if_ath_tx.c revision 239198
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 239198 2012-08-11 22:25:28Z 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; 304218065Sadrian struct ath_desc *ds, *ds0; 305218065Sadrian int i; 306239051Sadrian HAL_DMA_ADDR bufAddrList[4]; 307239051Sadrian uint32_t segLenList[4]; 308239051Sadrian 309238708Sadrian /* 310238708Sadrian * XXX There's txdma and txdma_mgmt; the descriptor 311238708Sadrian * sizes must match. 312238708Sadrian */ 313238708Sadrian struct ath_descdma *dd = &sc->sc_txdma; 314218065Sadrian 315218065Sadrian /* 316218065Sadrian * Fillin the remainder of the descriptor info. 317218065Sadrian */ 318218065Sadrian ds0 = ds = bf->bf_desc; 319218065Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 320239051Sadrian bufAddrList[0] = bf->bf_segs[i].ds_addr; 321239051Sadrian segLenList[0] = bf->bf_segs[i].ds_len; 322239051Sadrian 323239051Sadrian /* Blank this out until multi-buf support is added for AR9300 */ 324239051Sadrian bufAddrList[1] = bufAddrList[2] = bufAddrList[3] = 0; 325239051Sadrian segLenList[1] = segLenList[2] = segLenList[3] = 0; 326239051Sadrian 327218065Sadrian if (i == bf->bf_nseg - 1) 328238609Sadrian ath_hal_settxdesclink(ah, ds, 0); 329218065Sadrian else 330238609Sadrian ath_hal_settxdesclink(ah, ds, 331238708Sadrian bf->bf_daddr + dd->dd_descsize * (i + 1)); 332239051Sadrian 333239051Sadrian /* 334239051Sadrian * XXX this assumes that bfs_txq is the actual destination 335239051Sadrian * hardware queue at this point. It may not have been assigned, 336239051Sadrian * it may actually be pointing to the multicast software 337239051Sadrian * TXQ id. These must be fixed! 338239051Sadrian */ 339218065Sadrian ath_hal_filltxdesc(ah, ds 340239051Sadrian , bufAddrList 341239051Sadrian , segLenList 342239051Sadrian , 0 /* XXX desc id */ 343239051Sadrian , bf->bf_state.bfs_txq->axq_qnum /* XXX multicast? */ 344218065Sadrian , i == 0 /* first segment */ 345218065Sadrian , i == bf->bf_nseg - 1 /* last segment */ 346218065Sadrian , ds0 /* first descriptor */ 347218065Sadrian ); 348218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 349218065Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 350218065Sadrian __func__, i, ds->ds_link, ds->ds_data, 351218065Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 352227360Sadrian bf->bf_lastds = ds; 353218065Sadrian } 354233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE); 355218154Sadrian} 356218154Sadrian 357227364Sadrian/* 358227364Sadrian * Fill in the descriptor list for a aggregate subframe. 359227364Sadrian * 360227364Sadrian * The subframe is returned with the ds_link field in the last subframe 361227364Sadrian * pointing to 0. 362227364Sadrian */ 363218154Sadrianstatic void 364227364Sadrianath_tx_chaindesclist_subframe(struct ath_softc *sc, struct ath_buf *bf) 365218154Sadrian{ 366218154Sadrian struct ath_hal *ah = sc->sc_ah; 367227364Sadrian struct ath_desc *ds, *ds0; 368227364Sadrian int i; 369239053Sadrian HAL_DMA_ADDR bufAddrList[4]; 370239053Sadrian uint32_t segLenList[4]; 371239053Sadrian 372238708Sadrian /* 373238708Sadrian * XXX There's txdma and txdma_mgmt; the descriptor 374238708Sadrian * sizes must match. 375238708Sadrian */ 376238708Sadrian struct ath_descdma *dd = &sc->sc_txdma; 377218154Sadrian 378227364Sadrian ds0 = ds = bf->bf_desc; 379218154Sadrian 380218065Sadrian /* 381227364Sadrian * There's no need to call ath_hal_setupfirsttxdesc here; 382227364Sadrian * That's only going to occur for the first frame in an aggregate. 383227364Sadrian */ 384227364Sadrian for (i = 0; i < bf->bf_nseg; i++, ds++) { 385239053Sadrian bzero(bufAddrList, sizeof(bufAddrList)); 386239053Sadrian bzero(segLenList, sizeof(segLenList)); 387227364Sadrian if (i == bf->bf_nseg - 1) 388238609Sadrian ath_hal_settxdesclink(ah, ds, 0); 389227364Sadrian else 390238609Sadrian ath_hal_settxdesclink(ah, ds, 391238708Sadrian bf->bf_daddr + dd->dd_descsize * (i + 1)); 392227364Sadrian 393239053Sadrian bufAddrList[0] = bf->bf_segs[i].ds_addr; 394239053Sadrian segLenList[0] = bf->bf_segs[i].ds_len; 395239053Sadrian 396227364Sadrian /* 397227364Sadrian * This performs the setup for an aggregate frame. 398227364Sadrian * This includes enabling the aggregate flags if needed. 399227364Sadrian */ 400227364Sadrian ath_hal_chaintxdesc(ah, ds, 401239053Sadrian bufAddrList, 402239053Sadrian segLenList, 403227364Sadrian bf->bf_state.bfs_pktlen, 404227364Sadrian bf->bf_state.bfs_hdrlen, 405227364Sadrian HAL_PKT_TYPE_AMPDU, /* forces aggregate bits to be set */ 406227364Sadrian bf->bf_state.bfs_keyix, 407227364Sadrian 0, /* cipher, calculated from keyix */ 408227364Sadrian bf->bf_state.bfs_ndelim, 409227364Sadrian i == 0, /* first segment */ 410233895Sadrian i == bf->bf_nseg - 1, /* last segment */ 411233895Sadrian bf->bf_next == NULL /* last sub-frame in aggr */ 412227364Sadrian ); 413227364Sadrian 414227364Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 415227364Sadrian "%s: %d: %08x %08x %08x %08x %08x %08x\n", 416227364Sadrian __func__, i, ds->ds_link, ds->ds_data, 417227364Sadrian ds->ds_ctl0, ds->ds_ctl1, ds->ds_hw[0], ds->ds_hw[1]); 418227364Sadrian bf->bf_lastds = ds; 419233990Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 420233990Sadrian BUS_DMASYNC_PREWRITE); 421227364Sadrian } 422227364Sadrian} 423227364Sadrian 424227364Sadrian/* 425238947Sadrian * Set the rate control fields in the given descriptor based on 426238947Sadrian * the bf_state fields and node state. 427238947Sadrian * 428238947Sadrian * The bfs fields should already be set with the relevant rate 429238947Sadrian * control information, including whether MRR is to be enabled. 430238947Sadrian * 431238947Sadrian * Since the FreeBSD HAL currently sets up the first TX rate 432238947Sadrian * in ath_hal_setuptxdesc(), this will setup the MRR 433238947Sadrian * conditionally for the pre-11n chips, and call ath_buf_set_rate 434238947Sadrian * unconditionally for 11n chips. These require the 11n rate 435238947Sadrian * scenario to be set if MCS rates are enabled, so it's easier 436238947Sadrian * to just always call it. The caller can then only set rates 2, 3 437238947Sadrian * and 4 if multi-rate retry is needed. 438238947Sadrian */ 439238947Sadrianstatic void 440238947Sadrianath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni, 441238947Sadrian struct ath_buf *bf) 442238947Sadrian{ 443238947Sadrian struct ath_rc_series *rc = bf->bf_state.bfs_rc; 444238947Sadrian 445238947Sadrian /* If mrr is disabled, blank tries 1, 2, 3 */ 446238947Sadrian if (! bf->bf_state.bfs_ismrr) 447238947Sadrian rc[1].tries = rc[2].tries = rc[3].tries = 0; 448238947Sadrian 449238947Sadrian /* 450238947Sadrian * Always call - that way a retried descriptor will 451238947Sadrian * have the MRR fields overwritten. 452238947Sadrian * 453238947Sadrian * XXX TODO: see if this is really needed - setting up 454238947Sadrian * the first descriptor should set the MRR fields to 0 455238947Sadrian * for us anyway. 456238947Sadrian */ 457238947Sadrian if (ath_tx_is_11n(sc)) { 458238947Sadrian ath_buf_set_rate(sc, ni, bf); 459238947Sadrian } else { 460238947Sadrian ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc 461238947Sadrian , rc[1].ratecode, rc[1].tries 462238947Sadrian , rc[2].ratecode, rc[2].tries 463238947Sadrian , rc[3].ratecode, rc[3].tries 464238947Sadrian ); 465238947Sadrian } 466238947Sadrian} 467238947Sadrian 468238947Sadrian/* 469227364Sadrian * Setup segments+descriptors for an 11n aggregate. 470227364Sadrian * bf_first is the first buffer in the aggregate. 471227364Sadrian * The descriptor list must already been linked together using 472227364Sadrian * bf->bf_next. 473227364Sadrian */ 474227364Sadrianstatic void 475227364Sadrianath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first) 476227364Sadrian{ 477227364Sadrian struct ath_buf *bf, *bf_prev = NULL; 478227364Sadrian 479227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n", 480227364Sadrian __func__, bf_first->bf_state.bfs_nframes, 481227364Sadrian bf_first->bf_state.bfs_al); 482227364Sadrian 483227364Sadrian /* 484227364Sadrian * Setup all descriptors of all subframes. 485227364Sadrian */ 486227364Sadrian bf = bf_first; 487227364Sadrian while (bf != NULL) { 488227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 489227364Sadrian "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n", 490227364Sadrian __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen, 491227364Sadrian SEQNO(bf->bf_state.bfs_seqno)); 492227364Sadrian 493227364Sadrian /* Sub-frame setup */ 494227364Sadrian ath_tx_chaindesclist_subframe(sc, bf); 495227364Sadrian 496227364Sadrian /* 497227364Sadrian * Link the last descriptor of the previous frame 498227364Sadrian * to the beginning descriptor of this frame. 499227364Sadrian */ 500227364Sadrian if (bf_prev != NULL) 501238609Sadrian ath_hal_settxdesclink(sc->sc_ah, bf_prev->bf_lastds, 502238609Sadrian bf->bf_daddr); 503227364Sadrian 504227364Sadrian /* Save a copy so we can link the next descriptor in */ 505227364Sadrian bf_prev = bf; 506227364Sadrian bf = bf->bf_next; 507227364Sadrian } 508227364Sadrian 509227364Sadrian /* 510227364Sadrian * Setup first descriptor of first frame. 511227364Sadrian * chaintxdesc() overwrites the descriptor entries; 512227364Sadrian * setupfirsttxdesc() merges in things. 513227364Sadrian * Otherwise various fields aren't set correctly (eg flags). 514227364Sadrian */ 515227364Sadrian ath_hal_setupfirsttxdesc(sc->sc_ah, 516227364Sadrian bf_first->bf_desc, 517227364Sadrian bf_first->bf_state.bfs_al, 518233966Sadrian bf_first->bf_state.bfs_txflags | HAL_TXDESC_INTREQ, 519227364Sadrian bf_first->bf_state.bfs_txpower, 520227364Sadrian bf_first->bf_state.bfs_txrate0, 521227364Sadrian bf_first->bf_state.bfs_try0, 522227364Sadrian bf_first->bf_state.bfs_txantenna, 523227364Sadrian bf_first->bf_state.bfs_ctsrate, 524227364Sadrian bf_first->bf_state.bfs_ctsduration); 525227364Sadrian 526227364Sadrian /* 527227364Sadrian * Set the first descriptor bf_lastds field to point to 528227364Sadrian * the last descriptor in the last subframe, that's where 529227364Sadrian * the status update will occur. 530227364Sadrian */ 531227364Sadrian bf_first->bf_lastds = bf_prev->bf_lastds; 532227364Sadrian 533227364Sadrian /* 534227364Sadrian * And bf_last in the first descriptor points to the end of 535227364Sadrian * the aggregate list. 536227364Sadrian */ 537227364Sadrian bf_first->bf_last = bf_prev; 538227364Sadrian 539238947Sadrian /* 540238947Sadrian * setup first desc with rate and aggr info 541238947Sadrian */ 542238947Sadrian ath_tx_set_ratectrl(sc, bf_first->bf_node, bf_first); 543238947Sadrian 544238949Sadrian /* 545238949Sadrian * Setup the last descriptor in the list. 546238993Sadrian * 547238993Sadrian * bf_first->bf_lastds already points to it; the rate 548238993Sadrian * control information needs to be squirreled away here 549238993Sadrian * as well ans clearing the moreaggr/paddelim fields. 550238949Sadrian */ 551238993Sadrian ath_hal_setuplasttxdesc(sc->sc_ah, bf_first->bf_lastds, 552238949Sadrian bf_first->bf_desc); 553238949Sadrian 554227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__); 555227364Sadrian} 556227364Sadrian 557239051Sadrian/* 558239051Sadrian * Hand-off a frame to the multicast TX queue. 559239051Sadrian * 560239051Sadrian * This is a software TXQ which will be appended to the CAB queue 561239051Sadrian * during the beacon setup code. 562239051Sadrian * 563239051Sadrian * XXX TODO: since the AR9300 EDMA TX queue support wants the QCU ID 564239051Sadrian * as part of the TX descriptor, bf_state.bfs_txq must be updated 565239051Sadrian * with the actual hardware txq, or all of this will fall apart. 566239051Sadrian * 567239051Sadrian * XXX It may not be a bad idea to just stuff the QCU ID into bf_state 568239051Sadrian * and retire bfs_txq; then make sure the CABQ QCU ID is populated 569239051Sadrian * correctly. 570239051Sadrian */ 571227364Sadrianstatic void 572227364Sadrianath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq, 573227364Sadrian struct ath_buf *bf) 574227364Sadrian{ 575227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 576227364Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 577227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 578227364Sadrian if (txq->axq_link != NULL) { 579227364Sadrian struct ath_buf *last = ATH_TXQ_LAST(txq, axq_q_s); 580227364Sadrian struct ieee80211_frame *wh; 581227364Sadrian 582227364Sadrian /* mark previous frame */ 583227364Sadrian wh = mtod(last->bf_m, struct ieee80211_frame *); 584227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 585227364Sadrian bus_dmamap_sync(sc->sc_dmat, last->bf_dmamap, 586227364Sadrian BUS_DMASYNC_PREWRITE); 587227364Sadrian 588227364Sadrian /* link descriptor */ 589227364Sadrian *txq->axq_link = bf->bf_daddr; 590227364Sadrian } 591227364Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 592238609Sadrian ath_hal_gettxdesclinkptr(sc->sc_ah, bf->bf_lastds, &txq->axq_link); 593227364Sadrian} 594227364Sadrian 595227364Sadrian/* 596227364Sadrian * Hand-off packet to a hardware queue. 597227364Sadrian */ 598227364Sadrianstatic void 599229949Sadrianath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq, 600229949Sadrian struct ath_buf *bf) 601227364Sadrian{ 602227364Sadrian struct ath_hal *ah = sc->sc_ah; 603227364Sadrian 604227364Sadrian /* 605218065Sadrian * Insert the frame on the outbound list and pass it on 606218065Sadrian * to the hardware. Multicast frames buffered for power 607218065Sadrian * save stations and transmit from the CAB queue are stored 608218065Sadrian * on a s/w only queue and loaded on to the CAB queue in 609218065Sadrian * the SWBA handler since frames only go out on DTIM and 610218065Sadrian * to avoid possible races. 611218065Sadrian */ 612227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 613218065Sadrian KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0, 614227364Sadrian ("%s: busy status 0x%x", __func__, bf->bf_flags)); 615227364Sadrian KASSERT(txq->axq_qnum != ATH_TXQ_SWQ, 616227364Sadrian ("ath_tx_handoff_hw called for mcast queue")); 617227364Sadrian 618227651Sadrian#if 0 619227651Sadrian /* 620227651Sadrian * This causes a LOR. Find out where the PCU lock is being 621227651Sadrian * held whilst the TXQ lock is grabbed - that shouldn't 622227651Sadrian * be occuring. 623227651Sadrian */ 624227651Sadrian ATH_PCU_LOCK(sc); 625227651Sadrian if (sc->sc_inreset_cnt) { 626227651Sadrian ATH_PCU_UNLOCK(sc); 627227651Sadrian DPRINTF(sc, ATH_DEBUG_RESET, 628227651Sadrian "%s: called with sc_in_reset != 0\n", 629227651Sadrian __func__); 630227651Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 631227651Sadrian "%s: queued: TXDP[%u] = %p (%p) depth %d\n", 632227651Sadrian __func__, txq->axq_qnum, 633227651Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 634227651Sadrian txq->axq_depth); 635227651Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 636227651Sadrian if (bf->bf_state.bfs_aggr) 637227651Sadrian txq->axq_aggr_depth++; 638227651Sadrian /* 639227651Sadrian * There's no need to update axq_link; the hardware 640227651Sadrian * is in reset and once the reset is complete, any 641227651Sadrian * non-empty queues will simply have DMA restarted. 642227651Sadrian */ 643227651Sadrian return; 644227651Sadrian } 645227651Sadrian ATH_PCU_UNLOCK(sc); 646227651Sadrian#endif 647227651Sadrian 648227364Sadrian /* For now, so not to generate whitespace diffs */ 649227364Sadrian if (1) { 650218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 651218065Sadrian int qbusy; 652218065Sadrian 653218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 654218065Sadrian qbusy = ath_hal_txqenabled(ah, txq->axq_qnum); 655218065Sadrian if (txq->axq_link == NULL) { 656218065Sadrian /* 657218065Sadrian * Be careful writing the address to TXDP. If 658218065Sadrian * the tx q is enabled then this write will be 659218065Sadrian * ignored. Normally this is not an issue but 660218065Sadrian * when tdma is in use and the q is beacon gated 661218065Sadrian * this race can occur. If the q is busy then 662218065Sadrian * defer the work to later--either when another 663218065Sadrian * packet comes along or when we prepare a beacon 664218065Sadrian * frame at SWBA. 665218065Sadrian */ 666218065Sadrian if (!qbusy) { 667229949Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 668229949Sadrian bf->bf_daddr); 669218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 670218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 671218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 672218065Sadrian __func__, txq->axq_qnum, 673218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 674218065Sadrian txq->axq_depth); 675218065Sadrian } else { 676218065Sadrian txq->axq_flags |= ATH_TXQ_PUTPENDING; 677218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 678218065Sadrian "%s: Q%u busy, defer enable\n", __func__, 679218065Sadrian txq->axq_qnum); 680218065Sadrian } 681218065Sadrian } else { 682218065Sadrian *txq->axq_link = bf->bf_daddr; 683218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 684218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 685218065Sadrian txq->axq_qnum, txq->axq_link, 686229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 687229949Sadrian txq->axq_depth); 688218065Sadrian if ((txq->axq_flags & ATH_TXQ_PUTPENDING) && !qbusy) { 689218065Sadrian /* 690218065Sadrian * The q was busy when we previously tried 691218065Sadrian * to write the address of the first buffer 692218065Sadrian * in the chain. Since it's not busy now 693218065Sadrian * handle this chore. We are certain the 694218065Sadrian * buffer at the front is the right one since 695218065Sadrian * axq_link is NULL only when the buffer list 696218065Sadrian * is/was empty. 697218065Sadrian */ 698218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, 699227344Sadrian TAILQ_FIRST(&txq->axq_q)->bf_daddr); 700218065Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 701218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA | ATH_DEBUG_XMIT, 702218065Sadrian "%s: Q%u restarted\n", __func__, 703218065Sadrian txq->axq_qnum); 704218065Sadrian } 705218065Sadrian } 706218065Sadrian#else 707218065Sadrian ATH_TXQ_INSERT_TAIL(txq, bf, bf_list); 708218065Sadrian if (txq->axq_link == NULL) { 709218065Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 710218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 711218065Sadrian "%s: TXDP[%u] = %p (%p) depth %d\n", 712218065Sadrian __func__, txq->axq_qnum, 713218065Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 714218065Sadrian txq->axq_depth); 715218065Sadrian } else { 716218065Sadrian *txq->axq_link = bf->bf_daddr; 717218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 718218065Sadrian "%s: link[%u](%p)=%p (%p) depth %d\n", __func__, 719218065Sadrian txq->axq_qnum, txq->axq_link, 720229949Sadrian (caddr_t)bf->bf_daddr, bf->bf_desc, 721229949Sadrian txq->axq_depth); 722218065Sadrian } 723218065Sadrian#endif /* IEEE80211_SUPPORT_TDMA */ 724227360Sadrian if (bf->bf_state.bfs_aggr) 725227360Sadrian txq->axq_aggr_depth++; 726238609Sadrian ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link); 727218065Sadrian ath_hal_txstart(ah, txq->axq_qnum); 728227364Sadrian } 729227364Sadrian} 730218065Sadrian 731227364Sadrian/* 732227364Sadrian * Restart TX DMA for the given TXQ. 733227364Sadrian * 734227364Sadrian * This must be called whether the queue is empty or not. 735227364Sadrian */ 736238930Sadrianstatic void 737238930Sadrianath_legacy_tx_dma_restart(struct ath_softc *sc, struct ath_txq *txq) 738227364Sadrian{ 739227364Sadrian struct ath_hal *ah = sc->sc_ah; 740232707Sadrian struct ath_buf *bf, *bf_last; 741218065Sadrian 742227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 743227364Sadrian 744227364Sadrian /* This is always going to be cleared, empty or not */ 745227364Sadrian txq->axq_flags &= ~ATH_TXQ_PUTPENDING; 746227364Sadrian 747232707Sadrian /* XXX make this ATH_TXQ_FIRST */ 748227364Sadrian bf = TAILQ_FIRST(&txq->axq_q); 749232707Sadrian bf_last = ATH_TXQ_LAST(txq, axq_q_s); 750232707Sadrian 751227364Sadrian if (bf == NULL) 752227364Sadrian return; 753227364Sadrian 754227364Sadrian ath_hal_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); 755239120Sadrian ath_hal_gettxdesclinkptr(ah, bf_last->bf_lastds, &txq->axq_link); 756227364Sadrian ath_hal_txstart(ah, txq->axq_qnum); 757218065Sadrian} 758218065Sadrian 759227364Sadrian/* 760227364Sadrian * Hand off a packet to the hardware (or mcast queue.) 761227364Sadrian * 762227364Sadrian * The relevant hardware txq should be locked. 763227364Sadrian */ 764227364Sadrianstatic void 765238930Sadrianath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq, 766238930Sadrian struct ath_buf *bf) 767227364Sadrian{ 768227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 769227364Sadrian 770227364Sadrian if (txq->axq_qnum == ATH_TXQ_SWQ) 771227364Sadrian ath_tx_handoff_mcast(sc, txq, bf); 772227364Sadrian else 773227364Sadrian ath_tx_handoff_hw(sc, txq, bf); 774227364Sadrian} 775227364Sadrian 776218154Sadrianstatic int 777218154Sadrianath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni, 778229949Sadrian struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen, 779229949Sadrian int *keyix) 780218154Sadrian{ 781233330Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, 782233330Sadrian "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n", 783233330Sadrian __func__, 784233330Sadrian *hdrlen, 785233330Sadrian *pktlen, 786233330Sadrian isfrag, 787233330Sadrian iswep, 788233330Sadrian m0); 789233330Sadrian 790218154Sadrian if (iswep) { 791218154Sadrian const struct ieee80211_cipher *cip; 792218154Sadrian struct ieee80211_key *k; 793218154Sadrian 794218154Sadrian /* 795218154Sadrian * Construct the 802.11 header+trailer for an encrypted 796218154Sadrian * frame. The only reason this can fail is because of an 797218154Sadrian * unknown or unsupported cipher/key type. 798218154Sadrian */ 799218154Sadrian k = ieee80211_crypto_encap(ni, m0); 800218154Sadrian if (k == NULL) { 801218154Sadrian /* 802218154Sadrian * This can happen when the key is yanked after the 803218154Sadrian * frame was queued. Just discard the frame; the 804218154Sadrian * 802.11 layer counts failures and provides 805218154Sadrian * debugging/diagnostics. 806218154Sadrian */ 807229949Sadrian return (0); 808218154Sadrian } 809218154Sadrian /* 810218154Sadrian * Adjust the packet + header lengths for the crypto 811218154Sadrian * additions and calculate the h/w key index. When 812218154Sadrian * a s/w mic is done the frame will have had any mic 813218154Sadrian * added to it prior to entry so m0->m_pkthdr.len will 814218154Sadrian * account for it. Otherwise we need to add it to the 815218154Sadrian * packet length. 816218154Sadrian */ 817218154Sadrian cip = k->wk_cipher; 818218154Sadrian (*hdrlen) += cip->ic_header; 819218154Sadrian (*pktlen) += cip->ic_header + cip->ic_trailer; 820218154Sadrian /* NB: frags always have any TKIP MIC done in s/w */ 821218154Sadrian if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag) 822218154Sadrian (*pktlen) += cip->ic_miclen; 823218154Sadrian (*keyix) = k->wk_keyix; 824218154Sadrian } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) { 825218154Sadrian /* 826218154Sadrian * Use station key cache slot, if assigned. 827218154Sadrian */ 828218154Sadrian (*keyix) = ni->ni_ucastkey.wk_keyix; 829218154Sadrian if ((*keyix) == IEEE80211_KEYIX_NONE) 830218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 831218154Sadrian } else 832218154Sadrian (*keyix) = HAL_TXKEYIX_INVALID; 833218154Sadrian 834229949Sadrian return (1); 835218154Sadrian} 836218154Sadrian 837233989Sadrian/* 838233989Sadrian * Calculate whether interoperability protection is required for 839233989Sadrian * this frame. 840233989Sadrian * 841233989Sadrian * This requires the rate control information be filled in, 842233989Sadrian * as the protection requirement depends upon the current 843233989Sadrian * operating mode / PHY. 844233989Sadrian */ 845233989Sadrianstatic void 846233989Sadrianath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf) 847233989Sadrian{ 848233989Sadrian struct ieee80211_frame *wh; 849233989Sadrian uint8_t rix; 850233989Sadrian uint16_t flags; 851233989Sadrian int shortPreamble; 852233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 853233989Sadrian struct ifnet *ifp = sc->sc_ifp; 854233989Sadrian struct ieee80211com *ic = ifp->if_l2com; 855233989Sadrian 856233989Sadrian flags = bf->bf_state.bfs_txflags; 857233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 858233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 859233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 860233989Sadrian 861233989Sadrian /* 862233989Sadrian * If 802.11g protection is enabled, determine whether 863233989Sadrian * to use RTS/CTS or just CTS. Note that this is only 864233989Sadrian * done for OFDM unicast frames. 865233989Sadrian */ 866233989Sadrian if ((ic->ic_flags & IEEE80211_F_USEPROT) && 867233989Sadrian rt->info[rix].phy == IEEE80211_T_OFDM && 868233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 869233989Sadrian bf->bf_state.bfs_doprot = 1; 870233989Sadrian /* XXX fragments must use CCK rates w/ protection */ 871233989Sadrian if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { 872233989Sadrian flags |= HAL_TXDESC_RTSENA; 873233989Sadrian } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { 874233989Sadrian flags |= HAL_TXDESC_CTSENA; 875233989Sadrian } 876233989Sadrian /* 877233989Sadrian * For frags it would be desirable to use the 878233989Sadrian * highest CCK rate for RTS/CTS. But stations 879233989Sadrian * farther away may detect it at a lower CCK rate 880233989Sadrian * so use the configured protection rate instead 881233989Sadrian * (for now). 882233989Sadrian */ 883233989Sadrian sc->sc_stats.ast_tx_protect++; 884233989Sadrian } 885233989Sadrian 886233989Sadrian /* 887233989Sadrian * If 11n protection is enabled and it's a HT frame, 888233989Sadrian * enable RTS. 889233989Sadrian * 890233989Sadrian * XXX ic_htprotmode or ic_curhtprotmode? 891233989Sadrian * XXX should it_htprotmode only matter if ic_curhtprotmode 892233989Sadrian * XXX indicates it's not a HT pure environment? 893233989Sadrian */ 894233989Sadrian if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) && 895233989Sadrian rt->info[rix].phy == IEEE80211_T_HT && 896233989Sadrian (flags & HAL_TXDESC_NOACK) == 0) { 897233989Sadrian flags |= HAL_TXDESC_RTSENA; 898233989Sadrian sc->sc_stats.ast_tx_htprotect++; 899233989Sadrian } 900233989Sadrian bf->bf_state.bfs_txflags = flags; 901233989Sadrian} 902233989Sadrian 903233989Sadrian/* 904233989Sadrian * Update the frame duration given the currently selected rate. 905233989Sadrian * 906233989Sadrian * This also updates the frame duration value, so it will require 907233989Sadrian * a DMA flush. 908233989Sadrian */ 909233989Sadrianstatic void 910233989Sadrianath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf) 911233989Sadrian{ 912233989Sadrian struct ieee80211_frame *wh; 913233989Sadrian uint8_t rix; 914233989Sadrian uint16_t flags; 915233989Sadrian int shortPreamble; 916233989Sadrian struct ath_hal *ah = sc->sc_ah; 917233989Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 918233989Sadrian int isfrag = bf->bf_m->m_flags & M_FRAG; 919233989Sadrian 920233989Sadrian flags = bf->bf_state.bfs_txflags; 921233989Sadrian rix = bf->bf_state.bfs_rc[0].rix; 922233989Sadrian shortPreamble = bf->bf_state.bfs_shpream; 923233989Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 924233989Sadrian 925233989Sadrian /* 926233989Sadrian * Calculate duration. This logically belongs in the 802.11 927233989Sadrian * layer but it lacks sufficient information to calculate it. 928233989Sadrian */ 929233989Sadrian if ((flags & HAL_TXDESC_NOACK) == 0 && 930233989Sadrian (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) { 931233989Sadrian u_int16_t dur; 932233989Sadrian if (shortPreamble) 933233989Sadrian dur = rt->info[rix].spAckDuration; 934233989Sadrian else 935233989Sadrian dur = rt->info[rix].lpAckDuration; 936233989Sadrian if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) { 937233989Sadrian dur += dur; /* additional SIFS+ACK */ 938233989Sadrian KASSERT(bf->bf_m->m_nextpkt != NULL, ("no fragment")); 939233989Sadrian /* 940233989Sadrian * Include the size of next fragment so NAV is 941233989Sadrian * updated properly. The last fragment uses only 942233989Sadrian * the ACK duration 943233989Sadrian */ 944233989Sadrian dur += ath_hal_computetxtime(ah, rt, 945233989Sadrian bf->bf_m->m_nextpkt->m_pkthdr.len, 946233989Sadrian rix, shortPreamble); 947233989Sadrian } 948233989Sadrian if (isfrag) { 949233989Sadrian /* 950233989Sadrian * Force hardware to use computed duration for next 951233989Sadrian * fragment by disabling multi-rate retry which updates 952233989Sadrian * duration based on the multi-rate duration table. 953233989Sadrian */ 954233989Sadrian bf->bf_state.bfs_ismrr = 0; 955233989Sadrian bf->bf_state.bfs_try0 = ATH_TXMGTTRY; 956233989Sadrian /* XXX update bfs_rc[0].try? */ 957233989Sadrian } 958233989Sadrian 959233989Sadrian /* Update the duration field itself */ 960233989Sadrian *(u_int16_t *)wh->i_dur = htole16(dur); 961233989Sadrian } 962233989Sadrian} 963233989Sadrian 964218932Sadrianstatic uint8_t 965218932Sadrianath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt, 966227364Sadrian int cix, int shortPreamble) 967218157Sadrian{ 968218932Sadrian uint8_t ctsrate; 969218932Sadrian 970218157Sadrian /* 971218157Sadrian * CTS transmit rate is derived from the transmit rate 972218157Sadrian * by looking in the h/w rate table. We must also factor 973218157Sadrian * in whether or not a short preamble is to be used. 974218157Sadrian */ 975218157Sadrian /* NB: cix is set above where RTS/CTS is enabled */ 976218157Sadrian KASSERT(cix != 0xff, ("cix not setup")); 977218932Sadrian ctsrate = rt->info[cix].rateCode; 978218932Sadrian 979218932Sadrian /* XXX this should only matter for legacy rates */ 980218932Sadrian if (shortPreamble) 981218932Sadrian ctsrate |= rt->info[cix].shortPreamble; 982218932Sadrian 983229949Sadrian return (ctsrate); 984218932Sadrian} 985218932Sadrian 986218932Sadrian/* 987218932Sadrian * Calculate the RTS/CTS duration for legacy frames. 988218932Sadrian */ 989218932Sadrianstatic int 990218932Sadrianath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix, 991218932Sadrian int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt, 992218932Sadrian int flags) 993218932Sadrian{ 994218932Sadrian int ctsduration = 0; 995218932Sadrian 996218932Sadrian /* This mustn't be called for HT modes */ 997218932Sadrian if (rt->info[cix].phy == IEEE80211_T_HT) { 998218932Sadrian printf("%s: HT rate where it shouldn't be (0x%x)\n", 999218932Sadrian __func__, rt->info[cix].rateCode); 1000229949Sadrian return (-1); 1001218932Sadrian } 1002218932Sadrian 1003218157Sadrian /* 1004218157Sadrian * Compute the transmit duration based on the frame 1005218157Sadrian * size and the size of an ACK frame. We call into the 1006218157Sadrian * HAL to do the computation since it depends on the 1007218157Sadrian * characteristics of the actual PHY being used. 1008218157Sadrian * 1009218157Sadrian * NB: CTS is assumed the same size as an ACK so we can 1010218157Sadrian * use the precalculated ACK durations. 1011218157Sadrian */ 1012218157Sadrian if (shortPreamble) { 1013218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1014218932Sadrian ctsduration += rt->info[cix].spAckDuration; 1015218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1016218157Sadrian rt, pktlen, rix, AH_TRUE); 1017218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1018218932Sadrian ctsduration += rt->info[rix].spAckDuration; 1019218157Sadrian } else { 1020218157Sadrian if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */ 1021218932Sadrian ctsduration += rt->info[cix].lpAckDuration; 1022218932Sadrian ctsduration += ath_hal_computetxtime(ah, 1023218157Sadrian rt, pktlen, rix, AH_FALSE); 1024218157Sadrian if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */ 1025218932Sadrian ctsduration += rt->info[rix].lpAckDuration; 1026218157Sadrian } 1027218932Sadrian 1028229949Sadrian return (ctsduration); 1029218157Sadrian} 1030218157Sadrian 1031227364Sadrian/* 1032227364Sadrian * Update the given ath_buf with updated rts/cts setup and duration 1033227364Sadrian * values. 1034227364Sadrian * 1035227364Sadrian * To support rate lookups for each software retry, the rts/cts rate 1036227364Sadrian * and cts duration must be re-calculated. 1037227364Sadrian * 1038227364Sadrian * This function assumes the RTS/CTS flags have been set as needed; 1039227364Sadrian * mrr has been disabled; and the rate control lookup has been done. 1040227364Sadrian * 1041227364Sadrian * XXX TODO: MRR need only be disabled for the pre-11n NICs. 1042227364Sadrian * XXX The 11n NICs support per-rate RTS/CTS configuration. 1043227364Sadrian */ 1044227364Sadrianstatic void 1045227364Sadrianath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf) 1046218065Sadrian{ 1047227364Sadrian uint16_t ctsduration = 0; 1048227364Sadrian uint8_t ctsrate = 0; 1049227364Sadrian uint8_t rix = bf->bf_state.bfs_rc[0].rix; 1050227364Sadrian uint8_t cix = 0; 1051227364Sadrian const HAL_RATE_TABLE *rt = sc->sc_currates; 1052227364Sadrian 1053227364Sadrian /* 1054227364Sadrian * No RTS/CTS enabled? Don't bother. 1055227364Sadrian */ 1056233966Sadrian if ((bf->bf_state.bfs_txflags & 1057227364Sadrian (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) { 1058227364Sadrian /* XXX is this really needed? */ 1059227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1060227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1061227364Sadrian return; 1062227364Sadrian } 1063227364Sadrian 1064227364Sadrian /* 1065227364Sadrian * If protection is enabled, use the protection rix control 1066227364Sadrian * rate. Otherwise use the rate0 control rate. 1067227364Sadrian */ 1068227364Sadrian if (bf->bf_state.bfs_doprot) 1069227364Sadrian rix = sc->sc_protrix; 1070227364Sadrian else 1071227364Sadrian rix = bf->bf_state.bfs_rc[0].rix; 1072227364Sadrian 1073227364Sadrian /* 1074227364Sadrian * If the raw path has hard-coded ctsrate0 to something, 1075227364Sadrian * use it. 1076227364Sadrian */ 1077227364Sadrian if (bf->bf_state.bfs_ctsrate0 != 0) 1078227364Sadrian cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0); 1079227364Sadrian else 1080227364Sadrian /* Control rate from above */ 1081227364Sadrian cix = rt->info[rix].controlRate; 1082227364Sadrian 1083227364Sadrian /* Calculate the rtscts rate for the given cix */ 1084227364Sadrian ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix, 1085227364Sadrian bf->bf_state.bfs_shpream); 1086227364Sadrian 1087227364Sadrian /* The 11n chipsets do ctsduration calculations for you */ 1088227364Sadrian if (! ath_tx_is_11n(sc)) 1089227364Sadrian ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix, 1090227364Sadrian bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen, 1091233966Sadrian rt, bf->bf_state.bfs_txflags); 1092227364Sadrian 1093227364Sadrian /* Squirrel away in ath_buf */ 1094227364Sadrian bf->bf_state.bfs_ctsrate = ctsrate; 1095227364Sadrian bf->bf_state.bfs_ctsduration = ctsduration; 1096227364Sadrian 1097227364Sadrian /* 1098227364Sadrian * Must disable multi-rate retry when using RTS/CTS. 1099227364Sadrian */ 1100238961Sadrian if (!sc->sc_mrrprot) { 1101238961Sadrian bf->bf_state.bfs_ismrr = 0; 1102238961Sadrian bf->bf_state.bfs_try0 = 1103238961Sadrian bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */ 1104238961Sadrian } 1105227364Sadrian} 1106227364Sadrian 1107227364Sadrian/* 1108227364Sadrian * Setup the descriptor chain for a normal or fast-frame 1109227364Sadrian * frame. 1110239051Sadrian * 1111239051Sadrian * XXX TODO: extend to include the destination hardware QCU ID. 1112239051Sadrian * Make sure that is correct. Make sure that when being added 1113239051Sadrian * to the mcastq, the CABQ QCUID is set or things will get a bit 1114239051Sadrian * odd. 1115227364Sadrian */ 1116227364Sadrianstatic void 1117227364Sadrianath_tx_setds(struct ath_softc *sc, struct ath_buf *bf) 1118227364Sadrian{ 1119227364Sadrian struct ath_desc *ds = bf->bf_desc; 1120227364Sadrian struct ath_hal *ah = sc->sc_ah; 1121227364Sadrian 1122227364Sadrian ath_hal_setuptxdesc(ah, ds 1123227364Sadrian , bf->bf_state.bfs_pktlen /* packet length */ 1124227364Sadrian , bf->bf_state.bfs_hdrlen /* header length */ 1125227364Sadrian , bf->bf_state.bfs_atype /* Atheros packet type */ 1126227364Sadrian , bf->bf_state.bfs_txpower /* txpower */ 1127227364Sadrian , bf->bf_state.bfs_txrate0 1128227364Sadrian , bf->bf_state.bfs_try0 /* series 0 rate/tries */ 1129227364Sadrian , bf->bf_state.bfs_keyix /* key cache index */ 1130227364Sadrian , bf->bf_state.bfs_txantenna /* antenna mode */ 1131233966Sadrian , bf->bf_state.bfs_txflags /* flags */ 1132227364Sadrian , bf->bf_state.bfs_ctsrate /* rts/cts rate */ 1133227364Sadrian , bf->bf_state.bfs_ctsduration /* rts/cts duration */ 1134227364Sadrian ); 1135227364Sadrian 1136227364Sadrian /* 1137227364Sadrian * This will be overriden when the descriptor chain is written. 1138227364Sadrian */ 1139227364Sadrian bf->bf_lastds = ds; 1140227364Sadrian bf->bf_last = bf; 1141227364Sadrian 1142238947Sadrian /* Set rate control and descriptor chain for this frame */ 1143238947Sadrian ath_tx_set_ratectrl(sc, bf->bf_node, bf); 1144238947Sadrian ath_tx_chaindesclist(sc, bf); 1145227364Sadrian} 1146227364Sadrian 1147227364Sadrian/* 1148227364Sadrian * Do a rate lookup. 1149227364Sadrian * 1150227364Sadrian * This performs a rate lookup for the given ath_buf only if it's required. 1151227364Sadrian * Non-data frames and raw frames don't require it. 1152227364Sadrian * 1153227364Sadrian * This populates the primary and MRR entries; MRR values are 1154227364Sadrian * then disabled later on if something requires it (eg RTS/CTS on 1155227364Sadrian * pre-11n chipsets. 1156227364Sadrian * 1157227364Sadrian * This needs to be done before the RTS/CTS fields are calculated 1158227364Sadrian * as they may depend upon the rate chosen. 1159227364Sadrian */ 1160227364Sadrianstatic void 1161227364Sadrianath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf) 1162227364Sadrian{ 1163227364Sadrian uint8_t rate, rix; 1164227364Sadrian int try0; 1165227364Sadrian 1166227364Sadrian if (! bf->bf_state.bfs_doratelookup) 1167227364Sadrian return; 1168227364Sadrian 1169227364Sadrian /* Get rid of any previous state */ 1170227364Sadrian bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1171227364Sadrian 1172227364Sadrian ATH_NODE_LOCK(ATH_NODE(bf->bf_node)); 1173227364Sadrian ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream, 1174227364Sadrian bf->bf_state.bfs_pktlen, &rix, &try0, &rate); 1175227364Sadrian 1176227364Sadrian /* In case MRR is disabled, make sure rc[0] is setup correctly */ 1177227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1178227364Sadrian bf->bf_state.bfs_rc[0].ratecode = rate; 1179227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1180227364Sadrian 1181227364Sadrian if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY) 1182227364Sadrian ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix, 1183227364Sadrian bf->bf_state.bfs_rc); 1184227364Sadrian ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node)); 1185227364Sadrian 1186227364Sadrian sc->sc_txrix = rix; /* for LED blinking */ 1187227364Sadrian sc->sc_lastdatarix = rix; /* for fast frames */ 1188227364Sadrian bf->bf_state.bfs_try0 = try0; 1189227364Sadrian bf->bf_state.bfs_txrate0 = rate; 1190227364Sadrian} 1191227364Sadrian 1192227364Sadrian/* 1193227364Sadrian * Transmit the given frame to the hardware. 1194227364Sadrian * 1195227364Sadrian * The frame must already be setup; rate control must already have 1196227364Sadrian * been done. 1197227364Sadrian * 1198227364Sadrian * XXX since the TXQ lock is being held here (and I dislike holding 1199227364Sadrian * it for this long when not doing software aggregation), later on 1200227364Sadrian * break this function into "setup_normal" and "xmit_normal". The 1201227364Sadrian * lock only needs to be held for the ath_tx_handoff call. 1202227364Sadrian */ 1203227364Sadrianstatic void 1204227364Sadrianath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq, 1205227364Sadrian struct ath_buf *bf) 1206227364Sadrian{ 1207227364Sadrian 1208227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1209227364Sadrian 1210227364Sadrian /* Setup the descriptor before handoff */ 1211227364Sadrian ath_tx_do_ratelookup(sc, bf); 1212233989Sadrian ath_tx_calc_duration(sc, bf); 1213233989Sadrian ath_tx_calc_protection(sc, bf); 1214233989Sadrian ath_tx_set_rtscts(sc, bf); 1215227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1216227364Sadrian ath_tx_setds(sc, bf); 1217227364Sadrian 1218227364Sadrian /* Hand off to hardware */ 1219227364Sadrian ath_tx_handoff(sc, txq, bf); 1220227364Sadrian} 1221227364Sadrian 1222227364Sadrian 1223227364Sadrian 1224227364Sadrianstatic int 1225227364Sadrianath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni, 1226234009Sadrian struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq) 1227227364Sadrian{ 1228218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1229218065Sadrian struct ath_hal *ah = sc->sc_ah; 1230218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1231218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1232218065Sadrian const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1233218065Sadrian int error, iswep, ismcast, isfrag, ismrr; 1234227364Sadrian int keyix, hdrlen, pktlen, try0 = 0; 1235227364Sadrian u_int8_t rix = 0, txrate = 0; 1236218065Sadrian struct ath_desc *ds; 1237218065Sadrian struct ieee80211_frame *wh; 1238227364Sadrian u_int subtype, flags; 1239218065Sadrian HAL_PKT_TYPE atype; 1240218065Sadrian const HAL_RATE_TABLE *rt; 1241218065Sadrian HAL_BOOL shortPreamble; 1242218065Sadrian struct ath_node *an; 1243218065Sadrian u_int pri; 1244218065Sadrian 1245236880Sadrian /* 1246236880Sadrian * To ensure that both sequence numbers and the CCMP PN handling 1247236880Sadrian * is "correct", make sure that the relevant TID queue is locked. 1248236880Sadrian * Otherwise the CCMP PN and seqno may appear out of order, causing 1249236880Sadrian * re-ordered frames to have out of order CCMP PN's, resulting 1250236880Sadrian * in many, many frame drops. 1251236880Sadrian */ 1252236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 1253236880Sadrian 1254218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1255218065Sadrian iswep = wh->i_fc[1] & IEEE80211_FC1_WEP; 1256218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1257218065Sadrian isfrag = m0->m_flags & M_FRAG; 1258218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1259218065Sadrian /* 1260218065Sadrian * Packet length must not include any 1261218065Sadrian * pad bytes; deduct them here. 1262218065Sadrian */ 1263218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3); 1264218065Sadrian 1265218154Sadrian /* Handle encryption twiddling if needed */ 1266227364Sadrian if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen, 1267227364Sadrian &pktlen, &keyix)) { 1268218154Sadrian ath_freetx(m0); 1269218154Sadrian return EIO; 1270218154Sadrian } 1271218065Sadrian 1272218154Sadrian /* packet header may have moved, reset our local pointer */ 1273218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1274218065Sadrian 1275218065Sadrian pktlen += IEEE80211_CRC_LEN; 1276218065Sadrian 1277218065Sadrian /* 1278218065Sadrian * Load the DMA map so any coalescing is done. This 1279218065Sadrian * also calculates the number of descriptors we need. 1280218065Sadrian */ 1281218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1282218065Sadrian if (error != 0) 1283218065Sadrian return error; 1284218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1285218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1286218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1287218065Sadrian 1288218065Sadrian /* setup descriptors */ 1289218065Sadrian ds = bf->bf_desc; 1290218065Sadrian rt = sc->sc_currates; 1291218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1292218065Sadrian 1293218065Sadrian /* 1294218065Sadrian * NB: the 802.11 layer marks whether or not we should 1295218065Sadrian * use short preamble based on the current mode and 1296218065Sadrian * negotiated parameters. 1297218065Sadrian */ 1298218065Sadrian if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1299218065Sadrian (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1300218065Sadrian shortPreamble = AH_TRUE; 1301218065Sadrian sc->sc_stats.ast_tx_shortpre++; 1302218065Sadrian } else { 1303218065Sadrian shortPreamble = AH_FALSE; 1304218065Sadrian } 1305218065Sadrian 1306218065Sadrian an = ATH_NODE(ni); 1307218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1308218065Sadrian ismrr = 0; /* default no multi-rate retry*/ 1309218065Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 1310218065Sadrian /* XXX use txparams instead of fixed values */ 1311218065Sadrian /* 1312218065Sadrian * Calculate Atheros packet type from IEEE80211 packet header, 1313218065Sadrian * setup for rate calculations, and select h/w transmit queue. 1314218065Sadrian */ 1315218065Sadrian switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 1316218065Sadrian case IEEE80211_FC0_TYPE_MGT: 1317218065Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1318218065Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) 1319218065Sadrian atype = HAL_PKT_TYPE_BEACON; 1320218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1321218065Sadrian atype = HAL_PKT_TYPE_PROBE_RESP; 1322218065Sadrian else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM) 1323218065Sadrian atype = HAL_PKT_TYPE_ATIM; 1324218065Sadrian else 1325218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* XXX */ 1326218065Sadrian rix = an->an_mgmtrix; 1327218065Sadrian txrate = rt->info[rix].rateCode; 1328218065Sadrian if (shortPreamble) 1329218065Sadrian txrate |= rt->info[rix].shortPreamble; 1330218065Sadrian try0 = ATH_TXMGTTRY; 1331218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1332218065Sadrian break; 1333218065Sadrian case IEEE80211_FC0_TYPE_CTL: 1334218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */ 1335218065Sadrian rix = an->an_mgmtrix; 1336218065Sadrian txrate = rt->info[rix].rateCode; 1337218065Sadrian if (shortPreamble) 1338218065Sadrian txrate |= rt->info[rix].shortPreamble; 1339218065Sadrian try0 = ATH_TXMGTTRY; 1340218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1341218065Sadrian break; 1342218065Sadrian case IEEE80211_FC0_TYPE_DATA: 1343218065Sadrian atype = HAL_PKT_TYPE_NORMAL; /* default */ 1344218065Sadrian /* 1345218065Sadrian * Data frames: multicast frames go out at a fixed rate, 1346218065Sadrian * EAPOL frames use the mgmt frame rate; otherwise consult 1347218065Sadrian * the rate control module for the rate to use. 1348218065Sadrian */ 1349218065Sadrian if (ismcast) { 1350218065Sadrian rix = an->an_mcastrix; 1351218065Sadrian txrate = rt->info[rix].rateCode; 1352218065Sadrian if (shortPreamble) 1353218065Sadrian txrate |= rt->info[rix].shortPreamble; 1354218065Sadrian try0 = 1; 1355218065Sadrian } else if (m0->m_flags & M_EAPOL) { 1356218065Sadrian /* XXX? maybe always use long preamble? */ 1357218065Sadrian rix = an->an_mgmtrix; 1358218065Sadrian txrate = rt->info[rix].rateCode; 1359218065Sadrian if (shortPreamble) 1360218065Sadrian txrate |= rt->info[rix].shortPreamble; 1361218065Sadrian try0 = ATH_TXMAXTRY; /* XXX?too many? */ 1362218065Sadrian } else { 1363227364Sadrian /* 1364227364Sadrian * Do rate lookup on each TX, rather than using 1365227364Sadrian * the hard-coded TX information decided here. 1366227364Sadrian */ 1367227364Sadrian ismrr = 1; 1368227364Sadrian bf->bf_state.bfs_doratelookup = 1; 1369218065Sadrian } 1370218065Sadrian if (cap->cap_wmeParams[pri].wmep_noackPolicy) 1371218065Sadrian flags |= HAL_TXDESC_NOACK; 1372218065Sadrian break; 1373218065Sadrian default: 1374218065Sadrian if_printf(ifp, "bogus frame type 0x%x (%s)\n", 1375218065Sadrian wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__); 1376218065Sadrian /* XXX statistic */ 1377218065Sadrian ath_freetx(m0); 1378218065Sadrian return EIO; 1379218065Sadrian } 1380218065Sadrian 1381237041Sadrian /* 1382237041Sadrian * There are two known scenarios where the frame AC doesn't match 1383237041Sadrian * what the destination TXQ is. 1384237041Sadrian * 1385237041Sadrian * + non-QoS frames (eg management?) that the net80211 stack has 1386237041Sadrian * assigned a higher AC to, but since it's a non-QoS TID, it's 1387237041Sadrian * being thrown into TID 16. TID 16 gets the AC_BE queue. 1388237041Sadrian * It's quite possible that management frames should just be 1389237041Sadrian * direct dispatched to hardware rather than go via the software 1390237041Sadrian * queue; that should be investigated in the future. There are 1391237041Sadrian * some specific scenarios where this doesn't make sense, mostly 1392237041Sadrian * surrounding ADDBA request/response - hence why that is special 1393237041Sadrian * cased. 1394237041Sadrian * 1395237041Sadrian * + Multicast frames going into the VAP mcast queue. That shows up 1396237041Sadrian * as "TXQ 11". 1397237041Sadrian * 1398237041Sadrian * This driver should eventually support separate TID and TXQ locking, 1399237041Sadrian * allowing for arbitrary AC frames to appear on arbitrary software 1400237041Sadrian * queues, being queued to the "correct" hardware queue when needed. 1401237041Sadrian */ 1402237041Sadrian#if 0 1403235750Sadrian if (txq != sc->sc_ac2q[pri]) { 1404235750Sadrian device_printf(sc->sc_dev, 1405235750Sadrian "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n", 1406235750Sadrian __func__, 1407235750Sadrian txq, 1408235750Sadrian txq->axq_qnum, 1409235750Sadrian pri, 1410235750Sadrian sc->sc_ac2q[pri], 1411235750Sadrian sc->sc_ac2q[pri]->axq_qnum); 1412235750Sadrian } 1413237041Sadrian#endif 1414235750Sadrian 1415218065Sadrian /* 1416218065Sadrian * Calculate miscellaneous flags. 1417218065Sadrian */ 1418218065Sadrian if (ismcast) { 1419218065Sadrian flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */ 1420218065Sadrian } else if (pktlen > vap->iv_rtsthreshold && 1421218065Sadrian (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) { 1422218065Sadrian flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */ 1423218065Sadrian sc->sc_stats.ast_tx_rts++; 1424218065Sadrian } 1425218065Sadrian if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */ 1426218065Sadrian sc->sc_stats.ast_tx_noack++; 1427218065Sadrian#ifdef IEEE80211_SUPPORT_TDMA 1428218065Sadrian if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) { 1429218065Sadrian DPRINTF(sc, ATH_DEBUG_TDMA, 1430218065Sadrian "%s: discard frame, ACK required w/ TDMA\n", __func__); 1431218065Sadrian sc->sc_stats.ast_tdma_ack++; 1432218065Sadrian ath_freetx(m0); 1433218065Sadrian return EIO; 1434218065Sadrian } 1435218065Sadrian#endif 1436218065Sadrian 1437218065Sadrian /* 1438227364Sadrian * Determine if a tx interrupt should be generated for 1439227364Sadrian * this descriptor. We take a tx interrupt to reap 1440227364Sadrian * descriptors when the h/w hits an EOL condition or 1441227364Sadrian * when the descriptor is specifically marked to generate 1442227364Sadrian * an interrupt. We periodically mark descriptors in this 1443227364Sadrian * way to insure timely replenishing of the supply needed 1444227364Sadrian * for sending frames. Defering interrupts reduces system 1445227364Sadrian * load and potentially allows more concurrent work to be 1446227364Sadrian * done but if done to aggressively can cause senders to 1447227364Sadrian * backup. 1448227364Sadrian * 1449227364Sadrian * NB: use >= to deal with sc_txintrperiod changing 1450227364Sadrian * dynamically through sysctl. 1451218065Sadrian */ 1452227364Sadrian if (flags & HAL_TXDESC_INTREQ) { 1453227364Sadrian txq->axq_intrcnt = 0; 1454227364Sadrian } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) { 1455227364Sadrian flags |= HAL_TXDESC_INTREQ; 1456227364Sadrian txq->axq_intrcnt = 0; 1457227364Sadrian } 1458218932Sadrian 1459227364Sadrian /* This point forward is actual TX bits */ 1460218065Sadrian 1461218065Sadrian /* 1462218065Sadrian * At this point we are committed to sending the frame 1463218065Sadrian * and we don't need to look at m_nextpkt; clear it in 1464218065Sadrian * case this frame is part of frag chain. 1465218065Sadrian */ 1466218065Sadrian m0->m_nextpkt = NULL; 1467218065Sadrian 1468218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1469218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len, 1470218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1471218065Sadrian 1472218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1473218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1474218065Sadrian 1475218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1476218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1477218065Sadrian if (iswep) 1478218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1479218065Sadrian if (isfrag) 1480218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1481218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1482218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1483218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1484218065Sadrian 1485218065Sadrian ieee80211_radiotap_tx(vap, m0); 1486218065Sadrian } 1487218065Sadrian 1488227364Sadrian /* Blank the legacy rate array */ 1489227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1490227364Sadrian 1491218065Sadrian /* 1492227364Sadrian * ath_buf_set_rate needs at least one rate/try to setup 1493227364Sadrian * the rate scenario. 1494227364Sadrian */ 1495227364Sadrian bf->bf_state.bfs_rc[0].rix = rix; 1496227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1497227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1498227364Sadrian 1499227364Sadrian /* Store the decided rate index values away */ 1500227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1501227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1502227364Sadrian bf->bf_state.bfs_atype = atype; 1503227364Sadrian bf->bf_state.bfs_txpower = ni->ni_txpower; 1504227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1505227364Sadrian bf->bf_state.bfs_try0 = try0; 1506227364Sadrian bf->bf_state.bfs_keyix = keyix; 1507227364Sadrian bf->bf_state.bfs_txantenna = sc->sc_txantenna; 1508233966Sadrian bf->bf_state.bfs_txflags = flags; 1509227364Sadrian bf->bf_state.bfs_shpream = shortPreamble; 1510227364Sadrian 1511227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1512227364Sadrian bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */ 1513227364Sadrian bf->bf_state.bfs_ctsrate = 0; /* calculated later */ 1514227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1515227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1516227364Sadrian 1517227364Sadrian return 0; 1518227364Sadrian} 1519227364Sadrian 1520227364Sadrian/* 1521227364Sadrian * Direct-dispatch the current frame to the hardware. 1522227364Sadrian * 1523227364Sadrian * This can be called by the net80211 code. 1524227364Sadrian * 1525227364Sadrian * XXX what about locking? Or, push the seqno assign into the 1526227364Sadrian * XXX aggregate scheduler so its serialised? 1527227364Sadrian */ 1528227364Sadrianint 1529227364Sadrianath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni, 1530227364Sadrian struct ath_buf *bf, struct mbuf *m0) 1531227364Sadrian{ 1532227364Sadrian struct ieee80211vap *vap = ni->ni_vap; 1533227364Sadrian struct ath_vap *avp = ATH_VAP(vap); 1534232764Sadrian int r = 0; 1535227364Sadrian u_int pri; 1536227364Sadrian int tid; 1537227364Sadrian struct ath_txq *txq; 1538227364Sadrian int ismcast; 1539227364Sadrian const struct ieee80211_frame *wh; 1540227364Sadrian int is_ampdu, is_ampdu_tx, is_ampdu_pending; 1541236872Sadrian ieee80211_seq seqno; 1542227364Sadrian uint8_t type, subtype; 1543227364Sadrian 1544227364Sadrian /* 1545227364Sadrian * Determine the target hardware queue. 1546218065Sadrian * 1547234009Sadrian * For multicast frames, the txq gets overridden appropriately 1548234009Sadrian * depending upon the state of PS. 1549227364Sadrian * 1550227364Sadrian * For any other frame, we do a TID/QoS lookup inside the frame 1551227364Sadrian * to see what the TID should be. If it's a non-QoS frame, the 1552227364Sadrian * AC and TID are overridden. The TID/TXQ code assumes the 1553227364Sadrian * TID is on a predictable hardware TXQ, so we don't support 1554227364Sadrian * having a node TID queued to multiple hardware TXQs. 1555227364Sadrian * This may change in the future but would require some locking 1556227364Sadrian * fudgery. 1557218065Sadrian */ 1558227364Sadrian pri = ath_tx_getac(sc, m0); 1559227364Sadrian tid = ath_tx_gettid(sc, m0); 1560218065Sadrian 1561227364Sadrian txq = sc->sc_ac2q[pri]; 1562227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 1563227364Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1564227364Sadrian type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1565227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1566227364Sadrian 1567232764Sadrian /* 1568232764Sadrian * Enforce how deep the multicast queue can grow. 1569232764Sadrian * 1570232764Sadrian * XXX duplicated in ath_raw_xmit(). 1571232764Sadrian */ 1572232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1573232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1574232764Sadrian 1575232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1576232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1577232764Sadrian r = ENOBUFS; 1578232764Sadrian } 1579232764Sadrian 1580232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1581232764Sadrian 1582232764Sadrian if (r != 0) { 1583232764Sadrian m_freem(m0); 1584232764Sadrian return r; 1585232764Sadrian } 1586232764Sadrian } 1587232764Sadrian 1588227364Sadrian /* A-MPDU TX */ 1589227364Sadrian is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid); 1590227364Sadrian is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid); 1591227364Sadrian is_ampdu = is_ampdu_tx | is_ampdu_pending; 1592227364Sadrian 1593236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n", 1594236872Sadrian __func__, tid, pri, is_ampdu); 1595227364Sadrian 1596239051Sadrian /* Set local packet state, used to queue packets to hardware */ 1597239051Sadrian bf->bf_state.bfs_tid = tid; 1598239051Sadrian bf->bf_state.bfs_txq = txq; 1599239051Sadrian bf->bf_state.bfs_pri = pri; 1600239051Sadrian 1601232753Sadrian /* 1602234009Sadrian * When servicing one or more stations in power-save mode 1603234009Sadrian * (or) if there is some mcast data waiting on the mcast 1604234009Sadrian * queue (to prevent out of order delivery) multicast frames 1605234009Sadrian * must be bufferd until after the beacon. 1606234009Sadrian * 1607234009Sadrian * TODO: we should lock the mcastq before we check the length. 1608232753Sadrian */ 1609239051Sadrian if (ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) { 1610227364Sadrian txq = &avp->av_mcastq; 1611239051Sadrian /* 1612239051Sadrian * Mark the frame as eventually belonging on the CAB 1613239051Sadrian * queue, so the descriptor setup functions will 1614239051Sadrian * correctly initialise the descriptor 'qcuId' field. 1615239051Sadrian */ 1616239051Sadrian bf->bf_state.bfs_txq = sc->sc_cabq; 1617239051Sadrian } 1618227364Sadrian 1619227364Sadrian /* Do the generic frame setup */ 1620227364Sadrian /* XXX should just bzero the bf_state? */ 1621227364Sadrian bf->bf_state.bfs_dobaw = 0; 1622227364Sadrian 1623236880Sadrian /* 1624236880Sadrian * Acquire the TXQ lock early, so both the encap and seqno 1625236880Sadrian * are allocated together. 1626239051Sadrian * 1627239051Sadrian * XXX should TXQ for CABQ traffic be the multicast queue, 1628239051Sadrian * or the TXQ the given PRI would allocate from? (eg for 1629239051Sadrian * sequence number allocation locking.) 1630236880Sadrian */ 1631236880Sadrian ATH_TXQ_LOCK(txq); 1632236880Sadrian 1633227364Sadrian /* A-MPDU TX? Manually set sequence number */ 1634236880Sadrian /* 1635236880Sadrian * Don't do it whilst pending; the net80211 layer still 1636236880Sadrian * assigns them. 1637236880Sadrian */ 1638227364Sadrian if (is_ampdu_tx) { 1639227364Sadrian /* 1640227364Sadrian * Always call; this function will 1641227364Sadrian * handle making sure that null data frames 1642227364Sadrian * don't get a sequence number from the current 1643227364Sadrian * TID and thus mess with the BAW. 1644227364Sadrian */ 1645236872Sadrian seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0); 1646236874Sadrian 1647236874Sadrian /* 1648236874Sadrian * Don't add QoS NULL frames to the BAW. 1649236874Sadrian */ 1650236872Sadrian if (IEEE80211_QOS_HAS_SEQ(wh) && 1651236872Sadrian subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) { 1652227364Sadrian bf->bf_state.bfs_dobaw = 1; 1653227364Sadrian } 1654218240Sadrian } 1655218240Sadrian 1656218065Sadrian /* 1657227364Sadrian * If needed, the sequence number has been assigned. 1658227364Sadrian * Squirrel it away somewhere easy to get to. 1659218065Sadrian */ 1660236872Sadrian bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT; 1661227364Sadrian 1662227364Sadrian /* Is ampdu pending? fetch the seqno and print it out */ 1663227364Sadrian if (is_ampdu_pending) 1664227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1665227364Sadrian "%s: tid %d: ampdu pending, seqno %d\n", 1666227364Sadrian __func__, tid, M_SEQNO_GET(m0)); 1667227364Sadrian 1668227364Sadrian /* This also sets up the DMA map */ 1669234009Sadrian r = ath_tx_normal_setup(sc, ni, bf, m0, txq); 1670227364Sadrian 1671227364Sadrian if (r != 0) 1672236880Sadrian goto done; 1673227364Sadrian 1674227364Sadrian /* At this point m0 could have changed! */ 1675227364Sadrian m0 = bf->bf_m; 1676227364Sadrian 1677227364Sadrian#if 1 1678218065Sadrian /* 1679227364Sadrian * If it's a multicast frame, do a direct-dispatch to the 1680227364Sadrian * destination hardware queue. Don't bother software 1681227364Sadrian * queuing it. 1682218065Sadrian */ 1683227364Sadrian /* 1684227364Sadrian * If it's a BAR frame, do a direct dispatch to the 1685227364Sadrian * destination hardware queue. Don't bother software 1686227364Sadrian * queuing it, as the TID will now be paused. 1687227364Sadrian * Sending a BAR frame can occur from the net80211 txa timer 1688227364Sadrian * (ie, retries) or from the ath txtask (completion call.) 1689227364Sadrian * It queues directly to hardware because the TID is paused 1690227364Sadrian * at this point (and won't be unpaused until the BAR has 1691227364Sadrian * either been TXed successfully or max retries has been 1692227364Sadrian * reached.) 1693227364Sadrian */ 1694227364Sadrian if (txq == &avp->av_mcastq) { 1695235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1696233227Sadrian "%s: bf=%p: mcastq: TX'ing\n", __func__, bf); 1697227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1698227364Sadrian } else if (type == IEEE80211_FC0_TYPE_CTL && 1699227364Sadrian subtype == IEEE80211_FC0_SUBTYPE_BAR) { 1700235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1701227364Sadrian "%s: BAR: TX'ing direct\n", __func__); 1702227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1703227364Sadrian } else { 1704227364Sadrian /* add to software queue */ 1705235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 1706233227Sadrian "%s: bf=%p: swq: TX'ing\n", __func__, bf); 1707227364Sadrian ath_tx_swq(sc, ni, txq, bf); 1708227364Sadrian } 1709227364Sadrian#else 1710227364Sadrian /* 1711227364Sadrian * For now, since there's no software queue, 1712227364Sadrian * direct-dispatch to the hardware. 1713227364Sadrian */ 1714227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 1715236880Sadrian#endif 1716236880Sadriandone: 1717227364Sadrian ATH_TXQ_UNLOCK(txq); 1718218065Sadrian 1719218065Sadrian return 0; 1720218065Sadrian} 1721218065Sadrian 1722218065Sadrianstatic int 1723218065Sadrianath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni, 1724218065Sadrian struct ath_buf *bf, struct mbuf *m0, 1725218065Sadrian const struct ieee80211_bpf_params *params) 1726218065Sadrian{ 1727218065Sadrian struct ifnet *ifp = sc->sc_ifp; 1728218065Sadrian struct ieee80211com *ic = ifp->if_l2com; 1729218065Sadrian struct ath_hal *ah = sc->sc_ah; 1730218065Sadrian struct ieee80211vap *vap = ni->ni_vap; 1731218065Sadrian int error, ismcast, ismrr; 1732218065Sadrian int keyix, hdrlen, pktlen, try0, txantenna; 1733227364Sadrian u_int8_t rix, txrate; 1734218065Sadrian struct ieee80211_frame *wh; 1735227364Sadrian u_int flags; 1736218065Sadrian HAL_PKT_TYPE atype; 1737218065Sadrian const HAL_RATE_TABLE *rt; 1738218065Sadrian struct ath_desc *ds; 1739218065Sadrian u_int pri; 1740227364Sadrian int o_tid = -1; 1741227364Sadrian int do_override; 1742218065Sadrian 1743218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1744218065Sadrian ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1745218065Sadrian hdrlen = ieee80211_anyhdrsize(wh); 1746218065Sadrian /* 1747218065Sadrian * Packet length must not include any 1748218065Sadrian * pad bytes; deduct them here. 1749218065Sadrian */ 1750218065Sadrian /* XXX honor IEEE80211_BPF_DATAPAD */ 1751218065Sadrian pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN; 1752218065Sadrian 1753227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n", 1754227364Sadrian __func__, ismcast); 1755227364Sadrian 1756236880Sadrian pri = params->ibp_pri & 3; 1757236880Sadrian /* Override pri if the frame isn't a QoS one */ 1758236880Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 1759236880Sadrian pri = ath_tx_getac(sc, m0); 1760236880Sadrian 1761236880Sadrian /* XXX If it's an ADDBA, override the correct queue */ 1762236880Sadrian do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid); 1763236880Sadrian 1764236880Sadrian /* Map ADDBA to the correct priority */ 1765236880Sadrian if (do_override) { 1766236880Sadrian#if 0 1767236880Sadrian device_printf(sc->sc_dev, 1768236880Sadrian "%s: overriding tid %d pri %d -> %d\n", 1769236880Sadrian __func__, o_tid, pri, TID_TO_WME_AC(o_tid)); 1770236880Sadrian#endif 1771236880Sadrian pri = TID_TO_WME_AC(o_tid); 1772236880Sadrian } 1773236880Sadrian 1774236880Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[pri]); 1775236880Sadrian 1776218154Sadrian /* Handle encryption twiddling if needed */ 1777227364Sadrian if (! ath_tx_tag_crypto(sc, ni, 1778227364Sadrian m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0, 1779227364Sadrian &hdrlen, &pktlen, &keyix)) { 1780218154Sadrian ath_freetx(m0); 1781218154Sadrian return EIO; 1782218154Sadrian } 1783218154Sadrian /* packet header may have moved, reset our local pointer */ 1784218154Sadrian wh = mtod(m0, struct ieee80211_frame *); 1785218065Sadrian 1786227364Sadrian /* Do the generic frame setup */ 1787227364Sadrian /* XXX should just bzero the bf_state? */ 1788227364Sadrian bf->bf_state.bfs_dobaw = 0; 1789227364Sadrian 1790218065Sadrian error = ath_tx_dmasetup(sc, bf, m0); 1791218065Sadrian if (error != 0) 1792218065Sadrian return error; 1793218065Sadrian m0 = bf->bf_m; /* NB: may have changed */ 1794218065Sadrian wh = mtod(m0, struct ieee80211_frame *); 1795218065Sadrian bf->bf_node = ni; /* NB: held reference */ 1796218065Sadrian 1797218065Sadrian flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */ 1798218065Sadrian flags |= HAL_TXDESC_INTREQ; /* force interrupt */ 1799218065Sadrian if (params->ibp_flags & IEEE80211_BPF_RTS) 1800218065Sadrian flags |= HAL_TXDESC_RTSENA; 1801227364Sadrian else if (params->ibp_flags & IEEE80211_BPF_CTS) { 1802227364Sadrian /* XXX assume 11g/11n protection? */ 1803227364Sadrian bf->bf_state.bfs_doprot = 1; 1804218065Sadrian flags |= HAL_TXDESC_CTSENA; 1805227364Sadrian } 1806218065Sadrian /* XXX leave ismcast to injector? */ 1807218065Sadrian if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast) 1808218065Sadrian flags |= HAL_TXDESC_NOACK; 1809218065Sadrian 1810218065Sadrian rt = sc->sc_currates; 1811218065Sadrian KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); 1812218065Sadrian rix = ath_tx_findrix(sc, params->ibp_rate0); 1813218065Sadrian txrate = rt->info[rix].rateCode; 1814218065Sadrian if (params->ibp_flags & IEEE80211_BPF_SHORTPRE) 1815218065Sadrian txrate |= rt->info[rix].shortPreamble; 1816218065Sadrian sc->sc_txrix = rix; 1817218065Sadrian try0 = params->ibp_try0; 1818218065Sadrian ismrr = (params->ibp_try1 != 0); 1819218065Sadrian txantenna = params->ibp_pri >> 2; 1820218065Sadrian if (txantenna == 0) /* XXX? */ 1821218065Sadrian txantenna = sc->sc_txantenna; 1822218157Sadrian 1823227364Sadrian /* 1824227364Sadrian * Since ctsrate is fixed, store it away for later 1825227364Sadrian * use when the descriptor fields are being set. 1826227364Sadrian */ 1827227364Sadrian if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA)) 1828227364Sadrian bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate; 1829218157Sadrian 1830218065Sadrian /* 1831218065Sadrian * NB: we mark all packets as type PSPOLL so the h/w won't 1832218065Sadrian * set the sequence number, duration, etc. 1833218065Sadrian */ 1834218065Sadrian atype = HAL_PKT_TYPE_PSPOLL; 1835218065Sadrian 1836218065Sadrian if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT)) 1837218065Sadrian ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len, 1838218065Sadrian sc->sc_hwmap[rix].ieeerate, -1); 1839218065Sadrian 1840218065Sadrian if (ieee80211_radiotap_active_vap(vap)) { 1841218065Sadrian u_int64_t tsf = ath_hal_gettsf64(ah); 1842218065Sadrian 1843218065Sadrian sc->sc_tx_th.wt_tsf = htole64(tsf); 1844218065Sadrian sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags; 1845218065Sadrian if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1846218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1847218065Sadrian if (m0->m_flags & M_FRAG) 1848218065Sadrian sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG; 1849218065Sadrian sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate; 1850218065Sadrian sc->sc_tx_th.wt_txpower = ni->ni_txpower; 1851218065Sadrian sc->sc_tx_th.wt_antenna = sc->sc_txantenna; 1852218065Sadrian 1853218065Sadrian ieee80211_radiotap_tx(vap, m0); 1854218065Sadrian } 1855218065Sadrian 1856218065Sadrian /* 1857218065Sadrian * Formulate first tx descriptor with tx controls. 1858218065Sadrian */ 1859218065Sadrian ds = bf->bf_desc; 1860218065Sadrian /* XXX check return value? */ 1861227364Sadrian 1862227364Sadrian /* Store the decided rate index values away */ 1863227364Sadrian bf->bf_state.bfs_pktlen = pktlen; 1864227364Sadrian bf->bf_state.bfs_hdrlen = hdrlen; 1865227364Sadrian bf->bf_state.bfs_atype = atype; 1866227364Sadrian bf->bf_state.bfs_txpower = params->ibp_power; 1867227364Sadrian bf->bf_state.bfs_txrate0 = txrate; 1868227364Sadrian bf->bf_state.bfs_try0 = try0; 1869227364Sadrian bf->bf_state.bfs_keyix = keyix; 1870227364Sadrian bf->bf_state.bfs_txantenna = txantenna; 1871233966Sadrian bf->bf_state.bfs_txflags = flags; 1872227364Sadrian bf->bf_state.bfs_shpream = 1873227364Sadrian !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE); 1874218065Sadrian 1875239051Sadrian /* Set local packet state, used to queue packets to hardware */ 1876239051Sadrian bf->bf_state.bfs_tid = WME_AC_TO_TID(pri); 1877239051Sadrian bf->bf_state.bfs_txq = sc->sc_ac2q[pri]; 1878239051Sadrian bf->bf_state.bfs_pri = pri; 1879239051Sadrian 1880227364Sadrian /* XXX this should be done in ath_tx_setrate() */ 1881227364Sadrian bf->bf_state.bfs_ctsrate = 0; 1882227364Sadrian bf->bf_state.bfs_ctsduration = 0; 1883227364Sadrian bf->bf_state.bfs_ismrr = ismrr; 1884218240Sadrian 1885227364Sadrian /* Blank the legacy rate array */ 1886227364Sadrian bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc)); 1887218240Sadrian 1888227364Sadrian bf->bf_state.bfs_rc[0].rix = 1889227364Sadrian ath_tx_findrix(sc, params->ibp_rate0); 1890227364Sadrian bf->bf_state.bfs_rc[0].tries = try0; 1891227364Sadrian bf->bf_state.bfs_rc[0].ratecode = txrate; 1892227364Sadrian 1893227364Sadrian if (ismrr) { 1894227364Sadrian int rix; 1895227364Sadrian 1896227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate1); 1897227364Sadrian bf->bf_state.bfs_rc[1].rix = rix; 1898227364Sadrian bf->bf_state.bfs_rc[1].tries = params->ibp_try1; 1899227364Sadrian 1900227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate2); 1901227364Sadrian bf->bf_state.bfs_rc[2].rix = rix; 1902227364Sadrian bf->bf_state.bfs_rc[2].tries = params->ibp_try2; 1903227364Sadrian 1904227364Sadrian rix = ath_tx_findrix(sc, params->ibp_rate3); 1905227364Sadrian bf->bf_state.bfs_rc[3].rix = rix; 1906227364Sadrian bf->bf_state.bfs_rc[3].tries = params->ibp_try3; 1907218065Sadrian } 1908227364Sadrian /* 1909227364Sadrian * All the required rate control decisions have been made; 1910227364Sadrian * fill in the rc flags. 1911227364Sadrian */ 1912227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 1913218065Sadrian 1914227364Sadrian /* NB: no buffered multicast in power save support */ 1915227364Sadrian 1916227364Sadrian /* 1917227364Sadrian * If we're overiding the ADDBA destination, dump directly 1918227364Sadrian * into the hardware queue, right after any pending 1919227364Sadrian * frames to that node are. 1920227364Sadrian */ 1921227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n", 1922227364Sadrian __func__, do_override); 1923227364Sadrian 1924227364Sadrian if (do_override) { 1925227364Sadrian ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf); 1926227364Sadrian } else { 1927227364Sadrian /* Queue to software queue */ 1928227364Sadrian ath_tx_swq(sc, ni, sc->sc_ac2q[pri], bf); 1929227364Sadrian } 1930236880Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[pri]); 1931227364Sadrian 1932218065Sadrian return 0; 1933218065Sadrian} 1934218065Sadrian 1935227364Sadrian/* 1936227364Sadrian * Send a raw frame. 1937227364Sadrian * 1938227364Sadrian * This can be called by net80211. 1939227364Sadrian */ 1940218065Sadrianint 1941218065Sadrianath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1942218065Sadrian const struct ieee80211_bpf_params *params) 1943218065Sadrian{ 1944218065Sadrian struct ieee80211com *ic = ni->ni_ic; 1945218065Sadrian struct ifnet *ifp = ic->ic_ifp; 1946218065Sadrian struct ath_softc *sc = ifp->if_softc; 1947218065Sadrian struct ath_buf *bf; 1948232764Sadrian struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1949232764Sadrian int error = 0; 1950218065Sadrian 1951227651Sadrian ATH_PCU_LOCK(sc); 1952227651Sadrian if (sc->sc_inreset_cnt > 0) { 1953227651Sadrian device_printf(sc->sc_dev, "%s: sc_inreset_cnt > 0; bailing\n", 1954227651Sadrian __func__); 1955227651Sadrian error = EIO; 1956227651Sadrian ATH_PCU_UNLOCK(sc); 1957227651Sadrian goto bad0; 1958227651Sadrian } 1959227651Sadrian sc->sc_txstart_cnt++; 1960227651Sadrian ATH_PCU_UNLOCK(sc); 1961227651Sadrian 1962218065Sadrian if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) { 1963218065Sadrian DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__, 1964218065Sadrian (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ? 1965218065Sadrian "!running" : "invalid"); 1966218065Sadrian m_freem(m); 1967218065Sadrian error = ENETDOWN; 1968218065Sadrian goto bad; 1969218065Sadrian } 1970232764Sadrian 1971218065Sadrian /* 1972232764Sadrian * Enforce how deep the multicast queue can grow. 1973232764Sadrian * 1974232764Sadrian * XXX duplicated in ath_tx_start(). 1975232764Sadrian */ 1976232764Sadrian if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1977232764Sadrian ATH_TXQ_LOCK(sc->sc_cabq); 1978232764Sadrian 1979232794Sadrian if (sc->sc_cabq->axq_depth > sc->sc_txq_mcastq_maxdepth) { 1980232764Sadrian sc->sc_stats.ast_tx_mcastq_overflow++; 1981232764Sadrian error = ENOBUFS; 1982232764Sadrian } 1983232764Sadrian 1984232764Sadrian ATH_TXQ_UNLOCK(sc->sc_cabq); 1985232764Sadrian 1986232764Sadrian if (error != 0) { 1987232764Sadrian m_freem(m); 1988232764Sadrian goto bad; 1989232764Sadrian } 1990232764Sadrian } 1991232764Sadrian 1992232764Sadrian /* 1993218065Sadrian * Grab a TX buffer and associated resources. 1994218065Sadrian */ 1995237000Sadrian bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT); 1996218065Sadrian if (bf == NULL) { 1997218065Sadrian sc->sc_stats.ast_tx_nobuf++; 1998218065Sadrian m_freem(m); 1999218065Sadrian error = ENOBUFS; 2000218065Sadrian goto bad; 2001218065Sadrian } 2002218065Sadrian 2003218065Sadrian if (params == NULL) { 2004218065Sadrian /* 2005218065Sadrian * Legacy path; interpret frame contents to decide 2006218065Sadrian * precisely how to send the frame. 2007218065Sadrian */ 2008218065Sadrian if (ath_tx_start(sc, ni, bf, m)) { 2009218065Sadrian error = EIO; /* XXX */ 2010218065Sadrian goto bad2; 2011218065Sadrian } 2012218065Sadrian } else { 2013218065Sadrian /* 2014218065Sadrian * Caller supplied explicit parameters to use in 2015218065Sadrian * sending the frame. 2016218065Sadrian */ 2017218065Sadrian if (ath_tx_raw_start(sc, ni, bf, m, params)) { 2018218065Sadrian error = EIO; /* XXX */ 2019218065Sadrian goto bad2; 2020218065Sadrian } 2021218065Sadrian } 2022218065Sadrian sc->sc_wd_timer = 5; 2023218065Sadrian ifp->if_opackets++; 2024218065Sadrian sc->sc_stats.ast_tx_raw++; 2025218065Sadrian 2026227651Sadrian ATH_PCU_LOCK(sc); 2027227651Sadrian sc->sc_txstart_cnt--; 2028227651Sadrian ATH_PCU_UNLOCK(sc); 2029227651Sadrian 2030218065Sadrian return 0; 2031218065Sadrianbad2: 2032218065Sadrian ATH_TXBUF_LOCK(sc); 2033236993Sadrian ath_returnbuf_head(sc, bf); 2034218065Sadrian ATH_TXBUF_UNLOCK(sc); 2035218065Sadrianbad: 2036227651Sadrian ATH_PCU_LOCK(sc); 2037227651Sadrian sc->sc_txstart_cnt--; 2038227651Sadrian ATH_PCU_UNLOCK(sc); 2039227651Sadrianbad0: 2040218065Sadrian ifp->if_oerrors++; 2041218065Sadrian sc->sc_stats.ast_tx_raw_fail++; 2042218065Sadrian ieee80211_free_node(ni); 2043227651Sadrian 2044218065Sadrian return error; 2045218065Sadrian} 2046227364Sadrian 2047227364Sadrian/* Some helper functions */ 2048227364Sadrian 2049227364Sadrian/* 2050227364Sadrian * ADDBA (and potentially others) need to be placed in the same 2051227364Sadrian * hardware queue as the TID/node it's relating to. This is so 2052227364Sadrian * it goes out after any pending non-aggregate frames to the 2053227364Sadrian * same node/TID. 2054227364Sadrian * 2055227364Sadrian * If this isn't done, the ADDBA can go out before the frames 2056227364Sadrian * queued in hardware. Even though these frames have a sequence 2057227364Sadrian * number -earlier- than the ADDBA can be transmitted (but 2058227364Sadrian * no frames whose sequence numbers are after the ADDBA should 2059227364Sadrian * be!) they'll arrive after the ADDBA - and the receiving end 2060227364Sadrian * will simply drop them as being out of the BAW. 2061227364Sadrian * 2062227364Sadrian * The frames can't be appended to the TID software queue - it'll 2063227364Sadrian * never be sent out. So these frames have to be directly 2064227364Sadrian * dispatched to the hardware, rather than queued in software. 2065227364Sadrian * So if this function returns true, the TXQ has to be 2066227364Sadrian * overridden and it has to be directly dispatched. 2067227364Sadrian * 2068227364Sadrian * It's a dirty hack, but someone's gotta do it. 2069227364Sadrian */ 2070227364Sadrian 2071227364Sadrian/* 2072227364Sadrian * XXX doesn't belong here! 2073227364Sadrian */ 2074227364Sadrianstatic int 2075227364Sadrianieee80211_is_action(struct ieee80211_frame *wh) 2076227364Sadrian{ 2077227364Sadrian /* Type: Management frame? */ 2078227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != 2079227364Sadrian IEEE80211_FC0_TYPE_MGT) 2080227364Sadrian return 0; 2081227364Sadrian 2082227364Sadrian /* Subtype: Action frame? */ 2083227364Sadrian if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) != 2084227364Sadrian IEEE80211_FC0_SUBTYPE_ACTION) 2085227364Sadrian return 0; 2086227364Sadrian 2087227364Sadrian return 1; 2088227364Sadrian} 2089227364Sadrian 2090227364Sadrian#define MS(_v, _f) (((_v) & _f) >> _f##_S) 2091227364Sadrian/* 2092227364Sadrian * Return an alternate TID for ADDBA request frames. 2093227364Sadrian * 2094227364Sadrian * Yes, this likely should be done in the net80211 layer. 2095227364Sadrian */ 2096227364Sadrianstatic int 2097227364Sadrianath_tx_action_frame_override_queue(struct ath_softc *sc, 2098227364Sadrian struct ieee80211_node *ni, 2099227364Sadrian struct mbuf *m0, int *tid) 2100227364Sadrian{ 2101227364Sadrian struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); 2102227364Sadrian struct ieee80211_action_ba_addbarequest *ia; 2103227364Sadrian uint8_t *frm; 2104227364Sadrian uint16_t baparamset; 2105227364Sadrian 2106227364Sadrian /* Not action frame? Bail */ 2107227364Sadrian if (! ieee80211_is_action(wh)) 2108227364Sadrian return 0; 2109227364Sadrian 2110227364Sadrian /* XXX Not needed for frames we send? */ 2111227364Sadrian#if 0 2112227364Sadrian /* Correct length? */ 2113227364Sadrian if (! ieee80211_parse_action(ni, m)) 2114227364Sadrian return 0; 2115227364Sadrian#endif 2116227364Sadrian 2117227364Sadrian /* Extract out action frame */ 2118227364Sadrian frm = (u_int8_t *)&wh[1]; 2119227364Sadrian ia = (struct ieee80211_action_ba_addbarequest *) frm; 2120227364Sadrian 2121227364Sadrian /* Not ADDBA? Bail */ 2122227364Sadrian if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA) 2123227364Sadrian return 0; 2124227364Sadrian if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST) 2125227364Sadrian return 0; 2126227364Sadrian 2127227364Sadrian /* Extract TID, return it */ 2128227364Sadrian baparamset = le16toh(ia->rq_baparamset); 2129227364Sadrian *tid = (int) MS(baparamset, IEEE80211_BAPS_TID); 2130227364Sadrian 2131227364Sadrian return 1; 2132227364Sadrian} 2133227364Sadrian#undef MS 2134227364Sadrian 2135227364Sadrian/* Per-node software queue operations */ 2136227364Sadrian 2137227364Sadrian/* 2138227364Sadrian * Add the current packet to the given BAW. 2139227364Sadrian * It is assumed that the current packet 2140227364Sadrian * 2141227364Sadrian * + fits inside the BAW; 2142227364Sadrian * + already has had a sequence number allocated. 2143227364Sadrian * 2144227364Sadrian * Since the BAW status may be modified by both the ath task and 2145227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2146227364Sadrian */ 2147227364Sadrianvoid 2148227364Sadrianath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an, 2149227364Sadrian struct ath_tid *tid, struct ath_buf *bf) 2150227364Sadrian{ 2151227364Sadrian int index, cindex; 2152227364Sadrian struct ieee80211_tx_ampdu *tap; 2153227364Sadrian 2154227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2155236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2156227364Sadrian 2157227364Sadrian if (bf->bf_state.bfs_isretried) 2158227364Sadrian return; 2159227364Sadrian 2160236886Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2161236886Sadrian 2162236880Sadrian if (! bf->bf_state.bfs_dobaw) { 2163236880Sadrian device_printf(sc->sc_dev, 2164236880Sadrian "%s: dobaw=0, seqno=%d, window %d:%d\n", 2165236880Sadrian __func__, 2166236880Sadrian SEQNO(bf->bf_state.bfs_seqno), 2167236880Sadrian tap->txa_start, 2168236880Sadrian tap->txa_wnd); 2169236880Sadrian } 2170236880Sadrian 2171227364Sadrian if (bf->bf_state.bfs_addedbaw) 2172227364Sadrian device_printf(sc->sc_dev, 2173236872Sadrian "%s: re-added? tid=%d, seqno %d; window %d:%d; " 2174229949Sadrian "baw head=%d tail=%d\n", 2175236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2176229949Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2177229949Sadrian tid->baw_tail); 2178227364Sadrian 2179227364Sadrian /* 2180236880Sadrian * Verify that the given sequence number is not outside of the 2181236880Sadrian * BAW. Complain loudly if that's the case. 2182236880Sadrian */ 2183236880Sadrian if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2184236880Sadrian SEQNO(bf->bf_state.bfs_seqno))) { 2185236880Sadrian device_printf(sc->sc_dev, 2186236880Sadrian "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; " 2187236880Sadrian "baw head=%d tail=%d\n", 2188236880Sadrian __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2189236880Sadrian tap->txa_start, tap->txa_wnd, tid->baw_head, 2190236880Sadrian tid->baw_tail); 2191236880Sadrian } 2192236880Sadrian 2193236880Sadrian /* 2194227364Sadrian * ni->ni_txseqs[] is the currently allocated seqno. 2195227364Sadrian * the txa state contains the current baw start. 2196227364Sadrian */ 2197227364Sadrian index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno)); 2198227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2199227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2200236872Sadrian "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d " 2201229949Sadrian "baw head=%d tail=%d\n", 2202236872Sadrian __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno), 2203229949Sadrian tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head, 2204229949Sadrian tid->baw_tail); 2205227364Sadrian 2206227364Sadrian 2207227364Sadrian#if 0 2208227364Sadrian assert(tid->tx_buf[cindex] == NULL); 2209227364Sadrian#endif 2210227364Sadrian if (tid->tx_buf[cindex] != NULL) { 2211227364Sadrian device_printf(sc->sc_dev, 2212227364Sadrian "%s: ba packet dup (index=%d, cindex=%d, " 2213227364Sadrian "head=%d, tail=%d)\n", 2214227364Sadrian __func__, index, cindex, tid->baw_head, tid->baw_tail); 2215227364Sadrian device_printf(sc->sc_dev, 2216227364Sadrian "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n", 2217227364Sadrian __func__, 2218227364Sadrian tid->tx_buf[cindex], 2219227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno), 2220227364Sadrian bf, 2221227364Sadrian SEQNO(bf->bf_state.bfs_seqno) 2222227364Sadrian ); 2223227364Sadrian } 2224227364Sadrian tid->tx_buf[cindex] = bf; 2225227364Sadrian 2226229949Sadrian if (index >= ((tid->baw_tail - tid->baw_head) & 2227229949Sadrian (ATH_TID_MAX_BUFS - 1))) { 2228227364Sadrian tid->baw_tail = cindex; 2229227364Sadrian INCR(tid->baw_tail, ATH_TID_MAX_BUFS); 2230227364Sadrian } 2231227364Sadrian} 2232227364Sadrian 2233227364Sadrian/* 2234227398Sadrian * Flip the BAW buffer entry over from the existing one to the new one. 2235227398Sadrian * 2236227398Sadrian * When software retransmitting a (sub-)frame, it is entirely possible that 2237227398Sadrian * the frame ath_buf is marked as BUSY and can't be immediately reused. 2238227398Sadrian * In that instance the buffer is cloned and the new buffer is used for 2239227398Sadrian * retransmit. We thus need to update the ath_buf slot in the BAW buf 2240227398Sadrian * tracking array to maintain consistency. 2241227398Sadrian */ 2242227398Sadrianstatic void 2243227398Sadrianath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an, 2244227398Sadrian struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf) 2245227398Sadrian{ 2246227398Sadrian int index, cindex; 2247227398Sadrian struct ieee80211_tx_ampdu *tap; 2248227398Sadrian int seqno = SEQNO(old_bf->bf_state.bfs_seqno); 2249227398Sadrian 2250227398Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2251236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2252227398Sadrian 2253227398Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2254227398Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2255227398Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2256227398Sadrian 2257227398Sadrian /* 2258227398Sadrian * Just warn for now; if it happens then we should find out 2259227398Sadrian * about it. It's highly likely the aggregation session will 2260227398Sadrian * soon hang. 2261227398Sadrian */ 2262227398Sadrian if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) { 2263227398Sadrian device_printf(sc->sc_dev, "%s: retransmitted buffer" 2264227398Sadrian " has mismatching seqno's, BA session may hang.\n", 2265227398Sadrian __func__); 2266227398Sadrian device_printf(sc->sc_dev, "%s: old seqno=%d, new_seqno=%d\n", 2267227398Sadrian __func__, 2268227398Sadrian old_bf->bf_state.bfs_seqno, 2269227398Sadrian new_bf->bf_state.bfs_seqno); 2270227398Sadrian } 2271227398Sadrian 2272227398Sadrian if (tid->tx_buf[cindex] != old_bf) { 2273227398Sadrian device_printf(sc->sc_dev, "%s: ath_buf pointer incorrect; " 2274227398Sadrian " has m BA session may hang.\n", 2275227398Sadrian __func__); 2276227398Sadrian device_printf(sc->sc_dev, "%s: old bf=%p, new bf=%p\n", 2277227398Sadrian __func__, 2278227398Sadrian old_bf, new_bf); 2279227398Sadrian } 2280227398Sadrian 2281227398Sadrian tid->tx_buf[cindex] = new_bf; 2282227398Sadrian} 2283227398Sadrian 2284227398Sadrian/* 2285227364Sadrian * seq_start - left edge of BAW 2286227364Sadrian * seq_next - current/next sequence number to allocate 2287227364Sadrian * 2288227364Sadrian * Since the BAW status may be modified by both the ath task and 2289227364Sadrian * the net80211/ifnet contexts, the TID must be locked. 2290227364Sadrian */ 2291227364Sadrianstatic void 2292227364Sadrianath_tx_update_baw(struct ath_softc *sc, struct ath_node *an, 2293227364Sadrian struct ath_tid *tid, const struct ath_buf *bf) 2294227364Sadrian{ 2295227364Sadrian int index, cindex; 2296227364Sadrian struct ieee80211_tx_ampdu *tap; 2297227364Sadrian int seqno = SEQNO(bf->bf_state.bfs_seqno); 2298227364Sadrian 2299227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2300236879Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2301227364Sadrian 2302227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2303227364Sadrian index = ATH_BA_INDEX(tap->txa_start, seqno); 2304227364Sadrian cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); 2305227364Sadrian 2306227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2307236872Sadrian "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, " 2308229949Sadrian "baw head=%d, tail=%d\n", 2309236872Sadrian __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index, 2310227364Sadrian cindex, tid->baw_head, tid->baw_tail); 2311227364Sadrian 2312227364Sadrian /* 2313227364Sadrian * If this occurs then we have a big problem - something else 2314227364Sadrian * has slid tap->txa_start along without updating the BAW 2315227364Sadrian * tracking start/end pointers. Thus the TX BAW state is now 2316227364Sadrian * completely busted. 2317227364Sadrian * 2318227364Sadrian * But for now, since I haven't yet fixed TDMA and buffer cloning, 2319227364Sadrian * it's quite possible that a cloned buffer is making its way 2320227364Sadrian * here and causing it to fire off. Disable TDMA for now. 2321227364Sadrian */ 2322227364Sadrian if (tid->tx_buf[cindex] != bf) { 2323227364Sadrian device_printf(sc->sc_dev, 2324227364Sadrian "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n", 2325227364Sadrian __func__, 2326227364Sadrian bf, SEQNO(bf->bf_state.bfs_seqno), 2327227364Sadrian tid->tx_buf[cindex], 2328227364Sadrian SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno)); 2329227364Sadrian } 2330227364Sadrian 2331227364Sadrian tid->tx_buf[cindex] = NULL; 2332227364Sadrian 2333229949Sadrian while (tid->baw_head != tid->baw_tail && 2334229949Sadrian !tid->tx_buf[tid->baw_head]) { 2335227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 2336227364Sadrian INCR(tid->baw_head, ATH_TID_MAX_BUFS); 2337227364Sadrian } 2338229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 2339229949Sadrian "%s: baw is now %d:%d, baw head=%d\n", 2340227364Sadrian __func__, tap->txa_start, tap->txa_wnd, tid->baw_head); 2341227364Sadrian} 2342227364Sadrian 2343227364Sadrian/* 2344227364Sadrian * Mark the current node/TID as ready to TX. 2345227364Sadrian * 2346227364Sadrian * This is done to make it easy for the software scheduler to 2347227364Sadrian * find which nodes have data to send. 2348227364Sadrian * 2349227364Sadrian * The TXQ lock must be held. 2350227364Sadrian */ 2351227364Sadrianstatic void 2352227364Sadrianath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid) 2353227364Sadrian{ 2354227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2355227364Sadrian 2356227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2357227364Sadrian 2358227364Sadrian if (tid->paused) 2359227364Sadrian return; /* paused, can't schedule yet */ 2360227364Sadrian 2361227364Sadrian if (tid->sched) 2362227364Sadrian return; /* already scheduled */ 2363227364Sadrian 2364227364Sadrian tid->sched = 1; 2365227364Sadrian 2366227364Sadrian TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem); 2367227364Sadrian} 2368227364Sadrian 2369227364Sadrian/* 2370227364Sadrian * Mark the current node as no longer needing to be polled for 2371227364Sadrian * TX packets. 2372227364Sadrian * 2373227364Sadrian * The TXQ lock must be held. 2374227364Sadrian */ 2375227364Sadrianstatic void 2376227364Sadrianath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid) 2377227364Sadrian{ 2378227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2379227364Sadrian 2380227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2381227364Sadrian 2382227364Sadrian if (tid->sched == 0) 2383227364Sadrian return; 2384227364Sadrian 2385227364Sadrian tid->sched = 0; 2386227364Sadrian TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem); 2387227364Sadrian} 2388227364Sadrian 2389227364Sadrian/* 2390227364Sadrian * Assign a sequence number manually to the given frame. 2391227364Sadrian * 2392227364Sadrian * This should only be called for A-MPDU TX frames. 2393227364Sadrian */ 2394236872Sadrianstatic ieee80211_seq 2395227364Sadrianath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni, 2396227364Sadrian struct ath_buf *bf, struct mbuf *m0) 2397227364Sadrian{ 2398227364Sadrian struct ieee80211_frame *wh; 2399227364Sadrian int tid, pri; 2400227364Sadrian ieee80211_seq seqno; 2401227364Sadrian uint8_t subtype; 2402227364Sadrian 2403227364Sadrian /* TID lookup */ 2404227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2405227364Sadrian pri = M_WME_GETAC(m0); /* honor classification */ 2406227364Sadrian tid = WME_AC_TO_TID(pri); 2407236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n", 2408236872Sadrian __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2409227364Sadrian 2410227364Sadrian /* XXX Is it a control frame? Ignore */ 2411227364Sadrian 2412227364Sadrian /* Does the packet require a sequence number? */ 2413227364Sadrian if (! IEEE80211_QOS_HAS_SEQ(wh)) 2414227364Sadrian return -1; 2415227364Sadrian 2416236880Sadrian ATH_TID_LOCK_ASSERT(sc, &(ATH_NODE(ni)->an_tid[tid])); 2417236880Sadrian 2418227364Sadrian /* 2419227364Sadrian * Is it a QOS NULL Data frame? Give it a sequence number from 2420227364Sadrian * the default TID (IEEE80211_NONQOS_TID.) 2421227364Sadrian * 2422227364Sadrian * The RX path of everything I've looked at doesn't include the NULL 2423227364Sadrian * data frame sequence number in the aggregation state updates, so 2424227364Sadrian * assigning it a sequence number there will cause a BAW hole on the 2425227364Sadrian * RX side. 2426227364Sadrian */ 2427227364Sadrian subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 2428227364Sadrian if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) { 2429236880Sadrian /* XXX no locking for this TID? This is a bit of a problem. */ 2430227364Sadrian seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]; 2431227364Sadrian INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE); 2432227364Sadrian } else { 2433227364Sadrian /* Manually assign sequence number */ 2434227364Sadrian seqno = ni->ni_txseqs[tid]; 2435227364Sadrian INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE); 2436227364Sadrian } 2437227364Sadrian *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 2438227364Sadrian M_SEQNO_SET(m0, seqno); 2439227364Sadrian 2440227364Sadrian /* Return so caller can do something with it if needed */ 2441236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno); 2442227364Sadrian return seqno; 2443227364Sadrian} 2444227364Sadrian 2445227364Sadrian/* 2446227364Sadrian * Attempt to direct dispatch an aggregate frame to hardware. 2447227364Sadrian * If the frame is out of BAW, queue. 2448227364Sadrian * Otherwise, schedule it as a single frame. 2449227364Sadrian */ 2450227364Sadrianstatic void 2451239051Sadrianath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an, 2452239051Sadrian struct ath_txq *txq, struct ath_buf *bf) 2453227364Sadrian{ 2454227364Sadrian struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid]; 2455239051Sadrian// struct ath_txq *txq = bf->bf_state.bfs_txq; 2456227364Sadrian struct ieee80211_tx_ampdu *tap; 2457227364Sadrian 2458239051Sadrian if (txq != bf->bf_state.bfs_txq) { 2459239051Sadrian device_printf(sc->sc_dev, "%s: txq %d != bfs_txq %d!\n", 2460239051Sadrian __func__, 2461239051Sadrian txq->axq_qnum, 2462239051Sadrian bf->bf_state.bfs_txq->axq_qnum); 2463239051Sadrian } 2464239051Sadrian 2465227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2466236873Sadrian ATH_TID_LOCK_ASSERT(sc, tid); 2467227364Sadrian 2468227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2469227364Sadrian 2470227364Sadrian /* paused? queue */ 2471227364Sadrian if (tid->paused) { 2472236876Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2473233480Sadrian /* XXX don't sched - we're paused! */ 2474227364Sadrian return; 2475227364Sadrian } 2476227364Sadrian 2477227364Sadrian /* outside baw? queue */ 2478227364Sadrian if (bf->bf_state.bfs_dobaw && 2479227364Sadrian (! BAW_WITHIN(tap->txa_start, tap->txa_wnd, 2480227364Sadrian SEQNO(bf->bf_state.bfs_seqno)))) { 2481236878Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 2482227364Sadrian ath_tx_tid_sched(sc, tid); 2483227364Sadrian return; 2484227364Sadrian } 2485227364Sadrian 2486227364Sadrian /* Direct dispatch to hardware */ 2487227364Sadrian ath_tx_do_ratelookup(sc, bf); 2488233989Sadrian ath_tx_calc_duration(sc, bf); 2489233989Sadrian ath_tx_calc_protection(sc, bf); 2490233989Sadrian ath_tx_set_rtscts(sc, bf); 2491227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 2492227364Sadrian ath_tx_setds(sc, bf); 2493227364Sadrian 2494227364Sadrian /* Statistics */ 2495227364Sadrian sc->sc_aggr_stats.aggr_low_hwq_single_pkt++; 2496227364Sadrian 2497227364Sadrian /* Track per-TID hardware queue depth correctly */ 2498227364Sadrian tid->hwq_depth++; 2499227364Sadrian 2500227364Sadrian /* Add to BAW */ 2501227364Sadrian if (bf->bf_state.bfs_dobaw) { 2502227364Sadrian ath_tx_addto_baw(sc, an, tid, bf); 2503227364Sadrian bf->bf_state.bfs_addedbaw = 1; 2504227364Sadrian } 2505227364Sadrian 2506227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 2507227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 2508227364Sadrian 2509227364Sadrian /* Hand off to hardware */ 2510227364Sadrian ath_tx_handoff(sc, txq, bf); 2511227364Sadrian} 2512227364Sadrian 2513227364Sadrian/* 2514227364Sadrian * Attempt to send the packet. 2515227364Sadrian * If the queue isn't busy, direct-dispatch. 2516227364Sadrian * If the queue is busy enough, queue the given packet on the 2517227364Sadrian * relevant software queue. 2518227364Sadrian */ 2519227364Sadrianvoid 2520227364Sadrianath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni, struct ath_txq *txq, 2521227364Sadrian struct ath_buf *bf) 2522227364Sadrian{ 2523227364Sadrian struct ath_node *an = ATH_NODE(ni); 2524227364Sadrian struct ieee80211_frame *wh; 2525227364Sadrian struct ath_tid *atid; 2526227364Sadrian int pri, tid; 2527227364Sadrian struct mbuf *m0 = bf->bf_m; 2528227364Sadrian 2529236880Sadrian ATH_TXQ_LOCK_ASSERT(txq); 2530236880Sadrian 2531227364Sadrian /* Fetch the TID - non-QoS frames get assigned to TID 16 */ 2532227364Sadrian wh = mtod(m0, struct ieee80211_frame *); 2533227364Sadrian pri = ath_tx_getac(sc, m0); 2534227364Sadrian tid = ath_tx_gettid(sc, m0); 2535227364Sadrian atid = &an->an_tid[tid]; 2536227364Sadrian 2537236873Sadrian ATH_TID_LOCK_ASSERT(sc, atid); 2538236873Sadrian 2539236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n", 2540236872Sadrian __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh)); 2541227364Sadrian 2542227364Sadrian /* Set local packet state, used to queue packets to hardware */ 2543239051Sadrian /* XXX potentially duplicate info, re-check */ 2544239051Sadrian /* XXX remember, txq must be the hardware queue, not the av_mcastq */ 2545227364Sadrian bf->bf_state.bfs_tid = tid; 2546227364Sadrian bf->bf_state.bfs_txq = txq; 2547227364Sadrian bf->bf_state.bfs_pri = pri; 2548227364Sadrian 2549227364Sadrian /* 2550227364Sadrian * If the hardware queue isn't busy, queue it directly. 2551227364Sadrian * If the hardware queue is busy, queue it. 2552227364Sadrian * If the TID is paused or the traffic it outside BAW, software 2553227364Sadrian * queue it. 2554227364Sadrian */ 2555227364Sadrian if (atid->paused) { 2556227364Sadrian /* TID is paused, queue */ 2557236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__); 2558227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2559227364Sadrian } else if (ath_tx_ampdu_pending(sc, an, tid)) { 2560227364Sadrian /* AMPDU pending; queue */ 2561236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__); 2562227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2563227364Sadrian /* XXX sched? */ 2564227364Sadrian } else if (ath_tx_ampdu_running(sc, an, tid)) { 2565227364Sadrian /* AMPDU running, attempt direct dispatch if possible */ 2566236877Sadrian 2567236877Sadrian /* 2568236877Sadrian * Always queue the frame to the tail of the list. 2569236877Sadrian */ 2570236877Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2571236877Sadrian 2572236877Sadrian /* 2573236877Sadrian * If the hardware queue isn't busy, direct dispatch 2574236877Sadrian * the head frame in the list. Don't schedule the 2575236877Sadrian * TID - let it build some more frames first? 2576236877Sadrian * 2577236877Sadrian * Otherwise, schedule the TID. 2578236877Sadrian */ 2579229949Sadrian if (txq->axq_depth < sc->sc_hwq_limit) { 2580236877Sadrian bf = TAILQ_FIRST(&atid->axq_q); 2581236877Sadrian ATH_TXQ_REMOVE(atid, bf, bf_list); 2582239051Sadrian ath_tx_xmit_aggr(sc, an, txq, bf); 2583233227Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2584236872Sadrian "%s: xmit_aggr\n", 2585236872Sadrian __func__); 2586229949Sadrian } else { 2587229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 2588236872Sadrian "%s: ampdu; swq'ing\n", 2589236872Sadrian __func__); 2590227364Sadrian ath_tx_tid_sched(sc, atid); 2591227364Sadrian } 2592227364Sadrian } else if (txq->axq_depth < sc->sc_hwq_limit) { 2593227364Sadrian /* AMPDU not running, attempt direct dispatch */ 2594236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__); 2595227364Sadrian ath_tx_xmit_normal(sc, txq, bf); 2596227364Sadrian } else { 2597227364Sadrian /* Busy; queue */ 2598236872Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__); 2599227364Sadrian ATH_TXQ_INSERT_TAIL(atid, bf, bf_list); 2600227364Sadrian ath_tx_tid_sched(sc, atid); 2601227364Sadrian } 2602227364Sadrian} 2603227364Sadrian 2604227364Sadrian/* 2605227364Sadrian * Do the basic frame setup stuff that's required before the frame 2606227364Sadrian * is added to a software queue. 2607227364Sadrian * 2608227364Sadrian * All frames get mostly the same treatment and it's done once. 2609227364Sadrian * Retransmits fiddle with things like the rate control setup, 2610227364Sadrian * setting the retransmit bit in the packet; doing relevant DMA/bus 2611227364Sadrian * syncing and relinking it (back) into the hardware TX queue. 2612227364Sadrian * 2613227364Sadrian * Note that this may cause the mbuf to be reallocated, so 2614227364Sadrian * m0 may not be valid. 2615227364Sadrian */ 2616227364Sadrian 2617227364Sadrian 2618227364Sadrian/* 2619227364Sadrian * Configure the per-TID node state. 2620227364Sadrian * 2621227364Sadrian * This likely belongs in if_ath_node.c but I can't think of anywhere 2622227364Sadrian * else to put it just yet. 2623227364Sadrian * 2624227364Sadrian * This sets up the SLISTs and the mutex as appropriate. 2625227364Sadrian */ 2626227364Sadrianvoid 2627227364Sadrianath_tx_tid_init(struct ath_softc *sc, struct ath_node *an) 2628227364Sadrian{ 2629227364Sadrian int i, j; 2630227364Sadrian struct ath_tid *atid; 2631227364Sadrian 2632227364Sadrian for (i = 0; i < IEEE80211_TID_SIZE; i++) { 2633227364Sadrian atid = &an->an_tid[i]; 2634227364Sadrian TAILQ_INIT(&atid->axq_q); 2635227364Sadrian atid->tid = i; 2636227364Sadrian atid->an = an; 2637227364Sadrian for (j = 0; j < ATH_TID_MAX_BUFS; j++) 2638227364Sadrian atid->tx_buf[j] = NULL; 2639227364Sadrian atid->baw_head = atid->baw_tail = 0; 2640227364Sadrian atid->paused = 0; 2641227364Sadrian atid->sched = 0; 2642227364Sadrian atid->hwq_depth = 0; 2643227364Sadrian atid->cleanup_inprogress = 0; 2644227364Sadrian if (i == IEEE80211_NONQOS_TID) 2645227364Sadrian atid->ac = WME_AC_BE; 2646227364Sadrian else 2647227364Sadrian atid->ac = TID_TO_WME_AC(i); 2648227364Sadrian } 2649227364Sadrian} 2650227364Sadrian 2651227364Sadrian/* 2652227364Sadrian * Pause the current TID. This stops packets from being transmitted 2653227364Sadrian * on it. 2654227364Sadrian * 2655227364Sadrian * Since this is also called from upper layers as well as the driver, 2656227364Sadrian * it will get the TID lock. 2657227364Sadrian */ 2658227364Sadrianstatic void 2659227364Sadrianath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid) 2660227364Sadrian{ 2661233908Sadrian 2662233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2663227364Sadrian tid->paused++; 2664227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n", 2665227364Sadrian __func__, tid->paused); 2666227364Sadrian} 2667227364Sadrian 2668227364Sadrian/* 2669227364Sadrian * Unpause the current TID, and schedule it if needed. 2670227364Sadrian */ 2671227364Sadrianstatic void 2672227364Sadrianath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid) 2673227364Sadrian{ 2674227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2675227364Sadrian 2676227364Sadrian tid->paused--; 2677227364Sadrian 2678227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n", 2679227364Sadrian __func__, tid->paused); 2680227364Sadrian 2681227364Sadrian if (tid->paused || tid->axq_depth == 0) { 2682227364Sadrian return; 2683227364Sadrian } 2684227364Sadrian 2685227364Sadrian ath_tx_tid_sched(sc, tid); 2686227364Sadrian /* Punt some frames to the hardware if needed */ 2687233673Sadrian //ath_txq_sched(sc, sc->sc_ac2q[tid->ac]); 2688233673Sadrian taskqueue_enqueue(sc->sc_tq, &sc->sc_txqtask); 2689227364Sadrian} 2690227364Sadrian 2691227364Sadrian/* 2692233908Sadrian * Suspend the queue because we need to TX a BAR. 2693233908Sadrian */ 2694233908Sadrianstatic void 2695233908Sadrianath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid) 2696233908Sadrian{ 2697233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2698233908Sadrian 2699235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2700235676Sadrian "%s: tid=%p, bar_wait=%d, bar_tx=%d, called\n", 2701233908Sadrian __func__, 2702235676Sadrian tid, 2703235676Sadrian tid->bar_wait, 2704235676Sadrian tid->bar_tx); 2705233908Sadrian 2706233908Sadrian /* We shouldn't be called when bar_tx is 1 */ 2707233908Sadrian if (tid->bar_tx) { 2708233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx is 1?!\n", 2709233908Sadrian __func__); 2710233908Sadrian } 2711233908Sadrian 2712233908Sadrian /* If we've already been called, just be patient. */ 2713233908Sadrian if (tid->bar_wait) 2714233908Sadrian return; 2715233908Sadrian 2716233908Sadrian /* Wait! */ 2717233908Sadrian tid->bar_wait = 1; 2718233908Sadrian 2719233908Sadrian /* Only one pause, no matter how many frames fail */ 2720233908Sadrian ath_tx_tid_pause(sc, tid); 2721233908Sadrian} 2722233908Sadrian 2723233908Sadrian/* 2724233908Sadrian * We've finished with BAR handling - either we succeeded or 2725233908Sadrian * failed. Either way, unsuspend TX. 2726233908Sadrian */ 2727233908Sadrianstatic void 2728233908Sadrianath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid) 2729233908Sadrian{ 2730233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2731233908Sadrian 2732235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2733233908Sadrian "%s: tid=%p, called\n", 2734233908Sadrian __func__, 2735233908Sadrian tid); 2736233908Sadrian 2737233908Sadrian if (tid->bar_tx == 0 || tid->bar_wait == 0) { 2738233908Sadrian device_printf(sc->sc_dev, "%s: bar_tx=%d, bar_wait=%d: ?\n", 2739233908Sadrian __func__, tid->bar_tx, tid->bar_wait); 2740233908Sadrian } 2741233908Sadrian 2742233908Sadrian tid->bar_tx = tid->bar_wait = 0; 2743233908Sadrian ath_tx_tid_resume(sc, tid); 2744233908Sadrian} 2745233908Sadrian 2746233908Sadrian/* 2747233908Sadrian * Return whether we're ready to TX a BAR frame. 2748233908Sadrian * 2749233908Sadrian * Requires the TID lock be held. 2750233908Sadrian */ 2751233908Sadrianstatic int 2752233908Sadrianath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid) 2753233908Sadrian{ 2754233908Sadrian 2755233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2756233908Sadrian 2757233908Sadrian if (tid->bar_wait == 0 || tid->hwq_depth > 0) 2758233908Sadrian return (0); 2759233908Sadrian 2760235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, "%s: tid=%p (%d), bar ready\n", 2761235491Sadrian __func__, tid, tid->tid); 2762235491Sadrian 2763233908Sadrian return (1); 2764233908Sadrian} 2765233908Sadrian 2766233908Sadrian/* 2767233908Sadrian * Check whether the current TID is ready to have a BAR 2768233908Sadrian * TXed and if so, do the TX. 2769233908Sadrian * 2770233908Sadrian * Since the TID/TXQ lock can't be held during a call to 2771233908Sadrian * ieee80211_send_bar(), we have to do the dirty thing of unlocking it, 2772233908Sadrian * sending the BAR and locking it again. 2773233908Sadrian * 2774233908Sadrian * Eventually, the code to send the BAR should be broken out 2775233908Sadrian * from this routine so the lock doesn't have to be reacquired 2776233908Sadrian * just to be immediately dropped by the caller. 2777233908Sadrian */ 2778233908Sadrianstatic void 2779233908Sadrianath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid) 2780233908Sadrian{ 2781233908Sadrian struct ieee80211_tx_ampdu *tap; 2782233908Sadrian 2783233908Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2784233908Sadrian 2785235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2786233908Sadrian "%s: tid=%p, called\n", 2787233908Sadrian __func__, 2788233908Sadrian tid); 2789233908Sadrian 2790233908Sadrian tap = ath_tx_get_tx_tid(tid->an, tid->tid); 2791233908Sadrian 2792233908Sadrian /* 2793233908Sadrian * This is an error condition! 2794233908Sadrian */ 2795233908Sadrian if (tid->bar_wait == 0 || tid->bar_tx == 1) { 2796233908Sadrian device_printf(sc->sc_dev, 2797233908Sadrian "%s: tid=%p, bar_tx=%d, bar_wait=%d: ?\n", 2798233908Sadrian __func__, 2799233908Sadrian tid, 2800233908Sadrian tid->bar_tx, 2801233908Sadrian tid->bar_wait); 2802233908Sadrian return; 2803233908Sadrian } 2804233908Sadrian 2805233908Sadrian /* Don't do anything if we still have pending frames */ 2806233908Sadrian if (tid->hwq_depth > 0) { 2807235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2808233908Sadrian "%s: tid=%p, hwq_depth=%d, waiting\n", 2809233908Sadrian __func__, 2810233908Sadrian tid, 2811233908Sadrian tid->hwq_depth); 2812233908Sadrian return; 2813233908Sadrian } 2814233908Sadrian 2815233908Sadrian /* We're now about to TX */ 2816233908Sadrian tid->bar_tx = 1; 2817233908Sadrian 2818233908Sadrian /* 2819233908Sadrian * Calculate new BAW left edge, now that all frames have either 2820233908Sadrian * succeeded or failed. 2821233908Sadrian * 2822233908Sadrian * XXX verify this is _actually_ the valid value to begin at! 2823233908Sadrian */ 2824235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 2825233908Sadrian "%s: tid=%p, new BAW left edge=%d\n", 2826233908Sadrian __func__, 2827233908Sadrian tid, 2828233908Sadrian tap->txa_start); 2829233908Sadrian 2830233908Sadrian /* Try sending the BAR frame */ 2831233908Sadrian /* We can't hold the lock here! */ 2832233908Sadrian 2833233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 2834233908Sadrian if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) { 2835233908Sadrian /* Success? Now we wait for notification that it's done */ 2836233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2837233908Sadrian return; 2838233908Sadrian } 2839233908Sadrian 2840233908Sadrian /* Failure? For now, warn loudly and continue */ 2841233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 2842233908Sadrian device_printf(sc->sc_dev, "%s: tid=%p, failed to TX BAR, continue!\n", 2843233908Sadrian __func__, tid); 2844233908Sadrian ath_tx_tid_bar_unsuspend(sc, tid); 2845233908Sadrian} 2846233908Sadrian 2847233908Sadrian 2848233908Sadrian/* 2849227364Sadrian * Free any packets currently pending in the software TX queue. 2850227364Sadrian * 2851227364Sadrian * This will be called when a node is being deleted. 2852227364Sadrian * 2853227364Sadrian * It can also be called on an active node during an interface 2854227364Sadrian * reset or state transition. 2855227364Sadrian * 2856227364Sadrian * (From Linux/reference): 2857227364Sadrian * 2858227364Sadrian * TODO: For frame(s) that are in the retry state, we will reuse the 2859227364Sadrian * sequence number(s) without setting the retry bit. The 2860227364Sadrian * alternative is to give up on these and BAR the receiver's window 2861227364Sadrian * forward. 2862227364Sadrian */ 2863227364Sadrianstatic void 2864229949Sadrianath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an, 2865229949Sadrian struct ath_tid *tid, ath_bufhead *bf_cq) 2866227364Sadrian{ 2867227364Sadrian struct ath_buf *bf; 2868227364Sadrian struct ieee80211_tx_ampdu *tap; 2869227364Sadrian struct ieee80211_node *ni = &an->an_node; 2870227364Sadrian int t = 0; 2871227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 2872227364Sadrian 2873227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 2874227364Sadrian 2875227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[tid->ac]); 2876227364Sadrian 2877227364Sadrian /* Walk the queue, free frames */ 2878227364Sadrian for (;;) { 2879227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 2880227364Sadrian if (bf == NULL) { 2881227364Sadrian break; 2882227364Sadrian } 2883227364Sadrian 2884227364Sadrian if (t == 0) { 2885227364Sadrian device_printf(sc->sc_dev, 2886233330Sadrian "%s: node %p: bf=%p: addbaw=%d, dobaw=%d, " 2887236872Sadrian "seqno=%d, retry=%d\n", 2888233330Sadrian __func__, ni, bf, 2889233330Sadrian bf->bf_state.bfs_addedbaw, 2890233330Sadrian bf->bf_state.bfs_dobaw, 2891233480Sadrian SEQNO(bf->bf_state.bfs_seqno), 2892233480Sadrian bf->bf_state.bfs_retries); 2893233330Sadrian device_printf(sc->sc_dev, 2894235491Sadrian "%s: node %p: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d\n", 2895233480Sadrian __func__, ni, bf, 2896233480Sadrian tid->axq_depth, 2897235491Sadrian tid->hwq_depth, 2898235491Sadrian tid->bar_wait); 2899233480Sadrian device_printf(sc->sc_dev, 2900236872Sadrian "%s: node %p: tid %d: txq_depth=%d, " 2901227364Sadrian "txq_aggr_depth=%d, sched=%d, paused=%d, " 2902229949Sadrian "hwq_depth=%d, incomp=%d, baw_head=%d, " 2903229949Sadrian "baw_tail=%d txa_start=%d, ni_txseqs=%d\n", 2904236872Sadrian __func__, ni, tid->tid, txq->axq_depth, 2905227364Sadrian txq->axq_aggr_depth, tid->sched, tid->paused, 2906227364Sadrian tid->hwq_depth, tid->incomp, tid->baw_head, 2907227364Sadrian tid->baw_tail, tap == NULL ? -1 : tap->txa_start, 2908227364Sadrian ni->ni_txseqs[tid->tid]); 2909229165Sadrian 2910229165Sadrian /* XXX Dump the frame, see what it is? */ 2911229165Sadrian ieee80211_dump_pkt(ni->ni_ic, 2912229165Sadrian mtod(bf->bf_m, const uint8_t *), 2913229165Sadrian bf->bf_m->m_len, 0, -1); 2914229165Sadrian 2915233897Sadrian t = 1; 2916227364Sadrian } 2917227364Sadrian 2918227364Sadrian 2919227364Sadrian /* 2920227364Sadrian * If the current TID is running AMPDU, update 2921227364Sadrian * the BAW. 2922227364Sadrian */ 2923227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid) && 2924227364Sadrian bf->bf_state.bfs_dobaw) { 2925227364Sadrian /* 2926227364Sadrian * Only remove the frame from the BAW if it's 2927227364Sadrian * been transmitted at least once; this means 2928227364Sadrian * the frame was in the BAW to begin with. 2929227364Sadrian */ 2930227364Sadrian if (bf->bf_state.bfs_retries > 0) { 2931227364Sadrian ath_tx_update_baw(sc, an, tid, bf); 2932227364Sadrian bf->bf_state.bfs_dobaw = 0; 2933227364Sadrian } 2934227364Sadrian /* 2935227364Sadrian * This has become a non-fatal error now 2936227364Sadrian */ 2937227364Sadrian if (! bf->bf_state.bfs_addedbaw) 2938227364Sadrian device_printf(sc->sc_dev, 2939227364Sadrian "%s: wasn't added: seqno %d\n", 2940227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 2941227364Sadrian } 2942227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 2943227364Sadrian TAILQ_INSERT_TAIL(bf_cq, bf, bf_list); 2944227364Sadrian } 2945227364Sadrian 2946227364Sadrian /* 2947227364Sadrian * Now that it's completed, grab the TID lock and update 2948227364Sadrian * the sequence number and BAW window. 2949227364Sadrian * Because sequence numbers have been assigned to frames 2950227364Sadrian * that haven't been sent yet, it's entirely possible 2951227364Sadrian * we'll be called with some pending frames that have not 2952227364Sadrian * been transmitted. 2953227364Sadrian * 2954227364Sadrian * The cleaner solution is to do the sequence number allocation 2955227364Sadrian * when the packet is first transmitted - and thus the "retries" 2956227364Sadrian * check above would be enough to update the BAW/seqno. 2957227364Sadrian */ 2958227364Sadrian 2959227364Sadrian /* But don't do it for non-QoS TIDs */ 2960227364Sadrian if (tap) { 2961227364Sadrian#if 0 2962227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 2963227364Sadrian "%s: node %p: TID %d: sliding BAW left edge to %d\n", 2964227364Sadrian __func__, an, tid->tid, tap->txa_start); 2965227364Sadrian#endif 2966227364Sadrian ni->ni_txseqs[tid->tid] = tap->txa_start; 2967227364Sadrian tid->baw_tail = tid->baw_head; 2968227364Sadrian } 2969227364Sadrian} 2970227364Sadrian 2971227364Sadrian/* 2972227364Sadrian * Flush all software queued packets for the given node. 2973227364Sadrian * 2974227364Sadrian * This occurs when a completion handler frees the last buffer 2975227364Sadrian * for a node, and the node is thus freed. This causes the node 2976227364Sadrian * to be cleaned up, which ends up calling ath_tx_node_flush. 2977227364Sadrian */ 2978227364Sadrianvoid 2979227364Sadrianath_tx_node_flush(struct ath_softc *sc, struct ath_node *an) 2980227364Sadrian{ 2981227364Sadrian int tid; 2982227364Sadrian ath_bufhead bf_cq; 2983227364Sadrian struct ath_buf *bf; 2984227364Sadrian 2985227364Sadrian TAILQ_INIT(&bf_cq); 2986227364Sadrian 2987227364Sadrian for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) { 2988227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 2989227364Sadrian struct ath_txq *txq = sc->sc_ac2q[atid->ac]; 2990227364Sadrian 2991227364Sadrian /* Remove this tid from the list of active tids */ 2992227364Sadrian ATH_TXQ_LOCK(txq); 2993227364Sadrian ath_tx_tid_unsched(sc, atid); 2994227364Sadrian 2995227364Sadrian /* Free packets */ 2996227364Sadrian ath_tx_tid_drain(sc, an, atid, &bf_cq); 2997227364Sadrian ATH_TXQ_UNLOCK(txq); 2998227364Sadrian } 2999227364Sadrian 3000227364Sadrian /* Handle completed frames */ 3001227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3002227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3003227364Sadrian ath_tx_default_comp(sc, bf, 0); 3004227364Sadrian } 3005227364Sadrian} 3006227364Sadrian 3007227364Sadrian/* 3008227364Sadrian * Drain all the software TXQs currently with traffic queued. 3009227364Sadrian */ 3010227364Sadrianvoid 3011227364Sadrianath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq) 3012227364Sadrian{ 3013227364Sadrian struct ath_tid *tid; 3014227364Sadrian ath_bufhead bf_cq; 3015227364Sadrian struct ath_buf *bf; 3016227364Sadrian 3017227364Sadrian TAILQ_INIT(&bf_cq); 3018227364Sadrian ATH_TXQ_LOCK(txq); 3019227364Sadrian 3020227364Sadrian /* 3021227364Sadrian * Iterate over all active tids for the given txq, 3022227364Sadrian * flushing and unsched'ing them 3023227364Sadrian */ 3024227364Sadrian while (! TAILQ_EMPTY(&txq->axq_tidq)) { 3025227364Sadrian tid = TAILQ_FIRST(&txq->axq_tidq); 3026227364Sadrian ath_tx_tid_drain(sc, tid->an, tid, &bf_cq); 3027227364Sadrian ath_tx_tid_unsched(sc, tid); 3028227364Sadrian } 3029227364Sadrian 3030227364Sadrian ATH_TXQ_UNLOCK(txq); 3031227364Sadrian 3032227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3033227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3034227364Sadrian ath_tx_default_comp(sc, bf, 0); 3035227364Sadrian } 3036227364Sadrian} 3037227364Sadrian 3038227364Sadrian/* 3039227364Sadrian * Handle completion of non-aggregate session frames. 3040227364Sadrian */ 3041227364Sadrianvoid 3042227364Sadrianath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3043227364Sadrian{ 3044227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3045227364Sadrian struct ath_node *an = ATH_NODE(ni); 3046227364Sadrian int tid = bf->bf_state.bfs_tid; 3047227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3048227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3049227364Sadrian 3050227364Sadrian /* The TID state is protected behind the TXQ lock */ 3051227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3052227364Sadrian 3053227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n", 3054227364Sadrian __func__, bf, fail, atid->hwq_depth - 1); 3055227364Sadrian 3056227364Sadrian atid->hwq_depth--; 3057227364Sadrian if (atid->hwq_depth < 0) 3058227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3059227364Sadrian __func__, atid->hwq_depth); 3060227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3061227364Sadrian 3062227364Sadrian /* 3063227364Sadrian * punt to rate control if we're not being cleaned up 3064227364Sadrian * during a hw queue drain and the frame wanted an ACK. 3065227364Sadrian */ 3066233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3067227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3068227364Sadrian ts, bf->bf_state.bfs_pktlen, 3069227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3070227364Sadrian 3071227364Sadrian ath_tx_default_comp(sc, bf, fail); 3072227364Sadrian} 3073227364Sadrian 3074227364Sadrian/* 3075227364Sadrian * Handle cleanup of aggregate session packets that aren't 3076227364Sadrian * an A-MPDU. 3077227364Sadrian * 3078227364Sadrian * There's no need to update the BAW here - the session is being 3079227364Sadrian * torn down. 3080227364Sadrian */ 3081227364Sadrianstatic void 3082227364Sadrianath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3083227364Sadrian{ 3084227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3085227364Sadrian struct ath_node *an = ATH_NODE(ni); 3086227364Sadrian int tid = bf->bf_state.bfs_tid; 3087227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3088227364Sadrian 3089227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n", 3090227364Sadrian __func__, tid, atid->incomp); 3091227364Sadrian 3092227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3093227364Sadrian atid->incomp--; 3094227364Sadrian if (atid->incomp == 0) { 3095227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3096227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3097227364Sadrian __func__, tid); 3098227364Sadrian atid->cleanup_inprogress = 0; 3099227364Sadrian ath_tx_tid_resume(sc, atid); 3100227364Sadrian } 3101227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3102227364Sadrian 3103227364Sadrian ath_tx_default_comp(sc, bf, 0); 3104227364Sadrian} 3105227364Sadrian 3106227364Sadrian/* 3107227364Sadrian * Performs transmit side cleanup when TID changes from aggregated to 3108227364Sadrian * unaggregated. 3109227364Sadrian * 3110227364Sadrian * - Discard all retry frames from the s/w queue. 3111227364Sadrian * - Fix the tx completion function for all buffers in s/w queue. 3112227364Sadrian * - Count the number of unacked frames, and let transmit completion 3113227364Sadrian * handle it later. 3114227364Sadrian * 3115227364Sadrian * The caller is responsible for pausing the TID. 3116227364Sadrian */ 3117227364Sadrianstatic void 3118235749Sadrianath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid) 3119227364Sadrian{ 3120227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3121227364Sadrian struct ieee80211_tx_ampdu *tap; 3122227364Sadrian struct ath_buf *bf, *bf_next; 3123227364Sadrian ath_bufhead bf_cq; 3124227364Sadrian 3125235774Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAW, 3126227364Sadrian "%s: TID %d: called\n", __func__, tid); 3127227364Sadrian 3128227364Sadrian TAILQ_INIT(&bf_cq); 3129227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3130227364Sadrian 3131227364Sadrian /* 3132227364Sadrian * Update the frames in the software TX queue: 3133227364Sadrian * 3134227364Sadrian * + Discard retry frames in the queue 3135227364Sadrian * + Fix the completion function to be non-aggregate 3136227364Sadrian */ 3137227364Sadrian bf = TAILQ_FIRST(&atid->axq_q); 3138227364Sadrian while (bf) { 3139227364Sadrian if (bf->bf_state.bfs_isretried) { 3140227364Sadrian bf_next = TAILQ_NEXT(bf, bf_list); 3141227364Sadrian TAILQ_REMOVE(&atid->axq_q, bf, bf_list); 3142227364Sadrian atid->axq_depth--; 3143227364Sadrian if (bf->bf_state.bfs_dobaw) { 3144227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3145227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3146227364Sadrian device_printf(sc->sc_dev, 3147227364Sadrian "%s: wasn't added: seqno %d\n", 3148229949Sadrian __func__, 3149229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3150227364Sadrian } 3151227364Sadrian bf->bf_state.bfs_dobaw = 0; 3152227364Sadrian /* 3153227364Sadrian * Call the default completion handler with "fail" just 3154227364Sadrian * so upper levels are suitably notified about this. 3155227364Sadrian */ 3156227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3157227364Sadrian bf = bf_next; 3158227364Sadrian continue; 3159227364Sadrian } 3160227364Sadrian /* Give these the default completion handler */ 3161227364Sadrian bf->bf_comp = ath_tx_normal_comp; 3162227364Sadrian bf = TAILQ_NEXT(bf, bf_list); 3163227364Sadrian } 3164227364Sadrian 3165227364Sadrian /* The caller is required to pause the TID */ 3166227364Sadrian#if 0 3167227364Sadrian /* Pause the TID */ 3168227364Sadrian ath_tx_tid_pause(sc, atid); 3169227364Sadrian#endif 3170227364Sadrian 3171227364Sadrian /* 3172227364Sadrian * Calculate what hardware-queued frames exist based 3173227364Sadrian * on the current BAW size. Ie, what frames have been 3174227364Sadrian * added to the TX hardware queue for this TID but 3175227364Sadrian * not yet ACKed. 3176227364Sadrian */ 3177227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3178227364Sadrian /* Need the lock - fiddling with BAW */ 3179227364Sadrian while (atid->baw_head != atid->baw_tail) { 3180227364Sadrian if (atid->tx_buf[atid->baw_head]) { 3181227364Sadrian atid->incomp++; 3182227364Sadrian atid->cleanup_inprogress = 1; 3183227364Sadrian atid->tx_buf[atid->baw_head] = NULL; 3184227364Sadrian } 3185227364Sadrian INCR(atid->baw_head, ATH_TID_MAX_BUFS); 3186227364Sadrian INCR(tap->txa_start, IEEE80211_SEQ_RANGE); 3187227364Sadrian } 3188227364Sadrian 3189227364Sadrian /* 3190227364Sadrian * If cleanup is required, defer TID scheduling 3191227364Sadrian * until all the HW queued packets have been 3192227364Sadrian * sent. 3193227364Sadrian */ 3194227364Sadrian if (! atid->cleanup_inprogress) 3195227364Sadrian ath_tx_tid_resume(sc, atid); 3196227364Sadrian 3197227364Sadrian if (atid->cleanup_inprogress) 3198227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3199227364Sadrian "%s: TID %d: cleanup needed: %d packets\n", 3200227364Sadrian __func__, tid, atid->incomp); 3201227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3202227364Sadrian 3203227364Sadrian /* Handle completing frames and fail them */ 3204227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3205227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3206227364Sadrian ath_tx_default_comp(sc, bf, 1); 3207227364Sadrian } 3208227364Sadrian} 3209227364Sadrian 3210227364Sadrianstatic void 3211227364Sadrianath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) 3212227364Sadrian{ 3213227364Sadrian struct ieee80211_frame *wh; 3214227364Sadrian 3215227364Sadrian wh = mtod(bf->bf_m, struct ieee80211_frame *); 3216227364Sadrian /* Only update/resync if needed */ 3217227364Sadrian if (bf->bf_state.bfs_isretried == 0) { 3218227364Sadrian wh->i_fc[1] |= IEEE80211_FC1_RETRY; 3219227364Sadrian bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 3220227364Sadrian BUS_DMASYNC_PREWRITE); 3221227364Sadrian } 3222227364Sadrian sc->sc_stats.ast_tx_swretries++; 3223227364Sadrian bf->bf_state.bfs_isretried = 1; 3224227364Sadrian bf->bf_state.bfs_retries ++; 3225227364Sadrian} 3226227364Sadrian 3227227364Sadrianstatic struct ath_buf * 3228227398Sadrianath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an, 3229227398Sadrian struct ath_tid *tid, struct ath_buf *bf) 3230227364Sadrian{ 3231227364Sadrian struct ath_buf *nbf; 3232227364Sadrian int error; 3233227364Sadrian 3234227364Sadrian nbf = ath_buf_clone(sc, bf); 3235227364Sadrian 3236227364Sadrian#if 0 3237227364Sadrian device_printf(sc->sc_dev, "%s: ATH_BUF_BUSY; cloning\n", 3238227364Sadrian __func__); 3239227364Sadrian#endif 3240227364Sadrian 3241227364Sadrian if (nbf == NULL) { 3242227364Sadrian /* Failed to clone */ 3243227364Sadrian device_printf(sc->sc_dev, 3244227364Sadrian "%s: failed to clone a busy buffer\n", 3245227364Sadrian __func__); 3246227364Sadrian return NULL; 3247227364Sadrian } 3248227364Sadrian 3249227364Sadrian /* Setup the dma for the new buffer */ 3250227364Sadrian error = ath_tx_dmasetup(sc, nbf, nbf->bf_m); 3251227364Sadrian if (error != 0) { 3252227364Sadrian device_printf(sc->sc_dev, 3253227364Sadrian "%s: failed to setup dma for clone\n", 3254227364Sadrian __func__); 3255227364Sadrian /* 3256227364Sadrian * Put this at the head of the list, not tail; 3257227364Sadrian * that way it doesn't interfere with the 3258227364Sadrian * busy buffer logic (which uses the tail of 3259227364Sadrian * the list.) 3260227364Sadrian */ 3261227364Sadrian ATH_TXBUF_LOCK(sc); 3262236994Sadrian ath_returnbuf_head(sc, nbf); 3263227364Sadrian ATH_TXBUF_UNLOCK(sc); 3264227364Sadrian return NULL; 3265227364Sadrian } 3266227364Sadrian 3267227398Sadrian /* Update BAW if required, before we free the original buf */ 3268227398Sadrian if (bf->bf_state.bfs_dobaw) 3269227398Sadrian ath_tx_switch_baw_buf(sc, an, tid, bf, nbf); 3270227398Sadrian 3271227364Sadrian /* Free current buffer; return the older buffer */ 3272227364Sadrian bf->bf_m = NULL; 3273227364Sadrian bf->bf_node = NULL; 3274227364Sadrian ath_freebuf(sc, bf); 3275227364Sadrian return nbf; 3276227364Sadrian} 3277227364Sadrian 3278227364Sadrian/* 3279227364Sadrian * Handle retrying an unaggregate frame in an aggregate 3280227364Sadrian * session. 3281227364Sadrian * 3282227364Sadrian * If too many retries occur, pause the TID, wait for 3283227364Sadrian * any further retransmits (as there's no reason why 3284227364Sadrian * non-aggregate frames in an aggregate session are 3285227364Sadrian * transmitted in-order; they just have to be in-BAW) 3286227364Sadrian * and then queue a BAR. 3287227364Sadrian */ 3288227364Sadrianstatic void 3289227364Sadrianath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf) 3290227364Sadrian{ 3291227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3292227364Sadrian struct ath_node *an = ATH_NODE(ni); 3293227364Sadrian int tid = bf->bf_state.bfs_tid; 3294227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3295227364Sadrian struct ieee80211_tx_ampdu *tap; 3296227364Sadrian 3297227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3298227364Sadrian 3299227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3300227364Sadrian 3301227364Sadrian /* 3302227364Sadrian * If the buffer is marked as busy, we can't directly 3303227364Sadrian * reuse it. Instead, try to clone the buffer. 3304227364Sadrian * If the clone is successful, recycle the old buffer. 3305227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3306227364Sadrian * to force the next bit of code to free the buffer 3307227364Sadrian * for us. 3308227364Sadrian */ 3309227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3310227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3311227364Sadrian struct ath_buf *nbf; 3312227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3313227364Sadrian if (nbf) 3314227364Sadrian /* bf has been freed at this point */ 3315227364Sadrian bf = nbf; 3316227364Sadrian else 3317227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3318227364Sadrian } 3319227364Sadrian 3320227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3321227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3322227364Sadrian "%s: exceeded retries; seqno %d\n", 3323227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3324227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3325227364Sadrian 3326227364Sadrian /* Update BAW anyway */ 3327227364Sadrian if (bf->bf_state.bfs_dobaw) { 3328227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3329227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3330227364Sadrian device_printf(sc->sc_dev, 3331227364Sadrian "%s: wasn't added: seqno %d\n", 3332227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3333227364Sadrian } 3334227364Sadrian bf->bf_state.bfs_dobaw = 0; 3335227364Sadrian 3336233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3337233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3338227364Sadrian 3339233908Sadrian /* Send the BAR if there are no other frames waiting */ 3340233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3341233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3342227364Sadrian 3343233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3344227364Sadrian 3345227364Sadrian /* Free buffer, bf is free after this call */ 3346227364Sadrian ath_tx_default_comp(sc, bf, 0); 3347227364Sadrian return; 3348227364Sadrian } 3349227364Sadrian 3350227364Sadrian /* 3351227364Sadrian * This increments the retry counter as well as 3352227364Sadrian * sets the retry flag in the ath_buf and packet 3353227364Sadrian * body. 3354227364Sadrian */ 3355227364Sadrian ath_tx_set_retry(sc, bf); 3356227364Sadrian 3357227364Sadrian /* 3358227364Sadrian * Insert this at the head of the queue, so it's 3359227364Sadrian * retried before any current/subsequent frames. 3360227364Sadrian */ 3361227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3362227364Sadrian ath_tx_tid_sched(sc, atid); 3363233908Sadrian /* Send the BAR if there are no other frames waiting */ 3364233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3365233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3366227364Sadrian 3367227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3368227364Sadrian} 3369227364Sadrian 3370227364Sadrian/* 3371227364Sadrian * Common code for aggregate excessive retry/subframe retry. 3372227364Sadrian * If retrying, queues buffers to bf_q. If not, frees the 3373227364Sadrian * buffers. 3374227364Sadrian * 3375227364Sadrian * XXX should unify this with ath_tx_aggr_retry_unaggr() 3376227364Sadrian */ 3377227364Sadrianstatic int 3378227364Sadrianath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf, 3379227364Sadrian ath_bufhead *bf_q) 3380227364Sadrian{ 3381227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3382227364Sadrian struct ath_node *an = ATH_NODE(ni); 3383227364Sadrian int tid = bf->bf_state.bfs_tid; 3384227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3385227364Sadrian 3386227364Sadrian ATH_TXQ_LOCK_ASSERT(sc->sc_ac2q[atid->ac]); 3387227364Sadrian 3388227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3389227364Sadrian ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0); 3390227364Sadrian /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */ 3391227364Sadrian 3392227364Sadrian /* 3393227364Sadrian * If the buffer is marked as busy, we can't directly 3394227364Sadrian * reuse it. Instead, try to clone the buffer. 3395227364Sadrian * If the clone is successful, recycle the old buffer. 3396227364Sadrian * If the clone is unsuccessful, set bfs_retries to max 3397227364Sadrian * to force the next bit of code to free the buffer 3398227364Sadrian * for us. 3399227364Sadrian */ 3400227364Sadrian if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) && 3401227364Sadrian (bf->bf_flags & ATH_BUF_BUSY)) { 3402227364Sadrian struct ath_buf *nbf; 3403227398Sadrian nbf = ath_tx_retry_clone(sc, an, atid, bf); 3404227364Sadrian if (nbf) 3405227364Sadrian /* bf has been freed at this point */ 3406227364Sadrian bf = nbf; 3407227364Sadrian else 3408227364Sadrian bf->bf_state.bfs_retries = SWMAX_RETRIES + 1; 3409227364Sadrian } 3410227364Sadrian 3411227364Sadrian if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) { 3412227364Sadrian sc->sc_stats.ast_tx_swretrymax++; 3413227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES, 3414227364Sadrian "%s: max retries: seqno %d\n", 3415227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3416227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3417227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3418227364Sadrian device_printf(sc->sc_dev, 3419227364Sadrian "%s: wasn't added: seqno %d\n", 3420227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3421227364Sadrian bf->bf_state.bfs_dobaw = 0; 3422227364Sadrian return 1; 3423227364Sadrian } 3424227364Sadrian 3425227364Sadrian ath_tx_set_retry(sc, bf); 3426227364Sadrian bf->bf_next = NULL; /* Just to make sure */ 3427227364Sadrian 3428227364Sadrian TAILQ_INSERT_TAIL(bf_q, bf, bf_list); 3429227364Sadrian return 0; 3430227364Sadrian} 3431227364Sadrian 3432227364Sadrian/* 3433227364Sadrian * error pkt completion for an aggregate destination 3434227364Sadrian */ 3435227364Sadrianstatic void 3436227364Sadrianath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first, 3437227364Sadrian struct ath_tid *tid) 3438227364Sadrian{ 3439227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3440227364Sadrian struct ath_node *an = ATH_NODE(ni); 3441227364Sadrian struct ath_buf *bf_next, *bf; 3442227364Sadrian ath_bufhead bf_q; 3443227364Sadrian int drops = 0; 3444227364Sadrian struct ieee80211_tx_ampdu *tap; 3445227364Sadrian ath_bufhead bf_cq; 3446227364Sadrian 3447227364Sadrian TAILQ_INIT(&bf_q); 3448227364Sadrian TAILQ_INIT(&bf_cq); 3449227364Sadrian 3450227364Sadrian /* 3451227364Sadrian * Update rate control - all frames have failed. 3452227364Sadrian * 3453227364Sadrian * XXX use the length in the first frame in the series; 3454227364Sadrian * XXX just so things are consistent for now. 3455227364Sadrian */ 3456227364Sadrian ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc, 3457227364Sadrian &bf_first->bf_status.ds_txstat, 3458227364Sadrian bf_first->bf_state.bfs_pktlen, 3459227364Sadrian bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes); 3460227364Sadrian 3461227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[tid->ac]); 3462227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3463227868Sadrian sc->sc_stats.ast_tx_aggr_failall++; 3464227364Sadrian 3465227364Sadrian /* Retry all subframes */ 3466227364Sadrian bf = bf_first; 3467227364Sadrian while (bf) { 3468227364Sadrian bf_next = bf->bf_next; 3469227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3470227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3471227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3472227364Sadrian drops++; 3473227364Sadrian bf->bf_next = NULL; 3474227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3475227364Sadrian } 3476227364Sadrian bf = bf_next; 3477227364Sadrian } 3478227364Sadrian 3479227364Sadrian /* Prepend all frames to the beginning of the queue */ 3480227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3481227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3482227364Sadrian ATH_TXQ_INSERT_HEAD(tid, bf, bf_list); 3483227364Sadrian } 3484227364Sadrian 3485234725Sadrian /* 3486234725Sadrian * Schedule the TID to be re-tried. 3487234725Sadrian */ 3488227364Sadrian ath_tx_tid_sched(sc, tid); 3489227364Sadrian 3490227364Sadrian /* 3491227364Sadrian * send bar if we dropped any frames 3492227364Sadrian * 3493227364Sadrian * Keep the txq lock held for now, as we need to ensure 3494227364Sadrian * that ni_txseqs[] is consistent (as it's being updated 3495227364Sadrian * in the ifnet TX context or raw TX context.) 3496227364Sadrian */ 3497227364Sadrian if (drops) { 3498233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3499233908Sadrian ath_tx_tid_bar_suspend(sc, tid); 3500227364Sadrian } 3501227364Sadrian 3502233908Sadrian /* 3503233908Sadrian * Send BAR if required 3504233908Sadrian */ 3505233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, tid)) 3506233908Sadrian ath_tx_tid_bar_tx(sc, tid); 3507233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[tid->ac]); 3508233908Sadrian 3509227364Sadrian /* Complete frames which errored out */ 3510227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3511227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3512227364Sadrian ath_tx_default_comp(sc, bf, 0); 3513227364Sadrian } 3514227364Sadrian} 3515227364Sadrian 3516227364Sadrian/* 3517227364Sadrian * Handle clean-up of packets from an aggregate list. 3518227364Sadrian * 3519227364Sadrian * There's no need to update the BAW here - the session is being 3520227364Sadrian * torn down. 3521227364Sadrian */ 3522227364Sadrianstatic void 3523227364Sadrianath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first) 3524227364Sadrian{ 3525227364Sadrian struct ath_buf *bf, *bf_next; 3526227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3527227364Sadrian struct ath_node *an = ATH_NODE(ni); 3528227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3529227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3530227364Sadrian 3531227364Sadrian bf = bf_first; 3532227364Sadrian 3533227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3534227364Sadrian 3535227364Sadrian /* update incomp */ 3536227364Sadrian while (bf) { 3537227364Sadrian atid->incomp--; 3538227364Sadrian bf = bf->bf_next; 3539227364Sadrian } 3540227364Sadrian 3541227364Sadrian if (atid->incomp == 0) { 3542227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 3543227364Sadrian "%s: TID %d: cleaned up! resume!\n", 3544227364Sadrian __func__, tid); 3545227364Sadrian atid->cleanup_inprogress = 0; 3546227364Sadrian ath_tx_tid_resume(sc, atid); 3547227364Sadrian } 3548233908Sadrian 3549233908Sadrian /* Send BAR if required */ 3550233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3551233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3552227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3553227364Sadrian 3554227364Sadrian /* Handle frame completion */ 3555227364Sadrian while (bf) { 3556227364Sadrian bf_next = bf->bf_next; 3557227364Sadrian ath_tx_default_comp(sc, bf, 1); 3558227364Sadrian bf = bf_next; 3559227364Sadrian } 3560227364Sadrian} 3561227364Sadrian 3562227364Sadrian/* 3563227364Sadrian * Handle completion of an set of aggregate frames. 3564227364Sadrian * 3565227364Sadrian * XXX for now, simply complete each sub-frame. 3566227364Sadrian * 3567227364Sadrian * Note: the completion handler is the last descriptor in the aggregate, 3568227364Sadrian * not the last descriptor in the first frame. 3569227364Sadrian */ 3570227364Sadrianstatic void 3571229949Sadrianath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first, 3572229949Sadrian int fail) 3573227364Sadrian{ 3574227364Sadrian //struct ath_desc *ds = bf->bf_lastds; 3575227364Sadrian struct ieee80211_node *ni = bf_first->bf_node; 3576227364Sadrian struct ath_node *an = ATH_NODE(ni); 3577227364Sadrian int tid = bf_first->bf_state.bfs_tid; 3578227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3579227364Sadrian struct ath_tx_status ts; 3580227364Sadrian struct ieee80211_tx_ampdu *tap; 3581227364Sadrian ath_bufhead bf_q; 3582227364Sadrian ath_bufhead bf_cq; 3583227364Sadrian int seq_st, tx_ok; 3584227364Sadrian int hasba, isaggr; 3585227364Sadrian uint32_t ba[2]; 3586227364Sadrian struct ath_buf *bf, *bf_next; 3587227364Sadrian int ba_index; 3588227364Sadrian int drops = 0; 3589227364Sadrian int nframes = 0, nbad = 0, nf; 3590227364Sadrian int pktlen; 3591227364Sadrian /* XXX there's too much on the stack? */ 3592236038Sadrian struct ath_rc_series rc[ATH_RC_NUM]; 3593227364Sadrian int txseq; 3594227364Sadrian 3595227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n", 3596227364Sadrian __func__, atid->hwq_depth); 3597227364Sadrian 3598227364Sadrian /* The TID state is kept behind the TXQ lock */ 3599227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3600227364Sadrian 3601227364Sadrian atid->hwq_depth--; 3602227364Sadrian if (atid->hwq_depth < 0) 3603227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3604227364Sadrian __func__, atid->hwq_depth); 3605227364Sadrian 3606227364Sadrian /* 3607227364Sadrian * Punt cleanup to the relevant function, not our problem now 3608227364Sadrian */ 3609227364Sadrian if (atid->cleanup_inprogress) { 3610227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3611227364Sadrian ath_tx_comp_cleanup_aggr(sc, bf_first); 3612227364Sadrian return; 3613227364Sadrian } 3614227364Sadrian 3615227364Sadrian /* 3616227364Sadrian * Take a copy; this may be needed -after- bf_first 3617227364Sadrian * has been completed and freed. 3618227364Sadrian */ 3619227364Sadrian ts = bf_first->bf_status.ds_txstat; 3620227364Sadrian /* 3621227364Sadrian * XXX for now, use the first frame in the aggregate for 3622227364Sadrian * XXX rate control completion; it's at least consistent. 3623227364Sadrian */ 3624227364Sadrian pktlen = bf_first->bf_state.bfs_pktlen; 3625227364Sadrian 3626227364Sadrian /* 3627235461Sadrian * Handle errors first! 3628235461Sadrian * 3629235461Sadrian * Here, handle _any_ error as a "exceeded retries" error. 3630235461Sadrian * Later on (when filtered frames are to be specially handled) 3631235461Sadrian * it'll have to be expanded. 3632227364Sadrian */ 3633235461Sadrian#if 0 3634227364Sadrian if (ts.ts_status & HAL_TXERR_XRETRY) { 3635235461Sadrian#endif 3636235461Sadrian if (ts.ts_status != 0) { 3637227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3638227364Sadrian ath_tx_comp_aggr_error(sc, bf_first, atid); 3639227364Sadrian return; 3640227364Sadrian } 3641227364Sadrian 3642227364Sadrian TAILQ_INIT(&bf_q); 3643227364Sadrian TAILQ_INIT(&bf_cq); 3644227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 3645227364Sadrian 3646227364Sadrian /* 3647227364Sadrian * extract starting sequence and block-ack bitmap 3648227364Sadrian */ 3649227364Sadrian /* XXX endian-ness of seq_st, ba? */ 3650227364Sadrian seq_st = ts.ts_seqnum; 3651227364Sadrian hasba = !! (ts.ts_flags & HAL_TX_BA); 3652227364Sadrian tx_ok = (ts.ts_status == 0); 3653227364Sadrian isaggr = bf_first->bf_state.bfs_aggr; 3654227364Sadrian ba[0] = ts.ts_ba_low; 3655227364Sadrian ba[1] = ts.ts_ba_high; 3656227364Sadrian 3657227364Sadrian /* 3658227364Sadrian * Copy the TX completion status and the rate control 3659227364Sadrian * series from the first descriptor, as it may be freed 3660227364Sadrian * before the rate control code can get its grubby fingers 3661227364Sadrian * into things. 3662227364Sadrian */ 3663227364Sadrian memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc)); 3664227364Sadrian 3665227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3666229949Sadrian "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, " 3667229949Sadrian "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n", 3668227364Sadrian __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags, 3669227364Sadrian isaggr, seq_st, hasba, ba[0], ba[1]); 3670227364Sadrian 3671227364Sadrian /* Occasionally, the MAC sends a tx status for the wrong TID. */ 3672227364Sadrian if (tid != ts.ts_tid) { 3673227364Sadrian device_printf(sc->sc_dev, "%s: tid %d != hw tid %d\n", 3674227364Sadrian __func__, tid, ts.ts_tid); 3675227364Sadrian tx_ok = 0; 3676227364Sadrian } 3677227364Sadrian 3678227364Sadrian /* AR5416 BA bug; this requires an interface reset */ 3679227364Sadrian if (isaggr && tx_ok && (! hasba)) { 3680227364Sadrian device_printf(sc->sc_dev, 3681229949Sadrian "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, " 3682229949Sadrian "seq_st=%d\n", 3683227364Sadrian __func__, hasba, tx_ok, isaggr, seq_st); 3684227364Sadrian /* XXX TODO: schedule an interface reset */ 3685238350Sjhb#ifdef ATH_DEBUG 3686238338Sadrian ath_printtxbuf(sc, bf_first, 3687238338Sadrian sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0); 3688238350Sjhb#endif 3689227364Sadrian } 3690227364Sadrian 3691227364Sadrian /* 3692227364Sadrian * Walk the list of frames, figure out which ones were correctly 3693227364Sadrian * sent and which weren't. 3694227364Sadrian */ 3695227364Sadrian bf = bf_first; 3696227364Sadrian nf = bf_first->bf_state.bfs_nframes; 3697227364Sadrian 3698227364Sadrian /* bf_first is going to be invalid once this list is walked */ 3699227364Sadrian bf_first = NULL; 3700227364Sadrian 3701227364Sadrian /* 3702227364Sadrian * Walk the list of completed frames and determine 3703227364Sadrian * which need to be completed and which need to be 3704227364Sadrian * retransmitted. 3705227364Sadrian * 3706227364Sadrian * For completed frames, the completion functions need 3707227364Sadrian * to be called at the end of this function as the last 3708227364Sadrian * node reference may free the node. 3709227364Sadrian * 3710227364Sadrian * Finally, since the TXQ lock can't be held during the 3711227364Sadrian * completion callback (to avoid lock recursion), 3712227364Sadrian * the completion calls have to be done outside of the 3713227364Sadrian * lock. 3714227364Sadrian */ 3715227364Sadrian while (bf) { 3716227364Sadrian nframes++; 3717229949Sadrian ba_index = ATH_BA_INDEX(seq_st, 3718229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3719227364Sadrian bf_next = bf->bf_next; 3720227364Sadrian bf->bf_next = NULL; /* Remove it from the aggr list */ 3721227364Sadrian 3722227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3723227364Sadrian "%s: checking bf=%p seqno=%d; ack=%d\n", 3724227364Sadrian __func__, bf, SEQNO(bf->bf_state.bfs_seqno), 3725227364Sadrian ATH_BA_ISSET(ba, ba_index)); 3726227364Sadrian 3727227364Sadrian if (tx_ok && ATH_BA_ISSET(ba, ba_index)) { 3728227868Sadrian sc->sc_stats.ast_tx_aggr_ok++; 3729227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3730227364Sadrian bf->bf_state.bfs_dobaw = 0; 3731227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3732227364Sadrian device_printf(sc->sc_dev, 3733227364Sadrian "%s: wasn't added: seqno %d\n", 3734227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3735227364Sadrian bf->bf_next = NULL; 3736227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3737227364Sadrian } else { 3738227868Sadrian sc->sc_stats.ast_tx_aggr_fail++; 3739227364Sadrian if (ath_tx_retry_subframe(sc, bf, &bf_q)) { 3740227364Sadrian drops++; 3741227364Sadrian bf->bf_next = NULL; 3742227364Sadrian TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list); 3743227364Sadrian } 3744227364Sadrian nbad++; 3745227364Sadrian } 3746227364Sadrian bf = bf_next; 3747227364Sadrian } 3748227364Sadrian 3749227364Sadrian /* 3750227364Sadrian * Now that the BAW updates have been done, unlock 3751227364Sadrian * 3752227364Sadrian * txseq is grabbed before the lock is released so we 3753227364Sadrian * have a consistent view of what -was- in the BAW. 3754227364Sadrian * Anything after this point will not yet have been 3755227364Sadrian * TXed. 3756227364Sadrian */ 3757227364Sadrian txseq = tap->txa_start; 3758227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3759227364Sadrian 3760227364Sadrian if (nframes != nf) 3761227364Sadrian device_printf(sc->sc_dev, 3762227364Sadrian "%s: num frames seen=%d; bf nframes=%d\n", 3763227364Sadrian __func__, nframes, nf); 3764227364Sadrian 3765227364Sadrian /* 3766227364Sadrian * Now we know how many frames were bad, call the rate 3767227364Sadrian * control code. 3768227364Sadrian */ 3769227364Sadrian if (fail == 0) 3770229949Sadrian ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes, 3771229949Sadrian nbad); 3772227364Sadrian 3773227364Sadrian /* 3774227364Sadrian * send bar if we dropped any frames 3775227364Sadrian */ 3776227364Sadrian if (drops) { 3777233908Sadrian /* Suspend the TX queue and get ready to send the BAR */ 3778233908Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3779233908Sadrian ath_tx_tid_bar_suspend(sc, atid); 3780233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3781227364Sadrian } 3782227364Sadrian 3783234725Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3784234725Sadrian "%s: txa_start now %d\n", __func__, tap->txa_start); 3785234725Sadrian 3786234725Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3787234725Sadrian 3788227364Sadrian /* Prepend all frames to the beginning of the queue */ 3789227364Sadrian while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) { 3790227364Sadrian TAILQ_REMOVE(&bf_q, bf, bf_list); 3791227364Sadrian ATH_TXQ_INSERT_HEAD(atid, bf, bf_list); 3792227364Sadrian } 3793234725Sadrian 3794234725Sadrian /* 3795234725Sadrian * Reschedule to grab some further frames. 3796234725Sadrian */ 3797227364Sadrian ath_tx_tid_sched(sc, atid); 3798227364Sadrian 3799233908Sadrian /* 3800233908Sadrian * Send BAR if required 3801233908Sadrian */ 3802233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3803233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3804234725Sadrian 3805233908Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3806233908Sadrian 3807227364Sadrian /* Do deferred completion */ 3808227364Sadrian while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) { 3809227364Sadrian TAILQ_REMOVE(&bf_cq, bf, bf_list); 3810227364Sadrian ath_tx_default_comp(sc, bf, 0); 3811227364Sadrian } 3812227364Sadrian} 3813227364Sadrian 3814227364Sadrian/* 3815227364Sadrian * Handle completion of unaggregated frames in an ADDBA 3816227364Sadrian * session. 3817227364Sadrian * 3818227364Sadrian * Fail is set to 1 if the entry is being freed via a call to 3819227364Sadrian * ath_tx_draintxq(). 3820227364Sadrian */ 3821227364Sadrianstatic void 3822227364Sadrianath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail) 3823227364Sadrian{ 3824227364Sadrian struct ieee80211_node *ni = bf->bf_node; 3825227364Sadrian struct ath_node *an = ATH_NODE(ni); 3826227364Sadrian int tid = bf->bf_state.bfs_tid; 3827227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 3828227364Sadrian struct ath_tx_status *ts = &bf->bf_status.ds_txstat; 3829227364Sadrian 3830227364Sadrian /* 3831227364Sadrian * Update rate control status here, before we possibly 3832227364Sadrian * punt to retry or cleanup. 3833227364Sadrian * 3834227364Sadrian * Do it outside of the TXQ lock. 3835227364Sadrian */ 3836233966Sadrian if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0)) 3837227364Sadrian ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc, 3838227364Sadrian &bf->bf_status.ds_txstat, 3839227364Sadrian bf->bf_state.bfs_pktlen, 3840227364Sadrian 1, (ts->ts_status == 0) ? 0 : 1); 3841227364Sadrian 3842227364Sadrian /* 3843227364Sadrian * This is called early so atid->hwq_depth can be tracked. 3844227364Sadrian * This unfortunately means that it's released and regrabbed 3845227364Sadrian * during retry and cleanup. That's rather inefficient. 3846227364Sadrian */ 3847227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 3848227364Sadrian 3849227364Sadrian if (tid == IEEE80211_NONQOS_TID) 3850227364Sadrian device_printf(sc->sc_dev, "%s: TID=16!\n", __func__); 3851227364Sadrian 3852229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, 3853229949Sadrian "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n", 3854229949Sadrian __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth, 3855229949Sadrian SEQNO(bf->bf_state.bfs_seqno)); 3856227364Sadrian 3857227364Sadrian atid->hwq_depth--; 3858227364Sadrian if (atid->hwq_depth < 0) 3859227364Sadrian device_printf(sc->sc_dev, "%s: hwq_depth < 0: %d\n", 3860227364Sadrian __func__, atid->hwq_depth); 3861227364Sadrian 3862227364Sadrian /* 3863227364Sadrian * If a cleanup is in progress, punt to comp_cleanup; 3864227364Sadrian * rather than handling it here. It's thus their 3865227364Sadrian * responsibility to clean up, call the completion 3866227364Sadrian * function in net80211, etc. 3867227364Sadrian */ 3868227364Sadrian if (atid->cleanup_inprogress) { 3869227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3870229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n", 3871229949Sadrian __func__); 3872227364Sadrian ath_tx_comp_cleanup_unaggr(sc, bf); 3873227364Sadrian return; 3874227364Sadrian } 3875227364Sadrian 3876227364Sadrian /* 3877227364Sadrian * Don't bother with the retry check if all frames 3878227364Sadrian * are being failed (eg during queue deletion.) 3879227364Sadrian */ 3880235461Sadrian#if 0 3881227364Sadrian if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) { 3882235461Sadrian#endif 3883235461Sadrian if (fail == 0 && ts->ts_status != 0) { 3884227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3885229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n", 3886229949Sadrian __func__); 3887227364Sadrian ath_tx_aggr_retry_unaggr(sc, bf); 3888227364Sadrian return; 3889227364Sadrian } 3890227364Sadrian 3891227364Sadrian /* Success? Complete */ 3892227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n", 3893227364Sadrian __func__, tid, SEQNO(bf->bf_state.bfs_seqno)); 3894227364Sadrian if (bf->bf_state.bfs_dobaw) { 3895227364Sadrian ath_tx_update_baw(sc, an, atid, bf); 3896227364Sadrian bf->bf_state.bfs_dobaw = 0; 3897227364Sadrian if (! bf->bf_state.bfs_addedbaw) 3898227364Sadrian device_printf(sc->sc_dev, 3899227364Sadrian "%s: wasn't added: seqno %d\n", 3900227364Sadrian __func__, SEQNO(bf->bf_state.bfs_seqno)); 3901227364Sadrian } 3902227364Sadrian 3903233908Sadrian /* 3904233908Sadrian * Send BAR if required 3905233908Sadrian */ 3906233908Sadrian if (ath_tx_tid_bar_tx_ready(sc, atid)) 3907233908Sadrian ath_tx_tid_bar_tx(sc, atid); 3908233908Sadrian 3909227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 3910227364Sadrian 3911227364Sadrian ath_tx_default_comp(sc, bf, fail); 3912227364Sadrian /* bf is freed at this point */ 3913227364Sadrian} 3914227364Sadrian 3915227364Sadrianvoid 3916227364Sadrianath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail) 3917227364Sadrian{ 3918227364Sadrian if (bf->bf_state.bfs_aggr) 3919227364Sadrian ath_tx_aggr_comp_aggr(sc, bf, fail); 3920227364Sadrian else 3921227364Sadrian ath_tx_aggr_comp_unaggr(sc, bf, fail); 3922227364Sadrian} 3923227364Sadrian 3924227364Sadrian/* 3925227364Sadrian * Schedule some packets from the given node/TID to the hardware. 3926227364Sadrian * 3927227364Sadrian * This is the aggregate version. 3928227364Sadrian */ 3929227364Sadrianvoid 3930227364Sadrianath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an, 3931227364Sadrian struct ath_tid *tid) 3932227364Sadrian{ 3933227364Sadrian struct ath_buf *bf; 3934227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 3935227364Sadrian struct ieee80211_tx_ampdu *tap; 3936227364Sadrian ATH_AGGR_STATUS status; 3937227364Sadrian ath_bufhead bf_q; 3938227364Sadrian 3939227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid); 3940227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 3941227364Sadrian 3942227364Sadrian tap = ath_tx_get_tx_tid(an, tid->tid); 3943227364Sadrian 3944227364Sadrian if (tid->tid == IEEE80211_NONQOS_TID) 3945227364Sadrian device_printf(sc->sc_dev, "%s: called for TID=NONQOS_TID?\n", 3946227364Sadrian __func__); 3947227364Sadrian 3948227364Sadrian for (;;) { 3949227364Sadrian status = ATH_AGGR_DONE; 3950227364Sadrian 3951227364Sadrian /* 3952227364Sadrian * If the upper layer has paused the TID, don't 3953227364Sadrian * queue any further packets. 3954227364Sadrian * 3955227364Sadrian * This can also occur from the completion task because 3956227364Sadrian * of packet loss; but as its serialised with this code, 3957227364Sadrian * it won't "appear" half way through queuing packets. 3958227364Sadrian */ 3959227364Sadrian if (tid->paused) 3960227364Sadrian break; 3961227364Sadrian 3962227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 3963227364Sadrian if (bf == NULL) { 3964227364Sadrian break; 3965227364Sadrian } 3966227364Sadrian 3967227364Sadrian /* 3968227364Sadrian * If the packet doesn't fall within the BAW (eg a NULL 3969227364Sadrian * data frame), schedule it directly; continue. 3970227364Sadrian */ 3971227364Sadrian if (! bf->bf_state.bfs_dobaw) { 3972229949Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 3973229949Sadrian "%s: non-baw packet\n", 3974227364Sadrian __func__); 3975227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 3976227364Sadrian bf->bf_state.bfs_aggr = 0; 3977227364Sadrian ath_tx_do_ratelookup(sc, bf); 3978233989Sadrian ath_tx_calc_duration(sc, bf); 3979233989Sadrian ath_tx_calc_protection(sc, bf); 3980233989Sadrian ath_tx_set_rtscts(sc, bf); 3981227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 3982227364Sadrian ath_tx_setds(sc, bf); 3983227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 3984227364Sadrian 3985227364Sadrian sc->sc_aggr_stats.aggr_nonbaw_pkt++; 3986227364Sadrian 3987227364Sadrian /* Queue the packet; continue */ 3988227364Sadrian goto queuepkt; 3989227364Sadrian } 3990227364Sadrian 3991227364Sadrian TAILQ_INIT(&bf_q); 3992227364Sadrian 3993227364Sadrian /* 3994227364Sadrian * Do a rate control lookup on the first frame in the 3995227364Sadrian * list. The rate control code needs that to occur 3996227364Sadrian * before it can determine whether to TX. 3997227364Sadrian * It's inaccurate because the rate control code doesn't 3998227364Sadrian * really "do" aggregate lookups, so it only considers 3999227364Sadrian * the size of the first frame. 4000227364Sadrian */ 4001227364Sadrian ath_tx_do_ratelookup(sc, bf); 4002227364Sadrian bf->bf_state.bfs_rc[3].rix = 0; 4003227364Sadrian bf->bf_state.bfs_rc[3].tries = 0; 4004233989Sadrian 4005233989Sadrian ath_tx_calc_duration(sc, bf); 4006233989Sadrian ath_tx_calc_protection(sc, bf); 4007233989Sadrian 4008233989Sadrian ath_tx_set_rtscts(sc, bf); 4009227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4010227364Sadrian 4011227364Sadrian status = ath_tx_form_aggr(sc, an, tid, &bf_q); 4012227364Sadrian 4013227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4014227364Sadrian "%s: ath_tx_form_aggr() status=%d\n", __func__, status); 4015227364Sadrian 4016227364Sadrian /* 4017227364Sadrian * No frames to be picked up - out of BAW 4018227364Sadrian */ 4019227364Sadrian if (TAILQ_EMPTY(&bf_q)) 4020227364Sadrian break; 4021227364Sadrian 4022227364Sadrian /* 4023227364Sadrian * This assumes that the descriptor list in the ath_bufhead 4024227364Sadrian * are already linked together via bf_next pointers. 4025227364Sadrian */ 4026227364Sadrian bf = TAILQ_FIRST(&bf_q); 4027227364Sadrian 4028233989Sadrian if (status == ATH_AGGR_8K_LIMITED) 4029233989Sadrian sc->sc_aggr_stats.aggr_rts_aggr_limited++; 4030233989Sadrian 4031227364Sadrian /* 4032227364Sadrian * If it's the only frame send as non-aggregate 4033227364Sadrian * assume that ath_tx_form_aggr() has checked 4034227364Sadrian * whether it's in the BAW and added it appropriately. 4035227364Sadrian */ 4036227364Sadrian if (bf->bf_state.bfs_nframes == 1) { 4037227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4038227364Sadrian "%s: single-frame aggregate\n", __func__); 4039227364Sadrian bf->bf_state.bfs_aggr = 0; 4040227364Sadrian ath_tx_setds(sc, bf); 4041227364Sadrian ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc); 4042227364Sadrian if (status == ATH_AGGR_BAW_CLOSED) 4043227364Sadrian sc->sc_aggr_stats.aggr_baw_closed_single_pkt++; 4044227364Sadrian else 4045227364Sadrian sc->sc_aggr_stats.aggr_single_pkt++; 4046227364Sadrian } else { 4047227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, 4048229949Sadrian "%s: multi-frame aggregate: %d frames, " 4049229949Sadrian "length %d\n", 4050227364Sadrian __func__, bf->bf_state.bfs_nframes, 4051227364Sadrian bf->bf_state.bfs_al); 4052227364Sadrian bf->bf_state.bfs_aggr = 1; 4053227364Sadrian sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++; 4054227364Sadrian sc->sc_aggr_stats.aggr_aggr_pkt++; 4055227364Sadrian 4056227364Sadrian /* 4057233989Sadrian * Calculate the duration/protection as required. 4058233989Sadrian */ 4059233989Sadrian ath_tx_calc_duration(sc, bf); 4060233989Sadrian ath_tx_calc_protection(sc, bf); 4061233989Sadrian 4062233989Sadrian /* 4063227364Sadrian * Update the rate and rtscts information based on the 4064227364Sadrian * rate decision made by the rate control code; 4065227364Sadrian * the first frame in the aggregate needs it. 4066227364Sadrian */ 4067227364Sadrian ath_tx_set_rtscts(sc, bf); 4068227364Sadrian 4069227364Sadrian /* 4070227364Sadrian * Setup the relevant descriptor fields 4071227364Sadrian * for aggregation. The first descriptor 4072227364Sadrian * already points to the rest in the chain. 4073227364Sadrian */ 4074227364Sadrian ath_tx_setds_11n(sc, bf); 4075227364Sadrian 4076227364Sadrian } 4077227364Sadrian queuepkt: 4078227364Sadrian //txq = bf->bf_state.bfs_txq; 4079227364Sadrian 4080227364Sadrian /* Set completion handler, multi-frame aggregate or not */ 4081227364Sadrian bf->bf_comp = ath_tx_aggr_comp; 4082227364Sadrian 4083227364Sadrian if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID) 4084227364Sadrian device_printf(sc->sc_dev, "%s: TID=16?\n", __func__); 4085227364Sadrian 4086227364Sadrian /* Punt to txq */ 4087227364Sadrian ath_tx_handoff(sc, txq, bf); 4088227364Sadrian 4089227364Sadrian /* Track outstanding buffer count to hardware */ 4090227364Sadrian /* aggregates are "one" buffer */ 4091227364Sadrian tid->hwq_depth++; 4092227364Sadrian 4093227364Sadrian /* 4094227364Sadrian * Break out if ath_tx_form_aggr() indicated 4095227364Sadrian * there can't be any further progress (eg BAW is full.) 4096227364Sadrian * Checking for an empty txq is done above. 4097227364Sadrian * 4098227364Sadrian * XXX locking on txq here? 4099227364Sadrian */ 4100227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit || 4101227364Sadrian status == ATH_AGGR_BAW_CLOSED) 4102227364Sadrian break; 4103227364Sadrian } 4104227364Sadrian} 4105227364Sadrian 4106227364Sadrian/* 4107227364Sadrian * Schedule some packets from the given node/TID to the hardware. 4108227364Sadrian */ 4109227364Sadrianvoid 4110227364Sadrianath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an, 4111227364Sadrian struct ath_tid *tid) 4112227364Sadrian{ 4113227364Sadrian struct ath_buf *bf; 4114227364Sadrian struct ath_txq *txq = sc->sc_ac2q[tid->ac]; 4115227364Sadrian 4116227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n", 4117227364Sadrian __func__, an, tid->tid); 4118227364Sadrian 4119227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4120227364Sadrian 4121227364Sadrian /* Check - is AMPDU pending or running? then print out something */ 4122227364Sadrian if (ath_tx_ampdu_pending(sc, an, tid->tid)) 4123227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu pending?\n", 4124227364Sadrian __func__, tid->tid); 4125227364Sadrian if (ath_tx_ampdu_running(sc, an, tid->tid)) 4126227364Sadrian device_printf(sc->sc_dev, "%s: tid=%d, ampdu running?\n", 4127227364Sadrian __func__, tid->tid); 4128227364Sadrian 4129227364Sadrian for (;;) { 4130227364Sadrian 4131227364Sadrian /* 4132227364Sadrian * If the upper layers have paused the TID, don't 4133227364Sadrian * queue any further packets. 4134227364Sadrian */ 4135227364Sadrian if (tid->paused) 4136227364Sadrian break; 4137227364Sadrian 4138227364Sadrian bf = TAILQ_FIRST(&tid->axq_q); 4139227364Sadrian if (bf == NULL) { 4140227364Sadrian break; 4141227364Sadrian } 4142227364Sadrian 4143227364Sadrian ATH_TXQ_REMOVE(tid, bf, bf_list); 4144227364Sadrian 4145227364Sadrian KASSERT(txq == bf->bf_state.bfs_txq, ("txqs not equal!\n")); 4146227364Sadrian 4147227364Sadrian /* Sanity check! */ 4148227364Sadrian if (tid->tid != bf->bf_state.bfs_tid) { 4149227364Sadrian device_printf(sc->sc_dev, "%s: bfs_tid %d !=" 4150227364Sadrian " tid %d\n", 4151227364Sadrian __func__, bf->bf_state.bfs_tid, tid->tid); 4152227364Sadrian } 4153227364Sadrian /* Normal completion handler */ 4154227364Sadrian bf->bf_comp = ath_tx_normal_comp; 4155227364Sadrian 4156227364Sadrian /* Program descriptors + rate control */ 4157227364Sadrian ath_tx_do_ratelookup(sc, bf); 4158233989Sadrian ath_tx_calc_duration(sc, bf); 4159233989Sadrian ath_tx_calc_protection(sc, bf); 4160233989Sadrian ath_tx_set_rtscts(sc, bf); 4161227364Sadrian ath_tx_rate_fill_rcflags(sc, bf); 4162227364Sadrian ath_tx_setds(sc, bf); 4163227364Sadrian 4164227364Sadrian /* Track outstanding buffer count to hardware */ 4165227364Sadrian /* aggregates are "one" buffer */ 4166227364Sadrian tid->hwq_depth++; 4167227364Sadrian 4168227364Sadrian /* Punt to hardware or software txq */ 4169227364Sadrian ath_tx_handoff(sc, txq, bf); 4170227364Sadrian } 4171227364Sadrian} 4172227364Sadrian 4173227364Sadrian/* 4174227364Sadrian * Schedule some packets to the given hardware queue. 4175227364Sadrian * 4176227364Sadrian * This function walks the list of TIDs (ie, ath_node TIDs 4177227364Sadrian * with queued traffic) and attempts to schedule traffic 4178227364Sadrian * from them. 4179227364Sadrian * 4180227364Sadrian * TID scheduling is implemented as a FIFO, with TIDs being 4181227364Sadrian * added to the end of the queue after some frames have been 4182227364Sadrian * scheduled. 4183227364Sadrian */ 4184227364Sadrianvoid 4185227364Sadrianath_txq_sched(struct ath_softc *sc, struct ath_txq *txq) 4186227364Sadrian{ 4187227364Sadrian struct ath_tid *tid, *next, *last; 4188227364Sadrian 4189227364Sadrian ATH_TXQ_LOCK_ASSERT(txq); 4190227364Sadrian 4191227364Sadrian /* 4192227364Sadrian * Don't schedule if the hardware queue is busy. 4193227364Sadrian * This (hopefully) gives some more time to aggregate 4194227364Sadrian * some packets in the aggregation queue. 4195227364Sadrian */ 4196227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4197227364Sadrian sc->sc_aggr_stats.aggr_sched_nopkt++; 4198227364Sadrian return; 4199227364Sadrian } 4200227364Sadrian 4201227364Sadrian last = TAILQ_LAST(&txq->axq_tidq, axq_t_s); 4202227364Sadrian 4203227364Sadrian TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) { 4204227364Sadrian /* 4205227364Sadrian * Suspend paused queues here; they'll be resumed 4206227364Sadrian * once the addba completes or times out. 4207227364Sadrian */ 4208227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n", 4209227364Sadrian __func__, tid->tid, tid->paused); 4210227364Sadrian ath_tx_tid_unsched(sc, tid); 4211227364Sadrian if (tid->paused) { 4212227364Sadrian continue; 4213227364Sadrian } 4214227364Sadrian if (ath_tx_ampdu_running(sc, tid->an, tid->tid)) 4215227364Sadrian ath_tx_tid_hw_queue_aggr(sc, tid->an, tid); 4216227364Sadrian else 4217227364Sadrian ath_tx_tid_hw_queue_norm(sc, tid->an, tid); 4218227364Sadrian 4219227364Sadrian /* Not empty? Re-schedule */ 4220227364Sadrian if (tid->axq_depth != 0) 4221227364Sadrian ath_tx_tid_sched(sc, tid); 4222227364Sadrian 4223227364Sadrian /* Give the software queue time to aggregate more packets */ 4224227364Sadrian if (txq->axq_aggr_depth >= sc->sc_hwq_limit) { 4225227364Sadrian break; 4226227364Sadrian } 4227227364Sadrian 4228227364Sadrian /* 4229227364Sadrian * If this was the last entry on the original list, stop. 4230227364Sadrian * Otherwise nodes that have been rescheduled onto the end 4231227364Sadrian * of the TID FIFO list will just keep being rescheduled. 4232227364Sadrian */ 4233227364Sadrian if (tid == last) 4234227364Sadrian break; 4235227364Sadrian } 4236227364Sadrian} 4237227364Sadrian 4238227364Sadrian/* 4239227364Sadrian * TX addba handling 4240227364Sadrian */ 4241227364Sadrian 4242227364Sadrian/* 4243227364Sadrian * Return net80211 TID struct pointer, or NULL for none 4244227364Sadrian */ 4245227364Sadrianstruct ieee80211_tx_ampdu * 4246227364Sadrianath_tx_get_tx_tid(struct ath_node *an, int tid) 4247227364Sadrian{ 4248227364Sadrian struct ieee80211_node *ni = &an->an_node; 4249227364Sadrian struct ieee80211_tx_ampdu *tap; 4250227364Sadrian 4251227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4252227364Sadrian return NULL; 4253227364Sadrian 4254234324Sadrian tap = &ni->ni_tx_ampdu[tid]; 4255227364Sadrian return tap; 4256227364Sadrian} 4257227364Sadrian 4258227364Sadrian/* 4259227364Sadrian * Is AMPDU-TX running? 4260227364Sadrian */ 4261227364Sadrianstatic int 4262227364Sadrianath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid) 4263227364Sadrian{ 4264227364Sadrian struct ieee80211_tx_ampdu *tap; 4265227364Sadrian 4266227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4267227364Sadrian return 0; 4268227364Sadrian 4269227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4270227364Sadrian if (tap == NULL) 4271227364Sadrian return 0; /* Not valid; default to not running */ 4272227364Sadrian 4273227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING); 4274227364Sadrian} 4275227364Sadrian 4276227364Sadrian/* 4277227364Sadrian * Is AMPDU-TX negotiation pending? 4278227364Sadrian */ 4279227364Sadrianstatic int 4280227364Sadrianath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid) 4281227364Sadrian{ 4282227364Sadrian struct ieee80211_tx_ampdu *tap; 4283227364Sadrian 4284227364Sadrian if (tid == IEEE80211_NONQOS_TID) 4285227364Sadrian return 0; 4286227364Sadrian 4287227364Sadrian tap = ath_tx_get_tx_tid(an, tid); 4288227364Sadrian if (tap == NULL) 4289227364Sadrian return 0; /* Not valid; default to not pending */ 4290227364Sadrian 4291227364Sadrian return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND); 4292227364Sadrian} 4293227364Sadrian 4294227364Sadrian/* 4295227364Sadrian * Is AMPDU-TX pending for the given TID? 4296227364Sadrian */ 4297227364Sadrian 4298227364Sadrian 4299227364Sadrian/* 4300227364Sadrian * Method to handle sending an ADDBA request. 4301227364Sadrian * 4302227364Sadrian * We tap this so the relevant flags can be set to pause the TID 4303227364Sadrian * whilst waiting for the response. 4304227364Sadrian * 4305227364Sadrian * XXX there's no timeout handler we can override? 4306227364Sadrian */ 4307227364Sadrianint 4308227364Sadrianath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4309227364Sadrian int dialogtoken, int baparamset, int batimeout) 4310227364Sadrian{ 4311227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4312234324Sadrian int tid = tap->txa_tid; 4313227364Sadrian struct ath_node *an = ATH_NODE(ni); 4314227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4315227364Sadrian 4316227364Sadrian /* 4317227364Sadrian * XXX danger Will Robinson! 4318227364Sadrian * 4319227364Sadrian * Although the taskqueue may be running and scheduling some more 4320227364Sadrian * packets, these should all be _before_ the addba sequence number. 4321227364Sadrian * However, net80211 will keep self-assigning sequence numbers 4322227364Sadrian * until addba has been negotiated. 4323227364Sadrian * 4324227364Sadrian * In the past, these packets would be "paused" (which still works 4325227364Sadrian * fine, as they're being scheduled to the driver in the same 4326227364Sadrian * serialised method which is calling the addba request routine) 4327227364Sadrian * and when the aggregation session begins, they'll be dequeued 4328227364Sadrian * as aggregate packets and added to the BAW. However, now there's 4329227364Sadrian * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these 4330227364Sadrian * packets. Thus they never get included in the BAW tracking and 4331227364Sadrian * this can cause the initial burst of packets after the addba 4332227364Sadrian * negotiation to "hang", as they quickly fall outside the BAW. 4333227364Sadrian * 4334227364Sadrian * The "eventual" solution should be to tag these packets with 4335227364Sadrian * dobaw. Although net80211 has given us a sequence number, 4336227364Sadrian * it'll be "after" the left edge of the BAW and thus it'll 4337227364Sadrian * fall within it. 4338227364Sadrian */ 4339235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4340235774Sadrian /* 4341235774Sadrian * This is a bit annoying. Until net80211 HT code inherits some 4342235774Sadrian * (any) locking, we may have this called in parallel BUT only 4343235774Sadrian * one response/timeout will be called. Grr. 4344235774Sadrian */ 4345235774Sadrian if (atid->addba_tx_pending == 0) { 4346235774Sadrian ath_tx_tid_pause(sc, atid); 4347235774Sadrian atid->addba_tx_pending = 1; 4348235774Sadrian } 4349235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4350227364Sadrian 4351227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4352227364Sadrian "%s: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n", 4353227364Sadrian __func__, dialogtoken, baparamset, batimeout); 4354227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4355227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4356227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4357227364Sadrian 4358227364Sadrian return sc->sc_addba_request(ni, tap, dialogtoken, baparamset, 4359227364Sadrian batimeout); 4360227364Sadrian} 4361227364Sadrian 4362227364Sadrian/* 4363227364Sadrian * Handle an ADDBA response. 4364227364Sadrian * 4365227364Sadrian * We unpause the queue so TX'ing can resume. 4366227364Sadrian * 4367227364Sadrian * Any packets TX'ed from this point should be "aggregate" (whether 4368227364Sadrian * aggregate or not) so the BAW is updated. 4369227364Sadrian * 4370227364Sadrian * Note! net80211 keeps self-assigning sequence numbers until 4371227364Sadrian * ampdu is negotiated. This means the initially-negotiated BAW left 4372227364Sadrian * edge won't match the ni->ni_txseq. 4373227364Sadrian * 4374227364Sadrian * So, being very dirty, the BAW left edge is "slid" here to match 4375227364Sadrian * ni->ni_txseq. 4376227364Sadrian * 4377227364Sadrian * What likely SHOULD happen is that all packets subsequent to the 4378227364Sadrian * addba request should be tagged as aggregate and queued as non-aggregate 4379227364Sadrian * frames; thus updating the BAW. For now though, I'll just slide the 4380227364Sadrian * window. 4381227364Sadrian */ 4382227364Sadrianint 4383227364Sadrianath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4384227364Sadrian int status, int code, int batimeout) 4385227364Sadrian{ 4386227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4387234324Sadrian int tid = tap->txa_tid; 4388227364Sadrian struct ath_node *an = ATH_NODE(ni); 4389227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4390227364Sadrian int r; 4391227364Sadrian 4392227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4393227364Sadrian "%s: called; status=%d, code=%d, batimeout=%d\n", __func__, 4394227364Sadrian status, code, batimeout); 4395227364Sadrian 4396227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4397227364Sadrian "%s: txa_start=%d, ni_txseqs=%d\n", 4398227364Sadrian __func__, tap->txa_start, ni->ni_txseqs[tid]); 4399227364Sadrian 4400227364Sadrian /* 4401227364Sadrian * Call this first, so the interface flags get updated 4402227364Sadrian * before the TID is unpaused. Otherwise a race condition 4403227364Sadrian * exists where the unpaused TID still doesn't yet have 4404227364Sadrian * IEEE80211_AGGR_RUNNING set. 4405227364Sadrian */ 4406227364Sadrian r = sc->sc_addba_response(ni, tap, status, code, batimeout); 4407227364Sadrian 4408227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4409235774Sadrian atid->addba_tx_pending = 0; 4410227364Sadrian /* 4411227364Sadrian * XXX dirty! 4412227364Sadrian * Slide the BAW left edge to wherever net80211 left it for us. 4413227364Sadrian * Read above for more information. 4414227364Sadrian */ 4415227364Sadrian tap->txa_start = ni->ni_txseqs[tid]; 4416227364Sadrian ath_tx_tid_resume(sc, atid); 4417227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4418227364Sadrian return r; 4419227364Sadrian} 4420227364Sadrian 4421227364Sadrian 4422227364Sadrian/* 4423227364Sadrian * Stop ADDBA on a queue. 4424237593Sadrian * 4425237593Sadrian * This can be called whilst BAR TX is currently active on the queue, 4426237593Sadrian * so make sure this is unblocked before continuing. 4427227364Sadrian */ 4428227364Sadrianvoid 4429227364Sadrianath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 4430227364Sadrian{ 4431227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4432234324Sadrian int tid = tap->txa_tid; 4433227364Sadrian struct ath_node *an = ATH_NODE(ni); 4434227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4435227364Sadrian 4436227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: called\n", __func__); 4437227364Sadrian 4438237593Sadrian /* 4439237593Sadrian * Pause TID traffic early, so there aren't any races 4440237593Sadrian * Unblock the pending BAR held traffic, if it's currently paused. 4441237593Sadrian */ 4442235034Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4443227364Sadrian ath_tx_tid_pause(sc, atid); 4444237593Sadrian if (atid->bar_wait) { 4445237593Sadrian /* 4446237593Sadrian * bar_unsuspend() expects bar_tx == 1, as it should be 4447237593Sadrian * called from the TX completion path. This quietens 4448237593Sadrian * the warning. It's cleared for us anyway. 4449237593Sadrian */ 4450237593Sadrian atid->bar_tx = 1; 4451237593Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4452237593Sadrian } 4453235034Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4454227364Sadrian 4455227364Sadrian /* There's no need to hold the TXQ lock here */ 4456227364Sadrian sc->sc_addba_stop(ni, tap); 4457227364Sadrian 4458227364Sadrian /* 4459235749Sadrian * ath_tx_tid_cleanup will resume the TID if possible, otherwise 4460227364Sadrian * it'll set the cleanup flag, and it'll be unpaused once 4461227364Sadrian * things have been cleaned up. 4462227364Sadrian */ 4463235749Sadrian ath_tx_tid_cleanup(sc, an, tid); 4464227364Sadrian} 4465227364Sadrian 4466227364Sadrian/* 4467227364Sadrian * Note: net80211 bar_timeout() doesn't call this function on BAR failure; 4468227364Sadrian * it simply tears down the aggregation session. Ew. 4469227364Sadrian * 4470227364Sadrian * It however will call ieee80211_ampdu_stop() which will call 4471227364Sadrian * ic->ic_addba_stop(). 4472227364Sadrian * 4473227364Sadrian * XXX This uses a hard-coded max BAR count value; the whole 4474227364Sadrian * XXX BAR TX success or failure should be better handled! 4475227364Sadrian */ 4476227364Sadrianvoid 4477227364Sadrianath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 4478227364Sadrian int status) 4479227364Sadrian{ 4480227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4481234324Sadrian int tid = tap->txa_tid; 4482227364Sadrian struct ath_node *an = ATH_NODE(ni); 4483227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4484227364Sadrian int attempts = tap->txa_attempts; 4485227364Sadrian 4486235491Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_BAR, 4487235676Sadrian "%s: called; tap=%p, atid=%p, txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n", 4488235491Sadrian __func__, 4489235676Sadrian tap, 4490235676Sadrian atid, 4491235676Sadrian tap->txa_tid, 4492235676Sadrian atid->tid, 4493235491Sadrian status, 4494235491Sadrian attempts); 4495227364Sadrian 4496227364Sadrian /* Note: This may update the BAW details */ 4497227364Sadrian sc->sc_bar_response(ni, tap, status); 4498227364Sadrian 4499227364Sadrian /* Unpause the TID */ 4500227364Sadrian /* 4501227364Sadrian * XXX if this is attempt=50, the TID will be downgraded 4502227364Sadrian * XXX to a non-aggregate session. So we must unpause the 4503227364Sadrian * XXX TID here or it'll never be done. 4504227364Sadrian */ 4505227364Sadrian if (status == 0 || attempts == 50) { 4506227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4507233908Sadrian ath_tx_tid_bar_unsuspend(sc, atid); 4508227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4509227364Sadrian } 4510227364Sadrian} 4511227364Sadrian 4512227364Sadrian/* 4513227364Sadrian * This is called whenever the pending ADDBA request times out. 4514227364Sadrian * Unpause and reschedule the TID. 4515227364Sadrian */ 4516227364Sadrianvoid 4517227364Sadrianath_addba_response_timeout(struct ieee80211_node *ni, 4518227364Sadrian struct ieee80211_tx_ampdu *tap) 4519227364Sadrian{ 4520227364Sadrian struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc; 4521234324Sadrian int tid = tap->txa_tid; 4522227364Sadrian struct ath_node *an = ATH_NODE(ni); 4523227364Sadrian struct ath_tid *atid = &an->an_tid[tid]; 4524227364Sadrian 4525227364Sadrian DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, 4526227364Sadrian "%s: called; resuming\n", __func__); 4527227364Sadrian 4528235774Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4529235774Sadrian atid->addba_tx_pending = 0; 4530235774Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4531235774Sadrian 4532227364Sadrian /* Note: This updates the aggregate state to (again) pending */ 4533227364Sadrian sc->sc_addba_response_timeout(ni, tap); 4534227364Sadrian 4535227364Sadrian /* Unpause the TID; which reschedules it */ 4536227364Sadrian ATH_TXQ_LOCK(sc->sc_ac2q[atid->ac]); 4537227364Sadrian ath_tx_tid_resume(sc, atid); 4538227364Sadrian ATH_TXQ_UNLOCK(sc->sc_ac2q[atid->ac]); 4539227364Sadrian} 4540238710Sadrian 4541238710Sadrianstatic int 4542238710Sadrianath_legacy_dma_txsetup(struct ath_softc *sc) 4543238710Sadrian{ 4544238710Sadrian 4545238710Sadrian /* nothing new needed */ 4546238710Sadrian return (0); 4547238710Sadrian} 4548238710Sadrian 4549238710Sadrianstatic int 4550238710Sadrianath_legacy_dma_txteardown(struct ath_softc *sc) 4551238710Sadrian{ 4552238710Sadrian 4553238710Sadrian /* nothing new needed */ 4554238710Sadrian return (0); 4555238710Sadrian} 4556238710Sadrian 4557238710Sadrianvoid 4558238710Sadrianath_xmit_setup_legacy(struct ath_softc *sc) 4559238710Sadrian{ 4560238729Sadrian /* 4561238729Sadrian * For now, just set the descriptor length to sizeof(ath_desc); 4562238729Sadrian * worry about extracting the real length out of the HAL later. 4563238729Sadrian */ 4564238729Sadrian sc->sc_tx_desclen = sizeof(struct ath_desc); 4565238729Sadrian sc->sc_tx_statuslen = 0; 4566238729Sadrian sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */ 4567238710Sadrian 4568238710Sadrian sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup; 4569238710Sadrian sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown; 4570238931Sadrian sc->sc_tx.xmit_attach_comp_func = ath_legacy_attach_comp_func; 4571238930Sadrian 4572238930Sadrian sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart; 4573238930Sadrian sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff; 4574238931Sadrian sc->sc_tx.xmit_processq = ath_legacy_tx_processq; 4575238931Sadrian sc->sc_tx.xmit_drainq = ath_legacy_tx_draintxq; 4576238710Sadrian} 4577