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ath9k: Remove ath9k_rate_table

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Maintaining two sets of rate tables is redundant, remove one
and use struct ath_rate_table exclusively.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith 2008-11-18 09:07:53 +05:30 committed by John W. Linville
parent a8efee4f47
commit e63835b0f4
10 changed files with 132 additions and 374 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/net/wireless/ath9k/ath9k.h
View File

@ -401,22 +401,6 @@ enum ath9k_int {
ATH9K_INT_NOCARD = 0xffffffff
};
struct ath9k_rate_table {
int rateCount;
u8 rateCodeToIndex[256];
struct {
u8 valid;
u8 phy;
u32 rateKbps;
u8 rateCode;
u8 shortPreamble;
u8 dot11Rate;
u8 controlRate;
u16 lpAckDuration;
u16 spAckDuration;
} info[32];
};
#define ATH9K_RATESERIES_RTS_CTS 0x0001
#define ATH9K_RATESERIES_2040 0x0002
#define ATH9K_RATESERIES_HALFGI 0x0004
@ -828,6 +812,8 @@ struct chan_centers {
u16 ext_center;
};
struct ath_rate_table;
/* Helpers */
enum wireless_mode ath9k_hw_chan2wmode(struct ath_hal *ah,
@ -838,7 +824,7 @@ bool ath9k_get_channel_edges(struct ath_hal *ah,
u16 flags, u16 *low,
u16 *high);
u16 ath9k_hw_computetxtime(struct ath_hal *ah,
const struct ath9k_rate_table *rates,
struct ath_rate_table *rates,
u32 frameLen, u16 rateix,
bool shortPreamble);
u32 ath9k_hw_mhz2ieee(struct ath_hal *ah, u32 freq, u32 flags);
@ -883,12 +869,6 @@ void ath9k_hw_configpcipowersave(struct ath_hal *ah, int restore);
void ath9k_hw_beaconinit(struct ath_hal *ah, u32 next_beacon, u32 beacon_period);
void ath9k_hw_set_sta_beacon_timers(struct ath_hal *ah,
const struct ath9k_beacon_state *bs);
/* Rate table */
const struct ath9k_rate_table *ath9k_hw_getratetable(struct ath_hal *ah,
u32 mode);
/* HW Capabilities */
bool ath9k_hw_fill_cap_info(struct ath_hal *ah);

8
drivers/net/wireless/ath9k/beacon.c
View File

@ -68,7 +68,7 @@ static void ath_beacon_setup(struct ath_softc *sc,
struct ath_hal *ah = sc->sc_ah;
struct ath_desc *ds;
struct ath9k_11n_rate_series series[4];
const struct ath9k_rate_table *rt;
struct ath_rate_table *rt;
int flags, antenna;
u8 rix, rate;
int ctsrate = 0;
@ -106,10 +106,10 @@ static void ath_beacon_setup(struct ath_softc *sc,
* XXX everything at min xmit rate
*/
rix = 0;
rt = sc->sc_currates;
rate = rt->info[rix].rateCode;
rt = sc->hw_rate_table[sc->sc_curmode];
rate = rt->info[rix].ratecode;
if (sc->sc_flags & SC_OP_PREAMBLE_SHORT)
rate |= rt->info[rix].shortPreamble;
rate |= rt->info[rix].short_preamble;
ath9k_hw_set11n_txdesc(ah, ds,
skb->len + FCS_LEN, /* frame length */

52
drivers/net/wireless/ath9k/core.c
View File

@ -80,38 +80,9 @@ static u8 parse_mpdudensity(u8 mpdudensity)
/*
* Set current operating mode
*
* This function initializes and fills the rate table in the ATH object based
* on the operating mode.
*/
static void ath_setcurmode(struct ath_softc *sc, enum wireless_mode mode)
{
const struct ath9k_rate_table *rt;
int i;
rt = ath9k_hw_getratetable(sc->sc_ah, mode);
BUG_ON(!rt);
memset(sc->sc_hwmap, 0, sizeof(sc->sc_hwmap));
for (i = 0; i < 256; i++) {
u8 ix = rt->rateCodeToIndex[i];
if (ix == 0xff)
continue;
sc->sc_hwmap[i].ieeerate =
rt->info[ix].dot11Rate & IEEE80211_RATE_VAL;
sc->sc_hwmap[i].rateKbps = rt->info[ix].rateKbps;
if (rt->info[ix].shortPreamble ||
rt->info[ix].phy == PHY_OFDM) {
/* XXX: Handle this */
}
/* NB: this uses the last entry if the rate isn't found */
/* XXX beware of overlow */
}
sc->sc_currates = rt;
sc->sc_curmode = mode;
/*
* All protection frames are transmited at 2Mb/s for
@ -126,37 +97,36 @@ static void ath_setcurmode(struct ath_softc *sc, enum wireless_mode mode)
*/
static void ath_setup_rates(struct ath_softc *sc, enum ieee80211_band band)
{
struct ath_hal *ah = sc->sc_ah;
const struct ath9k_rate_table *rt = NULL;
struct ath_rate_table *rate_table = NULL;
struct ieee80211_supported_band *sband;
struct ieee80211_rate *rate;
int i, maxrates;
switch (band) {
case IEEE80211_BAND_2GHZ:
rt = ath9k_hw_getratetable(ah, ATH9K_MODE_11G);
rate_table = sc->hw_rate_table[ATH9K_MODE_11G];
break;
case IEEE80211_BAND_5GHZ:
rt = ath9k_hw_getratetable(ah, ATH9K_MODE_11A);
rate_table = sc->hw_rate_table[ATH9K_MODE_11A];
break;
default:
break;
}
if (rt == NULL)
if (rate_table == NULL)
return;
sband = &sc->sbands[band];
rate = sc->rates[band];
if (rt->rateCount > ATH_RATE_MAX)
if (rate_table->rate_cnt > ATH_RATE_MAX)
maxrates = ATH_RATE_MAX;
else
maxrates = rt->rateCount;
maxrates = rate_table->rate_cnt;
for (i = 0; i < maxrates; i++) {
rate[i].bitrate = rt->info[i].rateKbps / 100;
rate[i].hw_value = rt->info[i].rateCode;
rate[i].bitrate = rate_table->info[i].ratekbps / 100;
rate[i].hw_value = rate_table->info[i].ratecode;
sband->n_bitrates++;
DPRINTF(sc, ATH_DBG_CONFIG,
"%s: Rate: %2dMbps, ratecode: %2d\n",
@ -1000,12 +970,10 @@ int ath_init(u16 devid, struct ath_softc *sc)
/* Setup rate tables */
ath_rate_attach(sc);
ath_setup_rates(sc, IEEE80211_BAND_2GHZ);
ath_setup_rates(sc, IEEE80211_BAND_5GHZ);
/* NB: setup here so ath_rate_update is happy */
ath_setcurmode(sc, ATH9K_MODE_11A);
/*
* Allocate hardware transmit queues: one queue for
* beacon frames and one data queue for each QoS
@ -1071,8 +1039,6 @@ int ath_init(u16 devid, struct ath_softc *sc)
sc->sc_ani.sc_noise_floor = ATH_DEFAULT_NOISE_FLOOR;
setup_timer(&sc->sc_ani.timer, ath_ani_calibrate, (unsigned long)sc);
ath_rate_attach(sc);
if (ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
ATH9K_CIPHER_TKIP, NULL)) {
/*

5
drivers/net/wireless/ath9k/core.h
View File

@ -858,12 +858,7 @@ struct ath_softc {
/* Rate */
struct ieee80211_rate rates[IEEE80211_NUM_BANDS][ATH_RATE_MAX];
struct ath_rate_table *hw_rate_table[ATH9K_MODE_MAX];
const struct ath9k_rate_table *sc_currates;
u8 sc_protrix; /* protection rate index */
struct {
u32 rateKbps; /* transfer rate in kbs */
u8 ieeerate; /* IEEE rate */
} sc_hwmap[256]; /* h/w rate ix mappings */
/* Channel, Band */
struct ieee80211_channel channels[IEEE80211_NUM_BANDS][ATH_CHAN_MAX];

190
drivers/net/wireless/ath9k/hw.c
View File

@ -142,14 +142,14 @@ bool ath9k_get_channel_edges(struct ath_hal *ah,
}
u16 ath9k_hw_computetxtime(struct ath_hal *ah,
const struct ath9k_rate_table *rates,
struct ath_rate_table *rates,
u32 frameLen, u16 rateix,
bool shortPreamble)
{
u32 bitsPerSymbol, numBits, numSymbols, phyTime, txTime;
u32 kbps;
kbps = rates->info[rateix].rateKbps;
kbps = rates->info[rateix].ratekbps;
if (kbps == 0)
return 0;
@ -157,7 +157,7 @@ u16 ath9k_hw_computetxtime(struct ath_hal *ah,
switch (rates->info[rateix].phy) {
case PHY_CCK:
phyTime = CCK_PREAMBLE_BITS + CCK_PLCP_BITS;
if (shortPreamble && rates->info[rateix].shortPreamble)
if (shortPreamble && rates->info[rateix].short_preamble)
phyTime >>= 1;
numBits = frameLen << 3;
txTime = CCK_SIFS_TIME + phyTime + ((numBits * 1000) / kbps);
@ -3190,190 +3190,6 @@ void ath9k_hw_set_sta_beacon_timers(struct ath_hal *ah,
}
/***************/
/* Rate tables */
/***************/
static struct ath9k_rate_table ar5416_11a_table = {
8,
{0},
{
{true, PHY_OFDM, 6000, 0x0b, 0x00, (0x80 | 12), 0},
{true, PHY_OFDM, 9000, 0x0f, 0x00, 18, 0},
{true, PHY_OFDM, 12000, 0x0a, 0x00, (0x80 | 24), 2},
{true, PHY_OFDM, 18000, 0x0e, 0x00, 36, 2},
{true, PHY_OFDM, 24000, 0x09, 0x00, (0x80 | 48), 4},
{true, PHY_OFDM, 36000, 0x0d, 0x00, 72, 4},
{true, PHY_OFDM, 48000, 0x08, 0x00, 96, 4},
{true, PHY_OFDM, 54000, 0x0c, 0x00, 108, 4}
},
};
static struct ath9k_rate_table ar5416_11b_table = {
4,
{0},
{
{true, PHY_CCK, 1000, 0x1b, 0x00, (0x80 | 2), 0},
{true, PHY_CCK, 2000, 0x1a, 0x04, (0x80 | 4), 1},
{true, PHY_CCK, 5500, 0x19, 0x04, (0x80 | 11), 1},
{true, PHY_CCK, 11000, 0x18, 0x04, (0x80 | 22), 1}
},
};
static struct ath9k_rate_table ar5416_11g_table = {
12,
{0},
{
{true, PHY_CCK, 1000, 0x1b, 0x00, (0x80 | 2), 0},
{true, PHY_CCK, 2000, 0x1a, 0x04, (0x80 | 4), 1},
{true, PHY_CCK, 5500, 0x19, 0x04, (0x80 | 11), 2},
{true, PHY_CCK, 11000, 0x18, 0x04, (0x80 | 22), 3},
{false, PHY_OFDM, 6000, 0x0b, 0x00, 12, 4},
{false, PHY_OFDM, 9000, 0x0f, 0x00, 18, 4},
{true, PHY_OFDM, 12000, 0x0a, 0x00, 24, 6},
{true, PHY_OFDM, 18000, 0x0e, 0x00, 36, 6},
{true, PHY_OFDM, 24000, 0x09, 0x00, 48, 8},
{true, PHY_OFDM, 36000, 0x0d, 0x00, 72, 8},
{true, PHY_OFDM, 48000, 0x08, 0x00, 96, 8},
{true, PHY_OFDM, 54000, 0x0c, 0x00, 108, 8}
},
};
static struct ath9k_rate_table ar5416_11ng_table = {
28,
{0},
{
{true, PHY_CCK, 1000, 0x1b, 0x00, (0x80 | 2), 0},
{true, PHY_CCK, 2000, 0x1a, 0x04, (0x80 | 4), 1},
{true, PHY_CCK, 5500, 0x19, 0x04, (0x80 | 11), 2},
{true, PHY_CCK, 11000, 0x18, 0x04, (0x80 | 22), 3},
{false, PHY_OFDM, 6000, 0x0b, 0x00, 12, 4},
{false, PHY_OFDM, 9000, 0x0f, 0x00, 18, 4},
{true, PHY_OFDM, 12000, 0x0a, 0x00, 24, 6},
{true, PHY_OFDM, 18000, 0x0e, 0x00, 36, 6},
{true, PHY_OFDM, 24000, 0x09, 0x00, 48, 8},
{true, PHY_OFDM, 36000, 0x0d, 0x00, 72, 8},
{true, PHY_OFDM, 48000, 0x08, 0x00, 96, 8},
{true, PHY_OFDM, 54000, 0x0c, 0x00, 108, 8},
{true, PHY_HT, 6500, 0x80, 0x00, 0, 4},
{true, PHY_HT, 13000, 0x81, 0x00, 1, 6},
{true, PHY_HT, 19500, 0x82, 0x00, 2, 6},
{true, PHY_HT, 26000, 0x83, 0x00, 3, 8},
{true, PHY_HT, 39000, 0x84, 0x00, 4, 8},
{true, PHY_HT, 52000, 0x85, 0x00, 5, 8},
{true, PHY_HT, 58500, 0x86, 0x00, 6, 8},
{true, PHY_HT, 65000, 0x87, 0x00, 7, 8},
{true, PHY_HT, 13000, 0x88, 0x00, 8, 4},
{true, PHY_HT, 26000, 0x89, 0x00, 9, 6},
{true, PHY_HT, 39000, 0x8a, 0x00, 10, 6},
{true, PHY_HT, 52000, 0x8b, 0x00, 11, 8},
{true, PHY_HT, 78000, 0x8c, 0x00, 12, 8},
{true, PHY_HT, 104000, 0x8d, 0x00, 13, 8},
{true, PHY_HT, 117000, 0x8e, 0x00, 14, 8},
{true, PHY_HT, 130000, 0x8f, 0x00, 15, 8},
},
};
static struct ath9k_rate_table ar5416_11na_table = {
24,
{0},
{
{true, PHY_OFDM, 6000, 0x0b, 0x00, (0x80 | 12), 0},
{true, PHY_OFDM, 9000, 0x0f, 0x00, 18, 0},
{true, PHY_OFDM, 12000, 0x0a, 0x00, (0x80 | 24), 2},
{true, PHY_OFDM, 18000, 0x0e, 0x00, 36, 2},
{true, PHY_OFDM, 24000, 0x09, 0x00, (0x80 | 48), 4},
{true, PHY_OFDM, 36000, 0x0d, 0x00, 72, 4},
{true, PHY_OFDM, 48000, 0x08, 0x00, 96, 4},
{true, PHY_OFDM, 54000, 0x0c, 0x00, 108, 4},
{true, PHY_HT, 6500, 0x80, 0x00, 0, 0},
{true, PHY_HT, 13000, 0x81, 0x00, 1, 2},
{true, PHY_HT, 19500, 0x82, 0x00, 2, 2},
{true, PHY_HT, 26000, 0x83, 0x00, 3, 4},
{true, PHY_HT, 39000, 0x84, 0x00, 4, 4},
{true, PHY_HT, 52000, 0x85, 0x00, 5, 4},
{true, PHY_HT, 58500, 0x86, 0x00, 6, 4},
{true, PHY_HT, 65000, 0x87, 0x00, 7, 4},
{true, PHY_HT, 13000, 0x88, 0x00, 8, 0},
{true, PHY_HT, 26000, 0x89, 0x00, 9, 2},
{true, PHY_HT, 39000, 0x8a, 0x00, 10, 2},
{true, PHY_HT, 52000, 0x8b, 0x00, 11, 4},
{true, PHY_HT, 78000, 0x8c, 0x00, 12, 4},
{true, PHY_HT, 104000, 0x8d, 0x00, 13, 4},
{true, PHY_HT, 117000, 0x8e, 0x00, 14, 4},
{true, PHY_HT, 130000, 0x8f, 0x00, 15, 4},
},
};
static void ath9k_hw_setup_rate_table(struct ath_hal *ah,
struct ath9k_rate_table *rt)
{
int i;
if (rt->rateCodeToIndex[0] != 0)
return;
for (i = 0; i < 256; i++)
rt->rateCodeToIndex[i] = (u8) -1;
for (i = 0; i < rt->rateCount; i++) {
u8 code = rt->info[i].rateCode;
u8 cix = rt->info[i].controlRate;
rt->rateCodeToIndex[code] = i;
rt->rateCodeToIndex[code | rt->info[i].shortPreamble] = i;
rt->info[i].lpAckDuration =
ath9k_hw_computetxtime(ah, rt,
WLAN_CTRL_FRAME_SIZE,
cix,
false);
rt->info[i].spAckDuration =
ath9k_hw_computetxtime(ah, rt,
WLAN_CTRL_FRAME_SIZE,
cix,
true);
}
}
const struct ath9k_rate_table *ath9k_hw_getratetable(struct ath_hal *ah,
u32 mode)
{
struct ath9k_rate_table *rt;
switch (mode) {
case ATH9K_MODE_11A:
rt = &ar5416_11a_table;
break;
case ATH9K_MODE_11B:
rt = &ar5416_11b_table;
break;
case ATH9K_MODE_11G:
rt = &ar5416_11g_table;
break;
case ATH9K_MODE_11NG_HT20:
case ATH9K_MODE_11NG_HT40PLUS:
case ATH9K_MODE_11NG_HT40MINUS:
rt = &ar5416_11ng_table;
break;
case ATH9K_MODE_11NA_HT20:
case ATH9K_MODE_11NA_HT40PLUS:
case ATH9K_MODE_11NA_HT40MINUS:
rt = &ar5416_11na_table;
break;
default:
DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL, "%s: invalid mode 0x%x\n",
__func__, mode);
return NULL;
}
ath9k_hw_setup_rate_table(ah, rt);
return rt;
}
/*******************/
/* HW Capabilities */
/*******************/

2
drivers/net/wireless/ath9k/main.c
View File

@ -780,6 +780,8 @@ static int ath_attach(u16 devid, struct ath_softc *sc)
BIT(NL80211_IFTYPE_ADHOC);
hw->queues = 4;
hw->max_rates = 4;
hw->max_rate_tries = ATH_11N_TXMAXTRY;
hw->sta_data_size = sizeof(struct ath_node);
hw->vif_data_size = sizeof(struct ath_vap);

51
drivers/net/wireless/ath9k/rc.c
View File

@ -25,6 +25,7 @@
static struct ath_rate_table ar5416_11na_ratetable = {
42,
{0},
{
{ TRUE, TRUE, WLAN_PHY_OFDM, 6000, /* 6 Mb */
5400, 0x0b, 0x00, 12,
@ -168,6 +169,7 @@ static struct ath_rate_table ar5416_11na_ratetable = {
static struct ath_rate_table ar5416_11ng_ratetable = {
46,
{0},
{
{ TRUE_ALL, TRUE_ALL, WLAN_PHY_CCK, 1000, /* 1 Mb */
900, 0x1b, 0x00, 2,
@ -315,6 +317,7 @@ static struct ath_rate_table ar5416_11ng_ratetable = {
static struct ath_rate_table ar5416_11a_ratetable = {
8,
{0},
{
{ TRUE, TRUE, WLAN_PHY_OFDM, 6000, /* 6 Mb */
5400, 0x0b, 0x00, (0x80|12),
@ -348,6 +351,7 @@ static struct ath_rate_table ar5416_11a_ratetable = {
static struct ath_rate_table ar5416_11g_ratetable = {
12,
{0},
{
{ TRUE, TRUE, WLAN_PHY_CCK, 1000, /* 1 Mb */
900, 0x1b, 0x00, 2,
@ -393,6 +397,7 @@ static struct ath_rate_table ar5416_11g_ratetable = {
static struct ath_rate_table ar5416_11b_ratetable = {
4,
{0},
{
{ TRUE, TRUE, WLAN_PHY_CCK, 1000, /* 1 Mb */
900, 0x1b, 0x00, (0x80|2),
@ -1302,14 +1307,14 @@ static void ath_rc_update(struct ath_softc *sc,
if (final_ts_idx != 0) {
/* Process intermediate rates that failed.*/
for (series = 0; series < final_ts_idx ; series++) {
if (rates[series].count != 0) {
if (rates[series].count != 0 && (rates[series].idx >= 0)) {
flags = rates[series].flags;
/* If HT40 and we have switched mode from
* 40 to 20 => don't update */
if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
(ath_rc_priv->rc_phy_mode !=
(flags & IEEE80211_TX_RC_40_MHZ_WIDTH)))
(ath_rc_priv->rc_phy_mode != WLAN_RC_40_FLAG))
return;
if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
(flags & IEEE80211_TX_RC_SHORT_GI))
rix = rate_table->info[
@ -1343,8 +1348,9 @@ static void ath_rc_update(struct ath_softc *sc,
flags = rates[series].flags;
/* If HT40 and we have switched mode from 40 to 20 => don't update */
if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
(ath_rc_priv->rc_phy_mode != (flags & IEEE80211_TX_RC_40_MHZ_WIDTH)))
(ath_rc_priv->rc_phy_mode != WLAN_RC_40_FLAG)) {
return;
}
if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && (flags & IEEE80211_TX_RC_SHORT_GI))
rix = rate_table->info[rates[series].idx].ht_index;
@ -1628,7 +1634,6 @@ static void ath_rate_free_sta(void *priv, struct ieee80211_sta *sta,
void *priv_sta)
{
struct ath_rate_node *rate_priv = priv_sta;
kfree(rate_priv);
}
@ -1644,6 +1649,35 @@ static struct rate_control_ops ath_rate_ops = {
.free_sta = ath_rate_free_sta,
};
static void ath_setup_rate_table(struct ath_softc *sc,
struct ath_rate_table *rate_table)
{
int i;
for (i = 0; i < 256; i++)
rate_table->rateCodeToIndex[i] = (u8)-1;
for (i = 0; i < rate_table->rate_cnt; i++) {
u8 code = rate_table->info[i].ratecode;
u8 cix = rate_table->info[i].ctrl_rate;
u8 sh = rate_table->info[i].short_preamble;
rate_table->rateCodeToIndex[code] = i;
rate_table->rateCodeToIndex[code | sh] = i;
rate_table->info[i].lpAckDuration =
ath9k_hw_computetxtime(sc->sc_ah, rate_table,
WLAN_CTRL_FRAME_SIZE,
cix,
false);
rate_table->info[i].spAckDuration =
ath9k_hw_computetxtime(sc->sc_ah, rate_table,
WLAN_CTRL_FRAME_SIZE,
cix,
true);
}
}
void ath_rate_attach(struct ath_softc *sc)
{
sc->hw_rate_table[ATH9K_MODE_11B] =
@ -1664,6 +1698,12 @@ void ath_rate_attach(struct ath_softc *sc)
&ar5416_11ng_ratetable;
sc->hw_rate_table[ATH9K_MODE_11NG_HT40MINUS] =
&ar5416_11ng_ratetable;
ath_setup_rate_table(sc, &ar5416_11b_ratetable);
ath_setup_rate_table(sc, &ar5416_11a_ratetable);
ath_setup_rate_table(sc, &ar5416_11g_ratetable);
ath_setup_rate_table(sc, &ar5416_11na_ratetable);
ath_setup_rate_table(sc, &ar5416_11ng_ratetable);
}
int ath_rate_control_register(void)
@ -1675,4 +1715,3 @@ void ath_rate_control_unregister(void)
{
ieee80211_rate_control_unregister(&ath_rate_ops);
}

3
drivers/net/wireless/ath9k/rc.h
View File

@ -143,6 +143,7 @@ enum {
*/
struct ath_rate_table {
int rate_cnt;
u8 rateCodeToIndex[256];
struct {
int valid;
int valid_single_stream;
@ -160,6 +161,8 @@ struct ath_rate_table {
u8 sgi_index;
u8 ht_index;
u32 max_4ms_framelen;
u16 lpAckDuration;
u16 spAckDuration;
} info[RATE_TABLE_SIZE];
u32 probe_interval;
u32 rssi_reduce_interval;

6
drivers/net/wireless/ath9k/recv.c
View File

@ -140,8 +140,9 @@ static int ath_rx_prepare(struct sk_buff *skb, struct ath_desc *ds,
struct ieee80211_rx_status *rx_status, bool *decrypt_error,
struct ath_softc *sc)
{
struct ath_rate_table *rate_table = sc->hw_rate_table[sc->sc_curmode];
struct ieee80211_hdr *hdr;
int ratekbps;
int ratekbps, rix;
u8 ratecode;
__le16 fc;
@ -196,7 +197,8 @@ static int ath_rx_prepare(struct sk_buff *skb, struct ath_desc *ds,
}
ratecode = ds->ds_rxstat.rs_rate;
ratekbps = sc->sc_hwmap[ratecode].rateKbps;
rix = rate_table->rateCodeToIndex[ratecode];
ratekbps = rate_table->info[rix].ratekbps;
/* HT rate */
if (ratecode & 0x80) {

163
drivers/net/wireless/ath9k/xmit.c
View File

@ -176,25 +176,6 @@ static int get_hw_crypto_keytype(struct sk_buff *skb)
return ATH9K_KEY_TYPE_CLEAR;
}
static void setup_rate_retries(struct ath_softc *sc, struct sk_buff *skb)
{
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_tx_rate *rates = tx_info->control.rates;
struct ieee80211_hdr *hdr;
__le16 fc;
hdr = (struct ieee80211_hdr *)skb->data;
fc = hdr->frame_control;
if (ieee80211_has_morefrags(fc) ||
(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
rates[1].count = rates[2].count = rates[3].count = 0;
rates[1].idx = rates[2].idx = rates[3].idx = 0;
/* reset tries but keep rate index */
rates[0].count = ATH_TXMAXTRY;
}
}
/* Called only when tx aggregation is enabled and HT is supported */
static void assign_aggr_tid_seqno(struct sk_buff *skb,
@ -468,27 +449,23 @@ static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid,
* width - 0 for 20 MHz, 1 for 40 MHz
* half_gi - to use 4us v/s 3.6 us for symbol time
*/
static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf,
int width, int half_gi, bool shortPreamble)
{
const struct ath9k_rate_table *rt = sc->sc_currates;
struct ath_rate_table *rate_table = sc->hw_rate_table[sc->sc_curmode];
u32 nbits, nsymbits, duration, nsymbols;
u8 rc;
int streams, pktlen;
pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen;
rc = rt->info[rix].rateCode;
rc = rate_table->info[rix].ratecode;
/*
* for legacy rates, use old function to compute packet duration
*/
/* for legacy rates, use old function to compute packet duration */
if (!IS_HT_RATE(rc))
return ath9k_hw_computetxtime(sc->sc_ah, rt, pktlen, rix,
shortPreamble);
/*
* find number of symbols: PLCP + data
*/
return ath9k_hw_computetxtime(sc->sc_ah, rate_table, pktlen,
rix, shortPreamble);
/* find number of symbols: PLCP + data */
nbits = (pktlen << 3) + OFDM_PLCP_BITS;
nsymbits = bits_per_symbol[HT_RC_2_MCS(rc)][width];
nsymbols = (nbits + nsymbits - 1) / nsymbits;
@ -498,9 +475,7 @@ static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf,
else
duration = SYMBOL_TIME_HALFGI(nsymbols);
/*
* addup duration for legacy/ht training and signal fields
*/
/* addup duration for legacy/ht training and signal fields */
streams = HT_RC_2_STREAMS(rc);
duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams);
@ -512,114 +487,104 @@ static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf,
static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
{
struct ath_hal *ah = sc->sc_ah;
const struct ath9k_rate_table *rt;
struct ath_rate_table *rt;
struct ath_desc *ds = bf->bf_desc;
struct ath_desc *lastds = bf->bf_lastbf->bf_desc;
struct ath9k_11n_rate_series series[4];
int i, flags, rtsctsena = 0;
u32 ctsduration = 0;
u8 rix = 0, cix, ctsrate = 0;
struct ath_node *an = NULL;
struct sk_buff *skb;
struct ieee80211_tx_info *tx_info;
struct ieee80211_tx_rate *rates;
struct ieee80211_hdr *hdr;
int i, flags, rtsctsena = 0;
u32 ctsduration = 0;
u8 rix = 0, cix, ctsrate = 0;
__le16 fc;
memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
skb = (struct sk_buff *)bf->bf_mpdu;
hdr = (struct ieee80211_hdr *)skb->data;
fc = hdr->frame_control;
tx_info = IEEE80211_SKB_CB(skb);
rates = tx_info->rate_driver_data[0];
rates = tx_info->control.rates;
if (tx_info->control.sta)
an = (struct ath_node *)tx_info->control.sta->drv_priv;
/*
* get the cix for the lowest valid rix.
*/
rt = sc->sc_currates;
if (ieee80211_has_morefrags(fc) ||
(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
rates[1].count = rates[2].count = rates[3].count = 0;
rates[1].idx = rates[2].idx = rates[3].idx = 0;
rates[0].count = ATH_TXMAXTRY;
}
/* get the cix for the lowest valid rix */
rt = sc->hw_rate_table[sc->sc_curmode];
for (i = 3; i >= 0; i--) {
if (rates[i].count) {
if (rates[i].count && (rates[i].idx >= 0)) {
rix = rates[i].idx;
break;
}
}
flags = (bf->bf_flags & (ATH9K_TXDESC_RTSENA | ATH9K_TXDESC_CTSENA));
cix = rt->info[rix].controlRate;
cix = rt->info[rix].ctrl_rate;
/*
* If 802.11g protection is enabled, determine whether
* to use RTS/CTS or just CTS. Note that this is only
* done for OFDM/HT unicast frames.
* If 802.11g protection is enabled, determine whether to use RTS/CTS or
* just CTS. Note that this is only done for OFDM/HT unicast frames.
*/
if (sc->sc_protmode != PROT_M_NONE &&
(rt->info[rix].phy == PHY_OFDM ||
rt->info[rix].phy == PHY_HT) &&
(bf->bf_flags & ATH9K_TXDESC_NOACK) == 0) {
if (sc->sc_protmode != PROT_M_NONE && !(bf->bf_flags & ATH9K_TXDESC_NOACK)
&& (rt->info[rix].phy == WLAN_PHY_OFDM ||
WLAN_RC_PHY_HT(rt->info[rix].phy))) {
if (sc->sc_protmode == PROT_M_RTSCTS)
flags = ATH9K_TXDESC_RTSENA;
else if (sc->sc_protmode == PROT_M_CTSONLY)
flags = ATH9K_TXDESC_CTSENA;
cix = rt->info[sc->sc_protrix].controlRate;
cix = rt->info[sc->sc_protrix].ctrl_rate;
rtsctsena = 1;
}
/* For 11n, the default behavior is to enable RTS for
* hw retried frames. We enable the global flag here and
* let rate series flags determine which rates will actually
* use RTS.
/* For 11n, the default behavior is to enable RTS for hw retried frames.
* We enable the global flag here and let rate series flags determine
* which rates will actually use RTS.
*/
if ((ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) && bf_isdata(bf)) {
/*
* 802.11g protection not needed, use our default behavior
*/
/* 802.11g protection not needed, use our default behavior */
if (!rtsctsena)
flags = ATH9K_TXDESC_RTSENA;
}
/*
* Set protection if aggregate protection on
*/
/* Set protection if aggregate protection on */
if (sc->sc_config.ath_aggr_prot &&
(!bf_isaggr(bf) || (bf_isaggr(bf) && bf->bf_al < 8192))) {
flags = ATH9K_TXDESC_RTSENA;
cix = rt->info[sc->sc_protrix].controlRate;
cix = rt->info[sc->sc_protrix].ctrl_rate;
rtsctsena = 1;
}
/*
* For AR5416 - RTS cannot be followed by a frame larger than 8K.
*/
if (bf_isaggr(bf) && (bf->bf_al > ah->ah_caps.rts_aggr_limit)) {
/*
* Ensure that in the case of SM Dynamic power save
* while we are bursting the second aggregate the
* RTS is cleared.
*/
/* For AR5416 - RTS cannot be followed by a frame larger than 8K */
if (bf_isaggr(bf) && (bf->bf_al > ah->ah_caps.rts_aggr_limit))
flags &= ~(ATH9K_TXDESC_RTSENA);
}
/*
* CTS transmit rate is derived from the transmit rate
* by looking in the h/w rate table. We must also factor
* in whether or not a short preamble is to be used.
* NB: cix is set above where RTS/CTS is enabled
* CTS transmit rate is derived from the transmit rate by looking in the
* h/w rate table. We must also factor in whether or not a short
* preamble is to be used. NB: cix is set above where RTS/CTS is enabled
*/
BUG_ON(cix == 0xff);
ctsrate = rt->info[cix].rateCode |
(bf_isshpreamble(bf) ? rt->info[cix].shortPreamble : 0);
/*
* Setup HAL rate series
*/
memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4);
ctsrate = rt->info[cix].ratecode |
(bf_isshpreamble(bf) ? rt->info[cix].short_preamble : 0);
for (i = 0; i < 4; i++) {
if (!rates[i].count)
if (!rates[i].count || (rates[i].idx < 0))
continue;
rix = rates[i].idx;
series[i].Rate = rt->info[rix].rateCode |
(bf_isshpreamble(bf) ? rt->info[rix].shortPreamble : 0);
series[i].Rate = rt->info[rix].ratecode |
(bf_isshpreamble(bf) ? rt->info[rix].short_preamble : 0);
series[i].Tries = rates[i].count;
@ -645,13 +610,9 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS;
}
/*
* set dur_update_en for l-sig computation except for PS-Poll frames
*/
ath9k_hw_set11n_ratescenario(ah, ds, lastds,
!bf_ispspoll(bf),
ctsrate,
ctsduration,
/* set dur_update_en for l-sig computation except for PS-Poll frames */
ath9k_hw_set11n_ratescenario(ah, ds, lastds, !bf_ispspoll(bf),
ctsrate, ctsduration,
series, 4, flags);
if (sc->sc_config.ath_aggr_prot && flags)
@ -662,7 +623,6 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
* Function to send a normal HT (non-AMPDU) frame
* NB: must be called with txq lock held
*/
static int ath_tx_send_normal(struct ath_softc *sc,
struct ath_txq *txq,
struct ath_atx_tid *tid,
@ -1256,7 +1216,6 @@ static u32 ath_lookup_rate(struct ath_softc *sc,
struct ath_atx_tid *tid)
{
struct ath_rate_table *rate_table = sc->hw_rate_table[sc->sc_curmode];
const struct ath9k_rate_table *rt = sc->sc_currates;
struct sk_buff *skb;
struct ieee80211_tx_info *tx_info;
struct ieee80211_tx_rate *rates;
@ -1280,7 +1239,7 @@ static u32 ath_lookup_rate(struct ath_softc *sc,
for (i = 0; i < 4; i++) {
if (rates[i].count) {
if (rt->info[rates[i].idx].phy != PHY_HT) {
if (!WLAN_RC_PHY_HT(rate_table->info[rates[i].idx].phy)) {
legacy = 1;
break;
}
@ -1325,7 +1284,7 @@ static int ath_compute_num_delims(struct ath_softc *sc,
struct ath_buf *bf,
u16 frmlen)
{
const struct ath9k_rate_table *rt = sc->sc_currates;
struct ath_rate_table *rt = sc->hw_rate_table[sc->sc_curmode];
struct sk_buff *skb = bf->bf_mpdu;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
u32 nsymbits, nsymbols, mpdudensity;
@ -1362,7 +1321,7 @@ static int ath_compute_num_delims(struct ath_softc *sc,
rix = tx_info->control.rates[0].idx;
flags = tx_info->control.rates[0].flags;
rc = rt->info[rix].rateCode;
rc = rt->info[rix].ratecode;
width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0;
half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0;
@ -1713,10 +1672,6 @@ static void ath_tx_setup_buffer(struct ath_softc *sc, struct ath_buf *bf,
bf->bf_keyix = ATH9K_TXKEYIX_INVALID;
}
/* Rate series */
setup_rate_retries(sc, skb);
/* Assign seqno, tidno */
if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR))