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
22 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
23 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
26 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGES.
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>
63 #include <machine/bus.h>
66 #include <net/if_var.h>
67 #include <net/if_dl.h>
68 #include <net/if_media.h>
69 #include <net/if_types.h>
70 #include <net/if_arp.h>
71 #include <net/ethernet.h>
72 #include <net/if_llc.h>
74 #include <net80211/ieee80211_var.h>
75 #include <net80211/ieee80211_regdomain.h>
76 #ifdef IEEE80211_SUPPORT_SUPERG
77 #include <net80211/ieee80211_superg.h>
79 #ifdef IEEE80211_SUPPORT_TDMA
80 #include <net80211/ieee80211_tdma.h>
82 #include <net80211/ieee80211_ht.h>
87 #include <netinet/in.h>
88 #include <netinet/if_ether.h>
91 #include <dev/ath/if_athvar.h>
92 #include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */
93 #include <dev/ath/ath_hal/ah_diagcodes.h>
95 #include <dev/ath/if_ath_debug.h>
98 #include <dev/ath/ath_tx99/ath_tx99.h>
101 #include <dev/ath/if_ath_misc.h>
102 #include <dev/ath/if_ath_tx.h>
103 #include <dev/ath/if_ath_tx_ht.h>
106 #include <dev/ath/if_ath_alq.h>
110 * How many retries to perform in software
112 #define SWMAX_RETRIES 10
115 * What queue to throw the non-QoS TID traffic into
117 #define ATH_NONQOS_TID_AC WME_AC_VO
120 static int ath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an);
122 static int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an,
124 static int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an,
126 static ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc,
127 struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0);
128 static int ath_tx_action_frame_override_queue(struct ath_softc *sc,
129 struct ieee80211_node *ni, struct mbuf *m0, int *tid);
130 static struct ath_buf *
131 ath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an,
132 struct ath_tid *tid, struct ath_buf *bf);
136 ath_tx_alq_post(struct ath_softc *sc, struct ath_buf *bf_first)
142 /* XXX we should skip out early if debugging isn't enabled! */
146 /* XXX should ensure bf_nseg > 0! */
147 if (bf->bf_nseg == 0)
149 n = ((bf->bf_nseg - 1) / sc->sc_tx_nmaps) + 1;
150 for (i = 0, ds = (const char *) bf->bf_desc;
152 i++, ds += sc->sc_tx_desclen) {
153 if_ath_alq_post(&sc->sc_alq,
161 #endif /* ATH_DEBUG_ALQ */
164 * Whether to use the 11n rate scenario functions or not
167 ath_tx_is_11n(struct ath_softc *sc)
169 return ((sc->sc_ah->ah_magic == 0x20065416) ||
170 (sc->sc_ah->ah_magic == 0x19741014));
174 * Obtain the current TID from the given frame.
176 * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.)
177 * This has implications for which AC/priority the packet is placed
181 ath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0)
183 const struct ieee80211_frame *wh;
184 int pri = M_WME_GETAC(m0);
186 wh = mtod(m0, const struct ieee80211_frame *);
187 if (! IEEE80211_QOS_HAS_SEQ(wh))
188 return IEEE80211_NONQOS_TID;
190 return WME_AC_TO_TID(pri);
194 ath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf)
196 struct ieee80211_frame *wh;
198 wh = mtod(bf->bf_m, struct ieee80211_frame *);
199 /* Only update/resync if needed */
200 if (bf->bf_state.bfs_isretried == 0) {
201 wh->i_fc[1] |= IEEE80211_FC1_RETRY;
202 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap,
203 BUS_DMASYNC_PREWRITE);
205 bf->bf_state.bfs_isretried = 1;
206 bf->bf_state.bfs_retries ++;
210 * Determine what the correct AC queue for the given frame
213 * This code assumes that the TIDs map consistently to
214 * the underlying hardware (or software) ath_txq.
215 * Since the sender may try to set an AC which is
216 * arbitrary, non-QoS TIDs may end up being put on
217 * completely different ACs. There's no way to put a
218 * TID into multiple ath_txq's for scheduling, so
219 * for now we override the AC/TXQ selection and set
220 * non-QOS TID frames into the BE queue.
222 * This may be completely incorrect - specifically,
223 * some management frames may end up out of order
224 * compared to the QoS traffic they're controlling.
225 * I'll look into this later.
228 ath_tx_getac(struct ath_softc *sc, const struct mbuf *m0)
230 const struct ieee80211_frame *wh;
231 int pri = M_WME_GETAC(m0);
232 wh = mtod(m0, const struct ieee80211_frame *);
233 if (IEEE80211_QOS_HAS_SEQ(wh))
236 return ATH_NONQOS_TID_AC;
240 ath_txfrag_cleanup(struct ath_softc *sc,
241 ath_bufhead *frags, struct ieee80211_node *ni)
243 struct ath_buf *bf, *next;
245 ATH_TXBUF_LOCK_ASSERT(sc);
247 TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) {
248 /* NB: bf assumed clean */
249 TAILQ_REMOVE(frags, bf, bf_list);
250 ath_returnbuf_head(sc, bf);
251 ieee80211_node_decref(ni);
256 * Setup xmit of a fragmented frame. Allocate a buffer
257 * for each frag and bump the node reference count to
258 * reflect the held reference to be setup by ath_tx_start.
261 ath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags,
262 struct mbuf *m0, struct ieee80211_node *ni)
268 for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) {
269 /* XXX non-management? */
270 bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL);
271 if (bf == NULL) { /* out of buffers, cleanup */
272 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: no buffer?\n",
274 ath_txfrag_cleanup(sc, frags, ni);
277 ieee80211_node_incref(ni);
278 TAILQ_INSERT_TAIL(frags, bf, bf_list);
280 ATH_TXBUF_UNLOCK(sc);
282 return !TAILQ_EMPTY(frags);
286 * Reclaim mbuf resources. For fragmented frames we
287 * need to claim each frag chained with m_nextpkt.
290 ath_freetx(struct mbuf *m)
298 } while ((m = next) != NULL);
302 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_sg(sc->sc_dmat, bf->bf_dmamap, m0,
312 bf->bf_segs, &bf->bf_nseg,
314 if (error == EFBIG) {
315 /* XXX packet requires too many descriptors */
316 bf->bf_nseg = ATH_MAX_SCATTER + 1;
317 } else if (error != 0) {
318 sc->sc_stats.ast_tx_busdma++;
323 * Discard null packets and check for packets that
324 * require too many TX descriptors. We try to convert
325 * the latter to a cluster.
327 if (bf->bf_nseg > ATH_MAX_SCATTER) { /* too many desc's, linearize */
328 sc->sc_stats.ast_tx_linear++;
329 m = m_collapse(m0, M_NOWAIT, ATH_MAX_SCATTER);
332 sc->sc_stats.ast_tx_nombuf++;
336 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0,
337 bf->bf_segs, &bf->bf_nseg,
340 sc->sc_stats.ast_tx_busdma++;
344 KASSERT(bf->bf_nseg <= ATH_MAX_SCATTER,
345 ("too many segments after defrag; nseg %u", bf->bf_nseg));
346 } else if (bf->bf_nseg == 0) { /* null packet, discard */
347 sc->sc_stats.ast_tx_nodata++;
351 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n",
352 __func__, m0, m0->m_pkthdr.len);
353 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
360 * Chain together segments+descriptors for a frame - 11n or otherwise.
362 * For aggregates, this is called on each frame in the aggregate.
365 ath_tx_chaindesclist(struct ath_softc *sc, struct ath_desc *ds0,
366 struct ath_buf *bf, int is_aggr, int is_first_subframe,
367 int is_last_subframe)
369 struct ath_hal *ah = sc->sc_ah;
372 HAL_DMA_ADDR bufAddrList[4];
373 uint32_t segLenList[4];
378 * XXX There's txdma and txdma_mgmt; the descriptor
381 struct ath_descdma *dd = &sc->sc_txdma;
384 * Fillin the remainder of the descriptor info.
388 * We need the number of TX data pointers in each descriptor.
389 * EDMA and later chips support 4 TX buffers per descriptor;
390 * previous chips just support one.
392 numTxMaps = sc->sc_tx_nmaps;
395 * For EDMA and later chips ensure the TX map is fully populated
396 * before advancing to the next descriptor.
398 ds = (char *) bf->bf_desc;
400 bzero(bufAddrList, sizeof(bufAddrList));
401 bzero(segLenList, sizeof(segLenList));
402 for (i = 0; i < bf->bf_nseg; i++) {
403 bufAddrList[bp] = bf->bf_segs[i].ds_addr;
404 segLenList[bp] = bf->bf_segs[i].ds_len;
408 * Go to the next segment if this isn't the last segment
409 * and there's space in the current TX map.
411 if ((i != bf->bf_nseg - 1) && (bp < numTxMaps))
415 * Last segment or we're out of buffer pointers.
419 if (i == bf->bf_nseg - 1)
420 ath_hal_settxdesclink(ah, (struct ath_desc *) ds, 0);
422 ath_hal_settxdesclink(ah, (struct ath_desc *) ds,
423 bf->bf_daddr + dd->dd_descsize * (dsp + 1));
426 * XXX This assumes that bfs_txq is the actual destination
427 * hardware queue at this point. It may not have been
428 * assigned, it may actually be pointing to the multicast
429 * software TXQ id. These must be fixed!
431 ath_hal_filltxdesc(ah, (struct ath_desc *) ds
434 , bf->bf_descid /* XXX desc id */
435 , bf->bf_state.bfs_tx_queue
436 , isFirstDesc /* first segment */
437 , i == bf->bf_nseg - 1 /* last segment */
438 , (struct ath_desc *) ds0 /* first descriptor */
442 * Make sure the 11n aggregate fields are cleared.
444 * XXX TODO: this doesn't need to be called for
445 * aggregate frames; as it'll be called on all
446 * sub-frames. Since the descriptors are in
447 * non-cacheable memory, this leads to some
448 * rather slow writes on MIPS/ARM platforms.
450 if (ath_tx_is_11n(sc))
451 ath_hal_clr11n_aggr(sc->sc_ah, (struct ath_desc *) ds);
454 * If 11n is enabled, set it up as if it's an aggregate
457 if (is_last_subframe) {
458 ath_hal_set11n_aggr_last(sc->sc_ah,
459 (struct ath_desc *) ds);
460 } else if (is_aggr) {
462 * This clears the aggrlen field; so
463 * the caller needs to call set_aggr_first()!
465 * XXX TODO: don't call this for the first
466 * descriptor in the first frame in an
469 ath_hal_set11n_aggr_middle(sc->sc_ah,
470 (struct ath_desc *) ds,
471 bf->bf_state.bfs_ndelim);
474 bf->bf_lastds = (struct ath_desc *) ds;
477 * Don't forget to skip to the next descriptor.
479 ds += sc->sc_tx_desclen;
483 * .. and don't forget to blank these out!
485 bzero(bufAddrList, sizeof(bufAddrList));
486 bzero(segLenList, sizeof(segLenList));
488 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
492 * Set the rate control fields in the given descriptor based on
493 * the bf_state fields and node state.
495 * The bfs fields should already be set with the relevant rate
496 * control information, including whether MRR is to be enabled.
498 * Since the FreeBSD HAL currently sets up the first TX rate
499 * in ath_hal_setuptxdesc(), this will setup the MRR
500 * conditionally for the pre-11n chips, and call ath_buf_set_rate
501 * unconditionally for 11n chips. These require the 11n rate
502 * scenario to be set if MCS rates are enabled, so it's easier
503 * to just always call it. The caller can then only set rates 2, 3
504 * and 4 if multi-rate retry is needed.
507 ath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni,
510 struct ath_rc_series *rc = bf->bf_state.bfs_rc;
512 /* If mrr is disabled, blank tries 1, 2, 3 */
513 if (! bf->bf_state.bfs_ismrr)
514 rc[1].tries = rc[2].tries = rc[3].tries = 0;
518 * If NOACK is set, just set ntries=1.
520 else if (bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) {
521 rc[1].tries = rc[2].tries = rc[3].tries = 0;
527 * Always call - that way a retried descriptor will
528 * have the MRR fields overwritten.
530 * XXX TODO: see if this is really needed - setting up
531 * the first descriptor should set the MRR fields to 0
534 if (ath_tx_is_11n(sc)) {
535 ath_buf_set_rate(sc, ni, bf);
537 ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc
538 , rc[1].ratecode, rc[1].tries
539 , rc[2].ratecode, rc[2].tries
540 , rc[3].ratecode, rc[3].tries
546 * Setup segments+descriptors for an 11n aggregate.
547 * bf_first is the first buffer in the aggregate.
548 * The descriptor list must already been linked together using
552 ath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first)
554 struct ath_buf *bf, *bf_prev = NULL;
555 struct ath_desc *ds0 = bf_first->bf_desc;
557 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n",
558 __func__, bf_first->bf_state.bfs_nframes,
559 bf_first->bf_state.bfs_al);
563 if (bf->bf_state.bfs_txrate0 == 0)
564 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: bf=%p, txrate0=%d\n",
566 if (bf->bf_state.bfs_rc[0].ratecode == 0)
567 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: bf=%p, rix0=%d\n",
571 * Setup all descriptors of all subframes - this will
572 * call ath_hal_set11naggrmiddle() on every frame.
575 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
576 "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n",
577 __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen,
578 SEQNO(bf->bf_state.bfs_seqno));
581 * Setup the initial fields for the first descriptor - all
582 * the non-11n specific stuff.
584 ath_hal_setuptxdesc(sc->sc_ah, bf->bf_desc
585 , bf->bf_state.bfs_pktlen /* packet length */
586 , bf->bf_state.bfs_hdrlen /* header length */
587 , bf->bf_state.bfs_atype /* Atheros packet type */
588 , bf->bf_state.bfs_txpower /* txpower */
589 , bf->bf_state.bfs_txrate0
590 , bf->bf_state.bfs_try0 /* series 0 rate/tries */
591 , bf->bf_state.bfs_keyix /* key cache index */
592 , bf->bf_state.bfs_txantenna /* antenna mode */
593 , bf->bf_state.bfs_txflags | HAL_TXDESC_INTREQ /* flags */
594 , bf->bf_state.bfs_ctsrate /* rts/cts rate */
595 , bf->bf_state.bfs_ctsduration /* rts/cts duration */
599 * First descriptor? Setup the rate control and initial
600 * aggregate header information.
602 if (bf == bf_first) {
604 * setup first desc with rate and aggr info
606 ath_tx_set_ratectrl(sc, bf->bf_node, bf);
610 * Setup the descriptors for a multi-descriptor frame.
611 * This is both aggregate and non-aggregate aware.
613 ath_tx_chaindesclist(sc, ds0, bf,
615 !! (bf == bf_first), /* is_first_subframe */
616 !! (bf->bf_next == NULL) /* is_last_subframe */
619 if (bf == bf_first) {
621 * Initialise the first 11n aggregate with the
622 * aggregate length and aggregate enable bits.
624 ath_hal_set11n_aggr_first(sc->sc_ah,
627 bf->bf_state.bfs_ndelim);
631 * Link the last descriptor of the previous frame
632 * to the beginning descriptor of this frame.
635 ath_hal_settxdesclink(sc->sc_ah, bf_prev->bf_lastds,
638 /* Save a copy so we can link the next descriptor in */
644 * Set the first descriptor bf_lastds field to point to
645 * the last descriptor in the last subframe, that's where
646 * the status update will occur.
648 bf_first->bf_lastds = bf_prev->bf_lastds;
651 * And bf_last in the first descriptor points to the end of
652 * the aggregate list.
654 bf_first->bf_last = bf_prev;
657 * For non-AR9300 NICs, which require the rate control
658 * in the final descriptor - let's set that up now.
660 * This is because the filltxdesc() HAL call doesn't
661 * populate the last segment with rate control information
662 * if firstSeg is also true. For non-aggregate frames
663 * that is fine, as the first frame already has rate control
664 * info. But if the last frame in an aggregate has one
665 * descriptor, both firstseg and lastseg will be true and
666 * the rate info isn't copied.
668 * This is inefficient on MIPS/ARM platforms that have
669 * non-cachable memory for TX descriptors, but we'll just
672 * As to why the rate table is stashed in the last descriptor
673 * rather than the first descriptor? Because proctxdesc()
674 * is called on the final descriptor in an MPDU or A-MPDU -
675 * ie, the one that gets updated by the hardware upon
676 * completion. That way proctxdesc() doesn't need to know
677 * about the first _and_ last TX descriptor.
679 ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_lastds, ds0);
681 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__);
685 * Hand-off a frame to the multicast TX queue.
687 * This is a software TXQ which will be appended to the CAB queue
688 * during the beacon setup code.
690 * XXX TODO: since the AR9300 EDMA TX queue support wants the QCU ID
691 * as part of the TX descriptor, bf_state.bfs_tx_queue must be updated
692 * with the actual hardware txq, or all of this will fall apart.
694 * XXX It may not be a bad idea to just stuff the QCU ID into bf_state
695 * and retire bfs_tx_queue; then make sure the CABQ QCU ID is populated
699 ath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq,
702 ATH_TX_LOCK_ASSERT(sc);
704 KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0,
705 ("%s: busy status 0x%x", __func__, bf->bf_flags));
708 * Ensure that the tx queue is the cabq, so things get
711 if (bf->bf_state.bfs_tx_queue != sc->sc_cabq->axq_qnum) {
712 DPRINTF(sc, ATH_DEBUG_XMIT,
713 "%s: bf=%p, bfs_tx_queue=%d, axq_qnum=%d\n",
714 __func__, bf, bf->bf_state.bfs_tx_queue,
719 if (ATH_TXQ_LAST(txq, axq_q_s) != NULL) {
720 struct ath_buf *bf_last = ATH_TXQ_LAST(txq, axq_q_s);
721 struct ieee80211_frame *wh;
723 /* mark previous frame */
724 wh = mtod(bf_last->bf_m, struct ieee80211_frame *);
725 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
726 bus_dmamap_sync(sc->sc_dmat, bf_last->bf_dmamap,
727 BUS_DMASYNC_PREWRITE);
729 /* link descriptor */
730 ath_hal_settxdesclink(sc->sc_ah,
734 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
739 * Hand-off packet to a hardware queue.
742 ath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq,
745 struct ath_hal *ah = sc->sc_ah;
746 struct ath_buf *bf_first;
749 * Insert the frame on the outbound list and pass it on
750 * to the hardware. Multicast frames buffered for power
751 * save stations and transmit from the CAB queue are stored
752 * on a s/w only queue and loaded on to the CAB queue in
753 * the SWBA handler since frames only go out on DTIM and
754 * to avoid possible races.
756 ATH_TX_LOCK_ASSERT(sc);
757 KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0,
758 ("%s: busy status 0x%x", __func__, bf->bf_flags));
759 KASSERT(txq->axq_qnum != ATH_TXQ_SWQ,
760 ("ath_tx_handoff_hw called for mcast queue"));
763 * XXX racy, should hold the PCU lock when checking this,
764 * and also should ensure that the TX counter is >0!
766 KASSERT((sc->sc_inreset_cnt == 0),
767 ("%s: TX during reset?\n", __func__));
771 * This causes a LOR. Find out where the PCU lock is being
772 * held whilst the TXQ lock is grabbed - that shouldn't
776 if (sc->sc_inreset_cnt) {
778 DPRINTF(sc, ATH_DEBUG_RESET,
779 "%s: called with sc_in_reset != 0\n",
781 DPRINTF(sc, ATH_DEBUG_XMIT,
782 "%s: queued: TXDP[%u] = %p (%p) depth %d\n",
783 __func__, txq->axq_qnum,
784 (caddr_t)bf->bf_daddr, bf->bf_desc,
786 /* XXX axq_link needs to be set and updated! */
787 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
788 if (bf->bf_state.bfs_aggr)
789 txq->axq_aggr_depth++;
798 * XXX TODO: if there's a holdingbf, then
799 * ATH_TXQ_PUTRUNNING should be clear.
801 * If there is a holdingbf and the list is empty,
802 * then axq_link should be pointing to the holdingbf.
804 * Otherwise it should point to the last descriptor
805 * in the last ath_buf.
807 * In any case, we should really ensure that we
808 * update the previous descriptor link pointer to
809 * this descriptor, regardless of all of the above state.
811 * For now this is captured by having axq_link point
812 * to either the holdingbf (if the TXQ list is empty)
813 * or the end of the list (if the TXQ list isn't empty.)
814 * I'd rather just kill axq_link here and do it as above.
818 * Append the frame to the TX queue.
820 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
821 ATH_KTR(sc, ATH_KTR_TX, 3,
822 "ath_tx_handoff: non-tdma: txq=%u, add bf=%p "
829 * If there's a link pointer, update it.
831 * XXX we should replace this with the above logic, just
832 * to kill axq_link with fire.
834 if (txq->axq_link != NULL) {
835 *txq->axq_link = bf->bf_daddr;
836 DPRINTF(sc, ATH_DEBUG_XMIT,
837 "%s: link[%u](%p)=%p (%p) depth %d\n", __func__,
838 txq->axq_qnum, txq->axq_link,
839 (caddr_t)bf->bf_daddr, bf->bf_desc,
841 ATH_KTR(sc, ATH_KTR_TX, 5,
842 "ath_tx_handoff: non-tdma: link[%u](%p)=%p (%p) "
844 txq->axq_qnum, txq->axq_link,
845 (caddr_t)bf->bf_daddr, bf->bf_desc,
850 * If we've not pushed anything into the hardware yet,
851 * push the head of the queue into the TxDP.
853 * Once we've started DMA, there's no guarantee that
854 * updating the TxDP with a new value will actually work.
855 * So we just don't do that - if we hit the end of the list,
856 * we keep that buffer around (the "holding buffer") and
857 * re-start DMA by updating the link pointer of _that_
858 * descriptor and then restart DMA.
860 if (! (txq->axq_flags & ATH_TXQ_PUTRUNNING)) {
861 bf_first = TAILQ_FIRST(&txq->axq_q);
862 txq->axq_flags |= ATH_TXQ_PUTRUNNING;
863 ath_hal_puttxbuf(ah, txq->axq_qnum, bf_first->bf_daddr);
864 DPRINTF(sc, ATH_DEBUG_XMIT,
865 "%s: TXDP[%u] = %p (%p) depth %d\n",
866 __func__, txq->axq_qnum,
867 (caddr_t)bf_first->bf_daddr, bf_first->bf_desc,
869 ATH_KTR(sc, ATH_KTR_TX, 5,
870 "ath_tx_handoff: TXDP[%u] = %p (%p) "
871 "lastds=%p depth %d",
873 (caddr_t)bf_first->bf_daddr, bf_first->bf_desc,
879 * Ensure that the bf TXQ matches this TXQ, so later
880 * checking and holding buffer manipulation is sane.
882 if (bf->bf_state.bfs_tx_queue != txq->axq_qnum) {
883 DPRINTF(sc, ATH_DEBUG_XMIT,
884 "%s: bf=%p, bfs_tx_queue=%d, axq_qnum=%d\n",
885 __func__, bf, bf->bf_state.bfs_tx_queue,
890 * Track aggregate queue depth.
892 if (bf->bf_state.bfs_aggr)
893 txq->axq_aggr_depth++;
896 * Update the link pointer.
898 ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link);
903 * If we wrote a TxDP above, DMA will start from here.
905 * If DMA is running, it'll do nothing.
907 * If the DMA engine hit the end of the QCU list (ie LINK=NULL,
908 * or VEOL) then it stops at the last transmitted write.
909 * We then append a new frame by updating the link pointer
910 * in that descriptor and then kick TxE here; it will re-read
911 * that last descriptor and find the new descriptor to transmit.
913 * This is why we keep the holding descriptor around.
915 ath_hal_txstart(ah, txq->axq_qnum);
917 ATH_KTR(sc, ATH_KTR_TX, 1,
918 "ath_tx_handoff: txq=%u, txstart", txq->axq_qnum);
922 * Restart TX DMA for the given TXQ.
924 * This must be called whether the queue is empty or not.
927 ath_legacy_tx_dma_restart(struct ath_softc *sc, struct ath_txq *txq)
929 struct ath_buf *bf, *bf_last;
931 ATH_TXQ_LOCK_ASSERT(txq);
933 /* XXX make this ATH_TXQ_FIRST */
934 bf = TAILQ_FIRST(&txq->axq_q);
935 bf_last = ATH_TXQ_LAST(txq, axq_q_s);
940 DPRINTF(sc, ATH_DEBUG_RESET,
941 "%s: Q%d: bf=%p, bf_last=%p, daddr=0x%08x\n",
946 (uint32_t) bf->bf_daddr);
949 if (sc->sc_debug & ATH_DEBUG_RESET)
950 ath_tx_dump(sc, txq);
954 * This is called from a restart, so DMA is known to be
955 * completely stopped.
957 KASSERT((!(txq->axq_flags & ATH_TXQ_PUTRUNNING)),
958 ("%s: Q%d: called with PUTRUNNING=1\n",
962 ath_hal_puttxbuf(sc->sc_ah, txq->axq_qnum, bf->bf_daddr);
963 txq->axq_flags |= ATH_TXQ_PUTRUNNING;
965 ath_hal_gettxdesclinkptr(sc->sc_ah, bf_last->bf_lastds,
967 ath_hal_txstart(sc->sc_ah, txq->axq_qnum);
971 * Hand off a packet to the hardware (or mcast queue.)
973 * The relevant hardware txq should be locked.
976 ath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq,
979 ATH_TX_LOCK_ASSERT(sc);
982 if (if_ath_alq_checkdebug(&sc->sc_alq, ATH_ALQ_EDMA_TXDESC))
983 ath_tx_alq_post(sc, bf);
986 if (txq->axq_qnum == ATH_TXQ_SWQ)
987 ath_tx_handoff_mcast(sc, txq, bf);
989 ath_tx_handoff_hw(sc, txq, bf);
993 ath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni,
994 struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen,
997 DPRINTF(sc, ATH_DEBUG_XMIT,
998 "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n",
1007 const struct ieee80211_cipher *cip;
1008 struct ieee80211_key *k;
1011 * Construct the 802.11 header+trailer for an encrypted
1012 * frame. The only reason this can fail is because of an
1013 * unknown or unsupported cipher/key type.
1015 k = ieee80211_crypto_encap(ni, m0);
1018 * This can happen when the key is yanked after the
1019 * frame was queued. Just discard the frame; the
1020 * 802.11 layer counts failures and provides
1021 * debugging/diagnostics.
1026 * Adjust the packet + header lengths for the crypto
1027 * additions and calculate the h/w key index. When
1028 * a s/w mic is done the frame will have had any mic
1029 * added to it prior to entry so m0->m_pkthdr.len will
1030 * account for it. Otherwise we need to add it to the
1034 (*hdrlen) += cip->ic_header;
1035 (*pktlen) += cip->ic_header + cip->ic_trailer;
1036 /* NB: frags always have any TKIP MIC done in s/w */
1037 if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag)
1038 (*pktlen) += cip->ic_miclen;
1039 (*keyix) = k->wk_keyix;
1040 } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) {
1042 * Use station key cache slot, if assigned.
1044 (*keyix) = ni->ni_ucastkey.wk_keyix;
1045 if ((*keyix) == IEEE80211_KEYIX_NONE)
1046 (*keyix) = HAL_TXKEYIX_INVALID;
1048 (*keyix) = HAL_TXKEYIX_INVALID;
1054 * Calculate whether interoperability protection is required for
1057 * This requires the rate control information be filled in,
1058 * as the protection requirement depends upon the current
1059 * operating mode / PHY.
1062 ath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf)
1064 struct ieee80211_frame *wh;
1068 const HAL_RATE_TABLE *rt = sc->sc_currates;
1069 struct ifnet *ifp = sc->sc_ifp;
1070 struct ieee80211com *ic = ifp->if_l2com;
1072 flags = bf->bf_state.bfs_txflags;
1073 rix = bf->bf_state.bfs_rc[0].rix;
1074 shortPreamble = bf->bf_state.bfs_shpream;
1075 wh = mtod(bf->bf_m, struct ieee80211_frame *);
1078 * If 802.11g protection is enabled, determine whether
1079 * to use RTS/CTS or just CTS. Note that this is only
1080 * done for OFDM unicast frames.
1082 if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
1083 rt->info[rix].phy == IEEE80211_T_OFDM &&
1084 (flags & HAL_TXDESC_NOACK) == 0) {
1085 bf->bf_state.bfs_doprot = 1;
1086 /* XXX fragments must use CCK rates w/ protection */
1087 if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) {
1088 flags |= HAL_TXDESC_RTSENA;
1089 } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) {
1090 flags |= HAL_TXDESC_CTSENA;
1093 * For frags it would be desirable to use the
1094 * highest CCK rate for RTS/CTS. But stations
1095 * farther away may detect it at a lower CCK rate
1096 * so use the configured protection rate instead
1099 sc->sc_stats.ast_tx_protect++;
1103 * If 11n protection is enabled and it's a HT frame,
1106 * XXX ic_htprotmode or ic_curhtprotmode?
1107 * XXX should it_htprotmode only matter if ic_curhtprotmode
1108 * XXX indicates it's not a HT pure environment?
1110 if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) &&
1111 rt->info[rix].phy == IEEE80211_T_HT &&
1112 (flags & HAL_TXDESC_NOACK) == 0) {
1113 flags |= HAL_TXDESC_RTSENA;
1114 sc->sc_stats.ast_tx_htprotect++;
1116 bf->bf_state.bfs_txflags = flags;
1120 * Update the frame duration given the currently selected rate.
1122 * This also updates the frame duration value, so it will require
1126 ath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf)
1128 struct ieee80211_frame *wh;
1132 struct ath_hal *ah = sc->sc_ah;
1133 const HAL_RATE_TABLE *rt = sc->sc_currates;
1134 int isfrag = bf->bf_m->m_flags & M_FRAG;
1136 flags = bf->bf_state.bfs_txflags;
1137 rix = bf->bf_state.bfs_rc[0].rix;
1138 shortPreamble = bf->bf_state.bfs_shpream;
1139 wh = mtod(bf->bf_m, struct ieee80211_frame *);
1142 * Calculate duration. This logically belongs in the 802.11
1143 * layer but it lacks sufficient information to calculate it.
1145 if ((flags & HAL_TXDESC_NOACK) == 0 &&
1146 (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) {
1149 dur = rt->info[rix].spAckDuration;
1151 dur = rt->info[rix].lpAckDuration;
1152 if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) {
1153 dur += dur; /* additional SIFS+ACK */
1155 * Include the size of next fragment so NAV is
1156 * updated properly. The last fragment uses only
1159 * XXX TODO: ensure that the rate lookup for each
1160 * fragment is the same as the rate used by the
1163 dur += ath_hal_computetxtime(ah,
1166 rix, shortPreamble);
1170 * Force hardware to use computed duration for next
1171 * fragment by disabling multi-rate retry which updates
1172 * duration based on the multi-rate duration table.
1174 bf->bf_state.bfs_ismrr = 0;
1175 bf->bf_state.bfs_try0 = ATH_TXMGTTRY;
1176 /* XXX update bfs_rc[0].try? */
1179 /* Update the duration field itself */
1180 *(u_int16_t *)wh->i_dur = htole16(dur);
1185 ath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt,
1186 int cix, int shortPreamble)
1191 * CTS transmit rate is derived from the transmit rate
1192 * by looking in the h/w rate table. We must also factor
1193 * in whether or not a short preamble is to be used.
1195 /* NB: cix is set above where RTS/CTS is enabled */
1196 KASSERT(cix != 0xff, ("cix not setup"));
1197 ctsrate = rt->info[cix].rateCode;
1199 /* XXX this should only matter for legacy rates */
1201 ctsrate |= rt->info[cix].shortPreamble;
1207 * Calculate the RTS/CTS duration for legacy frames.
1210 ath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix,
1211 int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt,
1214 int ctsduration = 0;
1216 /* This mustn't be called for HT modes */
1217 if (rt->info[cix].phy == IEEE80211_T_HT) {
1218 printf("%s: HT rate where it shouldn't be (0x%x)\n",
1219 __func__, rt->info[cix].rateCode);
1224 * Compute the transmit duration based on the frame
1225 * size and the size of an ACK frame. We call into the
1226 * HAL to do the computation since it depends on the
1227 * characteristics of the actual PHY being used.
1229 * NB: CTS is assumed the same size as an ACK so we can
1230 * use the precalculated ACK durations.
1232 if (shortPreamble) {
1233 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */
1234 ctsduration += rt->info[cix].spAckDuration;
1235 ctsduration += ath_hal_computetxtime(ah,
1236 rt, pktlen, rix, AH_TRUE);
1237 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */
1238 ctsduration += rt->info[rix].spAckDuration;
1240 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */
1241 ctsduration += rt->info[cix].lpAckDuration;
1242 ctsduration += ath_hal_computetxtime(ah,
1243 rt, pktlen, rix, AH_FALSE);
1244 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */
1245 ctsduration += rt->info[rix].lpAckDuration;
1248 return (ctsduration);
1252 * Update the given ath_buf with updated rts/cts setup and duration
1255 * To support rate lookups for each software retry, the rts/cts rate
1256 * and cts duration must be re-calculated.
1258 * This function assumes the RTS/CTS flags have been set as needed;
1259 * mrr has been disabled; and the rate control lookup has been done.
1261 * XXX TODO: MRR need only be disabled for the pre-11n NICs.
1262 * XXX The 11n NICs support per-rate RTS/CTS configuration.
1265 ath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf)
1267 uint16_t ctsduration = 0;
1268 uint8_t ctsrate = 0;
1269 uint8_t rix = bf->bf_state.bfs_rc[0].rix;
1271 const HAL_RATE_TABLE *rt = sc->sc_currates;
1274 * No RTS/CTS enabled? Don't bother.
1276 if ((bf->bf_state.bfs_txflags &
1277 (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) {
1278 /* XXX is this really needed? */
1279 bf->bf_state.bfs_ctsrate = 0;
1280 bf->bf_state.bfs_ctsduration = 0;
1285 * If protection is enabled, use the protection rix control
1286 * rate. Otherwise use the rate0 control rate.
1288 if (bf->bf_state.bfs_doprot)
1289 rix = sc->sc_protrix;
1291 rix = bf->bf_state.bfs_rc[0].rix;
1294 * If the raw path has hard-coded ctsrate0 to something,
1297 if (bf->bf_state.bfs_ctsrate0 != 0)
1298 cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0);
1300 /* Control rate from above */
1301 cix = rt->info[rix].controlRate;
1303 /* Calculate the rtscts rate for the given cix */
1304 ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix,
1305 bf->bf_state.bfs_shpream);
1307 /* The 11n chipsets do ctsduration calculations for you */
1308 if (! ath_tx_is_11n(sc))
1309 ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix,
1310 bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen,
1311 rt, bf->bf_state.bfs_txflags);
1313 /* Squirrel away in ath_buf */
1314 bf->bf_state.bfs_ctsrate = ctsrate;
1315 bf->bf_state.bfs_ctsduration = ctsduration;
1318 * Must disable multi-rate retry when using RTS/CTS.
1320 if (!sc->sc_mrrprot) {
1321 bf->bf_state.bfs_ismrr = 0;
1322 bf->bf_state.bfs_try0 =
1323 bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */
1328 * Setup the descriptor chain for a normal or fast-frame
1331 * XXX TODO: extend to include the destination hardware QCU ID.
1332 * Make sure that is correct. Make sure that when being added
1333 * to the mcastq, the CABQ QCUID is set or things will get a bit
1337 ath_tx_setds(struct ath_softc *sc, struct ath_buf *bf)
1339 struct ath_desc *ds = bf->bf_desc;
1340 struct ath_hal *ah = sc->sc_ah;
1342 if (bf->bf_state.bfs_txrate0 == 0)
1343 DPRINTF(sc, ATH_DEBUG_XMIT,
1344 "%s: bf=%p, txrate0=%d\n", __func__, bf, 0);
1346 ath_hal_setuptxdesc(ah, ds
1347 , bf->bf_state.bfs_pktlen /* packet length */
1348 , bf->bf_state.bfs_hdrlen /* header length */
1349 , bf->bf_state.bfs_atype /* Atheros packet type */
1350 , bf->bf_state.bfs_txpower /* txpower */
1351 , bf->bf_state.bfs_txrate0
1352 , bf->bf_state.bfs_try0 /* series 0 rate/tries */
1353 , bf->bf_state.bfs_keyix /* key cache index */
1354 , bf->bf_state.bfs_txantenna /* antenna mode */
1355 , bf->bf_state.bfs_txflags /* flags */
1356 , bf->bf_state.bfs_ctsrate /* rts/cts rate */
1357 , bf->bf_state.bfs_ctsduration /* rts/cts duration */
1361 * This will be overriden when the descriptor chain is written.
1366 /* Set rate control and descriptor chain for this frame */
1367 ath_tx_set_ratectrl(sc, bf->bf_node, bf);
1368 ath_tx_chaindesclist(sc, ds, bf, 0, 0, 0);
1374 * This performs a rate lookup for the given ath_buf only if it's required.
1375 * Non-data frames and raw frames don't require it.
1377 * This populates the primary and MRR entries; MRR values are
1378 * then disabled later on if something requires it (eg RTS/CTS on
1381 * This needs to be done before the RTS/CTS fields are calculated
1382 * as they may depend upon the rate chosen.
1385 ath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf)
1390 if (! bf->bf_state.bfs_doratelookup)
1393 /* Get rid of any previous state */
1394 bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
1396 ATH_NODE_LOCK(ATH_NODE(bf->bf_node));
1397 ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream,
1398 bf->bf_state.bfs_pktlen, &rix, &try0, &rate);
1400 /* In case MRR is disabled, make sure rc[0] is setup correctly */
1401 bf->bf_state.bfs_rc[0].rix = rix;
1402 bf->bf_state.bfs_rc[0].ratecode = rate;
1403 bf->bf_state.bfs_rc[0].tries = try0;
1405 if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY)
1406 ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix,
1407 bf->bf_state.bfs_rc);
1408 ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node));
1410 sc->sc_txrix = rix; /* for LED blinking */
1411 sc->sc_lastdatarix = rix; /* for fast frames */
1412 bf->bf_state.bfs_try0 = try0;
1413 bf->bf_state.bfs_txrate0 = rate;
1417 * Update the CLRDMASK bit in the ath_buf if it needs to be set.
1420 ath_tx_update_clrdmask(struct ath_softc *sc, struct ath_tid *tid,
1423 struct ath_node *an = ATH_NODE(bf->bf_node);
1425 ATH_TX_LOCK_ASSERT(sc);
1427 if (an->clrdmask == 1) {
1428 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
1434 * Return whether this frame should be software queued or
1435 * direct dispatched.
1437 * When doing powersave, BAR frames should be queued but other management
1438 * frames should be directly sent.
1440 * When not doing powersave, stick BAR frames into the hardware queue
1441 * so it goes out even though the queue is paused.
1443 * For now, management frames are also software queued by default.
1446 ath_tx_should_swq_frame(struct ath_softc *sc, struct ath_node *an,
1447 struct mbuf *m0, int *queue_to_head)
1449 struct ieee80211_node *ni = &an->an_node;
1450 struct ieee80211_frame *wh;
1451 uint8_t type, subtype;
1453 wh = mtod(m0, struct ieee80211_frame *);
1454 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1455 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1457 (*queue_to_head) = 0;
1459 /* If it's not in powersave - direct-dispatch BAR */
1460 if ((ATH_NODE(ni)->an_is_powersave == 0)
1461 && type == IEEE80211_FC0_TYPE_CTL &&
1462 subtype == IEEE80211_FC0_SUBTYPE_BAR) {
1463 DPRINTF(sc, ATH_DEBUG_SW_TX,
1464 "%s: BAR: TX'ing direct\n", __func__);
1466 } else if ((ATH_NODE(ni)->an_is_powersave == 1)
1467 && type == IEEE80211_FC0_TYPE_CTL &&
1468 subtype == IEEE80211_FC0_SUBTYPE_BAR) {
1469 /* BAR TX whilst asleep; queue */
1470 DPRINTF(sc, ATH_DEBUG_SW_TX,
1471 "%s: swq: TX'ing\n", __func__);
1472 (*queue_to_head) = 1;
1474 } else if ((ATH_NODE(ni)->an_is_powersave == 1)
1475 && (type == IEEE80211_FC0_TYPE_MGT ||
1476 type == IEEE80211_FC0_TYPE_CTL)) {
1478 * Other control/mgmt frame; bypass software queuing
1481 DPRINTF(sc, ATH_DEBUG_XMIT,
1482 "%s: %6D: Node is asleep; sending mgmt "
1483 "(type=%d, subtype=%d)\n",
1484 __func__, ni->ni_macaddr, ":", type, subtype);
1493 * Transmit the given frame to the hardware.
1495 * The frame must already be setup; rate control must already have
1498 * XXX since the TXQ lock is being held here (and I dislike holding
1499 * it for this long when not doing software aggregation), later on
1500 * break this function into "setup_normal" and "xmit_normal". The
1501 * lock only needs to be held for the ath_tx_handoff call.
1503 * XXX we don't update the leak count here - if we're doing
1504 * direct frame dispatch, we need to be able to do it without
1505 * decrementing the leak count (eg multicast queue frames.)
1508 ath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq,
1511 struct ath_node *an = ATH_NODE(bf->bf_node);
1512 struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid];
1514 ATH_TX_LOCK_ASSERT(sc);
1517 * For now, just enable CLRDMASK. ath_tx_xmit_normal() does
1518 * set a completion handler however it doesn't (yet) properly
1519 * handle the strict ordering requirements needed for normal,
1520 * non-aggregate session frames.
1522 * Once this is implemented, only set CLRDMASK like this for
1523 * frames that must go out - eg management/raw frames.
1525 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
1527 /* Setup the descriptor before handoff */
1528 ath_tx_do_ratelookup(sc, bf);
1529 ath_tx_calc_duration(sc, bf);
1530 ath_tx_calc_protection(sc, bf);
1531 ath_tx_set_rtscts(sc, bf);
1532 ath_tx_rate_fill_rcflags(sc, bf);
1533 ath_tx_setds(sc, bf);
1535 /* Track per-TID hardware queue depth correctly */
1538 /* Assign the completion handler */
1539 bf->bf_comp = ath_tx_normal_comp;
1541 /* Hand off to hardware */
1542 ath_tx_handoff(sc, txq, bf);
1546 * Do the basic frame setup stuff that's required before the frame
1547 * is added to a software queue.
1549 * All frames get mostly the same treatment and it's done once.
1550 * Retransmits fiddle with things like the rate control setup,
1551 * setting the retransmit bit in the packet; doing relevant DMA/bus
1552 * syncing and relinking it (back) into the hardware TX queue.
1554 * Note that this may cause the mbuf to be reallocated, so
1555 * m0 may not be valid.
1558 ath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni,
1559 struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq)
1561 struct ieee80211vap *vap = ni->ni_vap;
1562 struct ath_hal *ah = sc->sc_ah;
1563 struct ifnet *ifp = sc->sc_ifp;
1564 struct ieee80211com *ic = ifp->if_l2com;
1565 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams;
1566 int error, iswep, ismcast, isfrag, ismrr;
1567 int keyix, hdrlen, pktlen, try0 = 0;
1568 u_int8_t rix = 0, txrate = 0;
1569 struct ath_desc *ds;
1570 struct ieee80211_frame *wh;
1571 u_int subtype, flags;
1573 const HAL_RATE_TABLE *rt;
1574 HAL_BOOL shortPreamble;
1575 struct ath_node *an;
1579 * To ensure that both sequence numbers and the CCMP PN handling
1580 * is "correct", make sure that the relevant TID queue is locked.
1581 * Otherwise the CCMP PN and seqno may appear out of order, causing
1582 * re-ordered frames to have out of order CCMP PN's, resulting
1583 * in many, many frame drops.
1585 ATH_TX_LOCK_ASSERT(sc);
1587 wh = mtod(m0, struct ieee80211_frame *);
1588 iswep = wh->i_fc[1] & IEEE80211_FC1_WEP;
1589 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1590 isfrag = m0->m_flags & M_FRAG;
1591 hdrlen = ieee80211_anyhdrsize(wh);
1593 * Packet length must not include any
1594 * pad bytes; deduct them here.
1596 pktlen = m0->m_pkthdr.len - (hdrlen & 3);
1598 /* Handle encryption twiddling if needed */
1599 if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen,
1605 /* packet header may have moved, reset our local pointer */
1606 wh = mtod(m0, struct ieee80211_frame *);
1608 pktlen += IEEE80211_CRC_LEN;
1611 * Load the DMA map so any coalescing is done. This
1612 * also calculates the number of descriptors we need.
1614 error = ath_tx_dmasetup(sc, bf, m0);
1617 bf->bf_node = ni; /* NB: held reference */
1618 m0 = bf->bf_m; /* NB: may have changed */
1619 wh = mtod(m0, struct ieee80211_frame *);
1621 /* setup descriptors */
1623 rt = sc->sc_currates;
1624 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
1627 * NB: the 802.11 layer marks whether or not we should
1628 * use short preamble based on the current mode and
1629 * negotiated parameters.
1631 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
1632 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) {
1633 shortPreamble = AH_TRUE;
1634 sc->sc_stats.ast_tx_shortpre++;
1636 shortPreamble = AH_FALSE;
1640 //flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */
1642 ismrr = 0; /* default no multi-rate retry*/
1643 pri = M_WME_GETAC(m0); /* honor classification */
1644 /* XXX use txparams instead of fixed values */
1646 * Calculate Atheros packet type from IEEE80211 packet header,
1647 * setup for rate calculations, and select h/w transmit queue.
1649 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
1650 case IEEE80211_FC0_TYPE_MGT:
1651 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1652 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON)
1653 atype = HAL_PKT_TYPE_BEACON;
1654 else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1655 atype = HAL_PKT_TYPE_PROBE_RESP;
1656 else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM)
1657 atype = HAL_PKT_TYPE_ATIM;
1659 atype = HAL_PKT_TYPE_NORMAL; /* XXX */
1660 rix = an->an_mgmtrix;
1661 txrate = rt->info[rix].rateCode;
1663 txrate |= rt->info[rix].shortPreamble;
1664 try0 = ATH_TXMGTTRY;
1665 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
1667 case IEEE80211_FC0_TYPE_CTL:
1668 atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */
1669 rix = an->an_mgmtrix;
1670 txrate = rt->info[rix].rateCode;
1672 txrate |= rt->info[rix].shortPreamble;
1673 try0 = ATH_TXMGTTRY;
1674 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
1676 case IEEE80211_FC0_TYPE_DATA:
1677 atype = HAL_PKT_TYPE_NORMAL; /* default */
1679 * Data frames: multicast frames go out at a fixed rate,
1680 * EAPOL frames use the mgmt frame rate; otherwise consult
1681 * the rate control module for the rate to use.
1684 rix = an->an_mcastrix;
1685 txrate = rt->info[rix].rateCode;
1687 txrate |= rt->info[rix].shortPreamble;
1689 } else if (m0->m_flags & M_EAPOL) {
1690 /* XXX? maybe always use long preamble? */
1691 rix = an->an_mgmtrix;
1692 txrate = rt->info[rix].rateCode;
1694 txrate |= rt->info[rix].shortPreamble;
1695 try0 = ATH_TXMAXTRY; /* XXX?too many? */
1698 * Do rate lookup on each TX, rather than using
1699 * the hard-coded TX information decided here.
1702 bf->bf_state.bfs_doratelookup = 1;
1704 if (cap->cap_wmeParams[pri].wmep_noackPolicy)
1705 flags |= HAL_TXDESC_NOACK;
1708 if_printf(ifp, "bogus frame type 0x%x (%s)\n",
1709 wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__);
1711 /* XXX free tx dmamap */
1717 * There are two known scenarios where the frame AC doesn't match
1718 * what the destination TXQ is.
1720 * + non-QoS frames (eg management?) that the net80211 stack has
1721 * assigned a higher AC to, but since it's a non-QoS TID, it's
1722 * being thrown into TID 16. TID 16 gets the AC_BE queue.
1723 * It's quite possible that management frames should just be
1724 * direct dispatched to hardware rather than go via the software
1725 * queue; that should be investigated in the future. There are
1726 * some specific scenarios where this doesn't make sense, mostly
1727 * surrounding ADDBA request/response - hence why that is special
1730 * + Multicast frames going into the VAP mcast queue. That shows up
1733 * This driver should eventually support separate TID and TXQ locking,
1734 * allowing for arbitrary AC frames to appear on arbitrary software
1735 * queues, being queued to the "correct" hardware queue when needed.
1738 if (txq != sc->sc_ac2q[pri]) {
1739 DPRINTF(sc, ATH_DEBUG_XMIT,
1740 "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n",
1746 sc->sc_ac2q[pri]->axq_qnum);
1751 * Calculate miscellaneous flags.
1754 flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */
1755 } else if (pktlen > vap->iv_rtsthreshold &&
1756 (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) {
1757 flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */
1758 sc->sc_stats.ast_tx_rts++;
1760 if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */
1761 sc->sc_stats.ast_tx_noack++;
1762 #ifdef IEEE80211_SUPPORT_TDMA
1763 if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) {
1764 DPRINTF(sc, ATH_DEBUG_TDMA,
1765 "%s: discard frame, ACK required w/ TDMA\n", __func__);
1766 sc->sc_stats.ast_tdma_ack++;
1767 /* XXX free tx dmamap */
1774 * Determine if a tx interrupt should be generated for
1775 * this descriptor. We take a tx interrupt to reap
1776 * descriptors when the h/w hits an EOL condition or
1777 * when the descriptor is specifically marked to generate
1778 * an interrupt. We periodically mark descriptors in this
1779 * way to insure timely replenishing of the supply needed
1780 * for sending frames. Defering interrupts reduces system
1781 * load and potentially allows more concurrent work to be
1782 * done but if done to aggressively can cause senders to
1785 * NB: use >= to deal with sc_txintrperiod changing
1786 * dynamically through sysctl.
1788 if (flags & HAL_TXDESC_INTREQ) {
1789 txq->axq_intrcnt = 0;
1790 } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) {
1791 flags |= HAL_TXDESC_INTREQ;
1792 txq->axq_intrcnt = 0;
1795 /* This point forward is actual TX bits */
1798 * At this point we are committed to sending the frame
1799 * and we don't need to look at m_nextpkt; clear it in
1800 * case this frame is part of frag chain.
1802 m0->m_nextpkt = NULL;
1804 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT))
1805 ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len,
1806 sc->sc_hwmap[rix].ieeerate, -1);
1808 if (ieee80211_radiotap_active_vap(vap)) {
1809 u_int64_t tsf = ath_hal_gettsf64(ah);
1811 sc->sc_tx_th.wt_tsf = htole64(tsf);
1812 sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags;
1814 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
1816 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG;
1817 sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate;
1818 sc->sc_tx_th.wt_txpower = ieee80211_get_node_txpower(ni);
1819 sc->sc_tx_th.wt_antenna = sc->sc_txantenna;
1821 ieee80211_radiotap_tx(vap, m0);
1824 /* Blank the legacy rate array */
1825 bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
1828 * ath_buf_set_rate needs at least one rate/try to setup
1829 * the rate scenario.
1831 bf->bf_state.bfs_rc[0].rix = rix;
1832 bf->bf_state.bfs_rc[0].tries = try0;
1833 bf->bf_state.bfs_rc[0].ratecode = txrate;
1835 /* Store the decided rate index values away */
1836 bf->bf_state.bfs_pktlen = pktlen;
1837 bf->bf_state.bfs_hdrlen = hdrlen;
1838 bf->bf_state.bfs_atype = atype;
1839 bf->bf_state.bfs_txpower = ieee80211_get_node_txpower(ni);
1840 bf->bf_state.bfs_txrate0 = txrate;
1841 bf->bf_state.bfs_try0 = try0;
1842 bf->bf_state.bfs_keyix = keyix;
1843 bf->bf_state.bfs_txantenna = sc->sc_txantenna;
1844 bf->bf_state.bfs_txflags = flags;
1845 bf->bf_state.bfs_shpream = shortPreamble;
1847 /* XXX this should be done in ath_tx_setrate() */
1848 bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */
1849 bf->bf_state.bfs_ctsrate = 0; /* calculated later */
1850 bf->bf_state.bfs_ctsduration = 0;
1851 bf->bf_state.bfs_ismrr = ismrr;
1857 * Queue a frame to the hardware or software queue.
1859 * This can be called by the net80211 code.
1861 * XXX what about locking? Or, push the seqno assign into the
1862 * XXX aggregate scheduler so its serialised?
1864 * XXX When sending management frames via ath_raw_xmit(),
1865 * should CLRDMASK be set unconditionally?
1868 ath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni,
1869 struct ath_buf *bf, struct mbuf *m0)
1871 struct ieee80211vap *vap = ni->ni_vap;
1872 struct ath_vap *avp = ATH_VAP(vap);
1876 struct ath_txq *txq;
1878 const struct ieee80211_frame *wh;
1879 int is_ampdu, is_ampdu_tx, is_ampdu_pending;
1880 ieee80211_seq seqno;
1881 uint8_t type, subtype;
1884 ATH_TX_LOCK_ASSERT(sc);
1887 * Determine the target hardware queue.
1889 * For multicast frames, the txq gets overridden appropriately
1890 * depending upon the state of PS.
1892 * For any other frame, we do a TID/QoS lookup inside the frame
1893 * to see what the TID should be. If it's a non-QoS frame, the
1894 * AC and TID are overridden. The TID/TXQ code assumes the
1895 * TID is on a predictable hardware TXQ, so we don't support
1896 * having a node TID queued to multiple hardware TXQs.
1897 * This may change in the future but would require some locking
1900 pri = ath_tx_getac(sc, m0);
1901 tid = ath_tx_gettid(sc, m0);
1903 txq = sc->sc_ac2q[pri];
1904 wh = mtod(m0, struct ieee80211_frame *);
1905 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1906 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1907 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1910 * Enforce how deep the multicast queue can grow.
1912 * XXX duplicated in ath_raw_xmit().
1914 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1915 if (sc->sc_cabq->axq_depth + sc->sc_cabq->fifo.axq_depth
1916 > sc->sc_txq_mcastq_maxdepth) {
1917 sc->sc_stats.ast_tx_mcastq_overflow++;
1924 * Enforce how deep the unicast queue can grow.
1926 * If the node is in power save then we don't want
1927 * the software queue to grow too deep, or a node may
1928 * end up consuming all of the ath_buf entries.
1930 * For now, only do this for DATA frames.
1932 * We will want to cap how many management/control
1933 * frames get punted to the software queue so it doesn't
1934 * fill up. But the correct solution isn't yet obvious.
1935 * In any case, this check should at least let frames pass
1936 * that we are direct-dispatching.
1938 * XXX TODO: duplicate this to the raw xmit path!
1940 if (type == IEEE80211_FC0_TYPE_DATA &&
1941 ATH_NODE(ni)->an_is_powersave &&
1942 ATH_NODE(ni)->an_swq_depth >
1943 sc->sc_txq_node_psq_maxdepth) {
1944 sc->sc_stats.ast_tx_node_psq_overflow++;
1950 is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid);
1951 is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid);
1952 is_ampdu = is_ampdu_tx | is_ampdu_pending;
1954 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n",
1955 __func__, tid, pri, is_ampdu);
1957 /* Set local packet state, used to queue packets to hardware */
1958 bf->bf_state.bfs_tid = tid;
1959 bf->bf_state.bfs_tx_queue = txq->axq_qnum;
1960 bf->bf_state.bfs_pri = pri;
1964 * When servicing one or more stations in power-save mode
1965 * (or) if there is some mcast data waiting on the mcast
1966 * queue (to prevent out of order delivery) multicast frames
1967 * must be bufferd until after the beacon.
1969 * TODO: we should lock the mcastq before we check the length.
1971 if (sc->sc_cabq_enable && ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) {
1972 txq = &avp->av_mcastq;
1974 * Mark the frame as eventually belonging on the CAB
1975 * queue, so the descriptor setup functions will
1976 * correctly initialise the descriptor 'qcuId' field.
1978 bf->bf_state.bfs_tx_queue = sc->sc_cabq->axq_qnum;
1982 /* Do the generic frame setup */
1983 /* XXX should just bzero the bf_state? */
1984 bf->bf_state.bfs_dobaw = 0;
1986 /* A-MPDU TX? Manually set sequence number */
1988 * Don't do it whilst pending; the net80211 layer still
1993 * Always call; this function will
1994 * handle making sure that null data frames
1995 * don't get a sequence number from the current
1996 * TID and thus mess with the BAW.
1998 seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0);
2001 * Don't add QoS NULL frames to the BAW.
2003 if (IEEE80211_QOS_HAS_SEQ(wh) &&
2004 subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) {
2005 bf->bf_state.bfs_dobaw = 1;
2010 * If needed, the sequence number has been assigned.
2011 * Squirrel it away somewhere easy to get to.
2013 bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT;
2015 /* Is ampdu pending? fetch the seqno and print it out */
2016 if (is_ampdu_pending)
2017 DPRINTF(sc, ATH_DEBUG_SW_TX,
2018 "%s: tid %d: ampdu pending, seqno %d\n",
2019 __func__, tid, M_SEQNO_GET(m0));
2021 /* This also sets up the DMA map */
2022 r = ath_tx_normal_setup(sc, ni, bf, m0, txq);
2027 /* At this point m0 could have changed! */
2032 * If it's a multicast frame, do a direct-dispatch to the
2033 * destination hardware queue. Don't bother software
2037 * If it's a BAR frame, do a direct dispatch to the
2038 * destination hardware queue. Don't bother software
2039 * queuing it, as the TID will now be paused.
2040 * Sending a BAR frame can occur from the net80211 txa timer
2041 * (ie, retries) or from the ath txtask (completion call.)
2042 * It queues directly to hardware because the TID is paused
2043 * at this point (and won't be unpaused until the BAR has
2044 * either been TXed successfully or max retries has been
2048 * Until things are better debugged - if this node is asleep
2049 * and we're sending it a non-BAR frame, direct dispatch it.
2050 * Why? Because we need to figure out what's actually being
2051 * sent - eg, during reassociation/reauthentication after
2052 * the node (last) disappeared whilst asleep, the driver should
2053 * have unpaused/unsleep'ed the node. So until that is
2054 * sorted out, use this workaround.
2056 if (txq == &avp->av_mcastq) {
2057 DPRINTF(sc, ATH_DEBUG_SW_TX,
2058 "%s: bf=%p: mcastq: TX'ing\n", __func__, bf);
2059 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2060 ath_tx_xmit_normal(sc, txq, bf);
2061 } else if (ath_tx_should_swq_frame(sc, ATH_NODE(ni), m0,
2063 ath_tx_swq(sc, ni, txq, queue_to_head, bf);
2065 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2066 ath_tx_xmit_normal(sc, txq, bf);
2070 * For now, since there's no software queue,
2071 * direct-dispatch to the hardware.
2073 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2075 * Update the current leak count if
2076 * we're leaking frames; and set the
2077 * MORE flag as appropriate.
2079 ath_tx_leak_count_update(sc, tid, bf);
2080 ath_tx_xmit_normal(sc, txq, bf);
2087 ath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni,
2088 struct ath_buf *bf, struct mbuf *m0,
2089 const struct ieee80211_bpf_params *params)
2091 struct ifnet *ifp = sc->sc_ifp;
2092 struct ieee80211com *ic = ifp->if_l2com;
2093 struct ath_hal *ah = sc->sc_ah;
2094 struct ieee80211vap *vap = ni->ni_vap;
2095 int error, ismcast, ismrr;
2096 int keyix, hdrlen, pktlen, try0, txantenna;
2097 u_int8_t rix, txrate;
2098 struct ieee80211_frame *wh;
2101 const HAL_RATE_TABLE *rt;
2102 struct ath_desc *ds;
2106 uint8_t type, subtype;
2109 ATH_TX_LOCK_ASSERT(sc);
2111 wh = mtod(m0, struct ieee80211_frame *);
2112 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
2113 hdrlen = ieee80211_anyhdrsize(wh);
2115 * Packet length must not include any
2116 * pad bytes; deduct them here.
2118 /* XXX honor IEEE80211_BPF_DATAPAD */
2119 pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN;
2121 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
2122 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
2124 ATH_KTR(sc, ATH_KTR_TX, 2,
2125 "ath_tx_raw_start: ni=%p, bf=%p, raw", ni, bf);
2127 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n",
2130 pri = params->ibp_pri & 3;
2131 /* Override pri if the frame isn't a QoS one */
2132 if (! IEEE80211_QOS_HAS_SEQ(wh))
2133 pri = ath_tx_getac(sc, m0);
2135 /* XXX If it's an ADDBA, override the correct queue */
2136 do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid);
2138 /* Map ADDBA to the correct priority */
2141 DPRINTF(sc, ATH_DEBUG_XMIT,
2142 "%s: overriding tid %d pri %d -> %d\n",
2143 __func__, o_tid, pri, TID_TO_WME_AC(o_tid));
2145 pri = TID_TO_WME_AC(o_tid);
2148 /* Handle encryption twiddling if needed */
2149 if (! ath_tx_tag_crypto(sc, ni,
2150 m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0,
2151 &hdrlen, &pktlen, &keyix)) {
2155 /* packet header may have moved, reset our local pointer */
2156 wh = mtod(m0, struct ieee80211_frame *);
2158 /* Do the generic frame setup */
2159 /* XXX should just bzero the bf_state? */
2160 bf->bf_state.bfs_dobaw = 0;
2162 error = ath_tx_dmasetup(sc, bf, m0);
2165 m0 = bf->bf_m; /* NB: may have changed */
2166 wh = mtod(m0, struct ieee80211_frame *);
2167 bf->bf_node = ni; /* NB: held reference */
2169 /* Always enable CLRDMASK for raw frames for now.. */
2170 flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */
2171 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
2172 if (params->ibp_flags & IEEE80211_BPF_RTS)
2173 flags |= HAL_TXDESC_RTSENA;
2174 else if (params->ibp_flags & IEEE80211_BPF_CTS) {
2175 /* XXX assume 11g/11n protection? */
2176 bf->bf_state.bfs_doprot = 1;
2177 flags |= HAL_TXDESC_CTSENA;
2179 /* XXX leave ismcast to injector? */
2180 if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast)
2181 flags |= HAL_TXDESC_NOACK;
2183 rt = sc->sc_currates;
2184 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
2185 rix = ath_tx_findrix(sc, params->ibp_rate0);
2186 txrate = rt->info[rix].rateCode;
2187 if (params->ibp_flags & IEEE80211_BPF_SHORTPRE)
2188 txrate |= rt->info[rix].shortPreamble;
2190 try0 = params->ibp_try0;
2191 ismrr = (params->ibp_try1 != 0);
2192 txantenna = params->ibp_pri >> 2;
2193 if (txantenna == 0) /* XXX? */
2194 txantenna = sc->sc_txantenna;
2197 * Since ctsrate is fixed, store it away for later
2198 * use when the descriptor fields are being set.
2200 if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA))
2201 bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate;
2204 * NB: we mark all packets as type PSPOLL so the h/w won't
2205 * set the sequence number, duration, etc.
2207 atype = HAL_PKT_TYPE_PSPOLL;
2209 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT))
2210 ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len,
2211 sc->sc_hwmap[rix].ieeerate, -1);
2213 if (ieee80211_radiotap_active_vap(vap)) {
2214 u_int64_t tsf = ath_hal_gettsf64(ah);
2216 sc->sc_tx_th.wt_tsf = htole64(tsf);
2217 sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags;
2218 if (wh->i_fc[1] & IEEE80211_FC1_WEP)
2219 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
2220 if (m0->m_flags & M_FRAG)
2221 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG;
2222 sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate;
2223 sc->sc_tx_th.wt_txpower = MIN(params->ibp_power,
2224 ieee80211_get_node_txpower(ni));
2225 sc->sc_tx_th.wt_antenna = sc->sc_txantenna;
2227 ieee80211_radiotap_tx(vap, m0);
2231 * Formulate first tx descriptor with tx controls.
2234 /* XXX check return value? */
2236 /* Store the decided rate index values away */
2237 bf->bf_state.bfs_pktlen = pktlen;
2238 bf->bf_state.bfs_hdrlen = hdrlen;
2239 bf->bf_state.bfs_atype = atype;
2240 bf->bf_state.bfs_txpower = MIN(params->ibp_power,
2241 ieee80211_get_node_txpower(ni));
2242 bf->bf_state.bfs_txrate0 = txrate;
2243 bf->bf_state.bfs_try0 = try0;
2244 bf->bf_state.bfs_keyix = keyix;
2245 bf->bf_state.bfs_txantenna = txantenna;
2246 bf->bf_state.bfs_txflags = flags;
2247 bf->bf_state.bfs_shpream =
2248 !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE);
2250 /* Set local packet state, used to queue packets to hardware */
2251 bf->bf_state.bfs_tid = WME_AC_TO_TID(pri);
2252 bf->bf_state.bfs_tx_queue = sc->sc_ac2q[pri]->axq_qnum;
2253 bf->bf_state.bfs_pri = pri;
2255 /* XXX this should be done in ath_tx_setrate() */
2256 bf->bf_state.bfs_ctsrate = 0;
2257 bf->bf_state.bfs_ctsduration = 0;
2258 bf->bf_state.bfs_ismrr = ismrr;
2260 /* Blank the legacy rate array */
2261 bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
2263 bf->bf_state.bfs_rc[0].rix =
2264 ath_tx_findrix(sc, params->ibp_rate0);
2265 bf->bf_state.bfs_rc[0].tries = try0;
2266 bf->bf_state.bfs_rc[0].ratecode = txrate;
2271 rix = ath_tx_findrix(sc, params->ibp_rate1);
2272 bf->bf_state.bfs_rc[1].rix = rix;
2273 bf->bf_state.bfs_rc[1].tries = params->ibp_try1;
2275 rix = ath_tx_findrix(sc, params->ibp_rate2);
2276 bf->bf_state.bfs_rc[2].rix = rix;
2277 bf->bf_state.bfs_rc[2].tries = params->ibp_try2;
2279 rix = ath_tx_findrix(sc, params->ibp_rate3);
2280 bf->bf_state.bfs_rc[3].rix = rix;
2281 bf->bf_state.bfs_rc[3].tries = params->ibp_try3;
2284 * All the required rate control decisions have been made;
2285 * fill in the rc flags.
2287 ath_tx_rate_fill_rcflags(sc, bf);
2289 /* NB: no buffered multicast in power save support */
2292 * If we're overiding the ADDBA destination, dump directly
2293 * into the hardware queue, right after any pending
2294 * frames to that node are.
2296 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n",
2297 __func__, do_override);
2301 * Put addba frames in the right place in the right TID/HWQ.
2304 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2306 * XXX if it's addba frames, should we be leaking
2307 * them out via the frame leak method?
2308 * XXX for now let's not risk it; but we may wish
2309 * to investigate this later.
2311 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2312 } else if (ath_tx_should_swq_frame(sc, ATH_NODE(ni), m0,
2314 /* Queue to software queue */
2315 ath_tx_swq(sc, ni, sc->sc_ac2q[pri], queue_to_head, bf);
2317 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2318 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2321 /* Direct-dispatch to the hardware */
2322 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2324 * Update the current leak count if
2325 * we're leaking frames; and set the
2326 * MORE flag as appropriate.
2328 ath_tx_leak_count_update(sc, tid, bf);
2329 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2337 * This can be called by net80211.
2340 ath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
2341 const struct ieee80211_bpf_params *params)
2343 struct ieee80211com *ic = ni->ni_ic;
2344 struct ifnet *ifp = ic->ic_ifp;
2345 struct ath_softc *sc = ifp->if_softc;
2347 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
2351 if (sc->sc_inreset_cnt > 0) {
2352 DPRINTF(sc, ATH_DEBUG_XMIT,
2353 "%s: sc_inreset_cnt > 0; bailing\n", __func__);
2358 sc->sc_txstart_cnt++;
2363 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) {
2364 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__,
2365 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ?
2366 "!running" : "invalid");
2373 * Enforce how deep the multicast queue can grow.
2375 * XXX duplicated in ath_tx_start().
2377 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2378 if (sc->sc_cabq->axq_depth + sc->sc_cabq->fifo.axq_depth
2379 > sc->sc_txq_mcastq_maxdepth) {
2380 sc->sc_stats.ast_tx_mcastq_overflow++;
2391 * Grab a TX buffer and associated resources.
2393 bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT);
2395 sc->sc_stats.ast_tx_nobuf++;
2400 ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: m=%p, params=%p, bf=%p\n",
2403 if (params == NULL) {
2405 * Legacy path; interpret frame contents to decide
2406 * precisely how to send the frame.
2408 if (ath_tx_start(sc, ni, bf, m)) {
2409 error = EIO; /* XXX */
2414 * Caller supplied explicit parameters to use in
2415 * sending the frame.
2417 if (ath_tx_raw_start(sc, ni, bf, m, params)) {
2418 error = EIO; /* XXX */
2422 sc->sc_wd_timer = 5;
2424 sc->sc_stats.ast_tx_raw++;
2427 * Update the TIM - if there's anything queued to the
2428 * software queue and power save is enabled, we should
2431 ath_tx_update_tim(sc, ni, 1);
2436 sc->sc_txstart_cnt--;
2441 ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: bad2: m=%p, params=%p, "
2447 ath_returnbuf_head(sc, bf);
2448 ATH_TXBUF_UNLOCK(sc);
2454 sc->sc_txstart_cnt--;
2457 ATH_KTR(sc, ATH_KTR_TX, 2, "ath_raw_xmit: bad0: m=%p, params=%p",
2460 sc->sc_stats.ast_tx_raw_fail++;
2461 ieee80211_free_node(ni);
2466 /* Some helper functions */
2469 * ADDBA (and potentially others) need to be placed in the same
2470 * hardware queue as the TID/node it's relating to. This is so
2471 * it goes out after any pending non-aggregate frames to the
2474 * If this isn't done, the ADDBA can go out before the frames
2475 * queued in hardware. Even though these frames have a sequence
2476 * number -earlier- than the ADDBA can be transmitted (but
2477 * no frames whose sequence numbers are after the ADDBA should
2478 * be!) they'll arrive after the ADDBA - and the receiving end
2479 * will simply drop them as being out of the BAW.
2481 * The frames can't be appended to the TID software queue - it'll
2482 * never be sent out. So these frames have to be directly
2483 * dispatched to the hardware, rather than queued in software.
2484 * So if this function returns true, the TXQ has to be
2485 * overridden and it has to be directly dispatched.
2487 * It's a dirty hack, but someone's gotta do it.
2491 * XXX doesn't belong here!
2494 ieee80211_is_action(struct ieee80211_frame *wh)
2496 /* Type: Management frame? */
2497 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) !=
2498 IEEE80211_FC0_TYPE_MGT)
2501 /* Subtype: Action frame? */
2502 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) !=
2503 IEEE80211_FC0_SUBTYPE_ACTION)
2509 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
2511 * Return an alternate TID for ADDBA request frames.
2513 * Yes, this likely should be done in the net80211 layer.
2516 ath_tx_action_frame_override_queue(struct ath_softc *sc,
2517 struct ieee80211_node *ni,
2518 struct mbuf *m0, int *tid)
2520 struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *);
2521 struct ieee80211_action_ba_addbarequest *ia;
2523 uint16_t baparamset;
2525 /* Not action frame? Bail */
2526 if (! ieee80211_is_action(wh))
2529 /* XXX Not needed for frames we send? */
2531 /* Correct length? */
2532 if (! ieee80211_parse_action(ni, m))
2536 /* Extract out action frame */
2537 frm = (u_int8_t *)&wh[1];
2538 ia = (struct ieee80211_action_ba_addbarequest *) frm;
2540 /* Not ADDBA? Bail */
2541 if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA)
2543 if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST)
2546 /* Extract TID, return it */
2547 baparamset = le16toh(ia->rq_baparamset);
2548 *tid = (int) MS(baparamset, IEEE80211_BAPS_TID);
2554 /* Per-node software queue operations */
2557 * Add the current packet to the given BAW.
2558 * It is assumed that the current packet
2560 * + fits inside the BAW;
2561 * + already has had a sequence number allocated.
2563 * Since the BAW status may be modified by both the ath task and
2564 * the net80211/ifnet contexts, the TID must be locked.
2567 ath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an,
2568 struct ath_tid *tid, struct ath_buf *bf)
2571 struct ieee80211_tx_ampdu *tap;
2573 ATH_TX_LOCK_ASSERT(sc);
2575 if (bf->bf_state.bfs_isretried)
2578 tap = ath_tx_get_tx_tid(an, tid->tid);
2580 if (! bf->bf_state.bfs_dobaw) {
2581 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2582 "%s: dobaw=0, seqno=%d, window %d:%d\n",
2583 __func__, SEQNO(bf->bf_state.bfs_seqno),
2584 tap->txa_start, tap->txa_wnd);
2587 if (bf->bf_state.bfs_addedbaw)
2588 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2589 "%s: re-added? tid=%d, seqno %d; window %d:%d; "
2590 "baw head=%d tail=%d\n",
2591 __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2592 tap->txa_start, tap->txa_wnd, tid->baw_head,
2596 * Verify that the given sequence number is not outside of the
2597 * BAW. Complain loudly if that's the case.
2599 if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd,
2600 SEQNO(bf->bf_state.bfs_seqno))) {
2601 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2602 "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; "
2603 "baw head=%d tail=%d\n",
2604 __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2605 tap->txa_start, tap->txa_wnd, tid->baw_head,
2610 * ni->ni_txseqs[] is the currently allocated seqno.
2611 * the txa state contains the current baw start.
2613 index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno));
2614 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2615 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2616 "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d "
2617 "baw head=%d tail=%d\n",
2618 __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2619 tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head,
2624 assert(tid->tx_buf[cindex] == NULL);
2626 if (tid->tx_buf[cindex] != NULL) {
2627 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2628 "%s: ba packet dup (index=%d, cindex=%d, "
2629 "head=%d, tail=%d)\n",
2630 __func__, index, cindex, tid->baw_head, tid->baw_tail);
2631 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2632 "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n",
2634 tid->tx_buf[cindex],
2635 SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno),
2637 SEQNO(bf->bf_state.bfs_seqno)
2640 tid->tx_buf[cindex] = bf;
2642 if (index >= ((tid->baw_tail - tid->baw_head) &
2643 (ATH_TID_MAX_BUFS - 1))) {
2644 tid->baw_tail = cindex;
2645 INCR(tid->baw_tail, ATH_TID_MAX_BUFS);
2650 * Flip the BAW buffer entry over from the existing one to the new one.
2652 * When software retransmitting a (sub-)frame, it is entirely possible that
2653 * the frame ath_buf is marked as BUSY and can't be immediately reused.
2654 * In that instance the buffer is cloned and the new buffer is used for
2655 * retransmit. We thus need to update the ath_buf slot in the BAW buf
2656 * tracking array to maintain consistency.
2659 ath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an,
2660 struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf)
2663 struct ieee80211_tx_ampdu *tap;
2664 int seqno = SEQNO(old_bf->bf_state.bfs_seqno);
2666 ATH_TX_LOCK_ASSERT(sc);
2668 tap = ath_tx_get_tx_tid(an, tid->tid);
2669 index = ATH_BA_INDEX(tap->txa_start, seqno);
2670 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2673 * Just warn for now; if it happens then we should find out
2674 * about it. It's highly likely the aggregation session will
2677 if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) {
2678 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2679 "%s: retransmitted buffer"
2680 " has mismatching seqno's, BA session may hang.\n",
2682 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2683 "%s: old seqno=%d, new_seqno=%d\n", __func__,
2684 old_bf->bf_state.bfs_seqno, new_bf->bf_state.bfs_seqno);
2687 if (tid->tx_buf[cindex] != old_bf) {
2688 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2689 "%s: ath_buf pointer incorrect; "
2690 " has m BA session may hang.\n", __func__);
2691 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2692 "%s: old bf=%p, new bf=%p\n", __func__, old_bf, new_bf);
2695 tid->tx_buf[cindex] = new_bf;
2699 * seq_start - left edge of BAW
2700 * seq_next - current/next sequence number to allocate
2702 * Since the BAW status may be modified by both the ath task and
2703 * the net80211/ifnet contexts, the TID must be locked.
2706 ath_tx_update_baw(struct ath_softc *sc, struct ath_node *an,
2707 struct ath_tid *tid, const struct ath_buf *bf)
2710 struct ieee80211_tx_ampdu *tap;
2711 int seqno = SEQNO(bf->bf_state.bfs_seqno);
2713 ATH_TX_LOCK_ASSERT(sc);
2715 tap = ath_tx_get_tx_tid(an, tid->tid);
2716 index = ATH_BA_INDEX(tap->txa_start, seqno);
2717 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2719 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2720 "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, "
2721 "baw head=%d, tail=%d\n",
2722 __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index,
2723 cindex, tid->baw_head, tid->baw_tail);
2726 * If this occurs then we have a big problem - something else
2727 * has slid tap->txa_start along without updating the BAW
2728 * tracking start/end pointers. Thus the TX BAW state is now
2729 * completely busted.
2731 * But for now, since I haven't yet fixed TDMA and buffer cloning,
2732 * it's quite possible that a cloned buffer is making its way
2733 * here and causing it to fire off. Disable TDMA for now.
2735 if (tid->tx_buf[cindex] != bf) {
2736 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2737 "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n",
2738 __func__, bf, SEQNO(bf->bf_state.bfs_seqno),
2739 tid->tx_buf[cindex],
2740 (tid->tx_buf[cindex] != NULL) ?
2741 SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno) : -1);
2744 tid->tx_buf[cindex] = NULL;
2746 while (tid->baw_head != tid->baw_tail &&
2747 !tid->tx_buf[tid->baw_head]) {
2748 INCR(tap->txa_start, IEEE80211_SEQ_RANGE);
2749 INCR(tid->baw_head, ATH_TID_MAX_BUFS);
2751 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2752 "%s: baw is now %d:%d, baw head=%d\n",
2753 __func__, tap->txa_start, tap->txa_wnd, tid->baw_head);
2757 ath_tx_leak_count_update(struct ath_softc *sc, struct ath_tid *tid,
2760 struct ieee80211_frame *wh;
2762 ATH_TX_LOCK_ASSERT(sc);
2764 if (tid->an->an_leak_count > 0) {
2765 wh = mtod(bf->bf_m, struct ieee80211_frame *);
2768 * Update MORE based on the software/net80211 queue states.
2770 if ((tid->an->an_stack_psq > 0)
2771 || (tid->an->an_swq_depth > 0))
2772 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
2774 wh->i_fc[1] &= ~IEEE80211_FC1_MORE_DATA;
2776 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
2777 "%s: %6D: leak count = %d, psq=%d, swq=%d, MORE=%d\n",
2779 tid->an->an_node.ni_macaddr,
2781 tid->an->an_leak_count,
2782 tid->an->an_stack_psq,
2783 tid->an->an_swq_depth,
2784 !! (wh->i_fc[1] & IEEE80211_FC1_MORE_DATA));
2787 * Re-sync the underlying buffer.
2789 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap,
2790 BUS_DMASYNC_PREWRITE);
2792 tid->an->an_leak_count --;
2797 ath_tx_tid_can_tx_or_sched(struct ath_softc *sc, struct ath_tid *tid)
2800 ATH_TX_LOCK_ASSERT(sc);
2802 if (tid->an->an_leak_count > 0) {
2811 * Mark the current node/TID as ready to TX.
2813 * This is done to make it easy for the software scheduler to
2814 * find which nodes have data to send.
2816 * The TXQ lock must be held.
2819 ath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid)
2821 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
2823 ATH_TX_LOCK_ASSERT(sc);
2826 * If we are leaking out a frame to this destination
2827 * for PS-POLL, ensure that we allow scheduling to
2830 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
2831 return; /* paused, can't schedule yet */
2834 return; /* already scheduled */
2840 * If this is a sleeping node we're leaking to, given
2841 * it a higher priority. This is so bad for QoS it hurts.
2843 if (tid->an->an_leak_count) {
2844 TAILQ_INSERT_HEAD(&txq->axq_tidq, tid, axq_qelem);
2846 TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem);
2851 * We can't do the above - it'll confuse the TXQ software
2852 * scheduler which will keep checking the _head_ TID
2853 * in the list to see if it has traffic. If we queue
2854 * a TID to the head of the list and it doesn't transmit,
2855 * we'll check it again.
2857 * So, get the rest of this leaking frames support working
2858 * and reliable first and _then_ optimise it so they're
2859 * pushed out in front of any other pending software
2862 TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem);
2866 * Mark the current node as no longer needing to be polled for
2869 * The TXQ lock must be held.
2872 ath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid)
2874 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
2876 ATH_TX_LOCK_ASSERT(sc);
2878 if (tid->sched == 0)
2882 TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem);
2886 * Assign a sequence number manually to the given frame.
2888 * This should only be called for A-MPDU TX frames.
2890 static ieee80211_seq
2891 ath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni,
2892 struct ath_buf *bf, struct mbuf *m0)
2894 struct ieee80211_frame *wh;
2896 ieee80211_seq seqno;
2900 wh = mtod(m0, struct ieee80211_frame *);
2901 pri = M_WME_GETAC(m0); /* honor classification */
2902 tid = WME_AC_TO_TID(pri);
2903 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n",
2904 __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh));
2906 /* XXX Is it a control frame? Ignore */
2908 /* Does the packet require a sequence number? */
2909 if (! IEEE80211_QOS_HAS_SEQ(wh))
2912 ATH_TX_LOCK_ASSERT(sc);
2915 * Is it a QOS NULL Data frame? Give it a sequence number from
2916 * the default TID (IEEE80211_NONQOS_TID.)
2918 * The RX path of everything I've looked at doesn't include the NULL
2919 * data frame sequence number in the aggregation state updates, so
2920 * assigning it a sequence number there will cause a BAW hole on the
2923 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
2924 if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) {
2925 /* XXX no locking for this TID? This is a bit of a problem. */
2926 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID];
2927 INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE);
2929 /* Manually assign sequence number */
2930 seqno = ni->ni_txseqs[tid];
2931 INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE);
2933 *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
2934 M_SEQNO_SET(m0, seqno);
2936 /* Return so caller can do something with it if needed */
2937 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno);
2942 * Attempt to direct dispatch an aggregate frame to hardware.
2943 * If the frame is out of BAW, queue.
2944 * Otherwise, schedule it as a single frame.
2947 ath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an,
2948 struct ath_txq *txq, struct ath_buf *bf)
2950 struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid];
2951 struct ieee80211_tx_ampdu *tap;
2953 ATH_TX_LOCK_ASSERT(sc);
2955 tap = ath_tx_get_tx_tid(an, tid->tid);
2958 if (! ath_tx_tid_can_tx_or_sched(sc, tid)) {
2959 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
2960 /* XXX don't sched - we're paused! */
2964 /* outside baw? queue */
2965 if (bf->bf_state.bfs_dobaw &&
2966 (! BAW_WITHIN(tap->txa_start, tap->txa_wnd,
2967 SEQNO(bf->bf_state.bfs_seqno)))) {
2968 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
2969 ath_tx_tid_sched(sc, tid);
2974 * This is a temporary check and should be removed once
2975 * all the relevant code paths have been fixed.
2977 * During aggregate retries, it's possible that the head
2978 * frame will fail (which has the bfs_aggr and bfs_nframes
2979 * fields set for said aggregate) and will be retried as
2980 * a single frame. In this instance, the values should
2981 * be reset or the completion code will get upset with you.
2983 if (bf->bf_state.bfs_aggr != 0 || bf->bf_state.bfs_nframes > 1) {
2984 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
2985 "%s: bfs_aggr=%d, bfs_nframes=%d\n", __func__,
2986 bf->bf_state.bfs_aggr, bf->bf_state.bfs_nframes);
2987 bf->bf_state.bfs_aggr = 0;
2988 bf->bf_state.bfs_nframes = 1;
2991 /* Update CLRDMASK just before this frame is queued */
2992 ath_tx_update_clrdmask(sc, tid, bf);
2994 /* Direct dispatch to hardware */
2995 ath_tx_do_ratelookup(sc, bf);
2996 ath_tx_calc_duration(sc, bf);
2997 ath_tx_calc_protection(sc, bf);
2998 ath_tx_set_rtscts(sc, bf);
2999 ath_tx_rate_fill_rcflags(sc, bf);
3000 ath_tx_setds(sc, bf);
3003 sc->sc_aggr_stats.aggr_low_hwq_single_pkt++;
3005 /* Track per-TID hardware queue depth correctly */
3009 if (bf->bf_state.bfs_dobaw) {
3010 ath_tx_addto_baw(sc, an, tid, bf);
3011 bf->bf_state.bfs_addedbaw = 1;
3014 /* Set completion handler, multi-frame aggregate or not */
3015 bf->bf_comp = ath_tx_aggr_comp;
3018 * Update the current leak count if
3019 * we're leaking frames; and set the
3020 * MORE flag as appropriate.
3022 ath_tx_leak_count_update(sc, tid, bf);
3024 /* Hand off to hardware */
3025 ath_tx_handoff(sc, txq, bf);
3029 * Attempt to send the packet.
3030 * If the queue isn't busy, direct-dispatch.
3031 * If the queue is busy enough, queue the given packet on the
3032 * relevant software queue.
3035 ath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni,
3036 struct ath_txq *txq, int queue_to_head, struct ath_buf *bf)
3038 struct ath_node *an = ATH_NODE(ni);
3039 struct ieee80211_frame *wh;
3040 struct ath_tid *atid;
3042 struct mbuf *m0 = bf->bf_m;
3044 ATH_TX_LOCK_ASSERT(sc);
3046 /* Fetch the TID - non-QoS frames get assigned to TID 16 */
3047 wh = mtod(m0, struct ieee80211_frame *);
3048 pri = ath_tx_getac(sc, m0);
3049 tid = ath_tx_gettid(sc, m0);
3050 atid = &an->an_tid[tid];
3052 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n",
3053 __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh));
3055 /* Set local packet state, used to queue packets to hardware */
3056 /* XXX potentially duplicate info, re-check */
3057 bf->bf_state.bfs_tid = tid;
3058 bf->bf_state.bfs_tx_queue = txq->axq_qnum;
3059 bf->bf_state.bfs_pri = pri;
3062 * If the hardware queue isn't busy, queue it directly.
3063 * If the hardware queue is busy, queue it.
3064 * If the TID is paused or the traffic it outside BAW, software
3067 * If the node is in power-save and we're leaking a frame,
3068 * leak a single frame.
3070 if (! ath_tx_tid_can_tx_or_sched(sc, atid)) {
3071 /* TID is paused, queue */
3072 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__);
3074 * If the caller requested that it be sent at a high
3075 * priority, queue it at the head of the list.
3078 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
3080 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3081 } else if (ath_tx_ampdu_pending(sc, an, tid)) {
3082 /* AMPDU pending; queue */
3083 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__);
3084 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3086 } else if (ath_tx_ampdu_running(sc, an, tid)) {
3087 /* AMPDU running, attempt direct dispatch if possible */
3090 * Always queue the frame to the tail of the list.
3092 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3095 * If the hardware queue isn't busy, direct dispatch
3096 * the head frame in the list. Don't schedule the
3097 * TID - let it build some more frames first?
3099 * When running A-MPDU, always just check the hardware
3100 * queue depth against the aggregate frame limit.
3101 * We don't want to burst a large number of single frames
3102 * out to the hardware; we want to aggressively hold back.
3104 * Otherwise, schedule the TID.
3106 /* XXX TXQ locking */
3107 if (txq->axq_depth + txq->fifo.axq_depth < sc->sc_hwq_limit_aggr) {
3108 bf = ATH_TID_FIRST(atid);
3109 ATH_TID_REMOVE(atid, bf, bf_list);
3112 * Ensure it's definitely treated as a non-AMPDU
3113 * frame - this information may have been left
3114 * over from a previous attempt.
3116 bf->bf_state.bfs_aggr = 0;
3117 bf->bf_state.bfs_nframes = 1;
3119 /* Queue to the hardware */
3120 ath_tx_xmit_aggr(sc, an, txq, bf);
3121 DPRINTF(sc, ATH_DEBUG_SW_TX,
3125 DPRINTF(sc, ATH_DEBUG_SW_TX,
3126 "%s: ampdu; swq'ing\n",
3129 ath_tx_tid_sched(sc, atid);
3132 * If we're not doing A-MPDU, be prepared to direct dispatch
3133 * up to both limits if possible. This particular corner
3134 * case may end up with packet starvation between aggregate
3135 * traffic and non-aggregate traffic: we wnat to ensure
3136 * that non-aggregate stations get a few frames queued to the
3137 * hardware before the aggregate station(s) get their chance.
3139 * So if you only ever see a couple of frames direct dispatched
3140 * to the hardware from a non-AMPDU client, check both here
3141 * and in the software queue dispatcher to ensure that those
3142 * non-AMPDU stations get a fair chance to transmit.
3144 /* XXX TXQ locking */
3145 } else if ((txq->axq_depth + txq->fifo.axq_depth < sc->sc_hwq_limit_nonaggr) &&
3146 (txq->axq_aggr_depth < sc->sc_hwq_limit_aggr)) {
3147 /* AMPDU not running, attempt direct dispatch */
3148 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__);
3149 /* See if clrdmask needs to be set */
3150 ath_tx_update_clrdmask(sc, atid, bf);
3153 * Update the current leak count if
3154 * we're leaking frames; and set the
3155 * MORE flag as appropriate.
3157 ath_tx_leak_count_update(sc, atid, bf);
3160 * Dispatch the frame.
3162 ath_tx_xmit_normal(sc, txq, bf);
3165 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__);
3166 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3167 ath_tx_tid_sched(sc, atid);
3172 * Only set the clrdmask bit if none of the nodes are currently
3175 * XXX TODO: go through all the callers and check to see
3176 * which are being called in the context of looping over all
3177 * TIDs (eg, if all tids are being paused, resumed, etc.)
3178 * That'll avoid O(n^2) complexity here.
3181 ath_tx_set_clrdmask(struct ath_softc *sc, struct ath_node *an)
3185 ATH_TX_LOCK_ASSERT(sc);
3187 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
3188 if (an->an_tid[i].isfiltered == 1)
3195 * Configure the per-TID node state.
3197 * This likely belongs in if_ath_node.c but I can't think of anywhere
3198 * else to put it just yet.
3200 * This sets up the SLISTs and the mutex as appropriate.
3203 ath_tx_tid_init(struct ath_softc *sc, struct ath_node *an)
3206 struct ath_tid *atid;
3208 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
3209 atid = &an->an_tid[i];
3211 /* XXX now with this bzer(), is the field 0'ing needed? */
3212 bzero(atid, sizeof(*atid));
3214 TAILQ_INIT(&atid->tid_q);
3215 TAILQ_INIT(&atid->filtq.tid_q);
3218 for (j = 0; j < ATH_TID_MAX_BUFS; j++)
3219 atid->tx_buf[j] = NULL;
3220 atid->baw_head = atid->baw_tail = 0;
3223 atid->hwq_depth = 0;
3224 atid->cleanup_inprogress = 0;
3225 if (i == IEEE80211_NONQOS_TID)
3226 atid->ac = ATH_NONQOS_TID_AC;
3228 atid->ac = TID_TO_WME_AC(i);
3230 an->clrdmask = 1; /* Always start by setting this bit */
3234 * Pause the current TID. This stops packets from being transmitted
3237 * Since this is also called from upper layers as well as the driver,
3238 * it will get the TID lock.
3241 ath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid)
3244 ATH_TX_LOCK_ASSERT(sc);
3246 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n",
3247 __func__, tid->paused);
3251 * Unpause the current TID, and schedule it if needed.
3254 ath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid)
3256 ATH_TX_LOCK_ASSERT(sc);
3259 * There's some odd places where ath_tx_tid_resume() is called
3260 * when it shouldn't be; this works around that particular issue
3261 * until it's actually resolved.
3263 if (tid->paused == 0) {
3264 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
3265 "%s: %6D: paused=0?\n", __func__,
3266 tid->an->an_node.ni_macaddr, ":");
3271 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n",
3272 __func__, tid->paused);
3278 * Override the clrdmask configuration for the next frame
3279 * from this TID, just to get the ball rolling.
3281 ath_tx_set_clrdmask(sc, tid->an);
3283 if (tid->axq_depth == 0)
3286 /* XXX isfiltered shouldn't ever be 0 at this point */
3287 if (tid->isfiltered == 1) {
3288 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: filtered?!\n",
3293 ath_tx_tid_sched(sc, tid);
3296 * Queue the software TX scheduler.
3298 ath_tx_swq_kick(sc);
3302 * Add the given ath_buf to the TID filtered frame list.
3303 * This requires the TID be filtered.
3306 ath_tx_tid_filt_addbuf(struct ath_softc *sc, struct ath_tid *tid,
3310 ATH_TX_LOCK_ASSERT(sc);
3312 if (!tid->isfiltered)
3313 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: not filtered?!\n",
3316 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: bf=%p\n", __func__, bf);
3318 /* Set the retry bit and bump the retry counter */
3319 ath_tx_set_retry(sc, bf);
3320 sc->sc_stats.ast_tx_swfiltered++;
3322 ATH_TID_FILT_INSERT_TAIL(tid, bf, bf_list);
3326 * Handle a completed filtered frame from the given TID.
3327 * This just enables/pauses the filtered frame state if required
3328 * and appends the filtered frame to the filtered queue.
3331 ath_tx_tid_filt_comp_buf(struct ath_softc *sc, struct ath_tid *tid,
3335 ATH_TX_LOCK_ASSERT(sc);
3337 if (! tid->isfiltered) {
3338 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: filter transition\n",
3340 tid->isfiltered = 1;
3341 ath_tx_tid_pause(sc, tid);
3344 /* Add the frame to the filter queue */
3345 ath_tx_tid_filt_addbuf(sc, tid, bf);
3349 * Complete the filtered frame TX completion.
3351 * If there are no more frames in the hardware queue, unpause/unfilter
3352 * the TID if applicable. Otherwise we will wait for a node PS transition
3356 ath_tx_tid_filt_comp_complete(struct ath_softc *sc, struct ath_tid *tid)
3360 ATH_TX_LOCK_ASSERT(sc);
3362 if (tid->hwq_depth != 0)
3365 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: hwq=0, transition back\n",
3367 tid->isfiltered = 0;
3368 /* XXX ath_tx_tid_resume() also calls ath_tx_set_clrdmask()! */
3369 ath_tx_set_clrdmask(sc, tid->an);
3371 /* XXX this is really quite inefficient */
3372 while ((bf = ATH_TID_FILT_LAST(tid, ath_bufhead_s)) != NULL) {
3373 ATH_TID_FILT_REMOVE(tid, bf, bf_list);
3374 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
3377 ath_tx_tid_resume(sc, tid);
3381 * Called when a single (aggregate or otherwise) frame is completed.
3383 * Returns 1 if the buffer could be added to the filtered list
3384 * (cloned or otherwise), 0 if the buffer couldn't be added to the
3385 * filtered list (failed clone; expired retry) and the caller should
3386 * free it and handle it like a failure (eg by sending a BAR.)
3389 ath_tx_tid_filt_comp_single(struct ath_softc *sc, struct ath_tid *tid,
3392 struct ath_buf *nbf;
3395 ATH_TX_LOCK_ASSERT(sc);
3398 * Don't allow a filtered frame to live forever.
3400 if (bf->bf_state.bfs_retries > SWMAX_RETRIES) {
3401 sc->sc_stats.ast_tx_swretrymax++;
3402 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3403 "%s: bf=%p, seqno=%d, exceeded retries\n",
3406 bf->bf_state.bfs_seqno);
3411 * A busy buffer can't be added to the retry list.
3412 * It needs to be cloned.
3414 if (bf->bf_flags & ATH_BUF_BUSY) {
3415 nbf = ath_tx_retry_clone(sc, tid->an, tid, bf);
3416 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3417 "%s: busy buffer clone: %p -> %p\n",
3424 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3425 "%s: busy buffer couldn't be cloned (%p)!\n",
3429 ath_tx_tid_filt_comp_buf(sc, tid, nbf);
3432 ath_tx_tid_filt_comp_complete(sc, tid);
3438 ath_tx_tid_filt_comp_aggr(struct ath_softc *sc, struct ath_tid *tid,
3439 struct ath_buf *bf_first, ath_bufhead *bf_q)
3441 struct ath_buf *bf, *bf_next, *nbf;
3443 ATH_TX_LOCK_ASSERT(sc);
3447 bf_next = bf->bf_next;
3448 bf->bf_next = NULL; /* Remove it from the aggr list */
3451 * Don't allow a filtered frame to live forever.
3453 if (bf->bf_state.bfs_retries > SWMAX_RETRIES) {
3454 sc->sc_stats.ast_tx_swretrymax++;
3455 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3456 "%s: bf=%p, seqno=%d, exceeded retries\n",
3459 bf->bf_state.bfs_seqno);
3460 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
3464 if (bf->bf_flags & ATH_BUF_BUSY) {
3465 nbf = ath_tx_retry_clone(sc, tid->an, tid, bf);
3466 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3467 "%s: busy buffer cloned: %p -> %p",
3474 * If the buffer couldn't be cloned, add it to bf_q;
3475 * the caller will free the buffer(s) as required.
3478 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3479 "%s: buffer couldn't be cloned! (%p)\n",
3481 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
3483 ath_tx_tid_filt_comp_buf(sc, tid, nbf);
3489 ath_tx_tid_filt_comp_complete(sc, tid);
3493 * Suspend the queue because we need to TX a BAR.
3496 ath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid)
3499 ATH_TX_LOCK_ASSERT(sc);
3501 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3502 "%s: tid=%d, bar_wait=%d, bar_tx=%d, called\n",
3508 /* We shouldn't be called when bar_tx is 1 */
3510 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3511 "%s: bar_tx is 1?!\n", __func__);
3514 /* If we've already been called, just be patient. */
3521 /* Only one pause, no matter how many frames fail */
3522 ath_tx_tid_pause(sc, tid);
3526 * We've finished with BAR handling - either we succeeded or
3527 * failed. Either way, unsuspend TX.
3530 ath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid)
3533 ATH_TX_LOCK_ASSERT(sc);
3535 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3536 "%s: %6D: TID=%d, called\n",
3538 tid->an->an_node.ni_macaddr,
3542 if (tid->bar_tx == 0 || tid->bar_wait == 0) {
3543 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3544 "%s: %6D: TID=%d, bar_tx=%d, bar_wait=%d: ?\n",
3545 __func__, tid->an->an_node.ni_macaddr, ":",
3546 tid->tid, tid->bar_tx, tid->bar_wait);
3549 tid->bar_tx = tid->bar_wait = 0;
3550 ath_tx_tid_resume(sc, tid);
3554 * Return whether we're ready to TX a BAR frame.
3556 * Requires the TID lock be held.
3559 ath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid)
3562 ATH_TX_LOCK_ASSERT(sc);
3564 if (tid->bar_wait == 0 || tid->hwq_depth > 0)
3567 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3568 "%s: %6D: TID=%d, bar ready\n",
3570 tid->an->an_node.ni_macaddr,
3578 * Check whether the current TID is ready to have a BAR
3579 * TXed and if so, do the TX.
3581 * Since the TID/TXQ lock can't be held during a call to
3582 * ieee80211_send_bar(), we have to do the dirty thing of unlocking it,
3583 * sending the BAR and locking it again.
3585 * Eventually, the code to send the BAR should be broken out
3586 * from this routine so the lock doesn't have to be reacquired
3587 * just to be immediately dropped by the caller.
3590 ath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid)
3592 struct ieee80211_tx_ampdu *tap;
3594 ATH_TX_LOCK_ASSERT(sc);
3596 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3597 "%s: %6D: TID=%d, called\n",
3599 tid->an->an_node.ni_macaddr,
3603 tap = ath_tx_get_tx_tid(tid->an, tid->tid);
3606 * This is an error condition!
3608 if (tid->bar_wait == 0 || tid->bar_tx == 1) {
3609 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3610 "%s: %6D: TID=%d, bar_tx=%d, bar_wait=%d: ?\n",
3611 __func__, tid->an->an_node.ni_macaddr, ":",
3612 tid->tid, tid->bar_tx, tid->bar_wait);
3616 /* Don't do anything if we still have pending frames */
3617 if (tid->hwq_depth > 0) {
3618 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3619 "%s: %6D: TID=%d, hwq_depth=%d, waiting\n",
3621 tid->an->an_node.ni_macaddr,
3628 /* We're now about to TX */
3632 * Override the clrdmask configuration for the next frame,
3633 * just to get the ball rolling.
3635 ath_tx_set_clrdmask(sc, tid->an);
3638 * Calculate new BAW left edge, now that all frames have either
3639 * succeeded or failed.
3641 * XXX verify this is _actually_ the valid value to begin at!
3643 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3644 "%s: %6D: TID=%d, new BAW left edge=%d\n",
3646 tid->an->an_node.ni_macaddr,
3651 /* Try sending the BAR frame */
3652 /* We can't hold the lock here! */
3655 if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) {
3656 /* Success? Now we wait for notification that it's done */
3661 /* Failure? For now, warn loudly and continue */
3663 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3664 "%s: %6D: TID=%d, failed to TX BAR, continue!\n",
3665 __func__, tid->an->an_node.ni_macaddr, ":",
3667 ath_tx_tid_bar_unsuspend(sc, tid);
3671 ath_tx_tid_drain_pkt(struct ath_softc *sc, struct ath_node *an,
3672 struct ath_tid *tid, ath_bufhead *bf_cq, struct ath_buf *bf)
3675 ATH_TX_LOCK_ASSERT(sc);
3678 * If the current TID is running AMPDU, update
3681 if (ath_tx_ampdu_running(sc, an, tid->tid) &&
3682 bf->bf_state.bfs_dobaw) {
3684 * Only remove the frame from the BAW if it's
3685 * been transmitted at least once; this means
3686 * the frame was in the BAW to begin with.
3688 if (bf->bf_state.bfs_retries > 0) {
3689 ath_tx_update_baw(sc, an, tid, bf);
3690 bf->bf_state.bfs_dobaw = 0;
3694 * This has become a non-fatal error now
3696 if (! bf->bf_state.bfs_addedbaw)
3697 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW
3698 "%s: wasn't added: seqno %d\n",
3699 __func__, SEQNO(bf->bf_state.bfs_seqno));
3703 /* Strip it out of an aggregate list if it was in one */
3706 /* Insert on the free queue to be freed by the caller */
3707 TAILQ_INSERT_TAIL(bf_cq, bf, bf_list);
3711 ath_tx_tid_drain_print(struct ath_softc *sc, struct ath_node *an,
3712 const char *pfx, struct ath_tid *tid, struct ath_buf *bf)
3714 struct ieee80211_node *ni = &an->an_node;
3715 struct ath_txq *txq;
3716 struct ieee80211_tx_ampdu *tap;
3718 txq = sc->sc_ac2q[tid->ac];
3719 tap = ath_tx_get_tx_tid(an, tid->tid);
3721 DPRINTF(sc, ATH_DEBUG_SW_TX,
3722 "%s: %s: %6D: bf=%p: addbaw=%d, dobaw=%d, "
3723 "seqno=%d, retry=%d\n",
3729 bf->bf_state.bfs_addedbaw,
3730 bf->bf_state.bfs_dobaw,
3731 SEQNO(bf->bf_state.bfs_seqno),
3732 bf->bf_state.bfs_retries);
3733 DPRINTF(sc, ATH_DEBUG_SW_TX,
3734 "%s: %s: %6D: bf=%p: txq[%d] axq_depth=%d, axq_aggr_depth=%d\n",
3742 txq->axq_aggr_depth);
3743 DPRINTF(sc, ATH_DEBUG_SW_TX,
3744 "%s: %s: %6D: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d, "
3755 DPRINTF(sc, ATH_DEBUG_SW_TX,
3756 "%s: %s: %6D: tid %d: "
3757 "sched=%d, paused=%d, "
3758 "incomp=%d, baw_head=%d, "
3759 "baw_tail=%d txa_start=%d, ni_txseqs=%d\n",
3765 tid->sched, tid->paused,
3766 tid->incomp, tid->baw_head,
3767 tid->baw_tail, tap == NULL ? -1 : tap->txa_start,
3768 ni->ni_txseqs[tid->tid]);
3770 /* XXX Dump the frame, see what it is? */
3771 ieee80211_dump_pkt(ni->ni_ic,
3772 mtod(bf->bf_m, const uint8_t *),
3773 bf->bf_m->m_len, 0, -1);
3777 * Free any packets currently pending in the software TX queue.
3779 * This will be called when a node is being deleted.
3781 * It can also be called on an active node during an interface
3782 * reset or state transition.
3784 * (From Linux/reference):
3786 * TODO: For frame(s) that are in the retry state, we will reuse the
3787 * sequence number(s) without setting the retry bit. The
3788 * alternative is to give up on these and BAR the receiver's window
3792 ath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an,
3793 struct ath_tid *tid, ath_bufhead *bf_cq)
3796 struct ieee80211_tx_ampdu *tap;
3797 struct ieee80211_node *ni = &an->an_node;
3800 tap = ath_tx_get_tx_tid(an, tid->tid);
3802 ATH_TX_LOCK_ASSERT(sc);
3804 /* Walk the queue, free frames */
3807 bf = ATH_TID_FIRST(tid);
3813 ath_tx_tid_drain_print(sc, an, "norm", tid, bf);
3817 ATH_TID_REMOVE(tid, bf, bf_list);
3818 ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf);
3821 /* And now, drain the filtered frame queue */
3824 bf = ATH_TID_FILT_FIRST(tid);
3829 ath_tx_tid_drain_print(sc, an, "filt", tid, bf);
3833 ATH_TID_FILT_REMOVE(tid, bf, bf_list);
3834 ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf);
3838 * Override the clrdmask configuration for the next frame
3839 * in case there is some future transmission, just to get
3842 * This won't hurt things if the TID is about to be freed.
3844 ath_tx_set_clrdmask(sc, tid->an);
3847 * Now that it's completed, grab the TID lock and update
3848 * the sequence number and BAW window.
3849 * Because sequence numbers have been assigned to frames
3850 * that haven't been sent yet, it's entirely possible
3851 * we'll be called with some pending frames that have not
3854 * The cleaner solution is to do the sequence number allocation
3855 * when the packet is first transmitted - and thus the "retries"
3856 * check above would be enough to update the BAW/seqno.
3859 /* But don't do it for non-QoS TIDs */
3862 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
3863 "%s: %6D: node %p: TID %d: sliding BAW left edge to %d\n",
3871 ni->ni_txseqs[tid->tid] = tap->txa_start;
3872 tid->baw_tail = tid->baw_head;
3877 * Reset the TID state. This must be only called once the node has
3878 * had its frames flushed from this TID, to ensure that no other
3879 * pause / unpause logic can kick in.
3882 ath_tx_tid_reset(struct ath_softc *sc, struct ath_tid *tid)
3886 tid->bar_wait = tid->bar_tx = tid->isfiltered = 0;
3887 tid->paused = tid->sched = tid->addba_tx_pending = 0;
3888 tid->incomp = tid->cleanup_inprogress = 0;
3892 * If we have a bar_wait set, we need to unpause the TID
3893 * here. Otherwise once cleanup has finished, the TID won't
3894 * have the right paused counter.
3896 * XXX I'm not going through resume here - I don't want the
3897 * node to be rescheuled just yet. This however should be
3900 if (tid->bar_wait) {
3901 if (tid->paused > 0) {
3907 * XXX same with a currently filtered TID.
3909 * Since this is being called during a flush, we assume that
3910 * the filtered frame list is actually empty.
3912 * XXX TODO: add in a check to ensure that the filtered queue
3913 * depth is actually 0!
3915 if (tid->isfiltered) {
3916 if (tid->paused > 0) {
3922 * Clear BAR, filtered frames, scheduled and ADDBA pending.
3923 * The TID may be going through cleanup from the last association
3924 * where things in the BAW are still in the hardware queue.
3928 tid->isfiltered = 0;
3930 tid->addba_tx_pending = 0;
3933 * XXX TODO: it may just be enough to walk the HWQs and mark
3934 * frames for that node as non-aggregate; or mark the ath_node
3935 * with something that indicates that aggregation is no longer
3936 * occuring. Then we can just toss the BAW complaints and
3937 * do a complete hard reset of state here - no pause, no
3938 * complete counter, etc.
3944 * Flush all software queued packets for the given node.
3946 * This occurs when a completion handler frees the last buffer
3947 * for a node, and the node is thus freed. This causes the node
3948 * to be cleaned up, which ends up calling ath_tx_node_flush.
3951 ath_tx_node_flush(struct ath_softc *sc, struct ath_node *an)
3959 ATH_KTR(sc, ATH_KTR_NODE, 1, "ath_tx_node_flush: flush node; ni=%p",
3963 DPRINTF(sc, ATH_DEBUG_NODE,
3964 "%s: %6D: flush; is_powersave=%d, stack_psq=%d, tim=%d, "
3965 "swq_depth=%d, clrdmask=%d, leak_count=%d\n",
3967 an->an_node.ni_macaddr,
3969 an->an_is_powersave,
3976 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
3977 struct ath_tid *atid = &an->an_tid[tid];
3980 ath_tx_tid_drain(sc, an, atid, &bf_cq);
3982 /* Remove this tid from the list of active tids */
3983 ath_tx_tid_unsched(sc, atid);
3985 /* Reset the per-TID pause, BAR, etc state */
3986 ath_tx_tid_reset(sc, atid);
3990 * Clear global leak count
3992 an->an_leak_count = 0;
3995 /* Handle completed frames */
3996 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
3997 TAILQ_REMOVE(&bf_cq, bf, bf_list);
3998 ath_tx_default_comp(sc, bf, 0);
4003 * Drain all the software TXQs currently with traffic queued.
4006 ath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq)
4008 struct ath_tid *tid;
4016 * Iterate over all active tids for the given txq,
4017 * flushing and unsched'ing them
4019 while (! TAILQ_EMPTY(&txq->axq_tidq)) {
4020 tid = TAILQ_FIRST(&txq->axq_tidq);
4021 ath_tx_tid_drain(sc, tid->an, tid, &bf_cq);
4022 ath_tx_tid_unsched(sc, tid);
4027 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4028 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4029 ath_tx_default_comp(sc, bf, 0);
4034 * Handle completion of non-aggregate session frames.
4036 * This (currently) doesn't implement software retransmission of
4037 * non-aggregate frames!
4039 * Software retransmission of non-aggregate frames needs to obey
4040 * the strict sequence number ordering, and drop any frames that
4043 * For now, filtered frames and frame transmission will cause
4044 * all kinds of issues. So we don't support them.
4046 * So anyone queuing frames via ath_tx_normal_xmit() or
4047 * ath_tx_hw_queue_norm() must override and set CLRDMASK.
4050 ath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail)
4052 struct ieee80211_node *ni = bf->bf_node;
4053 struct ath_node *an = ATH_NODE(ni);
4054 int tid = bf->bf_state.bfs_tid;
4055 struct ath_tid *atid = &an->an_tid[tid];
4056 struct ath_tx_status *ts = &bf->bf_status.ds_txstat;
4058 /* The TID state is protected behind the TXQ lock */
4061 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n",
4062 __func__, bf, fail, atid->hwq_depth - 1);
4068 * If the frame was filtered, stick it on the filter frame
4069 * queue and complain about it. It shouldn't happen!
4071 if ((ts->ts_status & HAL_TXERR_FILT) ||
4072 (ts->ts_status != 0 && atid->isfiltered)) {
4073 DPRINTF(sc, ATH_DEBUG_SW_TX,
4074 "%s: isfiltered=%d, ts_status=%d: huh?\n",
4078 ath_tx_tid_filt_comp_buf(sc, atid, bf);
4081 if (atid->isfiltered)
4082 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: filtered?!\n", __func__);
4083 if (atid->hwq_depth < 0)
4084 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: hwq_depth < 0: %d\n",
4085 __func__, atid->hwq_depth);
4088 * If the queue is filtered, potentially mark it as complete
4089 * and reschedule it as needed.
4091 * This is required as there may be a subsequent TX descriptor
4092 * for this end-node that has CLRDMASK set, so it's quite possible
4093 * that a filtered frame will be followed by a non-filtered
4094 * (complete or otherwise) frame.
4096 * XXX should we do this before we complete the frame?
4098 if (atid->isfiltered)
4099 ath_tx_tid_filt_comp_complete(sc, atid);
4103 * punt to rate control if we're not being cleaned up
4104 * during a hw queue drain and the frame wanted an ACK.
4106 if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0))
4107 ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc,
4108 ts, bf->bf_state.bfs_pktlen,
4109 1, (ts->ts_status == 0) ? 0 : 1);
4111 ath_tx_default_comp(sc, bf, fail);
4115 * Handle cleanup of aggregate session packets that aren't
4118 * There's no need to update the BAW here - the session is being
4122 ath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf)
4124 struct ieee80211_node *ni = bf->bf_node;
4125 struct ath_node *an = ATH_NODE(ni);
4126 int tid = bf->bf_state.bfs_tid;
4127 struct ath_tid *atid = &an->an_tid[tid];
4129 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n",
4130 __func__, tid, atid->incomp);
4134 if (atid->incomp == 0) {
4135 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4136 "%s: TID %d: cleaned up! resume!\n",
4138 atid->cleanup_inprogress = 0;
4139 ath_tx_tid_resume(sc, atid);
4143 ath_tx_default_comp(sc, bf, 0);
4147 * Performs transmit side cleanup when TID changes from aggregated to
4150 * - Discard all retry frames from the s/w queue.
4151 * - Fix the tx completion function for all buffers in s/w queue.
4152 * - Count the number of unacked frames, and let transmit completion
4155 * The caller is responsible for pausing the TID and unpausing the
4156 * TID if no cleanup was required. Otherwise the cleanup path will
4157 * unpause the TID once the last hardware queued frame is completed.
4160 ath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid,
4163 struct ath_tid *atid = &an->an_tid[tid];
4164 struct ieee80211_tx_ampdu *tap;
4165 struct ath_buf *bf, *bf_next;
4167 ATH_TX_LOCK_ASSERT(sc);
4169 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4170 "%s: TID %d: called\n", __func__, tid);
4173 * Move the filtered frames to the TX queue, before
4174 * we run off and discard/process things.
4176 /* XXX this is really quite inefficient */
4177 while ((bf = ATH_TID_FILT_LAST(atid, ath_bufhead_s)) != NULL) {
4178 ATH_TID_FILT_REMOVE(atid, bf, bf_list);
4179 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4183 * Update the frames in the software TX queue:
4185 * + Discard retry frames in the queue
4186 * + Fix the completion function to be non-aggregate
4188 bf = ATH_TID_FIRST(atid);
4190 if (bf->bf_state.bfs_isretried) {
4191 bf_next = TAILQ_NEXT(bf, bf_list);
4192 ATH_TID_REMOVE(atid, bf, bf_list);
4193 if (bf->bf_state.bfs_dobaw) {
4194 ath_tx_update_baw(sc, an, atid, bf);
4195 if (!bf->bf_state.bfs_addedbaw)
4196 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4197 "%s: wasn't added: seqno %d\n",
4199 SEQNO(bf->bf_state.bfs_seqno));
4201 bf->bf_state.bfs_dobaw = 0;
4203 * Call the default completion handler with "fail" just
4204 * so upper levels are suitably notified about this.
4206 TAILQ_INSERT_TAIL(bf_cq, bf, bf_list);
4210 /* Give these the default completion handler */
4211 bf->bf_comp = ath_tx_normal_comp;
4212 bf = TAILQ_NEXT(bf, bf_list);
4216 * Calculate what hardware-queued frames exist based
4217 * on the current BAW size. Ie, what frames have been
4218 * added to the TX hardware queue for this TID but
4221 tap = ath_tx_get_tx_tid(an, tid);
4222 /* Need the lock - fiddling with BAW */
4223 while (atid->baw_head != atid->baw_tail) {
4224 if (atid->tx_buf[atid->baw_head]) {
4226 atid->cleanup_inprogress = 1;
4227 atid->tx_buf[atid->baw_head] = NULL;
4229 INCR(atid->baw_head, ATH_TID_MAX_BUFS);
4230 INCR(tap->txa_start, IEEE80211_SEQ_RANGE);
4233 if (atid->cleanup_inprogress)
4234 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4235 "%s: TID %d: cleanup needed: %d packets\n",
4236 __func__, tid, atid->incomp);
4238 /* Owner now must free completed frames */
4241 static struct ath_buf *
4242 ath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an,
4243 struct ath_tid *tid, struct ath_buf *bf)
4245 struct ath_buf *nbf;
4249 * Clone the buffer. This will handle the dma unmap and
4250 * copy the node reference to the new buffer. If this
4251 * works out, 'bf' will have no DMA mapping, no mbuf
4252 * pointer and no node reference.
4254 nbf = ath_buf_clone(sc, bf);
4257 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: ATH_BUF_BUSY; cloning\n",
4262 /* Failed to clone */
4263 DPRINTF(sc, ATH_DEBUG_XMIT,
4264 "%s: failed to clone a busy buffer\n",
4269 /* Setup the dma for the new buffer */
4270 error = ath_tx_dmasetup(sc, nbf, nbf->bf_m);
4272 DPRINTF(sc, ATH_DEBUG_XMIT,
4273 "%s: failed to setup dma for clone\n",
4276 * Put this at the head of the list, not tail;
4277 * that way it doesn't interfere with the
4278 * busy buffer logic (which uses the tail of
4282 ath_returnbuf_head(sc, nbf);
4283 ATH_TXBUF_UNLOCK(sc);
4287 /* Update BAW if required, before we free the original buf */
4288 if (bf->bf_state.bfs_dobaw)
4289 ath_tx_switch_baw_buf(sc, an, tid, bf, nbf);
4291 /* Free original buffer; return new buffer */
4292 ath_freebuf(sc, bf);
4298 * Handle retrying an unaggregate frame in an aggregate
4301 * If too many retries occur, pause the TID, wait for
4302 * any further retransmits (as there's no reason why
4303 * non-aggregate frames in an aggregate session are
4304 * transmitted in-order; they just have to be in-BAW)
4305 * and then queue a BAR.
4308 ath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf)
4310 struct ieee80211_node *ni = bf->bf_node;
4311 struct ath_node *an = ATH_NODE(ni);
4312 int tid = bf->bf_state.bfs_tid;
4313 struct ath_tid *atid = &an->an_tid[tid];
4314 struct ieee80211_tx_ampdu *tap;
4318 tap = ath_tx_get_tx_tid(an, tid);
4321 * If the buffer is marked as busy, we can't directly
4322 * reuse it. Instead, try to clone the buffer.
4323 * If the clone is successful, recycle the old buffer.
4324 * If the clone is unsuccessful, set bfs_retries to max
4325 * to force the next bit of code to free the buffer
4328 if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) &&
4329 (bf->bf_flags & ATH_BUF_BUSY)) {
4330 struct ath_buf *nbf;
4331 nbf = ath_tx_retry_clone(sc, an, atid, bf);
4333 /* bf has been freed at this point */
4336 bf->bf_state.bfs_retries = SWMAX_RETRIES + 1;
4339 if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) {
4340 DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES,
4341 "%s: exceeded retries; seqno %d\n",
4342 __func__, SEQNO(bf->bf_state.bfs_seqno));
4343 sc->sc_stats.ast_tx_swretrymax++;
4345 /* Update BAW anyway */
4346 if (bf->bf_state.bfs_dobaw) {
4347 ath_tx_update_baw(sc, an, atid, bf);
4348 if (! bf->bf_state.bfs_addedbaw)
4349 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4350 "%s: wasn't added: seqno %d\n",
4351 __func__, SEQNO(bf->bf_state.bfs_seqno));
4353 bf->bf_state.bfs_dobaw = 0;
4355 /* Suspend the TX queue and get ready to send the BAR */
4356 ath_tx_tid_bar_suspend(sc, atid);
4358 /* Send the BAR if there are no other frames waiting */
4359 if (ath_tx_tid_bar_tx_ready(sc, atid))
4360 ath_tx_tid_bar_tx(sc, atid);
4364 /* Free buffer, bf is free after this call */
4365 ath_tx_default_comp(sc, bf, 0);
4370 * This increments the retry counter as well as
4371 * sets the retry flag in the ath_buf and packet
4374 ath_tx_set_retry(sc, bf);
4375 sc->sc_stats.ast_tx_swretries++;
4378 * Insert this at the head of the queue, so it's
4379 * retried before any current/subsequent frames.
4381 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4382 ath_tx_tid_sched(sc, atid);
4383 /* Send the BAR if there are no other frames waiting */
4384 if (ath_tx_tid_bar_tx_ready(sc, atid))
4385 ath_tx_tid_bar_tx(sc, atid);
4391 * Common code for aggregate excessive retry/subframe retry.
4392 * If retrying, queues buffers to bf_q. If not, frees the
4395 * XXX should unify this with ath_tx_aggr_retry_unaggr()
4398 ath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf,
4401 struct ieee80211_node *ni = bf->bf_node;
4402 struct ath_node *an = ATH_NODE(ni);
4403 int tid = bf->bf_state.bfs_tid;
4404 struct ath_tid *atid = &an->an_tid[tid];
4406 ATH_TX_LOCK_ASSERT(sc);
4408 /* XXX clr11naggr should be done for all subframes */
4409 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
4410 ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0);
4412 /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */
4415 * If the buffer is marked as busy, we can't directly
4416 * reuse it. Instead, try to clone the buffer.
4417 * If the clone is successful, recycle the old buffer.
4418 * If the clone is unsuccessful, set bfs_retries to max
4419 * to force the next bit of code to free the buffer
4422 if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) &&
4423 (bf->bf_flags & ATH_BUF_BUSY)) {
4424 struct ath_buf *nbf;
4425 nbf = ath_tx_retry_clone(sc, an, atid, bf);
4427 /* bf has been freed at this point */
4430 bf->bf_state.bfs_retries = SWMAX_RETRIES + 1;
4433 if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) {
4434 sc->sc_stats.ast_tx_swretrymax++;
4435 DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES,
4436 "%s: max retries: seqno %d\n",
4437 __func__, SEQNO(bf->bf_state.bfs_seqno));
4438 ath_tx_update_baw(sc, an, atid, bf);
4439 if (!bf->bf_state.bfs_addedbaw)
4440 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4441 "%s: wasn't added: seqno %d\n",
4442 __func__, SEQNO(bf->bf_state.bfs_seqno));
4443 bf->bf_state.bfs_dobaw = 0;
4447 ath_tx_set_retry(sc, bf);
4448 sc->sc_stats.ast_tx_swretries++;
4449 bf->bf_next = NULL; /* Just to make sure */
4451 /* Clear the aggregate state */
4452 bf->bf_state.bfs_aggr = 0;
4453 bf->bf_state.bfs_ndelim = 0; /* ??? needed? */
4454 bf->bf_state.bfs_nframes = 1;
4456 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
4461 * error pkt completion for an aggregate destination
4464 ath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first,
4465 struct ath_tid *tid)
4467 struct ieee80211_node *ni = bf_first->bf_node;
4468 struct ath_node *an = ATH_NODE(ni);
4469 struct ath_buf *bf_next, *bf;
4472 struct ieee80211_tx_ampdu *tap;
4479 * Update rate control - all frames have failed.
4481 * XXX use the length in the first frame in the series;
4482 * XXX just so things are consistent for now.
4484 ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc,
4485 &bf_first->bf_status.ds_txstat,
4486 bf_first->bf_state.bfs_pktlen,
4487 bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes);
4490 tap = ath_tx_get_tx_tid(an, tid->tid);
4491 sc->sc_stats.ast_tx_aggr_failall++;
4493 /* Retry all subframes */
4496 bf_next = bf->bf_next;
4497 bf->bf_next = NULL; /* Remove it from the aggr list */
4498 sc->sc_stats.ast_tx_aggr_fail++;
4499 if (ath_tx_retry_subframe(sc, bf, &bf_q)) {
4502 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4507 /* Prepend all frames to the beginning of the queue */
4508 while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) {
4509 TAILQ_REMOVE(&bf_q, bf, bf_list);
4510 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
4514 * Schedule the TID to be re-tried.
4516 ath_tx_tid_sched(sc, tid);
4519 * send bar if we dropped any frames
4521 * Keep the txq lock held for now, as we need to ensure
4522 * that ni_txseqs[] is consistent (as it's being updated
4523 * in the ifnet TX context or raw TX context.)
4526 /* Suspend the TX queue and get ready to send the BAR */
4527 ath_tx_tid_bar_suspend(sc, tid);
4531 * Send BAR if required
4533 if (ath_tx_tid_bar_tx_ready(sc, tid))
4534 ath_tx_tid_bar_tx(sc, tid);
4538 /* Complete frames which errored out */
4539 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4540 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4541 ath_tx_default_comp(sc, bf, 0);
4546 * Handle clean-up of packets from an aggregate list.
4548 * There's no need to update the BAW here - the session is being
4552 ath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first)
4554 struct ath_buf *bf, *bf_next;
4555 struct ieee80211_node *ni = bf_first->bf_node;
4556 struct ath_node *an = ATH_NODE(ni);
4557 int tid = bf_first->bf_state.bfs_tid;
4558 struct ath_tid *atid = &an->an_tid[tid];
4569 if (atid->incomp == 0) {
4570 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4571 "%s: TID %d: cleaned up! resume!\n",
4573 atid->cleanup_inprogress = 0;
4574 ath_tx_tid_resume(sc, atid);
4577 /* Send BAR if required */
4578 /* XXX why would we send a BAR when transitioning to non-aggregation? */
4580 * XXX TODO: we should likely just tear down the BAR state here,
4581 * rather than sending a BAR.
4583 if (ath_tx_tid_bar_tx_ready(sc, atid))
4584 ath_tx_tid_bar_tx(sc, atid);
4588 /* Handle frame completion */
4591 bf_next = bf->bf_next;
4592 ath_tx_default_comp(sc, bf, 1);
4598 * Handle completion of an set of aggregate frames.
4600 * Note: the completion handler is the last descriptor in the aggregate,
4601 * not the last descriptor in the first frame.
4604 ath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first,
4607 //struct ath_desc *ds = bf->bf_lastds;
4608 struct ieee80211_node *ni = bf_first->bf_node;
4609 struct ath_node *an = ATH_NODE(ni);
4610 int tid = bf_first->bf_state.bfs_tid;
4611 struct ath_tid *atid = &an->an_tid[tid];
4612 struct ath_tx_status ts;
4613 struct ieee80211_tx_ampdu *tap;
4619 struct ath_buf *bf, *bf_next;
4622 int nframes = 0, nbad = 0, nf;
4624 /* XXX there's too much on the stack? */
4625 struct ath_rc_series rc[ATH_RC_NUM];
4628 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n",
4629 __func__, atid->hwq_depth);
4632 * Take a copy; this may be needed -after- bf_first
4633 * has been completed and freed.
4635 ts = bf_first->bf_status.ds_txstat;
4640 /* The TID state is kept behind the TXQ lock */
4644 if (atid->hwq_depth < 0)
4645 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: hwq_depth < 0: %d\n",
4646 __func__, atid->hwq_depth);
4649 * If the TID is filtered, handle completing the filter
4650 * transition before potentially kicking it to the cleanup
4653 * XXX this is duplicate work, ew.
4655 if (atid->isfiltered)
4656 ath_tx_tid_filt_comp_complete(sc, atid);
4659 * Punt cleanup to the relevant function, not our problem now
4661 if (atid->cleanup_inprogress) {
4662 if (atid->isfiltered)
4663 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4664 "%s: isfiltered=1, normal_comp?\n",
4667 ath_tx_comp_cleanup_aggr(sc, bf_first);
4672 * If the frame is filtered, transition to filtered frame
4673 * mode and add this to the filtered frame list.
4675 * XXX TODO: figure out how this interoperates with
4676 * BAR, pause and cleanup states.
4678 if ((ts.ts_status & HAL_TXERR_FILT) ||
4679 (ts.ts_status != 0 && atid->isfiltered)) {
4681 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4682 "%s: isfiltered=1, fail=%d\n", __func__, fail);
4683 ath_tx_tid_filt_comp_aggr(sc, atid, bf_first, &bf_cq);
4685 /* Remove from BAW */
4686 TAILQ_FOREACH_SAFE(bf, &bf_cq, bf_list, bf_next) {
4687 if (bf->bf_state.bfs_addedbaw)
4689 if (bf->bf_state.bfs_dobaw) {
4690 ath_tx_update_baw(sc, an, atid, bf);
4691 if (!bf->bf_state.bfs_addedbaw)
4692 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4693 "%s: wasn't added: seqno %d\n",
4695 SEQNO(bf->bf_state.bfs_seqno));
4697 bf->bf_state.bfs_dobaw = 0;
4700 * If any intermediate frames in the BAW were dropped when
4701 * handling filtering things, send a BAR.
4704 ath_tx_tid_bar_suspend(sc, atid);
4707 * Finish up by sending a BAR if required and freeing
4708 * the frames outside of the TX lock.
4710 goto finish_send_bar;
4714 * XXX for now, use the first frame in the aggregate for
4715 * XXX rate control completion; it's at least consistent.
4717 pktlen = bf_first->bf_state.bfs_pktlen;
4720 * Handle errors first!
4722 * Here, handle _any_ error as a "exceeded retries" error.
4723 * Later on (when filtered frames are to be specially handled)
4724 * it'll have to be expanded.
4727 if (ts.ts_status & HAL_TXERR_XRETRY) {
4729 if (ts.ts_status != 0) {
4731 ath_tx_comp_aggr_error(sc, bf_first, atid);
4735 tap = ath_tx_get_tx_tid(an, tid);
4738 * extract starting sequence and block-ack bitmap
4740 /* XXX endian-ness of seq_st, ba? */
4741 seq_st = ts.ts_seqnum;
4742 hasba = !! (ts.ts_flags & HAL_TX_BA);
4743 tx_ok = (ts.ts_status == 0);
4744 isaggr = bf_first->bf_state.bfs_aggr;
4745 ba[0] = ts.ts_ba_low;
4746 ba[1] = ts.ts_ba_high;
4749 * Copy the TX completion status and the rate control
4750 * series from the first descriptor, as it may be freed
4751 * before the rate control code can get its grubby fingers
4754 memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc));
4756 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4757 "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, "
4758 "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n",
4759 __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags,
4760 isaggr, seq_st, hasba, ba[0], ba[1]);
4763 * The reference driver doesn't do this; it simply ignores
4764 * this check in its entirety.
4766 * I've seen this occur when using iperf to send traffic
4767 * out tid 1 - the aggregate frames are all marked as TID 1,
4768 * but the TXSTATUS has TID=0. So, let's just ignore this
4772 /* Occasionally, the MAC sends a tx status for the wrong TID. */
4773 if (tid != ts.ts_tid) {
4774 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: tid %d != hw tid %d\n",
4775 __func__, tid, ts.ts_tid);
4780 /* AR5416 BA bug; this requires an interface reset */
4781 if (isaggr && tx_ok && (! hasba)) {
4782 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4783 "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, "
4785 __func__, hasba, tx_ok, isaggr, seq_st);
4786 /* XXX TODO: schedule an interface reset */
4788 ath_printtxbuf(sc, bf_first,
4789 sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0);
4794 * Walk the list of frames, figure out which ones were correctly
4795 * sent and which weren't.
4798 nf = bf_first->bf_state.bfs_nframes;
4800 /* bf_first is going to be invalid once this list is walked */
4804 * Walk the list of completed frames and determine
4805 * which need to be completed and which need to be
4808 * For completed frames, the completion functions need
4809 * to be called at the end of this function as the last
4810 * node reference may free the node.
4812 * Finally, since the TXQ lock can't be held during the
4813 * completion callback (to avoid lock recursion),
4814 * the completion calls have to be done outside of the
4819 ba_index = ATH_BA_INDEX(seq_st,
4820 SEQNO(bf->bf_state.bfs_seqno));
4821 bf_next = bf->bf_next;
4822 bf->bf_next = NULL; /* Remove it from the aggr list */
4824 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4825 "%s: checking bf=%p seqno=%d; ack=%d\n",
4826 __func__, bf, SEQNO(bf->bf_state.bfs_seqno),
4827 ATH_BA_ISSET(ba, ba_index));
4829 if (tx_ok && ATH_BA_ISSET(ba, ba_index)) {
4830 sc->sc_stats.ast_tx_aggr_ok++;
4831 ath_tx_update_baw(sc, an, atid, bf);
4832 bf->bf_state.bfs_dobaw = 0;
4833 if (!bf->bf_state.bfs_addedbaw)
4834 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4835 "%s: wasn't added: seqno %d\n",
4836 __func__, SEQNO(bf->bf_state.bfs_seqno));
4838 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4840 sc->sc_stats.ast_tx_aggr_fail++;
4841 if (ath_tx_retry_subframe(sc, bf, &bf_q)) {
4844 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4852 * Now that the BAW updates have been done, unlock
4854 * txseq is grabbed before the lock is released so we
4855 * have a consistent view of what -was- in the BAW.
4856 * Anything after this point will not yet have been
4859 txseq = tap->txa_start;
4863 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4864 "%s: num frames seen=%d; bf nframes=%d\n",
4865 __func__, nframes, nf);
4868 * Now we know how many frames were bad, call the rate
4872 ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes,
4876 * send bar if we dropped any frames
4879 /* Suspend the TX queue and get ready to send the BAR */
4881 ath_tx_tid_bar_suspend(sc, atid);
4885 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4886 "%s: txa_start now %d\n", __func__, tap->txa_start);
4890 /* Prepend all frames to the beginning of the queue */
4891 while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) {
4892 TAILQ_REMOVE(&bf_q, bf, bf_list);
4893 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4897 * Reschedule to grab some further frames.
4899 ath_tx_tid_sched(sc, atid);
4902 * If the queue is filtered, re-schedule as required.
4904 * This is required as there may be a subsequent TX descriptor
4905 * for this end-node that has CLRDMASK set, so it's quite possible
4906 * that a filtered frame will be followed by a non-filtered
4907 * (complete or otherwise) frame.
4909 * XXX should we do this before we complete the frame?
4911 if (atid->isfiltered)
4912 ath_tx_tid_filt_comp_complete(sc, atid);
4917 * Send BAR if required
4919 if (ath_tx_tid_bar_tx_ready(sc, atid))
4920 ath_tx_tid_bar_tx(sc, atid);
4924 /* Do deferred completion */
4925 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4926 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4927 ath_tx_default_comp(sc, bf, 0);
4932 * Handle completion of unaggregated frames in an ADDBA
4935 * Fail is set to 1 if the entry is being freed via a call to
4936 * ath_tx_draintxq().
4939 ath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail)
4941 struct ieee80211_node *ni = bf->bf_node;
4942 struct ath_node *an = ATH_NODE(ni);
4943 int tid = bf->bf_state.bfs_tid;
4944 struct ath_tid *atid = &an->an_tid[tid];
4945 struct ath_tx_status ts;
4949 * Take a copy of this; filtering/cloning the frame may free the
4952 ts = bf->bf_status.ds_txstat;
4955 * Update rate control status here, before we possibly
4956 * punt to retry or cleanup.
4958 * Do it outside of the TXQ lock.
4960 if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0))
4961 ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc,
4962 &bf->bf_status.ds_txstat,
4963 bf->bf_state.bfs_pktlen,
4964 1, (ts.ts_status == 0) ? 0 : 1);
4967 * This is called early so atid->hwq_depth can be tracked.
4968 * This unfortunately means that it's released and regrabbed
4969 * during retry and cleanup. That's rather inefficient.
4973 if (tid == IEEE80211_NONQOS_TID)
4974 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=16!\n", __func__);
4976 DPRINTF(sc, ATH_DEBUG_SW_TX,
4977 "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n",
4978 __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth,
4979 SEQNO(bf->bf_state.bfs_seqno));
4982 if (atid->hwq_depth < 0)
4983 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: hwq_depth < 0: %d\n",
4984 __func__, atid->hwq_depth);
4987 * If the TID is filtered, handle completing the filter
4988 * transition before potentially kicking it to the cleanup
4991 if (atid->isfiltered)
4992 ath_tx_tid_filt_comp_complete(sc, atid);
4995 * If a cleanup is in progress, punt to comp_cleanup;
4996 * rather than handling it here. It's thus their
4997 * responsibility to clean up, call the completion
4998 * function in net80211, etc.
5000 if (atid->cleanup_inprogress) {
5001 if (atid->isfiltered)
5002 DPRINTF(sc, ATH_DEBUG_SW_TX,
5003 "%s: isfiltered=1, normal_comp?\n",
5006 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n",
5008 ath_tx_comp_cleanup_unaggr(sc, bf);
5013 * XXX TODO: how does cleanup, BAR and filtered frame handling
5016 * If the frame is filtered OR if it's any failure but
5017 * the TID is filtered, the frame must be added to the
5018 * filtered frame list.
5020 * However - a busy buffer can't be added to the filtered
5021 * list as it will end up being recycled without having
5022 * been made available for the hardware.
5024 if ((ts.ts_status & HAL_TXERR_FILT) ||
5025 (ts.ts_status != 0 && atid->isfiltered)) {
5029 DPRINTF(sc, ATH_DEBUG_SW_TX,
5030 "%s: isfiltered=1, fail=%d\n",
5032 freeframe = ath_tx_tid_filt_comp_single(sc, atid, bf);
5034 /* Remove from BAW */
5035 if (bf->bf_state.bfs_addedbaw)
5037 if (bf->bf_state.bfs_dobaw) {
5038 ath_tx_update_baw(sc, an, atid, bf);
5039 if (!bf->bf_state.bfs_addedbaw)
5040 DPRINTF(sc, ATH_DEBUG_SW_TX,
5041 "%s: wasn't added: seqno %d\n",
5042 __func__, SEQNO(bf->bf_state.bfs_seqno));
5044 bf->bf_state.bfs_dobaw = 0;
5048 * If the frame couldn't be filtered, treat it as a drop and
5049 * prepare to send a BAR.
5051 if (freeframe && drops)
5052 ath_tx_tid_bar_suspend(sc, atid);
5055 * Send BAR if required
5057 if (ath_tx_tid_bar_tx_ready(sc, atid))
5058 ath_tx_tid_bar_tx(sc, atid);
5062 * If freeframe is set, then the frame couldn't be
5063 * cloned and bf is still valid. Just complete/free it.
5066 ath_tx_default_comp(sc, bf, fail);
5072 * Don't bother with the retry check if all frames
5073 * are being failed (eg during queue deletion.)
5076 if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) {
5078 if (fail == 0 && ts.ts_status != 0) {
5080 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n",
5082 ath_tx_aggr_retry_unaggr(sc, bf);
5086 /* Success? Complete */
5087 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n",
5088 __func__, tid, SEQNO(bf->bf_state.bfs_seqno));
5089 if (bf->bf_state.bfs_dobaw) {
5090 ath_tx_update_baw(sc, an, atid, bf);
5091 bf->bf_state.bfs_dobaw = 0;
5092 if (!bf->bf_state.bfs_addedbaw)
5093 DPRINTF(sc, ATH_DEBUG_SW_TX,
5094 "%s: wasn't added: seqno %d\n",
5095 __func__, SEQNO(bf->bf_state.bfs_seqno));
5099 * If the queue is filtered, re-schedule as required.
5101 * This is required as there may be a subsequent TX descriptor
5102 * for this end-node that has CLRDMASK set, so it's quite possible
5103 * that a filtered frame will be followed by a non-filtered
5104 * (complete or otherwise) frame.
5106 * XXX should we do this before we complete the frame?
5108 if (atid->isfiltered)
5109 ath_tx_tid_filt_comp_complete(sc, atid);
5112 * Send BAR if required
5114 if (ath_tx_tid_bar_tx_ready(sc, atid))
5115 ath_tx_tid_bar_tx(sc, atid);
5119 ath_tx_default_comp(sc, bf, fail);
5120 /* bf is freed at this point */
5124 ath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail)
5126 if (bf->bf_state.bfs_aggr)
5127 ath_tx_aggr_comp_aggr(sc, bf, fail);
5129 ath_tx_aggr_comp_unaggr(sc, bf, fail);
5133 * Schedule some packets from the given node/TID to the hardware.
5135 * This is the aggregate version.
5138 ath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an,
5139 struct ath_tid *tid)
5142 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
5143 struct ieee80211_tx_ampdu *tap;
5144 ATH_AGGR_STATUS status;
5147 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid);
5148 ATH_TX_LOCK_ASSERT(sc);
5151 * XXX TODO: If we're called for a queue that we're leaking frames to,
5152 * ensure we only leak one.
5155 tap = ath_tx_get_tx_tid(an, tid->tid);
5157 if (tid->tid == IEEE80211_NONQOS_TID)
5158 DPRINTF(sc, ATH_DEBUG_SW_TX,
5159 "%s: called for TID=NONQOS_TID?\n", __func__);
5162 status = ATH_AGGR_DONE;
5165 * If the upper layer has paused the TID, don't
5166 * queue any further packets.
5168 * This can also occur from the completion task because
5169 * of packet loss; but as its serialised with this code,
5170 * it won't "appear" half way through queuing packets.
5172 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
5175 bf = ATH_TID_FIRST(tid);
5181 * If the packet doesn't fall within the BAW (eg a NULL
5182 * data frame), schedule it directly; continue.
5184 if (! bf->bf_state.bfs_dobaw) {
5185 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5186 "%s: non-baw packet\n",
5188 ATH_TID_REMOVE(tid, bf, bf_list);
5190 if (bf->bf_state.bfs_nframes > 1)
5191 DPRINTF(sc, ATH_DEBUG_SW_TX,
5192 "%s: aggr=%d, nframes=%d\n",
5194 bf->bf_state.bfs_aggr,
5195 bf->bf_state.bfs_nframes);
5198 * This shouldn't happen - such frames shouldn't
5199 * ever have been queued as an aggregate in the
5200 * first place. However, make sure the fields
5201 * are correctly setup just to be totally sure.
5203 bf->bf_state.bfs_aggr = 0;
5204 bf->bf_state.bfs_nframes = 1;
5206 /* Update CLRDMASK just before this frame is queued */
5207 ath_tx_update_clrdmask(sc, tid, bf);
5209 ath_tx_do_ratelookup(sc, bf);
5210 ath_tx_calc_duration(sc, bf);
5211 ath_tx_calc_protection(sc, bf);
5212 ath_tx_set_rtscts(sc, bf);
5213 ath_tx_rate_fill_rcflags(sc, bf);
5214 ath_tx_setds(sc, bf);
5215 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
5217 sc->sc_aggr_stats.aggr_nonbaw_pkt++;
5219 /* Queue the packet; continue */
5226 * Do a rate control lookup on the first frame in the
5227 * list. The rate control code needs that to occur
5228 * before it can determine whether to TX.
5229 * It's inaccurate because the rate control code doesn't
5230 * really "do" aggregate lookups, so it only considers
5231 * the size of the first frame.
5233 ath_tx_do_ratelookup(sc, bf);
5234 bf->bf_state.bfs_rc[3].rix = 0;
5235 bf->bf_state.bfs_rc[3].tries = 0;
5237 ath_tx_calc_duration(sc, bf);
5238 ath_tx_calc_protection(sc, bf);
5240 ath_tx_set_rtscts(sc, bf);
5241 ath_tx_rate_fill_rcflags(sc, bf);
5243 status = ath_tx_form_aggr(sc, an, tid, &bf_q);
5245 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5246 "%s: ath_tx_form_aggr() status=%d\n", __func__, status);
5249 * No frames to be picked up - out of BAW
5251 if (TAILQ_EMPTY(&bf_q))
5255 * This assumes that the descriptor list in the ath_bufhead
5256 * are already linked together via bf_next pointers.
5258 bf = TAILQ_FIRST(&bf_q);
5260 if (status == ATH_AGGR_8K_LIMITED)
5261 sc->sc_aggr_stats.aggr_rts_aggr_limited++;
5264 * If it's the only frame send as non-aggregate
5265 * assume that ath_tx_form_aggr() has checked
5266 * whether it's in the BAW and added it appropriately.
5268 if (bf->bf_state.bfs_nframes == 1) {
5269 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5270 "%s: single-frame aggregate\n", __func__);
5272 /* Update CLRDMASK just before this frame is queued */
5273 ath_tx_update_clrdmask(sc, tid, bf);
5275 bf->bf_state.bfs_aggr = 0;
5276 bf->bf_state.bfs_ndelim = 0;
5277 ath_tx_setds(sc, bf);
5278 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
5279 if (status == ATH_AGGR_BAW_CLOSED)
5280 sc->sc_aggr_stats.aggr_baw_closed_single_pkt++;
5282 sc->sc_aggr_stats.aggr_single_pkt++;
5284 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5285 "%s: multi-frame aggregate: %d frames, "
5287 __func__, bf->bf_state.bfs_nframes,
5288 bf->bf_state.bfs_al);
5289 bf->bf_state.bfs_aggr = 1;
5290 sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++;
5291 sc->sc_aggr_stats.aggr_aggr_pkt++;
5293 /* Update CLRDMASK just before this frame is queued */
5294 ath_tx_update_clrdmask(sc, tid, bf);
5297 * Calculate the duration/protection as required.
5299 ath_tx_calc_duration(sc, bf);
5300 ath_tx_calc_protection(sc, bf);
5303 * Update the rate and rtscts information based on the
5304 * rate decision made by the rate control code;
5305 * the first frame in the aggregate needs it.
5307 ath_tx_set_rtscts(sc, bf);
5310 * Setup the relevant descriptor fields
5311 * for aggregation. The first descriptor
5312 * already points to the rest in the chain.
5314 ath_tx_setds_11n(sc, bf);
5318 /* Set completion handler, multi-frame aggregate or not */
5319 bf->bf_comp = ath_tx_aggr_comp;
5321 if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID)
5322 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=16?\n", __func__);
5325 * Update leak count and frame config if were leaking frames.
5327 * XXX TODO: it should update all frames in an aggregate
5330 ath_tx_leak_count_update(sc, tid, bf);
5333 ath_tx_handoff(sc, txq, bf);
5335 /* Track outstanding buffer count to hardware */
5336 /* aggregates are "one" buffer */
5340 * Break out if ath_tx_form_aggr() indicated
5341 * there can't be any further progress (eg BAW is full.)
5342 * Checking for an empty txq is done above.
5344 * XXX locking on txq here?
5346 /* XXX TXQ locking */
5347 if (txq->axq_aggr_depth >= sc->sc_hwq_limit_aggr ||
5348 (status == ATH_AGGR_BAW_CLOSED ||
5349 status == ATH_AGGR_LEAK_CLOSED))
5355 * Schedule some packets from the given node/TID to the hardware.
5357 * XXX TODO: this routine doesn't enforce the maximum TXQ depth.
5358 * It just dumps frames into the TXQ. We should limit how deep
5359 * the transmit queue can grow for frames dispatched to the given
5362 * To avoid locking issues, either we need to own the TXQ lock
5363 * at this point, or we need to pass in the maximum frame count
5367 ath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an,
5368 struct ath_tid *tid)
5371 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
5373 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n",
5374 __func__, an, tid->tid);
5376 ATH_TX_LOCK_ASSERT(sc);
5378 /* Check - is AMPDU pending or running? then print out something */
5379 if (ath_tx_ampdu_pending(sc, an, tid->tid))
5380 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ampdu pending?\n",
5381 __func__, tid->tid);
5382 if (ath_tx_ampdu_running(sc, an, tid->tid))
5383 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ampdu running?\n",
5384 __func__, tid->tid);
5389 * If the upper layers have paused the TID, don't
5390 * queue any further packets.
5392 * XXX if we are leaking frames, make sure we decrement
5393 * that counter _and_ we continue here.
5395 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
5398 bf = ATH_TID_FIRST(tid);
5403 ATH_TID_REMOVE(tid, bf, bf_list);
5406 if (tid->tid != bf->bf_state.bfs_tid) {
5407 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bfs_tid %d !="
5408 " tid %d\n", __func__, bf->bf_state.bfs_tid,
5411 /* Normal completion handler */
5412 bf->bf_comp = ath_tx_normal_comp;
5415 * Override this for now, until the non-aggregate
5416 * completion handler correctly handles software retransmits.
5418 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
5420 /* Update CLRDMASK just before this frame is queued */
5421 ath_tx_update_clrdmask(sc, tid, bf);
5423 /* Program descriptors + rate control */
5424 ath_tx_do_ratelookup(sc, bf);
5425 ath_tx_calc_duration(sc, bf);
5426 ath_tx_calc_protection(sc, bf);
5427 ath_tx_set_rtscts(sc, bf);
5428 ath_tx_rate_fill_rcflags(sc, bf);
5429 ath_tx_setds(sc, bf);
5432 * Update the current leak count if
5433 * we're leaking frames; and set the
5434 * MORE flag as appropriate.
5436 ath_tx_leak_count_update(sc, tid, bf);
5438 /* Track outstanding buffer count to hardware */
5439 /* aggregates are "one" buffer */
5442 /* Punt to hardware or software txq */
5443 ath_tx_handoff(sc, txq, bf);
5448 * Schedule some packets to the given hardware queue.
5450 * This function walks the list of TIDs (ie, ath_node TIDs
5451 * with queued traffic) and attempts to schedule traffic
5454 * TID scheduling is implemented as a FIFO, with TIDs being
5455 * added to the end of the queue after some frames have been
5459 ath_txq_sched(struct ath_softc *sc, struct ath_txq *txq)
5461 struct ath_tid *tid, *next, *last;
5463 ATH_TX_LOCK_ASSERT(sc);
5466 * Don't schedule if the hardware queue is busy.
5467 * This (hopefully) gives some more time to aggregate
5468 * some packets in the aggregation queue.
5470 * XXX It doesn't stop a parallel sender from sneaking
5471 * in transmitting a frame!
5473 /* XXX TXQ locking */
5474 if (txq->axq_aggr_depth + txq->fifo.axq_depth >= sc->sc_hwq_limit_aggr) {
5475 sc->sc_aggr_stats.aggr_sched_nopkt++;
5478 if (txq->axq_depth >= sc->sc_hwq_limit_nonaggr) {
5479 sc->sc_aggr_stats.aggr_sched_nopkt++;
5483 last = TAILQ_LAST(&txq->axq_tidq, axq_t_s);
5485 TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) {
5487 * Suspend paused queues here; they'll be resumed
5488 * once the addba completes or times out.
5490 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n",
5491 __func__, tid->tid, tid->paused);
5492 ath_tx_tid_unsched(sc, tid);
5494 * This node may be in power-save and we're leaking
5495 * a frame; be careful.
5497 if (! ath_tx_tid_can_tx_or_sched(sc, tid)) {
5500 if (ath_tx_ampdu_running(sc, tid->an, tid->tid))
5501 ath_tx_tid_hw_queue_aggr(sc, tid->an, tid);
5503 ath_tx_tid_hw_queue_norm(sc, tid->an, tid);
5505 /* Not empty? Re-schedule */
5506 if (tid->axq_depth != 0)
5507 ath_tx_tid_sched(sc, tid);
5510 * Give the software queue time to aggregate more
5511 * packets. If we aren't running aggregation then
5512 * we should still limit the hardware queue depth.
5514 /* XXX TXQ locking */
5515 if (txq->axq_aggr_depth + txq->fifo.axq_depth >= sc->sc_hwq_limit_aggr) {
5518 if (txq->axq_depth >= sc->sc_hwq_limit_nonaggr) {
5523 * If this was the last entry on the original list, stop.
5524 * Otherwise nodes that have been rescheduled onto the end
5525 * of the TID FIFO list will just keep being rescheduled.
5527 * XXX What should we do about nodes that were paused
5528 * but are pending a leaking frame in response to a ps-poll?
5529 * They'll be put at the front of the list; so they'll
5530 * prematurely trigger this condition! Ew.
5542 * Return net80211 TID struct pointer, or NULL for none
5544 struct ieee80211_tx_ampdu *
5545 ath_tx_get_tx_tid(struct ath_node *an, int tid)
5547 struct ieee80211_node *ni = &an->an_node;
5548 struct ieee80211_tx_ampdu *tap;
5550 if (tid == IEEE80211_NONQOS_TID)
5553 tap = &ni->ni_tx_ampdu[tid];
5558 * Is AMPDU-TX running?
5561 ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid)
5563 struct ieee80211_tx_ampdu *tap;
5565 if (tid == IEEE80211_NONQOS_TID)
5568 tap = ath_tx_get_tx_tid(an, tid);
5570 return 0; /* Not valid; default to not running */
5572 return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING);
5576 * Is AMPDU-TX negotiation pending?
5579 ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid)
5581 struct ieee80211_tx_ampdu *tap;
5583 if (tid == IEEE80211_NONQOS_TID)
5586 tap = ath_tx_get_tx_tid(an, tid);
5588 return 0; /* Not valid; default to not pending */
5590 return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND);
5594 * Is AMPDU-TX pending for the given TID?
5599 * Method to handle sending an ADDBA request.
5601 * We tap this so the relevant flags can be set to pause the TID
5602 * whilst waiting for the response.
5604 * XXX there's no timeout handler we can override?
5607 ath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5608 int dialogtoken, int baparamset, int batimeout)
5610 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5611 int tid = tap->txa_tid;
5612 struct ath_node *an = ATH_NODE(ni);
5613 struct ath_tid *atid = &an->an_tid[tid];
5616 * XXX danger Will Robinson!
5618 * Although the taskqueue may be running and scheduling some more
5619 * packets, these should all be _before_ the addba sequence number.
5620 * However, net80211 will keep self-assigning sequence numbers
5621 * until addba has been negotiated.
5623 * In the past, these packets would be "paused" (which still works
5624 * fine, as they're being scheduled to the driver in the same
5625 * serialised method which is calling the addba request routine)
5626 * and when the aggregation session begins, they'll be dequeued
5627 * as aggregate packets and added to the BAW. However, now there's
5628 * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these
5629 * packets. Thus they never get included in the BAW tracking and
5630 * this can cause the initial burst of packets after the addba
5631 * negotiation to "hang", as they quickly fall outside the BAW.
5633 * The "eventual" solution should be to tag these packets with
5634 * dobaw. Although net80211 has given us a sequence number,
5635 * it'll be "after" the left edge of the BAW and thus it'll
5640 * This is a bit annoying. Until net80211 HT code inherits some
5641 * (any) locking, we may have this called in parallel BUT only
5642 * one response/timeout will be called. Grr.
5644 if (atid->addba_tx_pending == 0) {
5645 ath_tx_tid_pause(sc, atid);
5646 atid->addba_tx_pending = 1;
5650 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5651 "%s: %6D: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n",
5655 dialogtoken, baparamset, batimeout);
5656 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5657 "%s: txa_start=%d, ni_txseqs=%d\n",
5658 __func__, tap->txa_start, ni->ni_txseqs[tid]);
5660 return sc->sc_addba_request(ni, tap, dialogtoken, baparamset,
5665 * Handle an ADDBA response.
5667 * We unpause the queue so TX'ing can resume.
5669 * Any packets TX'ed from this point should be "aggregate" (whether
5670 * aggregate or not) so the BAW is updated.
5672 * Note! net80211 keeps self-assigning sequence numbers until
5673 * ampdu is negotiated. This means the initially-negotiated BAW left
5674 * edge won't match the ni->ni_txseq.
5676 * So, being very dirty, the BAW left edge is "slid" here to match
5679 * What likely SHOULD happen is that all packets subsequent to the
5680 * addba request should be tagged as aggregate and queued as non-aggregate
5681 * frames; thus updating the BAW. For now though, I'll just slide the
5685 ath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5686 int status, int code, int batimeout)
5688 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5689 int tid = tap->txa_tid;
5690 struct ath_node *an = ATH_NODE(ni);
5691 struct ath_tid *atid = &an->an_tid[tid];
5694 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5695 "%s: %6D: called; status=%d, code=%d, batimeout=%d\n", __func__,
5698 status, code, batimeout);
5700 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5701 "%s: txa_start=%d, ni_txseqs=%d\n",
5702 __func__, tap->txa_start, ni->ni_txseqs[tid]);
5705 * Call this first, so the interface flags get updated
5706 * before the TID is unpaused. Otherwise a race condition
5707 * exists where the unpaused TID still doesn't yet have
5708 * IEEE80211_AGGR_RUNNING set.
5710 r = sc->sc_addba_response(ni, tap, status, code, batimeout);
5713 atid->addba_tx_pending = 0;
5716 * Slide the BAW left edge to wherever net80211 left it for us.
5717 * Read above for more information.
5719 tap->txa_start = ni->ni_txseqs[tid];
5720 ath_tx_tid_resume(sc, atid);
5727 * Stop ADDBA on a queue.
5729 * This can be called whilst BAR TX is currently active on the queue,
5730 * so make sure this is unblocked before continuing.
5733 ath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
5735 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5736 int tid = tap->txa_tid;
5737 struct ath_node *an = ATH_NODE(ni);
5738 struct ath_tid *atid = &an->an_tid[tid];
5742 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: %6D: called\n",
5748 * Pause TID traffic early, so there aren't any races
5749 * Unblock the pending BAR held traffic, if it's currently paused.
5752 ath_tx_tid_pause(sc, atid);
5753 if (atid->bar_wait) {
5755 * bar_unsuspend() expects bar_tx == 1, as it should be
5756 * called from the TX completion path. This quietens
5757 * the warning. It's cleared for us anyway.
5760 ath_tx_tid_bar_unsuspend(sc, atid);
5764 /* There's no need to hold the TXQ lock here */
5765 sc->sc_addba_stop(ni, tap);
5768 * ath_tx_tid_cleanup will resume the TID if possible, otherwise
5769 * it'll set the cleanup flag, and it'll be unpaused once
5770 * things have been cleaned up.
5774 ath_tx_tid_cleanup(sc, an, tid, &bf_cq);
5776 * Unpause the TID if no cleanup is required.
5778 if (! atid->cleanup_inprogress)
5779 ath_tx_tid_resume(sc, atid);
5782 /* Handle completing frames and fail them */
5783 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
5784 TAILQ_REMOVE(&bf_cq, bf, bf_list);
5785 ath_tx_default_comp(sc, bf, 1);
5791 * Handle a node reassociation.
5793 * We may have a bunch of frames queued to the hardware; those need
5794 * to be marked as cleanup.
5797 ath_tx_node_reassoc(struct ath_softc *sc, struct ath_node *an)
5799 struct ath_tid *tid;
5806 ATH_TX_UNLOCK_ASSERT(sc);
5809 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
5810 tid = &an->an_tid[i];
5811 if (tid->hwq_depth == 0)
5813 ath_tx_tid_pause(sc, tid);
5814 DPRINTF(sc, ATH_DEBUG_NODE,
5815 "%s: %6D: TID %d: cleaning up TID\n",
5817 an->an_node.ni_macaddr,
5820 ath_tx_tid_cleanup(sc, an, i, &bf_cq);
5822 * Unpause the TID if no cleanup is required.
5824 if (! tid->cleanup_inprogress)
5825 ath_tx_tid_resume(sc, tid);
5829 /* Handle completing frames and fail them */
5830 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
5831 TAILQ_REMOVE(&bf_cq, bf, bf_list);
5832 ath_tx_default_comp(sc, bf, 1);
5837 * Note: net80211 bar_timeout() doesn't call this function on BAR failure;
5838 * it simply tears down the aggregation session. Ew.
5840 * It however will call ieee80211_ampdu_stop() which will call
5841 * ic->ic_addba_stop().
5843 * XXX This uses a hard-coded max BAR count value; the whole
5844 * XXX BAR TX success or failure should be better handled!
5847 ath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5850 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5851 int tid = tap->txa_tid;
5852 struct ath_node *an = ATH_NODE(ni);
5853 struct ath_tid *atid = &an->an_tid[tid];
5854 int attempts = tap->txa_attempts;
5856 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
5857 "%s: %6D: called; txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n",
5866 /* Note: This may update the BAW details */
5867 sc->sc_bar_response(ni, tap, status);
5869 /* Unpause the TID */
5871 * XXX if this is attempt=50, the TID will be downgraded
5872 * XXX to a non-aggregate session. So we must unpause the
5873 * XXX TID here or it'll never be done.
5875 * Also, don't call it if bar_tx/bar_wait are 0; something
5876 * has beaten us to the punch? (XXX figure out what?)
5878 if (status == 0 || attempts == 50) {
5880 if (atid->bar_tx == 0 || atid->bar_wait == 0)
5881 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
5882 "%s: huh? bar_tx=%d, bar_wait=%d\n",
5884 atid->bar_tx, atid->bar_wait);
5886 ath_tx_tid_bar_unsuspend(sc, atid);
5892 * This is called whenever the pending ADDBA request times out.
5893 * Unpause and reschedule the TID.
5896 ath_addba_response_timeout(struct ieee80211_node *ni,
5897 struct ieee80211_tx_ampdu *tap)
5899 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5900 int tid = tap->txa_tid;
5901 struct ath_node *an = ATH_NODE(ni);
5902 struct ath_tid *atid = &an->an_tid[tid];
5904 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5905 "%s: %6D: TID=%d, called; resuming\n",
5912 atid->addba_tx_pending = 0;
5915 /* Note: This updates the aggregate state to (again) pending */
5916 sc->sc_addba_response_timeout(ni, tap);
5918 /* Unpause the TID; which reschedules it */
5920 ath_tx_tid_resume(sc, atid);
5925 * Check if a node is asleep or not.
5928 ath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an)
5931 ATH_TX_LOCK_ASSERT(sc);
5933 return (an->an_is_powersave);
5937 * Mark a node as currently "in powersaving."
5938 * This suspends all traffic on the node.
5940 * This must be called with the node/tx locks free.
5942 * XXX TODO: the locking silliness below is due to how the node
5943 * locking currently works. Right now, the node lock is grabbed
5944 * to do rate control lookups and these are done with the TX
5945 * queue lock held. This means the node lock can't be grabbed
5946 * first here or a LOR will occur.
5948 * Eventually (hopefully!) the TX path code will only grab
5949 * the TXQ lock when transmitting and the ath_node lock when
5950 * doing node/TID operations. There are other complications -
5951 * the sched/unsched operations involve walking the per-txq
5952 * 'active tid' list and this requires both locks to be held.
5955 ath_tx_node_sleep(struct ath_softc *sc, struct ath_node *an)
5957 struct ath_tid *atid;
5958 struct ath_txq *txq;
5961 ATH_TX_UNLOCK_ASSERT(sc);
5963 /* Suspend all traffic on the node */
5966 if (an->an_is_powersave) {
5967 DPRINTF(sc, ATH_DEBUG_XMIT,
5968 "%s: %6D: node was already asleep!\n",
5969 __func__, an->an_node.ni_macaddr, ":");
5974 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
5975 atid = &an->an_tid[tid];
5976 txq = sc->sc_ac2q[atid->ac];
5978 ath_tx_tid_pause(sc, atid);
5981 /* Mark node as in powersaving */
5982 an->an_is_powersave = 1;
5988 * Mark a node as currently "awake."
5989 * This resumes all traffic to the node.
5992 ath_tx_node_wakeup(struct ath_softc *sc, struct ath_node *an)
5994 struct ath_tid *atid;
5995 struct ath_txq *txq;
5998 ATH_TX_UNLOCK_ASSERT(sc);
6003 if (an->an_is_powersave == 0) {
6005 DPRINTF(sc, ATH_DEBUG_XMIT,
6006 "%s: an=%p: node was already awake\n",
6011 /* Mark node as awake */
6012 an->an_is_powersave = 0;
6014 * Clear any pending leaked frame requests
6016 an->an_leak_count = 0;
6018 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
6019 atid = &an->an_tid[tid];
6020 txq = sc->sc_ac2q[atid->ac];
6022 ath_tx_tid_resume(sc, atid);
6028 ath_legacy_dma_txsetup(struct ath_softc *sc)
6031 /* nothing new needed */
6036 ath_legacy_dma_txteardown(struct ath_softc *sc)
6039 /* nothing new needed */
6044 ath_xmit_setup_legacy(struct ath_softc *sc)
6047 * For now, just set the descriptor length to sizeof(ath_desc);
6048 * worry about extracting the real length out of the HAL later.
6050 sc->sc_tx_desclen = sizeof(struct ath_desc);
6051 sc->sc_tx_statuslen = sizeof(struct ath_desc);
6052 sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */
6054 sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup;
6055 sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown;
6056 sc->sc_tx.xmit_attach_comp_func = ath_legacy_attach_comp_func;
6058 sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart;
6059 sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff;
6061 sc->sc_tx.xmit_drain = ath_legacy_tx_drain;