if_ath_tx.c revision 238710
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 238710 2012-07-23 03:52:18Z adrian $"); 32218065Sadrian 33218065Sadrian/* 34218065Sadrian * Driver for the Atheros Wireless LAN controller. 35218065Sadrian * 36218065Sadrian * This software is derived from work of Atsushi Onoe; his contribution 37218065Sadrian * is greatly appreciated. 38218065Sadrian */ 39218065Sadrian 40218065Sadrian#include "opt_inet.h" 41218065Sadrian#include "opt_ath.h" 42218065Sadrian#include "opt_wlan.h" 43218065Sadrian 44218065Sadrian#include <sys/param.h> 45218065Sadrian#include <sys/systm.h> 46218065Sadrian#include <sys/sysctl.h> 47218065Sadrian#include <sys/mbuf.h> 48218065Sadrian#include <sys/malloc.h> 49218065Sadrian#include <sys/lock.h> 50218065Sadrian#include <sys/mutex.h> 51218065Sadrian#include <sys/kernel.h> 52218065Sadrian#include <sys/socket.h> 53218065Sadrian#include <sys/sockio.h> 54218065Sadrian#include <sys/errno.h> 55218065Sadrian#include <sys/callout.h> 56218065Sadrian#include <sys/bus.h> 57218065Sadrian#include <sys/endian.h> 58218065Sadrian#include <sys/kthread.h> 59218065Sadrian#include <sys/taskqueue.h> 60218065Sadrian#include <sys/priv.h> 61218065Sadrian 62218065Sadrian#include <machine/bus.h> 63218065Sadrian 64218065Sadrian#include <net/if.h> 65218065Sadrian#include <net/if_dl.h> 66218065Sadrian#include <net/if_media.h> 67218065Sadrian#include <net/if_types.h> 68218065Sadrian#include <net/if_arp.h> 69218065Sadrian#include <net/ethernet.h> 70218065Sadrian#include <net/if_llc.h> 71218065Sadrian 72218065Sadrian#include <net80211/ieee80211_var.h> 73218065Sadrian#include <net80211/ieee80211_regdomain.h> 74218065Sadrian#ifdef IEEE80211_SUPPORT_SUPERG 75218065Sadrian#include <net80211/ieee80211_superg.h> 76218065Sadrian#endif 77218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 78218065Sadrian#include <net80211/ieee80211_tdma.h> 79218065Sadrian#endif 80227364Sadrian#include <net80211/ieee80211_ht.h> 81218065Sadrian 82218065Sadrian#include <net/bpf.h> 83218065Sadrian 84218065Sadrian#ifdef INET 85218065Sadrian#include <netinet/in.h> 86218065Sadrian#include <netinet/if_ether.h> 87218065Sadrian#endif 88218065Sadrian 89218065Sadrian#include <dev/ath/if_athvar.h> 90218065Sadrian#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */ 91218065Sadrian#include <dev/ath/ath_hal/ah_diagcodes.h> 92218065Sadrian 93218065Sadrian#include <dev/ath/if_ath_debug.h> 94218065Sadrian 95218065Sadrian#ifdef ATH_TX99_DIAG 96218065Sadrian#include <dev/ath/ath_tx99/ath_tx99.h> 97218065Sadrian#endif 98218065Sadrian 99218065Sadrian#include <dev/ath/if_ath_misc.h> 100218065Sadrian#include <dev/ath/if_ath_tx.h> 101218240Sadrian#include <dev/ath/if_ath_tx_ht.h> 102218065Sadrian 103218154Sadrian/* 104227364Sadrian * How many retries to perform in software 105227364Sadrian */ 106227364Sadrian#define SWMAX_RETRIES 10 107227364Sadrian 108227364Sadrianstatic int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, 109227364Sadrian int tid); 110227364Sadrianstatic int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, 111227364Sadrian int tid); 112236872Sadrianstatic ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc, 113236872Sadrian struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0); 114227364Sadrianstatic int ath_tx_action_frame_override_queue(struct ath_softc *sc, 115227364Sadrian struct ieee80211_node *ni, struct mbuf *m0, int *tid); 116227364Sadrian 117227364Sadrian/* 118218154Sadrian * Whether to use the 11n rate scenario functions or not 119218154Sadrian */ 120218154Sadrianstatic inline int 121218154Sadrianath_tx_is_11n(struct ath_softc *sc) 122218154Sadrian{ 123218154Sadrian return (sc->sc_ah->ah_magic == 0x20065416); 124218154Sadrian} 125218154Sadrian 126227364Sadrian/* 127227364Sadrian * Obtain the current TID from the given frame. 128227364Sadrian * 129227364Sadrian * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.) 130227364Sadrian * This has implications for which AC/priority the packet is placed 131227364Sadrian * in. 132227364Sadrian */ 133227364Sadrianstatic int 134227364Sadrianath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0) 135227364Sadrian{ 136227364Sadrian const struct ieee80211_frame *wh; 137227364Sadrian int pri = M_WME_GETAC(m0); 138227364Sadrian 139227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 140227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 141227364Sadrian return IEEE80211_NONQOS_TID; 142227364Sadrian else 143227364Sadrian return WME_AC_TO_TID(pri); 144227364Sadrian} 145227364Sadrian 146227364Sadrian/* 147227364Sadrian * Determine what the correct AC queue for the given frame 148227364Sadrian * should be. 149227364Sadrian * 150227364Sadrian * This code assumes that the TIDs map consistently to 151227364Sadrian * the underlying hardware (or software) ath_txq. 152227364Sadrian * Since the sender may try to set an AC which is 153227364Sadrian * arbitrary, non-QoS TIDs may end up being put on 154227364Sadrian * completely different ACs. There's no way to put a 155227364Sadrian * TID into multiple ath_txq's for scheduling, so 156227364Sadrian * for now we override the AC/TXQ selection and set 157227364Sadrian * non-QOS TID frames into the BE queue. 158227364Sadrian * 159227364Sadrian * This may be completely incorrect - specifically, 160227364Sadrian * some management frames may end up out of order 161227364Sadrian * compared to the QoS traffic they're controlling. 162227364Sadrian * I'll look into this later. 163227364Sadrian */ 164227364Sadrianstatic int 165227364Sadrianath_tx_getac(struct ath_softc *sc, const struct mbuf *m0) 166227364Sadrian{ 167227364Sadrian const struct ieee80211_frame *wh; 168227364Sadrian int pri = M_WME_GETAC(m0); 169227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 170227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh)) 171227364Sadrian return pri; 172227364Sadrian 173227364Sadrian return WME_AC_BE; 174227364Sadrian} 175227364Sadrian 176218065Sadrianvoid 177218065Sadrianath_txfrag_cleanup(struct ath_softc *sc, 178218065Sadrian ath_bufhead *frags, struct ieee80211_node *ni) 179218065Sadrian{ 180218065Sadrian struct ath_buf *bf, *next; 181218065Sadrian 182218065Sadrian ATH_TXBUF_LOCK_ASSERT(sc); 183218065Sadrian 184227344Sadrian TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) { 185218065Sadrian /* NB: bf assumed clean */ 186227344Sadrian TAILQ_REMOVE(frags, bf, bf_list); 187236993Sadrian ath_returnbuf_head(sc, bf); 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) { 206237000Sadrian /* XXX non-management? */ 207237000Sadrian bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL); 208218065Sadrian if (bf == NULL) { /* out of buffers, cleanup */ 209234009Sadrian device_printf(sc->sc_dev, "%s: no buffer?\n", 210234009Sadrian __func__); 211218065Sadrian ath_txfrag_cleanup(sc, frags, ni); 212218065Sadrian break; 213218065Sadrian } 214218065Sadrian ieee80211_node_incref(ni); 215227344Sadrian TAILQ_INSERT_TAIL(frags, bf, bf_list); 216218065Sadrian } 217218065Sadrian ATH_TXBUF_UNLOCK(sc); 218218065Sadrian 219227344Sadrian return !TAILQ_EMPTY(frags); 220218065Sadrian} 221218065Sadrian 222218065Sadrian/* 223218065Sadrian * Reclaim mbuf resources. For fragmented frames we 224218065Sadrian * need to claim each frag chained with m_nextpkt. 225218065Sadrian */ 226218065Sadrianvoid 227218065Sadrianath_freetx(struct mbuf *m) 228218065Sadrian{ 229218065Sadrian struct mbuf *next; 230218065Sadrian 231218065Sadrian do { 232218065Sadrian next = m->m_nextpkt; 233218065Sadrian m->m_nextpkt = NULL; 234218065Sadrian m_freem(m); 235218065Sadrian } while ((m = next) != NULL); 236218065Sadrian} 237218065Sadrian 238218065Sadrianstatic int 239218065Sadrianath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0) 240218065Sadrian{ 241218065Sadrian struct mbuf *m; 242218065Sadrian int error; 243218065Sadrian 244218065Sadrian /* 245218065Sadrian * Load the DMA map so any coalescing is done. This 246218065Sadrian * also calculates the number of descriptors we need. 247218065Sadrian */ 248218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 249218065Sadrian bf->bf_segs, &bf->bf_nseg, 250218065Sadrian BUS_DMA_NOWAIT); 251218065Sadrian if (error == EFBIG) { 252218065Sadrian /* XXX packet requires too many descriptors */ 253218065Sadrian bf->bf_nseg = ATH_TXDESC+1; 254218065Sadrian } else if (error != 0) { 255218065Sadrian sc->sc_stats.ast_tx_busdma++; 256218065Sadrian ath_freetx(m0); 257218065Sadrian return error; 258218065Sadrian } 259218065Sadrian /* 260218065Sadrian * Discard null packets and check for packets that 261218065Sadrian * require too many TX descriptors. We try to convert 262218065Sadrian * the latter to a cluster. 263218065Sadrian */ 264218065Sadrian if (bf->bf_nseg > ATH_TXDESC) { /* too many desc's, linearize */ 265218065Sadrian sc->sc_stats.ast_tx_linear++; 266218065Sadrian m = m_collapse(m0, M_DONTWAIT, ATH_TXDESC); 267218065Sadrian if (m == NULL) { 268218065Sadrian ath_freetx(m0); 269218065Sadrian sc->sc_stats.ast_tx_nombuf++; 270218065Sadrian return ENOMEM; 271218065Sadrian } 272218065Sadrian m0 = m; 273218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 274218065Sadrian bf->bf_segs, &bf->bf_nseg, 275218065Sadrian BUS_DMA_NOWAIT); 276218065Sadrian if (error != 0) { 277218065Sadrian sc->sc_stats.ast_tx_busdma++; 278218065Sadrian ath_freetx(m0); 279218065Sadrian return error; 280218065Sadrian } 281218065Sadrian KASSERT(bf->bf_nseg <= ATH_TXDESC, 282218065Sadrian ("too many segments after defrag; nseg %u", bf->bf_nseg)); 283218065Sadrian } else if (bf->bf_nseg == 0) { /* null packet, discard */ 284218065Sadrian sc->sc_stats.ast_tx_nodata++; 285218065Sadrian ath_freetx(m0); 286218065Sadrian return EIO; 287218065Sadrian } 288218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", 289218065Sadrian __func__, m0, m0->m_pkthdr.len); 290218065Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 291218065Sadrian bf->bf_m = m0; 292218065Sadrian 293218065Sadrian return 0; 294218065Sadrian} 295218065Sadrian 296227360Sadrian/* 297227360Sadrian * Chain together segments+descriptors for a non-11n frame. 298227360Sadrian */ 299218065Sadrianstatic void 300227364Sadrianath_tx_chaindesclist(struct ath_softc *sc, struct ath_buf *bf) 301218065Sadrian{ 302218065Sadrian struct ath_hal *ah = sc->sc_ah; 303218065Sadrian struct ath_desc *ds, *ds0; 304218065Sadrian int i; 305238708Sadrian /* 306238708Sadrian * XXX There's txdma and txdma_mgmt; the descriptor 307238708Sadrian * sizes must match. 308238708Sadrian */ 309238708Sadrian struct ath_descdma *dd = &sc->sc_txdma; 310218065Sadrian 311218065Sadrian /* 312218065Sadrian * Fillin the remainder of the descriptor info. 313218065Sadrian */ 314218065Sadrian ds0 = ds = bf->bf_desc; 315218065Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 316218065Sadrian ds->ds_data = bf->bf_segs[i].ds_addr; 317218065Sadrian if (i == bf->bf_nseg - 1) 318238609Sadrian ath_hal_settxdesclink(ah, ds, 0); 319218065Sadrian else 320238609Sadrian ath_hal_settxdesclink(ah, ds, 321238708Sadrian bf->bf_daddr + dd->dd_descsize * (i + 1)); 322218065Sadrian ath_hal_filltxdesc(ah, ds 323218065Sadrian , bf->bf_segs[i].ds_len /* segment length */ 324218065Sadrian , i == 0 /* first segment */ 325218065Sadrian , i == bf->bf_nseg - 1 /* last segment */ 326218065Sadrian , ds0 /* first descriptor */ 327218065Sadrian ); 328218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 329218065Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 330218065Sadrian __func__, i, ds->ds_link, ds->ds_data, 331218065Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 332227360Sadrian bf->bf_lastds = ds; 333218065Sadrian } 334233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 335218154Sadrian} 336218154Sadrian 337227364Sadrian/* 338227364Sadrian * Fill in the descriptor list for a aggregate subframe. 339227364Sadrian * 340227364Sadrian * The subframe is returned with the ds_link field in the last subframe 341227364Sadrian * pointing to 0. 342227364Sadrian */ 343218154Sadrianstatic void 344227364Sadrianath_tx_chaindesclist_subframe(struct ath_softc *sc, struct ath_buf *bf) 345218154Sadrian{ 346218154Sadrian struct ath_hal *ah = sc->sc_ah; 347227364Sadrian struct ath_desc *ds, *ds0; 348227364Sadrian int i; 349238708Sadrian /* 350238708Sadrian * XXX There's txdma and txdma_mgmt; the descriptor 351238708Sadrian * sizes must match. 352238708Sadrian */ 353238708Sadrian struct ath_descdma *dd = &sc->sc_txdma; 354218154Sadrian 355227364Sadrian ds0 = ds = bf->bf_desc; 356218154Sadrian 357218065Sadrian /* 358227364Sadrian * There's no need to call ath_hal_setupfirsttxdesc here; 359227364Sadrian * That's only going to occur for the first frame in an aggregate. 360227364Sadrian */ 361227364Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 362227364Sadrian ds->ds_data = bf->bf_segs[i].ds_addr; 363227364Sadrian if (i == bf->bf_nseg - 1) 364238609Sadrian ath_hal_settxdesclink(ah, ds, 0); 365227364Sadrian else 366238609Sadrian ath_hal_settxdesclink(ah, ds, 367238708Sadrian bf->bf_daddr + dd->dd_descsize * (i + 1)); 368227364Sadrian 369227364Sadrian /* 370227364Sadrian * This performs the setup for an aggregate frame. 371227364Sadrian * This includes enabling the aggregate flags if needed. 372227364Sadrian */ 373227364Sadrian ath_hal_chaintxdesc(ah, ds, 374227364Sadrian bf->bf_state.bfs_pktlen, 375227364Sadrian bf->bf_state.bfs_hdrlen, 376227364Sadrian HAL_PKT_TYPE_AMPDU, /* forces aggregate bits to be set */ 377227364Sadrian bf->bf_state.bfs_keyix, 378227364Sadrian 0, /* cipher, calculated from keyix */ 379227364Sadrian bf->bf_state.bfs_ndelim, 380227364Sadrian bf->bf_segs[i].ds_len, /* segment length */ 381227364Sadrian i == 0, /* first segment */ 382233895Sadrian i == bf->bf_nseg - 1, /* last segment */ 383233895Sadrian bf->bf_next == NULL /* last sub-frame in aggr */ 384227364Sadrian ); 385227364Sadrian 386227364Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 387227364Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 388227364Sadrian __func__, i, ds->ds_link, ds->ds_data, 389227364Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 390227364Sadrian bf->bf_lastds = ds; 391233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 392233990Sadrian BUS_DMASYNC_PREWRITE); 393227364Sadrian } 394227364Sadrian} 395227364Sadrian 396227364Sadrian/* 397227364Sadrian * Setup segments+descriptors for an 11n aggregate. 398227364Sadrian * bf_first is the first buffer in the aggregate. 399227364Sadrian * The descriptor list must already been linked together using 400227364Sadrian * bf->bf_next. 401227364Sadrian */ 402227364Sadrianstatic void 403227364Sadrianath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first) 404227364Sadrian{ 405227364Sadrian struct ath_buf *bf, *bf_prev = NULL; 406227364Sadrian 407227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n", 408227364Sadrian __func__, bf_first->bf_state.bfs_nframes, 409227364Sadrian bf_first->bf_state.bfs_al); 410227364Sadrian 411227364Sadrian /* 412227364Sadrian * Setup all descriptors of all subframes. 413227364Sadrian */ 414227364Sadrian bf = bf_first; 415227364Sadrian while (bf != NULL) { 416227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 417227364Sadrian "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n", 418227364Sadrian __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen, 419227364Sadrian SEQNO(bf->bf_state.bfs_seqno)); 420227364Sadrian 421227364Sadrian /* Sub-frame setup */ 422227364Sadrian ath_tx_chaindesclist_subframe(sc, bf); 423227364Sadrian 424227364Sadrian /* 425227364Sadrian * Link the last descriptor of the previous frame 426227364Sadrian * to the beginning descriptor of this frame. 427227364Sadrian */ 428227364Sadrian if (bf_prev != NULL) 429238609Sadrian ath_hal_settxdesclink(sc->sc_ah, bf_prev->bf_lastds, 430238609Sadrian bf->bf_daddr); 431227364Sadrian 432227364Sadrian /* Save a copy so we can link the next descriptor in */ 433227364Sadrian bf_prev = bf; 434227364Sadrian bf = bf->bf_next; 435227364Sadrian } 436227364Sadrian 437227364Sadrian /* 438227364Sadrian * Setup first descriptor of first frame. 439227364Sadrian * chaintxdesc() overwrites the descriptor entries; 440227364Sadrian * setupfirsttxdesc() merges in things. 441227364Sadrian * Otherwise various fields aren't set correctly (eg flags). 442227364Sadrian */ 443227364Sadrian ath_hal_setupfirsttxdesc(sc->sc_ah, 444227364Sadrian bf_first->bf_desc, 445227364Sadrian bf_first->bf_state.bfs_al, 446233966Sadrian bf_first->bf_state.bfs_txflags | HAL_TXDESC_INTREQ, 447227364Sadrian bf_first->bf_state.bfs_txpower, 448227364Sadrian bf_first->bf_state.bfs_txrate0, 449227364Sadrian bf_first->bf_state.bfs_try0, 450227364Sadrian bf_first->bf_state.bfs_txantenna, 451227364Sadrian bf_first->bf_state.bfs_ctsrate, 452227364Sadrian bf_first->bf_state.bfs_ctsduration); 453227364Sadrian 454227364Sadrian /* 455227364Sadrian * Setup the last descriptor in the list. 456227364Sadrian * bf_prev points to the last; bf is NULL here. 457227364Sadrian */ 458229949Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_desc, 459229949Sadrian bf_first->bf_desc); 460227364Sadrian 461227364Sadrian /* 462227364Sadrian * Set the first descriptor bf_lastds field to point to 463227364Sadrian * the last descriptor in the last subframe, that's where 464227364Sadrian * the status update will occur. 465227364Sadrian */ 466227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 467227364Sadrian 468227364Sadrian /* 469227364Sadrian * And bf_last in the first descriptor points to the end of 470227364Sadrian * the aggregate list. 471227364Sadrian */ 472227364Sadrian bf_first->bf_last = bf_prev; 473227364Sadrian 474227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 475227364Sadrian} 476227364Sadrian 477227364Sadrianstatic void 478227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 479227364Sadrian struct ath_buf *bf) 480227364Sadrian{ 481227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 482227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 483227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 484227364Sadrian if (txq->axq_link != NULL) { 485227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 486227364Sadrian struct ieee80211_frame *wh; 487227364Sadrian 488227364Sadrian /* mark previous frame */ 489227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 490227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 491227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 492227364Sadrian BUS_DMASYNC_PREWRITE); 493227364Sadrian 494227364Sadrian /* link descriptor */ 495227364Sadrian *txq->axq_link = bf->bf_daddr; 496227364Sadrian } 497227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 498238609Sadrian ath_hal_gettxdesclinkptr(sc->sc_ah, bf->bf_lastds, &txq->axq_link); 499227364Sadrian} 500227364Sadrian 501227364Sadrian/* 502227364Sadrian * Hand-off packet to a hardware queue. 503227364Sadrian */ 504227364Sadrianstatic void 505229949Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, 506229949Sadrian struct ath_buf *bf) 507227364Sadrian{ 508227364Sadrian struct ath_hal *ah = sc->sc_ah; 509227364Sadrian 510227364Sadrian /* 511218065Sadrian * Insert the frame on the outbound list and pass it on 512218065Sadrian * to the hardware. Multicast frames buffered for power 513218065Sadrian * save stations and transmit from the CAB queue are stored 514218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 515218065Sadrian * the SWBA handler since frames only go out on DTIM and 516218065Sadrian * to avoid possible races. 517218065Sadrian */ 518227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 519218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 520227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 521227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 522227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 523227364Sadrian 524227651Sadrian#if 0 525227651Sadrian /* 526227651Sadrian * This causes a LOR. Find out where the PCU lock is being 527227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 528227651Sadrian * be occuring. 529227651Sadrian */ 530227651Sadrian ATH_PCU_LOCK(sc); 531227651Sadrian if (sc->sc_inreset_cnt) { 532227651Sadrian ATH_PCU_UNLOCK(sc); 533227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 534227651Sadrian "%s: called with sc_in_reset != 0\n", 535227651Sadrian __func__); 536227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 537227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 538227651Sadrian __func__, txq->axq_qnum, 539227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 540227651Sadrian txq->axq_depth); 541227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 542227651Sadrian if (bf->bf_state.bfs_aggr) 543227651Sadrian txq->axq_aggr_depth++; 544227651Sadrian /* 545227651Sadrian * There's no need to update axq_link; the hardware 546227651Sadrian * is in reset and once the reset is complete, any 547227651Sadrian * non-empty queues will simply have DMA restarted. 548227651Sadrian */ 549227651Sadrian return; 550227651Sadrian } 551227651Sadrian ATH_PCU_UNLOCK(sc); 552227651Sadrian#endif 553227651Sadrian 554227364Sadrian /* For now, so not to generate whitespace diffs */ 555227364Sadrian if (1) { 556218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 557218065Sadrian int qbusy; 558218065Sadrian 559218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 560218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 561218065Sadrian if (txq->axq_link == NULL) { 562218065Sadrian /* 563218065Sadrian * Be careful writing the address to TXDP. If 564218065Sadrian * the tx q is enabled then this write will be 565218065Sadrian * ignored. Normally this is not an issue but 566218065Sadrian * when tdma is in use and the q is beacon gated 567218065Sadrian * this race can occur. If the q is busy then 568218065Sadrian * defer the work to later--either when another 569218065Sadrian * packet comes along or when we prepare a beacon 570218065Sadrian * frame at SWBA. 571218065Sadrian */ 572218065Sadrian if (!qbusy) { 573229949Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 574229949Sadrian bf->bf_daddr); 575218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 576218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 577218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 578218065Sadrian __func__, txq->axq_qnum, 579218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 580218065Sadrian txq->axq_depth); 581218065Sadrian } else { 582218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 583218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 584218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 585218065Sadrian txq->axq_qnum); 586218065Sadrian } 587218065Sadrian } else { 588218065Sadrian *txq->axq_link = bf->bf_daddr; 589218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 590218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 591218065Sadrian txq->axq_qnum, txq->axq_link, 592229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 593229949Sadrian txq->axq_depth); 594218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 595218065Sadrian /* 596218065Sadrian * The q was busy when we previously tried 597218065Sadrian * to write the address of the first buffer 598218065Sadrian * in the chain. Since it's not busy now 599218065Sadrian * handle this chore. We are certain the 600218065Sadrian * buffer at the front is the right one since 601218065Sadrian * axq_link is NULL only when the buffer list 602218065Sadrian * is/was empty. 603218065Sadrian */ 604218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 605227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 606218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 607218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 608218065Sadrian "%s: Q%u restarted\n", __func__, 609218065Sadrian txq->axq_qnum); 610218065Sadrian } 611218065Sadrian } 612218065Sadrian#else 613218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 614218065Sadrian if (txq->axq_link == NULL) { 615218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 616218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 617218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 618218065Sadrian __func__, txq->axq_qnum, 619218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 620218065Sadrian txq->axq_depth); 621218065Sadrian } else { 622218065Sadrian *txq->axq_link = bf->bf_daddr; 623218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 624218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 625218065Sadrian txq->axq_qnum, txq->axq_link, 626229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 627229949Sadrian txq->axq_depth); 628218065Sadrian } 629218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 630227360Sadrian if (bf->bf_state.bfs_aggr) 631227360Sadrian txq->axq_aggr_depth++; 632238609Sadrian ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link); 633218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 634227364Sadrian } 635227364Sadrian} 636218065Sadrian 637227364Sadrian/* 638227364Sadrian * Restart TX DMA for the given TXQ. 639227364Sadrian * 640227364Sadrian * This must be called whether the queue is empty or not. 641227364Sadrian */ 642227364Sadrianvoid 643227364Sadrianath_txq_restart_dma(struct ath_softc *sc, struct ath_txq *txq) 644227364Sadrian{ 645227364Sadrian struct ath_hal *ah = sc->sc_ah; 646232707Sadrian struct ath_buf *bf, *bf_last; 647218065Sadrian 648227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 649227364Sadrian 650227364Sadrian /* This is always going to be cleared, empty or not */ 651227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 652227364Sadrian 653232707Sadrian /* XXX make this ATH_TXQ_FIRST */ 654227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 655232707Sadrian bf_last = ATH_TXQ_LAST(txq, axq_q_s); 656232707Sadrian 657227364Sadrian if (bf == NULL) 658227364Sadrian return; 659227364Sadrian 660227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 661238609Sadrian ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link); 662227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 663218065Sadrian} 664218065Sadrian 665227364Sadrian/* 666227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 667227364Sadrian * 668227364Sadrian * The relevant hardware txq should be locked. 669227364Sadrian */ 670227364Sadrianstatic void 671227364Sadrianath_tx_handoff(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf) 672227364Sadrian{ 673227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 674227364Sadrian 675227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 676227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 677227364Sadrian else 678227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 679227364Sadrian} 680227364Sadrian 681218154Sadrianstatic int 682218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 683229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 684229949Sadrian int *keyix) 685218154Sadrian{ 686233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 687233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 688233330Sadrian __func__, 689233330Sadrian *hdrlen, 690233330Sadrian *pktlen, 691233330Sadrian isfrag, 692233330Sadrian iswep, 693233330Sadrian m0); 694233330Sadrian 695218154Sadrian if (iswep) { 696218154Sadrian const struct ieee80211_cipher *cip; 697218154Sadrian struct ieee80211_key *k; 698218154Sadrian 699218154Sadrian /* 700218154Sadrian * Construct the 802.11 header+trailer for an encrypted 701218154Sadrian * frame. The only reason this can fail is because of an 702218154Sadrian * unknown or unsupported cipher/key type. 703218154Sadrian */ 704218154Sadrian k = ieee80211_crypto_encap(ni, m0); 705218154Sadrian if (k == NULL) { 706218154Sadrian /* 707218154Sadrian * This can happen when the key is yanked after the 708218154Sadrian * frame was queued. Just discard the frame; the 709218154Sadrian * 802.11 layer counts failures and provides 710218154Sadrian * debugging/diagnostics. 711218154Sadrian */ 712229949Sadrian return (0); 713218154Sadrian } 714218154Sadrian /* 715218154Sadrian * Adjust the packet + header lengths for the crypto 716218154Sadrian * additions and calculate the h/w key index. When 717218154Sadrian * a s/w mic is done the frame will have had any mic 718218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 719218154Sadrian * account for it. Otherwise we need to add it to the 720218154Sadrian * packet length. 721218154Sadrian */ 722218154Sadrian cip = k->wk_cipher; 723218154Sadrian (*hdrlen) += cip->ic_header; 724218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 725218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 726218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 727218154Sadrian (*pktlen) += cip->ic_miclen; 728218154Sadrian (*keyix) = k->wk_keyix; 729218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 730218154Sadrian /* 731218154Sadrian * Use station key cache slot, if assigned. 732218154Sadrian */ 733218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 734218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 735218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 736218154Sadrian } else 737218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 738218154Sadrian 739229949Sadrian return (1); 740218154Sadrian} 741218154Sadrian 742233989Sadrian/* 743233989Sadrian * Calculate whether interoperability protection is required for 744233989Sadrian * this frame. 745233989Sadrian * 746233989Sadrian * This requires the rate control information be filled in, 747233989Sadrian * as the protection requirement depends upon the current 748233989Sadrian * operating mode / PHY. 749233989Sadrian */ 750233989Sadrianstatic void 751233989Sadrianath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf) 752233989Sadrian{ 753233989Sadrian struct ieee80211_frame *wh; 754233989Sadrian uint8_t rix; 755233989Sadrian uint16_t flags; 756233989Sadrian int shortPreamble; 757233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 758233989Sadrian struct ifnet *ifp = sc->sc_ifp; 759233989Sadrian struct ieee80211com *ic = ifp->if_l2com; 760233989Sadrian 761233989Sadrian flags = bf->bf_state.bfs_txflags; 762233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 763233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 764233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 765233989Sadrian 766233989Sadrian /* 767233989Sadrian * If 802.11g protection is enabled, determine whether 768233989Sadrian * to use RTS/CTS or just CTS. Note that this is only 769233989Sadrian * done for OFDM unicast frames. 770233989Sadrian */ 771233989Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 772233989Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 773233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 774233989Sadrian bf->bf_state.bfs_doprot = 1; 775233989Sadrian /* XXX fragments must use CCK rates w/ protection */ 776233989Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 777233989Sadrian flags |= HAL_TXDESC_RTSENA; 778233989Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 779233989Sadrian flags |= HAL_TXDESC_CTSENA; 780233989Sadrian } 781233989Sadrian /* 782233989Sadrian * For frags it would be desirable to use the 783233989Sadrian * highest CCK rate for RTS/CTS. But stations 784233989Sadrian * farther away may detect it at a lower CCK rate 785233989Sadrian * so use the configured protection rate instead 786233989Sadrian * (for now). 787233989Sadrian */ 788233989Sadrian sc->sc_stats.ast_tx_protect++; 789233989Sadrian } 790233989Sadrian 791233989Sadrian /* 792233989Sadrian * If 11n protection is enabled and it's a HT frame, 793233989Sadrian * enable RTS. 794233989Sadrian * 795233989Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 796233989Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 797233989Sadrian * XXX indicates it's not a HT pure environment? 798233989Sadrian */ 799233989Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 800233989Sadrian rt->info[rix].phy == IEEE80211_T_HT && 801233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 802233989Sadrian flags |= HAL_TXDESC_RTSENA; 803233989Sadrian sc->sc_stats.ast_tx_htprotect++; 804233989Sadrian } 805233989Sadrian bf->bf_state.bfs_txflags = flags; 806233989Sadrian} 807233989Sadrian 808233989Sadrian/* 809233989Sadrian * Update the frame duration given the currently selected rate. 810233989Sadrian * 811233989Sadrian * This also updates the frame duration value, so it will require 812233989Sadrian * a DMA flush. 813233989Sadrian */ 814233989Sadrianstatic void 815233989Sadrianath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf) 816233989Sadrian{ 817233989Sadrian struct ieee80211_frame *wh; 818233989Sadrian uint8_t rix; 819233989Sadrian uint16_t flags; 820233989Sadrian int shortPreamble; 821233989Sadrian struct ath_hal *ah = sc->sc_ah; 822233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 823233989Sadrian int isfrag = bf->bf_m->m_flags & M_FRAG; 824233989Sadrian 825233989Sadrian flags = bf->bf_state.bfs_txflags; 826233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 827233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 828233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 829233989Sadrian 830233989Sadrian /* 831233989Sadrian * Calculate duration. This logically belongs in the 802.11 832233989Sadrian * layer but it lacks sufficient information to calculate it. 833233989Sadrian */ 834233989Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 835233989Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 836233989Sadrian u_int16_t dur; 837233989Sadrian if (shortPreamble) 838233989Sadrian dur = rt->info[rix].spAckDuration; 839233989Sadrian else 840233989Sadrian dur = rt->info[rix].lpAckDuration; 841233989Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 842233989Sadrian dur += dur; /* additional SIFS+ACK */ 843233989Sadrian KASSERT(bf->bf_m->m_nextpkt != NULL, ("no fragment")); 844233989Sadrian /* 845233989Sadrian * Include the size of next fragment so NAV is 846233989Sadrian * updated properly. The last fragment uses only 847233989Sadrian * the ACK duration 848233989Sadrian */ 849233989Sadrian dur += ath_hal_computetxtime(ah, rt, 850233989Sadrian bf->bf_m->m_nextpkt->m_pkthdr.len, 851233989Sadrian rix, shortPreamble); 852233989Sadrian } 853233989Sadrian if (isfrag) { 854233989Sadrian /* 855233989Sadrian * Force hardware to use computed duration for next 856233989Sadrian * fragment by disabling multi-rate retry which updates 857233989Sadrian * duration based on the multi-rate duration table. 858233989Sadrian */ 859233989Sadrian bf->bf_state.bfs_ismrr = 0; 860233989Sadrian bf->bf_state.bfs_try0 = ATH_TXMGTTRY; 861233989Sadrian /* XXX update bfs_rc[0].try? */ 862233989Sadrian } 863233989Sadrian 864233989Sadrian /* Update the duration field itself */ 865233989Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 866233989Sadrian } 867233989Sadrian} 868233989Sadrian 869218932Sadrianstatic uint8_t 870218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 871227364Sadrian int cix, int shortPreamble) 872218157Sadrian{ 873218932Sadrian uint8_t ctsrate; 874218932Sadrian 875218157Sadrian /* 876218157Sadrian * CTS transmit rate is derived from the transmit rate 877218157Sadrian * by looking in the h/w rate table. We must also factor 878218157Sadrian * in whether or not a short preamble is to be used. 879218157Sadrian */ 880218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 881218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 882218932Sadrian ctsrate = rt->info[cix].rateCode; 883218932Sadrian 884218932Sadrian /* XXX this should only matter for legacy rates */ 885218932Sadrian if (shortPreamble) 886218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 887218932Sadrian 888229949Sadrian return (ctsrate); 889218932Sadrian} 890218932Sadrian 891218932Sadrian/* 892218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 893218932Sadrian */ 894218932Sadrianstatic int 895218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 896218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 897218932Sadrian int flags) 898218932Sadrian{ 899218932Sadrian int ctsduration = 0; 900218932Sadrian 901218932Sadrian /* This mustn't be called for HT modes */ 902218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 903218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 904218932Sadrian __func__, rt->info[cix].rateCode); 905229949Sadrian return (-1); 906218932Sadrian } 907218932Sadrian 908218157Sadrian /* 909218157Sadrian * Compute the transmit duration based on the frame 910218157Sadrian * size and the size of an ACK frame. We call into the 911218157Sadrian * HAL to do the computation since it depends on the 912218157Sadrian * characteristics of the actual PHY being used. 913218157Sadrian * 914218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 915218157Sadrian * use the precalculated ACK durations. 916218157Sadrian */ 917218157Sadrian if (shortPreamble) { 918218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 919218932Sadrian ctsduration += rt->info[cix].spAckDuration; 920218932Sadrian ctsduration += ath_hal_computetxtime(ah, 921218157Sadrian rt, pktlen, rix, AH_TRUE); 922218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 923218932Sadrian ctsduration += rt->info[rix].spAckDuration; 924218157Sadrian } else { 925218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 926218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 927218932Sadrian ctsduration += ath_hal_computetxtime(ah, 928218157Sadrian rt, pktlen, rix, AH_FALSE); 929218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 930218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 931218157Sadrian } 932218932Sadrian 933229949Sadrian return (ctsduration); 934218157Sadrian} 935218157Sadrian 936227364Sadrian/* 937227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 938227364Sadrian * values. 939227364Sadrian * 940227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 941227364Sadrian * and cts duration must be re-calculated. 942227364Sadrian * 943227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 944227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 945227364Sadrian * 946227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 947227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 948227364Sadrian */ 949227364Sadrianstatic void 950227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 951218065Sadrian{ 952227364Sadrian uint16_t ctsduration = 0; 953227364Sadrian uint8_t ctsrate = 0; 954227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 955227364Sadrian uint8_t cix = 0; 956227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 957227364Sadrian 958227364Sadrian /* 959227364Sadrian * No RTS/CTS enabled? Don't bother. 960227364Sadrian */ 961233966Sadrian if ((bf->bf_state.bfs_txflags & 962227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 963227364Sadrian /* XXX is this really needed? */ 964227364Sadrian bf->bf_state.bfs_ctsrate = 0; 965227364Sadrian bf->bf_state.bfs_ctsduration = 0; 966227364Sadrian return; 967227364Sadrian } 968227364Sadrian 969227364Sadrian /* 970227364Sadrian * If protection is enabled, use the protection rix control 971227364Sadrian * rate. Otherwise use the rate0 control rate. 972227364Sadrian */ 973227364Sadrian if (bf->bf_state.bfs_doprot) 974227364Sadrian rix = sc->sc_protrix; 975227364Sadrian else 976227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 977227364Sadrian 978227364Sadrian /* 979227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 980227364Sadrian * use it. 981227364Sadrian */ 982227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 983227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 984227364Sadrian else 985227364Sadrian /* Control rate from above */ 986227364Sadrian cix = rt->info[rix].controlRate; 987227364Sadrian 988227364Sadrian /* Calculate the rtscts rate for the given cix */ 989227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 990227364Sadrian bf->bf_state.bfs_shpream); 991227364Sadrian 992227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 993227364Sadrian if (! ath_tx_is_11n(sc)) 994227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 995227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 996233966Sadrian rt, bf->bf_state.bfs_txflags); 997227364Sadrian 998227364Sadrian /* Squirrel away in ath_buf */ 999227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 1000227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 1001227364Sadrian 1002227364Sadrian /* 1003227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 1004227364Sadrian * XXX TODO: only for pre-11n NICs. 1005227364Sadrian */ 1006227364Sadrian bf->bf_state.bfs_ismrr = 0; 1007227364Sadrian bf->bf_state.bfs_try0 = 1008227364Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 1009227364Sadrian} 1010227364Sadrian 1011227364Sadrian/* 1012227364Sadrian * Setup the descriptor chain for a normal or fast-frame 1013227364Sadrian * frame. 1014227364Sadrian */ 1015227364Sadrianstatic void 1016227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 1017227364Sadrian{ 1018227364Sadrian struct ath_desc *ds = bf->bf_desc; 1019227364Sadrian struct ath_hal *ah = sc->sc_ah; 1020227364Sadrian 1021227364Sadrian ath_hal_setuptxdesc(ah, ds 1022227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 1023227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 1024227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 1025227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 1026227364Sadrian , bf->bf_state.bfs_txrate0 1027227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 1028227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 1029227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 1030233966Sadrian , bf->bf_state.bfs_txflags /* flags */ 1031227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 1032227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 1033227364Sadrian ); 1034227364Sadrian 1035227364Sadrian /* 1036227364Sadrian * This will be overriden when the descriptor chain is written. 1037227364Sadrian */ 1038227364Sadrian bf->bf_lastds = ds; 1039227364Sadrian bf->bf_last = bf; 1040227364Sadrian 1041227364Sadrian /* XXX TODO: Setup descriptor chain */ 1042227364Sadrian} 1043227364Sadrian 1044227364Sadrian/* 1045227364Sadrian * Do a rate lookup. 1046227364Sadrian * 1047227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 1048227364Sadrian * Non-data frames and raw frames don't require it. 1049227364Sadrian * 1050227364Sadrian * This populates the primary and MRR entries; MRR values are 1051227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 1052227364Sadrian * pre-11n chipsets. 1053227364Sadrian * 1054227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 1055227364Sadrian * as they may depend upon the rate chosen. 1056227364Sadrian */ 1057227364Sadrianstatic void 1058227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 1059227364Sadrian{ 1060227364Sadrian uint8_t rate, rix; 1061227364Sadrian int try0; 1062227364Sadrian 1063227364Sadrian if (! bf->bf_state.bfs_doratelookup) 1064227364Sadrian return; 1065227364Sadrian 1066227364Sadrian /* Get rid of any previous state */ 1067227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1068227364Sadrian 1069227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 1070227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 1071227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 1072227364Sadrian 1073227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 1074227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1075227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 1076227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1077227364Sadrian 1078227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 1079227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 1080227364Sadrian bf->bf_state.bfs_rc); 1081227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 1082227364Sadrian 1083227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 1084227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 1085227364Sadrian bf->bf_state.bfs_try0 = try0; 1086227364Sadrian bf->bf_state.bfs_txrate0 = rate; 1087227364Sadrian} 1088227364Sadrian 1089227364Sadrian/* 1090227364Sadrian * Set the rate control fields in the given descriptor based on 1091227364Sadrian * the bf_state fields and node state. 1092227364Sadrian * 1093227364Sadrian * The bfs fields should already be set with the relevant rate 1094227364Sadrian * control information, including whether MRR is to be enabled. 1095227364Sadrian * 1096227364Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 1097227364Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 1098227364Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 1099227364Sadrian * unconditionally for 11n chips. These require the 11n rate 1100227364Sadrian * scenario to be set if MCS rates are enabled, so it's easier 1101227364Sadrian * to just always call it. The caller can then only set rates 2, 3 1102227364Sadrian * and 4 if multi-rate retry is needed. 1103227364Sadrian */ 1104227364Sadrianstatic void 1105227364Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 1106227364Sadrian struct ath_buf *bf) 1107227364Sadrian{ 1108227364Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 1109227364Sadrian 1110227364Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 1111227364Sadrian if (! bf->bf_state.bfs_ismrr) 1112227364Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 1113227364Sadrian 1114227364Sadrian /* 1115227364Sadrian * Always call - that way a retried descriptor will 1116227364Sadrian * have the MRR fields overwritten. 1117227364Sadrian * 1118227364Sadrian * XXX TODO: see if this is really needed - setting up 1119227364Sadrian * the first descriptor should set the MRR fields to 0 1120227364Sadrian * for us anyway. 1121227364Sadrian */ 1122227364Sadrian if (ath_tx_is_11n(sc)) { 1123227364Sadrian ath_buf_set_rate(sc, ni, bf); 1124227364Sadrian } else { 1125227364Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 1126227364Sadrian , rc[1].ratecode, rc[1].tries 1127227364Sadrian , rc[2].ratecode, rc[2].tries 1128227364Sadrian , rc[3].ratecode, rc[3].tries 1129227364Sadrian ); 1130227364Sadrian } 1131227364Sadrian} 1132227364Sadrian 1133227364Sadrian/* 1134227364Sadrian * Transmit the given frame to the hardware. 1135227364Sadrian * 1136227364Sadrian * The frame must already be setup; rate control must already have 1137227364Sadrian * been done. 1138227364Sadrian * 1139227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 1140227364Sadrian * it for this long when not doing software aggregation), later on 1141227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 1142227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 1143227364Sadrian */ 1144227364Sadrianstatic void 1145227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 1146227364Sadrian struct ath_buf *bf) 1147227364Sadrian{ 1148227364Sadrian 1149227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1150227364Sadrian 1151227364Sadrian /* Setup the descriptor before handoff */ 1152227364Sadrian ath_tx_do_ratelookup(sc, bf); 1153233989Sadrian ath_tx_calc_duration(sc, bf); 1154233989Sadrian ath_tx_calc_protection(sc, bf); 1155233989Sadrian ath_tx_set_rtscts(sc, bf); 1156227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1157227364Sadrian ath_tx_setds(sc, bf); 1158227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1159227364Sadrian ath_tx_chaindesclist(sc, bf); 1160227364Sadrian 1161227364Sadrian /* Hand off to hardware */ 1162227364Sadrian ath_tx_handoff(sc, txq, bf); 1163227364Sadrian} 1164227364Sadrian 1165227364Sadrian 1166227364Sadrian 1167227364Sadrianstatic int 1168227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1169234009Sadrian struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq) 1170227364Sadrian{ 1171218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1172218065Sadrian struct ath_hal *ah = sc->sc_ah; 1173218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1174218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1175218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1176218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1177227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1178227364Sadrian u_int8_t rix = 0, txrate = 0; 1179218065Sadrian struct ath_desc *ds; 1180218065Sadrian struct ieee80211_frame *wh; 1181227364Sadrian u_int subtype, flags; 1182218065Sadrian HAL_PKT_TYPE atype; 1183218065Sadrian const HAL_RATE_TABLE *rt; 1184218065Sadrian HAL_BOOL shortPreamble; 1185218065Sadrian struct ath_node *an; 1186218065Sadrian u_int pri; 1187218065Sadrian 1188236880Sadrian /* 1189236880Sadrian * To ensure that both sequence numbers and the CCMP PN handling 1190236880Sadrian * is "correct", make sure that the relevant TID queue is locked. 1191236880Sadrian * Otherwise the CCMP PN and seqno may appear out of order, causing 1192236880Sadrian * re-ordered frames to have out of order CCMP PN's, resulting 1193236880Sadrian * in many, many frame drops. 1194236880Sadrian */ 1195236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1196236880Sadrian 1197218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1198218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1199218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1200218065Sadrian isfrag = m0->m_flags & M_FRAG; 1201218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1202218065Sadrian /* 1203218065Sadrian * Packet length must not include any 1204218065Sadrian * pad bytes; deduct them here. 1205218065Sadrian */ 1206218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1207218065Sadrian 1208218154Sadrian /* Handle encryption twiddling if needed */ 1209227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1210227364Sadrian &pktlen, &keyix)) { 1211218154Sadrian ath_freetx(m0); 1212218154Sadrian return EIO; 1213218154Sadrian } 1214218065Sadrian 1215218154Sadrian /* packet header may have moved, reset our local pointer */ 1216218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1217218065Sadrian 1218218065Sadrian pktlen += IEEE80211_CRC_LEN; 1219218065Sadrian 1220218065Sadrian /* 1221218065Sadrian * Load the DMA map so any coalescing is done. This 1222218065Sadrian * also calculates the number of descriptors we need. 1223218065Sadrian */ 1224218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1225218065Sadrian if (error != 0) 1226218065Sadrian return error; 1227218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1228218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1229218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1230218065Sadrian 1231218065Sadrian /* setup descriptors */ 1232218065Sadrian ds = bf->bf_desc; 1233218065Sadrian rt = sc->sc_currates; 1234218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1235218065Sadrian 1236218065Sadrian /* 1237218065Sadrian * NB: the 802.11 layer marks whether or not we should 1238218065Sadrian * use short preamble based on the current mode and 1239218065Sadrian * negotiated parameters. 1240218065Sadrian */ 1241218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1242218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1243218065Sadrian shortPreamble = AH_TRUE; 1244218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1245218065Sadrian } else { 1246218065Sadrian shortPreamble = AH_FALSE; 1247218065Sadrian } 1248218065Sadrian 1249218065Sadrian an = ATH_NODE(ni); 1250218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1251218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1252218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1253218065Sadrian /* XXX use txparams instead of fixed values */ 1254218065Sadrian /* 1255218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1256218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1257218065Sadrian */ 1258218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1259218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1260218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1261218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1262218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1263218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1264218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1265218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1266218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1267218065Sadrian else 1268218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1269218065Sadrian rix = an->an_mgmtrix; 1270218065Sadrian txrate = rt->info[rix].rateCode; 1271218065Sadrian if (shortPreamble) 1272218065Sadrian txrate |= rt->info[rix].shortPreamble; 1273218065Sadrian try0 = ATH_TXMGTTRY; 1274218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1275218065Sadrian break; 1276218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1277218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1278218065Sadrian rix = an->an_mgmtrix; 1279218065Sadrian txrate = rt->info[rix].rateCode; 1280218065Sadrian if (shortPreamble) 1281218065Sadrian txrate |= rt->info[rix].shortPreamble; 1282218065Sadrian try0 = ATH_TXMGTTRY; 1283218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1284218065Sadrian break; 1285218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1286218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1287218065Sadrian /* 1288218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1289218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1290218065Sadrian * the rate control module for the rate to use. 1291218065Sadrian */ 1292218065Sadrian if (ismcast) { 1293218065Sadrian rix = an->an_mcastrix; 1294218065Sadrian txrate = rt->info[rix].rateCode; 1295218065Sadrian if (shortPreamble) 1296218065Sadrian txrate |= rt->info[rix].shortPreamble; 1297218065Sadrian try0 = 1; 1298218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1299218065Sadrian /* XXX? maybe always use long preamble? */ 1300218065Sadrian rix = an->an_mgmtrix; 1301218065Sadrian txrate = rt->info[rix].rateCode; 1302218065Sadrian if (shortPreamble) 1303218065Sadrian txrate |= rt->info[rix].shortPreamble; 1304218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1305218065Sadrian } else { 1306227364Sadrian /* 1307227364Sadrian * Do rate lookup on each TX, rather than using 1308227364Sadrian * the hard-coded TX information decided here. 1309227364Sadrian */ 1310227364Sadrian ismrr = 1; 1311227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1312218065Sadrian } 1313218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1314218065Sadrian flags |= HAL_TXDESC_NOACK; 1315218065Sadrian break; 1316218065Sadrian default: 1317218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1318218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1319218065Sadrian /* XXX statistic */ 1320218065Sadrian ath_freetx(m0); 1321218065Sadrian return EIO; 1322218065Sadrian } 1323218065Sadrian 1324237041Sadrian /* 1325237041Sadrian * There are two known scenarios where the frame AC doesn't match 1326237041Sadrian * what the destination TXQ is. 1327237041Sadrian * 1328237041Sadrian * + non-QoS frames (eg management?) that the net80211 stack has 1329237041Sadrian * assigned a higher AC to, but since it's a non-QoS TID, it's 1330237041Sadrian * being thrown into TID 16. TID 16 gets the AC_BE queue. 1331237041Sadrian * It's quite possible that management frames should just be 1332237041Sadrian * direct dispatched to hardware rather than go via the software 1333237041Sadrian * queue; that should be investigated in the future. There are 1334237041Sadrian * some specific scenarios where this doesn't make sense, mostly 1335237041Sadrian * surrounding ADDBA request/response - hence why that is special 1336237041Sadrian * cased. 1337237041Sadrian * 1338237041Sadrian * + Multicast frames going into the VAP mcast queue. That shows up 1339237041Sadrian * as "TXQ 11". 1340237041Sadrian * 1341237041Sadrian * This driver should eventually support separate TID and TXQ locking, 1342237041Sadrian * allowing for arbitrary AC frames to appear on arbitrary software 1343237041Sadrian * queues, being queued to the "correct" hardware queue when needed. 1344237041Sadrian */ 1345237041Sadrian#if 0 1346235750Sadrian if (txq != sc->sc_ac2q[pri]) { 1347235750Sadrian device_printf(sc->sc_dev, 1348235750Sadrian "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n", 1349235750Sadrian __func__, 1350235750Sadrian txq, 1351235750Sadrian txq->axq_qnum, 1352235750Sadrian pri, 1353235750Sadrian sc->sc_ac2q[pri], 1354235750Sadrian sc->sc_ac2q[pri]->axq_qnum); 1355235750Sadrian } 1356237041Sadrian#endif 1357235750Sadrian 1358218065Sadrian /* 1359218065Sadrian * Calculate miscellaneous flags. 1360218065Sadrian */ 1361218065Sadrian if (ismcast) { 1362218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1363218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1364218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1365218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1366218065Sadrian sc->sc_stats.ast_tx_rts++; 1367218065Sadrian } 1368218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1369218065Sadrian sc->sc_stats.ast_tx_noack++; 1370218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1371218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1372218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1373218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1374218065Sadrian sc->sc_stats.ast_tdma_ack++; 1375218065Sadrian ath_freetx(m0); 1376218065Sadrian return EIO; 1377218065Sadrian } 1378218065Sadrian#endif 1379218065Sadrian 1380218065Sadrian /* 1381227364Sadrian * Determine if a tx interrupt should be generated for 1382227364Sadrian * this descriptor. We take a tx interrupt to reap 1383227364Sadrian * descriptors when the h/w hits an EOL condition or 1384227364Sadrian * when the descriptor is specifically marked to generate 1385227364Sadrian * an interrupt. We periodically mark descriptors in this 1386227364Sadrian * way to insure timely replenishing of the supply needed 1387227364Sadrian * for sending frames. Defering interrupts reduces system 1388227364Sadrian * load and potentially allows more concurrent work to be 1389227364Sadrian * done but if done to aggressively can cause senders to 1390227364Sadrian * backup. 1391227364Sadrian * 1392227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1393227364Sadrian * dynamically through sysctl. 1394218065Sadrian */ 1395227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1396227364Sadrian txq->axq_intrcnt = 0; 1397227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1398227364Sadrian flags |= HAL_TXDESC_INTREQ; 1399227364Sadrian txq->axq_intrcnt = 0; 1400227364Sadrian } 1401218932Sadrian 1402227364Sadrian /* This point forward is actual TX bits */ 1403218065Sadrian 1404218065Sadrian /* 1405218065Sadrian * At this point we are committed to sending the frame 1406218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1407218065Sadrian * case this frame is part of frag chain. 1408218065Sadrian */ 1409218065Sadrian m0->m_nextpkt = NULL; 1410218065Sadrian 1411218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1412218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1413218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1414218065Sadrian 1415218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1416218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1417218065Sadrian 1418218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1419218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1420218065Sadrian if (iswep) 1421218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1422218065Sadrian if (isfrag) 1423218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1424218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1425218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1426218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1427218065Sadrian 1428218065Sadrian ieee80211_radiotap_tx(vap, m0); 1429218065Sadrian } 1430218065Sadrian 1431227364Sadrian /* Blank the legacy rate array */ 1432227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1433227364Sadrian 1434218065Sadrian /* 1435227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1436227364Sadrian * the rate scenario. 1437227364Sadrian */ 1438227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1439227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1440227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1441227364Sadrian 1442227364Sadrian /* Store the decided rate index values away */ 1443227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1444227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1445227364Sadrian bf->bf_state.bfs_atype = atype; 1446227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1447227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1448227364Sadrian bf->bf_state.bfs_try0 = try0; 1449227364Sadrian bf->bf_state.bfs_keyix = keyix; 1450227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1451233966Sadrian bf->bf_state.bfs_txflags = flags; 1452227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1453227364Sadrian 1454227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1455227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1456227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1457227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1458227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1459227364Sadrian 1460227364Sadrian return 0; 1461227364Sadrian} 1462227364Sadrian 1463227364Sadrian/* 1464227364Sadrian * Direct-dispatch the current frame to the hardware. 1465227364Sadrian * 1466227364Sadrian * This can be called by the net80211 code. 1467227364Sadrian * 1468227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1469227364Sadrian * XXX aggregate scheduler so its serialised? 1470227364Sadrian */ 1471227364Sadrianint 1472227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1473227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1474227364Sadrian{ 1475227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1476227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1477232764Sadrian int r = 0; 1478227364Sadrian u_int pri; 1479227364Sadrian int tid; 1480227364Sadrian struct ath_txq *txq; 1481227364Sadrian int ismcast; 1482227364Sadrian const struct ieee80211_frame *wh; 1483227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1484236872Sadrian ieee80211_seq seqno; 1485227364Sadrian uint8_t type, subtype; 1486227364Sadrian 1487227364Sadrian /* 1488227364Sadrian * Determine the target hardware queue. 1489218065Sadrian * 1490234009Sadrian * For multicast frames, the txq gets overridden appropriately 1491234009Sadrian * depending upon the state of PS. 1492227364Sadrian * 1493227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1494227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1495227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1496227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1497227364Sadrian * having a node TID queued to multiple hardware TXQs. 1498227364Sadrian * This may change in the future but would require some locking 1499227364Sadrian * fudgery. 1500218065Sadrian */ 1501227364Sadrian pri = ath_tx_getac(sc, m0); 1502227364Sadrian tid = ath_tx_gettid(sc, m0); 1503218065Sadrian 1504227364Sadrian txq = sc->sc_ac2q[pri]; 1505227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1506227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1507227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1508227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1509227364Sadrian 1510232764Sadrian /* 1511232764Sadrian * Enforce how deep the multicast queue can grow. 1512232764Sadrian * 1513232764Sadrian * XXX duplicated in ath_raw_xmit(). 1514232764Sadrian */ 1515232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1516232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1517232764Sadrian 1518232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1519232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1520232764Sadrian r = ENOBUFS; 1521232764Sadrian } 1522232764Sadrian 1523232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1524232764Sadrian 1525232764Sadrian if (r != 0) { 1526232764Sadrian m_freem(m0); 1527232764Sadrian return r; 1528232764Sadrian } 1529232764Sadrian } 1530232764Sadrian 1531227364Sadrian /* A-MPDU TX */ 1532227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1533227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1534227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1535227364Sadrian 1536236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1537236872Sadrian __func__, tid, pri, is_ampdu); 1538227364Sadrian 1539232753Sadrian /* 1540234009Sadrian * When servicing one or more stations in power-save mode 1541234009Sadrian * (or) if there is some mcast data waiting on the mcast 1542234009Sadrian * queue (to prevent out of order delivery) multicast frames 1543234009Sadrian * must be bufferd until after the beacon. 1544234009Sadrian * 1545234009Sadrian * TODO: we should lock the mcastq before we check the length. 1546232753Sadrian */ 1547234009Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1548227364Sadrian txq = &avp->av_mcastq; 1549227364Sadrian 1550227364Sadrian /* Do the generic frame setup */ 1551227364Sadrian /* XXX should just bzero the bf_state? */ 1552227364Sadrian bf->bf_state.bfs_dobaw = 0; 1553227364Sadrian 1554236880Sadrian /* 1555236880Sadrian * Acquire the TXQ lock early, so both the encap and seqno 1556236880Sadrian * are allocated together. 1557236880Sadrian */ 1558236880Sadrian ATH_TXQ_LOCK(txq); 1559236880Sadrian 1560227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1561236880Sadrian /* 1562236880Sadrian * Don't do it whilst pending; the net80211 layer still 1563236880Sadrian * assigns them. 1564236880Sadrian */ 1565227364Sadrian if (is_ampdu_tx) { 1566227364Sadrian /* 1567227364Sadrian * Always call; this function will 1568227364Sadrian * handle making sure that null data frames 1569227364Sadrian * don't get a sequence number from the current 1570227364Sadrian * TID and thus mess with the BAW. 1571227364Sadrian */ 1572236872Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1573236874Sadrian 1574236874Sadrian /* 1575236874Sadrian * Don't add QoS NULL frames to the BAW. 1576236874Sadrian */ 1577236872Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1578236872Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1579227364Sadrian bf->bf_state.bfs_dobaw = 1; 1580227364Sadrian } 1581218240Sadrian } 1582218240Sadrian 1583218065Sadrian /* 1584227364Sadrian * If needed, the sequence number has been assigned. 1585227364Sadrian * Squirrel it away somewhere easy to get to. 1586218065Sadrian */ 1587236872Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1588227364Sadrian 1589227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1590227364Sadrian if (is_ampdu_pending) 1591227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1592227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1593227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1594227364Sadrian 1595227364Sadrian /* This also sets up the DMA map */ 1596234009Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0, txq); 1597227364Sadrian 1598227364Sadrian if (r != 0) 1599236880Sadrian goto done; 1600227364Sadrian 1601227364Sadrian /* At this point m0 could have changed! */ 1602227364Sadrian m0 = bf->bf_m; 1603227364Sadrian 1604227364Sadrian#if 1 1605218065Sadrian /* 1606227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1607227364Sadrian * destination hardware queue. Don't bother software 1608227364Sadrian * queuing it. 1609218065Sadrian */ 1610227364Sadrian /* 1611227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1612227364Sadrian * destination hardware queue. Don't bother software 1613227364Sadrian * queuing it, as the TID will now be paused. 1614227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1615227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1616227364Sadrian * It queues directly to hardware because the TID is paused 1617227364Sadrian * at this point (and won't be unpaused until the BAR has 1618227364Sadrian * either been TXed successfully or max retries has been 1619227364Sadrian * reached.) 1620227364Sadrian */ 1621227364Sadrian if (txq == &avp->av_mcastq) { 1622235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1623233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1624227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1625227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1626227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1627235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1628227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1629227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1630227364Sadrian } else { 1631227364Sadrian /* add to software queue */ 1632235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1633233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1634227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1635227364Sadrian } 1636227364Sadrian#else 1637227364Sadrian /* 1638227364Sadrian * For now, since there's no software queue, 1639227364Sadrian * direct-dispatch to the hardware. 1640227364Sadrian */ 1641227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1642236880Sadrian#endif 1643236880Sadriandone: 1644227364Sadrian ATH_TXQ_UNLOCK(txq); 1645218065Sadrian 1646218065Sadrian return 0; 1647218065Sadrian} 1648218065Sadrian 1649218065Sadrianstatic int 1650218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1651218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1652218065Sadrian const struct ieee80211_bpf_params *params) 1653218065Sadrian{ 1654218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1655218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1656218065Sadrian struct ath_hal *ah = sc->sc_ah; 1657218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1658218065Sadrian int error, ismcast, ismrr; 1659218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1660227364Sadrian u_int8_t rix, txrate; 1661218065Sadrian struct ieee80211_frame *wh; 1662227364Sadrian u_int flags; 1663218065Sadrian HAL_PKT_TYPE atype; 1664218065Sadrian const HAL_RATE_TABLE *rt; 1665218065Sadrian struct ath_desc *ds; 1666218065Sadrian u_int pri; 1667227364Sadrian int o_tid = -1; 1668227364Sadrian int do_override; 1669218065Sadrian 1670218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1671218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1672218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1673218065Sadrian /* 1674218065Sadrian * Packet length must not include any 1675218065Sadrian * pad bytes; deduct them here. 1676218065Sadrian */ 1677218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1678218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1679218065Sadrian 1680227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1681227364Sadrian __func__, ismcast); 1682227364Sadrian 1683236880Sadrian pri = params->ibp_pri & 3; 1684236880Sadrian /* Override pri if the frame isn't a QoS one */ 1685236880Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1686236880Sadrian pri = ath_tx_getac(sc, m0); 1687236880Sadrian 1688236880Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1689236880Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1690236880Sadrian 1691236880Sadrian /* Map ADDBA to the correct priority */ 1692236880Sadrian if (do_override) { 1693236880Sadrian#if 0 1694236880Sadrian device_printf(sc->sc_dev, 1695236880Sadrian "%s: overriding tid %d pri %d -> %d\n", 1696236880Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1697236880Sadrian#endif 1698236880Sadrian pri = TID_TO_WME_AC(o_tid); 1699236880Sadrian } 1700236880Sadrian 1701236880Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1702236880Sadrian 1703218154Sadrian /* Handle encryption twiddling if needed */ 1704227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1705227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1706227364Sadrian &hdrlen, &pktlen, &keyix)) { 1707218154Sadrian ath_freetx(m0); 1708218154Sadrian return EIO; 1709218154Sadrian } 1710218154Sadrian /* packet header may have moved, reset our local pointer */ 1711218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1712218065Sadrian 1713227364Sadrian /* Do the generic frame setup */ 1714227364Sadrian /* XXX should just bzero the bf_state? */ 1715227364Sadrian bf->bf_state.bfs_dobaw = 0; 1716227364Sadrian 1717218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1718218065Sadrian if (error != 0) 1719218065Sadrian return error; 1720218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1721218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1722218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1723218065Sadrian 1724218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1725218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1726218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1727218065Sadrian flags |= HAL_TXDESC_RTSENA; 1728227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1729227364Sadrian /* XXX assume 11g/11n protection? */ 1730227364Sadrian bf->bf_state.bfs_doprot = 1; 1731218065Sadrian flags |= HAL_TXDESC_CTSENA; 1732227364Sadrian } 1733218065Sadrian /* XXX leave ismcast to injector? */ 1734218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1735218065Sadrian flags |= HAL_TXDESC_NOACK; 1736218065Sadrian 1737218065Sadrian rt = sc->sc_currates; 1738218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1739218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1740218065Sadrian txrate = rt->info[rix].rateCode; 1741218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1742218065Sadrian txrate |= rt->info[rix].shortPreamble; 1743218065Sadrian sc->sc_txrix = rix; 1744218065Sadrian try0 = params->ibp_try0; 1745218065Sadrian ismrr = (params->ibp_try1 != 0); 1746218065Sadrian txantenna = params->ibp_pri >> 2; 1747218065Sadrian if (txantenna == 0) /* XXX? */ 1748218065Sadrian txantenna = sc->sc_txantenna; 1749218157Sadrian 1750227364Sadrian /* 1751227364Sadrian * Since ctsrate is fixed, store it away for later 1752227364Sadrian * use when the descriptor fields are being set. 1753227364Sadrian */ 1754227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1755227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1756218157Sadrian 1757218065Sadrian /* 1758218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1759218065Sadrian * set the sequence number, duration, etc. 1760218065Sadrian */ 1761218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1762218065Sadrian 1763218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1764218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1765218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1766218065Sadrian 1767218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1768218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1769218065Sadrian 1770218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1771218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1772218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1773218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1774218065Sadrian if (m0->m_flags & M_FRAG) 1775218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1776218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1777218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1778218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1779218065Sadrian 1780218065Sadrian ieee80211_radiotap_tx(vap, m0); 1781218065Sadrian } 1782218065Sadrian 1783218065Sadrian /* 1784218065Sadrian * Formulate first tx descriptor with tx controls. 1785218065Sadrian */ 1786218065Sadrian ds = bf->bf_desc; 1787218065Sadrian /* XXX check return value? */ 1788227364Sadrian 1789227364Sadrian /* Store the decided rate index values away */ 1790227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1791227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1792227364Sadrian bf->bf_state.bfs_atype = atype; 1793227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1794227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1795227364Sadrian bf->bf_state.bfs_try0 = try0; 1796227364Sadrian bf->bf_state.bfs_keyix = keyix; 1797227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1798233966Sadrian bf->bf_state.bfs_txflags = flags; 1799227364Sadrian bf->bf_state.bfs_shpream = 1800227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1801218065Sadrian 1802227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1803227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1804227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1805227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1806218240Sadrian 1807227364Sadrian /* Blank the legacy rate array */ 1808227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1809218240Sadrian 1810227364Sadrian bf->bf_state.bfs_rc[0].rix = 1811227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1812227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1813227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1814227364Sadrian 1815227364Sadrian if (ismrr) { 1816227364Sadrian int rix; 1817227364Sadrian 1818227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1819227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1820227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1821227364Sadrian 1822227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1823227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1824227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1825227364Sadrian 1826227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1827227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1828227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1829218065Sadrian } 1830227364Sadrian /* 1831227364Sadrian * All the required rate control decisions have been made; 1832227364Sadrian * fill in the rc flags. 1833227364Sadrian */ 1834227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1835218065Sadrian 1836227364Sadrian /* NB: no buffered multicast in power save support */ 1837227364Sadrian 1838227364Sadrian /* 1839227364Sadrian * If we're overiding the ADDBA destination, dump directly 1840227364Sadrian * into the hardware queue, right after any pending 1841227364Sadrian * frames to that node are. 1842227364Sadrian */ 1843227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1844227364Sadrian __func__, do_override); 1845227364Sadrian 1846227364Sadrian if (do_override) { 1847227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1848227364Sadrian } else { 1849227364Sadrian /* Queue to software queue */ 1850227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1851227364Sadrian } 1852236880Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1853227364Sadrian 1854218065Sadrian return 0; 1855218065Sadrian} 1856218065Sadrian 1857227364Sadrian/* 1858227364Sadrian * Send a raw frame. 1859227364Sadrian * 1860227364Sadrian * This can be called by net80211. 1861227364Sadrian */ 1862218065Sadrianint 1863218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1864218065Sadrian const struct ieee80211_bpf_params *params) 1865218065Sadrian{ 1866218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1867218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1868218065Sadrian struct ath_softc *sc = ifp->if_softc; 1869218065Sadrian struct ath_buf *bf; 1870232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1871232764Sadrian int error = 0; 1872218065Sadrian 1873227651Sadrian ATH_PCU_LOCK(sc); 1874227651Sadrian if (sc->sc_inreset_cnt > 0) { 1875227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 1876227651Sadrian __func__); 1877227651Sadrian error = EIO; 1878227651Sadrian ATH_PCU_UNLOCK(sc); 1879227651Sadrian goto bad0; 1880227651Sadrian } 1881227651Sadrian sc->sc_txstart_cnt++; 1882227651Sadrian ATH_PCU_UNLOCK(sc); 1883227651Sadrian 1884218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 1885218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 1886218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 1887218065Sadrian "!running" : "invalid"); 1888218065Sadrian m_freem(m); 1889218065Sadrian error = ENETDOWN; 1890218065Sadrian goto bad; 1891218065Sadrian } 1892232764Sadrian 1893218065Sadrian /* 1894232764Sadrian * Enforce how deep the multicast queue can grow. 1895232764Sadrian * 1896232764Sadrian * XXX duplicated in ath_tx_start(). 1897232764Sadrian */ 1898232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1899232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1900232764Sadrian 1901232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1902232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1903232764Sadrian error = ENOBUFS; 1904232764Sadrian } 1905232764Sadrian 1906232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1907232764Sadrian 1908232764Sadrian if (error != 0) { 1909232764Sadrian m_freem(m); 1910232764Sadrian goto bad; 1911232764Sadrian } 1912232764Sadrian } 1913232764Sadrian 1914232764Sadrian /* 1915218065Sadrian * Grab a TX buffer and associated resources. 1916218065Sadrian */ 1917237000Sadrian bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 1918218065Sadrian if (bf == NULL) { 1919218065Sadrian sc->sc_stats.ast_tx_nobuf++; 1920218065Sadrian m_freem(m); 1921218065Sadrian error = ENOBUFS; 1922218065Sadrian goto bad; 1923218065Sadrian } 1924218065Sadrian 1925218065Sadrian if (params == NULL) { 1926218065Sadrian /* 1927218065Sadrian * Legacy path; interpret frame contents to decide 1928218065Sadrian * precisely how to send the frame. 1929218065Sadrian */ 1930218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 1931218065Sadrian error = EIO; /* XXX */ 1932218065Sadrian goto bad2; 1933218065Sadrian } 1934218065Sadrian } else { 1935218065Sadrian /* 1936218065Sadrian * Caller supplied explicit parameters to use in 1937218065Sadrian * sending the frame. 1938218065Sadrian */ 1939218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 1940218065Sadrian error = EIO; /* XXX */ 1941218065Sadrian goto bad2; 1942218065Sadrian } 1943218065Sadrian } 1944218065Sadrian sc->sc_wd_timer = 5; 1945218065Sadrian ifp->if_opackets++; 1946218065Sadrian sc->sc_stats.ast_tx_raw++; 1947218065Sadrian 1948227651Sadrian ATH_PCU_LOCK(sc); 1949227651Sadrian sc->sc_txstart_cnt--; 1950227651Sadrian ATH_PCU_UNLOCK(sc); 1951227651Sadrian 1952218065Sadrian return 0; 1953218065Sadrianbad2: 1954218065Sadrian ATH_TXBUF_LOCK(sc); 1955236993Sadrian ath_returnbuf_head(sc, bf); 1956218065Sadrian ATH_TXBUF_UNLOCK(sc); 1957218065Sadrianbad: 1958227651Sadrian ATH_PCU_LOCK(sc); 1959227651Sadrian sc->sc_txstart_cnt--; 1960227651Sadrian ATH_PCU_UNLOCK(sc); 1961227651Sadrianbad0: 1962218065Sadrian ifp->if_oerrors++; 1963218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 1964218065Sadrian ieee80211_free_node(ni); 1965227651Sadrian 1966218065Sadrian return error; 1967218065Sadrian} 1968227364Sadrian 1969227364Sadrian/* Some helper functions */ 1970227364Sadrian 1971227364Sadrian/* 1972227364Sadrian * ADDBA (and potentially others) need to be placed in the same 1973227364Sadrian * hardware queue as the TID/node it's relating to. This is so 1974227364Sadrian * it goes out after any pending non-aggregate frames to the 1975227364Sadrian * same node/TID. 1976227364Sadrian * 1977227364Sadrian * If this isn't done, the ADDBA can go out before the frames 1978227364Sadrian * queued in hardware. Even though these frames have a sequence 1979227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 1980227364Sadrian * no frames whose sequence numbers are after the ADDBA should 1981227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 1982227364Sadrian * will simply drop them as being out of the BAW. 1983227364Sadrian * 1984227364Sadrian * The frames can't be appended to the TID software queue - it'll 1985227364Sadrian * never be sent out. So these frames have to be directly 1986227364Sadrian * dispatched to the hardware, rather than queued in software. 1987227364Sadrian * So if this function returns true, the TXQ has to be 1988227364Sadrian * overridden and it has to be directly dispatched. 1989227364Sadrian * 1990227364Sadrian * It's a dirty hack, but someone's gotta do it. 1991227364Sadrian */ 1992227364Sadrian 1993227364Sadrian/* 1994227364Sadrian * XXX doesn't belong here! 1995227364Sadrian */ 1996227364Sadrianstatic int 1997227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 1998227364Sadrian{ 1999227364Sadrian /* Type: Management frame? */ 2000227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 2001227364Sadrian IEEE80211_FC0_TYPE_MGT) 2002227364Sadrian return 0; 2003227364Sadrian 2004227364Sadrian /* Subtype: Action frame? */ 2005227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 2006227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 2007227364Sadrian return 0; 2008227364Sadrian 2009227364Sadrian return 1; 2010227364Sadrian} 2011227364Sadrian 2012227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 2013227364Sadrian/* 2014227364Sadrian * Return an alternate TID for ADDBA request frames. 2015227364Sadrian * 2016227364Sadrian * Yes, this likely should be done in the net80211 layer. 2017227364Sadrian */ 2018227364Sadrianstatic int 2019227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 2020227364Sadrian struct ieee80211_node *ni, 2021227364Sadrian struct mbuf *m0, int *tid) 2022227364Sadrian{ 2023227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 2024227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 2025227364Sadrian uint8_t *frm; 2026227364Sadrian uint16_t baparamset; 2027227364Sadrian 2028227364Sadrian /* Not action frame? Bail */ 2029227364Sadrian if (! ieee80211_is_action(wh)) 2030227364Sadrian return 0; 2031227364Sadrian 2032227364Sadrian /* XXX Not needed for frames we send? */ 2033227364Sadrian#if 0 2034227364Sadrian /* Correct length? */ 2035227364Sadrian if (! ieee80211_parse_action(ni, m)) 2036227364Sadrian return 0; 2037227364Sadrian#endif 2038227364Sadrian 2039227364Sadrian /* Extract out action frame */ 2040227364Sadrian frm = (u_int8_t *)&wh[1]; 2041227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 2042227364Sadrian 2043227364Sadrian /* Not ADDBA? Bail */ 2044227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 2045227364Sadrian return 0; 2046227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 2047227364Sadrian return 0; 2048227364Sadrian 2049227364Sadrian /* Extract TID, return it */ 2050227364Sadrian baparamset = le16toh(ia->rq_baparamset); 2051227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 2052227364Sadrian 2053227364Sadrian return 1; 2054227364Sadrian} 2055227364Sadrian#undef MS 2056227364Sadrian 2057227364Sadrian/* Per-node software queue operations */ 2058227364Sadrian 2059227364Sadrian/* 2060227364Sadrian * Add the current packet to the given BAW. 2061227364Sadrian * It is assumed that the current packet 2062227364Sadrian * 2063227364Sadrian * + fits inside the BAW; 2064227364Sadrian * + already has had a sequence number allocated. 2065227364Sadrian * 2066227364Sadrian * Since the BAW status may be modified by both the ath task and 2067227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2068227364Sadrian */ 2069227364Sadrianvoid 2070227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 2071227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 2072227364Sadrian{ 2073227364Sadrian int index, cindex; 2074227364Sadrian struct ieee80211_tx_ampdu *tap; 2075227364Sadrian 2076227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2077236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2078227364Sadrian 2079227364Sadrian if (bf->bf_state.bfs_isretried) 2080227364Sadrian return; 2081227364Sadrian 2082236886Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2083236886Sadrian 2084236880Sadrian if (! bf->bf_state.bfs_dobaw) { 2085236880Sadrian device_printf(sc->sc_dev, 2086236880Sadrian "%s: dobaw=0, seqno=%d, window %d:%d\n", 2087236880Sadrian __func__, 2088236880Sadrian SEQNO(bf->bf_state.bfs_seqno), 2089236880Sadrian tap->txa_start, 2090236880Sadrian tap->txa_wnd); 2091236880Sadrian } 2092236880Sadrian 2093227364Sadrian if (bf->bf_state.bfs_addedbaw) 2094227364Sadrian device_printf(sc->sc_dev, 2095236872Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 2096229949Sadrian "baw head=%d tail=%d\n", 2097236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2098229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2099229949Sadrian tid->baw_tail); 2100227364Sadrian 2101227364Sadrian /* 2102236880Sadrian * Verify that the given sequence number is not outside of the 2103236880Sadrian * BAW. Complain loudly if that's the case. 2104236880Sadrian */ 2105236880Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2106236880Sadrian SEQNO(bf->bf_state.bfs_seqno))) { 2107236880Sadrian device_printf(sc->sc_dev, 2108236880Sadrian "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; " 2109236880Sadrian "baw head=%d tail=%d\n", 2110236880Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2111236880Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2112236880Sadrian tid->baw_tail); 2113236880Sadrian } 2114236880Sadrian 2115236880Sadrian /* 2116227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2117227364Sadrian * the txa state contains the current baw start. 2118227364Sadrian */ 2119227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2120227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2121227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2122236872Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2123229949Sadrian "baw head=%d tail=%d\n", 2124236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2125229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2126229949Sadrian tid->baw_tail); 2127227364Sadrian 2128227364Sadrian 2129227364Sadrian#if 0 2130227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2131227364Sadrian#endif 2132227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2133227364Sadrian device_printf(sc->sc_dev, 2134227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2135227364Sadrian "head=%d, tail=%d)\n", 2136227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2137227364Sadrian device_printf(sc->sc_dev, 2138227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2139227364Sadrian __func__, 2140227364Sadrian tid->tx_buf[cindex], 2141227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2142227364Sadrian bf, 2143227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2144227364Sadrian ); 2145227364Sadrian } 2146227364Sadrian tid->tx_buf[cindex] = bf; 2147227364Sadrian 2148229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2149229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2150227364Sadrian tid->baw_tail = cindex; 2151227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2152227364Sadrian } 2153227364Sadrian} 2154227364Sadrian 2155227364Sadrian/* 2156227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2157227398Sadrian * 2158227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2159227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2160227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2161227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2162227398Sadrian * tracking array to maintain consistency. 2163227398Sadrian */ 2164227398Sadrianstatic void 2165227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2166227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2167227398Sadrian{ 2168227398Sadrian int index, cindex; 2169227398Sadrian struct ieee80211_tx_ampdu *tap; 2170227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2171227398Sadrian 2172227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2173236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2174227398Sadrian 2175227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2176227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2177227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2178227398Sadrian 2179227398Sadrian /* 2180227398Sadrian * Just warn for now; if it happens then we should find out 2181227398Sadrian * about it. It's highly likely the aggregation session will 2182227398Sadrian * soon hang. 2183227398Sadrian */ 2184227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2185227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2186227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2187227398Sadrian __func__); 2188227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2189227398Sadrian __func__, 2190227398Sadrian old_bf->bf_state.bfs_seqno, 2191227398Sadrian new_bf->bf_state.bfs_seqno); 2192227398Sadrian } 2193227398Sadrian 2194227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2195227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2196227398Sadrian " has m BA session may hang.\n", 2197227398Sadrian __func__); 2198227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2199227398Sadrian __func__, 2200227398Sadrian old_bf, new_bf); 2201227398Sadrian } 2202227398Sadrian 2203227398Sadrian tid->tx_buf[cindex] = new_bf; 2204227398Sadrian} 2205227398Sadrian 2206227398Sadrian/* 2207227364Sadrian * seq_start - left edge of BAW 2208227364Sadrian * seq_next - current/next sequence number to allocate 2209227364Sadrian * 2210227364Sadrian * Since the BAW status may be modified by both the ath task and 2211227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2212227364Sadrian */ 2213227364Sadrianstatic void 2214227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2215227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2216227364Sadrian{ 2217227364Sadrian int index, cindex; 2218227364Sadrian struct ieee80211_tx_ampdu *tap; 2219227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2220227364Sadrian 2221227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2222236879Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2223227364Sadrian 2224227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2225227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2226227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2227227364Sadrian 2228227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2229236872Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2230229949Sadrian "baw head=%d, tail=%d\n", 2231236872Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2232227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2233227364Sadrian 2234227364Sadrian /* 2235227364Sadrian * If this occurs then we have a big problem - something else 2236227364Sadrian * has slid tap->txa_start along without updating the BAW 2237227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2238227364Sadrian * completely busted. 2239227364Sadrian * 2240227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2241227364Sadrian * it's quite possible that a cloned buffer is making its way 2242227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2243227364Sadrian */ 2244227364Sadrian if (tid->tx_buf[cindex] != bf) { 2245227364Sadrian device_printf(sc->sc_dev, 2246227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2247227364Sadrian __func__, 2248227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2249227364Sadrian tid->tx_buf[cindex], 2250227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2251227364Sadrian } 2252227364Sadrian 2253227364Sadrian tid->tx_buf[cindex] = NULL; 2254227364Sadrian 2255229949Sadrian while (tid->baw_head != tid->baw_tail && 2256229949Sadrian !tid->tx_buf[tid->baw_head]) { 2257227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2258227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2259227364Sadrian } 2260229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2261229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2262227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2263227364Sadrian} 2264227364Sadrian 2265227364Sadrian/* 2266227364Sadrian * Mark the current node/TID as ready to TX. 2267227364Sadrian * 2268227364Sadrian * This is done to make it easy for the software scheduler to 2269227364Sadrian * find which nodes have data to send. 2270227364Sadrian * 2271227364Sadrian * The TXQ lock must be held. 2272227364Sadrian */ 2273227364Sadrianstatic void 2274227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2275227364Sadrian{ 2276227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2277227364Sadrian 2278227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2279227364Sadrian 2280227364Sadrian if (tid->paused) 2281227364Sadrian return; /* paused, can't schedule yet */ 2282227364Sadrian 2283227364Sadrian if (tid->sched) 2284227364Sadrian return; /* already scheduled */ 2285227364Sadrian 2286227364Sadrian tid->sched = 1; 2287227364Sadrian 2288227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2289227364Sadrian} 2290227364Sadrian 2291227364Sadrian/* 2292227364Sadrian * Mark the current node as no longer needing to be polled for 2293227364Sadrian * TX packets. 2294227364Sadrian * 2295227364Sadrian * The TXQ lock must be held. 2296227364Sadrian */ 2297227364Sadrianstatic void 2298227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2299227364Sadrian{ 2300227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2301227364Sadrian 2302227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2303227364Sadrian 2304227364Sadrian if (tid->sched == 0) 2305227364Sadrian return; 2306227364Sadrian 2307227364Sadrian tid->sched = 0; 2308227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2309227364Sadrian} 2310227364Sadrian 2311227364Sadrian/* 2312227364Sadrian * Assign a sequence number manually to the given frame. 2313227364Sadrian * 2314227364Sadrian * This should only be called for A-MPDU TX frames. 2315227364Sadrian */ 2316236872Sadrianstatic ieee80211_seq 2317227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2318227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2319227364Sadrian{ 2320227364Sadrian struct ieee80211_frame *wh; 2321227364Sadrian int tid, pri; 2322227364Sadrian ieee80211_seq seqno; 2323227364Sadrian uint8_t subtype; 2324227364Sadrian 2325227364Sadrian /* TID lookup */ 2326227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2327227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2328227364Sadrian tid = WME_AC_TO_TID(pri); 2329236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2330236872Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2331227364Sadrian 2332227364Sadrian /* XXX Is it a control frame? Ignore */ 2333227364Sadrian 2334227364Sadrian /* Does the packet require a sequence number? */ 2335227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2336227364Sadrian return -1; 2337227364Sadrian 2338236880Sadrian ATH_TID_LOCK_ASSERT(sc, &(ATH_NODE(ni)->an_tid[tid])); 2339236880Sadrian 2340227364Sadrian /* 2341227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2342227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2343227364Sadrian * 2344227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2345227364Sadrian * data frame sequence number in the aggregation state updates, so 2346227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2347227364Sadrian * RX side. 2348227364Sadrian */ 2349227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2350227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2351236880Sadrian /* XXX no locking for this TID? This is a bit of a problem. */ 2352227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2353227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2354227364Sadrian } else { 2355227364Sadrian /* Manually assign sequence number */ 2356227364Sadrian seqno = ni->ni_txseqs[tid]; 2357227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2358227364Sadrian } 2359227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2360227364Sadrian M_SEQNO_SET(m0, seqno); 2361227364Sadrian 2362227364Sadrian /* Return so caller can do something with it if needed */ 2363236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2364227364Sadrian return seqno; 2365227364Sadrian} 2366227364Sadrian 2367227364Sadrian/* 2368227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2369227364Sadrian * If the frame is out of BAW, queue. 2370227364Sadrian * Otherwise, schedule it as a single frame. 2371227364Sadrian */ 2372227364Sadrianstatic void 2373227364Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, struct ath_buf *bf) 2374227364Sadrian{ 2375227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2376227364Sadrian struct ath_txq *txq = bf->bf_state.bfs_txq; 2377227364Sadrian struct ieee80211_tx_ampdu *tap; 2378227364Sadrian 2379227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2380236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2381227364Sadrian 2382227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2383227364Sadrian 2384227364Sadrian /* paused? queue */ 2385227364Sadrian if (tid->paused) { 2386236876Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2387233480Sadrian /* XXX don't sched - we're paused! */ 2388227364Sadrian return; 2389227364Sadrian } 2390227364Sadrian 2391227364Sadrian /* outside baw? queue */ 2392227364Sadrian if (bf->bf_state.bfs_dobaw && 2393227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2394227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2395236878Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2396227364Sadrian ath_tx_tid_sched(sc, tid); 2397227364Sadrian return; 2398227364Sadrian } 2399227364Sadrian 2400227364Sadrian /* Direct dispatch to hardware */ 2401227364Sadrian ath_tx_do_ratelookup(sc, bf); 2402233989Sadrian ath_tx_calc_duration(sc, bf); 2403233989Sadrian ath_tx_calc_protection(sc, bf); 2404233989Sadrian ath_tx_set_rtscts(sc, bf); 2405227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2406227364Sadrian ath_tx_setds(sc, bf); 2407227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 2408227364Sadrian ath_tx_chaindesclist(sc, bf); 2409227364Sadrian 2410227364Sadrian /* Statistics */ 2411227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2412227364Sadrian 2413227364Sadrian /* Track per-TID hardware queue depth correctly */ 2414227364Sadrian tid->hwq_depth++; 2415227364Sadrian 2416227364Sadrian /* Add to BAW */ 2417227364Sadrian if (bf->bf_state.bfs_dobaw) { 2418227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2419227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2420227364Sadrian } 2421227364Sadrian 2422227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2423227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2424227364Sadrian 2425227364Sadrian /* Hand off to hardware */ 2426227364Sadrian ath_tx_handoff(sc, txq, bf); 2427227364Sadrian} 2428227364Sadrian 2429227364Sadrian/* 2430227364Sadrian * Attempt to send the packet. 2431227364Sadrian * If the queue isn't busy, direct-dispatch. 2432227364Sadrian * If the queue is busy enough, queue the given packet on the 2433227364Sadrian * relevant software queue. 2434227364Sadrian */ 2435227364Sadrianvoid 2436227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2437227364Sadrian struct ath_buf *bf) 2438227364Sadrian{ 2439227364Sadrian struct ath_node *an = ATH_NODE(ni); 2440227364Sadrian struct ieee80211_frame *wh; 2441227364Sadrian struct ath_tid *atid; 2442227364Sadrian int pri, tid; 2443227364Sadrian struct mbuf *m0 = bf->bf_m; 2444227364Sadrian 2445236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2446236880Sadrian 2447227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2448227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2449227364Sadrian pri = ath_tx_getac(sc, m0); 2450227364Sadrian tid = ath_tx_gettid(sc, m0); 2451227364Sadrian atid = &an->an_tid[tid]; 2452227364Sadrian 2453236873Sadrian ATH_TID_LOCK_ASSERT(sc, atid); 2454236873Sadrian 2455236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2456236872Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2457227364Sadrian 2458227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2459227364Sadrian bf->bf_state.bfs_tid = tid; 2460227364Sadrian bf->bf_state.bfs_txq = txq; 2461227364Sadrian bf->bf_state.bfs_pri = pri; 2462227364Sadrian 2463227364Sadrian /* 2464227364Sadrian * If the hardware queue isn't busy, queue it directly. 2465227364Sadrian * If the hardware queue is busy, queue it. 2466227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2467227364Sadrian * queue it. 2468227364Sadrian */ 2469227364Sadrian if (atid->paused) { 2470227364Sadrian /* TID is paused, queue */ 2471236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2472227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2473227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2474227364Sadrian /* AMPDU pending; queue */ 2475236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2476227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2477227364Sadrian /* XXX sched? */ 2478227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2479227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2480236877Sadrian 2481236877Sadrian /* 2482236877Sadrian * Always queue the frame to the tail of the list. 2483236877Sadrian */ 2484236877Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2485236877Sadrian 2486236877Sadrian /* 2487236877Sadrian * If the hardware queue isn't busy, direct dispatch 2488236877Sadrian * the head frame in the list. Don't schedule the 2489236877Sadrian * TID - let it build some more frames first? 2490236877Sadrian * 2491236877Sadrian * Otherwise, schedule the TID. 2492236877Sadrian */ 2493229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2494236877Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2495236877Sadrian ATH_TXQ_REMOVE(atid, bf, bf_list); 2496236872Sadrian ath_tx_xmit_aggr(sc, an, bf); 2497233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2498236872Sadrian "%s: xmit_aggr\n", 2499236872Sadrian __func__); 2500229949Sadrian } else { 2501229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2502236872Sadrian "%s: ampdu; swq'ing\n", 2503236872Sadrian __func__); 2504227364Sadrian ath_tx_tid_sched(sc, atid); 2505227364Sadrian } 2506227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2507227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2508236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2509227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2510227364Sadrian } else { 2511227364Sadrian /* Busy; queue */ 2512236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2513227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2514227364Sadrian ath_tx_tid_sched(sc, atid); 2515227364Sadrian } 2516227364Sadrian} 2517227364Sadrian 2518227364Sadrian/* 2519227364Sadrian * Do the basic frame setup stuff that's required before the frame 2520227364Sadrian * is added to a software queue. 2521227364Sadrian * 2522227364Sadrian * All frames get mostly the same treatment and it's done once. 2523227364Sadrian * Retransmits fiddle with things like the rate control setup, 2524227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2525227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2526227364Sadrian * 2527227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2528227364Sadrian * m0 may not be valid. 2529227364Sadrian */ 2530227364Sadrian 2531227364Sadrian 2532227364Sadrian/* 2533227364Sadrian * Configure the per-TID node state. 2534227364Sadrian * 2535227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2536227364Sadrian * else to put it just yet. 2537227364Sadrian * 2538227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2539227364Sadrian */ 2540227364Sadrianvoid 2541227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2542227364Sadrian{ 2543227364Sadrian int i, j; 2544227364Sadrian struct ath_tid *atid; 2545227364Sadrian 2546227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2547227364Sadrian atid = &an->an_tid[i]; 2548227364Sadrian TAILQ_INIT(&atid->axq_q); 2549227364Sadrian atid->tid = i; 2550227364Sadrian atid->an = an; 2551227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2552227364Sadrian atid->tx_buf[j] = NULL; 2553227364Sadrian atid->baw_head = atid->baw_tail = 0; 2554227364Sadrian atid->paused = 0; 2555227364Sadrian atid->sched = 0; 2556227364Sadrian atid->hwq_depth = 0; 2557227364Sadrian atid->cleanup_inprogress = 0; 2558227364Sadrian if (i == IEEE80211_NONQOS_TID) 2559227364Sadrian atid->ac = WME_AC_BE; 2560227364Sadrian else 2561227364Sadrian atid->ac = TID_TO_WME_AC(i); 2562227364Sadrian } 2563227364Sadrian} 2564227364Sadrian 2565227364Sadrian/* 2566227364Sadrian * Pause the current TID. This stops packets from being transmitted 2567227364Sadrian * on it. 2568227364Sadrian * 2569227364Sadrian * Since this is also called from upper layers as well as the driver, 2570227364Sadrian * it will get the TID lock. 2571227364Sadrian */ 2572227364Sadrianstatic void 2573227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2574227364Sadrian{ 2575233908Sadrian 2576233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2577227364Sadrian tid->paused++; 2578227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2579227364Sadrian __func__, tid->paused); 2580227364Sadrian} 2581227364Sadrian 2582227364Sadrian/* 2583227364Sadrian * Unpause the current TID, and schedule it if needed. 2584227364Sadrian */ 2585227364Sadrianstatic void 2586227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2587227364Sadrian{ 2588227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2589227364Sadrian 2590227364Sadrian tid->paused--; 2591227364Sadrian 2592227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2593227364Sadrian __func__, tid->paused); 2594227364Sadrian 2595227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2596227364Sadrian return; 2597227364Sadrian } 2598227364Sadrian 2599227364Sadrian ath_tx_tid_sched(sc, tid); 2600227364Sadrian /* Punt some frames to the hardware if needed */ 2601233673Sadrian //ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2602233673Sadrian taskqueue_enqueue(sc->sc_tq, &sc->sc_txqtask); 2603227364Sadrian} 2604227364Sadrian 2605227364Sadrian/* 2606233908Sadrian * Suspend the queue because we need to TX a BAR. 2607233908Sadrian */ 2608233908Sadrianstatic void 2609233908Sadrianath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid) 2610233908Sadrian{ 2611233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2612233908Sadrian 2613235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2614235676Sadrian "%s: tid=%p, bar_wait=%d, bar_tx=%d, called\n", 2615233908Sadrian __func__, 2616235676Sadrian tid, 2617235676Sadrian tid->bar_wait, 2618235676Sadrian tid->bar_tx); 2619233908Sadrian 2620233908Sadrian /* We shouldn't be called when bar_tx is 1 */ 2621233908Sadrian if (tid->bar_tx) { 2622233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx is 1?!\n", 2623233908Sadrian __func__); 2624233908Sadrian } 2625233908Sadrian 2626233908Sadrian /* If we've already been called, just be patient. */ 2627233908Sadrian if (tid->bar_wait) 2628233908Sadrian return; 2629233908Sadrian 2630233908Sadrian /* Wait! */ 2631233908Sadrian tid->bar_wait = 1; 2632233908Sadrian 2633233908Sadrian /* Only one pause, no matter how many frames fail */ 2634233908Sadrian ath_tx_tid_pause(sc, tid); 2635233908Sadrian} 2636233908Sadrian 2637233908Sadrian/* 2638233908Sadrian * We've finished with BAR handling - either we succeeded or 2639233908Sadrian * failed. Either way, unsuspend TX. 2640233908Sadrian */ 2641233908Sadrianstatic void 2642233908Sadrianath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid) 2643233908Sadrian{ 2644233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2645233908Sadrian 2646235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2647233908Sadrian "%s: tid=%p, called\n", 2648233908Sadrian __func__, 2649233908Sadrian tid); 2650233908Sadrian 2651233908Sadrian if (tid->bar_tx == 0 || tid->bar_wait == 0) { 2652233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx=%d, bar_wait=%d: ?\n", 2653233908Sadrian __func__, tid->bar_tx, tid->bar_wait); 2654233908Sadrian } 2655233908Sadrian 2656233908Sadrian tid->bar_tx = tid->bar_wait = 0; 2657233908Sadrian ath_tx_tid_resume(sc, tid); 2658233908Sadrian} 2659233908Sadrian 2660233908Sadrian/* 2661233908Sadrian * Return whether we're ready to TX a BAR frame. 2662233908Sadrian * 2663233908Sadrian * Requires the TID lock be held. 2664233908Sadrian */ 2665233908Sadrianstatic int 2666233908Sadrianath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid) 2667233908Sadrian{ 2668233908Sadrian 2669233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2670233908Sadrian 2671233908Sadrian if (tid->bar_wait == 0 || tid->hwq_depth > 0) 2672233908Sadrian return (0); 2673233908Sadrian 2674235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, "%s: tid=%p (%d), bar ready\n", 2675235491Sadrian __func__, tid, tid->tid); 2676235491Sadrian 2677233908Sadrian return (1); 2678233908Sadrian} 2679233908Sadrian 2680233908Sadrian/* 2681233908Sadrian * Check whether the current TID is ready to have a BAR 2682233908Sadrian * TXed and if so, do the TX. 2683233908Sadrian * 2684233908Sadrian * Since the TID/TXQ lock can't be held during a call to 2685233908Sadrian * ieee80211_send_bar(), we have to do the dirty thing of unlocking it, 2686233908Sadrian * sending the BAR and locking it again. 2687233908Sadrian * 2688233908Sadrian * Eventually, the code to send the BAR should be broken out 2689233908Sadrian * from this routine so the lock doesn't have to be reacquired 2690233908Sadrian * just to be immediately dropped by the caller. 2691233908Sadrian */ 2692233908Sadrianstatic void 2693233908Sadrianath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid) 2694233908Sadrian{ 2695233908Sadrian struct ieee80211_tx_ampdu *tap; 2696233908Sadrian 2697233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2698233908Sadrian 2699235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2700233908Sadrian "%s: tid=%p, called\n", 2701233908Sadrian __func__, 2702233908Sadrian tid); 2703233908Sadrian 2704233908Sadrian tap = ath_tx_get_tx_tid(tid->an, tid->tid); 2705233908Sadrian 2706233908Sadrian /* 2707233908Sadrian * This is an error condition! 2708233908Sadrian */ 2709233908Sadrian if (tid->bar_wait == 0 || tid->bar_tx == 1) { 2710233908Sadrian device_printf(sc->sc_dev, 2711233908Sadrian "%s: tid=%p, bar_tx=%d, bar_wait=%d: ?\n", 2712233908Sadrian __func__, 2713233908Sadrian tid, 2714233908Sadrian tid->bar_tx, 2715233908Sadrian tid->bar_wait); 2716233908Sadrian return; 2717233908Sadrian } 2718233908Sadrian 2719233908Sadrian /* Don't do anything if we still have pending frames */ 2720233908Sadrian if (tid->hwq_depth > 0) { 2721235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2722233908Sadrian "%s: tid=%p, hwq_depth=%d, waiting\n", 2723233908Sadrian __func__, 2724233908Sadrian tid, 2725233908Sadrian tid->hwq_depth); 2726233908Sadrian return; 2727233908Sadrian } 2728233908Sadrian 2729233908Sadrian /* We're now about to TX */ 2730233908Sadrian tid->bar_tx = 1; 2731233908Sadrian 2732233908Sadrian /* 2733233908Sadrian * Calculate new BAW left edge, now that all frames have either 2734233908Sadrian * succeeded or failed. 2735233908Sadrian * 2736233908Sadrian * XXX verify this is _actually_ the valid value to begin at! 2737233908Sadrian */ 2738235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2739233908Sadrian "%s: tid=%p, new BAW left edge=%d\n", 2740233908Sadrian __func__, 2741233908Sadrian tid, 2742233908Sadrian tap->txa_start); 2743233908Sadrian 2744233908Sadrian /* Try sending the BAR frame */ 2745233908Sadrian /* We can't hold the lock here! */ 2746233908Sadrian 2747233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2748233908Sadrian if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) { 2749233908Sadrian /* Success? Now we wait for notification that it's done */ 2750233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2751233908Sadrian return; 2752233908Sadrian } 2753233908Sadrian 2754233908Sadrian /* Failure? For now, warn loudly and continue */ 2755233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2756233908Sadrian device_printf(sc->sc_dev, "%s: tid=%p, failed to TX BAR, continue!\n", 2757233908Sadrian __func__, tid); 2758233908Sadrian ath_tx_tid_bar_unsuspend(sc, tid); 2759233908Sadrian} 2760233908Sadrian 2761233908Sadrian 2762233908Sadrian/* 2763227364Sadrian * Free any packets currently pending in the software TX queue. 2764227364Sadrian * 2765227364Sadrian * This will be called when a node is being deleted. 2766227364Sadrian * 2767227364Sadrian * It can also be called on an active node during an interface 2768227364Sadrian * reset or state transition. 2769227364Sadrian * 2770227364Sadrian * (From Linux/reference): 2771227364Sadrian * 2772227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2773227364Sadrian * sequence number(s) without setting the retry bit. The 2774227364Sadrian * alternative is to give up on these and BAR the receiver's window 2775227364Sadrian * forward. 2776227364Sadrian */ 2777227364Sadrianstatic void 2778229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 2779229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 2780227364Sadrian{ 2781227364Sadrian struct ath_buf *bf; 2782227364Sadrian struct ieee80211_tx_ampdu *tap; 2783227364Sadrian struct ieee80211_node *ni = &an->an_node; 2784227364Sadrian int t = 0; 2785227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2786227364Sadrian 2787227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2788227364Sadrian 2789227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2790227364Sadrian 2791227364Sadrian /* Walk the queue, free frames */ 2792227364Sadrian for (;;) { 2793227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2794227364Sadrian if (bf == NULL) { 2795227364Sadrian break; 2796227364Sadrian } 2797227364Sadrian 2798227364Sadrian if (t == 0) { 2799227364Sadrian device_printf(sc->sc_dev, 2800233330Sadrian "%s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 2801236872Sadrian "seqno=%d, retry=%d\n", 2802233330Sadrian __func__, ni, bf, 2803233330Sadrian bf->bf_state.bfs_addedbaw, 2804233330Sadrian bf->bf_state.bfs_dobaw, 2805233480Sadrian SEQNO(bf->bf_state.bfs_seqno), 2806233480Sadrian bf->bf_state.bfs_retries); 2807233330Sadrian device_printf(sc->sc_dev, 2808235491Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d\n", 2809233480Sadrian __func__, ni, bf, 2810233480Sadrian tid->axq_depth, 2811235491Sadrian tid->hwq_depth, 2812235491Sadrian tid->bar_wait); 2813233480Sadrian device_printf(sc->sc_dev, 2814236872Sadrian "%s: node %p: tid %d: txq_depth=%d, " 2815227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2816229949Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, " 2817229949Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 2818236872Sadrian __func__, ni, tid->tid, txq->axq_depth, 2819227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2820227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2821227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2822227364Sadrian ni->ni_txseqs[tid->tid]); 2823229165Sadrian 2824229165Sadrian /* XXX Dump the frame, see what it is? */ 2825229165Sadrian ieee80211_dump_pkt(ni->ni_ic, 2826229165Sadrian mtod(bf->bf_m, const uint8_t *), 2827229165Sadrian bf->bf_m->m_len, 0, -1); 2828229165Sadrian 2829233897Sadrian t = 1; 2830227364Sadrian } 2831227364Sadrian 2832227364Sadrian 2833227364Sadrian /* 2834227364Sadrian * If the current TID is running AMPDU, update 2835227364Sadrian * the BAW. 2836227364Sadrian */ 2837227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 2838227364Sadrian bf->bf_state.bfs_dobaw) { 2839227364Sadrian /* 2840227364Sadrian * Only remove the frame from the BAW if it's 2841227364Sadrian * been transmitted at least once; this means 2842227364Sadrian * the frame was in the BAW to begin with. 2843227364Sadrian */ 2844227364Sadrian if (bf->bf_state.bfs_retries > 0) { 2845227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 2846227364Sadrian bf->bf_state.bfs_dobaw = 0; 2847227364Sadrian } 2848227364Sadrian /* 2849227364Sadrian * This has become a non-fatal error now 2850227364Sadrian */ 2851227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2852227364Sadrian device_printf(sc->sc_dev, 2853227364Sadrian "%s: wasn't added: seqno %d\n", 2854227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2855227364Sadrian } 2856227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 2857227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 2858227364Sadrian } 2859227364Sadrian 2860227364Sadrian /* 2861227364Sadrian * Now that it's completed, grab the TID lock and update 2862227364Sadrian * the sequence number and BAW window. 2863227364Sadrian * Because sequence numbers have been assigned to frames 2864227364Sadrian * that haven't been sent yet, it's entirely possible 2865227364Sadrian * we'll be called with some pending frames that have not 2866227364Sadrian * been transmitted. 2867227364Sadrian * 2868227364Sadrian * The cleaner solution is to do the sequence number allocation 2869227364Sadrian * when the packet is first transmitted - and thus the "retries" 2870227364Sadrian * check above would be enough to update the BAW/seqno. 2871227364Sadrian */ 2872227364Sadrian 2873227364Sadrian /* But don't do it for non-QoS TIDs */ 2874227364Sadrian if (tap) { 2875227364Sadrian#if 0 2876227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2877227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 2878227364Sadrian __func__, an, tid->tid, tap->txa_start); 2879227364Sadrian#endif 2880227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 2881227364Sadrian tid->baw_tail = tid->baw_head; 2882227364Sadrian } 2883227364Sadrian} 2884227364Sadrian 2885227364Sadrian/* 2886227364Sadrian * Flush all software queued packets for the given node. 2887227364Sadrian * 2888227364Sadrian * This occurs when a completion handler frees the last buffer 2889227364Sadrian * for a node, and the node is thus freed. This causes the node 2890227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 2891227364Sadrian */ 2892227364Sadrianvoid 2893227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 2894227364Sadrian{ 2895227364Sadrian int tid; 2896227364Sadrian ath_bufhead bf_cq; 2897227364Sadrian struct ath_buf *bf; 2898227364Sadrian 2899227364Sadrian TAILQ_INIT(&bf_cq); 2900227364Sadrian 2901227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 2902227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2903227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 2904227364Sadrian 2905227364Sadrian /* Remove this tid from the list of active tids */ 2906227364Sadrian ATH_TXQ_LOCK(txq); 2907227364Sadrian ath_tx_tid_unsched(sc, atid); 2908227364Sadrian 2909227364Sadrian /* Free packets */ 2910227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 2911227364Sadrian ATH_TXQ_UNLOCK(txq); 2912227364Sadrian } 2913227364Sadrian 2914227364Sadrian /* Handle completed frames */ 2915227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2916227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2917227364Sadrian ath_tx_default_comp(sc, bf, 0); 2918227364Sadrian } 2919227364Sadrian} 2920227364Sadrian 2921227364Sadrian/* 2922227364Sadrian * Drain all the software TXQs currently with traffic queued. 2923227364Sadrian */ 2924227364Sadrianvoid 2925227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 2926227364Sadrian{ 2927227364Sadrian struct ath_tid *tid; 2928227364Sadrian ath_bufhead bf_cq; 2929227364Sadrian struct ath_buf *bf; 2930227364Sadrian 2931227364Sadrian TAILQ_INIT(&bf_cq); 2932227364Sadrian ATH_TXQ_LOCK(txq); 2933227364Sadrian 2934227364Sadrian /* 2935227364Sadrian * Iterate over all active tids for the given txq, 2936227364Sadrian * flushing and unsched'ing them 2937227364Sadrian */ 2938227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 2939227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 2940227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 2941227364Sadrian ath_tx_tid_unsched(sc, tid); 2942227364Sadrian } 2943227364Sadrian 2944227364Sadrian ATH_TXQ_UNLOCK(txq); 2945227364Sadrian 2946227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2947227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2948227364Sadrian ath_tx_default_comp(sc, bf, 0); 2949227364Sadrian } 2950227364Sadrian} 2951227364Sadrian 2952227364Sadrian/* 2953227364Sadrian * Handle completion of non-aggregate session frames. 2954227364Sadrian */ 2955227364Sadrianvoid 2956227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 2957227364Sadrian{ 2958227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2959227364Sadrian struct ath_node *an = ATH_NODE(ni); 2960227364Sadrian int tid = bf->bf_state.bfs_tid; 2961227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2962227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 2963227364Sadrian 2964227364Sadrian /* The TID state is protected behind the TXQ lock */ 2965227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2966227364Sadrian 2967227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 2968227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 2969227364Sadrian 2970227364Sadrian atid->hwq_depth--; 2971227364Sadrian if (atid->hwq_depth < 0) 2972227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 2973227364Sadrian __func__, atid->hwq_depth); 2974227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2975227364Sadrian 2976227364Sadrian /* 2977227364Sadrian * punt to rate control if we're not being cleaned up 2978227364Sadrian * during a hw queue drain and the frame wanted an ACK. 2979227364Sadrian */ 2980233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 2981227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 2982227364Sadrian ts, bf->bf_state.bfs_pktlen, 2983227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 2984227364Sadrian 2985227364Sadrian ath_tx_default_comp(sc, bf, fail); 2986227364Sadrian} 2987227364Sadrian 2988227364Sadrian/* 2989227364Sadrian * Handle cleanup of aggregate session packets that aren't 2990227364Sadrian * an A-MPDU. 2991227364Sadrian * 2992227364Sadrian * There's no need to update the BAW here - the session is being 2993227364Sadrian * torn down. 2994227364Sadrian */ 2995227364Sadrianstatic void 2996227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2997227364Sadrian{ 2998227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2999227364Sadrian struct ath_node *an = ATH_NODE(ni); 3000227364Sadrian int tid = bf->bf_state.bfs_tid; 3001227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3002227364Sadrian 3003227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 3004227364Sadrian __func__, tid, atid->incomp); 3005227364Sadrian 3006227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3007227364Sadrian atid->incomp--; 3008227364Sadrian if (atid->incomp == 0) { 3009227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3010227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3011227364Sadrian __func__, tid); 3012227364Sadrian atid->cleanup_inprogress = 0; 3013227364Sadrian ath_tx_tid_resume(sc, atid); 3014227364Sadrian } 3015227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3016227364Sadrian 3017227364Sadrian ath_tx_default_comp(sc, bf, 0); 3018227364Sadrian} 3019227364Sadrian 3020227364Sadrian/* 3021227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 3022227364Sadrian * unaggregated. 3023227364Sadrian * 3024227364Sadrian * - Discard all retry frames from the s/w queue. 3025227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 3026227364Sadrian * - Count the number of unacked frames, and let transmit completion 3027227364Sadrian * handle it later. 3028227364Sadrian * 3029227364Sadrian * The caller is responsible for pausing the TID. 3030227364Sadrian */ 3031227364Sadrianstatic void 3032235749Sadrianath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 3033227364Sadrian{ 3034227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3035227364Sadrian struct ieee80211_tx_ampdu *tap; 3036227364Sadrian struct ath_buf *bf, *bf_next; 3037227364Sadrian ath_bufhead bf_cq; 3038227364Sadrian 3039235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 3040227364Sadrian "%s: TID %d: called\n", __func__, tid); 3041227364Sadrian 3042227364Sadrian TAILQ_INIT(&bf_cq); 3043227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3044227364Sadrian 3045227364Sadrian /* 3046227364Sadrian * Update the frames in the software TX queue: 3047227364Sadrian * 3048227364Sadrian * + Discard retry frames in the queue 3049227364Sadrian * + Fix the completion function to be non-aggregate 3050227364Sadrian */ 3051227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 3052227364Sadrian while (bf) { 3053227364Sadrian if (bf->bf_state.bfs_isretried) { 3054227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 3055227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 3056227364Sadrian atid->axq_depth--; 3057227364Sadrian if (bf->bf_state.bfs_dobaw) { 3058227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3059227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3060227364Sadrian device_printf(sc->sc_dev, 3061227364Sadrian "%s: wasn't added: seqno %d\n", 3062229949Sadrian __func__, 3063229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3064227364Sadrian } 3065227364Sadrian bf->bf_state.bfs_dobaw = 0; 3066227364Sadrian /* 3067227364Sadrian * Call the default completion handler with "fail" just 3068227364Sadrian * so upper levels are suitably notified about this. 3069227364Sadrian */ 3070227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3071227364Sadrian bf = bf_next; 3072227364Sadrian continue; 3073227364Sadrian } 3074227364Sadrian /* Give these the default completion handler */ 3075227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3076227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 3077227364Sadrian } 3078227364Sadrian 3079227364Sadrian /* The caller is required to pause the TID */ 3080227364Sadrian#if 0 3081227364Sadrian /* Pause the TID */ 3082227364Sadrian ath_tx_tid_pause(sc, atid); 3083227364Sadrian#endif 3084227364Sadrian 3085227364Sadrian /* 3086227364Sadrian * Calculate what hardware-queued frames exist based 3087227364Sadrian * on the current BAW size. Ie, what frames have been 3088227364Sadrian * added to the TX hardware queue for this TID but 3089227364Sadrian * not yet ACKed. 3090227364Sadrian */ 3091227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3092227364Sadrian /* Need the lock - fiddling with BAW */ 3093227364Sadrian while (atid->baw_head != atid->baw_tail) { 3094227364Sadrian if (atid->tx_buf[atid->baw_head]) { 3095227364Sadrian atid->incomp++; 3096227364Sadrian atid->cleanup_inprogress = 1; 3097227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 3098227364Sadrian } 3099227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 3100227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 3101227364Sadrian } 3102227364Sadrian 3103227364Sadrian /* 3104227364Sadrian * If cleanup is required, defer TID scheduling 3105227364Sadrian * until all the HW queued packets have been 3106227364Sadrian * sent. 3107227364Sadrian */ 3108227364Sadrian if (! atid->cleanup_inprogress) 3109227364Sadrian ath_tx_tid_resume(sc, atid); 3110227364Sadrian 3111227364Sadrian if (atid->cleanup_inprogress) 3112227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3113227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 3114227364Sadrian __func__, tid, atid->incomp); 3115227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3116227364Sadrian 3117227364Sadrian /* Handle completing frames and fail them */ 3118227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3119227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3120227364Sadrian ath_tx_default_comp(sc, bf, 1); 3121227364Sadrian } 3122227364Sadrian} 3123227364Sadrian 3124227364Sadrianstatic void 3125227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 3126227364Sadrian{ 3127227364Sadrian struct ieee80211_frame *wh; 3128227364Sadrian 3129227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 3130227364Sadrian /* Only update/resync if needed */ 3131227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 3132227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 3133227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3134227364Sadrian BUS_DMASYNC_PREWRITE); 3135227364Sadrian } 3136227364Sadrian sc->sc_stats.ast_tx_swretries++; 3137227364Sadrian bf->bf_state.bfs_isretried = 1; 3138227364Sadrian bf->bf_state.bfs_retries ++; 3139227364Sadrian} 3140227364Sadrian 3141227364Sadrianstatic struct ath_buf * 3142227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3143227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3144227364Sadrian{ 3145227364Sadrian struct ath_buf *nbf; 3146227364Sadrian int error; 3147227364Sadrian 3148227364Sadrian nbf = ath_buf_clone(sc, bf); 3149227364Sadrian 3150227364Sadrian#if 0 3151227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3152227364Sadrian __func__); 3153227364Sadrian#endif 3154227364Sadrian 3155227364Sadrian if (nbf == NULL) { 3156227364Sadrian /* Failed to clone */ 3157227364Sadrian device_printf(sc->sc_dev, 3158227364Sadrian "%s: failed to clone a busy buffer\n", 3159227364Sadrian __func__); 3160227364Sadrian return NULL; 3161227364Sadrian } 3162227364Sadrian 3163227364Sadrian /* Setup the dma for the new buffer */ 3164227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3165227364Sadrian if (error != 0) { 3166227364Sadrian device_printf(sc->sc_dev, 3167227364Sadrian "%s: failed to setup dma for clone\n", 3168227364Sadrian __func__); 3169227364Sadrian /* 3170227364Sadrian * Put this at the head of the list, not tail; 3171227364Sadrian * that way it doesn't interfere with the 3172227364Sadrian * busy buffer logic (which uses the tail of 3173227364Sadrian * the list.) 3174227364Sadrian */ 3175227364Sadrian ATH_TXBUF_LOCK(sc); 3176236994Sadrian ath_returnbuf_head(sc, nbf); 3177227364Sadrian ATH_TXBUF_UNLOCK(sc); 3178227364Sadrian return NULL; 3179227364Sadrian } 3180227364Sadrian 3181227398Sadrian /* Update BAW if required, before we free the original buf */ 3182227398Sadrian if (bf->bf_state.bfs_dobaw) 3183227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3184227398Sadrian 3185227364Sadrian /* Free current buffer; return the older buffer */ 3186227364Sadrian bf->bf_m = NULL; 3187227364Sadrian bf->bf_node = NULL; 3188227364Sadrian ath_freebuf(sc, bf); 3189227364Sadrian return nbf; 3190227364Sadrian} 3191227364Sadrian 3192227364Sadrian/* 3193227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3194227364Sadrian * session. 3195227364Sadrian * 3196227364Sadrian * If too many retries occur, pause the TID, wait for 3197227364Sadrian * any further retransmits (as there's no reason why 3198227364Sadrian * non-aggregate frames in an aggregate session are 3199227364Sadrian * transmitted in-order; they just have to be in-BAW) 3200227364Sadrian * and then queue a BAR. 3201227364Sadrian */ 3202227364Sadrianstatic void 3203227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3204227364Sadrian{ 3205227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3206227364Sadrian struct ath_node *an = ATH_NODE(ni); 3207227364Sadrian int tid = bf->bf_state.bfs_tid; 3208227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3209227364Sadrian struct ieee80211_tx_ampdu *tap; 3210227364Sadrian 3211227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3212227364Sadrian 3213227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3214227364Sadrian 3215227364Sadrian /* 3216227364Sadrian * If the buffer is marked as busy, we can't directly 3217227364Sadrian * reuse it. Instead, try to clone the buffer. 3218227364Sadrian * If the clone is successful, recycle the old buffer. 3219227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3220227364Sadrian * to force the next bit of code to free the buffer 3221227364Sadrian * for us. 3222227364Sadrian */ 3223227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3224227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3225227364Sadrian struct ath_buf *nbf; 3226227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3227227364Sadrian if (nbf) 3228227364Sadrian /* bf has been freed at this point */ 3229227364Sadrian bf = nbf; 3230227364Sadrian else 3231227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3232227364Sadrian } 3233227364Sadrian 3234227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3235227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3236227364Sadrian "%s: exceeded retries; seqno %d\n", 3237227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3238227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3239227364Sadrian 3240227364Sadrian /* Update BAW anyway */ 3241227364Sadrian if (bf->bf_state.bfs_dobaw) { 3242227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3243227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3244227364Sadrian device_printf(sc->sc_dev, 3245227364Sadrian "%s: wasn't added: seqno %d\n", 3246227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3247227364Sadrian } 3248227364Sadrian bf->bf_state.bfs_dobaw = 0; 3249227364Sadrian 3250233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3251233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3252227364Sadrian 3253233908Sadrian /* Send the BAR if there are no other frames waiting */ 3254233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3255233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3256227364Sadrian 3257233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3258227364Sadrian 3259227364Sadrian /* Free buffer, bf is free after this call */ 3260227364Sadrian ath_tx_default_comp(sc, bf, 0); 3261227364Sadrian return; 3262227364Sadrian } 3263227364Sadrian 3264227364Sadrian /* 3265227364Sadrian * This increments the retry counter as well as 3266227364Sadrian * sets the retry flag in the ath_buf and packet 3267227364Sadrian * body. 3268227364Sadrian */ 3269227364Sadrian ath_tx_set_retry(sc, bf); 3270227364Sadrian 3271227364Sadrian /* 3272227364Sadrian * Insert this at the head of the queue, so it's 3273227364Sadrian * retried before any current/subsequent frames. 3274227364Sadrian */ 3275227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3276227364Sadrian ath_tx_tid_sched(sc, atid); 3277233908Sadrian /* Send the BAR if there are no other frames waiting */ 3278233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3279233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3280227364Sadrian 3281227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3282227364Sadrian} 3283227364Sadrian 3284227364Sadrian/* 3285227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3286227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3287227364Sadrian * buffers. 3288227364Sadrian * 3289227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3290227364Sadrian */ 3291227364Sadrianstatic int 3292227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3293227364Sadrian ath_bufhead *bf_q) 3294227364Sadrian{ 3295227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3296227364Sadrian struct ath_node *an = ATH_NODE(ni); 3297227364Sadrian int tid = bf->bf_state.bfs_tid; 3298227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3299227364Sadrian 3300227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 3301227364Sadrian 3302227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3303227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 3304227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 3305227364Sadrian 3306227364Sadrian /* 3307227364Sadrian * If the buffer is marked as busy, we can't directly 3308227364Sadrian * reuse it. Instead, try to clone the buffer. 3309227364Sadrian * If the clone is successful, recycle the old buffer. 3310227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3311227364Sadrian * to force the next bit of code to free the buffer 3312227364Sadrian * for us. 3313227364Sadrian */ 3314227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3315227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3316227364Sadrian struct ath_buf *nbf; 3317227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3318227364Sadrian if (nbf) 3319227364Sadrian /* bf has been freed at this point */ 3320227364Sadrian bf = nbf; 3321227364Sadrian else 3322227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3323227364Sadrian } 3324227364Sadrian 3325227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3326227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3327227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3328227364Sadrian "%s: max retries: seqno %d\n", 3329227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3330227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3331227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3332227364Sadrian device_printf(sc->sc_dev, 3333227364Sadrian "%s: wasn't added: seqno %d\n", 3334227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3335227364Sadrian bf->bf_state.bfs_dobaw = 0; 3336227364Sadrian return 1; 3337227364Sadrian } 3338227364Sadrian 3339227364Sadrian ath_tx_set_retry(sc, bf); 3340227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 3341227364Sadrian 3342227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3343227364Sadrian return 0; 3344227364Sadrian} 3345227364Sadrian 3346227364Sadrian/* 3347227364Sadrian * error pkt completion for an aggregate destination 3348227364Sadrian */ 3349227364Sadrianstatic void 3350227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 3351227364Sadrian struct ath_tid *tid) 3352227364Sadrian{ 3353227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3354227364Sadrian struct ath_node *an = ATH_NODE(ni); 3355227364Sadrian struct ath_buf *bf_next, *bf; 3356227364Sadrian ath_bufhead bf_q; 3357227364Sadrian int drops = 0; 3358227364Sadrian struct ieee80211_tx_ampdu *tap; 3359227364Sadrian ath_bufhead bf_cq; 3360227364Sadrian 3361227364Sadrian TAILQ_INIT(&bf_q); 3362227364Sadrian TAILQ_INIT(&bf_cq); 3363227364Sadrian 3364227364Sadrian /* 3365227364Sadrian * Update rate control - all frames have failed. 3366227364Sadrian * 3367227364Sadrian * XXX use the length in the first frame in the series; 3368227364Sadrian * XXX just so things are consistent for now. 3369227364Sadrian */ 3370227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 3371227364Sadrian &bf_first->bf_status.ds_txstat, 3372227364Sadrian bf_first->bf_state.bfs_pktlen, 3373227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 3374227364Sadrian 3375227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3376227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3377227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 3378227364Sadrian 3379227364Sadrian /* Retry all subframes */ 3380227364Sadrian bf = bf_first; 3381227364Sadrian while (bf) { 3382227364Sadrian bf_next = bf->bf_next; 3383227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3384227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3385227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3386227364Sadrian drops++; 3387227364Sadrian bf->bf_next = NULL; 3388227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3389227364Sadrian } 3390227364Sadrian bf = bf_next; 3391227364Sadrian } 3392227364Sadrian 3393227364Sadrian /* Prepend all frames to the beginning of the queue */ 3394227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3395227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3396227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 3397227364Sadrian } 3398227364Sadrian 3399234725Sadrian /* 3400234725Sadrian * Schedule the TID to be re-tried. 3401234725Sadrian */ 3402227364Sadrian ath_tx_tid_sched(sc, tid); 3403227364Sadrian 3404227364Sadrian /* 3405227364Sadrian * send bar if we dropped any frames 3406227364Sadrian * 3407227364Sadrian * Keep the txq lock held for now, as we need to ensure 3408227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 3409227364Sadrian * in the ifnet TX context or raw TX context.) 3410227364Sadrian */ 3411227364Sadrian if (drops) { 3412233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3413233908Sadrian ath_tx_tid_bar_suspend(sc, tid); 3414227364Sadrian } 3415227364Sadrian 3416233908Sadrian /* 3417233908Sadrian * Send BAR if required 3418233908Sadrian */ 3419233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, tid)) 3420233908Sadrian ath_tx_tid_bar_tx(sc, tid); 3421233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3422233908Sadrian 3423227364Sadrian /* Complete frames which errored out */ 3424227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3425227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3426227364Sadrian ath_tx_default_comp(sc, bf, 0); 3427227364Sadrian } 3428227364Sadrian} 3429227364Sadrian 3430227364Sadrian/* 3431227364Sadrian * Handle clean-up of packets from an aggregate list. 3432227364Sadrian * 3433227364Sadrian * There's no need to update the BAW here - the session is being 3434227364Sadrian * torn down. 3435227364Sadrian */ 3436227364Sadrianstatic void 3437227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3438227364Sadrian{ 3439227364Sadrian struct ath_buf *bf, *bf_next; 3440227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3441227364Sadrian struct ath_node *an = ATH_NODE(ni); 3442227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3443227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3444227364Sadrian 3445227364Sadrian bf = bf_first; 3446227364Sadrian 3447227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3448227364Sadrian 3449227364Sadrian /* update incomp */ 3450227364Sadrian while (bf) { 3451227364Sadrian atid->incomp--; 3452227364Sadrian bf = bf->bf_next; 3453227364Sadrian } 3454227364Sadrian 3455227364Sadrian if (atid->incomp == 0) { 3456227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3457227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3458227364Sadrian __func__, tid); 3459227364Sadrian atid->cleanup_inprogress = 0; 3460227364Sadrian ath_tx_tid_resume(sc, atid); 3461227364Sadrian } 3462233908Sadrian 3463233908Sadrian /* Send BAR if required */ 3464233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3465233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3466227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3467227364Sadrian 3468227364Sadrian /* Handle frame completion */ 3469227364Sadrian while (bf) { 3470227364Sadrian bf_next = bf->bf_next; 3471227364Sadrian ath_tx_default_comp(sc, bf, 1); 3472227364Sadrian bf = bf_next; 3473227364Sadrian } 3474227364Sadrian} 3475227364Sadrian 3476227364Sadrian/* 3477227364Sadrian * Handle completion of an set of aggregate frames. 3478227364Sadrian * 3479227364Sadrian * XXX for now, simply complete each sub-frame. 3480227364Sadrian * 3481227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3482227364Sadrian * not the last descriptor in the first frame. 3483227364Sadrian */ 3484227364Sadrianstatic void 3485229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 3486229949Sadrian int fail) 3487227364Sadrian{ 3488227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3489227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3490227364Sadrian struct ath_node *an = ATH_NODE(ni); 3491227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3492227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3493227364Sadrian struct ath_tx_status ts; 3494227364Sadrian struct ieee80211_tx_ampdu *tap; 3495227364Sadrian ath_bufhead bf_q; 3496227364Sadrian ath_bufhead bf_cq; 3497227364Sadrian int seq_st, tx_ok; 3498227364Sadrian int hasba, isaggr; 3499227364Sadrian uint32_t ba[2]; 3500227364Sadrian struct ath_buf *bf, *bf_next; 3501227364Sadrian int ba_index; 3502227364Sadrian int drops = 0; 3503227364Sadrian int nframes = 0, nbad = 0, nf; 3504227364Sadrian int pktlen; 3505227364Sadrian /* XXX there's too much on the stack? */ 3506236038Sadrian struct ath_rc_series rc[ATH_RC_NUM]; 3507227364Sadrian int txseq; 3508227364Sadrian 3509227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3510227364Sadrian __func__, atid->hwq_depth); 3511227364Sadrian 3512227364Sadrian /* The TID state is kept behind the TXQ lock */ 3513227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3514227364Sadrian 3515227364Sadrian atid->hwq_depth--; 3516227364Sadrian if (atid->hwq_depth < 0) 3517227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3518227364Sadrian __func__, atid->hwq_depth); 3519227364Sadrian 3520227364Sadrian /* 3521227364Sadrian * Punt cleanup to the relevant function, not our problem now 3522227364Sadrian */ 3523227364Sadrian if (atid->cleanup_inprogress) { 3524227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3525227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3526227364Sadrian return; 3527227364Sadrian } 3528227364Sadrian 3529227364Sadrian /* 3530227364Sadrian * Take a copy; this may be needed -after- bf_first 3531227364Sadrian * has been completed and freed. 3532227364Sadrian */ 3533227364Sadrian ts = bf_first->bf_status.ds_txstat; 3534227364Sadrian /* 3535227364Sadrian * XXX for now, use the first frame in the aggregate for 3536227364Sadrian * XXX rate control completion; it's at least consistent. 3537227364Sadrian */ 3538227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3539227364Sadrian 3540227364Sadrian /* 3541235461Sadrian * Handle errors first! 3542235461Sadrian * 3543235461Sadrian * Here, handle _any_ error as a "exceeded retries" error. 3544235461Sadrian * Later on (when filtered frames are to be specially handled) 3545235461Sadrian * it'll have to be expanded. 3546227364Sadrian */ 3547235461Sadrian#if 0 3548227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3549235461Sadrian#endif 3550235461Sadrian if (ts.ts_status != 0) { 3551227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3552227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3553227364Sadrian return; 3554227364Sadrian } 3555227364Sadrian 3556227364Sadrian TAILQ_INIT(&bf_q); 3557227364Sadrian TAILQ_INIT(&bf_cq); 3558227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3559227364Sadrian 3560227364Sadrian /* 3561227364Sadrian * extract starting sequence and block-ack bitmap 3562227364Sadrian */ 3563227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3564227364Sadrian seq_st = ts.ts_seqnum; 3565227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3566227364Sadrian tx_ok = (ts.ts_status == 0); 3567227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3568227364Sadrian ba[0] = ts.ts_ba_low; 3569227364Sadrian ba[1] = ts.ts_ba_high; 3570227364Sadrian 3571227364Sadrian /* 3572227364Sadrian * Copy the TX completion status and the rate control 3573227364Sadrian * series from the first descriptor, as it may be freed 3574227364Sadrian * before the rate control code can get its grubby fingers 3575227364Sadrian * into things. 3576227364Sadrian */ 3577227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3578227364Sadrian 3579227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3580229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 3581229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3582227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3583227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3584227364Sadrian 3585227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3586227364Sadrian if (tid != ts.ts_tid) { 3587227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3588227364Sadrian __func__, tid, ts.ts_tid); 3589227364Sadrian tx_ok = 0; 3590227364Sadrian } 3591227364Sadrian 3592227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3593227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3594227364Sadrian device_printf(sc->sc_dev, 3595229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 3596229949Sadrian "seq_st=%d\n", 3597227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3598227364Sadrian /* XXX TODO: schedule an interface reset */ 3599238350Sjhb#ifdef ATH_DEBUG 3600238338Sadrian ath_printtxbuf(sc, bf_first, 3601238338Sadrian sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0); 3602238350Sjhb#endif 3603227364Sadrian } 3604227364Sadrian 3605227364Sadrian /* 3606227364Sadrian * Walk the list of frames, figure out which ones were correctly 3607227364Sadrian * sent and which weren't. 3608227364Sadrian */ 3609227364Sadrian bf = bf_first; 3610227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3611227364Sadrian 3612227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3613227364Sadrian bf_first = NULL; 3614227364Sadrian 3615227364Sadrian /* 3616227364Sadrian * Walk the list of completed frames and determine 3617227364Sadrian * which need to be completed and which need to be 3618227364Sadrian * retransmitted. 3619227364Sadrian * 3620227364Sadrian * For completed frames, the completion functions need 3621227364Sadrian * to be called at the end of this function as the last 3622227364Sadrian * node reference may free the node. 3623227364Sadrian * 3624227364Sadrian * Finally, since the TXQ lock can't be held during the 3625227364Sadrian * completion callback (to avoid lock recursion), 3626227364Sadrian * the completion calls have to be done outside of the 3627227364Sadrian * lock. 3628227364Sadrian */ 3629227364Sadrian while (bf) { 3630227364Sadrian nframes++; 3631229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 3632229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3633227364Sadrian bf_next = bf->bf_next; 3634227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3635227364Sadrian 3636227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3637227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3638227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3639227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3640227364Sadrian 3641227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3642227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 3643227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3644227364Sadrian bf->bf_state.bfs_dobaw = 0; 3645227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3646227364Sadrian device_printf(sc->sc_dev, 3647227364Sadrian "%s: wasn't added: seqno %d\n", 3648227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3649227364Sadrian bf->bf_next = NULL; 3650227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3651227364Sadrian } else { 3652227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3653227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3654227364Sadrian drops++; 3655227364Sadrian bf->bf_next = NULL; 3656227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3657227364Sadrian } 3658227364Sadrian nbad++; 3659227364Sadrian } 3660227364Sadrian bf = bf_next; 3661227364Sadrian } 3662227364Sadrian 3663227364Sadrian /* 3664227364Sadrian * Now that the BAW updates have been done, unlock 3665227364Sadrian * 3666227364Sadrian * txseq is grabbed before the lock is released so we 3667227364Sadrian * have a consistent view of what -was- in the BAW. 3668227364Sadrian * Anything after this point will not yet have been 3669227364Sadrian * TXed. 3670227364Sadrian */ 3671227364Sadrian txseq = tap->txa_start; 3672227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3673227364Sadrian 3674227364Sadrian if (nframes != nf) 3675227364Sadrian device_printf(sc->sc_dev, 3676227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3677227364Sadrian __func__, nframes, nf); 3678227364Sadrian 3679227364Sadrian /* 3680227364Sadrian * Now we know how many frames were bad, call the rate 3681227364Sadrian * control code. 3682227364Sadrian */ 3683227364Sadrian if (fail == 0) 3684229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 3685229949Sadrian nbad); 3686227364Sadrian 3687227364Sadrian /* 3688227364Sadrian * send bar if we dropped any frames 3689227364Sadrian */ 3690227364Sadrian if (drops) { 3691233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3692233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3693233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3694233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3695227364Sadrian } 3696227364Sadrian 3697234725Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3698234725Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3699234725Sadrian 3700234725Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3701234725Sadrian 3702227364Sadrian /* Prepend all frames to the beginning of the queue */ 3703227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3704227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3705227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3706227364Sadrian } 3707234725Sadrian 3708234725Sadrian /* 3709234725Sadrian * Reschedule to grab some further frames. 3710234725Sadrian */ 3711227364Sadrian ath_tx_tid_sched(sc, atid); 3712227364Sadrian 3713233908Sadrian /* 3714233908Sadrian * Send BAR if required 3715233908Sadrian */ 3716233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3717233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3718234725Sadrian 3719233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3720233908Sadrian 3721227364Sadrian /* Do deferred completion */ 3722227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3723227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3724227364Sadrian ath_tx_default_comp(sc, bf, 0); 3725227364Sadrian } 3726227364Sadrian} 3727227364Sadrian 3728227364Sadrian/* 3729227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3730227364Sadrian * session. 3731227364Sadrian * 3732227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3733227364Sadrian * ath_tx_draintxq(). 3734227364Sadrian */ 3735227364Sadrianstatic void 3736227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3737227364Sadrian{ 3738227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3739227364Sadrian struct ath_node *an = ATH_NODE(ni); 3740227364Sadrian int tid = bf->bf_state.bfs_tid; 3741227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3742227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3743227364Sadrian 3744227364Sadrian /* 3745227364Sadrian * Update rate control status here, before we possibly 3746227364Sadrian * punt to retry or cleanup. 3747227364Sadrian * 3748227364Sadrian * Do it outside of the TXQ lock. 3749227364Sadrian */ 3750233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3751227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3752227364Sadrian &bf->bf_status.ds_txstat, 3753227364Sadrian bf->bf_state.bfs_pktlen, 3754227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3755227364Sadrian 3756227364Sadrian /* 3757227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3758227364Sadrian * This unfortunately means that it's released and regrabbed 3759227364Sadrian * during retry and cleanup. That's rather inefficient. 3760227364Sadrian */ 3761227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3762227364Sadrian 3763227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3764227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3765227364Sadrian 3766229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 3767229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 3768229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 3769229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3770227364Sadrian 3771227364Sadrian atid->hwq_depth--; 3772227364Sadrian if (atid->hwq_depth < 0) 3773227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3774227364Sadrian __func__, atid->hwq_depth); 3775227364Sadrian 3776227364Sadrian /* 3777227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3778227364Sadrian * rather than handling it here. It's thus their 3779227364Sadrian * responsibility to clean up, call the completion 3780227364Sadrian * function in net80211, etc. 3781227364Sadrian */ 3782227364Sadrian if (atid->cleanup_inprogress) { 3783227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3784229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 3785229949Sadrian __func__); 3786227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3787227364Sadrian return; 3788227364Sadrian } 3789227364Sadrian 3790227364Sadrian /* 3791227364Sadrian * Don't bother with the retry check if all frames 3792227364Sadrian * are being failed (eg during queue deletion.) 3793227364Sadrian */ 3794235461Sadrian#if 0 3795227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3796235461Sadrian#endif 3797235461Sadrian if (fail == 0 && ts->ts_status != 0) { 3798227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3799229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 3800229949Sadrian __func__); 3801227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3802227364Sadrian return; 3803227364Sadrian } 3804227364Sadrian 3805227364Sadrian /* Success? Complete */ 3806227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3807227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3808227364Sadrian if (bf->bf_state.bfs_dobaw) { 3809227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3810227364Sadrian bf->bf_state.bfs_dobaw = 0; 3811227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3812227364Sadrian device_printf(sc->sc_dev, 3813227364Sadrian "%s: wasn't added: seqno %d\n", 3814227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3815227364Sadrian } 3816227364Sadrian 3817233908Sadrian /* 3818233908Sadrian * Send BAR if required 3819233908Sadrian */ 3820233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3821233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3822233908Sadrian 3823227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3824227364Sadrian 3825227364Sadrian ath_tx_default_comp(sc, bf, fail); 3826227364Sadrian /* bf is freed at this point */ 3827227364Sadrian} 3828227364Sadrian 3829227364Sadrianvoid 3830227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3831227364Sadrian{ 3832227364Sadrian if (bf->bf_state.bfs_aggr) 3833227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 3834227364Sadrian else 3835227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 3836227364Sadrian} 3837227364Sadrian 3838227364Sadrian/* 3839227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3840227364Sadrian * 3841227364Sadrian * This is the aggregate version. 3842227364Sadrian */ 3843227364Sadrianvoid 3844227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 3845227364Sadrian struct ath_tid *tid) 3846227364Sadrian{ 3847227364Sadrian struct ath_buf *bf; 3848227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3849227364Sadrian struct ieee80211_tx_ampdu *tap; 3850227364Sadrian struct ieee80211_node *ni = &an->an_node; 3851227364Sadrian ATH_AGGR_STATUS status; 3852227364Sadrian ath_bufhead bf_q; 3853227364Sadrian 3854227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 3855227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3856227364Sadrian 3857227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3858227364Sadrian 3859227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 3860227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 3861227364Sadrian __func__); 3862227364Sadrian 3863227364Sadrian for (;;) { 3864227364Sadrian status = ATH_AGGR_DONE; 3865227364Sadrian 3866227364Sadrian /* 3867227364Sadrian * If the upper layer has paused the TID, don't 3868227364Sadrian * queue any further packets. 3869227364Sadrian * 3870227364Sadrian * This can also occur from the completion task because 3871227364Sadrian * of packet loss; but as its serialised with this code, 3872227364Sadrian * it won't "appear" half way through queuing packets. 3873227364Sadrian */ 3874227364Sadrian if (tid->paused) 3875227364Sadrian break; 3876227364Sadrian 3877227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3878227364Sadrian if (bf == NULL) { 3879227364Sadrian break; 3880227364Sadrian } 3881227364Sadrian 3882227364Sadrian /* 3883227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 3884227364Sadrian * data frame), schedule it directly; continue. 3885227364Sadrian */ 3886227364Sadrian if (! bf->bf_state.bfs_dobaw) { 3887229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3888229949Sadrian "%s: non-baw packet\n", 3889227364Sadrian __func__); 3890227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3891227364Sadrian bf->bf_state.bfs_aggr = 0; 3892227364Sadrian ath_tx_do_ratelookup(sc, bf); 3893233989Sadrian ath_tx_calc_duration(sc, bf); 3894233989Sadrian ath_tx_calc_protection(sc, bf); 3895233989Sadrian ath_tx_set_rtscts(sc, bf); 3896227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3897227364Sadrian ath_tx_setds(sc, bf); 3898227364Sadrian ath_tx_chaindesclist(sc, bf); 3899227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3900227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3901227364Sadrian 3902227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 3903227364Sadrian 3904227364Sadrian /* Queue the packet; continue */ 3905227364Sadrian goto queuepkt; 3906227364Sadrian } 3907227364Sadrian 3908227364Sadrian TAILQ_INIT(&bf_q); 3909227364Sadrian 3910227364Sadrian /* 3911227364Sadrian * Do a rate control lookup on the first frame in the 3912227364Sadrian * list. The rate control code needs that to occur 3913227364Sadrian * before it can determine whether to TX. 3914227364Sadrian * It's inaccurate because the rate control code doesn't 3915227364Sadrian * really "do" aggregate lookups, so it only considers 3916227364Sadrian * the size of the first frame. 3917227364Sadrian */ 3918227364Sadrian ath_tx_do_ratelookup(sc, bf); 3919227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 3920227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 3921233989Sadrian 3922233989Sadrian ath_tx_calc_duration(sc, bf); 3923233989Sadrian ath_tx_calc_protection(sc, bf); 3924233989Sadrian 3925233989Sadrian ath_tx_set_rtscts(sc, bf); 3926227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3927227364Sadrian 3928227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 3929227364Sadrian 3930227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3931227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 3932227364Sadrian 3933227364Sadrian /* 3934227364Sadrian * No frames to be picked up - out of BAW 3935227364Sadrian */ 3936227364Sadrian if (TAILQ_EMPTY(&bf_q)) 3937227364Sadrian break; 3938227364Sadrian 3939227364Sadrian /* 3940227364Sadrian * This assumes that the descriptor list in the ath_bufhead 3941227364Sadrian * are already linked together via bf_next pointers. 3942227364Sadrian */ 3943227364Sadrian bf = TAILQ_FIRST(&bf_q); 3944227364Sadrian 3945233989Sadrian if (status == ATH_AGGR_8K_LIMITED) 3946233989Sadrian sc->sc_aggr_stats.aggr_rts_aggr_limited++; 3947233989Sadrian 3948227364Sadrian /* 3949227364Sadrian * If it's the only frame send as non-aggregate 3950227364Sadrian * assume that ath_tx_form_aggr() has checked 3951227364Sadrian * whether it's in the BAW and added it appropriately. 3952227364Sadrian */ 3953227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 3954227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3955227364Sadrian "%s: single-frame aggregate\n", __func__); 3956227364Sadrian bf->bf_state.bfs_aggr = 0; 3957227364Sadrian ath_tx_setds(sc, bf); 3958227364Sadrian ath_tx_chaindesclist(sc, bf); 3959227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3960227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3961227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 3962227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 3963227364Sadrian else 3964227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 3965227364Sadrian } else { 3966227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3967229949Sadrian "%s: multi-frame aggregate: %d frames, " 3968229949Sadrian "length %d\n", 3969227364Sadrian __func__, bf->bf_state.bfs_nframes, 3970227364Sadrian bf->bf_state.bfs_al); 3971227364Sadrian bf->bf_state.bfs_aggr = 1; 3972227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 3973227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 3974227364Sadrian 3975227364Sadrian /* 3976233989Sadrian * Calculate the duration/protection as required. 3977233989Sadrian */ 3978233989Sadrian ath_tx_calc_duration(sc, bf); 3979233989Sadrian ath_tx_calc_protection(sc, bf); 3980233989Sadrian 3981233989Sadrian /* 3982227364Sadrian * Update the rate and rtscts information based on the 3983227364Sadrian * rate decision made by the rate control code; 3984227364Sadrian * the first frame in the aggregate needs it. 3985227364Sadrian */ 3986227364Sadrian ath_tx_set_rtscts(sc, bf); 3987227364Sadrian 3988227364Sadrian /* 3989227364Sadrian * Setup the relevant descriptor fields 3990227364Sadrian * for aggregation. The first descriptor 3991227364Sadrian * already points to the rest in the chain. 3992227364Sadrian */ 3993227364Sadrian ath_tx_setds_11n(sc, bf); 3994227364Sadrian 3995227364Sadrian /* 3996227364Sadrian * setup first desc with rate and aggr info 3997227364Sadrian */ 3998227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3999227364Sadrian } 4000227364Sadrian queuepkt: 4001227364Sadrian //txq = bf->bf_state.bfs_txq; 4002227364Sadrian 4003227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 4004227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 4005227364Sadrian 4006227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 4007227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 4008227364Sadrian 4009227364Sadrian /* Punt to txq */ 4010227364Sadrian ath_tx_handoff(sc, txq, bf); 4011227364Sadrian 4012227364Sadrian /* Track outstanding buffer count to hardware */ 4013227364Sadrian /* aggregates are "one" buffer */ 4014227364Sadrian tid->hwq_depth++; 4015227364Sadrian 4016227364Sadrian /* 4017227364Sadrian * Break out if ath_tx_form_aggr() indicated 4018227364Sadrian * there can't be any further progress (eg BAW is full.) 4019227364Sadrian * Checking for an empty txq is done above. 4020227364Sadrian * 4021227364Sadrian * XXX locking on txq here? 4022227364Sadrian */ 4023227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 4024227364Sadrian status == ATH_AGGR_BAW_CLOSED) 4025227364Sadrian break; 4026227364Sadrian } 4027227364Sadrian} 4028227364Sadrian 4029227364Sadrian/* 4030227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4031227364Sadrian */ 4032227364Sadrianvoid 4033227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 4034227364Sadrian struct ath_tid *tid) 4035227364Sadrian{ 4036227364Sadrian struct ath_buf *bf; 4037227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4038227364Sadrian struct ieee80211_node *ni = &an->an_node; 4039227364Sadrian 4040227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 4041227364Sadrian __func__, an, tid->tid); 4042227364Sadrian 4043227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4044227364Sadrian 4045227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 4046227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 4047227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 4048227364Sadrian __func__, tid->tid); 4049227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 4050227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 4051227364Sadrian __func__, tid->tid); 4052227364Sadrian 4053227364Sadrian for (;;) { 4054227364Sadrian 4055227364Sadrian /* 4056227364Sadrian * If the upper layers have paused the TID, don't 4057227364Sadrian * queue any further packets. 4058227364Sadrian */ 4059227364Sadrian if (tid->paused) 4060227364Sadrian break; 4061227364Sadrian 4062227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 4063227364Sadrian if (bf == NULL) { 4064227364Sadrian break; 4065227364Sadrian } 4066227364Sadrian 4067227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 4068227364Sadrian 4069227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 4070227364Sadrian 4071227364Sadrian /* Sanity check! */ 4072227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 4073227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 4074227364Sadrian " tid %d\n", 4075227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 4076227364Sadrian } 4077227364Sadrian /* Normal completion handler */ 4078227364Sadrian bf->bf_comp = ath_tx_normal_comp; 4079227364Sadrian 4080227364Sadrian /* Program descriptors + rate control */ 4081227364Sadrian ath_tx_do_ratelookup(sc, bf); 4082233989Sadrian ath_tx_calc_duration(sc, bf); 4083233989Sadrian ath_tx_calc_protection(sc, bf); 4084233989Sadrian ath_tx_set_rtscts(sc, bf); 4085227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4086227364Sadrian ath_tx_setds(sc, bf); 4087227364Sadrian ath_tx_chaindesclist(sc, bf); 4088227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 4089227364Sadrian 4090227364Sadrian /* Track outstanding buffer count to hardware */ 4091227364Sadrian /* aggregates are "one" buffer */ 4092227364Sadrian tid->hwq_depth++; 4093227364Sadrian 4094227364Sadrian /* Punt to hardware or software txq */ 4095227364Sadrian ath_tx_handoff(sc, txq, bf); 4096227364Sadrian } 4097227364Sadrian} 4098227364Sadrian 4099227364Sadrian/* 4100227364Sadrian * Schedule some packets to the given hardware queue. 4101227364Sadrian * 4102227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 4103227364Sadrian * with queued traffic) and attempts to schedule traffic 4104227364Sadrian * from them. 4105227364Sadrian * 4106227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 4107227364Sadrian * added to the end of the queue after some frames have been 4108227364Sadrian * scheduled. 4109227364Sadrian */ 4110227364Sadrianvoid 4111227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 4112227364Sadrian{ 4113227364Sadrian struct ath_tid *tid, *next, *last; 4114227364Sadrian 4115227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4116227364Sadrian 4117227364Sadrian /* 4118227364Sadrian * Don't schedule if the hardware queue is busy. 4119227364Sadrian * This (hopefully) gives some more time to aggregate 4120227364Sadrian * some packets in the aggregation queue. 4121227364Sadrian */ 4122227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4123227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 4124227364Sadrian return; 4125227364Sadrian } 4126227364Sadrian 4127227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 4128227364Sadrian 4129227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 4130227364Sadrian /* 4131227364Sadrian * Suspend paused queues here; they'll be resumed 4132227364Sadrian * once the addba completes or times out. 4133227364Sadrian */ 4134227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 4135227364Sadrian __func__, tid->tid, tid->paused); 4136227364Sadrian ath_tx_tid_unsched(sc, tid); 4137227364Sadrian if (tid->paused) { 4138227364Sadrian continue; 4139227364Sadrian } 4140227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 4141227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 4142227364Sadrian else 4143227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 4144227364Sadrian 4145227364Sadrian /* Not empty? Re-schedule */ 4146227364Sadrian if (tid->axq_depth != 0) 4147227364Sadrian ath_tx_tid_sched(sc, tid); 4148227364Sadrian 4149227364Sadrian /* Give the software queue time to aggregate more packets */ 4150227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4151227364Sadrian break; 4152227364Sadrian } 4153227364Sadrian 4154227364Sadrian /* 4155227364Sadrian * If this was the last entry on the original list, stop. 4156227364Sadrian * Otherwise nodes that have been rescheduled onto the end 4157227364Sadrian * of the TID FIFO list will just keep being rescheduled. 4158227364Sadrian */ 4159227364Sadrian if (tid == last) 4160227364Sadrian break; 4161227364Sadrian } 4162227364Sadrian} 4163227364Sadrian 4164227364Sadrian/* 4165227364Sadrian * TX addba handling 4166227364Sadrian */ 4167227364Sadrian 4168227364Sadrian/* 4169227364Sadrian * Return net80211 TID struct pointer, or NULL for none 4170227364Sadrian */ 4171227364Sadrianstruct ieee80211_tx_ampdu * 4172227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 4173227364Sadrian{ 4174227364Sadrian struct ieee80211_node *ni = &an->an_node; 4175227364Sadrian struct ieee80211_tx_ampdu *tap; 4176227364Sadrian 4177227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4178227364Sadrian return NULL; 4179227364Sadrian 4180234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 4181227364Sadrian return tap; 4182227364Sadrian} 4183227364Sadrian 4184227364Sadrian/* 4185227364Sadrian * Is AMPDU-TX running? 4186227364Sadrian */ 4187227364Sadrianstatic int 4188227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 4189227364Sadrian{ 4190227364Sadrian struct ieee80211_tx_ampdu *tap; 4191227364Sadrian 4192227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4193227364Sadrian return 0; 4194227364Sadrian 4195227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4196227364Sadrian if (tap == NULL) 4197227364Sadrian return 0; /* Not valid; default to not running */ 4198227364Sadrian 4199227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 4200227364Sadrian} 4201227364Sadrian 4202227364Sadrian/* 4203227364Sadrian * Is AMPDU-TX negotiation pending? 4204227364Sadrian */ 4205227364Sadrianstatic int 4206227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 4207227364Sadrian{ 4208227364Sadrian struct ieee80211_tx_ampdu *tap; 4209227364Sadrian 4210227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4211227364Sadrian return 0; 4212227364Sadrian 4213227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4214227364Sadrian if (tap == NULL) 4215227364Sadrian return 0; /* Not valid; default to not pending */ 4216227364Sadrian 4217227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 4218227364Sadrian} 4219227364Sadrian 4220227364Sadrian/* 4221227364Sadrian * Is AMPDU-TX pending for the given TID? 4222227364Sadrian */ 4223227364Sadrian 4224227364Sadrian 4225227364Sadrian/* 4226227364Sadrian * Method to handle sending an ADDBA request. 4227227364Sadrian * 4228227364Sadrian * We tap this so the relevant flags can be set to pause the TID 4229227364Sadrian * whilst waiting for the response. 4230227364Sadrian * 4231227364Sadrian * XXX there's no timeout handler we can override? 4232227364Sadrian */ 4233227364Sadrianint 4234227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4235227364Sadrian int dialogtoken, int baparamset, int batimeout) 4236227364Sadrian{ 4237227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4238234324Sadrian int tid = tap->txa_tid; 4239227364Sadrian struct ath_node *an = ATH_NODE(ni); 4240227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4241227364Sadrian 4242227364Sadrian /* 4243227364Sadrian * XXX danger Will Robinson! 4244227364Sadrian * 4245227364Sadrian * Although the taskqueue may be running and scheduling some more 4246227364Sadrian * packets, these should all be _before_ the addba sequence number. 4247227364Sadrian * However, net80211 will keep self-assigning sequence numbers 4248227364Sadrian * until addba has been negotiated. 4249227364Sadrian * 4250227364Sadrian * In the past, these packets would be "paused" (which still works 4251227364Sadrian * fine, as they're being scheduled to the driver in the same 4252227364Sadrian * serialised method which is calling the addba request routine) 4253227364Sadrian * and when the aggregation session begins, they'll be dequeued 4254227364Sadrian * as aggregate packets and added to the BAW. However, now there's 4255227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 4256227364Sadrian * packets. Thus they never get included in the BAW tracking and 4257227364Sadrian * this can cause the initial burst of packets after the addba 4258227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 4259227364Sadrian * 4260227364Sadrian * The "eventual" solution should be to tag these packets with 4261227364Sadrian * dobaw. Although net80211 has given us a sequence number, 4262227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 4263227364Sadrian * fall within it. 4264227364Sadrian */ 4265235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4266235774Sadrian /* 4267235774Sadrian * This is a bit annoying. Until net80211 HT code inherits some 4268235774Sadrian * (any) locking, we may have this called in parallel BUT only 4269235774Sadrian * one response/timeout will be called. Grr. 4270235774Sadrian */ 4271235774Sadrian if (atid->addba_tx_pending == 0) { 4272235774Sadrian ath_tx_tid_pause(sc, atid); 4273235774Sadrian atid->addba_tx_pending = 1; 4274235774Sadrian } 4275235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4276227364Sadrian 4277227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4278227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 4279227364Sadrian __func__, dialogtoken, baparamset, batimeout); 4280227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4281227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4282227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4283227364Sadrian 4284227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 4285227364Sadrian batimeout); 4286227364Sadrian} 4287227364Sadrian 4288227364Sadrian/* 4289227364Sadrian * Handle an ADDBA response. 4290227364Sadrian * 4291227364Sadrian * We unpause the queue so TX'ing can resume. 4292227364Sadrian * 4293227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 4294227364Sadrian * aggregate or not) so the BAW is updated. 4295227364Sadrian * 4296227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 4297227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 4298227364Sadrian * edge won't match the ni->ni_txseq. 4299227364Sadrian * 4300227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 4301227364Sadrian * ni->ni_txseq. 4302227364Sadrian * 4303227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 4304227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 4305227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 4306227364Sadrian * window. 4307227364Sadrian */ 4308227364Sadrianint 4309227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4310227364Sadrian int status, int code, int batimeout) 4311227364Sadrian{ 4312227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4313234324Sadrian int tid = tap->txa_tid; 4314227364Sadrian struct ath_node *an = ATH_NODE(ni); 4315227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4316227364Sadrian int r; 4317227364Sadrian 4318227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4319227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 4320227364Sadrian status, code, batimeout); 4321227364Sadrian 4322227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4323227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4324227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4325227364Sadrian 4326227364Sadrian /* 4327227364Sadrian * Call this first, so the interface flags get updated 4328227364Sadrian * before the TID is unpaused. Otherwise a race condition 4329227364Sadrian * exists where the unpaused TID still doesn't yet have 4330227364Sadrian * IEEE80211_AGGR_RUNNING set. 4331227364Sadrian */ 4332227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 4333227364Sadrian 4334227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4335235774Sadrian atid->addba_tx_pending = 0; 4336227364Sadrian /* 4337227364Sadrian * XXX dirty! 4338227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 4339227364Sadrian * Read above for more information. 4340227364Sadrian */ 4341227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 4342227364Sadrian ath_tx_tid_resume(sc, atid); 4343227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4344227364Sadrian return r; 4345227364Sadrian} 4346227364Sadrian 4347227364Sadrian 4348227364Sadrian/* 4349227364Sadrian * Stop ADDBA on a queue. 4350237593Sadrian * 4351237593Sadrian * This can be called whilst BAR TX is currently active on the queue, 4352237593Sadrian * so make sure this is unblocked before continuing. 4353227364Sadrian */ 4354227364Sadrianvoid 4355227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 4356227364Sadrian{ 4357227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4358234324Sadrian int tid = tap->txa_tid; 4359227364Sadrian struct ath_node *an = ATH_NODE(ni); 4360227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4361227364Sadrian 4362227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 4363227364Sadrian 4364237593Sadrian /* 4365237593Sadrian * Pause TID traffic early, so there aren't any races 4366237593Sadrian * Unblock the pending BAR held traffic, if it's currently paused. 4367237593Sadrian */ 4368235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4369227364Sadrian ath_tx_tid_pause(sc, atid); 4370237593Sadrian if (atid->bar_wait) { 4371237593Sadrian /* 4372237593Sadrian * bar_unsuspend() expects bar_tx == 1, as it should be 4373237593Sadrian * called from the TX completion path. This quietens 4374237593Sadrian * the warning. It's cleared for us anyway. 4375237593Sadrian */ 4376237593Sadrian atid->bar_tx = 1; 4377237593Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4378237593Sadrian } 4379235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4380227364Sadrian 4381227364Sadrian /* There's no need to hold the TXQ lock here */ 4382227364Sadrian sc->sc_addba_stop(ni, tap); 4383227364Sadrian 4384227364Sadrian /* 4385235749Sadrian * ath_tx_tid_cleanup will resume the TID if possible, otherwise 4386227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 4387227364Sadrian * things have been cleaned up. 4388227364Sadrian */ 4389235749Sadrian ath_tx_tid_cleanup(sc, an, tid); 4390227364Sadrian} 4391227364Sadrian 4392227364Sadrian/* 4393227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 4394227364Sadrian * it simply tears down the aggregation session. Ew. 4395227364Sadrian * 4396227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 4397227364Sadrian * ic->ic_addba_stop(). 4398227364Sadrian * 4399227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 4400227364Sadrian * XXX BAR TX success or failure should be better handled! 4401227364Sadrian */ 4402227364Sadrianvoid 4403227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4404227364Sadrian int status) 4405227364Sadrian{ 4406227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4407234324Sadrian int tid = tap->txa_tid; 4408227364Sadrian struct ath_node *an = ATH_NODE(ni); 4409227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4410227364Sadrian int attempts = tap->txa_attempts; 4411227364Sadrian 4412235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 4413235676Sadrian "%s: called; tap=%p, atid=%p, txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n", 4414235491Sadrian __func__, 4415235676Sadrian tap, 4416235676Sadrian atid, 4417235676Sadrian tap->txa_tid, 4418235676Sadrian atid->tid, 4419235491Sadrian status, 4420235491Sadrian attempts); 4421227364Sadrian 4422227364Sadrian /* Note: This may update the BAW details */ 4423227364Sadrian sc->sc_bar_response(ni, tap, status); 4424227364Sadrian 4425227364Sadrian /* Unpause the TID */ 4426227364Sadrian /* 4427227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 4428227364Sadrian * XXX to a non-aggregate session. So we must unpause the 4429227364Sadrian * XXX TID here or it'll never be done. 4430227364Sadrian */ 4431227364Sadrian if (status == 0 || attempts == 50) { 4432227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4433233908Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4434227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4435227364Sadrian } 4436227364Sadrian} 4437227364Sadrian 4438227364Sadrian/* 4439227364Sadrian * This is called whenever the pending ADDBA request times out. 4440227364Sadrian * Unpause and reschedule the TID. 4441227364Sadrian */ 4442227364Sadrianvoid 4443227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 4444227364Sadrian struct ieee80211_tx_ampdu *tap) 4445227364Sadrian{ 4446227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4447234324Sadrian int tid = tap->txa_tid; 4448227364Sadrian struct ath_node *an = ATH_NODE(ni); 4449227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4450227364Sadrian 4451227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4452227364Sadrian "%s: called; resuming\n", __func__); 4453227364Sadrian 4454235774Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4455235774Sadrian atid->addba_tx_pending = 0; 4456235774Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4457235774Sadrian 4458227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 4459227364Sadrian sc->sc_addba_response_timeout(ni, tap); 4460227364Sadrian 4461227364Sadrian /* Unpause the TID; which reschedules it */ 4462227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4463227364Sadrian ath_tx_tid_resume(sc, atid); 4464227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4465227364Sadrian} 4466238710Sadrian 4467238710Sadrianstatic int 4468238710Sadrianath_legacy_dma_txsetup(struct ath_softc *sc) 4469238710Sadrian{ 4470238710Sadrian 4471238710Sadrian /* nothing new needed */ 4472238710Sadrian return (0); 4473238710Sadrian} 4474238710Sadrian 4475238710Sadrianstatic int 4476238710Sadrianath_legacy_dma_txteardown(struct ath_softc *sc) 4477238710Sadrian{ 4478238710Sadrian 4479238710Sadrian /* nothing new needed */ 4480238710Sadrian return (0); 4481238710Sadrian} 4482238710Sadrian 4483238710Sadrianvoid 4484238710Sadrianath_xmit_setup_legacy(struct ath_softc *sc) 4485238710Sadrian{ 4486238710Sadrian 4487238710Sadrian sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup; 4488238710Sadrian sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown; 4489238710Sadrian} 4490