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Commit e63835b0 authored by Sujith's avatar Sujith Committed by John W. Linville
Browse files

ath9k: Remove ath9k_rate_table 



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

Signed-off-by: default avatarSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent a8efee4f

drivers/net/wireless/ath9k/ath9k.h

+3 −23
Original line number Diff line number Diff line
@@ -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);

drivers/net/wireless/ath9k/beacon.c

+4 −4
Original line number Diff line number Diff line
@@ -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 */

drivers/net/wireless/ath9k/core.c

+9 −43
Original line number Diff line number Diff line
@@ -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)) {

		/*

drivers/net/wireless/ath9k/core.h

+0 −5
Original line number Diff line number Diff line
@@ -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];

drivers/net/wireless/ath9k/hw.c

+3 −187
Original line number Diff line number Diff line
@@ -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 */

/*******************/