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iwlwifi: mvm: add LDPC support 

Use LDPC for Tx and publish support for Rx in case the chip
supports LDPC. Enable it for the 7265 family.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Eyal Shapira 2014-08-09 10:57:59 +03:00 committed by Emmanuel Grumbach
parent 71511c866b
commit a3576ff28e
6 changed files with 40 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/wireless/iwlwifi/iwl-7000.c
View File

@ -220,6 +220,12 @@ static const struct iwl_pwr_tx_backoff iwl7265_pwr_tx_backoffs[] = {
{0},
};
static const struct iwl_ht_params iwl7265_ht_params = {
.stbc = true,
.ldpc = true,
.ht40_bands = BIT(IEEE80211_BAND_2GHZ) | BIT(IEEE80211_BAND_5GHZ),
};
const struct iwl_cfg iwl3165_2ac_cfg = {
.name = "Intel(R) Dual Band Wireless AC 3165",
.fw_name_pre = IWL3165_FW_PRE,
@ -234,7 +240,7 @@ const struct iwl_cfg iwl7265_2ac_cfg = {
.name = "Intel(R) Dual Band Wireless AC 7265",
.fw_name_pre = IWL7265_FW_PRE,
IWL_DEVICE_7000,
.ht_params = &iwl7000_ht_params,
.ht_params = &iwl7265_ht_params,
.nvm_ver = IWL7265_NVM_VERSION,
.nvm_calib_ver = IWL7265_TX_POWER_VERSION,
.pwr_tx_backoffs = iwl7265_pwr_tx_backoffs,
@ -244,7 +250,7 @@ const struct iwl_cfg iwl7265_2n_cfg = {
.name = "Intel(R) Dual Band Wireless N 7265",
.fw_name_pre = IWL7265_FW_PRE,
IWL_DEVICE_7000,
.ht_params = &iwl7000_ht_params,
.ht_params = &iwl7265_ht_params,
.nvm_ver = IWL7265_NVM_VERSION,
.nvm_calib_ver = IWL7265_TX_POWER_VERSION,
.pwr_tx_backoffs = iwl7265_pwr_tx_backoffs,
@ -254,7 +260,7 @@ const struct iwl_cfg iwl7265_n_cfg = {
.name = "Intel(R) Wireless N 7265",
.fw_name_pre = IWL7265_FW_PRE,
IWL_DEVICE_7000,
.ht_params = &iwl7000_ht_params,
.ht_params = &iwl7265_ht_params,
.nvm_ver = IWL7265_NVM_VERSION,
.nvm_calib_ver = IWL7265_TX_POWER_VERSION,
.pwr_tx_backoffs = iwl7265_pwr_tx_backoffs,

2
drivers/net/wireless/iwlwifi/iwl-config.h
View File

@ -171,6 +171,7 @@ struct iwl_base_params {
/*
* @stbc: support Tx STBC and 1*SS Rx STBC
* @ldpc: support Tx/Rx with LDPC
* @use_rts_for_aggregation: use rts/cts protection for HT traffic
* @ht40_bands: bitmap of bands (using %IEEE80211_BAND_*) that support HT40
*/
@ -178,6 +179,7 @@ struct iwl_ht_params {
enum ieee80211_smps_mode smps_mode;
const bool ht_greenfield_support; /* if used set to true */
const bool stbc;
const bool ldpc;
bool use_rts_for_aggregation;
u8 ht40_bands;
};

3
drivers/net/wireless/iwlwifi/iwl-eeprom-parse.c
View File

@ -758,6 +758,9 @@ void iwl_init_ht_hw_capab(const struct iwl_cfg *cfg,
ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
}
if (cfg->ht_params->ldpc)
ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;
if (iwlwifi_mod_params.amsdu_size_8K)
ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;

3
drivers/net/wireless/iwlwifi/iwl-nvm-parse.c
View File

@ -334,6 +334,9 @@ static void iwl_init_vht_hw_capab(const struct iwl_cfg *cfg,
3 << IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT |
7 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
if (cfg->ht_params->ldpc)
vht_cap->cap |= IEEE80211_VHT_CAP_RXLDPC;
if (num_tx_ants > 1)
vht_cap->cap |= IEEE80211_VHT_CAP_TXSTBC;
else

27
drivers/net/wireless/iwlwifi/mvm/rs.c
View File

@ -505,10 +505,10 @@ static const char *rs_pretty_lq_type(enum iwl_table_type type)
static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate,
const char *prefix)
{
IWL_DEBUG_RATE(mvm, "%s: (%s: %d) ANT: %s BW: %d SGI: %d\n",
IWL_DEBUG_RATE(mvm, "%s: (%s: %d) ANT: %s BW: %d SGI: %d LDPC: %d\n",
prefix, rs_pretty_lq_type(rate->type),
rate->index, rs_pretty_ant(rate->ant),
rate->bw, rate->sgi);
rate->bw, rate->sgi, rate->ldpc);
}
static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
@ -742,6 +742,8 @@ static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm,
ucode_rate |= rate->bw;
if (rate->sgi)
ucode_rate |= RATE_MCS_SGI_MSK;
if (rate->ldpc)
ucode_rate |= RATE_MCS_LDPC_MSK;
return ucode_rate;
}
@ -779,6 +781,8 @@ static int rs_rate_from_ucode_rate(const u32 ucode_rate,
/* HT or VHT */
if (ucode_rate & RATE_MCS_SGI_MSK)
rate->sgi = true;
if (ucode_rate & RATE_MCS_LDPC_MSK)
rate->ldpc = true;
rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK;
@ -965,13 +969,13 @@ static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta,
rate->index > IWL_RATE_MCS_9_INDEX);
rate->index = rs_ht_to_legacy[rate->index];
rate->ldpc = false;
} else {
/* Downgrade to SISO with same MCS if in MIMO */
rate->type = is_vht_mimo2(rate) ?
LQ_VHT_SISO : LQ_HT_SISO;
}
if (num_of_ant(rate->ant) > 1)
rate->ant = first_antenna(mvm->fw->valid_tx_ant);
@ -1621,6 +1625,7 @@ static int rs_switch_to_column(struct iwl_mvm *mvm,
}
rate->bw = rs_bw_from_sta_bw(sta);
rate->ldpc = lq_sta->ldpc;
search_tbl->column = col_id;
rs_set_expected_tpt_table(lq_sta, search_tbl);
@ -2342,6 +2347,7 @@ static void rs_initialize_lq(struct iwl_mvm *mvm,
rate->index = i;
rate->ant = first_antenna(valid_tx_ant);
rate->sgi = false;
rate->ldpc = false;
rate->bw = RATE_MCS_CHAN_WIDTH_20;
if (band == IEEE80211_BAND_5GHZ)
rate->type = LQ_LEGACY_A;
@ -2610,9 +2616,16 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;
lq_sta->is_vht = false;
if (mvm->cfg->ht_params->ldpc &&
(ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING))
lq_sta->ldpc = true;
} else {
rs_vht_set_enabled_rates(sta, vht_cap, lq_sta);
lq_sta->is_vht = true;
if (mvm->cfg->ht_params->ldpc &&
(vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))
lq_sta->ldpc = true;
}
lq_sta->max_legacy_rate_idx = find_last_bit(&lq_sta->active_legacy_rate,
@ -2622,11 +2635,12 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
lq_sta->max_mimo2_rate_idx = find_last_bit(&lq_sta->active_mimo2_rate,
BITS_PER_LONG);
IWL_DEBUG_RATE(mvm, "RATE MASK: LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d\n",
IWL_DEBUG_RATE(mvm,
"RATE MASK: LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d\n",
lq_sta->active_legacy_rate,
lq_sta->active_siso_rate,
lq_sta->active_mimo2_rate,
lq_sta->is_vht);
lq_sta->is_vht, lq_sta->ldpc);
IWL_DEBUG_RATE(mvm, "MAX RATE: LEGACY=%d SISO=%d MIMO2=%d\n",
lq_sta->max_legacy_rate_idx,
lq_sta->max_siso_rate_idx,
@ -3032,8 +3046,9 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
(is_ht20(rate)) ? "20MHz" :
(is_ht40(rate)) ? "40MHz" :
(is_ht80(rate)) ? "80Mhz" : "BAD BW");
desc += sprintf(buff+desc, " %s %s\n",
desc += sprintf(buff+desc, " %s %s %s\n",
(rate->sgi) ? "SGI" : "NGI",
(rate->ldpc) ? "LDPC" : "BCC",
(lq_sta->is_agg) ? "AGG on" : "");
}
desc += sprintf(buff+desc, "last tx rate=0x%X\n",

2
drivers/net/wireless/iwlwifi/mvm/rs.h
View File

@ -207,6 +207,7 @@ struct rs_rate {
u8 ant;
u32 bw;
bool sgi;
bool ldpc;
};
@ -329,6 +330,7 @@ struct iwl_lq_sta {
*/
u64 last_tx;
bool is_vht;
bool ldpc; /* LDPC Rx is supported by the STA */
enum ieee80211_band band;
struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT];