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>
32 __FBSDID("$FreeBSD$");
35 * Driver for the Atheros Wireless LAN controller.
37 * This software is derived from work of Atsushi Onoe; his contribution
38 * is greatly appreciated.
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/sysctl.h>
49 #include <sys/malloc.h>
51 #include <sys/mutex.h>
52 #include <sys/kernel.h>
53 #include <sys/socket.h>
54 #include <sys/sockio.h>
55 #include <sys/errno.h>
56 #include <sys/callout.h>
58 #include <sys/endian.h>
59 #include <sys/kthread.h>
60 #include <sys/taskqueue.h>
63 #include <machine/bus.h>
66 #include <net/if_dl.h>
67 #include <net/if_media.h>
68 #include <net/if_types.h>
69 #include <net/if_arp.h>
70 #include <net/ethernet.h>
71 #include <net/if_llc.h>
73 #include <net80211/ieee80211_var.h>
74 #include <net80211/ieee80211_regdomain.h>
75 #ifdef IEEE80211_SUPPORT_SUPERG
76 #include <net80211/ieee80211_superg.h>
78 #ifdef IEEE80211_SUPPORT_TDMA
79 #include <net80211/ieee80211_tdma.h>
81 #include <net80211/ieee80211_ht.h>
86 #include <netinet/in.h>
87 #include <netinet/if_ether.h>
90 #include <dev/ath/if_athvar.h>
91 #include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */
92 #include <dev/ath/ath_hal/ah_diagcodes.h>
94 #include <dev/ath/if_ath_debug.h>
97 #include <dev/ath/ath_tx99/ath_tx99.h>
100 #include <dev/ath/if_ath_misc.h>
101 #include <dev/ath/if_ath_tx.h>
102 #include <dev/ath/if_ath_tx_ht.h>
105 #include <dev/ath/if_ath_alq.h>
109 * How many retries to perform in software
111 #define SWMAX_RETRIES 10
114 * What queue to throw the non-QoS TID traffic into
116 #define ATH_NONQOS_TID_AC WME_AC_VO
119 static int ath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an);
121 static int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an,
123 static int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an,
125 static ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc,
126 struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0);
127 static int ath_tx_action_frame_override_queue(struct ath_softc *sc,
128 struct ieee80211_node *ni, struct mbuf *m0, int *tid);
129 static struct ath_buf *
130 ath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an,
131 struct ath_tid *tid, struct ath_buf *bf);
135 ath_tx_alq_post(struct ath_softc *sc, struct ath_buf *bf_first)
141 /* XXX we should skip out early if debugging isn't enabled! */
145 /* XXX should ensure bf_nseg > 0! */
146 if (bf->bf_nseg == 0)
148 n = ((bf->bf_nseg - 1) / sc->sc_tx_nmaps) + 1;
149 for (i = 0, ds = (const char *) bf->bf_desc;
151 i++, ds += sc->sc_tx_desclen) {
152 if_ath_alq_post(&sc->sc_alq,
160 #endif /* ATH_DEBUG_ALQ */
163 * Whether to use the 11n rate scenario functions or not
166 ath_tx_is_11n(struct ath_softc *sc)
168 return ((sc->sc_ah->ah_magic == 0x20065416) ||
169 (sc->sc_ah->ah_magic == 0x19741014));
173 * Obtain the current TID from the given frame.
175 * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.)
176 * This has implications for which AC/priority the packet is placed
180 ath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0)
182 const struct ieee80211_frame *wh;
183 int pri = M_WME_GETAC(m0);
185 wh = mtod(m0, const struct ieee80211_frame *);
186 if (! IEEE80211_QOS_HAS_SEQ(wh))
187 return IEEE80211_NONQOS_TID;
189 return WME_AC_TO_TID(pri);
193 ath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf)
195 struct ieee80211_frame *wh;
197 wh = mtod(bf->bf_m, struct ieee80211_frame *);
198 /* Only update/resync if needed */
199 if (bf->bf_state.bfs_isretried == 0) {
200 wh->i_fc[1] |= IEEE80211_FC1_RETRY;
201 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap,
202 BUS_DMASYNC_PREWRITE);
204 bf->bf_state.bfs_isretried = 1;
205 bf->bf_state.bfs_retries ++;
209 * Determine what the correct AC queue for the given frame
212 * This code assumes that the TIDs map consistently to
213 * the underlying hardware (or software) ath_txq.
214 * Since the sender may try to set an AC which is
215 * arbitrary, non-QoS TIDs may end up being put on
216 * completely different ACs. There's no way to put a
217 * TID into multiple ath_txq's for scheduling, so
218 * for now we override the AC/TXQ selection and set
219 * non-QOS TID frames into the BE queue.
221 * This may be completely incorrect - specifically,
222 * some management frames may end up out of order
223 * compared to the QoS traffic they're controlling.
224 * I'll look into this later.
227 ath_tx_getac(struct ath_softc *sc, const struct mbuf *m0)
229 const struct ieee80211_frame *wh;
230 int pri = M_WME_GETAC(m0);
231 wh = mtod(m0, const struct ieee80211_frame *);
232 if (IEEE80211_QOS_HAS_SEQ(wh))
235 return ATH_NONQOS_TID_AC;
239 ath_txfrag_cleanup(struct ath_softc *sc,
240 ath_bufhead *frags, struct ieee80211_node *ni)
242 struct ath_buf *bf, *next;
244 ATH_TXBUF_LOCK_ASSERT(sc);
246 TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) {
247 /* NB: bf assumed clean */
248 TAILQ_REMOVE(frags, bf, bf_list);
249 ath_returnbuf_head(sc, bf);
250 ieee80211_node_decref(ni);
255 * Setup xmit of a fragmented frame. Allocate a buffer
256 * for each frag and bump the node reference count to
257 * reflect the held reference to be setup by ath_tx_start.
260 ath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags,
261 struct mbuf *m0, struct ieee80211_node *ni)
267 for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) {
268 /* XXX non-management? */
269 bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL);
270 if (bf == NULL) { /* out of buffers, cleanup */
271 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: no buffer?\n",
273 ath_txfrag_cleanup(sc, frags, ni);
276 ieee80211_node_incref(ni);
277 TAILQ_INSERT_TAIL(frags, bf, bf_list);
279 ATH_TXBUF_UNLOCK(sc);
281 return !TAILQ_EMPTY(frags);
285 * Reclaim mbuf resources. For fragmented frames we
286 * need to claim each frag chained with m_nextpkt.
289 ath_freetx(struct mbuf *m)
297 } while ((m = next) != NULL);
301 ath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0)
307 * Load the DMA map so any coalescing is done. This
308 * also calculates the number of descriptors we need.
310 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0,
311 bf->bf_segs, &bf->bf_nseg,
313 if (error == EFBIG) {
314 /* XXX packet requires too many descriptors */
315 bf->bf_nseg = ATH_MAX_SCATTER + 1;
316 } else if (error != 0) {
317 sc->sc_stats.ast_tx_busdma++;
322 * Discard null packets and check for packets that
323 * require too many TX descriptors. We try to convert
324 * the latter to a cluster.
326 if (bf->bf_nseg > ATH_MAX_SCATTER) { /* too many desc's, linearize */
327 sc->sc_stats.ast_tx_linear++;
328 m = m_collapse(m0, M_NOWAIT, ATH_MAX_SCATTER);
331 sc->sc_stats.ast_tx_nombuf++;
335 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0,
336 bf->bf_segs, &bf->bf_nseg,
339 sc->sc_stats.ast_tx_busdma++;
343 KASSERT(bf->bf_nseg <= ATH_MAX_SCATTER,
344 ("too many segments after defrag; nseg %u", bf->bf_nseg));
345 } else if (bf->bf_nseg == 0) { /* null packet, discard */
346 sc->sc_stats.ast_tx_nodata++;
350 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n",
351 __func__, m0, m0->m_pkthdr.len);
352 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
359 * Chain together segments+descriptors for a frame - 11n or otherwise.
361 * For aggregates, this is called on each frame in the aggregate.
364 ath_tx_chaindesclist(struct ath_softc *sc, struct ath_desc *ds0,
365 struct ath_buf *bf, int is_aggr, int is_first_subframe,
366 int is_last_subframe)
368 struct ath_hal *ah = sc->sc_ah;
371 HAL_DMA_ADDR bufAddrList[4];
372 uint32_t segLenList[4];
377 * XXX There's txdma and txdma_mgmt; the descriptor
380 struct ath_descdma *dd = &sc->sc_txdma;
383 * Fillin the remainder of the descriptor info.
387 * We need the number of TX data pointers in each descriptor.
388 * EDMA and later chips support 4 TX buffers per descriptor;
389 * previous chips just support one.
391 numTxMaps = sc->sc_tx_nmaps;
394 * For EDMA and later chips ensure the TX map is fully populated
395 * before advancing to the next descriptor.
397 ds = (char *) bf->bf_desc;
399 bzero(bufAddrList, sizeof(bufAddrList));
400 bzero(segLenList, sizeof(segLenList));
401 for (i = 0; i < bf->bf_nseg; i++) {
402 bufAddrList[bp] = bf->bf_segs[i].ds_addr;
403 segLenList[bp] = bf->bf_segs[i].ds_len;
407 * Go to the next segment if this isn't the last segment
408 * and there's space in the current TX map.
410 if ((i != bf->bf_nseg - 1) && (bp < numTxMaps))
414 * Last segment or we're out of buffer pointers.
418 if (i == bf->bf_nseg - 1)
419 ath_hal_settxdesclink(ah, (struct ath_desc *) ds, 0);
421 ath_hal_settxdesclink(ah, (struct ath_desc *) ds,
422 bf->bf_daddr + dd->dd_descsize * (dsp + 1));
425 * XXX This assumes that bfs_txq is the actual destination
426 * hardware queue at this point. It may not have been
427 * assigned, it may actually be pointing to the multicast
428 * software TXQ id. These must be fixed!
430 ath_hal_filltxdesc(ah, (struct ath_desc *) ds
433 , bf->bf_descid /* XXX desc id */
434 , bf->bf_state.bfs_tx_queue
435 , isFirstDesc /* first segment */
436 , i == bf->bf_nseg - 1 /* last segment */
437 , (struct ath_desc *) ds0 /* first descriptor */
441 * Make sure the 11n aggregate fields are cleared.
443 * XXX TODO: this doesn't need to be called for
444 * aggregate frames; as it'll be called on all
445 * sub-frames. Since the descriptors are in
446 * non-cacheable memory, this leads to some
447 * rather slow writes on MIPS/ARM platforms.
449 if (ath_tx_is_11n(sc))
450 ath_hal_clr11n_aggr(sc->sc_ah, (struct ath_desc *) ds);
453 * If 11n is enabled, set it up as if it's an aggregate
456 if (is_last_subframe) {
457 ath_hal_set11n_aggr_last(sc->sc_ah,
458 (struct ath_desc *) ds);
459 } else if (is_aggr) {
461 * This clears the aggrlen field; so
462 * the caller needs to call set_aggr_first()!
464 * XXX TODO: don't call this for the first
465 * descriptor in the first frame in an
468 ath_hal_set11n_aggr_middle(sc->sc_ah,
469 (struct ath_desc *) ds,
470 bf->bf_state.bfs_ndelim);
473 bf->bf_lastds = (struct ath_desc *) ds;
476 * Don't forget to skip to the next descriptor.
478 ds += sc->sc_tx_desclen;
482 * .. and don't forget to blank these out!
484 bzero(bufAddrList, sizeof(bufAddrList));
485 bzero(segLenList, sizeof(segLenList));
487 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
491 * Set the rate control fields in the given descriptor based on
492 * the bf_state fields and node state.
494 * The bfs fields should already be set with the relevant rate
495 * control information, including whether MRR is to be enabled.
497 * Since the FreeBSD HAL currently sets up the first TX rate
498 * in ath_hal_setuptxdesc(), this will setup the MRR
499 * conditionally for the pre-11n chips, and call ath_buf_set_rate
500 * unconditionally for 11n chips. These require the 11n rate
501 * scenario to be set if MCS rates are enabled, so it's easier
502 * to just always call it. The caller can then only set rates 2, 3
503 * and 4 if multi-rate retry is needed.
506 ath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni,
509 struct ath_rc_series *rc = bf->bf_state.bfs_rc;
511 /* If mrr is disabled, blank tries 1, 2, 3 */
512 if (! bf->bf_state.bfs_ismrr)
513 rc[1].tries = rc[2].tries = rc[3].tries = 0;
517 * If NOACK is set, just set ntries=1.
519 else if (bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) {
520 rc[1].tries = rc[2].tries = rc[3].tries = 0;
526 * Always call - that way a retried descriptor will
527 * have the MRR fields overwritten.
529 * XXX TODO: see if this is really needed - setting up
530 * the first descriptor should set the MRR fields to 0
533 if (ath_tx_is_11n(sc)) {
534 ath_buf_set_rate(sc, ni, bf);
536 ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc
537 , rc[1].ratecode, rc[1].tries
538 , rc[2].ratecode, rc[2].tries
539 , rc[3].ratecode, rc[3].tries
545 * Setup segments+descriptors for an 11n aggregate.
546 * bf_first is the first buffer in the aggregate.
547 * The descriptor list must already been linked together using
551 ath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first)
553 struct ath_buf *bf, *bf_prev = NULL;
554 struct ath_desc *ds0 = bf_first->bf_desc;
556 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n",
557 __func__, bf_first->bf_state.bfs_nframes,
558 bf_first->bf_state.bfs_al);
562 if (bf->bf_state.bfs_txrate0 == 0)
563 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: bf=%p, txrate0=%d\n",
565 if (bf->bf_state.bfs_rc[0].ratecode == 0)
566 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: bf=%p, rix0=%d\n",
570 * Setup all descriptors of all subframes - this will
571 * call ath_hal_set11naggrmiddle() on every frame.
574 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
575 "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n",
576 __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen,
577 SEQNO(bf->bf_state.bfs_seqno));
580 * Setup the initial fields for the first descriptor - all
581 * the non-11n specific stuff.
583 ath_hal_setuptxdesc(sc->sc_ah, bf->bf_desc
584 , bf->bf_state.bfs_pktlen /* packet length */
585 , bf->bf_state.bfs_hdrlen /* header length */
586 , bf->bf_state.bfs_atype /* Atheros packet type */
587 , bf->bf_state.bfs_txpower /* txpower */
588 , bf->bf_state.bfs_txrate0
589 , bf->bf_state.bfs_try0 /* series 0 rate/tries */
590 , bf->bf_state.bfs_keyix /* key cache index */
591 , bf->bf_state.bfs_txantenna /* antenna mode */
592 , bf->bf_state.bfs_txflags | HAL_TXDESC_INTREQ /* flags */
593 , bf->bf_state.bfs_ctsrate /* rts/cts rate */
594 , bf->bf_state.bfs_ctsduration /* rts/cts duration */
598 * First descriptor? Setup the rate control and initial
599 * aggregate header information.
601 if (bf == bf_first) {
603 * setup first desc with rate and aggr info
605 ath_tx_set_ratectrl(sc, bf->bf_node, bf);
609 * Setup the descriptors for a multi-descriptor frame.
610 * This is both aggregate and non-aggregate aware.
612 ath_tx_chaindesclist(sc, ds0, bf,
614 !! (bf == bf_first), /* is_first_subframe */
615 !! (bf->bf_next == NULL) /* is_last_subframe */
618 if (bf == bf_first) {
620 * Initialise the first 11n aggregate with the
621 * aggregate length and aggregate enable bits.
623 ath_hal_set11n_aggr_first(sc->sc_ah,
626 bf->bf_state.bfs_ndelim);
630 * Link the last descriptor of the previous frame
631 * to the beginning descriptor of this frame.
634 ath_hal_settxdesclink(sc->sc_ah, bf_prev->bf_lastds,
637 /* Save a copy so we can link the next descriptor in */
643 * Set the first descriptor bf_lastds field to point to
644 * the last descriptor in the last subframe, that's where
645 * the status update will occur.
647 bf_first->bf_lastds = bf_prev->bf_lastds;
650 * And bf_last in the first descriptor points to the end of
651 * the aggregate list.
653 bf_first->bf_last = bf_prev;
656 * For non-AR9300 NICs, which require the rate control
657 * in the final descriptor - let's set that up now.
659 * This is because the filltxdesc() HAL call doesn't
660 * populate the last segment with rate control information
661 * if firstSeg is also true. For non-aggregate frames
662 * that is fine, as the first frame already has rate control
663 * info. But if the last frame in an aggregate has one
664 * descriptor, both firstseg and lastseg will be true and
665 * the rate info isn't copied.
667 * This is inefficient on MIPS/ARM platforms that have
668 * non-cachable memory for TX descriptors, but we'll just
671 * As to why the rate table is stashed in the last descriptor
672 * rather than the first descriptor? Because proctxdesc()
673 * is called on the final descriptor in an MPDU or A-MPDU -
674 * ie, the one that gets updated by the hardware upon
675 * completion. That way proctxdesc() doesn't need to know
676 * about the first _and_ last TX descriptor.
678 ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_lastds, ds0);
680 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__);
684 * Hand-off a frame to the multicast TX queue.
686 * This is a software TXQ which will be appended to the CAB queue
687 * during the beacon setup code.
689 * XXX TODO: since the AR9300 EDMA TX queue support wants the QCU ID
690 * as part of the TX descriptor, bf_state.bfs_tx_queue must be updated
691 * with the actual hardware txq, or all of this will fall apart.
693 * XXX It may not be a bad idea to just stuff the QCU ID into bf_state
694 * and retire bfs_tx_queue; then make sure the CABQ QCU ID is populated
698 ath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq,
701 ATH_TX_LOCK_ASSERT(sc);
703 KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0,
704 ("%s: busy status 0x%x", __func__, bf->bf_flags));
707 * Ensure that the tx queue is the cabq, so things get
710 if (bf->bf_state.bfs_tx_queue != sc->sc_cabq->axq_qnum) {
711 DPRINTF(sc, ATH_DEBUG_XMIT,
712 "%s: bf=%p, bfs_tx_queue=%d, axq_qnum=%d\n",
713 __func__, bf, bf->bf_state.bfs_tx_queue,
718 if (ATH_TXQ_LAST(txq, axq_q_s) != NULL) {
719 struct ath_buf *bf_last = ATH_TXQ_LAST(txq, axq_q_s);
720 struct ieee80211_frame *wh;
722 /* mark previous frame */
723 wh = mtod(bf_last->bf_m, struct ieee80211_frame *);
724 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
725 bus_dmamap_sync(sc->sc_dmat, bf_last->bf_dmamap,
726 BUS_DMASYNC_PREWRITE);
728 /* link descriptor */
729 ath_hal_settxdesclink(sc->sc_ah,
733 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
738 * Hand-off packet to a hardware queue.
741 ath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq,
744 struct ath_hal *ah = sc->sc_ah;
745 struct ath_buf *bf_first;
748 * Insert the frame on the outbound list and pass it on
749 * to the hardware. Multicast frames buffered for power
750 * save stations and transmit from the CAB queue are stored
751 * on a s/w only queue and loaded on to the CAB queue in
752 * the SWBA handler since frames only go out on DTIM and
753 * to avoid possible races.
755 ATH_TX_LOCK_ASSERT(sc);
756 KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0,
757 ("%s: busy status 0x%x", __func__, bf->bf_flags));
758 KASSERT(txq->axq_qnum != ATH_TXQ_SWQ,
759 ("ath_tx_handoff_hw called for mcast queue"));
762 * XXX racy, should hold the PCU lock when checking this,
763 * and also should ensure that the TX counter is >0!
765 KASSERT((sc->sc_inreset_cnt == 0),
766 ("%s: TX during reset?\n", __func__));
770 * This causes a LOR. Find out where the PCU lock is being
771 * held whilst the TXQ lock is grabbed - that shouldn't
775 if (sc->sc_inreset_cnt) {
777 DPRINTF(sc, ATH_DEBUG_RESET,
778 "%s: called with sc_in_reset != 0\n",
780 DPRINTF(sc, ATH_DEBUG_XMIT,
781 "%s: queued: TXDP[%u] = %p (%p) depth %d\n",
782 __func__, txq->axq_qnum,
783 (caddr_t)bf->bf_daddr, bf->bf_desc,
785 /* XXX axq_link needs to be set and updated! */
786 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
787 if (bf->bf_state.bfs_aggr)
788 txq->axq_aggr_depth++;
797 * XXX TODO: if there's a holdingbf, then
798 * ATH_TXQ_PUTRUNNING should be clear.
800 * If there is a holdingbf and the list is empty,
801 * then axq_link should be pointing to the holdingbf.
803 * Otherwise it should point to the last descriptor
804 * in the last ath_buf.
806 * In any case, we should really ensure that we
807 * update the previous descriptor link pointer to
808 * this descriptor, regardless of all of the above state.
810 * For now this is captured by having axq_link point
811 * to either the holdingbf (if the TXQ list is empty)
812 * or the end of the list (if the TXQ list isn't empty.)
813 * I'd rather just kill axq_link here and do it as above.
817 * Append the frame to the TX queue.
819 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
820 ATH_KTR(sc, ATH_KTR_TX, 3,
821 "ath_tx_handoff: non-tdma: txq=%u, add bf=%p "
828 * If there's a link pointer, update it.
830 * XXX we should replace this with the above logic, just
831 * to kill axq_link with fire.
833 if (txq->axq_link != NULL) {
834 *txq->axq_link = bf->bf_daddr;
835 DPRINTF(sc, ATH_DEBUG_XMIT,
836 "%s: link[%u](%p)=%p (%p) depth %d\n", __func__,
837 txq->axq_qnum, txq->axq_link,
838 (caddr_t)bf->bf_daddr, bf->bf_desc,
840 ATH_KTR(sc, ATH_KTR_TX, 5,
841 "ath_tx_handoff: non-tdma: link[%u](%p)=%p (%p) "
843 txq->axq_qnum, txq->axq_link,
844 (caddr_t)bf->bf_daddr, bf->bf_desc,
849 * If we've not pushed anything into the hardware yet,
850 * push the head of the queue into the TxDP.
852 * Once we've started DMA, there's no guarantee that
853 * updating the TxDP with a new value will actually work.
854 * So we just don't do that - if we hit the end of the list,
855 * we keep that buffer around (the "holding buffer") and
856 * re-start DMA by updating the link pointer of _that_
857 * descriptor and then restart DMA.
859 if (! (txq->axq_flags & ATH_TXQ_PUTRUNNING)) {
860 bf_first = TAILQ_FIRST(&txq->axq_q);
861 txq->axq_flags |= ATH_TXQ_PUTRUNNING;
862 ath_hal_puttxbuf(ah, txq->axq_qnum, bf_first->bf_daddr);
863 DPRINTF(sc, ATH_DEBUG_XMIT,
864 "%s: TXDP[%u] = %p (%p) depth %d\n",
865 __func__, txq->axq_qnum,
866 (caddr_t)bf_first->bf_daddr, bf_first->bf_desc,
868 ATH_KTR(sc, ATH_KTR_TX, 5,
869 "ath_tx_handoff: TXDP[%u] = %p (%p) "
870 "lastds=%p depth %d",
872 (caddr_t)bf_first->bf_daddr, bf_first->bf_desc,
878 * Ensure that the bf TXQ matches this TXQ, so later
879 * checking and holding buffer manipulation is sane.
881 if (bf->bf_state.bfs_tx_queue != txq->axq_qnum) {
882 DPRINTF(sc, ATH_DEBUG_XMIT,
883 "%s: bf=%p, bfs_tx_queue=%d, axq_qnum=%d\n",
884 __func__, bf, bf->bf_state.bfs_tx_queue,
889 * Track aggregate queue depth.
891 if (bf->bf_state.bfs_aggr)
892 txq->axq_aggr_depth++;
895 * Update the link pointer.
897 ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link);
902 * If we wrote a TxDP above, DMA will start from here.
904 * If DMA is running, it'll do nothing.
906 * If the DMA engine hit the end of the QCU list (ie LINK=NULL,
907 * or VEOL) then it stops at the last transmitted write.
908 * We then append a new frame by updating the link pointer
909 * in that descriptor and then kick TxE here; it will re-read
910 * that last descriptor and find the new descriptor to transmit.
912 * This is why we keep the holding descriptor around.
914 ath_hal_txstart(ah, txq->axq_qnum);
916 ATH_KTR(sc, ATH_KTR_TX, 1,
917 "ath_tx_handoff: txq=%u, txstart", txq->axq_qnum);
921 * Restart TX DMA for the given TXQ.
923 * This must be called whether the queue is empty or not.
926 ath_legacy_tx_dma_restart(struct ath_softc *sc, struct ath_txq *txq)
928 struct ath_buf *bf, *bf_last;
930 ATH_TXQ_LOCK_ASSERT(txq);
932 /* XXX make this ATH_TXQ_FIRST */
933 bf = TAILQ_FIRST(&txq->axq_q);
934 bf_last = ATH_TXQ_LAST(txq, axq_q_s);
939 DPRINTF(sc, ATH_DEBUG_RESET,
940 "%s: Q%d: bf=%p, bf_last=%p, daddr=0x%08x\n",
945 (uint32_t) bf->bf_daddr);
948 if (sc->sc_debug & ATH_DEBUG_RESET)
949 ath_tx_dump(sc, txq);
953 * This is called from a restart, so DMA is known to be
954 * completely stopped.
956 KASSERT((!(txq->axq_flags & ATH_TXQ_PUTRUNNING)),
957 ("%s: Q%d: called with PUTRUNNING=1\n",
961 ath_hal_puttxbuf(sc->sc_ah, txq->axq_qnum, bf->bf_daddr);
962 txq->axq_flags |= ATH_TXQ_PUTRUNNING;
964 ath_hal_gettxdesclinkptr(sc->sc_ah, bf_last->bf_lastds,
966 ath_hal_txstart(sc->sc_ah, txq->axq_qnum);
970 * Hand off a packet to the hardware (or mcast queue.)
972 * The relevant hardware txq should be locked.
975 ath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq,
978 ATH_TX_LOCK_ASSERT(sc);
981 if (if_ath_alq_checkdebug(&sc->sc_alq, ATH_ALQ_EDMA_TXDESC))
982 ath_tx_alq_post(sc, bf);
985 if (txq->axq_qnum == ATH_TXQ_SWQ)
986 ath_tx_handoff_mcast(sc, txq, bf);
988 ath_tx_handoff_hw(sc, txq, bf);
992 ath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni,
993 struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen,
996 DPRINTF(sc, ATH_DEBUG_XMIT,
997 "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n",
1006 const struct ieee80211_cipher *cip;
1007 struct ieee80211_key *k;
1010 * Construct the 802.11 header+trailer for an encrypted
1011 * frame. The only reason this can fail is because of an
1012 * unknown or unsupported cipher/key type.
1014 k = ieee80211_crypto_encap(ni, m0);
1017 * This can happen when the key is yanked after the
1018 * frame was queued. Just discard the frame; the
1019 * 802.11 layer counts failures and provides
1020 * debugging/diagnostics.
1025 * Adjust the packet + header lengths for the crypto
1026 * additions and calculate the h/w key index. When
1027 * a s/w mic is done the frame will have had any mic
1028 * added to it prior to entry so m0->m_pkthdr.len will
1029 * account for it. Otherwise we need to add it to the
1033 (*hdrlen) += cip->ic_header;
1034 (*pktlen) += cip->ic_header + cip->ic_trailer;
1035 /* NB: frags always have any TKIP MIC done in s/w */
1036 if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag)
1037 (*pktlen) += cip->ic_miclen;
1038 (*keyix) = k->wk_keyix;
1039 } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) {
1041 * Use station key cache slot, if assigned.
1043 (*keyix) = ni->ni_ucastkey.wk_keyix;
1044 if ((*keyix) == IEEE80211_KEYIX_NONE)
1045 (*keyix) = HAL_TXKEYIX_INVALID;
1047 (*keyix) = HAL_TXKEYIX_INVALID;
1053 * Calculate whether interoperability protection is required for
1056 * This requires the rate control information be filled in,
1057 * as the protection requirement depends upon the current
1058 * operating mode / PHY.
1061 ath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf)
1063 struct ieee80211_frame *wh;
1067 const HAL_RATE_TABLE *rt = sc->sc_currates;
1068 struct ifnet *ifp = sc->sc_ifp;
1069 struct ieee80211com *ic = ifp->if_l2com;
1071 flags = bf->bf_state.bfs_txflags;
1072 rix = bf->bf_state.bfs_rc[0].rix;
1073 shortPreamble = bf->bf_state.bfs_shpream;
1074 wh = mtod(bf->bf_m, struct ieee80211_frame *);
1077 * If 802.11g protection is enabled, determine whether
1078 * to use RTS/CTS or just CTS. Note that this is only
1079 * done for OFDM unicast frames.
1081 if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
1082 rt->info[rix].phy == IEEE80211_T_OFDM &&
1083 (flags & HAL_TXDESC_NOACK) == 0) {
1084 bf->bf_state.bfs_doprot = 1;
1085 /* XXX fragments must use CCK rates w/ protection */
1086 if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) {
1087 flags |= HAL_TXDESC_RTSENA;
1088 } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) {
1089 flags |= HAL_TXDESC_CTSENA;
1092 * For frags it would be desirable to use the
1093 * highest CCK rate for RTS/CTS. But stations
1094 * farther away may detect it at a lower CCK rate
1095 * so use the configured protection rate instead
1098 sc->sc_stats.ast_tx_protect++;
1102 * If 11n protection is enabled and it's a HT frame,
1105 * XXX ic_htprotmode or ic_curhtprotmode?
1106 * XXX should it_htprotmode only matter if ic_curhtprotmode
1107 * XXX indicates it's not a HT pure environment?
1109 if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) &&
1110 rt->info[rix].phy == IEEE80211_T_HT &&
1111 (flags & HAL_TXDESC_NOACK) == 0) {
1112 flags |= HAL_TXDESC_RTSENA;
1113 sc->sc_stats.ast_tx_htprotect++;
1115 bf->bf_state.bfs_txflags = flags;
1119 * Update the frame duration given the currently selected rate.
1121 * This also updates the frame duration value, so it will require
1125 ath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf)
1127 struct ieee80211_frame *wh;
1131 struct ath_hal *ah = sc->sc_ah;
1132 const HAL_RATE_TABLE *rt = sc->sc_currates;
1133 int isfrag = bf->bf_m->m_flags & M_FRAG;
1135 flags = bf->bf_state.bfs_txflags;
1136 rix = bf->bf_state.bfs_rc[0].rix;
1137 shortPreamble = bf->bf_state.bfs_shpream;
1138 wh = mtod(bf->bf_m, struct ieee80211_frame *);
1141 * Calculate duration. This logically belongs in the 802.11
1142 * layer but it lacks sufficient information to calculate it.
1144 if ((flags & HAL_TXDESC_NOACK) == 0 &&
1145 (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) {
1148 dur = rt->info[rix].spAckDuration;
1150 dur = rt->info[rix].lpAckDuration;
1151 if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) {
1152 dur += dur; /* additional SIFS+ACK */
1154 * Include the size of next fragment so NAV is
1155 * updated properly. The last fragment uses only
1158 * XXX TODO: ensure that the rate lookup for each
1159 * fragment is the same as the rate used by the
1162 dur += ath_hal_computetxtime(ah,
1165 rix, shortPreamble);
1169 * Force hardware to use computed duration for next
1170 * fragment by disabling multi-rate retry which updates
1171 * duration based on the multi-rate duration table.
1173 bf->bf_state.bfs_ismrr = 0;
1174 bf->bf_state.bfs_try0 = ATH_TXMGTTRY;
1175 /* XXX update bfs_rc[0].try? */
1178 /* Update the duration field itself */
1179 *(u_int16_t *)wh->i_dur = htole16(dur);
1184 ath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt,
1185 int cix, int shortPreamble)
1190 * CTS transmit rate is derived from the transmit rate
1191 * by looking in the h/w rate table. We must also factor
1192 * in whether or not a short preamble is to be used.
1194 /* NB: cix is set above where RTS/CTS is enabled */
1195 KASSERT(cix != 0xff, ("cix not setup"));
1196 ctsrate = rt->info[cix].rateCode;
1198 /* XXX this should only matter for legacy rates */
1200 ctsrate |= rt->info[cix].shortPreamble;
1206 * Calculate the RTS/CTS duration for legacy frames.
1209 ath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix,
1210 int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt,
1213 int ctsduration = 0;
1215 /* This mustn't be called for HT modes */
1216 if (rt->info[cix].phy == IEEE80211_T_HT) {
1217 printf("%s: HT rate where it shouldn't be (0x%x)\n",
1218 __func__, rt->info[cix].rateCode);
1223 * Compute the transmit duration based on the frame
1224 * size and the size of an ACK frame. We call into the
1225 * HAL to do the computation since it depends on the
1226 * characteristics of the actual PHY being used.
1228 * NB: CTS is assumed the same size as an ACK so we can
1229 * use the precalculated ACK durations.
1231 if (shortPreamble) {
1232 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */
1233 ctsduration += rt->info[cix].spAckDuration;
1234 ctsduration += ath_hal_computetxtime(ah,
1235 rt, pktlen, rix, AH_TRUE);
1236 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */
1237 ctsduration += rt->info[rix].spAckDuration;
1239 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */
1240 ctsduration += rt->info[cix].lpAckDuration;
1241 ctsduration += ath_hal_computetxtime(ah,
1242 rt, pktlen, rix, AH_FALSE);
1243 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */
1244 ctsduration += rt->info[rix].lpAckDuration;
1247 return (ctsduration);
1251 * Update the given ath_buf with updated rts/cts setup and duration
1254 * To support rate lookups for each software retry, the rts/cts rate
1255 * and cts duration must be re-calculated.
1257 * This function assumes the RTS/CTS flags have been set as needed;
1258 * mrr has been disabled; and the rate control lookup has been done.
1260 * XXX TODO: MRR need only be disabled for the pre-11n NICs.
1261 * XXX The 11n NICs support per-rate RTS/CTS configuration.
1264 ath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf)
1266 uint16_t ctsduration = 0;
1267 uint8_t ctsrate = 0;
1268 uint8_t rix = bf->bf_state.bfs_rc[0].rix;
1270 const HAL_RATE_TABLE *rt = sc->sc_currates;
1273 * No RTS/CTS enabled? Don't bother.
1275 if ((bf->bf_state.bfs_txflags &
1276 (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) {
1277 /* XXX is this really needed? */
1278 bf->bf_state.bfs_ctsrate = 0;
1279 bf->bf_state.bfs_ctsduration = 0;
1284 * If protection is enabled, use the protection rix control
1285 * rate. Otherwise use the rate0 control rate.
1287 if (bf->bf_state.bfs_doprot)
1288 rix = sc->sc_protrix;
1290 rix = bf->bf_state.bfs_rc[0].rix;
1293 * If the raw path has hard-coded ctsrate0 to something,
1296 if (bf->bf_state.bfs_ctsrate0 != 0)
1297 cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0);
1299 /* Control rate from above */
1300 cix = rt->info[rix].controlRate;
1302 /* Calculate the rtscts rate for the given cix */
1303 ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix,
1304 bf->bf_state.bfs_shpream);
1306 /* The 11n chipsets do ctsduration calculations for you */
1307 if (! ath_tx_is_11n(sc))
1308 ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix,
1309 bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen,
1310 rt, bf->bf_state.bfs_txflags);
1312 /* Squirrel away in ath_buf */
1313 bf->bf_state.bfs_ctsrate = ctsrate;
1314 bf->bf_state.bfs_ctsduration = ctsduration;
1317 * Must disable multi-rate retry when using RTS/CTS.
1319 if (!sc->sc_mrrprot) {
1320 bf->bf_state.bfs_ismrr = 0;
1321 bf->bf_state.bfs_try0 =
1322 bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */
1327 * Setup the descriptor chain for a normal or fast-frame
1330 * XXX TODO: extend to include the destination hardware QCU ID.
1331 * Make sure that is correct. Make sure that when being added
1332 * to the mcastq, the CABQ QCUID is set or things will get a bit
1336 ath_tx_setds(struct ath_softc *sc, struct ath_buf *bf)
1338 struct ath_desc *ds = bf->bf_desc;
1339 struct ath_hal *ah = sc->sc_ah;
1341 if (bf->bf_state.bfs_txrate0 == 0)
1342 DPRINTF(sc, ATH_DEBUG_XMIT,
1343 "%s: bf=%p, txrate0=%d\n", __func__, bf, 0);
1345 ath_hal_setuptxdesc(ah, ds
1346 , bf->bf_state.bfs_pktlen /* packet length */
1347 , bf->bf_state.bfs_hdrlen /* header length */
1348 , bf->bf_state.bfs_atype /* Atheros packet type */
1349 , bf->bf_state.bfs_txpower /* txpower */
1350 , bf->bf_state.bfs_txrate0
1351 , bf->bf_state.bfs_try0 /* series 0 rate/tries */
1352 , bf->bf_state.bfs_keyix /* key cache index */
1353 , bf->bf_state.bfs_txantenna /* antenna mode */
1354 , bf->bf_state.bfs_txflags /* flags */
1355 , bf->bf_state.bfs_ctsrate /* rts/cts rate */
1356 , bf->bf_state.bfs_ctsduration /* rts/cts duration */
1360 * This will be overriden when the descriptor chain is written.
1365 /* Set rate control and descriptor chain for this frame */
1366 ath_tx_set_ratectrl(sc, bf->bf_node, bf);
1367 ath_tx_chaindesclist(sc, ds, bf, 0, 0, 0);
1373 * This performs a rate lookup for the given ath_buf only if it's required.
1374 * Non-data frames and raw frames don't require it.
1376 * This populates the primary and MRR entries; MRR values are
1377 * then disabled later on if something requires it (eg RTS/CTS on
1380 * This needs to be done before the RTS/CTS fields are calculated
1381 * as they may depend upon the rate chosen.
1384 ath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf)
1389 if (! bf->bf_state.bfs_doratelookup)
1392 /* Get rid of any previous state */
1393 bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
1395 ATH_NODE_LOCK(ATH_NODE(bf->bf_node));
1396 ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream,
1397 bf->bf_state.bfs_pktlen, &rix, &try0, &rate);
1399 /* In case MRR is disabled, make sure rc[0] is setup correctly */
1400 bf->bf_state.bfs_rc[0].rix = rix;
1401 bf->bf_state.bfs_rc[0].ratecode = rate;
1402 bf->bf_state.bfs_rc[0].tries = try0;
1404 if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY)
1405 ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix,
1406 bf->bf_state.bfs_rc);
1407 ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node));
1409 sc->sc_txrix = rix; /* for LED blinking */
1410 sc->sc_lastdatarix = rix; /* for fast frames */
1411 bf->bf_state.bfs_try0 = try0;
1412 bf->bf_state.bfs_txrate0 = rate;
1416 * Update the CLRDMASK bit in the ath_buf if it needs to be set.
1419 ath_tx_update_clrdmask(struct ath_softc *sc, struct ath_tid *tid,
1422 struct ath_node *an = ATH_NODE(bf->bf_node);
1424 ATH_TX_LOCK_ASSERT(sc);
1426 if (an->clrdmask == 1) {
1427 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
1433 * Return whether this frame should be software queued or
1434 * direct dispatched.
1436 * When doing powersave, BAR frames should be queued but other management
1437 * frames should be directly sent.
1439 * When not doing powersave, stick BAR frames into the hardware queue
1440 * so it goes out even though the queue is paused.
1442 * For now, management frames are also software queued by default.
1445 ath_tx_should_swq_frame(struct ath_softc *sc, struct ath_node *an,
1446 struct mbuf *m0, int *queue_to_head)
1448 struct ieee80211_node *ni = &an->an_node;
1449 struct ieee80211_frame *wh;
1450 uint8_t type, subtype;
1452 wh = mtod(m0, struct ieee80211_frame *);
1453 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1454 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1456 (*queue_to_head) = 0;
1458 /* If it's not in powersave - direct-dispatch BAR */
1459 if ((ATH_NODE(ni)->an_is_powersave == 0)
1460 && type == IEEE80211_FC0_TYPE_CTL &&
1461 subtype == IEEE80211_FC0_SUBTYPE_BAR) {
1462 DPRINTF(sc, ATH_DEBUG_SW_TX,
1463 "%s: BAR: TX'ing direct\n", __func__);
1465 } else if ((ATH_NODE(ni)->an_is_powersave == 1)
1466 && type == IEEE80211_FC0_TYPE_CTL &&
1467 subtype == IEEE80211_FC0_SUBTYPE_BAR) {
1468 /* BAR TX whilst asleep; queue */
1469 DPRINTF(sc, ATH_DEBUG_SW_TX,
1470 "%s: swq: TX'ing\n", __func__);
1471 (*queue_to_head) = 1;
1473 } else if ((ATH_NODE(ni)->an_is_powersave == 1)
1474 && (type == IEEE80211_FC0_TYPE_MGT ||
1475 type == IEEE80211_FC0_TYPE_CTL)) {
1477 * Other control/mgmt frame; bypass software queuing
1480 DPRINTF(sc, ATH_DEBUG_XMIT,
1481 "%s: %6D: Node is asleep; sending mgmt "
1482 "(type=%d, subtype=%d)\n",
1483 __func__, ni->ni_macaddr, ":", type, subtype);
1492 * Transmit the given frame to the hardware.
1494 * The frame must already be setup; rate control must already have
1497 * XXX since the TXQ lock is being held here (and I dislike holding
1498 * it for this long when not doing software aggregation), later on
1499 * break this function into "setup_normal" and "xmit_normal". The
1500 * lock only needs to be held for the ath_tx_handoff call.
1502 * XXX we don't update the leak count here - if we're doing
1503 * direct frame dispatch, we need to be able to do it without
1504 * decrementing the leak count (eg multicast queue frames.)
1507 ath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq,
1510 struct ath_node *an = ATH_NODE(bf->bf_node);
1511 struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid];
1513 ATH_TX_LOCK_ASSERT(sc);
1516 * For now, just enable CLRDMASK. ath_tx_xmit_normal() does
1517 * set a completion handler however it doesn't (yet) properly
1518 * handle the strict ordering requirements needed for normal,
1519 * non-aggregate session frames.
1521 * Once this is implemented, only set CLRDMASK like this for
1522 * frames that must go out - eg management/raw frames.
1524 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
1526 /* Setup the descriptor before handoff */
1527 ath_tx_do_ratelookup(sc, bf);
1528 ath_tx_calc_duration(sc, bf);
1529 ath_tx_calc_protection(sc, bf);
1530 ath_tx_set_rtscts(sc, bf);
1531 ath_tx_rate_fill_rcflags(sc, bf);
1532 ath_tx_setds(sc, bf);
1534 /* Track per-TID hardware queue depth correctly */
1537 /* Assign the completion handler */
1538 bf->bf_comp = ath_tx_normal_comp;
1540 /* Hand off to hardware */
1541 ath_tx_handoff(sc, txq, bf);
1545 * Do the basic frame setup stuff that's required before the frame
1546 * is added to a software queue.
1548 * All frames get mostly the same treatment and it's done once.
1549 * Retransmits fiddle with things like the rate control setup,
1550 * setting the retransmit bit in the packet; doing relevant DMA/bus
1551 * syncing and relinking it (back) into the hardware TX queue.
1553 * Note that this may cause the mbuf to be reallocated, so
1554 * m0 may not be valid.
1557 ath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni,
1558 struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq)
1560 struct ieee80211vap *vap = ni->ni_vap;
1561 struct ath_hal *ah = sc->sc_ah;
1562 struct ifnet *ifp = sc->sc_ifp;
1563 struct ieee80211com *ic = ifp->if_l2com;
1564 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams;
1565 int error, iswep, ismcast, isfrag, ismrr;
1566 int keyix, hdrlen, pktlen, try0 = 0;
1567 u_int8_t rix = 0, txrate = 0;
1568 struct ath_desc *ds;
1569 struct ieee80211_frame *wh;
1570 u_int subtype, flags;
1572 const HAL_RATE_TABLE *rt;
1573 HAL_BOOL shortPreamble;
1574 struct ath_node *an;
1578 * To ensure that both sequence numbers and the CCMP PN handling
1579 * is "correct", make sure that the relevant TID queue is locked.
1580 * Otherwise the CCMP PN and seqno may appear out of order, causing
1581 * re-ordered frames to have out of order CCMP PN's, resulting
1582 * in many, many frame drops.
1584 ATH_TX_LOCK_ASSERT(sc);
1586 wh = mtod(m0, struct ieee80211_frame *);
1587 iswep = wh->i_fc[1] & IEEE80211_FC1_WEP;
1588 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1589 isfrag = m0->m_flags & M_FRAG;
1590 hdrlen = ieee80211_anyhdrsize(wh);
1592 * Packet length must not include any
1593 * pad bytes; deduct them here.
1595 pktlen = m0->m_pkthdr.len - (hdrlen & 3);
1597 /* Handle encryption twiddling if needed */
1598 if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen,
1604 /* packet header may have moved, reset our local pointer */
1605 wh = mtod(m0, struct ieee80211_frame *);
1607 pktlen += IEEE80211_CRC_LEN;
1610 * Load the DMA map so any coalescing is done. This
1611 * also calculates the number of descriptors we need.
1613 error = ath_tx_dmasetup(sc, bf, m0);
1616 bf->bf_node = ni; /* NB: held reference */
1617 m0 = bf->bf_m; /* NB: may have changed */
1618 wh = mtod(m0, struct ieee80211_frame *);
1620 /* setup descriptors */
1622 rt = sc->sc_currates;
1623 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
1626 * NB: the 802.11 layer marks whether or not we should
1627 * use short preamble based on the current mode and
1628 * negotiated parameters.
1630 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
1631 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) {
1632 shortPreamble = AH_TRUE;
1633 sc->sc_stats.ast_tx_shortpre++;
1635 shortPreamble = AH_FALSE;
1639 //flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */
1641 ismrr = 0; /* default no multi-rate retry*/
1642 pri = M_WME_GETAC(m0); /* honor classification */
1643 /* XXX use txparams instead of fixed values */
1645 * Calculate Atheros packet type from IEEE80211 packet header,
1646 * setup for rate calculations, and select h/w transmit queue.
1648 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
1649 case IEEE80211_FC0_TYPE_MGT:
1650 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1651 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON)
1652 atype = HAL_PKT_TYPE_BEACON;
1653 else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1654 atype = HAL_PKT_TYPE_PROBE_RESP;
1655 else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM)
1656 atype = HAL_PKT_TYPE_ATIM;
1658 atype = HAL_PKT_TYPE_NORMAL; /* XXX */
1659 rix = an->an_mgmtrix;
1660 txrate = rt->info[rix].rateCode;
1662 txrate |= rt->info[rix].shortPreamble;
1663 try0 = ATH_TXMGTTRY;
1664 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
1666 case IEEE80211_FC0_TYPE_CTL:
1667 atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */
1668 rix = an->an_mgmtrix;
1669 txrate = rt->info[rix].rateCode;
1671 txrate |= rt->info[rix].shortPreamble;
1672 try0 = ATH_TXMGTTRY;
1673 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
1675 case IEEE80211_FC0_TYPE_DATA:
1676 atype = HAL_PKT_TYPE_NORMAL; /* default */
1678 * Data frames: multicast frames go out at a fixed rate,
1679 * EAPOL frames use the mgmt frame rate; otherwise consult
1680 * the rate control module for the rate to use.
1683 rix = an->an_mcastrix;
1684 txrate = rt->info[rix].rateCode;
1686 txrate |= rt->info[rix].shortPreamble;
1688 } else if (m0->m_flags & M_EAPOL) {
1689 /* XXX? maybe always use long preamble? */
1690 rix = an->an_mgmtrix;
1691 txrate = rt->info[rix].rateCode;
1693 txrate |= rt->info[rix].shortPreamble;
1694 try0 = ATH_TXMAXTRY; /* XXX?too many? */
1697 * Do rate lookup on each TX, rather than using
1698 * the hard-coded TX information decided here.
1701 bf->bf_state.bfs_doratelookup = 1;
1703 if (cap->cap_wmeParams[pri].wmep_noackPolicy)
1704 flags |= HAL_TXDESC_NOACK;
1707 if_printf(ifp, "bogus frame type 0x%x (%s)\n",
1708 wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__);
1710 /* XXX free tx dmamap */
1716 * There are two known scenarios where the frame AC doesn't match
1717 * what the destination TXQ is.
1719 * + non-QoS frames (eg management?) that the net80211 stack has
1720 * assigned a higher AC to, but since it's a non-QoS TID, it's
1721 * being thrown into TID 16. TID 16 gets the AC_BE queue.
1722 * It's quite possible that management frames should just be
1723 * direct dispatched to hardware rather than go via the software
1724 * queue; that should be investigated in the future. There are
1725 * some specific scenarios where this doesn't make sense, mostly
1726 * surrounding ADDBA request/response - hence why that is special
1729 * + Multicast frames going into the VAP mcast queue. That shows up
1732 * This driver should eventually support separate TID and TXQ locking,
1733 * allowing for arbitrary AC frames to appear on arbitrary software
1734 * queues, being queued to the "correct" hardware queue when needed.
1737 if (txq != sc->sc_ac2q[pri]) {
1738 DPRINTF(sc, ATH_DEBUG_XMIT,
1739 "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n",
1745 sc->sc_ac2q[pri]->axq_qnum);
1750 * Calculate miscellaneous flags.
1753 flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */
1754 } else if (pktlen > vap->iv_rtsthreshold &&
1755 (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) {
1756 flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */
1757 sc->sc_stats.ast_tx_rts++;
1759 if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */
1760 sc->sc_stats.ast_tx_noack++;
1761 #ifdef IEEE80211_SUPPORT_TDMA
1762 if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) {
1763 DPRINTF(sc, ATH_DEBUG_TDMA,
1764 "%s: discard frame, ACK required w/ TDMA\n", __func__);
1765 sc->sc_stats.ast_tdma_ack++;
1766 /* XXX free tx dmamap */
1773 * Determine if a tx interrupt should be generated for
1774 * this descriptor. We take a tx interrupt to reap
1775 * descriptors when the h/w hits an EOL condition or
1776 * when the descriptor is specifically marked to generate
1777 * an interrupt. We periodically mark descriptors in this
1778 * way to insure timely replenishing of the supply needed
1779 * for sending frames. Defering interrupts reduces system
1780 * load and potentially allows more concurrent work to be
1781 * done but if done to aggressively can cause senders to
1784 * NB: use >= to deal with sc_txintrperiod changing
1785 * dynamically through sysctl.
1787 if (flags & HAL_TXDESC_INTREQ) {
1788 txq->axq_intrcnt = 0;
1789 } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) {
1790 flags |= HAL_TXDESC_INTREQ;
1791 txq->axq_intrcnt = 0;
1794 /* This point forward is actual TX bits */
1797 * At this point we are committed to sending the frame
1798 * and we don't need to look at m_nextpkt; clear it in
1799 * case this frame is part of frag chain.
1801 m0->m_nextpkt = NULL;
1803 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT))
1804 ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len,
1805 sc->sc_hwmap[rix].ieeerate, -1);
1807 if (ieee80211_radiotap_active_vap(vap)) {
1808 u_int64_t tsf = ath_hal_gettsf64(ah);
1810 sc->sc_tx_th.wt_tsf = htole64(tsf);
1811 sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags;
1813 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
1815 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG;
1816 sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate;
1817 sc->sc_tx_th.wt_txpower = ieee80211_get_node_txpower(ni);
1818 sc->sc_tx_th.wt_antenna = sc->sc_txantenna;
1820 ieee80211_radiotap_tx(vap, m0);
1823 /* Blank the legacy rate array */
1824 bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
1827 * ath_buf_set_rate needs at least one rate/try to setup
1828 * the rate scenario.
1830 bf->bf_state.bfs_rc[0].rix = rix;
1831 bf->bf_state.bfs_rc[0].tries = try0;
1832 bf->bf_state.bfs_rc[0].ratecode = txrate;
1834 /* Store the decided rate index values away */
1835 bf->bf_state.bfs_pktlen = pktlen;
1836 bf->bf_state.bfs_hdrlen = hdrlen;
1837 bf->bf_state.bfs_atype = atype;
1838 bf->bf_state.bfs_txpower = ieee80211_get_node_txpower(ni);
1839 bf->bf_state.bfs_txrate0 = txrate;
1840 bf->bf_state.bfs_try0 = try0;
1841 bf->bf_state.bfs_keyix = keyix;
1842 bf->bf_state.bfs_txantenna = sc->sc_txantenna;
1843 bf->bf_state.bfs_txflags = flags;
1844 bf->bf_state.bfs_shpream = shortPreamble;
1846 /* XXX this should be done in ath_tx_setrate() */
1847 bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */
1848 bf->bf_state.bfs_ctsrate = 0; /* calculated later */
1849 bf->bf_state.bfs_ctsduration = 0;
1850 bf->bf_state.bfs_ismrr = ismrr;
1856 * Queue a frame to the hardware or software queue.
1858 * This can be called by the net80211 code.
1860 * XXX what about locking? Or, push the seqno assign into the
1861 * XXX aggregate scheduler so its serialised?
1863 * XXX When sending management frames via ath_raw_xmit(),
1864 * should CLRDMASK be set unconditionally?
1867 ath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni,
1868 struct ath_buf *bf, struct mbuf *m0)
1870 struct ieee80211vap *vap = ni->ni_vap;
1871 struct ath_vap *avp = ATH_VAP(vap);
1875 struct ath_txq *txq;
1877 const struct ieee80211_frame *wh;
1878 int is_ampdu, is_ampdu_tx, is_ampdu_pending;
1879 ieee80211_seq seqno;
1880 uint8_t type, subtype;
1883 ATH_TX_LOCK_ASSERT(sc);
1886 * Determine the target hardware queue.
1888 * For multicast frames, the txq gets overridden appropriately
1889 * depending upon the state of PS.
1891 * For any other frame, we do a TID/QoS lookup inside the frame
1892 * to see what the TID should be. If it's a non-QoS frame, the
1893 * AC and TID are overridden. The TID/TXQ code assumes the
1894 * TID is on a predictable hardware TXQ, so we don't support
1895 * having a node TID queued to multiple hardware TXQs.
1896 * This may change in the future but would require some locking
1899 pri = ath_tx_getac(sc, m0);
1900 tid = ath_tx_gettid(sc, m0);
1902 txq = sc->sc_ac2q[pri];
1903 wh = mtod(m0, struct ieee80211_frame *);
1904 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1905 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1906 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1909 * Enforce how deep the multicast queue can grow.
1911 * XXX duplicated in ath_raw_xmit().
1913 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1914 if (sc->sc_cabq->axq_depth + sc->sc_cabq->fifo.axq_depth
1915 > sc->sc_txq_mcastq_maxdepth) {
1916 sc->sc_stats.ast_tx_mcastq_overflow++;
1923 * Enforce how deep the unicast queue can grow.
1925 * If the node is in power save then we don't want
1926 * the software queue to grow too deep, or a node may
1927 * end up consuming all of the ath_buf entries.
1929 * For now, only do this for DATA frames.
1931 * We will want to cap how many management/control
1932 * frames get punted to the software queue so it doesn't
1933 * fill up. But the correct solution isn't yet obvious.
1934 * In any case, this check should at least let frames pass
1935 * that we are direct-dispatching.
1937 * XXX TODO: duplicate this to the raw xmit path!
1939 if (type == IEEE80211_FC0_TYPE_DATA &&
1940 ATH_NODE(ni)->an_is_powersave &&
1941 ATH_NODE(ni)->an_swq_depth >
1942 sc->sc_txq_node_psq_maxdepth) {
1943 sc->sc_stats.ast_tx_node_psq_overflow++;
1949 is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid);
1950 is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid);
1951 is_ampdu = is_ampdu_tx | is_ampdu_pending;
1953 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n",
1954 __func__, tid, pri, is_ampdu);
1956 /* Set local packet state, used to queue packets to hardware */
1957 bf->bf_state.bfs_tid = tid;
1958 bf->bf_state.bfs_tx_queue = txq->axq_qnum;
1959 bf->bf_state.bfs_pri = pri;
1963 * When servicing one or more stations in power-save mode
1964 * (or) if there is some mcast data waiting on the mcast
1965 * queue (to prevent out of order delivery) multicast frames
1966 * must be bufferd until after the beacon.
1968 * TODO: we should lock the mcastq before we check the length.
1970 if (sc->sc_cabq_enable && ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) {
1971 txq = &avp->av_mcastq;
1973 * Mark the frame as eventually belonging on the CAB
1974 * queue, so the descriptor setup functions will
1975 * correctly initialise the descriptor 'qcuId' field.
1977 bf->bf_state.bfs_tx_queue = sc->sc_cabq->axq_qnum;
1981 /* Do the generic frame setup */
1982 /* XXX should just bzero the bf_state? */
1983 bf->bf_state.bfs_dobaw = 0;
1985 /* A-MPDU TX? Manually set sequence number */
1987 * Don't do it whilst pending; the net80211 layer still
1992 * Always call; this function will
1993 * handle making sure that null data frames
1994 * don't get a sequence number from the current
1995 * TID and thus mess with the BAW.
1997 seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0);
2000 * Don't add QoS NULL frames to the BAW.
2002 if (IEEE80211_QOS_HAS_SEQ(wh) &&
2003 subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) {
2004 bf->bf_state.bfs_dobaw = 1;
2009 * If needed, the sequence number has been assigned.
2010 * Squirrel it away somewhere easy to get to.
2012 bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT;
2014 /* Is ampdu pending? fetch the seqno and print it out */
2015 if (is_ampdu_pending)
2016 DPRINTF(sc, ATH_DEBUG_SW_TX,
2017 "%s: tid %d: ampdu pending, seqno %d\n",
2018 __func__, tid, M_SEQNO_GET(m0));
2020 /* This also sets up the DMA map */
2021 r = ath_tx_normal_setup(sc, ni, bf, m0, txq);
2026 /* At this point m0 could have changed! */
2031 * If it's a multicast frame, do a direct-dispatch to the
2032 * destination hardware queue. Don't bother software
2036 * If it's a BAR frame, do a direct dispatch to the
2037 * destination hardware queue. Don't bother software
2038 * queuing it, as the TID will now be paused.
2039 * Sending a BAR frame can occur from the net80211 txa timer
2040 * (ie, retries) or from the ath txtask (completion call.)
2041 * It queues directly to hardware because the TID is paused
2042 * at this point (and won't be unpaused until the BAR has
2043 * either been TXed successfully or max retries has been
2047 * Until things are better debugged - if this node is asleep
2048 * and we're sending it a non-BAR frame, direct dispatch it.
2049 * Why? Because we need to figure out what's actually being
2050 * sent - eg, during reassociation/reauthentication after
2051 * the node (last) disappeared whilst asleep, the driver should
2052 * have unpaused/unsleep'ed the node. So until that is
2053 * sorted out, use this workaround.
2055 if (txq == &avp->av_mcastq) {
2056 DPRINTF(sc, ATH_DEBUG_SW_TX,
2057 "%s: bf=%p: mcastq: TX'ing\n", __func__, bf);
2058 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2059 ath_tx_xmit_normal(sc, txq, bf);
2060 } else if (ath_tx_should_swq_frame(sc, ATH_NODE(ni), m0,
2062 ath_tx_swq(sc, ni, txq, queue_to_head, bf);
2064 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2065 ath_tx_xmit_normal(sc, txq, bf);
2069 * For now, since there's no software queue,
2070 * direct-dispatch to the hardware.
2072 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2074 * Update the current leak count if
2075 * we're leaking frames; and set the
2076 * MORE flag as appropriate.
2078 ath_tx_leak_count_update(sc, tid, bf);
2079 ath_tx_xmit_normal(sc, txq, bf);
2086 ath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni,
2087 struct ath_buf *bf, struct mbuf *m0,
2088 const struct ieee80211_bpf_params *params)
2090 struct ifnet *ifp = sc->sc_ifp;
2091 struct ieee80211com *ic = ifp->if_l2com;
2092 struct ath_hal *ah = sc->sc_ah;
2093 struct ieee80211vap *vap = ni->ni_vap;
2094 int error, ismcast, ismrr;
2095 int keyix, hdrlen, pktlen, try0, txantenna;
2096 u_int8_t rix, txrate;
2097 struct ieee80211_frame *wh;
2100 const HAL_RATE_TABLE *rt;
2101 struct ath_desc *ds;
2105 uint8_t type, subtype;
2108 ATH_TX_LOCK_ASSERT(sc);
2110 wh = mtod(m0, struct ieee80211_frame *);
2111 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
2112 hdrlen = ieee80211_anyhdrsize(wh);
2114 * Packet length must not include any
2115 * pad bytes; deduct them here.
2117 /* XXX honor IEEE80211_BPF_DATAPAD */
2118 pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN;
2120 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
2121 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
2123 ATH_KTR(sc, ATH_KTR_TX, 2,
2124 "ath_tx_raw_start: ni=%p, bf=%p, raw", ni, bf);
2126 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n",
2129 pri = params->ibp_pri & 3;
2130 /* Override pri if the frame isn't a QoS one */
2131 if (! IEEE80211_QOS_HAS_SEQ(wh))
2132 pri = ath_tx_getac(sc, m0);
2134 /* XXX If it's an ADDBA, override the correct queue */
2135 do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid);
2137 /* Map ADDBA to the correct priority */
2140 DPRINTF(sc, ATH_DEBUG_XMIT,
2141 "%s: overriding tid %d pri %d -> %d\n",
2142 __func__, o_tid, pri, TID_TO_WME_AC(o_tid));
2144 pri = TID_TO_WME_AC(o_tid);
2147 /* Handle encryption twiddling if needed */
2148 if (! ath_tx_tag_crypto(sc, ni,
2149 m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0,
2150 &hdrlen, &pktlen, &keyix)) {
2154 /* packet header may have moved, reset our local pointer */
2155 wh = mtod(m0, struct ieee80211_frame *);
2157 /* Do the generic frame setup */
2158 /* XXX should just bzero the bf_state? */
2159 bf->bf_state.bfs_dobaw = 0;
2161 error = ath_tx_dmasetup(sc, bf, m0);
2164 m0 = bf->bf_m; /* NB: may have changed */
2165 wh = mtod(m0, struct ieee80211_frame *);
2166 bf->bf_node = ni; /* NB: held reference */
2168 /* Always enable CLRDMASK for raw frames for now.. */
2169 flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */
2170 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
2171 if (params->ibp_flags & IEEE80211_BPF_RTS)
2172 flags |= HAL_TXDESC_RTSENA;
2173 else if (params->ibp_flags & IEEE80211_BPF_CTS) {
2174 /* XXX assume 11g/11n protection? */
2175 bf->bf_state.bfs_doprot = 1;
2176 flags |= HAL_TXDESC_CTSENA;
2178 /* XXX leave ismcast to injector? */
2179 if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast)
2180 flags |= HAL_TXDESC_NOACK;
2182 rt = sc->sc_currates;
2183 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
2184 rix = ath_tx_findrix(sc, params->ibp_rate0);
2185 txrate = rt->info[rix].rateCode;
2186 if (params->ibp_flags & IEEE80211_BPF_SHORTPRE)
2187 txrate |= rt->info[rix].shortPreamble;
2189 try0 = params->ibp_try0;
2190 ismrr = (params->ibp_try1 != 0);
2191 txantenna = params->ibp_pri >> 2;
2192 if (txantenna == 0) /* XXX? */
2193 txantenna = sc->sc_txantenna;
2196 * Since ctsrate is fixed, store it away for later
2197 * use when the descriptor fields are being set.
2199 if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA))
2200 bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate;
2203 * NB: we mark all packets as type PSPOLL so the h/w won't
2204 * set the sequence number, duration, etc.
2206 atype = HAL_PKT_TYPE_PSPOLL;
2208 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT))
2209 ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len,
2210 sc->sc_hwmap[rix].ieeerate, -1);
2212 if (ieee80211_radiotap_active_vap(vap)) {
2213 u_int64_t tsf = ath_hal_gettsf64(ah);
2215 sc->sc_tx_th.wt_tsf = htole64(tsf);
2216 sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags;
2217 if (wh->i_fc[1] & IEEE80211_FC1_WEP)
2218 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
2219 if (m0->m_flags & M_FRAG)
2220 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG;
2221 sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate;
2222 sc->sc_tx_th.wt_txpower = MIN(params->ibp_power,
2223 ieee80211_get_node_txpower(ni));
2224 sc->sc_tx_th.wt_antenna = sc->sc_txantenna;
2226 ieee80211_radiotap_tx(vap, m0);
2230 * Formulate first tx descriptor with tx controls.
2233 /* XXX check return value? */
2235 /* Store the decided rate index values away */
2236 bf->bf_state.bfs_pktlen = pktlen;
2237 bf->bf_state.bfs_hdrlen = hdrlen;
2238 bf->bf_state.bfs_atype = atype;
2239 bf->bf_state.bfs_txpower = MIN(params->ibp_power,
2240 ieee80211_get_node_txpower(ni));
2241 bf->bf_state.bfs_txrate0 = txrate;
2242 bf->bf_state.bfs_try0 = try0;
2243 bf->bf_state.bfs_keyix = keyix;
2244 bf->bf_state.bfs_txantenna = txantenna;
2245 bf->bf_state.bfs_txflags = flags;
2246 bf->bf_state.bfs_shpream =
2247 !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE);
2249 /* Set local packet state, used to queue packets to hardware */
2250 bf->bf_state.bfs_tid = WME_AC_TO_TID(pri);
2251 bf->bf_state.bfs_tx_queue = sc->sc_ac2q[pri]->axq_qnum;
2252 bf->bf_state.bfs_pri = pri;
2254 /* XXX this should be done in ath_tx_setrate() */
2255 bf->bf_state.bfs_ctsrate = 0;
2256 bf->bf_state.bfs_ctsduration = 0;
2257 bf->bf_state.bfs_ismrr = ismrr;
2259 /* Blank the legacy rate array */
2260 bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
2262 bf->bf_state.bfs_rc[0].rix =
2263 ath_tx_findrix(sc, params->ibp_rate0);
2264 bf->bf_state.bfs_rc[0].tries = try0;
2265 bf->bf_state.bfs_rc[0].ratecode = txrate;
2270 rix = ath_tx_findrix(sc, params->ibp_rate1);
2271 bf->bf_state.bfs_rc[1].rix = rix;
2272 bf->bf_state.bfs_rc[1].tries = params->ibp_try1;
2274 rix = ath_tx_findrix(sc, params->ibp_rate2);
2275 bf->bf_state.bfs_rc[2].rix = rix;
2276 bf->bf_state.bfs_rc[2].tries = params->ibp_try2;
2278 rix = ath_tx_findrix(sc, params->ibp_rate3);
2279 bf->bf_state.bfs_rc[3].rix = rix;
2280 bf->bf_state.bfs_rc[3].tries = params->ibp_try3;
2283 * All the required rate control decisions have been made;
2284 * fill in the rc flags.
2286 ath_tx_rate_fill_rcflags(sc, bf);
2288 /* NB: no buffered multicast in power save support */
2291 * If we're overiding the ADDBA destination, dump directly
2292 * into the hardware queue, right after any pending
2293 * frames to that node are.
2295 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n",
2296 __func__, do_override);
2300 * Put addba frames in the right place in the right TID/HWQ.
2303 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2305 * XXX if it's addba frames, should we be leaking
2306 * them out via the frame leak method?
2307 * XXX for now let's not risk it; but we may wish
2308 * to investigate this later.
2310 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2311 } else if (ath_tx_should_swq_frame(sc, ATH_NODE(ni), m0,
2313 /* Queue to software queue */
2314 ath_tx_swq(sc, ni, sc->sc_ac2q[pri], queue_to_head, bf);
2316 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2317 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2320 /* Direct-dispatch to the hardware */
2321 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2323 * Update the current leak count if
2324 * we're leaking frames; and set the
2325 * MORE flag as appropriate.
2327 ath_tx_leak_count_update(sc, tid, bf);
2328 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2336 * This can be called by net80211.
2339 ath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
2340 const struct ieee80211_bpf_params *params)
2342 struct ieee80211com *ic = ni->ni_ic;
2343 struct ifnet *ifp = ic->ic_ifp;
2344 struct ath_softc *sc = ifp->if_softc;
2346 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
2350 if (sc->sc_inreset_cnt > 0) {
2351 DPRINTF(sc, ATH_DEBUG_XMIT,
2352 "%s: sc_inreset_cnt > 0; bailing\n", __func__);
2357 sc->sc_txstart_cnt++;
2362 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->sc_invalid) {
2363 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, %s", __func__,
2364 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ?
2365 "!running" : "invalid");
2372 * Enforce how deep the multicast queue can grow.
2374 * XXX duplicated in ath_tx_start().
2376 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2377 if (sc->sc_cabq->axq_depth + sc->sc_cabq->fifo.axq_depth
2378 > sc->sc_txq_mcastq_maxdepth) {
2379 sc->sc_stats.ast_tx_mcastq_overflow++;
2390 * Grab a TX buffer and associated resources.
2392 bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT);
2394 sc->sc_stats.ast_tx_nobuf++;
2399 ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: m=%p, params=%p, bf=%p\n",
2402 if (params == NULL) {
2404 * Legacy path; interpret frame contents to decide
2405 * precisely how to send the frame.
2407 if (ath_tx_start(sc, ni, bf, m)) {
2408 error = EIO; /* XXX */
2413 * Caller supplied explicit parameters to use in
2414 * sending the frame.
2416 if (ath_tx_raw_start(sc, ni, bf, m, params)) {
2417 error = EIO; /* XXX */
2421 sc->sc_wd_timer = 5;
2423 sc->sc_stats.ast_tx_raw++;
2426 * Update the TIM - if there's anything queued to the
2427 * software queue and power save is enabled, we should
2430 ath_tx_update_tim(sc, ni, 1);
2435 sc->sc_txstart_cnt--;
2440 ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: bad2: m=%p, params=%p, "
2446 ath_returnbuf_head(sc, bf);
2447 ATH_TXBUF_UNLOCK(sc);
2453 sc->sc_txstart_cnt--;
2456 ATH_KTR(sc, ATH_KTR_TX, 2, "ath_raw_xmit: bad0: m=%p, params=%p",
2459 sc->sc_stats.ast_tx_raw_fail++;
2460 ieee80211_free_node(ni);
2465 /* Some helper functions */
2468 * ADDBA (and potentially others) need to be placed in the same
2469 * hardware queue as the TID/node it's relating to. This is so
2470 * it goes out after any pending non-aggregate frames to the
2473 * If this isn't done, the ADDBA can go out before the frames
2474 * queued in hardware. Even though these frames have a sequence
2475 * number -earlier- than the ADDBA can be transmitted (but
2476 * no frames whose sequence numbers are after the ADDBA should
2477 * be!) they'll arrive after the ADDBA - and the receiving end
2478 * will simply drop them as being out of the BAW.
2480 * The frames can't be appended to the TID software queue - it'll
2481 * never be sent out. So these frames have to be directly
2482 * dispatched to the hardware, rather than queued in software.
2483 * So if this function returns true, the TXQ has to be
2484 * overridden and it has to be directly dispatched.
2486 * It's a dirty hack, but someone's gotta do it.
2490 * XXX doesn't belong here!
2493 ieee80211_is_action(struct ieee80211_frame *wh)
2495 /* Type: Management frame? */
2496 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) !=
2497 IEEE80211_FC0_TYPE_MGT)
2500 /* Subtype: Action frame? */
2501 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) !=
2502 IEEE80211_FC0_SUBTYPE_ACTION)
2508 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
2510 * Return an alternate TID for ADDBA request frames.
2512 * Yes, this likely should be done in the net80211 layer.
2515 ath_tx_action_frame_override_queue(struct ath_softc *sc,
2516 struct ieee80211_node *ni,
2517 struct mbuf *m0, int *tid)
2519 struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *);
2520 struct ieee80211_action_ba_addbarequest *ia;
2522 uint16_t baparamset;
2524 /* Not action frame? Bail */
2525 if (! ieee80211_is_action(wh))
2528 /* XXX Not needed for frames we send? */
2530 /* Correct length? */
2531 if (! ieee80211_parse_action(ni, m))
2535 /* Extract out action frame */
2536 frm = (u_int8_t *)&wh[1];
2537 ia = (struct ieee80211_action_ba_addbarequest *) frm;
2539 /* Not ADDBA? Bail */
2540 if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA)
2542 if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST)
2545 /* Extract TID, return it */
2546 baparamset = le16toh(ia->rq_baparamset);
2547 *tid = (int) MS(baparamset, IEEE80211_BAPS_TID);
2553 /* Per-node software queue operations */
2556 * Add the current packet to the given BAW.
2557 * It is assumed that the current packet
2559 * + fits inside the BAW;
2560 * + already has had a sequence number allocated.
2562 * Since the BAW status may be modified by both the ath task and
2563 * the net80211/ifnet contexts, the TID must be locked.
2566 ath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an,
2567 struct ath_tid *tid, struct ath_buf *bf)
2570 struct ieee80211_tx_ampdu *tap;
2572 ATH_TX_LOCK_ASSERT(sc);
2574 if (bf->bf_state.bfs_isretried)
2577 tap = ath_tx_get_tx_tid(an, tid->tid);
2579 if (! bf->bf_state.bfs_dobaw) {
2580 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2581 "%s: dobaw=0, seqno=%d, window %d:%d\n",
2582 __func__, SEQNO(bf->bf_state.bfs_seqno),
2583 tap->txa_start, tap->txa_wnd);
2586 if (bf->bf_state.bfs_addedbaw)
2587 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2588 "%s: re-added? tid=%d, seqno %d; window %d:%d; "
2589 "baw head=%d tail=%d\n",
2590 __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2591 tap->txa_start, tap->txa_wnd, tid->baw_head,
2595 * Verify that the given sequence number is not outside of the
2596 * BAW. Complain loudly if that's the case.
2598 if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd,
2599 SEQNO(bf->bf_state.bfs_seqno))) {
2600 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2601 "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; "
2602 "baw head=%d tail=%d\n",
2603 __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2604 tap->txa_start, tap->txa_wnd, tid->baw_head,
2609 * ni->ni_txseqs[] is the currently allocated seqno.
2610 * the txa state contains the current baw start.
2612 index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno));
2613 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2614 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2615 "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d "
2616 "baw head=%d tail=%d\n",
2617 __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2618 tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head,
2623 assert(tid->tx_buf[cindex] == NULL);
2625 if (tid->tx_buf[cindex] != NULL) {
2626 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2627 "%s: ba packet dup (index=%d, cindex=%d, "
2628 "head=%d, tail=%d)\n",
2629 __func__, index, cindex, tid->baw_head, tid->baw_tail);
2630 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2631 "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n",
2633 tid->tx_buf[cindex],
2634 SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno),
2636 SEQNO(bf->bf_state.bfs_seqno)
2639 tid->tx_buf[cindex] = bf;
2641 if (index >= ((tid->baw_tail - tid->baw_head) &
2642 (ATH_TID_MAX_BUFS - 1))) {
2643 tid->baw_tail = cindex;
2644 INCR(tid->baw_tail, ATH_TID_MAX_BUFS);
2649 * Flip the BAW buffer entry over from the existing one to the new one.
2651 * When software retransmitting a (sub-)frame, it is entirely possible that
2652 * the frame ath_buf is marked as BUSY and can't be immediately reused.
2653 * In that instance the buffer is cloned and the new buffer is used for
2654 * retransmit. We thus need to update the ath_buf slot in the BAW buf
2655 * tracking array to maintain consistency.
2658 ath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an,
2659 struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf)
2662 struct ieee80211_tx_ampdu *tap;
2663 int seqno = SEQNO(old_bf->bf_state.bfs_seqno);
2665 ATH_TX_LOCK_ASSERT(sc);
2667 tap = ath_tx_get_tx_tid(an, tid->tid);
2668 index = ATH_BA_INDEX(tap->txa_start, seqno);
2669 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2672 * Just warn for now; if it happens then we should find out
2673 * about it. It's highly likely the aggregation session will
2676 if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) {
2677 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2678 "%s: retransmitted buffer"
2679 " has mismatching seqno's, BA session may hang.\n",
2681 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2682 "%s: old seqno=%d, new_seqno=%d\n", __func__,
2683 old_bf->bf_state.bfs_seqno, new_bf->bf_state.bfs_seqno);
2686 if (tid->tx_buf[cindex] != old_bf) {
2687 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2688 "%s: ath_buf pointer incorrect; "
2689 " has m BA session may hang.\n", __func__);
2690 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2691 "%s: old bf=%p, new bf=%p\n", __func__, old_bf, new_bf);
2694 tid->tx_buf[cindex] = new_bf;
2698 * seq_start - left edge of BAW
2699 * seq_next - current/next sequence number to allocate
2701 * Since the BAW status may be modified by both the ath task and
2702 * the net80211/ifnet contexts, the TID must be locked.
2705 ath_tx_update_baw(struct ath_softc *sc, struct ath_node *an,
2706 struct ath_tid *tid, const struct ath_buf *bf)
2709 struct ieee80211_tx_ampdu *tap;
2710 int seqno = SEQNO(bf->bf_state.bfs_seqno);
2712 ATH_TX_LOCK_ASSERT(sc);
2714 tap = ath_tx_get_tx_tid(an, tid->tid);
2715 index = ATH_BA_INDEX(tap->txa_start, seqno);
2716 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2718 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2719 "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, "
2720 "baw head=%d, tail=%d\n",
2721 __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index,
2722 cindex, tid->baw_head, tid->baw_tail);
2725 * If this occurs then we have a big problem - something else
2726 * has slid tap->txa_start along without updating the BAW
2727 * tracking start/end pointers. Thus the TX BAW state is now
2728 * completely busted.
2730 * But for now, since I haven't yet fixed TDMA and buffer cloning,
2731 * it's quite possible that a cloned buffer is making its way
2732 * here and causing it to fire off. Disable TDMA for now.
2734 if (tid->tx_buf[cindex] != bf) {
2735 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2736 "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n",
2737 __func__, bf, SEQNO(bf->bf_state.bfs_seqno),
2738 tid->tx_buf[cindex],
2739 (tid->tx_buf[cindex] != NULL) ?
2740 SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno) : -1);
2743 tid->tx_buf[cindex] = NULL;
2745 while (tid->baw_head != tid->baw_tail &&
2746 !tid->tx_buf[tid->baw_head]) {
2747 INCR(tap->txa_start, IEEE80211_SEQ_RANGE);
2748 INCR(tid->baw_head, ATH_TID_MAX_BUFS);
2750 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2751 "%s: baw is now %d:%d, baw head=%d\n",
2752 __func__, tap->txa_start, tap->txa_wnd, tid->baw_head);
2756 ath_tx_leak_count_update(struct ath_softc *sc, struct ath_tid *tid,
2759 struct ieee80211_frame *wh;
2761 ATH_TX_LOCK_ASSERT(sc);
2763 if (tid->an->an_leak_count > 0) {
2764 wh = mtod(bf->bf_m, struct ieee80211_frame *);
2767 * Update MORE based on the software/net80211 queue states.
2769 if ((tid->an->an_stack_psq > 0)
2770 || (tid->an->an_swq_depth > 0))
2771 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
2773 wh->i_fc[1] &= ~IEEE80211_FC1_MORE_DATA;
2775 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
2776 "%s: %6D: leak count = %d, psq=%d, swq=%d, MORE=%d\n",
2778 tid->an->an_node.ni_macaddr,
2780 tid->an->an_leak_count,
2781 tid->an->an_stack_psq,
2782 tid->an->an_swq_depth,
2783 !! (wh->i_fc[1] & IEEE80211_FC1_MORE_DATA));
2786 * Re-sync the underlying buffer.
2788 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap,
2789 BUS_DMASYNC_PREWRITE);
2791 tid->an->an_leak_count --;
2796 ath_tx_tid_can_tx_or_sched(struct ath_softc *sc, struct ath_tid *tid)
2799 ATH_TX_LOCK_ASSERT(sc);
2801 if (tid->an->an_leak_count > 0) {
2810 * Mark the current node/TID as ready to TX.
2812 * This is done to make it easy for the software scheduler to
2813 * find which nodes have data to send.
2815 * The TXQ lock must be held.
2818 ath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid)
2820 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
2822 ATH_TX_LOCK_ASSERT(sc);
2825 * If we are leaking out a frame to this destination
2826 * for PS-POLL, ensure that we allow scheduling to
2829 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
2830 return; /* paused, can't schedule yet */
2833 return; /* already scheduled */
2839 * If this is a sleeping node we're leaking to, given
2840 * it a higher priority. This is so bad for QoS it hurts.
2842 if (tid->an->an_leak_count) {
2843 TAILQ_INSERT_HEAD(&txq->axq_tidq, tid, axq_qelem);
2845 TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem);
2850 * We can't do the above - it'll confuse the TXQ software
2851 * scheduler which will keep checking the _head_ TID
2852 * in the list to see if it has traffic. If we queue
2853 * a TID to the head of the list and it doesn't transmit,
2854 * we'll check it again.
2856 * So, get the rest of this leaking frames support working
2857 * and reliable first and _then_ optimise it so they're
2858 * pushed out in front of any other pending software
2861 TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem);
2865 * Mark the current node as no longer needing to be polled for
2868 * The TXQ lock must be held.
2871 ath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid)
2873 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
2875 ATH_TX_LOCK_ASSERT(sc);
2877 if (tid->sched == 0)
2881 TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem);
2885 * Assign a sequence number manually to the given frame.
2887 * This should only be called for A-MPDU TX frames.
2889 static ieee80211_seq
2890 ath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni,
2891 struct ath_buf *bf, struct mbuf *m0)
2893 struct ieee80211_frame *wh;
2895 ieee80211_seq seqno;
2899 wh = mtod(m0, struct ieee80211_frame *);
2900 pri = M_WME_GETAC(m0); /* honor classification */
2901 tid = WME_AC_TO_TID(pri);
2902 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n",
2903 __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh));
2905 /* XXX Is it a control frame? Ignore */
2907 /* Does the packet require a sequence number? */
2908 if (! IEEE80211_QOS_HAS_SEQ(wh))
2911 ATH_TX_LOCK_ASSERT(sc);
2914 * Is it a QOS NULL Data frame? Give it a sequence number from
2915 * the default TID (IEEE80211_NONQOS_TID.)
2917 * The RX path of everything I've looked at doesn't include the NULL
2918 * data frame sequence number in the aggregation state updates, so
2919 * assigning it a sequence number there will cause a BAW hole on the
2922 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
2923 if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) {
2924 /* XXX no locking for this TID? This is a bit of a problem. */
2925 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID];
2926 INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE);
2928 /* Manually assign sequence number */
2929 seqno = ni->ni_txseqs[tid];
2930 INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE);
2932 *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
2933 M_SEQNO_SET(m0, seqno);
2935 /* Return so caller can do something with it if needed */
2936 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno);
2941 * Attempt to direct dispatch an aggregate frame to hardware.
2942 * If the frame is out of BAW, queue.
2943 * Otherwise, schedule it as a single frame.
2946 ath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an,
2947 struct ath_txq *txq, struct ath_buf *bf)
2949 struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid];
2950 struct ieee80211_tx_ampdu *tap;
2952 ATH_TX_LOCK_ASSERT(sc);
2954 tap = ath_tx_get_tx_tid(an, tid->tid);
2957 if (! ath_tx_tid_can_tx_or_sched(sc, tid)) {
2958 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
2959 /* XXX don't sched - we're paused! */
2963 /* outside baw? queue */
2964 if (bf->bf_state.bfs_dobaw &&
2965 (! BAW_WITHIN(tap->txa_start, tap->txa_wnd,
2966 SEQNO(bf->bf_state.bfs_seqno)))) {
2967 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
2968 ath_tx_tid_sched(sc, tid);
2973 * This is a temporary check and should be removed once
2974 * all the relevant code paths have been fixed.
2976 * During aggregate retries, it's possible that the head
2977 * frame will fail (which has the bfs_aggr and bfs_nframes
2978 * fields set for said aggregate) and will be retried as
2979 * a single frame. In this instance, the values should
2980 * be reset or the completion code will get upset with you.
2982 if (bf->bf_state.bfs_aggr != 0 || bf->bf_state.bfs_nframes > 1) {
2983 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
2984 "%s: bfs_aggr=%d, bfs_nframes=%d\n", __func__,
2985 bf->bf_state.bfs_aggr, bf->bf_state.bfs_nframes);
2986 bf->bf_state.bfs_aggr = 0;
2987 bf->bf_state.bfs_nframes = 1;
2990 /* Update CLRDMASK just before this frame is queued */
2991 ath_tx_update_clrdmask(sc, tid, bf);
2993 /* Direct dispatch to hardware */
2994 ath_tx_do_ratelookup(sc, bf);
2995 ath_tx_calc_duration(sc, bf);
2996 ath_tx_calc_protection(sc, bf);
2997 ath_tx_set_rtscts(sc, bf);
2998 ath_tx_rate_fill_rcflags(sc, bf);
2999 ath_tx_setds(sc, bf);
3002 sc->sc_aggr_stats.aggr_low_hwq_single_pkt++;
3004 /* Track per-TID hardware queue depth correctly */
3008 if (bf->bf_state.bfs_dobaw) {
3009 ath_tx_addto_baw(sc, an, tid, bf);
3010 bf->bf_state.bfs_addedbaw = 1;
3013 /* Set completion handler, multi-frame aggregate or not */
3014 bf->bf_comp = ath_tx_aggr_comp;
3017 * Update the current leak count if
3018 * we're leaking frames; and set the
3019 * MORE flag as appropriate.
3021 ath_tx_leak_count_update(sc, tid, bf);
3023 /* Hand off to hardware */
3024 ath_tx_handoff(sc, txq, bf);
3028 * Attempt to send the packet.
3029 * If the queue isn't busy, direct-dispatch.
3030 * If the queue is busy enough, queue the given packet on the
3031 * relevant software queue.
3034 ath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni,
3035 struct ath_txq *txq, int queue_to_head, struct ath_buf *bf)
3037 struct ath_node *an = ATH_NODE(ni);
3038 struct ieee80211_frame *wh;
3039 struct ath_tid *atid;
3041 struct mbuf *m0 = bf->bf_m;
3043 ATH_TX_LOCK_ASSERT(sc);
3045 /* Fetch the TID - non-QoS frames get assigned to TID 16 */
3046 wh = mtod(m0, struct ieee80211_frame *);
3047 pri = ath_tx_getac(sc, m0);
3048 tid = ath_tx_gettid(sc, m0);
3049 atid = &an->an_tid[tid];
3051 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n",
3052 __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh));
3054 /* Set local packet state, used to queue packets to hardware */
3055 /* XXX potentially duplicate info, re-check */
3056 bf->bf_state.bfs_tid = tid;
3057 bf->bf_state.bfs_tx_queue = txq->axq_qnum;
3058 bf->bf_state.bfs_pri = pri;
3061 * If the hardware queue isn't busy, queue it directly.
3062 * If the hardware queue is busy, queue it.
3063 * If the TID is paused or the traffic it outside BAW, software
3066 * If the node is in power-save and we're leaking a frame,
3067 * leak a single frame.
3069 if (! ath_tx_tid_can_tx_or_sched(sc, atid)) {
3070 /* TID is paused, queue */
3071 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__);
3073 * If the caller requested that it be sent at a high
3074 * priority, queue it at the head of the list.
3077 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
3079 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3080 } else if (ath_tx_ampdu_pending(sc, an, tid)) {
3081 /* AMPDU pending; queue */
3082 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__);
3083 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3085 } else if (ath_tx_ampdu_running(sc, an, tid)) {
3086 /* AMPDU running, attempt direct dispatch if possible */
3089 * Always queue the frame to the tail of the list.
3091 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3094 * If the hardware queue isn't busy, direct dispatch
3095 * the head frame in the list. Don't schedule the
3096 * TID - let it build some more frames first?
3098 * When running A-MPDU, always just check the hardware
3099 * queue depth against the aggregate frame limit.
3100 * We don't want to burst a large number of single frames
3101 * out to the hardware; we want to aggressively hold back.
3103 * Otherwise, schedule the TID.
3105 /* XXX TXQ locking */
3106 if (txq->axq_depth + txq->fifo.axq_depth < sc->sc_hwq_limit_aggr) {
3107 bf = ATH_TID_FIRST(atid);
3108 ATH_TID_REMOVE(atid, bf, bf_list);
3111 * Ensure it's definitely treated as a non-AMPDU
3112 * frame - this information may have been left
3113 * over from a previous attempt.
3115 bf->bf_state.bfs_aggr = 0;
3116 bf->bf_state.bfs_nframes = 1;
3118 /* Queue to the hardware */
3119 ath_tx_xmit_aggr(sc, an, txq, bf);
3120 DPRINTF(sc, ATH_DEBUG_SW_TX,
3124 DPRINTF(sc, ATH_DEBUG_SW_TX,
3125 "%s: ampdu; swq'ing\n",
3128 ath_tx_tid_sched(sc, atid);
3131 * If we're not doing A-MPDU, be prepared to direct dispatch
3132 * up to both limits if possible. This particular corner
3133 * case may end up with packet starvation between aggregate
3134 * traffic and non-aggregate traffic: we wnat to ensure
3135 * that non-aggregate stations get a few frames queued to the
3136 * hardware before the aggregate station(s) get their chance.
3138 * So if you only ever see a couple of frames direct dispatched
3139 * to the hardware from a non-AMPDU client, check both here
3140 * and in the software queue dispatcher to ensure that those
3141 * non-AMPDU stations get a fair chance to transmit.
3143 /* XXX TXQ locking */
3144 } else if ((txq->axq_depth + txq->fifo.axq_depth < sc->sc_hwq_limit_nonaggr) &&
3145 (txq->axq_aggr_depth < sc->sc_hwq_limit_aggr)) {
3146 /* AMPDU not running, attempt direct dispatch */
3147 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__);
3148 /* See if clrdmask needs to be set */
3149 ath_tx_update_clrdmask(sc, atid, bf);
3152 * Update the current leak count if
3153 * we're leaking frames; and set the
3154 * MORE flag as appropriate.
3156 ath_tx_leak_count_update(sc, atid, bf);
3159 * Dispatch the frame.
3161 ath_tx_xmit_normal(sc, txq, bf);
3164 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__);
3165 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3166 ath_tx_tid_sched(sc, atid);
3171 * Only set the clrdmask bit if none of the nodes are currently
3174 * XXX TODO: go through all the callers and check to see
3175 * which are being called in the context of looping over all
3176 * TIDs (eg, if all tids are being paused, resumed, etc.)
3177 * That'll avoid O(n^2) complexity here.
3180 ath_tx_set_clrdmask(struct ath_softc *sc, struct ath_node *an)
3184 ATH_TX_LOCK_ASSERT(sc);
3186 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
3187 if (an->an_tid[i].isfiltered == 1)
3194 * Configure the per-TID node state.
3196 * This likely belongs in if_ath_node.c but I can't think of anywhere
3197 * else to put it just yet.
3199 * This sets up the SLISTs and the mutex as appropriate.
3202 ath_tx_tid_init(struct ath_softc *sc, struct ath_node *an)
3205 struct ath_tid *atid;
3207 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
3208 atid = &an->an_tid[i];
3210 /* XXX now with this bzer(), is the field 0'ing needed? */
3211 bzero(atid, sizeof(*atid));
3213 TAILQ_INIT(&atid->tid_q);
3214 TAILQ_INIT(&atid->filtq.tid_q);
3217 for (j = 0; j < ATH_TID_MAX_BUFS; j++)
3218 atid->tx_buf[j] = NULL;
3219 atid->baw_head = atid->baw_tail = 0;
3222 atid->hwq_depth = 0;
3223 atid->cleanup_inprogress = 0;
3224 if (i == IEEE80211_NONQOS_TID)
3225 atid->ac = ATH_NONQOS_TID_AC;
3227 atid->ac = TID_TO_WME_AC(i);
3229 an->clrdmask = 1; /* Always start by setting this bit */
3233 * Pause the current TID. This stops packets from being transmitted
3236 * Since this is also called from upper layers as well as the driver,
3237 * it will get the TID lock.
3240 ath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid)
3243 ATH_TX_LOCK_ASSERT(sc);
3245 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: paused = %d\n",
3246 __func__, tid->paused);
3250 * Unpause the current TID, and schedule it if needed.
3253 ath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid)
3255 ATH_TX_LOCK_ASSERT(sc);
3258 * There's some odd places where ath_tx_tid_resume() is called
3259 * when it shouldn't be; this works around that particular issue
3260 * until it's actually resolved.
3262 if (tid->paused == 0) {
3263 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
3264 "%s: %6D: paused=0?\n", __func__,
3265 tid->an->an_node.ni_macaddr, ":");
3270 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: unpaused = %d\n",
3271 __func__, tid->paused);
3277 * Override the clrdmask configuration for the next frame
3278 * from this TID, just to get the ball rolling.
3280 ath_tx_set_clrdmask(sc, tid->an);
3282 if (tid->axq_depth == 0)
3285 /* XXX isfiltered shouldn't ever be 0 at this point */
3286 if (tid->isfiltered == 1) {
3287 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: filtered?!\n",
3292 ath_tx_tid_sched(sc, tid);
3295 * Queue the software TX scheduler.
3297 ath_tx_swq_kick(sc);
3301 * Add the given ath_buf to the TID filtered frame list.
3302 * This requires the TID be filtered.
3305 ath_tx_tid_filt_addbuf(struct ath_softc *sc, struct ath_tid *tid,
3309 ATH_TX_LOCK_ASSERT(sc);
3311 if (!tid->isfiltered)
3312 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: not filtered?!\n",
3315 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: bf=%p\n", __func__, bf);
3317 /* Set the retry bit and bump the retry counter */
3318 ath_tx_set_retry(sc, bf);
3319 sc->sc_stats.ast_tx_swfiltered++;
3321 ATH_TID_FILT_INSERT_TAIL(tid, bf, bf_list);
3325 * Handle a completed filtered frame from the given TID.
3326 * This just enables/pauses the filtered frame state if required
3327 * and appends the filtered frame to the filtered queue.
3330 ath_tx_tid_filt_comp_buf(struct ath_softc *sc, struct ath_tid *tid,
3334 ATH_TX_LOCK_ASSERT(sc);
3336 if (! tid->isfiltered) {
3337 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: filter transition\n",
3339 tid->isfiltered = 1;
3340 ath_tx_tid_pause(sc, tid);
3343 /* Add the frame to the filter queue */
3344 ath_tx_tid_filt_addbuf(sc, tid, bf);
3348 * Complete the filtered frame TX completion.
3350 * If there are no more frames in the hardware queue, unpause/unfilter
3351 * the TID if applicable. Otherwise we will wait for a node PS transition
3355 ath_tx_tid_filt_comp_complete(struct ath_softc *sc, struct ath_tid *tid)
3359 ATH_TX_LOCK_ASSERT(sc);
3361 if (tid->hwq_depth != 0)
3364 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: hwq=0, transition back\n",
3366 tid->isfiltered = 0;
3367 /* XXX ath_tx_tid_resume() also calls ath_tx_set_clrdmask()! */
3368 ath_tx_set_clrdmask(sc, tid->an);
3370 /* XXX this is really quite inefficient */
3371 while ((bf = ATH_TID_FILT_LAST(tid, ath_bufhead_s)) != NULL) {
3372 ATH_TID_FILT_REMOVE(tid, bf, bf_list);
3373 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
3376 ath_tx_tid_resume(sc, tid);
3380 * Called when a single (aggregate or otherwise) frame is completed.
3382 * Returns 1 if the buffer could be added to the filtered list
3383 * (cloned or otherwise), 0 if the buffer couldn't be added to the
3384 * filtered list (failed clone; expired retry) and the caller should
3385 * free it and handle it like a failure (eg by sending a BAR.)
3388 ath_tx_tid_filt_comp_single(struct ath_softc *sc, struct ath_tid *tid,
3391 struct ath_buf *nbf;
3394 ATH_TX_LOCK_ASSERT(sc);
3397 * Don't allow a filtered frame to live forever.
3399 if (bf->bf_state.bfs_retries > SWMAX_RETRIES) {
3400 sc->sc_stats.ast_tx_swretrymax++;
3401 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3402 "%s: bf=%p, seqno=%d, exceeded retries\n",
3405 bf->bf_state.bfs_seqno);
3410 * A busy buffer can't be added to the retry list.
3411 * It needs to be cloned.
3413 if (bf->bf_flags & ATH_BUF_BUSY) {
3414 nbf = ath_tx_retry_clone(sc, tid->an, tid, bf);
3415 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3416 "%s: busy buffer clone: %p -> %p\n",
3423 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3424 "%s: busy buffer couldn't be cloned (%p)!\n",
3428 ath_tx_tid_filt_comp_buf(sc, tid, nbf);
3431 ath_tx_tid_filt_comp_complete(sc, tid);
3437 ath_tx_tid_filt_comp_aggr(struct ath_softc *sc, struct ath_tid *tid,
3438 struct ath_buf *bf_first, ath_bufhead *bf_q)
3440 struct ath_buf *bf, *bf_next, *nbf;
3442 ATH_TX_LOCK_ASSERT(sc);
3446 bf_next = bf->bf_next;
3447 bf->bf_next = NULL; /* Remove it from the aggr list */
3450 * Don't allow a filtered frame to live forever.
3452 if (bf->bf_state.bfs_retries > SWMAX_RETRIES) {
3453 sc->sc_stats.ast_tx_swretrymax++;
3454 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3455 "%s: bf=%p, seqno=%d, exceeded retries\n",
3458 bf->bf_state.bfs_seqno);
3459 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
3463 if (bf->bf_flags & ATH_BUF_BUSY) {
3464 nbf = ath_tx_retry_clone(sc, tid->an, tid, bf);
3465 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3466 "%s: busy buffer cloned: %p -> %p",
3473 * If the buffer couldn't be cloned, add it to bf_q;
3474 * the caller will free the buffer(s) as required.
3477 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3478 "%s: buffer couldn't be cloned! (%p)\n",
3480 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
3482 ath_tx_tid_filt_comp_buf(sc, tid, nbf);
3488 ath_tx_tid_filt_comp_complete(sc, tid);
3492 * Suspend the queue because we need to TX a BAR.
3495 ath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid)
3498 ATH_TX_LOCK_ASSERT(sc);
3500 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3501 "%s: tid=%d, bar_wait=%d, bar_tx=%d, called\n",
3507 /* We shouldn't be called when bar_tx is 1 */
3509 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3510 "%s: bar_tx is 1?!\n", __func__);
3513 /* If we've already been called, just be patient. */
3520 /* Only one pause, no matter how many frames fail */
3521 ath_tx_tid_pause(sc, tid);
3525 * We've finished with BAR handling - either we succeeded or
3526 * failed. Either way, unsuspend TX.
3529 ath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid)
3532 ATH_TX_LOCK_ASSERT(sc);
3534 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3535 "%s: %6D: TID=%d, called\n",
3537 tid->an->an_node.ni_macaddr,
3541 if (tid->bar_tx == 0 || tid->bar_wait == 0) {
3542 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3543 "%s: %6D: TID=%d, bar_tx=%d, bar_wait=%d: ?\n",
3544 __func__, tid->an->an_node.ni_macaddr, ":",
3545 tid->tid, tid->bar_tx, tid->bar_wait);
3548 tid->bar_tx = tid->bar_wait = 0;
3549 ath_tx_tid_resume(sc, tid);
3553 * Return whether we're ready to TX a BAR frame.
3555 * Requires the TID lock be held.
3558 ath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid)
3561 ATH_TX_LOCK_ASSERT(sc);
3563 if (tid->bar_wait == 0 || tid->hwq_depth > 0)
3566 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3567 "%s: %6D: TID=%d, bar ready\n",
3569 tid->an->an_node.ni_macaddr,
3577 * Check whether the current TID is ready to have a BAR
3578 * TXed and if so, do the TX.
3580 * Since the TID/TXQ lock can't be held during a call to
3581 * ieee80211_send_bar(), we have to do the dirty thing of unlocking it,
3582 * sending the BAR and locking it again.
3584 * Eventually, the code to send the BAR should be broken out
3585 * from this routine so the lock doesn't have to be reacquired
3586 * just to be immediately dropped by the caller.
3589 ath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid)
3591 struct ieee80211_tx_ampdu *tap;
3593 ATH_TX_LOCK_ASSERT(sc);
3595 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3596 "%s: %6D: TID=%d, called\n",
3598 tid->an->an_node.ni_macaddr,
3602 tap = ath_tx_get_tx_tid(tid->an, tid->tid);
3605 * This is an error condition!
3607 if (tid->bar_wait == 0 || tid->bar_tx == 1) {
3608 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3609 "%s: %6D: TID=%d, bar_tx=%d, bar_wait=%d: ?\n",
3610 __func__, tid->an->an_node.ni_macaddr, ":",
3611 tid->tid, tid->bar_tx, tid->bar_wait);
3615 /* Don't do anything if we still have pending frames */
3616 if (tid->hwq_depth > 0) {
3617 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3618 "%s: %6D: TID=%d, hwq_depth=%d, waiting\n",
3620 tid->an->an_node.ni_macaddr,
3627 /* We're now about to TX */
3631 * Override the clrdmask configuration for the next frame,
3632 * just to get the ball rolling.
3634 ath_tx_set_clrdmask(sc, tid->an);
3637 * Calculate new BAW left edge, now that all frames have either
3638 * succeeded or failed.
3640 * XXX verify this is _actually_ the valid value to begin at!
3642 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3643 "%s: %6D: TID=%d, new BAW left edge=%d\n",
3645 tid->an->an_node.ni_macaddr,
3650 /* Try sending the BAR frame */
3651 /* We can't hold the lock here! */
3654 if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) {
3655 /* Success? Now we wait for notification that it's done */
3660 /* Failure? For now, warn loudly and continue */
3662 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3663 "%s: %6D: TID=%d, failed to TX BAR, continue!\n",
3664 __func__, tid->an->an_node.ni_macaddr, ":",
3666 ath_tx_tid_bar_unsuspend(sc, tid);
3670 ath_tx_tid_drain_pkt(struct ath_softc *sc, struct ath_node *an,
3671 struct ath_tid *tid, ath_bufhead *bf_cq, struct ath_buf *bf)
3674 ATH_TX_LOCK_ASSERT(sc);
3677 * If the current TID is running AMPDU, update
3680 if (ath_tx_ampdu_running(sc, an, tid->tid) &&
3681 bf->bf_state.bfs_dobaw) {
3683 * Only remove the frame from the BAW if it's
3684 * been transmitted at least once; this means
3685 * the frame was in the BAW to begin with.
3687 if (bf->bf_state.bfs_retries > 0) {
3688 ath_tx_update_baw(sc, an, tid, bf);
3689 bf->bf_state.bfs_dobaw = 0;
3693 * This has become a non-fatal error now
3695 if (! bf->bf_state.bfs_addedbaw)
3696 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW
3697 "%s: wasn't added: seqno %d\n",
3698 __func__, SEQNO(bf->bf_state.bfs_seqno));
3702 /* Strip it out of an aggregate list if it was in one */
3705 /* Insert on the free queue to be freed by the caller */
3706 TAILQ_INSERT_TAIL(bf_cq, bf, bf_list);
3710 ath_tx_tid_drain_print(struct ath_softc *sc, struct ath_node *an,
3711 const char *pfx, struct ath_tid *tid, struct ath_buf *bf)
3713 struct ieee80211_node *ni = &an->an_node;
3714 struct ath_txq *txq;
3715 struct ieee80211_tx_ampdu *tap;
3717 txq = sc->sc_ac2q[tid->ac];
3718 tap = ath_tx_get_tx_tid(an, tid->tid);
3720 DPRINTF(sc, ATH_DEBUG_SW_TX,
3721 "%s: %s: %6D: bf=%p: addbaw=%d, dobaw=%d, "
3722 "seqno=%d, retry=%d\n",
3728 bf->bf_state.bfs_addedbaw,
3729 bf->bf_state.bfs_dobaw,
3730 SEQNO(bf->bf_state.bfs_seqno),
3731 bf->bf_state.bfs_retries);
3732 DPRINTF(sc, ATH_DEBUG_SW_TX,
3733 "%s: %s: %6D: bf=%p: txq[%d] axq_depth=%d, axq_aggr_depth=%d\n",
3741 txq->axq_aggr_depth);
3742 DPRINTF(sc, ATH_DEBUG_SW_TX,
3743 "%s: %s: %6D: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d, "
3754 DPRINTF(sc, ATH_DEBUG_SW_TX,
3755 "%s: %s: %6D: tid %d: "
3756 "sched=%d, paused=%d, "
3757 "incomp=%d, baw_head=%d, "
3758 "baw_tail=%d txa_start=%d, ni_txseqs=%d\n",
3764 tid->sched, tid->paused,
3765 tid->incomp, tid->baw_head,
3766 tid->baw_tail, tap == NULL ? -1 : tap->txa_start,
3767 ni->ni_txseqs[tid->tid]);
3769 /* XXX Dump the frame, see what it is? */
3770 ieee80211_dump_pkt(ni->ni_ic,
3771 mtod(bf->bf_m, const uint8_t *),
3772 bf->bf_m->m_len, 0, -1);
3776 * Free any packets currently pending in the software TX queue.
3778 * This will be called when a node is being deleted.
3780 * It can also be called on an active node during an interface
3781 * reset or state transition.
3783 * (From Linux/reference):
3785 * TODO: For frame(s) that are in the retry state, we will reuse the
3786 * sequence number(s) without setting the retry bit. The
3787 * alternative is to give up on these and BAR the receiver's window
3791 ath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an,
3792 struct ath_tid *tid, ath_bufhead *bf_cq)
3795 struct ieee80211_tx_ampdu *tap;
3796 struct ieee80211_node *ni = &an->an_node;
3799 tap = ath_tx_get_tx_tid(an, tid->tid);
3801 ATH_TX_LOCK_ASSERT(sc);
3803 /* Walk the queue, free frames */
3806 bf = ATH_TID_FIRST(tid);
3812 ath_tx_tid_drain_print(sc, an, "norm", tid, bf);
3816 ATH_TID_REMOVE(tid, bf, bf_list);
3817 ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf);
3820 /* And now, drain the filtered frame queue */
3823 bf = ATH_TID_FILT_FIRST(tid);
3828 ath_tx_tid_drain_print(sc, an, "filt", tid, bf);
3832 ATH_TID_FILT_REMOVE(tid, bf, bf_list);
3833 ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf);
3837 * Override the clrdmask configuration for the next frame
3838 * in case there is some future transmission, just to get
3841 * This won't hurt things if the TID is about to be freed.
3843 ath_tx_set_clrdmask(sc, tid->an);
3846 * Now that it's completed, grab the TID lock and update
3847 * the sequence number and BAW window.
3848 * Because sequence numbers have been assigned to frames
3849 * that haven't been sent yet, it's entirely possible
3850 * we'll be called with some pending frames that have not
3853 * The cleaner solution is to do the sequence number allocation
3854 * when the packet is first transmitted - and thus the "retries"
3855 * check above would be enough to update the BAW/seqno.
3858 /* But don't do it for non-QoS TIDs */
3861 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
3862 "%s: %6D: node %p: TID %d: sliding BAW left edge to %d\n",
3870 ni->ni_txseqs[tid->tid] = tap->txa_start;
3871 tid->baw_tail = tid->baw_head;
3876 * Reset the TID state. This must be only called once the node has
3877 * had its frames flushed from this TID, to ensure that no other
3878 * pause / unpause logic can kick in.
3881 ath_tx_tid_reset(struct ath_softc *sc, struct ath_tid *tid)
3885 tid->bar_wait = tid->bar_tx = tid->isfiltered = 0;
3886 tid->paused = tid->sched = tid->addba_tx_pending = 0;
3887 tid->incomp = tid->cleanup_inprogress = 0;
3891 * If we have a bar_wait set, we need to unpause the TID
3892 * here. Otherwise once cleanup has finished, the TID won't
3893 * have the right paused counter.
3895 * XXX I'm not going through resume here - I don't want the
3896 * node to be rescheuled just yet. This however should be
3899 if (tid->bar_wait) {
3900 if (tid->paused > 0) {
3906 * XXX same with a currently filtered TID.
3908 * Since this is being called during a flush, we assume that
3909 * the filtered frame list is actually empty.
3911 * XXX TODO: add in a check to ensure that the filtered queue
3912 * depth is actually 0!
3914 if (tid->isfiltered) {
3915 if (tid->paused > 0) {
3921 * Clear BAR, filtered frames, scheduled and ADDBA pending.
3922 * The TID may be going through cleanup from the last association
3923 * where things in the BAW are still in the hardware queue.
3927 tid->isfiltered = 0;
3929 tid->addba_tx_pending = 0;
3932 * XXX TODO: it may just be enough to walk the HWQs and mark
3933 * frames for that node as non-aggregate; or mark the ath_node
3934 * with something that indicates that aggregation is no longer
3935 * occuring. Then we can just toss the BAW complaints and
3936 * do a complete hard reset of state here - no pause, no
3937 * complete counter, etc.
3943 * Flush all software queued packets for the given node.
3945 * This occurs when a completion handler frees the last buffer
3946 * for a node, and the node is thus freed. This causes the node
3947 * to be cleaned up, which ends up calling ath_tx_node_flush.
3950 ath_tx_node_flush(struct ath_softc *sc, struct ath_node *an)
3958 ATH_KTR(sc, ATH_KTR_NODE, 1, "ath_tx_node_flush: flush node; ni=%p",
3962 DPRINTF(sc, ATH_DEBUG_NODE,
3963 "%s: %6D: flush; is_powersave=%d, stack_psq=%d, tim=%d, "
3964 "swq_depth=%d, clrdmask=%d, leak_count=%d\n",
3966 an->an_node.ni_macaddr,
3968 an->an_is_powersave,
3975 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
3976 struct ath_tid *atid = &an->an_tid[tid];
3979 ath_tx_tid_drain(sc, an, atid, &bf_cq);
3981 /* Remove this tid from the list of active tids */
3982 ath_tx_tid_unsched(sc, atid);
3984 /* Reset the per-TID pause, BAR, etc state */
3985 ath_tx_tid_reset(sc, atid);
3989 * Clear global leak count
3991 an->an_leak_count = 0;
3994 /* Handle completed frames */
3995 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
3996 TAILQ_REMOVE(&bf_cq, bf, bf_list);
3997 ath_tx_default_comp(sc, bf, 0);
4002 * Drain all the software TXQs currently with traffic queued.
4005 ath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq)
4007 struct ath_tid *tid;
4015 * Iterate over all active tids for the given txq,
4016 * flushing and unsched'ing them
4018 while (! TAILQ_EMPTY(&txq->axq_tidq)) {
4019 tid = TAILQ_FIRST(&txq->axq_tidq);
4020 ath_tx_tid_drain(sc, tid->an, tid, &bf_cq);
4021 ath_tx_tid_unsched(sc, tid);
4026 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4027 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4028 ath_tx_default_comp(sc, bf, 0);
4033 * Handle completion of non-aggregate session frames.
4035 * This (currently) doesn't implement software retransmission of
4036 * non-aggregate frames!
4038 * Software retransmission of non-aggregate frames needs to obey
4039 * the strict sequence number ordering, and drop any frames that
4042 * For now, filtered frames and frame transmission will cause
4043 * all kinds of issues. So we don't support them.
4045 * So anyone queuing frames via ath_tx_normal_xmit() or
4046 * ath_tx_hw_queue_norm() must override and set CLRDMASK.
4049 ath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail)
4051 struct ieee80211_node *ni = bf->bf_node;
4052 struct ath_node *an = ATH_NODE(ni);
4053 int tid = bf->bf_state.bfs_tid;
4054 struct ath_tid *atid = &an->an_tid[tid];
4055 struct ath_tx_status *ts = &bf->bf_status.ds_txstat;
4057 /* The TID state is protected behind the TXQ lock */
4060 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n",
4061 __func__, bf, fail, atid->hwq_depth - 1);
4067 * If the frame was filtered, stick it on the filter frame
4068 * queue and complain about it. It shouldn't happen!
4070 if ((ts->ts_status & HAL_TXERR_FILT) ||
4071 (ts->ts_status != 0 && atid->isfiltered)) {
4072 DPRINTF(sc, ATH_DEBUG_SW_TX,
4073 "%s: isfiltered=%d, ts_status=%d: huh?\n",
4077 ath_tx_tid_filt_comp_buf(sc, atid, bf);
4080 if (atid->isfiltered)
4081 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: filtered?!\n", __func__);
4082 if (atid->hwq_depth < 0)
4083 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: hwq_depth < 0: %d\n",
4084 __func__, atid->hwq_depth);
4087 * If the queue is filtered, potentially mark it as complete
4088 * and reschedule it as needed.
4090 * This is required as there may be a subsequent TX descriptor
4091 * for this end-node that has CLRDMASK set, so it's quite possible
4092 * that a filtered frame will be followed by a non-filtered
4093 * (complete or otherwise) frame.
4095 * XXX should we do this before we complete the frame?
4097 if (atid->isfiltered)
4098 ath_tx_tid_filt_comp_complete(sc, atid);
4102 * punt to rate control if we're not being cleaned up
4103 * during a hw queue drain and the frame wanted an ACK.
4105 if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0))
4106 ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc,
4107 ts, bf->bf_state.bfs_pktlen,
4108 1, (ts->ts_status == 0) ? 0 : 1);
4110 ath_tx_default_comp(sc, bf, fail);
4114 * Handle cleanup of aggregate session packets that aren't
4117 * There's no need to update the BAW here - the session is being
4121 ath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf)
4123 struct ieee80211_node *ni = bf->bf_node;
4124 struct ath_node *an = ATH_NODE(ni);
4125 int tid = bf->bf_state.bfs_tid;
4126 struct ath_tid *atid = &an->an_tid[tid];
4128 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n",
4129 __func__, tid, atid->incomp);
4133 if (atid->incomp == 0) {
4134 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4135 "%s: TID %d: cleaned up! resume!\n",
4137 atid->cleanup_inprogress = 0;
4138 ath_tx_tid_resume(sc, atid);
4142 ath_tx_default_comp(sc, bf, 0);
4146 * Performs transmit side cleanup when TID changes from aggregated to
4149 * - Discard all retry frames from the s/w queue.
4150 * - Fix the tx completion function for all buffers in s/w queue.
4151 * - Count the number of unacked frames, and let transmit completion
4154 * The caller is responsible for pausing the TID and unpausing the
4155 * TID if no cleanup was required. Otherwise the cleanup path will
4156 * unpause the TID once the last hardware queued frame is completed.
4159 ath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid,
4162 struct ath_tid *atid = &an->an_tid[tid];
4163 struct ieee80211_tx_ampdu *tap;
4164 struct ath_buf *bf, *bf_next;
4166 ATH_TX_LOCK_ASSERT(sc);
4168 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4169 "%s: TID %d: called\n", __func__, tid);
4172 * Move the filtered frames to the TX queue, before
4173 * we run off and discard/process things.
4175 /* XXX this is really quite inefficient */
4176 while ((bf = ATH_TID_FILT_LAST(atid, ath_bufhead_s)) != NULL) {
4177 ATH_TID_FILT_REMOVE(atid, bf, bf_list);
4178 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4182 * Update the frames in the software TX queue:
4184 * + Discard retry frames in the queue
4185 * + Fix the completion function to be non-aggregate
4187 bf = ATH_TID_FIRST(atid);
4189 if (bf->bf_state.bfs_isretried) {
4190 bf_next = TAILQ_NEXT(bf, bf_list);
4191 ATH_TID_REMOVE(atid, bf, bf_list);
4192 if (bf->bf_state.bfs_dobaw) {
4193 ath_tx_update_baw(sc, an, atid, bf);
4194 if (!bf->bf_state.bfs_addedbaw)
4195 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4196 "%s: wasn't added: seqno %d\n",
4198 SEQNO(bf->bf_state.bfs_seqno));
4200 bf->bf_state.bfs_dobaw = 0;
4202 * Call the default completion handler with "fail" just
4203 * so upper levels are suitably notified about this.
4205 TAILQ_INSERT_TAIL(bf_cq, bf, bf_list);
4209 /* Give these the default completion handler */
4210 bf->bf_comp = ath_tx_normal_comp;
4211 bf = TAILQ_NEXT(bf, bf_list);
4215 * Calculate what hardware-queued frames exist based
4216 * on the current BAW size. Ie, what frames have been
4217 * added to the TX hardware queue for this TID but
4220 tap = ath_tx_get_tx_tid(an, tid);
4221 /* Need the lock - fiddling with BAW */
4222 while (atid->baw_head != atid->baw_tail) {
4223 if (atid->tx_buf[atid->baw_head]) {
4225 atid->cleanup_inprogress = 1;
4226 atid->tx_buf[atid->baw_head] = NULL;
4228 INCR(atid->baw_head, ATH_TID_MAX_BUFS);
4229 INCR(tap->txa_start, IEEE80211_SEQ_RANGE);
4232 if (atid->cleanup_inprogress)
4233 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4234 "%s: TID %d: cleanup needed: %d packets\n",
4235 __func__, tid, atid->incomp);
4237 /* Owner now must free completed frames */
4240 static struct ath_buf *
4241 ath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an,
4242 struct ath_tid *tid, struct ath_buf *bf)
4244 struct ath_buf *nbf;
4248 * Clone the buffer. This will handle the dma unmap and
4249 * copy the node reference to the new buffer. If this
4250 * works out, 'bf' will have no DMA mapping, no mbuf
4251 * pointer and no node reference.
4253 nbf = ath_buf_clone(sc, bf);
4256 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: ATH_BUF_BUSY; cloning\n",
4261 /* Failed to clone */
4262 DPRINTF(sc, ATH_DEBUG_XMIT,
4263 "%s: failed to clone a busy buffer\n",
4268 /* Setup the dma for the new buffer */
4269 error = ath_tx_dmasetup(sc, nbf, nbf->bf_m);
4271 DPRINTF(sc, ATH_DEBUG_XMIT,
4272 "%s: failed to setup dma for clone\n",
4275 * Put this at the head of the list, not tail;
4276 * that way it doesn't interfere with the
4277 * busy buffer logic (which uses the tail of
4281 ath_returnbuf_head(sc, nbf);
4282 ATH_TXBUF_UNLOCK(sc);
4286 /* Update BAW if required, before we free the original buf */
4287 if (bf->bf_state.bfs_dobaw)
4288 ath_tx_switch_baw_buf(sc, an, tid, bf, nbf);
4290 /* Free original buffer; return new buffer */
4291 ath_freebuf(sc, bf);
4297 * Handle retrying an unaggregate frame in an aggregate
4300 * If too many retries occur, pause the TID, wait for
4301 * any further retransmits (as there's no reason why
4302 * non-aggregate frames in an aggregate session are
4303 * transmitted in-order; they just have to be in-BAW)
4304 * and then queue a BAR.
4307 ath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf)
4309 struct ieee80211_node *ni = bf->bf_node;
4310 struct ath_node *an = ATH_NODE(ni);
4311 int tid = bf->bf_state.bfs_tid;
4312 struct ath_tid *atid = &an->an_tid[tid];
4313 struct ieee80211_tx_ampdu *tap;
4317 tap = ath_tx_get_tx_tid(an, tid);
4320 * If the buffer is marked as busy, we can't directly
4321 * reuse it. Instead, try to clone the buffer.
4322 * If the clone is successful, recycle the old buffer.
4323 * If the clone is unsuccessful, set bfs_retries to max
4324 * to force the next bit of code to free the buffer
4327 if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) &&
4328 (bf->bf_flags & ATH_BUF_BUSY)) {
4329 struct ath_buf *nbf;
4330 nbf = ath_tx_retry_clone(sc, an, atid, bf);
4332 /* bf has been freed at this point */
4335 bf->bf_state.bfs_retries = SWMAX_RETRIES + 1;
4338 if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) {
4339 DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES,
4340 "%s: exceeded retries; seqno %d\n",
4341 __func__, SEQNO(bf->bf_state.bfs_seqno));
4342 sc->sc_stats.ast_tx_swretrymax++;
4344 /* Update BAW anyway */
4345 if (bf->bf_state.bfs_dobaw) {
4346 ath_tx_update_baw(sc, an, atid, bf);
4347 if (! bf->bf_state.bfs_addedbaw)
4348 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4349 "%s: wasn't added: seqno %d\n",
4350 __func__, SEQNO(bf->bf_state.bfs_seqno));
4352 bf->bf_state.bfs_dobaw = 0;
4354 /* Suspend the TX queue and get ready to send the BAR */
4355 ath_tx_tid_bar_suspend(sc, atid);
4357 /* Send the BAR if there are no other frames waiting */
4358 if (ath_tx_tid_bar_tx_ready(sc, atid))
4359 ath_tx_tid_bar_tx(sc, atid);
4363 /* Free buffer, bf is free after this call */
4364 ath_tx_default_comp(sc, bf, 0);
4369 * This increments the retry counter as well as
4370 * sets the retry flag in the ath_buf and packet
4373 ath_tx_set_retry(sc, bf);
4374 sc->sc_stats.ast_tx_swretries++;
4377 * Insert this at the head of the queue, so it's
4378 * retried before any current/subsequent frames.
4380 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4381 ath_tx_tid_sched(sc, atid);
4382 /* Send the BAR if there are no other frames waiting */
4383 if (ath_tx_tid_bar_tx_ready(sc, atid))
4384 ath_tx_tid_bar_tx(sc, atid);
4390 * Common code for aggregate excessive retry/subframe retry.
4391 * If retrying, queues buffers to bf_q. If not, frees the
4394 * XXX should unify this with ath_tx_aggr_retry_unaggr()
4397 ath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf,
4400 struct ieee80211_node *ni = bf->bf_node;
4401 struct ath_node *an = ATH_NODE(ni);
4402 int tid = bf->bf_state.bfs_tid;
4403 struct ath_tid *atid = &an->an_tid[tid];
4405 ATH_TX_LOCK_ASSERT(sc);
4407 /* XXX clr11naggr should be done for all subframes */
4408 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
4409 ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0);
4411 /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */
4414 * If the buffer is marked as busy, we can't directly
4415 * reuse it. Instead, try to clone the buffer.
4416 * If the clone is successful, recycle the old buffer.
4417 * If the clone is unsuccessful, set bfs_retries to max
4418 * to force the next bit of code to free the buffer
4421 if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) &&
4422 (bf->bf_flags & ATH_BUF_BUSY)) {
4423 struct ath_buf *nbf;
4424 nbf = ath_tx_retry_clone(sc, an, atid, bf);
4426 /* bf has been freed at this point */
4429 bf->bf_state.bfs_retries = SWMAX_RETRIES + 1;
4432 if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) {
4433 sc->sc_stats.ast_tx_swretrymax++;
4434 DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES,
4435 "%s: max retries: seqno %d\n",
4436 __func__, SEQNO(bf->bf_state.bfs_seqno));
4437 ath_tx_update_baw(sc, an, atid, bf);
4438 if (!bf->bf_state.bfs_addedbaw)
4439 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4440 "%s: wasn't added: seqno %d\n",
4441 __func__, SEQNO(bf->bf_state.bfs_seqno));
4442 bf->bf_state.bfs_dobaw = 0;
4446 ath_tx_set_retry(sc, bf);
4447 sc->sc_stats.ast_tx_swretries++;
4448 bf->bf_next = NULL; /* Just to make sure */
4450 /* Clear the aggregate state */
4451 bf->bf_state.bfs_aggr = 0;
4452 bf->bf_state.bfs_ndelim = 0; /* ??? needed? */
4453 bf->bf_state.bfs_nframes = 1;
4455 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
4460 * error pkt completion for an aggregate destination
4463 ath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first,
4464 struct ath_tid *tid)
4466 struct ieee80211_node *ni = bf_first->bf_node;
4467 struct ath_node *an = ATH_NODE(ni);
4468 struct ath_buf *bf_next, *bf;
4471 struct ieee80211_tx_ampdu *tap;
4478 * Update rate control - all frames have failed.
4480 * XXX use the length in the first frame in the series;
4481 * XXX just so things are consistent for now.
4483 ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc,
4484 &bf_first->bf_status.ds_txstat,
4485 bf_first->bf_state.bfs_pktlen,
4486 bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes);
4489 tap = ath_tx_get_tx_tid(an, tid->tid);
4490 sc->sc_stats.ast_tx_aggr_failall++;
4492 /* Retry all subframes */
4495 bf_next = bf->bf_next;
4496 bf->bf_next = NULL; /* Remove it from the aggr list */
4497 sc->sc_stats.ast_tx_aggr_fail++;
4498 if (ath_tx_retry_subframe(sc, bf, &bf_q)) {
4501 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4506 /* Prepend all frames to the beginning of the queue */
4507 while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) {
4508 TAILQ_REMOVE(&bf_q, bf, bf_list);
4509 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
4513 * Schedule the TID to be re-tried.
4515 ath_tx_tid_sched(sc, tid);
4518 * send bar if we dropped any frames
4520 * Keep the txq lock held for now, as we need to ensure
4521 * that ni_txseqs[] is consistent (as it's being updated
4522 * in the ifnet TX context or raw TX context.)
4525 /* Suspend the TX queue and get ready to send the BAR */
4526 ath_tx_tid_bar_suspend(sc, tid);
4530 * Send BAR if required
4532 if (ath_tx_tid_bar_tx_ready(sc, tid))
4533 ath_tx_tid_bar_tx(sc, tid);
4537 /* Complete frames which errored out */
4538 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4539 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4540 ath_tx_default_comp(sc, bf, 0);
4545 * Handle clean-up of packets from an aggregate list.
4547 * There's no need to update the BAW here - the session is being
4551 ath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first)
4553 struct ath_buf *bf, *bf_next;
4554 struct ieee80211_node *ni = bf_first->bf_node;
4555 struct ath_node *an = ATH_NODE(ni);
4556 int tid = bf_first->bf_state.bfs_tid;
4557 struct ath_tid *atid = &an->an_tid[tid];
4568 if (atid->incomp == 0) {
4569 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4570 "%s: TID %d: cleaned up! resume!\n",
4572 atid->cleanup_inprogress = 0;
4573 ath_tx_tid_resume(sc, atid);
4576 /* Send BAR if required */
4577 /* XXX why would we send a BAR when transitioning to non-aggregation? */
4579 * XXX TODO: we should likely just tear down the BAR state here,
4580 * rather than sending a BAR.
4582 if (ath_tx_tid_bar_tx_ready(sc, atid))
4583 ath_tx_tid_bar_tx(sc, atid);
4587 /* Handle frame completion */
4590 bf_next = bf->bf_next;
4591 ath_tx_default_comp(sc, bf, 1);
4597 * Handle completion of an set of aggregate frames.
4599 * Note: the completion handler is the last descriptor in the aggregate,
4600 * not the last descriptor in the first frame.
4603 ath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first,
4606 //struct ath_desc *ds = bf->bf_lastds;
4607 struct ieee80211_node *ni = bf_first->bf_node;
4608 struct ath_node *an = ATH_NODE(ni);
4609 int tid = bf_first->bf_state.bfs_tid;
4610 struct ath_tid *atid = &an->an_tid[tid];
4611 struct ath_tx_status ts;
4612 struct ieee80211_tx_ampdu *tap;
4618 struct ath_buf *bf, *bf_next;
4621 int nframes = 0, nbad = 0, nf;
4623 /* XXX there's too much on the stack? */
4624 struct ath_rc_series rc[ATH_RC_NUM];
4627 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n",
4628 __func__, atid->hwq_depth);
4631 * Take a copy; this may be needed -after- bf_first
4632 * has been completed and freed.
4634 ts = bf_first->bf_status.ds_txstat;
4639 /* The TID state is kept behind the TXQ lock */
4643 if (atid->hwq_depth < 0)
4644 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: hwq_depth < 0: %d\n",
4645 __func__, atid->hwq_depth);
4648 * If the TID is filtered, handle completing the filter
4649 * transition before potentially kicking it to the cleanup
4652 * XXX this is duplicate work, ew.
4654 if (atid->isfiltered)
4655 ath_tx_tid_filt_comp_complete(sc, atid);
4658 * Punt cleanup to the relevant function, not our problem now
4660 if (atid->cleanup_inprogress) {
4661 if (atid->isfiltered)
4662 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4663 "%s: isfiltered=1, normal_comp?\n",
4666 ath_tx_comp_cleanup_aggr(sc, bf_first);
4671 * If the frame is filtered, transition to filtered frame
4672 * mode and add this to the filtered frame list.
4674 * XXX TODO: figure out how this interoperates with
4675 * BAR, pause and cleanup states.
4677 if ((ts.ts_status & HAL_TXERR_FILT) ||
4678 (ts.ts_status != 0 && atid->isfiltered)) {
4680 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4681 "%s: isfiltered=1, fail=%d\n", __func__, fail);
4682 ath_tx_tid_filt_comp_aggr(sc, atid, bf_first, &bf_cq);
4684 /* Remove from BAW */
4685 TAILQ_FOREACH_SAFE(bf, &bf_cq, bf_list, bf_next) {
4686 if (bf->bf_state.bfs_addedbaw)
4688 if (bf->bf_state.bfs_dobaw) {
4689 ath_tx_update_baw(sc, an, atid, bf);
4690 if (!bf->bf_state.bfs_addedbaw)
4691 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4692 "%s: wasn't added: seqno %d\n",
4694 SEQNO(bf->bf_state.bfs_seqno));
4696 bf->bf_state.bfs_dobaw = 0;
4699 * If any intermediate frames in the BAW were dropped when
4700 * handling filtering things, send a BAR.
4703 ath_tx_tid_bar_suspend(sc, atid);
4706 * Finish up by sending a BAR if required and freeing
4707 * the frames outside of the TX lock.
4709 goto finish_send_bar;
4713 * XXX for now, use the first frame in the aggregate for
4714 * XXX rate control completion; it's at least consistent.
4716 pktlen = bf_first->bf_state.bfs_pktlen;
4719 * Handle errors first!
4721 * Here, handle _any_ error as a "exceeded retries" error.
4722 * Later on (when filtered frames are to be specially handled)
4723 * it'll have to be expanded.
4726 if (ts.ts_status & HAL_TXERR_XRETRY) {
4728 if (ts.ts_status != 0) {
4730 ath_tx_comp_aggr_error(sc, bf_first, atid);
4734 tap = ath_tx_get_tx_tid(an, tid);
4737 * extract starting sequence and block-ack bitmap
4739 /* XXX endian-ness of seq_st, ba? */
4740 seq_st = ts.ts_seqnum;
4741 hasba = !! (ts.ts_flags & HAL_TX_BA);
4742 tx_ok = (ts.ts_status == 0);
4743 isaggr = bf_first->bf_state.bfs_aggr;
4744 ba[0] = ts.ts_ba_low;
4745 ba[1] = ts.ts_ba_high;
4748 * Copy the TX completion status and the rate control
4749 * series from the first descriptor, as it may be freed
4750 * before the rate control code can get its grubby fingers
4753 memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc));
4755 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4756 "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, "
4757 "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n",
4758 __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags,
4759 isaggr, seq_st, hasba, ba[0], ba[1]);
4762 * The reference driver doesn't do this; it simply ignores
4763 * this check in its entirety.
4765 * I've seen this occur when using iperf to send traffic
4766 * out tid 1 - the aggregate frames are all marked as TID 1,
4767 * but the TXSTATUS has TID=0. So, let's just ignore this
4771 /* Occasionally, the MAC sends a tx status for the wrong TID. */
4772 if (tid != ts.ts_tid) {
4773 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: tid %d != hw tid %d\n",
4774 __func__, tid, ts.ts_tid);
4779 /* AR5416 BA bug; this requires an interface reset */
4780 if (isaggr && tx_ok && (! hasba)) {
4781 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4782 "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, "
4784 __func__, hasba, tx_ok, isaggr, seq_st);
4785 /* XXX TODO: schedule an interface reset */
4787 ath_printtxbuf(sc, bf_first,
4788 sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0);
4793 * Walk the list of frames, figure out which ones were correctly
4794 * sent and which weren't.
4797 nf = bf_first->bf_state.bfs_nframes;
4799 /* bf_first is going to be invalid once this list is walked */
4803 * Walk the list of completed frames and determine
4804 * which need to be completed and which need to be
4807 * For completed frames, the completion functions need
4808 * to be called at the end of this function as the last
4809 * node reference may free the node.
4811 * Finally, since the TXQ lock can't be held during the
4812 * completion callback (to avoid lock recursion),
4813 * the completion calls have to be done outside of the
4818 ba_index = ATH_BA_INDEX(seq_st,
4819 SEQNO(bf->bf_state.bfs_seqno));
4820 bf_next = bf->bf_next;
4821 bf->bf_next = NULL; /* Remove it from the aggr list */
4823 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4824 "%s: checking bf=%p seqno=%d; ack=%d\n",
4825 __func__, bf, SEQNO(bf->bf_state.bfs_seqno),
4826 ATH_BA_ISSET(ba, ba_index));
4828 if (tx_ok && ATH_BA_ISSET(ba, ba_index)) {
4829 sc->sc_stats.ast_tx_aggr_ok++;
4830 ath_tx_update_baw(sc, an, atid, bf);
4831 bf->bf_state.bfs_dobaw = 0;
4832 if (!bf->bf_state.bfs_addedbaw)
4833 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4834 "%s: wasn't added: seqno %d\n",
4835 __func__, SEQNO(bf->bf_state.bfs_seqno));
4837 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4839 sc->sc_stats.ast_tx_aggr_fail++;
4840 if (ath_tx_retry_subframe(sc, bf, &bf_q)) {
4843 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4851 * Now that the BAW updates have been done, unlock
4853 * txseq is grabbed before the lock is released so we
4854 * have a consistent view of what -was- in the BAW.
4855 * Anything after this point will not yet have been
4858 txseq = tap->txa_start;
4862 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4863 "%s: num frames seen=%d; bf nframes=%d\n",
4864 __func__, nframes, nf);
4867 * Now we know how many frames were bad, call the rate
4871 ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes,
4875 * send bar if we dropped any frames
4878 /* Suspend the TX queue and get ready to send the BAR */
4880 ath_tx_tid_bar_suspend(sc, atid);
4884 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4885 "%s: txa_start now %d\n", __func__, tap->txa_start);
4889 /* Prepend all frames to the beginning of the queue */
4890 while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) {
4891 TAILQ_REMOVE(&bf_q, bf, bf_list);
4892 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4896 * Reschedule to grab some further frames.
4898 ath_tx_tid_sched(sc, atid);
4901 * If the queue is filtered, re-schedule as required.
4903 * This is required as there may be a subsequent TX descriptor
4904 * for this end-node that has CLRDMASK set, so it's quite possible
4905 * that a filtered frame will be followed by a non-filtered
4906 * (complete or otherwise) frame.
4908 * XXX should we do this before we complete the frame?
4910 if (atid->isfiltered)
4911 ath_tx_tid_filt_comp_complete(sc, atid);
4916 * Send BAR if required
4918 if (ath_tx_tid_bar_tx_ready(sc, atid))
4919 ath_tx_tid_bar_tx(sc, atid);
4923 /* Do deferred completion */
4924 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4925 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4926 ath_tx_default_comp(sc, bf, 0);
4931 * Handle completion of unaggregated frames in an ADDBA
4934 * Fail is set to 1 if the entry is being freed via a call to
4935 * ath_tx_draintxq().
4938 ath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail)
4940 struct ieee80211_node *ni = bf->bf_node;
4941 struct ath_node *an = ATH_NODE(ni);
4942 int tid = bf->bf_state.bfs_tid;
4943 struct ath_tid *atid = &an->an_tid[tid];
4944 struct ath_tx_status ts;
4948 * Take a copy of this; filtering/cloning the frame may free the
4951 ts = bf->bf_status.ds_txstat;
4954 * Update rate control status here, before we possibly
4955 * punt to retry or cleanup.
4957 * Do it outside of the TXQ lock.
4959 if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0))
4960 ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc,
4961 &bf->bf_status.ds_txstat,
4962 bf->bf_state.bfs_pktlen,
4963 1, (ts.ts_status == 0) ? 0 : 1);
4966 * This is called early so atid->hwq_depth can be tracked.
4967 * This unfortunately means that it's released and regrabbed
4968 * during retry and cleanup. That's rather inefficient.
4972 if (tid == IEEE80211_NONQOS_TID)
4973 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=16!\n", __func__);
4975 DPRINTF(sc, ATH_DEBUG_SW_TX,
4976 "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n",
4977 __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth,
4978 SEQNO(bf->bf_state.bfs_seqno));
4981 if (atid->hwq_depth < 0)
4982 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: hwq_depth < 0: %d\n",
4983 __func__, atid->hwq_depth);
4986 * If the TID is filtered, handle completing the filter
4987 * transition before potentially kicking it to the cleanup
4990 if (atid->isfiltered)
4991 ath_tx_tid_filt_comp_complete(sc, atid);
4994 * If a cleanup is in progress, punt to comp_cleanup;
4995 * rather than handling it here. It's thus their
4996 * responsibility to clean up, call the completion
4997 * function in net80211, etc.
4999 if (atid->cleanup_inprogress) {
5000 if (atid->isfiltered)
5001 DPRINTF(sc, ATH_DEBUG_SW_TX,
5002 "%s: isfiltered=1, normal_comp?\n",
5005 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n",
5007 ath_tx_comp_cleanup_unaggr(sc, bf);
5012 * XXX TODO: how does cleanup, BAR and filtered frame handling
5015 * If the frame is filtered OR if it's any failure but
5016 * the TID is filtered, the frame must be added to the
5017 * filtered frame list.
5019 * However - a busy buffer can't be added to the filtered
5020 * list as it will end up being recycled without having
5021 * been made available for the hardware.
5023 if ((ts.ts_status & HAL_TXERR_FILT) ||
5024 (ts.ts_status != 0 && atid->isfiltered)) {
5028 DPRINTF(sc, ATH_DEBUG_SW_TX,
5029 "%s: isfiltered=1, fail=%d\n",
5031 freeframe = ath_tx_tid_filt_comp_single(sc, atid, bf);
5033 /* Remove from BAW */
5034 if (bf->bf_state.bfs_addedbaw)
5036 if (bf->bf_state.bfs_dobaw) {
5037 ath_tx_update_baw(sc, an, atid, bf);
5038 if (!bf->bf_state.bfs_addedbaw)
5039 DPRINTF(sc, ATH_DEBUG_SW_TX,
5040 "%s: wasn't added: seqno %d\n",
5041 __func__, SEQNO(bf->bf_state.bfs_seqno));
5043 bf->bf_state.bfs_dobaw = 0;
5047 * If the frame couldn't be filtered, treat it as a drop and
5048 * prepare to send a BAR.
5050 if (freeframe && drops)
5051 ath_tx_tid_bar_suspend(sc, atid);
5054 * Send BAR if required
5056 if (ath_tx_tid_bar_tx_ready(sc, atid))
5057 ath_tx_tid_bar_tx(sc, atid);
5061 * If freeframe is set, then the frame couldn't be
5062 * cloned and bf is still valid. Just complete/free it.
5065 ath_tx_default_comp(sc, bf, fail);
5071 * Don't bother with the retry check if all frames
5072 * are being failed (eg during queue deletion.)
5075 if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) {
5077 if (fail == 0 && ts.ts_status != 0) {
5079 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n",
5081 ath_tx_aggr_retry_unaggr(sc, bf);
5085 /* Success? Complete */
5086 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n",
5087 __func__, tid, SEQNO(bf->bf_state.bfs_seqno));
5088 if (bf->bf_state.bfs_dobaw) {
5089 ath_tx_update_baw(sc, an, atid, bf);
5090 bf->bf_state.bfs_dobaw = 0;
5091 if (!bf->bf_state.bfs_addedbaw)
5092 DPRINTF(sc, ATH_DEBUG_SW_TX,
5093 "%s: wasn't added: seqno %d\n",
5094 __func__, SEQNO(bf->bf_state.bfs_seqno));
5098 * If the queue is filtered, re-schedule as required.
5100 * This is required as there may be a subsequent TX descriptor
5101 * for this end-node that has CLRDMASK set, so it's quite possible
5102 * that a filtered frame will be followed by a non-filtered
5103 * (complete or otherwise) frame.
5105 * XXX should we do this before we complete the frame?
5107 if (atid->isfiltered)
5108 ath_tx_tid_filt_comp_complete(sc, atid);
5111 * Send BAR if required
5113 if (ath_tx_tid_bar_tx_ready(sc, atid))
5114 ath_tx_tid_bar_tx(sc, atid);
5118 ath_tx_default_comp(sc, bf, fail);
5119 /* bf is freed at this point */
5123 ath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail)
5125 if (bf->bf_state.bfs_aggr)
5126 ath_tx_aggr_comp_aggr(sc, bf, fail);
5128 ath_tx_aggr_comp_unaggr(sc, bf, fail);
5132 * Schedule some packets from the given node/TID to the hardware.
5134 * This is the aggregate version.
5137 ath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an,
5138 struct ath_tid *tid)
5141 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
5142 struct ieee80211_tx_ampdu *tap;
5143 ATH_AGGR_STATUS status;
5146 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid);
5147 ATH_TX_LOCK_ASSERT(sc);
5150 * XXX TODO: If we're called for a queue that we're leaking frames to,
5151 * ensure we only leak one.
5154 tap = ath_tx_get_tx_tid(an, tid->tid);
5156 if (tid->tid == IEEE80211_NONQOS_TID)
5157 DPRINTF(sc, ATH_DEBUG_SW_TX,
5158 "%s: called for TID=NONQOS_TID?\n", __func__);
5161 status = ATH_AGGR_DONE;
5164 * If the upper layer has paused the TID, don't
5165 * queue any further packets.
5167 * This can also occur from the completion task because
5168 * of packet loss; but as its serialised with this code,
5169 * it won't "appear" half way through queuing packets.
5171 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
5174 bf = ATH_TID_FIRST(tid);
5180 * If the packet doesn't fall within the BAW (eg a NULL
5181 * data frame), schedule it directly; continue.
5183 if (! bf->bf_state.bfs_dobaw) {
5184 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5185 "%s: non-baw packet\n",
5187 ATH_TID_REMOVE(tid, bf, bf_list);
5189 if (bf->bf_state.bfs_nframes > 1)
5190 DPRINTF(sc, ATH_DEBUG_SW_TX,
5191 "%s: aggr=%d, nframes=%d\n",
5193 bf->bf_state.bfs_aggr,
5194 bf->bf_state.bfs_nframes);
5197 * This shouldn't happen - such frames shouldn't
5198 * ever have been queued as an aggregate in the
5199 * first place. However, make sure the fields
5200 * are correctly setup just to be totally sure.
5202 bf->bf_state.bfs_aggr = 0;
5203 bf->bf_state.bfs_nframes = 1;
5205 /* Update CLRDMASK just before this frame is queued */
5206 ath_tx_update_clrdmask(sc, tid, bf);
5208 ath_tx_do_ratelookup(sc, bf);
5209 ath_tx_calc_duration(sc, bf);
5210 ath_tx_calc_protection(sc, bf);
5211 ath_tx_set_rtscts(sc, bf);
5212 ath_tx_rate_fill_rcflags(sc, bf);
5213 ath_tx_setds(sc, bf);
5214 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
5216 sc->sc_aggr_stats.aggr_nonbaw_pkt++;
5218 /* Queue the packet; continue */
5225 * Do a rate control lookup on the first frame in the
5226 * list. The rate control code needs that to occur
5227 * before it can determine whether to TX.
5228 * It's inaccurate because the rate control code doesn't
5229 * really "do" aggregate lookups, so it only considers
5230 * the size of the first frame.
5232 ath_tx_do_ratelookup(sc, bf);
5233 bf->bf_state.bfs_rc[3].rix = 0;
5234 bf->bf_state.bfs_rc[3].tries = 0;
5236 ath_tx_calc_duration(sc, bf);
5237 ath_tx_calc_protection(sc, bf);
5239 ath_tx_set_rtscts(sc, bf);
5240 ath_tx_rate_fill_rcflags(sc, bf);
5242 status = ath_tx_form_aggr(sc, an, tid, &bf_q);
5244 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5245 "%s: ath_tx_form_aggr() status=%d\n", __func__, status);
5248 * No frames to be picked up - out of BAW
5250 if (TAILQ_EMPTY(&bf_q))
5254 * This assumes that the descriptor list in the ath_bufhead
5255 * are already linked together via bf_next pointers.
5257 bf = TAILQ_FIRST(&bf_q);
5259 if (status == ATH_AGGR_8K_LIMITED)
5260 sc->sc_aggr_stats.aggr_rts_aggr_limited++;
5263 * If it's the only frame send as non-aggregate
5264 * assume that ath_tx_form_aggr() has checked
5265 * whether it's in the BAW and added it appropriately.
5267 if (bf->bf_state.bfs_nframes == 1) {
5268 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5269 "%s: single-frame aggregate\n", __func__);
5271 /* Update CLRDMASK just before this frame is queued */
5272 ath_tx_update_clrdmask(sc, tid, bf);
5274 bf->bf_state.bfs_aggr = 0;
5275 bf->bf_state.bfs_ndelim = 0;
5276 ath_tx_setds(sc, bf);
5277 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
5278 if (status == ATH_AGGR_BAW_CLOSED)
5279 sc->sc_aggr_stats.aggr_baw_closed_single_pkt++;
5281 sc->sc_aggr_stats.aggr_single_pkt++;
5283 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5284 "%s: multi-frame aggregate: %d frames, "
5286 __func__, bf->bf_state.bfs_nframes,
5287 bf->bf_state.bfs_al);
5288 bf->bf_state.bfs_aggr = 1;
5289 sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++;
5290 sc->sc_aggr_stats.aggr_aggr_pkt++;
5292 /* Update CLRDMASK just before this frame is queued */
5293 ath_tx_update_clrdmask(sc, tid, bf);
5296 * Calculate the duration/protection as required.
5298 ath_tx_calc_duration(sc, bf);
5299 ath_tx_calc_protection(sc, bf);
5302 * Update the rate and rtscts information based on the
5303 * rate decision made by the rate control code;
5304 * the first frame in the aggregate needs it.
5306 ath_tx_set_rtscts(sc, bf);
5309 * Setup the relevant descriptor fields
5310 * for aggregation. The first descriptor
5311 * already points to the rest in the chain.
5313 ath_tx_setds_11n(sc, bf);
5317 /* Set completion handler, multi-frame aggregate or not */
5318 bf->bf_comp = ath_tx_aggr_comp;
5320 if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID)
5321 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=16?\n", __func__);
5324 * Update leak count and frame config if were leaking frames.
5326 * XXX TODO: it should update all frames in an aggregate
5329 ath_tx_leak_count_update(sc, tid, bf);
5332 ath_tx_handoff(sc, txq, bf);
5334 /* Track outstanding buffer count to hardware */
5335 /* aggregates are "one" buffer */
5339 * Break out if ath_tx_form_aggr() indicated
5340 * there can't be any further progress (eg BAW is full.)
5341 * Checking for an empty txq is done above.
5343 * XXX locking on txq here?
5345 /* XXX TXQ locking */
5346 if (txq->axq_aggr_depth >= sc->sc_hwq_limit_aggr ||
5347 (status == ATH_AGGR_BAW_CLOSED ||
5348 status == ATH_AGGR_LEAK_CLOSED))
5354 * Schedule some packets from the given node/TID to the hardware.
5356 * XXX TODO: this routine doesn't enforce the maximum TXQ depth.
5357 * It just dumps frames into the TXQ. We should limit how deep
5358 * the transmit queue can grow for frames dispatched to the given
5361 * To avoid locking issues, either we need to own the TXQ lock
5362 * at this point, or we need to pass in the maximum frame count
5366 ath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an,
5367 struct ath_tid *tid)
5370 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
5372 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n",
5373 __func__, an, tid->tid);
5375 ATH_TX_LOCK_ASSERT(sc);
5377 /* Check - is AMPDU pending or running? then print out something */
5378 if (ath_tx_ampdu_pending(sc, an, tid->tid))
5379 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ampdu pending?\n",
5380 __func__, tid->tid);
5381 if (ath_tx_ampdu_running(sc, an, tid->tid))
5382 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ampdu running?\n",
5383 __func__, tid->tid);
5388 * If the upper layers have paused the TID, don't
5389 * queue any further packets.
5391 * XXX if we are leaking frames, make sure we decrement
5392 * that counter _and_ we continue here.
5394 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
5397 bf = ATH_TID_FIRST(tid);
5402 ATH_TID_REMOVE(tid, bf, bf_list);
5405 if (tid->tid != bf->bf_state.bfs_tid) {
5406 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bfs_tid %d !="
5407 " tid %d\n", __func__, bf->bf_state.bfs_tid,
5410 /* Normal completion handler */
5411 bf->bf_comp = ath_tx_normal_comp;
5414 * Override this for now, until the non-aggregate
5415 * completion handler correctly handles software retransmits.
5417 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
5419 /* Update CLRDMASK just before this frame is queued */
5420 ath_tx_update_clrdmask(sc, tid, bf);
5422 /* Program descriptors + rate control */
5423 ath_tx_do_ratelookup(sc, bf);
5424 ath_tx_calc_duration(sc, bf);
5425 ath_tx_calc_protection(sc, bf);
5426 ath_tx_set_rtscts(sc, bf);
5427 ath_tx_rate_fill_rcflags(sc, bf);
5428 ath_tx_setds(sc, bf);
5431 * Update the current leak count if
5432 * we're leaking frames; and set the
5433 * MORE flag as appropriate.
5435 ath_tx_leak_count_update(sc, tid, bf);
5437 /* Track outstanding buffer count to hardware */
5438 /* aggregates are "one" buffer */
5441 /* Punt to hardware or software txq */
5442 ath_tx_handoff(sc, txq, bf);
5447 * Schedule some packets to the given hardware queue.
5449 * This function walks the list of TIDs (ie, ath_node TIDs
5450 * with queued traffic) and attempts to schedule traffic
5453 * TID scheduling is implemented as a FIFO, with TIDs being
5454 * added to the end of the queue after some frames have been
5458 ath_txq_sched(struct ath_softc *sc, struct ath_txq *txq)
5460 struct ath_tid *tid, *next, *last;
5462 ATH_TX_LOCK_ASSERT(sc);
5465 * Don't schedule if the hardware queue is busy.
5466 * This (hopefully) gives some more time to aggregate
5467 * some packets in the aggregation queue.
5469 * XXX It doesn't stop a parallel sender from sneaking
5470 * in transmitting a frame!
5472 /* XXX TXQ locking */
5473 if (txq->axq_aggr_depth + txq->fifo.axq_depth >= sc->sc_hwq_limit_aggr) {
5474 sc->sc_aggr_stats.aggr_sched_nopkt++;
5477 if (txq->axq_depth >= sc->sc_hwq_limit_nonaggr) {
5478 sc->sc_aggr_stats.aggr_sched_nopkt++;
5482 last = TAILQ_LAST(&txq->axq_tidq, axq_t_s);
5484 TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) {
5486 * Suspend paused queues here; they'll be resumed
5487 * once the addba completes or times out.
5489 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n",
5490 __func__, tid->tid, tid->paused);
5491 ath_tx_tid_unsched(sc, tid);
5493 * This node may be in power-save and we're leaking
5494 * a frame; be careful.
5496 if (! ath_tx_tid_can_tx_or_sched(sc, tid)) {
5499 if (ath_tx_ampdu_running(sc, tid->an, tid->tid))
5500 ath_tx_tid_hw_queue_aggr(sc, tid->an, tid);
5502 ath_tx_tid_hw_queue_norm(sc, tid->an, tid);
5504 /* Not empty? Re-schedule */
5505 if (tid->axq_depth != 0)
5506 ath_tx_tid_sched(sc, tid);
5509 * Give the software queue time to aggregate more
5510 * packets. If we aren't running aggregation then
5511 * we should still limit the hardware queue depth.
5513 /* XXX TXQ locking */
5514 if (txq->axq_aggr_depth + txq->fifo.axq_depth >= sc->sc_hwq_limit_aggr) {
5517 if (txq->axq_depth >= sc->sc_hwq_limit_nonaggr) {
5522 * If this was the last entry on the original list, stop.
5523 * Otherwise nodes that have been rescheduled onto the end
5524 * of the TID FIFO list will just keep being rescheduled.
5526 * XXX What should we do about nodes that were paused
5527 * but are pending a leaking frame in response to a ps-poll?
5528 * They'll be put at the front of the list; so they'll
5529 * prematurely trigger this condition! Ew.
5541 * Return net80211 TID struct pointer, or NULL for none
5543 struct ieee80211_tx_ampdu *
5544 ath_tx_get_tx_tid(struct ath_node *an, int tid)
5546 struct ieee80211_node *ni = &an->an_node;
5547 struct ieee80211_tx_ampdu *tap;
5549 if (tid == IEEE80211_NONQOS_TID)
5552 tap = &ni->ni_tx_ampdu[tid];
5557 * Is AMPDU-TX running?
5560 ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid)
5562 struct ieee80211_tx_ampdu *tap;
5564 if (tid == IEEE80211_NONQOS_TID)
5567 tap = ath_tx_get_tx_tid(an, tid);
5569 return 0; /* Not valid; default to not running */
5571 return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING);
5575 * Is AMPDU-TX negotiation pending?
5578 ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid)
5580 struct ieee80211_tx_ampdu *tap;
5582 if (tid == IEEE80211_NONQOS_TID)
5585 tap = ath_tx_get_tx_tid(an, tid);
5587 return 0; /* Not valid; default to not pending */
5589 return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND);
5593 * Is AMPDU-TX pending for the given TID?
5598 * Method to handle sending an ADDBA request.
5600 * We tap this so the relevant flags can be set to pause the TID
5601 * whilst waiting for the response.
5603 * XXX there's no timeout handler we can override?
5606 ath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5607 int dialogtoken, int baparamset, int batimeout)
5609 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5610 int tid = tap->txa_tid;
5611 struct ath_node *an = ATH_NODE(ni);
5612 struct ath_tid *atid = &an->an_tid[tid];
5615 * XXX danger Will Robinson!
5617 * Although the taskqueue may be running and scheduling some more
5618 * packets, these should all be _before_ the addba sequence number.
5619 * However, net80211 will keep self-assigning sequence numbers
5620 * until addba has been negotiated.
5622 * In the past, these packets would be "paused" (which still works
5623 * fine, as they're being scheduled to the driver in the same
5624 * serialised method which is calling the addba request routine)
5625 * and when the aggregation session begins, they'll be dequeued
5626 * as aggregate packets and added to the BAW. However, now there's
5627 * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these
5628 * packets. Thus they never get included in the BAW tracking and
5629 * this can cause the initial burst of packets after the addba
5630 * negotiation to "hang", as they quickly fall outside the BAW.
5632 * The "eventual" solution should be to tag these packets with
5633 * dobaw. Although net80211 has given us a sequence number,
5634 * it'll be "after" the left edge of the BAW and thus it'll
5639 * This is a bit annoying. Until net80211 HT code inherits some
5640 * (any) locking, we may have this called in parallel BUT only
5641 * one response/timeout will be called. Grr.
5643 if (atid->addba_tx_pending == 0) {
5644 ath_tx_tid_pause(sc, atid);
5645 atid->addba_tx_pending = 1;
5649 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5650 "%s: %6D: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n",
5654 dialogtoken, baparamset, batimeout);
5655 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5656 "%s: txa_start=%d, ni_txseqs=%d\n",
5657 __func__, tap->txa_start, ni->ni_txseqs[tid]);
5659 return sc->sc_addba_request(ni, tap, dialogtoken, baparamset,
5664 * Handle an ADDBA response.
5666 * We unpause the queue so TX'ing can resume.
5668 * Any packets TX'ed from this point should be "aggregate" (whether
5669 * aggregate or not) so the BAW is updated.
5671 * Note! net80211 keeps self-assigning sequence numbers until
5672 * ampdu is negotiated. This means the initially-negotiated BAW left
5673 * edge won't match the ni->ni_txseq.
5675 * So, being very dirty, the BAW left edge is "slid" here to match
5678 * What likely SHOULD happen is that all packets subsequent to the
5679 * addba request should be tagged as aggregate and queued as non-aggregate
5680 * frames; thus updating the BAW. For now though, I'll just slide the
5684 ath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5685 int status, int code, int batimeout)
5687 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5688 int tid = tap->txa_tid;
5689 struct ath_node *an = ATH_NODE(ni);
5690 struct ath_tid *atid = &an->an_tid[tid];
5693 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5694 "%s: %6D: called; status=%d, code=%d, batimeout=%d\n", __func__,
5697 status, code, batimeout);
5699 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5700 "%s: txa_start=%d, ni_txseqs=%d\n",
5701 __func__, tap->txa_start, ni->ni_txseqs[tid]);
5704 * Call this first, so the interface flags get updated
5705 * before the TID is unpaused. Otherwise a race condition
5706 * exists where the unpaused TID still doesn't yet have
5707 * IEEE80211_AGGR_RUNNING set.
5709 r = sc->sc_addba_response(ni, tap, status, code, batimeout);
5712 atid->addba_tx_pending = 0;
5715 * Slide the BAW left edge to wherever net80211 left it for us.
5716 * Read above for more information.
5718 tap->txa_start = ni->ni_txseqs[tid];
5719 ath_tx_tid_resume(sc, atid);
5726 * Stop ADDBA on a queue.
5728 * This can be called whilst BAR TX is currently active on the queue,
5729 * so make sure this is unblocked before continuing.
5732 ath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
5734 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5735 int tid = tap->txa_tid;
5736 struct ath_node *an = ATH_NODE(ni);
5737 struct ath_tid *atid = &an->an_tid[tid];
5741 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: %6D: called\n",
5747 * Pause TID traffic early, so there aren't any races
5748 * Unblock the pending BAR held traffic, if it's currently paused.
5751 ath_tx_tid_pause(sc, atid);
5752 if (atid->bar_wait) {
5754 * bar_unsuspend() expects bar_tx == 1, as it should be
5755 * called from the TX completion path. This quietens
5756 * the warning. It's cleared for us anyway.
5759 ath_tx_tid_bar_unsuspend(sc, atid);
5763 /* There's no need to hold the TXQ lock here */
5764 sc->sc_addba_stop(ni, tap);
5767 * ath_tx_tid_cleanup will resume the TID if possible, otherwise
5768 * it'll set the cleanup flag, and it'll be unpaused once
5769 * things have been cleaned up.
5773 ath_tx_tid_cleanup(sc, an, tid, &bf_cq);
5775 * Unpause the TID if no cleanup is required.
5777 if (! atid->cleanup_inprogress)
5778 ath_tx_tid_resume(sc, atid);
5781 /* Handle completing frames and fail them */
5782 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
5783 TAILQ_REMOVE(&bf_cq, bf, bf_list);
5784 ath_tx_default_comp(sc, bf, 1);
5790 * Handle a node reassociation.
5792 * We may have a bunch of frames queued to the hardware; those need
5793 * to be marked as cleanup.
5796 ath_tx_node_reassoc(struct ath_softc *sc, struct ath_node *an)
5798 struct ath_tid *tid;
5805 ATH_TX_UNLOCK_ASSERT(sc);
5808 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
5809 tid = &an->an_tid[i];
5810 if (tid->hwq_depth == 0)
5812 ath_tx_tid_pause(sc, tid);
5813 DPRINTF(sc, ATH_DEBUG_NODE,
5814 "%s: %6D: TID %d: cleaning up TID\n",
5816 an->an_node.ni_macaddr,
5819 ath_tx_tid_cleanup(sc, an, i, &bf_cq);
5821 * Unpause the TID if no cleanup is required.
5823 if (! tid->cleanup_inprogress)
5824 ath_tx_tid_resume(sc, tid);
5828 /* Handle completing frames and fail them */
5829 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
5830 TAILQ_REMOVE(&bf_cq, bf, bf_list);
5831 ath_tx_default_comp(sc, bf, 1);
5836 * Note: net80211 bar_timeout() doesn't call this function on BAR failure;
5837 * it simply tears down the aggregation session. Ew.
5839 * It however will call ieee80211_ampdu_stop() which will call
5840 * ic->ic_addba_stop().
5842 * XXX This uses a hard-coded max BAR count value; the whole
5843 * XXX BAR TX success or failure should be better handled!
5846 ath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5849 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5850 int tid = tap->txa_tid;
5851 struct ath_node *an = ATH_NODE(ni);
5852 struct ath_tid *atid = &an->an_tid[tid];
5853 int attempts = tap->txa_attempts;
5855 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
5856 "%s: %6D: called; txa_tid=%d, atid->tid=%d, status=%d, attempts=%d\n",
5865 /* Note: This may update the BAW details */
5866 sc->sc_bar_response(ni, tap, status);
5868 /* Unpause the TID */
5870 * XXX if this is attempt=50, the TID will be downgraded
5871 * XXX to a non-aggregate session. So we must unpause the
5872 * XXX TID here or it'll never be done.
5874 * Also, don't call it if bar_tx/bar_wait are 0; something
5875 * has beaten us to the punch? (XXX figure out what?)
5877 if (status == 0 || attempts == 50) {
5879 if (atid->bar_tx == 0 || atid->bar_wait == 0)
5880 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
5881 "%s: huh? bar_tx=%d, bar_wait=%d\n",
5883 atid->bar_tx, atid->bar_wait);
5885 ath_tx_tid_bar_unsuspend(sc, atid);
5891 * This is called whenever the pending ADDBA request times out.
5892 * Unpause and reschedule the TID.
5895 ath_addba_response_timeout(struct ieee80211_node *ni,
5896 struct ieee80211_tx_ampdu *tap)
5898 struct ath_softc *sc = ni->ni_ic->ic_ifp->if_softc;
5899 int tid = tap->txa_tid;
5900 struct ath_node *an = ATH_NODE(ni);
5901 struct ath_tid *atid = &an->an_tid[tid];
5903 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5904 "%s: %6D: TID=%d, called; resuming\n",
5911 atid->addba_tx_pending = 0;
5914 /* Note: This updates the aggregate state to (again) pending */
5915 sc->sc_addba_response_timeout(ni, tap);
5917 /* Unpause the TID; which reschedules it */
5919 ath_tx_tid_resume(sc, atid);
5924 * Check if a node is asleep or not.
5927 ath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an)
5930 ATH_TX_LOCK_ASSERT(sc);
5932 return (an->an_is_powersave);
5936 * Mark a node as currently "in powersaving."
5937 * This suspends all traffic on the node.
5939 * This must be called with the node/tx locks free.
5941 * XXX TODO: the locking silliness below is due to how the node
5942 * locking currently works. Right now, the node lock is grabbed
5943 * to do rate control lookups and these are done with the TX
5944 * queue lock held. This means the node lock can't be grabbed
5945 * first here or a LOR will occur.
5947 * Eventually (hopefully!) the TX path code will only grab
5948 * the TXQ lock when transmitting and the ath_node lock when
5949 * doing node/TID operations. There are other complications -
5950 * the sched/unsched operations involve walking the per-txq
5951 * 'active tid' list and this requires both locks to be held.
5954 ath_tx_node_sleep(struct ath_softc *sc, struct ath_node *an)
5956 struct ath_tid *atid;
5957 struct ath_txq *txq;
5960 ATH_TX_UNLOCK_ASSERT(sc);
5962 /* Suspend all traffic on the node */
5965 if (an->an_is_powersave) {
5966 DPRINTF(sc, ATH_DEBUG_XMIT,
5967 "%s: %6D: node was already asleep!\n",
5968 __func__, an->an_node.ni_macaddr, ":");
5973 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
5974 atid = &an->an_tid[tid];
5975 txq = sc->sc_ac2q[atid->ac];
5977 ath_tx_tid_pause(sc, atid);
5980 /* Mark node as in powersaving */
5981 an->an_is_powersave = 1;
5987 * Mark a node as currently "awake."
5988 * This resumes all traffic to the node.
5991 ath_tx_node_wakeup(struct ath_softc *sc, struct ath_node *an)
5993 struct ath_tid *atid;
5994 struct ath_txq *txq;
5997 ATH_TX_UNLOCK_ASSERT(sc);
6002 if (an->an_is_powersave == 0) {
6004 DPRINTF(sc, ATH_DEBUG_XMIT,
6005 "%s: an=%p: node was already awake\n",
6010 /* Mark node as awake */
6011 an->an_is_powersave = 0;
6013 * Clear any pending leaked frame requests
6015 an->an_leak_count = 0;
6017 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
6018 atid = &an->an_tid[tid];
6019 txq = sc->sc_ac2q[atid->ac];
6021 ath_tx_tid_resume(sc, atid);
6027 ath_legacy_dma_txsetup(struct ath_softc *sc)
6030 /* nothing new needed */
6035 ath_legacy_dma_txteardown(struct ath_softc *sc)
6038 /* nothing new needed */
6043 ath_xmit_setup_legacy(struct ath_softc *sc)
6046 * For now, just set the descriptor length to sizeof(ath_desc);
6047 * worry about extracting the real length out of the HAL later.
6049 sc->sc_tx_desclen = sizeof(struct ath_desc);
6050 sc->sc_tx_statuslen = sizeof(struct ath_desc);
6051 sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */
6053 sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup;
6054 sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown;
6055 sc->sc_tx.xmit_attach_comp_func = ath_legacy_attach_comp_func;
6057 sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart;
6058 sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff;
6060 sc->sc_tx.xmit_drain = ath_legacy_tx_drain;