diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn-rs.c')
-rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-rs.c | 593 |
1 files changed, 500 insertions, 93 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c index cab7842a73a..ff20e5048a5 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c @@ -52,7 +52,7 @@ /* 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) +#define IWL_RATE_SCALE_FLUSH_INTVL (3*HZ) static u8 rs_ht_to_legacy[] = { IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, @@ -100,6 +100,7 @@ struct iwl_scale_tbl_info { u8 is_fat; /* 1 = 40 MHz channel width */ u8 is_dup; /* 1 = duplicated data streams */ u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ + u8 max_search; /* maximun number of tables we can search */ s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ u32 current_rate; /* rate_n_flags, uCode API format */ struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ @@ -135,7 +136,7 @@ struct iwl_lq_sta { u32 table_count; u32 total_failed; /* total failed frames, any/all rates */ u32 total_success; /* total successful frames, any/all rates */ - u32 flush_timer; /* time staying in mode before new search */ + u64 flush_timer; /* time staying in mode before new search */ u8 action_counter; /* # mode-switch actions tried */ u8 is_green; @@ -160,6 +161,7 @@ struct iwl_lq_sta { #ifdef CONFIG_MAC80211_DEBUGFS struct dentry *rs_sta_dbgfs_scale_table_file; struct dentry *rs_sta_dbgfs_stats_table_file; + struct dentry *rs_sta_dbgfs_rate_scale_data_file; struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file; u32 dbg_fixed_rate; #endif @@ -167,10 +169,12 @@ struct iwl_lq_sta { /* used to be in sta_info */ int last_txrate_idx; + /* last tx rate_n_flags */ + u32 last_rate_n_flags; }; static void rs_rate_scale_perform(struct iwl_priv *priv, - struct ieee80211_hdr *hdr, + struct sk_buff *skb, struct ieee80211_sta *sta, struct iwl_lq_sta *lq_sta); static void rs_fill_link_cmd(const struct iwl_priv *priv, @@ -191,7 +195,7 @@ static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits * "G" is the only table that supports CCK (the first 4 rates). */ -/*FIXME:RS:need to separate tables for MIMO2/MIMO3*/ + static s32 expected_tpt_A[IWL_RATE_COUNT] = { 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 }; @@ -208,11 +212,11 @@ static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 }; -static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { +static s32 expected_tpt_mimo2_20MHz[IWL_RATE_COUNT] = { 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 }; -static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { +static s32 expected_tpt_mimo2_20MHzSGI[IWL_RATE_COUNT] = { 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 }; @@ -224,14 +228,50 @@ static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 }; -static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { +static s32 expected_tpt_mimo2_40MHz[IWL_RATE_COUNT] = { 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 }; -static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { +static s32 expected_tpt_mimo2_40MHzSGI[IWL_RATE_COUNT] = { 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 }; +/* Expected throughput metric MIMO3 */ +static s32 expected_tpt_mimo3_20MHz[IWL_RATE_COUNT] = { + 0, 0, 0, 0, 99, 99, 153, 186, 208, 239, 256, 263, 268 +}; + +static s32 expected_tpt_mimo3_20MHzSGI[IWL_RATE_COUNT] = { + 0, 0, 0, 0, 106, 106, 162, 194, 215, 246, 262, 268, 273 +}; + +static s32 expected_tpt_mimo3_40MHz[IWL_RATE_COUNT] = { + 0, 0, 0, 0, 152, 152, 211, 239, 255, 279, 290, 294, 297 +}; + +static s32 expected_tpt_mimo3_40MHzSGI[IWL_RATE_COUNT] = { + 0, 0, 0, 0, 160, 160, 219, 245, 261, 284, 294, 297, 300 +}; + +/* mbps, mcs */ +const static struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { + {"1", ""}, + {"2", ""}, + {"5.5", ""}, + {"11", ""}, + {"6", "BPSK 1/2"}, + {"9", "BPSK 1/2"}, + {"12", "QPSK 1/2"}, + {"18", "QPSK 3/4"}, + {"24", "16QAM 1/2"}, + {"36", "16QAM 3/4"}, + {"48", "64QAM 2/3"}, + {"54", "64QAM 3/4"}, + {"60", "64QAM 5/6"} +}; + +#define MCS_INDEX_PER_STREAM (8) + static inline u8 rs_extract_rate(u32 rate_n_flags) { return (u8)(rate_n_flags & 0xFF); @@ -543,6 +583,7 @@ static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, tbl->is_dup = 0; tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); tbl->lq_type = LQ_NONE; + tbl->max_search = IWL_MAX_SEARCH; /* legacy rate format */ if (!(rate_n_flags & RATE_MCS_HT_MSK)) { @@ -576,8 +617,10 @@ static int rs_get_tbl_info_from_mcs(const u32 rate_n_flags, tbl->lq_type = LQ_MIMO2; /* MIMO3 */ } else { - if (num_of_ant == 3) + if (num_of_ant == 3) { + tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; tbl->lq_type = LQ_MIMO3; + } } } return 0; @@ -611,19 +654,19 @@ static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, return 1; } -/* FIXME:RS: in 4965 we don't use greenfield at all */ -/* FIXME:RS: don't use greenfield for now in TX */ -#if 0 -static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) +/* in 4965 we don't use greenfield at all */ +static inline u8 rs_use_green(struct iwl_priv *priv, + struct ieee80211_conf *conf) { - return (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && - priv->current_ht_config.is_green_field && - !priv->current_ht_config.non_GF_STA_present; -} -#endif -static inline u8 rs_use_green(struct iwl_priv *priv, struct ieee80211_conf *conf) -{ - return 0; + u8 is_green; + + if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965) + is_green = 0; + else + is_green = (conf_is_ht(conf) && + priv->current_ht_config.is_green_field && + !priv->current_ht_config.non_GF_STA_present); + return is_green; } /** @@ -735,6 +778,7 @@ static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, tbl->is_fat = 0; tbl->is_SGI = 0; + tbl->max_search = IWL_MAX_SEARCH; } rate_mask = rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); @@ -793,7 +837,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); if (!ieee80211_is_data(hdr->frame_control) || - is_multicast_ether_addr(hdr->addr1)) + info->flags & IEEE80211_TX_CTL_NO_ACK) return; /* This packet was aggregated but doesn't carry rate scale info */ @@ -902,6 +946,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, * else look up the rate that was, finally, successful. */ tx_rate = le32_to_cpu(table->rs_table[index].rate_n_flags); + lq_sta->last_rate_n_flags = tx_rate; rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); /* Update frame history window with "success" if Tx got ACKed ... */ @@ -958,7 +1003,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, /* See if there's a better rate or modulation mode to try. */ if (sta && sta->supp_rates[sband->band]) - rs_rate_scale_perform(priv, hdr, sta, lq_sta); + rs_rate_scale_perform(priv, skb, sta, lq_sta); out: return; } @@ -988,6 +1033,8 @@ static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, lq_sta->table_count = 0; lq_sta->total_failed = 0; lq_sta->total_success = 0; + lq_sta->flush_timer = jiffies; + lq_sta->action_counter = 0; } /* @@ -1011,17 +1058,26 @@ static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, tbl->expected_tpt = expected_tpt_siso20MHzSGI; else tbl->expected_tpt = expected_tpt_siso20MHz; - - } else if (is_mimo(tbl->lq_type)) { /* FIXME:need to separate mimo2/3 */ + } else if (is_mimo2(tbl->lq_type)) { if (tbl->is_fat && !lq_sta->is_dup) if (tbl->is_SGI) - tbl->expected_tpt = expected_tpt_mimo40MHzSGI; + tbl->expected_tpt = expected_tpt_mimo2_40MHzSGI; else - tbl->expected_tpt = expected_tpt_mimo40MHz; + tbl->expected_tpt = expected_tpt_mimo2_40MHz; else if (tbl->is_SGI) - tbl->expected_tpt = expected_tpt_mimo20MHzSGI; + tbl->expected_tpt = expected_tpt_mimo2_20MHzSGI; else - tbl->expected_tpt = expected_tpt_mimo20MHz; + tbl->expected_tpt = expected_tpt_mimo2_20MHz; + } else if (is_mimo3(tbl->lq_type)) { + if (tbl->is_fat && !lq_sta->is_dup) + if (tbl->is_SGI) + tbl->expected_tpt = expected_tpt_mimo3_40MHzSGI; + else + tbl->expected_tpt = expected_tpt_mimo3_40MHz; + else if (tbl->is_SGI) + tbl->expected_tpt = expected_tpt_mimo3_20MHzSGI; + else + tbl->expected_tpt = expected_tpt_mimo3_20MHz; } else tbl->expected_tpt = expected_tpt_G; } @@ -1130,7 +1186,7 @@ static s32 rs_get_best_rate(struct iwl_priv *priv, } /* - * Set up search table for MIMO + * Set up search table for MIMO2 */ static int rs_switch_to_mimo2(struct iwl_priv *priv, struct iwl_lq_sta *lq_sta, @@ -1158,10 +1214,10 @@ static int rs_switch_to_mimo2(struct iwl_priv *priv, tbl->lq_type = LQ_MIMO2; tbl->is_dup = lq_sta->is_dup; tbl->action = 0; + tbl->max_search = IWL_MAX_SEARCH; rate_mask = lq_sta->active_mimo2_rate; - if (priv->current_ht_config.supported_chan_width - == IWL_CHANNEL_WIDTH_40MHZ) + if (iwl_is_fat_tx_allowed(priv, &sta->ht_cap)) tbl->is_fat = 1; else tbl->is_fat = 0; @@ -1183,7 +1239,73 @@ static int rs_switch_to_mimo2(struct iwl_priv *priv, rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); + if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { + IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", + rate, rate_mask); + return -1; + } + tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); + + IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", + tbl->current_rate, is_green); + return 0; +} + +/* + * Set up search table for MIMO3 + */ +static int rs_switch_to_mimo3(struct iwl_priv *priv, + struct iwl_lq_sta *lq_sta, + struct ieee80211_conf *conf, + struct ieee80211_sta *sta, + struct iwl_scale_tbl_info *tbl, int index) +{ + u16 rate_mask; + s32 rate; + s8 is_green = lq_sta->is_green; + + if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) + return -1; + + if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) + == WLAN_HT_CAP_SM_PS_STATIC) + return -1; + + /* Need both Tx chains/antennas to support MIMO */ + if (priv->hw_params.tx_chains_num < 3) + return -1; + + IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n"); + + tbl->lq_type = LQ_MIMO3; + tbl->is_dup = lq_sta->is_dup; + tbl->action = 0; + tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; + rate_mask = lq_sta->active_mimo3_rate; + + if (iwl_is_fat_tx_allowed(priv, &sta->ht_cap)) + tbl->is_fat = 1; + else + tbl->is_fat = 0; + /* FIXME: - don't toggle SGI here + if (tbl->is_fat) { + if (priv->current_ht_config.sgf & HT_SHORT_GI_40MHZ_ONLY) + tbl->is_SGI = 1; + else + tbl->is_SGI = 0; + } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) + tbl->is_SGI = 1; + else + tbl->is_SGI = 0; + */ + + rs_set_expected_tpt_table(lq_sta, tbl); + + rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); + + IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n", + rate, rate_mask); if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", rate, rate_mask); @@ -1217,10 +1339,10 @@ static int rs_switch_to_siso(struct iwl_priv *priv, tbl->is_dup = lq_sta->is_dup; tbl->lq_type = LQ_SISO; tbl->action = 0; + tbl->max_search = IWL_MAX_SEARCH; rate_mask = lq_sta->active_siso_rate; - if (priv->current_ht_config.supported_chan_width - == IWL_CHANNEL_WIDTH_40MHZ) + if (iwl_is_fat_tx_allowed(priv, &sta->ht_cap)) tbl->is_fat = 1; else tbl->is_fat = 0; @@ -1274,15 +1396,15 @@ static int rs_move_legacy_other(struct iwl_priv *priv, u8 valid_tx_ant = priv->hw_params.valid_tx_ant; u8 tx_chains_num = priv->hw_params.tx_chains_num; int ret = 0; + u8 update_search_tbl_counter = 0; for (; ;) { + lq_sta->action_counter++; switch (tbl->action) { case IWL_LEGACY_SWITCH_ANTENNA1: case IWL_LEGACY_SWITCH_ANTENNA2: IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); - lq_sta->action_counter++; - if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && tx_chains_num <= 1) || (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && @@ -1298,6 +1420,7 @@ static int rs_move_legacy_other(struct iwl_priv *priv, if (rs_toggle_antenna(valid_tx_ant, &search_tbl->current_rate, search_tbl)) { + update_search_tbl_counter = 1; rs_set_expected_tpt_table(lq_sta, search_tbl); goto out; } @@ -1342,9 +1465,29 @@ static int rs_move_legacy_other(struct iwl_priv *priv, goto out; } break; + + case IWL_LEGACY_SWITCH_MIMO3_ABC: + IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n"); + + /* Set up search table to try MIMO3 */ + memcpy(search_tbl, tbl, sz); + search_tbl->is_SGI = 0; + + search_tbl->ant_type = ANT_ABC; + + if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) + break; + + ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, + search_tbl, index); + if (!ret) { + lq_sta->action_counter = 0; + goto out; + } + break; } tbl->action++; - if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) + if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; if (tbl->action == start_action) @@ -1357,8 +1500,10 @@ static int rs_move_legacy_other(struct iwl_priv *priv, out: lq_sta->search_better_tbl = 1; tbl->action++; - if (tbl->action > IWL_LEGACY_SWITCH_MIMO2_BC) + if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; + if (update_search_tbl_counter) + search_tbl->action = tbl->action; return 0; } @@ -1381,6 +1526,7 @@ static int rs_move_siso_to_other(struct iwl_priv *priv, u8 start_action = tbl->action; u8 valid_tx_ant = priv->hw_params.valid_tx_ant; u8 tx_chains_num = priv->hw_params.tx_chains_num; + u8 update_search_tbl_counter = 0; int ret; for (;;) { @@ -1401,8 +1547,10 @@ static int rs_move_siso_to_other(struct iwl_priv *priv, memcpy(search_tbl, tbl, sz); if (rs_toggle_antenna(valid_tx_ant, - &search_tbl->current_rate, search_tbl)) + &search_tbl->current_rate, search_tbl)) { + update_search_tbl_counter = 1; goto out; + } break; case IWL_SISO_SWITCH_MIMO2_AB: case IWL_SISO_SWITCH_MIMO2_AC: @@ -1456,10 +1604,25 @@ static int rs_move_siso_to_other(struct iwl_priv *priv, search_tbl->current_rate = rate_n_flags_from_tbl(priv, search_tbl, index, is_green); + update_search_tbl_counter = 1; goto out; + case IWL_SISO_SWITCH_MIMO3_ABC: + IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n"); + memcpy(search_tbl, tbl, sz); + search_tbl->is_SGI = 0; + search_tbl->ant_type = ANT_ABC; + + if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) + break; + + ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, + search_tbl, index); + if (!ret) + goto out; + break; } tbl->action++; - if (tbl->action > IWL_SISO_SWITCH_GI) + if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) tbl->action = IWL_SISO_SWITCH_ANTENNA1; if (tbl->action == start_action) @@ -1471,15 +1634,18 @@ static int rs_move_siso_to_other(struct iwl_priv *priv, out: lq_sta->search_better_tbl = 1; tbl->action++; - if (tbl->action > IWL_SISO_SWITCH_GI) + if (tbl->action > IWL_SISO_SWITCH_MIMO3_ABC) tbl->action = IWL_SISO_SWITCH_ANTENNA1; + if (update_search_tbl_counter) + search_tbl->action = tbl->action; + return 0; } /* - * Try to switch to new modulation mode from MIMO + * Try to switch to new modulation mode from MIMO2 */ -static int rs_move_mimo_to_other(struct iwl_priv *priv, +static int rs_move_mimo2_to_other(struct iwl_priv *priv, struct iwl_lq_sta *lq_sta, struct ieee80211_conf *conf, struct ieee80211_sta *sta, int index) @@ -1494,6 +1660,7 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv, u8 start_action = tbl->action; u8 valid_tx_ant = priv->hw_params.valid_tx_ant; u8 tx_chains_num = priv->hw_params.tx_chains_num; + u8 update_search_tbl_counter = 0; int ret; for (;;) { @@ -1501,7 +1668,7 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv, switch (tbl->action) { case IWL_MIMO2_SWITCH_ANTENNA1: case IWL_MIMO2_SWITCH_ANTENNA2: - IWL_DEBUG_RATE(priv, "LQ: MIMO toggle Antennas\n"); + IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n"); if (tx_chains_num <= 2) break; @@ -1511,8 +1678,10 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv, memcpy(search_tbl, tbl, sz); if (rs_toggle_antenna(valid_tx_ant, - &search_tbl->current_rate, search_tbl)) + &search_tbl->current_rate, search_tbl)) { + update_search_tbl_counter = 1; goto out; + } break; case IWL_MIMO2_SWITCH_SISO_A: case IWL_MIMO2_SWITCH_SISO_B: @@ -1549,9 +1718,9 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv, HT_SHORT_GI_40MHZ)) break; - IWL_DEBUG_RATE(priv, "LQ: MIMO toggle SGI/NGI\n"); + IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle SGI/NGI\n"); - /* Set up new search table for MIMO */ + /* Set up new search table for MIMO2 */ memcpy(search_tbl, tbl, sz); search_tbl->is_SGI = !tbl->is_SGI; rs_set_expected_tpt_table(lq_sta, search_tbl); @@ -1569,11 +1738,27 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv, search_tbl->current_rate = rate_n_flags_from_tbl(priv, search_tbl, index, is_green); + update_search_tbl_counter = 1; goto out; + case IWL_MIMO2_SWITCH_MIMO3_ABC: + IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n"); + memcpy(search_tbl, tbl, sz); + search_tbl->is_SGI = 0; + search_tbl->ant_type = ANT_ABC; + + if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) + break; + + ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, + search_tbl, index); + if (!ret) + goto out; + + break; } tbl->action++; - if (tbl->action > IWL_MIMO2_SWITCH_GI) + if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; if (tbl->action == start_action) @@ -1584,8 +1769,153 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv, out: lq_sta->search_better_tbl = 1; tbl->action++; - if (tbl->action > IWL_MIMO2_SWITCH_GI) + if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; + if (update_search_tbl_counter) + search_tbl->action = tbl->action; + + return 0; + +} + +/* + * Try to switch to new modulation mode from MIMO3 + */ +static int rs_move_mimo3_to_other(struct iwl_priv *priv, + struct iwl_lq_sta *lq_sta, + struct ieee80211_conf *conf, + 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)]); + struct iwl_rate_scale_data *window = &(tbl->win[index]); + u32 sz = (sizeof(struct iwl_scale_tbl_info) - + (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); + u8 start_action = tbl->action; + u8 valid_tx_ant = priv->hw_params.valid_tx_ant; + u8 tx_chains_num = priv->hw_params.tx_chains_num; + int ret; + u8 update_search_tbl_counter = 0; + + for (;;) { + lq_sta->action_counter++; + switch (tbl->action) { + case IWL_MIMO3_SWITCH_ANTENNA1: + case IWL_MIMO3_SWITCH_ANTENNA2: + IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n"); + + if (tx_chains_num <= 3) + break; + + if (window->success_ratio >= IWL_RS_GOOD_RATIO) + break; + + memcpy(search_tbl, tbl, sz); + if (rs_toggle_antenna(valid_tx_ant, + &search_tbl->current_rate, search_tbl)) + goto out; + break; + case IWL_MIMO3_SWITCH_SISO_A: + case IWL_MIMO3_SWITCH_SISO_B: + case IWL_MIMO3_SWITCH_SISO_C: + IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n"); + + /* Set up new search table for SISO */ + memcpy(search_tbl, tbl, sz); + + if (tbl->action == IWL_MIMO3_SWITCH_SISO_A) + search_tbl->ant_type = ANT_A; + else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B) + search_tbl->ant_type = ANT_B; + else + search_tbl->ant_type = ANT_C; + + if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) + break; + + ret = rs_switch_to_siso(priv, lq_sta, conf, sta, + search_tbl, index); + if (!ret) + goto out; + + break; + + case IWL_MIMO3_SWITCH_MIMO2_AB: + case IWL_MIMO3_SWITCH_MIMO2_AC: + case IWL_MIMO3_SWITCH_MIMO2_BC: + IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n"); + + memcpy(search_tbl, tbl, sz); + search_tbl->is_SGI = 0; + if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB) + search_tbl->ant_type = ANT_AB; + else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC) + search_tbl->ant_type = ANT_AC; + else + search_tbl->ant_type = ANT_BC; + + if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) + break; + + ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, + search_tbl, index); + if (!ret) + goto out; + + break; + + case IWL_MIMO3_SWITCH_GI: + if (!tbl->is_fat && + !(priv->current_ht_config.sgf & + HT_SHORT_GI_20MHZ)) + break; + if (tbl->is_fat && + !(priv->current_ht_config.sgf & + HT_SHORT_GI_40MHZ)) + break; + + IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n"); + + /* Set up new search table for MIMO */ + memcpy(search_tbl, tbl, sz); + search_tbl->is_SGI = !tbl->is_SGI; + rs_set_expected_tpt_table(lq_sta, search_tbl); + /* + * If active table already uses the fastest possible + * modulation (dual stream with short guard interval), + * and it's working well, there's no need to look + * for a better type of modulation! + */ + if (tbl->is_SGI) { + s32 tpt = lq_sta->last_tpt / 100; + if (tpt >= search_tbl->expected_tpt[index]) + break; + } + search_tbl->current_rate = + rate_n_flags_from_tbl(priv, search_tbl, + index, is_green); + update_search_tbl_counter = 1; + goto out; + } + tbl->action++; + if (tbl->action > IWL_MIMO3_SWITCH_GI) + tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; + + if (tbl->action == start_action) + break; + } + search_tbl->lq_type = LQ_NONE; + return 0; + out: + lq_sta->search_better_tbl = 1; + tbl->action++; + if (tbl->action > IWL_MIMO3_SWITCH_GI) + tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; + if (update_search_tbl_counter) + search_tbl->action = tbl->action; + return 0; } @@ -1616,8 +1946,8 @@ static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) /* Elapsed time using current modulation mode */ if (lq_sta->flush_timer) flush_interval_passed = - time_after(jiffies, - (unsigned long)(lq_sta->flush_timer + + time_after(jiffies, + (unsigned long)(lq_sta->flush_timer + IWL_RATE_SCALE_FLUSH_INTVL)); /* @@ -1676,12 +2006,14 @@ static void rs_stay_in_table(struct iwl_lq_sta *lq_sta) * Do rate scaling and search for new modulation mode. */ static void rs_rate_scale_perform(struct iwl_priv *priv, - struct ieee80211_hdr *hdr, + struct sk_buff *skb, struct ieee80211_sta *sta, struct iwl_lq_sta *lq_sta) { struct ieee80211_hw *hw = priv->hw; struct ieee80211_conf *conf = &hw->conf; + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; int low = IWL_RATE_INVALID; int high = IWL_RATE_INVALID; int index; @@ -1707,11 +2039,10 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, IWL_DEBUG_RATE(priv, "rate scale calculate new rate for skb\n"); - /* Send management frames and broadcast/multicast data using - * lowest rate. */ + /* Send management frames and NO_ACK data using lowest rate. */ /* TODO: this could probably be improved.. */ if (!ieee80211_is_data(hdr->frame_control) || - is_multicast_ether_addr(hdr->addr1)) + info->flags & IEEE80211_TX_CTL_NO_ACK) return; if (!sta || !lq_sta) @@ -1732,6 +2063,10 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, 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(priv, conf); is_green = lq_sta->is_green; /* current tx rate */ @@ -1951,6 +2286,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, update_lq = 1; index = low; } + break; case 1: /* Increase starting rate, update uCode's rate table */ @@ -1997,8 +2333,10 @@ lq_update: rs_move_legacy_other(priv, lq_sta, conf, sta, index); else if (is_siso(tbl->lq_type)) rs_move_siso_to_other(priv, lq_sta, conf, sta, index); + else if (is_mimo2(tbl->lq_type)) + rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index); else - rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); + rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index); /* If new "search" mode was selected, set up in uCode table */ if (lq_sta->search_better_tbl) { @@ -2014,8 +2352,11 @@ lq_update: tbl->current_rate, index); rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); - } + } else + done_search = 1; + } + if (done_search && !lq_sta->stay_in_tbl) { /* If the "active" (non-search) mode was legacy, * and we've tried switching antennas, * but we haven't been able to try HT modes (not available), @@ -2023,8 +2364,7 @@ lq_update: * before next round of mode comparisons. */ tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); if (is_legacy(tbl1->lq_type) && !conf_is_ht(conf) && - lq_sta->action_counter >= 1) { - lq_sta->action_counter = 0; + lq_sta->action_counter > tbl1->max_search) { IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); rs_set_stay_in_table(priv, 1, lq_sta); } @@ -2033,7 +2373,7 @@ lq_update: * have been tried and compared, stay in this best modulation * mode for a while before next round of mode comparisons. */ if (lq_sta->enable_counter && - (lq_sta->action_counter >= IWL_ACTION_LIMIT)) { + (lq_sta->action_counter >= tbl1->max_search)) { if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && (lq_sta->tx_agg_tid_en & (1 << tid)) && (tid != MAX_TID_COUNT)) { @@ -2047,20 +2387,8 @@ lq_update: lq_sta, sta); } } - lq_sta->action_counter = 0; rs_set_stay_in_table(priv, 0, lq_sta); } - - /* - * Else, don't search for a new modulation mode. - * Put new timestamp in stay-in-modulation-mode flush timer if: - * 1) Not changing rates right now - * 2) Not just finishing up a search - * 3) flush timer is empty - */ - } else { - if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) - lq_sta->flush_timer = jiffies; } out: @@ -2156,16 +2484,17 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, if (sta) mask_bit = sta->supp_rates[sband->band]; - /* Send management frames and broadcast/multicast data using lowest - * rate. */ + /* Send management frames and NO_ACK data using lowest rate. */ if (!ieee80211_is_data(hdr->frame_control) || - is_multicast_ether_addr(hdr->addr1) || !sta || !lq_sta) { + info->flags & IEEE80211_TX_CTL_NO_ACK || !sta || !lq_sta) { if (!mask_bit) info->control.rates[0].idx = rate_lowest_index(sband, NULL); else info->control.rates[0].idx = rate_lowest_index(sband, sta); + if (info->flags & IEEE80211_TX_CTL_NO_ACK) + info->control.rates[0].count = 1; return; } @@ -2178,8 +2507,8 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, if (sta_id == IWL_INVALID_STATION) { IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", hdr->addr1); - sta_id = iwl_add_station_flags(priv, hdr->addr1, - 0, CMD_ASYNC, NULL); + sta_id = iwl_add_station(priv, hdr->addr1, + false, CMD_ASYNC, NULL); } if ((sta_id != IWL_INVALID_STATION)) { lq_sta->lq.sta_id = sta_id; @@ -2189,12 +2518,33 @@ static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, } } - if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT) - rate_idx = rate_lowest_index(sband, sta); - else if (sband->band == IEEE80211_BAND_5GHZ) + if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { rate_idx -= IWL_FIRST_OFDM_RATE; - + /* 6M and 9M shared same MCS index */ + rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; + if (rs_extract_rate(lq_sta->last_rate_n_flags) >= + IWL_RATE_MIMO3_6M_PLCP) + rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM); + else if (rs_extract_rate(lq_sta->last_rate_n_flags) >= + IWL_RATE_MIMO2_6M_PLCP) + rate_idx = rate_idx + MCS_INDEX_PER_STREAM; + info->control.rates[0].flags = IEEE80211_TX_RC_MCS; + if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) + info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI; + if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) + info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA; + if (lq_sta->last_rate_n_flags & RATE_MCS_FAT_MSK) + info->control.rates[0].flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; + if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) + info->control.rates[0].flags |= IEEE80211_TX_RC_GREEN_FIELD; + } else { + if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT) + rate_idx = rate_lowest_index(sband, sta); + else if (sband->band == IEEE80211_BAND_5GHZ) + rate_idx -= IWL_FIRST_OFDM_RATE; + } info->control.rates[0].idx = rate_idx; + } static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, @@ -2246,15 +2596,16 @@ static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband, lq_sta->ibss_sta_added = 0; if (priv->iw_mode == NL80211_IFTYPE_AP) { - u8 sta_id = iwl_find_station(priv, sta->addr); + u8 sta_id = iwl_find_station(priv, + sta->addr); /* for IBSS the call are from tasklet */ IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); if (sta_id == IWL_INVALID_STATION) { IWL_DEBUG_RATE(priv, "LQ: ADD station %pM\n", sta->addr); - sta_id = iwl_add_station_flags(priv, sta->addr, - 0, CMD_ASYNC, NULL); + sta_id = iwl_add_station(priv, sta->addr, false, + CMD_ASYNC, NULL); } if ((sta_id != IWL_INVALID_STATION)) { lq_sta->lq.sta_id = sta_id; @@ -2436,9 +2787,10 @@ static void rs_fill_link_cmd(const struct iwl_priv *priv, repeat_rate--; } - lq_cmd->agg_params.agg_frame_cnt_limit = 64; - lq_cmd->agg_params.agg_dis_start_th = 3; - lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); + lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_MAX; + lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; + lq_cmd->agg_params.agg_time_limit = + cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); } static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) @@ -2539,6 +2891,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, char *buff; int desc = 0; int i = 0; + int index = 0; ssize_t ret; struct iwl_lq_sta *lq_sta = file->private_data; @@ -2568,8 +2921,11 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3")); desc += sprintf(buff+desc, " %s", (tbl->is_fat) ? "40MHz" : "20MHz"); - desc += sprintf(buff+desc, " %s\n", (tbl->is_SGI) ? "SGI" : ""); + desc += sprintf(buff+desc, " %s %s\n", (tbl->is_SGI) ? "SGI" : "", + (lq_sta->is_green) ? "GF enabled" : ""); } + desc += sprintf(buff+desc, "last tx rate=0x%X\n", + lq_sta->last_rate_n_flags); desc += sprintf(buff+desc, "general:" "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", lq_sta->lq.general_params.flags, @@ -2590,10 +2946,19 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, lq_sta->lq.general_params.start_rate_index[2], lq_sta->lq.general_params.start_rate_index[3]); - - for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) - desc += sprintf(buff+desc, " rate[%d] 0x%X\n", - i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); + for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { + index = iwl_hwrate_to_plcp_idx( + le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); + if (is_legacy(tbl->lq_type)) { + desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", + i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), + iwl_rate_mcs[index].mbps); + } else { + desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n", + i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), + iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs); + } + } ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); kfree(buff); @@ -2620,13 +2985,14 @@ static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, return -ENOMEM; for (i = 0; i < LQ_SIZE; i++) { - desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" + desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d GF=%d\n" "rate=0x%X\n", lq_sta->active_tbl == i ? "*" : "x", lq_sta->lq_info[i].lq_type, lq_sta->lq_info[i].is_SGI, lq_sta->lq_info[i].is_fat, lq_sta->lq_info[i].is_dup, + lq_sta->is_green, lq_sta->lq_info[i].current_rate); for (j = 0; j < IWL_RATE_COUNT; j++) { desc += sprintf(buff+desc, @@ -2646,6 +3012,43 @@ static const struct file_operations rs_sta_dbgfs_stats_table_ops = { .open = open_file_generic, }; +static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file, + char __user *user_buf, size_t count, loff_t *ppos) +{ + char buff[120]; + int desc = 0; + ssize_t ret; + + struct iwl_lq_sta *lq_sta = file->private_data; + struct iwl_priv *priv; + struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; + + priv = lq_sta->drv; + + if (is_Ht(tbl->lq_type)) + desc += sprintf(buff+desc, + "Bit Rate= %d Mb/s\n", + tbl->expected_tpt[lq_sta->last_txrate_idx]); + else + desc += sprintf(buff+desc, + "Bit Rate= %d Mb/s\n", + iwl_rates[lq_sta->last_txrate_idx].ieee >> 1); + desc += sprintf(buff+desc, + "Signal Level= %d dBm\tNoise Level= %d dBm\n", + priv->last_rx_rssi, priv->last_rx_noise); + desc += sprintf(buff+desc, + "Tsf= 0x%llx\tBeacon time= 0x%08X\n", + priv->last_tsf, priv->last_beacon_time); + + ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); + return ret; +} + +static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { + .read = rs_sta_dbgfs_rate_scale_data_read, + .open = open_file_generic, +}; + static void rs_add_debugfs(void *priv, void *priv_sta, struct dentry *dir) { @@ -2656,6 +3059,9 @@ static void rs_add_debugfs(void *priv, void *priv_sta, lq_sta->rs_sta_dbgfs_stats_table_file = debugfs_create_file("rate_stats_table", 0600, dir, lq_sta, &rs_sta_dbgfs_stats_table_ops); + lq_sta->rs_sta_dbgfs_rate_scale_data_file = + debugfs_create_file("rate_scale_data", 0600, dir, + lq_sta, &rs_sta_dbgfs_rate_scale_data_ops); lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = debugfs_create_u8("tx_agg_tid_enable", 0600, dir, &lq_sta->tx_agg_tid_en); @@ -2667,6 +3073,7 @@ static void rs_remove_debugfs(void *priv, void *priv_sta) struct iwl_lq_sta *lq_sta = priv_sta; debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); + debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); } #endif |