diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/rs.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/rs.c | 3983 |
1 files changed, 0 insertions, 3983 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c deleted file mode 100644 index d1ad10391..000000000 --- a/drivers/net/wireless/iwlwifi/mvm/rs.c +++ /dev/null @@ -1,3983 +0,0 @@ -/****************************************************************************** - * - * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. - * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA - * - * The full GNU General Public License is included in this distribution in the - * file called LICENSE. - * - * Contact Information: - * Intel Linux Wireless <ilw@linux.intel.com> - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - *****************************************************************************/ -#include <linux/kernel.h> -#include <linux/skbuff.h> -#include <linux/slab.h> -#include <net/mac80211.h> - -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/delay.h> - -#include <linux/workqueue.h> -#include "rs.h" -#include "fw-api.h" -#include "sta.h" -#include "iwl-op-mode.h" -#include "mvm.h" -#include "debugfs.h" - -#define RS_NAME "iwl-mvm-rs" - -#define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ - -/* Calculations of success ratio are done in fixed point where 12800 is 100%. - * Use this macro when dealing with thresholds consts set as a percentage - */ -#define RS_PERCENT(x) (128 * x) - -static u8 rs_ht_to_legacy[] = { - [IWL_RATE_MCS_0_INDEX] = IWL_RATE_6M_INDEX, - [IWL_RATE_MCS_1_INDEX] = IWL_RATE_9M_INDEX, - [IWL_RATE_MCS_2_INDEX] = IWL_RATE_12M_INDEX, - [IWL_RATE_MCS_3_INDEX] = IWL_RATE_18M_INDEX, - [IWL_RATE_MCS_4_INDEX] = IWL_RATE_24M_INDEX, - [IWL_RATE_MCS_5_INDEX] = IWL_RATE_36M_INDEX, - [IWL_RATE_MCS_6_INDEX] = IWL_RATE_48M_INDEX, - [IWL_RATE_MCS_7_INDEX] = IWL_RATE_54M_INDEX, - [IWL_RATE_MCS_8_INDEX] = IWL_RATE_54M_INDEX, - [IWL_RATE_MCS_9_INDEX] = IWL_RATE_54M_INDEX, -}; - -static const u8 ant_toggle_lookup[] = { - [ANT_NONE] = ANT_NONE, - [ANT_A] = ANT_B, - [ANT_B] = ANT_C, - [ANT_AB] = ANT_BC, - [ANT_C] = ANT_A, - [ANT_AC] = ANT_AB, - [ANT_BC] = ANT_AC, - [ANT_ABC] = ANT_ABC, -}; - -#define IWL_DECLARE_RATE_INFO(r, s, rp, rn) \ - [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ - IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ - IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ - IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ - IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP,\ - IWL_RATE_##rp##M_INDEX, \ - IWL_RATE_##rn##M_INDEX } - -#define IWL_DECLARE_MCS_RATE(s) \ - [IWL_RATE_MCS_##s##_INDEX] = { IWL_RATE_INVM_PLCP, \ - IWL_RATE_HT_SISO_MCS_##s##_PLCP, \ - IWL_RATE_HT_MIMO2_MCS_##s##_PLCP, \ - IWL_RATE_VHT_SISO_MCS_##s##_PLCP, \ - IWL_RATE_VHT_MIMO2_MCS_##s##_PLCP, \ - IWL_RATE_INVM_INDEX, \ - IWL_RATE_INVM_INDEX } - -/* - * Parameter order: - * rate, ht rate, prev rate, next rate - * - * If there isn't a valid next or previous rate then INV is used which - * maps to IWL_RATE_INVALID - * - */ -static const struct iwl_rs_rate_info iwl_rates[IWL_RATE_COUNT] = { - IWL_DECLARE_RATE_INFO(1, INV, INV, 2), /* 1mbps */ - IWL_DECLARE_RATE_INFO(2, INV, 1, 5), /* 2mbps */ - IWL_DECLARE_RATE_INFO(5, INV, 2, 11), /*5.5mbps */ - IWL_DECLARE_RATE_INFO(11, INV, 9, 12), /* 11mbps */ - IWL_DECLARE_RATE_INFO(6, 0, 5, 11), /* 6mbps ; MCS 0 */ - IWL_DECLARE_RATE_INFO(9, INV, 6, 11), /* 9mbps */ - IWL_DECLARE_RATE_INFO(12, 1, 11, 18), /* 12mbps ; MCS 1 */ - IWL_DECLARE_RATE_INFO(18, 2, 12, 24), /* 18mbps ; MCS 2 */ - IWL_DECLARE_RATE_INFO(24, 3, 18, 36), /* 24mbps ; MCS 3 */ - IWL_DECLARE_RATE_INFO(36, 4, 24, 48), /* 36mbps ; MCS 4 */ - IWL_DECLARE_RATE_INFO(48, 5, 36, 54), /* 48mbps ; MCS 5 */ - IWL_DECLARE_RATE_INFO(54, 6, 48, INV), /* 54mbps ; MCS 6 */ - IWL_DECLARE_MCS_RATE(7), /* MCS 7 */ - IWL_DECLARE_MCS_RATE(8), /* MCS 8 */ - IWL_DECLARE_MCS_RATE(9), /* MCS 9 */ -}; - -enum rs_action { - RS_ACTION_STAY = 0, - RS_ACTION_DOWNSCALE = -1, - RS_ACTION_UPSCALE = 1, -}; - -enum rs_column_mode { - RS_INVALID = 0, - RS_LEGACY, - RS_SISO, - RS_MIMO2, -}; - -#define MAX_NEXT_COLUMNS 7 -#define MAX_COLUMN_CHECKS 3 - -struct rs_tx_column; - -typedef bool (*allow_column_func_t) (struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct rs_rate *rate, - const struct rs_tx_column *next_col); - -struct rs_tx_column { - enum rs_column_mode mode; - u8 ant; - bool sgi; - enum rs_column next_columns[MAX_NEXT_COLUMNS]; - allow_column_func_t checks[MAX_COLUMN_CHECKS]; -}; - -static bool rs_ant_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, - struct rs_rate *rate, - const struct rs_tx_column *next_col) -{ - return iwl_mvm_bt_coex_is_ant_avail(mvm, next_col->ant); -} - -static bool rs_mimo_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, - struct rs_rate *rate, - const struct rs_tx_column *next_col) -{ - struct iwl_mvm_sta *mvmsta; - struct iwl_mvm_vif *mvmvif; - - if (!sta->ht_cap.ht_supported) - return false; - - if (sta->smps_mode == IEEE80211_SMPS_STATIC) - return false; - - if (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) < 2) - return false; - - if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) - return false; - - mvmsta = iwl_mvm_sta_from_mac80211(sta); - mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); - - if (mvm->nvm_data->sku_cap_mimo_disabled) - return false; - - return true; -} - -static bool rs_siso_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, - struct rs_rate *rate, - const struct rs_tx_column *next_col) -{ - if (!sta->ht_cap.ht_supported) - return false; - - return true; -} - -static bool rs_sgi_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, - struct rs_rate *rate, - const struct rs_tx_column *next_col) -{ - struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; - struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; - - if (is_ht20(rate) && (ht_cap->cap & - IEEE80211_HT_CAP_SGI_20)) - return true; - if (is_ht40(rate) && (ht_cap->cap & - IEEE80211_HT_CAP_SGI_40)) - return true; - if (is_ht80(rate) && (vht_cap->cap & - IEEE80211_VHT_CAP_SHORT_GI_80)) - return true; - - return false; -} - -static const struct rs_tx_column rs_tx_columns[] = { - [RS_COLUMN_LEGACY_ANT_A] = { - .mode = RS_LEGACY, - .ant = ANT_A, - .next_columns = { - RS_COLUMN_LEGACY_ANT_B, - RS_COLUMN_SISO_ANT_A, - RS_COLUMN_MIMO2, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - }, - .checks = { - rs_ant_allow, - }, - }, - [RS_COLUMN_LEGACY_ANT_B] = { - .mode = RS_LEGACY, - .ant = ANT_B, - .next_columns = { - RS_COLUMN_LEGACY_ANT_A, - RS_COLUMN_SISO_ANT_B, - RS_COLUMN_MIMO2, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - }, - .checks = { - rs_ant_allow, - }, - }, - [RS_COLUMN_SISO_ANT_A] = { - .mode = RS_SISO, - .ant = ANT_A, - .next_columns = { - RS_COLUMN_SISO_ANT_B, - RS_COLUMN_MIMO2, - RS_COLUMN_SISO_ANT_A_SGI, - RS_COLUMN_LEGACY_ANT_A, - RS_COLUMN_LEGACY_ANT_B, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - }, - .checks = { - rs_siso_allow, - rs_ant_allow, - }, - }, - [RS_COLUMN_SISO_ANT_B] = { - .mode = RS_SISO, - .ant = ANT_B, - .next_columns = { - RS_COLUMN_SISO_ANT_A, - RS_COLUMN_MIMO2, - RS_COLUMN_SISO_ANT_B_SGI, - RS_COLUMN_LEGACY_ANT_A, - RS_COLUMN_LEGACY_ANT_B, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - }, - .checks = { - rs_siso_allow, - rs_ant_allow, - }, - }, - [RS_COLUMN_SISO_ANT_A_SGI] = { - .mode = RS_SISO, - .ant = ANT_A, - .sgi = true, - .next_columns = { - RS_COLUMN_SISO_ANT_B_SGI, - RS_COLUMN_MIMO2_SGI, - RS_COLUMN_SISO_ANT_A, - RS_COLUMN_LEGACY_ANT_A, - RS_COLUMN_LEGACY_ANT_B, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - }, - .checks = { - rs_siso_allow, - rs_ant_allow, - rs_sgi_allow, - }, - }, - [RS_COLUMN_SISO_ANT_B_SGI] = { - .mode = RS_SISO, - .ant = ANT_B, - .sgi = true, - .next_columns = { - RS_COLUMN_SISO_ANT_A_SGI, - RS_COLUMN_MIMO2_SGI, - RS_COLUMN_SISO_ANT_B, - RS_COLUMN_LEGACY_ANT_A, - RS_COLUMN_LEGACY_ANT_B, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - }, - .checks = { - rs_siso_allow, - rs_ant_allow, - rs_sgi_allow, - }, - }, - [RS_COLUMN_MIMO2] = { - .mode = RS_MIMO2, - .ant = ANT_AB, - .next_columns = { - RS_COLUMN_SISO_ANT_A, - RS_COLUMN_MIMO2_SGI, - RS_COLUMN_LEGACY_ANT_A, - RS_COLUMN_LEGACY_ANT_B, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - }, - .checks = { - rs_mimo_allow, - }, - }, - [RS_COLUMN_MIMO2_SGI] = { - .mode = RS_MIMO2, - .ant = ANT_AB, - .sgi = true, - .next_columns = { - RS_COLUMN_SISO_ANT_A_SGI, - RS_COLUMN_MIMO2, - RS_COLUMN_LEGACY_ANT_A, - RS_COLUMN_LEGACY_ANT_B, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - RS_COLUMN_INVALID, - }, - .checks = { - rs_mimo_allow, - rs_sgi_allow, - }, - }, -}; - -static inline u8 rs_extract_rate(u32 rate_n_flags) -{ - /* also works for HT because bits 7:6 are zero there */ - return (u8)(rate_n_flags & RATE_LEGACY_RATE_MSK); -} - -static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) -{ - int idx = 0; - - if (rate_n_flags & RATE_MCS_HT_MSK) { - idx = rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK; - idx += IWL_RATE_MCS_0_INDEX; - - /* skip 9M not supported in HT*/ - if (idx >= IWL_RATE_9M_INDEX) - idx += 1; - if ((idx >= IWL_FIRST_HT_RATE) && (idx <= IWL_LAST_HT_RATE)) - return idx; - } else if (rate_n_flags & RATE_MCS_VHT_MSK) { - idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK; - idx += IWL_RATE_MCS_0_INDEX; - - /* skip 9M not supported in VHT*/ - if (idx >= IWL_RATE_9M_INDEX) - idx++; - if ((idx >= IWL_FIRST_VHT_RATE) && (idx <= IWL_LAST_VHT_RATE)) - return idx; - } else { - /* legacy rate format, search for match in table */ - - u8 legacy_rate = rs_extract_rate(rate_n_flags); - for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++) - if (iwl_rates[idx].plcp == legacy_rate) - return idx; - } - - return IWL_RATE_INVALID; -} - -static void rs_rate_scale_perform(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, - int tid); -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); - -/** - * The following tables contain the expected throughput metrics for all rates - * - * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits - * - * where invalid entries are zeros. - * - * CCK rates are only valid in legacy table and will only be used in G - * (2.4 GHz) band. - */ - -static const u16 expected_tpt_legacy[IWL_RATE_COUNT] = { - 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0, 0, 0 -}; - -/* Expected TpT tables. 4 indexes: - * 0 - NGI, 1 - SGI, 2 - AGG+NGI, 3 - AGG+SGI - */ -static const u16 expected_tpt_siso_20MHz[4][IWL_RATE_COUNT] = { - {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202, 216, 0}, - {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210, 225, 0}, - {0, 0, 0, 0, 49, 0, 97, 145, 192, 285, 375, 420, 464, 551, 0}, - {0, 0, 0, 0, 54, 0, 108, 160, 213, 315, 415, 465, 513, 608, 0}, -}; - -static const u16 expected_tpt_siso_40MHz[4][IWL_RATE_COUNT] = { - {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257, 269, 275}, - {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264, 275, 280}, - {0, 0, 0, 0, 101, 0, 199, 295, 389, 570, 744, 828, 911, 1070, 1173}, - {0, 0, 0, 0, 112, 0, 220, 326, 429, 629, 819, 912, 1000, 1173, 1284}, -}; - -static const u16 expected_tpt_siso_80MHz[4][IWL_RATE_COUNT] = { - {0, 0, 0, 0, 130, 0, 191, 223, 244, 273, 288, 294, 298, 305, 308}, - {0, 0, 0, 0, 138, 0, 200, 231, 251, 279, 293, 298, 302, 308, 312}, - {0, 0, 0, 0, 217, 0, 429, 634, 834, 1220, 1585, 1760, 1931, 2258, 2466}, - {0, 0, 0, 0, 241, 0, 475, 701, 921, 1343, 1741, 1931, 2117, 2468, 2691}, -}; - -static const u16 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { - {0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250, 261, 0}, - {0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256, 267, 0}, - {0, 0, 0, 0, 98, 0, 193, 286, 375, 550, 718, 799, 878, 1032, 0}, - {0, 0, 0, 0, 109, 0, 214, 316, 414, 607, 790, 879, 965, 1132, 0}, -}; - -static const u16 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { - {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289, 296, 300}, - {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293, 300, 303}, - {0, 0, 0, 0, 200, 0, 390, 571, 741, 1067, 1365, 1505, 1640, 1894, 2053}, - {0, 0, 0, 0, 221, 0, 430, 630, 816, 1169, 1490, 1641, 1784, 2053, 2221}, -}; - -static const u16 expected_tpt_mimo2_80MHz[4][IWL_RATE_COUNT] = { - {0, 0, 0, 0, 182, 0, 240, 264, 278, 299, 308, 311, 313, 317, 319}, - {0, 0, 0, 0, 190, 0, 247, 269, 282, 302, 310, 313, 315, 319, 320}, - {0, 0, 0, 0, 428, 0, 833, 1215, 1577, 2254, 2863, 3147, 3418, 3913, 4219}, - {0, 0, 0, 0, 474, 0, 920, 1338, 1732, 2464, 3116, 3418, 3705, 4225, 4545}, -}; - -/* mbps, mcs */ -static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { - { "1", "BPSK DSSS"}, - { "2", "QPSK DSSS"}, - {"5.5", "BPSK CCK"}, - { "11", "QPSK CCK"}, - { "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 const char *rs_pretty_ant(u8 ant) -{ - static const char * const ant_name[] = { - [ANT_NONE] = "None", - [ANT_A] = "A", - [ANT_B] = "B", - [ANT_AB] = "AB", - [ANT_C] = "C", - [ANT_AC] = "AC", - [ANT_BC] = "BC", - [ANT_ABC] = "ABC", - }; - - if (ant > ANT_ABC) - return "UNKNOWN"; - - return ant_name[ant]; -} - -static const char *rs_pretty_lq_type(enum iwl_table_type type) -{ - static const char * const lq_types[] = { - [LQ_NONE] = "NONE", - [LQ_LEGACY_A] = "LEGACY_A", - [LQ_LEGACY_G] = "LEGACY_G", - [LQ_HT_SISO] = "HT SISO", - [LQ_HT_MIMO2] = "HT MIMO", - [LQ_VHT_SISO] = "VHT SISO", - [LQ_VHT_MIMO2] = "VHT MIMO", - }; - - if (type < LQ_NONE || type >= LQ_MAX) - return "UNKNOWN"; - - return lq_types[type]; -} - -static char *rs_pretty_rate(const struct rs_rate *rate) -{ - static char buf[40]; - static const char * const legacy_rates[] = { - [IWL_RATE_1M_INDEX] = "1M", - [IWL_RATE_2M_INDEX] = "2M", - [IWL_RATE_5M_INDEX] = "5.5M", - [IWL_RATE_11M_INDEX] = "11M", - [IWL_RATE_6M_INDEX] = "6M", - [IWL_RATE_9M_INDEX] = "9M", - [IWL_RATE_12M_INDEX] = "12M", - [IWL_RATE_18M_INDEX] = "18M", - [IWL_RATE_24M_INDEX] = "24M", - [IWL_RATE_36M_INDEX] = "36M", - [IWL_RATE_48M_INDEX] = "48M", - [IWL_RATE_54M_INDEX] = "54M", - }; - static const char *const ht_vht_rates[] = { - [IWL_RATE_MCS_0_INDEX] = "MCS0", - [IWL_RATE_MCS_1_INDEX] = "MCS1", - [IWL_RATE_MCS_2_INDEX] = "MCS2", - [IWL_RATE_MCS_3_INDEX] = "MCS3", - [IWL_RATE_MCS_4_INDEX] = "MCS4", - [IWL_RATE_MCS_5_INDEX] = "MCS5", - [IWL_RATE_MCS_6_INDEX] = "MCS6", - [IWL_RATE_MCS_7_INDEX] = "MCS7", - [IWL_RATE_MCS_8_INDEX] = "MCS8", - [IWL_RATE_MCS_9_INDEX] = "MCS9", - }; - const char *rate_str; - - if (is_type_legacy(rate->type)) - rate_str = legacy_rates[rate->index]; - else if (is_type_ht(rate->type) || is_type_vht(rate->type)) - rate_str = ht_vht_rates[rate->index]; - else - rate_str = "BAD_RATE"; - - sprintf(buf, "(%s|%s|%s)", rs_pretty_lq_type(rate->type), - rs_pretty_ant(rate->ant), rate_str); - return buf; -} - -static inline void rs_dump_rate(struct iwl_mvm *mvm, const struct rs_rate *rate, - const char *prefix) -{ - IWL_DEBUG_RATE(mvm, - "%s: %s BW: %d SGI: %d LDPC: %d STBC: %d\n", - prefix, rs_pretty_rate(rate), rate->bw, - rate->sgi, rate->ldpc, rate->stbc); -} - -static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) -{ - window->data = 0; - window->success_counter = 0; - window->success_ratio = IWL_INVALID_VALUE; - window->counter = 0; - window->average_tpt = IWL_INVALID_VALUE; -} - -static void rs_rate_scale_clear_tbl_windows(struct iwl_mvm *mvm, - struct iwl_scale_tbl_info *tbl) -{ - int i; - - IWL_DEBUG_RATE(mvm, "Clearing up window stats\n"); - for (i = 0; i < IWL_RATE_COUNT; i++) - rs_rate_scale_clear_window(&tbl->win[i]); - - for (i = 0; i < ARRAY_SIZE(tbl->tpc_win); i++) - rs_rate_scale_clear_window(&tbl->tpc_win[i]); -} - -static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) -{ - return (ant_type & valid_antenna) == ant_type; -} - -static int rs_tl_turn_on_agg_for_tid(struct iwl_mvm *mvm, - struct iwl_lq_sta *lq_data, u8 tid, - struct ieee80211_sta *sta) -{ - int ret = -EAGAIN; - - IWL_DEBUG_HT(mvm, "Starting Tx agg: STA: %pM tid: %d\n", - sta->addr, tid); - ret = ieee80211_start_tx_ba_session(sta, tid, 5000); - if (ret == -EAGAIN) { - /* - * driver and mac80211 is out of sync - * this might be cause by reloading firmware - * stop the tx ba session here - */ - IWL_ERR(mvm, "Fail start Tx agg on tid: %d\n", - tid); - ieee80211_stop_tx_ba_session(sta, tid); - } - return ret; -} - -static void rs_tl_turn_on_agg(struct iwl_mvm *mvm, u8 tid, - struct iwl_lq_sta *lq_data, - struct ieee80211_sta *sta) -{ - if (tid < IWL_MAX_TID_COUNT) - rs_tl_turn_on_agg_for_tid(mvm, lq_data, tid, sta); - else - IWL_ERR(mvm, "tid exceeds max TID count: %d/%d\n", - tid, IWL_MAX_TID_COUNT); -} - -static inline int get_num_of_ant_from_rate(u32 rate_n_flags) -{ - return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + - !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + - !!(rate_n_flags & RATE_MCS_ANT_C_MSK); -} - -/* - * Static function to get the expected throughput from an iwl_scale_tbl_info - * that wraps a NULL pointer check - */ -static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) -{ - if (tbl->expected_tpt) - return tbl->expected_tpt[rs_index]; - return 0; -} - -/** - * rs_collect_tx_data - Update the success/failure sliding window - * - * We keep a sliding window of the last 62 packets transmitted - * at this rate. window->data contains the bitmask of successful - * packets. - */ -static int _rs_collect_tx_data(struct iwl_mvm *mvm, - struct iwl_scale_tbl_info *tbl, - int scale_index, int attempts, int successes, - struct iwl_rate_scale_data *window) -{ - static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); - s32 fail_count, tpt; - - /* Get expected throughput */ - tpt = get_expected_tpt(tbl, scale_index); - - /* - * Keep track of only the latest 62 tx frame attempts in this rate's - * history window; anything older isn't really relevant any more. - * If we have filled up the sliding window, drop the oldest attempt; - * if the oldest attempt (highest bit in bitmap) shows "success", - * subtract "1" from the success counter (this is the main reason - * we keep these bitmaps!). - */ - while (attempts > 0) { - if (window->counter >= IWL_RATE_MAX_WINDOW) { - /* remove earliest */ - window->counter = IWL_RATE_MAX_WINDOW - 1; - - if (window->data & mask) { - window->data &= ~mask; - window->success_counter--; - } - } - - /* Increment frames-attempted counter */ - window->counter++; - - /* Shift bitmap by one frame to throw away oldest history */ - window->data <<= 1; - - /* Mark the most recent #successes attempts as successful */ - if (successes > 0) { - window->success_counter++; - window->data |= 0x1; - successes--; - } - - attempts--; - } - - /* Calculate current success ratio, avoid divide-by-0! */ - if (window->counter > 0) - window->success_ratio = 128 * (100 * window->success_counter) - / window->counter; - else - window->success_ratio = IWL_INVALID_VALUE; - - fail_count = window->counter - window->success_counter; - - /* Calculate average throughput, if we have enough history. */ - if ((fail_count >= IWL_MVM_RS_RATE_MIN_FAILURE_TH) || - (window->success_counter >= IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) - window->average_tpt = (window->success_ratio * tpt + 64) / 128; - else - window->average_tpt = IWL_INVALID_VALUE; - - return 0; -} - -static int rs_collect_tx_data(struct iwl_mvm *mvm, - struct iwl_lq_sta *lq_sta, - struct iwl_scale_tbl_info *tbl, - int scale_index, int attempts, int successes, - u8 reduced_txp) -{ - struct iwl_rate_scale_data *window = NULL; - int ret; - - if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) - return -EINVAL; - - if (tbl->column != RS_COLUMN_INVALID) { - struct lq_sta_pers *pers = &lq_sta->pers; - - pers->tx_stats[tbl->column][scale_index].total += attempts; - pers->tx_stats[tbl->column][scale_index].success += successes; - } - - /* Select window for current tx bit rate */ - window = &(tbl->win[scale_index]); - - ret = _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes, - window); - if (ret) - return ret; - - if (WARN_ON_ONCE(reduced_txp > TPC_MAX_REDUCTION)) - return -EINVAL; - - window = &tbl->tpc_win[reduced_txp]; - return _rs_collect_tx_data(mvm, tbl, scale_index, attempts, successes, - window); -} - -/* Convert rs_rate object into ucode rate bitmask */ -static u32 ucode_rate_from_rs_rate(struct iwl_mvm *mvm, - struct rs_rate *rate) -{ - u32 ucode_rate = 0; - int index = rate->index; - - ucode_rate |= ((rate->ant << RATE_MCS_ANT_POS) & - RATE_MCS_ANT_ABC_MSK); - - if (is_legacy(rate)) { - ucode_rate |= iwl_rates[index].plcp; - if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) - ucode_rate |= RATE_MCS_CCK_MSK; - return ucode_rate; - } - - if (is_ht(rate)) { - if (index < IWL_FIRST_HT_RATE || index > IWL_LAST_HT_RATE) { - IWL_ERR(mvm, "Invalid HT rate index %d\n", index); - index = IWL_LAST_HT_RATE; - } - ucode_rate |= RATE_MCS_HT_MSK; - - if (is_ht_siso(rate)) - ucode_rate |= iwl_rates[index].plcp_ht_siso; - else if (is_ht_mimo2(rate)) - ucode_rate |= iwl_rates[index].plcp_ht_mimo2; - else - WARN_ON_ONCE(1); - } else if (is_vht(rate)) { - if (index < IWL_FIRST_VHT_RATE || index > IWL_LAST_VHT_RATE) { - IWL_ERR(mvm, "Invalid VHT rate index %d\n", index); - index = IWL_LAST_VHT_RATE; - } - ucode_rate |= RATE_MCS_VHT_MSK; - if (is_vht_siso(rate)) - ucode_rate |= iwl_rates[index].plcp_vht_siso; - else if (is_vht_mimo2(rate)) - ucode_rate |= iwl_rates[index].plcp_vht_mimo2; - else - WARN_ON_ONCE(1); - - } else { - IWL_ERR(mvm, "Invalid rate->type %d\n", rate->type); - } - - if (is_siso(rate) && rate->stbc) { - /* To enable STBC we need to set both a flag and ANT_AB */ - ucode_rate |= RATE_MCS_ANT_AB_MSK; - ucode_rate |= RATE_MCS_VHT_STBC_MSK; - } - - 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; -} - -/* Convert a ucode rate into an rs_rate object */ -static int rs_rate_from_ucode_rate(const u32 ucode_rate, - enum ieee80211_band band, - struct rs_rate *rate) -{ - u32 ant_msk = ucode_rate & RATE_MCS_ANT_ABC_MSK; - u8 num_of_ant = get_num_of_ant_from_rate(ucode_rate); - u8 nss; - - memset(rate, 0, sizeof(*rate)); - rate->index = iwl_hwrate_to_plcp_idx(ucode_rate); - - if (rate->index == IWL_RATE_INVALID) - return -EINVAL; - - rate->ant = (ant_msk >> RATE_MCS_ANT_POS); - - /* Legacy */ - if (!(ucode_rate & RATE_MCS_HT_MSK) && - !(ucode_rate & RATE_MCS_VHT_MSK)) { - if (num_of_ant == 1) { - if (band == IEEE80211_BAND_5GHZ) - rate->type = LQ_LEGACY_A; - else - rate->type = LQ_LEGACY_G; - } - - return 0; - } - - /* HT or VHT */ - if (ucode_rate & RATE_MCS_SGI_MSK) - rate->sgi = true; - if (ucode_rate & RATE_MCS_LDPC_MSK) - rate->ldpc = true; - if (ucode_rate & RATE_MCS_VHT_STBC_MSK) - rate->stbc = true; - if (ucode_rate & RATE_MCS_BF_MSK) - rate->bfer = true; - - rate->bw = ucode_rate & RATE_MCS_CHAN_WIDTH_MSK; - - if (ucode_rate & RATE_MCS_HT_MSK) { - nss = ((ucode_rate & RATE_HT_MCS_NSS_MSK) >> - RATE_HT_MCS_NSS_POS) + 1; - - if (nss == 1) { - rate->type = LQ_HT_SISO; - WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1, - "stbc %d bfer %d", - rate->stbc, rate->bfer); - } else if (nss == 2) { - rate->type = LQ_HT_MIMO2; - WARN_ON_ONCE(num_of_ant != 2); - } else { - WARN_ON_ONCE(1); - } - } else if (ucode_rate & RATE_MCS_VHT_MSK) { - nss = ((ucode_rate & RATE_VHT_MCS_NSS_MSK) >> - RATE_VHT_MCS_NSS_POS) + 1; - - if (nss == 1) { - rate->type = LQ_VHT_SISO; - WARN_ONCE(!rate->stbc && !rate->bfer && num_of_ant != 1, - "stbc %d bfer %d", - rate->stbc, rate->bfer); - } else if (nss == 2) { - rate->type = LQ_VHT_MIMO2; - WARN_ON_ONCE(num_of_ant != 2); - } else { - WARN_ON_ONCE(1); - } - } - - WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_160); - WARN_ON_ONCE(rate->bw == RATE_MCS_CHAN_WIDTH_80 && - !is_vht(rate)); - - return 0; -} - -/* switch to another antenna/antennas and return 1 */ -/* if no other valid antenna found, return 0 */ -static int rs_toggle_antenna(u32 valid_ant, struct rs_rate *rate) -{ - u8 new_ant_type; - - if (!rate->ant || rate->ant > ANT_ABC) - return 0; - - if (!rs_is_valid_ant(valid_ant, rate->ant)) - return 0; - - new_ant_type = ant_toggle_lookup[rate->ant]; - - while ((new_ant_type != rate->ant) && - !rs_is_valid_ant(valid_ant, new_ant_type)) - new_ant_type = ant_toggle_lookup[new_ant_type]; - - if (new_ant_type == rate->ant) - return 0; - - rate->ant = new_ant_type; - - return 1; -} - -static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, - struct rs_rate *rate) -{ - if (is_legacy(rate)) - return lq_sta->active_legacy_rate; - else if (is_siso(rate)) - return lq_sta->active_siso_rate; - else if (is_mimo2(rate)) - return lq_sta->active_mimo2_rate; - - WARN_ON_ONCE(1); - return 0; -} - -static u16 rs_get_adjacent_rate(struct iwl_mvm *mvm, u8 index, u16 rate_mask, - int rate_type) -{ - u8 high = IWL_RATE_INVALID; - u8 low = IWL_RATE_INVALID; - - /* 802.11A or ht walks to the next literal adjacent rate in - * the rate table */ - if (is_type_a_band(rate_type) || !is_type_legacy(rate_type)) { - int i; - u32 mask; - - /* Find the previous rate that is in the rate mask */ - i = index - 1; - for (mask = (1 << i); i >= 0; i--, mask >>= 1) { - if (rate_mask & mask) { - low = i; - break; - } - } - - /* Find the next rate that is in the rate mask */ - i = index + 1; - for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { - if (rate_mask & mask) { - high = i; - break; - } - } - - return (high << 8) | low; - } - - low = index; - while (low != IWL_RATE_INVALID) { - low = iwl_rates[low].prev_rs; - if (low == IWL_RATE_INVALID) - break; - if (rate_mask & (1 << low)) - break; - } - - high = index; - while (high != IWL_RATE_INVALID) { - high = iwl_rates[high].next_rs; - if (high == IWL_RATE_INVALID) - break; - if (rate_mask & (1 << high)) - break; - } - - return (high << 8) | low; -} - -static inline bool rs_rate_supported(struct iwl_lq_sta *lq_sta, - struct rs_rate *rate) -{ - return BIT(rate->index) & rs_get_supported_rates(lq_sta, rate); -} - -/* Get the next supported lower rate in the current column. - * Return true if bottom rate in the current column was reached - */ -static bool rs_get_lower_rate_in_column(struct iwl_lq_sta *lq_sta, - struct rs_rate *rate) -{ - u8 low; - u16 high_low; - u16 rate_mask; - struct iwl_mvm *mvm = lq_sta->pers.drv; - - rate_mask = rs_get_supported_rates(lq_sta, rate); - high_low = rs_get_adjacent_rate(mvm, rate->index, rate_mask, - rate->type); - low = high_low & 0xff; - - /* Bottom rate of column reached */ - if (low == IWL_RATE_INVALID) - return true; - - rate->index = low; - return false; -} - -/* Get the next rate to use following a column downgrade */ -static void rs_get_lower_rate_down_column(struct iwl_lq_sta *lq_sta, - struct rs_rate *rate) -{ - struct iwl_mvm *mvm = lq_sta->pers.drv; - - if (is_legacy(rate)) { - /* No column to downgrade from Legacy */ - return; - } else if (is_siso(rate)) { - /* Downgrade to Legacy if we were in SISO */ - if (lq_sta->band == IEEE80211_BAND_5GHZ) - rate->type = LQ_LEGACY_A; - else - rate->type = LQ_LEGACY_G; - - rate->bw = RATE_MCS_CHAN_WIDTH_20; - - WARN_ON_ONCE(rate->index < IWL_RATE_MCS_0_INDEX || - 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(iwl_mvm_get_valid_tx_ant(mvm)); - - /* Relevant in both switching to SISO or Legacy */ - rate->sgi = false; - - if (!rs_rate_supported(lq_sta, rate)) - rs_get_lower_rate_in_column(lq_sta, rate); -} - -/* Check if both rates are identical - * allow_ant_mismatch enables matching a SISO rate on ANT_A or ANT_B - * with a rate indicating STBC/BFER and ANT_AB. - */ -static inline bool rs_rate_equal(struct rs_rate *a, - struct rs_rate *b, - bool allow_ant_mismatch) - -{ - bool ant_match = (a->ant == b->ant) && (a->stbc == b->stbc) && - (a->bfer == b->bfer); - - if (allow_ant_mismatch) { - if (a->stbc || a->bfer) { - WARN_ONCE(a->ant != ANT_AB, "stbc %d bfer %d ant %d", - a->stbc, a->bfer, a->ant); - ant_match |= (b->ant == ANT_A || b->ant == ANT_B); - } else if (b->stbc || b->bfer) { - WARN_ONCE(b->ant != ANT_AB, "stbc %d bfer %d ant %d", - b->stbc, b->bfer, b->ant); - ant_match |= (a->ant == ANT_A || a->ant == ANT_B); - } - } - - return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi) && - (a->ldpc == b->ldpc) && (a->index == b->index) && ant_match; -} - -/* Check if both rates share the same column */ -static inline bool rs_rate_column_match(struct rs_rate *a, - struct rs_rate *b) -{ - bool ant_match; - - if (a->stbc || a->bfer) - ant_match = (b->ant == ANT_A || b->ant == ANT_B); - else - ant_match = (a->ant == b->ant); - - return (a->type == b->type) && (a->bw == b->bw) && (a->sgi == b->sgi) - && ant_match; -} - -static inline enum rs_column rs_get_column_from_rate(struct rs_rate *rate) -{ - if (is_legacy(rate)) { - if (rate->ant == ANT_A) - return RS_COLUMN_LEGACY_ANT_A; - - if (rate->ant == ANT_B) - return RS_COLUMN_LEGACY_ANT_B; - - goto err; - } - - if (is_siso(rate)) { - if (rate->ant == ANT_A || rate->stbc || rate->bfer) - return rate->sgi ? RS_COLUMN_SISO_ANT_A_SGI : - RS_COLUMN_SISO_ANT_A; - - if (rate->ant == ANT_B) - return rate->sgi ? RS_COLUMN_SISO_ANT_B_SGI : - RS_COLUMN_SISO_ANT_B; - - goto err; - } - - if (is_mimo(rate)) - return rate->sgi ? RS_COLUMN_MIMO2_SGI : RS_COLUMN_MIMO2; - -err: - return RS_COLUMN_INVALID; -} - -static u8 rs_get_tid(struct ieee80211_hdr *hdr) -{ - u8 tid = IWL_MAX_TID_COUNT; - - if (ieee80211_is_data_qos(hdr->frame_control)) { - u8 *qc = ieee80211_get_qos_ctl(hdr); - tid = qc[0] & 0xf; - } - - if (unlikely(tid > IWL_MAX_TID_COUNT)) - tid = IWL_MAX_TID_COUNT; - - return tid; -} - -void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta, - int tid, struct ieee80211_tx_info *info) -{ - int legacy_success; - int retries; - int i; - struct iwl_lq_cmd *table; - u32 lq_hwrate; - struct rs_rate lq_rate, tx_resp_rate; - struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; - u8 reduced_txp = (uintptr_t)info->status.status_driver_data[0]; - u32 tx_resp_hwrate = (uintptr_t)info->status.status_driver_data[1]; - struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); - struct iwl_lq_sta *lq_sta = &mvmsta->lq_sta; - bool allow_ant_mismatch = fw_has_api(&mvm->fw->ucode_capa, - IWL_UCODE_TLV_API_LQ_SS_PARAMS); - - /* Treat uninitialized rate scaling data same as non-existing. */ - if (!lq_sta) { - IWL_DEBUG_RATE(mvm, "Station rate scaling not created yet.\n"); - return; - } else if (!lq_sta->pers.drv) { - IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); - return; - } - - /* This packet was aggregated but doesn't carry status info */ - if ((info->flags & IEEE80211_TX_CTL_AMPDU) && - !(info->flags & IEEE80211_TX_STAT_AMPDU)) - return; - - rs_rate_from_ucode_rate(tx_resp_hwrate, info->band, &tx_resp_rate); - -#ifdef CONFIG_MAC80211_DEBUGFS - /* Disable last tx check if we are debugging with fixed rate but - * update tx stats */ - if (lq_sta->pers.dbg_fixed_rate) { - int index = tx_resp_rate.index; - enum rs_column column; - int attempts, success; - - column = rs_get_column_from_rate(&tx_resp_rate); - if (WARN_ONCE(column == RS_COLUMN_INVALID, - "Can't map rate 0x%x to column", - tx_resp_hwrate)) - return; - - if (info->flags & IEEE80211_TX_STAT_AMPDU) { - attempts = info->status.ampdu_len; - success = info->status.ampdu_ack_len; - } else { - attempts = info->status.rates[0].count; - success = !!(info->flags & IEEE80211_TX_STAT_ACK); - } - - lq_sta->pers.tx_stats[column][index].total += attempts; - lq_sta->pers.tx_stats[column][index].success += success; - - IWL_DEBUG_RATE(mvm, "Fixed rate 0x%x success %d attempts %d\n", - tx_resp_hwrate, success, attempts); - return; - } -#endif - - if (time_after(jiffies, - (unsigned long)(lq_sta->last_tx + - (IWL_MVM_RS_IDLE_TIMEOUT * HZ)))) { - int t; - - IWL_DEBUG_RATE(mvm, "Tx idle for too long. reinit rs\n"); - for (t = 0; t < IWL_MAX_TID_COUNT; t++) - ieee80211_stop_tx_ba_session(sta, t); - - iwl_mvm_rs_rate_init(mvm, sta, info->band, false); - return; - } - lq_sta->last_tx = jiffies; - - /* Ignore this Tx frame response if its initial rate doesn't match - * that of latest Link Quality command. There may be stragglers - * from a previous Link Quality command, but we're no longer interested - * in those; they're either from the "active" mode while we're trying - * to check "search" mode, or a prior "search" mode after we've moved - * to a new "search" mode (which might become the new "active" mode). - */ - table = &lq_sta->lq; - lq_hwrate = le32_to_cpu(table->rs_table[0]); - rs_rate_from_ucode_rate(lq_hwrate, info->band, &lq_rate); - - /* Here we actually compare this rate to the latest LQ command */ - if (!rs_rate_equal(&tx_resp_rate, &lq_rate, allow_ant_mismatch)) { - IWL_DEBUG_RATE(mvm, - "initial tx resp rate 0x%x does not match 0x%x\n", - tx_resp_hwrate, lq_hwrate); - - /* - * Since rates mis-match, the last LQ command may have failed. - * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with - * ... driver. - */ - lq_sta->missed_rate_counter++; - if (lq_sta->missed_rate_counter > IWL_MVM_RS_MISSED_RATE_MAX) { - lq_sta->missed_rate_counter = 0; - IWL_DEBUG_RATE(mvm, - "Too many rates mismatch. Send sync LQ. rs_state %d\n", - lq_sta->rs_state); - iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); - } - /* Regardless, ignore this status info for outdated rate */ - return; - } else - /* Rate did match, so reset the missed_rate_counter */ - lq_sta->missed_rate_counter = 0; - - if (!lq_sta->search_better_tbl) { - curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); - other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); - } else { - curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); - other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); - } - - if (WARN_ON_ONCE(!rs_rate_column_match(&lq_rate, &curr_tbl->rate))) { - IWL_DEBUG_RATE(mvm, - "Neither active nor search matches tx rate\n"); - tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); - rs_dump_rate(mvm, &tmp_tbl->rate, "ACTIVE"); - tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); - rs_dump_rate(mvm, &tmp_tbl->rate, "SEARCH"); - rs_dump_rate(mvm, &lq_rate, "ACTUAL"); - - /* - * no matching table found, let's by-pass the data collection - * and continue to perform rate scale to find the rate table - */ - rs_stay_in_table(lq_sta, true); - goto done; - } - - /* - * Updating the frame history depends on whether packets were - * aggregated. - * - * For aggregation, all packets were transmitted at the same rate, the - * first index into rate scale table. - */ - if (info->flags & IEEE80211_TX_STAT_AMPDU) { - /* ampdu_ack_len = 0 marks no BA was received. In this case - * treat it as a single frame loss as we don't want the success - * ratio to dip too quickly because a BA wasn't received - */ - if (info->status.ampdu_ack_len == 0) - info->status.ampdu_len = 1; - - rs_collect_tx_data(mvm, lq_sta, curr_tbl, lq_rate.index, - info->status.ampdu_len, - info->status.ampdu_ack_len, - reduced_txp); - - /* Update success/fail counts if not searching for new mode */ - if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { - lq_sta->total_success += info->status.ampdu_ack_len; - lq_sta->total_failed += (info->status.ampdu_len - - info->status.ampdu_ack_len); - } - } else { - /* For legacy, update frame history with for each Tx retry. */ - retries = info->status.rates[0].count - 1; - /* HW doesn't send more than 15 retries */ - retries = min(retries, 15); - - /* The last transmission may have been successful */ - legacy_success = !!(info->flags & IEEE80211_TX_STAT_ACK); - /* Collect data for each rate used during failed TX attempts */ - for (i = 0; i <= retries; ++i) { - lq_hwrate = le32_to_cpu(table->rs_table[i]); - rs_rate_from_ucode_rate(lq_hwrate, info->band, - &lq_rate); - /* - * Only collect stats if retried rate is in the same RS - * table as active/search. - */ - if (rs_rate_column_match(&lq_rate, &curr_tbl->rate)) - tmp_tbl = curr_tbl; - else if (rs_rate_column_match(&lq_rate, - &other_tbl->rate)) - tmp_tbl = other_tbl; - else - continue; - - rs_collect_tx_data(mvm, lq_sta, tmp_tbl, lq_rate.index, - 1, i < retries ? 0 : legacy_success, - reduced_txp); - } - - /* Update success/fail counts if not searching for new mode */ - if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { - lq_sta->total_success += legacy_success; - lq_sta->total_failed += retries + (1 - legacy_success); - } - } - /* The last TX rate is cached in lq_sta; it's set in if/else above */ - lq_sta->last_rate_n_flags = lq_hwrate; - IWL_DEBUG_RATE(mvm, "reduced txpower: %d\n", reduced_txp); -done: - /* See if there's a better rate or modulation mode to try. */ - if (sta->supp_rates[info->band]) - rs_rate_scale_perform(mvm, sta, lq_sta, tid); -} - -/* - * mac80211 sends us Tx status - */ -static void rs_mac80211_tx_status(void *mvm_r, - struct ieee80211_supported_band *sband, - struct ieee80211_sta *sta, void *priv_sta, - struct sk_buff *skb) -{ - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; - struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_r; - struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - - if (!iwl_mvm_sta_from_mac80211(sta)->vif) - return; - - if (!ieee80211_is_data(hdr->frame_control) || - info->flags & IEEE80211_TX_CTL_NO_ACK) - return; - - iwl_mvm_rs_tx_status(mvm, sta, rs_get_tid(hdr), info); -} - -/* - * Begin a period of staying with a selected modulation mode. - * Set "stay_in_tbl" flag to prevent any mode switches. - * Set frame tx success limits according to legacy vs. high-throughput, - * and reset overall (spanning all rates) tx success history statistics. - * These control how long we stay using same modulation mode before - * searching for a new mode. - */ -static void rs_set_stay_in_table(struct iwl_mvm *mvm, u8 is_legacy, - struct iwl_lq_sta *lq_sta) -{ - IWL_DEBUG_RATE(mvm, "Moving to RS_STATE_STAY_IN_COLUMN\n"); - lq_sta->rs_state = RS_STATE_STAY_IN_COLUMN; - if (is_legacy) { - lq_sta->table_count_limit = IWL_MVM_RS_LEGACY_TABLE_COUNT; - lq_sta->max_failure_limit = IWL_MVM_RS_LEGACY_FAILURE_LIMIT; - lq_sta->max_success_limit = IWL_MVM_RS_LEGACY_SUCCESS_LIMIT; - } else { - lq_sta->table_count_limit = IWL_MVM_RS_NON_LEGACY_TABLE_COUNT; - lq_sta->max_failure_limit = IWL_MVM_RS_NON_LEGACY_FAILURE_LIMIT; - lq_sta->max_success_limit = IWL_MVM_RS_NON_LEGACY_SUCCESS_LIMIT; - } - lq_sta->table_count = 0; - lq_sta->total_failed = 0; - lq_sta->total_success = 0; - lq_sta->flush_timer = jiffies; - lq_sta->visited_columns = 0; -} - -static inline int rs_get_max_rate_from_mask(unsigned long rate_mask) -{ - if (rate_mask) - return find_last_bit(&rate_mask, BITS_PER_LONG); - return IWL_RATE_INVALID; -} - -static int rs_get_max_allowed_rate(struct iwl_lq_sta *lq_sta, - const struct rs_tx_column *column) -{ - switch (column->mode) { - case RS_LEGACY: - return lq_sta->max_legacy_rate_idx; - case RS_SISO: - return lq_sta->max_siso_rate_idx; - case RS_MIMO2: - return lq_sta->max_mimo2_rate_idx; - default: - WARN_ON_ONCE(1); - } - - return lq_sta->max_legacy_rate_idx; -} - -static const u16 *rs_get_expected_tpt_table(struct iwl_lq_sta *lq_sta, - const struct rs_tx_column *column, - u32 bw) -{ - /* Used to choose among HT tables */ - const u16 (*ht_tbl_pointer)[IWL_RATE_COUNT]; - - if (WARN_ON_ONCE(column->mode != RS_LEGACY && - column->mode != RS_SISO && - column->mode != RS_MIMO2)) - return expected_tpt_legacy; - - /* Legacy rates have only one table */ - if (column->mode == RS_LEGACY) - return expected_tpt_legacy; - - ht_tbl_pointer = expected_tpt_mimo2_20MHz; - /* Choose among many HT tables depending on number of streams - * (SISO/MIMO2), channel width (20/40/80), SGI, and aggregation - * status */ - if (column->mode == RS_SISO) { - switch (bw) { - case RATE_MCS_CHAN_WIDTH_20: - ht_tbl_pointer = expected_tpt_siso_20MHz; - break; - case RATE_MCS_CHAN_WIDTH_40: - ht_tbl_pointer = expected_tpt_siso_40MHz; - break; - case RATE_MCS_CHAN_WIDTH_80: - ht_tbl_pointer = expected_tpt_siso_80MHz; - break; - default: - WARN_ON_ONCE(1); - } - } else if (column->mode == RS_MIMO2) { - switch (bw) { - case RATE_MCS_CHAN_WIDTH_20: - ht_tbl_pointer = expected_tpt_mimo2_20MHz; - break; - case RATE_MCS_CHAN_WIDTH_40: - ht_tbl_pointer = expected_tpt_mimo2_40MHz; - break; - case RATE_MCS_CHAN_WIDTH_80: - ht_tbl_pointer = expected_tpt_mimo2_80MHz; - break; - default: - WARN_ON_ONCE(1); - } - } else { - WARN_ON_ONCE(1); - } - - if (!column->sgi && !lq_sta->is_agg) /* Normal */ - return ht_tbl_pointer[0]; - else if (column->sgi && !lq_sta->is_agg) /* SGI */ - return ht_tbl_pointer[1]; - else if (!column->sgi && lq_sta->is_agg) /* AGG */ - return ht_tbl_pointer[2]; - else /* AGG+SGI */ - return ht_tbl_pointer[3]; -} - -static void rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, - struct iwl_scale_tbl_info *tbl) -{ - struct rs_rate *rate = &tbl->rate; - const struct rs_tx_column *column = &rs_tx_columns[tbl->column]; - - tbl->expected_tpt = rs_get_expected_tpt_table(lq_sta, column, rate->bw); -} - -static s32 rs_get_best_rate(struct iwl_mvm *mvm, - struct iwl_lq_sta *lq_sta, - struct iwl_scale_tbl_info *tbl, /* "search" */ - unsigned long rate_mask, s8 index) -{ - struct iwl_scale_tbl_info *active_tbl = - &(lq_sta->lq_info[lq_sta->active_tbl]); - s32 success_ratio = active_tbl->win[index].success_ratio; - u16 expected_current_tpt = active_tbl->expected_tpt[index]; - const u16 *tpt_tbl = tbl->expected_tpt; - u16 high_low; - u32 target_tpt; - int rate_idx; - - if (success_ratio >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) { - target_tpt = 100 * expected_current_tpt; - IWL_DEBUG_RATE(mvm, - "SR %d high. Find rate exceeding EXPECTED_CURRENT %d\n", - success_ratio, target_tpt); - } else { - target_tpt = lq_sta->last_tpt; - IWL_DEBUG_RATE(mvm, - "SR %d not that good. Find rate exceeding ACTUAL_TPT %d\n", - success_ratio, target_tpt); - } - - rate_idx = find_first_bit(&rate_mask, BITS_PER_LONG); - - while (rate_idx != IWL_RATE_INVALID) { - if (target_tpt < (100 * tpt_tbl[rate_idx])) - break; - - high_low = rs_get_adjacent_rate(mvm, rate_idx, rate_mask, - tbl->rate.type); - - rate_idx = (high_low >> 8) & 0xff; - } - - IWL_DEBUG_RATE(mvm, "Best rate found %d target_tp %d expected_new %d\n", - rate_idx, target_tpt, - rate_idx != IWL_RATE_INVALID ? - 100 * tpt_tbl[rate_idx] : IWL_INVALID_VALUE); - - return rate_idx; -} - -static u32 rs_bw_from_sta_bw(struct ieee80211_sta *sta) -{ - if (sta->bandwidth >= IEEE80211_STA_RX_BW_80) - return RATE_MCS_CHAN_WIDTH_80; - else if (sta->bandwidth >= IEEE80211_STA_RX_BW_40) - return RATE_MCS_CHAN_WIDTH_40; - - return RATE_MCS_CHAN_WIDTH_20; -} - -/* - * Check whether we should continue using same modulation mode, or - * begin search for a new mode, based on: - * 1) # tx successes or failures while using this mode - * 2) # times calling this function - * 3) elapsed time in this mode (not used, for now) - */ -static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search) -{ - struct iwl_scale_tbl_info *tbl; - int active_tbl; - int flush_interval_passed = 0; - struct iwl_mvm *mvm; - - mvm = lq_sta->pers.drv; - active_tbl = lq_sta->active_tbl; - - tbl = &(lq_sta->lq_info[active_tbl]); - - /* If we've been disallowing search, see if we should now allow it */ - if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) { - /* Elapsed time using current modulation mode */ - if (lq_sta->flush_timer) - flush_interval_passed = - time_after(jiffies, - (unsigned long)(lq_sta->flush_timer + - (IWL_MVM_RS_STAY_IN_COLUMN_TIMEOUT * HZ))); - - /* - * Check if we should allow search for new modulation mode. - * If many frames have failed or succeeded, or we've used - * this same modulation for a long time, allow search, and - * reset history stats that keep track of whether we should - * allow a new search. Also (below) reset all bitmaps and - * stats in active history. - */ - if (force_search || - (lq_sta->total_failed > lq_sta->max_failure_limit) || - (lq_sta->total_success > lq_sta->max_success_limit) || - ((!lq_sta->search_better_tbl) && - (lq_sta->flush_timer) && (flush_interval_passed))) { - IWL_DEBUG_RATE(mvm, - "LQ: stay is expired %d %d %d\n", - lq_sta->total_failed, - lq_sta->total_success, - flush_interval_passed); - - /* Allow search for new mode */ - lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_STARTED; - IWL_DEBUG_RATE(mvm, - "Moving to RS_STATE_SEARCH_CYCLE_STARTED\n"); - lq_sta->total_failed = 0; - lq_sta->total_success = 0; - lq_sta->flush_timer = 0; - /* mark the current column as visited */ - lq_sta->visited_columns = BIT(tbl->column); - /* - * Else if we've used this modulation mode enough repetitions - * (regardless of elapsed time or success/failure), reset - * history bitmaps and rate-specific stats for all rates in - * active table. - */ - } else { - lq_sta->table_count++; - if (lq_sta->table_count >= - lq_sta->table_count_limit) { - lq_sta->table_count = 0; - - IWL_DEBUG_RATE(mvm, - "LQ: stay in table clear win\n"); - rs_rate_scale_clear_tbl_windows(mvm, tbl); - } - } - - /* If transitioning to allow "search", reset all history - * bitmaps and stats in active table (this will become the new - * "search" table). */ - if (lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED) { - rs_rate_scale_clear_tbl_windows(mvm, tbl); - } - } -} - -/* - * setup rate table in uCode - */ -static void rs_update_rate_tbl(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, - struct iwl_scale_tbl_info *tbl) -{ - rs_fill_lq_cmd(mvm, sta, lq_sta, &tbl->rate); - iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, false); -} - -static bool rs_tweak_rate_tbl(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, - struct iwl_scale_tbl_info *tbl, - enum rs_action scale_action) -{ - if (sta->bandwidth != IEEE80211_STA_RX_BW_80) - return false; - - if (!is_vht_siso(&tbl->rate)) - return false; - - if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_80) && - (tbl->rate.index == IWL_RATE_MCS_0_INDEX) && - (scale_action == RS_ACTION_DOWNSCALE)) { - tbl->rate.bw = RATE_MCS_CHAN_WIDTH_20; - tbl->rate.index = IWL_RATE_MCS_4_INDEX; - IWL_DEBUG_RATE(mvm, "Switch 80Mhz SISO MCS0 -> 20Mhz MCS4\n"); - goto tweaked; - } - - /* Go back to 80Mhz MCS1 only if we've established that 20Mhz MCS5 is - * sustainable, i.e. we're past the test window. We can't go back - * if MCS5 is just tested as this will happen always after switching - * to 20Mhz MCS4 because the rate stats are cleared. - */ - if ((tbl->rate.bw == RATE_MCS_CHAN_WIDTH_20) && - (((tbl->rate.index == IWL_RATE_MCS_5_INDEX) && - (scale_action == RS_ACTION_STAY)) || - ((tbl->rate.index > IWL_RATE_MCS_5_INDEX) && - (scale_action == RS_ACTION_UPSCALE)))) { - tbl->rate.bw = RATE_MCS_CHAN_WIDTH_80; - tbl->rate.index = IWL_RATE_MCS_1_INDEX; - IWL_DEBUG_RATE(mvm, "Switch 20Mhz SISO MCS5 -> 80Mhz MCS1\n"); - goto tweaked; - } - - return false; - -tweaked: - rs_set_expected_tpt_table(lq_sta, tbl); - rs_rate_scale_clear_tbl_windows(mvm, tbl); - return true; -} - -static enum rs_column rs_get_next_column(struct iwl_mvm *mvm, - struct iwl_lq_sta *lq_sta, - struct ieee80211_sta *sta, - struct iwl_scale_tbl_info *tbl) -{ - int i, j, max_rate; - enum rs_column next_col_id; - const struct rs_tx_column *curr_col = &rs_tx_columns[tbl->column]; - const struct rs_tx_column *next_col; - allow_column_func_t allow_func; - u8 valid_ants = iwl_mvm_get_valid_tx_ant(mvm); - const u16 *expected_tpt_tbl; - u16 tpt, max_expected_tpt; - - for (i = 0; i < MAX_NEXT_COLUMNS; i++) { - next_col_id = curr_col->next_columns[i]; - - if (next_col_id == RS_COLUMN_INVALID) - continue; - - if (lq_sta->visited_columns & BIT(next_col_id)) { - IWL_DEBUG_RATE(mvm, "Skip already visited column %d\n", - next_col_id); - continue; - } - - next_col = &rs_tx_columns[next_col_id]; - - if (!rs_is_valid_ant(valid_ants, next_col->ant)) { - IWL_DEBUG_RATE(mvm, - "Skip column %d as ANT config isn't supported by chip. valid_ants 0x%x column ant 0x%x\n", - next_col_id, valid_ants, next_col->ant); - continue; - } - - for (j = 0; j < MAX_COLUMN_CHECKS; j++) { - allow_func = next_col->checks[j]; - if (allow_func && !allow_func(mvm, sta, &tbl->rate, - next_col)) - break; - } - - if (j != MAX_COLUMN_CHECKS) { - IWL_DEBUG_RATE(mvm, - "Skip column %d: not allowed (check %d failed)\n", - next_col_id, j); - - continue; - } - - tpt = lq_sta->last_tpt / 100; - expected_tpt_tbl = rs_get_expected_tpt_table(lq_sta, next_col, - rs_bw_from_sta_bw(sta)); - if (WARN_ON_ONCE(!expected_tpt_tbl)) - continue; - - max_rate = rs_get_max_allowed_rate(lq_sta, next_col); - if (max_rate == IWL_RATE_INVALID) { - IWL_DEBUG_RATE(mvm, - "Skip column %d: no rate is allowed in this column\n", - next_col_id); - continue; - } - - max_expected_tpt = expected_tpt_tbl[max_rate]; - if (tpt >= max_expected_tpt) { - IWL_DEBUG_RATE(mvm, - "Skip column %d: can't beat current TPT. Max expected %d current %d\n", - next_col_id, max_expected_tpt, tpt); - continue; - } - - IWL_DEBUG_RATE(mvm, - "Found potential column %d. Max expected %d current %d\n", - next_col_id, max_expected_tpt, tpt); - break; - } - - if (i == MAX_NEXT_COLUMNS) - return RS_COLUMN_INVALID; - - return next_col_id; -} - -static int rs_switch_to_column(struct iwl_mvm *mvm, - struct iwl_lq_sta *lq_sta, - struct ieee80211_sta *sta, - enum rs_column col_id) -{ - 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 rs_rate *rate = &search_tbl->rate; - const struct rs_tx_column *column = &rs_tx_columns[col_id]; - const struct rs_tx_column *curr_column = &rs_tx_columns[tbl->column]; - u32 sz = (sizeof(struct iwl_scale_tbl_info) - - (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); - unsigned long rate_mask = 0; - u32 rate_idx = 0; - - memcpy(search_tbl, tbl, sz); - - rate->sgi = column->sgi; - rate->ant = column->ant; - - if (column->mode == RS_LEGACY) { - if (lq_sta->band == IEEE80211_BAND_5GHZ) - rate->type = LQ_LEGACY_A; - else - rate->type = LQ_LEGACY_G; - - rate->bw = RATE_MCS_CHAN_WIDTH_20; - rate->ldpc = false; - rate_mask = lq_sta->active_legacy_rate; - } else if (column->mode == RS_SISO) { - rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO; - rate_mask = lq_sta->active_siso_rate; - } else if (column->mode == RS_MIMO2) { - rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2; - rate_mask = lq_sta->active_mimo2_rate; - } else { - WARN_ON_ONCE("Bad column mode"); - } - - if (column->mode != RS_LEGACY) { - 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); - - lq_sta->visited_columns |= BIT(col_id); - - /* Get the best matching rate if we're changing modes. e.g. - * SISO->MIMO, LEGACY->SISO, MIMO->SISO - */ - if (curr_column->mode != column->mode) { - rate_idx = rs_get_best_rate(mvm, lq_sta, search_tbl, - rate_mask, rate->index); - - if ((rate_idx == IWL_RATE_INVALID) || - !(BIT(rate_idx) & rate_mask)) { - IWL_DEBUG_RATE(mvm, - "can not switch with index %d" - " rate mask %lx\n", - rate_idx, rate_mask); - - goto err; - } - - rate->index = rate_idx; - } - - IWL_DEBUG_RATE(mvm, "Switched to column %d: Index %d\n", - col_id, rate->index); - - return 0; - -err: - rate->type = LQ_NONE; - return -1; -} - -static enum rs_action rs_get_rate_action(struct iwl_mvm *mvm, - struct iwl_scale_tbl_info *tbl, - s32 sr, int low, int high, - int current_tpt, - int low_tpt, int high_tpt) -{ - enum rs_action action = RS_ACTION_STAY; - - if ((sr <= RS_PERCENT(IWL_MVM_RS_SR_FORCE_DECREASE)) || - (current_tpt == 0)) { - IWL_DEBUG_RATE(mvm, - "Decrease rate because of low SR\n"); - return RS_ACTION_DOWNSCALE; - } - - if ((low_tpt == IWL_INVALID_VALUE) && - (high_tpt == IWL_INVALID_VALUE) && - (high != IWL_RATE_INVALID)) { - IWL_DEBUG_RATE(mvm, - "No data about high/low rates. Increase rate\n"); - return RS_ACTION_UPSCALE; - } - - if ((high_tpt == IWL_INVALID_VALUE) && - (high != IWL_RATE_INVALID) && - (low_tpt != IWL_INVALID_VALUE) && - (low_tpt < current_tpt)) { - IWL_DEBUG_RATE(mvm, - "No data about high rate and low rate is worse. Increase rate\n"); - return RS_ACTION_UPSCALE; - } - - if ((high_tpt != IWL_INVALID_VALUE) && - (high_tpt > current_tpt)) { - IWL_DEBUG_RATE(mvm, - "Higher rate is better. Increate rate\n"); - return RS_ACTION_UPSCALE; - } - - if ((low_tpt != IWL_INVALID_VALUE) && - (high_tpt != IWL_INVALID_VALUE) && - (low_tpt < current_tpt) && - (high_tpt < current_tpt)) { - IWL_DEBUG_RATE(mvm, - "Both high and low are worse. Maintain rate\n"); - return RS_ACTION_STAY; - } - - if ((low_tpt != IWL_INVALID_VALUE) && - (low_tpt > current_tpt)) { - IWL_DEBUG_RATE(mvm, - "Lower rate is better\n"); - action = RS_ACTION_DOWNSCALE; - goto out; - } - - if ((low_tpt == IWL_INVALID_VALUE) && - (low != IWL_RATE_INVALID)) { - IWL_DEBUG_RATE(mvm, - "No data about lower rate\n"); - action = RS_ACTION_DOWNSCALE; - goto out; - } - - IWL_DEBUG_RATE(mvm, "Maintain rate\n"); - -out: - if ((action == RS_ACTION_DOWNSCALE) && (low != IWL_RATE_INVALID)) { - if (sr >= RS_PERCENT(IWL_MVM_RS_SR_NO_DECREASE)) { - IWL_DEBUG_RATE(mvm, - "SR is above NO DECREASE. Avoid downscale\n"); - action = RS_ACTION_STAY; - } else if (current_tpt > (100 * tbl->expected_tpt[low])) { - IWL_DEBUG_RATE(mvm, - "Current TPT is higher than max expected in low rate. Avoid downscale\n"); - action = RS_ACTION_STAY; - } else { - IWL_DEBUG_RATE(mvm, "Decrease rate\n"); - } - } - - return action; -} - -static bool rs_stbc_allow(struct iwl_mvm *mvm, struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta) -{ - /* Our chip supports Tx STBC and the peer is an HT/VHT STA which - * supports STBC of at least 1*SS - */ - if (!lq_sta->stbc_capable) - return false; - - if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) - return false; - - return true; -} - -static void rs_get_adjacent_txp(struct iwl_mvm *mvm, int index, - int *weaker, int *stronger) -{ - *weaker = index + IWL_MVM_RS_TPC_TX_POWER_STEP; - if (*weaker > TPC_MAX_REDUCTION) - *weaker = TPC_INVALID; - - *stronger = index - IWL_MVM_RS_TPC_TX_POWER_STEP; - if (*stronger < 0) - *stronger = TPC_INVALID; -} - -static bool rs_tpc_allowed(struct iwl_mvm *mvm, struct ieee80211_vif *vif, - struct rs_rate *rate, enum ieee80211_band band) -{ - int index = rate->index; - bool cam = (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM); - bool sta_ps_disabled = (vif->type == NL80211_IFTYPE_STATION && - !vif->bss_conf.ps); - - IWL_DEBUG_RATE(mvm, "cam: %d sta_ps_disabled %d\n", - cam, sta_ps_disabled); - /* - * allow tpc only if power management is enabled, or bt coex - * activity grade allows it and we are on 2.4Ghz. - */ - if ((cam || sta_ps_disabled) && - !iwl_mvm_bt_coex_is_tpc_allowed(mvm, band)) - return false; - - IWL_DEBUG_RATE(mvm, "check rate, table type: %d\n", rate->type); - if (is_legacy(rate)) - return index == IWL_RATE_54M_INDEX; - if (is_ht(rate)) - return index == IWL_RATE_MCS_7_INDEX; - if (is_vht(rate)) - return index == IWL_RATE_MCS_7_INDEX || - index == IWL_RATE_MCS_8_INDEX || - index == IWL_RATE_MCS_9_INDEX; - - WARN_ON_ONCE(1); - return false; -} - -enum tpc_action { - TPC_ACTION_STAY, - TPC_ACTION_DECREASE, - TPC_ACTION_INCREASE, - TPC_ACTION_NO_RESTIRCTION, -}; - -static enum tpc_action rs_get_tpc_action(struct iwl_mvm *mvm, - s32 sr, int weak, int strong, - int current_tpt, - int weak_tpt, int strong_tpt) -{ - /* stay until we have valid tpt */ - if (current_tpt == IWL_INVALID_VALUE) { - IWL_DEBUG_RATE(mvm, "no current tpt. stay.\n"); - return TPC_ACTION_STAY; - } - - /* Too many failures, increase txp */ - if (sr <= RS_PERCENT(IWL_MVM_RS_TPC_SR_FORCE_INCREASE) || - current_tpt == 0) { - IWL_DEBUG_RATE(mvm, "increase txp because of weak SR\n"); - return TPC_ACTION_NO_RESTIRCTION; - } - - /* try decreasing first if applicable */ - if (weak != TPC_INVALID) { - if (weak_tpt == IWL_INVALID_VALUE && - (strong_tpt == IWL_INVALID_VALUE || - current_tpt >= strong_tpt)) { - IWL_DEBUG_RATE(mvm, - "no weak txp measurement. decrease txp\n"); - return TPC_ACTION_DECREASE; - } - - if (weak_tpt > current_tpt) { - IWL_DEBUG_RATE(mvm, - "lower txp has better tpt. decrease txp\n"); - return TPC_ACTION_DECREASE; - } - } - - /* next, increase if needed */ - if (sr < RS_PERCENT(IWL_MVM_RS_TPC_SR_NO_INCREASE) && - strong != TPC_INVALID) { - if (weak_tpt == IWL_INVALID_VALUE && - strong_tpt != IWL_INVALID_VALUE && - current_tpt < strong_tpt) { - IWL_DEBUG_RATE(mvm, - "higher txp has better tpt. increase txp\n"); - return TPC_ACTION_INCREASE; - } - - if (weak_tpt < current_tpt && - (strong_tpt == IWL_INVALID_VALUE || - strong_tpt > current_tpt)) { - IWL_DEBUG_RATE(mvm, - "lower txp has worse tpt. increase txp\n"); - return TPC_ACTION_INCREASE; - } - } - - IWL_DEBUG_RATE(mvm, "no need to increase or decrease txp - stay\n"); - return TPC_ACTION_STAY; -} - -static bool rs_tpc_perform(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, - struct iwl_scale_tbl_info *tbl) -{ - struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); - struct ieee80211_vif *vif = mvm_sta->vif; - struct ieee80211_chanctx_conf *chanctx_conf; - enum ieee80211_band band; - struct iwl_rate_scale_data *window; - struct rs_rate *rate = &tbl->rate; - enum tpc_action action; - s32 sr; - u8 cur = lq_sta->lq.reduced_tpc; - int current_tpt; - int weak, strong; - int weak_tpt = IWL_INVALID_VALUE, strong_tpt = IWL_INVALID_VALUE; - -#ifdef CONFIG_MAC80211_DEBUGFS - if (lq_sta->pers.dbg_fixed_txp_reduction <= TPC_MAX_REDUCTION) { - IWL_DEBUG_RATE(mvm, "fixed tpc: %d\n", - lq_sta->pers.dbg_fixed_txp_reduction); - lq_sta->lq.reduced_tpc = lq_sta->pers.dbg_fixed_txp_reduction; - return cur != lq_sta->pers.dbg_fixed_txp_reduction; - } -#endif - - rcu_read_lock(); - chanctx_conf = rcu_dereference(vif->chanctx_conf); - if (WARN_ON(!chanctx_conf)) - band = IEEE80211_NUM_BANDS; - else - band = chanctx_conf->def.chan->band; - rcu_read_unlock(); - - if (!rs_tpc_allowed(mvm, vif, rate, band)) { - IWL_DEBUG_RATE(mvm, - "tpc is not allowed. remove txp restrictions\n"); - lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION; - return cur != TPC_NO_REDUCTION; - } - - rs_get_adjacent_txp(mvm, cur, &weak, &strong); - - /* Collect measured throughputs for current and adjacent rates */ - window = tbl->tpc_win; - sr = window[cur].success_ratio; - current_tpt = window[cur].average_tpt; - if (weak != TPC_INVALID) - weak_tpt = window[weak].average_tpt; - if (strong != TPC_INVALID) - strong_tpt = window[strong].average_tpt; - - IWL_DEBUG_RATE(mvm, - "(TPC: %d): cur_tpt %d SR %d weak %d strong %d weak_tpt %d strong_tpt %d\n", - cur, current_tpt, sr, weak, strong, - weak_tpt, strong_tpt); - - action = rs_get_tpc_action(mvm, sr, weak, strong, - current_tpt, weak_tpt, strong_tpt); - - /* override actions if we are on the edge */ - if (weak == TPC_INVALID && action == TPC_ACTION_DECREASE) { - IWL_DEBUG_RATE(mvm, "already in lowest txp, stay\n"); - action = TPC_ACTION_STAY; - } else if (strong == TPC_INVALID && - (action == TPC_ACTION_INCREASE || - action == TPC_ACTION_NO_RESTIRCTION)) { - IWL_DEBUG_RATE(mvm, "already in highest txp, stay\n"); - action = TPC_ACTION_STAY; - } - - switch (action) { - case TPC_ACTION_DECREASE: - lq_sta->lq.reduced_tpc = weak; - return true; - case TPC_ACTION_INCREASE: - lq_sta->lq.reduced_tpc = strong; - return true; - case TPC_ACTION_NO_RESTIRCTION: - lq_sta->lq.reduced_tpc = TPC_NO_REDUCTION; - return true; - case TPC_ACTION_STAY: - /* do nothing */ - break; - } - return false; -} - -/* - * Do rate scaling and search for new modulation mode. - */ -static void rs_rate_scale_perform(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, - int tid) -{ - int low = IWL_RATE_INVALID; - int high = IWL_RATE_INVALID; - int index; - struct iwl_rate_scale_data *window = NULL; - int current_tpt = IWL_INVALID_VALUE; - int low_tpt = IWL_INVALID_VALUE; - int high_tpt = IWL_INVALID_VALUE; - u32 fail_count; - enum rs_action scale_action = RS_ACTION_STAY; - u16 rate_mask; - u8 update_lq = 0; - struct iwl_scale_tbl_info *tbl, *tbl1; - u8 active_tbl = 0; - u8 done_search = 0; - u16 high_low; - s32 sr; - u8 prev_agg = lq_sta->is_agg; - struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); - struct iwl_mvm_tid_data *tid_data; - struct rs_rate *rate; - - lq_sta->is_agg = !!sta_priv->agg_tids; - - /* - * Select rate-scale / modulation-mode table to work with in - * the rest of this function: "search" if searching for better - * modulation mode, or "active" if doing rate scaling within a mode. - */ - if (!lq_sta->search_better_tbl) - active_tbl = lq_sta->active_tbl; - else - active_tbl = 1 - lq_sta->active_tbl; - - tbl = &(lq_sta->lq_info[active_tbl]); - rate = &tbl->rate; - - if (prev_agg != lq_sta->is_agg) { - IWL_DEBUG_RATE(mvm, - "Aggregation changed: prev %d current %d. Update expected TPT table\n", - prev_agg, lq_sta->is_agg); - rs_set_expected_tpt_table(lq_sta, tbl); - rs_rate_scale_clear_tbl_windows(mvm, tbl); - } - - /* current tx rate */ - index = rate->index; - - /* rates available for this association, and for modulation mode */ - rate_mask = rs_get_supported_rates(lq_sta, rate); - - if (!(BIT(index) & rate_mask)) { - IWL_ERR(mvm, "Current Rate is not valid\n"); - if (lq_sta->search_better_tbl) { - /* revert to active table if search table is not valid*/ - rate->type = LQ_NONE; - lq_sta->search_better_tbl = 0; - tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); - rs_update_rate_tbl(mvm, sta, lq_sta, tbl); - } - return; - } - - /* Get expected throughput table and history window for current rate */ - if (!tbl->expected_tpt) { - IWL_ERR(mvm, "tbl->expected_tpt is NULL\n"); - return; - } - - /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ - window = &(tbl->win[index]); - - /* - * If there is not enough history to calculate actual average - * throughput, keep analyzing results of more tx frames, without - * changing rate or mode (bypass most of the rest of this function). - * Set up new rate table in uCode only if old rate is not supported - * in current association (use new rate found above). - */ - fail_count = window->counter - window->success_counter; - if ((fail_count < IWL_MVM_RS_RATE_MIN_FAILURE_TH) && - (window->success_counter < IWL_MVM_RS_RATE_MIN_SUCCESS_TH)) { - IWL_DEBUG_RATE(mvm, - "%s: Test Window: succ %d total %d\n", - rs_pretty_rate(rate), - window->success_counter, window->counter); - - /* Can't calculate this yet; not enough history */ - window->average_tpt = IWL_INVALID_VALUE; - - /* Should we stay with this modulation mode, - * or search for a new one? */ - rs_stay_in_table(lq_sta, false); - - return; - } - - /* If we are searching for better modulation mode, check success. */ - if (lq_sta->search_better_tbl) { - /* If good success, continue using the "search" mode; - * no need to send new link quality command, since we're - * continuing to use the setup that we've been trying. */ - if (window->average_tpt > lq_sta->last_tpt) { - IWL_DEBUG_RATE(mvm, - "SWITCHING TO NEW TABLE SR: %d " - "cur-tpt %d old-tpt %d\n", - window->success_ratio, - window->average_tpt, - lq_sta->last_tpt); - - /* Swap tables; "search" becomes "active" */ - lq_sta->active_tbl = active_tbl; - current_tpt = window->average_tpt; - /* Else poor success; go back to mode in "active" table */ - } else { - IWL_DEBUG_RATE(mvm, - "GOING BACK TO THE OLD TABLE: SR %d " - "cur-tpt %d old-tpt %d\n", - window->success_ratio, - window->average_tpt, - lq_sta->last_tpt); - - /* Nullify "search" table */ - rate->type = LQ_NONE; - - /* Revert to "active" table */ - active_tbl = lq_sta->active_tbl; - tbl = &(lq_sta->lq_info[active_tbl]); - - /* Revert to "active" rate and throughput info */ - index = tbl->rate.index; - current_tpt = lq_sta->last_tpt; - - /* Need to set up a new rate table in uCode */ - update_lq = 1; - } - - /* Either way, we've made a decision; modulation mode - * search is done, allow rate adjustment next time. */ - lq_sta->search_better_tbl = 0; - done_search = 1; /* Don't switch modes below! */ - goto lq_update; - } - - /* (Else) not in search of better modulation mode, try for better - * starting rate, while staying in this mode. */ - high_low = rs_get_adjacent_rate(mvm, index, rate_mask, rate->type); - low = high_low & 0xff; - high = (high_low >> 8) & 0xff; - - /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ - - sr = window->success_ratio; - - /* Collect measured throughputs for current and adjacent rates */ - current_tpt = window->average_tpt; - if (low != IWL_RATE_INVALID) - low_tpt = tbl->win[low].average_tpt; - if (high != IWL_RATE_INVALID) - high_tpt = tbl->win[high].average_tpt; - - IWL_DEBUG_RATE(mvm, - "%s: cur_tpt %d SR %d low %d high %d low_tpt %d high_tpt %d\n", - rs_pretty_rate(rate), current_tpt, sr, - low, high, low_tpt, high_tpt); - - scale_action = rs_get_rate_action(mvm, tbl, sr, low, high, - current_tpt, low_tpt, high_tpt); - - /* Force a search in case BT doesn't like us being in MIMO */ - if (is_mimo(rate) && - !iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) { - IWL_DEBUG_RATE(mvm, - "BT Coex forbids MIMO. Search for new config\n"); - rs_stay_in_table(lq_sta, true); - goto lq_update; - } - - switch (scale_action) { - case RS_ACTION_DOWNSCALE: - /* Decrease starting rate, update uCode's rate table */ - if (low != IWL_RATE_INVALID) { - update_lq = 1; - index = low; - } else { - IWL_DEBUG_RATE(mvm, - "At the bottom rate. Can't decrease\n"); - } - - break; - case RS_ACTION_UPSCALE: - /* Increase starting rate, update uCode's rate table */ - if (high != IWL_RATE_INVALID) { - update_lq = 1; - index = high; - } else { - IWL_DEBUG_RATE(mvm, - "At the top rate. Can't increase\n"); - } - - break; - case RS_ACTION_STAY: - /* No change */ - if (lq_sta->rs_state == RS_STATE_STAY_IN_COLUMN) - update_lq = rs_tpc_perform(mvm, sta, lq_sta, tbl); - break; - default: - break; - } - -lq_update: - /* Replace uCode's rate table for the destination station. */ - if (update_lq) { - tbl->rate.index = index; - if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK) - rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action); - rs_update_rate_tbl(mvm, sta, lq_sta, tbl); - } - - rs_stay_in_table(lq_sta, false); - - /* - * Search for new modulation mode if we're: - * 1) Not changing rates right now - * 2) Not just finishing up a search - * 3) Allowing a new search - */ - if (!update_lq && !done_search && - lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_STARTED - && window->counter) { - enum rs_column next_column; - - /* Save current throughput to compare with "search" throughput*/ - lq_sta->last_tpt = current_tpt; - - IWL_DEBUG_RATE(mvm, - "Start Search: update_lq %d done_search %d rs_state %d win->counter %d\n", - update_lq, done_search, lq_sta->rs_state, - window->counter); - - next_column = rs_get_next_column(mvm, lq_sta, sta, tbl); - if (next_column != RS_COLUMN_INVALID) { - int ret = rs_switch_to_column(mvm, lq_sta, sta, - next_column); - if (!ret) - lq_sta->search_better_tbl = 1; - } else { - IWL_DEBUG_RATE(mvm, - "No more columns to explore in search cycle. Go to RS_STATE_SEARCH_CYCLE_ENDED\n"); - lq_sta->rs_state = RS_STATE_SEARCH_CYCLE_ENDED; - } - - /* If new "search" mode was selected, set up in uCode table */ - if (lq_sta->search_better_tbl) { - /* Access the "search" table, clear its history. */ - tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); - rs_rate_scale_clear_tbl_windows(mvm, tbl); - - /* Use new "search" start rate */ - index = tbl->rate.index; - - rs_dump_rate(mvm, &tbl->rate, - "Switch to SEARCH TABLE:"); - rs_update_rate_tbl(mvm, sta, lq_sta, tbl); - } else { - done_search = 1; - } - } - - if (done_search && lq_sta->rs_state == RS_STATE_SEARCH_CYCLE_ENDED) { - /* 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), - * stay with best antenna legacy modulation for a while - * before next round of mode comparisons. */ - tbl1 = &(lq_sta->lq_info[lq_sta->active_tbl]); - if (is_legacy(&tbl1->rate)) { - IWL_DEBUG_RATE(mvm, "LQ: STAY in legacy table\n"); - - if (tid != IWL_MAX_TID_COUNT) { - tid_data = &sta_priv->tid_data[tid]; - if (tid_data->state != IWL_AGG_OFF) { - IWL_DEBUG_RATE(mvm, - "Stop aggregation on tid %d\n", - tid); - ieee80211_stop_tx_ba_session(sta, tid); - } - } - rs_set_stay_in_table(mvm, 1, lq_sta); - } else { - /* If we're in an HT mode, and all 3 mode switch actions - * have been tried and compared, stay in this best modulation - * mode for a while before next round of mode comparisons. */ - if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && - (lq_sta->tx_agg_tid_en & (1 << tid)) && - (tid != IWL_MAX_TID_COUNT)) { - tid_data = &sta_priv->tid_data[tid]; - if (tid_data->state == IWL_AGG_OFF) { - IWL_DEBUG_RATE(mvm, - "try to aggregate tid %d\n", - tid); - rs_tl_turn_on_agg(mvm, tid, - lq_sta, sta); - } - } - rs_set_stay_in_table(mvm, 0, lq_sta); - } - } -} - -struct rs_init_rate_info { - s8 rssi; - u8 rate_idx; -}; - -static const struct rs_init_rate_info rs_optimal_rates_24ghz_legacy[] = { - { -60, IWL_RATE_54M_INDEX }, - { -64, IWL_RATE_48M_INDEX }, - { -68, IWL_RATE_36M_INDEX }, - { -80, IWL_RATE_24M_INDEX }, - { -84, IWL_RATE_18M_INDEX }, - { -85, IWL_RATE_12M_INDEX }, - { -86, IWL_RATE_11M_INDEX }, - { -88, IWL_RATE_5M_INDEX }, - { -90, IWL_RATE_2M_INDEX }, - { S8_MIN, IWL_RATE_1M_INDEX }, -}; - -static const struct rs_init_rate_info rs_optimal_rates_5ghz_legacy[] = { - { -60, IWL_RATE_54M_INDEX }, - { -64, IWL_RATE_48M_INDEX }, - { -72, IWL_RATE_36M_INDEX }, - { -80, IWL_RATE_24M_INDEX }, - { -84, IWL_RATE_18M_INDEX }, - { -85, IWL_RATE_12M_INDEX }, - { -87, IWL_RATE_9M_INDEX }, - { S8_MIN, IWL_RATE_6M_INDEX }, -}; - -static const struct rs_init_rate_info rs_optimal_rates_ht[] = { - { -60, IWL_RATE_MCS_7_INDEX }, - { -64, IWL_RATE_MCS_6_INDEX }, - { -68, IWL_RATE_MCS_5_INDEX }, - { -72, IWL_RATE_MCS_4_INDEX }, - { -80, IWL_RATE_MCS_3_INDEX }, - { -84, IWL_RATE_MCS_2_INDEX }, - { -85, IWL_RATE_MCS_1_INDEX }, - { S8_MIN, IWL_RATE_MCS_0_INDEX}, -}; - -static const struct rs_init_rate_info rs_optimal_rates_vht_20mhz[] = { - { -60, IWL_RATE_MCS_8_INDEX }, - { -64, IWL_RATE_MCS_7_INDEX }, - { -68, IWL_RATE_MCS_6_INDEX }, - { -72, IWL_RATE_MCS_5_INDEX }, - { -80, IWL_RATE_MCS_4_INDEX }, - { -84, IWL_RATE_MCS_3_INDEX }, - { -85, IWL_RATE_MCS_2_INDEX }, - { -87, IWL_RATE_MCS_1_INDEX }, - { S8_MIN, IWL_RATE_MCS_0_INDEX}, -}; - -static const struct rs_init_rate_info rs_optimal_rates_vht_40_80mhz[] = { - { -60, IWL_RATE_MCS_9_INDEX }, - { -64, IWL_RATE_MCS_8_INDEX }, - { -68, IWL_RATE_MCS_7_INDEX }, - { -72, IWL_RATE_MCS_6_INDEX }, - { -80, IWL_RATE_MCS_5_INDEX }, - { -84, IWL_RATE_MCS_4_INDEX }, - { -85, IWL_RATE_MCS_3_INDEX }, - { -87, IWL_RATE_MCS_2_INDEX }, - { -88, IWL_RATE_MCS_1_INDEX }, - { S8_MIN, IWL_RATE_MCS_0_INDEX }, -}; - -/* Init the optimal rate based on STA caps - * This combined with rssi is used to report the last tx rate - * to userspace when we haven't transmitted enough frames. - */ -static void rs_init_optimal_rate(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta) -{ - struct rs_rate *rate = &lq_sta->optimal_rate; - - if (lq_sta->max_mimo2_rate_idx != IWL_RATE_INVALID) - rate->type = lq_sta->is_vht ? LQ_VHT_MIMO2 : LQ_HT_MIMO2; - else if (lq_sta->max_siso_rate_idx != IWL_RATE_INVALID) - rate->type = lq_sta->is_vht ? LQ_VHT_SISO : LQ_HT_SISO; - else if (lq_sta->band == IEEE80211_BAND_5GHZ) - rate->type = LQ_LEGACY_A; - else - rate->type = LQ_LEGACY_G; - - rate->bw = rs_bw_from_sta_bw(sta); - rate->sgi = rs_sgi_allow(mvm, sta, rate, NULL); - - /* ANT/LDPC/STBC aren't relevant for the rate reported to userspace */ - - if (is_mimo(rate)) { - lq_sta->optimal_rate_mask = lq_sta->active_mimo2_rate; - } else if (is_siso(rate)) { - lq_sta->optimal_rate_mask = lq_sta->active_siso_rate; - } else { - lq_sta->optimal_rate_mask = lq_sta->active_legacy_rate; - - if (lq_sta->band == IEEE80211_BAND_5GHZ) { - lq_sta->optimal_rates = rs_optimal_rates_5ghz_legacy; - lq_sta->optimal_nentries = - ARRAY_SIZE(rs_optimal_rates_5ghz_legacy); - } else { - lq_sta->optimal_rates = rs_optimal_rates_24ghz_legacy; - lq_sta->optimal_nentries = - ARRAY_SIZE(rs_optimal_rates_24ghz_legacy); - } - } - - if (is_vht(rate)) { - if (rate->bw == RATE_MCS_CHAN_WIDTH_20) { - lq_sta->optimal_rates = rs_optimal_rates_vht_20mhz; - lq_sta->optimal_nentries = - ARRAY_SIZE(rs_optimal_rates_vht_20mhz); - } else { - lq_sta->optimal_rates = rs_optimal_rates_vht_40_80mhz; - lq_sta->optimal_nentries = - ARRAY_SIZE(rs_optimal_rates_vht_40_80mhz); - } - } else if (is_ht(rate)) { - lq_sta->optimal_rates = rs_optimal_rates_ht; - lq_sta->optimal_nentries = ARRAY_SIZE(rs_optimal_rates_ht); - } -} - -/* Compute the optimal rate index based on RSSI */ -static struct rs_rate *rs_get_optimal_rate(struct iwl_mvm *mvm, - struct iwl_lq_sta *lq_sta) -{ - struct rs_rate *rate = &lq_sta->optimal_rate; - int i; - - rate->index = find_first_bit(&lq_sta->optimal_rate_mask, - BITS_PER_LONG); - - for (i = 0; i < lq_sta->optimal_nentries; i++) { - int rate_idx = lq_sta->optimal_rates[i].rate_idx; - - if ((lq_sta->pers.last_rssi >= lq_sta->optimal_rates[i].rssi) && - (BIT(rate_idx) & lq_sta->optimal_rate_mask)) { - rate->index = rate_idx; - break; - } - } - - return rate; -} - -/* Choose an initial legacy rate and antenna to use based on the RSSI - * of last Rx - */ -static void rs_get_initial_rate(struct iwl_mvm *mvm, - struct iwl_lq_sta *lq_sta, - enum ieee80211_band band, - struct rs_rate *rate) -{ - int i, nentries; - s8 best_rssi = S8_MIN; - u8 best_ant = ANT_NONE; - u8 valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); - const struct rs_init_rate_info *initial_rates; - - for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) { - if (!(lq_sta->pers.chains & BIT(i))) - continue; - - if (lq_sta->pers.chain_signal[i] > best_rssi) { - best_rssi = lq_sta->pers.chain_signal[i]; - best_ant = BIT(i); - } - } - - IWL_DEBUG_RATE(mvm, "Best ANT: %s Best RSSI: %d\n", - rs_pretty_ant(best_ant), best_rssi); - - if (best_ant != ANT_A && best_ant != ANT_B) - rate->ant = first_antenna(valid_tx_ant); - else - rate->ant = best_ant; - - rate->sgi = false; - rate->ldpc = false; - rate->bw = RATE_MCS_CHAN_WIDTH_20; - - rate->index = find_first_bit(&lq_sta->active_legacy_rate, - BITS_PER_LONG); - - if (band == IEEE80211_BAND_5GHZ) { - rate->type = LQ_LEGACY_A; - initial_rates = rs_optimal_rates_5ghz_legacy; - nentries = ARRAY_SIZE(rs_optimal_rates_5ghz_legacy); - } else { - rate->type = LQ_LEGACY_G; - initial_rates = rs_optimal_rates_24ghz_legacy; - nentries = ARRAY_SIZE(rs_optimal_rates_24ghz_legacy); - } - - if (IWL_MVM_RS_RSSI_BASED_INIT_RATE) { - for (i = 0; i < nentries; i++) { - int rate_idx = initial_rates[i].rate_idx; - if ((best_rssi >= initial_rates[i].rssi) && - (BIT(rate_idx) & lq_sta->active_legacy_rate)) { - rate->index = rate_idx; - break; - } - } - } - - IWL_DEBUG_RATE(mvm, "rate_idx %d ANT %s\n", rate->index, - rs_pretty_ant(rate->ant)); -} - -/* Save info about RSSI of last Rx */ -void rs_update_last_rssi(struct iwl_mvm *mvm, - struct iwl_lq_sta *lq_sta, - struct ieee80211_rx_status *rx_status) -{ - int i; - - lq_sta->pers.chains = rx_status->chains; - lq_sta->pers.chain_signal[0] = rx_status->chain_signal[0]; - lq_sta->pers.chain_signal[1] = rx_status->chain_signal[1]; - lq_sta->pers.chain_signal[2] = rx_status->chain_signal[2]; - lq_sta->pers.last_rssi = S8_MIN; - - for (i = 0; i < ARRAY_SIZE(lq_sta->pers.chain_signal); i++) { - if (!(lq_sta->pers.chains & BIT(i))) - continue; - - if (lq_sta->pers.chain_signal[i] > lq_sta->pers.last_rssi) - lq_sta->pers.last_rssi = lq_sta->pers.chain_signal[i]; - } -} - -/** - * rs_initialize_lq - Initialize a station's hardware rate table - * - * The uCode's station table contains a table of fallback rates - * for automatic fallback during transmission. - * - * NOTE: This sets up a default set of values. These will be replaced later - * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of - * rc80211_simple. - * - * NOTE: Run REPLY_ADD_STA command to set up station table entry, before - * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, - * which requires station table entry to exist). - */ -static void rs_initialize_lq(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, - enum ieee80211_band band, - bool init) -{ - struct iwl_scale_tbl_info *tbl; - struct rs_rate *rate; - u8 active_tbl = 0; - - if (!sta || !lq_sta) - return; - - if (!lq_sta->search_better_tbl) - active_tbl = lq_sta->active_tbl; - else - active_tbl = 1 - lq_sta->active_tbl; - - tbl = &(lq_sta->lq_info[active_tbl]); - rate = &tbl->rate; - - rs_get_initial_rate(mvm, lq_sta, band, rate); - rs_init_optimal_rate(mvm, sta, lq_sta); - - WARN_ON_ONCE(rate->ant != ANT_A && rate->ant != ANT_B); - if (rate->ant == ANT_A) - tbl->column = RS_COLUMN_LEGACY_ANT_A; - else - tbl->column = RS_COLUMN_LEGACY_ANT_B; - - rs_set_expected_tpt_table(lq_sta, tbl); - rs_fill_lq_cmd(mvm, sta, lq_sta, rate); - /* TODO restore station should remember the lq cmd */ - iwl_mvm_send_lq_cmd(mvm, &lq_sta->lq, init); -} - -static void rs_get_rate(void *mvm_r, struct ieee80211_sta *sta, void *mvm_sta, - struct ieee80211_tx_rate_control *txrc) -{ - struct sk_buff *skb = txrc->skb; - struct iwl_op_mode *op_mode __maybe_unused = - (struct iwl_op_mode *)mvm_r; - struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - struct iwl_lq_sta *lq_sta = mvm_sta; - struct rs_rate *optimal_rate; - u32 last_ucode_rate; - - if (sta && !iwl_mvm_sta_from_mac80211(sta)->vif) { - /* if vif isn't initialized mvm doesn't know about - * this station, so don't do anything with the it - */ - sta = NULL; - mvm_sta = NULL; - } - - /* TODO: handle rate_idx_mask and rate_idx_mcs_mask */ - - /* Treat uninitialized rate scaling data same as non-existing. */ - if (lq_sta && !lq_sta->pers.drv) { - IWL_DEBUG_RATE(mvm, "Rate scaling not initialized yet.\n"); - mvm_sta = NULL; - } - - /* Send management frames and NO_ACK data using lowest rate. */ - if (rate_control_send_low(sta, mvm_sta, txrc)) - return; - - iwl_mvm_hwrate_to_tx_rate(lq_sta->last_rate_n_flags, - info->band, &info->control.rates[0]); - info->control.rates[0].count = 1; - - /* Report the optimal rate based on rssi and STA caps if we haven't - * converged yet (too little traffic) or exploring other modulations - */ - if (lq_sta->rs_state != RS_STATE_STAY_IN_COLUMN) { - optimal_rate = rs_get_optimal_rate(mvm, lq_sta); - last_ucode_rate = ucode_rate_from_rs_rate(mvm, - optimal_rate); - iwl_mvm_hwrate_to_tx_rate(last_ucode_rate, info->band, - &txrc->reported_rate); - } -} - -static void *rs_alloc_sta(void *mvm_rate, struct ieee80211_sta *sta, - gfp_t gfp) -{ - struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); - struct iwl_op_mode *op_mode = (struct iwl_op_mode *)mvm_rate; - struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); - struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta; - - IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); - - lq_sta->pers.drv = mvm; -#ifdef CONFIG_MAC80211_DEBUGFS - lq_sta->pers.dbg_fixed_rate = 0; - lq_sta->pers.dbg_fixed_txp_reduction = TPC_INVALID; - lq_sta->pers.ss_force = RS_SS_FORCE_NONE; -#endif - lq_sta->pers.chains = 0; - memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); - lq_sta->pers.last_rssi = S8_MIN; - - return &sta_priv->lq_sta; -} - -static int rs_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap, - int nss) -{ - u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & - (0x3 << (2 * (nss - 1))); - rx_mcs >>= (2 * (nss - 1)); - - if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_7) - return IWL_RATE_MCS_7_INDEX; - else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_8) - return IWL_RATE_MCS_8_INDEX; - else if (rx_mcs == IEEE80211_VHT_MCS_SUPPORT_0_9) - return IWL_RATE_MCS_9_INDEX; - - WARN_ON_ONCE(rx_mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED); - return -1; -} - -static void rs_vht_set_enabled_rates(struct ieee80211_sta *sta, - struct ieee80211_sta_vht_cap *vht_cap, - struct iwl_lq_sta *lq_sta) -{ - int i; - int highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 1); - - if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { - for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { - if (i == IWL_RATE_9M_INDEX) - continue; - - /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ - if (i == IWL_RATE_MCS_9_INDEX && - sta->bandwidth == IEEE80211_STA_RX_BW_20) - continue; - - lq_sta->active_siso_rate |= BIT(i); - } - } - - if (sta->rx_nss < 2) - return; - - highest_mcs = rs_vht_highest_rx_mcs_index(vht_cap, 2); - if (highest_mcs >= IWL_RATE_MCS_0_INDEX) { - for (i = IWL_RATE_MCS_0_INDEX; i <= highest_mcs; i++) { - if (i == IWL_RATE_9M_INDEX) - continue; - - /* VHT MCS9 isn't valid for 20Mhz for NSS=1,2 */ - if (i == IWL_RATE_MCS_9_INDEX && - sta->bandwidth == IEEE80211_STA_RX_BW_20) - continue; - - lq_sta->active_mimo2_rate |= BIT(i); - } - } -} - -static void rs_ht_init(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, - struct ieee80211_sta_ht_cap *ht_cap) -{ - /* active_siso_rate mask includes 9 MBits (bit 5), - * and CCK (bits 0-3), supp_rates[] does not; - * shift to convert format, force 9 MBits off. - */ - lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1; - lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1; - lq_sta->active_siso_rate &= ~((u16)0x2); - lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE; - - lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1; - lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1; - lq_sta->active_mimo2_rate &= ~((u16)0x2); - lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE; - - if (mvm->cfg->ht_params->ldpc && - (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING)) - lq_sta->ldpc = true; - - if (mvm->cfg->ht_params->stbc && - (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && - (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)) - lq_sta->stbc_capable = true; - - lq_sta->is_vht = false; -} - -static void rs_vht_init(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, - struct ieee80211_sta_vht_cap *vht_cap) -{ - rs_vht_set_enabled_rates(sta, vht_cap, lq_sta); - - if (mvm->cfg->ht_params->ldpc && - (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)) - lq_sta->ldpc = true; - - if (mvm->cfg->ht_params->stbc && - (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && - (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK)) - lq_sta->stbc_capable = true; - - if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) && - (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && - (vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)) - lq_sta->bfer_capable = true; - - lq_sta->is_vht = true; -} - -#ifdef CONFIG_IWLWIFI_DEBUGFS -static void iwl_mvm_reset_frame_stats(struct iwl_mvm *mvm) -{ - spin_lock_bh(&mvm->drv_stats_lock); - memset(&mvm->drv_rx_stats, 0, sizeof(mvm->drv_rx_stats)); - spin_unlock_bh(&mvm->drv_stats_lock); -} - -void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm, u32 rate, bool agg) -{ - u8 nss = 0, mcs = 0; - - spin_lock(&mvm->drv_stats_lock); - - if (agg) - mvm->drv_rx_stats.agg_frames++; - - mvm->drv_rx_stats.success_frames++; - - switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { - case RATE_MCS_CHAN_WIDTH_20: - mvm->drv_rx_stats.bw_20_frames++; - break; - case RATE_MCS_CHAN_WIDTH_40: - mvm->drv_rx_stats.bw_40_frames++; - break; - case RATE_MCS_CHAN_WIDTH_80: - mvm->drv_rx_stats.bw_80_frames++; - break; - default: - WARN_ONCE(1, "bad BW. rate 0x%x", rate); - } - - if (rate & RATE_MCS_HT_MSK) { - mvm->drv_rx_stats.ht_frames++; - mcs = rate & RATE_HT_MCS_RATE_CODE_MSK; - nss = ((rate & RATE_HT_MCS_NSS_MSK) >> RATE_HT_MCS_NSS_POS) + 1; - } else if (rate & RATE_MCS_VHT_MSK) { - mvm->drv_rx_stats.vht_frames++; - mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; - nss = ((rate & RATE_VHT_MCS_NSS_MSK) >> - RATE_VHT_MCS_NSS_POS) + 1; - } else { - mvm->drv_rx_stats.legacy_frames++; - } - - if (nss == 1) - mvm->drv_rx_stats.siso_frames++; - else if (nss == 2) - mvm->drv_rx_stats.mimo2_frames++; - - if (rate & RATE_MCS_SGI_MSK) - mvm->drv_rx_stats.sgi_frames++; - else - mvm->drv_rx_stats.ngi_frames++; - - mvm->drv_rx_stats.last_rates[mvm->drv_rx_stats.last_frame_idx] = rate; - mvm->drv_rx_stats.last_frame_idx = - (mvm->drv_rx_stats.last_frame_idx + 1) % - ARRAY_SIZE(mvm->drv_rx_stats.last_rates); - - spin_unlock(&mvm->drv_stats_lock); -} -#endif - -/* - * Called after adding a new station to initialize rate scaling - */ -void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, - enum ieee80211_band band, bool init) -{ - int i, j; - struct ieee80211_hw *hw = mvm->hw; - struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; - struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; - struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta); - struct iwl_lq_sta *lq_sta = &sta_priv->lq_sta; - struct ieee80211_supported_band *sband; - unsigned long supp; /* must be unsigned long for for_each_set_bit */ - - /* clear all non-persistent lq data */ - memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); - - sband = hw->wiphy->bands[band]; - - lq_sta->lq.sta_id = sta_priv->sta_id; - - for (j = 0; j < LQ_SIZE; j++) - rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]); - - lq_sta->flush_timer = 0; - lq_sta->last_tx = jiffies; - - IWL_DEBUG_RATE(mvm, - "LQ: *** rate scale station global init for station %d ***\n", - sta_priv->sta_id); - /* TODO: what is a good starting rate for STA? About middle? Maybe not - * the lowest or the highest rate.. Could consider using RSSI from - * previous packets? Need to have IEEE 802.1X auth succeed immediately - * after assoc.. */ - - lq_sta->missed_rate_counter = IWL_MVM_RS_MISSED_RATE_MAX; - lq_sta->band = sband->band; - /* - * active legacy rates as per supported rates bitmap - */ - supp = sta->supp_rates[sband->band]; - lq_sta->active_legacy_rate = 0; - for_each_set_bit(i, &supp, BITS_PER_LONG) - lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value); - - /* TODO: should probably account for rx_highest for both HT/VHT */ - if (!vht_cap || !vht_cap->vht_supported) - rs_ht_init(mvm, sta, lq_sta, ht_cap); - else - rs_vht_init(mvm, sta, lq_sta, vht_cap); - - lq_sta->max_legacy_rate_idx = - rs_get_max_rate_from_mask(lq_sta->active_legacy_rate); - lq_sta->max_siso_rate_idx = - rs_get_max_rate_from_mask(lq_sta->active_siso_rate); - lq_sta->max_mimo2_rate_idx = - rs_get_max_rate_from_mask(lq_sta->active_mimo2_rate); - - IWL_DEBUG_RATE(mvm, - "LEGACY=%lX SISO=%lX MIMO2=%lX VHT=%d LDPC=%d STBC=%d BFER=%d\n", - lq_sta->active_legacy_rate, - lq_sta->active_siso_rate, - lq_sta->active_mimo2_rate, - lq_sta->is_vht, lq_sta->ldpc, lq_sta->stbc_capable, - lq_sta->bfer_capable); - 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, - lq_sta->max_mimo2_rate_idx); - - /* These values will be overridden later */ - lq_sta->lq.single_stream_ant_msk = - first_antenna(iwl_mvm_get_valid_tx_ant(mvm)); - lq_sta->lq.dual_stream_ant_msk = ANT_AB; - - /* as default allow aggregation for all tids */ - lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; - lq_sta->is_agg = 0; -#ifdef CONFIG_IWLWIFI_DEBUGFS - iwl_mvm_reset_frame_stats(mvm); -#endif - rs_initialize_lq(mvm, sta, lq_sta, band, init); -} - -static void rs_rate_update(void *mvm_r, - struct ieee80211_supported_band *sband, - struct cfg80211_chan_def *chandef, - struct ieee80211_sta *sta, void *priv_sta, - u32 changed) -{ - u8 tid; - struct iwl_op_mode *op_mode = - (struct iwl_op_mode *)mvm_r; - struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode); - - if (!iwl_mvm_sta_from_mac80211(sta)->vif) - return; - - /* Stop any ongoing aggregations as rs starts off assuming no agg */ - for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) - ieee80211_stop_tx_ba_session(sta, tid); - - iwl_mvm_rs_rate_init(mvm, sta, sband->band, false); -} - -#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); - u8 ant = (ucode_rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; - - 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; - - lq_cmd->reduced_tpc = 0; - - 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; -} -#endif /* CONFIG_MAC80211_DEBUGFS */ - -static void rs_fill_rates_for_column(struct iwl_mvm *mvm, - struct iwl_lq_sta *lq_sta, - struct rs_rate *rate, - __le32 *rs_table, int *rs_table_index, - int num_rates, int num_retries, - u8 valid_tx_ant, bool toggle_ant) -{ - int i, j; - __le32 ucode_rate; - bool bottom_reached = false; - int prev_rate_idx = rate->index; - int end = LINK_QUAL_MAX_RETRY_NUM; - int index = *rs_table_index; - - for (i = 0; i < num_rates && index < end; i++) { - for (j = 0; j < num_retries && index < end; j++, index++) { - ucode_rate = cpu_to_le32(ucode_rate_from_rs_rate(mvm, - rate)); - rs_table[index] = ucode_rate; - if (toggle_ant) - rs_toggle_antenna(valid_tx_ant, rate); - } - - prev_rate_idx = rate->index; - bottom_reached = rs_get_lower_rate_in_column(lq_sta, rate); - if (bottom_reached && !is_legacy(rate)) - break; - } - - if (!bottom_reached && !is_legacy(rate)) - rate->index = prev_rate_idx; - - *rs_table_index = index; -} - -/* Building the rate table is non trivial. When we're in MIMO2/VHT/80Mhz/SGI - * column the rate table should look like this: - * - * rate[0] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI - * rate[1] 0x400D019 VHT | ANT: AB BW: 80Mhz MCS: 9 NSS: 2 SGI - * rate[2] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI - * rate[3] 0x400D018 VHT | ANT: AB BW: 80Mhz MCS: 8 NSS: 2 SGI - * rate[4] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI - * rate[5] 0x400D017 VHT | ANT: AB BW: 80Mhz MCS: 7 NSS: 2 SGI - * rate[6] 0x4005007 VHT | ANT: A BW: 80Mhz MCS: 7 NSS: 1 NGI - * rate[7] 0x4009006 VHT | ANT: B BW: 80Mhz MCS: 6 NSS: 1 NGI - * rate[8] 0x4005005 VHT | ANT: A BW: 80Mhz MCS: 5 NSS: 1 NGI - * rate[9] 0x800B Legacy | ANT: B Rate: 36 Mbps - * rate[10] 0x4009 Legacy | ANT: A Rate: 24 Mbps - * rate[11] 0x8007 Legacy | ANT: B Rate: 18 Mbps - * rate[12] 0x4005 Legacy | ANT: A Rate: 12 Mbps - * rate[13] 0x800F Legacy | ANT: B Rate: 9 Mbps - * rate[14] 0x400D Legacy | ANT: A Rate: 6 Mbps - * rate[15] 0x800D Legacy | ANT: B Rate: 6 Mbps - */ -static void rs_build_rates_table(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - struct iwl_lq_sta *lq_sta, - const struct rs_rate *initial_rate) -{ - struct rs_rate rate; - int num_rates, num_retries, index = 0; - u8 valid_tx_ant = 0; - struct iwl_lq_cmd *lq_cmd = &lq_sta->lq; - bool toggle_ant = false; - - memcpy(&rate, initial_rate, sizeof(rate)); - - valid_tx_ant = iwl_mvm_get_valid_tx_ant(mvm); - - /* TODO: remove old API when min FW API hits 14 */ - if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS) && - rs_stbc_allow(mvm, sta, lq_sta)) - rate.stbc = true; - - if (is_siso(&rate)) { - num_rates = IWL_MVM_RS_INITIAL_SISO_NUM_RATES; - num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; - } else if (is_mimo(&rate)) { - num_rates = IWL_MVM_RS_INITIAL_MIMO_NUM_RATES; - num_retries = IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE; - } else { - num_rates = IWL_MVM_RS_INITIAL_LEGACY_NUM_RATES; - num_retries = IWL_MVM_RS_INITIAL_LEGACY_RETRIES; - toggle_ant = true; - } - - rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, - num_rates, num_retries, valid_tx_ant, - toggle_ant); - - rs_get_lower_rate_down_column(lq_sta, &rate); - - if (is_siso(&rate)) { - num_rates = IWL_MVM_RS_SECONDARY_SISO_NUM_RATES; - num_retries = IWL_MVM_RS_SECONDARY_SISO_RETRIES; - lq_cmd->mimo_delim = index; - } else if (is_legacy(&rate)) { - num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; - num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; - } else { - WARN_ON_ONCE(1); - } - - toggle_ant = true; - - rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, - num_rates, num_retries, valid_tx_ant, - toggle_ant); - - rs_get_lower_rate_down_column(lq_sta, &rate); - - num_rates = IWL_MVM_RS_SECONDARY_LEGACY_NUM_RATES; - num_retries = IWL_MVM_RS_SECONDARY_LEGACY_RETRIES; - - rs_fill_rates_for_column(mvm, lq_sta, &rate, lq_cmd->rs_table, &index, - num_rates, num_retries, valid_tx_ant, - toggle_ant); - -} - -struct rs_bfer_active_iter_data { - struct ieee80211_sta *exclude_sta; - struct iwl_mvm_sta *bfer_mvmsta; -}; - -static void rs_bfer_active_iter(void *_data, - struct ieee80211_sta *sta) -{ - struct rs_bfer_active_iter_data *data = _data; - struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); - struct iwl_lq_cmd *lq_cmd = &mvmsta->lq_sta.lq; - u32 ss_params = le32_to_cpu(lq_cmd->ss_params); - - if (sta == data->exclude_sta) - return; - - /* The current sta has BFER allowed */ - if (ss_params & LQ_SS_BFER_ALLOWED) { - WARN_ON_ONCE(data->bfer_mvmsta != NULL); - - data->bfer_mvmsta = mvmsta; - } -} - -static int rs_bfer_priority(struct iwl_mvm_sta *sta) -{ - int prio = -1; - enum nl80211_iftype viftype = ieee80211_vif_type_p2p(sta->vif); - - switch (viftype) { - case NL80211_IFTYPE_AP: - case NL80211_IFTYPE_P2P_GO: - prio = 3; - break; - case NL80211_IFTYPE_P2P_CLIENT: - prio = 2; - break; - case NL80211_IFTYPE_STATION: - prio = 1; - break; - default: - WARN_ONCE(true, "viftype %d sta_id %d", viftype, sta->sta_id); - prio = -1; - } - - return prio; -} - -/* Returns >0 if sta1 has a higher BFER priority compared to sta2 */ -static int rs_bfer_priority_cmp(struct iwl_mvm_sta *sta1, - struct iwl_mvm_sta *sta2) -{ - int prio1 = rs_bfer_priority(sta1); - int prio2 = rs_bfer_priority(sta2); - - if (prio1 > prio2) - return 1; - if (prio1 < prio2) - return -1; - return 0; -} - -static void rs_set_lq_ss_params(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; - struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); - struct rs_bfer_active_iter_data data = { - .exclude_sta = sta, - .bfer_mvmsta = NULL, - }; - struct iwl_mvm_sta *bfer_mvmsta = NULL; - u32 ss_params = LQ_SS_PARAMS_VALID; - - if (!iwl_mvm_bt_coex_is_mimo_allowed(mvm, sta)) - goto out; - -#ifdef CONFIG_MAC80211_DEBUGFS - /* Check if forcing the decision is configured. - * Note that SISO is forced by not allowing STBC or BFER - */ - if (lq_sta->pers.ss_force == RS_SS_FORCE_STBC) - ss_params |= (LQ_SS_STBC_1SS_ALLOWED | LQ_SS_FORCE); - else if (lq_sta->pers.ss_force == RS_SS_FORCE_BFER) - ss_params |= (LQ_SS_BFER_ALLOWED | LQ_SS_FORCE); - - if (lq_sta->pers.ss_force != RS_SS_FORCE_NONE) { - IWL_DEBUG_RATE(mvm, "Forcing single stream Tx decision %d\n", - lq_sta->pers.ss_force); - goto out; - } -#endif - - if (lq_sta->stbc_capable) - ss_params |= LQ_SS_STBC_1SS_ALLOWED; - - if (!lq_sta->bfer_capable) - goto out; - - ieee80211_iterate_stations_atomic(mvm->hw, - rs_bfer_active_iter, - &data); - bfer_mvmsta = data.bfer_mvmsta; - - /* This code is safe as it doesn't run concurrently for different - * stations. This is guaranteed by the fact that calls to - * ieee80211_tx_status wouldn't run concurrently for a single HW. - */ - if (!bfer_mvmsta) { - IWL_DEBUG_RATE(mvm, "No sta with BFER allowed found. Allow\n"); - - ss_params |= LQ_SS_BFER_ALLOWED; - goto out; - } - - IWL_DEBUG_RATE(mvm, "Found existing sta %d with BFER activated\n", - bfer_mvmsta->sta_id); - - /* Disallow BFER on another STA if active and we're a higher priority */ - if (rs_bfer_priority_cmp(mvmsta, bfer_mvmsta) > 0) { - struct iwl_lq_cmd *bfersta_lq_cmd = &bfer_mvmsta->lq_sta.lq; - u32 bfersta_ss_params = le32_to_cpu(bfersta_lq_cmd->ss_params); - - bfersta_ss_params &= ~LQ_SS_BFER_ALLOWED; - bfersta_lq_cmd->ss_params = cpu_to_le32(bfersta_ss_params); - iwl_mvm_send_lq_cmd(mvm, bfersta_lq_cmd, false); - - ss_params |= LQ_SS_BFER_ALLOWED; - IWL_DEBUG_RATE(mvm, - "Lower priority BFER sta found (%d). Switch BFER\n", - bfer_mvmsta->sta_id); - } -out: - lq_cmd->ss_params = cpu_to_le32(ss_params); -} - -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; - struct iwl_mvm_sta *mvmsta; - struct iwl_mvm_vif *mvmvif; - - lq_cmd->agg_disable_start_th = IWL_MVM_RS_AGG_DISABLE_START; - lq_cmd->agg_time_limit = - cpu_to_le16(IWL_MVM_RS_AGG_TIME_LIMIT); - -#ifdef CONFIG_MAC80211_DEBUGFS - if (lq_sta->pers.dbg_fixed_rate) { - rs_build_rates_table_from_fixed(mvm, lq_cmd, - lq_sta->band, - lq_sta->pers.dbg_fixed_rate); - return; - } -#endif - if (WARN_ON_ONCE(!sta || !initial_rate)) - return; - - rs_build_rates_table(mvm, sta, lq_sta, initial_rate); - - if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_LQ_SS_PARAMS)) - rs_set_lq_ss_params(mvm, sta, lq_sta, initial_rate); - - mvmsta = iwl_mvm_sta_from_mac80211(sta); - mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif); - - if (num_of_ant(initial_rate->ant) == 1) - lq_cmd->single_stream_ant_msk = initial_rate->ant; - - lq_cmd->agg_frame_cnt_limit = mvmsta->max_agg_bufsize; - - /* - * In case of low latency, tell the firmware to leave a frame in the - * Tx Fifo so that it can start a transaction in the same TxOP. This - * basically allows the firmware to send bursts. - */ - if (iwl_mvm_vif_low_latency(mvmvif)) { - lq_cmd->agg_frame_cnt_limit--; - - if (mvm->low_latency_agg_frame_limit) - lq_cmd->agg_frame_cnt_limit = - min(lq_cmd->agg_frame_cnt_limit, - mvm->low_latency_agg_frame_limit); - } - - if (mvmsta->vif->p2p) - lq_cmd->flags |= LQ_FLAG_USE_RTS_MSK; - - lq_cmd->agg_time_limit = - cpu_to_le16(iwl_mvm_coex_agg_time_limit(mvm, sta)); -} - -static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) -{ - return hw->priv; -} -/* rate scale requires free function to be implemented */ -static void rs_free(void *mvm_rate) -{ - return; -} - -static void rs_free_sta(void *mvm_r, struct ieee80211_sta *sta, - void *mvm_sta) -{ - struct iwl_op_mode *op_mode __maybe_unused = mvm_r; - struct iwl_mvm *mvm __maybe_unused = IWL_OP_MODE_GET_MVM(op_mode); - - IWL_DEBUG_RATE(mvm, "enter\n"); - IWL_DEBUG_RATE(mvm, "leave\n"); -} - -#ifdef CONFIG_MAC80211_DEBUGFS -int rs_pretty_print_rate(char *buf, const u32 rate) -{ - - char *type, *bw; - u8 mcs = 0, nss = 0; - u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; - - if (!(rate & RATE_MCS_HT_MSK) && - !(rate & RATE_MCS_VHT_MSK)) { - int index = iwl_hwrate_to_plcp_idx(rate); - - return sprintf(buf, "Legacy | ANT: %s Rate: %s Mbps\n", - rs_pretty_ant(ant), - index == IWL_RATE_INVALID ? "BAD" : - iwl_rate_mcs[index].mbps); - } - - if (rate & RATE_MCS_VHT_MSK) { - type = "VHT"; - mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; - nss = ((rate & RATE_VHT_MCS_NSS_MSK) - >> RATE_VHT_MCS_NSS_POS) + 1; - } else if (rate & RATE_MCS_HT_MSK) { - type = "HT"; - mcs = rate & RATE_HT_MCS_INDEX_MSK; - } else { - type = "Unknown"; /* shouldn't happen */ - } - - switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { - case RATE_MCS_CHAN_WIDTH_20: - bw = "20Mhz"; - break; - case RATE_MCS_CHAN_WIDTH_40: - bw = "40Mhz"; - break; - case RATE_MCS_CHAN_WIDTH_80: - bw = "80Mhz"; - break; - case RATE_MCS_CHAN_WIDTH_160: - bw = "160Mhz"; - break; - default: - bw = "BAD BW"; - } - - return sprintf(buf, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s\n", - type, rs_pretty_ant(ant), bw, mcs, nss, - (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ", - (rate & RATE_MCS_HT_STBC_MSK) ? "STBC " : "", - (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "", - (rate & RATE_MCS_BF_MSK) ? "BF " : "", - (rate & RATE_MCS_ZLF_MSK) ? "ZLF " : ""); -} - -/** - * Program the device to use fixed rate for frame transmit - * This is for debugging/testing only - * once the device start use fixed rate, we need to reload the module - * to being back the normal operation. - */ -static void rs_program_fix_rate(struct iwl_mvm *mvm, - struct iwl_lq_sta *lq_sta) -{ - lq_sta->active_legacy_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ - lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ - lq_sta->active_mimo2_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ - - IWL_DEBUG_RATE(mvm, "sta_id %d rate 0x%X\n", - lq_sta->lq.sta_id, lq_sta->pers.dbg_fixed_rate); - - if (lq_sta->pers.dbg_fixed_rate) { - rs_fill_lq_cmd(mvm, NULL, lq_sta, NULL); - iwl_mvm_send_lq_cmd(lq_sta->pers.drv, &lq_sta->lq, false); - } -} - -static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, - const char __user *user_buf, size_t count, loff_t *ppos) -{ - struct iwl_lq_sta *lq_sta = file->private_data; - struct iwl_mvm *mvm; - char buf[64]; - size_t buf_size; - u32 parsed_rate; - - mvm = lq_sta->pers.drv; - memset(buf, 0, sizeof(buf)); - buf_size = min(count, sizeof(buf) - 1); - if (copy_from_user(buf, user_buf, buf_size)) - return -EFAULT; - - if (sscanf(buf, "%x", &parsed_rate) == 1) - lq_sta->pers.dbg_fixed_rate = parsed_rate; - else - lq_sta->pers.dbg_fixed_rate = 0; - - rs_program_fix_rate(mvm, lq_sta); - - return count; -} - -static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, - char __user *user_buf, size_t count, loff_t *ppos) -{ - char *buff; - int desc = 0; - int i = 0; - ssize_t ret; - - struct iwl_lq_sta *lq_sta = file->private_data; - struct iwl_mvm *mvm; - struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); - struct rs_rate *rate = &tbl->rate; - u32 ss_params; - mvm = lq_sta->pers.drv; - buff = kmalloc(2048, GFP_KERNEL); - if (!buff) - return -ENOMEM; - - desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); - desc += sprintf(buff+desc, "failed=%d success=%d rate=0%lX\n", - lq_sta->total_failed, lq_sta->total_success, - lq_sta->active_legacy_rate); - desc += sprintf(buff+desc, "fixed rate 0x%X\n", - lq_sta->pers.dbg_fixed_rate); - desc += sprintf(buff+desc, "valid_tx_ant %s%s%s\n", - (iwl_mvm_get_valid_tx_ant(mvm) & ANT_A) ? "ANT_A," : "", - (iwl_mvm_get_valid_tx_ant(mvm) & ANT_B) ? "ANT_B," : "", - (iwl_mvm_get_valid_tx_ant(mvm) & ANT_C) ? "ANT_C" : ""); - desc += sprintf(buff+desc, "lq type %s\n", - (is_legacy(rate)) ? "legacy" : - is_vht(rate) ? "VHT" : "HT"); - if (!is_legacy(rate)) { - desc += sprintf(buff + desc, " %s", - (is_siso(rate)) ? "SISO" : "MIMO2"); - desc += sprintf(buff + desc, " %s", - (is_ht20(rate)) ? "20MHz" : - (is_ht40(rate)) ? "40MHz" : - (is_ht80(rate)) ? "80Mhz" : "BAD BW"); - 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", - lq_sta->last_rate_n_flags); - desc += sprintf(buff+desc, - "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n", - lq_sta->lq.flags, - lq_sta->lq.mimo_delim, - lq_sta->lq.single_stream_ant_msk, - lq_sta->lq.dual_stream_ant_msk); - - desc += sprintf(buff+desc, - "agg: time_limit=%d dist_start_th=%d frame_cnt_limit=%d\n", - le16_to_cpu(lq_sta->lq.agg_time_limit), - lq_sta->lq.agg_disable_start_th, - lq_sta->lq.agg_frame_cnt_limit); - - desc += sprintf(buff+desc, "reduced tpc=%d\n", lq_sta->lq.reduced_tpc); - ss_params = le32_to_cpu(lq_sta->lq.ss_params); - desc += sprintf(buff+desc, "single stream params: %s%s%s%s\n", - (ss_params & LQ_SS_PARAMS_VALID) ? - "VALID" : "INVALID", - (ss_params & LQ_SS_BFER_ALLOWED) ? - ", BFER" : "", - (ss_params & LQ_SS_STBC_1SS_ALLOWED) ? - ", STBC" : "", - (ss_params & LQ_SS_FORCE) ? - ", FORCE" : ""); - desc += sprintf(buff+desc, - "Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", - lq_sta->lq.initial_rate_index[0], - lq_sta->lq.initial_rate_index[1], - lq_sta->lq.initial_rate_index[2], - lq_sta->lq.initial_rate_index[3]); - - for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { - u32 r = le32_to_cpu(lq_sta->lq.rs_table[i]); - - desc += sprintf(buff+desc, " rate[%d] 0x%X ", i, r); - desc += rs_pretty_print_rate(buff+desc, r); - } - - ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); - kfree(buff); - return ret; -} - -static const struct file_operations rs_sta_dbgfs_scale_table_ops = { - .write = rs_sta_dbgfs_scale_table_write, - .read = rs_sta_dbgfs_scale_table_read, - .open = simple_open, - .llseek = default_llseek, -}; -static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, - char __user *user_buf, size_t count, loff_t *ppos) -{ - char *buff; - int desc = 0; - int i, j; - ssize_t ret; - struct iwl_scale_tbl_info *tbl; - struct rs_rate *rate; - struct iwl_lq_sta *lq_sta = file->private_data; - - buff = kmalloc(1024, GFP_KERNEL); - if (!buff) - return -ENOMEM; - - for (i = 0; i < LQ_SIZE; i++) { - tbl = &(lq_sta->lq_info[i]); - rate = &tbl->rate; - desc += sprintf(buff+desc, - "%s type=%d SGI=%d BW=%s DUP=0\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", - rate->index); - for (j = 0; j < IWL_RATE_COUNT; j++) { - desc += sprintf(buff+desc, - "counter=%d success=%d %%=%d\n", - tbl->win[j].counter, - tbl->win[j].success_counter, - tbl->win[j].success_ratio); - } - } - ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); - kfree(buff); - return ret; -} - -static const struct file_operations rs_sta_dbgfs_stats_table_ops = { - .read = rs_sta_dbgfs_stats_table_read, - .open = simple_open, - .llseek = default_llseek, -}; - -static ssize_t rs_sta_dbgfs_drv_tx_stats_read(struct file *file, - char __user *user_buf, - size_t count, loff_t *ppos) -{ - static const char * const column_name[] = { - [RS_COLUMN_LEGACY_ANT_A] = "LEGACY_ANT_A", - [RS_COLUMN_LEGACY_ANT_B] = "LEGACY_ANT_B", - [RS_COLUMN_SISO_ANT_A] = "SISO_ANT_A", - [RS_COLUMN_SISO_ANT_B] = "SISO_ANT_B", - [RS_COLUMN_SISO_ANT_A_SGI] = "SISO_ANT_A_SGI", - [RS_COLUMN_SISO_ANT_B_SGI] = "SISO_ANT_B_SGI", - [RS_COLUMN_MIMO2] = "MIMO2", - [RS_COLUMN_MIMO2_SGI] = "MIMO2_SGI", - }; - - static const char * const rate_name[] = { - [IWL_RATE_1M_INDEX] = "1M", - [IWL_RATE_2M_INDEX] = "2M", - [IWL_RATE_5M_INDEX] = "5.5M", - [IWL_RATE_11M_INDEX] = "11M", - [IWL_RATE_6M_INDEX] = "6M|MCS0", - [IWL_RATE_9M_INDEX] = "9M", - [IWL_RATE_12M_INDEX] = "12M|MCS1", - [IWL_RATE_18M_INDEX] = "18M|MCS2", - [IWL_RATE_24M_INDEX] = "24M|MCS3", - [IWL_RATE_36M_INDEX] = "36M|MCS4", - [IWL_RATE_48M_INDEX] = "48M|MCS5", - [IWL_RATE_54M_INDEX] = "54M|MCS6", - [IWL_RATE_MCS_7_INDEX] = "MCS7", - [IWL_RATE_MCS_8_INDEX] = "MCS8", - [IWL_RATE_MCS_9_INDEX] = "MCS9", - }; - - char *buff, *pos, *endpos; - int col, rate; - ssize_t ret; - struct iwl_lq_sta *lq_sta = file->private_data; - struct rs_rate_stats *stats; - static const size_t bufsz = 1024; - - buff = kmalloc(bufsz, GFP_KERNEL); - if (!buff) - return -ENOMEM; - - pos = buff; - endpos = pos + bufsz; - - pos += scnprintf(pos, endpos - pos, "COLUMN,"); - for (rate = 0; rate < IWL_RATE_COUNT; rate++) - pos += scnprintf(pos, endpos - pos, "%s,", rate_name[rate]); - pos += scnprintf(pos, endpos - pos, "\n"); - - for (col = 0; col < RS_COLUMN_COUNT; col++) { - pos += scnprintf(pos, endpos - pos, - "%s,", column_name[col]); - - for (rate = 0; rate < IWL_RATE_COUNT; rate++) { - stats = &(lq_sta->pers.tx_stats[col][rate]); - pos += scnprintf(pos, endpos - pos, - "%llu/%llu,", - stats->success, - stats->total); - } - pos += scnprintf(pos, endpos - pos, "\n"); - } - - ret = simple_read_from_buffer(user_buf, count, ppos, buff, pos - buff); - kfree(buff); - return ret; -} - -static ssize_t rs_sta_dbgfs_drv_tx_stats_write(struct file *file, - const char __user *user_buf, - size_t count, loff_t *ppos) -{ - struct iwl_lq_sta *lq_sta = file->private_data; - memset(lq_sta->pers.tx_stats, 0, sizeof(lq_sta->pers.tx_stats)); - - return count; -} - -static const struct file_operations rs_sta_dbgfs_drv_tx_stats_ops = { - .read = rs_sta_dbgfs_drv_tx_stats_read, - .write = rs_sta_dbgfs_drv_tx_stats_write, - .open = simple_open, - .llseek = default_llseek, -}; - -static ssize_t iwl_dbgfs_ss_force_read(struct file *file, - char __user *user_buf, - size_t count, loff_t *ppos) -{ - struct iwl_lq_sta *lq_sta = file->private_data; - char buf[12]; - int bufsz = sizeof(buf); - int pos = 0; - static const char * const ss_force_name[] = { - [RS_SS_FORCE_NONE] = "none", - [RS_SS_FORCE_STBC] = "stbc", - [RS_SS_FORCE_BFER] = "bfer", - [RS_SS_FORCE_SISO] = "siso", - }; - - pos += scnprintf(buf+pos, bufsz-pos, "%s\n", - ss_force_name[lq_sta->pers.ss_force]); - return simple_read_from_buffer(user_buf, count, ppos, buf, pos); -} - -static ssize_t iwl_dbgfs_ss_force_write(struct iwl_lq_sta *lq_sta, char *buf, - size_t count, loff_t *ppos) -{ - struct iwl_mvm *mvm = lq_sta->pers.drv; - int ret = 0; - - if (!strncmp("none", buf, 4)) { - lq_sta->pers.ss_force = RS_SS_FORCE_NONE; - } else if (!strncmp("siso", buf, 4)) { - lq_sta->pers.ss_force = RS_SS_FORCE_SISO; - } else if (!strncmp("stbc", buf, 4)) { - if (lq_sta->stbc_capable) { - lq_sta->pers.ss_force = RS_SS_FORCE_STBC; - } else { - IWL_ERR(mvm, - "can't force STBC. peer doesn't support\n"); - ret = -EINVAL; - } - } else if (!strncmp("bfer", buf, 4)) { - if (lq_sta->bfer_capable) { - lq_sta->pers.ss_force = RS_SS_FORCE_BFER; - } else { - IWL_ERR(mvm, - "can't force BFER. peer doesn't support\n"); - ret = -EINVAL; - } - } else { - IWL_ERR(mvm, "valid values none|siso|stbc|bfer\n"); - ret = -EINVAL; - } - return ret ?: count; -} - -#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \ - _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_lq_sta) -#define MVM_DEBUGFS_ADD_FILE_RS(name, parent, mode) do { \ - if (!debugfs_create_file(#name, mode, parent, lq_sta, \ - &iwl_dbgfs_##name##_ops)) \ - goto err; \ - } while (0) - -MVM_DEBUGFS_READ_WRITE_FILE_OPS(ss_force, 32); - -static void rs_add_debugfs(void *mvm, void *priv_sta, struct dentry *dir) -{ - struct iwl_lq_sta *lq_sta = priv_sta; - struct iwl_mvm_sta *mvmsta; - - mvmsta = container_of(lq_sta, struct iwl_mvm_sta, lq_sta); - - if (!mvmsta->vif) - return; - - debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, - lq_sta, &rs_sta_dbgfs_scale_table_ops); - debugfs_create_file("rate_stats_table", S_IRUSR, dir, - lq_sta, &rs_sta_dbgfs_stats_table_ops); - debugfs_create_file("drv_tx_stats", S_IRUSR | S_IWUSR, dir, - lq_sta, &rs_sta_dbgfs_drv_tx_stats_ops); - debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, - &lq_sta->tx_agg_tid_en); - debugfs_create_u8("reduced_tpc", S_IRUSR | S_IWUSR, dir, - &lq_sta->pers.dbg_fixed_txp_reduction); - - MVM_DEBUGFS_ADD_FILE_RS(ss_force, dir, S_IRUSR | S_IWUSR); - return; -err: - IWL_ERR((struct iwl_mvm *)mvm, "Can't create debugfs entity\n"); -} - -static void rs_remove_debugfs(void *mvm, void *mvm_sta) -{ -} -#endif - -/* - * Initialization of rate scaling information is done by driver after - * the station is added. Since mac80211 calls this function before a - * station is added we ignore it. - */ -static void rs_rate_init_stub(void *mvm_r, - struct ieee80211_supported_band *sband, - struct cfg80211_chan_def *chandef, - struct ieee80211_sta *sta, void *mvm_sta) -{ -} - -static const struct rate_control_ops rs_mvm_ops = { - .name = RS_NAME, - .tx_status = rs_mac80211_tx_status, - .get_rate = rs_get_rate, - .rate_init = rs_rate_init_stub, - .alloc = rs_alloc, - .free = rs_free, - .alloc_sta = rs_alloc_sta, - .free_sta = rs_free_sta, - .rate_update = rs_rate_update, -#ifdef CONFIG_MAC80211_DEBUGFS - .add_sta_debugfs = rs_add_debugfs, - .remove_sta_debugfs = rs_remove_debugfs, -#endif -}; - -int iwl_mvm_rate_control_register(void) -{ - return ieee80211_rate_control_register(&rs_mvm_ops); -} - -void iwl_mvm_rate_control_unregister(void) -{ - ieee80211_rate_control_unregister(&rs_mvm_ops); -} - -/** - * iwl_mvm_tx_protection - Gets LQ command, change it to enable/disable - * Tx protection, according to this request and previous requests, - * and send the LQ command. - * @mvmsta: The station - * @enable: Enable Tx protection? - */ -int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, - bool enable) -{ - struct iwl_lq_cmd *lq = &mvmsta->lq_sta.lq; - - lockdep_assert_held(&mvm->mutex); - - if (enable) { - if (mvmsta->tx_protection == 0) - lq->flags |= LQ_FLAG_USE_RTS_MSK; - mvmsta->tx_protection++; - } else { - mvmsta->tx_protection--; - if (mvmsta->tx_protection == 0) - lq->flags &= ~LQ_FLAG_USE_RTS_MSK; - } - - return iwl_mvm_send_lq_cmd(mvm, lq, false); -} |