if_ath_tx.c revision 248988
1218065Sadrian/*- 2218065Sadrian * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 3240592Sadrian * Copyright (c) 2010-2012 Adrian Chadd, Xenion Pty Ltd 4218065Sadrian * All rights reserved. 5218065Sadrian * 6218065Sadrian * Redistribution and use in source and binary forms, with or without 7218065Sadrian * modification, are permitted provided that the following conditions 8218065Sadrian * are met: 9218065Sadrian * 1. Redistributions of source code must retain the above copyright 10218065Sadrian * notice, this list of conditions and the following disclaimer, 11218065Sadrian * without modification. 12218065Sadrian * 2. Redistributions in binary form must reproduce at minimum a disclaimer 13218065Sadrian * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 14218065Sadrian * redistribution must be conditioned upon including a substantially 15218065Sadrian * similar Disclaimer requirement for further binary redistribution. 16218065Sadrian * 17218065Sadrian * NO WARRANTY 18218065Sadrian * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19218065Sadrian * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20218065Sadrian * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 21218065Sadrian * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 22218065Sadrian * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 23218065Sadrian * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24218065Sadrian * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25218065Sadrian * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 26218065Sadrian * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27218065Sadrian * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28218065Sadrian * THE POSSIBILITY OF SUCH DAMAGES. 29218065Sadrian */ 30218065Sadrian 31218065Sadrian#include <sys/cdefs.h> 32218065Sadrian__FBSDID("$FreeBSD: head/sys/dev/ath/if_ath_tx.c 248988 2013-04-01 20:57:13Z adrian $"); 33218065Sadrian 34218065Sadrian/* 35218065Sadrian * Driver for the Atheros Wireless LAN controller. 36218065Sadrian * 37218065Sadrian * This software is derived from work of Atsushi Onoe; his contribution 38218065Sadrian * is greatly appreciated. 39218065Sadrian */ 40218065Sadrian 41218065Sadrian#include "opt_inet.h" 42218065Sadrian#include "opt_ath.h" 43218065Sadrian#include "opt_wlan.h" 44218065Sadrian 45218065Sadrian#include <sys/param.h> 46218065Sadrian#include <sys/systm.h> 47218065Sadrian#include <sys/sysctl.h> 48218065Sadrian#include <sys/mbuf.h> 49218065Sadrian#include <sys/malloc.h> 50218065Sadrian#include <sys/lock.h> 51218065Sadrian#include <sys/mutex.h> 52218065Sadrian#include <sys/kernel.h> 53218065Sadrian#include <sys/socket.h> 54218065Sadrian#include <sys/sockio.h> 55218065Sadrian#include <sys/errno.h> 56218065Sadrian#include <sys/callout.h> 57218065Sadrian#include <sys/bus.h> 58218065Sadrian#include <sys/endian.h> 59218065Sadrian#include <sys/kthread.h> 60218065Sadrian#include <sys/taskqueue.h> 61218065Sadrian#include <sys/priv.h> 62218065Sadrian 63218065Sadrian#include <machine/bus.h> 64218065Sadrian 65218065Sadrian#include <net/if.h> 66218065Sadrian#include <net/if_dl.h> 67218065Sadrian#include <net/if_media.h> 68218065Sadrian#include <net/if_types.h> 69218065Sadrian#include <net/if_arp.h> 70218065Sadrian#include <net/ethernet.h> 71218065Sadrian#include <net/if_llc.h> 72218065Sadrian 73218065Sadrian#include <net80211/ieee80211_var.h> 74218065Sadrian#include <net80211/ieee80211_regdomain.h> 75218065Sadrian#ifdef IEEE80211_SUPPORT_SUPERG 76218065Sadrian#include <net80211/ieee80211_superg.h> 77218065Sadrian#endif 78218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 79218065Sadrian#include <net80211/ieee80211_tdma.h> 80218065Sadrian#endif 81227364Sadrian#include <net80211/ieee80211_ht.h> 82218065Sadrian 83218065Sadrian#include <net/bpf.h> 84218065Sadrian 85218065Sadrian#ifdef INET 86218065Sadrian#include <netinet/in.h> 87218065Sadrian#include <netinet/if_ether.h> 88218065Sadrian#endif 89218065Sadrian 90218065Sadrian#include <dev/ath/if_athvar.h> 91218065Sadrian#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */ 92218065Sadrian#include <dev/ath/ath_hal/ah_diagcodes.h> 93218065Sadrian 94218065Sadrian#include <dev/ath/if_ath_debug.h> 95218065Sadrian 96218065Sadrian#ifdef ATH_TX99_DIAG 97218065Sadrian#include <dev/ath/ath_tx99/ath_tx99.h> 98218065Sadrian#endif 99218065Sadrian 100218065Sadrian#include <dev/ath/if_ath_misc.h> 101218065Sadrian#include <dev/ath/if_ath_tx.h> 102218240Sadrian#include <dev/ath/if_ath_tx_ht.h> 103218065Sadrian 104242782Sadrian#ifdef ATH_DEBUG_ALQ 105242782Sadrian#include <dev/ath/if_ath_alq.h> 106242782Sadrian#endif 107242782Sadrian 108218154Sadrian/* 109227364Sadrian * How many retries to perform in software 110227364Sadrian */ 111227364Sadrian#define SWMAX_RETRIES 10 112227364Sadrian 113240946Sadrian/* 114240946Sadrian * What queue to throw the non-QoS TID traffic into 115240946Sadrian */ 116240946Sadrian#define ATH_NONQOS_TID_AC WME_AC_VO 117240946Sadrian 118241170Sadrian#if 0 119241170Sadrianstatic int ath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an); 120241170Sadrian#endif 121227364Sadrianstatic int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, 122227364Sadrian int tid); 123227364Sadrianstatic int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, 124227364Sadrian int tid); 125236872Sadrianstatic ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc, 126236872Sadrian struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0); 127227364Sadrianstatic int ath_tx_action_frame_override_queue(struct ath_softc *sc, 128227364Sadrian struct ieee80211_node *ni, struct mbuf *m0, int *tid); 129240639Sadrianstatic struct ath_buf * 130240639Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 131240639Sadrian struct ath_tid *tid, struct ath_buf *bf); 132227364Sadrian 133243162Sadrian#ifdef ATH_DEBUG_ALQ 134243162Sadrianvoid 135243162Sadrianath_tx_alq_post(struct ath_softc *sc, struct ath_buf *bf_first) 136243162Sadrian{ 137243162Sadrian struct ath_buf *bf; 138243162Sadrian int i, n; 139243162Sadrian const char *ds; 140243162Sadrian 141243162Sadrian /* XXX we should skip out early if debugging isn't enabled! */ 142243162Sadrian bf = bf_first; 143243162Sadrian 144243162Sadrian while (bf != NULL) { 145243162Sadrian /* XXX should ensure bf_nseg > 0! */ 146243162Sadrian if (bf->bf_nseg == 0) 147243162Sadrian break; 148243162Sadrian n = ((bf->bf_nseg - 1) / sc->sc_tx_nmaps) + 1; 149243162Sadrian for (i = 0, ds = (const char *) bf->bf_desc; 150243162Sadrian i < n; 151243162Sadrian i++, ds += sc->sc_tx_desclen) { 152243162Sadrian if_ath_alq_post(&sc->sc_alq, 153243162Sadrian ATH_ALQ_EDMA_TXDESC, 154243162Sadrian sc->sc_tx_desclen, 155243162Sadrian ds); 156243162Sadrian } 157243162Sadrian bf = bf->bf_next; 158243162Sadrian } 159243162Sadrian} 160243162Sadrian#endif /* ATH_DEBUG_ALQ */ 161243162Sadrian 162227364Sadrian/* 163218154Sadrian * Whether to use the 11n rate scenario functions or not 164218154Sadrian */ 165218154Sadrianstatic inline int 166218154Sadrianath_tx_is_11n(struct ath_softc *sc) 167218154Sadrian{ 168239198Sadrian return ((sc->sc_ah->ah_magic == 0x20065416) || 169239198Sadrian (sc->sc_ah->ah_magic == 0x19741014)); 170218154Sadrian} 171218154Sadrian 172227364Sadrian/* 173227364Sadrian * Obtain the current TID from the given frame. 174227364Sadrian * 175227364Sadrian * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.) 176227364Sadrian * This has implications for which AC/priority the packet is placed 177227364Sadrian * in. 178227364Sadrian */ 179227364Sadrianstatic int 180227364Sadrianath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0) 181227364Sadrian{ 182227364Sadrian const struct ieee80211_frame *wh; 183227364Sadrian int pri = M_WME_GETAC(m0); 184227364Sadrian 185227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 186227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 187227364Sadrian return IEEE80211_NONQOS_TID; 188227364Sadrian else 189227364Sadrian return WME_AC_TO_TID(pri); 190227364Sadrian} 191227364Sadrian 192240639Sadrianstatic void 193240639Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 194240639Sadrian{ 195240639Sadrian struct ieee80211_frame *wh; 196240639Sadrian 197240639Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 198240639Sadrian /* Only update/resync if needed */ 199240639Sadrian if (bf->bf_state.bfs_isretried == 0) { 200240639Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 201240639Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 202240639Sadrian BUS_DMASYNC_PREWRITE); 203240639Sadrian } 204240639Sadrian bf->bf_state.bfs_isretried = 1; 205240639Sadrian bf->bf_state.bfs_retries ++; 206240639Sadrian} 207240639Sadrian 208227364Sadrian/* 209227364Sadrian * Determine what the correct AC queue for the given frame 210227364Sadrian * should be. 211227364Sadrian * 212227364Sadrian * This code assumes that the TIDs map consistently to 213227364Sadrian * the underlying hardware (or software) ath_txq. 214227364Sadrian * Since the sender may try to set an AC which is 215227364Sadrian * arbitrary, non-QoS TIDs may end up being put on 216227364Sadrian * completely different ACs. There's no way to put a 217227364Sadrian * TID into multiple ath_txq's for scheduling, so 218227364Sadrian * for now we override the AC/TXQ selection and set 219227364Sadrian * non-QOS TID frames into the BE queue. 220227364Sadrian * 221227364Sadrian * This may be completely incorrect - specifically, 222227364Sadrian * some management frames may end up out of order 223227364Sadrian * compared to the QoS traffic they're controlling. 224227364Sadrian * I'll look into this later. 225227364Sadrian */ 226227364Sadrianstatic int 227227364Sadrianath_tx_getac(struct ath_softc *sc, const struct mbuf *m0) 228227364Sadrian{ 229227364Sadrian const struct ieee80211_frame *wh; 230227364Sadrian int pri = M_WME_GETAC(m0); 231227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 232227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh)) 233227364Sadrian return pri; 234227364Sadrian 235240946Sadrian return ATH_NONQOS_TID_AC; 236227364Sadrian} 237227364Sadrian 238218065Sadrianvoid 239218065Sadrianath_txfrag_cleanup(struct ath_softc *sc, 240218065Sadrian ath_bufhead *frags, struct ieee80211_node *ni) 241218065Sadrian{ 242218065Sadrian struct ath_buf *bf, *next; 243218065Sadrian 244218065Sadrian ATH_TXBUF_LOCK_ASSERT(sc); 245218065Sadrian 246227344Sadrian TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) { 247218065Sadrian /* NB: bf assumed clean */ 248227344Sadrian TAILQ_REMOVE(frags, bf, bf_list); 249236993Sadrian ath_returnbuf_head(sc, bf); 250218065Sadrian ieee80211_node_decref(ni); 251218065Sadrian } 252218065Sadrian} 253218065Sadrian 254218065Sadrian/* 255218065Sadrian * Setup xmit of a fragmented frame. Allocate a buffer 256218065Sadrian * for each frag and bump the node reference count to 257218065Sadrian * reflect the held reference to be setup by ath_tx_start. 258218065Sadrian */ 259218065Sadrianint 260218065Sadrianath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags, 261218065Sadrian struct mbuf *m0, struct ieee80211_node *ni) 262218065Sadrian{ 263218065Sadrian struct mbuf *m; 264218065Sadrian struct ath_buf *bf; 265218065Sadrian 266218065Sadrian ATH_TXBUF_LOCK(sc); 267218065Sadrian for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) { 268237000Sadrian /* XXX non-management? */ 269237000Sadrian bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL); 270218065Sadrian if (bf == NULL) { /* out of buffers, cleanup */ 271234009Sadrian device_printf(sc->sc_dev, "%s: no buffer?\n", 272234009Sadrian __func__); 273218065Sadrian ath_txfrag_cleanup(sc, frags, ni); 274218065Sadrian break; 275218065Sadrian } 276218065Sadrian ieee80211_node_incref(ni); 277227344Sadrian TAILQ_INSERT_TAIL(frags, bf, bf_list); 278218065Sadrian } 279218065Sadrian ATH_TXBUF_UNLOCK(sc); 280218065Sadrian 281227344Sadrian return !TAILQ_EMPTY(frags); 282218065Sadrian} 283218065Sadrian 284218065Sadrian/* 285218065Sadrian * Reclaim mbuf resources. For fragmented frames we 286218065Sadrian * need to claim each frag chained with m_nextpkt. 287218065Sadrian */ 288218065Sadrianvoid 289218065Sadrianath_freetx(struct mbuf *m) 290218065Sadrian{ 291218065Sadrian struct mbuf *next; 292218065Sadrian 293218065Sadrian do { 294218065Sadrian next = m->m_nextpkt; 295218065Sadrian m->m_nextpkt = NULL; 296218065Sadrian m_freem(m); 297218065Sadrian } while ((m = next) != NULL); 298218065Sadrian} 299218065Sadrian 300218065Sadrianstatic int 301218065Sadrianath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0) 302218065Sadrian{ 303218065Sadrian struct mbuf *m; 304218065Sadrian int error; 305218065Sadrian 306218065Sadrian /* 307218065Sadrian * Load the DMA map so any coalescing is done. This 308218065Sadrian * also calculates the number of descriptors we need. 309218065Sadrian */ 310218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 311218065Sadrian bf->bf_segs, &bf->bf_nseg, 312218065Sadrian BUS_DMA_NOWAIT); 313218065Sadrian if (error == EFBIG) { 314218065Sadrian /* XXX packet requires too many descriptors */ 315248985Sadrian bf->bf_nseg = ATH_MAX_SCATTER + 1; 316218065Sadrian } else if (error != 0) { 317218065Sadrian sc->sc_stats.ast_tx_busdma++; 318218065Sadrian ath_freetx(m0); 319218065Sadrian return error; 320218065Sadrian } 321218065Sadrian /* 322218065Sadrian * Discard null packets and check for packets that 323218065Sadrian * require too many TX descriptors. We try to convert 324218065Sadrian * the latter to a cluster. 325218065Sadrian */ 326248985Sadrian if (bf->bf_nseg > ATH_MAX_SCATTER) { /* too many desc's, linearize */ 327218065Sadrian sc->sc_stats.ast_tx_linear++; 328248985Sadrian m = m_collapse(m0, M_NOWAIT, ATH_MAX_SCATTER); 329218065Sadrian if (m == NULL) { 330218065Sadrian ath_freetx(m0); 331218065Sadrian sc->sc_stats.ast_tx_nombuf++; 332218065Sadrian return ENOMEM; 333218065Sadrian } 334218065Sadrian m0 = m; 335218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 336218065Sadrian bf->bf_segs, &bf->bf_nseg, 337218065Sadrian BUS_DMA_NOWAIT); 338218065Sadrian if (error != 0) { 339218065Sadrian sc->sc_stats.ast_tx_busdma++; 340218065Sadrian ath_freetx(m0); 341218065Sadrian return error; 342218065Sadrian } 343248985Sadrian KASSERT(bf->bf_nseg <= ATH_MAX_SCATTER, 344218065Sadrian ("too many segments after defrag; nseg %u", bf->bf_nseg)); 345218065Sadrian } else if (bf->bf_nseg == 0) { /* null packet, discard */ 346218065Sadrian sc->sc_stats.ast_tx_nodata++; 347218065Sadrian ath_freetx(m0); 348218065Sadrian return EIO; 349218065Sadrian } 350218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", 351218065Sadrian __func__, m0, m0->m_pkthdr.len); 352218065Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 353218065Sadrian bf->bf_m = m0; 354218065Sadrian 355218065Sadrian return 0; 356218065Sadrian} 357218065Sadrian 358227360Sadrian/* 359242656Sadrian * Chain together segments+descriptors for a frame - 11n or otherwise. 360242656Sadrian * 361242656Sadrian * For aggregates, this is called on each frame in the aggregate. 362227360Sadrian */ 363218065Sadrianstatic void 364242656Sadrianath_tx_chaindesclist(struct ath_softc *sc, struct ath_desc *ds0, 365242656Sadrian struct ath_buf *bf, int is_aggr, int is_first_subframe, 366242656Sadrian int is_last_subframe) 367218065Sadrian{ 368218065Sadrian struct ath_hal *ah = sc->sc_ah; 369242656Sadrian char *ds; 370239290Sadrian int i, bp, dsp; 371239051Sadrian HAL_DMA_ADDR bufAddrList[4]; 372239051Sadrian uint32_t segLenList[4]; 373239290Sadrian int numTxMaps = 1; 374239380Sadrian int isFirstDesc = 1; 375239051Sadrian 376238708Sadrian /* 377238708Sadrian * XXX There's txdma and txdma_mgmt; the descriptor 378238708Sadrian * sizes must match. 379238708Sadrian */ 380238708Sadrian struct ath_descdma *dd = &sc->sc_txdma; 381218065Sadrian 382218065Sadrian /* 383218065Sadrian * Fillin the remainder of the descriptor info. 384218065Sadrian */ 385239290Sadrian 386239290Sadrian /* 387248527Sadrian * We need the number of TX data pointers in each descriptor. 388248527Sadrian * EDMA and later chips support 4 TX buffers per descriptor; 389248527Sadrian * previous chips just support one. 390239290Sadrian */ 391248527Sadrian numTxMaps = sc->sc_tx_nmaps; 392239290Sadrian 393239290Sadrian /* 394239290Sadrian * For EDMA and later chips ensure the TX map is fully populated 395239290Sadrian * before advancing to the next descriptor. 396239290Sadrian */ 397242656Sadrian ds = (char *) bf->bf_desc; 398239290Sadrian bp = dsp = 0; 399239290Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 400239290Sadrian bzero(segLenList, sizeof(segLenList)); 401239290Sadrian for (i = 0; i < bf->bf_nseg; i++) { 402239290Sadrian bufAddrList[bp] = bf->bf_segs[i].ds_addr; 403239290Sadrian segLenList[bp] = bf->bf_segs[i].ds_len; 404239290Sadrian bp++; 405239051Sadrian 406239290Sadrian /* 407239290Sadrian * Go to the next segment if this isn't the last segment 408239290Sadrian * and there's space in the current TX map. 409239290Sadrian */ 410239290Sadrian if ((i != bf->bf_nseg - 1) && (bp < numTxMaps)) 411239290Sadrian continue; 412239051Sadrian 413239290Sadrian /* 414239290Sadrian * Last segment or we're out of buffer pointers. 415239290Sadrian */ 416239290Sadrian bp = 0; 417239290Sadrian 418218065Sadrian if (i == bf->bf_nseg - 1) 419239409Sadrian ath_hal_settxdesclink(ah, (struct ath_desc *) ds, 0); 420218065Sadrian else 421239409Sadrian ath_hal_settxdesclink(ah, (struct ath_desc *) ds, 422239290Sadrian bf->bf_daddr + dd->dd_descsize * (dsp + 1)); 423239051Sadrian 424239051Sadrian /* 425244109Sadrian * XXX This assumes that bfs_txq is the actual destination 426244109Sadrian * hardware queue at this point. It may not have been 427244109Sadrian * assigned, it may actually be pointing to the multicast 428244109Sadrian * software TXQ id. These must be fixed! 429239051Sadrian */ 430239409Sadrian ath_hal_filltxdesc(ah, (struct ath_desc *) ds 431239051Sadrian , bufAddrList 432239051Sadrian , segLenList 433239290Sadrian , bf->bf_descid /* XXX desc id */ 434244109Sadrian , bf->bf_state.bfs_tx_queue 435239380Sadrian , isFirstDesc /* first segment */ 436218065Sadrian , i == bf->bf_nseg - 1 /* last segment */ 437239409Sadrian , (struct ath_desc *) ds0 /* first descriptor */ 438218065Sadrian ); 439240255Sadrian 440242656Sadrian /* 441242656Sadrian * Make sure the 11n aggregate fields are cleared. 442242656Sadrian * 443242656Sadrian * XXX TODO: this doesn't need to be called for 444242656Sadrian * aggregate frames; as it'll be called on all 445242656Sadrian * sub-frames. Since the descriptors are in 446242656Sadrian * non-cacheable memory, this leads to some 447242656Sadrian * rather slow writes on MIPS/ARM platforms. 448242656Sadrian */ 449240255Sadrian if (ath_tx_is_11n(sc)) 450240333Sadrian ath_hal_clr11n_aggr(sc->sc_ah, (struct ath_desc *) ds); 451240255Sadrian 452242656Sadrian /* 453242656Sadrian * If 11n is enabled, set it up as if it's an aggregate 454242656Sadrian * frame. 455242656Sadrian */ 456242656Sadrian if (is_last_subframe) { 457242656Sadrian ath_hal_set11n_aggr_last(sc->sc_ah, 458242656Sadrian (struct ath_desc *) ds); 459242656Sadrian } else if (is_aggr) { 460242656Sadrian /* 461242656Sadrian * This clears the aggrlen field; so 462242656Sadrian * the caller needs to call set_aggr_first()! 463242656Sadrian * 464242656Sadrian * XXX TODO: don't call this for the first 465242656Sadrian * descriptor in the first frame in an 466242656Sadrian * aggregate! 467242656Sadrian */ 468242656Sadrian ath_hal_set11n_aggr_middle(sc->sc_ah, 469242656Sadrian (struct ath_desc *) ds, 470242656Sadrian bf->bf_state.bfs_ndelim); 471242656Sadrian } 472239380Sadrian isFirstDesc = 0; 473239409Sadrian bf->bf_lastds = (struct ath_desc *) ds; 474239290Sadrian 475239290Sadrian /* 476239290Sadrian * Don't forget to skip to the next descriptor. 477239290Sadrian */ 478239409Sadrian ds += sc->sc_tx_desclen; 479239290Sadrian dsp++; 480239290Sadrian 481239290Sadrian /* 482239290Sadrian * .. and don't forget to blank these out! 483239290Sadrian */ 484239290Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 485239290Sadrian bzero(segLenList, sizeof(segLenList)); 486218065Sadrian } 487233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 488218154Sadrian} 489218154Sadrian 490227364Sadrian/* 491238947Sadrian * Set the rate control fields in the given descriptor based on 492238947Sadrian * the bf_state fields and node state. 493238947Sadrian * 494238947Sadrian * The bfs fields should already be set with the relevant rate 495238947Sadrian * control information, including whether MRR is to be enabled. 496238947Sadrian * 497238947Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 498238947Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 499238947Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 500238947Sadrian * unconditionally for 11n chips. These require the 11n rate 501238947Sadrian * scenario to be set if MCS rates are enabled, so it's easier 502238947Sadrian * to just always call it. The caller can then only set rates 2, 3 503238947Sadrian * and 4 if multi-rate retry is needed. 504238947Sadrian */ 505238947Sadrianstatic void 506238947Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 507238947Sadrian struct ath_buf *bf) 508238947Sadrian{ 509238947Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 510238947Sadrian 511238947Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 512238947Sadrian if (! bf->bf_state.bfs_ismrr) 513238947Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 514238947Sadrian 515243647Sadrian#if 0 516238947Sadrian /* 517243647Sadrian * If NOACK is set, just set ntries=1. 518243647Sadrian */ 519243647Sadrian else if (bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) { 520243647Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 521243647Sadrian rc[0].tries = 1; 522243647Sadrian } 523243647Sadrian#endif 524243647Sadrian 525243647Sadrian /* 526238947Sadrian * Always call - that way a retried descriptor will 527238947Sadrian * have the MRR fields overwritten. 528238947Sadrian * 529238947Sadrian * XXX TODO: see if this is really needed - setting up 530238947Sadrian * the first descriptor should set the MRR fields to 0 531238947Sadrian * for us anyway. 532238947Sadrian */ 533238947Sadrian if (ath_tx_is_11n(sc)) { 534238947Sadrian ath_buf_set_rate(sc, ni, bf); 535238947Sadrian } else { 536238947Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 537238947Sadrian , rc[1].ratecode, rc[1].tries 538238947Sadrian , rc[2].ratecode, rc[2].tries 539238947Sadrian , rc[3].ratecode, rc[3].tries 540238947Sadrian ); 541238947Sadrian } 542238947Sadrian} 543238947Sadrian 544238947Sadrian/* 545227364Sadrian * Setup segments+descriptors for an 11n aggregate. 546227364Sadrian * bf_first is the first buffer in the aggregate. 547227364Sadrian * The descriptor list must already been linked together using 548227364Sadrian * bf->bf_next. 549227364Sadrian */ 550227364Sadrianstatic void 551227364Sadrianath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first) 552227364Sadrian{ 553227364Sadrian struct ath_buf *bf, *bf_prev = NULL; 554242656Sadrian struct ath_desc *ds0 = bf_first->bf_desc; 555227364Sadrian 556227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n", 557227364Sadrian __func__, bf_first->bf_state.bfs_nframes, 558227364Sadrian bf_first->bf_state.bfs_al); 559227364Sadrian 560242951Sadrian bf = bf_first; 561242951Sadrian 562242951Sadrian if (bf->bf_state.bfs_txrate0 == 0) 563242951Sadrian device_printf(sc->sc_dev, "%s: bf=%p, txrate0=%d\n", 564242951Sadrian __func__, bf, 0); 565242951Sadrian if (bf->bf_state.bfs_rc[0].ratecode == 0) 566242951Sadrian device_printf(sc->sc_dev, "%s: bf=%p, rix0=%d\n", 567242951Sadrian __func__, bf, 0); 568242951Sadrian 569227364Sadrian /* 570242656Sadrian * Setup all descriptors of all subframes - this will 571242656Sadrian * call ath_hal_set11naggrmiddle() on every frame. 572227364Sadrian */ 573227364Sadrian while (bf != NULL) { 574227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 575227364Sadrian "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n", 576227364Sadrian __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen, 577227364Sadrian SEQNO(bf->bf_state.bfs_seqno)); 578227364Sadrian 579242656Sadrian /* 580242656Sadrian * Setup the initial fields for the first descriptor - all 581242656Sadrian * the non-11n specific stuff. 582242656Sadrian */ 583242656Sadrian ath_hal_setuptxdesc(sc->sc_ah, bf->bf_desc 584242656Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 585242656Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 586242656Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 587242656Sadrian , bf->bf_state.bfs_txpower /* txpower */ 588242656Sadrian , bf->bf_state.bfs_txrate0 589242656Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 590242656Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 591242656Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 592242656Sadrian , bf->bf_state.bfs_txflags | HAL_TXDESC_INTREQ /* flags */ 593242656Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 594242656Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 595242656Sadrian ); 596227364Sadrian 597227364Sadrian /* 598242656Sadrian * First descriptor? Setup the rate control and initial 599242656Sadrian * aggregate header information. 600242656Sadrian */ 601242656Sadrian if (bf == bf_first) { 602242656Sadrian /* 603242656Sadrian * setup first desc with rate and aggr info 604242656Sadrian */ 605242656Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 606242656Sadrian } 607242656Sadrian 608242656Sadrian /* 609242656Sadrian * Setup the descriptors for a multi-descriptor frame. 610242656Sadrian * This is both aggregate and non-aggregate aware. 611242656Sadrian */ 612242656Sadrian ath_tx_chaindesclist(sc, ds0, bf, 613242656Sadrian 1, /* is_aggr */ 614242656Sadrian !! (bf == bf_first), /* is_first_subframe */ 615242656Sadrian !! (bf->bf_next == NULL) /* is_last_subframe */ 616242656Sadrian ); 617242656Sadrian 618242656Sadrian if (bf == bf_first) { 619242656Sadrian /* 620242656Sadrian * Initialise the first 11n aggregate with the 621242656Sadrian * aggregate length and aggregate enable bits. 622242656Sadrian */ 623242656Sadrian ath_hal_set11n_aggr_first(sc->sc_ah, 624242656Sadrian ds0, 625242656Sadrian bf->bf_state.bfs_al, 626242656Sadrian bf->bf_state.bfs_ndelim); 627242656Sadrian } 628242656Sadrian 629242656Sadrian /* 630227364Sadrian * Link the last descriptor of the previous frame 631227364Sadrian * to the beginning descriptor of this frame. 632227364Sadrian */ 633227364Sadrian if (bf_prev != NULL) 634238609Sadrian ath_hal_settxdesclink(sc->sc_ah, bf_prev->bf_lastds, 635238609Sadrian bf->bf_daddr); 636227364Sadrian 637227364Sadrian /* Save a copy so we can link the next descriptor in */ 638227364Sadrian bf_prev = bf; 639227364Sadrian bf = bf->bf_next; 640227364Sadrian } 641227364Sadrian 642227364Sadrian /* 643227364Sadrian * Set the first descriptor bf_lastds field to point to 644227364Sadrian * the last descriptor in the last subframe, that's where 645227364Sadrian * the status update will occur. 646227364Sadrian */ 647227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 648227364Sadrian 649227364Sadrian /* 650227364Sadrian * And bf_last in the first descriptor points to the end of 651227364Sadrian * the aggregate list. 652227364Sadrian */ 653227364Sadrian bf_first->bf_last = bf_prev; 654227364Sadrian 655243047Sadrian /* 656243047Sadrian * For non-AR9300 NICs, which require the rate control 657243047Sadrian * in the final descriptor - let's set that up now. 658243047Sadrian * 659243047Sadrian * This is because the filltxdesc() HAL call doesn't 660243047Sadrian * populate the last segment with rate control information 661243047Sadrian * if firstSeg is also true. For non-aggregate frames 662243047Sadrian * that is fine, as the first frame already has rate control 663243047Sadrian * info. But if the last frame in an aggregate has one 664243047Sadrian * descriptor, both firstseg and lastseg will be true and 665243047Sadrian * the rate info isn't copied. 666243047Sadrian * 667243047Sadrian * This is inefficient on MIPS/ARM platforms that have 668243047Sadrian * non-cachable memory for TX descriptors, but we'll just 669243047Sadrian * make do for now. 670243047Sadrian * 671243047Sadrian * As to why the rate table is stashed in the last descriptor 672243047Sadrian * rather than the first descriptor? Because proctxdesc() 673243047Sadrian * is called on the final descriptor in an MPDU or A-MPDU - 674243047Sadrian * ie, the one that gets updated by the hardware upon 675243047Sadrian * completion. That way proctxdesc() doesn't need to know 676243047Sadrian * about the first _and_ last TX descriptor. 677243047Sadrian */ 678243047Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_lastds, ds0); 679243047Sadrian 680227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 681227364Sadrian} 682227364Sadrian 683239051Sadrian/* 684239051Sadrian * Hand-off a frame to the multicast TX queue. 685239051Sadrian * 686239051Sadrian * This is a software TXQ which will be appended to the CAB queue 687239051Sadrian * during the beacon setup code. 688239051Sadrian * 689239051Sadrian * XXX TODO: since the AR9300 EDMA TX queue support wants the QCU ID 690244109Sadrian * as part of the TX descriptor, bf_state.bfs_tx_queue must be updated 691239051Sadrian * with the actual hardware txq, or all of this will fall apart. 692239051Sadrian * 693239051Sadrian * XXX It may not be a bad idea to just stuff the QCU ID into bf_state 694244109Sadrian * and retire bfs_tx_queue; then make sure the CABQ QCU ID is populated 695239051Sadrian * correctly. 696239051Sadrian */ 697227364Sadrianstatic void 698227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 699227364Sadrian struct ath_buf *bf) 700227364Sadrian{ 701243786Sadrian ATH_TX_LOCK_ASSERT(sc); 702243786Sadrian 703227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 704227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 705248676Sadrian 706248676Sadrian ATH_TXQ_LOCK(txq); 707248713Sadrian if (ATH_TXQ_LAST(txq, axq_q_s) != NULL) { 708248713Sadrian struct ath_buf *bf_last = ATH_TXQ_LAST(txq, axq_q_s); 709227364Sadrian struct ieee80211_frame *wh; 710227364Sadrian 711227364Sadrian /* mark previous frame */ 712248713Sadrian wh = mtod(bf_last->bf_m, struct ieee80211_frame *); 713227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 714248713Sadrian bus_dmamap_sync(sc->sc_dmat, bf_last->bf_dmamap, 715227364Sadrian BUS_DMASYNC_PREWRITE); 716227364Sadrian 717227364Sadrian /* link descriptor */ 718248713Sadrian ath_hal_settxdesclink(sc->sc_ah, 719248713Sadrian bf_last->bf_lastds, 720248713Sadrian bf->bf_daddr); 721227364Sadrian } 722227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 723248671Sadrian ATH_TXQ_UNLOCK(txq); 724227364Sadrian} 725227364Sadrian 726227364Sadrian/* 727227364Sadrian * Hand-off packet to a hardware queue. 728227364Sadrian */ 729227364Sadrianstatic void 730229949Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, 731229949Sadrian struct ath_buf *bf) 732227364Sadrian{ 733227364Sadrian struct ath_hal *ah = sc->sc_ah; 734227364Sadrian 735227364Sadrian /* 736218065Sadrian * Insert the frame on the outbound list and pass it on 737218065Sadrian * to the hardware. Multicast frames buffered for power 738218065Sadrian * save stations and transmit from the CAB queue are stored 739218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 740218065Sadrian * the SWBA handler since frames only go out on DTIM and 741218065Sadrian * to avoid possible races. 742218065Sadrian */ 743243786Sadrian ATH_TX_LOCK_ASSERT(sc); 744218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 745227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 746227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 747227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 748227364Sadrian 749227651Sadrian#if 0 750227651Sadrian /* 751227651Sadrian * This causes a LOR. Find out where the PCU lock is being 752227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 753227651Sadrian * be occuring. 754227651Sadrian */ 755227651Sadrian ATH_PCU_LOCK(sc); 756227651Sadrian if (sc->sc_inreset_cnt) { 757227651Sadrian ATH_PCU_UNLOCK(sc); 758227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 759227651Sadrian "%s: called with sc_in_reset != 0\n", 760227651Sadrian __func__); 761227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 762227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 763227651Sadrian __func__, txq->axq_qnum, 764227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 765227651Sadrian txq->axq_depth); 766227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 767227651Sadrian if (bf->bf_state.bfs_aggr) 768227651Sadrian txq->axq_aggr_depth++; 769227651Sadrian /* 770227651Sadrian * There's no need to update axq_link; the hardware 771227651Sadrian * is in reset and once the reset is complete, any 772227651Sadrian * non-empty queues will simply have DMA restarted. 773227651Sadrian */ 774227651Sadrian return; 775227651Sadrian } 776227651Sadrian ATH_PCU_UNLOCK(sc); 777227651Sadrian#endif 778227651Sadrian 779227364Sadrian /* For now, so not to generate whitespace diffs */ 780227364Sadrian if (1) { 781248671Sadrian ATH_TXQ_LOCK(txq); 782218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 783218065Sadrian int qbusy; 784218065Sadrian 785218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 786218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 787240899Sadrian 788240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 4, 789240899Sadrian "ath_tx_handoff: txq=%u, add bf=%p, qbusy=%d, depth=%d", 790240899Sadrian txq->axq_qnum, bf, qbusy, txq->axq_depth); 791218065Sadrian if (txq->axq_link == NULL) { 792218065Sadrian /* 793218065Sadrian * Be careful writing the address to TXDP. If 794218065Sadrian * the tx q is enabled then this write will be 795218065Sadrian * ignored. Normally this is not an issue but 796218065Sadrian * when tdma is in use and the q is beacon gated 797218065Sadrian * this race can occur. If the q is busy then 798218065Sadrian * defer the work to later--either when another 799218065Sadrian * packet comes along or when we prepare a beacon 800218065Sadrian * frame at SWBA. 801218065Sadrian */ 802218065Sadrian if (!qbusy) { 803229949Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 804229949Sadrian bf->bf_daddr); 805218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 806218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 807240899Sadrian "%s: TXDP[%u] = %p (%p) lastds=%p depth %d\n", 808218065Sadrian __func__, txq->axq_qnum, 809218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 810240899Sadrian bf->bf_lastds, 811218065Sadrian txq->axq_depth); 812240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 5, 813240899Sadrian "ath_tx_handoff: TXDP[%u] = %p (%p) " 814240899Sadrian "lastds=%p depth %d", 815240899Sadrian txq->axq_qnum, 816240899Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 817240899Sadrian bf->bf_lastds, 818240899Sadrian txq->axq_depth); 819218065Sadrian } else { 820218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 821218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 822218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 823218065Sadrian txq->axq_qnum); 824240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 0, "defer enable"); 825218065Sadrian } 826218065Sadrian } else { 827218065Sadrian *txq->axq_link = bf->bf_daddr; 828218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 829218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 830218065Sadrian txq->axq_qnum, txq->axq_link, 831229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 832229949Sadrian txq->axq_depth); 833240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 5, 834240899Sadrian "ath_tx_handoff: link[%u](%p)=%p (%p) lastds=%p", 835240899Sadrian txq->axq_qnum, txq->axq_link, 836240899Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 837240899Sadrian bf->bf_lastds); 838240899Sadrian 839218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 840218065Sadrian /* 841218065Sadrian * The q was busy when we previously tried 842218065Sadrian * to write the address of the first buffer 843218065Sadrian * in the chain. Since it's not busy now 844218065Sadrian * handle this chore. We are certain the 845218065Sadrian * buffer at the front is the right one since 846218065Sadrian * axq_link is NULL only when the buffer list 847218065Sadrian * is/was empty. 848218065Sadrian */ 849218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 850227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 851218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 852218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 853218065Sadrian "%s: Q%u restarted\n", __func__, 854218065Sadrian txq->axq_qnum); 855240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 4, 856240899Sadrian "ath_tx_handoff: txq[%d] restarted, bf=%p " 857240899Sadrian "daddr=%p ds=%p", 858240899Sadrian txq->axq_qnum, 859240899Sadrian bf, 860240899Sadrian (caddr_t)bf->bf_daddr, 861240899Sadrian bf->bf_desc); 862218065Sadrian } 863218065Sadrian } 864218065Sadrian#else 865218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 866241500Sadrian ATH_KTR(sc, ATH_KTR_TX, 3, 867241500Sadrian "ath_tx_handoff: non-tdma: txq=%u, add bf=%p " 868240899Sadrian "depth=%d", 869240899Sadrian txq->axq_qnum, 870240899Sadrian bf, 871240899Sadrian txq->axq_depth); 872218065Sadrian if (txq->axq_link == NULL) { 873218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 874218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 875218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 876218065Sadrian __func__, txq->axq_qnum, 877218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 878218065Sadrian txq->axq_depth); 879240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 5, 880240899Sadrian "ath_tx_handoff: non-tdma: TXDP[%u] = %p (%p) " 881240899Sadrian "lastds=%p depth %d", 882240899Sadrian txq->axq_qnum, 883240899Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 884240899Sadrian bf->bf_lastds, 885240899Sadrian txq->axq_depth); 886240899Sadrian 887218065Sadrian } else { 888218065Sadrian *txq->axq_link = bf->bf_daddr; 889218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 890218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 891218065Sadrian txq->axq_qnum, txq->axq_link, 892229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 893229949Sadrian txq->axq_depth); 894240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 5, 895240899Sadrian "ath_tx_handoff: non-tdma: link[%u](%p)=%p (%p) " 896240899Sadrian "lastds=%d", 897240899Sadrian txq->axq_qnum, txq->axq_link, 898240899Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 899240899Sadrian bf->bf_lastds); 900240899Sadrian 901218065Sadrian } 902218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 903227360Sadrian if (bf->bf_state.bfs_aggr) 904227360Sadrian txq->axq_aggr_depth++; 905238609Sadrian ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link); 906218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 907248671Sadrian ATH_TXQ_UNLOCK(txq); 908240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 1, 909240899Sadrian "ath_tx_handoff: txq=%u, txstart", txq->axq_qnum); 910227364Sadrian } 911227364Sadrian} 912218065Sadrian 913227364Sadrian/* 914227364Sadrian * Restart TX DMA for the given TXQ. 915227364Sadrian * 916227364Sadrian * This must be called whether the queue is empty or not. 917227364Sadrian */ 918238930Sadrianstatic void 919238930Sadrianath_legacy_tx_dma_restart(struct ath_softc *sc, struct ath_txq *txq) 920227364Sadrian{ 921227364Sadrian struct ath_hal *ah = sc->sc_ah; 922232707Sadrian struct ath_buf *bf, *bf_last; 923218065Sadrian 924248671Sadrian ATH_TXQ_LOCK_ASSERT(txq); 925227364Sadrian /* This is always going to be cleared, empty or not */ 926227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 927227364Sadrian 928232707Sadrian /* XXX make this ATH_TXQ_FIRST */ 929227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 930232707Sadrian bf_last = ATH_TXQ_LAST(txq, axq_q_s); 931232707Sadrian 932227364Sadrian if (bf == NULL) 933227364Sadrian return; 934227364Sadrian 935227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 936239120Sadrian ath_hal_gettxdesclinkptr(ah, bf_last->bf_lastds, &txq->axq_link); 937227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 938218065Sadrian} 939218065Sadrian 940227364Sadrian/* 941227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 942227364Sadrian * 943227364Sadrian * The relevant hardware txq should be locked. 944227364Sadrian */ 945227364Sadrianstatic void 946238930Sadrianath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq, 947238930Sadrian struct ath_buf *bf) 948227364Sadrian{ 949243786Sadrian ATH_TX_LOCK_ASSERT(sc); 950227364Sadrian 951243162Sadrian#ifdef ATH_DEBUG_ALQ 952243162Sadrian if (if_ath_alq_checkdebug(&sc->sc_alq, ATH_ALQ_EDMA_TXDESC)) 953243162Sadrian ath_tx_alq_post(sc, bf); 954243162Sadrian#endif 955243162Sadrian 956227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 957227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 958227364Sadrian else 959227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 960227364Sadrian} 961227364Sadrian 962218154Sadrianstatic int 963218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 964229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 965229949Sadrian int *keyix) 966218154Sadrian{ 967233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 968233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 969233330Sadrian __func__, 970233330Sadrian *hdrlen, 971233330Sadrian *pktlen, 972233330Sadrian isfrag, 973233330Sadrian iswep, 974233330Sadrian m0); 975233330Sadrian 976218154Sadrian if (iswep) { 977218154Sadrian const struct ieee80211_cipher *cip; 978218154Sadrian struct ieee80211_key *k; 979218154Sadrian 980218154Sadrian /* 981218154Sadrian * Construct the 802.11 header+trailer for an encrypted 982218154Sadrian * frame. The only reason this can fail is because of an 983218154Sadrian * unknown or unsupported cipher/key type. 984218154Sadrian */ 985218154Sadrian k = ieee80211_crypto_encap(ni, m0); 986218154Sadrian if (k == NULL) { 987218154Sadrian /* 988218154Sadrian * This can happen when the key is yanked after the 989218154Sadrian * frame was queued. Just discard the frame; the 990218154Sadrian * 802.11 layer counts failures and provides 991218154Sadrian * debugging/diagnostics. 992218154Sadrian */ 993229949Sadrian return (0); 994218154Sadrian } 995218154Sadrian /* 996218154Sadrian * Adjust the packet + header lengths for the crypto 997218154Sadrian * additions and calculate the h/w key index. When 998218154Sadrian * a s/w mic is done the frame will have had any mic 999218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 1000218154Sadrian * account for it. Otherwise we need to add it to the 1001218154Sadrian * packet length. 1002218154Sadrian */ 1003218154Sadrian cip = k->wk_cipher; 1004218154Sadrian (*hdrlen) += cip->ic_header; 1005218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 1006218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 1007218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 1008218154Sadrian (*pktlen) += cip->ic_miclen; 1009218154Sadrian (*keyix) = k->wk_keyix; 1010218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 1011218154Sadrian /* 1012218154Sadrian * Use station key cache slot, if assigned. 1013218154Sadrian */ 1014218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 1015218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 1016218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 1017218154Sadrian } else 1018218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 1019218154Sadrian 1020229949Sadrian return (1); 1021218154Sadrian} 1022218154Sadrian 1023233989Sadrian/* 1024233989Sadrian * Calculate whether interoperability protection is required for 1025233989Sadrian * this frame. 1026233989Sadrian * 1027233989Sadrian * This requires the rate control information be filled in, 1028233989Sadrian * as the protection requirement depends upon the current 1029233989Sadrian * operating mode / PHY. 1030233989Sadrian */ 1031233989Sadrianstatic void 1032233989Sadrianath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf) 1033233989Sadrian{ 1034233989Sadrian struct ieee80211_frame *wh; 1035233989Sadrian uint8_t rix; 1036233989Sadrian uint16_t flags; 1037233989Sadrian int shortPreamble; 1038233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 1039233989Sadrian struct ifnet *ifp = sc->sc_ifp; 1040233989Sadrian struct ieee80211com *ic = ifp->if_l2com; 1041233989Sadrian 1042233989Sadrian flags = bf->bf_state.bfs_txflags; 1043233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 1044233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 1045233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 1046233989Sadrian 1047233989Sadrian /* 1048233989Sadrian * If 802.11g protection is enabled, determine whether 1049233989Sadrian * to use RTS/CTS or just CTS. Note that this is only 1050233989Sadrian * done for OFDM unicast frames. 1051233989Sadrian */ 1052233989Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 1053233989Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 1054233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1055233989Sadrian bf->bf_state.bfs_doprot = 1; 1056233989Sadrian /* XXX fragments must use CCK rates w/ protection */ 1057233989Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 1058233989Sadrian flags |= HAL_TXDESC_RTSENA; 1059233989Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 1060233989Sadrian flags |= HAL_TXDESC_CTSENA; 1061233989Sadrian } 1062233989Sadrian /* 1063233989Sadrian * For frags it would be desirable to use the 1064233989Sadrian * highest CCK rate for RTS/CTS. But stations 1065233989Sadrian * farther away may detect it at a lower CCK rate 1066233989Sadrian * so use the configured protection rate instead 1067233989Sadrian * (for now). 1068233989Sadrian */ 1069233989Sadrian sc->sc_stats.ast_tx_protect++; 1070233989Sadrian } 1071233989Sadrian 1072233989Sadrian /* 1073233989Sadrian * If 11n protection is enabled and it's a HT frame, 1074233989Sadrian * enable RTS. 1075233989Sadrian * 1076233989Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 1077233989Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 1078233989Sadrian * XXX indicates it's not a HT pure environment? 1079233989Sadrian */ 1080233989Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 1081233989Sadrian rt->info[rix].phy == IEEE80211_T_HT && 1082233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1083233989Sadrian flags |= HAL_TXDESC_RTSENA; 1084233989Sadrian sc->sc_stats.ast_tx_htprotect++; 1085233989Sadrian } 1086233989Sadrian bf->bf_state.bfs_txflags = flags; 1087233989Sadrian} 1088233989Sadrian 1089233989Sadrian/* 1090233989Sadrian * Update the frame duration given the currently selected rate. 1091233989Sadrian * 1092233989Sadrian * This also updates the frame duration value, so it will require 1093233989Sadrian * a DMA flush. 1094233989Sadrian */ 1095233989Sadrianstatic void 1096233989Sadrianath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf) 1097233989Sadrian{ 1098233989Sadrian struct ieee80211_frame *wh; 1099233989Sadrian uint8_t rix; 1100233989Sadrian uint16_t flags; 1101233989Sadrian int shortPreamble; 1102233989Sadrian struct ath_hal *ah = sc->sc_ah; 1103233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 1104233989Sadrian int isfrag = bf->bf_m->m_flags & M_FRAG; 1105233989Sadrian 1106233989Sadrian flags = bf->bf_state.bfs_txflags; 1107233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 1108233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 1109233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 1110233989Sadrian 1111233989Sadrian /* 1112233989Sadrian * Calculate duration. This logically belongs in the 802.11 1113233989Sadrian * layer but it lacks sufficient information to calculate it. 1114233989Sadrian */ 1115233989Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 1116233989Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 1117233989Sadrian u_int16_t dur; 1118233989Sadrian if (shortPreamble) 1119233989Sadrian dur = rt->info[rix].spAckDuration; 1120233989Sadrian else 1121233989Sadrian dur = rt->info[rix].lpAckDuration; 1122233989Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 1123233989Sadrian dur += dur; /* additional SIFS+ACK */ 1124246745Sadrian KASSERT(bf->bf_m->m_nextpkt != NULL, ("no fragment")); 1125233989Sadrian /* 1126233989Sadrian * Include the size of next fragment so NAV is 1127233989Sadrian * updated properly. The last fragment uses only 1128233989Sadrian * the ACK duration 1129242144Sadrian * 1130242144Sadrian * XXX TODO: ensure that the rate lookup for each 1131242144Sadrian * fragment is the same as the rate used by the 1132242144Sadrian * first fragment! 1133233989Sadrian */ 1134233989Sadrian dur += ath_hal_computetxtime(ah, rt, 1135246745Sadrian bf->bf_m->m_nextpkt->m_pkthdr.len, 1136233989Sadrian rix, shortPreamble); 1137233989Sadrian } 1138233989Sadrian if (isfrag) { 1139233989Sadrian /* 1140233989Sadrian * Force hardware to use computed duration for next 1141233989Sadrian * fragment by disabling multi-rate retry which updates 1142233989Sadrian * duration based on the multi-rate duration table. 1143233989Sadrian */ 1144233989Sadrian bf->bf_state.bfs_ismrr = 0; 1145233989Sadrian bf->bf_state.bfs_try0 = ATH_TXMGTTRY; 1146233989Sadrian /* XXX update bfs_rc[0].try? */ 1147233989Sadrian } 1148233989Sadrian 1149233989Sadrian /* Update the duration field itself */ 1150233989Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 1151233989Sadrian } 1152233989Sadrian} 1153233989Sadrian 1154218932Sadrianstatic uint8_t 1155218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 1156227364Sadrian int cix, int shortPreamble) 1157218157Sadrian{ 1158218932Sadrian uint8_t ctsrate; 1159218932Sadrian 1160218157Sadrian /* 1161218157Sadrian * CTS transmit rate is derived from the transmit rate 1162218157Sadrian * by looking in the h/w rate table. We must also factor 1163218157Sadrian * in whether or not a short preamble is to be used. 1164218157Sadrian */ 1165218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 1166218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 1167218932Sadrian ctsrate = rt->info[cix].rateCode; 1168218932Sadrian 1169218932Sadrian /* XXX this should only matter for legacy rates */ 1170218932Sadrian if (shortPreamble) 1171218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 1172218932Sadrian 1173229949Sadrian return (ctsrate); 1174218932Sadrian} 1175218932Sadrian 1176218932Sadrian/* 1177218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 1178218932Sadrian */ 1179218932Sadrianstatic int 1180218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 1181218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 1182218932Sadrian int flags) 1183218932Sadrian{ 1184218932Sadrian int ctsduration = 0; 1185218932Sadrian 1186218932Sadrian /* This mustn't be called for HT modes */ 1187218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 1188218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 1189218932Sadrian __func__, rt->info[cix].rateCode); 1190229949Sadrian return (-1); 1191218932Sadrian } 1192218932Sadrian 1193218157Sadrian /* 1194218157Sadrian * Compute the transmit duration based on the frame 1195218157Sadrian * size and the size of an ACK frame. We call into the 1196218157Sadrian * HAL to do the computation since it depends on the 1197218157Sadrian * characteristics of the actual PHY being used. 1198218157Sadrian * 1199218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 1200218157Sadrian * use the precalculated ACK durations. 1201218157Sadrian */ 1202218157Sadrian if (shortPreamble) { 1203218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1204218932Sadrian ctsduration += rt->info[cix].spAckDuration; 1205218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1206218157Sadrian rt, pktlen, rix, AH_TRUE); 1207218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1208218932Sadrian ctsduration += rt->info[rix].spAckDuration; 1209218157Sadrian } else { 1210218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1211218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 1212218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1213218157Sadrian rt, pktlen, rix, AH_FALSE); 1214218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1215218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 1216218157Sadrian } 1217218932Sadrian 1218229949Sadrian return (ctsduration); 1219218157Sadrian} 1220218157Sadrian 1221227364Sadrian/* 1222227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 1223227364Sadrian * values. 1224227364Sadrian * 1225227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 1226227364Sadrian * and cts duration must be re-calculated. 1227227364Sadrian * 1228227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 1229227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 1230227364Sadrian * 1231227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 1232227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 1233227364Sadrian */ 1234227364Sadrianstatic void 1235227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 1236218065Sadrian{ 1237227364Sadrian uint16_t ctsduration = 0; 1238227364Sadrian uint8_t ctsrate = 0; 1239227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 1240227364Sadrian uint8_t cix = 0; 1241227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 1242227364Sadrian 1243227364Sadrian /* 1244227364Sadrian * No RTS/CTS enabled? Don't bother. 1245227364Sadrian */ 1246233966Sadrian if ((bf->bf_state.bfs_txflags & 1247227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 1248227364Sadrian /* XXX is this really needed? */ 1249227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1250227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1251227364Sadrian return; 1252227364Sadrian } 1253227364Sadrian 1254227364Sadrian /* 1255227364Sadrian * If protection is enabled, use the protection rix control 1256227364Sadrian * rate. Otherwise use the rate0 control rate. 1257227364Sadrian */ 1258227364Sadrian if (bf->bf_state.bfs_doprot) 1259227364Sadrian rix = sc->sc_protrix; 1260227364Sadrian else 1261227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 1262227364Sadrian 1263227364Sadrian /* 1264227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 1265227364Sadrian * use it. 1266227364Sadrian */ 1267227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 1268227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 1269227364Sadrian else 1270227364Sadrian /* Control rate from above */ 1271227364Sadrian cix = rt->info[rix].controlRate; 1272227364Sadrian 1273227364Sadrian /* Calculate the rtscts rate for the given cix */ 1274227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 1275227364Sadrian bf->bf_state.bfs_shpream); 1276227364Sadrian 1277227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 1278227364Sadrian if (! ath_tx_is_11n(sc)) 1279227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 1280227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 1281233966Sadrian rt, bf->bf_state.bfs_txflags); 1282227364Sadrian 1283227364Sadrian /* Squirrel away in ath_buf */ 1284227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 1285227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 1286227364Sadrian 1287227364Sadrian /* 1288227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 1289227364Sadrian */ 1290238961Sadrian if (!sc->sc_mrrprot) { 1291238961Sadrian bf->bf_state.bfs_ismrr = 0; 1292238961Sadrian bf->bf_state.bfs_try0 = 1293238961Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 1294238961Sadrian } 1295227364Sadrian} 1296227364Sadrian 1297227364Sadrian/* 1298227364Sadrian * Setup the descriptor chain for a normal or fast-frame 1299227364Sadrian * frame. 1300239051Sadrian * 1301239051Sadrian * XXX TODO: extend to include the destination hardware QCU ID. 1302239051Sadrian * Make sure that is correct. Make sure that when being added 1303239051Sadrian * to the mcastq, the CABQ QCUID is set or things will get a bit 1304239051Sadrian * odd. 1305227364Sadrian */ 1306227364Sadrianstatic void 1307227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 1308227364Sadrian{ 1309227364Sadrian struct ath_desc *ds = bf->bf_desc; 1310227364Sadrian struct ath_hal *ah = sc->sc_ah; 1311227364Sadrian 1312242951Sadrian if (bf->bf_state.bfs_txrate0 == 0) 1313242951Sadrian device_printf(sc->sc_dev, "%s: bf=%p, txrate0=%d\n", 1314242951Sadrian __func__, bf, 0); 1315242951Sadrian 1316227364Sadrian ath_hal_setuptxdesc(ah, ds 1317227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 1318227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 1319227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 1320227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 1321227364Sadrian , bf->bf_state.bfs_txrate0 1322227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 1323227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 1324227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 1325233966Sadrian , bf->bf_state.bfs_txflags /* flags */ 1326227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 1327227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 1328227364Sadrian ); 1329227364Sadrian 1330227364Sadrian /* 1331227364Sadrian * This will be overriden when the descriptor chain is written. 1332227364Sadrian */ 1333227364Sadrian bf->bf_lastds = ds; 1334227364Sadrian bf->bf_last = bf; 1335227364Sadrian 1336238947Sadrian /* Set rate control and descriptor chain for this frame */ 1337238947Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1338242656Sadrian ath_tx_chaindesclist(sc, ds, bf, 0, 0, 0); 1339227364Sadrian} 1340227364Sadrian 1341227364Sadrian/* 1342227364Sadrian * Do a rate lookup. 1343227364Sadrian * 1344227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 1345227364Sadrian * Non-data frames and raw frames don't require it. 1346227364Sadrian * 1347227364Sadrian * This populates the primary and MRR entries; MRR values are 1348227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 1349227364Sadrian * pre-11n chipsets. 1350227364Sadrian * 1351227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 1352227364Sadrian * as they may depend upon the rate chosen. 1353227364Sadrian */ 1354227364Sadrianstatic void 1355227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 1356227364Sadrian{ 1357227364Sadrian uint8_t rate, rix; 1358227364Sadrian int try0; 1359227364Sadrian 1360227364Sadrian if (! bf->bf_state.bfs_doratelookup) 1361227364Sadrian return; 1362227364Sadrian 1363227364Sadrian /* Get rid of any previous state */ 1364227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1365227364Sadrian 1366227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 1367227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 1368227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 1369227364Sadrian 1370227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 1371227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1372227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 1373227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1374227364Sadrian 1375227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 1376227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 1377227364Sadrian bf->bf_state.bfs_rc); 1378227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 1379227364Sadrian 1380227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 1381227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 1382227364Sadrian bf->bf_state.bfs_try0 = try0; 1383227364Sadrian bf->bf_state.bfs_txrate0 = rate; 1384227364Sadrian} 1385227364Sadrian 1386227364Sadrian/* 1387240883Sadrian * Update the CLRDMASK bit in the ath_buf if it needs to be set. 1388240883Sadrian */ 1389240883Sadrianstatic void 1390240883Sadrianath_tx_update_clrdmask(struct ath_softc *sc, struct ath_tid *tid, 1391240883Sadrian struct ath_buf *bf) 1392240883Sadrian{ 1393245708Sadrian struct ath_node *an = ATH_NODE(bf->bf_node); 1394240883Sadrian 1395243786Sadrian ATH_TX_LOCK_ASSERT(sc); 1396240883Sadrian 1397245708Sadrian if (an->clrdmask == 1) { 1398240883Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 1399245708Sadrian an->clrdmask = 0; 1400240883Sadrian } 1401240883Sadrian} 1402240883Sadrian 1403240883Sadrian/* 1404227364Sadrian * Transmit the given frame to the hardware. 1405227364Sadrian * 1406227364Sadrian * The frame must already be setup; rate control must already have 1407227364Sadrian * been done. 1408227364Sadrian * 1409227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 1410227364Sadrian * it for this long when not doing software aggregation), later on 1411227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 1412227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 1413227364Sadrian */ 1414227364Sadrianstatic void 1415227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 1416227364Sadrian struct ath_buf *bf) 1417227364Sadrian{ 1418240883Sadrian struct ath_node *an = ATH_NODE(bf->bf_node); 1419240883Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 1420227364Sadrian 1421243786Sadrian ATH_TX_LOCK_ASSERT(sc); 1422227364Sadrian 1423240883Sadrian /* 1424240883Sadrian * For now, just enable CLRDMASK. ath_tx_xmit_normal() does 1425240883Sadrian * set a completion handler however it doesn't (yet) properly 1426240883Sadrian * handle the strict ordering requirements needed for normal, 1427240883Sadrian * non-aggregate session frames. 1428240883Sadrian * 1429240883Sadrian * Once this is implemented, only set CLRDMASK like this for 1430240883Sadrian * frames that must go out - eg management/raw frames. 1431240883Sadrian */ 1432240883Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 1433240883Sadrian 1434227364Sadrian /* Setup the descriptor before handoff */ 1435227364Sadrian ath_tx_do_ratelookup(sc, bf); 1436233989Sadrian ath_tx_calc_duration(sc, bf); 1437233989Sadrian ath_tx_calc_protection(sc, bf); 1438233989Sadrian ath_tx_set_rtscts(sc, bf); 1439227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1440227364Sadrian ath_tx_setds(sc, bf); 1441227364Sadrian 1442240883Sadrian /* Track per-TID hardware queue depth correctly */ 1443240883Sadrian tid->hwq_depth++; 1444240724Sadrian 1445240883Sadrian /* Assign the completion handler */ 1446240883Sadrian bf->bf_comp = ath_tx_normal_comp; 1447240883Sadrian 1448227364Sadrian /* Hand off to hardware */ 1449227364Sadrian ath_tx_handoff(sc, txq, bf); 1450227364Sadrian} 1451227364Sadrian 1452240722Sadrian/* 1453240722Sadrian * Do the basic frame setup stuff that's required before the frame 1454240722Sadrian * is added to a software queue. 1455240722Sadrian * 1456240722Sadrian * All frames get mostly the same treatment and it's done once. 1457240722Sadrian * Retransmits fiddle with things like the rate control setup, 1458240722Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 1459240722Sadrian * syncing and relinking it (back) into the hardware TX queue. 1460240722Sadrian * 1461240722Sadrian * Note that this may cause the mbuf to be reallocated, so 1462240722Sadrian * m0 may not be valid. 1463240722Sadrian */ 1464227364Sadrianstatic int 1465227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1466234009Sadrian struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq) 1467227364Sadrian{ 1468218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1469218065Sadrian struct ath_hal *ah = sc->sc_ah; 1470218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1471218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1472218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1473218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1474227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1475227364Sadrian u_int8_t rix = 0, txrate = 0; 1476218065Sadrian struct ath_desc *ds; 1477218065Sadrian struct ieee80211_frame *wh; 1478227364Sadrian u_int subtype, flags; 1479218065Sadrian HAL_PKT_TYPE atype; 1480218065Sadrian const HAL_RATE_TABLE *rt; 1481218065Sadrian HAL_BOOL shortPreamble; 1482218065Sadrian struct ath_node *an; 1483218065Sadrian u_int pri; 1484218065Sadrian 1485236880Sadrian /* 1486236880Sadrian * To ensure that both sequence numbers and the CCMP PN handling 1487236880Sadrian * is "correct", make sure that the relevant TID queue is locked. 1488236880Sadrian * Otherwise the CCMP PN and seqno may appear out of order, causing 1489236880Sadrian * re-ordered frames to have out of order CCMP PN's, resulting 1490236880Sadrian * in many, many frame drops. 1491236880Sadrian */ 1492243786Sadrian ATH_TX_LOCK_ASSERT(sc); 1493236880Sadrian 1494218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1495218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1496218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1497218065Sadrian isfrag = m0->m_flags & M_FRAG; 1498218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1499218065Sadrian /* 1500218065Sadrian * Packet length must not include any 1501218065Sadrian * pad bytes; deduct them here. 1502218065Sadrian */ 1503218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1504218065Sadrian 1505218154Sadrian /* Handle encryption twiddling if needed */ 1506227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1507227364Sadrian &pktlen, &keyix)) { 1508218154Sadrian ath_freetx(m0); 1509218154Sadrian return EIO; 1510218154Sadrian } 1511218065Sadrian 1512218154Sadrian /* packet header may have moved, reset our local pointer */ 1513218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1514218065Sadrian 1515218065Sadrian pktlen += IEEE80211_CRC_LEN; 1516218065Sadrian 1517218065Sadrian /* 1518218065Sadrian * Load the DMA map so any coalescing is done. This 1519218065Sadrian * also calculates the number of descriptors we need. 1520218065Sadrian */ 1521218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1522218065Sadrian if (error != 0) 1523218065Sadrian return error; 1524218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1525218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1526218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1527218065Sadrian 1528218065Sadrian /* setup descriptors */ 1529218065Sadrian ds = bf->bf_desc; 1530218065Sadrian rt = sc->sc_currates; 1531218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1532218065Sadrian 1533218065Sadrian /* 1534218065Sadrian * NB: the 802.11 layer marks whether or not we should 1535218065Sadrian * use short preamble based on the current mode and 1536218065Sadrian * negotiated parameters. 1537218065Sadrian */ 1538218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1539218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1540218065Sadrian shortPreamble = AH_TRUE; 1541218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1542218065Sadrian } else { 1543218065Sadrian shortPreamble = AH_FALSE; 1544218065Sadrian } 1545218065Sadrian 1546218065Sadrian an = ATH_NODE(ni); 1547240724Sadrian //flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1548240724Sadrian flags = 0; 1549218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1550218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1551218065Sadrian /* XXX use txparams instead of fixed values */ 1552218065Sadrian /* 1553218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1554218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1555218065Sadrian */ 1556218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1557218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1558218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1559218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1560218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1561218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1562218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1563218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1564218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1565218065Sadrian else 1566218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1567218065Sadrian rix = an->an_mgmtrix; 1568218065Sadrian txrate = rt->info[rix].rateCode; 1569218065Sadrian if (shortPreamble) 1570218065Sadrian txrate |= rt->info[rix].shortPreamble; 1571218065Sadrian try0 = ATH_TXMGTTRY; 1572218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1573218065Sadrian break; 1574218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1575218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1576218065Sadrian rix = an->an_mgmtrix; 1577218065Sadrian txrate = rt->info[rix].rateCode; 1578218065Sadrian if (shortPreamble) 1579218065Sadrian txrate |= rt->info[rix].shortPreamble; 1580218065Sadrian try0 = ATH_TXMGTTRY; 1581218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1582218065Sadrian break; 1583218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1584218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1585218065Sadrian /* 1586218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1587218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1588218065Sadrian * the rate control module for the rate to use. 1589218065Sadrian */ 1590218065Sadrian if (ismcast) { 1591218065Sadrian rix = an->an_mcastrix; 1592218065Sadrian txrate = rt->info[rix].rateCode; 1593218065Sadrian if (shortPreamble) 1594218065Sadrian txrate |= rt->info[rix].shortPreamble; 1595218065Sadrian try0 = 1; 1596218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1597218065Sadrian /* XXX? maybe always use long preamble? */ 1598218065Sadrian rix = an->an_mgmtrix; 1599218065Sadrian txrate = rt->info[rix].rateCode; 1600218065Sadrian if (shortPreamble) 1601218065Sadrian txrate |= rt->info[rix].shortPreamble; 1602218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1603218065Sadrian } else { 1604227364Sadrian /* 1605227364Sadrian * Do rate lookup on each TX, rather than using 1606227364Sadrian * the hard-coded TX information decided here. 1607227364Sadrian */ 1608227364Sadrian ismrr = 1; 1609227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1610218065Sadrian } 1611218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1612218065Sadrian flags |= HAL_TXDESC_NOACK; 1613218065Sadrian break; 1614218065Sadrian default: 1615218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1616218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1617218065Sadrian /* XXX statistic */ 1618218065Sadrian ath_freetx(m0); 1619218065Sadrian return EIO; 1620218065Sadrian } 1621218065Sadrian 1622237041Sadrian /* 1623237041Sadrian * There are two known scenarios where the frame AC doesn't match 1624237041Sadrian * what the destination TXQ is. 1625237041Sadrian * 1626237041Sadrian * + non-QoS frames (eg management?) that the net80211 stack has 1627237041Sadrian * assigned a higher AC to, but since it's a non-QoS TID, it's 1628237041Sadrian * being thrown into TID 16. TID 16 gets the AC_BE queue. 1629237041Sadrian * It's quite possible that management frames should just be 1630237041Sadrian * direct dispatched to hardware rather than go via the software 1631237041Sadrian * queue; that should be investigated in the future. There are 1632237041Sadrian * some specific scenarios where this doesn't make sense, mostly 1633237041Sadrian * surrounding ADDBA request/response - hence why that is special 1634237041Sadrian * cased. 1635237041Sadrian * 1636237041Sadrian * + Multicast frames going into the VAP mcast queue. That shows up 1637237041Sadrian * as "TXQ 11". 1638237041Sadrian * 1639237041Sadrian * This driver should eventually support separate TID and TXQ locking, 1640237041Sadrian * allowing for arbitrary AC frames to appear on arbitrary software 1641237041Sadrian * queues, being queued to the "correct" hardware queue when needed. 1642237041Sadrian */ 1643237041Sadrian#if 0 1644235750Sadrian if (txq != sc->sc_ac2q[pri]) { 1645235750Sadrian device_printf(sc->sc_dev, 1646235750Sadrian "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n", 1647235750Sadrian __func__, 1648235750Sadrian txq, 1649235750Sadrian txq->axq_qnum, 1650235750Sadrian pri, 1651235750Sadrian sc->sc_ac2q[pri], 1652235750Sadrian sc->sc_ac2q[pri]->axq_qnum); 1653235750Sadrian } 1654237041Sadrian#endif 1655235750Sadrian 1656218065Sadrian /* 1657218065Sadrian * Calculate miscellaneous flags. 1658218065Sadrian */ 1659218065Sadrian if (ismcast) { 1660218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1661218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1662218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1663218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1664218065Sadrian sc->sc_stats.ast_tx_rts++; 1665218065Sadrian } 1666218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1667218065Sadrian sc->sc_stats.ast_tx_noack++; 1668218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1669218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1670218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1671218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1672218065Sadrian sc->sc_stats.ast_tdma_ack++; 1673218065Sadrian ath_freetx(m0); 1674218065Sadrian return EIO; 1675218065Sadrian } 1676218065Sadrian#endif 1677218065Sadrian 1678218065Sadrian /* 1679227364Sadrian * Determine if a tx interrupt should be generated for 1680227364Sadrian * this descriptor. We take a tx interrupt to reap 1681227364Sadrian * descriptors when the h/w hits an EOL condition or 1682227364Sadrian * when the descriptor is specifically marked to generate 1683227364Sadrian * an interrupt. We periodically mark descriptors in this 1684227364Sadrian * way to insure timely replenishing of the supply needed 1685227364Sadrian * for sending frames. Defering interrupts reduces system 1686227364Sadrian * load and potentially allows more concurrent work to be 1687227364Sadrian * done but if done to aggressively can cause senders to 1688227364Sadrian * backup. 1689227364Sadrian * 1690227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1691227364Sadrian * dynamically through sysctl. 1692218065Sadrian */ 1693227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1694227364Sadrian txq->axq_intrcnt = 0; 1695227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1696227364Sadrian flags |= HAL_TXDESC_INTREQ; 1697227364Sadrian txq->axq_intrcnt = 0; 1698227364Sadrian } 1699218932Sadrian 1700227364Sadrian /* This point forward is actual TX bits */ 1701218065Sadrian 1702218065Sadrian /* 1703218065Sadrian * At this point we are committed to sending the frame 1704218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1705218065Sadrian * case this frame is part of frag chain. 1706218065Sadrian */ 1707218065Sadrian m0->m_nextpkt = NULL; 1708218065Sadrian 1709218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1710218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1711218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1712218065Sadrian 1713218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1714218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1715218065Sadrian 1716218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1717218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1718218065Sadrian if (iswep) 1719218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1720218065Sadrian if (isfrag) 1721218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1722218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1723218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1724218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1725218065Sadrian 1726218065Sadrian ieee80211_radiotap_tx(vap, m0); 1727218065Sadrian } 1728218065Sadrian 1729227364Sadrian /* Blank the legacy rate array */ 1730227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1731227364Sadrian 1732218065Sadrian /* 1733227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1734227364Sadrian * the rate scenario. 1735227364Sadrian */ 1736227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1737227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1738227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1739227364Sadrian 1740227364Sadrian /* Store the decided rate index values away */ 1741227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1742227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1743227364Sadrian bf->bf_state.bfs_atype = atype; 1744227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1745227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1746227364Sadrian bf->bf_state.bfs_try0 = try0; 1747227364Sadrian bf->bf_state.bfs_keyix = keyix; 1748227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1749233966Sadrian bf->bf_state.bfs_txflags = flags; 1750227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1751227364Sadrian 1752227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1753227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1754227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1755227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1756227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1757227364Sadrian 1758227364Sadrian return 0; 1759227364Sadrian} 1760227364Sadrian 1761227364Sadrian/* 1762240724Sadrian * Queue a frame to the hardware or software queue. 1763227364Sadrian * 1764227364Sadrian * This can be called by the net80211 code. 1765227364Sadrian * 1766227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1767227364Sadrian * XXX aggregate scheduler so its serialised? 1768240724Sadrian * 1769240724Sadrian * XXX When sending management frames via ath_raw_xmit(), 1770240724Sadrian * should CLRDMASK be set unconditionally? 1771227364Sadrian */ 1772227364Sadrianint 1773227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1774227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1775227364Sadrian{ 1776227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1777227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1778232764Sadrian int r = 0; 1779227364Sadrian u_int pri; 1780227364Sadrian int tid; 1781227364Sadrian struct ath_txq *txq; 1782227364Sadrian int ismcast; 1783227364Sadrian const struct ieee80211_frame *wh; 1784227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1785236872Sadrian ieee80211_seq seqno; 1786227364Sadrian uint8_t type, subtype; 1787227364Sadrian 1788243786Sadrian ATH_TX_LOCK_ASSERT(sc); 1789243786Sadrian 1790227364Sadrian /* 1791227364Sadrian * Determine the target hardware queue. 1792218065Sadrian * 1793234009Sadrian * For multicast frames, the txq gets overridden appropriately 1794234009Sadrian * depending upon the state of PS. 1795227364Sadrian * 1796227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1797227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1798227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1799227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1800227364Sadrian * having a node TID queued to multiple hardware TXQs. 1801227364Sadrian * This may change in the future but would require some locking 1802227364Sadrian * fudgery. 1803218065Sadrian */ 1804227364Sadrian pri = ath_tx_getac(sc, m0); 1805227364Sadrian tid = ath_tx_gettid(sc, m0); 1806218065Sadrian 1807227364Sadrian txq = sc->sc_ac2q[pri]; 1808227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1809227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1810227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1811227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1812227364Sadrian 1813232764Sadrian /* 1814232764Sadrian * Enforce how deep the multicast queue can grow. 1815232764Sadrian * 1816232764Sadrian * XXX duplicated in ath_raw_xmit(). 1817232764Sadrian */ 1818232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1819248750Sadrian if (sc->sc_cabq->axq_depth + sc->sc_cabq->fifo.axq_depth 1820248750Sadrian > sc->sc_txq_mcastq_maxdepth) { 1821232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1822232764Sadrian r = ENOBUFS; 1823232764Sadrian } 1824232764Sadrian if (r != 0) { 1825232764Sadrian m_freem(m0); 1826232764Sadrian return r; 1827232764Sadrian } 1828232764Sadrian } 1829232764Sadrian 1830227364Sadrian /* A-MPDU TX */ 1831227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1832227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1833227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1834227364Sadrian 1835236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1836236872Sadrian __func__, tid, pri, is_ampdu); 1837227364Sadrian 1838239051Sadrian /* Set local packet state, used to queue packets to hardware */ 1839239051Sadrian bf->bf_state.bfs_tid = tid; 1840244109Sadrian bf->bf_state.bfs_tx_queue = txq->axq_qnum; 1841239051Sadrian bf->bf_state.bfs_pri = pri; 1842239051Sadrian 1843248671Sadrian#if 1 1844232753Sadrian /* 1845234009Sadrian * When servicing one or more stations in power-save mode 1846234009Sadrian * (or) if there is some mcast data waiting on the mcast 1847234009Sadrian * queue (to prevent out of order delivery) multicast frames 1848234009Sadrian * must be bufferd until after the beacon. 1849234009Sadrian * 1850234009Sadrian * TODO: we should lock the mcastq before we check the length. 1851232753Sadrian */ 1852248671Sadrian if (sc->sc_cabq_enable && ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) { 1853227364Sadrian txq = &avp->av_mcastq; 1854239051Sadrian /* 1855239051Sadrian * Mark the frame as eventually belonging on the CAB 1856239051Sadrian * queue, so the descriptor setup functions will 1857239051Sadrian * correctly initialise the descriptor 'qcuId' field. 1858239051Sadrian */ 1859244109Sadrian bf->bf_state.bfs_tx_queue = sc->sc_cabq->axq_qnum; 1860239051Sadrian } 1861248671Sadrian#endif 1862227364Sadrian 1863227364Sadrian /* Do the generic frame setup */ 1864227364Sadrian /* XXX should just bzero the bf_state? */ 1865227364Sadrian bf->bf_state.bfs_dobaw = 0; 1866227364Sadrian 1867227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1868236880Sadrian /* 1869236880Sadrian * Don't do it whilst pending; the net80211 layer still 1870236880Sadrian * assigns them. 1871236880Sadrian */ 1872227364Sadrian if (is_ampdu_tx) { 1873227364Sadrian /* 1874227364Sadrian * Always call; this function will 1875227364Sadrian * handle making sure that null data frames 1876227364Sadrian * don't get a sequence number from the current 1877227364Sadrian * TID and thus mess with the BAW. 1878227364Sadrian */ 1879236872Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1880236874Sadrian 1881236874Sadrian /* 1882236874Sadrian * Don't add QoS NULL frames to the BAW. 1883236874Sadrian */ 1884236872Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1885236872Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1886227364Sadrian bf->bf_state.bfs_dobaw = 1; 1887227364Sadrian } 1888218240Sadrian } 1889218240Sadrian 1890218065Sadrian /* 1891227364Sadrian * If needed, the sequence number has been assigned. 1892227364Sadrian * Squirrel it away somewhere easy to get to. 1893218065Sadrian */ 1894236872Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1895227364Sadrian 1896227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1897227364Sadrian if (is_ampdu_pending) 1898227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1899227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1900227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1901227364Sadrian 1902227364Sadrian /* This also sets up the DMA map */ 1903234009Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0, txq); 1904227364Sadrian 1905227364Sadrian if (r != 0) 1906236880Sadrian goto done; 1907227364Sadrian 1908227364Sadrian /* At this point m0 could have changed! */ 1909227364Sadrian m0 = bf->bf_m; 1910227364Sadrian 1911227364Sadrian#if 1 1912218065Sadrian /* 1913227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1914227364Sadrian * destination hardware queue. Don't bother software 1915227364Sadrian * queuing it. 1916218065Sadrian */ 1917227364Sadrian /* 1918227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1919227364Sadrian * destination hardware queue. Don't bother software 1920227364Sadrian * queuing it, as the TID will now be paused. 1921227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1922227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1923227364Sadrian * It queues directly to hardware because the TID is paused 1924227364Sadrian * at this point (and won't be unpaused until the BAR has 1925227364Sadrian * either been TXed successfully or max retries has been 1926227364Sadrian * reached.) 1927227364Sadrian */ 1928227364Sadrian if (txq == &avp->av_mcastq) { 1929235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1930233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1931240724Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 1932227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1933227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1934227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1935235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1936227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1937240724Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 1938227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1939227364Sadrian } else { 1940227364Sadrian /* add to software queue */ 1941235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1942233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1943227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1944227364Sadrian } 1945227364Sadrian#else 1946227364Sadrian /* 1947227364Sadrian * For now, since there's no software queue, 1948227364Sadrian * direct-dispatch to the hardware. 1949227364Sadrian */ 1950240724Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 1951227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1952236880Sadrian#endif 1953236880Sadriandone: 1954218065Sadrian return 0; 1955218065Sadrian} 1956218065Sadrian 1957218065Sadrianstatic int 1958218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1959218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1960218065Sadrian const struct ieee80211_bpf_params *params) 1961218065Sadrian{ 1962218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1963218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1964218065Sadrian struct ath_hal *ah = sc->sc_ah; 1965218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1966218065Sadrian int error, ismcast, ismrr; 1967218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1968227364Sadrian u_int8_t rix, txrate; 1969218065Sadrian struct ieee80211_frame *wh; 1970227364Sadrian u_int flags; 1971218065Sadrian HAL_PKT_TYPE atype; 1972218065Sadrian const HAL_RATE_TABLE *rt; 1973218065Sadrian struct ath_desc *ds; 1974218065Sadrian u_int pri; 1975227364Sadrian int o_tid = -1; 1976227364Sadrian int do_override; 1977218065Sadrian 1978243786Sadrian ATH_TX_LOCK_ASSERT(sc); 1979243786Sadrian 1980218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1981218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1982218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1983218065Sadrian /* 1984218065Sadrian * Packet length must not include any 1985218065Sadrian * pad bytes; deduct them here. 1986218065Sadrian */ 1987218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1988218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1989218065Sadrian 1990240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 2, 1991240899Sadrian "ath_tx_raw_start: ni=%p, bf=%p, raw", ni, bf); 1992240899Sadrian 1993227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1994227364Sadrian __func__, ismcast); 1995227364Sadrian 1996236880Sadrian pri = params->ibp_pri & 3; 1997236880Sadrian /* Override pri if the frame isn't a QoS one */ 1998236880Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1999236880Sadrian pri = ath_tx_getac(sc, m0); 2000236880Sadrian 2001236880Sadrian /* XXX If it's an ADDBA, override the correct queue */ 2002236880Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 2003236880Sadrian 2004236880Sadrian /* Map ADDBA to the correct priority */ 2005236880Sadrian if (do_override) { 2006236880Sadrian#if 0 2007236880Sadrian device_printf(sc->sc_dev, 2008236880Sadrian "%s: overriding tid %d pri %d -> %d\n", 2009236880Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 2010236880Sadrian#endif 2011236880Sadrian pri = TID_TO_WME_AC(o_tid); 2012236880Sadrian } 2013236880Sadrian 2014218154Sadrian /* Handle encryption twiddling if needed */ 2015227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 2016227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 2017227364Sadrian &hdrlen, &pktlen, &keyix)) { 2018218154Sadrian ath_freetx(m0); 2019218154Sadrian return EIO; 2020218154Sadrian } 2021218154Sadrian /* packet header may have moved, reset our local pointer */ 2022218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 2023218065Sadrian 2024227364Sadrian /* Do the generic frame setup */ 2025227364Sadrian /* XXX should just bzero the bf_state? */ 2026227364Sadrian bf->bf_state.bfs_dobaw = 0; 2027227364Sadrian 2028218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 2029218065Sadrian if (error != 0) 2030218065Sadrian return error; 2031218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 2032218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 2033218065Sadrian bf->bf_node = ni; /* NB: held reference */ 2034218065Sadrian 2035240724Sadrian /* Always enable CLRDMASK for raw frames for now.. */ 2036218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 2037218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 2038218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 2039218065Sadrian flags |= HAL_TXDESC_RTSENA; 2040227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 2041227364Sadrian /* XXX assume 11g/11n protection? */ 2042227364Sadrian bf->bf_state.bfs_doprot = 1; 2043218065Sadrian flags |= HAL_TXDESC_CTSENA; 2044227364Sadrian } 2045218065Sadrian /* XXX leave ismcast to injector? */ 2046218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 2047218065Sadrian flags |= HAL_TXDESC_NOACK; 2048218065Sadrian 2049218065Sadrian rt = sc->sc_currates; 2050218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 2051218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 2052218065Sadrian txrate = rt->info[rix].rateCode; 2053218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 2054218065Sadrian txrate |= rt->info[rix].shortPreamble; 2055218065Sadrian sc->sc_txrix = rix; 2056218065Sadrian try0 = params->ibp_try0; 2057218065Sadrian ismrr = (params->ibp_try1 != 0); 2058218065Sadrian txantenna = params->ibp_pri >> 2; 2059218065Sadrian if (txantenna == 0) /* XXX? */ 2060218065Sadrian txantenna = sc->sc_txantenna; 2061218157Sadrian 2062227364Sadrian /* 2063227364Sadrian * Since ctsrate is fixed, store it away for later 2064227364Sadrian * use when the descriptor fields are being set. 2065227364Sadrian */ 2066227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 2067227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 2068218157Sadrian 2069218065Sadrian /* 2070218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 2071218065Sadrian * set the sequence number, duration, etc. 2072218065Sadrian */ 2073218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 2074218065Sadrian 2075218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 2076218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 2077218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 2078218065Sadrian 2079218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 2080218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 2081218065Sadrian 2082218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 2083218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 2084218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 2085218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 2086218065Sadrian if (m0->m_flags & M_FRAG) 2087218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 2088218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 2089218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 2090218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 2091218065Sadrian 2092218065Sadrian ieee80211_radiotap_tx(vap, m0); 2093218065Sadrian } 2094218065Sadrian 2095218065Sadrian /* 2096218065Sadrian * Formulate first tx descriptor with tx controls. 2097218065Sadrian */ 2098218065Sadrian ds = bf->bf_desc; 2099218065Sadrian /* XXX check return value? */ 2100227364Sadrian 2101227364Sadrian /* Store the decided rate index values away */ 2102227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 2103227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 2104227364Sadrian bf->bf_state.bfs_atype = atype; 2105227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 2106227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 2107227364Sadrian bf->bf_state.bfs_try0 = try0; 2108227364Sadrian bf->bf_state.bfs_keyix = keyix; 2109227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 2110233966Sadrian bf->bf_state.bfs_txflags = flags; 2111227364Sadrian bf->bf_state.bfs_shpream = 2112227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 2113218065Sadrian 2114239051Sadrian /* Set local packet state, used to queue packets to hardware */ 2115239051Sadrian bf->bf_state.bfs_tid = WME_AC_TO_TID(pri); 2116244109Sadrian bf->bf_state.bfs_tx_queue = sc->sc_ac2q[pri]->axq_qnum; 2117239051Sadrian bf->bf_state.bfs_pri = pri; 2118239051Sadrian 2119227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 2120227364Sadrian bf->bf_state.bfs_ctsrate = 0; 2121227364Sadrian bf->bf_state.bfs_ctsduration = 0; 2122227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 2123218240Sadrian 2124227364Sadrian /* Blank the legacy rate array */ 2125227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 2126218240Sadrian 2127227364Sadrian bf->bf_state.bfs_rc[0].rix = 2128227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 2129227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 2130227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 2131227364Sadrian 2132227364Sadrian if (ismrr) { 2133227364Sadrian int rix; 2134227364Sadrian 2135227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 2136227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 2137227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 2138227364Sadrian 2139227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 2140227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 2141227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 2142227364Sadrian 2143227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 2144227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 2145227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 2146218065Sadrian } 2147227364Sadrian /* 2148227364Sadrian * All the required rate control decisions have been made; 2149227364Sadrian * fill in the rc flags. 2150227364Sadrian */ 2151227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2152218065Sadrian 2153227364Sadrian /* NB: no buffered multicast in power save support */ 2154227364Sadrian 2155227364Sadrian /* 2156227364Sadrian * If we're overiding the ADDBA destination, dump directly 2157227364Sadrian * into the hardware queue, right after any pending 2158227364Sadrian * frames to that node are. 2159227364Sadrian */ 2160227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 2161227364Sadrian __func__, do_override); 2162227364Sadrian 2163240882Sadrian#if 1 2164227364Sadrian if (do_override) { 2165240724Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 2166227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 2167227364Sadrian } else { 2168227364Sadrian /* Queue to software queue */ 2169227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 2170227364Sadrian } 2171240882Sadrian#else 2172240882Sadrian /* Direct-dispatch to the hardware */ 2173240882Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 2174240882Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 2175240882Sadrian#endif 2176218065Sadrian return 0; 2177218065Sadrian} 2178218065Sadrian 2179227364Sadrian/* 2180227364Sadrian * Send a raw frame. 2181227364Sadrian * 2182227364Sadrian * This can be called by net80211. 2183227364Sadrian */ 2184218065Sadrianint 2185218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2186218065Sadrian const struct ieee80211_bpf_params *params) 2187218065Sadrian{ 2188218065Sadrian struct ieee80211com *ic = ni->ni_ic; 2189218065Sadrian struct ifnet *ifp = ic->ic_ifp; 2190218065Sadrian struct ath_softc *sc = ifp->if_softc; 2191218065Sadrian struct ath_buf *bf; 2192232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 2193232764Sadrian int error = 0; 2194218065Sadrian 2195227651Sadrian ATH_PCU_LOCK(sc); 2196227651Sadrian if (sc->sc_inreset_cnt > 0) { 2197227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 2198227651Sadrian __func__); 2199227651Sadrian error = EIO; 2200227651Sadrian ATH_PCU_UNLOCK(sc); 2201227651Sadrian goto bad0; 2202227651Sadrian } 2203227651Sadrian sc->sc_txstart_cnt++; 2204227651Sadrian ATH_PCU_UNLOCK(sc); 2205227651Sadrian 2206242391Sadrian ATH_TX_LOCK(sc); 2207242391Sadrian 2208218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 2209218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 2210218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 2211218065Sadrian "!running" : "invalid"); 2212218065Sadrian m_freem(m); 2213218065Sadrian error = ENETDOWN; 2214218065Sadrian goto bad; 2215218065Sadrian } 2216232764Sadrian 2217218065Sadrian /* 2218232764Sadrian * Enforce how deep the multicast queue can grow. 2219232764Sadrian * 2220232764Sadrian * XXX duplicated in ath_tx_start(). 2221232764Sadrian */ 2222232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2223248750Sadrian if (sc->sc_cabq->axq_depth + sc->sc_cabq->fifo.axq_depth 2224248750Sadrian > sc->sc_txq_mcastq_maxdepth) { 2225232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 2226232764Sadrian error = ENOBUFS; 2227232764Sadrian } 2228232764Sadrian 2229232764Sadrian if (error != 0) { 2230232764Sadrian m_freem(m); 2231232764Sadrian goto bad; 2232232764Sadrian } 2233232764Sadrian } 2234232764Sadrian 2235232764Sadrian /* 2236218065Sadrian * Grab a TX buffer and associated resources. 2237218065Sadrian */ 2238237000Sadrian bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 2239218065Sadrian if (bf == NULL) { 2240218065Sadrian sc->sc_stats.ast_tx_nobuf++; 2241218065Sadrian m_freem(m); 2242218065Sadrian error = ENOBUFS; 2243218065Sadrian goto bad; 2244218065Sadrian } 2245240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: m=%p, params=%p, bf=%p\n", 2246240899Sadrian m, params, bf); 2247218065Sadrian 2248218065Sadrian if (params == NULL) { 2249218065Sadrian /* 2250218065Sadrian * Legacy path; interpret frame contents to decide 2251218065Sadrian * precisely how to send the frame. 2252218065Sadrian */ 2253218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 2254218065Sadrian error = EIO; /* XXX */ 2255218065Sadrian goto bad2; 2256218065Sadrian } 2257218065Sadrian } else { 2258218065Sadrian /* 2259218065Sadrian * Caller supplied explicit parameters to use in 2260218065Sadrian * sending the frame. 2261218065Sadrian */ 2262218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 2263218065Sadrian error = EIO; /* XXX */ 2264218065Sadrian goto bad2; 2265218065Sadrian } 2266218065Sadrian } 2267218065Sadrian sc->sc_wd_timer = 5; 2268218065Sadrian ifp->if_opackets++; 2269218065Sadrian sc->sc_stats.ast_tx_raw++; 2270218065Sadrian 2271242271Sadrian /* 2272242271Sadrian * Update the TIM - if there's anything queued to the 2273242271Sadrian * software queue and power save is enabled, we should 2274242271Sadrian * set the TIM. 2275242271Sadrian */ 2276242271Sadrian ath_tx_update_tim(sc, ni, 1); 2277242271Sadrian 2278243787Sadrian ATH_TX_UNLOCK(sc); 2279243787Sadrian 2280227651Sadrian ATH_PCU_LOCK(sc); 2281227651Sadrian sc->sc_txstart_cnt--; 2282227651Sadrian ATH_PCU_UNLOCK(sc); 2283227651Sadrian 2284218065Sadrian return 0; 2285218065Sadrianbad2: 2286240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: bad2: m=%p, params=%p, " 2287240899Sadrian "bf=%p", 2288240899Sadrian m, 2289240899Sadrian params, 2290240899Sadrian bf); 2291218065Sadrian ATH_TXBUF_LOCK(sc); 2292236993Sadrian ath_returnbuf_head(sc, bf); 2293218065Sadrian ATH_TXBUF_UNLOCK(sc); 2294218065Sadrianbad: 2295242391Sadrian 2296242391Sadrian ATH_TX_UNLOCK(sc); 2297242391Sadrian 2298227651Sadrian ATH_PCU_LOCK(sc); 2299227651Sadrian sc->sc_txstart_cnt--; 2300227651Sadrian ATH_PCU_UNLOCK(sc); 2301227651Sadrianbad0: 2302240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 2, "ath_raw_xmit: bad0: m=%p, params=%p", 2303240899Sadrian m, params); 2304218065Sadrian ifp->if_oerrors++; 2305218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 2306218065Sadrian ieee80211_free_node(ni); 2307227651Sadrian 2308218065Sadrian return error; 2309218065Sadrian} 2310227364Sadrian 2311227364Sadrian/* Some helper functions */ 2312227364Sadrian 2313227364Sadrian/* 2314227364Sadrian * ADDBA (and potentially others) need to be placed in the same 2315227364Sadrian * hardware queue as the TID/node it's relating to. This is so 2316227364Sadrian * it goes out after any pending non-aggregate frames to the 2317227364Sadrian * same node/TID. 2318227364Sadrian * 2319227364Sadrian * If this isn't done, the ADDBA can go out before the frames 2320227364Sadrian * queued in hardware. Even though these frames have a sequence 2321227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 2322227364Sadrian * no frames whose sequence numbers are after the ADDBA should 2323227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 2324227364Sadrian * will simply drop them as being out of the BAW. 2325227364Sadrian * 2326227364Sadrian * The frames can't be appended to the TID software queue - it'll 2327227364Sadrian * never be sent out. So these frames have to be directly 2328227364Sadrian * dispatched to the hardware, rather than queued in software. 2329227364Sadrian * So if this function returns true, the TXQ has to be 2330227364Sadrian * overridden and it has to be directly dispatched. 2331227364Sadrian * 2332227364Sadrian * It's a dirty hack, but someone's gotta do it. 2333227364Sadrian */ 2334227364Sadrian 2335227364Sadrian/* 2336227364Sadrian * XXX doesn't belong here! 2337227364Sadrian */ 2338227364Sadrianstatic int 2339227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 2340227364Sadrian{ 2341227364Sadrian /* Type: Management frame? */ 2342227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 2343227364Sadrian IEEE80211_FC0_TYPE_MGT) 2344227364Sadrian return 0; 2345227364Sadrian 2346227364Sadrian /* Subtype: Action frame? */ 2347227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 2348227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 2349227364Sadrian return 0; 2350227364Sadrian 2351227364Sadrian return 1; 2352227364Sadrian} 2353227364Sadrian 2354227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 2355227364Sadrian/* 2356227364Sadrian * Return an alternate TID for ADDBA request frames. 2357227364Sadrian * 2358227364Sadrian * Yes, this likely should be done in the net80211 layer. 2359227364Sadrian */ 2360227364Sadrianstatic int 2361227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 2362227364Sadrian struct ieee80211_node *ni, 2363227364Sadrian struct mbuf *m0, int *tid) 2364227364Sadrian{ 2365227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 2366227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 2367227364Sadrian uint8_t *frm; 2368227364Sadrian uint16_t baparamset; 2369227364Sadrian 2370227364Sadrian /* Not action frame? Bail */ 2371227364Sadrian if (! ieee80211_is_action(wh)) 2372227364Sadrian return 0; 2373227364Sadrian 2374227364Sadrian /* XXX Not needed for frames we send? */ 2375227364Sadrian#if 0 2376227364Sadrian /* Correct length? */ 2377227364Sadrian if (! ieee80211_parse_action(ni, m)) 2378227364Sadrian return 0; 2379227364Sadrian#endif 2380227364Sadrian 2381227364Sadrian /* Extract out action frame */ 2382227364Sadrian frm = (u_int8_t *)&wh[1]; 2383227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 2384227364Sadrian 2385227364Sadrian /* Not ADDBA? Bail */ 2386227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 2387227364Sadrian return 0; 2388227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 2389227364Sadrian return 0; 2390227364Sadrian 2391227364Sadrian /* Extract TID, return it */ 2392227364Sadrian baparamset = le16toh(ia->rq_baparamset); 2393227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 2394227364Sadrian 2395227364Sadrian return 1; 2396227364Sadrian} 2397227364Sadrian#undef MS 2398227364Sadrian 2399227364Sadrian/* Per-node software queue operations */ 2400227364Sadrian 2401227364Sadrian/* 2402227364Sadrian * Add the current packet to the given BAW. 2403227364Sadrian * It is assumed that the current packet 2404227364Sadrian * 2405227364Sadrian * + fits inside the BAW; 2406227364Sadrian * + already has had a sequence number allocated. 2407227364Sadrian * 2408227364Sadrian * Since the BAW status may be modified by both the ath task and 2409227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2410227364Sadrian */ 2411227364Sadrianvoid 2412227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 2413227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 2414227364Sadrian{ 2415227364Sadrian int index, cindex; 2416227364Sadrian struct ieee80211_tx_ampdu *tap; 2417227364Sadrian 2418243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2419227364Sadrian 2420227364Sadrian if (bf->bf_state.bfs_isretried) 2421227364Sadrian return; 2422227364Sadrian 2423236886Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2424236886Sadrian 2425236880Sadrian if (! bf->bf_state.bfs_dobaw) { 2426236880Sadrian device_printf(sc->sc_dev, 2427236880Sadrian "%s: dobaw=0, seqno=%d, window %d:%d\n", 2428236880Sadrian __func__, 2429236880Sadrian SEQNO(bf->bf_state.bfs_seqno), 2430236880Sadrian tap->txa_start, 2431236880Sadrian tap->txa_wnd); 2432236880Sadrian } 2433236880Sadrian 2434227364Sadrian if (bf->bf_state.bfs_addedbaw) 2435227364Sadrian device_printf(sc->sc_dev, 2436236872Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 2437229949Sadrian "baw head=%d tail=%d\n", 2438236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2439229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2440229949Sadrian tid->baw_tail); 2441227364Sadrian 2442227364Sadrian /* 2443236880Sadrian * Verify that the given sequence number is not outside of the 2444236880Sadrian * BAW. Complain loudly if that's the case. 2445236880Sadrian */ 2446236880Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2447236880Sadrian SEQNO(bf->bf_state.bfs_seqno))) { 2448236880Sadrian device_printf(sc->sc_dev, 2449236880Sadrian "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; " 2450236880Sadrian "baw head=%d tail=%d\n", 2451236880Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2452236880Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2453236880Sadrian tid->baw_tail); 2454236880Sadrian } 2455236880Sadrian 2456236880Sadrian /* 2457227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2458227364Sadrian * the txa state contains the current baw start. 2459227364Sadrian */ 2460227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2461227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2462227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2463236872Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2464229949Sadrian "baw head=%d tail=%d\n", 2465236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2466229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2467229949Sadrian tid->baw_tail); 2468227364Sadrian 2469227364Sadrian 2470227364Sadrian#if 0 2471227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2472227364Sadrian#endif 2473227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2474227364Sadrian device_printf(sc->sc_dev, 2475227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2476227364Sadrian "head=%d, tail=%d)\n", 2477227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2478227364Sadrian device_printf(sc->sc_dev, 2479227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2480227364Sadrian __func__, 2481227364Sadrian tid->tx_buf[cindex], 2482227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2483227364Sadrian bf, 2484227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2485227364Sadrian ); 2486227364Sadrian } 2487227364Sadrian tid->tx_buf[cindex] = bf; 2488227364Sadrian 2489229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2490229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2491227364Sadrian tid->baw_tail = cindex; 2492227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2493227364Sadrian } 2494227364Sadrian} 2495227364Sadrian 2496227364Sadrian/* 2497227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2498227398Sadrian * 2499227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2500227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2501227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2502227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2503227398Sadrian * tracking array to maintain consistency. 2504227398Sadrian */ 2505227398Sadrianstatic void 2506227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2507227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2508227398Sadrian{ 2509227398Sadrian int index, cindex; 2510227398Sadrian struct ieee80211_tx_ampdu *tap; 2511227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2512227398Sadrian 2513243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2514227398Sadrian 2515227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2516227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2517227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2518227398Sadrian 2519227398Sadrian /* 2520227398Sadrian * Just warn for now; if it happens then we should find out 2521227398Sadrian * about it. It's highly likely the aggregation session will 2522227398Sadrian * soon hang. 2523227398Sadrian */ 2524227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2525227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2526227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2527227398Sadrian __func__); 2528227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2529227398Sadrian __func__, 2530227398Sadrian old_bf->bf_state.bfs_seqno, 2531227398Sadrian new_bf->bf_state.bfs_seqno); 2532227398Sadrian } 2533227398Sadrian 2534227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2535227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2536227398Sadrian " has m BA session may hang.\n", 2537227398Sadrian __func__); 2538227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2539227398Sadrian __func__, 2540227398Sadrian old_bf, new_bf); 2541227398Sadrian } 2542227398Sadrian 2543227398Sadrian tid->tx_buf[cindex] = new_bf; 2544227398Sadrian} 2545227398Sadrian 2546227398Sadrian/* 2547227364Sadrian * seq_start - left edge of BAW 2548227364Sadrian * seq_next - current/next sequence number to allocate 2549227364Sadrian * 2550227364Sadrian * Since the BAW status may be modified by both the ath task and 2551227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2552227364Sadrian */ 2553227364Sadrianstatic void 2554227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2555227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2556227364Sadrian{ 2557227364Sadrian int index, cindex; 2558227364Sadrian struct ieee80211_tx_ampdu *tap; 2559227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2560227364Sadrian 2561243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2562227364Sadrian 2563227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2564227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2565227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2566227364Sadrian 2567227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2568236872Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2569229949Sadrian "baw head=%d, tail=%d\n", 2570236872Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2571227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2572227364Sadrian 2573227364Sadrian /* 2574227364Sadrian * If this occurs then we have a big problem - something else 2575227364Sadrian * has slid tap->txa_start along without updating the BAW 2576227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2577227364Sadrian * completely busted. 2578227364Sadrian * 2579227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2580227364Sadrian * it's quite possible that a cloned buffer is making its way 2581227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2582227364Sadrian */ 2583227364Sadrian if (tid->tx_buf[cindex] != bf) { 2584227364Sadrian device_printf(sc->sc_dev, 2585227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2586227364Sadrian __func__, 2587227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2588227364Sadrian tid->tx_buf[cindex], 2589227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2590227364Sadrian } 2591227364Sadrian 2592227364Sadrian tid->tx_buf[cindex] = NULL; 2593227364Sadrian 2594229949Sadrian while (tid->baw_head != tid->baw_tail && 2595229949Sadrian !tid->tx_buf[tid->baw_head]) { 2596227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2597227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2598227364Sadrian } 2599229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2600229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2601227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2602227364Sadrian} 2603227364Sadrian 2604227364Sadrian/* 2605227364Sadrian * Mark the current node/TID as ready to TX. 2606227364Sadrian * 2607227364Sadrian * This is done to make it easy for the software scheduler to 2608227364Sadrian * find which nodes have data to send. 2609227364Sadrian * 2610227364Sadrian * The TXQ lock must be held. 2611227364Sadrian */ 2612227364Sadrianstatic void 2613227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2614227364Sadrian{ 2615227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2616227364Sadrian 2617243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2618227364Sadrian 2619227364Sadrian if (tid->paused) 2620227364Sadrian return; /* paused, can't schedule yet */ 2621227364Sadrian 2622227364Sadrian if (tid->sched) 2623227364Sadrian return; /* already scheduled */ 2624227364Sadrian 2625227364Sadrian tid->sched = 1; 2626227364Sadrian 2627227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2628227364Sadrian} 2629227364Sadrian 2630227364Sadrian/* 2631227364Sadrian * Mark the current node as no longer needing to be polled for 2632227364Sadrian * TX packets. 2633227364Sadrian * 2634227364Sadrian * The TXQ lock must be held. 2635227364Sadrian */ 2636227364Sadrianstatic void 2637227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2638227364Sadrian{ 2639227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2640227364Sadrian 2641243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2642227364Sadrian 2643227364Sadrian if (tid->sched == 0) 2644227364Sadrian return; 2645227364Sadrian 2646227364Sadrian tid->sched = 0; 2647227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2648227364Sadrian} 2649227364Sadrian 2650227364Sadrian/* 2651227364Sadrian * Assign a sequence number manually to the given frame. 2652227364Sadrian * 2653227364Sadrian * This should only be called for A-MPDU TX frames. 2654227364Sadrian */ 2655236872Sadrianstatic ieee80211_seq 2656227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2657227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2658227364Sadrian{ 2659227364Sadrian struct ieee80211_frame *wh; 2660227364Sadrian int tid, pri; 2661227364Sadrian ieee80211_seq seqno; 2662227364Sadrian uint8_t subtype; 2663227364Sadrian 2664227364Sadrian /* TID lookup */ 2665227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2666227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2667227364Sadrian tid = WME_AC_TO_TID(pri); 2668236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2669236872Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2670227364Sadrian 2671227364Sadrian /* XXX Is it a control frame? Ignore */ 2672227364Sadrian 2673227364Sadrian /* Does the packet require a sequence number? */ 2674227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2675227364Sadrian return -1; 2676227364Sadrian 2677243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2678236880Sadrian 2679227364Sadrian /* 2680227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2681227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2682227364Sadrian * 2683227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2684227364Sadrian * data frame sequence number in the aggregation state updates, so 2685227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2686227364Sadrian * RX side. 2687227364Sadrian */ 2688227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2689227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2690236880Sadrian /* XXX no locking for this TID? This is a bit of a problem. */ 2691227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2692227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2693227364Sadrian } else { 2694227364Sadrian /* Manually assign sequence number */ 2695227364Sadrian seqno = ni->ni_txseqs[tid]; 2696227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2697227364Sadrian } 2698227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2699227364Sadrian M_SEQNO_SET(m0, seqno); 2700227364Sadrian 2701227364Sadrian /* Return so caller can do something with it if needed */ 2702236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2703227364Sadrian return seqno; 2704227364Sadrian} 2705227364Sadrian 2706227364Sadrian/* 2707227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2708227364Sadrian * If the frame is out of BAW, queue. 2709227364Sadrian * Otherwise, schedule it as a single frame. 2710227364Sadrian */ 2711227364Sadrianstatic void 2712239051Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, 2713239051Sadrian struct ath_txq *txq, struct ath_buf *bf) 2714227364Sadrian{ 2715227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2716227364Sadrian struct ieee80211_tx_ampdu *tap; 2717227364Sadrian 2718243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2719227364Sadrian 2720227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2721227364Sadrian 2722227364Sadrian /* paused? queue */ 2723227364Sadrian if (tid->paused) { 2724241336Sadrian ATH_TID_INSERT_HEAD(tid, bf, bf_list); 2725233480Sadrian /* XXX don't sched - we're paused! */ 2726227364Sadrian return; 2727227364Sadrian } 2728227364Sadrian 2729227364Sadrian /* outside baw? queue */ 2730227364Sadrian if (bf->bf_state.bfs_dobaw && 2731227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2732227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2733241336Sadrian ATH_TID_INSERT_HEAD(tid, bf, bf_list); 2734227364Sadrian ath_tx_tid_sched(sc, tid); 2735227364Sadrian return; 2736227364Sadrian } 2737227364Sadrian 2738240180Sadrian /* 2739240180Sadrian * This is a temporary check and should be removed once 2740240180Sadrian * all the relevant code paths have been fixed. 2741240180Sadrian * 2742240180Sadrian * During aggregate retries, it's possible that the head 2743240180Sadrian * frame will fail (which has the bfs_aggr and bfs_nframes 2744240180Sadrian * fields set for said aggregate) and will be retried as 2745240180Sadrian * a single frame. In this instance, the values should 2746240180Sadrian * be reset or the completion code will get upset with you. 2747240180Sadrian */ 2748240180Sadrian if (bf->bf_state.bfs_aggr != 0 || bf->bf_state.bfs_nframes > 1) { 2749240180Sadrian device_printf(sc->sc_dev, "%s: bfs_aggr=%d, bfs_nframes=%d\n", 2750240180Sadrian __func__, 2751240180Sadrian bf->bf_state.bfs_aggr, 2752240180Sadrian bf->bf_state.bfs_nframes); 2753240180Sadrian bf->bf_state.bfs_aggr = 0; 2754240180Sadrian bf->bf_state.bfs_nframes = 1; 2755240180Sadrian } 2756240180Sadrian 2757240724Sadrian /* Update CLRDMASK just before this frame is queued */ 2758240724Sadrian ath_tx_update_clrdmask(sc, tid, bf); 2759240724Sadrian 2760227364Sadrian /* Direct dispatch to hardware */ 2761227364Sadrian ath_tx_do_ratelookup(sc, bf); 2762233989Sadrian ath_tx_calc_duration(sc, bf); 2763233989Sadrian ath_tx_calc_protection(sc, bf); 2764233989Sadrian ath_tx_set_rtscts(sc, bf); 2765227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2766227364Sadrian ath_tx_setds(sc, bf); 2767227364Sadrian 2768227364Sadrian /* Statistics */ 2769227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2770227364Sadrian 2771227364Sadrian /* Track per-TID hardware queue depth correctly */ 2772227364Sadrian tid->hwq_depth++; 2773227364Sadrian 2774227364Sadrian /* Add to BAW */ 2775227364Sadrian if (bf->bf_state.bfs_dobaw) { 2776227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2777227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2778227364Sadrian } 2779227364Sadrian 2780227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2781227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2782227364Sadrian 2783227364Sadrian /* Hand off to hardware */ 2784227364Sadrian ath_tx_handoff(sc, txq, bf); 2785227364Sadrian} 2786227364Sadrian 2787227364Sadrian/* 2788227364Sadrian * Attempt to send the packet. 2789227364Sadrian * If the queue isn't busy, direct-dispatch. 2790227364Sadrian * If the queue is busy enough, queue the given packet on the 2791227364Sadrian * relevant software queue. 2792227364Sadrian */ 2793227364Sadrianvoid 2794227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2795227364Sadrian struct ath_buf *bf) 2796227364Sadrian{ 2797227364Sadrian struct ath_node *an = ATH_NODE(ni); 2798227364Sadrian struct ieee80211_frame *wh; 2799227364Sadrian struct ath_tid *atid; 2800227364Sadrian int pri, tid; 2801227364Sadrian struct mbuf *m0 = bf->bf_m; 2802227364Sadrian 2803243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2804236880Sadrian 2805227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2806227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2807227364Sadrian pri = ath_tx_getac(sc, m0); 2808227364Sadrian tid = ath_tx_gettid(sc, m0); 2809227364Sadrian atid = &an->an_tid[tid]; 2810227364Sadrian 2811236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2812236872Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2813227364Sadrian 2814227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2815239051Sadrian /* XXX potentially duplicate info, re-check */ 2816227364Sadrian bf->bf_state.bfs_tid = tid; 2817244109Sadrian bf->bf_state.bfs_tx_queue = txq->axq_qnum; 2818227364Sadrian bf->bf_state.bfs_pri = pri; 2819227364Sadrian 2820227364Sadrian /* 2821227364Sadrian * If the hardware queue isn't busy, queue it directly. 2822227364Sadrian * If the hardware queue is busy, queue it. 2823227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2824227364Sadrian * queue it. 2825227364Sadrian */ 2826227364Sadrian if (atid->paused) { 2827227364Sadrian /* TID is paused, queue */ 2828236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2829241336Sadrian ATH_TID_INSERT_TAIL(atid, bf, bf_list); 2830227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2831227364Sadrian /* AMPDU pending; queue */ 2832236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2833241336Sadrian ATH_TID_INSERT_TAIL(atid, bf, bf_list); 2834227364Sadrian /* XXX sched? */ 2835227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2836227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2837236877Sadrian 2838236877Sadrian /* 2839236877Sadrian * Always queue the frame to the tail of the list. 2840236877Sadrian */ 2841241336Sadrian ATH_TID_INSERT_TAIL(atid, bf, bf_list); 2842236877Sadrian 2843236877Sadrian /* 2844236877Sadrian * If the hardware queue isn't busy, direct dispatch 2845236877Sadrian * the head frame in the list. Don't schedule the 2846236877Sadrian * TID - let it build some more frames first? 2847236877Sadrian * 2848236877Sadrian * Otherwise, schedule the TID. 2849236877Sadrian */ 2850248750Sadrian if (txq->axq_depth + txq->fifo.axq_depth < sc->sc_hwq_limit) { 2851241336Sadrian bf = ATH_TID_FIRST(atid); 2852241336Sadrian ATH_TID_REMOVE(atid, bf, bf_list); 2853240180Sadrian 2854240180Sadrian /* 2855240180Sadrian * Ensure it's definitely treated as a non-AMPDU 2856240180Sadrian * frame - this information may have been left 2857240180Sadrian * over from a previous attempt. 2858240180Sadrian */ 2859240180Sadrian bf->bf_state.bfs_aggr = 0; 2860240180Sadrian bf->bf_state.bfs_nframes = 1; 2861240180Sadrian 2862240180Sadrian /* Queue to the hardware */ 2863239051Sadrian ath_tx_xmit_aggr(sc, an, txq, bf); 2864233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2865236872Sadrian "%s: xmit_aggr\n", 2866236872Sadrian __func__); 2867229949Sadrian } else { 2868229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2869236872Sadrian "%s: ampdu; swq'ing\n", 2870236872Sadrian __func__); 2871240899Sadrian 2872227364Sadrian ath_tx_tid_sched(sc, atid); 2873227364Sadrian } 2874248750Sadrian } else if (txq->axq_depth + txq->fifo.axq_depth < sc->sc_hwq_limit) { 2875227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2876236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2877240926Sadrian /* See if clrdmask needs to be set */ 2878240926Sadrian ath_tx_update_clrdmask(sc, atid, bf); 2879227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2880227364Sadrian } else { 2881227364Sadrian /* Busy; queue */ 2882236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2883241336Sadrian ATH_TID_INSERT_TAIL(atid, bf, bf_list); 2884227364Sadrian ath_tx_tid_sched(sc, atid); 2885227364Sadrian } 2886227364Sadrian} 2887227364Sadrian 2888227364Sadrian/* 2889245708Sadrian * Only set the clrdmask bit if none of the nodes are currently 2890245708Sadrian * filtered. 2891245708Sadrian * 2892245708Sadrian * XXX TODO: go through all the callers and check to see 2893245708Sadrian * which are being called in the context of looping over all 2894245708Sadrian * TIDs (eg, if all tids are being paused, resumed, etc.) 2895245708Sadrian * That'll avoid O(n^2) complexity here. 2896245708Sadrian */ 2897245708Sadrianstatic void 2898245708Sadrianath_tx_set_clrdmask(struct ath_softc *sc, struct ath_node *an) 2899245708Sadrian{ 2900245708Sadrian int i; 2901245708Sadrian 2902245708Sadrian ATH_TX_LOCK_ASSERT(sc); 2903245708Sadrian 2904245708Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2905245708Sadrian if (an->an_tid[i].isfiltered == 1) 2906245739Sadrian return; 2907245708Sadrian } 2908245708Sadrian an->clrdmask = 1; 2909245708Sadrian} 2910245708Sadrian 2911245708Sadrian/* 2912227364Sadrian * Configure the per-TID node state. 2913227364Sadrian * 2914227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2915227364Sadrian * else to put it just yet. 2916227364Sadrian * 2917227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2918227364Sadrian */ 2919227364Sadrianvoid 2920227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2921227364Sadrian{ 2922227364Sadrian int i, j; 2923227364Sadrian struct ath_tid *atid; 2924227364Sadrian 2925227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2926227364Sadrian atid = &an->an_tid[i]; 2927240639Sadrian 2928240639Sadrian /* XXX now with this bzer(), is the field 0'ing needed? */ 2929240639Sadrian bzero(atid, sizeof(*atid)); 2930240639Sadrian 2931241336Sadrian TAILQ_INIT(&atid->tid_q); 2932241336Sadrian TAILQ_INIT(&atid->filtq.tid_q); 2933227364Sadrian atid->tid = i; 2934227364Sadrian atid->an = an; 2935227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2936227364Sadrian atid->tx_buf[j] = NULL; 2937227364Sadrian atid->baw_head = atid->baw_tail = 0; 2938227364Sadrian atid->paused = 0; 2939227364Sadrian atid->sched = 0; 2940227364Sadrian atid->hwq_depth = 0; 2941227364Sadrian atid->cleanup_inprogress = 0; 2942227364Sadrian if (i == IEEE80211_NONQOS_TID) 2943240946Sadrian atid->ac = ATH_NONQOS_TID_AC; 2944227364Sadrian else 2945227364Sadrian atid->ac = TID_TO_WME_AC(i); 2946227364Sadrian } 2947245708Sadrian an->clrdmask = 1; /* Always start by setting this bit */ 2948227364Sadrian} 2949227364Sadrian 2950227364Sadrian/* 2951227364Sadrian * Pause the current TID. This stops packets from being transmitted 2952227364Sadrian * on it. 2953227364Sadrian * 2954227364Sadrian * Since this is also called from upper layers as well as the driver, 2955227364Sadrian * it will get the TID lock. 2956227364Sadrian */ 2957227364Sadrianstatic void 2958227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2959227364Sadrian{ 2960233908Sadrian 2961243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2962227364Sadrian tid->paused++; 2963227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2964227364Sadrian __func__, tid->paused); 2965227364Sadrian} 2966227364Sadrian 2967227364Sadrian/* 2968227364Sadrian * Unpause the current TID, and schedule it if needed. 2969227364Sadrian */ 2970227364Sadrianstatic void 2971227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2972227364Sadrian{ 2973243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2974243786Sadrian 2975227364Sadrian tid->paused--; 2976227364Sadrian 2977227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2978227364Sadrian __func__, tid->paused); 2979227364Sadrian 2980241170Sadrian if (tid->paused) 2981227364Sadrian return; 2982227364Sadrian 2983241170Sadrian /* 2984241170Sadrian * Override the clrdmask configuration for the next frame 2985241170Sadrian * from this TID, just to get the ball rolling. 2986241170Sadrian */ 2987245708Sadrian ath_tx_set_clrdmask(sc, tid->an); 2988241170Sadrian 2989241170Sadrian if (tid->axq_depth == 0) 2990241170Sadrian return; 2991241170Sadrian 2992240639Sadrian /* XXX isfiltered shouldn't ever be 0 at this point */ 2993240639Sadrian if (tid->isfiltered == 1) { 2994240639Sadrian device_printf(sc->sc_dev, "%s: filtered?!\n", __func__); 2995240639Sadrian return; 2996240639Sadrian } 2997240639Sadrian 2998227364Sadrian ath_tx_tid_sched(sc, tid); 2999246450Sadrian 3000246450Sadrian /* 3001246450Sadrian * Queue the software TX scheduler. 3002246450Sadrian */ 3003246450Sadrian ath_tx_swq_kick(sc); 3004227364Sadrian} 3005227364Sadrian 3006227364Sadrian/* 3007240639Sadrian * Add the given ath_buf to the TID filtered frame list. 3008240639Sadrian * This requires the TID be filtered. 3009240639Sadrian */ 3010240639Sadrianstatic void 3011240639Sadrianath_tx_tid_filt_addbuf(struct ath_softc *sc, struct ath_tid *tid, 3012240639Sadrian struct ath_buf *bf) 3013240639Sadrian{ 3014240639Sadrian 3015243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3016243786Sadrian 3017240639Sadrian if (! tid->isfiltered) 3018240639Sadrian device_printf(sc->sc_dev, "%s: not filtered?!\n", __func__); 3019240639Sadrian 3020240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: bf=%p\n", __func__, bf); 3021240639Sadrian 3022240639Sadrian /* Set the retry bit and bump the retry counter */ 3023240639Sadrian ath_tx_set_retry(sc, bf); 3024240639Sadrian sc->sc_stats.ast_tx_swfiltered++; 3025240639Sadrian 3026241566Sadrian ATH_TID_FILT_INSERT_TAIL(tid, bf, bf_list); 3027240639Sadrian} 3028240639Sadrian 3029240639Sadrian/* 3030240639Sadrian * Handle a completed filtered frame from the given TID. 3031240639Sadrian * This just enables/pauses the filtered frame state if required 3032240639Sadrian * and appends the filtered frame to the filtered queue. 3033240639Sadrian */ 3034240639Sadrianstatic void 3035240639Sadrianath_tx_tid_filt_comp_buf(struct ath_softc *sc, struct ath_tid *tid, 3036240639Sadrian struct ath_buf *bf) 3037240639Sadrian{ 3038240639Sadrian 3039243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3040240639Sadrian 3041240639Sadrian if (! tid->isfiltered) { 3042240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: filter transition\n", 3043240639Sadrian __func__); 3044240639Sadrian tid->isfiltered = 1; 3045240639Sadrian ath_tx_tid_pause(sc, tid); 3046240639Sadrian } 3047240639Sadrian 3048240639Sadrian /* Add the frame to the filter queue */ 3049240639Sadrian ath_tx_tid_filt_addbuf(sc, tid, bf); 3050240639Sadrian} 3051240639Sadrian 3052240639Sadrian/* 3053240639Sadrian * Complete the filtered frame TX completion. 3054240639Sadrian * 3055240639Sadrian * If there are no more frames in the hardware queue, unpause/unfilter 3056240639Sadrian * the TID if applicable. Otherwise we will wait for a node PS transition 3057240639Sadrian * to unfilter. 3058240639Sadrian */ 3059240639Sadrianstatic void 3060240639Sadrianath_tx_tid_filt_comp_complete(struct ath_softc *sc, struct ath_tid *tid) 3061240639Sadrian{ 3062240639Sadrian struct ath_buf *bf; 3063240639Sadrian 3064243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3065240639Sadrian 3066240639Sadrian if (tid->hwq_depth != 0) 3067240639Sadrian return; 3068240639Sadrian 3069240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: hwq=0, transition back\n", 3070240639Sadrian __func__); 3071240639Sadrian tid->isfiltered = 0; 3072245708Sadrian /* XXX ath_tx_tid_resume() also calls ath_tx_set_clrdmask()! */ 3073245708Sadrian ath_tx_set_clrdmask(sc, tid->an); 3074240639Sadrian 3075240639Sadrian /* XXX this is really quite inefficient */ 3076241566Sadrian while ((bf = ATH_TID_FILT_LAST(tid, ath_bufhead_s)) != NULL) { 3077241566Sadrian ATH_TID_FILT_REMOVE(tid, bf, bf_list); 3078241336Sadrian ATH_TID_INSERT_HEAD(tid, bf, bf_list); 3079240639Sadrian } 3080240639Sadrian 3081240639Sadrian ath_tx_tid_resume(sc, tid); 3082240639Sadrian} 3083240639Sadrian 3084240639Sadrian/* 3085240639Sadrian * Called when a single (aggregate or otherwise) frame is completed. 3086240639Sadrian * 3087240639Sadrian * Returns 1 if the buffer could be added to the filtered list 3088240639Sadrian * (cloned or otherwise), 0 if the buffer couldn't be added to the 3089240639Sadrian * filtered list (failed clone; expired retry) and the caller should 3090240639Sadrian * free it and handle it like a failure (eg by sending a BAR.) 3091240639Sadrian */ 3092240639Sadrianstatic int 3093240639Sadrianath_tx_tid_filt_comp_single(struct ath_softc *sc, struct ath_tid *tid, 3094240639Sadrian struct ath_buf *bf) 3095240639Sadrian{ 3096240639Sadrian struct ath_buf *nbf; 3097240639Sadrian int retval; 3098240639Sadrian 3099243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3100240639Sadrian 3101240639Sadrian /* 3102240639Sadrian * Don't allow a filtered frame to live forever. 3103240639Sadrian */ 3104240639Sadrian if (bf->bf_state.bfs_retries > SWMAX_RETRIES) { 3105241170Sadrian sc->sc_stats.ast_tx_swretrymax++; 3106240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3107240639Sadrian "%s: bf=%p, seqno=%d, exceeded retries\n", 3108240639Sadrian __func__, 3109240639Sadrian bf, 3110240639Sadrian bf->bf_state.bfs_seqno); 3111240639Sadrian return (0); 3112240639Sadrian } 3113240639Sadrian 3114240639Sadrian /* 3115240639Sadrian * A busy buffer can't be added to the retry list. 3116240639Sadrian * It needs to be cloned. 3117240639Sadrian */ 3118240639Sadrian if (bf->bf_flags & ATH_BUF_BUSY) { 3119240639Sadrian nbf = ath_tx_retry_clone(sc, tid->an, tid, bf); 3120240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3121240639Sadrian "%s: busy buffer clone: %p -> %p\n", 3122240639Sadrian __func__, bf, nbf); 3123240639Sadrian } else { 3124240639Sadrian nbf = bf; 3125240639Sadrian } 3126240639Sadrian 3127240639Sadrian if (nbf == NULL) { 3128240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3129240639Sadrian "%s: busy buffer couldn't be cloned (%p)!\n", 3130240639Sadrian __func__, bf); 3131240639Sadrian retval = 1; 3132240639Sadrian } else { 3133240639Sadrian ath_tx_tid_filt_comp_buf(sc, tid, nbf); 3134240639Sadrian retval = 0; 3135240639Sadrian } 3136240639Sadrian ath_tx_tid_filt_comp_complete(sc, tid); 3137240639Sadrian 3138240639Sadrian return (retval); 3139240639Sadrian} 3140240639Sadrian 3141240639Sadrianstatic void 3142240639Sadrianath_tx_tid_filt_comp_aggr(struct ath_softc *sc, struct ath_tid *tid, 3143240639Sadrian struct ath_buf *bf_first, ath_bufhead *bf_q) 3144240639Sadrian{ 3145240639Sadrian struct ath_buf *bf, *bf_next, *nbf; 3146240639Sadrian 3147243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3148240639Sadrian 3149240639Sadrian bf = bf_first; 3150240639Sadrian while (bf) { 3151240639Sadrian bf_next = bf->bf_next; 3152240639Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3153240639Sadrian 3154240639Sadrian /* 3155240639Sadrian * Don't allow a filtered frame to live forever. 3156240639Sadrian */ 3157240639Sadrian if (bf->bf_state.bfs_retries > SWMAX_RETRIES) { 3158247029Sadrian sc->sc_stats.ast_tx_swretrymax++; 3159240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3160240639Sadrian "%s: bf=%p, seqno=%d, exceeded retries\n", 3161240639Sadrian __func__, 3162240639Sadrian bf, 3163240639Sadrian bf->bf_state.bfs_seqno); 3164240639Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3165240639Sadrian goto next; 3166240639Sadrian } 3167240639Sadrian 3168240639Sadrian if (bf->bf_flags & ATH_BUF_BUSY) { 3169240639Sadrian nbf = ath_tx_retry_clone(sc, tid->an, tid, bf); 3170240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3171240639Sadrian "%s: busy buffer cloned: %p -> %p", 3172240639Sadrian __func__, bf, nbf); 3173240639Sadrian } else { 3174240639Sadrian nbf = bf; 3175240639Sadrian } 3176240639Sadrian 3177240639Sadrian /* 3178240639Sadrian * If the buffer couldn't be cloned, add it to bf_q; 3179240639Sadrian * the caller will free the buffer(s) as required. 3180240639Sadrian */ 3181240639Sadrian if (nbf == NULL) { 3182240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3183240639Sadrian "%s: buffer couldn't be cloned! (%p)\n", 3184240639Sadrian __func__, bf); 3185240639Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3186240639Sadrian } else { 3187240639Sadrian ath_tx_tid_filt_comp_buf(sc, tid, nbf); 3188240639Sadrian } 3189240639Sadriannext: 3190240639Sadrian bf = bf_next; 3191240639Sadrian } 3192240639Sadrian 3193240639Sadrian ath_tx_tid_filt_comp_complete(sc, tid); 3194240639Sadrian} 3195240639Sadrian 3196240639Sadrian/* 3197233908Sadrian * Suspend the queue because we need to TX a BAR. 3198233908Sadrian */ 3199233908Sadrianstatic void 3200233908Sadrianath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid) 3201233908Sadrian{ 3202233908Sadrian 3203243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3204243786Sadrian 3205235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3206235676Sadrian "%s: tid=%p, bar_wait=%d, bar_tx=%d, called\n", 3207233908Sadrian __func__, 3208235676Sadrian tid, 3209235676Sadrian tid->bar_wait, 3210235676Sadrian tid->bar_tx); 3211233908Sadrian 3212233908Sadrian /* We shouldn't be called when bar_tx is 1 */ 3213233908Sadrian if (tid->bar_tx) { 3214233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx is 1?!\n", 3215233908Sadrian __func__); 3216233908Sadrian } 3217233908Sadrian 3218233908Sadrian /* If we've already been called, just be patient. */ 3219233908Sadrian if (tid->bar_wait) 3220233908Sadrian return; 3221233908Sadrian 3222233908Sadrian /* Wait! */ 3223233908Sadrian tid->bar_wait = 1; 3224233908Sadrian 3225233908Sadrian /* Only one pause, no matter how many frames fail */ 3226233908Sadrian ath_tx_tid_pause(sc, tid); 3227233908Sadrian} 3228233908Sadrian 3229233908Sadrian/* 3230233908Sadrian * We've finished with BAR handling - either we succeeded or 3231233908Sadrian * failed. Either way, unsuspend TX. 3232233908Sadrian */ 3233233908Sadrianstatic void 3234233908Sadrianath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid) 3235233908Sadrian{ 3236233908Sadrian 3237243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3238243786Sadrian 3239235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3240233908Sadrian "%s: tid=%p, called\n", 3241233908Sadrian __func__, 3242233908Sadrian tid); 3243233908Sadrian 3244233908Sadrian if (tid->bar_tx == 0 || tid->bar_wait == 0) { 3245233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx=%d, bar_wait=%d: ?\n", 3246233908Sadrian __func__, tid->bar_tx, tid->bar_wait); 3247233908Sadrian } 3248233908Sadrian 3249233908Sadrian tid->bar_tx = tid->bar_wait = 0; 3250233908Sadrian ath_tx_tid_resume(sc, tid); 3251233908Sadrian} 3252233908Sadrian 3253233908Sadrian/* 3254233908Sadrian * Return whether we're ready to TX a BAR frame. 3255233908Sadrian * 3256233908Sadrian * Requires the TID lock be held. 3257233908Sadrian */ 3258233908Sadrianstatic int 3259233908Sadrianath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid) 3260233908Sadrian{ 3261233908Sadrian 3262243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3263233908Sadrian 3264233908Sadrian if (tid->bar_wait == 0 || tid->hwq_depth > 0) 3265233908Sadrian return (0); 3266233908Sadrian 3267235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, "%s: tid=%p (%d), bar ready\n", 3268235491Sadrian __func__, tid, tid->tid); 3269235491Sadrian 3270233908Sadrian return (1); 3271233908Sadrian} 3272233908Sadrian 3273233908Sadrian/* 3274233908Sadrian * Check whether the current TID is ready to have a BAR 3275233908Sadrian * TXed and if so, do the TX. 3276233908Sadrian * 3277233908Sadrian * Since the TID/TXQ lock can't be held during a call to 3278233908Sadrian * ieee80211_send_bar(), we have to do the dirty thing of unlocking it, 3279233908Sadrian * sending the BAR and locking it again. 3280233908Sadrian * 3281233908Sadrian * Eventually, the code to send the BAR should be broken out 3282233908Sadrian * from this routine so the lock doesn't have to be reacquired 3283233908Sadrian * just to be immediately dropped by the caller. 3284233908Sadrian */ 3285233908Sadrianstatic void 3286233908Sadrianath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid) 3287233908Sadrian{ 3288233908Sadrian struct ieee80211_tx_ampdu *tap; 3289233908Sadrian 3290243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3291233908Sadrian 3292235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3293233908Sadrian "%s: tid=%p, called\n", 3294233908Sadrian __func__, 3295233908Sadrian tid); 3296233908Sadrian 3297233908Sadrian tap = ath_tx_get_tx_tid(tid->an, tid->tid); 3298233908Sadrian 3299233908Sadrian /* 3300233908Sadrian * This is an error condition! 3301233908Sadrian */ 3302233908Sadrian if (tid->bar_wait == 0 || tid->bar_tx == 1) { 3303233908Sadrian device_printf(sc->sc_dev, 3304233908Sadrian "%s: tid=%p, bar_tx=%d, bar_wait=%d: ?\n", 3305233908Sadrian __func__, 3306233908Sadrian tid, 3307233908Sadrian tid->bar_tx, 3308233908Sadrian tid->bar_wait); 3309233908Sadrian return; 3310233908Sadrian } 3311233908Sadrian 3312233908Sadrian /* Don't do anything if we still have pending frames */ 3313233908Sadrian if (tid->hwq_depth > 0) { 3314235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3315233908Sadrian "%s: tid=%p, hwq_depth=%d, waiting\n", 3316233908Sadrian __func__, 3317233908Sadrian tid, 3318233908Sadrian tid->hwq_depth); 3319233908Sadrian return; 3320233908Sadrian } 3321233908Sadrian 3322233908Sadrian /* We're now about to TX */ 3323233908Sadrian tid->bar_tx = 1; 3324233908Sadrian 3325233908Sadrian /* 3326240724Sadrian * Override the clrdmask configuration for the next frame, 3327240724Sadrian * just to get the ball rolling. 3328240724Sadrian */ 3329245708Sadrian ath_tx_set_clrdmask(sc, tid->an); 3330240724Sadrian 3331240724Sadrian /* 3332233908Sadrian * Calculate new BAW left edge, now that all frames have either 3333233908Sadrian * succeeded or failed. 3334233908Sadrian * 3335233908Sadrian * XXX verify this is _actually_ the valid value to begin at! 3336233908Sadrian */ 3337235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3338233908Sadrian "%s: tid=%p, new BAW left edge=%d\n", 3339233908Sadrian __func__, 3340233908Sadrian tid, 3341233908Sadrian tap->txa_start); 3342233908Sadrian 3343233908Sadrian /* Try sending the BAR frame */ 3344233908Sadrian /* We can't hold the lock here! */ 3345233908Sadrian 3346243786Sadrian ATH_TX_UNLOCK(sc); 3347233908Sadrian if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) { 3348233908Sadrian /* Success? Now we wait for notification that it's done */ 3349243786Sadrian ATH_TX_LOCK(sc); 3350233908Sadrian return; 3351233908Sadrian } 3352233908Sadrian 3353233908Sadrian /* Failure? For now, warn loudly and continue */ 3354243786Sadrian ATH_TX_LOCK(sc); 3355233908Sadrian device_printf(sc->sc_dev, "%s: tid=%p, failed to TX BAR, continue!\n", 3356233908Sadrian __func__, tid); 3357233908Sadrian ath_tx_tid_bar_unsuspend(sc, tid); 3358233908Sadrian} 3359233908Sadrian 3360240639Sadrianstatic void 3361240639Sadrianath_tx_tid_drain_pkt(struct ath_softc *sc, struct ath_node *an, 3362240639Sadrian struct ath_tid *tid, ath_bufhead *bf_cq, struct ath_buf *bf) 3363240639Sadrian{ 3364233908Sadrian 3365243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3366240639Sadrian 3367240639Sadrian /* 3368240639Sadrian * If the current TID is running AMPDU, update 3369240639Sadrian * the BAW. 3370240639Sadrian */ 3371240639Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 3372240639Sadrian bf->bf_state.bfs_dobaw) { 3373240639Sadrian /* 3374240639Sadrian * Only remove the frame from the BAW if it's 3375240639Sadrian * been transmitted at least once; this means 3376240639Sadrian * the frame was in the BAW to begin with. 3377240639Sadrian */ 3378240639Sadrian if (bf->bf_state.bfs_retries > 0) { 3379240639Sadrian ath_tx_update_baw(sc, an, tid, bf); 3380240639Sadrian bf->bf_state.bfs_dobaw = 0; 3381240639Sadrian } 3382247135Sadrian#if 0 3383240639Sadrian /* 3384240639Sadrian * This has become a non-fatal error now 3385240639Sadrian */ 3386240639Sadrian if (! bf->bf_state.bfs_addedbaw) 3387240639Sadrian device_printf(sc->sc_dev, 3388240639Sadrian "%s: wasn't added: seqno %d\n", 3389240639Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3390247135Sadrian#endif 3391240639Sadrian } 3392248671Sadrian 3393248671Sadrian /* Strip it out of an aggregate list if it was in one */ 3394248671Sadrian bf->bf_next = NULL; 3395248671Sadrian 3396248671Sadrian /* Insert on the free queue to be freed by the caller */ 3397240639Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 3398240639Sadrian} 3399240639Sadrian 3400240639Sadrianstatic void 3401240639Sadrianath_tx_tid_drain_print(struct ath_softc *sc, struct ath_node *an, 3402240899Sadrian const char *pfx, struct ath_tid *tid, struct ath_buf *bf) 3403240639Sadrian{ 3404240639Sadrian struct ieee80211_node *ni = &an->an_node; 3405240639Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3406240639Sadrian struct ieee80211_tx_ampdu *tap; 3407240639Sadrian 3408240639Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3409240639Sadrian 3410240639Sadrian device_printf(sc->sc_dev, 3411240899Sadrian "%s: %s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 3412240639Sadrian "seqno=%d, retry=%d\n", 3413240899Sadrian __func__, pfx, ni, bf, 3414240639Sadrian bf->bf_state.bfs_addedbaw, 3415240639Sadrian bf->bf_state.bfs_dobaw, 3416240639Sadrian SEQNO(bf->bf_state.bfs_seqno), 3417240639Sadrian bf->bf_state.bfs_retries); 3418240639Sadrian device_printf(sc->sc_dev, 3419240899Sadrian "%s: node %p: bf=%p: txq[%d] axq_depth=%d, axq_aggr_depth=%d\n", 3420240724Sadrian __func__, ni, bf, 3421240899Sadrian txq->axq_qnum, 3422240899Sadrian txq->axq_depth, 3423240899Sadrian txq->axq_aggr_depth); 3424240724Sadrian 3425240724Sadrian device_printf(sc->sc_dev, 3426240639Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d, isfiltered=%d\n", 3427240639Sadrian __func__, ni, bf, 3428240639Sadrian tid->axq_depth, 3429240639Sadrian tid->hwq_depth, 3430240639Sadrian tid->bar_wait, 3431240639Sadrian tid->isfiltered); 3432240639Sadrian device_printf(sc->sc_dev, 3433240724Sadrian "%s: node %p: tid %d: " 3434240724Sadrian "sched=%d, paused=%d, " 3435240724Sadrian "incomp=%d, baw_head=%d, " 3436240639Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 3437240724Sadrian __func__, ni, tid->tid, 3438240724Sadrian tid->sched, tid->paused, 3439240724Sadrian tid->incomp, tid->baw_head, 3440240639Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 3441240639Sadrian ni->ni_txseqs[tid->tid]); 3442240639Sadrian 3443240639Sadrian /* XXX Dump the frame, see what it is? */ 3444240639Sadrian ieee80211_dump_pkt(ni->ni_ic, 3445240639Sadrian mtod(bf->bf_m, const uint8_t *), 3446240639Sadrian bf->bf_m->m_len, 0, -1); 3447240639Sadrian} 3448240639Sadrian 3449233908Sadrian/* 3450227364Sadrian * Free any packets currently pending in the software TX queue. 3451227364Sadrian * 3452227364Sadrian * This will be called when a node is being deleted. 3453227364Sadrian * 3454227364Sadrian * It can also be called on an active node during an interface 3455227364Sadrian * reset or state transition. 3456227364Sadrian * 3457227364Sadrian * (From Linux/reference): 3458227364Sadrian * 3459227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 3460227364Sadrian * sequence number(s) without setting the retry bit. The 3461227364Sadrian * alternative is to give up on these and BAR the receiver's window 3462227364Sadrian * forward. 3463227364Sadrian */ 3464227364Sadrianstatic void 3465229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 3466229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 3467227364Sadrian{ 3468227364Sadrian struct ath_buf *bf; 3469227364Sadrian struct ieee80211_tx_ampdu *tap; 3470227364Sadrian struct ieee80211_node *ni = &an->an_node; 3471240639Sadrian int t; 3472227364Sadrian 3473227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3474227364Sadrian 3475243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3476227364Sadrian 3477227364Sadrian /* Walk the queue, free frames */ 3478240639Sadrian t = 0; 3479227364Sadrian for (;;) { 3480241336Sadrian bf = ATH_TID_FIRST(tid); 3481227364Sadrian if (bf == NULL) { 3482227364Sadrian break; 3483227364Sadrian } 3484227364Sadrian 3485227364Sadrian if (t == 0) { 3486240899Sadrian ath_tx_tid_drain_print(sc, an, "norm", tid, bf); 3487240639Sadrian t = 1; 3488240639Sadrian } 3489229165Sadrian 3490241336Sadrian ATH_TID_REMOVE(tid, bf, bf_list); 3491240639Sadrian ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf); 3492240639Sadrian } 3493229165Sadrian 3494240639Sadrian /* And now, drain the filtered frame queue */ 3495240639Sadrian t = 0; 3496240639Sadrian for (;;) { 3497241566Sadrian bf = ATH_TID_FILT_FIRST(tid); 3498240639Sadrian if (bf == NULL) 3499240639Sadrian break; 3500240639Sadrian 3501240639Sadrian if (t == 0) { 3502240899Sadrian ath_tx_tid_drain_print(sc, an, "filt", tid, bf); 3503233897Sadrian t = 1; 3504227364Sadrian } 3505227364Sadrian 3506241566Sadrian ATH_TID_FILT_REMOVE(tid, bf, bf_list); 3507240639Sadrian ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf); 3508227364Sadrian } 3509227364Sadrian 3510227364Sadrian /* 3511240724Sadrian * Override the clrdmask configuration for the next frame 3512240724Sadrian * in case there is some future transmission, just to get 3513240724Sadrian * the ball rolling. 3514240724Sadrian * 3515240724Sadrian * This won't hurt things if the TID is about to be freed. 3516240724Sadrian */ 3517245708Sadrian ath_tx_set_clrdmask(sc, tid->an); 3518240724Sadrian 3519240724Sadrian /* 3520227364Sadrian * Now that it's completed, grab the TID lock and update 3521227364Sadrian * the sequence number and BAW window. 3522227364Sadrian * Because sequence numbers have been assigned to frames 3523227364Sadrian * that haven't been sent yet, it's entirely possible 3524227364Sadrian * we'll be called with some pending frames that have not 3525227364Sadrian * been transmitted. 3526227364Sadrian * 3527227364Sadrian * The cleaner solution is to do the sequence number allocation 3528227364Sadrian * when the packet is first transmitted - and thus the "retries" 3529227364Sadrian * check above would be enough to update the BAW/seqno. 3530227364Sadrian */ 3531227364Sadrian 3532227364Sadrian /* But don't do it for non-QoS TIDs */ 3533227364Sadrian if (tap) { 3534227364Sadrian#if 0 3535227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3536227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 3537227364Sadrian __func__, an, tid->tid, tap->txa_start); 3538227364Sadrian#endif 3539227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 3540227364Sadrian tid->baw_tail = tid->baw_head; 3541227364Sadrian } 3542227364Sadrian} 3543227364Sadrian 3544227364Sadrian/* 3545227364Sadrian * Flush all software queued packets for the given node. 3546227364Sadrian * 3547227364Sadrian * This occurs when a completion handler frees the last buffer 3548227364Sadrian * for a node, and the node is thus freed. This causes the node 3549227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 3550227364Sadrian */ 3551227364Sadrianvoid 3552227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 3553227364Sadrian{ 3554227364Sadrian int tid; 3555227364Sadrian ath_bufhead bf_cq; 3556227364Sadrian struct ath_buf *bf; 3557227364Sadrian 3558227364Sadrian TAILQ_INIT(&bf_cq); 3559227364Sadrian 3560240899Sadrian ATH_KTR(sc, ATH_KTR_NODE, 1, "ath_tx_node_flush: flush node; ni=%p", 3561240899Sadrian &an->an_node); 3562240899Sadrian 3563243786Sadrian ATH_TX_LOCK(sc); 3564227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 3565227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3566227364Sadrian 3567227364Sadrian /* Free packets */ 3568227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 3569240914Sadrian /* Remove this tid from the list of active tids */ 3570240914Sadrian ath_tx_tid_unsched(sc, atid); 3571227364Sadrian } 3572243786Sadrian ATH_TX_UNLOCK(sc); 3573227364Sadrian 3574227364Sadrian /* Handle completed frames */ 3575227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3576227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3577227364Sadrian ath_tx_default_comp(sc, bf, 0); 3578227364Sadrian } 3579227364Sadrian} 3580227364Sadrian 3581227364Sadrian/* 3582227364Sadrian * Drain all the software TXQs currently with traffic queued. 3583227364Sadrian */ 3584227364Sadrianvoid 3585227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 3586227364Sadrian{ 3587227364Sadrian struct ath_tid *tid; 3588227364Sadrian ath_bufhead bf_cq; 3589227364Sadrian struct ath_buf *bf; 3590227364Sadrian 3591227364Sadrian TAILQ_INIT(&bf_cq); 3592243786Sadrian ATH_TX_LOCK(sc); 3593227364Sadrian 3594227364Sadrian /* 3595227364Sadrian * Iterate over all active tids for the given txq, 3596227364Sadrian * flushing and unsched'ing them 3597227364Sadrian */ 3598227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 3599227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 3600227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 3601227364Sadrian ath_tx_tid_unsched(sc, tid); 3602227364Sadrian } 3603227364Sadrian 3604243786Sadrian ATH_TX_UNLOCK(sc); 3605227364Sadrian 3606227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3607227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3608227364Sadrian ath_tx_default_comp(sc, bf, 0); 3609227364Sadrian } 3610227364Sadrian} 3611227364Sadrian 3612227364Sadrian/* 3613227364Sadrian * Handle completion of non-aggregate session frames. 3614240883Sadrian * 3615240883Sadrian * This (currently) doesn't implement software retransmission of 3616240883Sadrian * non-aggregate frames! 3617240883Sadrian * 3618240883Sadrian * Software retransmission of non-aggregate frames needs to obey 3619240883Sadrian * the strict sequence number ordering, and drop any frames that 3620240883Sadrian * will fail this. 3621240883Sadrian * 3622240883Sadrian * For now, filtered frames and frame transmission will cause 3623240883Sadrian * all kinds of issues. So we don't support them. 3624240883Sadrian * 3625240883Sadrian * So anyone queuing frames via ath_tx_normal_xmit() or 3626240883Sadrian * ath_tx_hw_queue_norm() must override and set CLRDMASK. 3627227364Sadrian */ 3628227364Sadrianvoid 3629227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3630227364Sadrian{ 3631227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3632227364Sadrian struct ath_node *an = ATH_NODE(ni); 3633227364Sadrian int tid = bf->bf_state.bfs_tid; 3634227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3635227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3636227364Sadrian 3637227364Sadrian /* The TID state is protected behind the TXQ lock */ 3638243786Sadrian ATH_TX_LOCK(sc); 3639227364Sadrian 3640227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 3641227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 3642227364Sadrian 3643227364Sadrian atid->hwq_depth--; 3644240639Sadrian 3645240883Sadrian#if 0 3646240883Sadrian /* 3647240883Sadrian * If the frame was filtered, stick it on the filter frame 3648240883Sadrian * queue and complain about it. It shouldn't happen! 3649240883Sadrian */ 3650240883Sadrian if ((ts->ts_status & HAL_TXERR_FILT) || 3651240883Sadrian (ts->ts_status != 0 && atid->isfiltered)) { 3652240883Sadrian device_printf(sc->sc_dev, 3653240883Sadrian "%s: isfiltered=%d, ts_status=%d: huh?\n", 3654240883Sadrian __func__, 3655240883Sadrian atid->isfiltered, 3656240883Sadrian ts->ts_status); 3657240883Sadrian ath_tx_tid_filt_comp_buf(sc, atid, bf); 3658240883Sadrian } 3659240883Sadrian#endif 3660240639Sadrian if (atid->isfiltered) 3661240883Sadrian device_printf(sc->sc_dev, "%s: filtered?!\n", __func__); 3662227364Sadrian if (atid->hwq_depth < 0) 3663227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3664227364Sadrian __func__, atid->hwq_depth); 3665240639Sadrian 3666240639Sadrian /* 3667240639Sadrian * If the queue is filtered, potentially mark it as complete 3668240639Sadrian * and reschedule it as needed. 3669240639Sadrian * 3670240639Sadrian * This is required as there may be a subsequent TX descriptor 3671240639Sadrian * for this end-node that has CLRDMASK set, so it's quite possible 3672240639Sadrian * that a filtered frame will be followed by a non-filtered 3673240639Sadrian * (complete or otherwise) frame. 3674240639Sadrian * 3675240639Sadrian * XXX should we do this before we complete the frame? 3676240639Sadrian */ 3677240639Sadrian if (atid->isfiltered) 3678240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 3679243786Sadrian ATH_TX_UNLOCK(sc); 3680227364Sadrian 3681227364Sadrian /* 3682227364Sadrian * punt to rate control if we're not being cleaned up 3683227364Sadrian * during a hw queue drain and the frame wanted an ACK. 3684227364Sadrian */ 3685233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3686227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3687227364Sadrian ts, bf->bf_state.bfs_pktlen, 3688227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3689227364Sadrian 3690227364Sadrian ath_tx_default_comp(sc, bf, fail); 3691227364Sadrian} 3692227364Sadrian 3693227364Sadrian/* 3694227364Sadrian * Handle cleanup of aggregate session packets that aren't 3695227364Sadrian * an A-MPDU. 3696227364Sadrian * 3697227364Sadrian * There's no need to update the BAW here - the session is being 3698227364Sadrian * torn down. 3699227364Sadrian */ 3700227364Sadrianstatic void 3701227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3702227364Sadrian{ 3703227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3704227364Sadrian struct ath_node *an = ATH_NODE(ni); 3705227364Sadrian int tid = bf->bf_state.bfs_tid; 3706227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3707227364Sadrian 3708227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 3709227364Sadrian __func__, tid, atid->incomp); 3710227364Sadrian 3711243786Sadrian ATH_TX_LOCK(sc); 3712227364Sadrian atid->incomp--; 3713227364Sadrian if (atid->incomp == 0) { 3714227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3715227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3716227364Sadrian __func__, tid); 3717227364Sadrian atid->cleanup_inprogress = 0; 3718227364Sadrian ath_tx_tid_resume(sc, atid); 3719227364Sadrian } 3720243786Sadrian ATH_TX_UNLOCK(sc); 3721227364Sadrian 3722227364Sadrian ath_tx_default_comp(sc, bf, 0); 3723227364Sadrian} 3724227364Sadrian 3725227364Sadrian/* 3726227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 3727227364Sadrian * unaggregated. 3728227364Sadrian * 3729227364Sadrian * - Discard all retry frames from the s/w queue. 3730227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 3731227364Sadrian * - Count the number of unacked frames, and let transmit completion 3732227364Sadrian * handle it later. 3733227364Sadrian * 3734227364Sadrian * The caller is responsible for pausing the TID. 3735227364Sadrian */ 3736227364Sadrianstatic void 3737235749Sadrianath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 3738227364Sadrian{ 3739227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3740227364Sadrian struct ieee80211_tx_ampdu *tap; 3741227364Sadrian struct ath_buf *bf, *bf_next; 3742227364Sadrian ath_bufhead bf_cq; 3743227364Sadrian 3744235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 3745227364Sadrian "%s: TID %d: called\n", __func__, tid); 3746227364Sadrian 3747227364Sadrian TAILQ_INIT(&bf_cq); 3748243786Sadrian ATH_TX_LOCK(sc); 3749227364Sadrian 3750227364Sadrian /* 3751240639Sadrian * Move the filtered frames to the TX queue, before 3752240639Sadrian * we run off and discard/process things. 3753240639Sadrian */ 3754240639Sadrian /* XXX this is really quite inefficient */ 3755241566Sadrian while ((bf = ATH_TID_FILT_LAST(atid, ath_bufhead_s)) != NULL) { 3756241566Sadrian ATH_TID_FILT_REMOVE(atid, bf, bf_list); 3757241336Sadrian ATH_TID_INSERT_HEAD(atid, bf, bf_list); 3758240639Sadrian } 3759240639Sadrian 3760240639Sadrian /* 3761227364Sadrian * Update the frames in the software TX queue: 3762227364Sadrian * 3763227364Sadrian * + Discard retry frames in the queue 3764227364Sadrian * + Fix the completion function to be non-aggregate 3765227364Sadrian */ 3766241336Sadrian bf = ATH_TID_FIRST(atid); 3767227364Sadrian while (bf) { 3768227364Sadrian if (bf->bf_state.bfs_isretried) { 3769227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 3770241336Sadrian ATH_TID_REMOVE(atid, bf, bf_list); 3771227364Sadrian if (bf->bf_state.bfs_dobaw) { 3772227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3773227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3774227364Sadrian device_printf(sc->sc_dev, 3775227364Sadrian "%s: wasn't added: seqno %d\n", 3776229949Sadrian __func__, 3777229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3778227364Sadrian } 3779227364Sadrian bf->bf_state.bfs_dobaw = 0; 3780227364Sadrian /* 3781227364Sadrian * Call the default completion handler with "fail" just 3782227364Sadrian * so upper levels are suitably notified about this. 3783227364Sadrian */ 3784227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3785227364Sadrian bf = bf_next; 3786227364Sadrian continue; 3787227364Sadrian } 3788227364Sadrian /* Give these the default completion handler */ 3789227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3790227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 3791227364Sadrian } 3792227364Sadrian 3793227364Sadrian /* The caller is required to pause the TID */ 3794227364Sadrian#if 0 3795227364Sadrian /* Pause the TID */ 3796227364Sadrian ath_tx_tid_pause(sc, atid); 3797227364Sadrian#endif 3798227364Sadrian 3799227364Sadrian /* 3800227364Sadrian * Calculate what hardware-queued frames exist based 3801227364Sadrian * on the current BAW size. Ie, what frames have been 3802227364Sadrian * added to the TX hardware queue for this TID but 3803227364Sadrian * not yet ACKed. 3804227364Sadrian */ 3805227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3806227364Sadrian /* Need the lock - fiddling with BAW */ 3807227364Sadrian while (atid->baw_head != atid->baw_tail) { 3808227364Sadrian if (atid->tx_buf[atid->baw_head]) { 3809227364Sadrian atid->incomp++; 3810227364Sadrian atid->cleanup_inprogress = 1; 3811227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 3812227364Sadrian } 3813227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 3814227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 3815227364Sadrian } 3816227364Sadrian 3817227364Sadrian /* 3818227364Sadrian * If cleanup is required, defer TID scheduling 3819227364Sadrian * until all the HW queued packets have been 3820227364Sadrian * sent. 3821227364Sadrian */ 3822227364Sadrian if (! atid->cleanup_inprogress) 3823227364Sadrian ath_tx_tid_resume(sc, atid); 3824227364Sadrian 3825227364Sadrian if (atid->cleanup_inprogress) 3826227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3827227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 3828227364Sadrian __func__, tid, atid->incomp); 3829243786Sadrian ATH_TX_UNLOCK(sc); 3830227364Sadrian 3831227364Sadrian /* Handle completing frames and fail them */ 3832227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3833227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3834227364Sadrian ath_tx_default_comp(sc, bf, 1); 3835227364Sadrian } 3836227364Sadrian} 3837227364Sadrian 3838227364Sadrianstatic struct ath_buf * 3839227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3840227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3841227364Sadrian{ 3842227364Sadrian struct ath_buf *nbf; 3843227364Sadrian int error; 3844227364Sadrian 3845248988Sadrian /* 3846248988Sadrian * Clone the buffer. This will handle the dma unmap and 3847248988Sadrian * copy the node reference to the new buffer. If this 3848248988Sadrian * works out, 'bf' will have no DMA mapping, no mbuf 3849248988Sadrian * pointer and no node reference. 3850248988Sadrian */ 3851227364Sadrian nbf = ath_buf_clone(sc, bf); 3852227364Sadrian 3853227364Sadrian#if 0 3854227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3855227364Sadrian __func__); 3856227364Sadrian#endif 3857227364Sadrian 3858227364Sadrian if (nbf == NULL) { 3859227364Sadrian /* Failed to clone */ 3860227364Sadrian device_printf(sc->sc_dev, 3861227364Sadrian "%s: failed to clone a busy buffer\n", 3862227364Sadrian __func__); 3863227364Sadrian return NULL; 3864227364Sadrian } 3865227364Sadrian 3866227364Sadrian /* Setup the dma for the new buffer */ 3867227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3868227364Sadrian if (error != 0) { 3869227364Sadrian device_printf(sc->sc_dev, 3870227364Sadrian "%s: failed to setup dma for clone\n", 3871227364Sadrian __func__); 3872227364Sadrian /* 3873227364Sadrian * Put this at the head of the list, not tail; 3874227364Sadrian * that way it doesn't interfere with the 3875227364Sadrian * busy buffer logic (which uses the tail of 3876227364Sadrian * the list.) 3877227364Sadrian */ 3878227364Sadrian ATH_TXBUF_LOCK(sc); 3879236994Sadrian ath_returnbuf_head(sc, nbf); 3880227364Sadrian ATH_TXBUF_UNLOCK(sc); 3881227364Sadrian return NULL; 3882227364Sadrian } 3883227364Sadrian 3884227398Sadrian /* Update BAW if required, before we free the original buf */ 3885227398Sadrian if (bf->bf_state.bfs_dobaw) 3886227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3887227398Sadrian 3888248988Sadrian /* Free original buffer; return new buffer */ 3889227364Sadrian ath_freebuf(sc, bf); 3890240639Sadrian 3891227364Sadrian return nbf; 3892227364Sadrian} 3893227364Sadrian 3894227364Sadrian/* 3895227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3896227364Sadrian * session. 3897227364Sadrian * 3898227364Sadrian * If too many retries occur, pause the TID, wait for 3899227364Sadrian * any further retransmits (as there's no reason why 3900227364Sadrian * non-aggregate frames in an aggregate session are 3901227364Sadrian * transmitted in-order; they just have to be in-BAW) 3902227364Sadrian * and then queue a BAR. 3903227364Sadrian */ 3904227364Sadrianstatic void 3905227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3906227364Sadrian{ 3907227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3908227364Sadrian struct ath_node *an = ATH_NODE(ni); 3909227364Sadrian int tid = bf->bf_state.bfs_tid; 3910227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3911227364Sadrian struct ieee80211_tx_ampdu *tap; 3912227364Sadrian 3913243786Sadrian ATH_TX_LOCK(sc); 3914227364Sadrian 3915227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3916227364Sadrian 3917227364Sadrian /* 3918227364Sadrian * If the buffer is marked as busy, we can't directly 3919227364Sadrian * reuse it. Instead, try to clone the buffer. 3920227364Sadrian * If the clone is successful, recycle the old buffer. 3921227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3922227364Sadrian * to force the next bit of code to free the buffer 3923227364Sadrian * for us. 3924227364Sadrian */ 3925227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3926227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3927227364Sadrian struct ath_buf *nbf; 3928227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3929227364Sadrian if (nbf) 3930227364Sadrian /* bf has been freed at this point */ 3931227364Sadrian bf = nbf; 3932227364Sadrian else 3933227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3934227364Sadrian } 3935227364Sadrian 3936227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3937227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3938227364Sadrian "%s: exceeded retries; seqno %d\n", 3939227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3940227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3941227364Sadrian 3942227364Sadrian /* Update BAW anyway */ 3943227364Sadrian if (bf->bf_state.bfs_dobaw) { 3944227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3945227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3946227364Sadrian device_printf(sc->sc_dev, 3947227364Sadrian "%s: wasn't added: seqno %d\n", 3948227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3949227364Sadrian } 3950227364Sadrian bf->bf_state.bfs_dobaw = 0; 3951227364Sadrian 3952233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3953233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3954227364Sadrian 3955233908Sadrian /* Send the BAR if there are no other frames waiting */ 3956233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3957233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3958227364Sadrian 3959243786Sadrian ATH_TX_UNLOCK(sc); 3960227364Sadrian 3961227364Sadrian /* Free buffer, bf is free after this call */ 3962227364Sadrian ath_tx_default_comp(sc, bf, 0); 3963227364Sadrian return; 3964227364Sadrian } 3965227364Sadrian 3966227364Sadrian /* 3967227364Sadrian * This increments the retry counter as well as 3968227364Sadrian * sets the retry flag in the ath_buf and packet 3969227364Sadrian * body. 3970227364Sadrian */ 3971227364Sadrian ath_tx_set_retry(sc, bf); 3972240639Sadrian sc->sc_stats.ast_tx_swretries++; 3973227364Sadrian 3974227364Sadrian /* 3975227364Sadrian * Insert this at the head of the queue, so it's 3976227364Sadrian * retried before any current/subsequent frames. 3977227364Sadrian */ 3978241336Sadrian ATH_TID_INSERT_HEAD(atid, bf, bf_list); 3979227364Sadrian ath_tx_tid_sched(sc, atid); 3980233908Sadrian /* Send the BAR if there are no other frames waiting */ 3981233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3982233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3983227364Sadrian 3984243786Sadrian ATH_TX_UNLOCK(sc); 3985227364Sadrian} 3986227364Sadrian 3987227364Sadrian/* 3988227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3989227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3990227364Sadrian * buffers. 3991227364Sadrian * 3992227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3993227364Sadrian */ 3994227364Sadrianstatic int 3995227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3996227364Sadrian ath_bufhead *bf_q) 3997227364Sadrian{ 3998227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3999227364Sadrian struct ath_node *an = ATH_NODE(ni); 4000227364Sadrian int tid = bf->bf_state.bfs_tid; 4001227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4002227364Sadrian 4003243786Sadrian ATH_TX_LOCK_ASSERT(sc); 4004227364Sadrian 4005240255Sadrian /* XXX clr11naggr should be done for all subframes */ 4006227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4007227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 4008240639Sadrian 4009227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 4010227364Sadrian 4011227364Sadrian /* 4012227364Sadrian * If the buffer is marked as busy, we can't directly 4013227364Sadrian * reuse it. Instead, try to clone the buffer. 4014227364Sadrian * If the clone is successful, recycle the old buffer. 4015227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 4016227364Sadrian * to force the next bit of code to free the buffer 4017227364Sadrian * for us. 4018227364Sadrian */ 4019227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 4020227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 4021227364Sadrian struct ath_buf *nbf; 4022227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 4023227364Sadrian if (nbf) 4024227364Sadrian /* bf has been freed at this point */ 4025227364Sadrian bf = nbf; 4026227364Sadrian else 4027227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 4028227364Sadrian } 4029227364Sadrian 4030227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 4031227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 4032227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 4033227364Sadrian "%s: max retries: seqno %d\n", 4034227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4035227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 4036227364Sadrian if (! bf->bf_state.bfs_addedbaw) 4037227364Sadrian device_printf(sc->sc_dev, 4038227364Sadrian "%s: wasn't added: seqno %d\n", 4039227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4040227364Sadrian bf->bf_state.bfs_dobaw = 0; 4041227364Sadrian return 1; 4042227364Sadrian } 4043227364Sadrian 4044227364Sadrian ath_tx_set_retry(sc, bf); 4045240639Sadrian sc->sc_stats.ast_tx_swretries++; 4046227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 4047227364Sadrian 4048240255Sadrian /* Clear the aggregate state */ 4049240255Sadrian bf->bf_state.bfs_aggr = 0; 4050240255Sadrian bf->bf_state.bfs_ndelim = 0; /* ??? needed? */ 4051240255Sadrian bf->bf_state.bfs_nframes = 1; 4052240255Sadrian 4053227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 4054227364Sadrian return 0; 4055227364Sadrian} 4056227364Sadrian 4057227364Sadrian/* 4058227364Sadrian * error pkt completion for an aggregate destination 4059227364Sadrian */ 4060227364Sadrianstatic void 4061227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 4062227364Sadrian struct ath_tid *tid) 4063227364Sadrian{ 4064227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 4065227364Sadrian struct ath_node *an = ATH_NODE(ni); 4066227364Sadrian struct ath_buf *bf_next, *bf; 4067227364Sadrian ath_bufhead bf_q; 4068227364Sadrian int drops = 0; 4069227364Sadrian struct ieee80211_tx_ampdu *tap; 4070227364Sadrian ath_bufhead bf_cq; 4071227364Sadrian 4072227364Sadrian TAILQ_INIT(&bf_q); 4073227364Sadrian TAILQ_INIT(&bf_cq); 4074227364Sadrian 4075227364Sadrian /* 4076227364Sadrian * Update rate control - all frames have failed. 4077227364Sadrian * 4078227364Sadrian * XXX use the length in the first frame in the series; 4079227364Sadrian * XXX just so things are consistent for now. 4080227364Sadrian */ 4081227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 4082227364Sadrian &bf_first->bf_status.ds_txstat, 4083227364Sadrian bf_first->bf_state.bfs_pktlen, 4084227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 4085227364Sadrian 4086243786Sadrian ATH_TX_LOCK(sc); 4087227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 4088227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 4089227364Sadrian 4090227364Sadrian /* Retry all subframes */ 4091227364Sadrian bf = bf_first; 4092227364Sadrian while (bf) { 4093227364Sadrian bf_next = bf->bf_next; 4094227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 4095227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 4096227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 4097227364Sadrian drops++; 4098227364Sadrian bf->bf_next = NULL; 4099227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 4100227364Sadrian } 4101227364Sadrian bf = bf_next; 4102227364Sadrian } 4103227364Sadrian 4104227364Sadrian /* Prepend all frames to the beginning of the queue */ 4105227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 4106227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 4107241336Sadrian ATH_TID_INSERT_HEAD(tid, bf, bf_list); 4108227364Sadrian } 4109227364Sadrian 4110234725Sadrian /* 4111234725Sadrian * Schedule the TID to be re-tried. 4112234725Sadrian */ 4113227364Sadrian ath_tx_tid_sched(sc, tid); 4114227364Sadrian 4115227364Sadrian /* 4116227364Sadrian * send bar if we dropped any frames 4117227364Sadrian * 4118227364Sadrian * Keep the txq lock held for now, as we need to ensure 4119227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 4120227364Sadrian * in the ifnet TX context or raw TX context.) 4121227364Sadrian */ 4122227364Sadrian if (drops) { 4123233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 4124233908Sadrian ath_tx_tid_bar_suspend(sc, tid); 4125227364Sadrian } 4126227364Sadrian 4127233908Sadrian /* 4128233908Sadrian * Send BAR if required 4129233908Sadrian */ 4130233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, tid)) 4131233908Sadrian ath_tx_tid_bar_tx(sc, tid); 4132240639Sadrian 4133243786Sadrian ATH_TX_UNLOCK(sc); 4134233908Sadrian 4135227364Sadrian /* Complete frames which errored out */ 4136227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 4137227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 4138227364Sadrian ath_tx_default_comp(sc, bf, 0); 4139227364Sadrian } 4140227364Sadrian} 4141227364Sadrian 4142227364Sadrian/* 4143227364Sadrian * Handle clean-up of packets from an aggregate list. 4144227364Sadrian * 4145227364Sadrian * There's no need to update the BAW here - the session is being 4146227364Sadrian * torn down. 4147227364Sadrian */ 4148227364Sadrianstatic void 4149227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 4150227364Sadrian{ 4151227364Sadrian struct ath_buf *bf, *bf_next; 4152227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 4153227364Sadrian struct ath_node *an = ATH_NODE(ni); 4154227364Sadrian int tid = bf_first->bf_state.bfs_tid; 4155227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4156227364Sadrian 4157243786Sadrian ATH_TX_LOCK(sc); 4158227364Sadrian 4159227364Sadrian /* update incomp */ 4160248341Sadrian bf = bf_first; 4161227364Sadrian while (bf) { 4162227364Sadrian atid->incomp--; 4163227364Sadrian bf = bf->bf_next; 4164227364Sadrian } 4165227364Sadrian 4166227364Sadrian if (atid->incomp == 0) { 4167227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4168227364Sadrian "%s: TID %d: cleaned up! resume!\n", 4169227364Sadrian __func__, tid); 4170227364Sadrian atid->cleanup_inprogress = 0; 4171227364Sadrian ath_tx_tid_resume(sc, atid); 4172227364Sadrian } 4173233908Sadrian 4174233908Sadrian /* Send BAR if required */ 4175240639Sadrian /* XXX why would we send a BAR when transitioning to non-aggregation? */ 4176248341Sadrian /* 4177248341Sadrian * XXX TODO: we should likely just tear down the BAR state here, 4178248341Sadrian * rather than sending a BAR. 4179248341Sadrian */ 4180233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4181233908Sadrian ath_tx_tid_bar_tx(sc, atid); 4182240639Sadrian 4183243786Sadrian ATH_TX_UNLOCK(sc); 4184227364Sadrian 4185227364Sadrian /* Handle frame completion */ 4186248341Sadrian bf = bf_first; 4187227364Sadrian while (bf) { 4188227364Sadrian bf_next = bf->bf_next; 4189227364Sadrian ath_tx_default_comp(sc, bf, 1); 4190227364Sadrian bf = bf_next; 4191227364Sadrian } 4192227364Sadrian} 4193227364Sadrian 4194227364Sadrian/* 4195227364Sadrian * Handle completion of an set of aggregate frames. 4196227364Sadrian * 4197227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 4198227364Sadrian * not the last descriptor in the first frame. 4199227364Sadrian */ 4200227364Sadrianstatic void 4201229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 4202229949Sadrian int fail) 4203227364Sadrian{ 4204227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 4205227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 4206227364Sadrian struct ath_node *an = ATH_NODE(ni); 4207227364Sadrian int tid = bf_first->bf_state.bfs_tid; 4208227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4209227364Sadrian struct ath_tx_status ts; 4210227364Sadrian struct ieee80211_tx_ampdu *tap; 4211227364Sadrian ath_bufhead bf_q; 4212227364Sadrian ath_bufhead bf_cq; 4213227364Sadrian int seq_st, tx_ok; 4214227364Sadrian int hasba, isaggr; 4215227364Sadrian uint32_t ba[2]; 4216227364Sadrian struct ath_buf *bf, *bf_next; 4217227364Sadrian int ba_index; 4218227364Sadrian int drops = 0; 4219227364Sadrian int nframes = 0, nbad = 0, nf; 4220227364Sadrian int pktlen; 4221227364Sadrian /* XXX there's too much on the stack? */ 4222236038Sadrian struct ath_rc_series rc[ATH_RC_NUM]; 4223227364Sadrian int txseq; 4224227364Sadrian 4225227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 4226227364Sadrian __func__, atid->hwq_depth); 4227227364Sadrian 4228240677Sadrian /* 4229240677Sadrian * Take a copy; this may be needed -after- bf_first 4230240677Sadrian * has been completed and freed. 4231240677Sadrian */ 4232240677Sadrian ts = bf_first->bf_status.ds_txstat; 4233240677Sadrian 4234240639Sadrian TAILQ_INIT(&bf_q); 4235240639Sadrian TAILQ_INIT(&bf_cq); 4236240639Sadrian 4237227364Sadrian /* The TID state is kept behind the TXQ lock */ 4238243786Sadrian ATH_TX_LOCK(sc); 4239227364Sadrian 4240227364Sadrian atid->hwq_depth--; 4241227364Sadrian if (atid->hwq_depth < 0) 4242227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 4243227364Sadrian __func__, atid->hwq_depth); 4244227364Sadrian 4245227364Sadrian /* 4246240639Sadrian * If the TID is filtered, handle completing the filter 4247240639Sadrian * transition before potentially kicking it to the cleanup 4248240639Sadrian * function. 4249240677Sadrian * 4250240677Sadrian * XXX this is duplicate work, ew. 4251240639Sadrian */ 4252240639Sadrian if (atid->isfiltered) 4253240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4254240639Sadrian 4255240639Sadrian /* 4256227364Sadrian * Punt cleanup to the relevant function, not our problem now 4257227364Sadrian */ 4258227364Sadrian if (atid->cleanup_inprogress) { 4259240639Sadrian if (atid->isfiltered) 4260240639Sadrian device_printf(sc->sc_dev, 4261240639Sadrian "%s: isfiltered=1, normal_comp?\n", 4262240639Sadrian __func__); 4263243786Sadrian ATH_TX_UNLOCK(sc); 4264227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 4265227364Sadrian return; 4266227364Sadrian } 4267227364Sadrian 4268227364Sadrian /* 4269240639Sadrian * If the frame is filtered, transition to filtered frame 4270240639Sadrian * mode and add this to the filtered frame list. 4271240639Sadrian * 4272240639Sadrian * XXX TODO: figure out how this interoperates with 4273240639Sadrian * BAR, pause and cleanup states. 4274240639Sadrian */ 4275240639Sadrian if ((ts.ts_status & HAL_TXERR_FILT) || 4276240639Sadrian (ts.ts_status != 0 && atid->isfiltered)) { 4277240639Sadrian if (fail != 0) 4278240639Sadrian device_printf(sc->sc_dev, 4279240639Sadrian "%s: isfiltered=1, fail=%d\n", __func__, fail); 4280240639Sadrian ath_tx_tid_filt_comp_aggr(sc, atid, bf_first, &bf_cq); 4281240639Sadrian 4282240639Sadrian /* Remove from BAW */ 4283240639Sadrian TAILQ_FOREACH_SAFE(bf, &bf_cq, bf_list, bf_next) { 4284240639Sadrian if (bf->bf_state.bfs_addedbaw) 4285240639Sadrian drops++; 4286240639Sadrian if (bf->bf_state.bfs_dobaw) { 4287240639Sadrian ath_tx_update_baw(sc, an, atid, bf); 4288240639Sadrian if (! bf->bf_state.bfs_addedbaw) 4289240639Sadrian device_printf(sc->sc_dev, 4290240639Sadrian "%s: wasn't added: seqno %d\n", 4291240639Sadrian __func__, 4292240639Sadrian SEQNO(bf->bf_state.bfs_seqno)); 4293240639Sadrian } 4294240639Sadrian bf->bf_state.bfs_dobaw = 0; 4295240639Sadrian } 4296240639Sadrian /* 4297240639Sadrian * If any intermediate frames in the BAW were dropped when 4298240639Sadrian * handling filtering things, send a BAR. 4299240639Sadrian */ 4300240639Sadrian if (drops) 4301240639Sadrian ath_tx_tid_bar_suspend(sc, atid); 4302240639Sadrian 4303240639Sadrian /* 4304240639Sadrian * Finish up by sending a BAR if required and freeing 4305240639Sadrian * the frames outside of the TX lock. 4306240639Sadrian */ 4307240639Sadrian goto finish_send_bar; 4308240639Sadrian } 4309240639Sadrian 4310240639Sadrian /* 4311227364Sadrian * XXX for now, use the first frame in the aggregate for 4312227364Sadrian * XXX rate control completion; it's at least consistent. 4313227364Sadrian */ 4314227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 4315227364Sadrian 4316227364Sadrian /* 4317235461Sadrian * Handle errors first! 4318235461Sadrian * 4319235461Sadrian * Here, handle _any_ error as a "exceeded retries" error. 4320235461Sadrian * Later on (when filtered frames are to be specially handled) 4321235461Sadrian * it'll have to be expanded. 4322227364Sadrian */ 4323235461Sadrian#if 0 4324227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 4325235461Sadrian#endif 4326235461Sadrian if (ts.ts_status != 0) { 4327243786Sadrian ATH_TX_UNLOCK(sc); 4328227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 4329227364Sadrian return; 4330227364Sadrian } 4331227364Sadrian 4332227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4333227364Sadrian 4334227364Sadrian /* 4335227364Sadrian * extract starting sequence and block-ack bitmap 4336227364Sadrian */ 4337227364Sadrian /* XXX endian-ness of seq_st, ba? */ 4338227364Sadrian seq_st = ts.ts_seqnum; 4339227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 4340227364Sadrian tx_ok = (ts.ts_status == 0); 4341227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 4342227364Sadrian ba[0] = ts.ts_ba_low; 4343227364Sadrian ba[1] = ts.ts_ba_high; 4344227364Sadrian 4345227364Sadrian /* 4346227364Sadrian * Copy the TX completion status and the rate control 4347227364Sadrian * series from the first descriptor, as it may be freed 4348227364Sadrian * before the rate control code can get its grubby fingers 4349227364Sadrian * into things. 4350227364Sadrian */ 4351227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 4352227364Sadrian 4353227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4354229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 4355229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 4356227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 4357227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 4358227364Sadrian 4359248091Sadrian /* 4360248091Sadrian * The reference driver doesn't do this; it simply ignores 4361248091Sadrian * this check in its entirety. 4362248091Sadrian * 4363248091Sadrian * I've seen this occur when using iperf to send traffic 4364248091Sadrian * out tid 1 - the aggregate frames are all marked as TID 1, 4365248091Sadrian * but the TXSTATUS has TID=0. So, let's just ignore this 4366248091Sadrian * check. 4367248091Sadrian */ 4368248091Sadrian#if 0 4369227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 4370227364Sadrian if (tid != ts.ts_tid) { 4371227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 4372227364Sadrian __func__, tid, ts.ts_tid); 4373227364Sadrian tx_ok = 0; 4374227364Sadrian } 4375248091Sadrian#endif 4376227364Sadrian 4377227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 4378227364Sadrian if (isaggr && tx_ok && (! hasba)) { 4379227364Sadrian device_printf(sc->sc_dev, 4380229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 4381229949Sadrian "seq_st=%d\n", 4382227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 4383227364Sadrian /* XXX TODO: schedule an interface reset */ 4384238350Sjhb#ifdef ATH_DEBUG 4385238338Sadrian ath_printtxbuf(sc, bf_first, 4386238338Sadrian sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0); 4387238350Sjhb#endif 4388227364Sadrian } 4389227364Sadrian 4390227364Sadrian /* 4391227364Sadrian * Walk the list of frames, figure out which ones were correctly 4392227364Sadrian * sent and which weren't. 4393227364Sadrian */ 4394227364Sadrian bf = bf_first; 4395227364Sadrian nf = bf_first->bf_state.bfs_nframes; 4396227364Sadrian 4397227364Sadrian /* bf_first is going to be invalid once this list is walked */ 4398227364Sadrian bf_first = NULL; 4399227364Sadrian 4400227364Sadrian /* 4401227364Sadrian * Walk the list of completed frames and determine 4402227364Sadrian * which need to be completed and which need to be 4403227364Sadrian * retransmitted. 4404227364Sadrian * 4405227364Sadrian * For completed frames, the completion functions need 4406227364Sadrian * to be called at the end of this function as the last 4407227364Sadrian * node reference may free the node. 4408227364Sadrian * 4409227364Sadrian * Finally, since the TXQ lock can't be held during the 4410227364Sadrian * completion callback (to avoid lock recursion), 4411227364Sadrian * the completion calls have to be done outside of the 4412227364Sadrian * lock. 4413227364Sadrian */ 4414227364Sadrian while (bf) { 4415227364Sadrian nframes++; 4416229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 4417229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 4418227364Sadrian bf_next = bf->bf_next; 4419227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 4420227364Sadrian 4421227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4422227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 4423227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 4424227364Sadrian ATH_BA_ISSET(ba, ba_index)); 4425227364Sadrian 4426227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 4427227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 4428227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 4429227364Sadrian bf->bf_state.bfs_dobaw = 0; 4430227364Sadrian if (! bf->bf_state.bfs_addedbaw) 4431227364Sadrian device_printf(sc->sc_dev, 4432227364Sadrian "%s: wasn't added: seqno %d\n", 4433227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4434227364Sadrian bf->bf_next = NULL; 4435227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 4436227364Sadrian } else { 4437227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 4438227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 4439227364Sadrian drops++; 4440227364Sadrian bf->bf_next = NULL; 4441227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 4442227364Sadrian } 4443227364Sadrian nbad++; 4444227364Sadrian } 4445227364Sadrian bf = bf_next; 4446227364Sadrian } 4447227364Sadrian 4448227364Sadrian /* 4449227364Sadrian * Now that the BAW updates have been done, unlock 4450227364Sadrian * 4451227364Sadrian * txseq is grabbed before the lock is released so we 4452227364Sadrian * have a consistent view of what -was- in the BAW. 4453227364Sadrian * Anything after this point will not yet have been 4454227364Sadrian * TXed. 4455227364Sadrian */ 4456227364Sadrian txseq = tap->txa_start; 4457243786Sadrian ATH_TX_UNLOCK(sc); 4458227364Sadrian 4459227364Sadrian if (nframes != nf) 4460227364Sadrian device_printf(sc->sc_dev, 4461227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 4462227364Sadrian __func__, nframes, nf); 4463227364Sadrian 4464227364Sadrian /* 4465227364Sadrian * Now we know how many frames were bad, call the rate 4466227364Sadrian * control code. 4467227364Sadrian */ 4468227364Sadrian if (fail == 0) 4469229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 4470229949Sadrian nbad); 4471227364Sadrian 4472227364Sadrian /* 4473227364Sadrian * send bar if we dropped any frames 4474227364Sadrian */ 4475227364Sadrian if (drops) { 4476233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 4477243786Sadrian ATH_TX_LOCK(sc); 4478233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 4479243786Sadrian ATH_TX_UNLOCK(sc); 4480227364Sadrian } 4481227364Sadrian 4482234725Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4483234725Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 4484234725Sadrian 4485243786Sadrian ATH_TX_LOCK(sc); 4486234725Sadrian 4487227364Sadrian /* Prepend all frames to the beginning of the queue */ 4488227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 4489227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 4490241336Sadrian ATH_TID_INSERT_HEAD(atid, bf, bf_list); 4491227364Sadrian } 4492234725Sadrian 4493234725Sadrian /* 4494234725Sadrian * Reschedule to grab some further frames. 4495234725Sadrian */ 4496227364Sadrian ath_tx_tid_sched(sc, atid); 4497227364Sadrian 4498233908Sadrian /* 4499240639Sadrian * If the queue is filtered, re-schedule as required. 4500240639Sadrian * 4501240639Sadrian * This is required as there may be a subsequent TX descriptor 4502240639Sadrian * for this end-node that has CLRDMASK set, so it's quite possible 4503240639Sadrian * that a filtered frame will be followed by a non-filtered 4504240639Sadrian * (complete or otherwise) frame. 4505240639Sadrian * 4506240639Sadrian * XXX should we do this before we complete the frame? 4507240639Sadrian */ 4508240639Sadrian if (atid->isfiltered) 4509240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4510240639Sadrian 4511240639Sadrianfinish_send_bar: 4512240639Sadrian 4513240639Sadrian /* 4514233908Sadrian * Send BAR if required 4515233908Sadrian */ 4516233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4517233908Sadrian ath_tx_tid_bar_tx(sc, atid); 4518234725Sadrian 4519243786Sadrian ATH_TX_UNLOCK(sc); 4520233908Sadrian 4521227364Sadrian /* Do deferred completion */ 4522227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 4523227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 4524227364Sadrian ath_tx_default_comp(sc, bf, 0); 4525227364Sadrian } 4526227364Sadrian} 4527227364Sadrian 4528227364Sadrian/* 4529227364Sadrian * Handle completion of unaggregated frames in an ADDBA 4530227364Sadrian * session. 4531227364Sadrian * 4532227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 4533227364Sadrian * ath_tx_draintxq(). 4534227364Sadrian */ 4535227364Sadrianstatic void 4536227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 4537227364Sadrian{ 4538227364Sadrian struct ieee80211_node *ni = bf->bf_node; 4539227364Sadrian struct ath_node *an = ATH_NODE(ni); 4540227364Sadrian int tid = bf->bf_state.bfs_tid; 4541227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4542240677Sadrian struct ath_tx_status ts; 4543240639Sadrian int drops = 0; 4544227364Sadrian 4545227364Sadrian /* 4546240677Sadrian * Take a copy of this; filtering/cloning the frame may free the 4547240677Sadrian * bf pointer. 4548240677Sadrian */ 4549240677Sadrian ts = bf->bf_status.ds_txstat; 4550240677Sadrian 4551240677Sadrian /* 4552227364Sadrian * Update rate control status here, before we possibly 4553227364Sadrian * punt to retry or cleanup. 4554227364Sadrian * 4555227364Sadrian * Do it outside of the TXQ lock. 4556227364Sadrian */ 4557233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 4558227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 4559227364Sadrian &bf->bf_status.ds_txstat, 4560227364Sadrian bf->bf_state.bfs_pktlen, 4561240677Sadrian 1, (ts.ts_status == 0) ? 0 : 1); 4562227364Sadrian 4563227364Sadrian /* 4564227364Sadrian * This is called early so atid->hwq_depth can be tracked. 4565227364Sadrian * This unfortunately means that it's released and regrabbed 4566227364Sadrian * during retry and cleanup. That's rather inefficient. 4567227364Sadrian */ 4568243786Sadrian ATH_TX_LOCK(sc); 4569227364Sadrian 4570227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4571227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 4572227364Sadrian 4573229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 4574229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 4575229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 4576229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 4577227364Sadrian 4578227364Sadrian atid->hwq_depth--; 4579227364Sadrian if (atid->hwq_depth < 0) 4580227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 4581227364Sadrian __func__, atid->hwq_depth); 4582227364Sadrian 4583227364Sadrian /* 4584240639Sadrian * If the TID is filtered, handle completing the filter 4585240639Sadrian * transition before potentially kicking it to the cleanup 4586240639Sadrian * function. 4587240639Sadrian */ 4588240639Sadrian if (atid->isfiltered) 4589240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4590240639Sadrian 4591240639Sadrian /* 4592227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 4593227364Sadrian * rather than handling it here. It's thus their 4594227364Sadrian * responsibility to clean up, call the completion 4595227364Sadrian * function in net80211, etc. 4596227364Sadrian */ 4597227364Sadrian if (atid->cleanup_inprogress) { 4598240639Sadrian if (atid->isfiltered) 4599240639Sadrian device_printf(sc->sc_dev, 4600240639Sadrian "%s: isfiltered=1, normal_comp?\n", 4601240639Sadrian __func__); 4602243786Sadrian ATH_TX_UNLOCK(sc); 4603229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 4604229949Sadrian __func__); 4605227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 4606227364Sadrian return; 4607227364Sadrian } 4608227364Sadrian 4609227364Sadrian /* 4610240639Sadrian * XXX TODO: how does cleanup, BAR and filtered frame handling 4611240639Sadrian * overlap? 4612240639Sadrian * 4613240639Sadrian * If the frame is filtered OR if it's any failure but 4614240639Sadrian * the TID is filtered, the frame must be added to the 4615240639Sadrian * filtered frame list. 4616240639Sadrian * 4617240639Sadrian * However - a busy buffer can't be added to the filtered 4618240639Sadrian * list as it will end up being recycled without having 4619240639Sadrian * been made available for the hardware. 4620240639Sadrian */ 4621240677Sadrian if ((ts.ts_status & HAL_TXERR_FILT) || 4622240677Sadrian (ts.ts_status != 0 && atid->isfiltered)) { 4623240639Sadrian int freeframe; 4624240639Sadrian 4625240639Sadrian if (fail != 0) 4626240639Sadrian device_printf(sc->sc_dev, 4627240639Sadrian "%s: isfiltered=1, fail=%d\n", 4628240639Sadrian __func__, 4629240639Sadrian fail); 4630240639Sadrian freeframe = ath_tx_tid_filt_comp_single(sc, atid, bf); 4631240639Sadrian if (freeframe) { 4632240639Sadrian /* Remove from BAW */ 4633240639Sadrian if (bf->bf_state.bfs_addedbaw) 4634240639Sadrian drops++; 4635240639Sadrian if (bf->bf_state.bfs_dobaw) { 4636240639Sadrian ath_tx_update_baw(sc, an, atid, bf); 4637240639Sadrian if (! bf->bf_state.bfs_addedbaw) 4638240639Sadrian device_printf(sc->sc_dev, 4639240639Sadrian "%s: wasn't added: seqno %d\n", 4640240639Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4641240639Sadrian } 4642240639Sadrian bf->bf_state.bfs_dobaw = 0; 4643240639Sadrian } 4644240639Sadrian 4645240639Sadrian /* 4646240639Sadrian * If the frame couldn't be filtered, treat it as a drop and 4647240639Sadrian * prepare to send a BAR. 4648240639Sadrian */ 4649240639Sadrian if (freeframe && drops) 4650240639Sadrian ath_tx_tid_bar_suspend(sc, atid); 4651240639Sadrian 4652240639Sadrian /* 4653240639Sadrian * Send BAR if required 4654240639Sadrian */ 4655240639Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4656240639Sadrian ath_tx_tid_bar_tx(sc, atid); 4657240639Sadrian 4658243786Sadrian ATH_TX_UNLOCK(sc); 4659240639Sadrian /* 4660240639Sadrian * If freeframe is set, then the frame couldn't be 4661240639Sadrian * cloned and bf is still valid. Just complete/free it. 4662240639Sadrian */ 4663240639Sadrian if (freeframe) 4664240639Sadrian ath_tx_default_comp(sc, bf, fail); 4665240639Sadrian 4666240639Sadrian 4667240639Sadrian return; 4668240639Sadrian } 4669240639Sadrian /* 4670227364Sadrian * Don't bother with the retry check if all frames 4671227364Sadrian * are being failed (eg during queue deletion.) 4672227364Sadrian */ 4673235461Sadrian#if 0 4674227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 4675235461Sadrian#endif 4676240677Sadrian if (fail == 0 && ts.ts_status != 0) { 4677243786Sadrian ATH_TX_UNLOCK(sc); 4678229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 4679229949Sadrian __func__); 4680227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 4681227364Sadrian return; 4682227364Sadrian } 4683227364Sadrian 4684227364Sadrian /* Success? Complete */ 4685227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 4686227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 4687227364Sadrian if (bf->bf_state.bfs_dobaw) { 4688227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 4689227364Sadrian bf->bf_state.bfs_dobaw = 0; 4690227364Sadrian if (! bf->bf_state.bfs_addedbaw) 4691227364Sadrian device_printf(sc->sc_dev, 4692227364Sadrian "%s: wasn't added: seqno %d\n", 4693227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4694227364Sadrian } 4695227364Sadrian 4696233908Sadrian /* 4697240639Sadrian * If the queue is filtered, re-schedule as required. 4698240639Sadrian * 4699240639Sadrian * This is required as there may be a subsequent TX descriptor 4700240639Sadrian * for this end-node that has CLRDMASK set, so it's quite possible 4701240639Sadrian * that a filtered frame will be followed by a non-filtered 4702240639Sadrian * (complete or otherwise) frame. 4703240639Sadrian * 4704240639Sadrian * XXX should we do this before we complete the frame? 4705240639Sadrian */ 4706240639Sadrian if (atid->isfiltered) 4707240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4708240639Sadrian 4709240639Sadrian /* 4710233908Sadrian * Send BAR if required 4711233908Sadrian */ 4712233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4713233908Sadrian ath_tx_tid_bar_tx(sc, atid); 4714233908Sadrian 4715243786Sadrian ATH_TX_UNLOCK(sc); 4716227364Sadrian 4717227364Sadrian ath_tx_default_comp(sc, bf, fail); 4718227364Sadrian /* bf is freed at this point */ 4719227364Sadrian} 4720227364Sadrian 4721227364Sadrianvoid 4722227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 4723227364Sadrian{ 4724227364Sadrian if (bf->bf_state.bfs_aggr) 4725227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 4726227364Sadrian else 4727227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 4728227364Sadrian} 4729227364Sadrian 4730227364Sadrian/* 4731227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4732227364Sadrian * 4733227364Sadrian * This is the aggregate version. 4734227364Sadrian */ 4735227364Sadrianvoid 4736227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 4737227364Sadrian struct ath_tid *tid) 4738227364Sadrian{ 4739227364Sadrian struct ath_buf *bf; 4740227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4741227364Sadrian struct ieee80211_tx_ampdu *tap; 4742227364Sadrian ATH_AGGR_STATUS status; 4743227364Sadrian ath_bufhead bf_q; 4744227364Sadrian 4745227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 4746243786Sadrian ATH_TX_LOCK_ASSERT(sc); 4747227364Sadrian 4748227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 4749227364Sadrian 4750227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 4751227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 4752227364Sadrian __func__); 4753227364Sadrian 4754227364Sadrian for (;;) { 4755227364Sadrian status = ATH_AGGR_DONE; 4756227364Sadrian 4757227364Sadrian /* 4758227364Sadrian * If the upper layer has paused the TID, don't 4759227364Sadrian * queue any further packets. 4760227364Sadrian * 4761227364Sadrian * This can also occur from the completion task because 4762227364Sadrian * of packet loss; but as its serialised with this code, 4763227364Sadrian * it won't "appear" half way through queuing packets. 4764227364Sadrian */ 4765227364Sadrian if (tid->paused) 4766227364Sadrian break; 4767227364Sadrian 4768241336Sadrian bf = ATH_TID_FIRST(tid); 4769227364Sadrian if (bf == NULL) { 4770227364Sadrian break; 4771227364Sadrian } 4772227364Sadrian 4773227364Sadrian /* 4774227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 4775227364Sadrian * data frame), schedule it directly; continue. 4776227364Sadrian */ 4777227364Sadrian if (! bf->bf_state.bfs_dobaw) { 4778229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4779229949Sadrian "%s: non-baw packet\n", 4780227364Sadrian __func__); 4781241336Sadrian ATH_TID_REMOVE(tid, bf, bf_list); 4782240180Sadrian 4783240180Sadrian if (bf->bf_state.bfs_nframes > 1) 4784240180Sadrian device_printf(sc->sc_dev, 4785240180Sadrian "%s: aggr=%d, nframes=%d\n", 4786240180Sadrian __func__, 4787240180Sadrian bf->bf_state.bfs_aggr, 4788240180Sadrian bf->bf_state.bfs_nframes); 4789240180Sadrian 4790240180Sadrian /* 4791240180Sadrian * This shouldn't happen - such frames shouldn't 4792240180Sadrian * ever have been queued as an aggregate in the 4793240180Sadrian * first place. However, make sure the fields 4794240180Sadrian * are correctly setup just to be totally sure. 4795240180Sadrian */ 4796227364Sadrian bf->bf_state.bfs_aggr = 0; 4797240180Sadrian bf->bf_state.bfs_nframes = 1; 4798240180Sadrian 4799240724Sadrian /* Update CLRDMASK just before this frame is queued */ 4800240724Sadrian ath_tx_update_clrdmask(sc, tid, bf); 4801240724Sadrian 4802227364Sadrian ath_tx_do_ratelookup(sc, bf); 4803233989Sadrian ath_tx_calc_duration(sc, bf); 4804233989Sadrian ath_tx_calc_protection(sc, bf); 4805233989Sadrian ath_tx_set_rtscts(sc, bf); 4806227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4807227364Sadrian ath_tx_setds(sc, bf); 4808227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4809227364Sadrian 4810227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 4811227364Sadrian 4812227364Sadrian /* Queue the packet; continue */ 4813227364Sadrian goto queuepkt; 4814227364Sadrian } 4815227364Sadrian 4816227364Sadrian TAILQ_INIT(&bf_q); 4817227364Sadrian 4818227364Sadrian /* 4819227364Sadrian * Do a rate control lookup on the first frame in the 4820227364Sadrian * list. The rate control code needs that to occur 4821227364Sadrian * before it can determine whether to TX. 4822227364Sadrian * It's inaccurate because the rate control code doesn't 4823227364Sadrian * really "do" aggregate lookups, so it only considers 4824227364Sadrian * the size of the first frame. 4825227364Sadrian */ 4826227364Sadrian ath_tx_do_ratelookup(sc, bf); 4827227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 4828227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 4829233989Sadrian 4830233989Sadrian ath_tx_calc_duration(sc, bf); 4831233989Sadrian ath_tx_calc_protection(sc, bf); 4832233989Sadrian 4833233989Sadrian ath_tx_set_rtscts(sc, bf); 4834227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4835227364Sadrian 4836227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 4837227364Sadrian 4838227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4839227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 4840227364Sadrian 4841227364Sadrian /* 4842227364Sadrian * No frames to be picked up - out of BAW 4843227364Sadrian */ 4844227364Sadrian if (TAILQ_EMPTY(&bf_q)) 4845227364Sadrian break; 4846227364Sadrian 4847227364Sadrian /* 4848227364Sadrian * This assumes that the descriptor list in the ath_bufhead 4849227364Sadrian * are already linked together via bf_next pointers. 4850227364Sadrian */ 4851227364Sadrian bf = TAILQ_FIRST(&bf_q); 4852227364Sadrian 4853233989Sadrian if (status == ATH_AGGR_8K_LIMITED) 4854233989Sadrian sc->sc_aggr_stats.aggr_rts_aggr_limited++; 4855233989Sadrian 4856227364Sadrian /* 4857227364Sadrian * If it's the only frame send as non-aggregate 4858227364Sadrian * assume that ath_tx_form_aggr() has checked 4859227364Sadrian * whether it's in the BAW and added it appropriately. 4860227364Sadrian */ 4861227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 4862227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4863227364Sadrian "%s: single-frame aggregate\n", __func__); 4864240724Sadrian 4865240724Sadrian /* Update CLRDMASK just before this frame is queued */ 4866240724Sadrian ath_tx_update_clrdmask(sc, tid, bf); 4867240724Sadrian 4868227364Sadrian bf->bf_state.bfs_aggr = 0; 4869240255Sadrian bf->bf_state.bfs_ndelim = 0; 4870227364Sadrian ath_tx_setds(sc, bf); 4871227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4872227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 4873227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 4874227364Sadrian else 4875227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 4876227364Sadrian } else { 4877227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4878229949Sadrian "%s: multi-frame aggregate: %d frames, " 4879229949Sadrian "length %d\n", 4880227364Sadrian __func__, bf->bf_state.bfs_nframes, 4881227364Sadrian bf->bf_state.bfs_al); 4882227364Sadrian bf->bf_state.bfs_aggr = 1; 4883227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 4884227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 4885227364Sadrian 4886240724Sadrian /* Update CLRDMASK just before this frame is queued */ 4887240724Sadrian ath_tx_update_clrdmask(sc, tid, bf); 4888240724Sadrian 4889227364Sadrian /* 4890233989Sadrian * Calculate the duration/protection as required. 4891233989Sadrian */ 4892233989Sadrian ath_tx_calc_duration(sc, bf); 4893233989Sadrian ath_tx_calc_protection(sc, bf); 4894233989Sadrian 4895233989Sadrian /* 4896227364Sadrian * Update the rate and rtscts information based on the 4897227364Sadrian * rate decision made by the rate control code; 4898227364Sadrian * the first frame in the aggregate needs it. 4899227364Sadrian */ 4900227364Sadrian ath_tx_set_rtscts(sc, bf); 4901227364Sadrian 4902227364Sadrian /* 4903227364Sadrian * Setup the relevant descriptor fields 4904227364Sadrian * for aggregation. The first descriptor 4905227364Sadrian * already points to the rest in the chain. 4906227364Sadrian */ 4907227364Sadrian ath_tx_setds_11n(sc, bf); 4908227364Sadrian 4909227364Sadrian } 4910227364Sadrian queuepkt: 4911227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 4912227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 4913227364Sadrian 4914227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 4915227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 4916227364Sadrian 4917227364Sadrian /* Punt to txq */ 4918227364Sadrian ath_tx_handoff(sc, txq, bf); 4919227364Sadrian 4920227364Sadrian /* Track outstanding buffer count to hardware */ 4921227364Sadrian /* aggregates are "one" buffer */ 4922227364Sadrian tid->hwq_depth++; 4923227364Sadrian 4924227364Sadrian /* 4925227364Sadrian * Break out if ath_tx_form_aggr() indicated 4926227364Sadrian * there can't be any further progress (eg BAW is full.) 4927227364Sadrian * Checking for an empty txq is done above. 4928227364Sadrian * 4929227364Sadrian * XXX locking on txq here? 4930227364Sadrian */ 4931227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 4932227364Sadrian status == ATH_AGGR_BAW_CLOSED) 4933227364Sadrian break; 4934227364Sadrian } 4935227364Sadrian} 4936227364Sadrian 4937227364Sadrian/* 4938227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4939227364Sadrian */ 4940227364Sadrianvoid 4941227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 4942227364Sadrian struct ath_tid *tid) 4943227364Sadrian{ 4944227364Sadrian struct ath_buf *bf; 4945227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4946227364Sadrian 4947227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 4948227364Sadrian __func__, an, tid->tid); 4949227364Sadrian 4950243786Sadrian ATH_TX_LOCK_ASSERT(sc); 4951227364Sadrian 4952227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 4953227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 4954227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 4955227364Sadrian __func__, tid->tid); 4956227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 4957227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 4958227364Sadrian __func__, tid->tid); 4959227364Sadrian 4960227364Sadrian for (;;) { 4961227364Sadrian 4962227364Sadrian /* 4963227364Sadrian * If the upper layers have paused the TID, don't 4964227364Sadrian * queue any further packets. 4965227364Sadrian */ 4966227364Sadrian if (tid->paused) 4967227364Sadrian break; 4968227364Sadrian 4969241336Sadrian bf = ATH_TID_FIRST(tid); 4970227364Sadrian if (bf == NULL) { 4971227364Sadrian break; 4972227364Sadrian } 4973227364Sadrian 4974241336Sadrian ATH_TID_REMOVE(tid, bf, bf_list); 4975227364Sadrian 4976227364Sadrian /* Sanity check! */ 4977227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 4978227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 4979227364Sadrian " tid %d\n", 4980227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 4981227364Sadrian } 4982227364Sadrian /* Normal completion handler */ 4983227364Sadrian bf->bf_comp = ath_tx_normal_comp; 4984227364Sadrian 4985240883Sadrian /* 4986240883Sadrian * Override this for now, until the non-aggregate 4987240883Sadrian * completion handler correctly handles software retransmits. 4988240883Sadrian */ 4989240883Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 4990240883Sadrian 4991240724Sadrian /* Update CLRDMASK just before this frame is queued */ 4992240724Sadrian ath_tx_update_clrdmask(sc, tid, bf); 4993240724Sadrian 4994227364Sadrian /* Program descriptors + rate control */ 4995227364Sadrian ath_tx_do_ratelookup(sc, bf); 4996233989Sadrian ath_tx_calc_duration(sc, bf); 4997233989Sadrian ath_tx_calc_protection(sc, bf); 4998233989Sadrian ath_tx_set_rtscts(sc, bf); 4999227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 5000227364Sadrian ath_tx_setds(sc, bf); 5001227364Sadrian 5002227364Sadrian /* Track outstanding buffer count to hardware */ 5003227364Sadrian /* aggregates are "one" buffer */ 5004227364Sadrian tid->hwq_depth++; 5005227364Sadrian 5006227364Sadrian /* Punt to hardware or software txq */ 5007227364Sadrian ath_tx_handoff(sc, txq, bf); 5008227364Sadrian } 5009227364Sadrian} 5010227364Sadrian 5011227364Sadrian/* 5012227364Sadrian * Schedule some packets to the given hardware queue. 5013227364Sadrian * 5014227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 5015227364Sadrian * with queued traffic) and attempts to schedule traffic 5016227364Sadrian * from them. 5017227364Sadrian * 5018227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 5019227364Sadrian * added to the end of the queue after some frames have been 5020227364Sadrian * scheduled. 5021227364Sadrian */ 5022227364Sadrianvoid 5023227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 5024227364Sadrian{ 5025227364Sadrian struct ath_tid *tid, *next, *last; 5026227364Sadrian 5027243786Sadrian ATH_TX_LOCK_ASSERT(sc); 5028227364Sadrian 5029227364Sadrian /* 5030227364Sadrian * Don't schedule if the hardware queue is busy. 5031227364Sadrian * This (hopefully) gives some more time to aggregate 5032227364Sadrian * some packets in the aggregation queue. 5033227364Sadrian */ 5034227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 5035227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 5036227364Sadrian return; 5037227364Sadrian } 5038227364Sadrian 5039227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 5040227364Sadrian 5041227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 5042227364Sadrian /* 5043227364Sadrian * Suspend paused queues here; they'll be resumed 5044227364Sadrian * once the addba completes or times out. 5045227364Sadrian */ 5046227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 5047227364Sadrian __func__, tid->tid, tid->paused); 5048227364Sadrian ath_tx_tid_unsched(sc, tid); 5049227364Sadrian if (tid->paused) { 5050227364Sadrian continue; 5051227364Sadrian } 5052227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 5053227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 5054227364Sadrian else 5055227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 5056227364Sadrian 5057227364Sadrian /* Not empty? Re-schedule */ 5058227364Sadrian if (tid->axq_depth != 0) 5059227364Sadrian ath_tx_tid_sched(sc, tid); 5060227364Sadrian 5061227364Sadrian /* Give the software queue time to aggregate more packets */ 5062227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 5063227364Sadrian break; 5064227364Sadrian } 5065227364Sadrian 5066227364Sadrian /* 5067227364Sadrian * If this was the last entry on the original list, stop. 5068227364Sadrian * Otherwise nodes that have been rescheduled onto the end 5069227364Sadrian * of the TID FIFO list will just keep being rescheduled. 5070227364Sadrian */ 5071227364Sadrian if (tid == last) 5072227364Sadrian break; 5073227364Sadrian } 5074227364Sadrian} 5075227364Sadrian 5076227364Sadrian/* 5077227364Sadrian * TX addba handling 5078227364Sadrian */ 5079227364Sadrian 5080227364Sadrian/* 5081227364Sadrian * Return net80211 TID struct pointer, or NULL for none 5082227364Sadrian */ 5083227364Sadrianstruct ieee80211_tx_ampdu * 5084227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 5085227364Sadrian{ 5086227364Sadrian struct ieee80211_node *ni = &an->an_node; 5087227364Sadrian struct ieee80211_tx_ampdu *tap; 5088227364Sadrian 5089227364Sadrian if (tid == IEEE80211_NONQOS_TID) 5090227364Sadrian return NULL; 5091227364Sadrian 5092234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 5093227364Sadrian return tap; 5094227364Sadrian} 5095227364Sadrian 5096227364Sadrian/* 5097227364Sadrian * Is AMPDU-TX running? 5098227364Sadrian */ 5099227364Sadrianstatic int 5100227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 5101227364Sadrian{ 5102227364Sadrian struct ieee80211_tx_ampdu *tap; 5103227364Sadrian 5104227364Sadrian if (tid == IEEE80211_NONQOS_TID) 5105227364Sadrian return 0; 5106227364Sadrian 5107227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 5108227364Sadrian if (tap == NULL) 5109227364Sadrian return 0; /* Not valid; default to not running */ 5110227364Sadrian 5111227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 5112227364Sadrian} 5113227364Sadrian 5114227364Sadrian/* 5115227364Sadrian * Is AMPDU-TX negotiation pending? 5116227364Sadrian */ 5117227364Sadrianstatic int 5118227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 5119227364Sadrian{ 5120227364Sadrian struct ieee80211_tx_ampdu *tap; 5121227364Sadrian 5122227364Sadrian if (tid == IEEE80211_NONQOS_TID) 5123227364Sadrian return 0; 5124227364Sadrian 5125227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 5126227364Sadrian if (tap == NULL) 5127227364Sadrian return 0; /* Not valid; default to not pending */ 5128227364Sadrian 5129227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 5130227364Sadrian} 5131227364Sadrian 5132227364Sadrian/* 5133227364Sadrian * Is AMPDU-TX pending for the given TID? 5134227364Sadrian */ 5135227364Sadrian 5136227364Sadrian 5137227364Sadrian/* 5138227364Sadrian * Method to handle sending an ADDBA request. 5139227364Sadrian * 5140227364Sadrian * We tap this so the relevant flags can be set to pause the TID 5141227364Sadrian * whilst waiting for the response. 5142227364Sadrian * 5143227364Sadrian * XXX there's no timeout handler we can override? 5144227364Sadrian */ 5145227364Sadrianint 5146227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 5147227364Sadrian int dialogtoken, int baparamset, int batimeout) 5148227364Sadrian{ 5149227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5150234324Sadrian int tid = tap->txa_tid; 5151227364Sadrian struct ath_node *an = ATH_NODE(ni); 5152227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5153227364Sadrian 5154227364Sadrian /* 5155227364Sadrian * XXX danger Will Robinson! 5156227364Sadrian * 5157227364Sadrian * Although the taskqueue may be running and scheduling some more 5158227364Sadrian * packets, these should all be _before_ the addba sequence number. 5159227364Sadrian * However, net80211 will keep self-assigning sequence numbers 5160227364Sadrian * until addba has been negotiated. 5161227364Sadrian * 5162227364Sadrian * In the past, these packets would be "paused" (which still works 5163227364Sadrian * fine, as they're being scheduled to the driver in the same 5164227364Sadrian * serialised method which is calling the addba request routine) 5165227364Sadrian * and when the aggregation session begins, they'll be dequeued 5166227364Sadrian * as aggregate packets and added to the BAW. However, now there's 5167227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 5168227364Sadrian * packets. Thus they never get included in the BAW tracking and 5169227364Sadrian * this can cause the initial burst of packets after the addba 5170227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 5171227364Sadrian * 5172227364Sadrian * The "eventual" solution should be to tag these packets with 5173227364Sadrian * dobaw. Although net80211 has given us a sequence number, 5174227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 5175227364Sadrian * fall within it. 5176227364Sadrian */ 5177243786Sadrian ATH_TX_LOCK(sc); 5178235774Sadrian /* 5179235774Sadrian * This is a bit annoying. Until net80211 HT code inherits some 5180235774Sadrian * (any) locking, we may have this called in parallel BUT only 5181235774Sadrian * one response/timeout will be called. Grr. 5182235774Sadrian */ 5183235774Sadrian if (atid->addba_tx_pending == 0) { 5184235774Sadrian ath_tx_tid_pause(sc, atid); 5185235774Sadrian atid->addba_tx_pending = 1; 5186235774Sadrian } 5187243786Sadrian ATH_TX_UNLOCK(sc); 5188227364Sadrian 5189227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5190227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 5191227364Sadrian __func__, dialogtoken, baparamset, batimeout); 5192227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5193227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 5194227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 5195227364Sadrian 5196227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 5197227364Sadrian batimeout); 5198227364Sadrian} 5199227364Sadrian 5200227364Sadrian/* 5201227364Sadrian * Handle an ADDBA response. 5202227364Sadrian * 5203227364Sadrian * We unpause the queue so TX'ing can resume. 5204227364Sadrian * 5205227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 5206227364Sadrian * aggregate or not) so the BAW is updated. 5207227364Sadrian * 5208227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 5209227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 5210227364Sadrian * edge won't match the ni->ni_txseq. 5211227364Sadrian * 5212227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 5213227364Sadrian * ni->ni_txseq. 5214227364Sadrian * 5215227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 5216227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 5217227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 5218227364Sadrian * window. 5219227364Sadrian */ 5220227364Sadrianint 5221227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 5222227364Sadrian int status, int code, int batimeout) 5223227364Sadrian{ 5224227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5225234324Sadrian int tid = tap->txa_tid; 5226227364Sadrian struct ath_node *an = ATH_NODE(ni); 5227227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5228227364Sadrian int r; 5229227364Sadrian 5230227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5231227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 5232227364Sadrian status, code, batimeout); 5233227364Sadrian 5234227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5235227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 5236227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 5237227364Sadrian 5238227364Sadrian /* 5239227364Sadrian * Call this first, so the interface flags get updated 5240227364Sadrian * before the TID is unpaused. Otherwise a race condition 5241227364Sadrian * exists where the unpaused TID still doesn't yet have 5242227364Sadrian * IEEE80211_AGGR_RUNNING set. 5243227364Sadrian */ 5244227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 5245227364Sadrian 5246243786Sadrian ATH_TX_LOCK(sc); 5247235774Sadrian atid->addba_tx_pending = 0; 5248227364Sadrian /* 5249227364Sadrian * XXX dirty! 5250227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 5251227364Sadrian * Read above for more information. 5252227364Sadrian */ 5253227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 5254227364Sadrian ath_tx_tid_resume(sc, atid); 5255243786Sadrian ATH_TX_UNLOCK(sc); 5256227364Sadrian return r; 5257227364Sadrian} 5258227364Sadrian 5259227364Sadrian 5260227364Sadrian/* 5261227364Sadrian * Stop ADDBA on a queue. 5262237593Sadrian * 5263237593Sadrian * This can be called whilst BAR TX is currently active on the queue, 5264237593Sadrian * so make sure this is unblocked before continuing. 5265227364Sadrian */ 5266227364Sadrianvoid 5267227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 5268227364Sadrian{ 5269227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5270234324Sadrian int tid = tap->txa_tid; 5271227364Sadrian struct ath_node *an = ATH_NODE(ni); 5272227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5273227364Sadrian 5274227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 5275227364Sadrian 5276237593Sadrian /* 5277237593Sadrian * Pause TID traffic early, so there aren't any races 5278237593Sadrian * Unblock the pending BAR held traffic, if it's currently paused. 5279237593Sadrian */ 5280243786Sadrian ATH_TX_LOCK(sc); 5281227364Sadrian ath_tx_tid_pause(sc, atid); 5282237593Sadrian if (atid->bar_wait) { 5283237593Sadrian /* 5284237593Sadrian * bar_unsuspend() expects bar_tx == 1, as it should be 5285237593Sadrian * called from the TX completion path. This quietens 5286237593Sadrian * the warning. It's cleared for us anyway. 5287237593Sadrian */ 5288237593Sadrian atid->bar_tx = 1; 5289237593Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 5290237593Sadrian } 5291243786Sadrian ATH_TX_UNLOCK(sc); 5292227364Sadrian 5293227364Sadrian /* There's no need to hold the TXQ lock here */ 5294227364Sadrian sc->sc_addba_stop(ni, tap); 5295227364Sadrian 5296227364Sadrian /* 5297235749Sadrian * ath_tx_tid_cleanup will resume the TID if possible, otherwise 5298227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 5299227364Sadrian * things have been cleaned up. 5300227364Sadrian */ 5301235749Sadrian ath_tx_tid_cleanup(sc, an, tid); 5302227364Sadrian} 5303227364Sadrian 5304227364Sadrian/* 5305227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 5306227364Sadrian * it simply tears down the aggregation session. Ew. 5307227364Sadrian * 5308227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 5309227364Sadrian * ic->ic_addba_stop(). 5310227364Sadrian * 5311227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 5312227364Sadrian * XXX BAR TX success or failure should be better handled! 5313227364Sadrian */ 5314227364Sadrianvoid 5315227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 5316227364Sadrian int status) 5317227364Sadrian{ 5318227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5319234324Sadrian int tid = tap->txa_tid; 5320227364Sadrian struct ath_node *an = ATH_NODE(ni); 5321227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5322227364Sadrian int attempts = tap->txa_attempts; 5323227364Sadrian 5324235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 5325235676Sadrian "%s: called; tap=%p, atid=%p, txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n", 5326235491Sadrian __func__, 5327235676Sadrian tap, 5328235676Sadrian atid, 5329235676Sadrian tap->txa_tid, 5330235676Sadrian atid->tid, 5331235491Sadrian status, 5332235491Sadrian attempts); 5333227364Sadrian 5334227364Sadrian /* Note: This may update the BAW details */ 5335227364Sadrian sc->sc_bar_response(ni, tap, status); 5336227364Sadrian 5337227364Sadrian /* Unpause the TID */ 5338227364Sadrian /* 5339227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 5340227364Sadrian * XXX to a non-aggregate session. So we must unpause the 5341227364Sadrian * XXX TID here or it'll never be done. 5342240721Sadrian * 5343240721Sadrian * Also, don't call it if bar_tx/bar_wait are 0; something 5344240721Sadrian * has beaten us to the punch? (XXX figure out what?) 5345227364Sadrian */ 5346227364Sadrian if (status == 0 || attempts == 50) { 5347243786Sadrian ATH_TX_LOCK(sc); 5348240721Sadrian if (atid->bar_tx == 0 || atid->bar_wait == 0) 5349240721Sadrian device_printf(sc->sc_dev, 5350240721Sadrian "%s: huh? bar_tx=%d, bar_wait=%d\n", 5351240721Sadrian __func__, 5352240721Sadrian atid->bar_tx, atid->bar_wait); 5353240721Sadrian else 5354240721Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 5355243786Sadrian ATH_TX_UNLOCK(sc); 5356227364Sadrian } 5357227364Sadrian} 5358227364Sadrian 5359227364Sadrian/* 5360227364Sadrian * This is called whenever the pending ADDBA request times out. 5361227364Sadrian * Unpause and reschedule the TID. 5362227364Sadrian */ 5363227364Sadrianvoid 5364227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 5365227364Sadrian struct ieee80211_tx_ampdu *tap) 5366227364Sadrian{ 5367227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5368234324Sadrian int tid = tap->txa_tid; 5369227364Sadrian struct ath_node *an = ATH_NODE(ni); 5370227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5371227364Sadrian 5372227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5373227364Sadrian "%s: called; resuming\n", __func__); 5374227364Sadrian 5375243786Sadrian ATH_TX_LOCK(sc); 5376235774Sadrian atid->addba_tx_pending = 0; 5377243786Sadrian ATH_TX_UNLOCK(sc); 5378235774Sadrian 5379227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 5380227364Sadrian sc->sc_addba_response_timeout(ni, tap); 5381227364Sadrian 5382227364Sadrian /* Unpause the TID; which reschedules it */ 5383243786Sadrian ATH_TX_LOCK(sc); 5384227364Sadrian ath_tx_tid_resume(sc, atid); 5385243786Sadrian ATH_TX_UNLOCK(sc); 5386227364Sadrian} 5387238710Sadrian 5388241170Sadrian/* 5389241170Sadrian * Check if a node is asleep or not. 5390241170Sadrian */ 5391242271Sadrianint 5392241170Sadrianath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an) 5393241170Sadrian{ 5394241170Sadrian 5395241170Sadrian ATH_NODE_LOCK_ASSERT(an); 5396241170Sadrian 5397241170Sadrian return (an->an_is_powersave); 5398241170Sadrian} 5399241170Sadrian 5400241170Sadrian/* 5401241170Sadrian * Mark a node as currently "in powersaving." 5402241170Sadrian * This suspends all traffic on the node. 5403241170Sadrian * 5404241170Sadrian * This must be called with the node/tx locks free. 5405241170Sadrian * 5406241170Sadrian * XXX TODO: the locking silliness below is due to how the node 5407241170Sadrian * locking currently works. Right now, the node lock is grabbed 5408241170Sadrian * to do rate control lookups and these are done with the TX 5409241170Sadrian * queue lock held. This means the node lock can't be grabbed 5410241170Sadrian * first here or a LOR will occur. 5411241170Sadrian * 5412241170Sadrian * Eventually (hopefully!) the TX path code will only grab 5413241170Sadrian * the TXQ lock when transmitting and the ath_node lock when 5414241170Sadrian * doing node/TID operations. There are other complications - 5415241170Sadrian * the sched/unsched operations involve walking the per-txq 5416241170Sadrian * 'active tid' list and this requires both locks to be held. 5417241170Sadrian */ 5418241170Sadrianvoid 5419241170Sadrianath_tx_node_sleep(struct ath_softc *sc, struct ath_node *an) 5420241170Sadrian{ 5421241170Sadrian struct ath_tid *atid; 5422241170Sadrian struct ath_txq *txq; 5423241170Sadrian int tid; 5424241170Sadrian 5425241170Sadrian ATH_NODE_UNLOCK_ASSERT(an); 5426241170Sadrian 5427241170Sadrian /* 5428241170Sadrian * It's possible that a parallel call to ath_tx_node_wakeup() 5429241170Sadrian * will unpause these queues. 5430241170Sadrian * 5431241170Sadrian * The node lock can't just be grabbed here, as there's places 5432241170Sadrian * in the driver where the node lock is grabbed _within_ a 5433241170Sadrian * TXQ lock. 5434241170Sadrian * So, we do this delicately and unwind state if needed. 5435241170Sadrian * 5436241170Sadrian * + Pause all the queues 5437241170Sadrian * + Grab the node lock 5438241170Sadrian * + If the queue is already asleep, unpause and quit 5439241170Sadrian * + else just mark as asleep. 5440241170Sadrian * 5441241170Sadrian * A parallel sleep() call will just pause and then 5442241170Sadrian * find they're already paused, so undo it. 5443241170Sadrian * 5444241170Sadrian * A parallel wakeup() call will check if asleep is 1 5445241170Sadrian * and if it's not (ie, it's 0), it'll treat it as already 5446241170Sadrian * being awake. If it's 1, it'll mark it as 0 and then 5447241170Sadrian * unpause everything. 5448241170Sadrian * 5449241170Sadrian * (Talk about a delicate hack.) 5450241170Sadrian */ 5451241170Sadrian 5452241170Sadrian /* Suspend all traffic on the node */ 5453243786Sadrian ATH_TX_LOCK(sc); 5454241170Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 5455241170Sadrian atid = &an->an_tid[tid]; 5456241170Sadrian txq = sc->sc_ac2q[atid->ac]; 5457241170Sadrian 5458241170Sadrian ath_tx_tid_pause(sc, atid); 5459241170Sadrian } 5460243786Sadrian ATH_TX_UNLOCK(sc); 5461241170Sadrian 5462241170Sadrian ATH_NODE_LOCK(an); 5463241170Sadrian 5464241170Sadrian /* In case of concurrency races from net80211.. */ 5465241170Sadrian if (an->an_is_powersave == 1) { 5466241170Sadrian ATH_NODE_UNLOCK(an); 5467241170Sadrian device_printf(sc->sc_dev, 5468241170Sadrian "%s: an=%p: node was already asleep\n", 5469241170Sadrian __func__, an); 5470243786Sadrian ATH_TX_LOCK(sc); 5471241170Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 5472241170Sadrian atid = &an->an_tid[tid]; 5473241170Sadrian txq = sc->sc_ac2q[atid->ac]; 5474241170Sadrian 5475241170Sadrian ath_tx_tid_resume(sc, atid); 5476241170Sadrian } 5477243786Sadrian ATH_TX_UNLOCK(sc); 5478241170Sadrian return; 5479241170Sadrian } 5480241170Sadrian 5481241170Sadrian /* Mark node as in powersaving */ 5482241170Sadrian an->an_is_powersave = 1; 5483241170Sadrian 5484241170Sadrian ATH_NODE_UNLOCK(an); 5485241170Sadrian} 5486241170Sadrian 5487241170Sadrian/* 5488241170Sadrian * Mark a node as currently "awake." 5489241170Sadrian * This resumes all traffic to the node. 5490241170Sadrian */ 5491241170Sadrianvoid 5492241170Sadrianath_tx_node_wakeup(struct ath_softc *sc, struct ath_node *an) 5493241170Sadrian{ 5494241170Sadrian struct ath_tid *atid; 5495241170Sadrian struct ath_txq *txq; 5496241170Sadrian int tid; 5497241170Sadrian 5498241170Sadrian ATH_NODE_UNLOCK_ASSERT(an); 5499241170Sadrian ATH_NODE_LOCK(an); 5500241170Sadrian 5501241170Sadrian /* In case of concurrency races from net80211.. */ 5502241170Sadrian if (an->an_is_powersave == 0) { 5503241170Sadrian ATH_NODE_UNLOCK(an); 5504241170Sadrian device_printf(sc->sc_dev, 5505241170Sadrian "%s: an=%p: node was already awake\n", 5506241170Sadrian __func__, an); 5507241170Sadrian return; 5508241170Sadrian } 5509241170Sadrian 5510241170Sadrian /* Mark node as awake */ 5511241170Sadrian an->an_is_powersave = 0; 5512241170Sadrian 5513241170Sadrian ATH_NODE_UNLOCK(an); 5514241170Sadrian 5515243786Sadrian ATH_TX_LOCK(sc); 5516241170Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 5517241170Sadrian atid = &an->an_tid[tid]; 5518241170Sadrian txq = sc->sc_ac2q[atid->ac]; 5519241170Sadrian 5520241170Sadrian ath_tx_tid_resume(sc, atid); 5521241170Sadrian } 5522243786Sadrian ATH_TX_UNLOCK(sc); 5523241170Sadrian} 5524241170Sadrian 5525241170Sadrianstatic int 5526238710Sadrianath_legacy_dma_txsetup(struct ath_softc *sc) 5527238710Sadrian{ 5528238710Sadrian 5529238710Sadrian /* nothing new needed */ 5530238710Sadrian return (0); 5531238710Sadrian} 5532238710Sadrian 5533238710Sadrianstatic int 5534238710Sadrianath_legacy_dma_txteardown(struct ath_softc *sc) 5535238710Sadrian{ 5536238710Sadrian 5537238710Sadrian /* nothing new needed */ 5538238710Sadrian return (0); 5539238710Sadrian} 5540238710Sadrian 5541238710Sadrianvoid 5542238710Sadrianath_xmit_setup_legacy(struct ath_softc *sc) 5543238710Sadrian{ 5544238729Sadrian /* 5545238729Sadrian * For now, just set the descriptor length to sizeof(ath_desc); 5546238729Sadrian * worry about extracting the real length out of the HAL later. 5547238729Sadrian */ 5548238729Sadrian sc->sc_tx_desclen = sizeof(struct ath_desc); 5549243162Sadrian sc->sc_tx_statuslen = sizeof(struct ath_desc); 5550238729Sadrian sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */ 5551238710Sadrian 5552238710Sadrian sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup; 5553238710Sadrian sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown; 5554238931Sadrian sc->sc_tx.xmit_attach_comp_func = ath_legacy_attach_comp_func; 5555238930Sadrian 5556238930Sadrian sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart; 5557238930Sadrian sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff; 5558239204Sadrian 5559239204Sadrian sc->sc_tx.xmit_drain = ath_legacy_tx_drain; 5560238710Sadrian} 5561