if_ath_tx.c revision 229949
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 229949 2012-01-11 00:16:44Z 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 ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc, 113227364Sadrian struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0); 114227364Sadrianstatic int ath_tx_action_frame_override_queue(struct ath_softc *sc, 115227364Sadrian struct ieee80211_node *ni, struct mbuf *m0, int *tid); 116227364Sadrian 117227364Sadrian/* 118218154Sadrian * Whether to use the 11n rate scenario functions or not 119218154Sadrian */ 120218154Sadrianstatic inline int 121218154Sadrianath_tx_is_11n(struct ath_softc *sc) 122218154Sadrian{ 123218154Sadrian return (sc->sc_ah->ah_magic == 0x20065416); 124218154Sadrian} 125218154Sadrian 126227364Sadrian/* 127227364Sadrian * Obtain the current TID from the given frame. 128227364Sadrian * 129227364Sadrian * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.) 130227364Sadrian * This has implications for which AC/priority the packet is placed 131227364Sadrian * in. 132227364Sadrian */ 133227364Sadrianstatic int 134227364Sadrianath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0) 135227364Sadrian{ 136227364Sadrian const struct ieee80211_frame *wh; 137227364Sadrian int pri = M_WME_GETAC(m0); 138227364Sadrian 139227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 140227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 141227364Sadrian return IEEE80211_NONQOS_TID; 142227364Sadrian else 143227364Sadrian return WME_AC_TO_TID(pri); 144227364Sadrian} 145227364Sadrian 146227364Sadrian/* 147227364Sadrian * Determine what the correct AC queue for the given frame 148227364Sadrian * should be. 149227364Sadrian * 150227364Sadrian * This code assumes that the TIDs map consistently to 151227364Sadrian * the underlying hardware (or software) ath_txq. 152227364Sadrian * Since the sender may try to set an AC which is 153227364Sadrian * arbitrary, non-QoS TIDs may end up being put on 154227364Sadrian * completely different ACs. There's no way to put a 155227364Sadrian * TID into multiple ath_txq's for scheduling, so 156227364Sadrian * for now we override the AC/TXQ selection and set 157227364Sadrian * non-QOS TID frames into the BE queue. 158227364Sadrian * 159227364Sadrian * This may be completely incorrect - specifically, 160227364Sadrian * some management frames may end up out of order 161227364Sadrian * compared to the QoS traffic they're controlling. 162227364Sadrian * I'll look into this later. 163227364Sadrian */ 164227364Sadrianstatic int 165227364Sadrianath_tx_getac(struct ath_softc *sc, const struct mbuf *m0) 166227364Sadrian{ 167227364Sadrian const struct ieee80211_frame *wh; 168227364Sadrian int pri = M_WME_GETAC(m0); 169227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 170227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh)) 171227364Sadrian return pri; 172227364Sadrian 173227364Sadrian return WME_AC_BE; 174227364Sadrian} 175227364Sadrian 176218065Sadrianvoid 177218065Sadrianath_txfrag_cleanup(struct ath_softc *sc, 178218065Sadrian ath_bufhead *frags, struct ieee80211_node *ni) 179218065Sadrian{ 180218065Sadrian struct ath_buf *bf, *next; 181218065Sadrian 182218065Sadrian ATH_TXBUF_LOCK_ASSERT(sc); 183218065Sadrian 184227344Sadrian TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) { 185218065Sadrian /* NB: bf assumed clean */ 186227344Sadrian TAILQ_REMOVE(frags, bf, bf_list); 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; 626227364Sadrian struct ath_buf *bf; 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 633227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 634227364Sadrian if (bf == NULL) 635227364Sadrian return; 636227364Sadrian 637227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 638227364Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 639227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 640218065Sadrian} 641218065Sadrian 642227364Sadrian/* 643227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 644227364Sadrian * 645227364Sadrian * The relevant hardware txq should be locked. 646227364Sadrian */ 647227364Sadrianstatic void 648227364Sadrianath_tx_handoff(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf) 649227364Sadrian{ 650227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 651227364Sadrian 652227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 653227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 654227364Sadrian else 655227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 656227364Sadrian} 657227364Sadrian 658218154Sadrianstatic int 659218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 660229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 661229949Sadrian int *keyix) 662218154Sadrian{ 663218154Sadrian if (iswep) { 664218154Sadrian const struct ieee80211_cipher *cip; 665218154Sadrian struct ieee80211_key *k; 666218154Sadrian 667218154Sadrian /* 668218154Sadrian * Construct the 802.11 header+trailer for an encrypted 669218154Sadrian * frame. The only reason this can fail is because of an 670218154Sadrian * unknown or unsupported cipher/key type. 671218154Sadrian */ 672218154Sadrian k = ieee80211_crypto_encap(ni, m0); 673218154Sadrian if (k == NULL) { 674218154Sadrian /* 675218154Sadrian * This can happen when the key is yanked after the 676218154Sadrian * frame was queued. Just discard the frame; the 677218154Sadrian * 802.11 layer counts failures and provides 678218154Sadrian * debugging/diagnostics. 679218154Sadrian */ 680229949Sadrian return (0); 681218154Sadrian } 682218154Sadrian /* 683218154Sadrian * Adjust the packet + header lengths for the crypto 684218154Sadrian * additions and calculate the h/w key index. When 685218154Sadrian * a s/w mic is done the frame will have had any mic 686218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 687218154Sadrian * account for it. Otherwise we need to add it to the 688218154Sadrian * packet length. 689218154Sadrian */ 690218154Sadrian cip = k->wk_cipher; 691218154Sadrian (*hdrlen) += cip->ic_header; 692218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 693218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 694218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 695218154Sadrian (*pktlen) += cip->ic_miclen; 696218154Sadrian (*keyix) = k->wk_keyix; 697218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 698218154Sadrian /* 699218154Sadrian * Use station key cache slot, if assigned. 700218154Sadrian */ 701218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 702218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 703218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 704218154Sadrian } else 705218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 706218154Sadrian 707229949Sadrian return (1); 708218154Sadrian} 709218154Sadrian 710218932Sadrianstatic uint8_t 711218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 712227364Sadrian int cix, int shortPreamble) 713218157Sadrian{ 714218932Sadrian uint8_t ctsrate; 715218932Sadrian 716218157Sadrian /* 717218157Sadrian * CTS transmit rate is derived from the transmit rate 718218157Sadrian * by looking in the h/w rate table. We must also factor 719218157Sadrian * in whether or not a short preamble is to be used. 720218157Sadrian */ 721218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 722218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 723218932Sadrian ctsrate = rt->info[cix].rateCode; 724218932Sadrian 725218932Sadrian /* XXX this should only matter for legacy rates */ 726218932Sadrian if (shortPreamble) 727218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 728218932Sadrian 729229949Sadrian return (ctsrate); 730218932Sadrian} 731218932Sadrian 732218932Sadrian/* 733218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 734218932Sadrian */ 735218932Sadrianstatic int 736218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 737218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 738218932Sadrian int flags) 739218932Sadrian{ 740218932Sadrian int ctsduration = 0; 741218932Sadrian 742218932Sadrian /* This mustn't be called for HT modes */ 743218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 744218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 745218932Sadrian __func__, rt->info[cix].rateCode); 746229949Sadrian return (-1); 747218932Sadrian } 748218932Sadrian 749218157Sadrian /* 750218157Sadrian * Compute the transmit duration based on the frame 751218157Sadrian * size and the size of an ACK frame. We call into the 752218157Sadrian * HAL to do the computation since it depends on the 753218157Sadrian * characteristics of the actual PHY being used. 754218157Sadrian * 755218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 756218157Sadrian * use the precalculated ACK durations. 757218157Sadrian */ 758218157Sadrian if (shortPreamble) { 759218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 760218932Sadrian ctsduration += rt->info[cix].spAckDuration; 761218932Sadrian ctsduration += ath_hal_computetxtime(ah, 762218157Sadrian rt, pktlen, rix, AH_TRUE); 763218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 764218932Sadrian ctsduration += rt->info[rix].spAckDuration; 765218157Sadrian } else { 766218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 767218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 768218932Sadrian ctsduration += ath_hal_computetxtime(ah, 769218157Sadrian rt, pktlen, rix, AH_FALSE); 770218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 771218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 772218157Sadrian } 773218932Sadrian 774229949Sadrian return (ctsduration); 775218157Sadrian} 776218157Sadrian 777227364Sadrian/* 778227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 779227364Sadrian * values. 780227364Sadrian * 781227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 782227364Sadrian * and cts duration must be re-calculated. 783227364Sadrian * 784227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 785227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 786227364Sadrian * 787227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 788227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 789227364Sadrian */ 790227364Sadrianstatic void 791227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 792218065Sadrian{ 793227364Sadrian uint16_t ctsduration = 0; 794227364Sadrian uint8_t ctsrate = 0; 795227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 796227364Sadrian uint8_t cix = 0; 797227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 798227364Sadrian 799227364Sadrian /* 800227364Sadrian * No RTS/CTS enabled? Don't bother. 801227364Sadrian */ 802227364Sadrian if ((bf->bf_state.bfs_flags & 803227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 804227364Sadrian /* XXX is this really needed? */ 805227364Sadrian bf->bf_state.bfs_ctsrate = 0; 806227364Sadrian bf->bf_state.bfs_ctsduration = 0; 807227364Sadrian return; 808227364Sadrian } 809227364Sadrian 810227364Sadrian /* 811227364Sadrian * If protection is enabled, use the protection rix control 812227364Sadrian * rate. Otherwise use the rate0 control rate. 813227364Sadrian */ 814227364Sadrian if (bf->bf_state.bfs_doprot) 815227364Sadrian rix = sc->sc_protrix; 816227364Sadrian else 817227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 818227364Sadrian 819227364Sadrian /* 820227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 821227364Sadrian * use it. 822227364Sadrian */ 823227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 824227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 825227364Sadrian else 826227364Sadrian /* Control rate from above */ 827227364Sadrian cix = rt->info[rix].controlRate; 828227364Sadrian 829227364Sadrian /* Calculate the rtscts rate for the given cix */ 830227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 831227364Sadrian bf->bf_state.bfs_shpream); 832227364Sadrian 833227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 834227364Sadrian if (! ath_tx_is_11n(sc)) 835227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 836227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 837227364Sadrian rt, bf->bf_state.bfs_flags); 838227364Sadrian 839227364Sadrian /* Squirrel away in ath_buf */ 840227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 841227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 842227364Sadrian 843227364Sadrian /* 844227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 845227364Sadrian * XXX TODO: only for pre-11n NICs. 846227364Sadrian */ 847227364Sadrian bf->bf_state.bfs_ismrr = 0; 848227364Sadrian bf->bf_state.bfs_try0 = 849227364Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 850227364Sadrian} 851227364Sadrian 852227364Sadrian/* 853227364Sadrian * Setup the descriptor chain for a normal or fast-frame 854227364Sadrian * frame. 855227364Sadrian */ 856227364Sadrianstatic void 857227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 858227364Sadrian{ 859227364Sadrian struct ath_desc *ds = bf->bf_desc; 860227364Sadrian struct ath_hal *ah = sc->sc_ah; 861227364Sadrian 862227364Sadrian ath_hal_setuptxdesc(ah, ds 863227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 864227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 865227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 866227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 867227364Sadrian , bf->bf_state.bfs_txrate0 868227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 869227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 870227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 871227364Sadrian , bf->bf_state.bfs_flags /* flags */ 872227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 873227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 874227364Sadrian ); 875227364Sadrian 876227364Sadrian /* 877227364Sadrian * This will be overriden when the descriptor chain is written. 878227364Sadrian */ 879227364Sadrian bf->bf_lastds = ds; 880227364Sadrian bf->bf_last = bf; 881227364Sadrian 882227364Sadrian /* XXX TODO: Setup descriptor chain */ 883227364Sadrian} 884227364Sadrian 885227364Sadrian/* 886227364Sadrian * Do a rate lookup. 887227364Sadrian * 888227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 889227364Sadrian * Non-data frames and raw frames don't require it. 890227364Sadrian * 891227364Sadrian * This populates the primary and MRR entries; MRR values are 892227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 893227364Sadrian * pre-11n chipsets. 894227364Sadrian * 895227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 896227364Sadrian * as they may depend upon the rate chosen. 897227364Sadrian */ 898227364Sadrianstatic void 899227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 900227364Sadrian{ 901227364Sadrian uint8_t rate, rix; 902227364Sadrian int try0; 903227364Sadrian 904227364Sadrian if (! bf->bf_state.bfs_doratelookup) 905227364Sadrian return; 906227364Sadrian 907227364Sadrian /* Get rid of any previous state */ 908227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 909227364Sadrian 910227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 911227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 912227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 913227364Sadrian 914227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 915227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 916227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 917227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 918227364Sadrian 919227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 920227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 921227364Sadrian bf->bf_state.bfs_rc); 922227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 923227364Sadrian 924227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 925227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 926227364Sadrian bf->bf_state.bfs_try0 = try0; 927227364Sadrian bf->bf_state.bfs_txrate0 = rate; 928227364Sadrian} 929227364Sadrian 930227364Sadrian/* 931227364Sadrian * Set the rate control fields in the given descriptor based on 932227364Sadrian * the bf_state fields and node state. 933227364Sadrian * 934227364Sadrian * The bfs fields should already be set with the relevant rate 935227364Sadrian * control information, including whether MRR is to be enabled. 936227364Sadrian * 937227364Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 938227364Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 939227364Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 940227364Sadrian * unconditionally for 11n chips. These require the 11n rate 941227364Sadrian * scenario to be set if MCS rates are enabled, so it's easier 942227364Sadrian * to just always call it. The caller can then only set rates 2, 3 943227364Sadrian * and 4 if multi-rate retry is needed. 944227364Sadrian */ 945227364Sadrianstatic void 946227364Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 947227364Sadrian struct ath_buf *bf) 948227364Sadrian{ 949227364Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 950227364Sadrian 951227364Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 952227364Sadrian if (! bf->bf_state.bfs_ismrr) 953227364Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 954227364Sadrian 955227364Sadrian /* 956227364Sadrian * Always call - that way a retried descriptor will 957227364Sadrian * have the MRR fields overwritten. 958227364Sadrian * 959227364Sadrian * XXX TODO: see if this is really needed - setting up 960227364Sadrian * the first descriptor should set the MRR fields to 0 961227364Sadrian * for us anyway. 962227364Sadrian */ 963227364Sadrian if (ath_tx_is_11n(sc)) { 964227364Sadrian ath_buf_set_rate(sc, ni, bf); 965227364Sadrian } else { 966227364Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 967227364Sadrian , rc[1].ratecode, rc[1].tries 968227364Sadrian , rc[2].ratecode, rc[2].tries 969227364Sadrian , rc[3].ratecode, rc[3].tries 970227364Sadrian ); 971227364Sadrian } 972227364Sadrian} 973227364Sadrian 974227364Sadrian/* 975227364Sadrian * Transmit the given frame to the hardware. 976227364Sadrian * 977227364Sadrian * The frame must already be setup; rate control must already have 978227364Sadrian * been done. 979227364Sadrian * 980227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 981227364Sadrian * it for this long when not doing software aggregation), later on 982227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 983227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 984227364Sadrian */ 985227364Sadrianstatic void 986227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 987227364Sadrian struct ath_buf *bf) 988227364Sadrian{ 989227364Sadrian 990227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 991227364Sadrian 992227364Sadrian /* Setup the descriptor before handoff */ 993227364Sadrian ath_tx_do_ratelookup(sc, bf); 994227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 995227364Sadrian ath_tx_set_rtscts(sc, bf); 996227364Sadrian ath_tx_setds(sc, bf); 997227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 998227364Sadrian ath_tx_chaindesclist(sc, bf); 999227364Sadrian 1000227364Sadrian /* Hand off to hardware */ 1001227364Sadrian ath_tx_handoff(sc, txq, bf); 1002227364Sadrian} 1003227364Sadrian 1004227364Sadrian 1005227364Sadrian 1006227364Sadrianstatic int 1007227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1008227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1009227364Sadrian{ 1010218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1011218065Sadrian struct ath_vap *avp = ATH_VAP(vap); 1012218065Sadrian struct ath_hal *ah = sc->sc_ah; 1013218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1014218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1015218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1016218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1017227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1018227364Sadrian u_int8_t rix = 0, txrate = 0; 1019218065Sadrian struct ath_desc *ds; 1020218065Sadrian struct ath_txq *txq; 1021218065Sadrian struct ieee80211_frame *wh; 1022227364Sadrian u_int subtype, flags; 1023218065Sadrian HAL_PKT_TYPE atype; 1024218065Sadrian const HAL_RATE_TABLE *rt; 1025218065Sadrian HAL_BOOL shortPreamble; 1026218065Sadrian struct ath_node *an; 1027218065Sadrian u_int pri; 1028218065Sadrian 1029218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1030218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1031218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1032218065Sadrian isfrag = m0->m_flags & M_FRAG; 1033218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1034218065Sadrian /* 1035218065Sadrian * Packet length must not include any 1036218065Sadrian * pad bytes; deduct them here. 1037218065Sadrian */ 1038218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1039218065Sadrian 1040218154Sadrian /* Handle encryption twiddling if needed */ 1041227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1042227364Sadrian &pktlen, &keyix)) { 1043218154Sadrian ath_freetx(m0); 1044218154Sadrian return EIO; 1045218154Sadrian } 1046218065Sadrian 1047218154Sadrian /* packet header may have moved, reset our local pointer */ 1048218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1049218065Sadrian 1050218065Sadrian pktlen += IEEE80211_CRC_LEN; 1051218065Sadrian 1052218065Sadrian /* 1053218065Sadrian * Load the DMA map so any coalescing is done. This 1054218065Sadrian * also calculates the number of descriptors we need. 1055218065Sadrian */ 1056218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1057218065Sadrian if (error != 0) 1058218065Sadrian return error; 1059218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1060218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1061218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1062218065Sadrian 1063218065Sadrian /* setup descriptors */ 1064218065Sadrian ds = bf->bf_desc; 1065218065Sadrian rt = sc->sc_currates; 1066218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1067218065Sadrian 1068218065Sadrian /* 1069218065Sadrian * NB: the 802.11 layer marks whether or not we should 1070218065Sadrian * use short preamble based on the current mode and 1071218065Sadrian * negotiated parameters. 1072218065Sadrian */ 1073218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1074218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1075218065Sadrian shortPreamble = AH_TRUE; 1076218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1077218065Sadrian } else { 1078218065Sadrian shortPreamble = AH_FALSE; 1079218065Sadrian } 1080218065Sadrian 1081218065Sadrian an = ATH_NODE(ni); 1082218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1083218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1084218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1085218065Sadrian /* XXX use txparams instead of fixed values */ 1086218065Sadrian /* 1087218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1088218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1089218065Sadrian */ 1090218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1091218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1092218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1093218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1094218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1095218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1096218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1097218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1098218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1099218065Sadrian else 1100218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1101218065Sadrian rix = an->an_mgmtrix; 1102218065Sadrian txrate = rt->info[rix].rateCode; 1103218065Sadrian if (shortPreamble) 1104218065Sadrian txrate |= rt->info[rix].shortPreamble; 1105218065Sadrian try0 = ATH_TXMGTTRY; 1106218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1107218065Sadrian break; 1108218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1109218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1110218065Sadrian rix = an->an_mgmtrix; 1111218065Sadrian txrate = rt->info[rix].rateCode; 1112218065Sadrian if (shortPreamble) 1113218065Sadrian txrate |= rt->info[rix].shortPreamble; 1114218065Sadrian try0 = ATH_TXMGTTRY; 1115218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1116218065Sadrian break; 1117218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1118218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1119218065Sadrian /* 1120218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1121218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1122218065Sadrian * the rate control module for the rate to use. 1123218065Sadrian */ 1124218065Sadrian if (ismcast) { 1125218065Sadrian rix = an->an_mcastrix; 1126218065Sadrian txrate = rt->info[rix].rateCode; 1127218065Sadrian if (shortPreamble) 1128218065Sadrian txrate |= rt->info[rix].shortPreamble; 1129218065Sadrian try0 = 1; 1130218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1131218065Sadrian /* XXX? maybe always use long preamble? */ 1132218065Sadrian rix = an->an_mgmtrix; 1133218065Sadrian txrate = rt->info[rix].rateCode; 1134218065Sadrian if (shortPreamble) 1135218065Sadrian txrate |= rt->info[rix].shortPreamble; 1136218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1137218065Sadrian } else { 1138227364Sadrian /* 1139227364Sadrian * Do rate lookup on each TX, rather than using 1140227364Sadrian * the hard-coded TX information decided here. 1141227364Sadrian */ 1142227364Sadrian ismrr = 1; 1143227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1144218065Sadrian } 1145218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1146218065Sadrian flags |= HAL_TXDESC_NOACK; 1147218065Sadrian break; 1148218065Sadrian default: 1149218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1150218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1151218065Sadrian /* XXX statistic */ 1152218065Sadrian ath_freetx(m0); 1153218065Sadrian return EIO; 1154218065Sadrian } 1155218065Sadrian txq = sc->sc_ac2q[pri]; 1156218065Sadrian 1157218065Sadrian /* 1158218065Sadrian * When servicing one or more stations in power-save mode 1159218065Sadrian * (or) if there is some mcast data waiting on the mcast 1160218065Sadrian * queue (to prevent out of order delivery) multicast 1161218065Sadrian * frames must be buffered until after the beacon. 1162218065Sadrian */ 1163218065Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1164218065Sadrian txq = &avp->av_mcastq; 1165218065Sadrian 1166218065Sadrian /* 1167218065Sadrian * Calculate miscellaneous flags. 1168218065Sadrian */ 1169218065Sadrian if (ismcast) { 1170218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1171218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1172218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1173218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1174218065Sadrian sc->sc_stats.ast_tx_rts++; 1175218065Sadrian } 1176218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1177218065Sadrian sc->sc_stats.ast_tx_noack++; 1178218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1179218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1180218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1181218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1182218065Sadrian sc->sc_stats.ast_tdma_ack++; 1183218065Sadrian ath_freetx(m0); 1184218065Sadrian return EIO; 1185218065Sadrian } 1186218065Sadrian#endif 1187218065Sadrian 1188218065Sadrian /* 1189218065Sadrian * If 802.11g protection is enabled, determine whether 1190218065Sadrian * to use RTS/CTS or just CTS. Note that this is only 1191218065Sadrian * done for OFDM unicast frames. 1192218065Sadrian */ 1193218065Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 1194218065Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 1195218065Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1196227364Sadrian bf->bf_state.bfs_doprot = 1; 1197218065Sadrian /* XXX fragments must use CCK rates w/ protection */ 1198227364Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 1199218065Sadrian flags |= HAL_TXDESC_RTSENA; 1200227364Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 1201218065Sadrian flags |= HAL_TXDESC_CTSENA; 1202227364Sadrian } 1203227364Sadrian /* 1204227364Sadrian * For frags it would be desirable to use the 1205227364Sadrian * highest CCK rate for RTS/CTS. But stations 1206227364Sadrian * farther away may detect it at a lower CCK rate 1207227364Sadrian * so use the configured protection rate instead 1208227364Sadrian * (for now). 1209227364Sadrian */ 1210218065Sadrian sc->sc_stats.ast_tx_protect++; 1211218065Sadrian } 1212218065Sadrian 1213220098Sadrian#if 0 1214218065Sadrian /* 1215220098Sadrian * If 11n protection is enabled and it's a HT frame, 1216220098Sadrian * enable RTS. 1217220098Sadrian * 1218220098Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 1219220098Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 1220220098Sadrian * XXX indicates it's not a HT pure environment? 1221220098Sadrian */ 1222220098Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 1223220098Sadrian rt->info[rix].phy == IEEE80211_T_HT && 1224220098Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1225220098Sadrian cix = rt->info[sc->sc_protrix].controlRate; 1226220098Sadrian flags |= HAL_TXDESC_RTSENA; 1227220098Sadrian sc->sc_stats.ast_tx_htprotect++; 1228220098Sadrian } 1229220098Sadrian#endif 1230220098Sadrian 1231220098Sadrian /* 1232218065Sadrian * Calculate duration. This logically belongs in the 802.11 1233218065Sadrian * layer but it lacks sufficient information to calculate it. 1234218065Sadrian */ 1235218065Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 1236218065Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 1237218065Sadrian u_int16_t dur; 1238218065Sadrian if (shortPreamble) 1239218065Sadrian dur = rt->info[rix].spAckDuration; 1240218065Sadrian else 1241218065Sadrian dur = rt->info[rix].lpAckDuration; 1242218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 1243218065Sadrian dur += dur; /* additional SIFS+ACK */ 1244218065Sadrian KASSERT(m0->m_nextpkt != NULL, ("no fragment")); 1245218065Sadrian /* 1246218065Sadrian * Include the size of next fragment so NAV is 1247218065Sadrian * updated properly. The last fragment uses only 1248218065Sadrian * the ACK duration 1249218065Sadrian */ 1250218065Sadrian dur += ath_hal_computetxtime(ah, rt, 1251218065Sadrian m0->m_nextpkt->m_pkthdr.len, 1252218065Sadrian rix, shortPreamble); 1253218065Sadrian } 1254218065Sadrian if (isfrag) { 1255218065Sadrian /* 1256218065Sadrian * Force hardware to use computed duration for next 1257218065Sadrian * fragment by disabling multi-rate retry which updates 1258218065Sadrian * duration based on the multi-rate duration table. 1259218065Sadrian */ 1260218065Sadrian ismrr = 0; 1261218065Sadrian try0 = ATH_TXMGTTRY; /* XXX? */ 1262218065Sadrian } 1263218065Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 1264218065Sadrian } 1265218065Sadrian 1266218065Sadrian /* 1267227364Sadrian * Determine if a tx interrupt should be generated for 1268227364Sadrian * this descriptor. We take a tx interrupt to reap 1269227364Sadrian * descriptors when the h/w hits an EOL condition or 1270227364Sadrian * when the descriptor is specifically marked to generate 1271227364Sadrian * an interrupt. We periodically mark descriptors in this 1272227364Sadrian * way to insure timely replenishing of the supply needed 1273227364Sadrian * for sending frames. Defering interrupts reduces system 1274227364Sadrian * load and potentially allows more concurrent work to be 1275227364Sadrian * done but if done to aggressively can cause senders to 1276227364Sadrian * backup. 1277227364Sadrian * 1278227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1279227364Sadrian * dynamically through sysctl. 1280218065Sadrian */ 1281227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1282227364Sadrian txq->axq_intrcnt = 0; 1283227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1284227364Sadrian flags |= HAL_TXDESC_INTREQ; 1285227364Sadrian txq->axq_intrcnt = 0; 1286227364Sadrian } 1287218932Sadrian 1288227364Sadrian /* This point forward is actual TX bits */ 1289218065Sadrian 1290218065Sadrian /* 1291218065Sadrian * At this point we are committed to sending the frame 1292218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1293218065Sadrian * case this frame is part of frag chain. 1294218065Sadrian */ 1295218065Sadrian m0->m_nextpkt = NULL; 1296218065Sadrian 1297218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1298218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1299218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1300218065Sadrian 1301218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1302218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1303218065Sadrian 1304218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1305218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1306218065Sadrian if (iswep) 1307218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1308218065Sadrian if (isfrag) 1309218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1310218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1311218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1312218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1313218065Sadrian 1314218065Sadrian ieee80211_radiotap_tx(vap, m0); 1315218065Sadrian } 1316218065Sadrian 1317227364Sadrian /* Blank the legacy rate array */ 1318227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1319227364Sadrian 1320218065Sadrian /* 1321227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1322227364Sadrian * the rate scenario. 1323227364Sadrian */ 1324227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1325227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1326227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1327227364Sadrian 1328227364Sadrian /* Store the decided rate index values away */ 1329227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1330227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1331227364Sadrian bf->bf_state.bfs_atype = atype; 1332227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1333227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1334227364Sadrian bf->bf_state.bfs_try0 = try0; 1335227364Sadrian bf->bf_state.bfs_keyix = keyix; 1336227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1337227364Sadrian bf->bf_state.bfs_flags = flags; 1338227364Sadrian bf->bf_txflags = flags; 1339227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1340227364Sadrian 1341227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1342227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1343227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1344227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1345227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1346227364Sadrian 1347227364Sadrian return 0; 1348227364Sadrian} 1349227364Sadrian 1350227364Sadrian/* 1351227364Sadrian * Direct-dispatch the current frame to the hardware. 1352227364Sadrian * 1353227364Sadrian * This can be called by the net80211 code. 1354227364Sadrian * 1355227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1356227364Sadrian * XXX aggregate scheduler so its serialised? 1357227364Sadrian */ 1358227364Sadrianint 1359227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1360227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1361227364Sadrian{ 1362227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1363227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1364227364Sadrian int r; 1365227364Sadrian u_int pri; 1366227364Sadrian int tid; 1367227364Sadrian struct ath_txq *txq; 1368227364Sadrian int ismcast; 1369227364Sadrian const struct ieee80211_frame *wh; 1370227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1371227364Sadrian ieee80211_seq seqno; 1372227364Sadrian uint8_t type, subtype; 1373227364Sadrian 1374227364Sadrian /* 1375227364Sadrian * Determine the target hardware queue. 1376218065Sadrian * 1377227364Sadrian * For multicast frames, the txq gets overridden to be the 1378227364Sadrian * software TXQ and it's done via direct-dispatch. 1379227364Sadrian * 1380227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1381227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1382227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1383227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1384227364Sadrian * having a node TID queued to multiple hardware TXQs. 1385227364Sadrian * This may change in the future but would require some locking 1386227364Sadrian * fudgery. 1387218065Sadrian */ 1388227364Sadrian pri = ath_tx_getac(sc, m0); 1389227364Sadrian tid = ath_tx_gettid(sc, m0); 1390218065Sadrian 1391227364Sadrian txq = sc->sc_ac2q[pri]; 1392227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1393227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1394227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1395227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1396227364Sadrian 1397227364Sadrian /* A-MPDU TX */ 1398227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1399227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1400227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1401227364Sadrian 1402227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1403227364Sadrian __func__, tid, pri, is_ampdu); 1404227364Sadrian 1405227364Sadrian /* Multicast frames go onto the software multicast queue */ 1406227364Sadrian if (ismcast) 1407227364Sadrian txq = &avp->av_mcastq; 1408227364Sadrian 1409227364Sadrian if ((! is_ampdu) && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1410227364Sadrian txq = &avp->av_mcastq; 1411227364Sadrian 1412227364Sadrian /* Do the generic frame setup */ 1413227364Sadrian /* XXX should just bzero the bf_state? */ 1414227364Sadrian bf->bf_state.bfs_dobaw = 0; 1415227364Sadrian 1416227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1417227364Sadrian /* Don't do it whilst pending; the net80211 layer still assigns them */ 1418227364Sadrian /* XXX do we need locking here? */ 1419227364Sadrian if (is_ampdu_tx) { 1420227364Sadrian ATH_TXQ_LOCK(txq); 1421227364Sadrian /* 1422227364Sadrian * Always call; this function will 1423227364Sadrian * handle making sure that null data frames 1424227364Sadrian * don't get a sequence number from the current 1425227364Sadrian * TID and thus mess with the BAW. 1426227364Sadrian */ 1427227364Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1428227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1429227364Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1430227364Sadrian bf->bf_state.bfs_dobaw = 1; 1431227364Sadrian } 1432227364Sadrian ATH_TXQ_UNLOCK(txq); 1433218240Sadrian } 1434218240Sadrian 1435218065Sadrian /* 1436227364Sadrian * If needed, the sequence number has been assigned. 1437227364Sadrian * Squirrel it away somewhere easy to get to. 1438218065Sadrian */ 1439227364Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1440227364Sadrian 1441227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1442227364Sadrian if (is_ampdu_pending) 1443227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1444227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1445227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1446227364Sadrian 1447227364Sadrian /* This also sets up the DMA map */ 1448227364Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0); 1449227364Sadrian 1450227364Sadrian if (r != 0) 1451227364Sadrian return r; 1452227364Sadrian 1453227364Sadrian /* At this point m0 could have changed! */ 1454227364Sadrian m0 = bf->bf_m; 1455227364Sadrian 1456227364Sadrian#if 1 1457218065Sadrian /* 1458227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1459227364Sadrian * destination hardware queue. Don't bother software 1460227364Sadrian * queuing it. 1461218065Sadrian */ 1462227364Sadrian /* 1463227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1464227364Sadrian * destination hardware queue. Don't bother software 1465227364Sadrian * queuing it, as the TID will now be paused. 1466227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1467227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1468227364Sadrian * It queues directly to hardware because the TID is paused 1469227364Sadrian * at this point (and won't be unpaused until the BAR has 1470227364Sadrian * either been TXed successfully or max retries has been 1471227364Sadrian * reached.) 1472227364Sadrian */ 1473227364Sadrian if (txq == &avp->av_mcastq) { 1474227364Sadrian ATH_TXQ_LOCK(txq); 1475227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1476227364Sadrian ATH_TXQ_UNLOCK(txq); 1477227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1478227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1479227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 1480227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1481227364Sadrian ATH_TXQ_LOCK(txq); 1482227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1483227364Sadrian ATH_TXQ_UNLOCK(txq); 1484227364Sadrian } else { 1485227364Sadrian /* add to software queue */ 1486227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1487227364Sadrian } 1488227364Sadrian#else 1489227364Sadrian /* 1490227364Sadrian * For now, since there's no software queue, 1491227364Sadrian * direct-dispatch to the hardware. 1492227364Sadrian */ 1493227364Sadrian ATH_TXQ_LOCK(txq); 1494227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1495227364Sadrian ATH_TXQ_UNLOCK(txq); 1496227364Sadrian#endif 1497218065Sadrian 1498218065Sadrian return 0; 1499218065Sadrian} 1500218065Sadrian 1501218065Sadrianstatic int 1502218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1503218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1504218065Sadrian const struct ieee80211_bpf_params *params) 1505218065Sadrian{ 1506218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1507218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1508218065Sadrian struct ath_hal *ah = sc->sc_ah; 1509218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1510218065Sadrian int error, ismcast, ismrr; 1511218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1512227364Sadrian u_int8_t rix, txrate; 1513218065Sadrian struct ieee80211_frame *wh; 1514227364Sadrian u_int flags; 1515218065Sadrian HAL_PKT_TYPE atype; 1516218065Sadrian const HAL_RATE_TABLE *rt; 1517218065Sadrian struct ath_desc *ds; 1518218065Sadrian u_int pri; 1519227364Sadrian int o_tid = -1; 1520227364Sadrian int do_override; 1521218065Sadrian 1522218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1523218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1524218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1525218065Sadrian /* 1526218065Sadrian * Packet length must not include any 1527218065Sadrian * pad bytes; deduct them here. 1528218065Sadrian */ 1529218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1530218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1531218065Sadrian 1532227364Sadrian 1533227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1534227364Sadrian __func__, ismcast); 1535227364Sadrian 1536218154Sadrian /* Handle encryption twiddling if needed */ 1537227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1538227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1539227364Sadrian &hdrlen, &pktlen, &keyix)) { 1540218154Sadrian ath_freetx(m0); 1541218154Sadrian return EIO; 1542218154Sadrian } 1543218154Sadrian /* packet header may have moved, reset our local pointer */ 1544218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1545218065Sadrian 1546227364Sadrian /* Do the generic frame setup */ 1547227364Sadrian /* XXX should just bzero the bf_state? */ 1548227364Sadrian bf->bf_state.bfs_dobaw = 0; 1549227364Sadrian 1550218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1551218065Sadrian if (error != 0) 1552218065Sadrian return error; 1553218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1554218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1555218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1556218065Sadrian 1557218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1558218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1559218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1560218065Sadrian flags |= HAL_TXDESC_RTSENA; 1561227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1562227364Sadrian /* XXX assume 11g/11n protection? */ 1563227364Sadrian bf->bf_state.bfs_doprot = 1; 1564218065Sadrian flags |= HAL_TXDESC_CTSENA; 1565227364Sadrian } 1566218065Sadrian /* XXX leave ismcast to injector? */ 1567218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1568218065Sadrian flags |= HAL_TXDESC_NOACK; 1569218065Sadrian 1570218065Sadrian rt = sc->sc_currates; 1571218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1572218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1573218065Sadrian txrate = rt->info[rix].rateCode; 1574218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1575218065Sadrian txrate |= rt->info[rix].shortPreamble; 1576218065Sadrian sc->sc_txrix = rix; 1577218065Sadrian try0 = params->ibp_try0; 1578218065Sadrian ismrr = (params->ibp_try1 != 0); 1579218065Sadrian txantenna = params->ibp_pri >> 2; 1580218065Sadrian if (txantenna == 0) /* XXX? */ 1581218065Sadrian txantenna = sc->sc_txantenna; 1582218157Sadrian 1583227364Sadrian /* 1584227364Sadrian * Since ctsrate is fixed, store it away for later 1585227364Sadrian * use when the descriptor fields are being set. 1586227364Sadrian */ 1587227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1588227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1589218157Sadrian 1590218065Sadrian pri = params->ibp_pri & 3; 1591227364Sadrian /* Override pri if the frame isn't a QoS one */ 1592227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1593227364Sadrian pri = ath_tx_getac(sc, m0); 1594227364Sadrian 1595218065Sadrian /* 1596218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1597218065Sadrian * set the sequence number, duration, etc. 1598218065Sadrian */ 1599218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1600218065Sadrian 1601218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1602218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1603218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1604218065Sadrian 1605218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1606218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1607218065Sadrian 1608218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1609218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1610218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1611218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1612218065Sadrian if (m0->m_flags & M_FRAG) 1613218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1614218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1615218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1616218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1617218065Sadrian 1618218065Sadrian ieee80211_radiotap_tx(vap, m0); 1619218065Sadrian } 1620218065Sadrian 1621218065Sadrian /* 1622218065Sadrian * Formulate first tx descriptor with tx controls. 1623218065Sadrian */ 1624218065Sadrian ds = bf->bf_desc; 1625218065Sadrian /* XXX check return value? */ 1626227364Sadrian 1627227364Sadrian /* Store the decided rate index values away */ 1628227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1629227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1630227364Sadrian bf->bf_state.bfs_atype = atype; 1631227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1632227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1633227364Sadrian bf->bf_state.bfs_try0 = try0; 1634227364Sadrian bf->bf_state.bfs_keyix = keyix; 1635227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1636227364Sadrian bf->bf_state.bfs_flags = flags; 1637218065Sadrian bf->bf_txflags = flags; 1638227364Sadrian bf->bf_state.bfs_shpream = 1639227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1640218065Sadrian 1641227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1642227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1643227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1644227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1645218240Sadrian 1646227364Sadrian /* Blank the legacy rate array */ 1647227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1648218240Sadrian 1649227364Sadrian bf->bf_state.bfs_rc[0].rix = 1650227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1651227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1652227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1653227364Sadrian 1654227364Sadrian if (ismrr) { 1655227364Sadrian int rix; 1656227364Sadrian 1657227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1658227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1659227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1660227364Sadrian 1661227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1662227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1663227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1664227364Sadrian 1665227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1666227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1667227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1668218065Sadrian } 1669227364Sadrian /* 1670227364Sadrian * All the required rate control decisions have been made; 1671227364Sadrian * fill in the rc flags. 1672227364Sadrian */ 1673227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1674218065Sadrian 1675227364Sadrian /* NB: no buffered multicast in power save support */ 1676227364Sadrian 1677227364Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1678227364Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1679227364Sadrian 1680227364Sadrian /* Map ADDBA to the correct priority */ 1681227364Sadrian if (do_override) { 1682227364Sadrian#if 0 1683227364Sadrian device_printf(sc->sc_dev, 1684227364Sadrian "%s: overriding tid %d pri %d -> %d\n", 1685227364Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1686227364Sadrian#endif 1687227364Sadrian pri = TID_TO_WME_AC(o_tid); 1688218240Sadrian } 1689218240Sadrian 1690227364Sadrian /* 1691227364Sadrian * If we're overiding the ADDBA destination, dump directly 1692227364Sadrian * into the hardware queue, right after any pending 1693227364Sadrian * frames to that node are. 1694227364Sadrian */ 1695227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1696227364Sadrian __func__, do_override); 1697227364Sadrian 1698227364Sadrian if (do_override) { 1699227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1700227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1701227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1702227364Sadrian } else { 1703227364Sadrian /* Queue to software queue */ 1704227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1705227364Sadrian } 1706227364Sadrian 1707218065Sadrian return 0; 1708218065Sadrian} 1709218065Sadrian 1710227364Sadrian/* 1711227364Sadrian * Send a raw frame. 1712227364Sadrian * 1713227364Sadrian * This can be called by net80211. 1714227364Sadrian */ 1715218065Sadrianint 1716218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1717218065Sadrian const struct ieee80211_bpf_params *params) 1718218065Sadrian{ 1719218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1720218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1721218065Sadrian struct ath_softc *sc = ifp->if_softc; 1722218065Sadrian struct ath_buf *bf; 1723218065Sadrian int error; 1724218065Sadrian 1725227651Sadrian ATH_PCU_LOCK(sc); 1726227651Sadrian if (sc->sc_inreset_cnt > 0) { 1727227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 1728227651Sadrian __func__); 1729227651Sadrian error = EIO; 1730227651Sadrian ATH_PCU_UNLOCK(sc); 1731227651Sadrian goto bad0; 1732227651Sadrian } 1733227651Sadrian sc->sc_txstart_cnt++; 1734227651Sadrian ATH_PCU_UNLOCK(sc); 1735227651Sadrian 1736218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 1737218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 1738218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 1739218065Sadrian "!running" : "invalid"); 1740218065Sadrian m_freem(m); 1741218065Sadrian error = ENETDOWN; 1742218065Sadrian goto bad; 1743218065Sadrian } 1744218065Sadrian /* 1745218065Sadrian * Grab a TX buffer and associated resources. 1746218065Sadrian */ 1747218065Sadrian bf = ath_getbuf(sc); 1748218065Sadrian if (bf == NULL) { 1749218065Sadrian sc->sc_stats.ast_tx_nobuf++; 1750218065Sadrian m_freem(m); 1751218065Sadrian error = ENOBUFS; 1752218065Sadrian goto bad; 1753218065Sadrian } 1754218065Sadrian 1755218065Sadrian if (params == NULL) { 1756218065Sadrian /* 1757218065Sadrian * Legacy path; interpret frame contents to decide 1758218065Sadrian * precisely how to send the frame. 1759218065Sadrian */ 1760218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 1761218065Sadrian error = EIO; /* XXX */ 1762218065Sadrian goto bad2; 1763218065Sadrian } 1764218065Sadrian } else { 1765218065Sadrian /* 1766218065Sadrian * Caller supplied explicit parameters to use in 1767218065Sadrian * sending the frame. 1768218065Sadrian */ 1769218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 1770218065Sadrian error = EIO; /* XXX */ 1771218065Sadrian goto bad2; 1772218065Sadrian } 1773218065Sadrian } 1774218065Sadrian sc->sc_wd_timer = 5; 1775218065Sadrian ifp->if_opackets++; 1776218065Sadrian sc->sc_stats.ast_tx_raw++; 1777218065Sadrian 1778227651Sadrian ATH_PCU_LOCK(sc); 1779227651Sadrian sc->sc_txstart_cnt--; 1780227651Sadrian ATH_PCU_UNLOCK(sc); 1781227651Sadrian 1782218065Sadrian return 0; 1783218065Sadrianbad2: 1784218065Sadrian ATH_TXBUF_LOCK(sc); 1785227344Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); 1786218065Sadrian ATH_TXBUF_UNLOCK(sc); 1787218065Sadrianbad: 1788227651Sadrian ATH_PCU_LOCK(sc); 1789227651Sadrian sc->sc_txstart_cnt--; 1790227651Sadrian ATH_PCU_UNLOCK(sc); 1791227651Sadrianbad0: 1792218065Sadrian ifp->if_oerrors++; 1793218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 1794218065Sadrian ieee80211_free_node(ni); 1795227651Sadrian 1796218065Sadrian return error; 1797218065Sadrian} 1798227364Sadrian 1799227364Sadrian/* Some helper functions */ 1800227364Sadrian 1801227364Sadrian/* 1802227364Sadrian * ADDBA (and potentially others) need to be placed in the same 1803227364Sadrian * hardware queue as the TID/node it's relating to. This is so 1804227364Sadrian * it goes out after any pending non-aggregate frames to the 1805227364Sadrian * same node/TID. 1806227364Sadrian * 1807227364Sadrian * If this isn't done, the ADDBA can go out before the frames 1808227364Sadrian * queued in hardware. Even though these frames have a sequence 1809227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 1810227364Sadrian * no frames whose sequence numbers are after the ADDBA should 1811227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 1812227364Sadrian * will simply drop them as being out of the BAW. 1813227364Sadrian * 1814227364Sadrian * The frames can't be appended to the TID software queue - it'll 1815227364Sadrian * never be sent out. So these frames have to be directly 1816227364Sadrian * dispatched to the hardware, rather than queued in software. 1817227364Sadrian * So if this function returns true, the TXQ has to be 1818227364Sadrian * overridden and it has to be directly dispatched. 1819227364Sadrian * 1820227364Sadrian * It's a dirty hack, but someone's gotta do it. 1821227364Sadrian */ 1822227364Sadrian 1823227364Sadrian/* 1824227364Sadrian * XXX doesn't belong here! 1825227364Sadrian */ 1826227364Sadrianstatic int 1827227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 1828227364Sadrian{ 1829227364Sadrian /* Type: Management frame? */ 1830227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 1831227364Sadrian IEEE80211_FC0_TYPE_MGT) 1832227364Sadrian return 0; 1833227364Sadrian 1834227364Sadrian /* Subtype: Action frame? */ 1835227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 1836227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 1837227364Sadrian return 0; 1838227364Sadrian 1839227364Sadrian return 1; 1840227364Sadrian} 1841227364Sadrian 1842227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1843227364Sadrian/* 1844227364Sadrian * Return an alternate TID for ADDBA request frames. 1845227364Sadrian * 1846227364Sadrian * Yes, this likely should be done in the net80211 layer. 1847227364Sadrian */ 1848227364Sadrianstatic int 1849227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 1850227364Sadrian struct ieee80211_node *ni, 1851227364Sadrian struct mbuf *m0, int *tid) 1852227364Sadrian{ 1853227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 1854227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 1855227364Sadrian uint8_t *frm; 1856227364Sadrian uint16_t baparamset; 1857227364Sadrian 1858227364Sadrian /* Not action frame? Bail */ 1859227364Sadrian if (! ieee80211_is_action(wh)) 1860227364Sadrian return 0; 1861227364Sadrian 1862227364Sadrian /* XXX Not needed for frames we send? */ 1863227364Sadrian#if 0 1864227364Sadrian /* Correct length? */ 1865227364Sadrian if (! ieee80211_parse_action(ni, m)) 1866227364Sadrian return 0; 1867227364Sadrian#endif 1868227364Sadrian 1869227364Sadrian /* Extract out action frame */ 1870227364Sadrian frm = (u_int8_t *)&wh[1]; 1871227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 1872227364Sadrian 1873227364Sadrian /* Not ADDBA? Bail */ 1874227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 1875227364Sadrian return 0; 1876227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 1877227364Sadrian return 0; 1878227364Sadrian 1879227364Sadrian /* Extract TID, return it */ 1880227364Sadrian baparamset = le16toh(ia->rq_baparamset); 1881227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 1882227364Sadrian 1883227364Sadrian return 1; 1884227364Sadrian} 1885227364Sadrian#undef MS 1886227364Sadrian 1887227364Sadrian/* Per-node software queue operations */ 1888227364Sadrian 1889227364Sadrian/* 1890227364Sadrian * Add the current packet to the given BAW. 1891227364Sadrian * It is assumed that the current packet 1892227364Sadrian * 1893227364Sadrian * + fits inside the BAW; 1894227364Sadrian * + already has had a sequence number allocated. 1895227364Sadrian * 1896227364Sadrian * Since the BAW status may be modified by both the ath task and 1897227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 1898227364Sadrian */ 1899227364Sadrianvoid 1900227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 1901227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 1902227364Sadrian{ 1903227364Sadrian int index, cindex; 1904227364Sadrian struct ieee80211_tx_ampdu *tap; 1905227364Sadrian 1906227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 1907227364Sadrian 1908227364Sadrian if (bf->bf_state.bfs_isretried) 1909227364Sadrian return; 1910227364Sadrian 1911227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 1912227364Sadrian 1913227364Sadrian if (bf->bf_state.bfs_addedbaw) 1914227364Sadrian device_printf(sc->sc_dev, 1915229949Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 1916229949Sadrian "baw head=%d tail=%d\n", 1917227364Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 1918229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 1919229949Sadrian tid->baw_tail); 1920227364Sadrian 1921227364Sadrian /* 1922227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 1923227364Sadrian * the txa state contains the current baw start. 1924227364Sadrian */ 1925227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 1926227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 1927227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 1928229949Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 1929229949Sadrian "baw head=%d tail=%d\n", 1930227364Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 1931229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 1932229949Sadrian tid->baw_tail); 1933227364Sadrian 1934227364Sadrian 1935227364Sadrian#if 0 1936227364Sadrian assert(tid->tx_buf[cindex] == NULL); 1937227364Sadrian#endif 1938227364Sadrian if (tid->tx_buf[cindex] != NULL) { 1939227364Sadrian device_printf(sc->sc_dev, 1940227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 1941227364Sadrian "head=%d, tail=%d)\n", 1942227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 1943227364Sadrian device_printf(sc->sc_dev, 1944227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 1945227364Sadrian __func__, 1946227364Sadrian tid->tx_buf[cindex], 1947227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 1948227364Sadrian bf, 1949227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 1950227364Sadrian ); 1951227364Sadrian } 1952227364Sadrian tid->tx_buf[cindex] = bf; 1953227364Sadrian 1954229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 1955229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 1956227364Sadrian tid->baw_tail = cindex; 1957227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 1958227364Sadrian } 1959227364Sadrian} 1960227364Sadrian 1961227364Sadrian/* 1962227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 1963227398Sadrian * 1964227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 1965227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 1966227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 1967227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 1968227398Sadrian * tracking array to maintain consistency. 1969227398Sadrian */ 1970227398Sadrianstatic void 1971227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 1972227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 1973227398Sadrian{ 1974227398Sadrian int index, cindex; 1975227398Sadrian struct ieee80211_tx_ampdu *tap; 1976227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 1977227398Sadrian 1978227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 1979227398Sadrian 1980227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 1981227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 1982227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 1983227398Sadrian 1984227398Sadrian /* 1985227398Sadrian * Just warn for now; if it happens then we should find out 1986227398Sadrian * about it. It's highly likely the aggregation session will 1987227398Sadrian * soon hang. 1988227398Sadrian */ 1989227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 1990227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 1991227398Sadrian " has mismatching seqno's, BA session may hang.\n", 1992227398Sadrian __func__); 1993227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 1994227398Sadrian __func__, 1995227398Sadrian old_bf->bf_state.bfs_seqno, 1996227398Sadrian new_bf->bf_state.bfs_seqno); 1997227398Sadrian } 1998227398Sadrian 1999227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2000227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2001227398Sadrian " has m BA session may hang.\n", 2002227398Sadrian __func__); 2003227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2004227398Sadrian __func__, 2005227398Sadrian old_bf, new_bf); 2006227398Sadrian } 2007227398Sadrian 2008227398Sadrian tid->tx_buf[cindex] = new_bf; 2009227398Sadrian} 2010227398Sadrian 2011227398Sadrian/* 2012227364Sadrian * seq_start - left edge of BAW 2013227364Sadrian * seq_next - current/next sequence number to allocate 2014227364Sadrian * 2015227364Sadrian * Since the BAW status may be modified by both the ath task and 2016227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2017227364Sadrian */ 2018227364Sadrianstatic void 2019227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2020227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2021227364Sadrian{ 2022227364Sadrian int index, cindex; 2023227364Sadrian struct ieee80211_tx_ampdu *tap; 2024227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2025227364Sadrian 2026227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2027227364Sadrian 2028227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2029227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2030227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2031227364Sadrian 2032227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2033229949Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2034229949Sadrian "baw head=%d, tail=%d\n", 2035227364Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2036227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2037227364Sadrian 2038227364Sadrian /* 2039227364Sadrian * If this occurs then we have a big problem - something else 2040227364Sadrian * has slid tap->txa_start along without updating the BAW 2041227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2042227364Sadrian * completely busted. 2043227364Sadrian * 2044227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2045227364Sadrian * it's quite possible that a cloned buffer is making its way 2046227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2047227364Sadrian */ 2048227364Sadrian if (tid->tx_buf[cindex] != bf) { 2049227364Sadrian device_printf(sc->sc_dev, 2050227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2051227364Sadrian __func__, 2052227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2053227364Sadrian tid->tx_buf[cindex], 2054227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2055227364Sadrian } 2056227364Sadrian 2057227364Sadrian tid->tx_buf[cindex] = NULL; 2058227364Sadrian 2059229949Sadrian while (tid->baw_head != tid->baw_tail && 2060229949Sadrian !tid->tx_buf[tid->baw_head]) { 2061227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2062227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2063227364Sadrian } 2064229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2065229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2066227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2067227364Sadrian} 2068227364Sadrian 2069227364Sadrian/* 2070227364Sadrian * Mark the current node/TID as ready to TX. 2071227364Sadrian * 2072227364Sadrian * This is done to make it easy for the software scheduler to 2073227364Sadrian * find which nodes have data to send. 2074227364Sadrian * 2075227364Sadrian * The TXQ lock must be held. 2076227364Sadrian */ 2077227364Sadrianstatic void 2078227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2079227364Sadrian{ 2080227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2081227364Sadrian 2082227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2083227364Sadrian 2084227364Sadrian if (tid->paused) 2085227364Sadrian return; /* paused, can't schedule yet */ 2086227364Sadrian 2087227364Sadrian if (tid->sched) 2088227364Sadrian return; /* already scheduled */ 2089227364Sadrian 2090227364Sadrian tid->sched = 1; 2091227364Sadrian 2092227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2093227364Sadrian} 2094227364Sadrian 2095227364Sadrian/* 2096227364Sadrian * Mark the current node as no longer needing to be polled for 2097227364Sadrian * TX packets. 2098227364Sadrian * 2099227364Sadrian * The TXQ lock must be held. 2100227364Sadrian */ 2101227364Sadrianstatic void 2102227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2103227364Sadrian{ 2104227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2105227364Sadrian 2106227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2107227364Sadrian 2108227364Sadrian if (tid->sched == 0) 2109227364Sadrian return; 2110227364Sadrian 2111227364Sadrian tid->sched = 0; 2112227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2113227364Sadrian} 2114227364Sadrian 2115227364Sadrian/* 2116227364Sadrian * Assign a sequence number manually to the given frame. 2117227364Sadrian * 2118227364Sadrian * This should only be called for A-MPDU TX frames. 2119227364Sadrian */ 2120227364Sadrianstatic ieee80211_seq 2121227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2122227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2123227364Sadrian{ 2124227364Sadrian struct ieee80211_frame *wh; 2125227364Sadrian int tid, pri; 2126227364Sadrian ieee80211_seq seqno; 2127227364Sadrian uint8_t subtype; 2128227364Sadrian 2129227364Sadrian /* TID lookup */ 2130227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2131227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2132227364Sadrian tid = WME_AC_TO_TID(pri); 2133227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2134227364Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2135227364Sadrian 2136227364Sadrian /* XXX Is it a control frame? Ignore */ 2137227364Sadrian 2138227364Sadrian /* Does the packet require a sequence number? */ 2139227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2140227364Sadrian return -1; 2141227364Sadrian 2142227364Sadrian /* 2143227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2144227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2145227364Sadrian * 2146227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2147227364Sadrian * data frame sequence number in the aggregation state updates, so 2148227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2149227364Sadrian * RX side. 2150227364Sadrian */ 2151227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2152227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2153227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2154227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2155227364Sadrian } else { 2156227364Sadrian /* Manually assign sequence number */ 2157227364Sadrian seqno = ni->ni_txseqs[tid]; 2158227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2159227364Sadrian } 2160227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2161227364Sadrian M_SEQNO_SET(m0, seqno); 2162227364Sadrian 2163227364Sadrian /* Return so caller can do something with it if needed */ 2164227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2165227364Sadrian return seqno; 2166227364Sadrian} 2167227364Sadrian 2168227364Sadrian/* 2169227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2170227364Sadrian * If the frame is out of BAW, queue. 2171227364Sadrian * Otherwise, schedule it as a single frame. 2172227364Sadrian */ 2173227364Sadrianstatic void 2174227364Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, struct ath_buf *bf) 2175227364Sadrian{ 2176227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2177227364Sadrian struct ath_txq *txq = bf->bf_state.bfs_txq; 2178227364Sadrian struct ieee80211_tx_ampdu *tap; 2179227364Sadrian 2180227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2181227364Sadrian 2182227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2183227364Sadrian 2184227364Sadrian /* paused? queue */ 2185227364Sadrian if (tid->paused) { 2186227364Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2187227364Sadrian return; 2188227364Sadrian } 2189227364Sadrian 2190227364Sadrian /* outside baw? queue */ 2191227364Sadrian if (bf->bf_state.bfs_dobaw && 2192227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2193227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2194227364Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2195227364Sadrian ath_tx_tid_sched(sc, tid); 2196227364Sadrian return; 2197227364Sadrian } 2198227364Sadrian 2199227364Sadrian /* Direct dispatch to hardware */ 2200227364Sadrian ath_tx_do_ratelookup(sc, bf); 2201227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2202227364Sadrian ath_tx_set_rtscts(sc, bf); 2203227364Sadrian ath_tx_setds(sc, bf); 2204227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 2205227364Sadrian ath_tx_chaindesclist(sc, bf); 2206227364Sadrian 2207227364Sadrian /* Statistics */ 2208227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2209227364Sadrian 2210227364Sadrian /* Track per-TID hardware queue depth correctly */ 2211227364Sadrian tid->hwq_depth++; 2212227364Sadrian 2213227364Sadrian /* Add to BAW */ 2214227364Sadrian if (bf->bf_state.bfs_dobaw) { 2215227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2216227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2217227364Sadrian } 2218227364Sadrian 2219227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2220227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2221227364Sadrian 2222227364Sadrian /* Hand off to hardware */ 2223227364Sadrian ath_tx_handoff(sc, txq, bf); 2224227364Sadrian} 2225227364Sadrian 2226227364Sadrian/* 2227227364Sadrian * Attempt to send the packet. 2228227364Sadrian * If the queue isn't busy, direct-dispatch. 2229227364Sadrian * If the queue is busy enough, queue the given packet on the 2230227364Sadrian * relevant software queue. 2231227364Sadrian */ 2232227364Sadrianvoid 2233227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2234227364Sadrian struct ath_buf *bf) 2235227364Sadrian{ 2236227364Sadrian struct ath_node *an = ATH_NODE(ni); 2237227364Sadrian struct ieee80211_frame *wh; 2238227364Sadrian struct ath_tid *atid; 2239227364Sadrian int pri, tid; 2240227364Sadrian struct mbuf *m0 = bf->bf_m; 2241227364Sadrian 2242227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2243227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2244227364Sadrian pri = ath_tx_getac(sc, m0); 2245227364Sadrian tid = ath_tx_gettid(sc, m0); 2246227364Sadrian atid = &an->an_tid[tid]; 2247227364Sadrian 2248227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2249227364Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2250227364Sadrian 2251227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2252227364Sadrian bf->bf_state.bfs_tid = tid; 2253227364Sadrian bf->bf_state.bfs_txq = txq; 2254227364Sadrian bf->bf_state.bfs_pri = pri; 2255227364Sadrian 2256227364Sadrian /* 2257227364Sadrian * If the hardware queue isn't busy, queue it directly. 2258227364Sadrian * If the hardware queue is busy, queue it. 2259227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2260227364Sadrian * queue it. 2261227364Sadrian */ 2262227364Sadrian ATH_TXQ_LOCK(txq); 2263227364Sadrian if (atid->paused) { 2264227364Sadrian /* TID is paused, queue */ 2265229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2266227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2267227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2268227364Sadrian /* AMPDU pending; queue */ 2269229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2270227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2271227364Sadrian /* XXX sched? */ 2272227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2273227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2274229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2275227364Sadrian ath_tx_xmit_aggr(sc, an, bf); 2276229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2277229949Sadrian "%s: xmit_aggr\n", 2278229949Sadrian __func__); 2279229949Sadrian } else { 2280229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2281229949Sadrian "%s: ampdu; swq'ing\n", 2282229949Sadrian __func__); 2283227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2284227364Sadrian ath_tx_tid_sched(sc, atid); 2285227364Sadrian } 2286227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2287227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2288229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2289227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2290227364Sadrian } else { 2291227364Sadrian /* Busy; queue */ 2292229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2293227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2294227364Sadrian ath_tx_tid_sched(sc, atid); 2295227364Sadrian } 2296227364Sadrian ATH_TXQ_UNLOCK(txq); 2297227364Sadrian} 2298227364Sadrian 2299227364Sadrian/* 2300227364Sadrian * Do the basic frame setup stuff that's required before the frame 2301227364Sadrian * is added to a software queue. 2302227364Sadrian * 2303227364Sadrian * All frames get mostly the same treatment and it's done once. 2304227364Sadrian * Retransmits fiddle with things like the rate control setup, 2305227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2306227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2307227364Sadrian * 2308227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2309227364Sadrian * m0 may not be valid. 2310227364Sadrian */ 2311227364Sadrian 2312227364Sadrian 2313227364Sadrian/* 2314227364Sadrian * Configure the per-TID node state. 2315227364Sadrian * 2316227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2317227364Sadrian * else to put it just yet. 2318227364Sadrian * 2319227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2320227364Sadrian */ 2321227364Sadrianvoid 2322227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2323227364Sadrian{ 2324227364Sadrian int i, j; 2325227364Sadrian struct ath_tid *atid; 2326227364Sadrian 2327227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2328227364Sadrian atid = &an->an_tid[i]; 2329227364Sadrian TAILQ_INIT(&atid->axq_q); 2330227364Sadrian atid->tid = i; 2331227364Sadrian atid->an = an; 2332227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2333227364Sadrian atid->tx_buf[j] = NULL; 2334227364Sadrian atid->baw_head = atid->baw_tail = 0; 2335227364Sadrian atid->paused = 0; 2336227364Sadrian atid->sched = 0; 2337227364Sadrian atid->hwq_depth = 0; 2338227364Sadrian atid->cleanup_inprogress = 0; 2339227364Sadrian if (i == IEEE80211_NONQOS_TID) 2340227364Sadrian atid->ac = WME_AC_BE; 2341227364Sadrian else 2342227364Sadrian atid->ac = TID_TO_WME_AC(i); 2343227364Sadrian } 2344227364Sadrian} 2345227364Sadrian 2346227364Sadrian/* 2347227364Sadrian * Pause the current TID. This stops packets from being transmitted 2348227364Sadrian * on it. 2349227364Sadrian * 2350227364Sadrian * Since this is also called from upper layers as well as the driver, 2351227364Sadrian * it will get the TID lock. 2352227364Sadrian */ 2353227364Sadrianstatic void 2354227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2355227364Sadrian{ 2356227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2357227364Sadrian tid->paused++; 2358227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2359227364Sadrian __func__, tid->paused); 2360227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2361227364Sadrian} 2362227364Sadrian 2363227364Sadrian/* 2364227364Sadrian * Unpause the current TID, and schedule it if needed. 2365227364Sadrian */ 2366227364Sadrianstatic void 2367227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2368227364Sadrian{ 2369227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2370227364Sadrian 2371227364Sadrian tid->paused--; 2372227364Sadrian 2373227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2374227364Sadrian __func__, tid->paused); 2375227364Sadrian 2376227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2377227364Sadrian return; 2378227364Sadrian } 2379227364Sadrian 2380227364Sadrian ath_tx_tid_sched(sc, tid); 2381227364Sadrian /* Punt some frames to the hardware if needed */ 2382227364Sadrian ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2383227364Sadrian} 2384227364Sadrian 2385227364Sadrian/* 2386227364Sadrian * Free any packets currently pending in the software TX queue. 2387227364Sadrian * 2388227364Sadrian * This will be called when a node is being deleted. 2389227364Sadrian * 2390227364Sadrian * It can also be called on an active node during an interface 2391227364Sadrian * reset or state transition. 2392227364Sadrian * 2393227364Sadrian * (From Linux/reference): 2394227364Sadrian * 2395227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2396227364Sadrian * sequence number(s) without setting the retry bit. The 2397227364Sadrian * alternative is to give up on these and BAR the receiver's window 2398227364Sadrian * forward. 2399227364Sadrian */ 2400227364Sadrianstatic void 2401229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 2402229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 2403227364Sadrian{ 2404227364Sadrian struct ath_buf *bf; 2405227364Sadrian struct ieee80211_tx_ampdu *tap; 2406227364Sadrian struct ieee80211_node *ni = &an->an_node; 2407227364Sadrian int t = 0; 2408227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2409227364Sadrian 2410227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2411227364Sadrian 2412227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2413227364Sadrian 2414227364Sadrian /* Walk the queue, free frames */ 2415227364Sadrian for (;;) { 2416227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2417227364Sadrian if (bf == NULL) { 2418227364Sadrian break; 2419227364Sadrian } 2420227364Sadrian 2421227364Sadrian if (t == 0) { 2422227364Sadrian device_printf(sc->sc_dev, 2423227364Sadrian "%s: node %p: tid %d: txq_depth=%d, " 2424227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2425229949Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, " 2426229949Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 2427227364Sadrian __func__, ni, tid->tid, txq->axq_depth, 2428227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2429227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2430227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2431227364Sadrian ni->ni_txseqs[tid->tid]); 2432229165Sadrian 2433229165Sadrian /* XXX Dump the frame, see what it is? */ 2434229165Sadrian ieee80211_dump_pkt(ni->ni_ic, 2435229165Sadrian mtod(bf->bf_m, const uint8_t *), 2436229165Sadrian bf->bf_m->m_len, 0, -1); 2437229165Sadrian 2438227364Sadrian t = 1; 2439227364Sadrian } 2440227364Sadrian 2441227364Sadrian 2442227364Sadrian /* 2443227364Sadrian * If the current TID is running AMPDU, update 2444227364Sadrian * the BAW. 2445227364Sadrian */ 2446227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 2447227364Sadrian bf->bf_state.bfs_dobaw) { 2448227364Sadrian /* 2449227364Sadrian * Only remove the frame from the BAW if it's 2450227364Sadrian * been transmitted at least once; this means 2451227364Sadrian * the frame was in the BAW to begin with. 2452227364Sadrian */ 2453227364Sadrian if (bf->bf_state.bfs_retries > 0) { 2454227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 2455227364Sadrian bf->bf_state.bfs_dobaw = 0; 2456227364Sadrian } 2457227364Sadrian /* 2458227364Sadrian * This has become a non-fatal error now 2459227364Sadrian */ 2460227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2461227364Sadrian device_printf(sc->sc_dev, 2462227364Sadrian "%s: wasn't added: seqno %d\n", 2463227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2464227364Sadrian } 2465227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 2466227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 2467227364Sadrian } 2468227364Sadrian 2469227364Sadrian /* 2470227364Sadrian * Now that it's completed, grab the TID lock and update 2471227364Sadrian * the sequence number and BAW window. 2472227364Sadrian * Because sequence numbers have been assigned to frames 2473227364Sadrian * that haven't been sent yet, it's entirely possible 2474227364Sadrian * we'll be called with some pending frames that have not 2475227364Sadrian * been transmitted. 2476227364Sadrian * 2477227364Sadrian * The cleaner solution is to do the sequence number allocation 2478227364Sadrian * when the packet is first transmitted - and thus the "retries" 2479227364Sadrian * check above would be enough to update the BAW/seqno. 2480227364Sadrian */ 2481227364Sadrian 2482227364Sadrian /* But don't do it for non-QoS TIDs */ 2483227364Sadrian if (tap) { 2484227364Sadrian#if 0 2485227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2486227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 2487227364Sadrian __func__, an, tid->tid, tap->txa_start); 2488227364Sadrian#endif 2489227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 2490227364Sadrian tid->baw_tail = tid->baw_head; 2491227364Sadrian } 2492227364Sadrian} 2493227364Sadrian 2494227364Sadrian/* 2495227364Sadrian * Flush all software queued packets for the given node. 2496227364Sadrian * 2497227364Sadrian * This occurs when a completion handler frees the last buffer 2498227364Sadrian * for a node, and the node is thus freed. This causes the node 2499227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 2500227364Sadrian */ 2501227364Sadrianvoid 2502227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 2503227364Sadrian{ 2504227364Sadrian int tid; 2505227364Sadrian ath_bufhead bf_cq; 2506227364Sadrian struct ath_buf *bf; 2507227364Sadrian 2508227364Sadrian TAILQ_INIT(&bf_cq); 2509227364Sadrian 2510227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 2511227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2512227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 2513227364Sadrian 2514227364Sadrian /* Remove this tid from the list of active tids */ 2515227364Sadrian ATH_TXQ_LOCK(txq); 2516227364Sadrian ath_tx_tid_unsched(sc, atid); 2517227364Sadrian 2518227364Sadrian /* Free packets */ 2519227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 2520227364Sadrian ATH_TXQ_UNLOCK(txq); 2521227364Sadrian } 2522227364Sadrian 2523227364Sadrian /* Handle completed frames */ 2524227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2525227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2526227364Sadrian ath_tx_default_comp(sc, bf, 0); 2527227364Sadrian } 2528227364Sadrian} 2529227364Sadrian 2530227364Sadrian/* 2531227364Sadrian * Drain all the software TXQs currently with traffic queued. 2532227364Sadrian */ 2533227364Sadrianvoid 2534227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 2535227364Sadrian{ 2536227364Sadrian struct ath_tid *tid; 2537227364Sadrian ath_bufhead bf_cq; 2538227364Sadrian struct ath_buf *bf; 2539227364Sadrian 2540227364Sadrian TAILQ_INIT(&bf_cq); 2541227364Sadrian ATH_TXQ_LOCK(txq); 2542227364Sadrian 2543227364Sadrian /* 2544227364Sadrian * Iterate over all active tids for the given txq, 2545227364Sadrian * flushing and unsched'ing them 2546227364Sadrian */ 2547227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 2548227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 2549227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 2550227364Sadrian ath_tx_tid_unsched(sc, tid); 2551227364Sadrian } 2552227364Sadrian 2553227364Sadrian ATH_TXQ_UNLOCK(txq); 2554227364Sadrian 2555227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2556227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2557227364Sadrian ath_tx_default_comp(sc, bf, 0); 2558227364Sadrian } 2559227364Sadrian} 2560227364Sadrian 2561227364Sadrian/* 2562227364Sadrian * Handle completion of non-aggregate session frames. 2563227364Sadrian */ 2564227364Sadrianvoid 2565227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 2566227364Sadrian{ 2567227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2568227364Sadrian struct ath_node *an = ATH_NODE(ni); 2569227364Sadrian int tid = bf->bf_state.bfs_tid; 2570227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2571227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 2572227364Sadrian 2573227364Sadrian /* The TID state is protected behind the TXQ lock */ 2574227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2575227364Sadrian 2576227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 2577227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 2578227364Sadrian 2579227364Sadrian atid->hwq_depth--; 2580227364Sadrian if (atid->hwq_depth < 0) 2581227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 2582227364Sadrian __func__, atid->hwq_depth); 2583227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2584227364Sadrian 2585227364Sadrian /* 2586227364Sadrian * punt to rate control if we're not being cleaned up 2587227364Sadrian * during a hw queue drain and the frame wanted an ACK. 2588227364Sadrian */ 2589227364Sadrian if (fail == 0 && ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0)) 2590227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 2591227364Sadrian ts, bf->bf_state.bfs_pktlen, 2592227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 2593227364Sadrian 2594227364Sadrian ath_tx_default_comp(sc, bf, fail); 2595227364Sadrian} 2596227364Sadrian 2597227364Sadrian/* 2598227364Sadrian * Handle cleanup of aggregate session packets that aren't 2599227364Sadrian * an A-MPDU. 2600227364Sadrian * 2601227364Sadrian * There's no need to update the BAW here - the session is being 2602227364Sadrian * torn down. 2603227364Sadrian */ 2604227364Sadrianstatic void 2605227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2606227364Sadrian{ 2607227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2608227364Sadrian struct ath_node *an = ATH_NODE(ni); 2609227364Sadrian int tid = bf->bf_state.bfs_tid; 2610227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2611227364Sadrian 2612227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 2613227364Sadrian __func__, tid, atid->incomp); 2614227364Sadrian 2615227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2616227364Sadrian atid->incomp--; 2617227364Sadrian if (atid->incomp == 0) { 2618227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2619227364Sadrian "%s: TID %d: cleaned up! resume!\n", 2620227364Sadrian __func__, tid); 2621227364Sadrian atid->cleanup_inprogress = 0; 2622227364Sadrian ath_tx_tid_resume(sc, atid); 2623227364Sadrian } 2624227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2625227364Sadrian 2626227364Sadrian ath_tx_default_comp(sc, bf, 0); 2627227364Sadrian} 2628227364Sadrian 2629227364Sadrian/* 2630227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 2631227364Sadrian * unaggregated. 2632227364Sadrian * 2633227364Sadrian * - Discard all retry frames from the s/w queue. 2634227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 2635227364Sadrian * - Count the number of unacked frames, and let transmit completion 2636227364Sadrian * handle it later. 2637227364Sadrian * 2638227364Sadrian * The caller is responsible for pausing the TID. 2639227364Sadrian */ 2640227364Sadrianstatic void 2641227364Sadrianath_tx_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 2642227364Sadrian{ 2643227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2644227364Sadrian struct ieee80211_tx_ampdu *tap; 2645227364Sadrian struct ath_buf *bf, *bf_next; 2646227364Sadrian ath_bufhead bf_cq; 2647227364Sadrian 2648227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2649227364Sadrian "%s: TID %d: called\n", __func__, tid); 2650227364Sadrian 2651227364Sadrian TAILQ_INIT(&bf_cq); 2652227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2653227364Sadrian 2654227364Sadrian /* 2655227364Sadrian * Update the frames in the software TX queue: 2656227364Sadrian * 2657227364Sadrian * + Discard retry frames in the queue 2658227364Sadrian * + Fix the completion function to be non-aggregate 2659227364Sadrian */ 2660227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2661227364Sadrian while (bf) { 2662227364Sadrian if (bf->bf_state.bfs_isretried) { 2663227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 2664227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 2665227364Sadrian atid->axq_depth--; 2666227364Sadrian if (bf->bf_state.bfs_dobaw) { 2667227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2668227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2669227364Sadrian device_printf(sc->sc_dev, 2670227364Sadrian "%s: wasn't added: seqno %d\n", 2671229949Sadrian __func__, 2672229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 2673227364Sadrian } 2674227364Sadrian bf->bf_state.bfs_dobaw = 0; 2675227364Sadrian /* 2676227364Sadrian * Call the default completion handler with "fail" just 2677227364Sadrian * so upper levels are suitably notified about this. 2678227364Sadrian */ 2679227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 2680227364Sadrian bf = bf_next; 2681227364Sadrian continue; 2682227364Sadrian } 2683227364Sadrian /* Give these the default completion handler */ 2684227364Sadrian bf->bf_comp = ath_tx_normal_comp; 2685227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 2686227364Sadrian } 2687227364Sadrian 2688227364Sadrian /* The caller is required to pause the TID */ 2689227364Sadrian#if 0 2690227364Sadrian /* Pause the TID */ 2691227364Sadrian ath_tx_tid_pause(sc, atid); 2692227364Sadrian#endif 2693227364Sadrian 2694227364Sadrian /* 2695227364Sadrian * Calculate what hardware-queued frames exist based 2696227364Sadrian * on the current BAW size. Ie, what frames have been 2697227364Sadrian * added to the TX hardware queue for this TID but 2698227364Sadrian * not yet ACKed. 2699227364Sadrian */ 2700227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 2701227364Sadrian /* Need the lock - fiddling with BAW */ 2702227364Sadrian while (atid->baw_head != atid->baw_tail) { 2703227364Sadrian if (atid->tx_buf[atid->baw_head]) { 2704227364Sadrian atid->incomp++; 2705227364Sadrian atid->cleanup_inprogress = 1; 2706227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 2707227364Sadrian } 2708227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 2709227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2710227364Sadrian } 2711227364Sadrian 2712227364Sadrian /* 2713227364Sadrian * If cleanup is required, defer TID scheduling 2714227364Sadrian * until all the HW queued packets have been 2715227364Sadrian * sent. 2716227364Sadrian */ 2717227364Sadrian if (! atid->cleanup_inprogress) 2718227364Sadrian ath_tx_tid_resume(sc, atid); 2719227364Sadrian 2720227364Sadrian if (atid->cleanup_inprogress) 2721227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2722227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 2723227364Sadrian __func__, tid, atid->incomp); 2724227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2725227364Sadrian 2726227364Sadrian /* Handle completing frames and fail them */ 2727227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2728227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2729227364Sadrian ath_tx_default_comp(sc, bf, 1); 2730227364Sadrian } 2731227364Sadrian} 2732227364Sadrian 2733227364Sadrianstatic void 2734227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 2735227364Sadrian{ 2736227364Sadrian struct ieee80211_frame *wh; 2737227364Sadrian 2738227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 2739227364Sadrian /* Only update/resync if needed */ 2740227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 2741227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 2742227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 2743227364Sadrian BUS_DMASYNC_PREWRITE); 2744227364Sadrian } 2745227364Sadrian sc->sc_stats.ast_tx_swretries++; 2746227364Sadrian bf->bf_state.bfs_isretried = 1; 2747227364Sadrian bf->bf_state.bfs_retries ++; 2748227364Sadrian} 2749227364Sadrian 2750227364Sadrianstatic struct ath_buf * 2751227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 2752227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 2753227364Sadrian{ 2754227364Sadrian struct ath_buf *nbf; 2755227364Sadrian int error; 2756227364Sadrian 2757227364Sadrian nbf = ath_buf_clone(sc, bf); 2758227364Sadrian 2759227364Sadrian#if 0 2760227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 2761227364Sadrian __func__); 2762227364Sadrian#endif 2763227364Sadrian 2764227364Sadrian if (nbf == NULL) { 2765227364Sadrian /* Failed to clone */ 2766227364Sadrian device_printf(sc->sc_dev, 2767227364Sadrian "%s: failed to clone a busy buffer\n", 2768227364Sadrian __func__); 2769227364Sadrian return NULL; 2770227364Sadrian } 2771227364Sadrian 2772227364Sadrian /* Setup the dma for the new buffer */ 2773227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 2774227364Sadrian if (error != 0) { 2775227364Sadrian device_printf(sc->sc_dev, 2776227364Sadrian "%s: failed to setup dma for clone\n", 2777227364Sadrian __func__); 2778227364Sadrian /* 2779227364Sadrian * Put this at the head of the list, not tail; 2780227364Sadrian * that way it doesn't interfere with the 2781227364Sadrian * busy buffer logic (which uses the tail of 2782227364Sadrian * the list.) 2783227364Sadrian */ 2784227364Sadrian ATH_TXBUF_LOCK(sc); 2785227364Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, nbf, bf_list); 2786227364Sadrian ATH_TXBUF_UNLOCK(sc); 2787227364Sadrian return NULL; 2788227364Sadrian } 2789227364Sadrian 2790227398Sadrian /* Update BAW if required, before we free the original buf */ 2791227398Sadrian if (bf->bf_state.bfs_dobaw) 2792227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 2793227398Sadrian 2794227364Sadrian /* Free current buffer; return the older buffer */ 2795227364Sadrian bf->bf_m = NULL; 2796227364Sadrian bf->bf_node = NULL; 2797227364Sadrian ath_freebuf(sc, bf); 2798227364Sadrian return nbf; 2799227364Sadrian} 2800227364Sadrian 2801227364Sadrian/* 2802227364Sadrian * Handle retrying an unaggregate frame in an aggregate 2803227364Sadrian * session. 2804227364Sadrian * 2805227364Sadrian * If too many retries occur, pause the TID, wait for 2806227364Sadrian * any further retransmits (as there's no reason why 2807227364Sadrian * non-aggregate frames in an aggregate session are 2808227364Sadrian * transmitted in-order; they just have to be in-BAW) 2809227364Sadrian * and then queue a BAR. 2810227364Sadrian */ 2811227364Sadrianstatic void 2812227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2813227364Sadrian{ 2814227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2815227364Sadrian struct ath_node *an = ATH_NODE(ni); 2816227364Sadrian int tid = bf->bf_state.bfs_tid; 2817227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2818227364Sadrian struct ieee80211_tx_ampdu *tap; 2819227364Sadrian int txseq; 2820227364Sadrian 2821227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2822227364Sadrian 2823227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 2824227364Sadrian 2825227364Sadrian /* 2826227364Sadrian * If the buffer is marked as busy, we can't directly 2827227364Sadrian * reuse it. Instead, try to clone the buffer. 2828227364Sadrian * If the clone is successful, recycle the old buffer. 2829227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 2830227364Sadrian * to force the next bit of code to free the buffer 2831227364Sadrian * for us. 2832227364Sadrian */ 2833227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 2834227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 2835227364Sadrian struct ath_buf *nbf; 2836227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 2837227364Sadrian if (nbf) 2838227364Sadrian /* bf has been freed at this point */ 2839227364Sadrian bf = nbf; 2840227364Sadrian else 2841227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 2842227364Sadrian } 2843227364Sadrian 2844227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 2845227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 2846227364Sadrian "%s: exceeded retries; seqno %d\n", 2847227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2848227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 2849227364Sadrian 2850227364Sadrian /* Update BAW anyway */ 2851227364Sadrian if (bf->bf_state.bfs_dobaw) { 2852227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2853227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2854227364Sadrian device_printf(sc->sc_dev, 2855227364Sadrian "%s: wasn't added: seqno %d\n", 2856227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2857227364Sadrian } 2858227364Sadrian bf->bf_state.bfs_dobaw = 0; 2859227364Sadrian 2860227364Sadrian /* Send BAR frame */ 2861227364Sadrian /* 2862227364Sadrian * This'll end up going into net80211 and back out 2863227364Sadrian * again, via ic->ic_raw_xmit(). 2864227364Sadrian */ 2865227364Sadrian txseq = tap->txa_start; 2866227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2867227364Sadrian 2868227364Sadrian device_printf(sc->sc_dev, 2869227364Sadrian "%s: TID %d: send BAR; seq %d\n", __func__, tid, txseq); 2870227364Sadrian 2871227364Sadrian /* XXX TODO: send BAR */ 2872227364Sadrian 2873227364Sadrian /* Free buffer, bf is free after this call */ 2874227364Sadrian ath_tx_default_comp(sc, bf, 0); 2875227364Sadrian return; 2876227364Sadrian } 2877227364Sadrian 2878227364Sadrian /* 2879227364Sadrian * This increments the retry counter as well as 2880227364Sadrian * sets the retry flag in the ath_buf and packet 2881227364Sadrian * body. 2882227364Sadrian */ 2883227364Sadrian ath_tx_set_retry(sc, bf); 2884227364Sadrian 2885227364Sadrian /* 2886227364Sadrian * Insert this at the head of the queue, so it's 2887227364Sadrian * retried before any current/subsequent frames. 2888227364Sadrian */ 2889227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 2890227364Sadrian ath_tx_tid_sched(sc, atid); 2891227364Sadrian 2892227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2893227364Sadrian} 2894227364Sadrian 2895227364Sadrian/* 2896227364Sadrian * Common code for aggregate excessive retry/subframe retry. 2897227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 2898227364Sadrian * buffers. 2899227364Sadrian * 2900227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 2901227364Sadrian */ 2902227364Sadrianstatic int 2903227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 2904227364Sadrian ath_bufhead *bf_q) 2905227364Sadrian{ 2906227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2907227364Sadrian struct ath_node *an = ATH_NODE(ni); 2908227364Sadrian int tid = bf->bf_state.bfs_tid; 2909227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2910227364Sadrian 2911227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 2912227364Sadrian 2913227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 2914227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 2915227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 2916227364Sadrian 2917227364Sadrian /* 2918227364Sadrian * If the buffer is marked as busy, we can't directly 2919227364Sadrian * reuse it. Instead, try to clone the buffer. 2920227364Sadrian * If the clone is successful, recycle the old buffer. 2921227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 2922227364Sadrian * to force the next bit of code to free the buffer 2923227364Sadrian * for us. 2924227364Sadrian */ 2925227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 2926227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 2927227364Sadrian struct ath_buf *nbf; 2928227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 2929227364Sadrian if (nbf) 2930227364Sadrian /* bf has been freed at this point */ 2931227364Sadrian bf = nbf; 2932227364Sadrian else 2933227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 2934227364Sadrian } 2935227364Sadrian 2936227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 2937227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 2938227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 2939227364Sadrian "%s: max retries: seqno %d\n", 2940227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2941227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2942227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2943227364Sadrian device_printf(sc->sc_dev, 2944227364Sadrian "%s: wasn't added: seqno %d\n", 2945227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2946227364Sadrian bf->bf_state.bfs_dobaw = 0; 2947227364Sadrian return 1; 2948227364Sadrian } 2949227364Sadrian 2950227364Sadrian ath_tx_set_retry(sc, bf); 2951227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 2952227364Sadrian 2953227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 2954227364Sadrian return 0; 2955227364Sadrian} 2956227364Sadrian 2957227364Sadrian/* 2958227364Sadrian * error pkt completion for an aggregate destination 2959227364Sadrian */ 2960227364Sadrianstatic void 2961227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 2962227364Sadrian struct ath_tid *tid) 2963227364Sadrian{ 2964227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 2965227364Sadrian struct ath_node *an = ATH_NODE(ni); 2966227364Sadrian struct ath_buf *bf_next, *bf; 2967227364Sadrian ath_bufhead bf_q; 2968227364Sadrian int drops = 0; 2969227364Sadrian struct ieee80211_tx_ampdu *tap; 2970227364Sadrian ath_bufhead bf_cq; 2971227364Sadrian 2972227364Sadrian TAILQ_INIT(&bf_q); 2973227364Sadrian TAILQ_INIT(&bf_cq); 2974227364Sadrian 2975227364Sadrian /* 2976227364Sadrian * Update rate control - all frames have failed. 2977227364Sadrian * 2978227364Sadrian * XXX use the length in the first frame in the series; 2979227364Sadrian * XXX just so things are consistent for now. 2980227364Sadrian */ 2981227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 2982227364Sadrian &bf_first->bf_status.ds_txstat, 2983227364Sadrian bf_first->bf_state.bfs_pktlen, 2984227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 2985227364Sadrian 2986227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2987227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2988227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 2989227364Sadrian 2990227364Sadrian /* Retry all subframes */ 2991227364Sadrian bf = bf_first; 2992227364Sadrian while (bf) { 2993227364Sadrian bf_next = bf->bf_next; 2994227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 2995227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 2996227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 2997227364Sadrian drops++; 2998227364Sadrian bf->bf_next = NULL; 2999227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3000227364Sadrian } 3001227364Sadrian bf = bf_next; 3002227364Sadrian } 3003227364Sadrian 3004227364Sadrian /* Prepend all frames to the beginning of the queue */ 3005227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3006227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3007227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 3008227364Sadrian } 3009227364Sadrian 3010227364Sadrian ath_tx_tid_sched(sc, tid); 3011227364Sadrian 3012227364Sadrian /* 3013227364Sadrian * send bar if we dropped any frames 3014227364Sadrian * 3015227364Sadrian * Keep the txq lock held for now, as we need to ensure 3016227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 3017227364Sadrian * in the ifnet TX context or raw TX context.) 3018227364Sadrian */ 3019227364Sadrian if (drops) { 3020227364Sadrian int txseq = tap->txa_start; 3021227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3022227364Sadrian device_printf(sc->sc_dev, 3023227364Sadrian "%s: TID %d: send BAR; seq %d\n", 3024227364Sadrian __func__, tid->tid, txseq); 3025227364Sadrian 3026227364Sadrian /* XXX TODO: send BAR */ 3027227364Sadrian } else { 3028227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3029227364Sadrian } 3030227364Sadrian 3031227364Sadrian /* Complete frames which errored out */ 3032227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3033227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3034227364Sadrian ath_tx_default_comp(sc, bf, 0); 3035227364Sadrian } 3036227364Sadrian} 3037227364Sadrian 3038227364Sadrian/* 3039227364Sadrian * Handle clean-up of packets from an aggregate list. 3040227364Sadrian * 3041227364Sadrian * There's no need to update the BAW here - the session is being 3042227364Sadrian * torn down. 3043227364Sadrian */ 3044227364Sadrianstatic void 3045227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3046227364Sadrian{ 3047227364Sadrian struct ath_buf *bf, *bf_next; 3048227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3049227364Sadrian struct ath_node *an = ATH_NODE(ni); 3050227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3051227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3052227364Sadrian 3053227364Sadrian bf = bf_first; 3054227364Sadrian 3055227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3056227364Sadrian 3057227364Sadrian /* update incomp */ 3058227364Sadrian while (bf) { 3059227364Sadrian atid->incomp--; 3060227364Sadrian bf = bf->bf_next; 3061227364Sadrian } 3062227364Sadrian 3063227364Sadrian if (atid->incomp == 0) { 3064227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3065227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3066227364Sadrian __func__, tid); 3067227364Sadrian atid->cleanup_inprogress = 0; 3068227364Sadrian ath_tx_tid_resume(sc, atid); 3069227364Sadrian } 3070227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3071227364Sadrian 3072227364Sadrian /* Handle frame completion */ 3073227364Sadrian while (bf) { 3074227364Sadrian bf_next = bf->bf_next; 3075227364Sadrian ath_tx_default_comp(sc, bf, 1); 3076227364Sadrian bf = bf_next; 3077227364Sadrian } 3078227364Sadrian} 3079227364Sadrian 3080227364Sadrian/* 3081227364Sadrian * Handle completion of an set of aggregate frames. 3082227364Sadrian * 3083227364Sadrian * XXX for now, simply complete each sub-frame. 3084227364Sadrian * 3085227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3086227364Sadrian * not the last descriptor in the first frame. 3087227364Sadrian */ 3088227364Sadrianstatic void 3089229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 3090229949Sadrian int fail) 3091227364Sadrian{ 3092227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3093227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3094227364Sadrian struct ath_node *an = ATH_NODE(ni); 3095227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3096227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3097227364Sadrian struct ath_tx_status ts; 3098227364Sadrian struct ieee80211_tx_ampdu *tap; 3099227364Sadrian ath_bufhead bf_q; 3100227364Sadrian ath_bufhead bf_cq; 3101227364Sadrian int seq_st, tx_ok; 3102227364Sadrian int hasba, isaggr; 3103227364Sadrian uint32_t ba[2]; 3104227364Sadrian struct ath_buf *bf, *bf_next; 3105227364Sadrian int ba_index; 3106227364Sadrian int drops = 0; 3107227364Sadrian int nframes = 0, nbad = 0, nf; 3108227364Sadrian int pktlen; 3109227364Sadrian /* XXX there's too much on the stack? */ 3110227364Sadrian struct ath_rc_series rc[4]; 3111227364Sadrian int txseq; 3112227364Sadrian 3113227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3114227364Sadrian __func__, atid->hwq_depth); 3115227364Sadrian 3116227364Sadrian /* The TID state is kept behind the TXQ lock */ 3117227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3118227364Sadrian 3119227364Sadrian atid->hwq_depth--; 3120227364Sadrian if (atid->hwq_depth < 0) 3121227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3122227364Sadrian __func__, atid->hwq_depth); 3123227364Sadrian 3124227364Sadrian /* 3125227364Sadrian * Punt cleanup to the relevant function, not our problem now 3126227364Sadrian */ 3127227364Sadrian if (atid->cleanup_inprogress) { 3128227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3129227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3130227364Sadrian return; 3131227364Sadrian } 3132227364Sadrian 3133227364Sadrian /* 3134227364Sadrian * Take a copy; this may be needed -after- bf_first 3135227364Sadrian * has been completed and freed. 3136227364Sadrian */ 3137227364Sadrian ts = bf_first->bf_status.ds_txstat; 3138227364Sadrian /* 3139227364Sadrian * XXX for now, use the first frame in the aggregate for 3140227364Sadrian * XXX rate control completion; it's at least consistent. 3141227364Sadrian */ 3142227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3143227364Sadrian 3144227364Sadrian /* 3145227364Sadrian * handle errors first 3146227364Sadrian */ 3147227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3148227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3149227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3150227364Sadrian return; 3151227364Sadrian } 3152227364Sadrian 3153227364Sadrian TAILQ_INIT(&bf_q); 3154227364Sadrian TAILQ_INIT(&bf_cq); 3155227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3156227364Sadrian 3157227364Sadrian /* 3158227364Sadrian * extract starting sequence and block-ack bitmap 3159227364Sadrian */ 3160227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3161227364Sadrian seq_st = ts.ts_seqnum; 3162227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3163227364Sadrian tx_ok = (ts.ts_status == 0); 3164227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3165227364Sadrian ba[0] = ts.ts_ba_low; 3166227364Sadrian ba[1] = ts.ts_ba_high; 3167227364Sadrian 3168227364Sadrian /* 3169227364Sadrian * Copy the TX completion status and the rate control 3170227364Sadrian * series from the first descriptor, as it may be freed 3171227364Sadrian * before the rate control code can get its grubby fingers 3172227364Sadrian * into things. 3173227364Sadrian */ 3174227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3175227364Sadrian 3176227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3177229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 3178229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3179227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3180227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3181227364Sadrian 3182227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3183227364Sadrian if (tid != ts.ts_tid) { 3184227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3185227364Sadrian __func__, tid, ts.ts_tid); 3186227364Sadrian tx_ok = 0; 3187227364Sadrian } 3188227364Sadrian 3189227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3190227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3191227364Sadrian device_printf(sc->sc_dev, 3192229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 3193229949Sadrian "seq_st=%d\n", 3194227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3195227364Sadrian /* XXX TODO: schedule an interface reset */ 3196227364Sadrian } 3197227364Sadrian 3198227364Sadrian /* 3199227364Sadrian * Walk the list of frames, figure out which ones were correctly 3200227364Sadrian * sent and which weren't. 3201227364Sadrian */ 3202227364Sadrian bf = bf_first; 3203227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3204227364Sadrian 3205227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3206227364Sadrian bf_first = NULL; 3207227364Sadrian 3208227364Sadrian /* 3209227364Sadrian * Walk the list of completed frames and determine 3210227364Sadrian * which need to be completed and which need to be 3211227364Sadrian * retransmitted. 3212227364Sadrian * 3213227364Sadrian * For completed frames, the completion functions need 3214227364Sadrian * to be called at the end of this function as the last 3215227364Sadrian * node reference may free the node. 3216227364Sadrian * 3217227364Sadrian * Finally, since the TXQ lock can't be held during the 3218227364Sadrian * completion callback (to avoid lock recursion), 3219227364Sadrian * the completion calls have to be done outside of the 3220227364Sadrian * lock. 3221227364Sadrian */ 3222227364Sadrian while (bf) { 3223227364Sadrian nframes++; 3224229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 3225229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3226227364Sadrian bf_next = bf->bf_next; 3227227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3228227364Sadrian 3229227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3230227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3231227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3232227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3233227364Sadrian 3234227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3235227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 3236227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3237227364Sadrian bf->bf_state.bfs_dobaw = 0; 3238227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3239227364Sadrian device_printf(sc->sc_dev, 3240227364Sadrian "%s: wasn't added: seqno %d\n", 3241227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3242227364Sadrian bf->bf_next = NULL; 3243227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3244227364Sadrian } else { 3245227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3246227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3247227364Sadrian drops++; 3248227364Sadrian bf->bf_next = NULL; 3249227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3250227364Sadrian } 3251227364Sadrian nbad++; 3252227364Sadrian } 3253227364Sadrian bf = bf_next; 3254227364Sadrian } 3255227364Sadrian 3256227364Sadrian /* 3257227364Sadrian * Now that the BAW updates have been done, unlock 3258227364Sadrian * 3259227364Sadrian * txseq is grabbed before the lock is released so we 3260227364Sadrian * have a consistent view of what -was- in the BAW. 3261227364Sadrian * Anything after this point will not yet have been 3262227364Sadrian * TXed. 3263227364Sadrian */ 3264227364Sadrian txseq = tap->txa_start; 3265227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3266227364Sadrian 3267227364Sadrian if (nframes != nf) 3268227364Sadrian device_printf(sc->sc_dev, 3269227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3270227364Sadrian __func__, nframes, nf); 3271227364Sadrian 3272227364Sadrian /* 3273227364Sadrian * Now we know how many frames were bad, call the rate 3274227364Sadrian * control code. 3275227364Sadrian */ 3276227364Sadrian if (fail == 0) 3277229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 3278229949Sadrian nbad); 3279227364Sadrian 3280227364Sadrian /* 3281227364Sadrian * send bar if we dropped any frames 3282227364Sadrian */ 3283227364Sadrian if (drops) { 3284227364Sadrian device_printf(sc->sc_dev, 3285227364Sadrian "%s: TID %d: send BAR; seq %d\n", __func__, tid, txseq); 3286227364Sadrian /* XXX TODO: send BAR */ 3287227364Sadrian } 3288227364Sadrian 3289227364Sadrian /* Prepend all frames to the beginning of the queue */ 3290227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3291227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3292227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3293227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3294227364Sadrian } 3295227364Sadrian ath_tx_tid_sched(sc, atid); 3296227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3297227364Sadrian 3298227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3299227364Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3300227364Sadrian 3301227364Sadrian /* Do deferred completion */ 3302227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3303227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3304227364Sadrian ath_tx_default_comp(sc, bf, 0); 3305227364Sadrian } 3306227364Sadrian} 3307227364Sadrian 3308227364Sadrian/* 3309227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3310227364Sadrian * session. 3311227364Sadrian * 3312227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3313227364Sadrian * ath_tx_draintxq(). 3314227364Sadrian */ 3315227364Sadrianstatic void 3316227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3317227364Sadrian{ 3318227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3319227364Sadrian struct ath_node *an = ATH_NODE(ni); 3320227364Sadrian int tid = bf->bf_state.bfs_tid; 3321227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3322227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3323227364Sadrian 3324227364Sadrian /* 3325227364Sadrian * Update rate control status here, before we possibly 3326227364Sadrian * punt to retry or cleanup. 3327227364Sadrian * 3328227364Sadrian * Do it outside of the TXQ lock. 3329227364Sadrian */ 3330227364Sadrian if (fail == 0 && ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0)) 3331227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3332227364Sadrian &bf->bf_status.ds_txstat, 3333227364Sadrian bf->bf_state.bfs_pktlen, 3334227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3335227364Sadrian 3336227364Sadrian /* 3337227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3338227364Sadrian * This unfortunately means that it's released and regrabbed 3339227364Sadrian * during retry and cleanup. That's rather inefficient. 3340227364Sadrian */ 3341227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3342227364Sadrian 3343227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3344227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3345227364Sadrian 3346229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 3347229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 3348229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 3349229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3350227364Sadrian 3351227364Sadrian atid->hwq_depth--; 3352227364Sadrian if (atid->hwq_depth < 0) 3353227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3354227364Sadrian __func__, atid->hwq_depth); 3355227364Sadrian 3356227364Sadrian /* 3357227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3358227364Sadrian * rather than handling it here. It's thus their 3359227364Sadrian * responsibility to clean up, call the completion 3360227364Sadrian * function in net80211, etc. 3361227364Sadrian */ 3362227364Sadrian if (atid->cleanup_inprogress) { 3363227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3364229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 3365229949Sadrian __func__); 3366227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3367227364Sadrian return; 3368227364Sadrian } 3369227364Sadrian 3370227364Sadrian /* 3371227364Sadrian * Don't bother with the retry check if all frames 3372227364Sadrian * are being failed (eg during queue deletion.) 3373227364Sadrian */ 3374227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3375227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3376229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 3377229949Sadrian __func__); 3378227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3379227364Sadrian return; 3380227364Sadrian } 3381227364Sadrian 3382227364Sadrian /* Success? Complete */ 3383227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3384227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3385227364Sadrian if (bf->bf_state.bfs_dobaw) { 3386227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3387227364Sadrian bf->bf_state.bfs_dobaw = 0; 3388227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3389227364Sadrian device_printf(sc->sc_dev, 3390227364Sadrian "%s: wasn't added: seqno %d\n", 3391227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3392227364Sadrian } 3393227364Sadrian 3394227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3395227364Sadrian 3396227364Sadrian ath_tx_default_comp(sc, bf, fail); 3397227364Sadrian /* bf is freed at this point */ 3398227364Sadrian} 3399227364Sadrian 3400227364Sadrianvoid 3401227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3402227364Sadrian{ 3403227364Sadrian if (bf->bf_state.bfs_aggr) 3404227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 3405227364Sadrian else 3406227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 3407227364Sadrian} 3408227364Sadrian 3409227364Sadrian/* 3410227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3411227364Sadrian * 3412227364Sadrian * This is the aggregate version. 3413227364Sadrian */ 3414227364Sadrianvoid 3415227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 3416227364Sadrian struct ath_tid *tid) 3417227364Sadrian{ 3418227364Sadrian struct ath_buf *bf; 3419227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3420227364Sadrian struct ieee80211_tx_ampdu *tap; 3421227364Sadrian struct ieee80211_node *ni = &an->an_node; 3422227364Sadrian ATH_AGGR_STATUS status; 3423227364Sadrian ath_bufhead bf_q; 3424227364Sadrian 3425227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 3426227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3427227364Sadrian 3428227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3429227364Sadrian 3430227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 3431227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 3432227364Sadrian __func__); 3433227364Sadrian 3434227364Sadrian for (;;) { 3435227364Sadrian status = ATH_AGGR_DONE; 3436227364Sadrian 3437227364Sadrian /* 3438227364Sadrian * If the upper layer has paused the TID, don't 3439227364Sadrian * queue any further packets. 3440227364Sadrian * 3441227364Sadrian * This can also occur from the completion task because 3442227364Sadrian * of packet loss; but as its serialised with this code, 3443227364Sadrian * it won't "appear" half way through queuing packets. 3444227364Sadrian */ 3445227364Sadrian if (tid->paused) 3446227364Sadrian break; 3447227364Sadrian 3448227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3449227364Sadrian if (bf == NULL) { 3450227364Sadrian break; 3451227364Sadrian } 3452227364Sadrian 3453227364Sadrian /* 3454227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 3455227364Sadrian * data frame), schedule it directly; continue. 3456227364Sadrian */ 3457227364Sadrian if (! bf->bf_state.bfs_dobaw) { 3458229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3459229949Sadrian "%s: non-baw packet\n", 3460227364Sadrian __func__); 3461227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3462227364Sadrian bf->bf_state.bfs_aggr = 0; 3463227364Sadrian ath_tx_do_ratelookup(sc, bf); 3464227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3465227364Sadrian ath_tx_set_rtscts(sc, bf); 3466227364Sadrian ath_tx_setds(sc, bf); 3467227364Sadrian ath_tx_chaindesclist(sc, bf); 3468227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3469227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3470227364Sadrian 3471227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 3472227364Sadrian 3473227364Sadrian /* Queue the packet; continue */ 3474227364Sadrian goto queuepkt; 3475227364Sadrian } 3476227364Sadrian 3477227364Sadrian TAILQ_INIT(&bf_q); 3478227364Sadrian 3479227364Sadrian /* 3480227364Sadrian * Do a rate control lookup on the first frame in the 3481227364Sadrian * list. The rate control code needs that to occur 3482227364Sadrian * before it can determine whether to TX. 3483227364Sadrian * It's inaccurate because the rate control code doesn't 3484227364Sadrian * really "do" aggregate lookups, so it only considers 3485227364Sadrian * the size of the first frame. 3486227364Sadrian */ 3487227364Sadrian ath_tx_do_ratelookup(sc, bf); 3488227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 3489227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 3490227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3491227364Sadrian 3492227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 3493227364Sadrian 3494227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3495227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 3496227364Sadrian 3497227364Sadrian /* 3498227364Sadrian * No frames to be picked up - out of BAW 3499227364Sadrian */ 3500227364Sadrian if (TAILQ_EMPTY(&bf_q)) 3501227364Sadrian break; 3502227364Sadrian 3503227364Sadrian /* 3504227364Sadrian * This assumes that the descriptor list in the ath_bufhead 3505227364Sadrian * are already linked together via bf_next pointers. 3506227364Sadrian */ 3507227364Sadrian bf = TAILQ_FIRST(&bf_q); 3508227364Sadrian 3509227364Sadrian /* 3510227364Sadrian * If it's the only frame send as non-aggregate 3511227364Sadrian * assume that ath_tx_form_aggr() has checked 3512227364Sadrian * whether it's in the BAW and added it appropriately. 3513227364Sadrian */ 3514227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 3515227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3516227364Sadrian "%s: single-frame aggregate\n", __func__); 3517227364Sadrian bf->bf_state.bfs_aggr = 0; 3518227364Sadrian ath_tx_set_rtscts(sc, bf); 3519227364Sadrian ath_tx_setds(sc, bf); 3520227364Sadrian ath_tx_chaindesclist(sc, bf); 3521227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3522227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3523227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 3524227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 3525227364Sadrian else 3526227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 3527227364Sadrian } else { 3528227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3529229949Sadrian "%s: multi-frame aggregate: %d frames, " 3530229949Sadrian "length %d\n", 3531227364Sadrian __func__, bf->bf_state.bfs_nframes, 3532227364Sadrian bf->bf_state.bfs_al); 3533227364Sadrian bf->bf_state.bfs_aggr = 1; 3534227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 3535227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 3536227364Sadrian 3537227364Sadrian /* 3538227364Sadrian * Update the rate and rtscts information based on the 3539227364Sadrian * rate decision made by the rate control code; 3540227364Sadrian * the first frame in the aggregate needs it. 3541227364Sadrian */ 3542227364Sadrian ath_tx_set_rtscts(sc, bf); 3543227364Sadrian 3544227364Sadrian /* 3545227364Sadrian * Setup the relevant descriptor fields 3546227364Sadrian * for aggregation. The first descriptor 3547227364Sadrian * already points to the rest in the chain. 3548227364Sadrian */ 3549227364Sadrian ath_tx_setds_11n(sc, bf); 3550227364Sadrian 3551227364Sadrian /* 3552227364Sadrian * setup first desc with rate and aggr info 3553227364Sadrian */ 3554227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3555227364Sadrian } 3556227364Sadrian queuepkt: 3557227364Sadrian //txq = bf->bf_state.bfs_txq; 3558227364Sadrian 3559227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 3560227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 3561227364Sadrian 3562227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 3563227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 3564227364Sadrian 3565227364Sadrian /* Punt to txq */ 3566227364Sadrian ath_tx_handoff(sc, txq, bf); 3567227364Sadrian 3568227364Sadrian /* Track outstanding buffer count to hardware */ 3569227364Sadrian /* aggregates are "one" buffer */ 3570227364Sadrian tid->hwq_depth++; 3571227364Sadrian 3572227364Sadrian /* 3573227364Sadrian * Break out if ath_tx_form_aggr() indicated 3574227364Sadrian * there can't be any further progress (eg BAW is full.) 3575227364Sadrian * Checking for an empty txq is done above. 3576227364Sadrian * 3577227364Sadrian * XXX locking on txq here? 3578227364Sadrian */ 3579227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 3580227364Sadrian status == ATH_AGGR_BAW_CLOSED) 3581227364Sadrian break; 3582227364Sadrian } 3583227364Sadrian} 3584227364Sadrian 3585227364Sadrian/* 3586227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3587227364Sadrian */ 3588227364Sadrianvoid 3589227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 3590227364Sadrian struct ath_tid *tid) 3591227364Sadrian{ 3592227364Sadrian struct ath_buf *bf; 3593227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3594227364Sadrian struct ieee80211_node *ni = &an->an_node; 3595227364Sadrian 3596227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 3597227364Sadrian __func__, an, tid->tid); 3598227364Sadrian 3599227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3600227364Sadrian 3601227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 3602227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 3603227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 3604227364Sadrian __func__, tid->tid); 3605227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 3606227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 3607227364Sadrian __func__, tid->tid); 3608227364Sadrian 3609227364Sadrian for (;;) { 3610227364Sadrian 3611227364Sadrian /* 3612227364Sadrian * If the upper layers have paused the TID, don't 3613227364Sadrian * queue any further packets. 3614227364Sadrian */ 3615227364Sadrian if (tid->paused) 3616227364Sadrian break; 3617227364Sadrian 3618227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3619227364Sadrian if (bf == NULL) { 3620227364Sadrian break; 3621227364Sadrian } 3622227364Sadrian 3623227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3624227364Sadrian 3625227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 3626227364Sadrian 3627227364Sadrian /* Sanity check! */ 3628227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 3629227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 3630227364Sadrian " tid %d\n", 3631227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 3632227364Sadrian } 3633227364Sadrian /* Normal completion handler */ 3634227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3635227364Sadrian 3636227364Sadrian /* Program descriptors + rate control */ 3637227364Sadrian ath_tx_do_ratelookup(sc, bf); 3638227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3639227364Sadrian ath_tx_set_rtscts(sc, bf); 3640227364Sadrian ath_tx_setds(sc, bf); 3641227364Sadrian ath_tx_chaindesclist(sc, bf); 3642227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3643227364Sadrian 3644227364Sadrian /* Track outstanding buffer count to hardware */ 3645227364Sadrian /* aggregates are "one" buffer */ 3646227364Sadrian tid->hwq_depth++; 3647227364Sadrian 3648227364Sadrian /* Punt to hardware or software txq */ 3649227364Sadrian ath_tx_handoff(sc, txq, bf); 3650227364Sadrian } 3651227364Sadrian} 3652227364Sadrian 3653227364Sadrian/* 3654227364Sadrian * Schedule some packets to the given hardware queue. 3655227364Sadrian * 3656227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 3657227364Sadrian * with queued traffic) and attempts to schedule traffic 3658227364Sadrian * from them. 3659227364Sadrian * 3660227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 3661227364Sadrian * added to the end of the queue after some frames have been 3662227364Sadrian * scheduled. 3663227364Sadrian */ 3664227364Sadrianvoid 3665227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 3666227364Sadrian{ 3667227364Sadrian struct ath_tid *tid, *next, *last; 3668227364Sadrian 3669227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3670227364Sadrian 3671227364Sadrian /* 3672227364Sadrian * Don't schedule if the hardware queue is busy. 3673227364Sadrian * This (hopefully) gives some more time to aggregate 3674227364Sadrian * some packets in the aggregation queue. 3675227364Sadrian */ 3676227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 3677227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 3678227364Sadrian return; 3679227364Sadrian } 3680227364Sadrian 3681227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 3682227364Sadrian 3683227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 3684227364Sadrian /* 3685227364Sadrian * Suspend paused queues here; they'll be resumed 3686227364Sadrian * once the addba completes or times out. 3687227364Sadrian */ 3688227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 3689227364Sadrian __func__, tid->tid, tid->paused); 3690227364Sadrian ath_tx_tid_unsched(sc, tid); 3691227364Sadrian if (tid->paused) { 3692227364Sadrian continue; 3693227364Sadrian } 3694227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 3695227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 3696227364Sadrian else 3697227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 3698227364Sadrian 3699227364Sadrian /* Not empty? Re-schedule */ 3700227364Sadrian if (tid->axq_depth != 0) 3701227364Sadrian ath_tx_tid_sched(sc, tid); 3702227364Sadrian 3703227364Sadrian /* Give the software queue time to aggregate more packets */ 3704227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 3705227364Sadrian break; 3706227364Sadrian } 3707227364Sadrian 3708227364Sadrian /* 3709227364Sadrian * If this was the last entry on the original list, stop. 3710227364Sadrian * Otherwise nodes that have been rescheduled onto the end 3711227364Sadrian * of the TID FIFO list will just keep being rescheduled. 3712227364Sadrian */ 3713227364Sadrian if (tid == last) 3714227364Sadrian break; 3715227364Sadrian } 3716227364Sadrian} 3717227364Sadrian 3718227364Sadrian/* 3719227364Sadrian * TX addba handling 3720227364Sadrian */ 3721227364Sadrian 3722227364Sadrian/* 3723227364Sadrian * Return net80211 TID struct pointer, or NULL for none 3724227364Sadrian */ 3725227364Sadrianstruct ieee80211_tx_ampdu * 3726227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 3727227364Sadrian{ 3728227364Sadrian struct ieee80211_node *ni = &an->an_node; 3729227364Sadrian struct ieee80211_tx_ampdu *tap; 3730227364Sadrian int ac; 3731227364Sadrian 3732227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3733227364Sadrian return NULL; 3734227364Sadrian 3735227364Sadrian ac = TID_TO_WME_AC(tid); 3736227364Sadrian 3737227364Sadrian tap = &ni->ni_tx_ampdu[ac]; 3738227364Sadrian return tap; 3739227364Sadrian} 3740227364Sadrian 3741227364Sadrian/* 3742227364Sadrian * Is AMPDU-TX running? 3743227364Sadrian */ 3744227364Sadrianstatic int 3745227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 3746227364Sadrian{ 3747227364Sadrian struct ieee80211_tx_ampdu *tap; 3748227364Sadrian 3749227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3750227364Sadrian return 0; 3751227364Sadrian 3752227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3753227364Sadrian if (tap == NULL) 3754227364Sadrian return 0; /* Not valid; default to not running */ 3755227364Sadrian 3756227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 3757227364Sadrian} 3758227364Sadrian 3759227364Sadrian/* 3760227364Sadrian * Is AMPDU-TX negotiation pending? 3761227364Sadrian */ 3762227364Sadrianstatic int 3763227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 3764227364Sadrian{ 3765227364Sadrian struct ieee80211_tx_ampdu *tap; 3766227364Sadrian 3767227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3768227364Sadrian return 0; 3769227364Sadrian 3770227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3771227364Sadrian if (tap == NULL) 3772227364Sadrian return 0; /* Not valid; default to not pending */ 3773227364Sadrian 3774227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 3775227364Sadrian} 3776227364Sadrian 3777227364Sadrian/* 3778227364Sadrian * Is AMPDU-TX pending for the given TID? 3779227364Sadrian */ 3780227364Sadrian 3781227364Sadrian 3782227364Sadrian/* 3783227364Sadrian * Method to handle sending an ADDBA request. 3784227364Sadrian * 3785227364Sadrian * We tap this so the relevant flags can be set to pause the TID 3786227364Sadrian * whilst waiting for the response. 3787227364Sadrian * 3788227364Sadrian * XXX there's no timeout handler we can override? 3789227364Sadrian */ 3790227364Sadrianint 3791227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 3792227364Sadrian int dialogtoken, int baparamset, int batimeout) 3793227364Sadrian{ 3794227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3795227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3796227364Sadrian struct ath_node *an = ATH_NODE(ni); 3797227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3798227364Sadrian 3799227364Sadrian /* 3800227364Sadrian * XXX danger Will Robinson! 3801227364Sadrian * 3802227364Sadrian * Although the taskqueue may be running and scheduling some more 3803227364Sadrian * packets, these should all be _before_ the addba sequence number. 3804227364Sadrian * However, net80211 will keep self-assigning sequence numbers 3805227364Sadrian * until addba has been negotiated. 3806227364Sadrian * 3807227364Sadrian * In the past, these packets would be "paused" (which still works 3808227364Sadrian * fine, as they're being scheduled to the driver in the same 3809227364Sadrian * serialised method which is calling the addba request routine) 3810227364Sadrian * and when the aggregation session begins, they'll be dequeued 3811227364Sadrian * as aggregate packets and added to the BAW. However, now there's 3812227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 3813227364Sadrian * packets. Thus they never get included in the BAW tracking and 3814227364Sadrian * this can cause the initial burst of packets after the addba 3815227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 3816227364Sadrian * 3817227364Sadrian * The "eventual" solution should be to tag these packets with 3818227364Sadrian * dobaw. Although net80211 has given us a sequence number, 3819227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 3820227364Sadrian * fall within it. 3821227364Sadrian */ 3822227364Sadrian ath_tx_tid_pause(sc, atid); 3823227364Sadrian 3824227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3825227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 3826227364Sadrian __func__, dialogtoken, baparamset, batimeout); 3827227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3828227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 3829227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 3830227364Sadrian 3831227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 3832227364Sadrian batimeout); 3833227364Sadrian} 3834227364Sadrian 3835227364Sadrian/* 3836227364Sadrian * Handle an ADDBA response. 3837227364Sadrian * 3838227364Sadrian * We unpause the queue so TX'ing can resume. 3839227364Sadrian * 3840227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 3841227364Sadrian * aggregate or not) so the BAW is updated. 3842227364Sadrian * 3843227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 3844227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 3845227364Sadrian * edge won't match the ni->ni_txseq. 3846227364Sadrian * 3847227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 3848227364Sadrian * ni->ni_txseq. 3849227364Sadrian * 3850227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 3851227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 3852227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 3853227364Sadrian * window. 3854227364Sadrian */ 3855227364Sadrianint 3856227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 3857227364Sadrian int status, int code, int batimeout) 3858227364Sadrian{ 3859227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3860227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3861227364Sadrian struct ath_node *an = ATH_NODE(ni); 3862227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3863227364Sadrian int r; 3864227364Sadrian 3865227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3866227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 3867227364Sadrian status, code, batimeout); 3868227364Sadrian 3869227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3870227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 3871227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 3872227364Sadrian 3873227364Sadrian /* 3874227364Sadrian * Call this first, so the interface flags get updated 3875227364Sadrian * before the TID is unpaused. Otherwise a race condition 3876227364Sadrian * exists where the unpaused TID still doesn't yet have 3877227364Sadrian * IEEE80211_AGGR_RUNNING set. 3878227364Sadrian */ 3879227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 3880227364Sadrian 3881227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3882227364Sadrian /* 3883227364Sadrian * XXX dirty! 3884227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 3885227364Sadrian * Read above for more information. 3886227364Sadrian */ 3887227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 3888227364Sadrian ath_tx_tid_resume(sc, atid); 3889227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3890227364Sadrian return r; 3891227364Sadrian} 3892227364Sadrian 3893227364Sadrian 3894227364Sadrian/* 3895227364Sadrian * Stop ADDBA on a queue. 3896227364Sadrian */ 3897227364Sadrianvoid 3898227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 3899227364Sadrian{ 3900227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3901227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3902227364Sadrian struct ath_node *an = ATH_NODE(ni); 3903227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3904227364Sadrian 3905227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 3906227364Sadrian 3907227364Sadrian /* Pause TID traffic early, so there aren't any races */ 3908227364Sadrian ath_tx_tid_pause(sc, atid); 3909227364Sadrian 3910227364Sadrian /* There's no need to hold the TXQ lock here */ 3911227364Sadrian sc->sc_addba_stop(ni, tap); 3912227364Sadrian 3913227364Sadrian /* 3914227364Sadrian * ath_tx_cleanup will resume the TID if possible, otherwise 3915227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 3916227364Sadrian * things have been cleaned up. 3917227364Sadrian */ 3918227364Sadrian ath_tx_cleanup(sc, an, tid); 3919227364Sadrian} 3920227364Sadrian 3921227364Sadrian/* 3922227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 3923227364Sadrian * it simply tears down the aggregation session. Ew. 3924227364Sadrian * 3925227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 3926227364Sadrian * ic->ic_addba_stop(). 3927227364Sadrian * 3928227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 3929227364Sadrian * XXX BAR TX success or failure should be better handled! 3930227364Sadrian */ 3931227364Sadrianvoid 3932227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 3933227364Sadrian int status) 3934227364Sadrian{ 3935227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3936227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3937227364Sadrian struct ath_node *an = ATH_NODE(ni); 3938227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3939227364Sadrian int attempts = tap->txa_attempts; 3940227364Sadrian 3941227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3942227364Sadrian "%s: called; status=%d\n", __func__, status); 3943227364Sadrian 3944227364Sadrian /* Note: This may update the BAW details */ 3945227364Sadrian sc->sc_bar_response(ni, tap, status); 3946227364Sadrian 3947227364Sadrian /* Unpause the TID */ 3948227364Sadrian /* 3949227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 3950227364Sadrian * XXX to a non-aggregate session. So we must unpause the 3951227364Sadrian * XXX TID here or it'll never be done. 3952227364Sadrian */ 3953227364Sadrian if (status == 0 || attempts == 50) { 3954227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3955227364Sadrian ath_tx_tid_resume(sc, atid); 3956227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3957227364Sadrian } 3958227364Sadrian} 3959227364Sadrian 3960227364Sadrian/* 3961227364Sadrian * This is called whenever the pending ADDBA request times out. 3962227364Sadrian * Unpause and reschedule the TID. 3963227364Sadrian */ 3964227364Sadrianvoid 3965227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 3966227364Sadrian struct ieee80211_tx_ampdu *tap) 3967227364Sadrian{ 3968227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3969227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3970227364Sadrian struct ath_node *an = ATH_NODE(ni); 3971227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3972227364Sadrian 3973227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3974227364Sadrian "%s: called; resuming\n", __func__); 3975227364Sadrian 3976227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 3977227364Sadrian sc->sc_addba_response_timeout(ni, tap); 3978227364Sadrian 3979227364Sadrian /* Unpause the TID; which reschedules it */ 3980227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3981227364Sadrian ath_tx_tid_resume(sc, atid); 3982227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3983227364Sadrian} 3984