian * buffer at the front is the right one since 765218065Sadrian * axq_link is NULL only when the buffer list 766218065Sadrian * is/was empty. 767218065Sadrian */ 768218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 769227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 770218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 771218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 772218065Sadrian "%s: Q%u restarted\n", __func__, 773218065Sadrian txq->axq_qnum); 774218065Sadrian } 775218065Sadrian } 776218065Sadrian#else 777218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 778218065Sadrian if (txq->axq_link == NULL) { 779218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 780218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 781218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 782218065Sadrian __func__, txq->axq_qnum, 783218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 784218065Sadrian txq->axq_depth); 785218065Sadrian } else { 786218065Sadrian *txq->axq_link = bf->bf_daddr; 787218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 788218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 789218065Sadrian txq->axq_qnum, txq->axq_link, 790229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 791229949Sadrian txq->axq_depth); 792218065Sadrian } 793218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 794227360Sadrian if (bf->bf_state.bfs_aggr) 795227360Sadrian txq->axq_aggr_depth++; 796238609Sadrian ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link); 797218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 798227364Sadrian } 799227364Sadrian} 800218065Sadrian 801227364Sadrian/* 802227364Sadrian * Restart TX DMA for the given TXQ. 803227364Sadrian * 804227364Sadrian * This must be called whether the queue is empty or not. 805227364Sadrian */ 806238930Sadrianstatic void 807238930Sadrianath_legacy_tx_dma_restart(struct ath_softc *sc, struct ath_txq *txq) 808227364Sadrian{ 809227364Sadrian struct ath_hal *ah = sc->sc_ah; 810232707Sadrian struct ath_buf *bf, *bf_last; 811218065Sadrian 812227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 813227364Sadrian 814227364Sadrian /* This is always going to be cleared, empty or not */ 815227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 816227364Sadrian 817232707Sadrian /* XXX make this ATH_TXQ_FIRST */ 818227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 819232707Sadrian bf_last = ATH_TXQ_LAST(txq, axq_q_s); 820232707Sadrian 821227364Sadrian if (bf == NULL) 822227364Sadrian return; 823227364Sadrian 824227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 825239120Sadrian ath_hal_gettxdesclinkptr(ah, bf_last->bf_lastds, &txq->axq_link); 826227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 827218065Sadrian} 828218065Sadrian 829227364Sadrian/* 830227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 831227364Sadrian * 832227364Sadrian * The relevant hardware txq should be locked. 833227364Sadrian */ 834227364Sadrianstatic void 835238930Sadrianath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq, 836238930Sadrian struct ath_buf *bf) 837227364Sadrian{ 838227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 839227364Sadrian 840227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 841227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 842227364Sadrian else 843227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 844227364Sadrian} 845227364Sadrian 846218154Sadrianstatic int 847218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 848229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 849229949Sadrian int *keyix) 850218154Sadrian{ 851233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 852233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 853233330Sadrian __func__, 854233330Sadrian *hdrlen, 855233330Sadrian *pktlen, 856233330Sadrian isfrag, 857233330Sadrian iswep, 858233330Sadrian m0); 859233330Sadrian 860218154Sadrian if (iswep) { 861218154Sadrian const struct ieee80211_cipher *cip; 862218154Sadrian struct ieee80211_key *k; 863218154Sadrian 864218154Sadrian /* 865218154Sadrian * Construct the 802.11 header+trailer for an encrypted 866218154Sadrian * frame. The only reason this can fail is because of an 867218154Sadrian * unknown or unsupported cipher/key type. 868218154Sadrian */ 869218154Sadrian k = ieee80211_crypto_encap(ni, m0); 870218154Sadrian if (k == NULL) { 871218154Sadrian /* 872218154Sadrian * This can happen when the key is yanked after the 873218154Sadrian * frame was queued. Just discard the frame; the 874218154Sadrian * 802.11 layer counts failures and provides 875218154Sadrian * debugging/diagnostics. 876218154Sadrian */ 877229949Sadrian return (0); 878218154Sadrian } 879218154Sadrian /* 880218154Sadrian * Adjust the packet + header lengths for the crypto 881218154Sadrian * additions and calculate the h/w key index. When 882218154Sadrian * a s/w mic is done the frame will have had any mic 883218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 884218154Sadrian * account for it. Otherwise we need to add it to the 885218154Sadrian * packet length. 886218154Sadrian */ 887218154Sadrian cip = k->wk_cipher; 888218154Sadrian (*hdrlen) += cip->ic_header; 889218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 890218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 891218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 892218154Sadrian (*pktlen) += cip->ic_miclen; 893218154Sadrian (*keyix) = k->wk_keyix; 894218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 895218154Sadrian /* 896218154Sadrian * Use station key cache slot, if assigned. 897218154Sadrian */ 898218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 899218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 900218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 901218154Sadrian } else 902218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 903218154Sadrian 904229949Sadrian return (1); 905218154Sadrian} 906218154Sadrian 907233989Sadrian/* 908233989Sadrian * Calculate whether interoperability protection is required for 909233989Sadrian * this frame. 910233989Sadrian * 911233989Sadrian * This requires the rate control information be filled in, 912233989Sadrian * as the protection requirement depends upon the current 913233989Sadrian * operating mode / PHY. 914233989Sadrian */ 915233989Sadrianstatic void 916233989Sadrianath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf) 917233989Sadrian{ 918233989Sadrian struct ieee80211_frame *wh; 919233989Sadrian uint8_t rix; 920233989Sadrian uint16_t flags; 921233989Sadrian int shortPreamble; 922233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 923233989Sadrian struct ifnet *ifp = sc->sc_ifp; 924233989Sadrian struct ieee80211com *ic = ifp->if_l2com; 925233989Sadrian 926233989Sadrian flags = bf->bf_state.bfs_txflags; 927233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 928233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 929233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 930233989Sadrian 931233989Sadrian /* 932233989Sadrian * If 802.11g protection is enabled, determine whether 933233989Sadrian * to use RTS/CTS or just CTS. Note that this is only 934233989Sadrian * done for OFDM unicast frames. 935233989Sadrian */ 936233989Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 937233989Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 938233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 939233989Sadrian bf->bf_state.bfs_doprot = 1; 940233989Sadrian /* XXX fragments must use CCK rates w/ protection */ 941233989Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 942233989Sadrian flags |= HAL_TXDESC_RTSENA; 943233989Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 944233989Sadrian flags |= HAL_TXDESC_CTSENA; 945233989Sadrian } 946233989Sadrian /* 947233989Sadrian * For frags it would be desirable to use the 948233989Sadrian * highest CCK rate for RTS/CTS. But stations 949233989Sadrian * farther away may detect it at a lower CCK rate 950233989Sadrian * so use the configured protection rate instead 951233989Sadrian * (for now). 952233989Sadrian */ 953233989Sadrian sc->sc_stats.ast_tx_protect++; 954233989Sadrian } 955233989Sadrian 956233989Sadrian /* 957233989Sadrian * If 11n protection is enabled and it's a HT frame, 958233989Sadrian * enable RTS. 959233989Sadrian * 960233989Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 961233989Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 962233989Sadrian * XXX indicates it's not a HT pure environment? 963233989Sadrian */ 964233989Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 965233989Sadrian rt->info[rix].phy == IEEE80211_T_HT && 966233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 967233989Sadrian flags |= HAL_TXDESC_RTSENA; 968233989Sadrian sc->sc_stats.ast_tx_htprotect++; 969233989Sadrian } 970233989Sadrian bf->bf_state.bfs_txflags = flags; 971233989Sadrian} 972233989Sadrian 973233989Sadrian/* 974233989Sadrian * Update the frame duration given the currently selected rate. 975233989Sadrian * 976233989Sadrian * This also updates the frame duration value, so it will require 977233989Sadrian * a DMA flush. 978233989Sadrian */ 979233989Sadrianstatic void 980233989Sadrianath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf) 981233989Sadrian{ 982233989Sadrian struct ieee80211_frame *wh; 983233989Sadrian uint8_t rix; 984233989Sadrian uint16_t flags; 985233989Sadrian int shortPreamble; 986233989Sadrian struct ath_hal *ah = sc->sc_ah; 987233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 988233989Sadrian int isfrag = bf->bf_m->m_flags & M_FRAG; 989233989Sadrian 990233989Sadrian flags = bf->bf_state.bfs_txflags; 991233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 992233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 993233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 994233989Sadrian 995233989Sadrian /* 996233989Sadrian * Calculate duration. This logically belongs in the 802.11 997233989Sadrian * layer but it lacks sufficient information to calculate it. 998233989Sadrian */ 999233989Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 1000233989Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 1001233989Sadrian u_int16_t dur; 1002233989Sadrian if (shortPreamble) 1003233989Sadrian dur = rt->info[rix].spAckDuration; 1004233989Sadrian else 1005233989Sadrian dur = rt->info[rix].lpAckDuration; 1006233989Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 1007233989Sadrian dur += dur; /* additional SIFS+ACK */ 1008233989Sadrian KASSERT(bf->bf_m->m_nextpkt != NULL, ("no fragment")); 1009233989Sadrian /* 1010233989Sadrian * Include the size of next fragment so NAV is 1011233989Sadrian * updated properly. The last fragment uses only 1012233989Sadrian * the ACK duration 1013233989Sadrian */ 1014233989Sadrian dur += ath_hal_computetxtime(ah, rt, 1015233989Sadrian bf->bf_m->m_nextpkt->m_pkthdr.len, 1016233989Sadrian rix, shortPreamble); 1017233989Sadrian } 1018233989Sadrian if (isfrag) { 1019233989Sadrian /* 1020233989Sadrian * Force hardware to use computed duration for next 1021233989Sadrian * fragment by disabling multi-rate retry which updates 1022233989Sadrian * duration based on the multi-rate duration table. 1023233989Sadrian */ 1024233989Sadrian bf->bf_state.bfs_ismrr = 0; 1025233989Sadrian bf->bf_state.bfs_try0 = ATH_TXMGTTRY; 1026233989Sadrian /* XXX update bfs_rc[0].try? */ 1027233989Sadrian } 1028233989Sadrian 1029233989Sadrian /* Update the duration field itself */ 1030233989Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 1031233989Sadrian } 1032233989Sadrian} 1033233989Sadrian 1034218932Sadrianstatic uint8_t 1035218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 1036227364Sadrian int cix, int shortPreamble) 1037218157Sadrian{ 1038218932Sadrian uint8_t ctsrate; 1039218932Sadrian 1040218157Sadrian /* 1041218157Sadrian * CTS transmit rate is derived from the transmit rate 1042218157Sadrian * by looking in the h/w rate table. We must also factor 1043218157Sadrian * in whether or not a short preamble is to be used. 1044218157Sadrian */ 1045218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 1046218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 1047218932Sadrian ctsrate = rt->info[cix].rateCode; 1048218932Sadrian 1049218932Sadrian /* XXX this should only matter for legacy rates */ 1050218932Sadrian if (shortPreamble) 1051218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 1052218932Sadrian 1053229949Sadrian return (ctsrate); 1054218932Sadrian} 1055218932Sadrian 1056218932Sadrian/* 1057218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 1058218932Sadrian */ 1059218932Sadrianstatic int 1060218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 1061218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 1062218932Sadrian int flags) 1063218932Sadrian{ 1064218932Sadrian int ctsduration = 0; 1065218932Sadrian 1066218932Sadrian /* This mustn't be called for HT modes */ 1067218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 1068218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 1069218932Sadrian __func__, rt->info[cix].rateCode); 1070229949Sadrian return (-1); 1071218932Sadrian } 1072218932Sadrian 1073218157Sadrian /* 1074218157Sadrian * Compute the transmit duration based on the frame 1075218157Sadrian * size and the size of an ACK frame. We call into the 1076218157Sadrian * HAL to do the computation since it depends on the 1077218157Sadrian * characteristics of the actual PHY being used. 1078218157Sadrian * 1079218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 1080218157Sadrian * use the precalculated ACK durations. 1081218157Sadrian */ 1082218157Sadrian if (shortPreamble) { 1083218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1084218932Sadrian ctsduration += rt->info[cix].spAckDuration; 1085218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1086218157Sadrian rt, pktlen, rix, AH_TRUE); 1087218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1088218932Sadrian ctsduration += rt->info[rix].spAckDuration; 1089218157Sadrian } else { 1090218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1091218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 1092218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1093218157Sadrian rt, pktlen, rix, AH_FALSE); 1094218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1095218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 1096218157Sadrian } 1097218932Sadrian 1098229949Sadrian return (ctsduration); 1099218157Sadrian} 1100218157Sadrian 1101227364Sadrian/* 1102227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 1103227364Sadrian * values. 1104227364Sadrian * 1105227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 1106227364Sadrian * and cts duration must be re-calculated. 1107227364Sadrian * 1108227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 1109227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 1110227364Sadrian * 1111227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 1112227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 1113227364Sadrian */ 1114227364Sadrianstatic void 1115227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 1116218065Sadrian{ 1117227364Sadrian uint16_t ctsduration = 0; 1118227364Sadrian uint8_t ctsrate = 0; 1119227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 1120227364Sadrian uint8_t cix = 0; 1121227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 1122227364Sadrian 1123227364Sadrian /* 1124227364Sadrian * No RTS/CTS enabled? Don't bother. 1125227364Sadrian */ 1126233966Sadrian if ((bf->bf_state.bfs_txflags & 1127227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 1128227364Sadrian /* XXX is this really needed? */ 1129227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1130227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1131227364Sadrian return; 1132227364Sadrian } 1133227364Sadrian 1134227364Sadrian /* 1135227364Sadrian * If protection is enabled, use the protection rix control 1136227364Sadrian * rate. Otherwise use the rate0 control rate. 1137227364Sadrian */ 1138227364Sadrian if (bf->bf_state.bfs_doprot) 1139227364Sadrian rix = sc->sc_protrix; 1140227364Sadrian else 1141227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 1142227364Sadrian 1143227364Sadrian /* 1144227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 1145227364Sadrian * use it. 1146227364Sadrian */ 1147227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 1148227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 1149227364Sadrian else 1150227364Sadrian /* Control rate from above */ 1151227364Sadrian cix = rt->info[rix].controlRate; 1152227364Sadrian 1153227364Sadrian /* Calculate the rtscts rate for the given cix */ 1154227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 1155227364Sadrian bf->bf_state.bfs_shpream); 1156227364Sadrian 1157227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 1158227364Sadrian if (! ath_tx_is_11n(sc)) 1159227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 1160227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 1161233966Sadrian rt, bf->bf_state.bfs_txflags); 1162227364Sadrian 1163227364Sadrian /* Squirrel away in ath_buf */ 1164227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 1165227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 1166227364Sadrian 1167227364Sadrian /* 1168227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 1169227364Sadrian */ 1170238961Sadrian if (!sc->sc_mrrprot) { 1171238961Sadrian bf->bf_state.bfs_ismrr = 0; 1172238961Sadrian bf->bf_state.bfs_try0 = 1173238961Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 1174238961Sadrian } 1175227364Sadrian} 1176227364Sadrian 1177227364Sadrian/* 1178227364Sadrian * Setup the descriptor chain for a normal or fast-frame 1179227364Sadrian * frame. 1180239051Sadrian * 1181239051Sadrian * XXX TODO: extend to include the destination hardware QCU ID. 1182239051Sadrian * Make sure that is correct. Make sure that when being added 1183239051Sadrian * to the mcastq, the CABQ QCUID is set or things will get a bit 1184239051Sadrian * odd. 1185227364Sadrian */ 1186227364Sadrianstatic void 1187227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 1188227364Sadrian{ 1189227364Sadrian struct ath_desc *ds = bf->bf_desc; 1190227364Sadrian struct ath_hal *ah = sc->sc_ah; 1191227364Sadrian 1192227364Sadrian ath_hal_setuptxdesc(ah, ds 1193227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 1194227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 1195227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 1196227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 1197227364Sadrian , bf->bf_state.bfs_txrate0 1198227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 1199227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 1200227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 1201233966Sadrian , bf->bf_state.bfs_txflags /* flags */ 1202227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 1203227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 1204227364Sadrian ); 1205227364Sadrian 1206227364Sadrian /* 1207227364Sadrian * This will be overriden when the descriptor chain is written. 1208227364Sadrian */ 1209227364Sadrian bf->bf_lastds = ds; 1210227364Sadrian bf->bf_last = bf; 1211227364Sadrian 1212238947Sadrian /* Set rate control and descriptor chain for this frame */ 1213238947Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1214238947Sadrian ath_tx_chaindesclist(sc, bf); 1215227364Sadrian} 1216227364Sadrian 1217227364Sadrian/* 1218227364Sadrian * Do a rate lookup. 1219227364Sadrian * 1220227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 1221227364Sadrian * Non-data frames and raw frames don't require it. 1222227364Sadrian * 1223227364Sadrian * This populates the primary and MRR entries; MRR values are 1224227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 1225227364Sadrian * pre-11n chipsets. 1226227364Sadrian * 1227227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 1228227364Sadrian * as they may depend upon the rate chosen. 1229227364Sadrian */ 1230227364Sadrianstatic void 1231227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 1232227364Sadrian{ 1233227364Sadrian uint8_t rate, rix; 1234227364Sadrian int try0; 1235227364Sadrian 1236227364Sadrian if (! bf->bf_state.bfs_doratelookup) 1237227364Sadrian return; 1238227364Sadrian 1239227364Sadrian /* Get rid of any previous state */ 1240227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1241227364Sadrian 1242227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 1243227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 1244227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 1245227364Sadrian 1246227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 1247227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1248227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 1249227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1250227364Sadrian 1251227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 1252227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 1253227364Sadrian bf->bf_state.bfs_rc); 1254227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 1255227364Sadrian 1256227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 1257227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 1258227364Sadrian bf->bf_state.bfs_try0 = try0; 1259227364Sadrian bf->bf_state.bfs_txrate0 = rate; 1260227364Sadrian} 1261227364Sadrian 1262227364Sadrian/* 1263227364Sadrian * Transmit the given frame to the hardware. 1264227364Sadrian * 1265227364Sadrian * The frame must already be setup; rate control must already have 1266227364Sadrian * been done. 1267227364Sadrian * 1268227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 1269227364Sadrian * it for this long when not doing software aggregation), later on 1270227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 1271227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 1272227364Sadrian */ 1273227364Sadrianstatic void 1274227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 1275227364Sadrian struct ath_buf *bf) 1276227364Sadrian{ 1277227364Sadrian 1278227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1279227364Sadrian 1280227364Sadrian /* Setup the descriptor before handoff */ 1281227364Sadrian ath_tx_do_ratelookup(sc, bf); 1282233989Sadrian ath_tx_calc_duration(sc, bf); 1283233989Sadrian ath_tx_calc_protection(sc, bf); 1284233989Sadrian ath_tx_set_rtscts(sc, bf); 1285227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1286227364Sadrian ath_tx_setds(sc, bf); 1287227364Sadrian 1288227364Sadrian /* Hand off to hardware */ 1289227364Sadrian ath_tx_handoff(sc, txq, bf); 1290227364Sadrian} 1291227364Sadrian 1292227364Sadrian 1293227364Sadrian 1294227364Sadrianstatic int 1295227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1296234009Sadrian struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq) 1297227364Sadrian{ 1298218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1299218065Sadrian struct ath_hal *ah = sc->sc_ah; 1300218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1301218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1302218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1303218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1304227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1305227364Sadrian u_int8_t rix = 0, txrate = 0; 1306218065Sadrian struct ath_desc *ds; 1307218065Sadrian struct ieee80211_frame *wh; 1308227364Sadrian u_int subtype, flags; 1309218065Sadrian HAL_PKT_TYPE atype; 1310218065Sadrian const HAL_RATE_TABLE *rt; 1311218065Sadrian HAL_BOOL shortPreamble; 1312218065Sadrian struct ath_node *an; 1313218065Sadrian u_int pri; 1314218065Sadrian 1315236880Sadrian /* 1316236880Sadrian * To ensure that both sequence numbers and the CCMP PN handling 1317236880Sadrian * is "correct", make sure that the relevant TID queue is locked. 1318236880Sadrian * Otherwise the CCMP PN and seqno may appear out of order, causing 1319236880Sadrian * re-ordered frames to have out of order CCMP PN's, resulting 1320236880Sadrian * in many, many frame drops. 1321236880Sadrian */ 1322236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1323236880Sadrian 1324218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1325218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1326218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1327218065Sadrian isfrag = m0->m_flags & M_FRAG; 1328218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1329218065Sadrian /* 1330218065Sadrian * Packet length must not include any 1331218065Sadrian * pad bytes; deduct them here. 1332218065Sadrian */ 1333218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1334218065Sadrian 1335218154Sadrian /* Handle encryption twiddling if needed */ 1336227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1337227364Sadrian &pktlen, &keyix)) { 1338218154Sadrian ath_freetx(m0); 1339218154Sadrian return EIO; 1340218154Sadrian } 1341218065Sadrian 1342218154Sadrian /* packet header may have moved, reset our local pointer */ 1343218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1344218065Sadrian 1345218065Sadrian pktlen += IEEE80211_CRC_LEN; 1346218065Sadrian 1347218065Sadrian /* 1348218065Sadrian * Load the DMA map so any coalescing is done. This 1349218065Sadrian * also calculates the number of descriptors we need. 1350218065Sadrian */ 1351218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1352218065Sadrian if (error != 0) 1353218065Sadrian return error; 1354218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1355218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1356218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1357218065Sadrian 1358218065Sadrian /* setup descriptors */ 1359218065Sadrian ds = bf->bf_desc; 1360218065Sadrian rt = sc->sc_currates; 1361218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1362218065Sadrian 1363218065Sadrian /* 1364218065Sadrian * NB: the 802.11 layer marks whether or not we should 1365218065Sadrian * use short preamble based on the current mode and 1366218065Sadrian * negotiated parameters. 1367218065Sadrian */ 1368218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1369218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1370218065Sadrian shortPreamble = AH_TRUE; 1371218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1372218065Sadrian } else { 1373218065Sadrian shortPreamble = AH_FALSE; 1374218065Sadrian } 1375218065Sadrian 1376218065Sadrian an = ATH_NODE(ni); 1377218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1378218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1379218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1380218065Sadrian /* XXX use txparams instead of fixed values */ 1381218065Sadrian /* 1382218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1383218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1384218065Sadrian */ 1385218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1386218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1387218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1388218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1389218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1390218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1391218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1392218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1393218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1394218065Sadrian else 1395218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1396218065Sadrian rix = an->an_mgmtrix; 1397218065Sadrian txrate = rt->info[rix].rateCode; 1398218065Sadrian if (shortPreamble) 1399218065Sadrian txrate |= rt->info[rix].shortPreamble; 1400218065Sadrian try0 = ATH_TXMGTTRY; 1401218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1402218065Sadrian break; 1403218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1404218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1405218065Sadrian rix = an->an_mgmtrix; 1406218065Sadrian txrate = rt->info[rix].rateCode; 1407218065Sadrian if (shortPreamble) 1408218065Sadrian txrate |= rt->info[rix].shortPreamble; 1409218065Sadrian try0 = ATH_TXMGTTRY; 1410218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1411218065Sadrian break; 1412218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1413218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1414218065Sadrian /* 1415218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1416218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1417218065Sadrian * the rate control module for the rate to use. 1418218065Sadrian */ 1419218065Sadrian if (ismcast) { 1420218065Sadrian rix = an->an_mcastrix; 1421218065Sadrian txrate = rt->info[rix].rateCode; 1422218065Sadrian if (shortPreamble) 1423218065Sadrian txrate |= rt->info[rix].shortPreamble; 1424218065Sadrian try0 = 1; 1425218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1426218065Sadrian /* XXX? maybe always use long preamble? */ 1427218065Sadrian rix = an->an_mgmtrix; 1428218065Sadrian txrate = rt->info[rix].rateCode; 1429218065Sadrian if (shortPreamble) 1430218065Sadrian txrate |= rt->info[rix].shortPreamble; 1431218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1432218065Sadrian } else { 1433227364Sadrian /* 1434227364Sadrian * Do rate lookup on each TX, rather than using 1435227364Sadrian * the hard-coded TX information decided here. 1436227364Sadrian */ 1437227364Sadrian ismrr = 1; 1438227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1439218065Sadrian } 1440218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1441218065Sadrian flags |= HAL_TXDESC_NOACK; 1442218065Sadrian break; 1443218065Sadrian default: 1444218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1445218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1446218065Sadrian /* XXX statistic */ 1447218065Sadrian ath_freetx(m0); 1448218065Sadrian return EIO; 1449218065Sadrian } 1450218065Sadrian 1451237041Sadrian /* 1452237041Sadrian * There are two known scenarios where the frame AC doesn't match 1453237041Sadrian * what the destination TXQ is. 1454237041Sadrian * 1455237041Sadrian * + non-QoS frames (eg management?) that the net80211 stack has 1456237041Sadrian * assigned a higher AC to, but since it's a non-QoS TID, it's 1457237041Sadrian * being thrown into TID 16. TID 16 gets the AC_BE queue. 1458237041Sadrian * It's quite possible that management frames should just be 1459237041Sadrian * direct dispatched to hardware rather than go via the software 1460237041Sadrian * queue; that should be investigated in the future. There are 1461237041Sadrian * some specific scenarios where this doesn't make sense, mostly 1462237041Sadrian * surrounding ADDBA request/response - hence why that is special 1463237041Sadrian * cased. 1464237041Sadrian * 1465237041Sadrian * + Multicast frames going into the VAP mcast queue. That shows up 1466237041Sadrian * as "TXQ 11". 1467237041Sadrian * 1468237041Sadrian * This driver should eventually support separate TID and TXQ locking, 1469237041Sadrian * allowing for arbitrary AC frames to appear on arbitrary software 1470237041Sadrian * queues, being queued to the "correct" hardware queue when needed. 1471237041Sadrian */ 1472237041Sadrian#if 0 1473235750Sadrian if (txq != sc->sc_ac2q[pri]) { 1474235750Sadrian device_printf(sc->sc_dev, 1475235750Sadrian "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n", 1476235750Sadrian __func__, 1477235750Sadrian txq, 1478235750Sadrian txq->axq_qnum, 1479235750Sadrian pri, 1480235750Sadrian sc->sc_ac2q[pri], 1481235750Sadrian sc->sc_ac2q[pri]->axq_qnum); 1482235750Sadrian } 1483237041Sadrian#endif 1484235750Sadrian 1485218065Sadrian /* 1486218065Sadrian * Calculate miscellaneous flags. 1487218065Sadrian */ 1488218065Sadrian if (ismcast) { 1489218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1490218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1491218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1492218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1493218065Sadrian sc->sc_stats.ast_tx_rts++; 1494218065Sadrian } 1495218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1496218065Sadrian sc->sc_stats.ast_tx_noack++; 1497218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1498218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1499218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1500218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1501218065Sadrian sc->sc_stats.ast_tdma_ack++; 1502218065Sadrian ath_freetx(m0); 1503218065Sadrian return EIO; 1504218065Sadrian } 1505218065Sadrian#endif 1506218065Sadrian 1507218065Sadrian /* 1508227364Sadrian * Determine if a tx interrupt should be generated for 1509227364Sadrian * this descriptor. We take a tx interrupt to reap 1510227364Sadrian * descriptors when the h/w hits an EOL condition or 1511227364Sadrian * when the descriptor is specifically marked to generate 1512227364Sadrian * an interrupt. We periodically mark descriptors in this 1513227364Sadrian * way to insure timely replenishing of the supply needed 1514227364Sadrian * for sending frames. Defering interrupts reduces system 1515227364Sadrian * load and potentially allows more concurrent work to be 1516227364Sadrian * done but if done to aggressively can cause senders to 1517227364Sadrian * backup. 1518227364Sadrian * 1519227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1520227364Sadrian * dynamically through sysctl. 1521218065Sadrian */ 1522227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1523227364Sadrian txq->axq_intrcnt = 0; 1524227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1525227364Sadrian flags |= HAL_TXDESC_INTREQ; 1526227364Sadrian txq->axq_intrcnt = 0; 1527227364Sadrian } 1528218932Sadrian 1529227364Sadrian /* This point forward is actual TX bits */ 1530218065Sadrian 1531218065Sadrian /* 1532218065Sadrian * At this point we are committed to sending the frame 1533218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1534218065Sadrian * case this frame is part of frag chain. 1535218065Sadrian */ 1536218065Sadrian m0->m_nextpkt = NULL; 1537218065Sadrian 1538218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1539218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1540218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1541218065Sadrian 1542218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1543218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1544218065Sadrian 1545218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1546218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1547218065Sadrian if (iswep) 1548218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1549218065Sadrian if (isfrag) 1550218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1551218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1552218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1553218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1554218065Sadrian 1555218065Sadrian ieee80211_radiotap_tx(vap, m0); 1556218065Sadrian } 1557218065Sadrian 1558227364Sadrian /* Blank the legacy rate array */ 1559227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1560227364Sadrian 1561218065Sadrian /* 1562227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1563227364Sadrian * the rate scenario. 1564227364Sadrian */ 1565227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1566227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1567227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1568227364Sadrian 1569227364Sadrian /* Store the decided rate index values away */ 1570227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1571227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1572227364Sadrian bf->bf_state.bfs_atype = atype; 1573227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1574227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1575227364Sadrian bf->bf_state.bfs_try0 = try0; 1576227364Sadrian bf->bf_state.bfs_keyix = keyix; 1577227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1578233966Sadrian bf->bf_state.bfs_txflags = flags; 1579227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1580227364Sadrian 1581227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1582227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1583227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1584227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1585227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1586227364Sadrian 1587227364Sadrian return 0; 1588227364Sadrian} 1589227364Sadrian 1590227364Sadrian/* 1591227364Sadrian * Direct-dispatch the current frame to the hardware. 1592227364Sadrian * 1593227364Sadrian * This can be called by the net80211 code. 1594227364Sadrian * 1595227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1596227364Sadrian * XXX aggregate scheduler so its serialised? 1597227364Sadrian */ 1598227364Sadrianint 1599227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1600227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1601227364Sadrian{ 1602227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1603227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1604232764Sadrian int r = 0; 1605227364Sadrian u_int pri; 1606227364Sadrian int tid; 1607227364Sadrian struct ath_txq *txq; 1608227364Sadrian int ismcast; 1609227364Sadrian const struct ieee80211_frame *wh; 1610227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1611236872Sadrian ieee80211_seq seqno; 1612227364Sadrian uint8_t type, subtype; 1613227364Sadrian 1614227364Sadrian /* 1615227364Sadrian * Determine the target hardware queue. 1616218065Sadrian * 1617234009Sadrian * For multicast frames, the txq gets overridden appropriately 1618234009Sadrian * depending upon the state of PS. 1619227364Sadrian * 1620227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1621227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1622227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1623227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1624227364Sadrian * having a node TID queued to multiple hardware TXQs. 1625227364Sadrian * This may change in the future but would require some locking 1626227364Sadrian * fudgery. 1627218065Sadrian */ 1628227364Sadrian pri = ath_tx_getac(sc, m0); 1629227364Sadrian tid = ath_tx_gettid(sc, m0); 1630218065Sadrian 1631227364Sadrian txq = sc->sc_ac2q[pri]; 1632227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1633227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1634227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1635227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1636227364Sadrian 1637232764Sadrian /* 1638232764Sadrian * Enforce how deep the multicast queue can grow. 1639232764Sadrian * 1640232764Sadrian * XXX duplicated in ath_raw_xmit(). 1641232764Sadrian */ 1642232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1643232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1644232764Sadrian 1645232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1646232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1647232764Sadrian r = ENOBUFS; 1648232764Sadrian } 1649232764Sadrian 1650232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1651232764Sadrian 1652232764Sadrian if (r != 0) { 1653232764Sadrian m_freem(m0); 1654232764Sadrian return r; 1655232764Sadrian } 1656232764Sadrian } 1657232764Sadrian 1658227364Sadrian /* A-MPDU TX */ 1659227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1660227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1661227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1662227364Sadrian 1663236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1664236872Sadrian __func__, tid, pri, is_ampdu); 1665227364Sadrian 1666239051Sadrian /* Set local packet state, used to queue packets to hardware */ 1667239051Sadrian bf->bf_state.bfs_tid = tid; 1668239051Sadrian bf->bf_state.bfs_txq = txq; 1669239051Sadrian bf->bf_state.bfs_pri = pri; 1670239051Sadrian 1671232753Sadrian /* 1672234009Sadrian * When servicing one or more stations in power-save mode 1673234009Sadrian * (or) if there is some mcast data waiting on the mcast 1674234009Sadrian * queue (to prevent out of order delivery) multicast frames 1675234009Sadrian * must be bufferd until after the beacon. 1676234009Sadrian * 1677234009Sadrian * TODO: we should lock the mcastq before we check the length. 1678232753Sadrian */ 1679239051Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) { 1680227364Sadrian txq = &avp->av_mcastq; 1681239051Sadrian /* 1682239051Sadrian * Mark the frame as eventually belonging on the CAB 1683239051Sadrian * queue, so the descriptor setup functions will 1684239051Sadrian * correctly initialise the descriptor 'qcuId' field. 1685239051Sadrian */ 1686239051Sadrian bf->bf_state.bfs_txq = sc->sc_cabq; 1687239051Sadrian } 1688227364Sadrian 1689227364Sadrian /* Do the generic frame setup */ 1690227364Sadrian /* XXX should just bzero the bf_state? */ 1691227364Sadrian bf->bf_state.bfs_dobaw = 0; 1692227364Sadrian 1693236880Sadrian /* 1694236880Sadrian * Acquire the TXQ lock early, so both the encap and seqno 1695236880Sadrian * are allocated together. 1696239051Sadrian * 1697239051Sadrian * XXX should TXQ for CABQ traffic be the multicast queue, 1698239051Sadrian * or the TXQ the given PRI would allocate from? (eg for 1699239051Sadrian * sequence number allocation locking.) 1700236880Sadrian */ 1701236880Sadrian ATH_TXQ_LOCK(txq); 1702236880Sadrian 1703227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1704236880Sadrian /* 1705236880Sadrian * Don't do it whilst pending; the net80211 layer still 1706236880Sadrian * assigns them. 1707236880Sadrian */ 1708227364Sadrian if (is_ampdu_tx) { 1709227364Sadrian /* 1710227364Sadrian * Always call; this function will 1711227364Sadrian * handle making sure that null data frames 1712227364Sadrian * don't get a sequence number from the current 1713227364Sadrian * TID and thus mess with the BAW. 1714227364Sadrian */ 1715236872Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1716236874Sadrian 1717236874Sadrian /* 1718236874Sadrian * Don't add QoS NULL frames to the BAW. 1719236874Sadrian */ 1720236872Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1721236872Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1722227364Sadrian bf->bf_state.bfs_dobaw = 1; 1723227364Sadrian } 1724218240Sadrian } 1725218240Sadrian 1726218065Sadrian /* 1727227364Sadrian * If needed, the sequence number has been assigned. 1728227364Sadrian * Squirrel it away somewhere easy to get to. 1729218065Sadrian */ 1730236872Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1731227364Sadrian 1732227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1733227364Sadrian if (is_ampdu_pending) 1734227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1735227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1736227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1737227364Sadrian 1738227364Sadrian /* This also sets up the DMA map */ 1739234009Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0, txq); 1740227364Sadrian 1741227364Sadrian if (r != 0) 1742236880Sadrian goto done; 1743227364Sadrian 1744227364Sadrian /* At this point m0 could have changed! */ 1745227364Sadrian m0 = bf->bf_m; 1746227364Sadrian 1747227364Sadrian#if 1 1748218065Sadrian /* 1749227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1750227364Sadrian * destination hardware queue. Don't bother software 1751227364Sadrian * queuing it. 1752218065Sadrian */ 1753227364Sadrian /* 1754227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1755227364Sadrian * destination hardware queue. Don't bother software 1756227364Sadrian * queuing it, as the TID will now be paused. 1757227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1758227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1759227364Sadrian * It queues directly to hardware because the TID is paused 1760227364Sadrian * at this point (and won't be unpaused until the BAR has 1761227364Sadrian * either been TXed successfully or max retries has been 1762227364Sadrian * reached.) 1763227364Sadrian */ 1764227364Sadrian if (txq == &avp->av_mcastq) { 1765235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1766233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1767227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1768227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1769227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1770235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1771227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1772227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1773227364Sadrian } else { 1774227364Sadrian /* add to software queue */ 1775235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1776233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1777227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1778227364Sadrian } 1779227364Sadrian#else 1780227364Sadrian /* 1781227364Sadrian * For now, since there's no software queue, 1782227364Sadrian * direct-dispatch to the hardware. 1783227364Sadrian */ 1784227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1785236880Sadrian#endif 1786236880Sadriandone: 1787227364Sadrian ATH_TXQ_UNLOCK(txq); 1788218065Sadrian 1789218065Sadrian return 0; 1790218065Sadrian} 1791218065Sadrian 1792218065Sadrianstatic int 1793218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1794218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1795218065Sadrian const struct ieee80211_bpf_params *params) 1796218065Sadrian{ 1797218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1798218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1799218065Sadrian struct ath_hal *ah = sc->sc_ah; 1800218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1801218065Sadrian int error, ismcast, ismrr; 1802218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1803227364Sadrian u_int8_t rix, txrate; 1804218065Sadrian struct ieee80211_frame *wh; 1805227364Sadrian u_int flags; 1806218065Sadrian HAL_PKT_TYPE atype; 1807218065Sadrian const HAL_RATE_TABLE *rt; 1808218065Sadrian struct ath_desc *ds; 1809218065Sadrian u_int pri; 1810227364Sadrian int o_tid = -1; 1811227364Sadrian int do_override; 1812218065Sadrian 1813218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1814218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1815218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1816218065Sadrian /* 1817218065Sadrian * Packet length must not include any 1818218065Sadrian * pad bytes; deduct them here. 1819218065Sadrian */ 1820218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1821218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1822218065Sadrian 1823227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1824227364Sadrian __func__, ismcast); 1825227364Sadrian 1826236880Sadrian pri = params->ibp_pri & 3; 1827236880Sadrian /* Override pri if the frame isn't a QoS one */ 1828236880Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1829236880Sadrian pri = ath_tx_getac(sc, m0); 1830236880Sadrian 1831236880Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1832236880Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1833236880Sadrian 1834236880Sadrian /* Map ADDBA to the correct priority */ 1835236880Sadrian if (do_override) { 1836236880Sadrian#if 0 1837236880Sadrian device_printf(sc->sc_dev, 1838236880Sadrian "%s: overriding tid %d pri %d -> %d\n", 1839236880Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1840236880Sadrian#endif 1841236880Sadrian pri = TID_TO_WME_AC(o_tid); 1842236880Sadrian } 1843236880Sadrian 1844236880Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1845236880Sadrian 1846218154Sadrian /* Handle encryption twiddling if needed */ 1847227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1848227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1849227364Sadrian &hdrlen, &pktlen, &keyix)) { 1850218154Sadrian ath_freetx(m0); 1851218154Sadrian return EIO; 1852218154Sadrian } 1853218154Sadrian /* packet header may have moved, reset our local pointer */ 1854218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1855218065Sadrian 1856227364Sadrian /* Do the generic frame setup */ 1857227364Sadrian /* XXX should just bzero the bf_state? */ 1858227364Sadrian bf->bf_state.bfs_dobaw = 0; 1859227364Sadrian 1860218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1861218065Sadrian if (error != 0) 1862218065Sadrian return error; 1863218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1864218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1865218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1866218065Sadrian 1867218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1868218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1869218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1870218065Sadrian flags |= HAL_TXDESC_RTSENA; 1871227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1872227364Sadrian /* XXX assume 11g/11n protection? */ 1873227364Sadrian bf->bf_state.bfs_doprot = 1; 1874218065Sadrian flags |= HAL_TXDESC_CTSENA; 1875227364Sadrian } 1876218065Sadrian /* XXX leave ismcast to injector? */ 1877218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1878218065Sadrian flags |= HAL_TXDESC_NOACK; 1879218065Sadrian 1880218065Sadrian rt = sc->sc_currates; 1881218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1882218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1883218065Sadrian txrate = rt->info[rix].rateCode; 1884218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1885218065Sadrian txrate |= rt->info[rix].shortPreamble; 1886218065Sadrian sc->sc_txrix = rix; 1887218065Sadrian try0 = params->ibp_try0; 1888218065Sadrian ismrr = (params->ibp_try1 != 0); 1889218065Sadrian txantenna = params->ibp_pri >> 2; 1890218065Sadrian if (txantenna == 0) /* XXX? */ 1891218065Sadrian txantenna = sc->sc_txantenna; 1892218157Sadrian 1893227364Sadrian /* 1894227364Sadrian * Since ctsrate is fixed, store it away for later 1895227364Sadrian * use when the descriptor fields are being set. 1896227364Sadrian */ 1897227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1898227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1899218157Sadrian 1900218065Sadrian /* 1901218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1902218065Sadrian * set the sequence number, duration, etc. 1903218065Sadrian */ 1904218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1905218065Sadrian 1906218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1907218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1908218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1909218065Sadrian 1910218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1911218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1912218065Sadrian 1913218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1914218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1915218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1916218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1917218065Sadrian if (m0->m_flags & M_FRAG) 1918218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1919218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1920218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1921218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1922218065Sadrian 1923218065Sadrian ieee80211_radiotap_tx(vap, m0); 1924218065Sadrian } 1925218065Sadrian 1926218065Sadrian /* 1927218065Sadrian * Formulate first tx descriptor with tx controls. 1928218065Sadrian */ 1929218065Sadrian ds = bf->bf_desc; 1930218065Sadrian /* XXX check return value? */ 1931227364Sadrian 1932227364Sadrian /* Store the decided rate index values away */ 1933227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1934227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1935227364Sadrian bf->bf_state.bfs_atype = atype; 1936227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1937227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1938227364Sadrian bf->bf_state.bfs_try0 = try0; 1939227364Sadrian bf->bf_state.bfs_keyix = keyix; 1940227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1941233966Sadrian bf->bf_state.bfs_txflags = flags; 1942227364Sadrian bf->bf_state.bfs_shpream = 1943227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1944218065Sadrian 1945239051Sadrian /* Set local packet state, used to queue packets to hardware */ 1946239051Sadrian bf->bf_state.bfs_tid = WME_AC_TO_TID(pri); 1947239051Sadrian bf->bf_state.bfs_txq = sc->sc_ac2q[pri]; 1948239051Sadrian bf->bf_state.bfs_pri = pri; 1949239051Sadrian 1950227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1951227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1952227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1953227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1954218240Sadrian 1955227364Sadrian /* Blank the legacy rate array */ 1956227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1957218240Sadrian 1958227364Sadrian bf->bf_state.bfs_rc[0].rix = 1959227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1960227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1961227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1962227364Sadrian 1963227364Sadrian if (ismrr) { 1964227364Sadrian int rix; 1965227364Sadrian 1966227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1967227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1968227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1969227364Sadrian 1970227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1971227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1972227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1973227364Sadrian 1974227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1975227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1976227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1977218065Sadrian } 1978227364Sadrian /* 1979227364Sadrian * All the required rate control decisions have been made; 1980227364Sadrian * fill in the rc flags. 1981227364Sadrian */ 1982227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1983218065Sadrian 1984227364Sadrian /* NB: no buffered multicast in power save support */ 1985227364Sadrian 1986227364Sadrian /* 1987227364Sadrian * If we're overiding the ADDBA destination, dump directly 1988227364Sadrian * into the hardware queue, right after any pending 1989227364Sadrian * frames to that node are. 1990227364Sadrian */ 1991227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1992227364Sadrian __func__, do_override); 1993227364Sadrian 1994227364Sadrian if (do_override) { 1995227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1996227364Sadrian } else { 1997227364Sadrian /* Queue to software queue */ 1998227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1999227364Sadrian } 2000236880Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 2001227364Sadrian 2002218065Sadrian return 0; 2003218065Sadrian} 2004218065Sadrian 2005227364Sadrian/* 2006227364Sadrian * Send a raw frame. 2007227364Sadrian * 2008227364Sadrian * This can be called by net80211. 2009227364Sadrian */ 2010218065Sadrianint 2011218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2012218065Sadrian const struct ieee80211_bpf_params *params) 2013218065Sadrian{ 2014218065Sadrian struct ieee80211com *ic = ni->ni_ic; 2015218065Sadrian struct ifnet *ifp = ic->ic_ifp; 2016218065Sadrian struct ath_softc *sc = ifp->if_softc; 2017218065Sadrian struct ath_buf *bf; 2018232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 2019232764Sadrian int error = 0; 2020218065Sadrian 2021227651Sadrian ATH_PCU_LOCK(sc); 2022227651Sadrian if (sc->sc_inreset_cnt > 0) { 2023227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 2024227651Sadrian __func__); 2025227651Sadrian error = EIO; 2026227651Sadrian ATH_PCU_UNLOCK(sc); 2027227651Sadrian goto bad0; 2028227651Sadrian } 2029227651Sadrian sc->sc_txstart_cnt++; 2030227651Sadrian ATH_PCU_UNLOCK(sc); 2031227651Sadrian 2032218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 2033218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 2034218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 2035218065Sadrian "!running" : "invalid"); 2036218065Sadrian m_freem(m); 2037218065Sadrian error = ENETDOWN; 2038218065Sadrian goto bad; 2039218065Sadrian } 2040232764Sadrian 2041218065Sadrian /* 2042232764Sadrian * Enforce how deep the multicast queue can grow. 2043232764Sadrian * 2044232764Sadrian * XXX duplicated in ath_tx_start(). 2045232764Sadrian */ 2046232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2047232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 2048232764Sadrian 2049232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 2050232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 2051232764Sadrian error = ENOBUFS; 2052232764Sadrian } 2053232764Sadrian 2054232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 2055232764Sadrian 2056232764Sadrian if (error != 0) { 2057232764Sadrian m_freem(m); 2058232764Sadrian goto bad; 2059232764Sadrian } 2060232764Sadrian } 2061232764Sadrian 2062232764Sadrian /* 2063218065Sadrian * Grab a TX buffer and associated resources. 2064218065Sadrian */ 2065237000Sadrian bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 2066218065Sadrian if (bf == NULL) { 2067218065Sadrian sc->sc_stats.ast_tx_nobuf++; 2068218065Sadrian m_freem(m); 2069218065Sadrian error = ENOBUFS; 2070218065Sadrian goto bad; 2071218065Sadrian } 2072218065Sadrian 2073218065Sadrian if (params == NULL) { 2074218065Sadrian /* 2075218065Sadrian * Legacy path; interpret frame contents to decide 2076218065Sadrian * precisely how to send the frame. 2077218065Sadrian */ 2078218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 2079218065Sadrian error = EIO; /* XXX */ 2080218065Sadrian goto bad2; 2081218065Sadrian } 2082218065Sadrian } else { 2083218065Sadrian /* 2084218065Sadrian * Caller supplied explicit parameters to use in 2085218065Sadrian * sending the frame. 2086218065Sadrian */ 2087218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 2088218065Sadrian error = EIO; /* XXX */ 2089218065Sadrian goto bad2; 2090218065Sadrian } 2091218065Sadrian } 2092218065Sadrian sc->sc_wd_timer = 5; 2093218065Sadrian ifp->if_opackets++; 2094218065Sadrian sc->sc_stats.ast_tx_raw++; 2095218065Sadrian 2096227651Sadrian ATH_PCU_LOCK(sc); 2097227651Sadrian sc->sc_txstart_cnt--; 2098227651Sadrian ATH_PCU_UNLOCK(sc); 2099227651Sadrian 2100218065Sadrian return 0; 2101218065Sadrianbad2: 2102218065Sadrian ATH_TXBUF_LOCK(sc); 2103236993Sadrian ath_returnbuf_head(sc, bf); 2104218065Sadrian ATH_TXBUF_UNLOCK(sc); 2105218065Sadrianbad: 2106227651Sadrian ATH_PCU_LOCK(sc); 2107227651Sadrian sc->sc_txstart_cnt--; 2108227651Sadrian ATH_PCU_UNLOCK(sc); 2109227651Sadrianbad0: 2110218065Sadrian ifp->if_oerrors++; 2111218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 2112218065Sadrian ieee80211_free_node(ni); 2113227651Sadrian 2114218065Sadrian return error; 2115218065Sadrian} 2116227364Sadrian 2117227364Sadrian/* Some helper functions */ 2118227364Sadrian 2119227364Sadrian/* 2120227364Sadrian * ADDBA (and potentially others) need to be placed in the same 2121227364Sadrian * hardware queue as the TID/node it's relating to. This is so 2122227364Sadrian * it goes out after any pending non-aggregate frames to the 2123227364Sadrian * same node/TID. 2124227364Sadrian * 2125227364Sadrian * If this isn't done, the ADDBA can go out before the frames 2126227364Sadrian * queued in hardware. Even though these frames have a sequence 2127227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 2128227364Sadrian * no frames whose sequence numbers are after the ADDBA should 2129227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 2130227364Sadrian * will simply drop them as being out of the BAW. 2131227364Sadrian * 2132227364Sadrian * The frames can't be appended to the TID software queue - it'll 2133227364Sadrian * never be sent out. So these frames have to be directly 2134227364Sadrian * dispatched to the hardware, rather than queued in software. 2135227364Sadrian * So if this function returns true, the TXQ has to be 2136227364Sadrian * overridden and it has to be directly dispatched. 2137227364Sadrian * 2138227364Sadrian * It's a dirty hack, but someone's gotta do it. 2139227364Sadrian */ 2140227364Sadrian 2141227364Sadrian/* 2142227364Sadrian * XXX doesn't belong here! 2143227364Sadrian */ 2144227364Sadrianstatic int 2145227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 2146227364Sadrian{ 2147227364Sadrian /* Type: Management frame? */ 2148227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 2149227364Sadrian IEEE80211_FC0_TYPE_MGT) 2150227364Sadrian return 0; 2151227364Sadrian 2152227364Sadrian /* Subtype: Action frame? */ 2153227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 2154227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 2155227364Sadrian return 0; 2156227364Sadrian 2157227364Sadrian return 1; 2158227364Sadrian} 2159227364Sadrian 2160227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 2161227364Sadrian/* 2162227364Sadrian * Return an alternate TID for ADDBA request frames. 2163227364Sadrian * 2164227364Sadrian * Yes, this likely should be done in the net80211 layer. 2165227364Sadrian */ 2166227364Sadrianstatic int 2167227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 2168227364Sadrian struct ieee80211_node *ni, 2169227364Sadrian struct mbuf *m0, int *tid) 2170227364Sadrian{ 2171227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 2172227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 2173227364Sadrian uint8_t *frm; 2174227364Sadrian uint16_t baparamset; 2175227364Sadrian 2176227364Sadrian /* Not action frame? Bail */ 2177227364Sadrian if (! ieee80211_is_action(wh)) 2178227364Sadrian return 0; 2179227364Sadrian 2180227364Sadrian /* XXX Not needed for frames we send? */ 2181227364Sadrian#if 0 2182227364Sadrian /* Correct length? */ 2183227364Sadrian if (! ieee80211_parse_action(ni, m)) 2184227364Sadrian return 0; 2185227364Sadrian#endif 2186227364Sadrian 2187227364Sadrian /* Extract out action frame */ 2188227364Sadrian frm = (u_int8_t *)&wh[1]; 2189227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 2190227364Sadrian 2191227364Sadrian /* Not ADDBA? Bail */ 2192227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 2193227364Sadrian return 0; 2194227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 2195227364Sadrian return 0; 2196227364Sadrian 2197227364Sadrian /* Extract TID, return it */ 2198227364Sadrian baparamset = le16toh(ia->rq_baparamset); 2199227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 2200227364Sadrian 2201227364Sadrian return 1; 2202227364Sadrian} 2203227364Sadrian#undef MS 2204227364Sadrian 2205227364Sadrian/* Per-node software queue operations */ 2206227364Sadrian 2207227364Sadrian/* 2208227364Sadrian * Add the current packet to the given BAW. 2209227364Sadrian * It is assumed that the current packet 2210227364Sadrian * 2211227364Sadrian * + fits inside the BAW; 2212227364Sadrian * + already has had a sequence number allocated. 2213227364Sadrian * 2214227364Sadrian * Since the BAW status may be modified by both the ath task and 2215227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2216227364Sadrian */ 2217227364Sadrianvoid 2218227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 2219227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 2220227364Sadrian{ 2221227364Sadrian int index, cindex; 2222227364Sadrian struct ieee80211_tx_ampdu *tap; 2223227364Sadrian 2224227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2225236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2226227364Sadrian 2227227364Sadrian if (bf->bf_state.bfs_isretried) 2228227364Sadrian return; 2229227364Sadrian 2230236886Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2231236886Sadrian 2232236880Sadrian if (! bf->bf_state.bfs_dobaw) { 2233236880Sadrian device_printf(sc->sc_dev, 2234236880Sadrian "%s: dobaw=0, seqno=%d, window %d:%d\n", 2235236880Sadrian __func__, 2236236880Sadrian SEQNO(bf->bf_state.bfs_seqno), 2237236880Sadrian tap->txa_start, 2238236880Sadrian tap->txa_wnd); 2239236880Sadrian } 2240236880Sadrian 2241227364Sadrian if (bf->bf_state.bfs_addedbaw) 2242227364Sadrian device_printf(sc->sc_dev, 2243236872Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 2244229949Sadrian "baw head=%d tail=%d\n", 2245236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2246229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2247229949Sadrian tid->baw_tail); 2248227364Sadrian 2249227364Sadrian /* 2250236880Sadrian * Verify that the given sequence number is not outside of the 2251236880Sadrian * BAW. Complain loudly if that's the case. 2252236880Sadrian */ 2253236880Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2254236880Sadrian SEQNO(bf->bf_state.bfs_seqno))) { 2255236880Sadrian device_printf(sc->sc_dev, 2256236880Sadrian "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; " 2257236880Sadrian "baw head=%d tail=%d\n", 2258236880Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2259236880Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2260236880Sadrian tid->baw_tail); 2261236880Sadrian } 2262236880Sadrian 2263236880Sadrian /* 2264227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2265227364Sadrian * the txa state contains the current baw start. 2266227364Sadrian */ 2267227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2268227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2269227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2270236872Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2271229949Sadrian "baw head=%d tail=%d\n", 2272236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2273229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2274229949Sadrian tid->baw_tail); 2275227364Sadrian 2276227364Sadrian 2277227364Sadrian#if 0 2278227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2279227364Sadrian#endif 2280227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2281227364Sadrian device_printf(sc->sc_dev, 2282227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2283227364Sadrian "head=%d, tail=%d)\n", 2284227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2285227364Sadrian device_printf(sc->sc_dev, 2286227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2287227364Sadrian __func__, 2288227364Sadrian tid->tx_buf[cindex], 2289227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2290227364Sadrian bf, 2291227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2292227364Sadrian ); 2293227364Sadrian } 2294227364Sadrian tid->tx_buf[cindex] = bf; 2295227364Sadrian 2296229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2297229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2298227364Sadrian tid->baw_tail = cindex; 2299227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2300227364Sadrian } 2301227364Sadrian} 2302227364Sadrian 2303227364Sadrian/* 2304227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2305227398Sadrian * 2306227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2307227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2308227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2309227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2310227398Sadrian * tracking array to maintain consistency. 2311227398Sadrian */ 2312227398Sadrianstatic void 2313227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2314227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2315227398Sadrian{ 2316227398Sadrian int index, cindex; 2317227398Sadrian struct ieee80211_tx_ampdu *tap; 2318227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2319227398Sadrian 2320227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2321236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2322227398Sadrian 2323227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2324227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2325227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2326227398Sadrian 2327227398Sadrian /* 2328227398Sadrian * Just warn for now; if it happens then we should find out 2329227398Sadrian * about it. It's highly likely the aggregation session will 2330227398Sadrian * soon hang. 2331227398Sadrian */ 2332227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2333227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2334227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2335227398Sadrian __func__); 2336227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2337227398Sadrian __func__, 2338227398Sadrian old_bf->bf_state.bfs_seqno, 2339227398Sadrian new_bf->bf_state.bfs_seqno); 2340227398Sadrian } 2341227398Sadrian 2342227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2343227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2344227398Sadrian " has m BA session may hang.\n", 2345227398Sadrian __func__); 2346227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2347227398Sadrian __func__, 2348227398Sadrian old_bf, new_bf); 2349227398Sadrian } 2350227398Sadrian 2351227398Sadrian tid->tx_buf[cindex] = new_bf; 2352227398Sadrian} 2353227398Sadrian 2354227398Sadrian/* 2355227364Sadrian * seq_start - left edge of BAW 2356227364Sadrian * seq_next - current/next sequence number to allocate 2357227364Sadrian * 2358227364Sadrian * Since the BAW status may be modified by both the ath task and 2359227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2360227364Sadrian */ 2361227364Sadrianstatic void 2362227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2363227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2364227364Sadrian{ 2365227364Sadrian int index, cindex; 2366227364Sadrian struct ieee80211_tx_ampdu *tap; 2367227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2368227364Sadrian 2369227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2370236879Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2371227364Sadrian 2372227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2373227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2374227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2375227364Sadrian 2376227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2377236872Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2378229949Sadrian "baw head=%d, tail=%d\n", 2379236872Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2380227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2381227364Sadrian 2382227364Sadrian /* 2383227364Sadrian * If this occurs then we have a big problem - something else 2384227364Sadrian * has slid tap->txa_start along without updating the BAW 2385227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2386227364Sadrian * completely busted. 2387227364Sadrian * 2388227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2389227364Sadrian * it's quite possible that a cloned buffer is making its way 2390227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2391227364Sadrian */ 2392227364Sadrian if (tid->tx_buf[cindex] != bf) { 2393227364Sadrian device_printf(sc->sc_dev, 2394227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2395227364Sadrian __func__, 2396227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2397227364Sadrian tid->tx_buf[cindex], 2398227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2399227364Sadrian } 2400227364Sadrian 2401227364Sadrian tid->tx_buf[cindex] = NULL; 2402227364Sadrian 2403229949Sadrian while (tid->baw_head != tid->baw_tail && 2404229949Sadrian !tid->tx_buf[tid->baw_head]) { 2405227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2406227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2407227364Sadrian } 2408229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2409229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2410227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2411227364Sadrian} 2412227364Sadrian 2413227364Sadrian/* 2414227364Sadrian * Mark the current node/TID as ready to TX. 2415227364Sadrian * 2416227364Sadrian * This is done to make it easy for the software scheduler to 2417227364Sadrian * find which nodes have data to send. 2418227364Sadrian * 2419227364Sadrian * The TXQ lock must be held. 2420227364Sadrian */ 2421227364Sadrianstatic void 2422227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2423227364Sadrian{ 2424227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2425227364Sadrian 2426227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2427227364Sadrian 2428227364Sadrian if (tid->paused) 2429227364Sadrian return; /* paused, can't schedule yet */ 2430227364Sadrian 2431227364Sadrian if (tid->sched) 2432227364Sadrian return; /* already scheduled */ 2433227364Sadrian 2434227364Sadrian tid->sched = 1; 2435227364Sadrian 2436227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2437227364Sadrian} 2438227364Sadrian 2439227364Sadrian/* 2440227364Sadrian * Mark the current node as no longer needing to be polled for 2441227364Sadrian * TX packets. 2442227364Sadrian * 2443227364Sadrian * The TXQ lock must be held. 2444227364Sadrian */ 2445227364Sadrianstatic void 2446227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2447227364Sadrian{ 2448227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2449227364Sadrian 2450227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2451227364Sadrian 2452227364Sadrian if (tid->sched == 0) 2453227364Sadrian return; 2454227364Sadrian 2455227364Sadrian tid->sched = 0; 2456227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2457227364Sadrian} 2458227364Sadrian 2459227364Sadrian/* 2460227364Sadrian * Assign a sequence number manually to the given frame. 2461227364Sadrian * 2462227364Sadrian * This should only be called for A-MPDU TX frames. 2463227364Sadrian */ 2464236872Sadrianstatic ieee80211_seq 2465227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2466227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2467227364Sadrian{ 2468227364Sadrian struct ieee80211_frame *wh; 2469227364Sadrian int tid, pri; 2470227364Sadrian ieee80211_seq seqno; 2471227364Sadrian uint8_t subtype; 2472227364Sadrian 2473227364Sadrian /* TID lookup */ 2474227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2475227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2476227364Sadrian tid = WME_AC_TO_TID(pri); 2477236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2478236872Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2479227364Sadrian 2480227364Sadrian /* XXX Is it a control frame? Ignore */ 2481227364Sadrian 2482227364Sadrian /* Does the packet require a sequence number? */ 2483227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2484227364Sadrian return -1; 2485227364Sadrian 2486236880Sadrian ATH_TID_LOCK_ASSERT(sc, &(ATH_NODE(ni)->an_tid[tid])); 2487236880Sadrian 2488227364Sadrian /* 2489227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2490227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2491227364Sadrian * 2492227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2493227364Sadrian * data frame sequence number in the aggregation state updates, so 2494227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2495227364Sadrian * RX side. 2496227364Sadrian */ 2497227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2498227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2499236880Sadrian /* XXX no locking for this TID? This is a bit of a problem. */ 2500227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2501227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2502227364Sadrian } else { 2503227364Sadrian /* Manually assign sequence number */ 2504227364Sadrian seqno = ni->ni_txseqs[tid]; 2505227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2506227364Sadrian } 2507227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2508227364Sadrian M_SEQNO_SET(m0, seqno); 2509227364Sadrian 2510227364Sadrian /* Return so caller can do something with it if needed */ 2511236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2512227364Sadrian return seqno; 2513227364Sadrian} 2514227364Sadrian 2515227364Sadrian/* 2516227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2517227364Sadrian * If the frame is out of BAW, queue. 2518227364Sadrian * Otherwise, schedule it as a single frame. 2519227364Sadrian */ 2520227364Sadrianstatic void 2521239051Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, 2522239051Sadrian struct ath_txq *txq, struct ath_buf *bf) 2523227364Sadrian{ 2524227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2525239051Sadrian// struct ath_txq *txq = bf->bf_state.bfs_txq; 2526227364Sadrian struct ieee80211_tx_ampdu *tap; 2527227364Sadrian 2528239051Sadrian if (txq != bf->bf_state.bfs_txq) { 2529239051Sadrian device_printf(sc->sc_dev, "%s: txq %d != bfs_txq %d!\n", 2530239051Sadrian __func__, 2531239051Sadrian txq->axq_qnum, 2532239051Sadrian bf->bf_state.bfs_txq->axq_qnum); 2533239051Sadrian } 2534239051Sadrian 2535227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2536236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2537227364Sadrian 2538227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2539227364Sadrian 2540227364Sadrian /* paused? queue */ 2541227364Sadrian if (tid->paused) { 2542236876Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2543233480Sadrian /* XXX don't sched - we're paused! */ 2544227364Sadrian return; 2545227364Sadrian } 2546227364Sadrian 2547227364Sadrian /* outside baw? queue */ 2548227364Sadrian if (bf->bf_state.bfs_dobaw && 2549227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2550227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2551236878Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2552227364Sadrian ath_tx_tid_sched(sc, tid); 2553227364Sadrian return; 2554227364Sadrian } 2555227364Sadrian 2556240180Sadrian /* 2557240180Sadrian * This is a temporary check and should be removed once 2558240180Sadrian * all the relevant code paths have been fixed. 2559240180Sadrian * 2560240180Sadrian * During aggregate retries, it's possible that the head 2561240180Sadrian * frame will fail (which has the bfs_aggr and bfs_nframes 2562240180Sadrian * fields set for said aggregate) and will be retried as 2563240180Sadrian * a single frame. In this instance, the values should 2564240180Sadrian * be reset or the completion code will get upset with you. 2565240180Sadrian */ 2566240180Sadrian if (bf->bf_state.bfs_aggr != 0 || bf->bf_state.bfs_nframes > 1) { 2567240180Sadrian device_printf(sc->sc_dev, "%s: bfs_aggr=%d, bfs_nframes=%d\n", 2568240180Sadrian __func__, 2569240180Sadrian bf->bf_state.bfs_aggr, 2570240180Sadrian bf->bf_state.bfs_nframes); 2571240180Sadrian bf->bf_state.bfs_aggr = 0; 2572240180Sadrian bf->bf_state.bfs_nframes = 1; 2573240180Sadrian } 2574240180Sadrian 2575227364Sadrian /* Direct dispatch to hardware */ 2576227364Sadrian ath_tx_do_ratelookup(sc, bf); 2577233989Sadrian ath_tx_calc_duration(sc, bf); 2578233989Sadrian ath_tx_calc_protection(sc, bf); 2579233989Sadrian ath_tx_set_rtscts(sc, bf); 2580227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2581227364Sadrian ath_tx_setds(sc, bf); 2582227364Sadrian 2583227364Sadrian /* Statistics */ 2584227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2585227364Sadrian 2586227364Sadrian /* Track per-TID hardware queue depth correctly */ 2587227364Sadrian tid->hwq_depth++; 2588227364Sadrian 2589227364Sadrian /* Add to BAW */ 2590227364Sadrian if (bf->bf_state.bfs_dobaw) { 2591227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2592227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2593227364Sadrian } 2594227364Sadrian 2595227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2596227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2597227364Sadrian 2598227364Sadrian /* Hand off to hardware */ 2599227364Sadrian ath_tx_handoff(sc, txq, bf); 2600227364Sadrian} 2601227364Sadrian 2602227364Sadrian/* 2603227364Sadrian * Attempt to send the packet. 2604227364Sadrian * If the queue isn't busy, direct-dispatch. 2605227364Sadrian * If the queue is busy enough, queue the given packet on the 2606227364Sadrian * relevant software queue. 2607227364Sadrian */ 2608227364Sadrianvoid 2609227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2610227364Sadrian struct ath_buf *bf) 2611227364Sadrian{ 2612227364Sadrian struct ath_node *an = ATH_NODE(ni); 2613227364Sadrian struct ieee80211_frame *wh; 2614227364Sadrian struct ath_tid *atid; 2615227364Sadrian int pri, tid; 2616227364Sadrian struct mbuf *m0 = bf->bf_m; 2617227364Sadrian 2618236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2619236880Sadrian 2620227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2621227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2622227364Sadrian pri = ath_tx_getac(sc, m0); 2623227364Sadrian tid = ath_tx_gettid(sc, m0); 2624227364Sadrian atid = &an->an_tid[tid]; 2625227364Sadrian 2626236873Sadrian ATH_TID_LOCK_ASSERT(sc, atid); 2627236873Sadrian 2628236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2629236872Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2630227364Sadrian 2631227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2632239051Sadrian /* XXX potentially duplicate info, re-check */ 2633239051Sadrian /* XXX remember, txq must be the hardware queue, not the av_mcastq */ 2634227364Sadrian bf->bf_state.bfs_tid = tid; 2635227364Sadrian bf->bf_state.bfs_txq = txq; 2636227364Sadrian bf->bf_state.bfs_pri = pri; 2637227364Sadrian 2638227364Sadrian /* 2639227364Sadrian * If the hardware queue isn't busy, queue it directly. 2640227364Sadrian * If the hardware queue is busy, queue it. 2641227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2642227364Sadrian * queue it. 2643227364Sadrian */ 2644227364Sadrian if (atid->paused) { 2645227364Sadrian /* TID is paused, queue */ 2646236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2647227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2648227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2649227364Sadrian /* AMPDU pending; queue */ 2650236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2651227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2652227364Sadrian /* XXX sched? */ 2653227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2654227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2655236877Sadrian 2656236877Sadrian /* 2657236877Sadrian * Always queue the frame to the tail of the list. 2658236877Sadrian */ 2659236877Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2660236877Sadrian 2661236877Sadrian /* 2662236877Sadrian * If the hardware queue isn't busy, direct dispatch 2663236877Sadrian * the head frame in the list. Don't schedule the 2664236877Sadrian * TID - let it build some more frames first? 2665236877Sadrian * 2666236877Sadrian * Otherwise, schedule the TID. 2667236877Sadrian */ 2668229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2669236877Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2670236877Sadrian ATH_TXQ_REMOVE(atid, bf, bf_list); 2671240180Sadrian 2672240180Sadrian /* 2673240180Sadrian * Ensure it's definitely treated as a non-AMPDU 2674240180Sadrian * frame - this information may have been left 2675240180Sadrian * over from a previous attempt. 2676240180Sadrian */ 2677240180Sadrian bf->bf_state.bfs_aggr = 0; 2678240180Sadrian bf->bf_state.bfs_nframes = 1; 2679240180Sadrian 2680240180Sadrian /* Queue to the hardware */ 2681239051Sadrian ath_tx_xmit_aggr(sc, an, txq, bf); 2682233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2683236872Sadrian "%s: xmit_aggr\n", 2684236872Sadrian __func__); 2685229949Sadrian } else { 2686229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2687236872Sadrian "%s: ampdu; swq'ing\n", 2688236872Sadrian __func__); 2689227364Sadrian ath_tx_tid_sched(sc, atid); 2690227364Sadrian } 2691227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2692227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2693236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2694227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2695227364Sadrian } else { 2696227364Sadrian /* Busy; queue */ 2697236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2698227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2699227364Sadrian ath_tx_tid_sched(sc, atid); 2700227364Sadrian } 2701227364Sadrian} 2702227364Sadrian 2703227364Sadrian/* 2704227364Sadrian * Do the basic frame setup stuff that's required before the frame 2705227364Sadrian * is added to a software queue. 2706227364Sadrian * 2707227364Sadrian * All frames get mostly the same treatment and it's done once. 2708227364Sadrian * Retransmits fiddle with things like the rate control setup, 2709227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2710227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2711227364Sadrian * 2712227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2713227364Sadrian * m0 may not be valid. 2714227364Sadrian */ 2715227364Sadrian 2716227364Sadrian 2717227364Sadrian/* 2718227364Sadrian * Configure the per-TID node state. 2719227364Sadrian * 2720227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2721227364Sadrian * else to put it just yet. 2722227364Sadrian * 2723227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2724227364Sadrian */ 2725227364Sadrianvoid 2726227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2727227364Sadrian{ 2728227364Sadrian int i, j; 2729227364Sadrian struct ath_tid *atid; 2730227364Sadrian 2731227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2732227364Sadrian atid = &an->an_tid[i]; 2733240639Sadrian 2734240639Sadrian /* XXX now with this bzer(), is the field 0'ing needed? */ 2735240639Sadrian bzero(atid, sizeof(*atid)); 2736240639Sadrian 2737227364Sadrian TAILQ_INIT(&atid->axq_q); 2738240639Sadrian TAILQ_INIT(&atid->filtq.axq_q); 2739227364Sadrian atid->tid = i; 2740227364Sadrian atid->an = an; 2741227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2742227364Sadrian atid->tx_buf[j] = NULL; 2743227364Sadrian atid->baw_head = atid->baw_tail = 0; 2744227364Sadrian atid->paused = 0; 2745227364Sadrian atid->sched = 0; 2746227364Sadrian atid->hwq_depth = 0; 2747227364Sadrian atid->cleanup_inprogress = 0; 2748240639Sadrian atid->clrdmask = 1; /* Always start by setting this bit */ 2749227364Sadrian if (i == IEEE80211_NONQOS_TID) 2750227364Sadrian atid->ac = WME_AC_BE; 2751227364Sadrian else 2752227364Sadrian atid->ac = TID_TO_WME_AC(i); 2753227364Sadrian } 2754227364Sadrian} 2755227364Sadrian 2756227364Sadrian/* 2757227364Sadrian * Pause the current TID. This stops packets from being transmitted 2758227364Sadrian * on it. 2759227364Sadrian * 2760227364Sadrian * Since this is also called from upper layers as well as the driver, 2761227364Sadrian * it will get the TID lock. 2762227364Sadrian */ 2763227364Sadrianstatic void 2764227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2765227364Sadrian{ 2766233908Sadrian 2767233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2768227364Sadrian tid->paused++; 2769227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2770227364Sadrian __func__, tid->paused); 2771227364Sadrian} 2772227364Sadrian 2773227364Sadrian/* 2774227364Sadrian * Unpause the current TID, and schedule it if needed. 2775227364Sadrian */ 2776227364Sadrianstatic void 2777227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2778227364Sadrian{ 2779227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2780227364Sadrian 2781227364Sadrian tid->paused--; 2782227364Sadrian 2783227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2784227364Sadrian __func__, tid->paused); 2785227364Sadrian 2786227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2787227364Sadrian return; 2788227364Sadrian } 2789227364Sadrian 2790240639Sadrian /* XXX isfiltered shouldn't ever be 0 at this point */ 2791240639Sadrian if (tid->isfiltered == 1) { 2792240639Sadrian device_printf(sc->sc_dev, "%s: filtered?!\n", __func__); 2793240639Sadrian return; 2794240639Sadrian } 2795240639Sadrian 2796227364Sadrian ath_tx_tid_sched(sc, tid); 2797227364Sadrian /* Punt some frames to the hardware if needed */ 2798233673Sadrian //ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2799233673Sadrian taskqueue_enqueue(sc->sc_tq, &sc->sc_txqtask); 2800227364Sadrian} 2801227364Sadrian 2802227364Sadrian/* 2803240639Sadrian * Add the given ath_buf to the TID filtered frame list. 2804240639Sadrian * This requires the TID be filtered. 2805240639Sadrian */ 2806240639Sadrianstatic void 2807240639Sadrianath_tx_tid_filt_addbuf(struct ath_softc *sc, struct ath_tid *tid, 2808240639Sadrian struct ath_buf *bf) 2809240639Sadrian{ 2810240639Sadrian 2811240639Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2812240639Sadrian if (! tid->isfiltered) 2813240639Sadrian device_printf(sc->sc_dev, "%s: not filtered?!\n", __func__); 2814240639Sadrian 2815240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: bf=%p\n", __func__, bf); 2816240639Sadrian 2817240639Sadrian /* Set the retry bit and bump the retry counter */ 2818240639Sadrian ath_tx_set_retry(sc, bf); 2819240639Sadrian sc->sc_stats.ast_tx_swfiltered++; 2820240639Sadrian 2821240639Sadrian ATH_TXQ_INSERT_TAIL(&tid->filtq, bf, bf_list); 2822240639Sadrian} 2823240639Sadrian 2824240639Sadrian/* 2825240639Sadrian * Handle a completed filtered frame from the given TID. 2826240639Sadrian * This just enables/pauses the filtered frame state if required 2827240639Sadrian * and appends the filtered frame to the filtered queue. 2828240639Sadrian */ 2829240639Sadrianstatic void 2830240639Sadrianath_tx_tid_filt_comp_buf(struct ath_softc *sc, struct ath_tid *tid, 2831240639Sadrian struct ath_buf *bf) 2832240639Sadrian{ 2833240639Sadrian 2834240639Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2835240639Sadrian 2836240639Sadrian if (! tid->isfiltered) { 2837240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: filter transition\n", 2838240639Sadrian __func__); 2839240639Sadrian tid->isfiltered = 1; 2840240639Sadrian ath_tx_tid_pause(sc, tid); 2841240639Sadrian } 2842240639Sadrian 2843240639Sadrian /* Add the frame to the filter queue */ 2844240639Sadrian ath_tx_tid_filt_addbuf(sc, tid, bf); 2845240639Sadrian} 2846240639Sadrian 2847240639Sadrian/* 2848240639Sadrian * Complete the filtered frame TX completion. 2849240639Sadrian * 2850240639Sadrian * If there are no more frames in the hardware queue, unpause/unfilter 2851240639Sadrian * the TID if applicable. Otherwise we will wait for a node PS transition 2852240639Sadrian * to unfilter. 2853240639Sadrian */ 2854240639Sadrianstatic void 2855240639Sadrianath_tx_tid_filt_comp_complete(struct ath_softc *sc, struct ath_tid *tid) 2856240639Sadrian{ 2857240639Sadrian struct ath_buf *bf; 2858240639Sadrian 2859240639Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2860240639Sadrian 2861240639Sadrian if (tid->hwq_depth != 0) 2862240639Sadrian return; 2863240639Sadrian 2864240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: hwq=0, transition back\n", 2865240639Sadrian __func__); 2866240639Sadrian tid->isfiltered = 0; 2867240639Sadrian tid->clrdmask = 1; 2868240639Sadrian 2869240639Sadrian /* XXX this is really quite inefficient */ 2870240639Sadrian while ((bf = TAILQ_LAST(&tid->filtq.axq_q, ath_bufhead_s)) != NULL) { 2871240639Sadrian ATH_TXQ_REMOVE(&tid->filtq, bf, bf_list); 2872240639Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2873240639Sadrian } 2874240639Sadrian 2875240639Sadrian ath_tx_tid_resume(sc, tid); 2876240639Sadrian} 2877240639Sadrian 2878240639Sadrian/* 2879240639Sadrian * Called when a single (aggregate or otherwise) frame is completed. 2880240639Sadrian * 2881240639Sadrian * Returns 1 if the buffer could be added to the filtered list 2882240639Sadrian * (cloned or otherwise), 0 if the buffer couldn't be added to the 2883240639Sadrian * filtered list (failed clone; expired retry) and the caller should 2884240639Sadrian * free it and handle it like a failure (eg by sending a BAR.) 2885240639Sadrian */ 2886240639Sadrianstatic int 2887240639Sadrianath_tx_tid_filt_comp_single(struct ath_softc *sc, struct ath_tid *tid, 2888240639Sadrian struct ath_buf *bf) 2889240639Sadrian{ 2890240639Sadrian struct ath_buf *nbf; 2891240639Sadrian int retval; 2892240639Sadrian 2893240639Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2894240639Sadrian 2895240639Sadrian /* 2896240639Sadrian * Don't allow a filtered frame to live forever. 2897240639Sadrian */ 2898240639Sadrian if (bf->bf_state.bfs_retries > SWMAX_RETRIES) { 2899240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 2900240639Sadrian "%s: bf=%p, seqno=%d, exceeded retries\n", 2901240639Sadrian __func__, 2902240639Sadrian bf, 2903240639Sadrian bf->bf_state.bfs_seqno); 2904240639Sadrian return (0); 2905240639Sadrian } 2906240639Sadrian 2907240639Sadrian /* 2908240639Sadrian * A busy buffer can't be added to the retry list. 2909240639Sadrian * It needs to be cloned. 2910240639Sadrian */ 2911240639Sadrian if (bf->bf_flags & ATH_BUF_BUSY) { 2912240639Sadrian nbf = ath_tx_retry_clone(sc, tid->an, tid, bf); 2913240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 2914240639Sadrian "%s: busy buffer clone: %p -> %p\n", 2915240639Sadrian __func__, bf, nbf); 2916240639Sadrian } else { 2917240639Sadrian nbf = bf; 2918240639Sadrian } 2919240639Sadrian 2920240639Sadrian if (nbf == NULL) { 2921240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 2922240639Sadrian "%s: busy buffer couldn't be cloned (%p)!\n", 2923240639Sadrian __func__, bf); 2924240639Sadrian retval = 1; 2925240639Sadrian } else { 2926240639Sadrian ath_tx_tid_filt_comp_buf(sc, tid, nbf); 2927240639Sadrian retval = 0; 2928240639Sadrian } 2929240639Sadrian ath_tx_tid_filt_comp_complete(sc, tid); 2930240639Sadrian 2931240639Sadrian return (retval); 2932240639Sadrian} 2933240639Sadrian 2934240639Sadrianstatic void 2935240639Sadrianath_tx_tid_filt_comp_aggr(struct ath_softc *sc, struct ath_tid *tid, 2936240639Sadrian struct ath_buf *bf_first, ath_bufhead *bf_q) 2937240639Sadrian{ 2938240639Sadrian struct ath_buf *bf, *bf_next, *nbf; 2939240639Sadrian 2940240639Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2941240639Sadrian 2942240639Sadrian bf = bf_first; 2943240639Sadrian while (bf) { 2944240639Sadrian bf_next = bf->bf_next; 2945240639Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 2946240639Sadrian 2947240639Sadrian /* 2948240639Sadrian * Don't allow a filtered frame to live forever. 2949240639Sadrian */ 2950240639Sadrian if (bf->bf_state.bfs_retries > SWMAX_RETRIES) { 2951240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 2952240639Sadrian "%s: bf=%p, seqno=%d, exceeded retries\n", 2953240639Sadrian __func__, 2954240639Sadrian bf, 2955240639Sadrian bf->bf_state.bfs_seqno); 2956240639Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 2957240639Sadrian goto next; 2958240639Sadrian } 2959240639Sadrian 2960240639Sadrian if (bf->bf_flags & ATH_BUF_BUSY) { 2961240639Sadrian nbf = ath_tx_retry_clone(sc, tid->an, tid, bf); 2962240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 2963240639Sadrian "%s: busy buffer cloned: %p -> %p", 2964240639Sadrian __func__, bf, nbf); 2965240639Sadrian } else { 2966240639Sadrian nbf = bf; 2967240639Sadrian } 2968240639Sadrian 2969240639Sadrian /* 2970240639Sadrian * If the buffer couldn't be cloned, add it to bf_q; 2971240639Sadrian * the caller will free the buffer(s) as required. 2972240639Sadrian */ 2973240639Sadrian if (nbf == NULL) { 2974240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 2975240639Sadrian "%s: buffer couldn't be cloned! (%p)\n", 2976240639Sadrian __func__, bf); 2977240639Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 2978240639Sadrian } else { 2979240639Sadrian ath_tx_tid_filt_comp_buf(sc, tid, nbf); 2980240639Sadrian } 2981240639Sadriannext: 2982240639Sadrian bf = bf_next; 2983240639Sadrian } 2984240639Sadrian 2985240639Sadrian ath_tx_tid_filt_comp_complete(sc, tid); 2986240639Sadrian} 2987240639Sadrian 2988240639Sadrian/* 2989233908Sadrian * Suspend the queue because we need to TX a BAR. 2990233908Sadrian */ 2991233908Sadrianstatic void 2992233908Sadrianath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid) 2993233908Sadrian{ 2994233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2995233908Sadrian 2996235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2997235676Sadrian "%s: tid=%p, bar_wait=%d, bar_tx=%d, called\n", 2998233908Sadrian __func__, 2999235676Sadrian tid, 3000235676Sadrian tid->bar_wait, 3001235676Sadrian tid->bar_tx); 3002233908Sadrian 3003233908Sadrian /* We shouldn't be called when bar_tx is 1 */ 3004233908Sadrian if (tid->bar_tx) { 3005233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx is 1?!\n", 3006233908Sadrian __func__); 3007233908Sadrian } 3008233908Sadrian 3009233908Sadrian /* If we've already been called, just be patient. */ 3010233908Sadrian if (tid->bar_wait) 3011233908Sadrian return; 3012233908Sadrian 3013233908Sadrian /* Wait! */ 3014233908Sadrian tid->bar_wait = 1; 3015233908Sadrian 3016233908Sadrian /* Only one pause, no matter how many frames fail */ 3017233908Sadrian ath_tx_tid_pause(sc, tid); 3018233908Sadrian} 3019233908Sadrian 3020233908Sadrian/* 3021233908Sadrian * We've finished with BAR handling - either we succeeded or 3022233908Sadrian * failed. Either way, unsuspend TX. 3023233908Sadrian */ 3024233908Sadrianstatic void 3025233908Sadrianath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid) 3026233908Sadrian{ 3027233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 3028233908Sadrian 3029235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3030233908Sadrian "%s: tid=%p, called\n", 3031233908Sadrian __func__, 3032233908Sadrian tid); 3033233908Sadrian 3034233908Sadrian if (tid->bar_tx == 0 || tid->bar_wait == 0) { 3035233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx=%d, bar_wait=%d: ?\n", 3036233908Sadrian __func__, tid->bar_tx, tid->bar_wait); 3037233908Sadrian } 3038233908Sadrian 3039233908Sadrian tid->bar_tx = tid->bar_wait = 0; 3040233908Sadrian ath_tx_tid_resume(sc, tid); 3041233908Sadrian} 3042233908Sadrian 3043233908Sadrian/* 3044233908Sadrian * Return whether we're ready to TX a BAR frame. 3045233908Sadrian * 3046233908Sadrian * Requires the TID lock be held. 3047233908Sadrian */ 3048233908Sadrianstatic int 3049233908Sadrianath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid) 3050233908Sadrian{ 3051233908Sadrian 3052233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 3053233908Sadrian 3054233908Sadrian if (tid->bar_wait == 0 || tid->hwq_depth > 0) 3055233908Sadrian return (0); 3056233908Sadrian 3057235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, "%s: tid=%p (%d), bar ready\n", 3058235491Sadrian __func__, tid, tid->tid); 3059235491Sadrian 3060233908Sadrian return (1); 3061233908Sadrian} 3062233908Sadrian 3063233908Sadrian/* 3064233908Sadrian * Check whether the current TID is ready to have a BAR 3065233908Sadrian * TXed and if so, do the TX. 3066233908Sadrian * 3067233908Sadrian * Since the TID/TXQ lock can't be held during a call to 3068233908Sadrian * ieee80211_send_bar(), we have to do the dirty thing of unlocking it, 3069233908Sadrian * sending the BAR and locking it again. 3070233908Sadrian * 3071233908Sadrian * Eventually, the code to send the BAR should be broken out 3072233908Sadrian * from this routine so the lock doesn't have to be reacquired 3073233908Sadrian * just to be immediately dropped by the caller. 3074233908Sadrian */ 3075233908Sadrianstatic void 3076233908Sadrianath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid) 3077233908Sadrian{ 3078233908Sadrian struct ieee80211_tx_ampdu *tap; 3079233908Sadrian 3080233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 3081233908Sadrian 3082235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3083233908Sadrian "%s: tid=%p, called\n", 3084233908Sadrian __func__, 3085233908Sadrian tid); 3086233908Sadrian 3087233908Sadrian tap = ath_tx_get_tx_tid(tid->an, tid->tid); 3088233908Sadrian 3089233908Sadrian /* 3090233908Sadrian * This is an error condition! 3091233908Sadrian */ 3092233908Sadrian if (tid->bar_wait == 0 || tid->bar_tx == 1) { 3093233908Sadrian device_printf(sc->sc_dev, 3094233908Sadrian "%s: tid=%p, bar_tx=%d, bar_wait=%d: ?\n", 3095233908Sadrian __func__, 3096233908Sadrian tid, 3097233908Sadrian tid->bar_tx, 3098233908Sadrian tid->bar_wait); 3099233908Sadrian return; 3100233908Sadrian } 3101233908Sadrian 3102233908Sadrian /* Don't do anything if we still have pending frames */ 3103233908Sadrian if (tid->hwq_depth > 0) { 3104235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3105233908Sadrian "%s: tid=%p, hwq_depth=%d, waiting\n", 3106233908Sadrian __func__, 3107233908Sadrian tid, 3108233908Sadrian tid->hwq_depth); 3109233908Sadrian return; 3110233908Sadrian } 3111233908Sadrian 3112233908Sadrian /* We're now about to TX */ 3113233908Sadrian tid->bar_tx = 1; 3114233908Sadrian 3115233908Sadrian /* 3116233908Sadrian * Calculate new BAW left edge, now that all frames have either 3117233908Sadrian * succeeded or failed. 3118233908Sadrian * 3119233908Sadrian * XXX verify this is _actually_ the valid value to begin at! 3120233908Sadrian */ 3121235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3122233908Sadrian "%s: tid=%p, new BAW left edge=%d\n", 3123233908Sadrian __func__, 3124233908Sadrian tid, 3125233908Sadrian tap->txa_start); 3126233908Sadrian 3127233908Sadrian /* Try sending the BAR frame */ 3128233908Sadrian /* We can't hold the lock here! */ 3129233908Sadrian 3130233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3131233908Sadrian if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) { 3132233908Sadrian /* Success? Now we wait for notification that it's done */ 3133233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3134233908Sadrian return; 3135233908Sadrian } 3136233908Sadrian 3137233908Sadrian /* Failure? For now, warn loudly and continue */ 3138233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3139233908Sadrian device_printf(sc->sc_dev, "%s: tid=%p, failed to TX BAR, continue!\n", 3140233908Sadrian __func__, tid); 3141233908Sadrian ath_tx_tid_bar_unsuspend(sc, tid); 3142233908Sadrian} 3143233908Sadrian 3144240639Sadrianstatic void 3145240639Sadrianath_tx_tid_drain_pkt(struct ath_softc *sc, struct ath_node *an, 3146240639Sadrian struct ath_tid *tid, ath_bufhead *bf_cq, struct ath_buf *bf) 3147240639Sadrian{ 3148233908Sadrian 3149240639Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 3150240639Sadrian 3151240639Sadrian /* 3152240639Sadrian * If the current TID is running AMPDU, update 3153240639Sadrian * the BAW. 3154240639Sadrian */ 3155240639Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 3156240639Sadrian bf->bf_state.bfs_dobaw) { 3157240639Sadrian /* 3158240639Sadrian * Only remove the frame from the BAW if it's 3159240639Sadrian * been transmitted at least once; this means 3160240639Sadrian * the frame was in the BAW to begin with. 3161240639Sadrian */ 3162240639Sadrian if (bf->bf_state.bfs_retries > 0) { 3163240639Sadrian ath_tx_update_baw(sc, an, tid, bf); 3164240639Sadrian bf->bf_state.bfs_dobaw = 0; 3165240639Sadrian } 3166240639Sadrian /* 3167240639Sadrian * This has become a non-fatal error now 3168240639Sadrian */ 3169240639Sadrian if (! bf->bf_state.bfs_addedbaw) 3170240639Sadrian device_printf(sc->sc_dev, 3171240639Sadrian "%s: wasn't added: seqno %d\n", 3172240639Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3173240639Sadrian } 3174240639Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 3175240639Sadrian} 3176240639Sadrian 3177240639Sadrianstatic void 3178240639Sadrianath_tx_tid_drain_print(struct ath_softc *sc, struct ath_node *an, 3179240639Sadrian struct ath_tid *tid, struct ath_buf *bf) 3180240639Sadrian{ 3181240639Sadrian struct ieee80211_node *ni = &an->an_node; 3182240639Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3183240639Sadrian struct ieee80211_tx_ampdu *tap; 3184240639Sadrian 3185240639Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3186240639Sadrian 3187240639Sadrian device_printf(sc->sc_dev, 3188240639Sadrian "%s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 3189240639Sadrian "seqno=%d, retry=%d\n", 3190240639Sadrian __func__, ni, bf, 3191240639Sadrian bf->bf_state.bfs_addedbaw, 3192240639Sadrian bf->bf_state.bfs_dobaw, 3193240639Sadrian SEQNO(bf->bf_state.bfs_seqno), 3194240639Sadrian bf->bf_state.bfs_retries); 3195240639Sadrian device_printf(sc->sc_dev, 3196240639Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d, isfiltered=%d\n", 3197240639Sadrian __func__, ni, bf, 3198240639Sadrian tid->axq_depth, 3199240639Sadrian tid->hwq_depth, 3200240639Sadrian tid->bar_wait, 3201240639Sadrian tid->isfiltered); 3202240639Sadrian device_printf(sc->sc_dev, 3203240639Sadrian "%s: node %p: tid %d: txq_depth=%d, " 3204240639Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 3205240639Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, " 3206240639Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 3207240639Sadrian __func__, ni, tid->tid, txq->axq_depth, 3208240639Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 3209240639Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 3210240639Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 3211240639Sadrian ni->ni_txseqs[tid->tid]); 3212240639Sadrian 3213240639Sadrian /* XXX Dump the frame, see what it is? */ 3214240639Sadrian ieee80211_dump_pkt(ni->ni_ic, 3215240639Sadrian mtod(bf->bf_m, const uint8_t *), 3216240639Sadrian bf->bf_m->m_len, 0, -1); 3217240639Sadrian} 3218240639Sadrian 3219233908Sadrian/* 3220227364Sadrian * Free any packets currently pending in the software TX queue. 3221227364Sadrian * 3222227364Sadrian * This will be called when a node is being deleted. 3223227364Sadrian * 3224227364Sadrian * It can also be called on an active node during an interface 3225227364Sadrian * reset or state transition. 3226227364Sadrian * 3227227364Sadrian * (From Linux/reference): 3228227364Sadrian * 3229227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 3230227364Sadrian * sequence number(s) without setting the retry bit. The 3231227364Sadrian * alternative is to give up on these and BAR the receiver's window 3232227364Sadrian * forward. 3233227364Sadrian */ 3234227364Sadrianstatic void 3235229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 3236229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 3237227364Sadrian{ 3238227364Sadrian struct ath_buf *bf; 3239227364Sadrian struct ieee80211_tx_ampdu *tap; 3240227364Sadrian struct ieee80211_node *ni = &an->an_node; 3241240639Sadrian int t; 3242227364Sadrian 3243227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3244227364Sadrian 3245240639Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 3246227364Sadrian 3247227364Sadrian /* Walk the queue, free frames */ 3248240639Sadrian t = 0; 3249227364Sadrian for (;;) { 3250227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3251227364Sadrian if (bf == NULL) { 3252227364Sadrian break; 3253227364Sadrian } 3254227364Sadrian 3255227364Sadrian if (t == 0) { 3256240639Sadrian ath_tx_tid_drain_print(sc, an, tid, bf); 3257240639Sadrian t = 1; 3258240639Sadrian } 3259229165Sadrian 3260240639Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3261240639Sadrian ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf); 3262240639Sadrian } 3263229165Sadrian 3264240639Sadrian /* And now, drain the filtered frame queue */ 3265240639Sadrian t = 0; 3266240639Sadrian for (;;) { 3267240639Sadrian bf = TAILQ_FIRST(&tid->filtq.axq_q); 3268240639Sadrian if (bf == NULL) 3269240639Sadrian break; 3270240639Sadrian 3271240639Sadrian if (t == 0) { 3272240639Sadrian ath_tx_tid_drain_print(sc, an, tid, bf); 3273233897Sadrian t = 1; 3274227364Sadrian } 3275227364Sadrian 3276240639Sadrian ATH_TXQ_REMOVE(&tid->filtq, bf, bf_list); 3277240639Sadrian ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf); 3278227364Sadrian } 3279227364Sadrian 3280227364Sadrian /* 3281227364Sadrian * Now that it's completed, grab the TID lock and update 3282227364Sadrian * the sequence number and BAW window. 3283227364Sadrian * Because sequence numbers have been assigned to frames 3284227364Sadrian * that haven't been sent yet, it's entirely possible 3285227364Sadrian * we'll be called with some pending frames that have not 3286227364Sadrian * been transmitted. 3287227364Sadrian * 3288227364Sadrian * The cleaner solution is to do the sequence number allocation 3289227364Sadrian * when the packet is first transmitted - and thus the "retries" 3290227364Sadrian * check above would be enough to update the BAW/seqno. 3291227364Sadrian */ 3292227364Sadrian 3293227364Sadrian /* But don't do it for non-QoS TIDs */ 3294227364Sadrian if (tap) { 3295227364Sadrian#if 0 3296227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3297227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 3298227364Sadrian __func__, an, tid->tid, tap->txa_start); 3299227364Sadrian#endif 3300227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 3301227364Sadrian tid->baw_tail = tid->baw_head; 3302227364Sadrian } 3303227364Sadrian} 3304227364Sadrian 3305227364Sadrian/* 3306227364Sadrian * Flush all software queued packets for the given node. 3307227364Sadrian * 3308227364Sadrian * This occurs when a completion handler frees the last buffer 3309227364Sadrian * for a node, and the node is thus freed. This causes the node 3310227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 3311227364Sadrian */ 3312227364Sadrianvoid 3313227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 3314227364Sadrian{ 3315227364Sadrian int tid; 3316227364Sadrian ath_bufhead bf_cq; 3317227364Sadrian struct ath_buf *bf; 3318227364Sadrian 3319227364Sadrian TAILQ_INIT(&bf_cq); 3320227364Sadrian 3321227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 3322227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3323227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 3324227364Sadrian 3325227364Sadrian /* Remove this tid from the list of active tids */ 3326227364Sadrian ATH_TXQ_LOCK(txq); 3327227364Sadrian ath_tx_tid_unsched(sc, atid); 3328227364Sadrian 3329227364Sadrian /* Free packets */ 3330227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 3331227364Sadrian ATH_TXQ_UNLOCK(txq); 3332227364Sadrian } 3333227364Sadrian 3334227364Sadrian /* Handle completed frames */ 3335227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3336227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3337227364Sadrian ath_tx_default_comp(sc, bf, 0); 3338227364Sadrian } 3339227364Sadrian} 3340227364Sadrian 3341227364Sadrian/* 3342227364Sadrian * Drain all the software TXQs currently with traffic queued. 3343227364Sadrian */ 3344227364Sadrianvoid 3345227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 3346227364Sadrian{ 3347227364Sadrian struct ath_tid *tid; 3348227364Sadrian ath_bufhead bf_cq; 3349227364Sadrian struct ath_buf *bf; 3350227364Sadrian 3351227364Sadrian TAILQ_INIT(&bf_cq); 3352227364Sadrian ATH_TXQ_LOCK(txq); 3353227364Sadrian 3354227364Sadrian /* 3355227364Sadrian * Iterate over all active tids for the given txq, 3356227364Sadrian * flushing and unsched'ing them 3357227364Sadrian */ 3358227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 3359227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 3360227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 3361227364Sadrian ath_tx_tid_unsched(sc, tid); 3362227364Sadrian } 3363227364Sadrian 3364227364Sadrian ATH_TXQ_UNLOCK(txq); 3365227364Sadrian 3366227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3367227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3368227364Sadrian ath_tx_default_comp(sc, bf, 0); 3369227364Sadrian } 3370227364Sadrian} 3371227364Sadrian 3372227364Sadrian/* 3373227364Sadrian * Handle completion of non-aggregate session frames. 3374227364Sadrian */ 3375227364Sadrianvoid 3376227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3377227364Sadrian{ 3378227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3379227364Sadrian struct ath_node *an = ATH_NODE(ni); 3380227364Sadrian int tid = bf->bf_state.bfs_tid; 3381227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3382227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3383227364Sadrian 3384227364Sadrian /* The TID state is protected behind the TXQ lock */ 3385227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3386227364Sadrian 3387227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 3388227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 3389227364Sadrian 3390227364Sadrian atid->hwq_depth--; 3391240639Sadrian 3392240639Sadrian if (atid->isfiltered) 3393240639Sadrian device_printf(sc->sc_dev, "%s: isfiltered=1, normal_comp?\n", 3394240639Sadrian __func__); 3395240639Sadrian 3396227364Sadrian if (atid->hwq_depth < 0) 3397227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3398227364Sadrian __func__, atid->hwq_depth); 3399240639Sadrian 3400240639Sadrian /* 3401240639Sadrian * If the queue is filtered, potentially mark it as complete 3402240639Sadrian * and reschedule it as needed. 3403240639Sadrian * 3404240639Sadrian * This is required as there may be a subsequent TX descriptor 3405240639Sadrian * for this end-node that has CLRDMASK set, so it's quite possible 3406240639Sadrian * that a filtered frame will be followed by a non-filtered 3407240639Sadrian * (complete or otherwise) frame. 3408240639Sadrian * 3409240639Sadrian * XXX should we do this before we complete the frame? 3410240639Sadrian */ 3411240639Sadrian if (atid->isfiltered) 3412240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 3413240639Sadrian 3414227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3415227364Sadrian 3416227364Sadrian /* 3417227364Sadrian * punt to rate control if we're not being cleaned up 3418227364Sadrian * during a hw queue drain and the frame wanted an ACK. 3419227364Sadrian */ 3420233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3421227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3422227364Sadrian ts, bf->bf_state.bfs_pktlen, 3423227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3424227364Sadrian 3425227364Sadrian ath_tx_default_comp(sc, bf, fail); 3426227364Sadrian} 3427227364Sadrian 3428227364Sadrian/* 3429227364Sadrian * Handle cleanup of aggregate session packets that aren't 3430227364Sadrian * an A-MPDU. 3431227364Sadrian * 3432227364Sadrian * There's no need to update the BAW here - the session is being 3433227364Sadrian * torn down. 3434227364Sadrian */ 3435227364Sadrianstatic void 3436227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3437227364Sadrian{ 3438227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3439227364Sadrian struct ath_node *an = ATH_NODE(ni); 3440227364Sadrian int tid = bf->bf_state.bfs_tid; 3441227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3442227364Sadrian 3443227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 3444227364Sadrian __func__, tid, atid->incomp); 3445227364Sadrian 3446227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3447227364Sadrian atid->incomp--; 3448227364Sadrian if (atid->incomp == 0) { 3449227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3450227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3451227364Sadrian __func__, tid); 3452227364Sadrian atid->cleanup_inprogress = 0; 3453227364Sadrian ath_tx_tid_resume(sc, atid); 3454227364Sadrian } 3455227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3456227364Sadrian 3457227364Sadrian ath_tx_default_comp(sc, bf, 0); 3458227364Sadrian} 3459227364Sadrian 3460227364Sadrian/* 3461227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 3462227364Sadrian * unaggregated. 3463227364Sadrian * 3464227364Sadrian * - Discard all retry frames from the s/w queue. 3465227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 3466227364Sadrian * - Count the number of unacked frames, and let transmit completion 3467227364Sadrian * handle it later. 3468227364Sadrian * 3469227364Sadrian * The caller is responsible for pausing the TID. 3470227364Sadrian */ 3471227364Sadrianstatic void 3472235749Sadrianath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 3473227364Sadrian{ 3474227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3475227364Sadrian struct ieee80211_tx_ampdu *tap; 3476227364Sadrian struct ath_buf *bf, *bf_next; 3477227364Sadrian ath_bufhead bf_cq; 3478227364Sadrian 3479235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 3480227364Sadrian "%s: TID %d: called\n", __func__, tid); 3481227364Sadrian 3482227364Sadrian TAILQ_INIT(&bf_cq); 3483227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3484227364Sadrian 3485227364Sadrian /* 3486240639Sadrian * Move the filtered frames to the TX queue, before 3487240639Sadrian * we run off and discard/process things. 3488240639Sadrian */ 3489240639Sadrian /* XXX this is really quite inefficient */ 3490240639Sadrian while ((bf = TAILQ_LAST(&atid->filtq.axq_q, ath_bufhead_s)) != NULL) { 3491240639Sadrian ATH_TXQ_REMOVE(&atid->filtq, bf, bf_list); 3492240639Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3493240639Sadrian } 3494240639Sadrian 3495240639Sadrian /* 3496227364Sadrian * Update the frames in the software TX queue: 3497227364Sadrian * 3498227364Sadrian * + Discard retry frames in the queue 3499227364Sadrian * + Fix the completion function to be non-aggregate 3500227364Sadrian */ 3501227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 3502227364Sadrian while (bf) { 3503227364Sadrian if (bf->bf_state.bfs_isretried) { 3504227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 3505227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 3506227364Sadrian atid->axq_depth--; 3507227364Sadrian if (bf->bf_state.bfs_dobaw) { 3508227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3509227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3510227364Sadrian device_printf(sc->sc_dev, 3511227364Sadrian "%s: wasn't added: seqno %d\n", 3512229949Sadrian __func__, 3513229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3514227364Sadrian } 3515227364Sadrian bf->bf_state.bfs_dobaw = 0; 3516227364Sadrian /* 3517227364Sadrian * Call the default completion handler with "fail" just 3518227364Sadrian * so upper levels are suitably notified about this. 3519227364Sadrian */ 3520227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3521227364Sadrian bf = bf_next; 3522227364Sadrian continue; 3523227364Sadrian } 3524227364Sadrian /* Give these the default completion handler */ 3525227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3526227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 3527227364Sadrian } 3528227364Sadrian 3529227364Sadrian /* The caller is required to pause the TID */ 3530227364Sadrian#if 0 3531227364Sadrian /* Pause the TID */ 3532227364Sadrian ath_tx_tid_pause(sc, atid); 3533227364Sadrian#endif 3534227364Sadrian 3535227364Sadrian /* 3536227364Sadrian * Calculate what hardware-queued frames exist based 3537227364Sadrian * on the current BAW size. Ie, what frames have been 3538227364Sadrian * added to the TX hardware queue for this TID but 3539227364Sadrian * not yet ACKed. 3540227364Sadrian */ 3541227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3542227364Sadrian /* Need the lock - fiddling with BAW */ 3543227364Sadrian while (atid->baw_head != atid->baw_tail) { 3544227364Sadrian if (atid->tx_buf[atid->baw_head]) { 3545227364Sadrian atid->incomp++; 3546227364Sadrian atid->cleanup_inprogress = 1; 3547227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 3548227364Sadrian } 3549227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 3550227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 3551227364Sadrian } 3552227364Sadrian 3553227364Sadrian /* 3554227364Sadrian * If cleanup is required, defer TID scheduling 3555227364Sadrian * until all the HW queued packets have been 3556227364Sadrian * sent. 3557227364Sadrian */ 3558227364Sadrian if (! atid->cleanup_inprogress) 3559227364Sadrian ath_tx_tid_resume(sc, atid); 3560227364Sadrian 3561227364Sadrian if (atid->cleanup_inprogress) 3562227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3563227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 3564227364Sadrian __func__, tid, atid->incomp); 3565227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3566227364Sadrian 3567227364Sadrian /* Handle completing frames and fail them */ 3568227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3569227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3570227364Sadrian ath_tx_default_comp(sc, bf, 1); 3571227364Sadrian } 3572227364Sadrian} 3573227364Sadrian 3574227364Sadrianstatic struct ath_buf * 3575227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3576227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3577227364Sadrian{ 3578227364Sadrian struct ath_buf *nbf; 3579227364Sadrian int error; 3580227364Sadrian 3581227364Sadrian nbf = ath_buf_clone(sc, bf); 3582227364Sadrian 3583227364Sadrian#if 0 3584227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3585227364Sadrian __func__); 3586227364Sadrian#endif 3587227364Sadrian 3588227364Sadrian if (nbf == NULL) { 3589227364Sadrian /* Failed to clone */ 3590227364Sadrian device_printf(sc->sc_dev, 3591227364Sadrian "%s: failed to clone a busy buffer\n", 3592227364Sadrian __func__); 3593227364Sadrian return NULL; 3594227364Sadrian } 3595227364Sadrian 3596227364Sadrian /* Setup the dma for the new buffer */ 3597227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3598227364Sadrian if (error != 0) { 3599227364Sadrian device_printf(sc->sc_dev, 3600227364Sadrian "%s: failed to setup dma for clone\n", 3601227364Sadrian __func__); 3602227364Sadrian /* 3603227364Sadrian * Put this at the head of the list, not tail; 3604227364Sadrian * that way it doesn't interfere with the 3605227364Sadrian * busy buffer logic (which uses the tail of 3606227364Sadrian * the list.) 3607227364Sadrian */ 3608227364Sadrian ATH_TXBUF_LOCK(sc); 3609236994Sadrian ath_returnbuf_head(sc, nbf); 3610227364Sadrian ATH_TXBUF_UNLOCK(sc); 3611227364Sadrian return NULL; 3612227364Sadrian } 3613227364Sadrian 3614227398Sadrian /* Update BAW if required, before we free the original buf */ 3615227398Sadrian if (bf->bf_state.bfs_dobaw) 3616227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3617227398Sadrian 3618227364Sadrian /* Free current buffer; return the older buffer */ 3619227364Sadrian bf->bf_m = NULL; 3620227364Sadrian bf->bf_node = NULL; 3621227364Sadrian ath_freebuf(sc, bf); 3622240639Sadrian 3623227364Sadrian return nbf; 3624227364Sadrian} 3625227364Sadrian 3626227364Sadrian/* 3627227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3628227364Sadrian * session. 3629227364Sadrian * 3630227364Sadrian * If too many retries occur, pause the TID, wait for 3631227364Sadrian * any further retransmits (as there's no reason why 3632227364Sadrian * non-aggregate frames in an aggregate session are 3633227364Sadrian * transmitted in-order; they just have to be in-BAW) 3634227364Sadrian * and then queue a BAR. 3635227364Sadrian */ 3636227364Sadrianstatic void 3637227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3638227364Sadrian{ 3639227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3640227364Sadrian struct ath_node *an = ATH_NODE(ni); 3641227364Sadrian int tid = bf->bf_state.bfs_tid; 3642227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3643227364Sadrian struct ieee80211_tx_ampdu *tap; 3644227364Sadrian 3645227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3646227364Sadrian 3647227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3648227364Sadrian 3649227364Sadrian /* 3650227364Sadrian * If the buffer is marked as busy, we can't directly 3651227364Sadrian * reuse it. Instead, try to clone the buffer. 3652227364Sadrian * If the clone is successful, recycle the old buffer. 3653227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3654227364Sadrian * to force the next bit of code to free the buffer 3655227364Sadrian * for us. 3656227364Sadrian */ 3657227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3658227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3659227364Sadrian struct ath_buf *nbf; 3660227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3661227364Sadrian if (nbf) 3662227364Sadrian /* bf has been freed at this point */ 3663227364Sadrian bf = nbf; 3664227364Sadrian else 3665227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3666227364Sadrian } 3667227364Sadrian 3668227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3669227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3670227364Sadrian "%s: exceeded retries; seqno %d\n", 3671227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3672227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3673227364Sadrian 3674227364Sadrian /* Update BAW anyway */ 3675227364Sadrian if (bf->bf_state.bfs_dobaw) { 3676227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3677227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3678227364Sadrian device_printf(sc->sc_dev, 3679227364Sadrian "%s: wasn't added: seqno %d\n", 3680227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3681227364Sadrian } 3682227364Sadrian bf->bf_state.bfs_dobaw = 0; 3683227364Sadrian 3684233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3685233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3686227364Sadrian 3687233908Sadrian /* Send the BAR if there are no other frames waiting */ 3688233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3689233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3690227364Sadrian 3691233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3692227364Sadrian 3693227364Sadrian /* Free buffer, bf is free after this call */ 3694227364Sadrian ath_tx_default_comp(sc, bf, 0); 3695227364Sadrian return; 3696227364Sadrian } 3697227364Sadrian 3698227364Sadrian /* 3699227364Sadrian * This increments the retry counter as well as 3700227364Sadrian * sets the retry flag in the ath_buf and packet 3701227364Sadrian * body. 3702227364Sadrian */ 3703227364Sadrian ath_tx_set_retry(sc, bf); 3704240639Sadrian sc->sc_stats.ast_tx_swretries++; 3705227364Sadrian 3706227364Sadrian /* 3707227364Sadrian * Insert this at the head of the queue, so it's 3708227364Sadrian * retried before any current/subsequent frames. 3709227364Sadrian */ 3710227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3711227364Sadrian ath_tx_tid_sched(sc, atid); 3712233908Sadrian /* Send the BAR if there are no other frames waiting */ 3713233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3714233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3715227364Sadrian 3716227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3717227364Sadrian} 3718227364Sadrian 3719227364Sadrian/* 3720227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3721227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3722227364Sadrian * buffers. 3723227364Sadrian * 3724227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3725227364Sadrian */ 3726227364Sadrianstatic int 3727227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3728227364Sadrian ath_bufhead *bf_q) 3729227364Sadrian{ 3730227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3731227364Sadrian struct ath_node *an = ATH_NODE(ni); 3732227364Sadrian int tid = bf->bf_state.bfs_tid; 3733227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3734227364Sadrian 3735227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 3736227364Sadrian 3737240255Sadrian /* XXX clr11naggr should be done for all subframes */ 3738227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3739227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 3740240639Sadrian 3741227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 3742227364Sadrian 3743227364Sadrian /* 3744227364Sadrian * If the buffer is marked as busy, we can't directly 3745227364Sadrian * reuse it. Instead, try to clone the buffer. 3746227364Sadrian * If the clone is successful, recycle the old buffer. 3747227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3748227364Sadrian * to force the next bit of code to free the buffer 3749227364Sadrian * for us. 3750227364Sadrian */ 3751227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3752227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3753227364Sadrian struct ath_buf *nbf; 3754227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3755227364Sadrian if (nbf) 3756227364Sadrian /* bf has been freed at this point */ 3757227364Sadrian bf = nbf; 3758227364Sadrian else 3759227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3760227364Sadrian } 3761227364Sadrian 3762227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3763227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3764227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3765227364Sadrian "%s: max retries: seqno %d\n", 3766227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3767227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3768227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3769227364Sadrian device_printf(sc->sc_dev, 3770227364Sadrian "%s: wasn't added: seqno %d\n", 3771227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3772227364Sadrian bf->bf_state.bfs_dobaw = 0; 3773227364Sadrian return 1; 3774227364Sadrian } 3775227364Sadrian 3776227364Sadrian ath_tx_set_retry(sc, bf); 3777240639Sadrian sc->sc_stats.ast_tx_swretries++; 3778227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 3779227364Sadrian 3780240255Sadrian /* Clear the aggregate state */ 3781240255Sadrian bf->bf_state.bfs_aggr = 0; 3782240255Sadrian bf->bf_state.bfs_ndelim = 0; /* ??? needed? */ 3783240255Sadrian bf->bf_state.bfs_nframes = 1; 3784240255Sadrian 3785227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3786227364Sadrian return 0; 3787227364Sadrian} 3788227364Sadrian 3789227364Sadrian/* 3790227364Sadrian * error pkt completion for an aggregate destination 3791227364Sadrian */ 3792227364Sadrianstatic void 3793227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 3794227364Sadrian struct ath_tid *tid) 3795227364Sadrian{ 3796227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3797227364Sadrian struct ath_node *an = ATH_NODE(ni); 3798227364Sadrian struct ath_buf *bf_next, *bf; 3799227364Sadrian ath_bufhead bf_q; 3800227364Sadrian int drops = 0; 3801227364Sadrian struct ieee80211_tx_ampdu *tap; 3802227364Sadrian ath_bufhead bf_cq; 3803227364Sadrian 3804227364Sadrian TAILQ_INIT(&bf_q); 3805227364Sadrian TAILQ_INIT(&bf_cq); 3806227364Sadrian 3807227364Sadrian /* 3808227364Sadrian * Update rate control - all frames have failed. 3809227364Sadrian * 3810227364Sadrian * XXX use the length in the first frame in the series; 3811227364Sadrian * XXX just so things are consistent for now. 3812227364Sadrian */ 3813227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 3814227364Sadrian &bf_first->bf_status.ds_txstat, 3815227364Sadrian bf_first->bf_state.bfs_pktlen, 3816227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 3817227364Sadrian 3818227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3819227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3820227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 3821227364Sadrian 3822227364Sadrian /* Retry all subframes */ 3823227364Sadrian bf = bf_first; 3824227364Sadrian while (bf) { 3825227364Sadrian bf_next = bf->bf_next; 3826227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3827227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3828227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3829227364Sadrian drops++; 3830227364Sadrian bf->bf_next = NULL; 3831227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3832227364Sadrian } 3833227364Sadrian bf = bf_next; 3834227364Sadrian } 3835227364Sadrian 3836227364Sadrian /* Prepend all frames to the beginning of the queue */ 3837227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3838227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3839227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 3840227364Sadrian } 3841227364Sadrian 3842234725Sadrian /* 3843234725Sadrian * Schedule the TID to be re-tried. 3844234725Sadrian */ 3845227364Sadrian ath_tx_tid_sched(sc, tid); 3846227364Sadrian 3847227364Sadrian /* 3848227364Sadrian * send bar if we dropped any frames 3849227364Sadrian * 3850227364Sadrian * Keep the txq lock held for now, as we need to ensure 3851227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 3852227364Sadrian * in the ifnet TX context or raw TX context.) 3853227364Sadrian */ 3854227364Sadrian if (drops) { 3855233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3856233908Sadrian ath_tx_tid_bar_suspend(sc, tid); 3857227364Sadrian } 3858227364Sadrian 3859233908Sadrian /* 3860233908Sadrian * Send BAR if required 3861233908Sadrian */ 3862233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, tid)) 3863233908Sadrian ath_tx_tid_bar_tx(sc, tid); 3864240639Sadrian 3865233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3866233908Sadrian 3867227364Sadrian /* Complete frames which errored out */ 3868227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3869227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3870227364Sadrian ath_tx_default_comp(sc, bf, 0); 3871227364Sadrian } 3872227364Sadrian} 3873227364Sadrian 3874227364Sadrian/* 3875227364Sadrian * Handle clean-up of packets from an aggregate list. 3876227364Sadrian * 3877227364Sadrian * There's no need to update the BAW here - the session is being 3878227364Sadrian * torn down. 3879227364Sadrian */ 3880227364Sadrianstatic void 3881227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3882227364Sadrian{ 3883227364Sadrian struct ath_buf *bf, *bf_next; 3884227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3885227364Sadrian struct ath_node *an = ATH_NODE(ni); 3886227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3887227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3888227364Sadrian 3889227364Sadrian bf = bf_first; 3890227364Sadrian 3891227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3892227364Sadrian 3893227364Sadrian /* update incomp */ 3894227364Sadrian while (bf) { 3895227364Sadrian atid->incomp--; 3896227364Sadrian bf = bf->bf_next; 3897227364Sadrian } 3898227364Sadrian 3899227364Sadrian if (atid->incomp == 0) { 3900227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3901227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3902227364Sadrian __func__, tid); 3903227364Sadrian atid->cleanup_inprogress = 0; 3904227364Sadrian ath_tx_tid_resume(sc, atid); 3905227364Sadrian } 3906233908Sadrian 3907233908Sadrian /* Send BAR if required */ 3908240639Sadrian /* XXX why would we send a BAR when transitioning to non-aggregation? */ 3909233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3910233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3911240639Sadrian 3912227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3913227364Sadrian 3914227364Sadrian /* Handle frame completion */ 3915227364Sadrian while (bf) { 3916227364Sadrian bf_next = bf->bf_next; 3917227364Sadrian ath_tx_default_comp(sc, bf, 1); 3918227364Sadrian bf = bf_next; 3919227364Sadrian } 3920227364Sadrian} 3921227364Sadrian 3922227364Sadrian/* 3923227364Sadrian * Handle completion of an set of aggregate frames. 3924227364Sadrian * 3925227364Sadrian * XXX for now, simply complete each sub-frame. 3926227364Sadrian * 3927227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3928227364Sadrian * not the last descriptor in the first frame. 3929227364Sadrian */ 3930227364Sadrianstatic void 3931229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 3932229949Sadrian int fail) 3933227364Sadrian{ 3934227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3935227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3936227364Sadrian struct ath_node *an = ATH_NODE(ni); 3937227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3938227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3939227364Sadrian struct ath_tx_status ts; 3940227364Sadrian struct ieee80211_tx_ampdu *tap; 3941227364Sadrian ath_bufhead bf_q; 3942227364Sadrian ath_bufhead bf_cq; 3943227364Sadrian int seq_st, tx_ok; 3944227364Sadrian int hasba, isaggr; 3945227364Sadrian uint32_t ba[2]; 3946227364Sadrian struct ath_buf *bf, *bf_next; 3947227364Sadrian int ba_index; 3948227364Sadrian int drops = 0; 3949227364Sadrian int nframes = 0, nbad = 0, nf; 3950227364Sadrian int pktlen; 3951227364Sadrian /* XXX there's too much on the stack? */ 3952236038Sadrian struct ath_rc_series rc[ATH_RC_NUM]; 3953227364Sadrian int txseq; 3954227364Sadrian 3955227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3956227364Sadrian __func__, atid->hwq_depth); 3957227364Sadrian 3958240677Sadrian /* 3959240677Sadrian * Take a copy; this may be needed -after- bf_first 3960240677Sadrian * has been completed and freed. 3961240677Sadrian */ 3962240677Sadrian ts = bf_first->bf_status.ds_txstat; 3963240677Sadrian 3964240639Sadrian TAILQ_INIT(&bf_q); 3965240639Sadrian TAILQ_INIT(&bf_cq); 3966240639Sadrian 3967227364Sadrian /* The TID state is kept behind the TXQ lock */ 3968227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3969227364Sadrian 3970227364Sadrian atid->hwq_depth--; 3971227364Sadrian if (atid->hwq_depth < 0) 3972227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3973227364Sadrian __func__, atid->hwq_depth); 3974227364Sadrian 3975227364Sadrian /* 3976240639Sadrian * If the TID is filtered, handle completing the filter 3977240639Sadrian * transition before potentially kicking it to the cleanup 3978240639Sadrian * function. 3979240677Sadrian * 3980240677Sadrian * XXX this is duplicate work, ew. 3981240639Sadrian */ 3982240639Sadrian if (atid->isfiltered) 3983240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 3984240639Sadrian 3985240639Sadrian /* 3986227364Sadrian * Punt cleanup to the relevant function, not our problem now 3987227364Sadrian */ 3988227364Sadrian if (atid->cleanup_inprogress) { 3989240639Sadrian if (atid->isfiltered) 3990240639Sadrian device_printf(sc->sc_dev, 3991240639Sadrian "%s: isfiltered=1, normal_comp?\n", 3992240639Sadrian __func__); 3993227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3994227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3995227364Sadrian return; 3996227364Sadrian } 3997227364Sadrian 3998227364Sadrian /* 3999240639Sadrian * If the frame is filtered, transition to filtered frame 4000240639Sadrian * mode and add this to the filtered frame list. 4001240639Sadrian * 4002240639Sadrian * XXX TODO: figure out how this interoperates with 4003240639Sadrian * BAR, pause and cleanup states. 4004240639Sadrian */ 4005240639Sadrian if ((ts.ts_status & HAL_TXERR_FILT) || 4006240639Sadrian (ts.ts_status != 0 && atid->isfiltered)) { 4007240639Sadrian if (fail != 0) 4008240639Sadrian device_printf(sc->sc_dev, 4009240639Sadrian "%s: isfiltered=1, fail=%d\n", __func__, fail); 4010240639Sadrian ath_tx_tid_filt_comp_aggr(sc, atid, bf_first, &bf_cq); 4011240639Sadrian 4012240639Sadrian /* Remove from BAW */ 4013240639Sadrian TAILQ_FOREACH_SAFE(bf, &bf_cq, bf_list, bf_next) { 4014240639Sadrian if (bf->bf_state.bfs_addedbaw) 4015240639Sadrian drops++; 4016240639Sadrian if (bf->bf_state.bfs_dobaw) { 4017240639Sadrian ath_tx_update_baw(sc, an, atid, bf); 4018240639Sadrian if (! bf->bf_state.bfs_addedbaw) 4019240639Sadrian device_printf(sc->sc_dev, 4020240639Sadrian "%s: wasn't added: seqno %d\n", 4021240639Sadrian __func__, 4022240639Sadrian SEQNO(bf->bf_state.bfs_seqno)); 4023240639Sadrian } 4024240639Sadrian bf->bf_state.bfs_dobaw = 0; 4025240639Sadrian } 4026240639Sadrian /* 4027240639Sadrian * If any intermediate frames in the BAW were dropped when 4028240639Sadrian * handling filtering things, send a BAR. 4029240639Sadrian */ 4030240639Sadrian if (drops) 4031240639Sadrian ath_tx_tid_bar_suspend(sc, atid); 4032240639Sadrian 4033240639Sadrian /* 4034240639Sadrian * Finish up by sending a BAR if required and freeing 4035240639Sadrian * the frames outside of the TX lock. 4036240639Sadrian */ 4037240639Sadrian goto finish_send_bar; 4038240639Sadrian } 4039240639Sadrian 4040240639Sadrian /* 4041227364Sadrian * XXX for now, use the first frame in the aggregate for 4042227364Sadrian * XXX rate control completion; it's at least consistent. 4043227364Sadrian */ 4044227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 4045227364Sadrian 4046227364Sadrian /* 4047235461Sadrian * Handle errors first! 4048235461Sadrian * 4049235461Sadrian * Here, handle _any_ error as a "exceeded retries" error. 4050235461Sadrian * Later on (when filtered frames are to be specially handled) 4051235461Sadrian * it'll have to be expanded. 4052227364Sadrian */ 4053235461Sadrian#if 0 4054227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 4055235461Sadrian#endif 4056235461Sadrian if (ts.ts_status != 0) { 4057227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4058227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 4059227364Sadrian return; 4060227364Sadrian } 4061227364Sadrian 4062227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4063227364Sadrian 4064227364Sadrian /* 4065227364Sadrian * extract starting sequence and block-ack bitmap 4066227364Sadrian */ 4067227364Sadrian /* XXX endian-ness of seq_st, ba? */ 4068227364Sadrian seq_st = ts.ts_seqnum; 4069227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 4070227364Sadrian tx_ok = (ts.ts_status == 0); 4071227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 4072227364Sadrian ba[0] = ts.ts_ba_low; 4073227364Sadrian ba[1] = ts.ts_ba_high; 4074227364Sadrian 4075227364Sadrian /* 4076227364Sadrian * Copy the TX completion status and the rate control 4077227364Sadrian * series from the first descriptor, as it may be freed 4078227364Sadrian * before the rate control code can get its grubby fingers 4079227364Sadrian * into things. 4080227364Sadrian */ 4081227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 4082227364Sadrian 4083227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4084229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 4085229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 4086227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 4087227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 4088227364Sadrian 4089227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 4090227364Sadrian if (tid != ts.ts_tid) { 4091227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 4092227364Sadrian __func__, tid, ts.ts_tid); 4093227364Sadrian tx_ok = 0; 4094227364Sadrian } 4095227364Sadrian 4096227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 4097227364Sadrian if (isaggr && tx_ok && (! hasba)) { 4098227364Sadrian device_printf(sc->sc_dev, 4099229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 4100229949Sadrian "seq_st=%d\n", 4101227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 4102227364Sadrian /* XXX TODO: schedule an interface reset */ 4103238350Sjhb#ifdef ATH_DEBUG 4104238338Sadrian ath_printtxbuf(sc, bf_first, 4105238338Sadrian sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0); 4106238350Sjhb#endif 4107227364Sadrian } 4108227364Sadrian 4109227364Sadrian /* 4110227364Sadrian * Walk the list of frames, figure out which ones were correctly 4111227364Sadrian * sent and which weren't. 4112227364Sadrian */ 4113227364Sadrian bf = bf_first; 4114227364Sadrian nf = bf_first->bf_state.bfs_nframes; 4115227364Sadrian 4116227364Sadrian /* bf_first is going to be invalid once this list is walked */ 4117227364Sadrian bf_first = NULL; 4118227364Sadrian 4119227364Sadrian /* 4120227364Sadrian * Walk the list of completed frames and determine 4121227364Sadrian * which need to be completed and which need to be 4122227364Sadrian * retransmitted. 4123227364Sadrian * 4124227364Sadrian * For completed frames, the completion functions need 4125227364Sadrian * to be called at the end of this function as the last 4126227364Sadrian * node reference may free the node. 4127227364Sadrian * 4128227364Sadrian * Finally, since the TXQ lock can't be held during the 4129227364Sadrian * completion callback (to avoid lock recursion), 4130227364Sadrian * the completion calls have to be done outside of the 4131227364Sadrian * lock. 4132227364Sadrian */ 4133227364Sadrian while (bf) { 4134227364Sadrian nframes++; 4135229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 4136229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 4137227364Sadrian bf_next = bf->bf_next; 4138227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 4139227364Sadrian 4140227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4141227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 4142227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 4143227364Sadrian ATH_BA_ISSET(ba, ba_index)); 4144227364Sadrian 4145227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 4146227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 4147227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 4148227364Sadrian bf->bf_state.bfs_dobaw = 0; 4149227364Sadrian if (! bf->bf_state.bfs_addedbaw) 4150227364Sadrian device_printf(sc->sc_dev, 4151227364Sadrian "%s: wasn't added: seqno %d\n", 4152227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4153227364Sadrian bf->bf_next = NULL; 4154227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 4155227364Sadrian } else { 4156227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 4157227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 4158227364Sadrian drops++; 4159227364Sadrian bf->bf_next = NULL; 4160227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 4161227364Sadrian } 4162227364Sadrian nbad++; 4163227364Sadrian } 4164227364Sadrian bf = bf_next; 4165227364Sadrian } 4166227364Sadrian 4167227364Sadrian /* 4168227364Sadrian * Now that the BAW updates have been done, unlock 4169227364Sadrian * 4170227364Sadrian * txseq is grabbed before the lock is released so we 4171227364Sadrian * have a consistent view of what -was- in the BAW. 4172227364Sadrian * Anything after this point will not yet have been 4173227364Sadrian * TXed. 4174227364Sadrian */ 4175227364Sadrian txseq = tap->txa_start; 4176227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4177227364Sadrian 4178227364Sadrian if (nframes != nf) 4179227364Sadrian device_printf(sc->sc_dev, 4180227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 4181227364Sadrian __func__, nframes, nf); 4182227364Sadrian 4183227364Sadrian /* 4184227364Sadrian * Now we know how many frames were bad, call the rate 4185227364Sadrian * control code. 4186227364Sadrian */ 4187227364Sadrian if (fail == 0) 4188229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 4189229949Sadrian nbad); 4190227364Sadrian 4191227364Sadrian /* 4192227364Sadrian * send bar if we dropped any frames 4193227364Sadrian */ 4194227364Sadrian if (drops) { 4195233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 4196233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4197233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 4198233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4199227364Sadrian } 4200227364Sadrian 4201234725Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4202234725Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 4203234725Sadrian 4204234725Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4205234725Sadrian 4206227364Sadrian /* Prepend all frames to the beginning of the queue */ 4207227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 4208227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 4209227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 4210227364Sadrian } 4211234725Sadrian 4212234725Sadrian /* 4213234725Sadrian * Reschedule to grab some further frames. 4214234725Sadrian */ 4215227364Sadrian ath_tx_tid_sched(sc, atid); 4216227364Sadrian 4217233908Sadrian /* 4218240639Sadrian * If the queue is filtered, re-schedule as required. 4219240639Sadrian * 4220240639Sadrian * This is required as there may be a subsequent TX descriptor 4221240639Sadrian * for this end-node that has CLRDMASK set, so it's quite possible 4222240639Sadrian * that a filtered frame will be followed by a non-filtered 4223240639Sadrian * (complete or otherwise) frame. 4224240639Sadrian * 4225240639Sadrian * XXX should we do this before we complete the frame? 4226240639Sadrian */ 4227240639Sadrian if (atid->isfiltered) 4228240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4229240639Sadrian 4230240639Sadrianfinish_send_bar: 4231240639Sadrian 4232240639Sadrian /* 4233233908Sadrian * Send BAR if required 4234233908Sadrian */ 4235233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4236233908Sadrian ath_tx_tid_bar_tx(sc, atid); 4237234725Sadrian 4238233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4239233908Sadrian 4240227364Sadrian /* Do deferred completion */ 4241227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 4242227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 4243227364Sadrian ath_tx_default_comp(sc, bf, 0); 4244227364Sadrian } 4245227364Sadrian} 4246227364Sadrian 4247227364Sadrian/* 4248227364Sadrian * Handle completion of unaggregated frames in an ADDBA 4249227364Sadrian * session. 4250227364Sadrian * 4251227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 4252227364Sadrian * ath_tx_draintxq(). 4253227364Sadrian */ 4254227364Sadrianstatic void 4255227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 4256227364Sadrian{ 4257227364Sadrian struct ieee80211_node *ni = bf->bf_node; 4258227364Sadrian struct ath_node *an = ATH_NODE(ni); 4259227364Sadrian int tid = bf->bf_state.bfs_tid; 4260227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4261240677Sadrian struct ath_tx_status ts; 4262240639Sadrian int drops = 0; 4263227364Sadrian 4264227364Sadrian /* 4265240677Sadrian * Take a copy of this; filtering/cloning the frame may free the 4266240677Sadrian * bf pointer. 4267240677Sadrian */ 4268240677Sadrian ts = bf->bf_status.ds_txstat; 4269240677Sadrian 4270240677Sadrian /* 4271227364Sadrian * Update rate control status here, before we possibly 4272227364Sadrian * punt to retry or cleanup. 4273227364Sadrian * 4274227364Sadrian * Do it outside of the TXQ lock. 4275227364Sadrian */ 4276233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 4277227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 4278227364Sadrian &bf->bf_status.ds_txstat, 4279227364Sadrian bf->bf_state.bfs_pktlen, 4280240677Sadrian 1, (ts.ts_status == 0) ? 0 : 1); 4281227364Sadrian 4282227364Sadrian /* 4283227364Sadrian * This is called early so atid->hwq_depth can be tracked. 4284227364Sadrian * This unfortunately means that it's released and regrabbed 4285227364Sadrian * during retry and cleanup. That's rather inefficient. 4286227364Sadrian */ 4287227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4288227364Sadrian 4289227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4290227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 4291227364Sadrian 4292229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 4293229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 4294229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 4295229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 4296227364Sadrian 4297227364Sadrian atid->hwq_depth--; 4298227364Sadrian if (atid->hwq_depth < 0) 4299227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 4300227364Sadrian __func__, atid->hwq_depth); 4301227364Sadrian 4302227364Sadrian /* 4303240639Sadrian * If the TID is filtered, handle completing the filter 4304240639Sadrian * transition before potentially kicking it to the cleanup 4305240639Sadrian * function. 4306240639Sadrian */ 4307240639Sadrian if (atid->isfiltered) 4308240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4309240639Sadrian 4310240639Sadrian /* 4311227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 4312227364Sadrian * rather than handling it here. It's thus their 4313227364Sadrian * responsibility to clean up, call the completion 4314227364Sadrian * function in net80211, etc. 4315227364Sadrian */ 4316227364Sadrian if (atid->cleanup_inprogress) { 4317240639Sadrian if (atid->isfiltered) 4318240639Sadrian device_printf(sc->sc_dev, 4319240639Sadrian "%s: isfiltered=1, normal_comp?\n", 4320240639Sadrian __func__); 4321227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4322229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 4323229949Sadrian __func__); 4324227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 4325227364Sadrian return; 4326227364Sadrian } 4327227364Sadrian 4328227364Sadrian /* 4329240639Sadrian * XXX TODO: how does cleanup, BAR and filtered frame handling 4330240639Sadrian * overlap? 4331240639Sadrian * 4332240639Sadrian * If the frame is filtered OR if it's any failure but 4333240639Sadrian * the TID is filtered, the frame must be added to the 4334240639Sadrian * filtered frame list. 4335240639Sadrian * 4336240639Sadrian * However - a busy buffer can't be added to the filtered 4337240639Sadrian * list as it will end up being recycled without having 4338240639Sadrian * been made available for the hardware. 4339240639Sadrian */ 4340240677Sadrian if ((ts.ts_status & HAL_TXERR_FILT) || 4341240677Sadrian (ts.ts_status != 0 && atid->isfiltered)) { 4342240639Sadrian int freeframe; 4343240639Sadrian 4344240639Sadrian if (fail != 0) 4345240639Sadrian device_printf(sc->sc_dev, 4346240639Sadrian "%s: isfiltered=1, fail=%d\n", 4347240639Sadrian __func__, 4348240639Sadrian fail); 4349240639Sadrian freeframe = ath_tx_tid_filt_comp_single(sc, atid, bf); 4350240639Sadrian if (freeframe) { 4351240639Sadrian /* Remove from BAW */ 4352240639Sadrian if (bf->bf_state.bfs_addedbaw) 4353240639Sadrian drops++; 4354240639Sadrian if (bf->bf_state.bfs_dobaw) { 4355240639Sadrian ath_tx_update_baw(sc, an, atid, bf); 4356240639Sadrian if (! bf->bf_state.bfs_addedbaw) 4357240639Sadrian device_printf(sc->sc_dev, 4358240639Sadrian "%s: wasn't added: seqno %d\n", 4359240639Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4360240639Sadrian } 4361240639Sadrian bf->bf_state.bfs_dobaw = 0; 4362240639Sadrian } 4363240639Sadrian 4364240639Sadrian /* 4365240639Sadrian * If the frame couldn't be filtered, treat it as a drop and 4366240639Sadrian * prepare to send a BAR. 4367240639Sadrian */ 4368240639Sadrian if (freeframe && drops) 4369240639Sadrian ath_tx_tid_bar_suspend(sc, atid); 4370240639Sadrian 4371240639Sadrian /* 4372240639Sadrian * Send BAR if required 4373240639Sadrian */ 4374240639Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4375240639Sadrian ath_tx_tid_bar_tx(sc, atid); 4376240639Sadrian 4377240639Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4378240639Sadrian /* 4379240639Sadrian * If freeframe is set, then the frame couldn't be 4380240639Sadrian * cloned and bf is still valid. Just complete/free it. 4381240639Sadrian */ 4382240639Sadrian if (freeframe) 4383240639Sadrian ath_tx_default_comp(sc, bf, fail); 4384240639Sadrian 4385240639Sadrian 4386240639Sadrian return; 4387240639Sadrian } 4388240639Sadrian /* 4389227364Sadrian * Don't bother with the retry check if all frames 4390227364Sadrian * are being failed (eg during queue deletion.) 4391227364Sadrian */ 4392235461Sadrian#if 0 4393227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 4394235461Sadrian#endif 4395240677Sadrian if (fail == 0 && ts.ts_status != 0) { 4396227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4397229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 4398229949Sadrian __func__); 4399227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 4400227364Sadrian return; 4401227364Sadrian } 4402227364Sadrian 4403227364Sadrian /* Success? Complete */ 4404227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 4405227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 4406227364Sadrian if (bf->bf_state.bfs_dobaw) { 4407227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 4408227364Sadrian bf->bf_state.bfs_dobaw = 0; 4409227364Sadrian if (! bf->bf_state.bfs_addedbaw) 4410227364Sadrian device_printf(sc->sc_dev, 4411227364Sadrian "%s: wasn't added: seqno %d\n", 4412227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4413227364Sadrian } 4414227364Sadrian 4415233908Sadrian /* 4416240639Sadrian * If the queue is filtered, re-schedule as required. 4417240639Sadrian * 4418240639Sadrian * This is required as there may be a subsequent TX descriptor 4419240639Sadrian * for this end-node that has CLRDMASK set, so it's quite possible 4420240639Sadrian * that a filtered frame will be followed by a non-filtered 4421240639Sadrian * (complete or otherwise) frame. 4422240639Sadrian * 4423240639Sadrian * XXX should we do this before we complete the frame? 4424240639Sadrian */ 4425240639Sadrian if (atid->isfiltered) 4426240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4427240639Sadrian 4428240639Sadrian /* 4429233908Sadrian * Send BAR if required 4430233908Sadrian */ 4431233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4432233908Sadrian ath_tx_tid_bar_tx(sc, atid); 4433233908Sadrian 4434227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4435227364Sadrian 4436227364Sadrian ath_tx_default_comp(sc, bf, fail); 4437227364Sadrian /* bf is freed at this point */ 4438227364Sadrian} 4439227364Sadrian 4440227364Sadrianvoid 4441227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 4442227364Sadrian{ 4443227364Sadrian if (bf->bf_state.bfs_aggr) 4444227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 4445227364Sadrian else 4446227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 4447227364Sadrian} 4448227364Sadrian 4449227364Sadrian/* 4450227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4451227364Sadrian * 4452227364Sadrian * This is the aggregate version. 4453227364Sadrian */ 4454227364Sadrianvoid 4455227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 4456227364Sadrian struct ath_tid *tid) 4457227364Sadrian{ 4458227364Sadrian struct ath_buf *bf; 4459227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4460227364Sadrian struct ieee80211_tx_ampdu *tap; 4461227364Sadrian ATH_AGGR_STATUS status; 4462227364Sadrian ath_bufhead bf_q; 4463227364Sadrian 4464227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 4465227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4466227364Sadrian 4467227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 4468227364Sadrian 4469227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 4470227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 4471227364Sadrian __func__); 4472227364Sadrian 4473227364Sadrian for (;;) { 4474227364Sadrian status = ATH_AGGR_DONE; 4475227364Sadrian 4476227364Sadrian /* 4477227364Sadrian * If the upper layer has paused the TID, don't 4478227364Sadrian * queue any further packets. 4479227364Sadrian * 4480227364Sadrian * This can also occur from the completion task because 4481227364Sadrian * of packet loss; but as its serialised with this code, 4482227364Sadrian * it won't "appear" half way through queuing packets. 4483227364Sadrian */ 4484227364Sadrian if (tid->paused) 4485227364Sadrian break; 4486227364Sadrian 4487227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 4488227364Sadrian if (bf == NULL) { 4489227364Sadrian break; 4490227364Sadrian } 4491227364Sadrian 4492227364Sadrian /* 4493227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 4494227364Sadrian * data frame), schedule it directly; continue. 4495227364Sadrian */ 4496227364Sadrian if (! bf->bf_state.bfs_dobaw) { 4497229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4498229949Sadrian "%s: non-baw packet\n", 4499227364Sadrian __func__); 4500227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 4501240180Sadrian 4502240180Sadrian if (bf->bf_state.bfs_nframes > 1) 4503240180Sadrian device_printf(sc->sc_dev, 4504240180Sadrian "%s: aggr=%d, nframes=%d\n", 4505240180Sadrian __func__, 4506240180Sadrian bf->bf_state.bfs_aggr, 4507240180Sadrian bf->bf_state.bfs_nframes); 4508240180Sadrian 4509240180Sadrian /* 4510240180Sadrian * This shouldn't happen - such frames shouldn't 4511240180Sadrian * ever have been queued as an aggregate in the 4512240180Sadrian * first place. However, make sure the fields 4513240180Sadrian * are correctly setup just to be totally sure. 4514240180Sadrian */ 4515227364Sadrian bf->bf_state.bfs_aggr = 0; 4516240180Sadrian bf->bf_state.bfs_nframes = 1; 4517240180Sadrian 4518227364Sadrian ath_tx_do_ratelookup(sc, bf); 4519233989Sadrian ath_tx_calc_duration(sc, bf); 4520233989Sadrian ath_tx_calc_protection(sc, bf); 4521233989Sadrian ath_tx_set_rtscts(sc, bf); 4522227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4523227364Sadrian ath_tx_setds(sc, bf); 4524227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4525227364Sadrian 4526227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 4527227364Sadrian 4528227364Sadrian /* Queue the packet; continue */ 4529227364Sadrian goto queuepkt; 4530227364Sadrian } 4531227364Sadrian 4532227364Sadrian TAILQ_INIT(&bf_q); 4533227364Sadrian 4534227364Sadrian /* 4535227364Sadrian * Do a rate control lookup on the first frame in the 4536227364Sadrian * list. The rate control code needs that to occur 4537227364Sadrian * before it can determine whether to TX. 4538227364Sadrian * It's inaccurate because the rate control code doesn't 4539227364Sadrian * really "do" aggregate lookups, so it only considers 4540227364Sadrian * the size of the first frame. 4541227364Sadrian */ 4542227364Sadrian ath_tx_do_ratelookup(sc, bf); 4543227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 4544227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 4545233989Sadrian 4546233989Sadrian ath_tx_calc_duration(sc, bf); 4547233989Sadrian ath_tx_calc_protection(sc, bf); 4548233989Sadrian 4549233989Sadrian ath_tx_set_rtscts(sc, bf); 4550227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4551227364Sadrian 4552227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 4553227364Sadrian 4554227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4555227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 4556227364Sadrian 4557227364Sadrian /* 4558227364Sadrian * No frames to be picked up - out of BAW 4559227364Sadrian */ 4560227364Sadrian if (TAILQ_EMPTY(&bf_q)) 4561227364Sadrian break; 4562227364Sadrian 4563227364Sadrian /* 4564227364Sadrian * This assumes that the descriptor list in the ath_bufhead 4565227364Sadrian * are already linked together via bf_next pointers. 4566227364Sadrian */ 4567227364Sadrian bf = TAILQ_FIRST(&bf_q); 4568227364Sadrian 4569233989Sadrian if (status == ATH_AGGR_8K_LIMITED) 4570233989Sadrian sc->sc_aggr_stats.aggr_rts_aggr_limited++; 4571233989Sadrian 4572227364Sadrian /* 4573227364Sadrian * If it's the only frame send as non-aggregate 4574227364Sadrian * assume that ath_tx_form_aggr() has checked 4575227364Sadrian * whether it's in the BAW and added it appropriately. 4576227364Sadrian */ 4577227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 4578227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4579227364Sadrian "%s: single-frame aggregate\n", __func__); 4580227364Sadrian bf->bf_state.bfs_aggr = 0; 4581240255Sadrian bf->bf_state.bfs_ndelim = 0; 4582227364Sadrian ath_tx_setds(sc, bf); 4583227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4584227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 4585227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 4586227364Sadrian else 4587227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 4588227364Sadrian } else { 4589227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4590229949Sadrian "%s: multi-frame aggregate: %d frames, " 4591229949Sadrian "length %d\n", 4592227364Sadrian __func__, bf->bf_state.bfs_nframes, 4593227364Sadrian bf->bf_state.bfs_al); 4594227364Sadrian bf->bf_state.bfs_aggr = 1; 4595227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 4596227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 4597227364Sadrian 4598227364Sadrian /* 4599233989Sadrian * Calculate the duration/protection as required. 4600233989Sadrian */ 4601233989Sadrian ath_tx_calc_duration(sc, bf); 4602233989Sadrian ath_tx_calc_protection(sc, bf); 4603233989Sadrian 4604233989Sadrian /* 4605227364Sadrian * Update the rate and rtscts information based on the 4606227364Sadrian * rate decision made by the rate control code; 4607227364Sadrian * the first frame in the aggregate needs it. 4608227364Sadrian */ 4609227364Sadrian ath_tx_set_rtscts(sc, bf); 4610227364Sadrian 4611227364Sadrian /* 4612227364Sadrian * Setup the relevant descriptor fields 4613227364Sadrian * for aggregation. The first descriptor 4614227364Sadrian * already points to the rest in the chain. 4615227364Sadrian */ 4616227364Sadrian ath_tx_setds_11n(sc, bf); 4617227364Sadrian 4618227364Sadrian } 4619227364Sadrian queuepkt: 4620227364Sadrian //txq = bf->bf_state.bfs_txq; 4621227364Sadrian 4622227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 4623227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 4624227364Sadrian 4625227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 4626227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 4627227364Sadrian 4628227364Sadrian /* Punt to txq */ 4629227364Sadrian ath_tx_handoff(sc, txq, bf); 4630227364Sadrian 4631227364Sadrian /* Track outstanding buffer count to hardware */ 4632227364Sadrian /* aggregates are "one" buffer */ 4633227364Sadrian tid->hwq_depth++; 4634227364Sadrian 4635227364Sadrian /* 4636227364Sadrian * Break out if ath_tx_form_aggr() indicated 4637227364Sadrian * there can't be any further progress (eg BAW is full.) 4638227364Sadrian * Checking for an empty txq is done above. 4639227364Sadrian * 4640227364Sadrian * XXX locking on txq here? 4641227364Sadrian */ 4642227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 4643227364Sadrian status == ATH_AGGR_BAW_CLOSED) 4644227364Sadrian break; 4645227364Sadrian } 4646227364Sadrian} 4647227364Sadrian 4648227364Sadrian/* 4649227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4650227364Sadrian */ 4651227364Sadrianvoid 4652227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 4653227364Sadrian struct ath_tid *tid) 4654227364Sadrian{ 4655227364Sadrian struct ath_buf *bf; 4656227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4657227364Sadrian 4658227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 4659227364Sadrian __func__, an, tid->tid); 4660227364Sadrian 4661227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4662227364Sadrian 4663227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 4664227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 4665227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 4666227364Sadrian __func__, tid->tid); 4667227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 4668227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 4669227364Sadrian __func__, tid->tid); 4670227364Sadrian 4671227364Sadrian for (;;) { 4672227364Sadrian 4673227364Sadrian /* 4674227364Sadrian * If the upper layers have paused the TID, don't 4675227364Sadrian * queue any further packets. 4676227364Sadrian */ 4677227364Sadrian if (tid->paused) 4678227364Sadrian break; 4679227364Sadrian 4680227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 4681227364Sadrian if (bf == NULL) { 4682227364Sadrian break; 4683227364Sadrian } 4684227364Sadrian 4685227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 4686227364Sadrian 4687227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 4688227364Sadrian 4689227364Sadrian /* Sanity check! */ 4690227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 4691227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 4692227364Sadrian " tid %d\n", 4693227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 4694227364Sadrian } 4695227364Sadrian /* Normal completion handler */ 4696227364Sadrian bf->bf_comp = ath_tx_normal_comp; 4697227364Sadrian 4698227364Sadrian /* Program descriptors + rate control */ 4699227364Sadrian ath_tx_do_ratelookup(sc, bf); 4700233989Sadrian ath_tx_calc_duration(sc, bf); 4701233989Sadrian ath_tx_calc_protection(sc, bf); 4702233989Sadrian ath_tx_set_rtscts(sc, bf); 4703227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4704227364Sadrian ath_tx_setds(sc, bf); 4705227364Sadrian 4706227364Sadrian /* Track outstanding buffer count to hardware */ 4707227364Sadrian /* aggregates are "one" buffer */ 4708227364Sadrian tid->hwq_depth++; 4709227364Sadrian 4710227364Sadrian /* Punt to hardware or software txq */ 4711227364Sadrian ath_tx_handoff(sc, txq, bf); 4712227364Sadrian } 4713227364Sadrian} 4714227364Sadrian 4715227364Sadrian/* 4716227364Sadrian * Schedule some packets to the given hardware queue. 4717227364Sadrian * 4718227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 4719227364Sadrian * with queued traffic) and attempts to schedule traffic 4720227364Sadrian * from them. 4721227364Sadrian * 4722227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 4723227364Sadrian * added to the end of the queue after some frames have been 4724227364Sadrian * scheduled. 4725227364Sadrian */ 4726227364Sadrianvoid 4727227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 4728227364Sadrian{ 4729227364Sadrian struct ath_tid *tid, *next, *last; 4730227364Sadrian 4731227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4732227364Sadrian 4733227364Sadrian /* 4734227364Sadrian * Don't schedule if the hardware queue is busy. 4735227364Sadrian * This (hopefully) gives some more time to aggregate 4736227364Sadrian * some packets in the aggregation queue. 4737227364Sadrian */ 4738227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4739227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 4740227364Sadrian return; 4741227364Sadrian } 4742227364Sadrian 4743227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 4744227364Sadrian 4745227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 4746227364Sadrian /* 4747227364Sadrian * Suspend paused queues here; they'll be resumed 4748227364Sadrian * once the addba completes or times out. 4749227364Sadrian */ 4750227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 4751227364Sadrian __func__, tid->tid, tid->paused); 4752227364Sadrian ath_tx_tid_unsched(sc, tid); 4753227364Sadrian if (tid->paused) { 4754227364Sadrian continue; 4755227364Sadrian } 4756227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 4757227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 4758227364Sadrian else 4759227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 4760227364Sadrian 4761227364Sadrian /* Not empty? Re-schedule */ 4762227364Sadrian if (tid->axq_depth != 0) 4763227364Sadrian ath_tx_tid_sched(sc, tid); 4764227364Sadrian 4765227364Sadrian /* Give the software queue time to aggregate more packets */ 4766227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4767227364Sadrian break; 4768227364Sadrian } 4769227364Sadrian 4770227364Sadrian /* 4771227364Sadrian * If this was the last entry on the original list, stop. 4772227364Sadrian * Otherwise nodes that have been rescheduled onto the end 4773227364Sadrian * of the TID FIFO list will just keep being rescheduled. 4774227364Sadrian */ 4775227364Sadrian if (tid == last) 4776227364Sadrian break; 4777227364Sadrian } 4778227364Sadrian} 4779227364Sadrian 4780227364Sadrian/* 4781227364Sadrian * TX addba handling 4782227364Sadrian */ 4783227364Sadrian 4784227364Sadrian/* 4785227364Sadrian * Return net80211 TID struct pointer, or NULL for none 4786227364Sadrian */ 4787227364Sadrianstruct ieee80211_tx_ampdu * 4788227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 4789227364Sadrian{ 4790227364Sadrian struct ieee80211_node *ni = &an->an_node; 4791227364Sadrian struct ieee80211_tx_ampdu *tap; 4792227364Sadrian 4793227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4794227364Sadrian return NULL; 4795227364Sadrian 4796234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 4797227364Sadrian return tap; 4798227364Sadrian} 4799227364Sadrian 4800227364Sadrian/* 4801227364Sadrian * Is AMPDU-TX running? 4802227364Sadrian */ 4803227364Sadrianstatic int 4804227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 4805227364Sadrian{ 4806227364Sadrian struct ieee80211_tx_ampdu *tap; 4807227364Sadrian 4808227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4809227364Sadrian return 0; 4810227364Sadrian 4811227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4812227364Sadrian if (tap == NULL) 4813227364Sadrian return 0; /* Not valid; default to not running */ 4814227364Sadrian 4815227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 4816227364Sadrian} 4817227364Sadrian 4818227364Sadrian/* 4819227364Sadrian * Is AMPDU-TX negotiation pending? 4820227364Sadrian */ 4821227364Sadrianstatic int 4822227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 4823227364Sadrian{ 4824227364Sadrian struct ieee80211_tx_ampdu *tap; 4825227364Sadrian 4826227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4827227364Sadrian return 0; 4828227364Sadrian 4829227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4830227364Sadrian if (tap == NULL) 4831227364Sadrian return 0; /* Not valid; default to not pending */ 4832227364Sadrian 4833227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 4834227364Sadrian} 4835227364Sadrian 4836227364Sadrian/* 4837227364Sadrian * Is AMPDU-TX pending for the given TID? 4838227364Sadrian */ 4839227364Sadrian 4840227364Sadrian 4841227364Sadrian/* 4842227364Sadrian * Method to handle sending an ADDBA request. 4843227364Sadrian * 4844227364Sadrian * We tap this so the relevant flags can be set to pause the TID 4845227364Sadrian * whilst waiting for the response. 4846227364Sadrian * 4847227364Sadrian * XXX there's no timeout handler we can override? 4848227364Sadrian */ 4849227364Sadrianint 4850227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4851227364Sadrian int dialogtoken, int baparamset, int batimeout) 4852227364Sadrian{ 4853227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4854234324Sadrian int tid = tap->txa_tid; 4855227364Sadrian struct ath_node *an = ATH_NODE(ni); 4856227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4857227364Sadrian 4858227364Sadrian /* 4859227364Sadrian * XXX danger Will Robinson! 4860227364Sadrian * 4861227364Sadrian * Although the taskqueue may be running and scheduling some more 4862227364Sadrian * packets, these should all be _before_ the addba sequence number. 4863227364Sadrian * However, net80211 will keep self-assigning sequence numbers 4864227364Sadrian * until addba has been negotiated. 4865227364Sadrian * 4866227364Sadrian * In the past, these packets would be "paused" (which still works 4867227364Sadrian * fine, as they're being scheduled to the driver in the same 4868227364Sadrian * serialised method which is calling the addba request routine) 4869227364Sadrian * and when the aggregation session begins, they'll be dequeued 4870227364Sadrian * as aggregate packets and added to the BAW. However, now there's 4871227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 4872227364Sadrian * packets. Thus they never get included in the BAW tracking and 4873227364Sadrian * this can cause the initial burst of packets after the addba 4874227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 4875227364Sadrian * 4876227364Sadrian * The "eventual" solution should be to tag these packets with 4877227364Sadrian * dobaw. Although net80211 has given us a sequence number, 4878227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 4879227364Sadrian * fall within it. 4880227364Sadrian */ 4881235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4882235774Sadrian /* 4883235774Sadrian * This is a bit annoying. Until net80211 HT code inherits some 4884235774Sadrian * (any) locking, we may have this called in parallel BUT only 4885235774Sadrian * one response/timeout will be called. Grr. 4886235774Sadrian */ 4887235774Sadrian if (atid->addba_tx_pending == 0) { 4888235774Sadrian ath_tx_tid_pause(sc, atid); 4889235774Sadrian atid->addba_tx_pending = 1; 4890235774Sadrian } 4891235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4892227364Sadrian 4893227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4894227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 4895227364Sadrian __func__, dialogtoken, baparamset, batimeout); 4896227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4897227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4898227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4899227364Sadrian 4900227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 4901227364Sadrian batimeout); 4902227364Sadrian} 4903227364Sadrian 4904227364Sadrian/* 4905227364Sadrian * Handle an ADDBA response. 4906227364Sadrian * 4907227364Sadrian * We unpause the queue so TX'ing can resume. 4908227364Sadrian * 4909227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 4910227364Sadrian * aggregate or not) so the BAW is updated. 4911227364Sadrian * 4912227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 4913227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 4914227364Sadrian * edge won't match the ni->ni_txseq. 4915227364Sadrian * 4916227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 4917227364Sadrian * ni->ni_txseq. 4918227364Sadrian * 4919227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 4920227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 4921227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 4922227364Sadrian * window. 4923227364Sadrian */ 4924227364Sadrianint 4925227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4926227364Sadrian int status, int code, int batimeout) 4927227364Sadrian{ 4928227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4929234324Sadrian int tid = tap->txa_tid; 4930227364Sadrian struct ath_node *an = ATH_NODE(ni); 4931227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4932227364Sadrian int r; 4933227364Sadrian 4934227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4935227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 4936227364Sadrian status, code, batimeout); 4937227364Sadrian 4938227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4939227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4940227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4941227364Sadrian 4942227364Sadrian /* 4943227364Sadrian * Call this first, so the interface flags get updated 4944227364Sadrian * before the TID is unpaused. Otherwise a race condition 4945227364Sadrian * exists where the unpaused TID still doesn't yet have 4946227364Sadrian * IEEE80211_AGGR_RUNNING set. 4947227364Sadrian */ 4948227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 4949227364Sadrian 4950227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4951235774Sadrian atid->addba_tx_pending = 0; 4952227364Sadrian /* 4953227364Sadrian * XXX dirty! 4954227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 4955227364Sadrian * Read above for more information. 4956227364Sadrian */ 4957227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 4958227364Sadrian ath_tx_tid_resume(sc, atid); 4959227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4960227364Sadrian return r; 4961227364Sadrian} 4962227364Sadrian 4963227364Sadrian 4964227364Sadrian/* 4965227364Sadrian * Stop ADDBA on a queue. 4966237593Sadrian * 4967237593Sadrian * This can be called whilst BAR TX is currently active on the queue, 4968237593Sadrian * so make sure this is unblocked before continuing. 4969227364Sadrian */ 4970227364Sadrianvoid 4971227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 4972227364Sadrian{ 4973227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4974234324Sadrian int tid = tap->txa_tid; 4975227364Sadrian struct ath_node *an = ATH_NODE(ni); 4976227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4977227364Sadrian 4978227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 4979227364Sadrian 4980237593Sadrian /* 4981237593Sadrian * Pause TID traffic early, so there aren't any races 4982237593Sadrian * Unblock the pending BAR held traffic, if it's currently paused. 4983237593Sadrian */ 4984235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4985227364Sadrian ath_tx_tid_pause(sc, atid); 4986237593Sadrian if (atid->bar_wait) { 4987237593Sadrian /* 4988237593Sadrian * bar_unsuspend() expects bar_tx == 1, as it should be 4989237593Sadrian * called from the TX completion path. This quietens 4990237593Sadrian * the warning. It's cleared for us anyway. 4991237593Sadrian */ 4992237593Sadrian atid->bar_tx = 1; 4993237593Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4994237593Sadrian } 4995235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4996227364Sadrian 4997227364Sadrian /* There's no need to hold the TXQ lock here */ 4998227364Sadrian sc->sc_addba_stop(ni, tap); 4999227364Sadrian 5000227364Sadrian /* 5001235749Sadrian * ath_tx_tid_cleanup will resume the TID if possible, otherwise 5002227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 5003227364Sadrian * things have been cleaned up. 5004227364Sadrian */ 5005235749Sadrian ath_tx_tid_cleanup(sc, an, tid); 5006227364Sadrian} 5007227364Sadrian 5008227364Sadrian/* 5009227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 5010227364Sadrian * it simply tears down the aggregation session. Ew. 5011227364Sadrian * 5012227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 5013227364Sadrian * ic->ic_addba_stop(). 5014227364Sadrian * 5015227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 5016227364Sadrian * XXX BAR TX success or failure should be better handled! 5017227364Sadrian */ 5018227364Sadrianvoid 5019227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 5020227364Sadrian int status) 5021227364Sadrian{ 5022227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5023234324Sadrian int tid = tap->txa_tid; 5024227364Sadrian struct ath_node *an = ATH_NODE(ni); 5025227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5026227364Sadrian int attempts = tap->txa_attempts; 5027227364Sadrian 5028235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 5029235676Sadrian "%s: called; tap=%p, atid=%p, txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n", 5030235491Sadrian __func__, 5031235676Sadrian tap, 5032235676Sadrian atid, 5033235676Sadrian tap->txa_tid, 5034235676Sadrian atid->tid, 5035235491Sadrian status, 5036235491Sadrian attempts); 5037227364Sadrian 5038227364Sadrian /* Note: This may update the BAW details */ 5039227364Sadrian sc->sc_bar_response(ni, tap, status); 5040227364Sadrian 5041227364Sadrian /* Unpause the TID */ 5042227364Sadrian /* 5043227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 5044227364Sadrian * XXX to a non-aggregate session. So we must unpause the 5045227364Sadrian * XXX TID here or it'll never be done. 5046227364Sadrian */ 5047227364Sadrian if (status == 0 || attempts == 50) { 5048227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 5049233908Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 5050227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 5051227364Sadrian } 5052227364Sadrian} 5053227364Sadrian 5054227364Sadrian/* 5055227364Sadrian * This is called whenever the pending ADDBA request times out. 5056227364Sadrian * Unpause and reschedule the TID. 5057227364Sadrian */ 5058227364Sadrianvoid 5059227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 5060227364Sadrian struct ieee80211_tx_ampdu *tap) 5061227364Sadrian{ 5062227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5063234324Sadrian int tid = tap->txa_tid; 5064227364Sadrian struct ath_node *an = ATH_NODE(ni); 5065227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5066227364Sadrian 5067227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5068227364Sadrian "%s: called; resuming\n", __func__); 5069227364Sadrian 5070235774Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 5071235774Sadrian atid->addba_tx_pending = 0; 5072235774Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 5073235774Sadrian 5074227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 5075227364Sadrian sc->sc_addba_response_timeout(ni, tap); 5076227364Sadrian 5077227364Sadrian /* Unpause the TID; which reschedules it */ 5078227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 5079227364Sadrian ath_tx_tid_resume(sc, atid); 5080227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 5081227364Sadrian} 5082238710Sadrian 5083238710Sadrianstatic int 5084238710Sadrianath_legacy_dma_txsetup(struct ath_softc *sc) 5085238710Sadrian{ 5086238710Sadrian 5087238710Sadrian /* nothing new needed */ 5088238710Sadrian return (0); 5089238710Sadrian} 5090238710Sadrian 5091238710Sadrianstatic int 5092238710Sadrianath_legacy_dma_txteardown(struct ath_softc *sc) 5093238710Sadrian{ 5094238710Sadrian 5095238710Sadrian /* nothing new needed */ 5096238710Sadrian return (0); 5097238710Sadrian} 5098238710Sadrian 5099238710Sadrianvoid 5100238710Sadrianath_xmit_setup_legacy(struct ath_softc *sc) 5101238710Sadrian{ 5102238729Sadrian /* 5103238729Sadrian * For now, just set the descriptor length to sizeof(ath_desc); 5104238729Sadrian * worry about extracting the real length out of the HAL later. 5105238729Sadrian */ 5106238729Sadrian sc->sc_tx_desclen = sizeof(struct ath_desc); 5107238729Sadrian sc->sc_tx_statuslen = 0; 5108238729Sadrian sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */ 5109238710Sadrian 5110238710Sadrian sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup; 5111238710Sadrian sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown; 5112238931Sadrian sc->sc_tx.xmit_attach_comp_func = ath_legacy_attach_comp_func; 5113238930Sadrian 5114238930Sadrian sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart; 5115238930Sadrian sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff; 5116239204Sadrian 5117239204Sadrian sc->sc_tx.xmit_drain = ath_legacy_tx_drain; 5118238710Sadrian} 5119