if_ath_tx.c revision 237593
1218065Sadrian/*- 2218065Sadrian * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 3218065Sadrian * All rights reserved. 4218065Sadrian * 5218065Sadrian * Redistribution and use in source and binary forms, with or without 6218065Sadrian * modification, are permitted provided that the following conditions 7218065Sadrian * are met: 8218065Sadrian * 1. Redistributions of source code must retain the above copyright 9218065Sadrian * notice, this list of conditions and the following disclaimer, 10218065Sadrian * without modification. 11218065Sadrian * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12218065Sadrian * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13218065Sadrian * redistribution must be conditioned upon including a substantially 14218065Sadrian * similar Disclaimer requirement for further binary redistribution. 15218065Sadrian * 16218065Sadrian * NO WARRANTY 17218065Sadrian * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18218065Sadrian * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19218065Sadrian * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 20218065Sadrian * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21218065Sadrian * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 22218065Sadrian * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23218065Sadrian * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24218065Sadrian * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25218065Sadrian * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26218065Sadrian * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27218065Sadrian * THE POSSIBILITY OF SUCH DAMAGES. 28218065Sadrian */ 29218065Sadrian 30218065Sadrian#include <sys/cdefs.h> 31218065Sadrian__FBSDID("$FreeBSD: head/sys/dev/ath/if_ath_tx.c 237593 2012-06-26 07:56:15Z adrian $"); 32218065Sadrian 33218065Sadrian/* 34218065Sadrian * Driver for the Atheros Wireless LAN controller. 35218065Sadrian * 36218065Sadrian * This software is derived from work of Atsushi Onoe; his contribution 37218065Sadrian * is greatly appreciated. 38218065Sadrian */ 39218065Sadrian 40218065Sadrian#include "opt_inet.h" 41218065Sadrian#include "opt_ath.h" 42218065Sadrian#include "opt_wlan.h" 43218065Sadrian 44218065Sadrian#include <sys/param.h> 45218065Sadrian#include <sys/systm.h> 46218065Sadrian#include <sys/sysctl.h> 47218065Sadrian#include <sys/mbuf.h> 48218065Sadrian#include <sys/malloc.h> 49218065Sadrian#include <sys/lock.h> 50218065Sadrian#include <sys/mutex.h> 51218065Sadrian#include <sys/kernel.h> 52218065Sadrian#include <sys/socket.h> 53218065Sadrian#include <sys/sockio.h> 54218065Sadrian#include <sys/errno.h> 55218065Sadrian#include <sys/callout.h> 56218065Sadrian#include <sys/bus.h> 57218065Sadrian#include <sys/endian.h> 58218065Sadrian#include <sys/kthread.h> 59218065Sadrian#include <sys/taskqueue.h> 60218065Sadrian#include <sys/priv.h> 61218065Sadrian 62218065Sadrian#include <machine/bus.h> 63218065Sadrian 64218065Sadrian#include <net/if.h> 65218065Sadrian#include <net/if_dl.h> 66218065Sadrian#include <net/if_media.h> 67218065Sadrian#include <net/if_types.h> 68218065Sadrian#include <net/if_arp.h> 69218065Sadrian#include <net/ethernet.h> 70218065Sadrian#include <net/if_llc.h> 71218065Sadrian 72218065Sadrian#include <net80211/ieee80211_var.h> 73218065Sadrian#include <net80211/ieee80211_regdomain.h> 74218065Sadrian#ifdef IEEE80211_SUPPORT_SUPERG 75218065Sadrian#include <net80211/ieee80211_superg.h> 76218065Sadrian#endif 77218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 78218065Sadrian#include <net80211/ieee80211_tdma.h> 79218065Sadrian#endif 80227364Sadrian#include <net80211/ieee80211_ht.h> 81218065Sadrian 82218065Sadrian#include <net/bpf.h> 83218065Sadrian 84218065Sadrian#ifdef INET 85218065Sadrian#include <netinet/in.h> 86218065Sadrian#include <netinet/if_ether.h> 87218065Sadrian#endif 88218065Sadrian 89218065Sadrian#include <dev/ath/if_athvar.h> 90218065Sadrian#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */ 91218065Sadrian#include <dev/ath/ath_hal/ah_diagcodes.h> 92218065Sadrian 93218065Sadrian#include <dev/ath/if_ath_debug.h> 94218065Sadrian 95218065Sadrian#ifdef ATH_TX99_DIAG 96218065Sadrian#include <dev/ath/ath_tx99/ath_tx99.h> 97218065Sadrian#endif 98218065Sadrian 99218065Sadrian#include <dev/ath/if_ath_misc.h> 100218065Sadrian#include <dev/ath/if_ath_tx.h> 101218240Sadrian#include <dev/ath/if_ath_tx_ht.h> 102218065Sadrian 103218154Sadrian/* 104227364Sadrian * How many retries to perform in software 105227364Sadrian */ 106227364Sadrian#define SWMAX_RETRIES 10 107227364Sadrian 108227364Sadrianstatic int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, 109227364Sadrian int tid); 110227364Sadrianstatic int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, 111227364Sadrian int tid); 112236872Sadrianstatic ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc, 113236872Sadrian struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0); 114227364Sadrianstatic int ath_tx_action_frame_override_queue(struct ath_softc *sc, 115227364Sadrian struct ieee80211_node *ni, struct mbuf *m0, int *tid); 116227364Sadrian 117227364Sadrian/* 118218154Sadrian * Whether to use the 11n rate scenario functions or not 119218154Sadrian */ 120218154Sadrianstatic inline int 121218154Sadrianath_tx_is_11n(struct ath_softc *sc) 122218154Sadrian{ 123218154Sadrian return (sc->sc_ah->ah_magic == 0x20065416); 124218154Sadrian} 125218154Sadrian 126227364Sadrian/* 127227364Sadrian * Obtain the current TID from the given frame. 128227364Sadrian * 129227364Sadrian * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.) 130227364Sadrian * This has implications for which AC/priority the packet is placed 131227364Sadrian * in. 132227364Sadrian */ 133227364Sadrianstatic int 134227364Sadrianath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0) 135227364Sadrian{ 136227364Sadrian const struct ieee80211_frame *wh; 137227364Sadrian int pri = M_WME_GETAC(m0); 138227364Sadrian 139227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 140227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 141227364Sadrian return IEEE80211_NONQOS_TID; 142227364Sadrian else 143227364Sadrian return WME_AC_TO_TID(pri); 144227364Sadrian} 145227364Sadrian 146227364Sadrian/* 147227364Sadrian * Determine what the correct AC queue for the given frame 148227364Sadrian * should be. 149227364Sadrian * 150227364Sadrian * This code assumes that the TIDs map consistently to 151227364Sadrian * the underlying hardware (or software) ath_txq. 152227364Sadrian * Since the sender may try to set an AC which is 153227364Sadrian * arbitrary, non-QoS TIDs may end up being put on 154227364Sadrian * completely different ACs. There's no way to put a 155227364Sadrian * TID into multiple ath_txq's for scheduling, so 156227364Sadrian * for now we override the AC/TXQ selection and set 157227364Sadrian * non-QOS TID frames into the BE queue. 158227364Sadrian * 159227364Sadrian * This may be completely incorrect - specifically, 160227364Sadrian * some management frames may end up out of order 161227364Sadrian * compared to the QoS traffic they're controlling. 162227364Sadrian * I'll look into this later. 163227364Sadrian */ 164227364Sadrianstatic int 165227364Sadrianath_tx_getac(struct ath_softc *sc, const struct mbuf *m0) 166227364Sadrian{ 167227364Sadrian const struct ieee80211_frame *wh; 168227364Sadrian int pri = M_WME_GETAC(m0); 169227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 170227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh)) 171227364Sadrian return pri; 172227364Sadrian 173227364Sadrian return WME_AC_BE; 174227364Sadrian} 175227364Sadrian 176218065Sadrianvoid 177218065Sadrianath_txfrag_cleanup(struct ath_softc *sc, 178218065Sadrian ath_bufhead *frags, struct ieee80211_node *ni) 179218065Sadrian{ 180218065Sadrian struct ath_buf *bf, *next; 181218065Sadrian 182218065Sadrian ATH_TXBUF_LOCK_ASSERT(sc); 183218065Sadrian 184227344Sadrian TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) { 185218065Sadrian /* NB: bf assumed clean */ 186227344Sadrian TAILQ_REMOVE(frags, bf, bf_list); 187236993Sadrian ath_returnbuf_head(sc, bf); 188218065Sadrian ieee80211_node_decref(ni); 189218065Sadrian } 190218065Sadrian} 191218065Sadrian 192218065Sadrian/* 193218065Sadrian * Setup xmit of a fragmented frame. Allocate a buffer 194218065Sadrian * for each frag and bump the node reference count to 195218065Sadrian * reflect the held reference to be setup by ath_tx_start. 196218065Sadrian */ 197218065Sadrianint 198218065Sadrianath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags, 199218065Sadrian struct mbuf *m0, struct ieee80211_node *ni) 200218065Sadrian{ 201218065Sadrian struct mbuf *m; 202218065Sadrian struct ath_buf *bf; 203218065Sadrian 204218065Sadrian ATH_TXBUF_LOCK(sc); 205218065Sadrian for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) { 206237000Sadrian /* XXX non-management? */ 207237000Sadrian bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL); 208218065Sadrian if (bf == NULL) { /* out of buffers, cleanup */ 209234009Sadrian device_printf(sc->sc_dev, "%s: no buffer?\n", 210234009Sadrian __func__); 211218065Sadrian ath_txfrag_cleanup(sc, frags, ni); 212218065Sadrian break; 213218065Sadrian } 214218065Sadrian ieee80211_node_incref(ni); 215227344Sadrian TAILQ_INSERT_TAIL(frags, bf, bf_list); 216218065Sadrian } 217218065Sadrian ATH_TXBUF_UNLOCK(sc); 218218065Sadrian 219227344Sadrian return !TAILQ_EMPTY(frags); 220218065Sadrian} 221218065Sadrian 222218065Sadrian/* 223218065Sadrian * Reclaim mbuf resources. For fragmented frames we 224218065Sadrian * need to claim each frag chained with m_nextpkt. 225218065Sadrian */ 226218065Sadrianvoid 227218065Sadrianath_freetx(struct mbuf *m) 228218065Sadrian{ 229218065Sadrian struct mbuf *next; 230218065Sadrian 231218065Sadrian do { 232218065Sadrian next = m->m_nextpkt; 233218065Sadrian m->m_nextpkt = NULL; 234218065Sadrian m_freem(m); 235218065Sadrian } while ((m = next) != NULL); 236218065Sadrian} 237218065Sadrian 238218065Sadrianstatic int 239218065Sadrianath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0) 240218065Sadrian{ 241218065Sadrian struct mbuf *m; 242218065Sadrian int error; 243218065Sadrian 244218065Sadrian /* 245218065Sadrian * Load the DMA map so any coalescing is done. This 246218065Sadrian * also calculates the number of descriptors we need. 247218065Sadrian */ 248218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 249218065Sadrian bf->bf_segs, &bf->bf_nseg, 250218065Sadrian BUS_DMA_NOWAIT); 251218065Sadrian if (error == EFBIG) { 252218065Sadrian /* XXX packet requires too many descriptors */ 253218065Sadrian bf->bf_nseg = ATH_TXDESC+1; 254218065Sadrian } else if (error != 0) { 255218065Sadrian sc->sc_stats.ast_tx_busdma++; 256218065Sadrian ath_freetx(m0); 257218065Sadrian return error; 258218065Sadrian } 259218065Sadrian /* 260218065Sadrian * Discard null packets and check for packets that 261218065Sadrian * require too many TX descriptors. We try to convert 262218065Sadrian * the latter to a cluster. 263218065Sadrian */ 264218065Sadrian if (bf->bf_nseg > ATH_TXDESC) { /* too many desc's, linearize */ 265218065Sadrian sc->sc_stats.ast_tx_linear++; 266218065Sadrian m = m_collapse(m0, M_DONTWAIT, ATH_TXDESC); 267218065Sadrian if (m == NULL) { 268218065Sadrian ath_freetx(m0); 269218065Sadrian sc->sc_stats.ast_tx_nombuf++; 270218065Sadrian return ENOMEM; 271218065Sadrian } 272218065Sadrian m0 = m; 273218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 274218065Sadrian bf->bf_segs, &bf->bf_nseg, 275218065Sadrian BUS_DMA_NOWAIT); 276218065Sadrian if (error != 0) { 277218065Sadrian sc->sc_stats.ast_tx_busdma++; 278218065Sadrian ath_freetx(m0); 279218065Sadrian return error; 280218065Sadrian } 281218065Sadrian KASSERT(bf->bf_nseg <= ATH_TXDESC, 282218065Sadrian ("too many segments after defrag; nseg %u", bf->bf_nseg)); 283218065Sadrian } else if (bf->bf_nseg == 0) { /* null packet, discard */ 284218065Sadrian sc->sc_stats.ast_tx_nodata++; 285218065Sadrian ath_freetx(m0); 286218065Sadrian return EIO; 287218065Sadrian } 288218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", 289218065Sadrian __func__, m0, m0->m_pkthdr.len); 290218065Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 291218065Sadrian bf->bf_m = m0; 292218065Sadrian 293218065Sadrian return 0; 294218065Sadrian} 295218065Sadrian 296227360Sadrian/* 297227360Sadrian * Chain together segments+descriptors for a non-11n frame. 298227360Sadrian */ 299218065Sadrianstatic void 300227364Sadrianath_tx_chaindesclist(struct ath_softc *sc, struct ath_buf *bf) 301218065Sadrian{ 302218065Sadrian struct ath_hal *ah = sc->sc_ah; 303218065Sadrian struct ath_desc *ds, *ds0; 304218065Sadrian int i; 305218065Sadrian 306218065Sadrian /* 307218065Sadrian * Fillin the remainder of the descriptor info. 308218065Sadrian */ 309218065Sadrian ds0 = ds = bf->bf_desc; 310218065Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 311218065Sadrian ds->ds_data = bf->bf_segs[i].ds_addr; 312218065Sadrian if (i == bf->bf_nseg - 1) 313218065Sadrian ds->ds_link = 0; 314218065Sadrian else 315218065Sadrian ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 316218065Sadrian ath_hal_filltxdesc(ah, ds 317218065Sadrian , bf->bf_segs[i].ds_len /* segment length */ 318218065Sadrian , i == 0 /* first segment */ 319218065Sadrian , i == bf->bf_nseg - 1 /* last segment */ 320218065Sadrian , ds0 /* first descriptor */ 321218065Sadrian ); 322218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 323218065Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 324218065Sadrian __func__, i, ds->ds_link, ds->ds_data, 325218065Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 326227360Sadrian bf->bf_lastds = ds; 327218065Sadrian } 328233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 329218154Sadrian} 330218154Sadrian 331227364Sadrian/* 332227364Sadrian * Fill in the descriptor list for a aggregate subframe. 333227364Sadrian * 334227364Sadrian * The subframe is returned with the ds_link field in the last subframe 335227364Sadrian * pointing to 0. 336227364Sadrian */ 337218154Sadrianstatic void 338227364Sadrianath_tx_chaindesclist_subframe(struct ath_softc *sc, struct ath_buf *bf) 339218154Sadrian{ 340218154Sadrian struct ath_hal *ah = sc->sc_ah; 341227364Sadrian struct ath_desc *ds, *ds0; 342227364Sadrian int i; 343218154Sadrian 344227364Sadrian ds0 = ds = bf->bf_desc; 345218154Sadrian 346218065Sadrian /* 347227364Sadrian * There's no need to call ath_hal_setupfirsttxdesc here; 348227364Sadrian * That's only going to occur for the first frame in an aggregate. 349227364Sadrian */ 350227364Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 351227364Sadrian ds->ds_data = bf->bf_segs[i].ds_addr; 352227364Sadrian if (i == bf->bf_nseg - 1) 353227364Sadrian ds->ds_link = 0; 354227364Sadrian else 355227364Sadrian ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 356227364Sadrian 357227364Sadrian /* 358227364Sadrian * This performs the setup for an aggregate frame. 359227364Sadrian * This includes enabling the aggregate flags if needed. 360227364Sadrian */ 361227364Sadrian ath_hal_chaintxdesc(ah, ds, 362227364Sadrian bf->bf_state.bfs_pktlen, 363227364Sadrian bf->bf_state.bfs_hdrlen, 364227364Sadrian HAL_PKT_TYPE_AMPDU, /* forces aggregate bits to be set */ 365227364Sadrian bf->bf_state.bfs_keyix, 366227364Sadrian 0, /* cipher, calculated from keyix */ 367227364Sadrian bf->bf_state.bfs_ndelim, 368227364Sadrian bf->bf_segs[i].ds_len, /* segment length */ 369227364Sadrian i == 0, /* first segment */ 370233895Sadrian i == bf->bf_nseg - 1, /* last segment */ 371233895Sadrian bf->bf_next == NULL /* last sub-frame in aggr */ 372227364Sadrian ); 373227364Sadrian 374227364Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 375227364Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 376227364Sadrian __func__, i, ds->ds_link, ds->ds_data, 377227364Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 378227364Sadrian bf->bf_lastds = ds; 379233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 380233990Sadrian BUS_DMASYNC_PREWRITE); 381227364Sadrian } 382227364Sadrian} 383227364Sadrian 384227364Sadrian/* 385227364Sadrian * Setup segments+descriptors for an 11n aggregate. 386227364Sadrian * bf_first is the first buffer in the aggregate. 387227364Sadrian * The descriptor list must already been linked together using 388227364Sadrian * bf->bf_next. 389227364Sadrian */ 390227364Sadrianstatic void 391227364Sadrianath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first) 392227364Sadrian{ 393227364Sadrian struct ath_buf *bf, *bf_prev = NULL; 394227364Sadrian 395227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n", 396227364Sadrian __func__, bf_first->bf_state.bfs_nframes, 397227364Sadrian bf_first->bf_state.bfs_al); 398227364Sadrian 399227364Sadrian /* 400227364Sadrian * Setup all descriptors of all subframes. 401227364Sadrian */ 402227364Sadrian bf = bf_first; 403227364Sadrian while (bf != NULL) { 404227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 405227364Sadrian "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n", 406227364Sadrian __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen, 407227364Sadrian SEQNO(bf->bf_state.bfs_seqno)); 408227364Sadrian 409227364Sadrian /* Sub-frame setup */ 410227364Sadrian ath_tx_chaindesclist_subframe(sc, bf); 411227364Sadrian 412227364Sadrian /* 413227364Sadrian * Link the last descriptor of the previous frame 414227364Sadrian * to the beginning descriptor of this frame. 415227364Sadrian */ 416227364Sadrian if (bf_prev != NULL) 417227364Sadrian bf_prev->bf_lastds->ds_link = bf->bf_daddr; 418227364Sadrian 419227364Sadrian /* Save a copy so we can link the next descriptor in */ 420227364Sadrian bf_prev = bf; 421227364Sadrian bf = bf->bf_next; 422227364Sadrian } 423227364Sadrian 424227364Sadrian /* 425227364Sadrian * Setup first descriptor of first frame. 426227364Sadrian * chaintxdesc() overwrites the descriptor entries; 427227364Sadrian * setupfirsttxdesc() merges in things. 428227364Sadrian * Otherwise various fields aren't set correctly (eg flags). 429227364Sadrian */ 430227364Sadrian ath_hal_setupfirsttxdesc(sc->sc_ah, 431227364Sadrian bf_first->bf_desc, 432227364Sadrian bf_first->bf_state.bfs_al, 433233966Sadrian bf_first->bf_state.bfs_txflags | HAL_TXDESC_INTREQ, 434227364Sadrian bf_first->bf_state.bfs_txpower, 435227364Sadrian bf_first->bf_state.bfs_txrate0, 436227364Sadrian bf_first->bf_state.bfs_try0, 437227364Sadrian bf_first->bf_state.bfs_txantenna, 438227364Sadrian bf_first->bf_state.bfs_ctsrate, 439227364Sadrian bf_first->bf_state.bfs_ctsduration); 440227364Sadrian 441227364Sadrian /* 442227364Sadrian * Setup the last descriptor in the list. 443227364Sadrian * bf_prev points to the last; bf is NULL here. 444227364Sadrian */ 445229949Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_desc, 446229949Sadrian bf_first->bf_desc); 447227364Sadrian 448227364Sadrian /* 449227364Sadrian * Set the first descriptor bf_lastds field to point to 450227364Sadrian * the last descriptor in the last subframe, that's where 451227364Sadrian * the status update will occur. 452227364Sadrian */ 453227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 454227364Sadrian 455227364Sadrian /* 456227364Sadrian * And bf_last in the first descriptor points to the end of 457227364Sadrian * the aggregate list. 458227364Sadrian */ 459227364Sadrian bf_first->bf_last = bf_prev; 460227364Sadrian 461227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 462227364Sadrian} 463227364Sadrian 464227364Sadrianstatic void 465227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 466227364Sadrian struct ath_buf *bf) 467227364Sadrian{ 468227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 469227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 470227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 471227364Sadrian if (txq->axq_link != NULL) { 472227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 473227364Sadrian struct ieee80211_frame *wh; 474227364Sadrian 475227364Sadrian /* mark previous frame */ 476227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 477227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 478227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 479227364Sadrian BUS_DMASYNC_PREWRITE); 480227364Sadrian 481227364Sadrian /* link descriptor */ 482227364Sadrian *txq->axq_link = bf->bf_daddr; 483227364Sadrian } 484227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 485227364Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 486227364Sadrian} 487227364Sadrian 488227364Sadrian/* 489227364Sadrian * Hand-off packet to a hardware queue. 490227364Sadrian */ 491227364Sadrianstatic void 492229949Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, 493229949Sadrian struct ath_buf *bf) 494227364Sadrian{ 495227364Sadrian struct ath_hal *ah = sc->sc_ah; 496227364Sadrian 497227364Sadrian /* 498218065Sadrian * Insert the frame on the outbound list and pass it on 499218065Sadrian * to the hardware. Multicast frames buffered for power 500218065Sadrian * save stations and transmit from the CAB queue are stored 501218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 502218065Sadrian * the SWBA handler since frames only go out on DTIM and 503218065Sadrian * to avoid possible races. 504218065Sadrian */ 505227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 506218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 507227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 508227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 509227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 510227364Sadrian 511227651Sadrian#if 0 512227651Sadrian /* 513227651Sadrian * This causes a LOR. Find out where the PCU lock is being 514227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 515227651Sadrian * be occuring. 516227651Sadrian */ 517227651Sadrian ATH_PCU_LOCK(sc); 518227651Sadrian if (sc->sc_inreset_cnt) { 519227651Sadrian ATH_PCU_UNLOCK(sc); 520227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 521227651Sadrian "%s: called with sc_in_reset != 0\n", 522227651Sadrian __func__); 523227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 524227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 525227651Sadrian __func__, txq->axq_qnum, 526227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 527227651Sadrian txq->axq_depth); 528227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 529227651Sadrian if (bf->bf_state.bfs_aggr) 530227651Sadrian txq->axq_aggr_depth++; 531227651Sadrian /* 532227651Sadrian * There's no need to update axq_link; the hardware 533227651Sadrian * is in reset and once the reset is complete, any 534227651Sadrian * non-empty queues will simply have DMA restarted. 535227651Sadrian */ 536227651Sadrian return; 537227651Sadrian } 538227651Sadrian ATH_PCU_UNLOCK(sc); 539227651Sadrian#endif 540227651Sadrian 541227364Sadrian /* For now, so not to generate whitespace diffs */ 542227364Sadrian if (1) { 543218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 544218065Sadrian int qbusy; 545218065Sadrian 546218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 547218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 548218065Sadrian if (txq->axq_link == NULL) { 549218065Sadrian /* 550218065Sadrian * Be careful writing the address to TXDP. If 551218065Sadrian * the tx q is enabled then this write will be 552218065Sadrian * ignored. Normally this is not an issue but 553218065Sadrian * when tdma is in use and the q is beacon gated 554218065Sadrian * this race can occur. If the q is busy then 555218065Sadrian * defer the work to later--either when another 556218065Sadrian * packet comes along or when we prepare a beacon 557218065Sadrian * frame at SWBA. 558218065Sadrian */ 559218065Sadrian if (!qbusy) { 560229949Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 561229949Sadrian bf->bf_daddr); 562218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 563218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 564218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 565218065Sadrian __func__, txq->axq_qnum, 566218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 567218065Sadrian txq->axq_depth); 568218065Sadrian } else { 569218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 570218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 571218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 572218065Sadrian txq->axq_qnum); 573218065Sadrian } 574218065Sadrian } else { 575218065Sadrian *txq->axq_link = bf->bf_daddr; 576218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 577218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 578218065Sadrian txq->axq_qnum, txq->axq_link, 579229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 580229949Sadrian txq->axq_depth); 581218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 582218065Sadrian /* 583218065Sadrian * The q was busy when we previously tried 584218065Sadrian * to write the address of the first buffer 585218065Sadrian * in the chain. Since it's not busy now 586218065Sadrian * handle this chore. We are certain the 587218065Sadrian * buffer at the front is the right one since 588218065Sadrian * axq_link is NULL only when the buffer list 589218065Sadrian * is/was empty. 590218065Sadrian */ 591218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 592227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 593218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 594218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 595218065Sadrian "%s: Q%u restarted\n", __func__, 596218065Sadrian txq->axq_qnum); 597218065Sadrian } 598218065Sadrian } 599218065Sadrian#else 600218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 601218065Sadrian if (txq->axq_link == NULL) { 602218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 603218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 604218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 605218065Sadrian __func__, txq->axq_qnum, 606218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 607218065Sadrian txq->axq_depth); 608218065Sadrian } else { 609218065Sadrian *txq->axq_link = bf->bf_daddr; 610218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 611218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 612218065Sadrian txq->axq_qnum, txq->axq_link, 613229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 614229949Sadrian txq->axq_depth); 615218065Sadrian } 616218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 617227360Sadrian if (bf->bf_state.bfs_aggr) 618227360Sadrian txq->axq_aggr_depth++; 619227360Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 620218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 621227364Sadrian } 622227364Sadrian} 623218065Sadrian 624227364Sadrian/* 625227364Sadrian * Restart TX DMA for the given TXQ. 626227364Sadrian * 627227364Sadrian * This must be called whether the queue is empty or not. 628227364Sadrian */ 629227364Sadrianvoid 630227364Sadrianath_txq_restart_dma(struct ath_softc *sc, struct ath_txq *txq) 631227364Sadrian{ 632227364Sadrian struct ath_hal *ah = sc->sc_ah; 633232707Sadrian struct ath_buf *bf, *bf_last; 634218065Sadrian 635227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 636227364Sadrian 637227364Sadrian /* This is always going to be cleared, empty or not */ 638227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 639227364Sadrian 640232707Sadrian /* XXX make this ATH_TXQ_FIRST */ 641227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 642232707Sadrian bf_last = ATH_TXQ_LAST(txq, axq_q_s); 643232707Sadrian 644227364Sadrian if (bf == NULL) 645227364Sadrian return; 646227364Sadrian 647227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 648232707Sadrian txq->axq_link = &bf_last->bf_lastds->ds_link; 649227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 650218065Sadrian} 651218065Sadrian 652227364Sadrian/* 653227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 654227364Sadrian * 655227364Sadrian * The relevant hardware txq should be locked. 656227364Sadrian */ 657227364Sadrianstatic void 658227364Sadrianath_tx_handoff(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf) 659227364Sadrian{ 660227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 661227364Sadrian 662227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 663227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 664227364Sadrian else 665227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 666227364Sadrian} 667227364Sadrian 668218154Sadrianstatic int 669218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 670229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 671229949Sadrian int *keyix) 672218154Sadrian{ 673233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 674233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 675233330Sadrian __func__, 676233330Sadrian *hdrlen, 677233330Sadrian *pktlen, 678233330Sadrian isfrag, 679233330Sadrian iswep, 680233330Sadrian m0); 681233330Sadrian 682218154Sadrian if (iswep) { 683218154Sadrian const struct ieee80211_cipher *cip; 684218154Sadrian struct ieee80211_key *k; 685218154Sadrian 686218154Sadrian /* 687218154Sadrian * Construct the 802.11 header+trailer for an encrypted 688218154Sadrian * frame. The only reason this can fail is because of an 689218154Sadrian * unknown or unsupported cipher/key type. 690218154Sadrian */ 691218154Sadrian k = ieee80211_crypto_encap(ni, m0); 692218154Sadrian if (k == NULL) { 693218154Sadrian /* 694218154Sadrian * This can happen when the key is yanked after the 695218154Sadrian * frame was queued. Just discard the frame; the 696218154Sadrian * 802.11 layer counts failures and provides 697218154Sadrian * debugging/diagnostics. 698218154Sadrian */ 699229949Sadrian return (0); 700218154Sadrian } 701218154Sadrian /* 702218154Sadrian * Adjust the packet + header lengths for the crypto 703218154Sadrian * additions and calculate the h/w key index. When 704218154Sadrian * a s/w mic is done the frame will have had any mic 705218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 706218154Sadrian * account for it. Otherwise we need to add it to the 707218154Sadrian * packet length. 708218154Sadrian */ 709218154Sadrian cip = k->wk_cipher; 710218154Sadrian (*hdrlen) += cip->ic_header; 711218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 712218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 713218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 714218154Sadrian (*pktlen) += cip->ic_miclen; 715218154Sadrian (*keyix) = k->wk_keyix; 716218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 717218154Sadrian /* 718218154Sadrian * Use station key cache slot, if assigned. 719218154Sadrian */ 720218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 721218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 722218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 723218154Sadrian } else 724218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 725218154Sadrian 726229949Sadrian return (1); 727218154Sadrian} 728218154Sadrian 729233989Sadrian/* 730233989Sadrian * Calculate whether interoperability protection is required for 731233989Sadrian * this frame. 732233989Sadrian * 733233989Sadrian * This requires the rate control information be filled in, 734233989Sadrian * as the protection requirement depends upon the current 735233989Sadrian * operating mode / PHY. 736233989Sadrian */ 737233989Sadrianstatic void 738233989Sadrianath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf) 739233989Sadrian{ 740233989Sadrian struct ieee80211_frame *wh; 741233989Sadrian uint8_t rix; 742233989Sadrian uint16_t flags; 743233989Sadrian int shortPreamble; 744233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 745233989Sadrian struct ifnet *ifp = sc->sc_ifp; 746233989Sadrian struct ieee80211com *ic = ifp->if_l2com; 747233989Sadrian 748233989Sadrian flags = bf->bf_state.bfs_txflags; 749233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 750233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 751233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 752233989Sadrian 753233989Sadrian /* 754233989Sadrian * If 802.11g protection is enabled, determine whether 755233989Sadrian * to use RTS/CTS or just CTS. Note that this is only 756233989Sadrian * done for OFDM unicast frames. 757233989Sadrian */ 758233989Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 759233989Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 760233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 761233989Sadrian bf->bf_state.bfs_doprot = 1; 762233989Sadrian /* XXX fragments must use CCK rates w/ protection */ 763233989Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 764233989Sadrian flags |= HAL_TXDESC_RTSENA; 765233989Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 766233989Sadrian flags |= HAL_TXDESC_CTSENA; 767233989Sadrian } 768233989Sadrian /* 769233989Sadrian * For frags it would be desirable to use the 770233989Sadrian * highest CCK rate for RTS/CTS. But stations 771233989Sadrian * farther away may detect it at a lower CCK rate 772233989Sadrian * so use the configured protection rate instead 773233989Sadrian * (for now). 774233989Sadrian */ 775233989Sadrian sc->sc_stats.ast_tx_protect++; 776233989Sadrian } 777233989Sadrian 778233989Sadrian /* 779233989Sadrian * If 11n protection is enabled and it's a HT frame, 780233989Sadrian * enable RTS. 781233989Sadrian * 782233989Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 783233989Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 784233989Sadrian * XXX indicates it's not a HT pure environment? 785233989Sadrian */ 786233989Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 787233989Sadrian rt->info[rix].phy == IEEE80211_T_HT && 788233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 789233989Sadrian flags |= HAL_TXDESC_RTSENA; 790233989Sadrian sc->sc_stats.ast_tx_htprotect++; 791233989Sadrian } 792233989Sadrian bf->bf_state.bfs_txflags = flags; 793233989Sadrian} 794233989Sadrian 795233989Sadrian/* 796233989Sadrian * Update the frame duration given the currently selected rate. 797233989Sadrian * 798233989Sadrian * This also updates the frame duration value, so it will require 799233989Sadrian * a DMA flush. 800233989Sadrian */ 801233989Sadrianstatic void 802233989Sadrianath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf) 803233989Sadrian{ 804233989Sadrian struct ieee80211_frame *wh; 805233989Sadrian uint8_t rix; 806233989Sadrian uint16_t flags; 807233989Sadrian int shortPreamble; 808233989Sadrian struct ath_hal *ah = sc->sc_ah; 809233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 810233989Sadrian int isfrag = bf->bf_m->m_flags & M_FRAG; 811233989Sadrian 812233989Sadrian flags = bf->bf_state.bfs_txflags; 813233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 814233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 815233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 816233989Sadrian 817233989Sadrian /* 818233989Sadrian * Calculate duration. This logically belongs in the 802.11 819233989Sadrian * layer but it lacks sufficient information to calculate it. 820233989Sadrian */ 821233989Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 822233989Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 823233989Sadrian u_int16_t dur; 824233989Sadrian if (shortPreamble) 825233989Sadrian dur = rt->info[rix].spAckDuration; 826233989Sadrian else 827233989Sadrian dur = rt->info[rix].lpAckDuration; 828233989Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 829233989Sadrian dur += dur; /* additional SIFS+ACK */ 830233989Sadrian KASSERT(bf->bf_m->m_nextpkt != NULL, ("no fragment")); 831233989Sadrian /* 832233989Sadrian * Include the size of next fragment so NAV is 833233989Sadrian * updated properly. The last fragment uses only 834233989Sadrian * the ACK duration 835233989Sadrian */ 836233989Sadrian dur += ath_hal_computetxtime(ah, rt, 837233989Sadrian bf->bf_m->m_nextpkt->m_pkthdr.len, 838233989Sadrian rix, shortPreamble); 839233989Sadrian } 840233989Sadrian if (isfrag) { 841233989Sadrian /* 842233989Sadrian * Force hardware to use computed duration for next 843233989Sadrian * fragment by disabling multi-rate retry which updates 844233989Sadrian * duration based on the multi-rate duration table. 845233989Sadrian */ 846233989Sadrian bf->bf_state.bfs_ismrr = 0; 847233989Sadrian bf->bf_state.bfs_try0 = ATH_TXMGTTRY; 848233989Sadrian /* XXX update bfs_rc[0].try? */ 849233989Sadrian } 850233989Sadrian 851233989Sadrian /* Update the duration field itself */ 852233989Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 853233989Sadrian } 854233989Sadrian} 855233989Sadrian 856218932Sadrianstatic uint8_t 857218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 858227364Sadrian int cix, int shortPreamble) 859218157Sadrian{ 860218932Sadrian uint8_t ctsrate; 861218932Sadrian 862218157Sadrian /* 863218157Sadrian * CTS transmit rate is derived from the transmit rate 864218157Sadrian * by looking in the h/w rate table. We must also factor 865218157Sadrian * in whether or not a short preamble is to be used. 866218157Sadrian */ 867218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 868218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 869218932Sadrian ctsrate = rt->info[cix].rateCode; 870218932Sadrian 871218932Sadrian /* XXX this should only matter for legacy rates */ 872218932Sadrian if (shortPreamble) 873218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 874218932Sadrian 875229949Sadrian return (ctsrate); 876218932Sadrian} 877218932Sadrian 878218932Sadrian/* 879218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 880218932Sadrian */ 881218932Sadrianstatic int 882218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 883218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 884218932Sadrian int flags) 885218932Sadrian{ 886218932Sadrian int ctsduration = 0; 887218932Sadrian 888218932Sadrian /* This mustn't be called for HT modes */ 889218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 890218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 891218932Sadrian __func__, rt->info[cix].rateCode); 892229949Sadrian return (-1); 893218932Sadrian } 894218932Sadrian 895218157Sadrian /* 896218157Sadrian * Compute the transmit duration based on the frame 897218157Sadrian * size and the size of an ACK frame. We call into the 898218157Sadrian * HAL to do the computation since it depends on the 899218157Sadrian * characteristics of the actual PHY being used. 900218157Sadrian * 901218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 902218157Sadrian * use the precalculated ACK durations. 903218157Sadrian */ 904218157Sadrian if (shortPreamble) { 905218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 906218932Sadrian ctsduration += rt->info[cix].spAckDuration; 907218932Sadrian ctsduration += ath_hal_computetxtime(ah, 908218157Sadrian rt, pktlen, rix, AH_TRUE); 909218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 910218932Sadrian ctsduration += rt->info[rix].spAckDuration; 911218157Sadrian } else { 912218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 913218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 914218932Sadrian ctsduration += ath_hal_computetxtime(ah, 915218157Sadrian rt, pktlen, rix, AH_FALSE); 916218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 917218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 918218157Sadrian } 919218932Sadrian 920229949Sadrian return (ctsduration); 921218157Sadrian} 922218157Sadrian 923227364Sadrian/* 924227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 925227364Sadrian * values. 926227364Sadrian * 927227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 928227364Sadrian * and cts duration must be re-calculated. 929227364Sadrian * 930227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 931227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 932227364Sadrian * 933227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 934227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 935227364Sadrian */ 936227364Sadrianstatic void 937227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 938218065Sadrian{ 939227364Sadrian uint16_t ctsduration = 0; 940227364Sadrian uint8_t ctsrate = 0; 941227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 942227364Sadrian uint8_t cix = 0; 943227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 944227364Sadrian 945227364Sadrian /* 946227364Sadrian * No RTS/CTS enabled? Don't bother. 947227364Sadrian */ 948233966Sadrian if ((bf->bf_state.bfs_txflags & 949227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 950227364Sadrian /* XXX is this really needed? */ 951227364Sadrian bf->bf_state.bfs_ctsrate = 0; 952227364Sadrian bf->bf_state.bfs_ctsduration = 0; 953227364Sadrian return; 954227364Sadrian } 955227364Sadrian 956227364Sadrian /* 957227364Sadrian * If protection is enabled, use the protection rix control 958227364Sadrian * rate. Otherwise use the rate0 control rate. 959227364Sadrian */ 960227364Sadrian if (bf->bf_state.bfs_doprot) 961227364Sadrian rix = sc->sc_protrix; 962227364Sadrian else 963227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 964227364Sadrian 965227364Sadrian /* 966227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 967227364Sadrian * use it. 968227364Sadrian */ 969227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 970227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 971227364Sadrian else 972227364Sadrian /* Control rate from above */ 973227364Sadrian cix = rt->info[rix].controlRate; 974227364Sadrian 975227364Sadrian /* Calculate the rtscts rate for the given cix */ 976227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 977227364Sadrian bf->bf_state.bfs_shpream); 978227364Sadrian 979227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 980227364Sadrian if (! ath_tx_is_11n(sc)) 981227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 982227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 983233966Sadrian rt, bf->bf_state.bfs_txflags); 984227364Sadrian 985227364Sadrian /* Squirrel away in ath_buf */ 986227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 987227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 988227364Sadrian 989227364Sadrian /* 990227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 991227364Sadrian * XXX TODO: only for pre-11n NICs. 992227364Sadrian */ 993227364Sadrian bf->bf_state.bfs_ismrr = 0; 994227364Sadrian bf->bf_state.bfs_try0 = 995227364Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 996227364Sadrian} 997227364Sadrian 998227364Sadrian/* 999227364Sadrian * Setup the descriptor chain for a normal or fast-frame 1000227364Sadrian * frame. 1001227364Sadrian */ 1002227364Sadrianstatic void 1003227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 1004227364Sadrian{ 1005227364Sadrian struct ath_desc *ds = bf->bf_desc; 1006227364Sadrian struct ath_hal *ah = sc->sc_ah; 1007227364Sadrian 1008227364Sadrian ath_hal_setuptxdesc(ah, ds 1009227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 1010227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 1011227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 1012227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 1013227364Sadrian , bf->bf_state.bfs_txrate0 1014227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 1015227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 1016227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 1017233966Sadrian , bf->bf_state.bfs_txflags /* flags */ 1018227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 1019227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 1020227364Sadrian ); 1021227364Sadrian 1022227364Sadrian /* 1023227364Sadrian * This will be overriden when the descriptor chain is written. 1024227364Sadrian */ 1025227364Sadrian bf->bf_lastds = ds; 1026227364Sadrian bf->bf_last = bf; 1027227364Sadrian 1028227364Sadrian /* XXX TODO: Setup descriptor chain */ 1029227364Sadrian} 1030227364Sadrian 1031227364Sadrian/* 1032227364Sadrian * Do a rate lookup. 1033227364Sadrian * 1034227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 1035227364Sadrian * Non-data frames and raw frames don't require it. 1036227364Sadrian * 1037227364Sadrian * This populates the primary and MRR entries; MRR values are 1038227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 1039227364Sadrian * pre-11n chipsets. 1040227364Sadrian * 1041227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 1042227364Sadrian * as they may depend upon the rate chosen. 1043227364Sadrian */ 1044227364Sadrianstatic void 1045227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 1046227364Sadrian{ 1047227364Sadrian uint8_t rate, rix; 1048227364Sadrian int try0; 1049227364Sadrian 1050227364Sadrian if (! bf->bf_state.bfs_doratelookup) 1051227364Sadrian return; 1052227364Sadrian 1053227364Sadrian /* Get rid of any previous state */ 1054227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1055227364Sadrian 1056227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 1057227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 1058227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 1059227364Sadrian 1060227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 1061227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1062227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 1063227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1064227364Sadrian 1065227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 1066227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 1067227364Sadrian bf->bf_state.bfs_rc); 1068227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 1069227364Sadrian 1070227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 1071227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 1072227364Sadrian bf->bf_state.bfs_try0 = try0; 1073227364Sadrian bf->bf_state.bfs_txrate0 = rate; 1074227364Sadrian} 1075227364Sadrian 1076227364Sadrian/* 1077227364Sadrian * Set the rate control fields in the given descriptor based on 1078227364Sadrian * the bf_state fields and node state. 1079227364Sadrian * 1080227364Sadrian * The bfs fields should already be set with the relevant rate 1081227364Sadrian * control information, including whether MRR is to be enabled. 1082227364Sadrian * 1083227364Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 1084227364Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 1085227364Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 1086227364Sadrian * unconditionally for 11n chips. These require the 11n rate 1087227364Sadrian * scenario to be set if MCS rates are enabled, so it's easier 1088227364Sadrian * to just always call it. The caller can then only set rates 2, 3 1089227364Sadrian * and 4 if multi-rate retry is needed. 1090227364Sadrian */ 1091227364Sadrianstatic void 1092227364Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 1093227364Sadrian struct ath_buf *bf) 1094227364Sadrian{ 1095227364Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 1096227364Sadrian 1097227364Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 1098227364Sadrian if (! bf->bf_state.bfs_ismrr) 1099227364Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 1100227364Sadrian 1101227364Sadrian /* 1102227364Sadrian * Always call - that way a retried descriptor will 1103227364Sadrian * have the MRR fields overwritten. 1104227364Sadrian * 1105227364Sadrian * XXX TODO: see if this is really needed - setting up 1106227364Sadrian * the first descriptor should set the MRR fields to 0 1107227364Sadrian * for us anyway. 1108227364Sadrian */ 1109227364Sadrian if (ath_tx_is_11n(sc)) { 1110227364Sadrian ath_buf_set_rate(sc, ni, bf); 1111227364Sadrian } else { 1112227364Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 1113227364Sadrian , rc[1].ratecode, rc[1].tries 1114227364Sadrian , rc[2].ratecode, rc[2].tries 1115227364Sadrian , rc[3].ratecode, rc[3].tries 1116227364Sadrian ); 1117227364Sadrian } 1118227364Sadrian} 1119227364Sadrian 1120227364Sadrian/* 1121227364Sadrian * Transmit the given frame to the hardware. 1122227364Sadrian * 1123227364Sadrian * The frame must already be setup; rate control must already have 1124227364Sadrian * been done. 1125227364Sadrian * 1126227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 1127227364Sadrian * it for this long when not doing software aggregation), later on 1128227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 1129227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 1130227364Sadrian */ 1131227364Sadrianstatic void 1132227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 1133227364Sadrian struct ath_buf *bf) 1134227364Sadrian{ 1135227364Sadrian 1136227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1137227364Sadrian 1138227364Sadrian /* Setup the descriptor before handoff */ 1139227364Sadrian ath_tx_do_ratelookup(sc, bf); 1140233989Sadrian ath_tx_calc_duration(sc, bf); 1141233989Sadrian ath_tx_calc_protection(sc, bf); 1142233989Sadrian ath_tx_set_rtscts(sc, bf); 1143227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1144227364Sadrian ath_tx_setds(sc, bf); 1145227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1146227364Sadrian ath_tx_chaindesclist(sc, bf); 1147227364Sadrian 1148227364Sadrian /* Hand off to hardware */ 1149227364Sadrian ath_tx_handoff(sc, txq, bf); 1150227364Sadrian} 1151227364Sadrian 1152227364Sadrian 1153227364Sadrian 1154227364Sadrianstatic int 1155227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1156234009Sadrian struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq) 1157227364Sadrian{ 1158218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1159218065Sadrian struct ath_hal *ah = sc->sc_ah; 1160218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1161218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1162218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1163218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1164227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1165227364Sadrian u_int8_t rix = 0, txrate = 0; 1166218065Sadrian struct ath_desc *ds; 1167218065Sadrian struct ieee80211_frame *wh; 1168227364Sadrian u_int subtype, flags; 1169218065Sadrian HAL_PKT_TYPE atype; 1170218065Sadrian const HAL_RATE_TABLE *rt; 1171218065Sadrian HAL_BOOL shortPreamble; 1172218065Sadrian struct ath_node *an; 1173218065Sadrian u_int pri; 1174218065Sadrian 1175236880Sadrian /* 1176236880Sadrian * To ensure that both sequence numbers and the CCMP PN handling 1177236880Sadrian * is "correct", make sure that the relevant TID queue is locked. 1178236880Sadrian * Otherwise the CCMP PN and seqno may appear out of order, causing 1179236880Sadrian * re-ordered frames to have out of order CCMP PN's, resulting 1180236880Sadrian * in many, many frame drops. 1181236880Sadrian */ 1182236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1183236880Sadrian 1184218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1185218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1186218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1187218065Sadrian isfrag = m0->m_flags & M_FRAG; 1188218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1189218065Sadrian /* 1190218065Sadrian * Packet length must not include any 1191218065Sadrian * pad bytes; deduct them here. 1192218065Sadrian */ 1193218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1194218065Sadrian 1195218154Sadrian /* Handle encryption twiddling if needed */ 1196227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1197227364Sadrian &pktlen, &keyix)) { 1198218154Sadrian ath_freetx(m0); 1199218154Sadrian return EIO; 1200218154Sadrian } 1201218065Sadrian 1202218154Sadrian /* packet header may have moved, reset our local pointer */ 1203218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1204218065Sadrian 1205218065Sadrian pktlen += IEEE80211_CRC_LEN; 1206218065Sadrian 1207218065Sadrian /* 1208218065Sadrian * Load the DMA map so any coalescing is done. This 1209218065Sadrian * also calculates the number of descriptors we need. 1210218065Sadrian */ 1211218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1212218065Sadrian if (error != 0) 1213218065Sadrian return error; 1214218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1215218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1216218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1217218065Sadrian 1218218065Sadrian /* setup descriptors */ 1219218065Sadrian ds = bf->bf_desc; 1220218065Sadrian rt = sc->sc_currates; 1221218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1222218065Sadrian 1223218065Sadrian /* 1224218065Sadrian * NB: the 802.11 layer marks whether or not we should 1225218065Sadrian * use short preamble based on the current mode and 1226218065Sadrian * negotiated parameters. 1227218065Sadrian */ 1228218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1229218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1230218065Sadrian shortPreamble = AH_TRUE; 1231218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1232218065Sadrian } else { 1233218065Sadrian shortPreamble = AH_FALSE; 1234218065Sadrian } 1235218065Sadrian 1236218065Sadrian an = ATH_NODE(ni); 1237218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1238218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1239218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1240218065Sadrian /* XXX use txparams instead of fixed values */ 1241218065Sadrian /* 1242218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1243218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1244218065Sadrian */ 1245218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1246218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1247218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1248218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1249218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1250218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1251218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1252218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1253218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1254218065Sadrian else 1255218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1256218065Sadrian rix = an->an_mgmtrix; 1257218065Sadrian txrate = rt->info[rix].rateCode; 1258218065Sadrian if (shortPreamble) 1259218065Sadrian txrate |= rt->info[rix].shortPreamble; 1260218065Sadrian try0 = ATH_TXMGTTRY; 1261218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1262218065Sadrian break; 1263218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1264218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1265218065Sadrian rix = an->an_mgmtrix; 1266218065Sadrian txrate = rt->info[rix].rateCode; 1267218065Sadrian if (shortPreamble) 1268218065Sadrian txrate |= rt->info[rix].shortPreamble; 1269218065Sadrian try0 = ATH_TXMGTTRY; 1270218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1271218065Sadrian break; 1272218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1273218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1274218065Sadrian /* 1275218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1276218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1277218065Sadrian * the rate control module for the rate to use. 1278218065Sadrian */ 1279218065Sadrian if (ismcast) { 1280218065Sadrian rix = an->an_mcastrix; 1281218065Sadrian txrate = rt->info[rix].rateCode; 1282218065Sadrian if (shortPreamble) 1283218065Sadrian txrate |= rt->info[rix].shortPreamble; 1284218065Sadrian try0 = 1; 1285218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1286218065Sadrian /* XXX? maybe always use long preamble? */ 1287218065Sadrian rix = an->an_mgmtrix; 1288218065Sadrian txrate = rt->info[rix].rateCode; 1289218065Sadrian if (shortPreamble) 1290218065Sadrian txrate |= rt->info[rix].shortPreamble; 1291218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1292218065Sadrian } else { 1293227364Sadrian /* 1294227364Sadrian * Do rate lookup on each TX, rather than using 1295227364Sadrian * the hard-coded TX information decided here. 1296227364Sadrian */ 1297227364Sadrian ismrr = 1; 1298227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1299218065Sadrian } 1300218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1301218065Sadrian flags |= HAL_TXDESC_NOACK; 1302218065Sadrian break; 1303218065Sadrian default: 1304218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1305218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1306218065Sadrian /* XXX statistic */ 1307218065Sadrian ath_freetx(m0); 1308218065Sadrian return EIO; 1309218065Sadrian } 1310218065Sadrian 1311237041Sadrian /* 1312237041Sadrian * There are two known scenarios where the frame AC doesn't match 1313237041Sadrian * what the destination TXQ is. 1314237041Sadrian * 1315237041Sadrian * + non-QoS frames (eg management?) that the net80211 stack has 1316237041Sadrian * assigned a higher AC to, but since it's a non-QoS TID, it's 1317237041Sadrian * being thrown into TID 16. TID 16 gets the AC_BE queue. 1318237041Sadrian * It's quite possible that management frames should just be 1319237041Sadrian * direct dispatched to hardware rather than go via the software 1320237041Sadrian * queue; that should be investigated in the future. There are 1321237041Sadrian * some specific scenarios where this doesn't make sense, mostly 1322237041Sadrian * surrounding ADDBA request/response - hence why that is special 1323237041Sadrian * cased. 1324237041Sadrian * 1325237041Sadrian * + Multicast frames going into the VAP mcast queue. That shows up 1326237041Sadrian * as "TXQ 11". 1327237041Sadrian * 1328237041Sadrian * This driver should eventually support separate TID and TXQ locking, 1329237041Sadrian * allowing for arbitrary AC frames to appear on arbitrary software 1330237041Sadrian * queues, being queued to the "correct" hardware queue when needed. 1331237041Sadrian */ 1332237041Sadrian#if 0 1333235750Sadrian if (txq != sc->sc_ac2q[pri]) { 1334235750Sadrian device_printf(sc->sc_dev, 1335235750Sadrian "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n", 1336235750Sadrian __func__, 1337235750Sadrian txq, 1338235750Sadrian txq->axq_qnum, 1339235750Sadrian pri, 1340235750Sadrian sc->sc_ac2q[pri], 1341235750Sadrian sc->sc_ac2q[pri]->axq_qnum); 1342235750Sadrian } 1343237041Sadrian#endif 1344235750Sadrian 1345218065Sadrian /* 1346218065Sadrian * Calculate miscellaneous flags. 1347218065Sadrian */ 1348218065Sadrian if (ismcast) { 1349218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1350218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1351218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1352218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1353218065Sadrian sc->sc_stats.ast_tx_rts++; 1354218065Sadrian } 1355218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1356218065Sadrian sc->sc_stats.ast_tx_noack++; 1357218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1358218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1359218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1360218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1361218065Sadrian sc->sc_stats.ast_tdma_ack++; 1362218065Sadrian ath_freetx(m0); 1363218065Sadrian return EIO; 1364218065Sadrian } 1365218065Sadrian#endif 1366218065Sadrian 1367218065Sadrian /* 1368227364Sadrian * Determine if a tx interrupt should be generated for 1369227364Sadrian * this descriptor. We take a tx interrupt to reap 1370227364Sadrian * descriptors when the h/w hits an EOL condition or 1371227364Sadrian * when the descriptor is specifically marked to generate 1372227364Sadrian * an interrupt. We periodically mark descriptors in this 1373227364Sadrian * way to insure timely replenishing of the supply needed 1374227364Sadrian * for sending frames. Defering interrupts reduces system 1375227364Sadrian * load and potentially allows more concurrent work to be 1376227364Sadrian * done but if done to aggressively can cause senders to 1377227364Sadrian * backup. 1378227364Sadrian * 1379227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1380227364Sadrian * dynamically through sysctl. 1381218065Sadrian */ 1382227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1383227364Sadrian txq->axq_intrcnt = 0; 1384227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1385227364Sadrian flags |= HAL_TXDESC_INTREQ; 1386227364Sadrian txq->axq_intrcnt = 0; 1387227364Sadrian } 1388218932Sadrian 1389227364Sadrian /* This point forward is actual TX bits */ 1390218065Sadrian 1391218065Sadrian /* 1392218065Sadrian * At this point we are committed to sending the frame 1393218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1394218065Sadrian * case this frame is part of frag chain. 1395218065Sadrian */ 1396218065Sadrian m0->m_nextpkt = NULL; 1397218065Sadrian 1398218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1399218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1400218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1401218065Sadrian 1402218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1403218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1404218065Sadrian 1405218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1406218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1407218065Sadrian if (iswep) 1408218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1409218065Sadrian if (isfrag) 1410218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1411218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1412218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1413218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1414218065Sadrian 1415218065Sadrian ieee80211_radiotap_tx(vap, m0); 1416218065Sadrian } 1417218065Sadrian 1418227364Sadrian /* Blank the legacy rate array */ 1419227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1420227364Sadrian 1421218065Sadrian /* 1422227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1423227364Sadrian * the rate scenario. 1424227364Sadrian */ 1425227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1426227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1427227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1428227364Sadrian 1429227364Sadrian /* Store the decided rate index values away */ 1430227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1431227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1432227364Sadrian bf->bf_state.bfs_atype = atype; 1433227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1434227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1435227364Sadrian bf->bf_state.bfs_try0 = try0; 1436227364Sadrian bf->bf_state.bfs_keyix = keyix; 1437227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1438233966Sadrian bf->bf_state.bfs_txflags = flags; 1439227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1440227364Sadrian 1441227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1442227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1443227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1444227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1445227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1446227364Sadrian 1447227364Sadrian return 0; 1448227364Sadrian} 1449227364Sadrian 1450227364Sadrian/* 1451227364Sadrian * Direct-dispatch the current frame to the hardware. 1452227364Sadrian * 1453227364Sadrian * This can be called by the net80211 code. 1454227364Sadrian * 1455227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1456227364Sadrian * XXX aggregate scheduler so its serialised? 1457227364Sadrian */ 1458227364Sadrianint 1459227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1460227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1461227364Sadrian{ 1462227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1463227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1464232764Sadrian int r = 0; 1465227364Sadrian u_int pri; 1466227364Sadrian int tid; 1467227364Sadrian struct ath_txq *txq; 1468227364Sadrian int ismcast; 1469227364Sadrian const struct ieee80211_frame *wh; 1470227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1471236872Sadrian ieee80211_seq seqno; 1472227364Sadrian uint8_t type, subtype; 1473227364Sadrian 1474227364Sadrian /* 1475227364Sadrian * Determine the target hardware queue. 1476218065Sadrian * 1477234009Sadrian * For multicast frames, the txq gets overridden appropriately 1478234009Sadrian * depending upon the state of PS. 1479227364Sadrian * 1480227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1481227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1482227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1483227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1484227364Sadrian * having a node TID queued to multiple hardware TXQs. 1485227364Sadrian * This may change in the future but would require some locking 1486227364Sadrian * fudgery. 1487218065Sadrian */ 1488227364Sadrian pri = ath_tx_getac(sc, m0); 1489227364Sadrian tid = ath_tx_gettid(sc, m0); 1490218065Sadrian 1491227364Sadrian txq = sc->sc_ac2q[pri]; 1492227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1493227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1494227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1495227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1496227364Sadrian 1497232764Sadrian /* 1498232764Sadrian * Enforce how deep the multicast queue can grow. 1499232764Sadrian * 1500232764Sadrian * XXX duplicated in ath_raw_xmit(). 1501232764Sadrian */ 1502232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1503232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1504232764Sadrian 1505232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1506232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1507232764Sadrian r = ENOBUFS; 1508232764Sadrian } 1509232764Sadrian 1510232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1511232764Sadrian 1512232764Sadrian if (r != 0) { 1513232764Sadrian m_freem(m0); 1514232764Sadrian return r; 1515232764Sadrian } 1516232764Sadrian } 1517232764Sadrian 1518227364Sadrian /* A-MPDU TX */ 1519227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1520227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1521227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1522227364Sadrian 1523236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1524236872Sadrian __func__, tid, pri, is_ampdu); 1525227364Sadrian 1526232753Sadrian /* 1527234009Sadrian * When servicing one or more stations in power-save mode 1528234009Sadrian * (or) if there is some mcast data waiting on the mcast 1529234009Sadrian * queue (to prevent out of order delivery) multicast frames 1530234009Sadrian * must be bufferd until after the beacon. 1531234009Sadrian * 1532234009Sadrian * TODO: we should lock the mcastq before we check the length. 1533232753Sadrian */ 1534234009Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1535227364Sadrian txq = &avp->av_mcastq; 1536227364Sadrian 1537227364Sadrian /* Do the generic frame setup */ 1538227364Sadrian /* XXX should just bzero the bf_state? */ 1539227364Sadrian bf->bf_state.bfs_dobaw = 0; 1540227364Sadrian 1541236880Sadrian /* 1542236880Sadrian * Acquire the TXQ lock early, so both the encap and seqno 1543236880Sadrian * are allocated together. 1544236880Sadrian */ 1545236880Sadrian ATH_TXQ_LOCK(txq); 1546236880Sadrian 1547227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1548236880Sadrian /* 1549236880Sadrian * Don't do it whilst pending; the net80211 layer still 1550236880Sadrian * assigns them. 1551236880Sadrian */ 1552227364Sadrian if (is_ampdu_tx) { 1553227364Sadrian /* 1554227364Sadrian * Always call; this function will 1555227364Sadrian * handle making sure that null data frames 1556227364Sadrian * don't get a sequence number from the current 1557227364Sadrian * TID and thus mess with the BAW. 1558227364Sadrian */ 1559236872Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1560236874Sadrian 1561236874Sadrian /* 1562236874Sadrian * Don't add QoS NULL frames to the BAW. 1563236874Sadrian */ 1564236872Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1565236872Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1566227364Sadrian bf->bf_state.bfs_dobaw = 1; 1567227364Sadrian } 1568218240Sadrian } 1569218240Sadrian 1570218065Sadrian /* 1571227364Sadrian * If needed, the sequence number has been assigned. 1572227364Sadrian * Squirrel it away somewhere easy to get to. 1573218065Sadrian */ 1574236872Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1575227364Sadrian 1576227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1577227364Sadrian if (is_ampdu_pending) 1578227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1579227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1580227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1581227364Sadrian 1582227364Sadrian /* This also sets up the DMA map */ 1583234009Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0, txq); 1584227364Sadrian 1585227364Sadrian if (r != 0) 1586236880Sadrian goto done; 1587227364Sadrian 1588227364Sadrian /* At this point m0 could have changed! */ 1589227364Sadrian m0 = bf->bf_m; 1590227364Sadrian 1591227364Sadrian#if 1 1592218065Sadrian /* 1593227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1594227364Sadrian * destination hardware queue. Don't bother software 1595227364Sadrian * queuing it. 1596218065Sadrian */ 1597227364Sadrian /* 1598227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1599227364Sadrian * destination hardware queue. Don't bother software 1600227364Sadrian * queuing it, as the TID will now be paused. 1601227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1602227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1603227364Sadrian * It queues directly to hardware because the TID is paused 1604227364Sadrian * at this point (and won't be unpaused until the BAR has 1605227364Sadrian * either been TXed successfully or max retries has been 1606227364Sadrian * reached.) 1607227364Sadrian */ 1608227364Sadrian if (txq == &avp->av_mcastq) { 1609235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1610233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1611227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1612227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1613227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1614235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1615227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1616227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1617227364Sadrian } else { 1618227364Sadrian /* add to software queue */ 1619235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1620233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1621227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1622227364Sadrian } 1623227364Sadrian#else 1624227364Sadrian /* 1625227364Sadrian * For now, since there's no software queue, 1626227364Sadrian * direct-dispatch to the hardware. 1627227364Sadrian */ 1628227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1629236880Sadrian#endif 1630236880Sadriandone: 1631227364Sadrian ATH_TXQ_UNLOCK(txq); 1632218065Sadrian 1633218065Sadrian return 0; 1634218065Sadrian} 1635218065Sadrian 1636218065Sadrianstatic int 1637218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1638218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1639218065Sadrian const struct ieee80211_bpf_params *params) 1640218065Sadrian{ 1641218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1642218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1643218065Sadrian struct ath_hal *ah = sc->sc_ah; 1644218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1645218065Sadrian int error, ismcast, ismrr; 1646218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1647227364Sadrian u_int8_t rix, txrate; 1648218065Sadrian struct ieee80211_frame *wh; 1649227364Sadrian u_int flags; 1650218065Sadrian HAL_PKT_TYPE atype; 1651218065Sadrian const HAL_RATE_TABLE *rt; 1652218065Sadrian struct ath_desc *ds; 1653218065Sadrian u_int pri; 1654227364Sadrian int o_tid = -1; 1655227364Sadrian int do_override; 1656218065Sadrian 1657218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1658218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1659218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1660218065Sadrian /* 1661218065Sadrian * Packet length must not include any 1662218065Sadrian * pad bytes; deduct them here. 1663218065Sadrian */ 1664218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1665218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1666218065Sadrian 1667227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1668227364Sadrian __func__, ismcast); 1669227364Sadrian 1670236880Sadrian pri = params->ibp_pri & 3; 1671236880Sadrian /* Override pri if the frame isn't a QoS one */ 1672236880Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1673236880Sadrian pri = ath_tx_getac(sc, m0); 1674236880Sadrian 1675236880Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1676236880Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1677236880Sadrian 1678236880Sadrian /* Map ADDBA to the correct priority */ 1679236880Sadrian if (do_override) { 1680236880Sadrian#if 0 1681236880Sadrian device_printf(sc->sc_dev, 1682236880Sadrian "%s: overriding tid %d pri %d -> %d\n", 1683236880Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1684236880Sadrian#endif 1685236880Sadrian pri = TID_TO_WME_AC(o_tid); 1686236880Sadrian } 1687236880Sadrian 1688236880Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1689236880Sadrian 1690218154Sadrian /* Handle encryption twiddling if needed */ 1691227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1692227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1693227364Sadrian &hdrlen, &pktlen, &keyix)) { 1694218154Sadrian ath_freetx(m0); 1695218154Sadrian return EIO; 1696218154Sadrian } 1697218154Sadrian /* packet header may have moved, reset our local pointer */ 1698218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1699218065Sadrian 1700227364Sadrian /* Do the generic frame setup */ 1701227364Sadrian /* XXX should just bzero the bf_state? */ 1702227364Sadrian bf->bf_state.bfs_dobaw = 0; 1703227364Sadrian 1704218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1705218065Sadrian if (error != 0) 1706218065Sadrian return error; 1707218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1708218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1709218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1710218065Sadrian 1711218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1712218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1713218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1714218065Sadrian flags |= HAL_TXDESC_RTSENA; 1715227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1716227364Sadrian /* XXX assume 11g/11n protection? */ 1717227364Sadrian bf->bf_state.bfs_doprot = 1; 1718218065Sadrian flags |= HAL_TXDESC_CTSENA; 1719227364Sadrian } 1720218065Sadrian /* XXX leave ismcast to injector? */ 1721218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1722218065Sadrian flags |= HAL_TXDESC_NOACK; 1723218065Sadrian 1724218065Sadrian rt = sc->sc_currates; 1725218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1726218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1727218065Sadrian txrate = rt->info[rix].rateCode; 1728218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1729218065Sadrian txrate |= rt->info[rix].shortPreamble; 1730218065Sadrian sc->sc_txrix = rix; 1731218065Sadrian try0 = params->ibp_try0; 1732218065Sadrian ismrr = (params->ibp_try1 != 0); 1733218065Sadrian txantenna = params->ibp_pri >> 2; 1734218065Sadrian if (txantenna == 0) /* XXX? */ 1735218065Sadrian txantenna = sc->sc_txantenna; 1736218157Sadrian 1737227364Sadrian /* 1738227364Sadrian * Since ctsrate is fixed, store it away for later 1739227364Sadrian * use when the descriptor fields are being set. 1740227364Sadrian */ 1741227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1742227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1743218157Sadrian 1744218065Sadrian /* 1745218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1746218065Sadrian * set the sequence number, duration, etc. 1747218065Sadrian */ 1748218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1749218065Sadrian 1750218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1751218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1752218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1753218065Sadrian 1754218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1755218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1756218065Sadrian 1757218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1758218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1759218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1760218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1761218065Sadrian if (m0->m_flags & M_FRAG) 1762218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1763218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1764218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1765218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1766218065Sadrian 1767218065Sadrian ieee80211_radiotap_tx(vap, m0); 1768218065Sadrian } 1769218065Sadrian 1770218065Sadrian /* 1771218065Sadrian * Formulate first tx descriptor with tx controls. 1772218065Sadrian */ 1773218065Sadrian ds = bf->bf_desc; 1774218065Sadrian /* XXX check return value? */ 1775227364Sadrian 1776227364Sadrian /* Store the decided rate index values away */ 1777227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1778227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1779227364Sadrian bf->bf_state.bfs_atype = atype; 1780227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1781227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1782227364Sadrian bf->bf_state.bfs_try0 = try0; 1783227364Sadrian bf->bf_state.bfs_keyix = keyix; 1784227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1785233966Sadrian bf->bf_state.bfs_txflags = flags; 1786227364Sadrian bf->bf_state.bfs_shpream = 1787227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1788218065Sadrian 1789227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1790227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1791227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1792227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1793218240Sadrian 1794227364Sadrian /* Blank the legacy rate array */ 1795227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1796218240Sadrian 1797227364Sadrian bf->bf_state.bfs_rc[0].rix = 1798227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1799227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1800227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1801227364Sadrian 1802227364Sadrian if (ismrr) { 1803227364Sadrian int rix; 1804227364Sadrian 1805227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1806227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1807227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1808227364Sadrian 1809227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1810227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1811227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1812227364Sadrian 1813227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1814227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1815227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1816218065Sadrian } 1817227364Sadrian /* 1818227364Sadrian * All the required rate control decisions have been made; 1819227364Sadrian * fill in the rc flags. 1820227364Sadrian */ 1821227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1822218065Sadrian 1823227364Sadrian /* NB: no buffered multicast in power save support */ 1824227364Sadrian 1825227364Sadrian /* 1826227364Sadrian * If we're overiding the ADDBA destination, dump directly 1827227364Sadrian * into the hardware queue, right after any pending 1828227364Sadrian * frames to that node are. 1829227364Sadrian */ 1830227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1831227364Sadrian __func__, do_override); 1832227364Sadrian 1833227364Sadrian if (do_override) { 1834227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1835227364Sadrian } else { 1836227364Sadrian /* Queue to software queue */ 1837227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1838227364Sadrian } 1839236880Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1840227364Sadrian 1841218065Sadrian return 0; 1842218065Sadrian} 1843218065Sadrian 1844227364Sadrian/* 1845227364Sadrian * Send a raw frame. 1846227364Sadrian * 1847227364Sadrian * This can be called by net80211. 1848227364Sadrian */ 1849218065Sadrianint 1850218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1851218065Sadrian const struct ieee80211_bpf_params *params) 1852218065Sadrian{ 1853218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1854218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1855218065Sadrian struct ath_softc *sc = ifp->if_softc; 1856218065Sadrian struct ath_buf *bf; 1857232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1858232764Sadrian int error = 0; 1859218065Sadrian 1860227651Sadrian ATH_PCU_LOCK(sc); 1861227651Sadrian if (sc->sc_inreset_cnt > 0) { 1862227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 1863227651Sadrian __func__); 1864227651Sadrian error = EIO; 1865227651Sadrian ATH_PCU_UNLOCK(sc); 1866227651Sadrian goto bad0; 1867227651Sadrian } 1868227651Sadrian sc->sc_txstart_cnt++; 1869227651Sadrian ATH_PCU_UNLOCK(sc); 1870227651Sadrian 1871218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 1872218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 1873218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 1874218065Sadrian "!running" : "invalid"); 1875218065Sadrian m_freem(m); 1876218065Sadrian error = ENETDOWN; 1877218065Sadrian goto bad; 1878218065Sadrian } 1879232764Sadrian 1880218065Sadrian /* 1881232764Sadrian * Enforce how deep the multicast queue can grow. 1882232764Sadrian * 1883232764Sadrian * XXX duplicated in ath_tx_start(). 1884232764Sadrian */ 1885232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1886232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1887232764Sadrian 1888232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1889232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1890232764Sadrian error = ENOBUFS; 1891232764Sadrian } 1892232764Sadrian 1893232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1894232764Sadrian 1895232764Sadrian if (error != 0) { 1896232764Sadrian m_freem(m); 1897232764Sadrian goto bad; 1898232764Sadrian } 1899232764Sadrian } 1900232764Sadrian 1901232764Sadrian /* 1902218065Sadrian * Grab a TX buffer and associated resources. 1903218065Sadrian */ 1904237000Sadrian bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 1905218065Sadrian if (bf == NULL) { 1906218065Sadrian sc->sc_stats.ast_tx_nobuf++; 1907218065Sadrian m_freem(m); 1908218065Sadrian error = ENOBUFS; 1909218065Sadrian goto bad; 1910218065Sadrian } 1911218065Sadrian 1912218065Sadrian if (params == NULL) { 1913218065Sadrian /* 1914218065Sadrian * Legacy path; interpret frame contents to decide 1915218065Sadrian * precisely how to send the frame. 1916218065Sadrian */ 1917218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 1918218065Sadrian error = EIO; /* XXX */ 1919218065Sadrian goto bad2; 1920218065Sadrian } 1921218065Sadrian } else { 1922218065Sadrian /* 1923218065Sadrian * Caller supplied explicit parameters to use in 1924218065Sadrian * sending the frame. 1925218065Sadrian */ 1926218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 1927218065Sadrian error = EIO; /* XXX */ 1928218065Sadrian goto bad2; 1929218065Sadrian } 1930218065Sadrian } 1931218065Sadrian sc->sc_wd_timer = 5; 1932218065Sadrian ifp->if_opackets++; 1933218065Sadrian sc->sc_stats.ast_tx_raw++; 1934218065Sadrian 1935227651Sadrian ATH_PCU_LOCK(sc); 1936227651Sadrian sc->sc_txstart_cnt--; 1937227651Sadrian ATH_PCU_UNLOCK(sc); 1938227651Sadrian 1939218065Sadrian return 0; 1940218065Sadrianbad2: 1941218065Sadrian ATH_TXBUF_LOCK(sc); 1942236993Sadrian ath_returnbuf_head(sc, bf); 1943218065Sadrian ATH_TXBUF_UNLOCK(sc); 1944218065Sadrianbad: 1945227651Sadrian ATH_PCU_LOCK(sc); 1946227651Sadrian sc->sc_txstart_cnt--; 1947227651Sadrian ATH_PCU_UNLOCK(sc); 1948227651Sadrianbad0: 1949218065Sadrian ifp->if_oerrors++; 1950218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 1951218065Sadrian ieee80211_free_node(ni); 1952227651Sadrian 1953218065Sadrian return error; 1954218065Sadrian} 1955227364Sadrian 1956227364Sadrian/* Some helper functions */ 1957227364Sadrian 1958227364Sadrian/* 1959227364Sadrian * ADDBA (and potentially others) need to be placed in the same 1960227364Sadrian * hardware queue as the TID/node it's relating to. This is so 1961227364Sadrian * it goes out after any pending non-aggregate frames to the 1962227364Sadrian * same node/TID. 1963227364Sadrian * 1964227364Sadrian * If this isn't done, the ADDBA can go out before the frames 1965227364Sadrian * queued in hardware. Even though these frames have a sequence 1966227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 1967227364Sadrian * no frames whose sequence numbers are after the ADDBA should 1968227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 1969227364Sadrian * will simply drop them as being out of the BAW. 1970227364Sadrian * 1971227364Sadrian * The frames can't be appended to the TID software queue - it'll 1972227364Sadrian * never be sent out. So these frames have to be directly 1973227364Sadrian * dispatched to the hardware, rather than queued in software. 1974227364Sadrian * So if this function returns true, the TXQ has to be 1975227364Sadrian * overridden and it has to be directly dispatched. 1976227364Sadrian * 1977227364Sadrian * It's a dirty hack, but someone's gotta do it. 1978227364Sadrian */ 1979227364Sadrian 1980227364Sadrian/* 1981227364Sadrian * XXX doesn't belong here! 1982227364Sadrian */ 1983227364Sadrianstatic int 1984227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 1985227364Sadrian{ 1986227364Sadrian /* Type: Management frame? */ 1987227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 1988227364Sadrian IEEE80211_FC0_TYPE_MGT) 1989227364Sadrian return 0; 1990227364Sadrian 1991227364Sadrian /* Subtype: Action frame? */ 1992227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 1993227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 1994227364Sadrian return 0; 1995227364Sadrian 1996227364Sadrian return 1; 1997227364Sadrian} 1998227364Sadrian 1999227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 2000227364Sadrian/* 2001227364Sadrian * Return an alternate TID for ADDBA request frames. 2002227364Sadrian * 2003227364Sadrian * Yes, this likely should be done in the net80211 layer. 2004227364Sadrian */ 2005227364Sadrianstatic int 2006227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 2007227364Sadrian struct ieee80211_node *ni, 2008227364Sadrian struct mbuf *m0, int *tid) 2009227364Sadrian{ 2010227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 2011227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 2012227364Sadrian uint8_t *frm; 2013227364Sadrian uint16_t baparamset; 2014227364Sadrian 2015227364Sadrian /* Not action frame? Bail */ 2016227364Sadrian if (! ieee80211_is_action(wh)) 2017227364Sadrian return 0; 2018227364Sadrian 2019227364Sadrian /* XXX Not needed for frames we send? */ 2020227364Sadrian#if 0 2021227364Sadrian /* Correct length? */ 2022227364Sadrian if (! ieee80211_parse_action(ni, m)) 2023227364Sadrian return 0; 2024227364Sadrian#endif 2025227364Sadrian 2026227364Sadrian /* Extract out action frame */ 2027227364Sadrian frm = (u_int8_t *)&wh[1]; 2028227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 2029227364Sadrian 2030227364Sadrian /* Not ADDBA? Bail */ 2031227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 2032227364Sadrian return 0; 2033227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 2034227364Sadrian return 0; 2035227364Sadrian 2036227364Sadrian /* Extract TID, return it */ 2037227364Sadrian baparamset = le16toh(ia->rq_baparamset); 2038227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 2039227364Sadrian 2040227364Sadrian return 1; 2041227364Sadrian} 2042227364Sadrian#undef MS 2043227364Sadrian 2044227364Sadrian/* Per-node software queue operations */ 2045227364Sadrian 2046227364Sadrian/* 2047227364Sadrian * Add the current packet to the given BAW. 2048227364Sadrian * It is assumed that the current packet 2049227364Sadrian * 2050227364Sadrian * + fits inside the BAW; 2051227364Sadrian * + already has had a sequence number allocated. 2052227364Sadrian * 2053227364Sadrian * Since the BAW status may be modified by both the ath task and 2054227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2055227364Sadrian */ 2056227364Sadrianvoid 2057227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 2058227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 2059227364Sadrian{ 2060227364Sadrian int index, cindex; 2061227364Sadrian struct ieee80211_tx_ampdu *tap; 2062227364Sadrian 2063227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2064236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2065227364Sadrian 2066227364Sadrian if (bf->bf_state.bfs_isretried) 2067227364Sadrian return; 2068227364Sadrian 2069236886Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2070236886Sadrian 2071236880Sadrian if (! bf->bf_state.bfs_dobaw) { 2072236880Sadrian device_printf(sc->sc_dev, 2073236880Sadrian "%s: dobaw=0, seqno=%d, window %d:%d\n", 2074236880Sadrian __func__, 2075236880Sadrian SEQNO(bf->bf_state.bfs_seqno), 2076236880Sadrian tap->txa_start, 2077236880Sadrian tap->txa_wnd); 2078236880Sadrian } 2079236880Sadrian 2080227364Sadrian if (bf->bf_state.bfs_addedbaw) 2081227364Sadrian device_printf(sc->sc_dev, 2082236872Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 2083229949Sadrian "baw head=%d tail=%d\n", 2084236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2085229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2086229949Sadrian tid->baw_tail); 2087227364Sadrian 2088227364Sadrian /* 2089236880Sadrian * Verify that the given sequence number is not outside of the 2090236880Sadrian * BAW. Complain loudly if that's the case. 2091236880Sadrian */ 2092236880Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2093236880Sadrian SEQNO(bf->bf_state.bfs_seqno))) { 2094236880Sadrian device_printf(sc->sc_dev, 2095236880Sadrian "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; " 2096236880Sadrian "baw head=%d tail=%d\n", 2097236880Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2098236880Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2099236880Sadrian tid->baw_tail); 2100236880Sadrian } 2101236880Sadrian 2102236880Sadrian /* 2103227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2104227364Sadrian * the txa state contains the current baw start. 2105227364Sadrian */ 2106227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2107227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2108227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2109236872Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2110229949Sadrian "baw head=%d tail=%d\n", 2111236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2112229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2113229949Sadrian tid->baw_tail); 2114227364Sadrian 2115227364Sadrian 2116227364Sadrian#if 0 2117227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2118227364Sadrian#endif 2119227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2120227364Sadrian device_printf(sc->sc_dev, 2121227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2122227364Sadrian "head=%d, tail=%d)\n", 2123227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2124227364Sadrian device_printf(sc->sc_dev, 2125227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2126227364Sadrian __func__, 2127227364Sadrian tid->tx_buf[cindex], 2128227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2129227364Sadrian bf, 2130227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2131227364Sadrian ); 2132227364Sadrian } 2133227364Sadrian tid->tx_buf[cindex] = bf; 2134227364Sadrian 2135229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2136229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2137227364Sadrian tid->baw_tail = cindex; 2138227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2139227364Sadrian } 2140227364Sadrian} 2141227364Sadrian 2142227364Sadrian/* 2143227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2144227398Sadrian * 2145227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2146227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2147227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2148227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2149227398Sadrian * tracking array to maintain consistency. 2150227398Sadrian */ 2151227398Sadrianstatic void 2152227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2153227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2154227398Sadrian{ 2155227398Sadrian int index, cindex; 2156227398Sadrian struct ieee80211_tx_ampdu *tap; 2157227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2158227398Sadrian 2159227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2160236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2161227398Sadrian 2162227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2163227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2164227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2165227398Sadrian 2166227398Sadrian /* 2167227398Sadrian * Just warn for now; if it happens then we should find out 2168227398Sadrian * about it. It's highly likely the aggregation session will 2169227398Sadrian * soon hang. 2170227398Sadrian */ 2171227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2172227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2173227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2174227398Sadrian __func__); 2175227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2176227398Sadrian __func__, 2177227398Sadrian old_bf->bf_state.bfs_seqno, 2178227398Sadrian new_bf->bf_state.bfs_seqno); 2179227398Sadrian } 2180227398Sadrian 2181227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2182227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2183227398Sadrian " has m BA session may hang.\n", 2184227398Sadrian __func__); 2185227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2186227398Sadrian __func__, 2187227398Sadrian old_bf, new_bf); 2188227398Sadrian } 2189227398Sadrian 2190227398Sadrian tid->tx_buf[cindex] = new_bf; 2191227398Sadrian} 2192227398Sadrian 2193227398Sadrian/* 2194227364Sadrian * seq_start - left edge of BAW 2195227364Sadrian * seq_next - current/next sequence number to allocate 2196227364Sadrian * 2197227364Sadrian * Since the BAW status may be modified by both the ath task and 2198227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2199227364Sadrian */ 2200227364Sadrianstatic void 2201227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2202227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2203227364Sadrian{ 2204227364Sadrian int index, cindex; 2205227364Sadrian struct ieee80211_tx_ampdu *tap; 2206227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2207227364Sadrian 2208227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2209236879Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2210227364Sadrian 2211227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2212227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2213227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2214227364Sadrian 2215227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2216236872Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2217229949Sadrian "baw head=%d, tail=%d\n", 2218236872Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2219227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2220227364Sadrian 2221227364Sadrian /* 2222227364Sadrian * If this occurs then we have a big problem - something else 2223227364Sadrian * has slid tap->txa_start along without updating the BAW 2224227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2225227364Sadrian * completely busted. 2226227364Sadrian * 2227227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2228227364Sadrian * it's quite possible that a cloned buffer is making its way 2229227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2230227364Sadrian */ 2231227364Sadrian if (tid->tx_buf[cindex] != bf) { 2232227364Sadrian device_printf(sc->sc_dev, 2233227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2234227364Sadrian __func__, 2235227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2236227364Sadrian tid->tx_buf[cindex], 2237227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2238227364Sadrian } 2239227364Sadrian 2240227364Sadrian tid->tx_buf[cindex] = NULL; 2241227364Sadrian 2242229949Sadrian while (tid->baw_head != tid->baw_tail && 2243229949Sadrian !tid->tx_buf[tid->baw_head]) { 2244227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2245227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2246227364Sadrian } 2247229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2248229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2249227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2250227364Sadrian} 2251227364Sadrian 2252227364Sadrian/* 2253227364Sadrian * Mark the current node/TID as ready to TX. 2254227364Sadrian * 2255227364Sadrian * This is done to make it easy for the software scheduler to 2256227364Sadrian * find which nodes have data to send. 2257227364Sadrian * 2258227364Sadrian * The TXQ lock must be held. 2259227364Sadrian */ 2260227364Sadrianstatic void 2261227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2262227364Sadrian{ 2263227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2264227364Sadrian 2265227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2266227364Sadrian 2267227364Sadrian if (tid->paused) 2268227364Sadrian return; /* paused, can't schedule yet */ 2269227364Sadrian 2270227364Sadrian if (tid->sched) 2271227364Sadrian return; /* already scheduled */ 2272227364Sadrian 2273227364Sadrian tid->sched = 1; 2274227364Sadrian 2275227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2276227364Sadrian} 2277227364Sadrian 2278227364Sadrian/* 2279227364Sadrian * Mark the current node as no longer needing to be polled for 2280227364Sadrian * TX packets. 2281227364Sadrian * 2282227364Sadrian * The TXQ lock must be held. 2283227364Sadrian */ 2284227364Sadrianstatic void 2285227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2286227364Sadrian{ 2287227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2288227364Sadrian 2289227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2290227364Sadrian 2291227364Sadrian if (tid->sched == 0) 2292227364Sadrian return; 2293227364Sadrian 2294227364Sadrian tid->sched = 0; 2295227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2296227364Sadrian} 2297227364Sadrian 2298227364Sadrian/* 2299227364Sadrian * Assign a sequence number manually to the given frame. 2300227364Sadrian * 2301227364Sadrian * This should only be called for A-MPDU TX frames. 2302227364Sadrian */ 2303236872Sadrianstatic ieee80211_seq 2304227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2305227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2306227364Sadrian{ 2307227364Sadrian struct ieee80211_frame *wh; 2308227364Sadrian int tid, pri; 2309227364Sadrian ieee80211_seq seqno; 2310227364Sadrian uint8_t subtype; 2311227364Sadrian 2312227364Sadrian /* TID lookup */ 2313227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2314227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2315227364Sadrian tid = WME_AC_TO_TID(pri); 2316236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2317236872Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2318227364Sadrian 2319227364Sadrian /* XXX Is it a control frame? Ignore */ 2320227364Sadrian 2321227364Sadrian /* Does the packet require a sequence number? */ 2322227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2323227364Sadrian return -1; 2324227364Sadrian 2325236880Sadrian ATH_TID_LOCK_ASSERT(sc, &(ATH_NODE(ni)->an_tid[tid])); 2326236880Sadrian 2327227364Sadrian /* 2328227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2329227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2330227364Sadrian * 2331227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2332227364Sadrian * data frame sequence number in the aggregation state updates, so 2333227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2334227364Sadrian * RX side. 2335227364Sadrian */ 2336227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2337227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2338236880Sadrian /* XXX no locking for this TID? This is a bit of a problem. */ 2339227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2340227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2341227364Sadrian } else { 2342227364Sadrian /* Manually assign sequence number */ 2343227364Sadrian seqno = ni->ni_txseqs[tid]; 2344227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2345227364Sadrian } 2346227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2347227364Sadrian M_SEQNO_SET(m0, seqno); 2348227364Sadrian 2349227364Sadrian /* Return so caller can do something with it if needed */ 2350236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2351227364Sadrian return seqno; 2352227364Sadrian} 2353227364Sadrian 2354227364Sadrian/* 2355227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2356227364Sadrian * If the frame is out of BAW, queue. 2357227364Sadrian * Otherwise, schedule it as a single frame. 2358227364Sadrian */ 2359227364Sadrianstatic void 2360227364Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, struct ath_buf *bf) 2361227364Sadrian{ 2362227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2363227364Sadrian struct ath_txq *txq = bf->bf_state.bfs_txq; 2364227364Sadrian struct ieee80211_tx_ampdu *tap; 2365227364Sadrian 2366227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2367236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2368227364Sadrian 2369227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2370227364Sadrian 2371227364Sadrian /* paused? queue */ 2372227364Sadrian if (tid->paused) { 2373236876Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2374233480Sadrian /* XXX don't sched - we're paused! */ 2375227364Sadrian return; 2376227364Sadrian } 2377227364Sadrian 2378227364Sadrian /* outside baw? queue */ 2379227364Sadrian if (bf->bf_state.bfs_dobaw && 2380227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2381227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2382236878Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2383227364Sadrian ath_tx_tid_sched(sc, tid); 2384227364Sadrian return; 2385227364Sadrian } 2386227364Sadrian 2387227364Sadrian /* Direct dispatch to hardware */ 2388227364Sadrian ath_tx_do_ratelookup(sc, bf); 2389233989Sadrian ath_tx_calc_duration(sc, bf); 2390233989Sadrian ath_tx_calc_protection(sc, bf); 2391233989Sadrian ath_tx_set_rtscts(sc, bf); 2392227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2393227364Sadrian ath_tx_setds(sc, bf); 2394227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 2395227364Sadrian ath_tx_chaindesclist(sc, bf); 2396227364Sadrian 2397227364Sadrian /* Statistics */ 2398227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2399227364Sadrian 2400227364Sadrian /* Track per-TID hardware queue depth correctly */ 2401227364Sadrian tid->hwq_depth++; 2402227364Sadrian 2403227364Sadrian /* Add to BAW */ 2404227364Sadrian if (bf->bf_state.bfs_dobaw) { 2405227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2406227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2407227364Sadrian } 2408227364Sadrian 2409227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2410227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2411227364Sadrian 2412227364Sadrian /* Hand off to hardware */ 2413227364Sadrian ath_tx_handoff(sc, txq, bf); 2414227364Sadrian} 2415227364Sadrian 2416227364Sadrian/* 2417227364Sadrian * Attempt to send the packet. 2418227364Sadrian * If the queue isn't busy, direct-dispatch. 2419227364Sadrian * If the queue is busy enough, queue the given packet on the 2420227364Sadrian * relevant software queue. 2421227364Sadrian */ 2422227364Sadrianvoid 2423227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2424227364Sadrian struct ath_buf *bf) 2425227364Sadrian{ 2426227364Sadrian struct ath_node *an = ATH_NODE(ni); 2427227364Sadrian struct ieee80211_frame *wh; 2428227364Sadrian struct ath_tid *atid; 2429227364Sadrian int pri, tid; 2430227364Sadrian struct mbuf *m0 = bf->bf_m; 2431227364Sadrian 2432236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2433236880Sadrian 2434227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2435227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2436227364Sadrian pri = ath_tx_getac(sc, m0); 2437227364Sadrian tid = ath_tx_gettid(sc, m0); 2438227364Sadrian atid = &an->an_tid[tid]; 2439227364Sadrian 2440236873Sadrian ATH_TID_LOCK_ASSERT(sc, atid); 2441236873Sadrian 2442236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2443236872Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2444227364Sadrian 2445227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2446227364Sadrian bf->bf_state.bfs_tid = tid; 2447227364Sadrian bf->bf_state.bfs_txq = txq; 2448227364Sadrian bf->bf_state.bfs_pri = pri; 2449227364Sadrian 2450227364Sadrian /* 2451227364Sadrian * If the hardware queue isn't busy, queue it directly. 2452227364Sadrian * If the hardware queue is busy, queue it. 2453227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2454227364Sadrian * queue it. 2455227364Sadrian */ 2456227364Sadrian if (atid->paused) { 2457227364Sadrian /* TID is paused, queue */ 2458236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2459227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2460227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2461227364Sadrian /* AMPDU pending; queue */ 2462236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2463227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2464227364Sadrian /* XXX sched? */ 2465227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2466227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2467236877Sadrian 2468236877Sadrian /* 2469236877Sadrian * Always queue the frame to the tail of the list. 2470236877Sadrian */ 2471236877Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2472236877Sadrian 2473236877Sadrian /* 2474236877Sadrian * If the hardware queue isn't busy, direct dispatch 2475236877Sadrian * the head frame in the list. Don't schedule the 2476236877Sadrian * TID - let it build some more frames first? 2477236877Sadrian * 2478236877Sadrian * Otherwise, schedule the TID. 2479236877Sadrian */ 2480229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2481236877Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2482236877Sadrian ATH_TXQ_REMOVE(atid, bf, bf_list); 2483236872Sadrian ath_tx_xmit_aggr(sc, an, bf); 2484233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2485236872Sadrian "%s: xmit_aggr\n", 2486236872Sadrian __func__); 2487229949Sadrian } else { 2488229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2489236872Sadrian "%s: ampdu; swq'ing\n", 2490236872Sadrian __func__); 2491227364Sadrian ath_tx_tid_sched(sc, atid); 2492227364Sadrian } 2493227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2494227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2495236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2496227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2497227364Sadrian } else { 2498227364Sadrian /* Busy; queue */ 2499236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2500227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2501227364Sadrian ath_tx_tid_sched(sc, atid); 2502227364Sadrian } 2503227364Sadrian} 2504227364Sadrian 2505227364Sadrian/* 2506227364Sadrian * Do the basic frame setup stuff that's required before the frame 2507227364Sadrian * is added to a software queue. 2508227364Sadrian * 2509227364Sadrian * All frames get mostly the same treatment and it's done once. 2510227364Sadrian * Retransmits fiddle with things like the rate control setup, 2511227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2512227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2513227364Sadrian * 2514227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2515227364Sadrian * m0 may not be valid. 2516227364Sadrian */ 2517227364Sadrian 2518227364Sadrian 2519227364Sadrian/* 2520227364Sadrian * Configure the per-TID node state. 2521227364Sadrian * 2522227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2523227364Sadrian * else to put it just yet. 2524227364Sadrian * 2525227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2526227364Sadrian */ 2527227364Sadrianvoid 2528227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2529227364Sadrian{ 2530227364Sadrian int i, j; 2531227364Sadrian struct ath_tid *atid; 2532227364Sadrian 2533227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2534227364Sadrian atid = &an->an_tid[i]; 2535227364Sadrian TAILQ_INIT(&atid->axq_q); 2536227364Sadrian atid->tid = i; 2537227364Sadrian atid->an = an; 2538227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2539227364Sadrian atid->tx_buf[j] = NULL; 2540227364Sadrian atid->baw_head = atid->baw_tail = 0; 2541227364Sadrian atid->paused = 0; 2542227364Sadrian atid->sched = 0; 2543227364Sadrian atid->hwq_depth = 0; 2544227364Sadrian atid->cleanup_inprogress = 0; 2545227364Sadrian if (i == IEEE80211_NONQOS_TID) 2546227364Sadrian atid->ac = WME_AC_BE; 2547227364Sadrian else 2548227364Sadrian atid->ac = TID_TO_WME_AC(i); 2549227364Sadrian } 2550227364Sadrian} 2551227364Sadrian 2552227364Sadrian/* 2553227364Sadrian * Pause the current TID. This stops packets from being transmitted 2554227364Sadrian * on it. 2555227364Sadrian * 2556227364Sadrian * Since this is also called from upper layers as well as the driver, 2557227364Sadrian * it will get the TID lock. 2558227364Sadrian */ 2559227364Sadrianstatic void 2560227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2561227364Sadrian{ 2562233908Sadrian 2563233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2564227364Sadrian tid->paused++; 2565227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2566227364Sadrian __func__, tid->paused); 2567227364Sadrian} 2568227364Sadrian 2569227364Sadrian/* 2570227364Sadrian * Unpause the current TID, and schedule it if needed. 2571227364Sadrian */ 2572227364Sadrianstatic void 2573227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2574227364Sadrian{ 2575227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2576227364Sadrian 2577227364Sadrian tid->paused--; 2578227364Sadrian 2579227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2580227364Sadrian __func__, tid->paused); 2581227364Sadrian 2582227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2583227364Sadrian return; 2584227364Sadrian } 2585227364Sadrian 2586227364Sadrian ath_tx_tid_sched(sc, tid); 2587227364Sadrian /* Punt some frames to the hardware if needed */ 2588233673Sadrian //ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2589233673Sadrian taskqueue_enqueue(sc->sc_tq, &sc->sc_txqtask); 2590227364Sadrian} 2591227364Sadrian 2592227364Sadrian/* 2593233908Sadrian * Suspend the queue because we need to TX a BAR. 2594233908Sadrian */ 2595233908Sadrianstatic void 2596233908Sadrianath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid) 2597233908Sadrian{ 2598233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2599233908Sadrian 2600235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2601235676Sadrian "%s: tid=%p, bar_wait=%d, bar_tx=%d, called\n", 2602233908Sadrian __func__, 2603235676Sadrian tid, 2604235676Sadrian tid->bar_wait, 2605235676Sadrian tid->bar_tx); 2606233908Sadrian 2607233908Sadrian /* We shouldn't be called when bar_tx is 1 */ 2608233908Sadrian if (tid->bar_tx) { 2609233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx is 1?!\n", 2610233908Sadrian __func__); 2611233908Sadrian } 2612233908Sadrian 2613233908Sadrian /* If we've already been called, just be patient. */ 2614233908Sadrian if (tid->bar_wait) 2615233908Sadrian return; 2616233908Sadrian 2617233908Sadrian /* Wait! */ 2618233908Sadrian tid->bar_wait = 1; 2619233908Sadrian 2620233908Sadrian /* Only one pause, no matter how many frames fail */ 2621233908Sadrian ath_tx_tid_pause(sc, tid); 2622233908Sadrian} 2623233908Sadrian 2624233908Sadrian/* 2625233908Sadrian * We've finished with BAR handling - either we succeeded or 2626233908Sadrian * failed. Either way, unsuspend TX. 2627233908Sadrian */ 2628233908Sadrianstatic void 2629233908Sadrianath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid) 2630233908Sadrian{ 2631233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2632233908Sadrian 2633235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2634233908Sadrian "%s: tid=%p, called\n", 2635233908Sadrian __func__, 2636233908Sadrian tid); 2637233908Sadrian 2638233908Sadrian if (tid->bar_tx == 0 || tid->bar_wait == 0) { 2639233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx=%d, bar_wait=%d: ?\n", 2640233908Sadrian __func__, tid->bar_tx, tid->bar_wait); 2641233908Sadrian } 2642233908Sadrian 2643233908Sadrian tid->bar_tx = tid->bar_wait = 0; 2644233908Sadrian ath_tx_tid_resume(sc, tid); 2645233908Sadrian} 2646233908Sadrian 2647233908Sadrian/* 2648233908Sadrian * Return whether we're ready to TX a BAR frame. 2649233908Sadrian * 2650233908Sadrian * Requires the TID lock be held. 2651233908Sadrian */ 2652233908Sadrianstatic int 2653233908Sadrianath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid) 2654233908Sadrian{ 2655233908Sadrian 2656233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2657233908Sadrian 2658233908Sadrian if (tid->bar_wait == 0 || tid->hwq_depth > 0) 2659233908Sadrian return (0); 2660233908Sadrian 2661235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, "%s: tid=%p (%d), bar ready\n", 2662235491Sadrian __func__, tid, tid->tid); 2663235491Sadrian 2664233908Sadrian return (1); 2665233908Sadrian} 2666233908Sadrian 2667233908Sadrian/* 2668233908Sadrian * Check whether the current TID is ready to have a BAR 2669233908Sadrian * TXed and if so, do the TX. 2670233908Sadrian * 2671233908Sadrian * Since the TID/TXQ lock can't be held during a call to 2672233908Sadrian * ieee80211_send_bar(), we have to do the dirty thing of unlocking it, 2673233908Sadrian * sending the BAR and locking it again. 2674233908Sadrian * 2675233908Sadrian * Eventually, the code to send the BAR should be broken out 2676233908Sadrian * from this routine so the lock doesn't have to be reacquired 2677233908Sadrian * just to be immediately dropped by the caller. 2678233908Sadrian */ 2679233908Sadrianstatic void 2680233908Sadrianath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid) 2681233908Sadrian{ 2682233908Sadrian struct ieee80211_tx_ampdu *tap; 2683233908Sadrian 2684233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2685233908Sadrian 2686235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2687233908Sadrian "%s: tid=%p, called\n", 2688233908Sadrian __func__, 2689233908Sadrian tid); 2690233908Sadrian 2691233908Sadrian tap = ath_tx_get_tx_tid(tid->an, tid->tid); 2692233908Sadrian 2693233908Sadrian /* 2694233908Sadrian * This is an error condition! 2695233908Sadrian */ 2696233908Sadrian if (tid->bar_wait == 0 || tid->bar_tx == 1) { 2697233908Sadrian device_printf(sc->sc_dev, 2698233908Sadrian "%s: tid=%p, bar_tx=%d, bar_wait=%d: ?\n", 2699233908Sadrian __func__, 2700233908Sadrian tid, 2701233908Sadrian tid->bar_tx, 2702233908Sadrian tid->bar_wait); 2703233908Sadrian return; 2704233908Sadrian } 2705233908Sadrian 2706233908Sadrian /* Don't do anything if we still have pending frames */ 2707233908Sadrian if (tid->hwq_depth > 0) { 2708235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2709233908Sadrian "%s: tid=%p, hwq_depth=%d, waiting\n", 2710233908Sadrian __func__, 2711233908Sadrian tid, 2712233908Sadrian tid->hwq_depth); 2713233908Sadrian return; 2714233908Sadrian } 2715233908Sadrian 2716233908Sadrian /* We're now about to TX */ 2717233908Sadrian tid->bar_tx = 1; 2718233908Sadrian 2719233908Sadrian /* 2720233908Sadrian * Calculate new BAW left edge, now that all frames have either 2721233908Sadrian * succeeded or failed. 2722233908Sadrian * 2723233908Sadrian * XXX verify this is _actually_ the valid value to begin at! 2724233908Sadrian */ 2725235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2726233908Sadrian "%s: tid=%p, new BAW left edge=%d\n", 2727233908Sadrian __func__, 2728233908Sadrian tid, 2729233908Sadrian tap->txa_start); 2730233908Sadrian 2731233908Sadrian /* Try sending the BAR frame */ 2732233908Sadrian /* We can't hold the lock here! */ 2733233908Sadrian 2734233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2735233908Sadrian if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) { 2736233908Sadrian /* Success? Now we wait for notification that it's done */ 2737233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2738233908Sadrian return; 2739233908Sadrian } 2740233908Sadrian 2741233908Sadrian /* Failure? For now, warn loudly and continue */ 2742233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2743233908Sadrian device_printf(sc->sc_dev, "%s: tid=%p, failed to TX BAR, continue!\n", 2744233908Sadrian __func__, tid); 2745233908Sadrian ath_tx_tid_bar_unsuspend(sc, tid); 2746233908Sadrian} 2747233908Sadrian 2748233908Sadrian 2749233908Sadrian/* 2750227364Sadrian * Free any packets currently pending in the software TX queue. 2751227364Sadrian * 2752227364Sadrian * This will be called when a node is being deleted. 2753227364Sadrian * 2754227364Sadrian * It can also be called on an active node during an interface 2755227364Sadrian * reset or state transition. 2756227364Sadrian * 2757227364Sadrian * (From Linux/reference): 2758227364Sadrian * 2759227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2760227364Sadrian * sequence number(s) without setting the retry bit. The 2761227364Sadrian * alternative is to give up on these and BAR the receiver's window 2762227364Sadrian * forward. 2763227364Sadrian */ 2764227364Sadrianstatic void 2765229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 2766229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 2767227364Sadrian{ 2768227364Sadrian struct ath_buf *bf; 2769227364Sadrian struct ieee80211_tx_ampdu *tap; 2770227364Sadrian struct ieee80211_node *ni = &an->an_node; 2771227364Sadrian int t = 0; 2772227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2773227364Sadrian 2774227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2775227364Sadrian 2776227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2777227364Sadrian 2778227364Sadrian /* Walk the queue, free frames */ 2779227364Sadrian for (;;) { 2780227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2781227364Sadrian if (bf == NULL) { 2782227364Sadrian break; 2783227364Sadrian } 2784227364Sadrian 2785227364Sadrian if (t == 0) { 2786227364Sadrian device_printf(sc->sc_dev, 2787233330Sadrian "%s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 2788236872Sadrian "seqno=%d, retry=%d\n", 2789233330Sadrian __func__, ni, bf, 2790233330Sadrian bf->bf_state.bfs_addedbaw, 2791233330Sadrian bf->bf_state.bfs_dobaw, 2792233480Sadrian SEQNO(bf->bf_state.bfs_seqno), 2793233480Sadrian bf->bf_state.bfs_retries); 2794233330Sadrian device_printf(sc->sc_dev, 2795235491Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d\n", 2796233480Sadrian __func__, ni, bf, 2797233480Sadrian tid->axq_depth, 2798235491Sadrian tid->hwq_depth, 2799235491Sadrian tid->bar_wait); 2800233480Sadrian device_printf(sc->sc_dev, 2801236872Sadrian "%s: node %p: tid %d: txq_depth=%d, " 2802227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2803229949Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, " 2804229949Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 2805236872Sadrian __func__, ni, tid->tid, txq->axq_depth, 2806227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2807227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2808227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2809227364Sadrian ni->ni_txseqs[tid->tid]); 2810229165Sadrian 2811229165Sadrian /* XXX Dump the frame, see what it is? */ 2812229165Sadrian ieee80211_dump_pkt(ni->ni_ic, 2813229165Sadrian mtod(bf->bf_m, const uint8_t *), 2814229165Sadrian bf->bf_m->m_len, 0, -1); 2815229165Sadrian 2816233897Sadrian t = 1; 2817227364Sadrian } 2818227364Sadrian 2819227364Sadrian 2820227364Sadrian /* 2821227364Sadrian * If the current TID is running AMPDU, update 2822227364Sadrian * the BAW. 2823227364Sadrian */ 2824227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 2825227364Sadrian bf->bf_state.bfs_dobaw) { 2826227364Sadrian /* 2827227364Sadrian * Only remove the frame from the BAW if it's 2828227364Sadrian * been transmitted at least once; this means 2829227364Sadrian * the frame was in the BAW to begin with. 2830227364Sadrian */ 2831227364Sadrian if (bf->bf_state.bfs_retries > 0) { 2832227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 2833227364Sadrian bf->bf_state.bfs_dobaw = 0; 2834227364Sadrian } 2835227364Sadrian /* 2836227364Sadrian * This has become a non-fatal error now 2837227364Sadrian */ 2838227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2839227364Sadrian device_printf(sc->sc_dev, 2840227364Sadrian "%s: wasn't added: seqno %d\n", 2841227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2842227364Sadrian } 2843227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 2844227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 2845227364Sadrian } 2846227364Sadrian 2847227364Sadrian /* 2848227364Sadrian * Now that it's completed, grab the TID lock and update 2849227364Sadrian * the sequence number and BAW window. 2850227364Sadrian * Because sequence numbers have been assigned to frames 2851227364Sadrian * that haven't been sent yet, it's entirely possible 2852227364Sadrian * we'll be called with some pending frames that have not 2853227364Sadrian * been transmitted. 2854227364Sadrian * 2855227364Sadrian * The cleaner solution is to do the sequence number allocation 2856227364Sadrian * when the packet is first transmitted - and thus the "retries" 2857227364Sadrian * check above would be enough to update the BAW/seqno. 2858227364Sadrian */ 2859227364Sadrian 2860227364Sadrian /* But don't do it for non-QoS TIDs */ 2861227364Sadrian if (tap) { 2862227364Sadrian#if 0 2863227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2864227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 2865227364Sadrian __func__, an, tid->tid, tap->txa_start); 2866227364Sadrian#endif 2867227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 2868227364Sadrian tid->baw_tail = tid->baw_head; 2869227364Sadrian } 2870227364Sadrian} 2871227364Sadrian 2872227364Sadrian/* 2873227364Sadrian * Flush all software queued packets for the given node. 2874227364Sadrian * 2875227364Sadrian * This occurs when a completion handler frees the last buffer 2876227364Sadrian * for a node, and the node is thus freed. This causes the node 2877227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 2878227364Sadrian */ 2879227364Sadrianvoid 2880227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 2881227364Sadrian{ 2882227364Sadrian int tid; 2883227364Sadrian ath_bufhead bf_cq; 2884227364Sadrian struct ath_buf *bf; 2885227364Sadrian 2886227364Sadrian TAILQ_INIT(&bf_cq); 2887227364Sadrian 2888227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 2889227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2890227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 2891227364Sadrian 2892227364Sadrian /* Remove this tid from the list of active tids */ 2893227364Sadrian ATH_TXQ_LOCK(txq); 2894227364Sadrian ath_tx_tid_unsched(sc, atid); 2895227364Sadrian 2896227364Sadrian /* Free packets */ 2897227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 2898227364Sadrian ATH_TXQ_UNLOCK(txq); 2899227364Sadrian } 2900227364Sadrian 2901227364Sadrian /* Handle completed frames */ 2902227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2903227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2904227364Sadrian ath_tx_default_comp(sc, bf, 0); 2905227364Sadrian } 2906227364Sadrian} 2907227364Sadrian 2908227364Sadrian/* 2909227364Sadrian * Drain all the software TXQs currently with traffic queued. 2910227364Sadrian */ 2911227364Sadrianvoid 2912227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 2913227364Sadrian{ 2914227364Sadrian struct ath_tid *tid; 2915227364Sadrian ath_bufhead bf_cq; 2916227364Sadrian struct ath_buf *bf; 2917227364Sadrian 2918227364Sadrian TAILQ_INIT(&bf_cq); 2919227364Sadrian ATH_TXQ_LOCK(txq); 2920227364Sadrian 2921227364Sadrian /* 2922227364Sadrian * Iterate over all active tids for the given txq, 2923227364Sadrian * flushing and unsched'ing them 2924227364Sadrian */ 2925227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 2926227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 2927227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 2928227364Sadrian ath_tx_tid_unsched(sc, tid); 2929227364Sadrian } 2930227364Sadrian 2931227364Sadrian ATH_TXQ_UNLOCK(txq); 2932227364Sadrian 2933227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2934227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2935227364Sadrian ath_tx_default_comp(sc, bf, 0); 2936227364Sadrian } 2937227364Sadrian} 2938227364Sadrian 2939227364Sadrian/* 2940227364Sadrian * Handle completion of non-aggregate session frames. 2941227364Sadrian */ 2942227364Sadrianvoid 2943227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 2944227364Sadrian{ 2945227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2946227364Sadrian struct ath_node *an = ATH_NODE(ni); 2947227364Sadrian int tid = bf->bf_state.bfs_tid; 2948227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2949227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 2950227364Sadrian 2951227364Sadrian /* The TID state is protected behind the TXQ lock */ 2952227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2953227364Sadrian 2954227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 2955227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 2956227364Sadrian 2957227364Sadrian atid->hwq_depth--; 2958227364Sadrian if (atid->hwq_depth < 0) 2959227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 2960227364Sadrian __func__, atid->hwq_depth); 2961227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2962227364Sadrian 2963227364Sadrian /* 2964227364Sadrian * punt to rate control if we're not being cleaned up 2965227364Sadrian * during a hw queue drain and the frame wanted an ACK. 2966227364Sadrian */ 2967233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 2968227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 2969227364Sadrian ts, bf->bf_state.bfs_pktlen, 2970227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 2971227364Sadrian 2972227364Sadrian ath_tx_default_comp(sc, bf, fail); 2973227364Sadrian} 2974227364Sadrian 2975227364Sadrian/* 2976227364Sadrian * Handle cleanup of aggregate session packets that aren't 2977227364Sadrian * an A-MPDU. 2978227364Sadrian * 2979227364Sadrian * There's no need to update the BAW here - the session is being 2980227364Sadrian * torn down. 2981227364Sadrian */ 2982227364Sadrianstatic void 2983227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2984227364Sadrian{ 2985227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2986227364Sadrian struct ath_node *an = ATH_NODE(ni); 2987227364Sadrian int tid = bf->bf_state.bfs_tid; 2988227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2989227364Sadrian 2990227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 2991227364Sadrian __func__, tid, atid->incomp); 2992227364Sadrian 2993227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2994227364Sadrian atid->incomp--; 2995227364Sadrian if (atid->incomp == 0) { 2996227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2997227364Sadrian "%s: TID %d: cleaned up! resume!\n", 2998227364Sadrian __func__, tid); 2999227364Sadrian atid->cleanup_inprogress = 0; 3000227364Sadrian ath_tx_tid_resume(sc, atid); 3001227364Sadrian } 3002227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3003227364Sadrian 3004227364Sadrian ath_tx_default_comp(sc, bf, 0); 3005227364Sadrian} 3006227364Sadrian 3007227364Sadrian/* 3008227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 3009227364Sadrian * unaggregated. 3010227364Sadrian * 3011227364Sadrian * - Discard all retry frames from the s/w queue. 3012227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 3013227364Sadrian * - Count the number of unacked frames, and let transmit completion 3014227364Sadrian * handle it later. 3015227364Sadrian * 3016227364Sadrian * The caller is responsible for pausing the TID. 3017227364Sadrian */ 3018227364Sadrianstatic void 3019235749Sadrianath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 3020227364Sadrian{ 3021227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3022227364Sadrian struct ieee80211_tx_ampdu *tap; 3023227364Sadrian struct ath_buf *bf, *bf_next; 3024227364Sadrian ath_bufhead bf_cq; 3025227364Sadrian 3026235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 3027227364Sadrian "%s: TID %d: called\n", __func__, tid); 3028227364Sadrian 3029227364Sadrian TAILQ_INIT(&bf_cq); 3030227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3031227364Sadrian 3032227364Sadrian /* 3033227364Sadrian * Update the frames in the software TX queue: 3034227364Sadrian * 3035227364Sadrian * + Discard retry frames in the queue 3036227364Sadrian * + Fix the completion function to be non-aggregate 3037227364Sadrian */ 3038227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 3039227364Sadrian while (bf) { 3040227364Sadrian if (bf->bf_state.bfs_isretried) { 3041227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 3042227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 3043227364Sadrian atid->axq_depth--; 3044227364Sadrian if (bf->bf_state.bfs_dobaw) { 3045227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3046227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3047227364Sadrian device_printf(sc->sc_dev, 3048227364Sadrian "%s: wasn't added: seqno %d\n", 3049229949Sadrian __func__, 3050229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3051227364Sadrian } 3052227364Sadrian bf->bf_state.bfs_dobaw = 0; 3053227364Sadrian /* 3054227364Sadrian * Call the default completion handler with "fail" just 3055227364Sadrian * so upper levels are suitably notified about this. 3056227364Sadrian */ 3057227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3058227364Sadrian bf = bf_next; 3059227364Sadrian continue; 3060227364Sadrian } 3061227364Sadrian /* Give these the default completion handler */ 3062227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3063227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 3064227364Sadrian } 3065227364Sadrian 3066227364Sadrian /* The caller is required to pause the TID */ 3067227364Sadrian#if 0 3068227364Sadrian /* Pause the TID */ 3069227364Sadrian ath_tx_tid_pause(sc, atid); 3070227364Sadrian#endif 3071227364Sadrian 3072227364Sadrian /* 3073227364Sadrian * Calculate what hardware-queued frames exist based 3074227364Sadrian * on the current BAW size. Ie, what frames have been 3075227364Sadrian * added to the TX hardware queue for this TID but 3076227364Sadrian * not yet ACKed. 3077227364Sadrian */ 3078227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3079227364Sadrian /* Need the lock - fiddling with BAW */ 3080227364Sadrian while (atid->baw_head != atid->baw_tail) { 3081227364Sadrian if (atid->tx_buf[atid->baw_head]) { 3082227364Sadrian atid->incomp++; 3083227364Sadrian atid->cleanup_inprogress = 1; 3084227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 3085227364Sadrian } 3086227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 3087227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 3088227364Sadrian } 3089227364Sadrian 3090227364Sadrian /* 3091227364Sadrian * If cleanup is required, defer TID scheduling 3092227364Sadrian * until all the HW queued packets have been 3093227364Sadrian * sent. 3094227364Sadrian */ 3095227364Sadrian if (! atid->cleanup_inprogress) 3096227364Sadrian ath_tx_tid_resume(sc, atid); 3097227364Sadrian 3098227364Sadrian if (atid->cleanup_inprogress) 3099227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3100227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 3101227364Sadrian __func__, tid, atid->incomp); 3102227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3103227364Sadrian 3104227364Sadrian /* Handle completing frames and fail them */ 3105227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3106227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3107227364Sadrian ath_tx_default_comp(sc, bf, 1); 3108227364Sadrian } 3109227364Sadrian} 3110227364Sadrian 3111227364Sadrianstatic void 3112227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 3113227364Sadrian{ 3114227364Sadrian struct ieee80211_frame *wh; 3115227364Sadrian 3116227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 3117227364Sadrian /* Only update/resync if needed */ 3118227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 3119227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 3120227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3121227364Sadrian BUS_DMASYNC_PREWRITE); 3122227364Sadrian } 3123227364Sadrian sc->sc_stats.ast_tx_swretries++; 3124227364Sadrian bf->bf_state.bfs_isretried = 1; 3125227364Sadrian bf->bf_state.bfs_retries ++; 3126227364Sadrian} 3127227364Sadrian 3128227364Sadrianstatic struct ath_buf * 3129227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3130227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3131227364Sadrian{ 3132227364Sadrian struct ath_buf *nbf; 3133227364Sadrian int error; 3134227364Sadrian 3135227364Sadrian nbf = ath_buf_clone(sc, bf); 3136227364Sadrian 3137227364Sadrian#if 0 3138227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3139227364Sadrian __func__); 3140227364Sadrian#endif 3141227364Sadrian 3142227364Sadrian if (nbf == NULL) { 3143227364Sadrian /* Failed to clone */ 3144227364Sadrian device_printf(sc->sc_dev, 3145227364Sadrian "%s: failed to clone a busy buffer\n", 3146227364Sadrian __func__); 3147227364Sadrian return NULL; 3148227364Sadrian } 3149227364Sadrian 3150227364Sadrian /* Setup the dma for the new buffer */ 3151227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3152227364Sadrian if (error != 0) { 3153227364Sadrian device_printf(sc->sc_dev, 3154227364Sadrian "%s: failed to setup dma for clone\n", 3155227364Sadrian __func__); 3156227364Sadrian /* 3157227364Sadrian * Put this at the head of the list, not tail; 3158227364Sadrian * that way it doesn't interfere with the 3159227364Sadrian * busy buffer logic (which uses the tail of 3160227364Sadrian * the list.) 3161227364Sadrian */ 3162227364Sadrian ATH_TXBUF_LOCK(sc); 3163236994Sadrian ath_returnbuf_head(sc, nbf); 3164227364Sadrian ATH_TXBUF_UNLOCK(sc); 3165227364Sadrian return NULL; 3166227364Sadrian } 3167227364Sadrian 3168227398Sadrian /* Update BAW if required, before we free the original buf */ 3169227398Sadrian if (bf->bf_state.bfs_dobaw) 3170227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3171227398Sadrian 3172227364Sadrian /* Free current buffer; return the older buffer */ 3173227364Sadrian bf->bf_m = NULL; 3174227364Sadrian bf->bf_node = NULL; 3175227364Sadrian ath_freebuf(sc, bf); 3176227364Sadrian return nbf; 3177227364Sadrian} 3178227364Sadrian 3179227364Sadrian/* 3180227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3181227364Sadrian * session. 3182227364Sadrian * 3183227364Sadrian * If too many retries occur, pause the TID, wait for 3184227364Sadrian * any further retransmits (as there's no reason why 3185227364Sadrian * non-aggregate frames in an aggregate session are 3186227364Sadrian * transmitted in-order; they just have to be in-BAW) 3187227364Sadrian * and then queue a BAR. 3188227364Sadrian */ 3189227364Sadrianstatic void 3190227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3191227364Sadrian{ 3192227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3193227364Sadrian struct ath_node *an = ATH_NODE(ni); 3194227364Sadrian int tid = bf->bf_state.bfs_tid; 3195227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3196227364Sadrian struct ieee80211_tx_ampdu *tap; 3197227364Sadrian 3198227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3199227364Sadrian 3200227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3201227364Sadrian 3202227364Sadrian /* 3203227364Sadrian * If the buffer is marked as busy, we can't directly 3204227364Sadrian * reuse it. Instead, try to clone the buffer. 3205227364Sadrian * If the clone is successful, recycle the old buffer. 3206227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3207227364Sadrian * to force the next bit of code to free the buffer 3208227364Sadrian * for us. 3209227364Sadrian */ 3210227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3211227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3212227364Sadrian struct ath_buf *nbf; 3213227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3214227364Sadrian if (nbf) 3215227364Sadrian /* bf has been freed at this point */ 3216227364Sadrian bf = nbf; 3217227364Sadrian else 3218227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3219227364Sadrian } 3220227364Sadrian 3221227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3222227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3223227364Sadrian "%s: exceeded retries; seqno %d\n", 3224227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3225227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3226227364Sadrian 3227227364Sadrian /* Update BAW anyway */ 3228227364Sadrian if (bf->bf_state.bfs_dobaw) { 3229227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3230227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3231227364Sadrian device_printf(sc->sc_dev, 3232227364Sadrian "%s: wasn't added: seqno %d\n", 3233227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3234227364Sadrian } 3235227364Sadrian bf->bf_state.bfs_dobaw = 0; 3236227364Sadrian 3237233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3238233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3239227364Sadrian 3240233908Sadrian /* Send the BAR if there are no other frames waiting */ 3241233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3242233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3243227364Sadrian 3244233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3245227364Sadrian 3246227364Sadrian /* Free buffer, bf is free after this call */ 3247227364Sadrian ath_tx_default_comp(sc, bf, 0); 3248227364Sadrian return; 3249227364Sadrian } 3250227364Sadrian 3251227364Sadrian /* 3252227364Sadrian * This increments the retry counter as well as 3253227364Sadrian * sets the retry flag in the ath_buf and packet 3254227364Sadrian * body. 3255227364Sadrian */ 3256227364Sadrian ath_tx_set_retry(sc, bf); 3257227364Sadrian 3258227364Sadrian /* 3259227364Sadrian * Insert this at the head of the queue, so it's 3260227364Sadrian * retried before any current/subsequent frames. 3261227364Sadrian */ 3262227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3263227364Sadrian ath_tx_tid_sched(sc, atid); 3264233908Sadrian /* Send the BAR if there are no other frames waiting */ 3265233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3266233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3267227364Sadrian 3268227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3269227364Sadrian} 3270227364Sadrian 3271227364Sadrian/* 3272227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3273227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3274227364Sadrian * buffers. 3275227364Sadrian * 3276227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3277227364Sadrian */ 3278227364Sadrianstatic int 3279227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3280227364Sadrian ath_bufhead *bf_q) 3281227364Sadrian{ 3282227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3283227364Sadrian struct ath_node *an = ATH_NODE(ni); 3284227364Sadrian int tid = bf->bf_state.bfs_tid; 3285227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3286227364Sadrian 3287227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 3288227364Sadrian 3289227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3290227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 3291227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 3292227364Sadrian 3293227364Sadrian /* 3294227364Sadrian * If the buffer is marked as busy, we can't directly 3295227364Sadrian * reuse it. Instead, try to clone the buffer. 3296227364Sadrian * If the clone is successful, recycle the old buffer. 3297227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3298227364Sadrian * to force the next bit of code to free the buffer 3299227364Sadrian * for us. 3300227364Sadrian */ 3301227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3302227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3303227364Sadrian struct ath_buf *nbf; 3304227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3305227364Sadrian if (nbf) 3306227364Sadrian /* bf has been freed at this point */ 3307227364Sadrian bf = nbf; 3308227364Sadrian else 3309227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3310227364Sadrian } 3311227364Sadrian 3312227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3313227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3314227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3315227364Sadrian "%s: max retries: seqno %d\n", 3316227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3317227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3318227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3319227364Sadrian device_printf(sc->sc_dev, 3320227364Sadrian "%s: wasn't added: seqno %d\n", 3321227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3322227364Sadrian bf->bf_state.bfs_dobaw = 0; 3323227364Sadrian return 1; 3324227364Sadrian } 3325227364Sadrian 3326227364Sadrian ath_tx_set_retry(sc, bf); 3327227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 3328227364Sadrian 3329227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3330227364Sadrian return 0; 3331227364Sadrian} 3332227364Sadrian 3333227364Sadrian/* 3334227364Sadrian * error pkt completion for an aggregate destination 3335227364Sadrian */ 3336227364Sadrianstatic void 3337227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 3338227364Sadrian struct ath_tid *tid) 3339227364Sadrian{ 3340227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3341227364Sadrian struct ath_node *an = ATH_NODE(ni); 3342227364Sadrian struct ath_buf *bf_next, *bf; 3343227364Sadrian ath_bufhead bf_q; 3344227364Sadrian int drops = 0; 3345227364Sadrian struct ieee80211_tx_ampdu *tap; 3346227364Sadrian ath_bufhead bf_cq; 3347227364Sadrian 3348227364Sadrian TAILQ_INIT(&bf_q); 3349227364Sadrian TAILQ_INIT(&bf_cq); 3350227364Sadrian 3351227364Sadrian /* 3352227364Sadrian * Update rate control - all frames have failed. 3353227364Sadrian * 3354227364Sadrian * XXX use the length in the first frame in the series; 3355227364Sadrian * XXX just so things are consistent for now. 3356227364Sadrian */ 3357227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 3358227364Sadrian &bf_first->bf_status.ds_txstat, 3359227364Sadrian bf_first->bf_state.bfs_pktlen, 3360227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 3361227364Sadrian 3362227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3363227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3364227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 3365227364Sadrian 3366227364Sadrian /* Retry all subframes */ 3367227364Sadrian bf = bf_first; 3368227364Sadrian while (bf) { 3369227364Sadrian bf_next = bf->bf_next; 3370227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3371227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3372227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3373227364Sadrian drops++; 3374227364Sadrian bf->bf_next = NULL; 3375227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3376227364Sadrian } 3377227364Sadrian bf = bf_next; 3378227364Sadrian } 3379227364Sadrian 3380227364Sadrian /* Prepend all frames to the beginning of the queue */ 3381227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3382227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3383227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 3384227364Sadrian } 3385227364Sadrian 3386234725Sadrian /* 3387234725Sadrian * Schedule the TID to be re-tried. 3388234725Sadrian */ 3389227364Sadrian ath_tx_tid_sched(sc, tid); 3390227364Sadrian 3391227364Sadrian /* 3392227364Sadrian * send bar if we dropped any frames 3393227364Sadrian * 3394227364Sadrian * Keep the txq lock held for now, as we need to ensure 3395227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 3396227364Sadrian * in the ifnet TX context or raw TX context.) 3397227364Sadrian */ 3398227364Sadrian if (drops) { 3399233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3400233908Sadrian ath_tx_tid_bar_suspend(sc, tid); 3401227364Sadrian } 3402227364Sadrian 3403233908Sadrian /* 3404233908Sadrian * Send BAR if required 3405233908Sadrian */ 3406233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, tid)) 3407233908Sadrian ath_tx_tid_bar_tx(sc, tid); 3408233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3409233908Sadrian 3410227364Sadrian /* Complete frames which errored out */ 3411227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3412227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3413227364Sadrian ath_tx_default_comp(sc, bf, 0); 3414227364Sadrian } 3415227364Sadrian} 3416227364Sadrian 3417227364Sadrian/* 3418227364Sadrian * Handle clean-up of packets from an aggregate list. 3419227364Sadrian * 3420227364Sadrian * There's no need to update the BAW here - the session is being 3421227364Sadrian * torn down. 3422227364Sadrian */ 3423227364Sadrianstatic void 3424227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3425227364Sadrian{ 3426227364Sadrian struct ath_buf *bf, *bf_next; 3427227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3428227364Sadrian struct ath_node *an = ATH_NODE(ni); 3429227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3430227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3431227364Sadrian 3432227364Sadrian bf = bf_first; 3433227364Sadrian 3434227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3435227364Sadrian 3436227364Sadrian /* update incomp */ 3437227364Sadrian while (bf) { 3438227364Sadrian atid->incomp--; 3439227364Sadrian bf = bf->bf_next; 3440227364Sadrian } 3441227364Sadrian 3442227364Sadrian if (atid->incomp == 0) { 3443227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3444227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3445227364Sadrian __func__, tid); 3446227364Sadrian atid->cleanup_inprogress = 0; 3447227364Sadrian ath_tx_tid_resume(sc, atid); 3448227364Sadrian } 3449233908Sadrian 3450233908Sadrian /* Send BAR if required */ 3451233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3452233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3453227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3454227364Sadrian 3455227364Sadrian /* Handle frame completion */ 3456227364Sadrian while (bf) { 3457227364Sadrian bf_next = bf->bf_next; 3458227364Sadrian ath_tx_default_comp(sc, bf, 1); 3459227364Sadrian bf = bf_next; 3460227364Sadrian } 3461227364Sadrian} 3462227364Sadrian 3463227364Sadrian/* 3464227364Sadrian * Handle completion of an set of aggregate frames. 3465227364Sadrian * 3466227364Sadrian * XXX for now, simply complete each sub-frame. 3467227364Sadrian * 3468227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3469227364Sadrian * not the last descriptor in the first frame. 3470227364Sadrian */ 3471227364Sadrianstatic void 3472229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 3473229949Sadrian int fail) 3474227364Sadrian{ 3475227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3476227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3477227364Sadrian struct ath_node *an = ATH_NODE(ni); 3478227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3479227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3480227364Sadrian struct ath_tx_status ts; 3481227364Sadrian struct ieee80211_tx_ampdu *tap; 3482227364Sadrian ath_bufhead bf_q; 3483227364Sadrian ath_bufhead bf_cq; 3484227364Sadrian int seq_st, tx_ok; 3485227364Sadrian int hasba, isaggr; 3486227364Sadrian uint32_t ba[2]; 3487227364Sadrian struct ath_buf *bf, *bf_next; 3488227364Sadrian int ba_index; 3489227364Sadrian int drops = 0; 3490227364Sadrian int nframes = 0, nbad = 0, nf; 3491227364Sadrian int pktlen; 3492227364Sadrian /* XXX there's too much on the stack? */ 3493236038Sadrian struct ath_rc_series rc[ATH_RC_NUM]; 3494227364Sadrian int txseq; 3495227364Sadrian 3496227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3497227364Sadrian __func__, atid->hwq_depth); 3498227364Sadrian 3499227364Sadrian /* The TID state is kept behind the TXQ lock */ 3500227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3501227364Sadrian 3502227364Sadrian atid->hwq_depth--; 3503227364Sadrian if (atid->hwq_depth < 0) 3504227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3505227364Sadrian __func__, atid->hwq_depth); 3506227364Sadrian 3507227364Sadrian /* 3508227364Sadrian * Punt cleanup to the relevant function, not our problem now 3509227364Sadrian */ 3510227364Sadrian if (atid->cleanup_inprogress) { 3511227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3512227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3513227364Sadrian return; 3514227364Sadrian } 3515227364Sadrian 3516227364Sadrian /* 3517227364Sadrian * Take a copy; this may be needed -after- bf_first 3518227364Sadrian * has been completed and freed. 3519227364Sadrian */ 3520227364Sadrian ts = bf_first->bf_status.ds_txstat; 3521227364Sadrian /* 3522227364Sadrian * XXX for now, use the first frame in the aggregate for 3523227364Sadrian * XXX rate control completion; it's at least consistent. 3524227364Sadrian */ 3525227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3526227364Sadrian 3527227364Sadrian /* 3528235461Sadrian * Handle errors first! 3529235461Sadrian * 3530235461Sadrian * Here, handle _any_ error as a "exceeded retries" error. 3531235461Sadrian * Later on (when filtered frames are to be specially handled) 3532235461Sadrian * it'll have to be expanded. 3533227364Sadrian */ 3534235461Sadrian#if 0 3535227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3536235461Sadrian#endif 3537235461Sadrian if (ts.ts_status != 0) { 3538227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3539227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3540227364Sadrian return; 3541227364Sadrian } 3542227364Sadrian 3543227364Sadrian TAILQ_INIT(&bf_q); 3544227364Sadrian TAILQ_INIT(&bf_cq); 3545227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3546227364Sadrian 3547227364Sadrian /* 3548227364Sadrian * extract starting sequence and block-ack bitmap 3549227364Sadrian */ 3550227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3551227364Sadrian seq_st = ts.ts_seqnum; 3552227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3553227364Sadrian tx_ok = (ts.ts_status == 0); 3554227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3555227364Sadrian ba[0] = ts.ts_ba_low; 3556227364Sadrian ba[1] = ts.ts_ba_high; 3557227364Sadrian 3558227364Sadrian /* 3559227364Sadrian * Copy the TX completion status and the rate control 3560227364Sadrian * series from the first descriptor, as it may be freed 3561227364Sadrian * before the rate control code can get its grubby fingers 3562227364Sadrian * into things. 3563227364Sadrian */ 3564227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3565227364Sadrian 3566227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3567229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 3568229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3569227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3570227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3571227364Sadrian 3572227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3573227364Sadrian if (tid != ts.ts_tid) { 3574227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3575227364Sadrian __func__, tid, ts.ts_tid); 3576227364Sadrian tx_ok = 0; 3577227364Sadrian } 3578227364Sadrian 3579227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3580227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3581227364Sadrian device_printf(sc->sc_dev, 3582229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 3583229949Sadrian "seq_st=%d\n", 3584227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3585227364Sadrian /* XXX TODO: schedule an interface reset */ 3586227364Sadrian } 3587227364Sadrian 3588227364Sadrian /* 3589227364Sadrian * Walk the list of frames, figure out which ones were correctly 3590227364Sadrian * sent and which weren't. 3591227364Sadrian */ 3592227364Sadrian bf = bf_first; 3593227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3594227364Sadrian 3595227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3596227364Sadrian bf_first = NULL; 3597227364Sadrian 3598227364Sadrian /* 3599227364Sadrian * Walk the list of completed frames and determine 3600227364Sadrian * which need to be completed and which need to be 3601227364Sadrian * retransmitted. 3602227364Sadrian * 3603227364Sadrian * For completed frames, the completion functions need 3604227364Sadrian * to be called at the end of this function as the last 3605227364Sadrian * node reference may free the node. 3606227364Sadrian * 3607227364Sadrian * Finally, since the TXQ lock can't be held during the 3608227364Sadrian * completion callback (to avoid lock recursion), 3609227364Sadrian * the completion calls have to be done outside of the 3610227364Sadrian * lock. 3611227364Sadrian */ 3612227364Sadrian while (bf) { 3613227364Sadrian nframes++; 3614229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 3615229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3616227364Sadrian bf_next = bf->bf_next; 3617227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3618227364Sadrian 3619227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3620227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3621227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3622227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3623227364Sadrian 3624227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3625227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 3626227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3627227364Sadrian bf->bf_state.bfs_dobaw = 0; 3628227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3629227364Sadrian device_printf(sc->sc_dev, 3630227364Sadrian "%s: wasn't added: seqno %d\n", 3631227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3632227364Sadrian bf->bf_next = NULL; 3633227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3634227364Sadrian } else { 3635227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3636227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3637227364Sadrian drops++; 3638227364Sadrian bf->bf_next = NULL; 3639227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3640227364Sadrian } 3641227364Sadrian nbad++; 3642227364Sadrian } 3643227364Sadrian bf = bf_next; 3644227364Sadrian } 3645227364Sadrian 3646227364Sadrian /* 3647227364Sadrian * Now that the BAW updates have been done, unlock 3648227364Sadrian * 3649227364Sadrian * txseq is grabbed before the lock is released so we 3650227364Sadrian * have a consistent view of what -was- in the BAW. 3651227364Sadrian * Anything after this point will not yet have been 3652227364Sadrian * TXed. 3653227364Sadrian */ 3654227364Sadrian txseq = tap->txa_start; 3655227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3656227364Sadrian 3657227364Sadrian if (nframes != nf) 3658227364Sadrian device_printf(sc->sc_dev, 3659227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3660227364Sadrian __func__, nframes, nf); 3661227364Sadrian 3662227364Sadrian /* 3663227364Sadrian * Now we know how many frames were bad, call the rate 3664227364Sadrian * control code. 3665227364Sadrian */ 3666227364Sadrian if (fail == 0) 3667229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 3668229949Sadrian nbad); 3669227364Sadrian 3670227364Sadrian /* 3671227364Sadrian * send bar if we dropped any frames 3672227364Sadrian */ 3673227364Sadrian if (drops) { 3674233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3675233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3676233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3677233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3678227364Sadrian } 3679227364Sadrian 3680234725Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3681234725Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3682234725Sadrian 3683234725Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3684234725Sadrian 3685227364Sadrian /* Prepend all frames to the beginning of the queue */ 3686227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3687227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3688227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3689227364Sadrian } 3690234725Sadrian 3691234725Sadrian /* 3692234725Sadrian * Reschedule to grab some further frames. 3693234725Sadrian */ 3694227364Sadrian ath_tx_tid_sched(sc, atid); 3695227364Sadrian 3696233908Sadrian /* 3697233908Sadrian * Send BAR if required 3698233908Sadrian */ 3699233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3700233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3701234725Sadrian 3702233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3703233908Sadrian 3704227364Sadrian /* Do deferred completion */ 3705227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3706227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3707227364Sadrian ath_tx_default_comp(sc, bf, 0); 3708227364Sadrian } 3709227364Sadrian} 3710227364Sadrian 3711227364Sadrian/* 3712227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3713227364Sadrian * session. 3714227364Sadrian * 3715227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3716227364Sadrian * ath_tx_draintxq(). 3717227364Sadrian */ 3718227364Sadrianstatic void 3719227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3720227364Sadrian{ 3721227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3722227364Sadrian struct ath_node *an = ATH_NODE(ni); 3723227364Sadrian int tid = bf->bf_state.bfs_tid; 3724227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3725227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3726227364Sadrian 3727227364Sadrian /* 3728227364Sadrian * Update rate control status here, before we possibly 3729227364Sadrian * punt to retry or cleanup. 3730227364Sadrian * 3731227364Sadrian * Do it outside of the TXQ lock. 3732227364Sadrian */ 3733233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3734227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3735227364Sadrian &bf->bf_status.ds_txstat, 3736227364Sadrian bf->bf_state.bfs_pktlen, 3737227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3738227364Sadrian 3739227364Sadrian /* 3740227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3741227364Sadrian * This unfortunately means that it's released and regrabbed 3742227364Sadrian * during retry and cleanup. That's rather inefficient. 3743227364Sadrian */ 3744227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3745227364Sadrian 3746227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3747227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3748227364Sadrian 3749229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 3750229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 3751229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 3752229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3753227364Sadrian 3754227364Sadrian atid->hwq_depth--; 3755227364Sadrian if (atid->hwq_depth < 0) 3756227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3757227364Sadrian __func__, atid->hwq_depth); 3758227364Sadrian 3759227364Sadrian /* 3760227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3761227364Sadrian * rather than handling it here. It's thus their 3762227364Sadrian * responsibility to clean up, call the completion 3763227364Sadrian * function in net80211, etc. 3764227364Sadrian */ 3765227364Sadrian if (atid->cleanup_inprogress) { 3766227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3767229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 3768229949Sadrian __func__); 3769227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3770227364Sadrian return; 3771227364Sadrian } 3772227364Sadrian 3773227364Sadrian /* 3774227364Sadrian * Don't bother with the retry check if all frames 3775227364Sadrian * are being failed (eg during queue deletion.) 3776227364Sadrian */ 3777235461Sadrian#if 0 3778227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3779235461Sadrian#endif 3780235461Sadrian if (fail == 0 && ts->ts_status != 0) { 3781227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3782229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 3783229949Sadrian __func__); 3784227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3785227364Sadrian return; 3786227364Sadrian } 3787227364Sadrian 3788227364Sadrian /* Success? Complete */ 3789227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3790227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3791227364Sadrian if (bf->bf_state.bfs_dobaw) { 3792227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3793227364Sadrian bf->bf_state.bfs_dobaw = 0; 3794227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3795227364Sadrian device_printf(sc->sc_dev, 3796227364Sadrian "%s: wasn't added: seqno %d\n", 3797227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3798227364Sadrian } 3799227364Sadrian 3800233908Sadrian /* 3801233908Sadrian * Send BAR if required 3802233908Sadrian */ 3803233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3804233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3805233908Sadrian 3806227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3807227364Sadrian 3808227364Sadrian ath_tx_default_comp(sc, bf, fail); 3809227364Sadrian /* bf is freed at this point */ 3810227364Sadrian} 3811227364Sadrian 3812227364Sadrianvoid 3813227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3814227364Sadrian{ 3815227364Sadrian if (bf->bf_state.bfs_aggr) 3816227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 3817227364Sadrian else 3818227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 3819227364Sadrian} 3820227364Sadrian 3821227364Sadrian/* 3822227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3823227364Sadrian * 3824227364Sadrian * This is the aggregate version. 3825227364Sadrian */ 3826227364Sadrianvoid 3827227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 3828227364Sadrian struct ath_tid *tid) 3829227364Sadrian{ 3830227364Sadrian struct ath_buf *bf; 3831227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3832227364Sadrian struct ieee80211_tx_ampdu *tap; 3833227364Sadrian struct ieee80211_node *ni = &an->an_node; 3834227364Sadrian ATH_AGGR_STATUS status; 3835227364Sadrian ath_bufhead bf_q; 3836227364Sadrian 3837227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 3838227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3839227364Sadrian 3840227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3841227364Sadrian 3842227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 3843227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 3844227364Sadrian __func__); 3845227364Sadrian 3846227364Sadrian for (;;) { 3847227364Sadrian status = ATH_AGGR_DONE; 3848227364Sadrian 3849227364Sadrian /* 3850227364Sadrian * If the upper layer has paused the TID, don't 3851227364Sadrian * queue any further packets. 3852227364Sadrian * 3853227364Sadrian * This can also occur from the completion task because 3854227364Sadrian * of packet loss; but as its serialised with this code, 3855227364Sadrian * it won't "appear" half way through queuing packets. 3856227364Sadrian */ 3857227364Sadrian if (tid->paused) 3858227364Sadrian break; 3859227364Sadrian 3860227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3861227364Sadrian if (bf == NULL) { 3862227364Sadrian break; 3863227364Sadrian } 3864227364Sadrian 3865227364Sadrian /* 3866227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 3867227364Sadrian * data frame), schedule it directly; continue. 3868227364Sadrian */ 3869227364Sadrian if (! bf->bf_state.bfs_dobaw) { 3870229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3871229949Sadrian "%s: non-baw packet\n", 3872227364Sadrian __func__); 3873227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3874227364Sadrian bf->bf_state.bfs_aggr = 0; 3875227364Sadrian ath_tx_do_ratelookup(sc, bf); 3876233989Sadrian ath_tx_calc_duration(sc, bf); 3877233989Sadrian ath_tx_calc_protection(sc, bf); 3878233989Sadrian ath_tx_set_rtscts(sc, bf); 3879227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3880227364Sadrian ath_tx_setds(sc, bf); 3881227364Sadrian ath_tx_chaindesclist(sc, bf); 3882227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3883227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3884227364Sadrian 3885227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 3886227364Sadrian 3887227364Sadrian /* Queue the packet; continue */ 3888227364Sadrian goto queuepkt; 3889227364Sadrian } 3890227364Sadrian 3891227364Sadrian TAILQ_INIT(&bf_q); 3892227364Sadrian 3893227364Sadrian /* 3894227364Sadrian * Do a rate control lookup on the first frame in the 3895227364Sadrian * list. The rate control code needs that to occur 3896227364Sadrian * before it can determine whether to TX. 3897227364Sadrian * It's inaccurate because the rate control code doesn't 3898227364Sadrian * really "do" aggregate lookups, so it only considers 3899227364Sadrian * the size of the first frame. 3900227364Sadrian */ 3901227364Sadrian ath_tx_do_ratelookup(sc, bf); 3902227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 3903227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 3904233989Sadrian 3905233989Sadrian ath_tx_calc_duration(sc, bf); 3906233989Sadrian ath_tx_calc_protection(sc, bf); 3907233989Sadrian 3908233989Sadrian ath_tx_set_rtscts(sc, bf); 3909227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3910227364Sadrian 3911227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 3912227364Sadrian 3913227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3914227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 3915227364Sadrian 3916227364Sadrian /* 3917227364Sadrian * No frames to be picked up - out of BAW 3918227364Sadrian */ 3919227364Sadrian if (TAILQ_EMPTY(&bf_q)) 3920227364Sadrian break; 3921227364Sadrian 3922227364Sadrian /* 3923227364Sadrian * This assumes that the descriptor list in the ath_bufhead 3924227364Sadrian * are already linked together via bf_next pointers. 3925227364Sadrian */ 3926227364Sadrian bf = TAILQ_FIRST(&bf_q); 3927227364Sadrian 3928233989Sadrian if (status == ATH_AGGR_8K_LIMITED) 3929233989Sadrian sc->sc_aggr_stats.aggr_rts_aggr_limited++; 3930233989Sadrian 3931227364Sadrian /* 3932227364Sadrian * If it's the only frame send as non-aggregate 3933227364Sadrian * assume that ath_tx_form_aggr() has checked 3934227364Sadrian * whether it's in the BAW and added it appropriately. 3935227364Sadrian */ 3936227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 3937227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3938227364Sadrian "%s: single-frame aggregate\n", __func__); 3939227364Sadrian bf->bf_state.bfs_aggr = 0; 3940227364Sadrian ath_tx_setds(sc, bf); 3941227364Sadrian ath_tx_chaindesclist(sc, bf); 3942227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3943227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3944227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 3945227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 3946227364Sadrian else 3947227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 3948227364Sadrian } else { 3949227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3950229949Sadrian "%s: multi-frame aggregate: %d frames, " 3951229949Sadrian "length %d\n", 3952227364Sadrian __func__, bf->bf_state.bfs_nframes, 3953227364Sadrian bf->bf_state.bfs_al); 3954227364Sadrian bf->bf_state.bfs_aggr = 1; 3955227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 3956227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 3957227364Sadrian 3958227364Sadrian /* 3959233989Sadrian * Calculate the duration/protection as required. 3960233989Sadrian */ 3961233989Sadrian ath_tx_calc_duration(sc, bf); 3962233989Sadrian ath_tx_calc_protection(sc, bf); 3963233989Sadrian 3964233989Sadrian /* 3965227364Sadrian * Update the rate and rtscts information based on the 3966227364Sadrian * rate decision made by the rate control code; 3967227364Sadrian * the first frame in the aggregate needs it. 3968227364Sadrian */ 3969227364Sadrian ath_tx_set_rtscts(sc, bf); 3970227364Sadrian 3971227364Sadrian /* 3972227364Sadrian * Setup the relevant descriptor fields 3973227364Sadrian * for aggregation. The first descriptor 3974227364Sadrian * already points to the rest in the chain. 3975227364Sadrian */ 3976227364Sadrian ath_tx_setds_11n(sc, bf); 3977227364Sadrian 3978227364Sadrian /* 3979227364Sadrian * setup first desc with rate and aggr info 3980227364Sadrian */ 3981227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3982227364Sadrian } 3983227364Sadrian queuepkt: 3984227364Sadrian //txq = bf->bf_state.bfs_txq; 3985227364Sadrian 3986227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 3987227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 3988227364Sadrian 3989227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 3990227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 3991227364Sadrian 3992227364Sadrian /* Punt to txq */ 3993227364Sadrian ath_tx_handoff(sc, txq, bf); 3994227364Sadrian 3995227364Sadrian /* Track outstanding buffer count to hardware */ 3996227364Sadrian /* aggregates are "one" buffer */ 3997227364Sadrian tid->hwq_depth++; 3998227364Sadrian 3999227364Sadrian /* 4000227364Sadrian * Break out if ath_tx_form_aggr() indicated 4001227364Sadrian * there can't be any further progress (eg BAW is full.) 4002227364Sadrian * Checking for an empty txq is done above. 4003227364Sadrian * 4004227364Sadrian * XXX locking on txq here? 4005227364Sadrian */ 4006227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 4007227364Sadrian status == ATH_AGGR_BAW_CLOSED) 4008227364Sadrian break; 4009227364Sadrian } 4010227364Sadrian} 4011227364Sadrian 4012227364Sadrian/* 4013227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4014227364Sadrian */ 4015227364Sadrianvoid 4016227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 4017227364Sadrian struct ath_tid *tid) 4018227364Sadrian{ 4019227364Sadrian struct ath_buf *bf; 4020227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4021227364Sadrian struct ieee80211_node *ni = &an->an_node; 4022227364Sadrian 4023227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 4024227364Sadrian __func__, an, tid->tid); 4025227364Sadrian 4026227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4027227364Sadrian 4028227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 4029227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 4030227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 4031227364Sadrian __func__, tid->tid); 4032227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 4033227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 4034227364Sadrian __func__, tid->tid); 4035227364Sadrian 4036227364Sadrian for (;;) { 4037227364Sadrian 4038227364Sadrian /* 4039227364Sadrian * If the upper layers have paused the TID, don't 4040227364Sadrian * queue any further packets. 4041227364Sadrian */ 4042227364Sadrian if (tid->paused) 4043227364Sadrian break; 4044227364Sadrian 4045227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 4046227364Sadrian if (bf == NULL) { 4047227364Sadrian break; 4048227364Sadrian } 4049227364Sadrian 4050227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 4051227364Sadrian 4052227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 4053227364Sadrian 4054227364Sadrian /* Sanity check! */ 4055227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 4056227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 4057227364Sadrian " tid %d\n", 4058227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 4059227364Sadrian } 4060227364Sadrian /* Normal completion handler */ 4061227364Sadrian bf->bf_comp = ath_tx_normal_comp; 4062227364Sadrian 4063227364Sadrian /* Program descriptors + rate control */ 4064227364Sadrian ath_tx_do_ratelookup(sc, bf); 4065233989Sadrian ath_tx_calc_duration(sc, bf); 4066233989Sadrian ath_tx_calc_protection(sc, bf); 4067233989Sadrian ath_tx_set_rtscts(sc, bf); 4068227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4069227364Sadrian ath_tx_setds(sc, bf); 4070227364Sadrian ath_tx_chaindesclist(sc, bf); 4071227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 4072227364Sadrian 4073227364Sadrian /* Track outstanding buffer count to hardware */ 4074227364Sadrian /* aggregates are "one" buffer */ 4075227364Sadrian tid->hwq_depth++; 4076227364Sadrian 4077227364Sadrian /* Punt to hardware or software txq */ 4078227364Sadrian ath_tx_handoff(sc, txq, bf); 4079227364Sadrian } 4080227364Sadrian} 4081227364Sadrian 4082227364Sadrian/* 4083227364Sadrian * Schedule some packets to the given hardware queue. 4084227364Sadrian * 4085227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 4086227364Sadrian * with queued traffic) and attempts to schedule traffic 4087227364Sadrian * from them. 4088227364Sadrian * 4089227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 4090227364Sadrian * added to the end of the queue after some frames have been 4091227364Sadrian * scheduled. 4092227364Sadrian */ 4093227364Sadrianvoid 4094227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 4095227364Sadrian{ 4096227364Sadrian struct ath_tid *tid, *next, *last; 4097227364Sadrian 4098227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4099227364Sadrian 4100227364Sadrian /* 4101227364Sadrian * Don't schedule if the hardware queue is busy. 4102227364Sadrian * This (hopefully) gives some more time to aggregate 4103227364Sadrian * some packets in the aggregation queue. 4104227364Sadrian */ 4105227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4106227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 4107227364Sadrian return; 4108227364Sadrian } 4109227364Sadrian 4110227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 4111227364Sadrian 4112227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 4113227364Sadrian /* 4114227364Sadrian * Suspend paused queues here; they'll be resumed 4115227364Sadrian * once the addba completes or times out. 4116227364Sadrian */ 4117227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 4118227364Sadrian __func__, tid->tid, tid->paused); 4119227364Sadrian ath_tx_tid_unsched(sc, tid); 4120227364Sadrian if (tid->paused) { 4121227364Sadrian continue; 4122227364Sadrian } 4123227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 4124227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 4125227364Sadrian else 4126227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 4127227364Sadrian 4128227364Sadrian /* Not empty? Re-schedule */ 4129227364Sadrian if (tid->axq_depth != 0) 4130227364Sadrian ath_tx_tid_sched(sc, tid); 4131227364Sadrian 4132227364Sadrian /* Give the software queue time to aggregate more packets */ 4133227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4134227364Sadrian break; 4135227364Sadrian } 4136227364Sadrian 4137227364Sadrian /* 4138227364Sadrian * If this was the last entry on the original list, stop. 4139227364Sadrian * Otherwise nodes that have been rescheduled onto the end 4140227364Sadrian * of the TID FIFO list will just keep being rescheduled. 4141227364Sadrian */ 4142227364Sadrian if (tid == last) 4143227364Sadrian break; 4144227364Sadrian } 4145227364Sadrian} 4146227364Sadrian 4147227364Sadrian/* 4148227364Sadrian * TX addba handling 4149227364Sadrian */ 4150227364Sadrian 4151227364Sadrian/* 4152227364Sadrian * Return net80211 TID struct pointer, or NULL for none 4153227364Sadrian */ 4154227364Sadrianstruct ieee80211_tx_ampdu * 4155227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 4156227364Sadrian{ 4157227364Sadrian struct ieee80211_node *ni = &an->an_node; 4158227364Sadrian struct ieee80211_tx_ampdu *tap; 4159227364Sadrian 4160227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4161227364Sadrian return NULL; 4162227364Sadrian 4163234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 4164227364Sadrian return tap; 4165227364Sadrian} 4166227364Sadrian 4167227364Sadrian/* 4168227364Sadrian * Is AMPDU-TX running? 4169227364Sadrian */ 4170227364Sadrianstatic int 4171227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 4172227364Sadrian{ 4173227364Sadrian struct ieee80211_tx_ampdu *tap; 4174227364Sadrian 4175227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4176227364Sadrian return 0; 4177227364Sadrian 4178227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4179227364Sadrian if (tap == NULL) 4180227364Sadrian return 0; /* Not valid; default to not running */ 4181227364Sadrian 4182227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 4183227364Sadrian} 4184227364Sadrian 4185227364Sadrian/* 4186227364Sadrian * Is AMPDU-TX negotiation pending? 4187227364Sadrian */ 4188227364Sadrianstatic int 4189227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 4190227364Sadrian{ 4191227364Sadrian struct ieee80211_tx_ampdu *tap; 4192227364Sadrian 4193227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4194227364Sadrian return 0; 4195227364Sadrian 4196227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4197227364Sadrian if (tap == NULL) 4198227364Sadrian return 0; /* Not valid; default to not pending */ 4199227364Sadrian 4200227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 4201227364Sadrian} 4202227364Sadrian 4203227364Sadrian/* 4204227364Sadrian * Is AMPDU-TX pending for the given TID? 4205227364Sadrian */ 4206227364Sadrian 4207227364Sadrian 4208227364Sadrian/* 4209227364Sadrian * Method to handle sending an ADDBA request. 4210227364Sadrian * 4211227364Sadrian * We tap this so the relevant flags can be set to pause the TID 4212227364Sadrian * whilst waiting for the response. 4213227364Sadrian * 4214227364Sadrian * XXX there's no timeout handler we can override? 4215227364Sadrian */ 4216227364Sadrianint 4217227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4218227364Sadrian int dialogtoken, int baparamset, int batimeout) 4219227364Sadrian{ 4220227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4221234324Sadrian int tid = tap->txa_tid; 4222227364Sadrian struct ath_node *an = ATH_NODE(ni); 4223227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4224227364Sadrian 4225227364Sadrian /* 4226227364Sadrian * XXX danger Will Robinson! 4227227364Sadrian * 4228227364Sadrian * Although the taskqueue may be running and scheduling some more 4229227364Sadrian * packets, these should all be _before_ the addba sequence number. 4230227364Sadrian * However, net80211 will keep self-assigning sequence numbers 4231227364Sadrian * until addba has been negotiated. 4232227364Sadrian * 4233227364Sadrian * In the past, these packets would be "paused" (which still works 4234227364Sadrian * fine, as they're being scheduled to the driver in the same 4235227364Sadrian * serialised method which is calling the addba request routine) 4236227364Sadrian * and when the aggregation session begins, they'll be dequeued 4237227364Sadrian * as aggregate packets and added to the BAW. However, now there's 4238227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 4239227364Sadrian * packets. Thus they never get included in the BAW tracking and 4240227364Sadrian * this can cause the initial burst of packets after the addba 4241227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 4242227364Sadrian * 4243227364Sadrian * The "eventual" solution should be to tag these packets with 4244227364Sadrian * dobaw. Although net80211 has given us a sequence number, 4245227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 4246227364Sadrian * fall within it. 4247227364Sadrian */ 4248235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4249235774Sadrian /* 4250235774Sadrian * This is a bit annoying. Until net80211 HT code inherits some 4251235774Sadrian * (any) locking, we may have this called in parallel BUT only 4252235774Sadrian * one response/timeout will be called. Grr. 4253235774Sadrian */ 4254235774Sadrian if (atid->addba_tx_pending == 0) { 4255235774Sadrian ath_tx_tid_pause(sc, atid); 4256235774Sadrian atid->addba_tx_pending = 1; 4257235774Sadrian } 4258235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4259227364Sadrian 4260227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4261227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 4262227364Sadrian __func__, dialogtoken, baparamset, batimeout); 4263227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4264227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4265227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4266227364Sadrian 4267227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 4268227364Sadrian batimeout); 4269227364Sadrian} 4270227364Sadrian 4271227364Sadrian/* 4272227364Sadrian * Handle an ADDBA response. 4273227364Sadrian * 4274227364Sadrian * We unpause the queue so TX'ing can resume. 4275227364Sadrian * 4276227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 4277227364Sadrian * aggregate or not) so the BAW is updated. 4278227364Sadrian * 4279227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 4280227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 4281227364Sadrian * edge won't match the ni->ni_txseq. 4282227364Sadrian * 4283227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 4284227364Sadrian * ni->ni_txseq. 4285227364Sadrian * 4286227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 4287227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 4288227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 4289227364Sadrian * window. 4290227364Sadrian */ 4291227364Sadrianint 4292227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4293227364Sadrian int status, int code, int batimeout) 4294227364Sadrian{ 4295227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4296234324Sadrian int tid = tap->txa_tid; 4297227364Sadrian struct ath_node *an = ATH_NODE(ni); 4298227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4299227364Sadrian int r; 4300227364Sadrian 4301227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4302227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 4303227364Sadrian status, code, batimeout); 4304227364Sadrian 4305227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4306227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4307227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4308227364Sadrian 4309227364Sadrian /* 4310227364Sadrian * Call this first, so the interface flags get updated 4311227364Sadrian * before the TID is unpaused. Otherwise a race condition 4312227364Sadrian * exists where the unpaused TID still doesn't yet have 4313227364Sadrian * IEEE80211_AGGR_RUNNING set. 4314227364Sadrian */ 4315227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 4316227364Sadrian 4317227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4318235774Sadrian atid->addba_tx_pending = 0; 4319227364Sadrian /* 4320227364Sadrian * XXX dirty! 4321227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 4322227364Sadrian * Read above for more information. 4323227364Sadrian */ 4324227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 4325227364Sadrian ath_tx_tid_resume(sc, atid); 4326227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4327227364Sadrian return r; 4328227364Sadrian} 4329227364Sadrian 4330227364Sadrian 4331227364Sadrian/* 4332227364Sadrian * Stop ADDBA on a queue. 4333237593Sadrian * 4334237593Sadrian * This can be called whilst BAR TX is currently active on the queue, 4335237593Sadrian * so make sure this is unblocked before continuing. 4336227364Sadrian */ 4337227364Sadrianvoid 4338227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 4339227364Sadrian{ 4340227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4341234324Sadrian int tid = tap->txa_tid; 4342227364Sadrian struct ath_node *an = ATH_NODE(ni); 4343227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4344227364Sadrian 4345227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 4346227364Sadrian 4347237593Sadrian /* 4348237593Sadrian * Pause TID traffic early, so there aren't any races 4349237593Sadrian * Unblock the pending BAR held traffic, if it's currently paused. 4350237593Sadrian */ 4351235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4352227364Sadrian ath_tx_tid_pause(sc, atid); 4353237593Sadrian if (atid->bar_wait) { 4354237593Sadrian /* 4355237593Sadrian * bar_unsuspend() expects bar_tx == 1, as it should be 4356237593Sadrian * called from the TX completion path. This quietens 4357237593Sadrian * the warning. It's cleared for us anyway. 4358237593Sadrian */ 4359237593Sadrian atid->bar_tx = 1; 4360237593Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4361237593Sadrian } 4362235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4363227364Sadrian 4364227364Sadrian /* There's no need to hold the TXQ lock here */ 4365227364Sadrian sc->sc_addba_stop(ni, tap); 4366227364Sadrian 4367227364Sadrian /* 4368235749Sadrian * ath_tx_tid_cleanup will resume the TID if possible, otherwise 4369227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 4370227364Sadrian * things have been cleaned up. 4371227364Sadrian */ 4372235749Sadrian ath_tx_tid_cleanup(sc, an, tid); 4373227364Sadrian} 4374227364Sadrian 4375227364Sadrian/* 4376227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 4377227364Sadrian * it simply tears down the aggregation session. Ew. 4378227364Sadrian * 4379227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 4380227364Sadrian * ic->ic_addba_stop(). 4381227364Sadrian * 4382227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 4383227364Sadrian * XXX BAR TX success or failure should be better handled! 4384227364Sadrian */ 4385227364Sadrianvoid 4386227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4387227364Sadrian int status) 4388227364Sadrian{ 4389227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4390234324Sadrian int tid = tap->txa_tid; 4391227364Sadrian struct ath_node *an = ATH_NODE(ni); 4392227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4393227364Sadrian int attempts = tap->txa_attempts; 4394227364Sadrian 4395235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 4396235676Sadrian "%s: called; tap=%p, atid=%p, txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n", 4397235491Sadrian __func__, 4398235676Sadrian tap, 4399235676Sadrian atid, 4400235676Sadrian tap->txa_tid, 4401235676Sadrian atid->tid, 4402235491Sadrian status, 4403235491Sadrian attempts); 4404227364Sadrian 4405227364Sadrian /* Note: This may update the BAW details */ 4406227364Sadrian sc->sc_bar_response(ni, tap, status); 4407227364Sadrian 4408227364Sadrian /* Unpause the TID */ 4409227364Sadrian /* 4410227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 4411227364Sadrian * XXX to a non-aggregate session. So we must unpause the 4412227364Sadrian * XXX TID here or it'll never be done. 4413227364Sadrian */ 4414227364Sadrian if (status == 0 || attempts == 50) { 4415227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4416233908Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4417227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4418227364Sadrian } 4419227364Sadrian} 4420227364Sadrian 4421227364Sadrian/* 4422227364Sadrian * This is called whenever the pending ADDBA request times out. 4423227364Sadrian * Unpause and reschedule the TID. 4424227364Sadrian */ 4425227364Sadrianvoid 4426227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 4427227364Sadrian struct ieee80211_tx_ampdu *tap) 4428227364Sadrian{ 4429227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4430234324Sadrian int tid = tap->txa_tid; 4431227364Sadrian struct ath_node *an = ATH_NODE(ni); 4432227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4433227364Sadrian 4434227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4435227364Sadrian "%s: called; resuming\n", __func__); 4436227364Sadrian 4437235774Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4438235774Sadrian atid->addba_tx_pending = 0; 4439235774Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4440235774Sadrian 4441227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 4442227364Sadrian sc->sc_addba_response_timeout(ni, tap); 4443227364Sadrian 4444227364Sadrian /* Unpause the TID; which reschedules it */ 4445227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4446227364Sadrian ath_tx_tid_resume(sc, atid); 4447227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4448227364Sadrian} 4449