+++ /dev/null
-/******************************************************************************
- *
- * 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);
-}
projects / cascardo / linux.git / blobdiff