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>
diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c
index 17002cf..6a13120 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.c
@@ -505,10 +505,10 @@
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 @@
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 @@
/* 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 @@
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 @@
}
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 @@
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 @@
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 @@
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 @@
(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",
diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.h b/drivers/net/wireless/iwlwifi/mvm/rs.h
index f27b9d6..824a750 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rs.h
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.h
@@ -207,6 +207,7 @@
u8 ant;
u32 bw;
bool sgi;
+ bool ldpc;
};
@@ -329,6 +330,7 @@
*/
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];