[PATCH 21/21] ath9k: Nuke struct ath_tx_ratectrl_state

Luis R. Rodriguez
2009-07-15T00:14:28Z

From: Vasanthakumar Thiagarajan <vasanth@atheros.com>

Move its only member (u8 per) to struct ath_rate_priv.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
---
drivers/net/wireless/ath/ath9k/rc.c | 50 +++++++++++++++++-----------------
drivers/net/wireless/ath/ath9k/rc.h | 7 +---
2 files changed, 27 insertions(+), 30 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c
index a97dd7b..a07efa2 100644
--- a/drivers/net/wireless/ath/ath9k/rc.c
+++ b/drivers/net/wireless/ath/ath9k/rc.c
@@ -636,7 +636,7 @@ static u8 ath_rc_get_highest_rix(struct ath_softc *sc,
* 10-15 and we would be worse off then staying
* at the current rate.
*/
- per_thres = ath_rc_priv->state[rate].per;
+ per_thres = ath_rc_priv->per[rate];
if (per_thres < 12)
per_thres = 12;

@@ -881,13 +881,13 @@ static bool ath_rc_update_per(struct ath_softc *sc,
100 * 9 / 10
};

- last_per = ath_rc_priv->state[tx_rate].per;
+ last_per = ath_rc_priv->per[tx_rate];

if (xretries) {
if (xretries == 1) {
- ath_rc_priv->state[tx_rate].per += 30;
- if (ath_rc_priv->state[tx_rate].per > 100)
- ath_rc_priv->state[tx_rate].per = 100;
+ ath_rc_priv->per[tx_rate] += 30;
+ if (ath_rc_priv->per[tx_rate] > 100)
+ ath_rc_priv->per[tx_rate] = 100;
} else {
/* xretries == 2 */
count = ARRAY_SIZE(nretry_to_per_lookup);
@@ -895,7 +895,7 @@ static bool ath_rc_update_per(struct ath_softc *sc,
retries = count - 1;

/* new_PER = 7/8*old_PER + 1/8*(currentPER) */
- ath_rc_priv->state[tx_rate].per =
+ ath_rc_priv->per[tx_rate] =
(u8)(last_per - (last_per >> 3) + (100 >> 3));
}

@@ -931,10 +931,10 @@ static bool ath_rc_update_per(struct ath_softc *sc,
n_frames = tx_info_priv->n_frames * (retries + 1);
cur_per = (100 * n_bad_frames / n_frames) >> 3;
new_per = (u8)(last_per - (last_per >> 3) + cur_per);
- ath_rc_priv->state[tx_rate].per = new_per;
+ ath_rc_priv->per[tx_rate] = new_per;
}
} else {
- ath_rc_priv->state[tx_rate].per =
+ ath_rc_priv->per[tx_rate] =
(u8)(last_per - (last_per >> 3) +
(nretry_to_per_lookup[retries] >> 3));
}
@@ -962,8 +962,8 @@ static bool ath_rc_update_per(struct ath_softc *sc,
ath_rc_priv->probe_rate;
probe_rate = ath_rc_priv->probe_rate;

- if (ath_rc_priv->state[probe_rate].per > 30)
- ath_rc_priv->state[probe_rate].per = 20;
+ if (ath_rc_priv->per[probe_rate] > 30)
+ ath_rc_priv->per[probe_rate] = 20;

ath_rc_priv->probe_rate = 0;

@@ -1018,7 +1018,7 @@ static void ath_rc_update_ht(struct ath_softc *sc,
if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt))
return;

- last_per = ath_rc_priv->state[tx_rate].per;
+ last_per = ath_rc_priv->per[tx_rate];

/* Update PER first */
state_change = ath_rc_update_per(sc, rate_table, ath_rc_priv,
@@ -1029,7 +1029,7 @@ static void ath_rc_update_ht(struct ath_softc *sc,
* If this rate looks bad (high PER) then stop using it for
* a while (except if we are probing).
*/
- if (ath_rc_priv->state[tx_rate].per >= 55 && tx_rate > 0 &&
+ if (ath_rc_priv->per[tx_rate] >= 55 && tx_rate > 0 &&
rate_table->info[tx_rate].ratekbps <=
rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) {
ath_rc_get_lower_rix(rate_table, ath_rc_priv,
@@ -1041,26 +1041,26 @@ static void ath_rc_update_ht(struct ath_softc *sc,

/* Make sure the rates below this have lower PER */
/* Monotonicity is kept only for rates below the current rate. */
- if (ath_rc_priv->state[tx_rate].per < last_per) {
+ if (ath_rc_priv->per[tx_rate] < last_per) {
for (rate = tx_rate - 1; rate >= 0; rate--) {
if (rate_table->info[rate].phy !=
rate_table->info[tx_rate].phy)
break;

- if (ath_rc_priv->state[rate].per >
- ath_rc_priv->state[rate+1].per) {
- ath_rc_priv->state[rate].per =
- ath_rc_priv->state[rate+1].per;
+ if (ath_rc_priv->per[rate] >
+ ath_rc_priv->per[rate+1]) {
+ ath_rc_priv->per[rate] =
+ ath_rc_priv->per[rate+1];
}
}
}

/* Maintain monotonicity for rates above the current rate */
for (rate = tx_rate; rate < size - 1; rate++) {
- if (ath_rc_priv->state[rate+1].per <
- ath_rc_priv->state[rate].per)
- ath_rc_priv->state[rate+1].per =
- ath_rc_priv->state[rate].per;
+ if (ath_rc_priv->per[rate+1] <
+ ath_rc_priv->per[rate])
+ ath_rc_priv->per[rate+1] =
+ ath_rc_priv->per[rate];
}

/* Every so often, we reduce the thresholds
@@ -1068,15 +1068,15 @@ static void ath_rc_update_ht(struct ath_softc *sc,
if (now_msec - ath_rc_priv->per_down_time >=
rate_table->probe_interval) {
for (rate = 0; rate < size; rate++) {
- ath_rc_priv->state[rate].per =
- 7 * ath_rc_priv->state[rate].per / 8;
+ ath_rc_priv->per[rate] =
+ 7 * ath_rc_priv->per[rate] / 8;
}

ath_rc_priv->per_down_time = now_msec;
}

ath_debug_stat_retries(sc, tx_rate, xretries, retries,
- ath_rc_priv->state[tx_rate].per);
+ ath_rc_priv->per[tx_rate]);

}

@@ -1213,7 +1213,7 @@ static void ath_rc_init(struct ath_softc *sc,

/* Initialize thresholds according to the global rate table */
for (i = 0 ; i < ath_rc_priv->rate_table_size; i++) {
- ath_rc_priv->state[i].per = 0;
+ ath_rc_priv->per[i] = 0;
}

/* Determine the valid rates */
diff --git a/drivers/net/wireless/ath/ath9k/rc.h b/drivers/net/wireless/ath/ath9k/rc.h
index c794d6c..fa21a62 100644
--- a/drivers/net/wireless/ath/ath9k/rc.h
+++ b/drivers/net/wireless/ath/ath9k/rc.h
@@ -122,10 +122,6 @@ struct ath_rate_table {
u8 initial_ratemax;
};

-struct ath_tx_ratectrl_state {
- u8 per; /* recent estimate of packet error rate (%) */
-};
-
struct ath_rateset {
u8 rs_nrates;
u8 rs_rates[ATH_RATE_MAX];
@@ -141,6 +137,7 @@ struct ath_rateset {
* @per_down_time: msec timestamp for last PER down step
* @valid_phy_ratecnt: valid rate count
* @rate_max_phy: phy index for the max rate
+ * @per: PER for every valid rate in %
* @probe_interval: interval for ratectrl to probe for other rates
* @prev_data_rix: rate idx of last data frame
* @ht_cap: HT capabilities
@@ -157,12 +154,12 @@ struct ath_rate_priv {
u8 valid_phy_ratecnt[WLAN_RC_PHY_MAX];
u8 valid_phy_rateidx[WLAN_RC_PHY_MAX][RATE_TABLE_SIZE];
u8 rate_max_phy;
+ u8 per[RATE_TABLE_SIZE];
u32 probe_time;
u32 per_down_time;
u32 probe_interval;
u32 prev_data_rix;
u32 tx_triglevel_max;
- struct ath_tx_ratectrl_state state[RATE_TABLE_SIZE];
struct ath_rateset neg_rates;
struct ath_rateset neg_ht_rates;
struct ath_rate_softc *asc;
--
1.6.0.6