| /****************************************************************************** |
| * |
| * Copyright(c) 2005 - 2010 Intel Corporation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| * |
| * The full GNU General Public License is included in this distribution in the |
| * file called LICENSE. |
| * |
| * Contact Information: |
| * Intel Linux Wireless <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| *****************************************************************************/ |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/skbuff.h> |
| #include <linux/slab.h> |
| #include <linux/wireless.h> |
| #include <net/mac80211.h> |
| |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/delay.h> |
| |
| #include <linux/workqueue.h> |
| |
| #include "iwl-dev.h" |
| #include "iwl-sta.h" |
| #include "iwl-core.h" |
| #include "iwl-agn.h" |
| |
| #define RS_NAME "iwl-agn-rs" |
| |
| #define NUM_TRY_BEFORE_ANT_TOGGLE 1 |
| #define IWL_NUMBER_TRY 1 |
| #define IWL_HT_NUMBER_TRY 3 |
| |
| #define IWL_RATE_MAX_WINDOW 62 /* # tx in history window */ |
| #define IWL_RATE_MIN_FAILURE_TH 6 /* min failures to calc tpt */ |
| #define IWL_RATE_MIN_SUCCESS_TH 8 /* min successes to calc tpt */ |
| |
| /* max allowed rate miss before sync LQ cmd */ |
| #define IWL_MISSED_RATE_MAX 15 |
| /* max time to accum history 2 seconds */ |
| #define IWL_RATE_SCALE_FLUSH_INTVL (3*HZ) |
| |
| static u8 rs_ht_to_legacy[] = { |
| IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, |
| IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, |
| IWL_RATE_6M_INDEX, |
| IWL_RATE_6M_INDEX, IWL_RATE_9M_INDEX, |
| IWL_RATE_12M_INDEX, IWL_RATE_18M_INDEX, |
| IWL_RATE_24M_INDEX, IWL_RATE_36M_INDEX, |
| IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX |
| }; |
| |
| static const u8 ant_toggle_lookup[] = { |
| /*ANT_NONE -> */ ANT_NONE, |
| /*ANT_A -> */ ANT_B, |
| /*ANT_B -> */ ANT_C, |
| /*ANT_AB -> */ ANT_BC, |
| /*ANT_C -> */ ANT_A, |
| /*ANT_AC -> */ ANT_AB, |
| /*ANT_BC -> */ ANT_AC, |
| /*ANT_ABC -> */ ANT_ABC, |
| }; |
| |
| #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \ |
| [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \ |
| IWL_RATE_SISO_##s##M_PLCP, \ |
| IWL_RATE_MIMO2_##s##M_PLCP,\ |
| IWL_RATE_MIMO3_##s##M_PLCP,\ |
| IWL_RATE_##r##M_IEEE, \ |
| IWL_RATE_##ip##M_INDEX, \ |
| IWL_RATE_##in##M_INDEX, \ |
| IWL_RATE_##rp##M_INDEX, \ |
| IWL_RATE_##rn##M_INDEX, \ |
| IWL_RATE_##pp##M_INDEX, \ |
| IWL_RATE_##np##M_INDEX } |
| |
| /* |
| * Parameter order: |
| * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate |
| * |
| * If there isn't a valid next or previous rate then INV is used which |
| * maps to IWL_RATE_INVALID |
| * |
| */ |
| const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = { |
| IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */ |
| IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */ |
| IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */ |
| IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */ |
| IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */ |
| IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */ |
| IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */ |
| IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */ |
| IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */ |
| IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */ |
| IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */ |
| IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */ |
| IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */ |
| /* FIXME:RS: ^^ should be INV (legacy) */ |
| }; |
| |
| static inline u8 rs_extract_rate(u32 rate_n_flags) |
| { |
| return (u8)(rate_n_flags & RATE_MCS_RATE_MSK); |
| } |
| |
| static int iwl_hwrate_to_plcp_idx(u32 rate_n_flags) |
| { |
| int idx = 0; |
| |
| /* HT rate format */ |
| if (rate_n_flags & RATE_MCS_HT_MSK) { |
| idx = rs_extract_rate(rate_n_flags); |
| |
| if (idx >= IWL_RATE_MIMO3_6M_PLCP) |
| idx = idx - IWL_RATE_MIMO3_6M_PLCP; |
| else if (idx >= IWL_RATE_MIMO2_6M_PLCP) |
| idx = idx - IWL_RATE_MIMO2_6M_PLCP; |
| |
| idx += IWL_FIRST_OFDM_RATE; |
| /* skip 9M not supported in ht*/ |
| if (idx >= IWL_RATE_9M_INDEX) |
| idx += 1; |
| if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE)) |
| return idx; |
| |
| /* legacy rate format, search for match in table */ |
| } else { |
| for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++) |
| if (iwl_rates[idx].plcp == |
| rs_extract_rate(rate_n_flags)) |
| return idx; |
| } |
| |
| return -1; |
| } |
| |
| static void rs_rate_scale_perform(struct iwl_priv *priv, |
| struct sk_buff *skb, |
| struct ieee80211_sta *sta, |
| struct iwl_lq_sta *lq_sta); |
| static void rs_fill_link_cmd(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_sta, u32 rate_n_flags); |
| static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search); |
| |
| |
| #ifdef CONFIG_MAC80211_DEBUGFS |
| static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
| u32 *rate_n_flags, int index); |
| #else |
| static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
| u32 *rate_n_flags, int index) |
| {} |
| #endif |
| |
| /** |
| * The following tables contain the expected throughput metrics for all rates |
| * |
| * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits |
| * |
| * where invalid entries are zeros. |
| * |
| * CCK rates are only valid in legacy table and will only be used in G |
| * (2.4 GHz) band. |
| */ |
| |
| static s32 expected_tpt_legacy[IWL_RATE_COUNT] = { |
| 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 0 |
| }; |
| |
| static s32 expected_tpt_siso20MHz[4][IWL_RATE_COUNT] = { |
| {0, 0, 0, 0, 42, 0, 76, 102, 124, 159, 183, 193, 202}, /* Norm */ |
| {0, 0, 0, 0, 46, 0, 82, 110, 132, 168, 192, 202, 210}, /* SGI */ |
| {0, 0, 0, 0, 47, 0, 91, 133, 171, 242, 305, 334, 362}, /* AGG */ |
| {0, 0, 0, 0, 52, 0, 101, 145, 187, 264, 330, 361, 390}, /* AGG+SGI */ |
| }; |
| |
| static s32 expected_tpt_siso40MHz[4][IWL_RATE_COUNT] = { |
| {0, 0, 0, 0, 77, 0, 127, 160, 184, 220, 242, 250, 257}, /* Norm */ |
| {0, 0, 0, 0, 83, 0, 135, 169, 193, 229, 250, 257, 264}, /* SGI */ |
| {0, 0, 0, 0, 94, 0, 177, 249, 313, 423, 512, 550, 586}, /* AGG */ |
| {0, 0, 0, 0, 104, 0, 193, 270, 338, 454, 545, 584, 620}, /* AGG+SGI */ |
| }; |
| |
| static s32 expected_tpt_mimo2_20MHz[4][IWL_RATE_COUNT] = { |
| {0, 0, 0, 0, 74, 0, 123, 155, 179, 214, 236, 244, 251}, /* Norm */ |
| {0, 0, 0, 0, 81, 0, 131, 164, 188, 223, 243, 251, 257}, /* SGI */ |
| {0, 0, 0, 0, 89, 0, 167, 235, 296, 402, 488, 526, 560}, /* AGG */ |
| {0, 0, 0, 0, 97, 0, 182, 255, 320, 431, 520, 558, 593}, /* AGG+SGI*/ |
| }; |
| |
| static s32 expected_tpt_mimo2_40MHz[4][IWL_RATE_COUNT] = { |
| {0, 0, 0, 0, 123, 0, 182, 214, 235, 264, 279, 285, 289}, /* Norm */ |
| {0, 0, 0, 0, 131, 0, 191, 222, 242, 270, 284, 289, 293}, /* SGI */ |
| {0, 0, 0, 0, 171, 0, 305, 410, 496, 634, 731, 771, 805}, /* AGG */ |
| {0, 0, 0, 0, 186, 0, 329, 439, 527, 667, 764, 803, 838}, /* AGG+SGI */ |
| }; |
| |
| static s32 expected_tpt_mimo3_20MHz[4][IWL_RATE_COUNT] = { |
| {0, 0, 0, 0, 99, 0, 153, 186, 208, 239, 256, 263, 268}, /* Norm */ |
| {0, 0, 0, 0, 106, 0, 162, 194, 215, 246, 262, 268, 273}, /* SGI */ |
| {0, 0, 0, 0, 134, 0, 249, 346, 431, 574, 685, 732, 775}, /* AGG */ |
| {0, 0, 0, 0, 148, 0, 272, 376, 465, 614, 727, 775, 818}, /* AGG+SGI */ |
| }; |
| |
| static s32 expected_tpt_mimo3_40MHz[4][IWL_RATE_COUNT] = { |
| {0, 0, 0, 0, 152, 0, 211, 239, 255, 279, 290, 294, 297}, /* Norm */ |
| {0, 0, 0, 0, 160, 0, 219, 245, 261, 284, 294, 297, 300}, /* SGI */ |
| {0, 0, 0, 0, 254, 0, 443, 584, 695, 868, 984, 1030, 1070}, /* AGG */ |
| {0, 0, 0, 0, 277, 0, 478, 624, 737, 911, 1026, 1070, 1109}, /* AGG+SGI */ |
| }; |
| |
| /* mbps, mcs */ |
| static const struct iwl_rate_mcs_info iwl_rate_mcs[IWL_RATE_COUNT] = { |
| { "1", "BPSK DSSS"}, |
| { "2", "QPSK DSSS"}, |
| {"5.5", "BPSK CCK"}, |
| { "11", "QPSK CCK"}, |
| { "6", "BPSK 1/2"}, |
| { "9", "BPSK 1/2"}, |
| { "12", "QPSK 1/2"}, |
| { "18", "QPSK 3/4"}, |
| { "24", "16QAM 1/2"}, |
| { "36", "16QAM 3/4"}, |
| { "48", "64QAM 2/3"}, |
| { "54", "64QAM 3/4"}, |
| { "60", "64QAM 5/6"}, |
| }; |
| |
| #define MCS_INDEX_PER_STREAM (8) |
| |
| static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) |
| { |
| window->data = 0; |
| window->success_counter = 0; |
| window->success_ratio = IWL_INVALID_VALUE; |
| window->counter = 0; |
| window->average_tpt = IWL_INVALID_VALUE; |
| window->stamp = 0; |
| } |
| |
| static inline u8 rs_is_valid_ant(u8 valid_antenna, u8 ant_type) |
| { |
| return (ant_type & valid_antenna) == ant_type; |
| } |
| |
| /* |
| * removes the old data from the statistics. All data that is older than |
| * TID_MAX_TIME_DIFF, will be deleted. |
| */ |
| static void rs_tl_rm_old_stats(struct iwl_traffic_load *tl, u32 curr_time) |
| { |
| /* The oldest age we want to keep */ |
| u32 oldest_time = curr_time - TID_MAX_TIME_DIFF; |
| |
| while (tl->queue_count && |
| (tl->time_stamp < oldest_time)) { |
| tl->total -= tl->packet_count[tl->head]; |
| tl->packet_count[tl->head] = 0; |
| tl->time_stamp += TID_QUEUE_CELL_SPACING; |
| tl->queue_count--; |
| tl->head++; |
| if (tl->head >= TID_QUEUE_MAX_SIZE) |
| tl->head = 0; |
| } |
| } |
| |
| /* |
| * increment traffic load value for tid and also remove |
| * any old values if passed the certain time period |
| */ |
| static u8 rs_tl_add_packet(struct iwl_lq_sta *lq_data, |
| struct ieee80211_hdr *hdr) |
| { |
| u32 curr_time = jiffies_to_msecs(jiffies); |
| u32 time_diff; |
| s32 index; |
| struct iwl_traffic_load *tl = NULL; |
| u8 tid; |
| |
| if (ieee80211_is_data_qos(hdr->frame_control)) { |
| u8 *qc = ieee80211_get_qos_ctl(hdr); |
| tid = qc[0] & 0xf; |
| } else |
| return MAX_TID_COUNT; |
| |
| if (unlikely(tid >= TID_MAX_LOAD_COUNT)) |
| return MAX_TID_COUNT; |
| |
| tl = &lq_data->load[tid]; |
| |
| curr_time -= curr_time % TID_ROUND_VALUE; |
| |
| /* Happens only for the first packet. Initialize the data */ |
| if (!(tl->queue_count)) { |
| tl->total = 1; |
| tl->time_stamp = curr_time; |
| tl->queue_count = 1; |
| tl->head = 0; |
| tl->packet_count[0] = 1; |
| return MAX_TID_COUNT; |
| } |
| |
| time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); |
| index = time_diff / TID_QUEUE_CELL_SPACING; |
| |
| /* The history is too long: remove data that is older than */ |
| /* TID_MAX_TIME_DIFF */ |
| if (index >= TID_QUEUE_MAX_SIZE) |
| rs_tl_rm_old_stats(tl, curr_time); |
| |
| index = (tl->head + index) % TID_QUEUE_MAX_SIZE; |
| tl->packet_count[index] = tl->packet_count[index] + 1; |
| tl->total = tl->total + 1; |
| |
| if ((index + 1) > tl->queue_count) |
| tl->queue_count = index + 1; |
| |
| return tid; |
| } |
| |
| /* |
| get the traffic load value for tid |
| */ |
| static u32 rs_tl_get_load(struct iwl_lq_sta *lq_data, u8 tid) |
| { |
| u32 curr_time = jiffies_to_msecs(jiffies); |
| u32 time_diff; |
| s32 index; |
| struct iwl_traffic_load *tl = NULL; |
| |
| if (tid >= TID_MAX_LOAD_COUNT) |
| return 0; |
| |
| tl = &(lq_data->load[tid]); |
| |
| curr_time -= curr_time % TID_ROUND_VALUE; |
| |
| if (!(tl->queue_count)) |
| return 0; |
| |
| time_diff = TIME_WRAP_AROUND(tl->time_stamp, curr_time); |
| index = time_diff / TID_QUEUE_CELL_SPACING; |
| |
| /* The history is too long: remove data that is older than */ |
| /* TID_MAX_TIME_DIFF */ |
| if (index >= TID_QUEUE_MAX_SIZE) |
| rs_tl_rm_old_stats(tl, curr_time); |
| |
| return tl->total; |
| } |
| |
| static int rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_data, u8 tid, |
| struct ieee80211_sta *sta) |
| { |
| int ret = -EAGAIN; |
| u32 load; |
| |
| /* |
| * Don't create TX aggregation sessions when in high |
| * BT traffic, as they would just be disrupted by BT. |
| */ |
| if (priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) { |
| IWL_ERR(priv, "BT traffic (%d), no aggregation allowed\n", |
| priv->bt_traffic_load); |
| return ret; |
| } |
| |
| load = rs_tl_get_load(lq_data, tid); |
| |
| if (load > IWL_AGG_LOAD_THRESHOLD) { |
| IWL_DEBUG_HT(priv, "Starting Tx agg: STA: %pM tid: %d\n", |
| sta->addr, tid); |
| ret = ieee80211_start_tx_ba_session(sta, tid, 5000); |
| if (ret == -EAGAIN) { |
| /* |
| * driver and mac80211 is out of sync |
| * this might be cause by reloading firmware |
| * stop the tx ba session here |
| */ |
| IWL_ERR(priv, "Fail start Tx agg on tid: %d\n", |
| tid); |
| ieee80211_stop_tx_ba_session(sta, tid); |
| } |
| } else { |
| IWL_ERR(priv, "Aggregation not enabled for tid %d " |
| "because load = %u\n", tid, load); |
| } |
| return ret; |
| } |
| |
| static void rs_tl_turn_on_agg(struct iwl_priv *priv, u8 tid, |
| struct iwl_lq_sta *lq_data, |
| struct ieee80211_sta *sta) |
| { |
| if (tid < TID_MAX_LOAD_COUNT) |
| rs_tl_turn_on_agg_for_tid(priv, lq_data, tid, sta); |
| else |
| IWL_ERR(priv, "tid exceeds max load count: %d/%d\n", |
| tid, TID_MAX_LOAD_COUNT); |
| } |
| |
| static inline int get_num_of_ant_from_rate(u32 rate_n_flags) |
| { |
| return !!(rate_n_flags & RATE_MCS_ANT_A_MSK) + |
| !!(rate_n_flags & RATE_MCS_ANT_B_MSK) + |
| !!(rate_n_flags & RATE_MCS_ANT_C_MSK); |
| } |
| |
| /* |
| * Static function to get the expected throughput from an iwl_scale_tbl_info |
| * that wraps a NULL pointer check |
| */ |
| static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index) |
| { |
| if (tbl->expected_tpt) |
| return tbl->expected_tpt[rs_index]; |
| return 0; |
| } |
| |
| /** |
| * rs_collect_tx_data - Update the success/failure sliding window |
| * |
| * We keep a sliding window of the last 62 packets transmitted |
| * at this rate. window->data contains the bitmask of successful |
| * packets. |
| */ |
| static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl, |
| int scale_index, int attempts, int successes) |
| { |
| struct iwl_rate_scale_data *window = NULL; |
| static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); |
| s32 fail_count, tpt; |
| |
| if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) |
| return -EINVAL; |
| |
| /* Select window for current tx bit rate */ |
| window = &(tbl->win[scale_index]); |
| |
| /* Get expected throughput */ |
| tpt = get_expected_tpt(tbl, scale_index); |
| |
| /* |
| * Keep track of only the latest 62 tx frame attempts in this rate's |
| * history window; anything older isn't really relevant any more. |
| * If we have filled up the sliding window, drop the oldest attempt; |
| * if the oldest attempt (highest bit in bitmap) shows "success", |
| * subtract "1" from the success counter (this is the main reason |
| * we keep these bitmaps!). |
| */ |
| while (attempts > 0) { |
| if (window->counter >= IWL_RATE_MAX_WINDOW) { |
| |
| /* remove earliest */ |
| window->counter = IWL_RATE_MAX_WINDOW - 1; |
| |
| if (window->data & mask) { |
| window->data &= ~mask; |
| window->success_counter--; |
| } |
| } |
| |
| /* Increment frames-attempted counter */ |
| window->counter++; |
| |
| /* Shift bitmap by one frame to throw away oldest history */ |
| window->data <<= 1; |
| |
| /* Mark the most recent #successes attempts as successful */ |
| if (successes > 0) { |
| window->success_counter++; |
| window->data |= 0x1; |
| successes--; |
| } |
| |
| attempts--; |
| } |
| |
| /* Calculate current success ratio, avoid divide-by-0! */ |
| if (window->counter > 0) |
| window->success_ratio = 128 * (100 * window->success_counter) |
| / window->counter; |
| else |
| window->success_ratio = IWL_INVALID_VALUE; |
| |
| fail_count = window->counter - window->success_counter; |
| |
| /* Calculate average throughput, if we have enough history. */ |
| if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) || |
| (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH)) |
| window->average_tpt = (window->success_ratio * tpt + 64) / 128; |
| else |
| window->average_tpt = IWL_INVALID_VALUE; |
| |
| /* Tag this window as having been updated */ |
| window->stamp = jiffies; |
| |
| return 0; |
| } |
| |
| /* |
| * Fill uCode API rate_n_flags field, based on "search" or "active" table. |
| */ |
| /* FIXME:RS:remove this function and put the flags statically in the table */ |
| static u32 rate_n_flags_from_tbl(struct iwl_priv *priv, |
| struct iwl_scale_tbl_info *tbl, |
| int index, u8 use_green) |
| { |
| u32 rate_n_flags = 0; |
| |
| if (is_legacy(tbl->lq_type)) { |
| rate_n_flags = iwl_rates[index].plcp; |
| if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
| rate_n_flags |= RATE_MCS_CCK_MSK; |
| |
| } else if (is_Ht(tbl->lq_type)) { |
| if (index > IWL_LAST_OFDM_RATE) { |
| IWL_ERR(priv, "Invalid HT rate index %d\n", index); |
| index = IWL_LAST_OFDM_RATE; |
| } |
| rate_n_flags = RATE_MCS_HT_MSK; |
| |
| if (is_siso(tbl->lq_type)) |
| rate_n_flags |= iwl_rates[index].plcp_siso; |
| else if (is_mimo2(tbl->lq_type)) |
| rate_n_flags |= iwl_rates[index].plcp_mimo2; |
| else |
| rate_n_flags |= iwl_rates[index].plcp_mimo3; |
| } else { |
| IWL_ERR(priv, "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; |
| IWL_ERR(priv, "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 rs_get_tbl_info_from_mcs(const u32 rate_n_flags, |
| enum ieee80211_band band, |
| struct iwl_scale_tbl_info *tbl, |
| int *rate_idx) |
| { |
| u32 ant_msk = (rate_n_flags & RATE_MCS_ANT_ABC_MSK); |
| u8 num_of_ant = get_num_of_ant_from_rate(rate_n_flags); |
| u8 mcs; |
| |
| memset(tbl, 0, sizeof(struct iwl_scale_tbl_info)); |
| *rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); |
| |
| if (*rate_idx == IWL_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 = IWL_MAX_SEARCH; |
| |
| /* legacy rate format */ |
| if (!(rate_n_flags & RATE_MCS_HT_MSK)) { |
| if (num_of_ant == 1) { |
| if (band == IEEE80211_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 = rs_extract_rate(rate_n_flags); |
| |
| /* SISO */ |
| if (mcs <= IWL_RATE_SISO_60M_PLCP) { |
| if (num_of_ant == 1) |
| tbl->lq_type = LQ_SISO; /*else NONE*/ |
| /* MIMO2 */ |
| } else if (mcs <= IWL_RATE_MIMO2_60M_PLCP) { |
| if (num_of_ant == 2) |
| tbl->lq_type = LQ_MIMO2; |
| /* MIMO3 */ |
| } else { |
| if (num_of_ant == 3) { |
| tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; |
| tbl->lq_type = LQ_MIMO3; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| /* switch to another antenna/antennas and return 1 */ |
| /* if no other valid antenna found, return 0 */ |
| static int rs_toggle_antenna(u32 valid_ant, u32 *rate_n_flags, |
| struct iwl_scale_tbl_info *tbl) |
| { |
| u8 new_ant_type; |
| |
| if (!tbl->ant_type || tbl->ant_type > ANT_ABC) |
| return 0; |
| |
| if (!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) && |
| !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 rs_use_green(struct ieee80211_sta *sta) |
| { |
| struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
| struct iwl_rxon_context *ctx = sta_priv->common.ctx; |
| |
| return (sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD) && |
| !(ctx->ht.non_gf_sta_present); |
| } |
| |
| /** |
| * rs_get_supported_rates - get the available rates |
| * |
| * if management frame or broadcast frame only return |
| * basic available rates. |
| * |
| */ |
| static u16 rs_get_supported_rates(struct iwl_lq_sta *lq_sta, |
| struct ieee80211_hdr *hdr, |
| enum iwl_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 if (is_mimo2(rate_type)) |
| return lq_sta->active_mimo2_rate; |
| else |
| return lq_sta->active_mimo3_rate; |
| } |
| } |
| |
| static u16 rs_get_adjacent_rate(struct iwl_priv *priv, u8 index, u16 rate_mask, |
| int rate_type) |
| { |
| u8 high = IWL_RATE_INVALID; |
| u8 low = IWL_RATE_INVALID; |
| |
| /* 802.11A or ht walks to the next literal adjacent rate in |
| * the rate table */ |
| if (is_a_band(rate_type) || !is_legacy(rate_type)) { |
| int i; |
| u32 mask; |
| |
| /* Find the previous rate that is in the rate mask */ |
| i = index - 1; |
| for (mask = (1 << i); i >= 0; i--, mask >>= 1) { |
| if (rate_mask & mask) { |
| low = i; |
| break; |
| } |
| } |
| |
| /* Find the next rate that is in the rate mask */ |
| i = index + 1; |
| for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) { |
| if (rate_mask & mask) { |
| high = i; |
| break; |
| } |
| } |
| |
| return (high << 8) | low; |
| } |
| |
| low = index; |
| while (low != IWL_RATE_INVALID) { |
| low = iwl_rates[low].prev_rs; |
| if (low == IWL_RATE_INVALID) |
| break; |
| if (rate_mask & (1 << low)) |
| break; |
| IWL_DEBUG_RATE(priv, "Skipping masked lower rate: %d\n", low); |
| } |
| |
| high = index; |
| while (high != IWL_RATE_INVALID) { |
| high = iwl_rates[high].next_rs; |
| if (high == IWL_RATE_INVALID) |
| break; |
| if (rate_mask & (1 << high)) |
| break; |
| IWL_DEBUG_RATE(priv, "Skipping masked higher rate: %d\n", high); |
| } |
| |
| return (high << 8) | low; |
| } |
| |
| static u32 rs_get_lower_rate(struct iwl_lq_sta *lq_sta, |
| struct iwl_scale_tbl_info *tbl, |
| u8 scale_index, u8 ht_possible) |
| { |
| s32 low; |
| u16 rate_mask; |
| u16 high_low; |
| u8 switch_to_legacy = 0; |
| u8 is_green = lq_sta->is_green; |
| struct iwl_priv *priv = 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_index)) { |
| switch_to_legacy = 1; |
| scale_index = rs_ht_to_legacy[scale_index]; |
| if (lq_sta->band == IEEE80211_BAND_5GHZ) |
| tbl->lq_type = LQ_A; |
| else |
| tbl->lq_type = LQ_G; |
| |
| if (num_of_ant(tbl->ant_type) > 1) |
| tbl->ant_type = |
| first_antenna(priv->hw_params.valid_tx_ant); |
| |
| tbl->is_ht40 = 0; |
| tbl->is_SGI = 0; |
| tbl->max_search = IWL_MAX_SEARCH; |
| } |
| |
| rate_mask = 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 == IEEE80211_BAND_5GHZ) |
| rate_mask = (u16)(rate_mask & |
| (lq_sta->supp_rates << IWL_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_index))) { |
| low = scale_index; |
| goto out; |
| } |
| |
| high_low = rs_get_adjacent_rate(lq_sta->drv, scale_index, rate_mask, |
| tbl->lq_type); |
| low = high_low & 0xff; |
| |
| if (low == IWL_RATE_INVALID) |
| low = scale_index; |
| |
| out: |
| return rate_n_flags_from_tbl(lq_sta->drv, tbl, low, is_green); |
| } |
| |
| /* |
| * Simple function to compare two rate scale table types |
| */ |
| static bool table_type_matches(struct iwl_scale_tbl_info *a, |
| struct iwl_scale_tbl_info *b) |
| { |
| return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) && |
| (a->is_SGI == b->is_SGI); |
| } |
| |
| static void rs_bt_update_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
| struct iwl_lq_sta *lq_sta) |
| { |
| struct iwl_scale_tbl_info *tbl; |
| bool full_concurrent = priv->bt_full_concurrent; |
| unsigned long flags; |
| |
| if (priv->bt_ant_couple_ok) { |
| /* |
| * Is there a need to switch between |
| * full concurrency and 3-wire? |
| */ |
| spin_lock_irqsave(&priv->lock, flags); |
| if (priv->bt_ci_compliance && priv->bt_ant_couple_ok) |
| full_concurrent = true; |
| else |
| full_concurrent = false; |
| spin_unlock_irqrestore(&priv->lock, flags); |
| } |
| if ((priv->bt_traffic_load != priv->last_bt_traffic_load) || |
| (priv->bt_full_concurrent != full_concurrent)) { |
| priv->bt_full_concurrent = full_concurrent; |
| |
| /* Update uCode's rate table. */ |
| tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
| rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
| iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); |
| |
| queue_work(priv->workqueue, &priv->bt_full_concurrency); |
| } |
| } |
| |
| /* |
| * mac80211 sends us Tx status |
| */ |
| static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband, |
| struct ieee80211_sta *sta, void *priv_sta, |
| struct sk_buff *skb) |
| { |
| int legacy_success; |
| int retries; |
| int rs_index, mac_index, i; |
| struct iwl_lq_sta *lq_sta = priv_sta; |
| struct iwl_link_quality_cmd *table; |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| struct iwl_priv *priv = (struct iwl_priv *)priv_r; |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| enum mac80211_rate_control_flags mac_flags; |
| u32 tx_rate; |
| struct iwl_scale_tbl_info tbl_type; |
| struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl; |
| struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
| struct iwl_rxon_context *ctx = sta_priv->common.ctx; |
| |
| IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); |
| |
| /* Treat uninitialized rate scaling data same as non-existing. */ |
| if (!lq_sta) { |
| IWL_DEBUG_RATE(priv, "Station rate scaling not created yet.\n"); |
| return; |
| } else if (!lq_sta->drv) { |
| IWL_DEBUG_RATE(priv, "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); |
| rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, &rs_index); |
| if (priv->band == IEEE80211_BAND_5GHZ) |
| rs_index -= IWL_FIRST_OFDM_RATE; |
| mac_flags = info->status.rates[0].flags; |
| mac_index = info->status.rates[0].idx; |
| /* For HT packets, map MCS to PLCP */ |
| if (mac_flags & IEEE80211_TX_RC_MCS) { |
| mac_index &= RATE_MCS_CODE_MSK; /* Remove # of streams */ |
| if (mac_index >= (IWL_RATE_9M_INDEX - IWL_FIRST_OFDM_RATE)) |
| mac_index++; |
| /* |
| * mac80211 HT index is always zero-indexed; we need to move |
| * HT OFDM rates after CCK rates in 2.4 GHz band |
| */ |
| if (priv->band == IEEE80211_BAND_2GHZ) |
| mac_index += IWL_FIRST_OFDM_RATE; |
| } |
| /* Here we actually compare this rate to the latest LQ command */ |
| if ((mac_index < 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->antenna_sel_tx) || |
| (!!(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_index != mac_index)) { |
| IWL_DEBUG_RATE(priv, "initial rate %d does not match %d (0x%x)\n", mac_index, rs_index, tx_rate); |
| /* |
| * Since rates mis-match, the last LQ command may have failed. |
| * After IWL_MISSED_RATE_MAX mis-matches, resync the uCode with |
| * ... driver. |
| */ |
| lq_sta->missed_rate_counter++; |
| if (lq_sta->missed_rate_counter > IWL_MISSED_RATE_MAX) { |
| lq_sta->missed_rate_counter = 0; |
| iwl_send_lq_cmd(priv, ctx, &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 (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 (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 { |
| IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n"); |
| tmp_tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
| IWL_DEBUG_RATE(priv, "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]); |
| IWL_DEBUG_RATE(priv, "search- lq:%x, ant:%x, SGI:%d\n", |
| tmp_tbl->lq_type, tmp_tbl->ant_type, tmp_tbl->is_SGI); |
| IWL_DEBUG_RATE(priv, "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 |
| */ |
| rs_stay_in_table(lq_sta, true); |
| goto done; |
| } |
| |
| /* |
| * Updating the frame history depends on whether packets were |
| * aggregated. |
| * |
| * For aggregation, all packets were transmitted at the same rate, the |
| * first index into rate scale table. |
| */ |
| if (info->flags & IEEE80211_TX_STAT_AMPDU) { |
| tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); |
| rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, |
| &rs_index); |
| rs_collect_tx_data(curr_tbl, rs_index, |
| 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); |
| rs_get_tbl_info_from_mcs(tx_rate, priv->band, |
| &tbl_type, &rs_index); |
| /* |
| * Only collect stats if retried rate is in the same RS |
| * table as active/search. |
| */ |
| if (table_type_matches(&tbl_type, curr_tbl)) |
| tmp_tbl = curr_tbl; |
| else if (table_type_matches(&tbl_type, other_tbl)) |
| tmp_tbl = other_tbl; |
| else |
| continue; |
| rs_collect_tx_data(tmp_tbl, rs_index, 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 && sta->supp_rates[sband->band]) |
| rs_rate_scale_perform(priv, skb, sta, lq_sta); |
| |
| if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist) |
| rs_bt_update_lq(priv, ctx, 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 statistics. |
| * These control how long we stay using same modulation mode before |
| * searching for a new mode. |
| */ |
| static void rs_set_stay_in_table(struct iwl_priv *priv, u8 is_legacy, |
| struct iwl_lq_sta *lq_sta) |
| { |
| IWL_DEBUG_RATE(priv, "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 = IWL_LEGACY_TABLE_COUNT; |
| lq_sta->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; |
| lq_sta->max_success_limit = IWL_LEGACY_SUCCESS_LIMIT; |
| } else { |
| lq_sta->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
| lq_sta->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; |
| lq_sta->max_success_limit = IWL_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 rs_set_expected_tpt_table(struct iwl_lq_sta *lq_sta, |
| struct iwl_scale_tbl_info *tbl) |
| { |
| /* Used to choose among HT tables */ |
| s32 (*ht_tbl_pointer)[IWL_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/MIMO3), 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)) |
| ht_tbl_pointer = expected_tpt_mimo2_40MHz; |
| else if (is_mimo3(tbl->lq_type) && (!tbl->is_ht40 || lq_sta->is_dup)) |
| ht_tbl_pointer = expected_tpt_mimo3_20MHz; |
| else /* if (is_mimo3(tbl->lq_type)) <-- must be true */ |
| ht_tbl_pointer = expected_tpt_mimo3_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 rs_get_best_rate(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_sta, |
| struct iwl_scale_tbl_info *tbl, /* "search" */ |
| u16 rate_mask, s8 index) |
| { |
| /* "active" values */ |
| struct iwl_scale_tbl_info *active_tbl = |
| &(lq_sta->lq_info[lq_sta->active_tbl]); |
| s32 active_sr = active_tbl->win[index].success_ratio; |
| s32 active_tpt = active_tbl->expected_tpt[index]; |
| |
| /* expected "search" throughput */ |
| s32 *tpt_tbl = tbl->expected_tpt; |
| |
| s32 new_rate, high, low, start_hi; |
| u16 high_low; |
| s8 rate = index; |
| |
| new_rate = high = low = start_hi = IWL_RATE_INVALID; |
| |
| for (; ;) { |
| high_low = rs_get_adjacent_rate(priv, 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 > IWL_RATE_DECREASE_TH) && |
| (active_sr <= IWL_RATE_HIGH_TH) && |
| (tpt_tbl[rate] <= active_tpt))) || |
| ((active_sr >= IWL_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 != IWL_RATE_INVALID) { |
| new_rate = start_hi; |
| break; |
| } |
| |
| new_rate = rate; |
| |
| /* Loop again with lower rate */ |
| if (low != IWL_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 != IWL_RATE_INVALID) |
| break; |
| |
| /* Loop again with higher rate */ |
| else if (high != IWL_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 rs_switch_to_mimo2(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_sta, |
| struct ieee80211_conf *conf, |
| struct ieee80211_sta *sta, |
| struct iwl_scale_tbl_info *tbl, int index) |
| { |
| u16 rate_mask; |
| s32 rate; |
| s8 is_green = lq_sta->is_green; |
| struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
| struct iwl_rxon_context *ctx = sta_priv->common.ctx; |
| |
| if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
| return -1; |
| |
| if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
| == WLAN_HT_CAP_SM_PS_STATIC) |
| return -1; |
| |
| /* Need both Tx chains/antennas to support MIMO */ |
| if (priv->hw_params.tx_chains_num < 2) |
| return -1; |
| |
| IWL_DEBUG_RATE(priv, "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 = IWL_MAX_SEARCH; |
| rate_mask = lq_sta->active_mimo2_rate; |
| |
| if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) |
| tbl->is_ht40 = 1; |
| else |
| tbl->is_ht40 = 0; |
| |
| rs_set_expected_tpt_table(lq_sta, tbl); |
| |
| rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
| |
| IWL_DEBUG_RATE(priv, "LQ: MIMO2 best rate %d mask %X\n", rate, rate_mask); |
| if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
| IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", |
| rate, rate_mask); |
| return -1; |
| } |
| tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
| |
| IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
| tbl->current_rate, is_green); |
| return 0; |
| } |
| |
| /* |
| * Set up search table for MIMO3 |
| */ |
| static int rs_switch_to_mimo3(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_sta, |
| struct ieee80211_conf *conf, |
| struct ieee80211_sta *sta, |
| struct iwl_scale_tbl_info *tbl, int index) |
| { |
| u16 rate_mask; |
| s32 rate; |
| s8 is_green = lq_sta->is_green; |
| struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
| struct iwl_rxon_context *ctx = sta_priv->common.ctx; |
| |
| if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
| return -1; |
| |
| if (((sta->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >> 2) |
| == WLAN_HT_CAP_SM_PS_STATIC) |
| return -1; |
| |
| /* Need both Tx chains/antennas to support MIMO */ |
| if (priv->hw_params.tx_chains_num < 3) |
| return -1; |
| |
| IWL_DEBUG_RATE(priv, "LQ: try to switch to MIMO3\n"); |
| |
| tbl->lq_type = LQ_MIMO3; |
| tbl->is_dup = lq_sta->is_dup; |
| tbl->action = 0; |
| tbl->max_search = IWL_MAX_11N_MIMO3_SEARCH; |
| rate_mask = lq_sta->active_mimo3_rate; |
| |
| if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) |
| tbl->is_ht40 = 1; |
| else |
| tbl->is_ht40 = 0; |
| |
| rs_set_expected_tpt_table(lq_sta, tbl); |
| |
| rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
| |
| IWL_DEBUG_RATE(priv, "LQ: MIMO3 best rate %d mask %X\n", |
| rate, rate_mask); |
| if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
| IWL_DEBUG_RATE(priv, "Can't switch with index %d rate mask %x\n", |
| rate, rate_mask); |
| return -1; |
| } |
| tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
| |
| IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
| tbl->current_rate, is_green); |
| return 0; |
| } |
| |
| /* |
| * Set up search table for SISO |
| */ |
| static int rs_switch_to_siso(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_sta, |
| struct ieee80211_conf *conf, |
| struct ieee80211_sta *sta, |
| struct iwl_scale_tbl_info *tbl, int index) |
| { |
| u16 rate_mask; |
| u8 is_green = lq_sta->is_green; |
| s32 rate; |
| struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
| struct iwl_rxon_context *ctx = sta_priv->common.ctx; |
| |
| if (!conf_is_ht(conf) || !sta->ht_cap.ht_supported) |
| return -1; |
| |
| IWL_DEBUG_RATE(priv, "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 = IWL_MAX_SEARCH; |
| rate_mask = lq_sta->active_siso_rate; |
| |
| if (iwl_is_ht40_tx_allowed(priv, ctx, &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*/ |
| |
| rs_set_expected_tpt_table(lq_sta, tbl); |
| rate = rs_get_best_rate(priv, lq_sta, tbl, rate_mask, index); |
| |
| IWL_DEBUG_RATE(priv, "LQ: get best rate %d mask %X\n", rate, rate_mask); |
| if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
| IWL_DEBUG_RATE(priv, "can not switch with index %d rate mask %x\n", |
| rate, rate_mask); |
| return -1; |
| } |
| tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, rate, is_green); |
| IWL_DEBUG_RATE(priv, "LQ: Switch to new mcs %X index is green %X\n", |
| tbl->current_rate, is_green); |
| return 0; |
| } |
| |
| /* |
| * Try to switch to new modulation mode from legacy |
| */ |
| static int rs_move_legacy_other(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_sta, |
| struct ieee80211_conf *conf, |
| struct ieee80211_sta *sta, |
| int index) |
| { |
| struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
| struct iwl_scale_tbl_info *search_tbl = |
| &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
| struct iwl_rate_scale_data *window = &(tbl->win[index]); |
| u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
| (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); |
| u8 start_action; |
| u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
| u8 tx_chains_num = priv->hw_params.tx_chains_num; |
| int ret = 0; |
| u8 update_search_tbl_counter = 0; |
| |
| switch (priv->bt_traffic_load) { |
| case IWL_BT_COEX_TRAFFIC_LOAD_NONE: |
| /* nothing */ |
| break; |
| case IWL_BT_COEX_TRAFFIC_LOAD_LOW: |
| /* avoid antenna B unless MIMO */ |
| valid_tx_ant = first_antenna(priv->hw_params.valid_tx_ant); |
| if (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2) |
| tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
| break; |
| case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: |
| case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: |
| /* avoid antenna B and MIMO */ |
| valid_tx_ant = first_antenna(priv->hw_params.valid_tx_ant); |
| if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2 && |
| tbl->action != IWL_LEGACY_SWITCH_SISO) |
| tbl->action = IWL_LEGACY_SWITCH_SISO; |
| break; |
| default: |
| IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load); |
| break; |
| } |
| |
| if (!iwl_ht_enabled(priv)) |
| /* stay in Legacy */ |
| tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
| else if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
| tbl->action > IWL_LEGACY_SWITCH_SISO) |
| tbl->action = IWL_LEGACY_SWITCH_SISO; |
| |
| /* configure as 1x1 if bt full concurrency */ |
| if (priv->bt_full_concurrent) { |
| if (!iwl_ht_enabled(priv)) |
| tbl->action = IWL_LEGACY_SWITCH_ANTENNA1; |
| else if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2) |
| tbl->action = IWL_LEGACY_SWITCH_SISO; |
| valid_tx_ant = first_antenna(priv->hw_params.valid_tx_ant); |
| } |
| |
| start_action = tbl->action; |
| for (; ;) { |
| lq_sta->action_counter++; |
| switch (tbl->action) { |
| case IWL_LEGACY_SWITCH_ANTENNA1: |
| case IWL_LEGACY_SWITCH_ANTENNA2: |
| IWL_DEBUG_RATE(priv, "LQ: Legacy toggle Antenna\n"); |
| |
| if ((tbl->action == IWL_LEGACY_SWITCH_ANTENNA1 && |
| tx_chains_num <= 1) || |
| (tbl->action == IWL_LEGACY_SWITCH_ANTENNA2 && |
| tx_chains_num <= 2)) |
| break; |
| |
| /* Don't change antenna if success has been great */ |
| if (window->success_ratio >= IWL_RS_GOOD_RATIO && |
| !priv->bt_full_concurrent && |
| priv->bt_traffic_load == |
| IWL_BT_COEX_TRAFFIC_LOAD_NONE) |
| break; |
| |
| /* Set up search table to try other antenna */ |
| memcpy(search_tbl, tbl, sz); |
| |
| if (rs_toggle_antenna(valid_tx_ant, |
| &search_tbl->current_rate, search_tbl)) { |
| update_search_tbl_counter = 1; |
| rs_set_expected_tpt_table(lq_sta, search_tbl); |
| goto out; |
| } |
| break; |
| case IWL_LEGACY_SWITCH_SISO: |
| IWL_DEBUG_RATE(priv, "LQ: Legacy switch to SISO\n"); |
| |
| /* Set up search table to try SISO */ |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->is_SGI = 0; |
| ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
| search_tbl, index); |
| if (!ret) { |
| lq_sta->action_counter = 0; |
| goto out; |
| } |
| |
| break; |
| case IWL_LEGACY_SWITCH_MIMO2_AB: |
| case IWL_LEGACY_SWITCH_MIMO2_AC: |
| case IWL_LEGACY_SWITCH_MIMO2_BC: |
| IWL_DEBUG_RATE(priv, "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 == IWL_LEGACY_SWITCH_MIMO2_AB) |
| search_tbl->ant_type = ANT_AB; |
| else if (tbl->action == IWL_LEGACY_SWITCH_MIMO2_AC) |
| search_tbl->ant_type = ANT_AC; |
| else |
| search_tbl->ant_type = ANT_BC; |
| |
| if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) |
| break; |
| |
| ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
| search_tbl, index); |
| if (!ret) { |
| lq_sta->action_counter = 0; |
| goto out; |
| } |
| break; |
| |
| case IWL_LEGACY_SWITCH_MIMO3_ABC: |
| IWL_DEBUG_RATE(priv, "LQ: Legacy switch to MIMO3\n"); |
| |
| /* Set up search table to try MIMO3 */ |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->is_SGI = 0; |
| |
| search_tbl->ant_type = ANT_ABC; |
| |
| if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) |
| break; |
| |
| ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, |
| search_tbl, index); |
| if (!ret) { |
| lq_sta->action_counter = 0; |
| goto out; |
| } |
| break; |
| } |
| tbl->action++; |
| if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
| tbl->action = IWL_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 > IWL_LEGACY_SWITCH_MIMO3_ABC) |
| tbl->action = IWL_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 rs_move_siso_to_other(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_sta, |
| struct ieee80211_conf *conf, |
| struct ieee80211_sta *sta, int index) |
| { |
| u8 is_green = lq_sta->is_green; |
| struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
| struct iwl_scale_tbl_info *search_tbl = |
| &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
| struct iwl_rate_scale_data *window = &(tbl->win[index]); |
| struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
| u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
| (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); |
| u8 start_action; |
| u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
| u8 tx_chains_num = priv->hw_params.tx_chains_num; |
| u8 update_search_tbl_counter = 0; |
| int ret; |
| |
| switch (priv->bt_traffic_load) { |
| case IWL_BT_COEX_TRAFFIC_LOAD_NONE: |
| /* nothing */ |
| break; |
| case IWL_BT_COEX_TRAFFIC_LOAD_LOW: |
| /* avoid antenna B unless MIMO */ |
| valid_tx_ant = first_antenna(priv->hw_params.valid_tx_ant); |
| if (tbl->action == IWL_SISO_SWITCH_ANTENNA2) |
| tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
| break; |
| case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: |
| case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: |
| /* avoid antenna B and MIMO */ |
| valid_tx_ant = first_antenna(priv->hw_params.valid_tx_ant); |
| if (tbl->action != IWL_SISO_SWITCH_ANTENNA1) |
| tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
| break; |
| default: |
| IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load); |
| break; |
| } |
| |
| if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE && |
| tbl->action > IWL_SISO_SWITCH_ANTENNA2) { |
| /* stay in SISO */ |
| tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
| } |
| |
| /* configure as 1x1 if bt full concurrency */ |
| if (priv->bt_full_concurrent) { |
| valid_tx_ant = first_antenna(priv->hw_params.valid_tx_ant); |
| if (tbl->action >= IWL_LEGACY_SWITCH_ANTENNA2) |
| tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
| } |
| |
| start_action = tbl->action; |
| for (;;) { |
| lq_sta->action_counter++; |
| switch (tbl->action) { |
| case IWL_SISO_SWITCH_ANTENNA1: |
| case IWL_SISO_SWITCH_ANTENNA2: |
| IWL_DEBUG_RATE(priv, "LQ: SISO toggle Antenna\n"); |
| if ((tbl->action == IWL_SISO_SWITCH_ANTENNA1 && |
| tx_chains_num <= 1) || |
| (tbl->action == IWL_SISO_SWITCH_ANTENNA2 && |
| tx_chains_num <= 2)) |
| break; |
| |
| if (window->success_ratio >= IWL_RS_GOOD_RATIO && |
| !priv->bt_full_concurrent && |
| priv->bt_traffic_load == |
| IWL_BT_COEX_TRAFFIC_LOAD_NONE) |
| break; |
| |
| memcpy(search_tbl, tbl, sz); |
| if (rs_toggle_antenna(valid_tx_ant, |
| &search_tbl->current_rate, search_tbl)) { |
| update_search_tbl_counter = 1; |
| goto out; |
| } |
| break; |
| case IWL_SISO_SWITCH_MIMO2_AB: |
| case IWL_SISO_SWITCH_MIMO2_AC: |
| case IWL_SISO_SWITCH_MIMO2_BC: |
| IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO2\n"); |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->is_SGI = 0; |
| |
| if (tbl->action == IWL_SISO_SWITCH_MIMO2_AB) |
| search_tbl->ant_type = ANT_AB; |
| else if (tbl->action == IWL_SISO_SWITCH_MIMO2_AC) |
| search_tbl->ant_type = ANT_AC; |
| else |
| search_tbl->ant_type = ANT_BC; |
| |
| if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) |
| break; |
| |
| ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
| search_tbl, index); |
| if (!ret) |
| goto out; |
| break; |
| case IWL_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; |
| |
| IWL_DEBUG_RATE(priv, "LQ: SISO toggle SGI/NGI\n"); |
| |
| memcpy(search_tbl, tbl, sz); |
| if (is_green) { |
| if (!tbl->is_SGI) |
| break; |
| else |
| IWL_ERR(priv, |
| "SGI was set in GF+SISO\n"); |
| } |
| search_tbl->is_SGI = !tbl->is_SGI; |
| 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[index]) |
| break; |
| } |
| search_tbl->current_rate = |
| rate_n_flags_from_tbl(priv, search_tbl, |
| index, is_green); |
| update_search_tbl_counter = 1; |
| goto out; |
| case IWL_SISO_SWITCH_MIMO3_ABC: |
| IWL_DEBUG_RATE(priv, "LQ: SISO switch to MIMO3\n"); |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->is_SGI = 0; |
| search_tbl->ant_type = ANT_ABC; |
| |
| if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) |
| break; |
| |
| ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, |
| search_tbl, index); |
| if (!ret) |
| goto out; |
| break; |
| } |
| tbl->action++; |
| if (tbl->action > IWL_LEGACY_SWITCH_MIMO3_ABC) |
| tbl->action = IWL_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 > IWL_SISO_SWITCH_MIMO3_ABC) |
| tbl->action = IWL_SISO_SWITCH_ANTENNA1; |
| if (update_search_tbl_counter) |
| search_tbl->action = tbl->action; |
| |
| return 0; |
| } |
| |
| /* |
| * Try to switch to new modulation mode from MIMO2 |
| */ |
| static int rs_move_mimo2_to_other(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_sta, |
| struct ieee80211_conf *conf, |
| struct ieee80211_sta *sta, int index) |
| { |
| s8 is_green = lq_sta->is_green; |
| struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
| struct iwl_scale_tbl_info *search_tbl = |
| &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
| struct iwl_rate_scale_data *window = &(tbl->win[index]); |
| struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
| u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
| (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); |
| u8 start_action; |
| u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
| u8 tx_chains_num = priv->hw_params.tx_chains_num; |
| u8 update_search_tbl_counter = 0; |
| int ret; |
| |
| switch (priv->bt_traffic_load) { |
| case IWL_BT_COEX_TRAFFIC_LOAD_NONE: |
| /* nothing */ |
| break; |
| case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: |
| case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: |
| /* avoid antenna B and MIMO */ |
| if (tbl->action != IWL_MIMO2_SWITCH_SISO_A) |
| tbl->action = IWL_MIMO2_SWITCH_SISO_A; |
| break; |
| case IWL_BT_COEX_TRAFFIC_LOAD_LOW: |
| /* avoid antenna B unless MIMO */ |
| if (tbl->action == IWL_MIMO2_SWITCH_SISO_B || |
| tbl->action == IWL_MIMO2_SWITCH_SISO_C) |
| tbl->action = IWL_MIMO2_SWITCH_SISO_A; |
| break; |
| default: |
| IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load); |
| break; |
| } |
| |
| if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
| (tbl->action < IWL_MIMO2_SWITCH_SISO_A || |
| tbl->action > IWL_MIMO2_SWITCH_SISO_C)) { |
| /* switch in SISO */ |
| tbl->action = IWL_MIMO2_SWITCH_SISO_A; |
| } |
| |
| /* configure as 1x1 if bt full concurrency */ |
| if (priv->bt_full_concurrent && |
| (tbl->action < IWL_MIMO2_SWITCH_SISO_A || |
| tbl->action > IWL_MIMO2_SWITCH_SISO_C)) |
| tbl->action = IWL_MIMO2_SWITCH_SISO_A; |
| |
| start_action = tbl->action; |
| for (;;) { |
| lq_sta->action_counter++; |
| switch (tbl->action) { |
| case IWL_MIMO2_SWITCH_ANTENNA1: |
| case IWL_MIMO2_SWITCH_ANTENNA2: |
| IWL_DEBUG_RATE(priv, "LQ: MIMO2 toggle Antennas\n"); |
| |
| if (tx_chains_num <= 2) |
| break; |
| |
| if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
| break; |
| |
| memcpy(search_tbl, tbl, sz); |
| if (rs_toggle_antenna(valid_tx_ant, |
| &search_tbl->current_rate, search_tbl)) { |
| update_search_tbl_counter = 1; |
| goto out; |
| } |
| break; |
| case IWL_MIMO2_SWITCH_SISO_A: |
| case IWL_MIMO2_SWITCH_SISO_B: |
| case IWL_MIMO2_SWITCH_SISO_C: |
| IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to SISO\n"); |
| |
| /* Set up new search table for SISO */ |
| memcpy(search_tbl, tbl, sz); |
| |
| if (tbl->action == IWL_MIMO2_SWITCH_SISO_A) |
| search_tbl->ant_type = ANT_A; |
| else if (tbl->action == IWL_MIMO2_SWITCH_SISO_B) |
| search_tbl->ant_type = ANT_B; |
| else |
| search_tbl->ant_type = ANT_C; |
| |
| if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) |
| break; |
| |
| ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
| search_tbl, index); |
| if (!ret) |
| goto out; |
| |
| break; |
| |
| case IWL_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; |
| |
| IWL_DEBUG_RATE(priv, "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; |
| rs_set_expected_tpt_table(lq_sta, search_tbl); |
| /* |
| * If active table already uses the fastest possible |
| * modulation (dual stream with short guard interval), |
| * and it's working well, there's no need to look |
| * for a better type of modulation! |
| */ |
| if (tbl->is_SGI) { |
| s32 tpt = lq_sta->last_tpt / 100; |
| if (tpt >= search_tbl->expected_tpt[index]) |
| break; |
| } |
| search_tbl->current_rate = |
| rate_n_flags_from_tbl(priv, search_tbl, |
| index, is_green); |
| update_search_tbl_counter = 1; |
| goto out; |
| |
| case IWL_MIMO2_SWITCH_MIMO3_ABC: |
| IWL_DEBUG_RATE(priv, "LQ: MIMO2 switch to MIMO3\n"); |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->is_SGI = 0; |
| search_tbl->ant_type = ANT_ABC; |
| |
| if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) |
| break; |
| |
| ret = rs_switch_to_mimo3(priv, lq_sta, conf, sta, |
| search_tbl, index); |
| if (!ret) |
| goto out; |
| |
| break; |
| } |
| tbl->action++; |
| if (tbl->action > IWL_MIMO2_SWITCH_MIMO3_ABC) |
| tbl->action = IWL_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 > IWL_MIMO2_SWITCH_MIMO3_ABC) |
| tbl->action = IWL_MIMO2_SWITCH_ANTENNA1; |
| if (update_search_tbl_counter) |
| search_tbl->action = tbl->action; |
| |
| return 0; |
| |
| } |
| |
| /* |
| * Try to switch to new modulation mode from MIMO3 |
| */ |
| static int rs_move_mimo3_to_other(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_sta, |
| struct ieee80211_conf *conf, |
| struct ieee80211_sta *sta, int index) |
| { |
| s8 is_green = lq_sta->is_green; |
| struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
| struct iwl_scale_tbl_info *search_tbl = |
| &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
| struct iwl_rate_scale_data *window = &(tbl->win[index]); |
| struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
| u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
| (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); |
| u8 start_action; |
| u8 valid_tx_ant = priv->hw_params.valid_tx_ant; |
| u8 tx_chains_num = priv->hw_params.tx_chains_num; |
| int ret; |
| u8 update_search_tbl_counter = 0; |
| |
| switch (priv->bt_traffic_load) { |
| case IWL_BT_COEX_TRAFFIC_LOAD_NONE: |
| /* nothing */ |
| break; |
| case IWL_BT_COEX_TRAFFIC_LOAD_HIGH: |
| case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS: |
| /* avoid antenna B and MIMO */ |
| if (tbl->action != IWL_MIMO3_SWITCH_SISO_A) |
| tbl->action = IWL_MIMO3_SWITCH_SISO_A; |
| break; |
| case IWL_BT_COEX_TRAFFIC_LOAD_LOW: |
| /* avoid antenna B unless MIMO */ |
| if (tbl->action == IWL_MIMO3_SWITCH_SISO_B || |
| tbl->action == IWL_MIMO3_SWITCH_SISO_C) |
| tbl->action = IWL_MIMO3_SWITCH_SISO_A; |
| break; |
| default: |
| IWL_ERR(priv, "Invalid BT load %d", priv->bt_traffic_load); |
| break; |
| } |
| |
| if ((iwl_tx_ant_restriction(priv) == IWL_ANT_OK_SINGLE) && |
| (tbl->action < IWL_MIMO3_SWITCH_SISO_A || |
| tbl->action > IWL_MIMO3_SWITCH_SISO_C)) { |
| /* switch in SISO */ |
| tbl->action = IWL_MIMO3_SWITCH_SISO_A; |
| } |
| |
| /* configure as 1x1 if bt full concurrency */ |
| if (priv->bt_full_concurrent && |
| (tbl->action < IWL_MIMO3_SWITCH_SISO_A || |
| tbl->action > IWL_MIMO3_SWITCH_SISO_C)) |
| tbl->action = IWL_MIMO3_SWITCH_SISO_A; |
| |
| start_action = tbl->action; |
| for (;;) { |
| lq_sta->action_counter++; |
| switch (tbl->action) { |
| case IWL_MIMO3_SWITCH_ANTENNA1: |
| case IWL_MIMO3_SWITCH_ANTENNA2: |
| IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle Antennas\n"); |
| |
| if (tx_chains_num <= 3) |
| break; |
| |
| if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
| break; |
| |
| memcpy(search_tbl, tbl, sz); |
| if (rs_toggle_antenna(valid_tx_ant, |
| &search_tbl->current_rate, search_tbl)) |
| goto out; |
| break; |
| case IWL_MIMO3_SWITCH_SISO_A: |
| case IWL_MIMO3_SWITCH_SISO_B: |
| case IWL_MIMO3_SWITCH_SISO_C: |
| IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to SISO\n"); |
| |
| /* Set up new search table for SISO */ |
| memcpy(search_tbl, tbl, sz); |
| |
| if (tbl->action == IWL_MIMO3_SWITCH_SISO_A) |
| search_tbl->ant_type = ANT_A; |
| else if (tbl->action == IWL_MIMO3_SWITCH_SISO_B) |
| search_tbl->ant_type = ANT_B; |
| else |
| search_tbl->ant_type = ANT_C; |
| |
| if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) |
| break; |
| |
| ret = rs_switch_to_siso(priv, lq_sta, conf, sta, |
| search_tbl, index); |
| if (!ret) |
| goto out; |
| |
| break; |
| |
| case IWL_MIMO3_SWITCH_MIMO2_AB: |
| case IWL_MIMO3_SWITCH_MIMO2_AC: |
| case IWL_MIMO3_SWITCH_MIMO2_BC: |
| IWL_DEBUG_RATE(priv, "LQ: MIMO3 switch to MIMO2\n"); |
| |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->is_SGI = 0; |
| if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AB) |
| search_tbl->ant_type = ANT_AB; |
| else if (tbl->action == IWL_MIMO3_SWITCH_MIMO2_AC) |
| search_tbl->ant_type = ANT_AC; |
| else |
| search_tbl->ant_type = ANT_BC; |
| |
| if (!rs_is_valid_ant(valid_tx_ant, search_tbl->ant_type)) |
| break; |
| |
| ret = rs_switch_to_mimo2(priv, lq_sta, conf, sta, |
| search_tbl, index); |
| if (!ret) |
| goto out; |
| |
| break; |
| |
| case IWL_MIMO3_SWITCH_GI: |
| if (!tbl->is_ht40 && !(ht_cap->cap & |
| IEEE80211_HT_CAP_SGI_20)) |
| break; |
| if (tbl->is_ht40 && !(ht_cap->cap & |
| IEEE80211_HT_CAP_SGI_40)) |
| break; |
| |
| IWL_DEBUG_RATE(priv, "LQ: MIMO3 toggle SGI/NGI\n"); |
| |
| /* Set up new search table for MIMO */ |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->is_SGI = !tbl->is_SGI; |
| rs_set_expected_tpt_table(lq_sta, search_tbl); |
| /* |
| * If active table already uses the fastest possible |
| * modulation (dual stream with short guard interval), |
| * and it's working well, there's no need to look |
| * for a better type of modulation! |
| */ |
| if (tbl->is_SGI) { |
| s32 tpt = lq_sta->last_tpt / 100; |
| if (tpt >= search_tbl->expected_tpt[index]) |
| break; |
| } |
| search_tbl->current_rate = |
| rate_n_flags_from_tbl(priv, search_tbl, |
| index, is_green); |
| update_search_tbl_counter = 1; |
| goto out; |
| } |
| tbl->action++; |
| if (tbl->action > IWL_MIMO3_SWITCH_GI) |
| tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; |
| |
| if (tbl->action == start_action) |
| break; |
| } |
| search_tbl->lq_type = LQ_NONE; |
| return 0; |
| out: |
| lq_sta->search_better_tbl = 1; |
| tbl->action++; |
| if (tbl->action > IWL_MIMO3_SWITCH_GI) |
| tbl->action = IWL_MIMO3_SWITCH_ANTENNA1; |
| if (update_search_tbl_counter) |
| search_tbl->action = tbl->action; |
| |
| return 0; |
| |
| } |
| |
| /* |
| * Check whether we should continue using same modulation mode, or |
| * begin search for a new mode, based on: |
| * 1) # tx successes or failures while using this mode |
| * 2) # times calling this function |
| * 3) elapsed time in this mode (not used, for now) |
| */ |
| static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search) |
| { |
| struct iwl_scale_tbl_info *tbl; |
| int i; |
| int active_tbl; |
| int flush_interval_passed = 0; |
| struct iwl_priv *priv; |
| |
| priv = 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 + |
| IWL_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))) { |
| IWL_DEBUG_RATE(priv, "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; |
| |
| IWL_DEBUG_RATE(priv, "LQ: stay in table clear win\n"); |
| for (i = 0; i < IWL_RATE_COUNT; i++) |
| rs_rate_scale_clear_window( |
| &(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 < IWL_RATE_COUNT; i++) |
| rs_rate_scale_clear_window(&(tbl->win[i])); |
| } |
| } |
| } |
| |
| /* |
| * setup rate table in uCode |
| * return rate_n_flags as used in the table |
| */ |
| static u32 rs_update_rate_tbl(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx, |
| struct iwl_lq_sta *lq_sta, |
| struct iwl_scale_tbl_info *tbl, |
| int index, u8 is_green) |
| { |
| u32 rate; |
| |
| /* Update uCode's rate table. */ |
| rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
| rs_fill_link_cmd(priv, lq_sta, rate); |
| iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_ASYNC, false); |
| |
| return rate; |
| } |
| |
| /* |
| * Do rate scaling and search for new modulation mode. |
| */ |
| static void rs_rate_scale_perform(struct iwl_priv *priv, |
| struct sk_buff *skb, |
| struct ieee80211_sta *sta, |
| struct iwl_lq_sta *lq_sta) |
| { |
| struct ieee80211_hw *hw = priv->hw; |
| struct ieee80211_conf *conf = &hw->conf; |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| int low = IWL_RATE_INVALID; |
| int high = IWL_RATE_INVALID; |
| int index; |
| int i; |
| struct iwl_rate_scale_data *window = NULL; |
| int current_tpt = IWL_INVALID_VALUE; |
| int low_tpt = IWL_INVALID_VALUE; |
| int high_tpt = IWL_INVALID_VALUE; |
| u32 fail_count; |
| s8 scale_action = 0; |
| u16 rate_mask; |
| u8 update_lq = 0; |
| struct iwl_scale_tbl_info *tbl, *tbl1; |
| u16 rate_scale_index_msk = 0; |
| u32 rate; |
| u8 is_green = 0; |
| u8 active_tbl = 0; |
| u8 done_search = 0; |
| u16 high_low; |
| s32 sr; |
| u8 tid = MAX_TID_COUNT; |
| struct iwl_tid_data *tid_data; |
| struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
| struct iwl_rxon_context *ctx = sta_priv->common.ctx; |
| |
| IWL_DEBUG_RATE(priv, "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; |
| |
| if (!sta || !lq_sta) |
| return; |
| |
| lq_sta->supp_rates = sta->supp_rates[lq_sta->band]; |
| |
| tid = rs_tl_add_packet(lq_sta, hdr); |
| if ((tid != MAX_TID_COUNT) && (lq_sta->tx_agg_tid_en & (1 << tid))) { |
| tid_data = &priv->stations[lq_sta->lq.sta_id].tid[tid]; |
| if (tid_data->agg.state == IWL_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 = rs_use_green(sta); |
| is_green = lq_sta->is_green; |
| |
| /* current tx rate */ |
| index = lq_sta->last_txrate_idx; |
| |
| IWL_DEBUG_RATE(priv, "Rate scale index %d for type %d\n", index, |
| tbl->lq_type); |
| |
| /* rates available for this association, and for modulation mode */ |
| rate_mask = rs_get_supported_rates(lq_sta, hdr, tbl->lq_type); |
| |
| IWL_DEBUG_RATE(priv, "mask 0x%04X\n", rate_mask); |
| |
| /* mask with station rate restriction */ |
| if (is_legacy(tbl->lq_type)) { |
| if (lq_sta->band == IEEE80211_BAND_5GHZ) |
| /* supp_rates has no CCK bits in A mode */ |
| rate_scale_index_msk = (u16) (rate_mask & |
| (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); |
| else |
| rate_scale_index_msk = (u16) (rate_mask & |
| lq_sta->supp_rates); |
| |
| } else |
| rate_scale_index_msk = rate_mask; |
| |
| if (!rate_scale_index_msk) |
| rate_scale_index_msk = rate_mask; |
| |
| if (!((1 << index) & rate_scale_index_msk)) { |
| IWL_ERR(priv, "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 */ |
| index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
| rate = rs_update_rate_tbl(priv, ctx, lq_sta, |
| tbl, index, is_green); |
| } |
| return; |
| } |
| |
| /* Get expected throughput table and history window for current rate */ |
| if (!tbl->expected_tpt) { |
| IWL_ERR(priv, "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 < index)) { |
| index = lq_sta->max_rate_idx; |
| update_lq = 1; |
| window = &(tbl->win[index]); |
| goto lq_update; |
| } |
| |
| window = &(tbl->win[index]); |
| |
| /* |
| * If there is not enough history to calculate actual average |
| * throughput, keep analyzing results of more tx frames, without |
| * changing rate or mode (bypass most of the rest of this function). |
| * Set up new rate table in uCode only if old rate is not supported |
| * in current association (use new rate found above). |
| */ |
| fail_count = window->counter - window->success_counter; |
| if ((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
| (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) { |
| IWL_DEBUG_RATE(priv, "LQ: still below TH. succ=%d total=%d " |
| "for index %d\n", |
| window->success_counter, window->counter, index); |
| |
| /* Can't calculate this yet; not enough history */ |
| window->average_tpt = IWL_INVALID_VALUE; |
| |
| /* Should we stay with this modulation mode, |
| * or search for a new one? */ |
| rs_stay_in_table(lq_sta, false); |
| |
| goto out; |
| } |
| /* Else we have enough samples; calculate estimate of |
| * actual average throughput */ |
| if (window->average_tpt != ((window->success_ratio * |
| tbl->expected_tpt[index] + 64) / 128)) { |
| IWL_ERR(priv, "expected_tpt should have been calculated by now\n"); |
| window->average_tpt = ((window->success_ratio * |
| tbl->expected_tpt[index] + 64) / 128); |
| } |
| |
| /* If we are searching for better modulation mode, check success. */ |
| if (lq_sta->search_better_tbl && |
| (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI)) { |
| /* If good success, continue using the "search" mode; |
| * no need to send new link quality command, since we're |
| * continuing to use the setup that we've been trying. */ |
| if (window->average_tpt > lq_sta->last_tpt) { |
| |
| IWL_DEBUG_RATE(priv, "LQ: SWITCHING TO NEW TABLE " |
| "suc=%d cur-tpt=%d old-tpt=%d\n", |
| window->success_ratio, |
| window->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 = window->average_tpt; |
| |
| /* Else poor success; go back to mode in "active" table */ |
| } else { |
| |
| IWL_DEBUG_RATE(priv, "LQ: GOING BACK TO THE OLD TABLE " |
| "suc=%d cur-tpt=%d old-tpt=%d\n", |
| window->success_ratio, |
| window->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 */ |
| index = iwl_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 = rs_get_adjacent_rate(priv, index, rate_scale_index_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 = IWL_RATE_INVALID; |
| |
| sr = window->success_ratio; |
| |
| /* Collect measured throughputs for current and adjacent rates */ |
| current_tpt = window->average_tpt; |
| if (low != IWL_RATE_INVALID) |
| low_tpt = tbl->win[low].average_tpt; |
| if (high != IWL_RATE_INVALID) |
| high_tpt = tbl->win[high].average_tpt; |
| |
| scale_action = 0; |
| |
| /* Too many failures, decrease rate */ |
| if ((sr <= IWL_RATE_DECREASE_TH) || (current_tpt == 0)) { |
| IWL_DEBUG_RATE(priv, "decrease rate because of low success_ratio\n"); |
| scale_action = -1; |
| |
| /* No throughput measured yet for adjacent rates; try increase. */ |
| } else if ((low_tpt == IWL_INVALID_VALUE) && |
| (high_tpt == IWL_INVALID_VALUE)) { |
| |
| if (high != IWL_RATE_INVALID && sr >= IWL_RATE_INCREASE_TH) |
| scale_action = 1; |
| else if (low != IWL_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 != IWL_INVALID_VALUE) && |
| (high_tpt != IWL_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 != IWL_INVALID_VALUE) { |
| /* Higher rate has better throughput */ |
| if (high_tpt > current_tpt && |
| sr >= IWL_RATE_INCREASE_TH) { |
| scale_action = 1; |
| } else { |
| scale_action = 0; |
| } |
| |
| /* Lower adjacent rate's throughput is measured */ |
| } else if (low_tpt != IWL_INVALID_VALUE) { |
| /* Lower rate has better throughput */ |
| if (low_tpt > current_tpt) { |
| IWL_DEBUG_RATE(priv, |
| "decrease rate because of low tpt\n"); |
| scale_action = -1; |
| } else if (sr >= IWL_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 != IWL_RATE_INVALID) && |
| ((sr > IWL_RATE_HIGH_TH) || |
| (current_tpt > (100 * tbl->expected_tpt[low])))) |
| scale_action = 0; |
| if (!iwl_ht_enabled(priv) && !is_legacy(tbl->lq_type)) |
| scale_action = -1; |
| if (iwl_tx_ant_restriction(priv) != IWL_ANT_OK_MULTI && |
| (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) |
| scale_action = -1; |
| |
| if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) && |
| (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) { |
| if (lq_sta->last_bt_traffic > priv->bt_traffic_load) { |
| /* |
| * don't set scale_action, don't want to scale up if |
| * the rate scale doesn't otherwise think that is a |
| * good idea. |
| */ |
| } else if (lq_sta->last_bt_traffic <= priv->bt_traffic_load) { |
| scale_action = -1; |
| } |
| } |
| lq_sta->last_bt_traffic = priv->bt_traffic_load; |
| |
| if ((priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) && |
| (is_mimo2(tbl->lq_type) || is_mimo3(tbl->lq_type))) { |
| /* search for a new modulation */ |
| rs_stay_in_table(lq_sta, true); |
| goto lq_update; |
| } |
| |
| switch (scale_action) { |
| case -1: |
| /* Decrease starting rate, update uCode's rate table */ |
| if (low != IWL_RATE_INVALID) { |
| update_lq = 1; |
| index = low; |
| } |
| |
| break; |
| case 1: |
| /* Increase starting rate, update uCode's rate table */ |
| if (high != IWL_RATE_INVALID) { |
| update_lq = 1; |
| index = high; |
| } |
| |
| break; |
| case 0: |
| /* No change */ |
| default: |
| break; |
| } |
| |
| IWL_DEBUG_RATE(priv, "choose rate scale index %d action %d low %d " |
| "high %d type %d\n", |
| index, scale_action, low, high, tbl->lq_type); |
| |
| lq_update: |
| /* Replace uCode's rate table for the destination station. */ |
| if (update_lq) |
| rate = rs_update_rate_tbl(priv, ctx, lq_sta, |
| tbl, index, is_green); |
| |
| if (iwl_tx_ant_restriction(priv) == IWL_ANT_OK_MULTI) { |
| /* Should we stay with this modulation mode, |
| * or search for a new one? */ |
| 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 && window->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)) |
| rs_move_legacy_other(priv, lq_sta, conf, sta, index); |
| else if (is_siso(tbl->lq_type)) |
| rs_move_siso_to_other(priv, lq_sta, conf, sta, index); |
| else if (is_mimo2(tbl->lq_type)) |
| rs_move_mimo2_to_other(priv, lq_sta, conf, sta, index); |
| else |
| rs_move_mimo3_to_other(priv, lq_sta, conf, sta, index); |
| |
| /* If new "search" mode was selected, set up in uCode table */ |
| if (lq_sta->search_better_tbl) { |
| /* Access the "search" table, clear its history. */ |
| tbl = &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); |
| for (i = 0; i < IWL_RATE_COUNT; i++) |
| rs_rate_scale_clear_window(&(tbl->win[i])); |
| |
| /* Use new "search" start rate */ |
| index = iwl_hwrate_to_plcp_idx(tbl->current_rate); |
| |
| IWL_DEBUG_RATE(priv, "Switch current mcs: %X index: %d\n", |
| tbl->current_rate, index); |
| rs_fill_link_cmd(priv, lq_sta, tbl->current_rate); |
| iwl_send_lq_cmd(priv, ctx, &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) { |
| IWL_DEBUG_RATE(priv, "LQ: STAY in legacy table\n"); |
| rs_set_stay_in_table(priv, 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) && |
| iwl_ht_enabled(priv)) { |
| if ((lq_sta->last_tpt > IWL_AGG_TPT_THREHOLD) && |
| (lq_sta->tx_agg_tid_en & (1 << tid)) && |
| (tid != MAX_TID_COUNT)) { |
| tid_data = |
| &priv->stations[lq_sta->lq.sta_id].tid[tid]; |
| if (tid_data->agg.state == IWL_AGG_OFF) { |
| IWL_DEBUG_RATE(priv, |
| "try to aggregate tid %d\n", |
| tid); |
| rs_tl_turn_on_agg(priv, tid, |
| lq_sta, sta); |
| } |
| } |
| rs_set_stay_in_table(priv, 0, lq_sta); |
| } |
| } |
| |
| out: |
| tbl->current_rate = rate_n_flags_from_tbl(priv, tbl, index, is_green); |
| i = index; |
| lq_sta->last_txrate_idx = i; |
| } |
| |
| /** |
| * rs_initialize_lq - Initialize a station's hardware rate table |
| * |
| * The uCode's station table contains a table of fallback rates |
| * for automatic fallback during transmission. |
| * |
| * NOTE: This sets up a default set of values. These will be replaced later |
| * if the driver's iwl-agn-rs rate scaling algorithm is used, instead of |
| * rc80211_simple. |
| * |
| * NOTE: Run REPLY_ADD_STA command to set up station table entry, before |
| * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD, |
| * which requires station table entry to exist). |
| */ |
| static void rs_initialize_lq(struct iwl_priv *priv, |
| struct ieee80211_conf *conf, |
| struct ieee80211_sta *sta, |
| struct iwl_lq_sta *lq_sta) |
| { |
| struct iwl_scale_tbl_info *tbl; |
| int rate_idx; |
| int i; |
| u32 rate; |
| u8 use_green = rs_use_green(sta); |
| u8 active_tbl = 0; |
| u8 valid_tx_ant; |
| struct iwl_station_priv *sta_priv; |
| struct iwl_rxon_context *ctx; |
| |
| if (!sta || !lq_sta) |
| return; |
| |
| sta_priv = (void *)sta->drv_priv; |
| ctx = sta_priv->common.ctx; |
| |
| i = lq_sta->last_txrate_idx; |
| |
| valid_tx_ant = priv->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 >= IWL_RATE_COUNT)) |
| i = 0; |
| |
| rate = iwl_rates[i].plcp; |
| tbl->ant_type = first_antenna(valid_tx_ant); |
| rate |= tbl->ant_type << RATE_MCS_ANT_POS; |
| |
| if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) |
| rate |= RATE_MCS_CCK_MSK; |
| |
| rs_get_tbl_info_from_mcs(rate, priv->band, tbl, &rate_idx); |
| if (!rs_is_valid_ant(valid_tx_ant, tbl->ant_type)) |
| rs_toggle_antenna(valid_tx_ant, &rate, tbl); |
| |
| rate = rate_n_flags_from_tbl(priv, tbl, rate_idx, use_green); |
| tbl->current_rate = rate; |
| rs_set_expected_tpt_table(lq_sta, tbl); |
| rs_fill_link_cmd(NULL, lq_sta, rate); |
| priv->stations[lq_sta->lq.sta_id].lq = &lq_sta->lq; |
| iwl_send_lq_cmd(priv, ctx, &lq_sta->lq, CMD_SYNC, true); |
| } |
| |
| static void rs_get_rate(void *priv_r, struct ieee80211_sta *sta, void *priv_sta, |
| struct ieee80211_tx_rate_control *txrc) |
| { |
| |
| struct sk_buff *skb = txrc->skb; |
| struct ieee80211_supported_band *sband = txrc->sband; |
| struct iwl_priv *priv __maybe_unused = (struct iwl_priv *)priv_r; |
| struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| struct iwl_lq_sta *lq_sta = priv_sta; |
| int rate_idx; |
| |
| IWL_DEBUG_RATE_LIMIT(priv, "rate scale calculate new rate for skb\n"); |
| |
| /* Get max rate if user set max rate */ |
| if (lq_sta) { |
| lq_sta->max_rate_idx = txrc->max_rate_idx; |
| if ((sband->band == IEEE80211_BAND_5GHZ) && |
| (lq_sta->max_rate_idx != -1)) |
| lq_sta->max_rate_idx += IWL_FIRST_OFDM_RATE; |
| if ((lq_sta->max_rate_idx < 0) || |
| (lq_sta->max_rate_idx >= IWL_RATE_COUNT)) |
| lq_sta->max_rate_idx = -1; |
| } |
| |
| /* Treat uninitialized rate scaling data same as non-existing. */ |
| if (lq_sta && !lq_sta->drv) { |
| IWL_DEBUG_RATE(priv, "Rate scaling not initialized yet.\n"); |
| priv_sta = NULL; |
| } |
| |
| /* Send management frames and NO_ACK data using lowest rate. */ |
| if (rate_control_send_low(sta, priv_sta, txrc)) |
| return; |
| |
| rate_idx = lq_sta->last_txrate_idx; |
| |
| if (lq_sta->last_rate_n_flags & RATE_MCS_HT_MSK) { |
| rate_idx -= IWL_FIRST_OFDM_RATE; |
| /* 6M and 9M shared same MCS index */ |
| rate_idx = (rate_idx > 0) ? (rate_idx - 1) : 0; |
| if (rs_extract_rate(lq_sta->last_rate_n_flags) >= |
| IWL_RATE_MIMO3_6M_PLCP) |
| rate_idx = rate_idx + (2 * MCS_INDEX_PER_STREAM); |
| else if (rs_extract_rate(lq_sta->last_rate_n_flags) >= |
| IWL_RATE_MIMO2_6M_PLCP) |
| rate_idx = rate_idx + MCS_INDEX_PER_STREAM; |
| info->control.rates[0].flags = IEEE80211_TX_RC_MCS; |
| if (lq_sta->last_rate_n_flags & RATE_MCS_SGI_MSK) |
| info->control.rates[0].flags |= IEEE80211_TX_RC_SHORT_GI; |
| if (lq_sta->last_rate_n_flags & RATE_MCS_DUP_MSK) |
| info->control.rates[0].flags |= IEEE80211_TX_RC_DUP_DATA; |
| if (lq_sta->last_rate_n_flags & RATE_MCS_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 >= IWL_RATE_COUNT_LEGACY) || |
| ((sband->band == IEEE80211_BAND_5GHZ) && |
| (rate_idx < IWL_FIRST_OFDM_RATE))) |
| rate_idx = rate_lowest_index(sband, sta); |
| /* On valid 5 GHz rate, adjust index */ |
| else if (sband->band == IEEE80211_BAND_5GHZ) |
| rate_idx -= IWL_FIRST_OFDM_RATE; |
| info->control.rates[0].flags = 0; |
| } |
| info->control.rates[0].idx = rate_idx; |
| |
| } |
| |
| static void *rs_alloc_sta(void *priv_rate, struct ieee80211_sta *sta, |
| gfp_t gfp) |
| { |
| struct iwl_station_priv *sta_priv = (struct iwl_station_priv *) sta->drv_priv; |
| struct iwl_priv *priv; |
| |
| priv = (struct iwl_priv *)priv_rate; |
| IWL_DEBUG_RATE(priv, "create station rate scale window\n"); |
| |
| return &sta_priv->lq_sta; |
| } |
| |
| /* |
| * Called after adding a new station to initialize rate scaling |
| */ |
| void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta, u8 sta_id) |
| { |
| int i, j; |
| struct ieee80211_hw *hw = priv->hw; |
| struct ieee80211_conf *conf = &priv->hw->conf; |
| struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
| struct iwl_station_priv *sta_priv; |
| struct iwl_lq_sta *lq_sta; |
| struct ieee80211_supported_band *sband; |
| |
| sta_priv = (struct iwl_station_priv *) sta->drv_priv; |
| lq_sta = &sta_priv->lq_sta; |
| sband = hw->wiphy->bands[conf->channel->band]; |
| |
| |
| lq_sta->lq.sta_id = sta_id; |
| |
| for (j = 0; j < LQ_SIZE; j++) |
| for (i = 0; i < IWL_RATE_COUNT; i++) |
| rs_rate_scale_clear_window(&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 < IWL_RATE_COUNT; i++) |
| rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]); |
| |
| IWL_DEBUG_RATE(priv, "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 = IWL_MISSED_RATE_MAX; |
| lq_sta->is_green = rs_use_green(sta); |
| lq_sta->active_legacy_rate = priv->active_rate & ~(0x1000); |
| lq_sta->band = priv->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 <<= IWL_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 <<= IWL_FIRST_OFDM_RATE; |
| |
| lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1; |
| lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1; |
| lq_sta->active_mimo3_rate &= ~((u16)0x2); |
| lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE; |
| |
| IWL_DEBUG_RATE(priv, "SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n", |
| lq_sta->active_siso_rate, |
| lq_sta->active_mimo2_rate, |
| lq_sta->active_mimo3_rate); |
| |
| /* These values will be overridden later */ |
| lq_sta->lq.general_params.single_stream_ant_msk = |
| first_antenna(priv->hw_params.valid_tx_ant); |
| lq_sta->lq.general_params.dual_stream_ant_msk = |
| priv->hw_params.valid_tx_ant & |
| ~first_antenna(priv->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 (num_of_ant(priv->hw_params.valid_tx_ant) == 2) { |
| lq_sta->lq.general_params.dual_stream_ant_msk = |
| priv->hw_params.valid_tx_ant; |
| } |
| |
| /* as default allow aggregation for all tids */ |
| lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID; |
| lq_sta->drv = priv; |
| |
| /* Set last_txrate_idx to lowest rate */ |
| lq_sta->last_txrate_idx = rate_lowest_index(sband, sta); |
| if (sband->band == IEEE80211_BAND_5GHZ) |
| lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE; |
| lq_sta->is_agg = 0; |
| |
| #ifdef CONFIG_MAC80211_DEBUGFS |
| lq_sta->dbg_fixed_rate = 0; |
| #endif |
| |
| rs_initialize_lq(priv, conf, sta, lq_sta); |
| } |
| |
| static void rs_fill_link_cmd(struct iwl_priv *priv, |
| struct iwl_lq_sta *lq_sta, u32 new_rate) |
| { |
| struct iwl_scale_tbl_info tbl_type; |
| int index = 0; |
| int rate_idx; |
| int repeat_rate = 0; |
| u8 ant_toggle_cnt = 0; |
| u8 use_ht_possible = 1; |
| u8 valid_tx_ant = 0; |
| struct iwl_station_priv *sta_priv = |
| container_of(lq_sta, struct iwl_station_priv, lq_sta); |
| struct iwl_link_quality_cmd *lq_cmd = &lq_sta->lq; |
| |
| /* Override starting rate (index 0) if needed for debug purposes */ |
| rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
| |
| /* Interpret new_rate (rate_n_flags) */ |
| rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, |
| &tbl_type, &rate_idx); |
| |
| if (priv && priv->bt_full_concurrent) { |
| /* 1x1 only */ |
| tbl_type.ant_type = |
| first_antenna(priv->hw_params.valid_tx_ant); |
| } |
| |
| /* How many times should we repeat the initial rate? */ |
| if (is_legacy(tbl_type.lq_type)) { |
| ant_toggle_cnt = 1; |
| repeat_rate = IWL_NUMBER_TRY; |
| } else { |
| repeat_rate = min(IWL_HT_NUMBER_TRY, |
| LINK_QUAL_AGG_DISABLE_START_DEF - 1); |
| } |
| |
| lq_cmd->general_params.mimo_delimiter = |
| is_mimo(tbl_type.lq_type) ? 1 : 0; |
| |
| /* Fill 1st table entry (index 0) */ |
| lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
| |
| if (num_of_ant(tbl_type.ant_type) == 1) { |
| lq_cmd->general_params.single_stream_ant_msk = |
| tbl_type.ant_type; |
| } else if (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 */ |
| |
| index++; |
| repeat_rate--; |
| if (priv) { |
| if (priv->bt_full_concurrent) |
| valid_tx_ant = ANT_A; |
| else |
| valid_tx_ant = priv->hw_params.valid_tx_ant; |
| } |
| |
| /* Fill rest of rate table */ |
| while (index < LINK_QUAL_MAX_RETRY_NUM) { |
| /* Repeat initial/next rate. |
| * For legacy IWL_NUMBER_TRY == 1, this loop will not execute. |
| * For HT IWL_HT_NUMBER_TRY == 3, this executes twice. */ |
| while (repeat_rate > 0 && (index < 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 (priv && |
| rs_toggle_antenna(valid_tx_ant, |
| &new_rate, &tbl_type)) |
| ant_toggle_cnt = 1; |
| } |
| |
| /* Override next rate if needed for debug purposes */ |
| rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
| |
| /* Fill next table entry */ |
| lq_cmd->rs_table[index].rate_n_flags = |
| cpu_to_le32(new_rate); |
| repeat_rate--; |
| index++; |
| } |
| |
| rs_get_tbl_info_from_mcs(new_rate, lq_sta->band, &tbl_type, |
| &rate_idx); |
| |
| if (priv && priv->bt_full_concurrent) { |
| /* 1x1 only */ |
| tbl_type.ant_type = |
| first_antenna(priv->hw_params.valid_tx_ant); |
| } |
| |
| /* Indicate to uCode which entries might be MIMO. |
| * If initial rate was MIMO, this will finally end up |
| * as (IWL_HT_NUMBER_TRY * 2), after 2nd pass, otherwise 0. */ |
| if (is_mimo(tbl_type.lq_type)) |
| lq_cmd->general_params.mimo_delimiter = index; |
| |
| /* Get next rate */ |
| new_rate = 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 (priv && |
| rs_toggle_antenna(valid_tx_ant, |
| &new_rate, &tbl_type)) |
| ant_toggle_cnt = 1; |
| |
| repeat_rate = IWL_NUMBER_TRY; |
| } else { |
| repeat_rate = IWL_HT_NUMBER_TRY; |
| } |
| |
| /* Don't allow HT rates after next pass. |
| * 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 */ |
| rs_dbgfs_set_mcs(lq_sta, &new_rate, index); |
| |
| /* Fill next table entry */ |
| lq_cmd->rs_table[index].rate_n_flags = cpu_to_le32(new_rate); |
| |
| index++; |
| repeat_rate--; |
| } |
| |
| lq_cmd->agg_params.agg_frame_cnt_limit = |
| sta_priv->max_agg_bufsize ?: 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); |
| /* |
| * overwrite if needed, pass aggregation time limit |
| * to uCode in uSec |
| */ |
| if (priv && priv->cfg->bt_params && |
| priv->cfg->bt_params->agg_time_limit && |
| priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH) |
| lq_cmd->agg_params.agg_time_limit = |
| cpu_to_le16(priv->cfg->bt_params->agg_time_limit); |
| } |
| |
| static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) |
| { |
| return hw->priv; |
| } |
| /* rate scale requires free function to be implemented */ |
| static void rs_free(void *priv_rate) |
| { |
| return; |
| } |
| |
| static void rs_free_sta(void *priv_r, struct ieee80211_sta *sta, |
| void *priv_sta) |
| { |
| struct iwl_priv *priv __maybe_unused = priv_r; |
| |
| IWL_DEBUG_RATE(priv, "enter\n"); |
| IWL_DEBUG_RATE(priv, "leave\n"); |
| } |
| |
| |
| #ifdef CONFIG_MAC80211_DEBUGFS |
| static int open_file_generic(struct inode *inode, struct file *file) |
| { |
| file->private_data = inode->i_private; |
| return 0; |
| } |
| static void rs_dbgfs_set_mcs(struct iwl_lq_sta *lq_sta, |
| u32 *rate_n_flags, int index) |
| { |
| struct iwl_priv *priv; |
| u8 valid_tx_ant; |
| u8 ant_sel_tx; |
| |
| priv = lq_sta->drv; |
| valid_tx_ant = priv->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; |
| IWL_DEBUG_RATE(priv, "Fixed rate ON\n"); |
| } else { |
| lq_sta->dbg_fixed_rate = 0; |
| IWL_ERR(priv, |
| "Invalid antenna selection 0x%X, Valid is 0x%X\n", |
| ant_sel_tx, valid_tx_ant); |
| IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
| } |
| } else { |
| IWL_DEBUG_RATE(priv, "Fixed rate OFF\n"); |
| } |
| } |
| |
| static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, |
| const char __user *user_buf, size_t count, loff_t *ppos) |
| { |
| struct iwl_lq_sta *lq_sta = file->private_data; |
| struct iwl_priv *priv; |
| char buf[64]; |
| int buf_size; |
| u32 parsed_rate; |
| struct iwl_station_priv *sta_priv = |
| container_of(lq_sta, struct iwl_station_priv, lq_sta); |
| struct iwl_rxon_context *ctx = sta_priv->common.ctx; |
| |
| priv = 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 */ |
| lq_sta->active_mimo3_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ |
| |
| IWL_DEBUG_RATE(priv, "sta_id %d rate 0x%X\n", |
| lq_sta->lq.sta_id, lq_sta->dbg_fixed_rate); |
| |
| if (lq_sta->dbg_fixed_rate) { |
| rs_fill_link_cmd(NULL, lq_sta, lq_sta->dbg_fixed_rate); |
| iwl_send_lq_cmd(lq_sta->drv, ctx, &lq_sta->lq, CMD_ASYNC, |
| false); |
| } |
| |
| return count; |
| } |
| |
| static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, |
| char __user *user_buf, size_t count, loff_t *ppos) |
| { |
| char *buff; |
| int desc = 0; |
| int i = 0; |
| int index = 0; |
| ssize_t ret; |
| |
| struct iwl_lq_sta *lq_sta = file->private_data; |
| struct iwl_priv *priv; |
| struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); |
| |
| priv = lq_sta->drv; |
| 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", |
| (priv->hw_params.valid_tx_ant & ANT_A) ? "ANT_A," : "", |
| (priv->hw_params.valid_tx_ant & ANT_B) ? "ANT_B," : "", |
| (priv->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" : |
| ((is_mimo2(tbl->lq_type)) ? "MIMO2" : "MIMO3")); |
| 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_index[0], |
| lq_sta->lq.general_params.start_rate_index[1], |
| lq_sta->lq.general_params.start_rate_index[2], |
| lq_sta->lq.general_params.start_rate_index[3]); |
| |
| for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
| index = iwl_hwrate_to_plcp_idx( |
| le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); |
| if (is_legacy(tbl->lq_type)) { |
| desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", |
| i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), |
| iwl_rate_mcs[index].mbps); |
| } else { |
| desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps (%s)\n", |
| i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags), |
| iwl_rate_mcs[index].mbps, iwl_rate_mcs[index].mcs); |
| } |
| } |
| |
| ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
| kfree(buff); |
| return ret; |
| } |
| |
| static const struct file_operations rs_sta_dbgfs_scale_table_ops = { |
| .write = rs_sta_dbgfs_scale_table_write, |
| .read = rs_sta_dbgfs_scale_table_read, |
| .open = open_file_generic, |
| .llseek = default_llseek, |
| }; |
| static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
| char __user *user_buf, size_t count, loff_t *ppos) |
| { |
| char *buff; |
| int desc = 0; |
| int i, j; |
| ssize_t ret; |
| |
| struct iwl_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 < IWL_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 = rs_sta_dbgfs_stats_table_read, |
| .open = open_file_generic, |
| .llseek = default_llseek, |
| }; |
| |
| static ssize_t rs_sta_dbgfs_rate_scale_data_read(struct file *file, |
| char __user *user_buf, size_t count, loff_t *ppos) |
| { |
| char buff[120]; |
| int desc = 0; |
| |
| struct iwl_lq_sta *lq_sta = file->private_data; |
| struct iwl_priv *priv; |
| struct iwl_scale_tbl_info *tbl = &lq_sta->lq_info[lq_sta->active_tbl]; |
| |
| priv = lq_sta->drv; |
| |
| if (is_Ht(tbl->lq_type)) |
| desc += sprintf(buff+desc, |
| "Bit Rate= %d Mb/s\n", |
| tbl->expected_tpt[lq_sta->last_txrate_idx]); |
| else |
| desc += sprintf(buff+desc, |
| "Bit Rate= %d Mb/s\n", |
| iwl_rates[lq_sta->last_txrate_idx].ieee >> 1); |
| |
| return simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
| } |
| |
| static const struct file_operations rs_sta_dbgfs_rate_scale_data_ops = { |
| .read = rs_sta_dbgfs_rate_scale_data_read, |
| .open = open_file_generic, |
| .llseek = default_llseek, |
| }; |
| |
| static void rs_add_debugfs(void *priv, void *priv_sta, |
| struct dentry *dir) |
| { |
| struct iwl_lq_sta *lq_sta = priv_sta; |
| lq_sta->rs_sta_dbgfs_scale_table_file = |
| debugfs_create_file("rate_scale_table", S_IRUSR | S_IWUSR, dir, |
| lq_sta, &rs_sta_dbgfs_scale_table_ops); |
| lq_sta->rs_sta_dbgfs_stats_table_file = |
| debugfs_create_file("rate_stats_table", S_IRUSR, dir, |
| lq_sta, &rs_sta_dbgfs_stats_table_ops); |
| lq_sta->rs_sta_dbgfs_rate_scale_data_file = |
| debugfs_create_file("rate_scale_data", S_IRUSR, dir, |
| lq_sta, &rs_sta_dbgfs_rate_scale_data_ops); |
| lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file = |
| debugfs_create_u8("tx_agg_tid_enable", S_IRUSR | S_IWUSR, dir, |
| &lq_sta->tx_agg_tid_en); |
| |
| } |
| |
| static void rs_remove_debugfs(void *priv, void *priv_sta) |
| { |
| struct iwl_lq_sta *lq_sta = priv_sta; |
| debugfs_remove(lq_sta->rs_sta_dbgfs_scale_table_file); |
| debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file); |
| debugfs_remove(lq_sta->rs_sta_dbgfs_rate_scale_data_file); |
| debugfs_remove(lq_sta->rs_sta_dbgfs_tx_agg_tid_en_file); |
| } |
| #endif |
| |
| /* |
| * Initialization of rate scaling information is done by driver after |
| * the station is added. Since mac80211 calls this function before a |
| * station is added we ignore it. |
| */ |
| static void rs_rate_init_stub(void *priv_r, struct ieee80211_supported_band *sband, |
| struct ieee80211_sta *sta, void *priv_sta) |
| { |
| } |
| static struct rate_control_ops rs_ops = { |
| .module = NULL, |
| .name = RS_NAME, |
| .tx_status = rs_tx_status, |
| .get_rate = rs_get_rate, |
| .rate_init = rs_rate_init_stub, |
| .alloc = rs_alloc, |
| .free = rs_free, |
| .alloc_sta = rs_alloc_sta, |
| .free_sta = rs_free_sta, |
| #ifdef CONFIG_MAC80211_DEBUGFS |
| .add_sta_debugfs = rs_add_debugfs, |
| .remove_sta_debugfs = rs_remove_debugfs, |
| #endif |
| }; |
| |
| int iwlagn_rate_control_register(void) |
| { |
| return ieee80211_rate_control_register(&rs_ops); |
| } |
| |
| void iwlagn_rate_control_unregister(void) |
| { |
| ieee80211_rate_control_unregister(&rs_ops); |
| } |
| |