if_ath_tx.c revision 240255
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 240255 2012-09-09 05:06:16Z 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 ); 380240255Sadrian 381240255Sadrian /* Make sure the 11n aggregate fields are cleared */ 382240255Sadrian if (ath_tx_is_11n(sc)) 383240255Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 384240255Sadrian 385239380Sadrian isFirstDesc = 0; 386239438Sadrian#ifdef ATH_DEBUG 387239409Sadrian if (sc->sc_debug & ATH_DEBUG_XMIT) 388239409Sadrian ath_printtxbuf(sc, bf, qnum, 0, 0); 389239438Sadrian#endif 390239409Sadrian bf->bf_lastds = (struct ath_desc *) ds; 391239290Sadrian 392239290Sadrian /* 393239290Sadrian * Don't forget to skip to the next descriptor. 394239290Sadrian */ 395239409Sadrian ds += sc->sc_tx_desclen; 396239290Sadrian dsp++; 397239290Sadrian 398239290Sadrian /* 399239290Sadrian * .. and don't forget to blank these out! 400239290Sadrian */ 401239290Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 402239290Sadrian bzero(segLenList, sizeof(segLenList)); 403218065Sadrian } 404233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 405218154Sadrian} 406218154Sadrian 407227364Sadrian/* 408227364Sadrian * Fill in the descriptor list for a aggregate subframe. 409227364Sadrian * 410227364Sadrian * The subframe is returned with the ds_link field in the last subframe 411227364Sadrian * pointing to 0. 412227364Sadrian */ 413218154Sadrianstatic void 414227364Sadrianath_tx_chaindesclist_subframe(struct ath_softc *sc, struct ath_buf *bf) 415218154Sadrian{ 416218154Sadrian struct ath_hal *ah = sc->sc_ah; 417227364Sadrian struct ath_desc *ds, *ds0; 418227364Sadrian int i; 419239053Sadrian HAL_DMA_ADDR bufAddrList[4]; 420239053Sadrian uint32_t segLenList[4]; 421239053Sadrian 422238708Sadrian /* 423238708Sadrian * XXX There's txdma and txdma_mgmt; the descriptor 424238708Sadrian * sizes must match. 425238708Sadrian */ 426238708Sadrian struct ath_descdma *dd = &sc->sc_txdma; 427218154Sadrian 428227364Sadrian ds0 = ds = bf->bf_desc; 429218154Sadrian 430218065Sadrian /* 431227364Sadrian * There's no need to call ath_hal_setupfirsttxdesc here; 432227364Sadrian * That's only going to occur for the first frame in an aggregate. 433227364Sadrian */ 434227364Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 435239053Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 436239053Sadrian bzero(segLenList, sizeof(segLenList)); 437227364Sadrian if (i == bf->bf_nseg - 1) 438238609Sadrian ath_hal_settxdesclink(ah, ds, 0); 439227364Sadrian else 440238609Sadrian ath_hal_settxdesclink(ah, ds, 441238708Sadrian bf->bf_daddr + dd->dd_descsize * (i + 1)); 442227364Sadrian 443239053Sadrian bufAddrList[0] = bf->bf_segs[i].ds_addr; 444239053Sadrian segLenList[0] = bf->bf_segs[i].ds_len; 445239053Sadrian 446227364Sadrian /* 447227364Sadrian * This performs the setup for an aggregate frame. 448227364Sadrian * This includes enabling the aggregate flags if needed. 449227364Sadrian */ 450227364Sadrian ath_hal_chaintxdesc(ah, ds, 451239053Sadrian bufAddrList, 452239053Sadrian segLenList, 453227364Sadrian bf->bf_state.bfs_pktlen, 454227364Sadrian bf->bf_state.bfs_hdrlen, 455227364Sadrian HAL_PKT_TYPE_AMPDU, /* forces aggregate bits to be set */ 456227364Sadrian bf->bf_state.bfs_keyix, 457227364Sadrian 0, /* cipher, calculated from keyix */ 458227364Sadrian bf->bf_state.bfs_ndelim, 459227364Sadrian i == 0, /* first segment */ 460233895Sadrian i == bf->bf_nseg - 1, /* last segment */ 461233895Sadrian bf->bf_next == NULL /* last sub-frame in aggr */ 462227364Sadrian ); 463227364Sadrian 464227364Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 465227364Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 466227364Sadrian __func__, i, ds->ds_link, ds->ds_data, 467227364Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 468227364Sadrian bf->bf_lastds = ds; 469233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 470233990Sadrian BUS_DMASYNC_PREWRITE); 471227364Sadrian } 472227364Sadrian} 473227364Sadrian 474227364Sadrian/* 475238947Sadrian * Set the rate control fields in the given descriptor based on 476238947Sadrian * the bf_state fields and node state. 477238947Sadrian * 478238947Sadrian * The bfs fields should already be set with the relevant rate 479238947Sadrian * control information, including whether MRR is to be enabled. 480238947Sadrian * 481238947Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 482238947Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 483238947Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 484238947Sadrian * unconditionally for 11n chips. These require the 11n rate 485238947Sadrian * scenario to be set if MCS rates are enabled, so it's easier 486238947Sadrian * to just always call it. The caller can then only set rates 2, 3 487238947Sadrian * and 4 if multi-rate retry is needed. 488238947Sadrian */ 489238947Sadrianstatic void 490238947Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 491238947Sadrian struct ath_buf *bf) 492238947Sadrian{ 493238947Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 494238947Sadrian 495238947Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 496238947Sadrian if (! bf->bf_state.bfs_ismrr) 497238947Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 498238947Sadrian 499238947Sadrian /* 500238947Sadrian * Always call - that way a retried descriptor will 501238947Sadrian * have the MRR fields overwritten. 502238947Sadrian * 503238947Sadrian * XXX TODO: see if this is really needed - setting up 504238947Sadrian * the first descriptor should set the MRR fields to 0 505238947Sadrian * for us anyway. 506238947Sadrian */ 507238947Sadrian if (ath_tx_is_11n(sc)) { 508238947Sadrian ath_buf_set_rate(sc, ni, bf); 509238947Sadrian } else { 510238947Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 511238947Sadrian , rc[1].ratecode, rc[1].tries 512238947Sadrian , rc[2].ratecode, rc[2].tries 513238947Sadrian , rc[3].ratecode, rc[3].tries 514238947Sadrian ); 515238947Sadrian } 516238947Sadrian} 517238947Sadrian 518238947Sadrian/* 519227364Sadrian * Setup segments+descriptors for an 11n aggregate. 520227364Sadrian * bf_first is the first buffer in the aggregate. 521227364Sadrian * The descriptor list must already been linked together using 522227364Sadrian * bf->bf_next. 523227364Sadrian */ 524227364Sadrianstatic void 525227364Sadrianath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first) 526227364Sadrian{ 527227364Sadrian struct ath_buf *bf, *bf_prev = NULL; 528227364Sadrian 529227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n", 530227364Sadrian __func__, bf_first->bf_state.bfs_nframes, 531227364Sadrian bf_first->bf_state.bfs_al); 532227364Sadrian 533227364Sadrian /* 534227364Sadrian * Setup all descriptors of all subframes. 535227364Sadrian */ 536227364Sadrian bf = bf_first; 537227364Sadrian while (bf != NULL) { 538227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 539227364Sadrian "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n", 540227364Sadrian __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen, 541227364Sadrian SEQNO(bf->bf_state.bfs_seqno)); 542227364Sadrian 543227364Sadrian /* Sub-frame setup */ 544227364Sadrian ath_tx_chaindesclist_subframe(sc, bf); 545227364Sadrian 546227364Sadrian /* 547227364Sadrian * Link the last descriptor of the previous frame 548227364Sadrian * to the beginning descriptor of this frame. 549227364Sadrian */ 550227364Sadrian if (bf_prev != NULL) 551238609Sadrian ath_hal_settxdesclink(sc->sc_ah, bf_prev->bf_lastds, 552238609Sadrian bf->bf_daddr); 553227364Sadrian 554227364Sadrian /* Save a copy so we can link the next descriptor in */ 555227364Sadrian bf_prev = bf; 556227364Sadrian bf = bf->bf_next; 557227364Sadrian } 558227364Sadrian 559227364Sadrian /* 560227364Sadrian * Setup first descriptor of first frame. 561227364Sadrian * chaintxdesc() overwrites the descriptor entries; 562227364Sadrian * setupfirsttxdesc() merges in things. 563227364Sadrian * Otherwise various fields aren't set correctly (eg flags). 564227364Sadrian */ 565227364Sadrian ath_hal_setupfirsttxdesc(sc->sc_ah, 566227364Sadrian bf_first->bf_desc, 567227364Sadrian bf_first->bf_state.bfs_al, 568233966Sadrian bf_first->bf_state.bfs_txflags | HAL_TXDESC_INTREQ, 569227364Sadrian bf_first->bf_state.bfs_txpower, 570227364Sadrian bf_first->bf_state.bfs_txrate0, 571227364Sadrian bf_first->bf_state.bfs_try0, 572227364Sadrian bf_first->bf_state.bfs_txantenna, 573227364Sadrian bf_first->bf_state.bfs_ctsrate, 574227364Sadrian bf_first->bf_state.bfs_ctsduration); 575227364Sadrian 576227364Sadrian /* 577227364Sadrian * Set the first descriptor bf_lastds field to point to 578227364Sadrian * the last descriptor in the last subframe, that's where 579227364Sadrian * the status update will occur. 580227364Sadrian */ 581227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 582227364Sadrian 583227364Sadrian /* 584227364Sadrian * And bf_last in the first descriptor points to the end of 585227364Sadrian * the aggregate list. 586227364Sadrian */ 587227364Sadrian bf_first->bf_last = bf_prev; 588227364Sadrian 589238947Sadrian /* 590238947Sadrian * setup first desc with rate and aggr info 591238947Sadrian */ 592238947Sadrian ath_tx_set_ratectrl(sc, bf_first->bf_node, bf_first); 593238947Sadrian 594238949Sadrian /* 595238949Sadrian * Setup the last descriptor in the list. 596238993Sadrian * 597238993Sadrian * bf_first->bf_lastds already points to it; the rate 598238993Sadrian * control information needs to be squirreled away here 599238993Sadrian * as well ans clearing the moreaggr/paddelim fields. 600238949Sadrian */ 601238993Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_first->bf_lastds, 602238949Sadrian bf_first->bf_desc); 603238949Sadrian 604227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 605227364Sadrian} 606227364Sadrian 607239051Sadrian/* 608239051Sadrian * Hand-off a frame to the multicast TX queue. 609239051Sadrian * 610239051Sadrian * This is a software TXQ which will be appended to the CAB queue 611239051Sadrian * during the beacon setup code. 612239051Sadrian * 613239051Sadrian * XXX TODO: since the AR9300 EDMA TX queue support wants the QCU ID 614239051Sadrian * as part of the TX descriptor, bf_state.bfs_txq must be updated 615239051Sadrian * with the actual hardware txq, or all of this will fall apart. 616239051Sadrian * 617239051Sadrian * XXX It may not be a bad idea to just stuff the QCU ID into bf_state 618239051Sadrian * and retire bfs_txq; then make sure the CABQ QCU ID is populated 619239051Sadrian * correctly. 620239051Sadrian */ 621227364Sadrianstatic void 622227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 623227364Sadrian struct ath_buf *bf) 624227364Sadrian{ 625227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 626227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 627227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 628227364Sadrian if (txq->axq_link != NULL) { 629227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 630227364Sadrian struct ieee80211_frame *wh; 631227364Sadrian 632227364Sadrian /* mark previous frame */ 633227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 634227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 635227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 636227364Sadrian BUS_DMASYNC_PREWRITE); 637227364Sadrian 638227364Sadrian /* link descriptor */ 639227364Sadrian *txq->axq_link = bf->bf_daddr; 640227364Sadrian } 641227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 642238609Sadrian ath_hal_gettxdesclinkptr(sc->sc_ah, bf->bf_lastds, &txq->axq_link); 643227364Sadrian} 644227364Sadrian 645227364Sadrian/* 646227364Sadrian * Hand-off packet to a hardware queue. 647227364Sadrian */ 648227364Sadrianstatic void 649229949Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, 650229949Sadrian struct ath_buf *bf) 651227364Sadrian{ 652227364Sadrian struct ath_hal *ah = sc->sc_ah; 653227364Sadrian 654227364Sadrian /* 655218065Sadrian * Insert the frame on the outbound list and pass it on 656218065Sadrian * to the hardware. Multicast frames buffered for power 657218065Sadrian * save stations and transmit from the CAB queue are stored 658218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 659218065Sadrian * the SWBA handler since frames only go out on DTIM and 660218065Sadrian * to avoid possible races. 661218065Sadrian */ 662227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 663218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 664227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 665227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 666227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 667227364Sadrian 668227651Sadrian#if 0 669227651Sadrian /* 670227651Sadrian * This causes a LOR. Find out where the PCU lock is being 671227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 672227651Sadrian * be occuring. 673227651Sadrian */ 674227651Sadrian ATH_PCU_LOCK(sc); 675227651Sadrian if (sc->sc_inreset_cnt) { 676227651Sadrian ATH_PCU_UNLOCK(sc); 677227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 678227651Sadrian "%s: called with sc_in_reset != 0\n", 679227651Sadrian __func__); 680227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 681227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 682227651Sadrian __func__, txq->axq_qnum, 683227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 684227651Sadrian txq->axq_depth); 685227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 686227651Sadrian if (bf->bf_state.bfs_aggr) 687227651Sadrian txq->axq_aggr_depth++; 688227651Sadrian /* 689227651Sadrian * There's no need to update axq_link; the hardware 690227651Sadrian * is in reset and once the reset is complete, any 691227651Sadrian * non-empty queues will simply have DMA restarted. 692227651Sadrian */ 693227651Sadrian return; 694227651Sadrian } 695227651Sadrian ATH_PCU_UNLOCK(sc); 696227651Sadrian#endif 697227651Sadrian 698227364Sadrian /* For now, so not to generate whitespace diffs */ 699227364Sadrian if (1) { 700218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 701218065Sadrian int qbusy; 702218065Sadrian 703218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 704218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 705218065Sadrian if (txq->axq_link == NULL) { 706218065Sadrian /* 707218065Sadrian * Be careful writing the address to TXDP. If 708218065Sadrian * the tx q is enabled then this write will be 709218065Sadrian * ignored. Normally this is not an issue but 710218065Sadrian * when tdma is in use and the q is beacon gated 711218065Sadrian * this race can occur. If the q is busy then 712218065Sadrian * defer the work to later--either when another 713218065Sadrian * packet comes along or when we prepare a beacon 714218065Sadrian * frame at SWBA. 715218065Sadrian */ 716218065Sadrian if (!qbusy) { 717229949Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 718229949Sadrian bf->bf_daddr); 719218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 720218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 721218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 722218065Sadrian __func__, txq->axq_qnum, 723218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 724218065Sadrian txq->axq_depth); 725218065Sadrian } else { 726218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 727218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 728218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 729218065Sadrian txq->axq_qnum); 730218065Sadrian } 731218065Sadrian } else { 732218065Sadrian *txq->axq_link = bf->bf_daddr; 733218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 734218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 735218065Sadrian txq->axq_qnum, txq->axq_link, 736229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 737229949Sadrian txq->axq_depth); 738218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 739218065Sadrian /* 740218065Sadrian * The q was busy when we previously tried 741218065Sadrian * to write the address of the first buffer 742218065Sadrian * in the chain. Since it's not busy now 743218065Sadrian * handle this chore. We are certain the 744218065Sadrian * buffer at the front is the right one since 745218065Sadrian * axq_link is NULL only when the buffer list 746218065Sadrian * is/was empty. 747218065Sadrian */ 748218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 749227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 750218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 751218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 752218065Sadrian "%s: Q%u restarted\n", __func__, 753218065Sadrian txq->axq_qnum); 754218065Sadrian } 755218065Sadrian } 756218065Sadrian#else 757218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 758218065Sadrian if (txq->axq_link == NULL) { 759218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 760218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 761218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 762218065Sadrian __func__, txq->axq_qnum, 763218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 764218065Sadrian txq->axq_depth); 765218065Sadrian } else { 766218065Sadrian *txq->axq_link = bf->bf_daddr; 767218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 768218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 769218065Sadrian txq->axq_qnum, txq->axq_link, 770229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 771229949Sadrian txq->axq_depth); 772218065Sadrian } 773218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 774227360Sadrian if (bf->bf_state.bfs_aggr) 775227360Sadrian txq->axq_aggr_depth++; 776238609Sadrian ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link); 777218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 778227364Sadrian } 779227364Sadrian} 780218065Sadrian 781227364Sadrian/* 782227364Sadrian * Restart TX DMA for the given TXQ. 783227364Sadrian * 784227364Sadrian * This must be called whether the queue is empty or not. 785227364Sadrian */ 786238930Sadrianstatic void 787238930Sadrianath_legacy_tx_dma_restart(struct ath_softc *sc, struct ath_txq *txq) 788227364Sadrian{ 789227364Sadrian struct ath_hal *ah = sc->sc_ah; 790232707Sadrian struct ath_buf *bf, *bf_last; 791218065Sadrian 792227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 793227364Sadrian 794227364Sadrian /* This is always going to be cleared, empty or not */ 795227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 796227364Sadrian 797232707Sadrian /* XXX make this ATH_TXQ_FIRST */ 798227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 799232707Sadrian bf_last = ATH_TXQ_LAST(txq, axq_q_s); 800232707Sadrian 801227364Sadrian if (bf == NULL) 802227364Sadrian return; 803227364Sadrian 804227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 805239120Sadrian ath_hal_gettxdesclinkptr(ah, bf_last->bf_lastds, &txq->axq_link); 806227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 807218065Sadrian} 808218065Sadrian 809227364Sadrian/* 810227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 811227364Sadrian * 812227364Sadrian * The relevant hardware txq should be locked. 813227364Sadrian */ 814227364Sadrianstatic void 815238930Sadrianath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq, 816238930Sadrian struct ath_buf *bf) 817227364Sadrian{ 818227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 819227364Sadrian 820227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 821227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 822227364Sadrian else 823227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 824227364Sadrian} 825227364Sadrian 826218154Sadrianstatic int 827218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 828229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 829229949Sadrian int *keyix) 830218154Sadrian{ 831233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 832233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 833233330Sadrian __func__, 834233330Sadrian *hdrlen, 835233330Sadrian *pktlen, 836233330Sadrian isfrag, 837233330Sadrian iswep, 838233330Sadrian m0); 839233330Sadrian 840218154Sadrian if (iswep) { 841218154Sadrian const struct ieee80211_cipher *cip; 842218154Sadrian struct ieee80211_key *k; 843218154Sadrian 844218154Sadrian /* 845218154Sadrian * Construct the 802.11 header+trailer for an encrypted 846218154Sadrian * frame. The only reason this can fail is because of an 847218154Sadrian * unknown or unsupported cipher/key type. 848218154Sadrian */ 849218154Sadrian k = ieee80211_crypto_encap(ni, m0); 850218154Sadrian if (k == NULL) { 851218154Sadrian /* 852218154Sadrian * This can happen when the key is yanked after the 853218154Sadrian * frame was queued. Just discard the frame; the 854218154Sadrian * 802.11 layer counts failures and provides 855218154Sadrian * debugging/diagnostics. 856218154Sadrian */ 857229949Sadrian return (0); 858218154Sadrian } 859218154Sadrian /* 860218154Sadrian * Adjust the packet + header lengths for the crypto 861218154Sadrian * additions and calculate the h/w key index. When 862218154Sadrian * a s/w mic is done the frame will have had any mic 863218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 864218154Sadrian * account for it. Otherwise we need to add it to the 865218154Sadrian * packet length. 866218154Sadrian */ 867218154Sadrian cip = k->wk_cipher; 868218154Sadrian (*hdrlen) += cip->ic_header; 869218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 870218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 871218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 872218154Sadrian (*pktlen) += cip->ic_miclen; 873218154Sadrian (*keyix) = k->wk_keyix; 874218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 875218154Sadrian /* 876218154Sadrian * Use station key cache slot, if assigned. 877218154Sadrian */ 878218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 879218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 880218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 881218154Sadrian } else 882218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 883218154Sadrian 884229949Sadrian return (1); 885218154Sadrian} 886218154Sadrian 887233989Sadrian/* 888233989Sadrian * Calculate whether interoperability protection is required for 889233989Sadrian * this frame. 890233989Sadrian * 891233989Sadrian * This requires the rate control information be filled in, 892233989Sadrian * as the protection requirement depends upon the current 893233989Sadrian * operating mode / PHY. 894233989Sadrian */ 895233989Sadrianstatic void 896233989Sadrianath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf) 897233989Sadrian{ 898233989Sadrian struct ieee80211_frame *wh; 899233989Sadrian uint8_t rix; 900233989Sadrian uint16_t flags; 901233989Sadrian int shortPreamble; 902233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 903233989Sadrian struct ifnet *ifp = sc->sc_ifp; 904233989Sadrian struct ieee80211com *ic = ifp->if_l2com; 905233989Sadrian 906233989Sadrian flags = bf->bf_state.bfs_txflags; 907233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 908233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 909233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 910233989Sadrian 911233989Sadrian /* 912233989Sadrian * If 802.11g protection is enabled, determine whether 913233989Sadrian * to use RTS/CTS or just CTS. Note that this is only 914233989Sadrian * done for OFDM unicast frames. 915233989Sadrian */ 916233989Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 917233989Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 918233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 919233989Sadrian bf->bf_state.bfs_doprot = 1; 920233989Sadrian /* XXX fragments must use CCK rates w/ protection */ 921233989Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 922233989Sadrian flags |= HAL_TXDESC_RTSENA; 923233989Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 924233989Sadrian flags |= HAL_TXDESC_CTSENA; 925233989Sadrian } 926233989Sadrian /* 927233989Sadrian * For frags it would be desirable to use the 928233989Sadrian * highest CCK rate for RTS/CTS. But stations 929233989Sadrian * farther away may detect it at a lower CCK rate 930233989Sadrian * so use the configured protection rate instead 931233989Sadrian * (for now). 932233989Sadrian */ 933233989Sadrian sc->sc_stats.ast_tx_protect++; 934233989Sadrian } 935233989Sadrian 936233989Sadrian /* 937233989Sadrian * If 11n protection is enabled and it's a HT frame, 938233989Sadrian * enable RTS. 939233989Sadrian * 940233989Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 941233989Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 942233989Sadrian * XXX indicates it's not a HT pure environment? 943233989Sadrian */ 944233989Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 945233989Sadrian rt->info[rix].phy == IEEE80211_T_HT && 946233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 947233989Sadrian flags |= HAL_TXDESC_RTSENA; 948233989Sadrian sc->sc_stats.ast_tx_htprotect++; 949233989Sadrian } 950233989Sadrian bf->bf_state.bfs_txflags = flags; 951233989Sadrian} 952233989Sadrian 953233989Sadrian/* 954233989Sadrian * Update the frame duration given the currently selected rate. 955233989Sadrian * 956233989Sadrian * This also updates the frame duration value, so it will require 957233989Sadrian * a DMA flush. 958233989Sadrian */ 959233989Sadrianstatic void 960233989Sadrianath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf) 961233989Sadrian{ 962233989Sadrian struct ieee80211_frame *wh; 963233989Sadrian uint8_t rix; 964233989Sadrian uint16_t flags; 965233989Sadrian int shortPreamble; 966233989Sadrian struct ath_hal *ah = sc->sc_ah; 967233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 968233989Sadrian int isfrag = bf->bf_m->m_flags & M_FRAG; 969233989Sadrian 970233989Sadrian flags = bf->bf_state.bfs_txflags; 971233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 972233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 973233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 974233989Sadrian 975233989Sadrian /* 976233989Sadrian * Calculate duration. This logically belongs in the 802.11 977233989Sadrian * layer but it lacks sufficient information to calculate it. 978233989Sadrian */ 979233989Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 980233989Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 981233989Sadrian u_int16_t dur; 982233989Sadrian if (shortPreamble) 983233989Sadrian dur = rt->info[rix].spAckDuration; 984233989Sadrian else 985233989Sadrian dur = rt->info[rix].lpAckDuration; 986233989Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 987233989Sadrian dur += dur; /* additional SIFS+ACK */ 988233989Sadrian KASSERT(bf->bf_m->m_nextpkt != NULL, ("no fragment")); 989233989Sadrian /* 990233989Sadrian * Include the size of next fragment so NAV is 991233989Sadrian * updated properly. The last fragment uses only 992233989Sadrian * the ACK duration 993233989Sadrian */ 994233989Sadrian dur += ath_hal_computetxtime(ah, rt, 995233989Sadrian bf->bf_m->m_nextpkt->m_pkthdr.len, 996233989Sadrian rix, shortPreamble); 997233989Sadrian } 998233989Sadrian if (isfrag) { 999233989Sadrian /* 1000233989Sadrian * Force hardware to use computed duration for next 1001233989Sadrian * fragment by disabling multi-rate retry which updates 1002233989Sadrian * duration based on the multi-rate duration table. 1003233989Sadrian */ 1004233989Sadrian bf->bf_state.bfs_ismrr = 0; 1005233989Sadrian bf->bf_state.bfs_try0 = ATH_TXMGTTRY; 1006233989Sadrian /* XXX update bfs_rc[0].try? */ 1007233989Sadrian } 1008233989Sadrian 1009233989Sadrian /* Update the duration field itself */ 1010233989Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 1011233989Sadrian } 1012233989Sadrian} 1013233989Sadrian 1014218932Sadrianstatic uint8_t 1015218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 1016227364Sadrian int cix, int shortPreamble) 1017218157Sadrian{ 1018218932Sadrian uint8_t ctsrate; 1019218932Sadrian 1020218157Sadrian /* 1021218157Sadrian * CTS transmit rate is derived from the transmit rate 1022218157Sadrian * by looking in the h/w rate table. We must also factor 1023218157Sadrian * in whether or not a short preamble is to be used. 1024218157Sadrian */ 1025218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 1026218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 1027218932Sadrian ctsrate = rt->info[cix].rateCode; 1028218932Sadrian 1029218932Sadrian /* XXX this should only matter for legacy rates */ 1030218932Sadrian if (shortPreamble) 1031218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 1032218932Sadrian 1033229949Sadrian return (ctsrate); 1034218932Sadrian} 1035218932Sadrian 1036218932Sadrian/* 1037218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 1038218932Sadrian */ 1039218932Sadrianstatic int 1040218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 1041218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 1042218932Sadrian int flags) 1043218932Sadrian{ 1044218932Sadrian int ctsduration = 0; 1045218932Sadrian 1046218932Sadrian /* This mustn't be called for HT modes */ 1047218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 1048218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 1049218932Sadrian __func__, rt->info[cix].rateCode); 1050229949Sadrian return (-1); 1051218932Sadrian } 1052218932Sadrian 1053218157Sadrian /* 1054218157Sadrian * Compute the transmit duration based on the frame 1055218157Sadrian * size and the size of an ACK frame. We call into the 1056218157Sadrian * HAL to do the computation since it depends on the 1057218157Sadrian * characteristics of the actual PHY being used. 1058218157Sadrian * 1059218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 1060218157Sadrian * use the precalculated ACK durations. 1061218157Sadrian */ 1062218157Sadrian if (shortPreamble) { 1063218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1064218932Sadrian ctsduration += rt->info[cix].spAckDuration; 1065218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1066218157Sadrian rt, pktlen, rix, AH_TRUE); 1067218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1068218932Sadrian ctsduration += rt->info[rix].spAckDuration; 1069218157Sadrian } else { 1070218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1071218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 1072218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1073218157Sadrian rt, pktlen, rix, AH_FALSE); 1074218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1075218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 1076218157Sadrian } 1077218932Sadrian 1078229949Sadrian return (ctsduration); 1079218157Sadrian} 1080218157Sadrian 1081227364Sadrian/* 1082227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 1083227364Sadrian * values. 1084227364Sadrian * 1085227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 1086227364Sadrian * and cts duration must be re-calculated. 1087227364Sadrian * 1088227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 1089227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 1090227364Sadrian * 1091227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 1092227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 1093227364Sadrian */ 1094227364Sadrianstatic void 1095227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 1096218065Sadrian{ 1097227364Sadrian uint16_t ctsduration = 0; 1098227364Sadrian uint8_t ctsrate = 0; 1099227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 1100227364Sadrian uint8_t cix = 0; 1101227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 1102227364Sadrian 1103227364Sadrian /* 1104227364Sadrian * No RTS/CTS enabled? Don't bother. 1105227364Sadrian */ 1106233966Sadrian if ((bf->bf_state.bfs_txflags & 1107227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 1108227364Sadrian /* XXX is this really needed? */ 1109227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1110227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1111227364Sadrian return; 1112227364Sadrian } 1113227364Sadrian 1114227364Sadrian /* 1115227364Sadrian * If protection is enabled, use the protection rix control 1116227364Sadrian * rate. Otherwise use the rate0 control rate. 1117227364Sadrian */ 1118227364Sadrian if (bf->bf_state.bfs_doprot) 1119227364Sadrian rix = sc->sc_protrix; 1120227364Sadrian else 1121227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 1122227364Sadrian 1123227364Sadrian /* 1124227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 1125227364Sadrian * use it. 1126227364Sadrian */ 1127227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 1128227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 1129227364Sadrian else 1130227364Sadrian /* Control rate from above */ 1131227364Sadrian cix = rt->info[rix].controlRate; 1132227364Sadrian 1133227364Sadrian /* Calculate the rtscts rate for the given cix */ 1134227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 1135227364Sadrian bf->bf_state.bfs_shpream); 1136227364Sadrian 1137227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 1138227364Sadrian if (! ath_tx_is_11n(sc)) 1139227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 1140227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 1141233966Sadrian rt, bf->bf_state.bfs_txflags); 1142227364Sadrian 1143227364Sadrian /* Squirrel away in ath_buf */ 1144227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 1145227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 1146227364Sadrian 1147227364Sadrian /* 1148227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 1149227364Sadrian */ 1150238961Sadrian if (!sc->sc_mrrprot) { 1151238961Sadrian bf->bf_state.bfs_ismrr = 0; 1152238961Sadrian bf->bf_state.bfs_try0 = 1153238961Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 1154238961Sadrian } 1155227364Sadrian} 1156227364Sadrian 1157227364Sadrian/* 1158227364Sadrian * Setup the descriptor chain for a normal or fast-frame 1159227364Sadrian * frame. 1160239051Sadrian * 1161239051Sadrian * XXX TODO: extend to include the destination hardware QCU ID. 1162239051Sadrian * Make sure that is correct. Make sure that when being added 1163239051Sadrian * to the mcastq, the CABQ QCUID is set or things will get a bit 1164239051Sadrian * odd. 1165227364Sadrian */ 1166227364Sadrianstatic void 1167227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 1168227364Sadrian{ 1169227364Sadrian struct ath_desc *ds = bf->bf_desc; 1170227364Sadrian struct ath_hal *ah = sc->sc_ah; 1171227364Sadrian 1172227364Sadrian ath_hal_setuptxdesc(ah, ds 1173227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 1174227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 1175227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 1176227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 1177227364Sadrian , bf->bf_state.bfs_txrate0 1178227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 1179227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 1180227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 1181233966Sadrian , bf->bf_state.bfs_txflags /* flags */ 1182227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 1183227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 1184227364Sadrian ); 1185227364Sadrian 1186227364Sadrian /* 1187227364Sadrian * This will be overriden when the descriptor chain is written. 1188227364Sadrian */ 1189227364Sadrian bf->bf_lastds = ds; 1190227364Sadrian bf->bf_last = bf; 1191227364Sadrian 1192238947Sadrian /* Set rate control and descriptor chain for this frame */ 1193238947Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1194238947Sadrian ath_tx_chaindesclist(sc, bf); 1195227364Sadrian} 1196227364Sadrian 1197227364Sadrian/* 1198227364Sadrian * Do a rate lookup. 1199227364Sadrian * 1200227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 1201227364Sadrian * Non-data frames and raw frames don't require it. 1202227364Sadrian * 1203227364Sadrian * This populates the primary and MRR entries; MRR values are 1204227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 1205227364Sadrian * pre-11n chipsets. 1206227364Sadrian * 1207227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 1208227364Sadrian * as they may depend upon the rate chosen. 1209227364Sadrian */ 1210227364Sadrianstatic void 1211227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 1212227364Sadrian{ 1213227364Sadrian uint8_t rate, rix; 1214227364Sadrian int try0; 1215227364Sadrian 1216227364Sadrian if (! bf->bf_state.bfs_doratelookup) 1217227364Sadrian return; 1218227364Sadrian 1219227364Sadrian /* Get rid of any previous state */ 1220227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1221227364Sadrian 1222227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 1223227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 1224227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 1225227364Sadrian 1226227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 1227227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1228227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 1229227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1230227364Sadrian 1231227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 1232227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 1233227364Sadrian bf->bf_state.bfs_rc); 1234227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 1235227364Sadrian 1236227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 1237227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 1238227364Sadrian bf->bf_state.bfs_try0 = try0; 1239227364Sadrian bf->bf_state.bfs_txrate0 = rate; 1240227364Sadrian} 1241227364Sadrian 1242227364Sadrian/* 1243227364Sadrian * Transmit the given frame to the hardware. 1244227364Sadrian * 1245227364Sadrian * The frame must already be setup; rate control must already have 1246227364Sadrian * been done. 1247227364Sadrian * 1248227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 1249227364Sadrian * it for this long when not doing software aggregation), later on 1250227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 1251227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 1252227364Sadrian */ 1253227364Sadrianstatic void 1254227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 1255227364Sadrian struct ath_buf *bf) 1256227364Sadrian{ 1257227364Sadrian 1258227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1259227364Sadrian 1260227364Sadrian /* Setup the descriptor before handoff */ 1261227364Sadrian ath_tx_do_ratelookup(sc, bf); 1262233989Sadrian ath_tx_calc_duration(sc, bf); 1263233989Sadrian ath_tx_calc_protection(sc, bf); 1264233989Sadrian ath_tx_set_rtscts(sc, bf); 1265227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1266227364Sadrian ath_tx_setds(sc, bf); 1267227364Sadrian 1268227364Sadrian /* Hand off to hardware */ 1269227364Sadrian ath_tx_handoff(sc, txq, bf); 1270227364Sadrian} 1271227364Sadrian 1272227364Sadrian 1273227364Sadrian 1274227364Sadrianstatic int 1275227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1276234009Sadrian struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq) 1277227364Sadrian{ 1278218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1279218065Sadrian struct ath_hal *ah = sc->sc_ah; 1280218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1281218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1282218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1283218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1284227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1285227364Sadrian u_int8_t rix = 0, txrate = 0; 1286218065Sadrian struct ath_desc *ds; 1287218065Sadrian struct ieee80211_frame *wh; 1288227364Sadrian u_int subtype, flags; 1289218065Sadrian HAL_PKT_TYPE atype; 1290218065Sadrian const HAL_RATE_TABLE *rt; 1291218065Sadrian HAL_BOOL shortPreamble; 1292218065Sadrian struct ath_node *an; 1293218065Sadrian u_int pri; 1294218065Sadrian 1295236880Sadrian /* 1296236880Sadrian * To ensure that both sequence numbers and the CCMP PN handling 1297236880Sadrian * is "correct", make sure that the relevant TID queue is locked. 1298236880Sadrian * Otherwise the CCMP PN and seqno may appear out of order, causing 1299236880Sadrian * re-ordered frames to have out of order CCMP PN's, resulting 1300236880Sadrian * in many, many frame drops. 1301236880Sadrian */ 1302236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1303236880Sadrian 1304218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1305218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1306218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1307218065Sadrian isfrag = m0->m_flags & M_FRAG; 1308218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1309218065Sadrian /* 1310218065Sadrian * Packet length must not include any 1311218065Sadrian * pad bytes; deduct them here. 1312218065Sadrian */ 1313218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1314218065Sadrian 1315218154Sadrian /* Handle encryption twiddling if needed */ 1316227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1317227364Sadrian &pktlen, &keyix)) { 1318218154Sadrian ath_freetx(m0); 1319218154Sadrian return EIO; 1320218154Sadrian } 1321218065Sadrian 1322218154Sadrian /* packet header may have moved, reset our local pointer */ 1323218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1324218065Sadrian 1325218065Sadrian pktlen += IEEE80211_CRC_LEN; 1326218065Sadrian 1327218065Sadrian /* 1328218065Sadrian * Load the DMA map so any coalescing is done. This 1329218065Sadrian * also calculates the number of descriptors we need. 1330218065Sadrian */ 1331218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1332218065Sadrian if (error != 0) 1333218065Sadrian return error; 1334218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1335218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1336218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1337218065Sadrian 1338218065Sadrian /* setup descriptors */ 1339218065Sadrian ds = bf->bf_desc; 1340218065Sadrian rt = sc->sc_currates; 1341218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1342218065Sadrian 1343218065Sadrian /* 1344218065Sadrian * NB: the 802.11 layer marks whether or not we should 1345218065Sadrian * use short preamble based on the current mode and 1346218065Sadrian * negotiated parameters. 1347218065Sadrian */ 1348218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1349218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1350218065Sadrian shortPreamble = AH_TRUE; 1351218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1352218065Sadrian } else { 1353218065Sadrian shortPreamble = AH_FALSE; 1354218065Sadrian } 1355218065Sadrian 1356218065Sadrian an = ATH_NODE(ni); 1357218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1358218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1359218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1360218065Sadrian /* XXX use txparams instead of fixed values */ 1361218065Sadrian /* 1362218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1363218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1364218065Sadrian */ 1365218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1366218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1367218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1368218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1369218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1370218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1371218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1372218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1373218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1374218065Sadrian else 1375218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1376218065Sadrian rix = an->an_mgmtrix; 1377218065Sadrian txrate = rt->info[rix].rateCode; 1378218065Sadrian if (shortPreamble) 1379218065Sadrian txrate |= rt->info[rix].shortPreamble; 1380218065Sadrian try0 = ATH_TXMGTTRY; 1381218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1382218065Sadrian break; 1383218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1384218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1385218065Sadrian rix = an->an_mgmtrix; 1386218065Sadrian txrate = rt->info[rix].rateCode; 1387218065Sadrian if (shortPreamble) 1388218065Sadrian txrate |= rt->info[rix].shortPreamble; 1389218065Sadrian try0 = ATH_TXMGTTRY; 1390218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1391218065Sadrian break; 1392218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1393218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1394218065Sadrian /* 1395218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1396218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1397218065Sadrian * the rate control module for the rate to use. 1398218065Sadrian */ 1399218065Sadrian if (ismcast) { 1400218065Sadrian rix = an->an_mcastrix; 1401218065Sadrian txrate = rt->info[rix].rateCode; 1402218065Sadrian if (shortPreamble) 1403218065Sadrian txrate |= rt->info[rix].shortPreamble; 1404218065Sadrian try0 = 1; 1405218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1406218065Sadrian /* XXX? maybe always use long preamble? */ 1407218065Sadrian rix = an->an_mgmtrix; 1408218065Sadrian txrate = rt->info[rix].rateCode; 1409218065Sadrian if (shortPreamble) 1410218065Sadrian txrate |= rt->info[rix].shortPreamble; 1411218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1412218065Sadrian } else { 1413227364Sadrian /* 1414227364Sadrian * Do rate lookup on each TX, rather than using 1415227364Sadrian * the hard-coded TX information decided here. 1416227364Sadrian */ 1417227364Sadrian ismrr = 1; 1418227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1419218065Sadrian } 1420218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1421218065Sadrian flags |= HAL_TXDESC_NOACK; 1422218065Sadrian break; 1423218065Sadrian default: 1424218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1425218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1426218065Sadrian /* XXX statistic */ 1427218065Sadrian ath_freetx(m0); 1428218065Sadrian return EIO; 1429218065Sadrian } 1430218065Sadrian 1431237041Sadrian /* 1432237041Sadrian * There are two known scenarios where the frame AC doesn't match 1433237041Sadrian * what the destination TXQ is. 1434237041Sadrian * 1435237041Sadrian * + non-QoS frames (eg management?) that the net80211 stack has 1436237041Sadrian * assigned a higher AC to, but since it's a non-QoS TID, it's 1437237041Sadrian * being thrown into TID 16. TID 16 gets the AC_BE queue. 1438237041Sadrian * It's quite possible that management frames should just be 1439237041Sadrian * direct dispatched to hardware rather than go via the software 1440237041Sadrian * queue; that should be investigated in the future. There are 1441237041Sadrian * some specific scenarios where this doesn't make sense, mostly 1442237041Sadrian * surrounding ADDBA request/response - hence why that is special 1443237041Sadrian * cased. 1444237041Sadrian * 1445237041Sadrian * + Multicast frames going into the VAP mcast queue. That shows up 1446237041Sadrian * as "TXQ 11". 1447237041Sadrian * 1448237041Sadrian * This driver should eventually support separate TID and TXQ locking, 1449237041Sadrian * allowing for arbitrary AC frames to appear on arbitrary software 1450237041Sadrian * queues, being queued to the "correct" hardware queue when needed. 1451237041Sadrian */ 1452237041Sadrian#if 0 1453235750Sadrian if (txq != sc->sc_ac2q[pri]) { 1454235750Sadrian device_printf(sc->sc_dev, 1455235750Sadrian "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n", 1456235750Sadrian __func__, 1457235750Sadrian txq, 1458235750Sadrian txq->axq_qnum, 1459235750Sadrian pri, 1460235750Sadrian sc->sc_ac2q[pri], 1461235750Sadrian sc->sc_ac2q[pri]->axq_qnum); 1462235750Sadrian } 1463237041Sadrian#endif 1464235750Sadrian 1465218065Sadrian /* 1466218065Sadrian * Calculate miscellaneous flags. 1467218065Sadrian */ 1468218065Sadrian if (ismcast) { 1469218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1470218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1471218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1472218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1473218065Sadrian sc->sc_stats.ast_tx_rts++; 1474218065Sadrian } 1475218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1476218065Sadrian sc->sc_stats.ast_tx_noack++; 1477218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1478218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1479218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1480218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1481218065Sadrian sc->sc_stats.ast_tdma_ack++; 1482218065Sadrian ath_freetx(m0); 1483218065Sadrian return EIO; 1484218065Sadrian } 1485218065Sadrian#endif 1486218065Sadrian 1487218065Sadrian /* 1488227364Sadrian * Determine if a tx interrupt should be generated for 1489227364Sadrian * this descriptor. We take a tx interrupt to reap 1490227364Sadrian * descriptors when the h/w hits an EOL condition or 1491227364Sadrian * when the descriptor is specifically marked to generate 1492227364Sadrian * an interrupt. We periodically mark descriptors in this 1493227364Sadrian * way to insure timely replenishing of the supply needed 1494227364Sadrian * for sending frames. Defering interrupts reduces system 1495227364Sadrian * load and potentially allows more concurrent work to be 1496227364Sadrian * done but if done to aggressively can cause senders to 1497227364Sadrian * backup. 1498227364Sadrian * 1499227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1500227364Sadrian * dynamically through sysctl. 1501218065Sadrian */ 1502227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1503227364Sadrian txq->axq_intrcnt = 0; 1504227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1505227364Sadrian flags |= HAL_TXDESC_INTREQ; 1506227364Sadrian txq->axq_intrcnt = 0; 1507227364Sadrian } 1508218932Sadrian 1509227364Sadrian /* This point forward is actual TX bits */ 1510218065Sadrian 1511218065Sadrian /* 1512218065Sadrian * At this point we are committed to sending the frame 1513218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1514218065Sadrian * case this frame is part of frag chain. 1515218065Sadrian */ 1516218065Sadrian m0->m_nextpkt = NULL; 1517218065Sadrian 1518218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1519218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1520218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1521218065Sadrian 1522218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1523218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1524218065Sadrian 1525218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1526218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1527218065Sadrian if (iswep) 1528218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1529218065Sadrian if (isfrag) 1530218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1531218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1532218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1533218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1534218065Sadrian 1535218065Sadrian ieee80211_radiotap_tx(vap, m0); 1536218065Sadrian } 1537218065Sadrian 1538227364Sadrian /* Blank the legacy rate array */ 1539227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1540227364Sadrian 1541218065Sadrian /* 1542227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1543227364Sadrian * the rate scenario. 1544227364Sadrian */ 1545227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1546227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1547227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1548227364Sadrian 1549227364Sadrian /* Store the decided rate index values away */ 1550227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1551227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1552227364Sadrian bf->bf_state.bfs_atype = atype; 1553227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1554227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1555227364Sadrian bf->bf_state.bfs_try0 = try0; 1556227364Sadrian bf->bf_state.bfs_keyix = keyix; 1557227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1558233966Sadrian bf->bf_state.bfs_txflags = flags; 1559227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1560227364Sadrian 1561227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1562227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1563227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1564227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1565227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1566227364Sadrian 1567227364Sadrian return 0; 1568227364Sadrian} 1569227364Sadrian 1570227364Sadrian/* 1571227364Sadrian * Direct-dispatch the current frame to the hardware. 1572227364Sadrian * 1573227364Sadrian * This can be called by the net80211 code. 1574227364Sadrian * 1575227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1576227364Sadrian * XXX aggregate scheduler so its serialised? 1577227364Sadrian */ 1578227364Sadrianint 1579227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1580227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1581227364Sadrian{ 1582227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1583227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1584232764Sadrian int r = 0; 1585227364Sadrian u_int pri; 1586227364Sadrian int tid; 1587227364Sadrian struct ath_txq *txq; 1588227364Sadrian int ismcast; 1589227364Sadrian const struct ieee80211_frame *wh; 1590227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1591236872Sadrian ieee80211_seq seqno; 1592227364Sadrian uint8_t type, subtype; 1593227364Sadrian 1594227364Sadrian /* 1595227364Sadrian * Determine the target hardware queue. 1596218065Sadrian * 1597234009Sadrian * For multicast frames, the txq gets overridden appropriately 1598234009Sadrian * depending upon the state of PS. 1599227364Sadrian * 1600227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1601227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1602227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1603227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1604227364Sadrian * having a node TID queued to multiple hardware TXQs. 1605227364Sadrian * This may change in the future but would require some locking 1606227364Sadrian * fudgery. 1607218065Sadrian */ 1608227364Sadrian pri = ath_tx_getac(sc, m0); 1609227364Sadrian tid = ath_tx_gettid(sc, m0); 1610218065Sadrian 1611227364Sadrian txq = sc->sc_ac2q[pri]; 1612227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1613227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1614227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1615227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1616227364Sadrian 1617232764Sadrian /* 1618232764Sadrian * Enforce how deep the multicast queue can grow. 1619232764Sadrian * 1620232764Sadrian * XXX duplicated in ath_raw_xmit(). 1621232764Sadrian */ 1622232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1623232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1624232764Sadrian 1625232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1626232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1627232764Sadrian r = ENOBUFS; 1628232764Sadrian } 1629232764Sadrian 1630232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1631232764Sadrian 1632232764Sadrian if (r != 0) { 1633232764Sadrian m_freem(m0); 1634232764Sadrian return r; 1635232764Sadrian } 1636232764Sadrian } 1637232764Sadrian 1638227364Sadrian /* A-MPDU TX */ 1639227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1640227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1641227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1642227364Sadrian 1643236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1644236872Sadrian __func__, tid, pri, is_ampdu); 1645227364Sadrian 1646239051Sadrian /* Set local packet state, used to queue packets to hardware */ 1647239051Sadrian bf->bf_state.bfs_tid = tid; 1648239051Sadrian bf->bf_state.bfs_txq = txq; 1649239051Sadrian bf->bf_state.bfs_pri = pri; 1650239051Sadrian 1651232753Sadrian /* 1652234009Sadrian * When servicing one or more stations in power-save mode 1653234009Sadrian * (or) if there is some mcast data waiting on the mcast 1654234009Sadrian * queue (to prevent out of order delivery) multicast frames 1655234009Sadrian * must be bufferd until after the beacon. 1656234009Sadrian * 1657234009Sadrian * TODO: we should lock the mcastq before we check the length. 1658232753Sadrian */ 1659239051Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) { 1660227364Sadrian txq = &avp->av_mcastq; 1661239051Sadrian /* 1662239051Sadrian * Mark the frame as eventually belonging on the CAB 1663239051Sadrian * queue, so the descriptor setup functions will 1664239051Sadrian * correctly initialise the descriptor 'qcuId' field. 1665239051Sadrian */ 1666239051Sadrian bf->bf_state.bfs_txq = sc->sc_cabq; 1667239051Sadrian } 1668227364Sadrian 1669227364Sadrian /* Do the generic frame setup */ 1670227364Sadrian /* XXX should just bzero the bf_state? */ 1671227364Sadrian bf->bf_state.bfs_dobaw = 0; 1672227364Sadrian 1673236880Sadrian /* 1674236880Sadrian * Acquire the TXQ lock early, so both the encap and seqno 1675236880Sadrian * are allocated together. 1676239051Sadrian * 1677239051Sadrian * XXX should TXQ for CABQ traffic be the multicast queue, 1678239051Sadrian * or the TXQ the given PRI would allocate from? (eg for 1679239051Sadrian * sequence number allocation locking.) 1680236880Sadrian */ 1681236880Sadrian ATH_TXQ_LOCK(txq); 1682236880Sadrian 1683227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1684236880Sadrian /* 1685236880Sadrian * Don't do it whilst pending; the net80211 layer still 1686236880Sadrian * assigns them. 1687236880Sadrian */ 1688227364Sadrian if (is_ampdu_tx) { 1689227364Sadrian /* 1690227364Sadrian * Always call; this function will 1691227364Sadrian * handle making sure that null data frames 1692227364Sadrian * don't get a sequence number from the current 1693227364Sadrian * TID and thus mess with the BAW. 1694227364Sadrian */ 1695236872Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1696236874Sadrian 1697236874Sadrian /* 1698236874Sadrian * Don't add QoS NULL frames to the BAW. 1699236874Sadrian */ 1700236872Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1701236872Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1702227364Sadrian bf->bf_state.bfs_dobaw = 1; 1703227364Sadrian } 1704218240Sadrian } 1705218240Sadrian 1706218065Sadrian /* 1707227364Sadrian * If needed, the sequence number has been assigned. 1708227364Sadrian * Squirrel it away somewhere easy to get to. 1709218065Sadrian */ 1710236872Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1711227364Sadrian 1712227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1713227364Sadrian if (is_ampdu_pending) 1714227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1715227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1716227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1717227364Sadrian 1718227364Sadrian /* This also sets up the DMA map */ 1719234009Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0, txq); 1720227364Sadrian 1721227364Sadrian if (r != 0) 1722236880Sadrian goto done; 1723227364Sadrian 1724227364Sadrian /* At this point m0 could have changed! */ 1725227364Sadrian m0 = bf->bf_m; 1726227364Sadrian 1727227364Sadrian#if 1 1728218065Sadrian /* 1729227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1730227364Sadrian * destination hardware queue. Don't bother software 1731227364Sadrian * queuing it. 1732218065Sadrian */ 1733227364Sadrian /* 1734227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1735227364Sadrian * destination hardware queue. Don't bother software 1736227364Sadrian * queuing it, as the TID will now be paused. 1737227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1738227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1739227364Sadrian * It queues directly to hardware because the TID is paused 1740227364Sadrian * at this point (and won't be unpaused until the BAR has 1741227364Sadrian * either been TXed successfully or max retries has been 1742227364Sadrian * reached.) 1743227364Sadrian */ 1744227364Sadrian if (txq == &avp->av_mcastq) { 1745235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1746233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1747227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1748227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1749227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1750235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1751227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1752227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1753227364Sadrian } else { 1754227364Sadrian /* add to software queue */ 1755235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1756233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1757227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1758227364Sadrian } 1759227364Sadrian#else 1760227364Sadrian /* 1761227364Sadrian * For now, since there's no software queue, 1762227364Sadrian * direct-dispatch to the hardware. 1763227364Sadrian */ 1764227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1765236880Sadrian#endif 1766236880Sadriandone: 1767227364Sadrian ATH_TXQ_UNLOCK(txq); 1768218065Sadrian 1769218065Sadrian return 0; 1770218065Sadrian} 1771218065Sadrian 1772218065Sadrianstatic int 1773218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1774218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1775218065Sadrian const struct ieee80211_bpf_params *params) 1776218065Sadrian{ 1777218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1778218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1779218065Sadrian struct ath_hal *ah = sc->sc_ah; 1780218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1781218065Sadrian int error, ismcast, ismrr; 1782218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1783227364Sadrian u_int8_t rix, txrate; 1784218065Sadrian struct ieee80211_frame *wh; 1785227364Sadrian u_int flags; 1786218065Sadrian HAL_PKT_TYPE atype; 1787218065Sadrian const HAL_RATE_TABLE *rt; 1788218065Sadrian struct ath_desc *ds; 1789218065Sadrian u_int pri; 1790227364Sadrian int o_tid = -1; 1791227364Sadrian int do_override; 1792218065Sadrian 1793218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1794218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1795218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1796218065Sadrian /* 1797218065Sadrian * Packet length must not include any 1798218065Sadrian * pad bytes; deduct them here. 1799218065Sadrian */ 1800218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1801218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1802218065Sadrian 1803227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1804227364Sadrian __func__, ismcast); 1805227364Sadrian 1806236880Sadrian pri = params->ibp_pri & 3; 1807236880Sadrian /* Override pri if the frame isn't a QoS one */ 1808236880Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1809236880Sadrian pri = ath_tx_getac(sc, m0); 1810236880Sadrian 1811236880Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1812236880Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1813236880Sadrian 1814236880Sadrian /* Map ADDBA to the correct priority */ 1815236880Sadrian if (do_override) { 1816236880Sadrian#if 0 1817236880Sadrian device_printf(sc->sc_dev, 1818236880Sadrian "%s: overriding tid %d pri %d -> %d\n", 1819236880Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1820236880Sadrian#endif 1821236880Sadrian pri = TID_TO_WME_AC(o_tid); 1822236880Sadrian } 1823236880Sadrian 1824236880Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1825236880Sadrian 1826218154Sadrian /* Handle encryption twiddling if needed */ 1827227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1828227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1829227364Sadrian &hdrlen, &pktlen, &keyix)) { 1830218154Sadrian ath_freetx(m0); 1831218154Sadrian return EIO; 1832218154Sadrian } 1833218154Sadrian /* packet header may have moved, reset our local pointer */ 1834218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1835218065Sadrian 1836227364Sadrian /* Do the generic frame setup */ 1837227364Sadrian /* XXX should just bzero the bf_state? */ 1838227364Sadrian bf->bf_state.bfs_dobaw = 0; 1839227364Sadrian 1840218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1841218065Sadrian if (error != 0) 1842218065Sadrian return error; 1843218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1844218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1845218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1846218065Sadrian 1847218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1848218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1849218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1850218065Sadrian flags |= HAL_TXDESC_RTSENA; 1851227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1852227364Sadrian /* XXX assume 11g/11n protection? */ 1853227364Sadrian bf->bf_state.bfs_doprot = 1; 1854218065Sadrian flags |= HAL_TXDESC_CTSENA; 1855227364Sadrian } 1856218065Sadrian /* XXX leave ismcast to injector? */ 1857218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1858218065Sadrian flags |= HAL_TXDESC_NOACK; 1859218065Sadrian 1860218065Sadrian rt = sc->sc_currates; 1861218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1862218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1863218065Sadrian txrate = rt->info[rix].rateCode; 1864218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1865218065Sadrian txrate |= rt->info[rix].shortPreamble; 1866218065Sadrian sc->sc_txrix = rix; 1867218065Sadrian try0 = params->ibp_try0; 1868218065Sadrian ismrr = (params->ibp_try1 != 0); 1869218065Sadrian txantenna = params->ibp_pri >> 2; 1870218065Sadrian if (txantenna == 0) /* XXX? */ 1871218065Sadrian txantenna = sc->sc_txantenna; 1872218157Sadrian 1873227364Sadrian /* 1874227364Sadrian * Since ctsrate is fixed, store it away for later 1875227364Sadrian * use when the descriptor fields are being set. 1876227364Sadrian */ 1877227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1878227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1879218157Sadrian 1880218065Sadrian /* 1881218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1882218065Sadrian * set the sequence number, duration, etc. 1883218065Sadrian */ 1884218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1885218065Sadrian 1886218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1887218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1888218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1889218065Sadrian 1890218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1891218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1892218065Sadrian 1893218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1894218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1895218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1896218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1897218065Sadrian if (m0->m_flags & M_FRAG) 1898218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1899218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1900218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1901218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1902218065Sadrian 1903218065Sadrian ieee80211_radiotap_tx(vap, m0); 1904218065Sadrian } 1905218065Sadrian 1906218065Sadrian /* 1907218065Sadrian * Formulate first tx descriptor with tx controls. 1908218065Sadrian */ 1909218065Sadrian ds = bf->bf_desc; 1910218065Sadrian /* XXX check return value? */ 1911227364Sadrian 1912227364Sadrian /* Store the decided rate index values away */ 1913227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1914227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1915227364Sadrian bf->bf_state.bfs_atype = atype; 1916227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1917227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1918227364Sadrian bf->bf_state.bfs_try0 = try0; 1919227364Sadrian bf->bf_state.bfs_keyix = keyix; 1920227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1921233966Sadrian bf->bf_state.bfs_txflags = flags; 1922227364Sadrian bf->bf_state.bfs_shpream = 1923227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1924218065Sadrian 1925239051Sadrian /* Set local packet state, used to queue packets to hardware */ 1926239051Sadrian bf->bf_state.bfs_tid = WME_AC_TO_TID(pri); 1927239051Sadrian bf->bf_state.bfs_txq = sc->sc_ac2q[pri]; 1928239051Sadrian bf->bf_state.bfs_pri = pri; 1929239051Sadrian 1930227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1931227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1932227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1933227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1934218240Sadrian 1935227364Sadrian /* Blank the legacy rate array */ 1936227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1937218240Sadrian 1938227364Sadrian bf->bf_state.bfs_rc[0].rix = 1939227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1940227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1941227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1942227364Sadrian 1943227364Sadrian if (ismrr) { 1944227364Sadrian int rix; 1945227364Sadrian 1946227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1947227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1948227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1949227364Sadrian 1950227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1951227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1952227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1953227364Sadrian 1954227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1955227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1956227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1957218065Sadrian } 1958227364Sadrian /* 1959227364Sadrian * All the required rate control decisions have been made; 1960227364Sadrian * fill in the rc flags. 1961227364Sadrian */ 1962227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1963218065Sadrian 1964227364Sadrian /* NB: no buffered multicast in power save support */ 1965227364Sadrian 1966227364Sadrian /* 1967227364Sadrian * If we're overiding the ADDBA destination, dump directly 1968227364Sadrian * into the hardware queue, right after any pending 1969227364Sadrian * frames to that node are. 1970227364Sadrian */ 1971227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1972227364Sadrian __func__, do_override); 1973227364Sadrian 1974227364Sadrian if (do_override) { 1975227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1976227364Sadrian } else { 1977227364Sadrian /* Queue to software queue */ 1978227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1979227364Sadrian } 1980236880Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1981227364Sadrian 1982218065Sadrian return 0; 1983218065Sadrian} 1984218065Sadrian 1985227364Sadrian/* 1986227364Sadrian * Send a raw frame. 1987227364Sadrian * 1988227364Sadrian * This can be called by net80211. 1989227364Sadrian */ 1990218065Sadrianint 1991218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1992218065Sadrian const struct ieee80211_bpf_params *params) 1993218065Sadrian{ 1994218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1995218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1996218065Sadrian struct ath_softc *sc = ifp->if_softc; 1997218065Sadrian struct ath_buf *bf; 1998232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1999232764Sadrian int error = 0; 2000218065Sadrian 2001227651Sadrian ATH_PCU_LOCK(sc); 2002227651Sadrian if (sc->sc_inreset_cnt > 0) { 2003227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 2004227651Sadrian __func__); 2005227651Sadrian error = EIO; 2006227651Sadrian ATH_PCU_UNLOCK(sc); 2007227651Sadrian goto bad0; 2008227651Sadrian } 2009227651Sadrian sc->sc_txstart_cnt++; 2010227651Sadrian ATH_PCU_UNLOCK(sc); 2011227651Sadrian 2012218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 2013218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 2014218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 2015218065Sadrian "!running" : "invalid"); 2016218065Sadrian m_freem(m); 2017218065Sadrian error = ENETDOWN; 2018218065Sadrian goto bad; 2019218065Sadrian } 2020232764Sadrian 2021218065Sadrian /* 2022232764Sadrian * Enforce how deep the multicast queue can grow. 2023232764Sadrian * 2024232764Sadrian * XXX duplicated in ath_tx_start(). 2025232764Sadrian */ 2026232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2027232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 2028232764Sadrian 2029232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 2030232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 2031232764Sadrian error = ENOBUFS; 2032232764Sadrian } 2033232764Sadrian 2034232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 2035232764Sadrian 2036232764Sadrian if (error != 0) { 2037232764Sadrian m_freem(m); 2038232764Sadrian goto bad; 2039232764Sadrian } 2040232764Sadrian } 2041232764Sadrian 2042232764Sadrian /* 2043218065Sadrian * Grab a TX buffer and associated resources. 2044218065Sadrian */ 2045237000Sadrian bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 2046218065Sadrian if (bf == NULL) { 2047218065Sadrian sc->sc_stats.ast_tx_nobuf++; 2048218065Sadrian m_freem(m); 2049218065Sadrian error = ENOBUFS; 2050218065Sadrian goto bad; 2051218065Sadrian } 2052218065Sadrian 2053218065Sadrian if (params == NULL) { 2054218065Sadrian /* 2055218065Sadrian * Legacy path; interpret frame contents to decide 2056218065Sadrian * precisely how to send the frame. 2057218065Sadrian */ 2058218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 2059218065Sadrian error = EIO; /* XXX */ 2060218065Sadrian goto bad2; 2061218065Sadrian } 2062218065Sadrian } else { 2063218065Sadrian /* 2064218065Sadrian * Caller supplied explicit parameters to use in 2065218065Sadrian * sending the frame. 2066218065Sadrian */ 2067218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 2068218065Sadrian error = EIO; /* XXX */ 2069218065Sadrian goto bad2; 2070218065Sadrian } 2071218065Sadrian } 2072218065Sadrian sc->sc_wd_timer = 5; 2073218065Sadrian ifp->if_opackets++; 2074218065Sadrian sc->sc_stats.ast_tx_raw++; 2075218065Sadrian 2076227651Sadrian ATH_PCU_LOCK(sc); 2077227651Sadrian sc->sc_txstart_cnt--; 2078227651Sadrian ATH_PCU_UNLOCK(sc); 2079227651Sadrian 2080218065Sadrian return 0; 2081218065Sadrianbad2: 2082218065Sadrian ATH_TXBUF_LOCK(sc); 2083236993Sadrian ath_returnbuf_head(sc, bf); 2084218065Sadrian ATH_TXBUF_UNLOCK(sc); 2085218065Sadrianbad: 2086227651Sadrian ATH_PCU_LOCK(sc); 2087227651Sadrian sc->sc_txstart_cnt--; 2088227651Sadrian ATH_PCU_UNLOCK(sc); 2089227651Sadrianbad0: 2090218065Sadrian ifp->if_oerrors++; 2091218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 2092218065Sadrian ieee80211_free_node(ni); 2093227651Sadrian 2094218065Sadrian return error; 2095218065Sadrian} 2096227364Sadrian 2097227364Sadrian/* Some helper functions */ 2098227364Sadrian 2099227364Sadrian/* 2100227364Sadrian * ADDBA (and potentially others) need to be placed in the same 2101227364Sadrian * hardware queue as the TID/node it's relating to. This is so 2102227364Sadrian * it goes out after any pending non-aggregate frames to the 2103227364Sadrian * same node/TID. 2104227364Sadrian * 2105227364Sadrian * If this isn't done, the ADDBA can go out before the frames 2106227364Sadrian * queued in hardware. Even though these frames have a sequence 2107227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 2108227364Sadrian * no frames whose sequence numbers are after the ADDBA should 2109227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 2110227364Sadrian * will simply drop them as being out of the BAW. 2111227364Sadrian * 2112227364Sadrian * The frames can't be appended to the TID software queue - it'll 2113227364Sadrian * never be sent out. So these frames have to be directly 2114227364Sadrian * dispatched to the hardware, rather than queued in software. 2115227364Sadrian * So if this function returns true, the TXQ has to be 2116227364Sadrian * overridden and it has to be directly dispatched. 2117227364Sadrian * 2118227364Sadrian * It's a dirty hack, but someone's gotta do it. 2119227364Sadrian */ 2120227364Sadrian 2121227364Sadrian/* 2122227364Sadrian * XXX doesn't belong here! 2123227364Sadrian */ 2124227364Sadrianstatic int 2125227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 2126227364Sadrian{ 2127227364Sadrian /* Type: Management frame? */ 2128227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 2129227364Sadrian IEEE80211_FC0_TYPE_MGT) 2130227364Sadrian return 0; 2131227364Sadrian 2132227364Sadrian /* Subtype: Action frame? */ 2133227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 2134227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 2135227364Sadrian return 0; 2136227364Sadrian 2137227364Sadrian return 1; 2138227364Sadrian} 2139227364Sadrian 2140227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 2141227364Sadrian/* 2142227364Sadrian * Return an alternate TID for ADDBA request frames. 2143227364Sadrian * 2144227364Sadrian * Yes, this likely should be done in the net80211 layer. 2145227364Sadrian */ 2146227364Sadrianstatic int 2147227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 2148227364Sadrian struct ieee80211_node *ni, 2149227364Sadrian struct mbuf *m0, int *tid) 2150227364Sadrian{ 2151227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 2152227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 2153227364Sadrian uint8_t *frm; 2154227364Sadrian uint16_t baparamset; 2155227364Sadrian 2156227364Sadrian /* Not action frame? Bail */ 2157227364Sadrian if (! ieee80211_is_action(wh)) 2158227364Sadrian return 0; 2159227364Sadrian 2160227364Sadrian /* XXX Not needed for frames we send? */ 2161227364Sadrian#if 0 2162227364Sadrian /* Correct length? */ 2163227364Sadrian if (! ieee80211_parse_action(ni, m)) 2164227364Sadrian return 0; 2165227364Sadrian#endif 2166227364Sadrian 2167227364Sadrian /* Extract out action frame */ 2168227364Sadrian frm = (u_int8_t *)&wh[1]; 2169227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 2170227364Sadrian 2171227364Sadrian /* Not ADDBA? Bail */ 2172227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 2173227364Sadrian return 0; 2174227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 2175227364Sadrian return 0; 2176227364Sadrian 2177227364Sadrian /* Extract TID, return it */ 2178227364Sadrian baparamset = le16toh(ia->rq_baparamset); 2179227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 2180227364Sadrian 2181227364Sadrian return 1; 2182227364Sadrian} 2183227364Sadrian#undef MS 2184227364Sadrian 2185227364Sadrian/* Per-node software queue operations */ 2186227364Sadrian 2187227364Sadrian/* 2188227364Sadrian * Add the current packet to the given BAW. 2189227364Sadrian * It is assumed that the current packet 2190227364Sadrian * 2191227364Sadrian * + fits inside the BAW; 2192227364Sadrian * + already has had a sequence number allocated. 2193227364Sadrian * 2194227364Sadrian * Since the BAW status may be modified by both the ath task and 2195227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2196227364Sadrian */ 2197227364Sadrianvoid 2198227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 2199227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 2200227364Sadrian{ 2201227364Sadrian int index, cindex; 2202227364Sadrian struct ieee80211_tx_ampdu *tap; 2203227364Sadrian 2204227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2205236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2206227364Sadrian 2207227364Sadrian if (bf->bf_state.bfs_isretried) 2208227364Sadrian return; 2209227364Sadrian 2210236886Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2211236886Sadrian 2212236880Sadrian if (! bf->bf_state.bfs_dobaw) { 2213236880Sadrian device_printf(sc->sc_dev, 2214236880Sadrian "%s: dobaw=0, seqno=%d, window %d:%d\n", 2215236880Sadrian __func__, 2216236880Sadrian SEQNO(bf->bf_state.bfs_seqno), 2217236880Sadrian tap->txa_start, 2218236880Sadrian tap->txa_wnd); 2219236880Sadrian } 2220236880Sadrian 2221227364Sadrian if (bf->bf_state.bfs_addedbaw) 2222227364Sadrian device_printf(sc->sc_dev, 2223236872Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 2224229949Sadrian "baw head=%d tail=%d\n", 2225236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2226229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2227229949Sadrian tid->baw_tail); 2228227364Sadrian 2229227364Sadrian /* 2230236880Sadrian * Verify that the given sequence number is not outside of the 2231236880Sadrian * BAW. Complain loudly if that's the case. 2232236880Sadrian */ 2233236880Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2234236880Sadrian SEQNO(bf->bf_state.bfs_seqno))) { 2235236880Sadrian device_printf(sc->sc_dev, 2236236880Sadrian "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; " 2237236880Sadrian "baw head=%d tail=%d\n", 2238236880Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2239236880Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2240236880Sadrian tid->baw_tail); 2241236880Sadrian } 2242236880Sadrian 2243236880Sadrian /* 2244227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2245227364Sadrian * the txa state contains the current baw start. 2246227364Sadrian */ 2247227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2248227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2249227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2250236872Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2251229949Sadrian "baw head=%d tail=%d\n", 2252236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2253229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2254229949Sadrian tid->baw_tail); 2255227364Sadrian 2256227364Sadrian 2257227364Sadrian#if 0 2258227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2259227364Sadrian#endif 2260227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2261227364Sadrian device_printf(sc->sc_dev, 2262227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2263227364Sadrian "head=%d, tail=%d)\n", 2264227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2265227364Sadrian device_printf(sc->sc_dev, 2266227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2267227364Sadrian __func__, 2268227364Sadrian tid->tx_buf[cindex], 2269227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2270227364Sadrian bf, 2271227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2272227364Sadrian ); 2273227364Sadrian } 2274227364Sadrian tid->tx_buf[cindex] = bf; 2275227364Sadrian 2276229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2277229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2278227364Sadrian tid->baw_tail = cindex; 2279227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2280227364Sadrian } 2281227364Sadrian} 2282227364Sadrian 2283227364Sadrian/* 2284227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2285227398Sadrian * 2286227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2287227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2288227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2289227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2290227398Sadrian * tracking array to maintain consistency. 2291227398Sadrian */ 2292227398Sadrianstatic void 2293227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2294227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2295227398Sadrian{ 2296227398Sadrian int index, cindex; 2297227398Sadrian struct ieee80211_tx_ampdu *tap; 2298227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2299227398Sadrian 2300227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2301236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2302227398Sadrian 2303227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2304227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2305227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2306227398Sadrian 2307227398Sadrian /* 2308227398Sadrian * Just warn for now; if it happens then we should find out 2309227398Sadrian * about it. It's highly likely the aggregation session will 2310227398Sadrian * soon hang. 2311227398Sadrian */ 2312227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2313227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2314227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2315227398Sadrian __func__); 2316227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2317227398Sadrian __func__, 2318227398Sadrian old_bf->bf_state.bfs_seqno, 2319227398Sadrian new_bf->bf_state.bfs_seqno); 2320227398Sadrian } 2321227398Sadrian 2322227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2323227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2324227398Sadrian " has m BA session may hang.\n", 2325227398Sadrian __func__); 2326227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2327227398Sadrian __func__, 2328227398Sadrian old_bf, new_bf); 2329227398Sadrian } 2330227398Sadrian 2331227398Sadrian tid->tx_buf[cindex] = new_bf; 2332227398Sadrian} 2333227398Sadrian 2334227398Sadrian/* 2335227364Sadrian * seq_start - left edge of BAW 2336227364Sadrian * seq_next - current/next sequence number to allocate 2337227364Sadrian * 2338227364Sadrian * Since the BAW status may be modified by both the ath task and 2339227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2340227364Sadrian */ 2341227364Sadrianstatic void 2342227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2343227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2344227364Sadrian{ 2345227364Sadrian int index, cindex; 2346227364Sadrian struct ieee80211_tx_ampdu *tap; 2347227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2348227364Sadrian 2349227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2350236879Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2351227364Sadrian 2352227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2353227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2354227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2355227364Sadrian 2356227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2357236872Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2358229949Sadrian "baw head=%d, tail=%d\n", 2359236872Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2360227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2361227364Sadrian 2362227364Sadrian /* 2363227364Sadrian * If this occurs then we have a big problem - something else 2364227364Sadrian * has slid tap->txa_start along without updating the BAW 2365227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2366227364Sadrian * completely busted. 2367227364Sadrian * 2368227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2369227364Sadrian * it's quite possible that a cloned buffer is making its way 2370227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2371227364Sadrian */ 2372227364Sadrian if (tid->tx_buf[cindex] != bf) { 2373227364Sadrian device_printf(sc->sc_dev, 2374227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2375227364Sadrian __func__, 2376227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2377227364Sadrian tid->tx_buf[cindex], 2378227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2379227364Sadrian } 2380227364Sadrian 2381227364Sadrian tid->tx_buf[cindex] = NULL; 2382227364Sadrian 2383229949Sadrian while (tid->baw_head != tid->baw_tail && 2384229949Sadrian !tid->tx_buf[tid->baw_head]) { 2385227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2386227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2387227364Sadrian } 2388229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2389229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2390227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2391227364Sadrian} 2392227364Sadrian 2393227364Sadrian/* 2394227364Sadrian * Mark the current node/TID as ready to TX. 2395227364Sadrian * 2396227364Sadrian * This is done to make it easy for the software scheduler to 2397227364Sadrian * find which nodes have data to send. 2398227364Sadrian * 2399227364Sadrian * The TXQ lock must be held. 2400227364Sadrian */ 2401227364Sadrianstatic void 2402227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2403227364Sadrian{ 2404227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2405227364Sadrian 2406227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2407227364Sadrian 2408227364Sadrian if (tid->paused) 2409227364Sadrian return; /* paused, can't schedule yet */ 2410227364Sadrian 2411227364Sadrian if (tid->sched) 2412227364Sadrian return; /* already scheduled */ 2413227364Sadrian 2414227364Sadrian tid->sched = 1; 2415227364Sadrian 2416227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2417227364Sadrian} 2418227364Sadrian 2419227364Sadrian/* 2420227364Sadrian * Mark the current node as no longer needing to be polled for 2421227364Sadrian * TX packets. 2422227364Sadrian * 2423227364Sadrian * The TXQ lock must be held. 2424227364Sadrian */ 2425227364Sadrianstatic void 2426227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2427227364Sadrian{ 2428227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2429227364Sadrian 2430227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2431227364Sadrian 2432227364Sadrian if (tid->sched == 0) 2433227364Sadrian return; 2434227364Sadrian 2435227364Sadrian tid->sched = 0; 2436227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2437227364Sadrian} 2438227364Sadrian 2439227364Sadrian/* 2440227364Sadrian * Assign a sequence number manually to the given frame. 2441227364Sadrian * 2442227364Sadrian * This should only be called for A-MPDU TX frames. 2443227364Sadrian */ 2444236872Sadrianstatic ieee80211_seq 2445227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2446227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2447227364Sadrian{ 2448227364Sadrian struct ieee80211_frame *wh; 2449227364Sadrian int tid, pri; 2450227364Sadrian ieee80211_seq seqno; 2451227364Sadrian uint8_t subtype; 2452227364Sadrian 2453227364Sadrian /* TID lookup */ 2454227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2455227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2456227364Sadrian tid = WME_AC_TO_TID(pri); 2457236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2458236872Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2459227364Sadrian 2460227364Sadrian /* XXX Is it a control frame? Ignore */ 2461227364Sadrian 2462227364Sadrian /* Does the packet require a sequence number? */ 2463227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2464227364Sadrian return -1; 2465227364Sadrian 2466236880Sadrian ATH_TID_LOCK_ASSERT(sc, &(ATH_NODE(ni)->an_tid[tid])); 2467236880Sadrian 2468227364Sadrian /* 2469227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2470227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2471227364Sadrian * 2472227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2473227364Sadrian * data frame sequence number in the aggregation state updates, so 2474227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2475227364Sadrian * RX side. 2476227364Sadrian */ 2477227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2478227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2479236880Sadrian /* XXX no locking for this TID? This is a bit of a problem. */ 2480227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2481227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2482227364Sadrian } else { 2483227364Sadrian /* Manually assign sequence number */ 2484227364Sadrian seqno = ni->ni_txseqs[tid]; 2485227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2486227364Sadrian } 2487227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2488227364Sadrian M_SEQNO_SET(m0, seqno); 2489227364Sadrian 2490227364Sadrian /* Return so caller can do something with it if needed */ 2491236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2492227364Sadrian return seqno; 2493227364Sadrian} 2494227364Sadrian 2495227364Sadrian/* 2496227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2497227364Sadrian * If the frame is out of BAW, queue. 2498227364Sadrian * Otherwise, schedule it as a single frame. 2499227364Sadrian */ 2500227364Sadrianstatic void 2501239051Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, 2502239051Sadrian struct ath_txq *txq, struct ath_buf *bf) 2503227364Sadrian{ 2504227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2505239051Sadrian// struct ath_txq *txq = bf->bf_state.bfs_txq; 2506227364Sadrian struct ieee80211_tx_ampdu *tap; 2507227364Sadrian 2508239051Sadrian if (txq != bf->bf_state.bfs_txq) { 2509239051Sadrian device_printf(sc->sc_dev, "%s: txq %d != bfs_txq %d!\n", 2510239051Sadrian __func__, 2511239051Sadrian txq->axq_qnum, 2512239051Sadrian bf->bf_state.bfs_txq->axq_qnum); 2513239051Sadrian } 2514239051Sadrian 2515227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2516236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2517227364Sadrian 2518227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2519227364Sadrian 2520227364Sadrian /* paused? queue */ 2521227364Sadrian if (tid->paused) { 2522236876Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2523233480Sadrian /* XXX don't sched - we're paused! */ 2524227364Sadrian return; 2525227364Sadrian } 2526227364Sadrian 2527227364Sadrian /* outside baw? queue */ 2528227364Sadrian if (bf->bf_state.bfs_dobaw && 2529227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2530227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2531236878Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2532227364Sadrian ath_tx_tid_sched(sc, tid); 2533227364Sadrian return; 2534227364Sadrian } 2535227364Sadrian 2536240180Sadrian /* 2537240180Sadrian * This is a temporary check and should be removed once 2538240180Sadrian * all the relevant code paths have been fixed. 2539240180Sadrian * 2540240180Sadrian * During aggregate retries, it's possible that the head 2541240180Sadrian * frame will fail (which has the bfs_aggr and bfs_nframes 2542240180Sadrian * fields set for said aggregate) and will be retried as 2543240180Sadrian * a single frame. In this instance, the values should 2544240180Sadrian * be reset or the completion code will get upset with you. 2545240180Sadrian */ 2546240180Sadrian if (bf->bf_state.bfs_aggr != 0 || bf->bf_state.bfs_nframes > 1) { 2547240180Sadrian device_printf(sc->sc_dev, "%s: bfs_aggr=%d, bfs_nframes=%d\n", 2548240180Sadrian __func__, 2549240180Sadrian bf->bf_state.bfs_aggr, 2550240180Sadrian bf->bf_state.bfs_nframes); 2551240180Sadrian bf->bf_state.bfs_aggr = 0; 2552240180Sadrian bf->bf_state.bfs_nframes = 1; 2553240180Sadrian } 2554240180Sadrian 2555227364Sadrian /* Direct dispatch to hardware */ 2556227364Sadrian ath_tx_do_ratelookup(sc, bf); 2557233989Sadrian ath_tx_calc_duration(sc, bf); 2558233989Sadrian ath_tx_calc_protection(sc, bf); 2559233989Sadrian ath_tx_set_rtscts(sc, bf); 2560227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2561227364Sadrian ath_tx_setds(sc, bf); 2562227364Sadrian 2563227364Sadrian /* Statistics */ 2564227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2565227364Sadrian 2566227364Sadrian /* Track per-TID hardware queue depth correctly */ 2567227364Sadrian tid->hwq_depth++; 2568227364Sadrian 2569227364Sadrian /* Add to BAW */ 2570227364Sadrian if (bf->bf_state.bfs_dobaw) { 2571227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2572227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2573227364Sadrian } 2574227364Sadrian 2575227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2576227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2577227364Sadrian 2578227364Sadrian /* Hand off to hardware */ 2579227364Sadrian ath_tx_handoff(sc, txq, bf); 2580227364Sadrian} 2581227364Sadrian 2582227364Sadrian/* 2583227364Sadrian * Attempt to send the packet. 2584227364Sadrian * If the queue isn't busy, direct-dispatch. 2585227364Sadrian * If the queue is busy enough, queue the given packet on the 2586227364Sadrian * relevant software queue. 2587227364Sadrian */ 2588227364Sadrianvoid 2589227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2590227364Sadrian struct ath_buf *bf) 2591227364Sadrian{ 2592227364Sadrian struct ath_node *an = ATH_NODE(ni); 2593227364Sadrian struct ieee80211_frame *wh; 2594227364Sadrian struct ath_tid *atid; 2595227364Sadrian int pri, tid; 2596227364Sadrian struct mbuf *m0 = bf->bf_m; 2597227364Sadrian 2598236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2599236880Sadrian 2600227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2601227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2602227364Sadrian pri = ath_tx_getac(sc, m0); 2603227364Sadrian tid = ath_tx_gettid(sc, m0); 2604227364Sadrian atid = &an->an_tid[tid]; 2605227364Sadrian 2606236873Sadrian ATH_TID_LOCK_ASSERT(sc, atid); 2607236873Sadrian 2608236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2609236872Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2610227364Sadrian 2611227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2612239051Sadrian /* XXX potentially duplicate info, re-check */ 2613239051Sadrian /* XXX remember, txq must be the hardware queue, not the av_mcastq */ 2614227364Sadrian bf->bf_state.bfs_tid = tid; 2615227364Sadrian bf->bf_state.bfs_txq = txq; 2616227364Sadrian bf->bf_state.bfs_pri = pri; 2617227364Sadrian 2618227364Sadrian /* 2619227364Sadrian * If the hardware queue isn't busy, queue it directly. 2620227364Sadrian * If the hardware queue is busy, queue it. 2621227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2622227364Sadrian * queue it. 2623227364Sadrian */ 2624227364Sadrian if (atid->paused) { 2625227364Sadrian /* TID is paused, queue */ 2626236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2627227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2628227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2629227364Sadrian /* AMPDU pending; queue */ 2630236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2631227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2632227364Sadrian /* XXX sched? */ 2633227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2634227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2635236877Sadrian 2636236877Sadrian /* 2637236877Sadrian * Always queue the frame to the tail of the list. 2638236877Sadrian */ 2639236877Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2640236877Sadrian 2641236877Sadrian /* 2642236877Sadrian * If the hardware queue isn't busy, direct dispatch 2643236877Sadrian * the head frame in the list. Don't schedule the 2644236877Sadrian * TID - let it build some more frames first? 2645236877Sadrian * 2646236877Sadrian * Otherwise, schedule the TID. 2647236877Sadrian */ 2648229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2649236877Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2650236877Sadrian ATH_TXQ_REMOVE(atid, bf, bf_list); 2651240180Sadrian 2652240180Sadrian /* 2653240180Sadrian * Ensure it's definitely treated as a non-AMPDU 2654240180Sadrian * frame - this information may have been left 2655240180Sadrian * over from a previous attempt. 2656240180Sadrian */ 2657240180Sadrian bf->bf_state.bfs_aggr = 0; 2658240180Sadrian bf->bf_state.bfs_nframes = 1; 2659240180Sadrian 2660240180Sadrian /* Queue to the hardware */ 2661239051Sadrian ath_tx_xmit_aggr(sc, an, txq, bf); 2662233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2663236872Sadrian "%s: xmit_aggr\n", 2664236872Sadrian __func__); 2665229949Sadrian } else { 2666229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2667236872Sadrian "%s: ampdu; swq'ing\n", 2668236872Sadrian __func__); 2669227364Sadrian ath_tx_tid_sched(sc, atid); 2670227364Sadrian } 2671227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2672227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2673236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2674227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2675227364Sadrian } else { 2676227364Sadrian /* Busy; queue */ 2677236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2678227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2679227364Sadrian ath_tx_tid_sched(sc, atid); 2680227364Sadrian } 2681227364Sadrian} 2682227364Sadrian 2683227364Sadrian/* 2684227364Sadrian * Do the basic frame setup stuff that's required before the frame 2685227364Sadrian * is added to a software queue. 2686227364Sadrian * 2687227364Sadrian * All frames get mostly the same treatment and it's done once. 2688227364Sadrian * Retransmits fiddle with things like the rate control setup, 2689227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2690227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2691227364Sadrian * 2692227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2693227364Sadrian * m0 may not be valid. 2694227364Sadrian */ 2695227364Sadrian 2696227364Sadrian 2697227364Sadrian/* 2698227364Sadrian * Configure the per-TID node state. 2699227364Sadrian * 2700227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2701227364Sadrian * else to put it just yet. 2702227364Sadrian * 2703227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2704227364Sadrian */ 2705227364Sadrianvoid 2706227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2707227364Sadrian{ 2708227364Sadrian int i, j; 2709227364Sadrian struct ath_tid *atid; 2710227364Sadrian 2711227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2712227364Sadrian atid = &an->an_tid[i]; 2713227364Sadrian TAILQ_INIT(&atid->axq_q); 2714227364Sadrian atid->tid = i; 2715227364Sadrian atid->an = an; 2716227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2717227364Sadrian atid->tx_buf[j] = NULL; 2718227364Sadrian atid->baw_head = atid->baw_tail = 0; 2719227364Sadrian atid->paused = 0; 2720227364Sadrian atid->sched = 0; 2721227364Sadrian atid->hwq_depth = 0; 2722227364Sadrian atid->cleanup_inprogress = 0; 2723227364Sadrian if (i == IEEE80211_NONQOS_TID) 2724227364Sadrian atid->ac = WME_AC_BE; 2725227364Sadrian else 2726227364Sadrian atid->ac = TID_TO_WME_AC(i); 2727227364Sadrian } 2728227364Sadrian} 2729227364Sadrian 2730227364Sadrian/* 2731227364Sadrian * Pause the current TID. This stops packets from being transmitted 2732227364Sadrian * on it. 2733227364Sadrian * 2734227364Sadrian * Since this is also called from upper layers as well as the driver, 2735227364Sadrian * it will get the TID lock. 2736227364Sadrian */ 2737227364Sadrianstatic void 2738227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2739227364Sadrian{ 2740233908Sadrian 2741233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2742227364Sadrian tid->paused++; 2743227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2744227364Sadrian __func__, tid->paused); 2745227364Sadrian} 2746227364Sadrian 2747227364Sadrian/* 2748227364Sadrian * Unpause the current TID, and schedule it if needed. 2749227364Sadrian */ 2750227364Sadrianstatic void 2751227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2752227364Sadrian{ 2753227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2754227364Sadrian 2755227364Sadrian tid->paused--; 2756227364Sadrian 2757227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2758227364Sadrian __func__, tid->paused); 2759227364Sadrian 2760227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2761227364Sadrian return; 2762227364Sadrian } 2763227364Sadrian 2764227364Sadrian ath_tx_tid_sched(sc, tid); 2765227364Sadrian /* Punt some frames to the hardware if needed */ 2766233673Sadrian //ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2767233673Sadrian taskqueue_enqueue(sc->sc_tq, &sc->sc_txqtask); 2768227364Sadrian} 2769227364Sadrian 2770227364Sadrian/* 2771233908Sadrian * Suspend the queue because we need to TX a BAR. 2772233908Sadrian */ 2773233908Sadrianstatic void 2774233908Sadrianath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid) 2775233908Sadrian{ 2776233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2777233908Sadrian 2778235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2779235676Sadrian "%s: tid=%p, bar_wait=%d, bar_tx=%d, called\n", 2780233908Sadrian __func__, 2781235676Sadrian tid, 2782235676Sadrian tid->bar_wait, 2783235676Sadrian tid->bar_tx); 2784233908Sadrian 2785233908Sadrian /* We shouldn't be called when bar_tx is 1 */ 2786233908Sadrian if (tid->bar_tx) { 2787233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx is 1?!\n", 2788233908Sadrian __func__); 2789233908Sadrian } 2790233908Sadrian 2791233908Sadrian /* If we've already been called, just be patient. */ 2792233908Sadrian if (tid->bar_wait) 2793233908Sadrian return; 2794233908Sadrian 2795233908Sadrian /* Wait! */ 2796233908Sadrian tid->bar_wait = 1; 2797233908Sadrian 2798233908Sadrian /* Only one pause, no matter how many frames fail */ 2799233908Sadrian ath_tx_tid_pause(sc, tid); 2800233908Sadrian} 2801233908Sadrian 2802233908Sadrian/* 2803233908Sadrian * We've finished with BAR handling - either we succeeded or 2804233908Sadrian * failed. Either way, unsuspend TX. 2805233908Sadrian */ 2806233908Sadrianstatic void 2807233908Sadrianath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid) 2808233908Sadrian{ 2809233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2810233908Sadrian 2811235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2812233908Sadrian "%s: tid=%p, called\n", 2813233908Sadrian __func__, 2814233908Sadrian tid); 2815233908Sadrian 2816233908Sadrian if (tid->bar_tx == 0 || tid->bar_wait == 0) { 2817233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx=%d, bar_wait=%d: ?\n", 2818233908Sadrian __func__, tid->bar_tx, tid->bar_wait); 2819233908Sadrian } 2820233908Sadrian 2821233908Sadrian tid->bar_tx = tid->bar_wait = 0; 2822233908Sadrian ath_tx_tid_resume(sc, tid); 2823233908Sadrian} 2824233908Sadrian 2825233908Sadrian/* 2826233908Sadrian * Return whether we're ready to TX a BAR frame. 2827233908Sadrian * 2828233908Sadrian * Requires the TID lock be held. 2829233908Sadrian */ 2830233908Sadrianstatic int 2831233908Sadrianath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid) 2832233908Sadrian{ 2833233908Sadrian 2834233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2835233908Sadrian 2836233908Sadrian if (tid->bar_wait == 0 || tid->hwq_depth > 0) 2837233908Sadrian return (0); 2838233908Sadrian 2839235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, "%s: tid=%p (%d), bar ready\n", 2840235491Sadrian __func__, tid, tid->tid); 2841235491Sadrian 2842233908Sadrian return (1); 2843233908Sadrian} 2844233908Sadrian 2845233908Sadrian/* 2846233908Sadrian * Check whether the current TID is ready to have a BAR 2847233908Sadrian * TXed and if so, do the TX. 2848233908Sadrian * 2849233908Sadrian * Since the TID/TXQ lock can't be held during a call to 2850233908Sadrian * ieee80211_send_bar(), we have to do the dirty thing of unlocking it, 2851233908Sadrian * sending the BAR and locking it again. 2852233908Sadrian * 2853233908Sadrian * Eventually, the code to send the BAR should be broken out 2854233908Sadrian * from this routine so the lock doesn't have to be reacquired 2855233908Sadrian * just to be immediately dropped by the caller. 2856233908Sadrian */ 2857233908Sadrianstatic void 2858233908Sadrianath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid) 2859233908Sadrian{ 2860233908Sadrian struct ieee80211_tx_ampdu *tap; 2861233908Sadrian 2862233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2863233908Sadrian 2864235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2865233908Sadrian "%s: tid=%p, called\n", 2866233908Sadrian __func__, 2867233908Sadrian tid); 2868233908Sadrian 2869233908Sadrian tap = ath_tx_get_tx_tid(tid->an, tid->tid); 2870233908Sadrian 2871233908Sadrian /* 2872233908Sadrian * This is an error condition! 2873233908Sadrian */ 2874233908Sadrian if (tid->bar_wait == 0 || tid->bar_tx == 1) { 2875233908Sadrian device_printf(sc->sc_dev, 2876233908Sadrian "%s: tid=%p, bar_tx=%d, bar_wait=%d: ?\n", 2877233908Sadrian __func__, 2878233908Sadrian tid, 2879233908Sadrian tid->bar_tx, 2880233908Sadrian tid->bar_wait); 2881233908Sadrian return; 2882233908Sadrian } 2883233908Sadrian 2884233908Sadrian /* Don't do anything if we still have pending frames */ 2885233908Sadrian if (tid->hwq_depth > 0) { 2886235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2887233908Sadrian "%s: tid=%p, hwq_depth=%d, waiting\n", 2888233908Sadrian __func__, 2889233908Sadrian tid, 2890233908Sadrian tid->hwq_depth); 2891233908Sadrian return; 2892233908Sadrian } 2893233908Sadrian 2894233908Sadrian /* We're now about to TX */ 2895233908Sadrian tid->bar_tx = 1; 2896233908Sadrian 2897233908Sadrian /* 2898233908Sadrian * Calculate new BAW left edge, now that all frames have either 2899233908Sadrian * succeeded or failed. 2900233908Sadrian * 2901233908Sadrian * XXX verify this is _actually_ the valid value to begin at! 2902233908Sadrian */ 2903235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2904233908Sadrian "%s: tid=%p, new BAW left edge=%d\n", 2905233908Sadrian __func__, 2906233908Sadrian tid, 2907233908Sadrian tap->txa_start); 2908233908Sadrian 2909233908Sadrian /* Try sending the BAR frame */ 2910233908Sadrian /* We can't hold the lock here! */ 2911233908Sadrian 2912233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2913233908Sadrian if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) { 2914233908Sadrian /* Success? Now we wait for notification that it's done */ 2915233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2916233908Sadrian return; 2917233908Sadrian } 2918233908Sadrian 2919233908Sadrian /* Failure? For now, warn loudly and continue */ 2920233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2921233908Sadrian device_printf(sc->sc_dev, "%s: tid=%p, failed to TX BAR, continue!\n", 2922233908Sadrian __func__, tid); 2923233908Sadrian ath_tx_tid_bar_unsuspend(sc, tid); 2924233908Sadrian} 2925233908Sadrian 2926233908Sadrian 2927233908Sadrian/* 2928227364Sadrian * Free any packets currently pending in the software TX queue. 2929227364Sadrian * 2930227364Sadrian * This will be called when a node is being deleted. 2931227364Sadrian * 2932227364Sadrian * It can also be called on an active node during an interface 2933227364Sadrian * reset or state transition. 2934227364Sadrian * 2935227364Sadrian * (From Linux/reference): 2936227364Sadrian * 2937227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2938227364Sadrian * sequence number(s) without setting the retry bit. The 2939227364Sadrian * alternative is to give up on these and BAR the receiver's window 2940227364Sadrian * forward. 2941227364Sadrian */ 2942227364Sadrianstatic void 2943229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 2944229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 2945227364Sadrian{ 2946227364Sadrian struct ath_buf *bf; 2947227364Sadrian struct ieee80211_tx_ampdu *tap; 2948227364Sadrian struct ieee80211_node *ni = &an->an_node; 2949227364Sadrian int t = 0; 2950227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2951227364Sadrian 2952227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2953227364Sadrian 2954227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2955227364Sadrian 2956227364Sadrian /* Walk the queue, free frames */ 2957227364Sadrian for (;;) { 2958227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2959227364Sadrian if (bf == NULL) { 2960227364Sadrian break; 2961227364Sadrian } 2962227364Sadrian 2963227364Sadrian if (t == 0) { 2964227364Sadrian device_printf(sc->sc_dev, 2965233330Sadrian "%s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 2966236872Sadrian "seqno=%d, retry=%d\n", 2967233330Sadrian __func__, ni, bf, 2968233330Sadrian bf->bf_state.bfs_addedbaw, 2969233330Sadrian bf->bf_state.bfs_dobaw, 2970233480Sadrian SEQNO(bf->bf_state.bfs_seqno), 2971233480Sadrian bf->bf_state.bfs_retries); 2972233330Sadrian device_printf(sc->sc_dev, 2973235491Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d\n", 2974233480Sadrian __func__, ni, bf, 2975233480Sadrian tid->axq_depth, 2976235491Sadrian tid->hwq_depth, 2977235491Sadrian tid->bar_wait); 2978233480Sadrian device_printf(sc->sc_dev, 2979236872Sadrian "%s: node %p: tid %d: txq_depth=%d, " 2980227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2981229949Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, " 2982229949Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 2983236872Sadrian __func__, ni, tid->tid, txq->axq_depth, 2984227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2985227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2986227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2987227364Sadrian ni->ni_txseqs[tid->tid]); 2988229165Sadrian 2989229165Sadrian /* XXX Dump the frame, see what it is? */ 2990229165Sadrian ieee80211_dump_pkt(ni->ni_ic, 2991229165Sadrian mtod(bf->bf_m, const uint8_t *), 2992229165Sadrian bf->bf_m->m_len, 0, -1); 2993229165Sadrian 2994233897Sadrian t = 1; 2995227364Sadrian } 2996227364Sadrian 2997227364Sadrian 2998227364Sadrian /* 2999227364Sadrian * If the current TID is running AMPDU, update 3000227364Sadrian * the BAW. 3001227364Sadrian */ 3002227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 3003227364Sadrian bf->bf_state.bfs_dobaw) { 3004227364Sadrian /* 3005227364Sadrian * Only remove the frame from the BAW if it's 3006227364Sadrian * been transmitted at least once; this means 3007227364Sadrian * the frame was in the BAW to begin with. 3008227364Sadrian */ 3009227364Sadrian if (bf->bf_state.bfs_retries > 0) { 3010227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 3011227364Sadrian bf->bf_state.bfs_dobaw = 0; 3012227364Sadrian } 3013227364Sadrian /* 3014227364Sadrian * This has become a non-fatal error now 3015227364Sadrian */ 3016227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3017227364Sadrian device_printf(sc->sc_dev, 3018227364Sadrian "%s: wasn't added: seqno %d\n", 3019227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3020227364Sadrian } 3021227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3022227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 3023227364Sadrian } 3024227364Sadrian 3025227364Sadrian /* 3026227364Sadrian * Now that it's completed, grab the TID lock and update 3027227364Sadrian * the sequence number and BAW window. 3028227364Sadrian * Because sequence numbers have been assigned to frames 3029227364Sadrian * that haven't been sent yet, it's entirely possible 3030227364Sadrian * we'll be called with some pending frames that have not 3031227364Sadrian * been transmitted. 3032227364Sadrian * 3033227364Sadrian * The cleaner solution is to do the sequence number allocation 3034227364Sadrian * when the packet is first transmitted - and thus the "retries" 3035227364Sadrian * check above would be enough to update the BAW/seqno. 3036227364Sadrian */ 3037227364Sadrian 3038227364Sadrian /* But don't do it for non-QoS TIDs */ 3039227364Sadrian if (tap) { 3040227364Sadrian#if 0 3041227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3042227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 3043227364Sadrian __func__, an, tid->tid, tap->txa_start); 3044227364Sadrian#endif 3045227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 3046227364Sadrian tid->baw_tail = tid->baw_head; 3047227364Sadrian } 3048227364Sadrian} 3049227364Sadrian 3050227364Sadrian/* 3051227364Sadrian * Flush all software queued packets for the given node. 3052227364Sadrian * 3053227364Sadrian * This occurs when a completion handler frees the last buffer 3054227364Sadrian * for a node, and the node is thus freed. This causes the node 3055227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 3056227364Sadrian */ 3057227364Sadrianvoid 3058227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 3059227364Sadrian{ 3060227364Sadrian int tid; 3061227364Sadrian ath_bufhead bf_cq; 3062227364Sadrian struct ath_buf *bf; 3063227364Sadrian 3064227364Sadrian TAILQ_INIT(&bf_cq); 3065227364Sadrian 3066227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 3067227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3068227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 3069227364Sadrian 3070227364Sadrian /* Remove this tid from the list of active tids */ 3071227364Sadrian ATH_TXQ_LOCK(txq); 3072227364Sadrian ath_tx_tid_unsched(sc, atid); 3073227364Sadrian 3074227364Sadrian /* Free packets */ 3075227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 3076227364Sadrian ATH_TXQ_UNLOCK(txq); 3077227364Sadrian } 3078227364Sadrian 3079227364Sadrian /* Handle completed frames */ 3080227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3081227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3082227364Sadrian ath_tx_default_comp(sc, bf, 0); 3083227364Sadrian } 3084227364Sadrian} 3085227364Sadrian 3086227364Sadrian/* 3087227364Sadrian * Drain all the software TXQs currently with traffic queued. 3088227364Sadrian */ 3089227364Sadrianvoid 3090227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 3091227364Sadrian{ 3092227364Sadrian struct ath_tid *tid; 3093227364Sadrian ath_bufhead bf_cq; 3094227364Sadrian struct ath_buf *bf; 3095227364Sadrian 3096227364Sadrian TAILQ_INIT(&bf_cq); 3097227364Sadrian ATH_TXQ_LOCK(txq); 3098227364Sadrian 3099227364Sadrian /* 3100227364Sadrian * Iterate over all active tids for the given txq, 3101227364Sadrian * flushing and unsched'ing them 3102227364Sadrian */ 3103227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 3104227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 3105227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 3106227364Sadrian ath_tx_tid_unsched(sc, tid); 3107227364Sadrian } 3108227364Sadrian 3109227364Sadrian ATH_TXQ_UNLOCK(txq); 3110227364Sadrian 3111227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3112227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3113227364Sadrian ath_tx_default_comp(sc, bf, 0); 3114227364Sadrian } 3115227364Sadrian} 3116227364Sadrian 3117227364Sadrian/* 3118227364Sadrian * Handle completion of non-aggregate session frames. 3119227364Sadrian */ 3120227364Sadrianvoid 3121227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3122227364Sadrian{ 3123227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3124227364Sadrian struct ath_node *an = ATH_NODE(ni); 3125227364Sadrian int tid = bf->bf_state.bfs_tid; 3126227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3127227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3128227364Sadrian 3129227364Sadrian /* The TID state is protected behind the TXQ lock */ 3130227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3131227364Sadrian 3132227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 3133227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 3134227364Sadrian 3135227364Sadrian atid->hwq_depth--; 3136227364Sadrian if (atid->hwq_depth < 0) 3137227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3138227364Sadrian __func__, atid->hwq_depth); 3139227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3140227364Sadrian 3141227364Sadrian /* 3142227364Sadrian * punt to rate control if we're not being cleaned up 3143227364Sadrian * during a hw queue drain and the frame wanted an ACK. 3144227364Sadrian */ 3145233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3146227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3147227364Sadrian ts, bf->bf_state.bfs_pktlen, 3148227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3149227364Sadrian 3150227364Sadrian ath_tx_default_comp(sc, bf, fail); 3151227364Sadrian} 3152227364Sadrian 3153227364Sadrian/* 3154227364Sadrian * Handle cleanup of aggregate session packets that aren't 3155227364Sadrian * an A-MPDU. 3156227364Sadrian * 3157227364Sadrian * There's no need to update the BAW here - the session is being 3158227364Sadrian * torn down. 3159227364Sadrian */ 3160227364Sadrianstatic void 3161227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3162227364Sadrian{ 3163227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3164227364Sadrian struct ath_node *an = ATH_NODE(ni); 3165227364Sadrian int tid = bf->bf_state.bfs_tid; 3166227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3167227364Sadrian 3168227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 3169227364Sadrian __func__, tid, atid->incomp); 3170227364Sadrian 3171227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3172227364Sadrian atid->incomp--; 3173227364Sadrian if (atid->incomp == 0) { 3174227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3175227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3176227364Sadrian __func__, tid); 3177227364Sadrian atid->cleanup_inprogress = 0; 3178227364Sadrian ath_tx_tid_resume(sc, atid); 3179227364Sadrian } 3180227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3181227364Sadrian 3182227364Sadrian ath_tx_default_comp(sc, bf, 0); 3183227364Sadrian} 3184227364Sadrian 3185227364Sadrian/* 3186227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 3187227364Sadrian * unaggregated. 3188227364Sadrian * 3189227364Sadrian * - Discard all retry frames from the s/w queue. 3190227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 3191227364Sadrian * - Count the number of unacked frames, and let transmit completion 3192227364Sadrian * handle it later. 3193227364Sadrian * 3194227364Sadrian * The caller is responsible for pausing the TID. 3195227364Sadrian */ 3196227364Sadrianstatic void 3197235749Sadrianath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 3198227364Sadrian{ 3199227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3200227364Sadrian struct ieee80211_tx_ampdu *tap; 3201227364Sadrian struct ath_buf *bf, *bf_next; 3202227364Sadrian ath_bufhead bf_cq; 3203227364Sadrian 3204235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 3205227364Sadrian "%s: TID %d: called\n", __func__, tid); 3206227364Sadrian 3207227364Sadrian TAILQ_INIT(&bf_cq); 3208227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3209227364Sadrian 3210227364Sadrian /* 3211227364Sadrian * Update the frames in the software TX queue: 3212227364Sadrian * 3213227364Sadrian * + Discard retry frames in the queue 3214227364Sadrian * + Fix the completion function to be non-aggregate 3215227364Sadrian */ 3216227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 3217227364Sadrian while (bf) { 3218227364Sadrian if (bf->bf_state.bfs_isretried) { 3219227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 3220227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 3221227364Sadrian atid->axq_depth--; 3222227364Sadrian if (bf->bf_state.bfs_dobaw) { 3223227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3224227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3225227364Sadrian device_printf(sc->sc_dev, 3226227364Sadrian "%s: wasn't added: seqno %d\n", 3227229949Sadrian __func__, 3228229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3229227364Sadrian } 3230227364Sadrian bf->bf_state.bfs_dobaw = 0; 3231227364Sadrian /* 3232227364Sadrian * Call the default completion handler with "fail" just 3233227364Sadrian * so upper levels are suitably notified about this. 3234227364Sadrian */ 3235227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3236227364Sadrian bf = bf_next; 3237227364Sadrian continue; 3238227364Sadrian } 3239227364Sadrian /* Give these the default completion handler */ 3240227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3241227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 3242227364Sadrian } 3243227364Sadrian 3244227364Sadrian /* The caller is required to pause the TID */ 3245227364Sadrian#if 0 3246227364Sadrian /* Pause the TID */ 3247227364Sadrian ath_tx_tid_pause(sc, atid); 3248227364Sadrian#endif 3249227364Sadrian 3250227364Sadrian /* 3251227364Sadrian * Calculate what hardware-queued frames exist based 3252227364Sadrian * on the current BAW size. Ie, what frames have been 3253227364Sadrian * added to the TX hardware queue for this TID but 3254227364Sadrian * not yet ACKed. 3255227364Sadrian */ 3256227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3257227364Sadrian /* Need the lock - fiddling with BAW */ 3258227364Sadrian while (atid->baw_head != atid->baw_tail) { 3259227364Sadrian if (atid->tx_buf[atid->baw_head]) { 3260227364Sadrian atid->incomp++; 3261227364Sadrian atid->cleanup_inprogress = 1; 3262227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 3263227364Sadrian } 3264227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 3265227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 3266227364Sadrian } 3267227364Sadrian 3268227364Sadrian /* 3269227364Sadrian * If cleanup is required, defer TID scheduling 3270227364Sadrian * until all the HW queued packets have been 3271227364Sadrian * sent. 3272227364Sadrian */ 3273227364Sadrian if (! atid->cleanup_inprogress) 3274227364Sadrian ath_tx_tid_resume(sc, atid); 3275227364Sadrian 3276227364Sadrian if (atid->cleanup_inprogress) 3277227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3278227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 3279227364Sadrian __func__, tid, atid->incomp); 3280227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3281227364Sadrian 3282227364Sadrian /* Handle completing frames and fail them */ 3283227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3284227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3285227364Sadrian ath_tx_default_comp(sc, bf, 1); 3286227364Sadrian } 3287227364Sadrian} 3288227364Sadrian 3289227364Sadrianstatic void 3290227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 3291227364Sadrian{ 3292227364Sadrian struct ieee80211_frame *wh; 3293227364Sadrian 3294227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 3295227364Sadrian /* Only update/resync if needed */ 3296227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 3297227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 3298227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3299227364Sadrian BUS_DMASYNC_PREWRITE); 3300227364Sadrian } 3301227364Sadrian sc->sc_stats.ast_tx_swretries++; 3302227364Sadrian bf->bf_state.bfs_isretried = 1; 3303227364Sadrian bf->bf_state.bfs_retries ++; 3304227364Sadrian} 3305227364Sadrian 3306227364Sadrianstatic struct ath_buf * 3307227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3308227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3309227364Sadrian{ 3310227364Sadrian struct ath_buf *nbf; 3311227364Sadrian int error; 3312227364Sadrian 3313227364Sadrian nbf = ath_buf_clone(sc, bf); 3314227364Sadrian 3315227364Sadrian#if 0 3316227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3317227364Sadrian __func__); 3318227364Sadrian#endif 3319227364Sadrian 3320227364Sadrian if (nbf == NULL) { 3321227364Sadrian /* Failed to clone */ 3322227364Sadrian device_printf(sc->sc_dev, 3323227364Sadrian "%s: failed to clone a busy buffer\n", 3324227364Sadrian __func__); 3325227364Sadrian return NULL; 3326227364Sadrian } 3327227364Sadrian 3328227364Sadrian /* Setup the dma for the new buffer */ 3329227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3330227364Sadrian if (error != 0) { 3331227364Sadrian device_printf(sc->sc_dev, 3332227364Sadrian "%s: failed to setup dma for clone\n", 3333227364Sadrian __func__); 3334227364Sadrian /* 3335227364Sadrian * Put this at the head of the list, not tail; 3336227364Sadrian * that way it doesn't interfere with the 3337227364Sadrian * busy buffer logic (which uses the tail of 3338227364Sadrian * the list.) 3339227364Sadrian */ 3340227364Sadrian ATH_TXBUF_LOCK(sc); 3341236994Sadrian ath_returnbuf_head(sc, nbf); 3342227364Sadrian ATH_TXBUF_UNLOCK(sc); 3343227364Sadrian return NULL; 3344227364Sadrian } 3345227364Sadrian 3346227398Sadrian /* Update BAW if required, before we free the original buf */ 3347227398Sadrian if (bf->bf_state.bfs_dobaw) 3348227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3349227398Sadrian 3350227364Sadrian /* Free current buffer; return the older buffer */ 3351227364Sadrian bf->bf_m = NULL; 3352227364Sadrian bf->bf_node = NULL; 3353227364Sadrian ath_freebuf(sc, bf); 3354227364Sadrian return nbf; 3355227364Sadrian} 3356227364Sadrian 3357227364Sadrian/* 3358227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3359227364Sadrian * session. 3360227364Sadrian * 3361227364Sadrian * If too many retries occur, pause the TID, wait for 3362227364Sadrian * any further retransmits (as there's no reason why 3363227364Sadrian * non-aggregate frames in an aggregate session are 3364227364Sadrian * transmitted in-order; they just have to be in-BAW) 3365227364Sadrian * and then queue a BAR. 3366227364Sadrian */ 3367227364Sadrianstatic void 3368227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3369227364Sadrian{ 3370227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3371227364Sadrian struct ath_node *an = ATH_NODE(ni); 3372227364Sadrian int tid = bf->bf_state.bfs_tid; 3373227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3374227364Sadrian struct ieee80211_tx_ampdu *tap; 3375227364Sadrian 3376227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3377227364Sadrian 3378227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3379227364Sadrian 3380227364Sadrian /* 3381227364Sadrian * If the buffer is marked as busy, we can't directly 3382227364Sadrian * reuse it. Instead, try to clone the buffer. 3383227364Sadrian * If the clone is successful, recycle the old buffer. 3384227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3385227364Sadrian * to force the next bit of code to free the buffer 3386227364Sadrian * for us. 3387227364Sadrian */ 3388227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3389227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3390227364Sadrian struct ath_buf *nbf; 3391227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3392227364Sadrian if (nbf) 3393227364Sadrian /* bf has been freed at this point */ 3394227364Sadrian bf = nbf; 3395227364Sadrian else 3396227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3397227364Sadrian } 3398227364Sadrian 3399227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3400227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3401227364Sadrian "%s: exceeded retries; seqno %d\n", 3402227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3403227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3404227364Sadrian 3405227364Sadrian /* Update BAW anyway */ 3406227364Sadrian if (bf->bf_state.bfs_dobaw) { 3407227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3408227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3409227364Sadrian device_printf(sc->sc_dev, 3410227364Sadrian "%s: wasn't added: seqno %d\n", 3411227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3412227364Sadrian } 3413227364Sadrian bf->bf_state.bfs_dobaw = 0; 3414227364Sadrian 3415233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3416233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3417227364Sadrian 3418233908Sadrian /* Send the BAR if there are no other frames waiting */ 3419233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3420233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3421227364Sadrian 3422233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3423227364Sadrian 3424227364Sadrian /* Free buffer, bf is free after this call */ 3425227364Sadrian ath_tx_default_comp(sc, bf, 0); 3426227364Sadrian return; 3427227364Sadrian } 3428227364Sadrian 3429227364Sadrian /* 3430227364Sadrian * This increments the retry counter as well as 3431227364Sadrian * sets the retry flag in the ath_buf and packet 3432227364Sadrian * body. 3433227364Sadrian */ 3434227364Sadrian ath_tx_set_retry(sc, bf); 3435227364Sadrian 3436227364Sadrian /* 3437227364Sadrian * Insert this at the head of the queue, so it's 3438227364Sadrian * retried before any current/subsequent frames. 3439227364Sadrian */ 3440227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3441227364Sadrian ath_tx_tid_sched(sc, atid); 3442233908Sadrian /* Send the BAR if there are no other frames waiting */ 3443233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3444233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3445227364Sadrian 3446227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3447227364Sadrian} 3448227364Sadrian 3449227364Sadrian/* 3450227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3451227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3452227364Sadrian * buffers. 3453227364Sadrian * 3454227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3455227364Sadrian */ 3456227364Sadrianstatic int 3457227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3458227364Sadrian ath_bufhead *bf_q) 3459227364Sadrian{ 3460227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3461227364Sadrian struct ath_node *an = ATH_NODE(ni); 3462227364Sadrian int tid = bf->bf_state.bfs_tid; 3463227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3464227364Sadrian 3465227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 3466227364Sadrian 3467240255Sadrian /* XXX clr11naggr should be done for all subframes */ 3468227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3469227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 3470227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 3471227364Sadrian 3472227364Sadrian /* 3473227364Sadrian * If the buffer is marked as busy, we can't directly 3474227364Sadrian * reuse it. Instead, try to clone the buffer. 3475227364Sadrian * If the clone is successful, recycle the old buffer. 3476227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3477227364Sadrian * to force the next bit of code to free the buffer 3478227364Sadrian * for us. 3479227364Sadrian */ 3480227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3481227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3482227364Sadrian struct ath_buf *nbf; 3483227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3484227364Sadrian if (nbf) 3485227364Sadrian /* bf has been freed at this point */ 3486227364Sadrian bf = nbf; 3487227364Sadrian else 3488227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3489227364Sadrian } 3490227364Sadrian 3491227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3492227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3493227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3494227364Sadrian "%s: max retries: seqno %d\n", 3495227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3496227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3497227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3498227364Sadrian device_printf(sc->sc_dev, 3499227364Sadrian "%s: wasn't added: seqno %d\n", 3500227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3501227364Sadrian bf->bf_state.bfs_dobaw = 0; 3502227364Sadrian return 1; 3503227364Sadrian } 3504227364Sadrian 3505227364Sadrian ath_tx_set_retry(sc, bf); 3506227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 3507227364Sadrian 3508240255Sadrian /* Clear the aggregate state */ 3509240255Sadrian bf->bf_state.bfs_aggr = 0; 3510240255Sadrian bf->bf_state.bfs_ndelim = 0; /* ??? needed? */ 3511240255Sadrian bf->bf_state.bfs_nframes = 1; 3512240255Sadrian 3513227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3514227364Sadrian return 0; 3515227364Sadrian} 3516227364Sadrian 3517227364Sadrian/* 3518227364Sadrian * error pkt completion for an aggregate destination 3519227364Sadrian */ 3520227364Sadrianstatic void 3521227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 3522227364Sadrian struct ath_tid *tid) 3523227364Sadrian{ 3524227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3525227364Sadrian struct ath_node *an = ATH_NODE(ni); 3526227364Sadrian struct ath_buf *bf_next, *bf; 3527227364Sadrian ath_bufhead bf_q; 3528227364Sadrian int drops = 0; 3529227364Sadrian struct ieee80211_tx_ampdu *tap; 3530227364Sadrian ath_bufhead bf_cq; 3531227364Sadrian 3532227364Sadrian TAILQ_INIT(&bf_q); 3533227364Sadrian TAILQ_INIT(&bf_cq); 3534227364Sadrian 3535227364Sadrian /* 3536227364Sadrian * Update rate control - all frames have failed. 3537227364Sadrian * 3538227364Sadrian * XXX use the length in the first frame in the series; 3539227364Sadrian * XXX just so things are consistent for now. 3540227364Sadrian */ 3541227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 3542227364Sadrian &bf_first->bf_status.ds_txstat, 3543227364Sadrian bf_first->bf_state.bfs_pktlen, 3544227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 3545227364Sadrian 3546227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3547227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3548227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 3549227364Sadrian 3550227364Sadrian /* Retry all subframes */ 3551227364Sadrian bf = bf_first; 3552227364Sadrian while (bf) { 3553227364Sadrian bf_next = bf->bf_next; 3554227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3555227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3556227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3557227364Sadrian drops++; 3558227364Sadrian bf->bf_next = NULL; 3559227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3560227364Sadrian } 3561227364Sadrian bf = bf_next; 3562227364Sadrian } 3563227364Sadrian 3564227364Sadrian /* Prepend all frames to the beginning of the queue */ 3565227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3566227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3567227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 3568227364Sadrian } 3569227364Sadrian 3570234725Sadrian /* 3571234725Sadrian * Schedule the TID to be re-tried. 3572234725Sadrian */ 3573227364Sadrian ath_tx_tid_sched(sc, tid); 3574227364Sadrian 3575227364Sadrian /* 3576227364Sadrian * send bar if we dropped any frames 3577227364Sadrian * 3578227364Sadrian * Keep the txq lock held for now, as we need to ensure 3579227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 3580227364Sadrian * in the ifnet TX context or raw TX context.) 3581227364Sadrian */ 3582227364Sadrian if (drops) { 3583233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3584233908Sadrian ath_tx_tid_bar_suspend(sc, tid); 3585227364Sadrian } 3586227364Sadrian 3587233908Sadrian /* 3588233908Sadrian * Send BAR if required 3589233908Sadrian */ 3590233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, tid)) 3591233908Sadrian ath_tx_tid_bar_tx(sc, tid); 3592233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3593233908Sadrian 3594227364Sadrian /* Complete frames which errored out */ 3595227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3596227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3597227364Sadrian ath_tx_default_comp(sc, bf, 0); 3598227364Sadrian } 3599227364Sadrian} 3600227364Sadrian 3601227364Sadrian/* 3602227364Sadrian * Handle clean-up of packets from an aggregate list. 3603227364Sadrian * 3604227364Sadrian * There's no need to update the BAW here - the session is being 3605227364Sadrian * torn down. 3606227364Sadrian */ 3607227364Sadrianstatic void 3608227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3609227364Sadrian{ 3610227364Sadrian struct ath_buf *bf, *bf_next; 3611227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3612227364Sadrian struct ath_node *an = ATH_NODE(ni); 3613227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3614227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3615227364Sadrian 3616227364Sadrian bf = bf_first; 3617227364Sadrian 3618227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3619227364Sadrian 3620227364Sadrian /* update incomp */ 3621227364Sadrian while (bf) { 3622227364Sadrian atid->incomp--; 3623227364Sadrian bf = bf->bf_next; 3624227364Sadrian } 3625227364Sadrian 3626227364Sadrian if (atid->incomp == 0) { 3627227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3628227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3629227364Sadrian __func__, tid); 3630227364Sadrian atid->cleanup_inprogress = 0; 3631227364Sadrian ath_tx_tid_resume(sc, atid); 3632227364Sadrian } 3633233908Sadrian 3634233908Sadrian /* Send BAR if required */ 3635233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3636233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3637227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3638227364Sadrian 3639227364Sadrian /* Handle frame completion */ 3640227364Sadrian while (bf) { 3641227364Sadrian bf_next = bf->bf_next; 3642227364Sadrian ath_tx_default_comp(sc, bf, 1); 3643227364Sadrian bf = bf_next; 3644227364Sadrian } 3645227364Sadrian} 3646227364Sadrian 3647227364Sadrian/* 3648227364Sadrian * Handle completion of an set of aggregate frames. 3649227364Sadrian * 3650227364Sadrian * XXX for now, simply complete each sub-frame. 3651227364Sadrian * 3652227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3653227364Sadrian * not the last descriptor in the first frame. 3654227364Sadrian */ 3655227364Sadrianstatic void 3656229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 3657229949Sadrian int fail) 3658227364Sadrian{ 3659227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3660227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3661227364Sadrian struct ath_node *an = ATH_NODE(ni); 3662227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3663227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3664227364Sadrian struct ath_tx_status ts; 3665227364Sadrian struct ieee80211_tx_ampdu *tap; 3666227364Sadrian ath_bufhead bf_q; 3667227364Sadrian ath_bufhead bf_cq; 3668227364Sadrian int seq_st, tx_ok; 3669227364Sadrian int hasba, isaggr; 3670227364Sadrian uint32_t ba[2]; 3671227364Sadrian struct ath_buf *bf, *bf_next; 3672227364Sadrian int ba_index; 3673227364Sadrian int drops = 0; 3674227364Sadrian int nframes = 0, nbad = 0, nf; 3675227364Sadrian int pktlen; 3676227364Sadrian /* XXX there's too much on the stack? */ 3677236038Sadrian struct ath_rc_series rc[ATH_RC_NUM]; 3678227364Sadrian int txseq; 3679227364Sadrian 3680227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3681227364Sadrian __func__, atid->hwq_depth); 3682227364Sadrian 3683227364Sadrian /* The TID state is kept behind the TXQ lock */ 3684227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3685227364Sadrian 3686227364Sadrian atid->hwq_depth--; 3687227364Sadrian if (atid->hwq_depth < 0) 3688227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3689227364Sadrian __func__, atid->hwq_depth); 3690227364Sadrian 3691227364Sadrian /* 3692227364Sadrian * Punt cleanup to the relevant function, not our problem now 3693227364Sadrian */ 3694227364Sadrian if (atid->cleanup_inprogress) { 3695227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3696227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3697227364Sadrian return; 3698227364Sadrian } 3699227364Sadrian 3700227364Sadrian /* 3701227364Sadrian * Take a copy; this may be needed -after- bf_first 3702227364Sadrian * has been completed and freed. 3703227364Sadrian */ 3704227364Sadrian ts = bf_first->bf_status.ds_txstat; 3705227364Sadrian /* 3706227364Sadrian * XXX for now, use the first frame in the aggregate for 3707227364Sadrian * XXX rate control completion; it's at least consistent. 3708227364Sadrian */ 3709227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3710227364Sadrian 3711227364Sadrian /* 3712235461Sadrian * Handle errors first! 3713235461Sadrian * 3714235461Sadrian * Here, handle _any_ error as a "exceeded retries" error. 3715235461Sadrian * Later on (when filtered frames are to be specially handled) 3716235461Sadrian * it'll have to be expanded. 3717227364Sadrian */ 3718235461Sadrian#if 0 3719227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3720235461Sadrian#endif 3721235461Sadrian if (ts.ts_status != 0) { 3722227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3723227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3724227364Sadrian return; 3725227364Sadrian } 3726227364Sadrian 3727227364Sadrian TAILQ_INIT(&bf_q); 3728227364Sadrian TAILQ_INIT(&bf_cq); 3729227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3730227364Sadrian 3731227364Sadrian /* 3732227364Sadrian * extract starting sequence and block-ack bitmap 3733227364Sadrian */ 3734227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3735227364Sadrian seq_st = ts.ts_seqnum; 3736227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3737227364Sadrian tx_ok = (ts.ts_status == 0); 3738227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3739227364Sadrian ba[0] = ts.ts_ba_low; 3740227364Sadrian ba[1] = ts.ts_ba_high; 3741227364Sadrian 3742227364Sadrian /* 3743227364Sadrian * Copy the TX completion status and the rate control 3744227364Sadrian * series from the first descriptor, as it may be freed 3745227364Sadrian * before the rate control code can get its grubby fingers 3746227364Sadrian * into things. 3747227364Sadrian */ 3748227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3749227364Sadrian 3750227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3751229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 3752229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3753227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3754227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3755227364Sadrian 3756227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3757227364Sadrian if (tid != ts.ts_tid) { 3758227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3759227364Sadrian __func__, tid, ts.ts_tid); 3760227364Sadrian tx_ok = 0; 3761227364Sadrian } 3762227364Sadrian 3763227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3764227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3765227364Sadrian device_printf(sc->sc_dev, 3766229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 3767229949Sadrian "seq_st=%d\n", 3768227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3769227364Sadrian /* XXX TODO: schedule an interface reset */ 3770238350Sjhb#ifdef ATH_DEBUG 3771238338Sadrian ath_printtxbuf(sc, bf_first, 3772238338Sadrian sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0); 3773238350Sjhb#endif 3774227364Sadrian } 3775227364Sadrian 3776227364Sadrian /* 3777227364Sadrian * Walk the list of frames, figure out which ones were correctly 3778227364Sadrian * sent and which weren't. 3779227364Sadrian */ 3780227364Sadrian bf = bf_first; 3781227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3782227364Sadrian 3783227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3784227364Sadrian bf_first = NULL; 3785227364Sadrian 3786227364Sadrian /* 3787227364Sadrian * Walk the list of completed frames and determine 3788227364Sadrian * which need to be completed and which need to be 3789227364Sadrian * retransmitted. 3790227364Sadrian * 3791227364Sadrian * For completed frames, the completion functions need 3792227364Sadrian * to be called at the end of this function as the last 3793227364Sadrian * node reference may free the node. 3794227364Sadrian * 3795227364Sadrian * Finally, since the TXQ lock can't be held during the 3796227364Sadrian * completion callback (to avoid lock recursion), 3797227364Sadrian * the completion calls have to be done outside of the 3798227364Sadrian * lock. 3799227364Sadrian */ 3800227364Sadrian while (bf) { 3801227364Sadrian nframes++; 3802229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 3803229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3804227364Sadrian bf_next = bf->bf_next; 3805227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3806227364Sadrian 3807227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3808227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3809227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3810227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3811227364Sadrian 3812227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3813227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 3814227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3815227364Sadrian bf->bf_state.bfs_dobaw = 0; 3816227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3817227364Sadrian device_printf(sc->sc_dev, 3818227364Sadrian "%s: wasn't added: seqno %d\n", 3819227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3820227364Sadrian bf->bf_next = NULL; 3821227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3822227364Sadrian } else { 3823227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3824227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3825227364Sadrian drops++; 3826227364Sadrian bf->bf_next = NULL; 3827227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3828227364Sadrian } 3829227364Sadrian nbad++; 3830227364Sadrian } 3831227364Sadrian bf = bf_next; 3832227364Sadrian } 3833227364Sadrian 3834227364Sadrian /* 3835227364Sadrian * Now that the BAW updates have been done, unlock 3836227364Sadrian * 3837227364Sadrian * txseq is grabbed before the lock is released so we 3838227364Sadrian * have a consistent view of what -was- in the BAW. 3839227364Sadrian * Anything after this point will not yet have been 3840227364Sadrian * TXed. 3841227364Sadrian */ 3842227364Sadrian txseq = tap->txa_start; 3843227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3844227364Sadrian 3845227364Sadrian if (nframes != nf) 3846227364Sadrian device_printf(sc->sc_dev, 3847227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3848227364Sadrian __func__, nframes, nf); 3849227364Sadrian 3850227364Sadrian /* 3851227364Sadrian * Now we know how many frames were bad, call the rate 3852227364Sadrian * control code. 3853227364Sadrian */ 3854227364Sadrian if (fail == 0) 3855229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 3856229949Sadrian nbad); 3857227364Sadrian 3858227364Sadrian /* 3859227364Sadrian * send bar if we dropped any frames 3860227364Sadrian */ 3861227364Sadrian if (drops) { 3862233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3863233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3864233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3865233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3866227364Sadrian } 3867227364Sadrian 3868234725Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3869234725Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3870234725Sadrian 3871234725Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3872234725Sadrian 3873227364Sadrian /* Prepend all frames to the beginning of the queue */ 3874227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3875227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3876227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3877227364Sadrian } 3878234725Sadrian 3879234725Sadrian /* 3880234725Sadrian * Reschedule to grab some further frames. 3881234725Sadrian */ 3882227364Sadrian ath_tx_tid_sched(sc, atid); 3883227364Sadrian 3884233908Sadrian /* 3885233908Sadrian * Send BAR if required 3886233908Sadrian */ 3887233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3888233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3889234725Sadrian 3890233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3891233908Sadrian 3892227364Sadrian /* Do deferred completion */ 3893227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3894227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3895227364Sadrian ath_tx_default_comp(sc, bf, 0); 3896227364Sadrian } 3897227364Sadrian} 3898227364Sadrian 3899227364Sadrian/* 3900227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3901227364Sadrian * session. 3902227364Sadrian * 3903227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3904227364Sadrian * ath_tx_draintxq(). 3905227364Sadrian */ 3906227364Sadrianstatic void 3907227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3908227364Sadrian{ 3909227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3910227364Sadrian struct ath_node *an = ATH_NODE(ni); 3911227364Sadrian int tid = bf->bf_state.bfs_tid; 3912227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3913227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3914227364Sadrian 3915227364Sadrian /* 3916227364Sadrian * Update rate control status here, before we possibly 3917227364Sadrian * punt to retry or cleanup. 3918227364Sadrian * 3919227364Sadrian * Do it outside of the TXQ lock. 3920227364Sadrian */ 3921233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3922227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3923227364Sadrian &bf->bf_status.ds_txstat, 3924227364Sadrian bf->bf_state.bfs_pktlen, 3925227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3926227364Sadrian 3927227364Sadrian /* 3928227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3929227364Sadrian * This unfortunately means that it's released and regrabbed 3930227364Sadrian * during retry and cleanup. That's rather inefficient. 3931227364Sadrian */ 3932227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3933227364Sadrian 3934227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3935227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3936227364Sadrian 3937229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 3938229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 3939229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 3940229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3941227364Sadrian 3942227364Sadrian atid->hwq_depth--; 3943227364Sadrian if (atid->hwq_depth < 0) 3944227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3945227364Sadrian __func__, atid->hwq_depth); 3946227364Sadrian 3947227364Sadrian /* 3948227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3949227364Sadrian * rather than handling it here. It's thus their 3950227364Sadrian * responsibility to clean up, call the completion 3951227364Sadrian * function in net80211, etc. 3952227364Sadrian */ 3953227364Sadrian if (atid->cleanup_inprogress) { 3954227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3955229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 3956229949Sadrian __func__); 3957227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3958227364Sadrian return; 3959227364Sadrian } 3960227364Sadrian 3961227364Sadrian /* 3962227364Sadrian * Don't bother with the retry check if all frames 3963227364Sadrian * are being failed (eg during queue deletion.) 3964227364Sadrian */ 3965235461Sadrian#if 0 3966227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3967235461Sadrian#endif 3968235461Sadrian if (fail == 0 && ts->ts_status != 0) { 3969227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3970229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 3971229949Sadrian __func__); 3972227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3973227364Sadrian return; 3974227364Sadrian } 3975227364Sadrian 3976227364Sadrian /* Success? Complete */ 3977227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3978227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3979227364Sadrian if (bf->bf_state.bfs_dobaw) { 3980227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3981227364Sadrian bf->bf_state.bfs_dobaw = 0; 3982227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3983227364Sadrian device_printf(sc->sc_dev, 3984227364Sadrian "%s: wasn't added: seqno %d\n", 3985227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3986227364Sadrian } 3987227364Sadrian 3988233908Sadrian /* 3989233908Sadrian * Send BAR if required 3990233908Sadrian */ 3991233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3992233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3993233908Sadrian 3994227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3995227364Sadrian 3996227364Sadrian ath_tx_default_comp(sc, bf, fail); 3997227364Sadrian /* bf is freed at this point */ 3998227364Sadrian} 3999227364Sadrian 4000227364Sadrianvoid 4001227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 4002227364Sadrian{ 4003227364Sadrian if (bf->bf_state.bfs_aggr) 4004227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 4005227364Sadrian else 4006227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 4007227364Sadrian} 4008227364Sadrian 4009227364Sadrian/* 4010227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4011227364Sadrian * 4012227364Sadrian * This is the aggregate version. 4013227364Sadrian */ 4014227364Sadrianvoid 4015227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 4016227364Sadrian struct ath_tid *tid) 4017227364Sadrian{ 4018227364Sadrian struct ath_buf *bf; 4019227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4020227364Sadrian struct ieee80211_tx_ampdu *tap; 4021227364Sadrian ATH_AGGR_STATUS status; 4022227364Sadrian ath_bufhead bf_q; 4023227364Sadrian 4024227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 4025227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4026227364Sadrian 4027227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 4028227364Sadrian 4029227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 4030227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 4031227364Sadrian __func__); 4032227364Sadrian 4033227364Sadrian for (;;) { 4034227364Sadrian status = ATH_AGGR_DONE; 4035227364Sadrian 4036227364Sadrian /* 4037227364Sadrian * If the upper layer has paused the TID, don't 4038227364Sadrian * queue any further packets. 4039227364Sadrian * 4040227364Sadrian * This can also occur from the completion task because 4041227364Sadrian * of packet loss; but as its serialised with this code, 4042227364Sadrian * it won't "appear" half way through queuing packets. 4043227364Sadrian */ 4044227364Sadrian if (tid->paused) 4045227364Sadrian break; 4046227364Sadrian 4047227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 4048227364Sadrian if (bf == NULL) { 4049227364Sadrian break; 4050227364Sadrian } 4051227364Sadrian 4052227364Sadrian /* 4053227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 4054227364Sadrian * data frame), schedule it directly; continue. 4055227364Sadrian */ 4056227364Sadrian if (! bf->bf_state.bfs_dobaw) { 4057229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4058229949Sadrian "%s: non-baw packet\n", 4059227364Sadrian __func__); 4060227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 4061240180Sadrian 4062240180Sadrian if (bf->bf_state.bfs_nframes > 1) 4063240180Sadrian device_printf(sc->sc_dev, 4064240180Sadrian "%s: aggr=%d, nframes=%d\n", 4065240180Sadrian __func__, 4066240180Sadrian bf->bf_state.bfs_aggr, 4067240180Sadrian bf->bf_state.bfs_nframes); 4068240180Sadrian 4069240180Sadrian /* 4070240180Sadrian * This shouldn't happen - such frames shouldn't 4071240180Sadrian * ever have been queued as an aggregate in the 4072240180Sadrian * first place. However, make sure the fields 4073240180Sadrian * are correctly setup just to be totally sure. 4074240180Sadrian */ 4075227364Sadrian bf->bf_state.bfs_aggr = 0; 4076240180Sadrian bf->bf_state.bfs_nframes = 1; 4077240180Sadrian 4078227364Sadrian ath_tx_do_ratelookup(sc, bf); 4079233989Sadrian ath_tx_calc_duration(sc, bf); 4080233989Sadrian ath_tx_calc_protection(sc, bf); 4081233989Sadrian ath_tx_set_rtscts(sc, bf); 4082227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4083227364Sadrian ath_tx_setds(sc, bf); 4084227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4085227364Sadrian 4086227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 4087227364Sadrian 4088227364Sadrian /* Queue the packet; continue */ 4089227364Sadrian goto queuepkt; 4090227364Sadrian } 4091227364Sadrian 4092227364Sadrian TAILQ_INIT(&bf_q); 4093227364Sadrian 4094227364Sadrian /* 4095227364Sadrian * Do a rate control lookup on the first frame in the 4096227364Sadrian * list. The rate control code needs that to occur 4097227364Sadrian * before it can determine whether to TX. 4098227364Sadrian * It's inaccurate because the rate control code doesn't 4099227364Sadrian * really "do" aggregate lookups, so it only considers 4100227364Sadrian * the size of the first frame. 4101227364Sadrian */ 4102227364Sadrian ath_tx_do_ratelookup(sc, bf); 4103227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 4104227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 4105233989Sadrian 4106233989Sadrian ath_tx_calc_duration(sc, bf); 4107233989Sadrian ath_tx_calc_protection(sc, bf); 4108233989Sadrian 4109233989Sadrian ath_tx_set_rtscts(sc, bf); 4110227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4111227364Sadrian 4112227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 4113227364Sadrian 4114227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4115227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 4116227364Sadrian 4117227364Sadrian /* 4118227364Sadrian * No frames to be picked up - out of BAW 4119227364Sadrian */ 4120227364Sadrian if (TAILQ_EMPTY(&bf_q)) 4121227364Sadrian break; 4122227364Sadrian 4123227364Sadrian /* 4124227364Sadrian * This assumes that the descriptor list in the ath_bufhead 4125227364Sadrian * are already linked together via bf_next pointers. 4126227364Sadrian */ 4127227364Sadrian bf = TAILQ_FIRST(&bf_q); 4128227364Sadrian 4129233989Sadrian if (status == ATH_AGGR_8K_LIMITED) 4130233989Sadrian sc->sc_aggr_stats.aggr_rts_aggr_limited++; 4131233989Sadrian 4132227364Sadrian /* 4133227364Sadrian * If it's the only frame send as non-aggregate 4134227364Sadrian * assume that ath_tx_form_aggr() has checked 4135227364Sadrian * whether it's in the BAW and added it appropriately. 4136227364Sadrian */ 4137227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 4138227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4139227364Sadrian "%s: single-frame aggregate\n", __func__); 4140227364Sadrian bf->bf_state.bfs_aggr = 0; 4141240255Sadrian bf->bf_state.bfs_ndelim = 0; 4142227364Sadrian ath_tx_setds(sc, bf); 4143227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4144227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 4145227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 4146227364Sadrian else 4147227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 4148227364Sadrian } else { 4149227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4150229949Sadrian "%s: multi-frame aggregate: %d frames, " 4151229949Sadrian "length %d\n", 4152227364Sadrian __func__, bf->bf_state.bfs_nframes, 4153227364Sadrian bf->bf_state.bfs_al); 4154227364Sadrian bf->bf_state.bfs_aggr = 1; 4155227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 4156227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 4157227364Sadrian 4158227364Sadrian /* 4159233989Sadrian * Calculate the duration/protection as required. 4160233989Sadrian */ 4161233989Sadrian ath_tx_calc_duration(sc, bf); 4162233989Sadrian ath_tx_calc_protection(sc, bf); 4163233989Sadrian 4164233989Sadrian /* 4165227364Sadrian * Update the rate and rtscts information based on the 4166227364Sadrian * rate decision made by the rate control code; 4167227364Sadrian * the first frame in the aggregate needs it. 4168227364Sadrian */ 4169227364Sadrian ath_tx_set_rtscts(sc, bf); 4170227364Sadrian 4171227364Sadrian /* 4172227364Sadrian * Setup the relevant descriptor fields 4173227364Sadrian * for aggregation. The first descriptor 4174227364Sadrian * already points to the rest in the chain. 4175227364Sadrian */ 4176227364Sadrian ath_tx_setds_11n(sc, bf); 4177227364Sadrian 4178227364Sadrian } 4179227364Sadrian queuepkt: 4180227364Sadrian //txq = bf->bf_state.bfs_txq; 4181227364Sadrian 4182227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 4183227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 4184227364Sadrian 4185227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 4186227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 4187227364Sadrian 4188227364Sadrian /* Punt to txq */ 4189227364Sadrian ath_tx_handoff(sc, txq, bf); 4190227364Sadrian 4191227364Sadrian /* Track outstanding buffer count to hardware */ 4192227364Sadrian /* aggregates are "one" buffer */ 4193227364Sadrian tid->hwq_depth++; 4194227364Sadrian 4195227364Sadrian /* 4196227364Sadrian * Break out if ath_tx_form_aggr() indicated 4197227364Sadrian * there can't be any further progress (eg BAW is full.) 4198227364Sadrian * Checking for an empty txq is done above. 4199227364Sadrian * 4200227364Sadrian * XXX locking on txq here? 4201227364Sadrian */ 4202227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 4203227364Sadrian status == ATH_AGGR_BAW_CLOSED) 4204227364Sadrian break; 4205227364Sadrian } 4206227364Sadrian} 4207227364Sadrian 4208227364Sadrian/* 4209227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4210227364Sadrian */ 4211227364Sadrianvoid 4212227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 4213227364Sadrian struct ath_tid *tid) 4214227364Sadrian{ 4215227364Sadrian struct ath_buf *bf; 4216227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4217227364Sadrian 4218227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 4219227364Sadrian __func__, an, tid->tid); 4220227364Sadrian 4221227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4222227364Sadrian 4223227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 4224227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 4225227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 4226227364Sadrian __func__, tid->tid); 4227227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 4228227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 4229227364Sadrian __func__, tid->tid); 4230227364Sadrian 4231227364Sadrian for (;;) { 4232227364Sadrian 4233227364Sadrian /* 4234227364Sadrian * If the upper layers have paused the TID, don't 4235227364Sadrian * queue any further packets. 4236227364Sadrian */ 4237227364Sadrian if (tid->paused) 4238227364Sadrian break; 4239227364Sadrian 4240227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 4241227364Sadrian if (bf == NULL) { 4242227364Sadrian break; 4243227364Sadrian } 4244227364Sadrian 4245227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 4246227364Sadrian 4247227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 4248227364Sadrian 4249227364Sadrian /* Sanity check! */ 4250227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 4251227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 4252227364Sadrian " tid %d\n", 4253227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 4254227364Sadrian } 4255227364Sadrian /* Normal completion handler */ 4256227364Sadrian bf->bf_comp = ath_tx_normal_comp; 4257227364Sadrian 4258227364Sadrian /* Program descriptors + rate control */ 4259227364Sadrian ath_tx_do_ratelookup(sc, bf); 4260233989Sadrian ath_tx_calc_duration(sc, bf); 4261233989Sadrian ath_tx_calc_protection(sc, bf); 4262233989Sadrian ath_tx_set_rtscts(sc, bf); 4263227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4264227364Sadrian ath_tx_setds(sc, bf); 4265227364Sadrian 4266227364Sadrian /* Track outstanding buffer count to hardware */ 4267227364Sadrian /* aggregates are "one" buffer */ 4268227364Sadrian tid->hwq_depth++; 4269227364Sadrian 4270227364Sadrian /* Punt to hardware or software txq */ 4271227364Sadrian ath_tx_handoff(sc, txq, bf); 4272227364Sadrian } 4273227364Sadrian} 4274227364Sadrian 4275227364Sadrian/* 4276227364Sadrian * Schedule some packets to the given hardware queue. 4277227364Sadrian * 4278227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 4279227364Sadrian * with queued traffic) and attempts to schedule traffic 4280227364Sadrian * from them. 4281227364Sadrian * 4282227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 4283227364Sadrian * added to the end of the queue after some frames have been 4284227364Sadrian * scheduled. 4285227364Sadrian */ 4286227364Sadrianvoid 4287227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 4288227364Sadrian{ 4289227364Sadrian struct ath_tid *tid, *next, *last; 4290227364Sadrian 4291227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4292227364Sadrian 4293227364Sadrian /* 4294227364Sadrian * Don't schedule if the hardware queue is busy. 4295227364Sadrian * This (hopefully) gives some more time to aggregate 4296227364Sadrian * some packets in the aggregation queue. 4297227364Sadrian */ 4298227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4299227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 4300227364Sadrian return; 4301227364Sadrian } 4302227364Sadrian 4303227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 4304227364Sadrian 4305227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 4306227364Sadrian /* 4307227364Sadrian * Suspend paused queues here; they'll be resumed 4308227364Sadrian * once the addba completes or times out. 4309227364Sadrian */ 4310227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 4311227364Sadrian __func__, tid->tid, tid->paused); 4312227364Sadrian ath_tx_tid_unsched(sc, tid); 4313227364Sadrian if (tid->paused) { 4314227364Sadrian continue; 4315227364Sadrian } 4316227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 4317227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 4318227364Sadrian else 4319227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 4320227364Sadrian 4321227364Sadrian /* Not empty? Re-schedule */ 4322227364Sadrian if (tid->axq_depth != 0) 4323227364Sadrian ath_tx_tid_sched(sc, tid); 4324227364Sadrian 4325227364Sadrian /* Give the software queue time to aggregate more packets */ 4326227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4327227364Sadrian break; 4328227364Sadrian } 4329227364Sadrian 4330227364Sadrian /* 4331227364Sadrian * If this was the last entry on the original list, stop. 4332227364Sadrian * Otherwise nodes that have been rescheduled onto the end 4333227364Sadrian * of the TID FIFO list will just keep being rescheduled. 4334227364Sadrian */ 4335227364Sadrian if (tid == last) 4336227364Sadrian break; 4337227364Sadrian } 4338227364Sadrian} 4339227364Sadrian 4340227364Sadrian/* 4341227364Sadrian * TX addba handling 4342227364Sadrian */ 4343227364Sadrian 4344227364Sadrian/* 4345227364Sadrian * Return net80211 TID struct pointer, or NULL for none 4346227364Sadrian */ 4347227364Sadrianstruct ieee80211_tx_ampdu * 4348227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 4349227364Sadrian{ 4350227364Sadrian struct ieee80211_node *ni = &an->an_node; 4351227364Sadrian struct ieee80211_tx_ampdu *tap; 4352227364Sadrian 4353227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4354227364Sadrian return NULL; 4355227364Sadrian 4356234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 4357227364Sadrian return tap; 4358227364Sadrian} 4359227364Sadrian 4360227364Sadrian/* 4361227364Sadrian * Is AMPDU-TX running? 4362227364Sadrian */ 4363227364Sadrianstatic int 4364227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 4365227364Sadrian{ 4366227364Sadrian struct ieee80211_tx_ampdu *tap; 4367227364Sadrian 4368227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4369227364Sadrian return 0; 4370227364Sadrian 4371227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4372227364Sadrian if (tap == NULL) 4373227364Sadrian return 0; /* Not valid; default to not running */ 4374227364Sadrian 4375227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 4376227364Sadrian} 4377227364Sadrian 4378227364Sadrian/* 4379227364Sadrian * Is AMPDU-TX negotiation pending? 4380227364Sadrian */ 4381227364Sadrianstatic int 4382227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 4383227364Sadrian{ 4384227364Sadrian struct ieee80211_tx_ampdu *tap; 4385227364Sadrian 4386227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4387227364Sadrian return 0; 4388227364Sadrian 4389227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4390227364Sadrian if (tap == NULL) 4391227364Sadrian return 0; /* Not valid; default to not pending */ 4392227364Sadrian 4393227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 4394227364Sadrian} 4395227364Sadrian 4396227364Sadrian/* 4397227364Sadrian * Is AMPDU-TX pending for the given TID? 4398227364Sadrian */ 4399227364Sadrian 4400227364Sadrian 4401227364Sadrian/* 4402227364Sadrian * Method to handle sending an ADDBA request. 4403227364Sadrian * 4404227364Sadrian * We tap this so the relevant flags can be set to pause the TID 4405227364Sadrian * whilst waiting for the response. 4406227364Sadrian * 4407227364Sadrian * XXX there's no timeout handler we can override? 4408227364Sadrian */ 4409227364Sadrianint 4410227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4411227364Sadrian int dialogtoken, int baparamset, int batimeout) 4412227364Sadrian{ 4413227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4414234324Sadrian int tid = tap->txa_tid; 4415227364Sadrian struct ath_node *an = ATH_NODE(ni); 4416227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4417227364Sadrian 4418227364Sadrian /* 4419227364Sadrian * XXX danger Will Robinson! 4420227364Sadrian * 4421227364Sadrian * Although the taskqueue may be running and scheduling some more 4422227364Sadrian * packets, these should all be _before_ the addba sequence number. 4423227364Sadrian * However, net80211 will keep self-assigning sequence numbers 4424227364Sadrian * until addba has been negotiated. 4425227364Sadrian * 4426227364Sadrian * In the past, these packets would be "paused" (which still works 4427227364Sadrian * fine, as they're being scheduled to the driver in the same 4428227364Sadrian * serialised method which is calling the addba request routine) 4429227364Sadrian * and when the aggregation session begins, they'll be dequeued 4430227364Sadrian * as aggregate packets and added to the BAW. However, now there's 4431227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 4432227364Sadrian * packets. Thus they never get included in the BAW tracking and 4433227364Sadrian * this can cause the initial burst of packets after the addba 4434227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 4435227364Sadrian * 4436227364Sadrian * The "eventual" solution should be to tag these packets with 4437227364Sadrian * dobaw. Although net80211 has given us a sequence number, 4438227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 4439227364Sadrian * fall within it. 4440227364Sadrian */ 4441235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4442235774Sadrian /* 4443235774Sadrian * This is a bit annoying. Until net80211 HT code inherits some 4444235774Sadrian * (any) locking, we may have this called in parallel BUT only 4445235774Sadrian * one response/timeout will be called. Grr. 4446235774Sadrian */ 4447235774Sadrian if (atid->addba_tx_pending == 0) { 4448235774Sadrian ath_tx_tid_pause(sc, atid); 4449235774Sadrian atid->addba_tx_pending = 1; 4450235774Sadrian } 4451235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4452227364Sadrian 4453227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4454227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 4455227364Sadrian __func__, dialogtoken, baparamset, batimeout); 4456227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4457227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4458227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4459227364Sadrian 4460227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 4461227364Sadrian batimeout); 4462227364Sadrian} 4463227364Sadrian 4464227364Sadrian/* 4465227364Sadrian * Handle an ADDBA response. 4466227364Sadrian * 4467227364Sadrian * We unpause the queue so TX'ing can resume. 4468227364Sadrian * 4469227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 4470227364Sadrian * aggregate or not) so the BAW is updated. 4471227364Sadrian * 4472227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 4473227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 4474227364Sadrian * edge won't match the ni->ni_txseq. 4475227364Sadrian * 4476227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 4477227364Sadrian * ni->ni_txseq. 4478227364Sadrian * 4479227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 4480227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 4481227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 4482227364Sadrian * window. 4483227364Sadrian */ 4484227364Sadrianint 4485227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4486227364Sadrian int status, int code, int batimeout) 4487227364Sadrian{ 4488227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4489234324Sadrian int tid = tap->txa_tid; 4490227364Sadrian struct ath_node *an = ATH_NODE(ni); 4491227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4492227364Sadrian int r; 4493227364Sadrian 4494227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4495227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 4496227364Sadrian status, code, batimeout); 4497227364Sadrian 4498227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4499227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4500227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4501227364Sadrian 4502227364Sadrian /* 4503227364Sadrian * Call this first, so the interface flags get updated 4504227364Sadrian * before the TID is unpaused. Otherwise a race condition 4505227364Sadrian * exists where the unpaused TID still doesn't yet have 4506227364Sadrian * IEEE80211_AGGR_RUNNING set. 4507227364Sadrian */ 4508227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 4509227364Sadrian 4510227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4511235774Sadrian atid->addba_tx_pending = 0; 4512227364Sadrian /* 4513227364Sadrian * XXX dirty! 4514227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 4515227364Sadrian * Read above for more information. 4516227364Sadrian */ 4517227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 4518227364Sadrian ath_tx_tid_resume(sc, atid); 4519227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4520227364Sadrian return r; 4521227364Sadrian} 4522227364Sadrian 4523227364Sadrian 4524227364Sadrian/* 4525227364Sadrian * Stop ADDBA on a queue. 4526237593Sadrian * 4527237593Sadrian * This can be called whilst BAR TX is currently active on the queue, 4528237593Sadrian * so make sure this is unblocked before continuing. 4529227364Sadrian */ 4530227364Sadrianvoid 4531227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 4532227364Sadrian{ 4533227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4534234324Sadrian int tid = tap->txa_tid; 4535227364Sadrian struct ath_node *an = ATH_NODE(ni); 4536227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4537227364Sadrian 4538227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 4539227364Sadrian 4540237593Sadrian /* 4541237593Sadrian * Pause TID traffic early, so there aren't any races 4542237593Sadrian * Unblock the pending BAR held traffic, if it's currently paused. 4543237593Sadrian */ 4544235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4545227364Sadrian ath_tx_tid_pause(sc, atid); 4546237593Sadrian if (atid->bar_wait) { 4547237593Sadrian /* 4548237593Sadrian * bar_unsuspend() expects bar_tx == 1, as it should be 4549237593Sadrian * called from the TX completion path. This quietens 4550237593Sadrian * the warning. It's cleared for us anyway. 4551237593Sadrian */ 4552237593Sadrian atid->bar_tx = 1; 4553237593Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4554237593Sadrian } 4555235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4556227364Sadrian 4557227364Sadrian /* There's no need to hold the TXQ lock here */ 4558227364Sadrian sc->sc_addba_stop(ni, tap); 4559227364Sadrian 4560227364Sadrian /* 4561235749Sadrian * ath_tx_tid_cleanup will resume the TID if possible, otherwise 4562227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 4563227364Sadrian * things have been cleaned up. 4564227364Sadrian */ 4565235749Sadrian ath_tx_tid_cleanup(sc, an, tid); 4566227364Sadrian} 4567227364Sadrian 4568227364Sadrian/* 4569227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 4570227364Sadrian * it simply tears down the aggregation session. Ew. 4571227364Sadrian * 4572227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 4573227364Sadrian * ic->ic_addba_stop(). 4574227364Sadrian * 4575227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 4576227364Sadrian * XXX BAR TX success or failure should be better handled! 4577227364Sadrian */ 4578227364Sadrianvoid 4579227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4580227364Sadrian int status) 4581227364Sadrian{ 4582227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4583234324Sadrian int tid = tap->txa_tid; 4584227364Sadrian struct ath_node *an = ATH_NODE(ni); 4585227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4586227364Sadrian int attempts = tap->txa_attempts; 4587227364Sadrian 4588235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 4589235676Sadrian "%s: called; tap=%p, atid=%p, txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n", 4590235491Sadrian __func__, 4591235676Sadrian tap, 4592235676Sadrian atid, 4593235676Sadrian tap->txa_tid, 4594235676Sadrian atid->tid, 4595235491Sadrian status, 4596235491Sadrian attempts); 4597227364Sadrian 4598227364Sadrian /* Note: This may update the BAW details */ 4599227364Sadrian sc->sc_bar_response(ni, tap, status); 4600227364Sadrian 4601227364Sadrian /* Unpause the TID */ 4602227364Sadrian /* 4603227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 4604227364Sadrian * XXX to a non-aggregate session. So we must unpause the 4605227364Sadrian * XXX TID here or it'll never be done. 4606227364Sadrian */ 4607227364Sadrian if (status == 0 || attempts == 50) { 4608227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4609233908Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4610227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4611227364Sadrian } 4612227364Sadrian} 4613227364Sadrian 4614227364Sadrian/* 4615227364Sadrian * This is called whenever the pending ADDBA request times out. 4616227364Sadrian * Unpause and reschedule the TID. 4617227364Sadrian */ 4618227364Sadrianvoid 4619227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 4620227364Sadrian struct ieee80211_tx_ampdu *tap) 4621227364Sadrian{ 4622227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4623234324Sadrian int tid = tap->txa_tid; 4624227364Sadrian struct ath_node *an = ATH_NODE(ni); 4625227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4626227364Sadrian 4627227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4628227364Sadrian "%s: called; resuming\n", __func__); 4629227364Sadrian 4630235774Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4631235774Sadrian atid->addba_tx_pending = 0; 4632235774Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4633235774Sadrian 4634227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 4635227364Sadrian sc->sc_addba_response_timeout(ni, tap); 4636227364Sadrian 4637227364Sadrian /* Unpause the TID; which reschedules it */ 4638227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4639227364Sadrian ath_tx_tid_resume(sc, atid); 4640227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4641227364Sadrian} 4642238710Sadrian 4643238710Sadrianstatic int 4644238710Sadrianath_legacy_dma_txsetup(struct ath_softc *sc) 4645238710Sadrian{ 4646238710Sadrian 4647238710Sadrian /* nothing new needed */ 4648238710Sadrian return (0); 4649238710Sadrian} 4650238710Sadrian 4651238710Sadrianstatic int 4652238710Sadrianath_legacy_dma_txteardown(struct ath_softc *sc) 4653238710Sadrian{ 4654238710Sadrian 4655238710Sadrian /* nothing new needed */ 4656238710Sadrian return (0); 4657238710Sadrian} 4658238710Sadrian 4659238710Sadrianvoid 4660238710Sadrianath_xmit_setup_legacy(struct ath_softc *sc) 4661238710Sadrian{ 4662238729Sadrian /* 4663238729Sadrian * For now, just set the descriptor length to sizeof(ath_desc); 4664238729Sadrian * worry about extracting the real length out of the HAL later. 4665238729Sadrian */ 4666238729Sadrian sc->sc_tx_desclen = sizeof(struct ath_desc); 4667238729Sadrian sc->sc_tx_statuslen = 0; 4668238729Sadrian sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */ 4669238710Sadrian 4670238710Sadrian sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup; 4671238710Sadrian sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown; 4672238931Sadrian sc->sc_tx.xmit_attach_comp_func = ath_legacy_attach_comp_func; 4673238930Sadrian 4674238930Sadrian sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart; 4675238930Sadrian sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff; 4676239204Sadrian 4677239204Sadrian sc->sc_tx.xmit_drain = ath_legacy_tx_drain; 4678238710Sadrian} 4679