if_ath_tx.c revision 238930
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 238930 2012-07-31 02:28:32Z 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 */ 642238930Sadrianstatic void 643238930Sadrianath_legacy_tx_dma_restart(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 671238930Sadrianath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq, 672238930Sadrian struct ath_buf *bf) 673227364Sadrian{ 674227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 675227364Sadrian 676227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 677227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 678227364Sadrian else 679227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 680227364Sadrian} 681227364Sadrian 682218154Sadrianstatic int 683218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 684229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 685229949Sadrian int *keyix) 686218154Sadrian{ 687233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 688233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 689233330Sadrian __func__, 690233330Sadrian *hdrlen, 691233330Sadrian *pktlen, 692233330Sadrian isfrag, 693233330Sadrian iswep, 694233330Sadrian m0); 695233330Sadrian 696218154Sadrian if (iswep) { 697218154Sadrian const struct ieee80211_cipher *cip; 698218154Sadrian struct ieee80211_key *k; 699218154Sadrian 700218154Sadrian /* 701218154Sadrian * Construct the 802.11 header+trailer for an encrypted 702218154Sadrian * frame. The only reason this can fail is because of an 703218154Sadrian * unknown or unsupported cipher/key type. 704218154Sadrian */ 705218154Sadrian k = ieee80211_crypto_encap(ni, m0); 706218154Sadrian if (k == NULL) { 707218154Sadrian /* 708218154Sadrian * This can happen when the key is yanked after the 709218154Sadrian * frame was queued. Just discard the frame; the 710218154Sadrian * 802.11 layer counts failures and provides 711218154Sadrian * debugging/diagnostics. 712218154Sadrian */ 713229949Sadrian return (0); 714218154Sadrian } 715218154Sadrian /* 716218154Sadrian * Adjust the packet + header lengths for the crypto 717218154Sadrian * additions and calculate the h/w key index. When 718218154Sadrian * a s/w mic is done the frame will have had any mic 719218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 720218154Sadrian * account for it. Otherwise we need to add it to the 721218154Sadrian * packet length. 722218154Sadrian */ 723218154Sadrian cip = k->wk_cipher; 724218154Sadrian (*hdrlen) += cip->ic_header; 725218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 726218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 727218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 728218154Sadrian (*pktlen) += cip->ic_miclen; 729218154Sadrian (*keyix) = k->wk_keyix; 730218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 731218154Sadrian /* 732218154Sadrian * Use station key cache slot, if assigned. 733218154Sadrian */ 734218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 735218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 736218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 737218154Sadrian } else 738218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 739218154Sadrian 740229949Sadrian return (1); 741218154Sadrian} 742218154Sadrian 743233989Sadrian/* 744233989Sadrian * Calculate whether interoperability protection is required for 745233989Sadrian * this frame. 746233989Sadrian * 747233989Sadrian * This requires the rate control information be filled in, 748233989Sadrian * as the protection requirement depends upon the current 749233989Sadrian * operating mode / PHY. 750233989Sadrian */ 751233989Sadrianstatic void 752233989Sadrianath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf) 753233989Sadrian{ 754233989Sadrian struct ieee80211_frame *wh; 755233989Sadrian uint8_t rix; 756233989Sadrian uint16_t flags; 757233989Sadrian int shortPreamble; 758233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 759233989Sadrian struct ifnet *ifp = sc->sc_ifp; 760233989Sadrian struct ieee80211com *ic = ifp->if_l2com; 761233989Sadrian 762233989Sadrian flags = bf->bf_state.bfs_txflags; 763233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 764233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 765233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 766233989Sadrian 767233989Sadrian /* 768233989Sadrian * If 802.11g protection is enabled, determine whether 769233989Sadrian * to use RTS/CTS or just CTS. Note that this is only 770233989Sadrian * done for OFDM unicast frames. 771233989Sadrian */ 772233989Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 773233989Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 774233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 775233989Sadrian bf->bf_state.bfs_doprot = 1; 776233989Sadrian /* XXX fragments must use CCK rates w/ protection */ 777233989Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 778233989Sadrian flags |= HAL_TXDESC_RTSENA; 779233989Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 780233989Sadrian flags |= HAL_TXDESC_CTSENA; 781233989Sadrian } 782233989Sadrian /* 783233989Sadrian * For frags it would be desirable to use the 784233989Sadrian * highest CCK rate for RTS/CTS. But stations 785233989Sadrian * farther away may detect it at a lower CCK rate 786233989Sadrian * so use the configured protection rate instead 787233989Sadrian * (for now). 788233989Sadrian */ 789233989Sadrian sc->sc_stats.ast_tx_protect++; 790233989Sadrian } 791233989Sadrian 792233989Sadrian /* 793233989Sadrian * If 11n protection is enabled and it's a HT frame, 794233989Sadrian * enable RTS. 795233989Sadrian * 796233989Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 797233989Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 798233989Sadrian * XXX indicates it's not a HT pure environment? 799233989Sadrian */ 800233989Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 801233989Sadrian rt->info[rix].phy == IEEE80211_T_HT && 802233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 803233989Sadrian flags |= HAL_TXDESC_RTSENA; 804233989Sadrian sc->sc_stats.ast_tx_htprotect++; 805233989Sadrian } 806233989Sadrian bf->bf_state.bfs_txflags = flags; 807233989Sadrian} 808233989Sadrian 809233989Sadrian/* 810233989Sadrian * Update the frame duration given the currently selected rate. 811233989Sadrian * 812233989Sadrian * This also updates the frame duration value, so it will require 813233989Sadrian * a DMA flush. 814233989Sadrian */ 815233989Sadrianstatic void 816233989Sadrianath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf) 817233989Sadrian{ 818233989Sadrian struct ieee80211_frame *wh; 819233989Sadrian uint8_t rix; 820233989Sadrian uint16_t flags; 821233989Sadrian int shortPreamble; 822233989Sadrian struct ath_hal *ah = sc->sc_ah; 823233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 824233989Sadrian int isfrag = bf->bf_m->m_flags & M_FRAG; 825233989Sadrian 826233989Sadrian flags = bf->bf_state.bfs_txflags; 827233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 828233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 829233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 830233989Sadrian 831233989Sadrian /* 832233989Sadrian * Calculate duration. This logically belongs in the 802.11 833233989Sadrian * layer but it lacks sufficient information to calculate it. 834233989Sadrian */ 835233989Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 836233989Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 837233989Sadrian u_int16_t dur; 838233989Sadrian if (shortPreamble) 839233989Sadrian dur = rt->info[rix].spAckDuration; 840233989Sadrian else 841233989Sadrian dur = rt->info[rix].lpAckDuration; 842233989Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 843233989Sadrian dur += dur; /* additional SIFS+ACK */ 844233989Sadrian KASSERT(bf->bf_m->m_nextpkt != NULL, ("no fragment")); 845233989Sadrian /* 846233989Sadrian * Include the size of next fragment so NAV is 847233989Sadrian * updated properly. The last fragment uses only 848233989Sadrian * the ACK duration 849233989Sadrian */ 850233989Sadrian dur += ath_hal_computetxtime(ah, rt, 851233989Sadrian bf->bf_m->m_nextpkt->m_pkthdr.len, 852233989Sadrian rix, shortPreamble); 853233989Sadrian } 854233989Sadrian if (isfrag) { 855233989Sadrian /* 856233989Sadrian * Force hardware to use computed duration for next 857233989Sadrian * fragment by disabling multi-rate retry which updates 858233989Sadrian * duration based on the multi-rate duration table. 859233989Sadrian */ 860233989Sadrian bf->bf_state.bfs_ismrr = 0; 861233989Sadrian bf->bf_state.bfs_try0 = ATH_TXMGTTRY; 862233989Sadrian /* XXX update bfs_rc[0].try? */ 863233989Sadrian } 864233989Sadrian 865233989Sadrian /* Update the duration field itself */ 866233989Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 867233989Sadrian } 868233989Sadrian} 869233989Sadrian 870218932Sadrianstatic uint8_t 871218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 872227364Sadrian int cix, int shortPreamble) 873218157Sadrian{ 874218932Sadrian uint8_t ctsrate; 875218932Sadrian 876218157Sadrian /* 877218157Sadrian * CTS transmit rate is derived from the transmit rate 878218157Sadrian * by looking in the h/w rate table. We must also factor 879218157Sadrian * in whether or not a short preamble is to be used. 880218157Sadrian */ 881218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 882218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 883218932Sadrian ctsrate = rt->info[cix].rateCode; 884218932Sadrian 885218932Sadrian /* XXX this should only matter for legacy rates */ 886218932Sadrian if (shortPreamble) 887218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 888218932Sadrian 889229949Sadrian return (ctsrate); 890218932Sadrian} 891218932Sadrian 892218932Sadrian/* 893218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 894218932Sadrian */ 895218932Sadrianstatic int 896218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 897218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 898218932Sadrian int flags) 899218932Sadrian{ 900218932Sadrian int ctsduration = 0; 901218932Sadrian 902218932Sadrian /* This mustn't be called for HT modes */ 903218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 904218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 905218932Sadrian __func__, rt->info[cix].rateCode); 906229949Sadrian return (-1); 907218932Sadrian } 908218932Sadrian 909218157Sadrian /* 910218157Sadrian * Compute the transmit duration based on the frame 911218157Sadrian * size and the size of an ACK frame. We call into the 912218157Sadrian * HAL to do the computation since it depends on the 913218157Sadrian * characteristics of the actual PHY being used. 914218157Sadrian * 915218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 916218157Sadrian * use the precalculated ACK durations. 917218157Sadrian */ 918218157Sadrian if (shortPreamble) { 919218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 920218932Sadrian ctsduration += rt->info[cix].spAckDuration; 921218932Sadrian ctsduration += ath_hal_computetxtime(ah, 922218157Sadrian rt, pktlen, rix, AH_TRUE); 923218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 924218932Sadrian ctsduration += rt->info[rix].spAckDuration; 925218157Sadrian } else { 926218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 927218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 928218932Sadrian ctsduration += ath_hal_computetxtime(ah, 929218157Sadrian rt, pktlen, rix, AH_FALSE); 930218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 931218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 932218157Sadrian } 933218932Sadrian 934229949Sadrian return (ctsduration); 935218157Sadrian} 936218157Sadrian 937227364Sadrian/* 938227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 939227364Sadrian * values. 940227364Sadrian * 941227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 942227364Sadrian * and cts duration must be re-calculated. 943227364Sadrian * 944227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 945227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 946227364Sadrian * 947227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 948227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 949227364Sadrian */ 950227364Sadrianstatic void 951227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 952218065Sadrian{ 953227364Sadrian uint16_t ctsduration = 0; 954227364Sadrian uint8_t ctsrate = 0; 955227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 956227364Sadrian uint8_t cix = 0; 957227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 958227364Sadrian 959227364Sadrian /* 960227364Sadrian * No RTS/CTS enabled? Don't bother. 961227364Sadrian */ 962233966Sadrian if ((bf->bf_state.bfs_txflags & 963227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 964227364Sadrian /* XXX is this really needed? */ 965227364Sadrian bf->bf_state.bfs_ctsrate = 0; 966227364Sadrian bf->bf_state.bfs_ctsduration = 0; 967227364Sadrian return; 968227364Sadrian } 969227364Sadrian 970227364Sadrian /* 971227364Sadrian * If protection is enabled, use the protection rix control 972227364Sadrian * rate. Otherwise use the rate0 control rate. 973227364Sadrian */ 974227364Sadrian if (bf->bf_state.bfs_doprot) 975227364Sadrian rix = sc->sc_protrix; 976227364Sadrian else 977227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 978227364Sadrian 979227364Sadrian /* 980227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 981227364Sadrian * use it. 982227364Sadrian */ 983227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 984227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 985227364Sadrian else 986227364Sadrian /* Control rate from above */ 987227364Sadrian cix = rt->info[rix].controlRate; 988227364Sadrian 989227364Sadrian /* Calculate the rtscts rate for the given cix */ 990227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 991227364Sadrian bf->bf_state.bfs_shpream); 992227364Sadrian 993227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 994227364Sadrian if (! ath_tx_is_11n(sc)) 995227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 996227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 997233966Sadrian rt, bf->bf_state.bfs_txflags); 998227364Sadrian 999227364Sadrian /* Squirrel away in ath_buf */ 1000227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 1001227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 1002227364Sadrian 1003227364Sadrian /* 1004227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 1005227364Sadrian * XXX TODO: only for pre-11n NICs. 1006227364Sadrian */ 1007227364Sadrian bf->bf_state.bfs_ismrr = 0; 1008227364Sadrian bf->bf_state.bfs_try0 = 1009227364Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 1010227364Sadrian} 1011227364Sadrian 1012227364Sadrian/* 1013227364Sadrian * Setup the descriptor chain for a normal or fast-frame 1014227364Sadrian * frame. 1015227364Sadrian */ 1016227364Sadrianstatic void 1017227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 1018227364Sadrian{ 1019227364Sadrian struct ath_desc *ds = bf->bf_desc; 1020227364Sadrian struct ath_hal *ah = sc->sc_ah; 1021227364Sadrian 1022227364Sadrian ath_hal_setuptxdesc(ah, ds 1023227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 1024227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 1025227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 1026227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 1027227364Sadrian , bf->bf_state.bfs_txrate0 1028227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 1029227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 1030227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 1031233966Sadrian , bf->bf_state.bfs_txflags /* flags */ 1032227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 1033227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 1034227364Sadrian ); 1035227364Sadrian 1036227364Sadrian /* 1037227364Sadrian * This will be overriden when the descriptor chain is written. 1038227364Sadrian */ 1039227364Sadrian bf->bf_lastds = ds; 1040227364Sadrian bf->bf_last = bf; 1041227364Sadrian 1042227364Sadrian /* XXX TODO: Setup descriptor chain */ 1043227364Sadrian} 1044227364Sadrian 1045227364Sadrian/* 1046227364Sadrian * Do a rate lookup. 1047227364Sadrian * 1048227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 1049227364Sadrian * Non-data frames and raw frames don't require it. 1050227364Sadrian * 1051227364Sadrian * This populates the primary and MRR entries; MRR values are 1052227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 1053227364Sadrian * pre-11n chipsets. 1054227364Sadrian * 1055227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 1056227364Sadrian * as they may depend upon the rate chosen. 1057227364Sadrian */ 1058227364Sadrianstatic void 1059227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 1060227364Sadrian{ 1061227364Sadrian uint8_t rate, rix; 1062227364Sadrian int try0; 1063227364Sadrian 1064227364Sadrian if (! bf->bf_state.bfs_doratelookup) 1065227364Sadrian return; 1066227364Sadrian 1067227364Sadrian /* Get rid of any previous state */ 1068227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1069227364Sadrian 1070227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 1071227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 1072227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 1073227364Sadrian 1074227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 1075227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1076227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 1077227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1078227364Sadrian 1079227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 1080227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 1081227364Sadrian bf->bf_state.bfs_rc); 1082227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 1083227364Sadrian 1084227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 1085227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 1086227364Sadrian bf->bf_state.bfs_try0 = try0; 1087227364Sadrian bf->bf_state.bfs_txrate0 = rate; 1088227364Sadrian} 1089227364Sadrian 1090227364Sadrian/* 1091227364Sadrian * Set the rate control fields in the given descriptor based on 1092227364Sadrian * the bf_state fields and node state. 1093227364Sadrian * 1094227364Sadrian * The bfs fields should already be set with the relevant rate 1095227364Sadrian * control information, including whether MRR is to be enabled. 1096227364Sadrian * 1097227364Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 1098227364Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 1099227364Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 1100227364Sadrian * unconditionally for 11n chips. These require the 11n rate 1101227364Sadrian * scenario to be set if MCS rates are enabled, so it's easier 1102227364Sadrian * to just always call it. The caller can then only set rates 2, 3 1103227364Sadrian * and 4 if multi-rate retry is needed. 1104227364Sadrian */ 1105227364Sadrianstatic void 1106227364Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 1107227364Sadrian struct ath_buf *bf) 1108227364Sadrian{ 1109227364Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 1110227364Sadrian 1111227364Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 1112227364Sadrian if (! bf->bf_state.bfs_ismrr) 1113227364Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 1114227364Sadrian 1115227364Sadrian /* 1116227364Sadrian * Always call - that way a retried descriptor will 1117227364Sadrian * have the MRR fields overwritten. 1118227364Sadrian * 1119227364Sadrian * XXX TODO: see if this is really needed - setting up 1120227364Sadrian * the first descriptor should set the MRR fields to 0 1121227364Sadrian * for us anyway. 1122227364Sadrian */ 1123227364Sadrian if (ath_tx_is_11n(sc)) { 1124227364Sadrian ath_buf_set_rate(sc, ni, bf); 1125227364Sadrian } else { 1126227364Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 1127227364Sadrian , rc[1].ratecode, rc[1].tries 1128227364Sadrian , rc[2].ratecode, rc[2].tries 1129227364Sadrian , rc[3].ratecode, rc[3].tries 1130227364Sadrian ); 1131227364Sadrian } 1132227364Sadrian} 1133227364Sadrian 1134227364Sadrian/* 1135227364Sadrian * Transmit the given frame to the hardware. 1136227364Sadrian * 1137227364Sadrian * The frame must already be setup; rate control must already have 1138227364Sadrian * been done. 1139227364Sadrian * 1140227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 1141227364Sadrian * it for this long when not doing software aggregation), later on 1142227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 1143227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 1144227364Sadrian */ 1145227364Sadrianstatic void 1146227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 1147227364Sadrian struct ath_buf *bf) 1148227364Sadrian{ 1149227364Sadrian 1150227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1151227364Sadrian 1152227364Sadrian /* Setup the descriptor before handoff */ 1153227364Sadrian ath_tx_do_ratelookup(sc, bf); 1154233989Sadrian ath_tx_calc_duration(sc, bf); 1155233989Sadrian ath_tx_calc_protection(sc, bf); 1156233989Sadrian ath_tx_set_rtscts(sc, bf); 1157227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1158227364Sadrian ath_tx_setds(sc, bf); 1159227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1160227364Sadrian ath_tx_chaindesclist(sc, bf); 1161227364Sadrian 1162227364Sadrian /* Hand off to hardware */ 1163227364Sadrian ath_tx_handoff(sc, txq, bf); 1164227364Sadrian} 1165227364Sadrian 1166227364Sadrian 1167227364Sadrian 1168227364Sadrianstatic int 1169227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1170234009Sadrian struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq) 1171227364Sadrian{ 1172218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1173218065Sadrian struct ath_hal *ah = sc->sc_ah; 1174218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1175218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1176218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1177218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1178227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1179227364Sadrian u_int8_t rix = 0, txrate = 0; 1180218065Sadrian struct ath_desc *ds; 1181218065Sadrian struct ieee80211_frame *wh; 1182227364Sadrian u_int subtype, flags; 1183218065Sadrian HAL_PKT_TYPE atype; 1184218065Sadrian const HAL_RATE_TABLE *rt; 1185218065Sadrian HAL_BOOL shortPreamble; 1186218065Sadrian struct ath_node *an; 1187218065Sadrian u_int pri; 1188218065Sadrian 1189236880Sadrian /* 1190236880Sadrian * To ensure that both sequence numbers and the CCMP PN handling 1191236880Sadrian * is "correct", make sure that the relevant TID queue is locked. 1192236880Sadrian * Otherwise the CCMP PN and seqno may appear out of order, causing 1193236880Sadrian * re-ordered frames to have out of order CCMP PN's, resulting 1194236880Sadrian * in many, many frame drops. 1195236880Sadrian */ 1196236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1197236880Sadrian 1198218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1199218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1200218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1201218065Sadrian isfrag = m0->m_flags & M_FRAG; 1202218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1203218065Sadrian /* 1204218065Sadrian * Packet length must not include any 1205218065Sadrian * pad bytes; deduct them here. 1206218065Sadrian */ 1207218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1208218065Sadrian 1209218154Sadrian /* Handle encryption twiddling if needed */ 1210227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1211227364Sadrian &pktlen, &keyix)) { 1212218154Sadrian ath_freetx(m0); 1213218154Sadrian return EIO; 1214218154Sadrian } 1215218065Sadrian 1216218154Sadrian /* packet header may have moved, reset our local pointer */ 1217218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1218218065Sadrian 1219218065Sadrian pktlen += IEEE80211_CRC_LEN; 1220218065Sadrian 1221218065Sadrian /* 1222218065Sadrian * Load the DMA map so any coalescing is done. This 1223218065Sadrian * also calculates the number of descriptors we need. 1224218065Sadrian */ 1225218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1226218065Sadrian if (error != 0) 1227218065Sadrian return error; 1228218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1229218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1230218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1231218065Sadrian 1232218065Sadrian /* setup descriptors */ 1233218065Sadrian ds = bf->bf_desc; 1234218065Sadrian rt = sc->sc_currates; 1235218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1236218065Sadrian 1237218065Sadrian /* 1238218065Sadrian * NB: the 802.11 layer marks whether or not we should 1239218065Sadrian * use short preamble based on the current mode and 1240218065Sadrian * negotiated parameters. 1241218065Sadrian */ 1242218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1243218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1244218065Sadrian shortPreamble = AH_TRUE; 1245218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1246218065Sadrian } else { 1247218065Sadrian shortPreamble = AH_FALSE; 1248218065Sadrian } 1249218065Sadrian 1250218065Sadrian an = ATH_NODE(ni); 1251218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1252218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1253218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1254218065Sadrian /* XXX use txparams instead of fixed values */ 1255218065Sadrian /* 1256218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1257218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1258218065Sadrian */ 1259218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1260218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1261218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1262218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1263218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1264218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1265218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1266218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1267218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1268218065Sadrian else 1269218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1270218065Sadrian rix = an->an_mgmtrix; 1271218065Sadrian txrate = rt->info[rix].rateCode; 1272218065Sadrian if (shortPreamble) 1273218065Sadrian txrate |= rt->info[rix].shortPreamble; 1274218065Sadrian try0 = ATH_TXMGTTRY; 1275218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1276218065Sadrian break; 1277218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1278218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1279218065Sadrian rix = an->an_mgmtrix; 1280218065Sadrian txrate = rt->info[rix].rateCode; 1281218065Sadrian if (shortPreamble) 1282218065Sadrian txrate |= rt->info[rix].shortPreamble; 1283218065Sadrian try0 = ATH_TXMGTTRY; 1284218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1285218065Sadrian break; 1286218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1287218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1288218065Sadrian /* 1289218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1290218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1291218065Sadrian * the rate control module for the rate to use. 1292218065Sadrian */ 1293218065Sadrian if (ismcast) { 1294218065Sadrian rix = an->an_mcastrix; 1295218065Sadrian txrate = rt->info[rix].rateCode; 1296218065Sadrian if (shortPreamble) 1297218065Sadrian txrate |= rt->info[rix].shortPreamble; 1298218065Sadrian try0 = 1; 1299218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1300218065Sadrian /* XXX? maybe always use long preamble? */ 1301218065Sadrian rix = an->an_mgmtrix; 1302218065Sadrian txrate = rt->info[rix].rateCode; 1303218065Sadrian if (shortPreamble) 1304218065Sadrian txrate |= rt->info[rix].shortPreamble; 1305218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1306218065Sadrian } else { 1307227364Sadrian /* 1308227364Sadrian * Do rate lookup on each TX, rather than using 1309227364Sadrian * the hard-coded TX information decided here. 1310227364Sadrian */ 1311227364Sadrian ismrr = 1; 1312227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1313218065Sadrian } 1314218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1315218065Sadrian flags |= HAL_TXDESC_NOACK; 1316218065Sadrian break; 1317218065Sadrian default: 1318218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1319218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1320218065Sadrian /* XXX statistic */ 1321218065Sadrian ath_freetx(m0); 1322218065Sadrian return EIO; 1323218065Sadrian } 1324218065Sadrian 1325237041Sadrian /* 1326237041Sadrian * There are two known scenarios where the frame AC doesn't match 1327237041Sadrian * what the destination TXQ is. 1328237041Sadrian * 1329237041Sadrian * + non-QoS frames (eg management?) that the net80211 stack has 1330237041Sadrian * assigned a higher AC to, but since it's a non-QoS TID, it's 1331237041Sadrian * being thrown into TID 16. TID 16 gets the AC_BE queue. 1332237041Sadrian * It's quite possible that management frames should just be 1333237041Sadrian * direct dispatched to hardware rather than go via the software 1334237041Sadrian * queue; that should be investigated in the future. There are 1335237041Sadrian * some specific scenarios where this doesn't make sense, mostly 1336237041Sadrian * surrounding ADDBA request/response - hence why that is special 1337237041Sadrian * cased. 1338237041Sadrian * 1339237041Sadrian * + Multicast frames going into the VAP mcast queue. That shows up 1340237041Sadrian * as "TXQ 11". 1341237041Sadrian * 1342237041Sadrian * This driver should eventually support separate TID and TXQ locking, 1343237041Sadrian * allowing for arbitrary AC frames to appear on arbitrary software 1344237041Sadrian * queues, being queued to the "correct" hardware queue when needed. 1345237041Sadrian */ 1346237041Sadrian#if 0 1347235750Sadrian if (txq != sc->sc_ac2q[pri]) { 1348235750Sadrian device_printf(sc->sc_dev, 1349235750Sadrian "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n", 1350235750Sadrian __func__, 1351235750Sadrian txq, 1352235750Sadrian txq->axq_qnum, 1353235750Sadrian pri, 1354235750Sadrian sc->sc_ac2q[pri], 1355235750Sadrian sc->sc_ac2q[pri]->axq_qnum); 1356235750Sadrian } 1357237041Sadrian#endif 1358235750Sadrian 1359218065Sadrian /* 1360218065Sadrian * Calculate miscellaneous flags. 1361218065Sadrian */ 1362218065Sadrian if (ismcast) { 1363218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1364218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1365218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1366218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1367218065Sadrian sc->sc_stats.ast_tx_rts++; 1368218065Sadrian } 1369218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1370218065Sadrian sc->sc_stats.ast_tx_noack++; 1371218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1372218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1373218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1374218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1375218065Sadrian sc->sc_stats.ast_tdma_ack++; 1376218065Sadrian ath_freetx(m0); 1377218065Sadrian return EIO; 1378218065Sadrian } 1379218065Sadrian#endif 1380218065Sadrian 1381218065Sadrian /* 1382227364Sadrian * Determine if a tx interrupt should be generated for 1383227364Sadrian * this descriptor. We take a tx interrupt to reap 1384227364Sadrian * descriptors when the h/w hits an EOL condition or 1385227364Sadrian * when the descriptor is specifically marked to generate 1386227364Sadrian * an interrupt. We periodically mark descriptors in this 1387227364Sadrian * way to insure timely replenishing of the supply needed 1388227364Sadrian * for sending frames. Defering interrupts reduces system 1389227364Sadrian * load and potentially allows more concurrent work to be 1390227364Sadrian * done but if done to aggressively can cause senders to 1391227364Sadrian * backup. 1392227364Sadrian * 1393227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1394227364Sadrian * dynamically through sysctl. 1395218065Sadrian */ 1396227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1397227364Sadrian txq->axq_intrcnt = 0; 1398227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1399227364Sadrian flags |= HAL_TXDESC_INTREQ; 1400227364Sadrian txq->axq_intrcnt = 0; 1401227364Sadrian } 1402218932Sadrian 1403227364Sadrian /* This point forward is actual TX bits */ 1404218065Sadrian 1405218065Sadrian /* 1406218065Sadrian * At this point we are committed to sending the frame 1407218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1408218065Sadrian * case this frame is part of frag chain. 1409218065Sadrian */ 1410218065Sadrian m0->m_nextpkt = NULL; 1411218065Sadrian 1412218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1413218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1414218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1415218065Sadrian 1416218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1417218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1418218065Sadrian 1419218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1420218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1421218065Sadrian if (iswep) 1422218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1423218065Sadrian if (isfrag) 1424218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1425218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1426218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1427218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1428218065Sadrian 1429218065Sadrian ieee80211_radiotap_tx(vap, m0); 1430218065Sadrian } 1431218065Sadrian 1432227364Sadrian /* Blank the legacy rate array */ 1433227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1434227364Sadrian 1435218065Sadrian /* 1436227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1437227364Sadrian * the rate scenario. 1438227364Sadrian */ 1439227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1440227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1441227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1442227364Sadrian 1443227364Sadrian /* Store the decided rate index values away */ 1444227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1445227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1446227364Sadrian bf->bf_state.bfs_atype = atype; 1447227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1448227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1449227364Sadrian bf->bf_state.bfs_try0 = try0; 1450227364Sadrian bf->bf_state.bfs_keyix = keyix; 1451227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1452233966Sadrian bf->bf_state.bfs_txflags = flags; 1453227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1454227364Sadrian 1455227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1456227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1457227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1458227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1459227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1460227364Sadrian 1461227364Sadrian return 0; 1462227364Sadrian} 1463227364Sadrian 1464227364Sadrian/* 1465227364Sadrian * Direct-dispatch the current frame to the hardware. 1466227364Sadrian * 1467227364Sadrian * This can be called by the net80211 code. 1468227364Sadrian * 1469227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1470227364Sadrian * XXX aggregate scheduler so its serialised? 1471227364Sadrian */ 1472227364Sadrianint 1473227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1474227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1475227364Sadrian{ 1476227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1477227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1478232764Sadrian int r = 0; 1479227364Sadrian u_int pri; 1480227364Sadrian int tid; 1481227364Sadrian struct ath_txq *txq; 1482227364Sadrian int ismcast; 1483227364Sadrian const struct ieee80211_frame *wh; 1484227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1485236872Sadrian ieee80211_seq seqno; 1486227364Sadrian uint8_t type, subtype; 1487227364Sadrian 1488227364Sadrian /* 1489227364Sadrian * Determine the target hardware queue. 1490218065Sadrian * 1491234009Sadrian * For multicast frames, the txq gets overridden appropriately 1492234009Sadrian * depending upon the state of PS. 1493227364Sadrian * 1494227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1495227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1496227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1497227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1498227364Sadrian * having a node TID queued to multiple hardware TXQs. 1499227364Sadrian * This may change in the future but would require some locking 1500227364Sadrian * fudgery. 1501218065Sadrian */ 1502227364Sadrian pri = ath_tx_getac(sc, m0); 1503227364Sadrian tid = ath_tx_gettid(sc, m0); 1504218065Sadrian 1505227364Sadrian txq = sc->sc_ac2q[pri]; 1506227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1507227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1508227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1509227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1510227364Sadrian 1511232764Sadrian /* 1512232764Sadrian * Enforce how deep the multicast queue can grow. 1513232764Sadrian * 1514232764Sadrian * XXX duplicated in ath_raw_xmit(). 1515232764Sadrian */ 1516232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1517232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1518232764Sadrian 1519232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1520232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1521232764Sadrian r = ENOBUFS; 1522232764Sadrian } 1523232764Sadrian 1524232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1525232764Sadrian 1526232764Sadrian if (r != 0) { 1527232764Sadrian m_freem(m0); 1528232764Sadrian return r; 1529232764Sadrian } 1530232764Sadrian } 1531232764Sadrian 1532227364Sadrian /* A-MPDU TX */ 1533227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1534227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1535227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1536227364Sadrian 1537236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1538236872Sadrian __func__, tid, pri, is_ampdu); 1539227364Sadrian 1540232753Sadrian /* 1541234009Sadrian * When servicing one or more stations in power-save mode 1542234009Sadrian * (or) if there is some mcast data waiting on the mcast 1543234009Sadrian * queue (to prevent out of order delivery) multicast frames 1544234009Sadrian * must be bufferd until after the beacon. 1545234009Sadrian * 1546234009Sadrian * TODO: we should lock the mcastq before we check the length. 1547232753Sadrian */ 1548234009Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) 1549227364Sadrian txq = &avp->av_mcastq; 1550227364Sadrian 1551227364Sadrian /* Do the generic frame setup */ 1552227364Sadrian /* XXX should just bzero the bf_state? */ 1553227364Sadrian bf->bf_state.bfs_dobaw = 0; 1554227364Sadrian 1555236880Sadrian /* 1556236880Sadrian * Acquire the TXQ lock early, so both the encap and seqno 1557236880Sadrian * are allocated together. 1558236880Sadrian */ 1559236880Sadrian ATH_TXQ_LOCK(txq); 1560236880Sadrian 1561227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1562236880Sadrian /* 1563236880Sadrian * Don't do it whilst pending; the net80211 layer still 1564236880Sadrian * assigns them. 1565236880Sadrian */ 1566227364Sadrian if (is_ampdu_tx) { 1567227364Sadrian /* 1568227364Sadrian * Always call; this function will 1569227364Sadrian * handle making sure that null data frames 1570227364Sadrian * don't get a sequence number from the current 1571227364Sadrian * TID and thus mess with the BAW. 1572227364Sadrian */ 1573236872Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1574236874Sadrian 1575236874Sadrian /* 1576236874Sadrian * Don't add QoS NULL frames to the BAW. 1577236874Sadrian */ 1578236872Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1579236872Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1580227364Sadrian bf->bf_state.bfs_dobaw = 1; 1581227364Sadrian } 1582218240Sadrian } 1583218240Sadrian 1584218065Sadrian /* 1585227364Sadrian * If needed, the sequence number has been assigned. 1586227364Sadrian * Squirrel it away somewhere easy to get to. 1587218065Sadrian */ 1588236872Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1589227364Sadrian 1590227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1591227364Sadrian if (is_ampdu_pending) 1592227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1593227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1594227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1595227364Sadrian 1596227364Sadrian /* This also sets up the DMA map */ 1597234009Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0, txq); 1598227364Sadrian 1599227364Sadrian if (r != 0) 1600236880Sadrian goto done; 1601227364Sadrian 1602227364Sadrian /* At this point m0 could have changed! */ 1603227364Sadrian m0 = bf->bf_m; 1604227364Sadrian 1605227364Sadrian#if 1 1606218065Sadrian /* 1607227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1608227364Sadrian * destination hardware queue. Don't bother software 1609227364Sadrian * queuing it. 1610218065Sadrian */ 1611227364Sadrian /* 1612227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1613227364Sadrian * destination hardware queue. Don't bother software 1614227364Sadrian * queuing it, as the TID will now be paused. 1615227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1616227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1617227364Sadrian * It queues directly to hardware because the TID is paused 1618227364Sadrian * at this point (and won't be unpaused until the BAR has 1619227364Sadrian * either been TXed successfully or max retries has been 1620227364Sadrian * reached.) 1621227364Sadrian */ 1622227364Sadrian if (txq == &avp->av_mcastq) { 1623235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1624233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1625227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1626227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1627227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1628235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1629227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1630227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1631227364Sadrian } else { 1632227364Sadrian /* add to software queue */ 1633235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1634233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1635227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1636227364Sadrian } 1637227364Sadrian#else 1638227364Sadrian /* 1639227364Sadrian * For now, since there's no software queue, 1640227364Sadrian * direct-dispatch to the hardware. 1641227364Sadrian */ 1642227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1643236880Sadrian#endif 1644236880Sadriandone: 1645227364Sadrian ATH_TXQ_UNLOCK(txq); 1646218065Sadrian 1647218065Sadrian return 0; 1648218065Sadrian} 1649218065Sadrian 1650218065Sadrianstatic int 1651218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1652218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1653218065Sadrian const struct ieee80211_bpf_params *params) 1654218065Sadrian{ 1655218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1656218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1657218065Sadrian struct ath_hal *ah = sc->sc_ah; 1658218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1659218065Sadrian int error, ismcast, ismrr; 1660218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1661227364Sadrian u_int8_t rix, txrate; 1662218065Sadrian struct ieee80211_frame *wh; 1663227364Sadrian u_int flags; 1664218065Sadrian HAL_PKT_TYPE atype; 1665218065Sadrian const HAL_RATE_TABLE *rt; 1666218065Sadrian struct ath_desc *ds; 1667218065Sadrian u_int pri; 1668227364Sadrian int o_tid = -1; 1669227364Sadrian int do_override; 1670218065Sadrian 1671218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1672218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1673218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1674218065Sadrian /* 1675218065Sadrian * Packet length must not include any 1676218065Sadrian * pad bytes; deduct them here. 1677218065Sadrian */ 1678218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1679218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1680218065Sadrian 1681227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1682227364Sadrian __func__, ismcast); 1683227364Sadrian 1684236880Sadrian pri = params->ibp_pri & 3; 1685236880Sadrian /* Override pri if the frame isn't a QoS one */ 1686236880Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1687236880Sadrian pri = ath_tx_getac(sc, m0); 1688236880Sadrian 1689236880Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1690236880Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1691236880Sadrian 1692236880Sadrian /* Map ADDBA to the correct priority */ 1693236880Sadrian if (do_override) { 1694236880Sadrian#if 0 1695236880Sadrian device_printf(sc->sc_dev, 1696236880Sadrian "%s: overriding tid %d pri %d -> %d\n", 1697236880Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1698236880Sadrian#endif 1699236880Sadrian pri = TID_TO_WME_AC(o_tid); 1700236880Sadrian } 1701236880Sadrian 1702236880Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1703236880Sadrian 1704218154Sadrian /* Handle encryption twiddling if needed */ 1705227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1706227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1707227364Sadrian &hdrlen, &pktlen, &keyix)) { 1708218154Sadrian ath_freetx(m0); 1709218154Sadrian return EIO; 1710218154Sadrian } 1711218154Sadrian /* packet header may have moved, reset our local pointer */ 1712218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1713218065Sadrian 1714227364Sadrian /* Do the generic frame setup */ 1715227364Sadrian /* XXX should just bzero the bf_state? */ 1716227364Sadrian bf->bf_state.bfs_dobaw = 0; 1717227364Sadrian 1718218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1719218065Sadrian if (error != 0) 1720218065Sadrian return error; 1721218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1722218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1723218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1724218065Sadrian 1725218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1726218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1727218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1728218065Sadrian flags |= HAL_TXDESC_RTSENA; 1729227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1730227364Sadrian /* XXX assume 11g/11n protection? */ 1731227364Sadrian bf->bf_state.bfs_doprot = 1; 1732218065Sadrian flags |= HAL_TXDESC_CTSENA; 1733227364Sadrian } 1734218065Sadrian /* XXX leave ismcast to injector? */ 1735218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1736218065Sadrian flags |= HAL_TXDESC_NOACK; 1737218065Sadrian 1738218065Sadrian rt = sc->sc_currates; 1739218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1740218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1741218065Sadrian txrate = rt->info[rix].rateCode; 1742218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1743218065Sadrian txrate |= rt->info[rix].shortPreamble; 1744218065Sadrian sc->sc_txrix = rix; 1745218065Sadrian try0 = params->ibp_try0; 1746218065Sadrian ismrr = (params->ibp_try1 != 0); 1747218065Sadrian txantenna = params->ibp_pri >> 2; 1748218065Sadrian if (txantenna == 0) /* XXX? */ 1749218065Sadrian txantenna = sc->sc_txantenna; 1750218157Sadrian 1751227364Sadrian /* 1752227364Sadrian * Since ctsrate is fixed, store it away for later 1753227364Sadrian * use when the descriptor fields are being set. 1754227364Sadrian */ 1755227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1756227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1757218157Sadrian 1758218065Sadrian /* 1759218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1760218065Sadrian * set the sequence number, duration, etc. 1761218065Sadrian */ 1762218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1763218065Sadrian 1764218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1765218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1766218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1767218065Sadrian 1768218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1769218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1770218065Sadrian 1771218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1772218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1773218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1774218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1775218065Sadrian if (m0->m_flags & M_FRAG) 1776218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1777218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1778218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1779218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1780218065Sadrian 1781218065Sadrian ieee80211_radiotap_tx(vap, m0); 1782218065Sadrian } 1783218065Sadrian 1784218065Sadrian /* 1785218065Sadrian * Formulate first tx descriptor with tx controls. 1786218065Sadrian */ 1787218065Sadrian ds = bf->bf_desc; 1788218065Sadrian /* XXX check return value? */ 1789227364Sadrian 1790227364Sadrian /* Store the decided rate index values away */ 1791227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1792227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1793227364Sadrian bf->bf_state.bfs_atype = atype; 1794227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1795227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1796227364Sadrian bf->bf_state.bfs_try0 = try0; 1797227364Sadrian bf->bf_state.bfs_keyix = keyix; 1798227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1799233966Sadrian bf->bf_state.bfs_txflags = flags; 1800227364Sadrian bf->bf_state.bfs_shpream = 1801227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1802218065Sadrian 1803227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1804227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1805227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1806227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1807218240Sadrian 1808227364Sadrian /* Blank the legacy rate array */ 1809227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1810218240Sadrian 1811227364Sadrian bf->bf_state.bfs_rc[0].rix = 1812227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1813227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1814227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1815227364Sadrian 1816227364Sadrian if (ismrr) { 1817227364Sadrian int rix; 1818227364Sadrian 1819227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1820227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1821227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1822227364Sadrian 1823227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1824227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1825227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1826227364Sadrian 1827227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1828227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1829227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1830218065Sadrian } 1831227364Sadrian /* 1832227364Sadrian * All the required rate control decisions have been made; 1833227364Sadrian * fill in the rc flags. 1834227364Sadrian */ 1835227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1836218065Sadrian 1837227364Sadrian /* NB: no buffered multicast in power save support */ 1838227364Sadrian 1839227364Sadrian /* 1840227364Sadrian * If we're overiding the ADDBA destination, dump directly 1841227364Sadrian * into the hardware queue, right after any pending 1842227364Sadrian * frames to that node are. 1843227364Sadrian */ 1844227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1845227364Sadrian __func__, do_override); 1846227364Sadrian 1847227364Sadrian if (do_override) { 1848227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1849227364Sadrian } else { 1850227364Sadrian /* Queue to software queue */ 1851227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1852227364Sadrian } 1853236880Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1854227364Sadrian 1855218065Sadrian return 0; 1856218065Sadrian} 1857218065Sadrian 1858227364Sadrian/* 1859227364Sadrian * Send a raw frame. 1860227364Sadrian * 1861227364Sadrian * This can be called by net80211. 1862227364Sadrian */ 1863218065Sadrianint 1864218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1865218065Sadrian const struct ieee80211_bpf_params *params) 1866218065Sadrian{ 1867218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1868218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1869218065Sadrian struct ath_softc *sc = ifp->if_softc; 1870218065Sadrian struct ath_buf *bf; 1871232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1872232764Sadrian int error = 0; 1873218065Sadrian 1874227651Sadrian ATH_PCU_LOCK(sc); 1875227651Sadrian if (sc->sc_inreset_cnt > 0) { 1876227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 1877227651Sadrian __func__); 1878227651Sadrian error = EIO; 1879227651Sadrian ATH_PCU_UNLOCK(sc); 1880227651Sadrian goto bad0; 1881227651Sadrian } 1882227651Sadrian sc->sc_txstart_cnt++; 1883227651Sadrian ATH_PCU_UNLOCK(sc); 1884227651Sadrian 1885218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 1886218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 1887218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 1888218065Sadrian "!running" : "invalid"); 1889218065Sadrian m_freem(m); 1890218065Sadrian error = ENETDOWN; 1891218065Sadrian goto bad; 1892218065Sadrian } 1893232764Sadrian 1894218065Sadrian /* 1895232764Sadrian * Enforce how deep the multicast queue can grow. 1896232764Sadrian * 1897232764Sadrian * XXX duplicated in ath_tx_start(). 1898232764Sadrian */ 1899232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1900232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1901232764Sadrian 1902232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1903232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1904232764Sadrian error = ENOBUFS; 1905232764Sadrian } 1906232764Sadrian 1907232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1908232764Sadrian 1909232764Sadrian if (error != 0) { 1910232764Sadrian m_freem(m); 1911232764Sadrian goto bad; 1912232764Sadrian } 1913232764Sadrian } 1914232764Sadrian 1915232764Sadrian /* 1916218065Sadrian * Grab a TX buffer and associated resources. 1917218065Sadrian */ 1918237000Sadrian bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 1919218065Sadrian if (bf == NULL) { 1920218065Sadrian sc->sc_stats.ast_tx_nobuf++; 1921218065Sadrian m_freem(m); 1922218065Sadrian error = ENOBUFS; 1923218065Sadrian goto bad; 1924218065Sadrian } 1925218065Sadrian 1926218065Sadrian if (params == NULL) { 1927218065Sadrian /* 1928218065Sadrian * Legacy path; interpret frame contents to decide 1929218065Sadrian * precisely how to send the frame. 1930218065Sadrian */ 1931218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 1932218065Sadrian error = EIO; /* XXX */ 1933218065Sadrian goto bad2; 1934218065Sadrian } 1935218065Sadrian } else { 1936218065Sadrian /* 1937218065Sadrian * Caller supplied explicit parameters to use in 1938218065Sadrian * sending the frame. 1939218065Sadrian */ 1940218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 1941218065Sadrian error = EIO; /* XXX */ 1942218065Sadrian goto bad2; 1943218065Sadrian } 1944218065Sadrian } 1945218065Sadrian sc->sc_wd_timer = 5; 1946218065Sadrian ifp->if_opackets++; 1947218065Sadrian sc->sc_stats.ast_tx_raw++; 1948218065Sadrian 1949227651Sadrian ATH_PCU_LOCK(sc); 1950227651Sadrian sc->sc_txstart_cnt--; 1951227651Sadrian ATH_PCU_UNLOCK(sc); 1952227651Sadrian 1953218065Sadrian return 0; 1954218065Sadrianbad2: 1955218065Sadrian ATH_TXBUF_LOCK(sc); 1956236993Sadrian ath_returnbuf_head(sc, bf); 1957218065Sadrian ATH_TXBUF_UNLOCK(sc); 1958218065Sadrianbad: 1959227651Sadrian ATH_PCU_LOCK(sc); 1960227651Sadrian sc->sc_txstart_cnt--; 1961227651Sadrian ATH_PCU_UNLOCK(sc); 1962227651Sadrianbad0: 1963218065Sadrian ifp->if_oerrors++; 1964218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 1965218065Sadrian ieee80211_free_node(ni); 1966227651Sadrian 1967218065Sadrian return error; 1968218065Sadrian} 1969227364Sadrian 1970227364Sadrian/* Some helper functions */ 1971227364Sadrian 1972227364Sadrian/* 1973227364Sadrian * ADDBA (and potentially others) need to be placed in the same 1974227364Sadrian * hardware queue as the TID/node it's relating to. This is so 1975227364Sadrian * it goes out after any pending non-aggregate frames to the 1976227364Sadrian * same node/TID. 1977227364Sadrian * 1978227364Sadrian * If this isn't done, the ADDBA can go out before the frames 1979227364Sadrian * queued in hardware. Even though these frames have a sequence 1980227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 1981227364Sadrian * no frames whose sequence numbers are after the ADDBA should 1982227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 1983227364Sadrian * will simply drop them as being out of the BAW. 1984227364Sadrian * 1985227364Sadrian * The frames can't be appended to the TID software queue - it'll 1986227364Sadrian * never be sent out. So these frames have to be directly 1987227364Sadrian * dispatched to the hardware, rather than queued in software. 1988227364Sadrian * So if this function returns true, the TXQ has to be 1989227364Sadrian * overridden and it has to be directly dispatched. 1990227364Sadrian * 1991227364Sadrian * It's a dirty hack, but someone's gotta do it. 1992227364Sadrian */ 1993227364Sadrian 1994227364Sadrian/* 1995227364Sadrian * XXX doesn't belong here! 1996227364Sadrian */ 1997227364Sadrianstatic int 1998227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 1999227364Sadrian{ 2000227364Sadrian /* Type: Management frame? */ 2001227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 2002227364Sadrian IEEE80211_FC0_TYPE_MGT) 2003227364Sadrian return 0; 2004227364Sadrian 2005227364Sadrian /* Subtype: Action frame? */ 2006227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 2007227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 2008227364Sadrian return 0; 2009227364Sadrian 2010227364Sadrian return 1; 2011227364Sadrian} 2012227364Sadrian 2013227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 2014227364Sadrian/* 2015227364Sadrian * Return an alternate TID for ADDBA request frames. 2016227364Sadrian * 2017227364Sadrian * Yes, this likely should be done in the net80211 layer. 2018227364Sadrian */ 2019227364Sadrianstatic int 2020227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 2021227364Sadrian struct ieee80211_node *ni, 2022227364Sadrian struct mbuf *m0, int *tid) 2023227364Sadrian{ 2024227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 2025227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 2026227364Sadrian uint8_t *frm; 2027227364Sadrian uint16_t baparamset; 2028227364Sadrian 2029227364Sadrian /* Not action frame? Bail */ 2030227364Sadrian if (! ieee80211_is_action(wh)) 2031227364Sadrian return 0; 2032227364Sadrian 2033227364Sadrian /* XXX Not needed for frames we send? */ 2034227364Sadrian#if 0 2035227364Sadrian /* Correct length? */ 2036227364Sadrian if (! ieee80211_parse_action(ni, m)) 2037227364Sadrian return 0; 2038227364Sadrian#endif 2039227364Sadrian 2040227364Sadrian /* Extract out action frame */ 2041227364Sadrian frm = (u_int8_t *)&wh[1]; 2042227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 2043227364Sadrian 2044227364Sadrian /* Not ADDBA? Bail */ 2045227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 2046227364Sadrian return 0; 2047227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 2048227364Sadrian return 0; 2049227364Sadrian 2050227364Sadrian /* Extract TID, return it */ 2051227364Sadrian baparamset = le16toh(ia->rq_baparamset); 2052227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 2053227364Sadrian 2054227364Sadrian return 1; 2055227364Sadrian} 2056227364Sadrian#undef MS 2057227364Sadrian 2058227364Sadrian/* Per-node software queue operations */ 2059227364Sadrian 2060227364Sadrian/* 2061227364Sadrian * Add the current packet to the given BAW. 2062227364Sadrian * It is assumed that the current packet 2063227364Sadrian * 2064227364Sadrian * + fits inside the BAW; 2065227364Sadrian * + already has had a sequence number allocated. 2066227364Sadrian * 2067227364Sadrian * Since the BAW status may be modified by both the ath task and 2068227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2069227364Sadrian */ 2070227364Sadrianvoid 2071227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 2072227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 2073227364Sadrian{ 2074227364Sadrian int index, cindex; 2075227364Sadrian struct ieee80211_tx_ampdu *tap; 2076227364Sadrian 2077227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2078236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2079227364Sadrian 2080227364Sadrian if (bf->bf_state.bfs_isretried) 2081227364Sadrian return; 2082227364Sadrian 2083236886Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2084236886Sadrian 2085236880Sadrian if (! bf->bf_state.bfs_dobaw) { 2086236880Sadrian device_printf(sc->sc_dev, 2087236880Sadrian "%s: dobaw=0, seqno=%d, window %d:%d\n", 2088236880Sadrian __func__, 2089236880Sadrian SEQNO(bf->bf_state.bfs_seqno), 2090236880Sadrian tap->txa_start, 2091236880Sadrian tap->txa_wnd); 2092236880Sadrian } 2093236880Sadrian 2094227364Sadrian if (bf->bf_state.bfs_addedbaw) 2095227364Sadrian device_printf(sc->sc_dev, 2096236872Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 2097229949Sadrian "baw head=%d tail=%d\n", 2098236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2099229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2100229949Sadrian tid->baw_tail); 2101227364Sadrian 2102227364Sadrian /* 2103236880Sadrian * Verify that the given sequence number is not outside of the 2104236880Sadrian * BAW. Complain loudly if that's the case. 2105236880Sadrian */ 2106236880Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2107236880Sadrian SEQNO(bf->bf_state.bfs_seqno))) { 2108236880Sadrian device_printf(sc->sc_dev, 2109236880Sadrian "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; " 2110236880Sadrian "baw head=%d tail=%d\n", 2111236880Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2112236880Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2113236880Sadrian tid->baw_tail); 2114236880Sadrian } 2115236880Sadrian 2116236880Sadrian /* 2117227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2118227364Sadrian * the txa state contains the current baw start. 2119227364Sadrian */ 2120227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2121227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2122227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2123236872Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2124229949Sadrian "baw head=%d tail=%d\n", 2125236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2126229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2127229949Sadrian tid->baw_tail); 2128227364Sadrian 2129227364Sadrian 2130227364Sadrian#if 0 2131227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2132227364Sadrian#endif 2133227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2134227364Sadrian device_printf(sc->sc_dev, 2135227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2136227364Sadrian "head=%d, tail=%d)\n", 2137227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2138227364Sadrian device_printf(sc->sc_dev, 2139227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2140227364Sadrian __func__, 2141227364Sadrian tid->tx_buf[cindex], 2142227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2143227364Sadrian bf, 2144227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2145227364Sadrian ); 2146227364Sadrian } 2147227364Sadrian tid->tx_buf[cindex] = bf; 2148227364Sadrian 2149229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2150229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2151227364Sadrian tid->baw_tail = cindex; 2152227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2153227364Sadrian } 2154227364Sadrian} 2155227364Sadrian 2156227364Sadrian/* 2157227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2158227398Sadrian * 2159227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2160227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2161227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2162227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2163227398Sadrian * tracking array to maintain consistency. 2164227398Sadrian */ 2165227398Sadrianstatic void 2166227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2167227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2168227398Sadrian{ 2169227398Sadrian int index, cindex; 2170227398Sadrian struct ieee80211_tx_ampdu *tap; 2171227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2172227398Sadrian 2173227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2174236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2175227398Sadrian 2176227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2177227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2178227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2179227398Sadrian 2180227398Sadrian /* 2181227398Sadrian * Just warn for now; if it happens then we should find out 2182227398Sadrian * about it. It's highly likely the aggregation session will 2183227398Sadrian * soon hang. 2184227398Sadrian */ 2185227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2186227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2187227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2188227398Sadrian __func__); 2189227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2190227398Sadrian __func__, 2191227398Sadrian old_bf->bf_state.bfs_seqno, 2192227398Sadrian new_bf->bf_state.bfs_seqno); 2193227398Sadrian } 2194227398Sadrian 2195227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2196227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2197227398Sadrian " has m BA session may hang.\n", 2198227398Sadrian __func__); 2199227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2200227398Sadrian __func__, 2201227398Sadrian old_bf, new_bf); 2202227398Sadrian } 2203227398Sadrian 2204227398Sadrian tid->tx_buf[cindex] = new_bf; 2205227398Sadrian} 2206227398Sadrian 2207227398Sadrian/* 2208227364Sadrian * seq_start - left edge of BAW 2209227364Sadrian * seq_next - current/next sequence number to allocate 2210227364Sadrian * 2211227364Sadrian * Since the BAW status may be modified by both the ath task and 2212227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2213227364Sadrian */ 2214227364Sadrianstatic void 2215227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2216227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2217227364Sadrian{ 2218227364Sadrian int index, cindex; 2219227364Sadrian struct ieee80211_tx_ampdu *tap; 2220227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2221227364Sadrian 2222227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2223236879Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2224227364Sadrian 2225227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2226227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2227227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2228227364Sadrian 2229227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2230236872Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2231229949Sadrian "baw head=%d, tail=%d\n", 2232236872Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2233227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2234227364Sadrian 2235227364Sadrian /* 2236227364Sadrian * If this occurs then we have a big problem - something else 2237227364Sadrian * has slid tap->txa_start along without updating the BAW 2238227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2239227364Sadrian * completely busted. 2240227364Sadrian * 2241227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2242227364Sadrian * it's quite possible that a cloned buffer is making its way 2243227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2244227364Sadrian */ 2245227364Sadrian if (tid->tx_buf[cindex] != bf) { 2246227364Sadrian device_printf(sc->sc_dev, 2247227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2248227364Sadrian __func__, 2249227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2250227364Sadrian tid->tx_buf[cindex], 2251227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2252227364Sadrian } 2253227364Sadrian 2254227364Sadrian tid->tx_buf[cindex] = NULL; 2255227364Sadrian 2256229949Sadrian while (tid->baw_head != tid->baw_tail && 2257229949Sadrian !tid->tx_buf[tid->baw_head]) { 2258227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2259227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2260227364Sadrian } 2261229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2262229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2263227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2264227364Sadrian} 2265227364Sadrian 2266227364Sadrian/* 2267227364Sadrian * Mark the current node/TID as ready to TX. 2268227364Sadrian * 2269227364Sadrian * This is done to make it easy for the software scheduler to 2270227364Sadrian * find which nodes have data to send. 2271227364Sadrian * 2272227364Sadrian * The TXQ lock must be held. 2273227364Sadrian */ 2274227364Sadrianstatic void 2275227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2276227364Sadrian{ 2277227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2278227364Sadrian 2279227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2280227364Sadrian 2281227364Sadrian if (tid->paused) 2282227364Sadrian return; /* paused, can't schedule yet */ 2283227364Sadrian 2284227364Sadrian if (tid->sched) 2285227364Sadrian return; /* already scheduled */ 2286227364Sadrian 2287227364Sadrian tid->sched = 1; 2288227364Sadrian 2289227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2290227364Sadrian} 2291227364Sadrian 2292227364Sadrian/* 2293227364Sadrian * Mark the current node as no longer needing to be polled for 2294227364Sadrian * TX packets. 2295227364Sadrian * 2296227364Sadrian * The TXQ lock must be held. 2297227364Sadrian */ 2298227364Sadrianstatic void 2299227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2300227364Sadrian{ 2301227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2302227364Sadrian 2303227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2304227364Sadrian 2305227364Sadrian if (tid->sched == 0) 2306227364Sadrian return; 2307227364Sadrian 2308227364Sadrian tid->sched = 0; 2309227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2310227364Sadrian} 2311227364Sadrian 2312227364Sadrian/* 2313227364Sadrian * Assign a sequence number manually to the given frame. 2314227364Sadrian * 2315227364Sadrian * This should only be called for A-MPDU TX frames. 2316227364Sadrian */ 2317236872Sadrianstatic ieee80211_seq 2318227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2319227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2320227364Sadrian{ 2321227364Sadrian struct ieee80211_frame *wh; 2322227364Sadrian int tid, pri; 2323227364Sadrian ieee80211_seq seqno; 2324227364Sadrian uint8_t subtype; 2325227364Sadrian 2326227364Sadrian /* TID lookup */ 2327227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2328227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2329227364Sadrian tid = WME_AC_TO_TID(pri); 2330236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2331236872Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2332227364Sadrian 2333227364Sadrian /* XXX Is it a control frame? Ignore */ 2334227364Sadrian 2335227364Sadrian /* Does the packet require a sequence number? */ 2336227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2337227364Sadrian return -1; 2338227364Sadrian 2339236880Sadrian ATH_TID_LOCK_ASSERT(sc, &(ATH_NODE(ni)->an_tid[tid])); 2340236880Sadrian 2341227364Sadrian /* 2342227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2343227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2344227364Sadrian * 2345227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2346227364Sadrian * data frame sequence number in the aggregation state updates, so 2347227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2348227364Sadrian * RX side. 2349227364Sadrian */ 2350227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2351227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2352236880Sadrian /* XXX no locking for this TID? This is a bit of a problem. */ 2353227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2354227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2355227364Sadrian } else { 2356227364Sadrian /* Manually assign sequence number */ 2357227364Sadrian seqno = ni->ni_txseqs[tid]; 2358227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2359227364Sadrian } 2360227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2361227364Sadrian M_SEQNO_SET(m0, seqno); 2362227364Sadrian 2363227364Sadrian /* Return so caller can do something with it if needed */ 2364236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2365227364Sadrian return seqno; 2366227364Sadrian} 2367227364Sadrian 2368227364Sadrian/* 2369227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2370227364Sadrian * If the frame is out of BAW, queue. 2371227364Sadrian * Otherwise, schedule it as a single frame. 2372227364Sadrian */ 2373227364Sadrianstatic void 2374227364Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, struct ath_buf *bf) 2375227364Sadrian{ 2376227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2377227364Sadrian struct ath_txq *txq = bf->bf_state.bfs_txq; 2378227364Sadrian struct ieee80211_tx_ampdu *tap; 2379227364Sadrian 2380227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2381236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2382227364Sadrian 2383227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2384227364Sadrian 2385227364Sadrian /* paused? queue */ 2386227364Sadrian if (tid->paused) { 2387236876Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2388233480Sadrian /* XXX don't sched - we're paused! */ 2389227364Sadrian return; 2390227364Sadrian } 2391227364Sadrian 2392227364Sadrian /* outside baw? queue */ 2393227364Sadrian if (bf->bf_state.bfs_dobaw && 2394227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2395227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2396236878Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2397227364Sadrian ath_tx_tid_sched(sc, tid); 2398227364Sadrian return; 2399227364Sadrian } 2400227364Sadrian 2401227364Sadrian /* Direct dispatch to hardware */ 2402227364Sadrian ath_tx_do_ratelookup(sc, bf); 2403233989Sadrian ath_tx_calc_duration(sc, bf); 2404233989Sadrian ath_tx_calc_protection(sc, bf); 2405233989Sadrian ath_tx_set_rtscts(sc, bf); 2406227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2407227364Sadrian ath_tx_setds(sc, bf); 2408227364Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 2409227364Sadrian ath_tx_chaindesclist(sc, bf); 2410227364Sadrian 2411227364Sadrian /* Statistics */ 2412227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2413227364Sadrian 2414227364Sadrian /* Track per-TID hardware queue depth correctly */ 2415227364Sadrian tid->hwq_depth++; 2416227364Sadrian 2417227364Sadrian /* Add to BAW */ 2418227364Sadrian if (bf->bf_state.bfs_dobaw) { 2419227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2420227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2421227364Sadrian } 2422227364Sadrian 2423227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2424227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2425227364Sadrian 2426227364Sadrian /* Hand off to hardware */ 2427227364Sadrian ath_tx_handoff(sc, txq, bf); 2428227364Sadrian} 2429227364Sadrian 2430227364Sadrian/* 2431227364Sadrian * Attempt to send the packet. 2432227364Sadrian * If the queue isn't busy, direct-dispatch. 2433227364Sadrian * If the queue is busy enough, queue the given packet on the 2434227364Sadrian * relevant software queue. 2435227364Sadrian */ 2436227364Sadrianvoid 2437227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2438227364Sadrian struct ath_buf *bf) 2439227364Sadrian{ 2440227364Sadrian struct ath_node *an = ATH_NODE(ni); 2441227364Sadrian struct ieee80211_frame *wh; 2442227364Sadrian struct ath_tid *atid; 2443227364Sadrian int pri, tid; 2444227364Sadrian struct mbuf *m0 = bf->bf_m; 2445227364Sadrian 2446236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2447236880Sadrian 2448227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2449227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2450227364Sadrian pri = ath_tx_getac(sc, m0); 2451227364Sadrian tid = ath_tx_gettid(sc, m0); 2452227364Sadrian atid = &an->an_tid[tid]; 2453227364Sadrian 2454236873Sadrian ATH_TID_LOCK_ASSERT(sc, atid); 2455236873Sadrian 2456236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2457236872Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2458227364Sadrian 2459227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2460227364Sadrian bf->bf_state.bfs_tid = tid; 2461227364Sadrian bf->bf_state.bfs_txq = txq; 2462227364Sadrian bf->bf_state.bfs_pri = pri; 2463227364Sadrian 2464227364Sadrian /* 2465227364Sadrian * If the hardware queue isn't busy, queue it directly. 2466227364Sadrian * If the hardware queue is busy, queue it. 2467227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2468227364Sadrian * queue it. 2469227364Sadrian */ 2470227364Sadrian if (atid->paused) { 2471227364Sadrian /* TID is paused, queue */ 2472236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2473227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2474227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2475227364Sadrian /* AMPDU pending; queue */ 2476236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2477227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2478227364Sadrian /* XXX sched? */ 2479227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2480227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2481236877Sadrian 2482236877Sadrian /* 2483236877Sadrian * Always queue the frame to the tail of the list. 2484236877Sadrian */ 2485236877Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2486236877Sadrian 2487236877Sadrian /* 2488236877Sadrian * If the hardware queue isn't busy, direct dispatch 2489236877Sadrian * the head frame in the list. Don't schedule the 2490236877Sadrian * TID - let it build some more frames first? 2491236877Sadrian * 2492236877Sadrian * Otherwise, schedule the TID. 2493236877Sadrian */ 2494229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2495236877Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2496236877Sadrian ATH_TXQ_REMOVE(atid, bf, bf_list); 2497236872Sadrian ath_tx_xmit_aggr(sc, an, bf); 2498233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2499236872Sadrian "%s: xmit_aggr\n", 2500236872Sadrian __func__); 2501229949Sadrian } else { 2502229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2503236872Sadrian "%s: ampdu; swq'ing\n", 2504236872Sadrian __func__); 2505227364Sadrian ath_tx_tid_sched(sc, atid); 2506227364Sadrian } 2507227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2508227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2509236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2510227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2511227364Sadrian } else { 2512227364Sadrian /* Busy; queue */ 2513236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2514227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2515227364Sadrian ath_tx_tid_sched(sc, atid); 2516227364Sadrian } 2517227364Sadrian} 2518227364Sadrian 2519227364Sadrian/* 2520227364Sadrian * Do the basic frame setup stuff that's required before the frame 2521227364Sadrian * is added to a software queue. 2522227364Sadrian * 2523227364Sadrian * All frames get mostly the same treatment and it's done once. 2524227364Sadrian * Retransmits fiddle with things like the rate control setup, 2525227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2526227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2527227364Sadrian * 2528227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2529227364Sadrian * m0 may not be valid. 2530227364Sadrian */ 2531227364Sadrian 2532227364Sadrian 2533227364Sadrian/* 2534227364Sadrian * Configure the per-TID node state. 2535227364Sadrian * 2536227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2537227364Sadrian * else to put it just yet. 2538227364Sadrian * 2539227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2540227364Sadrian */ 2541227364Sadrianvoid 2542227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2543227364Sadrian{ 2544227364Sadrian int i, j; 2545227364Sadrian struct ath_tid *atid; 2546227364Sadrian 2547227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2548227364Sadrian atid = &an->an_tid[i]; 2549227364Sadrian TAILQ_INIT(&atid->axq_q); 2550227364Sadrian atid->tid = i; 2551227364Sadrian atid->an = an; 2552227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2553227364Sadrian atid->tx_buf[j] = NULL; 2554227364Sadrian atid->baw_head = atid->baw_tail = 0; 2555227364Sadrian atid->paused = 0; 2556227364Sadrian atid->sched = 0; 2557227364Sadrian atid->hwq_depth = 0; 2558227364Sadrian atid->cleanup_inprogress = 0; 2559227364Sadrian if (i == IEEE80211_NONQOS_TID) 2560227364Sadrian atid->ac = WME_AC_BE; 2561227364Sadrian else 2562227364Sadrian atid->ac = TID_TO_WME_AC(i); 2563227364Sadrian } 2564227364Sadrian} 2565227364Sadrian 2566227364Sadrian/* 2567227364Sadrian * Pause the current TID. This stops packets from being transmitted 2568227364Sadrian * on it. 2569227364Sadrian * 2570227364Sadrian * Since this is also called from upper layers as well as the driver, 2571227364Sadrian * it will get the TID lock. 2572227364Sadrian */ 2573227364Sadrianstatic void 2574227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2575227364Sadrian{ 2576233908Sadrian 2577233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2578227364Sadrian tid->paused++; 2579227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2580227364Sadrian __func__, tid->paused); 2581227364Sadrian} 2582227364Sadrian 2583227364Sadrian/* 2584227364Sadrian * Unpause the current TID, and schedule it if needed. 2585227364Sadrian */ 2586227364Sadrianstatic void 2587227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2588227364Sadrian{ 2589227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2590227364Sadrian 2591227364Sadrian tid->paused--; 2592227364Sadrian 2593227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2594227364Sadrian __func__, tid->paused); 2595227364Sadrian 2596227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2597227364Sadrian return; 2598227364Sadrian } 2599227364Sadrian 2600227364Sadrian ath_tx_tid_sched(sc, tid); 2601227364Sadrian /* Punt some frames to the hardware if needed */ 2602233673Sadrian //ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2603233673Sadrian taskqueue_enqueue(sc->sc_tq, &sc->sc_txqtask); 2604227364Sadrian} 2605227364Sadrian 2606227364Sadrian/* 2607233908Sadrian * Suspend the queue because we need to TX a BAR. 2608233908Sadrian */ 2609233908Sadrianstatic void 2610233908Sadrianath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid) 2611233908Sadrian{ 2612233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2613233908Sadrian 2614235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2615235676Sadrian "%s: tid=%p, bar_wait=%d, bar_tx=%d, called\n", 2616233908Sadrian __func__, 2617235676Sadrian tid, 2618235676Sadrian tid->bar_wait, 2619235676Sadrian tid->bar_tx); 2620233908Sadrian 2621233908Sadrian /* We shouldn't be called when bar_tx is 1 */ 2622233908Sadrian if (tid->bar_tx) { 2623233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx is 1?!\n", 2624233908Sadrian __func__); 2625233908Sadrian } 2626233908Sadrian 2627233908Sadrian /* If we've already been called, just be patient. */ 2628233908Sadrian if (tid->bar_wait) 2629233908Sadrian return; 2630233908Sadrian 2631233908Sadrian /* Wait! */ 2632233908Sadrian tid->bar_wait = 1; 2633233908Sadrian 2634233908Sadrian /* Only one pause, no matter how many frames fail */ 2635233908Sadrian ath_tx_tid_pause(sc, tid); 2636233908Sadrian} 2637233908Sadrian 2638233908Sadrian/* 2639233908Sadrian * We've finished with BAR handling - either we succeeded or 2640233908Sadrian * failed. Either way, unsuspend TX. 2641233908Sadrian */ 2642233908Sadrianstatic void 2643233908Sadrianath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid) 2644233908Sadrian{ 2645233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2646233908Sadrian 2647235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2648233908Sadrian "%s: tid=%p, called\n", 2649233908Sadrian __func__, 2650233908Sadrian tid); 2651233908Sadrian 2652233908Sadrian if (tid->bar_tx == 0 || tid->bar_wait == 0) { 2653233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx=%d, bar_wait=%d: ?\n", 2654233908Sadrian __func__, tid->bar_tx, tid->bar_wait); 2655233908Sadrian } 2656233908Sadrian 2657233908Sadrian tid->bar_tx = tid->bar_wait = 0; 2658233908Sadrian ath_tx_tid_resume(sc, tid); 2659233908Sadrian} 2660233908Sadrian 2661233908Sadrian/* 2662233908Sadrian * Return whether we're ready to TX a BAR frame. 2663233908Sadrian * 2664233908Sadrian * Requires the TID lock be held. 2665233908Sadrian */ 2666233908Sadrianstatic int 2667233908Sadrianath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid) 2668233908Sadrian{ 2669233908Sadrian 2670233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2671233908Sadrian 2672233908Sadrian if (tid->bar_wait == 0 || tid->hwq_depth > 0) 2673233908Sadrian return (0); 2674233908Sadrian 2675235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, "%s: tid=%p (%d), bar ready\n", 2676235491Sadrian __func__, tid, tid->tid); 2677235491Sadrian 2678233908Sadrian return (1); 2679233908Sadrian} 2680233908Sadrian 2681233908Sadrian/* 2682233908Sadrian * Check whether the current TID is ready to have a BAR 2683233908Sadrian * TXed and if so, do the TX. 2684233908Sadrian * 2685233908Sadrian * Since the TID/TXQ lock can't be held during a call to 2686233908Sadrian * ieee80211_send_bar(), we have to do the dirty thing of unlocking it, 2687233908Sadrian * sending the BAR and locking it again. 2688233908Sadrian * 2689233908Sadrian * Eventually, the code to send the BAR should be broken out 2690233908Sadrian * from this routine so the lock doesn't have to be reacquired 2691233908Sadrian * just to be immediately dropped by the caller. 2692233908Sadrian */ 2693233908Sadrianstatic void 2694233908Sadrianath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid) 2695233908Sadrian{ 2696233908Sadrian struct ieee80211_tx_ampdu *tap; 2697233908Sadrian 2698233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2699233908Sadrian 2700235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2701233908Sadrian "%s: tid=%p, called\n", 2702233908Sadrian __func__, 2703233908Sadrian tid); 2704233908Sadrian 2705233908Sadrian tap = ath_tx_get_tx_tid(tid->an, tid->tid); 2706233908Sadrian 2707233908Sadrian /* 2708233908Sadrian * This is an error condition! 2709233908Sadrian */ 2710233908Sadrian if (tid->bar_wait == 0 || tid->bar_tx == 1) { 2711233908Sadrian device_printf(sc->sc_dev, 2712233908Sadrian "%s: tid=%p, bar_tx=%d, bar_wait=%d: ?\n", 2713233908Sadrian __func__, 2714233908Sadrian tid, 2715233908Sadrian tid->bar_tx, 2716233908Sadrian tid->bar_wait); 2717233908Sadrian return; 2718233908Sadrian } 2719233908Sadrian 2720233908Sadrian /* Don't do anything if we still have pending frames */ 2721233908Sadrian if (tid->hwq_depth > 0) { 2722235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2723233908Sadrian "%s: tid=%p, hwq_depth=%d, waiting\n", 2724233908Sadrian __func__, 2725233908Sadrian tid, 2726233908Sadrian tid->hwq_depth); 2727233908Sadrian return; 2728233908Sadrian } 2729233908Sadrian 2730233908Sadrian /* We're now about to TX */ 2731233908Sadrian tid->bar_tx = 1; 2732233908Sadrian 2733233908Sadrian /* 2734233908Sadrian * Calculate new BAW left edge, now that all frames have either 2735233908Sadrian * succeeded or failed. 2736233908Sadrian * 2737233908Sadrian * XXX verify this is _actually_ the valid value to begin at! 2738233908Sadrian */ 2739235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2740233908Sadrian "%s: tid=%p, new BAW left edge=%d\n", 2741233908Sadrian __func__, 2742233908Sadrian tid, 2743233908Sadrian tap->txa_start); 2744233908Sadrian 2745233908Sadrian /* Try sending the BAR frame */ 2746233908Sadrian /* We can't hold the lock here! */ 2747233908Sadrian 2748233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2749233908Sadrian if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) { 2750233908Sadrian /* Success? Now we wait for notification that it's done */ 2751233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2752233908Sadrian return; 2753233908Sadrian } 2754233908Sadrian 2755233908Sadrian /* Failure? For now, warn loudly and continue */ 2756233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2757233908Sadrian device_printf(sc->sc_dev, "%s: tid=%p, failed to TX BAR, continue!\n", 2758233908Sadrian __func__, tid); 2759233908Sadrian ath_tx_tid_bar_unsuspend(sc, tid); 2760233908Sadrian} 2761233908Sadrian 2762233908Sadrian 2763233908Sadrian/* 2764227364Sadrian * Free any packets currently pending in the software TX queue. 2765227364Sadrian * 2766227364Sadrian * This will be called when a node is being deleted. 2767227364Sadrian * 2768227364Sadrian * It can also be called on an active node during an interface 2769227364Sadrian * reset or state transition. 2770227364Sadrian * 2771227364Sadrian * (From Linux/reference): 2772227364Sadrian * 2773227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2774227364Sadrian * sequence number(s) without setting the retry bit. The 2775227364Sadrian * alternative is to give up on these and BAR the receiver's window 2776227364Sadrian * forward. 2777227364Sadrian */ 2778227364Sadrianstatic void 2779229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 2780229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 2781227364Sadrian{ 2782227364Sadrian struct ath_buf *bf; 2783227364Sadrian struct ieee80211_tx_ampdu *tap; 2784227364Sadrian struct ieee80211_node *ni = &an->an_node; 2785227364Sadrian int t = 0; 2786227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2787227364Sadrian 2788227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2789227364Sadrian 2790227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2791227364Sadrian 2792227364Sadrian /* Walk the queue, free frames */ 2793227364Sadrian for (;;) { 2794227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2795227364Sadrian if (bf == NULL) { 2796227364Sadrian break; 2797227364Sadrian } 2798227364Sadrian 2799227364Sadrian if (t == 0) { 2800227364Sadrian device_printf(sc->sc_dev, 2801233330Sadrian "%s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 2802236872Sadrian "seqno=%d, retry=%d\n", 2803233330Sadrian __func__, ni, bf, 2804233330Sadrian bf->bf_state.bfs_addedbaw, 2805233330Sadrian bf->bf_state.bfs_dobaw, 2806233480Sadrian SEQNO(bf->bf_state.bfs_seqno), 2807233480Sadrian bf->bf_state.bfs_retries); 2808233330Sadrian device_printf(sc->sc_dev, 2809235491Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d\n", 2810233480Sadrian __func__, ni, bf, 2811233480Sadrian tid->axq_depth, 2812235491Sadrian tid->hwq_depth, 2813235491Sadrian tid->bar_wait); 2814233480Sadrian device_printf(sc->sc_dev, 2815236872Sadrian "%s: node %p: tid %d: txq_depth=%d, " 2816227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2817229949Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, " 2818229949Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 2819236872Sadrian __func__, ni, tid->tid, txq->axq_depth, 2820227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2821227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2822227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2823227364Sadrian ni->ni_txseqs[tid->tid]); 2824229165Sadrian 2825229165Sadrian /* XXX Dump the frame, see what it is? */ 2826229165Sadrian ieee80211_dump_pkt(ni->ni_ic, 2827229165Sadrian mtod(bf->bf_m, const uint8_t *), 2828229165Sadrian bf->bf_m->m_len, 0, -1); 2829229165Sadrian 2830233897Sadrian t = 1; 2831227364Sadrian } 2832227364Sadrian 2833227364Sadrian 2834227364Sadrian /* 2835227364Sadrian * If the current TID is running AMPDU, update 2836227364Sadrian * the BAW. 2837227364Sadrian */ 2838227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 2839227364Sadrian bf->bf_state.bfs_dobaw) { 2840227364Sadrian /* 2841227364Sadrian * Only remove the frame from the BAW if it's 2842227364Sadrian * been transmitted at least once; this means 2843227364Sadrian * the frame was in the BAW to begin with. 2844227364Sadrian */ 2845227364Sadrian if (bf->bf_state.bfs_retries > 0) { 2846227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 2847227364Sadrian bf->bf_state.bfs_dobaw = 0; 2848227364Sadrian } 2849227364Sadrian /* 2850227364Sadrian * This has become a non-fatal error now 2851227364Sadrian */ 2852227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2853227364Sadrian device_printf(sc->sc_dev, 2854227364Sadrian "%s: wasn't added: seqno %d\n", 2855227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2856227364Sadrian } 2857227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 2858227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 2859227364Sadrian } 2860227364Sadrian 2861227364Sadrian /* 2862227364Sadrian * Now that it's completed, grab the TID lock and update 2863227364Sadrian * the sequence number and BAW window. 2864227364Sadrian * Because sequence numbers have been assigned to frames 2865227364Sadrian * that haven't been sent yet, it's entirely possible 2866227364Sadrian * we'll be called with some pending frames that have not 2867227364Sadrian * been transmitted. 2868227364Sadrian * 2869227364Sadrian * The cleaner solution is to do the sequence number allocation 2870227364Sadrian * when the packet is first transmitted - and thus the "retries" 2871227364Sadrian * check above would be enough to update the BAW/seqno. 2872227364Sadrian */ 2873227364Sadrian 2874227364Sadrian /* But don't do it for non-QoS TIDs */ 2875227364Sadrian if (tap) { 2876227364Sadrian#if 0 2877227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2878227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 2879227364Sadrian __func__, an, tid->tid, tap->txa_start); 2880227364Sadrian#endif 2881227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 2882227364Sadrian tid->baw_tail = tid->baw_head; 2883227364Sadrian } 2884227364Sadrian} 2885227364Sadrian 2886227364Sadrian/* 2887227364Sadrian * Flush all software queued packets for the given node. 2888227364Sadrian * 2889227364Sadrian * This occurs when a completion handler frees the last buffer 2890227364Sadrian * for a node, and the node is thus freed. This causes the node 2891227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 2892227364Sadrian */ 2893227364Sadrianvoid 2894227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 2895227364Sadrian{ 2896227364Sadrian int tid; 2897227364Sadrian ath_bufhead bf_cq; 2898227364Sadrian struct ath_buf *bf; 2899227364Sadrian 2900227364Sadrian TAILQ_INIT(&bf_cq); 2901227364Sadrian 2902227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 2903227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2904227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 2905227364Sadrian 2906227364Sadrian /* Remove this tid from the list of active tids */ 2907227364Sadrian ATH_TXQ_LOCK(txq); 2908227364Sadrian ath_tx_tid_unsched(sc, atid); 2909227364Sadrian 2910227364Sadrian /* Free packets */ 2911227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 2912227364Sadrian ATH_TXQ_UNLOCK(txq); 2913227364Sadrian } 2914227364Sadrian 2915227364Sadrian /* Handle completed frames */ 2916227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2917227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2918227364Sadrian ath_tx_default_comp(sc, bf, 0); 2919227364Sadrian } 2920227364Sadrian} 2921227364Sadrian 2922227364Sadrian/* 2923227364Sadrian * Drain all the software TXQs currently with traffic queued. 2924227364Sadrian */ 2925227364Sadrianvoid 2926227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 2927227364Sadrian{ 2928227364Sadrian struct ath_tid *tid; 2929227364Sadrian ath_bufhead bf_cq; 2930227364Sadrian struct ath_buf *bf; 2931227364Sadrian 2932227364Sadrian TAILQ_INIT(&bf_cq); 2933227364Sadrian ATH_TXQ_LOCK(txq); 2934227364Sadrian 2935227364Sadrian /* 2936227364Sadrian * Iterate over all active tids for the given txq, 2937227364Sadrian * flushing and unsched'ing them 2938227364Sadrian */ 2939227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 2940227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 2941227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 2942227364Sadrian ath_tx_tid_unsched(sc, tid); 2943227364Sadrian } 2944227364Sadrian 2945227364Sadrian ATH_TXQ_UNLOCK(txq); 2946227364Sadrian 2947227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 2948227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 2949227364Sadrian ath_tx_default_comp(sc, bf, 0); 2950227364Sadrian } 2951227364Sadrian} 2952227364Sadrian 2953227364Sadrian/* 2954227364Sadrian * Handle completion of non-aggregate session frames. 2955227364Sadrian */ 2956227364Sadrianvoid 2957227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 2958227364Sadrian{ 2959227364Sadrian struct ieee80211_node *ni = bf->bf_node; 2960227364Sadrian struct ath_node *an = ATH_NODE(ni); 2961227364Sadrian int tid = bf->bf_state.bfs_tid; 2962227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2963227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 2964227364Sadrian 2965227364Sadrian /* The TID state is protected behind the TXQ lock */ 2966227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 2967227364Sadrian 2968227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 2969227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 2970227364Sadrian 2971227364Sadrian atid->hwq_depth--; 2972227364Sadrian if (atid->hwq_depth < 0) 2973227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 2974227364Sadrian __func__, atid->hwq_depth); 2975227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 2976227364Sadrian 2977227364Sadrian /* 2978227364Sadrian * punt to rate control if we're not being cleaned up 2979227364Sadrian * during a hw queue drain and the frame wanted an ACK. 2980227364Sadrian */ 2981233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 2982227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 2983227364Sadrian ts, bf->bf_state.bfs_pktlen, 2984227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 2985227364Sadrian 2986227364Sadrian ath_tx_default_comp(sc, bf, fail); 2987227364Sadrian} 2988227364Sadrian 2989227364Sadrian/* 2990227364Sadrian * Handle cleanup of aggregate session packets that aren't 2991227364Sadrian * an A-MPDU. 2992227364Sadrian * 2993227364Sadrian * There's no need to update the BAW here - the session is being 2994227364Sadrian * torn down. 2995227364Sadrian */ 2996227364Sadrianstatic void 2997227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 2998227364Sadrian{ 2999227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3000227364Sadrian struct ath_node *an = ATH_NODE(ni); 3001227364Sadrian int tid = bf->bf_state.bfs_tid; 3002227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3003227364Sadrian 3004227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 3005227364Sadrian __func__, tid, atid->incomp); 3006227364Sadrian 3007227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3008227364Sadrian atid->incomp--; 3009227364Sadrian if (atid->incomp == 0) { 3010227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3011227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3012227364Sadrian __func__, tid); 3013227364Sadrian atid->cleanup_inprogress = 0; 3014227364Sadrian ath_tx_tid_resume(sc, atid); 3015227364Sadrian } 3016227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3017227364Sadrian 3018227364Sadrian ath_tx_default_comp(sc, bf, 0); 3019227364Sadrian} 3020227364Sadrian 3021227364Sadrian/* 3022227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 3023227364Sadrian * unaggregated. 3024227364Sadrian * 3025227364Sadrian * - Discard all retry frames from the s/w queue. 3026227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 3027227364Sadrian * - Count the number of unacked frames, and let transmit completion 3028227364Sadrian * handle it later. 3029227364Sadrian * 3030227364Sadrian * The caller is responsible for pausing the TID. 3031227364Sadrian */ 3032227364Sadrianstatic void 3033235749Sadrianath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 3034227364Sadrian{ 3035227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3036227364Sadrian struct ieee80211_tx_ampdu *tap; 3037227364Sadrian struct ath_buf *bf, *bf_next; 3038227364Sadrian ath_bufhead bf_cq; 3039227364Sadrian 3040235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 3041227364Sadrian "%s: TID %d: called\n", __func__, tid); 3042227364Sadrian 3043227364Sadrian TAILQ_INIT(&bf_cq); 3044227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3045227364Sadrian 3046227364Sadrian /* 3047227364Sadrian * Update the frames in the software TX queue: 3048227364Sadrian * 3049227364Sadrian * + Discard retry frames in the queue 3050227364Sadrian * + Fix the completion function to be non-aggregate 3051227364Sadrian */ 3052227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 3053227364Sadrian while (bf) { 3054227364Sadrian if (bf->bf_state.bfs_isretried) { 3055227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 3056227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 3057227364Sadrian atid->axq_depth--; 3058227364Sadrian if (bf->bf_state.bfs_dobaw) { 3059227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3060227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3061227364Sadrian device_printf(sc->sc_dev, 3062227364Sadrian "%s: wasn't added: seqno %d\n", 3063229949Sadrian __func__, 3064229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3065227364Sadrian } 3066227364Sadrian bf->bf_state.bfs_dobaw = 0; 3067227364Sadrian /* 3068227364Sadrian * Call the default completion handler with "fail" just 3069227364Sadrian * so upper levels are suitably notified about this. 3070227364Sadrian */ 3071227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3072227364Sadrian bf = bf_next; 3073227364Sadrian continue; 3074227364Sadrian } 3075227364Sadrian /* Give these the default completion handler */ 3076227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3077227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 3078227364Sadrian } 3079227364Sadrian 3080227364Sadrian /* The caller is required to pause the TID */ 3081227364Sadrian#if 0 3082227364Sadrian /* Pause the TID */ 3083227364Sadrian ath_tx_tid_pause(sc, atid); 3084227364Sadrian#endif 3085227364Sadrian 3086227364Sadrian /* 3087227364Sadrian * Calculate what hardware-queued frames exist based 3088227364Sadrian * on the current BAW size. Ie, what frames have been 3089227364Sadrian * added to the TX hardware queue for this TID but 3090227364Sadrian * not yet ACKed. 3091227364Sadrian */ 3092227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3093227364Sadrian /* Need the lock - fiddling with BAW */ 3094227364Sadrian while (atid->baw_head != atid->baw_tail) { 3095227364Sadrian if (atid->tx_buf[atid->baw_head]) { 3096227364Sadrian atid->incomp++; 3097227364Sadrian atid->cleanup_inprogress = 1; 3098227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 3099227364Sadrian } 3100227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 3101227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 3102227364Sadrian } 3103227364Sadrian 3104227364Sadrian /* 3105227364Sadrian * If cleanup is required, defer TID scheduling 3106227364Sadrian * until all the HW queued packets have been 3107227364Sadrian * sent. 3108227364Sadrian */ 3109227364Sadrian if (! atid->cleanup_inprogress) 3110227364Sadrian ath_tx_tid_resume(sc, atid); 3111227364Sadrian 3112227364Sadrian if (atid->cleanup_inprogress) 3113227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3114227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 3115227364Sadrian __func__, tid, atid->incomp); 3116227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3117227364Sadrian 3118227364Sadrian /* Handle completing frames and fail them */ 3119227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3120227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3121227364Sadrian ath_tx_default_comp(sc, bf, 1); 3122227364Sadrian } 3123227364Sadrian} 3124227364Sadrian 3125227364Sadrianstatic void 3126227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 3127227364Sadrian{ 3128227364Sadrian struct ieee80211_frame *wh; 3129227364Sadrian 3130227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 3131227364Sadrian /* Only update/resync if needed */ 3132227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 3133227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 3134227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3135227364Sadrian BUS_DMASYNC_PREWRITE); 3136227364Sadrian } 3137227364Sadrian sc->sc_stats.ast_tx_swretries++; 3138227364Sadrian bf->bf_state.bfs_isretried = 1; 3139227364Sadrian bf->bf_state.bfs_retries ++; 3140227364Sadrian} 3141227364Sadrian 3142227364Sadrianstatic struct ath_buf * 3143227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3144227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3145227364Sadrian{ 3146227364Sadrian struct ath_buf *nbf; 3147227364Sadrian int error; 3148227364Sadrian 3149227364Sadrian nbf = ath_buf_clone(sc, bf); 3150227364Sadrian 3151227364Sadrian#if 0 3152227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3153227364Sadrian __func__); 3154227364Sadrian#endif 3155227364Sadrian 3156227364Sadrian if (nbf == NULL) { 3157227364Sadrian /* Failed to clone */ 3158227364Sadrian device_printf(sc->sc_dev, 3159227364Sadrian "%s: failed to clone a busy buffer\n", 3160227364Sadrian __func__); 3161227364Sadrian return NULL; 3162227364Sadrian } 3163227364Sadrian 3164227364Sadrian /* Setup the dma for the new buffer */ 3165227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3166227364Sadrian if (error != 0) { 3167227364Sadrian device_printf(sc->sc_dev, 3168227364Sadrian "%s: failed to setup dma for clone\n", 3169227364Sadrian __func__); 3170227364Sadrian /* 3171227364Sadrian * Put this at the head of the list, not tail; 3172227364Sadrian * that way it doesn't interfere with the 3173227364Sadrian * busy buffer logic (which uses the tail of 3174227364Sadrian * the list.) 3175227364Sadrian */ 3176227364Sadrian ATH_TXBUF_LOCK(sc); 3177236994Sadrian ath_returnbuf_head(sc, nbf); 3178227364Sadrian ATH_TXBUF_UNLOCK(sc); 3179227364Sadrian return NULL; 3180227364Sadrian } 3181227364Sadrian 3182227398Sadrian /* Update BAW if required, before we free the original buf */ 3183227398Sadrian if (bf->bf_state.bfs_dobaw) 3184227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3185227398Sadrian 3186227364Sadrian /* Free current buffer; return the older buffer */ 3187227364Sadrian bf->bf_m = NULL; 3188227364Sadrian bf->bf_node = NULL; 3189227364Sadrian ath_freebuf(sc, bf); 3190227364Sadrian return nbf; 3191227364Sadrian} 3192227364Sadrian 3193227364Sadrian/* 3194227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3195227364Sadrian * session. 3196227364Sadrian * 3197227364Sadrian * If too many retries occur, pause the TID, wait for 3198227364Sadrian * any further retransmits (as there's no reason why 3199227364Sadrian * non-aggregate frames in an aggregate session are 3200227364Sadrian * transmitted in-order; they just have to be in-BAW) 3201227364Sadrian * and then queue a BAR. 3202227364Sadrian */ 3203227364Sadrianstatic void 3204227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3205227364Sadrian{ 3206227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3207227364Sadrian struct ath_node *an = ATH_NODE(ni); 3208227364Sadrian int tid = bf->bf_state.bfs_tid; 3209227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3210227364Sadrian struct ieee80211_tx_ampdu *tap; 3211227364Sadrian 3212227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3213227364Sadrian 3214227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3215227364Sadrian 3216227364Sadrian /* 3217227364Sadrian * If the buffer is marked as busy, we can't directly 3218227364Sadrian * reuse it. Instead, try to clone the buffer. 3219227364Sadrian * If the clone is successful, recycle the old buffer. 3220227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3221227364Sadrian * to force the next bit of code to free the buffer 3222227364Sadrian * for us. 3223227364Sadrian */ 3224227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3225227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3226227364Sadrian struct ath_buf *nbf; 3227227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3228227364Sadrian if (nbf) 3229227364Sadrian /* bf has been freed at this point */ 3230227364Sadrian bf = nbf; 3231227364Sadrian else 3232227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3233227364Sadrian } 3234227364Sadrian 3235227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3236227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3237227364Sadrian "%s: exceeded retries; seqno %d\n", 3238227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3239227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3240227364Sadrian 3241227364Sadrian /* Update BAW anyway */ 3242227364Sadrian if (bf->bf_state.bfs_dobaw) { 3243227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3244227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3245227364Sadrian device_printf(sc->sc_dev, 3246227364Sadrian "%s: wasn't added: seqno %d\n", 3247227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3248227364Sadrian } 3249227364Sadrian bf->bf_state.bfs_dobaw = 0; 3250227364Sadrian 3251233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3252233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3253227364Sadrian 3254233908Sadrian /* Send the BAR if there are no other frames waiting */ 3255233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3256233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3257227364Sadrian 3258233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3259227364Sadrian 3260227364Sadrian /* Free buffer, bf is free after this call */ 3261227364Sadrian ath_tx_default_comp(sc, bf, 0); 3262227364Sadrian return; 3263227364Sadrian } 3264227364Sadrian 3265227364Sadrian /* 3266227364Sadrian * This increments the retry counter as well as 3267227364Sadrian * sets the retry flag in the ath_buf and packet 3268227364Sadrian * body. 3269227364Sadrian */ 3270227364Sadrian ath_tx_set_retry(sc, bf); 3271227364Sadrian 3272227364Sadrian /* 3273227364Sadrian * Insert this at the head of the queue, so it's 3274227364Sadrian * retried before any current/subsequent frames. 3275227364Sadrian */ 3276227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3277227364Sadrian ath_tx_tid_sched(sc, atid); 3278233908Sadrian /* Send the BAR if there are no other frames waiting */ 3279233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3280233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3281227364Sadrian 3282227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3283227364Sadrian} 3284227364Sadrian 3285227364Sadrian/* 3286227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3287227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3288227364Sadrian * buffers. 3289227364Sadrian * 3290227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3291227364Sadrian */ 3292227364Sadrianstatic int 3293227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3294227364Sadrian ath_bufhead *bf_q) 3295227364Sadrian{ 3296227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3297227364Sadrian struct ath_node *an = ATH_NODE(ni); 3298227364Sadrian int tid = bf->bf_state.bfs_tid; 3299227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3300227364Sadrian 3301227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 3302227364Sadrian 3303227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3304227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 3305227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 3306227364Sadrian 3307227364Sadrian /* 3308227364Sadrian * If the buffer is marked as busy, we can't directly 3309227364Sadrian * reuse it. Instead, try to clone the buffer. 3310227364Sadrian * If the clone is successful, recycle the old buffer. 3311227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3312227364Sadrian * to force the next bit of code to free the buffer 3313227364Sadrian * for us. 3314227364Sadrian */ 3315227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3316227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3317227364Sadrian struct ath_buf *nbf; 3318227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3319227364Sadrian if (nbf) 3320227364Sadrian /* bf has been freed at this point */ 3321227364Sadrian bf = nbf; 3322227364Sadrian else 3323227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3324227364Sadrian } 3325227364Sadrian 3326227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3327227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3328227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3329227364Sadrian "%s: max retries: seqno %d\n", 3330227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3331227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3332227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3333227364Sadrian device_printf(sc->sc_dev, 3334227364Sadrian "%s: wasn't added: seqno %d\n", 3335227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3336227364Sadrian bf->bf_state.bfs_dobaw = 0; 3337227364Sadrian return 1; 3338227364Sadrian } 3339227364Sadrian 3340227364Sadrian ath_tx_set_retry(sc, bf); 3341227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 3342227364Sadrian 3343227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3344227364Sadrian return 0; 3345227364Sadrian} 3346227364Sadrian 3347227364Sadrian/* 3348227364Sadrian * error pkt completion for an aggregate destination 3349227364Sadrian */ 3350227364Sadrianstatic void 3351227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 3352227364Sadrian struct ath_tid *tid) 3353227364Sadrian{ 3354227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3355227364Sadrian struct ath_node *an = ATH_NODE(ni); 3356227364Sadrian struct ath_buf *bf_next, *bf; 3357227364Sadrian ath_bufhead bf_q; 3358227364Sadrian int drops = 0; 3359227364Sadrian struct ieee80211_tx_ampdu *tap; 3360227364Sadrian ath_bufhead bf_cq; 3361227364Sadrian 3362227364Sadrian TAILQ_INIT(&bf_q); 3363227364Sadrian TAILQ_INIT(&bf_cq); 3364227364Sadrian 3365227364Sadrian /* 3366227364Sadrian * Update rate control - all frames have failed. 3367227364Sadrian * 3368227364Sadrian * XXX use the length in the first frame in the series; 3369227364Sadrian * XXX just so things are consistent for now. 3370227364Sadrian */ 3371227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 3372227364Sadrian &bf_first->bf_status.ds_txstat, 3373227364Sadrian bf_first->bf_state.bfs_pktlen, 3374227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 3375227364Sadrian 3376227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3377227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3378227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 3379227364Sadrian 3380227364Sadrian /* Retry all subframes */ 3381227364Sadrian bf = bf_first; 3382227364Sadrian while (bf) { 3383227364Sadrian bf_next = bf->bf_next; 3384227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3385227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3386227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3387227364Sadrian drops++; 3388227364Sadrian bf->bf_next = NULL; 3389227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3390227364Sadrian } 3391227364Sadrian bf = bf_next; 3392227364Sadrian } 3393227364Sadrian 3394227364Sadrian /* Prepend all frames to the beginning of the queue */ 3395227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3396227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3397227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 3398227364Sadrian } 3399227364Sadrian 3400234725Sadrian /* 3401234725Sadrian * Schedule the TID to be re-tried. 3402234725Sadrian */ 3403227364Sadrian ath_tx_tid_sched(sc, tid); 3404227364Sadrian 3405227364Sadrian /* 3406227364Sadrian * send bar if we dropped any frames 3407227364Sadrian * 3408227364Sadrian * Keep the txq lock held for now, as we need to ensure 3409227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 3410227364Sadrian * in the ifnet TX context or raw TX context.) 3411227364Sadrian */ 3412227364Sadrian if (drops) { 3413233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3414233908Sadrian ath_tx_tid_bar_suspend(sc, tid); 3415227364Sadrian } 3416227364Sadrian 3417233908Sadrian /* 3418233908Sadrian * Send BAR if required 3419233908Sadrian */ 3420233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, tid)) 3421233908Sadrian ath_tx_tid_bar_tx(sc, tid); 3422233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3423233908Sadrian 3424227364Sadrian /* Complete frames which errored out */ 3425227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3426227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3427227364Sadrian ath_tx_default_comp(sc, bf, 0); 3428227364Sadrian } 3429227364Sadrian} 3430227364Sadrian 3431227364Sadrian/* 3432227364Sadrian * Handle clean-up of packets from an aggregate list. 3433227364Sadrian * 3434227364Sadrian * There's no need to update the BAW here - the session is being 3435227364Sadrian * torn down. 3436227364Sadrian */ 3437227364Sadrianstatic void 3438227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3439227364Sadrian{ 3440227364Sadrian struct ath_buf *bf, *bf_next; 3441227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3442227364Sadrian struct ath_node *an = ATH_NODE(ni); 3443227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3444227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3445227364Sadrian 3446227364Sadrian bf = bf_first; 3447227364Sadrian 3448227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3449227364Sadrian 3450227364Sadrian /* update incomp */ 3451227364Sadrian while (bf) { 3452227364Sadrian atid->incomp--; 3453227364Sadrian bf = bf->bf_next; 3454227364Sadrian } 3455227364Sadrian 3456227364Sadrian if (atid->incomp == 0) { 3457227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3458227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3459227364Sadrian __func__, tid); 3460227364Sadrian atid->cleanup_inprogress = 0; 3461227364Sadrian ath_tx_tid_resume(sc, atid); 3462227364Sadrian } 3463233908Sadrian 3464233908Sadrian /* Send BAR if required */ 3465233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3466233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3467227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3468227364Sadrian 3469227364Sadrian /* Handle frame completion */ 3470227364Sadrian while (bf) { 3471227364Sadrian bf_next = bf->bf_next; 3472227364Sadrian ath_tx_default_comp(sc, bf, 1); 3473227364Sadrian bf = bf_next; 3474227364Sadrian } 3475227364Sadrian} 3476227364Sadrian 3477227364Sadrian/* 3478227364Sadrian * Handle completion of an set of aggregate frames. 3479227364Sadrian * 3480227364Sadrian * XXX for now, simply complete each sub-frame. 3481227364Sadrian * 3482227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3483227364Sadrian * not the last descriptor in the first frame. 3484227364Sadrian */ 3485227364Sadrianstatic void 3486229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 3487229949Sadrian int fail) 3488227364Sadrian{ 3489227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3490227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3491227364Sadrian struct ath_node *an = ATH_NODE(ni); 3492227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3493227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3494227364Sadrian struct ath_tx_status ts; 3495227364Sadrian struct ieee80211_tx_ampdu *tap; 3496227364Sadrian ath_bufhead bf_q; 3497227364Sadrian ath_bufhead bf_cq; 3498227364Sadrian int seq_st, tx_ok; 3499227364Sadrian int hasba, isaggr; 3500227364Sadrian uint32_t ba[2]; 3501227364Sadrian struct ath_buf *bf, *bf_next; 3502227364Sadrian int ba_index; 3503227364Sadrian int drops = 0; 3504227364Sadrian int nframes = 0, nbad = 0, nf; 3505227364Sadrian int pktlen; 3506227364Sadrian /* XXX there's too much on the stack? */ 3507236038Sadrian struct ath_rc_series rc[ATH_RC_NUM]; 3508227364Sadrian int txseq; 3509227364Sadrian 3510227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3511227364Sadrian __func__, atid->hwq_depth); 3512227364Sadrian 3513227364Sadrian /* The TID state is kept behind the TXQ lock */ 3514227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3515227364Sadrian 3516227364Sadrian atid->hwq_depth--; 3517227364Sadrian if (atid->hwq_depth < 0) 3518227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3519227364Sadrian __func__, atid->hwq_depth); 3520227364Sadrian 3521227364Sadrian /* 3522227364Sadrian * Punt cleanup to the relevant function, not our problem now 3523227364Sadrian */ 3524227364Sadrian if (atid->cleanup_inprogress) { 3525227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3526227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3527227364Sadrian return; 3528227364Sadrian } 3529227364Sadrian 3530227364Sadrian /* 3531227364Sadrian * Take a copy; this may be needed -after- bf_first 3532227364Sadrian * has been completed and freed. 3533227364Sadrian */ 3534227364Sadrian ts = bf_first->bf_status.ds_txstat; 3535227364Sadrian /* 3536227364Sadrian * XXX for now, use the first frame in the aggregate for 3537227364Sadrian * XXX rate control completion; it's at least consistent. 3538227364Sadrian */ 3539227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3540227364Sadrian 3541227364Sadrian /* 3542235461Sadrian * Handle errors first! 3543235461Sadrian * 3544235461Sadrian * Here, handle _any_ error as a "exceeded retries" error. 3545235461Sadrian * Later on (when filtered frames are to be specially handled) 3546235461Sadrian * it'll have to be expanded. 3547227364Sadrian */ 3548235461Sadrian#if 0 3549227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3550235461Sadrian#endif 3551235461Sadrian if (ts.ts_status != 0) { 3552227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3553227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3554227364Sadrian return; 3555227364Sadrian } 3556227364Sadrian 3557227364Sadrian TAILQ_INIT(&bf_q); 3558227364Sadrian TAILQ_INIT(&bf_cq); 3559227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3560227364Sadrian 3561227364Sadrian /* 3562227364Sadrian * extract starting sequence and block-ack bitmap 3563227364Sadrian */ 3564227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3565227364Sadrian seq_st = ts.ts_seqnum; 3566227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3567227364Sadrian tx_ok = (ts.ts_status == 0); 3568227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3569227364Sadrian ba[0] = ts.ts_ba_low; 3570227364Sadrian ba[1] = ts.ts_ba_high; 3571227364Sadrian 3572227364Sadrian /* 3573227364Sadrian * Copy the TX completion status and the rate control 3574227364Sadrian * series from the first descriptor, as it may be freed 3575227364Sadrian * before the rate control code can get its grubby fingers 3576227364Sadrian * into things. 3577227364Sadrian */ 3578227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3579227364Sadrian 3580227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3581229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 3582229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3583227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3584227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3585227364Sadrian 3586227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3587227364Sadrian if (tid != ts.ts_tid) { 3588227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3589227364Sadrian __func__, tid, ts.ts_tid); 3590227364Sadrian tx_ok = 0; 3591227364Sadrian } 3592227364Sadrian 3593227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3594227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3595227364Sadrian device_printf(sc->sc_dev, 3596229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 3597229949Sadrian "seq_st=%d\n", 3598227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3599227364Sadrian /* XXX TODO: schedule an interface reset */ 3600238350Sjhb#ifdef ATH_DEBUG 3601238338Sadrian ath_printtxbuf(sc, bf_first, 3602238338Sadrian sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0); 3603238350Sjhb#endif 3604227364Sadrian } 3605227364Sadrian 3606227364Sadrian /* 3607227364Sadrian * Walk the list of frames, figure out which ones were correctly 3608227364Sadrian * sent and which weren't. 3609227364Sadrian */ 3610227364Sadrian bf = bf_first; 3611227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3612227364Sadrian 3613227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3614227364Sadrian bf_first = NULL; 3615227364Sadrian 3616227364Sadrian /* 3617227364Sadrian * Walk the list of completed frames and determine 3618227364Sadrian * which need to be completed and which need to be 3619227364Sadrian * retransmitted. 3620227364Sadrian * 3621227364Sadrian * For completed frames, the completion functions need 3622227364Sadrian * to be called at the end of this function as the last 3623227364Sadrian * node reference may free the node. 3624227364Sadrian * 3625227364Sadrian * Finally, since the TXQ lock can't be held during the 3626227364Sadrian * completion callback (to avoid lock recursion), 3627227364Sadrian * the completion calls have to be done outside of the 3628227364Sadrian * lock. 3629227364Sadrian */ 3630227364Sadrian while (bf) { 3631227364Sadrian nframes++; 3632229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 3633229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3634227364Sadrian bf_next = bf->bf_next; 3635227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3636227364Sadrian 3637227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3638227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3639227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3640227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3641227364Sadrian 3642227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3643227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 3644227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3645227364Sadrian bf->bf_state.bfs_dobaw = 0; 3646227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3647227364Sadrian device_printf(sc->sc_dev, 3648227364Sadrian "%s: wasn't added: seqno %d\n", 3649227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3650227364Sadrian bf->bf_next = NULL; 3651227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3652227364Sadrian } else { 3653227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3654227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3655227364Sadrian drops++; 3656227364Sadrian bf->bf_next = NULL; 3657227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3658227364Sadrian } 3659227364Sadrian nbad++; 3660227364Sadrian } 3661227364Sadrian bf = bf_next; 3662227364Sadrian } 3663227364Sadrian 3664227364Sadrian /* 3665227364Sadrian * Now that the BAW updates have been done, unlock 3666227364Sadrian * 3667227364Sadrian * txseq is grabbed before the lock is released so we 3668227364Sadrian * have a consistent view of what -was- in the BAW. 3669227364Sadrian * Anything after this point will not yet have been 3670227364Sadrian * TXed. 3671227364Sadrian */ 3672227364Sadrian txseq = tap->txa_start; 3673227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3674227364Sadrian 3675227364Sadrian if (nframes != nf) 3676227364Sadrian device_printf(sc->sc_dev, 3677227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3678227364Sadrian __func__, nframes, nf); 3679227364Sadrian 3680227364Sadrian /* 3681227364Sadrian * Now we know how many frames were bad, call the rate 3682227364Sadrian * control code. 3683227364Sadrian */ 3684227364Sadrian if (fail == 0) 3685229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 3686229949Sadrian nbad); 3687227364Sadrian 3688227364Sadrian /* 3689227364Sadrian * send bar if we dropped any frames 3690227364Sadrian */ 3691227364Sadrian if (drops) { 3692233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3693233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3694233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3695233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3696227364Sadrian } 3697227364Sadrian 3698234725Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3699234725Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3700234725Sadrian 3701234725Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3702234725Sadrian 3703227364Sadrian /* Prepend all frames to the beginning of the queue */ 3704227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3705227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3706227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3707227364Sadrian } 3708234725Sadrian 3709234725Sadrian /* 3710234725Sadrian * Reschedule to grab some further frames. 3711234725Sadrian */ 3712227364Sadrian ath_tx_tid_sched(sc, atid); 3713227364Sadrian 3714233908Sadrian /* 3715233908Sadrian * Send BAR if required 3716233908Sadrian */ 3717233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3718233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3719234725Sadrian 3720233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3721233908Sadrian 3722227364Sadrian /* Do deferred completion */ 3723227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3724227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3725227364Sadrian ath_tx_default_comp(sc, bf, 0); 3726227364Sadrian } 3727227364Sadrian} 3728227364Sadrian 3729227364Sadrian/* 3730227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3731227364Sadrian * session. 3732227364Sadrian * 3733227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3734227364Sadrian * ath_tx_draintxq(). 3735227364Sadrian */ 3736227364Sadrianstatic void 3737227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3738227364Sadrian{ 3739227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3740227364Sadrian struct ath_node *an = ATH_NODE(ni); 3741227364Sadrian int tid = bf->bf_state.bfs_tid; 3742227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3743227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3744227364Sadrian 3745227364Sadrian /* 3746227364Sadrian * Update rate control status here, before we possibly 3747227364Sadrian * punt to retry or cleanup. 3748227364Sadrian * 3749227364Sadrian * Do it outside of the TXQ lock. 3750227364Sadrian */ 3751233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3752227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3753227364Sadrian &bf->bf_status.ds_txstat, 3754227364Sadrian bf->bf_state.bfs_pktlen, 3755227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3756227364Sadrian 3757227364Sadrian /* 3758227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3759227364Sadrian * This unfortunately means that it's released and regrabbed 3760227364Sadrian * during retry and cleanup. That's rather inefficient. 3761227364Sadrian */ 3762227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3763227364Sadrian 3764227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3765227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3766227364Sadrian 3767229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 3768229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 3769229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 3770229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3771227364Sadrian 3772227364Sadrian atid->hwq_depth--; 3773227364Sadrian if (atid->hwq_depth < 0) 3774227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3775227364Sadrian __func__, atid->hwq_depth); 3776227364Sadrian 3777227364Sadrian /* 3778227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3779227364Sadrian * rather than handling it here. It's thus their 3780227364Sadrian * responsibility to clean up, call the completion 3781227364Sadrian * function in net80211, etc. 3782227364Sadrian */ 3783227364Sadrian if (atid->cleanup_inprogress) { 3784227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3785229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 3786229949Sadrian __func__); 3787227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3788227364Sadrian return; 3789227364Sadrian } 3790227364Sadrian 3791227364Sadrian /* 3792227364Sadrian * Don't bother with the retry check if all frames 3793227364Sadrian * are being failed (eg during queue deletion.) 3794227364Sadrian */ 3795235461Sadrian#if 0 3796227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3797235461Sadrian#endif 3798235461Sadrian if (fail == 0 && ts->ts_status != 0) { 3799227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3800229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 3801229949Sadrian __func__); 3802227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3803227364Sadrian return; 3804227364Sadrian } 3805227364Sadrian 3806227364Sadrian /* Success? Complete */ 3807227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3808227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3809227364Sadrian if (bf->bf_state.bfs_dobaw) { 3810227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3811227364Sadrian bf->bf_state.bfs_dobaw = 0; 3812227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3813227364Sadrian device_printf(sc->sc_dev, 3814227364Sadrian "%s: wasn't added: seqno %d\n", 3815227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3816227364Sadrian } 3817227364Sadrian 3818233908Sadrian /* 3819233908Sadrian * Send BAR if required 3820233908Sadrian */ 3821233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3822233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3823233908Sadrian 3824227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3825227364Sadrian 3826227364Sadrian ath_tx_default_comp(sc, bf, fail); 3827227364Sadrian /* bf is freed at this point */ 3828227364Sadrian} 3829227364Sadrian 3830227364Sadrianvoid 3831227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3832227364Sadrian{ 3833227364Sadrian if (bf->bf_state.bfs_aggr) 3834227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 3835227364Sadrian else 3836227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 3837227364Sadrian} 3838227364Sadrian 3839227364Sadrian/* 3840227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3841227364Sadrian * 3842227364Sadrian * This is the aggregate version. 3843227364Sadrian */ 3844227364Sadrianvoid 3845227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 3846227364Sadrian struct ath_tid *tid) 3847227364Sadrian{ 3848227364Sadrian struct ath_buf *bf; 3849227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3850227364Sadrian struct ieee80211_tx_ampdu *tap; 3851227364Sadrian struct ieee80211_node *ni = &an->an_node; 3852227364Sadrian ATH_AGGR_STATUS status; 3853227364Sadrian ath_bufhead bf_q; 3854227364Sadrian 3855227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 3856227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3857227364Sadrian 3858227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3859227364Sadrian 3860227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 3861227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 3862227364Sadrian __func__); 3863227364Sadrian 3864227364Sadrian for (;;) { 3865227364Sadrian status = ATH_AGGR_DONE; 3866227364Sadrian 3867227364Sadrian /* 3868227364Sadrian * If the upper layer has paused the TID, don't 3869227364Sadrian * queue any further packets. 3870227364Sadrian * 3871227364Sadrian * This can also occur from the completion task because 3872227364Sadrian * of packet loss; but as its serialised with this code, 3873227364Sadrian * it won't "appear" half way through queuing packets. 3874227364Sadrian */ 3875227364Sadrian if (tid->paused) 3876227364Sadrian break; 3877227364Sadrian 3878227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3879227364Sadrian if (bf == NULL) { 3880227364Sadrian break; 3881227364Sadrian } 3882227364Sadrian 3883227364Sadrian /* 3884227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 3885227364Sadrian * data frame), schedule it directly; continue. 3886227364Sadrian */ 3887227364Sadrian if (! bf->bf_state.bfs_dobaw) { 3888229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3889229949Sadrian "%s: non-baw packet\n", 3890227364Sadrian __func__); 3891227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3892227364Sadrian bf->bf_state.bfs_aggr = 0; 3893227364Sadrian ath_tx_do_ratelookup(sc, bf); 3894233989Sadrian ath_tx_calc_duration(sc, bf); 3895233989Sadrian ath_tx_calc_protection(sc, bf); 3896233989Sadrian ath_tx_set_rtscts(sc, bf); 3897227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3898227364Sadrian ath_tx_setds(sc, bf); 3899238885Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3900227364Sadrian ath_tx_chaindesclist(sc, bf); 3901227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3902227364Sadrian 3903227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 3904227364Sadrian 3905227364Sadrian /* Queue the packet; continue */ 3906227364Sadrian goto queuepkt; 3907227364Sadrian } 3908227364Sadrian 3909227364Sadrian TAILQ_INIT(&bf_q); 3910227364Sadrian 3911227364Sadrian /* 3912227364Sadrian * Do a rate control lookup on the first frame in the 3913227364Sadrian * list. The rate control code needs that to occur 3914227364Sadrian * before it can determine whether to TX. 3915227364Sadrian * It's inaccurate because the rate control code doesn't 3916227364Sadrian * really "do" aggregate lookups, so it only considers 3917227364Sadrian * the size of the first frame. 3918227364Sadrian */ 3919227364Sadrian ath_tx_do_ratelookup(sc, bf); 3920227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 3921227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 3922233989Sadrian 3923233989Sadrian ath_tx_calc_duration(sc, bf); 3924233989Sadrian ath_tx_calc_protection(sc, bf); 3925233989Sadrian 3926233989Sadrian ath_tx_set_rtscts(sc, bf); 3927227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3928227364Sadrian 3929227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 3930227364Sadrian 3931227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3932227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 3933227364Sadrian 3934227364Sadrian /* 3935227364Sadrian * No frames to be picked up - out of BAW 3936227364Sadrian */ 3937227364Sadrian if (TAILQ_EMPTY(&bf_q)) 3938227364Sadrian break; 3939227364Sadrian 3940227364Sadrian /* 3941227364Sadrian * This assumes that the descriptor list in the ath_bufhead 3942227364Sadrian * are already linked together via bf_next pointers. 3943227364Sadrian */ 3944227364Sadrian bf = TAILQ_FIRST(&bf_q); 3945227364Sadrian 3946233989Sadrian if (status == ATH_AGGR_8K_LIMITED) 3947233989Sadrian sc->sc_aggr_stats.aggr_rts_aggr_limited++; 3948233989Sadrian 3949227364Sadrian /* 3950227364Sadrian * If it's the only frame send as non-aggregate 3951227364Sadrian * assume that ath_tx_form_aggr() has checked 3952227364Sadrian * whether it's in the BAW and added it appropriately. 3953227364Sadrian */ 3954227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 3955227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3956227364Sadrian "%s: single-frame aggregate\n", __func__); 3957227364Sadrian bf->bf_state.bfs_aggr = 0; 3958227364Sadrian ath_tx_setds(sc, bf); 3959238885Sadrian ath_tx_set_ratectrl(sc, ni, bf); 3960227364Sadrian ath_tx_chaindesclist(sc, bf); 3961227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3962227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 3963227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 3964227364Sadrian else 3965227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 3966227364Sadrian } else { 3967227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3968229949Sadrian "%s: multi-frame aggregate: %d frames, " 3969229949Sadrian "length %d\n", 3970227364Sadrian __func__, bf->bf_state.bfs_nframes, 3971227364Sadrian bf->bf_state.bfs_al); 3972227364Sadrian bf->bf_state.bfs_aggr = 1; 3973227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 3974227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 3975227364Sadrian 3976227364Sadrian /* 3977233989Sadrian * Calculate the duration/protection as required. 3978233989Sadrian */ 3979233989Sadrian ath_tx_calc_duration(sc, bf); 3980233989Sadrian ath_tx_calc_protection(sc, bf); 3981233989Sadrian 3982233989Sadrian /* 3983227364Sadrian * Update the rate and rtscts information based on the 3984227364Sadrian * rate decision made by the rate control code; 3985227364Sadrian * the first frame in the aggregate needs it. 3986227364Sadrian */ 3987227364Sadrian ath_tx_set_rtscts(sc, bf); 3988227364Sadrian 3989227364Sadrian /* 3990227364Sadrian * Setup the relevant descriptor fields 3991227364Sadrian * for aggregation. The first descriptor 3992227364Sadrian * already points to the rest in the chain. 3993227364Sadrian */ 3994227364Sadrian ath_tx_setds_11n(sc, bf); 3995227364Sadrian 3996227364Sadrian /* 3997227364Sadrian * setup first desc with rate and aggr info 3998227364Sadrian */ 3999227364Sadrian ath_tx_set_ratectrl(sc, ni, bf); 4000227364Sadrian } 4001227364Sadrian queuepkt: 4002227364Sadrian //txq = bf->bf_state.bfs_txq; 4003227364Sadrian 4004227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 4005227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 4006227364Sadrian 4007227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 4008227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 4009227364Sadrian 4010227364Sadrian /* Punt to txq */ 4011227364Sadrian ath_tx_handoff(sc, txq, bf); 4012227364Sadrian 4013227364Sadrian /* Track outstanding buffer count to hardware */ 4014227364Sadrian /* aggregates are "one" buffer */ 4015227364Sadrian tid->hwq_depth++; 4016227364Sadrian 4017227364Sadrian /* 4018227364Sadrian * Break out if ath_tx_form_aggr() indicated 4019227364Sadrian * there can't be any further progress (eg BAW is full.) 4020227364Sadrian * Checking for an empty txq is done above. 4021227364Sadrian * 4022227364Sadrian * XXX locking on txq here? 4023227364Sadrian */ 4024227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 4025227364Sadrian status == ATH_AGGR_BAW_CLOSED) 4026227364Sadrian break; 4027227364Sadrian } 4028227364Sadrian} 4029227364Sadrian 4030227364Sadrian/* 4031227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4032227364Sadrian */ 4033227364Sadrianvoid 4034227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 4035227364Sadrian struct ath_tid *tid) 4036227364Sadrian{ 4037227364Sadrian struct ath_buf *bf; 4038227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4039227364Sadrian struct ieee80211_node *ni = &an->an_node; 4040227364Sadrian 4041227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 4042227364Sadrian __func__, an, tid->tid); 4043227364Sadrian 4044227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4045227364Sadrian 4046227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 4047227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 4048227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 4049227364Sadrian __func__, tid->tid); 4050227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 4051227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 4052227364Sadrian __func__, tid->tid); 4053227364Sadrian 4054227364Sadrian for (;;) { 4055227364Sadrian 4056227364Sadrian /* 4057227364Sadrian * If the upper layers have paused the TID, don't 4058227364Sadrian * queue any further packets. 4059227364Sadrian */ 4060227364Sadrian if (tid->paused) 4061227364Sadrian break; 4062227364Sadrian 4063227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 4064227364Sadrian if (bf == NULL) { 4065227364Sadrian break; 4066227364Sadrian } 4067227364Sadrian 4068227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 4069227364Sadrian 4070227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 4071227364Sadrian 4072227364Sadrian /* Sanity check! */ 4073227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 4074227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 4075227364Sadrian " tid %d\n", 4076227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 4077227364Sadrian } 4078227364Sadrian /* Normal completion handler */ 4079227364Sadrian bf->bf_comp = ath_tx_normal_comp; 4080227364Sadrian 4081227364Sadrian /* Program descriptors + rate control */ 4082227364Sadrian ath_tx_do_ratelookup(sc, bf); 4083233989Sadrian ath_tx_calc_duration(sc, bf); 4084233989Sadrian ath_tx_calc_protection(sc, bf); 4085233989Sadrian ath_tx_set_rtscts(sc, bf); 4086227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4087227364Sadrian ath_tx_setds(sc, bf); 4088238885Sadrian ath_tx_set_ratectrl(sc, ni, bf); 4089227364Sadrian ath_tx_chaindesclist(sc, bf); 4090227364Sadrian 4091227364Sadrian /* Track outstanding buffer count to hardware */ 4092227364Sadrian /* aggregates are "one" buffer */ 4093227364Sadrian tid->hwq_depth++; 4094227364Sadrian 4095227364Sadrian /* Punt to hardware or software txq */ 4096227364Sadrian ath_tx_handoff(sc, txq, bf); 4097227364Sadrian } 4098227364Sadrian} 4099227364Sadrian 4100227364Sadrian/* 4101227364Sadrian * Schedule some packets to the given hardware queue. 4102227364Sadrian * 4103227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 4104227364Sadrian * with queued traffic) and attempts to schedule traffic 4105227364Sadrian * from them. 4106227364Sadrian * 4107227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 4108227364Sadrian * added to the end of the queue after some frames have been 4109227364Sadrian * scheduled. 4110227364Sadrian */ 4111227364Sadrianvoid 4112227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 4113227364Sadrian{ 4114227364Sadrian struct ath_tid *tid, *next, *last; 4115227364Sadrian 4116227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4117227364Sadrian 4118227364Sadrian /* 4119227364Sadrian * Don't schedule if the hardware queue is busy. 4120227364Sadrian * This (hopefully) gives some more time to aggregate 4121227364Sadrian * some packets in the aggregation queue. 4122227364Sadrian */ 4123227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4124227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 4125227364Sadrian return; 4126227364Sadrian } 4127227364Sadrian 4128227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 4129227364Sadrian 4130227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 4131227364Sadrian /* 4132227364Sadrian * Suspend paused queues here; they'll be resumed 4133227364Sadrian * once the addba completes or times out. 4134227364Sadrian */ 4135227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 4136227364Sadrian __func__, tid->tid, tid->paused); 4137227364Sadrian ath_tx_tid_unsched(sc, tid); 4138227364Sadrian if (tid->paused) { 4139227364Sadrian continue; 4140227364Sadrian } 4141227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 4142227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 4143227364Sadrian else 4144227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 4145227364Sadrian 4146227364Sadrian /* Not empty? Re-schedule */ 4147227364Sadrian if (tid->axq_depth != 0) 4148227364Sadrian ath_tx_tid_sched(sc, tid); 4149227364Sadrian 4150227364Sadrian /* Give the software queue time to aggregate more packets */ 4151227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4152227364Sadrian break; 4153227364Sadrian } 4154227364Sadrian 4155227364Sadrian /* 4156227364Sadrian * If this was the last entry on the original list, stop. 4157227364Sadrian * Otherwise nodes that have been rescheduled onto the end 4158227364Sadrian * of the TID FIFO list will just keep being rescheduled. 4159227364Sadrian */ 4160227364Sadrian if (tid == last) 4161227364Sadrian break; 4162227364Sadrian } 4163227364Sadrian} 4164227364Sadrian 4165227364Sadrian/* 4166227364Sadrian * TX addba handling 4167227364Sadrian */ 4168227364Sadrian 4169227364Sadrian/* 4170227364Sadrian * Return net80211 TID struct pointer, or NULL for none 4171227364Sadrian */ 4172227364Sadrianstruct ieee80211_tx_ampdu * 4173227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 4174227364Sadrian{ 4175227364Sadrian struct ieee80211_node *ni = &an->an_node; 4176227364Sadrian struct ieee80211_tx_ampdu *tap; 4177227364Sadrian 4178227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4179227364Sadrian return NULL; 4180227364Sadrian 4181234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 4182227364Sadrian return tap; 4183227364Sadrian} 4184227364Sadrian 4185227364Sadrian/* 4186227364Sadrian * Is AMPDU-TX running? 4187227364Sadrian */ 4188227364Sadrianstatic int 4189227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 4190227364Sadrian{ 4191227364Sadrian struct ieee80211_tx_ampdu *tap; 4192227364Sadrian 4193227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4194227364Sadrian return 0; 4195227364Sadrian 4196227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4197227364Sadrian if (tap == NULL) 4198227364Sadrian return 0; /* Not valid; default to not running */ 4199227364Sadrian 4200227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 4201227364Sadrian} 4202227364Sadrian 4203227364Sadrian/* 4204227364Sadrian * Is AMPDU-TX negotiation pending? 4205227364Sadrian */ 4206227364Sadrianstatic int 4207227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 4208227364Sadrian{ 4209227364Sadrian struct ieee80211_tx_ampdu *tap; 4210227364Sadrian 4211227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4212227364Sadrian return 0; 4213227364Sadrian 4214227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4215227364Sadrian if (tap == NULL) 4216227364Sadrian return 0; /* Not valid; default to not pending */ 4217227364Sadrian 4218227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 4219227364Sadrian} 4220227364Sadrian 4221227364Sadrian/* 4222227364Sadrian * Is AMPDU-TX pending for the given TID? 4223227364Sadrian */ 4224227364Sadrian 4225227364Sadrian 4226227364Sadrian/* 4227227364Sadrian * Method to handle sending an ADDBA request. 4228227364Sadrian * 4229227364Sadrian * We tap this so the relevant flags can be set to pause the TID 4230227364Sadrian * whilst waiting for the response. 4231227364Sadrian * 4232227364Sadrian * XXX there's no timeout handler we can override? 4233227364Sadrian */ 4234227364Sadrianint 4235227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4236227364Sadrian int dialogtoken, int baparamset, int batimeout) 4237227364Sadrian{ 4238227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4239234324Sadrian int tid = tap->txa_tid; 4240227364Sadrian struct ath_node *an = ATH_NODE(ni); 4241227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4242227364Sadrian 4243227364Sadrian /* 4244227364Sadrian * XXX danger Will Robinson! 4245227364Sadrian * 4246227364Sadrian * Although the taskqueue may be running and scheduling some more 4247227364Sadrian * packets, these should all be _before_ the addba sequence number. 4248227364Sadrian * However, net80211 will keep self-assigning sequence numbers 4249227364Sadrian * until addba has been negotiated. 4250227364Sadrian * 4251227364Sadrian * In the past, these packets would be "paused" (which still works 4252227364Sadrian * fine, as they're being scheduled to the driver in the same 4253227364Sadrian * serialised method which is calling the addba request routine) 4254227364Sadrian * and when the aggregation session begins, they'll be dequeued 4255227364Sadrian * as aggregate packets and added to the BAW. However, now there's 4256227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 4257227364Sadrian * packets. Thus they never get included in the BAW tracking and 4258227364Sadrian * this can cause the initial burst of packets after the addba 4259227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 4260227364Sadrian * 4261227364Sadrian * The "eventual" solution should be to tag these packets with 4262227364Sadrian * dobaw. Although net80211 has given us a sequence number, 4263227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 4264227364Sadrian * fall within it. 4265227364Sadrian */ 4266235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4267235774Sadrian /* 4268235774Sadrian * This is a bit annoying. Until net80211 HT code inherits some 4269235774Sadrian * (any) locking, we may have this called in parallel BUT only 4270235774Sadrian * one response/timeout will be called. Grr. 4271235774Sadrian */ 4272235774Sadrian if (atid->addba_tx_pending == 0) { 4273235774Sadrian ath_tx_tid_pause(sc, atid); 4274235774Sadrian atid->addba_tx_pending = 1; 4275235774Sadrian } 4276235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4277227364Sadrian 4278227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4279227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 4280227364Sadrian __func__, dialogtoken, baparamset, batimeout); 4281227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4282227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4283227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4284227364Sadrian 4285227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 4286227364Sadrian batimeout); 4287227364Sadrian} 4288227364Sadrian 4289227364Sadrian/* 4290227364Sadrian * Handle an ADDBA response. 4291227364Sadrian * 4292227364Sadrian * We unpause the queue so TX'ing can resume. 4293227364Sadrian * 4294227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 4295227364Sadrian * aggregate or not) so the BAW is updated. 4296227364Sadrian * 4297227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 4298227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 4299227364Sadrian * edge won't match the ni->ni_txseq. 4300227364Sadrian * 4301227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 4302227364Sadrian * ni->ni_txseq. 4303227364Sadrian * 4304227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 4305227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 4306227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 4307227364Sadrian * window. 4308227364Sadrian */ 4309227364Sadrianint 4310227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4311227364Sadrian int status, int code, int batimeout) 4312227364Sadrian{ 4313227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4314234324Sadrian int tid = tap->txa_tid; 4315227364Sadrian struct ath_node *an = ATH_NODE(ni); 4316227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4317227364Sadrian int r; 4318227364Sadrian 4319227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4320227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 4321227364Sadrian status, code, batimeout); 4322227364Sadrian 4323227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4324227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4325227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4326227364Sadrian 4327227364Sadrian /* 4328227364Sadrian * Call this first, so the interface flags get updated 4329227364Sadrian * before the TID is unpaused. Otherwise a race condition 4330227364Sadrian * exists where the unpaused TID still doesn't yet have 4331227364Sadrian * IEEE80211_AGGR_RUNNING set. 4332227364Sadrian */ 4333227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 4334227364Sadrian 4335227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4336235774Sadrian atid->addba_tx_pending = 0; 4337227364Sadrian /* 4338227364Sadrian * XXX dirty! 4339227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 4340227364Sadrian * Read above for more information. 4341227364Sadrian */ 4342227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 4343227364Sadrian ath_tx_tid_resume(sc, atid); 4344227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4345227364Sadrian return r; 4346227364Sadrian} 4347227364Sadrian 4348227364Sadrian 4349227364Sadrian/* 4350227364Sadrian * Stop ADDBA on a queue. 4351237593Sadrian * 4352237593Sadrian * This can be called whilst BAR TX is currently active on the queue, 4353237593Sadrian * so make sure this is unblocked before continuing. 4354227364Sadrian */ 4355227364Sadrianvoid 4356227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 4357227364Sadrian{ 4358227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4359234324Sadrian int tid = tap->txa_tid; 4360227364Sadrian struct ath_node *an = ATH_NODE(ni); 4361227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4362227364Sadrian 4363227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 4364227364Sadrian 4365237593Sadrian /* 4366237593Sadrian * Pause TID traffic early, so there aren't any races 4367237593Sadrian * Unblock the pending BAR held traffic, if it's currently paused. 4368237593Sadrian */ 4369235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4370227364Sadrian ath_tx_tid_pause(sc, atid); 4371237593Sadrian if (atid->bar_wait) { 4372237593Sadrian /* 4373237593Sadrian * bar_unsuspend() expects bar_tx == 1, as it should be 4374237593Sadrian * called from the TX completion path. This quietens 4375237593Sadrian * the warning. It's cleared for us anyway. 4376237593Sadrian */ 4377237593Sadrian atid->bar_tx = 1; 4378237593Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4379237593Sadrian } 4380235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4381227364Sadrian 4382227364Sadrian /* There's no need to hold the TXQ lock here */ 4383227364Sadrian sc->sc_addba_stop(ni, tap); 4384227364Sadrian 4385227364Sadrian /* 4386235749Sadrian * ath_tx_tid_cleanup will resume the TID if possible, otherwise 4387227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 4388227364Sadrian * things have been cleaned up. 4389227364Sadrian */ 4390235749Sadrian ath_tx_tid_cleanup(sc, an, tid); 4391227364Sadrian} 4392227364Sadrian 4393227364Sadrian/* 4394227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 4395227364Sadrian * it simply tears down the aggregation session. Ew. 4396227364Sadrian * 4397227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 4398227364Sadrian * ic->ic_addba_stop(). 4399227364Sadrian * 4400227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 4401227364Sadrian * XXX BAR TX success or failure should be better handled! 4402227364Sadrian */ 4403227364Sadrianvoid 4404227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4405227364Sadrian int status) 4406227364Sadrian{ 4407227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4408234324Sadrian int tid = tap->txa_tid; 4409227364Sadrian struct ath_node *an = ATH_NODE(ni); 4410227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4411227364Sadrian int attempts = tap->txa_attempts; 4412227364Sadrian 4413235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 4414235676Sadrian "%s: called; tap=%p, atid=%p, txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n", 4415235491Sadrian __func__, 4416235676Sadrian tap, 4417235676Sadrian atid, 4418235676Sadrian tap->txa_tid, 4419235676Sadrian atid->tid, 4420235491Sadrian status, 4421235491Sadrian attempts); 4422227364Sadrian 4423227364Sadrian /* Note: This may update the BAW details */ 4424227364Sadrian sc->sc_bar_response(ni, tap, status); 4425227364Sadrian 4426227364Sadrian /* Unpause the TID */ 4427227364Sadrian /* 4428227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 4429227364Sadrian * XXX to a non-aggregate session. So we must unpause the 4430227364Sadrian * XXX TID here or it'll never be done. 4431227364Sadrian */ 4432227364Sadrian if (status == 0 || attempts == 50) { 4433227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4434233908Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4435227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4436227364Sadrian } 4437227364Sadrian} 4438227364Sadrian 4439227364Sadrian/* 4440227364Sadrian * This is called whenever the pending ADDBA request times out. 4441227364Sadrian * Unpause and reschedule the TID. 4442227364Sadrian */ 4443227364Sadrianvoid 4444227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 4445227364Sadrian struct ieee80211_tx_ampdu *tap) 4446227364Sadrian{ 4447227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4448234324Sadrian int tid = tap->txa_tid; 4449227364Sadrian struct ath_node *an = ATH_NODE(ni); 4450227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4451227364Sadrian 4452227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4453227364Sadrian "%s: called; resuming\n", __func__); 4454227364Sadrian 4455235774Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4456235774Sadrian atid->addba_tx_pending = 0; 4457235774Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4458235774Sadrian 4459227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 4460227364Sadrian sc->sc_addba_response_timeout(ni, tap); 4461227364Sadrian 4462227364Sadrian /* Unpause the TID; which reschedules it */ 4463227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4464227364Sadrian ath_tx_tid_resume(sc, atid); 4465227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4466227364Sadrian} 4467238710Sadrian 4468238710Sadrianstatic int 4469238710Sadrianath_legacy_dma_txsetup(struct ath_softc *sc) 4470238710Sadrian{ 4471238710Sadrian 4472238710Sadrian /* nothing new needed */ 4473238710Sadrian return (0); 4474238710Sadrian} 4475238710Sadrian 4476238710Sadrianstatic int 4477238710Sadrianath_legacy_dma_txteardown(struct ath_softc *sc) 4478238710Sadrian{ 4479238710Sadrian 4480238710Sadrian /* nothing new needed */ 4481238710Sadrian return (0); 4482238710Sadrian} 4483238710Sadrian 4484238710Sadrianvoid 4485238710Sadrianath_xmit_setup_legacy(struct ath_softc *sc) 4486238710Sadrian{ 4487238729Sadrian /* 4488238729Sadrian * For now, just set the descriptor length to sizeof(ath_desc); 4489238729Sadrian * worry about extracting the real length out of the HAL later. 4490238729Sadrian */ 4491238729Sadrian sc->sc_tx_desclen = sizeof(struct ath_desc); 4492238729Sadrian sc->sc_tx_statuslen = 0; 4493238729Sadrian sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */ 4494238710Sadrian 4495238710Sadrian sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup; 4496238710Sadrian sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown; 4497238930Sadrian 4498238930Sadrian sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart; 4499238930Sadrian sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff; 4500238710Sadrian} 4501