if_ath_tx.c revision 227364
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 227364 2011-11-08 22:43:13Z adrian $"); 32218065Sadrian 33218065Sadrian/* 34218065Sadrian * Driver for the Atheros Wireless LAN controller. 35218065Sadrian * 36218065Sadrian * This software is derived from work of Atsushi Onoe; his contribution 37218065Sadrian * is greatly appreciated. 38218065Sadrian */ 39218065Sadrian 40218065Sadrian#include "opt_inet.h" 41218065Sadrian#include "opt_ath.h" 42218065Sadrian#include "opt_wlan.h" 43218065Sadrian 44218065Sadrian#include <sys/param.h> 45218065Sadrian#include <sys/systm.h> 46218065Sadrian#include <sys/sysctl.h> 47218065Sadrian#include <sys/mbuf.h> 48218065Sadrian#include <sys/malloc.h> 49218065Sadrian#include <sys/lock.h> 50218065Sadrian#include <sys/mutex.h> 51218065Sadrian#include <sys/kernel.h> 52218065Sadrian#include <sys/socket.h> 53218065Sadrian#include <sys/sockio.h> 54218065Sadrian#include <sys/errno.h> 55218065Sadrian#include <sys/callout.h> 56218065Sadrian#include <sys/bus.h> 57218065Sadrian#include <sys/endian.h> 58218065Sadrian#include <sys/kthread.h> 59218065Sadrian#include <sys/taskqueue.h> 60218065Sadrian#include <sys/priv.h> 61218065Sadrian 62218065Sadrian#include <machine/bus.h> 63218065Sadrian 64218065Sadrian#include <net/if.h> 65218065Sadrian#include <net/if_dl.h> 66218065Sadrian#include <net/if_media.h> 67218065Sadrian#include <net/if_types.h> 68218065Sadrian#include <net/if_arp.h> 69218065Sadrian#include <net/ethernet.h> 70218065Sadrian#include <net/if_llc.h> 71218065Sadrian 72218065Sadrian#include <net80211/ieee80211_var.h> 73218065Sadrian#include <net80211/ieee80211_regdomain.h> 74218065Sadrian#ifdef IEEE80211_SUPPORT_SUPERG 75218065Sadrian#include <net80211/ieee80211_superg.h> 76218065Sadrian#endif 77218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 78218065Sadrian#include <net80211/ieee80211_tdma.h> 79218065Sadrian#endif 80227364Sadrian#include <net80211/ieee80211_ht.h> 81218065Sadrian 82218065Sadrian#include <net/bpf.h> 83218065Sadrian 84218065Sadrian#ifdef INET 85218065Sadrian#include <netinet/in.h> 86218065Sadrian#include <netinet/if_ether.h> 87218065Sadrian#endif 88218065Sadrian 89218065Sadrian#include <dev/ath/if_athvar.h> 90218065Sadrian#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */ 91218065Sadrian#include <dev/ath/ath_hal/ah_diagcodes.h> 92218065Sadrian 93218065Sadrian#include <dev/ath/if_ath_debug.h> 94218065Sadrian 95218065Sadrian#ifdef ATH_TX99_DIAG 96218065Sadrian#include <dev/ath/ath_tx99/ath_tx99.h> 97218065Sadrian#endif 98218065Sadrian 99218065Sadrian#include <dev/ath/if_ath_misc.h> 100218065Sadrian#include <dev/ath/if_ath_tx.h> 101218240Sadrian#include <dev/ath/if_ath_tx_ht.h> 102218065Sadrian 103218154Sadrian/* 104227364Sadrian * How many retries to perform in software 105227364Sadrian */ 106227364Sadrian#define SWMAX_RETRIES 10 107227364Sadrian 108227364Sadrianstatic int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, 109227364Sadrian int tid); 110227364Sadrianstatic int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, 111227364Sadrian int tid); 112227364Sadrianstatic ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc, 113227364Sadrian struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0); 114227364Sadrianstatic int ath_tx_action_frame_override_queue(struct ath_softc *sc, 115227364Sadrian struct ieee80211_node *ni, struct mbuf *m0, int *tid); 116227364Sadrian 117227364Sadrian/* 118218154Sadrian * Whether to use the 11n rate scenario functions or not 119218154Sadrian */ 120218154Sadrianstatic inline int 121218154Sadrianath_tx_is_11n(struct ath_softc *sc) 122218154Sadrian{ 123218154Sadrian return (sc->sc_ah->ah_magic == 0x20065416); 124218154Sadrian} 125218154Sadrian 126227364Sadrian/* 127227364Sadrian * Obtain the current TID from the given frame. 128227364Sadrian * 129227364Sadrian * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.) 130227364Sadrian * This has implications for which AC/priority the packet is placed 131227364Sadrian * in. 132227364Sadrian */ 133227364Sadrianstatic int 134227364Sadrianath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0) 135227364Sadrian{ 136227364Sadrian const struct ieee80211_frame *wh; 137227364Sadrian int pri = M_WME_GETAC(m0); 138227364Sadrian 139227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 140227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 141227364Sadrian return IEEE80211_NONQOS_TID; 142227364Sadrian else 143227364Sadrian return WME_AC_TO_TID(pri); 144227364Sadrian} 145227364Sadrian 146227364Sadrian/* 147227364Sadrian * Determine what the correct AC queue for the given frame 148227364Sadrian * should be. 149227364Sadrian * 150227364Sadrian * This code assumes that the TIDs map consistently to 151227364Sadrian * the underlying hardware (or software) ath_txq. 152227364Sadrian * Since the sender may try to set an AC which is 153227364Sadrian * arbitrary, non-QoS TIDs may end up being put on 154227364Sadrian * completely different ACs. There's no way to put a 155227364Sadrian * TID into multiple ath_txq's for scheduling, so 156227364Sadrian * for now we override the AC/TXQ selection and set 157227364Sadrian * non-QOS TID frames into the BE queue. 158227364Sadrian * 159227364Sadrian * This may be completely incorrect - specifically, 160227364Sadrian * some management frames may end up out of order 161227364Sadrian * compared to the QoS traffic they're controlling. 162227364Sadrian * I'll look into this later. 163227364Sadrian */ 164227364Sadrianstatic int 165227364Sadrianath_tx_getac(struct ath_softc *sc, const struct mbuf *m0) 166227364Sadrian{ 167227364Sadrian const struct ieee80211_frame *wh; 168227364Sadrian int pri = M_WME_GETAC(m0); 169227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 170227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh)) 171227364Sadrian return pri; 172227364Sadrian 173227364Sadrian return WME_AC_BE; 174227364Sadrian} 175227364Sadrian 176218065Sadrianvoid 177218065Sadrianath_txfrag_cleanup(struct ath_softc *sc, 178218065Sadrian ath_bufhead *frags, struct ieee80211_node *ni) 179218065Sadrian{ 180218065Sadrian struct ath_buf *bf, *next; 181218065Sadrian 182218065Sadrian ATH_TXBUF_LOCK_ASSERT(sc); 183218065Sadrian 184227344Sadrian TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) { 185218065Sadrian /* NB: bf assumed clean */ 186227344Sadrian TAILQ_REMOVE(frags, bf, bf_list); 187227344Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); 188218065Sadrian ieee80211_node_decref(ni); 189218065Sadrian } 190218065Sadrian} 191218065Sadrian 192218065Sadrian/* 193218065Sadrian * Setup xmit of a fragmented frame. Allocate a buffer 194218065Sadrian * for each frag and bump the node reference count to 195218065Sadrian * reflect the held reference to be setup by ath_tx_start. 196218065Sadrian */ 197218065Sadrianint 198218065Sadrianath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags, 199218065Sadrian struct mbuf *m0, struct ieee80211_node *ni) 200218065Sadrian{ 201218065Sadrian struct mbuf *m; 202218065Sadrian struct ath_buf *bf; 203218065Sadrian 204218065Sadrian ATH_TXBUF_LOCK(sc); 205218065Sadrian for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) { 206218065Sadrian bf = _ath_getbuf_locked(sc); 207218065Sadrian if (bf == NULL) { /* out of buffers, cleanup */ 208218065Sadrian ath_txfrag_cleanup(sc, frags, ni); 209218065Sadrian break; 210218065Sadrian } 211218065Sadrian ieee80211_node_incref(ni); 212227344Sadrian TAILQ_INSERT_TAIL(frags, bf, bf_list); 213218065Sadrian } 214218065Sadrian ATH_TXBUF_UNLOCK(sc); 215218065Sadrian 216227344Sadrian return !TAILQ_EMPTY(frags); 217218065Sadrian} 218218065Sadrian 219218065Sadrian/* 220218065Sadrian * Reclaim mbuf resources. For fragmented frames we 221218065Sadrian * need to claim each frag chained with m_nextpkt. 222218065Sadrian */ 223218065Sadrianvoid 224218065Sadrianath_freetx(struct mbuf *m) 225218065Sadrian{ 226218065Sadrian struct mbuf *next; 227218065Sadrian 228218065Sadrian do { 229218065Sadrian next = m->m_nextpkt; 230218065Sadrian m->m_nextpkt = NULL; 231218065Sadrian m_freem(m); 232218065Sadrian } while ((m = next) != NULL); 233218065Sadrian} 234218065Sadrian 235218065Sadrianstatic int 236218065Sadrianath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0) 237218065Sadrian{ 238218065Sadrian struct mbuf *m; 239218065Sadrian int error; 240218065Sadrian 241218065Sadrian /* 242218065Sadrian * Load the DMA map so any coalescing is done. This 243218065Sadrian * also calculates the number of descriptors we need. 244218065Sadrian */ 245218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 246218065Sadrian bf->bf_segs, &bf->bf_nseg, 247218065Sadrian BUS_DMA_NOWAIT); 248218065Sadrian if (error == EFBIG) { 249218065Sadrian /* XXX packet requires too many descriptors */ 250218065Sadrian bf->bf_nseg = ATH_TXDESC+1; 251218065Sadrian } else if (error != 0) { 252218065Sadrian sc->sc_stats.ast_tx_busdma++; 253218065Sadrian ath_freetx(m0); 254218065Sadrian return error; 255218065Sadrian } 256218065Sadrian /* 257218065Sadrian * Discard null packets and check for packets that 258218065Sadrian * require too many TX descriptors. We try to convert 259218065Sadrian * the latter to a cluster. 260218065Sadrian */ 261218065Sadrian if (bf->bf_nseg > ATH_TXDESC) { /* too many desc's, linearize */ 262218065Sadrian sc->sc_stats.ast_tx_linear++; 263218065Sadrian m = m_collapse(m0, M_DONTWAIT, ATH_TXDESC); 264218065Sadrian if (m == NULL) { 265218065Sadrian ath_freetx(m0); 266218065Sadrian sc->sc_stats.ast_tx_nombuf++; 267218065Sadrian return ENOMEM; 268218065Sadrian } 269218065Sadrian m0 = m; 270218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 271218065Sadrian bf->bf_segs, &bf->bf_nseg, 272218065Sadrian BUS_DMA_NOWAIT); 273218065Sadrian if (error != 0) { 274218065Sadrian sc->sc_stats.ast_tx_busdma++; 275218065Sadrian ath_freetx(m0); 276218065Sadrian return error; 277218065Sadrian } 278218065Sadrian KASSERT(bf->bf_nseg <= ATH_TXDESC, 279218065Sadrian ("too many segments after defrag; nseg %u", bf->bf_nseg)); 280218065Sadrian } else if (bf->bf_nseg == 0) { /* null packet, discard */ 281218065Sadrian sc->sc_stats.ast_tx_nodata++; 282218065Sadrian ath_freetx(m0); 283218065Sadrian return EIO; 284218065Sadrian } 285218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", 286218065Sadrian __func__, m0, m0->m_pkthdr.len); 287218065Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 288218065Sadrian bf->bf_m = m0; 289218065Sadrian 290218065Sadrian return 0; 291218065Sadrian} 292218065Sadrian 293227360Sadrian/* 294227360Sadrian * Chain together segments+descriptors for a non-11n frame. 295227360Sadrian */ 296218065Sadrianstatic void 297227364Sadrianath_tx_chaindesclist(struct ath_softc *sc, struct ath_buf *bf) 298218065Sadrian{ 299218065Sadrian struct ath_hal *ah = sc->sc_ah; 300218065Sadrian struct ath_desc *ds, *ds0; 301218065Sadrian int i; 302218065Sadrian 303218065Sadrian /* 304218065Sadrian * Fillin the remainder of the descriptor info. 305218065Sadrian */ 306218065Sadrian ds0 = ds = bf->bf_desc; 307218065Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 308218065Sadrian ds->ds_data = bf->bf_segs[i].ds_addr; 309218065Sadrian if (i == bf->bf_nseg - 1) 310218065Sadrian ds->ds_link = 0; 311218065Sadrian else 312218065Sadrian ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 313218065Sadrian ath_hal_filltxdesc(ah, ds 314218065Sadrian , bf->bf_segs[i].ds_len /* segment length */ 315218065Sadrian , i == 0 /* first segment */ 316218065Sadrian , i == bf->bf_nseg - 1 /* last segment */ 317218065Sadrian , ds0 /* first descriptor */ 318218065Sadrian ); 319218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 320218065Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 321218065Sadrian __func__, i, ds->ds_link, ds->ds_data, 322218065Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 323227360Sadrian bf->bf_lastds = ds; 324218065Sadrian } 325218154Sadrian} 326218154Sadrian 327227364Sadrian/* 328227364Sadrian * Fill in the descriptor list for a aggregate subframe. 329227364Sadrian * 330227364Sadrian * The subframe is returned with the ds_link field in the last subframe 331227364Sadrian * pointing to 0. 332227364Sadrian */ 333218154Sadrianstatic void 334227364Sadrianath_tx_chaindesclist_subframe(struct ath_softc *sc, struct ath_buf *bf) 335218154Sadrian{ 336218154Sadrian struct ath_hal *ah = sc->sc_ah; 337227364Sadrian struct ath_desc *ds, *ds0; 338227364Sadrian int i; 339218154Sadrian 340227364Sadrian ds0 = ds = bf->bf_desc; 341218154Sadrian 342218065Sadrian /* 343227364Sadrian * There's no need to call ath_hal_setupfirsttxdesc here; 344227364Sadrian * That's only going to occur for the first frame in an aggregate. 345227364Sadrian */ 346227364Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 347227364Sadrian ds->ds_data = bf->bf_segs[i].ds_addr; 348227364Sadrian if (i == bf->bf_nseg - 1) 349227364Sadrian ds->ds_link = 0; 350227364Sadrian else 351227364Sadrian ds->ds_link = bf->bf_daddr + sizeof(*ds) * (i + 1); 352227364Sadrian 353227364Sadrian /* 354227364Sadrian * This performs the setup for an aggregate frame. 355227364Sadrian * This includes enabling the aggregate flags if needed. 356227364Sadrian */ 357227364Sadrian ath_hal_chaintxdesc(ah, ds, 358227364Sadrian bf->bf_state.bfs_pktlen, 359227364Sadrian bf->bf_state.bfs_hdrlen, 360227364Sadrian HAL_PKT_TYPE_AMPDU, /* forces aggregate bits to be set */ 361227364Sadrian bf->bf_state.bfs_keyix, 362227364Sadrian 0, /* cipher, calculated from keyix */ 363227364Sadrian bf->bf_state.bfs_ndelim, 364227364Sadrian bf->bf_segs[i].ds_len, /* segment length */ 365227364Sadrian i == 0, /* first segment */ 366227364Sadrian i == bf->bf_nseg - 1 /* last segment */ 367227364Sadrian ); 368227364Sadrian 369227364Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 370227364Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 371227364Sadrian __func__, i, ds->ds_link, ds->ds_data, 372227364Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 373227364Sadrian bf->bf_lastds = ds; 374227364Sadrian } 375227364Sadrian} 376227364Sadrian 377227364Sadrian/* 378227364Sadrian * Setup segments+descriptors for an 11n aggregate. 379227364Sadrian * bf_first is the first buffer in the aggregate. 380227364Sadrian * The descriptor list must already been linked together using 381227364Sadrian * bf->bf_next. 382227364Sadrian */ 383227364Sadrianstatic void 384227364Sadrianath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first) 385227364Sadrian{ 386227364Sadrian struct ath_buf *bf, *bf_prev = NULL; 387227364Sadrian 388227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n", 389227364Sadrian __func__, bf_first->bf_state.bfs_nframes, 390227364Sadrian bf_first->bf_state.bfs_al); 391227364Sadrian 392227364Sadrian /* 393227364Sadrian * Setup all descriptors of all subframes. 394227364Sadrian */ 395227364Sadrian bf = bf_first; 396227364Sadrian while (bf != NULL) { 397227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 398227364Sadrian "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n", 399227364Sadrian __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen, 400227364Sadrian SEQNO(bf->bf_state.bfs_seqno)); 401227364Sadrian 402227364Sadrian /* Sub-frame setup */ 403227364Sadrian ath_tx_chaindesclist_subframe(sc, bf); 404227364Sadrian 405227364Sadrian /* 406227364Sadrian * Link the last descriptor of the previous frame 407227364Sadrian * to the beginning descriptor of this frame. 408227364Sadrian */ 409227364Sadrian if (bf_prev != NULL) 410227364Sadrian bf_prev->bf_lastds->ds_link = bf->bf_daddr; 411227364Sadrian 412227364Sadrian /* Save a copy so we can link the next descriptor in */ 413227364Sadrian bf_prev = bf; 414227364Sadrian bf = bf->bf_next; 415227364Sadrian } 416227364Sadrian 417227364Sadrian /* 418227364Sadrian * Setup first descriptor of first frame. 419227364Sadrian * chaintxdesc() overwrites the descriptor entries; 420227364Sadrian * setupfirsttxdesc() merges in things. 421227364Sadrian * Otherwise various fields aren't set correctly (eg flags). 422227364Sadrian */ 423227364Sadrian ath_hal_setupfirsttxdesc(sc->sc_ah, 424227364Sadrian bf_first->bf_desc, 425227364Sadrian bf_first->bf_state.bfs_al, 426227364Sadrian bf_first->bf_state.bfs_flags | HAL_TXDESC_INTREQ, 427227364Sadrian bf_first->bf_state.bfs_txpower, 428227364Sadrian bf_first->bf_state.bfs_txrate0, 429227364Sadrian bf_first->bf_state.bfs_try0, 430227364Sadrian bf_first->bf_state.bfs_txantenna, 431227364Sadrian bf_first->bf_state.bfs_ctsrate, 432227364Sadrian bf_first->bf_state.bfs_ctsduration); 433227364Sadrian 434227364Sadrian /* 435227364Sadrian * Setup the last descriptor in the list. 436227364Sadrian * bf_prev points to the last; bf is NULL here. 437227364Sadrian */ 438227364Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_desc, bf_first->bf_desc); 439227364Sadrian 440227364Sadrian /* 441227364Sadrian * Set the first descriptor bf_lastds field to point to 442227364Sadrian * the last descriptor in the last subframe, that's where 443227364Sadrian * the status update will occur. 444227364Sadrian */ 445227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 446227364Sadrian 447227364Sadrian /* 448227364Sadrian * And bf_last in the first descriptor points to the end of 449227364Sadrian * the aggregate list. 450227364Sadrian */ 451227364Sadrian bf_first->bf_last = bf_prev; 452227364Sadrian 453227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 454227364Sadrian} 455227364Sadrian 456227364Sadrianstatic void 457227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 458227364Sadrian struct ath_buf *bf) 459227364Sadrian{ 460227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 461227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 462227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 463227364Sadrian if (txq->axq_link != NULL) { 464227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 465227364Sadrian struct ieee80211_frame *wh; 466227364Sadrian 467227364Sadrian /* mark previous frame */ 468227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 469227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 470227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 471227364Sadrian BUS_DMASYNC_PREWRITE); 472227364Sadrian 473227364Sadrian /* link descriptor */ 474227364Sadrian *txq->axq_link = bf->bf_daddr; 475227364Sadrian } 476227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 477227364Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 478227364Sadrian} 479227364Sadrian 480227364Sadrian 481227364Sadrian 482227364Sadrian/* 483227364Sadrian * Hand-off packet to a hardware queue. 484227364Sadrian */ 485227364Sadrianstatic void 486227364Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf) 487227364Sadrian{ 488227364Sadrian struct ath_hal *ah = sc->sc_ah; 489227364Sadrian 490227364Sadrian /* 491218065Sadrian * Insert the frame on the outbound list and pass it on 492218065Sadrian * to the hardware. Multicast frames buffered for power 493218065Sadrian * save stations and transmit from the CAB queue are stored 494218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 495218065Sadrian * the SWBA handler since frames only go out on DTIM and 496218065Sadrian * to avoid possible races. 497218065Sadrian */ 498227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 499218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 500227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 501227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 502227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 503227364Sadrian 504227364Sadrian /* For now, so not to generate whitespace diffs */ 505227364Sadrian if (1) { 506218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 507218065Sadrian int qbusy; 508218065Sadrian 509218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 510218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 511218065Sadrian if (txq->axq_link == NULL) { 512218065Sadrian /* 513218065Sadrian * Be careful writing the address to TXDP. If 514218065Sadrian * the tx q is enabled then this write will be 515218065Sadrian * ignored. Normally this is not an issue but 516218065Sadrian * when tdma is in use and the q is beacon gated 517218065Sadrian * this race can occur. If the q is busy then 518218065Sadrian * defer the work to later--either when another 519218065Sadrian * packet comes along or when we prepare a beacon 520218065Sadrian * frame at SWBA. 521218065Sadrian */ 522218065Sadrian if (!qbusy) { 523218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 524218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 525218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 526218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 527218065Sadrian __func__, txq->axq_qnum, 528218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 529218065Sadrian txq->axq_depth); 530218065Sadrian } else { 531218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 532218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 533218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 534218065Sadrian txq->axq_qnum); 535218065Sadrian } 536218065Sadrian } else { 537218065Sadrian *txq->axq_link = bf->bf_daddr; 538218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 539218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 540218065Sadrian txq->axq_qnum, txq->axq_link, 541218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, txq->axq_depth); 542218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 543218065Sadrian /* 544218065Sadrian * The q was busy when we previously tried 545218065Sadrian * to write the address of the first buffer 546218065Sadrian * in the chain. Since it's not busy now 547218065Sadrian * handle this chore. We are certain the 548218065Sadrian * buffer at the front is the right one since 549218065Sadrian * axq_link is NULL only when the buffer list 550218065Sadrian * is/was empty. 551218065Sadrian */ 552218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 553227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 554218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 555218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 556218065Sadrian "%s: Q%u restarted\n", __func__, 557218065Sadrian txq->axq_qnum); 558218065Sadrian } 559218065Sadrian } 560218065Sadrian#else 561218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 562218065Sadrian if (txq->axq_link == NULL) { 563218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 564218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 565218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 566218065Sadrian __func__, txq->axq_qnum, 567218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 568218065Sadrian txq->axq_depth); 569218065Sadrian } else { 570218065Sadrian *txq->axq_link = bf->bf_daddr; 571218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 572218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 573218065Sadrian txq->axq_qnum, txq->axq_link, 574218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, txq->axq_depth); 575218065Sadrian } 576218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 577227360Sadrian if (bf->bf_state.bfs_aggr) 578227360Sadrian txq->axq_aggr_depth++; 579227360Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 580218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 581227364Sadrian } 582227364Sadrian} 583218065Sadrian 584227364Sadrian/* 585227364Sadrian * Restart TX DMA for the given TXQ. 586227364Sadrian * 587227364Sadrian * This must be called whether the queue is empty or not. 588227364Sadrian */ 589227364Sadrianvoid 590227364Sadrianath_txq_restart_dma(struct ath_softc *sc, struct ath_txq *txq) 591227364Sadrian{ 592227364Sadrian struct ath_hal *ah = sc->sc_ah; 593227364Sadrian struct ath_buf *bf; 594218065Sadrian 595227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 596227364Sadrian 597227364Sadrian /* This is always going to be cleared, empty or not */ 598227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 599227364Sadrian 600227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 601227364Sadrian if (bf == NULL) 602227364Sadrian return; 603227364Sadrian 604227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 605227364Sadrian txq->axq_link = &bf->bf_lastds->ds_link; 606227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 607218065Sadrian} 608218065Sadrian 609227364Sadrian/* 610227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 611227364Sadrian * 612227364Sadrian * The relevant hardware txq should be locked. 613227364Sadrian */ 614227364Sadrianstatic void 615227364Sadrianath_tx_handoff(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf) 616227364Sadrian{ 617227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 618227364Sadrian 619227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 620227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 621227364Sadrian else 622227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 623227364Sadrian} 624227364Sadrian 625218154Sadrianstatic int 626218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 627218154Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, int *keyix) 628218154Sadrian{ 629218154Sadrian if (iswep) { 630218154Sadrian const struct ieee80211_cipher *cip; 631218154Sadrian struct ieee80211_key *k; 632218154Sadrian 633218154Sadrian /* 634218154Sadrian * Construct the 802.11 header+trailer for an encrypted 635218154Sadrian * frame. The only reason this can fail is because of an 636218154Sadrian * unknown or unsupported cipher/key type. 637218154Sadrian */ 638218154Sadrian k = ieee80211_crypto_encap(ni, m0); 639218154Sadrian if (k == NULL) { 640218154Sadrian /* 641218154Sadrian * This can happen when the key is yanked after the 642218154Sadrian * frame was queued. Just discard the frame; the 643218154Sadrian * 802.11 layer counts failures and provides 644218154Sadrian * debugging/diagnostics. 645218154Sadrian */ 646218154Sadrian return 0; 647218154Sadrian } 648218154Sadrian /* 649218154Sadrian * Adjust the packet + header lengths for the crypto 650218154Sadrian * additions and calculate the h/w key index. When 651218154Sadrian * a s/w mic is done the frame will have had any mic 652218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 653218154Sadrian * account for it. Otherwise we need to add it to the 654218154Sadrian * packet length. 655218154Sadrian */ 656218154Sadrian cip = k->wk_cipher; 657218154Sadrian (*hdrlen) += cip->ic_header; 658218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 659218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 660218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 661218154Sadrian (*pktlen) += cip->ic_miclen; 662218154Sadrian (*keyix) = k->wk_keyix; 663218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 664218154Sadrian /* 665218154Sadrian * Use station key cache slot, if assigned. 666218154Sadrian */ 667218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 668218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 669218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 670218154Sadrian } else 671218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 672218154Sadrian 673218154Sadrian return 1; 674218154Sadrian} 675218154Sadrian 676218932Sadrianstatic uint8_t 677218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 678227364Sadrian int cix, int shortPreamble) 679218157Sadrian{ 680218932Sadrian uint8_t ctsrate; 681218932Sadrian 682218157Sadrian /* 683218157Sadrian * CTS transmit rate is derived from the transmit rate 684218157Sadrian * by looking in the h/w rate table. We must also factor 685218157Sadrian * in whether or not a short preamble is to be used. 686218157Sadrian */ 687218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 688218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 689218932Sadrian ctsrate = rt->info[cix].rateCode; 690218932Sadrian 691218932Sadrian /* XXX this should only matter for legacy rates */ 692218932Sadrian if (shortPreamble) 693218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 694218932Sadrian 695218932Sadrian return ctsrate; 696218932Sadrian} 697218932Sadrian 698218932Sadrian/* 699218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 700218932Sadrian */ 701218932Sadrianstatic int 702218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 703218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 704218932Sadrian int flags) 705218932Sadrian{ 706218932Sadrian int ctsduration = 0; 707218932Sadrian 708218932Sadrian /* This mustn't be called for HT modes */ 709218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 710218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 711218932Sadrian __func__, rt->info[cix].rateCode); 712218932Sadrian return -1; 713218932Sadrian } 714218932Sadrian 715218157Sadrian /* 716218157Sadrian * Compute the transmit duration based on the frame 717218157Sadrian * size and the size of an ACK frame. We call into the 718218157Sadrian * HAL to do the computation since it depends on the 719218157Sadrian * characteristics of the actual PHY being used. 720218157Sadrian * 721218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 722218157Sadrian * use the precalculated ACK durations. 723218157Sadrian */ 724218157Sadrian if (shortPreamble) { 725218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 726218932Sadrian ctsduration += rt->info[cix].spAckDuration; 727218932Sadrian ctsduration += ath_hal_computetxtime(ah, 728218157Sadrian rt, pktlen, rix, AH_TRUE); 729218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 730218932Sadrian ctsduration += rt->info[rix].spAckDuration; 731218157Sadrian } else { 732218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 733218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 734218932Sadrian ctsduration += ath_hal_computetxtime(ah, 735218157Sadrian rt, pktlen, rix, AH_FALSE); 736218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 737218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 738218157Sadrian } 739218932Sadrian 740218932Sadrian return ctsduration; 741218157Sadrian} 742218157Sadrian 743227364Sadrian/* 744227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 745227364Sadrian * values. 746227364Sadrian * 747227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 748227364Sadrian * and cts duration must be re-calculated. 749227364Sadrian * 750227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 751227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 752227364Sadrian * 753227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 754227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 755227364Sadrian */ 756227364Sadrianstatic void 757227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 758218065Sadrian{ 759227364Sadrian uint16_t ctsduration = 0; 760227364Sadrian uint8_t ctsrate = 0; 761227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 762227364Sadrian uint8_t cix = 0; 763227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 764227364Sadrian 765227364Sadrian /* 766227364Sadrian * No RTS/CTS enabled? Don't bother. 767227364Sadrian */ 768227364Sadrian if ((bf->bf_state.bfs_flags & 769227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 770227364Sadrian /* XXX is this really needed? */ 771227364Sadrian bf->bf_state.bfs_ctsrate = 0; 772227364Sadrian bf->bf_state.bfs_ctsduration = 0; 773227364Sadrian return; 774227364Sadrian } 775227364Sadrian 776227364Sadrian /* 777227364Sadrian * If protection is enabled, use the protection rix control 778227364Sadrian * rate. Otherwise use the rate0 control rate. 779227364Sadrian */ 780227364Sadrian if (bf->bf_state.bfs_doprot) 781227364Sadrian rix = sc->sc_protrix; 782227364Sadrian else 783227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 784227364Sadrian 785227364Sadrian /* 786227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 787227364Sadrian * use it. 788227364Sadrian */ 789227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 790227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 791227364Sadrian else 792227364Sadrian /* Control rate from above */ 793227364Sadrian cix = rt->info[rix].controlRate; 794227364Sadrian 795227364Sadrian /* Calculate the rtscts rate for the given cix */ 796227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 797227364Sadrian bf->bf_state.bfs_shpream); 798227364Sadrian 799227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 800227364Sadrian if (! ath_tx_is_11n(sc)) 801227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 802227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 803227364Sadrian rt, bf->bf_state.bfs_flags); 804227364Sadrian 805227364Sadrian /* Squirrel away in ath_buf */ 806227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 807227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 808227364Sadrian 809227364Sadrian /* 810227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 811227364Sadrian * XXX TODO: only for pre-11n NICs. 812227364Sadrian */ 813227364Sadrian bf->bf_state.bfs_ismrr = 0; 814227364Sadrian bf->bf_state.bfs_try0 = 815227364Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 816227364Sadrian} 817227364Sadrian 818227364Sadrian/* 819227364Sadrian * Setup the descriptor chain for a normal or fast-frame 820227364Sadrian * frame. 821227364Sadrian */ 822227364Sadrianstatic void 823227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 824227364Sadrian{ 825227364Sadrian struct ath_desc *ds = bf->bf_desc; 826227364Sadrian struct ath_hal *ah = sc->sc_ah; 827227364Sadrian 828227364Sadrian ath_hal_setuptxdesc(ah, ds 829227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 830227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 831227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 832227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 833227364Sadrian , bf->bf_state.bfs_txrate0 834227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 835227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 836227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 837227364Sadrian , bf->bf_state.bfs_flags /* flags */ 838227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 839227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 840227364Sadrian ); 841227364Sadrian 842227364Sadrian /* 843227364Sadrian * This will be overriden when the descriptor chain is written. 844227364Sadrian */ 845227364Sadrian bf->bf_lastds = ds; 846227364Sadrian bf->bf_last = bf; 847227364Sadrian 848227364Sadrian /* XXX TODO: Setup descriptor chain */ 849227364Sadrian} 850227364Sadrian 851227364Sadrian/* 852227364Sadrian * Do a rate lookup. 853227364Sadrian * 854227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 855227364Sadrian * Non-data frames and raw frames don't require it. 856227364Sadrian * 857227364Sadrian * This populates the primary and MRR entries; MRR values are 858227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 859227364Sadrian * pre-11n chipsets. 860227364Sadrian * 861227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 862227364Sadrian * as they may depend upon the rate chosen. 863227364Sadrian */ 864227364Sadrianstatic void 865227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 866227364Sadrian{ 867227364Sadrian uint8_t rate, rix; 868227364Sadrian int try0; 869227364Sadrian 870227364Sadrian if (! bf->bf_state.bfs_doratelookup) 871227364Sadrian return; 872227364Sadrian 873227364Sadrian /* Get rid of any previous state */ 874227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 875227364Sadrian 876227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 877227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 878227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 879227364Sadrian 880227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 881227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 882227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 883227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 884227364Sadrian 885227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 886227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 887227364Sadrian bf->bf_state.bfs_rc); 888227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 889227364Sadrian 890227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 891227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 892227364Sadrian bf->bf_state.bfs_try0 = try0; 893227364Sadrian bf->bf_state.bfs_txrate0 = rate; 894227364Sadrian} 895227364Sadrian 896227364Sadrian/* 897227364Sadrian * Set the rate control fields in the given descriptor based on 898227364Sadrian * the bf_state fields and node state. 899227364Sadrian * 900227364Sadrian * The bfs fields should already be set with the relevant rate 901227364Sadrian * control information, including whether MRR is to be enabled. 902227364Sadrian * 903227364Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 904227364Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 905227364Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 906227364Sadrian * unconditionally for 11n chips. These require the 11n rate 907227364Sadrian * scenario to be set if MCS rates are enabled, so it's easier 908227364Sadrian * to just always call it. The caller can then only set rates 2, 3 909227364Sadrian * and 4 if multi-rate retry is needed. 910227364Sadrian */ 911227364Sadrianstatic void 912227364Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 913227364Sadrian struct ath_buf *bf) 914227364Sadrian{ 915227364Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 916227364Sadrian 917227364Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 918227364Sadrian if (! bf->bf_state.bfs_ismrr) 919227364Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 920227364Sadrian 921227364Sadrian /* 922227364Sadrian * Always call - that way a retried descriptor will 923227364Sadrian * have the MRR fields overwritten. 924227364Sadrian * 925227364Sadrian * XXX TODO: see if this is really needed - setting up 926227364Sadrian * the first descriptor should set the MRR fields to 0 927227364Sadrian * for us anyway. 928227364Sadrian */ 929227364Sadrian if (ath_tx_is_11n(sc)) { 930227364Sadrian ath_buf_set_rate(sc, ni, bf); 931227364Sadrian } else { 932227364Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 933227364Sadrian , rc[1].ratecode, rc[1].tries 934227364Sadrian , rc[2].ratecode, rc[2].tries 935227364Sadrian , rc[3].ratecode, rc[3].tries 936227364Sadrian ); 937227364Sadrian } 938227364Sadrian} 939227364Sadrian 940227364Sadrian/* 941227364Sadrian * Transmit the given frame to the hardware. 942227364Sadrian * 943227364Sadrian * The frame must already be setup; rate control must already have 944227364Sadrian * been done. 945227364Sadrian * 946227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 947227364Sadrian * it for this long when not doing software aggregation), later on 948227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 949227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 950227364Sadrian */ 951227364Sadrianstatic void 952227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 953227364Sadrian struct ath_buf *bf) 954227364Sadrian{ 955227364Sadrian 956227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 957227364Sadrian 958227364Sadrian /* Setup the descriptor before handoff */ 959227364Sadrian ath_tx_do_ratelookup(sc, bf); 960227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 961227364Sadrian ath_tx_set_rtscts(sc, bf); 962227364Sadrian ath_tx_setds(sc, bf); 963227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 964227364Sadrian ath_tx_chaindesclist(sc, bf); 965227364Sadrian 966227364Sadrian /* Hand off to hardware */ 967227364Sadrian ath_tx_handoff(sc, txq, bf); 968227364Sadrian} 969227364Sadrian 970227364Sadrian 971227364Sadrian 972227364Sadrianstatic int 973227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 974227364Sadrian struct ath_buf *bf, struct mbuf *m0) 975227364Sadrian{ 976218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 977218065Sadrian struct ath_vap *avp = ATH_VAP(vap); 978218065Sadrian struct ath_hal *ah = sc->sc_ah; 979218065Sadrian struct ifnet *ifp = sc->sc_ifp; 980218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 981218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 982218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 983227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 984227364Sadrian u_int8_t rix = 0, txrate = 0; 985218065Sadrian struct ath_desc *ds; 986218065Sadrian struct ath_txq *txq; 987218065Sadrian struct ieee80211_frame *wh; 988227364Sadrian u_int subtype, flags; 989218065Sadrian HAL_PKT_TYPE atype; 990218065Sadrian const HAL_RATE_TABLE *rt; 991218065Sadrian HAL_BOOL shortPreamble; 992218065Sadrian struct ath_node *an; 993218065Sadrian u_int pri; 994218065Sadrian 995218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 996218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 997218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 998218065Sadrian isfrag = m0->m_flags & M_FRAG; 999218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1000218065Sadrian /* 1001218065Sadrian * Packet length must not include any 1002218065Sadrian * pad bytes; deduct them here. 1003218065Sadrian */ 1004218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1005218065Sadrian 1006218154Sadrian /* Handle encryption twiddling if needed */ 1007227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1008227364Sadrian &pktlen, &keyix)) { 1009218154Sadrian ath_freetx(m0); 1010218154Sadrian return EIO; 1011218154Sadrian } 1012218065Sadrian 1013218154Sadrian /* packet header may have moved, reset our local pointer */ 1014218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1015218065Sadrian 1016218065Sadrian pktlen += IEEE80211_CRC_LEN; 1017218065Sadrian 1018218065Sadrian /* 1019218065Sadrian * Load the DMA map so any coalescing is done. This 1020218065Sadrian * also calculates the number of descriptors we need. 1021218065Sadrian */ 1022218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1023218065Sadrian if (error != 0) 1024218065Sadrian return error; 1025218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1026218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1027218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1028218065Sadrian 1029218065Sadrian /* setup descriptors */ 1030218065Sadrian ds = bf->bf_desc; 1031218065Sadrian rt = sc->sc_currates; 1032218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1033218065Sadrian 1034218065Sadrian /* 1035218065Sadrian * NB: the 802.11 layer marks whether or not we should 1036218065Sadrian * use short preamble based on the current mode and 1037218065Sadrian * negotiated parameters. 1038218065Sadrian */ 1039218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1040218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1041218065Sadrian shortPreamble = AH_TRUE; 1042218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1043218065Sadrian } else { 1044218065Sadrian shortPreamble = AH_FALSE; 1045218065Sadrian } 1046218065Sadrian 1047218065Sadrian an = ATH_NODE(ni); 1048218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1049218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1050218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1051218065Sadrian /* XXX use txparams instead of fixed values */ 1052218065Sadrian /* 1053218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1054218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1055218065Sadrian */ 1056218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1057218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1058218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1059218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1060218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1061218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1062218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1063218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1064218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1065218065Sadrian else 1066218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1067218065Sadrian rix = an->an_mgmtrix; 1068218065Sadrian txrate = rt->info[rix].rateCode; 1069218065Sadrian if (shortPreamble) 1070218065Sadrian txrate |= rt->info[rix].shortPreamble; 1071218065Sadrian try0 = ATH_TXMGTTRY; 1072218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1073218065Sadrian break; 1074218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1075218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1076218065Sadrian rix = an->an_mgmtrix; 1077218065Sadrian txrate = rt->info[rix].rateCode; 1078218065Sadrian if (shortPreamble) 1079218065Sadrian txrate |= rt->info[rix].shortPreamble; 1080218065Sadrian try0 = ATH_TXMGTTRY; 1081218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1082218065Sadrian break; 1083218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1084218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1085218065Sadrian /* 1086218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1087218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1088218065Sadrian * the rate control module for the rate to use. 1089218065Sadrian */ 1090218065Sadrian if (ismcast) { 1091218065Sadrian rix = an->an_mcastrix; 1092218065Sadrian txrate = rt->info[rix].rateCode; 1093218065Sadrian if (shortPreamble) 1094218065Sadrian txrate |= rt->info[rix].shortPreamble; 1095218065Sadrian try0 = 1; 1096218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1097218065Sadrian /* XXX? maybe always use long preamble? */ 1098218065Sadrian rix = an->an_mgmtrix; 1099218065Sadrian txrate = rt->info[rix].rateCode; 1100218065Sadrian if (shortPreamble) 1101218065Sadrian txrate |= rt->info[rix].shortPreamble; 1102218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1103218065Sadrian } else { 1104227364Sadrian /* 1105227364Sadrian * Do rate lookup on each TX, rather than using 1106227364Sadrian * the hard-coded TX information decided here. 1107227364Sadrian */ 1108227364Sadrian ismrr = 1; 1109227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1110218065Sadrian } 1111218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1112218065Sadrian flags |= HAL_TXDESC_NOACK; 1113218065Sadrian break; 1114218065Sadrian default: 1115218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1116218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1117218065Sadrian /* XXX statistic */ 1118218065Sadrian ath_freetx(m0); 1119218065Sadrian return EIO; 1120218065Sadrian } 1121218065Sadrian txq = sc->sc_ac2q[pri]; 1122218065Sadrian 1123218065Sadrian /* 1124218065Sadrian * When servicing one or more stations in power-save mode 1125218065Sadrian * (or) if there is some mcast data waiting on the mcast 1126218065Sadrian * queue (to prevent out of order delivery) multicast 1127218065Sadrian * frames must be buffered until after the beacon. 1128218065Sadrian */ 1129218065Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1130218065Sadrian txq = &avp->av_mcastq; 1131218065Sadrian 1132218065Sadrian /* 1133218065Sadrian * Calculate miscellaneous flags. 1134218065Sadrian */ 1135218065Sadrian if (ismcast) { 1136218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1137218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1138218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1139218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1140218065Sadrian sc->sc_stats.ast_tx_rts++; 1141218065Sadrian } 1142218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1143218065Sadrian sc->sc_stats.ast_tx_noack++; 1144218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1145218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1146218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1147218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1148218065Sadrian sc->sc_stats.ast_tdma_ack++; 1149218065Sadrian ath_freetx(m0); 1150218065Sadrian return EIO; 1151218065Sadrian } 1152218065Sadrian#endif 1153218065Sadrian 1154218065Sadrian /* 1155218065Sadrian * If 802.11g protection is enabled, determine whether 1156218065Sadrian * to use RTS/CTS or just CTS. Note that this is only 1157218065Sadrian * done for OFDM unicast frames. 1158218065Sadrian */ 1159218065Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 1160218065Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 1161218065Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1162227364Sadrian bf->bf_state.bfs_doprot = 1; 1163218065Sadrian /* XXX fragments must use CCK rates w/ protection */ 1164227364Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 1165218065Sadrian flags |= HAL_TXDESC_RTSENA; 1166227364Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 1167218065Sadrian flags |= HAL_TXDESC_CTSENA; 1168227364Sadrian } 1169227364Sadrian /* 1170227364Sadrian * For frags it would be desirable to use the 1171227364Sadrian * highest CCK rate for RTS/CTS. But stations 1172227364Sadrian * farther away may detect it at a lower CCK rate 1173227364Sadrian * so use the configured protection rate instead 1174227364Sadrian * (for now). 1175227364Sadrian */ 1176218065Sadrian sc->sc_stats.ast_tx_protect++; 1177218065Sadrian } 1178218065Sadrian 1179220098Sadrian#if 0 1180218065Sadrian /* 1181220098Sadrian * If 11n protection is enabled and it's a HT frame, 1182220098Sadrian * enable RTS. 1183220098Sadrian * 1184220098Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 1185220098Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 1186220098Sadrian * XXX indicates it's not a HT pure environment? 1187220098Sadrian */ 1188220098Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 1189220098Sadrian rt->info[rix].phy == IEEE80211_T_HT && 1190220098Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1191220098Sadrian cix = rt->info[sc->sc_protrix].controlRate; 1192220098Sadrian flags |= HAL_TXDESC_RTSENA; 1193220098Sadrian sc->sc_stats.ast_tx_htprotect++; 1194220098Sadrian } 1195220098Sadrian#endif 1196220098Sadrian 1197220098Sadrian /* 1198218065Sadrian * Calculate duration. This logically belongs in the 802.11 1199218065Sadrian * layer but it lacks sufficient information to calculate it. 1200218065Sadrian */ 1201218065Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 1202218065Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 1203218065Sadrian u_int16_t dur; 1204218065Sadrian if (shortPreamble) 1205218065Sadrian dur = rt->info[rix].spAckDuration; 1206218065Sadrian else 1207218065Sadrian dur = rt->info[rix].lpAckDuration; 1208218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 1209218065Sadrian dur += dur; /* additional SIFS+ACK */ 1210218065Sadrian KASSERT(m0->m_nextpkt != NULL, ("no fragment")); 1211218065Sadrian /* 1212218065Sadrian * Include the size of next fragment so NAV is 1213218065Sadrian * updated properly. The last fragment uses only 1214218065Sadrian * the ACK duration 1215218065Sadrian */ 1216218065Sadrian dur += ath_hal_computetxtime(ah, rt, 1217218065Sadrian m0->m_nextpkt->m_pkthdr.len, 1218218065Sadrian rix, shortPreamble); 1219218065Sadrian } 1220218065Sadrian if (isfrag) { 1221218065Sadrian /* 1222218065Sadrian * Force hardware to use computed duration for next 1223218065Sadrian * fragment by disabling multi-rate retry which updates 1224218065Sadrian * duration based on the multi-rate duration table. 1225218065Sadrian */ 1226218065Sadrian ismrr = 0; 1227218065Sadrian try0 = ATH_TXMGTTRY; /* XXX? */ 1228218065Sadrian } 1229218065Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 1230218065Sadrian } 1231218065Sadrian 1232218065Sadrian /* 1233227364Sadrian * Determine if a tx interrupt should be generated for 1234227364Sadrian * this descriptor. We take a tx interrupt to reap 1235227364Sadrian * descriptors when the h/w hits an EOL condition or 1236227364Sadrian * when the descriptor is specifically marked to generate 1237227364Sadrian * an interrupt. We periodically mark descriptors in this 1238227364Sadrian * way to insure timely replenishing of the supply needed 1239227364Sadrian * for sending frames. Defering interrupts reduces system 1240227364Sadrian * load and potentially allows more concurrent work to be 1241227364Sadrian * done but if done to aggressively can cause senders to 1242227364Sadrian * backup. 1243227364Sadrian * 1244227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1245227364Sadrian * dynamically through sysctl. 1246218065Sadrian */ 1247227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1248227364Sadrian txq->axq_intrcnt = 0; 1249227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1250227364Sadrian flags |= HAL_TXDESC_INTREQ; 1251227364Sadrian txq->axq_intrcnt = 0; 1252227364Sadrian } 1253218932Sadrian 1254227364Sadrian /* This point forward is actual TX bits */ 1255218065Sadrian 1256218065Sadrian /* 1257218065Sadrian * At this point we are committed to sending the frame 1258218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1259218065Sadrian * case this frame is part of frag chain. 1260218065Sadrian */ 1261218065Sadrian m0->m_nextpkt = NULL; 1262218065Sadrian 1263218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1264218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1265218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1266218065Sadrian 1267218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1268218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1269218065Sadrian 1270218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1271218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1272218065Sadrian if (iswep) 1273218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1274218065Sadrian if (isfrag) 1275218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1276218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1277218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1278218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1279218065Sadrian 1280218065Sadrian ieee80211_radiotap_tx(vap, m0); 1281218065Sadrian } 1282218065Sadrian 1283227364Sadrian /* Blank the legacy rate array */ 1284227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1285227364Sadrian 1286218065Sadrian /* 1287227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1288227364Sadrian * the rate scenario. 1289227364Sadrian */ 1290227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1291227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1292227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1293227364Sadrian 1294227364Sadrian /* Store the decided rate index values away */ 1295227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1296227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1297227364Sadrian bf->bf_state.bfs_atype = atype; 1298227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1299227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1300227364Sadrian bf->bf_state.bfs_try0 = try0; 1301227364Sadrian bf->bf_state.bfs_keyix = keyix; 1302227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1303227364Sadrian bf->bf_state.bfs_flags = flags; 1304227364Sadrian bf->bf_txflags = flags; 1305227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1306227364Sadrian 1307227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1308227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1309227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1310227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1311227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1312227364Sadrian 1313227364Sadrian return 0; 1314227364Sadrian} 1315227364Sadrian 1316227364Sadrian/* 1317227364Sadrian * Direct-dispatch the current frame to the hardware. 1318227364Sadrian * 1319227364Sadrian * This can be called by the net80211 code. 1320227364Sadrian * 1321227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1322227364Sadrian * XXX aggregate scheduler so its serialised? 1323227364Sadrian */ 1324227364Sadrianint 1325227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1326227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1327227364Sadrian{ 1328227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1329227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1330227364Sadrian int r; 1331227364Sadrian u_int pri; 1332227364Sadrian int tid; 1333227364Sadrian struct ath_txq *txq; 1334227364Sadrian int ismcast; 1335227364Sadrian const struct ieee80211_frame *wh; 1336227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1337227364Sadrian ieee80211_seq seqno; 1338227364Sadrian uint8_t type, subtype; 1339227364Sadrian 1340227364Sadrian /* 1341227364Sadrian * Determine the target hardware queue. 1342218065Sadrian * 1343227364Sadrian * For multicast frames, the txq gets overridden to be the 1344227364Sadrian * software TXQ and it's done via direct-dispatch. 1345227364Sadrian * 1346227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1347227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1348227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1349227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1350227364Sadrian * having a node TID queued to multiple hardware TXQs. 1351227364Sadrian * This may change in the future but would require some locking 1352227364Sadrian * fudgery. 1353218065Sadrian */ 1354227364Sadrian pri = ath_tx_getac(sc, m0); 1355227364Sadrian tid = ath_tx_gettid(sc, m0); 1356218065Sadrian 1357227364Sadrian txq = sc->sc_ac2q[pri]; 1358227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1359227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1360227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1361227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1362227364Sadrian 1363227364Sadrian /* A-MPDU TX */ 1364227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1365227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1366227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1367227364Sadrian 1368227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1369227364Sadrian __func__, tid, pri, is_ampdu); 1370227364Sadrian 1371227364Sadrian /* Multicast frames go onto the software multicast queue */ 1372227364Sadrian if (ismcast) 1373227364Sadrian txq = &avp->av_mcastq; 1374227364Sadrian 1375227364Sadrian if ((! is_ampdu) && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1376227364Sadrian txq = &avp->av_mcastq; 1377227364Sadrian 1378227364Sadrian /* Do the generic frame setup */ 1379227364Sadrian /* XXX should just bzero the bf_state? */ 1380227364Sadrian bf->bf_state.bfs_dobaw = 0; 1381227364Sadrian 1382227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1383227364Sadrian /* Don't do it whilst pending; the net80211 layer still assigns them */ 1384227364Sadrian /* XXX do we need locking here? */ 1385227364Sadrian if (is_ampdu_tx) { 1386227364Sadrian ATH_TXQ_LOCK(txq); 1387227364Sadrian /* 1388227364Sadrian * Always call; this function will 1389227364Sadrian * handle making sure that null data frames 1390227364Sadrian * don't get a sequence number from the current 1391227364Sadrian * TID and thus mess with the BAW. 1392227364Sadrian */ 1393227364Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1394227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1395227364Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1396227364Sadrian bf->bf_state.bfs_dobaw = 1; 1397227364Sadrian } 1398227364Sadrian ATH_TXQ_UNLOCK(txq); 1399218240Sadrian } 1400218240Sadrian 1401218065Sadrian /* 1402227364Sadrian * If needed, the sequence number has been assigned. 1403227364Sadrian * Squirrel it away somewhere easy to get to. 1404218065Sadrian */ 1405227364Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1406227364Sadrian 1407227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1408227364Sadrian if (is_ampdu_pending) 1409227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1410227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1411227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1412227364Sadrian 1413227364Sadrian /* This also sets up the DMA map */ 1414227364Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0); 1415227364Sadrian 1416227364Sadrian if (r != 0) 1417227364Sadrian return r; 1418227364Sadrian 1419227364Sadrian /* At this point m0 could have changed! */ 1420227364Sadrian m0 = bf->bf_m; 1421227364Sadrian 1422227364Sadrian#if 1 1423218065Sadrian /* 1424227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1425227364Sadrian * destination hardware queue. Don't bother software 1426227364Sadrian * queuing it. 1427218065Sadrian */ 1428227364Sadrian /* 1429227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1430227364Sadrian * destination hardware queue. Don't bother software 1431227364Sadrian * queuing it, as the TID will now be paused. 1432227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1433227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1434227364Sadrian * It queues directly to hardware because the TID is paused 1435227364Sadrian * at this point (and won't be unpaused until the BAR has 1436227364Sadrian * either been TXed successfully or max retries has been 1437227364Sadrian * reached.) 1438227364Sadrian */ 1439227364Sadrian if (txq == &avp->av_mcastq) { 1440227364Sadrian ATH_TXQ_LOCK(txq); 1441227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1442227364Sadrian ATH_TXQ_UNLOCK(txq); 1443227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1444227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1445227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 1446227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1447227364Sadrian ATH_TXQ_LOCK(txq); 1448227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1449227364Sadrian ATH_TXQ_UNLOCK(txq); 1450227364Sadrian } else { 1451227364Sadrian /* add to software queue */ 1452227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1453227364Sadrian } 1454227364Sadrian#else 1455227364Sadrian /* 1456227364Sadrian * For now, since there's no software queue, 1457227364Sadrian * direct-dispatch to the hardware. 1458227364Sadrian */ 1459227364Sadrian ATH_TXQ_LOCK(txq); 1460227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1461227364Sadrian ATH_TXQ_UNLOCK(txq); 1462227364Sadrian#endif 1463218065Sadrian 1464218065Sadrian return 0; 1465218065Sadrian} 1466218065Sadrian 1467218065Sadrianstatic int 1468218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1469218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1470218065Sadrian const struct ieee80211_bpf_params *params) 1471218065Sadrian{ 1472218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1473218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1474218065Sadrian struct ath_hal *ah = sc->sc_ah; 1475218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1476218065Sadrian int error, ismcast, ismrr; 1477218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1478227364Sadrian u_int8_t rix, txrate; 1479218065Sadrian struct ieee80211_frame *wh; 1480227364Sadrian u_int flags; 1481218065Sadrian HAL_PKT_TYPE atype; 1482218065Sadrian const HAL_RATE_TABLE *rt; 1483218065Sadrian struct ath_desc *ds; 1484218065Sadrian u_int pri; 1485227364Sadrian int o_tid = -1; 1486227364Sadrian int do_override; 1487218065Sadrian 1488218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1489218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1490218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1491218065Sadrian /* 1492218065Sadrian * Packet length must not include any 1493218065Sadrian * pad bytes; deduct them here. 1494218065Sadrian */ 1495218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1496218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1497218065Sadrian 1498227364Sadrian 1499227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1500227364Sadrian __func__, ismcast); 1501227364Sadrian 1502218154Sadrian /* Handle encryption twiddling if needed */ 1503227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1504227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1505227364Sadrian &hdrlen, &pktlen, &keyix)) { 1506218154Sadrian ath_freetx(m0); 1507218154Sadrian return EIO; 1508218154Sadrian } 1509218154Sadrian /* packet header may have moved, reset our local pointer */ 1510218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1511218065Sadrian 1512227364Sadrian /* Do the generic frame setup */ 1513227364Sadrian /* XXX should just bzero the bf_state? */ 1514227364Sadrian bf->bf_state.bfs_dobaw = 0; 1515227364Sadrian 1516218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1517218065Sadrian if (error != 0) 1518218065Sadrian return error; 1519218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1520218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1521218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1522218065Sadrian 1523218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1524218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1525218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1526218065Sadrian flags |= HAL_TXDESC_RTSENA; 1527227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1528227364Sadrian /* XXX assume 11g/11n protection? */ 1529227364Sadrian bf->bf_state.bfs_doprot = 1; 1530218065Sadrian flags |= HAL_TXDESC_CTSENA; 1531227364Sadrian } 1532218065Sadrian /* XXX leave ismcast to injector? */ 1533218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1534218065Sadrian flags |= HAL_TXDESC_NOACK; 1535218065Sadrian 1536218065Sadrian rt = sc->sc_currates; 1537218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1538218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1539218065Sadrian txrate = rt->info[rix].rateCode; 1540218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1541218065Sadrian txrate |= rt->info[rix].shortPreamble; 1542218065Sadrian sc->sc_txrix = rix; 1543218065Sadrian try0 = params->ibp_try0; 1544218065Sadrian ismrr = (params->ibp_try1 != 0); 1545218065Sadrian txantenna = params->ibp_pri >> 2; 1546218065Sadrian if (txantenna == 0) /* XXX? */ 1547218065Sadrian txantenna = sc->sc_txantenna; 1548218157Sadrian 1549227364Sadrian /* 1550227364Sadrian * Since ctsrate is fixed, store it away for later 1551227364Sadrian * use when the descriptor fields are being set. 1552227364Sadrian */ 1553227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1554227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1555218157Sadrian 1556218065Sadrian pri = params->ibp_pri & 3; 1557227364Sadrian /* Override pri if the frame isn't a QoS one */ 1558227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1559227364Sadrian pri = ath_tx_getac(sc, m0); 1560227364Sadrian 1561218065Sadrian /* 1562218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1563218065Sadrian * set the sequence number, duration, etc. 1564218065Sadrian */ 1565218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1566218065Sadrian 1567218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1568218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1569218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1570218065Sadrian 1571218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1572218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1573218065Sadrian 1574218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1575218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1576218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1577218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1578218065Sadrian if (m0->m_flags & M_FRAG) 1579218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1580218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1581218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1582218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1583218065Sadrian 1584218065Sadrian ieee80211_radiotap_tx(vap, m0); 1585218065Sadrian } 1586218065Sadrian 1587218065Sadrian /* 1588218065Sadrian * Formulate first tx descriptor with tx controls. 1589218065Sadrian */ 1590218065Sadrian ds = bf->bf_desc; 1591218065Sadrian /* XXX check return value? */ 1592227364Sadrian 1593227364Sadrian /* Store the decided rate index values away */ 1594227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1595227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1596227364Sadrian bf->bf_state.bfs_atype = atype; 1597227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1598227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1599227364Sadrian bf->bf_state.bfs_try0 = try0; 1600227364Sadrian bf->bf_state.bfs_keyix = keyix; 1601227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1602227364Sadrian bf->bf_state.bfs_flags = flags; 1603218065Sadrian bf->bf_txflags = flags; 1604227364Sadrian bf->bf_state.bfs_shpream = 1605227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1606218065Sadrian 1607227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1608227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1609227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1610227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1611218240Sadrian 1612227364Sadrian /* Blank the legacy rate array */ 1613227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1614218240Sadrian 1615227364Sadrian bf->bf_state.bfs_rc[0].rix = 1616227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1617227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1618227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1619227364Sadrian 1620227364Sadrian if (ismrr) { 1621227364Sadrian int rix; 1622227364Sadrian 1623227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1624227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1625227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1626227364Sadrian 1627227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1628227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1629227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1630227364Sadrian 1631227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1632227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1633227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1634218065Sadrian } 1635227364Sadrian /* 1636227364Sadrian * All the required rate control decisions have been made; 1637227364Sadrian * fill in the rc flags. 1638227364Sadrian */ 1639227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1640218065Sadrian 1641227364Sadrian /* NB: no buffered multicast in power save support */ 1642227364Sadrian 1643227364Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1644227364Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1645227364Sadrian 1646227364Sadrian /* Map ADDBA to the correct priority */ 1647227364Sadrian if (do_override) { 1648227364Sadrian#if 0 1649227364Sadrian device_printf(sc->sc_dev, 1650227364Sadrian "%s: overriding tid %d pri %d -> %d\n", 1651227364Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1652227364Sadrian#endif 1653227364Sadrian pri = TID_TO_WME_AC(o_tid); 1654218240Sadrian } 1655218240Sadrian 1656227364Sadrian /* 1657227364Sadrian * If we're overiding the ADDBA destination, dump directly 1658227364Sadrian * into the hardware queue, right after any pending 1659227364Sadrian * frames to that node are. 1660227364Sadrian */ 1661227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1662227364Sadrian __func__, do_override); 1663227364Sadrian 1664227364Sadrian if (do_override) { 1665227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1666227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1667227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1668227364Sadrian } else { 1669227364Sadrian /* Queue to software queue */ 1670227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1671227364Sadrian } 1672227364Sadrian 1673218065Sadrian return 0; 1674218065Sadrian} 1675218065Sadrian 1676227364Sadrian/* 1677227364Sadrian * Send a raw frame. 1678227364Sadrian * 1679227364Sadrian * This can be called by net80211. 1680227364Sadrian */ 1681218065Sadrianint 1682218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1683218065Sadrian const struct ieee80211_bpf_params *params) 1684218065Sadrian{ 1685218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1686218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1687218065Sadrian struct ath_softc *sc = ifp->if_softc; 1688218065Sadrian struct ath_buf *bf; 1689218065Sadrian int error; 1690218065Sadrian 1691218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 1692218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 1693218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 1694218065Sadrian "!running" : "invalid"); 1695218065Sadrian m_freem(m); 1696218065Sadrian error = ENETDOWN; 1697218065Sadrian goto bad; 1698218065Sadrian } 1699218065Sadrian /* 1700218065Sadrian * Grab a TX buffer and associated resources. 1701218065Sadrian */ 1702218065Sadrian bf = ath_getbuf(sc); 1703218065Sadrian if (bf == NULL) { 1704218065Sadrian sc->sc_stats.ast_tx_nobuf++; 1705218065Sadrian m_freem(m); 1706218065Sadrian error = ENOBUFS; 1707218065Sadrian goto bad; 1708218065Sadrian } 1709218065Sadrian 1710218065Sadrian if (params == NULL) { 1711218065Sadrian /* 1712218065Sadrian * Legacy path; interpret frame contents to decide 1713218065Sadrian * precisely how to send the frame. 1714218065Sadrian */ 1715218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 1716218065Sadrian error = EIO; /* XXX */ 1717218065Sadrian goto bad2; 1718218065Sadrian } 1719218065Sadrian } else { 1720218065Sadrian /* 1721218065Sadrian * Caller supplied explicit parameters to use in 1722218065Sadrian * sending the frame. 1723218065Sadrian */ 1724218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 1725218065Sadrian error = EIO; /* XXX */ 1726218065Sadrian goto bad2; 1727218065Sadrian } 1728218065Sadrian } 1729218065Sadrian sc->sc_wd_timer = 5; 1730218065Sadrian ifp->if_opackets++; 1731218065Sadrian sc->sc_stats.ast_tx_raw++; 1732218065Sadrian 1733218065Sadrian return 0; 1734218065Sadrianbad2: 1735218065Sadrian ATH_TXBUF_LOCK(sc); 1736227344Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, bf, bf_list); 1737218065Sadrian ATH_TXBUF_UNLOCK(sc); 1738218065Sadrianbad: 1739218065Sadrian ifp->if_oerrors++; 1740218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 1741218065Sadrian ieee80211_free_node(ni); 1742218065Sadrian return error; 1743218065Sadrian} 1744227364Sadrian 1745227364Sadrian/* Some helper functions */ 1746227364Sadrian 1747227364Sadrian/* 1748227364Sadrian * ADDBA (and potentially others) need to be placed in the same 1749227364Sadrian * hardware queue as the TID/node it's relating to. This is so 1750227364Sadrian * it goes out after any pending non-aggregate frames to the 1751227364Sadrian * same node/TID. 1752227364Sadrian * 1753227364Sadrian * If this isn't done, the ADDBA can go out before the frames 1754227364Sadrian * queued in hardware. Even though these frames have a sequence 1755227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 1756227364Sadrian * no frames whose sequence numbers are after the ADDBA should 1757227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 1758227364Sadrian * will simply drop them as being out of the BAW. 1759227364Sadrian * 1760227364Sadrian * The frames can't be appended to the TID software queue - it'll 1761227364Sadrian * never be sent out. So these frames have to be directly 1762227364Sadrian * dispatched to the hardware, rather than queued in software. 1763227364Sadrian * So if this function returns true, the TXQ has to be 1764227364Sadrian * overridden and it has to be directly dispatched. 1765227364Sadrian * 1766227364Sadrian * It's a dirty hack, but someone's gotta do it. 1767227364Sadrian */ 1768227364Sadrian 1769227364Sadrian/* 1770227364Sadrian * XXX doesn't belong here! 1771227364Sadrian */ 1772227364Sadrianstatic int 1773227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 1774227364Sadrian{ 1775227364Sadrian /* Type: Management frame? */ 1776227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 1777227364Sadrian IEEE80211_FC0_TYPE_MGT) 1778227364Sadrian return 0; 1779227364Sadrian 1780227364Sadrian /* Subtype: Action frame? */ 1781227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 1782227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 1783227364Sadrian return 0; 1784227364Sadrian 1785227364Sadrian return 1; 1786227364Sadrian} 1787227364Sadrian 1788227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1789227364Sadrian/* 1790227364Sadrian * Return an alternate TID for ADDBA request frames. 1791227364Sadrian * 1792227364Sadrian * Yes, this likely should be done in the net80211 layer. 1793227364Sadrian */ 1794227364Sadrianstatic int 1795227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 1796227364Sadrian struct ieee80211_node *ni, 1797227364Sadrian struct mbuf *m0, int *tid) 1798227364Sadrian{ 1799227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 1800227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 1801227364Sadrian uint8_t *frm; 1802227364Sadrian uint16_t baparamset; 1803227364Sadrian 1804227364Sadrian /* Not action frame? Bail */ 1805227364Sadrian if (! ieee80211_is_action(wh)) 1806227364Sadrian return 0; 1807227364Sadrian 1808227364Sadrian /* XXX Not needed for frames we send? */ 1809227364Sadrian#if 0 1810227364Sadrian /* Correct length? */ 1811227364Sadrian if (! ieee80211_parse_action(ni, m)) 1812227364Sadrian return 0; 1813227364Sadrian#endif 1814227364Sadrian 1815227364Sadrian /* Extract out action frame */ 1816227364Sadrian frm = (u_int8_t *)&wh[1]; 1817227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 1818227364Sadrian 1819227364Sadrian /* Not ADDBA? Bail */ 1820227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 1821227364Sadrian return 0; 1822227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 1823227364Sadrian return 0; 1824227364Sadrian 1825227364Sadrian /* Extract TID, return it */ 1826227364Sadrian baparamset = le16toh(ia->rq_baparamset); 1827227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 1828227364Sadrian 1829227364Sadrian return 1; 1830227364Sadrian} 1831227364Sadrian#undef MS 1832227364Sadrian 1833227364Sadrian/* Per-node software queue operations */ 1834227364Sadrian 1835227364Sadrian/* 1836227364Sadrian * Add the current packet to the given BAW. 1837227364Sadrian * It is assumed that the current packet 1838227364Sadrian * 1839227364Sadrian * + fits inside the BAW; 1840227364Sadrian * + already has had a sequence number allocated. 1841227364Sadrian * 1842227364Sadrian * Since the BAW status may be modified by both the ath task and 1843227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 1844227364Sadrian */ 1845227364Sadrianvoid 1846227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 1847227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 1848227364Sadrian{ 1849227364Sadrian int index, cindex; 1850227364Sadrian struct ieee80211_tx_ampdu *tap; 1851227364Sadrian 1852227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 1853227364Sadrian 1854227364Sadrian if (bf->bf_state.bfs_isretried) 1855227364Sadrian return; 1856227364Sadrian 1857227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 1858227364Sadrian 1859227364Sadrian if (bf->bf_state.bfs_addedbaw) 1860227364Sadrian device_printf(sc->sc_dev, 1861227364Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; baw head=%d tail=%d\n", 1862227364Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 1863227364Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, tid->baw_tail); 1864227364Sadrian 1865227364Sadrian /* 1866227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 1867227364Sadrian * the txa state contains the current baw start. 1868227364Sadrian */ 1869227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 1870227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 1871227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 1872227364Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d baw head=%d tail=%d\n", 1873227364Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 1874227364Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, tid->baw_tail); 1875227364Sadrian 1876227364Sadrian 1877227364Sadrian#if 0 1878227364Sadrian assert(tid->tx_buf[cindex] == NULL); 1879227364Sadrian#endif 1880227364Sadrian if (tid->tx_buf[cindex] != NULL) { 1881227364Sadrian device_printf(sc->sc_dev, 1882227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 1883227364Sadrian "head=%d, tail=%d)\n", 1884227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 1885227364Sadrian device_printf(sc->sc_dev, 1886227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 1887227364Sadrian __func__, 1888227364Sadrian tid->tx_buf[cindex], 1889227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 1890227364Sadrian bf, 1891227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 1892227364Sadrian ); 1893227364Sadrian } 1894227364Sadrian tid->tx_buf[cindex] = bf; 1895227364Sadrian 1896227364Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & (ATH_TID_MAX_BUFS - 1))) { 1897227364Sadrian tid->baw_tail = cindex; 1898227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 1899227364Sadrian } 1900227364Sadrian} 1901227364Sadrian 1902227364Sadrian/* 1903227364Sadrian * seq_start - left edge of BAW 1904227364Sadrian * seq_next - current/next sequence number to allocate 1905227364Sadrian * 1906227364Sadrian * Since the BAW status may be modified by both the ath task and 1907227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 1908227364Sadrian */ 1909227364Sadrianstatic void 1910227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 1911227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 1912227364Sadrian{ 1913227364Sadrian int index, cindex; 1914227364Sadrian struct ieee80211_tx_ampdu *tap; 1915227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 1916227364Sadrian 1917227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 1918227364Sadrian 1919227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 1920227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 1921227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 1922227364Sadrian 1923227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 1924227364Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, baw head=%d, tail=%d\n", 1925227364Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 1926227364Sadrian cindex, tid->baw_head, tid->baw_tail); 1927227364Sadrian 1928227364Sadrian /* 1929227364Sadrian * If this occurs then we have a big problem - something else 1930227364Sadrian * has slid tap->txa_start along without updating the BAW 1931227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 1932227364Sadrian * completely busted. 1933227364Sadrian * 1934227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 1935227364Sadrian * it's quite possible that a cloned buffer is making its way 1936227364Sadrian * here and causing it to fire off. Disable TDMA for now. 1937227364Sadrian */ 1938227364Sadrian if (tid->tx_buf[cindex] != bf) { 1939227364Sadrian device_printf(sc->sc_dev, 1940227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 1941227364Sadrian __func__, 1942227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 1943227364Sadrian tid->tx_buf[cindex], 1944227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 1945227364Sadrian } 1946227364Sadrian 1947227364Sadrian tid->tx_buf[cindex] = NULL; 1948227364Sadrian 1949227364Sadrian while (tid->baw_head != tid->baw_tail && !tid->tx_buf[tid->baw_head]) { 1950227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 1951227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 1952227364Sadrian } 1953227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, "%s: baw is now %d:%d, baw head=%d\n", 1954227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 1955227364Sadrian} 1956227364Sadrian 1957227364Sadrian/* 1958227364Sadrian * Mark the current node/TID as ready to TX. 1959227364Sadrian * 1960227364Sadrian * This is done to make it easy for the software scheduler to 1961227364Sadrian * find which nodes have data to send. 1962227364Sadrian * 1963227364Sadrian * The TXQ lock must be held. 1964227364Sadrian */ 1965227364Sadrianstatic void 1966227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 1967227364Sadrian{ 1968227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 1969227364Sadrian 1970227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1971227364Sadrian 1972227364Sadrian if (tid->paused) 1973227364Sadrian return; /* paused, can't schedule yet */ 1974227364Sadrian 1975227364Sadrian if (tid->sched) 1976227364Sadrian return; /* already scheduled */ 1977227364Sadrian 1978227364Sadrian tid->sched = 1; 1979227364Sadrian 1980227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 1981227364Sadrian} 1982227364Sadrian 1983227364Sadrian/* 1984227364Sadrian * Mark the current node as no longer needing to be polled for 1985227364Sadrian * TX packets. 1986227364Sadrian * 1987227364Sadrian * The TXQ lock must be held. 1988227364Sadrian */ 1989227364Sadrianstatic void 1990227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 1991227364Sadrian{ 1992227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 1993227364Sadrian 1994227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1995227364Sadrian 1996227364Sadrian if (tid->sched == 0) 1997227364Sadrian return; 1998227364Sadrian 1999227364Sadrian tid->sched = 0; 2000227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2001227364Sadrian} 2002227364Sadrian 2003227364Sadrian/* 2004227364Sadrian * Assign a sequence number manually to the given frame. 2005227364Sadrian * 2006227364Sadrian * This should only be called for A-MPDU TX frames. 2007227364Sadrian */ 2008227364Sadrianstatic ieee80211_seq 2009227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2010227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2011227364Sadrian{ 2012227364Sadrian struct ieee80211_frame *wh; 2013227364Sadrian int tid, pri; 2014227364Sadrian ieee80211_seq seqno; 2015227364Sadrian uint8_t subtype; 2016227364Sadrian 2017227364Sadrian /* TID lookup */ 2018227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2019227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2020227364Sadrian tid = WME_AC_TO_TID(pri); 2021227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2022227364Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2023227364Sadrian 2024227364Sadrian /* XXX Is it a control frame? Ignore */ 2025227364Sadrian 2026227364Sadrian /* Does the packet require a sequence number? */ 2027227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2028227364Sadrian return -1; 2029227364Sadrian 2030227364Sadrian /* 2031227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2032227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2033227364Sadrian * 2034227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2035227364Sadrian * data frame sequence number in the aggregation state updates, so 2036227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2037227364Sadrian * RX side. 2038227364Sadrian */ 2039227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2040227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2041227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2042227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2043227364Sadrian } else { 2044227364Sadrian /* Manually assign sequence number */ 2045227364Sadrian seqno = ni->ni_txseqs[tid]; 2046227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2047227364Sadrian } 2048227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2049227364Sadrian M_SEQNO_SET(m0, seqno); 2050227364Sadrian 2051227364Sadrian /* Return so caller can do something with it if needed */ 2052227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2053227364Sadrian return seqno; 2054227364Sadrian} 2055227364Sadrian 2056227364Sadrian/* 2057227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2058227364Sadrian * If the frame is out of BAW, queue. 2059227364Sadrian * Otherwise, schedule it as a single frame. 2060227364Sadrian */ 2061227364Sadrianstatic void 2062227364Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, struct ath_buf *bf) 2063227364Sadrian{ 2064227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2065227364Sadrian struct ath_txq *txq = bf->bf_state.bfs_txq; 2066227364Sadrian struct ieee80211_tx_ampdu *tap; 2067227364Sadrian 2068227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2069227364Sadrian 2070227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2071227364Sadrian 2072227364Sadrian /* paused? queue */ 2073227364Sadrian if (tid->paused) { 2074227364Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2075227364Sadrian return; 2076227364Sadrian } 2077227364Sadrian 2078227364Sadrian /* outside baw? queue */ 2079227364Sadrian if (bf->bf_state.bfs_dobaw && 2080227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2081227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2082227364Sadrian ATH_TXQ_INSERT_TAIL(tid, bf, bf_list); 2083227364Sadrian ath_tx_tid_sched(sc, tid); 2084227364Sadrian return; 2085227364Sadrian } 2086227364Sadrian 2087227364Sadrian /* Direct dispatch to hardware */ 2088227364Sadrian ath_tx_do_ratelookup(sc, bf); 2089227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2090227364Sadrian ath_tx_set_rtscts(sc, bf); 2091227364Sadrian ath_tx_setds(sc, bf); 2092227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 2093227364Sadrian ath_tx_chaindesclist(sc, bf); 2094227364Sadrian 2095227364Sadrian /* Statistics */ 2096227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2097227364Sadrian 2098227364Sadrian /* Track per-TID hardware queue depth correctly */ 2099227364Sadrian tid->hwq_depth++; 2100227364Sadrian 2101227364Sadrian /* Add to BAW */ 2102227364Sadrian if (bf->bf_state.bfs_dobaw) { 2103227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2104227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2105227364Sadrian } 2106227364Sadrian 2107227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2108227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2109227364Sadrian 2110227364Sadrian /* Hand off to hardware */ 2111227364Sadrian ath_tx_handoff(sc, txq, bf); 2112227364Sadrian} 2113227364Sadrian 2114227364Sadrian/* 2115227364Sadrian * Attempt to send the packet. 2116227364Sadrian * If the queue isn't busy, direct-dispatch. 2117227364Sadrian * If the queue is busy enough, queue the given packet on the 2118227364Sadrian * relevant software queue. 2119227364Sadrian */ 2120227364Sadrianvoid 2121227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2122227364Sadrian struct ath_buf *bf) 2123227364Sadrian{ 2124227364Sadrian struct ath_node *an = ATH_NODE(ni); 2125227364Sadrian struct ieee80211_frame *wh; 2126227364Sadrian struct ath_tid *atid; 2127227364Sadrian int pri, tid; 2128227364Sadrian struct mbuf *m0 = bf->bf_m; 2129227364Sadrian 2130227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2131227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2132227364Sadrian pri = ath_tx_getac(sc, m0); 2133227364Sadrian tid = ath_tx_gettid(sc, m0); 2134227364Sadrian atid = &an->an_tid[tid]; 2135227364Sadrian 2136227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2137227364Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2138227364Sadrian 2139227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2140227364Sadrian bf->bf_state.bfs_tid = tid; 2141227364Sadrian bf->bf_state.bfs_txq = txq; 2142227364Sadrian bf->bf_state.bfs_pri = pri; 2143227364Sadrian 2144227364Sadrian /* 2145227364Sadrian * If the hardware queue isn't busy, queue it directly. 2146227364Sadrian * If the hardware queue is busy, queue it. 2147227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2148227364Sadrian * queue it. 2149227364Sadrian */ 2150227364Sadrian ATH_TXQ_LOCK(txq); 2151227364Sadrian if (atid->paused) { 2152227364Sadrian /* TID is paused, queue */ 2153227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2154227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2155227364Sadrian /* AMPDU pending; queue */ 2156227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2157227364Sadrian /* XXX sched? */ 2158227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2159227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2160227364Sadrian if (txq->axq_depth < sc->sc_hwq_limit) 2161227364Sadrian ath_tx_xmit_aggr(sc, an, bf); 2162227364Sadrian else { 2163227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2164227364Sadrian ath_tx_tid_sched(sc, atid); 2165227364Sadrian } 2166227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2167227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2168227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2169227364Sadrian } else { 2170227364Sadrian /* Busy; queue */ 2171227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2172227364Sadrian ath_tx_tid_sched(sc, atid); 2173227364Sadrian } 2174227364Sadrian ATH_TXQ_UNLOCK(txq); 2175227364Sadrian} 2176227364Sadrian 2177227364Sadrian/* 2178227364Sadrian * Do the basic frame setup stuff that's required before the frame 2179227364Sadrian * is added to a software queue. 2180227364Sadrian * 2181227364Sadrian * All frames get mostly the same treatment and it's done once. 2182227364Sadrian * Retransmits fiddle with things like the rate control setup, 2183227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2184227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2185227364Sadrian * 2186227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2187227364Sadrian * m0 may not be valid. 2188227364Sadrian */ 2189227364Sadrian 2190227364Sadrian 2191227364Sadrian/* 2192227364Sadrian * Configure the per-TID node state. 2193227364Sadrian * 2194227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2195227364Sadrian * else to put it just yet. 2196227364Sadrian * 2197227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2198227364Sadrian */ 2199227364Sadrianvoid 2200227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2201227364Sadrian{ 2202227364Sadrian int i, j; 2203227364Sadrian struct ath_tid *atid; 2204227364Sadrian 2205227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2206227364Sadrian atid = &an->an_tid[i]; 2207227364Sadrian TAILQ_INIT(&atid->axq_q); 2208227364Sadrian atid->tid = i; 2209227364Sadrian atid->an = an; 2210227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2211227364Sadrian atid->tx_buf[j] = NULL; 2212227364Sadrian atid->baw_head = atid->baw_tail = 0; 2213227364Sadrian atid->paused = 0; 2214227364Sadrian atid->sched = 0; 2215227364Sadrian atid->hwq_depth = 0; 2216227364Sadrian atid->cleanup_inprogress = 0; 2217227364Sadrian if (i == IEEE80211_NONQOS_TID) 2218227364Sadrian atid->ac = WME_AC_BE; 2219227364Sadrian else 2220227364Sadrian atid->ac = TID_TO_WME_AC(i); 2221227364Sadrian } 2222227364Sadrian} 2223227364Sadrian 2224227364Sadrian/* 2225227364Sadrian * Pause the current TID. This stops packets from being transmitted 2226227364Sadrian * on it. 2227227364Sadrian * 2228227364Sadrian * Since this is also called from upper layers as well as the driver, 2229227364Sadrian * it will get the TID lock. 2230227364Sadrian */ 2231227364Sadrianstatic void 2232227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2233227364Sadrian{ 2234227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2235227364Sadrian tid->paused++; 2236227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2237227364Sadrian __func__, tid->paused); 2238227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2239227364Sadrian} 2240227364Sadrian 2241227364Sadrian/* 2242227364Sadrian * Unpause the current TID, and schedule it if needed. 2243227364Sadrian */ 2244227364Sadrianstatic void 2245227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2246227364Sadrian{ 2247227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2248227364Sadrian 2249227364Sadrian tid->paused--; 2250227364Sadrian 2251227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2252227364Sadrian __func__, tid->paused); 2253227364Sadrian 2254227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2255227364Sadrian return; 2256227364Sadrian } 2257227364Sadrian 2258227364Sadrian ath_tx_tid_sched(sc, tid); 2259227364Sadrian /* Punt some frames to the hardware if needed */ 2260227364Sadrian ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2261227364Sadrian} 2262227364Sadrian 2263227364Sadrian/* 2264227364Sadrian * Free any packets currently pending in the software TX queue. 2265227364Sadrian * 2266227364Sadrian * This will be called when a node is being deleted. 2267227364Sadrian * 2268227364Sadrian * It can also be called on an active node during an interface 2269227364Sadrian * reset or state transition. 2270227364Sadrian * 2271227364Sadrian * (From Linux/reference): 2272227364Sadrian * 2273227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2274227364Sadrian * sequence number(s) without setting the retry bit. The 2275227364Sadrian * alternative is to give up on these and BAR the receiver's window 2276227364Sadrian * forward. 2277227364Sadrian */ 2278227364Sadrianstatic void 2279227364Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, struct ath_tid *tid, 2280227364Sadrian ath_bufhead *bf_cq) 2281227364Sadrian{ 2282227364Sadrian struct ath_buf *bf; 2283227364Sadrian struct ieee80211_tx_ampdu *tap; 2284227364Sadrian struct ieee80211_node *ni = &an->an_node; 2285227364Sadrian int t = 0; 2286227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2287227364Sadrian 2288227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2289227364Sadrian 2290227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2291227364Sadrian 2292227364Sadrian /* Walk the queue, free frames */ 2293227364Sadrian for (;;) { 2294227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2295227364Sadrian if (bf == NULL) { 2296227364Sadrian break; 2297227364Sadrian } 2298227364Sadrian 2299227364Sadrian if (t == 0) { 2300227364Sadrian device_printf(sc->sc_dev, 2301227364Sadrian "%s: node %p: tid %d: txq_depth=%d, " 2302227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2303227364Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, baw_tail=%d " 2304227364Sadrian "txa_start=%d, ni_txseqs=%d\n", 2305227364Sadrian __func__, ni, tid->tid, txq->axq_depth, 2306227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2307227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2308227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2309227364Sadrian ni->ni_txseqs[tid->tid]); 2310227364Sadrian t = 1; 2311227364Sadrian } 2312227364Sadrian 2313227364Sadrian 2314227364Sadrian /* 2315227364Sadrian * If the current TID is running AMPDU, update 2316227364Sadrian * the BAW. 2317227364Sadrian */ 2318227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 2319227364Sadrian bf->bf_state.bfs_dobaw) { 2320227364Sadrian /* 2321227364Sadrian * Only remove the frame from the BAW if it's 2322227364Sadrian * been transmitted at least once; this means 2323227364Sadrian * the frame was in the BAW to begin with. 2324227364Sadrian */ 2325227364Sadrian if (bf->bf_state.bfs_retries > 0) { 2326227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 2327227364Sadrian bf->bf_state.bfs_dobaw = 0; 2328227364Sadrian } 2329227364Sadrian /* 2330227364Sadrian * This has become a non-fatal error now 2331227364Sadrian */ 2332227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2333227364Sadrian device_printf(sc->sc_dev, 2334227364Sadrian "%s: wasn't added: seqno %d\n", 2335227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2336227364Sadrian } 2337227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 2338227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 2339227364Sadrian } 2340227364Sadrian 2341227364Sadrian /* 2342227364Sadrian * Now that it's completed, grab the TID lock and update 2343227364Sadrian * the sequence number and BAW window. 2344227364Sadrian * Because sequence numbers have been assigned to frames 2345227364Sadrian * that haven't been sent yet, it's entirely possible 2346227364Sadrian * we'll be called with some pending frames that have not 2347227364Sadrian * been transmitted. 2348227364Sadrian * 2349227364Sadrian * The cleaner solution is to do the sequence number allocation 2350227364Sadrian * when the packet is first transmitted - and thus the "retries" 2351227364Sadrian * check above would be enough to update the BAW/seqno. 2352227364Sadrian */ 2353227364Sadrian 2354227364Sadrian /* But don't do it for non-QoS TIDs */ 2355227364Sadrian if (tap) { 2356227364Sadrian#if 0 2357227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2358227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 2359227364Sadrian __func__, an, tid->tid, tap->txa_start); 2360227364Sadrian#endif 2361227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 2362227364Sadrian tid->baw_tail = tid->baw_head; 2363227364Sadrian } 2364227364Sadrian} 2365227364Sadrian 2366227364Sadrian/* 2367227364Sadrian * Flush all software queued packets for the given node. 2368227364Sadrian * 2369227364Sadrian * This occurs when a completion handler frees the last buffer 2370227364Sadrian * for a node, and the node is thus freed. This causes the node 2371227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 2372227364Sadrian */ 2373227364Sadrianvoid 2374227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 2375227364Sadrian{ 2376227364Sadrian int tid; 2377227364Sadrian ath_bufhead bf_cq; 2378227364Sadrian struct ath_buf *bf; 2379227364Sadrian 2380227364Sadrian TAILQ_INIT(&bf_cq); 2381227364Sadrian 2382227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 2383227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2384227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 2385227364Sadrian 2386227364Sadrian /* Remove this tid from the list of active tids */ 2387227364Sadrian ATH_TXQ_LOCK(txq); 2388227364Sadrian ath_tx_tid_unsched(sc, atid); 2389227364Sadrian 2390227364Sadrian /* Free packets */ 2391227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 2392227364Sadrian ATH_TXQ_UNLOCK(txq); 2393227364Sadrian } 2394227364Sadrian 2395227364Sadrian /* Handle completed frames */ 2396227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2397227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2398227364Sadrian ath_tx_default_comp(sc, bf, 0); 2399227364Sadrian } 2400227364Sadrian} 2401227364Sadrian 2402227364Sadrian/* 2403227364Sadrian * Drain all the software TXQs currently with traffic queued. 2404227364Sadrian */ 2405227364Sadrianvoid 2406227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 2407227364Sadrian{ 2408227364Sadrian struct ath_tid *tid; 2409227364Sadrian ath_bufhead bf_cq; 2410227364Sadrian struct ath_buf *bf; 2411227364Sadrian 2412227364Sadrian TAILQ_INIT(&bf_cq); 2413227364Sadrian ATH_TXQ_LOCK(txq); 2414227364Sadrian 2415227364Sadrian /* 2416227364Sadrian * Iterate over all active tids for the given txq, 2417227364Sadrian * flushing and unsched'ing them 2418227364Sadrian */ 2419227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 2420227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 2421227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 2422227364Sadrian ath_tx_tid_unsched(sc, tid); 2423227364Sadrian } 2424227364Sadrian 2425227364Sadrian ATH_TXQ_UNLOCK(txq); 2426227364Sadrian 2427227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2428227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2429227364Sadrian ath_tx_default_comp(sc, bf, 0); 2430227364Sadrian } 2431227364Sadrian} 2432227364Sadrian 2433227364Sadrian/* 2434227364Sadrian * Handle completion of non-aggregate session frames. 2435227364Sadrian */ 2436227364Sadrianvoid 2437227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 2438227364Sadrian{ 2439227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2440227364Sadrian struct ath_node *an = ATH_NODE(ni); 2441227364Sadrian int tid = bf->bf_state.bfs_tid; 2442227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2443227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 2444227364Sadrian 2445227364Sadrian /* The TID state is protected behind the TXQ lock */ 2446227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2447227364Sadrian 2448227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 2449227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 2450227364Sadrian 2451227364Sadrian atid->hwq_depth--; 2452227364Sadrian if (atid->hwq_depth < 0) 2453227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 2454227364Sadrian __func__, atid->hwq_depth); 2455227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2456227364Sadrian 2457227364Sadrian /* 2458227364Sadrian * punt to rate control if we're not being cleaned up 2459227364Sadrian * during a hw queue drain and the frame wanted an ACK. 2460227364Sadrian */ 2461227364Sadrian if (fail == 0 && ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0)) 2462227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 2463227364Sadrian ts, bf->bf_state.bfs_pktlen, 2464227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 2465227364Sadrian 2466227364Sadrian ath_tx_default_comp(sc, bf, fail); 2467227364Sadrian} 2468227364Sadrian 2469227364Sadrian/* 2470227364Sadrian * Handle cleanup of aggregate session packets that aren't 2471227364Sadrian * an A-MPDU. 2472227364Sadrian * 2473227364Sadrian * There's no need to update the BAW here - the session is being 2474227364Sadrian * torn down. 2475227364Sadrian */ 2476227364Sadrianstatic void 2477227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2478227364Sadrian{ 2479227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2480227364Sadrian struct ath_node *an = ATH_NODE(ni); 2481227364Sadrian int tid = bf->bf_state.bfs_tid; 2482227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2483227364Sadrian 2484227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 2485227364Sadrian __func__, tid, atid->incomp); 2486227364Sadrian 2487227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2488227364Sadrian atid->incomp--; 2489227364Sadrian if (atid->incomp == 0) { 2490227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2491227364Sadrian "%s: TID %d: cleaned up! resume!\n", 2492227364Sadrian __func__, tid); 2493227364Sadrian atid->cleanup_inprogress = 0; 2494227364Sadrian ath_tx_tid_resume(sc, atid); 2495227364Sadrian } 2496227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2497227364Sadrian 2498227364Sadrian ath_tx_default_comp(sc, bf, 0); 2499227364Sadrian} 2500227364Sadrian 2501227364Sadrian/* 2502227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 2503227364Sadrian * unaggregated. 2504227364Sadrian * 2505227364Sadrian * - Discard all retry frames from the s/w queue. 2506227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 2507227364Sadrian * - Count the number of unacked frames, and let transmit completion 2508227364Sadrian * handle it later. 2509227364Sadrian * 2510227364Sadrian * The caller is responsible for pausing the TID. 2511227364Sadrian */ 2512227364Sadrianstatic void 2513227364Sadrianath_tx_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 2514227364Sadrian{ 2515227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2516227364Sadrian struct ieee80211_tx_ampdu *tap; 2517227364Sadrian struct ath_buf *bf, *bf_next; 2518227364Sadrian ath_bufhead bf_cq; 2519227364Sadrian 2520227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2521227364Sadrian "%s: TID %d: called\n", __func__, tid); 2522227364Sadrian 2523227364Sadrian TAILQ_INIT(&bf_cq); 2524227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2525227364Sadrian 2526227364Sadrian /* 2527227364Sadrian * Update the frames in the software TX queue: 2528227364Sadrian * 2529227364Sadrian * + Discard retry frames in the queue 2530227364Sadrian * + Fix the completion function to be non-aggregate 2531227364Sadrian */ 2532227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2533227364Sadrian while (bf) { 2534227364Sadrian if (bf->bf_state.bfs_isretried) { 2535227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 2536227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 2537227364Sadrian atid->axq_depth--; 2538227364Sadrian if (bf->bf_state.bfs_dobaw) { 2539227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2540227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2541227364Sadrian device_printf(sc->sc_dev, 2542227364Sadrian "%s: wasn't added: seqno %d\n", 2543227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2544227364Sadrian } 2545227364Sadrian bf->bf_state.bfs_dobaw = 0; 2546227364Sadrian /* 2547227364Sadrian * Call the default completion handler with "fail" just 2548227364Sadrian * so upper levels are suitably notified about this. 2549227364Sadrian */ 2550227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 2551227364Sadrian bf = bf_next; 2552227364Sadrian continue; 2553227364Sadrian } 2554227364Sadrian /* Give these the default completion handler */ 2555227364Sadrian bf->bf_comp = ath_tx_normal_comp; 2556227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 2557227364Sadrian } 2558227364Sadrian 2559227364Sadrian /* The caller is required to pause the TID */ 2560227364Sadrian#if 0 2561227364Sadrian /* Pause the TID */ 2562227364Sadrian ath_tx_tid_pause(sc, atid); 2563227364Sadrian#endif 2564227364Sadrian 2565227364Sadrian /* 2566227364Sadrian * Calculate what hardware-queued frames exist based 2567227364Sadrian * on the current BAW size. Ie, what frames have been 2568227364Sadrian * added to the TX hardware queue for this TID but 2569227364Sadrian * not yet ACKed. 2570227364Sadrian */ 2571227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 2572227364Sadrian /* Need the lock - fiddling with BAW */ 2573227364Sadrian while (atid->baw_head != atid->baw_tail) { 2574227364Sadrian if (atid->tx_buf[atid->baw_head]) { 2575227364Sadrian atid->incomp++; 2576227364Sadrian atid->cleanup_inprogress = 1; 2577227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 2578227364Sadrian } 2579227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 2580227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2581227364Sadrian } 2582227364Sadrian 2583227364Sadrian /* 2584227364Sadrian * If cleanup is required, defer TID scheduling 2585227364Sadrian * until all the HW queued packets have been 2586227364Sadrian * sent. 2587227364Sadrian */ 2588227364Sadrian if (! atid->cleanup_inprogress) 2589227364Sadrian ath_tx_tid_resume(sc, atid); 2590227364Sadrian 2591227364Sadrian if (atid->cleanup_inprogress) 2592227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2593227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 2594227364Sadrian __func__, tid, atid->incomp); 2595227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2596227364Sadrian 2597227364Sadrian /* Handle completing frames and fail them */ 2598227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2599227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2600227364Sadrian ath_tx_default_comp(sc, bf, 1); 2601227364Sadrian } 2602227364Sadrian} 2603227364Sadrian 2604227364Sadrianstatic void 2605227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 2606227364Sadrian{ 2607227364Sadrian struct ieee80211_frame *wh; 2608227364Sadrian 2609227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 2610227364Sadrian /* Only update/resync if needed */ 2611227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 2612227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 2613227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 2614227364Sadrian BUS_DMASYNC_PREWRITE); 2615227364Sadrian } 2616227364Sadrian sc->sc_stats.ast_tx_swretries++; 2617227364Sadrian bf->bf_state.bfs_isretried = 1; 2618227364Sadrian bf->bf_state.bfs_retries ++; 2619227364Sadrian} 2620227364Sadrian 2621227364Sadrianstatic struct ath_buf * 2622227364Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_buf *bf) 2623227364Sadrian{ 2624227364Sadrian struct ath_buf *nbf; 2625227364Sadrian int error; 2626227364Sadrian 2627227364Sadrian nbf = ath_buf_clone(sc, bf); 2628227364Sadrian 2629227364Sadrian#if 0 2630227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 2631227364Sadrian __func__); 2632227364Sadrian#endif 2633227364Sadrian 2634227364Sadrian if (nbf == NULL) { 2635227364Sadrian /* Failed to clone */ 2636227364Sadrian device_printf(sc->sc_dev, 2637227364Sadrian "%s: failed to clone a busy buffer\n", 2638227364Sadrian __func__); 2639227364Sadrian return NULL; 2640227364Sadrian } 2641227364Sadrian 2642227364Sadrian /* Setup the dma for the new buffer */ 2643227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 2644227364Sadrian if (error != 0) { 2645227364Sadrian device_printf(sc->sc_dev, 2646227364Sadrian "%s: failed to setup dma for clone\n", 2647227364Sadrian __func__); 2648227364Sadrian /* 2649227364Sadrian * Put this at the head of the list, not tail; 2650227364Sadrian * that way it doesn't interfere with the 2651227364Sadrian * busy buffer logic (which uses the tail of 2652227364Sadrian * the list.) 2653227364Sadrian */ 2654227364Sadrian ATH_TXBUF_LOCK(sc); 2655227364Sadrian TAILQ_INSERT_HEAD(&sc->sc_txbuf, nbf, bf_list); 2656227364Sadrian ATH_TXBUF_UNLOCK(sc); 2657227364Sadrian return NULL; 2658227364Sadrian } 2659227364Sadrian 2660227364Sadrian /* Free current buffer; return the older buffer */ 2661227364Sadrian bf->bf_m = NULL; 2662227364Sadrian bf->bf_node = NULL; 2663227364Sadrian ath_freebuf(sc, bf); 2664227364Sadrian return nbf; 2665227364Sadrian} 2666227364Sadrian 2667227364Sadrian/* 2668227364Sadrian * Handle retrying an unaggregate frame in an aggregate 2669227364Sadrian * session. 2670227364Sadrian * 2671227364Sadrian * If too many retries occur, pause the TID, wait for 2672227364Sadrian * any further retransmits (as there's no reason why 2673227364Sadrian * non-aggregate frames in an aggregate session are 2674227364Sadrian * transmitted in-order; they just have to be in-BAW) 2675227364Sadrian * and then queue a BAR. 2676227364Sadrian */ 2677227364Sadrianstatic void 2678227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2679227364Sadrian{ 2680227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2681227364Sadrian struct ath_node *an = ATH_NODE(ni); 2682227364Sadrian int tid = bf->bf_state.bfs_tid; 2683227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2684227364Sadrian struct ieee80211_tx_ampdu *tap; 2685227364Sadrian int txseq; 2686227364Sadrian 2687227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2688227364Sadrian 2689227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 2690227364Sadrian 2691227364Sadrian /* 2692227364Sadrian * If the buffer is marked as busy, we can't directly 2693227364Sadrian * reuse it. Instead, try to clone the buffer. 2694227364Sadrian * If the clone is successful, recycle the old buffer. 2695227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 2696227364Sadrian * to force the next bit of code to free the buffer 2697227364Sadrian * for us. 2698227364Sadrian */ 2699227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 2700227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 2701227364Sadrian struct ath_buf *nbf; 2702227364Sadrian nbf = ath_tx_retry_clone(sc, bf); 2703227364Sadrian if (nbf) 2704227364Sadrian /* bf has been freed at this point */ 2705227364Sadrian bf = nbf; 2706227364Sadrian else 2707227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 2708227364Sadrian } 2709227364Sadrian 2710227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 2711227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 2712227364Sadrian "%s: exceeded retries; seqno %d\n", 2713227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2714227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 2715227364Sadrian 2716227364Sadrian /* Update BAW anyway */ 2717227364Sadrian if (bf->bf_state.bfs_dobaw) { 2718227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2719227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2720227364Sadrian device_printf(sc->sc_dev, 2721227364Sadrian "%s: wasn't added: seqno %d\n", 2722227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2723227364Sadrian } 2724227364Sadrian bf->bf_state.bfs_dobaw = 0; 2725227364Sadrian 2726227364Sadrian /* Send BAR frame */ 2727227364Sadrian /* 2728227364Sadrian * This'll end up going into net80211 and back out 2729227364Sadrian * again, via ic->ic_raw_xmit(). 2730227364Sadrian */ 2731227364Sadrian txseq = tap->txa_start; 2732227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2733227364Sadrian 2734227364Sadrian device_printf(sc->sc_dev, 2735227364Sadrian "%s: TID %d: send BAR; seq %d\n", __func__, tid, txseq); 2736227364Sadrian 2737227364Sadrian /* XXX TODO: send BAR */ 2738227364Sadrian 2739227364Sadrian /* Free buffer, bf is free after this call */ 2740227364Sadrian ath_tx_default_comp(sc, bf, 0); 2741227364Sadrian return; 2742227364Sadrian } 2743227364Sadrian 2744227364Sadrian /* 2745227364Sadrian * This increments the retry counter as well as 2746227364Sadrian * sets the retry flag in the ath_buf and packet 2747227364Sadrian * body. 2748227364Sadrian */ 2749227364Sadrian ath_tx_set_retry(sc, bf); 2750227364Sadrian 2751227364Sadrian /* 2752227364Sadrian * Insert this at the head of the queue, so it's 2753227364Sadrian * retried before any current/subsequent frames. 2754227364Sadrian */ 2755227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 2756227364Sadrian ath_tx_tid_sched(sc, atid); 2757227364Sadrian 2758227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2759227364Sadrian} 2760227364Sadrian 2761227364Sadrian/* 2762227364Sadrian * Common code for aggregate excessive retry/subframe retry. 2763227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 2764227364Sadrian * buffers. 2765227364Sadrian * 2766227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 2767227364Sadrian */ 2768227364Sadrianstatic int 2769227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 2770227364Sadrian ath_bufhead *bf_q) 2771227364Sadrian{ 2772227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2773227364Sadrian struct ath_node *an = ATH_NODE(ni); 2774227364Sadrian int tid = bf->bf_state.bfs_tid; 2775227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2776227364Sadrian 2777227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 2778227364Sadrian 2779227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 2780227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 2781227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 2782227364Sadrian 2783227364Sadrian /* 2784227364Sadrian * If the buffer is marked as busy, we can't directly 2785227364Sadrian * reuse it. Instead, try to clone the buffer. 2786227364Sadrian * If the clone is successful, recycle the old buffer. 2787227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 2788227364Sadrian * to force the next bit of code to free the buffer 2789227364Sadrian * for us. 2790227364Sadrian */ 2791227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 2792227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 2793227364Sadrian struct ath_buf *nbf; 2794227364Sadrian nbf = ath_tx_retry_clone(sc, bf); 2795227364Sadrian if (nbf) 2796227364Sadrian /* bf has been freed at this point */ 2797227364Sadrian bf = nbf; 2798227364Sadrian else 2799227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 2800227364Sadrian } 2801227364Sadrian 2802227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 2803227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 2804227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 2805227364Sadrian "%s: max retries: seqno %d\n", 2806227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2807227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 2808227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2809227364Sadrian device_printf(sc->sc_dev, 2810227364Sadrian "%s: wasn't added: seqno %d\n", 2811227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2812227364Sadrian bf->bf_state.bfs_dobaw = 0; 2813227364Sadrian return 1; 2814227364Sadrian } 2815227364Sadrian 2816227364Sadrian ath_tx_set_retry(sc, bf); 2817227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 2818227364Sadrian 2819227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 2820227364Sadrian return 0; 2821227364Sadrian} 2822227364Sadrian 2823227364Sadrian/* 2824227364Sadrian * error pkt completion for an aggregate destination 2825227364Sadrian */ 2826227364Sadrianstatic void 2827227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 2828227364Sadrian struct ath_tid *tid) 2829227364Sadrian{ 2830227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 2831227364Sadrian struct ath_node *an = ATH_NODE(ni); 2832227364Sadrian struct ath_buf *bf_next, *bf; 2833227364Sadrian ath_bufhead bf_q; 2834227364Sadrian int drops = 0; 2835227364Sadrian struct ieee80211_tx_ampdu *tap; 2836227364Sadrian ath_bufhead bf_cq; 2837227364Sadrian 2838227364Sadrian TAILQ_INIT(&bf_q); 2839227364Sadrian TAILQ_INIT(&bf_cq); 2840227364Sadrian sc->sc_stats.ast_tx_aggrfail++; 2841227364Sadrian 2842227364Sadrian /* 2843227364Sadrian * Update rate control - all frames have failed. 2844227364Sadrian * 2845227364Sadrian * XXX use the length in the first frame in the series; 2846227364Sadrian * XXX just so things are consistent for now. 2847227364Sadrian */ 2848227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 2849227364Sadrian &bf_first->bf_status.ds_txstat, 2850227364Sadrian bf_first->bf_state.bfs_pktlen, 2851227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 2852227364Sadrian 2853227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2854227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2855227364Sadrian 2856227364Sadrian /* Retry all subframes */ 2857227364Sadrian bf = bf_first; 2858227364Sadrian while (bf) { 2859227364Sadrian bf_next = bf->bf_next; 2860227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 2861227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 2862227364Sadrian drops++; 2863227364Sadrian bf->bf_next = NULL; 2864227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 2865227364Sadrian } 2866227364Sadrian bf = bf_next; 2867227364Sadrian } 2868227364Sadrian 2869227364Sadrian /* Prepend all frames to the beginning of the queue */ 2870227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 2871227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 2872227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2873227364Sadrian } 2874227364Sadrian 2875227364Sadrian ath_tx_tid_sched(sc, tid); 2876227364Sadrian 2877227364Sadrian /* 2878227364Sadrian * send bar if we dropped any frames 2879227364Sadrian * 2880227364Sadrian * Keep the txq lock held for now, as we need to ensure 2881227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 2882227364Sadrian * in the ifnet TX context or raw TX context.) 2883227364Sadrian */ 2884227364Sadrian if (drops) { 2885227364Sadrian int txseq = tap->txa_start; 2886227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2887227364Sadrian device_printf(sc->sc_dev, 2888227364Sadrian "%s: TID %d: send BAR; seq %d\n", 2889227364Sadrian __func__, tid->tid, txseq); 2890227364Sadrian 2891227364Sadrian /* XXX TODO: send BAR */ 2892227364Sadrian } else { 2893227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2894227364Sadrian } 2895227364Sadrian 2896227364Sadrian /* Complete frames which errored out */ 2897227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2898227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2899227364Sadrian ath_tx_default_comp(sc, bf, 0); 2900227364Sadrian } 2901227364Sadrian} 2902227364Sadrian 2903227364Sadrian/* 2904227364Sadrian * Handle clean-up of packets from an aggregate list. 2905227364Sadrian * 2906227364Sadrian * There's no need to update the BAW here - the session is being 2907227364Sadrian * torn down. 2908227364Sadrian */ 2909227364Sadrianstatic void 2910227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 2911227364Sadrian{ 2912227364Sadrian struct ath_buf *bf, *bf_next; 2913227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 2914227364Sadrian struct ath_node *an = ATH_NODE(ni); 2915227364Sadrian int tid = bf_first->bf_state.bfs_tid; 2916227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2917227364Sadrian 2918227364Sadrian bf = bf_first; 2919227364Sadrian 2920227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2921227364Sadrian 2922227364Sadrian /* update incomp */ 2923227364Sadrian while (bf) { 2924227364Sadrian atid->incomp--; 2925227364Sadrian bf = bf->bf_next; 2926227364Sadrian } 2927227364Sadrian 2928227364Sadrian if (atid->incomp == 0) { 2929227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2930227364Sadrian "%s: TID %d: cleaned up! resume!\n", 2931227364Sadrian __func__, tid); 2932227364Sadrian atid->cleanup_inprogress = 0; 2933227364Sadrian ath_tx_tid_resume(sc, atid); 2934227364Sadrian } 2935227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2936227364Sadrian 2937227364Sadrian /* Handle frame completion */ 2938227364Sadrian while (bf) { 2939227364Sadrian bf_next = bf->bf_next; 2940227364Sadrian ath_tx_default_comp(sc, bf, 1); 2941227364Sadrian bf = bf_next; 2942227364Sadrian } 2943227364Sadrian} 2944227364Sadrian 2945227364Sadrian/* 2946227364Sadrian * Handle completion of an set of aggregate frames. 2947227364Sadrian * 2948227364Sadrian * XXX for now, simply complete each sub-frame. 2949227364Sadrian * 2950227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 2951227364Sadrian * not the last descriptor in the first frame. 2952227364Sadrian */ 2953227364Sadrianstatic void 2954227364Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, int fail) 2955227364Sadrian{ 2956227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 2957227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 2958227364Sadrian struct ath_node *an = ATH_NODE(ni); 2959227364Sadrian int tid = bf_first->bf_state.bfs_tid; 2960227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2961227364Sadrian struct ath_tx_status ts; 2962227364Sadrian struct ieee80211_tx_ampdu *tap; 2963227364Sadrian ath_bufhead bf_q; 2964227364Sadrian ath_bufhead bf_cq; 2965227364Sadrian int seq_st, tx_ok; 2966227364Sadrian int hasba, isaggr; 2967227364Sadrian uint32_t ba[2]; 2968227364Sadrian struct ath_buf *bf, *bf_next; 2969227364Sadrian int ba_index; 2970227364Sadrian int drops = 0; 2971227364Sadrian int nframes = 0, nbad = 0, nf; 2972227364Sadrian int pktlen; 2973227364Sadrian /* XXX there's too much on the stack? */ 2974227364Sadrian struct ath_rc_series rc[4]; 2975227364Sadrian int txseq; 2976227364Sadrian 2977227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 2978227364Sadrian __func__, atid->hwq_depth); 2979227364Sadrian 2980227364Sadrian /* The TID state is kept behind the TXQ lock */ 2981227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2982227364Sadrian 2983227364Sadrian atid->hwq_depth--; 2984227364Sadrian if (atid->hwq_depth < 0) 2985227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 2986227364Sadrian __func__, atid->hwq_depth); 2987227364Sadrian 2988227364Sadrian /* 2989227364Sadrian * Punt cleanup to the relevant function, not our problem now 2990227364Sadrian */ 2991227364Sadrian if (atid->cleanup_inprogress) { 2992227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2993227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 2994227364Sadrian return; 2995227364Sadrian } 2996227364Sadrian 2997227364Sadrian /* 2998227364Sadrian * Take a copy; this may be needed -after- bf_first 2999227364Sadrian * has been completed and freed. 3000227364Sadrian */ 3001227364Sadrian ts = bf_first->bf_status.ds_txstat; 3002227364Sadrian /* 3003227364Sadrian * XXX for now, use the first frame in the aggregate for 3004227364Sadrian * XXX rate control completion; it's at least consistent. 3005227364Sadrian */ 3006227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3007227364Sadrian 3008227364Sadrian /* 3009227364Sadrian * handle errors first 3010227364Sadrian */ 3011227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3012227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3013227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3014227364Sadrian return; 3015227364Sadrian } 3016227364Sadrian 3017227364Sadrian TAILQ_INIT(&bf_q); 3018227364Sadrian TAILQ_INIT(&bf_cq); 3019227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3020227364Sadrian 3021227364Sadrian /* 3022227364Sadrian * extract starting sequence and block-ack bitmap 3023227364Sadrian */ 3024227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3025227364Sadrian seq_st = ts.ts_seqnum; 3026227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3027227364Sadrian tx_ok = (ts.ts_status == 0); 3028227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3029227364Sadrian ba[0] = ts.ts_ba_low; 3030227364Sadrian ba[1] = ts.ts_ba_high; 3031227364Sadrian 3032227364Sadrian /* 3033227364Sadrian * Copy the TX completion status and the rate control 3034227364Sadrian * series from the first descriptor, as it may be freed 3035227364Sadrian * before the rate control code can get its grubby fingers 3036227364Sadrian * into things. 3037227364Sadrian */ 3038227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3039227364Sadrian 3040227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3041227364Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3042227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3043227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3044227364Sadrian 3045227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3046227364Sadrian if (tid != ts.ts_tid) { 3047227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3048227364Sadrian __func__, tid, ts.ts_tid); 3049227364Sadrian tx_ok = 0; 3050227364Sadrian } 3051227364Sadrian 3052227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3053227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3054227364Sadrian device_printf(sc->sc_dev, 3055227364Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, seq_st=%d\n", 3056227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3057227364Sadrian /* XXX TODO: schedule an interface reset */ 3058227364Sadrian } 3059227364Sadrian 3060227364Sadrian /* 3061227364Sadrian * Walk the list of frames, figure out which ones were correctly 3062227364Sadrian * sent and which weren't. 3063227364Sadrian */ 3064227364Sadrian bf = bf_first; 3065227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3066227364Sadrian 3067227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3068227364Sadrian bf_first = NULL; 3069227364Sadrian 3070227364Sadrian /* 3071227364Sadrian * Walk the list of completed frames and determine 3072227364Sadrian * which need to be completed and which need to be 3073227364Sadrian * retransmitted. 3074227364Sadrian * 3075227364Sadrian * For completed frames, the completion functions need 3076227364Sadrian * to be called at the end of this function as the last 3077227364Sadrian * node reference may free the node. 3078227364Sadrian * 3079227364Sadrian * Finally, since the TXQ lock can't be held during the 3080227364Sadrian * completion callback (to avoid lock recursion), 3081227364Sadrian * the completion calls have to be done outside of the 3082227364Sadrian * lock. 3083227364Sadrian */ 3084227364Sadrian while (bf) { 3085227364Sadrian nframes++; 3086227364Sadrian ba_index = ATH_BA_INDEX(seq_st, SEQNO(bf->bf_state.bfs_seqno)); 3087227364Sadrian bf_next = bf->bf_next; 3088227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3089227364Sadrian 3090227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3091227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3092227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3093227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3094227364Sadrian 3095227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3096227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3097227364Sadrian bf->bf_state.bfs_dobaw = 0; 3098227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3099227364Sadrian device_printf(sc->sc_dev, 3100227364Sadrian "%s: wasn't added: seqno %d\n", 3101227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3102227364Sadrian bf->bf_next = NULL; 3103227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3104227364Sadrian } else { 3105227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3106227364Sadrian drops++; 3107227364Sadrian bf->bf_next = NULL; 3108227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3109227364Sadrian } 3110227364Sadrian nbad++; 3111227364Sadrian } 3112227364Sadrian bf = bf_next; 3113227364Sadrian } 3114227364Sadrian 3115227364Sadrian /* 3116227364Sadrian * Now that the BAW updates have been done, unlock 3117227364Sadrian * 3118227364Sadrian * txseq is grabbed before the lock is released so we 3119227364Sadrian * have a consistent view of what -was- in the BAW. 3120227364Sadrian * Anything after this point will not yet have been 3121227364Sadrian * TXed. 3122227364Sadrian */ 3123227364Sadrian txseq = tap->txa_start; 3124227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3125227364Sadrian 3126227364Sadrian if (nframes != nf) 3127227364Sadrian device_printf(sc->sc_dev, 3128227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3129227364Sadrian __func__, nframes, nf); 3130227364Sadrian 3131227364Sadrian /* 3132227364Sadrian * Now we know how many frames were bad, call the rate 3133227364Sadrian * control code. 3134227364Sadrian */ 3135227364Sadrian if (fail == 0) 3136227364Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, nbad); 3137227364Sadrian 3138227364Sadrian /* 3139227364Sadrian * send bar if we dropped any frames 3140227364Sadrian */ 3141227364Sadrian if (drops) { 3142227364Sadrian device_printf(sc->sc_dev, 3143227364Sadrian "%s: TID %d: send BAR; seq %d\n", __func__, tid, txseq); 3144227364Sadrian /* XXX TODO: send BAR */ 3145227364Sadrian } 3146227364Sadrian 3147227364Sadrian /* Prepend all frames to the beginning of the queue */ 3148227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3149227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3150227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3151227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3152227364Sadrian } 3153227364Sadrian ath_tx_tid_sched(sc, atid); 3154227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3155227364Sadrian 3156227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3157227364Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3158227364Sadrian 3159227364Sadrian /* Do deferred completion */ 3160227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3161227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3162227364Sadrian ath_tx_default_comp(sc, bf, 0); 3163227364Sadrian } 3164227364Sadrian} 3165227364Sadrian 3166227364Sadrian/* 3167227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3168227364Sadrian * session. 3169227364Sadrian * 3170227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3171227364Sadrian * ath_tx_draintxq(). 3172227364Sadrian */ 3173227364Sadrianstatic void 3174227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3175227364Sadrian{ 3176227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3177227364Sadrian struct ath_node *an = ATH_NODE(ni); 3178227364Sadrian int tid = bf->bf_state.bfs_tid; 3179227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3180227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3181227364Sadrian 3182227364Sadrian /* 3183227364Sadrian * Update rate control status here, before we possibly 3184227364Sadrian * punt to retry or cleanup. 3185227364Sadrian * 3186227364Sadrian * Do it outside of the TXQ lock. 3187227364Sadrian */ 3188227364Sadrian if (fail == 0 && ((bf->bf_txflags & HAL_TXDESC_NOACK) == 0)) 3189227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3190227364Sadrian &bf->bf_status.ds_txstat, 3191227364Sadrian bf->bf_state.bfs_pktlen, 3192227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3193227364Sadrian 3194227364Sadrian /* 3195227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3196227364Sadrian * This unfortunately means that it's released and regrabbed 3197227364Sadrian * during retry and cleanup. That's rather inefficient. 3198227364Sadrian */ 3199227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3200227364Sadrian 3201227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3202227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3203227364Sadrian 3204227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: tid=%d, hwq_depth=%d\n", 3205227364Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth); 3206227364Sadrian 3207227364Sadrian atid->hwq_depth--; 3208227364Sadrian if (atid->hwq_depth < 0) 3209227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3210227364Sadrian __func__, atid->hwq_depth); 3211227364Sadrian 3212227364Sadrian /* 3213227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3214227364Sadrian * rather than handling it here. It's thus their 3215227364Sadrian * responsibility to clean up, call the completion 3216227364Sadrian * function in net80211, etc. 3217227364Sadrian */ 3218227364Sadrian if (atid->cleanup_inprogress) { 3219227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3220227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3221227364Sadrian return; 3222227364Sadrian } 3223227364Sadrian 3224227364Sadrian /* 3225227364Sadrian * Don't bother with the retry check if all frames 3226227364Sadrian * are being failed (eg during queue deletion.) 3227227364Sadrian */ 3228227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3229227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3230227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3231227364Sadrian return; 3232227364Sadrian } 3233227364Sadrian 3234227364Sadrian /* Success? Complete */ 3235227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3236227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3237227364Sadrian if (bf->bf_state.bfs_dobaw) { 3238227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3239227364Sadrian bf->bf_state.bfs_dobaw = 0; 3240227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3241227364Sadrian device_printf(sc->sc_dev, 3242227364Sadrian "%s: wasn't added: seqno %d\n", 3243227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3244227364Sadrian } 3245227364Sadrian 3246227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3247227364Sadrian 3248227364Sadrian ath_tx_default_comp(sc, bf, fail); 3249227364Sadrian /* bf is freed at this point */ 3250227364Sadrian} 3251227364Sadrian 3252227364Sadrianvoid 3253227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3254227364Sadrian{ 3255227364Sadrian if (bf->bf_state.bfs_aggr) 3256227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 3257227364Sadrian else 3258227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 3259227364Sadrian} 3260227364Sadrian 3261227364Sadrian/* 3262227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3263227364Sadrian * 3264227364Sadrian * This is the aggregate version. 3265227364Sadrian */ 3266227364Sadrianvoid 3267227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 3268227364Sadrian struct ath_tid *tid) 3269227364Sadrian{ 3270227364Sadrian struct ath_buf *bf; 3271227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3272227364Sadrian struct ieee80211_tx_ampdu *tap; 3273227364Sadrian struct ieee80211_node *ni = &an->an_node; 3274227364Sadrian ATH_AGGR_STATUS status; 3275227364Sadrian ath_bufhead bf_q; 3276227364Sadrian 3277227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 3278227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3279227364Sadrian 3280227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3281227364Sadrian 3282227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 3283227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 3284227364Sadrian __func__); 3285227364Sadrian 3286227364Sadrian for (;;) { 3287227364Sadrian status = ATH_AGGR_DONE; 3288227364Sadrian 3289227364Sadrian /* 3290227364Sadrian * If the upper layer has paused the TID, don't 3291227364Sadrian * queue any further packets. 3292227364Sadrian * 3293227364Sadrian * This can also occur from the completion task because 3294227364Sadrian * of packet loss; but as its serialised with this code, 3295227364Sadrian * it won't "appear" half way through queuing packets. 3296227364Sadrian */ 3297227364Sadrian if (tid->paused) 3298227364Sadrian break; 3299227364Sadrian 3300227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3301227364Sadrian if (bf == NULL) { 3302227364Sadrian break; 3303227364Sadrian } 3304227364Sadrian 3305227364Sadrian /* 3306227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 3307227364Sadrian * data frame), schedule it directly; continue. 3308227364Sadrian */ 3309227364Sadrian if (! bf->bf_state.bfs_dobaw) { 3310227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: non-baw packet\n", 3311227364Sadrian __func__); 3312227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3313227364Sadrian bf->bf_state.bfs_aggr = 0; 3314227364Sadrian ath_tx_do_ratelookup(sc, bf); 3315227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3316227364Sadrian ath_tx_set_rtscts(sc, bf); 3317227364Sadrian ath_tx_setds(sc, bf); 3318227364Sadrian ath_tx_chaindesclist(sc, bf); 3319227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3320227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3321227364Sadrian 3322227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 3323227364Sadrian 3324227364Sadrian /* Queue the packet; continue */ 3325227364Sadrian goto queuepkt; 3326227364Sadrian } 3327227364Sadrian 3328227364Sadrian TAILQ_INIT(&bf_q); 3329227364Sadrian 3330227364Sadrian /* 3331227364Sadrian * Do a rate control lookup on the first frame in the 3332227364Sadrian * list. The rate control code needs that to occur 3333227364Sadrian * before it can determine whether to TX. 3334227364Sadrian * It's inaccurate because the rate control code doesn't 3335227364Sadrian * really "do" aggregate lookups, so it only considers 3336227364Sadrian * the size of the first frame. 3337227364Sadrian */ 3338227364Sadrian ath_tx_do_ratelookup(sc, bf); 3339227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 3340227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 3341227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3342227364Sadrian 3343227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 3344227364Sadrian 3345227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3346227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 3347227364Sadrian 3348227364Sadrian /* 3349227364Sadrian * No frames to be picked up - out of BAW 3350227364Sadrian */ 3351227364Sadrian if (TAILQ_EMPTY(&bf_q)) 3352227364Sadrian break; 3353227364Sadrian 3354227364Sadrian /* 3355227364Sadrian * This assumes that the descriptor list in the ath_bufhead 3356227364Sadrian * are already linked together via bf_next pointers. 3357227364Sadrian */ 3358227364Sadrian bf = TAILQ_FIRST(&bf_q); 3359227364Sadrian 3360227364Sadrian /* 3361227364Sadrian * If it's the only frame send as non-aggregate 3362227364Sadrian * assume that ath_tx_form_aggr() has checked 3363227364Sadrian * whether it's in the BAW and added it appropriately. 3364227364Sadrian */ 3365227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 3366227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3367227364Sadrian "%s: single-frame aggregate\n", __func__); 3368227364Sadrian bf->bf_state.bfs_aggr = 0; 3369227364Sadrian ath_tx_set_rtscts(sc, bf); 3370227364Sadrian ath_tx_setds(sc, bf); 3371227364Sadrian ath_tx_chaindesclist(sc, bf); 3372227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3373227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3374227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 3375227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 3376227364Sadrian else 3377227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 3378227364Sadrian } else { 3379227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3380227364Sadrian "%s: multi-frame aggregate: %d frames, length %d\n", 3381227364Sadrian __func__, bf->bf_state.bfs_nframes, 3382227364Sadrian bf->bf_state.bfs_al); 3383227364Sadrian bf->bf_state.bfs_aggr = 1; 3384227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 3385227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 3386227364Sadrian 3387227364Sadrian /* 3388227364Sadrian * Update the rate and rtscts information based on the 3389227364Sadrian * rate decision made by the rate control code; 3390227364Sadrian * the first frame in the aggregate needs it. 3391227364Sadrian */ 3392227364Sadrian ath_tx_set_rtscts(sc, bf); 3393227364Sadrian 3394227364Sadrian /* 3395227364Sadrian * Setup the relevant descriptor fields 3396227364Sadrian * for aggregation. The first descriptor 3397227364Sadrian * already points to the rest in the chain. 3398227364Sadrian */ 3399227364Sadrian ath_tx_setds_11n(sc, bf); 3400227364Sadrian 3401227364Sadrian /* 3402227364Sadrian * setup first desc with rate and aggr info 3403227364Sadrian */ 3404227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3405227364Sadrian } 3406227364Sadrian queuepkt: 3407227364Sadrian //txq = bf->bf_state.bfs_txq; 3408227364Sadrian 3409227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 3410227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 3411227364Sadrian 3412227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 3413227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 3414227364Sadrian 3415227364Sadrian /* Punt to txq */ 3416227364Sadrian ath_tx_handoff(sc, txq, bf); 3417227364Sadrian 3418227364Sadrian /* Track outstanding buffer count to hardware */ 3419227364Sadrian /* aggregates are "one" buffer */ 3420227364Sadrian tid->hwq_depth++; 3421227364Sadrian 3422227364Sadrian /* 3423227364Sadrian * Break out if ath_tx_form_aggr() indicated 3424227364Sadrian * there can't be any further progress (eg BAW is full.) 3425227364Sadrian * Checking for an empty txq is done above. 3426227364Sadrian * 3427227364Sadrian * XXX locking on txq here? 3428227364Sadrian */ 3429227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 3430227364Sadrian status == ATH_AGGR_BAW_CLOSED) 3431227364Sadrian break; 3432227364Sadrian } 3433227364Sadrian} 3434227364Sadrian 3435227364Sadrian/* 3436227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3437227364Sadrian */ 3438227364Sadrianvoid 3439227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 3440227364Sadrian struct ath_tid *tid) 3441227364Sadrian{ 3442227364Sadrian struct ath_buf *bf; 3443227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3444227364Sadrian struct ieee80211_node *ni = &an->an_node; 3445227364Sadrian 3446227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 3447227364Sadrian __func__, an, tid->tid); 3448227364Sadrian 3449227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3450227364Sadrian 3451227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 3452227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 3453227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 3454227364Sadrian __func__, tid->tid); 3455227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 3456227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 3457227364Sadrian __func__, tid->tid); 3458227364Sadrian 3459227364Sadrian for (;;) { 3460227364Sadrian 3461227364Sadrian /* 3462227364Sadrian * If the upper layers have paused the TID, don't 3463227364Sadrian * queue any further packets. 3464227364Sadrian */ 3465227364Sadrian if (tid->paused) 3466227364Sadrian break; 3467227364Sadrian 3468227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3469227364Sadrian if (bf == NULL) { 3470227364Sadrian break; 3471227364Sadrian } 3472227364Sadrian 3473227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3474227364Sadrian 3475227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 3476227364Sadrian 3477227364Sadrian /* Sanity check! */ 3478227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 3479227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 3480227364Sadrian " tid %d\n", 3481227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 3482227364Sadrian } 3483227364Sadrian /* Normal completion handler */ 3484227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3485227364Sadrian 3486227364Sadrian /* Program descriptors + rate control */ 3487227364Sadrian ath_tx_do_ratelookup(sc, bf); 3488227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3489227364Sadrian ath_tx_set_rtscts(sc, bf); 3490227364Sadrian ath_tx_setds(sc, bf); 3491227364Sadrian ath_tx_chaindesclist(sc, bf); 3492227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3493227364Sadrian 3494227364Sadrian /* Track outstanding buffer count to hardware */ 3495227364Sadrian /* aggregates are "one" buffer */ 3496227364Sadrian tid->hwq_depth++; 3497227364Sadrian 3498227364Sadrian /* Punt to hardware or software txq */ 3499227364Sadrian ath_tx_handoff(sc, txq, bf); 3500227364Sadrian } 3501227364Sadrian} 3502227364Sadrian 3503227364Sadrian/* 3504227364Sadrian * Schedule some packets to the given hardware queue. 3505227364Sadrian * 3506227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 3507227364Sadrian * with queued traffic) and attempts to schedule traffic 3508227364Sadrian * from them. 3509227364Sadrian * 3510227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 3511227364Sadrian * added to the end of the queue after some frames have been 3512227364Sadrian * scheduled. 3513227364Sadrian */ 3514227364Sadrianvoid 3515227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 3516227364Sadrian{ 3517227364Sadrian struct ath_tid *tid, *next, *last; 3518227364Sadrian 3519227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3520227364Sadrian 3521227364Sadrian /* 3522227364Sadrian * Don't schedule if the hardware queue is busy. 3523227364Sadrian * This (hopefully) gives some more time to aggregate 3524227364Sadrian * some packets in the aggregation queue. 3525227364Sadrian */ 3526227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 3527227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 3528227364Sadrian return; 3529227364Sadrian } 3530227364Sadrian 3531227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 3532227364Sadrian 3533227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 3534227364Sadrian /* 3535227364Sadrian * Suspend paused queues here; they'll be resumed 3536227364Sadrian * once the addba completes or times out. 3537227364Sadrian */ 3538227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 3539227364Sadrian __func__, tid->tid, tid->paused); 3540227364Sadrian ath_tx_tid_unsched(sc, tid); 3541227364Sadrian if (tid->paused) { 3542227364Sadrian continue; 3543227364Sadrian } 3544227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 3545227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 3546227364Sadrian else 3547227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 3548227364Sadrian 3549227364Sadrian /* Not empty? Re-schedule */ 3550227364Sadrian if (tid->axq_depth != 0) 3551227364Sadrian ath_tx_tid_sched(sc, tid); 3552227364Sadrian 3553227364Sadrian /* Give the software queue time to aggregate more packets */ 3554227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 3555227364Sadrian break; 3556227364Sadrian } 3557227364Sadrian 3558227364Sadrian /* 3559227364Sadrian * If this was the last entry on the original list, stop. 3560227364Sadrian * Otherwise nodes that have been rescheduled onto the end 3561227364Sadrian * of the TID FIFO list will just keep being rescheduled. 3562227364Sadrian */ 3563227364Sadrian if (tid == last) 3564227364Sadrian break; 3565227364Sadrian } 3566227364Sadrian} 3567227364Sadrian 3568227364Sadrian/* 3569227364Sadrian * TX addba handling 3570227364Sadrian */ 3571227364Sadrian 3572227364Sadrian/* 3573227364Sadrian * Return net80211 TID struct pointer, or NULL for none 3574227364Sadrian */ 3575227364Sadrianstruct ieee80211_tx_ampdu * 3576227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 3577227364Sadrian{ 3578227364Sadrian struct ieee80211_node *ni = &an->an_node; 3579227364Sadrian struct ieee80211_tx_ampdu *tap; 3580227364Sadrian int ac; 3581227364Sadrian 3582227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3583227364Sadrian return NULL; 3584227364Sadrian 3585227364Sadrian ac = TID_TO_WME_AC(tid); 3586227364Sadrian 3587227364Sadrian tap = &ni->ni_tx_ampdu[ac]; 3588227364Sadrian return tap; 3589227364Sadrian} 3590227364Sadrian 3591227364Sadrian/* 3592227364Sadrian * Is AMPDU-TX running? 3593227364Sadrian */ 3594227364Sadrianstatic int 3595227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 3596227364Sadrian{ 3597227364Sadrian struct ieee80211_tx_ampdu *tap; 3598227364Sadrian 3599227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3600227364Sadrian return 0; 3601227364Sadrian 3602227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3603227364Sadrian if (tap == NULL) 3604227364Sadrian return 0; /* Not valid; default to not running */ 3605227364Sadrian 3606227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 3607227364Sadrian} 3608227364Sadrian 3609227364Sadrian/* 3610227364Sadrian * Is AMPDU-TX negotiation pending? 3611227364Sadrian */ 3612227364Sadrianstatic int 3613227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 3614227364Sadrian{ 3615227364Sadrian struct ieee80211_tx_ampdu *tap; 3616227364Sadrian 3617227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3618227364Sadrian return 0; 3619227364Sadrian 3620227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3621227364Sadrian if (tap == NULL) 3622227364Sadrian return 0; /* Not valid; default to not pending */ 3623227364Sadrian 3624227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 3625227364Sadrian} 3626227364Sadrian 3627227364Sadrian/* 3628227364Sadrian * Is AMPDU-TX pending for the given TID? 3629227364Sadrian */ 3630227364Sadrian 3631227364Sadrian 3632227364Sadrian/* 3633227364Sadrian * Method to handle sending an ADDBA request. 3634227364Sadrian * 3635227364Sadrian * We tap this so the relevant flags can be set to pause the TID 3636227364Sadrian * whilst waiting for the response. 3637227364Sadrian * 3638227364Sadrian * XXX there's no timeout handler we can override? 3639227364Sadrian */ 3640227364Sadrianint 3641227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 3642227364Sadrian int dialogtoken, int baparamset, int batimeout) 3643227364Sadrian{ 3644227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3645227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3646227364Sadrian struct ath_node *an = ATH_NODE(ni); 3647227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3648227364Sadrian 3649227364Sadrian /* 3650227364Sadrian * XXX danger Will Robinson! 3651227364Sadrian * 3652227364Sadrian * Although the taskqueue may be running and scheduling some more 3653227364Sadrian * packets, these should all be _before_ the addba sequence number. 3654227364Sadrian * However, net80211 will keep self-assigning sequence numbers 3655227364Sadrian * until addba has been negotiated. 3656227364Sadrian * 3657227364Sadrian * In the past, these packets would be "paused" (which still works 3658227364Sadrian * fine, as they're being scheduled to the driver in the same 3659227364Sadrian * serialised method which is calling the addba request routine) 3660227364Sadrian * and when the aggregation session begins, they'll be dequeued 3661227364Sadrian * as aggregate packets and added to the BAW. However, now there's 3662227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 3663227364Sadrian * packets. Thus they never get included in the BAW tracking and 3664227364Sadrian * this can cause the initial burst of packets after the addba 3665227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 3666227364Sadrian * 3667227364Sadrian * The "eventual" solution should be to tag these packets with 3668227364Sadrian * dobaw. Although net80211 has given us a sequence number, 3669227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 3670227364Sadrian * fall within it. 3671227364Sadrian */ 3672227364Sadrian ath_tx_tid_pause(sc, atid); 3673227364Sadrian 3674227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3675227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 3676227364Sadrian __func__, dialogtoken, baparamset, batimeout); 3677227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3678227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 3679227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 3680227364Sadrian 3681227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 3682227364Sadrian batimeout); 3683227364Sadrian} 3684227364Sadrian 3685227364Sadrian/* 3686227364Sadrian * Handle an ADDBA response. 3687227364Sadrian * 3688227364Sadrian * We unpause the queue so TX'ing can resume. 3689227364Sadrian * 3690227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 3691227364Sadrian * aggregate or not) so the BAW is updated. 3692227364Sadrian * 3693227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 3694227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 3695227364Sadrian * edge won't match the ni->ni_txseq. 3696227364Sadrian * 3697227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 3698227364Sadrian * ni->ni_txseq. 3699227364Sadrian * 3700227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 3701227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 3702227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 3703227364Sadrian * window. 3704227364Sadrian */ 3705227364Sadrianint 3706227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 3707227364Sadrian int status, int code, int batimeout) 3708227364Sadrian{ 3709227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3710227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3711227364Sadrian struct ath_node *an = ATH_NODE(ni); 3712227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3713227364Sadrian int r; 3714227364Sadrian 3715227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3716227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 3717227364Sadrian status, code, batimeout); 3718227364Sadrian 3719227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3720227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 3721227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 3722227364Sadrian 3723227364Sadrian /* 3724227364Sadrian * Call this first, so the interface flags get updated 3725227364Sadrian * before the TID is unpaused. Otherwise a race condition 3726227364Sadrian * exists where the unpaused TID still doesn't yet have 3727227364Sadrian * IEEE80211_AGGR_RUNNING set. 3728227364Sadrian */ 3729227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 3730227364Sadrian 3731227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3732227364Sadrian /* 3733227364Sadrian * XXX dirty! 3734227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 3735227364Sadrian * Read above for more information. 3736227364Sadrian */ 3737227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 3738227364Sadrian ath_tx_tid_resume(sc, atid); 3739227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3740227364Sadrian return r; 3741227364Sadrian} 3742227364Sadrian 3743227364Sadrian 3744227364Sadrian/* 3745227364Sadrian * Stop ADDBA on a queue. 3746227364Sadrian */ 3747227364Sadrianvoid 3748227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 3749227364Sadrian{ 3750227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3751227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3752227364Sadrian struct ath_node *an = ATH_NODE(ni); 3753227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3754227364Sadrian 3755227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 3756227364Sadrian 3757227364Sadrian /* Pause TID traffic early, so there aren't any races */ 3758227364Sadrian ath_tx_tid_pause(sc, atid); 3759227364Sadrian 3760227364Sadrian /* There's no need to hold the TXQ lock here */ 3761227364Sadrian sc->sc_addba_stop(ni, tap); 3762227364Sadrian 3763227364Sadrian /* 3764227364Sadrian * ath_tx_cleanup will resume the TID if possible, otherwise 3765227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 3766227364Sadrian * things have been cleaned up. 3767227364Sadrian */ 3768227364Sadrian ath_tx_cleanup(sc, an, tid); 3769227364Sadrian} 3770227364Sadrian 3771227364Sadrian/* 3772227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 3773227364Sadrian * it simply tears down the aggregation session. Ew. 3774227364Sadrian * 3775227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 3776227364Sadrian * ic->ic_addba_stop(). 3777227364Sadrian * 3778227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 3779227364Sadrian * XXX BAR TX success or failure should be better handled! 3780227364Sadrian */ 3781227364Sadrianvoid 3782227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 3783227364Sadrian int status) 3784227364Sadrian{ 3785227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3786227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3787227364Sadrian struct ath_node *an = ATH_NODE(ni); 3788227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3789227364Sadrian int attempts = tap->txa_attempts; 3790227364Sadrian 3791227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3792227364Sadrian "%s: called; status=%d\n", __func__, status); 3793227364Sadrian 3794227364Sadrian /* Note: This may update the BAW details */ 3795227364Sadrian sc->sc_bar_response(ni, tap, status); 3796227364Sadrian 3797227364Sadrian /* Unpause the TID */ 3798227364Sadrian /* 3799227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 3800227364Sadrian * XXX to a non-aggregate session. So we must unpause the 3801227364Sadrian * XXX TID here or it'll never be done. 3802227364Sadrian */ 3803227364Sadrian if (status == 0 || attempts == 50) { 3804227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3805227364Sadrian ath_tx_tid_resume(sc, atid); 3806227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3807227364Sadrian } 3808227364Sadrian} 3809227364Sadrian 3810227364Sadrian/* 3811227364Sadrian * This is called whenever the pending ADDBA request times out. 3812227364Sadrian * Unpause and reschedule the TID. 3813227364Sadrian */ 3814227364Sadrianvoid 3815227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 3816227364Sadrian struct ieee80211_tx_ampdu *tap) 3817227364Sadrian{ 3818227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 3819227364Sadrian int tid = WME_AC_TO_TID(tap->txa_ac); 3820227364Sadrian struct ath_node *an = ATH_NODE(ni); 3821227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3822227364Sadrian 3823227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3824227364Sadrian "%s: called; resuming\n", __func__); 3825227364Sadrian 3826227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 3827227364Sadrian sc->sc_addba_response_timeout(ni, tap); 3828227364Sadrian 3829227364Sadrian /* Unpause the TID; which reschedules it */ 3830227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3831227364Sadrian ath_tx_tid_resume(sc, atid); 3832227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3833227364Sadrian} 3834