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>
64 #include <machine/bus.h>
67 #include <net/if_var.h>
68 #include <net/if_dl.h>
69 #include <net/if_media.h>
70 #include <net/if_types.h>
71 #include <net/if_arp.h>
72 #include <net/ethernet.h>
73 #include <net/if_llc.h>
75 #include <net80211/ieee80211_var.h>
76 #include <net80211/ieee80211_regdomain.h>
77 #ifdef IEEE80211_SUPPORT_SUPERG
78 #include <net80211/ieee80211_superg.h>
80 #ifdef IEEE80211_SUPPORT_TDMA
81 #include <net80211/ieee80211_tdma.h>
83 #include <net80211/ieee80211_ht.h>
88 #include <netinet/in.h>
89 #include <netinet/if_ether.h>
92 #include <dev/ath/if_athvar.h>
93 #include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */
94 #include <dev/ath/ath_hal/ah_diagcodes.h>
96 #include <dev/ath/if_ath_debug.h>
99 #include <dev/ath/ath_tx99/ath_tx99.h>
102 #include <dev/ath/if_ath_misc.h>
103 #include <dev/ath/if_ath_tx.h>
104 #include <dev/ath/if_ath_tx_ht.h>
107 #include <dev/ath/if_ath_alq.h>
111 * How many retries to perform in software
113 #define SWMAX_RETRIES 10
116 * What queue to throw the non-QoS TID traffic into
118 #define ATH_NONQOS_TID_AC WME_AC_VO
121 static int ath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an);
123 static int ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an,
125 static int ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an,
127 static ieee80211_seq ath_tx_tid_seqno_assign(struct ath_softc *sc,
128 struct ieee80211_node *ni, struct ath_buf *bf, struct mbuf *m0);
129 static int ath_tx_action_frame_override_queue(struct ath_softc *sc,
130 struct ieee80211_node *ni, struct mbuf *m0, int *tid);
131 static struct ath_buf *
132 ath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an,
133 struct ath_tid *tid, struct ath_buf *bf);
137 ath_tx_alq_post(struct ath_softc *sc, struct ath_buf *bf_first)
143 /* XXX we should skip out early if debugging isn't enabled! */
147 /* XXX should ensure bf_nseg > 0! */
148 if (bf->bf_nseg == 0)
150 n = ((bf->bf_nseg - 1) / sc->sc_tx_nmaps) + 1;
151 for (i = 0, ds = (const char *) bf->bf_desc;
153 i++, ds += sc->sc_tx_desclen) {
154 if_ath_alq_post(&sc->sc_alq,
162 #endif /* ATH_DEBUG_ALQ */
165 * Whether to use the 11n rate scenario functions or not
168 ath_tx_is_11n(struct ath_softc *sc)
170 return ((sc->sc_ah->ah_magic == 0x20065416) ||
171 (sc->sc_ah->ah_magic == 0x19741014));
175 * Obtain the current TID from the given frame.
177 * Non-QoS frames need to go into TID 16 (IEEE80211_NONQOS_TID.)
178 * This has implications for which AC/priority the packet is placed
182 ath_tx_gettid(struct ath_softc *sc, const struct mbuf *m0)
184 const struct ieee80211_frame *wh;
185 int pri = M_WME_GETAC(m0);
187 wh = mtod(m0, const struct ieee80211_frame *);
188 if (! IEEE80211_QOS_HAS_SEQ(wh))
189 return IEEE80211_NONQOS_TID;
191 return WME_AC_TO_TID(pri);
195 ath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf)
197 struct ieee80211_frame *wh;
199 wh = mtod(bf->bf_m, struct ieee80211_frame *);
200 /* Only update/resync if needed */
201 if (bf->bf_state.bfs_isretried == 0) {
202 wh->i_fc[1] |= IEEE80211_FC1_RETRY;
203 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap,
204 BUS_DMASYNC_PREWRITE);
206 bf->bf_state.bfs_isretried = 1;
207 bf->bf_state.bfs_retries ++;
211 * Determine what the correct AC queue for the given frame
214 * This code assumes that the TIDs map consistently to
215 * the underlying hardware (or software) ath_txq.
216 * Since the sender may try to set an AC which is
217 * arbitrary, non-QoS TIDs may end up being put on
218 * completely different ACs. There's no way to put a
219 * TID into multiple ath_txq's for scheduling, so
220 * for now we override the AC/TXQ selection and set
221 * non-QOS TID frames into the BE queue.
223 * This may be completely incorrect - specifically,
224 * some management frames may end up out of order
225 * compared to the QoS traffic they're controlling.
226 * I'll look into this later.
229 ath_tx_getac(struct ath_softc *sc, const struct mbuf *m0)
231 const struct ieee80211_frame *wh;
232 int pri = M_WME_GETAC(m0);
233 wh = mtod(m0, const struct ieee80211_frame *);
234 if (IEEE80211_QOS_HAS_SEQ(wh))
237 return ATH_NONQOS_TID_AC;
241 ath_txfrag_cleanup(struct ath_softc *sc,
242 ath_bufhead *frags, struct ieee80211_node *ni)
244 struct ath_buf *bf, *next;
246 ATH_TXBUF_LOCK_ASSERT(sc);
248 TAILQ_FOREACH_SAFE(bf, frags, bf_list, next) {
249 /* NB: bf assumed clean */
250 TAILQ_REMOVE(frags, bf, bf_list);
251 ath_returnbuf_head(sc, bf);
252 ieee80211_node_decref(ni);
257 * Setup xmit of a fragmented frame. Allocate a buffer
258 * for each frag and bump the node reference count to
259 * reflect the held reference to be setup by ath_tx_start.
262 ath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags,
263 struct mbuf *m0, struct ieee80211_node *ni)
269 for (m = m0->m_nextpkt; m != NULL; m = m->m_nextpkt) {
270 /* XXX non-management? */
271 bf = _ath_getbuf_locked(sc, ATH_BUFTYPE_NORMAL);
272 if (bf == NULL) { /* out of buffers, cleanup */
273 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: no buffer?\n",
275 ath_txfrag_cleanup(sc, frags, ni);
278 ieee80211_node_incref(ni);
279 TAILQ_INSERT_TAIL(frags, bf, bf_list);
281 ATH_TXBUF_UNLOCK(sc);
283 return !TAILQ_EMPTY(frags);
287 ath_tx_dmasetup(struct ath_softc *sc, struct ath_buf *bf, struct mbuf *m0)
293 * Load the DMA map so any coalescing is done. This
294 * also calculates the number of descriptors we need.
296 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0,
297 bf->bf_segs, &bf->bf_nseg,
299 if (error == EFBIG) {
300 /* XXX packet requires too many descriptors */
301 bf->bf_nseg = ATH_MAX_SCATTER + 1;
302 } else if (error != 0) {
303 sc->sc_stats.ast_tx_busdma++;
304 ieee80211_free_mbuf(m0);
308 * Discard null packets and check for packets that
309 * require too many TX descriptors. We try to convert
310 * the latter to a cluster.
312 if (bf->bf_nseg > ATH_MAX_SCATTER) { /* too many desc's, linearize */
313 sc->sc_stats.ast_tx_linear++;
314 m = m_collapse(m0, M_NOWAIT, ATH_MAX_SCATTER);
316 ieee80211_free_mbuf(m0);
317 sc->sc_stats.ast_tx_nombuf++;
321 error = bus_dmamap_load_mbuf_sg(sc->sc_dmat, bf->bf_dmamap, m0,
322 bf->bf_segs, &bf->bf_nseg,
325 sc->sc_stats.ast_tx_busdma++;
326 ieee80211_free_mbuf(m0);
329 KASSERT(bf->bf_nseg <= ATH_MAX_SCATTER,
330 ("too many segments after defrag; nseg %u", bf->bf_nseg));
331 } else if (bf->bf_nseg == 0) { /* null packet, discard */
332 sc->sc_stats.ast_tx_nodata++;
333 ieee80211_free_mbuf(m0);
336 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: m %p len %u\n",
337 __func__, m0, m0->m_pkthdr.len);
338 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
345 * Chain together segments+descriptors for a frame - 11n or otherwise.
347 * For aggregates, this is called on each frame in the aggregate.
350 ath_tx_chaindesclist(struct ath_softc *sc, struct ath_desc *ds0,
351 struct ath_buf *bf, int is_aggr, int is_first_subframe,
352 int is_last_subframe)
354 struct ath_hal *ah = sc->sc_ah;
357 HAL_DMA_ADDR bufAddrList[4];
358 uint32_t segLenList[4];
363 * XXX There's txdma and txdma_mgmt; the descriptor
366 struct ath_descdma *dd = &sc->sc_txdma;
369 * Fillin the remainder of the descriptor info.
373 * We need the number of TX data pointers in each descriptor.
374 * EDMA and later chips support 4 TX buffers per descriptor;
375 * previous chips just support one.
377 numTxMaps = sc->sc_tx_nmaps;
380 * For EDMA and later chips ensure the TX map is fully populated
381 * before advancing to the next descriptor.
383 ds = (char *) bf->bf_desc;
385 bzero(bufAddrList, sizeof(bufAddrList));
386 bzero(segLenList, sizeof(segLenList));
387 for (i = 0; i < bf->bf_nseg; i++) {
388 bufAddrList[bp] = bf->bf_segs[i].ds_addr;
389 segLenList[bp] = bf->bf_segs[i].ds_len;
393 * Go to the next segment if this isn't the last segment
394 * and there's space in the current TX map.
396 if ((i != bf->bf_nseg - 1) && (bp < numTxMaps))
400 * Last segment or we're out of buffer pointers.
404 if (i == bf->bf_nseg - 1)
405 ath_hal_settxdesclink(ah, (struct ath_desc *) ds, 0);
407 ath_hal_settxdesclink(ah, (struct ath_desc *) ds,
408 bf->bf_daddr + dd->dd_descsize * (dsp + 1));
411 * XXX This assumes that bfs_txq is the actual destination
412 * hardware queue at this point. It may not have been
413 * assigned, it may actually be pointing to the multicast
414 * software TXQ id. These must be fixed!
416 ath_hal_filltxdesc(ah, (struct ath_desc *) ds
419 , bf->bf_descid /* XXX desc id */
420 , bf->bf_state.bfs_tx_queue
421 , isFirstDesc /* first segment */
422 , i == bf->bf_nseg - 1 /* last segment */
423 , (struct ath_desc *) ds0 /* first descriptor */
427 * Make sure the 11n aggregate fields are cleared.
429 * XXX TODO: this doesn't need to be called for
430 * aggregate frames; as it'll be called on all
431 * sub-frames. Since the descriptors are in
432 * non-cacheable memory, this leads to some
433 * rather slow writes on MIPS/ARM platforms.
435 if (ath_tx_is_11n(sc))
436 ath_hal_clr11n_aggr(sc->sc_ah, (struct ath_desc *) ds);
439 * If 11n is enabled, set it up as if it's an aggregate
442 if (is_last_subframe) {
443 ath_hal_set11n_aggr_last(sc->sc_ah,
444 (struct ath_desc *) ds);
445 } else if (is_aggr) {
447 * This clears the aggrlen field; so
448 * the caller needs to call set_aggr_first()!
450 * XXX TODO: don't call this for the first
451 * descriptor in the first frame in an
454 ath_hal_set11n_aggr_middle(sc->sc_ah,
455 (struct ath_desc *) ds,
456 bf->bf_state.bfs_ndelim);
459 bf->bf_lastds = (struct ath_desc *) ds;
462 * Don't forget to skip to the next descriptor.
464 ds += sc->sc_tx_desclen;
468 * .. and don't forget to blank these out!
470 bzero(bufAddrList, sizeof(bufAddrList));
471 bzero(segLenList, sizeof(segLenList));
473 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
477 * Set the rate control fields in the given descriptor based on
478 * the bf_state fields and node state.
480 * The bfs fields should already be set with the relevant rate
481 * control information, including whether MRR is to be enabled.
483 * Since the FreeBSD HAL currently sets up the first TX rate
484 * in ath_hal_setuptxdesc(), this will setup the MRR
485 * conditionally for the pre-11n chips, and call ath_buf_set_rate
486 * unconditionally for 11n chips. These require the 11n rate
487 * scenario to be set if MCS rates are enabled, so it's easier
488 * to just always call it. The caller can then only set rates 2, 3
489 * and 4 if multi-rate retry is needed.
492 ath_tx_set_ratectrl(struct ath_softc *sc, struct ieee80211_node *ni,
495 struct ath_rc_series *rc = bf->bf_state.bfs_rc;
497 /* If mrr is disabled, blank tries 1, 2, 3 */
498 if (! bf->bf_state.bfs_ismrr)
499 rc[1].tries = rc[2].tries = rc[3].tries = 0;
503 * If NOACK is set, just set ntries=1.
505 else if (bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) {
506 rc[1].tries = rc[2].tries = rc[3].tries = 0;
512 * Always call - that way a retried descriptor will
513 * have the MRR fields overwritten.
515 * XXX TODO: see if this is really needed - setting up
516 * the first descriptor should set the MRR fields to 0
519 if (ath_tx_is_11n(sc)) {
520 ath_buf_set_rate(sc, ni, bf);
522 ath_hal_setupxtxdesc(sc->sc_ah, bf->bf_desc
523 , rc[1].ratecode, rc[1].tries
524 , rc[2].ratecode, rc[2].tries
525 , rc[3].ratecode, rc[3].tries
531 * Setup segments+descriptors for an 11n aggregate.
532 * bf_first is the first buffer in the aggregate.
533 * The descriptor list must already been linked together using
537 ath_tx_setds_11n(struct ath_softc *sc, struct ath_buf *bf_first)
539 struct ath_buf *bf, *bf_prev = NULL;
540 struct ath_desc *ds0 = bf_first->bf_desc;
542 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: nframes=%d, al=%d\n",
543 __func__, bf_first->bf_state.bfs_nframes,
544 bf_first->bf_state.bfs_al);
548 if (bf->bf_state.bfs_txrate0 == 0)
549 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: bf=%p, txrate0=%d\n",
551 if (bf->bf_state.bfs_rc[0].ratecode == 0)
552 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: bf=%p, rix0=%d\n",
556 * Setup all descriptors of all subframes - this will
557 * call ath_hal_set11naggrmiddle() on every frame.
560 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
561 "%s: bf=%p, nseg=%d, pktlen=%d, seqno=%d\n",
562 __func__, bf, bf->bf_nseg, bf->bf_state.bfs_pktlen,
563 SEQNO(bf->bf_state.bfs_seqno));
566 * Setup the initial fields for the first descriptor - all
567 * the non-11n specific stuff.
569 ath_hal_setuptxdesc(sc->sc_ah, bf->bf_desc
570 , bf->bf_state.bfs_pktlen /* packet length */
571 , bf->bf_state.bfs_hdrlen /* header length */
572 , bf->bf_state.bfs_atype /* Atheros packet type */
573 , bf->bf_state.bfs_txpower /* txpower */
574 , bf->bf_state.bfs_txrate0
575 , bf->bf_state.bfs_try0 /* series 0 rate/tries */
576 , bf->bf_state.bfs_keyix /* key cache index */
577 , bf->bf_state.bfs_txantenna /* antenna mode */
578 , bf->bf_state.bfs_txflags | HAL_TXDESC_INTREQ /* flags */
579 , bf->bf_state.bfs_ctsrate /* rts/cts rate */
580 , bf->bf_state.bfs_ctsduration /* rts/cts duration */
584 * First descriptor? Setup the rate control and initial
585 * aggregate header information.
587 if (bf == bf_first) {
589 * setup first desc with rate and aggr info
591 ath_tx_set_ratectrl(sc, bf->bf_node, bf);
595 * Setup the descriptors for a multi-descriptor frame.
596 * This is both aggregate and non-aggregate aware.
598 ath_tx_chaindesclist(sc, ds0, bf,
600 !! (bf == bf_first), /* is_first_subframe */
601 !! (bf->bf_next == NULL) /* is_last_subframe */
604 if (bf == bf_first) {
606 * Initialise the first 11n aggregate with the
607 * aggregate length and aggregate enable bits.
609 ath_hal_set11n_aggr_first(sc->sc_ah,
612 bf->bf_state.bfs_ndelim);
616 * Link the last descriptor of the previous frame
617 * to the beginning descriptor of this frame.
620 ath_hal_settxdesclink(sc->sc_ah, bf_prev->bf_lastds,
623 /* Save a copy so we can link the next descriptor in */
629 * Set the first descriptor bf_lastds field to point to
630 * the last descriptor in the last subframe, that's where
631 * the status update will occur.
633 bf_first->bf_lastds = bf_prev->bf_lastds;
636 * And bf_last in the first descriptor points to the end of
637 * the aggregate list.
639 bf_first->bf_last = bf_prev;
642 * For non-AR9300 NICs, which require the rate control
643 * in the final descriptor - let's set that up now.
645 * This is because the filltxdesc() HAL call doesn't
646 * populate the last segment with rate control information
647 * if firstSeg is also true. For non-aggregate frames
648 * that is fine, as the first frame already has rate control
649 * info. But if the last frame in an aggregate has one
650 * descriptor, both firstseg and lastseg will be true and
651 * the rate info isn't copied.
653 * This is inefficient on MIPS/ARM platforms that have
654 * non-cachable memory for TX descriptors, but we'll just
657 * As to why the rate table is stashed in the last descriptor
658 * rather than the first descriptor? Because proctxdesc()
659 * is called on the final descriptor in an MPDU or A-MPDU -
660 * ie, the one that gets updated by the hardware upon
661 * completion. That way proctxdesc() doesn't need to know
662 * about the first _and_ last TX descriptor.
664 ath_hal_setuplasttxdesc(sc->sc_ah, bf_prev->bf_lastds, ds0);
666 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: end\n", __func__);
670 * Hand-off a frame to the multicast TX queue.
672 * This is a software TXQ which will be appended to the CAB queue
673 * during the beacon setup code.
675 * XXX TODO: since the AR9300 EDMA TX queue support wants the QCU ID
676 * as part of the TX descriptor, bf_state.bfs_tx_queue must be updated
677 * with the actual hardware txq, or all of this will fall apart.
679 * XXX It may not be a bad idea to just stuff the QCU ID into bf_state
680 * and retire bfs_tx_queue; then make sure the CABQ QCU ID is populated
684 ath_tx_handoff_mcast(struct ath_softc *sc, struct ath_txq *txq,
687 ATH_TX_LOCK_ASSERT(sc);
689 KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0,
690 ("%s: busy status 0x%x", __func__, bf->bf_flags));
693 * Ensure that the tx queue is the cabq, so things get
696 if (bf->bf_state.bfs_tx_queue != sc->sc_cabq->axq_qnum) {
697 DPRINTF(sc, ATH_DEBUG_XMIT,
698 "%s: bf=%p, bfs_tx_queue=%d, axq_qnum=%d\n",
699 __func__, bf, bf->bf_state.bfs_tx_queue,
704 if (ATH_TXQ_LAST(txq, axq_q_s) != NULL) {
705 struct ath_buf *bf_last = ATH_TXQ_LAST(txq, axq_q_s);
706 struct ieee80211_frame *wh;
708 /* mark previous frame */
709 wh = mtod(bf_last->bf_m, struct ieee80211_frame *);
710 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
711 bus_dmamap_sync(sc->sc_dmat, bf_last->bf_dmamap,
712 BUS_DMASYNC_PREWRITE);
714 /* link descriptor */
715 ath_hal_settxdesclink(sc->sc_ah,
719 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
724 * Hand-off packet to a hardware queue.
727 ath_tx_handoff_hw(struct ath_softc *sc, struct ath_txq *txq,
730 struct ath_hal *ah = sc->sc_ah;
731 struct ath_buf *bf_first;
734 * Insert the frame on the outbound list and pass it on
735 * to the hardware. Multicast frames buffered for power
736 * save stations and transmit from the CAB queue are stored
737 * on a s/w only queue and loaded on to the CAB queue in
738 * the SWBA handler since frames only go out on DTIM and
739 * to avoid possible races.
741 ATH_TX_LOCK_ASSERT(sc);
742 KASSERT((bf->bf_flags & ATH_BUF_BUSY) == 0,
743 ("%s: busy status 0x%x", __func__, bf->bf_flags));
744 KASSERT(txq->axq_qnum != ATH_TXQ_SWQ,
745 ("ath_tx_handoff_hw called for mcast queue"));
748 * XXX We should instead just verify that sc_txstart_cnt
749 * or ath_txproc_cnt > 0. That would mean that
750 * the reset is going to be waiting for us to complete.
752 if (sc->sc_txproc_cnt == 0 && sc->sc_txstart_cnt == 0) {
753 device_printf(sc->sc_dev,
754 "%s: TX dispatch without holding txcount/txstart refcnt!\n",
759 * XXX .. this is going to cause the hardware to get upset;
760 * so we really should find some way to drop or queue
767 * XXX TODO: if there's a holdingbf, then
768 * ATH_TXQ_PUTRUNNING should be clear.
770 * If there is a holdingbf and the list is empty,
771 * then axq_link should be pointing to the holdingbf.
773 * Otherwise it should point to the last descriptor
774 * in the last ath_buf.
776 * In any case, we should really ensure that we
777 * update the previous descriptor link pointer to
778 * this descriptor, regardless of all of the above state.
780 * For now this is captured by having axq_link point
781 * to either the holdingbf (if the TXQ list is empty)
782 * or the end of the list (if the TXQ list isn't empty.)
783 * I'd rather just kill axq_link here and do it as above.
787 * Append the frame to the TX queue.
789 ATH_TXQ_INSERT_TAIL(txq, bf, bf_list);
790 ATH_KTR(sc, ATH_KTR_TX, 3,
791 "ath_tx_handoff: non-tdma: txq=%u, add bf=%p "
798 * If there's a link pointer, update it.
800 * XXX we should replace this with the above logic, just
801 * to kill axq_link with fire.
803 if (txq->axq_link != NULL) {
804 *txq->axq_link = bf->bf_daddr;
805 DPRINTF(sc, ATH_DEBUG_XMIT,
806 "%s: link[%u](%p)=%p (%p) depth %d\n", __func__,
807 txq->axq_qnum, txq->axq_link,
808 (caddr_t)bf->bf_daddr, bf->bf_desc,
810 ATH_KTR(sc, ATH_KTR_TX, 5,
811 "ath_tx_handoff: non-tdma: link[%u](%p)=%p (%p) "
813 txq->axq_qnum, txq->axq_link,
814 (caddr_t)bf->bf_daddr, bf->bf_desc,
819 * If we've not pushed anything into the hardware yet,
820 * push the head of the queue into the TxDP.
822 * Once we've started DMA, there's no guarantee that
823 * updating the TxDP with a new value will actually work.
824 * So we just don't do that - if we hit the end of the list,
825 * we keep that buffer around (the "holding buffer") and
826 * re-start DMA by updating the link pointer of _that_
827 * descriptor and then restart DMA.
829 if (! (txq->axq_flags & ATH_TXQ_PUTRUNNING)) {
830 bf_first = TAILQ_FIRST(&txq->axq_q);
831 txq->axq_flags |= ATH_TXQ_PUTRUNNING;
832 ath_hal_puttxbuf(ah, txq->axq_qnum, bf_first->bf_daddr);
833 DPRINTF(sc, ATH_DEBUG_XMIT,
834 "%s: TXDP[%u] = %p (%p) depth %d\n",
835 __func__, txq->axq_qnum,
836 (caddr_t)bf_first->bf_daddr, bf_first->bf_desc,
838 ATH_KTR(sc, ATH_KTR_TX, 5,
839 "ath_tx_handoff: TXDP[%u] = %p (%p) "
840 "lastds=%p depth %d",
842 (caddr_t)bf_first->bf_daddr, bf_first->bf_desc,
848 * Ensure that the bf TXQ matches this TXQ, so later
849 * checking and holding buffer manipulation is sane.
851 if (bf->bf_state.bfs_tx_queue != txq->axq_qnum) {
852 DPRINTF(sc, ATH_DEBUG_XMIT,
853 "%s: bf=%p, bfs_tx_queue=%d, axq_qnum=%d\n",
854 __func__, bf, bf->bf_state.bfs_tx_queue,
859 * Track aggregate queue depth.
861 if (bf->bf_state.bfs_aggr)
862 txq->axq_aggr_depth++;
865 * Update the link pointer.
867 ath_hal_gettxdesclinkptr(ah, bf->bf_lastds, &txq->axq_link);
872 * If we wrote a TxDP above, DMA will start from here.
874 * If DMA is running, it'll do nothing.
876 * If the DMA engine hit the end of the QCU list (ie LINK=NULL,
877 * or VEOL) then it stops at the last transmitted write.
878 * We then append a new frame by updating the link pointer
879 * in that descriptor and then kick TxE here; it will re-read
880 * that last descriptor and find the new descriptor to transmit.
882 * This is why we keep the holding descriptor around.
884 ath_hal_txstart(ah, txq->axq_qnum);
886 ATH_KTR(sc, ATH_KTR_TX, 1,
887 "ath_tx_handoff: txq=%u, txstart", txq->axq_qnum);
891 * Restart TX DMA for the given TXQ.
893 * This must be called whether the queue is empty or not.
896 ath_legacy_tx_dma_restart(struct ath_softc *sc, struct ath_txq *txq)
898 struct ath_buf *bf, *bf_last;
900 ATH_TXQ_LOCK_ASSERT(txq);
902 /* XXX make this ATH_TXQ_FIRST */
903 bf = TAILQ_FIRST(&txq->axq_q);
904 bf_last = ATH_TXQ_LAST(txq, axq_q_s);
909 DPRINTF(sc, ATH_DEBUG_RESET,
910 "%s: Q%d: bf=%p, bf_last=%p, daddr=0x%08x\n",
915 (uint32_t) bf->bf_daddr);
918 if (sc->sc_debug & ATH_DEBUG_RESET)
919 ath_tx_dump(sc, txq);
923 * This is called from a restart, so DMA is known to be
924 * completely stopped.
926 KASSERT((!(txq->axq_flags & ATH_TXQ_PUTRUNNING)),
927 ("%s: Q%d: called with PUTRUNNING=1\n",
931 ath_hal_puttxbuf(sc->sc_ah, txq->axq_qnum, bf->bf_daddr);
932 txq->axq_flags |= ATH_TXQ_PUTRUNNING;
934 ath_hal_gettxdesclinkptr(sc->sc_ah, bf_last->bf_lastds,
936 ath_hal_txstart(sc->sc_ah, txq->axq_qnum);
940 * Hand off a packet to the hardware (or mcast queue.)
942 * The relevant hardware txq should be locked.
945 ath_legacy_xmit_handoff(struct ath_softc *sc, struct ath_txq *txq,
948 ATH_TX_LOCK_ASSERT(sc);
951 if (if_ath_alq_checkdebug(&sc->sc_alq, ATH_ALQ_EDMA_TXDESC))
952 ath_tx_alq_post(sc, bf);
955 if (txq->axq_qnum == ATH_TXQ_SWQ)
956 ath_tx_handoff_mcast(sc, txq, bf);
958 ath_tx_handoff_hw(sc, txq, bf);
962 ath_tx_tag_crypto(struct ath_softc *sc, struct ieee80211_node *ni,
963 struct mbuf *m0, int iswep, int isfrag, int *hdrlen, int *pktlen,
966 DPRINTF(sc, ATH_DEBUG_XMIT,
967 "%s: hdrlen=%d, pktlen=%d, isfrag=%d, iswep=%d, m0=%p\n",
976 const struct ieee80211_cipher *cip;
977 struct ieee80211_key *k;
980 * Construct the 802.11 header+trailer for an encrypted
981 * frame. The only reason this can fail is because of an
982 * unknown or unsupported cipher/key type.
984 k = ieee80211_crypto_encap(ni, m0);
987 * This can happen when the key is yanked after the
988 * frame was queued. Just discard the frame; the
989 * 802.11 layer counts failures and provides
990 * debugging/diagnostics.
995 * Adjust the packet + header lengths for the crypto
996 * additions and calculate the h/w key index. When
997 * a s/w mic is done the frame will have had any mic
998 * added to it prior to entry so m0->m_pkthdr.len will
999 * account for it. Otherwise we need to add it to the
1003 (*hdrlen) += cip->ic_header;
1004 (*pktlen) += cip->ic_header + cip->ic_trailer;
1005 /* NB: frags always have any TKIP MIC done in s/w */
1006 if ((k->wk_flags & IEEE80211_KEY_SWMIC) == 0 && !isfrag)
1007 (*pktlen) += cip->ic_miclen;
1008 (*keyix) = k->wk_keyix;
1009 } else if (ni->ni_ucastkey.wk_cipher == &ieee80211_cipher_none) {
1011 * Use station key cache slot, if assigned.
1013 (*keyix) = ni->ni_ucastkey.wk_keyix;
1014 if ((*keyix) == IEEE80211_KEYIX_NONE)
1015 (*keyix) = HAL_TXKEYIX_INVALID;
1017 (*keyix) = HAL_TXKEYIX_INVALID;
1023 * Calculate whether interoperability protection is required for
1026 * This requires the rate control information be filled in,
1027 * as the protection requirement depends upon the current
1028 * operating mode / PHY.
1031 ath_tx_calc_protection(struct ath_softc *sc, struct ath_buf *bf)
1033 struct ieee80211_frame *wh;
1037 const HAL_RATE_TABLE *rt = sc->sc_currates;
1038 struct ieee80211com *ic = &sc->sc_ic;
1040 flags = bf->bf_state.bfs_txflags;
1041 rix = bf->bf_state.bfs_rc[0].rix;
1042 shortPreamble = bf->bf_state.bfs_shpream;
1043 wh = mtod(bf->bf_m, struct ieee80211_frame *);
1045 /* Disable frame protection for TOA probe frames */
1046 if (bf->bf_flags & ATH_BUF_TOA_PROBE) {
1048 flags &= ~(HAL_TXDESC_CTSENA | HAL_TXDESC_RTSENA);
1049 bf->bf_state.bfs_doprot = 0;
1054 * If 802.11g protection is enabled, determine whether
1055 * to use RTS/CTS or just CTS. Note that this is only
1056 * done for OFDM unicast frames.
1058 if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
1059 rt->info[rix].phy == IEEE80211_T_OFDM &&
1060 (flags & HAL_TXDESC_NOACK) == 0) {
1061 bf->bf_state.bfs_doprot = 1;
1062 /* XXX fragments must use CCK rates w/ protection */
1063 if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) {
1064 flags |= HAL_TXDESC_RTSENA;
1065 } else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) {
1066 flags |= HAL_TXDESC_CTSENA;
1069 * For frags it would be desirable to use the
1070 * highest CCK rate for RTS/CTS. But stations
1071 * farther away may detect it at a lower CCK rate
1072 * so use the configured protection rate instead
1075 sc->sc_stats.ast_tx_protect++;
1079 * If 11n protection is enabled and it's a HT frame,
1082 * XXX ic_htprotmode or ic_curhtprotmode?
1083 * XXX should it_htprotmode only matter if ic_curhtprotmode
1084 * XXX indicates it's not a HT pure environment?
1086 if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) &&
1087 rt->info[rix].phy == IEEE80211_T_HT &&
1088 (flags & HAL_TXDESC_NOACK) == 0) {
1089 flags |= HAL_TXDESC_RTSENA;
1090 sc->sc_stats.ast_tx_htprotect++;
1094 bf->bf_state.bfs_txflags = flags;
1098 * Update the frame duration given the currently selected rate.
1100 * This also updates the frame duration value, so it will require
1104 ath_tx_calc_duration(struct ath_softc *sc, struct ath_buf *bf)
1106 struct ieee80211_frame *wh;
1110 struct ath_hal *ah = sc->sc_ah;
1111 const HAL_RATE_TABLE *rt = sc->sc_currates;
1112 int isfrag = bf->bf_m->m_flags & M_FRAG;
1114 flags = bf->bf_state.bfs_txflags;
1115 rix = bf->bf_state.bfs_rc[0].rix;
1116 shortPreamble = bf->bf_state.bfs_shpream;
1117 wh = mtod(bf->bf_m, struct ieee80211_frame *);
1120 * Calculate duration. This logically belongs in the 802.11
1121 * layer but it lacks sufficient information to calculate it.
1123 if ((flags & HAL_TXDESC_NOACK) == 0 &&
1124 (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) {
1127 dur = rt->info[rix].spAckDuration;
1129 dur = rt->info[rix].lpAckDuration;
1130 if (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) {
1131 dur += dur; /* additional SIFS+ACK */
1133 * Include the size of next fragment so NAV is
1134 * updated properly. The last fragment uses only
1137 * XXX TODO: ensure that the rate lookup for each
1138 * fragment is the same as the rate used by the
1141 dur += ath_hal_computetxtime(ah,
1149 * Force hardware to use computed duration for next
1150 * fragment by disabling multi-rate retry which updates
1151 * duration based on the multi-rate duration table.
1153 bf->bf_state.bfs_ismrr = 0;
1154 bf->bf_state.bfs_try0 = ATH_TXMGTTRY;
1155 /* XXX update bfs_rc[0].try? */
1158 /* Update the duration field itself */
1159 *(u_int16_t *)wh->i_dur = htole16(dur);
1164 ath_tx_get_rtscts_rate(struct ath_hal *ah, const HAL_RATE_TABLE *rt,
1165 int cix, int shortPreamble)
1170 * CTS transmit rate is derived from the transmit rate
1171 * by looking in the h/w rate table. We must also factor
1172 * in whether or not a short preamble is to be used.
1174 /* NB: cix is set above where RTS/CTS is enabled */
1175 KASSERT(cix != 0xff, ("cix not setup"));
1176 ctsrate = rt->info[cix].rateCode;
1178 /* XXX this should only matter for legacy rates */
1180 ctsrate |= rt->info[cix].shortPreamble;
1186 * Calculate the RTS/CTS duration for legacy frames.
1189 ath_tx_calc_ctsduration(struct ath_hal *ah, int rix, int cix,
1190 int shortPreamble, int pktlen, const HAL_RATE_TABLE *rt,
1193 int ctsduration = 0;
1195 /* This mustn't be called for HT modes */
1196 if (rt->info[cix].phy == IEEE80211_T_HT) {
1197 printf("%s: HT rate where it shouldn't be (0x%x)\n",
1198 __func__, rt->info[cix].rateCode);
1203 * Compute the transmit duration based on the frame
1204 * size and the size of an ACK frame. We call into the
1205 * HAL to do the computation since it depends on the
1206 * characteristics of the actual PHY being used.
1208 * NB: CTS is assumed the same size as an ACK so we can
1209 * use the precalculated ACK durations.
1211 if (shortPreamble) {
1212 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */
1213 ctsduration += rt->info[cix].spAckDuration;
1214 ctsduration += ath_hal_computetxtime(ah,
1215 rt, pktlen, rix, AH_TRUE, AH_TRUE);
1216 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */
1217 ctsduration += rt->info[rix].spAckDuration;
1219 if (flags & HAL_TXDESC_RTSENA) /* SIFS + CTS */
1220 ctsduration += rt->info[cix].lpAckDuration;
1221 ctsduration += ath_hal_computetxtime(ah,
1222 rt, pktlen, rix, AH_FALSE, AH_TRUE);
1223 if ((flags & HAL_TXDESC_NOACK) == 0) /* SIFS + ACK */
1224 ctsduration += rt->info[rix].lpAckDuration;
1227 return (ctsduration);
1231 * Update the given ath_buf with updated rts/cts setup and duration
1234 * To support rate lookups for each software retry, the rts/cts rate
1235 * and cts duration must be re-calculated.
1237 * This function assumes the RTS/CTS flags have been set as needed;
1238 * mrr has been disabled; and the rate control lookup has been done.
1240 * XXX TODO: MRR need only be disabled for the pre-11n NICs.
1241 * XXX The 11n NICs support per-rate RTS/CTS configuration.
1244 ath_tx_set_rtscts(struct ath_softc *sc, struct ath_buf *bf)
1246 uint16_t ctsduration = 0;
1247 uint8_t ctsrate = 0;
1248 uint8_t rix = bf->bf_state.bfs_rc[0].rix;
1250 const HAL_RATE_TABLE *rt = sc->sc_currates;
1253 * No RTS/CTS enabled? Don't bother.
1255 if ((bf->bf_state.bfs_txflags &
1256 (HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA)) == 0) {
1257 /* XXX is this really needed? */
1258 bf->bf_state.bfs_ctsrate = 0;
1259 bf->bf_state.bfs_ctsduration = 0;
1264 * If protection is enabled, use the protection rix control
1265 * rate. Otherwise use the rate0 control rate.
1267 if (bf->bf_state.bfs_doprot)
1268 rix = sc->sc_protrix;
1270 rix = bf->bf_state.bfs_rc[0].rix;
1273 * If the raw path has hard-coded ctsrate0 to something,
1276 if (bf->bf_state.bfs_ctsrate0 != 0)
1277 cix = ath_tx_findrix(sc, bf->bf_state.bfs_ctsrate0);
1279 /* Control rate from above */
1280 cix = rt->info[rix].controlRate;
1282 /* Calculate the rtscts rate for the given cix */
1283 ctsrate = ath_tx_get_rtscts_rate(sc->sc_ah, rt, cix,
1284 bf->bf_state.bfs_shpream);
1286 /* The 11n chipsets do ctsduration calculations for you */
1287 if (! ath_tx_is_11n(sc))
1288 ctsduration = ath_tx_calc_ctsduration(sc->sc_ah, rix, cix,
1289 bf->bf_state.bfs_shpream, bf->bf_state.bfs_pktlen,
1290 rt, bf->bf_state.bfs_txflags);
1292 /* Squirrel away in ath_buf */
1293 bf->bf_state.bfs_ctsrate = ctsrate;
1294 bf->bf_state.bfs_ctsduration = ctsduration;
1297 * Must disable multi-rate retry when using RTS/CTS.
1299 if (!sc->sc_mrrprot) {
1300 bf->bf_state.bfs_ismrr = 0;
1301 bf->bf_state.bfs_try0 =
1302 bf->bf_state.bfs_rc[0].tries = ATH_TXMGTTRY; /* XXX ew */
1307 * Setup the descriptor chain for a normal or fast-frame
1310 * XXX TODO: extend to include the destination hardware QCU ID.
1311 * Make sure that is correct. Make sure that when being added
1312 * to the mcastq, the CABQ QCUID is set or things will get a bit
1316 ath_tx_setds(struct ath_softc *sc, struct ath_buf *bf)
1318 struct ath_desc *ds = bf->bf_desc;
1319 struct ath_hal *ah = sc->sc_ah;
1321 if (bf->bf_state.bfs_txrate0 == 0)
1322 DPRINTF(sc, ATH_DEBUG_XMIT,
1323 "%s: bf=%p, txrate0=%d\n", __func__, bf, 0);
1325 ath_hal_setuptxdesc(ah, ds
1326 , bf->bf_state.bfs_pktlen /* packet length */
1327 , bf->bf_state.bfs_hdrlen /* header length */
1328 , bf->bf_state.bfs_atype /* Atheros packet type */
1329 , bf->bf_state.bfs_txpower /* txpower */
1330 , bf->bf_state.bfs_txrate0
1331 , bf->bf_state.bfs_try0 /* series 0 rate/tries */
1332 , bf->bf_state.bfs_keyix /* key cache index */
1333 , bf->bf_state.bfs_txantenna /* antenna mode */
1334 , bf->bf_state.bfs_txflags /* flags */
1335 , bf->bf_state.bfs_ctsrate /* rts/cts rate */
1336 , bf->bf_state.bfs_ctsduration /* rts/cts duration */
1340 * This will be overriden when the descriptor chain is written.
1345 /* Set rate control and descriptor chain for this frame */
1346 ath_tx_set_ratectrl(sc, bf->bf_node, bf);
1347 ath_tx_chaindesclist(sc, ds, bf, 0, 0, 0);
1353 * This performs a rate lookup for the given ath_buf only if it's required.
1354 * Non-data frames and raw frames don't require it.
1356 * This populates the primary and MRR entries; MRR values are
1357 * then disabled later on if something requires it (eg RTS/CTS on
1360 * This needs to be done before the RTS/CTS fields are calculated
1361 * as they may depend upon the rate chosen.
1364 ath_tx_do_ratelookup(struct ath_softc *sc, struct ath_buf *bf)
1369 if (! bf->bf_state.bfs_doratelookup)
1372 /* Get rid of any previous state */
1373 bzero(bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
1375 ATH_NODE_LOCK(ATH_NODE(bf->bf_node));
1376 ath_rate_findrate(sc, ATH_NODE(bf->bf_node), bf->bf_state.bfs_shpream,
1377 bf->bf_state.bfs_pktlen, &rix, &try0, &rate);
1379 /* In case MRR is disabled, make sure rc[0] is setup correctly */
1380 bf->bf_state.bfs_rc[0].rix = rix;
1381 bf->bf_state.bfs_rc[0].ratecode = rate;
1382 bf->bf_state.bfs_rc[0].tries = try0;
1384 if (bf->bf_state.bfs_ismrr && try0 != ATH_TXMAXTRY)
1385 ath_rate_getxtxrates(sc, ATH_NODE(bf->bf_node), rix,
1386 bf->bf_state.bfs_rc);
1387 ATH_NODE_UNLOCK(ATH_NODE(bf->bf_node));
1389 sc->sc_txrix = rix; /* for LED blinking */
1390 sc->sc_lastdatarix = rix; /* for fast frames */
1391 bf->bf_state.bfs_try0 = try0;
1392 bf->bf_state.bfs_txrate0 = rate;
1396 * Update the CLRDMASK bit in the ath_buf if it needs to be set.
1399 ath_tx_update_clrdmask(struct ath_softc *sc, struct ath_tid *tid,
1402 struct ath_node *an = ATH_NODE(bf->bf_node);
1404 ATH_TX_LOCK_ASSERT(sc);
1406 if (an->clrdmask == 1) {
1407 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
1413 * Return whether this frame should be software queued or
1414 * direct dispatched.
1416 * When doing powersave, BAR frames should be queued but other management
1417 * frames should be directly sent.
1419 * When not doing powersave, stick BAR frames into the hardware queue
1420 * so it goes out even though the queue is paused.
1422 * For now, management frames are also software queued by default.
1425 ath_tx_should_swq_frame(struct ath_softc *sc, struct ath_node *an,
1426 struct mbuf *m0, int *queue_to_head)
1428 struct ieee80211_node *ni = &an->an_node;
1429 struct ieee80211_frame *wh;
1430 uint8_t type, subtype;
1432 wh = mtod(m0, struct ieee80211_frame *);
1433 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1434 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1436 (*queue_to_head) = 0;
1438 /* If it's not in powersave - direct-dispatch BAR */
1439 if ((ATH_NODE(ni)->an_is_powersave == 0)
1440 && type == IEEE80211_FC0_TYPE_CTL &&
1441 subtype == IEEE80211_FC0_SUBTYPE_BAR) {
1442 DPRINTF(sc, ATH_DEBUG_SW_TX,
1443 "%s: BAR: TX'ing direct\n", __func__);
1445 } else if ((ATH_NODE(ni)->an_is_powersave == 1)
1446 && type == IEEE80211_FC0_TYPE_CTL &&
1447 subtype == IEEE80211_FC0_SUBTYPE_BAR) {
1448 /* BAR TX whilst asleep; queue */
1449 DPRINTF(sc, ATH_DEBUG_SW_TX,
1450 "%s: swq: TX'ing\n", __func__);
1451 (*queue_to_head) = 1;
1453 } else if ((ATH_NODE(ni)->an_is_powersave == 1)
1454 && (type == IEEE80211_FC0_TYPE_MGT ||
1455 type == IEEE80211_FC0_TYPE_CTL)) {
1457 * Other control/mgmt frame; bypass software queuing
1460 DPRINTF(sc, ATH_DEBUG_XMIT,
1461 "%s: %6D: Node is asleep; sending mgmt "
1462 "(type=%d, subtype=%d)\n",
1463 __func__, ni->ni_macaddr, ":", type, subtype);
1472 * Transmit the given frame to the hardware.
1474 * The frame must already be setup; rate control must already have
1477 * XXX since the TXQ lock is being held here (and I dislike holding
1478 * it for this long when not doing software aggregation), later on
1479 * break this function into "setup_normal" and "xmit_normal". The
1480 * lock only needs to be held for the ath_tx_handoff call.
1482 * XXX we don't update the leak count here - if we're doing
1483 * direct frame dispatch, we need to be able to do it without
1484 * decrementing the leak count (eg multicast queue frames.)
1487 ath_tx_xmit_normal(struct ath_softc *sc, struct ath_txq *txq,
1490 struct ath_node *an = ATH_NODE(bf->bf_node);
1491 struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid];
1493 ATH_TX_LOCK_ASSERT(sc);
1496 * For now, just enable CLRDMASK. ath_tx_xmit_normal() does
1497 * set a completion handler however it doesn't (yet) properly
1498 * handle the strict ordering requirements needed for normal,
1499 * non-aggregate session frames.
1501 * Once this is implemented, only set CLRDMASK like this for
1502 * frames that must go out - eg management/raw frames.
1504 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
1506 /* Setup the descriptor before handoff */
1507 ath_tx_do_ratelookup(sc, bf);
1508 ath_tx_calc_duration(sc, bf);
1509 ath_tx_calc_protection(sc, bf);
1510 ath_tx_set_rtscts(sc, bf);
1511 ath_tx_rate_fill_rcflags(sc, bf);
1512 ath_tx_setds(sc, bf);
1514 /* Track per-TID hardware queue depth correctly */
1517 /* Assign the completion handler */
1518 bf->bf_comp = ath_tx_normal_comp;
1520 /* Hand off to hardware */
1521 ath_tx_handoff(sc, txq, bf);
1525 * Do the basic frame setup stuff that's required before the frame
1526 * is added to a software queue.
1528 * All frames get mostly the same treatment and it's done once.
1529 * Retransmits fiddle with things like the rate control setup,
1530 * setting the retransmit bit in the packet; doing relevant DMA/bus
1531 * syncing and relinking it (back) into the hardware TX queue.
1533 * Note that this may cause the mbuf to be reallocated, so
1534 * m0 may not be valid.
1537 ath_tx_normal_setup(struct ath_softc *sc, struct ieee80211_node *ni,
1538 struct ath_buf *bf, struct mbuf *m0, struct ath_txq *txq)
1540 struct ieee80211vap *vap = ni->ni_vap;
1541 struct ieee80211com *ic = &sc->sc_ic;
1542 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams;
1543 int error, iswep, ismcast, isfrag, ismrr;
1544 int keyix, hdrlen, pktlen, try0 = 0;
1545 u_int8_t rix = 0, txrate = 0;
1546 struct ath_desc *ds;
1547 struct ieee80211_frame *wh;
1548 u_int subtype, flags;
1550 const HAL_RATE_TABLE *rt;
1551 HAL_BOOL shortPreamble;
1552 struct ath_node *an;
1556 * To ensure that both sequence numbers and the CCMP PN handling
1557 * is "correct", make sure that the relevant TID queue is locked.
1558 * Otherwise the CCMP PN and seqno may appear out of order, causing
1559 * re-ordered frames to have out of order CCMP PN's, resulting
1560 * in many, many frame drops.
1562 ATH_TX_LOCK_ASSERT(sc);
1564 wh = mtod(m0, struct ieee80211_frame *);
1565 iswep = wh->i_fc[1] & IEEE80211_FC1_PROTECTED;
1566 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1567 isfrag = m0->m_flags & M_FRAG;
1568 hdrlen = ieee80211_anyhdrsize(wh);
1570 * Packet length must not include any
1571 * pad bytes; deduct them here.
1573 pktlen = m0->m_pkthdr.len - (hdrlen & 3);
1575 /* Handle encryption twiddling if needed */
1576 if (! ath_tx_tag_crypto(sc, ni, m0, iswep, isfrag, &hdrlen,
1578 ieee80211_free_mbuf(m0);
1582 /* packet header may have moved, reset our local pointer */
1583 wh = mtod(m0, struct ieee80211_frame *);
1585 pktlen += IEEE80211_CRC_LEN;
1588 * Load the DMA map so any coalescing is done. This
1589 * also calculates the number of descriptors we need.
1591 error = ath_tx_dmasetup(sc, bf, m0);
1594 KASSERT((ni != NULL), ("%s: ni=NULL!", __func__));
1595 bf->bf_node = ni; /* NB: held reference */
1596 m0 = bf->bf_m; /* NB: may have changed */
1597 wh = mtod(m0, struct ieee80211_frame *);
1599 /* setup descriptors */
1601 rt = sc->sc_currates;
1602 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
1605 * NB: the 802.11 layer marks whether or not we should
1606 * use short preamble based on the current mode and
1607 * negotiated parameters.
1609 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
1610 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) {
1611 shortPreamble = AH_TRUE;
1612 sc->sc_stats.ast_tx_shortpre++;
1614 shortPreamble = AH_FALSE;
1618 //flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */
1620 ismrr = 0; /* default no multi-rate retry*/
1621 pri = M_WME_GETAC(m0); /* honor classification */
1622 /* XXX use txparams instead of fixed values */
1624 * Calculate Atheros packet type from IEEE80211 packet header,
1625 * setup for rate calculations, and select h/w transmit queue.
1627 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
1628 case IEEE80211_FC0_TYPE_MGT:
1629 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1630 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON)
1631 atype = HAL_PKT_TYPE_BEACON;
1632 else if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1633 atype = HAL_PKT_TYPE_PROBE_RESP;
1634 else if (subtype == IEEE80211_FC0_SUBTYPE_ATIM)
1635 atype = HAL_PKT_TYPE_ATIM;
1637 atype = HAL_PKT_TYPE_NORMAL; /* XXX */
1638 rix = an->an_mgmtrix;
1639 txrate = rt->info[rix].rateCode;
1641 txrate |= rt->info[rix].shortPreamble;
1642 try0 = ATH_TXMGTTRY;
1643 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
1645 case IEEE80211_FC0_TYPE_CTL:
1646 atype = HAL_PKT_TYPE_PSPOLL; /* stop setting of duration */
1647 rix = an->an_mgmtrix;
1648 txrate = rt->info[rix].rateCode;
1650 txrate |= rt->info[rix].shortPreamble;
1651 try0 = ATH_TXMGTTRY;
1652 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
1654 case IEEE80211_FC0_TYPE_DATA:
1655 atype = HAL_PKT_TYPE_NORMAL; /* default */
1657 * Data frames: multicast frames go out at a fixed rate,
1658 * EAPOL frames use the mgmt frame rate; otherwise consult
1659 * the rate control module for the rate to use.
1662 rix = an->an_mcastrix;
1663 txrate = rt->info[rix].rateCode;
1665 txrate |= rt->info[rix].shortPreamble;
1667 } else if (m0->m_flags & M_EAPOL) {
1668 /* XXX? maybe always use long preamble? */
1669 rix = an->an_mgmtrix;
1670 txrate = rt->info[rix].rateCode;
1672 txrate |= rt->info[rix].shortPreamble;
1673 try0 = ATH_TXMAXTRY; /* XXX?too many? */
1676 * Do rate lookup on each TX, rather than using
1677 * the hard-coded TX information decided here.
1680 bf->bf_state.bfs_doratelookup = 1;
1682 if (cap->cap_wmeParams[pri].wmep_noackPolicy)
1683 flags |= HAL_TXDESC_NOACK;
1686 device_printf(sc->sc_dev, "bogus frame type 0x%x (%s)\n",
1687 wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__);
1689 /* XXX free tx dmamap */
1690 ieee80211_free_mbuf(m0);
1695 * There are two known scenarios where the frame AC doesn't match
1696 * what the destination TXQ is.
1698 * + non-QoS frames (eg management?) that the net80211 stack has
1699 * assigned a higher AC to, but since it's a non-QoS TID, it's
1700 * being thrown into TID 16. TID 16 gets the AC_BE queue.
1701 * It's quite possible that management frames should just be
1702 * direct dispatched to hardware rather than go via the software
1703 * queue; that should be investigated in the future. There are
1704 * some specific scenarios where this doesn't make sense, mostly
1705 * surrounding ADDBA request/response - hence why that is special
1708 * + Multicast frames going into the VAP mcast queue. That shows up
1711 * This driver should eventually support separate TID and TXQ locking,
1712 * allowing for arbitrary AC frames to appear on arbitrary software
1713 * queues, being queued to the "correct" hardware queue when needed.
1716 if (txq != sc->sc_ac2q[pri]) {
1717 DPRINTF(sc, ATH_DEBUG_XMIT,
1718 "%s: txq=%p (%d), pri=%d, pri txq=%p (%d)\n",
1724 sc->sc_ac2q[pri]->axq_qnum);
1729 * Calculate miscellaneous flags.
1732 flags |= HAL_TXDESC_NOACK; /* no ack on broad/multicast */
1733 } else if (pktlen > vap->iv_rtsthreshold &&
1734 (ni->ni_ath_flags & IEEE80211_NODE_FF) == 0) {
1735 flags |= HAL_TXDESC_RTSENA; /* RTS based on frame length */
1736 sc->sc_stats.ast_tx_rts++;
1738 if (flags & HAL_TXDESC_NOACK) /* NB: avoid double counting */
1739 sc->sc_stats.ast_tx_noack++;
1740 #ifdef IEEE80211_SUPPORT_TDMA
1741 if (sc->sc_tdma && (flags & HAL_TXDESC_NOACK) == 0) {
1742 DPRINTF(sc, ATH_DEBUG_TDMA,
1743 "%s: discard frame, ACK required w/ TDMA\n", __func__);
1744 sc->sc_stats.ast_tdma_ack++;
1745 /* XXX free tx dmamap */
1746 ieee80211_free_mbuf(m0);
1752 * If it's a frame to do location reporting on,
1753 * communicate it to the HAL.
1755 if (ieee80211_get_toa_params(m0, NULL)) {
1756 device_printf(sc->sc_dev,
1757 "%s: setting TX positioning bit\n", __func__);
1758 flags |= HAL_TXDESC_POS;
1761 * Note: The hardware reports timestamps for
1762 * each of the RX'ed packets as part of the packet
1763 * exchange. So this means things like RTS/CTS
1764 * exchanges, as well as the final ACK.
1766 * So, if you send a RTS-protected NULL data frame,
1767 * you'll get an RX report for the RTS response, then
1768 * an RX report for the NULL frame, and then the TX
1769 * completion at the end.
1771 * NOTE: it doesn't work right for CCK frames;
1772 * there's no channel info data provided unless
1773 * it's OFDM or HT. Will have to dig into it.
1775 flags &= ~(HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA);
1776 bf->bf_flags |= ATH_BUF_TOA_PROBE;
1781 * Placeholder: if you want to transmit with the azimuth
1782 * timestamp in the end of the payload, here's where you
1783 * should set the TXDESC field.
1785 flags |= HAL_TXDESC_HWTS;
1789 * Determine if a tx interrupt should be generated for
1790 * this descriptor. We take a tx interrupt to reap
1791 * descriptors when the h/w hits an EOL condition or
1792 * when the descriptor is specifically marked to generate
1793 * an interrupt. We periodically mark descriptors in this
1794 * way to insure timely replenishing of the supply needed
1795 * for sending frames. Defering interrupts reduces system
1796 * load and potentially allows more concurrent work to be
1797 * done but if done to aggressively can cause senders to
1800 * NB: use >= to deal with sc_txintrperiod changing
1801 * dynamically through sysctl.
1803 if (flags & HAL_TXDESC_INTREQ) {
1804 txq->axq_intrcnt = 0;
1805 } else if (++txq->axq_intrcnt >= sc->sc_txintrperiod) {
1806 flags |= HAL_TXDESC_INTREQ;
1807 txq->axq_intrcnt = 0;
1810 /* This point forward is actual TX bits */
1813 * At this point we are committed to sending the frame
1814 * and we don't need to look at m_nextpkt; clear it in
1815 * case this frame is part of frag chain.
1817 m0->m_nextpkt = NULL;
1819 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT))
1820 ieee80211_dump_pkt(ic, mtod(m0, const uint8_t *), m0->m_len,
1821 sc->sc_hwmap[rix].ieeerate, -1);
1823 if (ieee80211_radiotap_active_vap(vap)) {
1824 sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags;
1826 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
1828 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG;
1829 sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate;
1830 sc->sc_tx_th.wt_txpower = ieee80211_get_node_txpower(ni);
1831 sc->sc_tx_th.wt_antenna = sc->sc_txantenna;
1833 ieee80211_radiotap_tx(vap, m0);
1836 /* Blank the legacy rate array */
1837 bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
1840 * ath_buf_set_rate needs at least one rate/try to setup
1841 * the rate scenario.
1843 bf->bf_state.bfs_rc[0].rix = rix;
1844 bf->bf_state.bfs_rc[0].tries = try0;
1845 bf->bf_state.bfs_rc[0].ratecode = txrate;
1847 /* Store the decided rate index values away */
1848 bf->bf_state.bfs_pktlen = pktlen;
1849 bf->bf_state.bfs_hdrlen = hdrlen;
1850 bf->bf_state.bfs_atype = atype;
1851 bf->bf_state.bfs_txpower = ieee80211_get_node_txpower(ni);
1852 bf->bf_state.bfs_txrate0 = txrate;
1853 bf->bf_state.bfs_try0 = try0;
1854 bf->bf_state.bfs_keyix = keyix;
1855 bf->bf_state.bfs_txantenna = sc->sc_txantenna;
1856 bf->bf_state.bfs_txflags = flags;
1857 bf->bf_state.bfs_shpream = shortPreamble;
1859 /* XXX this should be done in ath_tx_setrate() */
1860 bf->bf_state.bfs_ctsrate0 = 0; /* ie, no hard-coded ctsrate */
1861 bf->bf_state.bfs_ctsrate = 0; /* calculated later */
1862 bf->bf_state.bfs_ctsduration = 0;
1863 bf->bf_state.bfs_ismrr = ismrr;
1869 * Queue a frame to the hardware or software queue.
1871 * This can be called by the net80211 code.
1873 * XXX what about locking? Or, push the seqno assign into the
1874 * XXX aggregate scheduler so its serialised?
1876 * XXX When sending management frames via ath_raw_xmit(),
1877 * should CLRDMASK be set unconditionally?
1880 ath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni,
1881 struct ath_buf *bf, struct mbuf *m0)
1883 struct ieee80211vap *vap = ni->ni_vap;
1884 struct ath_vap *avp = ATH_VAP(vap);
1888 struct ath_txq *txq;
1890 const struct ieee80211_frame *wh;
1891 int is_ampdu, is_ampdu_tx, is_ampdu_pending;
1892 ieee80211_seq seqno;
1893 uint8_t type, subtype;
1896 ATH_TX_LOCK_ASSERT(sc);
1899 * Determine the target hardware queue.
1901 * For multicast frames, the txq gets overridden appropriately
1902 * depending upon the state of PS.
1904 * For any other frame, we do a TID/QoS lookup inside the frame
1905 * to see what the TID should be. If it's a non-QoS frame, the
1906 * AC and TID are overridden. The TID/TXQ code assumes the
1907 * TID is on a predictable hardware TXQ, so we don't support
1908 * having a node TID queued to multiple hardware TXQs.
1909 * This may change in the future but would require some locking
1912 pri = ath_tx_getac(sc, m0);
1913 tid = ath_tx_gettid(sc, m0);
1915 txq = sc->sc_ac2q[pri];
1916 wh = mtod(m0, struct ieee80211_frame *);
1917 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1918 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1919 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1922 * Enforce how deep the multicast queue can grow.
1924 * XXX duplicated in ath_raw_xmit().
1926 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1927 if (sc->sc_cabq->axq_depth + sc->sc_cabq->fifo.axq_depth
1928 > sc->sc_txq_mcastq_maxdepth) {
1929 sc->sc_stats.ast_tx_mcastq_overflow++;
1936 * Enforce how deep the unicast queue can grow.
1938 * If the node is in power save then we don't want
1939 * the software queue to grow too deep, or a node may
1940 * end up consuming all of the ath_buf entries.
1942 * For now, only do this for DATA frames.
1944 * We will want to cap how many management/control
1945 * frames get punted to the software queue so it doesn't
1946 * fill up. But the correct solution isn't yet obvious.
1947 * In any case, this check should at least let frames pass
1948 * that we are direct-dispatching.
1950 * XXX TODO: duplicate this to the raw xmit path!
1952 if (type == IEEE80211_FC0_TYPE_DATA &&
1953 ATH_NODE(ni)->an_is_powersave &&
1954 ATH_NODE(ni)->an_swq_depth >
1955 sc->sc_txq_node_psq_maxdepth) {
1956 sc->sc_stats.ast_tx_node_psq_overflow++;
1962 is_ampdu_tx = ath_tx_ampdu_running(sc, ATH_NODE(ni), tid);
1963 is_ampdu_pending = ath_tx_ampdu_pending(sc, ATH_NODE(ni), tid);
1964 is_ampdu = is_ampdu_tx | is_ampdu_pending;
1966 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ac=%d, is_ampdu=%d\n",
1967 __func__, tid, pri, is_ampdu);
1969 /* Set local packet state, used to queue packets to hardware */
1970 bf->bf_state.bfs_tid = tid;
1971 bf->bf_state.bfs_tx_queue = txq->axq_qnum;
1972 bf->bf_state.bfs_pri = pri;
1976 * When servicing one or more stations in power-save mode
1977 * (or) if there is some mcast data waiting on the mcast
1978 * queue (to prevent out of order delivery) multicast frames
1979 * must be bufferd until after the beacon.
1981 * TODO: we should lock the mcastq before we check the length.
1983 if (sc->sc_cabq_enable && ismcast && (vap->iv_ps_sta || avp->av_mcastq.axq_depth)) {
1984 txq = &avp->av_mcastq;
1986 * Mark the frame as eventually belonging on the CAB
1987 * queue, so the descriptor setup functions will
1988 * correctly initialise the descriptor 'qcuId' field.
1990 bf->bf_state.bfs_tx_queue = sc->sc_cabq->axq_qnum;
1994 /* Do the generic frame setup */
1995 /* XXX should just bzero the bf_state? */
1996 bf->bf_state.bfs_dobaw = 0;
1998 /* A-MPDU TX? Manually set sequence number */
2000 * Don't do it whilst pending; the net80211 layer still
2005 * Always call; this function will
2006 * handle making sure that null data frames
2007 * don't get a sequence number from the current
2008 * TID and thus mess with the BAW.
2010 seqno = ath_tx_tid_seqno_assign(sc, ni, bf, m0);
2013 * Don't add QoS NULL frames to the BAW.
2015 if (IEEE80211_QOS_HAS_SEQ(wh) &&
2016 subtype != IEEE80211_FC0_SUBTYPE_QOS_NULL) {
2017 bf->bf_state.bfs_dobaw = 1;
2022 * If needed, the sequence number has been assigned.
2023 * Squirrel it away somewhere easy to get to.
2025 bf->bf_state.bfs_seqno = M_SEQNO_GET(m0) << IEEE80211_SEQ_SEQ_SHIFT;
2027 /* Is ampdu pending? fetch the seqno and print it out */
2028 if (is_ampdu_pending)
2029 DPRINTF(sc, ATH_DEBUG_SW_TX,
2030 "%s: tid %d: ampdu pending, seqno %d\n",
2031 __func__, tid, M_SEQNO_GET(m0));
2033 /* This also sets up the DMA map */
2034 r = ath_tx_normal_setup(sc, ni, bf, m0, txq);
2039 /* At this point m0 could have changed! */
2044 * If it's a multicast frame, do a direct-dispatch to the
2045 * destination hardware queue. Don't bother software
2049 * If it's a BAR frame, do a direct dispatch to the
2050 * destination hardware queue. Don't bother software
2051 * queuing it, as the TID will now be paused.
2052 * Sending a BAR frame can occur from the net80211 txa timer
2053 * (ie, retries) or from the ath txtask (completion call.)
2054 * It queues directly to hardware because the TID is paused
2055 * at this point (and won't be unpaused until the BAR has
2056 * either been TXed successfully or max retries has been
2060 * Until things are better debugged - if this node is asleep
2061 * and we're sending it a non-BAR frame, direct dispatch it.
2062 * Why? Because we need to figure out what's actually being
2063 * sent - eg, during reassociation/reauthentication after
2064 * the node (last) disappeared whilst asleep, the driver should
2065 * have unpaused/unsleep'ed the node. So until that is
2066 * sorted out, use this workaround.
2068 if (txq == &avp->av_mcastq) {
2069 DPRINTF(sc, ATH_DEBUG_SW_TX,
2070 "%s: bf=%p: mcastq: TX'ing\n", __func__, bf);
2071 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2072 ath_tx_xmit_normal(sc, txq, bf);
2073 } else if (ath_tx_should_swq_frame(sc, ATH_NODE(ni), m0,
2075 ath_tx_swq(sc, ni, txq, queue_to_head, bf);
2077 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2078 ath_tx_xmit_normal(sc, txq, bf);
2082 * For now, since there's no software queue,
2083 * direct-dispatch to the hardware.
2085 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2087 * Update the current leak count if
2088 * we're leaking frames; and set the
2089 * MORE flag as appropriate.
2091 ath_tx_leak_count_update(sc, tid, bf);
2092 ath_tx_xmit_normal(sc, txq, bf);
2099 ath_tx_raw_start(struct ath_softc *sc, struct ieee80211_node *ni,
2100 struct ath_buf *bf, struct mbuf *m0,
2101 const struct ieee80211_bpf_params *params)
2103 struct ieee80211com *ic = &sc->sc_ic;
2104 struct ieee80211vap *vap = ni->ni_vap;
2105 int error, ismcast, ismrr;
2106 int keyix, hdrlen, pktlen, try0, txantenna;
2107 u_int8_t rix, txrate;
2108 struct ieee80211_frame *wh;
2111 const HAL_RATE_TABLE *rt;
2112 struct ath_desc *ds;
2116 uint8_t type, subtype;
2118 struct ath_node *an = ATH_NODE(ni);
2120 ATH_TX_LOCK_ASSERT(sc);
2122 wh = mtod(m0, struct ieee80211_frame *);
2123 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
2124 hdrlen = ieee80211_anyhdrsize(wh);
2126 * Packet length must not include any
2127 * pad bytes; deduct them here.
2129 /* XXX honor IEEE80211_BPF_DATAPAD */
2130 pktlen = m0->m_pkthdr.len - (hdrlen & 3) + IEEE80211_CRC_LEN;
2132 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
2133 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
2135 ATH_KTR(sc, ATH_KTR_TX, 2,
2136 "ath_tx_raw_start: ni=%p, bf=%p, raw", ni, bf);
2138 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: ismcast=%d\n",
2141 pri = params->ibp_pri & 3;
2142 /* Override pri if the frame isn't a QoS one */
2143 if (! IEEE80211_QOS_HAS_SEQ(wh))
2144 pri = ath_tx_getac(sc, m0);
2146 /* XXX If it's an ADDBA, override the correct queue */
2147 do_override = ath_tx_action_frame_override_queue(sc, ni, m0, &o_tid);
2149 /* Map ADDBA to the correct priority */
2152 DPRINTF(sc, ATH_DEBUG_XMIT,
2153 "%s: overriding tid %d pri %d -> %d\n",
2154 __func__, o_tid, pri, TID_TO_WME_AC(o_tid));
2156 pri = TID_TO_WME_AC(o_tid);
2159 /* Handle encryption twiddling if needed */
2160 if (! ath_tx_tag_crypto(sc, ni,
2161 m0, params->ibp_flags & IEEE80211_BPF_CRYPTO, 0,
2162 &hdrlen, &pktlen, &keyix)) {
2163 ieee80211_free_mbuf(m0);
2166 /* packet header may have moved, reset our local pointer */
2167 wh = mtod(m0, struct ieee80211_frame *);
2169 /* Do the generic frame setup */
2170 /* XXX should just bzero the bf_state? */
2171 bf->bf_state.bfs_dobaw = 0;
2173 error = ath_tx_dmasetup(sc, bf, m0);
2176 m0 = bf->bf_m; /* NB: may have changed */
2177 wh = mtod(m0, struct ieee80211_frame *);
2178 KASSERT((ni != NULL), ("%s: ni=NULL!", __func__));
2179 bf->bf_node = ni; /* NB: held reference */
2181 /* Always enable CLRDMASK for raw frames for now.. */
2182 flags = HAL_TXDESC_CLRDMASK; /* XXX needed for crypto errs */
2183 flags |= HAL_TXDESC_INTREQ; /* force interrupt */
2184 if (params->ibp_flags & IEEE80211_BPF_RTS)
2185 flags |= HAL_TXDESC_RTSENA;
2186 else if (params->ibp_flags & IEEE80211_BPF_CTS) {
2187 /* XXX assume 11g/11n protection? */
2188 bf->bf_state.bfs_doprot = 1;
2189 flags |= HAL_TXDESC_CTSENA;
2191 /* XXX leave ismcast to injector? */
2192 if ((params->ibp_flags & IEEE80211_BPF_NOACK) || ismcast)
2193 flags |= HAL_TXDESC_NOACK;
2195 rt = sc->sc_currates;
2196 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
2198 /* Fetch first rate information */
2199 rix = ath_tx_findrix(sc, params->ibp_rate0);
2200 try0 = params->ibp_try0;
2203 * Override EAPOL rate as appropriate.
2205 if (m0->m_flags & M_EAPOL) {
2206 /* XXX? maybe always use long preamble? */
2207 rix = an->an_mgmtrix;
2208 try0 = ATH_TXMAXTRY; /* XXX?too many? */
2212 * If it's a frame to do location reporting on,
2213 * communicate it to the HAL.
2215 if (ieee80211_get_toa_params(m0, NULL)) {
2216 device_printf(sc->sc_dev,
2217 "%s: setting TX positioning bit\n", __func__);
2218 flags |= HAL_TXDESC_POS;
2219 flags &= ~(HAL_TXDESC_RTSENA | HAL_TXDESC_CTSENA);
2220 bf->bf_flags |= ATH_BUF_TOA_PROBE;
2223 txrate = rt->info[rix].rateCode;
2224 if (params->ibp_flags & IEEE80211_BPF_SHORTPRE)
2225 txrate |= rt->info[rix].shortPreamble;
2227 ismrr = (params->ibp_try1 != 0);
2228 txantenna = params->ibp_pri >> 2;
2229 if (txantenna == 0) /* XXX? */
2230 txantenna = sc->sc_txantenna;
2233 * Since ctsrate is fixed, store it away for later
2234 * use when the descriptor fields are being set.
2236 if (flags & (HAL_TXDESC_RTSENA|HAL_TXDESC_CTSENA))
2237 bf->bf_state.bfs_ctsrate0 = params->ibp_ctsrate;
2240 * NB: we mark all packets as type PSPOLL so the h/w won't
2241 * set the sequence number, duration, etc.
2243 atype = HAL_PKT_TYPE_PSPOLL;
2245 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT))
2246 ieee80211_dump_pkt(ic, mtod(m0, caddr_t), m0->m_len,
2247 sc->sc_hwmap[rix].ieeerate, -1);
2249 if (ieee80211_radiotap_active_vap(vap)) {
2250 sc->sc_tx_th.wt_flags = sc->sc_hwmap[rix].txflags;
2251 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED)
2252 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
2253 if (m0->m_flags & M_FRAG)
2254 sc->sc_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_FRAG;
2255 sc->sc_tx_th.wt_rate = sc->sc_hwmap[rix].ieeerate;
2256 sc->sc_tx_th.wt_txpower = MIN(params->ibp_power,
2257 ieee80211_get_node_txpower(ni));
2258 sc->sc_tx_th.wt_antenna = sc->sc_txantenna;
2260 ieee80211_radiotap_tx(vap, m0);
2264 * Formulate first tx descriptor with tx controls.
2267 /* XXX check return value? */
2269 /* Store the decided rate index values away */
2270 bf->bf_state.bfs_pktlen = pktlen;
2271 bf->bf_state.bfs_hdrlen = hdrlen;
2272 bf->bf_state.bfs_atype = atype;
2273 bf->bf_state.bfs_txpower = MIN(params->ibp_power,
2274 ieee80211_get_node_txpower(ni));
2275 bf->bf_state.bfs_txrate0 = txrate;
2276 bf->bf_state.bfs_try0 = try0;
2277 bf->bf_state.bfs_keyix = keyix;
2278 bf->bf_state.bfs_txantenna = txantenna;
2279 bf->bf_state.bfs_txflags = flags;
2280 bf->bf_state.bfs_shpream =
2281 !! (params->ibp_flags & IEEE80211_BPF_SHORTPRE);
2283 /* Set local packet state, used to queue packets to hardware */
2284 bf->bf_state.bfs_tid = WME_AC_TO_TID(pri);
2285 bf->bf_state.bfs_tx_queue = sc->sc_ac2q[pri]->axq_qnum;
2286 bf->bf_state.bfs_pri = pri;
2288 /* XXX this should be done in ath_tx_setrate() */
2289 bf->bf_state.bfs_ctsrate = 0;
2290 bf->bf_state.bfs_ctsduration = 0;
2291 bf->bf_state.bfs_ismrr = ismrr;
2293 /* Blank the legacy rate array */
2294 bzero(&bf->bf_state.bfs_rc, sizeof(bf->bf_state.bfs_rc));
2296 bf->bf_state.bfs_rc[0].rix = rix;
2297 bf->bf_state.bfs_rc[0].tries = try0;
2298 bf->bf_state.bfs_rc[0].ratecode = txrate;
2303 rix = ath_tx_findrix(sc, params->ibp_rate1);
2304 bf->bf_state.bfs_rc[1].rix = rix;
2305 bf->bf_state.bfs_rc[1].tries = params->ibp_try1;
2307 rix = ath_tx_findrix(sc, params->ibp_rate2);
2308 bf->bf_state.bfs_rc[2].rix = rix;
2309 bf->bf_state.bfs_rc[2].tries = params->ibp_try2;
2311 rix = ath_tx_findrix(sc, params->ibp_rate3);
2312 bf->bf_state.bfs_rc[3].rix = rix;
2313 bf->bf_state.bfs_rc[3].tries = params->ibp_try3;
2316 * All the required rate control decisions have been made;
2317 * fill in the rc flags.
2319 ath_tx_rate_fill_rcflags(sc, bf);
2321 /* NB: no buffered multicast in power save support */
2324 * If we're overiding the ADDBA destination, dump directly
2325 * into the hardware queue, right after any pending
2326 * frames to that node are.
2328 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: dooverride=%d\n",
2329 __func__, do_override);
2333 * Put addba frames in the right place in the right TID/HWQ.
2336 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2338 * XXX if it's addba frames, should we be leaking
2339 * them out via the frame leak method?
2340 * XXX for now let's not risk it; but we may wish
2341 * to investigate this later.
2343 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2344 } else if (ath_tx_should_swq_frame(sc, ATH_NODE(ni), m0,
2346 /* Queue to software queue */
2347 ath_tx_swq(sc, ni, sc->sc_ac2q[pri], queue_to_head, bf);
2349 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2350 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2353 /* Direct-dispatch to the hardware */
2354 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
2356 * Update the current leak count if
2357 * we're leaking frames; and set the
2358 * MORE flag as appropriate.
2360 ath_tx_leak_count_update(sc, tid, bf);
2361 ath_tx_xmit_normal(sc, sc->sc_ac2q[pri], bf);
2369 * This can be called by net80211.
2372 ath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
2373 const struct ieee80211_bpf_params *params)
2375 struct ieee80211com *ic = ni->ni_ic;
2376 struct ath_softc *sc = ic->ic_softc;
2378 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
2382 if (sc->sc_inreset_cnt > 0) {
2383 DPRINTF(sc, ATH_DEBUG_XMIT,
2384 "%s: sc_inreset_cnt > 0; bailing\n", __func__);
2389 sc->sc_txstart_cnt++;
2392 /* Wake the hardware up already */
2394 ath_power_set_power_state(sc, HAL_PM_AWAKE);
2399 if (!sc->sc_running || sc->sc_invalid) {
2400 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: discard frame, r/i: %d/%d",
2401 __func__, sc->sc_running, sc->sc_invalid);
2408 * Enforce how deep the multicast queue can grow.
2410 * XXX duplicated in ath_tx_start().
2412 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2413 if (sc->sc_cabq->axq_depth + sc->sc_cabq->fifo.axq_depth
2414 > sc->sc_txq_mcastq_maxdepth) {
2415 sc->sc_stats.ast_tx_mcastq_overflow++;
2426 * Grab a TX buffer and associated resources.
2428 bf = ath_getbuf(sc, ATH_BUFTYPE_MGMT);
2430 sc->sc_stats.ast_tx_nobuf++;
2435 ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: m=%p, params=%p, bf=%p\n",
2438 if (params == NULL) {
2440 * Legacy path; interpret frame contents to decide
2441 * precisely how to send the frame.
2443 if (ath_tx_start(sc, ni, bf, m)) {
2444 error = EIO; /* XXX */
2449 * Caller supplied explicit parameters to use in
2450 * sending the frame.
2452 if (ath_tx_raw_start(sc, ni, bf, m, params)) {
2453 error = EIO; /* XXX */
2457 sc->sc_wd_timer = 5;
2458 sc->sc_stats.ast_tx_raw++;
2461 * Update the TIM - if there's anything queued to the
2462 * software queue and power save is enabled, we should
2465 ath_tx_update_tim(sc, ni, 1);
2470 sc->sc_txstart_cnt--;
2474 /* Put the hardware back to sleep if required */
2476 ath_power_restore_power_state(sc);
2482 ATH_KTR(sc, ATH_KTR_TX, 3, "ath_raw_xmit: bad2: m=%p, params=%p, "
2488 ath_returnbuf_head(sc, bf);
2489 ATH_TXBUF_UNLOCK(sc);
2495 sc->sc_txstart_cnt--;
2498 /* Put the hardware back to sleep if required */
2500 ath_power_restore_power_state(sc);
2504 ATH_KTR(sc, ATH_KTR_TX, 2, "ath_raw_xmit: bad0: m=%p, params=%p",
2506 sc->sc_stats.ast_tx_raw_fail++;
2511 /* Some helper functions */
2514 * ADDBA (and potentially others) need to be placed in the same
2515 * hardware queue as the TID/node it's relating to. This is so
2516 * it goes out after any pending non-aggregate frames to the
2519 * If this isn't done, the ADDBA can go out before the frames
2520 * queued in hardware. Even though these frames have a sequence
2521 * number -earlier- than the ADDBA can be transmitted (but
2522 * no frames whose sequence numbers are after the ADDBA should
2523 * be!) they'll arrive after the ADDBA - and the receiving end
2524 * will simply drop them as being out of the BAW.
2526 * The frames can't be appended to the TID software queue - it'll
2527 * never be sent out. So these frames have to be directly
2528 * dispatched to the hardware, rather than queued in software.
2529 * So if this function returns true, the TXQ has to be
2530 * overridden and it has to be directly dispatched.
2532 * It's a dirty hack, but someone's gotta do it.
2536 * XXX doesn't belong here!
2539 ieee80211_is_action(struct ieee80211_frame *wh)
2541 /* Type: Management frame? */
2542 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) !=
2543 IEEE80211_FC0_TYPE_MGT)
2546 /* Subtype: Action frame? */
2547 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) !=
2548 IEEE80211_FC0_SUBTYPE_ACTION)
2554 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
2556 * Return an alternate TID for ADDBA request frames.
2558 * Yes, this likely should be done in the net80211 layer.
2561 ath_tx_action_frame_override_queue(struct ath_softc *sc,
2562 struct ieee80211_node *ni,
2563 struct mbuf *m0, int *tid)
2565 struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *);
2566 struct ieee80211_action_ba_addbarequest *ia;
2568 uint16_t baparamset;
2570 /* Not action frame? Bail */
2571 if (! ieee80211_is_action(wh))
2574 /* XXX Not needed for frames we send? */
2576 /* Correct length? */
2577 if (! ieee80211_parse_action(ni, m))
2581 /* Extract out action frame */
2582 frm = (u_int8_t *)&wh[1];
2583 ia = (struct ieee80211_action_ba_addbarequest *) frm;
2585 /* Not ADDBA? Bail */
2586 if (ia->rq_header.ia_category != IEEE80211_ACTION_CAT_BA)
2588 if (ia->rq_header.ia_action != IEEE80211_ACTION_BA_ADDBA_REQUEST)
2591 /* Extract TID, return it */
2592 baparamset = le16toh(ia->rq_baparamset);
2593 *tid = (int) MS(baparamset, IEEE80211_BAPS_TID);
2599 /* Per-node software queue operations */
2602 * Add the current packet to the given BAW.
2603 * It is assumed that the current packet
2605 * + fits inside the BAW;
2606 * + already has had a sequence number allocated.
2608 * Since the BAW status may be modified by both the ath task and
2609 * the net80211/ifnet contexts, the TID must be locked.
2612 ath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an,
2613 struct ath_tid *tid, struct ath_buf *bf)
2616 struct ieee80211_tx_ampdu *tap;
2618 ATH_TX_LOCK_ASSERT(sc);
2620 if (bf->bf_state.bfs_isretried)
2623 tap = ath_tx_get_tx_tid(an, tid->tid);
2625 if (! bf->bf_state.bfs_dobaw) {
2626 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2627 "%s: dobaw=0, seqno=%d, window %d:%d\n",
2628 __func__, SEQNO(bf->bf_state.bfs_seqno),
2629 tap->txa_start, tap->txa_wnd);
2632 if (bf->bf_state.bfs_addedbaw)
2633 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2634 "%s: re-added? tid=%d, seqno %d; window %d:%d; "
2635 "baw head=%d tail=%d\n",
2636 __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2637 tap->txa_start, tap->txa_wnd, tid->baw_head,
2641 * Verify that the given sequence number is not outside of the
2642 * BAW. Complain loudly if that's the case.
2644 if (! BAW_WITHIN(tap->txa_start, tap->txa_wnd,
2645 SEQNO(bf->bf_state.bfs_seqno))) {
2646 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2647 "%s: bf=%p: outside of BAW?? tid=%d, seqno %d; window %d:%d; "
2648 "baw head=%d tail=%d\n",
2649 __func__, bf, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2650 tap->txa_start, tap->txa_wnd, tid->baw_head,
2655 * ni->ni_txseqs[] is the currently allocated seqno.
2656 * the txa state contains the current baw start.
2658 index = ATH_BA_INDEX(tap->txa_start, SEQNO(bf->bf_state.bfs_seqno));
2659 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2660 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2661 "%s: tid=%d, seqno %d; window %d:%d; index=%d cindex=%d "
2662 "baw head=%d tail=%d\n",
2663 __func__, tid->tid, SEQNO(bf->bf_state.bfs_seqno),
2664 tap->txa_start, tap->txa_wnd, index, cindex, tid->baw_head,
2669 assert(tid->tx_buf[cindex] == NULL);
2671 if (tid->tx_buf[cindex] != NULL) {
2672 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2673 "%s: ba packet dup (index=%d, cindex=%d, "
2674 "head=%d, tail=%d)\n",
2675 __func__, index, cindex, tid->baw_head, tid->baw_tail);
2676 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2677 "%s: BA bf: %p; seqno=%d ; new bf: %p; seqno=%d\n",
2679 tid->tx_buf[cindex],
2680 SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno),
2682 SEQNO(bf->bf_state.bfs_seqno)
2685 tid->tx_buf[cindex] = bf;
2687 if (index >= ((tid->baw_tail - tid->baw_head) &
2688 (ATH_TID_MAX_BUFS - 1))) {
2689 tid->baw_tail = cindex;
2690 INCR(tid->baw_tail, ATH_TID_MAX_BUFS);
2695 * Flip the BAW buffer entry over from the existing one to the new one.
2697 * When software retransmitting a (sub-)frame, it is entirely possible that
2698 * the frame ath_buf is marked as BUSY and can't be immediately reused.
2699 * In that instance the buffer is cloned and the new buffer is used for
2700 * retransmit. We thus need to update the ath_buf slot in the BAW buf
2701 * tracking array to maintain consistency.
2704 ath_tx_switch_baw_buf(struct ath_softc *sc, struct ath_node *an,
2705 struct ath_tid *tid, struct ath_buf *old_bf, struct ath_buf *new_bf)
2708 struct ieee80211_tx_ampdu *tap;
2709 int seqno = SEQNO(old_bf->bf_state.bfs_seqno);
2711 ATH_TX_LOCK_ASSERT(sc);
2713 tap = ath_tx_get_tx_tid(an, tid->tid);
2714 index = ATH_BA_INDEX(tap->txa_start, seqno);
2715 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2718 * Just warn for now; if it happens then we should find out
2719 * about it. It's highly likely the aggregation session will
2722 if (old_bf->bf_state.bfs_seqno != new_bf->bf_state.bfs_seqno) {
2723 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2724 "%s: retransmitted buffer"
2725 " has mismatching seqno's, BA session may hang.\n",
2727 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2728 "%s: old seqno=%d, new_seqno=%d\n", __func__,
2729 old_bf->bf_state.bfs_seqno, new_bf->bf_state.bfs_seqno);
2732 if (tid->tx_buf[cindex] != old_bf) {
2733 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2734 "%s: ath_buf pointer incorrect; "
2735 " has m BA session may hang.\n", __func__);
2736 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2737 "%s: old bf=%p, new bf=%p\n", __func__, old_bf, new_bf);
2740 tid->tx_buf[cindex] = new_bf;
2744 * seq_start - left edge of BAW
2745 * seq_next - current/next sequence number to allocate
2747 * Since the BAW status may be modified by both the ath task and
2748 * the net80211/ifnet contexts, the TID must be locked.
2751 ath_tx_update_baw(struct ath_softc *sc, struct ath_node *an,
2752 struct ath_tid *tid, const struct ath_buf *bf)
2755 struct ieee80211_tx_ampdu *tap;
2756 int seqno = SEQNO(bf->bf_state.bfs_seqno);
2758 ATH_TX_LOCK_ASSERT(sc);
2760 tap = ath_tx_get_tx_tid(an, tid->tid);
2761 index = ATH_BA_INDEX(tap->txa_start, seqno);
2762 cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1);
2764 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2765 "%s: tid=%d, baw=%d:%d, seqno=%d, index=%d, cindex=%d, "
2766 "baw head=%d, tail=%d\n",
2767 __func__, tid->tid, tap->txa_start, tap->txa_wnd, seqno, index,
2768 cindex, tid->baw_head, tid->baw_tail);
2771 * If this occurs then we have a big problem - something else
2772 * has slid tap->txa_start along without updating the BAW
2773 * tracking start/end pointers. Thus the TX BAW state is now
2774 * completely busted.
2776 * But for now, since I haven't yet fixed TDMA and buffer cloning,
2777 * it's quite possible that a cloned buffer is making its way
2778 * here and causing it to fire off. Disable TDMA for now.
2780 if (tid->tx_buf[cindex] != bf) {
2781 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2782 "%s: comp bf=%p, seq=%d; slot bf=%p, seqno=%d\n",
2783 __func__, bf, SEQNO(bf->bf_state.bfs_seqno),
2784 tid->tx_buf[cindex],
2785 (tid->tx_buf[cindex] != NULL) ?
2786 SEQNO(tid->tx_buf[cindex]->bf_state.bfs_seqno) : -1);
2789 tid->tx_buf[cindex] = NULL;
2791 while (tid->baw_head != tid->baw_tail &&
2792 !tid->tx_buf[tid->baw_head]) {
2793 INCR(tap->txa_start, IEEE80211_SEQ_RANGE);
2794 INCR(tid->baw_head, ATH_TID_MAX_BUFS);
2796 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
2797 "%s: tid=%d: baw is now %d:%d, baw head=%d\n",
2798 __func__, tid->tid, tap->txa_start, tap->txa_wnd, tid->baw_head);
2802 ath_tx_leak_count_update(struct ath_softc *sc, struct ath_tid *tid,
2805 struct ieee80211_frame *wh;
2807 ATH_TX_LOCK_ASSERT(sc);
2809 if (tid->an->an_leak_count > 0) {
2810 wh = mtod(bf->bf_m, struct ieee80211_frame *);
2813 * Update MORE based on the software/net80211 queue states.
2815 if ((tid->an->an_stack_psq > 0)
2816 || (tid->an->an_swq_depth > 0))
2817 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
2819 wh->i_fc[1] &= ~IEEE80211_FC1_MORE_DATA;
2821 DPRINTF(sc, ATH_DEBUG_NODE_PWRSAVE,
2822 "%s: %6D: leak count = %d, psq=%d, swq=%d, MORE=%d\n",
2824 tid->an->an_node.ni_macaddr,
2826 tid->an->an_leak_count,
2827 tid->an->an_stack_psq,
2828 tid->an->an_swq_depth,
2829 !! (wh->i_fc[1] & IEEE80211_FC1_MORE_DATA));
2832 * Re-sync the underlying buffer.
2834 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap,
2835 BUS_DMASYNC_PREWRITE);
2837 tid->an->an_leak_count --;
2842 ath_tx_tid_can_tx_or_sched(struct ath_softc *sc, struct ath_tid *tid)
2845 ATH_TX_LOCK_ASSERT(sc);
2847 if (tid->an->an_leak_count > 0) {
2856 * Mark the current node/TID as ready to TX.
2858 * This is done to make it easy for the software scheduler to
2859 * find which nodes have data to send.
2861 * The TXQ lock must be held.
2864 ath_tx_tid_sched(struct ath_softc *sc, struct ath_tid *tid)
2866 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
2868 ATH_TX_LOCK_ASSERT(sc);
2871 * If we are leaking out a frame to this destination
2872 * for PS-POLL, ensure that we allow scheduling to
2875 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
2876 return; /* paused, can't schedule yet */
2879 return; /* already scheduled */
2885 * If this is a sleeping node we're leaking to, given
2886 * it a higher priority. This is so bad for QoS it hurts.
2888 if (tid->an->an_leak_count) {
2889 TAILQ_INSERT_HEAD(&txq->axq_tidq, tid, axq_qelem);
2891 TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem);
2896 * We can't do the above - it'll confuse the TXQ software
2897 * scheduler which will keep checking the _head_ TID
2898 * in the list to see if it has traffic. If we queue
2899 * a TID to the head of the list and it doesn't transmit,
2900 * we'll check it again.
2902 * So, get the rest of this leaking frames support working
2903 * and reliable first and _then_ optimise it so they're
2904 * pushed out in front of any other pending software
2907 TAILQ_INSERT_TAIL(&txq->axq_tidq, tid, axq_qelem);
2911 * Mark the current node as no longer needing to be polled for
2914 * The TXQ lock must be held.
2917 ath_tx_tid_unsched(struct ath_softc *sc, struct ath_tid *tid)
2919 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
2921 ATH_TX_LOCK_ASSERT(sc);
2923 if (tid->sched == 0)
2927 TAILQ_REMOVE(&txq->axq_tidq, tid, axq_qelem);
2931 * Assign a sequence number manually to the given frame.
2933 * This should only be called for A-MPDU TX frames.
2935 static ieee80211_seq
2936 ath_tx_tid_seqno_assign(struct ath_softc *sc, struct ieee80211_node *ni,
2937 struct ath_buf *bf, struct mbuf *m0)
2939 struct ieee80211_frame *wh;
2941 ieee80211_seq seqno;
2945 wh = mtod(m0, struct ieee80211_frame *);
2946 pri = M_WME_GETAC(m0); /* honor classification */
2947 tid = WME_AC_TO_TID(pri);
2948 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pri=%d, tid=%d, qos has seq=%d\n",
2949 __func__, pri, tid, IEEE80211_QOS_HAS_SEQ(wh));
2951 /* XXX Is it a control frame? Ignore */
2953 /* Does the packet require a sequence number? */
2954 if (! IEEE80211_QOS_HAS_SEQ(wh))
2957 ATH_TX_LOCK_ASSERT(sc);
2960 * Is it a QOS NULL Data frame? Give it a sequence number from
2961 * the default TID (IEEE80211_NONQOS_TID.)
2963 * The RX path of everything I've looked at doesn't include the NULL
2964 * data frame sequence number in the aggregation state updates, so
2965 * assigning it a sequence number there will cause a BAW hole on the
2968 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
2969 if (subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) {
2970 /* XXX no locking for this TID? This is a bit of a problem. */
2971 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID];
2972 INCR(ni->ni_txseqs[IEEE80211_NONQOS_TID], IEEE80211_SEQ_RANGE);
2974 /* Manually assign sequence number */
2975 seqno = ni->ni_txseqs[tid];
2976 INCR(ni->ni_txseqs[tid], IEEE80211_SEQ_RANGE);
2978 *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
2979 M_SEQNO_SET(m0, seqno);
2981 /* Return so caller can do something with it if needed */
2982 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: -> seqno=%d\n", __func__, seqno);
2987 * Attempt to direct dispatch an aggregate frame to hardware.
2988 * If the frame is out of BAW, queue.
2989 * Otherwise, schedule it as a single frame.
2992 ath_tx_xmit_aggr(struct ath_softc *sc, struct ath_node *an,
2993 struct ath_txq *txq, struct ath_buf *bf)
2995 struct ath_tid *tid = &an->an_tid[bf->bf_state.bfs_tid];
2996 struct ieee80211_tx_ampdu *tap;
2998 ATH_TX_LOCK_ASSERT(sc);
3000 tap = ath_tx_get_tx_tid(an, tid->tid);
3003 if (! ath_tx_tid_can_tx_or_sched(sc, tid)) {
3004 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
3005 /* XXX don't sched - we're paused! */
3009 /* outside baw? queue */
3010 if (bf->bf_state.bfs_dobaw &&
3011 (! BAW_WITHIN(tap->txa_start, tap->txa_wnd,
3012 SEQNO(bf->bf_state.bfs_seqno)))) {
3013 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
3014 ath_tx_tid_sched(sc, tid);
3019 * This is a temporary check and should be removed once
3020 * all the relevant code paths have been fixed.
3022 * During aggregate retries, it's possible that the head
3023 * frame will fail (which has the bfs_aggr and bfs_nframes
3024 * fields set for said aggregate) and will be retried as
3025 * a single frame. In this instance, the values should
3026 * be reset or the completion code will get upset with you.
3028 if (bf->bf_state.bfs_aggr != 0 || bf->bf_state.bfs_nframes > 1) {
3029 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
3030 "%s: bfs_aggr=%d, bfs_nframes=%d\n", __func__,
3031 bf->bf_state.bfs_aggr, bf->bf_state.bfs_nframes);
3032 bf->bf_state.bfs_aggr = 0;
3033 bf->bf_state.bfs_nframes = 1;
3036 /* Update CLRDMASK just before this frame is queued */
3037 ath_tx_update_clrdmask(sc, tid, bf);
3039 /* Direct dispatch to hardware */
3040 ath_tx_do_ratelookup(sc, bf);
3041 ath_tx_calc_duration(sc, bf);
3042 ath_tx_calc_protection(sc, bf);
3043 ath_tx_set_rtscts(sc, bf);
3044 ath_tx_rate_fill_rcflags(sc, bf);
3045 ath_tx_setds(sc, bf);
3048 sc->sc_aggr_stats.aggr_low_hwq_single_pkt++;
3050 /* Track per-TID hardware queue depth correctly */
3054 if (bf->bf_state.bfs_dobaw) {
3055 ath_tx_addto_baw(sc, an, tid, bf);
3056 bf->bf_state.bfs_addedbaw = 1;
3059 /* Set completion handler, multi-frame aggregate or not */
3060 bf->bf_comp = ath_tx_aggr_comp;
3063 * Update the current leak count if
3064 * we're leaking frames; and set the
3065 * MORE flag as appropriate.
3067 ath_tx_leak_count_update(sc, tid, bf);
3069 /* Hand off to hardware */
3070 ath_tx_handoff(sc, txq, bf);
3074 * Attempt to send the packet.
3075 * If the queue isn't busy, direct-dispatch.
3076 * If the queue is busy enough, queue the given packet on the
3077 * relevant software queue.
3080 ath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni,
3081 struct ath_txq *txq, int queue_to_head, struct ath_buf *bf)
3083 struct ath_node *an = ATH_NODE(ni);
3084 struct ieee80211_frame *wh;
3085 struct ath_tid *atid;
3087 struct mbuf *m0 = bf->bf_m;
3089 ATH_TX_LOCK_ASSERT(sc);
3091 /* Fetch the TID - non-QoS frames get assigned to TID 16 */
3092 wh = mtod(m0, struct ieee80211_frame *);
3093 pri = ath_tx_getac(sc, m0);
3094 tid = ath_tx_gettid(sc, m0);
3095 atid = &an->an_tid[tid];
3097 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p, pri=%d, tid=%d, qos=%d\n",
3098 __func__, bf, pri, tid, IEEE80211_QOS_HAS_SEQ(wh));
3100 /* Set local packet state, used to queue packets to hardware */
3101 /* XXX potentially duplicate info, re-check */
3102 bf->bf_state.bfs_tid = tid;
3103 bf->bf_state.bfs_tx_queue = txq->axq_qnum;
3104 bf->bf_state.bfs_pri = pri;
3107 * If the hardware queue isn't busy, queue it directly.
3108 * If the hardware queue is busy, queue it.
3109 * If the TID is paused or the traffic it outside BAW, software
3112 * If the node is in power-save and we're leaking a frame,
3113 * leak a single frame.
3115 if (! ath_tx_tid_can_tx_or_sched(sc, atid)) {
3116 /* TID is paused, queue */
3117 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: paused\n", __func__);
3119 * If the caller requested that it be sent at a high
3120 * priority, queue it at the head of the list.
3123 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
3125 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3126 } else if (ath_tx_ampdu_pending(sc, an, tid)) {
3127 /* AMPDU pending; queue */
3128 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: pending\n", __func__);
3129 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3131 } else if (ath_tx_ampdu_running(sc, an, tid)) {
3132 /* AMPDU running, attempt direct dispatch if possible */
3135 * Always queue the frame to the tail of the list.
3137 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3140 * If the hardware queue isn't busy, direct dispatch
3141 * the head frame in the list. Don't schedule the
3142 * TID - let it build some more frames first?
3144 * When running A-MPDU, always just check the hardware
3145 * queue depth against the aggregate frame limit.
3146 * We don't want to burst a large number of single frames
3147 * out to the hardware; we want to aggressively hold back.
3149 * Otherwise, schedule the TID.
3151 /* XXX TXQ locking */
3152 if (txq->axq_depth + txq->fifo.axq_depth < sc->sc_hwq_limit_aggr) {
3153 bf = ATH_TID_FIRST(atid);
3154 ATH_TID_REMOVE(atid, bf, bf_list);
3157 * Ensure it's definitely treated as a non-AMPDU
3158 * frame - this information may have been left
3159 * over from a previous attempt.
3161 bf->bf_state.bfs_aggr = 0;
3162 bf->bf_state.bfs_nframes = 1;
3164 /* Queue to the hardware */
3165 ath_tx_xmit_aggr(sc, an, txq, bf);
3166 DPRINTF(sc, ATH_DEBUG_SW_TX,
3170 DPRINTF(sc, ATH_DEBUG_SW_TX,
3171 "%s: ampdu; swq'ing\n",
3174 ath_tx_tid_sched(sc, atid);
3177 * If we're not doing A-MPDU, be prepared to direct dispatch
3178 * up to both limits if possible. This particular corner
3179 * case may end up with packet starvation between aggregate
3180 * traffic and non-aggregate traffic: we want to ensure
3181 * that non-aggregate stations get a few frames queued to the
3182 * hardware before the aggregate station(s) get their chance.
3184 * So if you only ever see a couple of frames direct dispatched
3185 * to the hardware from a non-AMPDU client, check both here
3186 * and in the software queue dispatcher to ensure that those
3187 * non-AMPDU stations get a fair chance to transmit.
3189 /* XXX TXQ locking */
3190 } else if ((txq->axq_depth + txq->fifo.axq_depth < sc->sc_hwq_limit_nonaggr) &&
3191 (txq->axq_aggr_depth < sc->sc_hwq_limit_aggr)) {
3192 /* AMPDU not running, attempt direct dispatch */
3193 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: xmit_normal\n", __func__);
3194 /* See if clrdmask needs to be set */
3195 ath_tx_update_clrdmask(sc, atid, bf);
3198 * Update the current leak count if
3199 * we're leaking frames; and set the
3200 * MORE flag as appropriate.
3202 ath_tx_leak_count_update(sc, atid, bf);
3205 * Dispatch the frame.
3207 ath_tx_xmit_normal(sc, txq, bf);
3210 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: swq'ing\n", __func__);
3211 ATH_TID_INSERT_TAIL(atid, bf, bf_list);
3212 ath_tx_tid_sched(sc, atid);
3217 * Only set the clrdmask bit if none of the nodes are currently
3220 * XXX TODO: go through all the callers and check to see
3221 * which are being called in the context of looping over all
3222 * TIDs (eg, if all tids are being paused, resumed, etc.)
3223 * That'll avoid O(n^2) complexity here.
3226 ath_tx_set_clrdmask(struct ath_softc *sc, struct ath_node *an)
3230 ATH_TX_LOCK_ASSERT(sc);
3232 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
3233 if (an->an_tid[i].isfiltered == 1)
3240 * Configure the per-TID node state.
3242 * This likely belongs in if_ath_node.c but I can't think of anywhere
3243 * else to put it just yet.
3245 * This sets up the SLISTs and the mutex as appropriate.
3248 ath_tx_tid_init(struct ath_softc *sc, struct ath_node *an)
3251 struct ath_tid *atid;
3253 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
3254 atid = &an->an_tid[i];
3256 /* XXX now with this bzer(), is the field 0'ing needed? */
3257 bzero(atid, sizeof(*atid));
3259 TAILQ_INIT(&atid->tid_q);
3260 TAILQ_INIT(&atid->filtq.tid_q);
3263 for (j = 0; j < ATH_TID_MAX_BUFS; j++)
3264 atid->tx_buf[j] = NULL;
3265 atid->baw_head = atid->baw_tail = 0;
3268 atid->hwq_depth = 0;
3269 atid->cleanup_inprogress = 0;
3270 if (i == IEEE80211_NONQOS_TID)
3271 atid->ac = ATH_NONQOS_TID_AC;
3273 atid->ac = TID_TO_WME_AC(i);
3275 an->clrdmask = 1; /* Always start by setting this bit */
3279 * Pause the current TID. This stops packets from being transmitted
3282 * Since this is also called from upper layers as well as the driver,
3283 * it will get the TID lock.
3286 ath_tx_tid_pause(struct ath_softc *sc, struct ath_tid *tid)
3289 ATH_TX_LOCK_ASSERT(sc);
3291 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: [%6D]: tid=%d, paused = %d\n",
3293 tid->an->an_node.ni_macaddr, ":",
3299 * Unpause the current TID, and schedule it if needed.
3302 ath_tx_tid_resume(struct ath_softc *sc, struct ath_tid *tid)
3304 ATH_TX_LOCK_ASSERT(sc);
3307 * There's some odd places where ath_tx_tid_resume() is called
3308 * when it shouldn't be; this works around that particular issue
3309 * until it's actually resolved.
3311 if (tid->paused == 0) {
3312 device_printf(sc->sc_dev,
3313 "%s: [%6D]: tid=%d, paused=0?\n",
3315 tid->an->an_node.ni_macaddr, ":",
3321 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
3322 "%s: [%6D]: tid=%d, unpaused = %d\n",
3324 tid->an->an_node.ni_macaddr, ":",
3332 * Override the clrdmask configuration for the next frame
3333 * from this TID, just to get the ball rolling.
3335 ath_tx_set_clrdmask(sc, tid->an);
3337 if (tid->axq_depth == 0)
3340 /* XXX isfiltered shouldn't ever be 0 at this point */
3341 if (tid->isfiltered == 1) {
3342 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: filtered?!\n",
3347 ath_tx_tid_sched(sc, tid);
3350 * Queue the software TX scheduler.
3352 ath_tx_swq_kick(sc);
3356 * Add the given ath_buf to the TID filtered frame list.
3357 * This requires the TID be filtered.
3360 ath_tx_tid_filt_addbuf(struct ath_softc *sc, struct ath_tid *tid,
3364 ATH_TX_LOCK_ASSERT(sc);
3366 if (!tid->isfiltered)
3367 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: not filtered?!\n",
3370 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: bf=%p\n", __func__, bf);
3372 /* Set the retry bit and bump the retry counter */
3373 ath_tx_set_retry(sc, bf);
3374 sc->sc_stats.ast_tx_swfiltered++;
3376 ATH_TID_FILT_INSERT_TAIL(tid, bf, bf_list);
3380 * Handle a completed filtered frame from the given TID.
3381 * This just enables/pauses the filtered frame state if required
3382 * and appends the filtered frame to the filtered queue.
3385 ath_tx_tid_filt_comp_buf(struct ath_softc *sc, struct ath_tid *tid,
3389 ATH_TX_LOCK_ASSERT(sc);
3391 if (! tid->isfiltered) {
3392 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: tid=%d; filter transition\n",
3393 __func__, tid->tid);
3394 tid->isfiltered = 1;
3395 ath_tx_tid_pause(sc, tid);
3398 /* Add the frame to the filter queue */
3399 ath_tx_tid_filt_addbuf(sc, tid, bf);
3403 * Complete the filtered frame TX completion.
3405 * If there are no more frames in the hardware queue, unpause/unfilter
3406 * the TID if applicable. Otherwise we will wait for a node PS transition
3410 ath_tx_tid_filt_comp_complete(struct ath_softc *sc, struct ath_tid *tid)
3415 ATH_TX_LOCK_ASSERT(sc);
3417 if (tid->hwq_depth != 0)
3420 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT, "%s: tid=%d, hwq=0, transition back\n",
3421 __func__, tid->tid);
3422 if (tid->isfiltered == 1) {
3423 tid->isfiltered = 0;
3427 /* XXX ath_tx_tid_resume() also calls ath_tx_set_clrdmask()! */
3428 ath_tx_set_clrdmask(sc, tid->an);
3430 /* XXX this is really quite inefficient */
3431 while ((bf = ATH_TID_FILT_LAST(tid, ath_bufhead_s)) != NULL) {
3432 ATH_TID_FILT_REMOVE(tid, bf, bf_list);
3433 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
3436 /* And only resume if we had paused before */
3438 ath_tx_tid_resume(sc, tid);
3442 * Called when a single (aggregate or otherwise) frame is completed.
3444 * Returns 0 if the buffer could be added to the filtered list
3445 * (cloned or otherwise), 1 if the buffer couldn't be added to the
3446 * filtered list (failed clone; expired retry) and the caller should
3447 * free it and handle it like a failure (eg by sending a BAR.)
3449 * since the buffer may be cloned, bf must be not touched after this
3450 * if the return value is 0.
3453 ath_tx_tid_filt_comp_single(struct ath_softc *sc, struct ath_tid *tid,
3456 struct ath_buf *nbf;
3459 ATH_TX_LOCK_ASSERT(sc);
3462 * Don't allow a filtered frame to live forever.
3464 if (bf->bf_state.bfs_retries > SWMAX_RETRIES) {
3465 sc->sc_stats.ast_tx_swretrymax++;
3466 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3467 "%s: bf=%p, seqno=%d, exceeded retries\n",
3470 SEQNO(bf->bf_state.bfs_seqno));
3471 retval = 1; /* error */
3476 * A busy buffer can't be added to the retry list.
3477 * It needs to be cloned.
3479 if (bf->bf_flags & ATH_BUF_BUSY) {
3480 nbf = ath_tx_retry_clone(sc, tid->an, tid, bf);
3481 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3482 "%s: busy buffer clone: %p -> %p\n",
3489 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3490 "%s: busy buffer couldn't be cloned (%p)!\n",
3492 retval = 1; /* error */
3494 ath_tx_tid_filt_comp_buf(sc, tid, nbf);
3495 retval = 0; /* ok */
3498 ath_tx_tid_filt_comp_complete(sc, tid);
3504 ath_tx_tid_filt_comp_aggr(struct ath_softc *sc, struct ath_tid *tid,
3505 struct ath_buf *bf_first, ath_bufhead *bf_q)
3507 struct ath_buf *bf, *bf_next, *nbf;
3509 ATH_TX_LOCK_ASSERT(sc);
3513 bf_next = bf->bf_next;
3514 bf->bf_next = NULL; /* Remove it from the aggr list */
3517 * Don't allow a filtered frame to live forever.
3519 if (bf->bf_state.bfs_retries > SWMAX_RETRIES) {
3520 sc->sc_stats.ast_tx_swretrymax++;
3521 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3522 "%s: tid=%d, bf=%p, seqno=%d, exceeded retries\n",
3526 SEQNO(bf->bf_state.bfs_seqno));
3527 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
3531 if (bf->bf_flags & ATH_BUF_BUSY) {
3532 nbf = ath_tx_retry_clone(sc, tid->an, tid, bf);
3533 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3534 "%s: tid=%d, busy buffer cloned: %p -> %p, seqno=%d\n",
3535 __func__, tid->tid, bf, nbf, SEQNO(bf->bf_state.bfs_seqno));
3541 * If the buffer couldn't be cloned, add it to bf_q;
3542 * the caller will free the buffer(s) as required.
3545 DPRINTF(sc, ATH_DEBUG_SW_TX_FILT,
3546 "%s: tid=%d, buffer couldn't be cloned! (%p) seqno=%d\n",
3547 __func__, tid->tid, bf, SEQNO(bf->bf_state.bfs_seqno));
3548 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
3550 ath_tx_tid_filt_comp_buf(sc, tid, nbf);
3556 ath_tx_tid_filt_comp_complete(sc, tid);
3560 * Suspend the queue because we need to TX a BAR.
3563 ath_tx_tid_bar_suspend(struct ath_softc *sc, struct ath_tid *tid)
3566 ATH_TX_LOCK_ASSERT(sc);
3568 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3569 "%s: tid=%d, bar_wait=%d, bar_tx=%d, called\n",
3575 /* We shouldn't be called when bar_tx is 1 */
3577 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3578 "%s: bar_tx is 1?!\n", __func__);
3581 /* If we've already been called, just be patient. */
3588 /* Only one pause, no matter how many frames fail */
3589 ath_tx_tid_pause(sc, tid);
3593 * We've finished with BAR handling - either we succeeded or
3594 * failed. Either way, unsuspend TX.
3597 ath_tx_tid_bar_unsuspend(struct ath_softc *sc, struct ath_tid *tid)
3600 ATH_TX_LOCK_ASSERT(sc);
3602 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3603 "%s: %6D: TID=%d, called\n",
3605 tid->an->an_node.ni_macaddr,
3609 if (tid->bar_tx == 0 || tid->bar_wait == 0) {
3610 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3611 "%s: %6D: TID=%d, bar_tx=%d, bar_wait=%d: ?\n",
3612 __func__, tid->an->an_node.ni_macaddr, ":",
3613 tid->tid, tid->bar_tx, tid->bar_wait);
3616 tid->bar_tx = tid->bar_wait = 0;
3617 ath_tx_tid_resume(sc, tid);
3621 * Return whether we're ready to TX a BAR frame.
3623 * Requires the TID lock be held.
3626 ath_tx_tid_bar_tx_ready(struct ath_softc *sc, struct ath_tid *tid)
3629 ATH_TX_LOCK_ASSERT(sc);
3631 if (tid->bar_wait == 0 || tid->hwq_depth > 0)
3634 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3635 "%s: %6D: TID=%d, bar ready\n",
3637 tid->an->an_node.ni_macaddr,
3645 * Check whether the current TID is ready to have a BAR
3646 * TXed and if so, do the TX.
3648 * Since the TID/TXQ lock can't be held during a call to
3649 * ieee80211_send_bar(), we have to do the dirty thing of unlocking it,
3650 * sending the BAR and locking it again.
3652 * Eventually, the code to send the BAR should be broken out
3653 * from this routine so the lock doesn't have to be reacquired
3654 * just to be immediately dropped by the caller.
3657 ath_tx_tid_bar_tx(struct ath_softc *sc, struct ath_tid *tid)
3659 struct ieee80211_tx_ampdu *tap;
3661 ATH_TX_LOCK_ASSERT(sc);
3663 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3664 "%s: %6D: TID=%d, called\n",
3666 tid->an->an_node.ni_macaddr,
3670 tap = ath_tx_get_tx_tid(tid->an, tid->tid);
3673 * This is an error condition!
3675 if (tid->bar_wait == 0 || tid->bar_tx == 1) {
3676 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3677 "%s: %6D: TID=%d, bar_tx=%d, bar_wait=%d: ?\n",
3678 __func__, tid->an->an_node.ni_macaddr, ":",
3679 tid->tid, tid->bar_tx, tid->bar_wait);
3683 /* Don't do anything if we still have pending frames */
3684 if (tid->hwq_depth > 0) {
3685 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3686 "%s: %6D: TID=%d, hwq_depth=%d, waiting\n",
3688 tid->an->an_node.ni_macaddr,
3695 /* We're now about to TX */
3699 * Override the clrdmask configuration for the next frame,
3700 * just to get the ball rolling.
3702 ath_tx_set_clrdmask(sc, tid->an);
3705 * Calculate new BAW left edge, now that all frames have either
3706 * succeeded or failed.
3708 * XXX verify this is _actually_ the valid value to begin at!
3710 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3711 "%s: %6D: TID=%d, new BAW left edge=%d\n",
3713 tid->an->an_node.ni_macaddr,
3718 /* Try sending the BAR frame */
3719 /* We can't hold the lock here! */
3722 if (ieee80211_send_bar(&tid->an->an_node, tap, tap->txa_start) == 0) {
3723 /* Success? Now we wait for notification that it's done */
3728 /* Failure? For now, warn loudly and continue */
3730 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
3731 "%s: %6D: TID=%d, failed to TX BAR, continue!\n",
3732 __func__, tid->an->an_node.ni_macaddr, ":",
3734 ath_tx_tid_bar_unsuspend(sc, tid);
3738 ath_tx_tid_drain_pkt(struct ath_softc *sc, struct ath_node *an,
3739 struct ath_tid *tid, ath_bufhead *bf_cq, struct ath_buf *bf)
3742 ATH_TX_LOCK_ASSERT(sc);
3745 * If the current TID is running AMPDU, update
3748 if (ath_tx_ampdu_running(sc, an, tid->tid) &&
3749 bf->bf_state.bfs_dobaw) {
3751 * Only remove the frame from the BAW if it's
3752 * been transmitted at least once; this means
3753 * the frame was in the BAW to begin with.
3755 if (bf->bf_state.bfs_retries > 0) {
3756 ath_tx_update_baw(sc, an, tid, bf);
3757 bf->bf_state.bfs_dobaw = 0;
3761 * This has become a non-fatal error now
3763 if (! bf->bf_state.bfs_addedbaw)
3764 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW
3765 "%s: wasn't added: seqno %d\n",
3766 __func__, SEQNO(bf->bf_state.bfs_seqno));
3770 /* Strip it out of an aggregate list if it was in one */
3773 /* Insert on the free queue to be freed by the caller */
3774 TAILQ_INSERT_TAIL(bf_cq, bf, bf_list);
3778 ath_tx_tid_drain_print(struct ath_softc *sc, struct ath_node *an,
3779 const char *pfx, struct ath_tid *tid, struct ath_buf *bf)
3781 struct ieee80211_node *ni = &an->an_node;
3782 struct ath_txq *txq;
3783 struct ieee80211_tx_ampdu *tap;
3785 txq = sc->sc_ac2q[tid->ac];
3786 tap = ath_tx_get_tx_tid(an, tid->tid);
3788 DPRINTF(sc, ATH_DEBUG_SW_TX | ATH_DEBUG_RESET,
3789 "%s: %s: %6D: bf=%p: addbaw=%d, dobaw=%d, "
3790 "seqno=%d, retry=%d\n",
3796 bf->bf_state.bfs_addedbaw,
3797 bf->bf_state.bfs_dobaw,
3798 SEQNO(bf->bf_state.bfs_seqno),
3799 bf->bf_state.bfs_retries);
3800 DPRINTF(sc, ATH_DEBUG_SW_TX | ATH_DEBUG_RESET,
3801 "%s: %s: %6D: bf=%p: txq[%d] axq_depth=%d, axq_aggr_depth=%d\n",
3809 txq->axq_aggr_depth);
3810 DPRINTF(sc, ATH_DEBUG_SW_TX | ATH_DEBUG_RESET,
3811 "%s: %s: %6D: bf=%p: tid txq_depth=%d hwq_depth=%d, bar_wait=%d, "
3822 DPRINTF(sc, ATH_DEBUG_SW_TX | ATH_DEBUG_RESET,
3823 "%s: %s: %6D: tid %d: "
3824 "sched=%d, paused=%d, "
3825 "incomp=%d, baw_head=%d, "
3826 "baw_tail=%d txa_start=%d, ni_txseqs=%d\n",
3832 tid->sched, tid->paused,
3833 tid->incomp, tid->baw_head,
3834 tid->baw_tail, tap == NULL ? -1 : tap->txa_start,
3835 ni->ni_txseqs[tid->tid]);
3837 /* XXX Dump the frame, see what it is? */
3838 if (IFF_DUMPPKTS(sc, ATH_DEBUG_XMIT))
3839 ieee80211_dump_pkt(ni->ni_ic,
3840 mtod(bf->bf_m, const uint8_t *),
3841 bf->bf_m->m_len, 0, -1);
3845 * Free any packets currently pending in the software TX queue.
3847 * This will be called when a node is being deleted.
3849 * It can also be called on an active node during an interface
3850 * reset or state transition.
3852 * (From Linux/reference):
3854 * TODO: For frame(s) that are in the retry state, we will reuse the
3855 * sequence number(s) without setting the retry bit. The
3856 * alternative is to give up on these and BAR the receiver's window
3860 ath_tx_tid_drain(struct ath_softc *sc, struct ath_node *an,
3861 struct ath_tid *tid, ath_bufhead *bf_cq)
3864 struct ieee80211_tx_ampdu *tap;
3865 struct ieee80211_node *ni = &an->an_node;
3868 tap = ath_tx_get_tx_tid(an, tid->tid);
3870 ATH_TX_LOCK_ASSERT(sc);
3872 /* Walk the queue, free frames */
3875 bf = ATH_TID_FIRST(tid);
3881 ath_tx_tid_drain_print(sc, an, "norm", tid, bf);
3885 ATH_TID_REMOVE(tid, bf, bf_list);
3886 ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf);
3889 /* And now, drain the filtered frame queue */
3892 bf = ATH_TID_FILT_FIRST(tid);
3897 ath_tx_tid_drain_print(sc, an, "filt", tid, bf);
3901 ATH_TID_FILT_REMOVE(tid, bf, bf_list);
3902 ath_tx_tid_drain_pkt(sc, an, tid, bf_cq, bf);
3906 * Override the clrdmask configuration for the next frame
3907 * in case there is some future transmission, just to get
3910 * This won't hurt things if the TID is about to be freed.
3912 ath_tx_set_clrdmask(sc, tid->an);
3915 * Now that it's completed, grab the TID lock and update
3916 * the sequence number and BAW window.
3917 * Because sequence numbers have been assigned to frames
3918 * that haven't been sent yet, it's entirely possible
3919 * we'll be called with some pending frames that have not
3922 * The cleaner solution is to do the sequence number allocation
3923 * when the packet is first transmitted - and thus the "retries"
3924 * check above would be enough to update the BAW/seqno.
3927 /* But don't do it for non-QoS TIDs */
3930 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
3931 "%s: %6D: node %p: TID %d: sliding BAW left edge to %d\n",
3939 ni->ni_txseqs[tid->tid] = tap->txa_start;
3940 tid->baw_tail = tid->baw_head;
3945 * Reset the TID state. This must be only called once the node has
3946 * had its frames flushed from this TID, to ensure that no other
3947 * pause / unpause logic can kick in.
3950 ath_tx_tid_reset(struct ath_softc *sc, struct ath_tid *tid)
3954 tid->bar_wait = tid->bar_tx = tid->isfiltered = 0;
3955 tid->paused = tid->sched = tid->addba_tx_pending = 0;
3956 tid->incomp = tid->cleanup_inprogress = 0;
3960 * If we have a bar_wait set, we need to unpause the TID
3961 * here. Otherwise once cleanup has finished, the TID won't
3962 * have the right paused counter.
3964 * XXX I'm not going through resume here - I don't want the
3965 * node to be rescheuled just yet. This however should be
3968 if (tid->bar_wait) {
3969 if (tid->paused > 0) {
3975 * XXX same with a currently filtered TID.
3977 * Since this is being called during a flush, we assume that
3978 * the filtered frame list is actually empty.
3980 * XXX TODO: add in a check to ensure that the filtered queue
3981 * depth is actually 0!
3983 if (tid->isfiltered) {
3984 if (tid->paused > 0) {
3990 * Clear BAR, filtered frames, scheduled and ADDBA pending.
3991 * The TID may be going through cleanup from the last association
3992 * where things in the BAW are still in the hardware queue.
3996 tid->isfiltered = 0;
3998 tid->addba_tx_pending = 0;
4001 * XXX TODO: it may just be enough to walk the HWQs and mark
4002 * frames for that node as non-aggregate; or mark the ath_node
4003 * with something that indicates that aggregation is no longer
4004 * occurring. Then we can just toss the BAW complaints and
4005 * do a complete hard reset of state here - no pause, no
4006 * complete counter, etc.
4012 * Flush all software queued packets for the given node.
4014 * This occurs when a completion handler frees the last buffer
4015 * for a node, and the node is thus freed. This causes the node
4016 * to be cleaned up, which ends up calling ath_tx_node_flush.
4019 ath_tx_node_flush(struct ath_softc *sc, struct ath_node *an)
4027 ATH_KTR(sc, ATH_KTR_NODE, 1, "ath_tx_node_flush: flush node; ni=%p",
4031 DPRINTF(sc, ATH_DEBUG_NODE,
4032 "%s: %6D: flush; is_powersave=%d, stack_psq=%d, tim=%d, "
4033 "swq_depth=%d, clrdmask=%d, leak_count=%d\n",
4035 an->an_node.ni_macaddr,
4037 an->an_is_powersave,
4044 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
4045 struct ath_tid *atid = &an->an_tid[tid];
4048 ath_tx_tid_drain(sc, an, atid, &bf_cq);
4050 /* Remove this tid from the list of active tids */
4051 ath_tx_tid_unsched(sc, atid);
4053 /* Reset the per-TID pause, BAR, etc state */
4054 ath_tx_tid_reset(sc, atid);
4058 * Clear global leak count
4060 an->an_leak_count = 0;
4063 /* Handle completed frames */
4064 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4065 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4066 ath_tx_default_comp(sc, bf, 0);
4071 * Drain all the software TXQs currently with traffic queued.
4074 ath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq)
4076 struct ath_tid *tid;
4084 * Iterate over all active tids for the given txq,
4085 * flushing and unsched'ing them
4087 while (! TAILQ_EMPTY(&txq->axq_tidq)) {
4088 tid = TAILQ_FIRST(&txq->axq_tidq);
4089 ath_tx_tid_drain(sc, tid->an, tid, &bf_cq);
4090 ath_tx_tid_unsched(sc, tid);
4095 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4096 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4097 ath_tx_default_comp(sc, bf, 0);
4102 * Handle completion of non-aggregate session frames.
4104 * This (currently) doesn't implement software retransmission of
4105 * non-aggregate frames!
4107 * Software retransmission of non-aggregate frames needs to obey
4108 * the strict sequence number ordering, and drop any frames that
4111 * For now, filtered frames and frame transmission will cause
4112 * all kinds of issues. So we don't support them.
4114 * So anyone queuing frames via ath_tx_normal_xmit() or
4115 * ath_tx_hw_queue_norm() must override and set CLRDMASK.
4118 ath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf, int fail)
4120 struct ieee80211_node *ni = bf->bf_node;
4121 struct ath_node *an = ATH_NODE(ni);
4122 int tid = bf->bf_state.bfs_tid;
4123 struct ath_tid *atid = &an->an_tid[tid];
4124 struct ath_tx_status *ts = &bf->bf_status.ds_txstat;
4126 /* The TID state is protected behind the TXQ lock */
4129 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bf=%p: fail=%d, hwq_depth now %d\n",
4130 __func__, bf, fail, atid->hwq_depth - 1);
4136 * If the frame was filtered, stick it on the filter frame
4137 * queue and complain about it. It shouldn't happen!
4139 if ((ts->ts_status & HAL_TXERR_FILT) ||
4140 (ts->ts_status != 0 && atid->isfiltered)) {
4141 DPRINTF(sc, ATH_DEBUG_SW_TX,
4142 "%s: isfiltered=%d, ts_status=%d: huh?\n",
4146 ath_tx_tid_filt_comp_buf(sc, atid, bf);
4149 if (atid->isfiltered)
4150 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: filtered?!\n", __func__);
4151 if (atid->hwq_depth < 0)
4152 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: hwq_depth < 0: %d\n",
4153 __func__, atid->hwq_depth);
4155 /* If the TID is being cleaned up, track things */
4157 if (atid->cleanup_inprogress) {
4159 if (atid->incomp == 0) {
4160 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4161 "%s: TID %d: cleaned up! resume!\n",
4163 atid->cleanup_inprogress = 0;
4164 ath_tx_tid_resume(sc, atid);
4169 * If the queue is filtered, potentially mark it as complete
4170 * and reschedule it as needed.
4172 * This is required as there may be a subsequent TX descriptor
4173 * for this end-node that has CLRDMASK set, so it's quite possible
4174 * that a filtered frame will be followed by a non-filtered
4175 * (complete or otherwise) frame.
4177 * XXX should we do this before we complete the frame?
4179 if (atid->isfiltered)
4180 ath_tx_tid_filt_comp_complete(sc, atid);
4184 * punt to rate control if we're not being cleaned up
4185 * during a hw queue drain and the frame wanted an ACK.
4187 if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0))
4188 ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc,
4189 ts, bf->bf_state.bfs_pktlen,
4190 1, (ts->ts_status == 0) ? 0 : 1);
4192 ath_tx_default_comp(sc, bf, fail);
4196 * Handle cleanup of aggregate session packets that aren't
4199 * There's no need to update the BAW here - the session is being
4203 ath_tx_comp_cleanup_unaggr(struct ath_softc *sc, struct ath_buf *bf)
4205 struct ieee80211_node *ni = bf->bf_node;
4206 struct ath_node *an = ATH_NODE(ni);
4207 int tid = bf->bf_state.bfs_tid;
4208 struct ath_tid *atid = &an->an_tid[tid];
4210 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: TID %d: incomp=%d\n",
4211 __func__, tid, atid->incomp);
4217 if (bf->bf_state.bfs_dobaw) {
4218 ath_tx_update_baw(sc, an, atid, bf);
4219 if (!bf->bf_state.bfs_addedbaw)
4220 DPRINTF(sc, ATH_DEBUG_SW_TX,
4221 "%s: wasn't added: seqno %d\n",
4222 __func__, SEQNO(bf->bf_state.bfs_seqno));
4225 if (atid->incomp == 0) {
4226 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4227 "%s: TID %d: cleaned up! resume!\n",
4229 atid->cleanup_inprogress = 0;
4230 ath_tx_tid_resume(sc, atid);
4234 ath_tx_default_comp(sc, bf, 0);
4239 * This as it currently stands is a bit dumb. Ideally we'd just
4240 * fail the frame the normal way and have it permanently fail
4241 * via the normal aggregate completion path.
4244 ath_tx_tid_cleanup_frame(struct ath_softc *sc, struct ath_node *an,
4245 int tid, struct ath_buf *bf_head, ath_bufhead *bf_cq)
4247 struct ath_tid *atid = &an->an_tid[tid];
4248 struct ath_buf *bf, *bf_next;
4250 ATH_TX_LOCK_ASSERT(sc);
4253 * Remove this frame from the queue.
4255 ATH_TID_REMOVE(atid, bf_head, bf_list);
4258 * Loop over all the frames in the aggregate.
4261 while (bf != NULL) {
4262 bf_next = bf->bf_next; /* next aggregate frame, or NULL */
4265 * If it's been added to the BAW we need to kick
4266 * it out of the BAW before we continue.
4268 * XXX if it's an aggregate, assert that it's in the
4269 * BAW - we shouldn't have it be in an aggregate
4272 if (bf->bf_state.bfs_addedbaw) {
4273 ath_tx_update_baw(sc, an, atid, bf);
4274 bf->bf_state.bfs_dobaw = 0;
4278 * Give it the default completion handler.
4280 bf->bf_comp = ath_tx_normal_comp;
4284 * Add it to the list to free.
4286 TAILQ_INSERT_TAIL(bf_cq, bf, bf_list);
4289 * Now advance to the next frame in the aggregate.
4296 * Performs transmit side cleanup when TID changes from aggregated to
4297 * unaggregated and during reassociation.
4299 * For now, this just tosses everything from the TID software queue
4300 * whether or not it has been retried and marks the TID as
4301 * pending completion if there's anything for this TID queued to
4304 * The caller is responsible for pausing the TID and unpausing the
4305 * TID if no cleanup was required. Otherwise the cleanup path will
4306 * unpause the TID once the last hardware queued frame is completed.
4309 ath_tx_tid_cleanup(struct ath_softc *sc, struct ath_node *an, int tid,
4312 struct ath_tid *atid = &an->an_tid[tid];
4313 struct ath_buf *bf, *bf_next;
4315 ATH_TX_LOCK_ASSERT(sc);
4317 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4318 "%s: TID %d: called; inprogress=%d\n", __func__, tid,
4319 atid->cleanup_inprogress);
4322 * Move the filtered frames to the TX queue, before
4323 * we run off and discard/process things.
4326 /* XXX this is really quite inefficient */
4327 while ((bf = ATH_TID_FILT_LAST(atid, ath_bufhead_s)) != NULL) {
4328 ATH_TID_FILT_REMOVE(atid, bf, bf_list);
4329 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4333 * Update the frames in the software TX queue:
4335 * + Discard retry frames in the queue
4336 * + Fix the completion function to be non-aggregate
4338 bf = ATH_TID_FIRST(atid);
4341 * Grab the next frame in the list, we may
4342 * be fiddling with the list.
4344 bf_next = TAILQ_NEXT(bf, bf_list);
4347 * Free the frame and all subframes.
4349 ath_tx_tid_cleanup_frame(sc, an, tid, bf, bf_cq);
4358 * If there's anything in the hardware queue we wait
4359 * for the TID HWQ to empty.
4361 if (atid->hwq_depth > 0) {
4363 * XXX how about we kill atid->incomp, and instead
4364 * replace it with a macro that checks that atid->hwq_depth
4367 atid->incomp = atid->hwq_depth;
4368 atid->cleanup_inprogress = 1;
4371 if (atid->cleanup_inprogress)
4372 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4373 "%s: TID %d: cleanup needed: %d packets\n",
4374 __func__, tid, atid->incomp);
4376 /* Owner now must free completed frames */
4379 static struct ath_buf *
4380 ath_tx_retry_clone(struct ath_softc *sc, struct ath_node *an,
4381 struct ath_tid *tid, struct ath_buf *bf)
4383 struct ath_buf *nbf;
4387 * Clone the buffer. This will handle the dma unmap and
4388 * copy the node reference to the new buffer. If this
4389 * works out, 'bf' will have no DMA mapping, no mbuf
4390 * pointer and no node reference.
4392 nbf = ath_buf_clone(sc, bf);
4395 DPRINTF(sc, ATH_DEBUG_XMIT, "%s: ATH_BUF_BUSY; cloning\n",
4400 /* Failed to clone */
4401 DPRINTF(sc, ATH_DEBUG_XMIT,
4402 "%s: failed to clone a busy buffer\n",
4407 /* Setup the dma for the new buffer */
4408 error = ath_tx_dmasetup(sc, nbf, nbf->bf_m);
4410 DPRINTF(sc, ATH_DEBUG_XMIT,
4411 "%s: failed to setup dma for clone\n",
4414 * Put this at the head of the list, not tail;
4415 * that way it doesn't interfere with the
4416 * busy buffer logic (which uses the tail of
4420 ath_returnbuf_head(sc, nbf);
4421 ATH_TXBUF_UNLOCK(sc);
4425 /* Update BAW if required, before we free the original buf */
4426 if (bf->bf_state.bfs_dobaw)
4427 ath_tx_switch_baw_buf(sc, an, tid, bf, nbf);
4429 /* Free original buffer; return new buffer */
4430 ath_freebuf(sc, bf);
4436 * Handle retrying an unaggregate frame in an aggregate
4439 * If too many retries occur, pause the TID, wait for
4440 * any further retransmits (as there's no reason why
4441 * non-aggregate frames in an aggregate session are
4442 * transmitted in-order; they just have to be in-BAW)
4443 * and then queue a BAR.
4446 ath_tx_aggr_retry_unaggr(struct ath_softc *sc, struct ath_buf *bf)
4448 struct ieee80211_node *ni = bf->bf_node;
4449 struct ath_node *an = ATH_NODE(ni);
4450 int tid = bf->bf_state.bfs_tid;
4451 struct ath_tid *atid = &an->an_tid[tid];
4452 struct ieee80211_tx_ampdu *tap;
4456 tap = ath_tx_get_tx_tid(an, tid);
4459 * If the buffer is marked as busy, we can't directly
4460 * reuse it. Instead, try to clone the buffer.
4461 * If the clone is successful, recycle the old buffer.
4462 * If the clone is unsuccessful, set bfs_retries to max
4463 * to force the next bit of code to free the buffer
4466 if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) &&
4467 (bf->bf_flags & ATH_BUF_BUSY)) {
4468 struct ath_buf *nbf;
4469 nbf = ath_tx_retry_clone(sc, an, atid, bf);
4471 /* bf has been freed at this point */
4474 bf->bf_state.bfs_retries = SWMAX_RETRIES + 1;
4477 if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) {
4478 DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES,
4479 "%s: exceeded retries; seqno %d\n",
4480 __func__, SEQNO(bf->bf_state.bfs_seqno));
4481 sc->sc_stats.ast_tx_swretrymax++;
4483 /* Update BAW anyway */
4484 if (bf->bf_state.bfs_dobaw) {
4485 ath_tx_update_baw(sc, an, atid, bf);
4486 if (! bf->bf_state.bfs_addedbaw)
4487 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4488 "%s: wasn't added: seqno %d\n",
4489 __func__, SEQNO(bf->bf_state.bfs_seqno));
4491 bf->bf_state.bfs_dobaw = 0;
4493 /* Suspend the TX queue and get ready to send the BAR */
4494 ath_tx_tid_bar_suspend(sc, atid);
4496 /* Send the BAR if there are no other frames waiting */
4497 if (ath_tx_tid_bar_tx_ready(sc, atid))
4498 ath_tx_tid_bar_tx(sc, atid);
4502 /* Free buffer, bf is free after this call */
4503 ath_tx_default_comp(sc, bf, 0);
4508 * This increments the retry counter as well as
4509 * sets the retry flag in the ath_buf and packet
4512 ath_tx_set_retry(sc, bf);
4513 sc->sc_stats.ast_tx_swretries++;
4516 * Insert this at the head of the queue, so it's
4517 * retried before any current/subsequent frames.
4519 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
4520 ath_tx_tid_sched(sc, atid);
4521 /* Send the BAR if there are no other frames waiting */
4522 if (ath_tx_tid_bar_tx_ready(sc, atid))
4523 ath_tx_tid_bar_tx(sc, atid);
4529 * Common code for aggregate excessive retry/subframe retry.
4530 * If retrying, queues buffers to bf_q. If not, frees the
4533 * XXX should unify this with ath_tx_aggr_retry_unaggr()
4536 ath_tx_retry_subframe(struct ath_softc *sc, struct ath_buf *bf,
4539 struct ieee80211_node *ni = bf->bf_node;
4540 struct ath_node *an = ATH_NODE(ni);
4541 int tid = bf->bf_state.bfs_tid;
4542 struct ath_tid *atid = &an->an_tid[tid];
4544 ATH_TX_LOCK_ASSERT(sc);
4546 /* XXX clr11naggr should be done for all subframes */
4547 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
4548 ath_hal_set11nburstduration(sc->sc_ah, bf->bf_desc, 0);
4550 /* ath_hal_set11n_virtualmorefrag(sc->sc_ah, bf->bf_desc, 0); */
4553 * If the buffer is marked as busy, we can't directly
4554 * reuse it. Instead, try to clone the buffer.
4555 * If the clone is successful, recycle the old buffer.
4556 * If the clone is unsuccessful, set bfs_retries to max
4557 * to force the next bit of code to free the buffer
4560 if ((bf->bf_state.bfs_retries < SWMAX_RETRIES) &&
4561 (bf->bf_flags & ATH_BUF_BUSY)) {
4562 struct ath_buf *nbf;
4563 nbf = ath_tx_retry_clone(sc, an, atid, bf);
4565 /* bf has been freed at this point */
4568 bf->bf_state.bfs_retries = SWMAX_RETRIES + 1;
4571 if (bf->bf_state.bfs_retries >= SWMAX_RETRIES) {
4572 sc->sc_stats.ast_tx_swretrymax++;
4573 DPRINTF(sc, ATH_DEBUG_SW_TX_RETRIES,
4574 "%s: max retries: seqno %d\n",
4575 __func__, SEQNO(bf->bf_state.bfs_seqno));
4576 ath_tx_update_baw(sc, an, atid, bf);
4577 if (!bf->bf_state.bfs_addedbaw)
4578 DPRINTF(sc, ATH_DEBUG_SW_TX_BAW,
4579 "%s: wasn't added: seqno %d\n",
4580 __func__, SEQNO(bf->bf_state.bfs_seqno));
4581 bf->bf_state.bfs_dobaw = 0;
4585 ath_tx_set_retry(sc, bf);
4586 sc->sc_stats.ast_tx_swretries++;
4587 bf->bf_next = NULL; /* Just to make sure */
4589 /* Clear the aggregate state */
4590 bf->bf_state.bfs_aggr = 0;
4591 bf->bf_state.bfs_ndelim = 0; /* ??? needed? */
4592 bf->bf_state.bfs_nframes = 1;
4594 TAILQ_INSERT_TAIL(bf_q, bf, bf_list);
4599 * error pkt completion for an aggregate destination
4602 ath_tx_comp_aggr_error(struct ath_softc *sc, struct ath_buf *bf_first,
4603 struct ath_tid *tid)
4605 struct ieee80211_node *ni = bf_first->bf_node;
4606 struct ath_node *an = ATH_NODE(ni);
4607 struct ath_buf *bf_next, *bf;
4610 struct ieee80211_tx_ampdu *tap;
4617 * Update rate control - all frames have failed.
4619 * XXX use the length in the first frame in the series;
4620 * XXX just so things are consistent for now.
4622 ath_tx_update_ratectrl(sc, ni, bf_first->bf_state.bfs_rc,
4623 &bf_first->bf_status.ds_txstat,
4624 bf_first->bf_state.bfs_pktlen,
4625 bf_first->bf_state.bfs_nframes, bf_first->bf_state.bfs_nframes);
4628 tap = ath_tx_get_tx_tid(an, tid->tid);
4629 sc->sc_stats.ast_tx_aggr_failall++;
4631 /* Retry all subframes */
4634 bf_next = bf->bf_next;
4635 bf->bf_next = NULL; /* Remove it from the aggr list */
4636 sc->sc_stats.ast_tx_aggr_fail++;
4637 if (ath_tx_retry_subframe(sc, bf, &bf_q)) {
4640 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4645 /* Prepend all frames to the beginning of the queue */
4646 while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) {
4647 TAILQ_REMOVE(&bf_q, bf, bf_list);
4648 ATH_TID_INSERT_HEAD(tid, bf, bf_list);
4652 * Schedule the TID to be re-tried.
4654 ath_tx_tid_sched(sc, tid);
4657 * send bar if we dropped any frames
4659 * Keep the txq lock held for now, as we need to ensure
4660 * that ni_txseqs[] is consistent (as it's being updated
4661 * in the ifnet TX context or raw TX context.)
4664 /* Suspend the TX queue and get ready to send the BAR */
4665 ath_tx_tid_bar_suspend(sc, tid);
4669 * Send BAR if required
4671 if (ath_tx_tid_bar_tx_ready(sc, tid))
4672 ath_tx_tid_bar_tx(sc, tid);
4676 /* Complete frames which errored out */
4677 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
4678 TAILQ_REMOVE(&bf_cq, bf, bf_list);
4679 ath_tx_default_comp(sc, bf, 0);
4684 * Handle clean-up of packets from an aggregate list.
4686 * There's no need to update the BAW here - the session is being
4690 ath_tx_comp_cleanup_aggr(struct ath_softc *sc, struct ath_buf *bf_first)
4692 struct ath_buf *bf, *bf_next;
4693 struct ieee80211_node *ni = bf_first->bf_node;
4694 struct ath_node *an = ATH_NODE(ni);
4695 int tid = bf_first->bf_state.bfs_tid;
4696 struct ath_tid *atid = &an->an_tid[tid];
4703 /* Update the BAW */
4707 if (bf->bf_state.bfs_dobaw) {
4708 ath_tx_update_baw(sc, an, atid, bf);
4709 if (!bf->bf_state.bfs_addedbaw)
4710 DPRINTF(sc, ATH_DEBUG_SW_TX,
4711 "%s: wasn't added: seqno %d\n",
4712 __func__, SEQNO(bf->bf_state.bfs_seqno));
4717 if (atid->incomp == 0) {
4718 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
4719 "%s: TID %d: cleaned up! resume!\n",
4721 atid->cleanup_inprogress = 0;
4722 ath_tx_tid_resume(sc, atid);
4725 /* Send BAR if required */
4726 /* XXX why would we send a BAR when transitioning to non-aggregation? */
4728 * XXX TODO: we should likely just tear down the BAR state here,
4729 * rather than sending a BAR.
4731 if (ath_tx_tid_bar_tx_ready(sc, atid))
4732 ath_tx_tid_bar_tx(sc, atid);
4736 /* Handle frame completion as individual frames */
4739 bf_next = bf->bf_next;
4741 ath_tx_default_comp(sc, bf, 1);
4747 * Handle completion of an set of aggregate frames.
4749 * Note: the completion handler is the last descriptor in the aggregate,
4750 * not the last descriptor in the first frame.
4753 ath_tx_aggr_comp_aggr(struct ath_softc *sc, struct ath_buf *bf_first,
4756 //struct ath_desc *ds = bf->bf_lastds;
4757 struct ieee80211_node *ni = bf_first->bf_node;
4758 struct ath_node *an = ATH_NODE(ni);
4759 int tid = bf_first->bf_state.bfs_tid;
4760 struct ath_tid *atid = &an->an_tid[tid];
4761 struct ath_tx_status ts;
4762 struct ieee80211_tx_ampdu *tap;
4768 struct ath_buf *bf, *bf_next;
4771 int nframes = 0, nbad = 0, nf;
4773 /* XXX there's too much on the stack? */
4774 struct ath_rc_series rc[ATH_RC_NUM];
4777 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: called; hwq_depth=%d\n",
4778 __func__, atid->hwq_depth);
4781 * Take a copy; this may be needed -after- bf_first
4782 * has been completed and freed.
4784 ts = bf_first->bf_status.ds_txstat;
4789 /* The TID state is kept behind the TXQ lock */
4793 if (atid->hwq_depth < 0)
4794 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: hwq_depth < 0: %d\n",
4795 __func__, atid->hwq_depth);
4798 * If the TID is filtered, handle completing the filter
4799 * transition before potentially kicking it to the cleanup
4802 * XXX this is duplicate work, ew.
4804 if (atid->isfiltered)
4805 ath_tx_tid_filt_comp_complete(sc, atid);
4808 * Punt cleanup to the relevant function, not our problem now
4810 if (atid->cleanup_inprogress) {
4811 if (atid->isfiltered)
4812 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4813 "%s: isfiltered=1, normal_comp?\n",
4816 ath_tx_comp_cleanup_aggr(sc, bf_first);
4821 * If the frame is filtered, transition to filtered frame
4822 * mode and add this to the filtered frame list.
4824 * XXX TODO: figure out how this interoperates with
4825 * BAR, pause and cleanup states.
4827 if ((ts.ts_status & HAL_TXERR_FILT) ||
4828 (ts.ts_status != 0 && atid->isfiltered)) {
4830 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4831 "%s: isfiltered=1, fail=%d\n", __func__, fail);
4832 ath_tx_tid_filt_comp_aggr(sc, atid, bf_first, &bf_cq);
4834 /* Remove from BAW */
4835 TAILQ_FOREACH_SAFE(bf, &bf_cq, bf_list, bf_next) {
4836 if (bf->bf_state.bfs_addedbaw)
4838 if (bf->bf_state.bfs_dobaw) {
4839 ath_tx_update_baw(sc, an, atid, bf);
4840 if (!bf->bf_state.bfs_addedbaw)
4841 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4842 "%s: wasn't added: seqno %d\n",
4844 SEQNO(bf->bf_state.bfs_seqno));
4846 bf->bf_state.bfs_dobaw = 0;
4849 * If any intermediate frames in the BAW were dropped when
4850 * handling filtering things, send a BAR.
4853 ath_tx_tid_bar_suspend(sc, atid);
4856 * Finish up by sending a BAR if required and freeing
4857 * the frames outside of the TX lock.
4859 goto finish_send_bar;
4863 * XXX for now, use the first frame in the aggregate for
4864 * XXX rate control completion; it's at least consistent.
4866 pktlen = bf_first->bf_state.bfs_pktlen;
4869 * Handle errors first!
4871 * Here, handle _any_ error as a "exceeded retries" error.
4872 * Later on (when filtered frames are to be specially handled)
4873 * it'll have to be expanded.
4876 if (ts.ts_status & HAL_TXERR_XRETRY) {
4878 if (ts.ts_status != 0) {
4880 ath_tx_comp_aggr_error(sc, bf_first, atid);
4884 tap = ath_tx_get_tx_tid(an, tid);
4887 * extract starting sequence and block-ack bitmap
4889 /* XXX endian-ness of seq_st, ba? */
4890 seq_st = ts.ts_seqnum;
4891 hasba = !! (ts.ts_flags & HAL_TX_BA);
4892 tx_ok = (ts.ts_status == 0);
4893 isaggr = bf_first->bf_state.bfs_aggr;
4894 ba[0] = ts.ts_ba_low;
4895 ba[1] = ts.ts_ba_high;
4898 * Copy the TX completion status and the rate control
4899 * series from the first descriptor, as it may be freed
4900 * before the rate control code can get its grubby fingers
4903 memcpy(rc, bf_first->bf_state.bfs_rc, sizeof(rc));
4905 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4906 "%s: txa_start=%d, tx_ok=%d, status=%.8x, flags=%.8x, "
4907 "isaggr=%d, seq_st=%d, hasba=%d, ba=%.8x, %.8x\n",
4908 __func__, tap->txa_start, tx_ok, ts.ts_status, ts.ts_flags,
4909 isaggr, seq_st, hasba, ba[0], ba[1]);
4912 * The reference driver doesn't do this; it simply ignores
4913 * this check in its entirety.
4915 * I've seen this occur when using iperf to send traffic
4916 * out tid 1 - the aggregate frames are all marked as TID 1,
4917 * but the TXSTATUS has TID=0. So, let's just ignore this
4921 /* Occasionally, the MAC sends a tx status for the wrong TID. */
4922 if (tid != ts.ts_tid) {
4923 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR, "%s: tid %d != hw tid %d\n",
4924 __func__, tid, ts.ts_tid);
4929 /* AR5416 BA bug; this requires an interface reset */
4930 if (isaggr && tx_ok && (! hasba)) {
4931 device_printf(sc->sc_dev,
4932 "%s: AR5416 bug: hasba=%d; txok=%d, isaggr=%d, "
4934 __func__, hasba, tx_ok, isaggr, seq_st);
4935 /* XXX TODO: schedule an interface reset */
4937 ath_printtxbuf(sc, bf_first,
4938 sc->sc_ac2q[atid->ac]->axq_qnum, 0, 0);
4943 * Walk the list of frames, figure out which ones were correctly
4944 * sent and which weren't.
4947 nf = bf_first->bf_state.bfs_nframes;
4949 /* bf_first is going to be invalid once this list is walked */
4953 * Walk the list of completed frames and determine
4954 * which need to be completed and which need to be
4957 * For completed frames, the completion functions need
4958 * to be called at the end of this function as the last
4959 * node reference may free the node.
4961 * Finally, since the TXQ lock can't be held during the
4962 * completion callback (to avoid lock recursion),
4963 * the completion calls have to be done outside of the
4968 ba_index = ATH_BA_INDEX(seq_st,
4969 SEQNO(bf->bf_state.bfs_seqno));
4970 bf_next = bf->bf_next;
4971 bf->bf_next = NULL; /* Remove it from the aggr list */
4973 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4974 "%s: checking bf=%p seqno=%d; ack=%d\n",
4975 __func__, bf, SEQNO(bf->bf_state.bfs_seqno),
4976 ATH_BA_ISSET(ba, ba_index));
4978 if (tx_ok && ATH_BA_ISSET(ba, ba_index)) {
4979 sc->sc_stats.ast_tx_aggr_ok++;
4980 ath_tx_update_baw(sc, an, atid, bf);
4981 bf->bf_state.bfs_dobaw = 0;
4982 if (!bf->bf_state.bfs_addedbaw)
4983 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
4984 "%s: wasn't added: seqno %d\n",
4985 __func__, SEQNO(bf->bf_state.bfs_seqno));
4987 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
4989 sc->sc_stats.ast_tx_aggr_fail++;
4990 if (ath_tx_retry_subframe(sc, bf, &bf_q)) {
4993 TAILQ_INSERT_TAIL(&bf_cq, bf, bf_list);
5001 * Now that the BAW updates have been done, unlock
5003 * txseq is grabbed before the lock is released so we
5004 * have a consistent view of what -was- in the BAW.
5005 * Anything after this point will not yet have been
5008 txseq = tap->txa_start;
5012 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5013 "%s: num frames seen=%d; bf nframes=%d\n",
5014 __func__, nframes, nf);
5017 * Now we know how many frames were bad, call the rate
5021 ath_tx_update_ratectrl(sc, ni, rc, &ts, pktlen, nframes,
5025 * send bar if we dropped any frames
5028 /* Suspend the TX queue and get ready to send the BAR */
5030 ath_tx_tid_bar_suspend(sc, atid);
5034 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5035 "%s: txa_start now %d\n", __func__, tap->txa_start);
5039 /* Prepend all frames to the beginning of the queue */
5040 while ((bf = TAILQ_LAST(&bf_q, ath_bufhead_s)) != NULL) {
5041 TAILQ_REMOVE(&bf_q, bf, bf_list);
5042 ATH_TID_INSERT_HEAD(atid, bf, bf_list);
5046 * Reschedule to grab some further frames.
5048 ath_tx_tid_sched(sc, atid);
5051 * If the queue is filtered, re-schedule as required.
5053 * This is required as there may be a subsequent TX descriptor
5054 * for this end-node that has CLRDMASK set, so it's quite possible
5055 * that a filtered frame will be followed by a non-filtered
5056 * (complete or otherwise) frame.
5058 * XXX should we do this before we complete the frame?
5060 if (atid->isfiltered)
5061 ath_tx_tid_filt_comp_complete(sc, atid);
5066 * Send BAR if required
5068 if (ath_tx_tid_bar_tx_ready(sc, atid))
5069 ath_tx_tid_bar_tx(sc, atid);
5073 /* Do deferred completion */
5074 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
5075 TAILQ_REMOVE(&bf_cq, bf, bf_list);
5076 ath_tx_default_comp(sc, bf, 0);
5081 * Handle completion of unaggregated frames in an ADDBA
5084 * Fail is set to 1 if the entry is being freed via a call to
5085 * ath_tx_draintxq().
5088 ath_tx_aggr_comp_unaggr(struct ath_softc *sc, struct ath_buf *bf, int fail)
5090 struct ieee80211_node *ni = bf->bf_node;
5091 struct ath_node *an = ATH_NODE(ni);
5092 int tid = bf->bf_state.bfs_tid;
5093 struct ath_tid *atid = &an->an_tid[tid];
5094 struct ath_tx_status ts;
5098 * Take a copy of this; filtering/cloning the frame may free the
5101 ts = bf->bf_status.ds_txstat;
5104 * Update rate control status here, before we possibly
5105 * punt to retry or cleanup.
5107 * Do it outside of the TXQ lock.
5109 if (fail == 0 && ((bf->bf_state.bfs_txflags & HAL_TXDESC_NOACK) == 0))
5110 ath_tx_update_ratectrl(sc, ni, bf->bf_state.bfs_rc,
5111 &bf->bf_status.ds_txstat,
5112 bf->bf_state.bfs_pktlen,
5113 1, (ts.ts_status == 0) ? 0 : 1);
5116 * This is called early so atid->hwq_depth can be tracked.
5117 * This unfortunately means that it's released and regrabbed
5118 * during retry and cleanup. That's rather inefficient.
5122 if (tid == IEEE80211_NONQOS_TID)
5123 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=16!\n", __func__);
5125 DPRINTF(sc, ATH_DEBUG_SW_TX,
5126 "%s: bf=%p: tid=%d, hwq_depth=%d, seqno=%d\n",
5127 __func__, bf, bf->bf_state.bfs_tid, atid->hwq_depth,
5128 SEQNO(bf->bf_state.bfs_seqno));
5131 if (atid->hwq_depth < 0)
5132 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: hwq_depth < 0: %d\n",
5133 __func__, atid->hwq_depth);
5136 * If the TID is filtered, handle completing the filter
5137 * transition before potentially kicking it to the cleanup
5140 if (atid->isfiltered)
5141 ath_tx_tid_filt_comp_complete(sc, atid);
5144 * If a cleanup is in progress, punt to comp_cleanup;
5145 * rather than handling it here. It's thus their
5146 * responsibility to clean up, call the completion
5147 * function in net80211, etc.
5149 if (atid->cleanup_inprogress) {
5150 if (atid->isfiltered)
5151 DPRINTF(sc, ATH_DEBUG_SW_TX,
5152 "%s: isfiltered=1, normal_comp?\n",
5155 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: cleanup_unaggr\n",
5157 ath_tx_comp_cleanup_unaggr(sc, bf);
5162 * XXX TODO: how does cleanup, BAR and filtered frame handling
5165 * If the frame is filtered OR if it's any failure but
5166 * the TID is filtered, the frame must be added to the
5167 * filtered frame list.
5169 * However - a busy buffer can't be added to the filtered
5170 * list as it will end up being recycled without having
5171 * been made available for the hardware.
5173 if ((ts.ts_status & HAL_TXERR_FILT) ||
5174 (ts.ts_status != 0 && atid->isfiltered)) {
5178 DPRINTF(sc, ATH_DEBUG_SW_TX,
5179 "%s: isfiltered=1, fail=%d\n",
5181 freeframe = ath_tx_tid_filt_comp_single(sc, atid, bf);
5183 * If freeframe=0 then bf is no longer ours; don't
5187 /* Remove from BAW */
5188 if (bf->bf_state.bfs_addedbaw)
5190 if (bf->bf_state.bfs_dobaw) {
5191 ath_tx_update_baw(sc, an, atid, bf);
5192 if (!bf->bf_state.bfs_addedbaw)
5193 DPRINTF(sc, ATH_DEBUG_SW_TX,
5194 "%s: wasn't added: seqno %d\n",
5195 __func__, SEQNO(bf->bf_state.bfs_seqno));
5197 bf->bf_state.bfs_dobaw = 0;
5201 * If the frame couldn't be filtered, treat it as a drop and
5202 * prepare to send a BAR.
5204 if (freeframe && drops)
5205 ath_tx_tid_bar_suspend(sc, atid);
5208 * Send BAR if required
5210 if (ath_tx_tid_bar_tx_ready(sc, atid))
5211 ath_tx_tid_bar_tx(sc, atid);
5215 * If freeframe is set, then the frame couldn't be
5216 * cloned and bf is still valid. Just complete/free it.
5219 ath_tx_default_comp(sc, bf, fail);
5224 * Don't bother with the retry check if all frames
5225 * are being failed (eg during queue deletion.)
5228 if (fail == 0 && ts->ts_status & HAL_TXERR_XRETRY) {
5230 if (fail == 0 && ts.ts_status != 0) {
5232 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: retry_unaggr\n",
5234 ath_tx_aggr_retry_unaggr(sc, bf);
5238 /* Success? Complete */
5239 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=%d, seqno %d\n",
5240 __func__, tid, SEQNO(bf->bf_state.bfs_seqno));
5241 if (bf->bf_state.bfs_dobaw) {
5242 ath_tx_update_baw(sc, an, atid, bf);
5243 bf->bf_state.bfs_dobaw = 0;
5244 if (!bf->bf_state.bfs_addedbaw)
5245 DPRINTF(sc, ATH_DEBUG_SW_TX,
5246 "%s: wasn't added: seqno %d\n",
5247 __func__, SEQNO(bf->bf_state.bfs_seqno));
5251 * If the queue is filtered, re-schedule as required.
5253 * This is required as there may be a subsequent TX descriptor
5254 * for this end-node that has CLRDMASK set, so it's quite possible
5255 * that a filtered frame will be followed by a non-filtered
5256 * (complete or otherwise) frame.
5258 * XXX should we do this before we complete the frame?
5260 if (atid->isfiltered)
5261 ath_tx_tid_filt_comp_complete(sc, atid);
5264 * Send BAR if required
5266 if (ath_tx_tid_bar_tx_ready(sc, atid))
5267 ath_tx_tid_bar_tx(sc, atid);
5271 ath_tx_default_comp(sc, bf, fail);
5272 /* bf is freed at this point */
5276 ath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf, int fail)
5278 if (bf->bf_state.bfs_aggr)
5279 ath_tx_aggr_comp_aggr(sc, bf, fail);
5281 ath_tx_aggr_comp_unaggr(sc, bf, fail);
5285 * Schedule some packets from the given node/TID to the hardware.
5287 * This is the aggregate version.
5290 ath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an,
5291 struct ath_tid *tid)
5294 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
5295 struct ieee80211_tx_ampdu *tap;
5296 ATH_AGGR_STATUS status;
5299 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d\n", __func__, tid->tid);
5300 ATH_TX_LOCK_ASSERT(sc);
5303 * XXX TODO: If we're called for a queue that we're leaking frames to,
5304 * ensure we only leak one.
5307 tap = ath_tx_get_tx_tid(an, tid->tid);
5309 if (tid->tid == IEEE80211_NONQOS_TID)
5310 DPRINTF(sc, ATH_DEBUG_SW_TX,
5311 "%s: called for TID=NONQOS_TID?\n", __func__);
5314 status = ATH_AGGR_DONE;
5317 * If the upper layer has paused the TID, don't
5318 * queue any further packets.
5320 * This can also occur from the completion task because
5321 * of packet loss; but as its serialised with this code,
5322 * it won't "appear" half way through queuing packets.
5324 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
5327 bf = ATH_TID_FIRST(tid);
5333 * If the packet doesn't fall within the BAW (eg a NULL
5334 * data frame), schedule it directly; continue.
5336 if (! bf->bf_state.bfs_dobaw) {
5337 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5338 "%s: non-baw packet\n",
5340 ATH_TID_REMOVE(tid, bf, bf_list);
5342 if (bf->bf_state.bfs_nframes > 1)
5343 DPRINTF(sc, ATH_DEBUG_SW_TX,
5344 "%s: aggr=%d, nframes=%d\n",
5346 bf->bf_state.bfs_aggr,
5347 bf->bf_state.bfs_nframes);
5350 * This shouldn't happen - such frames shouldn't
5351 * ever have been queued as an aggregate in the
5352 * first place. However, make sure the fields
5353 * are correctly setup just to be totally sure.
5355 bf->bf_state.bfs_aggr = 0;
5356 bf->bf_state.bfs_nframes = 1;
5358 /* Update CLRDMASK just before this frame is queued */
5359 ath_tx_update_clrdmask(sc, tid, bf);
5361 ath_tx_do_ratelookup(sc, bf);
5362 ath_tx_calc_duration(sc, bf);
5363 ath_tx_calc_protection(sc, bf);
5364 ath_tx_set_rtscts(sc, bf);
5365 ath_tx_rate_fill_rcflags(sc, bf);
5366 ath_tx_setds(sc, bf);
5367 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
5369 sc->sc_aggr_stats.aggr_nonbaw_pkt++;
5371 /* Queue the packet; continue */
5378 * Do a rate control lookup on the first frame in the
5379 * list. The rate control code needs that to occur
5380 * before it can determine whether to TX.
5381 * It's inaccurate because the rate control code doesn't
5382 * really "do" aggregate lookups, so it only considers
5383 * the size of the first frame.
5385 ath_tx_do_ratelookup(sc, bf);
5386 bf->bf_state.bfs_rc[3].rix = 0;
5387 bf->bf_state.bfs_rc[3].tries = 0;
5389 ath_tx_calc_duration(sc, bf);
5390 ath_tx_calc_protection(sc, bf);
5392 ath_tx_set_rtscts(sc, bf);
5393 ath_tx_rate_fill_rcflags(sc, bf);
5395 status = ath_tx_form_aggr(sc, an, tid, &bf_q);
5397 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5398 "%s: ath_tx_form_aggr() status=%d\n", __func__, status);
5401 * No frames to be picked up - out of BAW
5403 if (TAILQ_EMPTY(&bf_q))
5407 * This assumes that the descriptor list in the ath_bufhead
5408 * are already linked together via bf_next pointers.
5410 bf = TAILQ_FIRST(&bf_q);
5412 if (status == ATH_AGGR_8K_LIMITED)
5413 sc->sc_aggr_stats.aggr_rts_aggr_limited++;
5416 * If it's the only frame send as non-aggregate
5417 * assume that ath_tx_form_aggr() has checked
5418 * whether it's in the BAW and added it appropriately.
5420 if (bf->bf_state.bfs_nframes == 1) {
5421 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5422 "%s: single-frame aggregate\n", __func__);
5424 /* Update CLRDMASK just before this frame is queued */
5425 ath_tx_update_clrdmask(sc, tid, bf);
5427 bf->bf_state.bfs_aggr = 0;
5428 bf->bf_state.bfs_ndelim = 0;
5429 ath_tx_setds(sc, bf);
5430 ath_hal_clr11n_aggr(sc->sc_ah, bf->bf_desc);
5431 if (status == ATH_AGGR_BAW_CLOSED)
5432 sc->sc_aggr_stats.aggr_baw_closed_single_pkt++;
5434 sc->sc_aggr_stats.aggr_single_pkt++;
5436 DPRINTF(sc, ATH_DEBUG_SW_TX_AGGR,
5437 "%s: multi-frame aggregate: %d frames, "
5439 __func__, bf->bf_state.bfs_nframes,
5440 bf->bf_state.bfs_al);
5441 bf->bf_state.bfs_aggr = 1;
5442 sc->sc_aggr_stats.aggr_pkts[bf->bf_state.bfs_nframes]++;
5443 sc->sc_aggr_stats.aggr_aggr_pkt++;
5445 /* Update CLRDMASK just before this frame is queued */
5446 ath_tx_update_clrdmask(sc, tid, bf);
5449 * Calculate the duration/protection as required.
5451 ath_tx_calc_duration(sc, bf);
5452 ath_tx_calc_protection(sc, bf);
5455 * Update the rate and rtscts information based on the
5456 * rate decision made by the rate control code;
5457 * the first frame in the aggregate needs it.
5459 ath_tx_set_rtscts(sc, bf);
5462 * Setup the relevant descriptor fields
5463 * for aggregation. The first descriptor
5464 * already points to the rest in the chain.
5466 ath_tx_setds_11n(sc, bf);
5470 /* Set completion handler, multi-frame aggregate or not */
5471 bf->bf_comp = ath_tx_aggr_comp;
5473 if (bf->bf_state.bfs_tid == IEEE80211_NONQOS_TID)
5474 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: TID=16?\n", __func__);
5477 * Update leak count and frame config if were leaking frames.
5479 * XXX TODO: it should update all frames in an aggregate
5482 ath_tx_leak_count_update(sc, tid, bf);
5485 ath_tx_handoff(sc, txq, bf);
5487 /* Track outstanding buffer count to hardware */
5488 /* aggregates are "one" buffer */
5492 * Break out if ath_tx_form_aggr() indicated
5493 * there can't be any further progress (eg BAW is full.)
5494 * Checking for an empty txq is done above.
5496 * XXX locking on txq here?
5498 /* XXX TXQ locking */
5499 if (txq->axq_aggr_depth >= sc->sc_hwq_limit_aggr ||
5500 (status == ATH_AGGR_BAW_CLOSED ||
5501 status == ATH_AGGR_LEAK_CLOSED))
5507 * Schedule some packets from the given node/TID to the hardware.
5509 * XXX TODO: this routine doesn't enforce the maximum TXQ depth.
5510 * It just dumps frames into the TXQ. We should limit how deep
5511 * the transmit queue can grow for frames dispatched to the given
5514 * To avoid locking issues, either we need to own the TXQ lock
5515 * at this point, or we need to pass in the maximum frame count
5519 ath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an,
5520 struct ath_tid *tid)
5523 struct ath_txq *txq = sc->sc_ac2q[tid->ac];
5525 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: node %p: TID %d: called\n",
5526 __func__, an, tid->tid);
5528 ATH_TX_LOCK_ASSERT(sc);
5530 /* Check - is AMPDU pending or running? then print out something */
5531 if (ath_tx_ampdu_pending(sc, an, tid->tid))
5532 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ampdu pending?\n",
5533 __func__, tid->tid);
5534 if (ath_tx_ampdu_running(sc, an, tid->tid))
5535 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, ampdu running?\n",
5536 __func__, tid->tid);
5541 * If the upper layers have paused the TID, don't
5542 * queue any further packets.
5544 * XXX if we are leaking frames, make sure we decrement
5545 * that counter _and_ we continue here.
5547 if (! ath_tx_tid_can_tx_or_sched(sc, tid))
5550 bf = ATH_TID_FIRST(tid);
5555 ATH_TID_REMOVE(tid, bf, bf_list);
5558 if (tid->tid != bf->bf_state.bfs_tid) {
5559 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: bfs_tid %d !="
5560 " tid %d\n", __func__, bf->bf_state.bfs_tid,
5563 /* Normal completion handler */
5564 bf->bf_comp = ath_tx_normal_comp;
5567 * Override this for now, until the non-aggregate
5568 * completion handler correctly handles software retransmits.
5570 bf->bf_state.bfs_txflags |= HAL_TXDESC_CLRDMASK;
5572 /* Update CLRDMASK just before this frame is queued */
5573 ath_tx_update_clrdmask(sc, tid, bf);
5575 /* Program descriptors + rate control */
5576 ath_tx_do_ratelookup(sc, bf);
5577 ath_tx_calc_duration(sc, bf);
5578 ath_tx_calc_protection(sc, bf);
5579 ath_tx_set_rtscts(sc, bf);
5580 ath_tx_rate_fill_rcflags(sc, bf);
5581 ath_tx_setds(sc, bf);
5584 * Update the current leak count if
5585 * we're leaking frames; and set the
5586 * MORE flag as appropriate.
5588 ath_tx_leak_count_update(sc, tid, bf);
5590 /* Track outstanding buffer count to hardware */
5591 /* aggregates are "one" buffer */
5594 /* Punt to hardware or software txq */
5595 ath_tx_handoff(sc, txq, bf);
5600 * Schedule some packets to the given hardware queue.
5602 * This function walks the list of TIDs (ie, ath_node TIDs
5603 * with queued traffic) and attempts to schedule traffic
5606 * TID scheduling is implemented as a FIFO, with TIDs being
5607 * added to the end of the queue after some frames have been
5611 ath_txq_sched(struct ath_softc *sc, struct ath_txq *txq)
5613 struct ath_tid *tid, *next, *last;
5615 ATH_TX_LOCK_ASSERT(sc);
5618 * Don't schedule if the hardware queue is busy.
5619 * This (hopefully) gives some more time to aggregate
5620 * some packets in the aggregation queue.
5622 * XXX It doesn't stop a parallel sender from sneaking
5623 * in transmitting a frame!
5625 /* XXX TXQ locking */
5626 if (txq->axq_aggr_depth + txq->fifo.axq_depth >= sc->sc_hwq_limit_aggr) {
5627 sc->sc_aggr_stats.aggr_sched_nopkt++;
5630 if (txq->axq_depth >= sc->sc_hwq_limit_nonaggr) {
5631 sc->sc_aggr_stats.aggr_sched_nopkt++;
5635 last = TAILQ_LAST(&txq->axq_tidq, axq_t_s);
5637 TAILQ_FOREACH_SAFE(tid, &txq->axq_tidq, axq_qelem, next) {
5639 * Suspend paused queues here; they'll be resumed
5640 * once the addba completes or times out.
5642 DPRINTF(sc, ATH_DEBUG_SW_TX, "%s: tid=%d, paused=%d\n",
5643 __func__, tid->tid, tid->paused);
5644 ath_tx_tid_unsched(sc, tid);
5646 * This node may be in power-save and we're leaking
5647 * a frame; be careful.
5649 if (! ath_tx_tid_can_tx_or_sched(sc, tid)) {
5652 if (ath_tx_ampdu_running(sc, tid->an, tid->tid))
5653 ath_tx_tid_hw_queue_aggr(sc, tid->an, tid);
5655 ath_tx_tid_hw_queue_norm(sc, tid->an, tid);
5657 /* Not empty? Re-schedule */
5658 if (tid->axq_depth != 0)
5659 ath_tx_tid_sched(sc, tid);
5662 * Give the software queue time to aggregate more
5663 * packets. If we aren't running aggregation then
5664 * we should still limit the hardware queue depth.
5666 /* XXX TXQ locking */
5667 if (txq->axq_aggr_depth + txq->fifo.axq_depth >= sc->sc_hwq_limit_aggr) {
5670 if (txq->axq_depth >= sc->sc_hwq_limit_nonaggr) {
5675 * If this was the last entry on the original list, stop.
5676 * Otherwise nodes that have been rescheduled onto the end
5677 * of the TID FIFO list will just keep being rescheduled.
5679 * XXX What should we do about nodes that were paused
5680 * but are pending a leaking frame in response to a ps-poll?
5681 * They'll be put at the front of the list; so they'll
5682 * prematurely trigger this condition! Ew.
5694 * Return net80211 TID struct pointer, or NULL for none
5696 struct ieee80211_tx_ampdu *
5697 ath_tx_get_tx_tid(struct ath_node *an, int tid)
5699 struct ieee80211_node *ni = &an->an_node;
5700 struct ieee80211_tx_ampdu *tap;
5702 if (tid == IEEE80211_NONQOS_TID)
5705 tap = &ni->ni_tx_ampdu[tid];
5710 * Is AMPDU-TX running?
5713 ath_tx_ampdu_running(struct ath_softc *sc, struct ath_node *an, int tid)
5715 struct ieee80211_tx_ampdu *tap;
5717 if (tid == IEEE80211_NONQOS_TID)
5720 tap = ath_tx_get_tx_tid(an, tid);
5722 return 0; /* Not valid; default to not running */
5724 return !! (tap->txa_flags & IEEE80211_AGGR_RUNNING);
5728 * Is AMPDU-TX negotiation pending?
5731 ath_tx_ampdu_pending(struct ath_softc *sc, struct ath_node *an, int tid)
5733 struct ieee80211_tx_ampdu *tap;
5735 if (tid == IEEE80211_NONQOS_TID)
5738 tap = ath_tx_get_tx_tid(an, tid);
5740 return 0; /* Not valid; default to not pending */
5742 return !! (tap->txa_flags & IEEE80211_AGGR_XCHGPEND);
5746 * Is AMPDU-TX pending for the given TID?
5751 * Method to handle sending an ADDBA request.
5753 * We tap this so the relevant flags can be set to pause the TID
5754 * whilst waiting for the response.
5756 * XXX there's no timeout handler we can override?
5759 ath_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5760 int dialogtoken, int baparamset, int batimeout)
5762 struct ath_softc *sc = ni->ni_ic->ic_softc;
5763 int tid = tap->txa_tid;
5764 struct ath_node *an = ATH_NODE(ni);
5765 struct ath_tid *atid = &an->an_tid[tid];
5768 * XXX danger Will Robinson!
5770 * Although the taskqueue may be running and scheduling some more
5771 * packets, these should all be _before_ the addba sequence number.
5772 * However, net80211 will keep self-assigning sequence numbers
5773 * until addba has been negotiated.
5775 * In the past, these packets would be "paused" (which still works
5776 * fine, as they're being scheduled to the driver in the same
5777 * serialised method which is calling the addba request routine)
5778 * and when the aggregation session begins, they'll be dequeued
5779 * as aggregate packets and added to the BAW. However, now there's
5780 * a "bf->bf_state.bfs_dobaw" flag, and this isn't set for these
5781 * packets. Thus they never get included in the BAW tracking and
5782 * this can cause the initial burst of packets after the addba
5783 * negotiation to "hang", as they quickly fall outside the BAW.
5785 * The "eventual" solution should be to tag these packets with
5786 * dobaw. Although net80211 has given us a sequence number,
5787 * it'll be "after" the left edge of the BAW and thus it'll
5792 * This is a bit annoying. Until net80211 HT code inherits some
5793 * (any) locking, we may have this called in parallel BUT only
5794 * one response/timeout will be called. Grr.
5796 if (atid->addba_tx_pending == 0) {
5797 ath_tx_tid_pause(sc, atid);
5798 atid->addba_tx_pending = 1;
5802 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5803 "%s: %6D: called; dialogtoken=%d, baparamset=%d, batimeout=%d\n",
5807 dialogtoken, baparamset, batimeout);
5808 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5809 "%s: txa_start=%d, ni_txseqs=%d\n",
5810 __func__, tap->txa_start, ni->ni_txseqs[tid]);
5812 return sc->sc_addba_request(ni, tap, dialogtoken, baparamset,
5817 * Handle an ADDBA response.
5819 * We unpause the queue so TX'ing can resume.
5821 * Any packets TX'ed from this point should be "aggregate" (whether
5822 * aggregate or not) so the BAW is updated.
5824 * Note! net80211 keeps self-assigning sequence numbers until
5825 * ampdu is negotiated. This means the initially-negotiated BAW left
5826 * edge won't match the ni->ni_txseq.
5828 * So, being very dirty, the BAW left edge is "slid" here to match
5831 * What likely SHOULD happen is that all packets subsequent to the
5832 * addba request should be tagged as aggregate and queued as non-aggregate
5833 * frames; thus updating the BAW. For now though, I'll just slide the
5837 ath_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
5838 int status, int code, int batimeout)
5840 struct ath_softc *sc = ni->ni_ic->ic_softc;
5841 int tid = tap->txa_tid;
5842 struct ath_node *an = ATH_NODE(ni);
5843 struct ath_tid *atid = &an->an_tid[tid];
5846 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5847 "%s: %6D: called; status=%d, code=%d, batimeout=%d\n", __func__,
5850 status, code, batimeout);
5852 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
5853 "%s: txa_start=%d, ni_txseqs=%d\n",
5854 __func__, tap->txa_start, ni->ni_txseqs[tid]);
5857 * Call this first, so the interface flags get updated
5858 * before the TID is unpaused. Otherwise a race condition
5859 * exists where the unpaused TID still doesn't yet have
5860 * IEEE80211_AGGR_RUNNING set.
5862 r = sc->sc_addba_response(ni, tap, status, code, batimeout);
5865 atid->addba_tx_pending = 0;
5868 * Slide the BAW left edge to wherever net80211 left it for us.
5869 * Read above for more information.
5871 tap->txa_start = ni->ni_txseqs[tid];
5872 ath_tx_tid_resume(sc, atid);
5879 * Stop ADDBA on a queue.
5881 * This can be called whilst BAR TX is currently active on the queue,
5882 * so make sure this is unblocked before continuing.
5885 ath_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
5887 struct ath_softc *sc = ni->ni_ic->ic_softc;
5888 int tid = tap->txa_tid;
5889 struct ath_node *an = ATH_NODE(ni);
5890 struct ath_tid *atid = &an->an_tid[tid];
5894 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL, "%s: %6D: called\n",
5900 * Pause TID traffic early, so there aren't any races
5901 * Unblock the pending BAR held traffic, if it's currently paused.
5904 ath_tx_tid_pause(sc, atid);
5905 if (atid->bar_wait) {
5907 * bar_unsuspend() expects bar_tx == 1, as it should be
5908 * called from the TX completion path. This quietens
5909 * the warning. It's cleared for us anyway.
5912 ath_tx_tid_bar_unsuspend(sc, atid);
5916 /* There's no need to hold the TXQ lock here */
5917 sc->sc_addba_stop(ni, tap);
5920 * ath_tx_tid_cleanup will resume the TID if possible, otherwise
5921 * it'll set the cleanup flag, and it'll be unpaused once
5922 * things have been cleaned up.
5928 * In case there's a followup call to this, only call it
5929 * if we don't have a cleanup in progress.
5931 * Since we've paused the queue above, we need to make
5932 * sure we unpause if there's already a cleanup in
5933 * progress - it means something else is also doing
5934 * this stuff, so we don't need to also keep it paused.
5936 if (atid->cleanup_inprogress) {
5937 ath_tx_tid_resume(sc, atid);
5939 ath_tx_tid_cleanup(sc, an, tid, &bf_cq);
5941 * Unpause the TID if no cleanup is required.
5943 if (! atid->cleanup_inprogress)
5944 ath_tx_tid_resume(sc, atid);
5948 /* Handle completing frames and fail them */
5949 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
5950 TAILQ_REMOVE(&bf_cq, bf, bf_list);
5951 ath_tx_default_comp(sc, bf, 1);
5957 * Handle a node reassociation.
5959 * We may have a bunch of frames queued to the hardware; those need
5960 * to be marked as cleanup.
5963 ath_tx_node_reassoc(struct ath_softc *sc, struct ath_node *an)
5965 struct ath_tid *tid;
5972 ATH_TX_UNLOCK_ASSERT(sc);
5975 for (i = 0; i < IEEE80211_TID_SIZE; i++) {
5976 tid = &an->an_tid[i];
5977 if (tid->hwq_depth == 0)
5979 DPRINTF(sc, ATH_DEBUG_NODE,
5980 "%s: %6D: TID %d: cleaning up TID\n",
5982 an->an_node.ni_macaddr,
5986 * In case there's a followup call to this, only call it
5987 * if we don't have a cleanup in progress.
5989 if (! tid->cleanup_inprogress) {
5990 ath_tx_tid_pause(sc, tid);
5991 ath_tx_tid_cleanup(sc, an, i, &bf_cq);
5993 * Unpause the TID if no cleanup is required.
5995 if (! tid->cleanup_inprogress)
5996 ath_tx_tid_resume(sc, tid);
6001 /* Handle completing frames and fail them */
6002 while ((bf = TAILQ_FIRST(&bf_cq)) != NULL) {
6003 TAILQ_REMOVE(&bf_cq, bf, bf_list);
6004 ath_tx_default_comp(sc, bf, 1);
6009 * Note: net80211 bar_timeout() doesn't call this function on BAR failure;
6010 * it simply tears down the aggregation session. Ew.
6012 * It however will call ieee80211_ampdu_stop() which will call
6013 * ic->ic_addba_stop().
6015 * XXX This uses a hard-coded max BAR count value; the whole
6016 * XXX BAR TX success or failure should be better handled!
6019 ath_bar_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
6022 struct ath_softc *sc = ni->ni_ic->ic_softc;
6023 int tid = tap->txa_tid;
6024 struct ath_node *an = ATH_NODE(ni);
6025 struct ath_tid *atid = &an->an_tid[tid];
6026 int attempts = tap->txa_attempts;
6029 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
6030 "%s: %6D: called; txa_tid=%d, atid->tid=%d, status=%d, attempts=%d, txa_start=%d, txa_seqpending=%d\n",
6039 tap->txa_seqpending);
6041 /* Note: This may update the BAW details */
6043 * XXX What if this does slide the BAW along? We need to somehow
6044 * XXX either fix things when it does happen, or prevent the
6045 * XXX seqpending value to be anything other than exactly what
6046 * XXX the hell we want!
6048 * XXX So for now, how I do this inside the TX lock for now
6049 * XXX and just correct it afterwards? The below condition should
6050 * XXX never happen and if it does I need to fix all kinds of things.
6053 old_txa_start = tap->txa_start;
6054 sc->sc_bar_response(ni, tap, status);
6055 if (tap->txa_start != old_txa_start) {
6056 device_printf(sc->sc_dev, "%s: tid=%d; txa_start=%d, old=%d, adjusting\n",
6062 tap->txa_start = old_txa_start;
6065 /* Unpause the TID */
6067 * XXX if this is attempt=50, the TID will be downgraded
6068 * XXX to a non-aggregate session. So we must unpause the
6069 * XXX TID here or it'll never be done.
6071 * Also, don't call it if bar_tx/bar_wait are 0; something
6072 * has beaten us to the punch? (XXX figure out what?)
6074 if (status == 0 || attempts == 50) {
6076 if (atid->bar_tx == 0 || atid->bar_wait == 0)
6077 DPRINTF(sc, ATH_DEBUG_SW_TX_BAR,
6078 "%s: huh? bar_tx=%d, bar_wait=%d\n",
6080 atid->bar_tx, atid->bar_wait);
6082 ath_tx_tid_bar_unsuspend(sc, atid);
6088 * This is called whenever the pending ADDBA request times out.
6089 * Unpause and reschedule the TID.
6092 ath_addba_response_timeout(struct ieee80211_node *ni,
6093 struct ieee80211_tx_ampdu *tap)
6095 struct ath_softc *sc = ni->ni_ic->ic_softc;
6096 int tid = tap->txa_tid;
6097 struct ath_node *an = ATH_NODE(ni);
6098 struct ath_tid *atid = &an->an_tid[tid];
6100 DPRINTF(sc, ATH_DEBUG_SW_TX_CTRL,
6101 "%s: %6D: TID=%d, called; resuming\n",
6108 atid->addba_tx_pending = 0;
6111 /* Note: This updates the aggregate state to (again) pending */
6112 sc->sc_addba_response_timeout(ni, tap);
6114 /* Unpause the TID; which reschedules it */
6116 ath_tx_tid_resume(sc, atid);
6121 * Check if a node is asleep or not.
6124 ath_tx_node_is_asleep(struct ath_softc *sc, struct ath_node *an)
6127 ATH_TX_LOCK_ASSERT(sc);
6129 return (an->an_is_powersave);
6133 * Mark a node as currently "in powersaving."
6134 * This suspends all traffic on the node.
6136 * This must be called with the node/tx locks free.
6138 * XXX TODO: the locking silliness below is due to how the node
6139 * locking currently works. Right now, the node lock is grabbed
6140 * to do rate control lookups and these are done with the TX
6141 * queue lock held. This means the node lock can't be grabbed
6142 * first here or a LOR will occur.
6144 * Eventually (hopefully!) the TX path code will only grab
6145 * the TXQ lock when transmitting and the ath_node lock when
6146 * doing node/TID operations. There are other complications -
6147 * the sched/unsched operations involve walking the per-txq
6148 * 'active tid' list and this requires both locks to be held.
6151 ath_tx_node_sleep(struct ath_softc *sc, struct ath_node *an)
6153 struct ath_tid *atid;
6154 struct ath_txq *txq;
6157 ATH_TX_UNLOCK_ASSERT(sc);
6159 /* Suspend all traffic on the node */
6162 if (an->an_is_powersave) {
6163 DPRINTF(sc, ATH_DEBUG_XMIT,
6164 "%s: %6D: node was already asleep!\n",
6165 __func__, an->an_node.ni_macaddr, ":");
6170 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
6171 atid = &an->an_tid[tid];
6172 txq = sc->sc_ac2q[atid->ac];
6174 ath_tx_tid_pause(sc, atid);
6177 /* Mark node as in powersaving */
6178 an->an_is_powersave = 1;
6184 * Mark a node as currently "awake."
6185 * This resumes all traffic to the node.
6188 ath_tx_node_wakeup(struct ath_softc *sc, struct ath_node *an)
6190 struct ath_tid *atid;
6191 struct ath_txq *txq;
6194 ATH_TX_UNLOCK_ASSERT(sc);
6199 if (an->an_is_powersave == 0) {
6201 DPRINTF(sc, ATH_DEBUG_XMIT,
6202 "%s: an=%p: node was already awake\n",
6207 /* Mark node as awake */
6208 an->an_is_powersave = 0;
6210 * Clear any pending leaked frame requests
6212 an->an_leak_count = 0;
6214 for (tid = 0; tid < IEEE80211_TID_SIZE; tid++) {
6215 atid = &an->an_tid[tid];
6216 txq = sc->sc_ac2q[atid->ac];
6218 ath_tx_tid_resume(sc, atid);
6224 ath_legacy_dma_txsetup(struct ath_softc *sc)
6227 /* nothing new needed */
6232 ath_legacy_dma_txteardown(struct ath_softc *sc)
6235 /* nothing new needed */
6240 ath_xmit_setup_legacy(struct ath_softc *sc)
6243 * For now, just set the descriptor length to sizeof(ath_desc);
6244 * worry about extracting the real length out of the HAL later.
6246 sc->sc_tx_desclen = sizeof(struct ath_desc);
6247 sc->sc_tx_statuslen = sizeof(struct ath_desc);
6248 sc->sc_tx_nmaps = 1; /* only one buffer per TX desc */
6250 sc->sc_tx.xmit_setup = ath_legacy_dma_txsetup;
6251 sc->sc_tx.xmit_teardown = ath_legacy_dma_txteardown;
6252 sc->sc_tx.xmit_attach_comp_func = ath_legacy_attach_comp_func;
6254 sc->sc_tx.xmit_dma_restart = ath_legacy_tx_dma_restart;
6255 sc->sc_tx.xmit_handoff = ath_legacy_xmit_handoff;
6257 sc->sc_tx.xmit_drain = ath_legacy_tx_drain;