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ath9k: Use bitfields for buffer type

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Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith 2008-08-11 14:03:34 +05:30 committed by John W. Linville
parent 7dcfdcd908
commit cd3d39a687
2 changed files with 83 additions and 79 deletions
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58
drivers/net/wireless/ath9k/core.h
View File

@ -177,11 +177,6 @@ void ath_update_chainmask(struct ath_softc *sc, int is_ht);
/* Descriptor Management */
/*************************/
/* Number of descriptors per buffer. The only case where we see skbuff
chains is due to FF aggregation in the driver. */
#define ATH_TXDESC 1
/* if there's more fragment for this MSDU */
#define ATH_BF_MORE_MPDU 1
#define ATH_TXBUF_RESET(_bf) do { \
(_bf)->bf_status = 0; \
(_bf)->bf_lastbf = NULL; \
@ -191,6 +186,20 @@ chains is due to FF aggregation in the driver. */
sizeof(struct ath_buf_state)); \
} while (0)
enum buffer_type {
BUF_DATA = BIT(0),
BUF_AGGR = BIT(1),
BUF_AMPDU = BIT(2),
BUF_HT = BIT(3),
BUF_RETRY = BIT(4),
BUF_XRETRY = BIT(5),
BUF_SHORT_PREAMBLE = BIT(6),
BUF_BAR = BIT(7),
BUF_PSPOLL = BIT(8),
BUF_AGGR_BURST = BIT(9),
BUF_CALC_AIRTIME = BIT(10),
};
struct ath_buf_state {
int bfs_nframes; /* # frames in aggregate */
u16 bfs_al; /* length of aggregate */
@ -199,20 +208,7 @@ struct ath_buf_state {
int bfs_tidno; /* tid of this frame */
int bfs_retries; /* current retries */
struct ath_rc_series bfs_rcs[4]; /* rate series */
u8 bfs_isdata:1; /* is a data frame/aggregate */
u8 bfs_isaggr:1; /* is an aggregate */
u8 bfs_isampdu:1; /* is an a-mpdu, aggregate or not */
u8 bfs_ht:1; /* is an HT frame */
u8 bfs_isretried:1; /* is retried */
u8 bfs_isxretried:1; /* is excessive retried */
u8 bfs_shpreamble:1; /* is short preamble */
u8 bfs_isbar:1; /* is a BAR */
u8 bfs_ispspoll:1; /* is a PS-Poll */
u8 bfs_aggrburst:1; /* is a aggr burst */
u8 bfs_calcairtime:1; /* requests airtime be calculated
when set for tx frame */
int bfs_rifsburst_elem; /* RIFS burst/bar */
int bfs_nrifsubframes; /* # of elements in burst */
u32 bf_type; /* BUF_* (enum buffer_type) */
/* key type use to encrypt this frame */
enum ath9k_key_type bfs_keytype;
};
@ -224,26 +220,22 @@ struct ath_buf_state {
#define bf_seqno bf_state.bfs_seqno
#define bf_tidno bf_state.bfs_tidno
#define bf_rcs bf_state.bfs_rcs
#define bf_isdata bf_state.bfs_isdata
#define bf_isaggr bf_state.bfs_isaggr
#define bf_isampdu bf_state.bfs_isampdu
#define bf_ht bf_state.bfs_ht
#define bf_isretried bf_state.bfs_isretried
#define bf_isxretried bf_state.bfs_isxretried
#define bf_shpreamble bf_state.bfs_shpreamble
#define bf_rifsburst_elem bf_state.bfs_rifsburst_elem
#define bf_nrifsubframes bf_state.bfs_nrifsubframes
#define bf_keytype bf_state.bfs_keytype
#define bf_isbar bf_state.bfs_isbar
#define bf_ispspoll bf_state.bfs_ispspoll
#define bf_aggrburst bf_state.bfs_aggrburst
#define bf_calcairtime bf_state.bfs_calcairtime
#define bf_isdata(bf) (bf->bf_state.bf_type & BUF_DATA)
#define bf_isaggr(bf) (bf->bf_state.bf_type & BUF_AGGR)
#define bf_isampdu(bf) (bf->bf_state.bf_type & BUF_AMPDU)
#define bf_isht(bf) (bf->bf_state.bf_type & BUF_HT)
#define bf_isretried(bf) (bf->bf_state.bf_type & BUF_RETRY)
#define bf_isxretried(bf) (bf->bf_state.bf_type & BUF_XRETRY)
#define bf_isshpreamble(bf) (bf->bf_state.bf_type & BUF_SHORT_PREAMBLE)
#define bf_isbar(bf) (bf->bf_state.bf_type & BUF_BAR)
#define bf_ispspoll(bf) (bf->bf_state.bf_type & BUF_PSPOLL)
#define bf_isaggrburst(bf) (bf->bf_state.bf_type & BUF_AGGR_BURST)
/*
* Abstraction of a contiguous buffer to transmit/receive. There is only
* a single hw descriptor encapsulated here.
*/
struct ath_buf {
struct list_head list;
struct list_head *last;

86
drivers/net/wireless/ath9k/xmit.c
View File

@ -518,7 +518,7 @@ static void ath_tx_complete_buf(struct ath_softc *sc,
if (!txok) {
tx_status.flags |= ATH_TX_ERROR;
if (bf->bf_isxretried)
if (bf_isxretried(bf))
tx_status.flags |= ATH_TX_XRETRY;
}
/* Unmap this frame */
@ -629,7 +629,7 @@ static int ath_tx_num_badfrms(struct ath_softc *sc,
if (isnodegone || ds->ds_txstat.ts_flags == ATH9K_TX_SW_ABORTED)
return 0;
isaggr = bf->bf_isaggr;
isaggr = bf_isaggr(bf);
if (isaggr) {
seq_st = ATH_DS_BA_SEQ(ds);
memcpy(ba, ATH_DS_BA_BITMAP(ds), WME_BA_BMP_SIZE >> 3);
@ -651,7 +651,7 @@ static void ath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf)
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
bf->bf_isretried = 1;
bf->bf_state.bf_type |= BUF_RETRY;
bf->bf_retries++;
skb = bf->bf_mpdu;
@ -698,7 +698,7 @@ static u32 ath_pkt_duration(struct ath_softc *sc,
u8 rc;
int streams, pktlen;
pktlen = bf->bf_isaggr ? bf->bf_al : bf->bf_frmlen;
pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen;
rc = rt->info[rix].rateCode;
/*
@ -781,7 +781,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
* let rate series flags determine which rates will actually
* use RTS.
*/
if ((ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) && bf->bf_isdata) {
if ((ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) && bf_isdata(bf)) {
BUG_ON(!an);
/*
* 802.11g protection not needed, use our default behavior
@ -793,7 +793,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
* and the second aggregate should have any protection at all.
*/
if (an->an_smmode == ATH_SM_PWRSAV_DYNAMIC) {
if (!bf->bf_aggrburst) {
if (!bf_isaggrburst(bf)) {
flags = ATH9K_TXDESC_RTSENA;
dynamic_mimops = 1;
} else {
@ -806,7 +806,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
* Set protection if aggregate protection on
*/
if (sc->sc_config.ath_aggr_prot &&
(!bf->bf_isaggr || (bf->bf_isaggr && bf->bf_al < 8192))) {
(!bf_isaggr(bf) || (bf_isaggr(bf) && bf->bf_al < 8192))) {
flags = ATH9K_TXDESC_RTSENA;
cix = rt->info[sc->sc_protrix].controlRate;
rtsctsena = 1;
@ -815,7 +815,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
/*
* For AR5416 - RTS cannot be followed by a frame larger than 8K.
*/
if (bf->bf_isaggr && (bf->bf_al > aggr_limit_with_rts)) {
if (bf_isaggr(bf) && (bf->bf_al > aggr_limit_with_rts)) {
/*
* Ensure that in the case of SM Dynamic power save
* while we are bursting the second aggregate the
@ -832,7 +832,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
/* NB: cix is set above where RTS/CTS is enabled */
BUG_ON(cix == 0xff);
ctsrate = rt->info[cix].rateCode |
(bf->bf_shpreamble ? rt->info[cix].shortPreamble : 0);
(bf_isshpreamble(bf) ? rt->info[cix].shortPreamble : 0);
/*
* Setup HAL rate series
@ -846,7 +846,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
rix = bf->bf_rcs[i].rix;
series[i].Rate = rt->info[rix].rateCode |
(bf->bf_shpreamble ? rt->info[rix].shortPreamble : 0);
(bf_isshpreamble(bf) ? rt->info[rix].shortPreamble : 0);
series[i].Tries = bf->bf_rcs[i].tries;
@ -862,7 +862,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
sc, rix, bf,
(bf->bf_rcs[i].flags & ATH_RC_CW40_FLAG) != 0,
(bf->bf_rcs[i].flags & ATH_RC_SGI_FLAG),
bf->bf_shpreamble);
bf_isshpreamble(bf));
if ((an->an_smmode == ATH_SM_PWRSAV_STATIC) &&
(bf->bf_rcs[i].flags & ATH_RC_DS_FLAG) == 0) {
@ -875,7 +875,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
*/
series[i].ChSel = sc->sc_tx_chainmask;
} else {
if (bf->bf_ht)
if (bf_isht(bf))
series[i].ChSel =
ath_chainmask_sel_logic(sc, an);
else
@ -908,7 +908,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
* use the precalculated ACK durations.
*/
if (flags & ATH9K_TXDESC_RTSENA) { /* SIFS + CTS */
ctsduration += bf->bf_shpreamble ?
ctsduration += bf_isshpreamble(bf) ?
rt->info[cix].spAckDuration :
rt->info[cix].lpAckDuration;
}
@ -916,7 +916,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
ctsduration += series[0].PktDuration;
if ((bf->bf_flags & ATH9K_TXDESC_NOACK) == 0) { /* SIFS + ACK */
ctsduration += bf->bf_shpreamble ?
ctsduration += bf_isshpreamble(bf) ?
rt->info[rix].spAckDuration :
rt->info[rix].lpAckDuration;
}
@ -932,7 +932,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
* set dur_update_en for l-sig computation except for PS-Poll frames
*/
ath9k_hw_set11n_ratescenario(ah, ds, lastds,
!bf->bf_ispspoll,
!bf_ispspoll(bf),
ctsrate,
ctsduration,
series, 4, flags);
@ -958,7 +958,7 @@ static int ath_tx_send_normal(struct ath_softc *sc,
BUG_ON(list_empty(bf_head));
bf = list_first_entry(bf_head, struct ath_buf, list);
bf->bf_isampdu = 0; /* regular HT frame */
bf->bf_state.bf_type &= ~BUF_AMPDU; /* regular HT frame */
skb = (struct sk_buff *)bf->bf_mpdu;
tx_info = IEEE80211_SKB_CB(skb);
@ -998,7 +998,7 @@ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
while (!list_empty(&tid->buf_q)) {
bf = list_first_entry(&tid->buf_q, struct ath_buf, list);
ASSERT(!bf->bf_isretried);
ASSERT(!bf_isretried(bf));
list_cut_position(&bf_head, &tid->buf_q, &bf->bf_lastfrm->list);
ath_tx_send_normal(sc, txq, tid, &bf_head);
}
@ -1025,7 +1025,7 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
int isaggr, txfail, txpending, sendbar = 0, needreset = 0;
int isnodegone = (an->an_flags & ATH_NODE_CLEAN);
isaggr = bf->bf_isaggr;
isaggr = bf_isaggr(bf);
if (isaggr) {
if (txok) {
if (ATH_DS_TX_BA(ds)) {
@ -1075,7 +1075,7 @@ static void ath_tx_complete_aggr_rifs(struct ath_softc *sc,
ath_tx_set_retry(sc, bf);
txpending = 1;
} else {
bf->bf_isxretried = 1;
bf->bf_state.bf_type |= BUF_XRETRY;
txfail = 1;
sendbar = 1;
}
@ -1331,7 +1331,7 @@ static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
txq->axq_depth--;
if (bf->bf_isaggr)
if (bf_isaggr(bf))
txq->axq_aggr_depth--;
txok = (ds->ds_txstat.ts_status == 0);
@ -1345,14 +1345,14 @@ static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
spin_unlock_bh(&sc->sc_txbuflock);
}
if (!bf->bf_isampdu) {
if (!bf_isampdu(bf)) {
/*
* This frame is sent out as a single frame.
* Use hardware retry status for this frame.
*/
bf->bf_retries = ds->ds_txstat.ts_longretry;
if (ds->ds_txstat.ts_status & ATH9K_TXERR_XRETRY)
bf->bf_isxretried = 1;
bf->bf_state.bf_type |= BUF_XRETRY;
nbad = 0;
} else {
nbad = ath_tx_num_badfrms(sc, bf, txok);
@ -1368,7 +1368,7 @@ static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
if (ds->ds_txstat.ts_status == 0)
nacked++;
if (bf->bf_isdata) {
if (bf_isdata(bf)) {
if (isrifs)
tmp_ds = bf->bf_rifslast->bf_desc;
else
@ -1384,7 +1384,7 @@ static int ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
/*
* Complete this transmit unit
*/
if (bf->bf_isampdu)
if (bf_isampdu(bf))
ath_tx_complete_aggr_rifs(sc, txq, bf, &bf_head, txok);
else
ath_tx_complete_buf(sc, bf, &bf_head, txok, 0);
@ -1481,7 +1481,7 @@ static void ath_tx_addto_baw(struct ath_softc *sc,
{
int index, cindex;
if (bf->bf_isretried)
if (bf_isretried(bf))
return;
index = ATH_BA_INDEX(tid->seq_start, bf->bf_seqno);
@ -1516,7 +1516,7 @@ static int ath_tx_send_ampdu(struct ath_softc *sc,
BUG_ON(list_empty(bf_head));
bf = list_first_entry(bf_head, struct ath_buf, list);
bf->bf_isampdu = 1;
bf->bf_state.bf_type |= BUF_AMPDU;
bf->bf_seqno = txctl->seqno; /* save seqno and tidno in buffer */
bf->bf_tidno = txctl->tidno;
@ -1860,7 +1860,7 @@ static void ath_tx_sched_aggr(struct ath_softc *sc,
if (bf->bf_nframes == 1) {
ASSERT(bf->bf_lastfrm == bf_last);
bf->bf_isaggr = 0;
bf->bf_state.bf_type &= ~BUF_AGGR;
/*
* clear aggr bits for every descriptor
* XXX TODO: is there a way to optimize it?
@ -1877,7 +1877,7 @@ static void ath_tx_sched_aggr(struct ath_softc *sc,
/*
* setup first desc with rate and aggr info
*/
bf->bf_isaggr = 1;
bf->bf_state.bf_type |= BUF_AGGR;
ath_buf_set_rate(sc, bf);
ath9k_hw_set11n_aggr_first(sc->sc_ah, bf->bf_desc, bf->bf_al);
@ -1925,7 +1925,7 @@ static void ath_tid_drain(struct ath_softc *sc,
list_cut_position(&bf_head, &tid->buf_q, &bf->bf_lastfrm->list);
/* update baw for software retried frame */
if (bf->bf_isretried)
if (bf_isretried(bf))
ath_tx_update_baw(sc, tid, bf->bf_seqno);
/*
@ -2014,11 +2014,21 @@ static int ath_tx_start_dma(struct ath_softc *sc,
/* set up this buffer */
ATH_TXBUF_RESET(bf);
bf->bf_frmlen = txctl->frmlen;
bf->bf_isdata = ieee80211_is_data(fc);
bf->bf_isbar = ieee80211_is_back_req(fc);
bf->bf_ispspoll = ieee80211_is_pspoll(fc);
ieee80211_is_data(fc) ?
(bf->bf_state.bf_type |= BUF_DATA) :
(bf->bf_state.bf_type &= ~BUF_DATA);
ieee80211_is_back_req(fc) ?
(bf->bf_state.bf_type |= BUF_BAR) :
(bf->bf_state.bf_type &= ~BUF_BAR);
ieee80211_is_pspoll(fc) ?
(bf->bf_state.bf_type |= BUF_PSPOLL) :
(bf->bf_state.bf_type &= ~BUF_PSPOLL);
(sc->sc_flags & ATH_PREAMBLE_SHORT) ?
(bf->bf_state.bf_type |= BUF_SHORT_PREAMBLE) :
(bf->bf_state.bf_type &= ~BUF_SHORT_PREAMBLE);
bf->bf_flags = txctl->flags;
bf->bf_shpreamble = sc->sc_flags & ATH_PREAMBLE_SHORT;
bf->bf_keytype = txctl->keytype;
tx_info_priv = (struct ath_tx_info_priv *)tx_info->driver_data[0];
rcs = tx_info_priv->rcs;
@ -2060,7 +2070,9 @@ static int ath_tx_start_dma(struct ath_softc *sc,
ds); /* first descriptor */
bf->bf_lastfrm = bf;
bf->bf_ht = txctl->ht;
(txctl->ht) ?
(bf->bf_state.bf_type |= BUF_HT) :
(bf->bf_state.bf_type &= ~BUF_HT);
spin_lock_bh(&txq->axq_lock);
@ -2162,7 +2174,7 @@ int ath_tx_init(struct ath_softc *sc, int nbufs)
/* Setup tx descriptors */
error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf,
"tx", nbufs * ATH_FRAG_PER_MSDU, ATH_TXDESC);
"tx", nbufs * ATH_FRAG_PER_MSDU, 1);
if (error != 0) {
DPRINTF(sc, ATH_DBG_FATAL,
"%s: failed to allocate tx descriptors: %d\n",
@ -2486,7 +2498,7 @@ void ath_tx_draintxq(struct ath_softc *sc,
spin_unlock_bh(&txq->axq_lock);
if (bf->bf_isampdu)
if (bf_isampdu(bf))
ath_tx_complete_aggr_rifs(sc, txq, bf, &bf_head, 0);
else
ath_tx_complete_buf(sc, bf, &bf_head, 0, 0);
@ -2647,7 +2659,7 @@ void ath_tx_aggr_teardown(struct ath_softc *sc,
spin_lock_bh(&txq->axq_lock);
while (!list_empty(&txtid->buf_q)) {
bf = list_first_entry(&txtid->buf_q, struct ath_buf, list);
if (!bf->bf_isretried) {
if (!bf_isretried(bf)) {
/*
* NB: it's based on the assumption that
* software retried frame will always stay