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iwlwifi: mvm: rs: add rate scaling support for 160MHz channels 

Expand TLC to support 160MHz channels. Full support for A-MSDU
case will be added separately.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Gregory Greenman 2016-05-25 18:31:39 +03:00 committed by Luca Coelho
parent 99980ecfff
commit 855f492f65
2 changed files with 60 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
drivers/net/wireless/intel/iwlwifi/mvm/rs.c
View File

@ -211,6 +211,9 @@ static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
if (is_ht80(rate) && (vht_cap->cap &
IEEE80211_VHT_CAP_SHORT_GI_80))
return true;
if (is_ht160(rate) && (vht_cap->cap &
IEEE80211_VHT_CAP_SHORT_GI_160))
return true;
return false;
}
@ -445,6 +448,13 @@ static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = {
{0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691},
};
static const u16 expected_tpt_siso_160MHz[4][IWL_RATE_COUNT] = {
{0, 0, 0, 0, 191, 0, 244, 288, 298, 308, 313, 318, 323, 328, 330},
{0, 0, 0, 0, 200, 0, 251, 293, 302, 312, 317, 322, 327, 332, 334},
{0, 0, 0, 0, 439, 0, 875, 1307, 1736, 2584, 3419, 3831, 4240, 5049, 5581},
{0, 0, 0, 0, 488, 0, 972, 1451, 1925, 2864, 3785, 4240, 4691, 5581, 6165},
};
static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = {
{0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0},
{0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0},
@ -466,6 +476,13 @@ static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = {
{0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545},
};
static const u16 expected_tpt_mimo2_160MHz[4][IWL_RATE_COUNT] = {
{0, 0, 0, 0, 240, 0, 278, 308, 313, 319, 322, 324, 328, 330, 334},
{0, 0, 0, 0, 247, 0, 282, 310, 315, 320, 323, 325, 329, 332, 338},
{0, 0, 0, 0, 875, 0, 1735, 2582, 3414, 5043, 6619, 7389, 8147, 9629, 10592},
{0, 0, 0, 0, 971, 0, 1925, 2861, 3779, 5574, 7304, 8147, 8976, 10592, 11640},
};
/* mbps, mcs */
static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = {
{ "1", "BPSK DSSS"},
@ -901,7 +918,6 @@ static int rs_rate_from_ucode_rate(const u32 ucode_rate,
}
}
WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_160);
WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 &&
!is_vht(rate));
@ -1495,6 +1511,9 @@ static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta,
case RATE_MCS_CHAN_WIDTH_80:
ht_tbl_pointer = expected_tpt_siso_80MHz;
break;
case RATE_MCS_CHAN_WIDTH_160:
ht_tbl_pointer = expected_tpt_siso_160MHz;
break;
default:
WARN_ON_ONCE(1);
}
@ -1509,6 +1528,9 @@ static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta,
case RATE_MCS_CHAN_WIDTH_80:
ht_tbl_pointer = expected_tpt_mimo2_80MHz;
break;
case RATE_MCS_CHAN_WIDTH_160:
ht_tbl_pointer = expected_tpt_mimo2_160MHz;
break;
default:
WARN_ON_ONCE(1);
}
@ -1583,12 +1605,17 @@ static s32 rs_get_best_rate(struct iwl_mvm *mvm,
static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta)
{
if (sta->bandwidth >= IEEE80211_STA_RX_BW_80)
switch (sta->bandwidth) {
case IEEE80211_STA_RX_BW_160:
return RATE_MCS_CHAN_WIDTH_160;
case IEEE80211_STA_RX_BW_80:
return RATE_MCS_CHAN_WIDTH_80;
else if (sta->bandwidth >= IEEE80211_STA_RX_BW_40)
case IEEE80211_STA_RX_BW_40:
return RATE_MCS_CHAN_WIDTH_40;
return RATE_MCS_CHAN_WIDTH_20;
case IEEE80211_STA_RX_BW_20:
default:
return RATE_MCS_CHAN_WIDTH_20;
}
}
/*
@ -2566,6 +2593,9 @@ static const struct rs_init_rate_info rs_optimal_rates_ht[] = {
{ S8_MIN, IWL_RATE_MCS_0_INDEX},
};
/* MCS index 9 is not valid for 20MHz VHT channel width,
* but is ok for 40, 80 and 160MHz channels.
*/
static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = {
{ -60, IWL_RATE_MCS_8_INDEX },
{ -64, IWL_RATE_MCS_7_INDEX },
@ -2578,7 +2608,7 @@ static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = {
{ S8_MIN, IWL_RATE_MCS_0_INDEX},
};
static const struct rs_init_rate_info rs_optimal_rates_vht_40_80mhz[] = {
static const struct rs_init_rate_info rs_optimal_rates_vht[] = {
{ -60, IWL_RATE_MCS_9_INDEX },
{ -64, IWL_RATE_MCS_8_INDEX },
{ -68, IWL_RATE_MCS_7_INDEX },
@ -2641,9 +2671,9 @@ static void rs_init_optimal_rate(struct iwl_mvm *mvm,
lq_sta->optimal_nentries =
ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
} else {
lq_sta->optimal_rates = rs_optimal_rates_vht_40_80mhz;
lq_sta->optimal_rates = rs_optimal_rates_vht;
lq_sta->optimal_nentries =
ARRAY_SIZE(rs_optimal_rates_vht_40_80mhz);
ARRAY_SIZE(rs_optimal_rates_vht);
}
} else if (is_ht(rate)) {
lq_sta->optimal_rates = rs_optimal_rates_ht;
@ -2735,23 +2765,25 @@ static void rs_get_initial_rate(struct iwl_mvm *mvm,
*/
if (sta->vht_cap.vht_supported &&
best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
if (sta->bandwidth >= IEEE80211_STA_RX_BW_40) {
initial_rates = rs_optimal_rates_vht_40_80mhz;
nentries = ARRAY_SIZE(rs_optimal_rates_vht_40_80mhz);
if (sta->bandwidth >= IEEE80211_STA_RX_BW_80)
rate->bw = RATE_MCS_CHAN_WIDTH_80;
else
rate->bw = RATE_MCS_CHAN_WIDTH_40;
} else if (sta->bandwidth == IEEE80211_STA_RX_BW_20) {
switch (sta->bandwidth) {
case IEEE80211_STA_RX_BW_160:
case IEEE80211_STA_RX_BW_80:
case IEEE80211_STA_RX_BW_40:
initial_rates = rs_optimal_rates_vht;
nentries = ARRAY_SIZE(rs_optimal_rates_vht);
break;
case IEEE80211_STA_RX_BW_20:
initial_rates = rs_optimal_rates_vht_20mhz;
nentries = ARRAY_SIZE(rs_optimal_rates_vht_20mhz);
rate->bw = RATE_MCS_CHAN_WIDTH_20;
} else {
break;
default:
IWL_ERR(mvm, "Invalid BW %d\n", sta->bandwidth);
goto out;
}
active_rate = lq_sta->active_siso_rate;
rate->type = LQ_VHT_SISO;
rate->bw = rs_bw_from_sta_bw(sta);
} else if (sta->ht_cap.ht_supported &&
best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) {
initial_rates = rs_optimal_rates_ht;
@ -3058,6 +3090,9 @@ void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg)
case RATE_MCS_CHAN_WIDTH_80:
mvm->drv_rx_stats.bw_80_frames++;
break;
case RATE_MCS_CHAN_WIDTH_160:
mvm->drv_rx_stats.bw_160_frames++;
break;
default:
WARN_ONCE(1, "bad BW. rate 0x%x", rate);
}
@ -3706,7 +3741,8 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
desc += sprintf(buff + desc, " %s",
(is_ht20(rate)) ? "20MHz" :
(is_ht40(rate)) ? "40MHz" :
(is_ht80(rate)) ? "80Mhz" : "BAD BW");
(is_ht80(rate)) ? "80MHz" :
(is_ht160(rate)) ? "160MHz" : "BAD BW");
desc += sprintf(buff + desc, " %s %s %s %s\n",
(rate->sgi) ? "SGI" : "NGI",
(rate->ldpc) ? "LDPC" : "BCC",
@ -3788,9 +3824,10 @@ static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
lq_sta->active_tbl == i ? "*" : "x",
rate->type,
rate->sgi,
is_ht20(rate) ? "20Mhz" :
is_ht40(rate) ? "40Mhz" :
is_ht80(rate) ? "80Mhz" : "ERR",
is_ht20(rate) ? "20MHz" :
is_ht40(rate) ? "40MHz" :
is_ht80(rate) ? "80MHz" :
is_ht160(rate) ? "160MHz" : "ERR",
rate->index);
for (j = 0; j < IWL_RATE_COUNT; j++) {
desc += sprintf(buff+desc,

1
drivers/net/wireless/intel/iwlwifi/mvm/rs.h
View File

@ -205,6 +205,7 @@ struct rs_rate {
#define is_ht20(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_20)
#define is_ht40(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_40)
#define is_ht80(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_80)
#define is_ht160(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_160)
#define IWL_MAX_MCS_DISPLAY_SIZE 12