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path: root/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
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Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn-rs.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-agn-rs.c106
1 files changed, 76 insertions, 30 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index 27f50471aed..13039a02447 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -1,6 +1,6 @@
/******************************************************************************
*
- * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved.
+ * Copyright(c) 2005 - 2009 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
@@ -49,6 +49,8 @@
#define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */
#define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */
+/* max allowed rate miss before sync LQ cmd */
+#define IWL_MISSED_RATE_MAX 15
/* max time to accum history 2 seconds */
#define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ)
@@ -148,6 +150,8 @@ struct iwl_lq_sta {
u16 active_mimo2_rate;
u16 active_mimo3_rate;
u16 active_rate_basic;
+ s8 max_rate_idx; /* Max rate set by user */
+ u8 missed_rate_counter;
struct iwl_link_quality_cmd lq;
struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
@@ -463,8 +467,9 @@ static int rs_collect_tx_data(struct iwl_rate_scale_data *windows,
* Fill uCode API rate_n_flags field, based on "search" or "active" table.
*/
/* FIXME:RS:remove this function and put the flags statically in the table */
-static u32 rate_n_flags_from_tbl(struct iwl_scale_tbl_info *tbl,
- int index, u8 use_green)
+static u32 rate_n_flags_from_tbl(struct iwl_priv *priv,
+ struct iwl_scale_tbl_info *tbl,
+ int index, u8 use_green)
{
u32 rate_n_flags = 0;
@@ -475,7 +480,7 @@ static u32 rate_n_flags_from_tbl(struct iwl_scale_tbl_info *tbl,
} else if (is_Ht(tbl->lq_type)) {
if (index > IWL_LAST_OFDM_RATE) {
- IWL_ERROR("invalid HT rate index %d\n", index);
+ IWL_ERR(priv, "Invalid HT rate index %d\n", index);
index = IWL_LAST_OFDM_RATE;
}
rate_n_flags = RATE_MCS_HT_MSK;
@@ -487,7 +492,7 @@ static u32 rate_n_flags_from_tbl(struct iwl_scale_tbl_info *tbl,
else
rate_n_flags |= iwl_rates[index].plcp_mimo3;
} else {
- IWL_ERROR("Invalid tbl->lq_type %d\n", tbl->lq_type);
+ IWL_ERR(priv, "Invalid tbl->lq_type %d\n", tbl->lq_type);
}
rate_n_flags |= ((tbl->ant_type << RATE_MCS_ANT_POS) &
@@ -507,7 +512,7 @@ static u32 rate_n_flags_from_tbl(struct iwl_scale_tbl_info *tbl,
rate_n_flags |= RATE_MCS_GF_MSK;
if (is_siso(tbl->lq_type) && tbl->is_SGI) {
rate_n_flags &= ~RATE_MCS_SGI_MSK;
- IWL_ERROR("GF was set with SGI:SISO\n");
+ IWL_ERR(priv, "GF was set with SGI:SISO\n");
}
}
}
@@ -758,7 +763,7 @@ static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta,
low = scale_index;
out:
- return rate_n_flags_from_tbl(tbl, low, is_green);
+ return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green);
}
/*
@@ -839,10 +844,15 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
/* the last LQ command could failed so the LQ in ucode not
* the same in driver sync up
*/
- iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
+ lq_sta->missed_rate_counter++;
+ if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) {
+ lq_sta->missed_rate_counter = 0;
+ iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
+ }
goto out;
}
+ lq_sta->missed_rate_counter = 0;
/* Update frame history window with "failure" for each Tx retry. */
while (retries) {
/* Look up the rate and other info used for each tx attempt.
@@ -1129,7 +1139,7 @@ static int rs_switch_to_mimo2(struct iwl_priv *priv,
s32 rate;
s8 is_green = lq_sta->is_green;
- if (!conf->ht.enabled || !sta->ht_cap.ht_supported)
+ if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
return -1;
if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2)
@@ -1176,7 +1186,7 @@ static int rs_switch_to_mimo2(struct iwl_priv *priv,
rate, rate_mask);
return -1;
}
- tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green);
+ tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n",
tbl->current_rate, is_green);
@@ -1196,7 +1206,7 @@ static int rs_switch_to_siso(struct iwl_priv *priv,
u8 is_green = lq_sta->is_green;
s32 rate;
- if (!conf->ht.enabled || !sta->ht_cap.ht_supported)
+ if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported)
return -1;
IWL_DEBUG_RATE("LQ: try to switch to SISO\n");
@@ -1236,7 +1246,7 @@ static int rs_switch_to_siso(struct iwl_priv *priv,
rate, rate_mask);
return -1;
}
- tbl->current_rate = rate_n_flags_from_tbl(tbl, rate, is_green);
+ tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green);
IWL_DEBUG_RATE("LQ: Switch to new mcs %X index is green %X\n",
tbl->current_rate, is_green);
return 0;
@@ -1430,7 +1440,8 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
if (!tbl->is_SGI)
break;
else
- IWL_ERROR("SGI was set in GF+SISO\n");
+ IWL_ERR(priv,
+ "SGI was set in GF+SISO\n");
}
search_tbl->is_SGI = !tbl->is_SGI;
rs_set_expected_tpt_table(lq_sta, search_tbl);
@@ -1439,8 +1450,9 @@ static int rs_move_siso_to_other(struct iwl_priv *priv,
if (tpt >= search_tbl->expected_tpt[index])
break;
}
- search_tbl->current_rate = rate_n_flags_from_tbl(
- search_tbl, index, is_green);
+ search_tbl->current_rate =
+ rate_n_flags_from_tbl(priv, search_tbl,
+ index, is_green);
goto out;
}
tbl->action++;
@@ -1551,8 +1563,9 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv,
if (tpt >= search_tbl->expected_tpt[index])
break;
}
- search_tbl->current_rate = rate_n_flags_from_tbl(
- search_tbl, index, is_green);
+ search_tbl->current_rate =
+ rate_n_flags_from_tbl(priv, search_tbl,
+ index, is_green);
goto out;
}
@@ -1745,16 +1758,25 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
rate_scale_index_msk = rate_mask;
if (!((1 << index) & rate_scale_index_msk)) {
- IWL_ERROR("Current Rate is not valid\n");
+ IWL_ERR(priv, "Current Rate is not valid\n");
return;
}
/* Get expected throughput table and history window for current rate */
if (!tbl->expected_tpt) {
- IWL_ERROR("tbl->expected_tpt is NULL\n");
+ IWL_ERR(priv, "tbl->expected_tpt is NULL\n");
return;
}
+ /* force user max rate if set by user */
+ if ((lq_sta->max_rate_idx != -1) &&
+ (lq_sta->max_rate_idx < index)) {
+ index = lq_sta->max_rate_idx;
+ update_lq = 1;
+ window = &(tbl->win[index]);
+ goto lq_update;
+ }
+
window = &(tbl->win[index]);
/*
@@ -1846,6 +1868,11 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
low = high_low & 0xff;
high = (high_low >> 8) & 0xff;
+ /* If user set max rate, dont allow higher than user constrain */
+ if ((lq_sta->max_rate_idx != -1) &&
+ (lq_sta->max_rate_idx < high))
+ high = IWL_RATE_INVALID;
+
sr = window->success_ratio;
/* Collect measured throughputs for current and adjacent rates */
@@ -1944,7 +1971,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
lq_update:
/* Replace uCode's rate table for the destination station. */
if (update_lq) {
- rate = rate_n_flags_from_tbl(tbl, index, is_green);
+ rate = rate_n_flags_from_tbl(priv, tbl, index, is_green);
rs_fill_link_cmd(priv, lq_sta, rate);
iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
}
@@ -1993,7 +2020,7 @@ lq_update:
* stay with best antenna legacy modulation for a while
* before next round of mode comparisons. */
tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]);
- if (is_legacy(tbl1->lq_type) && !conf->ht.enabled &&
+ if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) &&
lq_sta->action_counter >= 1) {
lq_sta->action_counter = 0;
IWL_DEBUG_RATE("LQ: STAY in legacy table\n");
@@ -2028,7 +2055,7 @@ lq_update:
}
out:
- tbl->current_rate = rate_n_flags_from_tbl(tbl, index, is_green);
+ tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green);
i = index;
lq_sta->last_txrate_idx = i;
@@ -2081,7 +2108,7 @@ static void rs_initialize_lq(struct iwl_priv *priv,
if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type))
rs_toggle_antenna(valid_tx_ant, &rate, tbl);
- rate = rate_n_flags_from_tbl(tbl, rate_idx, use_green);
+ rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green);
tbl->current_rate = rate;
rs_set_expected_tpt_table(lq_sta, tbl);
rs_fill_link_cmd(NULL, lq_sta, rate);
@@ -2106,6 +2133,17 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta,
IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n");
+ /* Get max rate if user set max rate */
+ if (lq_sta) {
+ lq_sta->max_rate_idx = txrc->max_rate_idx;
+ if ((sband->band == IEEE80211_BAND_5GHZ) &&
+ (lq_sta->max_rate_idx != -1))
+ lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE;
+ if ((lq_sta->max_rate_idx < 0) ||
+ (lq_sta->max_rate_idx >= IWL_RATE_COUNT))
+ lq_sta->max_rate_idx = -1;
+ }
+
if (sta)
mask_bit = sta->supp_rates[sband->band];
@@ -2182,6 +2220,8 @@ static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband,
struct ieee80211_conf *conf = &priv->hw->conf;
struct iwl_lq_sta *lq_sta = priv_sta;
u16 mask_bit = 0;
+ int count;
+ int start_rate = 0;
lq_sta->flush_timer = 0;
lq_sta->supp_rates = sta->supp_rates[sband->band];
@@ -2216,6 +2256,8 @@ static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband,
}
lq_sta->is_dup = 0;
+ lq_sta->max_rate_idx = -1;
+ lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX;
lq_sta->is_green = rs_use_green(priv, conf);
lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000);
lq_sta->active_rate_basic = priv->active_rate_basic;
@@ -2254,16 +2296,20 @@ static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband,
lq_sta->drv = priv;
/* Find highest tx rate supported by hardware and destination station */
- mask_bit = sta->supp_rates[sband->band] & lq_sta->active_legacy_rate;
- lq_sta->last_txrate_idx = 3;
- for (i = 0; i < sband->n_bitrates; i++)
+ mask_bit = sta->supp_rates[sband->band];
+ count = sband->n_bitrates;
+ if (sband->band == IEEE80211_BAND_5GHZ) {
+ count += IWL_FIRST_OFDM_RATE;
+ start_rate = IWL_FIRST_OFDM_RATE;
+ mask_bit <<= IWL_FIRST_OFDM_RATE;
+ }
+
+ mask_bit = mask_bit & lq_sta->active_legacy_rate;
+ lq_sta->last_txrate_idx = 4;
+ for (i = start_rate; i < count; i++)
if (mask_bit & BIT(i))
lq_sta->last_txrate_idx = i;
- /* For MODE_IEEE80211A, skip over cck rates in global rate table */
- if (sband->band == IEEE80211_BAND_5GHZ)
- lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
-
rs_initialize_lq(priv, conf, sta, lq_sta);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-15 12:01:27 +0000