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iwlwifi: mvm: remove GF support in rs

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mvm doesn't support HT GF so drop all relevant code in rs.

Signed-off-by: Eyal Shapira <eyal@wizery.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Eyal Shapira 2013-08-11 20:27:18 +03:00 committed by Johannes Berg
parent d310e4059f
commit 6a524f487c
2 changed files with 19 additions and 72 deletions
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90
drivers/net/wireless/iwlwifi/mvm/rs.c
View File

@ -449,8 +449,7 @@ static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl,
*/
/* FIXME:RS:remove this function and put the flags statically in the table */
static u32 rate_n_flags_from_tbl(struct iwl_mvm *mvm,
struct iwl_scale_tbl_info *tbl,
int index, u8 use_green)
struct iwl_scale_tbl_info *tbl, int index)
{
u32 rate_n_flags = 0;
@ -498,14 +497,6 @@ static u32 rate_n_flags_from_tbl(struct iwl_mvm *mvm,
if (tbl->is_SGI)
rate_n_flags |= RATE_MCS_SGI_MSK;
/* TODO: remove GF completely ? */
if (use_green) {
rate_n_flags |= RATE_HT_MCS_GF_MSK;
if (is_ht_siso(tbl->lq_type) && tbl->is_SGI) {
rate_n_flags &= ~RATE_MCS_SGI_MSK;
IWL_ERR(mvm, "GF was set with SGI:SISO\n");
}
}
return rate_n_flags;
}
@ -617,22 +608,6 @@ static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags,
return 1;
}
/**
* Green-field mode is valid if the station supports it and
* there are no non-GF stations present in the BSS.
*/
static bool rs_use_green(struct ieee80211_sta *sta)
{
/*
* There's a bug somewhere in this code that causes the
* scaling to get stuck because GF+SGI can't be combined
* in SISO rates. Until we find that bug, disable GF, it
* has only limited benefit and we still interoperate with
* GF APs since we can always receive GF transmissions.
*/
return false;
}
/**
* rs_get_supported_rates - get the available rates
*
@ -719,7 +694,6 @@ static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta,
u16 rate_mask;
u16 high_low;
u8 switch_to_legacy = 0;
u8 is_green = lq_sta->is_green;
struct iwl_mvm *mvm = lq_sta->drv;
/* check if we need to switch from HT to legacy rates.
@ -768,7 +742,7 @@ static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta,
low = scale_index;
out:
return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green);
return rate_n_flags_from_tbl(lq_sta->drv, tbl, low);
}
/*
@ -1246,7 +1220,6 @@ static int rs_switch_to_mimo2(struct iwl_mvm *mvm,
{
u16 rate_mask;
s32 rate;
s8 is_green = lq_sta->is_green;
if (!sta->ht_cap.ht_supported)
return -1;
@ -1277,10 +1250,10 @@ static int rs_switch_to_mimo2(struct iwl_mvm *mvm,
rate, rate_mask);
return -1;
}
tbl->current_rate = rate_n_flags_from_tbl(mvm, tbl, rate, is_green);
tbl->current_rate = rate_n_flags_from_tbl(mvm, tbl, rate);
IWL_DEBUG_RATE(mvm, "LQ: Switch to new mcs %X index is green %X\n",
tbl->current_rate, is_green);
IWL_DEBUG_RATE(mvm, "LQ: Switch to new mcs %X index\n",
tbl->current_rate);
return 0;
}
@ -1293,7 +1266,6 @@ static int rs_switch_to_siso(struct iwl_mvm *mvm,
struct iwl_scale_tbl_info *tbl, int index)
{
u16 rate_mask;
u8 is_green = lq_sta->is_green;
s32 rate;
if (!sta->ht_cap.ht_supported)
@ -1306,9 +1278,6 @@ static int rs_switch_to_siso(struct iwl_mvm *mvm,
tbl->max_search = IWL_MAX_SEARCH;
rate_mask = lq_sta->active_siso_rate;
if (is_green)
tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield*/
rs_set_bw_from_sta(tbl, sta);
rs_set_expected_tpt_table(lq_sta, tbl);
rate = rs_get_best_rate(mvm, lq_sta, tbl, rate_mask, index);
@ -1320,9 +1289,9 @@ static int rs_switch_to_siso(struct iwl_mvm *mvm,
rate, rate_mask);
return -1;
}
tbl->current_rate = rate_n_flags_from_tbl(mvm, tbl, rate, is_green);
IWL_DEBUG_RATE(mvm, "LQ: Switch to new mcs %X index is green %X\n",
tbl->current_rate, is_green);
tbl->current_rate = rate_n_flags_from_tbl(mvm, tbl, rate);
IWL_DEBUG_RATE(mvm, "LQ: Switch to new mcs %X index\n",
tbl->current_rate);
return 0;
}
@ -1431,7 +1400,6 @@ static int rs_move_siso_to_other(struct iwl_mvm *mvm,
struct iwl_lq_sta *lq_sta,
struct ieee80211_sta *sta, int index)
{
u8 is_green = lq_sta->is_green;
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
struct iwl_scale_tbl_info *search_tbl =
&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
@ -1513,13 +1481,6 @@ static int rs_move_siso_to_other(struct iwl_mvm *mvm,
IWL_DEBUG_RATE(mvm, "LQ: SISO toggle SGI/NGI\n");
memcpy(search_tbl, tbl, sz);
if (is_green) {
if (!tbl->is_SGI)
break;
else
IWL_ERR(mvm,
"SGI was set in GF+SISO\n");
}
search_tbl->is_SGI = !tbl->is_SGI;
rs_set_expected_tpt_table(lq_sta, search_tbl);
if (tbl->is_SGI) {
@ -1528,8 +1489,7 @@ static int rs_move_siso_to_other(struct iwl_mvm *mvm,
break;
}
search_tbl->current_rate =
rate_n_flags_from_tbl(mvm, search_tbl,
index, is_green);
rate_n_flags_from_tbl(mvm, search_tbl, index);
update_search_tbl_counter = 1;
goto out;
default:
@ -1559,7 +1519,6 @@ static int rs_move_mimo2_to_other(struct iwl_mvm *mvm,
struct iwl_lq_sta *lq_sta,
struct ieee80211_sta *sta, int index)
{
s8 is_green = lq_sta->is_green;
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
struct iwl_scale_tbl_info *search_tbl =
&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]);
@ -1640,8 +1599,7 @@ static int rs_move_mimo2_to_other(struct iwl_mvm *mvm,
break;
}
search_tbl->current_rate =
rate_n_flags_from_tbl(mvm, search_tbl,
index, is_green);
rate_n_flags_from_tbl(mvm, search_tbl, index);
update_search_tbl_counter = 1;
goto out;
default:
@ -1752,12 +1710,12 @@ static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
static void rs_update_rate_tbl(struct iwl_mvm *mvm,
struct iwl_lq_sta *lq_sta,
struct iwl_scale_tbl_info *tbl,
int index, u8 is_green)
int index)
{
u32 rate;
/* Update uCode's rate table. */
rate = rate_n_flags_from_tbl(mvm, tbl, index, is_green);
rate = rate_n_flags_from_tbl(mvm, tbl, index);
rs_fill_link_cmd(mvm, lq_sta, rate);
iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, CMD_ASYNC, false);
}
@ -1802,7 +1760,6 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm,
u8 update_lq = 0;
struct iwl_scale_tbl_info *tbl, *tbl1;
u16 rate_scale_index_msk = 0;
u8 is_green = 0;
u8 active_tbl = 0;
u8 done_search = 0;
u16 high_low;
@ -1844,11 +1801,6 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm,
active_tbl = 1 - lq_sta->active_tbl;
tbl = &(lq_sta->lq_info[active_tbl]);
if (is_legacy(tbl->lq_type))
lq_sta->is_green = 0;
else
lq_sta->is_green = rs_use_green(sta);
is_green = lq_sta->is_green;
/* current tx rate */
index = lq_sta->last_txrate_idx;
@ -1887,7 +1839,7 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm,
tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
/* get "active" rate info */
index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
rs_update_rate_tbl(mvm, lq_sta, tbl, index, is_green);
rs_update_rate_tbl(mvm, lq_sta, tbl, index);
}
return;
}
@ -2122,7 +2074,7 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm,
lq_update:
/* Replace uCode's rate table for the destination station. */
if (update_lq)
rs_update_rate_tbl(mvm, lq_sta, tbl, index, is_green);
rs_update_rate_tbl(mvm, lq_sta, tbl, index);
rs_stay_in_table(lq_sta, false);
@ -2203,7 +2155,7 @@ lq_update:
}
out:
tbl->current_rate = rate_n_flags_from_tbl(mvm, tbl, index, is_green);
tbl->current_rate = rate_n_flags_from_tbl(mvm, tbl, index);
lq_sta->last_txrate_idx = index;
}
@ -2230,7 +2182,6 @@ static void rs_initialize_lq(struct iwl_mvm *mvm,
int rate_idx;
int i;
u32 rate;
u8 use_green = rs_use_green(sta);
u8 active_tbl = 0;
u8 valid_tx_ant;
@ -2262,7 +2213,7 @@ static void rs_initialize_lq(struct iwl_mvm *mvm,
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(mvm, tbl, rate_idx, use_green);
rate = rate_n_flags_from_tbl(mvm, tbl, rate_idx);
tbl->current_rate = rate;
rs_set_expected_tpt_table(lq_sta, tbl);
rs_fill_link_cmd(NULL, lq_sta, rate);
@ -2379,7 +2330,6 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
lq_sta->max_rate_idx = -1;
lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX;
lq_sta->is_green = rs_use_green(sta);
lq_sta->band = sband->band;
/*
* active legacy rates as per supported rates bitmap
@ -2706,10 +2656,9 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
(is_ht20(tbl)) ? "20MHz" :
(is_ht40(tbl)) ? "40MHz" :
(is_ht80(tbl)) ? "80Mhz" : "BAD BW");
desc += sprintf(buff+desc, " %s %s %s\n",
desc += sprintf(buff+desc, " %s %s\n",
(tbl->is_SGI) ? "SGI" : "",
(lq_sta->is_green) ? "GF enabled" : "",
(lq_sta->is_agg) ? "AGG on" : "");
(lq_sta->is_agg) ? "AGG on" : "");
}
desc += sprintf(buff+desc, "last tx rate=0x%X\n",
lq_sta->last_rate_n_flags);
@ -2777,7 +2726,7 @@ static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
for (i = 0; i < LQ_SIZE; i++) {
tbl = &(lq_sta->lq_info[i]);
desc += sprintf(buff+desc,
"%s type=%d SGI=%d BW=%s DUP=0 GF=%d\n"
"%s type=%d SGI=%d BW=%s DUP=0\n"
"rate=0x%X\n",
lq_sta->active_tbl == i ? "*" : "x",
tbl->lq_type,
@ -2785,7 +2734,6 @@ static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file,
is_ht20(tbl) ? "20Mhz" :
is_ht40(tbl) ? "40Mhz" :
is_ht80(tbl) ? "80Mhz" : "ERR",
lq_sta->is_green,
tbl->current_rate);
for (j = 0; j < IWL_RATE_COUNT; j++) {
desc += sprintf(buff+desc,

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

@ -300,7 +300,6 @@ struct iwl_lq_sta {
u64 flush_timer; /* time staying in mode before new search */
u8 action_counter; /* # mode-switch actions tried */
u8 is_green;
bool is_vht;
enum ieee80211_band band;