#include <ipxe/io.h>
#include "ath9k.h"
#include "ar9003_mac.h"

Macros
#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)

Enumerations
enum	{ MCS_HT20, MCS_HT20_SGI, MCS_HT40, MCS_HT40_SGI }

Functions
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)

static void	ath_tx_queue_tid (struct ath_txq txq, struct ath_atx_tid tid)

static struct ath_buf *	ath_tx_get_buffer (struct ath_softc *sc)

static void	ath_tx_return_buffer (struct ath_softc sc, struct ath_buf bf)

struct ath_txq *	ath_txq_setup (struct ath_softc *sc, int qtype, int subtype)

void	ath_draintxq (struct ath_softc sc, struct ath_txq txq, int retry_tx __unused)

int	ath_drain_all_txq (struct ath_softc *sc, int retry_tx)

void	ath_tx_cleanupq (struct ath_softc sc, struct ath_txq txq)

void	ath_txq_schedule (struct ath_softc sc __unused, struct ath_txq txq)

static enum ath9k_pkt_type	get_hw_packet_type (struct io_buffer *iob)

static int	setup_tx_flags (struct io_buffer *iob __unused)

u8	ath_txchainmask_reduction (struct ath_softc *sc, u8 chainmask, u32 rate)

static struct ath_buf *	ath_tx_setup_buffer (struct net80211_device dev, struct ath_txq txq, struct io_buffer *iob)

static void	ath_tx_start_dma (struct ath_softc sc, struct ath_buf bf, struct ath_tx_control *txctl)

int	ath_tx_start (struct net80211_device dev, struct io_buffer iob, struct ath_tx_control *txctl)

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)

static void	ath_tx_processq (struct ath_softc sc, struct ath_txq txq)

static void	ath_tx_complete_poll_work (struct ath_softc *sc)

void	ath_tx_tasklet (struct ath_softc *sc)

int	ath_tx_init (struct ath_softc *sc, int nbufs)

void	ath_tx_cleanup (struct ath_softc *sc)

Macro Definition Documentation

◆ BITS_PER_BYTE

#define BITS_PER_BYTE 8

Definition at line 25 of file ath9k_xmit.c.

◆ OFDM_PLCP_BITS

#define OFDM_PLCP_BITS 22

Definition at line 26 of file ath9k_xmit.c.

◆ HT_RC_2_STREAMS

#define HT_RC_2_STREAMS ( _rc ) ((((_rc) & 0x78) >> 3) + 1)

Definition at line 27 of file ath9k_xmit.c.

◆ L_STF

#define L_STF 8

Definition at line 28 of file ath9k_xmit.c.

◆ L_LTF

#define L_LTF 8

Definition at line 29 of file ath9k_xmit.c.

◆ L_SIG

#define L_SIG 4

Definition at line 30 of file ath9k_xmit.c.

◆ HT_SIG

#define HT_SIG 8

Definition at line 31 of file ath9k_xmit.c.

◆ HT_STF

#define HT_STF 4

Definition at line 32 of file ath9k_xmit.c.

◆ HT_LTF

#define HT_LTF ( _ns ) (4 * (_ns))

Definition at line 33 of file ath9k_xmit.c.

◆ SYMBOL_TIME

#define SYMBOL_TIME ( _ns ) ((_ns) << 2) /* ns * 4 us */

Definition at line 34 of file ath9k_xmit.c.

◆ SYMBOL_TIME_HALFGI

#define SYMBOL_TIME_HALFGI ( _ns ) (((_ns) * 18 + 4) / 5) /* ns * 3.6 us */

Definition at line 35 of file ath9k_xmit.c.

◆ NUM_SYMBOLS_PER_USEC

#define NUM_SYMBOLS_PER_USEC ( _usec ) (_usec >> 2)

Definition at line 36 of file ath9k_xmit.c.

◆ NUM_SYMBOLS_PER_USEC_HALFGI

#define NUM_SYMBOLS_PER_USEC_HALFGI ( _usec ) (((_usec*5)-4)/18)

Definition at line 37 of file ath9k_xmit.c.

◆ IS_HT_RATE

#define IS_HT_RATE ( _rate ) ((_rate) & 0x80)

Definition at line 40 of file ath9k_xmit.c.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
MCS_HT20
MCS_HT20_SGI
MCS_HT40
MCS_HT40_SGI

Definition at line 52 of file ath9k_xmit.c.

      {
         MCS_HT20,
         MCS_HT20_SGI,
         MCS_HT40,
         MCS_HT40_SGI,
 };

Function Documentation

◆ ath_tx_send_normal()

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

Definition at line 363 of file ath9k_xmit.c.

 {
         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);
 }

References ath_buf_set_rate(), ath_tx_txqaddbuf(), ath_buf::bf_lastbf, ath_buf::bf_mpdu, ath_buf::bf_state, ath_buf_state::bf_type, BUF_AMPDU, FCS_LEN, IEEE80211_SEQ_MAX, INCR, iob_len(), ath_buf::list, list_first_entry, and tid.

Referenced by ath_tx_start_dma().

◆ ath_tx_complete_buf()

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

Definition at line 623 of file ath9k_xmit.c.

 {
         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);
 }

References ATH_TX_BAR, ath_tx_complete(), ATH_TX_ERROR, ATH_TX_XRETRY, ath_buf::bf_buf_addr, bf_isxretried, ath_buf::bf_mpdu, list_splice_tail_init, NULL, ath_softc::tx, and ath_tx::txbuf.

Referenced by ath_draintxq(), and ath_tx_processq().

◆ ath_tx_txqaddbuf()

static void ath_tx_txqaddbuf	(	struct ath_softc *	sc,
		struct ath_txq *	txq,
		struct list_head *	head
	)

static

Definition at line 323 of file ath9k_xmit.c.

 {
         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++;
 }

References ah, ath9k_hw_get_desc_link(), ath9k_hw_puttxbuf(), ath9k_hw_txstart(), ath_txq::axq_depth, ath_txq::axq_link, ath_txq::axq_q, ath_txq::axq_qnum, ath_buf::bf_daddr, ath_buf::bf_desc, ath_buf::bf_lastbf, DBGIO, head, ito64, ath_buf::list, list_empty, list_first_entry, list_splice_tail_init, NULL, and ath_softc::sc_ah.

Referenced by ath_tx_send_normal().

◆ ath_buf_set_rate()

static void ath_buf_set_rate	(	struct ath_softc *	sc,
		struct ath_buf *	bf,
		int	len
	)

static

Definition at line 421 of file ath9k_xmit.c.

 {
         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);
 
 }

References __unused, ath9k_hw_common(), ath9k_hw_computetxtime(), ath9k_hw_set11n_ratescenario(), ATH9K_RATESERIES_RTS_CTS, ATH9K_TXDESC_CTSENA, ATH9K_TXDESC_RTSENA, ath_txchainmask_reduction(), ATH_TXMAXTRY, ath_buf::bf_desc, bf_isaggr, ath_buf::bf_lastbf, ath_buf::bf_state, ath_buf_state::bfs_paprd, ath9k_legacy_rate::bitrate, ath_hw::caps, net80211_device::channel, CHANNEL_CCK, CHANNEL_OFDM, net80211_device::channels, ath9k_11n_rate_series::ChSel, common, ath_softc::dev, flags, ath9k_legacy_rate::flags, ath_softc::hw_rix, ath9k_legacy_rate::hw_value, ath9k_legacy_rate::hw_value_short, IEEE80211_TX_RC_USE_SHORT_PREAMBLE, len, memset(), NET80211_BAND_2GHZ, ath9k_11n_rate_series::PktDuration, ath9k_11n_rate_series::Rate, ath9k_11n_rate_series::RateFlags, ath_softc::rates, ath9k_hw_capabilities::rts_aggr_limit, ath_softc::sc_ah, ath_softc::sc_flags, SC_OP_PREAMBLE_SHORT, SC_OP_PROTECT_ENABLE, and ath9k_11n_rate_series::Tries.

Referenced by ath_tx_send_normal().

◆ ath_tx_queue_tid()

static void ath_tx_queue_tid	(	struct ath_txq *	txq,
		struct ath_atx_tid *	tid
	)

static

Definition at line 63 of file ath9k_xmit.c.

 {
         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);
 }

References ath_txq::axq_acq, ath_atx_ac::list, list_add_tail, ath_atx_ac::sched, tid, ath_atx_ac::tid_q, and ath_atx_ac::txq.

Referenced by ath_txq_schedule().

◆ ath_tx_get_buffer()

static struct ath_buf* ath_tx_get_buffer ( struct ath_softc * sc )

static

Definition at line 83 of file ath9k_xmit.c.

 {
         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;
 }

References ath_buf::list, list_del, list_empty, list_first_entry, NULL, ath_softc::tx, and ath_tx::txbuf.

Referenced by ath_tx_setup_buffer().

◆ ath_tx_return_buffer()

static void ath_tx_return_buffer	(	struct ath_softc *	sc,
		struct ath_buf *	bf
	)

static

Definition at line 97 of file ath9k_xmit.c.

 {
         list_add_tail(&bf->list, &sc->tx.txbuf);
 }

References ath_buf::list, list_add_tail, ath_softc::tx, and ath_tx::txbuf.

Referenced by ath_draintxq(), and ath_tx_processq().

◆ ath_txq_setup()

struct ath_txq* ath_txq_setup	(	struct ath_softc *	sc,
		int	qtype,
		int	subtype
	)

Definition at line 106 of file ath9k_xmit.c.

 {
         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];
 }

References ah, ARRAY_SIZE, ath9k_hw_releasetxqueue(), ath9k_hw_setuptxqueue(), ATH9K_TXQ_USEDEFAULT, ATH_TXFIFO_DEPTH, ATH_TXQ_AC_BE, ATH_TXQ_SETUP, ath_txq::axq_acq, ath_txq::axq_ampdu_depth, ath_txq::axq_depth, ath_txq::axq_link, ath_txq::axq_q, ath_txq::axq_qnum, ath_txq::axq_tx_inprogress, DBG, INIT_LIST_HEAD, ath_txq::mac80211_qnum, memset(), NULL, ath_softc::sc_ah, subtype, ath9k_tx_queue_info::tqi_aifs, ath9k_tx_queue_info::tqi_cwmax, ath9k_tx_queue_info::tqi_cwmin, ath9k_tx_queue_info::tqi_physCompBuf, ath9k_tx_queue_info::tqi_qflags, ath9k_tx_queue_info::tqi_subtype, ath_softc::tx, ath_tx::txq, ath_txq::txq_fifo, ath_txq::txq_fifo_pending, TXQ_FLAG_TXDESCINT_ENABLE, TXQ_FLAG_TXEOLINT_ENABLE, ath_txq::txq_headidx, ath_txq::txq_tailidx, ath_tx::txqsetup, and WME_AC_BE.

Referenced by ath9k_init_queues().

◆ ath_draintxq()

void ath_draintxq	(	struct ath_softc *	sc,
		struct ath_txq *	txq,
		int retry_tx	__unused
	)

Definition at line 181 of file ath9k_xmit.c.

 {
         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;
 }

References __unused, ath_tx_complete_buf(), ath_tx_return_buffer(), ath_txq::axq_depth, ath_txq::axq_link, ath_txq::axq_q, ath_txq::axq_tx_inprogress, ath_buf::bf_lastbf, ath_buf::bf_stale, INIT_LIST_HEAD, ath_buf::list, list_cut_position, list_del, list_empty, list_first_entry, memset(), and NULL.

Referenced by ath_drain_all_txq().

◆ ath_drain_all_txq()

int ath_drain_all_txq	(	struct ath_softc *	sc,
		int	retry_tx
	)

Definition at line 216 of file ath9k_xmit.c.

 {
         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;
 }

References ah, ath9k_hw_abort_tx_dma(), ath9k_hw_numtxpending(), ATH9K_NUM_TX_QUEUES, ath_draintxq(), ATH_TXQ_SETUP, ath_txq::axq_qnum, DBG, ath_softc::sc_ah, ath_softc::sc_flags, SC_OP_INVALID, ath_txq::stopped, ath_softc::tx, and ath_tx::txq.

Referenced by ath9k_stop(), ath_radio_disable(), ath_reset(), and ath_set_channel().

◆ ath_tx_cleanupq()

void ath_tx_cleanupq	(	struct ath_softc *	sc,
		struct ath_txq *	txq
	)

Definition at line 255 of file ath9k_xmit.c.

 {
         ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum);
         sc->tx.txqsetup &= ~(1<<txq->axq_qnum);
 }

References ath9k_hw_releasetxqueue(), ath_txq::axq_qnum, ath_softc::sc_ah, ath_softc::tx, and ath_tx::txqsetup.

Referenced by ath9k_deinit_softc(), and ath9k_init_softc().

◆ ath_txq_schedule()

void ath_txq_schedule	(	struct ath_softc *sc	__unused,
		struct ath_txq *	txq
	)

Definition at line 264 of file ath9k_xmit.c.

 {
         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;
         }
 }

References ath_atx_tid::ac, ATH_AGGR_MIN_QDEPTH, ath_tx_queue_tid(), ath_txq::axq_acq, ath_txq::axq_ampdu_depth, ath_atx_ac::list, ath_atx_tid::list, list_add_tail, list_del, list_empty, list_entry, list_first_entry, list_for_each_entry_safe, list_head::prev, ath_atx_ac::sched, tid, and ath_atx_ac::tid_q.

Referenced by ath_tx_processq().

◆ get_hw_packet_type()

static enum ath9k_pkt_type get_hw_packet_type ( struct io_buffer * iob )

static

Definition at line 381 of file ath9k_xmit.c.

 {
         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;
 }

References ATH9K_PKT_TYPE_BEACON, ATH9K_PKT_TYPE_NORMAL, ATH9K_PKT_TYPE_PROBE_RESP, io_buffer::data, fc, hdr, IEEE80211_FC_SUBTYPE, IEEE80211_FC_TYPE, IEEE80211_STYPE_BEACON, IEEE80211_STYPE_PROBE_RESP, IEEE80211_TYPE_MGMT, and if().

Referenced by ath_tx_setup_buffer().

◆ setup_tx_flags()

static int setup_tx_flags ( struct io_buffer *iob __unused )

static

Definition at line 400 of file ath9k_xmit.c.

 {
         int flags = 0;
 
         flags |= ATH9K_TXDESC_INTREQ;
 
         return flags;
 }

References ATH9K_TXDESC_INTREQ, and flags.

Referenced by ath_tx_setup_buffer().

◆ ath_txchainmask_reduction()

u8 ath_txchainmask_reduction	(	struct ath_softc *	sc,
		u8	chainmask,
		u32	rate
	)

Definition at line 409 of file ath9k_xmit.c.

 {
         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;
 }

References ah, CHANNEL_5GHZ, ath9k_channel::channelFlags, ath_softc::sc_ah, ath_softc::sc_flags, and SC_OP_ENABLE_APM.

Referenced by ath_buf_set_rate().

◆ ath_tx_setup_buffer()

static struct ath_buf* ath_tx_setup_buffer	(	struct net80211_device *	dev,
		struct ath_txq *	txq,
		struct io_buffer *	iob
	)

static

Definition at line 498 of file ath9k_xmit.c.

 {
         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;
 }

References ah, net80211_crypto::algorithm, ath9k_hw_filltxdesc(), ath9k_hw_set11n_txdesc(), ath9k_hw_set_desc_link(), ATH9K_KEY_TYPE_AES, ATH9K_KEY_TYPE_CLEAR, ATH9K_KEY_TYPE_TKIP, ATH9K_KEY_TYPE_WEP, ATH9K_TXKEYIX_INVALID, ath_tx_get_buffer(), ATH_TXBUF_RESET, ath_txq::axq_qnum, ath_buf::bf_buf_addr, ath_buf::bf_desc, ath_buf::bf_flags, ath_buf::bf_mpdu, net80211_device::crypto, io_buffer::data, DBG, ath_softc::dev, ds, FCS_LEN, get_hw_packet_type(), iob_len(), MAX_RATE_POWER, NET80211_CRYPT_CCMP, NET80211_CRYPT_NONE, NET80211_CRYPT_TKIP, NET80211_CRYPT_UNKNOWN, NET80211_CRYPT_WEP, NULL, net80211_device::priv, ath_softc::sc_ah, setup_tx_flags(), and virt_to_bus().

Referenced by ath_tx_start().

◆ ath_tx_start_dma()

static void ath_tx_start_dma	(	struct ath_softc *	sc,
		struct ath_buf *	bf,
		struct ath_tx_control *	txctl
	)

static

Definition at line 549 of file ath9k_xmit.c.

 {
         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);
 }

References ath9k_hw_set_clrdmask(), ath_tx_send_normal(), ath_buf::bf_desc, ath_buf::bf_state, ath_buf_state::bfs_paprd, ath_buf_state::bfs_paprd_timestamp, currticks(), INIT_LIST_HEAD, ath_buf::list, list_add_tail, NULL, ath_tx_control::paprd, ath_softc::sc_ah, TICKS_PER_SEC, tid, and ath_tx_control::txq.

Referenced by ath_tx_start().

◆ ath_tx_start()

int ath_tx_start	(	struct net80211_device *	dev,
		struct io_buffer *	iob,
		struct ath_tx_control *	txctl
	)

Definition at line 569 of file ath9k_xmit.c.

 {
         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;
 }

References ATH_MAX_QDEPTH, ath_tx_setup_buffer(), ath_tx_start_dma(), ath_softc::dev, ENOMEM, ath_txq::pending_frames, net80211_device::priv, ath_txq::stopped, ath_softc::tx, ath_tx_control::txq, and ath_tx::txq_map.

Referenced by ath9k_tx().

◆ ath_tx_complete()

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
	)

static

Definition at line 601 of file ath9k_xmit.c.

 {
         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);
 }

References __unused, ATH9K_TXERR_MASK, ATH_MAX_QDEPTH, DBGIO, ath_softc::dev, EIO, net80211_tx_complete(), ath_txq::pending_frames, ath_txq::stopped, ath_tx_status::ts_longretry, ath_tx_status::ts_status, ath_softc::tx, and ath_tx::txq_map.

Referenced by ath_tx_complete_buf().

◆ ath_tx_processq()

static void ath_tx_processq	(	struct ath_softc *	sc,
		struct ath_txq *	txq
	)

static

Definition at line 656 of file ath9k_xmit.c.

 {
         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);
         }
 }

References ah, ath9k_hw_gettxbuf(), ath9k_hw_txprocdesc(), ATH9K_TXERR_MASK, ATH9K_TXERR_XRETRY, ath_tx_complete_buf(), ath_tx_return_buffer(), ath_txq_schedule(), ath_txq::axq_depth, ath_txq::axq_link, ath_txq::axq_q, ath_txq::axq_qnum, ath_txq::axq_tx_inprogress, ath_buf::bf_desc, ath_buf::bf_lastbf, ath_buf::bf_stale, ath_buf::bf_state, ath_buf_state::bf_type, BUF_XRETRY, DBGIO, ds, EINPROGRESS, INIT_LIST_HEAD, ath_buf::list, list_cut_position, list_del, list_empty, list_entry, list_first_entry, list_is_last, list_is_singular, memset(), list_head::next, NULL, list_head::prev, ath_softc::sc_ah, ath_softc::sc_flags, SC_OP_TXAGGR, status, and ath_tx_status::ts_status.

Referenced by ath_tx_tasklet().

◆ ath_tx_complete_poll_work()

static void ath_tx_complete_poll_work ( struct ath_softc * sc )

static

Definition at line 741 of file ath9k_xmit.c.

 {
         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;
 }

References ATH9K_NUM_TX_QUEUES, ath_reset(), ATH_TX_COMPLETE_POLL_INT, ATH_TXQ_SETUP, ath_txq::axq_depth, ath_txq::axq_tx_inprogress, currticks(), DBG, TICKS_PER_SEC, ath_softc::tx, ath_softc::tx_complete_work_timer, and ath_tx::txq.

Referenced by ath_tx_init().

◆ ath_tx_tasklet()

void ath_tx_tasklet ( struct ath_softc * sc )

Definition at line 771 of file ath9k_xmit.c.

 {
         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]);
         }
 }

References ath9k_hw_gettxintrtxqs(), ATH9K_NUM_TX_QUEUES, ath_tx_processq(), ATH_TXQ_SETUP, ath_softc::sc_ah, ath_softc::tx, and ath_tx::txq.

Referenced by ath9k_tasklet().

◆ ath_tx_init()

int ath_tx_init	(	struct ath_softc *	sc,
		int	nbufs
	)

Definition at line 788 of file ath9k_xmit.c.

 {
         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;
 }

References ath_descdma_setup(), ath_tx_cleanup(), ath_tx_complete_poll_work(), DBG, error, ath_softc::tx, ath_softc::tx_complete_work, ath_tx::txbuf, and ath_tx::txdma.

Referenced by ath9k_init_device().

◆ ath_tx_cleanup()

void ath_tx_cleanup ( struct ath_softc * sc )

Definition at line 809 of file ath9k_xmit.c.

 {
         if (sc->tx.txdma.dd_desc_len != 0)
                 ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf);
 }

References ath_descdma_cleanup(), ath_descdma::dd_desc_len, ath_softc::tx, ath_tx::txbuf, and ath_tx::txdma.

Referenced by ath9k_deinit_device(), ath9k_init_device(), and ath_tx_init().

Macros

Enumerations

Functions

Macro Definition Documentation

◆ BITS_PER_BYTE

◆ OFDM_PLCP_BITS

◆ HT_RC_2_STREAMS

◆ L_STF

◆ L_LTF

◆ L_SIG

◆ HT_SIG

◆ HT_STF

◆ HT_LTF

◆ SYMBOL_TIME

◆ SYMBOL_TIME_HALFGI

◆ NUM_SYMBOLS_PER_USEC

◆ NUM_SYMBOLS_PER_USEC_HALFGI

◆ IS_HT_RATE

Enumeration Type Documentation

◆ anonymous enum

Function Documentation

◆ ath_tx_send_normal()

◆ ath_tx_complete_buf()

◆ ath_tx_txqaddbuf()

◆ ath_buf_set_rate()

◆ ath_tx_queue_tid()

◆ ath_tx_get_buffer()

◆ ath_tx_return_buffer()

◆ ath_txq_setup()

◆ ath_draintxq()

◆ ath_drain_all_txq()

◆ ath_tx_cleanupq()

◆ ath_txq_schedule()

◆ get_hw_packet_type()

◆ setup_tx_flags()

◆ ath_txchainmask_reduction()

◆ ath_tx_setup_buffer()

◆ ath_tx_start_dma()

◆ ath_tx_start()

◆ ath_tx_complete()

◆ ath_tx_processq()

◆ ath_tx_complete_poll_work()

◆ ath_tx_tasklet()

◆ ath_tx_init()

◆ ath_tx_cleanup()