if_ath_tx.c revision 233514
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 233514 2012-03-26 16:05:19Z 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); 112227364Sadrianstatic int ath_tx_action_frame_override_queue(struct ath_softc *sc, 113227364Sadrian struct ieee80211_node *ni, struct mbuf *m0, int *tid); 114233227Sadrianstatic int ath_tx_seqno_required(struct ath_softc *sc, 115233227Sadrian struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0); 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); 187227344Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); 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) { 206218065Sadrian bf = _ath_getbuf_locked(sc); 207218065Sadrian if (bf == NULL) { /* out of buffers, cleanup */ 208218065Sadrian ath_txfrag_cleanup(sc, frags, ni); 209218065Sadrian break; 210218065Sadrian } 211218065Sadrian ieee80211_node_incref(ni); 212227344Sadrian TAILQ_INSERT_TAIL(frags, bf, bf_list); 213218065Sadrian } 214218065Sadrian ATH_TXBUF_UNLOCK(sc); 215218065Sadrian 216227344Sadrian return !TAILQ_EMPTY(frags); 217218065Sadrian} 218218065Sadrian 219218065Sadrian/* 220218065Sadrian * Reclaim mbuf resources. For fragmented frames we 221218065Sadrian * need to claim each frag chained with m_nextpkt. 222218065Sadrian */ 223218065Sadrianvoid 224218065Sadrianath_freetx(struct mbuf *m) 225218065Sadrian{ 226218065Sadrian struct mbuf *next; 227218065Sadrian 228218065Sadrian do { 229218065Sadrian next = m->m_nextpkt; 230218065Sadrian m->m_nextpkt = NULL; 231218065Sadrian m_freem(m); 232218065Sadrian } while ((m = next) != NULL); 233218065Sadrian} 234218065Sadrian 235218065Sadrianstatic int 236218065Sadrianath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0) 237218065Sadrian{ 238218065Sadrian struct mbuf *m; 239218065Sadrian int error; 240218065Sadrian 241218065Sadrian /* 242218065Sadrian * Load the DMA map so any coalescing is done. This 243218065Sadrian * also calculates the number of descriptors we need. 244218065Sadrian */ 245218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 246218065Sadrian bf->bf_segs, &bf->bf_nseg, 247218065Sadrian BUS_DMA_NOWAIT); 248218065Sadrian if (error == EFBIG) { 249218065Sadrian /* XXX packet requires too many descriptors */ 250218065Sadrian bf->bf_nseg = ATH_TXDESC+1; 251218065Sadrian } else if (error != 0) { 252218065Sadrian sc->sc_stats.ast_tx_busdma++; 253218065Sadrian ath_freetx(m0); 254218065Sadrian return error; 255218065Sadrian } 256218065Sadrian /* 257218065Sadrian * Discard null packets and check for packets that 258218065Sadrian * require too many TX descriptors. We try to convert 259218065Sadrian * the latter to a cluster. 260218065Sadrian */ 261218065Sadrian if (bf->bf_nseg > ATH_TXDESC) { /* too many desc's, linearize */ 262218065Sadrian sc->sc_stats.ast_tx_linear++; 263218065Sadrian m = m_collapse(m0, M_DONTWAIT, ATH_TXDESC); 264218065Sadrian if (m == NULL) { 265218065Sadrian ath_freetx(m0); 266218065Sadrian sc->sc_stats.ast_tx_nombuf++; 267218065Sadrian return ENOMEM; 268218065Sadrian } 269218065Sadrian m0 = m; 270218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 271218065Sadrian bf->bf_segs, &bf->bf_nseg, 272218065Sadrian BUS_DMA_NOWAIT); 273218065Sadrian if (error != 0) { 274218065Sadrian sc->sc_stats.ast_tx_busdma++; 275218065Sadrian ath_freetx(m0); 276218065Sadrian return error; 277218065Sadrian } 278218065Sadrian KASSERT(bf->bf_nseg <= ATH_TXDESC, 279218065Sadrian ("too many segments after defrag; nseg %u", bf->bf_nseg)); 280218065Sadrian } else if (bf->bf_nseg == 0) { /* null packet, discard */ 281218065Sadrian sc->sc_stats.ast_tx_nodata++; 282218065Sadrian ath_freetx(m0); 283218065Sadrian return EIO; 284218065Sadrian } 285218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", 286218065Sadrian __func__, m0, m0->m_pkthdr.len); 287218065Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 288218065Sadrian bf->bf_m = m0; 289218065Sadrian 290218065Sadrian return 0; 291218065Sadrian} 292218065Sadrian 293227360Sadrian/* 294227360Sadrian * Chain together segments+descriptors for a non-11n frame. 295227360Sadrian */ 296218065Sadrianstatic void 297227364Sadrianath_tx_chaindesclist(struct ath_softc *sc, struct ath_buf *bf) 298218065Sadrian{ 299218065Sadrian struct ath_hal *ah = sc->sc_ah; 300218065Sadrian struct ath_desc *ds, *ds0; 301218065Sadrian int i; 302218065Sadrian 303218065Sadrian /* 304218065Sadrian * Fillin the remainder of the descriptor info. 305218065Sadrian */ 306218065Sadrian ds0 = ds = bf->bf_desc; 307218065Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 308218065Sadrian ds->ds_data = bf->bf_segs[i].ds_addr; 309218065Sadrian if (i == bf->bf_nseg - 1) 310218065Sadrian ds->ds_link = 0; 311218065Sadrian else 312218065Sadrian ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 313218065Sadrian ath_hal_filltxdesc(ah, ds 314218065Sadrian , bf->bf_segs[i].ds_len /* segment length */ 315218065Sadrian , i == 0 /* first segment */ 316218065Sadrian , i == bf->bf_nseg - 1 /* last segment */ 317218065Sadrian , ds0 /* first descriptor */ 318218065Sadrian ); 319218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 320218065Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 321218065Sadrian __func__, i, ds->ds_link, ds->ds_data, 322218065Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 323227360Sadrian bf->bf_lastds = ds; 324218065Sadrian } 325218154Sadrian} 326218154Sadrian 327227364Sadrian/* 328227364Sadrian * Fill in the descriptor list for a aggregate subframe. 329227364Sadrian * 330227364Sadrian * The subframe is returned with the ds_link field in the last subframe 331227364Sadrian * pointing to 0. 332227364Sadrian */ 333218154Sadrianstatic void 334227364Sadrianath_tx_chaindesclist_subframe(struct ath_softc *sc, struct ath_buf *bf) 335218154Sadrian{ 336218154Sadrian struct ath_hal *ah = sc->sc_ah; 337227364Sadrian struct ath_desc *ds, *ds0; 338227364Sadrian int i; 339218154Sadrian 340227364Sadrian ds0 = ds = bf->bf_desc; 341218154Sadrian 342218065Sadrian /* 343227364Sadrian * There's no need to call ath_hal_setupfirsttxdesc here; 344227364Sadrian * That's only going to occur for the first frame in an aggregate. 345227364Sadrian */ 346227364Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 347227364Sadrian ds->ds_data = bf->bf_segs[i].ds_addr; 348227364Sadrian if (i == bf->bf_nseg - 1) 349227364Sadrian ds->ds_link = 0; 350227364Sadrian else 351227364Sadrian ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 352227364Sadrian 353227364Sadrian /* 354227364Sadrian * This performs the setup for an aggregate frame. 355227364Sadrian * This includes enabling the aggregate flags if needed. 356227364Sadrian */ 357227364Sadrian ath_hal_chaintxdesc(ah, ds, 358227364Sadrian bf->bf_state.bfs_pktlen, 359227364Sadrian bf->bf_state.bfs_hdrlen, 360227364Sadrian HAL_PKT_TYPE_AMPDU, /* forces aggregate bits to be set */ 361227364Sadrian bf->bf_state.bfs_keyix, 362227364Sadrian 0, /* cipher, calculated from keyix */ 363227364Sadrian bf->bf_state.bfs_ndelim, 364227364Sadrian bf->bf_segs[i].ds_len, /* segment length */ 365227364Sadrian i == 0, /* first segment */ 366227364Sadrian i == bf->bf_nseg - 1 /* last segment */ 367227364Sadrian ); 368227364Sadrian 369227364Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 370227364Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 371227364Sadrian __func__, i, ds->ds_link, ds->ds_data, 372227364Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 373227364Sadrian bf->bf_lastds = ds; 374227364Sadrian } 375227364Sadrian} 376227364Sadrian 377227364Sadrian/* 378227364Sadrian * Setup segments+descriptors for an 11n aggregate. 379227364Sadrian * bf_first is the first buffer in the aggregate. 380227364Sadrian * The descriptor list must already been linked together using 381227364Sadrian * bf->bf_next. 382227364Sadrian */ 383227364Sadrianstatic void 384227364Sadrianath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first) 385227364Sadrian{ 386227364Sadrian struct ath_buf *bf, *bf_prev = NULL; 387227364Sadrian 388227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n", 389227364Sadrian __func__, bf_first->bf_state.bfs_nframes, 390227364Sadrian bf_first->bf_state.bfs_al); 391227364Sadrian 392227364Sadrian /* 393227364Sadrian * Setup all descriptors of all subframes. 394227364Sadrian */ 395227364Sadrian bf = bf_first; 396227364Sadrian while (bf != NULL) { 397227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 398227364Sadrian "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n", 399227364Sadrian __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen, 400227364Sadrian SEQNO(bf->bf_state.bfs_seqno)); 401227364Sadrian 402227364Sadrian /* Sub-frame setup */ 403227364Sadrian ath_tx_chaindesclist_subframe(sc, bf); 404227364Sadrian 405227364Sadrian /* 406227364Sadrian * Link the last descriptor of the previous frame 407227364Sadrian * to the beginning descriptor of this frame. 408227364Sadrian */ 409227364Sadrian if (bf_prev != NULL) 410227364Sadrian bf_prev->bf_lastds->ds_link = bf->bf_daddr; 411227364Sadrian 412227364Sadrian /* Save a copy so we can link the next descriptor in */ 413227364Sadrian bf_prev = bf; 414227364Sadrian bf = bf->bf_next; 415227364Sadrian } 416227364Sadrian 417227364Sadrian /* 418227364Sadrian * Setup first descriptor of first frame. 419227364Sadrian * chaintxdesc() overwrites the descriptor entries; 420227364Sadrian * setupfirsttxdesc() merges in things. 421227364Sadrian * Otherwise various fields aren't set correctly (eg flags). 422227364Sadrian */ 423227364Sadrian ath_hal_setupfirsttxdesc(sc->sc_ah, 424227364Sadrian bf_first->bf_desc, 425227364Sadrian bf_first->bf_state.bfs_al, 426227364Sadrian bf_first->bf_state.bfs_flags | HAL_TXDESC_INTREQ, 427227364Sadrian bf_first->bf_state.bfs_txpower, 428227364Sadrian bf_first->bf_state.bfs_txrate0, 429227364Sadrian bf_first->bf_state.bfs_try0, 430227364Sadrian bf_first->bf_state.bfs_txantenna, 431227364Sadrian bf_first->bf_state.bfs_ctsrate, 432227364Sadrian bf_first->bf_state.bfs_ctsduration); 433227364Sadrian 434227364Sadrian /* 435227364Sadrian * Setup the last descriptor in the list. 436227364Sadrian * bf_prev points to the last; bf is NULL here. 437227364Sadrian */ 438229949Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_desc, 439229949Sadrian bf_first->bf_desc); 440227364Sadrian 441227364Sadrian /* 442227364Sadrian * Set the first descriptor bf_lastds field to point to 443227364Sadrian * the last descriptor in the last subframe, that's where 444227364Sadrian * the status update will occur. 445227364Sadrian */ 446227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 447227364Sadrian 448227364Sadrian /* 449227364Sadrian * And bf_last in the first descriptor points to the end of 450227364Sadrian * the aggregate list. 451227364Sadrian */ 452227364Sadrian bf_first->bf_last = bf_prev; 453227364Sadrian 454227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 455227364Sadrian} 456227364Sadrian 457227364Sadrianstatic void 458227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 459227364Sadrian struct ath_buf *bf) 460227364Sadrian{ 461227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 462227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 463227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 464227364Sadrian if (txq->axq_link != NULL) { 465227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 466227364Sadrian struct ieee80211_frame *wh; 467227364Sadrian 468227364Sadrian /* mark previous frame */ 469227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 470227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 471227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 472227364Sadrian BUS_DMASYNC_PREWRITE); 473227364Sadrian 474227364Sadrian /* link descriptor */ 475227364Sadrian *txq->axq_link = bf->bf_daddr; 476227364Sadrian } 477227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 478227364Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 479227364Sadrian} 480227364Sadrian 481227364Sadrian/* 482227364Sadrian * Hand-off packet to a hardware queue. 483227364Sadrian */ 484227364Sadrianstatic void 485229949Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, 486229949Sadrian struct ath_buf *bf) 487227364Sadrian{ 488227364Sadrian struct ath_hal *ah = sc->sc_ah; 489227364Sadrian 490227364Sadrian /* 491218065Sadrian * Insert the frame on the outbound list and pass it on 492218065Sadrian * to the hardware. Multicast frames buffered for power 493218065Sadrian * save stations and transmit from the CAB queue are stored 494218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 495218065Sadrian * the SWBA handler since frames only go out on DTIM and 496218065Sadrian * to avoid possible races. 497218065Sadrian */ 498227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 499218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 500227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 501227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 502227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 503227364Sadrian 504227651Sadrian#if 0 505227651Sadrian /* 506227651Sadrian * This causes a LOR. Find out where the PCU lock is being 507227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 508227651Sadrian * be occuring. 509227651Sadrian */ 510227651Sadrian ATH_PCU_LOCK(sc); 511227651Sadrian if (sc->sc_inreset_cnt) { 512227651Sadrian ATH_PCU_UNLOCK(sc); 513227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 514227651Sadrian "%s: called with sc_in_reset != 0\n", 515227651Sadrian __func__); 516227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 517227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 518227651Sadrian __func__, txq->axq_qnum, 519227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 520227651Sadrian txq->axq_depth); 521227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 522227651Sadrian if (bf->bf_state.bfs_aggr) 523227651Sadrian txq->axq_aggr_depth++; 524227651Sadrian /* 525227651Sadrian * There's no need to update axq_link; the hardware 526227651Sadrian * is in reset and once the reset is complete, any 527227651Sadrian * non-empty queues will simply have DMA restarted. 528227651Sadrian */ 529227651Sadrian return; 530227651Sadrian } 531227651Sadrian ATH_PCU_UNLOCK(sc); 532227651Sadrian#endif 533227651Sadrian 534227364Sadrian /* For now, so not to generate whitespace diffs */ 535227364Sadrian if (1) { 536218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 537218065Sadrian int qbusy; 538218065Sadrian 539218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 540218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 541218065Sadrian if (txq->axq_link == NULL) { 542218065Sadrian /* 543218065Sadrian * Be careful writing the address to TXDP. If 544218065Sadrian * the tx q is enabled then this write will be 545218065Sadrian * ignored. Normally this is not an issue but 546218065Sadrian * when tdma is in use and the q is beacon gated 547218065Sadrian * this race can occur. If the q is busy then 548218065Sadrian * defer the work to later--either when another 549218065Sadrian * packet comes along or when we prepare a beacon 550218065Sadrian * frame at SWBA. 551218065Sadrian */ 552218065Sadrian if (!qbusy) { 553229949Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 554229949Sadrian bf->bf_daddr); 555218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 556218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 557218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 558218065Sadrian __func__, txq->axq_qnum, 559218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 560218065Sadrian txq->axq_depth); 561218065Sadrian } else { 562218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 563218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 564218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 565218065Sadrian txq->axq_qnum); 566218065Sadrian } 567218065Sadrian } else { 568218065Sadrian *txq->axq_link = bf->bf_daddr; 569218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 570218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 571218065Sadrian txq->axq_qnum, txq->axq_link, 572229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 573229949Sadrian txq->axq_depth); 574218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 575218065Sadrian /* 576218065Sadrian * The q was busy when we previously tried 577218065Sadrian * to write the address of the first buffer 578218065Sadrian * in the chain. Since it's not busy now 579218065Sadrian * handle this chore. We are certain the 580218065Sadrian * buffer at the front is the right one since 581218065Sadrian * axq_link is NULL only when the buffer list 582218065Sadrian * is/was empty. 583218065Sadrian */ 584218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 585227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 586218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 587218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 588218065Sadrian "%s: Q%u restarted\n", __func__, 589218065Sadrian txq->axq_qnum); 590218065Sadrian } 591218065Sadrian } 592218065Sadrian#else 593218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 594218065Sadrian if (txq->axq_link == NULL) { 595218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 596218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 597218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 598218065Sadrian __func__, txq->axq_qnum, 599218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 600218065Sadrian txq->axq_depth); 601218065Sadrian } else { 602218065Sadrian *txq->axq_link = bf->bf_daddr; 603218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 604218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 605218065Sadrian txq->axq_qnum, txq->axq_link, 606229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 607229949Sadrian txq->axq_depth); 608218065Sadrian } 609218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 610227360Sadrian if (bf->bf_state.bfs_aggr) 611227360Sadrian txq->axq_aggr_depth++; 612227360Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 613218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 614227364Sadrian } 615227364Sadrian} 616218065Sadrian 617227364Sadrian/* 618227364Sadrian * Restart TX DMA for the given TXQ. 619227364Sadrian * 620227364Sadrian * This must be called whether the queue is empty or not. 621227364Sadrian */ 622227364Sadrianvoid 623227364Sadrianath_txq_restart_dma(struct ath_softc *sc, struct ath_txq *txq) 624227364Sadrian{ 625227364Sadrian struct ath_hal *ah = sc->sc_ah; 626232707Sadrian struct ath_buf *bf, *bf_last; 627218065Sadrian 628227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 629227364Sadrian 630227364Sadrian /* This is always going to be cleared, empty or not */ 631227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 632227364Sadrian 633232707Sadrian /* XXX make this ATH_TXQ_FIRST */ 634227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 635232707Sadrian bf_last = ATH_TXQ_LAST(txq, axq_q_s); 636232707Sadrian 637227364Sadrian if (bf == NULL) 638227364Sadrian return; 639227364Sadrian 640227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 641232707Sadrian txq->axq_link = &bf_last->bf_lastds->ds_link; 642227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 643218065Sadrian} 644218065Sadrian 645227364Sadrian/* 646227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 647227364Sadrian * 648227364Sadrian * The relevant hardware txq should be locked. 649227364Sadrian */ 650227364Sadrianstatic void 651227364Sadrianath_tx_handoff(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf) 652227364Sadrian{ 653227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 654227364Sadrian 655227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 656227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 657227364Sadrian else 658227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 659227364Sadrian} 660227364Sadrian 661218154Sadrianstatic int 662218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 663229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 664229949Sadrian int *keyix) 665218154Sadrian{ 666233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 667233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 668233330Sadrian __func__, 669233330Sadrian *hdrlen, 670233330Sadrian *pktlen, 671233330Sadrian isfrag, 672233330Sadrian iswep, 673233330Sadrian m0); 674233330Sadrian 675218154Sadrian if (iswep) { 676218154Sadrian const struct ieee80211_cipher *cip; 677218154Sadrian struct ieee80211_key *k; 678218154Sadrian 679218154Sadrian /* 680218154Sadrian * Construct the 802.11 header+trailer for an encrypted 681218154Sadrian * frame. The only reason this can fail is because of an 682218154Sadrian * unknown or unsupported cipher/key type. 683218154Sadrian */ 684218154Sadrian k = ieee80211_crypto_encap(ni, m0); 685218154Sadrian if (k == NULL) { 686218154Sadrian /* 687218154Sadrian * This can happen when the key is yanked after the 688218154Sadrian * frame was queued. Just discard the frame; the 689218154Sadrian * 802.11 layer counts failures and provides 690218154Sadrian * debugging/diagnostics. 691218154Sadrian */ 692229949Sadrian return (0); 693218154Sadrian } 694218154Sadrian /* 695218154Sadrian * Adjust the packet + header lengths for the crypto 696218154Sadrian * additions and calculate the h/w key index. When 697218154Sadrian * a s/w mic is done the frame will have had any mic 698218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 699218154Sadrian * account for it. Otherwise we need to add it to the 700218154Sadrian * packet length. 701218154Sadrian */ 702218154Sadrian cip = k->wk_cipher; 703218154Sadrian (*hdrlen) += cip->ic_header; 704218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 705218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 706218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 707218154Sadrian (*pktlen) += cip->ic_miclen; 708218154Sadrian (*keyix) = k->wk_keyix; 709218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 710218154Sadrian /* 711218154Sadrian * Use station key cache slot, if assigned. 712218154Sadrian */ 713218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 714218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 715218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 716218154Sadrian } else 717218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 718218154Sadrian 719229949Sadrian return (1); 720218154Sadrian} 721218154Sadrian 722218932Sadrianstatic uint8_t 723218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 724227364Sadrian int cix, int shortPreamble) 725218157Sadrian{ 726218932Sadrian uint8_t ctsrate; 727218932Sadrian 728218157Sadrian /* 729218157Sadrian * CTS transmit rate is derived from the transmit rate 730218157Sadrian * by looking in the h/w rate table. We must also factor 731218157Sadrian * in whether or not a short preamble is to be used. 732218157Sadrian */ 733218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 734218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 735218932Sadrian ctsrate = rt->info[cix].rateCode; 736218932Sadrian 737218932Sadrian /* XXX this should only matter for legacy rates */ 738218932Sadrian if (shortPreamble) 739218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 740218932Sadrian 741229949Sadrian return (ctsrate); 742218932Sadrian} 743218932Sadrian 744218932Sadrian/* 745218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 746218932Sadrian */ 747218932Sadrianstatic int 748218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 749218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 750218932Sadrian int flags) 751218932Sadrian{ 752218932Sadrian int ctsduration = 0; 753218932Sadrian 754218932Sadrian /* This mustn't be called for HT modes */ 755218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 756218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 757218932Sadrian __func__, rt->info[cix].rateCode); 758229949Sadrian return (-1); 759218932Sadrian } 760218932Sadrian 761218157Sadrian /* 762218157Sadrian * Compute the transmit duration based on the frame 763218157Sadrian * size and the size of an ACK frame. We call into the 764218157Sadrian * HAL to do the computation since it depends on the 765218157Sadrian * characteristics of the actual PHY being used. 766218157Sadrian * 767218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 768218157Sadrian * use the precalculated ACK durations. 769218157Sadrian */ 770218157Sadrian if (shortPreamble) { 771218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 772218932Sadrian ctsduration += rt->info[cix].spAckDuration; 773218932Sadrian ctsduration += ath_hal_computetxtime(ah, 774218157Sadrian rt, pktlen, rix, AH_TRUE); 775218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 776218932Sadrian ctsduration += rt->info[rix].spAckDuration; 777218157Sadrian } else { 778218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 779218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 780218932Sadrian ctsduration += ath_hal_computetxtime(ah, 781218157Sadrian rt, pktlen, rix, AH_FALSE); 782218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 783218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 784218157Sadrian } 785218932Sadrian 786229949Sadrian return (ctsduration); 787218157Sadrian} 788218157Sadrian 789227364Sadrian/* 790227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 791227364Sadrian * values. 792227364Sadrian * 793227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 794227364Sadrian * and cts duration must be re-calculated. 795227364Sadrian * 796227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 797227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 798227364Sadrian * 799227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 800227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 801227364Sadrian */ 802227364Sadrianstatic void 803227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 804218065Sadrian{ 805227364Sadrian uint16_t ctsduration = 0; 806227364Sadrian uint8_t ctsrate = 0; 807227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 808227364Sadrian uint8_t cix = 0; 809227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 810227364Sadrian 811227364Sadrian /* 812227364Sadrian * No RTS/CTS enabled? Don't bother. 813227364Sadrian */ 814227364Sadrian if ((bf->bf_state.bfs_flags & 815227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 816227364Sadrian /* XXX is this really needed? */ 817227364Sadrian bf->bf_state.bfs_ctsrate = 0; 818227364Sadrian bf->bf_state.bfs_ctsduration = 0; 819227364Sadrian return; 820227364Sadrian } 821227364Sadrian 822227364Sadrian /* 823227364Sadrian * If protection is enabled, use the protection rix control 824227364Sadrian * rate. Otherwise use the rate0 control rate. 825227364Sadrian */ 826227364Sadrian if (bf->bf_state.bfs_doprot) 827227364Sadrian rix = sc->sc_protrix; 828227364Sadrian else 829227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 830227364Sadrian 831227364Sadrian /* 832227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 833227364Sadrian * use it. 834227364Sadrian */ 835227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 836227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 837227364Sadrian else 838227364Sadrian /* Control rate from above */ 839227364Sadrian cix = rt->info[rix].controlRate; 840227364Sadrian 841227364Sadrian /* Calculate the rtscts rate for the given cix */ 842227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 843227364Sadrian bf->bf_state.bfs_shpream); 844227364Sadrian 845227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 846227364Sadrian if (! ath_tx_is_11n(sc)) 847227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 848227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 849227364Sadrian rt, bf->bf_state.bfs_flags); 850227364Sadrian 851227364Sadrian /* Squirrel away in ath_buf */ 852227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 853227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 854227364Sadrian 855227364Sadrian /* 856227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 857227364Sadrian * XXX TODO: only for pre-11n NICs. 858227364Sadrian */ 859227364Sadrian bf->bf_state.bfs_ismrr = 0; 860227364Sadrian bf->bf_state.bfs_try0 = 861227364Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 862227364Sadrian} 863227364Sadrian 864227364Sadrian/* 865227364Sadrian * Setup the descriptor chain for a normal or fast-frame 866227364Sadrian * frame. 867227364Sadrian */ 868227364Sadrianstatic void 869227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 870227364Sadrian{ 871227364Sadrian struct ath_desc *ds = bf->bf_desc; 872227364Sadrian struct ath_hal *ah = sc->sc_ah; 873227364Sadrian 874227364Sadrian ath_hal_setuptxdesc(ah, ds 875227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 876227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 877227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 878227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 879227364Sadrian , bf->bf_state.bfs_txrate0 880227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 881227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 882227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 883227364Sadrian , bf->bf_state.bfs_flags /* flags */ 884227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 885227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 886227364Sadrian ); 887227364Sadrian 888227364Sadrian /* 889227364Sadrian * This will be overriden when the descriptor chain is written. 890227364Sadrian */ 891227364Sadrian bf->bf_lastds = ds; 892227364Sadrian bf->bf_last = bf; 893227364Sadrian 894227364Sadrian /* XXX TODO: Setup descriptor chain */ 895227364Sadrian} 896227364Sadrian 897227364Sadrian/* 898227364Sadrian * Do a rate lookup. 899227364Sadrian * 900227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 901227364Sadrian * Non-data frames and raw frames don't require it. 902227364Sadrian * 903227364Sadrian * This populates the primary and MRR entries; MRR values are 904227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 905227364Sadrian * pre-11n chipsets. 906227364Sadrian * 907227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 908227364Sadrian * as they may depend upon the rate chosen. 909227364Sadrian */ 910227364Sadrianstatic void 911227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 912227364Sadrian{ 913227364Sadrian uint8_t rate, rix; 914227364Sadrian int try0; 915227364Sadrian 916227364Sadrian if (! bf->bf_state.bfs_doratelookup) 917227364Sadrian return; 918227364Sadrian 919227364Sadrian /* Get rid of any previous state */ 920227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 921227364Sadrian 922227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 923227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 924227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 925227364Sadrian 926227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 927227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 928227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 929227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 930227364Sadrian 931227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 932227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 933227364Sadrian bf->bf_state.bfs_rc); 934227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 935227364Sadrian 936227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 937227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 938227364Sadrian bf->bf_state.bfs_try0 = try0; 939227364Sadrian bf->bf_state.bfs_txrate0 = rate; 940227364Sadrian} 941227364Sadrian 942227364Sadrian/* 943227364Sadrian * Set the rate control fields in the given descriptor based on 944227364Sadrian * the bf_state fields and node state. 945227364Sadrian * 946227364Sadrian * The bfs fields should already be set with the relevant rate 947227364Sadrian * control information, including whether MRR is to be enabled. 948227364Sadrian * 949227364Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 950227364Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 951227364Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 952227364Sadrian * unconditionally for 11n chips. These require the 11n rate 953227364Sadrian * scenario to be set if MCS rates are enabled, so it's easier 954227364Sadrian * to just always call it. The caller can then only set rates 2, 3 955227364Sadrian * and 4 if multi-rate retry is needed. 956227364Sadrian */ 957227364Sadrianstatic void 958227364Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 959227364Sadrian struct ath_buf *bf) 960227364Sadrian{ 961227364Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 962227364Sadrian 963227364Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 964227364Sadrian if (! bf->bf_state.bfs_ismrr) 965227364Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 966227364Sadrian 967227364Sadrian /* 968227364Sadrian * Always call - that way a retried descriptor will 969227364Sadrian * have the MRR fields overwritten. 970227364Sadrian * 971227364Sadrian * XXX TODO: see if this is really needed - setting up 972227364Sadrian * the first descriptor should set the MRR fields to 0 973227364Sadrian * for us anyway. 974227364Sadrian */ 975227364Sadrian if (ath_tx_is_11n(sc)) { 976227364Sadrian ath_buf_set_rate(sc, ni, bf); 977227364Sadrian } else { 978227364Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 979227364Sadrian , rc[1].ratecode, rc[1].tries 980227364Sadrian , rc[2].ratecode, rc[2].tries 981227364Sadrian , rc[3].ratecode, rc[3].tries 982227364Sadrian ); 983227364Sadrian } 984227364Sadrian} 985227364Sadrian 986227364Sadrian/* 987227364Sadrian * Transmit the given frame to the hardware. 988227364Sadrian * 989227364Sadrian * The frame must already be setup; rate control must already have 990227364Sadrian * been done. 991227364Sadrian * 992227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 993227364Sadrian * it for this long when not doing software aggregation), later on 994227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 995227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 996227364Sadrian */ 997227364Sadrianstatic void 998227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 999227364Sadrian struct ath_buf *bf) 1000227364Sadrian{ 1001227364Sadrian 1002227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1003227364Sadrian 1004227364Sadrian /* Setup the descriptor before handoff */ 1005227364Sadrian ath_tx_do_ratelookup(sc, bf); 1006227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1007227364Sadrian ath_tx_set_rtscts(sc, bf); 1008227364Sadrian ath_tx_setds(sc, bf); 1009227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1010227364Sadrian ath_tx_chaindesclist(sc, bf); 1011227364Sadrian 1012227364Sadrian /* Hand off to hardware */ 1013227364Sadrian ath_tx_handoff(sc, txq, bf); 1014227364Sadrian} 1015227364Sadrian 1016227364Sadrian 1017227364Sadrian 1018227364Sadrianstatic int 1019227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1020227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1021227364Sadrian{ 1022218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1023218065Sadrian struct ath_vap *avp = ATH_VAP(vap); 1024218065Sadrian struct ath_hal *ah = sc->sc_ah; 1025218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1026218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1027218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1028218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1029227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1030227364Sadrian u_int8_t rix = 0, txrate = 0; 1031218065Sadrian struct ath_desc *ds; 1032218065Sadrian struct ath_txq *txq; 1033218065Sadrian struct ieee80211_frame *wh; 1034227364Sadrian u_int subtype, flags; 1035218065Sadrian HAL_PKT_TYPE atype; 1036218065Sadrian const HAL_RATE_TABLE *rt; 1037218065Sadrian HAL_BOOL shortPreamble; 1038218065Sadrian struct ath_node *an; 1039218065Sadrian u_int pri; 1040218065Sadrian 1041218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1042218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1043218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1044218065Sadrian isfrag = m0->m_flags & M_FRAG; 1045218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1046218065Sadrian /* 1047218065Sadrian * Packet length must not include any 1048218065Sadrian * pad bytes; deduct them here. 1049218065Sadrian */ 1050218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1051218065Sadrian 1052218154Sadrian /* Handle encryption twiddling if needed */ 1053227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1054227364Sadrian &pktlen, &keyix)) { 1055218154Sadrian ath_freetx(m0); 1056218154Sadrian return EIO; 1057218154Sadrian } 1058218065Sadrian 1059218154Sadrian /* packet header may have moved, reset our local pointer */ 1060218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1061218065Sadrian 1062218065Sadrian pktlen += IEEE80211_CRC_LEN; 1063218065Sadrian 1064218065Sadrian /* 1065218065Sadrian * Load the DMA map so any coalescing is done. This 1066218065Sadrian * also calculates the number of descriptors we need. 1067218065Sadrian */ 1068218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1069218065Sadrian if (error != 0) 1070218065Sadrian return error; 1071218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1072218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1073218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1074218065Sadrian 1075218065Sadrian /* setup descriptors */ 1076218065Sadrian ds = bf->bf_desc; 1077218065Sadrian rt = sc->sc_currates; 1078218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1079218065Sadrian 1080218065Sadrian /* 1081218065Sadrian * NB: the 802.11 layer marks whether or not we should 1082218065Sadrian * use short preamble based on the current mode and 1083218065Sadrian * negotiated parameters. 1084218065Sadrian */ 1085218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1086218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1087218065Sadrian shortPreamble = AH_TRUE; 1088218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1089218065Sadrian } else { 1090218065Sadrian shortPreamble = AH_FALSE; 1091218065Sadrian } 1092218065Sadrian 1093218065Sadrian an = ATH_NODE(ni); 1094218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1095218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1096218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1097218065Sadrian /* XXX use txparams instead of fixed values */ 1098218065Sadrian /* 1099218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1100218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1101218065Sadrian */ 1102218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1103218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1104218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1105218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1106218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1107218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1108218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1109218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1110218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1111218065Sadrian else 1112218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1113218065Sadrian rix = an->an_mgmtrix; 1114218065Sadrian txrate = rt->info[rix].rateCode; 1115218065Sadrian if (shortPreamble) 1116218065Sadrian txrate |= rt->info[rix].shortPreamble; 1117218065Sadrian try0 = ATH_TXMGTTRY; 1118218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1119218065Sadrian break; 1120218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1121218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1122218065Sadrian rix = an->an_mgmtrix; 1123218065Sadrian txrate = rt->info[rix].rateCode; 1124218065Sadrian if (shortPreamble) 1125218065Sadrian txrate |= rt->info[rix].shortPreamble; 1126218065Sadrian try0 = ATH_TXMGTTRY; 1127218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1128218065Sadrian break; 1129218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1130218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1131218065Sadrian /* 1132218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1133218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1134218065Sadrian * the rate control module for the rate to use. 1135218065Sadrian */ 1136218065Sadrian if (ismcast) { 1137218065Sadrian rix = an->an_mcastrix; 1138218065Sadrian txrate = rt->info[rix].rateCode; 1139218065Sadrian if (shortPreamble) 1140218065Sadrian txrate |= rt->info[rix].shortPreamble; 1141218065Sadrian try0 = 1; 1142218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1143218065Sadrian /* XXX? maybe always use long preamble? */ 1144218065Sadrian rix = an->an_mgmtrix; 1145218065Sadrian txrate = rt->info[rix].rateCode; 1146218065Sadrian if (shortPreamble) 1147218065Sadrian txrate |= rt->info[rix].shortPreamble; 1148218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1149218065Sadrian } else { 1150227364Sadrian /* 1151227364Sadrian * Do rate lookup on each TX, rather than using 1152227364Sadrian * the hard-coded TX information decided here. 1153227364Sadrian */ 1154227364Sadrian ismrr = 1; 1155227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1156218065Sadrian } 1157218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1158218065Sadrian flags |= HAL_TXDESC_NOACK; 1159218065Sadrian break; 1160218065Sadrian default: 1161218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1162218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1163218065Sadrian /* XXX statistic */ 1164218065Sadrian ath_freetx(m0); 1165218065Sadrian return EIO; 1166218065Sadrian } 1167218065Sadrian txq = sc->sc_ac2q[pri]; 1168218065Sadrian 1169218065Sadrian /* 1170218065Sadrian * When servicing one or more stations in power-save mode 1171218065Sadrian * (or) if there is some mcast data waiting on the mcast 1172218065Sadrian * queue (to prevent out of order delivery) multicast 1173218065Sadrian * frames must be buffered until after the beacon. 1174232753Sadrian * 1175232753Sadrian * XXX This likely means that if there's a station in power 1176232753Sadrian * save mode, we won't be doing any kind of aggregation towards 1177232753Sadrian * anyone. This is likely a very suboptimal way of dealing 1178232753Sadrian * with things. 1179218065Sadrian */ 1180218065Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1181218065Sadrian txq = &avp->av_mcastq; 1182218065Sadrian 1183218065Sadrian /* 1184218065Sadrian * Calculate miscellaneous flags. 1185218065Sadrian */ 1186218065Sadrian if (ismcast) { 1187218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1188218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1189218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1190218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1191218065Sadrian sc->sc_stats.ast_tx_rts++; 1192218065Sadrian } 1193218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1194218065Sadrian sc->sc_stats.ast_tx_noack++; 1195218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1196218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1197218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1198218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1199218065Sadrian sc->sc_stats.ast_tdma_ack++; 1200218065Sadrian ath_freetx(m0); 1201218065Sadrian return EIO; 1202218065Sadrian } 1203218065Sadrian#endif 1204218065Sadrian 1205218065Sadrian /* 1206218065Sadrian * If 802.11g protection is enabled, determine whether 1207218065Sadrian * to use RTS/CTS or just CTS. Note that this is only 1208218065Sadrian * done for OFDM unicast frames. 1209218065Sadrian */ 1210218065Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 1211218065Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 1212218065Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1213227364Sadrian bf->bf_state.bfs_doprot = 1; 1214218065Sadrian /* XXX fragments must use CCK rates w/ protection */ 1215227364Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 1216218065Sadrian flags |= HAL_TXDESC_RTSENA; 1217227364Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 1218218065Sadrian flags |= HAL_TXDESC_CTSENA; 1219227364Sadrian } 1220227364Sadrian /* 1221227364Sadrian * For frags it would be desirable to use the 1222227364Sadrian * highest CCK rate for RTS/CTS. But stations 1223227364Sadrian * farther away may detect it at a lower CCK rate 1224227364Sadrian * so use the configured protection rate instead 1225227364Sadrian * (for now). 1226227364Sadrian */ 1227218065Sadrian sc->sc_stats.ast_tx_protect++; 1228218065Sadrian } 1229218065Sadrian 1230220098Sadrian#if 0 1231218065Sadrian /* 1232220098Sadrian * If 11n protection is enabled and it's a HT frame, 1233220098Sadrian * enable RTS. 1234220098Sadrian * 1235220098Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 1236220098Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 1237220098Sadrian * XXX indicates it's not a HT pure environment? 1238220098Sadrian */ 1239220098Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 1240220098Sadrian rt->info[rix].phy == IEEE80211_T_HT && 1241220098Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1242220098Sadrian cix = rt->info[sc->sc_protrix].controlRate; 1243220098Sadrian flags |= HAL_TXDESC_RTSENA; 1244220098Sadrian sc->sc_stats.ast_tx_htprotect++; 1245220098Sadrian } 1246220098Sadrian#endif 1247220098Sadrian 1248220098Sadrian /* 1249218065Sadrian * Calculate duration. This logically belongs in the 802.11 1250218065Sadrian * layer but it lacks sufficient information to calculate it. 1251218065Sadrian */ 1252218065Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 1253218065Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 1254218065Sadrian u_int16_t dur; 1255218065Sadrian if (shortPreamble) 1256218065Sadrian dur = rt->info[rix].spAckDuration; 1257218065Sadrian else 1258218065Sadrian dur = rt->info[rix].lpAckDuration; 1259218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 1260218065Sadrian dur += dur; /* additional SIFS+ACK */ 1261218065Sadrian KASSERT(m0->m_nextpkt != NULL, ("no fragment")); 1262218065Sadrian /* 1263218065Sadrian * Include the size of next fragment so NAV is 1264218065Sadrian * updated properly. The last fragment uses only 1265218065Sadrian * the ACK duration 1266218065Sadrian */ 1267218065Sadrian dur += ath_hal_computetxtime(ah, rt, 1268218065Sadrian m0->m_nextpkt->m_pkthdr.len, 1269218065Sadrian rix, shortPreamble); 1270218065Sadrian } 1271218065Sadrian if (isfrag) { 1272218065Sadrian /* 1273218065Sadrian * Force hardware to use computed duration for next 1274218065Sadrian * fragment by disabling multi-rate retry which updates 1275218065Sadrian * duration based on the multi-rate duration table. 1276218065Sadrian */ 1277218065Sadrian ismrr = 0; 1278218065Sadrian try0 = ATH_TXMGTTRY; /* XXX? */ 1279218065Sadrian } 1280218065Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 1281218065Sadrian } 1282218065Sadrian 1283218065Sadrian /* 1284227364Sadrian * Determine if a tx interrupt should be generated for 1285227364Sadrian * this descriptor. We take a tx interrupt to reap 1286227364Sadrian * descriptors when the h/w hits an EOL condition or 1287227364Sadrian * when the descriptor is specifically marked to generate 1288227364Sadrian * an interrupt. We periodically mark descriptors in this 1289227364Sadrian * way to insure timely replenishing of the supply needed 1290227364Sadrian * for sending frames. Defering interrupts reduces system 1291227364Sadrian * load and potentially allows more concurrent work to be 1292227364Sadrian * done but if done to aggressively can cause senders to 1293227364Sadrian * backup. 1294227364Sadrian * 1295227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1296227364Sadrian * dynamically through sysctl. 1297218065Sadrian */ 1298227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1299227364Sadrian txq->axq_intrcnt = 0; 1300227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1301227364Sadrian flags |= HAL_TXDESC_INTREQ; 1302227364Sadrian txq->axq_intrcnt = 0; 1303227364Sadrian } 1304218932Sadrian 1305227364Sadrian /* This point forward is actual TX bits */ 1306218065Sadrian 1307218065Sadrian /* 1308218065Sadrian * At this point we are committed to sending the frame 1309218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1310218065Sadrian * case this frame is part of frag chain. 1311218065Sadrian */ 1312218065Sadrian m0->m_nextpkt = NULL; 1313218065Sadrian 1314218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1315218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1316218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1317218065Sadrian 1318218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1319218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1320218065Sadrian 1321218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1322218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1323218065Sadrian if (iswep) 1324218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1325218065Sadrian if (isfrag) 1326218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1327218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1328218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1329218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1330218065Sadrian 1331218065Sadrian ieee80211_radiotap_tx(vap, m0); 1332218065Sadrian } 1333218065Sadrian 1334227364Sadrian /* Blank the legacy rate array */ 1335227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1336227364Sadrian 1337218065Sadrian /* 1338227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1339227364Sadrian * the rate scenario. 1340227364Sadrian */ 1341227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1342227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1343227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1344227364Sadrian 1345227364Sadrian /* Store the decided rate index values away */ 1346227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1347227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1348227364Sadrian bf->bf_state.bfs_atype = atype; 1349227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1350227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1351227364Sadrian bf->bf_state.bfs_try0 = try0; 1352227364Sadrian bf->bf_state.bfs_keyix = keyix; 1353227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1354227364Sadrian bf->bf_state.bfs_flags = flags; 1355227364Sadrian bf->bf_txflags = flags; 1356227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1357227364Sadrian 1358227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1359227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1360227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1361227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1362227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1363227364Sadrian 1364227364Sadrian return 0; 1365227364Sadrian} 1366227364Sadrian 1367227364Sadrian/* 1368227364Sadrian * Direct-dispatch the current frame to the hardware. 1369227364Sadrian * 1370227364Sadrian * This can be called by the net80211 code. 1371227364Sadrian * 1372227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1373227364Sadrian * XXX aggregate scheduler so its serialised? 1374227364Sadrian */ 1375227364Sadrianint 1376227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1377227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1378227364Sadrian{ 1379227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1380227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1381232764Sadrian int r = 0; 1382227364Sadrian u_int pri; 1383227364Sadrian int tid; 1384227364Sadrian struct ath_txq *txq; 1385227364Sadrian int ismcast; 1386227364Sadrian const struct ieee80211_frame *wh; 1387227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1388233227Sadrian //ieee80211_seq seqno; 1389227364Sadrian uint8_t type, subtype; 1390227364Sadrian 1391227364Sadrian /* 1392227364Sadrian * Determine the target hardware queue. 1393218065Sadrian * 1394227364Sadrian * For multicast frames, the txq gets overridden to be the 1395227364Sadrian * software TXQ and it's done via direct-dispatch. 1396227364Sadrian * 1397227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1398227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1399227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1400227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1401227364Sadrian * having a node TID queued to multiple hardware TXQs. 1402227364Sadrian * This may change in the future but would require some locking 1403227364Sadrian * fudgery. 1404218065Sadrian */ 1405227364Sadrian pri = ath_tx_getac(sc, m0); 1406227364Sadrian tid = ath_tx_gettid(sc, m0); 1407218065Sadrian 1408227364Sadrian txq = sc->sc_ac2q[pri]; 1409227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1410227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1411227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1412227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1413227364Sadrian 1414232764Sadrian /* 1415232764Sadrian * Enforce how deep the multicast queue can grow. 1416232764Sadrian * 1417232764Sadrian * XXX duplicated in ath_raw_xmit(). 1418232764Sadrian */ 1419232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1420232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1421232764Sadrian 1422232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1423232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1424232764Sadrian r = ENOBUFS; 1425232764Sadrian } 1426232764Sadrian 1427232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1428232764Sadrian 1429232764Sadrian if (r != 0) { 1430232764Sadrian m_freem(m0); 1431232764Sadrian return r; 1432232764Sadrian } 1433232764Sadrian } 1434232764Sadrian 1435227364Sadrian /* A-MPDU TX */ 1436227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1437227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1438227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1439227364Sadrian 1440233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1441233227Sadrian "%s: bf=%p, tid=%d, ac=%d, is_ampdu=%d\n", 1442233227Sadrian __func__, bf, tid, pri, is_ampdu); 1443227364Sadrian 1444227364Sadrian /* Multicast frames go onto the software multicast queue */ 1445227364Sadrian if (ismcast) 1446227364Sadrian txq = &avp->av_mcastq; 1447227364Sadrian 1448232753Sadrian /* 1449232753Sadrian * XXX This likely means that if there's a station in power 1450232753Sadrian * save mode, we won't be doing any kind of aggregation towards 1451232753Sadrian * anyone. This is likely a very suboptimal way of dealing 1452232753Sadrian * with things. 1453232753Sadrian */ 1454227364Sadrian if ((! is_ampdu) && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1455227364Sadrian txq = &avp->av_mcastq; 1456227364Sadrian 1457227364Sadrian /* Do the generic frame setup */ 1458227364Sadrian /* XXX should just bzero the bf_state? */ 1459227364Sadrian bf->bf_state.bfs_dobaw = 0; 1460233227Sadrian bf->bf_state.bfs_seqno_assigned = 0; 1461233227Sadrian bf->bf_state.bfs_need_seqno = 0; 1462233227Sadrian bf->bf_state.bfs_seqno = -1; /* XXX debugging */ 1463227364Sadrian 1464227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1465227364Sadrian /* Don't do it whilst pending; the net80211 layer still assigns them */ 1466227364Sadrian /* XXX do we need locking here? */ 1467227364Sadrian if (is_ampdu_tx) { 1468227364Sadrian ATH_TXQ_LOCK(txq); 1469227364Sadrian /* 1470227364Sadrian * Always call; this function will 1471227364Sadrian * handle making sure that null data frames 1472227364Sadrian * don't get a sequence number from the current 1473227364Sadrian * TID and thus mess with the BAW. 1474227364Sadrian */ 1475233227Sadrian //seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1476233227Sadrian if (ath_tx_seqno_required(sc, ni, bf, m0)) { 1477227364Sadrian bf->bf_state.bfs_dobaw = 1; 1478233227Sadrian bf->bf_state.bfs_need_seqno = 1; 1479227364Sadrian } 1480227364Sadrian ATH_TXQ_UNLOCK(txq); 1481233227Sadrian } else { 1482233227Sadrian /* No AMPDU TX, we've been assigned a sequence number. */ 1483233227Sadrian if (IEEE80211_QOS_HAS_SEQ(wh)) { 1484233227Sadrian bf->bf_state.bfs_seqno_assigned = 1; 1485233330Sadrian /* XXX we should store the frag+seqno in bfs_seqno */ 1486233227Sadrian bf->bf_state.bfs_seqno = 1487233227Sadrian M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1488233227Sadrian } 1489218240Sadrian } 1490218240Sadrian 1491218065Sadrian /* 1492227364Sadrian * If needed, the sequence number has been assigned. 1493227364Sadrian * Squirrel it away somewhere easy to get to. 1494218065Sadrian */ 1495233227Sadrian //bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1496227364Sadrian 1497227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1498227364Sadrian if (is_ampdu_pending) 1499227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1500227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1501227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1502227364Sadrian 1503227364Sadrian /* This also sets up the DMA map */ 1504227364Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0); 1505227364Sadrian 1506227364Sadrian if (r != 0) 1507227364Sadrian return r; 1508227364Sadrian 1509227364Sadrian /* At this point m0 could have changed! */ 1510227364Sadrian m0 = bf->bf_m; 1511227364Sadrian 1512233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1513233227Sadrian "%s: DONE: bf=%p, tid=%d, ac=%d, is_ampdu=%d, dobaw=%d, seqno=%d\n", 1514233227Sadrian __func__, bf, tid, pri, is_ampdu, bf->bf_state.bfs_dobaw, M_SEQNO_GET(m0)); 1515233227Sadrian 1516227364Sadrian#if 1 1517218065Sadrian /* 1518227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1519227364Sadrian * destination hardware queue. Don't bother software 1520227364Sadrian * queuing it. 1521218065Sadrian */ 1522227364Sadrian /* 1523227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1524227364Sadrian * destination hardware queue. Don't bother software 1525227364Sadrian * queuing it, as the TID will now be paused. 1526227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1527227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1528227364Sadrian * It queues directly to hardware because the TID is paused 1529227364Sadrian * at this point (and won't be unpaused until the BAR has 1530227364Sadrian * either been TXed successfully or max retries has been 1531227364Sadrian * reached.) 1532227364Sadrian */ 1533227364Sadrian if (txq == &avp->av_mcastq) { 1534233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 1535233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1536227364Sadrian ATH_TXQ_LOCK(txq); 1537227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1538227364Sadrian ATH_TXQ_UNLOCK(txq); 1539227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1540227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1541227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 1542227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1543227364Sadrian ATH_TXQ_LOCK(txq); 1544227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1545227364Sadrian ATH_TXQ_UNLOCK(txq); 1546227364Sadrian } else { 1547227364Sadrian /* add to software queue */ 1548233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 1549233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1550227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1551227364Sadrian } 1552227364Sadrian#else 1553227364Sadrian /* 1554227364Sadrian * For now, since there's no software queue, 1555227364Sadrian * direct-dispatch to the hardware. 1556227364Sadrian */ 1557227364Sadrian ATH_TXQ_LOCK(txq); 1558227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1559227364Sadrian ATH_TXQ_UNLOCK(txq); 1560227364Sadrian#endif 1561218065Sadrian 1562218065Sadrian return 0; 1563218065Sadrian} 1564218065Sadrian 1565218065Sadrianstatic int 1566218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1567218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1568218065Sadrian const struct ieee80211_bpf_params *params) 1569218065Sadrian{ 1570218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1571218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1572218065Sadrian struct ath_hal *ah = sc->sc_ah; 1573218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1574218065Sadrian int error, ismcast, ismrr; 1575218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1576227364Sadrian u_int8_t rix, txrate; 1577218065Sadrian struct ieee80211_frame *wh; 1578227364Sadrian u_int flags; 1579218065Sadrian HAL_PKT_TYPE atype; 1580218065Sadrian const HAL_RATE_TABLE *rt; 1581218065Sadrian struct ath_desc *ds; 1582218065Sadrian u_int pri; 1583227364Sadrian int o_tid = -1; 1584227364Sadrian int do_override; 1585218065Sadrian 1586218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1587218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1588218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1589218065Sadrian /* 1590218065Sadrian * Packet length must not include any 1591218065Sadrian * pad bytes; deduct them here. 1592218065Sadrian */ 1593218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1594218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1595218065Sadrian 1596227364Sadrian 1597227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1598227364Sadrian __func__, ismcast); 1599227364Sadrian 1600218154Sadrian /* Handle encryption twiddling if needed */ 1601227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1602227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1603227364Sadrian &hdrlen, &pktlen, &keyix)) { 1604218154Sadrian ath_freetx(m0); 1605218154Sadrian return EIO; 1606218154Sadrian } 1607218154Sadrian /* packet header may have moved, reset our local pointer */ 1608218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1609218065Sadrian 1610227364Sadrian /* Do the generic frame setup */ 1611227364Sadrian /* XXX should just bzero the bf_state? */ 1612227364Sadrian bf->bf_state.bfs_dobaw = 0; 1613227364Sadrian 1614218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1615218065Sadrian if (error != 0) 1616218065Sadrian return error; 1617218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1618218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1619218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1620218065Sadrian 1621218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1622218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1623218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1624218065Sadrian flags |= HAL_TXDESC_RTSENA; 1625227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1626227364Sadrian /* XXX assume 11g/11n protection? */ 1627227364Sadrian bf->bf_state.bfs_doprot = 1; 1628218065Sadrian flags |= HAL_TXDESC_CTSENA; 1629227364Sadrian } 1630218065Sadrian /* XXX leave ismcast to injector? */ 1631218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1632218065Sadrian flags |= HAL_TXDESC_NOACK; 1633218065Sadrian 1634218065Sadrian rt = sc->sc_currates; 1635218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1636218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1637218065Sadrian txrate = rt->info[rix].rateCode; 1638218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1639218065Sadrian txrate |= rt->info[rix].shortPreamble; 1640218065Sadrian sc->sc_txrix = rix; 1641218065Sadrian try0 = params->ibp_try0; 1642218065Sadrian ismrr = (params->ibp_try1 != 0); 1643218065Sadrian txantenna = params->ibp_pri >> 2; 1644218065Sadrian if (txantenna == 0) /* XXX? */ 1645218065Sadrian txantenna = sc->sc_txantenna; 1646218157Sadrian 1647227364Sadrian /* 1648227364Sadrian * Since ctsrate is fixed, store it away for later 1649227364Sadrian * use when the descriptor fields are being set. 1650227364Sadrian */ 1651227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1652227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1653218157Sadrian 1654218065Sadrian pri = params->ibp_pri & 3; 1655227364Sadrian /* Override pri if the frame isn't a QoS one */ 1656227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1657227364Sadrian pri = ath_tx_getac(sc, m0); 1658227364Sadrian 1659218065Sadrian /* 1660218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1661218065Sadrian * set the sequence number, duration, etc. 1662218065Sadrian */ 1663218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1664218065Sadrian 1665218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1666218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1667218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1668218065Sadrian 1669218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1670218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1671218065Sadrian 1672218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1673218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1674218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1675218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1676218065Sadrian if (m0->m_flags & M_FRAG) 1677218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1678218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1679218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1680218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1681218065Sadrian 1682218065Sadrian ieee80211_radiotap_tx(vap, m0); 1683218065Sadrian } 1684218065Sadrian 1685218065Sadrian /* 1686218065Sadrian * Formulate first tx descriptor with tx controls. 1687218065Sadrian */ 1688218065Sadrian ds = bf->bf_desc; 1689218065Sadrian /* XXX check return value? */ 1690227364Sadrian 1691227364Sadrian /* Store the decided rate index values away */ 1692227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1693227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1694227364Sadrian bf->bf_state.bfs_atype = atype; 1695227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1696227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1697227364Sadrian bf->bf_state.bfs_try0 = try0; 1698227364Sadrian bf->bf_state.bfs_keyix = keyix; 1699227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1700227364Sadrian bf->bf_state.bfs_flags = flags; 1701218065Sadrian bf->bf_txflags = flags; 1702227364Sadrian bf->bf_state.bfs_shpream = 1703227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1704218065Sadrian 1705227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1706227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1707227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1708227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1709218240Sadrian 1710227364Sadrian /* Blank the legacy rate array */ 1711227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1712218240Sadrian 1713227364Sadrian bf->bf_state.bfs_rc[0].rix = 1714227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1715227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1716227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1717227364Sadrian 1718227364Sadrian if (ismrr) { 1719227364Sadrian int rix; 1720227364Sadrian 1721227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1722227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1723227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1724227364Sadrian 1725227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1726227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1727227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1728227364Sadrian 1729227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1730227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1731227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1732218065Sadrian } 1733227364Sadrian /* 1734227364Sadrian * All the required rate control decisions have been made; 1735227364Sadrian * fill in the rc flags. 1736227364Sadrian */ 1737227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1738218065Sadrian 1739227364Sadrian /* NB: no buffered multicast in power save support */ 1740227364Sadrian 1741227364Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1742227364Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1743227364Sadrian 1744227364Sadrian /* Map ADDBA to the correct priority */ 1745227364Sadrian if (do_override) { 1746227364Sadrian#if 0 1747227364Sadrian device_printf(sc->sc_dev, 1748227364Sadrian "%s: overriding tid %d pri %d -> %d\n", 1749227364Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1750227364Sadrian#endif 1751227364Sadrian pri = TID_TO_WME_AC(o_tid); 1752218240Sadrian } 1753218240Sadrian 1754227364Sadrian /* 1755227364Sadrian * If we're overiding the ADDBA destination, dump directly 1756227364Sadrian * into the hardware queue, right after any pending 1757227364Sadrian * frames to that node are. 1758227364Sadrian */ 1759227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1760227364Sadrian __func__, do_override); 1761227364Sadrian 1762227364Sadrian if (do_override) { 1763227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1764227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1765227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1766227364Sadrian } else { 1767227364Sadrian /* Queue to software queue */ 1768227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1769227364Sadrian } 1770227364Sadrian 1771218065Sadrian return 0; 1772218065Sadrian} 1773218065Sadrian 1774227364Sadrian/* 1775227364Sadrian * Send a raw frame. 1776227364Sadrian * 1777227364Sadrian * This can be called by net80211. 1778227364Sadrian */ 1779218065Sadrianint 1780218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1781218065Sadrian const struct ieee80211_bpf_params *params) 1782218065Sadrian{ 1783218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1784218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1785218065Sadrian struct ath_softc *sc = ifp->if_softc; 1786218065Sadrian struct ath_buf *bf; 1787232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1788232764Sadrian int error = 0; 1789218065Sadrian 1790227651Sadrian ATH_PCU_LOCK(sc); 1791227651Sadrian if (sc->sc_inreset_cnt > 0) { 1792227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 1793227651Sadrian __func__); 1794227651Sadrian error = EIO; 1795227651Sadrian ATH_PCU_UNLOCK(sc); 1796227651Sadrian goto bad0; 1797227651Sadrian } 1798227651Sadrian sc->sc_txstart_cnt++; 1799227651Sadrian ATH_PCU_UNLOCK(sc); 1800227651Sadrian 1801218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 1802218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 1803218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 1804218065Sadrian "!running" : "invalid"); 1805218065Sadrian m_freem(m); 1806218065Sadrian error = ENETDOWN; 1807218065Sadrian goto bad; 1808218065Sadrian } 1809232764Sadrian 1810218065Sadrian /* 1811232764Sadrian * Enforce how deep the multicast queue can grow. 1812232764Sadrian * 1813232764Sadrian * XXX duplicated in ath_tx_start(). 1814232764Sadrian */ 1815232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1816232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1817232764Sadrian 1818232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1819232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1820232764Sadrian error = ENOBUFS; 1821232764Sadrian } 1822232764Sadrian 1823232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1824232764Sadrian 1825232764Sadrian if (error != 0) { 1826232764Sadrian m_freem(m); 1827232764Sadrian goto bad; 1828232764Sadrian } 1829232764Sadrian } 1830232764Sadrian 1831232764Sadrian /* 1832218065Sadrian * Grab a TX buffer and associated resources. 1833218065Sadrian */ 1834218065Sadrian bf = ath_getbuf(sc); 1835218065Sadrian if (bf == NULL) { 1836218065Sadrian sc->sc_stats.ast_tx_nobuf++; 1837218065Sadrian m_freem(m); 1838218065Sadrian error = ENOBUFS; 1839218065Sadrian goto bad; 1840218065Sadrian } 1841218065Sadrian 1842218065Sadrian if (params == NULL) { 1843218065Sadrian /* 1844218065Sadrian * Legacy path; interpret frame contents to decide 1845218065Sadrian * precisely how to send the frame. 1846218065Sadrian */ 1847218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 1848218065Sadrian error = EIO; /* XXX */ 1849218065Sadrian goto bad2; 1850218065Sadrian } 1851218065Sadrian } else { 1852218065Sadrian /* 1853218065Sadrian * Caller supplied explicit parameters to use in 1854218065Sadrian * sending the frame. 1855218065Sadrian */ 1856218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 1857218065Sadrian error = EIO; /* XXX */ 1858218065Sadrian goto bad2; 1859218065Sadrian } 1860218065Sadrian } 1861218065Sadrian sc->sc_wd_timer = 5; 1862218065Sadrian ifp->if_opackets++; 1863218065Sadrian sc->sc_stats.ast_tx_raw++; 1864218065Sadrian 1865227651Sadrian ATH_PCU_LOCK(sc); 1866227651Sadrian sc->sc_txstart_cnt--; 1867227651Sadrian ATH_PCU_UNLOCK(sc); 1868227651Sadrian 1869218065Sadrian return 0; 1870218065Sadrianbad2: 1871218065Sadrian ATH_TXBUF_LOCK(sc); 1872227344Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); 1873218065Sadrian ATH_TXBUF_UNLOCK(sc); 1874218065Sadrianbad: 1875227651Sadrian ATH_PCU_LOCK(sc); 1876227651Sadrian sc->sc_txstart_cnt--; 1877227651Sadrian ATH_PCU_UNLOCK(sc); 1878227651Sadrianbad0: 1879218065Sadrian ifp->if_oerrors++; 1880218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 1881218065Sadrian ieee80211_free_node(ni); 1882227651Sadrian 1883218065Sadrian return error; 1884218065Sadrian} 1885227364Sadrian 1886227364Sadrian/* Some helper functions */ 1887227364Sadrian 1888227364Sadrian/* 1889227364Sadrian * ADDBA (and potentially others) need to be placed in the same 1890227364Sadrian * hardware queue as the TID/node it's relating to. This is so 1891227364Sadrian * it goes out after any pending non-aggregate frames to the 1892227364Sadrian * same node/TID. 1893227364Sadrian * 1894227364Sadrian * If this isn't done, the ADDBA can go out before the frames 1895227364Sadrian * queued in hardware. Even though these frames have a sequence 1896227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 1897227364Sadrian * no frames whose sequence numbers are after the ADDBA should 1898227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 1899227364Sadrian * will simply drop them as being out of the BAW. 1900227364Sadrian * 1901227364Sadrian * The frames can't be appended to the TID software queue - it'll 1902227364Sadrian * never be sent out. So these frames have to be directly 1903227364Sadrian * dispatched to the hardware, rather than queued in software. 1904227364Sadrian * So if this function returns true, the TXQ has to be 1905227364Sadrian * overridden and it has to be directly dispatched. 1906227364Sadrian * 1907227364Sadrian * It's a dirty hack, but someone's gotta do it. 1908227364Sadrian */ 1909227364Sadrian 1910227364Sadrian/* 1911227364Sadrian * XXX doesn't belong here! 1912227364Sadrian */ 1913227364Sadrianstatic int 1914227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 1915227364Sadrian{ 1916227364Sadrian /* Type: Management frame? */ 1917227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 1918227364Sadrian IEEE80211_FC0_TYPE_MGT) 1919227364Sadrian return 0; 1920227364Sadrian 1921227364Sadrian /* Subtype: Action frame? */ 1922227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 1923227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 1924227364Sadrian return 0; 1925227364Sadrian 1926227364Sadrian return 1; 1927227364Sadrian} 1928227364Sadrian 1929227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1930227364Sadrian/* 1931227364Sadrian * Return an alternate TID for ADDBA request frames. 1932227364Sadrian * 1933227364Sadrian * Yes, this likely should be done in the net80211 layer. 1934227364Sadrian */ 1935227364Sadrianstatic int 1936227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 1937227364Sadrian struct ieee80211_node *ni, 1938227364Sadrian struct mbuf *m0, int *tid) 1939227364Sadrian{ 1940227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 1941227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 1942227364Sadrian uint8_t *frm; 1943227364Sadrian uint16_t baparamset; 1944227364Sadrian 1945227364Sadrian /* Not action frame? Bail */ 1946227364Sadrian if (! ieee80211_is_action(wh)) 1947227364Sadrian return 0; 1948227364Sadrian 1949227364Sadrian /* XXX Not needed for frames we send? */ 1950227364Sadrian#if 0 1951227364Sadrian /* Correct length? */ 1952227364Sadrian if (! ieee80211_parse_action(ni, m)) 1953227364Sadrian return 0; 1954227364Sadrian#endif 1955227364Sadrian 1956227364Sadrian /* Extract out action frame */ 1957227364Sadrian frm = (u_int8_t *)&wh[1]; 1958227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 1959227364Sadrian 1960227364Sadrian /* Not ADDBA? Bail */ 1961227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 1962227364Sadrian return 0; 1963227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 1964227364Sadrian return 0; 1965227364Sadrian 1966227364Sadrian /* Extract TID, return it */ 1967227364Sadrian baparamset = le16toh(ia->rq_baparamset); 1968227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 1969227364Sadrian 1970227364Sadrian return 1; 1971227364Sadrian} 1972227364Sadrian#undef MS 1973227364Sadrian 1974227364Sadrian/* Per-node software queue operations */ 1975227364Sadrian 1976227364Sadrian/* 1977227364Sadrian * Add the current packet to the given BAW. 1978227364Sadrian * It is assumed that the current packet 1979227364Sadrian * 1980227364Sadrian * + fits inside the BAW; 1981227364Sadrian * + already has had a sequence number allocated. 1982227364Sadrian * 1983227364Sadrian * Since the BAW status may be modified by both the ath task and 1984227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 1985227364Sadrian */ 1986227364Sadrianvoid 1987227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 1988227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 1989227364Sadrian{ 1990227364Sadrian int index, cindex; 1991227364Sadrian struct ieee80211_tx_ampdu *tap; 1992227364Sadrian 1993227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 1994227364Sadrian 1995227364Sadrian if (bf->bf_state.bfs_isretried) 1996227364Sadrian return; 1997227364Sadrian 1998233227Sadrian /* 1999233227Sadrian * If this occurs we're in a lot of trouble. We should try to 2000233227Sadrian * recover from this without the session hanging? 2001233227Sadrian */ 2002233227Sadrian if (! bf->bf_state.bfs_seqno_assigned) { 2003233227Sadrian device_printf(sc->sc_dev, 2004233227Sadrian "%s: bf=%p, seqno_assigned is 0?!\n", __func__, bf); 2005233227Sadrian return; 2006233227Sadrian } 2007233227Sadrian 2008227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2009227364Sadrian 2010227364Sadrian if (bf->bf_state.bfs_addedbaw) 2011227364Sadrian device_printf(sc->sc_dev, 2012233227Sadrian "%s: re-added? bf=%p, tid=%d, seqno %d; window %d:%d; " 2013229949Sadrian "baw head=%d tail=%d\n", 2014233227Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2015229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2016229949Sadrian tid->baw_tail); 2017227364Sadrian 2018227364Sadrian /* 2019233227Sadrian * Verify that the given sequence number is not outside of the 2020233227Sadrian * BAW. Complain loudly if that's the case. 2021233227Sadrian */ 2022233227Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2023233227Sadrian SEQNO(bf->bf_state.bfs_seqno))) { 2024233227Sadrian device_printf(sc->sc_dev, 2025233227Sadrian "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; " 2026233227Sadrian "baw head=%d tail=%d\n", 2027233227Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2028233227Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2029233227Sadrian tid->baw_tail); 2030233227Sadrian 2031233227Sadrian } 2032233227Sadrian 2033233227Sadrian /* 2034227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2035227364Sadrian * the txa state contains the current baw start. 2036227364Sadrian */ 2037227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2038227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2039227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2040233227Sadrian "%s: bf=%p, tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2041229949Sadrian "baw head=%d tail=%d\n", 2042233227Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2043229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2044229949Sadrian tid->baw_tail); 2045227364Sadrian 2046227364Sadrian 2047227364Sadrian#if 0 2048227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2049227364Sadrian#endif 2050227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2051227364Sadrian device_printf(sc->sc_dev, 2052227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2053227364Sadrian "head=%d, tail=%d)\n", 2054227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2055227364Sadrian device_printf(sc->sc_dev, 2056227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2057227364Sadrian __func__, 2058227364Sadrian tid->tx_buf[cindex], 2059227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2060227364Sadrian bf, 2061227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2062227364Sadrian ); 2063227364Sadrian } 2064227364Sadrian tid->tx_buf[cindex] = bf; 2065227364Sadrian 2066229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2067229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2068227364Sadrian tid->baw_tail = cindex; 2069227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2070227364Sadrian } 2071227364Sadrian} 2072227364Sadrian 2073227364Sadrian/* 2074227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2075227398Sadrian * 2076227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2077227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2078227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2079227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2080227398Sadrian * tracking array to maintain consistency. 2081227398Sadrian */ 2082227398Sadrianstatic void 2083227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2084227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2085227398Sadrian{ 2086227398Sadrian int index, cindex; 2087227398Sadrian struct ieee80211_tx_ampdu *tap; 2088227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2089227398Sadrian 2090227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2091227398Sadrian 2092227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2093227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2094227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2095227398Sadrian 2096227398Sadrian /* 2097227398Sadrian * Just warn for now; if it happens then we should find out 2098227398Sadrian * about it. It's highly likely the aggregation session will 2099227398Sadrian * soon hang. 2100227398Sadrian */ 2101227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2102227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2103227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2104227398Sadrian __func__); 2105227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2106227398Sadrian __func__, 2107227398Sadrian old_bf->bf_state.bfs_seqno, 2108227398Sadrian new_bf->bf_state.bfs_seqno); 2109227398Sadrian } 2110227398Sadrian 2111227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2112227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2113227398Sadrian " has m BA session may hang.\n", 2114227398Sadrian __func__); 2115227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2116227398Sadrian __func__, 2117227398Sadrian old_bf, new_bf); 2118227398Sadrian } 2119227398Sadrian 2120227398Sadrian tid->tx_buf[cindex] = new_bf; 2121227398Sadrian} 2122227398Sadrian 2123227398Sadrian/* 2124227364Sadrian * seq_start - left edge of BAW 2125227364Sadrian * seq_next - current/next sequence number to allocate 2126227364Sadrian * 2127227364Sadrian * Since the BAW status may be modified by both the ath task and 2128227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2129227364Sadrian */ 2130227364Sadrianstatic void 2131227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2132227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2133227364Sadrian{ 2134227364Sadrian int index, cindex; 2135227364Sadrian struct ieee80211_tx_ampdu *tap; 2136227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2137227364Sadrian 2138227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2139227364Sadrian 2140227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2141227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2142227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2143227364Sadrian 2144227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2145233227Sadrian "%s: bf=%p: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2146229949Sadrian "baw head=%d, tail=%d\n", 2147233227Sadrian __func__, bf, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2148227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2149227364Sadrian 2150227364Sadrian /* 2151227364Sadrian * If this occurs then we have a big problem - something else 2152227364Sadrian * has slid tap->txa_start along without updating the BAW 2153227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2154227364Sadrian * completely busted. 2155227364Sadrian * 2156227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2157227364Sadrian * it's quite possible that a cloned buffer is making its way 2158227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2159227364Sadrian */ 2160227364Sadrian if (tid->tx_buf[cindex] != bf) { 2161227364Sadrian device_printf(sc->sc_dev, 2162227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2163227364Sadrian __func__, 2164227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2165227364Sadrian tid->tx_buf[cindex], 2166227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2167227364Sadrian } 2168227364Sadrian 2169227364Sadrian tid->tx_buf[cindex] = NULL; 2170227364Sadrian 2171229949Sadrian while (tid->baw_head != tid->baw_tail && 2172229949Sadrian !tid->tx_buf[tid->baw_head]) { 2173227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2174227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2175227364Sadrian } 2176229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2177229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2178227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2179227364Sadrian} 2180227364Sadrian 2181227364Sadrian/* 2182227364Sadrian * Mark the current node/TID as ready to TX. 2183227364Sadrian * 2184227364Sadrian * This is done to make it easy for the software scheduler to 2185227364Sadrian * find which nodes have data to send. 2186227364Sadrian * 2187227364Sadrian * The TXQ lock must be held. 2188227364Sadrian */ 2189227364Sadrianstatic void 2190227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2191227364Sadrian{ 2192227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2193227364Sadrian 2194227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2195227364Sadrian 2196227364Sadrian if (tid->paused) 2197227364Sadrian return; /* paused, can't schedule yet */ 2198227364Sadrian 2199227364Sadrian if (tid->sched) 2200227364Sadrian return; /* already scheduled */ 2201227364Sadrian 2202227364Sadrian tid->sched = 1; 2203227364Sadrian 2204227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2205227364Sadrian} 2206227364Sadrian 2207227364Sadrian/* 2208227364Sadrian * Mark the current node as no longer needing to be polled for 2209227364Sadrian * TX packets. 2210227364Sadrian * 2211227364Sadrian * The TXQ lock must be held. 2212227364Sadrian */ 2213227364Sadrianstatic void 2214227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2215227364Sadrian{ 2216227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2217227364Sadrian 2218227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2219227364Sadrian 2220227364Sadrian if (tid->sched == 0) 2221227364Sadrian return; 2222227364Sadrian 2223227364Sadrian tid->sched = 0; 2224227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2225227364Sadrian} 2226227364Sadrian 2227227364Sadrian/* 2228233227Sadrian * Return whether a sequence number is actually required. 2229233227Sadrian * 2230233227Sadrian * A sequence number must only be allocated at the time that a frame 2231233227Sadrian * is considered for addition to the BAW/aggregate and being TXed. 2232233227Sadrian * The sequence number must not be allocated before the frame 2233233227Sadrian * is added to the BAW (protected by the same lock instance) 2234233227Sadrian * otherwise a the multi-entrant TX path may result in a later seqno 2235233227Sadrian * being added to the BAW first. The subsequent addition of the 2236233227Sadrian * earlier seqno would then not go into the BAW as it's now outside 2237233227Sadrian * of said BAW. 2238233227Sadrian * 2239233227Sadrian * This routine is used by ath_tx_start() to mark whether the frame 2240233227Sadrian * should get a sequence number before adding it to the BAW. 2241233227Sadrian * 2242233227Sadrian * Then the actual aggregate TX routines will check whether this 2243233227Sadrian * flag is set and if the frame needs to go into the BAW, it'll 2244233227Sadrian * have a sequence number allocated for it. 2245233227Sadrian */ 2246233227Sadrianstatic int 2247233227Sadrianath_tx_seqno_required(struct ath_softc *sc, struct ieee80211_node *ni, 2248233227Sadrian struct ath_buf *bf, struct mbuf *m0) 2249233227Sadrian{ 2250233227Sadrian const struct ieee80211_frame *wh; 2251233227Sadrian uint8_t subtype; 2252233227Sadrian 2253233227Sadrian wh = mtod(m0, const struct ieee80211_frame *); 2254233227Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2255233227Sadrian 2256233227Sadrian /* XXX assert txq lock */ 2257233227Sadrian /* XXX assert ampdu is set */ 2258233227Sadrian 2259233227Sadrian return ((IEEE80211_QOS_HAS_SEQ(wh) && 2260233227Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL)); 2261233227Sadrian} 2262233227Sadrian 2263233227Sadrian/* 2264227364Sadrian * Assign a sequence number manually to the given frame. 2265227364Sadrian * 2266227364Sadrian * This should only be called for A-MPDU TX frames. 2267233227Sadrian * 2268233227Sadrian * If this is called after the initial frame setup, make sure you've flushed 2269233227Sadrian * the DMA map or you'll risk sending stale data to the NIC. This routine 2270233227Sadrian * updates the actual frame contents with the relevant seqno. 2271227364Sadrian */ 2272233227Sadrianint 2273227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2274227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2275227364Sadrian{ 2276227364Sadrian struct ieee80211_frame *wh; 2277227364Sadrian int tid, pri; 2278227364Sadrian ieee80211_seq seqno; 2279227364Sadrian uint8_t subtype; 2280227364Sadrian 2281227364Sadrian /* TID lookup */ 2282227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2283227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2284227364Sadrian tid = WME_AC_TO_TID(pri); 2285233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2286233227Sadrian "%s: bf=%p, pri=%d, tid=%d, qos has seq=%d\n", 2287233227Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2288227364Sadrian 2289233227Sadrian if (! bf->bf_state.bfs_need_seqno) { 2290233227Sadrian device_printf(sc->sc_dev, "%s: bf=%p: need_seqno not set?!\n", 2291233227Sadrian __func__, bf); 2292233227Sadrian return -1; 2293233227Sadrian } 2294233227Sadrian /* XXX check for bfs_need_seqno? */ 2295233227Sadrian if (bf->bf_state.bfs_seqno_assigned) { 2296233227Sadrian device_printf(sc->sc_dev, 2297233227Sadrian "%s: bf=%p: seqno already assigned (%d)?!\n", 2298233227Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno)); 2299233227Sadrian return bf->bf_state.bfs_seqno >> IEEE80211_SEQ_SEQ_SHIFT; 2300233227Sadrian } 2301233227Sadrian 2302227364Sadrian /* XXX Is it a control frame? Ignore */ 2303227364Sadrian 2304227364Sadrian /* Does the packet require a sequence number? */ 2305227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2306227364Sadrian return -1; 2307227364Sadrian 2308227364Sadrian /* 2309227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2310227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2311227364Sadrian * 2312227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2313227364Sadrian * data frame sequence number in the aggregation state updates, so 2314227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2315227364Sadrian * RX side. 2316227364Sadrian */ 2317227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2318227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2319227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2320227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2321227364Sadrian } else { 2322227364Sadrian /* Manually assign sequence number */ 2323227364Sadrian seqno = ni->ni_txseqs[tid]; 2324227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2325227364Sadrian } 2326227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2327227364Sadrian M_SEQNO_SET(m0, seqno); 2328233227Sadrian bf->bf_state.bfs_seqno = seqno << IEEE80211_SEQ_SEQ_SHIFT; 2329233227Sadrian bf->bf_state.bfs_seqno_assigned = 1; 2330227364Sadrian 2331227364Sadrian /* Return so caller can do something with it if needed */ 2332233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: -> seqno=%d\n", 2333233227Sadrian __func__, 2334233227Sadrian bf, 2335233227Sadrian seqno); 2336227364Sadrian return seqno; 2337227364Sadrian} 2338227364Sadrian 2339227364Sadrian/* 2340227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2341227364Sadrian * If the frame is out of BAW, queue. 2342227364Sadrian * Otherwise, schedule it as a single frame. 2343227364Sadrian */ 2344227364Sadrianstatic void 2345227364Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, struct ath_buf *bf) 2346227364Sadrian{ 2347233227Sadrian struct ieee80211_node *ni = &an->an_node; 2348227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2349227364Sadrian struct ath_txq *txq = bf->bf_state.bfs_txq; 2350227364Sadrian struct ieee80211_tx_ampdu *tap; 2351227364Sadrian 2352227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2353227364Sadrian 2354227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2355227364Sadrian 2356227364Sadrian /* paused? queue */ 2357227364Sadrian if (tid->paused) { 2358227364Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2359233480Sadrian /* XXX don't sched - we're paused! */ 2360227364Sadrian return; 2361227364Sadrian } 2362227364Sadrian 2363233227Sadrian /* 2364233227Sadrian * TODO: If it's _before_ the BAW left edge, complain very loudly. 2365233227Sadrian * This means something (else) has slid the left edge along 2366233227Sadrian * before we got a chance to be TXed. 2367233227Sadrian */ 2368233227Sadrian 2369233227Sadrian /* 2370233227Sadrian * Is there space in this BAW for another frame? 2371233227Sadrian * If not, don't bother trying to schedule it; just 2372233227Sadrian * throw it back on the queue. 2373233227Sadrian * 2374233227Sadrian * If we allocate the sequence number before we add 2375233227Sadrian * it to the BAW, we risk racing with another TX 2376233227Sadrian * thread that gets in a frame into the BAW with 2377233227Sadrian * seqno greater than ours. We'd then fail the 2378233227Sadrian * below check and throw the frame on the tail of 2379233227Sadrian * the queue. The sender would then have a hole. 2380233227Sadrian * 2381233227Sadrian * XXX again, we're protecting ni->ni_txseqs[tid] 2382233227Sadrian * behind this hardware TXQ lock, like the rest of 2383233227Sadrian * the TIDs that map to it. Ugh. 2384233227Sadrian */ 2385233227Sadrian if (bf->bf_state.bfs_dobaw) { 2386233514Sadrian ieee80211_seq seqno; 2387233514Sadrian 2388233514Sadrian /* 2389233514Sadrian * If the sequence number is allocated, use it. 2390233514Sadrian * Otherwise, use the sequence number we WOULD 2391233514Sadrian * allocate. 2392233514Sadrian */ 2393233514Sadrian if (bf->bf_state.bfs_seqno_assigned) 2394233514Sadrian seqno = SEQNO(bf->bf_state.bfs_seqno); 2395233514Sadrian else 2396233514Sadrian seqno = ni->ni_txseqs[bf->bf_state.bfs_tid]; 2397233514Sadrian 2398233514Sadrian /* 2399233514Sadrian * Check whether either the currently allocated 2400233514Sadrian * sequence number _OR_ the to-be allocated 2401233514Sadrian * sequence number is inside the BAW. 2402233514Sadrian */ 2403233514Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, seqno)) { 2404233227Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2405233227Sadrian ath_tx_tid_sched(sc, tid); 2406233227Sadrian return; 2407233227Sadrian } 2408233227Sadrian if (! bf->bf_state.bfs_seqno_assigned) { 2409233514Sadrian int seqno; 2410233514Sadrian 2411233227Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, bf->bf_m); 2412233227Sadrian if (seqno < 0) { 2413233227Sadrian device_printf(sc->sc_dev, 2414233227Sadrian "%s: bf=%p, huh, seqno=-1?\n", 2415233227Sadrian __func__, 2416233227Sadrian bf); 2417233227Sadrian /* XXX what can we even do here? */ 2418233227Sadrian } 2419233227Sadrian /* Flush seqno update to RAM */ 2420233227Sadrian /* 2421233227Sadrian * XXX This is required because the dmasetup 2422233227Sadrian * XXX is done early rather than at dispatch 2423233227Sadrian * XXX time. Ew, we should fix this! 2424233227Sadrian */ 2425233227Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 2426233227Sadrian BUS_DMASYNC_PREWRITE); 2427233227Sadrian } 2428233227Sadrian } 2429233227Sadrian 2430227364Sadrian /* outside baw? queue */ 2431227364Sadrian if (bf->bf_state.bfs_dobaw && 2432227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2433227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2434233227Sadrian device_printf(sc->sc_dev, 2435233227Sadrian "%s: bf=%p, shouldn't be outside BAW now?!\n", 2436233227Sadrian __func__, 2437233227Sadrian bf); 2438227364Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2439227364Sadrian ath_tx_tid_sched(sc, tid); 2440227364Sadrian return; 2441227364Sadrian } 2442227364Sadrian 2443227364Sadrian /* Direct dispatch to hardware */ 2444227364Sadrian ath_tx_do_ratelookup(sc, bf); 2445227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2446227364Sadrian ath_tx_set_rtscts(sc, bf); 2447227364Sadrian ath_tx_setds(sc, bf); 2448227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 2449227364Sadrian ath_tx_chaindesclist(sc, bf); 2450227364Sadrian 2451227364Sadrian /* Statistics */ 2452227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2453227364Sadrian 2454227364Sadrian /* Track per-TID hardware queue depth correctly */ 2455227364Sadrian tid->hwq_depth++; 2456227364Sadrian 2457227364Sadrian /* Add to BAW */ 2458227364Sadrian if (bf->bf_state.bfs_dobaw) { 2459227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2460227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2461227364Sadrian } 2462227364Sadrian 2463227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2464227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2465227364Sadrian 2466227364Sadrian /* Hand off to hardware */ 2467227364Sadrian ath_tx_handoff(sc, txq, bf); 2468227364Sadrian} 2469227364Sadrian 2470227364Sadrian/* 2471227364Sadrian * Attempt to send the packet. 2472227364Sadrian * If the queue isn't busy, direct-dispatch. 2473227364Sadrian * If the queue is busy enough, queue the given packet on the 2474227364Sadrian * relevant software queue. 2475227364Sadrian */ 2476227364Sadrianvoid 2477227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2478227364Sadrian struct ath_buf *bf) 2479227364Sadrian{ 2480227364Sadrian struct ath_node *an = ATH_NODE(ni); 2481227364Sadrian struct ieee80211_frame *wh; 2482227364Sadrian struct ath_tid *atid; 2483227364Sadrian int pri, tid; 2484227364Sadrian struct mbuf *m0 = bf->bf_m; 2485227364Sadrian 2486227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2487227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2488227364Sadrian pri = ath_tx_getac(sc, m0); 2489227364Sadrian tid = ath_tx_gettid(sc, m0); 2490227364Sadrian atid = &an->an_tid[tid]; 2491227364Sadrian 2492233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d, seqno=%d\n", 2493233227Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh), SEQNO(bf->bf_state.bfs_seqno)); 2494227364Sadrian 2495227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2496227364Sadrian bf->bf_state.bfs_tid = tid; 2497227364Sadrian bf->bf_state.bfs_txq = txq; 2498227364Sadrian bf->bf_state.bfs_pri = pri; 2499227364Sadrian 2500227364Sadrian /* 2501227364Sadrian * If the hardware queue isn't busy, queue it directly. 2502227364Sadrian * If the hardware queue is busy, queue it. 2503227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2504227364Sadrian * queue it. 2505227364Sadrian */ 2506227364Sadrian ATH_TXQ_LOCK(txq); 2507227364Sadrian if (atid->paused) { 2508227364Sadrian /* TID is paused, queue */ 2509233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: paused\n", __func__, bf); 2510227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2511227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2512227364Sadrian /* AMPDU pending; queue */ 2513233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: pending\n", __func__, bf); 2514227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2515227364Sadrian /* XXX sched? */ 2516227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2517227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2518229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2519233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2520233227Sadrian "%s: bf=%p: xmit_aggr\n", 2521233227Sadrian __func__, bf); 2522227364Sadrian ath_tx_xmit_aggr(sc, an, bf); 2523229949Sadrian } else { 2524229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2525233227Sadrian "%s: bf=%p: ampdu; swq'ing\n", 2526233227Sadrian __func__, bf); 2527227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2528227364Sadrian ath_tx_tid_sched(sc, atid); 2529227364Sadrian } 2530227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2531227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2532233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: xmit_normal\n", __func__, bf); 2533227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2534227364Sadrian } else { 2535227364Sadrian /* Busy; queue */ 2536233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: swq'ing\n", __func__, bf); 2537227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2538227364Sadrian ath_tx_tid_sched(sc, atid); 2539227364Sadrian } 2540227364Sadrian ATH_TXQ_UNLOCK(txq); 2541227364Sadrian} 2542227364Sadrian 2543227364Sadrian/* 2544227364Sadrian * Do the basic frame setup stuff that's required before the frame 2545227364Sadrian * is added to a software queue. 2546227364Sadrian * 2547227364Sadrian * All frames get mostly the same treatment and it's done once. 2548227364Sadrian * Retransmits fiddle with things like the rate control setup, 2549227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2550227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2551227364Sadrian * 2552227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2553227364Sadrian * m0 may not be valid. 2554227364Sadrian */ 2555227364Sadrian 2556227364Sadrian 2557227364Sadrian/* 2558227364Sadrian * Configure the per-TID node state. 2559227364Sadrian * 2560227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2561227364Sadrian * else to put it just yet. 2562227364Sadrian * 2563227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2564227364Sadrian */ 2565227364Sadrianvoid 2566227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2567227364Sadrian{ 2568227364Sadrian int i, j; 2569227364Sadrian struct ath_tid *atid; 2570227364Sadrian 2571227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2572227364Sadrian atid = &an->an_tid[i]; 2573227364Sadrian TAILQ_INIT(&atid->axq_q); 2574227364Sadrian atid->tid = i; 2575227364Sadrian atid->an = an; 2576227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2577227364Sadrian atid->tx_buf[j] = NULL; 2578227364Sadrian atid->baw_head = atid->baw_tail = 0; 2579227364Sadrian atid->paused = 0; 2580227364Sadrian atid->sched = 0; 2581227364Sadrian atid->hwq_depth = 0; 2582227364Sadrian atid->cleanup_inprogress = 0; 2583227364Sadrian if (i == IEEE80211_NONQOS_TID) 2584227364Sadrian atid->ac = WME_AC_BE; 2585227364Sadrian else 2586227364Sadrian atid->ac = TID_TO_WME_AC(i); 2587227364Sadrian } 2588227364Sadrian} 2589227364Sadrian 2590227364Sadrian/* 2591227364Sadrian * Pause the current TID. This stops packets from being transmitted 2592227364Sadrian * on it. 2593227364Sadrian * 2594227364Sadrian * Since this is also called from upper layers as well as the driver, 2595227364Sadrian * it will get the TID lock. 2596227364Sadrian */ 2597227364Sadrianstatic void 2598227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2599227364Sadrian{ 2600227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2601227364Sadrian tid->paused++; 2602227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2603227364Sadrian __func__, tid->paused); 2604227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2605227364Sadrian} 2606227364Sadrian 2607227364Sadrian/* 2608227364Sadrian * Unpause the current TID, and schedule it if needed. 2609227364Sadrian */ 2610227364Sadrianstatic void 2611227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2612227364Sadrian{ 2613227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2614227364Sadrian 2615227364Sadrian tid->paused--; 2616227364Sadrian 2617227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2618227364Sadrian __func__, tid->paused); 2619227364Sadrian 2620227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2621227364Sadrian return; 2622227364Sadrian } 2623227364Sadrian 2624227364Sadrian ath_tx_tid_sched(sc, tid); 2625227364Sadrian /* Punt some frames to the hardware if needed */ 2626227364Sadrian ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2627227364Sadrian} 2628227364Sadrian 2629227364Sadrian/* 2630227364Sadrian * Free any packets currently pending in the software TX queue. 2631227364Sadrian * 2632227364Sadrian * This will be called when a node is being deleted. 2633227364Sadrian * 2634227364Sadrian * It can also be called on an active node during an interface 2635227364Sadrian * reset or state transition. 2636227364Sadrian * 2637227364Sadrian * (From Linux/reference): 2638227364Sadrian * 2639227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2640227364Sadrian * sequence number(s) without setting the retry bit. The 2641227364Sadrian * alternative is to give up on these and BAR the receiver's window 2642227364Sadrian * forward. 2643227364Sadrian */ 2644227364Sadrianstatic void 2645229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 2646229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 2647227364Sadrian{ 2648227364Sadrian struct ath_buf *bf; 2649227364Sadrian struct ieee80211_tx_ampdu *tap; 2650227364Sadrian struct ieee80211_node *ni = &an->an_node; 2651227364Sadrian int t = 0; 2652227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2653227364Sadrian 2654227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2655227364Sadrian 2656227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2657227364Sadrian 2658227364Sadrian /* Walk the queue, free frames */ 2659227364Sadrian for (;;) { 2660227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2661227364Sadrian if (bf == NULL) { 2662227364Sadrian break; 2663227364Sadrian } 2664227364Sadrian 2665227364Sadrian if (t == 0) { 2666227364Sadrian device_printf(sc->sc_dev, 2667233330Sadrian "%s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 2668233480Sadrian "seqno_assign=%d, seqno_required=%d, seqno=%d, retry=%d\n", 2669233330Sadrian __func__, ni, bf, 2670233330Sadrian bf->bf_state.bfs_addedbaw, 2671233330Sadrian bf->bf_state.bfs_dobaw, 2672233330Sadrian bf->bf_state.bfs_need_seqno, 2673233330Sadrian bf->bf_state.bfs_seqno_assigned, 2674233480Sadrian SEQNO(bf->bf_state.bfs_seqno), 2675233480Sadrian bf->bf_state.bfs_retries); 2676233330Sadrian device_printf(sc->sc_dev, 2677233480Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d\n", 2678233480Sadrian __func__, ni, bf, 2679233480Sadrian tid->axq_depth, 2680233480Sadrian tid->hwq_depth); 2681233480Sadrian device_printf(sc->sc_dev, 2682233227Sadrian "%s: node %p: bf=%p: tid %d: txq_depth=%d, " 2683227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2684229949Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, " 2685229949Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 2686233227Sadrian __func__, ni, bf, tid->tid, txq->axq_depth, 2687227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2688227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2689227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2690227364Sadrian ni->ni_txseqs[tid->tid]); 2691229165Sadrian 2692229165Sadrian /* XXX Dump the frame, see what it is? */ 2693229165Sadrian ieee80211_dump_pkt(ni->ni_ic, 2694229165Sadrian mtod(bf->bf_m, const uint8_t *), 2695229165Sadrian bf->bf_m->m_len, 0, -1); 2696229165Sadrian 2697233227Sadrian //t = 1; 2698227364Sadrian } 2699227364Sadrian 2700227364Sadrian 2701227364Sadrian /* 2702227364Sadrian * If the current TID is running AMPDU, update 2703227364Sadrian * the BAW. 2704227364Sadrian */ 2705227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 2706227364Sadrian bf->bf_state.bfs_dobaw) { 2707227364Sadrian /* 2708227364Sadrian * Only remove the frame from the BAW if it's 2709227364Sadrian * been transmitted at least once; this means 2710227364Sadrian * the frame was in the BAW to begin with. 2711227364Sadrian */ 2712227364Sadrian if (bf->bf_state.bfs_retries > 0) { 2713227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 2714227364Sadrian bf->bf_state.bfs_dobaw = 0; 2715227364Sadrian } 2716227364Sadrian /* 2717227364Sadrian * This has become a non-fatal error now 2718227364Sadrian */ 2719227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2720227364Sadrian device_printf(sc->sc_dev, 2721227364Sadrian "%s: wasn't added: seqno %d\n", 2722227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2723227364Sadrian } 2724227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 2725227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 2726227364Sadrian } 2727227364Sadrian 2728227364Sadrian /* 2729227364Sadrian * Now that it's completed, grab the TID lock and update 2730227364Sadrian * the sequence number and BAW window. 2731227364Sadrian * Because sequence numbers have been assigned to frames 2732227364Sadrian * that haven't been sent yet, it's entirely possible 2733227364Sadrian * we'll be called with some pending frames that have not 2734227364Sadrian * been transmitted. 2735227364Sadrian * 2736227364Sadrian * The cleaner solution is to do the sequence number allocation 2737227364Sadrian * when the packet is first transmitted - and thus the "retries" 2738227364Sadrian * check above would be enough to update the BAW/seqno. 2739227364Sadrian */ 2740227364Sadrian 2741227364Sadrian /* But don't do it for non-QoS TIDs */ 2742227364Sadrian if (tap) { 2743227364Sadrian#if 0 2744227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2745227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 2746227364Sadrian __func__, an, tid->tid, tap->txa_start); 2747227364Sadrian#endif 2748227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 2749227364Sadrian tid->baw_tail = tid->baw_head; 2750227364Sadrian } 2751227364Sadrian} 2752227364Sadrian 2753227364Sadrian/* 2754227364Sadrian * Flush all software queued packets for the given node. 2755227364Sadrian * 2756227364Sadrian * This occurs when a completion handler frees the last buffer 2757227364Sadrian * for a node, and the node is thus freed. This causes the node 2758227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 2759227364Sadrian */ 2760227364Sadrianvoid 2761227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 2762227364Sadrian{ 2763227364Sadrian int tid; 2764227364Sadrian ath_bufhead bf_cq; 2765227364Sadrian struct ath_buf *bf; 2766227364Sadrian 2767227364Sadrian TAILQ_INIT(&bf_cq); 2768227364Sadrian 2769227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 2770227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2771227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 2772227364Sadrian 2773227364Sadrian /* Remove this tid from the list of active tids */ 2774227364Sadrian ATH_TXQ_LOCK(txq); 2775227364Sadrian ath_tx_tid_unsched(sc, atid); 2776227364Sadrian 2777227364Sadrian /* Free packets */ 2778227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 2779227364Sadrian ATH_TXQ_UNLOCK(txq); 2780227364Sadrian } 2781227364Sadrian 2782227364Sadrian /* Handle completed frames */ 2783227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2784227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2785227364Sadrian ath_tx_default_comp(sc, bf, 0); 2786227364Sadrian } 2787227364Sadrian} 2788227364Sadrian 2789227364Sadrian/* 2790227364Sadrian * Drain all the software TXQs currently with traffic queued. 2791227364Sadrian */ 2792227364Sadrianvoid 2793227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 2794227364Sadrian{ 2795227364Sadrian struct ath_tid *tid; 2796227364Sadrian ath_bufhead bf_cq; 2797227364Sadrian struct ath_buf *bf; 2798227364Sadrian 2799227364Sadrian TAILQ_INIT(&bf_cq); 2800227364Sadrian ATH_TXQ_LOCK(txq); 2801227364Sadrian 2802227364Sadrian /* 2803227364Sadrian * Iterate over all active tids for the given txq, 2804227364Sadrian * flushing and unsched'ing them 2805227364Sadrian */ 2806227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 2807227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 2808227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 2809227364Sadrian ath_tx_tid_unsched(sc, tid); 2810227364Sadrian } 2811227364Sadrian 2812227364Sadrian ATH_TXQ_UNLOCK(txq); 2813227364Sadrian 2814227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2815227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2816227364Sadrian ath_tx_default_comp(sc, bf, 0); 2817227364Sadrian } 2818227364Sadrian} 2819227364Sadrian 2820227364Sadrian/* 2821227364Sadrian * Handle completion of non-aggregate session frames. 2822227364Sadrian */ 2823227364Sadrianvoid 2824227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 2825227364Sadrian{ 2826227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2827227364Sadrian struct ath_node *an = ATH_NODE(ni); 2828227364Sadrian int tid = bf->bf_state.bfs_tid; 2829227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2830227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 2831227364Sadrian 2832227364Sadrian /* The TID state is protected behind the TXQ lock */ 2833227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2834227364Sadrian 2835227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 2836227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 2837227364Sadrian 2838227364Sadrian atid->hwq_depth--; 2839227364Sadrian if (atid->hwq_depth < 0) 2840227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 2841227364Sadrian __func__, atid->hwq_depth); 2842227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2843227364Sadrian 2844227364Sadrian /* 2845227364Sadrian * punt to rate control if we're not being cleaned up 2846227364Sadrian * during a hw queue drain and the frame wanted an ACK. 2847227364Sadrian */ 2848227364Sadrian if (fail == 0 && ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0)) 2849227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 2850227364Sadrian ts, bf->bf_state.bfs_pktlen, 2851227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 2852227364Sadrian 2853227364Sadrian ath_tx_default_comp(sc, bf, fail); 2854227364Sadrian} 2855227364Sadrian 2856227364Sadrian/* 2857227364Sadrian * Handle cleanup of aggregate session packets that aren't 2858227364Sadrian * an A-MPDU. 2859227364Sadrian * 2860227364Sadrian * There's no need to update the BAW here - the session is being 2861227364Sadrian * torn down. 2862227364Sadrian */ 2863227364Sadrianstatic void 2864227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2865227364Sadrian{ 2866227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2867227364Sadrian struct ath_node *an = ATH_NODE(ni); 2868227364Sadrian int tid = bf->bf_state.bfs_tid; 2869227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2870227364Sadrian 2871227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 2872227364Sadrian __func__, tid, atid->incomp); 2873227364Sadrian 2874227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2875227364Sadrian atid->incomp--; 2876227364Sadrian if (atid->incomp == 0) { 2877227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2878227364Sadrian "%s: TID %d: cleaned up! resume!\n", 2879227364Sadrian __func__, tid); 2880227364Sadrian atid->cleanup_inprogress = 0; 2881227364Sadrian ath_tx_tid_resume(sc, atid); 2882227364Sadrian } 2883227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2884227364Sadrian 2885227364Sadrian ath_tx_default_comp(sc, bf, 0); 2886227364Sadrian} 2887227364Sadrian 2888227364Sadrian/* 2889227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 2890227364Sadrian * unaggregated. 2891227364Sadrian * 2892227364Sadrian * - Discard all retry frames from the s/w queue. 2893227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 2894227364Sadrian * - Count the number of unacked frames, and let transmit completion 2895227364Sadrian * handle it later. 2896227364Sadrian * 2897227364Sadrian * The caller is responsible for pausing the TID. 2898227364Sadrian */ 2899227364Sadrianstatic void 2900227364Sadrianath_tx_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 2901227364Sadrian{ 2902227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2903227364Sadrian struct ieee80211_tx_ampdu *tap; 2904227364Sadrian struct ath_buf *bf, *bf_next; 2905227364Sadrian ath_bufhead bf_cq; 2906227364Sadrian 2907227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2908227364Sadrian "%s: TID %d: called\n", __func__, tid); 2909227364Sadrian 2910227364Sadrian TAILQ_INIT(&bf_cq); 2911227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2912227364Sadrian 2913227364Sadrian /* 2914227364Sadrian * Update the frames in the software TX queue: 2915227364Sadrian * 2916227364Sadrian * + Discard retry frames in the queue 2917227364Sadrian * + Fix the completion function to be non-aggregate 2918227364Sadrian */ 2919227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2920227364Sadrian while (bf) { 2921227364Sadrian if (bf->bf_state.bfs_isretried) { 2922227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 2923227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 2924227364Sadrian atid->axq_depth--; 2925227364Sadrian if (bf->bf_state.bfs_dobaw) { 2926227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2927227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2928227364Sadrian device_printf(sc->sc_dev, 2929227364Sadrian "%s: wasn't added: seqno %d\n", 2930229949Sadrian __func__, 2931229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 2932227364Sadrian } 2933227364Sadrian bf->bf_state.bfs_dobaw = 0; 2934227364Sadrian /* 2935227364Sadrian * Call the default completion handler with "fail" just 2936227364Sadrian * so upper levels are suitably notified about this. 2937227364Sadrian */ 2938227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 2939227364Sadrian bf = bf_next; 2940227364Sadrian continue; 2941227364Sadrian } 2942227364Sadrian /* Give these the default completion handler */ 2943227364Sadrian bf->bf_comp = ath_tx_normal_comp; 2944227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 2945227364Sadrian } 2946227364Sadrian 2947227364Sadrian /* The caller is required to pause the TID */ 2948227364Sadrian#if 0 2949227364Sadrian /* Pause the TID */ 2950227364Sadrian ath_tx_tid_pause(sc, atid); 2951227364Sadrian#endif 2952227364Sadrian 2953227364Sadrian /* 2954227364Sadrian * Calculate what hardware-queued frames exist based 2955227364Sadrian * on the current BAW size. Ie, what frames have been 2956227364Sadrian * added to the TX hardware queue for this TID but 2957227364Sadrian * not yet ACKed. 2958227364Sadrian */ 2959227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 2960227364Sadrian /* Need the lock - fiddling with BAW */ 2961227364Sadrian while (atid->baw_head != atid->baw_tail) { 2962227364Sadrian if (atid->tx_buf[atid->baw_head]) { 2963227364Sadrian atid->incomp++; 2964227364Sadrian atid->cleanup_inprogress = 1; 2965227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 2966227364Sadrian } 2967227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 2968227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2969227364Sadrian } 2970227364Sadrian 2971227364Sadrian /* 2972227364Sadrian * If cleanup is required, defer TID scheduling 2973227364Sadrian * until all the HW queued packets have been 2974227364Sadrian * sent. 2975227364Sadrian */ 2976227364Sadrian if (! atid->cleanup_inprogress) 2977227364Sadrian ath_tx_tid_resume(sc, atid); 2978227364Sadrian 2979227364Sadrian if (atid->cleanup_inprogress) 2980227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2981227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 2982227364Sadrian __func__, tid, atid->incomp); 2983227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2984227364Sadrian 2985227364Sadrian /* Handle completing frames and fail them */ 2986227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2987227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2988227364Sadrian ath_tx_default_comp(sc, bf, 1); 2989227364Sadrian } 2990227364Sadrian} 2991227364Sadrian 2992227364Sadrianstatic void 2993227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 2994227364Sadrian{ 2995227364Sadrian struct ieee80211_frame *wh; 2996227364Sadrian 2997227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 2998227364Sadrian /* Only update/resync if needed */ 2999227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 3000227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 3001227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3002227364Sadrian BUS_DMASYNC_PREWRITE); 3003227364Sadrian } 3004227364Sadrian sc->sc_stats.ast_tx_swretries++; 3005227364Sadrian bf->bf_state.bfs_isretried = 1; 3006227364Sadrian bf->bf_state.bfs_retries ++; 3007227364Sadrian} 3008227364Sadrian 3009227364Sadrianstatic struct ath_buf * 3010227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3011227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3012227364Sadrian{ 3013227364Sadrian struct ath_buf *nbf; 3014227364Sadrian int error; 3015227364Sadrian 3016227364Sadrian nbf = ath_buf_clone(sc, bf); 3017227364Sadrian 3018227364Sadrian#if 0 3019227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3020227364Sadrian __func__); 3021227364Sadrian#endif 3022227364Sadrian 3023227364Sadrian if (nbf == NULL) { 3024227364Sadrian /* Failed to clone */ 3025227364Sadrian device_printf(sc->sc_dev, 3026227364Sadrian "%s: failed to clone a busy buffer\n", 3027227364Sadrian __func__); 3028227364Sadrian return NULL; 3029227364Sadrian } 3030227364Sadrian 3031227364Sadrian /* Setup the dma for the new buffer */ 3032227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3033227364Sadrian if (error != 0) { 3034227364Sadrian device_printf(sc->sc_dev, 3035227364Sadrian "%s: failed to setup dma for clone\n", 3036227364Sadrian __func__); 3037227364Sadrian /* 3038227364Sadrian * Put this at the head of the list, not tail; 3039227364Sadrian * that way it doesn't interfere with the 3040227364Sadrian * busy buffer logic (which uses the tail of 3041227364Sadrian * the list.) 3042227364Sadrian */ 3043227364Sadrian ATH_TXBUF_LOCK(sc); 3044227364Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, nbf, bf_list); 3045227364Sadrian ATH_TXBUF_UNLOCK(sc); 3046227364Sadrian return NULL; 3047227364Sadrian } 3048227364Sadrian 3049227398Sadrian /* Update BAW if required, before we free the original buf */ 3050227398Sadrian if (bf->bf_state.bfs_dobaw) 3051227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3052227398Sadrian 3053227364Sadrian /* Free current buffer; return the older buffer */ 3054227364Sadrian bf->bf_m = NULL; 3055227364Sadrian bf->bf_node = NULL; 3056227364Sadrian ath_freebuf(sc, bf); 3057227364Sadrian return nbf; 3058227364Sadrian} 3059227364Sadrian 3060227364Sadrian/* 3061227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3062227364Sadrian * session. 3063227364Sadrian * 3064227364Sadrian * If too many retries occur, pause the TID, wait for 3065227364Sadrian * any further retransmits (as there's no reason why 3066227364Sadrian * non-aggregate frames in an aggregate session are 3067227364Sadrian * transmitted in-order; they just have to be in-BAW) 3068227364Sadrian * and then queue a BAR. 3069227364Sadrian */ 3070227364Sadrianstatic void 3071227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3072227364Sadrian{ 3073227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3074227364Sadrian struct ath_node *an = ATH_NODE(ni); 3075227364Sadrian int tid = bf->bf_state.bfs_tid; 3076227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3077227364Sadrian struct ieee80211_tx_ampdu *tap; 3078227364Sadrian int txseq; 3079227364Sadrian 3080227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3081227364Sadrian 3082227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3083227364Sadrian 3084227364Sadrian /* 3085227364Sadrian * If the buffer is marked as busy, we can't directly 3086227364Sadrian * reuse it. Instead, try to clone the buffer. 3087227364Sadrian * If the clone is successful, recycle the old buffer. 3088227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3089227364Sadrian * to force the next bit of code to free the buffer 3090227364Sadrian * for us. 3091227364Sadrian */ 3092227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3093227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3094227364Sadrian struct ath_buf *nbf; 3095227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3096227364Sadrian if (nbf) 3097227364Sadrian /* bf has been freed at this point */ 3098227364Sadrian bf = nbf; 3099227364Sadrian else 3100227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3101227364Sadrian } 3102227364Sadrian 3103227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3104227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3105227364Sadrian "%s: exceeded retries; seqno %d\n", 3106227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3107227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3108227364Sadrian 3109227364Sadrian /* Update BAW anyway */ 3110227364Sadrian if (bf->bf_state.bfs_dobaw) { 3111227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3112227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3113227364Sadrian device_printf(sc->sc_dev, 3114227364Sadrian "%s: wasn't added: seqno %d\n", 3115227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3116227364Sadrian } 3117227364Sadrian bf->bf_state.bfs_dobaw = 0; 3118227364Sadrian 3119227364Sadrian /* Send BAR frame */ 3120227364Sadrian /* 3121227364Sadrian * This'll end up going into net80211 and back out 3122227364Sadrian * again, via ic->ic_raw_xmit(). 3123227364Sadrian */ 3124227364Sadrian txseq = tap->txa_start; 3125227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3126227364Sadrian 3127227364Sadrian device_printf(sc->sc_dev, 3128227364Sadrian "%s: TID %d: send BAR; seq %d\n", __func__, tid, txseq); 3129227364Sadrian 3130227364Sadrian /* XXX TODO: send BAR */ 3131227364Sadrian 3132227364Sadrian /* Free buffer, bf is free after this call */ 3133227364Sadrian ath_tx_default_comp(sc, bf, 0); 3134227364Sadrian return; 3135227364Sadrian } 3136227364Sadrian 3137227364Sadrian /* 3138227364Sadrian * This increments the retry counter as well as 3139227364Sadrian * sets the retry flag in the ath_buf and packet 3140227364Sadrian * body. 3141227364Sadrian */ 3142227364Sadrian ath_tx_set_retry(sc, bf); 3143227364Sadrian 3144227364Sadrian /* 3145227364Sadrian * Insert this at the head of the queue, so it's 3146227364Sadrian * retried before any current/subsequent frames. 3147227364Sadrian */ 3148227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3149227364Sadrian ath_tx_tid_sched(sc, atid); 3150227364Sadrian 3151227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3152227364Sadrian} 3153227364Sadrian 3154227364Sadrian/* 3155227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3156227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3157227364Sadrian * buffers. 3158227364Sadrian * 3159227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3160227364Sadrian */ 3161227364Sadrianstatic int 3162227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3163227364Sadrian ath_bufhead *bf_q) 3164227364Sadrian{ 3165227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3166227364Sadrian struct ath_node *an = ATH_NODE(ni); 3167227364Sadrian int tid = bf->bf_state.bfs_tid; 3168227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3169227364Sadrian 3170227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 3171227364Sadrian 3172227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3173227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 3174227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 3175227364Sadrian 3176227364Sadrian /* 3177227364Sadrian * If the buffer is marked as busy, we can't directly 3178227364Sadrian * reuse it. Instead, try to clone the buffer. 3179227364Sadrian * If the clone is successful, recycle the old buffer. 3180227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3181227364Sadrian * to force the next bit of code to free the buffer 3182227364Sadrian * for us. 3183227364Sadrian */ 3184227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3185227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3186227364Sadrian struct ath_buf *nbf; 3187227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3188227364Sadrian if (nbf) 3189227364Sadrian /* bf has been freed at this point */ 3190227364Sadrian bf = nbf; 3191227364Sadrian else 3192227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3193227364Sadrian } 3194227364Sadrian 3195227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3196227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3197227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3198227364Sadrian "%s: max retries: seqno %d\n", 3199227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3200227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3201227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3202227364Sadrian device_printf(sc->sc_dev, 3203227364Sadrian "%s: wasn't added: seqno %d\n", 3204227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3205227364Sadrian bf->bf_state.bfs_dobaw = 0; 3206227364Sadrian return 1; 3207227364Sadrian } 3208227364Sadrian 3209227364Sadrian ath_tx_set_retry(sc, bf); 3210227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 3211227364Sadrian 3212227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3213227364Sadrian return 0; 3214227364Sadrian} 3215227364Sadrian 3216227364Sadrian/* 3217227364Sadrian * error pkt completion for an aggregate destination 3218227364Sadrian */ 3219227364Sadrianstatic void 3220227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 3221227364Sadrian struct ath_tid *tid) 3222227364Sadrian{ 3223227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3224227364Sadrian struct ath_node *an = ATH_NODE(ni); 3225227364Sadrian struct ath_buf *bf_next, *bf; 3226227364Sadrian ath_bufhead bf_q; 3227227364Sadrian int drops = 0; 3228227364Sadrian struct ieee80211_tx_ampdu *tap; 3229227364Sadrian ath_bufhead bf_cq; 3230227364Sadrian 3231227364Sadrian TAILQ_INIT(&bf_q); 3232227364Sadrian TAILQ_INIT(&bf_cq); 3233227364Sadrian 3234227364Sadrian /* 3235227364Sadrian * Update rate control - all frames have failed. 3236227364Sadrian * 3237227364Sadrian * XXX use the length in the first frame in the series; 3238227364Sadrian * XXX just so things are consistent for now. 3239227364Sadrian */ 3240227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 3241227364Sadrian &bf_first->bf_status.ds_txstat, 3242227364Sadrian bf_first->bf_state.bfs_pktlen, 3243227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 3244227364Sadrian 3245227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3246227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3247227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 3248227364Sadrian 3249227364Sadrian /* Retry all subframes */ 3250227364Sadrian bf = bf_first; 3251227364Sadrian while (bf) { 3252227364Sadrian bf_next = bf->bf_next; 3253227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3254227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3255227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3256227364Sadrian drops++; 3257227364Sadrian bf->bf_next = NULL; 3258227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3259227364Sadrian } 3260227364Sadrian bf = bf_next; 3261227364Sadrian } 3262227364Sadrian 3263227364Sadrian /* Prepend all frames to the beginning of the queue */ 3264227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3265227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3266227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 3267227364Sadrian } 3268227364Sadrian 3269227364Sadrian ath_tx_tid_sched(sc, tid); 3270227364Sadrian 3271227364Sadrian /* 3272227364Sadrian * send bar if we dropped any frames 3273227364Sadrian * 3274227364Sadrian * Keep the txq lock held for now, as we need to ensure 3275227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 3276227364Sadrian * in the ifnet TX context or raw TX context.) 3277227364Sadrian */ 3278227364Sadrian if (drops) { 3279227364Sadrian int txseq = tap->txa_start; 3280227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3281227364Sadrian device_printf(sc->sc_dev, 3282227364Sadrian "%s: TID %d: send BAR; seq %d\n", 3283227364Sadrian __func__, tid->tid, txseq); 3284227364Sadrian 3285227364Sadrian /* XXX TODO: send BAR */ 3286227364Sadrian } else { 3287227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3288227364Sadrian } 3289227364Sadrian 3290227364Sadrian /* Complete frames which errored out */ 3291227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3292227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3293227364Sadrian ath_tx_default_comp(sc, bf, 0); 3294227364Sadrian } 3295227364Sadrian} 3296227364Sadrian 3297227364Sadrian/* 3298227364Sadrian * Handle clean-up of packets from an aggregate list. 3299227364Sadrian * 3300227364Sadrian * There's no need to update the BAW here - the session is being 3301227364Sadrian * torn down. 3302227364Sadrian */ 3303227364Sadrianstatic void 3304227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3305227364Sadrian{ 3306227364Sadrian struct ath_buf *bf, *bf_next; 3307227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3308227364Sadrian struct ath_node *an = ATH_NODE(ni); 3309227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3310227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3311227364Sadrian 3312227364Sadrian bf = bf_first; 3313227364Sadrian 3314227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3315227364Sadrian 3316227364Sadrian /* update incomp */ 3317227364Sadrian while (bf) { 3318227364Sadrian atid->incomp--; 3319227364Sadrian bf = bf->bf_next; 3320227364Sadrian } 3321227364Sadrian 3322227364Sadrian if (atid->incomp == 0) { 3323227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3324227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3325227364Sadrian __func__, tid); 3326227364Sadrian atid->cleanup_inprogress = 0; 3327227364Sadrian ath_tx_tid_resume(sc, atid); 3328227364Sadrian } 3329227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3330227364Sadrian 3331227364Sadrian /* Handle frame completion */ 3332227364Sadrian while (bf) { 3333227364Sadrian bf_next = bf->bf_next; 3334227364Sadrian ath_tx_default_comp(sc, bf, 1); 3335227364Sadrian bf = bf_next; 3336227364Sadrian } 3337227364Sadrian} 3338227364Sadrian 3339227364Sadrian/* 3340227364Sadrian * Handle completion of an set of aggregate frames. 3341227364Sadrian * 3342227364Sadrian * XXX for now, simply complete each sub-frame. 3343227364Sadrian * 3344227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3345227364Sadrian * not the last descriptor in the first frame. 3346227364Sadrian */ 3347227364Sadrianstatic void 3348229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 3349229949Sadrian int fail) 3350227364Sadrian{ 3351227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3352227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3353227364Sadrian struct ath_node *an = ATH_NODE(ni); 3354227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3355227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3356227364Sadrian struct ath_tx_status ts; 3357227364Sadrian struct ieee80211_tx_ampdu *tap; 3358227364Sadrian ath_bufhead bf_q; 3359227364Sadrian ath_bufhead bf_cq; 3360227364Sadrian int seq_st, tx_ok; 3361227364Sadrian int hasba, isaggr; 3362227364Sadrian uint32_t ba[2]; 3363227364Sadrian struct ath_buf *bf, *bf_next; 3364227364Sadrian int ba_index; 3365227364Sadrian int drops = 0; 3366227364Sadrian int nframes = 0, nbad = 0, nf; 3367227364Sadrian int pktlen; 3368227364Sadrian /* XXX there's too much on the stack? */ 3369227364Sadrian struct ath_rc_series rc[4]; 3370227364Sadrian int txseq; 3371227364Sadrian 3372227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3373227364Sadrian __func__, atid->hwq_depth); 3374227364Sadrian 3375227364Sadrian /* The TID state is kept behind the TXQ lock */ 3376227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3377227364Sadrian 3378227364Sadrian atid->hwq_depth--; 3379227364Sadrian if (atid->hwq_depth < 0) 3380227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3381227364Sadrian __func__, atid->hwq_depth); 3382227364Sadrian 3383227364Sadrian /* 3384227364Sadrian * Punt cleanup to the relevant function, not our problem now 3385227364Sadrian */ 3386227364Sadrian if (atid->cleanup_inprogress) { 3387227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3388227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3389227364Sadrian return; 3390227364Sadrian } 3391227364Sadrian 3392227364Sadrian /* 3393227364Sadrian * Take a copy; this may be needed -after- bf_first 3394227364Sadrian * has been completed and freed. 3395227364Sadrian */ 3396227364Sadrian ts = bf_first->bf_status.ds_txstat; 3397227364Sadrian /* 3398227364Sadrian * XXX for now, use the first frame in the aggregate for 3399227364Sadrian * XXX rate control completion; it's at least consistent. 3400227364Sadrian */ 3401227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3402227364Sadrian 3403227364Sadrian /* 3404227364Sadrian * handle errors first 3405227364Sadrian */ 3406227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3407227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3408227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3409227364Sadrian return; 3410227364Sadrian } 3411227364Sadrian 3412227364Sadrian TAILQ_INIT(&bf_q); 3413227364Sadrian TAILQ_INIT(&bf_cq); 3414227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3415227364Sadrian 3416227364Sadrian /* 3417227364Sadrian * extract starting sequence and block-ack bitmap 3418227364Sadrian */ 3419227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3420227364Sadrian seq_st = ts.ts_seqnum; 3421227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3422227364Sadrian tx_ok = (ts.ts_status == 0); 3423227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3424227364Sadrian ba[0] = ts.ts_ba_low; 3425227364Sadrian ba[1] = ts.ts_ba_high; 3426227364Sadrian 3427227364Sadrian /* 3428227364Sadrian * Copy the TX completion status and the rate control 3429227364Sadrian * series from the first descriptor, as it may be freed 3430227364Sadrian * before the rate control code can get its grubby fingers 3431227364Sadrian * into things. 3432227364Sadrian */ 3433227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3434227364Sadrian 3435227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3436229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 3437229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3438227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3439227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3440227364Sadrian 3441227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3442227364Sadrian if (tid != ts.ts_tid) { 3443227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3444227364Sadrian __func__, tid, ts.ts_tid); 3445227364Sadrian tx_ok = 0; 3446227364Sadrian } 3447227364Sadrian 3448227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3449227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3450227364Sadrian device_printf(sc->sc_dev, 3451229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 3452229949Sadrian "seq_st=%d\n", 3453227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3454227364Sadrian /* XXX TODO: schedule an interface reset */ 3455227364Sadrian } 3456227364Sadrian 3457227364Sadrian /* 3458227364Sadrian * Walk the list of frames, figure out which ones were correctly 3459227364Sadrian * sent and which weren't. 3460227364Sadrian */ 3461227364Sadrian bf = bf_first; 3462227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3463227364Sadrian 3464227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3465227364Sadrian bf_first = NULL; 3466227364Sadrian 3467227364Sadrian /* 3468227364Sadrian * Walk the list of completed frames and determine 3469227364Sadrian * which need to be completed and which need to be 3470227364Sadrian * retransmitted. 3471227364Sadrian * 3472227364Sadrian * For completed frames, the completion functions need 3473227364Sadrian * to be called at the end of this function as the last 3474227364Sadrian * node reference may free the node. 3475227364Sadrian * 3476227364Sadrian * Finally, since the TXQ lock can't be held during the 3477227364Sadrian * completion callback (to avoid lock recursion), 3478227364Sadrian * the completion calls have to be done outside of the 3479227364Sadrian * lock. 3480227364Sadrian */ 3481227364Sadrian while (bf) { 3482227364Sadrian nframes++; 3483229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 3484229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3485227364Sadrian bf_next = bf->bf_next; 3486227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3487227364Sadrian 3488227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3489227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3490227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3491227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3492227364Sadrian 3493227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3494227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 3495227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3496227364Sadrian bf->bf_state.bfs_dobaw = 0; 3497227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3498227364Sadrian device_printf(sc->sc_dev, 3499227364Sadrian "%s: wasn't added: seqno %d\n", 3500227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3501227364Sadrian bf->bf_next = NULL; 3502227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3503227364Sadrian } else { 3504227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3505227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3506227364Sadrian drops++; 3507227364Sadrian bf->bf_next = NULL; 3508227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3509227364Sadrian } 3510227364Sadrian nbad++; 3511227364Sadrian } 3512227364Sadrian bf = bf_next; 3513227364Sadrian } 3514227364Sadrian 3515227364Sadrian /* 3516227364Sadrian * Now that the BAW updates have been done, unlock 3517227364Sadrian * 3518227364Sadrian * txseq is grabbed before the lock is released so we 3519227364Sadrian * have a consistent view of what -was- in the BAW. 3520227364Sadrian * Anything after this point will not yet have been 3521227364Sadrian * TXed. 3522227364Sadrian */ 3523227364Sadrian txseq = tap->txa_start; 3524227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3525227364Sadrian 3526227364Sadrian if (nframes != nf) 3527227364Sadrian device_printf(sc->sc_dev, 3528227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3529227364Sadrian __func__, nframes, nf); 3530227364Sadrian 3531227364Sadrian /* 3532227364Sadrian * Now we know how many frames were bad, call the rate 3533227364Sadrian * control code. 3534227364Sadrian */ 3535227364Sadrian if (fail == 0) 3536229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 3537229949Sadrian nbad); 3538227364Sadrian 3539227364Sadrian /* 3540227364Sadrian * send bar if we dropped any frames 3541227364Sadrian */ 3542227364Sadrian if (drops) { 3543227364Sadrian device_printf(sc->sc_dev, 3544227364Sadrian "%s: TID %d: send BAR; seq %d\n", __func__, tid, txseq); 3545227364Sadrian /* XXX TODO: send BAR */ 3546227364Sadrian } 3547227364Sadrian 3548227364Sadrian /* Prepend all frames to the beginning of the queue */ 3549227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3550227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3551227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3552227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3553227364Sadrian } 3554227364Sadrian ath_tx_tid_sched(sc, atid); 3555227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3556227364Sadrian 3557227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3558227364Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3559227364Sadrian 3560227364Sadrian /* Do deferred completion */ 3561227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3562227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3563227364Sadrian ath_tx_default_comp(sc, bf, 0); 3564227364Sadrian } 3565227364Sadrian} 3566227364Sadrian 3567227364Sadrian/* 3568227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3569227364Sadrian * session. 3570227364Sadrian * 3571227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3572227364Sadrian * ath_tx_draintxq(). 3573227364Sadrian */ 3574227364Sadrianstatic void 3575227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3576227364Sadrian{ 3577227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3578227364Sadrian struct ath_node *an = ATH_NODE(ni); 3579227364Sadrian int tid = bf->bf_state.bfs_tid; 3580227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3581227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3582227364Sadrian 3583227364Sadrian /* 3584227364Sadrian * Update rate control status here, before we possibly 3585227364Sadrian * punt to retry or cleanup. 3586227364Sadrian * 3587227364Sadrian * Do it outside of the TXQ lock. 3588227364Sadrian */ 3589227364Sadrian if (fail == 0 && ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0)) 3590227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3591227364Sadrian &bf->bf_status.ds_txstat, 3592227364Sadrian bf->bf_state.bfs_pktlen, 3593227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3594227364Sadrian 3595227364Sadrian /* 3596227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3597227364Sadrian * This unfortunately means that it's released and regrabbed 3598227364Sadrian * during retry and cleanup. That's rather inefficient. 3599227364Sadrian */ 3600227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3601227364Sadrian 3602227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3603227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3604227364Sadrian 3605229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 3606229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 3607229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 3608229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3609227364Sadrian 3610227364Sadrian atid->hwq_depth--; 3611227364Sadrian if (atid->hwq_depth < 0) 3612227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3613227364Sadrian __func__, atid->hwq_depth); 3614227364Sadrian 3615227364Sadrian /* 3616227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3617227364Sadrian * rather than handling it here. It's thus their 3618227364Sadrian * responsibility to clean up, call the completion 3619227364Sadrian * function in net80211, etc. 3620227364Sadrian */ 3621227364Sadrian if (atid->cleanup_inprogress) { 3622227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3623229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 3624229949Sadrian __func__); 3625227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3626227364Sadrian return; 3627227364Sadrian } 3628227364Sadrian 3629227364Sadrian /* 3630227364Sadrian * Don't bother with the retry check if all frames 3631227364Sadrian * are being failed (eg during queue deletion.) 3632227364Sadrian */ 3633227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3634227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3635229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 3636229949Sadrian __func__); 3637227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3638227364Sadrian return; 3639227364Sadrian } 3640227364Sadrian 3641227364Sadrian /* Success? Complete */ 3642227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3643227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3644227364Sadrian if (bf->bf_state.bfs_dobaw) { 3645227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3646227364Sadrian bf->bf_state.bfs_dobaw = 0; 3647227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3648227364Sadrian device_printf(sc->sc_dev, 3649227364Sadrian "%s: wasn't added: seqno %d\n", 3650227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3651227364Sadrian } 3652227364Sadrian 3653227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3654227364Sadrian 3655227364Sadrian ath_tx_default_comp(sc, bf, fail); 3656227364Sadrian /* bf is freed at this point */ 3657227364Sadrian} 3658227364Sadrian 3659227364Sadrianvoid 3660227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3661227364Sadrian{ 3662227364Sadrian if (bf->bf_state.bfs_aggr) 3663227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 3664227364Sadrian else 3665227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 3666227364Sadrian} 3667227364Sadrian 3668227364Sadrian/* 3669227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3670227364Sadrian * 3671227364Sadrian * This is the aggregate version. 3672227364Sadrian */ 3673227364Sadrianvoid 3674227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 3675227364Sadrian struct ath_tid *tid) 3676227364Sadrian{ 3677227364Sadrian struct ath_buf *bf; 3678227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3679227364Sadrian struct ieee80211_tx_ampdu *tap; 3680227364Sadrian struct ieee80211_node *ni = &an->an_node; 3681227364Sadrian ATH_AGGR_STATUS status; 3682227364Sadrian ath_bufhead bf_q; 3683227364Sadrian 3684227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 3685227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3686227364Sadrian 3687227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3688227364Sadrian 3689227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 3690227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 3691227364Sadrian __func__); 3692227364Sadrian 3693227364Sadrian for (;;) { 3694227364Sadrian status = ATH_AGGR_DONE; 3695227364Sadrian 3696227364Sadrian /* 3697227364Sadrian * If the upper layer has paused the TID, don't 3698227364Sadrian * queue any further packets. 3699227364Sadrian * 3700227364Sadrian * This can also occur from the completion task because 3701227364Sadrian * of packet loss; but as its serialised with this code, 3702227364Sadrian * it won't "appear" half way through queuing packets. 3703227364Sadrian */ 3704227364Sadrian if (tid->paused) 3705227364Sadrian break; 3706227364Sadrian 3707227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3708227364Sadrian if (bf == NULL) { 3709227364Sadrian break; 3710227364Sadrian } 3711227364Sadrian 3712227364Sadrian /* 3713227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 3714227364Sadrian * data frame), schedule it directly; continue. 3715227364Sadrian */ 3716227364Sadrian if (! bf->bf_state.bfs_dobaw) { 3717229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3718229949Sadrian "%s: non-baw packet\n", 3719227364Sadrian __func__); 3720227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3721227364Sadrian bf->bf_state.bfs_aggr = 0; 3722227364Sadrian ath_tx_do_ratelookup(sc, bf); 3723227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3724227364Sadrian ath_tx_set_rtscts(sc, bf); 3725227364Sadrian ath_tx_setds(sc, bf); 3726227364Sadrian ath_tx_chaindesclist(sc, bf); 3727227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3728227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3729227364Sadrian 3730227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 3731227364Sadrian 3732227364Sadrian /* Queue the packet; continue */ 3733227364Sadrian goto queuepkt; 3734227364Sadrian } 3735227364Sadrian 3736227364Sadrian TAILQ_INIT(&bf_q); 3737227364Sadrian 3738227364Sadrian /* 3739227364Sadrian * Do a rate control lookup on the first frame in the 3740227364Sadrian * list. The rate control code needs that to occur 3741227364Sadrian * before it can determine whether to TX. 3742227364Sadrian * It's inaccurate because the rate control code doesn't 3743227364Sadrian * really "do" aggregate lookups, so it only considers 3744227364Sadrian * the size of the first frame. 3745227364Sadrian */ 3746227364Sadrian ath_tx_do_ratelookup(sc, bf); 3747227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 3748227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 3749227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3750227364Sadrian 3751227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 3752227364Sadrian 3753227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3754227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 3755227364Sadrian 3756227364Sadrian /* 3757227364Sadrian * No frames to be picked up - out of BAW 3758227364Sadrian */ 3759227364Sadrian if (TAILQ_EMPTY(&bf_q)) 3760227364Sadrian break; 3761227364Sadrian 3762227364Sadrian /* 3763227364Sadrian * This assumes that the descriptor list in the ath_bufhead 3764227364Sadrian * are already linked together via bf_next pointers. 3765227364Sadrian */ 3766227364Sadrian bf = TAILQ_FIRST(&bf_q); 3767227364Sadrian 3768227364Sadrian /* 3769227364Sadrian * If it's the only frame send as non-aggregate 3770227364Sadrian * assume that ath_tx_form_aggr() has checked 3771227364Sadrian * whether it's in the BAW and added it appropriately. 3772227364Sadrian */ 3773227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 3774227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3775227364Sadrian "%s: single-frame aggregate\n", __func__); 3776227364Sadrian bf->bf_state.bfs_aggr = 0; 3777227364Sadrian ath_tx_set_rtscts(sc, bf); 3778227364Sadrian ath_tx_setds(sc, bf); 3779227364Sadrian ath_tx_chaindesclist(sc, bf); 3780227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3781227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3782227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 3783227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 3784227364Sadrian else 3785227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 3786227364Sadrian } else { 3787227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3788229949Sadrian "%s: multi-frame aggregate: %d frames, " 3789229949Sadrian "length %d\n", 3790227364Sadrian __func__, bf->bf_state.bfs_nframes, 3791227364Sadrian bf->bf_state.bfs_al); 3792227364Sadrian bf->bf_state.bfs_aggr = 1; 3793227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 3794227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 3795227364Sadrian 3796227364Sadrian /* 3797227364Sadrian * Update the rate and rtscts information based on the 3798227364Sadrian * rate decision made by the rate control code; 3799227364Sadrian * the first frame in the aggregate needs it. 3800227364Sadrian */ 3801227364Sadrian ath_tx_set_rtscts(sc, bf); 3802227364Sadrian 3803227364Sadrian /* 3804227364Sadrian * Setup the relevant descriptor fields 3805227364Sadrian * for aggregation. The first descriptor 3806227364Sadrian * already points to the rest in the chain. 3807227364Sadrian */ 3808227364Sadrian ath_tx_setds_11n(sc, bf); 3809227364Sadrian 3810227364Sadrian /* 3811227364Sadrian * setup first desc with rate and aggr info 3812227364Sadrian */ 3813227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3814227364Sadrian } 3815227364Sadrian queuepkt: 3816227364Sadrian //txq = bf->bf_state.bfs_txq; 3817227364Sadrian 3818227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 3819227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 3820227364Sadrian 3821227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 3822227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 3823227364Sadrian 3824227364Sadrian /* Punt to txq */ 3825227364Sadrian ath_tx_handoff(sc, txq, bf); 3826227364Sadrian 3827227364Sadrian /* Track outstanding buffer count to hardware */ 3828227364Sadrian /* aggregates are "one" buffer */ 3829227364Sadrian tid->hwq_depth++; 3830227364Sadrian 3831227364Sadrian /* 3832227364Sadrian * Break out if ath_tx_form_aggr() indicated 3833227364Sadrian * there can't be any further progress (eg BAW is full.) 3834227364Sadrian * Checking for an empty txq is done above. 3835227364Sadrian * 3836227364Sadrian * XXX locking on txq here? 3837227364Sadrian */ 3838227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 3839227364Sadrian status == ATH_AGGR_BAW_CLOSED) 3840227364Sadrian break; 3841227364Sadrian } 3842227364Sadrian} 3843227364Sadrian 3844227364Sadrian/* 3845227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3846227364Sadrian */ 3847227364Sadrianvoid 3848227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 3849227364Sadrian struct ath_tid *tid) 3850227364Sadrian{ 3851227364Sadrian struct ath_buf *bf; 3852227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3853227364Sadrian struct ieee80211_node *ni = &an->an_node; 3854227364Sadrian 3855227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 3856227364Sadrian __func__, an, tid->tid); 3857227364Sadrian 3858227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3859227364Sadrian 3860227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 3861227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 3862227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 3863227364Sadrian __func__, tid->tid); 3864227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 3865227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 3866227364Sadrian __func__, tid->tid); 3867227364Sadrian 3868227364Sadrian for (;;) { 3869227364Sadrian 3870227364Sadrian /* 3871227364Sadrian * If the upper layers have paused the TID, don't 3872227364Sadrian * queue any further packets. 3873227364Sadrian */ 3874227364Sadrian if (tid->paused) 3875227364Sadrian break; 3876227364Sadrian 3877227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3878227364Sadrian if (bf == NULL) { 3879227364Sadrian break; 3880227364Sadrian } 3881227364Sadrian 3882227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3883227364Sadrian 3884227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 3885227364Sadrian 3886227364Sadrian /* Sanity check! */ 3887227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 3888227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 3889227364Sadrian " tid %d\n", 3890227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 3891227364Sadrian } 3892227364Sadrian /* Normal completion handler */ 3893227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3894227364Sadrian 3895227364Sadrian /* Program descriptors + rate control */ 3896227364Sadrian ath_tx_do_ratelookup(sc, bf); 3897227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3898227364Sadrian ath_tx_set_rtscts(sc, bf); 3899227364Sadrian ath_tx_setds(sc, bf); 3900227364Sadrian ath_tx_chaindesclist(sc, bf); 3901227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3902227364Sadrian 3903227364Sadrian /* Track outstanding buffer count to hardware */ 3904227364Sadrian /* aggregates are "one" buffer */ 3905227364Sadrian tid->hwq_depth++; 3906227364Sadrian 3907227364Sadrian /* Punt to hardware or software txq */ 3908227364Sadrian ath_tx_handoff(sc, txq, bf); 3909227364Sadrian } 3910227364Sadrian} 3911227364Sadrian 3912227364Sadrian/* 3913227364Sadrian * Schedule some packets to the given hardware queue. 3914227364Sadrian * 3915227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 3916227364Sadrian * with queued traffic) and attempts to schedule traffic 3917227364Sadrian * from them. 3918227364Sadrian * 3919227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 3920227364Sadrian * added to the end of the queue after some frames have been 3921227364Sadrian * scheduled. 3922227364Sadrian */ 3923227364Sadrianvoid 3924227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 3925227364Sadrian{ 3926227364Sadrian struct ath_tid *tid, *next, *last; 3927227364Sadrian 3928227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3929227364Sadrian 3930227364Sadrian /* 3931227364Sadrian * Don't schedule if the hardware queue is busy. 3932227364Sadrian * This (hopefully) gives some more time to aggregate 3933227364Sadrian * some packets in the aggregation queue. 3934227364Sadrian */ 3935227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 3936227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 3937227364Sadrian return; 3938227364Sadrian } 3939227364Sadrian 3940227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 3941227364Sadrian 3942227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 3943227364Sadrian /* 3944227364Sadrian * Suspend paused queues here; they'll be resumed 3945227364Sadrian * once the addba completes or times out. 3946227364Sadrian */ 3947227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 3948227364Sadrian __func__, tid->tid, tid->paused); 3949227364Sadrian ath_tx_tid_unsched(sc, tid); 3950227364Sadrian if (tid->paused) { 3951227364Sadrian continue; 3952227364Sadrian } 3953227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 3954227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 3955227364Sadrian else 3956227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 3957227364Sadrian 3958227364Sadrian /* Not empty? Re-schedule */ 3959227364Sadrian if (tid->axq_depth != 0) 3960227364Sadrian ath_tx_tid_sched(sc, tid); 3961227364Sadrian 3962227364Sadrian /* Give the software queue time to aggregate more packets */ 3963227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 3964227364Sadrian break; 3965227364Sadrian } 3966227364Sadrian 3967227364Sadrian /* 3968227364Sadrian * If this was the last entry on the original list, stop. 3969227364Sadrian * Otherwise nodes that have been rescheduled onto the end 3970227364Sadrian * of the TID FIFO list will just keep being rescheduled. 3971227364Sadrian */ 3972227364Sadrian if (tid == last) 3973227364Sadrian break; 3974227364Sadrian } 3975227364Sadrian} 3976227364Sadrian 3977227364Sadrian/* 3978227364Sadrian * TX addba handling 3979227364Sadrian */ 3980227364Sadrian 3981227364Sadrian/* 3982227364Sadrian * Return net80211 TID struct pointer, or NULL for none 3983227364Sadrian */ 3984227364Sadrianstruct ieee80211_tx_ampdu * 3985227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 3986227364Sadrian{ 3987227364Sadrian struct ieee80211_node *ni = &an->an_node; 3988227364Sadrian struct ieee80211_tx_ampdu *tap; 3989227364Sadrian int ac; 3990227364Sadrian 3991227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3992227364Sadrian return NULL; 3993227364Sadrian 3994227364Sadrian ac = TID_TO_WME_AC(tid); 3995227364Sadrian 3996227364Sadrian tap = &ni->ni_tx_ampdu[ac]; 3997227364Sadrian return tap; 3998227364Sadrian} 3999227364Sadrian 4000227364Sadrian/* 4001227364Sadrian * Is AMPDU-TX running? 4002227364Sadrian */ 4003227364Sadrianstatic int 4004227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 4005227364Sadrian{ 4006227364Sadrian struct ieee80211_tx_ampdu *tap; 4007227364Sadrian 4008227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4009227364Sadrian return 0; 4010227364Sadrian 4011227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4012227364Sadrian if (tap == NULL) 4013227364Sadrian return 0; /* Not valid; default to not running */ 4014227364Sadrian 4015227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 4016227364Sadrian} 4017227364Sadrian 4018227364Sadrian/* 4019227364Sadrian * Is AMPDU-TX negotiation pending? 4020227364Sadrian */ 4021227364Sadrianstatic int 4022227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 4023227364Sadrian{ 4024227364Sadrian struct ieee80211_tx_ampdu *tap; 4025227364Sadrian 4026227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4027227364Sadrian return 0; 4028227364Sadrian 4029227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4030227364Sadrian if (tap == NULL) 4031227364Sadrian return 0; /* Not valid; default to not pending */ 4032227364Sadrian 4033227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 4034227364Sadrian} 4035227364Sadrian 4036227364Sadrian/* 4037227364Sadrian * Is AMPDU-TX pending for the given TID? 4038227364Sadrian */ 4039227364Sadrian 4040227364Sadrian 4041227364Sadrian/* 4042227364Sadrian * Method to handle sending an ADDBA request. 4043227364Sadrian * 4044227364Sadrian * We tap this so the relevant flags can be set to pause the TID 4045227364Sadrian * whilst waiting for the response. 4046227364Sadrian * 4047227364Sadrian * XXX there's no timeout handler we can override? 4048227364Sadrian */ 4049227364Sadrianint 4050227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4051227364Sadrian int dialogtoken, int baparamset, int batimeout) 4052227364Sadrian{ 4053227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4054227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 4055227364Sadrian struct ath_node *an = ATH_NODE(ni); 4056227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4057227364Sadrian 4058227364Sadrian /* 4059227364Sadrian * XXX danger Will Robinson! 4060227364Sadrian * 4061227364Sadrian * Although the taskqueue may be running and scheduling some more 4062227364Sadrian * packets, these should all be _before_ the addba sequence number. 4063227364Sadrian * However, net80211 will keep self-assigning sequence numbers 4064227364Sadrian * until addba has been negotiated. 4065227364Sadrian * 4066227364Sadrian * In the past, these packets would be "paused" (which still works 4067227364Sadrian * fine, as they're being scheduled to the driver in the same 4068227364Sadrian * serialised method which is calling the addba request routine) 4069227364Sadrian * and when the aggregation session begins, they'll be dequeued 4070227364Sadrian * as aggregate packets and added to the BAW. However, now there's 4071227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 4072227364Sadrian * packets. Thus they never get included in the BAW tracking and 4073227364Sadrian * this can cause the initial burst of packets after the addba 4074227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 4075227364Sadrian * 4076227364Sadrian * The "eventual" solution should be to tag these packets with 4077227364Sadrian * dobaw. Although net80211 has given us a sequence number, 4078227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 4079227364Sadrian * fall within it. 4080227364Sadrian */ 4081227364Sadrian ath_tx_tid_pause(sc, atid); 4082227364Sadrian 4083227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4084227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 4085227364Sadrian __func__, dialogtoken, baparamset, batimeout); 4086227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4087227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4088227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4089227364Sadrian 4090227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 4091227364Sadrian batimeout); 4092227364Sadrian} 4093227364Sadrian 4094227364Sadrian/* 4095227364Sadrian * Handle an ADDBA response. 4096227364Sadrian * 4097227364Sadrian * We unpause the queue so TX'ing can resume. 4098227364Sadrian * 4099227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 4100227364Sadrian * aggregate or not) so the BAW is updated. 4101227364Sadrian * 4102227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 4103227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 4104227364Sadrian * edge won't match the ni->ni_txseq. 4105227364Sadrian * 4106227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 4107227364Sadrian * ni->ni_txseq. 4108227364Sadrian * 4109227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 4110227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 4111227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 4112227364Sadrian * window. 4113227364Sadrian */ 4114227364Sadrianint 4115227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4116227364Sadrian int status, int code, int batimeout) 4117227364Sadrian{ 4118227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4119227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 4120227364Sadrian struct ath_node *an = ATH_NODE(ni); 4121227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4122227364Sadrian int r; 4123227364Sadrian 4124227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4125227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 4126227364Sadrian status, code, batimeout); 4127227364Sadrian 4128227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4129227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4130227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4131227364Sadrian 4132227364Sadrian /* 4133227364Sadrian * Call this first, so the interface flags get updated 4134227364Sadrian * before the TID is unpaused. Otherwise a race condition 4135227364Sadrian * exists where the unpaused TID still doesn't yet have 4136227364Sadrian * IEEE80211_AGGR_RUNNING set. 4137227364Sadrian */ 4138227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 4139227364Sadrian 4140227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4141227364Sadrian /* 4142227364Sadrian * XXX dirty! 4143227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 4144227364Sadrian * Read above for more information. 4145227364Sadrian */ 4146227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 4147227364Sadrian ath_tx_tid_resume(sc, atid); 4148227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4149227364Sadrian return r; 4150227364Sadrian} 4151227364Sadrian 4152227364Sadrian 4153227364Sadrian/* 4154227364Sadrian * Stop ADDBA on a queue. 4155227364Sadrian */ 4156227364Sadrianvoid 4157227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 4158227364Sadrian{ 4159227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4160227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 4161227364Sadrian struct ath_node *an = ATH_NODE(ni); 4162227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4163227364Sadrian 4164227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 4165227364Sadrian 4166227364Sadrian /* Pause TID traffic early, so there aren't any races */ 4167227364Sadrian ath_tx_tid_pause(sc, atid); 4168227364Sadrian 4169227364Sadrian /* There's no need to hold the TXQ lock here */ 4170227364Sadrian sc->sc_addba_stop(ni, tap); 4171227364Sadrian 4172227364Sadrian /* 4173227364Sadrian * ath_tx_cleanup will resume the TID if possible, otherwise 4174227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 4175227364Sadrian * things have been cleaned up. 4176227364Sadrian */ 4177227364Sadrian ath_tx_cleanup(sc, an, tid); 4178227364Sadrian} 4179227364Sadrian 4180227364Sadrian/* 4181227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 4182227364Sadrian * it simply tears down the aggregation session. Ew. 4183227364Sadrian * 4184227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 4185227364Sadrian * ic->ic_addba_stop(). 4186227364Sadrian * 4187227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 4188227364Sadrian * XXX BAR TX success or failure should be better handled! 4189227364Sadrian */ 4190227364Sadrianvoid 4191227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4192227364Sadrian int status) 4193227364Sadrian{ 4194227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4195227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 4196227364Sadrian struct ath_node *an = ATH_NODE(ni); 4197227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4198227364Sadrian int attempts = tap->txa_attempts; 4199227364Sadrian 4200227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4201227364Sadrian "%s: called; status=%d\n", __func__, status); 4202227364Sadrian 4203227364Sadrian /* Note: This may update the BAW details */ 4204227364Sadrian sc->sc_bar_response(ni, tap, status); 4205227364Sadrian 4206227364Sadrian /* Unpause the TID */ 4207227364Sadrian /* 4208227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 4209227364Sadrian * XXX to a non-aggregate session. So we must unpause the 4210227364Sadrian * XXX TID here or it'll never be done. 4211227364Sadrian */ 4212227364Sadrian if (status == 0 || attempts == 50) { 4213227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4214227364Sadrian ath_tx_tid_resume(sc, atid); 4215227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4216227364Sadrian } 4217227364Sadrian} 4218227364Sadrian 4219227364Sadrian/* 4220227364Sadrian * This is called whenever the pending ADDBA request times out. 4221227364Sadrian * Unpause and reschedule the TID. 4222227364Sadrian */ 4223227364Sadrianvoid 4224227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 4225227364Sadrian struct ieee80211_tx_ampdu *tap) 4226227364Sadrian{ 4227227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4228227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 4229227364Sadrian struct ath_node *an = ATH_NODE(ni); 4230227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4231227364Sadrian 4232227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4233227364Sadrian "%s: called; resuming\n", __func__); 4234227364Sadrian 4235227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 4236227364Sadrian sc->sc_addba_response_timeout(ni, tap); 4237227364Sadrian 4238227364Sadrian /* Unpause the TID; which reschedules it */ 4239227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4240227364Sadrian ath_tx_tid_resume(sc, atid); 4241227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4242227364Sadrian} 4243