if_ath_tx.c revision 240180
1218065Sadrian/*- 2218065Sadrian * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 3218065Sadrian * All rights reserved. 4218065Sadrian * 5218065Sadrian * Redistribution and use in source and binary forms, with or without 6218065Sadrian * modification, are permitted provided that the following conditions 7218065Sadrian * are met: 8218065Sadrian * 1. Redistributions of source code must retain the above copyright 9218065Sadrian * notice, this list of conditions and the following disclaimer, 10218065Sadrian * without modification. 11218065Sadrian * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12218065Sadrian * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13218065Sadrian * redistribution must be conditioned upon including a substantially 14218065Sadrian * similar Disclaimer requirement for further binary redistribution. 15218065Sadrian * 16218065Sadrian * NO WARRANTY 17218065Sadrian * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18218065Sadrian * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19218065Sadrian * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 20218065Sadrian * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 21218065Sadrian * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 22218065Sadrian * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23218065Sadrian * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24218065Sadrian * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25218065Sadrian * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26218065Sadrian * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27218065Sadrian * THE POSSIBILITY OF SUCH DAMAGES. 28218065Sadrian */ 29218065Sadrian 30218065Sadrian#include <sys/cdefs.h> 31218065Sadrian__FBSDID("$FreeBSD: head/sys/dev/ath/if_ath_tx.c 240180 2012-09-07 00:24:27Z adrian $"); 32218065Sadrian 33218065Sadrian/* 34218065Sadrian * Driver for the Atheros Wireless LAN controller. 35218065Sadrian * 36218065Sadrian * This software is derived from work of Atsushi Onoe; his contribution 37218065Sadrian * is greatly appreciated. 38218065Sadrian */ 39218065Sadrian 40218065Sadrian#include "opt_inet.h" 41218065Sadrian#include "opt_ath.h" 42218065Sadrian#include "opt_wlan.h" 43218065Sadrian 44218065Sadrian#include <sys/param.h> 45218065Sadrian#include <sys/systm.h> 46218065Sadrian#include <sys/sysctl.h> 47218065Sadrian#include <sys/mbuf.h> 48218065Sadrian#include <sys/malloc.h> 49218065Sadrian#include <sys/lock.h> 50218065Sadrian#include <sys/mutex.h> 51218065Sadrian#include <sys/kernel.h> 52218065Sadrian#include <sys/socket.h> 53218065Sadrian#include <sys/sockio.h> 54218065Sadrian#include <sys/errno.h> 55218065Sadrian#include <sys/callout.h> 56218065Sadrian#include <sys/bus.h> 57218065Sadrian#include <sys/endian.h> 58218065Sadrian#include <sys/kthread.h> 59218065Sadrian#include <sys/taskqueue.h> 60218065Sadrian#include <sys/priv.h> 61218065Sadrian 62218065Sadrian#include <machine/bus.h> 63218065Sadrian 64218065Sadrian#include <net/if.h> 65218065Sadrian#include <net/if_dl.h> 66218065Sadrian#include <net/if_media.h> 67218065Sadrian#include <net/if_types.h> 68218065Sadrian#include <net/if_arp.h> 69218065Sadrian#include <net/ethernet.h> 70218065Sadrian#include <net/if_llc.h> 71218065Sadrian 72218065Sadrian#include <net80211/ieee80211_var.h> 73218065Sadrian#include <net80211/ieee80211_regdomain.h> 74218065Sadrian#ifdef IEEE80211_SUPPORT_SUPERG 75218065Sadrian#include <net80211/ieee80211_superg.h> 76218065Sadrian#endif 77218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 78218065Sadrian#include <net80211/ieee80211_tdma.h> 79218065Sadrian#endif 80227364Sadrian#include <net80211/ieee80211_ht.h> 81218065Sadrian 82218065Sadrian#include <net/bpf.h> 83218065Sadrian 84218065Sadrian#ifdef INET 85218065Sadrian#include <netinet/in.h> 86218065Sadrian#include <netinet/if_ether.h> 87218065Sadrian#endif 88218065Sadrian 89218065Sadrian#include <dev/ath/if_athvar.h> 90218065Sadrian#include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */ 91218065Sadrian#include <dev/ath/ath_hal/ah_diagcodes.h> 92218065Sadrian 93218065Sadrian#include <dev/ath/if_ath_debug.h> 94218065Sadrian 95218065Sadrian#ifdef ATH_TX99_DIAG 96218065Sadrian#include <dev/ath/ath_tx99/ath_tx99.h> 97218065Sadrian#endif 98218065Sadrian 99218065Sadrian#include <dev/ath/if_ath_misc.h> 100218065Sadrian#include <dev/ath/if_ath_tx.h> 101218240Sadrian#include <dev/ath/if_ath_tx_ht.h> 102218065Sadrian 103218154Sadrian/* 104227364Sadrian * How many retries to perform in software 105227364Sadrian */ 106227364Sadrian#define SWMAX_RETRIES 10 107227364Sadrian 108227364Sadrianstatic int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, 109227364Sadrian int tid); 110227364Sadrianstatic int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, 111227364Sadrian int tid); 112236872Sadrianstatic ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc, 113236872Sadrian struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0); 114227364Sadrianstatic int ath_tx_action_frame_override_queue(struct ath_softc *sc, 115227364Sadrian struct ieee80211_node *ni, struct mbuf *m0, int *tid); 116227364Sadrian 117227364Sadrian/* 118218154Sadrian * Whether to use the 11n rate scenario functions or not 119218154Sadrian */ 120218154Sadrianstatic inline int 121218154Sadrianath_tx_is_11n(struct ath_softc *sc) 122218154Sadrian{ 123239198Sadrian return ((sc->sc_ah->ah_magic == 0x20065416) || 124239198Sadrian (sc->sc_ah->ah_magic == 0x19741014)); 125218154Sadrian} 126218154Sadrian 127227364Sadrian/* 128227364Sadrian * Obtain the current TID from the given frame. 129227364Sadrian * 130227364Sadrian * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.) 131227364Sadrian * This has implications for which AC/priority the packet is placed 132227364Sadrian * in. 133227364Sadrian */ 134227364Sadrianstatic int 135227364Sadrianath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0) 136227364Sadrian{ 137227364Sadrian const struct ieee80211_frame *wh; 138227364Sadrian int pri = M_WME_GETAC(m0); 139227364Sadrian 140227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 141227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 142227364Sadrian return IEEE80211_NONQOS_TID; 143227364Sadrian else 144227364Sadrian return WME_AC_TO_TID(pri); 145227364Sadrian} 146227364Sadrian 147227364Sadrian/* 148227364Sadrian * Determine what the correct AC queue for the given frame 149227364Sadrian * should be. 150227364Sadrian * 151227364Sadrian * This code assumes that the TIDs map consistently to 152227364Sadrian * the underlying hardware (or software) ath_txq. 153227364Sadrian * Since the sender may try to set an AC which is 154227364Sadrian * arbitrary, non-QoS TIDs may end up being put on 155227364Sadrian * completely different ACs. There's no way to put a 156227364Sadrian * TID into multiple ath_txq's for scheduling, so 157227364Sadrian * for now we override the AC/TXQ selection and set 158227364Sadrian * non-QOS TID frames into the BE queue. 159227364Sadrian * 160227364Sadrian * This may be completely incorrect - specifically, 161227364Sadrian * some management frames may end up out of order 162227364Sadrian * compared to the QoS traffic they're controlling. 163227364Sadrian * I'll look into this later. 164227364Sadrian */ 165227364Sadrianstatic int 166227364Sadrianath_tx_getac(struct ath_softc *sc, const struct mbuf *m0) 167227364Sadrian{ 168227364Sadrian const struct ieee80211_frame *wh; 169227364Sadrian int pri = M_WME_GETAC(m0); 170227364Sadrian wh = mtod(m0, const struct ieee80211_frame *); 171227364Sadrian if (IEEE80211_QOS_HAS_SEQ(wh)) 172227364Sadrian return pri; 173227364Sadrian 174227364Sadrian return WME_AC_BE; 175227364Sadrian} 176227364Sadrian 177218065Sadrianvoid 178218065Sadrianath_txfrag_cleanup(struct ath_softc *sc, 179218065Sadrian ath_bufhead *frags, struct ieee80211_node *ni) 180218065Sadrian{ 181218065Sadrian struct ath_buf *bf, *next; 182218065Sadrian 183218065Sadrian ATH_TXBUF_LOCK_ASSERT(sc); 184218065Sadrian 185227344Sadrian TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) { 186218065Sadrian /* NB: bf assumed clean */ 187227344Sadrian TAILQ_REMOVE(frags, bf, bf_list); 188236993Sadrian ath_returnbuf_head(sc, bf); 189218065Sadrian ieee80211_node_decref(ni); 190218065Sadrian } 191218065Sadrian} 192218065Sadrian 193218065Sadrian/* 194218065Sadrian * Setup xmit of a fragmented frame. Allocate a buffer 195218065Sadrian * for each frag and bump the node reference count to 196218065Sadrian * reflect the held reference to be setup by ath_tx_start. 197218065Sadrian */ 198218065Sadrianint 199218065Sadrianath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags, 200218065Sadrian struct mbuf *m0, struct ieee80211_node *ni) 201218065Sadrian{ 202218065Sadrian struct mbuf *m; 203218065Sadrian struct ath_buf *bf; 204218065Sadrian 205218065Sadrian ATH_TXBUF_LOCK(sc); 206218065Sadrian for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) { 207237000Sadrian /* XXX non-management? */ 208237000Sadrian bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL); 209218065Sadrian if (bf == NULL) { /* out of buffers, cleanup */ 210234009Sadrian device_printf(sc->sc_dev, "%s: no buffer?\n", 211234009Sadrian __func__); 212218065Sadrian ath_txfrag_cleanup(sc, frags, ni); 213218065Sadrian break; 214218065Sadrian } 215218065Sadrian ieee80211_node_incref(ni); 216227344Sadrian TAILQ_INSERT_TAIL(frags, bf, bf_list); 217218065Sadrian } 218218065Sadrian ATH_TXBUF_UNLOCK(sc); 219218065Sadrian 220227344Sadrian return !TAILQ_EMPTY(frags); 221218065Sadrian} 222218065Sadrian 223218065Sadrian/* 224218065Sadrian * Reclaim mbuf resources. For fragmented frames we 225218065Sadrian * need to claim each frag chained with m_nextpkt. 226218065Sadrian */ 227218065Sadrianvoid 228218065Sadrianath_freetx(struct mbuf *m) 229218065Sadrian{ 230218065Sadrian struct mbuf *next; 231218065Sadrian 232218065Sadrian do { 233218065Sadrian next = m->m_nextpkt; 234218065Sadrian m->m_nextpkt = NULL; 235218065Sadrian m_freem(m); 236218065Sadrian } while ((m = next) != NULL); 237218065Sadrian} 238218065Sadrian 239218065Sadrianstatic int 240218065Sadrianath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0) 241218065Sadrian{ 242218065Sadrian struct mbuf *m; 243218065Sadrian int error; 244218065Sadrian 245218065Sadrian /* 246218065Sadrian * Load the DMA map so any coalescing is done. This 247218065Sadrian * also calculates the number of descriptors we need. 248218065Sadrian */ 249218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 250218065Sadrian bf->bf_segs, &bf->bf_nseg, 251218065Sadrian BUS_DMA_NOWAIT); 252218065Sadrian if (error == EFBIG) { 253218065Sadrian /* XXX packet requires too many descriptors */ 254218065Sadrian bf->bf_nseg = ATH_TXDESC+1; 255218065Sadrian } else if (error != 0) { 256218065Sadrian sc->sc_stats.ast_tx_busdma++; 257218065Sadrian ath_freetx(m0); 258218065Sadrian return error; 259218065Sadrian } 260218065Sadrian /* 261218065Sadrian * Discard null packets and check for packets that 262218065Sadrian * require too many TX descriptors. We try to convert 263218065Sadrian * the latter to a cluster. 264218065Sadrian */ 265218065Sadrian if (bf->bf_nseg > ATH_TXDESC) { /* too many desc's, linearize */ 266218065Sadrian sc->sc_stats.ast_tx_linear++; 267218065Sadrian m = m_collapse(m0, M_DONTWAIT, ATH_TXDESC); 268218065Sadrian if (m == NULL) { 269218065Sadrian ath_freetx(m0); 270218065Sadrian sc->sc_stats.ast_tx_nombuf++; 271218065Sadrian return ENOMEM; 272218065Sadrian } 273218065Sadrian m0 = m; 274218065Sadrian error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0, 275218065Sadrian bf->bf_segs, &bf->bf_nseg, 276218065Sadrian BUS_DMA_NOWAIT); 277218065Sadrian if (error != 0) { 278218065Sadrian sc->sc_stats.ast_tx_busdma++; 279218065Sadrian ath_freetx(m0); 280218065Sadrian return error; 281218065Sadrian } 282218065Sadrian KASSERT(bf->bf_nseg <= ATH_TXDESC, 283218065Sadrian ("too many segments after defrag; nseg %u", bf->bf_nseg)); 284218065Sadrian } else if (bf->bf_nseg == 0) { /* null packet, discard */ 285218065Sadrian sc->sc_stats.ast_tx_nodata++; 286218065Sadrian ath_freetx(m0); 287218065Sadrian return EIO; 288218065Sadrian } 289218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n", 290218065Sadrian __func__, m0, m0->m_pkthdr.len); 291218065Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 292218065Sadrian bf->bf_m = m0; 293218065Sadrian 294218065Sadrian return 0; 295218065Sadrian} 296218065Sadrian 297227360Sadrian/* 298227360Sadrian * Chain together segments+descriptors for a non-11n frame. 299227360Sadrian */ 300218065Sadrianstatic void 301227364Sadrianath_tx_chaindesclist(struct ath_softc *sc, struct ath_buf *bf) 302218065Sadrian{ 303218065Sadrian struct ath_hal *ah = sc->sc_ah; 304239409Sadrian char *ds, *ds0; 305239290Sadrian int i, bp, dsp; 306239051Sadrian HAL_DMA_ADDR bufAddrList[4]; 307239051Sadrian uint32_t segLenList[4]; 308239290Sadrian int numTxMaps = 1; 309239380Sadrian int isFirstDesc = 1; 310239465Sadrian int qnum; 311239051Sadrian 312238708Sadrian /* 313238708Sadrian * XXX There's txdma and txdma_mgmt; the descriptor 314238708Sadrian * sizes must match. 315238708Sadrian */ 316238708Sadrian struct ath_descdma *dd = &sc->sc_txdma; 317218065Sadrian 318218065Sadrian /* 319218065Sadrian * Fillin the remainder of the descriptor info. 320218065Sadrian */ 321239290Sadrian 322239290Sadrian /* 323239290Sadrian * For now the HAL doesn't implement halNumTxMaps for non-EDMA 324239290Sadrian * (ie it's 0.) So just work around it. 325239290Sadrian * 326239290Sadrian * XXX TODO: populate halNumTxMaps for each HAL chip and 327239290Sadrian * then undo this hack. 328239290Sadrian */ 329239290Sadrian if (sc->sc_ah->ah_magic == 0x19741014) 330239290Sadrian numTxMaps = 4; 331239290Sadrian 332239290Sadrian /* 333239290Sadrian * For EDMA and later chips ensure the TX map is fully populated 334239290Sadrian * before advancing to the next descriptor. 335239290Sadrian */ 336239409Sadrian ds0 = ds = (char *) bf->bf_desc; 337239290Sadrian bp = dsp = 0; 338239290Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 339239290Sadrian bzero(segLenList, sizeof(segLenList)); 340239290Sadrian for (i = 0; i < bf->bf_nseg; i++) { 341239290Sadrian bufAddrList[bp] = bf->bf_segs[i].ds_addr; 342239290Sadrian segLenList[bp] = bf->bf_segs[i].ds_len; 343239290Sadrian bp++; 344239051Sadrian 345239290Sadrian /* 346239290Sadrian * Go to the next segment if this isn't the last segment 347239290Sadrian * and there's space in the current TX map. 348239290Sadrian */ 349239290Sadrian if ((i != bf->bf_nseg - 1) && (bp < numTxMaps)) 350239290Sadrian continue; 351239051Sadrian 352239290Sadrian /* 353239290Sadrian * Last segment or we're out of buffer pointers. 354239290Sadrian */ 355239290Sadrian bp = 0; 356239290Sadrian 357218065Sadrian if (i == bf->bf_nseg - 1) 358239409Sadrian ath_hal_settxdesclink(ah, (struct ath_desc *) ds, 0); 359218065Sadrian else 360239409Sadrian ath_hal_settxdesclink(ah, (struct ath_desc *) ds, 361239290Sadrian bf->bf_daddr + dd->dd_descsize * (dsp + 1)); 362239051Sadrian 363239051Sadrian /* 364239051Sadrian * XXX this assumes that bfs_txq is the actual destination 365239051Sadrian * hardware queue at this point. It may not have been assigned, 366239051Sadrian * it may actually be pointing to the multicast software 367239051Sadrian * TXQ id. These must be fixed! 368239051Sadrian */ 369239465Sadrian qnum = bf->bf_state.bfs_txq->axq_qnum; 370239465Sadrian 371239409Sadrian ath_hal_filltxdesc(ah, (struct ath_desc *) ds 372239051Sadrian , bufAddrList 373239051Sadrian , segLenList 374239290Sadrian , bf->bf_descid /* XXX desc id */ 375239465Sadrian , qnum 376239380Sadrian , isFirstDesc /* first segment */ 377218065Sadrian , i == bf->bf_nseg - 1 /* last segment */ 378239409Sadrian , (struct ath_desc *) ds0 /* first descriptor */ 379218065Sadrian ); 380239380Sadrian isFirstDesc = 0; 381239438Sadrian#ifdef ATH_DEBUG 382239409Sadrian if (sc->sc_debug & ATH_DEBUG_XMIT) 383239409Sadrian ath_printtxbuf(sc, bf, qnum, 0, 0); 384239438Sadrian#endif 385239409Sadrian bf->bf_lastds = (struct ath_desc *) ds; 386239290Sadrian 387239290Sadrian /* 388239290Sadrian * Don't forget to skip to the next descriptor. 389239290Sadrian */ 390239409Sadrian ds += sc->sc_tx_desclen; 391239290Sadrian dsp++; 392239290Sadrian 393239290Sadrian /* 394239290Sadrian * .. and don't forget to blank these out! 395239290Sadrian */ 396239290Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 397239290Sadrian bzero(segLenList, sizeof(segLenList)); 398218065Sadrian } 399233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 400218154Sadrian} 401218154Sadrian 402227364Sadrian/* 403227364Sadrian * Fill in the descriptor list for a aggregate subframe. 404227364Sadrian * 405227364Sadrian * The subframe is returned with the ds_link field in the last subframe 406227364Sadrian * pointing to 0. 407227364Sadrian */ 408218154Sadrianstatic void 409227364Sadrianath_tx_chaindesclist_subframe(struct ath_softc *sc, struct ath_buf *bf) 410218154Sadrian{ 411218154Sadrian struct ath_hal *ah = sc->sc_ah; 412227364Sadrian struct ath_desc *ds, *ds0; 413227364Sadrian int i; 414239053Sadrian HAL_DMA_ADDR bufAddrList[4]; 415239053Sadrian uint32_t segLenList[4]; 416239053Sadrian 417238708Sadrian /* 418238708Sadrian * XXX There's txdma and txdma_mgmt; the descriptor 419238708Sadrian * sizes must match. 420238708Sadrian */ 421238708Sadrian struct ath_descdma *dd = &sc->sc_txdma; 422218154Sadrian 423227364Sadrian ds0 = ds = bf->bf_desc; 424218154Sadrian 425218065Sadrian /* 426227364Sadrian * There's no need to call ath_hal_setupfirsttxdesc here; 427227364Sadrian * That's only going to occur for the first frame in an aggregate. 428227364Sadrian */ 429227364Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 430239053Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 431239053Sadrian bzero(segLenList, sizeof(segLenList)); 432227364Sadrian if (i == bf->bf_nseg - 1) 433238609Sadrian ath_hal_settxdesclink(ah, ds, 0); 434227364Sadrian else 435238609Sadrian ath_hal_settxdesclink(ah, ds, 436238708Sadrian bf->bf_daddr + dd->dd_descsize * (i + 1)); 437227364Sadrian 438239053Sadrian bufAddrList[0] = bf->bf_segs[i].ds_addr; 439239053Sadrian segLenList[0] = bf->bf_segs[i].ds_len; 440239053Sadrian 441227364Sadrian /* 442227364Sadrian * This performs the setup for an aggregate frame. 443227364Sadrian * This includes enabling the aggregate flags if needed. 444227364Sadrian */ 445227364Sadrian ath_hal_chaintxdesc(ah, ds, 446239053Sadrian bufAddrList, 447239053Sadrian segLenList, 448227364Sadrian bf->bf_state.bfs_pktlen, 449227364Sadrian bf->bf_state.bfs_hdrlen, 450227364Sadrian HAL_PKT_TYPE_AMPDU, /* forces aggregate bits to be set */ 451227364Sadrian bf->bf_state.bfs_keyix, 452227364Sadrian 0, /* cipher, calculated from keyix */ 453227364Sadrian bf->bf_state.bfs_ndelim, 454227364Sadrian i == 0, /* first segment */ 455233895Sadrian i == bf->bf_nseg - 1, /* last segment */ 456233895Sadrian bf->bf_next == NULL /* last sub-frame in aggr */ 457227364Sadrian ); 458227364Sadrian 459227364Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 460227364Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 461227364Sadrian __func__, i, ds->ds_link, ds->ds_data, 462227364Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 463227364Sadrian bf->bf_lastds = ds; 464233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 465233990Sadrian BUS_DMASYNC_PREWRITE); 466227364Sadrian } 467227364Sadrian} 468227364Sadrian 469227364Sadrian/* 470238947Sadrian * Set the rate control fields in the given descriptor based on 471238947Sadrian * the bf_state fields and node state. 472238947Sadrian * 473238947Sadrian * The bfs fields should already be set with the relevant rate 474238947Sadrian * control information, including whether MRR is to be enabled. 475238947Sadrian * 476238947Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 477238947Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 478238947Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 479238947Sadrian * unconditionally for 11n chips. These require the 11n rate 480238947Sadrian * scenario to be set if MCS rates are enabled, so it's easier 481238947Sadrian * to just always call it. The caller can then only set rates 2, 3 482238947Sadrian * and 4 if multi-rate retry is needed. 483238947Sadrian */ 484238947Sadrianstatic void 485238947Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 486238947Sadrian struct ath_buf *bf) 487238947Sadrian{ 488238947Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 489238947Sadrian 490238947Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 491238947Sadrian if (! bf->bf_state.bfs_ismrr) 492238947Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 493238947Sadrian 494238947Sadrian /* 495238947Sadrian * Always call - that way a retried descriptor will 496238947Sadrian * have the MRR fields overwritten. 497238947Sadrian * 498238947Sadrian * XXX TODO: see if this is really needed - setting up 499238947Sadrian * the first descriptor should set the MRR fields to 0 500238947Sadrian * for us anyway. 501238947Sadrian */ 502238947Sadrian if (ath_tx_is_11n(sc)) { 503238947Sadrian ath_buf_set_rate(sc, ni, bf); 504238947Sadrian } else { 505238947Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 506238947Sadrian , rc[1].ratecode, rc[1].tries 507238947Sadrian , rc[2].ratecode, rc[2].tries 508238947Sadrian , rc[3].ratecode, rc[3].tries 509238947Sadrian ); 510238947Sadrian } 511238947Sadrian} 512238947Sadrian 513238947Sadrian/* 514227364Sadrian * Setup segments+descriptors for an 11n aggregate. 515227364Sadrian * bf_first is the first buffer in the aggregate. 516227364Sadrian * The descriptor list must already been linked together using 517227364Sadrian * bf->bf_next. 518227364Sadrian */ 519227364Sadrianstatic void 520227364Sadrianath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first) 521227364Sadrian{ 522227364Sadrian struct ath_buf *bf, *bf_prev = NULL; 523227364Sadrian 524227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n", 525227364Sadrian __func__, bf_first->bf_state.bfs_nframes, 526227364Sadrian bf_first->bf_state.bfs_al); 527227364Sadrian 528227364Sadrian /* 529227364Sadrian * Setup all descriptors of all subframes. 530227364Sadrian */ 531227364Sadrian bf = bf_first; 532227364Sadrian while (bf != NULL) { 533227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 534227364Sadrian "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n", 535227364Sadrian __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen, 536227364Sadrian SEQNO(bf->bf_state.bfs_seqno)); 537227364Sadrian 538227364Sadrian /* Sub-frame setup */ 539227364Sadrian ath_tx_chaindesclist_subframe(sc, bf); 540227364Sadrian 541227364Sadrian /* 542227364Sadrian * Link the last descriptor of the previous frame 543227364Sadrian * to the beginning descriptor of this frame. 544227364Sadrian */ 545227364Sadrian if (bf_prev != NULL) 546238609Sadrian ath_hal_settxdesclink(sc->sc_ah, bf_prev->bf_lastds, 547238609Sadrian bf->bf_daddr); 548227364Sadrian 549227364Sadrian /* Save a copy so we can link the next descriptor in */ 550227364Sadrian bf_prev = bf; 551227364Sadrian bf = bf->bf_next; 552227364Sadrian } 553227364Sadrian 554227364Sadrian /* 555227364Sadrian * Setup first descriptor of first frame. 556227364Sadrian * chaintxdesc() overwrites the descriptor entries; 557227364Sadrian * setupfirsttxdesc() merges in things. 558227364Sadrian * Otherwise various fields aren't set correctly (eg flags). 559227364Sadrian */ 560227364Sadrian ath_hal_setupfirsttxdesc(sc->sc_ah, 561227364Sadrian bf_first->bf_desc, 562227364Sadrian bf_first->bf_state.bfs_al, 563233966Sadrian bf_first->bf_state.bfs_txflags | HAL_TXDESC_INTREQ, 564227364Sadrian bf_first->bf_state.bfs_txpower, 565227364Sadrian bf_first->bf_state.bfs_txrate0, 566227364Sadrian bf_first->bf_state.bfs_try0, 567227364Sadrian bf_first->bf_state.bfs_txantenna, 568227364Sadrian bf_first->bf_state.bfs_ctsrate, 569227364Sadrian bf_first->bf_state.bfs_ctsduration); 570227364Sadrian 571227364Sadrian /* 572227364Sadrian * Set the first descriptor bf_lastds field to point to 573227364Sadrian * the last descriptor in the last subframe, that's where 574227364Sadrian * the status update will occur. 575227364Sadrian */ 576227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 577227364Sadrian 578227364Sadrian /* 579227364Sadrian * And bf_last in the first descriptor points to the end of 580227364Sadrian * the aggregate list. 581227364Sadrian */ 582227364Sadrian bf_first->bf_last = bf_prev; 583227364Sadrian 584238947Sadrian /* 585238947Sadrian * setup first desc with rate and aggr info 586238947Sadrian */ 587238947Sadrian ath_tx_set_ratectrl(sc, bf_first->bf_node, bf_first); 588238947Sadrian 589238949Sadrian /* 590238949Sadrian * Setup the last descriptor in the list. 591238993Sadrian * 592238993Sadrian * bf_first->bf_lastds already points to it; the rate 593238993Sadrian * control information needs to be squirreled away here 594238993Sadrian * as well ans clearing the moreaggr/paddelim fields. 595238949Sadrian */ 596238993Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_first->bf_lastds, 597238949Sadrian bf_first->bf_desc); 598238949Sadrian 599227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 600227364Sadrian} 601227364Sadrian 602239051Sadrian/* 603239051Sadrian * Hand-off a frame to the multicast TX queue. 604239051Sadrian * 605239051Sadrian * This is a software TXQ which will be appended to the CAB queue 606239051Sadrian * during the beacon setup code. 607239051Sadrian * 608239051Sadrian * XXX TODO: since the AR9300 EDMA TX queue support wants the QCU ID 609239051Sadrian * as part of the TX descriptor, bf_state.bfs_txq must be updated 610239051Sadrian * with the actual hardware txq, or all of this will fall apart. 611239051Sadrian * 612239051Sadrian * XXX It may not be a bad idea to just stuff the QCU ID into bf_state 613239051Sadrian * and retire bfs_txq; then make sure the CABQ QCU ID is populated 614239051Sadrian * correctly. 615239051Sadrian */ 616227364Sadrianstatic void 617227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 618227364Sadrian struct ath_buf *bf) 619227364Sadrian{ 620227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 621227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 622227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 623227364Sadrian if (txq->axq_link != NULL) { 624227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 625227364Sadrian struct ieee80211_frame *wh; 626227364Sadrian 627227364Sadrian /* mark previous frame */ 628227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 629227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 630227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 631227364Sadrian BUS_DMASYNC_PREWRITE); 632227364Sadrian 633227364Sadrian /* link descriptor */ 634227364Sadrian *txq->axq_link = bf->bf_daddr; 635227364Sadrian } 636227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 637238609Sadrian ath_hal_gettxdesclinkptr(sc->sc_ah, bf->bf_lastds, &txq->axq_link); 638227364Sadrian} 639227364Sadrian 640227364Sadrian/* 641227364Sadrian * Hand-off packet to a hardware queue. 642227364Sadrian */ 643227364Sadrianstatic void 644229949Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, 645229949Sadrian struct ath_buf *bf) 646227364Sadrian{ 647227364Sadrian struct ath_hal *ah = sc->sc_ah; 648227364Sadrian 649227364Sadrian /* 650218065Sadrian * Insert the frame on the outbound list and pass it on 651218065Sadrian * to the hardware. Multicast frames buffered for power 652218065Sadrian * save stations and transmit from the CAB queue are stored 653218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 654218065Sadrian * the SWBA handler since frames only go out on DTIM and 655218065Sadrian * to avoid possible races. 656218065Sadrian */ 657227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 658218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 659227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 660227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 661227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 662227364Sadrian 663227651Sadrian#if 0 664227651Sadrian /* 665227651Sadrian * This causes a LOR. Find out where the PCU lock is being 666227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 667227651Sadrian * be occuring. 668227651Sadrian */ 669227651Sadrian ATH_PCU_LOCK(sc); 670227651Sadrian if (sc->sc_inreset_cnt) { 671227651Sadrian ATH_PCU_UNLOCK(sc); 672227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 673227651Sadrian "%s: called with sc_in_reset != 0\n", 674227651Sadrian __func__); 675227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 676227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 677227651Sadrian __func__, txq->axq_qnum, 678227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 679227651Sadrian txq->axq_depth); 680227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 681227651Sadrian if (bf->bf_state.bfs_aggr) 682227651Sadrian txq->axq_aggr_depth++; 683227651Sadrian /* 684227651Sadrian * There's no need to update axq_link; the hardware 685227651Sadrian * is in reset and once the reset is complete, any 686227651Sadrian * non-empty queues will simply have DMA restarted. 687227651Sadrian */ 688227651Sadrian return; 689227651Sadrian } 690227651Sadrian ATH_PCU_UNLOCK(sc); 691227651Sadrian#endif 692227651Sadrian 693227364Sadrian /* For now, so not to generate whitespace diffs */ 694227364Sadrian if (1) { 695218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 696218065Sadrian int qbusy; 697218065Sadrian 698218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 699218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 700218065Sadrian if (txq->axq_link == NULL) { 701218065Sadrian /* 702218065Sadrian * Be careful writing the address to TXDP. If 703218065Sadrian * the tx q is enabled then this write will be 704218065Sadrian * ignored. Normally this is not an issue but 705218065Sadrian * when tdma is in use and the q is beacon gated 706218065Sadrian * this race can occur. If the q is busy then 707218065Sadrian * defer the work to later--either when another 708218065Sadrian * packet comes along or when we prepare a beacon 709218065Sadrian * frame at SWBA. 710218065Sadrian */ 711218065Sadrian if (!qbusy) { 712229949Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 713229949Sadrian bf->bf_daddr); 714218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 715218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 716218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 717218065Sadrian __func__, txq->axq_qnum, 718218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 719218065Sadrian txq->axq_depth); 720218065Sadrian } else { 721218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 722218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 723218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 724218065Sadrian txq->axq_qnum); 725218065Sadrian } 726218065Sadrian } else { 727218065Sadrian *txq->axq_link = bf->bf_daddr; 728218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 729218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 730218065Sadrian txq->axq_qnum, txq->axq_link, 731229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 732229949Sadrian txq->axq_depth); 733218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 734218065Sadrian /* 735218065Sadrian * The q was busy when we previously tried 736218065Sadrian * to write the address of the first buffer 737218065Sadrian * in the chain. Since it's not busy now 738218065Sadrian * handle this chore. We are certain the 739218065Sadrian * buffer at the front is the right one since 740218065Sadrian * axq_link is NULL only when the buffer list 741218065Sadrian * is/was empty. 742218065Sadrian */ 743218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 744227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 745218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 746218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 747218065Sadrian "%s: Q%u restarted\n", __func__, 748218065Sadrian txq->axq_qnum); 749218065Sadrian } 750218065Sadrian } 751218065Sadrian#else 752218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 753218065Sadrian if (txq->axq_link == NULL) { 754218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 755218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 756218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 757218065Sadrian __func__, txq->axq_qnum, 758218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 759218065Sadrian txq->axq_depth); 760218065Sadrian } else { 761218065Sadrian *txq->axq_link = bf->bf_daddr; 762218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 763218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 764218065Sadrian txq->axq_qnum, txq->axq_link, 765229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 766229949Sadrian txq->axq_depth); 767218065Sadrian } 768218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 769227360Sadrian if (bf->bf_state.bfs_aggr) 770227360Sadrian txq->axq_aggr_depth++; 771238609Sadrian ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link); 772218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 773227364Sadrian } 774227364Sadrian} 775218065Sadrian 776227364Sadrian/* 777227364Sadrian * Restart TX DMA for the given TXQ. 778227364Sadrian * 779227364Sadrian * This must be called whether the queue is empty or not. 780227364Sadrian */ 781238930Sadrianstatic void 782238930Sadrianath_legacy_tx_dma_restart(struct ath_softc *sc, struct ath_txq *txq) 783227364Sadrian{ 784227364Sadrian struct ath_hal *ah = sc->sc_ah; 785232707Sadrian struct ath_buf *bf, *bf_last; 786218065Sadrian 787227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 788227364Sadrian 789227364Sadrian /* This is always going to be cleared, empty or not */ 790227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 791227364Sadrian 792232707Sadrian /* XXX make this ATH_TXQ_FIRST */ 793227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 794232707Sadrian bf_last = ATH_TXQ_LAST(txq, axq_q_s); 795232707Sadrian 796227364Sadrian if (bf == NULL) 797227364Sadrian return; 798227364Sadrian 799227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 800239120Sadrian ath_hal_gettxdesclinkptr(ah, bf_last->bf_lastds, &txq->axq_link); 801227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 802218065Sadrian} 803218065Sadrian 804227364Sadrian/* 805227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 806227364Sadrian * 807227364Sadrian * The relevant hardware txq should be locked. 808227364Sadrian */ 809227364Sadrianstatic void 810238930Sadrianath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq, 811238930Sadrian struct ath_buf *bf) 812227364Sadrian{ 813227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 814227364Sadrian 815227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 816227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 817227364Sadrian else 818227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 819227364Sadrian} 820227364Sadrian 821218154Sadrianstatic int 822218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 823229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 824229949Sadrian int *keyix) 825218154Sadrian{ 826233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 827233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 828233330Sadrian __func__, 829233330Sadrian *hdrlen, 830233330Sadrian *pktlen, 831233330Sadrian isfrag, 832233330Sadrian iswep, 833233330Sadrian m0); 834233330Sadrian 835218154Sadrian if (iswep) { 836218154Sadrian const struct ieee80211_cipher *cip; 837218154Sadrian struct ieee80211_key *k; 838218154Sadrian 839218154Sadrian /* 840218154Sadrian * Construct the 802.11 header+trailer for an encrypted 841218154Sadrian * frame. The only reason this can fail is because of an 842218154Sadrian * unknown or unsupported cipher/key type. 843218154Sadrian */ 844218154Sadrian k = ieee80211_crypto_encap(ni, m0); 845218154Sadrian if (k == NULL) { 846218154Sadrian /* 847218154Sadrian * This can happen when the key is yanked after the 848218154Sadrian * frame was queued. Just discard the frame; the 849218154Sadrian * 802.11 layer counts failures and provides 850218154Sadrian * debugging/diagnostics. 851218154Sadrian */ 852229949Sadrian return (0); 853218154Sadrian } 854218154Sadrian /* 855218154Sadrian * Adjust the packet + header lengths for the crypto 856218154Sadrian * additions and calculate the h/w key index. When 857218154Sadrian * a s/w mic is done the frame will have had any mic 858218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 859218154Sadrian * account for it. Otherwise we need to add it to the 860218154Sadrian * packet length. 861218154Sadrian */ 862218154Sadrian cip = k->wk_cipher; 863218154Sadrian (*hdrlen) += cip->ic_header; 864218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 865218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 866218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 867218154Sadrian (*pktlen) += cip->ic_miclen; 868218154Sadrian (*keyix) = k->wk_keyix; 869218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 870218154Sadrian /* 871218154Sadrian * Use station key cache slot, if assigned. 872218154Sadrian */ 873218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 874218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 875218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 876218154Sadrian } else 877218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 878218154Sadrian 879229949Sadrian return (1); 880218154Sadrian} 881218154Sadrian 882233989Sadrian/* 883233989Sadrian * Calculate whether interoperability protection is required for 884233989Sadrian * this frame. 885233989Sadrian * 886233989Sadrian * This requires the rate control information be filled in, 887233989Sadrian * as the protection requirement depends upon the current 888233989Sadrian * operating mode / PHY. 889233989Sadrian */ 890233989Sadrianstatic void 891233989Sadrianath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf) 892233989Sadrian{ 893233989Sadrian struct ieee80211_frame *wh; 894233989Sadrian uint8_t rix; 895233989Sadrian uint16_t flags; 896233989Sadrian int shortPreamble; 897233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 898233989Sadrian struct ifnet *ifp = sc->sc_ifp; 899233989Sadrian struct ieee80211com *ic = ifp->if_l2com; 900233989Sadrian 901233989Sadrian flags = bf->bf_state.bfs_txflags; 902233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 903233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 904233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 905233989Sadrian 906233989Sadrian /* 907233989Sadrian * If 802.11g protection is enabled, determine whether 908233989Sadrian * to use RTS/CTS or just CTS. Note that this is only 909233989Sadrian * done for OFDM unicast frames. 910233989Sadrian */ 911233989Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 912233989Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 913233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 914233989Sadrian bf->bf_state.bfs_doprot = 1; 915233989Sadrian /* XXX fragments must use CCK rates w/ protection */ 916233989Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 917233989Sadrian flags |= HAL_TXDESC_RTSENA; 918233989Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 919233989Sadrian flags |= HAL_TXDESC_CTSENA; 920233989Sadrian } 921233989Sadrian /* 922233989Sadrian * For frags it would be desirable to use the 923233989Sadrian * highest CCK rate for RTS/CTS. But stations 924233989Sadrian * farther away may detect it at a lower CCK rate 925233989Sadrian * so use the configured protection rate instead 926233989Sadrian * (for now). 927233989Sadrian */ 928233989Sadrian sc->sc_stats.ast_tx_protect++; 929233989Sadrian } 930233989Sadrian 931233989Sadrian /* 932233989Sadrian * If 11n protection is enabled and it's a HT frame, 933233989Sadrian * enable RTS. 934233989Sadrian * 935233989Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 936233989Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 937233989Sadrian * XXX indicates it's not a HT pure environment? 938233989Sadrian */ 939233989Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 940233989Sadrian rt->info[rix].phy == IEEE80211_T_HT && 941233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 942233989Sadrian flags |= HAL_TXDESC_RTSENA; 943233989Sadrian sc->sc_stats.ast_tx_htprotect++; 944233989Sadrian } 945233989Sadrian bf->bf_state.bfs_txflags = flags; 946233989Sadrian} 947233989Sadrian 948233989Sadrian/* 949233989Sadrian * Update the frame duration given the currently selected rate. 950233989Sadrian * 951233989Sadrian * This also updates the frame duration value, so it will require 952233989Sadrian * a DMA flush. 953233989Sadrian */ 954233989Sadrianstatic void 955233989Sadrianath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf) 956233989Sadrian{ 957233989Sadrian struct ieee80211_frame *wh; 958233989Sadrian uint8_t rix; 959233989Sadrian uint16_t flags; 960233989Sadrian int shortPreamble; 961233989Sadrian struct ath_hal *ah = sc->sc_ah; 962233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 963233989Sadrian int isfrag = bf->bf_m->m_flags & M_FRAG; 964233989Sadrian 965233989Sadrian flags = bf->bf_state.bfs_txflags; 966233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 967233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 968233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 969233989Sadrian 970233989Sadrian /* 971233989Sadrian * Calculate duration. This logically belongs in the 802.11 972233989Sadrian * layer but it lacks sufficient information to calculate it. 973233989Sadrian */ 974233989Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 975233989Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 976233989Sadrian u_int16_t dur; 977233989Sadrian if (shortPreamble) 978233989Sadrian dur = rt->info[rix].spAckDuration; 979233989Sadrian else 980233989Sadrian dur = rt->info[rix].lpAckDuration; 981233989Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 982233989Sadrian dur += dur; /* additional SIFS+ACK */ 983233989Sadrian KASSERT(bf->bf_m->m_nextpkt != NULL, ("no fragment")); 984233989Sadrian /* 985233989Sadrian * Include the size of next fragment so NAV is 986233989Sadrian * updated properly. The last fragment uses only 987233989Sadrian * the ACK duration 988233989Sadrian */ 989233989Sadrian dur += ath_hal_computetxtime(ah, rt, 990233989Sadrian bf->bf_m->m_nextpkt->m_pkthdr.len, 991233989Sadrian rix, shortPreamble); 992233989Sadrian } 993233989Sadrian if (isfrag) { 994233989Sadrian /* 995233989Sadrian * Force hardware to use computed duration for next 996233989Sadrian * fragment by disabling multi-rate retry which updates 997233989Sadrian * duration based on the multi-rate duration table. 998233989Sadrian */ 999233989Sadrian bf->bf_state.bfs_ismrr = 0; 1000233989Sadrian bf->bf_state.bfs_try0 = ATH_TXMGTTRY; 1001233989Sadrian /* XXX update bfs_rc[0].try? */ 1002233989Sadrian } 1003233989Sadrian 1004233989Sadrian /* Update the duration field itself */ 1005233989Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 1006233989Sadrian } 1007233989Sadrian} 1008233989Sadrian 1009218932Sadrianstatic uint8_t 1010218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 1011227364Sadrian int cix, int shortPreamble) 1012218157Sadrian{ 1013218932Sadrian uint8_t ctsrate; 1014218932Sadrian 1015218157Sadrian /* 1016218157Sadrian * CTS transmit rate is derived from the transmit rate 1017218157Sadrian * by looking in the h/w rate table. We must also factor 1018218157Sadrian * in whether or not a short preamble is to be used. 1019218157Sadrian */ 1020218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 1021218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 1022218932Sadrian ctsrate = rt->info[cix].rateCode; 1023218932Sadrian 1024218932Sadrian /* XXX this should only matter for legacy rates */ 1025218932Sadrian if (shortPreamble) 1026218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 1027218932Sadrian 1028229949Sadrian return (ctsrate); 1029218932Sadrian} 1030218932Sadrian 1031218932Sadrian/* 1032218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 1033218932Sadrian */ 1034218932Sadrianstatic int 1035218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 1036218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 1037218932Sadrian int flags) 1038218932Sadrian{ 1039218932Sadrian int ctsduration = 0; 1040218932Sadrian 1041218932Sadrian /* This mustn't be called for HT modes */ 1042218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 1043218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 1044218932Sadrian __func__, rt->info[cix].rateCode); 1045229949Sadrian return (-1); 1046218932Sadrian } 1047218932Sadrian 1048218157Sadrian /* 1049218157Sadrian * Compute the transmit duration based on the frame 1050218157Sadrian * size and the size of an ACK frame. We call into the 1051218157Sadrian * HAL to do the computation since it depends on the 1052218157Sadrian * characteristics of the actual PHY being used. 1053218157Sadrian * 1054218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 1055218157Sadrian * use the precalculated ACK durations. 1056218157Sadrian */ 1057218157Sadrian if (shortPreamble) { 1058218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1059218932Sadrian ctsduration += rt->info[cix].spAckDuration; 1060218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1061218157Sadrian rt, pktlen, rix, AH_TRUE); 1062218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1063218932Sadrian ctsduration += rt->info[rix].spAckDuration; 1064218157Sadrian } else { 1065218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1066218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 1067218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1068218157Sadrian rt, pktlen, rix, AH_FALSE); 1069218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1070218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 1071218157Sadrian } 1072218932Sadrian 1073229949Sadrian return (ctsduration); 1074218157Sadrian} 1075218157Sadrian 1076227364Sadrian/* 1077227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 1078227364Sadrian * values. 1079227364Sadrian * 1080227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 1081227364Sadrian * and cts duration must be re-calculated. 1082227364Sadrian * 1083227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 1084227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 1085227364Sadrian * 1086227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 1087227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 1088227364Sadrian */ 1089227364Sadrianstatic void 1090227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 1091218065Sadrian{ 1092227364Sadrian uint16_t ctsduration = 0; 1093227364Sadrian uint8_t ctsrate = 0; 1094227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 1095227364Sadrian uint8_t cix = 0; 1096227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 1097227364Sadrian 1098227364Sadrian /* 1099227364Sadrian * No RTS/CTS enabled? Don't bother. 1100227364Sadrian */ 1101233966Sadrian if ((bf->bf_state.bfs_txflags & 1102227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 1103227364Sadrian /* XXX is this really needed? */ 1104227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1105227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1106227364Sadrian return; 1107227364Sadrian } 1108227364Sadrian 1109227364Sadrian /* 1110227364Sadrian * If protection is enabled, use the protection rix control 1111227364Sadrian * rate. Otherwise use the rate0 control rate. 1112227364Sadrian */ 1113227364Sadrian if (bf->bf_state.bfs_doprot) 1114227364Sadrian rix = sc->sc_protrix; 1115227364Sadrian else 1116227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 1117227364Sadrian 1118227364Sadrian /* 1119227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 1120227364Sadrian * use it. 1121227364Sadrian */ 1122227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 1123227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 1124227364Sadrian else 1125227364Sadrian /* Control rate from above */ 1126227364Sadrian cix = rt->info[rix].controlRate; 1127227364Sadrian 1128227364Sadrian /* Calculate the rtscts rate for the given cix */ 1129227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 1130227364Sadrian bf->bf_state.bfs_shpream); 1131227364Sadrian 1132227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 1133227364Sadrian if (! ath_tx_is_11n(sc)) 1134227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 1135227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 1136233966Sadrian rt, bf->bf_state.bfs_txflags); 1137227364Sadrian 1138227364Sadrian /* Squirrel away in ath_buf */ 1139227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 1140227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 1141227364Sadrian 1142227364Sadrian /* 1143227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 1144227364Sadrian */ 1145238961Sadrian if (!sc->sc_mrrprot) { 1146238961Sadrian bf->bf_state.bfs_ismrr = 0; 1147238961Sadrian bf->bf_state.bfs_try0 = 1148238961Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 1149238961Sadrian } 1150227364Sadrian} 1151227364Sadrian 1152227364Sadrian/* 1153227364Sadrian * Setup the descriptor chain for a normal or fast-frame 1154227364Sadrian * frame. 1155239051Sadrian * 1156239051Sadrian * XXX TODO: extend to include the destination hardware QCU ID. 1157239051Sadrian * Make sure that is correct. Make sure that when being added 1158239051Sadrian * to the mcastq, the CABQ QCUID is set or things will get a bit 1159239051Sadrian * odd. 1160227364Sadrian */ 1161227364Sadrianstatic void 1162227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 1163227364Sadrian{ 1164227364Sadrian struct ath_desc *ds = bf->bf_desc; 1165227364Sadrian struct ath_hal *ah = sc->sc_ah; 1166227364Sadrian 1167227364Sadrian ath_hal_setuptxdesc(ah, ds 1168227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 1169227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 1170227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 1171227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 1172227364Sadrian , bf->bf_state.bfs_txrate0 1173227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 1174227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 1175227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 1176233966Sadrian , bf->bf_state.bfs_txflags /* flags */ 1177227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 1178227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 1179227364Sadrian ); 1180227364Sadrian 1181227364Sadrian /* 1182227364Sadrian * This will be overriden when the descriptor chain is written. 1183227364Sadrian */ 1184227364Sadrian bf->bf_lastds = ds; 1185227364Sadrian bf->bf_last = bf; 1186227364Sadrian 1187238947Sadrian /* Set rate control and descriptor chain for this frame */ 1188238947Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1189238947Sadrian ath_tx_chaindesclist(sc, bf); 1190227364Sadrian} 1191227364Sadrian 1192227364Sadrian/* 1193227364Sadrian * Do a rate lookup. 1194227364Sadrian * 1195227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 1196227364Sadrian * Non-data frames and raw frames don't require it. 1197227364Sadrian * 1198227364Sadrian * This populates the primary and MRR entries; MRR values are 1199227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 1200227364Sadrian * pre-11n chipsets. 1201227364Sadrian * 1202227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 1203227364Sadrian * as they may depend upon the rate chosen. 1204227364Sadrian */ 1205227364Sadrianstatic void 1206227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 1207227364Sadrian{ 1208227364Sadrian uint8_t rate, rix; 1209227364Sadrian int try0; 1210227364Sadrian 1211227364Sadrian if (! bf->bf_state.bfs_doratelookup) 1212227364Sadrian return; 1213227364Sadrian 1214227364Sadrian /* Get rid of any previous state */ 1215227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1216227364Sadrian 1217227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 1218227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 1219227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 1220227364Sadrian 1221227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 1222227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1223227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 1224227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1225227364Sadrian 1226227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 1227227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 1228227364Sadrian bf->bf_state.bfs_rc); 1229227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 1230227364Sadrian 1231227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 1232227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 1233227364Sadrian bf->bf_state.bfs_try0 = try0; 1234227364Sadrian bf->bf_state.bfs_txrate0 = rate; 1235227364Sadrian} 1236227364Sadrian 1237227364Sadrian/* 1238227364Sadrian * Transmit the given frame to the hardware. 1239227364Sadrian * 1240227364Sadrian * The frame must already be setup; rate control must already have 1241227364Sadrian * been done. 1242227364Sadrian * 1243227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 1244227364Sadrian * it for this long when not doing software aggregation), later on 1245227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 1246227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 1247227364Sadrian */ 1248227364Sadrianstatic void 1249227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 1250227364Sadrian struct ath_buf *bf) 1251227364Sadrian{ 1252227364Sadrian 1253227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1254227364Sadrian 1255227364Sadrian /* Setup the descriptor before handoff */ 1256227364Sadrian ath_tx_do_ratelookup(sc, bf); 1257233989Sadrian ath_tx_calc_duration(sc, bf); 1258233989Sadrian ath_tx_calc_protection(sc, bf); 1259233989Sadrian ath_tx_set_rtscts(sc, bf); 1260227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1261227364Sadrian ath_tx_setds(sc, bf); 1262227364Sadrian 1263227364Sadrian /* Hand off to hardware */ 1264227364Sadrian ath_tx_handoff(sc, txq, bf); 1265227364Sadrian} 1266227364Sadrian 1267227364Sadrian 1268227364Sadrian 1269227364Sadrianstatic int 1270227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1271234009Sadrian struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq) 1272227364Sadrian{ 1273218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1274218065Sadrian struct ath_hal *ah = sc->sc_ah; 1275218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1276218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1277218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1278218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1279227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1280227364Sadrian u_int8_t rix = 0, txrate = 0; 1281218065Sadrian struct ath_desc *ds; 1282218065Sadrian struct ieee80211_frame *wh; 1283227364Sadrian u_int subtype, flags; 1284218065Sadrian HAL_PKT_TYPE atype; 1285218065Sadrian const HAL_RATE_TABLE *rt; 1286218065Sadrian HAL_BOOL shortPreamble; 1287218065Sadrian struct ath_node *an; 1288218065Sadrian u_int pri; 1289218065Sadrian 1290236880Sadrian /* 1291236880Sadrian * To ensure that both sequence numbers and the CCMP PN handling 1292236880Sadrian * is "correct", make sure that the relevant TID queue is locked. 1293236880Sadrian * Otherwise the CCMP PN and seqno may appear out of order, causing 1294236880Sadrian * re-ordered frames to have out of order CCMP PN's, resulting 1295236880Sadrian * in many, many frame drops. 1296236880Sadrian */ 1297236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1298236880Sadrian 1299218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1300218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1301218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1302218065Sadrian isfrag = m0->m_flags & M_FRAG; 1303218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1304218065Sadrian /* 1305218065Sadrian * Packet length must not include any 1306218065Sadrian * pad bytes; deduct them here. 1307218065Sadrian */ 1308218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1309218065Sadrian 1310218154Sadrian /* Handle encryption twiddling if needed */ 1311227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1312227364Sadrian &pktlen, &keyix)) { 1313218154Sadrian ath_freetx(m0); 1314218154Sadrian return EIO; 1315218154Sadrian } 1316218065Sadrian 1317218154Sadrian /* packet header may have moved, reset our local pointer */ 1318218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1319218065Sadrian 1320218065Sadrian pktlen += IEEE80211_CRC_LEN; 1321218065Sadrian 1322218065Sadrian /* 1323218065Sadrian * Load the DMA map so any coalescing is done. This 1324218065Sadrian * also calculates the number of descriptors we need. 1325218065Sadrian */ 1326218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1327218065Sadrian if (error != 0) 1328218065Sadrian return error; 1329218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1330218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1331218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1332218065Sadrian 1333218065Sadrian /* setup descriptors */ 1334218065Sadrian ds = bf->bf_desc; 1335218065Sadrian rt = sc->sc_currates; 1336218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1337218065Sadrian 1338218065Sadrian /* 1339218065Sadrian * NB: the 802.11 layer marks whether or not we should 1340218065Sadrian * use short preamble based on the current mode and 1341218065Sadrian * negotiated parameters. 1342218065Sadrian */ 1343218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1344218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1345218065Sadrian shortPreamble = AH_TRUE; 1346218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1347218065Sadrian } else { 1348218065Sadrian shortPreamble = AH_FALSE; 1349218065Sadrian } 1350218065Sadrian 1351218065Sadrian an = ATH_NODE(ni); 1352218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1353218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1354218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1355218065Sadrian /* XXX use txparams instead of fixed values */ 1356218065Sadrian /* 1357218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1358218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1359218065Sadrian */ 1360218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1361218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1362218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1363218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1364218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1365218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1366218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1367218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1368218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1369218065Sadrian else 1370218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1371218065Sadrian rix = an->an_mgmtrix; 1372218065Sadrian txrate = rt->info[rix].rateCode; 1373218065Sadrian if (shortPreamble) 1374218065Sadrian txrate |= rt->info[rix].shortPreamble; 1375218065Sadrian try0 = ATH_TXMGTTRY; 1376218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1377218065Sadrian break; 1378218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1379218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1380218065Sadrian rix = an->an_mgmtrix; 1381218065Sadrian txrate = rt->info[rix].rateCode; 1382218065Sadrian if (shortPreamble) 1383218065Sadrian txrate |= rt->info[rix].shortPreamble; 1384218065Sadrian try0 = ATH_TXMGTTRY; 1385218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1386218065Sadrian break; 1387218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1388218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1389218065Sadrian /* 1390218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1391218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1392218065Sadrian * the rate control module for the rate to use. 1393218065Sadrian */ 1394218065Sadrian if (ismcast) { 1395218065Sadrian rix = an->an_mcastrix; 1396218065Sadrian txrate = rt->info[rix].rateCode; 1397218065Sadrian if (shortPreamble) 1398218065Sadrian txrate |= rt->info[rix].shortPreamble; 1399218065Sadrian try0 = 1; 1400218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1401218065Sadrian /* XXX? maybe always use long preamble? */ 1402218065Sadrian rix = an->an_mgmtrix; 1403218065Sadrian txrate = rt->info[rix].rateCode; 1404218065Sadrian if (shortPreamble) 1405218065Sadrian txrate |= rt->info[rix].shortPreamble; 1406218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1407218065Sadrian } else { 1408227364Sadrian /* 1409227364Sadrian * Do rate lookup on each TX, rather than using 1410227364Sadrian * the hard-coded TX information decided here. 1411227364Sadrian */ 1412227364Sadrian ismrr = 1; 1413227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1414218065Sadrian } 1415218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1416218065Sadrian flags |= HAL_TXDESC_NOACK; 1417218065Sadrian break; 1418218065Sadrian default: 1419218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1420218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1421218065Sadrian /* XXX statistic */ 1422218065Sadrian ath_freetx(m0); 1423218065Sadrian return EIO; 1424218065Sadrian } 1425218065Sadrian 1426237041Sadrian /* 1427237041Sadrian * There are two known scenarios where the frame AC doesn't match 1428237041Sadrian * what the destination TXQ is. 1429237041Sadrian * 1430237041Sadrian * + non-QoS frames (eg management?) that the net80211 stack has 1431237041Sadrian * assigned a higher AC to, but since it's a non-QoS TID, it's 1432237041Sadrian * being thrown into TID 16. TID 16 gets the AC_BE queue. 1433237041Sadrian * It's quite possible that management frames should just be 1434237041Sadrian * direct dispatched to hardware rather than go via the software 1435237041Sadrian * queue; that should be investigated in the future. There are 1436237041Sadrian * some specific scenarios where this doesn't make sense, mostly 1437237041Sadrian * surrounding ADDBA request/response - hence why that is special 1438237041Sadrian * cased. 1439237041Sadrian * 1440237041Sadrian * + Multicast frames going into the VAP mcast queue. That shows up 1441237041Sadrian * as "TXQ 11". 1442237041Sadrian * 1443237041Sadrian * This driver should eventually support separate TID and TXQ locking, 1444237041Sadrian * allowing for arbitrary AC frames to appear on arbitrary software 1445237041Sadrian * queues, being queued to the "correct" hardware queue when needed. 1446237041Sadrian */ 1447237041Sadrian#if 0 1448235750Sadrian if (txq != sc->sc_ac2q[pri]) { 1449235750Sadrian device_printf(sc->sc_dev, 1450235750Sadrian "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n", 1451235750Sadrian __func__, 1452235750Sadrian txq, 1453235750Sadrian txq->axq_qnum, 1454235750Sadrian pri, 1455235750Sadrian sc->sc_ac2q[pri], 1456235750Sadrian sc->sc_ac2q[pri]->axq_qnum); 1457235750Sadrian } 1458237041Sadrian#endif 1459235750Sadrian 1460218065Sadrian /* 1461218065Sadrian * Calculate miscellaneous flags. 1462218065Sadrian */ 1463218065Sadrian if (ismcast) { 1464218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1465218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1466218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1467218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1468218065Sadrian sc->sc_stats.ast_tx_rts++; 1469218065Sadrian } 1470218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1471218065Sadrian sc->sc_stats.ast_tx_noack++; 1472218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1473218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1474218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1475218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1476218065Sadrian sc->sc_stats.ast_tdma_ack++; 1477218065Sadrian ath_freetx(m0); 1478218065Sadrian return EIO; 1479218065Sadrian } 1480218065Sadrian#endif 1481218065Sadrian 1482218065Sadrian /* 1483227364Sadrian * Determine if a tx interrupt should be generated for 1484227364Sadrian * this descriptor. We take a tx interrupt to reap 1485227364Sadrian * descriptors when the h/w hits an EOL condition or 1486227364Sadrian * when the descriptor is specifically marked to generate 1487227364Sadrian * an interrupt. We periodically mark descriptors in this 1488227364Sadrian * way to insure timely replenishing of the supply needed 1489227364Sadrian * for sending frames. Defering interrupts reduces system 1490227364Sadrian * load and potentially allows more concurrent work to be 1491227364Sadrian * done but if done to aggressively can cause senders to 1492227364Sadrian * backup. 1493227364Sadrian * 1494227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1495227364Sadrian * dynamically through sysctl. 1496218065Sadrian */ 1497227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1498227364Sadrian txq->axq_intrcnt = 0; 1499227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1500227364Sadrian flags |= HAL_TXDESC_INTREQ; 1501227364Sadrian txq->axq_intrcnt = 0; 1502227364Sadrian } 1503218932Sadrian 1504227364Sadrian /* This point forward is actual TX bits */ 1505218065Sadrian 1506218065Sadrian /* 1507218065Sadrian * At this point we are committed to sending the frame 1508218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1509218065Sadrian * case this frame is part of frag chain. 1510218065Sadrian */ 1511218065Sadrian m0->m_nextpkt = NULL; 1512218065Sadrian 1513218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1514218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1515218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1516218065Sadrian 1517218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1518218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1519218065Sadrian 1520218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1521218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1522218065Sadrian if (iswep) 1523218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1524218065Sadrian if (isfrag) 1525218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1526218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1527218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1528218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1529218065Sadrian 1530218065Sadrian ieee80211_radiotap_tx(vap, m0); 1531218065Sadrian } 1532218065Sadrian 1533227364Sadrian /* Blank the legacy rate array */ 1534227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1535227364Sadrian 1536218065Sadrian /* 1537227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1538227364Sadrian * the rate scenario. 1539227364Sadrian */ 1540227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1541227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1542227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1543227364Sadrian 1544227364Sadrian /* Store the decided rate index values away */ 1545227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1546227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1547227364Sadrian bf->bf_state.bfs_atype = atype; 1548227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1549227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1550227364Sadrian bf->bf_state.bfs_try0 = try0; 1551227364Sadrian bf->bf_state.bfs_keyix = keyix; 1552227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1553233966Sadrian bf->bf_state.bfs_txflags = flags; 1554227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1555227364Sadrian 1556227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1557227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1558227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1559227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1560227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1561227364Sadrian 1562227364Sadrian return 0; 1563227364Sadrian} 1564227364Sadrian 1565227364Sadrian/* 1566227364Sadrian * Direct-dispatch the current frame to the hardware. 1567227364Sadrian * 1568227364Sadrian * This can be called by the net80211 code. 1569227364Sadrian * 1570227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1571227364Sadrian * XXX aggregate scheduler so its serialised? 1572227364Sadrian */ 1573227364Sadrianint 1574227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1575227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1576227364Sadrian{ 1577227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1578227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1579232764Sadrian int r = 0; 1580227364Sadrian u_int pri; 1581227364Sadrian int tid; 1582227364Sadrian struct ath_txq *txq; 1583227364Sadrian int ismcast; 1584227364Sadrian const struct ieee80211_frame *wh; 1585227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1586236872Sadrian ieee80211_seq seqno; 1587227364Sadrian uint8_t type, subtype; 1588227364Sadrian 1589227364Sadrian /* 1590227364Sadrian * Determine the target hardware queue. 1591218065Sadrian * 1592234009Sadrian * For multicast frames, the txq gets overridden appropriately 1593234009Sadrian * depending upon the state of PS. 1594227364Sadrian * 1595227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1596227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1597227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1598227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1599227364Sadrian * having a node TID queued to multiple hardware TXQs. 1600227364Sadrian * This may change in the future but would require some locking 1601227364Sadrian * fudgery. 1602218065Sadrian */ 1603227364Sadrian pri = ath_tx_getac(sc, m0); 1604227364Sadrian tid = ath_tx_gettid(sc, m0); 1605218065Sadrian 1606227364Sadrian txq = sc->sc_ac2q[pri]; 1607227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1608227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1609227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1610227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1611227364Sadrian 1612232764Sadrian /* 1613232764Sadrian * Enforce how deep the multicast queue can grow. 1614232764Sadrian * 1615232764Sadrian * XXX duplicated in ath_raw_xmit(). 1616232764Sadrian */ 1617232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1618232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1619232764Sadrian 1620232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1621232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1622232764Sadrian r = ENOBUFS; 1623232764Sadrian } 1624232764Sadrian 1625232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1626232764Sadrian 1627232764Sadrian if (r != 0) { 1628232764Sadrian m_freem(m0); 1629232764Sadrian return r; 1630232764Sadrian } 1631232764Sadrian } 1632232764Sadrian 1633227364Sadrian /* A-MPDU TX */ 1634227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1635227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1636227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1637227364Sadrian 1638236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1639236872Sadrian __func__, tid, pri, is_ampdu); 1640227364Sadrian 1641239051Sadrian /* Set local packet state, used to queue packets to hardware */ 1642239051Sadrian bf->bf_state.bfs_tid = tid; 1643239051Sadrian bf->bf_state.bfs_txq = txq; 1644239051Sadrian bf->bf_state.bfs_pri = pri; 1645239051Sadrian 1646232753Sadrian /* 1647234009Sadrian * When servicing one or more stations in power-save mode 1648234009Sadrian * (or) if there is some mcast data waiting on the mcast 1649234009Sadrian * queue (to prevent out of order delivery) multicast frames 1650234009Sadrian * must be bufferd until after the beacon. 1651234009Sadrian * 1652234009Sadrian * TODO: we should lock the mcastq before we check the length. 1653232753Sadrian */ 1654239051Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) { 1655227364Sadrian txq = &avp->av_mcastq; 1656239051Sadrian /* 1657239051Sadrian * Mark the frame as eventually belonging on the CAB 1658239051Sadrian * queue, so the descriptor setup functions will 1659239051Sadrian * correctly initialise the descriptor 'qcuId' field. 1660239051Sadrian */ 1661239051Sadrian bf->bf_state.bfs_txq = sc->sc_cabq; 1662239051Sadrian } 1663227364Sadrian 1664227364Sadrian /* Do the generic frame setup */ 1665227364Sadrian /* XXX should just bzero the bf_state? */ 1666227364Sadrian bf->bf_state.bfs_dobaw = 0; 1667227364Sadrian 1668236880Sadrian /* 1669236880Sadrian * Acquire the TXQ lock early, so both the encap and seqno 1670236880Sadrian * are allocated together. 1671239051Sadrian * 1672239051Sadrian * XXX should TXQ for CABQ traffic be the multicast queue, 1673239051Sadrian * or the TXQ the given PRI would allocate from? (eg for 1674239051Sadrian * sequence number allocation locking.) 1675236880Sadrian */ 1676236880Sadrian ATH_TXQ_LOCK(txq); 1677236880Sadrian 1678227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1679236880Sadrian /* 1680236880Sadrian * Don't do it whilst pending; the net80211 layer still 1681236880Sadrian * assigns them. 1682236880Sadrian */ 1683227364Sadrian if (is_ampdu_tx) { 1684227364Sadrian /* 1685227364Sadrian * Always call; this function will 1686227364Sadrian * handle making sure that null data frames 1687227364Sadrian * don't get a sequence number from the current 1688227364Sadrian * TID and thus mess with the BAW. 1689227364Sadrian */ 1690236872Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1691236874Sadrian 1692236874Sadrian /* 1693236874Sadrian * Don't add QoS NULL frames to the BAW. 1694236874Sadrian */ 1695236872Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1696236872Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1697227364Sadrian bf->bf_state.bfs_dobaw = 1; 1698227364Sadrian } 1699218240Sadrian } 1700218240Sadrian 1701218065Sadrian /* 1702227364Sadrian * If needed, the sequence number has been assigned. 1703227364Sadrian * Squirrel it away somewhere easy to get to. 1704218065Sadrian */ 1705236872Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1706227364Sadrian 1707227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1708227364Sadrian if (is_ampdu_pending) 1709227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1710227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1711227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1712227364Sadrian 1713227364Sadrian /* This also sets up the DMA map */ 1714234009Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0, txq); 1715227364Sadrian 1716227364Sadrian if (r != 0) 1717236880Sadrian goto done; 1718227364Sadrian 1719227364Sadrian /* At this point m0 could have changed! */ 1720227364Sadrian m0 = bf->bf_m; 1721227364Sadrian 1722227364Sadrian#if 1 1723218065Sadrian /* 1724227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1725227364Sadrian * destination hardware queue. Don't bother software 1726227364Sadrian * queuing it. 1727218065Sadrian */ 1728227364Sadrian /* 1729227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1730227364Sadrian * destination hardware queue. Don't bother software 1731227364Sadrian * queuing it, as the TID will now be paused. 1732227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1733227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1734227364Sadrian * It queues directly to hardware because the TID is paused 1735227364Sadrian * at this point (and won't be unpaused until the BAR has 1736227364Sadrian * either been TXed successfully or max retries has been 1737227364Sadrian * reached.) 1738227364Sadrian */ 1739227364Sadrian if (txq == &avp->av_mcastq) { 1740235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1741233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1742227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1743227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1744227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1745235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1746227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1747227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1748227364Sadrian } else { 1749227364Sadrian /* add to software queue */ 1750235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1751233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1752227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1753227364Sadrian } 1754227364Sadrian#else 1755227364Sadrian /* 1756227364Sadrian * For now, since there's no software queue, 1757227364Sadrian * direct-dispatch to the hardware. 1758227364Sadrian */ 1759227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1760236880Sadrian#endif 1761236880Sadriandone: 1762227364Sadrian ATH_TXQ_UNLOCK(txq); 1763218065Sadrian 1764218065Sadrian return 0; 1765218065Sadrian} 1766218065Sadrian 1767218065Sadrianstatic int 1768218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1769218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1770218065Sadrian const struct ieee80211_bpf_params *params) 1771218065Sadrian{ 1772218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1773218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1774218065Sadrian struct ath_hal *ah = sc->sc_ah; 1775218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1776218065Sadrian int error, ismcast, ismrr; 1777218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1778227364Sadrian u_int8_t rix, txrate; 1779218065Sadrian struct ieee80211_frame *wh; 1780227364Sadrian u_int flags; 1781218065Sadrian HAL_PKT_TYPE atype; 1782218065Sadrian const HAL_RATE_TABLE *rt; 1783218065Sadrian struct ath_desc *ds; 1784218065Sadrian u_int pri; 1785227364Sadrian int o_tid = -1; 1786227364Sadrian int do_override; 1787218065Sadrian 1788218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1789218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1790218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1791218065Sadrian /* 1792218065Sadrian * Packet length must not include any 1793218065Sadrian * pad bytes; deduct them here. 1794218065Sadrian */ 1795218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1796218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1797218065Sadrian 1798227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1799227364Sadrian __func__, ismcast); 1800227364Sadrian 1801236880Sadrian pri = params->ibp_pri & 3; 1802236880Sadrian /* Override pri if the frame isn't a QoS one */ 1803236880Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1804236880Sadrian pri = ath_tx_getac(sc, m0); 1805236880Sadrian 1806236880Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1807236880Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1808236880Sadrian 1809236880Sadrian /* Map ADDBA to the correct priority */ 1810236880Sadrian if (do_override) { 1811236880Sadrian#if 0 1812236880Sadrian device_printf(sc->sc_dev, 1813236880Sadrian "%s: overriding tid %d pri %d -> %d\n", 1814236880Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1815236880Sadrian#endif 1816236880Sadrian pri = TID_TO_WME_AC(o_tid); 1817236880Sadrian } 1818236880Sadrian 1819236880Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1820236880Sadrian 1821218154Sadrian /* Handle encryption twiddling if needed */ 1822227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1823227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1824227364Sadrian &hdrlen, &pktlen, &keyix)) { 1825218154Sadrian ath_freetx(m0); 1826218154Sadrian return EIO; 1827218154Sadrian } 1828218154Sadrian /* packet header may have moved, reset our local pointer */ 1829218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1830218065Sadrian 1831227364Sadrian /* Do the generic frame setup */ 1832227364Sadrian /* XXX should just bzero the bf_state? */ 1833227364Sadrian bf->bf_state.bfs_dobaw = 0; 1834227364Sadrian 1835218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1836218065Sadrian if (error != 0) 1837218065Sadrian return error; 1838218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1839218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1840218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1841218065Sadrian 1842218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1843218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1844218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1845218065Sadrian flags |= HAL_TXDESC_RTSENA; 1846227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1847227364Sadrian /* XXX assume 11g/11n protection? */ 1848227364Sadrian bf->bf_state.bfs_doprot = 1; 1849218065Sadrian flags |= HAL_TXDESC_CTSENA; 1850227364Sadrian } 1851218065Sadrian /* XXX leave ismcast to injector? */ 1852218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1853218065Sadrian flags |= HAL_TXDESC_NOACK; 1854218065Sadrian 1855218065Sadrian rt = sc->sc_currates; 1856218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1857218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1858218065Sadrian txrate = rt->info[rix].rateCode; 1859218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1860218065Sadrian txrate |= rt->info[rix].shortPreamble; 1861218065Sadrian sc->sc_txrix = rix; 1862218065Sadrian try0 = params->ibp_try0; 1863218065Sadrian ismrr = (params->ibp_try1 != 0); 1864218065Sadrian txantenna = params->ibp_pri >> 2; 1865218065Sadrian if (txantenna == 0) /* XXX? */ 1866218065Sadrian txantenna = sc->sc_txantenna; 1867218157Sadrian 1868227364Sadrian /* 1869227364Sadrian * Since ctsrate is fixed, store it away for later 1870227364Sadrian * use when the descriptor fields are being set. 1871227364Sadrian */ 1872227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1873227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1874218157Sadrian 1875218065Sadrian /* 1876218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1877218065Sadrian * set the sequence number, duration, etc. 1878218065Sadrian */ 1879218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1880218065Sadrian 1881218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1882218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1883218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1884218065Sadrian 1885218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1886218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1887218065Sadrian 1888218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1889218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1890218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1891218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1892218065Sadrian if (m0->m_flags & M_FRAG) 1893218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1894218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1895218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1896218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1897218065Sadrian 1898218065Sadrian ieee80211_radiotap_tx(vap, m0); 1899218065Sadrian } 1900218065Sadrian 1901218065Sadrian /* 1902218065Sadrian * Formulate first tx descriptor with tx controls. 1903218065Sadrian */ 1904218065Sadrian ds = bf->bf_desc; 1905218065Sadrian /* XXX check return value? */ 1906227364Sadrian 1907227364Sadrian /* Store the decided rate index values away */ 1908227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1909227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1910227364Sadrian bf->bf_state.bfs_atype = atype; 1911227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1912227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1913227364Sadrian bf->bf_state.bfs_try0 = try0; 1914227364Sadrian bf->bf_state.bfs_keyix = keyix; 1915227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1916233966Sadrian bf->bf_state.bfs_txflags = flags; 1917227364Sadrian bf->bf_state.bfs_shpream = 1918227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1919218065Sadrian 1920239051Sadrian /* Set local packet state, used to queue packets to hardware */ 1921239051Sadrian bf->bf_state.bfs_tid = WME_AC_TO_TID(pri); 1922239051Sadrian bf->bf_state.bfs_txq = sc->sc_ac2q[pri]; 1923239051Sadrian bf->bf_state.bfs_pri = pri; 1924239051Sadrian 1925227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1926227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1927227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1928227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1929218240Sadrian 1930227364Sadrian /* Blank the legacy rate array */ 1931227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1932218240Sadrian 1933227364Sadrian bf->bf_state.bfs_rc[0].rix = 1934227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1935227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1936227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1937227364Sadrian 1938227364Sadrian if (ismrr) { 1939227364Sadrian int rix; 1940227364Sadrian 1941227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1942227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1943227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1944227364Sadrian 1945227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1946227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1947227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1948227364Sadrian 1949227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1950227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1951227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1952218065Sadrian } 1953227364Sadrian /* 1954227364Sadrian * All the required rate control decisions have been made; 1955227364Sadrian * fill in the rc flags. 1956227364Sadrian */ 1957227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1958218065Sadrian 1959227364Sadrian /* NB: no buffered multicast in power save support */ 1960227364Sadrian 1961227364Sadrian /* 1962227364Sadrian * If we're overiding the ADDBA destination, dump directly 1963227364Sadrian * into the hardware queue, right after any pending 1964227364Sadrian * frames to that node are. 1965227364Sadrian */ 1966227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1967227364Sadrian __func__, do_override); 1968227364Sadrian 1969227364Sadrian if (do_override) { 1970227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1971227364Sadrian } else { 1972227364Sadrian /* Queue to software queue */ 1973227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1974227364Sadrian } 1975236880Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1976227364Sadrian 1977218065Sadrian return 0; 1978218065Sadrian} 1979218065Sadrian 1980227364Sadrian/* 1981227364Sadrian * Send a raw frame. 1982227364Sadrian * 1983227364Sadrian * This can be called by net80211. 1984227364Sadrian */ 1985218065Sadrianint 1986218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1987218065Sadrian const struct ieee80211_bpf_params *params) 1988218065Sadrian{ 1989218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1990218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1991218065Sadrian struct ath_softc *sc = ifp->if_softc; 1992218065Sadrian struct ath_buf *bf; 1993232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1994232764Sadrian int error = 0; 1995218065Sadrian 1996227651Sadrian ATH_PCU_LOCK(sc); 1997227651Sadrian if (sc->sc_inreset_cnt > 0) { 1998227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 1999227651Sadrian __func__); 2000227651Sadrian error = EIO; 2001227651Sadrian ATH_PCU_UNLOCK(sc); 2002227651Sadrian goto bad0; 2003227651Sadrian } 2004227651Sadrian sc->sc_txstart_cnt++; 2005227651Sadrian ATH_PCU_UNLOCK(sc); 2006227651Sadrian 2007218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 2008218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 2009218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 2010218065Sadrian "!running" : "invalid"); 2011218065Sadrian m_freem(m); 2012218065Sadrian error = ENETDOWN; 2013218065Sadrian goto bad; 2014218065Sadrian } 2015232764Sadrian 2016218065Sadrian /* 2017232764Sadrian * Enforce how deep the multicast queue can grow. 2018232764Sadrian * 2019232764Sadrian * XXX duplicated in ath_tx_start(). 2020232764Sadrian */ 2021232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2022232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 2023232764Sadrian 2024232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 2025232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 2026232764Sadrian error = ENOBUFS; 2027232764Sadrian } 2028232764Sadrian 2029232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 2030232764Sadrian 2031232764Sadrian if (error != 0) { 2032232764Sadrian m_freem(m); 2033232764Sadrian goto bad; 2034232764Sadrian } 2035232764Sadrian } 2036232764Sadrian 2037232764Sadrian /* 2038218065Sadrian * Grab a TX buffer and associated resources. 2039218065Sadrian */ 2040237000Sadrian bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 2041218065Sadrian if (bf == NULL) { 2042218065Sadrian sc->sc_stats.ast_tx_nobuf++; 2043218065Sadrian m_freem(m); 2044218065Sadrian error = ENOBUFS; 2045218065Sadrian goto bad; 2046218065Sadrian } 2047218065Sadrian 2048218065Sadrian if (params == NULL) { 2049218065Sadrian /* 2050218065Sadrian * Legacy path; interpret frame contents to decide 2051218065Sadrian * precisely how to send the frame. 2052218065Sadrian */ 2053218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 2054218065Sadrian error = EIO; /* XXX */ 2055218065Sadrian goto bad2; 2056218065Sadrian } 2057218065Sadrian } else { 2058218065Sadrian /* 2059218065Sadrian * Caller supplied explicit parameters to use in 2060218065Sadrian * sending the frame. 2061218065Sadrian */ 2062218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 2063218065Sadrian error = EIO; /* XXX */ 2064218065Sadrian goto bad2; 2065218065Sadrian } 2066218065Sadrian } 2067218065Sadrian sc->sc_wd_timer = 5; 2068218065Sadrian ifp->if_opackets++; 2069218065Sadrian sc->sc_stats.ast_tx_raw++; 2070218065Sadrian 2071227651Sadrian ATH_PCU_LOCK(sc); 2072227651Sadrian sc->sc_txstart_cnt--; 2073227651Sadrian ATH_PCU_UNLOCK(sc); 2074227651Sadrian 2075218065Sadrian return 0; 2076218065Sadrianbad2: 2077218065Sadrian ATH_TXBUF_LOCK(sc); 2078236993Sadrian ath_returnbuf_head(sc, bf); 2079218065Sadrian ATH_TXBUF_UNLOCK(sc); 2080218065Sadrianbad: 2081227651Sadrian ATH_PCU_LOCK(sc); 2082227651Sadrian sc->sc_txstart_cnt--; 2083227651Sadrian ATH_PCU_UNLOCK(sc); 2084227651Sadrianbad0: 2085218065Sadrian ifp->if_oerrors++; 2086218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 2087218065Sadrian ieee80211_free_node(ni); 2088227651Sadrian 2089218065Sadrian return error; 2090218065Sadrian} 2091227364Sadrian 2092227364Sadrian/* Some helper functions */ 2093227364Sadrian 2094227364Sadrian/* 2095227364Sadrian * ADDBA (and potentially others) need to be placed in the same 2096227364Sadrian * hardware queue as the TID/node it's relating to. This is so 2097227364Sadrian * it goes out after any pending non-aggregate frames to the 2098227364Sadrian * same node/TID. 2099227364Sadrian * 2100227364Sadrian * If this isn't done, the ADDBA can go out before the frames 2101227364Sadrian * queued in hardware. Even though these frames have a sequence 2102227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 2103227364Sadrian * no frames whose sequence numbers are after the ADDBA should 2104227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 2105227364Sadrian * will simply drop them as being out of the BAW. 2106227364Sadrian * 2107227364Sadrian * The frames can't be appended to the TID software queue - it'll 2108227364Sadrian * never be sent out. So these frames have to be directly 2109227364Sadrian * dispatched to the hardware, rather than queued in software. 2110227364Sadrian * So if this function returns true, the TXQ has to be 2111227364Sadrian * overridden and it has to be directly dispatched. 2112227364Sadrian * 2113227364Sadrian * It's a dirty hack, but someone's gotta do it. 2114227364Sadrian */ 2115227364Sadrian 2116227364Sadrian/* 2117227364Sadrian * XXX doesn't belong here! 2118227364Sadrian */ 2119227364Sadrianstatic int 2120227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 2121227364Sadrian{ 2122227364Sadrian /* Type: Management frame? */ 2123227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 2124227364Sadrian IEEE80211_FC0_TYPE_MGT) 2125227364Sadrian return 0; 2126227364Sadrian 2127227364Sadrian /* Subtype: Action frame? */ 2128227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 2129227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 2130227364Sadrian return 0; 2131227364Sadrian 2132227364Sadrian return 1; 2133227364Sadrian} 2134227364Sadrian 2135227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 2136227364Sadrian/* 2137227364Sadrian * Return an alternate TID for ADDBA request frames. 2138227364Sadrian * 2139227364Sadrian * Yes, this likely should be done in the net80211 layer. 2140227364Sadrian */ 2141227364Sadrianstatic int 2142227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 2143227364Sadrian struct ieee80211_node *ni, 2144227364Sadrian struct mbuf *m0, int *tid) 2145227364Sadrian{ 2146227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 2147227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 2148227364Sadrian uint8_t *frm; 2149227364Sadrian uint16_t baparamset; 2150227364Sadrian 2151227364Sadrian /* Not action frame? Bail */ 2152227364Sadrian if (! ieee80211_is_action(wh)) 2153227364Sadrian return 0; 2154227364Sadrian 2155227364Sadrian /* XXX Not needed for frames we send? */ 2156227364Sadrian#if 0 2157227364Sadrian /* Correct length? */ 2158227364Sadrian if (! ieee80211_parse_action(ni, m)) 2159227364Sadrian return 0; 2160227364Sadrian#endif 2161227364Sadrian 2162227364Sadrian /* Extract out action frame */ 2163227364Sadrian frm = (u_int8_t *)&wh[1]; 2164227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 2165227364Sadrian 2166227364Sadrian /* Not ADDBA? Bail */ 2167227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 2168227364Sadrian return 0; 2169227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 2170227364Sadrian return 0; 2171227364Sadrian 2172227364Sadrian /* Extract TID, return it */ 2173227364Sadrian baparamset = le16toh(ia->rq_baparamset); 2174227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 2175227364Sadrian 2176227364Sadrian return 1; 2177227364Sadrian} 2178227364Sadrian#undef MS 2179227364Sadrian 2180227364Sadrian/* Per-node software queue operations */ 2181227364Sadrian 2182227364Sadrian/* 2183227364Sadrian * Add the current packet to the given BAW. 2184227364Sadrian * It is assumed that the current packet 2185227364Sadrian * 2186227364Sadrian * + fits inside the BAW; 2187227364Sadrian * + already has had a sequence number allocated. 2188227364Sadrian * 2189227364Sadrian * Since the BAW status may be modified by both the ath task and 2190227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2191227364Sadrian */ 2192227364Sadrianvoid 2193227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 2194227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 2195227364Sadrian{ 2196227364Sadrian int index, cindex; 2197227364Sadrian struct ieee80211_tx_ampdu *tap; 2198227364Sadrian 2199227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2200236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2201227364Sadrian 2202227364Sadrian if (bf->bf_state.bfs_isretried) 2203227364Sadrian return; 2204227364Sadrian 2205236886Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2206236886Sadrian 2207236880Sadrian if (! bf->bf_state.bfs_dobaw) { 2208236880Sadrian device_printf(sc->sc_dev, 2209236880Sadrian "%s: dobaw=0, seqno=%d, window %d:%d\n", 2210236880Sadrian __func__, 2211236880Sadrian SEQNO(bf->bf_state.bfs_seqno), 2212236880Sadrian tap->txa_start, 2213236880Sadrian tap->txa_wnd); 2214236880Sadrian } 2215236880Sadrian 2216227364Sadrian if (bf->bf_state.bfs_addedbaw) 2217227364Sadrian device_printf(sc->sc_dev, 2218236872Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 2219229949Sadrian "baw head=%d tail=%d\n", 2220236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2221229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2222229949Sadrian tid->baw_tail); 2223227364Sadrian 2224227364Sadrian /* 2225236880Sadrian * Verify that the given sequence number is not outside of the 2226236880Sadrian * BAW. Complain loudly if that's the case. 2227236880Sadrian */ 2228236880Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2229236880Sadrian SEQNO(bf->bf_state.bfs_seqno))) { 2230236880Sadrian device_printf(sc->sc_dev, 2231236880Sadrian "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; " 2232236880Sadrian "baw head=%d tail=%d\n", 2233236880Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2234236880Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2235236880Sadrian tid->baw_tail); 2236236880Sadrian } 2237236880Sadrian 2238236880Sadrian /* 2239227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2240227364Sadrian * the txa state contains the current baw start. 2241227364Sadrian */ 2242227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2243227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2244227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2245236872Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2246229949Sadrian "baw head=%d tail=%d\n", 2247236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2248229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2249229949Sadrian tid->baw_tail); 2250227364Sadrian 2251227364Sadrian 2252227364Sadrian#if 0 2253227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2254227364Sadrian#endif 2255227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2256227364Sadrian device_printf(sc->sc_dev, 2257227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2258227364Sadrian "head=%d, tail=%d)\n", 2259227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2260227364Sadrian device_printf(sc->sc_dev, 2261227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2262227364Sadrian __func__, 2263227364Sadrian tid->tx_buf[cindex], 2264227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2265227364Sadrian bf, 2266227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2267227364Sadrian ); 2268227364Sadrian } 2269227364Sadrian tid->tx_buf[cindex] = bf; 2270227364Sadrian 2271229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2272229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2273227364Sadrian tid->baw_tail = cindex; 2274227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2275227364Sadrian } 2276227364Sadrian} 2277227364Sadrian 2278227364Sadrian/* 2279227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2280227398Sadrian * 2281227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2282227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2283227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2284227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2285227398Sadrian * tracking array to maintain consistency. 2286227398Sadrian */ 2287227398Sadrianstatic void 2288227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2289227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2290227398Sadrian{ 2291227398Sadrian int index, cindex; 2292227398Sadrian struct ieee80211_tx_ampdu *tap; 2293227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2294227398Sadrian 2295227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2296236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2297227398Sadrian 2298227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2299227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2300227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2301227398Sadrian 2302227398Sadrian /* 2303227398Sadrian * Just warn for now; if it happens then we should find out 2304227398Sadrian * about it. It's highly likely the aggregation session will 2305227398Sadrian * soon hang. 2306227398Sadrian */ 2307227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2308227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2309227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2310227398Sadrian __func__); 2311227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2312227398Sadrian __func__, 2313227398Sadrian old_bf->bf_state.bfs_seqno, 2314227398Sadrian new_bf->bf_state.bfs_seqno); 2315227398Sadrian } 2316227398Sadrian 2317227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2318227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2319227398Sadrian " has m BA session may hang.\n", 2320227398Sadrian __func__); 2321227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2322227398Sadrian __func__, 2323227398Sadrian old_bf, new_bf); 2324227398Sadrian } 2325227398Sadrian 2326227398Sadrian tid->tx_buf[cindex] = new_bf; 2327227398Sadrian} 2328227398Sadrian 2329227398Sadrian/* 2330227364Sadrian * seq_start - left edge of BAW 2331227364Sadrian * seq_next - current/next sequence number to allocate 2332227364Sadrian * 2333227364Sadrian * Since the BAW status may be modified by both the ath task and 2334227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2335227364Sadrian */ 2336227364Sadrianstatic void 2337227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2338227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2339227364Sadrian{ 2340227364Sadrian int index, cindex; 2341227364Sadrian struct ieee80211_tx_ampdu *tap; 2342227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2343227364Sadrian 2344227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2345236879Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2346227364Sadrian 2347227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2348227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2349227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2350227364Sadrian 2351227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2352236872Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2353229949Sadrian "baw head=%d, tail=%d\n", 2354236872Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2355227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2356227364Sadrian 2357227364Sadrian /* 2358227364Sadrian * If this occurs then we have a big problem - something else 2359227364Sadrian * has slid tap->txa_start along without updating the BAW 2360227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2361227364Sadrian * completely busted. 2362227364Sadrian * 2363227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2364227364Sadrian * it's quite possible that a cloned buffer is making its way 2365227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2366227364Sadrian */ 2367227364Sadrian if (tid->tx_buf[cindex] != bf) { 2368227364Sadrian device_printf(sc->sc_dev, 2369227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2370227364Sadrian __func__, 2371227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2372227364Sadrian tid->tx_buf[cindex], 2373227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2374227364Sadrian } 2375227364Sadrian 2376227364Sadrian tid->tx_buf[cindex] = NULL; 2377227364Sadrian 2378229949Sadrian while (tid->baw_head != tid->baw_tail && 2379229949Sadrian !tid->tx_buf[tid->baw_head]) { 2380227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2381227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2382227364Sadrian } 2383229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2384229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2385227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2386227364Sadrian} 2387227364Sadrian 2388227364Sadrian/* 2389227364Sadrian * Mark the current node/TID as ready to TX. 2390227364Sadrian * 2391227364Sadrian * This is done to make it easy for the software scheduler to 2392227364Sadrian * find which nodes have data to send. 2393227364Sadrian * 2394227364Sadrian * The TXQ lock must be held. 2395227364Sadrian */ 2396227364Sadrianstatic void 2397227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2398227364Sadrian{ 2399227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2400227364Sadrian 2401227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2402227364Sadrian 2403227364Sadrian if (tid->paused) 2404227364Sadrian return; /* paused, can't schedule yet */ 2405227364Sadrian 2406227364Sadrian if (tid->sched) 2407227364Sadrian return; /* already scheduled */ 2408227364Sadrian 2409227364Sadrian tid->sched = 1; 2410227364Sadrian 2411227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2412227364Sadrian} 2413227364Sadrian 2414227364Sadrian/* 2415227364Sadrian * Mark the current node as no longer needing to be polled for 2416227364Sadrian * TX packets. 2417227364Sadrian * 2418227364Sadrian * The TXQ lock must be held. 2419227364Sadrian */ 2420227364Sadrianstatic void 2421227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2422227364Sadrian{ 2423227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2424227364Sadrian 2425227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2426227364Sadrian 2427227364Sadrian if (tid->sched == 0) 2428227364Sadrian return; 2429227364Sadrian 2430227364Sadrian tid->sched = 0; 2431227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2432227364Sadrian} 2433227364Sadrian 2434227364Sadrian/* 2435227364Sadrian * Assign a sequence number manually to the given frame. 2436227364Sadrian * 2437227364Sadrian * This should only be called for A-MPDU TX frames. 2438227364Sadrian */ 2439236872Sadrianstatic ieee80211_seq 2440227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2441227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2442227364Sadrian{ 2443227364Sadrian struct ieee80211_frame *wh; 2444227364Sadrian int tid, pri; 2445227364Sadrian ieee80211_seq seqno; 2446227364Sadrian uint8_t subtype; 2447227364Sadrian 2448227364Sadrian /* TID lookup */ 2449227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2450227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2451227364Sadrian tid = WME_AC_TO_TID(pri); 2452236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2453236872Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2454227364Sadrian 2455227364Sadrian /* XXX Is it a control frame? Ignore */ 2456227364Sadrian 2457227364Sadrian /* Does the packet require a sequence number? */ 2458227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2459227364Sadrian return -1; 2460227364Sadrian 2461236880Sadrian ATH_TID_LOCK_ASSERT(sc, &(ATH_NODE(ni)->an_tid[tid])); 2462236880Sadrian 2463227364Sadrian /* 2464227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2465227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2466227364Sadrian * 2467227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2468227364Sadrian * data frame sequence number in the aggregation state updates, so 2469227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2470227364Sadrian * RX side. 2471227364Sadrian */ 2472227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2473227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2474236880Sadrian /* XXX no locking for this TID? This is a bit of a problem. */ 2475227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2476227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2477227364Sadrian } else { 2478227364Sadrian /* Manually assign sequence number */ 2479227364Sadrian seqno = ni->ni_txseqs[tid]; 2480227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2481227364Sadrian } 2482227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2483227364Sadrian M_SEQNO_SET(m0, seqno); 2484227364Sadrian 2485227364Sadrian /* Return so caller can do something with it if needed */ 2486236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2487227364Sadrian return seqno; 2488227364Sadrian} 2489227364Sadrian 2490227364Sadrian/* 2491227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2492227364Sadrian * If the frame is out of BAW, queue. 2493227364Sadrian * Otherwise, schedule it as a single frame. 2494227364Sadrian */ 2495227364Sadrianstatic void 2496239051Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, 2497239051Sadrian struct ath_txq *txq, struct ath_buf *bf) 2498227364Sadrian{ 2499227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2500239051Sadrian// struct ath_txq *txq = bf->bf_state.bfs_txq; 2501227364Sadrian struct ieee80211_tx_ampdu *tap; 2502227364Sadrian 2503239051Sadrian if (txq != bf->bf_state.bfs_txq) { 2504239051Sadrian device_printf(sc->sc_dev, "%s: txq %d != bfs_txq %d!\n", 2505239051Sadrian __func__, 2506239051Sadrian txq->axq_qnum, 2507239051Sadrian bf->bf_state.bfs_txq->axq_qnum); 2508239051Sadrian } 2509239051Sadrian 2510227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2511236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2512227364Sadrian 2513227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2514227364Sadrian 2515227364Sadrian /* paused? queue */ 2516227364Sadrian if (tid->paused) { 2517236876Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2518233480Sadrian /* XXX don't sched - we're paused! */ 2519227364Sadrian return; 2520227364Sadrian } 2521227364Sadrian 2522227364Sadrian /* outside baw? queue */ 2523227364Sadrian if (bf->bf_state.bfs_dobaw && 2524227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2525227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2526236878Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2527227364Sadrian ath_tx_tid_sched(sc, tid); 2528227364Sadrian return; 2529227364Sadrian } 2530227364Sadrian 2531240180Sadrian /* 2532240180Sadrian * This is a temporary check and should be removed once 2533240180Sadrian * all the relevant code paths have been fixed. 2534240180Sadrian * 2535240180Sadrian * During aggregate retries, it's possible that the head 2536240180Sadrian * frame will fail (which has the bfs_aggr and bfs_nframes 2537240180Sadrian * fields set for said aggregate) and will be retried as 2538240180Sadrian * a single frame. In this instance, the values should 2539240180Sadrian * be reset or the completion code will get upset with you. 2540240180Sadrian */ 2541240180Sadrian if (bf->bf_state.bfs_aggr != 0 || bf->bf_state.bfs_nframes > 1) { 2542240180Sadrian device_printf(sc->sc_dev, "%s: bfs_aggr=%d, bfs_nframes=%d\n", 2543240180Sadrian __func__, 2544240180Sadrian bf->bf_state.bfs_aggr, 2545240180Sadrian bf->bf_state.bfs_nframes); 2546240180Sadrian bf->bf_state.bfs_aggr = 0; 2547240180Sadrian bf->bf_state.bfs_nframes = 1; 2548240180Sadrian } 2549240180Sadrian 2550227364Sadrian /* Direct dispatch to hardware */ 2551227364Sadrian ath_tx_do_ratelookup(sc, bf); 2552233989Sadrian ath_tx_calc_duration(sc, bf); 2553233989Sadrian ath_tx_calc_protection(sc, bf); 2554233989Sadrian ath_tx_set_rtscts(sc, bf); 2555227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2556227364Sadrian ath_tx_setds(sc, bf); 2557227364Sadrian 2558227364Sadrian /* Statistics */ 2559227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2560227364Sadrian 2561227364Sadrian /* Track per-TID hardware queue depth correctly */ 2562227364Sadrian tid->hwq_depth++; 2563227364Sadrian 2564227364Sadrian /* Add to BAW */ 2565227364Sadrian if (bf->bf_state.bfs_dobaw) { 2566227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2567227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2568227364Sadrian } 2569227364Sadrian 2570227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2571227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2572227364Sadrian 2573227364Sadrian /* Hand off to hardware */ 2574227364Sadrian ath_tx_handoff(sc, txq, bf); 2575227364Sadrian} 2576227364Sadrian 2577227364Sadrian/* 2578227364Sadrian * Attempt to send the packet. 2579227364Sadrian * If the queue isn't busy, direct-dispatch. 2580227364Sadrian * If the queue is busy enough, queue the given packet on the 2581227364Sadrian * relevant software queue. 2582227364Sadrian */ 2583227364Sadrianvoid 2584227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2585227364Sadrian struct ath_buf *bf) 2586227364Sadrian{ 2587227364Sadrian struct ath_node *an = ATH_NODE(ni); 2588227364Sadrian struct ieee80211_frame *wh; 2589227364Sadrian struct ath_tid *atid; 2590227364Sadrian int pri, tid; 2591227364Sadrian struct mbuf *m0 = bf->bf_m; 2592227364Sadrian 2593236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2594236880Sadrian 2595227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2596227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2597227364Sadrian pri = ath_tx_getac(sc, m0); 2598227364Sadrian tid = ath_tx_gettid(sc, m0); 2599227364Sadrian atid = &an->an_tid[tid]; 2600227364Sadrian 2601236873Sadrian ATH_TID_LOCK_ASSERT(sc, atid); 2602236873Sadrian 2603236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2604236872Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2605227364Sadrian 2606227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2607239051Sadrian /* XXX potentially duplicate info, re-check */ 2608239051Sadrian /* XXX remember, txq must be the hardware queue, not the av_mcastq */ 2609227364Sadrian bf->bf_state.bfs_tid = tid; 2610227364Sadrian bf->bf_state.bfs_txq = txq; 2611227364Sadrian bf->bf_state.bfs_pri = pri; 2612227364Sadrian 2613227364Sadrian /* 2614227364Sadrian * If the hardware queue isn't busy, queue it directly. 2615227364Sadrian * If the hardware queue is busy, queue it. 2616227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2617227364Sadrian * queue it. 2618227364Sadrian */ 2619227364Sadrian if (atid->paused) { 2620227364Sadrian /* TID is paused, queue */ 2621236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2622227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2623227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2624227364Sadrian /* AMPDU pending; queue */ 2625236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2626227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2627227364Sadrian /* XXX sched? */ 2628227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2629227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2630236877Sadrian 2631236877Sadrian /* 2632236877Sadrian * Always queue the frame to the tail of the list. 2633236877Sadrian */ 2634236877Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2635236877Sadrian 2636236877Sadrian /* 2637236877Sadrian * If the hardware queue isn't busy, direct dispatch 2638236877Sadrian * the head frame in the list. Don't schedule the 2639236877Sadrian * TID - let it build some more frames first? 2640236877Sadrian * 2641236877Sadrian * Otherwise, schedule the TID. 2642236877Sadrian */ 2643229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2644236877Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2645236877Sadrian ATH_TXQ_REMOVE(atid, bf, bf_list); 2646240180Sadrian 2647240180Sadrian /* 2648240180Sadrian * Ensure it's definitely treated as a non-AMPDU 2649240180Sadrian * frame - this information may have been left 2650240180Sadrian * over from a previous attempt. 2651240180Sadrian */ 2652240180Sadrian bf->bf_state.bfs_aggr = 0; 2653240180Sadrian bf->bf_state.bfs_nframes = 1; 2654240180Sadrian 2655240180Sadrian /* Queue to the hardware */ 2656239051Sadrian ath_tx_xmit_aggr(sc, an, txq, bf); 2657233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2658236872Sadrian "%s: xmit_aggr\n", 2659236872Sadrian __func__); 2660229949Sadrian } else { 2661229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2662236872Sadrian "%s: ampdu; swq'ing\n", 2663236872Sadrian __func__); 2664227364Sadrian ath_tx_tid_sched(sc, atid); 2665227364Sadrian } 2666227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2667227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2668236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2669227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2670227364Sadrian } else { 2671227364Sadrian /* Busy; queue */ 2672236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2673227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2674227364Sadrian ath_tx_tid_sched(sc, atid); 2675227364Sadrian } 2676227364Sadrian} 2677227364Sadrian 2678227364Sadrian/* 2679227364Sadrian * Do the basic frame setup stuff that's required before the frame 2680227364Sadrian * is added to a software queue. 2681227364Sadrian * 2682227364Sadrian * All frames get mostly the same treatment and it's done once. 2683227364Sadrian * Retransmits fiddle with things like the rate control setup, 2684227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2685227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2686227364Sadrian * 2687227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2688227364Sadrian * m0 may not be valid. 2689227364Sadrian */ 2690227364Sadrian 2691227364Sadrian 2692227364Sadrian/* 2693227364Sadrian * Configure the per-TID node state. 2694227364Sadrian * 2695227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2696227364Sadrian * else to put it just yet. 2697227364Sadrian * 2698227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2699227364Sadrian */ 2700227364Sadrianvoid 2701227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2702227364Sadrian{ 2703227364Sadrian int i, j; 2704227364Sadrian struct ath_tid *atid; 2705227364Sadrian 2706227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2707227364Sadrian atid = &an->an_tid[i]; 2708227364Sadrian TAILQ_INIT(&atid->axq_q); 2709227364Sadrian atid->tid = i; 2710227364Sadrian atid->an = an; 2711227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2712227364Sadrian atid->tx_buf[j] = NULL; 2713227364Sadrian atid->baw_head = atid->baw_tail = 0; 2714227364Sadrian atid->paused = 0; 2715227364Sadrian atid->sched = 0; 2716227364Sadrian atid->hwq_depth = 0; 2717227364Sadrian atid->cleanup_inprogress = 0; 2718227364Sadrian if (i == IEEE80211_NONQOS_TID) 2719227364Sadrian atid->ac = WME_AC_BE; 2720227364Sadrian else 2721227364Sadrian atid->ac = TID_TO_WME_AC(i); 2722227364Sadrian } 2723227364Sadrian} 2724227364Sadrian 2725227364Sadrian/* 2726227364Sadrian * Pause the current TID. This stops packets from being transmitted 2727227364Sadrian * on it. 2728227364Sadrian * 2729227364Sadrian * Since this is also called from upper layers as well as the driver, 2730227364Sadrian * it will get the TID lock. 2731227364Sadrian */ 2732227364Sadrianstatic void 2733227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2734227364Sadrian{ 2735233908Sadrian 2736233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2737227364Sadrian tid->paused++; 2738227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2739227364Sadrian __func__, tid->paused); 2740227364Sadrian} 2741227364Sadrian 2742227364Sadrian/* 2743227364Sadrian * Unpause the current TID, and schedule it if needed. 2744227364Sadrian */ 2745227364Sadrianstatic void 2746227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2747227364Sadrian{ 2748227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2749227364Sadrian 2750227364Sadrian tid->paused--; 2751227364Sadrian 2752227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2753227364Sadrian __func__, tid->paused); 2754227364Sadrian 2755227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2756227364Sadrian return; 2757227364Sadrian } 2758227364Sadrian 2759227364Sadrian ath_tx_tid_sched(sc, tid); 2760227364Sadrian /* Punt some frames to the hardware if needed */ 2761233673Sadrian //ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2762233673Sadrian taskqueue_enqueue(sc->sc_tq, &sc->sc_txqtask); 2763227364Sadrian} 2764227364Sadrian 2765227364Sadrian/* 2766233908Sadrian * Suspend the queue because we need to TX a BAR. 2767233908Sadrian */ 2768233908Sadrianstatic void 2769233908Sadrianath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid) 2770233908Sadrian{ 2771233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2772233908Sadrian 2773235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2774235676Sadrian "%s: tid=%p, bar_wait=%d, bar_tx=%d, called\n", 2775233908Sadrian __func__, 2776235676Sadrian tid, 2777235676Sadrian tid->bar_wait, 2778235676Sadrian tid->bar_tx); 2779233908Sadrian 2780233908Sadrian /* We shouldn't be called when bar_tx is 1 */ 2781233908Sadrian if (tid->bar_tx) { 2782233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx is 1?!\n", 2783233908Sadrian __func__); 2784233908Sadrian } 2785233908Sadrian 2786233908Sadrian /* If we've already been called, just be patient. */ 2787233908Sadrian if (tid->bar_wait) 2788233908Sadrian return; 2789233908Sadrian 2790233908Sadrian /* Wait! */ 2791233908Sadrian tid->bar_wait = 1; 2792233908Sadrian 2793233908Sadrian /* Only one pause, no matter how many frames fail */ 2794233908Sadrian ath_tx_tid_pause(sc, tid); 2795233908Sadrian} 2796233908Sadrian 2797233908Sadrian/* 2798233908Sadrian * We've finished with BAR handling - either we succeeded or 2799233908Sadrian * failed. Either way, unsuspend TX. 2800233908Sadrian */ 2801233908Sadrianstatic void 2802233908Sadrianath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid) 2803233908Sadrian{ 2804233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2805233908Sadrian 2806235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2807233908Sadrian "%s: tid=%p, called\n", 2808233908Sadrian __func__, 2809233908Sadrian tid); 2810233908Sadrian 2811233908Sadrian if (tid->bar_tx == 0 || tid->bar_wait == 0) { 2812233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx=%d, bar_wait=%d: ?\n", 2813233908Sadrian __func__, tid->bar_tx, tid->bar_wait); 2814233908Sadrian } 2815233908Sadrian 2816233908Sadrian tid->bar_tx = tid->bar_wait = 0; 2817233908Sadrian ath_tx_tid_resume(sc, tid); 2818233908Sadrian} 2819233908Sadrian 2820233908Sadrian/* 2821233908Sadrian * Return whether we're ready to TX a BAR frame. 2822233908Sadrian * 2823233908Sadrian * Requires the TID lock be held. 2824233908Sadrian */ 2825233908Sadrianstatic int 2826233908Sadrianath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid) 2827233908Sadrian{ 2828233908Sadrian 2829233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2830233908Sadrian 2831233908Sadrian if (tid->bar_wait == 0 || tid->hwq_depth > 0) 2832233908Sadrian return (0); 2833233908Sadrian 2834235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, "%s: tid=%p (%d), bar ready\n", 2835235491Sadrian __func__, tid, tid->tid); 2836235491Sadrian 2837233908Sadrian return (1); 2838233908Sadrian} 2839233908Sadrian 2840233908Sadrian/* 2841233908Sadrian * Check whether the current TID is ready to have a BAR 2842233908Sadrian * TXed and if so, do the TX. 2843233908Sadrian * 2844233908Sadrian * Since the TID/TXQ lock can't be held during a call to 2845233908Sadrian * ieee80211_send_bar(), we have to do the dirty thing of unlocking it, 2846233908Sadrian * sending the BAR and locking it again. 2847233908Sadrian * 2848233908Sadrian * Eventually, the code to send the BAR should be broken out 2849233908Sadrian * from this routine so the lock doesn't have to be reacquired 2850233908Sadrian * just to be immediately dropped by the caller. 2851233908Sadrian */ 2852233908Sadrianstatic void 2853233908Sadrianath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid) 2854233908Sadrian{ 2855233908Sadrian struct ieee80211_tx_ampdu *tap; 2856233908Sadrian 2857233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2858233908Sadrian 2859235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2860233908Sadrian "%s: tid=%p, called\n", 2861233908Sadrian __func__, 2862233908Sadrian tid); 2863233908Sadrian 2864233908Sadrian tap = ath_tx_get_tx_tid(tid->an, tid->tid); 2865233908Sadrian 2866233908Sadrian /* 2867233908Sadrian * This is an error condition! 2868233908Sadrian */ 2869233908Sadrian if (tid->bar_wait == 0 || tid->bar_tx == 1) { 2870233908Sadrian device_printf(sc->sc_dev, 2871233908Sadrian "%s: tid=%p, bar_tx=%d, bar_wait=%d: ?\n", 2872233908Sadrian __func__, 2873233908Sadrian tid, 2874233908Sadrian tid->bar_tx, 2875233908Sadrian tid->bar_wait); 2876233908Sadrian return; 2877233908Sadrian } 2878233908Sadrian 2879233908Sadrian /* Don't do anything if we still have pending frames */ 2880233908Sadrian if (tid->hwq_depth > 0) { 2881235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2882233908Sadrian "%s: tid=%p, hwq_depth=%d, waiting\n", 2883233908Sadrian __func__, 2884233908Sadrian tid, 2885233908Sadrian tid->hwq_depth); 2886233908Sadrian return; 2887233908Sadrian } 2888233908Sadrian 2889233908Sadrian /* We're now about to TX */ 2890233908Sadrian tid->bar_tx = 1; 2891233908Sadrian 2892233908Sadrian /* 2893233908Sadrian * Calculate new BAW left edge, now that all frames have either 2894233908Sadrian * succeeded or failed. 2895233908Sadrian * 2896233908Sadrian * XXX verify this is _actually_ the valid value to begin at! 2897233908Sadrian */ 2898235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2899233908Sadrian "%s: tid=%p, new BAW left edge=%d\n", 2900233908Sadrian __func__, 2901233908Sadrian tid, 2902233908Sadrian tap->txa_start); 2903233908Sadrian 2904233908Sadrian /* Try sending the BAR frame */ 2905233908Sadrian /* We can't hold the lock here! */ 2906233908Sadrian 2907233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2908233908Sadrian if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) { 2909233908Sadrian /* Success? Now we wait for notification that it's done */ 2910233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2911233908Sadrian return; 2912233908Sadrian } 2913233908Sadrian 2914233908Sadrian /* Failure? For now, warn loudly and continue */ 2915233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2916233908Sadrian device_printf(sc->sc_dev, "%s: tid=%p, failed to TX BAR, continue!\n", 2917233908Sadrian __func__, tid); 2918233908Sadrian ath_tx_tid_bar_unsuspend(sc, tid); 2919233908Sadrian} 2920233908Sadrian 2921233908Sadrian 2922233908Sadrian/* 2923227364Sadrian * Free any packets currently pending in the software TX queue. 2924227364Sadrian * 2925227364Sadrian * This will be called when a node is being deleted. 2926227364Sadrian * 2927227364Sadrian * It can also be called on an active node during an interface 2928227364Sadrian * reset or state transition. 2929227364Sadrian * 2930227364Sadrian * (From Linux/reference): 2931227364Sadrian * 2932227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2933227364Sadrian * sequence number(s) without setting the retry bit. The 2934227364Sadrian * alternative is to give up on these and BAR the receiver's window 2935227364Sadrian * forward. 2936227364Sadrian */ 2937227364Sadrianstatic void 2938229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 2939229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 2940227364Sadrian{ 2941227364Sadrian struct ath_buf *bf; 2942227364Sadrian struct ieee80211_tx_ampdu *tap; 2943227364Sadrian struct ieee80211_node *ni = &an->an_node; 2944227364Sadrian int t = 0; 2945227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2946227364Sadrian 2947227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2948227364Sadrian 2949227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2950227364Sadrian 2951227364Sadrian /* Walk the queue, free frames */ 2952227364Sadrian for (;;) { 2953227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2954227364Sadrian if (bf == NULL) { 2955227364Sadrian break; 2956227364Sadrian } 2957227364Sadrian 2958227364Sadrian if (t == 0) { 2959227364Sadrian device_printf(sc->sc_dev, 2960233330Sadrian "%s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 2961236872Sadrian "seqno=%d, retry=%d\n", 2962233330Sadrian __func__, ni, bf, 2963233330Sadrian bf->bf_state.bfs_addedbaw, 2964233330Sadrian bf->bf_state.bfs_dobaw, 2965233480Sadrian SEQNO(bf->bf_state.bfs_seqno), 2966233480Sadrian bf->bf_state.bfs_retries); 2967233330Sadrian device_printf(sc->sc_dev, 2968235491Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d\n", 2969233480Sadrian __func__, ni, bf, 2970233480Sadrian tid->axq_depth, 2971235491Sadrian tid->hwq_depth, 2972235491Sadrian tid->bar_wait); 2973233480Sadrian device_printf(sc->sc_dev, 2974236872Sadrian "%s: node %p: tid %d: txq_depth=%d, " 2975227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2976229949Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, " 2977229949Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 2978236872Sadrian __func__, ni, tid->tid, txq->axq_depth, 2979227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2980227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2981227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2982227364Sadrian ni->ni_txseqs[tid->tid]); 2983229165Sadrian 2984229165Sadrian /* XXX Dump the frame, see what it is? */ 2985229165Sadrian ieee80211_dump_pkt(ni->ni_ic, 2986229165Sadrian mtod(bf->bf_m, const uint8_t *), 2987229165Sadrian bf->bf_m->m_len, 0, -1); 2988229165Sadrian 2989233897Sadrian t = 1; 2990227364Sadrian } 2991227364Sadrian 2992227364Sadrian 2993227364Sadrian /* 2994227364Sadrian * If the current TID is running AMPDU, update 2995227364Sadrian * the BAW. 2996227364Sadrian */ 2997227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 2998227364Sadrian bf->bf_state.bfs_dobaw) { 2999227364Sadrian /* 3000227364Sadrian * Only remove the frame from the BAW if it's 3001227364Sadrian * been transmitted at least once; this means 3002227364Sadrian * the frame was in the BAW to begin with. 3003227364Sadrian */ 3004227364Sadrian if (bf->bf_state.bfs_retries > 0) { 3005227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 3006227364Sadrian bf->bf_state.bfs_dobaw = 0; 3007227364Sadrian } 3008227364Sadrian /* 3009227364Sadrian * This has become a non-fatal error now 3010227364Sadrian */ 3011227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3012227364Sadrian device_printf(sc->sc_dev, 3013227364Sadrian "%s: wasn't added: seqno %d\n", 3014227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3015227364Sadrian } 3016227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3017227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 3018227364Sadrian } 3019227364Sadrian 3020227364Sadrian /* 3021227364Sadrian * Now that it's completed, grab the TID lock and update 3022227364Sadrian * the sequence number and BAW window. 3023227364Sadrian * Because sequence numbers have been assigned to frames 3024227364Sadrian * that haven't been sent yet, it's entirely possible 3025227364Sadrian * we'll be called with some pending frames that have not 3026227364Sadrian * been transmitted. 3027227364Sadrian * 3028227364Sadrian * The cleaner solution is to do the sequence number allocation 3029227364Sadrian * when the packet is first transmitted - and thus the "retries" 3030227364Sadrian * check above would be enough to update the BAW/seqno. 3031227364Sadrian */ 3032227364Sadrian 3033227364Sadrian /* But don't do it for non-QoS TIDs */ 3034227364Sadrian if (tap) { 3035227364Sadrian#if 0 3036227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3037227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 3038227364Sadrian __func__, an, tid->tid, tap->txa_start); 3039227364Sadrian#endif 3040227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 3041227364Sadrian tid->baw_tail = tid->baw_head; 3042227364Sadrian } 3043227364Sadrian} 3044227364Sadrian 3045227364Sadrian/* 3046227364Sadrian * Flush all software queued packets for the given node. 3047227364Sadrian * 3048227364Sadrian * This occurs when a completion handler frees the last buffer 3049227364Sadrian * for a node, and the node is thus freed. This causes the node 3050227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 3051227364Sadrian */ 3052227364Sadrianvoid 3053227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 3054227364Sadrian{ 3055227364Sadrian int tid; 3056227364Sadrian ath_bufhead bf_cq; 3057227364Sadrian struct ath_buf *bf; 3058227364Sadrian 3059227364Sadrian TAILQ_INIT(&bf_cq); 3060227364Sadrian 3061227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 3062227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3063227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 3064227364Sadrian 3065227364Sadrian /* Remove this tid from the list of active tids */ 3066227364Sadrian ATH_TXQ_LOCK(txq); 3067227364Sadrian ath_tx_tid_unsched(sc, atid); 3068227364Sadrian 3069227364Sadrian /* Free packets */ 3070227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 3071227364Sadrian ATH_TXQ_UNLOCK(txq); 3072227364Sadrian } 3073227364Sadrian 3074227364Sadrian /* Handle completed frames */ 3075227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3076227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3077227364Sadrian ath_tx_default_comp(sc, bf, 0); 3078227364Sadrian } 3079227364Sadrian} 3080227364Sadrian 3081227364Sadrian/* 3082227364Sadrian * Drain all the software TXQs currently with traffic queued. 3083227364Sadrian */ 3084227364Sadrianvoid 3085227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 3086227364Sadrian{ 3087227364Sadrian struct ath_tid *tid; 3088227364Sadrian ath_bufhead bf_cq; 3089227364Sadrian struct ath_buf *bf; 3090227364Sadrian 3091227364Sadrian TAILQ_INIT(&bf_cq); 3092227364Sadrian ATH_TXQ_LOCK(txq); 3093227364Sadrian 3094227364Sadrian /* 3095227364Sadrian * Iterate over all active tids for the given txq, 3096227364Sadrian * flushing and unsched'ing them 3097227364Sadrian */ 3098227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 3099227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 3100227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 3101227364Sadrian ath_tx_tid_unsched(sc, tid); 3102227364Sadrian } 3103227364Sadrian 3104227364Sadrian ATH_TXQ_UNLOCK(txq); 3105227364Sadrian 3106227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3107227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3108227364Sadrian ath_tx_default_comp(sc, bf, 0); 3109227364Sadrian } 3110227364Sadrian} 3111227364Sadrian 3112227364Sadrian/* 3113227364Sadrian * Handle completion of non-aggregate session frames. 3114227364Sadrian */ 3115227364Sadrianvoid 3116227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3117227364Sadrian{ 3118227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3119227364Sadrian struct ath_node *an = ATH_NODE(ni); 3120227364Sadrian int tid = bf->bf_state.bfs_tid; 3121227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3122227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3123227364Sadrian 3124227364Sadrian /* The TID state is protected behind the TXQ lock */ 3125227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3126227364Sadrian 3127227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 3128227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 3129227364Sadrian 3130227364Sadrian atid->hwq_depth--; 3131227364Sadrian if (atid->hwq_depth < 0) 3132227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3133227364Sadrian __func__, atid->hwq_depth); 3134227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3135227364Sadrian 3136227364Sadrian /* 3137227364Sadrian * punt to rate control if we're not being cleaned up 3138227364Sadrian * during a hw queue drain and the frame wanted an ACK. 3139227364Sadrian */ 3140233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3141227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3142227364Sadrian ts, bf->bf_state.bfs_pktlen, 3143227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3144227364Sadrian 3145227364Sadrian ath_tx_default_comp(sc, bf, fail); 3146227364Sadrian} 3147227364Sadrian 3148227364Sadrian/* 3149227364Sadrian * Handle cleanup of aggregate session packets that aren't 3150227364Sadrian * an A-MPDU. 3151227364Sadrian * 3152227364Sadrian * There's no need to update the BAW here - the session is being 3153227364Sadrian * torn down. 3154227364Sadrian */ 3155227364Sadrianstatic void 3156227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3157227364Sadrian{ 3158227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3159227364Sadrian struct ath_node *an = ATH_NODE(ni); 3160227364Sadrian int tid = bf->bf_state.bfs_tid; 3161227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3162227364Sadrian 3163227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 3164227364Sadrian __func__, tid, atid->incomp); 3165227364Sadrian 3166227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3167227364Sadrian atid->incomp--; 3168227364Sadrian if (atid->incomp == 0) { 3169227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3170227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3171227364Sadrian __func__, tid); 3172227364Sadrian atid->cleanup_inprogress = 0; 3173227364Sadrian ath_tx_tid_resume(sc, atid); 3174227364Sadrian } 3175227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3176227364Sadrian 3177227364Sadrian ath_tx_default_comp(sc, bf, 0); 3178227364Sadrian} 3179227364Sadrian 3180227364Sadrian/* 3181227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 3182227364Sadrian * unaggregated. 3183227364Sadrian * 3184227364Sadrian * - Discard all retry frames from the s/w queue. 3185227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 3186227364Sadrian * - Count the number of unacked frames, and let transmit completion 3187227364Sadrian * handle it later. 3188227364Sadrian * 3189227364Sadrian * The caller is responsible for pausing the TID. 3190227364Sadrian */ 3191227364Sadrianstatic void 3192235749Sadrianath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 3193227364Sadrian{ 3194227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3195227364Sadrian struct ieee80211_tx_ampdu *tap; 3196227364Sadrian struct ath_buf *bf, *bf_next; 3197227364Sadrian ath_bufhead bf_cq; 3198227364Sadrian 3199235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 3200227364Sadrian "%s: TID %d: called\n", __func__, tid); 3201227364Sadrian 3202227364Sadrian TAILQ_INIT(&bf_cq); 3203227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3204227364Sadrian 3205227364Sadrian /* 3206227364Sadrian * Update the frames in the software TX queue: 3207227364Sadrian * 3208227364Sadrian * + Discard retry frames in the queue 3209227364Sadrian * + Fix the completion function to be non-aggregate 3210227364Sadrian */ 3211227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 3212227364Sadrian while (bf) { 3213227364Sadrian if (bf->bf_state.bfs_isretried) { 3214227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 3215227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 3216227364Sadrian atid->axq_depth--; 3217227364Sadrian if (bf->bf_state.bfs_dobaw) { 3218227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3219227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3220227364Sadrian device_printf(sc->sc_dev, 3221227364Sadrian "%s: wasn't added: seqno %d\n", 3222229949Sadrian __func__, 3223229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3224227364Sadrian } 3225227364Sadrian bf->bf_state.bfs_dobaw = 0; 3226227364Sadrian /* 3227227364Sadrian * Call the default completion handler with "fail" just 3228227364Sadrian * so upper levels are suitably notified about this. 3229227364Sadrian */ 3230227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3231227364Sadrian bf = bf_next; 3232227364Sadrian continue; 3233227364Sadrian } 3234227364Sadrian /* Give these the default completion handler */ 3235227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3236227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 3237227364Sadrian } 3238227364Sadrian 3239227364Sadrian /* The caller is required to pause the TID */ 3240227364Sadrian#if 0 3241227364Sadrian /* Pause the TID */ 3242227364Sadrian ath_tx_tid_pause(sc, atid); 3243227364Sadrian#endif 3244227364Sadrian 3245227364Sadrian /* 3246227364Sadrian * Calculate what hardware-queued frames exist based 3247227364Sadrian * on the current BAW size. Ie, what frames have been 3248227364Sadrian * added to the TX hardware queue for this TID but 3249227364Sadrian * not yet ACKed. 3250227364Sadrian */ 3251227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3252227364Sadrian /* Need the lock - fiddling with BAW */ 3253227364Sadrian while (atid->baw_head != atid->baw_tail) { 3254227364Sadrian if (atid->tx_buf[atid->baw_head]) { 3255227364Sadrian atid->incomp++; 3256227364Sadrian atid->cleanup_inprogress = 1; 3257227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 3258227364Sadrian } 3259227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 3260227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 3261227364Sadrian } 3262227364Sadrian 3263227364Sadrian /* 3264227364Sadrian * If cleanup is required, defer TID scheduling 3265227364Sadrian * until all the HW queued packets have been 3266227364Sadrian * sent. 3267227364Sadrian */ 3268227364Sadrian if (! atid->cleanup_inprogress) 3269227364Sadrian ath_tx_tid_resume(sc, atid); 3270227364Sadrian 3271227364Sadrian if (atid->cleanup_inprogress) 3272227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3273227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 3274227364Sadrian __func__, tid, atid->incomp); 3275227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3276227364Sadrian 3277227364Sadrian /* Handle completing frames and fail them */ 3278227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3279227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3280227364Sadrian ath_tx_default_comp(sc, bf, 1); 3281227364Sadrian } 3282227364Sadrian} 3283227364Sadrian 3284227364Sadrianstatic void 3285227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 3286227364Sadrian{ 3287227364Sadrian struct ieee80211_frame *wh; 3288227364Sadrian 3289227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 3290227364Sadrian /* Only update/resync if needed */ 3291227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 3292227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 3293227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3294227364Sadrian BUS_DMASYNC_PREWRITE); 3295227364Sadrian } 3296227364Sadrian sc->sc_stats.ast_tx_swretries++; 3297227364Sadrian bf->bf_state.bfs_isretried = 1; 3298227364Sadrian bf->bf_state.bfs_retries ++; 3299227364Sadrian} 3300227364Sadrian 3301227364Sadrianstatic struct ath_buf * 3302227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3303227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3304227364Sadrian{ 3305227364Sadrian struct ath_buf *nbf; 3306227364Sadrian int error; 3307227364Sadrian 3308227364Sadrian nbf = ath_buf_clone(sc, bf); 3309227364Sadrian 3310227364Sadrian#if 0 3311227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3312227364Sadrian __func__); 3313227364Sadrian#endif 3314227364Sadrian 3315227364Sadrian if (nbf == NULL) { 3316227364Sadrian /* Failed to clone */ 3317227364Sadrian device_printf(sc->sc_dev, 3318227364Sadrian "%s: failed to clone a busy buffer\n", 3319227364Sadrian __func__); 3320227364Sadrian return NULL; 3321227364Sadrian } 3322227364Sadrian 3323227364Sadrian /* Setup the dma for the new buffer */ 3324227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3325227364Sadrian if (error != 0) { 3326227364Sadrian device_printf(sc->sc_dev, 3327227364Sadrian "%s: failed to setup dma for clone\n", 3328227364Sadrian __func__); 3329227364Sadrian /* 3330227364Sadrian * Put this at the head of the list, not tail; 3331227364Sadrian * that way it doesn't interfere with the 3332227364Sadrian * busy buffer logic (which uses the tail of 3333227364Sadrian * the list.) 3334227364Sadrian */ 3335227364Sadrian ATH_TXBUF_LOCK(sc); 3336236994Sadrian ath_returnbuf_head(sc, nbf); 3337227364Sadrian ATH_TXBUF_UNLOCK(sc); 3338227364Sadrian return NULL; 3339227364Sadrian } 3340227364Sadrian 3341227398Sadrian /* Update BAW if required, before we free the original buf */ 3342227398Sadrian if (bf->bf_state.bfs_dobaw) 3343227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3344227398Sadrian 3345227364Sadrian /* Free current buffer; return the older buffer */ 3346227364Sadrian bf->bf_m = NULL; 3347227364Sadrian bf->bf_node = NULL; 3348227364Sadrian ath_freebuf(sc, bf); 3349227364Sadrian return nbf; 3350227364Sadrian} 3351227364Sadrian 3352227364Sadrian/* 3353227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3354227364Sadrian * session. 3355227364Sadrian * 3356227364Sadrian * If too many retries occur, pause the TID, wait for 3357227364Sadrian * any further retransmits (as there's no reason why 3358227364Sadrian * non-aggregate frames in an aggregate session are 3359227364Sadrian * transmitted in-order; they just have to be in-BAW) 3360227364Sadrian * and then queue a BAR. 3361227364Sadrian */ 3362227364Sadrianstatic void 3363227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3364227364Sadrian{ 3365227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3366227364Sadrian struct ath_node *an = ATH_NODE(ni); 3367227364Sadrian int tid = bf->bf_state.bfs_tid; 3368227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3369227364Sadrian struct ieee80211_tx_ampdu *tap; 3370227364Sadrian 3371227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3372227364Sadrian 3373227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3374227364Sadrian 3375227364Sadrian /* 3376227364Sadrian * If the buffer is marked as busy, we can't directly 3377227364Sadrian * reuse it. Instead, try to clone the buffer. 3378227364Sadrian * If the clone is successful, recycle the old buffer. 3379227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3380227364Sadrian * to force the next bit of code to free the buffer 3381227364Sadrian * for us. 3382227364Sadrian */ 3383227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3384227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3385227364Sadrian struct ath_buf *nbf; 3386227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3387227364Sadrian if (nbf) 3388227364Sadrian /* bf has been freed at this point */ 3389227364Sadrian bf = nbf; 3390227364Sadrian else 3391227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3392227364Sadrian } 3393227364Sadrian 3394227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3395227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3396227364Sadrian "%s: exceeded retries; seqno %d\n", 3397227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3398227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3399227364Sadrian 3400227364Sadrian /* Update BAW anyway */ 3401227364Sadrian if (bf->bf_state.bfs_dobaw) { 3402227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3403227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3404227364Sadrian device_printf(sc->sc_dev, 3405227364Sadrian "%s: wasn't added: seqno %d\n", 3406227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3407227364Sadrian } 3408227364Sadrian bf->bf_state.bfs_dobaw = 0; 3409227364Sadrian 3410233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3411233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3412227364Sadrian 3413233908Sadrian /* Send the BAR if there are no other frames waiting */ 3414233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3415233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3416227364Sadrian 3417233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3418227364Sadrian 3419227364Sadrian /* Free buffer, bf is free after this call */ 3420227364Sadrian ath_tx_default_comp(sc, bf, 0); 3421227364Sadrian return; 3422227364Sadrian } 3423227364Sadrian 3424227364Sadrian /* 3425227364Sadrian * This increments the retry counter as well as 3426227364Sadrian * sets the retry flag in the ath_buf and packet 3427227364Sadrian * body. 3428227364Sadrian */ 3429227364Sadrian ath_tx_set_retry(sc, bf); 3430227364Sadrian 3431227364Sadrian /* 3432227364Sadrian * Insert this at the head of the queue, so it's 3433227364Sadrian * retried before any current/subsequent frames. 3434227364Sadrian */ 3435227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3436227364Sadrian ath_tx_tid_sched(sc, atid); 3437233908Sadrian /* Send the BAR if there are no other frames waiting */ 3438233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3439233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3440227364Sadrian 3441227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3442227364Sadrian} 3443227364Sadrian 3444227364Sadrian/* 3445227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3446227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3447227364Sadrian * buffers. 3448227364Sadrian * 3449227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3450227364Sadrian */ 3451227364Sadrianstatic int 3452227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3453227364Sadrian ath_bufhead *bf_q) 3454227364Sadrian{ 3455227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3456227364Sadrian struct ath_node *an = ATH_NODE(ni); 3457227364Sadrian int tid = bf->bf_state.bfs_tid; 3458227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3459227364Sadrian 3460227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 3461227364Sadrian 3462227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3463227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 3464227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 3465227364Sadrian 3466227364Sadrian /* 3467227364Sadrian * If the buffer is marked as busy, we can't directly 3468227364Sadrian * reuse it. Instead, try to clone the buffer. 3469227364Sadrian * If the clone is successful, recycle the old buffer. 3470227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3471227364Sadrian * to force the next bit of code to free the buffer 3472227364Sadrian * for us. 3473227364Sadrian */ 3474227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3475227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3476227364Sadrian struct ath_buf *nbf; 3477227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3478227364Sadrian if (nbf) 3479227364Sadrian /* bf has been freed at this point */ 3480227364Sadrian bf = nbf; 3481227364Sadrian else 3482227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3483227364Sadrian } 3484227364Sadrian 3485227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3486227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3487227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3488227364Sadrian "%s: max retries: seqno %d\n", 3489227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3490227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3491227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3492227364Sadrian device_printf(sc->sc_dev, 3493227364Sadrian "%s: wasn't added: seqno %d\n", 3494227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3495227364Sadrian bf->bf_state.bfs_dobaw = 0; 3496227364Sadrian return 1; 3497227364Sadrian } 3498227364Sadrian 3499227364Sadrian ath_tx_set_retry(sc, bf); 3500227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 3501227364Sadrian 3502227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3503227364Sadrian return 0; 3504227364Sadrian} 3505227364Sadrian 3506227364Sadrian/* 3507227364Sadrian * error pkt completion for an aggregate destination 3508227364Sadrian */ 3509227364Sadrianstatic void 3510227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 3511227364Sadrian struct ath_tid *tid) 3512227364Sadrian{ 3513227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3514227364Sadrian struct ath_node *an = ATH_NODE(ni); 3515227364Sadrian struct ath_buf *bf_next, *bf; 3516227364Sadrian ath_bufhead bf_q; 3517227364Sadrian int drops = 0; 3518227364Sadrian struct ieee80211_tx_ampdu *tap; 3519227364Sadrian ath_bufhead bf_cq; 3520227364Sadrian 3521227364Sadrian TAILQ_INIT(&bf_q); 3522227364Sadrian TAILQ_INIT(&bf_cq); 3523227364Sadrian 3524227364Sadrian /* 3525227364Sadrian * Update rate control - all frames have failed. 3526227364Sadrian * 3527227364Sadrian * XXX use the length in the first frame in the series; 3528227364Sadrian * XXX just so things are consistent for now. 3529227364Sadrian */ 3530227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 3531227364Sadrian &bf_first->bf_status.ds_txstat, 3532227364Sadrian bf_first->bf_state.bfs_pktlen, 3533227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 3534227364Sadrian 3535227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3536227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3537227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 3538227364Sadrian 3539227364Sadrian /* Retry all subframes */ 3540227364Sadrian bf = bf_first; 3541227364Sadrian while (bf) { 3542227364Sadrian bf_next = bf->bf_next; 3543227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3544227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3545227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3546227364Sadrian drops++; 3547227364Sadrian bf->bf_next = NULL; 3548227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3549227364Sadrian } 3550227364Sadrian bf = bf_next; 3551227364Sadrian } 3552227364Sadrian 3553227364Sadrian /* Prepend all frames to the beginning of the queue */ 3554227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3555227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3556227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 3557227364Sadrian } 3558227364Sadrian 3559234725Sadrian /* 3560234725Sadrian * Schedule the TID to be re-tried. 3561234725Sadrian */ 3562227364Sadrian ath_tx_tid_sched(sc, tid); 3563227364Sadrian 3564227364Sadrian /* 3565227364Sadrian * send bar if we dropped any frames 3566227364Sadrian * 3567227364Sadrian * Keep the txq lock held for now, as we need to ensure 3568227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 3569227364Sadrian * in the ifnet TX context or raw TX context.) 3570227364Sadrian */ 3571227364Sadrian if (drops) { 3572233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3573233908Sadrian ath_tx_tid_bar_suspend(sc, tid); 3574227364Sadrian } 3575227364Sadrian 3576233908Sadrian /* 3577233908Sadrian * Send BAR if required 3578233908Sadrian */ 3579233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, tid)) 3580233908Sadrian ath_tx_tid_bar_tx(sc, tid); 3581233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3582233908Sadrian 3583227364Sadrian /* Complete frames which errored out */ 3584227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3585227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3586227364Sadrian ath_tx_default_comp(sc, bf, 0); 3587227364Sadrian } 3588227364Sadrian} 3589227364Sadrian 3590227364Sadrian/* 3591227364Sadrian * Handle clean-up of packets from an aggregate list. 3592227364Sadrian * 3593227364Sadrian * There's no need to update the BAW here - the session is being 3594227364Sadrian * torn down. 3595227364Sadrian */ 3596227364Sadrianstatic void 3597227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3598227364Sadrian{ 3599227364Sadrian struct ath_buf *bf, *bf_next; 3600227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3601227364Sadrian struct ath_node *an = ATH_NODE(ni); 3602227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3603227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3604227364Sadrian 3605227364Sadrian bf = bf_first; 3606227364Sadrian 3607227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3608227364Sadrian 3609227364Sadrian /* update incomp */ 3610227364Sadrian while (bf) { 3611227364Sadrian atid->incomp--; 3612227364Sadrian bf = bf->bf_next; 3613227364Sadrian } 3614227364Sadrian 3615227364Sadrian if (atid->incomp == 0) { 3616227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3617227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3618227364Sadrian __func__, tid); 3619227364Sadrian atid->cleanup_inprogress = 0; 3620227364Sadrian ath_tx_tid_resume(sc, atid); 3621227364Sadrian } 3622233908Sadrian 3623233908Sadrian /* Send BAR if required */ 3624233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3625233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3626227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3627227364Sadrian 3628227364Sadrian /* Handle frame completion */ 3629227364Sadrian while (bf) { 3630227364Sadrian bf_next = bf->bf_next; 3631227364Sadrian ath_tx_default_comp(sc, bf, 1); 3632227364Sadrian bf = bf_next; 3633227364Sadrian } 3634227364Sadrian} 3635227364Sadrian 3636227364Sadrian/* 3637227364Sadrian * Handle completion of an set of aggregate frames. 3638227364Sadrian * 3639227364Sadrian * XXX for now, simply complete each sub-frame. 3640227364Sadrian * 3641227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3642227364Sadrian * not the last descriptor in the first frame. 3643227364Sadrian */ 3644227364Sadrianstatic void 3645229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 3646229949Sadrian int fail) 3647227364Sadrian{ 3648227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3649227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3650227364Sadrian struct ath_node *an = ATH_NODE(ni); 3651227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3652227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3653227364Sadrian struct ath_tx_status ts; 3654227364Sadrian struct ieee80211_tx_ampdu *tap; 3655227364Sadrian ath_bufhead bf_q; 3656227364Sadrian ath_bufhead bf_cq; 3657227364Sadrian int seq_st, tx_ok; 3658227364Sadrian int hasba, isaggr; 3659227364Sadrian uint32_t ba[2]; 3660227364Sadrian struct ath_buf *bf, *bf_next; 3661227364Sadrian int ba_index; 3662227364Sadrian int drops = 0; 3663227364Sadrian int nframes = 0, nbad = 0, nf; 3664227364Sadrian int pktlen; 3665227364Sadrian /* XXX there's too much on the stack? */ 3666236038Sadrian struct ath_rc_series rc[ATH_RC_NUM]; 3667227364Sadrian int txseq; 3668227364Sadrian 3669227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3670227364Sadrian __func__, atid->hwq_depth); 3671227364Sadrian 3672227364Sadrian /* The TID state is kept behind the TXQ lock */ 3673227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3674227364Sadrian 3675227364Sadrian atid->hwq_depth--; 3676227364Sadrian if (atid->hwq_depth < 0) 3677227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3678227364Sadrian __func__, atid->hwq_depth); 3679227364Sadrian 3680227364Sadrian /* 3681227364Sadrian * Punt cleanup to the relevant function, not our problem now 3682227364Sadrian */ 3683227364Sadrian if (atid->cleanup_inprogress) { 3684227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3685227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3686227364Sadrian return; 3687227364Sadrian } 3688227364Sadrian 3689227364Sadrian /* 3690227364Sadrian * Take a copy; this may be needed -after- bf_first 3691227364Sadrian * has been completed and freed. 3692227364Sadrian */ 3693227364Sadrian ts = bf_first->bf_status.ds_txstat; 3694227364Sadrian /* 3695227364Sadrian * XXX for now, use the first frame in the aggregate for 3696227364Sadrian * XXX rate control completion; it's at least consistent. 3697227364Sadrian */ 3698227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3699227364Sadrian 3700227364Sadrian /* 3701235461Sadrian * Handle errors first! 3702235461Sadrian * 3703235461Sadrian * Here, handle _any_ error as a "exceeded retries" error. 3704235461Sadrian * Later on (when filtered frames are to be specially handled) 3705235461Sadrian * it'll have to be expanded. 3706227364Sadrian */ 3707235461Sadrian#if 0 3708227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3709235461Sadrian#endif 3710235461Sadrian if (ts.ts_status != 0) { 3711227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3712227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3713227364Sadrian return; 3714227364Sadrian } 3715227364Sadrian 3716227364Sadrian TAILQ_INIT(&bf_q); 3717227364Sadrian TAILQ_INIT(&bf_cq); 3718227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3719227364Sadrian 3720227364Sadrian /* 3721227364Sadrian * extract starting sequence and block-ack bitmap 3722227364Sadrian */ 3723227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3724227364Sadrian seq_st = ts.ts_seqnum; 3725227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3726227364Sadrian tx_ok = (ts.ts_status == 0); 3727227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3728227364Sadrian ba[0] = ts.ts_ba_low; 3729227364Sadrian ba[1] = ts.ts_ba_high; 3730227364Sadrian 3731227364Sadrian /* 3732227364Sadrian * Copy the TX completion status and the rate control 3733227364Sadrian * series from the first descriptor, as it may be freed 3734227364Sadrian * before the rate control code can get its grubby fingers 3735227364Sadrian * into things. 3736227364Sadrian */ 3737227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3738227364Sadrian 3739227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3740229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 3741229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3742227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3743227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3744227364Sadrian 3745227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3746227364Sadrian if (tid != ts.ts_tid) { 3747227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3748227364Sadrian __func__, tid, ts.ts_tid); 3749227364Sadrian tx_ok = 0; 3750227364Sadrian } 3751227364Sadrian 3752227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3753227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3754227364Sadrian device_printf(sc->sc_dev, 3755229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 3756229949Sadrian "seq_st=%d\n", 3757227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3758227364Sadrian /* XXX TODO: schedule an interface reset */ 3759238350Sjhb#ifdef ATH_DEBUG 3760238338Sadrian ath_printtxbuf(sc, bf_first, 3761238338Sadrian sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0); 3762238350Sjhb#endif 3763227364Sadrian } 3764227364Sadrian 3765227364Sadrian /* 3766227364Sadrian * Walk the list of frames, figure out which ones were correctly 3767227364Sadrian * sent and which weren't. 3768227364Sadrian */ 3769227364Sadrian bf = bf_first; 3770227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3771227364Sadrian 3772227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3773227364Sadrian bf_first = NULL; 3774227364Sadrian 3775227364Sadrian /* 3776227364Sadrian * Walk the list of completed frames and determine 3777227364Sadrian * which need to be completed and which need to be 3778227364Sadrian * retransmitted. 3779227364Sadrian * 3780227364Sadrian * For completed frames, the completion functions need 3781227364Sadrian * to be called at the end of this function as the last 3782227364Sadrian * node reference may free the node. 3783227364Sadrian * 3784227364Sadrian * Finally, since the TXQ lock can't be held during the 3785227364Sadrian * completion callback (to avoid lock recursion), 3786227364Sadrian * the completion calls have to be done outside of the 3787227364Sadrian * lock. 3788227364Sadrian */ 3789227364Sadrian while (bf) { 3790227364Sadrian nframes++; 3791229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 3792229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3793227364Sadrian bf_next = bf->bf_next; 3794227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3795227364Sadrian 3796227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3797227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3798227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3799227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3800227364Sadrian 3801227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3802227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 3803227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3804227364Sadrian bf->bf_state.bfs_dobaw = 0; 3805227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3806227364Sadrian device_printf(sc->sc_dev, 3807227364Sadrian "%s: wasn't added: seqno %d\n", 3808227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3809227364Sadrian bf->bf_next = NULL; 3810227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3811227364Sadrian } else { 3812227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3813227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3814227364Sadrian drops++; 3815227364Sadrian bf->bf_next = NULL; 3816227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3817227364Sadrian } 3818227364Sadrian nbad++; 3819227364Sadrian } 3820227364Sadrian bf = bf_next; 3821227364Sadrian } 3822227364Sadrian 3823227364Sadrian /* 3824227364Sadrian * Now that the BAW updates have been done, unlock 3825227364Sadrian * 3826227364Sadrian * txseq is grabbed before the lock is released so we 3827227364Sadrian * have a consistent view of what -was- in the BAW. 3828227364Sadrian * Anything after this point will not yet have been 3829227364Sadrian * TXed. 3830227364Sadrian */ 3831227364Sadrian txseq = tap->txa_start; 3832227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3833227364Sadrian 3834227364Sadrian if (nframes != nf) 3835227364Sadrian device_printf(sc->sc_dev, 3836227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3837227364Sadrian __func__, nframes, nf); 3838227364Sadrian 3839227364Sadrian /* 3840227364Sadrian * Now we know how many frames were bad, call the rate 3841227364Sadrian * control code. 3842227364Sadrian */ 3843227364Sadrian if (fail == 0) 3844229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 3845229949Sadrian nbad); 3846227364Sadrian 3847227364Sadrian /* 3848227364Sadrian * send bar if we dropped any frames 3849227364Sadrian */ 3850227364Sadrian if (drops) { 3851233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3852233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3853233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3854233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3855227364Sadrian } 3856227364Sadrian 3857234725Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3858234725Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3859234725Sadrian 3860234725Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3861234725Sadrian 3862227364Sadrian /* Prepend all frames to the beginning of the queue */ 3863227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3864227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3865227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3866227364Sadrian } 3867234725Sadrian 3868234725Sadrian /* 3869234725Sadrian * Reschedule to grab some further frames. 3870234725Sadrian */ 3871227364Sadrian ath_tx_tid_sched(sc, atid); 3872227364Sadrian 3873233908Sadrian /* 3874233908Sadrian * Send BAR if required 3875233908Sadrian */ 3876233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3877233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3878234725Sadrian 3879233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3880233908Sadrian 3881227364Sadrian /* Do deferred completion */ 3882227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3883227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3884227364Sadrian ath_tx_default_comp(sc, bf, 0); 3885227364Sadrian } 3886227364Sadrian} 3887227364Sadrian 3888227364Sadrian/* 3889227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3890227364Sadrian * session. 3891227364Sadrian * 3892227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3893227364Sadrian * ath_tx_draintxq(). 3894227364Sadrian */ 3895227364Sadrianstatic void 3896227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3897227364Sadrian{ 3898227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3899227364Sadrian struct ath_node *an = ATH_NODE(ni); 3900227364Sadrian int tid = bf->bf_state.bfs_tid; 3901227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3902227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3903227364Sadrian 3904227364Sadrian /* 3905227364Sadrian * Update rate control status here, before we possibly 3906227364Sadrian * punt to retry or cleanup. 3907227364Sadrian * 3908227364Sadrian * Do it outside of the TXQ lock. 3909227364Sadrian */ 3910233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3911227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3912227364Sadrian &bf->bf_status.ds_txstat, 3913227364Sadrian bf->bf_state.bfs_pktlen, 3914227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3915227364Sadrian 3916227364Sadrian /* 3917227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3918227364Sadrian * This unfortunately means that it's released and regrabbed 3919227364Sadrian * during retry and cleanup. That's rather inefficient. 3920227364Sadrian */ 3921227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3922227364Sadrian 3923227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3924227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3925227364Sadrian 3926229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 3927229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 3928229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 3929229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3930227364Sadrian 3931227364Sadrian atid->hwq_depth--; 3932227364Sadrian if (atid->hwq_depth < 0) 3933227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3934227364Sadrian __func__, atid->hwq_depth); 3935227364Sadrian 3936227364Sadrian /* 3937227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3938227364Sadrian * rather than handling it here. It's thus their 3939227364Sadrian * responsibility to clean up, call the completion 3940227364Sadrian * function in net80211, etc. 3941227364Sadrian */ 3942227364Sadrian if (atid->cleanup_inprogress) { 3943227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3944229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 3945229949Sadrian __func__); 3946227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3947227364Sadrian return; 3948227364Sadrian } 3949227364Sadrian 3950227364Sadrian /* 3951227364Sadrian * Don't bother with the retry check if all frames 3952227364Sadrian * are being failed (eg during queue deletion.) 3953227364Sadrian */ 3954235461Sadrian#if 0 3955227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3956235461Sadrian#endif 3957235461Sadrian if (fail == 0 && ts->ts_status != 0) { 3958227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3959229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 3960229949Sadrian __func__); 3961227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3962227364Sadrian return; 3963227364Sadrian } 3964227364Sadrian 3965227364Sadrian /* Success? Complete */ 3966227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3967227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3968227364Sadrian if (bf->bf_state.bfs_dobaw) { 3969227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3970227364Sadrian bf->bf_state.bfs_dobaw = 0; 3971227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3972227364Sadrian device_printf(sc->sc_dev, 3973227364Sadrian "%s: wasn't added: seqno %d\n", 3974227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3975227364Sadrian } 3976227364Sadrian 3977233908Sadrian /* 3978233908Sadrian * Send BAR if required 3979233908Sadrian */ 3980233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3981233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3982233908Sadrian 3983227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3984227364Sadrian 3985227364Sadrian ath_tx_default_comp(sc, bf, fail); 3986227364Sadrian /* bf is freed at this point */ 3987227364Sadrian} 3988227364Sadrian 3989227364Sadrianvoid 3990227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3991227364Sadrian{ 3992227364Sadrian if (bf->bf_state.bfs_aggr) 3993227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 3994227364Sadrian else 3995227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 3996227364Sadrian} 3997227364Sadrian 3998227364Sadrian/* 3999227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4000227364Sadrian * 4001227364Sadrian * This is the aggregate version. 4002227364Sadrian */ 4003227364Sadrianvoid 4004227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 4005227364Sadrian struct ath_tid *tid) 4006227364Sadrian{ 4007227364Sadrian struct ath_buf *bf; 4008227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4009227364Sadrian struct ieee80211_tx_ampdu *tap; 4010227364Sadrian ATH_AGGR_STATUS status; 4011227364Sadrian ath_bufhead bf_q; 4012227364Sadrian 4013227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 4014227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4015227364Sadrian 4016227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 4017227364Sadrian 4018227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 4019227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 4020227364Sadrian __func__); 4021227364Sadrian 4022227364Sadrian for (;;) { 4023227364Sadrian status = ATH_AGGR_DONE; 4024227364Sadrian 4025227364Sadrian /* 4026227364Sadrian * If the upper layer has paused the TID, don't 4027227364Sadrian * queue any further packets. 4028227364Sadrian * 4029227364Sadrian * This can also occur from the completion task because 4030227364Sadrian * of packet loss; but as its serialised with this code, 4031227364Sadrian * it won't "appear" half way through queuing packets. 4032227364Sadrian */ 4033227364Sadrian if (tid->paused) 4034227364Sadrian break; 4035227364Sadrian 4036227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 4037227364Sadrian if (bf == NULL) { 4038227364Sadrian break; 4039227364Sadrian } 4040227364Sadrian 4041227364Sadrian /* 4042227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 4043227364Sadrian * data frame), schedule it directly; continue. 4044227364Sadrian */ 4045227364Sadrian if (! bf->bf_state.bfs_dobaw) { 4046229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4047229949Sadrian "%s: non-baw packet\n", 4048227364Sadrian __func__); 4049227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 4050240180Sadrian 4051240180Sadrian if (bf->bf_state.bfs_nframes > 1) 4052240180Sadrian device_printf(sc->sc_dev, 4053240180Sadrian "%s: aggr=%d, nframes=%d\n", 4054240180Sadrian __func__, 4055240180Sadrian bf->bf_state.bfs_aggr, 4056240180Sadrian bf->bf_state.bfs_nframes); 4057240180Sadrian 4058240180Sadrian /* 4059240180Sadrian * This shouldn't happen - such frames shouldn't 4060240180Sadrian * ever have been queued as an aggregate in the 4061240180Sadrian * first place. However, make sure the fields 4062240180Sadrian * are correctly setup just to be totally sure. 4063240180Sadrian */ 4064227364Sadrian bf->bf_state.bfs_aggr = 0; 4065240180Sadrian bf->bf_state.bfs_nframes = 1; 4066240180Sadrian 4067227364Sadrian ath_tx_do_ratelookup(sc, bf); 4068233989Sadrian ath_tx_calc_duration(sc, bf); 4069233989Sadrian ath_tx_calc_protection(sc, bf); 4070233989Sadrian ath_tx_set_rtscts(sc, bf); 4071227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4072227364Sadrian ath_tx_setds(sc, bf); 4073227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4074227364Sadrian 4075227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 4076227364Sadrian 4077227364Sadrian /* Queue the packet; continue */ 4078227364Sadrian goto queuepkt; 4079227364Sadrian } 4080227364Sadrian 4081227364Sadrian TAILQ_INIT(&bf_q); 4082227364Sadrian 4083227364Sadrian /* 4084227364Sadrian * Do a rate control lookup on the first frame in the 4085227364Sadrian * list. The rate control code needs that to occur 4086227364Sadrian * before it can determine whether to TX. 4087227364Sadrian * It's inaccurate because the rate control code doesn't 4088227364Sadrian * really "do" aggregate lookups, so it only considers 4089227364Sadrian * the size of the first frame. 4090227364Sadrian */ 4091227364Sadrian ath_tx_do_ratelookup(sc, bf); 4092227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 4093227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 4094233989Sadrian 4095233989Sadrian ath_tx_calc_duration(sc, bf); 4096233989Sadrian ath_tx_calc_protection(sc, bf); 4097233989Sadrian 4098233989Sadrian ath_tx_set_rtscts(sc, bf); 4099227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4100227364Sadrian 4101227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 4102227364Sadrian 4103227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4104227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 4105227364Sadrian 4106227364Sadrian /* 4107227364Sadrian * No frames to be picked up - out of BAW 4108227364Sadrian */ 4109227364Sadrian if (TAILQ_EMPTY(&bf_q)) 4110227364Sadrian break; 4111227364Sadrian 4112227364Sadrian /* 4113227364Sadrian * This assumes that the descriptor list in the ath_bufhead 4114227364Sadrian * are already linked together via bf_next pointers. 4115227364Sadrian */ 4116227364Sadrian bf = TAILQ_FIRST(&bf_q); 4117227364Sadrian 4118233989Sadrian if (status == ATH_AGGR_8K_LIMITED) 4119233989Sadrian sc->sc_aggr_stats.aggr_rts_aggr_limited++; 4120233989Sadrian 4121227364Sadrian /* 4122227364Sadrian * If it's the only frame send as non-aggregate 4123227364Sadrian * assume that ath_tx_form_aggr() has checked 4124227364Sadrian * whether it's in the BAW and added it appropriately. 4125227364Sadrian */ 4126227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 4127227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4128227364Sadrian "%s: single-frame aggregate\n", __func__); 4129227364Sadrian bf->bf_state.bfs_aggr = 0; 4130227364Sadrian ath_tx_setds(sc, bf); 4131227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4132227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 4133227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 4134227364Sadrian else 4135227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 4136227364Sadrian } else { 4137227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4138229949Sadrian "%s: multi-frame aggregate: %d frames, " 4139229949Sadrian "length %d\n", 4140227364Sadrian __func__, bf->bf_state.bfs_nframes, 4141227364Sadrian bf->bf_state.bfs_al); 4142227364Sadrian bf->bf_state.bfs_aggr = 1; 4143227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 4144227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 4145227364Sadrian 4146227364Sadrian /* 4147233989Sadrian * Calculate the duration/protection as required. 4148233989Sadrian */ 4149233989Sadrian ath_tx_calc_duration(sc, bf); 4150233989Sadrian ath_tx_calc_protection(sc, bf); 4151233989Sadrian 4152233989Sadrian /* 4153227364Sadrian * Update the rate and rtscts information based on the 4154227364Sadrian * rate decision made by the rate control code; 4155227364Sadrian * the first frame in the aggregate needs it. 4156227364Sadrian */ 4157227364Sadrian ath_tx_set_rtscts(sc, bf); 4158227364Sadrian 4159227364Sadrian /* 4160227364Sadrian * Setup the relevant descriptor fields 4161227364Sadrian * for aggregation. The first descriptor 4162227364Sadrian * already points to the rest in the chain. 4163227364Sadrian */ 4164227364Sadrian ath_tx_setds_11n(sc, bf); 4165227364Sadrian 4166227364Sadrian } 4167227364Sadrian queuepkt: 4168227364Sadrian //txq = bf->bf_state.bfs_txq; 4169227364Sadrian 4170227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 4171227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 4172227364Sadrian 4173227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 4174227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 4175227364Sadrian 4176227364Sadrian /* Punt to txq */ 4177227364Sadrian ath_tx_handoff(sc, txq, bf); 4178227364Sadrian 4179227364Sadrian /* Track outstanding buffer count to hardware */ 4180227364Sadrian /* aggregates are "one" buffer */ 4181227364Sadrian tid->hwq_depth++; 4182227364Sadrian 4183227364Sadrian /* 4184227364Sadrian * Break out if ath_tx_form_aggr() indicated 4185227364Sadrian * there can't be any further progress (eg BAW is full.) 4186227364Sadrian * Checking for an empty txq is done above. 4187227364Sadrian * 4188227364Sadrian * XXX locking on txq here? 4189227364Sadrian */ 4190227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 4191227364Sadrian status == ATH_AGGR_BAW_CLOSED) 4192227364Sadrian break; 4193227364Sadrian } 4194227364Sadrian} 4195227364Sadrian 4196227364Sadrian/* 4197227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4198227364Sadrian */ 4199227364Sadrianvoid 4200227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 4201227364Sadrian struct ath_tid *tid) 4202227364Sadrian{ 4203227364Sadrian struct ath_buf *bf; 4204227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4205227364Sadrian 4206227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 4207227364Sadrian __func__, an, tid->tid); 4208227364Sadrian 4209227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4210227364Sadrian 4211227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 4212227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 4213227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 4214227364Sadrian __func__, tid->tid); 4215227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 4216227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 4217227364Sadrian __func__, tid->tid); 4218227364Sadrian 4219227364Sadrian for (;;) { 4220227364Sadrian 4221227364Sadrian /* 4222227364Sadrian * If the upper layers have paused the TID, don't 4223227364Sadrian * queue any further packets. 4224227364Sadrian */ 4225227364Sadrian if (tid->paused) 4226227364Sadrian break; 4227227364Sadrian 4228227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 4229227364Sadrian if (bf == NULL) { 4230227364Sadrian break; 4231227364Sadrian } 4232227364Sadrian 4233227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 4234227364Sadrian 4235227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 4236227364Sadrian 4237227364Sadrian /* Sanity check! */ 4238227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 4239227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 4240227364Sadrian " tid %d\n", 4241227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 4242227364Sadrian } 4243227364Sadrian /* Normal completion handler */ 4244227364Sadrian bf->bf_comp = ath_tx_normal_comp; 4245227364Sadrian 4246227364Sadrian /* Program descriptors + rate control */ 4247227364Sadrian ath_tx_do_ratelookup(sc, bf); 4248233989Sadrian ath_tx_calc_duration(sc, bf); 4249233989Sadrian ath_tx_calc_protection(sc, bf); 4250233989Sadrian ath_tx_set_rtscts(sc, bf); 4251227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4252227364Sadrian ath_tx_setds(sc, bf); 4253227364Sadrian 4254227364Sadrian /* Track outstanding buffer count to hardware */ 4255227364Sadrian /* aggregates are "one" buffer */ 4256227364Sadrian tid->hwq_depth++; 4257227364Sadrian 4258227364Sadrian /* Punt to hardware or software txq */ 4259227364Sadrian ath_tx_handoff(sc, txq, bf); 4260227364Sadrian } 4261227364Sadrian} 4262227364Sadrian 4263227364Sadrian/* 4264227364Sadrian * Schedule some packets to the given hardware queue. 4265227364Sadrian * 4266227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 4267227364Sadrian * with queued traffic) and attempts to schedule traffic 4268227364Sadrian * from them. 4269227364Sadrian * 4270227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 4271227364Sadrian * added to the end of the queue after some frames have been 4272227364Sadrian * scheduled. 4273227364Sadrian */ 4274227364Sadrianvoid 4275227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 4276227364Sadrian{ 4277227364Sadrian struct ath_tid *tid, *next, *last; 4278227364Sadrian 4279227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4280227364Sadrian 4281227364Sadrian /* 4282227364Sadrian * Don't schedule if the hardware queue is busy. 4283227364Sadrian * This (hopefully) gives some more time to aggregate 4284227364Sadrian * some packets in the aggregation queue. 4285227364Sadrian */ 4286227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4287227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 4288227364Sadrian return; 4289227364Sadrian } 4290227364Sadrian 4291227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 4292227364Sadrian 4293227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 4294227364Sadrian /* 4295227364Sadrian * Suspend paused queues here; they'll be resumed 4296227364Sadrian * once the addba completes or times out. 4297227364Sadrian */ 4298227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 4299227364Sadrian __func__, tid->tid, tid->paused); 4300227364Sadrian ath_tx_tid_unsched(sc, tid); 4301227364Sadrian if (tid->paused) { 4302227364Sadrian continue; 4303227364Sadrian } 4304227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 4305227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 4306227364Sadrian else 4307227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 4308227364Sadrian 4309227364Sadrian /* Not empty? Re-schedule */ 4310227364Sadrian if (tid->axq_depth != 0) 4311227364Sadrian ath_tx_tid_sched(sc, tid); 4312227364Sadrian 4313227364Sadrian /* Give the software queue time to aggregate more packets */ 4314227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4315227364Sadrian break; 4316227364Sadrian } 4317227364Sadrian 4318227364Sadrian /* 4319227364Sadrian * If this was the last entry on the original list, stop. 4320227364Sadrian * Otherwise nodes that have been rescheduled onto the end 4321227364Sadrian * of the TID FIFO list will just keep being rescheduled. 4322227364Sadrian */ 4323227364Sadrian if (tid == last) 4324227364Sadrian break; 4325227364Sadrian } 4326227364Sadrian} 4327227364Sadrian 4328227364Sadrian/* 4329227364Sadrian * TX addba handling 4330227364Sadrian */ 4331227364Sadrian 4332227364Sadrian/* 4333227364Sadrian * Return net80211 TID struct pointer, or NULL for none 4334227364Sadrian */ 4335227364Sadrianstruct ieee80211_tx_ampdu * 4336227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 4337227364Sadrian{ 4338227364Sadrian struct ieee80211_node *ni = &an->an_node; 4339227364Sadrian struct ieee80211_tx_ampdu *tap; 4340227364Sadrian 4341227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4342227364Sadrian return NULL; 4343227364Sadrian 4344234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 4345227364Sadrian return tap; 4346227364Sadrian} 4347227364Sadrian 4348227364Sadrian/* 4349227364Sadrian * Is AMPDU-TX running? 4350227364Sadrian */ 4351227364Sadrianstatic int 4352227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 4353227364Sadrian{ 4354227364Sadrian struct ieee80211_tx_ampdu *tap; 4355227364Sadrian 4356227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4357227364Sadrian return 0; 4358227364Sadrian 4359227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4360227364Sadrian if (tap == NULL) 4361227364Sadrian return 0; /* Not valid; default to not running */ 4362227364Sadrian 4363227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 4364227364Sadrian} 4365227364Sadrian 4366227364Sadrian/* 4367227364Sadrian * Is AMPDU-TX negotiation pending? 4368227364Sadrian */ 4369227364Sadrianstatic int 4370227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 4371227364Sadrian{ 4372227364Sadrian struct ieee80211_tx_ampdu *tap; 4373227364Sadrian 4374227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4375227364Sadrian return 0; 4376227364Sadrian 4377227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4378227364Sadrian if (tap == NULL) 4379227364Sadrian return 0; /* Not valid; default to not pending */ 4380227364Sadrian 4381227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 4382227364Sadrian} 4383227364Sadrian 4384227364Sadrian/* 4385227364Sadrian * Is AMPDU-TX pending for the given TID? 4386227364Sadrian */ 4387227364Sadrian 4388227364Sadrian 4389227364Sadrian/* 4390227364Sadrian * Method to handle sending an ADDBA request. 4391227364Sadrian * 4392227364Sadrian * We tap this so the relevant flags can be set to pause the TID 4393227364Sadrian * whilst waiting for the response. 4394227364Sadrian * 4395227364Sadrian * XXX there's no timeout handler we can override? 4396227364Sadrian */ 4397227364Sadrianint 4398227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4399227364Sadrian int dialogtoken, int baparamset, int batimeout) 4400227364Sadrian{ 4401227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4402234324Sadrian int tid = tap->txa_tid; 4403227364Sadrian struct ath_node *an = ATH_NODE(ni); 4404227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4405227364Sadrian 4406227364Sadrian /* 4407227364Sadrian * XXX danger Will Robinson! 4408227364Sadrian * 4409227364Sadrian * Although the taskqueue may be running and scheduling some more 4410227364Sadrian * packets, these should all be _before_ the addba sequence number. 4411227364Sadrian * However, net80211 will keep self-assigning sequence numbers 4412227364Sadrian * until addba has been negotiated. 4413227364Sadrian * 4414227364Sadrian * In the past, these packets would be "paused" (which still works 4415227364Sadrian * fine, as they're being scheduled to the driver in the same 4416227364Sadrian * serialised method which is calling the addba request routine) 4417227364Sadrian * and when the aggregation session begins, they'll be dequeued 4418227364Sadrian * as aggregate packets and added to the BAW. However, now there's 4419227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 4420227364Sadrian * packets. Thus they never get included in the BAW tracking and 4421227364Sadrian * this can cause the initial burst of packets after the addba 4422227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 4423227364Sadrian * 4424227364Sadrian * The "eventual" solution should be to tag these packets with 4425227364Sadrian * dobaw. Although net80211 has given us a sequence number, 4426227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 4427227364Sadrian * fall within it. 4428227364Sadrian */ 4429235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4430235774Sadrian /* 4431235774Sadrian * This is a bit annoying. Until net80211 HT code inherits some 4432235774Sadrian * (any) locking, we may have this called in parallel BUT only 4433235774Sadrian * one response/timeout will be called. Grr. 4434235774Sadrian */ 4435235774Sadrian if (atid->addba_tx_pending == 0) { 4436235774Sadrian ath_tx_tid_pause(sc, atid); 4437235774Sadrian atid->addba_tx_pending = 1; 4438235774Sadrian } 4439235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4440227364Sadrian 4441227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4442227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 4443227364Sadrian __func__, dialogtoken, baparamset, batimeout); 4444227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4445227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4446227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4447227364Sadrian 4448227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 4449227364Sadrian batimeout); 4450227364Sadrian} 4451227364Sadrian 4452227364Sadrian/* 4453227364Sadrian * Handle an ADDBA response. 4454227364Sadrian * 4455227364Sadrian * We unpause the queue so TX'ing can resume. 4456227364Sadrian * 4457227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 4458227364Sadrian * aggregate or not) so the BAW is updated. 4459227364Sadrian * 4460227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 4461227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 4462227364Sadrian * edge won't match the ni->ni_txseq. 4463227364Sadrian * 4464227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 4465227364Sadrian * ni->ni_txseq. 4466227364Sadrian * 4467227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 4468227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 4469227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 4470227364Sadrian * window. 4471227364Sadrian */ 4472227364Sadrianint 4473227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4474227364Sadrian int status, int code, int batimeout) 4475227364Sadrian{ 4476227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4477234324Sadrian int tid = tap->txa_tid; 4478227364Sadrian struct ath_node *an = ATH_NODE(ni); 4479227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4480227364Sadrian int r; 4481227364Sadrian 4482227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4483227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 4484227364Sadrian status, code, batimeout); 4485227364Sadrian 4486227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4487227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4488227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4489227364Sadrian 4490227364Sadrian /* 4491227364Sadrian * Call this first, so the interface flags get updated 4492227364Sadrian * before the TID is unpaused. Otherwise a race condition 4493227364Sadrian * exists where the unpaused TID still doesn't yet have 4494227364Sadrian * IEEE80211_AGGR_RUNNING set. 4495227364Sadrian */ 4496227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 4497227364Sadrian 4498227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4499235774Sadrian atid->addba_tx_pending = 0; 4500227364Sadrian /* 4501227364Sadrian * XXX dirty! 4502227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 4503227364Sadrian * Read above for more information. 4504227364Sadrian */ 4505227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 4506227364Sadrian ath_tx_tid_resume(sc, atid); 4507227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4508227364Sadrian return r; 4509227364Sadrian} 4510227364Sadrian 4511227364Sadrian 4512227364Sadrian/* 4513227364Sadrian * Stop ADDBA on a queue. 4514237593Sadrian * 4515237593Sadrian * This can be called whilst BAR TX is currently active on the queue, 4516237593Sadrian * so make sure this is unblocked before continuing. 4517227364Sadrian */ 4518227364Sadrianvoid 4519227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 4520227364Sadrian{ 4521227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4522234324Sadrian int tid = tap->txa_tid; 4523227364Sadrian struct ath_node *an = ATH_NODE(ni); 4524227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4525227364Sadrian 4526227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 4527227364Sadrian 4528237593Sadrian /* 4529237593Sadrian * Pause TID traffic early, so there aren't any races 4530237593Sadrian * Unblock the pending BAR held traffic, if it's currently paused. 4531237593Sadrian */ 4532235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4533227364Sadrian ath_tx_tid_pause(sc, atid); 4534237593Sadrian if (atid->bar_wait) { 4535237593Sadrian /* 4536237593Sadrian * bar_unsuspend() expects bar_tx == 1, as it should be 4537237593Sadrian * called from the TX completion path. This quietens 4538237593Sadrian * the warning. It's cleared for us anyway. 4539237593Sadrian */ 4540237593Sadrian atid->bar_tx = 1; 4541237593Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4542237593Sadrian } 4543235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4544227364Sadrian 4545227364Sadrian /* There's no need to hold the TXQ lock here */ 4546227364Sadrian sc->sc_addba_stop(ni, tap); 4547227364Sadrian 4548227364Sadrian /* 4549235749Sadrian * ath_tx_tid_cleanup will resume the TID if possible, otherwise 4550227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 4551227364Sadrian * things have been cleaned up. 4552227364Sadrian */ 4553235749Sadrian ath_tx_tid_cleanup(sc, an, tid); 4554227364Sadrian} 4555227364Sadrian 4556227364Sadrian/* 4557227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 4558227364Sadrian * it simply tears down the aggregation session. Ew. 4559227364Sadrian * 4560227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 4561227364Sadrian * ic->ic_addba_stop(). 4562227364Sadrian * 4563227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 4564227364Sadrian * XXX BAR TX success or failure should be better handled! 4565227364Sadrian */ 4566227364Sadrianvoid 4567227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4568227364Sadrian int status) 4569227364Sadrian{ 4570227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4571234324Sadrian int tid = tap->txa_tid; 4572227364Sadrian struct ath_node *an = ATH_NODE(ni); 4573227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4574227364Sadrian int attempts = tap->txa_attempts; 4575227364Sadrian 4576235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 4577235676Sadrian "%s: called; tap=%p, atid=%p, txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n", 4578235491Sadrian __func__, 4579235676Sadrian tap, 4580235676Sadrian atid, 4581235676Sadrian tap->txa_tid, 4582235676Sadrian atid->tid, 4583235491Sadrian status, 4584235491Sadrian attempts); 4585227364Sadrian 4586227364Sadrian /* Note: This may update the BAW details */ 4587227364Sadrian sc->sc_bar_response(ni, tap, status); 4588227364Sadrian 4589227364Sadrian /* Unpause the TID */ 4590227364Sadrian /* 4591227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 4592227364Sadrian * XXX to a non-aggregate session. So we must unpause the 4593227364Sadrian * XXX TID here or it'll never be done. 4594227364Sadrian */ 4595227364Sadrian if (status == 0 || attempts == 50) { 4596227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4597233908Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4598227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4599227364Sadrian } 4600227364Sadrian} 4601227364Sadrian 4602227364Sadrian/* 4603227364Sadrian * This is called whenever the pending ADDBA request times out. 4604227364Sadrian * Unpause and reschedule the TID. 4605227364Sadrian */ 4606227364Sadrianvoid 4607227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 4608227364Sadrian struct ieee80211_tx_ampdu *tap) 4609227364Sadrian{ 4610227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4611234324Sadrian int tid = tap->txa_tid; 4612227364Sadrian struct ath_node *an = ATH_NODE(ni); 4613227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4614227364Sadrian 4615227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4616227364Sadrian "%s: called; resuming\n", __func__); 4617227364Sadrian 4618235774Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4619235774Sadrian atid->addba_tx_pending = 0; 4620235774Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4621235774Sadrian 4622227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 4623227364Sadrian sc->sc_addba_response_timeout(ni, tap); 4624227364Sadrian 4625227364Sadrian /* Unpause the TID; which reschedules it */ 4626227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4627227364Sadrian ath_tx_tid_resume(sc, atid); 4628227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4629227364Sadrian} 4630238710Sadrian 4631238710Sadrianstatic int 4632238710Sadrianath_legacy_dma_txsetup(struct ath_softc *sc) 4633238710Sadrian{ 4634238710Sadrian 4635238710Sadrian /* nothing new needed */ 4636238710Sadrian return (0); 4637238710Sadrian} 4638238710Sadrian 4639238710Sadrianstatic int 4640238710Sadrianath_legacy_dma_txteardown(struct ath_softc *sc) 4641238710Sadrian{ 4642238710Sadrian 4643238710Sadrian /* nothing new needed */ 4644238710Sadrian return (0); 4645238710Sadrian} 4646238710Sadrian 4647238710Sadrianvoid 4648238710Sadrianath_xmit_setup_legacy(struct ath_softc *sc) 4649238710Sadrian{ 4650238729Sadrian /* 4651238729Sadrian * For now, just set the descriptor length to sizeof(ath_desc); 4652238729Sadrian * worry about extracting the real length out of the HAL later. 4653238729Sadrian */ 4654238729Sadrian sc->sc_tx_desclen = sizeof(struct ath_desc); 4655238729Sadrian sc->sc_tx_statuslen = 0; 4656238729Sadrian sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */ 4657238710Sadrian 4658238710Sadrian sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup; 4659238710Sadrian sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown; 4660238931Sadrian sc->sc_tx.xmit_attach_comp_func = ath_legacy_attach_comp_func; 4661238930Sadrian 4662238930Sadrian sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart; 4663238930Sadrian sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff; 4664239204Sadrian 4665239204Sadrian sc->sc_tx.xmit_drain = ath_legacy_tx_drain; 4666238710Sadrian} 4667