if_ath_tx.c revision 236873
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 236873 2012-06-11 07:06:49Z adrian $"); 32218065Sadrian 33218065Sadrian/* 34218065Sadrian * Driver for the Atheros Wireless LAN controller. 35218065Sadrian * 36218065Sadrian * This software is derived from work of Atsushi Onoe; his contribution 37218065Sadrian * is greatly appreciated. 38218065Sadrian */ 39218065Sadrian 40218065Sadrian#include "opt_inet.h" 41218065Sadrian#include "opt_ath.h" 42218065Sadrian#include "opt_wlan.h" 43218065Sadrian 44218065Sadrian#include <sys/param.h> 45218065Sadrian#include <sys/systm.h> 46218065Sadrian#include <sys/sysctl.h> 47218065Sadrian#include <sys/mbuf.h> 48218065Sadrian#include <sys/malloc.h> 49218065Sadrian#include <sys/lock.h> 50218065Sadrian#include <sys/mutex.h> 51218065Sadrian#include <sys/kernel.h> 52218065Sadrian#include <sys/socket.h> 53218065Sadrian#include <sys/sockio.h> 54218065Sadrian#include <sys/errno.h> 55218065Sadrian#include <sys/callout.h> 56218065Sadrian#include <sys/bus.h> 57218065Sadrian#include <sys/endian.h> 58218065Sadrian#include <sys/kthread.h> 59218065Sadrian#include <sys/taskqueue.h> 60218065Sadrian#include <sys/priv.h> 61218065Sadrian 62218065Sadrian#include <machine/bus.h> 63218065Sadrian 64218065Sadrian#include <net/if.h> 65218065Sadrian#include <net/if_dl.h> 66218065Sadrian#include <net/if_media.h> 67218065Sadrian#include <net/if_types.h> 68218065Sadrian#include <net/if_arp.h> 69218065Sadrian#include <net/ethernet.h> 70218065Sadrian#include <net/if_llc.h> 71218065Sadrian 72218065Sadrian#include <net80211/ieee80211_var.h> 73218065Sadrian#include <net80211/ieee80211_regdomain.h> 74218065Sadrian#ifdef IEEE80211_SUPPORT_SUPERG 75218065Sadrian#include <net80211/ieee80211_superg.h> 76218065Sadrian#endif 77218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 78218065Sadrian#include <net80211/ieee80211_tdma.h> 79218065Sadrian#endif 80227364Sadrian#include <net80211/ieee80211_ht.h> 81218065Sadrian 82218065Sadrian#include <net/bpf.h> 83218065Sadrian 84218065Sadrian#ifdef INET 85218065Sadrian#include <netinet/in.h> 86218065Sadrian#include <netinet/if_ether.h> 87218065Sadrian#endif 88218065Sadrian 89218065Sadrian#include <dev/ath/if_athvar.h> 90218065Sadrian#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */ 91218065Sadrian#include <dev/ath/ath_hal/ah_diagcodes.h> 92218065Sadrian 93218065Sadrian#include <dev/ath/if_ath_debug.h> 94218065Sadrian 95218065Sadrian#ifdef ATH_TX99_DIAG 96218065Sadrian#include <dev/ath/ath_tx99/ath_tx99.h> 97218065Sadrian#endif 98218065Sadrian 99218065Sadrian#include <dev/ath/if_ath_misc.h> 100218065Sadrian#include <dev/ath/if_ath_tx.h> 101218240Sadrian#include <dev/ath/if_ath_tx_ht.h> 102218065Sadrian 103218154Sadrian/* 104227364Sadrian * How many retries to perform in software 105227364Sadrian */ 106227364Sadrian#define SWMAX_RETRIES 10 107227364Sadrian 108227364Sadrianstatic int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, 109227364Sadrian int tid); 110227364Sadrianstatic int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, 111227364Sadrian int tid); 112236872Sadrianstatic ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc, 113236872Sadrian struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0); 114227364Sadrianstatic int ath_tx_action_frame_override_queue(struct ath_softc *sc, 115227364Sadrian struct ieee80211_node *ni, struct mbuf *m0, int *tid); 116227364Sadrian 117227364Sadrian/* 118218154Sadrian * Whether to use the 11n rate scenario functions or not 119218154Sadrian */ 120218154Sadrianstatic inline int 121218154Sadrianath_tx_is_11n(struct ath_softc *sc) 122218154Sadrian{ 123218154Sadrian return (sc->sc_ah->ah_magic == 0x20065416); 124218154Sadrian} 125218154Sadrian 126227364Sadrian/* 127227364Sadrian * Obtain the current TID from the given frame. 128227364Sadrian * 129227364Sadrian * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.) 130227364Sadrian * This has implications for which AC/priority the packet is placed 131227364Sadrian * in. 132227364Sadrian */ 133227364Sadrianstatic int 134227364Sadrianath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0) 135227364Sadrian{ 136227364Sadrian const struct ieee80211_frame *wh; 137227364Sadrian int pri = M_WME_GETAC(m0); 138227364Sadrian 139227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 140227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 141227364Sadrian return IEEE80211_NONQOS_TID; 142227364Sadrian else 143227364Sadrian return WME_AC_TO_TID(pri); 144227364Sadrian} 145227364Sadrian 146227364Sadrian/* 147227364Sadrian * Determine what the correct AC queue for the given frame 148227364Sadrian * should be. 149227364Sadrian * 150227364Sadrian * This code assumes that the TIDs map consistently to 151227364Sadrian * the underlying hardware (or software) ath_txq. 152227364Sadrian * Since the sender may try to set an AC which is 153227364Sadrian * arbitrary, non-QoS TIDs may end up being put on 154227364Sadrian * completely different ACs. There's no way to put a 155227364Sadrian * TID into multiple ath_txq's for scheduling, so 156227364Sadrian * for now we override the AC/TXQ selection and set 157227364Sadrian * non-QOS TID frames into the BE queue. 158227364Sadrian * 159227364Sadrian * This may be completely incorrect - specifically, 160227364Sadrian * some management frames may end up out of order 161227364Sadrian * compared to the QoS traffic they're controlling. 162227364Sadrian * I'll look into this later. 163227364Sadrian */ 164227364Sadrianstatic int 165227364Sadrianath_tx_getac(struct ath_softc *sc, const struct mbuf *m0) 166227364Sadrian{ 167227364Sadrian const struct ieee80211_frame *wh; 168227364Sadrian int pri = M_WME_GETAC(m0); 169227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 170227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh)) 171227364Sadrian return pri; 172227364Sadrian 173227364Sadrian return WME_AC_BE; 174227364Sadrian} 175227364Sadrian 176218065Sadrianvoid 177218065Sadrianath_txfrag_cleanup(struct ath_softc *sc, 178218065Sadrian ath_bufhead *frags, struct ieee80211_node *ni) 179218065Sadrian{ 180218065Sadrian struct ath_buf *bf, *next; 181218065Sadrian 182218065Sadrian ATH_TXBUF_LOCK_ASSERT(sc); 183218065Sadrian 184227344Sadrian TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) { 185218065Sadrian /* NB: bf assumed clean */ 186227344Sadrian TAILQ_REMOVE(frags, bf, bf_list); 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 */ 208234009Sadrian device_printf(sc->sc_dev, "%s: no buffer?\n", 209234009Sadrian __func__); 210218065Sadrian ath_txfrag_cleanup(sc, frags, ni); 211218065Sadrian break; 212218065Sadrian } 213218065Sadrian ieee80211_node_incref(ni); 214227344Sadrian TAILQ_INSERT_TAIL(frags, bf, bf_list); 215218065Sadrian } 216218065Sadrian ATH_TXBUF_UNLOCK(sc); 217218065Sadrian 218227344Sadrian return !TAILQ_EMPTY(frags); 219218065Sadrian} 220218065Sadrian 221218065Sadrian/* 222218065Sadrian * Reclaim mbuf resources. For fragmented frames we 223218065Sadrian * need to claim each frag chained with m_nextpkt. 224218065Sadrian */ 225218065Sadrianvoid 226218065Sadrianath_freetx(struct mbuf *m) 227218065Sadrian{ 228218065Sadrian struct mbuf *next; 229218065Sadrian 230218065Sadrian do { 231218065Sadrian next = m->m_nextpkt; 232218065Sadrian m->m_nextpkt = NULL; 233218065Sadrian m_freem(m); 234218065Sadrian } while ((m = next) != NULL); 235218065Sadrian} 236218065Sadrian 237218065Sadrianstatic int 238218065Sadrianath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0) 239218065Sadrian{ 240218065Sadrian struct mbuf *m; 241218065Sadrian int error; 242218065Sadrian 243218065Sadrian /* 244218065Sadrian * Load the DMA map so any coalescing is done. This 245218065Sadrian * also calculates the number of descriptors we need. 246218065Sadrian */ 247218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 248218065Sadrian bf->bf_segs, &bf->bf_nseg, 249218065Sadrian BUS_DMA_NOWAIT); 250218065Sadrian if (error == EFBIG) { 251218065Sadrian /* XXX packet requires too many descriptors */ 252218065Sadrian bf->bf_nseg = ATH_TXDESC+1; 253218065Sadrian } else if (error != 0) { 254218065Sadrian sc->sc_stats.ast_tx_busdma++; 255218065Sadrian ath_freetx(m0); 256218065Sadrian return error; 257218065Sadrian } 258218065Sadrian /* 259218065Sadrian * Discard null packets and check for packets that 260218065Sadrian * require too many TX descriptors. We try to convert 261218065Sadrian * the latter to a cluster. 262218065Sadrian */ 263218065Sadrian if (bf->bf_nseg > ATH_TXDESC) { /* too many desc's, linearize */ 264218065Sadrian sc->sc_stats.ast_tx_linear++; 265218065Sadrian m = m_collapse(m0, M_DONTWAIT, ATH_TXDESC); 266218065Sadrian if (m == NULL) { 267218065Sadrian ath_freetx(m0); 268218065Sadrian sc->sc_stats.ast_tx_nombuf++; 269218065Sadrian return ENOMEM; 270218065Sadrian } 271218065Sadrian m0 = m; 272218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 273218065Sadrian bf->bf_segs, &bf->bf_nseg, 274218065Sadrian BUS_DMA_NOWAIT); 275218065Sadrian if (error != 0) { 276218065Sadrian sc->sc_stats.ast_tx_busdma++; 277218065Sadrian ath_freetx(m0); 278218065Sadrian return error; 279218065Sadrian } 280218065Sadrian KASSERT(bf->bf_nseg <= ATH_TXDESC, 281218065Sadrian ("too many segments after defrag; nseg %u", bf->bf_nseg)); 282218065Sadrian } else if (bf->bf_nseg == 0) { /* null packet, discard */ 283218065Sadrian sc->sc_stats.ast_tx_nodata++; 284218065Sadrian ath_freetx(m0); 285218065Sadrian return EIO; 286218065Sadrian } 287218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", 288218065Sadrian __func__, m0, m0->m_pkthdr.len); 289218065Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 290218065Sadrian bf->bf_m = m0; 291218065Sadrian 292218065Sadrian return 0; 293218065Sadrian} 294218065Sadrian 295227360Sadrian/* 296227360Sadrian * Chain together segments+descriptors for a non-11n frame. 297227360Sadrian */ 298218065Sadrianstatic void 299227364Sadrianath_tx_chaindesclist(struct ath_softc *sc, struct ath_buf *bf) 300218065Sadrian{ 301218065Sadrian struct ath_hal *ah = sc->sc_ah; 302218065Sadrian struct ath_desc *ds, *ds0; 303218065Sadrian int i; 304218065Sadrian 305218065Sadrian /* 306218065Sadrian * Fillin the remainder of the descriptor info. 307218065Sadrian */ 308218065Sadrian ds0 = ds = bf->bf_desc; 309218065Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 310218065Sadrian ds->ds_data = bf->bf_segs[i].ds_addr; 311218065Sadrian if (i == bf->bf_nseg - 1) 312218065Sadrian ds->ds_link = 0; 313218065Sadrian else 314218065Sadrian ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 315218065Sadrian ath_hal_filltxdesc(ah, ds 316218065Sadrian , bf->bf_segs[i].ds_len /* segment length */ 317218065Sadrian , i == 0 /* first segment */ 318218065Sadrian , i == bf->bf_nseg - 1 /* last segment */ 319218065Sadrian , ds0 /* first descriptor */ 320218065Sadrian ); 321218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 322218065Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 323218065Sadrian __func__, i, ds->ds_link, ds->ds_data, 324218065Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 325227360Sadrian bf->bf_lastds = ds; 326218065Sadrian } 327233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 328218154Sadrian} 329218154Sadrian 330227364Sadrian/* 331227364Sadrian * Fill in the descriptor list for a aggregate subframe. 332227364Sadrian * 333227364Sadrian * The subframe is returned with the ds_link field in the last subframe 334227364Sadrian * pointing to 0. 335227364Sadrian */ 336218154Sadrianstatic void 337227364Sadrianath_tx_chaindesclist_subframe(struct ath_softc *sc, struct ath_buf *bf) 338218154Sadrian{ 339218154Sadrian struct ath_hal *ah = sc->sc_ah; 340227364Sadrian struct ath_desc *ds, *ds0; 341227364Sadrian int i; 342218154Sadrian 343227364Sadrian ds0 = ds = bf->bf_desc; 344218154Sadrian 345218065Sadrian /* 346227364Sadrian * There's no need to call ath_hal_setupfirsttxdesc here; 347227364Sadrian * That's only going to occur for the first frame in an aggregate. 348227364Sadrian */ 349227364Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 350227364Sadrian ds->ds_data = bf->bf_segs[i].ds_addr; 351227364Sadrian if (i == bf->bf_nseg - 1) 352227364Sadrian ds->ds_link = 0; 353227364Sadrian else 354227364Sadrian ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 355227364Sadrian 356227364Sadrian /* 357227364Sadrian * This performs the setup for an aggregate frame. 358227364Sadrian * This includes enabling the aggregate flags if needed. 359227364Sadrian */ 360227364Sadrian ath_hal_chaintxdesc(ah, ds, 361227364Sadrian bf->bf_state.bfs_pktlen, 362227364Sadrian bf->bf_state.bfs_hdrlen, 363227364Sadrian HAL_PKT_TYPE_AMPDU, /* forces aggregate bits to be set */ 364227364Sadrian bf->bf_state.bfs_keyix, 365227364Sadrian 0, /* cipher, calculated from keyix */ 366227364Sadrian bf->bf_state.bfs_ndelim, 367227364Sadrian bf->bf_segs[i].ds_len, /* segment length */ 368227364Sadrian i == 0, /* first segment */ 369233895Sadrian i == bf->bf_nseg - 1, /* last segment */ 370233895Sadrian bf->bf_next == NULL /* last sub-frame in aggr */ 371227364Sadrian ); 372227364Sadrian 373227364Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 374227364Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 375227364Sadrian __func__, i, ds->ds_link, ds->ds_data, 376227364Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 377227364Sadrian bf->bf_lastds = ds; 378233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 379233990Sadrian BUS_DMASYNC_PREWRITE); 380227364Sadrian } 381227364Sadrian} 382227364Sadrian 383227364Sadrian/* 384227364Sadrian * Setup segments+descriptors for an 11n aggregate. 385227364Sadrian * bf_first is the first buffer in the aggregate. 386227364Sadrian * The descriptor list must already been linked together using 387227364Sadrian * bf->bf_next. 388227364Sadrian */ 389227364Sadrianstatic void 390227364Sadrianath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first) 391227364Sadrian{ 392227364Sadrian struct ath_buf *bf, *bf_prev = NULL; 393227364Sadrian 394227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n", 395227364Sadrian __func__, bf_first->bf_state.bfs_nframes, 396227364Sadrian bf_first->bf_state.bfs_al); 397227364Sadrian 398227364Sadrian /* 399227364Sadrian * Setup all descriptors of all subframes. 400227364Sadrian */ 401227364Sadrian bf = bf_first; 402227364Sadrian while (bf != NULL) { 403227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 404227364Sadrian "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n", 405227364Sadrian __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen, 406227364Sadrian SEQNO(bf->bf_state.bfs_seqno)); 407227364Sadrian 408227364Sadrian /* Sub-frame setup */ 409227364Sadrian ath_tx_chaindesclist_subframe(sc, bf); 410227364Sadrian 411227364Sadrian /* 412227364Sadrian * Link the last descriptor of the previous frame 413227364Sadrian * to the beginning descriptor of this frame. 414227364Sadrian */ 415227364Sadrian if (bf_prev != NULL) 416227364Sadrian bf_prev->bf_lastds->ds_link = bf->bf_daddr; 417227364Sadrian 418227364Sadrian /* Save a copy so we can link the next descriptor in */ 419227364Sadrian bf_prev = bf; 420227364Sadrian bf = bf->bf_next; 421227364Sadrian } 422227364Sadrian 423227364Sadrian /* 424227364Sadrian * Setup first descriptor of first frame. 425227364Sadrian * chaintxdesc() overwrites the descriptor entries; 426227364Sadrian * setupfirsttxdesc() merges in things. 427227364Sadrian * Otherwise various fields aren't set correctly (eg flags). 428227364Sadrian */ 429227364Sadrian ath_hal_setupfirsttxdesc(sc->sc_ah, 430227364Sadrian bf_first->bf_desc, 431227364Sadrian bf_first->bf_state.bfs_al, 432233966Sadrian bf_first->bf_state.bfs_txflags | HAL_TXDESC_INTREQ, 433227364Sadrian bf_first->bf_state.bfs_txpower, 434227364Sadrian bf_first->bf_state.bfs_txrate0, 435227364Sadrian bf_first->bf_state.bfs_try0, 436227364Sadrian bf_first->bf_state.bfs_txantenna, 437227364Sadrian bf_first->bf_state.bfs_ctsrate, 438227364Sadrian bf_first->bf_state.bfs_ctsduration); 439227364Sadrian 440227364Sadrian /* 441227364Sadrian * Setup the last descriptor in the list. 442227364Sadrian * bf_prev points to the last; bf is NULL here. 443227364Sadrian */ 444229949Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_desc, 445229949Sadrian bf_first->bf_desc); 446227364Sadrian 447227364Sadrian /* 448227364Sadrian * Set the first descriptor bf_lastds field to point to 449227364Sadrian * the last descriptor in the last subframe, that's where 450227364Sadrian * the status update will occur. 451227364Sadrian */ 452227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 453227364Sadrian 454227364Sadrian /* 455227364Sadrian * And bf_last in the first descriptor points to the end of 456227364Sadrian * the aggregate list. 457227364Sadrian */ 458227364Sadrian bf_first->bf_last = bf_prev; 459227364Sadrian 460227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 461227364Sadrian} 462227364Sadrian 463227364Sadrianstatic void 464227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 465227364Sadrian struct ath_buf *bf) 466227364Sadrian{ 467227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 468227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 469227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 470227364Sadrian if (txq->axq_link != NULL) { 471227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 472227364Sadrian struct ieee80211_frame *wh; 473227364Sadrian 474227364Sadrian /* mark previous frame */ 475227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 476227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 477227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 478227364Sadrian BUS_DMASYNC_PREWRITE); 479227364Sadrian 480227364Sadrian /* link descriptor */ 481227364Sadrian *txq->axq_link = bf->bf_daddr; 482227364Sadrian } 483227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 484227364Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 485227364Sadrian} 486227364Sadrian 487227364Sadrian/* 488227364Sadrian * Hand-off packet to a hardware queue. 489227364Sadrian */ 490227364Sadrianstatic void 491229949Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, 492229949Sadrian struct ath_buf *bf) 493227364Sadrian{ 494227364Sadrian struct ath_hal *ah = sc->sc_ah; 495227364Sadrian 496227364Sadrian /* 497218065Sadrian * Insert the frame on the outbound list and pass it on 498218065Sadrian * to the hardware. Multicast frames buffered for power 499218065Sadrian * save stations and transmit from the CAB queue are stored 500218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 501218065Sadrian * the SWBA handler since frames only go out on DTIM and 502218065Sadrian * to avoid possible races. 503218065Sadrian */ 504227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 505218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 506227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 507227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 508227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 509227364Sadrian 510227651Sadrian#if 0 511227651Sadrian /* 512227651Sadrian * This causes a LOR. Find out where the PCU lock is being 513227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 514227651Sadrian * be occuring. 515227651Sadrian */ 516227651Sadrian ATH_PCU_LOCK(sc); 517227651Sadrian if (sc->sc_inreset_cnt) { 518227651Sadrian ATH_PCU_UNLOCK(sc); 519227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 520227651Sadrian "%s: called with sc_in_reset != 0\n", 521227651Sadrian __func__); 522227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 523227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 524227651Sadrian __func__, txq->axq_qnum, 525227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 526227651Sadrian txq->axq_depth); 527227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 528227651Sadrian if (bf->bf_state.bfs_aggr) 529227651Sadrian txq->axq_aggr_depth++; 530227651Sadrian /* 531227651Sadrian * There's no need to update axq_link; the hardware 532227651Sadrian * is in reset and once the reset is complete, any 533227651Sadrian * non-empty queues will simply have DMA restarted. 534227651Sadrian */ 535227651Sadrian return; 536227651Sadrian } 537227651Sadrian ATH_PCU_UNLOCK(sc); 538227651Sadrian#endif 539227651Sadrian 540227364Sadrian /* For now, so not to generate whitespace diffs */ 541227364Sadrian if (1) { 542218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 543218065Sadrian int qbusy; 544218065Sadrian 545218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 546218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 547218065Sadrian if (txq->axq_link == NULL) { 548218065Sadrian /* 549218065Sadrian * Be careful writing the address to TXDP. If 550218065Sadrian * the tx q is enabled then this write will be 551218065Sadrian * ignored. Normally this is not an issue but 552218065Sadrian * when tdma is in use and the q is beacon gated 553218065Sadrian * this race can occur. If the q is busy then 554218065Sadrian * defer the work to later--either when another 555218065Sadrian * packet comes along or when we prepare a beacon 556218065Sadrian * frame at SWBA. 557218065Sadrian */ 558218065Sadrian if (!qbusy) { 559229949Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 560229949Sadrian bf->bf_daddr); 561218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 562218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 563218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 564218065Sadrian __func__, txq->axq_qnum, 565218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 566218065Sadrian txq->axq_depth); 567218065Sadrian } else { 568218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 569218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 570218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 571218065Sadrian txq->axq_qnum); 572218065Sadrian } 573218065Sadrian } else { 574218065Sadrian *txq->axq_link = bf->bf_daddr; 575218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 576218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 577218065Sadrian txq->axq_qnum, txq->axq_link, 578229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 579229949Sadrian txq->axq_depth); 580218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 581218065Sadrian /* 582218065Sadrian * The q was busy when we previously tried 583218065Sadrian * to write the address of the first buffer 584218065Sadrian * in the chain. Since it's not busy now 585218065Sadrian * handle this chore. We are certain the 586218065Sadrian * buffer at the front is the right one since 587218065Sadrian * axq_link is NULL only when the buffer list 588218065Sadrian * is/was empty. 589218065Sadrian */ 590218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 591227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 592218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 593218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 594218065Sadrian "%s: Q%u restarted\n", __func__, 595218065Sadrian txq->axq_qnum); 596218065Sadrian } 597218065Sadrian } 598218065Sadrian#else 599218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 600218065Sadrian if (txq->axq_link == NULL) { 601218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 602218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 603218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 604218065Sadrian __func__, txq->axq_qnum, 605218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 606218065Sadrian txq->axq_depth); 607218065Sadrian } else { 608218065Sadrian *txq->axq_link = bf->bf_daddr; 609218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 610218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 611218065Sadrian txq->axq_qnum, txq->axq_link, 612229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 613229949Sadrian txq->axq_depth); 614218065Sadrian } 615218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 616227360Sadrian if (bf->bf_state.bfs_aggr) 617227360Sadrian txq->axq_aggr_depth++; 618227360Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 619218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 620227364Sadrian } 621227364Sadrian} 622218065Sadrian 623227364Sadrian/* 624227364Sadrian * Restart TX DMA for the given TXQ. 625227364Sadrian * 626227364Sadrian * This must be called whether the queue is empty or not. 627227364Sadrian */ 628227364Sadrianvoid 629227364Sadrianath_txq_restart_dma(struct ath_softc *sc, struct ath_txq *txq) 630227364Sadrian{ 631227364Sadrian struct ath_hal *ah = sc->sc_ah; 632232707Sadrian struct ath_buf *bf, *bf_last; 633218065Sadrian 634227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 635227364Sadrian 636227364Sadrian /* This is always going to be cleared, empty or not */ 637227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 638227364Sadrian 639232707Sadrian /* XXX make this ATH_TXQ_FIRST */ 640227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 641232707Sadrian bf_last = ATH_TXQ_LAST(txq, axq_q_s); 642232707Sadrian 643227364Sadrian if (bf == NULL) 644227364Sadrian return; 645227364Sadrian 646227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 647232707Sadrian txq->axq_link = &bf_last->bf_lastds->ds_link; 648227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 649218065Sadrian} 650218065Sadrian 651227364Sadrian/* 652227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 653227364Sadrian * 654227364Sadrian * The relevant hardware txq should be locked. 655227364Sadrian */ 656227364Sadrianstatic void 657227364Sadrianath_tx_handoff(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf) 658227364Sadrian{ 659227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 660227364Sadrian 661227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 662227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 663227364Sadrian else 664227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 665227364Sadrian} 666227364Sadrian 667218154Sadrianstatic int 668218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 669229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 670229949Sadrian int *keyix) 671218154Sadrian{ 672233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 673233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 674233330Sadrian __func__, 675233330Sadrian *hdrlen, 676233330Sadrian *pktlen, 677233330Sadrian isfrag, 678233330Sadrian iswep, 679233330Sadrian m0); 680233330Sadrian 681218154Sadrian if (iswep) { 682218154Sadrian const struct ieee80211_cipher *cip; 683218154Sadrian struct ieee80211_key *k; 684218154Sadrian 685218154Sadrian /* 686218154Sadrian * Construct the 802.11 header+trailer for an encrypted 687218154Sadrian * frame. The only reason this can fail is because of an 688218154Sadrian * unknown or unsupported cipher/key type. 689218154Sadrian */ 690218154Sadrian k = ieee80211_crypto_encap(ni, m0); 691218154Sadrian if (k == NULL) { 692218154Sadrian /* 693218154Sadrian * This can happen when the key is yanked after the 694218154Sadrian * frame was queued. Just discard the frame; the 695218154Sadrian * 802.11 layer counts failures and provides 696218154Sadrian * debugging/diagnostics. 697218154Sadrian */ 698229949Sadrian return (0); 699218154Sadrian } 700218154Sadrian /* 701218154Sadrian * Adjust the packet + header lengths for the crypto 702218154Sadrian * additions and calculate the h/w key index. When 703218154Sadrian * a s/w mic is done the frame will have had any mic 704218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 705218154Sadrian * account for it. Otherwise we need to add it to the 706218154Sadrian * packet length. 707218154Sadrian */ 708218154Sadrian cip = k->wk_cipher; 709218154Sadrian (*hdrlen) += cip->ic_header; 710218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 711218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 712218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 713218154Sadrian (*pktlen) += cip->ic_miclen; 714218154Sadrian (*keyix) = k->wk_keyix; 715218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 716218154Sadrian /* 717218154Sadrian * Use station key cache slot, if assigned. 718218154Sadrian */ 719218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 720218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 721218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 722218154Sadrian } else 723218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 724218154Sadrian 725229949Sadrian return (1); 726218154Sadrian} 727218154Sadrian 728233989Sadrian/* 729233989Sadrian * Calculate whether interoperability protection is required for 730233989Sadrian * this frame. 731233989Sadrian * 732233989Sadrian * This requires the rate control information be filled in, 733233989Sadrian * as the protection requirement depends upon the current 734233989Sadrian * operating mode / PHY. 735233989Sadrian */ 736233989Sadrianstatic void 737233989Sadrianath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf) 738233989Sadrian{ 739233989Sadrian struct ieee80211_frame *wh; 740233989Sadrian uint8_t rix; 741233989Sadrian uint16_t flags; 742233989Sadrian int shortPreamble; 743233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 744233989Sadrian struct ifnet *ifp = sc->sc_ifp; 745233989Sadrian struct ieee80211com *ic = ifp->if_l2com; 746233989Sadrian 747233989Sadrian flags = bf->bf_state.bfs_txflags; 748233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 749233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 750233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 751233989Sadrian 752233989Sadrian /* 753233989Sadrian * If 802.11g protection is enabled, determine whether 754233989Sadrian * to use RTS/CTS or just CTS. Note that this is only 755233989Sadrian * done for OFDM unicast frames. 756233989Sadrian */ 757233989Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 758233989Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 759233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 760233989Sadrian bf->bf_state.bfs_doprot = 1; 761233989Sadrian /* XXX fragments must use CCK rates w/ protection */ 762233989Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 763233989Sadrian flags |= HAL_TXDESC_RTSENA; 764233989Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 765233989Sadrian flags |= HAL_TXDESC_CTSENA; 766233989Sadrian } 767233989Sadrian /* 768233989Sadrian * For frags it would be desirable to use the 769233989Sadrian * highest CCK rate for RTS/CTS. But stations 770233989Sadrian * farther away may detect it at a lower CCK rate 771233989Sadrian * so use the configured protection rate instead 772233989Sadrian * (for now). 773233989Sadrian */ 774233989Sadrian sc->sc_stats.ast_tx_protect++; 775233989Sadrian } 776233989Sadrian 777233989Sadrian /* 778233989Sadrian * If 11n protection is enabled and it's a HT frame, 779233989Sadrian * enable RTS. 780233989Sadrian * 781233989Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 782233989Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 783233989Sadrian * XXX indicates it's not a HT pure environment? 784233989Sadrian */ 785233989Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 786233989Sadrian rt->info[rix].phy == IEEE80211_T_HT && 787233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 788233989Sadrian flags |= HAL_TXDESC_RTSENA; 789233989Sadrian sc->sc_stats.ast_tx_htprotect++; 790233989Sadrian } 791233989Sadrian bf->bf_state.bfs_txflags = flags; 792233989Sadrian} 793233989Sadrian 794233989Sadrian/* 795233989Sadrian * Update the frame duration given the currently selected rate. 796233989Sadrian * 797233989Sadrian * This also updates the frame duration value, so it will require 798233989Sadrian * a DMA flush. 799233989Sadrian */ 800233989Sadrianstatic void 801233989Sadrianath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf) 802233989Sadrian{ 803233989Sadrian struct ieee80211_frame *wh; 804233989Sadrian uint8_t rix; 805233989Sadrian uint16_t flags; 806233989Sadrian int shortPreamble; 807233989Sadrian struct ath_hal *ah = sc->sc_ah; 808233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 809233989Sadrian int isfrag = bf->bf_m->m_flags & M_FRAG; 810233989Sadrian 811233989Sadrian flags = bf->bf_state.bfs_txflags; 812233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 813233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 814233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 815233989Sadrian 816233989Sadrian /* 817233989Sadrian * Calculate duration. This logically belongs in the 802.11 818233989Sadrian * layer but it lacks sufficient information to calculate it. 819233989Sadrian */ 820233989Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 821233989Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 822233989Sadrian u_int16_t dur; 823233989Sadrian if (shortPreamble) 824233989Sadrian dur = rt->info[rix].spAckDuration; 825233989Sadrian else 826233989Sadrian dur = rt->info[rix].lpAckDuration; 827233989Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 828233989Sadrian dur += dur; /* additional SIFS+ACK */ 829233989Sadrian KASSERT(bf->bf_m->m_nextpkt != NULL, ("no fragment")); 830233989Sadrian /* 831233989Sadrian * Include the size of next fragment so NAV is 832233989Sadrian * updated properly. The last fragment uses only 833233989Sadrian * the ACK duration 834233989Sadrian */ 835233989Sadrian dur += ath_hal_computetxtime(ah, rt, 836233989Sadrian bf->bf_m->m_nextpkt->m_pkthdr.len, 837233989Sadrian rix, shortPreamble); 838233989Sadrian } 839233989Sadrian if (isfrag) { 840233989Sadrian /* 841233989Sadrian * Force hardware to use computed duration for next 842233989Sadrian * fragment by disabling multi-rate retry which updates 843233989Sadrian * duration based on the multi-rate duration table. 844233989Sadrian */ 845233989Sadrian bf->bf_state.bfs_ismrr = 0; 846233989Sadrian bf->bf_state.bfs_try0 = ATH_TXMGTTRY; 847233989Sadrian /* XXX update bfs_rc[0].try? */ 848233989Sadrian } 849233989Sadrian 850233989Sadrian /* Update the duration field itself */ 851233989Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 852233989Sadrian } 853233989Sadrian} 854233989Sadrian 855218932Sadrianstatic uint8_t 856218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 857227364Sadrian int cix, int shortPreamble) 858218157Sadrian{ 859218932Sadrian uint8_t ctsrate; 860218932Sadrian 861218157Sadrian /* 862218157Sadrian * CTS transmit rate is derived from the transmit rate 863218157Sadrian * by looking in the h/w rate table. We must also factor 864218157Sadrian * in whether or not a short preamble is to be used. 865218157Sadrian */ 866218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 867218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 868218932Sadrian ctsrate = rt->info[cix].rateCode; 869218932Sadrian 870218932Sadrian /* XXX this should only matter for legacy rates */ 871218932Sadrian if (shortPreamble) 872218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 873218932Sadrian 874229949Sadrian return (ctsrate); 875218932Sadrian} 876218932Sadrian 877218932Sadrian/* 878218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 879218932Sadrian */ 880218932Sadrianstatic int 881218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 882218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 883218932Sadrian int flags) 884218932Sadrian{ 885218932Sadrian int ctsduration = 0; 886218932Sadrian 887218932Sadrian /* This mustn't be called for HT modes */ 888218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 889218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 890218932Sadrian __func__, rt->info[cix].rateCode); 891229949Sadrian return (-1); 892218932Sadrian } 893218932Sadrian 894218157Sadrian /* 895218157Sadrian * Compute the transmit duration based on the frame 896218157Sadrian * size and the size of an ACK frame. We call into the 897218157Sadrian * HAL to do the computation since it depends on the 898218157Sadrian * characteristics of the actual PHY being used. 899218157Sadrian * 900218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 901218157Sadrian * use the precalculated ACK durations. 902218157Sadrian */ 903218157Sadrian if (shortPreamble) { 904218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 905218932Sadrian ctsduration += rt->info[cix].spAckDuration; 906218932Sadrian ctsduration += ath_hal_computetxtime(ah, 907218157Sadrian rt, pktlen, rix, AH_TRUE); 908218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 909218932Sadrian ctsduration += rt->info[rix].spAckDuration; 910218157Sadrian } else { 911218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 912218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 913218932Sadrian ctsduration += ath_hal_computetxtime(ah, 914218157Sadrian rt, pktlen, rix, AH_FALSE); 915218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 916218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 917218157Sadrian } 918218932Sadrian 919229949Sadrian return (ctsduration); 920218157Sadrian} 921218157Sadrian 922227364Sadrian/* 923227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 924227364Sadrian * values. 925227364Sadrian * 926227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 927227364Sadrian * and cts duration must be re-calculated. 928227364Sadrian * 929227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 930227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 931227364Sadrian * 932227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 933227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 934227364Sadrian */ 935227364Sadrianstatic void 936227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 937218065Sadrian{ 938227364Sadrian uint16_t ctsduration = 0; 939227364Sadrian uint8_t ctsrate = 0; 940227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 941227364Sadrian uint8_t cix = 0; 942227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 943227364Sadrian 944227364Sadrian /* 945227364Sadrian * No RTS/CTS enabled? Don't bother. 946227364Sadrian */ 947233966Sadrian if ((bf->bf_state.bfs_txflags & 948227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 949227364Sadrian /* XXX is this really needed? */ 950227364Sadrian bf->bf_state.bfs_ctsrate = 0; 951227364Sadrian bf->bf_state.bfs_ctsduration = 0; 952227364Sadrian return; 953227364Sadrian } 954227364Sadrian 955227364Sadrian /* 956227364Sadrian * If protection is enabled, use the protection rix control 957227364Sadrian * rate. Otherwise use the rate0 control rate. 958227364Sadrian */ 959227364Sadrian if (bf->bf_state.bfs_doprot) 960227364Sadrian rix = sc->sc_protrix; 961227364Sadrian else 962227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 963227364Sadrian 964227364Sadrian /* 965227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 966227364Sadrian * use it. 967227364Sadrian */ 968227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 969227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 970227364Sadrian else 971227364Sadrian /* Control rate from above */ 972227364Sadrian cix = rt->info[rix].controlRate; 973227364Sadrian 974227364Sadrian /* Calculate the rtscts rate for the given cix */ 975227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 976227364Sadrian bf->bf_state.bfs_shpream); 977227364Sadrian 978227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 979227364Sadrian if (! ath_tx_is_11n(sc)) 980227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 981227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 982233966Sadrian rt, bf->bf_state.bfs_txflags); 983227364Sadrian 984227364Sadrian /* Squirrel away in ath_buf */ 985227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 986227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 987227364Sadrian 988227364Sadrian /* 989227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 990227364Sadrian * XXX TODO: only for pre-11n NICs. 991227364Sadrian */ 992227364Sadrian bf->bf_state.bfs_ismrr = 0; 993227364Sadrian bf->bf_state.bfs_try0 = 994227364Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 995227364Sadrian} 996227364Sadrian 997227364Sadrian/* 998227364Sadrian * Setup the descriptor chain for a normal or fast-frame 999227364Sadrian * frame. 1000227364Sadrian */ 1001227364Sadrianstatic void 1002227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 1003227364Sadrian{ 1004227364Sadrian struct ath_desc *ds = bf->bf_desc; 1005227364Sadrian struct ath_hal *ah = sc->sc_ah; 1006227364Sadrian 1007227364Sadrian ath_hal_setuptxdesc(ah, ds 1008227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 1009227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 1010227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 1011227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 1012227364Sadrian , bf->bf_state.bfs_txrate0 1013227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 1014227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 1015227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 1016233966Sadrian , bf->bf_state.bfs_txflags /* flags */ 1017227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 1018227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 1019227364Sadrian ); 1020227364Sadrian 1021227364Sadrian /* 1022227364Sadrian * This will be overriden when the descriptor chain is written. 1023227364Sadrian */ 1024227364Sadrian bf->bf_lastds = ds; 1025227364Sadrian bf->bf_last = bf; 1026227364Sadrian 1027227364Sadrian /* XXX TODO: Setup descriptor chain */ 1028227364Sadrian} 1029227364Sadrian 1030227364Sadrian/* 1031227364Sadrian * Do a rate lookup. 1032227364Sadrian * 1033227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 1034227364Sadrian * Non-data frames and raw frames don't require it. 1035227364Sadrian * 1036227364Sadrian * This populates the primary and MRR entries; MRR values are 1037227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 1038227364Sadrian * pre-11n chipsets. 1039227364Sadrian * 1040227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 1041227364Sadrian * as they may depend upon the rate chosen. 1042227364Sadrian */ 1043227364Sadrianstatic void 1044227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 1045227364Sadrian{ 1046227364Sadrian uint8_t rate, rix; 1047227364Sadrian int try0; 1048227364Sadrian 1049227364Sadrian if (! bf->bf_state.bfs_doratelookup) 1050227364Sadrian return; 1051227364Sadrian 1052227364Sadrian /* Get rid of any previous state */ 1053227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1054227364Sadrian 1055227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 1056227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 1057227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 1058227364Sadrian 1059227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 1060227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1061227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 1062227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1063227364Sadrian 1064227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 1065227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 1066227364Sadrian bf->bf_state.bfs_rc); 1067227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 1068227364Sadrian 1069227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 1070227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 1071227364Sadrian bf->bf_state.bfs_try0 = try0; 1072227364Sadrian bf->bf_state.bfs_txrate0 = rate; 1073227364Sadrian} 1074227364Sadrian 1075227364Sadrian/* 1076227364Sadrian * Set the rate control fields in the given descriptor based on 1077227364Sadrian * the bf_state fields and node state. 1078227364Sadrian * 1079227364Sadrian * The bfs fields should already be set with the relevant rate 1080227364Sadrian * control information, including whether MRR is to be enabled. 1081227364Sadrian * 1082227364Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 1083227364Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 1084227364Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 1085227364Sadrian * unconditionally for 11n chips. These require the 11n rate 1086227364Sadrian * scenario to be set if MCS rates are enabled, so it's easier 1087227364Sadrian * to just always call it. The caller can then only set rates 2, 3 1088227364Sadrian * and 4 if multi-rate retry is needed. 1089227364Sadrian */ 1090227364Sadrianstatic void 1091227364Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 1092227364Sadrian struct ath_buf *bf) 1093227364Sadrian{ 1094227364Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 1095227364Sadrian 1096227364Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 1097227364Sadrian if (! bf->bf_state.bfs_ismrr) 1098227364Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 1099227364Sadrian 1100227364Sadrian /* 1101227364Sadrian * Always call - that way a retried descriptor will 1102227364Sadrian * have the MRR fields overwritten. 1103227364Sadrian * 1104227364Sadrian * XXX TODO: see if this is really needed - setting up 1105227364Sadrian * the first descriptor should set the MRR fields to 0 1106227364Sadrian * for us anyway. 1107227364Sadrian */ 1108227364Sadrian if (ath_tx_is_11n(sc)) { 1109227364Sadrian ath_buf_set_rate(sc, ni, bf); 1110227364Sadrian } else { 1111227364Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 1112227364Sadrian , rc[1].ratecode, rc[1].tries 1113227364Sadrian , rc[2].ratecode, rc[2].tries 1114227364Sadrian , rc[3].ratecode, rc[3].tries 1115227364Sadrian ); 1116227364Sadrian } 1117227364Sadrian} 1118227364Sadrian 1119227364Sadrian/* 1120227364Sadrian * Transmit the given frame to the hardware. 1121227364Sadrian * 1122227364Sadrian * The frame must already be setup; rate control must already have 1123227364Sadrian * been done. 1124227364Sadrian * 1125227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 1126227364Sadrian * it for this long when not doing software aggregation), later on 1127227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 1128227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 1129227364Sadrian */ 1130227364Sadrianstatic void 1131227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 1132227364Sadrian struct ath_buf *bf) 1133227364Sadrian{ 1134227364Sadrian 1135227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1136227364Sadrian 1137227364Sadrian /* Setup the descriptor before handoff */ 1138227364Sadrian ath_tx_do_ratelookup(sc, bf); 1139233989Sadrian ath_tx_calc_duration(sc, bf); 1140233989Sadrian ath_tx_calc_protection(sc, bf); 1141233989Sadrian ath_tx_set_rtscts(sc, bf); 1142227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1143227364Sadrian ath_tx_setds(sc, bf); 1144227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1145227364Sadrian ath_tx_chaindesclist(sc, bf); 1146227364Sadrian 1147227364Sadrian /* Hand off to hardware */ 1148227364Sadrian ath_tx_handoff(sc, txq, bf); 1149227364Sadrian} 1150227364Sadrian 1151227364Sadrian 1152227364Sadrian 1153227364Sadrianstatic int 1154227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1155234009Sadrian struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq) 1156227364Sadrian{ 1157218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1158218065Sadrian struct ath_hal *ah = sc->sc_ah; 1159218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1160218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1161218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1162218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1163227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1164227364Sadrian u_int8_t rix = 0, txrate = 0; 1165218065Sadrian struct ath_desc *ds; 1166218065Sadrian struct ieee80211_frame *wh; 1167227364Sadrian u_int subtype, flags; 1168218065Sadrian HAL_PKT_TYPE atype; 1169218065Sadrian const HAL_RATE_TABLE *rt; 1170218065Sadrian HAL_BOOL shortPreamble; 1171218065Sadrian struct ath_node *an; 1172218065Sadrian u_int pri; 1173218065Sadrian 1174218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1175218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1176218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1177218065Sadrian isfrag = m0->m_flags & M_FRAG; 1178218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1179218065Sadrian /* 1180218065Sadrian * Packet length must not include any 1181218065Sadrian * pad bytes; deduct them here. 1182218065Sadrian */ 1183218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1184218065Sadrian 1185218154Sadrian /* Handle encryption twiddling if needed */ 1186227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1187227364Sadrian &pktlen, &keyix)) { 1188218154Sadrian ath_freetx(m0); 1189218154Sadrian return EIO; 1190218154Sadrian } 1191218065Sadrian 1192218154Sadrian /* packet header may have moved, reset our local pointer */ 1193218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1194218065Sadrian 1195218065Sadrian pktlen += IEEE80211_CRC_LEN; 1196218065Sadrian 1197218065Sadrian /* 1198218065Sadrian * Load the DMA map so any coalescing is done. This 1199218065Sadrian * also calculates the number of descriptors we need. 1200218065Sadrian */ 1201218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1202218065Sadrian if (error != 0) 1203218065Sadrian return error; 1204218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1205218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1206218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1207218065Sadrian 1208218065Sadrian /* setup descriptors */ 1209218065Sadrian ds = bf->bf_desc; 1210218065Sadrian rt = sc->sc_currates; 1211218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1212218065Sadrian 1213218065Sadrian /* 1214218065Sadrian * NB: the 802.11 layer marks whether or not we should 1215218065Sadrian * use short preamble based on the current mode and 1216218065Sadrian * negotiated parameters. 1217218065Sadrian */ 1218218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1219218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1220218065Sadrian shortPreamble = AH_TRUE; 1221218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1222218065Sadrian } else { 1223218065Sadrian shortPreamble = AH_FALSE; 1224218065Sadrian } 1225218065Sadrian 1226218065Sadrian an = ATH_NODE(ni); 1227218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1228218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1229218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1230218065Sadrian /* XXX use txparams instead of fixed values */ 1231218065Sadrian /* 1232218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1233218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1234218065Sadrian */ 1235218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1236218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1237218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1238218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1239218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1240218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1241218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1242218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1243218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1244218065Sadrian else 1245218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1246218065Sadrian rix = an->an_mgmtrix; 1247218065Sadrian txrate = rt->info[rix].rateCode; 1248218065Sadrian if (shortPreamble) 1249218065Sadrian txrate |= rt->info[rix].shortPreamble; 1250218065Sadrian try0 = ATH_TXMGTTRY; 1251218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1252218065Sadrian break; 1253218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1254218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1255218065Sadrian rix = an->an_mgmtrix; 1256218065Sadrian txrate = rt->info[rix].rateCode; 1257218065Sadrian if (shortPreamble) 1258218065Sadrian txrate |= rt->info[rix].shortPreamble; 1259218065Sadrian try0 = ATH_TXMGTTRY; 1260218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1261218065Sadrian break; 1262218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1263218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1264218065Sadrian /* 1265218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1266218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1267218065Sadrian * the rate control module for the rate to use. 1268218065Sadrian */ 1269218065Sadrian if (ismcast) { 1270218065Sadrian rix = an->an_mcastrix; 1271218065Sadrian txrate = rt->info[rix].rateCode; 1272218065Sadrian if (shortPreamble) 1273218065Sadrian txrate |= rt->info[rix].shortPreamble; 1274218065Sadrian try0 = 1; 1275218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1276218065Sadrian /* XXX? maybe always use long preamble? */ 1277218065Sadrian rix = an->an_mgmtrix; 1278218065Sadrian txrate = rt->info[rix].rateCode; 1279218065Sadrian if (shortPreamble) 1280218065Sadrian txrate |= rt->info[rix].shortPreamble; 1281218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1282218065Sadrian } else { 1283227364Sadrian /* 1284227364Sadrian * Do rate lookup on each TX, rather than using 1285227364Sadrian * the hard-coded TX information decided here. 1286227364Sadrian */ 1287227364Sadrian ismrr = 1; 1288227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1289218065Sadrian } 1290218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1291218065Sadrian flags |= HAL_TXDESC_NOACK; 1292218065Sadrian break; 1293218065Sadrian default: 1294218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1295218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1296218065Sadrian /* XXX statistic */ 1297218065Sadrian ath_freetx(m0); 1298218065Sadrian return EIO; 1299218065Sadrian } 1300218065Sadrian 1301235750Sadrian /* Check if the TXQ wouldn't match what the hardware TXQ is! */ 1302235750Sadrian if (txq != sc->sc_ac2q[pri]) { 1303235750Sadrian device_printf(sc->sc_dev, 1304235750Sadrian "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n", 1305235750Sadrian __func__, 1306235750Sadrian txq, 1307235750Sadrian txq->axq_qnum, 1308235750Sadrian pri, 1309235750Sadrian sc->sc_ac2q[pri], 1310235750Sadrian sc->sc_ac2q[pri]->axq_qnum); 1311235750Sadrian } 1312235750Sadrian 1313218065Sadrian /* 1314218065Sadrian * Calculate miscellaneous flags. 1315218065Sadrian */ 1316218065Sadrian if (ismcast) { 1317218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1318218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1319218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1320218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1321218065Sadrian sc->sc_stats.ast_tx_rts++; 1322218065Sadrian } 1323218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1324218065Sadrian sc->sc_stats.ast_tx_noack++; 1325218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1326218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1327218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1328218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1329218065Sadrian sc->sc_stats.ast_tdma_ack++; 1330218065Sadrian ath_freetx(m0); 1331218065Sadrian return EIO; 1332218065Sadrian } 1333218065Sadrian#endif 1334218065Sadrian 1335218065Sadrian /* 1336227364Sadrian * Determine if a tx interrupt should be generated for 1337227364Sadrian * this descriptor. We take a tx interrupt to reap 1338227364Sadrian * descriptors when the h/w hits an EOL condition or 1339227364Sadrian * when the descriptor is specifically marked to generate 1340227364Sadrian * an interrupt. We periodically mark descriptors in this 1341227364Sadrian * way to insure timely replenishing of the supply needed 1342227364Sadrian * for sending frames. Defering interrupts reduces system 1343227364Sadrian * load and potentially allows more concurrent work to be 1344227364Sadrian * done but if done to aggressively can cause senders to 1345227364Sadrian * backup. 1346227364Sadrian * 1347227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1348227364Sadrian * dynamically through sysctl. 1349218065Sadrian */ 1350227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1351227364Sadrian txq->axq_intrcnt = 0; 1352227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1353227364Sadrian flags |= HAL_TXDESC_INTREQ; 1354227364Sadrian txq->axq_intrcnt = 0; 1355227364Sadrian } 1356218932Sadrian 1357227364Sadrian /* This point forward is actual TX bits */ 1358218065Sadrian 1359218065Sadrian /* 1360218065Sadrian * At this point we are committed to sending the frame 1361218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1362218065Sadrian * case this frame is part of frag chain. 1363218065Sadrian */ 1364218065Sadrian m0->m_nextpkt = NULL; 1365218065Sadrian 1366218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1367218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1368218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1369218065Sadrian 1370218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1371218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1372218065Sadrian 1373218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1374218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1375218065Sadrian if (iswep) 1376218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1377218065Sadrian if (isfrag) 1378218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1379218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1380218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1381218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1382218065Sadrian 1383218065Sadrian ieee80211_radiotap_tx(vap, m0); 1384218065Sadrian } 1385218065Sadrian 1386227364Sadrian /* Blank the legacy rate array */ 1387227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1388227364Sadrian 1389218065Sadrian /* 1390227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1391227364Sadrian * the rate scenario. 1392227364Sadrian */ 1393227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1394227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1395227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1396227364Sadrian 1397227364Sadrian /* Store the decided rate index values away */ 1398227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1399227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1400227364Sadrian bf->bf_state.bfs_atype = atype; 1401227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1402227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1403227364Sadrian bf->bf_state.bfs_try0 = try0; 1404227364Sadrian bf->bf_state.bfs_keyix = keyix; 1405227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1406233966Sadrian bf->bf_state.bfs_txflags = flags; 1407227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1408227364Sadrian 1409227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1410227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1411227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1412227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1413227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1414227364Sadrian 1415227364Sadrian return 0; 1416227364Sadrian} 1417227364Sadrian 1418227364Sadrian/* 1419227364Sadrian * Direct-dispatch the current frame to the hardware. 1420227364Sadrian * 1421227364Sadrian * This can be called by the net80211 code. 1422227364Sadrian * 1423227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1424227364Sadrian * XXX aggregate scheduler so its serialised? 1425227364Sadrian */ 1426227364Sadrianint 1427227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1428227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1429227364Sadrian{ 1430227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1431227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1432232764Sadrian int r = 0; 1433227364Sadrian u_int pri; 1434227364Sadrian int tid; 1435227364Sadrian struct ath_txq *txq; 1436227364Sadrian int ismcast; 1437227364Sadrian const struct ieee80211_frame *wh; 1438227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1439236872Sadrian ieee80211_seq seqno; 1440227364Sadrian uint8_t type, subtype; 1441227364Sadrian 1442227364Sadrian /* 1443227364Sadrian * Determine the target hardware queue. 1444218065Sadrian * 1445234009Sadrian * For multicast frames, the txq gets overridden appropriately 1446234009Sadrian * depending upon the state of PS. 1447227364Sadrian * 1448227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1449227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1450227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1451227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1452227364Sadrian * having a node TID queued to multiple hardware TXQs. 1453227364Sadrian * This may change in the future but would require some locking 1454227364Sadrian * fudgery. 1455218065Sadrian */ 1456227364Sadrian pri = ath_tx_getac(sc, m0); 1457227364Sadrian tid = ath_tx_gettid(sc, m0); 1458218065Sadrian 1459227364Sadrian txq = sc->sc_ac2q[pri]; 1460227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1461227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1462227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1463227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1464227364Sadrian 1465232764Sadrian /* 1466232764Sadrian * Enforce how deep the multicast queue can grow. 1467232764Sadrian * 1468232764Sadrian * XXX duplicated in ath_raw_xmit(). 1469232764Sadrian */ 1470232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1471232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1472232764Sadrian 1473232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1474232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1475232764Sadrian r = ENOBUFS; 1476232764Sadrian } 1477232764Sadrian 1478232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1479232764Sadrian 1480232764Sadrian if (r != 0) { 1481232764Sadrian m_freem(m0); 1482232764Sadrian return r; 1483232764Sadrian } 1484232764Sadrian } 1485232764Sadrian 1486227364Sadrian /* A-MPDU TX */ 1487227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1488227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1489227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1490227364Sadrian 1491236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1492236872Sadrian __func__, tid, pri, is_ampdu); 1493227364Sadrian 1494232753Sadrian /* 1495234009Sadrian * When servicing one or more stations in power-save mode 1496234009Sadrian * (or) if there is some mcast data waiting on the mcast 1497234009Sadrian * queue (to prevent out of order delivery) multicast frames 1498234009Sadrian * must be bufferd until after the beacon. 1499234009Sadrian * 1500234009Sadrian * TODO: we should lock the mcastq before we check the length. 1501232753Sadrian */ 1502234009Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1503227364Sadrian txq = &avp->av_mcastq; 1504227364Sadrian 1505227364Sadrian /* Do the generic frame setup */ 1506227364Sadrian /* XXX should just bzero the bf_state? */ 1507227364Sadrian bf->bf_state.bfs_dobaw = 0; 1508227364Sadrian 1509227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1510227364Sadrian /* Don't do it whilst pending; the net80211 layer still assigns them */ 1511227364Sadrian /* XXX do we need locking here? */ 1512227364Sadrian if (is_ampdu_tx) { 1513227364Sadrian ATH_TXQ_LOCK(txq); 1514227364Sadrian /* 1515227364Sadrian * Always call; this function will 1516227364Sadrian * handle making sure that null data frames 1517227364Sadrian * don't get a sequence number from the current 1518227364Sadrian * TID and thus mess with the BAW. 1519227364Sadrian */ 1520236872Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1521236872Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1522236872Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1523227364Sadrian bf->bf_state.bfs_dobaw = 1; 1524227364Sadrian } 1525227364Sadrian ATH_TXQ_UNLOCK(txq); 1526233227Sadrian } else { 1527233227Sadrian /* No AMPDU TX, we've been assigned a sequence number. */ 1528233227Sadrian if (IEEE80211_QOS_HAS_SEQ(wh)) { 1529233330Sadrian /* XXX we should store the frag+seqno in bfs_seqno */ 1530233227Sadrian bf->bf_state.bfs_seqno = 1531233227Sadrian M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1532233227Sadrian } 1533218240Sadrian } 1534218240Sadrian 1535218065Sadrian /* 1536227364Sadrian * If needed, the sequence number has been assigned. 1537227364Sadrian * Squirrel it away somewhere easy to get to. 1538218065Sadrian */ 1539236872Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1540227364Sadrian 1541227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1542227364Sadrian if (is_ampdu_pending) 1543227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1544227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1545227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1546227364Sadrian 1547227364Sadrian /* This also sets up the DMA map */ 1548234009Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0, txq); 1549227364Sadrian 1550227364Sadrian if (r != 0) 1551227364Sadrian return r; 1552227364Sadrian 1553227364Sadrian /* At this point m0 could have changed! */ 1554227364Sadrian m0 = bf->bf_m; 1555227364Sadrian 1556227364Sadrian#if 1 1557218065Sadrian /* 1558227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1559227364Sadrian * destination hardware queue. Don't bother software 1560227364Sadrian * queuing it. 1561218065Sadrian */ 1562227364Sadrian /* 1563227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1564227364Sadrian * destination hardware queue. Don't bother software 1565227364Sadrian * queuing it, as the TID will now be paused. 1566227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1567227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1568227364Sadrian * It queues directly to hardware because the TID is paused 1569227364Sadrian * at this point (and won't be unpaused until the BAR has 1570227364Sadrian * either been TXed successfully or max retries has been 1571227364Sadrian * reached.) 1572227364Sadrian */ 1573227364Sadrian if (txq == &avp->av_mcastq) { 1574235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1575233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1576227364Sadrian ATH_TXQ_LOCK(txq); 1577227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1578227364Sadrian ATH_TXQ_UNLOCK(txq); 1579227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1580227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1581235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1582227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1583227364Sadrian ATH_TXQ_LOCK(txq); 1584227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1585227364Sadrian ATH_TXQ_UNLOCK(txq); 1586227364Sadrian } else { 1587227364Sadrian /* add to software queue */ 1588235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1589233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1590227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1591227364Sadrian } 1592227364Sadrian#else 1593227364Sadrian /* 1594227364Sadrian * For now, since there's no software queue, 1595227364Sadrian * direct-dispatch to the hardware. 1596227364Sadrian */ 1597227364Sadrian ATH_TXQ_LOCK(txq); 1598227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1599227364Sadrian ATH_TXQ_UNLOCK(txq); 1600227364Sadrian#endif 1601218065Sadrian 1602218065Sadrian return 0; 1603218065Sadrian} 1604218065Sadrian 1605218065Sadrianstatic int 1606218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1607218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1608218065Sadrian const struct ieee80211_bpf_params *params) 1609218065Sadrian{ 1610218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1611218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1612218065Sadrian struct ath_hal *ah = sc->sc_ah; 1613218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1614218065Sadrian int error, ismcast, ismrr; 1615218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1616227364Sadrian u_int8_t rix, txrate; 1617218065Sadrian struct ieee80211_frame *wh; 1618227364Sadrian u_int flags; 1619218065Sadrian HAL_PKT_TYPE atype; 1620218065Sadrian const HAL_RATE_TABLE *rt; 1621218065Sadrian struct ath_desc *ds; 1622218065Sadrian u_int pri; 1623227364Sadrian int o_tid = -1; 1624227364Sadrian int do_override; 1625218065Sadrian 1626218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1627218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1628218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1629218065Sadrian /* 1630218065Sadrian * Packet length must not include any 1631218065Sadrian * pad bytes; deduct them here. 1632218065Sadrian */ 1633218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1634218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1635218065Sadrian 1636227364Sadrian 1637227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1638227364Sadrian __func__, ismcast); 1639227364Sadrian 1640218154Sadrian /* Handle encryption twiddling if needed */ 1641227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1642227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1643227364Sadrian &hdrlen, &pktlen, &keyix)) { 1644218154Sadrian ath_freetx(m0); 1645218154Sadrian return EIO; 1646218154Sadrian } 1647218154Sadrian /* packet header may have moved, reset our local pointer */ 1648218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1649218065Sadrian 1650227364Sadrian /* Do the generic frame setup */ 1651227364Sadrian /* XXX should just bzero the bf_state? */ 1652227364Sadrian bf->bf_state.bfs_dobaw = 0; 1653227364Sadrian 1654218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1655218065Sadrian if (error != 0) 1656218065Sadrian return error; 1657218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1658218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1659218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1660218065Sadrian 1661218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1662218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1663218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1664218065Sadrian flags |= HAL_TXDESC_RTSENA; 1665227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1666227364Sadrian /* XXX assume 11g/11n protection? */ 1667227364Sadrian bf->bf_state.bfs_doprot = 1; 1668218065Sadrian flags |= HAL_TXDESC_CTSENA; 1669227364Sadrian } 1670218065Sadrian /* XXX leave ismcast to injector? */ 1671218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1672218065Sadrian flags |= HAL_TXDESC_NOACK; 1673218065Sadrian 1674218065Sadrian rt = sc->sc_currates; 1675218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1676218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1677218065Sadrian txrate = rt->info[rix].rateCode; 1678218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1679218065Sadrian txrate |= rt->info[rix].shortPreamble; 1680218065Sadrian sc->sc_txrix = rix; 1681218065Sadrian try0 = params->ibp_try0; 1682218065Sadrian ismrr = (params->ibp_try1 != 0); 1683218065Sadrian txantenna = params->ibp_pri >> 2; 1684218065Sadrian if (txantenna == 0) /* XXX? */ 1685218065Sadrian txantenna = sc->sc_txantenna; 1686218157Sadrian 1687227364Sadrian /* 1688227364Sadrian * Since ctsrate is fixed, store it away for later 1689227364Sadrian * use when the descriptor fields are being set. 1690227364Sadrian */ 1691227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1692227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1693218157Sadrian 1694218065Sadrian pri = params->ibp_pri & 3; 1695227364Sadrian /* Override pri if the frame isn't a QoS one */ 1696227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1697227364Sadrian pri = ath_tx_getac(sc, m0); 1698227364Sadrian 1699218065Sadrian /* 1700218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1701218065Sadrian * set the sequence number, duration, etc. 1702218065Sadrian */ 1703218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1704218065Sadrian 1705218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1706218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1707218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1708218065Sadrian 1709218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1710218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1711218065Sadrian 1712218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1713218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1714218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1715218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1716218065Sadrian if (m0->m_flags & M_FRAG) 1717218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1718218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1719218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1720218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1721218065Sadrian 1722218065Sadrian ieee80211_radiotap_tx(vap, m0); 1723218065Sadrian } 1724218065Sadrian 1725218065Sadrian /* 1726218065Sadrian * Formulate first tx descriptor with tx controls. 1727218065Sadrian */ 1728218065Sadrian ds = bf->bf_desc; 1729218065Sadrian /* XXX check return value? */ 1730227364Sadrian 1731227364Sadrian /* Store the decided rate index values away */ 1732227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1733227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1734227364Sadrian bf->bf_state.bfs_atype = atype; 1735227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1736227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1737227364Sadrian bf->bf_state.bfs_try0 = try0; 1738227364Sadrian bf->bf_state.bfs_keyix = keyix; 1739227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1740233966Sadrian bf->bf_state.bfs_txflags = flags; 1741227364Sadrian bf->bf_state.bfs_shpream = 1742227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1743218065Sadrian 1744227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1745227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1746227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1747227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1748218240Sadrian 1749227364Sadrian /* Blank the legacy rate array */ 1750227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1751218240Sadrian 1752227364Sadrian bf->bf_state.bfs_rc[0].rix = 1753227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1754227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1755227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1756227364Sadrian 1757227364Sadrian if (ismrr) { 1758227364Sadrian int rix; 1759227364Sadrian 1760227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1761227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1762227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1763227364Sadrian 1764227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1765227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1766227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1767227364Sadrian 1768227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1769227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1770227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1771218065Sadrian } 1772227364Sadrian /* 1773227364Sadrian * All the required rate control decisions have been made; 1774227364Sadrian * fill in the rc flags. 1775227364Sadrian */ 1776227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1777218065Sadrian 1778227364Sadrian /* NB: no buffered multicast in power save support */ 1779227364Sadrian 1780227364Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1781227364Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1782227364Sadrian 1783227364Sadrian /* Map ADDBA to the correct priority */ 1784227364Sadrian if (do_override) { 1785227364Sadrian#if 0 1786227364Sadrian device_printf(sc->sc_dev, 1787227364Sadrian "%s: overriding tid %d pri %d -> %d\n", 1788227364Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1789227364Sadrian#endif 1790227364Sadrian pri = TID_TO_WME_AC(o_tid); 1791218240Sadrian } 1792218240Sadrian 1793227364Sadrian /* 1794227364Sadrian * If we're overiding the ADDBA destination, dump directly 1795227364Sadrian * into the hardware queue, right after any pending 1796227364Sadrian * frames to that node are. 1797227364Sadrian */ 1798227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1799227364Sadrian __func__, do_override); 1800227364Sadrian 1801227364Sadrian if (do_override) { 1802227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1803227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1804227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1805227364Sadrian } else { 1806227364Sadrian /* Queue to software queue */ 1807227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1808227364Sadrian } 1809227364Sadrian 1810218065Sadrian return 0; 1811218065Sadrian} 1812218065Sadrian 1813227364Sadrian/* 1814227364Sadrian * Send a raw frame. 1815227364Sadrian * 1816227364Sadrian * This can be called by net80211. 1817227364Sadrian */ 1818218065Sadrianint 1819218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1820218065Sadrian const struct ieee80211_bpf_params *params) 1821218065Sadrian{ 1822218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1823218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1824218065Sadrian struct ath_softc *sc = ifp->if_softc; 1825218065Sadrian struct ath_buf *bf; 1826232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1827232764Sadrian int error = 0; 1828218065Sadrian 1829227651Sadrian ATH_PCU_LOCK(sc); 1830227651Sadrian if (sc->sc_inreset_cnt > 0) { 1831227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 1832227651Sadrian __func__); 1833227651Sadrian error = EIO; 1834227651Sadrian ATH_PCU_UNLOCK(sc); 1835227651Sadrian goto bad0; 1836227651Sadrian } 1837227651Sadrian sc->sc_txstart_cnt++; 1838227651Sadrian ATH_PCU_UNLOCK(sc); 1839227651Sadrian 1840218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 1841218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 1842218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 1843218065Sadrian "!running" : "invalid"); 1844218065Sadrian m_freem(m); 1845218065Sadrian error = ENETDOWN; 1846218065Sadrian goto bad; 1847218065Sadrian } 1848232764Sadrian 1849218065Sadrian /* 1850232764Sadrian * Enforce how deep the multicast queue can grow. 1851232764Sadrian * 1852232764Sadrian * XXX duplicated in ath_tx_start(). 1853232764Sadrian */ 1854232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1855232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1856232764Sadrian 1857232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1858232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1859232764Sadrian error = ENOBUFS; 1860232764Sadrian } 1861232764Sadrian 1862232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1863232764Sadrian 1864232764Sadrian if (error != 0) { 1865232764Sadrian m_freem(m); 1866232764Sadrian goto bad; 1867232764Sadrian } 1868232764Sadrian } 1869232764Sadrian 1870232764Sadrian /* 1871218065Sadrian * Grab a TX buffer and associated resources. 1872218065Sadrian */ 1873218065Sadrian bf = ath_getbuf(sc); 1874218065Sadrian if (bf == NULL) { 1875218065Sadrian sc->sc_stats.ast_tx_nobuf++; 1876218065Sadrian m_freem(m); 1877218065Sadrian error = ENOBUFS; 1878218065Sadrian goto bad; 1879218065Sadrian } 1880218065Sadrian 1881218065Sadrian if (params == NULL) { 1882218065Sadrian /* 1883218065Sadrian * Legacy path; interpret frame contents to decide 1884218065Sadrian * precisely how to send the frame. 1885218065Sadrian */ 1886218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 1887218065Sadrian error = EIO; /* XXX */ 1888218065Sadrian goto bad2; 1889218065Sadrian } 1890218065Sadrian } else { 1891218065Sadrian /* 1892218065Sadrian * Caller supplied explicit parameters to use in 1893218065Sadrian * sending the frame. 1894218065Sadrian */ 1895218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 1896218065Sadrian error = EIO; /* XXX */ 1897218065Sadrian goto bad2; 1898218065Sadrian } 1899218065Sadrian } 1900218065Sadrian sc->sc_wd_timer = 5; 1901218065Sadrian ifp->if_opackets++; 1902218065Sadrian sc->sc_stats.ast_tx_raw++; 1903218065Sadrian 1904227651Sadrian ATH_PCU_LOCK(sc); 1905227651Sadrian sc->sc_txstart_cnt--; 1906227651Sadrian ATH_PCU_UNLOCK(sc); 1907227651Sadrian 1908218065Sadrian return 0; 1909218065Sadrianbad2: 1910218065Sadrian ATH_TXBUF_LOCK(sc); 1911227344Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); 1912218065Sadrian ATH_TXBUF_UNLOCK(sc); 1913218065Sadrianbad: 1914227651Sadrian ATH_PCU_LOCK(sc); 1915227651Sadrian sc->sc_txstart_cnt--; 1916227651Sadrian ATH_PCU_UNLOCK(sc); 1917227651Sadrianbad0: 1918218065Sadrian ifp->if_oerrors++; 1919218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 1920218065Sadrian ieee80211_free_node(ni); 1921227651Sadrian 1922218065Sadrian return error; 1923218065Sadrian} 1924227364Sadrian 1925227364Sadrian/* Some helper functions */ 1926227364Sadrian 1927227364Sadrian/* 1928227364Sadrian * ADDBA (and potentially others) need to be placed in the same 1929227364Sadrian * hardware queue as the TID/node it's relating to. This is so 1930227364Sadrian * it goes out after any pending non-aggregate frames to the 1931227364Sadrian * same node/TID. 1932227364Sadrian * 1933227364Sadrian * If this isn't done, the ADDBA can go out before the frames 1934227364Sadrian * queued in hardware. Even though these frames have a sequence 1935227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 1936227364Sadrian * no frames whose sequence numbers are after the ADDBA should 1937227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 1938227364Sadrian * will simply drop them as being out of the BAW. 1939227364Sadrian * 1940227364Sadrian * The frames can't be appended to the TID software queue - it'll 1941227364Sadrian * never be sent out. So these frames have to be directly 1942227364Sadrian * dispatched to the hardware, rather than queued in software. 1943227364Sadrian * So if this function returns true, the TXQ has to be 1944227364Sadrian * overridden and it has to be directly dispatched. 1945227364Sadrian * 1946227364Sadrian * It's a dirty hack, but someone's gotta do it. 1947227364Sadrian */ 1948227364Sadrian 1949227364Sadrian/* 1950227364Sadrian * XXX doesn't belong here! 1951227364Sadrian */ 1952227364Sadrianstatic int 1953227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 1954227364Sadrian{ 1955227364Sadrian /* Type: Management frame? */ 1956227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 1957227364Sadrian IEEE80211_FC0_TYPE_MGT) 1958227364Sadrian return 0; 1959227364Sadrian 1960227364Sadrian /* Subtype: Action frame? */ 1961227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 1962227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 1963227364Sadrian return 0; 1964227364Sadrian 1965227364Sadrian return 1; 1966227364Sadrian} 1967227364Sadrian 1968227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1969227364Sadrian/* 1970227364Sadrian * Return an alternate TID for ADDBA request frames. 1971227364Sadrian * 1972227364Sadrian * Yes, this likely should be done in the net80211 layer. 1973227364Sadrian */ 1974227364Sadrianstatic int 1975227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 1976227364Sadrian struct ieee80211_node *ni, 1977227364Sadrian struct mbuf *m0, int *tid) 1978227364Sadrian{ 1979227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 1980227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 1981227364Sadrian uint8_t *frm; 1982227364Sadrian uint16_t baparamset; 1983227364Sadrian 1984227364Sadrian /* Not action frame? Bail */ 1985227364Sadrian if (! ieee80211_is_action(wh)) 1986227364Sadrian return 0; 1987227364Sadrian 1988227364Sadrian /* XXX Not needed for frames we send? */ 1989227364Sadrian#if 0 1990227364Sadrian /* Correct length? */ 1991227364Sadrian if (! ieee80211_parse_action(ni, m)) 1992227364Sadrian return 0; 1993227364Sadrian#endif 1994227364Sadrian 1995227364Sadrian /* Extract out action frame */ 1996227364Sadrian frm = (u_int8_t *)&wh[1]; 1997227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 1998227364Sadrian 1999227364Sadrian /* Not ADDBA? Bail */ 2000227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 2001227364Sadrian return 0; 2002227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 2003227364Sadrian return 0; 2004227364Sadrian 2005227364Sadrian /* Extract TID, return it */ 2006227364Sadrian baparamset = le16toh(ia->rq_baparamset); 2007227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 2008227364Sadrian 2009227364Sadrian return 1; 2010227364Sadrian} 2011227364Sadrian#undef MS 2012227364Sadrian 2013227364Sadrian/* Per-node software queue operations */ 2014227364Sadrian 2015227364Sadrian/* 2016227364Sadrian * Add the current packet to the given BAW. 2017227364Sadrian * It is assumed that the current packet 2018227364Sadrian * 2019227364Sadrian * + fits inside the BAW; 2020227364Sadrian * + already has had a sequence number allocated. 2021227364Sadrian * 2022227364Sadrian * Since the BAW status may be modified by both the ath task and 2023227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2024227364Sadrian */ 2025227364Sadrianvoid 2026227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 2027227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 2028227364Sadrian{ 2029227364Sadrian int index, cindex; 2030227364Sadrian struct ieee80211_tx_ampdu *tap; 2031227364Sadrian 2032227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2033236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2034227364Sadrian 2035227364Sadrian if (bf->bf_state.bfs_isretried) 2036227364Sadrian return; 2037227364Sadrian 2038227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2039227364Sadrian 2040227364Sadrian if (bf->bf_state.bfs_addedbaw) 2041227364Sadrian device_printf(sc->sc_dev, 2042236872Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 2043229949Sadrian "baw head=%d tail=%d\n", 2044236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2045229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2046229949Sadrian tid->baw_tail); 2047227364Sadrian 2048227364Sadrian /* 2049227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2050227364Sadrian * the txa state contains the current baw start. 2051227364Sadrian */ 2052227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2053227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2054227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2055236872Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2056229949Sadrian "baw head=%d tail=%d\n", 2057236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2058229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2059229949Sadrian tid->baw_tail); 2060227364Sadrian 2061227364Sadrian 2062227364Sadrian#if 0 2063227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2064227364Sadrian#endif 2065227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2066227364Sadrian device_printf(sc->sc_dev, 2067227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2068227364Sadrian "head=%d, tail=%d)\n", 2069227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2070227364Sadrian device_printf(sc->sc_dev, 2071227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2072227364Sadrian __func__, 2073227364Sadrian tid->tx_buf[cindex], 2074227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2075227364Sadrian bf, 2076227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2077227364Sadrian ); 2078227364Sadrian } 2079227364Sadrian tid->tx_buf[cindex] = bf; 2080227364Sadrian 2081229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2082229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2083227364Sadrian tid->baw_tail = cindex; 2084227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2085227364Sadrian } 2086227364Sadrian} 2087227364Sadrian 2088227364Sadrian/* 2089227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2090227398Sadrian * 2091227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2092227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2093227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2094227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2095227398Sadrian * tracking array to maintain consistency. 2096227398Sadrian */ 2097227398Sadrianstatic void 2098227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2099227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2100227398Sadrian{ 2101227398Sadrian int index, cindex; 2102227398Sadrian struct ieee80211_tx_ampdu *tap; 2103227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2104227398Sadrian 2105227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2106236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2107227398Sadrian 2108227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2109227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2110227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2111227398Sadrian 2112227398Sadrian /* 2113227398Sadrian * Just warn for now; if it happens then we should find out 2114227398Sadrian * about it. It's highly likely the aggregation session will 2115227398Sadrian * soon hang. 2116227398Sadrian */ 2117227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2118227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2119227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2120227398Sadrian __func__); 2121227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2122227398Sadrian __func__, 2123227398Sadrian old_bf->bf_state.bfs_seqno, 2124227398Sadrian new_bf->bf_state.bfs_seqno); 2125227398Sadrian } 2126227398Sadrian 2127227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2128227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2129227398Sadrian " has m BA session may hang.\n", 2130227398Sadrian __func__); 2131227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2132227398Sadrian __func__, 2133227398Sadrian old_bf, new_bf); 2134227398Sadrian } 2135227398Sadrian 2136227398Sadrian tid->tx_buf[cindex] = new_bf; 2137227398Sadrian} 2138227398Sadrian 2139227398Sadrian/* 2140227364Sadrian * seq_start - left edge of BAW 2141227364Sadrian * seq_next - current/next sequence number to allocate 2142227364Sadrian * 2143227364Sadrian * Since the BAW status may be modified by both the ath task and 2144227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2145227364Sadrian */ 2146227364Sadrianstatic void 2147227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2148227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2149227364Sadrian{ 2150227364Sadrian int index, cindex; 2151227364Sadrian struct ieee80211_tx_ampdu *tap; 2152227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2153227364Sadrian 2154227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2155227364Sadrian 2156227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2157227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2158227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2159227364Sadrian 2160227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2161236872Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2162229949Sadrian "baw head=%d, tail=%d\n", 2163236872Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2164227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2165227364Sadrian 2166227364Sadrian /* 2167227364Sadrian * If this occurs then we have a big problem - something else 2168227364Sadrian * has slid tap->txa_start along without updating the BAW 2169227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2170227364Sadrian * completely busted. 2171227364Sadrian * 2172227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2173227364Sadrian * it's quite possible that a cloned buffer is making its way 2174227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2175227364Sadrian */ 2176227364Sadrian if (tid->tx_buf[cindex] != bf) { 2177227364Sadrian device_printf(sc->sc_dev, 2178227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2179227364Sadrian __func__, 2180227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2181227364Sadrian tid->tx_buf[cindex], 2182227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2183227364Sadrian } 2184227364Sadrian 2185227364Sadrian tid->tx_buf[cindex] = NULL; 2186227364Sadrian 2187229949Sadrian while (tid->baw_head != tid->baw_tail && 2188229949Sadrian !tid->tx_buf[tid->baw_head]) { 2189227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2190227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2191227364Sadrian } 2192229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2193229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2194227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2195227364Sadrian} 2196227364Sadrian 2197227364Sadrian/* 2198227364Sadrian * Mark the current node/TID as ready to TX. 2199227364Sadrian * 2200227364Sadrian * This is done to make it easy for the software scheduler to 2201227364Sadrian * find which nodes have data to send. 2202227364Sadrian * 2203227364Sadrian * The TXQ lock must be held. 2204227364Sadrian */ 2205227364Sadrianstatic void 2206227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2207227364Sadrian{ 2208227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2209227364Sadrian 2210227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2211227364Sadrian 2212227364Sadrian if (tid->paused) 2213227364Sadrian return; /* paused, can't schedule yet */ 2214227364Sadrian 2215227364Sadrian if (tid->sched) 2216227364Sadrian return; /* already scheduled */ 2217227364Sadrian 2218227364Sadrian tid->sched = 1; 2219227364Sadrian 2220227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2221227364Sadrian} 2222227364Sadrian 2223227364Sadrian/* 2224227364Sadrian * Mark the current node as no longer needing to be polled for 2225227364Sadrian * TX packets. 2226227364Sadrian * 2227227364Sadrian * The TXQ lock must be held. 2228227364Sadrian */ 2229227364Sadrianstatic void 2230227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2231227364Sadrian{ 2232227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2233227364Sadrian 2234227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2235227364Sadrian 2236227364Sadrian if (tid->sched == 0) 2237227364Sadrian return; 2238227364Sadrian 2239227364Sadrian tid->sched = 0; 2240227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2241227364Sadrian} 2242227364Sadrian 2243227364Sadrian/* 2244227364Sadrian * Assign a sequence number manually to the given frame. 2245227364Sadrian * 2246227364Sadrian * This should only be called for A-MPDU TX frames. 2247227364Sadrian */ 2248236872Sadrianstatic ieee80211_seq 2249227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2250227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2251227364Sadrian{ 2252227364Sadrian struct ieee80211_frame *wh; 2253227364Sadrian int tid, pri; 2254227364Sadrian ieee80211_seq seqno; 2255227364Sadrian uint8_t subtype; 2256227364Sadrian 2257227364Sadrian /* TID lookup */ 2258227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2259227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2260227364Sadrian tid = WME_AC_TO_TID(pri); 2261236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2262236872Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2263227364Sadrian 2264227364Sadrian /* XXX Is it a control frame? Ignore */ 2265227364Sadrian 2266227364Sadrian /* Does the packet require a sequence number? */ 2267227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2268227364Sadrian return -1; 2269227364Sadrian 2270227364Sadrian /* 2271227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2272227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2273227364Sadrian * 2274227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2275227364Sadrian * data frame sequence number in the aggregation state updates, so 2276227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2277227364Sadrian * RX side. 2278227364Sadrian */ 2279227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2280227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2281227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2282227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2283227364Sadrian } else { 2284227364Sadrian /* Manually assign sequence number */ 2285227364Sadrian seqno = ni->ni_txseqs[tid]; 2286227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2287227364Sadrian } 2288227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2289227364Sadrian M_SEQNO_SET(m0, seqno); 2290227364Sadrian 2291227364Sadrian /* Return so caller can do something with it if needed */ 2292236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2293227364Sadrian return seqno; 2294227364Sadrian} 2295227364Sadrian 2296227364Sadrian/* 2297227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2298227364Sadrian * If the frame is out of BAW, queue. 2299227364Sadrian * Otherwise, schedule it as a single frame. 2300227364Sadrian */ 2301227364Sadrianstatic void 2302227364Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, struct ath_buf *bf) 2303227364Sadrian{ 2304227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2305227364Sadrian struct ath_txq *txq = bf->bf_state.bfs_txq; 2306227364Sadrian struct ieee80211_tx_ampdu *tap; 2307227364Sadrian 2308227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2309236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2310227364Sadrian 2311227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2312227364Sadrian 2313227364Sadrian /* paused? queue */ 2314227364Sadrian if (tid->paused) { 2315227364Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2316233480Sadrian /* XXX don't sched - we're paused! */ 2317227364Sadrian return; 2318227364Sadrian } 2319227364Sadrian 2320227364Sadrian /* outside baw? queue */ 2321227364Sadrian if (bf->bf_state.bfs_dobaw && 2322227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2323227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2324227364Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2325227364Sadrian ath_tx_tid_sched(sc, tid); 2326227364Sadrian return; 2327227364Sadrian } 2328227364Sadrian 2329227364Sadrian /* Direct dispatch to hardware */ 2330227364Sadrian ath_tx_do_ratelookup(sc, bf); 2331233989Sadrian ath_tx_calc_duration(sc, bf); 2332233989Sadrian ath_tx_calc_protection(sc, bf); 2333233989Sadrian ath_tx_set_rtscts(sc, bf); 2334227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2335227364Sadrian ath_tx_setds(sc, bf); 2336227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 2337227364Sadrian ath_tx_chaindesclist(sc, bf); 2338227364Sadrian 2339227364Sadrian /* Statistics */ 2340227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2341227364Sadrian 2342227364Sadrian /* Track per-TID hardware queue depth correctly */ 2343227364Sadrian tid->hwq_depth++; 2344227364Sadrian 2345227364Sadrian /* Add to BAW */ 2346227364Sadrian if (bf->bf_state.bfs_dobaw) { 2347227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2348227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2349227364Sadrian } 2350227364Sadrian 2351227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2352227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2353227364Sadrian 2354227364Sadrian /* Hand off to hardware */ 2355227364Sadrian ath_tx_handoff(sc, txq, bf); 2356227364Sadrian} 2357227364Sadrian 2358227364Sadrian/* 2359227364Sadrian * Attempt to send the packet. 2360227364Sadrian * If the queue isn't busy, direct-dispatch. 2361227364Sadrian * If the queue is busy enough, queue the given packet on the 2362227364Sadrian * relevant software queue. 2363227364Sadrian */ 2364227364Sadrianvoid 2365227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2366227364Sadrian struct ath_buf *bf) 2367227364Sadrian{ 2368227364Sadrian struct ath_node *an = ATH_NODE(ni); 2369227364Sadrian struct ieee80211_frame *wh; 2370227364Sadrian struct ath_tid *atid; 2371227364Sadrian int pri, tid; 2372227364Sadrian struct mbuf *m0 = bf->bf_m; 2373227364Sadrian 2374227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2375227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2376227364Sadrian pri = ath_tx_getac(sc, m0); 2377227364Sadrian tid = ath_tx_gettid(sc, m0); 2378227364Sadrian atid = &an->an_tid[tid]; 2379227364Sadrian 2380236873Sadrian ATH_TID_LOCK_ASSERT(sc, atid); 2381236873Sadrian 2382236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2383236872Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2384227364Sadrian 2385227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2386227364Sadrian bf->bf_state.bfs_tid = tid; 2387227364Sadrian bf->bf_state.bfs_txq = txq; 2388227364Sadrian bf->bf_state.bfs_pri = pri; 2389227364Sadrian 2390227364Sadrian /* 2391227364Sadrian * If the hardware queue isn't busy, queue it directly. 2392227364Sadrian * If the hardware queue is busy, queue it. 2393227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2394227364Sadrian * queue it. 2395227364Sadrian */ 2396227364Sadrian ATH_TXQ_LOCK(txq); 2397227364Sadrian if (atid->paused) { 2398227364Sadrian /* TID is paused, queue */ 2399236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2400227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2401227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2402227364Sadrian /* AMPDU pending; queue */ 2403236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2404227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2405227364Sadrian /* XXX sched? */ 2406227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2407227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2408229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2409236872Sadrian ath_tx_xmit_aggr(sc, an, bf); 2410233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2411236872Sadrian "%s: xmit_aggr\n", 2412236872Sadrian __func__); 2413229949Sadrian } else { 2414229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2415236872Sadrian "%s: ampdu; swq'ing\n", 2416236872Sadrian __func__); 2417227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2418227364Sadrian ath_tx_tid_sched(sc, atid); 2419227364Sadrian } 2420227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2421227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2422236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2423227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2424227364Sadrian } else { 2425227364Sadrian /* Busy; queue */ 2426236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2427227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2428227364Sadrian ath_tx_tid_sched(sc, atid); 2429227364Sadrian } 2430227364Sadrian ATH_TXQ_UNLOCK(txq); 2431227364Sadrian} 2432227364Sadrian 2433227364Sadrian/* 2434227364Sadrian * Do the basic frame setup stuff that's required before the frame 2435227364Sadrian * is added to a software queue. 2436227364Sadrian * 2437227364Sadrian * All frames get mostly the same treatment and it's done once. 2438227364Sadrian * Retransmits fiddle with things like the rate control setup, 2439227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2440227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2441227364Sadrian * 2442227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2443227364Sadrian * m0 may not be valid. 2444227364Sadrian */ 2445227364Sadrian 2446227364Sadrian 2447227364Sadrian/* 2448227364Sadrian * Configure the per-TID node state. 2449227364Sadrian * 2450227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2451227364Sadrian * else to put it just yet. 2452227364Sadrian * 2453227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2454227364Sadrian */ 2455227364Sadrianvoid 2456227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2457227364Sadrian{ 2458227364Sadrian int i, j; 2459227364Sadrian struct ath_tid *atid; 2460227364Sadrian 2461227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2462227364Sadrian atid = &an->an_tid[i]; 2463227364Sadrian TAILQ_INIT(&atid->axq_q); 2464227364Sadrian atid->tid = i; 2465227364Sadrian atid->an = an; 2466227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2467227364Sadrian atid->tx_buf[j] = NULL; 2468227364Sadrian atid->baw_head = atid->baw_tail = 0; 2469227364Sadrian atid->paused = 0; 2470227364Sadrian atid->sched = 0; 2471227364Sadrian atid->hwq_depth = 0; 2472227364Sadrian atid->cleanup_inprogress = 0; 2473227364Sadrian if (i == IEEE80211_NONQOS_TID) 2474227364Sadrian atid->ac = WME_AC_BE; 2475227364Sadrian else 2476227364Sadrian atid->ac = TID_TO_WME_AC(i); 2477227364Sadrian } 2478227364Sadrian} 2479227364Sadrian 2480227364Sadrian/* 2481227364Sadrian * Pause the current TID. This stops packets from being transmitted 2482227364Sadrian * on it. 2483227364Sadrian * 2484227364Sadrian * Since this is also called from upper layers as well as the driver, 2485227364Sadrian * it will get the TID lock. 2486227364Sadrian */ 2487227364Sadrianstatic void 2488227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2489227364Sadrian{ 2490233908Sadrian 2491233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2492227364Sadrian tid->paused++; 2493227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2494227364Sadrian __func__, tid->paused); 2495227364Sadrian} 2496227364Sadrian 2497227364Sadrian/* 2498227364Sadrian * Unpause the current TID, and schedule it if needed. 2499227364Sadrian */ 2500227364Sadrianstatic void 2501227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2502227364Sadrian{ 2503227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2504227364Sadrian 2505227364Sadrian tid->paused--; 2506227364Sadrian 2507227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2508227364Sadrian __func__, tid->paused); 2509227364Sadrian 2510227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2511227364Sadrian return; 2512227364Sadrian } 2513227364Sadrian 2514227364Sadrian ath_tx_tid_sched(sc, tid); 2515227364Sadrian /* Punt some frames to the hardware if needed */ 2516233673Sadrian //ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2517233673Sadrian taskqueue_enqueue(sc->sc_tq, &sc->sc_txqtask); 2518227364Sadrian} 2519227364Sadrian 2520227364Sadrian/* 2521233908Sadrian * Suspend the queue because we need to TX a BAR. 2522233908Sadrian */ 2523233908Sadrianstatic void 2524233908Sadrianath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid) 2525233908Sadrian{ 2526233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2527233908Sadrian 2528235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2529235676Sadrian "%s: tid=%p, bar_wait=%d, bar_tx=%d, called\n", 2530233908Sadrian __func__, 2531235676Sadrian tid, 2532235676Sadrian tid->bar_wait, 2533235676Sadrian tid->bar_tx); 2534233908Sadrian 2535233908Sadrian /* We shouldn't be called when bar_tx is 1 */ 2536233908Sadrian if (tid->bar_tx) { 2537233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx is 1?!\n", 2538233908Sadrian __func__); 2539233908Sadrian } 2540233908Sadrian 2541233908Sadrian /* If we've already been called, just be patient. */ 2542233908Sadrian if (tid->bar_wait) 2543233908Sadrian return; 2544233908Sadrian 2545233908Sadrian /* Wait! */ 2546233908Sadrian tid->bar_wait = 1; 2547233908Sadrian 2548233908Sadrian /* Only one pause, no matter how many frames fail */ 2549233908Sadrian ath_tx_tid_pause(sc, tid); 2550233908Sadrian} 2551233908Sadrian 2552233908Sadrian/* 2553233908Sadrian * We've finished with BAR handling - either we succeeded or 2554233908Sadrian * failed. Either way, unsuspend TX. 2555233908Sadrian */ 2556233908Sadrianstatic void 2557233908Sadrianath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid) 2558233908Sadrian{ 2559233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2560233908Sadrian 2561235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2562233908Sadrian "%s: tid=%p, called\n", 2563233908Sadrian __func__, 2564233908Sadrian tid); 2565233908Sadrian 2566233908Sadrian if (tid->bar_tx == 0 || tid->bar_wait == 0) { 2567233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx=%d, bar_wait=%d: ?\n", 2568233908Sadrian __func__, tid->bar_tx, tid->bar_wait); 2569233908Sadrian } 2570233908Sadrian 2571233908Sadrian tid->bar_tx = tid->bar_wait = 0; 2572233908Sadrian ath_tx_tid_resume(sc, tid); 2573233908Sadrian} 2574233908Sadrian 2575233908Sadrian/* 2576233908Sadrian * Return whether we're ready to TX a BAR frame. 2577233908Sadrian * 2578233908Sadrian * Requires the TID lock be held. 2579233908Sadrian */ 2580233908Sadrianstatic int 2581233908Sadrianath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid) 2582233908Sadrian{ 2583233908Sadrian 2584233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2585233908Sadrian 2586233908Sadrian if (tid->bar_wait == 0 || tid->hwq_depth > 0) 2587233908Sadrian return (0); 2588233908Sadrian 2589235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, "%s: tid=%p (%d), bar ready\n", 2590235491Sadrian __func__, tid, tid->tid); 2591235491Sadrian 2592233908Sadrian return (1); 2593233908Sadrian} 2594233908Sadrian 2595233908Sadrian/* 2596233908Sadrian * Check whether the current TID is ready to have a BAR 2597233908Sadrian * TXed and if so, do the TX. 2598233908Sadrian * 2599233908Sadrian * Since the TID/TXQ lock can't be held during a call to 2600233908Sadrian * ieee80211_send_bar(), we have to do the dirty thing of unlocking it, 2601233908Sadrian * sending the BAR and locking it again. 2602233908Sadrian * 2603233908Sadrian * Eventually, the code to send the BAR should be broken out 2604233908Sadrian * from this routine so the lock doesn't have to be reacquired 2605233908Sadrian * just to be immediately dropped by the caller. 2606233908Sadrian */ 2607233908Sadrianstatic void 2608233908Sadrianath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid) 2609233908Sadrian{ 2610233908Sadrian struct ieee80211_tx_ampdu *tap; 2611233908Sadrian 2612233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2613233908Sadrian 2614235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2615233908Sadrian "%s: tid=%p, called\n", 2616233908Sadrian __func__, 2617233908Sadrian tid); 2618233908Sadrian 2619233908Sadrian tap = ath_tx_get_tx_tid(tid->an, tid->tid); 2620233908Sadrian 2621233908Sadrian /* 2622233908Sadrian * This is an error condition! 2623233908Sadrian */ 2624233908Sadrian if (tid->bar_wait == 0 || tid->bar_tx == 1) { 2625233908Sadrian device_printf(sc->sc_dev, 2626233908Sadrian "%s: tid=%p, bar_tx=%d, bar_wait=%d: ?\n", 2627233908Sadrian __func__, 2628233908Sadrian tid, 2629233908Sadrian tid->bar_tx, 2630233908Sadrian tid->bar_wait); 2631233908Sadrian return; 2632233908Sadrian } 2633233908Sadrian 2634233908Sadrian /* Don't do anything if we still have pending frames */ 2635233908Sadrian if (tid->hwq_depth > 0) { 2636235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2637233908Sadrian "%s: tid=%p, hwq_depth=%d, waiting\n", 2638233908Sadrian __func__, 2639233908Sadrian tid, 2640233908Sadrian tid->hwq_depth); 2641233908Sadrian return; 2642233908Sadrian } 2643233908Sadrian 2644233908Sadrian /* We're now about to TX */ 2645233908Sadrian tid->bar_tx = 1; 2646233908Sadrian 2647233908Sadrian /* 2648233908Sadrian * Calculate new BAW left edge, now that all frames have either 2649233908Sadrian * succeeded or failed. 2650233908Sadrian * 2651233908Sadrian * XXX verify this is _actually_ the valid value to begin at! 2652233908Sadrian */ 2653235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2654233908Sadrian "%s: tid=%p, new BAW left edge=%d\n", 2655233908Sadrian __func__, 2656233908Sadrian tid, 2657233908Sadrian tap->txa_start); 2658233908Sadrian 2659233908Sadrian /* Try sending the BAR frame */ 2660233908Sadrian /* We can't hold the lock here! */ 2661233908Sadrian 2662233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2663233908Sadrian if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) { 2664233908Sadrian /* Success? Now we wait for notification that it's done */ 2665233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2666233908Sadrian return; 2667233908Sadrian } 2668233908Sadrian 2669233908Sadrian /* Failure? For now, warn loudly and continue */ 2670233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2671233908Sadrian device_printf(sc->sc_dev, "%s: tid=%p, failed to TX BAR, continue!\n", 2672233908Sadrian __func__, tid); 2673233908Sadrian ath_tx_tid_bar_unsuspend(sc, tid); 2674233908Sadrian} 2675233908Sadrian 2676233908Sadrian 2677233908Sadrian/* 2678227364Sadrian * Free any packets currently pending in the software TX queue. 2679227364Sadrian * 2680227364Sadrian * This will be called when a node is being deleted. 2681227364Sadrian * 2682227364Sadrian * It can also be called on an active node during an interface 2683227364Sadrian * reset or state transition. 2684227364Sadrian * 2685227364Sadrian * (From Linux/reference): 2686227364Sadrian * 2687227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2688227364Sadrian * sequence number(s) without setting the retry bit. The 2689227364Sadrian * alternative is to give up on these and BAR the receiver's window 2690227364Sadrian * forward. 2691227364Sadrian */ 2692227364Sadrianstatic void 2693229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 2694229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 2695227364Sadrian{ 2696227364Sadrian struct ath_buf *bf; 2697227364Sadrian struct ieee80211_tx_ampdu *tap; 2698227364Sadrian struct ieee80211_node *ni = &an->an_node; 2699227364Sadrian int t = 0; 2700227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2701227364Sadrian 2702227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2703227364Sadrian 2704227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2705227364Sadrian 2706227364Sadrian /* Walk the queue, free frames */ 2707227364Sadrian for (;;) { 2708227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2709227364Sadrian if (bf == NULL) { 2710227364Sadrian break; 2711227364Sadrian } 2712227364Sadrian 2713227364Sadrian if (t == 0) { 2714227364Sadrian device_printf(sc->sc_dev, 2715233330Sadrian "%s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 2716236872Sadrian "seqno=%d, retry=%d\n", 2717233330Sadrian __func__, ni, bf, 2718233330Sadrian bf->bf_state.bfs_addedbaw, 2719233330Sadrian bf->bf_state.bfs_dobaw, 2720233480Sadrian SEQNO(bf->bf_state.bfs_seqno), 2721233480Sadrian bf->bf_state.bfs_retries); 2722233330Sadrian device_printf(sc->sc_dev, 2723235491Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d\n", 2724233480Sadrian __func__, ni, bf, 2725233480Sadrian tid->axq_depth, 2726235491Sadrian tid->hwq_depth, 2727235491Sadrian tid->bar_wait); 2728233480Sadrian device_printf(sc->sc_dev, 2729236872Sadrian "%s: node %p: tid %d: txq_depth=%d, " 2730227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2731229949Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, " 2732229949Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 2733236872Sadrian __func__, ni, tid->tid, txq->axq_depth, 2734227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2735227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2736227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2737227364Sadrian ni->ni_txseqs[tid->tid]); 2738229165Sadrian 2739229165Sadrian /* XXX Dump the frame, see what it is? */ 2740229165Sadrian ieee80211_dump_pkt(ni->ni_ic, 2741229165Sadrian mtod(bf->bf_m, const uint8_t *), 2742229165Sadrian bf->bf_m->m_len, 0, -1); 2743229165Sadrian 2744233897Sadrian t = 1; 2745227364Sadrian } 2746227364Sadrian 2747227364Sadrian 2748227364Sadrian /* 2749227364Sadrian * If the current TID is running AMPDU, update 2750227364Sadrian * the BAW. 2751227364Sadrian */ 2752227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 2753227364Sadrian bf->bf_state.bfs_dobaw) { 2754227364Sadrian /* 2755227364Sadrian * Only remove the frame from the BAW if it's 2756227364Sadrian * been transmitted at least once; this means 2757227364Sadrian * the frame was in the BAW to begin with. 2758227364Sadrian */ 2759227364Sadrian if (bf->bf_state.bfs_retries > 0) { 2760227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 2761227364Sadrian bf->bf_state.bfs_dobaw = 0; 2762227364Sadrian } 2763227364Sadrian /* 2764227364Sadrian * This has become a non-fatal error now 2765227364Sadrian */ 2766227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2767227364Sadrian device_printf(sc->sc_dev, 2768227364Sadrian "%s: wasn't added: seqno %d\n", 2769227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2770227364Sadrian } 2771227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 2772227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 2773227364Sadrian } 2774227364Sadrian 2775227364Sadrian /* 2776227364Sadrian * Now that it's completed, grab the TID lock and update 2777227364Sadrian * the sequence number and BAW window. 2778227364Sadrian * Because sequence numbers have been assigned to frames 2779227364Sadrian * that haven't been sent yet, it's entirely possible 2780227364Sadrian * we'll be called with some pending frames that have not 2781227364Sadrian * been transmitted. 2782227364Sadrian * 2783227364Sadrian * The cleaner solution is to do the sequence number allocation 2784227364Sadrian * when the packet is first transmitted - and thus the "retries" 2785227364Sadrian * check above would be enough to update the BAW/seqno. 2786227364Sadrian */ 2787227364Sadrian 2788227364Sadrian /* But don't do it for non-QoS TIDs */ 2789227364Sadrian if (tap) { 2790227364Sadrian#if 0 2791227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2792227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 2793227364Sadrian __func__, an, tid->tid, tap->txa_start); 2794227364Sadrian#endif 2795227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 2796227364Sadrian tid->baw_tail = tid->baw_head; 2797227364Sadrian } 2798227364Sadrian} 2799227364Sadrian 2800227364Sadrian/* 2801227364Sadrian * Flush all software queued packets for the given node. 2802227364Sadrian * 2803227364Sadrian * This occurs when a completion handler frees the last buffer 2804227364Sadrian * for a node, and the node is thus freed. This causes the node 2805227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 2806227364Sadrian */ 2807227364Sadrianvoid 2808227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 2809227364Sadrian{ 2810227364Sadrian int tid; 2811227364Sadrian ath_bufhead bf_cq; 2812227364Sadrian struct ath_buf *bf; 2813227364Sadrian 2814227364Sadrian TAILQ_INIT(&bf_cq); 2815227364Sadrian 2816227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 2817227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2818227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 2819227364Sadrian 2820227364Sadrian /* Remove this tid from the list of active tids */ 2821227364Sadrian ATH_TXQ_LOCK(txq); 2822227364Sadrian ath_tx_tid_unsched(sc, atid); 2823227364Sadrian 2824227364Sadrian /* Free packets */ 2825227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 2826227364Sadrian ATH_TXQ_UNLOCK(txq); 2827227364Sadrian } 2828227364Sadrian 2829227364Sadrian /* Handle completed frames */ 2830227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2831227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2832227364Sadrian ath_tx_default_comp(sc, bf, 0); 2833227364Sadrian } 2834227364Sadrian} 2835227364Sadrian 2836227364Sadrian/* 2837227364Sadrian * Drain all the software TXQs currently with traffic queued. 2838227364Sadrian */ 2839227364Sadrianvoid 2840227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 2841227364Sadrian{ 2842227364Sadrian struct ath_tid *tid; 2843227364Sadrian ath_bufhead bf_cq; 2844227364Sadrian struct ath_buf *bf; 2845227364Sadrian 2846227364Sadrian TAILQ_INIT(&bf_cq); 2847227364Sadrian ATH_TXQ_LOCK(txq); 2848227364Sadrian 2849227364Sadrian /* 2850227364Sadrian * Iterate over all active tids for the given txq, 2851227364Sadrian * flushing and unsched'ing them 2852227364Sadrian */ 2853227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 2854227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 2855227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 2856227364Sadrian ath_tx_tid_unsched(sc, tid); 2857227364Sadrian } 2858227364Sadrian 2859227364Sadrian ATH_TXQ_UNLOCK(txq); 2860227364Sadrian 2861227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2862227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2863227364Sadrian ath_tx_default_comp(sc, bf, 0); 2864227364Sadrian } 2865227364Sadrian} 2866227364Sadrian 2867227364Sadrian/* 2868227364Sadrian * Handle completion of non-aggregate session frames. 2869227364Sadrian */ 2870227364Sadrianvoid 2871227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 2872227364Sadrian{ 2873227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2874227364Sadrian struct ath_node *an = ATH_NODE(ni); 2875227364Sadrian int tid = bf->bf_state.bfs_tid; 2876227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2877227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 2878227364Sadrian 2879227364Sadrian /* The TID state is protected behind the TXQ lock */ 2880227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2881227364Sadrian 2882227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 2883227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 2884227364Sadrian 2885227364Sadrian atid->hwq_depth--; 2886227364Sadrian if (atid->hwq_depth < 0) 2887227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 2888227364Sadrian __func__, atid->hwq_depth); 2889227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2890227364Sadrian 2891227364Sadrian /* 2892227364Sadrian * punt to rate control if we're not being cleaned up 2893227364Sadrian * during a hw queue drain and the frame wanted an ACK. 2894227364Sadrian */ 2895233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 2896227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 2897227364Sadrian ts, bf->bf_state.bfs_pktlen, 2898227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 2899227364Sadrian 2900227364Sadrian ath_tx_default_comp(sc, bf, fail); 2901227364Sadrian} 2902227364Sadrian 2903227364Sadrian/* 2904227364Sadrian * Handle cleanup of aggregate session packets that aren't 2905227364Sadrian * an A-MPDU. 2906227364Sadrian * 2907227364Sadrian * There's no need to update the BAW here - the session is being 2908227364Sadrian * torn down. 2909227364Sadrian */ 2910227364Sadrianstatic void 2911227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2912227364Sadrian{ 2913227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2914227364Sadrian struct ath_node *an = ATH_NODE(ni); 2915227364Sadrian int tid = bf->bf_state.bfs_tid; 2916227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2917227364Sadrian 2918227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 2919227364Sadrian __func__, tid, atid->incomp); 2920227364Sadrian 2921227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2922227364Sadrian atid->incomp--; 2923227364Sadrian if (atid->incomp == 0) { 2924227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2925227364Sadrian "%s: TID %d: cleaned up! resume!\n", 2926227364Sadrian __func__, tid); 2927227364Sadrian atid->cleanup_inprogress = 0; 2928227364Sadrian ath_tx_tid_resume(sc, atid); 2929227364Sadrian } 2930227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2931227364Sadrian 2932227364Sadrian ath_tx_default_comp(sc, bf, 0); 2933227364Sadrian} 2934227364Sadrian 2935227364Sadrian/* 2936227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 2937227364Sadrian * unaggregated. 2938227364Sadrian * 2939227364Sadrian * - Discard all retry frames from the s/w queue. 2940227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 2941227364Sadrian * - Count the number of unacked frames, and let transmit completion 2942227364Sadrian * handle it later. 2943227364Sadrian * 2944227364Sadrian * The caller is responsible for pausing the TID. 2945227364Sadrian */ 2946227364Sadrianstatic void 2947235749Sadrianath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 2948227364Sadrian{ 2949227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2950227364Sadrian struct ieee80211_tx_ampdu *tap; 2951227364Sadrian struct ath_buf *bf, *bf_next; 2952227364Sadrian ath_bufhead bf_cq; 2953227364Sadrian 2954235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2955227364Sadrian "%s: TID %d: called\n", __func__, tid); 2956227364Sadrian 2957227364Sadrian TAILQ_INIT(&bf_cq); 2958227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2959227364Sadrian 2960227364Sadrian /* 2961227364Sadrian * Update the frames in the software TX queue: 2962227364Sadrian * 2963227364Sadrian * + Discard retry frames in the queue 2964227364Sadrian * + Fix the completion function to be non-aggregate 2965227364Sadrian */ 2966227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2967227364Sadrian while (bf) { 2968227364Sadrian if (bf->bf_state.bfs_isretried) { 2969227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 2970227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 2971227364Sadrian atid->axq_depth--; 2972227364Sadrian if (bf->bf_state.bfs_dobaw) { 2973227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2974227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2975227364Sadrian device_printf(sc->sc_dev, 2976227364Sadrian "%s: wasn't added: seqno %d\n", 2977229949Sadrian __func__, 2978229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 2979227364Sadrian } 2980227364Sadrian bf->bf_state.bfs_dobaw = 0; 2981227364Sadrian /* 2982227364Sadrian * Call the default completion handler with "fail" just 2983227364Sadrian * so upper levels are suitably notified about this. 2984227364Sadrian */ 2985227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 2986227364Sadrian bf = bf_next; 2987227364Sadrian continue; 2988227364Sadrian } 2989227364Sadrian /* Give these the default completion handler */ 2990227364Sadrian bf->bf_comp = ath_tx_normal_comp; 2991227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 2992227364Sadrian } 2993227364Sadrian 2994227364Sadrian /* The caller is required to pause the TID */ 2995227364Sadrian#if 0 2996227364Sadrian /* Pause the TID */ 2997227364Sadrian ath_tx_tid_pause(sc, atid); 2998227364Sadrian#endif 2999227364Sadrian 3000227364Sadrian /* 3001227364Sadrian * Calculate what hardware-queued frames exist based 3002227364Sadrian * on the current BAW size. Ie, what frames have been 3003227364Sadrian * added to the TX hardware queue for this TID but 3004227364Sadrian * not yet ACKed. 3005227364Sadrian */ 3006227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3007227364Sadrian /* Need the lock - fiddling with BAW */ 3008227364Sadrian while (atid->baw_head != atid->baw_tail) { 3009227364Sadrian if (atid->tx_buf[atid->baw_head]) { 3010227364Sadrian atid->incomp++; 3011227364Sadrian atid->cleanup_inprogress = 1; 3012227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 3013227364Sadrian } 3014227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 3015227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 3016227364Sadrian } 3017227364Sadrian 3018227364Sadrian /* 3019227364Sadrian * If cleanup is required, defer TID scheduling 3020227364Sadrian * until all the HW queued packets have been 3021227364Sadrian * sent. 3022227364Sadrian */ 3023227364Sadrian if (! atid->cleanup_inprogress) 3024227364Sadrian ath_tx_tid_resume(sc, atid); 3025227364Sadrian 3026227364Sadrian if (atid->cleanup_inprogress) 3027227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3028227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 3029227364Sadrian __func__, tid, atid->incomp); 3030227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3031227364Sadrian 3032227364Sadrian /* Handle completing frames and fail them */ 3033227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3034227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3035227364Sadrian ath_tx_default_comp(sc, bf, 1); 3036227364Sadrian } 3037227364Sadrian} 3038227364Sadrian 3039227364Sadrianstatic void 3040227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 3041227364Sadrian{ 3042227364Sadrian struct ieee80211_frame *wh; 3043227364Sadrian 3044227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 3045227364Sadrian /* Only update/resync if needed */ 3046227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 3047227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 3048227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3049227364Sadrian BUS_DMASYNC_PREWRITE); 3050227364Sadrian } 3051227364Sadrian sc->sc_stats.ast_tx_swretries++; 3052227364Sadrian bf->bf_state.bfs_isretried = 1; 3053227364Sadrian bf->bf_state.bfs_retries ++; 3054227364Sadrian} 3055227364Sadrian 3056227364Sadrianstatic struct ath_buf * 3057227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3058227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3059227364Sadrian{ 3060227364Sadrian struct ath_buf *nbf; 3061227364Sadrian int error; 3062227364Sadrian 3063227364Sadrian nbf = ath_buf_clone(sc, bf); 3064227364Sadrian 3065227364Sadrian#if 0 3066227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3067227364Sadrian __func__); 3068227364Sadrian#endif 3069227364Sadrian 3070227364Sadrian if (nbf == NULL) { 3071227364Sadrian /* Failed to clone */ 3072227364Sadrian device_printf(sc->sc_dev, 3073227364Sadrian "%s: failed to clone a busy buffer\n", 3074227364Sadrian __func__); 3075227364Sadrian return NULL; 3076227364Sadrian } 3077227364Sadrian 3078227364Sadrian /* Setup the dma for the new buffer */ 3079227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3080227364Sadrian if (error != 0) { 3081227364Sadrian device_printf(sc->sc_dev, 3082227364Sadrian "%s: failed to setup dma for clone\n", 3083227364Sadrian __func__); 3084227364Sadrian /* 3085227364Sadrian * Put this at the head of the list, not tail; 3086227364Sadrian * that way it doesn't interfere with the 3087227364Sadrian * busy buffer logic (which uses the tail of 3088227364Sadrian * the list.) 3089227364Sadrian */ 3090227364Sadrian ATH_TXBUF_LOCK(sc); 3091227364Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, nbf, bf_list); 3092227364Sadrian ATH_TXBUF_UNLOCK(sc); 3093227364Sadrian return NULL; 3094227364Sadrian } 3095227364Sadrian 3096227398Sadrian /* Update BAW if required, before we free the original buf */ 3097227398Sadrian if (bf->bf_state.bfs_dobaw) 3098227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3099227398Sadrian 3100227364Sadrian /* Free current buffer; return the older buffer */ 3101227364Sadrian bf->bf_m = NULL; 3102227364Sadrian bf->bf_node = NULL; 3103227364Sadrian ath_freebuf(sc, bf); 3104227364Sadrian return nbf; 3105227364Sadrian} 3106227364Sadrian 3107227364Sadrian/* 3108227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3109227364Sadrian * session. 3110227364Sadrian * 3111227364Sadrian * If too many retries occur, pause the TID, wait for 3112227364Sadrian * any further retransmits (as there's no reason why 3113227364Sadrian * non-aggregate frames in an aggregate session are 3114227364Sadrian * transmitted in-order; they just have to be in-BAW) 3115227364Sadrian * and then queue a BAR. 3116227364Sadrian */ 3117227364Sadrianstatic void 3118227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3119227364Sadrian{ 3120227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3121227364Sadrian struct ath_node *an = ATH_NODE(ni); 3122227364Sadrian int tid = bf->bf_state.bfs_tid; 3123227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3124227364Sadrian struct ieee80211_tx_ampdu *tap; 3125227364Sadrian 3126227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3127227364Sadrian 3128227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3129227364Sadrian 3130227364Sadrian /* 3131227364Sadrian * If the buffer is marked as busy, we can't directly 3132227364Sadrian * reuse it. Instead, try to clone the buffer. 3133227364Sadrian * If the clone is successful, recycle the old buffer. 3134227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3135227364Sadrian * to force the next bit of code to free the buffer 3136227364Sadrian * for us. 3137227364Sadrian */ 3138227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3139227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3140227364Sadrian struct ath_buf *nbf; 3141227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3142227364Sadrian if (nbf) 3143227364Sadrian /* bf has been freed at this point */ 3144227364Sadrian bf = nbf; 3145227364Sadrian else 3146227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3147227364Sadrian } 3148227364Sadrian 3149227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3150227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3151227364Sadrian "%s: exceeded retries; seqno %d\n", 3152227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3153227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3154227364Sadrian 3155227364Sadrian /* Update BAW anyway */ 3156227364Sadrian if (bf->bf_state.bfs_dobaw) { 3157227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3158227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3159227364Sadrian device_printf(sc->sc_dev, 3160227364Sadrian "%s: wasn't added: seqno %d\n", 3161227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3162227364Sadrian } 3163227364Sadrian bf->bf_state.bfs_dobaw = 0; 3164227364Sadrian 3165233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3166233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3167227364Sadrian 3168233908Sadrian /* Send the BAR if there are no other frames waiting */ 3169233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3170233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3171227364Sadrian 3172233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3173227364Sadrian 3174227364Sadrian /* Free buffer, bf is free after this call */ 3175227364Sadrian ath_tx_default_comp(sc, bf, 0); 3176227364Sadrian return; 3177227364Sadrian } 3178227364Sadrian 3179227364Sadrian /* 3180227364Sadrian * This increments the retry counter as well as 3181227364Sadrian * sets the retry flag in the ath_buf and packet 3182227364Sadrian * body. 3183227364Sadrian */ 3184227364Sadrian ath_tx_set_retry(sc, bf); 3185227364Sadrian 3186227364Sadrian /* 3187227364Sadrian * Insert this at the head of the queue, so it's 3188227364Sadrian * retried before any current/subsequent frames. 3189227364Sadrian */ 3190227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3191227364Sadrian ath_tx_tid_sched(sc, atid); 3192233908Sadrian /* Send the BAR if there are no other frames waiting */ 3193233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3194233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3195227364Sadrian 3196227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3197227364Sadrian} 3198227364Sadrian 3199227364Sadrian/* 3200227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3201227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3202227364Sadrian * buffers. 3203227364Sadrian * 3204227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3205227364Sadrian */ 3206227364Sadrianstatic int 3207227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3208227364Sadrian ath_bufhead *bf_q) 3209227364Sadrian{ 3210227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3211227364Sadrian struct ath_node *an = ATH_NODE(ni); 3212227364Sadrian int tid = bf->bf_state.bfs_tid; 3213227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3214227364Sadrian 3215227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 3216227364Sadrian 3217227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3218227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 3219227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 3220227364Sadrian 3221227364Sadrian /* 3222227364Sadrian * If the buffer is marked as busy, we can't directly 3223227364Sadrian * reuse it. Instead, try to clone the buffer. 3224227364Sadrian * If the clone is successful, recycle the old buffer. 3225227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3226227364Sadrian * to force the next bit of code to free the buffer 3227227364Sadrian * for us. 3228227364Sadrian */ 3229227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3230227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3231227364Sadrian struct ath_buf *nbf; 3232227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3233227364Sadrian if (nbf) 3234227364Sadrian /* bf has been freed at this point */ 3235227364Sadrian bf = nbf; 3236227364Sadrian else 3237227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3238227364Sadrian } 3239227364Sadrian 3240227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3241227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3242227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3243227364Sadrian "%s: max retries: seqno %d\n", 3244227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3245227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3246227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3247227364Sadrian device_printf(sc->sc_dev, 3248227364Sadrian "%s: wasn't added: seqno %d\n", 3249227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3250227364Sadrian bf->bf_state.bfs_dobaw = 0; 3251227364Sadrian return 1; 3252227364Sadrian } 3253227364Sadrian 3254227364Sadrian ath_tx_set_retry(sc, bf); 3255227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 3256227364Sadrian 3257227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3258227364Sadrian return 0; 3259227364Sadrian} 3260227364Sadrian 3261227364Sadrian/* 3262227364Sadrian * error pkt completion for an aggregate destination 3263227364Sadrian */ 3264227364Sadrianstatic void 3265227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 3266227364Sadrian struct ath_tid *tid) 3267227364Sadrian{ 3268227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3269227364Sadrian struct ath_node *an = ATH_NODE(ni); 3270227364Sadrian struct ath_buf *bf_next, *bf; 3271227364Sadrian ath_bufhead bf_q; 3272227364Sadrian int drops = 0; 3273227364Sadrian struct ieee80211_tx_ampdu *tap; 3274227364Sadrian ath_bufhead bf_cq; 3275227364Sadrian 3276227364Sadrian TAILQ_INIT(&bf_q); 3277227364Sadrian TAILQ_INIT(&bf_cq); 3278227364Sadrian 3279227364Sadrian /* 3280227364Sadrian * Update rate control - all frames have failed. 3281227364Sadrian * 3282227364Sadrian * XXX use the length in the first frame in the series; 3283227364Sadrian * XXX just so things are consistent for now. 3284227364Sadrian */ 3285227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 3286227364Sadrian &bf_first->bf_status.ds_txstat, 3287227364Sadrian bf_first->bf_state.bfs_pktlen, 3288227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 3289227364Sadrian 3290227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3291227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3292227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 3293227364Sadrian 3294227364Sadrian /* Retry all subframes */ 3295227364Sadrian bf = bf_first; 3296227364Sadrian while (bf) { 3297227364Sadrian bf_next = bf->bf_next; 3298227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3299227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3300227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3301227364Sadrian drops++; 3302227364Sadrian bf->bf_next = NULL; 3303227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3304227364Sadrian } 3305227364Sadrian bf = bf_next; 3306227364Sadrian } 3307227364Sadrian 3308227364Sadrian /* Prepend all frames to the beginning of the queue */ 3309227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3310227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3311227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 3312227364Sadrian } 3313227364Sadrian 3314234725Sadrian /* 3315234725Sadrian * Schedule the TID to be re-tried. 3316234725Sadrian */ 3317227364Sadrian ath_tx_tid_sched(sc, tid); 3318227364Sadrian 3319227364Sadrian /* 3320227364Sadrian * send bar if we dropped any frames 3321227364Sadrian * 3322227364Sadrian * Keep the txq lock held for now, as we need to ensure 3323227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 3324227364Sadrian * in the ifnet TX context or raw TX context.) 3325227364Sadrian */ 3326227364Sadrian if (drops) { 3327233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3328233908Sadrian ath_tx_tid_bar_suspend(sc, tid); 3329227364Sadrian } 3330227364Sadrian 3331233908Sadrian /* 3332233908Sadrian * Send BAR if required 3333233908Sadrian */ 3334233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, tid)) 3335233908Sadrian ath_tx_tid_bar_tx(sc, tid); 3336233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3337233908Sadrian 3338227364Sadrian /* Complete frames which errored out */ 3339227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3340227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3341227364Sadrian ath_tx_default_comp(sc, bf, 0); 3342227364Sadrian } 3343227364Sadrian} 3344227364Sadrian 3345227364Sadrian/* 3346227364Sadrian * Handle clean-up of packets from an aggregate list. 3347227364Sadrian * 3348227364Sadrian * There's no need to update the BAW here - the session is being 3349227364Sadrian * torn down. 3350227364Sadrian */ 3351227364Sadrianstatic void 3352227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3353227364Sadrian{ 3354227364Sadrian struct ath_buf *bf, *bf_next; 3355227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3356227364Sadrian struct ath_node *an = ATH_NODE(ni); 3357227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3358227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3359227364Sadrian 3360227364Sadrian bf = bf_first; 3361227364Sadrian 3362227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3363227364Sadrian 3364227364Sadrian /* update incomp */ 3365227364Sadrian while (bf) { 3366227364Sadrian atid->incomp--; 3367227364Sadrian bf = bf->bf_next; 3368227364Sadrian } 3369227364Sadrian 3370227364Sadrian if (atid->incomp == 0) { 3371227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3372227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3373227364Sadrian __func__, tid); 3374227364Sadrian atid->cleanup_inprogress = 0; 3375227364Sadrian ath_tx_tid_resume(sc, atid); 3376227364Sadrian } 3377233908Sadrian 3378233908Sadrian /* Send BAR if required */ 3379233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3380233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3381227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3382227364Sadrian 3383227364Sadrian /* Handle frame completion */ 3384227364Sadrian while (bf) { 3385227364Sadrian bf_next = bf->bf_next; 3386227364Sadrian ath_tx_default_comp(sc, bf, 1); 3387227364Sadrian bf = bf_next; 3388227364Sadrian } 3389227364Sadrian} 3390227364Sadrian 3391227364Sadrian/* 3392227364Sadrian * Handle completion of an set of aggregate frames. 3393227364Sadrian * 3394227364Sadrian * XXX for now, simply complete each sub-frame. 3395227364Sadrian * 3396227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3397227364Sadrian * not the last descriptor in the first frame. 3398227364Sadrian */ 3399227364Sadrianstatic void 3400229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 3401229949Sadrian int fail) 3402227364Sadrian{ 3403227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3404227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3405227364Sadrian struct ath_node *an = ATH_NODE(ni); 3406227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3407227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3408227364Sadrian struct ath_tx_status ts; 3409227364Sadrian struct ieee80211_tx_ampdu *tap; 3410227364Sadrian ath_bufhead bf_q; 3411227364Sadrian ath_bufhead bf_cq; 3412227364Sadrian int seq_st, tx_ok; 3413227364Sadrian int hasba, isaggr; 3414227364Sadrian uint32_t ba[2]; 3415227364Sadrian struct ath_buf *bf, *bf_next; 3416227364Sadrian int ba_index; 3417227364Sadrian int drops = 0; 3418227364Sadrian int nframes = 0, nbad = 0, nf; 3419227364Sadrian int pktlen; 3420227364Sadrian /* XXX there's too much on the stack? */ 3421236038Sadrian struct ath_rc_series rc[ATH_RC_NUM]; 3422227364Sadrian int txseq; 3423227364Sadrian 3424227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3425227364Sadrian __func__, atid->hwq_depth); 3426227364Sadrian 3427227364Sadrian /* The TID state is kept behind the TXQ lock */ 3428227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3429227364Sadrian 3430227364Sadrian atid->hwq_depth--; 3431227364Sadrian if (atid->hwq_depth < 0) 3432227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3433227364Sadrian __func__, atid->hwq_depth); 3434227364Sadrian 3435227364Sadrian /* 3436227364Sadrian * Punt cleanup to the relevant function, not our problem now 3437227364Sadrian */ 3438227364Sadrian if (atid->cleanup_inprogress) { 3439227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3440227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3441227364Sadrian return; 3442227364Sadrian } 3443227364Sadrian 3444227364Sadrian /* 3445227364Sadrian * Take a copy; this may be needed -after- bf_first 3446227364Sadrian * has been completed and freed. 3447227364Sadrian */ 3448227364Sadrian ts = bf_first->bf_status.ds_txstat; 3449227364Sadrian /* 3450227364Sadrian * XXX for now, use the first frame in the aggregate for 3451227364Sadrian * XXX rate control completion; it's at least consistent. 3452227364Sadrian */ 3453227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3454227364Sadrian 3455227364Sadrian /* 3456235461Sadrian * Handle errors first! 3457235461Sadrian * 3458235461Sadrian * Here, handle _any_ error as a "exceeded retries" error. 3459235461Sadrian * Later on (when filtered frames are to be specially handled) 3460235461Sadrian * it'll have to be expanded. 3461227364Sadrian */ 3462235461Sadrian#if 0 3463227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3464235461Sadrian#endif 3465235461Sadrian if (ts.ts_status != 0) { 3466227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3467227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3468227364Sadrian return; 3469227364Sadrian } 3470227364Sadrian 3471227364Sadrian TAILQ_INIT(&bf_q); 3472227364Sadrian TAILQ_INIT(&bf_cq); 3473227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3474227364Sadrian 3475227364Sadrian /* 3476227364Sadrian * extract starting sequence and block-ack bitmap 3477227364Sadrian */ 3478227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3479227364Sadrian seq_st = ts.ts_seqnum; 3480227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3481227364Sadrian tx_ok = (ts.ts_status == 0); 3482227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3483227364Sadrian ba[0] = ts.ts_ba_low; 3484227364Sadrian ba[1] = ts.ts_ba_high; 3485227364Sadrian 3486227364Sadrian /* 3487227364Sadrian * Copy the TX completion status and the rate control 3488227364Sadrian * series from the first descriptor, as it may be freed 3489227364Sadrian * before the rate control code can get its grubby fingers 3490227364Sadrian * into things. 3491227364Sadrian */ 3492227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3493227364Sadrian 3494227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3495229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 3496229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3497227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3498227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3499227364Sadrian 3500227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3501227364Sadrian if (tid != ts.ts_tid) { 3502227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3503227364Sadrian __func__, tid, ts.ts_tid); 3504227364Sadrian tx_ok = 0; 3505227364Sadrian } 3506227364Sadrian 3507227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3508227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3509227364Sadrian device_printf(sc->sc_dev, 3510229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 3511229949Sadrian "seq_st=%d\n", 3512227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3513227364Sadrian /* XXX TODO: schedule an interface reset */ 3514227364Sadrian } 3515227364Sadrian 3516227364Sadrian /* 3517227364Sadrian * Walk the list of frames, figure out which ones were correctly 3518227364Sadrian * sent and which weren't. 3519227364Sadrian */ 3520227364Sadrian bf = bf_first; 3521227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3522227364Sadrian 3523227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3524227364Sadrian bf_first = NULL; 3525227364Sadrian 3526227364Sadrian /* 3527227364Sadrian * Walk the list of completed frames and determine 3528227364Sadrian * which need to be completed and which need to be 3529227364Sadrian * retransmitted. 3530227364Sadrian * 3531227364Sadrian * For completed frames, the completion functions need 3532227364Sadrian * to be called at the end of this function as the last 3533227364Sadrian * node reference may free the node. 3534227364Sadrian * 3535227364Sadrian * Finally, since the TXQ lock can't be held during the 3536227364Sadrian * completion callback (to avoid lock recursion), 3537227364Sadrian * the completion calls have to be done outside of the 3538227364Sadrian * lock. 3539227364Sadrian */ 3540227364Sadrian while (bf) { 3541227364Sadrian nframes++; 3542229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 3543229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3544227364Sadrian bf_next = bf->bf_next; 3545227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3546227364Sadrian 3547227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3548227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3549227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3550227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3551227364Sadrian 3552227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3553227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 3554227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3555227364Sadrian bf->bf_state.bfs_dobaw = 0; 3556227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3557227364Sadrian device_printf(sc->sc_dev, 3558227364Sadrian "%s: wasn't added: seqno %d\n", 3559227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3560227364Sadrian bf->bf_next = NULL; 3561227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3562227364Sadrian } else { 3563227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3564227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3565227364Sadrian drops++; 3566227364Sadrian bf->bf_next = NULL; 3567227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3568227364Sadrian } 3569227364Sadrian nbad++; 3570227364Sadrian } 3571227364Sadrian bf = bf_next; 3572227364Sadrian } 3573227364Sadrian 3574227364Sadrian /* 3575227364Sadrian * Now that the BAW updates have been done, unlock 3576227364Sadrian * 3577227364Sadrian * txseq is grabbed before the lock is released so we 3578227364Sadrian * have a consistent view of what -was- in the BAW. 3579227364Sadrian * Anything after this point will not yet have been 3580227364Sadrian * TXed. 3581227364Sadrian */ 3582227364Sadrian txseq = tap->txa_start; 3583227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3584227364Sadrian 3585227364Sadrian if (nframes != nf) 3586227364Sadrian device_printf(sc->sc_dev, 3587227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3588227364Sadrian __func__, nframes, nf); 3589227364Sadrian 3590227364Sadrian /* 3591227364Sadrian * Now we know how many frames were bad, call the rate 3592227364Sadrian * control code. 3593227364Sadrian */ 3594227364Sadrian if (fail == 0) 3595229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 3596229949Sadrian nbad); 3597227364Sadrian 3598227364Sadrian /* 3599227364Sadrian * send bar if we dropped any frames 3600227364Sadrian */ 3601227364Sadrian if (drops) { 3602233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3603233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3604233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3605233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3606227364Sadrian } 3607227364Sadrian 3608234725Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3609234725Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3610234725Sadrian 3611234725Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3612234725Sadrian 3613227364Sadrian /* Prepend all frames to the beginning of the queue */ 3614227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3615227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3616227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3617227364Sadrian } 3618234725Sadrian 3619234725Sadrian /* 3620234725Sadrian * Reschedule to grab some further frames. 3621234725Sadrian */ 3622227364Sadrian ath_tx_tid_sched(sc, atid); 3623227364Sadrian 3624233908Sadrian /* 3625233908Sadrian * Send BAR if required 3626233908Sadrian */ 3627233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3628233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3629234725Sadrian 3630233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3631233908Sadrian 3632227364Sadrian /* Do deferred completion */ 3633227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3634227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3635227364Sadrian ath_tx_default_comp(sc, bf, 0); 3636227364Sadrian } 3637227364Sadrian} 3638227364Sadrian 3639227364Sadrian/* 3640227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3641227364Sadrian * session. 3642227364Sadrian * 3643227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3644227364Sadrian * ath_tx_draintxq(). 3645227364Sadrian */ 3646227364Sadrianstatic void 3647227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3648227364Sadrian{ 3649227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3650227364Sadrian struct ath_node *an = ATH_NODE(ni); 3651227364Sadrian int tid = bf->bf_state.bfs_tid; 3652227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3653227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3654227364Sadrian 3655227364Sadrian /* 3656227364Sadrian * Update rate control status here, before we possibly 3657227364Sadrian * punt to retry or cleanup. 3658227364Sadrian * 3659227364Sadrian * Do it outside of the TXQ lock. 3660227364Sadrian */ 3661233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3662227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3663227364Sadrian &bf->bf_status.ds_txstat, 3664227364Sadrian bf->bf_state.bfs_pktlen, 3665227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3666227364Sadrian 3667227364Sadrian /* 3668227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3669227364Sadrian * This unfortunately means that it's released and regrabbed 3670227364Sadrian * during retry and cleanup. That's rather inefficient. 3671227364Sadrian */ 3672227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3673227364Sadrian 3674227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3675227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3676227364Sadrian 3677229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 3678229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 3679229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 3680229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3681227364Sadrian 3682227364Sadrian atid->hwq_depth--; 3683227364Sadrian if (atid->hwq_depth < 0) 3684227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3685227364Sadrian __func__, atid->hwq_depth); 3686227364Sadrian 3687227364Sadrian /* 3688227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3689227364Sadrian * rather than handling it here. It's thus their 3690227364Sadrian * responsibility to clean up, call the completion 3691227364Sadrian * function in net80211, etc. 3692227364Sadrian */ 3693227364Sadrian if (atid->cleanup_inprogress) { 3694227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3695229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 3696229949Sadrian __func__); 3697227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3698227364Sadrian return; 3699227364Sadrian } 3700227364Sadrian 3701227364Sadrian /* 3702227364Sadrian * Don't bother with the retry check if all frames 3703227364Sadrian * are being failed (eg during queue deletion.) 3704227364Sadrian */ 3705235461Sadrian#if 0 3706227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3707235461Sadrian#endif 3708235461Sadrian if (fail == 0 && ts->ts_status != 0) { 3709227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3710229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 3711229949Sadrian __func__); 3712227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3713227364Sadrian return; 3714227364Sadrian } 3715227364Sadrian 3716227364Sadrian /* Success? Complete */ 3717227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3718227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3719227364Sadrian if (bf->bf_state.bfs_dobaw) { 3720227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3721227364Sadrian bf->bf_state.bfs_dobaw = 0; 3722227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3723227364Sadrian device_printf(sc->sc_dev, 3724227364Sadrian "%s: wasn't added: seqno %d\n", 3725227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3726227364Sadrian } 3727227364Sadrian 3728233908Sadrian /* 3729233908Sadrian * Send BAR if required 3730233908Sadrian */ 3731233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3732233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3733233908Sadrian 3734227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3735227364Sadrian 3736227364Sadrian ath_tx_default_comp(sc, bf, fail); 3737227364Sadrian /* bf is freed at this point */ 3738227364Sadrian} 3739227364Sadrian 3740227364Sadrianvoid 3741227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3742227364Sadrian{ 3743227364Sadrian if (bf->bf_state.bfs_aggr) 3744227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 3745227364Sadrian else 3746227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 3747227364Sadrian} 3748227364Sadrian 3749227364Sadrian/* 3750227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3751227364Sadrian * 3752227364Sadrian * This is the aggregate version. 3753227364Sadrian */ 3754227364Sadrianvoid 3755227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 3756227364Sadrian struct ath_tid *tid) 3757227364Sadrian{ 3758227364Sadrian struct ath_buf *bf; 3759227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3760227364Sadrian struct ieee80211_tx_ampdu *tap; 3761227364Sadrian struct ieee80211_node *ni = &an->an_node; 3762227364Sadrian ATH_AGGR_STATUS status; 3763227364Sadrian ath_bufhead bf_q; 3764227364Sadrian 3765227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 3766227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3767227364Sadrian 3768227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3769227364Sadrian 3770227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 3771227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 3772227364Sadrian __func__); 3773227364Sadrian 3774227364Sadrian for (;;) { 3775227364Sadrian status = ATH_AGGR_DONE; 3776227364Sadrian 3777227364Sadrian /* 3778227364Sadrian * If the upper layer has paused the TID, don't 3779227364Sadrian * queue any further packets. 3780227364Sadrian * 3781227364Sadrian * This can also occur from the completion task because 3782227364Sadrian * of packet loss; but as its serialised with this code, 3783227364Sadrian * it won't "appear" half way through queuing packets. 3784227364Sadrian */ 3785227364Sadrian if (tid->paused) 3786227364Sadrian break; 3787227364Sadrian 3788227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3789227364Sadrian if (bf == NULL) { 3790227364Sadrian break; 3791227364Sadrian } 3792227364Sadrian 3793227364Sadrian /* 3794227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 3795227364Sadrian * data frame), schedule it directly; continue. 3796227364Sadrian */ 3797227364Sadrian if (! bf->bf_state.bfs_dobaw) { 3798229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3799229949Sadrian "%s: non-baw packet\n", 3800227364Sadrian __func__); 3801227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3802227364Sadrian bf->bf_state.bfs_aggr = 0; 3803227364Sadrian ath_tx_do_ratelookup(sc, bf); 3804233989Sadrian ath_tx_calc_duration(sc, bf); 3805233989Sadrian ath_tx_calc_protection(sc, bf); 3806233989Sadrian ath_tx_set_rtscts(sc, bf); 3807227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3808227364Sadrian ath_tx_setds(sc, bf); 3809227364Sadrian ath_tx_chaindesclist(sc, bf); 3810227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3811227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3812227364Sadrian 3813227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 3814227364Sadrian 3815227364Sadrian /* Queue the packet; continue */ 3816227364Sadrian goto queuepkt; 3817227364Sadrian } 3818227364Sadrian 3819227364Sadrian TAILQ_INIT(&bf_q); 3820227364Sadrian 3821227364Sadrian /* 3822227364Sadrian * Do a rate control lookup on the first frame in the 3823227364Sadrian * list. The rate control code needs that to occur 3824227364Sadrian * before it can determine whether to TX. 3825227364Sadrian * It's inaccurate because the rate control code doesn't 3826227364Sadrian * really "do" aggregate lookups, so it only considers 3827227364Sadrian * the size of the first frame. 3828227364Sadrian */ 3829227364Sadrian ath_tx_do_ratelookup(sc, bf); 3830227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 3831227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 3832233989Sadrian 3833233989Sadrian ath_tx_calc_duration(sc, bf); 3834233989Sadrian ath_tx_calc_protection(sc, bf); 3835233989Sadrian 3836233989Sadrian ath_tx_set_rtscts(sc, bf); 3837227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3838227364Sadrian 3839227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 3840227364Sadrian 3841227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3842227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 3843227364Sadrian 3844227364Sadrian /* 3845227364Sadrian * No frames to be picked up - out of BAW 3846227364Sadrian */ 3847227364Sadrian if (TAILQ_EMPTY(&bf_q)) 3848227364Sadrian break; 3849227364Sadrian 3850227364Sadrian /* 3851227364Sadrian * This assumes that the descriptor list in the ath_bufhead 3852227364Sadrian * are already linked together via bf_next pointers. 3853227364Sadrian */ 3854227364Sadrian bf = TAILQ_FIRST(&bf_q); 3855227364Sadrian 3856233989Sadrian if (status == ATH_AGGR_8K_LIMITED) 3857233989Sadrian sc->sc_aggr_stats.aggr_rts_aggr_limited++; 3858233989Sadrian 3859227364Sadrian /* 3860227364Sadrian * If it's the only frame send as non-aggregate 3861227364Sadrian * assume that ath_tx_form_aggr() has checked 3862227364Sadrian * whether it's in the BAW and added it appropriately. 3863227364Sadrian */ 3864227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 3865227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3866227364Sadrian "%s: single-frame aggregate\n", __func__); 3867227364Sadrian bf->bf_state.bfs_aggr = 0; 3868227364Sadrian ath_tx_setds(sc, bf); 3869227364Sadrian ath_tx_chaindesclist(sc, bf); 3870227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3871227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3872227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 3873227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 3874227364Sadrian else 3875227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 3876227364Sadrian } else { 3877227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3878229949Sadrian "%s: multi-frame aggregate: %d frames, " 3879229949Sadrian "length %d\n", 3880227364Sadrian __func__, bf->bf_state.bfs_nframes, 3881227364Sadrian bf->bf_state.bfs_al); 3882227364Sadrian bf->bf_state.bfs_aggr = 1; 3883227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 3884227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 3885227364Sadrian 3886227364Sadrian /* 3887233989Sadrian * Calculate the duration/protection as required. 3888233989Sadrian */ 3889233989Sadrian ath_tx_calc_duration(sc, bf); 3890233989Sadrian ath_tx_calc_protection(sc, bf); 3891233989Sadrian 3892233989Sadrian /* 3893227364Sadrian * Update the rate and rtscts information based on the 3894227364Sadrian * rate decision made by the rate control code; 3895227364Sadrian * the first frame in the aggregate needs it. 3896227364Sadrian */ 3897227364Sadrian ath_tx_set_rtscts(sc, bf); 3898227364Sadrian 3899227364Sadrian /* 3900227364Sadrian * Setup the relevant descriptor fields 3901227364Sadrian * for aggregation. The first descriptor 3902227364Sadrian * already points to the rest in the chain. 3903227364Sadrian */ 3904227364Sadrian ath_tx_setds_11n(sc, bf); 3905227364Sadrian 3906227364Sadrian /* 3907227364Sadrian * setup first desc with rate and aggr info 3908227364Sadrian */ 3909227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3910227364Sadrian } 3911227364Sadrian queuepkt: 3912227364Sadrian //txq = bf->bf_state.bfs_txq; 3913227364Sadrian 3914227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 3915227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 3916227364Sadrian 3917227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 3918227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 3919227364Sadrian 3920227364Sadrian /* Punt to txq */ 3921227364Sadrian ath_tx_handoff(sc, txq, bf); 3922227364Sadrian 3923227364Sadrian /* Track outstanding buffer count to hardware */ 3924227364Sadrian /* aggregates are "one" buffer */ 3925227364Sadrian tid->hwq_depth++; 3926227364Sadrian 3927227364Sadrian /* 3928227364Sadrian * Break out if ath_tx_form_aggr() indicated 3929227364Sadrian * there can't be any further progress (eg BAW is full.) 3930227364Sadrian * Checking for an empty txq is done above. 3931227364Sadrian * 3932227364Sadrian * XXX locking on txq here? 3933227364Sadrian */ 3934227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 3935227364Sadrian status == ATH_AGGR_BAW_CLOSED) 3936227364Sadrian break; 3937227364Sadrian } 3938227364Sadrian} 3939227364Sadrian 3940227364Sadrian/* 3941227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3942227364Sadrian */ 3943227364Sadrianvoid 3944227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 3945227364Sadrian struct ath_tid *tid) 3946227364Sadrian{ 3947227364Sadrian struct ath_buf *bf; 3948227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3949227364Sadrian struct ieee80211_node *ni = &an->an_node; 3950227364Sadrian 3951227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 3952227364Sadrian __func__, an, tid->tid); 3953227364Sadrian 3954227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3955227364Sadrian 3956227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 3957227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 3958227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 3959227364Sadrian __func__, tid->tid); 3960227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 3961227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 3962227364Sadrian __func__, tid->tid); 3963227364Sadrian 3964227364Sadrian for (;;) { 3965227364Sadrian 3966227364Sadrian /* 3967227364Sadrian * If the upper layers have paused the TID, don't 3968227364Sadrian * queue any further packets. 3969227364Sadrian */ 3970227364Sadrian if (tid->paused) 3971227364Sadrian break; 3972227364Sadrian 3973227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3974227364Sadrian if (bf == NULL) { 3975227364Sadrian break; 3976227364Sadrian } 3977227364Sadrian 3978227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3979227364Sadrian 3980227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 3981227364Sadrian 3982227364Sadrian /* Sanity check! */ 3983227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 3984227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 3985227364Sadrian " tid %d\n", 3986227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 3987227364Sadrian } 3988227364Sadrian /* Normal completion handler */ 3989227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3990227364Sadrian 3991227364Sadrian /* Program descriptors + rate control */ 3992227364Sadrian ath_tx_do_ratelookup(sc, bf); 3993233989Sadrian ath_tx_calc_duration(sc, bf); 3994233989Sadrian ath_tx_calc_protection(sc, bf); 3995233989Sadrian ath_tx_set_rtscts(sc, bf); 3996227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3997227364Sadrian ath_tx_setds(sc, bf); 3998227364Sadrian ath_tx_chaindesclist(sc, bf); 3999227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 4000227364Sadrian 4001227364Sadrian /* Track outstanding buffer count to hardware */ 4002227364Sadrian /* aggregates are "one" buffer */ 4003227364Sadrian tid->hwq_depth++; 4004227364Sadrian 4005227364Sadrian /* Punt to hardware or software txq */ 4006227364Sadrian ath_tx_handoff(sc, txq, bf); 4007227364Sadrian } 4008227364Sadrian} 4009227364Sadrian 4010227364Sadrian/* 4011227364Sadrian * Schedule some packets to the given hardware queue. 4012227364Sadrian * 4013227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 4014227364Sadrian * with queued traffic) and attempts to schedule traffic 4015227364Sadrian * from them. 4016227364Sadrian * 4017227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 4018227364Sadrian * added to the end of the queue after some frames have been 4019227364Sadrian * scheduled. 4020227364Sadrian */ 4021227364Sadrianvoid 4022227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 4023227364Sadrian{ 4024227364Sadrian struct ath_tid *tid, *next, *last; 4025227364Sadrian 4026227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4027227364Sadrian 4028227364Sadrian /* 4029227364Sadrian * Don't schedule if the hardware queue is busy. 4030227364Sadrian * This (hopefully) gives some more time to aggregate 4031227364Sadrian * some packets in the aggregation queue. 4032227364Sadrian */ 4033227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4034227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 4035227364Sadrian return; 4036227364Sadrian } 4037227364Sadrian 4038227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 4039227364Sadrian 4040227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 4041227364Sadrian /* 4042227364Sadrian * Suspend paused queues here; they'll be resumed 4043227364Sadrian * once the addba completes or times out. 4044227364Sadrian */ 4045227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 4046227364Sadrian __func__, tid->tid, tid->paused); 4047227364Sadrian ath_tx_tid_unsched(sc, tid); 4048227364Sadrian if (tid->paused) { 4049227364Sadrian continue; 4050227364Sadrian } 4051227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 4052227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 4053227364Sadrian else 4054227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 4055227364Sadrian 4056227364Sadrian /* Not empty? Re-schedule */ 4057227364Sadrian if (tid->axq_depth != 0) 4058227364Sadrian ath_tx_tid_sched(sc, tid); 4059227364Sadrian 4060227364Sadrian /* Give the software queue time to aggregate more packets */ 4061227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4062227364Sadrian break; 4063227364Sadrian } 4064227364Sadrian 4065227364Sadrian /* 4066227364Sadrian * If this was the last entry on the original list, stop. 4067227364Sadrian * Otherwise nodes that have been rescheduled onto the end 4068227364Sadrian * of the TID FIFO list will just keep being rescheduled. 4069227364Sadrian */ 4070227364Sadrian if (tid == last) 4071227364Sadrian break; 4072227364Sadrian } 4073227364Sadrian} 4074227364Sadrian 4075227364Sadrian/* 4076227364Sadrian * TX addba handling 4077227364Sadrian */ 4078227364Sadrian 4079227364Sadrian/* 4080227364Sadrian * Return net80211 TID struct pointer, or NULL for none 4081227364Sadrian */ 4082227364Sadrianstruct ieee80211_tx_ampdu * 4083227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 4084227364Sadrian{ 4085227364Sadrian struct ieee80211_node *ni = &an->an_node; 4086227364Sadrian struct ieee80211_tx_ampdu *tap; 4087227364Sadrian 4088227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4089227364Sadrian return NULL; 4090227364Sadrian 4091234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 4092227364Sadrian return tap; 4093227364Sadrian} 4094227364Sadrian 4095227364Sadrian/* 4096227364Sadrian * Is AMPDU-TX running? 4097227364Sadrian */ 4098227364Sadrianstatic int 4099227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 4100227364Sadrian{ 4101227364Sadrian struct ieee80211_tx_ampdu *tap; 4102227364Sadrian 4103227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4104227364Sadrian return 0; 4105227364Sadrian 4106227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4107227364Sadrian if (tap == NULL) 4108227364Sadrian return 0; /* Not valid; default to not running */ 4109227364Sadrian 4110227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 4111227364Sadrian} 4112227364Sadrian 4113227364Sadrian/* 4114227364Sadrian * Is AMPDU-TX negotiation pending? 4115227364Sadrian */ 4116227364Sadrianstatic int 4117227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 4118227364Sadrian{ 4119227364Sadrian struct ieee80211_tx_ampdu *tap; 4120227364Sadrian 4121227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4122227364Sadrian return 0; 4123227364Sadrian 4124227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4125227364Sadrian if (tap == NULL) 4126227364Sadrian return 0; /* Not valid; default to not pending */ 4127227364Sadrian 4128227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 4129227364Sadrian} 4130227364Sadrian 4131227364Sadrian/* 4132227364Sadrian * Is AMPDU-TX pending for the given TID? 4133227364Sadrian */ 4134227364Sadrian 4135227364Sadrian 4136227364Sadrian/* 4137227364Sadrian * Method to handle sending an ADDBA request. 4138227364Sadrian * 4139227364Sadrian * We tap this so the relevant flags can be set to pause the TID 4140227364Sadrian * whilst waiting for the response. 4141227364Sadrian * 4142227364Sadrian * XXX there's no timeout handler we can override? 4143227364Sadrian */ 4144227364Sadrianint 4145227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4146227364Sadrian int dialogtoken, int baparamset, int batimeout) 4147227364Sadrian{ 4148227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4149234324Sadrian int tid = tap->txa_tid; 4150227364Sadrian struct ath_node *an = ATH_NODE(ni); 4151227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4152227364Sadrian 4153227364Sadrian /* 4154227364Sadrian * XXX danger Will Robinson! 4155227364Sadrian * 4156227364Sadrian * Although the taskqueue may be running and scheduling some more 4157227364Sadrian * packets, these should all be _before_ the addba sequence number. 4158227364Sadrian * However, net80211 will keep self-assigning sequence numbers 4159227364Sadrian * until addba has been negotiated. 4160227364Sadrian * 4161227364Sadrian * In the past, these packets would be "paused" (which still works 4162227364Sadrian * fine, as they're being scheduled to the driver in the same 4163227364Sadrian * serialised method which is calling the addba request routine) 4164227364Sadrian * and when the aggregation session begins, they'll be dequeued 4165227364Sadrian * as aggregate packets and added to the BAW. However, now there's 4166227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 4167227364Sadrian * packets. Thus they never get included in the BAW tracking and 4168227364Sadrian * this can cause the initial burst of packets after the addba 4169227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 4170227364Sadrian * 4171227364Sadrian * The "eventual" solution should be to tag these packets with 4172227364Sadrian * dobaw. Although net80211 has given us a sequence number, 4173227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 4174227364Sadrian * fall within it. 4175227364Sadrian */ 4176235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4177235774Sadrian /* 4178235774Sadrian * This is a bit annoying. Until net80211 HT code inherits some 4179235774Sadrian * (any) locking, we may have this called in parallel BUT only 4180235774Sadrian * one response/timeout will be called. Grr. 4181235774Sadrian */ 4182235774Sadrian if (atid->addba_tx_pending == 0) { 4183235774Sadrian ath_tx_tid_pause(sc, atid); 4184235774Sadrian atid->addba_tx_pending = 1; 4185235774Sadrian } 4186235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4187227364Sadrian 4188227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4189227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 4190227364Sadrian __func__, dialogtoken, baparamset, batimeout); 4191227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4192227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4193227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4194227364Sadrian 4195227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 4196227364Sadrian batimeout); 4197227364Sadrian} 4198227364Sadrian 4199227364Sadrian/* 4200227364Sadrian * Handle an ADDBA response. 4201227364Sadrian * 4202227364Sadrian * We unpause the queue so TX'ing can resume. 4203227364Sadrian * 4204227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 4205227364Sadrian * aggregate or not) so the BAW is updated. 4206227364Sadrian * 4207227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 4208227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 4209227364Sadrian * edge won't match the ni->ni_txseq. 4210227364Sadrian * 4211227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 4212227364Sadrian * ni->ni_txseq. 4213227364Sadrian * 4214227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 4215227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 4216227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 4217227364Sadrian * window. 4218227364Sadrian */ 4219227364Sadrianint 4220227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4221227364Sadrian int status, int code, int batimeout) 4222227364Sadrian{ 4223227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4224234324Sadrian int tid = tap->txa_tid; 4225227364Sadrian struct ath_node *an = ATH_NODE(ni); 4226227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4227227364Sadrian int r; 4228227364Sadrian 4229227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4230227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 4231227364Sadrian status, code, batimeout); 4232227364Sadrian 4233227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4234227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4235227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4236227364Sadrian 4237227364Sadrian /* 4238227364Sadrian * Call this first, so the interface flags get updated 4239227364Sadrian * before the TID is unpaused. Otherwise a race condition 4240227364Sadrian * exists where the unpaused TID still doesn't yet have 4241227364Sadrian * IEEE80211_AGGR_RUNNING set. 4242227364Sadrian */ 4243227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 4244227364Sadrian 4245227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4246235774Sadrian atid->addba_tx_pending = 0; 4247227364Sadrian /* 4248227364Sadrian * XXX dirty! 4249227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 4250227364Sadrian * Read above for more information. 4251227364Sadrian */ 4252227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 4253227364Sadrian ath_tx_tid_resume(sc, atid); 4254227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4255227364Sadrian return r; 4256227364Sadrian} 4257227364Sadrian 4258227364Sadrian 4259227364Sadrian/* 4260227364Sadrian * Stop ADDBA on a queue. 4261227364Sadrian */ 4262227364Sadrianvoid 4263227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 4264227364Sadrian{ 4265227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4266234324Sadrian int tid = tap->txa_tid; 4267227364Sadrian struct ath_node *an = ATH_NODE(ni); 4268227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4269227364Sadrian 4270227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 4271227364Sadrian 4272227364Sadrian /* Pause TID traffic early, so there aren't any races */ 4273235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4274227364Sadrian ath_tx_tid_pause(sc, atid); 4275235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4276227364Sadrian 4277227364Sadrian /* There's no need to hold the TXQ lock here */ 4278227364Sadrian sc->sc_addba_stop(ni, tap); 4279227364Sadrian 4280227364Sadrian /* 4281235749Sadrian * ath_tx_tid_cleanup will resume the TID if possible, otherwise 4282227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 4283227364Sadrian * things have been cleaned up. 4284227364Sadrian */ 4285235749Sadrian ath_tx_tid_cleanup(sc, an, tid); 4286227364Sadrian} 4287227364Sadrian 4288227364Sadrian/* 4289227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 4290227364Sadrian * it simply tears down the aggregation session. Ew. 4291227364Sadrian * 4292227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 4293227364Sadrian * ic->ic_addba_stop(). 4294227364Sadrian * 4295227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 4296227364Sadrian * XXX BAR TX success or failure should be better handled! 4297227364Sadrian */ 4298227364Sadrianvoid 4299227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4300227364Sadrian int status) 4301227364Sadrian{ 4302227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4303234324Sadrian int tid = tap->txa_tid; 4304227364Sadrian struct ath_node *an = ATH_NODE(ni); 4305227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4306227364Sadrian int attempts = tap->txa_attempts; 4307227364Sadrian 4308235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 4309235676Sadrian "%s: called; tap=%p, atid=%p, txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n", 4310235491Sadrian __func__, 4311235676Sadrian tap, 4312235676Sadrian atid, 4313235676Sadrian tap->txa_tid, 4314235676Sadrian atid->tid, 4315235491Sadrian status, 4316235491Sadrian attempts); 4317227364Sadrian 4318227364Sadrian /* Note: This may update the BAW details */ 4319227364Sadrian sc->sc_bar_response(ni, tap, status); 4320227364Sadrian 4321227364Sadrian /* Unpause the TID */ 4322227364Sadrian /* 4323227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 4324227364Sadrian * XXX to a non-aggregate session. So we must unpause the 4325227364Sadrian * XXX TID here or it'll never be done. 4326227364Sadrian */ 4327227364Sadrian if (status == 0 || attempts == 50) { 4328227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4329233908Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4330227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4331227364Sadrian } 4332227364Sadrian} 4333227364Sadrian 4334227364Sadrian/* 4335227364Sadrian * This is called whenever the pending ADDBA request times out. 4336227364Sadrian * Unpause and reschedule the TID. 4337227364Sadrian */ 4338227364Sadrianvoid 4339227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 4340227364Sadrian struct ieee80211_tx_ampdu *tap) 4341227364Sadrian{ 4342227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4343234324Sadrian int tid = tap->txa_tid; 4344227364Sadrian struct ath_node *an = ATH_NODE(ni); 4345227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4346227364Sadrian 4347227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4348227364Sadrian "%s: called; resuming\n", __func__); 4349227364Sadrian 4350235774Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4351235774Sadrian atid->addba_tx_pending = 0; 4352235774Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4353235774Sadrian 4354227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 4355227364Sadrian sc->sc_addba_response_timeout(ni, tap); 4356227364Sadrian 4357227364Sadrian /* Unpause the TID; which reschedules it */ 4358227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4359227364Sadrian ath_tx_tid_resume(sc, atid); 4360227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4361227364Sadrian} 4362