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2799 lines
78 KiB
2799 lines
78 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/****************************************************************************** |
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* |
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* Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved. |
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* |
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* Contact Information: |
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* Intel Linux Wireless <[email protected]> |
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
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* |
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*****************************************************************************/ |
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#include <linux/kernel.h> |
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#include <linux/skbuff.h> |
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#include <linux/slab.h> |
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#include <net/mac80211.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/delay.h> |
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#include <linux/workqueue.h> |
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#include "common.h" |
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#include "4965.h" |
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#define IL4965_RS_NAME "iwl-4965-rs" |
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#define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
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#define IL_NUMBER_TRY 1 |
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#define IL_HT_NUMBER_TRY 3 |
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#define RATE_MAX_WINDOW 62 /* # tx in history win */ |
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#define RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ |
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#define RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ |
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|
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/* max allowed rate miss before sync LQ cmd */ |
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#define IL_MISSED_RATE_MAX 15 |
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/* max time to accum history 2 seconds */ |
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#define RATE_SCALE_FLUSH_INTVL (3*HZ) |
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static u8 rs_ht_to_legacy[] = { |
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RATE_6M_IDX, RATE_6M_IDX, |
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RATE_6M_IDX, RATE_6M_IDX, |
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RATE_6M_IDX, |
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RATE_6M_IDX, RATE_9M_IDX, |
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RATE_12M_IDX, RATE_18M_IDX, |
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RATE_24M_IDX, RATE_36M_IDX, |
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RATE_48M_IDX, RATE_54M_IDX |
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}; |
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|
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static const u8 ant_toggle_lookup[] = { |
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/*ANT_NONE -> */ ANT_NONE, |
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/*ANT_A -> */ ANT_B, |
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/*ANT_B -> */ ANT_C, |
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/*ANT_AB -> */ ANT_BC, |
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/*ANT_C -> */ ANT_A, |
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/*ANT_AC -> */ ANT_AB, |
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/*ANT_BC -> */ ANT_AC, |
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/*ANT_ABC -> */ ANT_ABC, |
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}; |
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#define IL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \ |
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[RATE_##r##M_IDX] = { RATE_##r##M_PLCP, \ |
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RATE_SISO_##s##M_PLCP, \ |
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RATE_MIMO2_##s##M_PLCP,\ |
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RATE_##r##M_IEEE, \ |
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RATE_##ip##M_IDX, \ |
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RATE_##in##M_IDX, \ |
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RATE_##rp##M_IDX, \ |
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RATE_##rn##M_IDX, \ |
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RATE_##pp##M_IDX, \ |
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RATE_##np##M_IDX } |
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/* |
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* Parameter order: |
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* rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate |
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* |
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* If there isn't a valid next or previous rate then INV is used which |
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* maps to RATE_INVALID |
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* |
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*/ |
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const struct il_rate_info il_rates[RATE_COUNT] = { |
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IL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */ |
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IL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */ |
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IL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */ |
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IL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */ |
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IL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */ |
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IL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */ |
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IL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */ |
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IL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */ |
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IL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */ |
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IL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */ |
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IL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */ |
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IL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */ |
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IL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */ |
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}; |
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static int |
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il4965_hwrate_to_plcp_idx(u32 rate_n_flags) |
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{ |
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int idx = 0; |
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|
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/* HT rate format */ |
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if (rate_n_flags & RATE_MCS_HT_MSK) { |
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idx = (rate_n_flags & 0xff); |
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|
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if (idx >= RATE_MIMO2_6M_PLCP) |
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idx = idx - RATE_MIMO2_6M_PLCP; |
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idx += IL_FIRST_OFDM_RATE; |
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/* skip 9M not supported in ht */ |
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if (idx >= RATE_9M_IDX) |
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idx += 1; |
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if (idx >= IL_FIRST_OFDM_RATE && idx <= IL_LAST_OFDM_RATE) |
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return idx; |
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|
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/* legacy rate format, search for match in table */ |
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} else { |
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for (idx = 0; idx < ARRAY_SIZE(il_rates); idx++) |
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if (il_rates[idx].plcp == (rate_n_flags & 0xFF)) |
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return idx; |
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} |
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return -1; |
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} |
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static void il4965_rs_rate_scale_perform(struct il_priv *il, |
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struct sk_buff *skb, |
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struct ieee80211_sta *sta, |
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struct il_lq_sta *lq_sta); |
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static void il4965_rs_fill_link_cmd(struct il_priv *il, |
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struct il_lq_sta *lq_sta, u32 rate_n_flags); |
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static void il4965_rs_stay_in_table(struct il_lq_sta *lq_sta, |
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bool force_search); |
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#ifdef CONFIG_MAC80211_DEBUGFS |
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static void il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, |
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u32 *rate_n_flags, int idx); |
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#else |
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static void |
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il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, u32 * rate_n_flags, int idx) |
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{ |
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} |
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#endif |
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/* |
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* The following tables contain the expected throughput metrics for all rates |
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* |
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* 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits |
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* |
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* where invalid entries are zeros. |
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* |
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* CCK rates are only valid in legacy table and will only be used in G |
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* (2.4 GHz) band. |
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*/ |
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|
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static s32 expected_tpt_legacy[RATE_COUNT] = { |
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7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0 |
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}; |
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static s32 expected_tpt_siso20MHz[4][RATE_COUNT] = { |
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{0, 0, 0, 0, 42, 0, 76, 102, 124, 158, 183, 193, 202}, /* Norm */ |
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{0, 0, 0, 0, 46, 0, 82, 110, 132, 167, 192, 202, 210}, /* SGI */ |
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{0, 0, 0, 0, 48, 0, 93, 135, 176, 251, 319, 351, 381}, /* AGG */ |
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{0, 0, 0, 0, 53, 0, 102, 149, 193, 275, 348, 381, 413}, /* AGG+SGI */ |
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}; |
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static s32 expected_tpt_siso40MHz[4][RATE_COUNT] = { |
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{0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */ |
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{0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */ |
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{0, 0, 0, 0, 96, 0, 182, 259, 328, 451, 553, 598, 640}, /* AGG */ |
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{0, 0, 0, 0, 106, 0, 199, 282, 357, 487, 593, 640, 683}, /* AGG+SGI */ |
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}; |
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static s32 expected_tpt_mimo2_20MHz[4][RATE_COUNT] = { |
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{0, 0, 0, 0, 74, 0, 123, 155, 179, 213, 235, 243, 250}, /* Norm */ |
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{0, 0, 0, 0, 81, 0, 131, 164, 187, 221, 242, 250, 256}, /* SGI */ |
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{0, 0, 0, 0, 92, 0, 175, 250, 317, 436, 534, 578, 619}, /* AGG */ |
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{0, 0, 0, 0, 102, 0, 192, 273, 344, 470, 573, 619, 660}, /* AGG+SGI */ |
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}; |
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static s32 expected_tpt_mimo2_40MHz[4][RATE_COUNT] = { |
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{0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */ |
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{0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */ |
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{0, 0, 0, 0, 180, 0, 327, 446, 545, 708, 828, 878, 922}, /* AGG */ |
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{0, 0, 0, 0, 197, 0, 355, 481, 584, 752, 872, 922, 966}, /* AGG+SGI */ |
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}; |
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/* mbps, mcs */ |
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static const struct il_rate_mcs_info il_rate_mcs[RATE_COUNT] = { |
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{"1", "BPSK DSSS"}, |
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{"2", "QPSK DSSS"}, |
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{"5.5", "BPSK CCK"}, |
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{"11", "QPSK CCK"}, |
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{"6", "BPSK 1/2"}, |
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{"9", "BPSK 1/2"}, |
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{"12", "QPSK 1/2"}, |
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{"18", "QPSK 3/4"}, |
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{"24", "16QAM 1/2"}, |
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{"36", "16QAM 3/4"}, |
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{"48", "64QAM 2/3"}, |
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{"54", "64QAM 3/4"}, |
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{"60", "64QAM 5/6"}, |
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}; |
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#define MCS_IDX_PER_STREAM (8) |
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static inline u8 |
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il4965_rs_extract_rate(u32 rate_n_flags) |
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{ |
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return (u8) (rate_n_flags & 0xFF); |
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} |
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static void |
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il4965_rs_rate_scale_clear_win(struct il_rate_scale_data *win) |
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{ |
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win->data = 0; |
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win->success_counter = 0; |
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win->success_ratio = IL_INVALID_VALUE; |
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win->counter = 0; |
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win->average_tpt = IL_INVALID_VALUE; |
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win->stamp = 0; |
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} |
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static inline u8 |
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il4965_rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
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{ |
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return (ant_type & valid_antenna) == ant_type; |
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} |
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/* |
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* removes the old data from the stats. All data that is older than |
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* TID_MAX_TIME_DIFF, will be deleted. |
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*/ |
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static void |
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il4965_rs_tl_rm_old_stats(struct il_traffic_load *tl, u32 curr_time) |
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{ |
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/* The oldest age we want to keep */ |
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u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; |
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while (tl->queue_count && tl->time_stamp < oldest_time) { |
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tl->total -= tl->packet_count[tl->head]; |
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tl->packet_count[tl->head] = 0; |
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tl->time_stamp += TID_QUEUE_CELL_SPACING; |
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tl->queue_count--; |
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tl->head++; |
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if (tl->head >= TID_QUEUE_MAX_SIZE) |
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tl->head = 0; |
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} |
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} |
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/* |
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* increment traffic load value for tid and also remove |
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* any old values if passed the certain time period |
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*/ |
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static u8 |
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il4965_rs_tl_add_packet(struct il_lq_sta *lq_data, struct ieee80211_hdr *hdr) |
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{ |
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u32 curr_time = jiffies_to_msecs(jiffies); |
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u32 time_diff; |
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s32 idx; |
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struct il_traffic_load *tl = NULL; |
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u8 tid; |
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if (ieee80211_is_data_qos(hdr->frame_control)) { |
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u8 *qc = ieee80211_get_qos_ctl(hdr); |
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tid = qc[0] & 0xf; |
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} else |
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return MAX_TID_COUNT; |
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if (unlikely(tid >= TID_MAX_LOAD_COUNT)) |
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return MAX_TID_COUNT; |
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tl = &lq_data->load[tid]; |
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curr_time -= curr_time % TID_ROUND_VALUE; |
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/* Happens only for the first packet. Initialize the data */ |
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if (!(tl->queue_count)) { |
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tl->total = 1; |
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tl->time_stamp = curr_time; |
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tl->queue_count = 1; |
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tl->head = 0; |
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tl->packet_count[0] = 1; |
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return MAX_TID_COUNT; |
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} |
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time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); |
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idx = time_diff / TID_QUEUE_CELL_SPACING; |
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/* The history is too long: remove data that is older than */ |
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/* TID_MAX_TIME_DIFF */ |
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if (idx >= TID_QUEUE_MAX_SIZE) |
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il4965_rs_tl_rm_old_stats(tl, curr_time); |
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idx = (tl->head + idx) % TID_QUEUE_MAX_SIZE; |
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tl->packet_count[idx] = tl->packet_count[idx] + 1; |
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tl->total = tl->total + 1; |
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if ((idx + 1) > tl->queue_count) |
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tl->queue_count = idx + 1; |
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return tid; |
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} |
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/* |
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get the traffic load value for tid |
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*/ |
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static u32 |
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il4965_rs_tl_get_load(struct il_lq_sta *lq_data, u8 tid) |
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{ |
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u32 curr_time = jiffies_to_msecs(jiffies); |
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u32 time_diff; |
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s32 idx; |
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struct il_traffic_load *tl = NULL; |
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if (tid >= TID_MAX_LOAD_COUNT) |
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return 0; |
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tl = &(lq_data->load[tid]); |
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curr_time -= curr_time % TID_ROUND_VALUE; |
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if (!(tl->queue_count)) |
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return 0; |
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time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); |
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idx = time_diff / TID_QUEUE_CELL_SPACING; |
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/* The history is too long: remove data that is older than */ |
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/* TID_MAX_TIME_DIFF */ |
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if (idx >= TID_QUEUE_MAX_SIZE) |
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il4965_rs_tl_rm_old_stats(tl, curr_time); |
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return tl->total; |
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} |
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static int |
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il4965_rs_tl_turn_on_agg_for_tid(struct il_priv *il, struct il_lq_sta *lq_data, |
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u8 tid, struct ieee80211_sta *sta) |
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{ |
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int ret = -EAGAIN; |
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u32 load; |
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load = il4965_rs_tl_get_load(lq_data, tid); |
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if (load > IL_AGG_LOAD_THRESHOLD) { |
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D_HT("Starting Tx agg: STA: %pM tid: %d\n", sta->addr, tid); |
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ret = ieee80211_start_tx_ba_session(sta, tid, 5000); |
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if (ret == -EAGAIN) { |
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/* |
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* driver and mac80211 is out of sync |
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* this might be cause by reloading firmware |
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* stop the tx ba session here |
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*/ |
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IL_ERR("Fail start Tx agg on tid: %d\n", tid); |
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ieee80211_stop_tx_ba_session(sta, tid); |
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} |
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} else |
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D_HT("Aggregation not enabled for tid %d because load = %u\n", |
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tid, load); |
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return ret; |
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} |
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static void |
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il4965_rs_tl_turn_on_agg(struct il_priv *il, u8 tid, struct il_lq_sta *lq_data, |
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struct ieee80211_sta *sta) |
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{ |
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if (tid < TID_MAX_LOAD_COUNT) |
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il4965_rs_tl_turn_on_agg_for_tid(il, lq_data, tid, sta); |
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else |
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IL_ERR("tid exceeds max load count: %d/%d\n", tid, |
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TID_MAX_LOAD_COUNT); |
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} |
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static inline int |
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il4965_get_il4965_num_of_ant_from_rate(u32 rate_n_flags) |
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{ |
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return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
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!!(rate_n_flags & RATE_MCS_ANT_B_MSK) + |
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!!(rate_n_flags & RATE_MCS_ANT_C_MSK); |
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} |
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|
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/* |
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* Static function to get the expected throughput from an il_scale_tbl_info |
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* that wraps a NULL pointer check |
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*/ |
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static s32 |
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il4965_get_expected_tpt(struct il_scale_tbl_info *tbl, int rs_idx) |
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{ |
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if (tbl->expected_tpt) |
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return tbl->expected_tpt[rs_idx]; |
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return 0; |
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} |
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|
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/* |
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* il4965_rs_collect_tx_data - Update the success/failure sliding win |
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* |
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* We keep a sliding win of the last 62 packets transmitted |
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* at this rate. win->data contains the bitmask of successful |
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* packets. |
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*/ |
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static int |
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il4965_rs_collect_tx_data(struct il_scale_tbl_info *tbl, int scale_idx, |
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int attempts, int successes) |
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{ |
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struct il_rate_scale_data *win = NULL; |
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static const u64 mask = (((u64) 1) << (RATE_MAX_WINDOW - 1)); |
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s32 fail_count, tpt; |
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|
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if (scale_idx < 0 || scale_idx >= RATE_COUNT) |
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return -EINVAL; |
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|
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/* Select win for current tx bit rate */ |
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win = &(tbl->win[scale_idx]); |
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|
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/* Get expected throughput */ |
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tpt = il4965_get_expected_tpt(tbl, scale_idx); |
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|
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/* |
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* Keep track of only the latest 62 tx frame attempts in this rate's |
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* history win; anything older isn't really relevant any more. |
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* If we have filled up the sliding win, drop the oldest attempt; |
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* if the oldest attempt (highest bit in bitmap) shows "success", |
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* subtract "1" from the success counter (this is the main reason |
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* we keep these bitmaps!). |
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*/ |
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while (attempts > 0) { |
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if (win->counter >= RATE_MAX_WINDOW) { |
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|
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/* remove earliest */ |
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win->counter = RATE_MAX_WINDOW - 1; |
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|
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if (win->data & mask) { |
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win->data &= ~mask; |
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win->success_counter--; |
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} |
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} |
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|
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/* Increment frames-attempted counter */ |
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win->counter++; |
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|
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/* Shift bitmap by one frame to throw away oldest history */ |
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win->data <<= 1; |
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|
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/* Mark the most recent #successes attempts as successful */ |
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if (successes > 0) { |
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win->success_counter++; |
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win->data |= 0x1; |
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successes--; |
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} |
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|
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attempts--; |
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} |
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|
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/* Calculate current success ratio, avoid divide-by-0! */ |
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if (win->counter > 0) |
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win->success_ratio = |
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128 * (100 * win->success_counter) / win->counter; |
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else |
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win->success_ratio = IL_INVALID_VALUE; |
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|
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fail_count = win->counter - win->success_counter; |
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|
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/* Calculate average throughput, if we have enough history. */ |
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if (fail_count >= RATE_MIN_FAILURE_TH || |
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win->success_counter >= RATE_MIN_SUCCESS_TH) |
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win->average_tpt = (win->success_ratio * tpt + 64) / 128; |
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else |
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win->average_tpt = IL_INVALID_VALUE; |
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|
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/* Tag this win as having been updated */ |
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win->stamp = jiffies; |
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|
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return 0; |
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} |
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|
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/* |
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* Fill uCode API rate_n_flags field, based on "search" or "active" table. |
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*/ |
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static u32 |
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il4965_rate_n_flags_from_tbl(struct il_priv *il, struct il_scale_tbl_info *tbl, |
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int idx, u8 use_green) |
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{ |
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u32 rate_n_flags = 0; |
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|
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if (is_legacy(tbl->lq_type)) { |
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rate_n_flags = il_rates[idx].plcp; |
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if (idx >= IL_FIRST_CCK_RATE && idx <= IL_LAST_CCK_RATE) |
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rate_n_flags |= RATE_MCS_CCK_MSK; |
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|
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} else if (is_Ht(tbl->lq_type)) { |
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if (idx > IL_LAST_OFDM_RATE) { |
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IL_ERR("Invalid HT rate idx %d\n", idx); |
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idx = IL_LAST_OFDM_RATE; |
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} |
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rate_n_flags = RATE_MCS_HT_MSK; |
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|
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if (is_siso(tbl->lq_type)) |
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rate_n_flags |= il_rates[idx].plcp_siso; |
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else |
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rate_n_flags |= il_rates[idx].plcp_mimo2; |
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} else { |
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IL_ERR("Invalid tbl->lq_type %d\n", tbl->lq_type); |
|
} |
|
|
|
rate_n_flags |= |
|
((tbl->ant_type << RATE_MCS_ANT_POS) & RATE_MCS_ANT_ABC_MSK); |
|
|
|
if (is_Ht(tbl->lq_type)) { |
|
if (tbl->is_ht40) { |
|
if (tbl->is_dup) |
|
rate_n_flags |= RATE_MCS_DUP_MSK; |
|
else |
|
rate_n_flags |= RATE_MCS_HT40_MSK; |
|
} |
|
if (tbl->is_SGI) |
|
rate_n_flags |= RATE_MCS_SGI_MSK; |
|
|
|
if (use_green) { |
|
rate_n_flags |= RATE_MCS_GF_MSK; |
|
if (is_siso(tbl->lq_type) && tbl->is_SGI) { |
|
rate_n_flags &= ~RATE_MCS_SGI_MSK; |
|
IL_ERR("GF was set with SGI:SISO\n"); |
|
} |
|
} |
|
} |
|
return rate_n_flags; |
|
} |
|
|
|
/* |
|
* Interpret uCode API's rate_n_flags format, |
|
* fill "search" or "active" tx mode table. |
|
*/ |
|
static int |
|
il4965_rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
|
enum nl80211_band band, |
|
struct il_scale_tbl_info *tbl, int *rate_idx) |
|
{ |
|
u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
|
u8 il4965_num_of_ant = |
|
il4965_get_il4965_num_of_ant_from_rate(rate_n_flags); |
|
u8 mcs; |
|
|
|
memset(tbl, 0, sizeof(struct il_scale_tbl_info)); |
|
*rate_idx = il4965_hwrate_to_plcp_idx(rate_n_flags); |
|
|
|
if (*rate_idx == RATE_INVALID) { |
|
*rate_idx = -1; |
|
return -EINVAL; |
|
} |
|
tbl->is_SGI = 0; /* default legacy setup */ |
|
tbl->is_ht40 = 0; |
|
tbl->is_dup = 0; |
|
tbl->ant_type = (ant_msk >> RATE_MCS_ANT_POS); |
|
tbl->lq_type = LQ_NONE; |
|
tbl->max_search = IL_MAX_SEARCH; |
|
|
|
/* legacy rate format */ |
|
if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
|
if (il4965_num_of_ant == 1) { |
|
if (band == NL80211_BAND_5GHZ) |
|
tbl->lq_type = LQ_A; |
|
else |
|
tbl->lq_type = LQ_G; |
|
} |
|
/* HT rate format */ |
|
} else { |
|
if (rate_n_flags & RATE_MCS_SGI_MSK) |
|
tbl->is_SGI = 1; |
|
|
|
if ((rate_n_flags & RATE_MCS_HT40_MSK) || |
|
(rate_n_flags & RATE_MCS_DUP_MSK)) |
|
tbl->is_ht40 = 1; |
|
|
|
if (rate_n_flags & RATE_MCS_DUP_MSK) |
|
tbl->is_dup = 1; |
|
|
|
mcs = il4965_rs_extract_rate(rate_n_flags); |
|
|
|
/* SISO */ |
|
if (mcs <= RATE_SISO_60M_PLCP) { |
|
if (il4965_num_of_ant == 1) |
|
tbl->lq_type = LQ_SISO; /*else NONE */ |
|
/* MIMO2 */ |
|
} else { |
|
if (il4965_num_of_ant == 2) |
|
tbl->lq_type = LQ_MIMO2; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
/* switch to another antenna/antennas and return 1 */ |
|
/* if no other valid antenna found, return 0 */ |
|
static int |
|
il4965_rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, |
|
struct il_scale_tbl_info *tbl) |
|
{ |
|
u8 new_ant_type; |
|
|
|
if (!tbl->ant_type || tbl->ant_type > ANT_ABC) |
|
return 0; |
|
|
|
if (!il4965_rs_is_valid_ant(valid_ant, tbl->ant_type)) |
|
return 0; |
|
|
|
new_ant_type = ant_toggle_lookup[tbl->ant_type]; |
|
|
|
while (new_ant_type != tbl->ant_type && |
|
!il4965_rs_is_valid_ant(valid_ant, new_ant_type)) |
|
new_ant_type = ant_toggle_lookup[new_ant_type]; |
|
|
|
if (new_ant_type == tbl->ant_type) |
|
return 0; |
|
|
|
tbl->ant_type = new_ant_type; |
|
*rate_n_flags &= ~RATE_MCS_ANT_ABC_MSK; |
|
*rate_n_flags |= new_ant_type << RATE_MCS_ANT_POS; |
|
return 1; |
|
} |
|
|
|
/* |
|
* Green-field mode is valid if the station supports it and |
|
* there are no non-GF stations present in the BSS. |
|
*/ |
|
static bool |
|
il4965_rs_use_green(struct il_priv *il, struct ieee80211_sta *sta) |
|
{ |
|
return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && |
|
!il->ht.non_gf_sta_present; |
|
} |
|
|
|
/* |
|
* il4965_rs_get_supported_rates - get the available rates |
|
* |
|
* if management frame or broadcast frame only return |
|
* basic available rates. |
|
* |
|
*/ |
|
static u16 |
|
il4965_rs_get_supported_rates(struct il_lq_sta *lq_sta, |
|
struct ieee80211_hdr *hdr, |
|
enum il_table_type rate_type) |
|
{ |
|
if (is_legacy(rate_type)) { |
|
return lq_sta->active_legacy_rate; |
|
} else { |
|
if (is_siso(rate_type)) |
|
return lq_sta->active_siso_rate; |
|
else |
|
return lq_sta->active_mimo2_rate; |
|
} |
|
} |
|
|
|
static u16 |
|
il4965_rs_get_adjacent_rate(struct il_priv *il, u8 idx, u16 rate_mask, |
|
int rate_type) |
|
{ |
|
u8 high = RATE_INVALID; |
|
u8 low = RATE_INVALID; |
|
|
|
/* 802.11A or ht walks to the next literal adjacent rate in |
|
* the rate table */ |
|
if (is_a_band(rate_type) || !is_legacy(rate_type)) { |
|
int i; |
|
u32 mask; |
|
|
|
/* Find the previous rate that is in the rate mask */ |
|
i = idx - 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 = idx + 1; |
|
for (mask = (1 << i); i < RATE_COUNT; i++, mask <<= 1) { |
|
if (rate_mask & mask) { |
|
high = i; |
|
break; |
|
} |
|
} |
|
|
|
return (high << 8) | low; |
|
} |
|
|
|
low = idx; |
|
while (low != RATE_INVALID) { |
|
low = il_rates[low].prev_rs; |
|
if (low == RATE_INVALID) |
|
break; |
|
if (rate_mask & (1 << low)) |
|
break; |
|
D_RATE("Skipping masked lower rate: %d\n", low); |
|
} |
|
|
|
high = idx; |
|
while (high != RATE_INVALID) { |
|
high = il_rates[high].next_rs; |
|
if (high == RATE_INVALID) |
|
break; |
|
if (rate_mask & (1 << high)) |
|
break; |
|
D_RATE("Skipping masked higher rate: %d\n", high); |
|
} |
|
|
|
return (high << 8) | low; |
|
} |
|
|
|
static u32 |
|
il4965_rs_get_lower_rate(struct il_lq_sta *lq_sta, |
|
struct il_scale_tbl_info *tbl, u8 scale_idx, |
|
u8 ht_possible) |
|
{ |
|
s32 low; |
|
u16 rate_mask; |
|
u16 high_low; |
|
u8 switch_to_legacy = 0; |
|
u8 is_green = lq_sta->is_green; |
|
struct il_priv *il = lq_sta->drv; |
|
|
|
/* check if we need to switch from HT to legacy rates. |
|
* assumption is that mandatory rates (1Mbps or 6Mbps) |
|
* are always supported (spec demand) */ |
|
if (!is_legacy(tbl->lq_type) && (!ht_possible || !scale_idx)) { |
|
switch_to_legacy = 1; |
|
scale_idx = rs_ht_to_legacy[scale_idx]; |
|
if (lq_sta->band == NL80211_BAND_5GHZ) |
|
tbl->lq_type = LQ_A; |
|
else |
|
tbl->lq_type = LQ_G; |
|
|
|
if (il4965_num_of_ant(tbl->ant_type) > 1) |
|
tbl->ant_type = |
|
il4965_first_antenna(il->hw_params.valid_tx_ant); |
|
|
|
tbl->is_ht40 = 0; |
|
tbl->is_SGI = 0; |
|
tbl->max_search = IL_MAX_SEARCH; |
|
} |
|
|
|
rate_mask = il4965_rs_get_supported_rates(lq_sta, NULL, tbl->lq_type); |
|
|
|
/* Mask with station rate restriction */ |
|
if (is_legacy(tbl->lq_type)) { |
|
/* supp_rates has no CCK bits in A mode */ |
|
if (lq_sta->band == NL80211_BAND_5GHZ) |
|
rate_mask = |
|
(u16) (rate_mask & |
|
(lq_sta->supp_rates << IL_FIRST_OFDM_RATE)); |
|
else |
|
rate_mask = (u16) (rate_mask & lq_sta->supp_rates); |
|
} |
|
|
|
/* If we switched from HT to legacy, check current rate */ |
|
if (switch_to_legacy && (rate_mask & (1 << scale_idx))) { |
|
low = scale_idx; |
|
goto out; |
|
} |
|
|
|
high_low = |
|
il4965_rs_get_adjacent_rate(lq_sta->drv, scale_idx, rate_mask, |
|
tbl->lq_type); |
|
low = high_low & 0xff; |
|
|
|
if (low == RATE_INVALID) |
|
low = scale_idx; |
|
|
|
out: |
|
return il4965_rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
|
} |
|
|
|
/* |
|
* Simple function to compare two rate scale table types |
|
*/ |
|
static bool |
|
il4965_table_type_matches(struct il_scale_tbl_info *a, |
|
struct il_scale_tbl_info *b) |
|
{ |
|
return (a->lq_type == b->lq_type && a->ant_type == b->ant_type && |
|
a->is_SGI == b->is_SGI); |
|
} |
|
|
|
/* |
|
* mac80211 sends us Tx status |
|
*/ |
|
static void |
|
il4965_rs_tx_status(void *il_r, struct ieee80211_supported_band *sband, |
|
struct ieee80211_sta *sta, void *il_sta, |
|
struct sk_buff *skb) |
|
{ |
|
int legacy_success; |
|
int retries; |
|
int rs_idx, mac_idx, i; |
|
struct il_lq_sta *lq_sta = il_sta; |
|
struct il_link_quality_cmd *table; |
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
|
struct il_priv *il = (struct il_priv *)il_r; |
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
|
enum mac80211_rate_control_flags mac_flags; |
|
u32 tx_rate; |
|
struct il_scale_tbl_info tbl_type; |
|
struct il_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; |
|
|
|
D_RATE("get frame ack response, update rate scale win\n"); |
|
|
|
/* Treat uninitialized rate scaling data same as non-existing. */ |
|
if (!lq_sta) { |
|
D_RATE("Station rate scaling not created yet.\n"); |
|
return; |
|
} else if (!lq_sta->drv) { |
|
D_RATE("Rate scaling not initialized yet.\n"); |
|
return; |
|
} |
|
|
|
if (!ieee80211_is_data(hdr->frame_control) || |
|
(info->flags & IEEE80211_TX_CTL_NO_ACK)) |
|
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; |
|
|
|
/* |
|
* 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; |
|
tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
|
il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, &tbl_type, &rs_idx); |
|
if (il->band == NL80211_BAND_5GHZ) |
|
rs_idx -= IL_FIRST_OFDM_RATE; |
|
mac_flags = info->status.rates[0].flags; |
|
mac_idx = info->status.rates[0].idx; |
|
/* For HT packets, map MCS to PLCP */ |
|
if (mac_flags & IEEE80211_TX_RC_MCS) { |
|
mac_idx &= RATE_MCS_CODE_MSK; /* Remove # of streams */ |
|
if (mac_idx >= (RATE_9M_IDX - IL_FIRST_OFDM_RATE)) |
|
mac_idx++; |
|
/* |
|
* mac80211 HT idx is always zero-idxed; we need to move |
|
* HT OFDM rates after CCK rates in 2.4 GHz band |
|
*/ |
|
if (il->band == NL80211_BAND_2GHZ) |
|
mac_idx += IL_FIRST_OFDM_RATE; |
|
} |
|
/* Here we actually compare this rate to the latest LQ command */ |
|
if (mac_idx < 0 || |
|
tbl_type.is_SGI != !!(mac_flags & IEEE80211_TX_RC_SHORT_GI) || |
|
tbl_type.is_ht40 != !!(mac_flags & IEEE80211_TX_RC_40_MHZ_WIDTH) || |
|
tbl_type.is_dup != !!(mac_flags & IEEE80211_TX_RC_DUP_DATA) || |
|
tbl_type.ant_type != info->status.antenna || |
|
!!(tx_rate & RATE_MCS_HT_MSK) != !!(mac_flags & IEEE80211_TX_RC_MCS) |
|
|| !!(tx_rate & RATE_MCS_GF_MSK) != |
|
!!(mac_flags & IEEE80211_TX_RC_GREEN_FIELD) || rs_idx != mac_idx) { |
|
D_RATE("initial rate %d does not match %d (0x%x)\n", mac_idx, |
|
rs_idx, tx_rate); |
|
/* |
|
* Since rates mis-match, the last LQ command may have failed. |
|
* After IL_MISSED_RATE_MAX mis-matches, resync the uCode with |
|
* ... driver. |
|
*/ |
|
lq_sta->missed_rate_counter++; |
|
if (lq_sta->missed_rate_counter > IL_MISSED_RATE_MAX) { |
|
lq_sta->missed_rate_counter = 0; |
|
il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, 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; |
|
|
|
/* Figure out if rate scale algorithm is in active or search table */ |
|
if (il4965_table_type_matches |
|
(&tbl_type, &(lq_sta->lq_info[lq_sta->active_tbl]))) { |
|
curr_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
|
other_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
|
} else |
|
if (il4965_table_type_matches |
|
(&tbl_type, &lq_sta->lq_info[1 - lq_sta->active_tbl])) { |
|
curr_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
|
other_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
|
} else { |
|
D_RATE("Neither active nor search matches tx rate\n"); |
|
tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
|
D_RATE("active- lq:%x, ant:%x, SGI:%d\n", tmp_tbl->lq_type, |
|
tmp_tbl->ant_type, tmp_tbl->is_SGI); |
|
tmp_tbl = &(lq_sta->lq_info[1 - lq_sta->active_tbl]); |
|
D_RATE("search- lq:%x, ant:%x, SGI:%d\n", tmp_tbl->lq_type, |
|
tmp_tbl->ant_type, tmp_tbl->is_SGI); |
|
D_RATE("actual- lq:%x, ant:%x, SGI:%d\n", tbl_type.lq_type, |
|
tbl_type.ant_type, tbl_type.is_SGI); |
|
/* |
|
* no matching table found, let's by-pass the data collection |
|
* and continue to perform rate scale to find the rate table |
|
*/ |
|
il4965_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 idx into rate scale table. |
|
*/ |
|
if (info->flags & IEEE80211_TX_STAT_AMPDU) { |
|
tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
|
il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, &tbl_type, |
|
&rs_idx); |
|
il4965_rs_collect_tx_data(curr_tbl, rs_idx, |
|
info->status.ampdu_len, |
|
info->status.ampdu_ack_len); |
|
|
|
/* Update success/fail counts if not searching for new mode */ |
|
if (lq_sta->stay_in_tbl) { |
|
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) { |
|
tx_rate = le32_to_cpu(table->rs_table[i].rate_n_flags); |
|
il4965_rs_get_tbl_info_from_mcs(tx_rate, il->band, |
|
&tbl_type, &rs_idx); |
|
/* |
|
* Only collect stats if retried rate is in the same RS |
|
* table as active/search. |
|
*/ |
|
if (il4965_table_type_matches(&tbl_type, curr_tbl)) |
|
tmp_tbl = curr_tbl; |
|
else if (il4965_table_type_matches |
|
(&tbl_type, other_tbl)) |
|
tmp_tbl = other_tbl; |
|
else |
|
continue; |
|
il4965_rs_collect_tx_data(tmp_tbl, rs_idx, 1, |
|
i < |
|
retries ? 0 : legacy_success); |
|
} |
|
|
|
/* Update success/fail counts if not searching for new mode */ |
|
if (lq_sta->stay_in_tbl) { |
|
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 = tx_rate; |
|
done: |
|
/* See if there's a better rate or modulation mode to try. */ |
|
if (sta->supp_rates[sband->band]) |
|
il4965_rs_rate_scale_perform(il, skb, sta, lq_sta); |
|
} |
|
|
|
/* |
|
* 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 stats. |
|
* These control how long we stay using same modulation mode before |
|
* searching for a new mode. |
|
*/ |
|
static void |
|
il4965_rs_set_stay_in_table(struct il_priv *il, u8 is_legacy, |
|
struct il_lq_sta *lq_sta) |
|
{ |
|
D_RATE("we are staying in the same table\n"); |
|
lq_sta->stay_in_tbl = 1; /* only place this gets set */ |
|
if (is_legacy) { |
|
lq_sta->table_count_limit = IL_LEGACY_TBL_COUNT; |
|
lq_sta->max_failure_limit = IL_LEGACY_FAILURE_LIMIT; |
|
lq_sta->max_success_limit = IL_LEGACY_SUCCESS_LIMIT; |
|
} else { |
|
lq_sta->table_count_limit = IL_NONE_LEGACY_TBL_COUNT; |
|
lq_sta->max_failure_limit = IL_NONE_LEGACY_FAILURE_LIMIT; |
|
lq_sta->max_success_limit = IL_NONE_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->action_counter = 0; |
|
} |
|
|
|
/* |
|
* Find correct throughput table for given mode of modulation |
|
*/ |
|
static void |
|
il4965_rs_set_expected_tpt_table(struct il_lq_sta *lq_sta, |
|
struct il_scale_tbl_info *tbl) |
|
{ |
|
/* Used to choose among HT tables */ |
|
s32(*ht_tbl_pointer)[RATE_COUNT]; |
|
|
|
/* Check for invalid LQ type */ |
|
if (WARN_ON_ONCE(!is_legacy(tbl->lq_type) && !is_Ht(tbl->lq_type))) { |
|
tbl->expected_tpt = expected_tpt_legacy; |
|
return; |
|
} |
|
|
|
/* Legacy rates have only one table */ |
|
if (is_legacy(tbl->lq_type)) { |
|
tbl->expected_tpt = expected_tpt_legacy; |
|
return; |
|
} |
|
|
|
/* Choose among many HT tables depending on number of streams |
|
* (SISO/MIMO2), channel width (20/40), SGI, and aggregation |
|
* status */ |
|
if (is_siso(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) |
|
ht_tbl_pointer = expected_tpt_siso20MHz; |
|
else if (is_siso(tbl->lq_type)) |
|
ht_tbl_pointer = expected_tpt_siso40MHz; |
|
else if (is_mimo2(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) |
|
ht_tbl_pointer = expected_tpt_mimo2_20MHz; |
|
else /* if (is_mimo2(tbl->lq_type)) <-- must be true */ |
|
ht_tbl_pointer = expected_tpt_mimo2_40MHz; |
|
|
|
if (!tbl->is_SGI && !lq_sta->is_agg) /* Normal */ |
|
tbl->expected_tpt = ht_tbl_pointer[0]; |
|
else if (tbl->is_SGI && !lq_sta->is_agg) /* SGI */ |
|
tbl->expected_tpt = ht_tbl_pointer[1]; |
|
else if (!tbl->is_SGI && lq_sta->is_agg) /* AGG */ |
|
tbl->expected_tpt = ht_tbl_pointer[2]; |
|
else /* AGG+SGI */ |
|
tbl->expected_tpt = ht_tbl_pointer[3]; |
|
} |
|
|
|
/* |
|
* Find starting rate for new "search" high-throughput mode of modulation. |
|
* Goal is to find lowest expected rate (under perfect conditions) that is |
|
* above the current measured throughput of "active" mode, to give new mode |
|
* a fair chance to prove itself without too many challenges. |
|
* |
|
* This gets called when transitioning to more aggressive modulation |
|
* (i.e. legacy to SISO or MIMO, or SISO to MIMO), as well as less aggressive |
|
* (i.e. MIMO to SISO). When moving to MIMO, bit rate will typically need |
|
* to decrease to match "active" throughput. When moving from MIMO to SISO, |
|
* bit rate will typically need to increase, but not if performance was bad. |
|
*/ |
|
static s32 |
|
il4965_rs_get_best_rate(struct il_priv *il, struct il_lq_sta *lq_sta, |
|
struct il_scale_tbl_info *tbl, /* "search" */ |
|
u16 rate_mask, s8 idx) |
|
{ |
|
/* "active" values */ |
|
struct il_scale_tbl_info *active_tbl = |
|
&(lq_sta->lq_info[lq_sta->active_tbl]); |
|
s32 active_sr = active_tbl->win[idx].success_ratio; |
|
s32 active_tpt = active_tbl->expected_tpt[idx]; |
|
|
|
/* expected "search" throughput */ |
|
s32 *tpt_tbl = tbl->expected_tpt; |
|
|
|
s32 new_rate, high, low, start_hi; |
|
u16 high_low; |
|
s8 rate = idx; |
|
|
|
new_rate = high = low = start_hi = RATE_INVALID; |
|
|
|
for (;;) { |
|
high_low = |
|
il4965_rs_get_adjacent_rate(il, rate, rate_mask, |
|
tbl->lq_type); |
|
|
|
low = high_low & 0xff; |
|
high = (high_low >> 8) & 0xff; |
|
|
|
/* |
|
* Lower the "search" bit rate, to give new "search" mode |
|
* approximately the same throughput as "active" if: |
|
* |
|
* 1) "Active" mode has been working modestly well (but not |
|
* great), and expected "search" throughput (under perfect |
|
* conditions) at candidate rate is above the actual |
|
* measured "active" throughput (but less than expected |
|
* "active" throughput under perfect conditions). |
|
* OR |
|
* 2) "Active" mode has been working perfectly or very well |
|
* and expected "search" throughput (under perfect |
|
* conditions) at candidate rate is above expected |
|
* "active" throughput (under perfect conditions). |
|
*/ |
|
if ((100 * tpt_tbl[rate] > lq_sta->last_tpt && |
|
(active_sr > RATE_DECREASE_TH && active_sr <= RATE_HIGH_TH |
|
&& tpt_tbl[rate] <= active_tpt)) || |
|
(active_sr >= RATE_SCALE_SWITCH && |
|
tpt_tbl[rate] > active_tpt)) { |
|
|
|
/* (2nd or later pass) |
|
* If we've already tried to raise the rate, and are |
|
* now trying to lower it, use the higher rate. */ |
|
if (start_hi != RATE_INVALID) { |
|
new_rate = start_hi; |
|
break; |
|
} |
|
|
|
new_rate = rate; |
|
|
|
/* Loop again with lower rate */ |
|
if (low != RATE_INVALID) |
|
rate = low; |
|
|
|
/* Lower rate not available, use the original */ |
|
else |
|
break; |
|
|
|
/* Else try to raise the "search" rate to match "active" */ |
|
} else { |
|
/* (2nd or later pass) |
|
* If we've already tried to lower the rate, and are |
|
* now trying to raise it, use the lower rate. */ |
|
if (new_rate != RATE_INVALID) |
|
break; |
|
|
|
/* Loop again with higher rate */ |
|
else if (high != RATE_INVALID) { |
|
start_hi = high; |
|
rate = high; |
|
|
|
/* Higher rate not available, use the original */ |
|
} else { |
|
new_rate = rate; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
return new_rate; |
|
} |
|
|
|
/* |
|
* Set up search table for MIMO2 |
|
*/ |
|
static int |
|
il4965_rs_switch_to_mimo2(struct il_priv *il, struct il_lq_sta *lq_sta, |
|
struct ieee80211_conf *conf, |
|
struct ieee80211_sta *sta, |
|
struct il_scale_tbl_info *tbl, int idx) |
|
{ |
|
u16 rate_mask; |
|
s32 rate; |
|
s8 is_green = lq_sta->is_green; |
|
|
|
if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
|
return -1; |
|
|
|
if (sta->smps_mode == IEEE80211_SMPS_STATIC) |
|
return -1; |
|
|
|
/* Need both Tx chains/antennas to support MIMO */ |
|
if (il->hw_params.tx_chains_num < 2) |
|
return -1; |
|
|
|
D_RATE("LQ: try to switch to MIMO2\n"); |
|
|
|
tbl->lq_type = LQ_MIMO2; |
|
tbl->is_dup = lq_sta->is_dup; |
|
tbl->action = 0; |
|
tbl->max_search = IL_MAX_SEARCH; |
|
rate_mask = lq_sta->active_mimo2_rate; |
|
|
|
if (il_is_ht40_tx_allowed(il, &sta->ht_cap)) |
|
tbl->is_ht40 = 1; |
|
else |
|
tbl->is_ht40 = 0; |
|
|
|
il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
|
|
|
rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, idx); |
|
|
|
D_RATE("LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
|
if (rate == RATE_INVALID || !((1 << rate) & rate_mask)) { |
|
D_RATE("Can't switch with idx %d rate mask %x\n", rate, |
|
rate_mask); |
|
return -1; |
|
} |
|
tbl->current_rate = |
|
il4965_rate_n_flags_from_tbl(il, tbl, rate, is_green); |
|
|
|
D_RATE("LQ: Switch to new mcs %X idx is green %X\n", tbl->current_rate, |
|
is_green); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Set up search table for SISO |
|
*/ |
|
static int |
|
il4965_rs_switch_to_siso(struct il_priv *il, struct il_lq_sta *lq_sta, |
|
struct ieee80211_conf *conf, struct ieee80211_sta *sta, |
|
struct il_scale_tbl_info *tbl, int idx) |
|
{ |
|
u16 rate_mask; |
|
u8 is_green = lq_sta->is_green; |
|
s32 rate; |
|
|
|
if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
|
return -1; |
|
|
|
D_RATE("LQ: try to switch to SISO\n"); |
|
|
|
tbl->is_dup = lq_sta->is_dup; |
|
tbl->lq_type = LQ_SISO; |
|
tbl->action = 0; |
|
tbl->max_search = IL_MAX_SEARCH; |
|
rate_mask = lq_sta->active_siso_rate; |
|
|
|
if (il_is_ht40_tx_allowed(il, &sta->ht_cap)) |
|
tbl->is_ht40 = 1; |
|
else |
|
tbl->is_ht40 = 0; |
|
|
|
if (is_green) |
|
tbl->is_SGI = 0; /*11n spec: no SGI in SISO+Greenfield */ |
|
|
|
il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
|
rate = il4965_rs_get_best_rate(il, lq_sta, tbl, rate_mask, idx); |
|
|
|
D_RATE("LQ: get best rate %d mask %X\n", rate, rate_mask); |
|
if (rate == RATE_INVALID || !((1 << rate) & rate_mask)) { |
|
D_RATE("can not switch with idx %d rate mask %x\n", rate, |
|
rate_mask); |
|
return -1; |
|
} |
|
tbl->current_rate = |
|
il4965_rate_n_flags_from_tbl(il, tbl, rate, is_green); |
|
D_RATE("LQ: Switch to new mcs %X idx is green %X\n", tbl->current_rate, |
|
is_green); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Try to switch to new modulation mode from legacy |
|
*/ |
|
static int |
|
il4965_rs_move_legacy_other(struct il_priv *il, struct il_lq_sta *lq_sta, |
|
struct ieee80211_conf *conf, |
|
struct ieee80211_sta *sta, int idx) |
|
{ |
|
struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
|
struct il_scale_tbl_info *search_tbl = |
|
&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
|
struct il_rate_scale_data *win = &(tbl->win[idx]); |
|
u32 sz = |
|
(sizeof(struct il_scale_tbl_info) - |
|
(sizeof(struct il_rate_scale_data) * RATE_COUNT)); |
|
u8 start_action; |
|
u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
|
u8 tx_chains_num = il->hw_params.tx_chains_num; |
|
int ret = 0; |
|
u8 update_search_tbl_counter = 0; |
|
|
|
tbl->action = IL_LEGACY_SWITCH_SISO; |
|
|
|
start_action = tbl->action; |
|
for (;;) { |
|
lq_sta->action_counter++; |
|
switch (tbl->action) { |
|
case IL_LEGACY_SWITCH_ANTENNA1: |
|
case IL_LEGACY_SWITCH_ANTENNA2: |
|
D_RATE("LQ: Legacy toggle Antenna\n"); |
|
|
|
if ((tbl->action == IL_LEGACY_SWITCH_ANTENNA1 && |
|
tx_chains_num <= 1) || |
|
(tbl->action == IL_LEGACY_SWITCH_ANTENNA2 && |
|
tx_chains_num <= 2)) |
|
break; |
|
|
|
/* Don't change antenna if success has been great */ |
|
if (win->success_ratio >= IL_RS_GOOD_RATIO) |
|
break; |
|
|
|
/* Set up search table to try other antenna */ |
|
memcpy(search_tbl, tbl, sz); |
|
|
|
if (il4965_rs_toggle_antenna |
|
(valid_tx_ant, &search_tbl->current_rate, |
|
search_tbl)) { |
|
update_search_tbl_counter = 1; |
|
il4965_rs_set_expected_tpt_table(lq_sta, |
|
search_tbl); |
|
goto out; |
|
} |
|
break; |
|
case IL_LEGACY_SWITCH_SISO: |
|
D_RATE("LQ: Legacy switch to SISO\n"); |
|
|
|
/* Set up search table to try SISO */ |
|
memcpy(search_tbl, tbl, sz); |
|
search_tbl->is_SGI = 0; |
|
ret = |
|
il4965_rs_switch_to_siso(il, lq_sta, conf, sta, |
|
search_tbl, idx); |
|
if (!ret) { |
|
lq_sta->action_counter = 0; |
|
goto out; |
|
} |
|
|
|
break; |
|
case IL_LEGACY_SWITCH_MIMO2_AB: |
|
case IL_LEGACY_SWITCH_MIMO2_AC: |
|
case IL_LEGACY_SWITCH_MIMO2_BC: |
|
D_RATE("LQ: Legacy switch to MIMO2\n"); |
|
|
|
/* Set up search table to try MIMO */ |
|
memcpy(search_tbl, tbl, sz); |
|
search_tbl->is_SGI = 0; |
|
|
|
if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AB) |
|
search_tbl->ant_type = ANT_AB; |
|
else if (tbl->action == IL_LEGACY_SWITCH_MIMO2_AC) |
|
search_tbl->ant_type = ANT_AC; |
|
else |
|
search_tbl->ant_type = ANT_BC; |
|
|
|
if (!il4965_rs_is_valid_ant |
|
(valid_tx_ant, search_tbl->ant_type)) |
|
break; |
|
|
|
ret = |
|
il4965_rs_switch_to_mimo2(il, lq_sta, conf, sta, |
|
search_tbl, idx); |
|
if (!ret) { |
|
lq_sta->action_counter = 0; |
|
goto out; |
|
} |
|
break; |
|
} |
|
tbl->action++; |
|
if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC) |
|
tbl->action = IL_LEGACY_SWITCH_ANTENNA1; |
|
|
|
if (tbl->action == start_action) |
|
break; |
|
|
|
} |
|
search_tbl->lq_type = LQ_NONE; |
|
return 0; |
|
|
|
out: |
|
lq_sta->search_better_tbl = 1; |
|
tbl->action++; |
|
if (tbl->action > IL_LEGACY_SWITCH_MIMO2_BC) |
|
tbl->action = IL_LEGACY_SWITCH_ANTENNA1; |
|
if (update_search_tbl_counter) |
|
search_tbl->action = tbl->action; |
|
return 0; |
|
|
|
} |
|
|
|
/* |
|
* Try to switch to new modulation mode from SISO |
|
*/ |
|
static int |
|
il4965_rs_move_siso_to_other(struct il_priv *il, struct il_lq_sta *lq_sta, |
|
struct ieee80211_conf *conf, |
|
struct ieee80211_sta *sta, int idx) |
|
{ |
|
u8 is_green = lq_sta->is_green; |
|
struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
|
struct il_scale_tbl_info *search_tbl = |
|
&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
|
struct il_rate_scale_data *win = &(tbl->win[idx]); |
|
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
|
u32 sz = |
|
(sizeof(struct il_scale_tbl_info) - |
|
(sizeof(struct il_rate_scale_data) * RATE_COUNT)); |
|
u8 start_action; |
|
u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
|
u8 tx_chains_num = il->hw_params.tx_chains_num; |
|
u8 update_search_tbl_counter = 0; |
|
int ret; |
|
|
|
start_action = tbl->action; |
|
|
|
for (;;) { |
|
lq_sta->action_counter++; |
|
switch (tbl->action) { |
|
case IL_SISO_SWITCH_ANTENNA1: |
|
case IL_SISO_SWITCH_ANTENNA2: |
|
D_RATE("LQ: SISO toggle Antenna\n"); |
|
if ((tbl->action == IL_SISO_SWITCH_ANTENNA1 && |
|
tx_chains_num <= 1) || |
|
(tbl->action == IL_SISO_SWITCH_ANTENNA2 && |
|
tx_chains_num <= 2)) |
|
break; |
|
|
|
if (win->success_ratio >= IL_RS_GOOD_RATIO) |
|
break; |
|
|
|
memcpy(search_tbl, tbl, sz); |
|
if (il4965_rs_toggle_antenna |
|
(valid_tx_ant, &search_tbl->current_rate, |
|
search_tbl)) { |
|
update_search_tbl_counter = 1; |
|
goto out; |
|
} |
|
break; |
|
case IL_SISO_SWITCH_MIMO2_AB: |
|
case IL_SISO_SWITCH_MIMO2_AC: |
|
case IL_SISO_SWITCH_MIMO2_BC: |
|
D_RATE("LQ: SISO switch to MIMO2\n"); |
|
memcpy(search_tbl, tbl, sz); |
|
search_tbl->is_SGI = 0; |
|
|
|
if (tbl->action == IL_SISO_SWITCH_MIMO2_AB) |
|
search_tbl->ant_type = ANT_AB; |
|
else if (tbl->action == IL_SISO_SWITCH_MIMO2_AC) |
|
search_tbl->ant_type = ANT_AC; |
|
else |
|
search_tbl->ant_type = ANT_BC; |
|
|
|
if (!il4965_rs_is_valid_ant |
|
(valid_tx_ant, search_tbl->ant_type)) |
|
break; |
|
|
|
ret = |
|
il4965_rs_switch_to_mimo2(il, lq_sta, conf, sta, |
|
search_tbl, idx); |
|
if (!ret) |
|
goto out; |
|
break; |
|
case IL_SISO_SWITCH_GI: |
|
if (!tbl->is_ht40 && |
|
!(ht_cap->cap & IEEE80211_HT_CAP_SGI_20)) |
|
break; |
|
if (tbl->is_ht40 && |
|
!(ht_cap->cap & IEEE80211_HT_CAP_SGI_40)) |
|
break; |
|
|
|
D_RATE("LQ: SISO toggle SGI/NGI\n"); |
|
|
|
memcpy(search_tbl, tbl, sz); |
|
if (is_green) { |
|
if (!tbl->is_SGI) |
|
break; |
|
else |
|
IL_ERR("SGI was set in GF+SISO\n"); |
|
} |
|
search_tbl->is_SGI = !tbl->is_SGI; |
|
il4965_rs_set_expected_tpt_table(lq_sta, search_tbl); |
|
if (tbl->is_SGI) { |
|
s32 tpt = lq_sta->last_tpt / 100; |
|
if (tpt >= search_tbl->expected_tpt[idx]) |
|
break; |
|
} |
|
search_tbl->current_rate = |
|
il4965_rate_n_flags_from_tbl(il, search_tbl, idx, |
|
is_green); |
|
update_search_tbl_counter = 1; |
|
goto out; |
|
} |
|
tbl->action++; |
|
if (tbl->action > IL_SISO_SWITCH_GI) |
|
tbl->action = IL_SISO_SWITCH_ANTENNA1; |
|
|
|
if (tbl->action == start_action) |
|
break; |
|
} |
|
search_tbl->lq_type = LQ_NONE; |
|
return 0; |
|
|
|
out: |
|
lq_sta->search_better_tbl = 1; |
|
tbl->action++; |
|
if (tbl->action > IL_SISO_SWITCH_GI) |
|
tbl->action = IL_SISO_SWITCH_ANTENNA1; |
|
if (update_search_tbl_counter) |
|
search_tbl->action = tbl->action; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Try to switch to new modulation mode from MIMO2 |
|
*/ |
|
static int |
|
il4965_rs_move_mimo2_to_other(struct il_priv *il, struct il_lq_sta *lq_sta, |
|
struct ieee80211_conf *conf, |
|
struct ieee80211_sta *sta, int idx) |
|
{ |
|
s8 is_green = lq_sta->is_green; |
|
struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
|
struct il_scale_tbl_info *search_tbl = |
|
&(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
|
struct il_rate_scale_data *win = &(tbl->win[idx]); |
|
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
|
u32 sz = |
|
(sizeof(struct il_scale_tbl_info) - |
|
(sizeof(struct il_rate_scale_data) * RATE_COUNT)); |
|
u8 start_action; |
|
u8 valid_tx_ant = il->hw_params.valid_tx_ant; |
|
u8 tx_chains_num = il->hw_params.tx_chains_num; |
|
u8 update_search_tbl_counter = 0; |
|
int ret; |
|
|
|
start_action = tbl->action; |
|
for (;;) { |
|
lq_sta->action_counter++; |
|
switch (tbl->action) { |
|
case IL_MIMO2_SWITCH_ANTENNA1: |
|
case IL_MIMO2_SWITCH_ANTENNA2: |
|
D_RATE("LQ: MIMO2 toggle Antennas\n"); |
|
|
|
if (tx_chains_num <= 2) |
|
break; |
|
|
|
if (win->success_ratio >= IL_RS_GOOD_RATIO) |
|
break; |
|
|
|
memcpy(search_tbl, tbl, sz); |
|
if (il4965_rs_toggle_antenna |
|
(valid_tx_ant, &search_tbl->current_rate, |
|
search_tbl)) { |
|
update_search_tbl_counter = 1; |
|
goto out; |
|
} |
|
break; |
|
case IL_MIMO2_SWITCH_SISO_A: |
|
case IL_MIMO2_SWITCH_SISO_B: |
|
case IL_MIMO2_SWITCH_SISO_C: |
|
D_RATE("LQ: MIMO2 switch to SISO\n"); |
|
|
|
/* Set up new search table for SISO */ |
|
memcpy(search_tbl, tbl, sz); |
|
|
|
if (tbl->action == IL_MIMO2_SWITCH_SISO_A) |
|
search_tbl->ant_type = ANT_A; |
|
else if (tbl->action == IL_MIMO2_SWITCH_SISO_B) |
|
search_tbl->ant_type = ANT_B; |
|
else |
|
search_tbl->ant_type = ANT_C; |
|
|
|
if (!il4965_rs_is_valid_ant |
|
(valid_tx_ant, search_tbl->ant_type)) |
|
break; |
|
|
|
ret = |
|
il4965_rs_switch_to_siso(il, lq_sta, conf, sta, |
|
search_tbl, idx); |
|
if (!ret) |
|
goto out; |
|
|
|
break; |
|
|
|
case IL_MIMO2_SWITCH_GI: |
|
if (!tbl->is_ht40 && |
|
!(ht_cap->cap & IEEE80211_HT_CAP_SGI_20)) |
|
break; |
|
if (tbl->is_ht40 && |
|
!(ht_cap->cap & IEEE80211_HT_CAP_SGI_40)) |
|
break; |
|
|
|
D_RATE("LQ: MIMO2 toggle SGI/NGI\n"); |
|
|
|
/* Set up new search table for MIMO2 */ |
|
memcpy(search_tbl, tbl, sz); |
|
search_tbl->is_SGI = !tbl->is_SGI; |
|
il4965_rs_set_expected_tpt_table(lq_sta, search_tbl); |
|
/* |
|
* If active table already uses the fastest possible |
|
* modulation (dual stream with short guard interval), |
|
* and it's working well, there's no need to look |
|
* for a better type of modulation! |
|
*/ |
|
if (tbl->is_SGI) { |
|
s32 tpt = lq_sta->last_tpt / 100; |
|
if (tpt >= search_tbl->expected_tpt[idx]) |
|
break; |
|
} |
|
search_tbl->current_rate = |
|
il4965_rate_n_flags_from_tbl(il, search_tbl, idx, |
|
is_green); |
|
update_search_tbl_counter = 1; |
|
goto out; |
|
|
|
} |
|
tbl->action++; |
|
if (tbl->action > IL_MIMO2_SWITCH_GI) |
|
tbl->action = IL_MIMO2_SWITCH_ANTENNA1; |
|
|
|
if (tbl->action == start_action) |
|
break; |
|
} |
|
search_tbl->lq_type = LQ_NONE; |
|
return 0; |
|
out: |
|
lq_sta->search_better_tbl = 1; |
|
tbl->action++; |
|
if (tbl->action > IL_MIMO2_SWITCH_GI) |
|
tbl->action = IL_MIMO2_SWITCH_ANTENNA1; |
|
if (update_search_tbl_counter) |
|
search_tbl->action = tbl->action; |
|
|
|
return 0; |
|
|
|
} |
|
|
|
/* |
|
* 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 |
|
il4965_rs_stay_in_table(struct il_lq_sta *lq_sta, bool force_search) |
|
{ |
|
struct il_scale_tbl_info *tbl; |
|
int i; |
|
int active_tbl; |
|
int flush_interval_passed = 0; |
|
struct il_priv *il; |
|
|
|
il = lq_sta->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->stay_in_tbl) { |
|
|
|
/* Elapsed time using current modulation mode */ |
|
if (lq_sta->flush_timer) |
|
flush_interval_passed = |
|
time_after(jiffies, |
|
(unsigned long)(lq_sta->flush_timer + |
|
RATE_SCALE_FLUSH_INTVL)); |
|
|
|
/* |
|
* 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)) { |
|
D_RATE("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->stay_in_tbl = 0; /* only place reset */ |
|
lq_sta->total_failed = 0; |
|
lq_sta->total_success = 0; |
|
lq_sta->flush_timer = 0; |
|
|
|
/* |
|
* 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; |
|
|
|
D_RATE("LQ: stay in table clear win\n"); |
|
for (i = 0; i < RATE_COUNT; i++) |
|
il4965_rs_rate_scale_clear_win(& |
|
(tbl-> |
|
win |
|
[i])); |
|
} |
|
} |
|
|
|
/* If transitioning to allow "search", reset all history |
|
* bitmaps and stats in active table (this will become the new |
|
* "search" table). */ |
|
if (!lq_sta->stay_in_tbl) { |
|
for (i = 0; i < RATE_COUNT; i++) |
|
il4965_rs_rate_scale_clear_win(&(tbl->win[i])); |
|
} |
|
} |
|
} |
|
|
|
/* |
|
* setup rate table in uCode |
|
*/ |
|
static void |
|
il4965_rs_update_rate_tbl(struct il_priv *il, struct il_lq_sta *lq_sta, |
|
struct il_scale_tbl_info *tbl, int idx, u8 is_green) |
|
{ |
|
u32 rate; |
|
|
|
/* Update uCode's rate table. */ |
|
rate = il4965_rate_n_flags_from_tbl(il, tbl, idx, is_green); |
|
il4965_rs_fill_link_cmd(il, lq_sta, rate); |
|
il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false); |
|
} |
|
|
|
/* |
|
* Do rate scaling and search for new modulation mode. |
|
*/ |
|
static void |
|
il4965_rs_rate_scale_perform(struct il_priv *il, struct sk_buff *skb, |
|
struct ieee80211_sta *sta, |
|
struct il_lq_sta *lq_sta) |
|
{ |
|
struct ieee80211_hw *hw = il->hw; |
|
struct ieee80211_conf *conf = &hw->conf; |
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
|
int low = RATE_INVALID; |
|
int high = RATE_INVALID; |
|
int idx; |
|
int i; |
|
struct il_rate_scale_data *win = NULL; |
|
int current_tpt = IL_INVALID_VALUE; |
|
int low_tpt = IL_INVALID_VALUE; |
|
int high_tpt = IL_INVALID_VALUE; |
|
u32 fail_count; |
|
s8 scale_action = 0; |
|
u16 rate_mask; |
|
u8 update_lq = 0; |
|
struct il_scale_tbl_info *tbl, *tbl1; |
|
u16 rate_scale_idx_msk = 0; |
|
u8 is_green = 0; |
|
u8 active_tbl = 0; |
|
u8 done_search = 0; |
|
u16 high_low; |
|
s32 sr; |
|
u8 tid; |
|
struct il_tid_data *tid_data; |
|
|
|
D_RATE("rate scale calculate new rate for skb\n"); |
|
|
|
/* Send management frames and NO_ACK data using lowest rate. */ |
|
/* TODO: this could probably be improved.. */ |
|
if (!ieee80211_is_data(hdr->frame_control) || |
|
(info->flags & IEEE80211_TX_CTL_NO_ACK)) |
|
return; |
|
|
|
lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
|
|
|
tid = il4965_rs_tl_add_packet(lq_sta, hdr); |
|
if (tid != MAX_TID_COUNT && (lq_sta->tx_agg_tid_en & (1 << tid))) { |
|
tid_data = &il->stations[lq_sta->lq.sta_id].tid[tid]; |
|
if (tid_data->agg.state == IL_AGG_OFF) |
|
lq_sta->is_agg = 0; |
|
else |
|
lq_sta->is_agg = 1; |
|
} else |
|
lq_sta->is_agg = 0; |
|
|
|
/* |
|
* 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]); |
|
if (is_legacy(tbl->lq_type)) |
|
lq_sta->is_green = 0; |
|
else |
|
lq_sta->is_green = il4965_rs_use_green(il, sta); |
|
is_green = lq_sta->is_green; |
|
|
|
/* current tx rate */ |
|
idx = lq_sta->last_txrate_idx; |
|
|
|
D_RATE("Rate scale idx %d for type %d\n", idx, tbl->lq_type); |
|
|
|
/* rates available for this association, and for modulation mode */ |
|
rate_mask = il4965_rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
|
|
|
D_RATE("mask 0x%04X\n", rate_mask); |
|
|
|
/* mask with station rate restriction */ |
|
if (is_legacy(tbl->lq_type)) { |
|
if (lq_sta->band == NL80211_BAND_5GHZ) |
|
/* supp_rates has no CCK bits in A mode */ |
|
rate_scale_idx_msk = |
|
(u16) (rate_mask & |
|
(lq_sta->supp_rates << IL_FIRST_OFDM_RATE)); |
|
else |
|
rate_scale_idx_msk = |
|
(u16) (rate_mask & lq_sta->supp_rates); |
|
|
|
} else |
|
rate_scale_idx_msk = rate_mask; |
|
|
|
if (!rate_scale_idx_msk) |
|
rate_scale_idx_msk = rate_mask; |
|
|
|
if (!((1 << idx) & rate_scale_idx_msk)) { |
|
IL_ERR("Current Rate is not valid\n"); |
|
if (lq_sta->search_better_tbl) { |
|
/* revert to active table if search table is not valid */ |
|
tbl->lq_type = LQ_NONE; |
|
lq_sta->search_better_tbl = 0; |
|
tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
|
/* get "active" rate info */ |
|
idx = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
|
il4965_rs_update_rate_tbl(il, lq_sta, tbl, idx, |
|
is_green); |
|
} |
|
return; |
|
} |
|
|
|
/* Get expected throughput table and history win for current rate */ |
|
if (!tbl->expected_tpt) { |
|
IL_ERR("tbl->expected_tpt is NULL\n"); |
|
return; |
|
} |
|
|
|
/* force user max rate if set by user */ |
|
if (lq_sta->max_rate_idx != -1 && lq_sta->max_rate_idx < idx) { |
|
idx = lq_sta->max_rate_idx; |
|
update_lq = 1; |
|
win = &(tbl->win[idx]); |
|
goto lq_update; |
|
} |
|
|
|
win = &(tbl->win[idx]); |
|
|
|
/* |
|
* 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 = win->counter - win->success_counter; |
|
if (fail_count < RATE_MIN_FAILURE_TH && |
|
win->success_counter < RATE_MIN_SUCCESS_TH) { |
|
D_RATE("LQ: still below TH. succ=%d total=%d " "for idx %d\n", |
|
win->success_counter, win->counter, idx); |
|
|
|
/* Can't calculate this yet; not enough history */ |
|
win->average_tpt = IL_INVALID_VALUE; |
|
|
|
/* Should we stay with this modulation mode, |
|
* or search for a new one? */ |
|
il4965_rs_stay_in_table(lq_sta, false); |
|
|
|
goto out; |
|
} |
|
/* Else we have enough samples; calculate estimate of |
|
* actual average throughput */ |
|
if (win->average_tpt != |
|
((win->success_ratio * tbl->expected_tpt[idx] + 64) / 128)) { |
|
IL_ERR("expected_tpt should have been calculated by now\n"); |
|
win->average_tpt = |
|
((win->success_ratio * tbl->expected_tpt[idx] + 64) / 128); |
|
} |
|
|
|
/* 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 (win->average_tpt > lq_sta->last_tpt) { |
|
|
|
D_RATE("LQ: SWITCHING TO NEW TBL " |
|
"suc=%d cur-tpt=%d old-tpt=%d\n", |
|
win->success_ratio, win->average_tpt, |
|
lq_sta->last_tpt); |
|
|
|
if (!is_legacy(tbl->lq_type)) |
|
lq_sta->enable_counter = 1; |
|
|
|
/* Swap tables; "search" becomes "active" */ |
|
lq_sta->active_tbl = active_tbl; |
|
current_tpt = win->average_tpt; |
|
|
|
/* Else poor success; go back to mode in "active" table */ |
|
} else { |
|
|
|
D_RATE("LQ: GOING BACK TO THE OLD TBL " |
|
"suc=%d cur-tpt=%d old-tpt=%d\n", |
|
win->success_ratio, win->average_tpt, |
|
lq_sta->last_tpt); |
|
|
|
/* Nullify "search" table */ |
|
tbl->lq_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 */ |
|
idx = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
|
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 = |
|
il4965_rs_get_adjacent_rate(il, idx, rate_scale_idx_msk, |
|
tbl->lq_type); |
|
low = high_low & 0xff; |
|
high = (high_low >> 8) & 0xff; |
|
|
|
/* If user set max rate, dont allow higher than user constrain */ |
|
if (lq_sta->max_rate_idx != -1 && lq_sta->max_rate_idx < high) |
|
high = RATE_INVALID; |
|
|
|
sr = win->success_ratio; |
|
|
|
/* Collect measured throughputs for current and adjacent rates */ |
|
current_tpt = win->average_tpt; |
|
if (low != RATE_INVALID) |
|
low_tpt = tbl->win[low].average_tpt; |
|
if (high != RATE_INVALID) |
|
high_tpt = tbl->win[high].average_tpt; |
|
|
|
scale_action = 0; |
|
|
|
/* Too many failures, decrease rate */ |
|
if (sr <= RATE_DECREASE_TH || current_tpt == 0) { |
|
D_RATE("decrease rate because of low success_ratio\n"); |
|
scale_action = -1; |
|
|
|
/* No throughput measured yet for adjacent rates; try increase. */ |
|
} else if (low_tpt == IL_INVALID_VALUE && high_tpt == IL_INVALID_VALUE) { |
|
|
|
if (high != RATE_INVALID && sr >= RATE_INCREASE_TH) |
|
scale_action = 1; |
|
else if (low != RATE_INVALID) |
|
scale_action = 0; |
|
} |
|
|
|
/* Both adjacent throughputs are measured, but neither one has better |
|
* throughput; we're using the best rate, don't change it! */ |
|
else if (low_tpt != IL_INVALID_VALUE && high_tpt != IL_INVALID_VALUE && |
|
low_tpt < current_tpt && high_tpt < current_tpt) |
|
scale_action = 0; |
|
|
|
/* At least one adjacent rate's throughput is measured, |
|
* and may have better performance. */ |
|
else { |
|
/* Higher adjacent rate's throughput is measured */ |
|
if (high_tpt != IL_INVALID_VALUE) { |
|
/* Higher rate has better throughput */ |
|
if (high_tpt > current_tpt && sr >= RATE_INCREASE_TH) |
|
scale_action = 1; |
|
else |
|
scale_action = 0; |
|
|
|
/* Lower adjacent rate's throughput is measured */ |
|
} else if (low_tpt != IL_INVALID_VALUE) { |
|
/* Lower rate has better throughput */ |
|
if (low_tpt > current_tpt) { |
|
D_RATE("decrease rate because of low tpt\n"); |
|
scale_action = -1; |
|
} else if (sr >= RATE_INCREASE_TH) { |
|
scale_action = 1; |
|
} |
|
} |
|
} |
|
|
|
/* Sanity check; asked for decrease, but success rate or throughput |
|
* has been good at old rate. Don't change it. */ |
|
if (scale_action == -1 && low != RATE_INVALID && |
|
(sr > RATE_HIGH_TH || current_tpt > 100 * tbl->expected_tpt[low])) |
|
scale_action = 0; |
|
|
|
switch (scale_action) { |
|
case -1: |
|
/* Decrease starting rate, update uCode's rate table */ |
|
if (low != RATE_INVALID) { |
|
update_lq = 1; |
|
idx = low; |
|
} |
|
|
|
break; |
|
case 1: |
|
/* Increase starting rate, update uCode's rate table */ |
|
if (high != RATE_INVALID) { |
|
update_lq = 1; |
|
idx = high; |
|
} |
|
|
|
break; |
|
case 0: |
|
/* No change */ |
|
default: |
|
break; |
|
} |
|
|
|
D_RATE("choose rate scale idx %d action %d low %d " "high %d type %d\n", |
|
idx, scale_action, low, high, tbl->lq_type); |
|
|
|
lq_update: |
|
/* Replace uCode's rate table for the destination station. */ |
|
if (update_lq) |
|
il4965_rs_update_rate_tbl(il, lq_sta, tbl, idx, is_green); |
|
|
|
/* Should we stay with this modulation mode, |
|
* or search for a new one? */ |
|
il4965_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->stay_in_tbl && win->counter) { |
|
/* Save current throughput to compare with "search" throughput */ |
|
lq_sta->last_tpt = current_tpt; |
|
|
|
/* Select a new "search" modulation mode to try. |
|
* If one is found, set up the new "search" table. */ |
|
if (is_legacy(tbl->lq_type)) |
|
il4965_rs_move_legacy_other(il, lq_sta, conf, sta, idx); |
|
else if (is_siso(tbl->lq_type)) |
|
il4965_rs_move_siso_to_other(il, lq_sta, conf, sta, |
|
idx); |
|
else /* (is_mimo2(tbl->lq_type)) */ |
|
il4965_rs_move_mimo2_to_other(il, lq_sta, conf, sta, |
|
idx); |
|
|
|
/* 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)]); |
|
for (i = 0; i < RATE_COUNT; i++) |
|
il4965_rs_rate_scale_clear_win(&(tbl->win[i])); |
|
|
|
/* Use new "search" start rate */ |
|
idx = il4965_hwrate_to_plcp_idx(tbl->current_rate); |
|
|
|
D_RATE("Switch current mcs: %X idx: %d\n", |
|
tbl->current_rate, idx); |
|
il4965_rs_fill_link_cmd(il, lq_sta, tbl->current_rate); |
|
il_send_lq_cmd(il, &lq_sta->lq, CMD_ASYNC, false); |
|
} else |
|
done_search = 1; |
|
} |
|
|
|
if (done_search && !lq_sta->stay_in_tbl) { |
|
/* If the "active" (non-search) mode was legacy, |
|
* and we've tried switching antennas, |
|
* but we haven't been able to try HT modes (not available), |
|
* 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->lq_type) && !conf_is_ht(conf) && |
|
lq_sta->action_counter > tbl1->max_search) { |
|
D_RATE("LQ: STAY in legacy table\n"); |
|
il4965_rs_set_stay_in_table(il, 1, lq_sta); |
|
} |
|
|
|
/* 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->enable_counter && |
|
lq_sta->action_counter >= tbl1->max_search) { |
|
if (lq_sta->last_tpt > IL_AGG_TPT_THREHOLD && |
|
(lq_sta->tx_agg_tid_en & (1 << tid)) && |
|
tid != MAX_TID_COUNT) { |
|
tid_data = |
|
&il->stations[lq_sta->lq.sta_id].tid[tid]; |
|
if (tid_data->agg.state == IL_AGG_OFF) { |
|
D_RATE("try to aggregate tid %d\n", |
|
tid); |
|
il4965_rs_tl_turn_on_agg(il, tid, |
|
lq_sta, sta); |
|
} |
|
} |
|
il4965_rs_set_stay_in_table(il, 0, lq_sta); |
|
} |
|
} |
|
|
|
out: |
|
tbl->current_rate = |
|
il4965_rate_n_flags_from_tbl(il, tbl, idx, is_green); |
|
i = idx; |
|
lq_sta->last_txrate_idx = i; |
|
} |
|
|
|
/* |
|
* il4965_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-4965-rs rate scaling algorithm is used, instead of |
|
* rc80211_simple. |
|
* |
|
* NOTE: Run C_ADD_STA command to set up station table entry, before |
|
* calling this function (which runs C_TX_LINK_QUALITY_CMD, |
|
* which requires station table entry to exist). |
|
*/ |
|
static void |
|
il4965_rs_initialize_lq(struct il_priv *il, struct ieee80211_conf *conf, |
|
struct ieee80211_sta *sta, struct il_lq_sta *lq_sta) |
|
{ |
|
struct il_scale_tbl_info *tbl; |
|
int rate_idx; |
|
int i; |
|
u32 rate; |
|
u8 use_green; |
|
u8 active_tbl = 0; |
|
u8 valid_tx_ant; |
|
|
|
if (!sta || !lq_sta) |
|
return; |
|
|
|
use_green = il4965_rs_use_green(il, sta); |
|
|
|
i = lq_sta->last_txrate_idx; |
|
|
|
valid_tx_ant = il->hw_params.valid_tx_ant; |
|
|
|
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]); |
|
|
|
if (i < 0 || i >= RATE_COUNT) |
|
i = 0; |
|
|
|
rate = il_rates[i].plcp; |
|
tbl->ant_type = il4965_first_antenna(valid_tx_ant); |
|
rate |= tbl->ant_type << RATE_MCS_ANT_POS; |
|
|
|
if (i >= IL_FIRST_CCK_RATE && i <= IL_LAST_CCK_RATE) |
|
rate |= RATE_MCS_CCK_MSK; |
|
|
|
il4965_rs_get_tbl_info_from_mcs(rate, il->band, tbl, &rate_idx); |
|
if (!il4965_rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
|
il4965_rs_toggle_antenna(valid_tx_ant, &rate, tbl); |
|
|
|
rate = il4965_rate_n_flags_from_tbl(il, tbl, rate_idx, use_green); |
|
tbl->current_rate = rate; |
|
il4965_rs_set_expected_tpt_table(lq_sta, tbl); |
|
il4965_rs_fill_link_cmd(NULL, lq_sta, rate); |
|
il->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq; |
|
il_send_lq_cmd(il, &lq_sta->lq, CMD_SYNC, true); |
|
} |
|
|
|
static void |
|
il4965_rs_get_rate(void *il_r, struct ieee80211_sta *sta, void *il_sta, |
|
struct ieee80211_tx_rate_control *txrc) |
|
{ |
|
|
|
struct sk_buff *skb = txrc->skb; |
|
struct ieee80211_supported_band *sband = txrc->sband; |
|
struct il_priv *il __maybe_unused = (struct il_priv *)il_r; |
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
|
struct il_lq_sta *lq_sta = il_sta; |
|
int rate_idx; |
|
|
|
D_RATE("rate scale calculate new rate for skb\n"); |
|
|
|
/* Get max rate if user set max rate */ |
|
if (lq_sta) { |
|
lq_sta->max_rate_idx = fls(txrc->rate_idx_mask) - 1; |
|
if (sband->band == NL80211_BAND_5GHZ && |
|
lq_sta->max_rate_idx != -1) |
|
lq_sta->max_rate_idx += IL_FIRST_OFDM_RATE; |
|
if (lq_sta->max_rate_idx < 0 || |
|
lq_sta->max_rate_idx >= RATE_COUNT) |
|
lq_sta->max_rate_idx = -1; |
|
} |
|
|
|
/* Treat uninitialized rate scaling data same as non-existing. */ |
|
if (lq_sta && !lq_sta->drv) { |
|
D_RATE("Rate scaling not initialized yet.\n"); |
|
il_sta = NULL; |
|
} |
|
|
|
if (!lq_sta) |
|
return; |
|
|
|
rate_idx = lq_sta->last_txrate_idx; |
|
|
|
if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { |
|
rate_idx -= IL_FIRST_OFDM_RATE; |
|
/* 6M and 9M shared same MCS idx */ |
|
rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; |
|
if (il4965_rs_extract_rate(lq_sta->last_rate_n_flags) >= |
|
RATE_MIMO2_6M_PLCP) |
|
rate_idx = rate_idx + MCS_IDX_PER_STREAM; |
|
info->control.rates[0].flags = IEEE80211_TX_RC_MCS; |
|
if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) |
|
info->control.rates[0].flags |= |
|
IEEE80211_TX_RC_SHORT_GI; |
|
if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) |
|
info->control.rates[0].flags |= |
|
IEEE80211_TX_RC_DUP_DATA; |
|
if (lq_sta->last_rate_n_flags & RATE_MCS_HT40_MSK) |
|
info->control.rates[0].flags |= |
|
IEEE80211_TX_RC_40_MHZ_WIDTH; |
|
if (lq_sta->last_rate_n_flags & RATE_MCS_GF_MSK) |
|
info->control.rates[0].flags |= |
|
IEEE80211_TX_RC_GREEN_FIELD; |
|
} else { |
|
/* Check for invalid rates */ |
|
if (rate_idx < 0 || rate_idx >= RATE_COUNT_LEGACY || |
|
(sband->band == NL80211_BAND_5GHZ && |
|
rate_idx < IL_FIRST_OFDM_RATE)) |
|
rate_idx = rate_lowest_index(sband, sta); |
|
/* On valid 5 GHz rate, adjust idx */ |
|
else if (sband->band == NL80211_BAND_5GHZ) |
|
rate_idx -= IL_FIRST_OFDM_RATE; |
|
info->control.rates[0].flags = 0; |
|
} |
|
info->control.rates[0].idx = rate_idx; |
|
info->control.rates[0].count = 1; |
|
} |
|
|
|
static void * |
|
il4965_rs_alloc_sta(void *il_rate, struct ieee80211_sta *sta, gfp_t gfp) |
|
{ |
|
struct il_station_priv *sta_priv = |
|
(struct il_station_priv *)sta->drv_priv; |
|
struct il_priv *il; |
|
|
|
il = (struct il_priv *)il_rate; |
|
D_RATE("create station rate scale win\n"); |
|
|
|
return &sta_priv->lq_sta; |
|
} |
|
|
|
/* |
|
* Called after adding a new station to initialize rate scaling |
|
*/ |
|
void |
|
il4965_rs_rate_init(struct il_priv *il, struct ieee80211_sta *sta, u8 sta_id) |
|
{ |
|
int i, j; |
|
struct ieee80211_hw *hw = il->hw; |
|
struct ieee80211_conf *conf = &il->hw->conf; |
|
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
|
struct il_station_priv *sta_priv; |
|
struct il_lq_sta *lq_sta; |
|
struct ieee80211_supported_band *sband; |
|
|
|
sta_priv = (struct il_station_priv *)sta->drv_priv; |
|
lq_sta = &sta_priv->lq_sta; |
|
sband = hw->wiphy->bands[conf->chandef.chan->band]; |
|
|
|
lq_sta->lq.sta_id = sta_id; |
|
|
|
for (j = 0; j < LQ_SIZE; j++) |
|
for (i = 0; i < RATE_COUNT; i++) |
|
il4965_rs_rate_scale_clear_win(&lq_sta->lq_info[j]. |
|
win[i]); |
|
|
|
lq_sta->flush_timer = 0; |
|
lq_sta->supp_rates = sta->supp_rates[sband->band]; |
|
for (j = 0; j < LQ_SIZE; j++) |
|
for (i = 0; i < RATE_COUNT; i++) |
|
il4965_rs_rate_scale_clear_win(&lq_sta->lq_info[j]. |
|
win[i]); |
|
|
|
D_RATE("LQ:" "*** rate scale station global init for station %d ***\n", |
|
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->is_dup = 0; |
|
lq_sta->max_rate_idx = -1; |
|
lq_sta->missed_rate_counter = IL_MISSED_RATE_MAX; |
|
lq_sta->is_green = il4965_rs_use_green(il, sta); |
|
lq_sta->active_legacy_rate = il->active_rate & ~(0x1000); |
|
lq_sta->band = il->band; |
|
/* |
|
* 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 <<= IL_FIRST_OFDM_RATE; |
|
|
|
/* Same here */ |
|
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 <<= IL_FIRST_OFDM_RATE; |
|
|
|
/* These values will be overridden later */ |
|
lq_sta->lq.general_params.single_stream_ant_msk = |
|
il4965_first_antenna(il->hw_params.valid_tx_ant); |
|
lq_sta->lq.general_params.dual_stream_ant_msk = |
|
il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params. |
|
valid_tx_ant); |
|
if (!lq_sta->lq.general_params.dual_stream_ant_msk) { |
|
lq_sta->lq.general_params.dual_stream_ant_msk = ANT_AB; |
|
} else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) { |
|
lq_sta->lq.general_params.dual_stream_ant_msk = |
|
il->hw_params.valid_tx_ant; |
|
} |
|
|
|
/* as default allow aggregation for all tids */ |
|
lq_sta->tx_agg_tid_en = IL_AGG_ALL_TID; |
|
lq_sta->drv = il; |
|
|
|
/* Set last_txrate_idx to lowest rate */ |
|
lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); |
|
if (sband->band == NL80211_BAND_5GHZ) |
|
lq_sta->last_txrate_idx += IL_FIRST_OFDM_RATE; |
|
lq_sta->is_agg = 0; |
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS |
|
lq_sta->dbg_fixed_rate = 0; |
|
#endif |
|
|
|
il4965_rs_initialize_lq(il, conf, sta, lq_sta); |
|
} |
|
|
|
static void |
|
il4965_rs_fill_link_cmd(struct il_priv *il, struct il_lq_sta *lq_sta, |
|
u32 new_rate) |
|
{ |
|
struct il_scale_tbl_info tbl_type; |
|
int idx = 0; |
|
int rate_idx; |
|
int repeat_rate = 0; |
|
u8 ant_toggle_cnt = 0; |
|
u8 use_ht_possible = 1; |
|
u8 valid_tx_ant = 0; |
|
struct il_link_quality_cmd *lq_cmd = &lq_sta->lq; |
|
|
|
/* Override starting rate (idx 0) if needed for debug purposes */ |
|
il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx); |
|
|
|
/* Interpret new_rate (rate_n_flags) */ |
|
il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
|
&rate_idx); |
|
|
|
/* How many times should we repeat the initial rate? */ |
|
if (is_legacy(tbl_type.lq_type)) { |
|
ant_toggle_cnt = 1; |
|
repeat_rate = IL_NUMBER_TRY; |
|
} else { |
|
repeat_rate = IL_HT_NUMBER_TRY; |
|
} |
|
|
|
lq_cmd->general_params.mimo_delimiter = |
|
is_mimo(tbl_type.lq_type) ? 1 : 0; |
|
|
|
/* Fill 1st table entry (idx 0) */ |
|
lq_cmd->rs_table[idx].rate_n_flags = cpu_to_le32(new_rate); |
|
|
|
if (il4965_num_of_ant(tbl_type.ant_type) == 1) { |
|
lq_cmd->general_params.single_stream_ant_msk = |
|
tbl_type.ant_type; |
|
} else if (il4965_num_of_ant(tbl_type.ant_type) == 2) { |
|
lq_cmd->general_params.dual_stream_ant_msk = tbl_type.ant_type; |
|
} |
|
/* otherwise we don't modify the existing value */ |
|
idx++; |
|
repeat_rate--; |
|
if (il) |
|
valid_tx_ant = il->hw_params.valid_tx_ant; |
|
|
|
/* Fill rest of rate table */ |
|
while (idx < LINK_QUAL_MAX_RETRY_NUM) { |
|
/* Repeat initial/next rate. |
|
* For legacy IL_NUMBER_TRY == 1, this loop will not execute. |
|
* For HT IL_HT_NUMBER_TRY == 3, this executes twice. */ |
|
while (repeat_rate > 0 && idx < LINK_QUAL_MAX_RETRY_NUM) { |
|
if (is_legacy(tbl_type.lq_type)) { |
|
if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
|
ant_toggle_cnt++; |
|
else if (il && |
|
il4965_rs_toggle_antenna(valid_tx_ant, |
|
&new_rate, |
|
&tbl_type)) |
|
ant_toggle_cnt = 1; |
|
} |
|
|
|
/* Override next rate if needed for debug purposes */ |
|
il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx); |
|
|
|
/* Fill next table entry */ |
|
lq_cmd->rs_table[idx].rate_n_flags = |
|
cpu_to_le32(new_rate); |
|
repeat_rate--; |
|
idx++; |
|
} |
|
|
|
il4965_rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
|
&tbl_type, &rate_idx); |
|
|
|
/* Indicate to uCode which entries might be MIMO. |
|
* If initial rate was MIMO, this will finally end up |
|
* as (IL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ |
|
if (is_mimo(tbl_type.lq_type)) |
|
lq_cmd->general_params.mimo_delimiter = idx; |
|
|
|
/* Get next rate */ |
|
new_rate = |
|
il4965_rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, |
|
use_ht_possible); |
|
|
|
/* How many times should we repeat the next rate? */ |
|
if (is_legacy(tbl_type.lq_type)) { |
|
if (ant_toggle_cnt < NUM_TRY_BEFORE_ANT_TOGGLE) |
|
ant_toggle_cnt++; |
|
else if (il && |
|
il4965_rs_toggle_antenna(valid_tx_ant, |
|
&new_rate, &tbl_type)) |
|
ant_toggle_cnt = 1; |
|
|
|
repeat_rate = IL_NUMBER_TRY; |
|
} else { |
|
repeat_rate = IL_HT_NUMBER_TRY; |
|
} |
|
|
|
/* Don't allow HT rates after next pass. |
|
* il4965_rs_get_lower_rate() will change type to LQ_A or LQ_G. */ |
|
use_ht_possible = 0; |
|
|
|
/* Override next rate if needed for debug purposes */ |
|
il4965_rs_dbgfs_set_mcs(lq_sta, &new_rate, idx); |
|
|
|
/* Fill next table entry */ |
|
lq_cmd->rs_table[idx].rate_n_flags = cpu_to_le32(new_rate); |
|
|
|
idx++; |
|
repeat_rate--; |
|
} |
|
|
|
lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_DEF; |
|
lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; |
|
|
|
lq_cmd->agg_params.agg_time_limit = |
|
cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); |
|
} |
|
|
|
static void * |
|
il4965_rs_alloc(struct ieee80211_hw *hw) |
|
{ |
|
return hw->priv; |
|
} |
|
|
|
/* rate scale requires free function to be implemented */ |
|
static void |
|
il4965_rs_free(void *il_rate) |
|
{ |
|
return; |
|
} |
|
|
|
static void |
|
il4965_rs_free_sta(void *il_r, struct ieee80211_sta *sta, void *il_sta) |
|
{ |
|
struct il_priv *il __maybe_unused = il_r; |
|
|
|
D_RATE("enter\n"); |
|
D_RATE("leave\n"); |
|
} |
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS |
|
|
|
static void |
|
il4965_rs_dbgfs_set_mcs(struct il_lq_sta *lq_sta, u32 * rate_n_flags, int idx) |
|
{ |
|
struct il_priv *il; |
|
u8 valid_tx_ant; |
|
u8 ant_sel_tx; |
|
|
|
il = lq_sta->drv; |
|
valid_tx_ant = il->hw_params.valid_tx_ant; |
|
if (lq_sta->dbg_fixed_rate) { |
|
ant_sel_tx = |
|
((lq_sta-> |
|
dbg_fixed_rate & RATE_MCS_ANT_ABC_MSK) >> |
|
RATE_MCS_ANT_POS); |
|
if ((valid_tx_ant & ant_sel_tx) == ant_sel_tx) { |
|
*rate_n_flags = lq_sta->dbg_fixed_rate; |
|
D_RATE("Fixed rate ON\n"); |
|
} else { |
|
lq_sta->dbg_fixed_rate = 0; |
|
IL_ERR |
|
("Invalid antenna selection 0x%X, Valid is 0x%X\n", |
|
ant_sel_tx, valid_tx_ant); |
|
D_RATE("Fixed rate OFF\n"); |
|
} |
|
} else { |
|
D_RATE("Fixed rate OFF\n"); |
|
} |
|
} |
|
|
|
static ssize_t |
|
il4965_rs_sta_dbgfs_scale_table_write(struct file *file, |
|
const char __user *user_buf, |
|
size_t count, loff_t *ppos) |
|
{ |
|
struct il_lq_sta *lq_sta = file->private_data; |
|
struct il_priv *il; |
|
char buf[64]; |
|
size_t buf_size; |
|
u32 parsed_rate; |
|
|
|
il = lq_sta->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->dbg_fixed_rate = parsed_rate; |
|
else |
|
lq_sta->dbg_fixed_rate = 0; |
|
|
|
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 */ |
|
|
|
D_RATE("sta_id %d rate 0x%X\n", lq_sta->lq.sta_id, |
|
lq_sta->dbg_fixed_rate); |
|
|
|
if (lq_sta->dbg_fixed_rate) { |
|
il4965_rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
|
il_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC, false); |
|
} |
|
|
|
return count; |
|
} |
|
|
|
static ssize_t |
|
il4965_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; |
|
int idx = 0; |
|
ssize_t ret; |
|
|
|
struct il_lq_sta *lq_sta = file->private_data; |
|
struct il_priv *il; |
|
struct il_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
|
|
|
il = lq_sta->drv; |
|
buff = kmalloc(1024, 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%X\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->dbg_fixed_rate); |
|
desc += |
|
sprintf(buff + desc, "valid_tx_ant %s%s%s\n", |
|
(il->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", |
|
(il->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", |
|
(il->hw_params.valid_tx_ant & ANT_C) ? "ANT_C" : ""); |
|
desc += |
|
sprintf(buff + desc, "lq type %s\n", |
|
(is_legacy(tbl->lq_type)) ? "legacy" : "HT"); |
|
if (is_Ht(tbl->lq_type)) { |
|
desc += |
|
sprintf(buff + desc, " %s", |
|
(is_siso(tbl->lq_type)) ? "SISO" : "MIMO2"); |
|
desc += |
|
sprintf(buff + desc, " %s", |
|
(tbl->is_ht40) ? "40MHz" : "20MHz"); |
|
desc += |
|
sprintf(buff + desc, " %s %s %s\n", |
|
(tbl->is_SGI) ? "SGI" : "", |
|
(lq_sta->is_green) ? "GF enabled" : "", |
|
(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-ant0x%x d-ant=0x%x\n", |
|
lq_sta->lq.general_params.flags, |
|
lq_sta->lq.general_params.mimo_delimiter, |
|
lq_sta->lq.general_params.single_stream_ant_msk, |
|
lq_sta->lq.general_params.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_params.agg_time_limit), |
|
lq_sta->lq.agg_params.agg_dis_start_th, |
|
lq_sta->lq.agg_params.agg_frame_cnt_limit); |
|
|
|
desc += |
|
sprintf(buff + desc, |
|
"Start idx [0]=0x%x [1]=0x%x [2]=0x%x [3]=0x%x\n", |
|
lq_sta->lq.general_params.start_rate_idx[0], |
|
lq_sta->lq.general_params.start_rate_idx[1], |
|
lq_sta->lq.general_params.start_rate_idx[2], |
|
lq_sta->lq.general_params.start_rate_idx[3]); |
|
|
|
for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
|
idx = |
|
il4965_hwrate_to_plcp_idx(le32_to_cpu |
|
(lq_sta->lq.rs_table[i]. |
|
rate_n_flags)); |
|
if (is_legacy(tbl->lq_type)) { |
|
desc += |
|
sprintf(buff + desc, " rate[%d] 0x%X %smbps\n", i, |
|
le32_to_cpu(lq_sta->lq.rs_table[i]. |
|
rate_n_flags), |
|
il_rate_mcs[idx].mbps); |
|
} else { |
|
desc += |
|
sprintf(buff + desc, " rate[%d] 0x%X %smbps (%s)\n", |
|
i, |
|
le32_to_cpu(lq_sta->lq.rs_table[i]. |
|
rate_n_flags), |
|
il_rate_mcs[idx].mbps, |
|
il_rate_mcs[idx].mcs); |
|
} |
|
} |
|
|
|
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 = il4965_rs_sta_dbgfs_scale_table_write, |
|
.read = il4965_rs_sta_dbgfs_scale_table_read, |
|
.open = simple_open, |
|
.llseek = default_llseek, |
|
}; |
|
|
|
static ssize_t |
|
il4965_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 il_lq_sta *lq_sta = file->private_data; |
|
|
|
buff = kmalloc(1024, GFP_KERNEL); |
|
if (!buff) |
|
return -ENOMEM; |
|
|
|
for (i = 0; i < LQ_SIZE; i++) { |
|
desc += |
|
sprintf(buff + desc, |
|
"%s type=%d SGI=%d HT40=%d DUP=%d GF=%d\n" |
|
"rate=0x%X\n", lq_sta->active_tbl == i ? "*" : "x", |
|
lq_sta->lq_info[i].lq_type, |
|
lq_sta->lq_info[i].is_SGI, |
|
lq_sta->lq_info[i].is_ht40, |
|
lq_sta->lq_info[i].is_dup, lq_sta->is_green, |
|
lq_sta->lq_info[i].current_rate); |
|
for (j = 0; j < RATE_COUNT; j++) { |
|
desc += |
|
sprintf(buff + desc, |
|
"counter=%d success=%d %%=%d\n", |
|
lq_sta->lq_info[i].win[j].counter, |
|
lq_sta->lq_info[i].win[j].success_counter, |
|
lq_sta->lq_info[i].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 = il4965_rs_sta_dbgfs_stats_table_read, |
|
.open = simple_open, |
|
.llseek = default_llseek, |
|
}; |
|
|
|
static ssize_t |
|
il4965_rs_sta_dbgfs_rate_scale_data_read(struct file *file, |
|
char __user *user_buf, size_t count, |
|
loff_t *ppos) |
|
{ |
|
char buff[120]; |
|
int desc = 0; |
|
struct il_lq_sta *lq_sta = file->private_data; |
|
struct il_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; |
|
|
|
if (is_Ht(tbl->lq_type)) |
|
desc += |
|
sprintf(buff + desc, "Bit Rate= %d Mb/s\n", |
|
tbl->expected_tpt[lq_sta->last_txrate_idx]); |
|
else |
|
desc += |
|
sprintf(buff + desc, "Bit Rate= %d Mb/s\n", |
|
il_rates[lq_sta->last_txrate_idx].ieee >> 1); |
|
|
|
return simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
|
} |
|
|
|
static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { |
|
.read = il4965_rs_sta_dbgfs_rate_scale_data_read, |
|
.open = simple_open, |
|
.llseek = default_llseek, |
|
}; |
|
|
|
static void |
|
il4965_rs_add_debugfs(void *il, void *il_sta, struct dentry *dir) |
|
{ |
|
struct il_lq_sta *lq_sta = il_sta; |
|
|
|
debugfs_create_file("rate_scale_table", 0600, dir, lq_sta, |
|
&rs_sta_dbgfs_scale_table_ops); |
|
debugfs_create_file("rate_stats_table", 0400, dir, lq_sta, |
|
&rs_sta_dbgfs_stats_table_ops); |
|
debugfs_create_file("rate_scale_data", 0400, dir, lq_sta, |
|
&rs_sta_dbgfs_rate_scale_data_ops); |
|
debugfs_create_u8("tx_agg_tid_enable", 0600, dir, |
|
&lq_sta->tx_agg_tid_en); |
|
} |
|
#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 |
|
il4965_rs_rate_init_stub(void *il_r, struct ieee80211_supported_band *sband, |
|
struct cfg80211_chan_def *chandef, |
|
struct ieee80211_sta *sta, void *il_sta) |
|
{ |
|
} |
|
|
|
static const struct rate_control_ops rs_4965_ops = { |
|
.name = IL4965_RS_NAME, |
|
.tx_status = il4965_rs_tx_status, |
|
.get_rate = il4965_rs_get_rate, |
|
.rate_init = il4965_rs_rate_init_stub, |
|
.alloc = il4965_rs_alloc, |
|
.free = il4965_rs_free, |
|
.alloc_sta = il4965_rs_alloc_sta, |
|
.free_sta = il4965_rs_free_sta, |
|
#ifdef CONFIG_MAC80211_DEBUGFS |
|
.add_sta_debugfs = il4965_rs_add_debugfs, |
|
#endif |
|
}; |
|
|
|
int |
|
il4965_rate_control_register(void) |
|
{ |
|
return ieee80211_rate_control_register(&rs_4965_ops); |
|
} |
|
|
|
void |
|
il4965_rate_control_unregister(void) |
|
{ |
|
ieee80211_rate_control_unregister(&rs_4965_ops); |
|
}
|
|
|