if_ath_tx.c revision 227868
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 227868 2011-11-23 05:00:25Z 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 */ 438227364Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_desc, bf_first->bf_desc); 439227364Sadrian 440227364Sadrian /* 441227364Sadrian * Set the first descriptor bf_lastds field to point to 442227364Sadrian * the last descriptor in the last subframe, that's where 443227364Sadrian * the status update will occur. 444227364Sadrian */ 445227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 446227364Sadrian 447227364Sadrian /* 448227364Sadrian * And bf_last in the first descriptor points to the end of 449227364Sadrian * the aggregate list. 450227364Sadrian */ 451227364Sadrian bf_first->bf_last = bf_prev; 452227364Sadrian 453227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 454227364Sadrian} 455227364Sadrian 456227364Sadrianstatic void 457227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 458227364Sadrian struct ath_buf *bf) 459227364Sadrian{ 460227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 461227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 462227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 463227364Sadrian if (txq->axq_link != NULL) { 464227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 465227364Sadrian struct ieee80211_frame *wh; 466227364Sadrian 467227364Sadrian /* mark previous frame */ 468227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 469227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 470227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 471227364Sadrian BUS_DMASYNC_PREWRITE); 472227364Sadrian 473227364Sadrian /* link descriptor */ 474227364Sadrian *txq->axq_link = bf->bf_daddr; 475227364Sadrian } 476227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 477227364Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 478227364Sadrian} 479227364Sadrian 480227364Sadrian/* 481227364Sadrian * Hand-off packet to a hardware queue. 482227364Sadrian */ 483227364Sadrianstatic void 484227364Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf) 485227364Sadrian{ 486227364Sadrian struct ath_hal *ah = sc->sc_ah; 487227364Sadrian 488227364Sadrian /* 489218065Sadrian * Insert the frame on the outbound list and pass it on 490218065Sadrian * to the hardware. Multicast frames buffered for power 491218065Sadrian * save stations and transmit from the CAB queue are stored 492218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 493218065Sadrian * the SWBA handler since frames only go out on DTIM and 494218065Sadrian * to avoid possible races. 495218065Sadrian */ 496227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 497218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 498227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 499227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 500227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 501227364Sadrian 502227651Sadrian#if 0 503227651Sadrian /* 504227651Sadrian * This causes a LOR. Find out where the PCU lock is being 505227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 506227651Sadrian * be occuring. 507227651Sadrian */ 508227651Sadrian ATH_PCU_LOCK(sc); 509227651Sadrian if (sc->sc_inreset_cnt) { 510227651Sadrian ATH_PCU_UNLOCK(sc); 511227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 512227651Sadrian "%s: called with sc_in_reset != 0\n", 513227651Sadrian __func__); 514227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 515227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 516227651Sadrian __func__, txq->axq_qnum, 517227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 518227651Sadrian txq->axq_depth); 519227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 520227651Sadrian if (bf->bf_state.bfs_aggr) 521227651Sadrian txq->axq_aggr_depth++; 522227651Sadrian /* 523227651Sadrian * There's no need to update axq_link; the hardware 524227651Sadrian * is in reset and once the reset is complete, any 525227651Sadrian * non-empty queues will simply have DMA restarted. 526227651Sadrian */ 527227651Sadrian return; 528227651Sadrian } 529227651Sadrian ATH_PCU_UNLOCK(sc); 530227651Sadrian#endif 531227651Sadrian 532227364Sadrian /* For now, so not to generate whitespace diffs */ 533227364Sadrian if (1) { 534218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 535218065Sadrian int qbusy; 536218065Sadrian 537218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 538218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 539218065Sadrian if (txq->axq_link == NULL) { 540218065Sadrian /* 541218065Sadrian * Be careful writing the address to TXDP. If 542218065Sadrian * the tx q is enabled then this write will be 543218065Sadrian * ignored. Normally this is not an issue but 544218065Sadrian * when tdma is in use and the q is beacon gated 545218065Sadrian * this race can occur. If the q is busy then 546218065Sadrian * defer the work to later--either when another 547218065Sadrian * packet comes along or when we prepare a beacon 548218065Sadrian * frame at SWBA. 549218065Sadrian */ 550218065Sadrian if (!qbusy) { 551218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 552218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 553218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 554218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 555218065Sadrian __func__, txq->axq_qnum, 556218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 557218065Sadrian txq->axq_depth); 558218065Sadrian } else { 559218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 560218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 561218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 562218065Sadrian txq->axq_qnum); 563218065Sadrian } 564218065Sadrian } else { 565218065Sadrian *txq->axq_link = bf->bf_daddr; 566218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 567218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 568218065Sadrian txq->axq_qnum, txq->axq_link, 569218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, txq->axq_depth); 570218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 571218065Sadrian /* 572218065Sadrian * The q was busy when we previously tried 573218065Sadrian * to write the address of the first buffer 574218065Sadrian * in the chain. Since it's not busy now 575218065Sadrian * handle this chore. We are certain the 576218065Sadrian * buffer at the front is the right one since 577218065Sadrian * axq_link is NULL only when the buffer list 578218065Sadrian * is/was empty. 579218065Sadrian */ 580218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 581227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 582218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 583218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 584218065Sadrian "%s: Q%u restarted\n", __func__, 585218065Sadrian txq->axq_qnum); 586218065Sadrian } 587218065Sadrian } 588218065Sadrian#else 589218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 590218065Sadrian if (txq->axq_link == NULL) { 591218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 592218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 593218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 594218065Sadrian __func__, txq->axq_qnum, 595218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 596218065Sadrian txq->axq_depth); 597218065Sadrian } else { 598218065Sadrian *txq->axq_link = bf->bf_daddr; 599218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 600218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 601218065Sadrian txq->axq_qnum, txq->axq_link, 602218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, txq->axq_depth); 603218065Sadrian } 604218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 605227360Sadrian if (bf->bf_state.bfs_aggr) 606227360Sadrian txq->axq_aggr_depth++; 607227360Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 608218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 609227364Sadrian } 610227364Sadrian} 611218065Sadrian 612227364Sadrian/* 613227364Sadrian * Restart TX DMA for the given TXQ. 614227364Sadrian * 615227364Sadrian * This must be called whether the queue is empty or not. 616227364Sadrian */ 617227364Sadrianvoid 618227364Sadrianath_txq_restart_dma(struct ath_softc *sc, struct ath_txq *txq) 619227364Sadrian{ 620227364Sadrian struct ath_hal *ah = sc->sc_ah; 621227364Sadrian struct ath_buf *bf; 622218065Sadrian 623227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 624227364Sadrian 625227364Sadrian /* This is always going to be cleared, empty or not */ 626227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 627227364Sadrian 628227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 629227364Sadrian if (bf == NULL) 630227364Sadrian return; 631227364Sadrian 632227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 633227364Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 634227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 635218065Sadrian} 636218065Sadrian 637227364Sadrian/* 638227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 639227364Sadrian * 640227364Sadrian * The relevant hardware txq should be locked. 641227364Sadrian */ 642227364Sadrianstatic void 643227364Sadrianath_tx_handoff(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf) 644227364Sadrian{ 645227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 646227364Sadrian 647227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 648227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 649227364Sadrian else 650227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 651227364Sadrian} 652227364Sadrian 653218154Sadrianstatic int 654218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 655218154Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, int *keyix) 656218154Sadrian{ 657218154Sadrian if (iswep) { 658218154Sadrian const struct ieee80211_cipher *cip; 659218154Sadrian struct ieee80211_key *k; 660218154Sadrian 661218154Sadrian /* 662218154Sadrian * Construct the 802.11 header+trailer for an encrypted 663218154Sadrian * frame. The only reason this can fail is because of an 664218154Sadrian * unknown or unsupported cipher/key type. 665218154Sadrian */ 666218154Sadrian k = ieee80211_crypto_encap(ni, m0); 667218154Sadrian if (k == NULL) { 668218154Sadrian /* 669218154Sadrian * This can happen when the key is yanked after the 670218154Sadrian * frame was queued. Just discard the frame; the 671218154Sadrian * 802.11 layer counts failures and provides 672218154Sadrian * debugging/diagnostics. 673218154Sadrian */ 674218154Sadrian return 0; 675218154Sadrian } 676218154Sadrian /* 677218154Sadrian * Adjust the packet + header lengths for the crypto 678218154Sadrian * additions and calculate the h/w key index. When 679218154Sadrian * a s/w mic is done the frame will have had any mic 680218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 681218154Sadrian * account for it. Otherwise we need to add it to the 682218154Sadrian * packet length. 683218154Sadrian */ 684218154Sadrian cip = k->wk_cipher; 685218154Sadrian (*hdrlen) += cip->ic_header; 686218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 687218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 688218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 689218154Sadrian (*pktlen) += cip->ic_miclen; 690218154Sadrian (*keyix) = k->wk_keyix; 691218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 692218154Sadrian /* 693218154Sadrian * Use station key cache slot, if assigned. 694218154Sadrian */ 695218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 696218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 697218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 698218154Sadrian } else 699218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 700218154Sadrian 701218154Sadrian return 1; 702218154Sadrian} 703218154Sadrian 704218932Sadrianstatic uint8_t 705218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 706227364Sadrian int cix, int shortPreamble) 707218157Sadrian{ 708218932Sadrian uint8_t ctsrate; 709218932Sadrian 710218157Sadrian /* 711218157Sadrian * CTS transmit rate is derived from the transmit rate 712218157Sadrian * by looking in the h/w rate table. We must also factor 713218157Sadrian * in whether or not a short preamble is to be used. 714218157Sadrian */ 715218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 716218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 717218932Sadrian ctsrate = rt->info[cix].rateCode; 718218932Sadrian 719218932Sadrian /* XXX this should only matter for legacy rates */ 720218932Sadrian if (shortPreamble) 721218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 722218932Sadrian 723218932Sadrian return ctsrate; 724218932Sadrian} 725218932Sadrian 726218932Sadrian/* 727218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 728218932Sadrian */ 729218932Sadrianstatic int 730218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 731218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 732218932Sadrian int flags) 733218932Sadrian{ 734218932Sadrian int ctsduration = 0; 735218932Sadrian 736218932Sadrian /* This mustn't be called for HT modes */ 737218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 738218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 739218932Sadrian __func__, rt->info[cix].rateCode); 740218932Sadrian return -1; 741218932Sadrian } 742218932Sadrian 743218157Sadrian /* 744218157Sadrian * Compute the transmit duration based on the frame 745218157Sadrian * size and the size of an ACK frame. We call into the 746218157Sadrian * HAL to do the computation since it depends on the 747218157Sadrian * characteristics of the actual PHY being used. 748218157Sadrian * 749218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 750218157Sadrian * use the precalculated ACK durations. 751218157Sadrian */ 752218157Sadrian if (shortPreamble) { 753218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 754218932Sadrian ctsduration += rt->info[cix].spAckDuration; 755218932Sadrian ctsduration += ath_hal_computetxtime(ah, 756218157Sadrian rt, pktlen, rix, AH_TRUE); 757218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 758218932Sadrian ctsduration += rt->info[rix].spAckDuration; 759218157Sadrian } else { 760218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 761218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 762218932Sadrian ctsduration += ath_hal_computetxtime(ah, 763218157Sadrian rt, pktlen, rix, AH_FALSE); 764218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 765218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 766218157Sadrian } 767218932Sadrian 768218932Sadrian return ctsduration; 769218157Sadrian} 770218157Sadrian 771227364Sadrian/* 772227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 773227364Sadrian * values. 774227364Sadrian * 775227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 776227364Sadrian * and cts duration must be re-calculated. 777227364Sadrian * 778227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 779227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 780227364Sadrian * 781227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 782227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 783227364Sadrian */ 784227364Sadrianstatic void 785227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 786218065Sadrian{ 787227364Sadrian uint16_t ctsduration = 0; 788227364Sadrian uint8_t ctsrate = 0; 789227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 790227364Sadrian uint8_t cix = 0; 791227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 792227364Sadrian 793227364Sadrian /* 794227364Sadrian * No RTS/CTS enabled? Don't bother. 795227364Sadrian */ 796227364Sadrian if ((bf->bf_state.bfs_flags & 797227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 798227364Sadrian /* XXX is this really needed? */ 799227364Sadrian bf->bf_state.bfs_ctsrate = 0; 800227364Sadrian bf->bf_state.bfs_ctsduration = 0; 801227364Sadrian return; 802227364Sadrian } 803227364Sadrian 804227364Sadrian /* 805227364Sadrian * If protection is enabled, use the protection rix control 806227364Sadrian * rate. Otherwise use the rate0 control rate. 807227364Sadrian */ 808227364Sadrian if (bf->bf_state.bfs_doprot) 809227364Sadrian rix = sc->sc_protrix; 810227364Sadrian else 811227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 812227364Sadrian 813227364Sadrian /* 814227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 815227364Sadrian * use it. 816227364Sadrian */ 817227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 818227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 819227364Sadrian else 820227364Sadrian /* Control rate from above */ 821227364Sadrian cix = rt->info[rix].controlRate; 822227364Sadrian 823227364Sadrian /* Calculate the rtscts rate for the given cix */ 824227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 825227364Sadrian bf->bf_state.bfs_shpream); 826227364Sadrian 827227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 828227364Sadrian if (! ath_tx_is_11n(sc)) 829227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 830227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 831227364Sadrian rt, bf->bf_state.bfs_flags); 832227364Sadrian 833227364Sadrian /* Squirrel away in ath_buf */ 834227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 835227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 836227364Sadrian 837227364Sadrian /* 838227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 839227364Sadrian * XXX TODO: only for pre-11n NICs. 840227364Sadrian */ 841227364Sadrian bf->bf_state.bfs_ismrr = 0; 842227364Sadrian bf->bf_state.bfs_try0 = 843227364Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 844227364Sadrian} 845227364Sadrian 846227364Sadrian/* 847227364Sadrian * Setup the descriptor chain for a normal or fast-frame 848227364Sadrian * frame. 849227364Sadrian */ 850227364Sadrianstatic void 851227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 852227364Sadrian{ 853227364Sadrian struct ath_desc *ds = bf->bf_desc; 854227364Sadrian struct ath_hal *ah = sc->sc_ah; 855227364Sadrian 856227364Sadrian ath_hal_setuptxdesc(ah, ds 857227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 858227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 859227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 860227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 861227364Sadrian , bf->bf_state.bfs_txrate0 862227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 863227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 864227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 865227364Sadrian , bf->bf_state.bfs_flags /* flags */ 866227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 867227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 868227364Sadrian ); 869227364Sadrian 870227364Sadrian /* 871227364Sadrian * This will be overriden when the descriptor chain is written. 872227364Sadrian */ 873227364Sadrian bf->bf_lastds = ds; 874227364Sadrian bf->bf_last = bf; 875227364Sadrian 876227364Sadrian /* XXX TODO: Setup descriptor chain */ 877227364Sadrian} 878227364Sadrian 879227364Sadrian/* 880227364Sadrian * Do a rate lookup. 881227364Sadrian * 882227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 883227364Sadrian * Non-data frames and raw frames don't require it. 884227364Sadrian * 885227364Sadrian * This populates the primary and MRR entries; MRR values are 886227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 887227364Sadrian * pre-11n chipsets. 888227364Sadrian * 889227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 890227364Sadrian * as they may depend upon the rate chosen. 891227364Sadrian */ 892227364Sadrianstatic void 893227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 894227364Sadrian{ 895227364Sadrian uint8_t rate, rix; 896227364Sadrian int try0; 897227364Sadrian 898227364Sadrian if (! bf->bf_state.bfs_doratelookup) 899227364Sadrian return; 900227364Sadrian 901227364Sadrian /* Get rid of any previous state */ 902227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 903227364Sadrian 904227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 905227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 906227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 907227364Sadrian 908227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 909227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 910227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 911227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 912227364Sadrian 913227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 914227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 915227364Sadrian bf->bf_state.bfs_rc); 916227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 917227364Sadrian 918227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 919227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 920227364Sadrian bf->bf_state.bfs_try0 = try0; 921227364Sadrian bf->bf_state.bfs_txrate0 = rate; 922227364Sadrian} 923227364Sadrian 924227364Sadrian/* 925227364Sadrian * Set the rate control fields in the given descriptor based on 926227364Sadrian * the bf_state fields and node state. 927227364Sadrian * 928227364Sadrian * The bfs fields should already be set with the relevant rate 929227364Sadrian * control information, including whether MRR is to be enabled. 930227364Sadrian * 931227364Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 932227364Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 933227364Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 934227364Sadrian * unconditionally for 11n chips. These require the 11n rate 935227364Sadrian * scenario to be set if MCS rates are enabled, so it's easier 936227364Sadrian * to just always call it. The caller can then only set rates 2, 3 937227364Sadrian * and 4 if multi-rate retry is needed. 938227364Sadrian */ 939227364Sadrianstatic void 940227364Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 941227364Sadrian struct ath_buf *bf) 942227364Sadrian{ 943227364Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 944227364Sadrian 945227364Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 946227364Sadrian if (! bf->bf_state.bfs_ismrr) 947227364Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 948227364Sadrian 949227364Sadrian /* 950227364Sadrian * Always call - that way a retried descriptor will 951227364Sadrian * have the MRR fields overwritten. 952227364Sadrian * 953227364Sadrian * XXX TODO: see if this is really needed - setting up 954227364Sadrian * the first descriptor should set the MRR fields to 0 955227364Sadrian * for us anyway. 956227364Sadrian */ 957227364Sadrian if (ath_tx_is_11n(sc)) { 958227364Sadrian ath_buf_set_rate(sc, ni, bf); 959227364Sadrian } else { 960227364Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 961227364Sadrian , rc[1].ratecode, rc[1].tries 962227364Sadrian , rc[2].ratecode, rc[2].tries 963227364Sadrian , rc[3].ratecode, rc[3].tries 964227364Sadrian ); 965227364Sadrian } 966227364Sadrian} 967227364Sadrian 968227364Sadrian/* 969227364Sadrian * Transmit the given frame to the hardware. 970227364Sadrian * 971227364Sadrian * The frame must already be setup; rate control must already have 972227364Sadrian * been done. 973227364Sadrian * 974227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 975227364Sadrian * it for this long when not doing software aggregation), later on 976227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 977227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 978227364Sadrian */ 979227364Sadrianstatic void 980227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 981227364Sadrian struct ath_buf *bf) 982227364Sadrian{ 983227364Sadrian 984227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 985227364Sadrian 986227364Sadrian /* Setup the descriptor before handoff */ 987227364Sadrian ath_tx_do_ratelookup(sc, bf); 988227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 989227364Sadrian ath_tx_set_rtscts(sc, bf); 990227364Sadrian ath_tx_setds(sc, bf); 991227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 992227364Sadrian ath_tx_chaindesclist(sc, bf); 993227364Sadrian 994227364Sadrian /* Hand off to hardware */ 995227364Sadrian ath_tx_handoff(sc, txq, bf); 996227364Sadrian} 997227364Sadrian 998227364Sadrian 999227364Sadrian 1000227364Sadrianstatic int 1001227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1002227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1003227364Sadrian{ 1004218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1005218065Sadrian struct ath_vap *avp = ATH_VAP(vap); 1006218065Sadrian struct ath_hal *ah = sc->sc_ah; 1007218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1008218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1009218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1010218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1011227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1012227364Sadrian u_int8_t rix = 0, txrate = 0; 1013218065Sadrian struct ath_desc *ds; 1014218065Sadrian struct ath_txq *txq; 1015218065Sadrian struct ieee80211_frame *wh; 1016227364Sadrian u_int subtype, flags; 1017218065Sadrian HAL_PKT_TYPE atype; 1018218065Sadrian const HAL_RATE_TABLE *rt; 1019218065Sadrian HAL_BOOL shortPreamble; 1020218065Sadrian struct ath_node *an; 1021218065Sadrian u_int pri; 1022218065Sadrian 1023218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1024218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1025218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1026218065Sadrian isfrag = m0->m_flags & M_FRAG; 1027218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1028218065Sadrian /* 1029218065Sadrian * Packet length must not include any 1030218065Sadrian * pad bytes; deduct them here. 1031218065Sadrian */ 1032218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1033218065Sadrian 1034218154Sadrian /* Handle encryption twiddling if needed */ 1035227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1036227364Sadrian &pktlen, &keyix)) { 1037218154Sadrian ath_freetx(m0); 1038218154Sadrian return EIO; 1039218154Sadrian } 1040218065Sadrian 1041218154Sadrian /* packet header may have moved, reset our local pointer */ 1042218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1043218065Sadrian 1044218065Sadrian pktlen += IEEE80211_CRC_LEN; 1045218065Sadrian 1046218065Sadrian /* 1047218065Sadrian * Load the DMA map so any coalescing is done. This 1048218065Sadrian * also calculates the number of descriptors we need. 1049218065Sadrian */ 1050218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1051218065Sadrian if (error != 0) 1052218065Sadrian return error; 1053218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1054218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1055218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1056218065Sadrian 1057218065Sadrian /* setup descriptors */ 1058218065Sadrian ds = bf->bf_desc; 1059218065Sadrian rt = sc->sc_currates; 1060218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1061218065Sadrian 1062218065Sadrian /* 1063218065Sadrian * NB: the 802.11 layer marks whether or not we should 1064218065Sadrian * use short preamble based on the current mode and 1065218065Sadrian * negotiated parameters. 1066218065Sadrian */ 1067218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1068218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1069218065Sadrian shortPreamble = AH_TRUE; 1070218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1071218065Sadrian } else { 1072218065Sadrian shortPreamble = AH_FALSE; 1073218065Sadrian } 1074218065Sadrian 1075218065Sadrian an = ATH_NODE(ni); 1076218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1077218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1078218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1079218065Sadrian /* XXX use txparams instead of fixed values */ 1080218065Sadrian /* 1081218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1082218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1083218065Sadrian */ 1084218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1085218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1086218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1087218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1088218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1089218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1090218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1091218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1092218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1093218065Sadrian else 1094218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1095218065Sadrian rix = an->an_mgmtrix; 1096218065Sadrian txrate = rt->info[rix].rateCode; 1097218065Sadrian if (shortPreamble) 1098218065Sadrian txrate |= rt->info[rix].shortPreamble; 1099218065Sadrian try0 = ATH_TXMGTTRY; 1100218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1101218065Sadrian break; 1102218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1103218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1104218065Sadrian rix = an->an_mgmtrix; 1105218065Sadrian txrate = rt->info[rix].rateCode; 1106218065Sadrian if (shortPreamble) 1107218065Sadrian txrate |= rt->info[rix].shortPreamble; 1108218065Sadrian try0 = ATH_TXMGTTRY; 1109218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1110218065Sadrian break; 1111218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1112218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1113218065Sadrian /* 1114218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1115218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1116218065Sadrian * the rate control module for the rate to use. 1117218065Sadrian */ 1118218065Sadrian if (ismcast) { 1119218065Sadrian rix = an->an_mcastrix; 1120218065Sadrian txrate = rt->info[rix].rateCode; 1121218065Sadrian if (shortPreamble) 1122218065Sadrian txrate |= rt->info[rix].shortPreamble; 1123218065Sadrian try0 = 1; 1124218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1125218065Sadrian /* XXX? maybe always use long preamble? */ 1126218065Sadrian rix = an->an_mgmtrix; 1127218065Sadrian txrate = rt->info[rix].rateCode; 1128218065Sadrian if (shortPreamble) 1129218065Sadrian txrate |= rt->info[rix].shortPreamble; 1130218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1131218065Sadrian } else { 1132227364Sadrian /* 1133227364Sadrian * Do rate lookup on each TX, rather than using 1134227364Sadrian * the hard-coded TX information decided here. 1135227364Sadrian */ 1136227364Sadrian ismrr = 1; 1137227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1138218065Sadrian } 1139218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1140218065Sadrian flags |= HAL_TXDESC_NOACK; 1141218065Sadrian break; 1142218065Sadrian default: 1143218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1144218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1145218065Sadrian /* XXX statistic */ 1146218065Sadrian ath_freetx(m0); 1147218065Sadrian return EIO; 1148218065Sadrian } 1149218065Sadrian txq = sc->sc_ac2q[pri]; 1150218065Sadrian 1151218065Sadrian /* 1152218065Sadrian * When servicing one or more stations in power-save mode 1153218065Sadrian * (or) if there is some mcast data waiting on the mcast 1154218065Sadrian * queue (to prevent out of order delivery) multicast 1155218065Sadrian * frames must be buffered until after the beacon. 1156218065Sadrian */ 1157218065Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1158218065Sadrian txq = &avp->av_mcastq; 1159218065Sadrian 1160218065Sadrian /* 1161218065Sadrian * Calculate miscellaneous flags. 1162218065Sadrian */ 1163218065Sadrian if (ismcast) { 1164218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1165218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1166218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1167218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1168218065Sadrian sc->sc_stats.ast_tx_rts++; 1169218065Sadrian } 1170218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1171218065Sadrian sc->sc_stats.ast_tx_noack++; 1172218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1173218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1174218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1175218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1176218065Sadrian sc->sc_stats.ast_tdma_ack++; 1177218065Sadrian ath_freetx(m0); 1178218065Sadrian return EIO; 1179218065Sadrian } 1180218065Sadrian#endif 1181218065Sadrian 1182218065Sadrian /* 1183218065Sadrian * If 802.11g protection is enabled, determine whether 1184218065Sadrian * to use RTS/CTS or just CTS. Note that this is only 1185218065Sadrian * done for OFDM unicast frames. 1186218065Sadrian */ 1187218065Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 1188218065Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 1189218065Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1190227364Sadrian bf->bf_state.bfs_doprot = 1; 1191218065Sadrian /* XXX fragments must use CCK rates w/ protection */ 1192227364Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 1193218065Sadrian flags |= HAL_TXDESC_RTSENA; 1194227364Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 1195218065Sadrian flags |= HAL_TXDESC_CTSENA; 1196227364Sadrian } 1197227364Sadrian /* 1198227364Sadrian * For frags it would be desirable to use the 1199227364Sadrian * highest CCK rate for RTS/CTS. But stations 1200227364Sadrian * farther away may detect it at a lower CCK rate 1201227364Sadrian * so use the configured protection rate instead 1202227364Sadrian * (for now). 1203227364Sadrian */ 1204218065Sadrian sc->sc_stats.ast_tx_protect++; 1205218065Sadrian } 1206218065Sadrian 1207220098Sadrian#if 0 1208218065Sadrian /* 1209220098Sadrian * If 11n protection is enabled and it's a HT frame, 1210220098Sadrian * enable RTS. 1211220098Sadrian * 1212220098Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 1213220098Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 1214220098Sadrian * XXX indicates it's not a HT pure environment? 1215220098Sadrian */ 1216220098Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 1217220098Sadrian rt->info[rix].phy == IEEE80211_T_HT && 1218220098Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1219220098Sadrian cix = rt->info[sc->sc_protrix].controlRate; 1220220098Sadrian flags |= HAL_TXDESC_RTSENA; 1221220098Sadrian sc->sc_stats.ast_tx_htprotect++; 1222220098Sadrian } 1223220098Sadrian#endif 1224220098Sadrian 1225220098Sadrian /* 1226218065Sadrian * Calculate duration. This logically belongs in the 802.11 1227218065Sadrian * layer but it lacks sufficient information to calculate it. 1228218065Sadrian */ 1229218065Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 1230218065Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 1231218065Sadrian u_int16_t dur; 1232218065Sadrian if (shortPreamble) 1233218065Sadrian dur = rt->info[rix].spAckDuration; 1234218065Sadrian else 1235218065Sadrian dur = rt->info[rix].lpAckDuration; 1236218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 1237218065Sadrian dur += dur; /* additional SIFS+ACK */ 1238218065Sadrian KASSERT(m0->m_nextpkt != NULL, ("no fragment")); 1239218065Sadrian /* 1240218065Sadrian * Include the size of next fragment so NAV is 1241218065Sadrian * updated properly. The last fragment uses only 1242218065Sadrian * the ACK duration 1243218065Sadrian */ 1244218065Sadrian dur += ath_hal_computetxtime(ah, rt, 1245218065Sadrian m0->m_nextpkt->m_pkthdr.len, 1246218065Sadrian rix, shortPreamble); 1247218065Sadrian } 1248218065Sadrian if (isfrag) { 1249218065Sadrian /* 1250218065Sadrian * Force hardware to use computed duration for next 1251218065Sadrian * fragment by disabling multi-rate retry which updates 1252218065Sadrian * duration based on the multi-rate duration table. 1253218065Sadrian */ 1254218065Sadrian ismrr = 0; 1255218065Sadrian try0 = ATH_TXMGTTRY; /* XXX? */ 1256218065Sadrian } 1257218065Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 1258218065Sadrian } 1259218065Sadrian 1260218065Sadrian /* 1261227364Sadrian * Determine if a tx interrupt should be generated for 1262227364Sadrian * this descriptor. We take a tx interrupt to reap 1263227364Sadrian * descriptors when the h/w hits an EOL condition or 1264227364Sadrian * when the descriptor is specifically marked to generate 1265227364Sadrian * an interrupt. We periodically mark descriptors in this 1266227364Sadrian * way to insure timely replenishing of the supply needed 1267227364Sadrian * for sending frames. Defering interrupts reduces system 1268227364Sadrian * load and potentially allows more concurrent work to be 1269227364Sadrian * done but if done to aggressively can cause senders to 1270227364Sadrian * backup. 1271227364Sadrian * 1272227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1273227364Sadrian * dynamically through sysctl. 1274218065Sadrian */ 1275227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1276227364Sadrian txq->axq_intrcnt = 0; 1277227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1278227364Sadrian flags |= HAL_TXDESC_INTREQ; 1279227364Sadrian txq->axq_intrcnt = 0; 1280227364Sadrian } 1281218932Sadrian 1282227364Sadrian /* This point forward is actual TX bits */ 1283218065Sadrian 1284218065Sadrian /* 1285218065Sadrian * At this point we are committed to sending the frame 1286218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1287218065Sadrian * case this frame is part of frag chain. 1288218065Sadrian */ 1289218065Sadrian m0->m_nextpkt = NULL; 1290218065Sadrian 1291218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1292218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1293218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1294218065Sadrian 1295218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1296218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1297218065Sadrian 1298218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1299218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1300218065Sadrian if (iswep) 1301218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1302218065Sadrian if (isfrag) 1303218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1304218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1305218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1306218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1307218065Sadrian 1308218065Sadrian ieee80211_radiotap_tx(vap, m0); 1309218065Sadrian } 1310218065Sadrian 1311227364Sadrian /* Blank the legacy rate array */ 1312227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1313227364Sadrian 1314218065Sadrian /* 1315227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1316227364Sadrian * the rate scenario. 1317227364Sadrian */ 1318227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1319227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1320227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1321227364Sadrian 1322227364Sadrian /* Store the decided rate index values away */ 1323227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1324227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1325227364Sadrian bf->bf_state.bfs_atype = atype; 1326227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1327227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1328227364Sadrian bf->bf_state.bfs_try0 = try0; 1329227364Sadrian bf->bf_state.bfs_keyix = keyix; 1330227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1331227364Sadrian bf->bf_state.bfs_flags = flags; 1332227364Sadrian bf->bf_txflags = flags; 1333227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1334227364Sadrian 1335227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1336227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1337227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1338227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1339227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1340227364Sadrian 1341227364Sadrian return 0; 1342227364Sadrian} 1343227364Sadrian 1344227364Sadrian/* 1345227364Sadrian * Direct-dispatch the current frame to the hardware. 1346227364Sadrian * 1347227364Sadrian * This can be called by the net80211 code. 1348227364Sadrian * 1349227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1350227364Sadrian * XXX aggregate scheduler so its serialised? 1351227364Sadrian */ 1352227364Sadrianint 1353227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1354227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1355227364Sadrian{ 1356227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1357227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1358227364Sadrian int r; 1359227364Sadrian u_int pri; 1360227364Sadrian int tid; 1361227364Sadrian struct ath_txq *txq; 1362227364Sadrian int ismcast; 1363227364Sadrian const struct ieee80211_frame *wh; 1364227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1365227364Sadrian ieee80211_seq seqno; 1366227364Sadrian uint8_t type, subtype; 1367227364Sadrian 1368227364Sadrian /* 1369227364Sadrian * Determine the target hardware queue. 1370218065Sadrian * 1371227364Sadrian * For multicast frames, the txq gets overridden to be the 1372227364Sadrian * software TXQ and it's done via direct-dispatch. 1373227364Sadrian * 1374227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1375227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1376227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1377227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1378227364Sadrian * having a node TID queued to multiple hardware TXQs. 1379227364Sadrian * This may change in the future but would require some locking 1380227364Sadrian * fudgery. 1381218065Sadrian */ 1382227364Sadrian pri = ath_tx_getac(sc, m0); 1383227364Sadrian tid = ath_tx_gettid(sc, m0); 1384218065Sadrian 1385227364Sadrian txq = sc->sc_ac2q[pri]; 1386227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1387227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1388227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1389227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1390227364Sadrian 1391227364Sadrian /* A-MPDU TX */ 1392227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1393227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1394227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1395227364Sadrian 1396227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1397227364Sadrian __func__, tid, pri, is_ampdu); 1398227364Sadrian 1399227364Sadrian /* Multicast frames go onto the software multicast queue */ 1400227364Sadrian if (ismcast) 1401227364Sadrian txq = &avp->av_mcastq; 1402227364Sadrian 1403227364Sadrian if ((! is_ampdu) && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1404227364Sadrian txq = &avp->av_mcastq; 1405227364Sadrian 1406227364Sadrian /* Do the generic frame setup */ 1407227364Sadrian /* XXX should just bzero the bf_state? */ 1408227364Sadrian bf->bf_state.bfs_dobaw = 0; 1409227364Sadrian 1410227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1411227364Sadrian /* Don't do it whilst pending; the net80211 layer still assigns them */ 1412227364Sadrian /* XXX do we need locking here? */ 1413227364Sadrian if (is_ampdu_tx) { 1414227364Sadrian ATH_TXQ_LOCK(txq); 1415227364Sadrian /* 1416227364Sadrian * Always call; this function will 1417227364Sadrian * handle making sure that null data frames 1418227364Sadrian * don't get a sequence number from the current 1419227364Sadrian * TID and thus mess with the BAW. 1420227364Sadrian */ 1421227364Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1422227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1423227364Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1424227364Sadrian bf->bf_state.bfs_dobaw = 1; 1425227364Sadrian } 1426227364Sadrian ATH_TXQ_UNLOCK(txq); 1427218240Sadrian } 1428218240Sadrian 1429218065Sadrian /* 1430227364Sadrian * If needed, the sequence number has been assigned. 1431227364Sadrian * Squirrel it away somewhere easy to get to. 1432218065Sadrian */ 1433227364Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1434227364Sadrian 1435227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1436227364Sadrian if (is_ampdu_pending) 1437227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1438227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1439227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1440227364Sadrian 1441227364Sadrian /* This also sets up the DMA map */ 1442227364Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0); 1443227364Sadrian 1444227364Sadrian if (r != 0) 1445227364Sadrian return r; 1446227364Sadrian 1447227364Sadrian /* At this point m0 could have changed! */ 1448227364Sadrian m0 = bf->bf_m; 1449227364Sadrian 1450227364Sadrian#if 1 1451218065Sadrian /* 1452227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1453227364Sadrian * destination hardware queue. Don't bother software 1454227364Sadrian * queuing it. 1455218065Sadrian */ 1456227364Sadrian /* 1457227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1458227364Sadrian * destination hardware queue. Don't bother software 1459227364Sadrian * queuing it, as the TID will now be paused. 1460227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1461227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1462227364Sadrian * It queues directly to hardware because the TID is paused 1463227364Sadrian * at this point (and won't be unpaused until the BAR has 1464227364Sadrian * either been TXed successfully or max retries has been 1465227364Sadrian * reached.) 1466227364Sadrian */ 1467227364Sadrian if (txq == &avp->av_mcastq) { 1468227364Sadrian ATH_TXQ_LOCK(txq); 1469227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1470227364Sadrian ATH_TXQ_UNLOCK(txq); 1471227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1472227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1473227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 1474227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1475227364Sadrian ATH_TXQ_LOCK(txq); 1476227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1477227364Sadrian ATH_TXQ_UNLOCK(txq); 1478227364Sadrian } else { 1479227364Sadrian /* add to software queue */ 1480227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1481227364Sadrian } 1482227364Sadrian#else 1483227364Sadrian /* 1484227364Sadrian * For now, since there's no software queue, 1485227364Sadrian * direct-dispatch to the hardware. 1486227364Sadrian */ 1487227364Sadrian ATH_TXQ_LOCK(txq); 1488227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1489227364Sadrian ATH_TXQ_UNLOCK(txq); 1490227364Sadrian#endif 1491218065Sadrian 1492218065Sadrian return 0; 1493218065Sadrian} 1494218065Sadrian 1495218065Sadrianstatic int 1496218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1497218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1498218065Sadrian const struct ieee80211_bpf_params *params) 1499218065Sadrian{ 1500218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1501218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1502218065Sadrian struct ath_hal *ah = sc->sc_ah; 1503218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1504218065Sadrian int error, ismcast, ismrr; 1505218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1506227364Sadrian u_int8_t rix, txrate; 1507218065Sadrian struct ieee80211_frame *wh; 1508227364Sadrian u_int flags; 1509218065Sadrian HAL_PKT_TYPE atype; 1510218065Sadrian const HAL_RATE_TABLE *rt; 1511218065Sadrian struct ath_desc *ds; 1512218065Sadrian u_int pri; 1513227364Sadrian int o_tid = -1; 1514227364Sadrian int do_override; 1515218065Sadrian 1516218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1517218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1518218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1519218065Sadrian /* 1520218065Sadrian * Packet length must not include any 1521218065Sadrian * pad bytes; deduct them here. 1522218065Sadrian */ 1523218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1524218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1525218065Sadrian 1526227364Sadrian 1527227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1528227364Sadrian __func__, ismcast); 1529227364Sadrian 1530218154Sadrian /* Handle encryption twiddling if needed */ 1531227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1532227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1533227364Sadrian &hdrlen, &pktlen, &keyix)) { 1534218154Sadrian ath_freetx(m0); 1535218154Sadrian return EIO; 1536218154Sadrian } 1537218154Sadrian /* packet header may have moved, reset our local pointer */ 1538218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1539218065Sadrian 1540227364Sadrian /* Do the generic frame setup */ 1541227364Sadrian /* XXX should just bzero the bf_state? */ 1542227364Sadrian bf->bf_state.bfs_dobaw = 0; 1543227364Sadrian 1544218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1545218065Sadrian if (error != 0) 1546218065Sadrian return error; 1547218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1548218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1549218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1550218065Sadrian 1551218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1552218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1553218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1554218065Sadrian flags |= HAL_TXDESC_RTSENA; 1555227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1556227364Sadrian /* XXX assume 11g/11n protection? */ 1557227364Sadrian bf->bf_state.bfs_doprot = 1; 1558218065Sadrian flags |= HAL_TXDESC_CTSENA; 1559227364Sadrian } 1560218065Sadrian /* XXX leave ismcast to injector? */ 1561218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1562218065Sadrian flags |= HAL_TXDESC_NOACK; 1563218065Sadrian 1564218065Sadrian rt = sc->sc_currates; 1565218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1566218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1567218065Sadrian txrate = rt->info[rix].rateCode; 1568218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1569218065Sadrian txrate |= rt->info[rix].shortPreamble; 1570218065Sadrian sc->sc_txrix = rix; 1571218065Sadrian try0 = params->ibp_try0; 1572218065Sadrian ismrr = (params->ibp_try1 != 0); 1573218065Sadrian txantenna = params->ibp_pri >> 2; 1574218065Sadrian if (txantenna == 0) /* XXX? */ 1575218065Sadrian txantenna = sc->sc_txantenna; 1576218157Sadrian 1577227364Sadrian /* 1578227364Sadrian * Since ctsrate is fixed, store it away for later 1579227364Sadrian * use when the descriptor fields are being set. 1580227364Sadrian */ 1581227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1582227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1583218157Sadrian 1584218065Sadrian pri = params->ibp_pri & 3; 1585227364Sadrian /* Override pri if the frame isn't a QoS one */ 1586227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1587227364Sadrian pri = ath_tx_getac(sc, m0); 1588227364Sadrian 1589218065Sadrian /* 1590218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1591218065Sadrian * set the sequence number, duration, etc. 1592218065Sadrian */ 1593218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1594218065Sadrian 1595218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1596218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1597218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1598218065Sadrian 1599218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1600218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1601218065Sadrian 1602218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1603218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1604218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1605218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1606218065Sadrian if (m0->m_flags & M_FRAG) 1607218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1608218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1609218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1610218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1611218065Sadrian 1612218065Sadrian ieee80211_radiotap_tx(vap, m0); 1613218065Sadrian } 1614218065Sadrian 1615218065Sadrian /* 1616218065Sadrian * Formulate first tx descriptor with tx controls. 1617218065Sadrian */ 1618218065Sadrian ds = bf->bf_desc; 1619218065Sadrian /* XXX check return value? */ 1620227364Sadrian 1621227364Sadrian /* Store the decided rate index values away */ 1622227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1623227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1624227364Sadrian bf->bf_state.bfs_atype = atype; 1625227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1626227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1627227364Sadrian bf->bf_state.bfs_try0 = try0; 1628227364Sadrian bf->bf_state.bfs_keyix = keyix; 1629227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1630227364Sadrian bf->bf_state.bfs_flags = flags; 1631218065Sadrian bf->bf_txflags = flags; 1632227364Sadrian bf->bf_state.bfs_shpream = 1633227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1634218065Sadrian 1635227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1636227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1637227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1638227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1639218240Sadrian 1640227364Sadrian /* Blank the legacy rate array */ 1641227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1642218240Sadrian 1643227364Sadrian bf->bf_state.bfs_rc[0].rix = 1644227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1645227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1646227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1647227364Sadrian 1648227364Sadrian if (ismrr) { 1649227364Sadrian int rix; 1650227364Sadrian 1651227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1652227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1653227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1654227364Sadrian 1655227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1656227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1657227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1658227364Sadrian 1659227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1660227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1661227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1662218065Sadrian } 1663227364Sadrian /* 1664227364Sadrian * All the required rate control decisions have been made; 1665227364Sadrian * fill in the rc flags. 1666227364Sadrian */ 1667227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1668218065Sadrian 1669227364Sadrian /* NB: no buffered multicast in power save support */ 1670227364Sadrian 1671227364Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1672227364Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1673227364Sadrian 1674227364Sadrian /* Map ADDBA to the correct priority */ 1675227364Sadrian if (do_override) { 1676227364Sadrian#if 0 1677227364Sadrian device_printf(sc->sc_dev, 1678227364Sadrian "%s: overriding tid %d pri %d -> %d\n", 1679227364Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1680227364Sadrian#endif 1681227364Sadrian pri = TID_TO_WME_AC(o_tid); 1682218240Sadrian } 1683218240Sadrian 1684227364Sadrian /* 1685227364Sadrian * If we're overiding the ADDBA destination, dump directly 1686227364Sadrian * into the hardware queue, right after any pending 1687227364Sadrian * frames to that node are. 1688227364Sadrian */ 1689227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1690227364Sadrian __func__, do_override); 1691227364Sadrian 1692227364Sadrian if (do_override) { 1693227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1694227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1695227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1696227364Sadrian } else { 1697227364Sadrian /* Queue to software queue */ 1698227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1699227364Sadrian } 1700227364Sadrian 1701218065Sadrian return 0; 1702218065Sadrian} 1703218065Sadrian 1704227364Sadrian/* 1705227364Sadrian * Send a raw frame. 1706227364Sadrian * 1707227364Sadrian * This can be called by net80211. 1708227364Sadrian */ 1709218065Sadrianint 1710218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1711218065Sadrian const struct ieee80211_bpf_params *params) 1712218065Sadrian{ 1713218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1714218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1715218065Sadrian struct ath_softc *sc = ifp->if_softc; 1716218065Sadrian struct ath_buf *bf; 1717218065Sadrian int error; 1718218065Sadrian 1719227651Sadrian ATH_PCU_LOCK(sc); 1720227651Sadrian if (sc->sc_inreset_cnt > 0) { 1721227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 1722227651Sadrian __func__); 1723227651Sadrian error = EIO; 1724227651Sadrian ATH_PCU_UNLOCK(sc); 1725227651Sadrian goto bad0; 1726227651Sadrian } 1727227651Sadrian sc->sc_txstart_cnt++; 1728227651Sadrian ATH_PCU_UNLOCK(sc); 1729227651Sadrian 1730218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 1731218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 1732218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 1733218065Sadrian "!running" : "invalid"); 1734218065Sadrian m_freem(m); 1735218065Sadrian error = ENETDOWN; 1736218065Sadrian goto bad; 1737218065Sadrian } 1738218065Sadrian /* 1739218065Sadrian * Grab a TX buffer and associated resources. 1740218065Sadrian */ 1741218065Sadrian bf = ath_getbuf(sc); 1742218065Sadrian if (bf == NULL) { 1743218065Sadrian sc->sc_stats.ast_tx_nobuf++; 1744218065Sadrian m_freem(m); 1745218065Sadrian error = ENOBUFS; 1746218065Sadrian goto bad; 1747218065Sadrian } 1748218065Sadrian 1749218065Sadrian if (params == NULL) { 1750218065Sadrian /* 1751218065Sadrian * Legacy path; interpret frame contents to decide 1752218065Sadrian * precisely how to send the frame. 1753218065Sadrian */ 1754218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 1755218065Sadrian error = EIO; /* XXX */ 1756218065Sadrian goto bad2; 1757218065Sadrian } 1758218065Sadrian } else { 1759218065Sadrian /* 1760218065Sadrian * Caller supplied explicit parameters to use in 1761218065Sadrian * sending the frame. 1762218065Sadrian */ 1763218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 1764218065Sadrian error = EIO; /* XXX */ 1765218065Sadrian goto bad2; 1766218065Sadrian } 1767218065Sadrian } 1768218065Sadrian sc->sc_wd_timer = 5; 1769218065Sadrian ifp->if_opackets++; 1770218065Sadrian sc->sc_stats.ast_tx_raw++; 1771218065Sadrian 1772227651Sadrian ATH_PCU_LOCK(sc); 1773227651Sadrian sc->sc_txstart_cnt--; 1774227651Sadrian ATH_PCU_UNLOCK(sc); 1775227651Sadrian 1776218065Sadrian return 0; 1777218065Sadrianbad2: 1778218065Sadrian ATH_TXBUF_LOCK(sc); 1779227344Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); 1780218065Sadrian ATH_TXBUF_UNLOCK(sc); 1781218065Sadrianbad: 1782227651Sadrian ATH_PCU_LOCK(sc); 1783227651Sadrian sc->sc_txstart_cnt--; 1784227651Sadrian ATH_PCU_UNLOCK(sc); 1785227651Sadrianbad0: 1786218065Sadrian ifp->if_oerrors++; 1787218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 1788218065Sadrian ieee80211_free_node(ni); 1789227651Sadrian 1790218065Sadrian return error; 1791218065Sadrian} 1792227364Sadrian 1793227364Sadrian/* Some helper functions */ 1794227364Sadrian 1795227364Sadrian/* 1796227364Sadrian * ADDBA (and potentially others) need to be placed in the same 1797227364Sadrian * hardware queue as the TID/node it's relating to. This is so 1798227364Sadrian * it goes out after any pending non-aggregate frames to the 1799227364Sadrian * same node/TID. 1800227364Sadrian * 1801227364Sadrian * If this isn't done, the ADDBA can go out before the frames 1802227364Sadrian * queued in hardware. Even though these frames have a sequence 1803227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 1804227364Sadrian * no frames whose sequence numbers are after the ADDBA should 1805227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 1806227364Sadrian * will simply drop them as being out of the BAW. 1807227364Sadrian * 1808227364Sadrian * The frames can't be appended to the TID software queue - it'll 1809227364Sadrian * never be sent out. So these frames have to be directly 1810227364Sadrian * dispatched to the hardware, rather than queued in software. 1811227364Sadrian * So if this function returns true, the TXQ has to be 1812227364Sadrian * overridden and it has to be directly dispatched. 1813227364Sadrian * 1814227364Sadrian * It's a dirty hack, but someone's gotta do it. 1815227364Sadrian */ 1816227364Sadrian 1817227364Sadrian/* 1818227364Sadrian * XXX doesn't belong here! 1819227364Sadrian */ 1820227364Sadrianstatic int 1821227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 1822227364Sadrian{ 1823227364Sadrian /* Type: Management frame? */ 1824227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 1825227364Sadrian IEEE80211_FC0_TYPE_MGT) 1826227364Sadrian return 0; 1827227364Sadrian 1828227364Sadrian /* Subtype: Action frame? */ 1829227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 1830227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 1831227364Sadrian return 0; 1832227364Sadrian 1833227364Sadrian return 1; 1834227364Sadrian} 1835227364Sadrian 1836227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1837227364Sadrian/* 1838227364Sadrian * Return an alternate TID for ADDBA request frames. 1839227364Sadrian * 1840227364Sadrian * Yes, this likely should be done in the net80211 layer. 1841227364Sadrian */ 1842227364Sadrianstatic int 1843227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 1844227364Sadrian struct ieee80211_node *ni, 1845227364Sadrian struct mbuf *m0, int *tid) 1846227364Sadrian{ 1847227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 1848227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 1849227364Sadrian uint8_t *frm; 1850227364Sadrian uint16_t baparamset; 1851227364Sadrian 1852227364Sadrian /* Not action frame? Bail */ 1853227364Sadrian if (! ieee80211_is_action(wh)) 1854227364Sadrian return 0; 1855227364Sadrian 1856227364Sadrian /* XXX Not needed for frames we send? */ 1857227364Sadrian#if 0 1858227364Sadrian /* Correct length? */ 1859227364Sadrian if (! ieee80211_parse_action(ni, m)) 1860227364Sadrian return 0; 1861227364Sadrian#endif 1862227364Sadrian 1863227364Sadrian /* Extract out action frame */ 1864227364Sadrian frm = (u_int8_t *)&wh[1]; 1865227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 1866227364Sadrian 1867227364Sadrian /* Not ADDBA? Bail */ 1868227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 1869227364Sadrian return 0; 1870227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 1871227364Sadrian return 0; 1872227364Sadrian 1873227364Sadrian /* Extract TID, return it */ 1874227364Sadrian baparamset = le16toh(ia->rq_baparamset); 1875227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 1876227364Sadrian 1877227364Sadrian return 1; 1878227364Sadrian} 1879227364Sadrian#undef MS 1880227364Sadrian 1881227364Sadrian/* Per-node software queue operations */ 1882227364Sadrian 1883227364Sadrian/* 1884227364Sadrian * Add the current packet to the given BAW. 1885227364Sadrian * It is assumed that the current packet 1886227364Sadrian * 1887227364Sadrian * + fits inside the BAW; 1888227364Sadrian * + already has had a sequence number allocated. 1889227364Sadrian * 1890227364Sadrian * Since the BAW status may be modified by both the ath task and 1891227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 1892227364Sadrian */ 1893227364Sadrianvoid 1894227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 1895227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 1896227364Sadrian{ 1897227364Sadrian int index, cindex; 1898227364Sadrian struct ieee80211_tx_ampdu *tap; 1899227364Sadrian 1900227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 1901227364Sadrian 1902227364Sadrian if (bf->bf_state.bfs_isretried) 1903227364Sadrian return; 1904227364Sadrian 1905227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 1906227364Sadrian 1907227364Sadrian if (bf->bf_state.bfs_addedbaw) 1908227364Sadrian device_printf(sc->sc_dev, 1909227364Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; baw head=%d tail=%d\n", 1910227364Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 1911227364Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, tid->baw_tail); 1912227364Sadrian 1913227364Sadrian /* 1914227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 1915227364Sadrian * the txa state contains the current baw start. 1916227364Sadrian */ 1917227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 1918227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 1919227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 1920227364Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d baw head=%d tail=%d\n", 1921227364Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 1922227364Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, tid->baw_tail); 1923227364Sadrian 1924227364Sadrian 1925227364Sadrian#if 0 1926227364Sadrian assert(tid->tx_buf[cindex] == NULL); 1927227364Sadrian#endif 1928227364Sadrian if (tid->tx_buf[cindex] != NULL) { 1929227364Sadrian device_printf(sc->sc_dev, 1930227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 1931227364Sadrian "head=%d, tail=%d)\n", 1932227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 1933227364Sadrian device_printf(sc->sc_dev, 1934227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 1935227364Sadrian __func__, 1936227364Sadrian tid->tx_buf[cindex], 1937227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 1938227364Sadrian bf, 1939227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 1940227364Sadrian ); 1941227364Sadrian } 1942227364Sadrian tid->tx_buf[cindex] = bf; 1943227364Sadrian 1944227364Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & (ATH_TID_MAX_BUFS - 1))) { 1945227364Sadrian tid->baw_tail = cindex; 1946227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 1947227364Sadrian } 1948227364Sadrian} 1949227364Sadrian 1950227364Sadrian/* 1951227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 1952227398Sadrian * 1953227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 1954227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 1955227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 1956227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 1957227398Sadrian * tracking array to maintain consistency. 1958227398Sadrian */ 1959227398Sadrianstatic void 1960227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 1961227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 1962227398Sadrian{ 1963227398Sadrian int index, cindex; 1964227398Sadrian struct ieee80211_tx_ampdu *tap; 1965227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 1966227398Sadrian 1967227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 1968227398Sadrian 1969227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 1970227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 1971227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 1972227398Sadrian 1973227398Sadrian /* 1974227398Sadrian * Just warn for now; if it happens then we should find out 1975227398Sadrian * about it. It's highly likely the aggregation session will 1976227398Sadrian * soon hang. 1977227398Sadrian */ 1978227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 1979227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 1980227398Sadrian " has mismatching seqno's, BA session may hang.\n", 1981227398Sadrian __func__); 1982227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 1983227398Sadrian __func__, 1984227398Sadrian old_bf->bf_state.bfs_seqno, 1985227398Sadrian new_bf->bf_state.bfs_seqno); 1986227398Sadrian } 1987227398Sadrian 1988227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 1989227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 1990227398Sadrian " has m BA session may hang.\n", 1991227398Sadrian __func__); 1992227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 1993227398Sadrian __func__, 1994227398Sadrian old_bf, new_bf); 1995227398Sadrian } 1996227398Sadrian 1997227398Sadrian tid->tx_buf[cindex] = new_bf; 1998227398Sadrian} 1999227398Sadrian 2000227398Sadrian/* 2001227364Sadrian * seq_start - left edge of BAW 2002227364Sadrian * seq_next - current/next sequence number to allocate 2003227364Sadrian * 2004227364Sadrian * Since the BAW status may be modified by both the ath task and 2005227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2006227364Sadrian */ 2007227364Sadrianstatic void 2008227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2009227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2010227364Sadrian{ 2011227364Sadrian int index, cindex; 2012227364Sadrian struct ieee80211_tx_ampdu *tap; 2013227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2014227364Sadrian 2015227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2016227364Sadrian 2017227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2018227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2019227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2020227364Sadrian 2021227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2022227364Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, baw head=%d, tail=%d\n", 2023227364Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2024227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2025227364Sadrian 2026227364Sadrian /* 2027227364Sadrian * If this occurs then we have a big problem - something else 2028227364Sadrian * has slid tap->txa_start along without updating the BAW 2029227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2030227364Sadrian * completely busted. 2031227364Sadrian * 2032227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2033227364Sadrian * it's quite possible that a cloned buffer is making its way 2034227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2035227364Sadrian */ 2036227364Sadrian if (tid->tx_buf[cindex] != bf) { 2037227364Sadrian device_printf(sc->sc_dev, 2038227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2039227364Sadrian __func__, 2040227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2041227364Sadrian tid->tx_buf[cindex], 2042227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2043227364Sadrian } 2044227364Sadrian 2045227364Sadrian tid->tx_buf[cindex] = NULL; 2046227364Sadrian 2047227364Sadrian while (tid->baw_head != tid->baw_tail && !tid->tx_buf[tid->baw_head]) { 2048227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2049227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2050227364Sadrian } 2051227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, "%s: baw is now %d:%d, baw head=%d\n", 2052227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2053227364Sadrian} 2054227364Sadrian 2055227364Sadrian/* 2056227364Sadrian * Mark the current node/TID as ready to TX. 2057227364Sadrian * 2058227364Sadrian * This is done to make it easy for the software scheduler to 2059227364Sadrian * find which nodes have data to send. 2060227364Sadrian * 2061227364Sadrian * The TXQ lock must be held. 2062227364Sadrian */ 2063227364Sadrianstatic void 2064227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2065227364Sadrian{ 2066227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2067227364Sadrian 2068227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2069227364Sadrian 2070227364Sadrian if (tid->paused) 2071227364Sadrian return; /* paused, can't schedule yet */ 2072227364Sadrian 2073227364Sadrian if (tid->sched) 2074227364Sadrian return; /* already scheduled */ 2075227364Sadrian 2076227364Sadrian tid->sched = 1; 2077227364Sadrian 2078227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2079227364Sadrian} 2080227364Sadrian 2081227364Sadrian/* 2082227364Sadrian * Mark the current node as no longer needing to be polled for 2083227364Sadrian * TX packets. 2084227364Sadrian * 2085227364Sadrian * The TXQ lock must be held. 2086227364Sadrian */ 2087227364Sadrianstatic void 2088227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2089227364Sadrian{ 2090227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2091227364Sadrian 2092227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2093227364Sadrian 2094227364Sadrian if (tid->sched == 0) 2095227364Sadrian return; 2096227364Sadrian 2097227364Sadrian tid->sched = 0; 2098227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2099227364Sadrian} 2100227364Sadrian 2101227364Sadrian/* 2102227364Sadrian * Assign a sequence number manually to the given frame. 2103227364Sadrian * 2104227364Sadrian * This should only be called for A-MPDU TX frames. 2105227364Sadrian */ 2106227364Sadrianstatic ieee80211_seq 2107227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2108227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2109227364Sadrian{ 2110227364Sadrian struct ieee80211_frame *wh; 2111227364Sadrian int tid, pri; 2112227364Sadrian ieee80211_seq seqno; 2113227364Sadrian uint8_t subtype; 2114227364Sadrian 2115227364Sadrian /* TID lookup */ 2116227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2117227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2118227364Sadrian tid = WME_AC_TO_TID(pri); 2119227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2120227364Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2121227364Sadrian 2122227364Sadrian /* XXX Is it a control frame? Ignore */ 2123227364Sadrian 2124227364Sadrian /* Does the packet require a sequence number? */ 2125227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2126227364Sadrian return -1; 2127227364Sadrian 2128227364Sadrian /* 2129227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2130227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2131227364Sadrian * 2132227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2133227364Sadrian * data frame sequence number in the aggregation state updates, so 2134227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2135227364Sadrian * RX side. 2136227364Sadrian */ 2137227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2138227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2139227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2140227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2141227364Sadrian } else { 2142227364Sadrian /* Manually assign sequence number */ 2143227364Sadrian seqno = ni->ni_txseqs[tid]; 2144227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2145227364Sadrian } 2146227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2147227364Sadrian M_SEQNO_SET(m0, seqno); 2148227364Sadrian 2149227364Sadrian /* Return so caller can do something with it if needed */ 2150227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2151227364Sadrian return seqno; 2152227364Sadrian} 2153227364Sadrian 2154227364Sadrian/* 2155227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2156227364Sadrian * If the frame is out of BAW, queue. 2157227364Sadrian * Otherwise, schedule it as a single frame. 2158227364Sadrian */ 2159227364Sadrianstatic void 2160227364Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, struct ath_buf *bf) 2161227364Sadrian{ 2162227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2163227364Sadrian struct ath_txq *txq = bf->bf_state.bfs_txq; 2164227364Sadrian struct ieee80211_tx_ampdu *tap; 2165227364Sadrian 2166227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2167227364Sadrian 2168227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2169227364Sadrian 2170227364Sadrian /* paused? queue */ 2171227364Sadrian if (tid->paused) { 2172227364Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2173227364Sadrian return; 2174227364Sadrian } 2175227364Sadrian 2176227364Sadrian /* outside baw? queue */ 2177227364Sadrian if (bf->bf_state.bfs_dobaw && 2178227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2179227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2180227364Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2181227364Sadrian ath_tx_tid_sched(sc, tid); 2182227364Sadrian return; 2183227364Sadrian } 2184227364Sadrian 2185227364Sadrian /* Direct dispatch to hardware */ 2186227364Sadrian ath_tx_do_ratelookup(sc, bf); 2187227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2188227364Sadrian ath_tx_set_rtscts(sc, bf); 2189227364Sadrian ath_tx_setds(sc, bf); 2190227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 2191227364Sadrian ath_tx_chaindesclist(sc, bf); 2192227364Sadrian 2193227364Sadrian /* Statistics */ 2194227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2195227364Sadrian 2196227364Sadrian /* Track per-TID hardware queue depth correctly */ 2197227364Sadrian tid->hwq_depth++; 2198227364Sadrian 2199227364Sadrian /* Add to BAW */ 2200227364Sadrian if (bf->bf_state.bfs_dobaw) { 2201227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2202227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2203227364Sadrian } 2204227364Sadrian 2205227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2206227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2207227364Sadrian 2208227364Sadrian /* Hand off to hardware */ 2209227364Sadrian ath_tx_handoff(sc, txq, bf); 2210227364Sadrian} 2211227364Sadrian 2212227364Sadrian/* 2213227364Sadrian * Attempt to send the packet. 2214227364Sadrian * If the queue isn't busy, direct-dispatch. 2215227364Sadrian * If the queue is busy enough, queue the given packet on the 2216227364Sadrian * relevant software queue. 2217227364Sadrian */ 2218227364Sadrianvoid 2219227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2220227364Sadrian struct ath_buf *bf) 2221227364Sadrian{ 2222227364Sadrian struct ath_node *an = ATH_NODE(ni); 2223227364Sadrian struct ieee80211_frame *wh; 2224227364Sadrian struct ath_tid *atid; 2225227364Sadrian int pri, tid; 2226227364Sadrian struct mbuf *m0 = bf->bf_m; 2227227364Sadrian 2228227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2229227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2230227364Sadrian pri = ath_tx_getac(sc, m0); 2231227364Sadrian tid = ath_tx_gettid(sc, m0); 2232227364Sadrian atid = &an->an_tid[tid]; 2233227364Sadrian 2234227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2235227364Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2236227364Sadrian 2237227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2238227364Sadrian bf->bf_state.bfs_tid = tid; 2239227364Sadrian bf->bf_state.bfs_txq = txq; 2240227364Sadrian bf->bf_state.bfs_pri = pri; 2241227364Sadrian 2242227364Sadrian /* 2243227364Sadrian * If the hardware queue isn't busy, queue it directly. 2244227364Sadrian * If the hardware queue is busy, queue it. 2245227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2246227364Sadrian * queue it. 2247227364Sadrian */ 2248227364Sadrian ATH_TXQ_LOCK(txq); 2249227364Sadrian if (atid->paused) { 2250227364Sadrian /* TID is paused, queue */ 2251227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2252227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2253227364Sadrian /* AMPDU pending; queue */ 2254227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2255227364Sadrian /* XXX sched? */ 2256227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2257227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2258227364Sadrian if (txq->axq_depth < sc->sc_hwq_limit) 2259227364Sadrian ath_tx_xmit_aggr(sc, an, bf); 2260227364Sadrian else { 2261227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2262227364Sadrian ath_tx_tid_sched(sc, atid); 2263227364Sadrian } 2264227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2265227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2266227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2267227364Sadrian } else { 2268227364Sadrian /* Busy; queue */ 2269227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2270227364Sadrian ath_tx_tid_sched(sc, atid); 2271227364Sadrian } 2272227364Sadrian ATH_TXQ_UNLOCK(txq); 2273227364Sadrian} 2274227364Sadrian 2275227364Sadrian/* 2276227364Sadrian * Do the basic frame setup stuff that's required before the frame 2277227364Sadrian * is added to a software queue. 2278227364Sadrian * 2279227364Sadrian * All frames get mostly the same treatment and it's done once. 2280227364Sadrian * Retransmits fiddle with things like the rate control setup, 2281227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2282227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2283227364Sadrian * 2284227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2285227364Sadrian * m0 may not be valid. 2286227364Sadrian */ 2287227364Sadrian 2288227364Sadrian 2289227364Sadrian/* 2290227364Sadrian * Configure the per-TID node state. 2291227364Sadrian * 2292227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2293227364Sadrian * else to put it just yet. 2294227364Sadrian * 2295227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2296227364Sadrian */ 2297227364Sadrianvoid 2298227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2299227364Sadrian{ 2300227364Sadrian int i, j; 2301227364Sadrian struct ath_tid *atid; 2302227364Sadrian 2303227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2304227364Sadrian atid = &an->an_tid[i]; 2305227364Sadrian TAILQ_INIT(&atid->axq_q); 2306227364Sadrian atid->tid = i; 2307227364Sadrian atid->an = an; 2308227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2309227364Sadrian atid->tx_buf[j] = NULL; 2310227364Sadrian atid->baw_head = atid->baw_tail = 0; 2311227364Sadrian atid->paused = 0; 2312227364Sadrian atid->sched = 0; 2313227364Sadrian atid->hwq_depth = 0; 2314227364Sadrian atid->cleanup_inprogress = 0; 2315227364Sadrian if (i == IEEE80211_NONQOS_TID) 2316227364Sadrian atid->ac = WME_AC_BE; 2317227364Sadrian else 2318227364Sadrian atid->ac = TID_TO_WME_AC(i); 2319227364Sadrian } 2320227364Sadrian} 2321227364Sadrian 2322227364Sadrian/* 2323227364Sadrian * Pause the current TID. This stops packets from being transmitted 2324227364Sadrian * on it. 2325227364Sadrian * 2326227364Sadrian * Since this is also called from upper layers as well as the driver, 2327227364Sadrian * it will get the TID lock. 2328227364Sadrian */ 2329227364Sadrianstatic void 2330227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2331227364Sadrian{ 2332227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2333227364Sadrian tid->paused++; 2334227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2335227364Sadrian __func__, tid->paused); 2336227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2337227364Sadrian} 2338227364Sadrian 2339227364Sadrian/* 2340227364Sadrian * Unpause the current TID, and schedule it if needed. 2341227364Sadrian */ 2342227364Sadrianstatic void 2343227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2344227364Sadrian{ 2345227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2346227364Sadrian 2347227364Sadrian tid->paused--; 2348227364Sadrian 2349227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2350227364Sadrian __func__, tid->paused); 2351227364Sadrian 2352227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2353227364Sadrian return; 2354227364Sadrian } 2355227364Sadrian 2356227364Sadrian ath_tx_tid_sched(sc, tid); 2357227364Sadrian /* Punt some frames to the hardware if needed */ 2358227364Sadrian ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2359227364Sadrian} 2360227364Sadrian 2361227364Sadrian/* 2362227364Sadrian * Free any packets currently pending in the software TX queue. 2363227364Sadrian * 2364227364Sadrian * This will be called when a node is being deleted. 2365227364Sadrian * 2366227364Sadrian * It can also be called on an active node during an interface 2367227364Sadrian * reset or state transition. 2368227364Sadrian * 2369227364Sadrian * (From Linux/reference): 2370227364Sadrian * 2371227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2372227364Sadrian * sequence number(s) without setting the retry bit. The 2373227364Sadrian * alternative is to give up on these and BAR the receiver's window 2374227364Sadrian * forward. 2375227364Sadrian */ 2376227364Sadrianstatic void 2377227364Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, struct ath_tid *tid, 2378227364Sadrian ath_bufhead *bf_cq) 2379227364Sadrian{ 2380227364Sadrian struct ath_buf *bf; 2381227364Sadrian struct ieee80211_tx_ampdu *tap; 2382227364Sadrian struct ieee80211_node *ni = &an->an_node; 2383227364Sadrian int t = 0; 2384227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2385227364Sadrian 2386227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2387227364Sadrian 2388227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2389227364Sadrian 2390227364Sadrian /* Walk the queue, free frames */ 2391227364Sadrian for (;;) { 2392227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2393227364Sadrian if (bf == NULL) { 2394227364Sadrian break; 2395227364Sadrian } 2396227364Sadrian 2397227364Sadrian if (t == 0) { 2398227364Sadrian device_printf(sc->sc_dev, 2399227364Sadrian "%s: node %p: tid %d: txq_depth=%d, " 2400227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2401227364Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, baw_tail=%d " 2402227364Sadrian "txa_start=%d, ni_txseqs=%d\n", 2403227364Sadrian __func__, ni, tid->tid, txq->axq_depth, 2404227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2405227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2406227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2407227364Sadrian ni->ni_txseqs[tid->tid]); 2408227364Sadrian t = 1; 2409227364Sadrian } 2410227364Sadrian 2411227364Sadrian 2412227364Sadrian /* 2413227364Sadrian * If the current TID is running AMPDU, update 2414227364Sadrian * the BAW. 2415227364Sadrian */ 2416227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 2417227364Sadrian bf->bf_state.bfs_dobaw) { 2418227364Sadrian /* 2419227364Sadrian * Only remove the frame from the BAW if it's 2420227364Sadrian * been transmitted at least once; this means 2421227364Sadrian * the frame was in the BAW to begin with. 2422227364Sadrian */ 2423227364Sadrian if (bf->bf_state.bfs_retries > 0) { 2424227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 2425227364Sadrian bf->bf_state.bfs_dobaw = 0; 2426227364Sadrian } 2427227364Sadrian /* 2428227364Sadrian * This has become a non-fatal error now 2429227364Sadrian */ 2430227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2431227364Sadrian device_printf(sc->sc_dev, 2432227364Sadrian "%s: wasn't added: seqno %d\n", 2433227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2434227364Sadrian } 2435227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 2436227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 2437227364Sadrian } 2438227364Sadrian 2439227364Sadrian /* 2440227364Sadrian * Now that it's completed, grab the TID lock and update 2441227364Sadrian * the sequence number and BAW window. 2442227364Sadrian * Because sequence numbers have been assigned to frames 2443227364Sadrian * that haven't been sent yet, it's entirely possible 2444227364Sadrian * we'll be called with some pending frames that have not 2445227364Sadrian * been transmitted. 2446227364Sadrian * 2447227364Sadrian * The cleaner solution is to do the sequence number allocation 2448227364Sadrian * when the packet is first transmitted - and thus the "retries" 2449227364Sadrian * check above would be enough to update the BAW/seqno. 2450227364Sadrian */ 2451227364Sadrian 2452227364Sadrian /* But don't do it for non-QoS TIDs */ 2453227364Sadrian if (tap) { 2454227364Sadrian#if 0 2455227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2456227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 2457227364Sadrian __func__, an, tid->tid, tap->txa_start); 2458227364Sadrian#endif 2459227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 2460227364Sadrian tid->baw_tail = tid->baw_head; 2461227364Sadrian } 2462227364Sadrian} 2463227364Sadrian 2464227364Sadrian/* 2465227364Sadrian * Flush all software queued packets for the given node. 2466227364Sadrian * 2467227364Sadrian * This occurs when a completion handler frees the last buffer 2468227364Sadrian * for a node, and the node is thus freed. This causes the node 2469227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 2470227364Sadrian */ 2471227364Sadrianvoid 2472227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 2473227364Sadrian{ 2474227364Sadrian int tid; 2475227364Sadrian ath_bufhead bf_cq; 2476227364Sadrian struct ath_buf *bf; 2477227364Sadrian 2478227364Sadrian TAILQ_INIT(&bf_cq); 2479227364Sadrian 2480227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 2481227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2482227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 2483227364Sadrian 2484227364Sadrian /* Remove this tid from the list of active tids */ 2485227364Sadrian ATH_TXQ_LOCK(txq); 2486227364Sadrian ath_tx_tid_unsched(sc, atid); 2487227364Sadrian 2488227364Sadrian /* Free packets */ 2489227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 2490227364Sadrian ATH_TXQ_UNLOCK(txq); 2491227364Sadrian } 2492227364Sadrian 2493227364Sadrian /* Handle completed frames */ 2494227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2495227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2496227364Sadrian ath_tx_default_comp(sc, bf, 0); 2497227364Sadrian } 2498227364Sadrian} 2499227364Sadrian 2500227364Sadrian/* 2501227364Sadrian * Drain all the software TXQs currently with traffic queued. 2502227364Sadrian */ 2503227364Sadrianvoid 2504227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 2505227364Sadrian{ 2506227364Sadrian struct ath_tid *tid; 2507227364Sadrian ath_bufhead bf_cq; 2508227364Sadrian struct ath_buf *bf; 2509227364Sadrian 2510227364Sadrian TAILQ_INIT(&bf_cq); 2511227364Sadrian ATH_TXQ_LOCK(txq); 2512227364Sadrian 2513227364Sadrian /* 2514227364Sadrian * Iterate over all active tids for the given txq, 2515227364Sadrian * flushing and unsched'ing them 2516227364Sadrian */ 2517227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 2518227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 2519227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 2520227364Sadrian ath_tx_tid_unsched(sc, tid); 2521227364Sadrian } 2522227364Sadrian 2523227364Sadrian ATH_TXQ_UNLOCK(txq); 2524227364Sadrian 2525227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2526227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2527227364Sadrian ath_tx_default_comp(sc, bf, 0); 2528227364Sadrian } 2529227364Sadrian} 2530227364Sadrian 2531227364Sadrian/* 2532227364Sadrian * Handle completion of non-aggregate session frames. 2533227364Sadrian */ 2534227364Sadrianvoid 2535227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 2536227364Sadrian{ 2537227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2538227364Sadrian struct ath_node *an = ATH_NODE(ni); 2539227364Sadrian int tid = bf->bf_state.bfs_tid; 2540227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2541227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 2542227364Sadrian 2543227364Sadrian /* The TID state is protected behind the TXQ lock */ 2544227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2545227364Sadrian 2546227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 2547227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 2548227364Sadrian 2549227364Sadrian atid->hwq_depth--; 2550227364Sadrian if (atid->hwq_depth < 0) 2551227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 2552227364Sadrian __func__, atid->hwq_depth); 2553227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2554227364Sadrian 2555227364Sadrian /* 2556227364Sadrian * punt to rate control if we're not being cleaned up 2557227364Sadrian * during a hw queue drain and the frame wanted an ACK. 2558227364Sadrian */ 2559227364Sadrian if (fail == 0 && ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0)) 2560227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 2561227364Sadrian ts, bf->bf_state.bfs_pktlen, 2562227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 2563227364Sadrian 2564227364Sadrian ath_tx_default_comp(sc, bf, fail); 2565227364Sadrian} 2566227364Sadrian 2567227364Sadrian/* 2568227364Sadrian * Handle cleanup of aggregate session packets that aren't 2569227364Sadrian * an A-MPDU. 2570227364Sadrian * 2571227364Sadrian * There's no need to update the BAW here - the session is being 2572227364Sadrian * torn down. 2573227364Sadrian */ 2574227364Sadrianstatic void 2575227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2576227364Sadrian{ 2577227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2578227364Sadrian struct ath_node *an = ATH_NODE(ni); 2579227364Sadrian int tid = bf->bf_state.bfs_tid; 2580227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2581227364Sadrian 2582227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 2583227364Sadrian __func__, tid, atid->incomp); 2584227364Sadrian 2585227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2586227364Sadrian atid->incomp--; 2587227364Sadrian if (atid->incomp == 0) { 2588227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2589227364Sadrian "%s: TID %d: cleaned up! resume!\n", 2590227364Sadrian __func__, tid); 2591227364Sadrian atid->cleanup_inprogress = 0; 2592227364Sadrian ath_tx_tid_resume(sc, atid); 2593227364Sadrian } 2594227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2595227364Sadrian 2596227364Sadrian ath_tx_default_comp(sc, bf, 0); 2597227364Sadrian} 2598227364Sadrian 2599227364Sadrian/* 2600227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 2601227364Sadrian * unaggregated. 2602227364Sadrian * 2603227364Sadrian * - Discard all retry frames from the s/w queue. 2604227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 2605227364Sadrian * - Count the number of unacked frames, and let transmit completion 2606227364Sadrian * handle it later. 2607227364Sadrian * 2608227364Sadrian * The caller is responsible for pausing the TID. 2609227364Sadrian */ 2610227364Sadrianstatic void 2611227364Sadrianath_tx_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 2612227364Sadrian{ 2613227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2614227364Sadrian struct ieee80211_tx_ampdu *tap; 2615227364Sadrian struct ath_buf *bf, *bf_next; 2616227364Sadrian ath_bufhead bf_cq; 2617227364Sadrian 2618227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2619227364Sadrian "%s: TID %d: called\n", __func__, tid); 2620227364Sadrian 2621227364Sadrian TAILQ_INIT(&bf_cq); 2622227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2623227364Sadrian 2624227364Sadrian /* 2625227364Sadrian * Update the frames in the software TX queue: 2626227364Sadrian * 2627227364Sadrian * + Discard retry frames in the queue 2628227364Sadrian * + Fix the completion function to be non-aggregate 2629227364Sadrian */ 2630227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2631227364Sadrian while (bf) { 2632227364Sadrian if (bf->bf_state.bfs_isretried) { 2633227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 2634227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 2635227364Sadrian atid->axq_depth--; 2636227364Sadrian if (bf->bf_state.bfs_dobaw) { 2637227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2638227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2639227364Sadrian device_printf(sc->sc_dev, 2640227364Sadrian "%s: wasn't added: seqno %d\n", 2641227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2642227364Sadrian } 2643227364Sadrian bf->bf_state.bfs_dobaw = 0; 2644227364Sadrian /* 2645227364Sadrian * Call the default completion handler with "fail" just 2646227364Sadrian * so upper levels are suitably notified about this. 2647227364Sadrian */ 2648227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 2649227364Sadrian bf = bf_next; 2650227364Sadrian continue; 2651227364Sadrian } 2652227364Sadrian /* Give these the default completion handler */ 2653227364Sadrian bf->bf_comp = ath_tx_normal_comp; 2654227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 2655227364Sadrian } 2656227364Sadrian 2657227364Sadrian /* The caller is required to pause the TID */ 2658227364Sadrian#if 0 2659227364Sadrian /* Pause the TID */ 2660227364Sadrian ath_tx_tid_pause(sc, atid); 2661227364Sadrian#endif 2662227364Sadrian 2663227364Sadrian /* 2664227364Sadrian * Calculate what hardware-queued frames exist based 2665227364Sadrian * on the current BAW size. Ie, what frames have been 2666227364Sadrian * added to the TX hardware queue for this TID but 2667227364Sadrian * not yet ACKed. 2668227364Sadrian */ 2669227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 2670227364Sadrian /* Need the lock - fiddling with BAW */ 2671227364Sadrian while (atid->baw_head != atid->baw_tail) { 2672227364Sadrian if (atid->tx_buf[atid->baw_head]) { 2673227364Sadrian atid->incomp++; 2674227364Sadrian atid->cleanup_inprogress = 1; 2675227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 2676227364Sadrian } 2677227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 2678227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2679227364Sadrian } 2680227364Sadrian 2681227364Sadrian /* 2682227364Sadrian * If cleanup is required, defer TID scheduling 2683227364Sadrian * until all the HW queued packets have been 2684227364Sadrian * sent. 2685227364Sadrian */ 2686227364Sadrian if (! atid->cleanup_inprogress) 2687227364Sadrian ath_tx_tid_resume(sc, atid); 2688227364Sadrian 2689227364Sadrian if (atid->cleanup_inprogress) 2690227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2691227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 2692227364Sadrian __func__, tid, atid->incomp); 2693227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2694227364Sadrian 2695227364Sadrian /* Handle completing frames and fail them */ 2696227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2697227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2698227364Sadrian ath_tx_default_comp(sc, bf, 1); 2699227364Sadrian } 2700227364Sadrian} 2701227364Sadrian 2702227364Sadrianstatic void 2703227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 2704227364Sadrian{ 2705227364Sadrian struct ieee80211_frame *wh; 2706227364Sadrian 2707227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 2708227364Sadrian /* Only update/resync if needed */ 2709227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 2710227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 2711227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 2712227364Sadrian BUS_DMASYNC_PREWRITE); 2713227364Sadrian } 2714227364Sadrian sc->sc_stats.ast_tx_swretries++; 2715227364Sadrian bf->bf_state.bfs_isretried = 1; 2716227364Sadrian bf->bf_state.bfs_retries ++; 2717227364Sadrian} 2718227364Sadrian 2719227364Sadrianstatic struct ath_buf * 2720227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 2721227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 2722227364Sadrian{ 2723227364Sadrian struct ath_buf *nbf; 2724227364Sadrian int error; 2725227364Sadrian 2726227364Sadrian nbf = ath_buf_clone(sc, bf); 2727227364Sadrian 2728227364Sadrian#if 0 2729227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 2730227364Sadrian __func__); 2731227364Sadrian#endif 2732227364Sadrian 2733227364Sadrian if (nbf == NULL) { 2734227364Sadrian /* Failed to clone */ 2735227364Sadrian device_printf(sc->sc_dev, 2736227364Sadrian "%s: failed to clone a busy buffer\n", 2737227364Sadrian __func__); 2738227364Sadrian return NULL; 2739227364Sadrian } 2740227364Sadrian 2741227364Sadrian /* Setup the dma for the new buffer */ 2742227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 2743227364Sadrian if (error != 0) { 2744227364Sadrian device_printf(sc->sc_dev, 2745227364Sadrian "%s: failed to setup dma for clone\n", 2746227364Sadrian __func__); 2747227364Sadrian /* 2748227364Sadrian * Put this at the head of the list, not tail; 2749227364Sadrian * that way it doesn't interfere with the 2750227364Sadrian * busy buffer logic (which uses the tail of 2751227364Sadrian * the list.) 2752227364Sadrian */ 2753227364Sadrian ATH_TXBUF_LOCK(sc); 2754227364Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, nbf, bf_list); 2755227364Sadrian ATH_TXBUF_UNLOCK(sc); 2756227364Sadrian return NULL; 2757227364Sadrian } 2758227364Sadrian 2759227398Sadrian /* Update BAW if required, before we free the original buf */ 2760227398Sadrian if (bf->bf_state.bfs_dobaw) 2761227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 2762227398Sadrian 2763227364Sadrian /* Free current buffer; return the older buffer */ 2764227364Sadrian bf->bf_m = NULL; 2765227364Sadrian bf->bf_node = NULL; 2766227364Sadrian ath_freebuf(sc, bf); 2767227364Sadrian return nbf; 2768227364Sadrian} 2769227364Sadrian 2770227364Sadrian/* 2771227364Sadrian * Handle retrying an unaggregate frame in an aggregate 2772227364Sadrian * session. 2773227364Sadrian * 2774227364Sadrian * If too many retries occur, pause the TID, wait for 2775227364Sadrian * any further retransmits (as there's no reason why 2776227364Sadrian * non-aggregate frames in an aggregate session are 2777227364Sadrian * transmitted in-order; they just have to be in-BAW) 2778227364Sadrian * and then queue a BAR. 2779227364Sadrian */ 2780227364Sadrianstatic void 2781227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2782227364Sadrian{ 2783227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2784227364Sadrian struct ath_node *an = ATH_NODE(ni); 2785227364Sadrian int tid = bf->bf_state.bfs_tid; 2786227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2787227364Sadrian struct ieee80211_tx_ampdu *tap; 2788227364Sadrian int txseq; 2789227364Sadrian 2790227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2791227364Sadrian 2792227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 2793227364Sadrian 2794227364Sadrian /* 2795227364Sadrian * If the buffer is marked as busy, we can't directly 2796227364Sadrian * reuse it. Instead, try to clone the buffer. 2797227364Sadrian * If the clone is successful, recycle the old buffer. 2798227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 2799227364Sadrian * to force the next bit of code to free the buffer 2800227364Sadrian * for us. 2801227364Sadrian */ 2802227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 2803227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 2804227364Sadrian struct ath_buf *nbf; 2805227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 2806227364Sadrian if (nbf) 2807227364Sadrian /* bf has been freed at this point */ 2808227364Sadrian bf = nbf; 2809227364Sadrian else 2810227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 2811227364Sadrian } 2812227364Sadrian 2813227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 2814227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 2815227364Sadrian "%s: exceeded retries; seqno %d\n", 2816227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2817227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 2818227364Sadrian 2819227364Sadrian /* Update BAW anyway */ 2820227364Sadrian if (bf->bf_state.bfs_dobaw) { 2821227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2822227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2823227364Sadrian device_printf(sc->sc_dev, 2824227364Sadrian "%s: wasn't added: seqno %d\n", 2825227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2826227364Sadrian } 2827227364Sadrian bf->bf_state.bfs_dobaw = 0; 2828227364Sadrian 2829227364Sadrian /* Send BAR frame */ 2830227364Sadrian /* 2831227364Sadrian * This'll end up going into net80211 and back out 2832227364Sadrian * again, via ic->ic_raw_xmit(). 2833227364Sadrian */ 2834227364Sadrian txseq = tap->txa_start; 2835227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2836227364Sadrian 2837227364Sadrian device_printf(sc->sc_dev, 2838227364Sadrian "%s: TID %d: send BAR; seq %d\n", __func__, tid, txseq); 2839227364Sadrian 2840227364Sadrian /* XXX TODO: send BAR */ 2841227364Sadrian 2842227364Sadrian /* Free buffer, bf is free after this call */ 2843227364Sadrian ath_tx_default_comp(sc, bf, 0); 2844227364Sadrian return; 2845227364Sadrian } 2846227364Sadrian 2847227364Sadrian /* 2848227364Sadrian * This increments the retry counter as well as 2849227364Sadrian * sets the retry flag in the ath_buf and packet 2850227364Sadrian * body. 2851227364Sadrian */ 2852227364Sadrian ath_tx_set_retry(sc, bf); 2853227364Sadrian 2854227364Sadrian /* 2855227364Sadrian * Insert this at the head of the queue, so it's 2856227364Sadrian * retried before any current/subsequent frames. 2857227364Sadrian */ 2858227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 2859227364Sadrian ath_tx_tid_sched(sc, atid); 2860227364Sadrian 2861227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2862227364Sadrian} 2863227364Sadrian 2864227364Sadrian/* 2865227364Sadrian * Common code for aggregate excessive retry/subframe retry. 2866227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 2867227364Sadrian * buffers. 2868227364Sadrian * 2869227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 2870227364Sadrian */ 2871227364Sadrianstatic int 2872227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 2873227364Sadrian ath_bufhead *bf_q) 2874227364Sadrian{ 2875227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2876227364Sadrian struct ath_node *an = ATH_NODE(ni); 2877227364Sadrian int tid = bf->bf_state.bfs_tid; 2878227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2879227364Sadrian 2880227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 2881227364Sadrian 2882227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 2883227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 2884227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 2885227364Sadrian 2886227364Sadrian /* 2887227364Sadrian * If the buffer is marked as busy, we can't directly 2888227364Sadrian * reuse it. Instead, try to clone the buffer. 2889227364Sadrian * If the clone is successful, recycle the old buffer. 2890227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 2891227364Sadrian * to force the next bit of code to free the buffer 2892227364Sadrian * for us. 2893227364Sadrian */ 2894227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 2895227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 2896227364Sadrian struct ath_buf *nbf; 2897227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 2898227364Sadrian if (nbf) 2899227364Sadrian /* bf has been freed at this point */ 2900227364Sadrian bf = nbf; 2901227364Sadrian else 2902227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 2903227364Sadrian } 2904227364Sadrian 2905227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 2906227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 2907227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 2908227364Sadrian "%s: max retries: seqno %d\n", 2909227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2910227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2911227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2912227364Sadrian device_printf(sc->sc_dev, 2913227364Sadrian "%s: wasn't added: seqno %d\n", 2914227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2915227364Sadrian bf->bf_state.bfs_dobaw = 0; 2916227364Sadrian return 1; 2917227364Sadrian } 2918227364Sadrian 2919227364Sadrian ath_tx_set_retry(sc, bf); 2920227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 2921227364Sadrian 2922227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 2923227364Sadrian return 0; 2924227364Sadrian} 2925227364Sadrian 2926227364Sadrian/* 2927227364Sadrian * error pkt completion for an aggregate destination 2928227364Sadrian */ 2929227364Sadrianstatic void 2930227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 2931227364Sadrian struct ath_tid *tid) 2932227364Sadrian{ 2933227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 2934227364Sadrian struct ath_node *an = ATH_NODE(ni); 2935227364Sadrian struct ath_buf *bf_next, *bf; 2936227364Sadrian ath_bufhead bf_q; 2937227364Sadrian int drops = 0; 2938227364Sadrian struct ieee80211_tx_ampdu *tap; 2939227364Sadrian ath_bufhead bf_cq; 2940227364Sadrian 2941227364Sadrian TAILQ_INIT(&bf_q); 2942227364Sadrian TAILQ_INIT(&bf_cq); 2943227364Sadrian 2944227364Sadrian /* 2945227364Sadrian * Update rate control - all frames have failed. 2946227364Sadrian * 2947227364Sadrian * XXX use the length in the first frame in the series; 2948227364Sadrian * XXX just so things are consistent for now. 2949227364Sadrian */ 2950227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 2951227364Sadrian &bf_first->bf_status.ds_txstat, 2952227364Sadrian bf_first->bf_state.bfs_pktlen, 2953227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 2954227364Sadrian 2955227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2956227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2957227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 2958227364Sadrian 2959227364Sadrian /* Retry all subframes */ 2960227364Sadrian bf = bf_first; 2961227364Sadrian while (bf) { 2962227364Sadrian bf_next = bf->bf_next; 2963227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 2964227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 2965227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 2966227364Sadrian drops++; 2967227364Sadrian bf->bf_next = NULL; 2968227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 2969227364Sadrian } 2970227364Sadrian bf = bf_next; 2971227364Sadrian } 2972227364Sadrian 2973227364Sadrian /* Prepend all frames to the beginning of the queue */ 2974227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 2975227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 2976227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2977227364Sadrian } 2978227364Sadrian 2979227364Sadrian ath_tx_tid_sched(sc, tid); 2980227364Sadrian 2981227364Sadrian /* 2982227364Sadrian * send bar if we dropped any frames 2983227364Sadrian * 2984227364Sadrian * Keep the txq lock held for now, as we need to ensure 2985227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 2986227364Sadrian * in the ifnet TX context or raw TX context.) 2987227364Sadrian */ 2988227364Sadrian if (drops) { 2989227364Sadrian int txseq = tap->txa_start; 2990227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2991227364Sadrian device_printf(sc->sc_dev, 2992227364Sadrian "%s: TID %d: send BAR; seq %d\n", 2993227364Sadrian __func__, tid->tid, txseq); 2994227364Sadrian 2995227364Sadrian /* XXX TODO: send BAR */ 2996227364Sadrian } else { 2997227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2998227364Sadrian } 2999227364Sadrian 3000227364Sadrian /* Complete frames which errored out */ 3001227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3002227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3003227364Sadrian ath_tx_default_comp(sc, bf, 0); 3004227364Sadrian } 3005227364Sadrian} 3006227364Sadrian 3007227364Sadrian/* 3008227364Sadrian * Handle clean-up of packets from an aggregate list. 3009227364Sadrian * 3010227364Sadrian * There's no need to update the BAW here - the session is being 3011227364Sadrian * torn down. 3012227364Sadrian */ 3013227364Sadrianstatic void 3014227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3015227364Sadrian{ 3016227364Sadrian struct ath_buf *bf, *bf_next; 3017227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3018227364Sadrian struct ath_node *an = ATH_NODE(ni); 3019227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3020227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3021227364Sadrian 3022227364Sadrian bf = bf_first; 3023227364Sadrian 3024227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3025227364Sadrian 3026227364Sadrian /* update incomp */ 3027227364Sadrian while (bf) { 3028227364Sadrian atid->incomp--; 3029227364Sadrian bf = bf->bf_next; 3030227364Sadrian } 3031227364Sadrian 3032227364Sadrian if (atid->incomp == 0) { 3033227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3034227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3035227364Sadrian __func__, tid); 3036227364Sadrian atid->cleanup_inprogress = 0; 3037227364Sadrian ath_tx_tid_resume(sc, atid); 3038227364Sadrian } 3039227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3040227364Sadrian 3041227364Sadrian /* Handle frame completion */ 3042227364Sadrian while (bf) { 3043227364Sadrian bf_next = bf->bf_next; 3044227364Sadrian ath_tx_default_comp(sc, bf, 1); 3045227364Sadrian bf = bf_next; 3046227364Sadrian } 3047227364Sadrian} 3048227364Sadrian 3049227364Sadrian/* 3050227364Sadrian * Handle completion of an set of aggregate frames. 3051227364Sadrian * 3052227364Sadrian * XXX for now, simply complete each sub-frame. 3053227364Sadrian * 3054227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3055227364Sadrian * not the last descriptor in the first frame. 3056227364Sadrian */ 3057227364Sadrianstatic void 3058227364Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, int fail) 3059227364Sadrian{ 3060227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3061227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3062227364Sadrian struct ath_node *an = ATH_NODE(ni); 3063227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3064227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3065227364Sadrian struct ath_tx_status ts; 3066227364Sadrian struct ieee80211_tx_ampdu *tap; 3067227364Sadrian ath_bufhead bf_q; 3068227364Sadrian ath_bufhead bf_cq; 3069227364Sadrian int seq_st, tx_ok; 3070227364Sadrian int hasba, isaggr; 3071227364Sadrian uint32_t ba[2]; 3072227364Sadrian struct ath_buf *bf, *bf_next; 3073227364Sadrian int ba_index; 3074227364Sadrian int drops = 0; 3075227364Sadrian int nframes = 0, nbad = 0, nf; 3076227364Sadrian int pktlen; 3077227364Sadrian /* XXX there's too much on the stack? */ 3078227364Sadrian struct ath_rc_series rc[4]; 3079227364Sadrian int txseq; 3080227364Sadrian 3081227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3082227364Sadrian __func__, atid->hwq_depth); 3083227364Sadrian 3084227364Sadrian /* The TID state is kept behind the TXQ lock */ 3085227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3086227364Sadrian 3087227364Sadrian atid->hwq_depth--; 3088227364Sadrian if (atid->hwq_depth < 0) 3089227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3090227364Sadrian __func__, atid->hwq_depth); 3091227364Sadrian 3092227364Sadrian /* 3093227364Sadrian * Punt cleanup to the relevant function, not our problem now 3094227364Sadrian */ 3095227364Sadrian if (atid->cleanup_inprogress) { 3096227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3097227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3098227364Sadrian return; 3099227364Sadrian } 3100227364Sadrian 3101227364Sadrian /* 3102227364Sadrian * Take a copy; this may be needed -after- bf_first 3103227364Sadrian * has been completed and freed. 3104227364Sadrian */ 3105227364Sadrian ts = bf_first->bf_status.ds_txstat; 3106227364Sadrian /* 3107227364Sadrian * XXX for now, use the first frame in the aggregate for 3108227364Sadrian * XXX rate control completion; it's at least consistent. 3109227364Sadrian */ 3110227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3111227364Sadrian 3112227364Sadrian /* 3113227364Sadrian * handle errors first 3114227364Sadrian */ 3115227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3116227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3117227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3118227364Sadrian return; 3119227364Sadrian } 3120227364Sadrian 3121227364Sadrian TAILQ_INIT(&bf_q); 3122227364Sadrian TAILQ_INIT(&bf_cq); 3123227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3124227364Sadrian 3125227364Sadrian /* 3126227364Sadrian * extract starting sequence and block-ack bitmap 3127227364Sadrian */ 3128227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3129227364Sadrian seq_st = ts.ts_seqnum; 3130227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3131227364Sadrian tx_ok = (ts.ts_status == 0); 3132227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3133227364Sadrian ba[0] = ts.ts_ba_low; 3134227364Sadrian ba[1] = ts.ts_ba_high; 3135227364Sadrian 3136227364Sadrian /* 3137227364Sadrian * Copy the TX completion status and the rate control 3138227364Sadrian * series from the first descriptor, as it may be freed 3139227364Sadrian * before the rate control code can get its grubby fingers 3140227364Sadrian * into things. 3141227364Sadrian */ 3142227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3143227364Sadrian 3144227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3145227364Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3146227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3147227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3148227364Sadrian 3149227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3150227364Sadrian if (tid != ts.ts_tid) { 3151227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3152227364Sadrian __func__, tid, ts.ts_tid); 3153227364Sadrian tx_ok = 0; 3154227364Sadrian } 3155227364Sadrian 3156227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3157227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3158227364Sadrian device_printf(sc->sc_dev, 3159227364Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, seq_st=%d\n", 3160227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3161227364Sadrian /* XXX TODO: schedule an interface reset */ 3162227364Sadrian } 3163227364Sadrian 3164227364Sadrian /* 3165227364Sadrian * Walk the list of frames, figure out which ones were correctly 3166227364Sadrian * sent and which weren't. 3167227364Sadrian */ 3168227364Sadrian bf = bf_first; 3169227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3170227364Sadrian 3171227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3172227364Sadrian bf_first = NULL; 3173227364Sadrian 3174227364Sadrian /* 3175227364Sadrian * Walk the list of completed frames and determine 3176227364Sadrian * which need to be completed and which need to be 3177227364Sadrian * retransmitted. 3178227364Sadrian * 3179227364Sadrian * For completed frames, the completion functions need 3180227364Sadrian * to be called at the end of this function as the last 3181227364Sadrian * node reference may free the node. 3182227364Sadrian * 3183227364Sadrian * Finally, since the TXQ lock can't be held during the 3184227364Sadrian * completion callback (to avoid lock recursion), 3185227364Sadrian * the completion calls have to be done outside of the 3186227364Sadrian * lock. 3187227364Sadrian */ 3188227364Sadrian while (bf) { 3189227364Sadrian nframes++; 3190227364Sadrian ba_index = ATH_BA_INDEX(seq_st, SEQNO(bf->bf_state.bfs_seqno)); 3191227364Sadrian bf_next = bf->bf_next; 3192227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3193227364Sadrian 3194227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3195227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3196227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3197227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3198227364Sadrian 3199227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3200227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 3201227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3202227364Sadrian bf->bf_state.bfs_dobaw = 0; 3203227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3204227364Sadrian device_printf(sc->sc_dev, 3205227364Sadrian "%s: wasn't added: seqno %d\n", 3206227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3207227364Sadrian bf->bf_next = NULL; 3208227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3209227364Sadrian } else { 3210227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3211227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3212227364Sadrian drops++; 3213227364Sadrian bf->bf_next = NULL; 3214227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3215227364Sadrian } 3216227364Sadrian nbad++; 3217227364Sadrian } 3218227364Sadrian bf = bf_next; 3219227364Sadrian } 3220227364Sadrian 3221227364Sadrian /* 3222227364Sadrian * Now that the BAW updates have been done, unlock 3223227364Sadrian * 3224227364Sadrian * txseq is grabbed before the lock is released so we 3225227364Sadrian * have a consistent view of what -was- in the BAW. 3226227364Sadrian * Anything after this point will not yet have been 3227227364Sadrian * TXed. 3228227364Sadrian */ 3229227364Sadrian txseq = tap->txa_start; 3230227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3231227364Sadrian 3232227364Sadrian if (nframes != nf) 3233227364Sadrian device_printf(sc->sc_dev, 3234227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3235227364Sadrian __func__, nframes, nf); 3236227364Sadrian 3237227364Sadrian /* 3238227364Sadrian * Now we know how many frames were bad, call the rate 3239227364Sadrian * control code. 3240227364Sadrian */ 3241227364Sadrian if (fail == 0) 3242227364Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, nbad); 3243227364Sadrian 3244227364Sadrian /* 3245227364Sadrian * send bar if we dropped any frames 3246227364Sadrian */ 3247227364Sadrian if (drops) { 3248227364Sadrian device_printf(sc->sc_dev, 3249227364Sadrian "%s: TID %d: send BAR; seq %d\n", __func__, tid, txseq); 3250227364Sadrian /* XXX TODO: send BAR */ 3251227364Sadrian } 3252227364Sadrian 3253227364Sadrian /* Prepend all frames to the beginning of the queue */ 3254227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3255227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3256227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3257227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3258227364Sadrian } 3259227364Sadrian ath_tx_tid_sched(sc, atid); 3260227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3261227364Sadrian 3262227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3263227364Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3264227364Sadrian 3265227364Sadrian /* Do deferred completion */ 3266227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3267227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3268227364Sadrian ath_tx_default_comp(sc, bf, 0); 3269227364Sadrian } 3270227364Sadrian} 3271227364Sadrian 3272227364Sadrian/* 3273227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3274227364Sadrian * session. 3275227364Sadrian * 3276227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3277227364Sadrian * ath_tx_draintxq(). 3278227364Sadrian */ 3279227364Sadrianstatic void 3280227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3281227364Sadrian{ 3282227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3283227364Sadrian struct ath_node *an = ATH_NODE(ni); 3284227364Sadrian int tid = bf->bf_state.bfs_tid; 3285227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3286227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3287227364Sadrian 3288227364Sadrian /* 3289227364Sadrian * Update rate control status here, before we possibly 3290227364Sadrian * punt to retry or cleanup. 3291227364Sadrian * 3292227364Sadrian * Do it outside of the TXQ lock. 3293227364Sadrian */ 3294227364Sadrian if (fail == 0 && ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0)) 3295227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3296227364Sadrian &bf->bf_status.ds_txstat, 3297227364Sadrian bf->bf_state.bfs_pktlen, 3298227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3299227364Sadrian 3300227364Sadrian /* 3301227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3302227364Sadrian * This unfortunately means that it's released and regrabbed 3303227364Sadrian * during retry and cleanup. That's rather inefficient. 3304227364Sadrian */ 3305227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3306227364Sadrian 3307227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3308227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3309227364Sadrian 3310227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: tid=%d, hwq_depth=%d\n", 3311227364Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth); 3312227364Sadrian 3313227364Sadrian atid->hwq_depth--; 3314227364Sadrian if (atid->hwq_depth < 0) 3315227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3316227364Sadrian __func__, atid->hwq_depth); 3317227364Sadrian 3318227364Sadrian /* 3319227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3320227364Sadrian * rather than handling it here. It's thus their 3321227364Sadrian * responsibility to clean up, call the completion 3322227364Sadrian * function in net80211, etc. 3323227364Sadrian */ 3324227364Sadrian if (atid->cleanup_inprogress) { 3325227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3326227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3327227364Sadrian return; 3328227364Sadrian } 3329227364Sadrian 3330227364Sadrian /* 3331227364Sadrian * Don't bother with the retry check if all frames 3332227364Sadrian * are being failed (eg during queue deletion.) 3333227364Sadrian */ 3334227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3335227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3336227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3337227364Sadrian return; 3338227364Sadrian } 3339227364Sadrian 3340227364Sadrian /* Success? Complete */ 3341227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3342227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3343227364Sadrian if (bf->bf_state.bfs_dobaw) { 3344227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3345227364Sadrian bf->bf_state.bfs_dobaw = 0; 3346227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3347227364Sadrian device_printf(sc->sc_dev, 3348227364Sadrian "%s: wasn't added: seqno %d\n", 3349227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3350227364Sadrian } 3351227364Sadrian 3352227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3353227364Sadrian 3354227364Sadrian ath_tx_default_comp(sc, bf, fail); 3355227364Sadrian /* bf is freed at this point */ 3356227364Sadrian} 3357227364Sadrian 3358227364Sadrianvoid 3359227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3360227364Sadrian{ 3361227364Sadrian if (bf->bf_state.bfs_aggr) 3362227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 3363227364Sadrian else 3364227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 3365227364Sadrian} 3366227364Sadrian 3367227364Sadrian/* 3368227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3369227364Sadrian * 3370227364Sadrian * This is the aggregate version. 3371227364Sadrian */ 3372227364Sadrianvoid 3373227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 3374227364Sadrian struct ath_tid *tid) 3375227364Sadrian{ 3376227364Sadrian struct ath_buf *bf; 3377227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3378227364Sadrian struct ieee80211_tx_ampdu *tap; 3379227364Sadrian struct ieee80211_node *ni = &an->an_node; 3380227364Sadrian ATH_AGGR_STATUS status; 3381227364Sadrian ath_bufhead bf_q; 3382227364Sadrian 3383227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 3384227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3385227364Sadrian 3386227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3387227364Sadrian 3388227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 3389227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 3390227364Sadrian __func__); 3391227364Sadrian 3392227364Sadrian for (;;) { 3393227364Sadrian status = ATH_AGGR_DONE; 3394227364Sadrian 3395227364Sadrian /* 3396227364Sadrian * If the upper layer has paused the TID, don't 3397227364Sadrian * queue any further packets. 3398227364Sadrian * 3399227364Sadrian * This can also occur from the completion task because 3400227364Sadrian * of packet loss; but as its serialised with this code, 3401227364Sadrian * it won't "appear" half way through queuing packets. 3402227364Sadrian */ 3403227364Sadrian if (tid->paused) 3404227364Sadrian break; 3405227364Sadrian 3406227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3407227364Sadrian if (bf == NULL) { 3408227364Sadrian break; 3409227364Sadrian } 3410227364Sadrian 3411227364Sadrian /* 3412227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 3413227364Sadrian * data frame), schedule it directly; continue. 3414227364Sadrian */ 3415227364Sadrian if (! bf->bf_state.bfs_dobaw) { 3416227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: non-baw packet\n", 3417227364Sadrian __func__); 3418227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3419227364Sadrian bf->bf_state.bfs_aggr = 0; 3420227364Sadrian ath_tx_do_ratelookup(sc, bf); 3421227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3422227364Sadrian ath_tx_set_rtscts(sc, bf); 3423227364Sadrian ath_tx_setds(sc, bf); 3424227364Sadrian ath_tx_chaindesclist(sc, bf); 3425227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3426227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3427227364Sadrian 3428227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 3429227364Sadrian 3430227364Sadrian /* Queue the packet; continue */ 3431227364Sadrian goto queuepkt; 3432227364Sadrian } 3433227364Sadrian 3434227364Sadrian TAILQ_INIT(&bf_q); 3435227364Sadrian 3436227364Sadrian /* 3437227364Sadrian * Do a rate control lookup on the first frame in the 3438227364Sadrian * list. The rate control code needs that to occur 3439227364Sadrian * before it can determine whether to TX. 3440227364Sadrian * It's inaccurate because the rate control code doesn't 3441227364Sadrian * really "do" aggregate lookups, so it only considers 3442227364Sadrian * the size of the first frame. 3443227364Sadrian */ 3444227364Sadrian ath_tx_do_ratelookup(sc, bf); 3445227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 3446227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 3447227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3448227364Sadrian 3449227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 3450227364Sadrian 3451227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3452227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 3453227364Sadrian 3454227364Sadrian /* 3455227364Sadrian * No frames to be picked up - out of BAW 3456227364Sadrian */ 3457227364Sadrian if (TAILQ_EMPTY(&bf_q)) 3458227364Sadrian break; 3459227364Sadrian 3460227364Sadrian /* 3461227364Sadrian * This assumes that the descriptor list in the ath_bufhead 3462227364Sadrian * are already linked together via bf_next pointers. 3463227364Sadrian */ 3464227364Sadrian bf = TAILQ_FIRST(&bf_q); 3465227364Sadrian 3466227364Sadrian /* 3467227364Sadrian * If it's the only frame send as non-aggregate 3468227364Sadrian * assume that ath_tx_form_aggr() has checked 3469227364Sadrian * whether it's in the BAW and added it appropriately. 3470227364Sadrian */ 3471227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 3472227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3473227364Sadrian "%s: single-frame aggregate\n", __func__); 3474227364Sadrian bf->bf_state.bfs_aggr = 0; 3475227364Sadrian ath_tx_set_rtscts(sc, bf); 3476227364Sadrian ath_tx_setds(sc, bf); 3477227364Sadrian ath_tx_chaindesclist(sc, bf); 3478227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3479227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3480227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 3481227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 3482227364Sadrian else 3483227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 3484227364Sadrian } else { 3485227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3486227364Sadrian "%s: multi-frame aggregate: %d frames, length %d\n", 3487227364Sadrian __func__, bf->bf_state.bfs_nframes, 3488227364Sadrian bf->bf_state.bfs_al); 3489227364Sadrian bf->bf_state.bfs_aggr = 1; 3490227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 3491227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 3492227364Sadrian 3493227364Sadrian /* 3494227364Sadrian * Update the rate and rtscts information based on the 3495227364Sadrian * rate decision made by the rate control code; 3496227364Sadrian * the first frame in the aggregate needs it. 3497227364Sadrian */ 3498227364Sadrian ath_tx_set_rtscts(sc, bf); 3499227364Sadrian 3500227364Sadrian /* 3501227364Sadrian * Setup the relevant descriptor fields 3502227364Sadrian * for aggregation. The first descriptor 3503227364Sadrian * already points to the rest in the chain. 3504227364Sadrian */ 3505227364Sadrian ath_tx_setds_11n(sc, bf); 3506227364Sadrian 3507227364Sadrian /* 3508227364Sadrian * setup first desc with rate and aggr info 3509227364Sadrian */ 3510227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3511227364Sadrian } 3512227364Sadrian queuepkt: 3513227364Sadrian //txq = bf->bf_state.bfs_txq; 3514227364Sadrian 3515227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 3516227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 3517227364Sadrian 3518227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 3519227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 3520227364Sadrian 3521227364Sadrian /* Punt to txq */ 3522227364Sadrian ath_tx_handoff(sc, txq, bf); 3523227364Sadrian 3524227364Sadrian /* Track outstanding buffer count to hardware */ 3525227364Sadrian /* aggregates are "one" buffer */ 3526227364Sadrian tid->hwq_depth++; 3527227364Sadrian 3528227364Sadrian /* 3529227364Sadrian * Break out if ath_tx_form_aggr() indicated 3530227364Sadrian * there can't be any further progress (eg BAW is full.) 3531227364Sadrian * Checking for an empty txq is done above. 3532227364Sadrian * 3533227364Sadrian * XXX locking on txq here? 3534227364Sadrian */ 3535227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 3536227364Sadrian status == ATH_AGGR_BAW_CLOSED) 3537227364Sadrian break; 3538227364Sadrian } 3539227364Sadrian} 3540227364Sadrian 3541227364Sadrian/* 3542227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3543227364Sadrian */ 3544227364Sadrianvoid 3545227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 3546227364Sadrian struct ath_tid *tid) 3547227364Sadrian{ 3548227364Sadrian struct ath_buf *bf; 3549227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3550227364Sadrian struct ieee80211_node *ni = &an->an_node; 3551227364Sadrian 3552227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 3553227364Sadrian __func__, an, tid->tid); 3554227364Sadrian 3555227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3556227364Sadrian 3557227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 3558227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 3559227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 3560227364Sadrian __func__, tid->tid); 3561227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 3562227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 3563227364Sadrian __func__, tid->tid); 3564227364Sadrian 3565227364Sadrian for (;;) { 3566227364Sadrian 3567227364Sadrian /* 3568227364Sadrian * If the upper layers have paused the TID, don't 3569227364Sadrian * queue any further packets. 3570227364Sadrian */ 3571227364Sadrian if (tid->paused) 3572227364Sadrian break; 3573227364Sadrian 3574227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3575227364Sadrian if (bf == NULL) { 3576227364Sadrian break; 3577227364Sadrian } 3578227364Sadrian 3579227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3580227364Sadrian 3581227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 3582227364Sadrian 3583227364Sadrian /* Sanity check! */ 3584227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 3585227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 3586227364Sadrian " tid %d\n", 3587227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 3588227364Sadrian } 3589227364Sadrian /* Normal completion handler */ 3590227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3591227364Sadrian 3592227364Sadrian /* Program descriptors + rate control */ 3593227364Sadrian ath_tx_do_ratelookup(sc, bf); 3594227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3595227364Sadrian ath_tx_set_rtscts(sc, bf); 3596227364Sadrian ath_tx_setds(sc, bf); 3597227364Sadrian ath_tx_chaindesclist(sc, bf); 3598227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3599227364Sadrian 3600227364Sadrian /* Track outstanding buffer count to hardware */ 3601227364Sadrian /* aggregates are "one" buffer */ 3602227364Sadrian tid->hwq_depth++; 3603227364Sadrian 3604227364Sadrian /* Punt to hardware or software txq */ 3605227364Sadrian ath_tx_handoff(sc, txq, bf); 3606227364Sadrian } 3607227364Sadrian} 3608227364Sadrian 3609227364Sadrian/* 3610227364Sadrian * Schedule some packets to the given hardware queue. 3611227364Sadrian * 3612227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 3613227364Sadrian * with queued traffic) and attempts to schedule traffic 3614227364Sadrian * from them. 3615227364Sadrian * 3616227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 3617227364Sadrian * added to the end of the queue after some frames have been 3618227364Sadrian * scheduled. 3619227364Sadrian */ 3620227364Sadrianvoid 3621227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 3622227364Sadrian{ 3623227364Sadrian struct ath_tid *tid, *next, *last; 3624227364Sadrian 3625227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3626227364Sadrian 3627227364Sadrian /* 3628227364Sadrian * Don't schedule if the hardware queue is busy. 3629227364Sadrian * This (hopefully) gives some more time to aggregate 3630227364Sadrian * some packets in the aggregation queue. 3631227364Sadrian */ 3632227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 3633227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 3634227364Sadrian return; 3635227364Sadrian } 3636227364Sadrian 3637227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 3638227364Sadrian 3639227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 3640227364Sadrian /* 3641227364Sadrian * Suspend paused queues here; they'll be resumed 3642227364Sadrian * once the addba completes or times out. 3643227364Sadrian */ 3644227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 3645227364Sadrian __func__, tid->tid, tid->paused); 3646227364Sadrian ath_tx_tid_unsched(sc, tid); 3647227364Sadrian if (tid->paused) { 3648227364Sadrian continue; 3649227364Sadrian } 3650227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 3651227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 3652227364Sadrian else 3653227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 3654227364Sadrian 3655227364Sadrian /* Not empty? Re-schedule */ 3656227364Sadrian if (tid->axq_depth != 0) 3657227364Sadrian ath_tx_tid_sched(sc, tid); 3658227364Sadrian 3659227364Sadrian /* Give the software queue time to aggregate more packets */ 3660227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 3661227364Sadrian break; 3662227364Sadrian } 3663227364Sadrian 3664227364Sadrian /* 3665227364Sadrian * If this was the last entry on the original list, stop. 3666227364Sadrian * Otherwise nodes that have been rescheduled onto the end 3667227364Sadrian * of the TID FIFO list will just keep being rescheduled. 3668227364Sadrian */ 3669227364Sadrian if (tid == last) 3670227364Sadrian break; 3671227364Sadrian } 3672227364Sadrian} 3673227364Sadrian 3674227364Sadrian/* 3675227364Sadrian * TX addba handling 3676227364Sadrian */ 3677227364Sadrian 3678227364Sadrian/* 3679227364Sadrian * Return net80211 TID struct pointer, or NULL for none 3680227364Sadrian */ 3681227364Sadrianstruct ieee80211_tx_ampdu * 3682227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 3683227364Sadrian{ 3684227364Sadrian struct ieee80211_node *ni = &an->an_node; 3685227364Sadrian struct ieee80211_tx_ampdu *tap; 3686227364Sadrian int ac; 3687227364Sadrian 3688227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3689227364Sadrian return NULL; 3690227364Sadrian 3691227364Sadrian ac = TID_TO_WME_AC(tid); 3692227364Sadrian 3693227364Sadrian tap = &ni->ni_tx_ampdu[ac]; 3694227364Sadrian return tap; 3695227364Sadrian} 3696227364Sadrian 3697227364Sadrian/* 3698227364Sadrian * Is AMPDU-TX running? 3699227364Sadrian */ 3700227364Sadrianstatic int 3701227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 3702227364Sadrian{ 3703227364Sadrian struct ieee80211_tx_ampdu *tap; 3704227364Sadrian 3705227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3706227364Sadrian return 0; 3707227364Sadrian 3708227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3709227364Sadrian if (tap == NULL) 3710227364Sadrian return 0; /* Not valid; default to not running */ 3711227364Sadrian 3712227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 3713227364Sadrian} 3714227364Sadrian 3715227364Sadrian/* 3716227364Sadrian * Is AMPDU-TX negotiation pending? 3717227364Sadrian */ 3718227364Sadrianstatic int 3719227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 3720227364Sadrian{ 3721227364Sadrian struct ieee80211_tx_ampdu *tap; 3722227364Sadrian 3723227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3724227364Sadrian return 0; 3725227364Sadrian 3726227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3727227364Sadrian if (tap == NULL) 3728227364Sadrian return 0; /* Not valid; default to not pending */ 3729227364Sadrian 3730227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 3731227364Sadrian} 3732227364Sadrian 3733227364Sadrian/* 3734227364Sadrian * Is AMPDU-TX pending for the given TID? 3735227364Sadrian */ 3736227364Sadrian 3737227364Sadrian 3738227364Sadrian/* 3739227364Sadrian * Method to handle sending an ADDBA request. 3740227364Sadrian * 3741227364Sadrian * We tap this so the relevant flags can be set to pause the TID 3742227364Sadrian * whilst waiting for the response. 3743227364Sadrian * 3744227364Sadrian * XXX there's no timeout handler we can override? 3745227364Sadrian */ 3746227364Sadrianint 3747227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 3748227364Sadrian int dialogtoken, int baparamset, int batimeout) 3749227364Sadrian{ 3750227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3751227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3752227364Sadrian struct ath_node *an = ATH_NODE(ni); 3753227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3754227364Sadrian 3755227364Sadrian /* 3756227364Sadrian * XXX danger Will Robinson! 3757227364Sadrian * 3758227364Sadrian * Although the taskqueue may be running and scheduling some more 3759227364Sadrian * packets, these should all be _before_ the addba sequence number. 3760227364Sadrian * However, net80211 will keep self-assigning sequence numbers 3761227364Sadrian * until addba has been negotiated. 3762227364Sadrian * 3763227364Sadrian * In the past, these packets would be "paused" (which still works 3764227364Sadrian * fine, as they're being scheduled to the driver in the same 3765227364Sadrian * serialised method which is calling the addba request routine) 3766227364Sadrian * and when the aggregation session begins, they'll be dequeued 3767227364Sadrian * as aggregate packets and added to the BAW. However, now there's 3768227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 3769227364Sadrian * packets. Thus they never get included in the BAW tracking and 3770227364Sadrian * this can cause the initial burst of packets after the addba 3771227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 3772227364Sadrian * 3773227364Sadrian * The "eventual" solution should be to tag these packets with 3774227364Sadrian * dobaw. Although net80211 has given us a sequence number, 3775227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 3776227364Sadrian * fall within it. 3777227364Sadrian */ 3778227364Sadrian ath_tx_tid_pause(sc, atid); 3779227364Sadrian 3780227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3781227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 3782227364Sadrian __func__, dialogtoken, baparamset, batimeout); 3783227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3784227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 3785227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 3786227364Sadrian 3787227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 3788227364Sadrian batimeout); 3789227364Sadrian} 3790227364Sadrian 3791227364Sadrian/* 3792227364Sadrian * Handle an ADDBA response. 3793227364Sadrian * 3794227364Sadrian * We unpause the queue so TX'ing can resume. 3795227364Sadrian * 3796227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 3797227364Sadrian * aggregate or not) so the BAW is updated. 3798227364Sadrian * 3799227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 3800227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 3801227364Sadrian * edge won't match the ni->ni_txseq. 3802227364Sadrian * 3803227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 3804227364Sadrian * ni->ni_txseq. 3805227364Sadrian * 3806227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 3807227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 3808227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 3809227364Sadrian * window. 3810227364Sadrian */ 3811227364Sadrianint 3812227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 3813227364Sadrian int status, int code, int batimeout) 3814227364Sadrian{ 3815227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3816227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3817227364Sadrian struct ath_node *an = ATH_NODE(ni); 3818227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3819227364Sadrian int r; 3820227364Sadrian 3821227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3822227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 3823227364Sadrian status, code, batimeout); 3824227364Sadrian 3825227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3826227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 3827227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 3828227364Sadrian 3829227364Sadrian /* 3830227364Sadrian * Call this first, so the interface flags get updated 3831227364Sadrian * before the TID is unpaused. Otherwise a race condition 3832227364Sadrian * exists where the unpaused TID still doesn't yet have 3833227364Sadrian * IEEE80211_AGGR_RUNNING set. 3834227364Sadrian */ 3835227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 3836227364Sadrian 3837227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3838227364Sadrian /* 3839227364Sadrian * XXX dirty! 3840227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 3841227364Sadrian * Read above for more information. 3842227364Sadrian */ 3843227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 3844227364Sadrian ath_tx_tid_resume(sc, atid); 3845227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3846227364Sadrian return r; 3847227364Sadrian} 3848227364Sadrian 3849227364Sadrian 3850227364Sadrian/* 3851227364Sadrian * Stop ADDBA on a queue. 3852227364Sadrian */ 3853227364Sadrianvoid 3854227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 3855227364Sadrian{ 3856227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3857227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3858227364Sadrian struct ath_node *an = ATH_NODE(ni); 3859227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3860227364Sadrian 3861227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 3862227364Sadrian 3863227364Sadrian /* Pause TID traffic early, so there aren't any races */ 3864227364Sadrian ath_tx_tid_pause(sc, atid); 3865227364Sadrian 3866227364Sadrian /* There's no need to hold the TXQ lock here */ 3867227364Sadrian sc->sc_addba_stop(ni, tap); 3868227364Sadrian 3869227364Sadrian /* 3870227364Sadrian * ath_tx_cleanup will resume the TID if possible, otherwise 3871227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 3872227364Sadrian * things have been cleaned up. 3873227364Sadrian */ 3874227364Sadrian ath_tx_cleanup(sc, an, tid); 3875227364Sadrian} 3876227364Sadrian 3877227364Sadrian/* 3878227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 3879227364Sadrian * it simply tears down the aggregation session. Ew. 3880227364Sadrian * 3881227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 3882227364Sadrian * ic->ic_addba_stop(). 3883227364Sadrian * 3884227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 3885227364Sadrian * XXX BAR TX success or failure should be better handled! 3886227364Sadrian */ 3887227364Sadrianvoid 3888227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 3889227364Sadrian int status) 3890227364Sadrian{ 3891227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3892227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3893227364Sadrian struct ath_node *an = ATH_NODE(ni); 3894227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3895227364Sadrian int attempts = tap->txa_attempts; 3896227364Sadrian 3897227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3898227364Sadrian "%s: called; status=%d\n", __func__, status); 3899227364Sadrian 3900227364Sadrian /* Note: This may update the BAW details */ 3901227364Sadrian sc->sc_bar_response(ni, tap, status); 3902227364Sadrian 3903227364Sadrian /* Unpause the TID */ 3904227364Sadrian /* 3905227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 3906227364Sadrian * XXX to a non-aggregate session. So we must unpause the 3907227364Sadrian * XXX TID here or it'll never be done. 3908227364Sadrian */ 3909227364Sadrian if (status == 0 || attempts == 50) { 3910227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3911227364Sadrian ath_tx_tid_resume(sc, atid); 3912227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3913227364Sadrian } 3914227364Sadrian} 3915227364Sadrian 3916227364Sadrian/* 3917227364Sadrian * This is called whenever the pending ADDBA request times out. 3918227364Sadrian * Unpause and reschedule the TID. 3919227364Sadrian */ 3920227364Sadrianvoid 3921227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 3922227364Sadrian struct ieee80211_tx_ampdu *tap) 3923227364Sadrian{ 3924227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3925227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3926227364Sadrian struct ath_node *an = ATH_NODE(ni); 3927227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3928227364Sadrian 3929227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3930227364Sadrian "%s: called; resuming\n", __func__); 3931227364Sadrian 3932227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 3933227364Sadrian sc->sc_addba_response_timeout(ni, tap); 3934227364Sadrian 3935227364Sadrian /* Unpause the TID; which reschedules it */ 3936227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3937227364Sadrian ath_tx_tid_resume(sc, atid); 3938227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3939227364Sadrian} 3940