From 8fc7c58c037b1793b07aa3111d125b36f31f5681 Mon Sep 17 00:00:00 2001 From: Eyal Shapira Date: Wed, 4 Dec 2013 02:15:46 +0200 Subject: [PATCH] iwlwifi: mvm: rs: refactor building the LQ command Simplify the code a bit more by extracting the rates table building logic into a separate function and handle setting a fixed rate for debug in a separate flow. Also avoid using and saving ucode rate format in different places. Instead use rs_rate struct and convert to ucode format only when filling the rates table in the LQ command. Signed-off-by: Eyal Shapira Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/mvm/rs.c | 185 ++++++++++++-------------- drivers/net/wireless/iwlwifi/mvm/rs.h | 1 - 2 files changed, 82 insertions(+), 104 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c index 83306a05ceaf..eee3381048b2 100644 --- a/drivers/net/wireless/iwlwifi/mvm/rs.c +++ b/drivers/net/wireless/iwlwifi/mvm/rs.c @@ -351,20 +351,12 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_sta *sta, struct iwl_lq_sta *lq_sta); -static void rs_fill_link_cmd(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, u32 rate_n_flags); +static void rs_fill_lq_cmd(struct iwl_mvm *mvm, + struct ieee80211_sta *sta, + struct iwl_lq_sta *lq_sta, + const struct rs_rate *initial_rate); static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search); -#ifdef CONFIG_MAC80211_DEBUGFS -static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, - u32 *rate_n_flags); -#else -static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, - u32 *rate_n_flags) -{} -#endif - /** * The following tables contain the expected throughput metrics for all rates * @@ -634,7 +626,7 @@ static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl, /* Convert rs_rate object into ucode rate bitmask */ static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm, - struct rs_rate *rate) + struct rs_rate *rate) { u32 ucode_rate = 0; int index = rate->index; @@ -761,8 +753,7 @@ static int rs_rate_from_ucode_rate(const u32 ucode_rate, /* switch to another antenna/antennas and return 1 */ /* if no other valid antenna found, return 0 */ -static int rs_toggle_antenna(u32 valid_ant, u32 *ucode_rate, - struct rs_rate *rate) +static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate) { u8 new_ant_type; @@ -783,9 +774,6 @@ static int rs_toggle_antenna(u32 valid_ant, u32 *ucode_rate, rate->ant = new_ant_type; - /* TODO: get rid of ucode_rate here. This should handle only rs_rate */ - *ucode_rate &= ~RATE_MCS_ANT_ABC_MSK; - *ucode_rate |= new_ant_type << RATE_MCS_ANT_POS; return 1; } @@ -859,9 +847,9 @@ static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask, return (high << 8) | low; } -static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, - struct rs_rate *rate, - u8 scale_index, u8 ht_possible) +static void rs_get_lower_rate(struct iwl_lq_sta *lq_sta, + struct rs_rate *rate, + u8 scale_index, u8 ht_possible) { s32 low; u16 rate_mask; @@ -917,7 +905,6 @@ static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, out: rate->index = low; - return ucode_rate_from_rs_rate(lq_sta->drv, rate); } /* Simple function to compare two rate scale table types */ @@ -1447,10 +1434,7 @@ static void rs_update_rate_tbl(struct iwl_mvm *mvm, struct iwl_lq_sta *lq_sta, struct rs_rate *rate) { - u32 ucode_rate; - - ucode_rate = ucode_rate_from_rs_rate(mvm, rate); - rs_fill_link_cmd(mvm, sta, lq_sta, ucode_rate); + rs_fill_lq_cmd(mvm, sta, lq_sta, rate); iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); } @@ -1610,10 +1594,6 @@ static int rs_switch_to_column(struct iwl_mvm *mvm, rate->index = rate_idx; } - /* TODO: remove current_rate and keep using rs_rate all the way until - * we need to fill in the rs_table in the LQ command - */ - search_tbl->current_rate = ucode_rate_from_rs_rate(mvm, rate); IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n", col_id, rate->index); @@ -1730,9 +1710,6 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm, rate->type = LQ_NONE; lq_sta->search_better_tbl = 0; tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); - /* get "active" rate info */ - index = iwl_hwrate_to_plcp_idx(tbl->current_rate); - tbl->rate.index = index; rs_update_rate_tbl(mvm, sta, lq_sta, &tbl->rate); } return; @@ -1823,7 +1800,7 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm, tbl = &(lq_sta->lq_info[active_tbl]); /* Revert to "active" rate and throughput info */ - index = iwl_hwrate_to_plcp_idx(tbl->current_rate); + index = tbl->rate.index; current_tpt = lq_sta->last_tpt; /* Need to set up a new rate table in uCode */ @@ -2029,11 +2006,11 @@ lq_update: rs_rate_scale_clear_window(&(tbl->win[i])); /* Use new "search" start rate */ - index = iwl_hwrate_to_plcp_idx(tbl->current_rate); + index = tbl->rate.index; rs_dump_rate(mvm, &tbl->rate, "Switch to SEARCH TABLE:"); - rs_fill_link_cmd(mvm, sta, lq_sta, tbl->current_rate); + rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate); iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); } else { done_search = 1; @@ -2071,8 +2048,6 @@ lq_update: } out: - tbl->rate.index = index; - tbl->current_rate = ucode_rate_from_rs_rate(mvm, &tbl->rate); lq_sta->last_txrate_idx = index; } @@ -2099,7 +2074,6 @@ static void rs_initialize_lq(struct iwl_mvm *mvm, struct iwl_scale_tbl_info *tbl; struct rs_rate *rate; int i; - u32 ucode_rate; u8 active_tbl = 0; u8 valid_tx_ant; @@ -2130,9 +2104,6 @@ static void rs_initialize_lq(struct iwl_mvm *mvm, else rate->type = LQ_LEGACY_G; - ucode_rate = ucode_rate_from_rs_rate(mvm, rate); - tbl->current_rate = ucode_rate; - WARN_ON_ONCE(rate->ant != ANT_A && rate->ant != ANT_B); if (rate->ant == ANT_A) tbl->column = RS_COLUMN_LEGACY_ANT_A; @@ -2140,7 +2111,7 @@ static void rs_initialize_lq(struct iwl_mvm *mvm, tbl->column = RS_COLUMN_LEGACY_ANT_B; rs_set_expected_tpt_table(lq_sta, tbl); - rs_fill_link_cmd(NULL, NULL, lq_sta, ucode_rate); + rs_fill_lq_cmd(NULL, NULL, lq_sta, rate); /* TODO restore station should remember the lq cmd */ iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init); } @@ -2371,9 +2342,32 @@ static void rs_rate_update(void *mvm_r, iwl_mvm_rs_rate_init(mvm, sta, sband->band, false); } -static void rs_fill_link_cmd(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, u32 new_rate) +#ifdef CONFIG_MAC80211_DEBUGFS +static void rs_build_rates_table_from_fixed(struct iwl_mvm *mvm, + struct iwl_lq_cmd *lq_cmd, + enum ieee80211_band band, + u32 ucode_rate) +{ + struct rs_rate rate; + int i; + int num_rates = ARRAY_SIZE(lq_cmd->rs_table); + __le32 ucode_rate_le32 = cpu_to_le32(ucode_rate); + + for (i = 0; i < num_rates; i++) + lq_cmd->rs_table[i] = ucode_rate_le32; + + rs_rate_from_ucode_rate(ucode_rate, band, &rate); + + if (is_mimo(&rate)) + lq_cmd->mimo_delim = num_rates - 1; + else + lq_cmd->mimo_delim = 0; +} +#endif /* CONFIG_MAC80211_DEBUGFS */ + +static void rs_build_rates_table(struct iwl_mvm *mvm, + struct iwl_lq_sta *lq_sta, + const struct rs_rate *initial_rate) { struct rs_rate rate; int index = 0; @@ -2383,10 +2377,13 @@ static void rs_fill_link_cmd(struct iwl_mvm *mvm, u8 valid_tx_ant = 0; struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; - /* Override starting rate (index 0) if needed for debug purposes */ - rs_dbgfs_set_mcs(lq_sta, &new_rate); + memcpy(&rate, initial_rate, sizeof(struct rs_rate)); + + lq_cmd->mimo_delim = is_mimo(&rate) ? 1 : 0; - rs_rate_from_ucode_rate(new_rate, lq_sta->band, &rate); + /* Fill 1st table entry (index 0) */ + lq_cmd->rs_table[index] = cpu_to_le32( + ucode_rate_from_rs_rate(mvm, &rate)); /* How many times should we repeat the initial rate? */ if (is_legacy(&rate)) { @@ -2397,15 +2394,6 @@ static void rs_fill_link_cmd(struct iwl_mvm *mvm, LINK_QUAL_AGG_DISABLE_START_DEF - 1); } - lq_cmd->mimo_delim = is_mimo(&rate) ? 1 : 0; - - /* Fill 1st table entry (index 0) */ - lq_cmd->rs_table[index] = cpu_to_le32(new_rate); - - if (num_of_ant(rate.ant) == 1) - lq_cmd->single_stream_ant_msk = rate.ant; - /* otherwise we don't modify the existing value */ - index++; repeat_rate--; if (mvm) @@ -2421,23 +2409,17 @@ static void rs_fill_link_cmd(struct iwl_mvm *mvm, if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) ant_toggle_cnt++; else if (mvm && - rs_toggle_antenna(valid_tx_ant, - &new_rate, &rate)) + rs_toggle_antenna(valid_tx_ant, &rate)) ant_toggle_cnt = 1; } - /* Override next rate if needed for debug purposes */ - rs_dbgfs_set_mcs(lq_sta, &new_rate); - /* Fill next table entry */ - lq_cmd->rs_table[index] = - cpu_to_le32(new_rate); + lq_cmd->rs_table[index] = cpu_to_le32( + ucode_rate_from_rs_rate(mvm, &rate)); repeat_rate--; index++; } - rs_rate_from_ucode_rate(new_rate, lq_sta->band, &rate); - /* Indicate to uCode which entries might be MIMO. * If initial rate was MIMO, this will finally end up * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ @@ -2445,16 +2427,14 @@ static void rs_fill_link_cmd(struct iwl_mvm *mvm, lq_cmd->mimo_delim = index; /* Get next rate */ - new_rate = rs_get_lower_rate(lq_sta, &rate, rate.index, - use_ht_possible); + rs_get_lower_rate(lq_sta, &rate, rate.index, use_ht_possible); /* How many times should we repeat the next rate? */ if (is_legacy(&rate)) { if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) ant_toggle_cnt++; else if (mvm && - rs_toggle_antenna(valid_tx_ant, - &new_rate, &rate)) + rs_toggle_antenna(valid_tx_ant, &rate)) ant_toggle_cnt = 1; repeat_rate = IWL_NUMBER_TRY; @@ -2468,15 +2448,36 @@ static void rs_fill_link_cmd(struct iwl_mvm *mvm, */ use_ht_possible = 0; - /* Override next rate if needed for debug purposes */ - rs_dbgfs_set_mcs(lq_sta, &new_rate); - /* Fill next table entry */ - lq_cmd->rs_table[index] = cpu_to_le32(new_rate); + lq_cmd->rs_table[index] = cpu_to_le32( + ucode_rate_from_rs_rate(mvm, &rate)); index++; repeat_rate--; } +} + +static void rs_fill_lq_cmd(struct iwl_mvm *mvm, + struct ieee80211_sta *sta, + struct iwl_lq_sta *lq_sta, + const struct rs_rate *initial_rate) +{ + struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; + u8 ant = initial_rate->ant; + +#ifdef CONFIG_MAC80211_DEBUGFS + if (lq_sta->dbg_fixed_rate) { + rs_build_rates_table_from_fixed(mvm, lq_cmd, + lq_sta->band, + lq_sta->dbg_fixed_rate); + ant = (lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) >> + RATE_MCS_ANT_POS; + } else +#endif + rs_build_rates_table(mvm, lq_sta, initial_rate); + + if (num_of_ant(ant) == 1) + lq_cmd->single_stream_ant_msk = ant; lq_cmd->agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; lq_cmd->agg_disable_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; @@ -2510,31 +2511,6 @@ static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, } #ifdef CONFIG_MAC80211_DEBUGFS -static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, - u32 *rate_n_flags) -{ - struct iwl_mvm *mvm; - u8 valid_tx_ant; - u8 ant_sel_tx; - - mvm = lq_sta->drv; - valid_tx_ant = iwl_fw_valid_tx_ant(mvm->fw); - if (lq_sta->dbg_fixed_rate) { - ant_sel_tx = - ((lq_sta->dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) - >> RATE_MCS_ANT_POS); - if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { - *rate_n_flags = lq_sta->dbg_fixed_rate; - } else { - lq_sta->dbg_fixed_rate = 0; - IWL_ERR(mvm, - "Invalid antenna selection 0x%X, Valid is 0x%X\n", - ant_sel_tx, valid_tx_ant); - IWL_DEBUG_RATE(mvm, "Fixed rate OFF\n"); - } - } -} - static int rs_pretty_print_rate(char *buf, const u32 rate) { @@ -2605,7 +2581,10 @@ static void rs_program_fix_rate(struct iwl_mvm *mvm, lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); if (lq_sta->dbg_fixed_rate) { - rs_fill_link_cmd(NULL, NULL, lq_sta, lq_sta->dbg_fixed_rate); + struct rs_rate rate; + rs_rate_from_ucode_rate(lq_sta->dbg_fixed_rate, + lq_sta->band, &rate); + rs_fill_lq_cmd(NULL, NULL, lq_sta, &rate); iwl_mvm_send_lq_cmd(lq_sta->drv, &lq_sta->lq, false); } } @@ -2739,14 +2718,14 @@ static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, rate = &tbl->rate; desc += sprintf(buff+desc, "%s type=%d SGI=%d BW=%s DUP=0\n" - "rate=0x%X\n", + "index=%d\n", lq_sta->active_tbl == i ? "*" : "x", rate->type, rate->sgi, is_ht20(rate) ? "20Mhz" : is_ht40(rate) ? "40Mhz" : is_ht80(rate) ? "80Mhz" : "ERR", - tbl->current_rate); + rate->index); for (j = 0; j < IWL_RATE_COUNT; j++) { desc += sprintf(buff+desc, "counter=%d success=%d %%=%d\n", diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.h b/drivers/net/wireless/iwlwifi/mvm/rs.h index b32960796384..7b26e6568a60 100644 --- a/drivers/net/wireless/iwlwifi/mvm/rs.h +++ b/drivers/net/wireless/iwlwifi/mvm/rs.h @@ -278,7 +278,6 @@ struct iwl_scale_tbl_info { struct rs_rate rate; enum rs_column column; 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 */ }; -- 2.30.2