diff options
Diffstat (limited to 'qemu/roms/ipxe/src/drivers/net/ath/ath9k/ath9k_xmit.c')
| -rw-r--r-- | qemu/roms/ipxe/src/drivers/net/ath/ath9k/ath9k_xmit.c | 813 |
1 files changed, 0 insertions, 813 deletions
diff --git a/qemu/roms/ipxe/src/drivers/net/ath/ath9k/ath9k_xmit.c b/qemu/roms/ipxe/src/drivers/net/ath/ath9k/ath9k_xmit.c deleted file mode 100644 index 7f4f28ab8..000000000 --- a/qemu/roms/ipxe/src/drivers/net/ath/ath9k/ath9k_xmit.c +++ /dev/null @@ -1,813 +0,0 @@ -/* - * Copyright (c) 2008-2011 Atheros Communications Inc. - * - * Modified for iPXE by Scott K Logan <logans@cottsay.net> July 2011 - * Original from Linux kernel 3.0.1 - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -#include <ipxe/io.h> - -#include "ath9k.h" -#include "ar9003_mac.h" - -#define BITS_PER_BYTE 8 -#define OFDM_PLCP_BITS 22 -#define HT_RC_2_STREAMS(_rc) ((((_rc) & 0x78) >> 3) + 1) -#define L_STF 8 -#define L_LTF 8 -#define L_SIG 4 -#define HT_SIG 8 -#define HT_STF 4 -#define HT_LTF(_ns) (4 * (_ns)) -#define SYMBOL_TIME(_ns) ((_ns) << 2) /* ns * 4 us */ -#define SYMBOL_TIME_HALFGI(_ns) (((_ns) * 18 + 4) / 5) /* ns * 3.6 us */ -#define NUM_SYMBOLS_PER_USEC(_usec) (_usec >> 2) -#define NUM_SYMBOLS_PER_USEC_HALFGI(_usec) (((_usec*5)-4)/18) - - -#define IS_HT_RATE(_rate) ((_rate) & 0x80) - -static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, - struct ath_atx_tid *tid, - struct list_head *bf_head); -static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, - struct ath_txq *txq, struct list_head *bf_q, - struct ath_tx_status *ts, int txok, int sendbar); -static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, - struct list_head *head); -static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len); - -enum { - MCS_HT20, - MCS_HT20_SGI, - MCS_HT40, - MCS_HT40_SGI, -}; - -/*********************/ -/* Aggregation logic */ -/*********************/ - -static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid) -{ - struct ath_atx_ac *ac = tid->ac; - - if (tid->paused) - return; - - if (tid->sched) - return; - - tid->sched = 1; - list_add_tail(&tid->list, &ac->tid_q); - - if (ac->sched) - return; - - ac->sched = 1; - list_add_tail(&ac->list, &txq->axq_acq); -} - -static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) -{ - struct ath_buf *bf = NULL; - - if (list_empty(&sc->tx.txbuf)) { - return NULL; - } - - bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); - list_del(&bf->list); - - return bf; -} - -static void ath_tx_return_buffer(struct ath_softc *sc, struct ath_buf *bf) -{ - list_add_tail(&bf->list, &sc->tx.txbuf); -} - -/********************/ -/* Queue Management */ -/********************/ - -struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath9k_tx_queue_info qi; - static const int subtype_txq_to_hwq[] = { - [WME_AC_BE] = ATH_TXQ_AC_BE, - }; - int axq_qnum, i; - - memset(&qi, 0, sizeof(qi)); - qi.tqi_subtype = subtype_txq_to_hwq[subtype]; - qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; - qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; - qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; - qi.tqi_physCompBuf = 0; - - /* - * Enable interrupts only for EOL and DESC conditions. - * We mark tx descriptors to receive a DESC interrupt - * when a tx queue gets deep; otherwise waiting for the - * EOL to reap descriptors. Note that this is done to - * reduce interrupt load and this only defers reaping - * descriptors, never transmitting frames. Aside from - * reducing interrupts this also permits more concurrency. - * The only potential downside is if the tx queue backs - * up in which case the top half of the kernel may backup - * due to a lack of tx descriptors. - * - * The UAPSD queue is an exception, since we take a desc- - * based intr on the EOSP frames. - */ - qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | - TXQ_FLAG_TXDESCINT_ENABLE; - - axq_qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi); - if (axq_qnum == -1) { - /* - * NB: don't print a message, this happens - * normally on parts with too few tx queues - */ - return NULL; - } - if ((unsigned int)axq_qnum >= ARRAY_SIZE(sc->tx.txq)) { - DBG("ath9k: qnum %d out of range, max %zd!\n", - axq_qnum, ARRAY_SIZE(sc->tx.txq)); - ath9k_hw_releasetxqueue(ah, axq_qnum); - return NULL; - } - if (!ATH_TXQ_SETUP(sc, axq_qnum)) { - struct ath_txq *txq = &sc->tx.txq[axq_qnum]; - - txq->axq_qnum = axq_qnum; - txq->mac80211_qnum = -1; - txq->axq_link = NULL; - INIT_LIST_HEAD(&txq->axq_q); - INIT_LIST_HEAD(&txq->axq_acq); - txq->axq_depth = 0; - txq->axq_ampdu_depth = 0; - txq->axq_tx_inprogress = 0; - sc->tx.txqsetup |= 1<<axq_qnum; - - txq->txq_headidx = txq->txq_tailidx = 0; - for (i = 0; i < ATH_TXFIFO_DEPTH; i++) - INIT_LIST_HEAD(&txq->txq_fifo[i]); - INIT_LIST_HEAD(&txq->txq_fifo_pending); - } - return &sc->tx.txq[axq_qnum]; -} - -/* - * Drain a given TX queue (could be Beacon or Data) - * - * This assumes output has been stopped and - * we do not need to block ath_tx_tasklet. - */ -void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, int retry_tx __unused) -{ - struct ath_buf *bf, *lastbf __unused; - struct list_head bf_head; - struct ath_tx_status ts; - - memset(&ts, 0, sizeof(ts)); - INIT_LIST_HEAD(&bf_head); - - for (;;) { - if (list_empty(&txq->axq_q)) { - txq->axq_link = NULL; - break; - } - bf = list_first_entry(&txq->axq_q, struct ath_buf, - list); - - if (bf->bf_stale) { - list_del(&bf->list); - - ath_tx_return_buffer(sc, bf); - continue; - } - - lastbf = bf->bf_lastbf; - - list_cut_position(&bf_head, &txq->axq_q, &lastbf->list); - - txq->axq_depth--; - ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); - } - - txq->axq_tx_inprogress = 0; -} - -int ath_drain_all_txq(struct ath_softc *sc, int retry_tx) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath_txq *txq; - int i, npend = 0; - - if (sc->sc_flags & SC_OP_INVALID) - return 1; - - ath9k_hw_abort_tx_dma(ah); - - /* Check if any queue remains active */ - for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { - if (!ATH_TXQ_SETUP(sc, i)) - continue; - - npend += ath9k_hw_numtxpending(ah, sc->tx.txq[i].axq_qnum); - } - - if (npend) - DBG("ath9k: Failed to stop TX DMA!\n"); - - for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { - if (!ATH_TXQ_SETUP(sc, i)) - continue; - - /* - * The caller will resume queues with ieee80211_wake_queues. - * Mark the queue as not stopped to prevent ath_tx_complete - * from waking the queue too early. - */ - txq = &sc->tx.txq[i]; - txq->stopped = 0; - ath_draintxq(sc, txq, retry_tx); - } - - return !npend; -} - -void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) -{ - ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum); - sc->tx.txqsetup &= ~(1<<txq->axq_qnum); -} - -/* For each axq_acq entry, for each tid, try to schedule packets - * for transmit until ampdu_depth has reached min Q depth. - */ -void ath_txq_schedule(struct ath_softc *sc __unused, struct ath_txq *txq) -{ - struct ath_atx_ac *ac, *ac_tmp, *last_ac; - struct ath_atx_tid *tid, *last_tid; - - if (list_empty(&txq->axq_acq) || - txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) - return; - - ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list); - last_ac = list_entry(txq->axq_acq.prev, struct ath_atx_ac, list); - - list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) { - last_tid = list_entry(ac->tid_q.prev, struct ath_atx_tid, list); - list_del(&ac->list); - ac->sched = 0; - - while (!list_empty(&ac->tid_q)) { - tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, - list); - list_del(&tid->list); - tid->sched = 0; - - if (tid->paused) - continue; - - /* - * add tid to round-robin queue if more frames - * are pending for the tid - */ - if (!list_empty(&tid->buf_q)) - ath_tx_queue_tid(txq, tid); - - if (tid == last_tid || - txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) - break; - } - - if (!list_empty(&ac->tid_q)) { - if (!ac->sched) { - ac->sched = 1; - list_add_tail(&ac->list, &txq->axq_acq); - } - } - - if (ac == last_ac || - txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) - return; - } -} - -/***********/ -/* TX, DMA */ -/***********/ - -/* - * Insert a chain of ath_buf (descriptors) on a txq and - * assume the descriptors are already chained together by caller. - */ -static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, - struct list_head *head) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath_buf *bf; - - /* - * Insert the frame on the outbound list and - * pass it on to the hardware. - */ - - if (list_empty(head)) - return; - - bf = list_first_entry(head, struct ath_buf, list); - - DBGIO("ath9k: " - "qnum: %d, txq depth: %d\n", txq->axq_qnum, txq->axq_depth); - - list_splice_tail_init(head, &txq->axq_q); - - if (txq->axq_link == NULL) { - ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); - DBGIO("ath9k: TXDP[%d] = %llx (%p)\n", - txq->axq_qnum, ito64(bf->bf_daddr), - bf->bf_desc); - } else { - *txq->axq_link = bf->bf_daddr; - DBGIO("ath9k: " - "link[%d] (%p)=%llx (%p)\n", - txq->axq_qnum, txq->axq_link, - ito64(bf->bf_daddr), bf->bf_desc); - } - ath9k_hw_get_desc_link(ah, bf->bf_lastbf->bf_desc, - &txq->axq_link); - ath9k_hw_txstart(ah, txq->axq_qnum); - - txq->axq_depth++; -} - -static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, - struct ath_atx_tid *tid, - struct list_head *bf_head) -{ - struct ath_buf *bf; - - bf = list_first_entry(bf_head, struct ath_buf, list); - bf->bf_state.bf_type &= ~BUF_AMPDU; - - /* update starting sequence number for subsequent ADDBA request */ - if (tid) - INCR(tid->seq_start, IEEE80211_SEQ_MAX); - - bf->bf_lastbf = bf; - ath_buf_set_rate(sc, bf, iob_len(bf->bf_mpdu) + FCS_LEN); - ath_tx_txqaddbuf(sc, txq, bf_head); -} - -static enum ath9k_pkt_type get_hw_packet_type(struct io_buffer *iob) -{ - struct ieee80211_frame *hdr; - enum ath9k_pkt_type htype; - u16 fc; - - hdr = (struct ieee80211_frame *)iob->data; - fc = hdr->fc; - - if ((fc & (IEEE80211_FC_TYPE | IEEE80211_FC_SUBTYPE)) == (IEEE80211_TYPE_MGMT | IEEE80211_STYPE_BEACON)) - htype = ATH9K_PKT_TYPE_BEACON; - else if ((fc & (IEEE80211_FC_TYPE | IEEE80211_FC_SUBTYPE)) == (IEEE80211_TYPE_MGMT | IEEE80211_STYPE_PROBE_RESP)) - htype = ATH9K_PKT_TYPE_PROBE_RESP; - else - htype = ATH9K_PKT_TYPE_NORMAL; - - return htype; -} - -static int setup_tx_flags(struct io_buffer *iob __unused) -{ - int flags = 0; - - flags |= ATH9K_TXDESC_INTREQ; - - return flags; -} - -u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath9k_channel *curchan = ah->curchan; - if ((sc->sc_flags & SC_OP_ENABLE_APM) && - (curchan->channelFlags & CHANNEL_5GHZ) && - (chainmask == 0x7) && (rate < 0x90)) - return 0x3; - else - return chainmask; -} - -static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, int len) -{ - struct ath_common *common = ath9k_hw_common(sc->sc_ah); - struct ath9k_11n_rate_series series[4]; - const struct ath9k_legacy_rate *rate; - int i, flags = 0; - u8 rix = 0, ctsrate = 0; - int is_pspoll; - - memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); - - is_pspoll = 0; - - /* - * We check if Short Preamble is needed for the CTS rate by - * checking the BSS's global flag. - * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. - */ - rate = &sc->rates[sc->hw_rix]; - ctsrate = rate->hw_value; - if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) - ctsrate |= rate->hw_value_short; - - for (i = 0; i < 4; i++) { - int is_40 __unused, is_sgi __unused, is_sp; - int phy; - - rix = sc->hw_rix; - series[i].Tries = ATH_TXMAXTRY; - - if (sc->sc_flags & SC_OP_PROTECT_ENABLE) { - series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; - flags |= ATH9K_TXDESC_CTSENA; - } - - is_sp = !!(rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE); - - /* legacy rates */ - if ((sc->dev->channels + sc->dev->channel)->band == NET80211_BAND_2GHZ) - phy = CHANNEL_CCK; - else - phy = CHANNEL_OFDM; - - series[i].Rate = rate->hw_value; - if (rate->hw_value_short && (sc->sc_flags & SC_OP_PREAMBLE_SHORT)) { - if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) - series[i].Rate |= rate->hw_value_short; - } else { - is_sp = 0; - } - - if (bf->bf_state.bfs_paprd) - series[i].ChSel = common->tx_chainmask; - else - series[i].ChSel = ath_txchainmask_reduction(sc, - common->tx_chainmask, series[i].Rate); - - series[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah, - phy, rate->bitrate * 100, len, rix, is_sp); - } - - /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ - if (bf_isaggr(bf) && (len > sc->sc_ah->caps.rts_aggr_limit)) - flags &= ~ATH9K_TXDESC_RTSENA; - - /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */ - if (flags & ATH9K_TXDESC_RTSENA) - flags &= ~ATH9K_TXDESC_CTSENA; - - /* set dur_update_en for l-sig computation except for PS-Poll frames */ - ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc, - bf->bf_lastbf->bf_desc, - !is_pspoll, ctsrate, - 0, series, 4, flags); - -} - -static struct ath_buf *ath_tx_setup_buffer(struct net80211_device *dev, - struct ath_txq *txq, - struct io_buffer *iob) -{ - struct ath_softc *sc = dev->priv; - struct ath_hw *ah = sc->sc_ah; - struct ath_buf *bf; - struct ath_desc *ds; - int frm_type; - static const enum ath9k_key_type net80211_keytype_to_ath[] = { - [NET80211_CRYPT_NONE] = ATH9K_KEY_TYPE_CLEAR, - [NET80211_CRYPT_WEP] = ATH9K_KEY_TYPE_WEP, - [NET80211_CRYPT_TKIP] = ATH9K_KEY_TYPE_TKIP, - [NET80211_CRYPT_CCMP] = ATH9K_KEY_TYPE_AES, - [NET80211_CRYPT_UNKNOWN] = ATH9K_KEY_TYPE_CLEAR, - }; - - bf = ath_tx_get_buffer(sc); - if (!bf) { - DBG("ath9k: TX buffers are full\n"); - return NULL; - } - - ATH_TXBUF_RESET(bf); - - bf->bf_flags = setup_tx_flags(iob); - bf->bf_mpdu = iob; - - bf->bf_buf_addr = virt_to_bus(iob->data); - - frm_type = get_hw_packet_type(iob); - - ds = bf->bf_desc; - ath9k_hw_set_desc_link(ah, ds, 0); - - ath9k_hw_set11n_txdesc(ah, ds, iob_len(iob) + FCS_LEN, frm_type, MAX_RATE_POWER, - ATH9K_TXKEYIX_INVALID, net80211_keytype_to_ath[dev->crypto->algorithm], bf->bf_flags); - - ath9k_hw_filltxdesc(ah, ds, - iob_len(iob), /* segment length */ - 1, /* first segment */ - 1, /* last segment */ - ds, /* first descriptor */ - bf->bf_buf_addr, - txq->axq_qnum); - - - return bf; -} - -/* FIXME: tx power */ -static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, - struct ath_tx_control *txctl) -{ - struct list_head bf_head; - struct ath_atx_tid *tid = NULL; - - INIT_LIST_HEAD(&bf_head); - list_add_tail(&bf->list, &bf_head); - - bf->bf_state.bfs_paprd = txctl->paprd; - - if (txctl->paprd) - bf->bf_state.bfs_paprd_timestamp = ( currticks() * 1000 ) / TICKS_PER_SEC; - - ath9k_hw_set_clrdmask(sc->sc_ah, bf->bf_desc, 1); - - ath_tx_send_normal(sc, txctl->txq, tid, &bf_head); -} - -/* Upon failure caller should free iob */ -int ath_tx_start(struct net80211_device *dev, struct io_buffer *iob, - struct ath_tx_control *txctl) -{ - struct ath_softc *sc = dev->priv; - struct ath_txq *txq = txctl->txq; - struct ath_buf *bf; - int q; - - /* - * At this point, the vif, hw_key and sta pointers in the tx control - * info are no longer valid (overwritten by the ath_frame_info data. - */ - - bf = ath_tx_setup_buffer(dev, txctl->txq, iob); - if (!bf) - return -ENOMEM; - - q = 0; - if (txq == sc->tx.txq_map[q] && - ++txq->pending_frames > ATH_MAX_QDEPTH && !txq->stopped) { - txq->stopped = 1; - } - - ath_tx_start_dma(sc, bf, txctl); - - return 0; -} - -/*****************/ -/* TX Completion */ -/*****************/ - -static void ath_tx_complete(struct ath_softc *sc, struct io_buffer *iob, - int tx_flags __unused, struct ath_tx_status *ts, struct ath_txq *txq) -{ - struct net80211_device *dev = sc->dev; - int q, padpos __unused, padsize __unused; - - DBGIO("ath9k: TX complete: iob: %p\n", iob); - - q = 0; - if (txq == sc->tx.txq_map[q]) { - if (--txq->pending_frames < 0) - txq->pending_frames = 0; - - if (txq->stopped && txq->pending_frames < ATH_MAX_QDEPTH) { - txq->stopped = 0; - } - } - - net80211_tx_complete(dev, iob, ts->ts_longretry, - (ts->ts_status & ATH9K_TXERR_MASK) ? EIO : 0); -} - -static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, - struct ath_txq *txq, struct list_head *bf_q, - struct ath_tx_status *ts, int txok, int sendbar) -{ - struct io_buffer *iob = bf->bf_mpdu; - int tx_flags = 0; - - if (sendbar) - tx_flags = ATH_TX_BAR; - - if (!txok) { - tx_flags |= ATH_TX_ERROR; - - if (bf_isxretried(bf)) - tx_flags |= ATH_TX_XRETRY; - } - - bf->bf_buf_addr = 0; - - ath_tx_complete(sc, iob, tx_flags, - ts, txq); - - /* At this point, iob (bf->bf_mpdu) is consumed...make sure we don't - * accidentally reference it later. - */ - bf->bf_mpdu = NULL; - - /* - * Return the list of ath_buf of this mpdu to free queue - */ - list_splice_tail_init(bf_q, &sc->tx.txbuf); -} - -static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) -{ - struct ath_hw *ah = sc->sc_ah; - struct ath_buf *bf, *lastbf, *bf_held = NULL; - struct list_head bf_head; - struct ath_desc *ds; - struct ath_tx_status ts; - int txok; - int status; - - DBGIO("ath9k: tx queue %d (%x), link %p\n", - txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum), - txq->axq_link); - - for (;;) { - if (list_empty(&txq->axq_q)) { - txq->axq_link = NULL; - if (sc->sc_flags & SC_OP_TXAGGR) - ath_txq_schedule(sc, txq); - break; - } - bf = list_first_entry(&txq->axq_q, struct ath_buf, list); - - /* - * There is a race condition that a BH gets scheduled - * after sw writes TxE and before hw re-load the last - * descriptor to get the newly chained one. - * Software must keep the last DONE descriptor as a - * holding descriptor - software does so by marking - * it with the STALE flag. - */ - bf_held = NULL; - if (bf->bf_stale) { - bf_held = bf; - if (list_is_last(&bf_held->list, &txq->axq_q)) { - break; - } else { - bf = list_entry(bf_held->list.next, - struct ath_buf, list); - } - } - - lastbf = bf->bf_lastbf; - ds = lastbf->bf_desc; - - memset(&ts, 0, sizeof(ts)); - status = ath9k_hw_txprocdesc(ah, ds, &ts); - if (status == -EINPROGRESS) { - break; - } - - /* - * Remove ath_buf's of the same transmit unit from txq, - * however leave the last descriptor back as the holding - * descriptor for hw. - */ - lastbf->bf_stale = 1; - INIT_LIST_HEAD(&bf_head); - if (!list_is_singular(&lastbf->list)) - list_cut_position(&bf_head, - &txq->axq_q, lastbf->list.prev); - - txq->axq_depth--; - txok = !(ts.ts_status & ATH9K_TXERR_MASK); - txq->axq_tx_inprogress = 0; - if (bf_held) - list_del(&bf_held->list); - - if (bf_held) - ath_tx_return_buffer(sc, bf_held); - - /* - * This frame is sent out as a single frame. - * Use hardware retry status for this frame. - */ - if (ts.ts_status & ATH9K_TXERR_XRETRY) - bf->bf_state.bf_type |= BUF_XRETRY; - - ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, txok, 0); - - if (sc->sc_flags & SC_OP_TXAGGR) - ath_txq_schedule(sc, txq); - } -} - -static void ath_tx_complete_poll_work(struct ath_softc *sc) -{ - struct ath_txq *txq; - int i; - int needreset = 0; - - for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) - if (ATH_TXQ_SETUP(sc, i)) { - txq = &sc->tx.txq[i]; - if (txq->axq_depth) { - if (txq->axq_tx_inprogress) { - needreset = 1; - break; - } else { - txq->axq_tx_inprogress = 1; - } - } - } - - if (needreset) { - DBG("ath9k: " - "tx hung, resetting the chip\n"); - ath_reset(sc, 1); - } - - sc->tx_complete_work_timer = ( currticks() * 1000 ) / TICKS_PER_SEC + ATH_TX_COMPLETE_POLL_INT; -} - - - -void ath_tx_tasklet(struct ath_softc *sc) -{ - int i; - u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1); - - ath9k_hw_gettxintrtxqs(sc->sc_ah, &qcumask); - - for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { - if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) - ath_tx_processq(sc, &sc->tx.txq[i]); - } -} - -/*****************/ -/* Init, Cleanup */ -/*****************/ - -int ath_tx_init(struct ath_softc *sc, int nbufs) -{ - int error = 0; - - error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf, - "tx", nbufs, 1, 1); - if (error != 0) { - DBG("ath9k: " - "Failed to allocate tx descriptors: %d\n", error); - goto err; - } - - sc->tx_complete_work = ath_tx_complete_poll_work; - -err: - if (error != 0) - ath_tx_cleanup(sc); - - return error; -} - -void ath_tx_cleanup(struct ath_softc *sc) -{ - if (sc->tx.txdma.dd_desc_len != 0) - ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf); -} |