if_ath_tx.c revision 248676
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 248676 2013-03-24 04:09:54Z 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 */ 315218065Sadrian bf->bf_nseg = ATH_TXDESC+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 */ 326218065Sadrian if (bf->bf_nseg > ATH_TXDESC) { /* too many desc's, linearize */ 327218065Sadrian sc->sc_stats.ast_tx_linear++; 328243857Sglebius m = m_collapse(m0, M_NOWAIT, ATH_TXDESC); 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 } 343218065Sadrian KASSERT(bf->bf_nseg <= ATH_TXDESC, 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); 707227364Sadrian if (txq->axq_link != NULL) { 708227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 709227364Sadrian struct ieee80211_frame *wh; 710227364Sadrian 711227364Sadrian /* mark previous frame */ 712227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 713227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 714227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 715227364Sadrian BUS_DMASYNC_PREWRITE); 716227364Sadrian 717227364Sadrian /* link descriptor */ 718227364Sadrian *txq->axq_link = bf->bf_daddr; 719227364Sadrian } 720227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 721238609Sadrian ath_hal_gettxdesclinkptr(sc->sc_ah, bf->bf_lastds, &txq->axq_link); 722248671Sadrian ATH_TXQ_UNLOCK(txq); 723227364Sadrian} 724227364Sadrian 725227364Sadrian/* 726227364Sadrian * Hand-off packet to a hardware queue. 727227364Sadrian */ 728227364Sadrianstatic void 729229949Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, 730229949Sadrian struct ath_buf *bf) 731227364Sadrian{ 732227364Sadrian struct ath_hal *ah = sc->sc_ah; 733227364Sadrian 734227364Sadrian /* 735218065Sadrian * Insert the frame on the outbound list and pass it on 736218065Sadrian * to the hardware. Multicast frames buffered for power 737218065Sadrian * save stations and transmit from the CAB queue are stored 738218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 739218065Sadrian * the SWBA handler since frames only go out on DTIM and 740218065Sadrian * to avoid possible races. 741218065Sadrian */ 742243786Sadrian ATH_TX_LOCK_ASSERT(sc); 743218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 744227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 745227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 746227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 747227364Sadrian 748227651Sadrian#if 0 749227651Sadrian /* 750227651Sadrian * This causes a LOR. Find out where the PCU lock is being 751227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 752227651Sadrian * be occuring. 753227651Sadrian */ 754227651Sadrian ATH_PCU_LOCK(sc); 755227651Sadrian if (sc->sc_inreset_cnt) { 756227651Sadrian ATH_PCU_UNLOCK(sc); 757227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 758227651Sadrian "%s: called with sc_in_reset != 0\n", 759227651Sadrian __func__); 760227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 761227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 762227651Sadrian __func__, txq->axq_qnum, 763227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 764227651Sadrian txq->axq_depth); 765227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 766227651Sadrian if (bf->bf_state.bfs_aggr) 767227651Sadrian txq->axq_aggr_depth++; 768227651Sadrian /* 769227651Sadrian * There's no need to update axq_link; the hardware 770227651Sadrian * is in reset and once the reset is complete, any 771227651Sadrian * non-empty queues will simply have DMA restarted. 772227651Sadrian */ 773227651Sadrian return; 774227651Sadrian } 775227651Sadrian ATH_PCU_UNLOCK(sc); 776227651Sadrian#endif 777227651Sadrian 778227364Sadrian /* For now, so not to generate whitespace diffs */ 779227364Sadrian if (1) { 780248671Sadrian ATH_TXQ_LOCK(txq); 781218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 782218065Sadrian int qbusy; 783218065Sadrian 784218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 785218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 786240899Sadrian 787240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 4, 788240899Sadrian "ath_tx_handoff: txq=%u, add bf=%p, qbusy=%d, depth=%d", 789240899Sadrian txq->axq_qnum, bf, qbusy, txq->axq_depth); 790218065Sadrian if (txq->axq_link == NULL) { 791218065Sadrian /* 792218065Sadrian * Be careful writing the address to TXDP. If 793218065Sadrian * the tx q is enabled then this write will be 794218065Sadrian * ignored. Normally this is not an issue but 795218065Sadrian * when tdma is in use and the q is beacon gated 796218065Sadrian * this race can occur. If the q is busy then 797218065Sadrian * defer the work to later--either when another 798218065Sadrian * packet comes along or when we prepare a beacon 799218065Sadrian * frame at SWBA. 800218065Sadrian */ 801218065Sadrian if (!qbusy) { 802229949Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 803229949Sadrian bf->bf_daddr); 804218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 805218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 806240899Sadrian "%s: TXDP[%u] = %p (%p) lastds=%p depth %d\n", 807218065Sadrian __func__, txq->axq_qnum, 808218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 809240899Sadrian bf->bf_lastds, 810218065Sadrian txq->axq_depth); 811240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 5, 812240899Sadrian "ath_tx_handoff: TXDP[%u] = %p (%p) " 813240899Sadrian "lastds=%p depth %d", 814240899Sadrian txq->axq_qnum, 815240899Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 816240899Sadrian bf->bf_lastds, 817240899Sadrian txq->axq_depth); 818218065Sadrian } else { 819218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 820218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 821218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 822218065Sadrian txq->axq_qnum); 823240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 0, "defer enable"); 824218065Sadrian } 825218065Sadrian } else { 826218065Sadrian *txq->axq_link = bf->bf_daddr; 827218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 828218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 829218065Sadrian txq->axq_qnum, txq->axq_link, 830229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 831229949Sadrian txq->axq_depth); 832240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 5, 833240899Sadrian "ath_tx_handoff: link[%u](%p)=%p (%p) lastds=%p", 834240899Sadrian txq->axq_qnum, txq->axq_link, 835240899Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 836240899Sadrian bf->bf_lastds); 837240899Sadrian 838218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 839218065Sadrian /* 840218065Sadrian * The q was busy when we previously tried 841218065Sadrian * to write the address of the first buffer 842218065Sadrian * in the chain. Since it's not busy now 843218065Sadrian * handle this chore. We are certain the 844218065Sadrian * buffer at the front is the right one since 845218065Sadrian * axq_link is NULL only when the buffer list 846218065Sadrian * is/was empty. 847218065Sadrian */ 848218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 849227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 850218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 851218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 852218065Sadrian "%s: Q%u restarted\n", __func__, 853218065Sadrian txq->axq_qnum); 854240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 4, 855240899Sadrian "ath_tx_handoff: txq[%d] restarted, bf=%p " 856240899Sadrian "daddr=%p ds=%p", 857240899Sadrian txq->axq_qnum, 858240899Sadrian bf, 859240899Sadrian (caddr_t)bf->bf_daddr, 860240899Sadrian bf->bf_desc); 861218065Sadrian } 862218065Sadrian } 863218065Sadrian#else 864218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 865241500Sadrian ATH_KTR(sc, ATH_KTR_TX, 3, 866241500Sadrian "ath_tx_handoff: non-tdma: txq=%u, add bf=%p " 867240899Sadrian "depth=%d", 868240899Sadrian txq->axq_qnum, 869240899Sadrian bf, 870240899Sadrian txq->axq_depth); 871218065Sadrian if (txq->axq_link == NULL) { 872218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 873218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 874218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 875218065Sadrian __func__, txq->axq_qnum, 876218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 877218065Sadrian txq->axq_depth); 878240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 5, 879240899Sadrian "ath_tx_handoff: non-tdma: TXDP[%u] = %p (%p) " 880240899Sadrian "lastds=%p depth %d", 881240899Sadrian txq->axq_qnum, 882240899Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 883240899Sadrian bf->bf_lastds, 884240899Sadrian txq->axq_depth); 885240899Sadrian 886218065Sadrian } else { 887218065Sadrian *txq->axq_link = bf->bf_daddr; 888218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 889218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 890218065Sadrian txq->axq_qnum, txq->axq_link, 891229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 892229949Sadrian txq->axq_depth); 893240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 5, 894240899Sadrian "ath_tx_handoff: non-tdma: link[%u](%p)=%p (%p) " 895240899Sadrian "lastds=%d", 896240899Sadrian txq->axq_qnum, txq->axq_link, 897240899Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 898240899Sadrian bf->bf_lastds); 899240899Sadrian 900218065Sadrian } 901218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 902227360Sadrian if (bf->bf_state.bfs_aggr) 903227360Sadrian txq->axq_aggr_depth++; 904238609Sadrian ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link); 905218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 906248671Sadrian ATH_TXQ_UNLOCK(txq); 907240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 1, 908240899Sadrian "ath_tx_handoff: txq=%u, txstart", txq->axq_qnum); 909227364Sadrian } 910227364Sadrian} 911218065Sadrian 912227364Sadrian/* 913227364Sadrian * Restart TX DMA for the given TXQ. 914227364Sadrian * 915227364Sadrian * This must be called whether the queue is empty or not. 916227364Sadrian */ 917238930Sadrianstatic void 918238930Sadrianath_legacy_tx_dma_restart(struct ath_softc *sc, struct ath_txq *txq) 919227364Sadrian{ 920227364Sadrian struct ath_hal *ah = sc->sc_ah; 921232707Sadrian struct ath_buf *bf, *bf_last; 922218065Sadrian 923248671Sadrian ATH_TXQ_LOCK_ASSERT(txq); 924227364Sadrian /* This is always going to be cleared, empty or not */ 925227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 926227364Sadrian 927232707Sadrian /* XXX make this ATH_TXQ_FIRST */ 928227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 929232707Sadrian bf_last = ATH_TXQ_LAST(txq, axq_q_s); 930232707Sadrian 931227364Sadrian if (bf == NULL) 932227364Sadrian return; 933227364Sadrian 934227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 935239120Sadrian ath_hal_gettxdesclinkptr(ah, bf_last->bf_lastds, &txq->axq_link); 936227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 937218065Sadrian} 938218065Sadrian 939227364Sadrian/* 940227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 941227364Sadrian * 942227364Sadrian * The relevant hardware txq should be locked. 943227364Sadrian */ 944227364Sadrianstatic void 945238930Sadrianath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq, 946238930Sadrian struct ath_buf *bf) 947227364Sadrian{ 948243786Sadrian ATH_TX_LOCK_ASSERT(sc); 949227364Sadrian 950243162Sadrian#ifdef ATH_DEBUG_ALQ 951243162Sadrian if (if_ath_alq_checkdebug(&sc->sc_alq, ATH_ALQ_EDMA_TXDESC)) 952243162Sadrian ath_tx_alq_post(sc, bf); 953243162Sadrian#endif 954243162Sadrian 955227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 956227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 957227364Sadrian else 958227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 959227364Sadrian} 960227364Sadrian 961218154Sadrianstatic int 962218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 963229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 964229949Sadrian int *keyix) 965218154Sadrian{ 966233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 967233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 968233330Sadrian __func__, 969233330Sadrian *hdrlen, 970233330Sadrian *pktlen, 971233330Sadrian isfrag, 972233330Sadrian iswep, 973233330Sadrian m0); 974233330Sadrian 975218154Sadrian if (iswep) { 976218154Sadrian const struct ieee80211_cipher *cip; 977218154Sadrian struct ieee80211_key *k; 978218154Sadrian 979218154Sadrian /* 980218154Sadrian * Construct the 802.11 header+trailer for an encrypted 981218154Sadrian * frame. The only reason this can fail is because of an 982218154Sadrian * unknown or unsupported cipher/key type. 983218154Sadrian */ 984218154Sadrian k = ieee80211_crypto_encap(ni, m0); 985218154Sadrian if (k == NULL) { 986218154Sadrian /* 987218154Sadrian * This can happen when the key is yanked after the 988218154Sadrian * frame was queued. Just discard the frame; the 989218154Sadrian * 802.11 layer counts failures and provides 990218154Sadrian * debugging/diagnostics. 991218154Sadrian */ 992229949Sadrian return (0); 993218154Sadrian } 994218154Sadrian /* 995218154Sadrian * Adjust the packet + header lengths for the crypto 996218154Sadrian * additions and calculate the h/w key index. When 997218154Sadrian * a s/w mic is done the frame will have had any mic 998218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 999218154Sadrian * account for it. Otherwise we need to add it to the 1000218154Sadrian * packet length. 1001218154Sadrian */ 1002218154Sadrian cip = k->wk_cipher; 1003218154Sadrian (*hdrlen) += cip->ic_header; 1004218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 1005218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 1006218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 1007218154Sadrian (*pktlen) += cip->ic_miclen; 1008218154Sadrian (*keyix) = k->wk_keyix; 1009218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 1010218154Sadrian /* 1011218154Sadrian * Use station key cache slot, if assigned. 1012218154Sadrian */ 1013218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 1014218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 1015218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 1016218154Sadrian } else 1017218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 1018218154Sadrian 1019229949Sadrian return (1); 1020218154Sadrian} 1021218154Sadrian 1022233989Sadrian/* 1023233989Sadrian * Calculate whether interoperability protection is required for 1024233989Sadrian * this frame. 1025233989Sadrian * 1026233989Sadrian * This requires the rate control information be filled in, 1027233989Sadrian * as the protection requirement depends upon the current 1028233989Sadrian * operating mode / PHY. 1029233989Sadrian */ 1030233989Sadrianstatic void 1031233989Sadrianath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf) 1032233989Sadrian{ 1033233989Sadrian struct ieee80211_frame *wh; 1034233989Sadrian uint8_t rix; 1035233989Sadrian uint16_t flags; 1036233989Sadrian int shortPreamble; 1037233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 1038233989Sadrian struct ifnet *ifp = sc->sc_ifp; 1039233989Sadrian struct ieee80211com *ic = ifp->if_l2com; 1040233989Sadrian 1041233989Sadrian flags = bf->bf_state.bfs_txflags; 1042233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 1043233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 1044233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 1045233989Sadrian 1046233989Sadrian /* 1047233989Sadrian * If 802.11g protection is enabled, determine whether 1048233989Sadrian * to use RTS/CTS or just CTS. Note that this is only 1049233989Sadrian * done for OFDM unicast frames. 1050233989Sadrian */ 1051233989Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 1052233989Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 1053233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1054233989Sadrian bf->bf_state.bfs_doprot = 1; 1055233989Sadrian /* XXX fragments must use CCK rates w/ protection */ 1056233989Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 1057233989Sadrian flags |= HAL_TXDESC_RTSENA; 1058233989Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 1059233989Sadrian flags |= HAL_TXDESC_CTSENA; 1060233989Sadrian } 1061233989Sadrian /* 1062233989Sadrian * For frags it would be desirable to use the 1063233989Sadrian * highest CCK rate for RTS/CTS. But stations 1064233989Sadrian * farther away may detect it at a lower CCK rate 1065233989Sadrian * so use the configured protection rate instead 1066233989Sadrian * (for now). 1067233989Sadrian */ 1068233989Sadrian sc->sc_stats.ast_tx_protect++; 1069233989Sadrian } 1070233989Sadrian 1071233989Sadrian /* 1072233989Sadrian * If 11n protection is enabled and it's a HT frame, 1073233989Sadrian * enable RTS. 1074233989Sadrian * 1075233989Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 1076233989Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 1077233989Sadrian * XXX indicates it's not a HT pure environment? 1078233989Sadrian */ 1079233989Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 1080233989Sadrian rt->info[rix].phy == IEEE80211_T_HT && 1081233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 1082233989Sadrian flags |= HAL_TXDESC_RTSENA; 1083233989Sadrian sc->sc_stats.ast_tx_htprotect++; 1084233989Sadrian } 1085233989Sadrian bf->bf_state.bfs_txflags = flags; 1086233989Sadrian} 1087233989Sadrian 1088233989Sadrian/* 1089233989Sadrian * Update the frame duration given the currently selected rate. 1090233989Sadrian * 1091233989Sadrian * This also updates the frame duration value, so it will require 1092233989Sadrian * a DMA flush. 1093233989Sadrian */ 1094233989Sadrianstatic void 1095233989Sadrianath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf) 1096233989Sadrian{ 1097233989Sadrian struct ieee80211_frame *wh; 1098233989Sadrian uint8_t rix; 1099233989Sadrian uint16_t flags; 1100233989Sadrian int shortPreamble; 1101233989Sadrian struct ath_hal *ah = sc->sc_ah; 1102233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 1103233989Sadrian int isfrag = bf->bf_m->m_flags & M_FRAG; 1104233989Sadrian 1105233989Sadrian flags = bf->bf_state.bfs_txflags; 1106233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 1107233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 1108233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 1109233989Sadrian 1110233989Sadrian /* 1111233989Sadrian * Calculate duration. This logically belongs in the 802.11 1112233989Sadrian * layer but it lacks sufficient information to calculate it. 1113233989Sadrian */ 1114233989Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 1115233989Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 1116233989Sadrian u_int16_t dur; 1117233989Sadrian if (shortPreamble) 1118233989Sadrian dur = rt->info[rix].spAckDuration; 1119233989Sadrian else 1120233989Sadrian dur = rt->info[rix].lpAckDuration; 1121233989Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 1122233989Sadrian dur += dur; /* additional SIFS+ACK */ 1123246745Sadrian KASSERT(bf->bf_m->m_nextpkt != NULL, ("no fragment")); 1124233989Sadrian /* 1125233989Sadrian * Include the size of next fragment so NAV is 1126233989Sadrian * updated properly. The last fragment uses only 1127233989Sadrian * the ACK duration 1128242144Sadrian * 1129242144Sadrian * XXX TODO: ensure that the rate lookup for each 1130242144Sadrian * fragment is the same as the rate used by the 1131242144Sadrian * first fragment! 1132233989Sadrian */ 1133233989Sadrian dur += ath_hal_computetxtime(ah, rt, 1134246745Sadrian bf->bf_m->m_nextpkt->m_pkthdr.len, 1135233989Sadrian rix, shortPreamble); 1136233989Sadrian } 1137233989Sadrian if (isfrag) { 1138233989Sadrian /* 1139233989Sadrian * Force hardware to use computed duration for next 1140233989Sadrian * fragment by disabling multi-rate retry which updates 1141233989Sadrian * duration based on the multi-rate duration table. 1142233989Sadrian */ 1143233989Sadrian bf->bf_state.bfs_ismrr = 0; 1144233989Sadrian bf->bf_state.bfs_try0 = ATH_TXMGTTRY; 1145233989Sadrian /* XXX update bfs_rc[0].try? */ 1146233989Sadrian } 1147233989Sadrian 1148233989Sadrian /* Update the duration field itself */ 1149233989Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 1150233989Sadrian } 1151233989Sadrian} 1152233989Sadrian 1153218932Sadrianstatic uint8_t 1154218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 1155227364Sadrian int cix, int shortPreamble) 1156218157Sadrian{ 1157218932Sadrian uint8_t ctsrate; 1158218932Sadrian 1159218157Sadrian /* 1160218157Sadrian * CTS transmit rate is derived from the transmit rate 1161218157Sadrian * by looking in the h/w rate table. We must also factor 1162218157Sadrian * in whether or not a short preamble is to be used. 1163218157Sadrian */ 1164218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 1165218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 1166218932Sadrian ctsrate = rt->info[cix].rateCode; 1167218932Sadrian 1168218932Sadrian /* XXX this should only matter for legacy rates */ 1169218932Sadrian if (shortPreamble) 1170218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 1171218932Sadrian 1172229949Sadrian return (ctsrate); 1173218932Sadrian} 1174218932Sadrian 1175218932Sadrian/* 1176218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 1177218932Sadrian */ 1178218932Sadrianstatic int 1179218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 1180218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 1181218932Sadrian int flags) 1182218932Sadrian{ 1183218932Sadrian int ctsduration = 0; 1184218932Sadrian 1185218932Sadrian /* This mustn't be called for HT modes */ 1186218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 1187218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 1188218932Sadrian __func__, rt->info[cix].rateCode); 1189229949Sadrian return (-1); 1190218932Sadrian } 1191218932Sadrian 1192218157Sadrian /* 1193218157Sadrian * Compute the transmit duration based on the frame 1194218157Sadrian * size and the size of an ACK frame. We call into the 1195218157Sadrian * HAL to do the computation since it depends on the 1196218157Sadrian * characteristics of the actual PHY being used. 1197218157Sadrian * 1198218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 1199218157Sadrian * use the precalculated ACK durations. 1200218157Sadrian */ 1201218157Sadrian if (shortPreamble) { 1202218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1203218932Sadrian ctsduration += rt->info[cix].spAckDuration; 1204218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1205218157Sadrian rt, pktlen, rix, AH_TRUE); 1206218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1207218932Sadrian ctsduration += rt->info[rix].spAckDuration; 1208218157Sadrian } else { 1209218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1210218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 1211218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1212218157Sadrian rt, pktlen, rix, AH_FALSE); 1213218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1214218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 1215218157Sadrian } 1216218932Sadrian 1217229949Sadrian return (ctsduration); 1218218157Sadrian} 1219218157Sadrian 1220227364Sadrian/* 1221227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 1222227364Sadrian * values. 1223227364Sadrian * 1224227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 1225227364Sadrian * and cts duration must be re-calculated. 1226227364Sadrian * 1227227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 1228227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 1229227364Sadrian * 1230227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 1231227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 1232227364Sadrian */ 1233227364Sadrianstatic void 1234227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 1235218065Sadrian{ 1236227364Sadrian uint16_t ctsduration = 0; 1237227364Sadrian uint8_t ctsrate = 0; 1238227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 1239227364Sadrian uint8_t cix = 0; 1240227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 1241227364Sadrian 1242227364Sadrian /* 1243227364Sadrian * No RTS/CTS enabled? Don't bother. 1244227364Sadrian */ 1245233966Sadrian if ((bf->bf_state.bfs_txflags & 1246227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 1247227364Sadrian /* XXX is this really needed? */ 1248227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1249227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1250227364Sadrian return; 1251227364Sadrian } 1252227364Sadrian 1253227364Sadrian /* 1254227364Sadrian * If protection is enabled, use the protection rix control 1255227364Sadrian * rate. Otherwise use the rate0 control rate. 1256227364Sadrian */ 1257227364Sadrian if (bf->bf_state.bfs_doprot) 1258227364Sadrian rix = sc->sc_protrix; 1259227364Sadrian else 1260227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 1261227364Sadrian 1262227364Sadrian /* 1263227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 1264227364Sadrian * use it. 1265227364Sadrian */ 1266227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 1267227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 1268227364Sadrian else 1269227364Sadrian /* Control rate from above */ 1270227364Sadrian cix = rt->info[rix].controlRate; 1271227364Sadrian 1272227364Sadrian /* Calculate the rtscts rate for the given cix */ 1273227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 1274227364Sadrian bf->bf_state.bfs_shpream); 1275227364Sadrian 1276227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 1277227364Sadrian if (! ath_tx_is_11n(sc)) 1278227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 1279227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 1280233966Sadrian rt, bf->bf_state.bfs_txflags); 1281227364Sadrian 1282227364Sadrian /* Squirrel away in ath_buf */ 1283227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 1284227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 1285227364Sadrian 1286227364Sadrian /* 1287227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 1288227364Sadrian */ 1289238961Sadrian if (!sc->sc_mrrprot) { 1290238961Sadrian bf->bf_state.bfs_ismrr = 0; 1291238961Sadrian bf->bf_state.bfs_try0 = 1292238961Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 1293238961Sadrian } 1294227364Sadrian} 1295227364Sadrian 1296227364Sadrian/* 1297227364Sadrian * Setup the descriptor chain for a normal or fast-frame 1298227364Sadrian * frame. 1299239051Sadrian * 1300239051Sadrian * XXX TODO: extend to include the destination hardware QCU ID. 1301239051Sadrian * Make sure that is correct. Make sure that when being added 1302239051Sadrian * to the mcastq, the CABQ QCUID is set or things will get a bit 1303239051Sadrian * odd. 1304227364Sadrian */ 1305227364Sadrianstatic void 1306227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 1307227364Sadrian{ 1308227364Sadrian struct ath_desc *ds = bf->bf_desc; 1309227364Sadrian struct ath_hal *ah = sc->sc_ah; 1310227364Sadrian 1311242951Sadrian if (bf->bf_state.bfs_txrate0 == 0) 1312242951Sadrian device_printf(sc->sc_dev, "%s: bf=%p, txrate0=%d\n", 1313242951Sadrian __func__, bf, 0); 1314242951Sadrian 1315227364Sadrian ath_hal_setuptxdesc(ah, ds 1316227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 1317227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 1318227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 1319227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 1320227364Sadrian , bf->bf_state.bfs_txrate0 1321227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 1322227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 1323227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 1324233966Sadrian , bf->bf_state.bfs_txflags /* flags */ 1325227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 1326227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 1327227364Sadrian ); 1328227364Sadrian 1329227364Sadrian /* 1330227364Sadrian * This will be overriden when the descriptor chain is written. 1331227364Sadrian */ 1332227364Sadrian bf->bf_lastds = ds; 1333227364Sadrian bf->bf_last = bf; 1334227364Sadrian 1335238947Sadrian /* Set rate control and descriptor chain for this frame */ 1336238947Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1337242656Sadrian ath_tx_chaindesclist(sc, ds, bf, 0, 0, 0); 1338227364Sadrian} 1339227364Sadrian 1340227364Sadrian/* 1341227364Sadrian * Do a rate lookup. 1342227364Sadrian * 1343227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 1344227364Sadrian * Non-data frames and raw frames don't require it. 1345227364Sadrian * 1346227364Sadrian * This populates the primary and MRR entries; MRR values are 1347227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 1348227364Sadrian * pre-11n chipsets. 1349227364Sadrian * 1350227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 1351227364Sadrian * as they may depend upon the rate chosen. 1352227364Sadrian */ 1353227364Sadrianstatic void 1354227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 1355227364Sadrian{ 1356227364Sadrian uint8_t rate, rix; 1357227364Sadrian int try0; 1358227364Sadrian 1359227364Sadrian if (! bf->bf_state.bfs_doratelookup) 1360227364Sadrian return; 1361227364Sadrian 1362227364Sadrian /* Get rid of any previous state */ 1363227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1364227364Sadrian 1365227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 1366227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 1367227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 1368227364Sadrian 1369227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 1370227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1371227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 1372227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1373227364Sadrian 1374227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 1375227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 1376227364Sadrian bf->bf_state.bfs_rc); 1377227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 1378227364Sadrian 1379227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 1380227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 1381227364Sadrian bf->bf_state.bfs_try0 = try0; 1382227364Sadrian bf->bf_state.bfs_txrate0 = rate; 1383227364Sadrian} 1384227364Sadrian 1385227364Sadrian/* 1386240883Sadrian * Update the CLRDMASK bit in the ath_buf if it needs to be set. 1387240883Sadrian */ 1388240883Sadrianstatic void 1389240883Sadrianath_tx_update_clrdmask(struct ath_softc *sc, struct ath_tid *tid, 1390240883Sadrian struct ath_buf *bf) 1391240883Sadrian{ 1392245708Sadrian struct ath_node *an = ATH_NODE(bf->bf_node); 1393240883Sadrian 1394243786Sadrian ATH_TX_LOCK_ASSERT(sc); 1395240883Sadrian 1396245708Sadrian if (an->clrdmask == 1) { 1397240883Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 1398245708Sadrian an->clrdmask = 0; 1399240883Sadrian } 1400240883Sadrian} 1401240883Sadrian 1402240883Sadrian/* 1403227364Sadrian * Transmit the given frame to the hardware. 1404227364Sadrian * 1405227364Sadrian * The frame must already be setup; rate control must already have 1406227364Sadrian * been done. 1407227364Sadrian * 1408227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 1409227364Sadrian * it for this long when not doing software aggregation), later on 1410227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 1411227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 1412227364Sadrian */ 1413227364Sadrianstatic void 1414227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 1415227364Sadrian struct ath_buf *bf) 1416227364Sadrian{ 1417240883Sadrian struct ath_node *an = ATH_NODE(bf->bf_node); 1418240883Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 1419227364Sadrian 1420243786Sadrian ATH_TX_LOCK_ASSERT(sc); 1421227364Sadrian 1422240883Sadrian /* 1423240883Sadrian * For now, just enable CLRDMASK. ath_tx_xmit_normal() does 1424240883Sadrian * set a completion handler however it doesn't (yet) properly 1425240883Sadrian * handle the strict ordering requirements needed for normal, 1426240883Sadrian * non-aggregate session frames. 1427240883Sadrian * 1428240883Sadrian * Once this is implemented, only set CLRDMASK like this for 1429240883Sadrian * frames that must go out - eg management/raw frames. 1430240883Sadrian */ 1431240883Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 1432240883Sadrian 1433227364Sadrian /* Setup the descriptor before handoff */ 1434227364Sadrian ath_tx_do_ratelookup(sc, bf); 1435233989Sadrian ath_tx_calc_duration(sc, bf); 1436233989Sadrian ath_tx_calc_protection(sc, bf); 1437233989Sadrian ath_tx_set_rtscts(sc, bf); 1438227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1439227364Sadrian ath_tx_setds(sc, bf); 1440227364Sadrian 1441240883Sadrian /* Track per-TID hardware queue depth correctly */ 1442240883Sadrian tid->hwq_depth++; 1443240724Sadrian 1444240883Sadrian /* Assign the completion handler */ 1445240883Sadrian bf->bf_comp = ath_tx_normal_comp; 1446240883Sadrian 1447227364Sadrian /* Hand off to hardware */ 1448227364Sadrian ath_tx_handoff(sc, txq, bf); 1449227364Sadrian} 1450227364Sadrian 1451240722Sadrian/* 1452240722Sadrian * Do the basic frame setup stuff that's required before the frame 1453240722Sadrian * is added to a software queue. 1454240722Sadrian * 1455240722Sadrian * All frames get mostly the same treatment and it's done once. 1456240722Sadrian * Retransmits fiddle with things like the rate control setup, 1457240722Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 1458240722Sadrian * syncing and relinking it (back) into the hardware TX queue. 1459240722Sadrian * 1460240722Sadrian * Note that this may cause the mbuf to be reallocated, so 1461240722Sadrian * m0 may not be valid. 1462240722Sadrian */ 1463227364Sadrianstatic int 1464227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1465234009Sadrian struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq) 1466227364Sadrian{ 1467218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1468218065Sadrian struct ath_hal *ah = sc->sc_ah; 1469218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1470218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1471218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1472218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1473227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1474227364Sadrian u_int8_t rix = 0, txrate = 0; 1475218065Sadrian struct ath_desc *ds; 1476218065Sadrian struct ieee80211_frame *wh; 1477227364Sadrian u_int subtype, flags; 1478218065Sadrian HAL_PKT_TYPE atype; 1479218065Sadrian const HAL_RATE_TABLE *rt; 1480218065Sadrian HAL_BOOL shortPreamble; 1481218065Sadrian struct ath_node *an; 1482218065Sadrian u_int pri; 1483218065Sadrian 1484236880Sadrian /* 1485236880Sadrian * To ensure that both sequence numbers and the CCMP PN handling 1486236880Sadrian * is "correct", make sure that the relevant TID queue is locked. 1487236880Sadrian * Otherwise the CCMP PN and seqno may appear out of order, causing 1488236880Sadrian * re-ordered frames to have out of order CCMP PN's, resulting 1489236880Sadrian * in many, many frame drops. 1490236880Sadrian */ 1491243786Sadrian ATH_TX_LOCK_ASSERT(sc); 1492236880Sadrian 1493218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1494218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1495218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1496218065Sadrian isfrag = m0->m_flags & M_FRAG; 1497218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1498218065Sadrian /* 1499218065Sadrian * Packet length must not include any 1500218065Sadrian * pad bytes; deduct them here. 1501218065Sadrian */ 1502218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1503218065Sadrian 1504218154Sadrian /* Handle encryption twiddling if needed */ 1505227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1506227364Sadrian &pktlen, &keyix)) { 1507218154Sadrian ath_freetx(m0); 1508218154Sadrian return EIO; 1509218154Sadrian } 1510218065Sadrian 1511218154Sadrian /* packet header may have moved, reset our local pointer */ 1512218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1513218065Sadrian 1514218065Sadrian pktlen += IEEE80211_CRC_LEN; 1515218065Sadrian 1516218065Sadrian /* 1517218065Sadrian * Load the DMA map so any coalescing is done. This 1518218065Sadrian * also calculates the number of descriptors we need. 1519218065Sadrian */ 1520218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1521218065Sadrian if (error != 0) 1522218065Sadrian return error; 1523218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1524218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1525218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1526218065Sadrian 1527218065Sadrian /* setup descriptors */ 1528218065Sadrian ds = bf->bf_desc; 1529218065Sadrian rt = sc->sc_currates; 1530218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1531218065Sadrian 1532218065Sadrian /* 1533218065Sadrian * NB: the 802.11 layer marks whether or not we should 1534218065Sadrian * use short preamble based on the current mode and 1535218065Sadrian * negotiated parameters. 1536218065Sadrian */ 1537218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1538218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1539218065Sadrian shortPreamble = AH_TRUE; 1540218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1541218065Sadrian } else { 1542218065Sadrian shortPreamble = AH_FALSE; 1543218065Sadrian } 1544218065Sadrian 1545218065Sadrian an = ATH_NODE(ni); 1546240724Sadrian //flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1547240724Sadrian flags = 0; 1548218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1549218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1550218065Sadrian /* XXX use txparams instead of fixed values */ 1551218065Sadrian /* 1552218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1553218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1554218065Sadrian */ 1555218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1556218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1557218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1558218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1559218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1560218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1561218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1562218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1563218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1564218065Sadrian else 1565218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1566218065Sadrian rix = an->an_mgmtrix; 1567218065Sadrian txrate = rt->info[rix].rateCode; 1568218065Sadrian if (shortPreamble) 1569218065Sadrian txrate |= rt->info[rix].shortPreamble; 1570218065Sadrian try0 = ATH_TXMGTTRY; 1571218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1572218065Sadrian break; 1573218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1574218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1575218065Sadrian rix = an->an_mgmtrix; 1576218065Sadrian txrate = rt->info[rix].rateCode; 1577218065Sadrian if (shortPreamble) 1578218065Sadrian txrate |= rt->info[rix].shortPreamble; 1579218065Sadrian try0 = ATH_TXMGTTRY; 1580218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1581218065Sadrian break; 1582218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1583218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1584218065Sadrian /* 1585218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1586218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1587218065Sadrian * the rate control module for the rate to use. 1588218065Sadrian */ 1589218065Sadrian if (ismcast) { 1590218065Sadrian rix = an->an_mcastrix; 1591218065Sadrian txrate = rt->info[rix].rateCode; 1592218065Sadrian if (shortPreamble) 1593218065Sadrian txrate |= rt->info[rix].shortPreamble; 1594218065Sadrian try0 = 1; 1595218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1596218065Sadrian /* XXX? maybe always use long preamble? */ 1597218065Sadrian rix = an->an_mgmtrix; 1598218065Sadrian txrate = rt->info[rix].rateCode; 1599218065Sadrian if (shortPreamble) 1600218065Sadrian txrate |= rt->info[rix].shortPreamble; 1601218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1602218065Sadrian } else { 1603227364Sadrian /* 1604227364Sadrian * Do rate lookup on each TX, rather than using 1605227364Sadrian * the hard-coded TX information decided here. 1606227364Sadrian */ 1607227364Sadrian ismrr = 1; 1608227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1609218065Sadrian } 1610218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1611218065Sadrian flags |= HAL_TXDESC_NOACK; 1612218065Sadrian break; 1613218065Sadrian default: 1614218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1615218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1616218065Sadrian /* XXX statistic */ 1617218065Sadrian ath_freetx(m0); 1618218065Sadrian return EIO; 1619218065Sadrian } 1620218065Sadrian 1621237041Sadrian /* 1622237041Sadrian * There are two known scenarios where the frame AC doesn't match 1623237041Sadrian * what the destination TXQ is. 1624237041Sadrian * 1625237041Sadrian * + non-QoS frames (eg management?) that the net80211 stack has 1626237041Sadrian * assigned a higher AC to, but since it's a non-QoS TID, it's 1627237041Sadrian * being thrown into TID 16. TID 16 gets the AC_BE queue. 1628237041Sadrian * It's quite possible that management frames should just be 1629237041Sadrian * direct dispatched to hardware rather than go via the software 1630237041Sadrian * queue; that should be investigated in the future. There are 1631237041Sadrian * some specific scenarios where this doesn't make sense, mostly 1632237041Sadrian * surrounding ADDBA request/response - hence why that is special 1633237041Sadrian * cased. 1634237041Sadrian * 1635237041Sadrian * + Multicast frames going into the VAP mcast queue. That shows up 1636237041Sadrian * as "TXQ 11". 1637237041Sadrian * 1638237041Sadrian * This driver should eventually support separate TID and TXQ locking, 1639237041Sadrian * allowing for arbitrary AC frames to appear on arbitrary software 1640237041Sadrian * queues, being queued to the "correct" hardware queue when needed. 1641237041Sadrian */ 1642237041Sadrian#if 0 1643235750Sadrian if (txq != sc->sc_ac2q[pri]) { 1644235750Sadrian device_printf(sc->sc_dev, 1645235750Sadrian "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n", 1646235750Sadrian __func__, 1647235750Sadrian txq, 1648235750Sadrian txq->axq_qnum, 1649235750Sadrian pri, 1650235750Sadrian sc->sc_ac2q[pri], 1651235750Sadrian sc->sc_ac2q[pri]->axq_qnum); 1652235750Sadrian } 1653237041Sadrian#endif 1654235750Sadrian 1655218065Sadrian /* 1656218065Sadrian * Calculate miscellaneous flags. 1657218065Sadrian */ 1658218065Sadrian if (ismcast) { 1659218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1660218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1661218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1662218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1663218065Sadrian sc->sc_stats.ast_tx_rts++; 1664218065Sadrian } 1665218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1666218065Sadrian sc->sc_stats.ast_tx_noack++; 1667218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1668218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1669218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1670218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1671218065Sadrian sc->sc_stats.ast_tdma_ack++; 1672218065Sadrian ath_freetx(m0); 1673218065Sadrian return EIO; 1674218065Sadrian } 1675218065Sadrian#endif 1676218065Sadrian 1677218065Sadrian /* 1678227364Sadrian * Determine if a tx interrupt should be generated for 1679227364Sadrian * this descriptor. We take a tx interrupt to reap 1680227364Sadrian * descriptors when the h/w hits an EOL condition or 1681227364Sadrian * when the descriptor is specifically marked to generate 1682227364Sadrian * an interrupt. We periodically mark descriptors in this 1683227364Sadrian * way to insure timely replenishing of the supply needed 1684227364Sadrian * for sending frames. Defering interrupts reduces system 1685227364Sadrian * load and potentially allows more concurrent work to be 1686227364Sadrian * done but if done to aggressively can cause senders to 1687227364Sadrian * backup. 1688227364Sadrian * 1689227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1690227364Sadrian * dynamically through sysctl. 1691218065Sadrian */ 1692227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1693227364Sadrian txq->axq_intrcnt = 0; 1694227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1695227364Sadrian flags |= HAL_TXDESC_INTREQ; 1696227364Sadrian txq->axq_intrcnt = 0; 1697227364Sadrian } 1698218932Sadrian 1699227364Sadrian /* This point forward is actual TX bits */ 1700218065Sadrian 1701218065Sadrian /* 1702218065Sadrian * At this point we are committed to sending the frame 1703218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1704218065Sadrian * case this frame is part of frag chain. 1705218065Sadrian */ 1706218065Sadrian m0->m_nextpkt = NULL; 1707218065Sadrian 1708218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1709218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1710218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1711218065Sadrian 1712218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1713218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1714218065Sadrian 1715218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1716218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1717218065Sadrian if (iswep) 1718218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1719218065Sadrian if (isfrag) 1720218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1721218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1722218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1723218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1724218065Sadrian 1725218065Sadrian ieee80211_radiotap_tx(vap, m0); 1726218065Sadrian } 1727218065Sadrian 1728227364Sadrian /* Blank the legacy rate array */ 1729227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1730227364Sadrian 1731218065Sadrian /* 1732227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1733227364Sadrian * the rate scenario. 1734227364Sadrian */ 1735227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1736227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1737227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1738227364Sadrian 1739227364Sadrian /* Store the decided rate index values away */ 1740227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1741227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1742227364Sadrian bf->bf_state.bfs_atype = atype; 1743227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1744227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1745227364Sadrian bf->bf_state.bfs_try0 = try0; 1746227364Sadrian bf->bf_state.bfs_keyix = keyix; 1747227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1748233966Sadrian bf->bf_state.bfs_txflags = flags; 1749227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1750227364Sadrian 1751227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1752227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1753227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1754227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1755227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1756227364Sadrian 1757227364Sadrian return 0; 1758227364Sadrian} 1759227364Sadrian 1760227364Sadrian/* 1761240724Sadrian * Queue a frame to the hardware or software queue. 1762227364Sadrian * 1763227364Sadrian * This can be called by the net80211 code. 1764227364Sadrian * 1765227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1766227364Sadrian * XXX aggregate scheduler so its serialised? 1767240724Sadrian * 1768240724Sadrian * XXX When sending management frames via ath_raw_xmit(), 1769240724Sadrian * should CLRDMASK be set unconditionally? 1770227364Sadrian */ 1771227364Sadrianint 1772227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1773227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1774227364Sadrian{ 1775227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1776227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1777232764Sadrian int r = 0; 1778227364Sadrian u_int pri; 1779227364Sadrian int tid; 1780227364Sadrian struct ath_txq *txq; 1781227364Sadrian int ismcast; 1782227364Sadrian const struct ieee80211_frame *wh; 1783227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1784236872Sadrian ieee80211_seq seqno; 1785227364Sadrian uint8_t type, subtype; 1786227364Sadrian 1787243786Sadrian ATH_TX_LOCK_ASSERT(sc); 1788243786Sadrian 1789227364Sadrian /* 1790227364Sadrian * Determine the target hardware queue. 1791218065Sadrian * 1792234009Sadrian * For multicast frames, the txq gets overridden appropriately 1793234009Sadrian * depending upon the state of PS. 1794227364Sadrian * 1795227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1796227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1797227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1798227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1799227364Sadrian * having a node TID queued to multiple hardware TXQs. 1800227364Sadrian * This may change in the future but would require some locking 1801227364Sadrian * fudgery. 1802218065Sadrian */ 1803227364Sadrian pri = ath_tx_getac(sc, m0); 1804227364Sadrian tid = ath_tx_gettid(sc, m0); 1805218065Sadrian 1806227364Sadrian txq = sc->sc_ac2q[pri]; 1807227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1808227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1809227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1810227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1811227364Sadrian 1812232764Sadrian /* 1813232764Sadrian * Enforce how deep the multicast queue can grow. 1814232764Sadrian * 1815232764Sadrian * XXX duplicated in ath_raw_xmit(). 1816232764Sadrian */ 1817232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1818232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1819232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1820232764Sadrian r = ENOBUFS; 1821232764Sadrian } 1822232764Sadrian if (r != 0) { 1823232764Sadrian m_freem(m0); 1824232764Sadrian return r; 1825232764Sadrian } 1826232764Sadrian } 1827232764Sadrian 1828227364Sadrian /* A-MPDU TX */ 1829227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1830227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1831227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1832227364Sadrian 1833236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1834236872Sadrian __func__, tid, pri, is_ampdu); 1835227364Sadrian 1836239051Sadrian /* Set local packet state, used to queue packets to hardware */ 1837239051Sadrian bf->bf_state.bfs_tid = tid; 1838244109Sadrian bf->bf_state.bfs_tx_queue = txq->axq_qnum; 1839239051Sadrian bf->bf_state.bfs_pri = pri; 1840239051Sadrian 1841248671Sadrian#if 1 1842232753Sadrian /* 1843234009Sadrian * When servicing one or more stations in power-save mode 1844234009Sadrian * (or) if there is some mcast data waiting on the mcast 1845234009Sadrian * queue (to prevent out of order delivery) multicast frames 1846234009Sadrian * must be bufferd until after the beacon. 1847234009Sadrian * 1848234009Sadrian * TODO: we should lock the mcastq before we check the length. 1849232753Sadrian */ 1850248671Sadrian if (sc->sc_cabq_enable && ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) { 1851227364Sadrian txq = &avp->av_mcastq; 1852239051Sadrian /* 1853239051Sadrian * Mark the frame as eventually belonging on the CAB 1854239051Sadrian * queue, so the descriptor setup functions will 1855239051Sadrian * correctly initialise the descriptor 'qcuId' field. 1856239051Sadrian */ 1857244109Sadrian bf->bf_state.bfs_tx_queue = sc->sc_cabq->axq_qnum; 1858239051Sadrian } 1859248671Sadrian#endif 1860227364Sadrian 1861227364Sadrian /* Do the generic frame setup */ 1862227364Sadrian /* XXX should just bzero the bf_state? */ 1863227364Sadrian bf->bf_state.bfs_dobaw = 0; 1864227364Sadrian 1865227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1866236880Sadrian /* 1867236880Sadrian * Don't do it whilst pending; the net80211 layer still 1868236880Sadrian * assigns them. 1869236880Sadrian */ 1870227364Sadrian if (is_ampdu_tx) { 1871227364Sadrian /* 1872227364Sadrian * Always call; this function will 1873227364Sadrian * handle making sure that null data frames 1874227364Sadrian * don't get a sequence number from the current 1875227364Sadrian * TID and thus mess with the BAW. 1876227364Sadrian */ 1877236872Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1878236874Sadrian 1879236874Sadrian /* 1880236874Sadrian * Don't add QoS NULL frames to the BAW. 1881236874Sadrian */ 1882236872Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1883236872Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1884227364Sadrian bf->bf_state.bfs_dobaw = 1; 1885227364Sadrian } 1886218240Sadrian } 1887218240Sadrian 1888218065Sadrian /* 1889227364Sadrian * If needed, the sequence number has been assigned. 1890227364Sadrian * Squirrel it away somewhere easy to get to. 1891218065Sadrian */ 1892236872Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1893227364Sadrian 1894227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1895227364Sadrian if (is_ampdu_pending) 1896227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1897227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1898227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1899227364Sadrian 1900227364Sadrian /* This also sets up the DMA map */ 1901234009Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0, txq); 1902227364Sadrian 1903227364Sadrian if (r != 0) 1904236880Sadrian goto done; 1905227364Sadrian 1906227364Sadrian /* At this point m0 could have changed! */ 1907227364Sadrian m0 = bf->bf_m; 1908227364Sadrian 1909227364Sadrian#if 1 1910218065Sadrian /* 1911227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1912227364Sadrian * destination hardware queue. Don't bother software 1913227364Sadrian * queuing it. 1914218065Sadrian */ 1915227364Sadrian /* 1916227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1917227364Sadrian * destination hardware queue. Don't bother software 1918227364Sadrian * queuing it, as the TID will now be paused. 1919227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1920227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1921227364Sadrian * It queues directly to hardware because the TID is paused 1922227364Sadrian * at this point (and won't be unpaused until the BAR has 1923227364Sadrian * either been TXed successfully or max retries has been 1924227364Sadrian * reached.) 1925227364Sadrian */ 1926227364Sadrian if (txq == &avp->av_mcastq) { 1927235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1928233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1929240724Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 1930227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1931227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1932227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1933235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1934227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1935240724Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 1936227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1937227364Sadrian } else { 1938227364Sadrian /* add to software queue */ 1939235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1940233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1941227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1942227364Sadrian } 1943227364Sadrian#else 1944227364Sadrian /* 1945227364Sadrian * For now, since there's no software queue, 1946227364Sadrian * direct-dispatch to the hardware. 1947227364Sadrian */ 1948240724Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 1949227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1950236880Sadrian#endif 1951236880Sadriandone: 1952218065Sadrian return 0; 1953218065Sadrian} 1954218065Sadrian 1955218065Sadrianstatic int 1956218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1957218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1958218065Sadrian const struct ieee80211_bpf_params *params) 1959218065Sadrian{ 1960218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1961218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1962218065Sadrian struct ath_hal *ah = sc->sc_ah; 1963218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1964218065Sadrian int error, ismcast, ismrr; 1965218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1966227364Sadrian u_int8_t rix, txrate; 1967218065Sadrian struct ieee80211_frame *wh; 1968227364Sadrian u_int flags; 1969218065Sadrian HAL_PKT_TYPE atype; 1970218065Sadrian const HAL_RATE_TABLE *rt; 1971218065Sadrian struct ath_desc *ds; 1972218065Sadrian u_int pri; 1973227364Sadrian int o_tid = -1; 1974227364Sadrian int do_override; 1975218065Sadrian 1976243786Sadrian ATH_TX_LOCK_ASSERT(sc); 1977243786Sadrian 1978218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1979218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1980218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1981218065Sadrian /* 1982218065Sadrian * Packet length must not include any 1983218065Sadrian * pad bytes; deduct them here. 1984218065Sadrian */ 1985218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1986218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1987218065Sadrian 1988240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 2, 1989240899Sadrian "ath_tx_raw_start: ni=%p, bf=%p, raw", ni, bf); 1990240899Sadrian 1991227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1992227364Sadrian __func__, ismcast); 1993227364Sadrian 1994236880Sadrian pri = params->ibp_pri & 3; 1995236880Sadrian /* Override pri if the frame isn't a QoS one */ 1996236880Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1997236880Sadrian pri = ath_tx_getac(sc, m0); 1998236880Sadrian 1999236880Sadrian /* XXX If it's an ADDBA, override the correct queue */ 2000236880Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 2001236880Sadrian 2002236880Sadrian /* Map ADDBA to the correct priority */ 2003236880Sadrian if (do_override) { 2004236880Sadrian#if 0 2005236880Sadrian device_printf(sc->sc_dev, 2006236880Sadrian "%s: overriding tid %d pri %d -> %d\n", 2007236880Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 2008236880Sadrian#endif 2009236880Sadrian pri = TID_TO_WME_AC(o_tid); 2010236880Sadrian } 2011236880Sadrian 2012218154Sadrian /* Handle encryption twiddling if needed */ 2013227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 2014227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 2015227364Sadrian &hdrlen, &pktlen, &keyix)) { 2016218154Sadrian ath_freetx(m0); 2017218154Sadrian return EIO; 2018218154Sadrian } 2019218154Sadrian /* packet header may have moved, reset our local pointer */ 2020218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 2021218065Sadrian 2022227364Sadrian /* Do the generic frame setup */ 2023227364Sadrian /* XXX should just bzero the bf_state? */ 2024227364Sadrian bf->bf_state.bfs_dobaw = 0; 2025227364Sadrian 2026218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 2027218065Sadrian if (error != 0) 2028218065Sadrian return error; 2029218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 2030218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 2031218065Sadrian bf->bf_node = ni; /* NB: held reference */ 2032218065Sadrian 2033240724Sadrian /* Always enable CLRDMASK for raw frames for now.. */ 2034218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 2035218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 2036218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 2037218065Sadrian flags |= HAL_TXDESC_RTSENA; 2038227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 2039227364Sadrian /* XXX assume 11g/11n protection? */ 2040227364Sadrian bf->bf_state.bfs_doprot = 1; 2041218065Sadrian flags |= HAL_TXDESC_CTSENA; 2042227364Sadrian } 2043218065Sadrian /* XXX leave ismcast to injector? */ 2044218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 2045218065Sadrian flags |= HAL_TXDESC_NOACK; 2046218065Sadrian 2047218065Sadrian rt = sc->sc_currates; 2048218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 2049218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 2050218065Sadrian txrate = rt->info[rix].rateCode; 2051218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 2052218065Sadrian txrate |= rt->info[rix].shortPreamble; 2053218065Sadrian sc->sc_txrix = rix; 2054218065Sadrian try0 = params->ibp_try0; 2055218065Sadrian ismrr = (params->ibp_try1 != 0); 2056218065Sadrian txantenna = params->ibp_pri >> 2; 2057218065Sadrian if (txantenna == 0) /* XXX? */ 2058218065Sadrian txantenna = sc->sc_txantenna; 2059218157Sadrian 2060227364Sadrian /* 2061227364Sadrian * Since ctsrate is fixed, store it away for later 2062227364Sadrian * use when the descriptor fields are being set. 2063227364Sadrian */ 2064227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 2065227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 2066218157Sadrian 2067218065Sadrian /* 2068218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 2069218065Sadrian * set the sequence number, duration, etc. 2070218065Sadrian */ 2071218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 2072218065Sadrian 2073218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 2074218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 2075218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 2076218065Sadrian 2077218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 2078218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 2079218065Sadrian 2080218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 2081218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 2082218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 2083218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 2084218065Sadrian if (m0->m_flags & M_FRAG) 2085218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 2086218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 2087218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 2088218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 2089218065Sadrian 2090218065Sadrian ieee80211_radiotap_tx(vap, m0); 2091218065Sadrian } 2092218065Sadrian 2093218065Sadrian /* 2094218065Sadrian * Formulate first tx descriptor with tx controls. 2095218065Sadrian */ 2096218065Sadrian ds = bf->bf_desc; 2097218065Sadrian /* XXX check return value? */ 2098227364Sadrian 2099227364Sadrian /* Store the decided rate index values away */ 2100227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 2101227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 2102227364Sadrian bf->bf_state.bfs_atype = atype; 2103227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 2104227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 2105227364Sadrian bf->bf_state.bfs_try0 = try0; 2106227364Sadrian bf->bf_state.bfs_keyix = keyix; 2107227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 2108233966Sadrian bf->bf_state.bfs_txflags = flags; 2109227364Sadrian bf->bf_state.bfs_shpream = 2110227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 2111218065Sadrian 2112239051Sadrian /* Set local packet state, used to queue packets to hardware */ 2113239051Sadrian bf->bf_state.bfs_tid = WME_AC_TO_TID(pri); 2114244109Sadrian bf->bf_state.bfs_tx_queue = sc->sc_ac2q[pri]->axq_qnum; 2115239051Sadrian bf->bf_state.bfs_pri = pri; 2116239051Sadrian 2117227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 2118227364Sadrian bf->bf_state.bfs_ctsrate = 0; 2119227364Sadrian bf->bf_state.bfs_ctsduration = 0; 2120227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 2121218240Sadrian 2122227364Sadrian /* Blank the legacy rate array */ 2123227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 2124218240Sadrian 2125227364Sadrian bf->bf_state.bfs_rc[0].rix = 2126227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 2127227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 2128227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 2129227364Sadrian 2130227364Sadrian if (ismrr) { 2131227364Sadrian int rix; 2132227364Sadrian 2133227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 2134227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 2135227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 2136227364Sadrian 2137227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 2138227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 2139227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 2140227364Sadrian 2141227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 2142227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 2143227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 2144218065Sadrian } 2145227364Sadrian /* 2146227364Sadrian * All the required rate control decisions have been made; 2147227364Sadrian * fill in the rc flags. 2148227364Sadrian */ 2149227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2150218065Sadrian 2151227364Sadrian /* NB: no buffered multicast in power save support */ 2152227364Sadrian 2153227364Sadrian /* 2154227364Sadrian * If we're overiding the ADDBA destination, dump directly 2155227364Sadrian * into the hardware queue, right after any pending 2156227364Sadrian * frames to that node are. 2157227364Sadrian */ 2158227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 2159227364Sadrian __func__, do_override); 2160227364Sadrian 2161240882Sadrian#if 1 2162227364Sadrian if (do_override) { 2163240724Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 2164227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 2165227364Sadrian } else { 2166227364Sadrian /* Queue to software queue */ 2167227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 2168227364Sadrian } 2169240882Sadrian#else 2170240882Sadrian /* Direct-dispatch to the hardware */ 2171240882Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 2172240882Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 2173240882Sadrian#endif 2174218065Sadrian return 0; 2175218065Sadrian} 2176218065Sadrian 2177227364Sadrian/* 2178227364Sadrian * Send a raw frame. 2179227364Sadrian * 2180227364Sadrian * This can be called by net80211. 2181227364Sadrian */ 2182218065Sadrianint 2183218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2184218065Sadrian const struct ieee80211_bpf_params *params) 2185218065Sadrian{ 2186218065Sadrian struct ieee80211com *ic = ni->ni_ic; 2187218065Sadrian struct ifnet *ifp = ic->ic_ifp; 2188218065Sadrian struct ath_softc *sc = ifp->if_softc; 2189218065Sadrian struct ath_buf *bf; 2190232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 2191232764Sadrian int error = 0; 2192218065Sadrian 2193227651Sadrian ATH_PCU_LOCK(sc); 2194227651Sadrian if (sc->sc_inreset_cnt > 0) { 2195227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 2196227651Sadrian __func__); 2197227651Sadrian error = EIO; 2198227651Sadrian ATH_PCU_UNLOCK(sc); 2199227651Sadrian goto bad0; 2200227651Sadrian } 2201227651Sadrian sc->sc_txstart_cnt++; 2202227651Sadrian ATH_PCU_UNLOCK(sc); 2203227651Sadrian 2204242391Sadrian ATH_TX_LOCK(sc); 2205242391Sadrian 2206218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 2207218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 2208218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 2209218065Sadrian "!running" : "invalid"); 2210218065Sadrian m_freem(m); 2211218065Sadrian error = ENETDOWN; 2212218065Sadrian goto bad; 2213218065Sadrian } 2214232764Sadrian 2215218065Sadrian /* 2216232764Sadrian * Enforce how deep the multicast queue can grow. 2217232764Sadrian * 2218232764Sadrian * XXX duplicated in ath_tx_start(). 2219232764Sadrian */ 2220232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2221232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 2222232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 2223232764Sadrian error = ENOBUFS; 2224232764Sadrian } 2225232764Sadrian 2226232764Sadrian if (error != 0) { 2227232764Sadrian m_freem(m); 2228232764Sadrian goto bad; 2229232764Sadrian } 2230232764Sadrian } 2231232764Sadrian 2232232764Sadrian /* 2233218065Sadrian * Grab a TX buffer and associated resources. 2234218065Sadrian */ 2235237000Sadrian bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 2236218065Sadrian if (bf == NULL) { 2237218065Sadrian sc->sc_stats.ast_tx_nobuf++; 2238218065Sadrian m_freem(m); 2239218065Sadrian error = ENOBUFS; 2240218065Sadrian goto bad; 2241218065Sadrian } 2242240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: m=%p, params=%p, bf=%p\n", 2243240899Sadrian m, params, bf); 2244218065Sadrian 2245218065Sadrian if (params == NULL) { 2246218065Sadrian /* 2247218065Sadrian * Legacy path; interpret frame contents to decide 2248218065Sadrian * precisely how to send the frame. 2249218065Sadrian */ 2250218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 2251218065Sadrian error = EIO; /* XXX */ 2252218065Sadrian goto bad2; 2253218065Sadrian } 2254218065Sadrian } else { 2255218065Sadrian /* 2256218065Sadrian * Caller supplied explicit parameters to use in 2257218065Sadrian * sending the frame. 2258218065Sadrian */ 2259218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 2260218065Sadrian error = EIO; /* XXX */ 2261218065Sadrian goto bad2; 2262218065Sadrian } 2263218065Sadrian } 2264218065Sadrian sc->sc_wd_timer = 5; 2265218065Sadrian ifp->if_opackets++; 2266218065Sadrian sc->sc_stats.ast_tx_raw++; 2267218065Sadrian 2268242271Sadrian /* 2269242271Sadrian * Update the TIM - if there's anything queued to the 2270242271Sadrian * software queue and power save is enabled, we should 2271242271Sadrian * set the TIM. 2272242271Sadrian */ 2273242271Sadrian ath_tx_update_tim(sc, ni, 1); 2274242271Sadrian 2275243787Sadrian ATH_TX_UNLOCK(sc); 2276243787Sadrian 2277227651Sadrian ATH_PCU_LOCK(sc); 2278227651Sadrian sc->sc_txstart_cnt--; 2279227651Sadrian ATH_PCU_UNLOCK(sc); 2280227651Sadrian 2281218065Sadrian return 0; 2282218065Sadrianbad2: 2283240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: bad2: m=%p, params=%p, " 2284240899Sadrian "bf=%p", 2285240899Sadrian m, 2286240899Sadrian params, 2287240899Sadrian bf); 2288218065Sadrian ATH_TXBUF_LOCK(sc); 2289236993Sadrian ath_returnbuf_head(sc, bf); 2290218065Sadrian ATH_TXBUF_UNLOCK(sc); 2291218065Sadrianbad: 2292242391Sadrian 2293242391Sadrian ATH_TX_UNLOCK(sc); 2294242391Sadrian 2295227651Sadrian ATH_PCU_LOCK(sc); 2296227651Sadrian sc->sc_txstart_cnt--; 2297227651Sadrian ATH_PCU_UNLOCK(sc); 2298227651Sadrianbad0: 2299240899Sadrian ATH_KTR(sc, ATH_KTR_TX, 2, "ath_raw_xmit: bad0: m=%p, params=%p", 2300240899Sadrian m, params); 2301218065Sadrian ifp->if_oerrors++; 2302218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 2303218065Sadrian ieee80211_free_node(ni); 2304227651Sadrian 2305218065Sadrian return error; 2306218065Sadrian} 2307227364Sadrian 2308227364Sadrian/* Some helper functions */ 2309227364Sadrian 2310227364Sadrian/* 2311227364Sadrian * ADDBA (and potentially others) need to be placed in the same 2312227364Sadrian * hardware queue as the TID/node it's relating to. This is so 2313227364Sadrian * it goes out after any pending non-aggregate frames to the 2314227364Sadrian * same node/TID. 2315227364Sadrian * 2316227364Sadrian * If this isn't done, the ADDBA can go out before the frames 2317227364Sadrian * queued in hardware. Even though these frames have a sequence 2318227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 2319227364Sadrian * no frames whose sequence numbers are after the ADDBA should 2320227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 2321227364Sadrian * will simply drop them as being out of the BAW. 2322227364Sadrian * 2323227364Sadrian * The frames can't be appended to the TID software queue - it'll 2324227364Sadrian * never be sent out. So these frames have to be directly 2325227364Sadrian * dispatched to the hardware, rather than queued in software. 2326227364Sadrian * So if this function returns true, the TXQ has to be 2327227364Sadrian * overridden and it has to be directly dispatched. 2328227364Sadrian * 2329227364Sadrian * It's a dirty hack, but someone's gotta do it. 2330227364Sadrian */ 2331227364Sadrian 2332227364Sadrian/* 2333227364Sadrian * XXX doesn't belong here! 2334227364Sadrian */ 2335227364Sadrianstatic int 2336227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 2337227364Sadrian{ 2338227364Sadrian /* Type: Management frame? */ 2339227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 2340227364Sadrian IEEE80211_FC0_TYPE_MGT) 2341227364Sadrian return 0; 2342227364Sadrian 2343227364Sadrian /* Subtype: Action frame? */ 2344227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 2345227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 2346227364Sadrian return 0; 2347227364Sadrian 2348227364Sadrian return 1; 2349227364Sadrian} 2350227364Sadrian 2351227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 2352227364Sadrian/* 2353227364Sadrian * Return an alternate TID for ADDBA request frames. 2354227364Sadrian * 2355227364Sadrian * Yes, this likely should be done in the net80211 layer. 2356227364Sadrian */ 2357227364Sadrianstatic int 2358227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 2359227364Sadrian struct ieee80211_node *ni, 2360227364Sadrian struct mbuf *m0, int *tid) 2361227364Sadrian{ 2362227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 2363227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 2364227364Sadrian uint8_t *frm; 2365227364Sadrian uint16_t baparamset; 2366227364Sadrian 2367227364Sadrian /* Not action frame? Bail */ 2368227364Sadrian if (! ieee80211_is_action(wh)) 2369227364Sadrian return 0; 2370227364Sadrian 2371227364Sadrian /* XXX Not needed for frames we send? */ 2372227364Sadrian#if 0 2373227364Sadrian /* Correct length? */ 2374227364Sadrian if (! ieee80211_parse_action(ni, m)) 2375227364Sadrian return 0; 2376227364Sadrian#endif 2377227364Sadrian 2378227364Sadrian /* Extract out action frame */ 2379227364Sadrian frm = (u_int8_t *)&wh[1]; 2380227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 2381227364Sadrian 2382227364Sadrian /* Not ADDBA? Bail */ 2383227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 2384227364Sadrian return 0; 2385227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 2386227364Sadrian return 0; 2387227364Sadrian 2388227364Sadrian /* Extract TID, return it */ 2389227364Sadrian baparamset = le16toh(ia->rq_baparamset); 2390227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 2391227364Sadrian 2392227364Sadrian return 1; 2393227364Sadrian} 2394227364Sadrian#undef MS 2395227364Sadrian 2396227364Sadrian/* Per-node software queue operations */ 2397227364Sadrian 2398227364Sadrian/* 2399227364Sadrian * Add the current packet to the given BAW. 2400227364Sadrian * It is assumed that the current packet 2401227364Sadrian * 2402227364Sadrian * + fits inside the BAW; 2403227364Sadrian * + already has had a sequence number allocated. 2404227364Sadrian * 2405227364Sadrian * Since the BAW status may be modified by both the ath task and 2406227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2407227364Sadrian */ 2408227364Sadrianvoid 2409227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 2410227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 2411227364Sadrian{ 2412227364Sadrian int index, cindex; 2413227364Sadrian struct ieee80211_tx_ampdu *tap; 2414227364Sadrian 2415243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2416227364Sadrian 2417227364Sadrian if (bf->bf_state.bfs_isretried) 2418227364Sadrian return; 2419227364Sadrian 2420236886Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2421236886Sadrian 2422236880Sadrian if (! bf->bf_state.bfs_dobaw) { 2423236880Sadrian device_printf(sc->sc_dev, 2424236880Sadrian "%s: dobaw=0, seqno=%d, window %d:%d\n", 2425236880Sadrian __func__, 2426236880Sadrian SEQNO(bf->bf_state.bfs_seqno), 2427236880Sadrian tap->txa_start, 2428236880Sadrian tap->txa_wnd); 2429236880Sadrian } 2430236880Sadrian 2431227364Sadrian if (bf->bf_state.bfs_addedbaw) 2432227364Sadrian device_printf(sc->sc_dev, 2433236872Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 2434229949Sadrian "baw head=%d tail=%d\n", 2435236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2436229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2437229949Sadrian tid->baw_tail); 2438227364Sadrian 2439227364Sadrian /* 2440236880Sadrian * Verify that the given sequence number is not outside of the 2441236880Sadrian * BAW. Complain loudly if that's the case. 2442236880Sadrian */ 2443236880Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2444236880Sadrian SEQNO(bf->bf_state.bfs_seqno))) { 2445236880Sadrian device_printf(sc->sc_dev, 2446236880Sadrian "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; " 2447236880Sadrian "baw head=%d tail=%d\n", 2448236880Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2449236880Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2450236880Sadrian tid->baw_tail); 2451236880Sadrian } 2452236880Sadrian 2453236880Sadrian /* 2454227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2455227364Sadrian * the txa state contains the current baw start. 2456227364Sadrian */ 2457227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2458227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2459227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2460236872Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2461229949Sadrian "baw head=%d tail=%d\n", 2462236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2463229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2464229949Sadrian tid->baw_tail); 2465227364Sadrian 2466227364Sadrian 2467227364Sadrian#if 0 2468227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2469227364Sadrian#endif 2470227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2471227364Sadrian device_printf(sc->sc_dev, 2472227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2473227364Sadrian "head=%d, tail=%d)\n", 2474227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2475227364Sadrian device_printf(sc->sc_dev, 2476227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2477227364Sadrian __func__, 2478227364Sadrian tid->tx_buf[cindex], 2479227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2480227364Sadrian bf, 2481227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2482227364Sadrian ); 2483227364Sadrian } 2484227364Sadrian tid->tx_buf[cindex] = bf; 2485227364Sadrian 2486229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2487229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2488227364Sadrian tid->baw_tail = cindex; 2489227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2490227364Sadrian } 2491227364Sadrian} 2492227364Sadrian 2493227364Sadrian/* 2494227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2495227398Sadrian * 2496227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2497227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2498227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2499227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2500227398Sadrian * tracking array to maintain consistency. 2501227398Sadrian */ 2502227398Sadrianstatic void 2503227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2504227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2505227398Sadrian{ 2506227398Sadrian int index, cindex; 2507227398Sadrian struct ieee80211_tx_ampdu *tap; 2508227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2509227398Sadrian 2510243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2511227398Sadrian 2512227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2513227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2514227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2515227398Sadrian 2516227398Sadrian /* 2517227398Sadrian * Just warn for now; if it happens then we should find out 2518227398Sadrian * about it. It's highly likely the aggregation session will 2519227398Sadrian * soon hang. 2520227398Sadrian */ 2521227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2522227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2523227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2524227398Sadrian __func__); 2525227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2526227398Sadrian __func__, 2527227398Sadrian old_bf->bf_state.bfs_seqno, 2528227398Sadrian new_bf->bf_state.bfs_seqno); 2529227398Sadrian } 2530227398Sadrian 2531227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2532227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2533227398Sadrian " has m BA session may hang.\n", 2534227398Sadrian __func__); 2535227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2536227398Sadrian __func__, 2537227398Sadrian old_bf, new_bf); 2538227398Sadrian } 2539227398Sadrian 2540227398Sadrian tid->tx_buf[cindex] = new_bf; 2541227398Sadrian} 2542227398Sadrian 2543227398Sadrian/* 2544227364Sadrian * seq_start - left edge of BAW 2545227364Sadrian * seq_next - current/next sequence number to allocate 2546227364Sadrian * 2547227364Sadrian * Since the BAW status may be modified by both the ath task and 2548227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2549227364Sadrian */ 2550227364Sadrianstatic void 2551227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2552227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2553227364Sadrian{ 2554227364Sadrian int index, cindex; 2555227364Sadrian struct ieee80211_tx_ampdu *tap; 2556227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2557227364Sadrian 2558243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2559227364Sadrian 2560227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2561227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2562227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2563227364Sadrian 2564227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2565236872Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2566229949Sadrian "baw head=%d, tail=%d\n", 2567236872Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2568227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2569227364Sadrian 2570227364Sadrian /* 2571227364Sadrian * If this occurs then we have a big problem - something else 2572227364Sadrian * has slid tap->txa_start along without updating the BAW 2573227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2574227364Sadrian * completely busted. 2575227364Sadrian * 2576227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2577227364Sadrian * it's quite possible that a cloned buffer is making its way 2578227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2579227364Sadrian */ 2580227364Sadrian if (tid->tx_buf[cindex] != bf) { 2581227364Sadrian device_printf(sc->sc_dev, 2582227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2583227364Sadrian __func__, 2584227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2585227364Sadrian tid->tx_buf[cindex], 2586227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2587227364Sadrian } 2588227364Sadrian 2589227364Sadrian tid->tx_buf[cindex] = NULL; 2590227364Sadrian 2591229949Sadrian while (tid->baw_head != tid->baw_tail && 2592229949Sadrian !tid->tx_buf[tid->baw_head]) { 2593227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2594227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2595227364Sadrian } 2596229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2597229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2598227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2599227364Sadrian} 2600227364Sadrian 2601227364Sadrian/* 2602227364Sadrian * Mark the current node/TID as ready to TX. 2603227364Sadrian * 2604227364Sadrian * This is done to make it easy for the software scheduler to 2605227364Sadrian * find which nodes have data to send. 2606227364Sadrian * 2607227364Sadrian * The TXQ lock must be held. 2608227364Sadrian */ 2609227364Sadrianstatic void 2610227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2611227364Sadrian{ 2612227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2613227364Sadrian 2614243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2615227364Sadrian 2616227364Sadrian if (tid->paused) 2617227364Sadrian return; /* paused, can't schedule yet */ 2618227364Sadrian 2619227364Sadrian if (tid->sched) 2620227364Sadrian return; /* already scheduled */ 2621227364Sadrian 2622227364Sadrian tid->sched = 1; 2623227364Sadrian 2624227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2625227364Sadrian} 2626227364Sadrian 2627227364Sadrian/* 2628227364Sadrian * Mark the current node as no longer needing to be polled for 2629227364Sadrian * TX packets. 2630227364Sadrian * 2631227364Sadrian * The TXQ lock must be held. 2632227364Sadrian */ 2633227364Sadrianstatic void 2634227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2635227364Sadrian{ 2636227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2637227364Sadrian 2638243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2639227364Sadrian 2640227364Sadrian if (tid->sched == 0) 2641227364Sadrian return; 2642227364Sadrian 2643227364Sadrian tid->sched = 0; 2644227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2645227364Sadrian} 2646227364Sadrian 2647227364Sadrian/* 2648227364Sadrian * Assign a sequence number manually to the given frame. 2649227364Sadrian * 2650227364Sadrian * This should only be called for A-MPDU TX frames. 2651227364Sadrian */ 2652236872Sadrianstatic ieee80211_seq 2653227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2654227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2655227364Sadrian{ 2656227364Sadrian struct ieee80211_frame *wh; 2657227364Sadrian int tid, pri; 2658227364Sadrian ieee80211_seq seqno; 2659227364Sadrian uint8_t subtype; 2660227364Sadrian 2661227364Sadrian /* TID lookup */ 2662227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2663227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2664227364Sadrian tid = WME_AC_TO_TID(pri); 2665236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2666236872Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2667227364Sadrian 2668227364Sadrian /* XXX Is it a control frame? Ignore */ 2669227364Sadrian 2670227364Sadrian /* Does the packet require a sequence number? */ 2671227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2672227364Sadrian return -1; 2673227364Sadrian 2674243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2675236880Sadrian 2676227364Sadrian /* 2677227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2678227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2679227364Sadrian * 2680227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2681227364Sadrian * data frame sequence number in the aggregation state updates, so 2682227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2683227364Sadrian * RX side. 2684227364Sadrian */ 2685227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2686227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2687236880Sadrian /* XXX no locking for this TID? This is a bit of a problem. */ 2688227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2689227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2690227364Sadrian } else { 2691227364Sadrian /* Manually assign sequence number */ 2692227364Sadrian seqno = ni->ni_txseqs[tid]; 2693227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2694227364Sadrian } 2695227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2696227364Sadrian M_SEQNO_SET(m0, seqno); 2697227364Sadrian 2698227364Sadrian /* Return so caller can do something with it if needed */ 2699236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2700227364Sadrian return seqno; 2701227364Sadrian} 2702227364Sadrian 2703227364Sadrian/* 2704227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2705227364Sadrian * If the frame is out of BAW, queue. 2706227364Sadrian * Otherwise, schedule it as a single frame. 2707227364Sadrian */ 2708227364Sadrianstatic void 2709239051Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, 2710239051Sadrian struct ath_txq *txq, struct ath_buf *bf) 2711227364Sadrian{ 2712227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2713227364Sadrian struct ieee80211_tx_ampdu *tap; 2714227364Sadrian 2715243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2716227364Sadrian 2717227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2718227364Sadrian 2719227364Sadrian /* paused? queue */ 2720227364Sadrian if (tid->paused) { 2721241336Sadrian ATH_TID_INSERT_HEAD(tid, bf, bf_list); 2722233480Sadrian /* XXX don't sched - we're paused! */ 2723227364Sadrian return; 2724227364Sadrian } 2725227364Sadrian 2726227364Sadrian /* outside baw? queue */ 2727227364Sadrian if (bf->bf_state.bfs_dobaw && 2728227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2729227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2730241336Sadrian ATH_TID_INSERT_HEAD(tid, bf, bf_list); 2731227364Sadrian ath_tx_tid_sched(sc, tid); 2732227364Sadrian return; 2733227364Sadrian } 2734227364Sadrian 2735240180Sadrian /* 2736240180Sadrian * This is a temporary check and should be removed once 2737240180Sadrian * all the relevant code paths have been fixed. 2738240180Sadrian * 2739240180Sadrian * During aggregate retries, it's possible that the head 2740240180Sadrian * frame will fail (which has the bfs_aggr and bfs_nframes 2741240180Sadrian * fields set for said aggregate) and will be retried as 2742240180Sadrian * a single frame. In this instance, the values should 2743240180Sadrian * be reset or the completion code will get upset with you. 2744240180Sadrian */ 2745240180Sadrian if (bf->bf_state.bfs_aggr != 0 || bf->bf_state.bfs_nframes > 1) { 2746240180Sadrian device_printf(sc->sc_dev, "%s: bfs_aggr=%d, bfs_nframes=%d\n", 2747240180Sadrian __func__, 2748240180Sadrian bf->bf_state.bfs_aggr, 2749240180Sadrian bf->bf_state.bfs_nframes); 2750240180Sadrian bf->bf_state.bfs_aggr = 0; 2751240180Sadrian bf->bf_state.bfs_nframes = 1; 2752240180Sadrian } 2753240180Sadrian 2754240724Sadrian /* Update CLRDMASK just before this frame is queued */ 2755240724Sadrian ath_tx_update_clrdmask(sc, tid, bf); 2756240724Sadrian 2757227364Sadrian /* Direct dispatch to hardware */ 2758227364Sadrian ath_tx_do_ratelookup(sc, bf); 2759233989Sadrian ath_tx_calc_duration(sc, bf); 2760233989Sadrian ath_tx_calc_protection(sc, bf); 2761233989Sadrian ath_tx_set_rtscts(sc, bf); 2762227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2763227364Sadrian ath_tx_setds(sc, bf); 2764227364Sadrian 2765227364Sadrian /* Statistics */ 2766227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2767227364Sadrian 2768227364Sadrian /* Track per-TID hardware queue depth correctly */ 2769227364Sadrian tid->hwq_depth++; 2770227364Sadrian 2771227364Sadrian /* Add to BAW */ 2772227364Sadrian if (bf->bf_state.bfs_dobaw) { 2773227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2774227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2775227364Sadrian } 2776227364Sadrian 2777227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2778227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2779227364Sadrian 2780227364Sadrian /* Hand off to hardware */ 2781227364Sadrian ath_tx_handoff(sc, txq, bf); 2782227364Sadrian} 2783227364Sadrian 2784227364Sadrian/* 2785227364Sadrian * Attempt to send the packet. 2786227364Sadrian * If the queue isn't busy, direct-dispatch. 2787227364Sadrian * If the queue is busy enough, queue the given packet on the 2788227364Sadrian * relevant software queue. 2789227364Sadrian */ 2790227364Sadrianvoid 2791227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2792227364Sadrian struct ath_buf *bf) 2793227364Sadrian{ 2794227364Sadrian struct ath_node *an = ATH_NODE(ni); 2795227364Sadrian struct ieee80211_frame *wh; 2796227364Sadrian struct ath_tid *atid; 2797227364Sadrian int pri, tid; 2798227364Sadrian struct mbuf *m0 = bf->bf_m; 2799227364Sadrian 2800243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2801236880Sadrian 2802227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2803227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2804227364Sadrian pri = ath_tx_getac(sc, m0); 2805227364Sadrian tid = ath_tx_gettid(sc, m0); 2806227364Sadrian atid = &an->an_tid[tid]; 2807227364Sadrian 2808236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2809236872Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2810227364Sadrian 2811227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2812239051Sadrian /* XXX potentially duplicate info, re-check */ 2813227364Sadrian bf->bf_state.bfs_tid = tid; 2814244109Sadrian bf->bf_state.bfs_tx_queue = txq->axq_qnum; 2815227364Sadrian bf->bf_state.bfs_pri = pri; 2816227364Sadrian 2817227364Sadrian /* 2818227364Sadrian * If the hardware queue isn't busy, queue it directly. 2819227364Sadrian * If the hardware queue is busy, queue it. 2820227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2821227364Sadrian * queue it. 2822227364Sadrian */ 2823227364Sadrian if (atid->paused) { 2824227364Sadrian /* TID is paused, queue */ 2825236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2826241336Sadrian ATH_TID_INSERT_TAIL(atid, bf, bf_list); 2827227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2828227364Sadrian /* AMPDU pending; queue */ 2829236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2830241336Sadrian ATH_TID_INSERT_TAIL(atid, bf, bf_list); 2831227364Sadrian /* XXX sched? */ 2832227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2833227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2834236877Sadrian 2835236877Sadrian /* 2836236877Sadrian * Always queue the frame to the tail of the list. 2837236877Sadrian */ 2838241336Sadrian ATH_TID_INSERT_TAIL(atid, bf, bf_list); 2839236877Sadrian 2840236877Sadrian /* 2841236877Sadrian * If the hardware queue isn't busy, direct dispatch 2842236877Sadrian * the head frame in the list. Don't schedule the 2843236877Sadrian * TID - let it build some more frames first? 2844236877Sadrian * 2845236877Sadrian * Otherwise, schedule the TID. 2846236877Sadrian */ 2847229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2848241336Sadrian bf = ATH_TID_FIRST(atid); 2849241336Sadrian ATH_TID_REMOVE(atid, bf, bf_list); 2850240180Sadrian 2851240180Sadrian /* 2852240180Sadrian * Ensure it's definitely treated as a non-AMPDU 2853240180Sadrian * frame - this information may have been left 2854240180Sadrian * over from a previous attempt. 2855240180Sadrian */ 2856240180Sadrian bf->bf_state.bfs_aggr = 0; 2857240180Sadrian bf->bf_state.bfs_nframes = 1; 2858240180Sadrian 2859240180Sadrian /* Queue to the hardware */ 2860239051Sadrian ath_tx_xmit_aggr(sc, an, txq, bf); 2861233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2862236872Sadrian "%s: xmit_aggr\n", 2863236872Sadrian __func__); 2864229949Sadrian } else { 2865229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2866236872Sadrian "%s: ampdu; swq'ing\n", 2867236872Sadrian __func__); 2868240899Sadrian 2869227364Sadrian ath_tx_tid_sched(sc, atid); 2870227364Sadrian } 2871227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2872227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2873236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2874240926Sadrian /* See if clrdmask needs to be set */ 2875240926Sadrian ath_tx_update_clrdmask(sc, atid, bf); 2876227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2877227364Sadrian } else { 2878227364Sadrian /* Busy; queue */ 2879236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2880241336Sadrian ATH_TID_INSERT_TAIL(atid, bf, bf_list); 2881227364Sadrian ath_tx_tid_sched(sc, atid); 2882227364Sadrian } 2883227364Sadrian} 2884227364Sadrian 2885227364Sadrian/* 2886245708Sadrian * Only set the clrdmask bit if none of the nodes are currently 2887245708Sadrian * filtered. 2888245708Sadrian * 2889245708Sadrian * XXX TODO: go through all the callers and check to see 2890245708Sadrian * which are being called in the context of looping over all 2891245708Sadrian * TIDs (eg, if all tids are being paused, resumed, etc.) 2892245708Sadrian * That'll avoid O(n^2) complexity here. 2893245708Sadrian */ 2894245708Sadrianstatic void 2895245708Sadrianath_tx_set_clrdmask(struct ath_softc *sc, struct ath_node *an) 2896245708Sadrian{ 2897245708Sadrian int i; 2898245708Sadrian 2899245708Sadrian ATH_TX_LOCK_ASSERT(sc); 2900245708Sadrian 2901245708Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2902245708Sadrian if (an->an_tid[i].isfiltered == 1) 2903245739Sadrian return; 2904245708Sadrian } 2905245708Sadrian an->clrdmask = 1; 2906245708Sadrian} 2907245708Sadrian 2908245708Sadrian/* 2909227364Sadrian * Configure the per-TID node state. 2910227364Sadrian * 2911227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2912227364Sadrian * else to put it just yet. 2913227364Sadrian * 2914227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2915227364Sadrian */ 2916227364Sadrianvoid 2917227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2918227364Sadrian{ 2919227364Sadrian int i, j; 2920227364Sadrian struct ath_tid *atid; 2921227364Sadrian 2922227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2923227364Sadrian atid = &an->an_tid[i]; 2924240639Sadrian 2925240639Sadrian /* XXX now with this bzer(), is the field 0'ing needed? */ 2926240639Sadrian bzero(atid, sizeof(*atid)); 2927240639Sadrian 2928241336Sadrian TAILQ_INIT(&atid->tid_q); 2929241336Sadrian TAILQ_INIT(&atid->filtq.tid_q); 2930227364Sadrian atid->tid = i; 2931227364Sadrian atid->an = an; 2932227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2933227364Sadrian atid->tx_buf[j] = NULL; 2934227364Sadrian atid->baw_head = atid->baw_tail = 0; 2935227364Sadrian atid->paused = 0; 2936227364Sadrian atid->sched = 0; 2937227364Sadrian atid->hwq_depth = 0; 2938227364Sadrian atid->cleanup_inprogress = 0; 2939227364Sadrian if (i == IEEE80211_NONQOS_TID) 2940240946Sadrian atid->ac = ATH_NONQOS_TID_AC; 2941227364Sadrian else 2942227364Sadrian atid->ac = TID_TO_WME_AC(i); 2943227364Sadrian } 2944245708Sadrian an->clrdmask = 1; /* Always start by setting this bit */ 2945227364Sadrian} 2946227364Sadrian 2947227364Sadrian/* 2948227364Sadrian * Pause the current TID. This stops packets from being transmitted 2949227364Sadrian * on it. 2950227364Sadrian * 2951227364Sadrian * Since this is also called from upper layers as well as the driver, 2952227364Sadrian * it will get the TID lock. 2953227364Sadrian */ 2954227364Sadrianstatic void 2955227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2956227364Sadrian{ 2957233908Sadrian 2958243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2959227364Sadrian tid->paused++; 2960227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2961227364Sadrian __func__, tid->paused); 2962227364Sadrian} 2963227364Sadrian 2964227364Sadrian/* 2965227364Sadrian * Unpause the current TID, and schedule it if needed. 2966227364Sadrian */ 2967227364Sadrianstatic void 2968227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2969227364Sadrian{ 2970243786Sadrian ATH_TX_LOCK_ASSERT(sc); 2971243786Sadrian 2972227364Sadrian tid->paused--; 2973227364Sadrian 2974227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2975227364Sadrian __func__, tid->paused); 2976227364Sadrian 2977241170Sadrian if (tid->paused) 2978227364Sadrian return; 2979227364Sadrian 2980241170Sadrian /* 2981241170Sadrian * Override the clrdmask configuration for the next frame 2982241170Sadrian * from this TID, just to get the ball rolling. 2983241170Sadrian */ 2984245708Sadrian ath_tx_set_clrdmask(sc, tid->an); 2985241170Sadrian 2986241170Sadrian if (tid->axq_depth == 0) 2987241170Sadrian return; 2988241170Sadrian 2989240639Sadrian /* XXX isfiltered shouldn't ever be 0 at this point */ 2990240639Sadrian if (tid->isfiltered == 1) { 2991240639Sadrian device_printf(sc->sc_dev, "%s: filtered?!\n", __func__); 2992240639Sadrian return; 2993240639Sadrian } 2994240639Sadrian 2995227364Sadrian ath_tx_tid_sched(sc, tid); 2996246450Sadrian 2997246450Sadrian /* 2998246450Sadrian * Queue the software TX scheduler. 2999246450Sadrian */ 3000246450Sadrian ath_tx_swq_kick(sc); 3001227364Sadrian} 3002227364Sadrian 3003227364Sadrian/* 3004240639Sadrian * Add the given ath_buf to the TID filtered frame list. 3005240639Sadrian * This requires the TID be filtered. 3006240639Sadrian */ 3007240639Sadrianstatic void 3008240639Sadrianath_tx_tid_filt_addbuf(struct ath_softc *sc, struct ath_tid *tid, 3009240639Sadrian struct ath_buf *bf) 3010240639Sadrian{ 3011240639Sadrian 3012243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3013243786Sadrian 3014240639Sadrian if (! tid->isfiltered) 3015240639Sadrian device_printf(sc->sc_dev, "%s: not filtered?!\n", __func__); 3016240639Sadrian 3017240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: bf=%p\n", __func__, bf); 3018240639Sadrian 3019240639Sadrian /* Set the retry bit and bump the retry counter */ 3020240639Sadrian ath_tx_set_retry(sc, bf); 3021240639Sadrian sc->sc_stats.ast_tx_swfiltered++; 3022240639Sadrian 3023241566Sadrian ATH_TID_FILT_INSERT_TAIL(tid, bf, bf_list); 3024240639Sadrian} 3025240639Sadrian 3026240639Sadrian/* 3027240639Sadrian * Handle a completed filtered frame from the given TID. 3028240639Sadrian * This just enables/pauses the filtered frame state if required 3029240639Sadrian * and appends the filtered frame to the filtered queue. 3030240639Sadrian */ 3031240639Sadrianstatic void 3032240639Sadrianath_tx_tid_filt_comp_buf(struct ath_softc *sc, struct ath_tid *tid, 3033240639Sadrian struct ath_buf *bf) 3034240639Sadrian{ 3035240639Sadrian 3036243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3037240639Sadrian 3038240639Sadrian if (! tid->isfiltered) { 3039240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: filter transition\n", 3040240639Sadrian __func__); 3041240639Sadrian tid->isfiltered = 1; 3042240639Sadrian ath_tx_tid_pause(sc, tid); 3043240639Sadrian } 3044240639Sadrian 3045240639Sadrian /* Add the frame to the filter queue */ 3046240639Sadrian ath_tx_tid_filt_addbuf(sc, tid, bf); 3047240639Sadrian} 3048240639Sadrian 3049240639Sadrian/* 3050240639Sadrian * Complete the filtered frame TX completion. 3051240639Sadrian * 3052240639Sadrian * If there are no more frames in the hardware queue, unpause/unfilter 3053240639Sadrian * the TID if applicable. Otherwise we will wait for a node PS transition 3054240639Sadrian * to unfilter. 3055240639Sadrian */ 3056240639Sadrianstatic void 3057240639Sadrianath_tx_tid_filt_comp_complete(struct ath_softc *sc, struct ath_tid *tid) 3058240639Sadrian{ 3059240639Sadrian struct ath_buf *bf; 3060240639Sadrian 3061243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3062240639Sadrian 3063240639Sadrian if (tid->hwq_depth != 0) 3064240639Sadrian return; 3065240639Sadrian 3066240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: hwq=0, transition back\n", 3067240639Sadrian __func__); 3068240639Sadrian tid->isfiltered = 0; 3069245708Sadrian /* XXX ath_tx_tid_resume() also calls ath_tx_set_clrdmask()! */ 3070245708Sadrian ath_tx_set_clrdmask(sc, tid->an); 3071240639Sadrian 3072240639Sadrian /* XXX this is really quite inefficient */ 3073241566Sadrian while ((bf = ATH_TID_FILT_LAST(tid, ath_bufhead_s)) != NULL) { 3074241566Sadrian ATH_TID_FILT_REMOVE(tid, bf, bf_list); 3075241336Sadrian ATH_TID_INSERT_HEAD(tid, bf, bf_list); 3076240639Sadrian } 3077240639Sadrian 3078240639Sadrian ath_tx_tid_resume(sc, tid); 3079240639Sadrian} 3080240639Sadrian 3081240639Sadrian/* 3082240639Sadrian * Called when a single (aggregate or otherwise) frame is completed. 3083240639Sadrian * 3084240639Sadrian * Returns 1 if the buffer could be added to the filtered list 3085240639Sadrian * (cloned or otherwise), 0 if the buffer couldn't be added to the 3086240639Sadrian * filtered list (failed clone; expired retry) and the caller should 3087240639Sadrian * free it and handle it like a failure (eg by sending a BAR.) 3088240639Sadrian */ 3089240639Sadrianstatic int 3090240639Sadrianath_tx_tid_filt_comp_single(struct ath_softc *sc, struct ath_tid *tid, 3091240639Sadrian struct ath_buf *bf) 3092240639Sadrian{ 3093240639Sadrian struct ath_buf *nbf; 3094240639Sadrian int retval; 3095240639Sadrian 3096243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3097240639Sadrian 3098240639Sadrian /* 3099240639Sadrian * Don't allow a filtered frame to live forever. 3100240639Sadrian */ 3101240639Sadrian if (bf->bf_state.bfs_retries > SWMAX_RETRIES) { 3102241170Sadrian sc->sc_stats.ast_tx_swretrymax++; 3103240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3104240639Sadrian "%s: bf=%p, seqno=%d, exceeded retries\n", 3105240639Sadrian __func__, 3106240639Sadrian bf, 3107240639Sadrian bf->bf_state.bfs_seqno); 3108240639Sadrian return (0); 3109240639Sadrian } 3110240639Sadrian 3111240639Sadrian /* 3112240639Sadrian * A busy buffer can't be added to the retry list. 3113240639Sadrian * It needs to be cloned. 3114240639Sadrian */ 3115240639Sadrian if (bf->bf_flags & ATH_BUF_BUSY) { 3116240639Sadrian nbf = ath_tx_retry_clone(sc, tid->an, tid, bf); 3117240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3118240639Sadrian "%s: busy buffer clone: %p -> %p\n", 3119240639Sadrian __func__, bf, nbf); 3120240639Sadrian } else { 3121240639Sadrian nbf = bf; 3122240639Sadrian } 3123240639Sadrian 3124240639Sadrian if (nbf == NULL) { 3125240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3126240639Sadrian "%s: busy buffer couldn't be cloned (%p)!\n", 3127240639Sadrian __func__, bf); 3128240639Sadrian retval = 1; 3129240639Sadrian } else { 3130240639Sadrian ath_tx_tid_filt_comp_buf(sc, tid, nbf); 3131240639Sadrian retval = 0; 3132240639Sadrian } 3133240639Sadrian ath_tx_tid_filt_comp_complete(sc, tid); 3134240639Sadrian 3135240639Sadrian return (retval); 3136240639Sadrian} 3137240639Sadrian 3138240639Sadrianstatic void 3139240639Sadrianath_tx_tid_filt_comp_aggr(struct ath_softc *sc, struct ath_tid *tid, 3140240639Sadrian struct ath_buf *bf_first, ath_bufhead *bf_q) 3141240639Sadrian{ 3142240639Sadrian struct ath_buf *bf, *bf_next, *nbf; 3143240639Sadrian 3144243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3145240639Sadrian 3146240639Sadrian bf = bf_first; 3147240639Sadrian while (bf) { 3148240639Sadrian bf_next = bf->bf_next; 3149240639Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3150240639Sadrian 3151240639Sadrian /* 3152240639Sadrian * Don't allow a filtered frame to live forever. 3153240639Sadrian */ 3154240639Sadrian if (bf->bf_state.bfs_retries > SWMAX_RETRIES) { 3155247029Sadrian sc->sc_stats.ast_tx_swretrymax++; 3156240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3157240639Sadrian "%s: bf=%p, seqno=%d, exceeded retries\n", 3158240639Sadrian __func__, 3159240639Sadrian bf, 3160240639Sadrian bf->bf_state.bfs_seqno); 3161240639Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3162240639Sadrian goto next; 3163240639Sadrian } 3164240639Sadrian 3165240639Sadrian if (bf->bf_flags & ATH_BUF_BUSY) { 3166240639Sadrian nbf = ath_tx_retry_clone(sc, tid->an, tid, bf); 3167240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3168240639Sadrian "%s: busy buffer cloned: %p -> %p", 3169240639Sadrian __func__, bf, nbf); 3170240639Sadrian } else { 3171240639Sadrian nbf = bf; 3172240639Sadrian } 3173240639Sadrian 3174240639Sadrian /* 3175240639Sadrian * If the buffer couldn't be cloned, add it to bf_q; 3176240639Sadrian * the caller will free the buffer(s) as required. 3177240639Sadrian */ 3178240639Sadrian if (nbf == NULL) { 3179240639Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, 3180240639Sadrian "%s: buffer couldn't be cloned! (%p)\n", 3181240639Sadrian __func__, bf); 3182240639Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3183240639Sadrian } else { 3184240639Sadrian ath_tx_tid_filt_comp_buf(sc, tid, nbf); 3185240639Sadrian } 3186240639Sadriannext: 3187240639Sadrian bf = bf_next; 3188240639Sadrian } 3189240639Sadrian 3190240639Sadrian ath_tx_tid_filt_comp_complete(sc, tid); 3191240639Sadrian} 3192240639Sadrian 3193240639Sadrian/* 3194233908Sadrian * Suspend the queue because we need to TX a BAR. 3195233908Sadrian */ 3196233908Sadrianstatic void 3197233908Sadrianath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid) 3198233908Sadrian{ 3199233908Sadrian 3200243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3201243786Sadrian 3202235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3203235676Sadrian "%s: tid=%p, bar_wait=%d, bar_tx=%d, called\n", 3204233908Sadrian __func__, 3205235676Sadrian tid, 3206235676Sadrian tid->bar_wait, 3207235676Sadrian tid->bar_tx); 3208233908Sadrian 3209233908Sadrian /* We shouldn't be called when bar_tx is 1 */ 3210233908Sadrian if (tid->bar_tx) { 3211233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx is 1?!\n", 3212233908Sadrian __func__); 3213233908Sadrian } 3214233908Sadrian 3215233908Sadrian /* If we've already been called, just be patient. */ 3216233908Sadrian if (tid->bar_wait) 3217233908Sadrian return; 3218233908Sadrian 3219233908Sadrian /* Wait! */ 3220233908Sadrian tid->bar_wait = 1; 3221233908Sadrian 3222233908Sadrian /* Only one pause, no matter how many frames fail */ 3223233908Sadrian ath_tx_tid_pause(sc, tid); 3224233908Sadrian} 3225233908Sadrian 3226233908Sadrian/* 3227233908Sadrian * We've finished with BAR handling - either we succeeded or 3228233908Sadrian * failed. Either way, unsuspend TX. 3229233908Sadrian */ 3230233908Sadrianstatic void 3231233908Sadrianath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid) 3232233908Sadrian{ 3233233908Sadrian 3234243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3235243786Sadrian 3236235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3237233908Sadrian "%s: tid=%p, called\n", 3238233908Sadrian __func__, 3239233908Sadrian tid); 3240233908Sadrian 3241233908Sadrian if (tid->bar_tx == 0 || tid->bar_wait == 0) { 3242233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx=%d, bar_wait=%d: ?\n", 3243233908Sadrian __func__, tid->bar_tx, tid->bar_wait); 3244233908Sadrian } 3245233908Sadrian 3246233908Sadrian tid->bar_tx = tid->bar_wait = 0; 3247233908Sadrian ath_tx_tid_resume(sc, tid); 3248233908Sadrian} 3249233908Sadrian 3250233908Sadrian/* 3251233908Sadrian * Return whether we're ready to TX a BAR frame. 3252233908Sadrian * 3253233908Sadrian * Requires the TID lock be held. 3254233908Sadrian */ 3255233908Sadrianstatic int 3256233908Sadrianath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid) 3257233908Sadrian{ 3258233908Sadrian 3259243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3260233908Sadrian 3261233908Sadrian if (tid->bar_wait == 0 || tid->hwq_depth > 0) 3262233908Sadrian return (0); 3263233908Sadrian 3264235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, "%s: tid=%p (%d), bar ready\n", 3265235491Sadrian __func__, tid, tid->tid); 3266235491Sadrian 3267233908Sadrian return (1); 3268233908Sadrian} 3269233908Sadrian 3270233908Sadrian/* 3271233908Sadrian * Check whether the current TID is ready to have a BAR 3272233908Sadrian * TXed and if so, do the TX. 3273233908Sadrian * 3274233908Sadrian * Since the TID/TXQ lock can't be held during a call to 3275233908Sadrian * ieee80211_send_bar(), we have to do the dirty thing of unlocking it, 3276233908Sadrian * sending the BAR and locking it again. 3277233908Sadrian * 3278233908Sadrian * Eventually, the code to send the BAR should be broken out 3279233908Sadrian * from this routine so the lock doesn't have to be reacquired 3280233908Sadrian * just to be immediately dropped by the caller. 3281233908Sadrian */ 3282233908Sadrianstatic void 3283233908Sadrianath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid) 3284233908Sadrian{ 3285233908Sadrian struct ieee80211_tx_ampdu *tap; 3286233908Sadrian 3287243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3288233908Sadrian 3289235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3290233908Sadrian "%s: tid=%p, called\n", 3291233908Sadrian __func__, 3292233908Sadrian tid); 3293233908Sadrian 3294233908Sadrian tap = ath_tx_get_tx_tid(tid->an, tid->tid); 3295233908Sadrian 3296233908Sadrian /* 3297233908Sadrian * This is an error condition! 3298233908Sadrian */ 3299233908Sadrian if (tid->bar_wait == 0 || tid->bar_tx == 1) { 3300233908Sadrian device_printf(sc->sc_dev, 3301233908Sadrian "%s: tid=%p, bar_tx=%d, bar_wait=%d: ?\n", 3302233908Sadrian __func__, 3303233908Sadrian tid, 3304233908Sadrian tid->bar_tx, 3305233908Sadrian tid->bar_wait); 3306233908Sadrian return; 3307233908Sadrian } 3308233908Sadrian 3309233908Sadrian /* Don't do anything if we still have pending frames */ 3310233908Sadrian if (tid->hwq_depth > 0) { 3311235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3312233908Sadrian "%s: tid=%p, hwq_depth=%d, waiting\n", 3313233908Sadrian __func__, 3314233908Sadrian tid, 3315233908Sadrian tid->hwq_depth); 3316233908Sadrian return; 3317233908Sadrian } 3318233908Sadrian 3319233908Sadrian /* We're now about to TX */ 3320233908Sadrian tid->bar_tx = 1; 3321233908Sadrian 3322233908Sadrian /* 3323240724Sadrian * Override the clrdmask configuration for the next frame, 3324240724Sadrian * just to get the ball rolling. 3325240724Sadrian */ 3326245708Sadrian ath_tx_set_clrdmask(sc, tid->an); 3327240724Sadrian 3328240724Sadrian /* 3329233908Sadrian * Calculate new BAW left edge, now that all frames have either 3330233908Sadrian * succeeded or failed. 3331233908Sadrian * 3332233908Sadrian * XXX verify this is _actually_ the valid value to begin at! 3333233908Sadrian */ 3334235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 3335233908Sadrian "%s: tid=%p, new BAW left edge=%d\n", 3336233908Sadrian __func__, 3337233908Sadrian tid, 3338233908Sadrian tap->txa_start); 3339233908Sadrian 3340233908Sadrian /* Try sending the BAR frame */ 3341233908Sadrian /* We can't hold the lock here! */ 3342233908Sadrian 3343243786Sadrian ATH_TX_UNLOCK(sc); 3344233908Sadrian if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) { 3345233908Sadrian /* Success? Now we wait for notification that it's done */ 3346243786Sadrian ATH_TX_LOCK(sc); 3347233908Sadrian return; 3348233908Sadrian } 3349233908Sadrian 3350233908Sadrian /* Failure? For now, warn loudly and continue */ 3351243786Sadrian ATH_TX_LOCK(sc); 3352233908Sadrian device_printf(sc->sc_dev, "%s: tid=%p, failed to TX BAR, continue!\n", 3353233908Sadrian __func__, tid); 3354233908Sadrian ath_tx_tid_bar_unsuspend(sc, tid); 3355233908Sadrian} 3356233908Sadrian 3357240639Sadrianstatic void 3358240639Sadrianath_tx_tid_drain_pkt(struct ath_softc *sc, struct ath_node *an, 3359240639Sadrian struct ath_tid *tid, ath_bufhead *bf_cq, struct ath_buf *bf) 3360240639Sadrian{ 3361233908Sadrian 3362243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3363240639Sadrian 3364240639Sadrian /* 3365240639Sadrian * If the current TID is running AMPDU, update 3366240639Sadrian * the BAW. 3367240639Sadrian */ 3368240639Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 3369240639Sadrian bf->bf_state.bfs_dobaw) { 3370240639Sadrian /* 3371240639Sadrian * Only remove the frame from the BAW if it's 3372240639Sadrian * been transmitted at least once; this means 3373240639Sadrian * the frame was in the BAW to begin with. 3374240639Sadrian */ 3375240639Sadrian if (bf->bf_state.bfs_retries > 0) { 3376240639Sadrian ath_tx_update_baw(sc, an, tid, bf); 3377240639Sadrian bf->bf_state.bfs_dobaw = 0; 3378240639Sadrian } 3379247135Sadrian#if 0 3380240639Sadrian /* 3381240639Sadrian * This has become a non-fatal error now 3382240639Sadrian */ 3383240639Sadrian if (! bf->bf_state.bfs_addedbaw) 3384240639Sadrian device_printf(sc->sc_dev, 3385240639Sadrian "%s: wasn't added: seqno %d\n", 3386240639Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3387247135Sadrian#endif 3388240639Sadrian } 3389248671Sadrian 3390248671Sadrian /* Strip it out of an aggregate list if it was in one */ 3391248671Sadrian bf->bf_next = NULL; 3392248671Sadrian 3393248671Sadrian /* Insert on the free queue to be freed by the caller */ 3394240639Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 3395240639Sadrian} 3396240639Sadrian 3397240639Sadrianstatic void 3398240639Sadrianath_tx_tid_drain_print(struct ath_softc *sc, struct ath_node *an, 3399240899Sadrian const char *pfx, struct ath_tid *tid, struct ath_buf *bf) 3400240639Sadrian{ 3401240639Sadrian struct ieee80211_node *ni = &an->an_node; 3402240639Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3403240639Sadrian struct ieee80211_tx_ampdu *tap; 3404240639Sadrian 3405240639Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3406240639Sadrian 3407240639Sadrian device_printf(sc->sc_dev, 3408240899Sadrian "%s: %s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 3409240639Sadrian "seqno=%d, retry=%d\n", 3410240899Sadrian __func__, pfx, ni, bf, 3411240639Sadrian bf->bf_state.bfs_addedbaw, 3412240639Sadrian bf->bf_state.bfs_dobaw, 3413240639Sadrian SEQNO(bf->bf_state.bfs_seqno), 3414240639Sadrian bf->bf_state.bfs_retries); 3415240639Sadrian device_printf(sc->sc_dev, 3416240899Sadrian "%s: node %p: bf=%p: txq[%d] axq_depth=%d, axq_aggr_depth=%d\n", 3417240724Sadrian __func__, ni, bf, 3418240899Sadrian txq->axq_qnum, 3419240899Sadrian txq->axq_depth, 3420240899Sadrian txq->axq_aggr_depth); 3421240724Sadrian 3422240724Sadrian device_printf(sc->sc_dev, 3423240639Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d, isfiltered=%d\n", 3424240639Sadrian __func__, ni, bf, 3425240639Sadrian tid->axq_depth, 3426240639Sadrian tid->hwq_depth, 3427240639Sadrian tid->bar_wait, 3428240639Sadrian tid->isfiltered); 3429240639Sadrian device_printf(sc->sc_dev, 3430240724Sadrian "%s: node %p: tid %d: " 3431240724Sadrian "sched=%d, paused=%d, " 3432240724Sadrian "incomp=%d, baw_head=%d, " 3433240639Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 3434240724Sadrian __func__, ni, tid->tid, 3435240724Sadrian tid->sched, tid->paused, 3436240724Sadrian tid->incomp, tid->baw_head, 3437240639Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 3438240639Sadrian ni->ni_txseqs[tid->tid]); 3439240639Sadrian 3440240639Sadrian /* XXX Dump the frame, see what it is? */ 3441240639Sadrian ieee80211_dump_pkt(ni->ni_ic, 3442240639Sadrian mtod(bf->bf_m, const uint8_t *), 3443240639Sadrian bf->bf_m->m_len, 0, -1); 3444240639Sadrian} 3445240639Sadrian 3446233908Sadrian/* 3447227364Sadrian * Free any packets currently pending in the software TX queue. 3448227364Sadrian * 3449227364Sadrian * This will be called when a node is being deleted. 3450227364Sadrian * 3451227364Sadrian * It can also be called on an active node during an interface 3452227364Sadrian * reset or state transition. 3453227364Sadrian * 3454227364Sadrian * (From Linux/reference): 3455227364Sadrian * 3456227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 3457227364Sadrian * sequence number(s) without setting the retry bit. The 3458227364Sadrian * alternative is to give up on these and BAR the receiver's window 3459227364Sadrian * forward. 3460227364Sadrian */ 3461227364Sadrianstatic void 3462229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 3463229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 3464227364Sadrian{ 3465227364Sadrian struct ath_buf *bf; 3466227364Sadrian struct ieee80211_tx_ampdu *tap; 3467227364Sadrian struct ieee80211_node *ni = &an->an_node; 3468240639Sadrian int t; 3469227364Sadrian 3470227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3471227364Sadrian 3472243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3473227364Sadrian 3474227364Sadrian /* Walk the queue, free frames */ 3475240639Sadrian t = 0; 3476227364Sadrian for (;;) { 3477241336Sadrian bf = ATH_TID_FIRST(tid); 3478227364Sadrian if (bf == NULL) { 3479227364Sadrian break; 3480227364Sadrian } 3481227364Sadrian 3482227364Sadrian if (t == 0) { 3483240899Sadrian ath_tx_tid_drain_print(sc, an, "norm", tid, bf); 3484240639Sadrian t = 1; 3485240639Sadrian } 3486229165Sadrian 3487241336Sadrian ATH_TID_REMOVE(tid, bf, bf_list); 3488240639Sadrian ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf); 3489240639Sadrian } 3490229165Sadrian 3491240639Sadrian /* And now, drain the filtered frame queue */ 3492240639Sadrian t = 0; 3493240639Sadrian for (;;) { 3494241566Sadrian bf = ATH_TID_FILT_FIRST(tid); 3495240639Sadrian if (bf == NULL) 3496240639Sadrian break; 3497240639Sadrian 3498240639Sadrian if (t == 0) { 3499240899Sadrian ath_tx_tid_drain_print(sc, an, "filt", tid, bf); 3500233897Sadrian t = 1; 3501227364Sadrian } 3502227364Sadrian 3503241566Sadrian ATH_TID_FILT_REMOVE(tid, bf, bf_list); 3504240639Sadrian ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf); 3505227364Sadrian } 3506227364Sadrian 3507227364Sadrian /* 3508240724Sadrian * Override the clrdmask configuration for the next frame 3509240724Sadrian * in case there is some future transmission, just to get 3510240724Sadrian * the ball rolling. 3511240724Sadrian * 3512240724Sadrian * This won't hurt things if the TID is about to be freed. 3513240724Sadrian */ 3514245708Sadrian ath_tx_set_clrdmask(sc, tid->an); 3515240724Sadrian 3516240724Sadrian /* 3517227364Sadrian * Now that it's completed, grab the TID lock and update 3518227364Sadrian * the sequence number and BAW window. 3519227364Sadrian * Because sequence numbers have been assigned to frames 3520227364Sadrian * that haven't been sent yet, it's entirely possible 3521227364Sadrian * we'll be called with some pending frames that have not 3522227364Sadrian * been transmitted. 3523227364Sadrian * 3524227364Sadrian * The cleaner solution is to do the sequence number allocation 3525227364Sadrian * when the packet is first transmitted - and thus the "retries" 3526227364Sadrian * check above would be enough to update the BAW/seqno. 3527227364Sadrian */ 3528227364Sadrian 3529227364Sadrian /* But don't do it for non-QoS TIDs */ 3530227364Sadrian if (tap) { 3531227364Sadrian#if 0 3532227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3533227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 3534227364Sadrian __func__, an, tid->tid, tap->txa_start); 3535227364Sadrian#endif 3536227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 3537227364Sadrian tid->baw_tail = tid->baw_head; 3538227364Sadrian } 3539227364Sadrian} 3540227364Sadrian 3541227364Sadrian/* 3542227364Sadrian * Flush all software queued packets for the given node. 3543227364Sadrian * 3544227364Sadrian * This occurs when a completion handler frees the last buffer 3545227364Sadrian * for a node, and the node is thus freed. This causes the node 3546227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 3547227364Sadrian */ 3548227364Sadrianvoid 3549227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 3550227364Sadrian{ 3551227364Sadrian int tid; 3552227364Sadrian ath_bufhead bf_cq; 3553227364Sadrian struct ath_buf *bf; 3554227364Sadrian 3555227364Sadrian TAILQ_INIT(&bf_cq); 3556227364Sadrian 3557240899Sadrian ATH_KTR(sc, ATH_KTR_NODE, 1, "ath_tx_node_flush: flush node; ni=%p", 3558240899Sadrian &an->an_node); 3559240899Sadrian 3560243786Sadrian ATH_TX_LOCK(sc); 3561227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 3562227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3563227364Sadrian 3564227364Sadrian /* Free packets */ 3565227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 3566240914Sadrian /* Remove this tid from the list of active tids */ 3567240914Sadrian ath_tx_tid_unsched(sc, atid); 3568227364Sadrian } 3569243786Sadrian ATH_TX_UNLOCK(sc); 3570227364Sadrian 3571227364Sadrian /* Handle completed frames */ 3572227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3573227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3574227364Sadrian ath_tx_default_comp(sc, bf, 0); 3575227364Sadrian } 3576227364Sadrian} 3577227364Sadrian 3578227364Sadrian/* 3579227364Sadrian * Drain all the software TXQs currently with traffic queued. 3580227364Sadrian */ 3581227364Sadrianvoid 3582227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 3583227364Sadrian{ 3584227364Sadrian struct ath_tid *tid; 3585227364Sadrian ath_bufhead bf_cq; 3586227364Sadrian struct ath_buf *bf; 3587227364Sadrian 3588227364Sadrian TAILQ_INIT(&bf_cq); 3589243786Sadrian ATH_TX_LOCK(sc); 3590227364Sadrian 3591227364Sadrian /* 3592227364Sadrian * Iterate over all active tids for the given txq, 3593227364Sadrian * flushing and unsched'ing them 3594227364Sadrian */ 3595227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 3596227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 3597227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 3598227364Sadrian ath_tx_tid_unsched(sc, tid); 3599227364Sadrian } 3600227364Sadrian 3601243786Sadrian ATH_TX_UNLOCK(sc); 3602227364Sadrian 3603227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3604227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3605227364Sadrian ath_tx_default_comp(sc, bf, 0); 3606227364Sadrian } 3607227364Sadrian} 3608227364Sadrian 3609227364Sadrian/* 3610227364Sadrian * Handle completion of non-aggregate session frames. 3611240883Sadrian * 3612240883Sadrian * This (currently) doesn't implement software retransmission of 3613240883Sadrian * non-aggregate frames! 3614240883Sadrian * 3615240883Sadrian * Software retransmission of non-aggregate frames needs to obey 3616240883Sadrian * the strict sequence number ordering, and drop any frames that 3617240883Sadrian * will fail this. 3618240883Sadrian * 3619240883Sadrian * For now, filtered frames and frame transmission will cause 3620240883Sadrian * all kinds of issues. So we don't support them. 3621240883Sadrian * 3622240883Sadrian * So anyone queuing frames via ath_tx_normal_xmit() or 3623240883Sadrian * ath_tx_hw_queue_norm() must override and set CLRDMASK. 3624227364Sadrian */ 3625227364Sadrianvoid 3626227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3627227364Sadrian{ 3628227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3629227364Sadrian struct ath_node *an = ATH_NODE(ni); 3630227364Sadrian int tid = bf->bf_state.bfs_tid; 3631227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3632227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3633227364Sadrian 3634227364Sadrian /* The TID state is protected behind the TXQ lock */ 3635243786Sadrian ATH_TX_LOCK(sc); 3636227364Sadrian 3637227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 3638227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 3639227364Sadrian 3640227364Sadrian atid->hwq_depth--; 3641240639Sadrian 3642240883Sadrian#if 0 3643240883Sadrian /* 3644240883Sadrian * If the frame was filtered, stick it on the filter frame 3645240883Sadrian * queue and complain about it. It shouldn't happen! 3646240883Sadrian */ 3647240883Sadrian if ((ts->ts_status & HAL_TXERR_FILT) || 3648240883Sadrian (ts->ts_status != 0 && atid->isfiltered)) { 3649240883Sadrian device_printf(sc->sc_dev, 3650240883Sadrian "%s: isfiltered=%d, ts_status=%d: huh?\n", 3651240883Sadrian __func__, 3652240883Sadrian atid->isfiltered, 3653240883Sadrian ts->ts_status); 3654240883Sadrian ath_tx_tid_filt_comp_buf(sc, atid, bf); 3655240883Sadrian } 3656240883Sadrian#endif 3657240639Sadrian if (atid->isfiltered) 3658240883Sadrian device_printf(sc->sc_dev, "%s: filtered?!\n", __func__); 3659227364Sadrian if (atid->hwq_depth < 0) 3660227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3661227364Sadrian __func__, atid->hwq_depth); 3662240639Sadrian 3663240639Sadrian /* 3664240639Sadrian * If the queue is filtered, potentially mark it as complete 3665240639Sadrian * and reschedule it as needed. 3666240639Sadrian * 3667240639Sadrian * This is required as there may be a subsequent TX descriptor 3668240639Sadrian * for this end-node that has CLRDMASK set, so it's quite possible 3669240639Sadrian * that a filtered frame will be followed by a non-filtered 3670240639Sadrian * (complete or otherwise) frame. 3671240639Sadrian * 3672240639Sadrian * XXX should we do this before we complete the frame? 3673240639Sadrian */ 3674240639Sadrian if (atid->isfiltered) 3675240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 3676243786Sadrian ATH_TX_UNLOCK(sc); 3677227364Sadrian 3678227364Sadrian /* 3679227364Sadrian * punt to rate control if we're not being cleaned up 3680227364Sadrian * during a hw queue drain and the frame wanted an ACK. 3681227364Sadrian */ 3682233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3683227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3684227364Sadrian ts, bf->bf_state.bfs_pktlen, 3685227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3686227364Sadrian 3687227364Sadrian ath_tx_default_comp(sc, bf, fail); 3688227364Sadrian} 3689227364Sadrian 3690227364Sadrian/* 3691227364Sadrian * Handle cleanup of aggregate session packets that aren't 3692227364Sadrian * an A-MPDU. 3693227364Sadrian * 3694227364Sadrian * There's no need to update the BAW here - the session is being 3695227364Sadrian * torn down. 3696227364Sadrian */ 3697227364Sadrianstatic void 3698227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3699227364Sadrian{ 3700227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3701227364Sadrian struct ath_node *an = ATH_NODE(ni); 3702227364Sadrian int tid = bf->bf_state.bfs_tid; 3703227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3704227364Sadrian 3705227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 3706227364Sadrian __func__, tid, atid->incomp); 3707227364Sadrian 3708243786Sadrian ATH_TX_LOCK(sc); 3709227364Sadrian atid->incomp--; 3710227364Sadrian if (atid->incomp == 0) { 3711227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3712227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3713227364Sadrian __func__, tid); 3714227364Sadrian atid->cleanup_inprogress = 0; 3715227364Sadrian ath_tx_tid_resume(sc, atid); 3716227364Sadrian } 3717243786Sadrian ATH_TX_UNLOCK(sc); 3718227364Sadrian 3719227364Sadrian ath_tx_default_comp(sc, bf, 0); 3720227364Sadrian} 3721227364Sadrian 3722227364Sadrian/* 3723227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 3724227364Sadrian * unaggregated. 3725227364Sadrian * 3726227364Sadrian * - Discard all retry frames from the s/w queue. 3727227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 3728227364Sadrian * - Count the number of unacked frames, and let transmit completion 3729227364Sadrian * handle it later. 3730227364Sadrian * 3731227364Sadrian * The caller is responsible for pausing the TID. 3732227364Sadrian */ 3733227364Sadrianstatic void 3734235749Sadrianath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 3735227364Sadrian{ 3736227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3737227364Sadrian struct ieee80211_tx_ampdu *tap; 3738227364Sadrian struct ath_buf *bf, *bf_next; 3739227364Sadrian ath_bufhead bf_cq; 3740227364Sadrian 3741235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 3742227364Sadrian "%s: TID %d: called\n", __func__, tid); 3743227364Sadrian 3744227364Sadrian TAILQ_INIT(&bf_cq); 3745243786Sadrian ATH_TX_LOCK(sc); 3746227364Sadrian 3747227364Sadrian /* 3748240639Sadrian * Move the filtered frames to the TX queue, before 3749240639Sadrian * we run off and discard/process things. 3750240639Sadrian */ 3751240639Sadrian /* XXX this is really quite inefficient */ 3752241566Sadrian while ((bf = ATH_TID_FILT_LAST(atid, ath_bufhead_s)) != NULL) { 3753241566Sadrian ATH_TID_FILT_REMOVE(atid, bf, bf_list); 3754241336Sadrian ATH_TID_INSERT_HEAD(atid, bf, bf_list); 3755240639Sadrian } 3756240639Sadrian 3757240639Sadrian /* 3758227364Sadrian * Update the frames in the software TX queue: 3759227364Sadrian * 3760227364Sadrian * + Discard retry frames in the queue 3761227364Sadrian * + Fix the completion function to be non-aggregate 3762227364Sadrian */ 3763241336Sadrian bf = ATH_TID_FIRST(atid); 3764227364Sadrian while (bf) { 3765227364Sadrian if (bf->bf_state.bfs_isretried) { 3766227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 3767241336Sadrian ATH_TID_REMOVE(atid, bf, bf_list); 3768227364Sadrian if (bf->bf_state.bfs_dobaw) { 3769227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3770227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3771227364Sadrian device_printf(sc->sc_dev, 3772227364Sadrian "%s: wasn't added: seqno %d\n", 3773229949Sadrian __func__, 3774229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3775227364Sadrian } 3776227364Sadrian bf->bf_state.bfs_dobaw = 0; 3777227364Sadrian /* 3778227364Sadrian * Call the default completion handler with "fail" just 3779227364Sadrian * so upper levels are suitably notified about this. 3780227364Sadrian */ 3781227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3782227364Sadrian bf = bf_next; 3783227364Sadrian continue; 3784227364Sadrian } 3785227364Sadrian /* Give these the default completion handler */ 3786227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3787227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 3788227364Sadrian } 3789227364Sadrian 3790227364Sadrian /* The caller is required to pause the TID */ 3791227364Sadrian#if 0 3792227364Sadrian /* Pause the TID */ 3793227364Sadrian ath_tx_tid_pause(sc, atid); 3794227364Sadrian#endif 3795227364Sadrian 3796227364Sadrian /* 3797227364Sadrian * Calculate what hardware-queued frames exist based 3798227364Sadrian * on the current BAW size. Ie, what frames have been 3799227364Sadrian * added to the TX hardware queue for this TID but 3800227364Sadrian * not yet ACKed. 3801227364Sadrian */ 3802227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3803227364Sadrian /* Need the lock - fiddling with BAW */ 3804227364Sadrian while (atid->baw_head != atid->baw_tail) { 3805227364Sadrian if (atid->tx_buf[atid->baw_head]) { 3806227364Sadrian atid->incomp++; 3807227364Sadrian atid->cleanup_inprogress = 1; 3808227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 3809227364Sadrian } 3810227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 3811227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 3812227364Sadrian } 3813227364Sadrian 3814227364Sadrian /* 3815227364Sadrian * If cleanup is required, defer TID scheduling 3816227364Sadrian * until all the HW queued packets have been 3817227364Sadrian * sent. 3818227364Sadrian */ 3819227364Sadrian if (! atid->cleanup_inprogress) 3820227364Sadrian ath_tx_tid_resume(sc, atid); 3821227364Sadrian 3822227364Sadrian if (atid->cleanup_inprogress) 3823227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3824227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 3825227364Sadrian __func__, tid, atid->incomp); 3826243786Sadrian ATH_TX_UNLOCK(sc); 3827227364Sadrian 3828227364Sadrian /* Handle completing frames and fail them */ 3829227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3830227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3831227364Sadrian ath_tx_default_comp(sc, bf, 1); 3832227364Sadrian } 3833227364Sadrian} 3834227364Sadrian 3835227364Sadrianstatic struct ath_buf * 3836227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3837227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3838227364Sadrian{ 3839227364Sadrian struct ath_buf *nbf; 3840227364Sadrian int error; 3841227364Sadrian 3842227364Sadrian nbf = ath_buf_clone(sc, bf); 3843227364Sadrian 3844227364Sadrian#if 0 3845227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3846227364Sadrian __func__); 3847227364Sadrian#endif 3848227364Sadrian 3849227364Sadrian if (nbf == NULL) { 3850227364Sadrian /* Failed to clone */ 3851227364Sadrian device_printf(sc->sc_dev, 3852227364Sadrian "%s: failed to clone a busy buffer\n", 3853227364Sadrian __func__); 3854227364Sadrian return NULL; 3855227364Sadrian } 3856227364Sadrian 3857227364Sadrian /* Setup the dma for the new buffer */ 3858227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3859227364Sadrian if (error != 0) { 3860227364Sadrian device_printf(sc->sc_dev, 3861227364Sadrian "%s: failed to setup dma for clone\n", 3862227364Sadrian __func__); 3863227364Sadrian /* 3864227364Sadrian * Put this at the head of the list, not tail; 3865227364Sadrian * that way it doesn't interfere with the 3866227364Sadrian * busy buffer logic (which uses the tail of 3867227364Sadrian * the list.) 3868227364Sadrian */ 3869227364Sadrian ATH_TXBUF_LOCK(sc); 3870236994Sadrian ath_returnbuf_head(sc, nbf); 3871227364Sadrian ATH_TXBUF_UNLOCK(sc); 3872227364Sadrian return NULL; 3873227364Sadrian } 3874227364Sadrian 3875227398Sadrian /* Update BAW if required, before we free the original buf */ 3876227398Sadrian if (bf->bf_state.bfs_dobaw) 3877227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3878227398Sadrian 3879227364Sadrian /* Free current buffer; return the older buffer */ 3880227364Sadrian bf->bf_m = NULL; 3881227364Sadrian bf->bf_node = NULL; 3882227364Sadrian ath_freebuf(sc, bf); 3883240639Sadrian 3884227364Sadrian return nbf; 3885227364Sadrian} 3886227364Sadrian 3887227364Sadrian/* 3888227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3889227364Sadrian * session. 3890227364Sadrian * 3891227364Sadrian * If too many retries occur, pause the TID, wait for 3892227364Sadrian * any further retransmits (as there's no reason why 3893227364Sadrian * non-aggregate frames in an aggregate session are 3894227364Sadrian * transmitted in-order; they just have to be in-BAW) 3895227364Sadrian * and then queue a BAR. 3896227364Sadrian */ 3897227364Sadrianstatic void 3898227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3899227364Sadrian{ 3900227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3901227364Sadrian struct ath_node *an = ATH_NODE(ni); 3902227364Sadrian int tid = bf->bf_state.bfs_tid; 3903227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3904227364Sadrian struct ieee80211_tx_ampdu *tap; 3905227364Sadrian 3906243786Sadrian ATH_TX_LOCK(sc); 3907227364Sadrian 3908227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3909227364Sadrian 3910227364Sadrian /* 3911227364Sadrian * If the buffer is marked as busy, we can't directly 3912227364Sadrian * reuse it. Instead, try to clone the buffer. 3913227364Sadrian * If the clone is successful, recycle the old buffer. 3914227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3915227364Sadrian * to force the next bit of code to free the buffer 3916227364Sadrian * for us. 3917227364Sadrian */ 3918227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3919227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3920227364Sadrian struct ath_buf *nbf; 3921227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3922227364Sadrian if (nbf) 3923227364Sadrian /* bf has been freed at this point */ 3924227364Sadrian bf = nbf; 3925227364Sadrian else 3926227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3927227364Sadrian } 3928227364Sadrian 3929227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3930227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3931227364Sadrian "%s: exceeded retries; seqno %d\n", 3932227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3933227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3934227364Sadrian 3935227364Sadrian /* Update BAW anyway */ 3936227364Sadrian if (bf->bf_state.bfs_dobaw) { 3937227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3938227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3939227364Sadrian device_printf(sc->sc_dev, 3940227364Sadrian "%s: wasn't added: seqno %d\n", 3941227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3942227364Sadrian } 3943227364Sadrian bf->bf_state.bfs_dobaw = 0; 3944227364Sadrian 3945233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3946233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3947227364Sadrian 3948233908Sadrian /* Send the BAR if there are no other frames waiting */ 3949233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3950233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3951227364Sadrian 3952243786Sadrian ATH_TX_UNLOCK(sc); 3953227364Sadrian 3954227364Sadrian /* Free buffer, bf is free after this call */ 3955227364Sadrian ath_tx_default_comp(sc, bf, 0); 3956227364Sadrian return; 3957227364Sadrian } 3958227364Sadrian 3959227364Sadrian /* 3960227364Sadrian * This increments the retry counter as well as 3961227364Sadrian * sets the retry flag in the ath_buf and packet 3962227364Sadrian * body. 3963227364Sadrian */ 3964227364Sadrian ath_tx_set_retry(sc, bf); 3965240639Sadrian sc->sc_stats.ast_tx_swretries++; 3966227364Sadrian 3967227364Sadrian /* 3968227364Sadrian * Insert this at the head of the queue, so it's 3969227364Sadrian * retried before any current/subsequent frames. 3970227364Sadrian */ 3971241336Sadrian ATH_TID_INSERT_HEAD(atid, bf, bf_list); 3972227364Sadrian ath_tx_tid_sched(sc, atid); 3973233908Sadrian /* Send the BAR if there are no other frames waiting */ 3974233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3975233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3976227364Sadrian 3977243786Sadrian ATH_TX_UNLOCK(sc); 3978227364Sadrian} 3979227364Sadrian 3980227364Sadrian/* 3981227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3982227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3983227364Sadrian * buffers. 3984227364Sadrian * 3985227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3986227364Sadrian */ 3987227364Sadrianstatic int 3988227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3989227364Sadrian ath_bufhead *bf_q) 3990227364Sadrian{ 3991227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3992227364Sadrian struct ath_node *an = ATH_NODE(ni); 3993227364Sadrian int tid = bf->bf_state.bfs_tid; 3994227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3995227364Sadrian 3996243786Sadrian ATH_TX_LOCK_ASSERT(sc); 3997227364Sadrian 3998240255Sadrian /* XXX clr11naggr should be done for all subframes */ 3999227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4000227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 4001240639Sadrian 4002227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 4003227364Sadrian 4004227364Sadrian /* 4005227364Sadrian * If the buffer is marked as busy, we can't directly 4006227364Sadrian * reuse it. Instead, try to clone the buffer. 4007227364Sadrian * If the clone is successful, recycle the old buffer. 4008227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 4009227364Sadrian * to force the next bit of code to free the buffer 4010227364Sadrian * for us. 4011227364Sadrian */ 4012227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 4013227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 4014227364Sadrian struct ath_buf *nbf; 4015227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 4016227364Sadrian if (nbf) 4017227364Sadrian /* bf has been freed at this point */ 4018227364Sadrian bf = nbf; 4019227364Sadrian else 4020227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 4021227364Sadrian } 4022227364Sadrian 4023227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 4024227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 4025227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 4026227364Sadrian "%s: max retries: seqno %d\n", 4027227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4028227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 4029227364Sadrian if (! bf->bf_state.bfs_addedbaw) 4030227364Sadrian device_printf(sc->sc_dev, 4031227364Sadrian "%s: wasn't added: seqno %d\n", 4032227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4033227364Sadrian bf->bf_state.bfs_dobaw = 0; 4034227364Sadrian return 1; 4035227364Sadrian } 4036227364Sadrian 4037227364Sadrian ath_tx_set_retry(sc, bf); 4038240639Sadrian sc->sc_stats.ast_tx_swretries++; 4039227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 4040227364Sadrian 4041240255Sadrian /* Clear the aggregate state */ 4042240255Sadrian bf->bf_state.bfs_aggr = 0; 4043240255Sadrian bf->bf_state.bfs_ndelim = 0; /* ??? needed? */ 4044240255Sadrian bf->bf_state.bfs_nframes = 1; 4045240255Sadrian 4046227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 4047227364Sadrian return 0; 4048227364Sadrian} 4049227364Sadrian 4050227364Sadrian/* 4051227364Sadrian * error pkt completion for an aggregate destination 4052227364Sadrian */ 4053227364Sadrianstatic void 4054227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 4055227364Sadrian struct ath_tid *tid) 4056227364Sadrian{ 4057227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 4058227364Sadrian struct ath_node *an = ATH_NODE(ni); 4059227364Sadrian struct ath_buf *bf_next, *bf; 4060227364Sadrian ath_bufhead bf_q; 4061227364Sadrian int drops = 0; 4062227364Sadrian struct ieee80211_tx_ampdu *tap; 4063227364Sadrian ath_bufhead bf_cq; 4064227364Sadrian 4065227364Sadrian TAILQ_INIT(&bf_q); 4066227364Sadrian TAILQ_INIT(&bf_cq); 4067227364Sadrian 4068227364Sadrian /* 4069227364Sadrian * Update rate control - all frames have failed. 4070227364Sadrian * 4071227364Sadrian * XXX use the length in the first frame in the series; 4072227364Sadrian * XXX just so things are consistent for now. 4073227364Sadrian */ 4074227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 4075227364Sadrian &bf_first->bf_status.ds_txstat, 4076227364Sadrian bf_first->bf_state.bfs_pktlen, 4077227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 4078227364Sadrian 4079243786Sadrian ATH_TX_LOCK(sc); 4080227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 4081227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 4082227364Sadrian 4083227364Sadrian /* Retry all subframes */ 4084227364Sadrian bf = bf_first; 4085227364Sadrian while (bf) { 4086227364Sadrian bf_next = bf->bf_next; 4087227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 4088227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 4089227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 4090227364Sadrian drops++; 4091227364Sadrian bf->bf_next = NULL; 4092227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 4093227364Sadrian } 4094227364Sadrian bf = bf_next; 4095227364Sadrian } 4096227364Sadrian 4097227364Sadrian /* Prepend all frames to the beginning of the queue */ 4098227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 4099227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 4100241336Sadrian ATH_TID_INSERT_HEAD(tid, bf, bf_list); 4101227364Sadrian } 4102227364Sadrian 4103234725Sadrian /* 4104234725Sadrian * Schedule the TID to be re-tried. 4105234725Sadrian */ 4106227364Sadrian ath_tx_tid_sched(sc, tid); 4107227364Sadrian 4108227364Sadrian /* 4109227364Sadrian * send bar if we dropped any frames 4110227364Sadrian * 4111227364Sadrian * Keep the txq lock held for now, as we need to ensure 4112227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 4113227364Sadrian * in the ifnet TX context or raw TX context.) 4114227364Sadrian */ 4115227364Sadrian if (drops) { 4116233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 4117233908Sadrian ath_tx_tid_bar_suspend(sc, tid); 4118227364Sadrian } 4119227364Sadrian 4120233908Sadrian /* 4121233908Sadrian * Send BAR if required 4122233908Sadrian */ 4123233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, tid)) 4124233908Sadrian ath_tx_tid_bar_tx(sc, tid); 4125240639Sadrian 4126243786Sadrian ATH_TX_UNLOCK(sc); 4127233908Sadrian 4128227364Sadrian /* Complete frames which errored out */ 4129227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 4130227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 4131227364Sadrian ath_tx_default_comp(sc, bf, 0); 4132227364Sadrian } 4133227364Sadrian} 4134227364Sadrian 4135227364Sadrian/* 4136227364Sadrian * Handle clean-up of packets from an aggregate list. 4137227364Sadrian * 4138227364Sadrian * There's no need to update the BAW here - the session is being 4139227364Sadrian * torn down. 4140227364Sadrian */ 4141227364Sadrianstatic void 4142227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 4143227364Sadrian{ 4144227364Sadrian struct ath_buf *bf, *bf_next; 4145227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 4146227364Sadrian struct ath_node *an = ATH_NODE(ni); 4147227364Sadrian int tid = bf_first->bf_state.bfs_tid; 4148227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4149227364Sadrian 4150243786Sadrian ATH_TX_LOCK(sc); 4151227364Sadrian 4152227364Sadrian /* update incomp */ 4153248341Sadrian bf = bf_first; 4154227364Sadrian while (bf) { 4155227364Sadrian atid->incomp--; 4156227364Sadrian bf = bf->bf_next; 4157227364Sadrian } 4158227364Sadrian 4159227364Sadrian if (atid->incomp == 0) { 4160227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4161227364Sadrian "%s: TID %d: cleaned up! resume!\n", 4162227364Sadrian __func__, tid); 4163227364Sadrian atid->cleanup_inprogress = 0; 4164227364Sadrian ath_tx_tid_resume(sc, atid); 4165227364Sadrian } 4166233908Sadrian 4167233908Sadrian /* Send BAR if required */ 4168240639Sadrian /* XXX why would we send a BAR when transitioning to non-aggregation? */ 4169248341Sadrian /* 4170248341Sadrian * XXX TODO: we should likely just tear down the BAR state here, 4171248341Sadrian * rather than sending a BAR. 4172248341Sadrian */ 4173233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4174233908Sadrian ath_tx_tid_bar_tx(sc, atid); 4175240639Sadrian 4176243786Sadrian ATH_TX_UNLOCK(sc); 4177227364Sadrian 4178227364Sadrian /* Handle frame completion */ 4179248341Sadrian bf = bf_first; 4180227364Sadrian while (bf) { 4181227364Sadrian bf_next = bf->bf_next; 4182227364Sadrian ath_tx_default_comp(sc, bf, 1); 4183227364Sadrian bf = bf_next; 4184227364Sadrian } 4185227364Sadrian} 4186227364Sadrian 4187227364Sadrian/* 4188227364Sadrian * Handle completion of an set of aggregate frames. 4189227364Sadrian * 4190227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 4191227364Sadrian * not the last descriptor in the first frame. 4192227364Sadrian */ 4193227364Sadrianstatic void 4194229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 4195229949Sadrian int fail) 4196227364Sadrian{ 4197227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 4198227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 4199227364Sadrian struct ath_node *an = ATH_NODE(ni); 4200227364Sadrian int tid = bf_first->bf_state.bfs_tid; 4201227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4202227364Sadrian struct ath_tx_status ts; 4203227364Sadrian struct ieee80211_tx_ampdu *tap; 4204227364Sadrian ath_bufhead bf_q; 4205227364Sadrian ath_bufhead bf_cq; 4206227364Sadrian int seq_st, tx_ok; 4207227364Sadrian int hasba, isaggr; 4208227364Sadrian uint32_t ba[2]; 4209227364Sadrian struct ath_buf *bf, *bf_next; 4210227364Sadrian int ba_index; 4211227364Sadrian int drops = 0; 4212227364Sadrian int nframes = 0, nbad = 0, nf; 4213227364Sadrian int pktlen; 4214227364Sadrian /* XXX there's too much on the stack? */ 4215236038Sadrian struct ath_rc_series rc[ATH_RC_NUM]; 4216227364Sadrian int txseq; 4217227364Sadrian 4218227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 4219227364Sadrian __func__, atid->hwq_depth); 4220227364Sadrian 4221240677Sadrian /* 4222240677Sadrian * Take a copy; this may be needed -after- bf_first 4223240677Sadrian * has been completed and freed. 4224240677Sadrian */ 4225240677Sadrian ts = bf_first->bf_status.ds_txstat; 4226240677Sadrian 4227240639Sadrian TAILQ_INIT(&bf_q); 4228240639Sadrian TAILQ_INIT(&bf_cq); 4229240639Sadrian 4230227364Sadrian /* The TID state is kept behind the TXQ lock */ 4231243786Sadrian ATH_TX_LOCK(sc); 4232227364Sadrian 4233227364Sadrian atid->hwq_depth--; 4234227364Sadrian if (atid->hwq_depth < 0) 4235227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 4236227364Sadrian __func__, atid->hwq_depth); 4237227364Sadrian 4238227364Sadrian /* 4239240639Sadrian * If the TID is filtered, handle completing the filter 4240240639Sadrian * transition before potentially kicking it to the cleanup 4241240639Sadrian * function. 4242240677Sadrian * 4243240677Sadrian * XXX this is duplicate work, ew. 4244240639Sadrian */ 4245240639Sadrian if (atid->isfiltered) 4246240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4247240639Sadrian 4248240639Sadrian /* 4249227364Sadrian * Punt cleanup to the relevant function, not our problem now 4250227364Sadrian */ 4251227364Sadrian if (atid->cleanup_inprogress) { 4252240639Sadrian if (atid->isfiltered) 4253240639Sadrian device_printf(sc->sc_dev, 4254240639Sadrian "%s: isfiltered=1, normal_comp?\n", 4255240639Sadrian __func__); 4256243786Sadrian ATH_TX_UNLOCK(sc); 4257227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 4258227364Sadrian return; 4259227364Sadrian } 4260227364Sadrian 4261227364Sadrian /* 4262240639Sadrian * If the frame is filtered, transition to filtered frame 4263240639Sadrian * mode and add this to the filtered frame list. 4264240639Sadrian * 4265240639Sadrian * XXX TODO: figure out how this interoperates with 4266240639Sadrian * BAR, pause and cleanup states. 4267240639Sadrian */ 4268240639Sadrian if ((ts.ts_status & HAL_TXERR_FILT) || 4269240639Sadrian (ts.ts_status != 0 && atid->isfiltered)) { 4270240639Sadrian if (fail != 0) 4271240639Sadrian device_printf(sc->sc_dev, 4272240639Sadrian "%s: isfiltered=1, fail=%d\n", __func__, fail); 4273240639Sadrian ath_tx_tid_filt_comp_aggr(sc, atid, bf_first, &bf_cq); 4274240639Sadrian 4275240639Sadrian /* Remove from BAW */ 4276240639Sadrian TAILQ_FOREACH_SAFE(bf, &bf_cq, bf_list, bf_next) { 4277240639Sadrian if (bf->bf_state.bfs_addedbaw) 4278240639Sadrian drops++; 4279240639Sadrian if (bf->bf_state.bfs_dobaw) { 4280240639Sadrian ath_tx_update_baw(sc, an, atid, bf); 4281240639Sadrian if (! bf->bf_state.bfs_addedbaw) 4282240639Sadrian device_printf(sc->sc_dev, 4283240639Sadrian "%s: wasn't added: seqno %d\n", 4284240639Sadrian __func__, 4285240639Sadrian SEQNO(bf->bf_state.bfs_seqno)); 4286240639Sadrian } 4287240639Sadrian bf->bf_state.bfs_dobaw = 0; 4288240639Sadrian } 4289240639Sadrian /* 4290240639Sadrian * If any intermediate frames in the BAW were dropped when 4291240639Sadrian * handling filtering things, send a BAR. 4292240639Sadrian */ 4293240639Sadrian if (drops) 4294240639Sadrian ath_tx_tid_bar_suspend(sc, atid); 4295240639Sadrian 4296240639Sadrian /* 4297240639Sadrian * Finish up by sending a BAR if required and freeing 4298240639Sadrian * the frames outside of the TX lock. 4299240639Sadrian */ 4300240639Sadrian goto finish_send_bar; 4301240639Sadrian } 4302240639Sadrian 4303240639Sadrian /* 4304227364Sadrian * XXX for now, use the first frame in the aggregate for 4305227364Sadrian * XXX rate control completion; it's at least consistent. 4306227364Sadrian */ 4307227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 4308227364Sadrian 4309227364Sadrian /* 4310235461Sadrian * Handle errors first! 4311235461Sadrian * 4312235461Sadrian * Here, handle _any_ error as a "exceeded retries" error. 4313235461Sadrian * Later on (when filtered frames are to be specially handled) 4314235461Sadrian * it'll have to be expanded. 4315227364Sadrian */ 4316235461Sadrian#if 0 4317227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 4318235461Sadrian#endif 4319235461Sadrian if (ts.ts_status != 0) { 4320243786Sadrian ATH_TX_UNLOCK(sc); 4321227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 4322227364Sadrian return; 4323227364Sadrian } 4324227364Sadrian 4325227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4326227364Sadrian 4327227364Sadrian /* 4328227364Sadrian * extract starting sequence and block-ack bitmap 4329227364Sadrian */ 4330227364Sadrian /* XXX endian-ness of seq_st, ba? */ 4331227364Sadrian seq_st = ts.ts_seqnum; 4332227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 4333227364Sadrian tx_ok = (ts.ts_status == 0); 4334227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 4335227364Sadrian ba[0] = ts.ts_ba_low; 4336227364Sadrian ba[1] = ts.ts_ba_high; 4337227364Sadrian 4338227364Sadrian /* 4339227364Sadrian * Copy the TX completion status and the rate control 4340227364Sadrian * series from the first descriptor, as it may be freed 4341227364Sadrian * before the rate control code can get its grubby fingers 4342227364Sadrian * into things. 4343227364Sadrian */ 4344227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 4345227364Sadrian 4346227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4347229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 4348229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 4349227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 4350227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 4351227364Sadrian 4352248091Sadrian /* 4353248091Sadrian * The reference driver doesn't do this; it simply ignores 4354248091Sadrian * this check in its entirety. 4355248091Sadrian * 4356248091Sadrian * I've seen this occur when using iperf to send traffic 4357248091Sadrian * out tid 1 - the aggregate frames are all marked as TID 1, 4358248091Sadrian * but the TXSTATUS has TID=0. So, let's just ignore this 4359248091Sadrian * check. 4360248091Sadrian */ 4361248091Sadrian#if 0 4362227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 4363227364Sadrian if (tid != ts.ts_tid) { 4364227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 4365227364Sadrian __func__, tid, ts.ts_tid); 4366227364Sadrian tx_ok = 0; 4367227364Sadrian } 4368248091Sadrian#endif 4369227364Sadrian 4370227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 4371227364Sadrian if (isaggr && tx_ok && (! hasba)) { 4372227364Sadrian device_printf(sc->sc_dev, 4373229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 4374229949Sadrian "seq_st=%d\n", 4375227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 4376227364Sadrian /* XXX TODO: schedule an interface reset */ 4377238350Sjhb#ifdef ATH_DEBUG 4378238338Sadrian ath_printtxbuf(sc, bf_first, 4379238338Sadrian sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0); 4380238350Sjhb#endif 4381227364Sadrian } 4382227364Sadrian 4383227364Sadrian /* 4384227364Sadrian * Walk the list of frames, figure out which ones were correctly 4385227364Sadrian * sent and which weren't. 4386227364Sadrian */ 4387227364Sadrian bf = bf_first; 4388227364Sadrian nf = bf_first->bf_state.bfs_nframes; 4389227364Sadrian 4390227364Sadrian /* bf_first is going to be invalid once this list is walked */ 4391227364Sadrian bf_first = NULL; 4392227364Sadrian 4393227364Sadrian /* 4394227364Sadrian * Walk the list of completed frames and determine 4395227364Sadrian * which need to be completed and which need to be 4396227364Sadrian * retransmitted. 4397227364Sadrian * 4398227364Sadrian * For completed frames, the completion functions need 4399227364Sadrian * to be called at the end of this function as the last 4400227364Sadrian * node reference may free the node. 4401227364Sadrian * 4402227364Sadrian * Finally, since the TXQ lock can't be held during the 4403227364Sadrian * completion callback (to avoid lock recursion), 4404227364Sadrian * the completion calls have to be done outside of the 4405227364Sadrian * lock. 4406227364Sadrian */ 4407227364Sadrian while (bf) { 4408227364Sadrian nframes++; 4409229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 4410229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 4411227364Sadrian bf_next = bf->bf_next; 4412227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 4413227364Sadrian 4414227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4415227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 4416227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 4417227364Sadrian ATH_BA_ISSET(ba, ba_index)); 4418227364Sadrian 4419227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 4420227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 4421227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 4422227364Sadrian bf->bf_state.bfs_dobaw = 0; 4423227364Sadrian if (! bf->bf_state.bfs_addedbaw) 4424227364Sadrian device_printf(sc->sc_dev, 4425227364Sadrian "%s: wasn't added: seqno %d\n", 4426227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4427227364Sadrian bf->bf_next = NULL; 4428227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 4429227364Sadrian } else { 4430227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 4431227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 4432227364Sadrian drops++; 4433227364Sadrian bf->bf_next = NULL; 4434227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 4435227364Sadrian } 4436227364Sadrian nbad++; 4437227364Sadrian } 4438227364Sadrian bf = bf_next; 4439227364Sadrian } 4440227364Sadrian 4441227364Sadrian /* 4442227364Sadrian * Now that the BAW updates have been done, unlock 4443227364Sadrian * 4444227364Sadrian * txseq is grabbed before the lock is released so we 4445227364Sadrian * have a consistent view of what -was- in the BAW. 4446227364Sadrian * Anything after this point will not yet have been 4447227364Sadrian * TXed. 4448227364Sadrian */ 4449227364Sadrian txseq = tap->txa_start; 4450243786Sadrian ATH_TX_UNLOCK(sc); 4451227364Sadrian 4452227364Sadrian if (nframes != nf) 4453227364Sadrian device_printf(sc->sc_dev, 4454227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 4455227364Sadrian __func__, nframes, nf); 4456227364Sadrian 4457227364Sadrian /* 4458227364Sadrian * Now we know how many frames were bad, call the rate 4459227364Sadrian * control code. 4460227364Sadrian */ 4461227364Sadrian if (fail == 0) 4462229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 4463229949Sadrian nbad); 4464227364Sadrian 4465227364Sadrian /* 4466227364Sadrian * send bar if we dropped any frames 4467227364Sadrian */ 4468227364Sadrian if (drops) { 4469233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 4470243786Sadrian ATH_TX_LOCK(sc); 4471233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 4472243786Sadrian ATH_TX_UNLOCK(sc); 4473227364Sadrian } 4474227364Sadrian 4475234725Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4476234725Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 4477234725Sadrian 4478243786Sadrian ATH_TX_LOCK(sc); 4479234725Sadrian 4480227364Sadrian /* Prepend all frames to the beginning of the queue */ 4481227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 4482227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 4483241336Sadrian ATH_TID_INSERT_HEAD(atid, bf, bf_list); 4484227364Sadrian } 4485234725Sadrian 4486234725Sadrian /* 4487234725Sadrian * Reschedule to grab some further frames. 4488234725Sadrian */ 4489227364Sadrian ath_tx_tid_sched(sc, atid); 4490227364Sadrian 4491233908Sadrian /* 4492240639Sadrian * If the queue is filtered, re-schedule as required. 4493240639Sadrian * 4494240639Sadrian * This is required as there may be a subsequent TX descriptor 4495240639Sadrian * for this end-node that has CLRDMASK set, so it's quite possible 4496240639Sadrian * that a filtered frame will be followed by a non-filtered 4497240639Sadrian * (complete or otherwise) frame. 4498240639Sadrian * 4499240639Sadrian * XXX should we do this before we complete the frame? 4500240639Sadrian */ 4501240639Sadrian if (atid->isfiltered) 4502240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4503240639Sadrian 4504240639Sadrianfinish_send_bar: 4505240639Sadrian 4506240639Sadrian /* 4507233908Sadrian * Send BAR if required 4508233908Sadrian */ 4509233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4510233908Sadrian ath_tx_tid_bar_tx(sc, atid); 4511234725Sadrian 4512243786Sadrian ATH_TX_UNLOCK(sc); 4513233908Sadrian 4514227364Sadrian /* Do deferred completion */ 4515227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 4516227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 4517227364Sadrian ath_tx_default_comp(sc, bf, 0); 4518227364Sadrian } 4519227364Sadrian} 4520227364Sadrian 4521227364Sadrian/* 4522227364Sadrian * Handle completion of unaggregated frames in an ADDBA 4523227364Sadrian * session. 4524227364Sadrian * 4525227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 4526227364Sadrian * ath_tx_draintxq(). 4527227364Sadrian */ 4528227364Sadrianstatic void 4529227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 4530227364Sadrian{ 4531227364Sadrian struct ieee80211_node *ni = bf->bf_node; 4532227364Sadrian struct ath_node *an = ATH_NODE(ni); 4533227364Sadrian int tid = bf->bf_state.bfs_tid; 4534227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4535240677Sadrian struct ath_tx_status ts; 4536240639Sadrian int drops = 0; 4537227364Sadrian 4538227364Sadrian /* 4539240677Sadrian * Take a copy of this; filtering/cloning the frame may free the 4540240677Sadrian * bf pointer. 4541240677Sadrian */ 4542240677Sadrian ts = bf->bf_status.ds_txstat; 4543240677Sadrian 4544240677Sadrian /* 4545227364Sadrian * Update rate control status here, before we possibly 4546227364Sadrian * punt to retry or cleanup. 4547227364Sadrian * 4548227364Sadrian * Do it outside of the TXQ lock. 4549227364Sadrian */ 4550233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 4551227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 4552227364Sadrian &bf->bf_status.ds_txstat, 4553227364Sadrian bf->bf_state.bfs_pktlen, 4554240677Sadrian 1, (ts.ts_status == 0) ? 0 : 1); 4555227364Sadrian 4556227364Sadrian /* 4557227364Sadrian * This is called early so atid->hwq_depth can be tracked. 4558227364Sadrian * This unfortunately means that it's released and regrabbed 4559227364Sadrian * during retry and cleanup. That's rather inefficient. 4560227364Sadrian */ 4561243786Sadrian ATH_TX_LOCK(sc); 4562227364Sadrian 4563227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4564227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 4565227364Sadrian 4566229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 4567229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 4568229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 4569229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 4570227364Sadrian 4571227364Sadrian atid->hwq_depth--; 4572227364Sadrian if (atid->hwq_depth < 0) 4573227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 4574227364Sadrian __func__, atid->hwq_depth); 4575227364Sadrian 4576227364Sadrian /* 4577240639Sadrian * If the TID is filtered, handle completing the filter 4578240639Sadrian * transition before potentially kicking it to the cleanup 4579240639Sadrian * function. 4580240639Sadrian */ 4581240639Sadrian if (atid->isfiltered) 4582240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4583240639Sadrian 4584240639Sadrian /* 4585227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 4586227364Sadrian * rather than handling it here. It's thus their 4587227364Sadrian * responsibility to clean up, call the completion 4588227364Sadrian * function in net80211, etc. 4589227364Sadrian */ 4590227364Sadrian if (atid->cleanup_inprogress) { 4591240639Sadrian if (atid->isfiltered) 4592240639Sadrian device_printf(sc->sc_dev, 4593240639Sadrian "%s: isfiltered=1, normal_comp?\n", 4594240639Sadrian __func__); 4595243786Sadrian ATH_TX_UNLOCK(sc); 4596229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 4597229949Sadrian __func__); 4598227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 4599227364Sadrian return; 4600227364Sadrian } 4601227364Sadrian 4602227364Sadrian /* 4603240639Sadrian * XXX TODO: how does cleanup, BAR and filtered frame handling 4604240639Sadrian * overlap? 4605240639Sadrian * 4606240639Sadrian * If the frame is filtered OR if it's any failure but 4607240639Sadrian * the TID is filtered, the frame must be added to the 4608240639Sadrian * filtered frame list. 4609240639Sadrian * 4610240639Sadrian * However - a busy buffer can't be added to the filtered 4611240639Sadrian * list as it will end up being recycled without having 4612240639Sadrian * been made available for the hardware. 4613240639Sadrian */ 4614240677Sadrian if ((ts.ts_status & HAL_TXERR_FILT) || 4615240677Sadrian (ts.ts_status != 0 && atid->isfiltered)) { 4616240639Sadrian int freeframe; 4617240639Sadrian 4618240639Sadrian if (fail != 0) 4619240639Sadrian device_printf(sc->sc_dev, 4620240639Sadrian "%s: isfiltered=1, fail=%d\n", 4621240639Sadrian __func__, 4622240639Sadrian fail); 4623240639Sadrian freeframe = ath_tx_tid_filt_comp_single(sc, atid, bf); 4624240639Sadrian if (freeframe) { 4625240639Sadrian /* Remove from BAW */ 4626240639Sadrian if (bf->bf_state.bfs_addedbaw) 4627240639Sadrian drops++; 4628240639Sadrian if (bf->bf_state.bfs_dobaw) { 4629240639Sadrian ath_tx_update_baw(sc, an, atid, bf); 4630240639Sadrian if (! bf->bf_state.bfs_addedbaw) 4631240639Sadrian device_printf(sc->sc_dev, 4632240639Sadrian "%s: wasn't added: seqno %d\n", 4633240639Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4634240639Sadrian } 4635240639Sadrian bf->bf_state.bfs_dobaw = 0; 4636240639Sadrian } 4637240639Sadrian 4638240639Sadrian /* 4639240639Sadrian * If the frame couldn't be filtered, treat it as a drop and 4640240639Sadrian * prepare to send a BAR. 4641240639Sadrian */ 4642240639Sadrian if (freeframe && drops) 4643240639Sadrian ath_tx_tid_bar_suspend(sc, atid); 4644240639Sadrian 4645240639Sadrian /* 4646240639Sadrian * Send BAR if required 4647240639Sadrian */ 4648240639Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4649240639Sadrian ath_tx_tid_bar_tx(sc, atid); 4650240639Sadrian 4651243786Sadrian ATH_TX_UNLOCK(sc); 4652240639Sadrian /* 4653240639Sadrian * If freeframe is set, then the frame couldn't be 4654240639Sadrian * cloned and bf is still valid. Just complete/free it. 4655240639Sadrian */ 4656240639Sadrian if (freeframe) 4657240639Sadrian ath_tx_default_comp(sc, bf, fail); 4658240639Sadrian 4659240639Sadrian 4660240639Sadrian return; 4661240639Sadrian } 4662240639Sadrian /* 4663227364Sadrian * Don't bother with the retry check if all frames 4664227364Sadrian * are being failed (eg during queue deletion.) 4665227364Sadrian */ 4666235461Sadrian#if 0 4667227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 4668235461Sadrian#endif 4669240677Sadrian if (fail == 0 && ts.ts_status != 0) { 4670243786Sadrian ATH_TX_UNLOCK(sc); 4671229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 4672229949Sadrian __func__); 4673227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 4674227364Sadrian return; 4675227364Sadrian } 4676227364Sadrian 4677227364Sadrian /* Success? Complete */ 4678227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 4679227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 4680227364Sadrian if (bf->bf_state.bfs_dobaw) { 4681227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 4682227364Sadrian bf->bf_state.bfs_dobaw = 0; 4683227364Sadrian if (! bf->bf_state.bfs_addedbaw) 4684227364Sadrian device_printf(sc->sc_dev, 4685227364Sadrian "%s: wasn't added: seqno %d\n", 4686227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 4687227364Sadrian } 4688227364Sadrian 4689233908Sadrian /* 4690240639Sadrian * If the queue is filtered, re-schedule as required. 4691240639Sadrian * 4692240639Sadrian * This is required as there may be a subsequent TX descriptor 4693240639Sadrian * for this end-node that has CLRDMASK set, so it's quite possible 4694240639Sadrian * that a filtered frame will be followed by a non-filtered 4695240639Sadrian * (complete or otherwise) frame. 4696240639Sadrian * 4697240639Sadrian * XXX should we do this before we complete the frame? 4698240639Sadrian */ 4699240639Sadrian if (atid->isfiltered) 4700240639Sadrian ath_tx_tid_filt_comp_complete(sc, atid); 4701240639Sadrian 4702240639Sadrian /* 4703233908Sadrian * Send BAR if required 4704233908Sadrian */ 4705233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 4706233908Sadrian ath_tx_tid_bar_tx(sc, atid); 4707233908Sadrian 4708243786Sadrian ATH_TX_UNLOCK(sc); 4709227364Sadrian 4710227364Sadrian ath_tx_default_comp(sc, bf, fail); 4711227364Sadrian /* bf is freed at this point */ 4712227364Sadrian} 4713227364Sadrian 4714227364Sadrianvoid 4715227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 4716227364Sadrian{ 4717227364Sadrian if (bf->bf_state.bfs_aggr) 4718227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 4719227364Sadrian else 4720227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 4721227364Sadrian} 4722227364Sadrian 4723227364Sadrian/* 4724227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4725227364Sadrian * 4726227364Sadrian * This is the aggregate version. 4727227364Sadrian */ 4728227364Sadrianvoid 4729227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 4730227364Sadrian struct ath_tid *tid) 4731227364Sadrian{ 4732227364Sadrian struct ath_buf *bf; 4733227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4734227364Sadrian struct ieee80211_tx_ampdu *tap; 4735227364Sadrian ATH_AGGR_STATUS status; 4736227364Sadrian ath_bufhead bf_q; 4737227364Sadrian 4738227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 4739243786Sadrian ATH_TX_LOCK_ASSERT(sc); 4740227364Sadrian 4741227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 4742227364Sadrian 4743227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 4744227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 4745227364Sadrian __func__); 4746227364Sadrian 4747227364Sadrian for (;;) { 4748227364Sadrian status = ATH_AGGR_DONE; 4749227364Sadrian 4750227364Sadrian /* 4751227364Sadrian * If the upper layer has paused the TID, don't 4752227364Sadrian * queue any further packets. 4753227364Sadrian * 4754227364Sadrian * This can also occur from the completion task because 4755227364Sadrian * of packet loss; but as its serialised with this code, 4756227364Sadrian * it won't "appear" half way through queuing packets. 4757227364Sadrian */ 4758227364Sadrian if (tid->paused) 4759227364Sadrian break; 4760227364Sadrian 4761241336Sadrian bf = ATH_TID_FIRST(tid); 4762227364Sadrian if (bf == NULL) { 4763227364Sadrian break; 4764227364Sadrian } 4765227364Sadrian 4766227364Sadrian /* 4767227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 4768227364Sadrian * data frame), schedule it directly; continue. 4769227364Sadrian */ 4770227364Sadrian if (! bf->bf_state.bfs_dobaw) { 4771229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4772229949Sadrian "%s: non-baw packet\n", 4773227364Sadrian __func__); 4774241336Sadrian ATH_TID_REMOVE(tid, bf, bf_list); 4775240180Sadrian 4776240180Sadrian if (bf->bf_state.bfs_nframes > 1) 4777240180Sadrian device_printf(sc->sc_dev, 4778240180Sadrian "%s: aggr=%d, nframes=%d\n", 4779240180Sadrian __func__, 4780240180Sadrian bf->bf_state.bfs_aggr, 4781240180Sadrian bf->bf_state.bfs_nframes); 4782240180Sadrian 4783240180Sadrian /* 4784240180Sadrian * This shouldn't happen - such frames shouldn't 4785240180Sadrian * ever have been queued as an aggregate in the 4786240180Sadrian * first place. However, make sure the fields 4787240180Sadrian * are correctly setup just to be totally sure. 4788240180Sadrian */ 4789227364Sadrian bf->bf_state.bfs_aggr = 0; 4790240180Sadrian bf->bf_state.bfs_nframes = 1; 4791240180Sadrian 4792240724Sadrian /* Update CLRDMASK just before this frame is queued */ 4793240724Sadrian ath_tx_update_clrdmask(sc, tid, bf); 4794240724Sadrian 4795227364Sadrian ath_tx_do_ratelookup(sc, bf); 4796233989Sadrian ath_tx_calc_duration(sc, bf); 4797233989Sadrian ath_tx_calc_protection(sc, bf); 4798233989Sadrian ath_tx_set_rtscts(sc, bf); 4799227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4800227364Sadrian ath_tx_setds(sc, bf); 4801227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4802227364Sadrian 4803227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 4804227364Sadrian 4805227364Sadrian /* Queue the packet; continue */ 4806227364Sadrian goto queuepkt; 4807227364Sadrian } 4808227364Sadrian 4809227364Sadrian TAILQ_INIT(&bf_q); 4810227364Sadrian 4811227364Sadrian /* 4812227364Sadrian * Do a rate control lookup on the first frame in the 4813227364Sadrian * list. The rate control code needs that to occur 4814227364Sadrian * before it can determine whether to TX. 4815227364Sadrian * It's inaccurate because the rate control code doesn't 4816227364Sadrian * really "do" aggregate lookups, so it only considers 4817227364Sadrian * the size of the first frame. 4818227364Sadrian */ 4819227364Sadrian ath_tx_do_ratelookup(sc, bf); 4820227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 4821227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 4822233989Sadrian 4823233989Sadrian ath_tx_calc_duration(sc, bf); 4824233989Sadrian ath_tx_calc_protection(sc, bf); 4825233989Sadrian 4826233989Sadrian ath_tx_set_rtscts(sc, bf); 4827227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4828227364Sadrian 4829227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 4830227364Sadrian 4831227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4832227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 4833227364Sadrian 4834227364Sadrian /* 4835227364Sadrian * No frames to be picked up - out of BAW 4836227364Sadrian */ 4837227364Sadrian if (TAILQ_EMPTY(&bf_q)) 4838227364Sadrian break; 4839227364Sadrian 4840227364Sadrian /* 4841227364Sadrian * This assumes that the descriptor list in the ath_bufhead 4842227364Sadrian * are already linked together via bf_next pointers. 4843227364Sadrian */ 4844227364Sadrian bf = TAILQ_FIRST(&bf_q); 4845227364Sadrian 4846233989Sadrian if (status == ATH_AGGR_8K_LIMITED) 4847233989Sadrian sc->sc_aggr_stats.aggr_rts_aggr_limited++; 4848233989Sadrian 4849227364Sadrian /* 4850227364Sadrian * If it's the only frame send as non-aggregate 4851227364Sadrian * assume that ath_tx_form_aggr() has checked 4852227364Sadrian * whether it's in the BAW and added it appropriately. 4853227364Sadrian */ 4854227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 4855227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4856227364Sadrian "%s: single-frame aggregate\n", __func__); 4857240724Sadrian 4858240724Sadrian /* Update CLRDMASK just before this frame is queued */ 4859240724Sadrian ath_tx_update_clrdmask(sc, tid, bf); 4860240724Sadrian 4861227364Sadrian bf->bf_state.bfs_aggr = 0; 4862240255Sadrian bf->bf_state.bfs_ndelim = 0; 4863227364Sadrian ath_tx_setds(sc, bf); 4864227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4865227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 4866227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 4867227364Sadrian else 4868227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 4869227364Sadrian } else { 4870227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4871229949Sadrian "%s: multi-frame aggregate: %d frames, " 4872229949Sadrian "length %d\n", 4873227364Sadrian __func__, bf->bf_state.bfs_nframes, 4874227364Sadrian bf->bf_state.bfs_al); 4875227364Sadrian bf->bf_state.bfs_aggr = 1; 4876227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 4877227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 4878227364Sadrian 4879240724Sadrian /* Update CLRDMASK just before this frame is queued */ 4880240724Sadrian ath_tx_update_clrdmask(sc, tid, bf); 4881240724Sadrian 4882227364Sadrian /* 4883233989Sadrian * Calculate the duration/protection as required. 4884233989Sadrian */ 4885233989Sadrian ath_tx_calc_duration(sc, bf); 4886233989Sadrian ath_tx_calc_protection(sc, bf); 4887233989Sadrian 4888233989Sadrian /* 4889227364Sadrian * Update the rate and rtscts information based on the 4890227364Sadrian * rate decision made by the rate control code; 4891227364Sadrian * the first frame in the aggregate needs it. 4892227364Sadrian */ 4893227364Sadrian ath_tx_set_rtscts(sc, bf); 4894227364Sadrian 4895227364Sadrian /* 4896227364Sadrian * Setup the relevant descriptor fields 4897227364Sadrian * for aggregation. The first descriptor 4898227364Sadrian * already points to the rest in the chain. 4899227364Sadrian */ 4900227364Sadrian ath_tx_setds_11n(sc, bf); 4901227364Sadrian 4902227364Sadrian } 4903227364Sadrian queuepkt: 4904227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 4905227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 4906227364Sadrian 4907227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 4908227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 4909227364Sadrian 4910227364Sadrian /* Punt to txq */ 4911227364Sadrian ath_tx_handoff(sc, txq, bf); 4912227364Sadrian 4913227364Sadrian /* Track outstanding buffer count to hardware */ 4914227364Sadrian /* aggregates are "one" buffer */ 4915227364Sadrian tid->hwq_depth++; 4916227364Sadrian 4917227364Sadrian /* 4918227364Sadrian * Break out if ath_tx_form_aggr() indicated 4919227364Sadrian * there can't be any further progress (eg BAW is full.) 4920227364Sadrian * Checking for an empty txq is done above. 4921227364Sadrian * 4922227364Sadrian * XXX locking on txq here? 4923227364Sadrian */ 4924227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 4925227364Sadrian status == ATH_AGGR_BAW_CLOSED) 4926227364Sadrian break; 4927227364Sadrian } 4928227364Sadrian} 4929227364Sadrian 4930227364Sadrian/* 4931227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4932227364Sadrian */ 4933227364Sadrianvoid 4934227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 4935227364Sadrian struct ath_tid *tid) 4936227364Sadrian{ 4937227364Sadrian struct ath_buf *bf; 4938227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4939227364Sadrian 4940227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 4941227364Sadrian __func__, an, tid->tid); 4942227364Sadrian 4943243786Sadrian ATH_TX_LOCK_ASSERT(sc); 4944227364Sadrian 4945227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 4946227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 4947227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 4948227364Sadrian __func__, tid->tid); 4949227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 4950227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 4951227364Sadrian __func__, tid->tid); 4952227364Sadrian 4953227364Sadrian for (;;) { 4954227364Sadrian 4955227364Sadrian /* 4956227364Sadrian * If the upper layers have paused the TID, don't 4957227364Sadrian * queue any further packets. 4958227364Sadrian */ 4959227364Sadrian if (tid->paused) 4960227364Sadrian break; 4961227364Sadrian 4962241336Sadrian bf = ATH_TID_FIRST(tid); 4963227364Sadrian if (bf == NULL) { 4964227364Sadrian break; 4965227364Sadrian } 4966227364Sadrian 4967241336Sadrian ATH_TID_REMOVE(tid, bf, bf_list); 4968227364Sadrian 4969227364Sadrian /* Sanity check! */ 4970227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 4971227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 4972227364Sadrian " tid %d\n", 4973227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 4974227364Sadrian } 4975227364Sadrian /* Normal completion handler */ 4976227364Sadrian bf->bf_comp = ath_tx_normal_comp; 4977227364Sadrian 4978240883Sadrian /* 4979240883Sadrian * Override this for now, until the non-aggregate 4980240883Sadrian * completion handler correctly handles software retransmits. 4981240883Sadrian */ 4982240883Sadrian bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK; 4983240883Sadrian 4984240724Sadrian /* Update CLRDMASK just before this frame is queued */ 4985240724Sadrian ath_tx_update_clrdmask(sc, tid, bf); 4986240724Sadrian 4987227364Sadrian /* Program descriptors + rate control */ 4988227364Sadrian ath_tx_do_ratelookup(sc, bf); 4989233989Sadrian ath_tx_calc_duration(sc, bf); 4990233989Sadrian ath_tx_calc_protection(sc, bf); 4991233989Sadrian ath_tx_set_rtscts(sc, bf); 4992227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4993227364Sadrian ath_tx_setds(sc, bf); 4994227364Sadrian 4995227364Sadrian /* Track outstanding buffer count to hardware */ 4996227364Sadrian /* aggregates are "one" buffer */ 4997227364Sadrian tid->hwq_depth++; 4998227364Sadrian 4999227364Sadrian /* Punt to hardware or software txq */ 5000227364Sadrian ath_tx_handoff(sc, txq, bf); 5001227364Sadrian } 5002227364Sadrian} 5003227364Sadrian 5004227364Sadrian/* 5005227364Sadrian * Schedule some packets to the given hardware queue. 5006227364Sadrian * 5007227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 5008227364Sadrian * with queued traffic) and attempts to schedule traffic 5009227364Sadrian * from them. 5010227364Sadrian * 5011227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 5012227364Sadrian * added to the end of the queue after some frames have been 5013227364Sadrian * scheduled. 5014227364Sadrian */ 5015227364Sadrianvoid 5016227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 5017227364Sadrian{ 5018227364Sadrian struct ath_tid *tid, *next, *last; 5019227364Sadrian 5020243786Sadrian ATH_TX_LOCK_ASSERT(sc); 5021227364Sadrian 5022227364Sadrian /* 5023227364Sadrian * Don't schedule if the hardware queue is busy. 5024227364Sadrian * This (hopefully) gives some more time to aggregate 5025227364Sadrian * some packets in the aggregation queue. 5026227364Sadrian */ 5027227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 5028227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 5029227364Sadrian return; 5030227364Sadrian } 5031227364Sadrian 5032227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 5033227364Sadrian 5034227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 5035227364Sadrian /* 5036227364Sadrian * Suspend paused queues here; they'll be resumed 5037227364Sadrian * once the addba completes or times out. 5038227364Sadrian */ 5039227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 5040227364Sadrian __func__, tid->tid, tid->paused); 5041227364Sadrian ath_tx_tid_unsched(sc, tid); 5042227364Sadrian if (tid->paused) { 5043227364Sadrian continue; 5044227364Sadrian } 5045227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 5046227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 5047227364Sadrian else 5048227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 5049227364Sadrian 5050227364Sadrian /* Not empty? Re-schedule */ 5051227364Sadrian if (tid->axq_depth != 0) 5052227364Sadrian ath_tx_tid_sched(sc, tid); 5053227364Sadrian 5054227364Sadrian /* Give the software queue time to aggregate more packets */ 5055227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 5056227364Sadrian break; 5057227364Sadrian } 5058227364Sadrian 5059227364Sadrian /* 5060227364Sadrian * If this was the last entry on the original list, stop. 5061227364Sadrian * Otherwise nodes that have been rescheduled onto the end 5062227364Sadrian * of the TID FIFO list will just keep being rescheduled. 5063227364Sadrian */ 5064227364Sadrian if (tid == last) 5065227364Sadrian break; 5066227364Sadrian } 5067227364Sadrian} 5068227364Sadrian 5069227364Sadrian/* 5070227364Sadrian * TX addba handling 5071227364Sadrian */ 5072227364Sadrian 5073227364Sadrian/* 5074227364Sadrian * Return net80211 TID struct pointer, or NULL for none 5075227364Sadrian */ 5076227364Sadrianstruct ieee80211_tx_ampdu * 5077227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 5078227364Sadrian{ 5079227364Sadrian struct ieee80211_node *ni = &an->an_node; 5080227364Sadrian struct ieee80211_tx_ampdu *tap; 5081227364Sadrian 5082227364Sadrian if (tid == IEEE80211_NONQOS_TID) 5083227364Sadrian return NULL; 5084227364Sadrian 5085234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 5086227364Sadrian return tap; 5087227364Sadrian} 5088227364Sadrian 5089227364Sadrian/* 5090227364Sadrian * Is AMPDU-TX running? 5091227364Sadrian */ 5092227364Sadrianstatic int 5093227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 5094227364Sadrian{ 5095227364Sadrian struct ieee80211_tx_ampdu *tap; 5096227364Sadrian 5097227364Sadrian if (tid == IEEE80211_NONQOS_TID) 5098227364Sadrian return 0; 5099227364Sadrian 5100227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 5101227364Sadrian if (tap == NULL) 5102227364Sadrian return 0; /* Not valid; default to not running */ 5103227364Sadrian 5104227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 5105227364Sadrian} 5106227364Sadrian 5107227364Sadrian/* 5108227364Sadrian * Is AMPDU-TX negotiation pending? 5109227364Sadrian */ 5110227364Sadrianstatic int 5111227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 5112227364Sadrian{ 5113227364Sadrian struct ieee80211_tx_ampdu *tap; 5114227364Sadrian 5115227364Sadrian if (tid == IEEE80211_NONQOS_TID) 5116227364Sadrian return 0; 5117227364Sadrian 5118227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 5119227364Sadrian if (tap == NULL) 5120227364Sadrian return 0; /* Not valid; default to not pending */ 5121227364Sadrian 5122227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 5123227364Sadrian} 5124227364Sadrian 5125227364Sadrian/* 5126227364Sadrian * Is AMPDU-TX pending for the given TID? 5127227364Sadrian */ 5128227364Sadrian 5129227364Sadrian 5130227364Sadrian/* 5131227364Sadrian * Method to handle sending an ADDBA request. 5132227364Sadrian * 5133227364Sadrian * We tap this so the relevant flags can be set to pause the TID 5134227364Sadrian * whilst waiting for the response. 5135227364Sadrian * 5136227364Sadrian * XXX there's no timeout handler we can override? 5137227364Sadrian */ 5138227364Sadrianint 5139227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 5140227364Sadrian int dialogtoken, int baparamset, int batimeout) 5141227364Sadrian{ 5142227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5143234324Sadrian int tid = tap->txa_tid; 5144227364Sadrian struct ath_node *an = ATH_NODE(ni); 5145227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5146227364Sadrian 5147227364Sadrian /* 5148227364Sadrian * XXX danger Will Robinson! 5149227364Sadrian * 5150227364Sadrian * Although the taskqueue may be running and scheduling some more 5151227364Sadrian * packets, these should all be _before_ the addba sequence number. 5152227364Sadrian * However, net80211 will keep self-assigning sequence numbers 5153227364Sadrian * until addba has been negotiated. 5154227364Sadrian * 5155227364Sadrian * In the past, these packets would be "paused" (which still works 5156227364Sadrian * fine, as they're being scheduled to the driver in the same 5157227364Sadrian * serialised method which is calling the addba request routine) 5158227364Sadrian * and when the aggregation session begins, they'll be dequeued 5159227364Sadrian * as aggregate packets and added to the BAW. However, now there's 5160227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 5161227364Sadrian * packets. Thus they never get included in the BAW tracking and 5162227364Sadrian * this can cause the initial burst of packets after the addba 5163227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 5164227364Sadrian * 5165227364Sadrian * The "eventual" solution should be to tag these packets with 5166227364Sadrian * dobaw. Although net80211 has given us a sequence number, 5167227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 5168227364Sadrian * fall within it. 5169227364Sadrian */ 5170243786Sadrian ATH_TX_LOCK(sc); 5171235774Sadrian /* 5172235774Sadrian * This is a bit annoying. Until net80211 HT code inherits some 5173235774Sadrian * (any) locking, we may have this called in parallel BUT only 5174235774Sadrian * one response/timeout will be called. Grr. 5175235774Sadrian */ 5176235774Sadrian if (atid->addba_tx_pending == 0) { 5177235774Sadrian ath_tx_tid_pause(sc, atid); 5178235774Sadrian atid->addba_tx_pending = 1; 5179235774Sadrian } 5180243786Sadrian ATH_TX_UNLOCK(sc); 5181227364Sadrian 5182227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5183227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 5184227364Sadrian __func__, dialogtoken, baparamset, batimeout); 5185227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5186227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 5187227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 5188227364Sadrian 5189227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 5190227364Sadrian batimeout); 5191227364Sadrian} 5192227364Sadrian 5193227364Sadrian/* 5194227364Sadrian * Handle an ADDBA response. 5195227364Sadrian * 5196227364Sadrian * We unpause the queue so TX'ing can resume. 5197227364Sadrian * 5198227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 5199227364Sadrian * aggregate or not) so the BAW is updated. 5200227364Sadrian * 5201227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 5202227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 5203227364Sadrian * edge won't match the ni->ni_txseq. 5204227364Sadrian * 5205227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 5206227364Sadrian * ni->ni_txseq. 5207227364Sadrian * 5208227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 5209227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 5210227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 5211227364Sadrian * window. 5212227364Sadrian */ 5213227364Sadrianint 5214227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 5215227364Sadrian int status, int code, int batimeout) 5216227364Sadrian{ 5217227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5218234324Sadrian int tid = tap->txa_tid; 5219227364Sadrian struct ath_node *an = ATH_NODE(ni); 5220227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5221227364Sadrian int r; 5222227364Sadrian 5223227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5224227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 5225227364Sadrian status, code, batimeout); 5226227364Sadrian 5227227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5228227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 5229227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 5230227364Sadrian 5231227364Sadrian /* 5232227364Sadrian * Call this first, so the interface flags get updated 5233227364Sadrian * before the TID is unpaused. Otherwise a race condition 5234227364Sadrian * exists where the unpaused TID still doesn't yet have 5235227364Sadrian * IEEE80211_AGGR_RUNNING set. 5236227364Sadrian */ 5237227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 5238227364Sadrian 5239243786Sadrian ATH_TX_LOCK(sc); 5240235774Sadrian atid->addba_tx_pending = 0; 5241227364Sadrian /* 5242227364Sadrian * XXX dirty! 5243227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 5244227364Sadrian * Read above for more information. 5245227364Sadrian */ 5246227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 5247227364Sadrian ath_tx_tid_resume(sc, atid); 5248243786Sadrian ATH_TX_UNLOCK(sc); 5249227364Sadrian return r; 5250227364Sadrian} 5251227364Sadrian 5252227364Sadrian 5253227364Sadrian/* 5254227364Sadrian * Stop ADDBA on a queue. 5255237593Sadrian * 5256237593Sadrian * This can be called whilst BAR TX is currently active on the queue, 5257237593Sadrian * so make sure this is unblocked before continuing. 5258227364Sadrian */ 5259227364Sadrianvoid 5260227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 5261227364Sadrian{ 5262227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5263234324Sadrian int tid = tap->txa_tid; 5264227364Sadrian struct ath_node *an = ATH_NODE(ni); 5265227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5266227364Sadrian 5267227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 5268227364Sadrian 5269237593Sadrian /* 5270237593Sadrian * Pause TID traffic early, so there aren't any races 5271237593Sadrian * Unblock the pending BAR held traffic, if it's currently paused. 5272237593Sadrian */ 5273243786Sadrian ATH_TX_LOCK(sc); 5274227364Sadrian ath_tx_tid_pause(sc, atid); 5275237593Sadrian if (atid->bar_wait) { 5276237593Sadrian /* 5277237593Sadrian * bar_unsuspend() expects bar_tx == 1, as it should be 5278237593Sadrian * called from the TX completion path. This quietens 5279237593Sadrian * the warning. It's cleared for us anyway. 5280237593Sadrian */ 5281237593Sadrian atid->bar_tx = 1; 5282237593Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 5283237593Sadrian } 5284243786Sadrian ATH_TX_UNLOCK(sc); 5285227364Sadrian 5286227364Sadrian /* There's no need to hold the TXQ lock here */ 5287227364Sadrian sc->sc_addba_stop(ni, tap); 5288227364Sadrian 5289227364Sadrian /* 5290235749Sadrian * ath_tx_tid_cleanup will resume the TID if possible, otherwise 5291227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 5292227364Sadrian * things have been cleaned up. 5293227364Sadrian */ 5294235749Sadrian ath_tx_tid_cleanup(sc, an, tid); 5295227364Sadrian} 5296227364Sadrian 5297227364Sadrian/* 5298227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 5299227364Sadrian * it simply tears down the aggregation session. Ew. 5300227364Sadrian * 5301227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 5302227364Sadrian * ic->ic_addba_stop(). 5303227364Sadrian * 5304227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 5305227364Sadrian * XXX BAR TX success or failure should be better handled! 5306227364Sadrian */ 5307227364Sadrianvoid 5308227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 5309227364Sadrian int status) 5310227364Sadrian{ 5311227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5312234324Sadrian int tid = tap->txa_tid; 5313227364Sadrian struct ath_node *an = ATH_NODE(ni); 5314227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5315227364Sadrian int attempts = tap->txa_attempts; 5316227364Sadrian 5317235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 5318235676Sadrian "%s: called; tap=%p, atid=%p, txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n", 5319235491Sadrian __func__, 5320235676Sadrian tap, 5321235676Sadrian atid, 5322235676Sadrian tap->txa_tid, 5323235676Sadrian atid->tid, 5324235491Sadrian status, 5325235491Sadrian attempts); 5326227364Sadrian 5327227364Sadrian /* Note: This may update the BAW details */ 5328227364Sadrian sc->sc_bar_response(ni, tap, status); 5329227364Sadrian 5330227364Sadrian /* Unpause the TID */ 5331227364Sadrian /* 5332227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 5333227364Sadrian * XXX to a non-aggregate session. So we must unpause the 5334227364Sadrian * XXX TID here or it'll never be done. 5335240721Sadrian * 5336240721Sadrian * Also, don't call it if bar_tx/bar_wait are 0; something 5337240721Sadrian * has beaten us to the punch? (XXX figure out what?) 5338227364Sadrian */ 5339227364Sadrian if (status == 0 || attempts == 50) { 5340243786Sadrian ATH_TX_LOCK(sc); 5341240721Sadrian if (atid->bar_tx == 0 || atid->bar_wait == 0) 5342240721Sadrian device_printf(sc->sc_dev, 5343240721Sadrian "%s: huh? bar_tx=%d, bar_wait=%d\n", 5344240721Sadrian __func__, 5345240721Sadrian atid->bar_tx, atid->bar_wait); 5346240721Sadrian else 5347240721Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 5348243786Sadrian ATH_TX_UNLOCK(sc); 5349227364Sadrian } 5350227364Sadrian} 5351227364Sadrian 5352227364Sadrian/* 5353227364Sadrian * This is called whenever the pending ADDBA request times out. 5354227364Sadrian * Unpause and reschedule the TID. 5355227364Sadrian */ 5356227364Sadrianvoid 5357227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 5358227364Sadrian struct ieee80211_tx_ampdu *tap) 5359227364Sadrian{ 5360227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 5361234324Sadrian int tid = tap->txa_tid; 5362227364Sadrian struct ath_node *an = ATH_NODE(ni); 5363227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 5364227364Sadrian 5365227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 5366227364Sadrian "%s: called; resuming\n", __func__); 5367227364Sadrian 5368243786Sadrian ATH_TX_LOCK(sc); 5369235774Sadrian atid->addba_tx_pending = 0; 5370243786Sadrian ATH_TX_UNLOCK(sc); 5371235774Sadrian 5372227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 5373227364Sadrian sc->sc_addba_response_timeout(ni, tap); 5374227364Sadrian 5375227364Sadrian /* Unpause the TID; which reschedules it */ 5376243786Sadrian ATH_TX_LOCK(sc); 5377227364Sadrian ath_tx_tid_resume(sc, atid); 5378243786Sadrian ATH_TX_UNLOCK(sc); 5379227364Sadrian} 5380238710Sadrian 5381241170Sadrian/* 5382241170Sadrian * Check if a node is asleep or not. 5383241170Sadrian */ 5384242271Sadrianint 5385241170Sadrianath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an) 5386241170Sadrian{ 5387241170Sadrian 5388241170Sadrian ATH_NODE_LOCK_ASSERT(an); 5389241170Sadrian 5390241170Sadrian return (an->an_is_powersave); 5391241170Sadrian} 5392241170Sadrian 5393241170Sadrian/* 5394241170Sadrian * Mark a node as currently "in powersaving." 5395241170Sadrian * This suspends all traffic on the node. 5396241170Sadrian * 5397241170Sadrian * This must be called with the node/tx locks free. 5398241170Sadrian * 5399241170Sadrian * XXX TODO: the locking silliness below is due to how the node 5400241170Sadrian * locking currently works. Right now, the node lock is grabbed 5401241170Sadrian * to do rate control lookups and these are done with the TX 5402241170Sadrian * queue lock held. This means the node lock can't be grabbed 5403241170Sadrian * first here or a LOR will occur. 5404241170Sadrian * 5405241170Sadrian * Eventually (hopefully!) the TX path code will only grab 5406241170Sadrian * the TXQ lock when transmitting and the ath_node lock when 5407241170Sadrian * doing node/TID operations. There are other complications - 5408241170Sadrian * the sched/unsched operations involve walking the per-txq 5409241170Sadrian * 'active tid' list and this requires both locks to be held. 5410241170Sadrian */ 5411241170Sadrianvoid 5412241170Sadrianath_tx_node_sleep(struct ath_softc *sc, struct ath_node *an) 5413241170Sadrian{ 5414241170Sadrian struct ath_tid *atid; 5415241170Sadrian struct ath_txq *txq; 5416241170Sadrian int tid; 5417241170Sadrian 5418241170Sadrian ATH_NODE_UNLOCK_ASSERT(an); 5419241170Sadrian 5420241170Sadrian /* 5421241170Sadrian * It's possible that a parallel call to ath_tx_node_wakeup() 5422241170Sadrian * will unpause these queues. 5423241170Sadrian * 5424241170Sadrian * The node lock can't just be grabbed here, as there's places 5425241170Sadrian * in the driver where the node lock is grabbed _within_ a 5426241170Sadrian * TXQ lock. 5427241170Sadrian * So, we do this delicately and unwind state if needed. 5428241170Sadrian * 5429241170Sadrian * + Pause all the queues 5430241170Sadrian * + Grab the node lock 5431241170Sadrian * + If the queue is already asleep, unpause and quit 5432241170Sadrian * + else just mark as asleep. 5433241170Sadrian * 5434241170Sadrian * A parallel sleep() call will just pause and then 5435241170Sadrian * find they're already paused, so undo it. 5436241170Sadrian * 5437241170Sadrian * A parallel wakeup() call will check if asleep is 1 5438241170Sadrian * and if it's not (ie, it's 0), it'll treat it as already 5439241170Sadrian * being awake. If it's 1, it'll mark it as 0 and then 5440241170Sadrian * unpause everything. 5441241170Sadrian * 5442241170Sadrian * (Talk about a delicate hack.) 5443241170Sadrian */ 5444241170Sadrian 5445241170Sadrian /* Suspend all traffic on the node */ 5446243786Sadrian ATH_TX_LOCK(sc); 5447241170Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 5448241170Sadrian atid = &an->an_tid[tid]; 5449241170Sadrian txq = sc->sc_ac2q[atid->ac]; 5450241170Sadrian 5451241170Sadrian ath_tx_tid_pause(sc, atid); 5452241170Sadrian } 5453243786Sadrian ATH_TX_UNLOCK(sc); 5454241170Sadrian 5455241170Sadrian ATH_NODE_LOCK(an); 5456241170Sadrian 5457241170Sadrian /* In case of concurrency races from net80211.. */ 5458241170Sadrian if (an->an_is_powersave == 1) { 5459241170Sadrian ATH_NODE_UNLOCK(an); 5460241170Sadrian device_printf(sc->sc_dev, 5461241170Sadrian "%s: an=%p: node was already asleep\n", 5462241170Sadrian __func__, an); 5463243786Sadrian ATH_TX_LOCK(sc); 5464241170Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 5465241170Sadrian atid = &an->an_tid[tid]; 5466241170Sadrian txq = sc->sc_ac2q[atid->ac]; 5467241170Sadrian 5468241170Sadrian ath_tx_tid_resume(sc, atid); 5469241170Sadrian } 5470243786Sadrian ATH_TX_UNLOCK(sc); 5471241170Sadrian return; 5472241170Sadrian } 5473241170Sadrian 5474241170Sadrian /* Mark node as in powersaving */ 5475241170Sadrian an->an_is_powersave = 1; 5476241170Sadrian 5477241170Sadrian ATH_NODE_UNLOCK(an); 5478241170Sadrian} 5479241170Sadrian 5480241170Sadrian/* 5481241170Sadrian * Mark a node as currently "awake." 5482241170Sadrian * This resumes all traffic to the node. 5483241170Sadrian */ 5484241170Sadrianvoid 5485241170Sadrianath_tx_node_wakeup(struct ath_softc *sc, struct ath_node *an) 5486241170Sadrian{ 5487241170Sadrian struct ath_tid *atid; 5488241170Sadrian struct ath_txq *txq; 5489241170Sadrian int tid; 5490241170Sadrian 5491241170Sadrian ATH_NODE_UNLOCK_ASSERT(an); 5492241170Sadrian ATH_NODE_LOCK(an); 5493241170Sadrian 5494241170Sadrian /* In case of concurrency races from net80211.. */ 5495241170Sadrian if (an->an_is_powersave == 0) { 5496241170Sadrian ATH_NODE_UNLOCK(an); 5497241170Sadrian device_printf(sc->sc_dev, 5498241170Sadrian "%s: an=%p: node was already awake\n", 5499241170Sadrian __func__, an); 5500241170Sadrian return; 5501241170Sadrian } 5502241170Sadrian 5503241170Sadrian /* Mark node as awake */ 5504241170Sadrian an->an_is_powersave = 0; 5505241170Sadrian 5506241170Sadrian ATH_NODE_UNLOCK(an); 5507241170Sadrian 5508243786Sadrian ATH_TX_LOCK(sc); 5509241170Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 5510241170Sadrian atid = &an->an_tid[tid]; 5511241170Sadrian txq = sc->sc_ac2q[atid->ac]; 5512241170Sadrian 5513241170Sadrian ath_tx_tid_resume(sc, atid); 5514241170Sadrian } 5515243786Sadrian ATH_TX_UNLOCK(sc); 5516241170Sadrian} 5517241170Sadrian 5518241170Sadrianstatic int 5519238710Sadrianath_legacy_dma_txsetup(struct ath_softc *sc) 5520238710Sadrian{ 5521238710Sadrian 5522238710Sadrian /* nothing new needed */ 5523238710Sadrian return (0); 5524238710Sadrian} 5525238710Sadrian 5526238710Sadrianstatic int 5527238710Sadrianath_legacy_dma_txteardown(struct ath_softc *sc) 5528238710Sadrian{ 5529238710Sadrian 5530238710Sadrian /* nothing new needed */ 5531238710Sadrian return (0); 5532238710Sadrian} 5533238710Sadrian 5534238710Sadrianvoid 5535238710Sadrianath_xmit_setup_legacy(struct ath_softc *sc) 5536238710Sadrian{ 5537238729Sadrian /* 5538238729Sadrian * For now, just set the descriptor length to sizeof(ath_desc); 5539238729Sadrian * worry about extracting the real length out of the HAL later. 5540238729Sadrian */ 5541238729Sadrian sc->sc_tx_desclen = sizeof(struct ath_desc); 5542243162Sadrian sc->sc_tx_statuslen = sizeof(struct ath_desc); 5543238729Sadrian sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */ 5544238710Sadrian 5545238710Sadrian sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup; 5546238710Sadrian sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown; 5547238931Sadrian sc->sc_tx.xmit_attach_comp_func = ath_legacy_attach_comp_func; 5548238930Sadrian 5549238930Sadrian sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart; 5550238930Sadrian sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff; 5551239204Sadrian 5552239204Sadrian sc->sc_tx.xmit_drain = ath_legacy_tx_drain; 5553238710Sadrian} 5554