2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
3 * Copyright (c) 2010-2012 Adrian Chadd, Xenion Pty Ltd
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer,
11 * without modification.
12 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
13 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
14 * redistribution must be conditioned upon including a substantially
15 * similar Disclaimer requirement for further binary redistribution.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
21 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
26 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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31 #include <sys/cdefs.h>
34 * Driver for the Atheros Wireless LAN controller.
36 * This software is derived from work of Atsushi Onoe; his contribution
37 * is greatly appreciated.
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/sysctl.h>
48 #include <sys/malloc.h>
50 #include <sys/mutex.h>
51 #include <sys/kernel.h>
52 #include <sys/socket.h>
53 #include <sys/sockio.h>
54 #include <sys/errno.h>
55 #include <sys/callout.h>
57 #include <sys/endian.h>
58 #include <sys/kthread.h>
59 #include <sys/taskqueue.h>
64 #include <net/if_var.h>
65 #include <net/if_dl.h>
66 #include <net/if_media.h>
67 #include <net/if_types.h>
68 #include <net/if_arp.h>
69 #include <net/ethernet.h>
70 #include <net/if_llc.h>
72 #include <netproto/802_11/ieee80211_var.h>
73 #include <netproto/802_11/ieee80211_regdomain.h>
74 #ifdef IEEE80211_SUPPORT_SUPERG
75 #include <netproto/802_11/ieee80211_superg.h>
77 #ifdef IEEE80211_SUPPORT_TDMA
78 #include <netproto/802_11/ieee80211_tdma.h>
80 #include <netproto/802_11/ieee80211_ht.h>
85 #include <netinet/in.h>
86 #include <netinet/if_ether.h>
89 #include <dev/netif/ath/ath/if_athvar.h>
90 #include <dev/netif/ath/ath_hal/ah_devid.h> /* XXX for softled */
91 #include <dev/netif/ath/ath_hal/ah_diagcodes.h>
93 #include <dev/netif/ath/ath/if_ath_debug.h>
96 #include <dev/netif/ath/ath_tx99/ath_tx99.h>
99 #include <dev/netif/ath/ath/if_ath_misc.h>
100 #include <dev/netif/ath/ath/if_ath_tx.h>
101 #include <dev/netif/ath/ath/if_ath_tx_ht.h>
104 #include <dev/netif/ath/ath/if_ath_alq.h>
108 * How many retries to perform in software
110 #define SWMAX_RETRIES 10
113 * What queue to throw the non-QoS TID traffic into
115 #define ATH_NONQOS_TID_AC WME_AC_VO
118 static int ath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an);
120 static int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an,
122 static int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an,
124 static ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc,
125 struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0);
126 static int ath_tx_action_frame_override_queue(struct ath_softc *sc,
127 struct ieee80211_node *ni, struct mbuf *m0, int *tid);
128 static struct ath_buf *
129 ath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an,
130 struct ath_tid *tid, struct ath_buf *bf);
134 ath_tx_alq_post(struct ath_softc *sc, struct ath_buf *bf_first)
140 /* XXX we should skip out early if debugging isn't enabled! */
144 /* XXX should ensure bf_nseg > 0! */
145 if (bf->bf_nseg == 0)
147 n = ((bf->bf_nseg - 1) / sc->sc_tx_nmaps) + 1;
148 for (i = 0, ds = (const char *) bf->bf_desc;
150 i++, ds += sc->sc_tx_desclen) {
151 if_ath_alq_post(&sc->sc_alq,
159 #endif /* ATH_DEBUG_ALQ */
162 * Whether to use the 11n rate scenario functions or not
165 ath_tx_is_11n(struct ath_softc *sc)
167 return ((sc->sc_ah->ah_magic == 0x20065416) ||
168 (sc->sc_ah->ah_magic == 0x19741014));
172 * Obtain the current TID from the given frame.
174 * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.)
175 * This has implications for which AC/priority the packet is placed
179 ath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0)
181 const struct ieee80211_frame *wh;
182 int pri = M_WME_GETAC(m0);
184 wh = mtod(m0, const struct ieee80211_frame *);
185 if (! IEEE80211_QOS_HAS_SEQ(wh))
186 return IEEE80211_NONQOS_TID;
188 return WME_AC_TO_TID(pri);
192 ath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf)
194 struct ieee80211_frame *wh;
196 wh = mtod(bf->bf_m, struct ieee80211_frame *);
197 /* Only update/resync if needed */
198 if (bf->bf_state.bfs_isretried == 0) {
199 wh->i_fc[1] |= IEEE80211_FC1_RETRY;
200 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap,
201 BUS_DMASYNC_PREWRITE);
203 bf->bf_state.bfs_isretried = 1;
204 bf->bf_state.bfs_retries ++;
208 * Determine what the correct AC queue for the given frame
211 * This code assumes that the TIDs map consistently to
212 * the underlying hardware (or software) ath_txq.
213 * Since the sender may try to set an AC which is
214 * arbitrary, non-QoS TIDs may end up being put on
215 * completely different ACs. There's no way to put a
216 * TID into multiple ath_txq's for scheduling, so
217 * for now we override the AC/TXQ selection and set
218 * non-QOS TID frames into the BE queue.
220 * This may be completely incorrect - specifically,
221 * some management frames may end up out of order
222 * compared to the QoS traffic they're controlling.
223 * I'll look into this later.
226 ath_tx_getac(struct ath_softc *sc, const struct mbuf *m0)
228 const struct ieee80211_frame *wh;
229 int pri = M_WME_GETAC(m0);
230 wh = mtod(m0, const struct ieee80211_frame *);
231 if (IEEE80211_QOS_HAS_SEQ(wh))
234 return ATH_NONQOS_TID_AC;
238 ath_txfrag_cleanup(struct ath_softc *sc,
239 ath_bufhead *frags, struct ieee80211_node *ni)
242 struct ath_buf *next;
244 ATH_TXBUF_LOCK_ASSERT(sc);
246 next = TAILQ_FIRST(frags);
247 while ((bf = next) != NULL) {
248 next = TAILQ_NEXT(bf, bf_list);
249 /* NB: bf assumed clean */
250 TAILQ_REMOVE(frags, bf, bf_list);
251 ath_returnbuf_head(sc, bf);
252 ieee80211_node_decref(ni);
257 * Setup xmit of a fragmented frame. Allocate a buffer
258 * for each frag and bump the node reference count to
259 * reflect the held reference to be setup by ath_tx_start.
262 ath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags,
263 struct mbuf *m0, struct ieee80211_node *ni)
269 for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) {
270 /* XXX non-management? */
271 bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL);
272 if (bf == NULL) { /* out of buffers, cleanup */
273 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: no buffer?\n",
275 ath_txfrag_cleanup(sc, frags, ni);
278 ieee80211_node_incref(ni);
279 TAILQ_INSERT_TAIL(frags, bf, bf_list);
281 ATH_TXBUF_UNLOCK(sc);
283 return !TAILQ_EMPTY(frags);
287 * Reclaim mbuf resources. For fragmented frames we
288 * need to claim each frag chained with m_nextpkt.
291 ath_freetx(struct mbuf *m)
299 } while ((m = next) != NULL);
303 ath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0)
308 * Load the DMA map so any coalescing is done. This
309 * also calculates the number of descriptors we need.
311 error = bus_dmamap_load_mbuf_defrag(sc->sc_dmat, bf->bf_dmamap, &m0,
312 bf->bf_segs, ATH_TXDESC, &bf->bf_nseg,
315 sc->sc_stats.ast_tx_busdma++;
321 * Discard null packets.
323 if (bf->bf_nseg == 0) {
324 sc->sc_stats.ast_tx_nodata++;
328 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n",
329 __func__, m0, m0->m_pkthdr.len);
330 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
337 * Chain together segments+descriptors for a frame - 11n or otherwise.
339 * For aggregates, this is called on each frame in the aggregate.
342 ath_tx_chaindesclist(struct ath_softc *sc, struct ath_desc *ds0,
343 struct ath_buf *bf, int is_aggr, int is_first_subframe,
344 int is_last_subframe)
346 struct ath_hal *ah = sc->sc_ah;
349 HAL_DMA_ADDR bufAddrList[4];
350 uint32_t segLenList[4];
355 * XXX There's txdma and txdma_mgmt; the descriptor
358 struct ath_descdma *dd = &sc->sc_txdma;
361 * Fillin the remainder of the descriptor info.
365 * We need the number of TX data pointers in each descriptor.
366 * EDMA and later chips support 4 TX buffers per descriptor;
367 * previous chips just support one.
369 numTxMaps = sc->sc_tx_nmaps;
372 * For EDMA and later chips ensure the TX map is fully populated
373 * before advancing to the next descriptor.
375 ds = (char *) bf->bf_desc;
377 bzero(bufAddrList, sizeof(bufAddrList));
378 bzero(segLenList, sizeof(segLenList));
379 for (i = 0; i < bf->bf_nseg; i++) {
380 bufAddrList[bp] = bf->bf_segs[i].ds_addr;
381 segLenList[bp] = bf->bf_segs[i].ds_len;
385 * Go to the next segment if this isn't the last segment
386 * and there's space in the current TX map.
388 if ((i != bf->bf_nseg - 1) && (bp < numTxMaps))
392 * Last segment or we're out of buffer pointers.
396 if (i == bf->bf_nseg - 1)
397 ath_hal_settxdesclink(ah, (struct ath_desc *) ds, 0);
399 ath_hal_settxdesclink(ah, (struct ath_desc *) ds,
400 bf->bf_daddr + dd->dd_descsize * (dsp + 1));
403 * XXX This assumes that bfs_txq is the actual destination
404 * hardware queue at this point. It may not have been
405 * assigned, it may actually be pointing to the multicast
406 * software TXQ id. These must be fixed!
408 ath_hal_filltxdesc(ah, (struct ath_desc *) ds
411 , bf->bf_descid /* XXX desc id */
412 , bf->bf_state.bfs_tx_queue
413 , isFirstDesc /* first segment */
414 , i == bf->bf_nseg - 1 /* last segment */
415 , (struct ath_desc *) ds0 /* first descriptor */
419 * Make sure the 11n aggregate fields are cleared.
421 * XXX TODO: this doesn't need to be called for
422 * aggregate frames; as it'll be called on all
423 * sub-frames. Since the descriptors are in
424 * non-cacheable memory, this leads to some
425 * rather slow writes on MIPS/ARM platforms.
427 if (ath_tx_is_11n(sc))
428 ath_hal_clr11n_aggr(sc->sc_ah, (struct ath_desc *) ds);
431 * If 11n is enabled, set it up as if it's an aggregate
434 if (is_last_subframe) {
435 ath_hal_set11n_aggr_last(sc->sc_ah,
436 (struct ath_desc *) ds);
437 } else if (is_aggr) {
439 * This clears the aggrlen field; so
440 * the caller needs to call set_aggr_first()!
442 * XXX TODO: don't call this for the first
443 * descriptor in the first frame in an
446 ath_hal_set11n_aggr_middle(sc->sc_ah,
447 (struct ath_desc *) ds,
448 bf->bf_state.bfs_ndelim);
451 bf->bf_lastds = (struct ath_desc *) ds;
454 * Don't forget to skip to the next descriptor.
456 ds += sc->sc_tx_desclen;
460 * .. and don't forget to blank these out!
462 bzero(bufAddrList, sizeof(bufAddrList));
463 bzero(segLenList, sizeof(segLenList));
465 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
469 * Set the rate control fields in the given descriptor based on
470 * the bf_state fields and node state.
472 * The bfs fields should already be set with the relevant rate
473 * control information, including whether MRR is to be enabled.
475 * Since the FreeBSD HAL currently sets up the first TX rate
476 * in ath_hal_setuptxdesc(), this will setup the MRR
477 * conditionally for the pre-11n chips, and call ath_buf_set_rate
478 * unconditionally for 11n chips. These require the 11n rate
479 * scenario to be set if MCS rates are enabled, so it's easier
480 * to just always call it. The caller can then only set rates 2, 3
481 * and 4 if multi-rate retry is needed.
484 ath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni,
487 struct ath_rc_series *rc = bf->bf_state.bfs_rc;
489 /* If mrr is disabled, blank tries 1, 2, 3 */
490 if (! bf->bf_state.bfs_ismrr)
491 rc[1].tries = rc[2].tries = rc[3].tries = 0;
495 * If NOACK is set, just set ntries=1.
497 else if (bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) {
498 rc[1].tries = rc[2].tries = rc[3].tries = 0;
504 * Always call - that way a retried descriptor will
505 * have the MRR fields overwritten.
507 * XXX TODO: see if this is really needed - setting up
508 * the first descriptor should set the MRR fields to 0
511 if (ath_tx_is_11n(sc)) {
512 ath_buf_set_rate(sc, ni, bf);
514 ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc
515 , rc[1].ratecode, rc[1].tries
516 , rc[2].ratecode, rc[2].tries
517 , rc[3].ratecode, rc[3].tries
523 * Setup segments+descriptors for an 11n aggregate.
524 * bf_first is the first buffer in the aggregate.
525 * The descriptor list must already been linked together using
529 ath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first)
531 struct ath_buf *bf, *bf_prev = NULL;
532 struct ath_desc *ds0 = bf_first->bf_desc;
534 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n",
535 __func__, bf_first->bf_state.bfs_nframes,
536 bf_first->bf_state.bfs_al);
540 if (bf->bf_state.bfs_txrate0 == 0)
541 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: bf=%p, txrate0=%d\n",
543 if (bf->bf_state.bfs_rc[0].ratecode == 0)
544 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: bf=%p, rix0=%d\n",
548 * Setup all descriptors of all subframes - this will
549 * call ath_hal_set11naggrmiddle() on every frame.
552 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
553 "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n",
554 __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen,
555 SEQNO(bf->bf_state.bfs_seqno));
558 * Setup the initial fields for the first descriptor - all
559 * the non-11n specific stuff.
561 ath_hal_setuptxdesc(sc->sc_ah, bf->bf_desc
562 , bf->bf_state.bfs_pktlen /* packet length */
563 , bf->bf_state.bfs_hdrlen /* header length */
564 , bf->bf_state.bfs_atype /* Atheros packet type */
565 , bf->bf_state.bfs_txpower /* txpower */
566 , bf->bf_state.bfs_txrate0
567 , bf->bf_state.bfs_try0 /* series 0 rate/tries */
568 , bf->bf_state.bfs_keyix /* key cache index */
569 , bf->bf_state.bfs_txantenna /* antenna mode */
570 , bf->bf_state.bfs_txflags | HAL_TXDESC_INTREQ /* flags */
571 , bf->bf_state.bfs_ctsrate /* rts/cts rate */
572 , bf->bf_state.bfs_ctsduration /* rts/cts duration */
576 * First descriptor? Setup the rate control and initial
577 * aggregate header information.
579 if (bf == bf_first) {
581 * setup first desc with rate and aggr info
583 ath_tx_set_ratectrl(sc, bf->bf_node, bf);
587 * Setup the descriptors for a multi-descriptor frame.
588 * This is both aggregate and non-aggregate aware.
590 ath_tx_chaindesclist(sc, ds0, bf,
592 !! (bf == bf_first), /* is_first_subframe */
593 !! (bf->bf_next == NULL) /* is_last_subframe */
596 if (bf == bf_first) {
598 * Initialise the first 11n aggregate with the
599 * aggregate length and aggregate enable bits.
601 ath_hal_set11n_aggr_first(sc->sc_ah,
604 bf->bf_state.bfs_ndelim);
608 * Link the last descriptor of the previous frame
609 * to the beginning descriptor of this frame.
612 ath_hal_settxdesclink(sc->sc_ah, bf_prev->bf_lastds,
615 /* Save a copy so we can link the next descriptor in */
621 * Set the first descriptor bf_lastds field to point to
622 * the last descriptor in the last subframe, that's where
623 * the status update will occur.
625 bf_first->bf_lastds = bf_prev->bf_lastds;
628 * And bf_last in the first descriptor points to the end of
629 * the aggregate list.
631 bf_first->bf_last = bf_prev;
634 * For non-AR9300 NICs, which require the rate control
635 * in the final descriptor - let's set that up now.
637 * This is because the filltxdesc() HAL call doesn't
638 * populate the last segment with rate control information
639 * if firstSeg is also true. For non-aggregate frames
640 * that is fine, as the first frame already has rate control
641 * info. But if the last frame in an aggregate has one
642 * descriptor, both firstseg and lastseg will be true and
643 * the rate info isn't copied.
645 * This is inefficient on MIPS/ARM platforms that have
646 * non-cachable memory for TX descriptors, but we'll just
649 * As to why the rate table is stashed in the last descriptor
650 * rather than the first descriptor? Because proctxdesc()
651 * is called on the final descriptor in an MPDU or A-MPDU -
652 * ie, the one that gets updated by the hardware upon
653 * completion. That way proctxdesc() doesn't need to know
654 * about the first _and_ last TX descriptor.
656 ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_lastds, ds0);
658 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__);
662 * Hand-off a frame to the multicast TX queue.
664 * This is a software TXQ which will be appended to the CAB queue
665 * during the beacon setup code.
667 * XXX TODO: since the AR9300 EDMA TX queue support wants the QCU ID
668 * as part of the TX descriptor, bf_state.bfs_tx_queue must be updated
669 * with the actual hardware txq, or all of this will fall apart.
671 * XXX It may not be a bad idea to just stuff the QCU ID into bf_state
672 * and retire bfs_tx_queue; then make sure the CABQ QCU ID is populated
676 ath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq,
679 ATH_TX_LOCK_ASSERT(sc);
681 KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0,
682 ("%s: busy status 0x%x", __func__, bf->bf_flags));
685 * Ensure that the tx queue is the cabq, so things get
688 if (bf->bf_state.bfs_tx_queue != sc->sc_cabq->axq_qnum) {
689 DPRINTF(sc, ATH_DEBUG_XMIT,
690 "%s: bf=%p, bfs_tx_queue=%d, axq_qnum=%d\n",
691 __func__, bf, bf->bf_state.bfs_tx_queue,
696 if (ATH_TXQ_LAST(txq, axq_q_s) != NULL) {
697 struct ath_buf *bf_last = ATH_TXQ_LAST(txq, axq_q_s);
698 struct ieee80211_frame *wh;
700 /* mark previous frame */
701 wh = mtod(bf_last->bf_m, struct ieee80211_frame *);
702 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
703 bus_dmamap_sync(sc->sc_dmat, bf_last->bf_dmamap,
704 BUS_DMASYNC_PREWRITE);
706 /* link descriptor */
707 ath_hal_settxdesclink(sc->sc_ah,
711 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
716 * Hand-off packet to a hardware queue.
719 ath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq,
722 struct ath_hal *ah = sc->sc_ah;
723 struct ath_buf *bf_first;
726 * Insert the frame on the outbound list and pass it on
727 * to the hardware. Multicast frames buffered for power
728 * save stations and transmit from the CAB queue are stored
729 * on a s/w only queue and loaded on to the CAB queue in
730 * the SWBA handler since frames only go out on DTIM and
731 * to avoid possible races.
733 ATH_TX_LOCK_ASSERT(sc);
734 KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0,
735 ("%s: busy status 0x%x", __func__, bf->bf_flags));
736 KASSERT(txq->axq_qnum != ATH_TXQ_SWQ,
737 ("ath_tx_handoff_hw called for mcast queue"));
740 * XXX racy, should hold the PCU lock when checking this,
741 * and also should ensure that the TX counter is >0!
743 KASSERT((sc->sc_inreset_cnt == 0),
744 ("%s: TX during reset?\n", __func__));
748 * This causes a LOR. Find out where the PCU lock is being
749 * held whilst the TXQ lock is grabbed - that shouldn't
753 if (sc->sc_inreset_cnt) {
755 DPRINTF(sc, ATH_DEBUG_RESET,
756 "%s: called with sc_in_reset != 0\n",
758 DPRINTF(sc, ATH_DEBUG_XMIT,
759 "%s: queued: TXDP[%u] = %p (%p) depth %d\n",
760 __func__, txq->axq_qnum,
761 (caddr_t)bf->bf_daddr, bf->bf_desc,
763 /* XXX axq_link needs to be set and updated! */
764 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
765 if (bf->bf_state.bfs_aggr)
766 txq->axq_aggr_depth++;
775 * XXX TODO: if there's a holdingbf, then
776 * ATH_TXQ_PUTRUNNING should be clear.
778 * If there is a holdingbf and the list is empty,
779 * then axq_link should be pointing to the holdingbf.
781 * Otherwise it should point to the last descriptor
782 * in the last ath_buf.
784 * In any case, we should really ensure that we
785 * update the previous descriptor link pointer to
786 * this descriptor, regardless of all of the above state.
788 * For now this is captured by having axq_link point
789 * to either the holdingbf (if the TXQ list is empty)
790 * or the end of the list (if the TXQ list isn't empty.)
791 * I'd rather just kill axq_link here and do it as above.
795 * Append the frame to the TX queue.
797 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
798 ATH_KTR(sc, ATH_KTR_TX, 3,
799 "ath_tx_handoff: non-tdma: txq=%u, add bf=%p "
806 * If there's a link pointer, update it.
808 * XXX we should replace this with the above logic, just
809 * to kill axq_link with fire.
811 if (txq->axq_link != NULL) {
812 *txq->axq_link = bf->bf_daddr;
813 DPRINTF(sc, ATH_DEBUG_XMIT,
814 "%s: link[%u](%p)=%p (%p) depth %d\n", __func__,
815 txq->axq_qnum, txq->axq_link,
816 (caddr_t)bf->bf_daddr, bf->bf_desc,
818 ATH_KTR(sc, ATH_KTR_TX, 5,
819 "ath_tx_handoff: non-tdma: link[%u](%p)=%p (%p) "
821 txq->axq_qnum, txq->axq_link,
822 (caddr_t)bf->bf_daddr, bf->bf_desc,
827 * If we've not pushed anything into the hardware yet,
828 * push the head of the queue into the TxDP.
830 * Once we've started DMA, there's no guarantee that
831 * updating the TxDP with a new value will actually work.
832 * So we just don't do that - if we hit the end of the list,
833 * we keep that buffer around (the "holding buffer") and
834 * re-start DMA by updating the link pointer of _that_
835 * descriptor and then restart DMA.
837 if (! (txq->axq_flags & ATH_TXQ_PUTRUNNING)) {
838 bf_first = TAILQ_FIRST(&txq->axq_q);
839 txq->axq_flags |= ATH_TXQ_PUTRUNNING;
840 ath_hal_puttxbuf(ah, txq->axq_qnum, bf_first->bf_daddr);
841 DPRINTF(sc, ATH_DEBUG_XMIT,
842 "%s: TXDP[%u] = %p (%p) depth %d\n",
843 __func__, txq->axq_qnum,
844 (caddr_t)bf_first->bf_daddr, bf_first->bf_desc,
846 ATH_KTR(sc, ATH_KTR_TX, 5,
847 "ath_tx_handoff: TXDP[%u] = %p (%p) "
848 "lastds=%p depth %d",
850 (caddr_t)bf_first->bf_daddr, bf_first->bf_desc,
856 * Ensure that the bf TXQ matches this TXQ, so later
857 * checking and holding buffer manipulation is sane.
859 if (bf->bf_state.bfs_tx_queue != txq->axq_qnum) {
860 DPRINTF(sc, ATH_DEBUG_XMIT,
861 "%s: bf=%p, bfs_tx_queue=%d, axq_qnum=%d\n",
862 __func__, bf, bf->bf_state.bfs_tx_queue,
867 * Track aggregate queue depth.
869 if (bf->bf_state.bfs_aggr)
870 txq->axq_aggr_depth++;
873 * Update the link pointer.
875 ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link);
880 * If we wrote a TxDP above, DMA will start from here.
882 * If DMA is running, it'll do nothing.
884 * If the DMA engine hit the end of the QCU list (ie LINK=NULL,
885 * or VEOL) then it stops at the last transmitted write.
886 * We then append a new frame by updating the link pointer
887 * in that descriptor and then kick TxE here; it will re-read
888 * that last descriptor and find the new descriptor to transmit.
890 * This is why we keep the holding descriptor around.
892 ath_hal_txstart(ah, txq->axq_qnum);
894 ATH_KTR(sc, ATH_KTR_TX, 1,
895 "ath_tx_handoff: txq=%u, txstart", txq->axq_qnum);
899 * Restart TX DMA for the given TXQ.
901 * This must be called whether the queue is empty or not.
904 ath_legacy_tx_dma_restart(struct ath_softc *sc, struct ath_txq *txq)
906 struct ath_buf *bf, *bf_last;
908 ATH_TXQ_LOCK_ASSERT(txq);
910 /* XXX make this ATH_TXQ_FIRST */
911 bf = TAILQ_FIRST(&txq->axq_q);
912 bf_last = ATH_TXQ_LAST(txq, axq_q_s);
917 DPRINTF(sc, ATH_DEBUG_RESET,
918 "%s: Q%d: bf=%p, bf_last=%p, daddr=0x%08x\n",
923 (uint32_t) bf->bf_daddr);
926 if (sc->sc_debug & ATH_DEBUG_RESET)
927 ath_tx_dump(sc, txq);
931 * This is called from a restart, so DMA is known to be
932 * completely stopped.
934 KASSERT((!(txq->axq_flags & ATH_TXQ_PUTRUNNING)),
935 ("%s: Q%d: called with PUTRUNNING=1\n",
939 ath_hal_puttxbuf(sc->sc_ah, txq->axq_qnum, bf->bf_daddr);
940 txq->axq_flags |= ATH_TXQ_PUTRUNNING;
942 ath_hal_gettxdesclinkptr(sc->sc_ah, bf_last->bf_lastds,
944 ath_hal_txstart(sc->sc_ah, txq->axq_qnum);
948 * Hand off a packet to the hardware (or mcast queue.)
950 * The relevant hardware txq should be locked.
953 ath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq,
956 ATH_TX_LOCK_ASSERT(sc);
959 if (if_ath_alq_checkdebug(&sc->sc_alq, ATH_ALQ_EDMA_TXDESC))
960 ath_tx_alq_post(sc, bf);
963 if (txq->axq_qnum == ATH_TXQ_SWQ)
964 ath_tx_handoff_mcast(sc, txq, bf);
966 ath_tx_handoff_hw(sc, txq, bf);
970 ath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni,
971 struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen,
974 DPRINTF(sc, ATH_DEBUG_XMIT,
975 "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n",
984 const struct ieee80211_cipher *cip;
985 struct ieee80211_key *k;
988 * Construct the 802.11 header+trailer for an encrypted
989 * frame. The only reason this can fail is because of an
990 * unknown or unsupported cipher/key type.
992 k = ieee80211_crypto_encap(ni, m0);
995 * This can happen when the key is yanked after the
996 * frame was queued. Just discard the frame; the
997 * 802.11 layer counts failures and provides
998 * debugging/diagnostics.
1003 * Adjust the packet + header lengths for the crypto
1004 * additions and calculate the h/w key index. When
1005 * a s/w mic is done the frame will have had any mic
1006 * added to it prior to entry so m0->m_pkthdr.len will
1007 * account for it. Otherwise we need to add it to the
1011 (*hdrlen) += cip->ic_header;
1012 (*pktlen) += cip->ic_header + cip->ic_trailer;
1013 /* NB: frags always have any TKIP MIC done in s/w */
1014 if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag)
1015 (*pktlen) += cip->ic_miclen;
1016 (*keyix) = k->wk_keyix;
1017 } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) {
1019 * Use station key cache slot, if assigned.
1021 (*keyix) = ni->ni_ucastkey.wk_keyix;
1022 if ((*keyix) == IEEE80211_KEYIX_NONE)
1023 (*keyix) = HAL_TXKEYIX_INVALID;
1025 (*keyix) = HAL_TXKEYIX_INVALID;
1031 * Calculate whether interoperability protection is required for
1034 * This requires the rate control information be filled in,
1035 * as the protection requirement depends upon the current
1036 * operating mode / PHY.
1039 ath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf)
1041 struct ieee80211_frame *wh;
1045 const HAL_RATE_TABLE *rt = sc->sc_currates;
1046 struct ifnet *ifp = sc->sc_ifp;
1047 struct ieee80211com *ic = ifp->if_l2com;
1049 flags = bf->bf_state.bfs_txflags;
1050 rix = bf->bf_state.bfs_rc[0].rix;
1051 shortPreamble = bf->bf_state.bfs_shpream;
1052 wh = mtod(bf->bf_m, struct ieee80211_frame *);
1055 * If 802.11g protection is enabled, determine whether
1056 * to use RTS/CTS or just CTS. Note that this is only
1057 * done for OFDM unicast frames.
1059 if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
1060 rt->info[rix].phy == IEEE80211_T_OFDM &&
1061 (flags & HAL_TXDESC_NOACK) == 0) {
1062 bf->bf_state.bfs_doprot = 1;
1063 /* XXX fragments must use CCK rates w/ protection */
1064 if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) {
1065 flags |= HAL_TXDESC_RTSENA;
1066 } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) {
1067 flags |= HAL_TXDESC_CTSENA;
1070 * For frags it would be desirable to use the
1071 * highest CCK rate for RTS/CTS. But stations
1072 * farther away may detect it at a lower CCK rate
1073 * so use the configured protection rate instead
1076 sc->sc_stats.ast_tx_protect++;
1080 * If 11n protection is enabled and it's a HT frame,
1083 * XXX ic_htprotmode or ic_curhtprotmode?
1084 * XXX should it_htprotmode only matter if ic_curhtprotmode
1085 * XXX indicates it's not a HT pure environment?
1087 if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) &&
1088 rt->info[rix].phy == IEEE80211_T_HT &&
1089 (flags & HAL_TXDESC_NOACK) == 0) {
1090 flags |= HAL_TXDESC_RTSENA;
1091 sc->sc_stats.ast_tx_htprotect++;
1093 bf->bf_state.bfs_txflags = flags;
1097 * Update the frame duration given the currently selected rate.
1099 * This also updates the frame duration value, so it will require
1103 ath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf)
1105 struct ieee80211_frame *wh;
1109 struct ath_hal *ah = sc->sc_ah;
1110 const HAL_RATE_TABLE *rt = sc->sc_currates;
1111 int isfrag = bf->bf_m->m_flags & M_FRAG;
1113 flags = bf->bf_state.bfs_txflags;
1114 rix = bf->bf_state.bfs_rc[0].rix;
1115 shortPreamble = bf->bf_state.bfs_shpream;
1116 wh = mtod(bf->bf_m, struct ieee80211_frame *);
1119 * Calculate duration. This logically belongs in the 802.11
1120 * layer but it lacks sufficient information to calculate it.
1122 if ((flags & HAL_TXDESC_NOACK) == 0 &&
1123 (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) {
1126 dur = rt->info[rix].spAckDuration;
1128 dur = rt->info[rix].lpAckDuration;
1129 if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) {
1130 dur += dur; /* additional SIFS+ACK */
1132 * Include the size of next fragment so NAV is
1133 * updated properly. The last fragment uses only
1136 * XXX TODO: ensure that the rate lookup for each
1137 * fragment is the same as the rate used by the
1140 dur += ath_hal_computetxtime(ah,
1143 rix, shortPreamble);
1147 * Force hardware to use computed duration for next
1148 * fragment by disabling multi-rate retry which updates
1149 * duration based on the multi-rate duration table.
1151 bf->bf_state.bfs_ismrr = 0;
1152 bf->bf_state.bfs_try0 = ATH_TXMGTTRY;
1153 /* XXX update bfs_rc[0].try? */
1156 /* Update the duration field itself */
1157 *(u_int16_t *)wh->i_dur = htole16(dur);
1162 ath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt,
1163 int cix, int shortPreamble)
1168 * CTS transmit rate is derived from the transmit rate
1169 * by looking in the h/w rate table. We must also factor
1170 * in whether or not a short preamble is to be used.
1172 /* NB: cix is set above where RTS/CTS is enabled */
1173 KASSERT(cix != 0xff, ("cix not setup"));
1174 ctsrate = rt->info[cix].rateCode;
1176 /* XXX this should only matter for legacy rates */
1178 ctsrate |= rt->info[cix].shortPreamble;
1184 * Calculate the RTS/CTS duration for legacy frames.
1187 ath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix,
1188 int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt,
1191 int ctsduration = 0;
1193 /* This mustn't be called for HT modes */
1194 if (rt->info[cix].phy == IEEE80211_T_HT) {
1195 kprintf("%s: HT rate where it shouldn't be (0x%x)\n",
1196 __func__, rt->info[cix].rateCode);
1201 * Compute the transmit duration based on the frame
1202 * size and the size of an ACK frame. We call into the
1203 * HAL to do the computation since it depends on the
1204 * characteristics of the actual PHY being used.
1206 * NB: CTS is assumed the same size as an ACK so we can
1207 * use the precalculated ACK durations.
1209 if (shortPreamble) {
1210 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */
1211 ctsduration += rt->info[cix].spAckDuration;
1212 ctsduration += ath_hal_computetxtime(ah,
1213 rt, pktlen, rix, AH_TRUE);
1214 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */
1215 ctsduration += rt->info[rix].spAckDuration;
1217 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */
1218 ctsduration += rt->info[cix].lpAckDuration;
1219 ctsduration += ath_hal_computetxtime(ah,
1220 rt, pktlen, rix, AH_FALSE);
1221 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */
1222 ctsduration += rt->info[rix].lpAckDuration;
1225 return (ctsduration);
1229 * Update the given ath_buf with updated rts/cts setup and duration
1232 * To support rate lookups for each software retry, the rts/cts rate
1233 * and cts duration must be re-calculated.
1235 * This function assumes the RTS/CTS flags have been set as needed;
1236 * mrr has been disabled; and the rate control lookup has been done.
1238 * XXX TODO: MRR need only be disabled for the pre-11n NICs.
1239 * XXX The 11n NICs support per-rate RTS/CTS configuration.
1242 ath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf)
1244 uint16_t ctsduration = 0;
1245 uint8_t ctsrate = 0;
1246 uint8_t rix = bf->bf_state.bfs_rc[0].rix;
1248 const HAL_RATE_TABLE *rt = sc->sc_currates;
1251 * No RTS/CTS enabled? Don't bother.
1253 if ((bf->bf_state.bfs_txflags &
1254 (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) {
1255 /* XXX is this really needed? */
1256 bf->bf_state.bfs_ctsrate = 0;
1257 bf->bf_state.bfs_ctsduration = 0;
1262 * If protection is enabled, use the protection rix control
1263 * rate. Otherwise use the rate0 control rate.
1265 if (bf->bf_state.bfs_doprot)
1266 rix = sc->sc_protrix;
1268 rix = bf->bf_state.bfs_rc[0].rix;
1271 * If the raw path has hard-coded ctsrate0 to something,
1274 if (bf->bf_state.bfs_ctsrate0 != 0)
1275 cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0);
1277 /* Control rate from above */
1278 cix = rt->info[rix].controlRate;
1280 /* Calculate the rtscts rate for the given cix */
1281 ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix,
1282 bf->bf_state.bfs_shpream);
1284 /* The 11n chipsets do ctsduration calculations for you */
1285 if (! ath_tx_is_11n(sc))
1286 ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix,
1287 bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen,
1288 rt, bf->bf_state.bfs_txflags);
1290 /* Squirrel away in ath_buf */
1291 bf->bf_state.bfs_ctsrate = ctsrate;
1292 bf->bf_state.bfs_ctsduration = ctsduration;
1295 * Must disable multi-rate retry when using RTS/CTS.
1297 if (!sc->sc_mrrprot) {
1298 bf->bf_state.bfs_ismrr = 0;
1299 bf->bf_state.bfs_try0 =
1300 bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */
1305 * Setup the descriptor chain for a normal or fast-frame
1308 * XXX TODO: extend to include the destination hardware QCU ID.
1309 * Make sure that is correct. Make sure that when being added
1310 * to the mcastq, the CABQ QCUID is set or things will get a bit
1314 ath_tx_setds(struct ath_softc *sc, struct ath_buf *bf)
1316 struct ath_desc *ds = bf->bf_desc;
1317 struct ath_hal *ah = sc->sc_ah;
1319 if (bf->bf_state.bfs_txrate0 == 0)
1320 DPRINTF(sc, ATH_DEBUG_XMIT,
1321 "%s: bf=%p, txrate0=%d\n", __func__, bf, 0);
1323 ath_hal_setuptxdesc(ah, ds
1324 , bf->bf_state.bfs_pktlen /* packet length */
1325 , bf->bf_state.bfs_hdrlen /* header length */
1326 , bf->bf_state.bfs_atype /* Atheros packet type */
1327 , bf->bf_state.bfs_txpower /* txpower */
1328 , bf->bf_state.bfs_txrate0
1329 , bf->bf_state.bfs_try0 /* series 0 rate/tries */
1330 , bf->bf_state.bfs_keyix /* key cache index */
1331 , bf->bf_state.bfs_txantenna /* antenna mode */
1332 , bf->bf_state.bfs_txflags /* flags */
1333 , bf->bf_state.bfs_ctsrate /* rts/cts rate */
1334 , bf->bf_state.bfs_ctsduration /* rts/cts duration */
1338 * This will be overriden when the descriptor chain is written.
1343 /* Set rate control and descriptor chain for this frame */
1344 ath_tx_set_ratectrl(sc, bf->bf_node, bf);
1345 ath_tx_chaindesclist(sc, ds, bf, 0, 0, 0);
1351 * This performs a rate lookup for the given ath_buf only if it's required.
1352 * Non-data frames and raw frames don't require it.
1354 * This populates the primary and MRR entries; MRR values are
1355 * then disabled later on if something requires it (eg RTS/CTS on
1358 * This needs to be done before the RTS/CTS fields are calculated
1359 * as they may depend upon the rate chosen.
1362 ath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf)
1367 if (! bf->bf_state.bfs_doratelookup)
1370 /* Get rid of any previous state */
1371 bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
1373 ATH_NODE_LOCK(ATH_NODE(bf->bf_node));
1374 ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream,
1375 bf->bf_state.bfs_pktlen, &rix, &try0, &rate);
1377 /* In case MRR is disabled, make sure rc[0] is setup correctly */
1378 bf->bf_state.bfs_rc[0].rix = rix;
1379 bf->bf_state.bfs_rc[0].ratecode = rate;
1380 bf->bf_state.bfs_rc[0].tries = try0;
1382 if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY)
1383 ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix,
1384 bf->bf_state.bfs_rc);
1385 ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node));
1387 sc->sc_txrix = rix; /* for LED blinking */
1388 sc->sc_lastdatarix = rix; /* for fast frames */
1389 bf->bf_state.bfs_try0 = try0;
1390 bf->bf_state.bfs_txrate0 = rate;
1394 * Update the CLRDMASK bit in the ath_buf if it needs to be set.
1397 ath_tx_update_clrdmask(struct ath_softc *sc, struct ath_tid *tid,
1400 struct ath_node *an = ATH_NODE(bf->bf_node);
1402 ATH_TX_LOCK_ASSERT(sc);
1404 if (an->clrdmask == 1) {
1405 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
1411 * Return whether this frame should be software queued or
1412 * direct dispatched.
1414 * When doing powersave, BAR frames should be queued but other management
1415 * frames should be directly sent.
1417 * When not doing powersave, stick BAR frames into the hardware queue
1418 * so it goes out even though the queue is paused.
1420 * For now, management frames are also software queued by default.
1423 ath_tx_should_swq_frame(struct ath_softc *sc, struct ath_node *an,
1424 struct mbuf *m0, int *queue_to_head)
1426 struct ieee80211_node *ni = &an->an_node;
1427 struct ieee80211_frame *wh;
1428 uint8_t type, subtype;
1430 wh = mtod(m0, struct ieee80211_frame *);
1431 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1432 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1434 (*queue_to_head) = 0;
1436 /* If it's not in powersave - direct-dispatch BAR */
1437 if ((ATH_NODE(ni)->an_is_powersave == 0)
1438 && type == IEEE80211_FC0_TYPE_CTL &&
1439 subtype == IEEE80211_FC0_SUBTYPE_BAR) {
1440 DPRINTF(sc, ATH_DEBUG_SW_TX,
1441 "%s: BAR: TX'ing direct\n", __func__);
1443 } else if ((ATH_NODE(ni)->an_is_powersave == 1)
1444 && type == IEEE80211_FC0_TYPE_CTL &&
1445 subtype == IEEE80211_FC0_SUBTYPE_BAR) {
1446 /* BAR TX whilst asleep; queue */
1447 DPRINTF(sc, ATH_DEBUG_SW_TX,
1448 "%s: swq: TX'ing\n", __func__);
1449 (*queue_to_head) = 1;
1451 } else if ((ATH_NODE(ni)->an_is_powersave == 1)
1452 && (type == IEEE80211_FC0_TYPE_MGT ||
1453 type == IEEE80211_FC0_TYPE_CTL)) {
1455 * Other control/mgmt frame; bypass software queuing
1458 DPRINTF(sc, ATH_DEBUG_XMIT,
1459 "%s: %6D: Node is asleep; sending mgmt "
1460 "(type=%d, subtype=%d)\n",
1461 __func__, ni->ni_macaddr, ":", type, subtype);
1470 * Transmit the given frame to the hardware.
1472 * The frame must already be setup; rate control must already have
1475 * XXX since the TXQ lock is being held here (and I dislike holding
1476 * it for this long when not doing software aggregation), later on
1477 * break this function into "setup_normal" and "xmit_normal". The
1478 * lock only needs to be held for the ath_tx_handoff call.
1480 * XXX we don't update the leak count here - if we're doing
1481 * direct frame dispatch, we need to be able to do it without
1482 * decrementing the leak count (eg multicast queue frames.)
1485 ath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq,
1488 struct ath_node *an = ATH_NODE(bf->bf_node);
1489 struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid];
1491 ATH_TX_LOCK_ASSERT(sc);
1494 * For now, just enable CLRDMASK. ath_tx_xmit_normal() does
1495 * set a completion handler however it doesn't (yet) properly
1496 * handle the strict ordering requirements needed for normal,
1497 * non-aggregate session frames.
1499 * Once this is implemented, only set CLRDMASK like this for
1500 * frames that must go out - eg management/raw frames.
1502 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
1504 /* Setup the descriptor before handoff */
1505 ath_tx_do_ratelookup(sc, bf);
1506 ath_tx_calc_duration(sc, bf);
1507 ath_tx_calc_protection(sc, bf);
1508 ath_tx_set_rtscts(sc, bf);
1509 ath_tx_rate_fill_rcflags(sc, bf);
1510 ath_tx_setds(sc, bf);
1512 /* Track per-TID hardware queue depth correctly */
1515 /* Assign the completion handler */
1516 bf->bf_comp = ath_tx_normal_comp;
1518 /* Hand off to hardware */
1519 ath_tx_handoff(sc, txq, bf);
1523 * Do the basic frame setup stuff that's required before the frame
1524 * is added to a software queue.
1526 * All frames get mostly the same treatment and it's done once.
1527 * Retransmits fiddle with things like the rate control setup,
1528 * setting the retransmit bit in the packet; doing relevant DMA/bus
1529 * syncing and relinking it (back) into the hardware TX queue.
1531 * Note that this may cause the mbuf to be reallocated, so
1532 * m0 may not be valid.
1535 ath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni,
1536 struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq)
1538 struct ieee80211vap *vap = ni->ni_vap;
1539 struct ath_hal *ah = sc->sc_ah;
1540 struct ifnet *ifp = sc->sc_ifp;
1541 struct ieee80211com *ic = ifp->if_l2com;
1542 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams;
1543 int error, iswep, ismcast, isfrag, ismrr;
1544 int keyix, hdrlen, pktlen, try0 = 0;
1545 u_int8_t rix = 0, txrate = 0;
1546 struct ath_desc *ds;
1547 struct ieee80211_frame *wh;
1548 u_int subtype, flags;
1550 const HAL_RATE_TABLE *rt;
1551 HAL_BOOL shortPreamble;
1552 struct ath_node *an;
1556 * To ensure that both sequence numbers and the CCMP PN handling
1557 * is "correct", make sure that the relevant TID queue is locked.
1558 * Otherwise the CCMP PN and seqno may appear out of order, causing
1559 * re-ordered frames to have out of order CCMP PN's, resulting
1560 * in many, many frame drops.
1562 ATH_TX_LOCK_ASSERT(sc);
1564 wh = mtod(m0, struct ieee80211_frame *);
1565 iswep = wh->i_fc[1] & IEEE80211_FC1_WEP;
1566 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1567 isfrag = m0->m_flags & M_FRAG;
1568 hdrlen = ieee80211_anyhdrsize(wh);
1570 * Packet length must not include any
1571 * pad bytes; deduct them here.
1573 pktlen = m0->m_pkthdr.len - (hdrlen & 3);
1575 /* Handle encryption twiddling if needed */
1576 if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen,
1582 /* packet header may have moved, reset our local pointer */
1583 wh = mtod(m0, struct ieee80211_frame *);
1585 pktlen += IEEE80211_CRC_LEN;
1588 * Load the DMA map so any coalescing is done. This
1589 * also calculates the number of descriptors we need.
1591 error = ath_tx_dmasetup(sc, bf, m0);
1594 bf->bf_node = ni; /* NB: held reference */
1595 m0 = bf->bf_m; /* NB: may have changed */
1596 wh = mtod(m0, struct ieee80211_frame *);
1598 /* setup descriptors */
1600 rt = sc->sc_currates;
1601 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
1604 * NB: the 802.11 layer marks whether or not we should
1605 * use short preamble based on the current mode and
1606 * negotiated parameters.
1608 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
1609 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) {
1610 shortPreamble = AH_TRUE;
1611 sc->sc_stats.ast_tx_shortpre++;
1613 shortPreamble = AH_FALSE;
1617 //flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */
1619 ismrr = 0; /* default no multi-rate retry*/
1620 pri = M_WME_GETAC(m0); /* honor classification */
1621 /* XXX use txparams instead of fixed values */
1623 * Calculate Atheros packet type from IEEE80211 packet header,
1624 * setup for rate calculations, and select h/w transmit queue.
1626 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
1627 case IEEE80211_FC0_TYPE_MGT:
1628 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1629 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON)
1630 atype = HAL_PKT_TYPE_BEACON;
1631 else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1632 atype = HAL_PKT_TYPE_PROBE_RESP;
1633 else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM)
1634 atype = HAL_PKT_TYPE_ATIM;
1636 atype = HAL_PKT_TYPE_NORMAL; /* XXX */
1637 rix = an->an_mgmtrix;
1638 txrate = rt->info[rix].rateCode;
1640 txrate |= rt->info[rix].shortPreamble;
1641 try0 = ATH_TXMGTTRY;
1642 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
1644 case IEEE80211_FC0_TYPE_CTL:
1645 atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */
1646 rix = an->an_mgmtrix;
1647 txrate = rt->info[rix].rateCode;
1649 txrate |= rt->info[rix].shortPreamble;
1650 try0 = ATH_TXMGTTRY;
1651 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
1653 case IEEE80211_FC0_TYPE_DATA:
1654 atype = HAL_PKT_TYPE_NORMAL; /* default */
1656 * Data frames: multicast frames go out at a fixed rate,
1657 * EAPOL frames use the mgmt frame rate; otherwise consult
1658 * the rate control module for the rate to use.
1661 rix = an->an_mcastrix;
1662 txrate = rt->info[rix].rateCode;
1664 txrate |= rt->info[rix].shortPreamble;
1666 } else if (m0->m_flags & M_EAPOL) {
1667 /* XXX? maybe always use long preamble? */
1668 rix = an->an_mgmtrix;
1669 txrate = rt->info[rix].rateCode;
1671 txrate |= rt->info[rix].shortPreamble;
1672 try0 = ATH_TXMAXTRY; /* XXX?too many? */
1675 * Do rate lookup on each TX, rather than using
1676 * the hard-coded TX information decided here.
1679 bf->bf_state.bfs_doratelookup = 1;
1681 if (cap->cap_wmeParams[pri].wmep_noackPolicy)
1682 flags |= HAL_TXDESC_NOACK;
1685 if_printf(ifp, "bogus frame type 0x%x (%s)\n",
1686 wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__);
1688 /* XXX free tx dmamap */
1694 * There are two known scenarios where the frame AC doesn't match
1695 * what the destination TXQ is.
1697 * + non-QoS frames (eg management?) that the net80211 stack has
1698 * assigned a higher AC to, but since it's a non-QoS TID, it's
1699 * being thrown into TID 16. TID 16 gets the AC_BE queue.
1700 * It's quite possible that management frames should just be
1701 * direct dispatched to hardware rather than go via the software
1702 * queue; that should be investigated in the future. There are
1703 * some specific scenarios where this doesn't make sense, mostly
1704 * surrounding ADDBA request/response - hence why that is special
1707 * + Multicast frames going into the VAP mcast queue. That shows up
1710 * This driver should eventually support separate TID and TXQ locking,
1711 * allowing for arbitrary AC frames to appear on arbitrary software
1712 * queues, being queued to the "correct" hardware queue when needed.
1715 if (txq != sc->sc_ac2q[pri]) {
1716 DPRINTF(sc, ATH_DEBUG_XMIT,
1717 "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n",
1723 sc->sc_ac2q[pri]->axq_qnum);
1728 * Calculate miscellaneous flags.
1731 flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */
1732 } else if (pktlen > vap->iv_rtsthreshold &&
1733 (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) {
1734 flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */
1735 sc->sc_stats.ast_tx_rts++;
1737 if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */
1738 sc->sc_stats.ast_tx_noack++;
1739 #ifdef IEEE80211_SUPPORT_TDMA
1740 if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) {
1741 DPRINTF(sc, ATH_DEBUG_TDMA,
1742 "%s: discard frame, ACK required w/ TDMA\n", __func__);
1743 sc->sc_stats.ast_tdma_ack++;
1744 /* XXX free tx dmamap */
1751 * Determine if a tx interrupt should be generated for
1752 * this descriptor. We take a tx interrupt to reap
1753 * descriptors when the h/w hits an EOL condition or
1754 * when the descriptor is specifically marked to generate
1755 * an interrupt. We periodically mark descriptors in this
1756 * way to insure timely replenishing of the supply needed
1757 * for sending frames. Defering interrupts reduces system
1758 * load and potentially allows more concurrent work to be
1759 * done but if done to aggressively can cause senders to
1762 * NB: use >= to deal with sc_txintrperiod changing
1763 * dynamically through sysctl.
1765 if (flags & HAL_TXDESC_INTREQ) {
1766 txq->axq_intrcnt = 0;
1767 } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) {
1768 flags |= HAL_TXDESC_INTREQ;
1769 txq->axq_intrcnt = 0;
1772 /* This point forward is actual TX bits */
1775 * At this point we are committed to sending the frame
1776 * and we don't need to look at m_nextpkt; clear it in
1777 * case this frame is part of frag chain.
1779 m0->m_nextpkt = NULL;
1781 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT))
1782 ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len,
1783 sc->sc_hwmap[rix].ieeerate, -1);
1785 if (ieee80211_radiotap_active_vap(vap)) {
1786 u_int64_t tsf = ath_hal_gettsf64(ah);
1788 sc->sc_tx_th.wt_tsf = htole64(tsf);
1789 sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags;
1791 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
1793 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG;
1794 sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate;
1795 sc->sc_tx_th.wt_txpower = ieee80211_get_node_txpower(ni);
1796 sc->sc_tx_th.wt_antenna = sc->sc_txantenna;
1798 ieee80211_radiotap_tx(vap, m0);
1801 /* Blank the legacy rate array */
1802 bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
1805 * ath_buf_set_rate needs at least one rate/try to setup
1806 * the rate scenario.
1808 bf->bf_state.bfs_rc[0].rix = rix;
1809 bf->bf_state.bfs_rc[0].tries = try0;
1810 bf->bf_state.bfs_rc[0].ratecode = txrate;
1812 /* Store the decided rate index values away */
1813 bf->bf_state.bfs_pktlen = pktlen;
1814 bf->bf_state.bfs_hdrlen = hdrlen;
1815 bf->bf_state.bfs_atype = atype;
1816 bf->bf_state.bfs_txpower = ieee80211_get_node_txpower(ni);
1817 bf->bf_state.bfs_txrate0 = txrate;
1818 bf->bf_state.bfs_try0 = try0;
1819 bf->bf_state.bfs_keyix = keyix;
1820 bf->bf_state.bfs_txantenna = sc->sc_txantenna;
1821 bf->bf_state.bfs_txflags = flags;
1822 bf->bf_state.bfs_shpream = shortPreamble;
1824 /* XXX this should be done in ath_tx_setrate() */
1825 bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */
1826 bf->bf_state.bfs_ctsrate = 0; /* calculated later */
1827 bf->bf_state.bfs_ctsduration = 0;
1828 bf->bf_state.bfs_ismrr = ismrr;
1834 * Queue a frame to the hardware or software queue.
1836 * This can be called by the net80211 code.
1838 * XXX what about locking? Or, push the seqno assign into the
1839 * XXX aggregate scheduler so its serialised?
1841 * XXX When sending management frames via ath_raw_xmit(),
1842 * should CLRDMASK be set unconditionally?
1845 ath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni,
1846 struct ath_buf *bf, struct mbuf *m0)
1848 struct ieee80211vap *vap = ni->ni_vap;
1849 struct ath_vap *avp = ATH_VAP(vap);
1853 struct ath_txq *txq;
1855 const struct ieee80211_frame *wh;
1856 int is_ampdu, is_ampdu_tx, is_ampdu_pending;
1857 ieee80211_seq seqno;
1858 uint8_t type, subtype;
1861 ATH_TX_LOCK_ASSERT(sc);
1864 * Determine the target hardware queue.
1866 * For multicast frames, the txq gets overridden appropriately
1867 * depending upon the state of PS.
1869 * For any other frame, we do a TID/QoS lookup inside the frame
1870 * to see what the TID should be. If it's a non-QoS frame, the
1871 * AC and TID are overridden. The TID/TXQ code assumes the
1872 * TID is on a predictable hardware TXQ, so we don't support
1873 * having a node TID queued to multiple hardware TXQs.
1874 * This may change in the future but would require some locking
1877 pri = ath_tx_getac(sc, m0);
1878 tid = ath_tx_gettid(sc, m0);
1880 txq = sc->sc_ac2q[pri];
1881 wh = mtod(m0, struct ieee80211_frame *);
1882 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1883 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1884 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1887 * Enforce how deep the multicast queue can grow.
1889 * XXX duplicated in ath_raw_xmit().
1891 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1892 if (sc->sc_cabq->axq_depth + sc->sc_cabq->fifo.axq_depth
1893 > sc->sc_txq_mcastq_maxdepth) {
1894 sc->sc_stats.ast_tx_mcastq_overflow++;
1901 * Enforce how deep the unicast queue can grow.
1903 * If the node is in power save then we don't want
1904 * the software queue to grow too deep, or a node may
1905 * end up consuming all of the ath_buf entries.
1907 * For now, only do this for DATA frames.
1909 * We will want to cap how many management/control
1910 * frames get punted to the software queue so it doesn't
1911 * fill up. But the correct solution isn't yet obvious.
1912 * In any case, this check should at least let frames pass
1913 * that we are direct-dispatching.
1915 * XXX TODO: duplicate this to the raw xmit path!
1917 if (type == IEEE80211_FC0_TYPE_DATA &&
1918 ATH_NODE(ni)->an_is_powersave &&
1919 ATH_NODE(ni)->an_swq_depth >
1920 sc->sc_txq_node_psq_maxdepth) {
1921 sc->sc_stats.ast_tx_node_psq_overflow++;
1927 is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid);
1928 is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid);
1929 is_ampdu = is_ampdu_tx | is_ampdu_pending;
1931 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n",
1932 __func__, tid, pri, is_ampdu);
1934 /* Set local packet state, used to queue packets to hardware */
1935 bf->bf_state.bfs_tid = tid;
1936 bf->bf_state.bfs_tx_queue = txq->axq_qnum;
1937 bf->bf_state.bfs_pri = pri;
1941 * When servicing one or more stations in power-save mode
1942 * (or) if there is some mcast data waiting on the mcast
1943 * queue (to prevent out of order delivery) multicast frames
1944 * must be bufferd until after the beacon.
1946 * TODO: we should lock the mcastq before we check the length.
1948 if (sc->sc_cabq_enable && ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) {
1949 txq = &avp->av_mcastq;
1951 * Mark the frame as eventually belonging on the CAB
1952 * queue, so the descriptor setup functions will
1953 * correctly initialise the descriptor 'qcuId' field.
1955 bf->bf_state.bfs_tx_queue = sc->sc_cabq->axq_qnum;
1959 /* Do the generic frame setup */
1960 /* XXX should just bzero the bf_state? */
1961 bf->bf_state.bfs_dobaw = 0;
1963 /* A-MPDU TX? Manually set sequence number */
1965 * Don't do it whilst pending; the net80211 layer still
1970 * Always call; this function will
1971 * handle making sure that null data frames
1972 * don't get a sequence number from the current
1973 * TID and thus mess with the BAW.
1975 seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0);
1978 * Don't add QoS NULL frames to the BAW.
1980 if (IEEE80211_QOS_HAS_SEQ(wh) &&
1981 subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) {
1982 bf->bf_state.bfs_dobaw = 1;
1987 * If needed, the sequence number has been assigned.
1988 * Squirrel it away somewhere easy to get to.
1990 bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT;
1992 /* Is ampdu pending? fetch the seqno and print it out */
1993 if (is_ampdu_pending)
1994 DPRINTF(sc, ATH_DEBUG_SW_TX,
1995 "%s: tid %d: ampdu pending, seqno %d\n",
1996 __func__, tid, M_SEQNO_GET(m0));
1998 /* This also sets up the DMA map */
1999 r = ath_tx_normal_setup(sc, ni, bf, m0, txq);
2004 /* At this point m0 could have changed! */
2009 * If it's a multicast frame, do a direct-dispatch to the
2010 * destination hardware queue. Don't bother software
2014 * If it's a BAR frame, do a direct dispatch to the
2015 * destination hardware queue. Don't bother software
2016 * queuing it, as the TID will now be paused.
2017 * Sending a BAR frame can occur from the net80211 txa timer
2018 * (ie, retries) or from the ath txtask (completion call.)
2019 * It queues directly to hardware because the TID is paused
2020 * at this point (and won't be unpaused until the BAR has
2021 * either been TXed successfully or max retries has been
2025 * Until things are better debugged - if this node is asleep
2026 * and we're sending it a non-BAR frame, direct dispatch it.
2027 * Why? Because we need to figure out what's actually being
2028 * sent - eg, during reassociation/reauthentication after
2029 * the node (last) disappeared whilst asleep, the driver should
2030 * have unpaused/unsleep'ed the node. So until that is
2031 * sorted out, use this workaround.
2033 if (txq == &avp->av_mcastq) {
2034 DPRINTF(sc, ATH_DEBUG_SW_TX,
2035 "%s: bf=%p: mcastq: TX'ing\n", __func__, bf);
2036 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2037 ath_tx_xmit_normal(sc, txq, bf);
2038 } else if (ath_tx_should_swq_frame(sc, ATH_NODE(ni), m0,
2040 ath_tx_swq(sc, ni, txq, queue_to_head, bf);
2042 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2043 ath_tx_xmit_normal(sc, txq, bf);
2047 * For now, since there's no software queue,
2048 * direct-dispatch to the hardware.
2050 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2052 * Update the current leak count if
2053 * we're leaking frames; and set the
2054 * MORE flag as appropriate.
2056 ath_tx_leak_count_update(sc, tid, bf);
2057 ath_tx_xmit_normal(sc, txq, bf);
2064 ath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni,
2065 struct ath_buf *bf, struct mbuf *m0,
2066 const struct ieee80211_bpf_params *params)
2068 struct ifnet *ifp = sc->sc_ifp;
2069 struct ieee80211com *ic = ifp->if_l2com;
2070 struct ath_hal *ah = sc->sc_ah;
2071 struct ieee80211vap *vap = ni->ni_vap;
2072 int error, ismcast, ismrr;
2073 int keyix, hdrlen, pktlen, try0, txantenna;
2074 u_int8_t rix, txrate;
2075 struct ieee80211_frame *wh;
2078 const HAL_RATE_TABLE *rt;
2079 struct ath_desc *ds;
2083 uint8_t type, subtype;
2086 ATH_TX_LOCK_ASSERT(sc);
2088 wh = mtod(m0, struct ieee80211_frame *);
2089 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
2090 hdrlen = ieee80211_anyhdrsize(wh);
2092 * Packet length must not include any
2093 * pad bytes; deduct them here.
2095 /* XXX honor IEEE80211_BPF_DATAPAD */
2096 pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN;
2098 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
2099 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
2101 ATH_KTR(sc, ATH_KTR_TX, 2,
2102 "ath_tx_raw_start: ni=%p, bf=%p, raw", ni, bf);
2104 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n",
2107 pri = params->ibp_pri & 3;
2108 /* Override pri if the frame isn't a QoS one */
2109 if (! IEEE80211_QOS_HAS_SEQ(wh))
2110 pri = ath_tx_getac(sc, m0);
2112 /* XXX If it's an ADDBA, override the correct queue */
2113 do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid);
2115 /* Map ADDBA to the correct priority */
2118 DPRINTF(sc, ATH_DEBUG_XMIT,
2119 "%s: overriding tid %d pri %d -> %d\n",
2120 __func__, o_tid, pri, TID_TO_WME_AC(o_tid));
2122 pri = TID_TO_WME_AC(o_tid);
2125 /* Handle encryption twiddling if needed */
2126 if (! ath_tx_tag_crypto(sc, ni,
2127 m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0,
2128 &hdrlen, &pktlen, &keyix)) {
2132 /* packet header may have moved, reset our local pointer */
2133 wh = mtod(m0, struct ieee80211_frame *);
2135 /* Do the generic frame setup */
2136 /* XXX should just bzero the bf_state? */
2137 bf->bf_state.bfs_dobaw = 0;
2139 error = ath_tx_dmasetup(sc, bf, m0);
2142 m0 = bf->bf_m; /* NB: may have changed */
2143 wh = mtod(m0, struct ieee80211_frame *);
2144 bf->bf_node = ni; /* NB: held reference */
2146 /* Always enable CLRDMASK for raw frames for now.. */
2147 flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */
2148 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
2149 if (params->ibp_flags & IEEE80211_BPF_RTS)
2150 flags |= HAL_TXDESC_RTSENA;
2151 else if (params->ibp_flags & IEEE80211_BPF_CTS) {
2152 /* XXX assume 11g/11n protection? */
2153 bf->bf_state.bfs_doprot = 1;
2154 flags |= HAL_TXDESC_CTSENA;
2156 /* XXX leave ismcast to injector? */
2157 if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast)
2158 flags |= HAL_TXDESC_NOACK;
2160 rt = sc->sc_currates;
2161 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
2162 rix = ath_tx_findrix(sc, params->ibp_rate0);
2163 txrate = rt->info[rix].rateCode;
2164 if (params->ibp_flags & IEEE80211_BPF_SHORTPRE)
2165 txrate |= rt->info[rix].shortPreamble;
2167 try0 = params->ibp_try0;
2168 ismrr = (params->ibp_try1 != 0);
2169 txantenna = params->ibp_pri >> 2;
2170 if (txantenna == 0) /* XXX? */
2171 txantenna = sc->sc_txantenna;
2174 * Since ctsrate is fixed, store it away for later
2175 * use when the descriptor fields are being set.
2177 if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA))
2178 bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate;
2181 * NB: we mark all packets as type PSPOLL so the h/w won't
2182 * set the sequence number, duration, etc.
2184 atype = HAL_PKT_TYPE_PSPOLL;
2186 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT))
2187 ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len,
2188 sc->sc_hwmap[rix].ieeerate, -1);
2190 if (ieee80211_radiotap_active_vap(vap)) {
2191 u_int64_t tsf = ath_hal_gettsf64(ah);
2193 sc->sc_tx_th.wt_tsf = htole64(tsf);
2194 sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags;
2195 if (wh->i_fc[1] & IEEE80211_FC1_WEP)
2196 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
2197 if (m0->m_flags & M_FRAG)
2198 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG;
2199 sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate;
2200 sc->sc_tx_th.wt_txpower = MIN(params->ibp_power,
2201 ieee80211_get_node_txpower(ni));
2202 sc->sc_tx_th.wt_antenna = sc->sc_txantenna;
2204 ieee80211_radiotap_tx(vap, m0);
2208 * Formulate first tx descriptor with tx controls.
2211 /* XXX check return value? */
2213 /* Store the decided rate index values away */
2214 bf->bf_state.bfs_pktlen = pktlen;
2215 bf->bf_state.bfs_hdrlen = hdrlen;
2216 bf->bf_state.bfs_atype = atype;
2217 bf->bf_state.bfs_txpower = MIN(params->ibp_power,
2218 ieee80211_get_node_txpower(ni));
2219 bf->bf_state.bfs_txrate0 = txrate;
2220 bf->bf_state.bfs_try0 = try0;
2221 bf->bf_state.bfs_keyix = keyix;
2222 bf->bf_state.bfs_txantenna = txantenna;
2223 bf->bf_state.bfs_txflags = flags;
2224 bf->bf_state.bfs_shpream =
2225 !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE);
2227 /* Set local packet state, used to queue packets to hardware */
2228 bf->bf_state.bfs_tid = WME_AC_TO_TID(pri);
2229 bf->bf_state.bfs_tx_queue = sc->sc_ac2q[pri]->axq_qnum;
2230 bf->bf_state.bfs_pri = pri;
2232 /* XXX this should be done in ath_tx_setrate() */
2233 bf->bf_state.bfs_ctsrate = 0;
2234 bf->bf_state.bfs_ctsduration = 0;
2235 bf->bf_state.bfs_ismrr = ismrr;
2237 /* Blank the legacy rate array */
2238 bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
2240 bf->bf_state.bfs_rc[0].rix =
2241 ath_tx_findrix(sc, params->ibp_rate0);
2242 bf->bf_state.bfs_rc[0].tries = try0;
2243 bf->bf_state.bfs_rc[0].ratecode = txrate;
2248 rix = ath_tx_findrix(sc, params->ibp_rate1);
2249 bf->bf_state.bfs_rc[1].rix = rix;
2250 bf->bf_state.bfs_rc[1].tries = params->ibp_try1;
2252 rix = ath_tx_findrix(sc, params->ibp_rate2);
2253 bf->bf_state.bfs_rc[2].rix = rix;
2254 bf->bf_state.bfs_rc[2].tries = params->ibp_try2;
2256 rix = ath_tx_findrix(sc, params->ibp_rate3);
2257 bf->bf_state.bfs_rc[3].rix = rix;
2258 bf->bf_state.bfs_rc[3].tries = params->ibp_try3;
2261 * All the required rate control decisions have been made;
2262 * fill in the rc flags.
2264 ath_tx_rate_fill_rcflags(sc, bf);
2266 /* NB: no buffered multicast in power save support */
2269 * If we're overiding the ADDBA destination, dump directly
2270 * into the hardware queue, right after any pending
2271 * frames to that node are.
2273 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n",
2274 __func__, do_override);
2278 * Put addba frames in the right place in the right TID/HWQ.
2281 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2283 * XXX if it's addba frames, should we be leaking
2284 * them out via the frame leak method?
2285 * XXX for now let's not risk it; but we may wish
2286 * to investigate this later.
2288 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2289 } else if (ath_tx_should_swq_frame(sc, ATH_NODE(ni), m0,
2291 /* Queue to software queue */
2292 ath_tx_swq(sc, ni, sc->sc_ac2q[pri], queue_to_head, bf);
2294 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2295 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2298 /* Direct-dispatch to the hardware */
2299 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2301 * Update the current leak count if
2302 * we're leaking frames; and set the
2303 * MORE flag as appropriate.
2305 ath_tx_leak_count_update(sc, tid, bf);
2306 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2314 * This can be called by net80211.
2317 ath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
2318 const struct ieee80211_bpf_params *params)
2320 struct ieee80211com *ic = ni->ni_ic;
2321 struct ifnet *ifp = ic->ic_ifp;
2322 struct ath_softc *sc = ifp->if_softc;
2324 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
2328 if (sc->sc_inreset_cnt > 0) {
2329 DPRINTF(sc, ATH_DEBUG_XMIT,
2330 "%s: sc_inreset_cnt > 0; bailing\n", __func__);
2335 sc->sc_txstart_cnt++;
2340 if ((ifp->if_flags & IFF_RUNNING) == 0 || sc->sc_invalid) {
2341 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__,
2342 (ifp->if_flags & IFF_RUNNING) == 0 ?
2343 "!running" : "invalid");
2350 * Enforce how deep the multicast queue can grow.
2352 * XXX duplicated in ath_tx_start().
2354 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2355 if (sc->sc_cabq->axq_depth + sc->sc_cabq->fifo.axq_depth
2356 > sc->sc_txq_mcastq_maxdepth) {
2357 sc->sc_stats.ast_tx_mcastq_overflow++;
2368 * Grab a TX buffer and associated resources.
2370 bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT);
2372 sc->sc_stats.ast_tx_nobuf++;
2377 ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: m=%p, params=%p, bf=%p\n",
2380 if (params == NULL) {
2382 * Legacy path; interpret frame contents to decide
2383 * precisely how to send the frame.
2385 if (ath_tx_start(sc, ni, bf, m)) {
2386 error = EIO; /* XXX */
2391 * Caller supplied explicit parameters to use in
2392 * sending the frame.
2394 if (ath_tx_raw_start(sc, ni, bf, m, params)) {
2395 error = EIO; /* XXX */
2399 sc->sc_wd_timer = 5;
2401 sc->sc_stats.ast_tx_raw++;
2404 * Update the TIM - if there's anything queued to the
2405 * software queue and power save is enabled, we should
2408 ath_tx_update_tim(sc, ni, 1);
2413 sc->sc_txstart_cnt--;
2418 ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: bad2: m=%p, params=%p, "
2424 ath_returnbuf_head(sc, bf);
2425 ATH_TXBUF_UNLOCK(sc);
2431 sc->sc_txstart_cnt--;
2434 ATH_KTR(sc, ATH_KTR_TX, 2, "ath_raw_xmit: bad0: m=%p, params=%p",
2437 sc->sc_stats.ast_tx_raw_fail++;
2438 ieee80211_free_node(ni);
2443 /* Some helper functions */
2446 * ADDBA (and potentially others) need to be placed in the same
2447 * hardware queue as the TID/node it's relating to. This is so
2448 * it goes out after any pending non-aggregate frames to the
2451 * If this isn't done, the ADDBA can go out before the frames
2452 * queued in hardware. Even though these frames have a sequence
2453 * number -earlier- than the ADDBA can be transmitted (but
2454 * no frames whose sequence numbers are after the ADDBA should
2455 * be!) they'll arrive after the ADDBA - and the receiving end
2456 * will simply drop them as being out of the BAW.
2458 * The frames can't be appended to the TID software queue - it'll
2459 * never be sent out. So these frames have to be directly
2460 * dispatched to the hardware, rather than queued in software.
2461 * So if this function returns true, the TXQ has to be
2462 * overridden and it has to be directly dispatched.
2464 * It's a dirty hack, but someone's gotta do it.
2468 * XXX doesn't belong here!
2471 ieee80211_is_action(struct ieee80211_frame *wh)
2473 /* Type: Management frame? */
2474 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) !=
2475 IEEE80211_FC0_TYPE_MGT)
2478 /* Subtype: Action frame? */
2479 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) !=
2480 IEEE80211_FC0_SUBTYPE_ACTION)
2486 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
2488 * Return an alternate TID for ADDBA request frames.
2490 * Yes, this likely should be done in the net80211 layer.
2493 ath_tx_action_frame_override_queue(struct ath_softc *sc,
2494 struct ieee80211_node *ni,
2495 struct mbuf *m0, int *tid)
2497 struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *);
2498 struct ieee80211_action_ba_addbarequest *ia;
2500 uint16_t baparamset;
2502 /* Not action frame? Bail */
2503 if (! ieee80211_is_action(wh))
2506 /* XXX Not needed for frames we send? */
2508 /* Correct length? */
2509 if (! ieee80211_parse_action(ni, m))
2513 /* Extract out action frame */
2514 frm = (u_int8_t *)&wh[1];
2515 ia = (struct ieee80211_action_ba_addbarequest *) frm;
2517 /* Not ADDBA? Bail */
2518 if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA)
2520 if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST)
2523 /* Extract TID, return it */
2524 baparamset = le16toh(ia->rq_baparamset);
2525 *tid = (int) MS(baparamset, IEEE80211_BAPS_TID);
2531 /* Per-node software queue operations */
2534 * Add the current packet to the given BAW.
2535 * It is assumed that the current packet
2537 * + fits inside the BAW;
2538 * + already has had a sequence number allocated.
2540 * Since the BAW status may be modified by both the ath task and
2541 * the net80211/ifnet contexts, the TID must be locked.
2544 ath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an,
2545 struct ath_tid *tid, struct ath_buf *bf)
2548 struct ieee80211_tx_ampdu *tap;
2550 ATH_TX_LOCK_ASSERT(sc);
2552 if (bf->bf_state.bfs_isretried)
2555 tap = ath_tx_get_tx_tid(an, tid->tid);
2557 if (! bf->bf_state.bfs_dobaw) {
2558 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2559 "%s: dobaw=0, seqno=%d, window %d:%d\n",
2560 __func__, SEQNO(bf->bf_state.bfs_seqno),
2561 tap->txa_start, tap->txa_wnd);
2564 if (bf->bf_state.bfs_addedbaw)
2565 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2566 "%s: re-added? tid=%d, seqno %d; window %d:%d; "
2567 "baw head=%d tail=%d\n",
2568 __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2569 tap->txa_start, tap->txa_wnd, tid->baw_head,
2573 * Verify that the given sequence number is not outside of the
2574 * BAW. Complain loudly if that's the case.
2576 if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd,
2577 SEQNO(bf->bf_state.bfs_seqno))) {
2578 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2579 "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; "
2580 "baw head=%d tail=%d\n",
2581 __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2582 tap->txa_start, tap->txa_wnd, tid->baw_head,
2587 * ni->ni_txseqs[] is the currently allocated seqno.
2588 * the txa state contains the current baw start.
2590 index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno));
2591 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2592 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2593 "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d "
2594 "baw head=%d tail=%d\n",
2595 __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2596 tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head,
2601 assert(tid->tx_buf[cindex] == NULL);
2603 if (tid->tx_buf[cindex] != NULL) {
2604 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2605 "%s: ba packet dup (index=%d, cindex=%d, "
2606 "head=%d, tail=%d)\n",
2607 __func__, index, cindex, tid->baw_head, tid->baw_tail);
2608 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2609 "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n",
2611 tid->tx_buf[cindex],
2612 SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno),
2614 SEQNO(bf->bf_state.bfs_seqno)
2617 tid->tx_buf[cindex] = bf;
2619 if (index >= ((tid->baw_tail - tid->baw_head) &
2620 (ATH_TID_MAX_BUFS - 1))) {
2621 tid->baw_tail = cindex;
2622 INCR(tid->baw_tail, ATH_TID_MAX_BUFS);
2627 * Flip the BAW buffer entry over from the existing one to the new one.
2629 * When software retransmitting a (sub-)frame, it is entirely possible that
2630 * the frame ath_buf is marked as BUSY and can't be immediately reused.
2631 * In that instance the buffer is cloned and the new buffer is used for
2632 * retransmit. We thus need to update the ath_buf slot in the BAW buf
2633 * tracking array to maintain consistency.
2636 ath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an,
2637 struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf)
2640 struct ieee80211_tx_ampdu *tap;
2641 int seqno = SEQNO(old_bf->bf_state.bfs_seqno);
2643 ATH_TX_LOCK_ASSERT(sc);
2645 tap = ath_tx_get_tx_tid(an, tid->tid);
2646 index = ATH_BA_INDEX(tap->txa_start, seqno);
2647 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2650 * Just warn for now; if it happens then we should find out
2651 * about it. It's highly likely the aggregation session will
2654 if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) {
2655 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2656 "%s: retransmitted buffer"
2657 " has mismatching seqno's, BA session may hang.\n",
2659 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2660 "%s: old seqno=%d, new_seqno=%d\n", __func__,
2661 old_bf->bf_state.bfs_seqno, new_bf->bf_state.bfs_seqno);
2664 if (tid->tx_buf[cindex] != old_bf) {
2665 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2666 "%s: ath_buf pointer incorrect; "
2667 " has m BA session may hang.\n", __func__);
2668 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2669 "%s: old bf=%p, new bf=%p\n", __func__, old_bf, new_bf);
2672 tid->tx_buf[cindex] = new_bf;
2676 * seq_start - left edge of BAW
2677 * seq_next - current/next sequence number to allocate
2679 * Since the BAW status may be modified by both the ath task and
2680 * the net80211/ifnet contexts, the TID must be locked.
2683 ath_tx_update_baw(struct ath_softc *sc, struct ath_node *an,
2684 struct ath_tid *tid, const struct ath_buf *bf)
2687 struct ieee80211_tx_ampdu *tap;
2688 int seqno = SEQNO(bf->bf_state.bfs_seqno);
2690 ATH_TX_LOCK_ASSERT(sc);
2692 tap = ath_tx_get_tx_tid(an, tid->tid);
2693 index = ATH_BA_INDEX(tap->txa_start, seqno);
2694 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2696 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2697 "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, "
2698 "baw head=%d, tail=%d\n",
2699 __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index,
2700 cindex, tid->baw_head, tid->baw_tail);
2703 * If this occurs then we have a big problem - something else
2704 * has slid tap->txa_start along without updating the BAW
2705 * tracking start/end pointers. Thus the TX BAW state is now
2706 * completely busted.
2708 * But for now, since I haven't yet fixed TDMA and buffer cloning,
2709 * it's quite possible that a cloned buffer is making its way
2710 * here and causing it to fire off. Disable TDMA for now.
2712 if (tid->tx_buf[cindex] != bf) {
2713 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2714 "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n",
2715 __func__, bf, SEQNO(bf->bf_state.bfs_seqno),
2716 tid->tx_buf[cindex],
2717 (tid->tx_buf[cindex] != NULL) ?
2718 SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno) : -1);
2721 tid->tx_buf[cindex] = NULL;
2723 while (tid->baw_head != tid->baw_tail &&
2724 !tid->tx_buf[tid->baw_head]) {
2725 INCR(tap->txa_start, IEEE80211_SEQ_RANGE);
2726 INCR(tid->baw_head, ATH_TID_MAX_BUFS);
2728 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2729 "%s: baw is now %d:%d, baw head=%d\n",
2730 __func__, tap->txa_start, tap->txa_wnd, tid->baw_head);
2734 ath_tx_leak_count_update(struct ath_softc *sc, struct ath_tid *tid,
2737 struct ieee80211_frame *wh;
2739 ATH_TX_LOCK_ASSERT(sc);
2741 if (tid->an->an_leak_count > 0) {
2742 wh = mtod(bf->bf_m, struct ieee80211_frame *);
2745 * Update MORE based on the software/net80211 queue states.
2747 if ((tid->an->an_stack_psq > 0)
2748 || (tid->an->an_swq_depth > 0))
2749 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
2751 wh->i_fc[1] &= ~IEEE80211_FC1_MORE_DATA;
2753 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
2754 "%s: %6D: leak count = %d, psq=%d, swq=%d, MORE=%d\n",
2756 tid->an->an_node.ni_macaddr,
2758 tid->an->an_leak_count,
2759 tid->an->an_stack_psq,
2760 tid->an->an_swq_depth,
2761 !! (wh->i_fc[1] & IEEE80211_FC1_MORE_DATA));
2764 * Re-sync the underlying buffer.
2766 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap,
2767 BUS_DMASYNC_PREWRITE);
2769 tid->an->an_leak_count --;
2774 ath_tx_tid_can_tx_or_sched(struct ath_softc *sc, struct ath_tid *tid)
2777 ATH_TX_LOCK_ASSERT(sc);
2779 if (tid->an->an_leak_count > 0) {
2788 * Mark the current node/TID as ready to TX.
2790 * This is done to make it easy for the software scheduler to
2791 * find which nodes have data to send.
2793 * The TXQ lock must be held.
2796 ath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid)
2798 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
2800 ATH_TX_LOCK_ASSERT(sc);
2803 * If we are leaking out a frame to this destination
2804 * for PS-POLL, ensure that we allow scheduling to
2807 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
2808 return; /* paused, can't schedule yet */
2811 return; /* already scheduled */
2817 * If this is a sleeping node we're leaking to, given
2818 * it a higher priority. This is so bad for QoS it hurts.
2820 if (tid->an->an_leak_count) {
2821 TAILQ_INSERT_HEAD(&txq->axq_tidq, tid, axq_qelem);
2823 TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem);
2828 * We can't do the above - it'll confuse the TXQ software
2829 * scheduler which will keep checking the _head_ TID
2830 * in the list to see if it has traffic. If we queue
2831 * a TID to the head of the list and it doesn't transmit,
2832 * we'll check it again.
2834 * So, get the rest of this leaking frames support working
2835 * and reliable first and _then_ optimise it so they're
2836 * pushed out in front of any other pending software
2839 TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem);
2843 * Mark the current node as no longer needing to be polled for
2846 * The TXQ lock must be held.
2849 ath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid)
2851 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
2853 ATH_TX_LOCK_ASSERT(sc);
2855 if (tid->sched == 0)
2859 TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem);
2863 * Assign a sequence number manually to the given frame.
2865 * This should only be called for A-MPDU TX frames.
2867 static ieee80211_seq
2868 ath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni,
2869 struct ath_buf *bf, struct mbuf *m0)
2871 struct ieee80211_frame *wh;
2873 ieee80211_seq seqno;
2877 wh = mtod(m0, struct ieee80211_frame *);
2878 pri = M_WME_GETAC(m0); /* honor classification */
2879 tid = WME_AC_TO_TID(pri);
2880 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n",
2881 __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh));
2883 /* XXX Is it a control frame? Ignore */
2885 /* Does the packet require a sequence number? */
2886 if (! IEEE80211_QOS_HAS_SEQ(wh))
2889 ATH_TX_LOCK_ASSERT(sc);
2892 * Is it a QOS NULL Data frame? Give it a sequence number from
2893 * the default TID (IEEE80211_NONQOS_TID.)
2895 * The RX path of everything I've looked at doesn't include the NULL
2896 * data frame sequence number in the aggregation state updates, so
2897 * assigning it a sequence number there will cause a BAW hole on the
2900 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
2901 if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) {
2902 /* XXX no locking for this TID? This is a bit of a problem. */
2903 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID];
2904 INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE);
2906 /* Manually assign sequence number */
2907 seqno = ni->ni_txseqs[tid];
2908 INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE);
2910 *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
2911 M_SEQNO_SET(m0, seqno);
2913 /* Return so caller can do something with it if needed */
2914 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno);
2919 * Attempt to direct dispatch an aggregate frame to hardware.
2920 * If the frame is out of BAW, queue.
2921 * Otherwise, schedule it as a single frame.
2924 ath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an,
2925 struct ath_txq *txq, struct ath_buf *bf)
2927 struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid];
2928 struct ieee80211_tx_ampdu *tap;
2930 ATH_TX_LOCK_ASSERT(sc);
2932 tap = ath_tx_get_tx_tid(an, tid->tid);
2935 if (! ath_tx_tid_can_tx_or_sched(sc, tid)) {
2936 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
2937 /* XXX don't sched - we're paused! */
2941 /* outside baw? queue */
2942 if (bf->bf_state.bfs_dobaw &&
2943 (! BAW_WITHIN(tap->txa_start, tap->txa_wnd,
2944 SEQNO(bf->bf_state.bfs_seqno)))) {
2945 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
2946 ath_tx_tid_sched(sc, tid);
2951 * This is a temporary check and should be removed once
2952 * all the relevant code paths have been fixed.
2954 * During aggregate retries, it's possible that the head
2955 * frame will fail (which has the bfs_aggr and bfs_nframes
2956 * fields set for said aggregate) and will be retried as
2957 * a single frame. In this instance, the values should
2958 * be reset or the completion code will get upset with you.
2960 if (bf->bf_state.bfs_aggr != 0 || bf->bf_state.bfs_nframes > 1) {
2961 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
2962 "%s: bfs_aggr=%d, bfs_nframes=%d\n", __func__,
2963 bf->bf_state.bfs_aggr, bf->bf_state.bfs_nframes);
2964 bf->bf_state.bfs_aggr = 0;
2965 bf->bf_state.bfs_nframes = 1;
2968 /* Update CLRDMASK just before this frame is queued */
2969 ath_tx_update_clrdmask(sc, tid, bf);
2971 /* Direct dispatch to hardware */
2972 ath_tx_do_ratelookup(sc, bf);
2973 ath_tx_calc_duration(sc, bf);
2974 ath_tx_calc_protection(sc, bf);
2975 ath_tx_set_rtscts(sc, bf);
2976 ath_tx_rate_fill_rcflags(sc, bf);
2977 ath_tx_setds(sc, bf);
2980 sc->sc_aggr_stats.aggr_low_hwq_single_pkt++;
2982 /* Track per-TID hardware queue depth correctly */
2986 if (bf->bf_state.bfs_dobaw) {
2987 ath_tx_addto_baw(sc, an, tid, bf);
2988 bf->bf_state.bfs_addedbaw = 1;
2991 /* Set completion handler, multi-frame aggregate or not */
2992 bf->bf_comp = ath_tx_aggr_comp;
2995 * Update the current leak count if
2996 * we're leaking frames; and set the
2997 * MORE flag as appropriate.
2999 ath_tx_leak_count_update(sc, tid, bf);
3001 /* Hand off to hardware */
3002 ath_tx_handoff(sc, txq, bf);
3006 * Attempt to send the packet.
3007 * If the queue isn't busy, direct-dispatch.
3008 * If the queue is busy enough, queue the given packet on the
3009 * relevant software queue.
3012 ath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni,
3013 struct ath_txq *txq, int queue_to_head, struct ath_buf *bf)
3015 struct ath_node *an = ATH_NODE(ni);
3016 struct ieee80211_frame *wh;
3017 struct ath_tid *atid;
3019 struct mbuf *m0 = bf->bf_m;
3021 ATH_TX_LOCK_ASSERT(sc);
3023 /* Fetch the TID - non-QoS frames get assigned to TID 16 */
3024 wh = mtod(m0, struct ieee80211_frame *);
3025 pri = ath_tx_getac(sc, m0);
3026 tid = ath_tx_gettid(sc, m0);
3027 atid = &an->an_tid[tid];
3029 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n",
3030 __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh));
3032 /* Set local packet state, used to queue packets to hardware */
3033 /* XXX potentially duplicate info, re-check */
3034 bf->bf_state.bfs_tid = tid;
3035 bf->bf_state.bfs_tx_queue = txq->axq_qnum;
3036 bf->bf_state.bfs_pri = pri;
3039 * If the hardware queue isn't busy, queue it directly.
3040 * If the hardware queue is busy, queue it.
3041 * If the TID is paused or the traffic it outside BAW, software
3044 * If the node is in power-save and we're leaking a frame,
3045 * leak a single frame.
3047 if (! ath_tx_tid_can_tx_or_sched(sc, atid)) {
3048 /* TID is paused, queue */
3049 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__);
3051 * If the caller requested that it be sent at a high
3052 * priority, queue it at the head of the list.
3055 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
3057 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3058 } else if (ath_tx_ampdu_pending(sc, an, tid)) {
3059 /* AMPDU pending; queue */
3060 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__);
3061 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3063 } else if (ath_tx_ampdu_running(sc, an, tid)) {
3064 /* AMPDU running, attempt direct dispatch if possible */
3067 * Always queue the frame to the tail of the list.
3069 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3072 * If the hardware queue isn't busy, direct dispatch
3073 * the head frame in the list. Don't schedule the
3074 * TID - let it build some more frames first?
3076 * When running A-MPDU, always just check the hardware
3077 * queue depth against the aggregate frame limit.
3078 * We don't want to burst a large number of single frames
3079 * out to the hardware; we want to aggressively hold back.
3081 * Otherwise, schedule the TID.
3083 /* XXX TXQ locking */
3084 if (txq->axq_depth + txq->fifo.axq_depth < sc->sc_hwq_limit_aggr) {
3085 bf = ATH_TID_FIRST(atid);
3086 ATH_TID_REMOVE(atid, bf, bf_list);
3089 * Ensure it's definitely treated as a non-AMPDU
3090 * frame - this information may have been left
3091 * over from a previous attempt.
3093 bf->bf_state.bfs_aggr = 0;
3094 bf->bf_state.bfs_nframes = 1;
3096 /* Queue to the hardware */
3097 ath_tx_xmit_aggr(sc, an, txq, bf);
3098 DPRINTF(sc, ATH_DEBUG_SW_TX,
3102 DPRINTF(sc, ATH_DEBUG_SW_TX,
3103 "%s: ampdu; swq'ing\n",
3106 ath_tx_tid_sched(sc, atid);
3109 * If we're not doing A-MPDU, be prepared to direct dispatch
3110 * up to both limits if possible. This particular corner
3111 * case may end up with packet starvation between aggregate
3112 * traffic and non-aggregate traffic: we wnat to ensure
3113 * that non-aggregate stations get a few frames queued to the
3114 * hardware before the aggregate station(s) get their chance.
3116 * So if you only ever see a couple of frames direct dispatched
3117 * to the hardware from a non-AMPDU client, check both here
3118 * and in the software queue dispatcher to ensure that those
3119 * non-AMPDU stations get a fair chance to transmit.
3121 /* XXX TXQ locking */
3122 } else if ((txq->axq_depth + txq->fifo.axq_depth < sc->sc_hwq_limit_nonaggr) &&
3123 (txq->axq_aggr_depth < sc->sc_hwq_limit_aggr)) {
3124 /* AMPDU not running, attempt direct dispatch */
3125 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__);
3126 /* See if clrdmask needs to be set */
3127 ath_tx_update_clrdmask(sc, atid, bf);
3130 * Update the current leak count if
3131 * we're leaking frames; and set the
3132 * MORE flag as appropriate.
3134 ath_tx_leak_count_update(sc, atid, bf);
3137 * Dispatch the frame.
3139 ath_tx_xmit_normal(sc, txq, bf);
3142 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__);
3143 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3144 ath_tx_tid_sched(sc, atid);
3149 * Only set the clrdmask bit if none of the nodes are currently
3152 * XXX TODO: go through all the callers and check to see
3153 * which are being called in the context of looping over all
3154 * TIDs (eg, if all tids are being paused, resumed, etc.)
3155 * That'll avoid O(n^2) complexity here.
3158 ath_tx_set_clrdmask(struct ath_softc *sc, struct ath_node *an)
3162 ATH_TX_LOCK_ASSERT(sc);
3164 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
3165 if (an->an_tid[i].isfiltered == 1)
3172 * Configure the per-TID node state.
3174 * This likely belongs in if_ath_node.c but I can't think of anywhere
3175 * else to put it just yet.
3177 * This sets up the SLISTs and the mutex as appropriate.
3180 ath_tx_tid_init(struct ath_softc *sc, struct ath_node *an)
3183 struct ath_tid *atid;
3185 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
3186 atid = &an->an_tid[i];
3188 /* XXX now with this bzer(), is the field 0'ing needed? */
3189 bzero(atid, sizeof(*atid));
3191 TAILQ_INIT(&atid->tid_q);
3192 TAILQ_INIT(&atid->filtq.tid_q);
3195 for (j = 0; j < ATH_TID_MAX_BUFS; j++)
3196 atid->tx_buf[j] = NULL;
3197 atid->baw_head = atid->baw_tail = 0;
3200 atid->hwq_depth = 0;
3201 atid->cleanup_inprogress = 0;
3202 if (i == IEEE80211_NONQOS_TID)
3203 atid->ac = ATH_NONQOS_TID_AC;
3205 atid->ac = TID_TO_WME_AC(i);
3207 an->clrdmask = 1; /* Always start by setting this bit */
3211 * Pause the current TID. This stops packets from being transmitted
3214 * Since this is also called from upper layers as well as the driver,
3215 * it will get the TID lock.
3218 ath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid)
3221 ATH_TX_LOCK_ASSERT(sc);
3223 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n",
3224 __func__, tid->paused);
3228 * Unpause the current TID, and schedule it if needed.
3231 ath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid)
3233 ATH_TX_LOCK_ASSERT(sc);
3236 * There's some odd places where ath_tx_tid_resume() is called
3237 * when it shouldn't be; this works around that particular issue
3238 * until it's actually resolved.
3240 if (tid->paused == 0) {
3241 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
3242 "%s: %6D: paused=0?\n", __func__,
3243 tid->an->an_node.ni_macaddr, ":");
3248 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n",
3249 __func__, tid->paused);
3255 * Override the clrdmask configuration for the next frame
3256 * from this TID, just to get the ball rolling.
3258 ath_tx_set_clrdmask(sc, tid->an);
3260 if (tid->axq_depth == 0)
3263 /* XXX isfiltered shouldn't ever be 0 at this point */
3264 if (tid->isfiltered == 1) {
3265 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: filtered?!\n",
3270 ath_tx_tid_sched(sc, tid);
3273 * Queue the software TX scheduler.
3275 ath_tx_swq_kick(sc);
3279 * Add the given ath_buf to the TID filtered frame list.
3280 * This requires the TID be filtered.
3283 ath_tx_tid_filt_addbuf(struct ath_softc *sc, struct ath_tid *tid,
3287 ATH_TX_LOCK_ASSERT(sc);
3289 if (!tid->isfiltered)
3290 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: not filtered?!\n",
3293 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: bf=%p\n", __func__, bf);
3295 /* Set the retry bit and bump the retry counter */
3296 ath_tx_set_retry(sc, bf);
3297 sc->sc_stats.ast_tx_swfiltered++;
3299 ATH_TID_FILT_INSERT_TAIL(tid, bf, bf_list);
3303 * Handle a completed filtered frame from the given TID.
3304 * This just enables/pauses the filtered frame state if required
3305 * and appends the filtered frame to the filtered queue.
3308 ath_tx_tid_filt_comp_buf(struct ath_softc *sc, struct ath_tid *tid,
3312 ATH_TX_LOCK_ASSERT(sc);
3314 if (! tid->isfiltered) {
3315 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: filter transition\n",
3317 tid->isfiltered = 1;
3318 ath_tx_tid_pause(sc, tid);
3321 /* Add the frame to the filter queue */
3322 ath_tx_tid_filt_addbuf(sc, tid, bf);
3326 * Complete the filtered frame TX completion.
3328 * If there are no more frames in the hardware queue, unpause/unfilter
3329 * the TID if applicable. Otherwise we will wait for a node PS transition
3333 ath_tx_tid_filt_comp_complete(struct ath_softc *sc, struct ath_tid *tid)
3337 ATH_TX_LOCK_ASSERT(sc);
3339 if (tid->hwq_depth != 0)
3342 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: hwq=0, transition back\n",
3344 tid->isfiltered = 0;
3345 /* XXX ath_tx_tid_resume() also calls ath_tx_set_clrdmask()! */
3346 ath_tx_set_clrdmask(sc, tid->an);
3348 /* XXX this is really quite inefficient */
3349 while ((bf = ATH_TID_FILT_LAST(tid, ath_bufhead_s)) != NULL) {
3350 ATH_TID_FILT_REMOVE(tid, bf, bf_list);
3351 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
3354 ath_tx_tid_resume(sc, tid);
3358 * Called when a single (aggregate or otherwise) frame is completed.
3360 * Returns 1 if the buffer could be added to the filtered list
3361 * (cloned or otherwise), 0 if the buffer couldn't be added to the
3362 * filtered list (failed clone; expired retry) and the caller should
3363 * free it and handle it like a failure (eg by sending a BAR.)
3366 ath_tx_tid_filt_comp_single(struct ath_softc *sc, struct ath_tid *tid,
3369 struct ath_buf *nbf;
3372 ATH_TX_LOCK_ASSERT(sc);
3375 * Don't allow a filtered frame to live forever.
3377 if (bf->bf_state.bfs_retries > SWMAX_RETRIES) {
3378 sc->sc_stats.ast_tx_swretrymax++;
3379 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3380 "%s: bf=%p, seqno=%d, exceeded retries\n",
3383 bf->bf_state.bfs_seqno);
3388 * A busy buffer can't be added to the retry list.
3389 * It needs to be cloned.
3391 if (bf->bf_flags & ATH_BUF_BUSY) {
3392 nbf = ath_tx_retry_clone(sc, tid->an, tid, bf);
3393 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3394 "%s: busy buffer clone: %p -> %p\n",
3401 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3402 "%s: busy buffer couldn't be cloned (%p)!\n",
3406 ath_tx_tid_filt_comp_buf(sc, tid, nbf);
3409 ath_tx_tid_filt_comp_complete(sc, tid);
3415 ath_tx_tid_filt_comp_aggr(struct ath_softc *sc, struct ath_tid *tid,
3416 struct ath_buf *bf_first, ath_bufhead *bf_q)
3418 struct ath_buf *bf, *bf_next, *nbf;
3420 ATH_TX_LOCK_ASSERT(sc);
3424 bf_next = bf->bf_next;
3425 bf->bf_next = NULL; /* Remove it from the aggr list */
3428 * Don't allow a filtered frame to live forever.
3430 if (bf->bf_state.bfs_retries > SWMAX_RETRIES) {
3431 sc->sc_stats.ast_tx_swretrymax++;
3432 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3433 "%s: bf=%p, seqno=%d, exceeded retries\n",
3436 bf->bf_state.bfs_seqno);
3437 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
3441 if (bf->bf_flags & ATH_BUF_BUSY) {
3442 nbf = ath_tx_retry_clone(sc, tid->an, tid, bf);
3443 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3444 "%s: busy buffer cloned: %p -> %p",
3451 * If the buffer couldn't be cloned, add it to bf_q;
3452 * the caller will free the buffer(s) as required.
3455 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3456 "%s: buffer couldn't be cloned! (%p)\n",
3458 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
3460 ath_tx_tid_filt_comp_buf(sc, tid, nbf);
3466 ath_tx_tid_filt_comp_complete(sc, tid);
3470 * Suspend the queue because we need to TX a BAR.
3473 ath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid)
3476 ATH_TX_LOCK_ASSERT(sc);
3478 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3479 "%s: tid=%d, bar_wait=%d, bar_tx=%d, called\n",
3485 /* We shouldn't be called when bar_tx is 1 */
3487 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3488 "%s: bar_tx is 1?!\n", __func__);
3491 /* If we've already been called, just be patient. */
3498 /* Only one pause, no matter how many frames fail */
3499 ath_tx_tid_pause(sc, tid);
3503 * We've finished with BAR handling - either we succeeded or
3504 * failed. Either way, unsuspend TX.
3507 ath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid)
3510 ATH_TX_LOCK_ASSERT(sc);
3512 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3513 "%s: %6D: TID=%d, called\n",
3515 tid->an->an_node.ni_macaddr,
3519 if (tid->bar_tx == 0 || tid->bar_wait == 0) {
3520 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3521 "%s: %6D: TID=%d, bar_tx=%d, bar_wait=%d: ?\n",
3522 __func__, tid->an->an_node.ni_macaddr, ":",
3523 tid->tid, tid->bar_tx, tid->bar_wait);
3526 tid->bar_tx = tid->bar_wait = 0;
3527 ath_tx_tid_resume(sc, tid);
3531 * Return whether we're ready to TX a BAR frame.
3533 * Requires the TID lock be held.
3536 ath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid)
3539 ATH_TX_LOCK_ASSERT(sc);
3541 if (tid->bar_wait == 0 || tid->hwq_depth > 0)
3544 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3545 "%s: %6D: TID=%d, bar ready\n",
3547 tid->an->an_node.ni_macaddr,
3555 * Check whether the current TID is ready to have a BAR
3556 * TXed and if so, do the TX.
3558 * Since the TID/TXQ lock can't be held during a call to
3559 * ieee80211_send_bar(), we have to do the dirty thing of unlocking it,
3560 * sending the BAR and locking it again.
3562 * Eventually, the code to send the BAR should be broken out
3563 * from this routine so the lock doesn't have to be reacquired
3564 * just to be immediately dropped by the caller.
3567 ath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid)
3569 struct ieee80211_tx_ampdu *tap;
3571 ATH_TX_LOCK_ASSERT(sc);
3573 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3574 "%s: %6D: TID=%d, called\n",
3576 tid->an->an_node.ni_macaddr,
3580 tap = ath_tx_get_tx_tid(tid->an, tid->tid);
3583 * This is an error condition!
3585 if (tid->bar_wait == 0 || tid->bar_tx == 1) {
3586 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3587 "%s: %6D: TID=%d, bar_tx=%d, bar_wait=%d: ?\n",
3588 __func__, tid->an->an_node.ni_macaddr, ":",
3589 tid->tid, tid->bar_tx, tid->bar_wait);
3593 /* Don't do anything if we still have pending frames */
3594 if (tid->hwq_depth > 0) {
3595 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3596 "%s: %6D: TID=%d, hwq_depth=%d, waiting\n",
3598 tid->an->an_node.ni_macaddr,
3605 /* We're now about to TX */
3609 * Override the clrdmask configuration for the next frame,
3610 * just to get the ball rolling.
3612 ath_tx_set_clrdmask(sc, tid->an);
3615 * Calculate new BAW left edge, now that all frames have either
3616 * succeeded or failed.
3618 * XXX verify this is _actually_ the valid value to begin at!
3620 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3621 "%s: %6D: TID=%d, new BAW left edge=%d\n",
3623 tid->an->an_node.ni_macaddr,
3628 /* Try sending the BAR frame */
3629 /* We can't hold the lock here! */
3632 if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) {
3633 /* Success? Now we wait for notification that it's done */
3638 /* Failure? For now, warn loudly and continue */
3640 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3641 "%s: %6D: TID=%d, failed to TX BAR, continue!\n",
3642 __func__, tid->an->an_node.ni_macaddr, ":",
3644 ath_tx_tid_bar_unsuspend(sc, tid);
3648 ath_tx_tid_drain_pkt(struct ath_softc *sc, struct ath_node *an,
3649 struct ath_tid *tid, ath_bufhead *bf_cq, struct ath_buf *bf)
3652 ATH_TX_LOCK_ASSERT(sc);
3655 * If the current TID is running AMPDU, update
3658 if (ath_tx_ampdu_running(sc, an, tid->tid) &&
3659 bf->bf_state.bfs_dobaw) {
3661 * Only remove the frame from the BAW if it's
3662 * been transmitted at least once; this means
3663 * the frame was in the BAW to begin with.
3665 if (bf->bf_state.bfs_retries > 0) {
3666 ath_tx_update_baw(sc, an, tid, bf);
3667 bf->bf_state.bfs_dobaw = 0;
3671 * This has become a non-fatal error now
3673 if (! bf->bf_state.bfs_addedbaw)
3674 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW
3675 "%s: wasn't added: seqno %d\n",
3676 __func__, SEQNO(bf->bf_state.bfs_seqno));
3680 /* Strip it out of an aggregate list if it was in one */
3683 /* Insert on the free queue to be freed by the caller */
3684 TAILQ_INSERT_TAIL(bf_cq, bf, bf_list);
3688 ath_tx_tid_drain_print(struct ath_softc *sc, struct ath_node *an,
3689 const char *pfx, struct ath_tid *tid, struct ath_buf *bf)
3691 struct ieee80211_node *ni = &an->an_node;
3692 struct ath_txq *txq;
3693 struct ieee80211_tx_ampdu *tap;
3695 txq = sc->sc_ac2q[tid->ac];
3696 tap = ath_tx_get_tx_tid(an, tid->tid);
3698 DPRINTF(sc, ATH_DEBUG_SW_TX,
3699 "%s: %s: %6D: bf=%p: addbaw=%d, dobaw=%d, "
3700 "seqno=%d, retry=%d\n",
3706 bf->bf_state.bfs_addedbaw,
3707 bf->bf_state.bfs_dobaw,
3708 SEQNO(bf->bf_state.bfs_seqno),
3709 bf->bf_state.bfs_retries);
3710 DPRINTF(sc, ATH_DEBUG_SW_TX,
3711 "%s: %s: %6D: bf=%p: txq[%d] axq_depth=%d, axq_aggr_depth=%d\n",
3719 txq->axq_aggr_depth);
3720 DPRINTF(sc, ATH_DEBUG_SW_TX,
3721 "%s: %s: %6D: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d, "
3732 DPRINTF(sc, ATH_DEBUG_SW_TX,
3733 "%s: %s: %6D: tid %d: "
3734 "sched=%d, paused=%d, "
3735 "incomp=%d, baw_head=%d, "
3736 "baw_tail=%d txa_start=%d, ni_txseqs=%d\n",
3742 tid->sched, tid->paused,
3743 tid->incomp, tid->baw_head,
3744 tid->baw_tail, tap == NULL ? -1 : tap->txa_start,
3745 ni->ni_txseqs[tid->tid]);
3747 /* XXX Dump the frame, see what it is? */
3748 ieee80211_dump_pkt(ni->ni_ic,
3749 mtod(bf->bf_m, const uint8_t *),
3750 bf->bf_m->m_len, 0, -1);
3754 * Free any packets currently pending in the software TX queue.
3756 * This will be called when a node is being deleted.
3758 * It can also be called on an active node during an interface
3759 * reset or state transition.
3761 * (From Linux/reference):
3763 * TODO: For frame(s) that are in the retry state, we will reuse the
3764 * sequence number(s) without setting the retry bit. The
3765 * alternative is to give up on these and BAR the receiver's window
3769 ath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an,
3770 struct ath_tid *tid, ath_bufhead *bf_cq)
3773 struct ieee80211_tx_ampdu *tap;
3774 struct ieee80211_node *ni = &an->an_node;
3777 tap = ath_tx_get_tx_tid(an, tid->tid);
3779 ATH_TX_LOCK_ASSERT(sc);
3781 /* Walk the queue, free frames */
3784 bf = ATH_TID_FIRST(tid);
3790 ath_tx_tid_drain_print(sc, an, "norm", tid, bf);
3794 ATH_TID_REMOVE(tid, bf, bf_list);
3795 ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf);
3798 /* And now, drain the filtered frame queue */
3801 bf = ATH_TID_FILT_FIRST(tid);
3806 ath_tx_tid_drain_print(sc, an, "filt", tid, bf);
3810 ATH_TID_FILT_REMOVE(tid, bf, bf_list);
3811 ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf);
3815 * Override the clrdmask configuration for the next frame
3816 * in case there is some future transmission, just to get
3819 * This won't hurt things if the TID is about to be freed.
3821 ath_tx_set_clrdmask(sc, tid->an);
3824 * Now that it's completed, grab the TID lock and update
3825 * the sequence number and BAW window.
3826 * Because sequence numbers have been assigned to frames
3827 * that haven't been sent yet, it's entirely possible
3828 * we'll be called with some pending frames that have not
3831 * The cleaner solution is to do the sequence number allocation
3832 * when the packet is first transmitted - and thus the "retries"
3833 * check above would be enough to update the BAW/seqno.
3836 /* But don't do it for non-QoS TIDs */
3839 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
3840 "%s: %6D: node %p: TID %d: sliding BAW left edge to %d\n",
3848 ni->ni_txseqs[tid->tid] = tap->txa_start;
3849 tid->baw_tail = tid->baw_head;
3854 * Reset the TID state. This must be only called once the node has
3855 * had its frames flushed from this TID, to ensure that no other
3856 * pause / unpause logic can kick in.
3859 ath_tx_tid_reset(struct ath_softc *sc, struct ath_tid *tid)
3863 tid->bar_wait = tid->bar_tx = tid->isfiltered = 0;
3864 tid->paused = tid->sched = tid->addba_tx_pending = 0;
3865 tid->incomp = tid->cleanup_inprogress = 0;
3869 * If we have a bar_wait set, we need to unpause the TID
3870 * here. Otherwise once cleanup has finished, the TID won't
3871 * have the right paused counter.
3873 * XXX I'm not going through resume here - I don't want the
3874 * node to be rescheuled just yet. This however should be
3877 if (tid->bar_wait) {
3878 if (tid->paused > 0) {
3884 * XXX same with a currently filtered TID.
3886 * Since this is being called during a flush, we assume that
3887 * the filtered frame list is actually empty.
3889 * XXX TODO: add in a check to ensure that the filtered queue
3890 * depth is actually 0!
3892 if (tid->isfiltered) {
3893 if (tid->paused > 0) {
3899 * Clear BAR, filtered frames, scheduled and ADDBA pending.
3900 * The TID may be going through cleanup from the last association
3901 * where things in the BAW are still in the hardware queue.
3905 tid->isfiltered = 0;
3907 tid->addba_tx_pending = 0;
3910 * XXX TODO: it may just be enough to walk the HWQs and mark
3911 * frames for that node as non-aggregate; or mark the ath_node
3912 * with something that indicates that aggregation is no longer
3913 * occuring. Then we can just toss the BAW complaints and
3914 * do a complete hard reset of state here - no pause, no
3915 * complete counter, etc.
3921 * Flush all software queued packets for the given node.
3923 * This occurs when a completion handler frees the last buffer
3924 * for a node, and the node is thus freed. This causes the node
3925 * to be cleaned up, which ends up calling ath_tx_node_flush.
3928 ath_tx_node_flush(struct ath_softc *sc, struct ath_node *an)
3936 ATH_KTR(sc, ATH_KTR_NODE, 1, "ath_tx_node_flush: flush node; ni=%p",
3940 DPRINTF(sc, ATH_DEBUG_NODE,
3941 "%s: %6D: flush; is_powersave=%d, stack_psq=%d, tim=%d, "
3942 "swq_depth=%d, clrdmask=%d, leak_count=%d\n",
3944 an->an_node.ni_macaddr,
3946 an->an_is_powersave,
3953 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
3954 struct ath_tid *atid = &an->an_tid[tid];
3957 ath_tx_tid_drain(sc, an, atid, &bf_cq);
3959 /* Remove this tid from the list of active tids */
3960 ath_tx_tid_unsched(sc, atid);
3962 /* Reset the per-TID pause, BAR, etc state */
3963 ath_tx_tid_reset(sc, atid);
3967 * Clear global leak count
3969 an->an_leak_count = 0;
3972 /* Handle completed frames */
3973 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
3974 TAILQ_REMOVE(&bf_cq, bf, bf_list);
3975 ath_tx_default_comp(sc, bf, 0);
3980 * Drain all the software TXQs currently with traffic queued.
3983 ath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq)
3985 struct ath_tid *tid;
3993 * Iterate over all active tids for the given txq,
3994 * flushing and unsched'ing them
3996 while (! TAILQ_EMPTY(&txq->axq_tidq)) {
3997 tid = TAILQ_FIRST(&txq->axq_tidq);
3998 ath_tx_tid_drain(sc, tid->an, tid, &bf_cq);
3999 ath_tx_tid_unsched(sc, tid);
4004 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4005 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4006 ath_tx_default_comp(sc, bf, 0);
4011 * Handle completion of non-aggregate session frames.
4013 * This (currently) doesn't implement software retransmission of
4014 * non-aggregate frames!
4016 * Software retransmission of non-aggregate frames needs to obey
4017 * the strict sequence number ordering, and drop any frames that
4020 * For now, filtered frames and frame transmission will cause
4021 * all kinds of issues. So we don't support them.
4023 * So anyone queuing frames via ath_tx_normal_xmit() or
4024 * ath_tx_hw_queue_norm() must override and set CLRDMASK.
4027 ath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail)
4029 struct ieee80211_node *ni = bf->bf_node;
4030 struct ath_node *an = ATH_NODE(ni);
4031 int tid = bf->bf_state.bfs_tid;
4032 struct ath_tid *atid = &an->an_tid[tid];
4033 struct ath_tx_status *ts = &bf->bf_status.ds_txstat;
4035 /* The TID state is protected behind the TXQ lock */
4038 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n",
4039 __func__, bf, fail, atid->hwq_depth - 1);
4045 * If the frame was filtered, stick it on the filter frame
4046 * queue and complain about it. It shouldn't happen!
4048 if ((ts->ts_status & HAL_TXERR_FILT) ||
4049 (ts->ts_status != 0 && atid->isfiltered)) {
4050 DPRINTF(sc, ATH_DEBUG_SW_TX,
4051 "%s: isfiltered=%d, ts_status=%d: huh?\n",
4055 ath_tx_tid_filt_comp_buf(sc, atid, bf);
4058 if (atid->isfiltered)
4059 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: filtered?!\n", __func__);
4060 if (atid->hwq_depth < 0)
4061 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: hwq_depth < 0: %d\n",
4062 __func__, atid->hwq_depth);
4065 * If the queue is filtered, potentially mark it as complete
4066 * and reschedule it as needed.
4068 * This is required as there may be a subsequent TX descriptor
4069 * for this end-node that has CLRDMASK set, so it's quite possible
4070 * that a filtered frame will be followed by a non-filtered
4071 * (complete or otherwise) frame.
4073 * XXX should we do this before we complete the frame?
4075 if (atid->isfiltered)
4076 ath_tx_tid_filt_comp_complete(sc, atid);
4080 * punt to rate control if we're not being cleaned up
4081 * during a hw queue drain and the frame wanted an ACK.
4083 if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0))
4084 ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc,
4085 ts, bf->bf_state.bfs_pktlen,
4086 1, (ts->ts_status == 0) ? 0 : 1);
4088 ath_tx_default_comp(sc, bf, fail);
4092 * Handle cleanup of aggregate session packets that aren't
4095 * There's no need to update the BAW here - the session is being
4099 ath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf)
4101 struct ieee80211_node *ni = bf->bf_node;
4102 struct ath_node *an = ATH_NODE(ni);
4103 int tid = bf->bf_state.bfs_tid;
4104 struct ath_tid *atid = &an->an_tid[tid];
4106 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n",
4107 __func__, tid, atid->incomp);
4111 if (atid->incomp == 0) {
4112 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4113 "%s: TID %d: cleaned up! resume!\n",
4115 atid->cleanup_inprogress = 0;
4116 ath_tx_tid_resume(sc, atid);
4120 ath_tx_default_comp(sc, bf, 0);
4124 * Performs transmit side cleanup when TID changes from aggregated to
4127 * - Discard all retry frames from the s/w queue.
4128 * - Fix the tx completion function for all buffers in s/w queue.
4129 * - Count the number of unacked frames, and let transmit completion
4132 * The caller is responsible for pausing the TID and unpausing the
4133 * TID if no cleanup was required. Otherwise the cleanup path will
4134 * unpause the TID once the last hardware queued frame is completed.
4137 ath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid,
4140 struct ath_tid *atid = &an->an_tid[tid];
4141 struct ieee80211_tx_ampdu *tap;
4142 struct ath_buf *bf, *bf_next;
4144 ATH_TX_LOCK_ASSERT(sc);
4146 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4147 "%s: TID %d: called\n", __func__, tid);
4150 * Move the filtered frames to the TX queue, before
4151 * we run off and discard/process things.
4153 /* XXX this is really quite inefficient */
4154 while ((bf = ATH_TID_FILT_LAST(atid, ath_bufhead_s)) != NULL) {
4155 ATH_TID_FILT_REMOVE(atid, bf, bf_list);
4156 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4160 * Update the frames in the software TX queue:
4162 * + Discard retry frames in the queue
4163 * + Fix the completion function to be non-aggregate
4165 bf = ATH_TID_FIRST(atid);
4167 if (bf->bf_state.bfs_isretried) {
4168 bf_next = TAILQ_NEXT(bf, bf_list);
4169 ATH_TID_REMOVE(atid, bf, bf_list);
4170 if (bf->bf_state.bfs_dobaw) {
4171 ath_tx_update_baw(sc, an, atid, bf);
4172 if (!bf->bf_state.bfs_addedbaw)
4173 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4174 "%s: wasn't added: seqno %d\n",
4176 SEQNO(bf->bf_state.bfs_seqno));
4178 bf->bf_state.bfs_dobaw = 0;
4180 * Call the default completion handler with "fail" just
4181 * so upper levels are suitably notified about this.
4183 TAILQ_INSERT_TAIL(bf_cq, bf, bf_list);
4187 /* Give these the default completion handler */
4188 bf->bf_comp = ath_tx_normal_comp;
4189 bf = TAILQ_NEXT(bf, bf_list);
4193 * Calculate what hardware-queued frames exist based
4194 * on the current BAW size. Ie, what frames have been
4195 * added to the TX hardware queue for this TID but
4198 tap = ath_tx_get_tx_tid(an, tid);
4199 /* Need the lock - fiddling with BAW */
4200 while (atid->baw_head != atid->baw_tail) {
4201 if (atid->tx_buf[atid->baw_head]) {
4203 atid->cleanup_inprogress = 1;
4204 atid->tx_buf[atid->baw_head] = NULL;
4206 INCR(atid->baw_head, ATH_TID_MAX_BUFS);
4207 INCR(tap->txa_start, IEEE80211_SEQ_RANGE);
4210 if (atid->cleanup_inprogress)
4211 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4212 "%s: TID %d: cleanup needed: %d packets\n",
4213 __func__, tid, atid->incomp);
4215 /* Owner now must free completed frames */
4218 static struct ath_buf *
4219 ath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an,
4220 struct ath_tid *tid, struct ath_buf *bf)
4222 struct ath_buf *nbf;
4226 * Clone the buffer. This will handle the dma unmap and
4227 * copy the node reference to the new buffer. If this
4228 * works out, 'bf' will have no DMA mapping, no mbuf
4229 * pointer and no node reference.
4231 nbf = ath_buf_clone(sc, bf);
4234 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: ATH_BUF_BUSY; cloning\n",
4239 /* Failed to clone */
4240 DPRINTF(sc, ATH_DEBUG_XMIT,
4241 "%s: failed to clone a busy buffer\n",
4246 /* Setup the dma for the new buffer */
4247 error = ath_tx_dmasetup(sc, nbf, nbf->bf_m);
4249 DPRINTF(sc, ATH_DEBUG_XMIT,
4250 "%s: failed to setup dma for clone\n",
4253 * Put this at the head of the list, not tail;
4254 * that way it doesn't interfere with the
4255 * busy buffer logic (which uses the tail of
4259 ath_returnbuf_head(sc, nbf);
4260 ATH_TXBUF_UNLOCK(sc);
4264 /* Update BAW if required, before we free the original buf */
4265 if (bf->bf_state.bfs_dobaw)
4266 ath_tx_switch_baw_buf(sc, an, tid, bf, nbf);
4268 /* Free original buffer; return new buffer */
4269 ath_freebuf(sc, bf);
4275 * Handle retrying an unaggregate frame in an aggregate
4278 * If too many retries occur, pause the TID, wait for
4279 * any further retransmits (as there's no reason why
4280 * non-aggregate frames in an aggregate session are
4281 * transmitted in-order; they just have to be in-BAW)
4282 * and then queue a BAR.
4285 ath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf)
4287 struct ieee80211_node *ni = bf->bf_node;
4288 struct ath_node *an = ATH_NODE(ni);
4289 int tid = bf->bf_state.bfs_tid;
4290 struct ath_tid *atid = &an->an_tid[tid];
4291 struct ieee80211_tx_ampdu *tap;
4295 tap = ath_tx_get_tx_tid(an, tid);
4298 * If the buffer is marked as busy, we can't directly
4299 * reuse it. Instead, try to clone the buffer.
4300 * If the clone is successful, recycle the old buffer.
4301 * If the clone is unsuccessful, set bfs_retries to max
4302 * to force the next bit of code to free the buffer
4305 if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) &&
4306 (bf->bf_flags & ATH_BUF_BUSY)) {
4307 struct ath_buf *nbf;
4308 nbf = ath_tx_retry_clone(sc, an, atid, bf);
4310 /* bf has been freed at this point */
4313 bf->bf_state.bfs_retries = SWMAX_RETRIES + 1;
4316 if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) {
4317 DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES,
4318 "%s: exceeded retries; seqno %d\n",
4319 __func__, SEQNO(bf->bf_state.bfs_seqno));
4320 sc->sc_stats.ast_tx_swretrymax++;
4322 /* Update BAW anyway */
4323 if (bf->bf_state.bfs_dobaw) {
4324 ath_tx_update_baw(sc, an, atid, bf);
4325 if (! bf->bf_state.bfs_addedbaw)
4326 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4327 "%s: wasn't added: seqno %d\n",
4328 __func__, SEQNO(bf->bf_state.bfs_seqno));
4330 bf->bf_state.bfs_dobaw = 0;
4332 /* Suspend the TX queue and get ready to send the BAR */
4333 ath_tx_tid_bar_suspend(sc, atid);
4335 /* Send the BAR if there are no other frames waiting */
4336 if (ath_tx_tid_bar_tx_ready(sc, atid))
4337 ath_tx_tid_bar_tx(sc, atid);
4341 /* Free buffer, bf is free after this call */
4342 ath_tx_default_comp(sc, bf, 0);
4347 * This increments the retry counter as well as
4348 * sets the retry flag in the ath_buf and packet
4351 ath_tx_set_retry(sc, bf);
4352 sc->sc_stats.ast_tx_swretries++;
4355 * Insert this at the head of the queue, so it's
4356 * retried before any current/subsequent frames.
4358 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4359 ath_tx_tid_sched(sc, atid);
4360 /* Send the BAR if there are no other frames waiting */
4361 if (ath_tx_tid_bar_tx_ready(sc, atid))
4362 ath_tx_tid_bar_tx(sc, atid);
4368 * Common code for aggregate excessive retry/subframe retry.
4369 * If retrying, queues buffers to bf_q. If not, frees the
4372 * XXX should unify this with ath_tx_aggr_retry_unaggr()
4375 ath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf,
4378 struct ieee80211_node *ni = bf->bf_node;
4379 struct ath_node *an = ATH_NODE(ni);
4380 int tid = bf->bf_state.bfs_tid;
4381 struct ath_tid *atid = &an->an_tid[tid];
4383 ATH_TX_LOCK_ASSERT(sc);
4385 /* XXX clr11naggr should be done for all subframes */
4386 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
4387 ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0);
4389 /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */
4392 * If the buffer is marked as busy, we can't directly
4393 * reuse it. Instead, try to clone the buffer.
4394 * If the clone is successful, recycle the old buffer.
4395 * If the clone is unsuccessful, set bfs_retries to max
4396 * to force the next bit of code to free the buffer
4399 if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) &&
4400 (bf->bf_flags & ATH_BUF_BUSY)) {
4401 struct ath_buf *nbf;
4402 nbf = ath_tx_retry_clone(sc, an, atid, bf);
4404 /* bf has been freed at this point */
4407 bf->bf_state.bfs_retries = SWMAX_RETRIES + 1;
4410 if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) {
4411 sc->sc_stats.ast_tx_swretrymax++;
4412 DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES,
4413 "%s: max retries: seqno %d\n",
4414 __func__, SEQNO(bf->bf_state.bfs_seqno));
4415 ath_tx_update_baw(sc, an, atid, bf);
4416 if (!bf->bf_state.bfs_addedbaw)
4417 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4418 "%s: wasn't added: seqno %d\n",
4419 __func__, SEQNO(bf->bf_state.bfs_seqno));
4420 bf->bf_state.bfs_dobaw = 0;
4424 ath_tx_set_retry(sc, bf);
4425 sc->sc_stats.ast_tx_swretries++;
4426 bf->bf_next = NULL; /* Just to make sure */
4428 /* Clear the aggregate state */
4429 bf->bf_state.bfs_aggr = 0;
4430 bf->bf_state.bfs_ndelim = 0; /* ??? needed? */
4431 bf->bf_state.bfs_nframes = 1;
4433 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
4438 * error pkt completion for an aggregate destination
4441 ath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first,
4442 struct ath_tid *tid)
4444 struct ieee80211_node *ni = bf_first->bf_node;
4445 struct ath_node *an = ATH_NODE(ni);
4446 struct ath_buf *bf_next, *bf;
4449 struct ieee80211_tx_ampdu *tap;
4456 * Update rate control - all frames have failed.
4458 * XXX use the length in the first frame in the series;
4459 * XXX just so things are consistent for now.
4461 ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc,
4462 &bf_first->bf_status.ds_txstat,
4463 bf_first->bf_state.bfs_pktlen,
4464 bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes);
4467 tap = ath_tx_get_tx_tid(an, tid->tid);
4468 sc->sc_stats.ast_tx_aggr_failall++;
4470 /* Retry all subframes */
4473 bf_next = bf->bf_next;
4474 bf->bf_next = NULL; /* Remove it from the aggr list */
4475 sc->sc_stats.ast_tx_aggr_fail++;
4476 if (ath_tx_retry_subframe(sc, bf, &bf_q)) {
4479 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4484 /* Prepend all frames to the beginning of the queue */
4485 while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) {
4486 TAILQ_REMOVE(&bf_q, bf, bf_list);
4487 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
4491 * Schedule the TID to be re-tried.
4493 ath_tx_tid_sched(sc, tid);
4496 * send bar if we dropped any frames
4498 * Keep the txq lock held for now, as we need to ensure
4499 * that ni_txseqs[] is consistent (as it's being updated
4500 * in the ifnet TX context or raw TX context.)
4503 /* Suspend the TX queue and get ready to send the BAR */
4504 ath_tx_tid_bar_suspend(sc, tid);
4508 * Send BAR if required
4510 if (ath_tx_tid_bar_tx_ready(sc, tid))
4511 ath_tx_tid_bar_tx(sc, tid);
4515 /* Complete frames which errored out */
4516 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4517 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4518 ath_tx_default_comp(sc, bf, 0);
4523 * Handle clean-up of packets from an aggregate list.
4525 * There's no need to update the BAW here - the session is being
4529 ath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first)
4531 struct ath_buf *bf, *bf_next;
4532 struct ieee80211_node *ni = bf_first->bf_node;
4533 struct ath_node *an = ATH_NODE(ni);
4534 int tid = bf_first->bf_state.bfs_tid;
4535 struct ath_tid *atid = &an->an_tid[tid];
4546 if (atid->incomp == 0) {
4547 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4548 "%s: TID %d: cleaned up! resume!\n",
4550 atid->cleanup_inprogress = 0;
4551 ath_tx_tid_resume(sc, atid);
4554 /* Send BAR if required */
4555 /* XXX why would we send a BAR when transitioning to non-aggregation? */
4557 * XXX TODO: we should likely just tear down the BAR state here,
4558 * rather than sending a BAR.
4560 if (ath_tx_tid_bar_tx_ready(sc, atid))
4561 ath_tx_tid_bar_tx(sc, atid);
4565 /* Handle frame completion */
4568 bf_next = bf->bf_next;
4569 ath_tx_default_comp(sc, bf, 1);
4575 * Handle completion of an set of aggregate frames.
4577 * Note: the completion handler is the last descriptor in the aggregate,
4578 * not the last descriptor in the first frame.
4581 ath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first,
4584 //struct ath_desc *ds = bf->bf_lastds;
4585 struct ieee80211_node *ni = bf_first->bf_node;
4586 struct ath_node *an = ATH_NODE(ni);
4587 int tid = bf_first->bf_state.bfs_tid;
4588 struct ath_tid *atid = &an->an_tid[tid];
4589 struct ath_tx_status ts;
4590 struct ieee80211_tx_ampdu *tap;
4596 struct ath_buf *bf, *bf_next;
4599 int nframes = 0, nbad = 0, nf;
4601 /* XXX there's too much on the stack? */
4602 struct ath_rc_series rc[ATH_RC_NUM];
4605 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n",
4606 __func__, atid->hwq_depth);
4609 * Take a copy; this may be needed -after- bf_first
4610 * has been completed and freed.
4612 ts = bf_first->bf_status.ds_txstat;
4617 /* The TID state is kept behind the TXQ lock */
4621 if (atid->hwq_depth < 0)
4622 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: hwq_depth < 0: %d\n",
4623 __func__, atid->hwq_depth);
4626 * If the TID is filtered, handle completing the filter
4627 * transition before potentially kicking it to the cleanup
4630 * XXX this is duplicate work, ew.
4632 if (atid->isfiltered)
4633 ath_tx_tid_filt_comp_complete(sc, atid);
4636 * Punt cleanup to the relevant function, not our problem now
4638 if (atid->cleanup_inprogress) {
4639 if (atid->isfiltered)
4640 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4641 "%s: isfiltered=1, normal_comp?\n",
4644 ath_tx_comp_cleanup_aggr(sc, bf_first);
4649 * If the frame is filtered, transition to filtered frame
4650 * mode and add this to the filtered frame list.
4652 * XXX TODO: figure out how this interoperates with
4653 * BAR, pause and cleanup states.
4655 if ((ts.ts_status & HAL_TXERR_FILT) ||
4656 (ts.ts_status != 0 && atid->isfiltered)) {
4658 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4659 "%s: isfiltered=1, fail=%d\n", __func__, fail);
4660 ath_tx_tid_filt_comp_aggr(sc, atid, bf_first, &bf_cq);
4662 /* Remove from BAW */
4663 TAILQ_FOREACH(bf, &bf_cq, bf_list) {
4664 if (bf->bf_state.bfs_addedbaw)
4666 if (bf->bf_state.bfs_dobaw) {
4667 ath_tx_update_baw(sc, an, atid, bf);
4668 if (!bf->bf_state.bfs_addedbaw)
4669 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4670 "%s: wasn't added: seqno %d\n",
4672 SEQNO(bf->bf_state.bfs_seqno));
4674 bf->bf_state.bfs_dobaw = 0;
4677 * If any intermediate frames in the BAW were dropped when
4678 * handling filtering things, send a BAR.
4681 ath_tx_tid_bar_suspend(sc, atid);
4684 * Finish up by sending a BAR if required and freeing
4685 * the frames outside of the TX lock.
4687 goto finish_send_bar;
4691 * XXX for now, use the first frame in the aggregate for
4692 * XXX rate control completion; it's at least consistent.
4694 pktlen = bf_first->bf_state.bfs_pktlen;
4697 * Handle errors first!
4699 * Here, handle _any_ error as a "exceeded retries" error.
4700 * Later on (when filtered frames are to be specially handled)
4701 * it'll have to be expanded.
4704 if (ts.ts_status & HAL_TXERR_XRETRY) {
4706 if (ts.ts_status != 0) {
4708 ath_tx_comp_aggr_error(sc, bf_first, atid);
4712 tap = ath_tx_get_tx_tid(an, tid);
4715 * extract starting sequence and block-ack bitmap
4717 /* XXX endian-ness of seq_st, ba? */
4718 seq_st = ts.ts_seqnum;
4719 hasba = !! (ts.ts_flags & HAL_TX_BA);
4720 tx_ok = (ts.ts_status == 0);
4721 isaggr = bf_first->bf_state.bfs_aggr;
4722 ba[0] = ts.ts_ba_low;
4723 ba[1] = ts.ts_ba_high;
4726 * Copy the TX completion status and the rate control
4727 * series from the first descriptor, as it may be freed
4728 * before the rate control code can get its grubby fingers
4731 memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc));
4733 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4734 "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, "
4735 "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n",
4736 __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags,
4737 isaggr, seq_st, hasba, ba[0], ba[1]);
4740 * The reference driver doesn't do this; it simply ignores
4741 * this check in its entirety.
4743 * I've seen this occur when using iperf to send traffic
4744 * out tid 1 - the aggregate frames are all marked as TID 1,
4745 * but the TXSTATUS has TID=0. So, let's just ignore this
4749 /* Occasionally, the MAC sends a tx status for the wrong TID. */
4750 if (tid != ts.ts_tid) {
4751 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: tid %d != hw tid %d\n",
4752 __func__, tid, ts.ts_tid);
4757 /* AR5416 BA bug; this requires an interface reset */
4758 if (isaggr && tx_ok && (! hasba)) {
4759 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4760 "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, "
4762 __func__, hasba, tx_ok, isaggr, seq_st);
4763 /* XXX TODO: schedule an interface reset */
4765 ath_printtxbuf(sc, bf_first,
4766 sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0);
4771 * Walk the list of frames, figure out which ones were correctly
4772 * sent and which weren't.
4775 nf = bf_first->bf_state.bfs_nframes;
4777 /* bf_first is going to be invalid once this list is walked */
4781 * Walk the list of completed frames and determine
4782 * which need to be completed and which need to be
4785 * For completed frames, the completion functions need
4786 * to be called at the end of this function as the last
4787 * node reference may free the node.
4789 * Finally, since the TXQ lock can't be held during the
4790 * completion callback (to avoid lock recursion),
4791 * the completion calls have to be done outside of the
4796 ba_index = ATH_BA_INDEX(seq_st,
4797 SEQNO(bf->bf_state.bfs_seqno));
4798 bf_next = bf->bf_next;
4799 bf->bf_next = NULL; /* Remove it from the aggr list */
4801 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4802 "%s: checking bf=%p seqno=%d; ack=%d\n",
4803 __func__, bf, SEQNO(bf->bf_state.bfs_seqno),
4804 ATH_BA_ISSET(ba, ba_index));
4806 if (tx_ok && ATH_BA_ISSET(ba, ba_index)) {
4807 sc->sc_stats.ast_tx_aggr_ok++;
4808 ath_tx_update_baw(sc, an, atid, bf);
4809 bf->bf_state.bfs_dobaw = 0;
4810 if (!bf->bf_state.bfs_addedbaw)
4811 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4812 "%s: wasn't added: seqno %d\n",
4813 __func__, SEQNO(bf->bf_state.bfs_seqno));
4815 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4817 sc->sc_stats.ast_tx_aggr_fail++;
4818 if (ath_tx_retry_subframe(sc, bf, &bf_q)) {
4821 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4829 * Now that the BAW updates have been done, unlock
4831 * txseq is grabbed before the lock is released so we
4832 * have a consistent view of what -was- in the BAW.
4833 * Anything after this point will not yet have been
4836 txseq = tap->txa_start;
4840 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4841 "%s: num frames seen=%d; bf nframes=%d\n",
4842 __func__, nframes, nf);
4845 * Now we know how many frames were bad, call the rate
4849 ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes,
4853 * send bar if we dropped any frames
4856 /* Suspend the TX queue and get ready to send the BAR */
4858 ath_tx_tid_bar_suspend(sc, atid);
4862 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4863 "%s: txa_start now %d\n", __func__, tap->txa_start);
4867 /* Prepend all frames to the beginning of the queue */
4868 while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) {
4869 TAILQ_REMOVE(&bf_q, bf, bf_list);
4870 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4874 * Reschedule to grab some further frames.
4876 ath_tx_tid_sched(sc, atid);
4879 * If the queue is filtered, re-schedule as required.
4881 * This is required as there may be a subsequent TX descriptor
4882 * for this end-node that has CLRDMASK set, so it's quite possible
4883 * that a filtered frame will be followed by a non-filtered
4884 * (complete or otherwise) frame.
4886 * XXX should we do this before we complete the frame?
4888 if (atid->isfiltered)
4889 ath_tx_tid_filt_comp_complete(sc, atid);
4894 * Send BAR if required
4896 if (ath_tx_tid_bar_tx_ready(sc, atid))
4897 ath_tx_tid_bar_tx(sc, atid);
4901 /* Do deferred completion */
4902 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4903 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4904 ath_tx_default_comp(sc, bf, 0);
4909 * Handle completion of unaggregated frames in an ADDBA
4912 * Fail is set to 1 if the entry is being freed via a call to
4913 * ath_tx_draintxq().
4916 ath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail)
4918 struct ieee80211_node *ni = bf->bf_node;
4919 struct ath_node *an = ATH_NODE(ni);
4920 int tid = bf->bf_state.bfs_tid;
4921 struct ath_tid *atid = &an->an_tid[tid];
4922 struct ath_tx_status ts;
4926 * Take a copy of this; filtering/cloning the frame may free the
4929 ts = bf->bf_status.ds_txstat;
4932 * Update rate control status here, before we possibly
4933 * punt to retry or cleanup.
4935 * Do it outside of the TXQ lock.
4937 if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0))
4938 ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc,
4939 &bf->bf_status.ds_txstat,
4940 bf->bf_state.bfs_pktlen,
4941 1, (ts.ts_status == 0) ? 0 : 1);
4944 * This is called early so atid->hwq_depth can be tracked.
4945 * This unfortunately means that it's released and regrabbed
4946 * during retry and cleanup. That's rather inefficient.
4950 if (tid == IEEE80211_NONQOS_TID)
4951 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=16!\n", __func__);
4953 DPRINTF(sc, ATH_DEBUG_SW_TX,
4954 "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n",
4955 __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth,
4956 SEQNO(bf->bf_state.bfs_seqno));
4959 if (atid->hwq_depth < 0)
4960 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: hwq_depth < 0: %d\n",
4961 __func__, atid->hwq_depth);
4964 * If the TID is filtered, handle completing the filter
4965 * transition before potentially kicking it to the cleanup
4968 if (atid->isfiltered)
4969 ath_tx_tid_filt_comp_complete(sc, atid);
4972 * If a cleanup is in progress, punt to comp_cleanup;
4973 * rather than handling it here. It's thus their
4974 * responsibility to clean up, call the completion
4975 * function in net80211, etc.
4977 if (atid->cleanup_inprogress) {
4978 if (atid->isfiltered)
4979 DPRINTF(sc, ATH_DEBUG_SW_TX,
4980 "%s: isfiltered=1, normal_comp?\n",
4983 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n",
4985 ath_tx_comp_cleanup_unaggr(sc, bf);
4990 * XXX TODO: how does cleanup, BAR and filtered frame handling
4993 * If the frame is filtered OR if it's any failure but
4994 * the TID is filtered, the frame must be added to the
4995 * filtered frame list.
4997 * However - a busy buffer can't be added to the filtered
4998 * list as it will end up being recycled without having
4999 * been made available for the hardware.
5001 if ((ts.ts_status & HAL_TXERR_FILT) ||
5002 (ts.ts_status != 0 && atid->isfiltered)) {
5006 DPRINTF(sc, ATH_DEBUG_SW_TX,
5007 "%s: isfiltered=1, fail=%d\n",
5009 freeframe = ath_tx_tid_filt_comp_single(sc, atid, bf);
5011 /* Remove from BAW */
5012 if (bf->bf_state.bfs_addedbaw)
5014 if (bf->bf_state.bfs_dobaw) {
5015 ath_tx_update_baw(sc, an, atid, bf);
5016 if (!bf->bf_state.bfs_addedbaw)
5017 DPRINTF(sc, ATH_DEBUG_SW_TX,
5018 "%s: wasn't added: seqno %d\n",
5019 __func__, SEQNO(bf->bf_state.bfs_seqno));
5021 bf->bf_state.bfs_dobaw = 0;
5025 * If the frame couldn't be filtered, treat it as a drop and
5026 * prepare to send a BAR.
5028 if (freeframe && drops)
5029 ath_tx_tid_bar_suspend(sc, atid);
5032 * Send BAR if required
5034 if (ath_tx_tid_bar_tx_ready(sc, atid))
5035 ath_tx_tid_bar_tx(sc, atid);
5039 * If freeframe is set, then the frame couldn't be
5040 * cloned and bf is still valid. Just complete/free it.
5043 ath_tx_default_comp(sc, bf, fail);
5049 * Don't bother with the retry check if all frames
5050 * are being failed (eg during queue deletion.)
5053 if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) {
5055 if (fail == 0 && ts.ts_status != 0) {
5057 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n",
5059 ath_tx_aggr_retry_unaggr(sc, bf);
5063 /* Success? Complete */
5064 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n",
5065 __func__, tid, SEQNO(bf->bf_state.bfs_seqno));
5066 if (bf->bf_state.bfs_dobaw) {
5067 ath_tx_update_baw(sc, an, atid, bf);
5068 bf->bf_state.bfs_dobaw = 0;
5069 if (!bf->bf_state.bfs_addedbaw)
5070 DPRINTF(sc, ATH_DEBUG_SW_TX,
5071 "%s: wasn't added: seqno %d\n",
5072 __func__, SEQNO(bf->bf_state.bfs_seqno));
5076 * If the queue is filtered, re-schedule as required.
5078 * This is required as there may be a subsequent TX descriptor
5079 * for this end-node that has CLRDMASK set, so it's quite possible
5080 * that a filtered frame will be followed by a non-filtered
5081 * (complete or otherwise) frame.
5083 * XXX should we do this before we complete the frame?
5085 if (atid->isfiltered)
5086 ath_tx_tid_filt_comp_complete(sc, atid);
5089 * Send BAR if required
5091 if (ath_tx_tid_bar_tx_ready(sc, atid))
5092 ath_tx_tid_bar_tx(sc, atid);
5096 ath_tx_default_comp(sc, bf, fail);
5097 /* bf is freed at this point */
5101 ath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail)
5103 if (bf->bf_state.bfs_aggr)
5104 ath_tx_aggr_comp_aggr(sc, bf, fail);
5106 ath_tx_aggr_comp_unaggr(sc, bf, fail);
5110 * Schedule some packets from the given node/TID to the hardware.
5112 * This is the aggregate version.
5115 ath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an,
5116 struct ath_tid *tid)
5119 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
5120 struct ieee80211_tx_ampdu *tap;
5121 ATH_AGGR_STATUS status;
5124 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid);
5125 ATH_TX_LOCK_ASSERT(sc);
5128 * XXX TODO: If we're called for a queue that we're leaking frames to,
5129 * ensure we only leak one.
5132 tap = ath_tx_get_tx_tid(an, tid->tid);
5134 if (tid->tid == IEEE80211_NONQOS_TID)
5135 DPRINTF(sc, ATH_DEBUG_SW_TX,
5136 "%s: called for TID=NONQOS_TID?\n", __func__);
5139 status = ATH_AGGR_DONE;
5142 * If the upper layer has paused the TID, don't
5143 * queue any further packets.
5145 * This can also occur from the completion task because
5146 * of packet loss; but as its serialised with this code,
5147 * it won't "appear" half way through queuing packets.
5149 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
5152 bf = ATH_TID_FIRST(tid);
5158 * If the packet doesn't fall within the BAW (eg a NULL
5159 * data frame), schedule it directly; continue.
5161 if (! bf->bf_state.bfs_dobaw) {
5162 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5163 "%s: non-baw packet\n",
5165 ATH_TID_REMOVE(tid, bf, bf_list);
5167 if (bf->bf_state.bfs_nframes > 1)
5168 DPRINTF(sc, ATH_DEBUG_SW_TX,
5169 "%s: aggr=%d, nframes=%d\n",
5171 bf->bf_state.bfs_aggr,
5172 bf->bf_state.bfs_nframes);
5175 * This shouldn't happen - such frames shouldn't
5176 * ever have been queued as an aggregate in the
5177 * first place. However, make sure the fields
5178 * are correctly setup just to be totally sure.
5180 bf->bf_state.bfs_aggr = 0;
5181 bf->bf_state.bfs_nframes = 1;
5183 /* Update CLRDMASK just before this frame is queued */
5184 ath_tx_update_clrdmask(sc, tid, bf);
5186 ath_tx_do_ratelookup(sc, bf);
5187 ath_tx_calc_duration(sc, bf);
5188 ath_tx_calc_protection(sc, bf);
5189 ath_tx_set_rtscts(sc, bf);
5190 ath_tx_rate_fill_rcflags(sc, bf);
5191 ath_tx_setds(sc, bf);
5192 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
5194 sc->sc_aggr_stats.aggr_nonbaw_pkt++;
5196 /* Queue the packet; continue */
5203 * Do a rate control lookup on the first frame in the
5204 * list. The rate control code needs that to occur
5205 * before it can determine whether to TX.
5206 * It's inaccurate because the rate control code doesn't
5207 * really "do" aggregate lookups, so it only considers
5208 * the size of the first frame.
5210 ath_tx_do_ratelookup(sc, bf);
5211 bf->bf_state.bfs_rc[3].rix = 0;
5212 bf->bf_state.bfs_rc[3].tries = 0;
5214 ath_tx_calc_duration(sc, bf);
5215 ath_tx_calc_protection(sc, bf);
5217 ath_tx_set_rtscts(sc, bf);
5218 ath_tx_rate_fill_rcflags(sc, bf);
5220 status = ath_tx_form_aggr(sc, an, tid, &bf_q);
5222 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5223 "%s: ath_tx_form_aggr() status=%d\n", __func__, status);
5226 * No frames to be picked up - out of BAW
5228 if (TAILQ_EMPTY(&bf_q))
5232 * This assumes that the descriptor list in the ath_bufhead
5233 * are already linked together via bf_next pointers.
5235 bf = TAILQ_FIRST(&bf_q);
5237 if (status == ATH_AGGR_8K_LIMITED)
5238 sc->sc_aggr_stats.aggr_rts_aggr_limited++;
5241 * If it's the only frame send as non-aggregate
5242 * assume that ath_tx_form_aggr() has checked
5243 * whether it's in the BAW and added it appropriately.
5245 if (bf->bf_state.bfs_nframes == 1) {
5246 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5247 "%s: single-frame aggregate\n", __func__);
5249 /* Update CLRDMASK just before this frame is queued */
5250 ath_tx_update_clrdmask(sc, tid, bf);
5252 bf->bf_state.bfs_aggr = 0;
5253 bf->bf_state.bfs_ndelim = 0;
5254 ath_tx_setds(sc, bf);
5255 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
5256 if (status == ATH_AGGR_BAW_CLOSED)
5257 sc->sc_aggr_stats.aggr_baw_closed_single_pkt++;
5259 sc->sc_aggr_stats.aggr_single_pkt++;
5261 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5262 "%s: multi-frame aggregate: %d frames, "
5264 __func__, bf->bf_state.bfs_nframes,
5265 bf->bf_state.bfs_al);
5266 bf->bf_state.bfs_aggr = 1;
5267 sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++;
5268 sc->sc_aggr_stats.aggr_aggr_pkt++;
5270 /* Update CLRDMASK just before this frame is queued */
5271 ath_tx_update_clrdmask(sc, tid, bf);
5274 * Calculate the duration/protection as required.
5276 ath_tx_calc_duration(sc, bf);
5277 ath_tx_calc_protection(sc, bf);
5280 * Update the rate and rtscts information based on the
5281 * rate decision made by the rate control code;
5282 * the first frame in the aggregate needs it.
5284 ath_tx_set_rtscts(sc, bf);
5287 * Setup the relevant descriptor fields
5288 * for aggregation. The first descriptor
5289 * already points to the rest in the chain.
5291 ath_tx_setds_11n(sc, bf);
5295 /* Set completion handler, multi-frame aggregate or not */
5296 bf->bf_comp = ath_tx_aggr_comp;
5298 if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID)
5299 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=16?\n", __func__);
5302 * Update leak count and frame config if were leaking frames.
5304 * XXX TODO: it should update all frames in an aggregate
5307 ath_tx_leak_count_update(sc, tid, bf);
5310 ath_tx_handoff(sc, txq, bf);
5312 /* Track outstanding buffer count to hardware */
5313 /* aggregates are "one" buffer */
5317 * Break out if ath_tx_form_aggr() indicated
5318 * there can't be any further progress (eg BAW is full.)
5319 * Checking for an empty txq is done above.
5321 * XXX locking on txq here?
5323 /* XXX TXQ locking */
5324 if (txq->axq_aggr_depth >= sc->sc_hwq_limit_aggr ||
5325 (status == ATH_AGGR_BAW_CLOSED ||
5326 status == ATH_AGGR_LEAK_CLOSED))
5332 * Schedule some packets from the given node/TID to the hardware.
5334 * XXX TODO: this routine doesn't enforce the maximum TXQ depth.
5335 * It just dumps frames into the TXQ. We should limit how deep
5336 * the transmit queue can grow for frames dispatched to the given
5339 * To avoid locking issues, either we need to own the TXQ lock
5340 * at this point, or we need to pass in the maximum frame count
5344 ath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an,
5345 struct ath_tid *tid)
5348 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
5350 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n",
5351 __func__, an, tid->tid);
5353 ATH_TX_LOCK_ASSERT(sc);
5355 /* Check - is AMPDU pending or running? then print out something */
5356 if (ath_tx_ampdu_pending(sc, an, tid->tid))
5357 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ampdu pending?\n",
5358 __func__, tid->tid);
5359 if (ath_tx_ampdu_running(sc, an, tid->tid))
5360 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ampdu running?\n",
5361 __func__, tid->tid);
5366 * If the upper layers have paused the TID, don't
5367 * queue any further packets.
5369 * XXX if we are leaking frames, make sure we decrement
5370 * that counter _and_ we continue here.
5372 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
5375 bf = ATH_TID_FIRST(tid);
5380 ATH_TID_REMOVE(tid, bf, bf_list);
5383 if (tid->tid != bf->bf_state.bfs_tid) {
5384 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bfs_tid %d !="
5385 " tid %d\n", __func__, bf->bf_state.bfs_tid,
5388 /* Normal completion handler */
5389 bf->bf_comp = ath_tx_normal_comp;
5392 * Override this for now, until the non-aggregate
5393 * completion handler correctly handles software retransmits.
5395 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
5397 /* Update CLRDMASK just before this frame is queued */
5398 ath_tx_update_clrdmask(sc, tid, bf);
5400 /* Program descriptors + rate control */
5401 ath_tx_do_ratelookup(sc, bf);
5402 ath_tx_calc_duration(sc, bf);
5403 ath_tx_calc_protection(sc, bf);
5404 ath_tx_set_rtscts(sc, bf);
5405 ath_tx_rate_fill_rcflags(sc, bf);
5406 ath_tx_setds(sc, bf);
5409 * Update the current leak count if
5410 * we're leaking frames; and set the
5411 * MORE flag as appropriate.
5413 ath_tx_leak_count_update(sc, tid, bf);
5415 /* Track outstanding buffer count to hardware */
5416 /* aggregates are "one" buffer */
5419 /* Punt to hardware or software txq */
5420 ath_tx_handoff(sc, txq, bf);
5425 * Schedule some packets to the given hardware queue.
5427 * This function walks the list of TIDs (ie, ath_node TIDs
5428 * with queued traffic) and attempts to schedule traffic
5431 * TID scheduling is implemented as a FIFO, with TIDs being
5432 * added to the end of the queue after some frames have been
5436 ath_txq_sched(struct ath_softc *sc, struct ath_txq *txq)
5438 struct ath_tid *tid, *last;
5440 ATH_TX_LOCK_ASSERT(sc);
5443 * Don't schedule if the hardware queue is busy.
5444 * This (hopefully) gives some more time to aggregate
5445 * some packets in the aggregation queue.
5447 * XXX It doesn't stop a parallel sender from sneaking
5448 * in transmitting a frame!
5450 /* XXX TXQ locking */
5451 if (txq->axq_aggr_depth + txq->fifo.axq_depth >= sc->sc_hwq_limit_aggr) {
5452 sc->sc_aggr_stats.aggr_sched_nopkt++;
5455 if (txq->axq_depth >= sc->sc_hwq_limit_nonaggr) {
5456 sc->sc_aggr_stats.aggr_sched_nopkt++;
5460 last = TAILQ_LAST(&txq->axq_tidq, axq_t_s);
5462 while ((tid = TAILQ_FIRST(&txq->axq_tidq)) != NULL) {
5464 * Suspend paused queues here; they'll be resumed
5465 * once the addba completes or times out.
5467 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n",
5468 __func__, tid->tid, tid->paused);
5469 ath_tx_tid_unsched(sc, tid);
5471 * This node may be in power-save and we're leaking
5472 * a frame; be careful.
5474 if (! ath_tx_tid_can_tx_or_sched(sc, tid)) {
5479 if (ath_tx_ampdu_running(sc, tid->an, tid->tid))
5480 ath_tx_tid_hw_queue_aggr(sc, tid->an, tid);
5482 ath_tx_tid_hw_queue_norm(sc, tid->an, tid);
5484 /* Not empty? Re-schedule */
5485 if (tid->axq_depth != 0)
5486 ath_tx_tid_sched(sc, tid);
5489 * Give the software queue time to aggregate more
5490 * packets. If we aren't running aggregation then
5491 * we should still limit the hardware queue depth.
5493 /* XXX TXQ locking */
5494 if (txq->axq_aggr_depth + txq->fifo.axq_depth >= sc->sc_hwq_limit_aggr) {
5497 if (txq->axq_depth >= sc->sc_hwq_limit_nonaggr) {
5502 * If this was the last entry on the original list, stop.
5503 * Otherwise nodes that have been rescheduled onto the end
5504 * of the TID FIFO list will just keep being rescheduled.
5506 * XXX What should we do about nodes that were paused
5507 * but are pending a leaking frame in response to a ps-poll?
5508 * They'll be put at the front of the list; so they'll
5509 * prematurely trigger this condition! Ew.
5521 * Return net80211 TID struct pointer, or NULL for none
5523 struct ieee80211_tx_ampdu *
5524 ath_tx_get_tx_tid(struct ath_node *an, int tid)
5526 struct ieee80211_node *ni = &an->an_node;
5527 struct ieee80211_tx_ampdu *tap;
5529 if (tid == IEEE80211_NONQOS_TID)
5532 tap = &ni->ni_tx_ampdu[tid];
5537 * Is AMPDU-TX running?
5540 ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid)
5542 struct ieee80211_tx_ampdu *tap;
5544 if (tid == IEEE80211_NONQOS_TID)
5547 tap = ath_tx_get_tx_tid(an, tid);
5549 return 0; /* Not valid; default to not running */
5551 return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING);
5555 * Is AMPDU-TX negotiation pending?
5558 ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid)
5560 struct ieee80211_tx_ampdu *tap;
5562 if (tid == IEEE80211_NONQOS_TID)
5565 tap = ath_tx_get_tx_tid(an, tid);
5567 return 0; /* Not valid; default to not pending */
5569 return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND);
5573 * Is AMPDU-TX pending for the given TID?
5578 * Method to handle sending an ADDBA request.
5580 * We tap this so the relevant flags can be set to pause the TID
5581 * whilst waiting for the response.
5583 * XXX there's no timeout handler we can override?
5586 ath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5587 int dialogtoken, int baparamset, int batimeout)
5589 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5590 int tid = tap->txa_ac;
5591 struct ath_node *an = ATH_NODE(ni);
5592 struct ath_tid *atid = &an->an_tid[tid];
5595 * XXX danger Will Robinson!
5597 * Although the taskqueue may be running and scheduling some more
5598 * packets, these should all be _before_ the addba sequence number.
5599 * However, net80211 will keep self-assigning sequence numbers
5600 * until addba has been negotiated.
5602 * In the past, these packets would be "paused" (which still works
5603 * fine, as they're being scheduled to the driver in the same
5604 * serialised method which is calling the addba request routine)
5605 * and when the aggregation session begins, they'll be dequeued
5606 * as aggregate packets and added to the BAW. However, now there's
5607 * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these
5608 * packets. Thus they never get included in the BAW tracking and
5609 * this can cause the initial burst of packets after the addba
5610 * negotiation to "hang", as they quickly fall outside the BAW.
5612 * The "eventual" solution should be to tag these packets with
5613 * dobaw. Although net80211 has given us a sequence number,
5614 * it'll be "after" the left edge of the BAW and thus it'll
5619 * This is a bit annoying. Until net80211 HT code inherits some
5620 * (any) locking, we may have this called in parallel BUT only
5621 * one response/timeout will be called. Grr.
5623 if (atid->addba_tx_pending == 0) {
5624 ath_tx_tid_pause(sc, atid);
5625 atid->addba_tx_pending = 1;
5629 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5630 "%s: %6D: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n",
5634 dialogtoken, baparamset, batimeout);
5635 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5636 "%s: txa_start=%d, ni_txseqs=%d\n",
5637 __func__, tap->txa_start, ni->ni_txseqs[tid]);
5639 return sc->sc_addba_request(ni, tap, dialogtoken, baparamset,
5644 * Handle an ADDBA response.
5646 * We unpause the queue so TX'ing can resume.
5648 * Any packets TX'ed from this point should be "aggregate" (whether
5649 * aggregate or not) so the BAW is updated.
5651 * Note! net80211 keeps self-assigning sequence numbers until
5652 * ampdu is negotiated. This means the initially-negotiated BAW left
5653 * edge won't match the ni->ni_txseq.
5655 * So, being very dirty, the BAW left edge is "slid" here to match
5658 * What likely SHOULD happen is that all packets subsequent to the
5659 * addba request should be tagged as aggregate and queued as non-aggregate
5660 * frames; thus updating the BAW. For now though, I'll just slide the
5664 ath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5665 int status, int code, int batimeout)
5667 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5668 int tid = tap->txa_ac;
5669 struct ath_node *an = ATH_NODE(ni);
5670 struct ath_tid *atid = &an->an_tid[tid];
5673 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5674 "%s: %6D: called; status=%d, code=%d, batimeout=%d\n", __func__,
5677 status, code, batimeout);
5679 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5680 "%s: txa_start=%d, ni_txseqs=%d\n",
5681 __func__, tap->txa_start, ni->ni_txseqs[tid]);
5684 * Call this first, so the interface flags get updated
5685 * before the TID is unpaused. Otherwise a race condition
5686 * exists where the unpaused TID still doesn't yet have
5687 * IEEE80211_AGGR_RUNNING set.
5689 r = sc->sc_addba_response(ni, tap, status, code, batimeout);
5692 atid->addba_tx_pending = 0;
5695 * Slide the BAW left edge to wherever net80211 left it for us.
5696 * Read above for more information.
5698 tap->txa_start = ni->ni_txseqs[tid];
5699 ath_tx_tid_resume(sc, atid);
5706 * Stop ADDBA on a queue.
5708 * This can be called whilst BAR TX is currently active on the queue,
5709 * so make sure this is unblocked before continuing.
5712 ath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
5714 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5715 int tid = tap->txa_ac;
5716 struct ath_node *an = ATH_NODE(ni);
5717 struct ath_tid *atid = &an->an_tid[tid];
5721 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: %6D: called\n",
5727 * Pause TID traffic early, so there aren't any races
5728 * Unblock the pending BAR held traffic, if it's currently paused.
5731 ath_tx_tid_pause(sc, atid);
5732 if (atid->bar_wait) {
5734 * bar_unsuspend() expects bar_tx == 1, as it should be
5735 * called from the TX completion path. This quietens
5736 * the warning. It's cleared for us anyway.
5739 ath_tx_tid_bar_unsuspend(sc, atid);
5743 /* There's no need to hold the TXQ lock here */
5744 sc->sc_addba_stop(ni, tap);
5747 * ath_tx_tid_cleanup will resume the TID if possible, otherwise
5748 * it'll set the cleanup flag, and it'll be unpaused once
5749 * things have been cleaned up.
5753 ath_tx_tid_cleanup(sc, an, tid, &bf_cq);
5755 * Unpause the TID if no cleanup is required.
5757 if (! atid->cleanup_inprogress)
5758 ath_tx_tid_resume(sc, atid);
5761 /* Handle completing frames and fail them */
5762 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
5763 TAILQ_REMOVE(&bf_cq, bf, bf_list);
5764 ath_tx_default_comp(sc, bf, 1);
5770 * Handle a node reassociation.
5772 * We may have a bunch of frames queued to the hardware; those need
5773 * to be marked as cleanup.
5776 ath_tx_node_reassoc(struct ath_softc *sc, struct ath_node *an)
5778 struct ath_tid *tid;
5785 ATH_TX_UNLOCK_ASSERT(sc);
5788 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
5789 tid = &an->an_tid[i];
5790 if (tid->hwq_depth == 0)
5792 ath_tx_tid_pause(sc, tid);
5793 DPRINTF(sc, ATH_DEBUG_NODE,
5794 "%s: %6D: TID %d: cleaning up TID\n",
5796 an->an_node.ni_macaddr,
5799 ath_tx_tid_cleanup(sc, an, i, &bf_cq);
5801 * Unpause the TID if no cleanup is required.
5803 if (! tid->cleanup_inprogress)
5804 ath_tx_tid_resume(sc, tid);
5808 /* Handle completing frames and fail them */
5809 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
5810 TAILQ_REMOVE(&bf_cq, bf, bf_list);
5811 ath_tx_default_comp(sc, bf, 1);
5816 * Note: net80211 bar_timeout() doesn't call this function on BAR failure;
5817 * it simply tears down the aggregation session. Ew.
5819 * It however will call ieee80211_ampdu_stop() which will call
5820 * ic->ic_addba_stop().
5822 * XXX This uses a hard-coded max BAR count value; the whole
5823 * XXX BAR TX success or failure should be better handled!
5826 ath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5829 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5830 int tid = tap->txa_ac;
5831 struct ath_node *an = ATH_NODE(ni);
5832 struct ath_tid *atid = &an->an_tid[tid];
5833 int attempts = tap->txa_attempts;
5835 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
5836 "%s: %6D: called; txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n",
5845 /* Note: This may update the BAW details */
5846 sc->sc_bar_response(ni, tap, status);
5848 /* Unpause the TID */
5850 * XXX if this is attempt=50, the TID will be downgraded
5851 * XXX to a non-aggregate session. So we must unpause the
5852 * XXX TID here or it'll never be done.
5854 * Also, don't call it if bar_tx/bar_wait are 0; something
5855 * has beaten us to the punch? (XXX figure out what?)
5857 if (status == 0 || attempts == 50) {
5859 if (atid->bar_tx == 0 || atid->bar_wait == 0)
5860 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
5861 "%s: huh? bar_tx=%d, bar_wait=%d\n",
5863 atid->bar_tx, atid->bar_wait);
5865 ath_tx_tid_bar_unsuspend(sc, atid);
5871 * This is called whenever the pending ADDBA request times out.
5872 * Unpause and reschedule the TID.
5875 ath_addba_response_timeout(struct ieee80211_node *ni,
5876 struct ieee80211_tx_ampdu *tap)
5878 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5879 int tid = tap->txa_ac;
5880 struct ath_node *an = ATH_NODE(ni);
5881 struct ath_tid *atid = &an->an_tid[tid];
5883 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5884 "%s: %6D: TID=%d, called; resuming\n",
5891 atid->addba_tx_pending = 0;
5894 /* Note: This updates the aggregate state to (again) pending */
5895 sc->sc_addba_response_timeout(ni, tap);
5897 /* Unpause the TID; which reschedules it */
5899 ath_tx_tid_resume(sc, atid);
5904 * Check if a node is asleep or not.
5907 ath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an)
5910 ATH_TX_LOCK_ASSERT(sc);
5912 return (an->an_is_powersave);
5916 * Mark a node as currently "in powersaving."
5917 * This suspends all traffic on the node.
5919 * This must be called with the node/tx locks free.
5921 * XXX TODO: the locking silliness below is due to how the node
5922 * locking currently works. Right now, the node lock is grabbed
5923 * to do rate control lookups and these are done with the TX
5924 * queue lock held. This means the node lock can't be grabbed
5925 * first here or a LOR will occur.
5927 * Eventually (hopefully!) the TX path code will only grab
5928 * the TXQ lock when transmitting and the ath_node lock when
5929 * doing node/TID operations. There are other complications -
5930 * the sched/unsched operations involve walking the per-txq
5931 * 'active tid' list and this requires both locks to be held.
5934 ath_tx_node_sleep(struct ath_softc *sc, struct ath_node *an)
5936 struct ath_tid *atid;
5937 struct ath_txq *txq;
5940 ATH_TX_UNLOCK_ASSERT(sc);
5942 /* Suspend all traffic on the node */
5945 if (an->an_is_powersave) {
5946 DPRINTF(sc, ATH_DEBUG_XMIT,
5947 "%s: %6D: node was already asleep!\n",
5948 __func__, an->an_node.ni_macaddr, ":");
5953 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
5954 atid = &an->an_tid[tid];
5955 txq = sc->sc_ac2q[atid->ac];
5957 ath_tx_tid_pause(sc, atid);
5960 /* Mark node as in powersaving */
5961 an->an_is_powersave = 1;
5967 * Mark a node as currently "awake."
5968 * This resumes all traffic to the node.
5971 ath_tx_node_wakeup(struct ath_softc *sc, struct ath_node *an)
5973 struct ath_tid *atid;
5974 struct ath_txq *txq;
5977 ATH_TX_UNLOCK_ASSERT(sc);
5982 if (an->an_is_powersave == 0) {
5984 DPRINTF(sc, ATH_DEBUG_XMIT,
5985 "%s: an=%p: node was already awake\n",
5990 /* Mark node as awake */
5991 an->an_is_powersave = 0;
5993 * Clear any pending leaked frame requests
5995 an->an_leak_count = 0;
5997 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
5998 atid = &an->an_tid[tid];
5999 txq = sc->sc_ac2q[atid->ac];
6001 ath_tx_tid_resume(sc, atid);
6007 ath_legacy_dma_txsetup(struct ath_softc *sc)
6010 /* nothing new needed */
6015 ath_legacy_dma_txteardown(struct ath_softc *sc)
6018 /* nothing new needed */
6023 ath_xmit_setup_legacy(struct ath_softc *sc)
6026 * For now, just set the descriptor length to sizeof(ath_desc);
6027 * worry about extracting the real length out of the HAL later.
6029 sc->sc_tx_desclen = sizeof(struct ath_desc);
6030 sc->sc_tx_statuslen = sizeof(struct ath_desc);
6031 sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */
6033 sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup;
6034 sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown;
6035 sc->sc_tx.xmit_attach_comp_func = ath_legacy_attach_comp_func;
6037 sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart;
6038 sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff;
6040 sc->sc_tx.xmit_drain = ath_legacy_tx_drain;