| /****************************************************************************** |
| * |
| * Copyright(c) 2005 - 2007 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: |
| * James P. Ketrenos <ipw2100-admin@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/wireless.h> |
| #include <net/mac80211.h> |
| #include <net/ieee80211.h> |
| |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/delay.h> |
| |
| #include <linux/workqueue.h> |
| |
| #include <net/mac80211.h> |
| #include <linux/wireless.h> |
| |
| #define IWL 4965 |
| |
| #include "../net/mac80211/ieee80211_rate.h" |
| |
| #include "iwlwifi.h" |
| #include "iwl-helpers.h" |
| |
| #define RS_NAME "iwl-4965-rs" |
| |
| #define NUM_TRY_BEFORE_ANTENNA_TOGGLE 1 |
| #define IWL_NUMBER_TRY 1 |
| #define IWL_HT_NUMBER_TRY 3 |
| |
| #define IWL_RATE_MAX_WINDOW 62 |
| #define IWL_RATE_HIGH_TH 10880 |
| #define IWL_RATE_MIN_FAILURE_TH 6 |
| #define IWL_RATE_MIN_SUCCESS_TH 8 |
| #define IWL_RATE_DECREASE_TH 1920 |
| #define IWL_RATE_INCREASE_TH 8960 |
| #define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) /*2 seconds */ |
| |
| 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 |
| }; |
| |
| struct iwl_rate { |
| u32 rate_n_flags; |
| } __attribute__ ((packed)); |
| |
| struct iwl_rate_scale_data { |
| u64 data; |
| s32 success_counter; |
| s32 success_ratio; |
| s32 counter; |
| s32 average_tpt; |
| unsigned long stamp; |
| }; |
| |
| struct iwl_scale_tbl_info { |
| enum iwl_table_type lq_type; |
| enum iwl_antenna_type antenna_type; |
| u8 is_SGI; |
| u8 is_fat; |
| u8 is_dup; |
| u8 action; |
| s32 *expected_tpt; |
| struct iwl_rate current_rate; |
| struct iwl_rate_scale_data win[IWL_RATE_COUNT]; |
| }; |
| |
| struct iwl_rate_scale_priv { |
| u8 active_tbl; |
| u8 enable_counter; |
| u8 stay_in_tbl; |
| u8 search_better_tbl; |
| s32 last_tpt; |
| u32 table_count_limit; |
| u32 max_failure_limit; |
| u32 max_success_limit; |
| u32 table_count; |
| u32 total_failed; |
| u32 total_success; |
| u32 flush_timer; |
| u8 action_counter; |
| u8 antenna; |
| u8 valid_antenna; |
| u8 is_green; |
| u8 is_dup; |
| u8 phymode; |
| u8 ibss_sta_added; |
| u32 supp_rates; |
| u16 active_rate; |
| u16 active_siso_rate; |
| u16 active_mimo_rate; |
| u16 active_rate_basic; |
| struct iwl_link_quality_cmd lq; |
| struct iwl_scale_tbl_info lq_info[LQ_SIZE]; |
| #ifdef CONFIG_MAC80211_DEBUGFS |
| struct dentry *rs_sta_dbgfs_scale_table_file; |
| struct dentry *rs_sta_dbgfs_stats_table_file; |
| struct iwl_rate dbg_fixed; |
| struct iwl_priv *drv; |
| #endif |
| }; |
| |
| static void rs_rate_scale_perform(struct iwl_priv *priv, |
| struct net_device *dev, |
| struct ieee80211_hdr *hdr, |
| struct sta_info *sta); |
| static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, |
| struct iwl_rate *tx_mcs, |
| struct iwl_link_quality_cmd *tbl); |
| |
| |
| #ifdef CONFIG_MAC80211_DEBUGFS |
| static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, |
| struct iwl_rate *mcs, int index); |
| #else |
| static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, |
| struct iwl_rate *mcs, int index) |
| {} |
| #endif |
| static s32 expected_tpt_A[IWL_RATE_COUNT] = { |
| 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 |
| }; |
| |
| static s32 expected_tpt_G[IWL_RATE_COUNT] = { |
| 7, 13, 35, 58, 40, 57, 72, 98, 121, 154, 177, 186, 186 |
| }; |
| |
| static s32 expected_tpt_siso20MHz[IWL_RATE_COUNT] = { |
| 0, 0, 0, 0, 42, 42, 76, 102, 124, 159, 183, 193, 202 |
| }; |
| |
| static s32 expected_tpt_siso20MHzSGI[IWL_RATE_COUNT] = { |
| 0, 0, 0, 0, 46, 46, 82, 110, 132, 168, 192, 202, 211 |
| }; |
| |
| static s32 expected_tpt_mimo20MHz[IWL_RATE_COUNT] = { |
| 0, 0, 0, 0, 74, 74, 123, 155, 179, 214, 236, 244, 251 |
| }; |
| |
| static s32 expected_tpt_mimo20MHzSGI[IWL_RATE_COUNT] = { |
| 0, 0, 0, 0, 81, 81, 131, 164, 188, 222, 243, 251, 257 |
| }; |
| |
| static s32 expected_tpt_siso40MHz[IWL_RATE_COUNT] = { |
| 0, 0, 0, 0, 77, 77, 127, 160, 184, 220, 242, 250, 257 |
| }; |
| |
| static s32 expected_tpt_siso40MHzSGI[IWL_RATE_COUNT] = { |
| 0, 0, 0, 0, 83, 83, 135, 169, 193, 229, 250, 257, 264 |
| }; |
| |
| static s32 expected_tpt_mimo40MHz[IWL_RATE_COUNT] = { |
| 0, 0, 0, 0, 123, 123, 182, 214, 235, 264, 279, 285, 289 |
| }; |
| |
| static s32 expected_tpt_mimo40MHzSGI[IWL_RATE_COUNT] = { |
| 0, 0, 0, 0, 131, 131, 191, 222, 242, 270, 284, 289, 293 |
| }; |
| |
| static int iwl_lq_sync_callback(struct iwl_priv *priv, |
| struct iwl_cmd *cmd, struct sk_buff *skb) |
| { |
| /*We didn't cache the SKB; let the caller free it */ |
| return 1; |
| } |
| |
| static inline u8 iwl_rate_get_rate(u32 rate_n_flags) |
| { |
| return (u8)(rate_n_flags & 0xFF); |
| } |
| |
| static int rs_send_lq_cmd(struct iwl_priv *priv, |
| struct iwl_link_quality_cmd *lq, u8 flags) |
| { |
| #ifdef CONFIG_IWLWIFI_DEBUG |
| int i; |
| #endif |
| int rc = -1; |
| |
| struct iwl_host_cmd cmd = { |
| .id = REPLY_TX_LINK_QUALITY_CMD, |
| .len = sizeof(struct iwl_link_quality_cmd), |
| .meta.flags = flags, |
| .data = lq, |
| }; |
| |
| if ((lq->sta_id == 0xFF) && |
| (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) |
| return rc; |
| |
| if (lq->sta_id == 0xFF) |
| lq->sta_id = IWL_AP_ID; |
| |
| IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id); |
| IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n", |
| lq->general_params.single_stream_ant_msk, |
| lq->general_params.dual_stream_ant_msk); |
| #ifdef CONFIG_IWLWIFI_DEBUG |
| for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) |
| IWL_DEBUG_RATE("lq index %d 0x%X\n", |
| i, lq->rs_table[i].rate_n_flags); |
| #endif |
| |
| if (flags & CMD_ASYNC) |
| cmd.meta.u.callback = iwl_lq_sync_callback; |
| |
| if (iwl_is_associated(priv) && priv->assoc_station_added && |
| priv->lq_mngr.lq_ready) |
| rc = iwl_send_cmd(priv, &cmd); |
| |
| return rc; |
| } |
| |
| static int 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; |
| |
| return 0; |
| } |
| |
| static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, |
| int scale_index, s32 tpt, u32 status) |
| { |
| int rc = 0; |
| struct iwl_rate_scale_data *window = NULL; |
| u64 mask; |
| u8 win_size = IWL_RATE_MAX_WINDOW; |
| s32 fail_count; |
| |
| if (scale_index < 0) |
| return -1; |
| |
| if (scale_index >= IWL_RATE_COUNT) |
| return -1; |
| |
| window = &(windows[scale_index]); |
| |
| if (window->counter >= win_size) { |
| |
| window->counter = win_size - 1; |
| mask = 1; |
| mask = (mask << (win_size - 1)); |
| if ((window->data & mask)) { |
| window->data &= ~mask; |
| window->success_counter = window->success_counter - 1; |
| } |
| } |
| |
| window->counter = window->counter + 1; |
| mask = window->data; |
| window->data = (mask << 1); |
| if (status != 0) { |
| window->success_counter = window->success_counter + 1; |
| window->data |= 0x1; |
| } |
| |
| 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; |
| |
| 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; |
| |
| window->stamp = jiffies; |
| |
| return rc; |
| } |
| |
| int static rs_mcs_from_tbl(struct iwl_rate *mcs_rate, |
| struct iwl_scale_tbl_info *tbl, |
| int index, u8 use_green) |
| { |
| int rc = 0; |
| |
| if (is_legacy(tbl->lq_type)) { |
| mcs_rate->rate_n_flags = iwl_rates[index].plcp; |
| if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE) |
| mcs_rate->rate_n_flags |= RATE_MCS_CCK_MSK; |
| |
| } else if (is_siso(tbl->lq_type)) { |
| if (index > IWL_LAST_OFDM_RATE) |
| index = IWL_LAST_OFDM_RATE; |
| mcs_rate->rate_n_flags = iwl_rates[index].plcp_siso | |
| RATE_MCS_HT_MSK; |
| } else { |
| if (index > IWL_LAST_OFDM_RATE) |
| index = IWL_LAST_OFDM_RATE; |
| mcs_rate->rate_n_flags = iwl_rates[index].plcp_mimo | |
| RATE_MCS_HT_MSK; |
| } |
| |
| switch (tbl->antenna_type) { |
| case ANT_BOTH: |
| mcs_rate->rate_n_flags |= RATE_MCS_ANT_AB_MSK; |
| break; |
| case ANT_MAIN: |
| mcs_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; |
| break; |
| case ANT_AUX: |
| mcs_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; |
| break; |
| case ANT_NONE: |
| break; |
| } |
| |
| if (is_legacy(tbl->lq_type)) |
| return rc; |
| |
| if (tbl->is_fat) { |
| if (tbl->is_dup) |
| mcs_rate->rate_n_flags |= RATE_MCS_DUP_MSK; |
| else |
| mcs_rate->rate_n_flags |= RATE_MCS_FAT_MSK; |
| } |
| if (tbl->is_SGI) |
| mcs_rate->rate_n_flags |= RATE_MCS_SGI_MSK; |
| |
| if (use_green) { |
| mcs_rate->rate_n_flags |= RATE_MCS_GF_MSK; |
| if (is_siso(tbl->lq_type)) |
| mcs_rate->rate_n_flags &= ~RATE_MCS_SGI_MSK; |
| } |
| return rc; |
| } |
| |
| static int rs_get_tbl_info_from_mcs(const struct iwl_rate *mcs_rate, |
| int phymode, struct iwl_scale_tbl_info *tbl, |
| int *rate_idx) |
| { |
| int index; |
| u32 ant_msk; |
| |
| index = iwl_rate_index_from_plcp(mcs_rate->rate_n_flags); |
| |
| if (index == IWL_RATE_INVALID) { |
| *rate_idx = -1; |
| return -1; |
| } |
| tbl->is_SGI = 0; |
| tbl->is_fat = 0; |
| tbl->is_dup = 0; |
| tbl->antenna_type = ANT_BOTH; |
| |
| if (!(mcs_rate->rate_n_flags & RATE_MCS_HT_MSK)) { |
| ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); |
| |
| if (ant_msk == RATE_MCS_ANT_AB_MSK) |
| tbl->lq_type = LQ_NONE; |
| else { |
| |
| if (phymode == MODE_IEEE80211A) |
| tbl->lq_type = LQ_A; |
| else |
| tbl->lq_type = LQ_G; |
| |
| if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) |
| tbl->antenna_type = ANT_MAIN; |
| else |
| tbl->antenna_type = ANT_AUX; |
| } |
| *rate_idx = index; |
| |
| } else if (iwl_rate_get_rate(mcs_rate->rate_n_flags) |
| <= IWL_RATE_SISO_60M_PLCP) { |
| tbl->lq_type = LQ_SISO; |
| |
| ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); |
| if (ant_msk == RATE_MCS_ANT_AB_MSK) |
| tbl->lq_type = LQ_NONE; |
| else { |
| if (mcs_rate->rate_n_flags & RATE_MCS_ANT_A_MSK) |
| tbl->antenna_type = ANT_MAIN; |
| else |
| tbl->antenna_type = ANT_AUX; |
| } |
| if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) |
| tbl->is_SGI = 1; |
| |
| if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || |
| (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) |
| tbl->is_fat = 1; |
| |
| if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) |
| tbl->is_dup = 1; |
| |
| *rate_idx = index; |
| } else { |
| tbl->lq_type = LQ_MIMO; |
| if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) |
| tbl->is_SGI = 1; |
| |
| if ((mcs_rate->rate_n_flags & RATE_MCS_FAT_MSK) || |
| (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK)) |
| tbl->is_fat = 1; |
| |
| if (mcs_rate->rate_n_flags & RATE_MCS_DUP_MSK) |
| tbl->is_dup = 1; |
| *rate_idx = index; |
| } |
| return 0; |
| } |
| |
| static inline void rs_toggle_antenna(struct iwl_rate *new_rate, |
| struct iwl_scale_tbl_info *tbl) |
| { |
| if (tbl->antenna_type == ANT_AUX) { |
| tbl->antenna_type = ANT_MAIN; |
| new_rate->rate_n_flags &= ~RATE_MCS_ANT_B_MSK; |
| new_rate->rate_n_flags |= RATE_MCS_ANT_A_MSK; |
| } else { |
| tbl->antenna_type = ANT_AUX; |
| new_rate->rate_n_flags &= ~RATE_MCS_ANT_A_MSK; |
| new_rate->rate_n_flags |= RATE_MCS_ANT_B_MSK; |
| } |
| } |
| |
| static inline s8 rs_use_green(struct iwl_priv *priv) |
| { |
| s8 rc = 0; |
| #ifdef CONFIG_IWLWIFI_HT |
| if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) |
| return 0; |
| |
| if ((priv->current_assoc_ht.is_green_field) && |
| !(priv->current_assoc_ht.operating_mode & 0x4)) |
| rc = 1; |
| #endif /*CONFIG_IWLWIFI_HT */ |
| return rc; |
| } |
| |
| /** |
| * rs_get_supported_rates - get the available rates |
| * |
| * if management frame or broadcast frame only return |
| * basic available rates. |
| * |
| */ |
| static void rs_get_supported_rates(struct iwl_rate_scale_priv *lq_data, |
| struct ieee80211_hdr *hdr, |
| enum iwl_table_type rate_type, |
| u16 *data_rate) |
| { |
| if (is_legacy(rate_type)) |
| *data_rate = lq_data->active_rate; |
| else { |
| if (is_siso(rate_type)) |
| *data_rate = lq_data->active_siso_rate; |
| else |
| *data_rate = lq_data->active_mimo_rate; |
| } |
| |
| if (hdr && is_multicast_ether_addr(hdr->addr1) && |
| lq_data->active_rate_basic) |
| *data_rate = lq_data->active_rate_basic; |
| } |
| |
| static u16 rs_get_adjacent_rate(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 adjascent 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("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("Skipping masked higher rate: %d\n", high); |
| } |
| |
| return (high << 8) | low; |
| } |
| |
| static int rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data, |
| struct iwl_scale_tbl_info *tbl, u8 scale_index, |
| u8 ht_possible, struct iwl_rate *mcs_rate) |
| { |
| s32 low; |
| u16 rate_mask; |
| u16 high_low; |
| u8 switch_to_legacy = 0; |
| u8 is_green = lq_data->is_green; |
| |
| /* 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_data->phymode == MODE_IEEE80211A) |
| tbl->lq_type = LQ_A; |
| else |
| tbl->lq_type = LQ_G; |
| |
| if ((tbl->antenna_type == ANT_BOTH) || |
| (tbl->antenna_type == ANT_NONE)) |
| tbl->antenna_type = ANT_MAIN; |
| |
| tbl->is_fat = 0; |
| tbl->is_SGI = 0; |
| } |
| |
| rs_get_supported_rates(lq_data, NULL, tbl->lq_type, &rate_mask); |
| |
| /* mask with station rate restriction */ |
| if (is_legacy(tbl->lq_type)) { |
| if (lq_data->phymode == (u8) MODE_IEEE80211A) |
| rate_mask = (u16)(rate_mask & |
| (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
| else |
| rate_mask = (u16)(rate_mask & lq_data->supp_rates); |
| } |
| |
| /* if we did switched from HT to legacy check current rate */ |
| if ((switch_to_legacy) && |
| (rate_mask & (1 << scale_index))) { |
| rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); |
| return 0; |
| } |
| |
| high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type); |
| low = high_low & 0xff; |
| |
| if (low != IWL_RATE_INVALID) |
| rs_mcs_from_tbl(mcs_rate, tbl, low, is_green); |
| else |
| rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green); |
| |
| return 0; |
| } |
| |
| static void rs_tx_status(void *priv_rate, |
| struct net_device *dev, |
| struct sk_buff *skb, |
| struct ieee80211_tx_status *tx_resp) |
| { |
| int status; |
| u8 retries; |
| int rs_index, index = 0; |
| struct iwl_rate_scale_priv *lq; |
| struct iwl_link_quality_cmd *table; |
| struct sta_info *sta; |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
| struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| struct iwl_rate_scale_data *window = NULL; |
| struct iwl_rate_scale_data *search_win = NULL; |
| struct iwl_rate tx_mcs; |
| struct iwl_scale_tbl_info tbl_type; |
| struct iwl_scale_tbl_info *curr_tbl, *search_tbl; |
| u8 active_index = 0; |
| u16 fc = le16_to_cpu(hdr->frame_control); |
| s32 tpt = 0; |
| |
| IWL_DEBUG_RATE_LIMIT("get frame ack response, update rate scale window\n"); |
| |
| if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) |
| return; |
| |
| retries = tx_resp->retry_count; |
| |
| if (retries > 15) |
| retries = 15; |
| |
| |
| sta = sta_info_get(local, hdr->addr1); |
| |
| if (!sta || !sta->rate_ctrl_priv) { |
| if (sta) |
| sta_info_put(sta); |
| return; |
| } |
| |
| lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; |
| |
| if (!priv->lq_mngr.lq_ready) |
| return; |
| |
| if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) |
| return; |
| |
| table = &lq->lq; |
| active_index = lq->active_tbl; |
| |
| lq->antenna = (lq->valid_antenna & local->hw.conf.antenna_sel_tx); |
| if (!lq->antenna) |
| lq->antenna = lq->valid_antenna; |
| |
| lq->antenna = lq->valid_antenna; |
| curr_tbl = &(lq->lq_info[active_index]); |
| search_tbl = &(lq->lq_info[(1 - active_index)]); |
| window = (struct iwl_rate_scale_data *) |
| &(curr_tbl->win[0]); |
| search_win = (struct iwl_rate_scale_data *) |
| &(search_tbl->win[0]); |
| |
| tx_mcs.rate_n_flags = tx_resp->control.tx_rate; |
| |
| rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, |
| &tbl_type, &rs_index); |
| if ((rs_index < 0) || (rs_index >= IWL_RATE_COUNT)) { |
| IWL_DEBUG_RATE("bad rate index at: %d rate 0x%X\n", |
| rs_index, tx_mcs.rate_n_flags); |
| sta_info_put(sta); |
| return; |
| } |
| |
| if (retries && |
| (tx_mcs.rate_n_flags != |
| le32_to_cpu(table->rs_table[0].rate_n_flags))) { |
| IWL_DEBUG_RATE("initial rate does not match 0x%x 0x%x\n", |
| tx_mcs.rate_n_flags, |
| le32_to_cpu(table->rs_table[0].rate_n_flags)); |
| sta_info_put(sta); |
| return; |
| } |
| |
| while (retries) { |
| tx_mcs.rate_n_flags = |
| le32_to_cpu(table->rs_table[index].rate_n_flags); |
| rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, |
| &tbl_type, &rs_index); |
| |
| if ((tbl_type.lq_type == search_tbl->lq_type) && |
| (tbl_type.antenna_type == search_tbl->antenna_type) && |
| (tbl_type.is_SGI == search_tbl->is_SGI)) { |
| if (search_tbl->expected_tpt) |
| tpt = search_tbl->expected_tpt[rs_index]; |
| else |
| tpt = 0; |
| rs_collect_tx_data(search_win, |
| rs_index, tpt, 0); |
| } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
| (tbl_type.antenna_type == curr_tbl->antenna_type) && |
| (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
| if (curr_tbl->expected_tpt) |
| tpt = curr_tbl->expected_tpt[rs_index]; |
| else |
| tpt = 0; |
| rs_collect_tx_data(window, rs_index, tpt, 0); |
| } |
| if (lq->stay_in_tbl) |
| lq->total_failed++; |
| --retries; |
| index++; |
| |
| } |
| |
| if (!tx_resp->retry_count) |
| tx_mcs.rate_n_flags = tx_resp->control.tx_rate; |
| else |
| tx_mcs.rate_n_flags = |
| le32_to_cpu(table->rs_table[index].rate_n_flags); |
| |
| rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, |
| &tbl_type, &rs_index); |
| |
| if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) |
| status = 1; |
| else |
| status = 0; |
| |
| if ((tbl_type.lq_type == search_tbl->lq_type) && |
| (tbl_type.antenna_type == search_tbl->antenna_type) && |
| (tbl_type.is_SGI == search_tbl->is_SGI)) { |
| if (search_tbl->expected_tpt) |
| tpt = search_tbl->expected_tpt[rs_index]; |
| else |
| tpt = 0; |
| rs_collect_tx_data(search_win, |
| rs_index, tpt, status); |
| } else if ((tbl_type.lq_type == curr_tbl->lq_type) && |
| (tbl_type.antenna_type == curr_tbl->antenna_type) && |
| (tbl_type.is_SGI == curr_tbl->is_SGI)) { |
| if (curr_tbl->expected_tpt) |
| tpt = curr_tbl->expected_tpt[rs_index]; |
| else |
| tpt = 0; |
| rs_collect_tx_data(window, rs_index, tpt, status); |
| } |
| |
| if (lq->stay_in_tbl) { |
| if (status) |
| lq->total_success++; |
| else |
| lq->total_failed++; |
| } |
| |
| rs_rate_scale_perform(priv, dev, hdr, sta); |
| sta_info_put(sta); |
| return; |
| } |
| |
| static u8 rs_is_ant_connected(u8 valid_antenna, |
| enum iwl_antenna_type antenna_type) |
| { |
| if (antenna_type == ANT_AUX) |
| return ((valid_antenna & 0x2) ? 1:0); |
| else if (antenna_type == ANT_MAIN) |
| return ((valid_antenna & 0x1) ? 1:0); |
| else if (antenna_type == ANT_BOTH) { |
| if ((valid_antenna & 0x3) == 0x3) |
| return 1; |
| else |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static u8 rs_is_other_ant_connected(u8 valid_antenna, |
| enum iwl_antenna_type antenna_type) |
| { |
| if (antenna_type == ANT_AUX) |
| return (rs_is_ant_connected(valid_antenna, ANT_MAIN)); |
| else |
| return (rs_is_ant_connected(valid_antenna, ANT_AUX)); |
| |
| return 0; |
| } |
| |
| static void rs_set_stay_in_table(u8 is_legacy, |
| struct iwl_rate_scale_priv *lq_data) |
| { |
| IWL_DEBUG_HT("we are staying in the same table\n"); |
| lq_data->stay_in_tbl = 1; |
| if (is_legacy) { |
| lq_data->table_count_limit = IWL_LEGACY_TABLE_COUNT; |
| lq_data->max_failure_limit = IWL_LEGACY_FAILURE_LIMIT; |
| lq_data->max_success_limit = IWL_LEGACY_TABLE_COUNT; |
| } else { |
| lq_data->table_count_limit = IWL_NONE_LEGACY_TABLE_COUNT; |
| lq_data->max_failure_limit = IWL_NONE_LEGACY_FAILURE_LIMIT; |
| lq_data->max_success_limit = IWL_NONE_LEGACY_SUCCESS_LIMIT; |
| } |
| lq_data->table_count = 0; |
| lq_data->total_failed = 0; |
| lq_data->total_success = 0; |
| } |
| |
| static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv *lq_data, |
| struct iwl_scale_tbl_info *tbl) |
| { |
| if (is_legacy(tbl->lq_type)) { |
| if (!is_a_band(tbl->lq_type)) |
| tbl->expected_tpt = expected_tpt_G; |
| else |
| tbl->expected_tpt = expected_tpt_A; |
| } else if (is_siso(tbl->lq_type)) { |
| if (tbl->is_fat && !lq_data->is_dup) |
| if (tbl->is_SGI) |
| tbl->expected_tpt = expected_tpt_siso40MHzSGI; |
| else |
| tbl->expected_tpt = expected_tpt_siso40MHz; |
| else if (tbl->is_SGI) |
| tbl->expected_tpt = expected_tpt_siso20MHzSGI; |
| else |
| tbl->expected_tpt = expected_tpt_siso20MHz; |
| |
| } else if (is_mimo(tbl->lq_type)) { |
| if (tbl->is_fat && !lq_data->is_dup) |
| if (tbl->is_SGI) |
| tbl->expected_tpt = expected_tpt_mimo40MHzSGI; |
| else |
| tbl->expected_tpt = expected_tpt_mimo40MHz; |
| else if (tbl->is_SGI) |
| tbl->expected_tpt = expected_tpt_mimo20MHzSGI; |
| else |
| tbl->expected_tpt = expected_tpt_mimo20MHz; |
| } else |
| tbl->expected_tpt = expected_tpt_G; |
| } |
| |
| #ifdef CONFIG_IWLWIFI_HT |
| static s32 rs_get_best_rate(struct iwl_priv *priv, |
| struct iwl_rate_scale_priv *lq_data, |
| struct iwl_scale_tbl_info *tbl, |
| u16 rate_mask, s8 index, s8 rate) |
| { |
| struct iwl_scale_tbl_info *active_tbl = |
| &(lq_data->lq_info[lq_data->active_tbl]); |
| s32 new_rate, high, low, start_hi; |
| s32 active_sr = active_tbl->win[index].success_ratio; |
| s32 *tpt_tbl = tbl->expected_tpt; |
| s32 active_tpt = active_tbl->expected_tpt[index]; |
| u16 high_low; |
| |
| new_rate = high = low = start_hi = IWL_RATE_INVALID; |
| |
| for (; ;) { |
| high_low = rs_get_adjacent_rate(rate, rate_mask, tbl->lq_type); |
| |
| low = high_low & 0xff; |
| high = (high_low >> 8) & 0xff; |
| |
| if ((((100 * tpt_tbl[rate]) > lq_data->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))) { |
| |
| if (start_hi != IWL_RATE_INVALID) { |
| new_rate = start_hi; |
| break; |
| } |
| new_rate = rate; |
| if (low != IWL_RATE_INVALID) |
| rate = low; |
| else |
| break; |
| } else { |
| if (new_rate != IWL_RATE_INVALID) |
| break; |
| else if (high != IWL_RATE_INVALID) { |
| start_hi = high; |
| rate = high; |
| } else { |
| new_rate = rate; |
| break; |
| } |
| } |
| } |
| |
| return new_rate; |
| } |
| #endif /* CONFIG_IWLWIFI_HT */ |
| |
| static inline u8 rs_is_both_ant_supp(u8 valid_antenna) |
| { |
| return (rs_is_ant_connected(valid_antenna, ANT_BOTH)); |
| } |
| |
| static int rs_switch_to_mimo(struct iwl_priv *priv, |
| struct iwl_rate_scale_priv *lq_data, |
| struct iwl_scale_tbl_info *tbl, int index) |
| { |
| int rc = -1; |
| #ifdef CONFIG_IWLWIFI_HT |
| u16 rate_mask; |
| s32 rate; |
| s8 is_green = lq_data->is_green; |
| |
| if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) |
| return -1; |
| |
| IWL_DEBUG_HT("LQ: try to switch to MIMO\n"); |
| tbl->lq_type = LQ_MIMO; |
| rs_get_supported_rates(lq_data, NULL, tbl->lq_type, |
| &rate_mask); |
| |
| if (priv->current_assoc_ht.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) |
| return -1; |
| |
| if (!rs_is_both_ant_supp(lq_data->antenna)) |
| return -1; |
| |
| rc = 0; |
| tbl->is_dup = lq_data->is_dup; |
| tbl->action = 0; |
| if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) |
| tbl->is_fat = 1; |
| else |
| tbl->is_fat = 0; |
| |
| if (tbl->is_fat) { |
| if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) |
| tbl->is_SGI = 1; |
| else |
| tbl->is_SGI = 0; |
| } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) |
| tbl->is_SGI = 1; |
| else |
| tbl->is_SGI = 0; |
| |
| rs_get_expected_tpt_table(lq_data, tbl); |
| |
| rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); |
| |
| IWL_DEBUG_HT("LQ: MIMO best rate %d mask %X\n", rate, rate_mask); |
| if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) |
| return -1; |
| rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); |
| |
| IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", |
| tbl->current_rate.rate_n_flags, is_green); |
| |
| #endif /*CONFIG_IWLWIFI_HT */ |
| return rc; |
| } |
| |
| static int rs_switch_to_siso(struct iwl_priv *priv, |
| struct iwl_rate_scale_priv *lq_data, |
| struct iwl_scale_tbl_info *tbl, int index) |
| { |
| int rc = -1; |
| #ifdef CONFIG_IWLWIFI_HT |
| u16 rate_mask; |
| u8 is_green = lq_data->is_green; |
| s32 rate; |
| |
| IWL_DEBUG_HT("LQ: try to switch to SISO\n"); |
| if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) |
| return -1; |
| |
| rc = 0; |
| tbl->is_dup = lq_data->is_dup; |
| tbl->lq_type = LQ_SISO; |
| tbl->action = 0; |
| rs_get_supported_rates(lq_data, NULL, tbl->lq_type, |
| &rate_mask); |
| |
| if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) |
| tbl->is_fat = 1; |
| else |
| tbl->is_fat = 0; |
| |
| if (tbl->is_fat) { |
| if (priv->current_assoc_ht.sgf & HT_SHORT_GI_40MHZ_ONLY) |
| tbl->is_SGI = 1; |
| else |
| tbl->is_SGI = 0; |
| } else if (priv->current_assoc_ht.sgf & HT_SHORT_GI_20MHZ_ONLY) |
| tbl->is_SGI = 1; |
| else |
| tbl->is_SGI = 0; |
| |
| if (is_green) |
| tbl->is_SGI = 0; |
| |
| rs_get_expected_tpt_table(lq_data, tbl); |
| rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); |
| |
| IWL_DEBUG_HT("LQ: get best rate %d mask %X\n", rate, rate_mask); |
| if ((rate == IWL_RATE_INVALID) || !((1 << rate) & rate_mask)) { |
| IWL_DEBUG_HT("can not switch with index %d rate mask %x\n", |
| rate, rate_mask); |
| return -1; |
| } |
| rs_mcs_from_tbl(&tbl->current_rate, tbl, rate, is_green); |
| IWL_DEBUG_HT("LQ: Switch to new mcs %X index is green %X\n", |
| tbl->current_rate.rate_n_flags, is_green); |
| |
| #endif /*CONFIG_IWLWIFI_HT */ |
| return rc; |
| } |
| |
| static int rs_move_legacy_other(struct iwl_priv *priv, |
| struct iwl_rate_scale_priv *lq_data, |
| int index) |
| { |
| int rc = 0; |
| struct iwl_scale_tbl_info *tbl = |
| &(lq_data->lq_info[lq_data->active_tbl]); |
| struct iwl_scale_tbl_info *search_tbl = |
| &(lq_data->lq_info[(1 - lq_data->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 = tbl->action; |
| |
| for (; ;) { |
| switch (tbl->action) { |
| case IWL_LEGACY_SWITCH_ANTENNA: |
| IWL_DEBUG_HT("LQ Legacy switch Antenna\n"); |
| |
| search_tbl->lq_type = LQ_NONE; |
| lq_data->action_counter++; |
| if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
| break; |
| if (!rs_is_other_ant_connected(lq_data->antenna, |
| tbl->antenna_type)) |
| break; |
| |
| memcpy(search_tbl, tbl, sz); |
| |
| rs_toggle_antenna(&(search_tbl->current_rate), |
| search_tbl); |
| rs_get_expected_tpt_table(lq_data, search_tbl); |
| lq_data->search_better_tbl = 1; |
| goto out; |
| |
| case IWL_LEGACY_SWITCH_SISO: |
| IWL_DEBUG_HT("LQ: Legacy switch to SISO\n"); |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->lq_type = LQ_SISO; |
| search_tbl->is_SGI = 0; |
| search_tbl->is_fat = 0; |
| rc = rs_switch_to_siso(priv, lq_data, search_tbl, |
| index); |
| if (!rc) { |
| lq_data->search_better_tbl = 1; |
| lq_data->action_counter = 0; |
| } |
| if (!rc) |
| goto out; |
| |
| break; |
| case IWL_LEGACY_SWITCH_MIMO: |
| IWL_DEBUG_HT("LQ: Legacy switch MIMO\n"); |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->lq_type = LQ_MIMO; |
| search_tbl->is_SGI = 0; |
| search_tbl->is_fat = 0; |
| search_tbl->antenna_type = ANT_BOTH; |
| rc = rs_switch_to_mimo(priv, lq_data, search_tbl, |
| index); |
| if (!rc) { |
| lq_data->search_better_tbl = 1; |
| lq_data->action_counter = 0; |
| } |
| if (!rc) |
| goto out; |
| break; |
| } |
| tbl->action++; |
| if (tbl->action > IWL_LEGACY_SWITCH_MIMO) |
| tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
| |
| if (tbl->action == start_action) |
| break; |
| |
| } |
| return 0; |
| |
| out: |
| tbl->action++; |
| if (tbl->action > IWL_LEGACY_SWITCH_MIMO) |
| tbl->action = IWL_LEGACY_SWITCH_ANTENNA; |
| return 0; |
| |
| } |
| |
| static int rs_move_siso_to_other(struct iwl_priv *priv, |
| struct iwl_rate_scale_priv *lq_data, |
| int index) |
| { |
| int rc = -1; |
| u8 is_green = lq_data->is_green; |
| struct iwl_scale_tbl_info *tbl = |
| &(lq_data->lq_info[lq_data->active_tbl]); |
| struct iwl_scale_tbl_info *search_tbl = |
| &(lq_data->lq_info[(1 - lq_data->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 = tbl->action; |
| |
| for (;;) { |
| lq_data->action_counter++; |
| switch (tbl->action) { |
| case IWL_SISO_SWITCH_ANTENNA: |
| IWL_DEBUG_HT("LQ: SISO SWITCH ANTENNA SISO\n"); |
| search_tbl->lq_type = LQ_NONE; |
| if (window->success_ratio >= IWL_RS_GOOD_RATIO) |
| break; |
| if (!rs_is_other_ant_connected(lq_data->antenna, |
| tbl->antenna_type)) |
| break; |
| |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->action = IWL_SISO_SWITCH_MIMO; |
| rs_toggle_antenna(&(search_tbl->current_rate), |
| search_tbl); |
| lq_data->search_better_tbl = 1; |
| |
| goto out; |
| |
| case IWL_SISO_SWITCH_MIMO: |
| IWL_DEBUG_HT("LQ: SISO SWITCH TO MIMO FROM SISO\n"); |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->lq_type = LQ_MIMO; |
| search_tbl->is_SGI = 0; |
| search_tbl->is_fat = 0; |
| search_tbl->antenna_type = ANT_BOTH; |
| rc = rs_switch_to_mimo(priv, lq_data, search_tbl, |
| index); |
| if (!rc) |
| lq_data->search_better_tbl = 1; |
| |
| if (!rc) |
| goto out; |
| break; |
| case IWL_SISO_SWITCH_GI: |
| IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n"); |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->action = 0; |
| if (search_tbl->is_SGI) |
| search_tbl->is_SGI = 0; |
| else if (!is_green) |
| search_tbl->is_SGI = 1; |
| else |
| break; |
| lq_data->search_better_tbl = 1; |
| if ((tbl->lq_type == LQ_SISO) && |
| (tbl->is_SGI)) { |
| s32 tpt = lq_data->last_tpt / 100; |
| if (((!tbl->is_fat) && |
| (tpt >= expected_tpt_siso20MHz[index])) || |
| ((tbl->is_fat) && |
| (tpt >= expected_tpt_siso40MHz[index]))) |
| lq_data->search_better_tbl = 0; |
| } |
| rs_get_expected_tpt_table(lq_data, search_tbl); |
| rs_mcs_from_tbl(&search_tbl->current_rate, |
| search_tbl, index, is_green); |
| goto out; |
| } |
| tbl->action++; |
| if (tbl->action > IWL_SISO_SWITCH_GI) |
| tbl->action = IWL_SISO_SWITCH_ANTENNA; |
| |
| if (tbl->action == start_action) |
| break; |
| } |
| return 0; |
| |
| out: |
| tbl->action++; |
| if (tbl->action > IWL_SISO_SWITCH_GI) |
| tbl->action = IWL_SISO_SWITCH_ANTENNA; |
| return 0; |
| } |
| |
| static int rs_move_mimo_to_other(struct iwl_priv *priv, |
| struct iwl_rate_scale_priv *lq_data, |
| int index) |
| { |
| int rc = -1; |
| s8 is_green = lq_data->is_green; |
| struct iwl_scale_tbl_info *tbl = |
| &(lq_data->lq_info[lq_data->active_tbl]); |
| struct iwl_scale_tbl_info *search_tbl = |
| &(lq_data->lq_info[(1 - lq_data->active_tbl)]); |
| u32 sz = (sizeof(struct iwl_scale_tbl_info) - |
| (sizeof(struct iwl_rate_scale_data) * IWL_RATE_COUNT)); |
| u8 start_action = tbl->action; |
| |
| for (;;) { |
| lq_data->action_counter++; |
| switch (tbl->action) { |
| case IWL_MIMO_SWITCH_ANTENNA_A: |
| case IWL_MIMO_SWITCH_ANTENNA_B: |
| IWL_DEBUG_HT("LQ: MIMO SWITCH TO SISO\n"); |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->lq_type = LQ_SISO; |
| search_tbl->is_SGI = 0; |
| search_tbl->is_fat = 0; |
| if (tbl->action == IWL_MIMO_SWITCH_ANTENNA_A) |
| search_tbl->antenna_type = ANT_MAIN; |
| else |
| search_tbl->antenna_type = ANT_AUX; |
| |
| rc = rs_switch_to_siso(priv, lq_data, search_tbl, |
| index); |
| if (!rc) { |
| lq_data->search_better_tbl = 1; |
| goto out; |
| } |
| break; |
| |
| case IWL_MIMO_SWITCH_GI: |
| IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n"); |
| memcpy(search_tbl, tbl, sz); |
| search_tbl->lq_type = LQ_MIMO; |
| search_tbl->antenna_type = ANT_BOTH; |
| search_tbl->action = 0; |
| if (search_tbl->is_SGI) |
| search_tbl->is_SGI = 0; |
| else |
| search_tbl->is_SGI = 1; |
| lq_data->search_better_tbl = 1; |
| if ((tbl->lq_type == LQ_MIMO) && |
| (tbl->is_SGI)) { |
| s32 tpt = lq_data->last_tpt / 100; |
| if (((!tbl->is_fat) && |
| (tpt >= expected_tpt_mimo20MHz[index])) || |
| ((tbl->is_fat) && |
| (tpt >= expected_tpt_mimo40MHz[index]))) |
| lq_data->search_better_tbl = 0; |
| } |
| rs_get_expected_tpt_table(lq_data, search_tbl); |
| rs_mcs_from_tbl(&search_tbl->current_rate, |
| search_tbl, index, is_green); |
| goto out; |
| |
| } |
| tbl->action++; |
| if (tbl->action > IWL_MIMO_SWITCH_GI) |
| tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; |
| |
| if (tbl->action == start_action) |
| break; |
| } |
| |
| return 0; |
| out: |
| tbl->action++; |
| if (tbl->action > IWL_MIMO_SWITCH_GI) |
| tbl->action = IWL_MIMO_SWITCH_ANTENNA_A; |
| return 0; |
| |
| } |
| |
| static void rs_stay_in_table(struct iwl_rate_scale_priv *lq_data) |
| { |
| struct iwl_scale_tbl_info *tbl; |
| int i; |
| int active_tbl; |
| int flush_interval_passed = 0; |
| |
| active_tbl = lq_data->active_tbl; |
| |
| tbl = &(lq_data->lq_info[active_tbl]); |
| |
| if (lq_data->stay_in_tbl) { |
| |
| if (lq_data->flush_timer) |
| flush_interval_passed = |
| time_after(jiffies, |
| (unsigned long)(lq_data->flush_timer + |
| IWL_RATE_SCALE_FLUSH_INTVL)); |
| |
| flush_interval_passed = 0; |
| if ((lq_data->total_failed > lq_data->max_failure_limit) || |
| (lq_data->total_success > lq_data->max_success_limit) || |
| ((!lq_data->search_better_tbl) && (lq_data->flush_timer) |
| && (flush_interval_passed))) { |
| IWL_DEBUG_HT("LQ: stay is expired %d %d %d\n:", |
| lq_data->total_failed, |
| lq_data->total_success, |
| flush_interval_passed); |
| lq_data->stay_in_tbl = 0; |
| lq_data->total_failed = 0; |
| lq_data->total_success = 0; |
| lq_data->flush_timer = 0; |
| } else if (lq_data->table_count > 0) { |
| lq_data->table_count++; |
| if (lq_data->table_count >= |
| lq_data->table_count_limit) { |
| lq_data->table_count = 0; |
| |
| IWL_DEBUG_HT("LQ: stay in table clear win\n"); |
| for (i = 0; i < IWL_RATE_COUNT; i++) |
| rs_rate_scale_clear_window( |
| &(tbl->win[i])); |
| } |
| } |
| |
| if (!lq_data->stay_in_tbl) { |
| for (i = 0; i < IWL_RATE_COUNT; i++) |
| rs_rate_scale_clear_window(&(tbl->win[i])); |
| } |
| } |
| } |
| |
| static void rs_rate_scale_perform(struct iwl_priv *priv, |
| struct net_device *dev, |
| struct ieee80211_hdr *hdr, |
| struct sta_info *sta) |
| { |
| 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 fc, rate_mask; |
| u8 update_lq = 0; |
| struct iwl_rate_scale_priv *lq_data; |
| struct iwl_scale_tbl_info *tbl, *tbl1; |
| u16 rate_scale_index_msk = 0; |
| struct iwl_rate mcs_rate; |
| u8 is_green = 0; |
| u8 active_tbl = 0; |
| u8 done_search = 0; |
| u16 high_low; |
| |
| IWL_DEBUG_RATE("rate scale calculate new rate for skb\n"); |
| |
| fc = le16_to_cpu(hdr->frame_control); |
| if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { |
| /* Send management frames and broadcast/multicast data using |
| * lowest rate. */ |
| /* TODO: this could probably be improved.. */ |
| return; |
| } |
| |
| if (!sta || !sta->rate_ctrl_priv) |
| return; |
| |
| if (!priv->lq_mngr.lq_ready) { |
| IWL_DEBUG_RATE("still rate scaling not ready\n"); |
| return; |
| } |
| lq_data = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; |
| |
| if (!lq_data->search_better_tbl) |
| active_tbl = lq_data->active_tbl; |
| else |
| active_tbl = 1 - lq_data->active_tbl; |
| |
| tbl = &(lq_data->lq_info[active_tbl]); |
| is_green = lq_data->is_green; |
| |
| index = sta->last_txrate; |
| |
| IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index, |
| tbl->lq_type); |
| |
| rs_get_supported_rates(lq_data, hdr, tbl->lq_type, |
| &rate_mask); |
| |
| IWL_DEBUG_RATE("mask 0x%04X \n", rate_mask); |
| |
| /* mask with station rate restriction */ |
| if (is_legacy(tbl->lq_type)) { |
| if (lq_data->phymode == (u8) MODE_IEEE80211A) |
| rate_scale_index_msk = (u16) (rate_mask & |
| (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); |
| else |
| rate_scale_index_msk = (u16) (rate_mask & |
| lq_data->supp_rates); |
| |
| } else |
| rate_scale_index_msk = rate_mask; |
| |
| if (!rate_scale_index_msk) |
| rate_scale_index_msk = rate_mask; |
| |
| if (index < 0 || !((1 << index) & rate_scale_index_msk)) { |
| index = IWL_INVALID_VALUE; |
| update_lq = 1; |
| |
| /* get the lowest availabe rate */ |
| for (i = 0; i <= IWL_RATE_COUNT; i++) { |
| if ((1 << i) & rate_scale_index_msk) |
| index = i; |
| } |
| |
| if (index == IWL_INVALID_VALUE) { |
| IWL_WARNING("Can not find a suitable rate\n"); |
| return; |
| } |
| } |
| |
| if (!tbl->expected_tpt) |
| rs_get_expected_tpt_table(lq_data, tbl); |
| |
| window = &(tbl->win[index]); |
| |
| fail_count = window->counter - window->success_counter; |
| if (((fail_count < IWL_RATE_MIN_FAILURE_TH) && |
| (window->success_counter < IWL_RATE_MIN_SUCCESS_TH)) |
| || (tbl->expected_tpt == NULL)) { |
| IWL_DEBUG_RATE("LQ: still below TH succ %d total %d " |
| "for index %d\n", |
| window->success_counter, window->counter, index); |
| window->average_tpt = IWL_INVALID_VALUE; |
| rs_stay_in_table(lq_data); |
| if (update_lq) { |
| rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); |
| rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
| rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
| } |
| goto out; |
| |
| } else |
| window->average_tpt = ((window->success_ratio * |
| tbl->expected_tpt[index] + 64) / 128); |
| |
| if (lq_data->search_better_tbl) { |
| int success_limit = IWL_RATE_SCALE_SWITCH; |
| |
| if ((window->success_ratio > success_limit) || |
| (window->average_tpt > lq_data->last_tpt)) { |
| if (!is_legacy(tbl->lq_type)) { |
| IWL_DEBUG_HT("LQ: we are switching to HT" |
| " rate suc %d current tpt %d" |
| " old tpt %d\n", |
| window->success_ratio, |
| window->average_tpt, |
| lq_data->last_tpt); |
| lq_data->enable_counter = 1; |
| } |
| lq_data->active_tbl = active_tbl; |
| current_tpt = window->average_tpt; |
| } else { |
| tbl->lq_type = LQ_NONE; |
| active_tbl = lq_data->active_tbl; |
| tbl = &(lq_data->lq_info[active_tbl]); |
| |
| index = iwl_rate_index_from_plcp( |
| tbl->current_rate.rate_n_flags); |
| |
| update_lq = 1; |
| current_tpt = lq_data->last_tpt; |
| IWL_DEBUG_HT("XXY GO BACK TO OLD TABLE\n"); |
| } |
| lq_data->search_better_tbl = 0; |
| done_search = 1; |
| goto lq_update; |
| } |
| |
| high_low = rs_get_adjacent_rate(index, rate_scale_index_msk, |
| tbl->lq_type); |
| low = high_low & 0xff; |
| high = (high_low >> 8) & 0xff; |
| |
| 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 = 1; |
| |
| if ((window->success_ratio <= IWL_RATE_DECREASE_TH) || |
| (current_tpt == 0)) { |
| IWL_DEBUG_RATE("decrease rate because of low success_ratio\n"); |
| scale_action = -1; |
| } else if ((low_tpt == IWL_INVALID_VALUE) && |
| (high_tpt == IWL_INVALID_VALUE)) |
| scale_action = 1; |
| else if ((low_tpt != IWL_INVALID_VALUE) && |
| (high_tpt != IWL_INVALID_VALUE) && |
| (low_tpt < current_tpt) && |
| (high_tpt < current_tpt)) |
| scale_action = 0; |
| else { |
| if (high_tpt != IWL_INVALID_VALUE) { |
| if (high_tpt > current_tpt) |
| scale_action = 1; |
| else { |
| IWL_DEBUG_RATE |
| ("decrease rate because of high tpt\n"); |
| scale_action = -1; |
| } |
| } else if (low_tpt != IWL_INVALID_VALUE) { |
| if (low_tpt > current_tpt) { |
| IWL_DEBUG_RATE |
| ("decrease rate because of low tpt\n"); |
| scale_action = -1; |
| } else |
| scale_action = 1; |
| } |
| } |
| |
| if (scale_action == -1) { |
| if ((low != IWL_RATE_INVALID) && |
| ((window->success_ratio > IWL_RATE_HIGH_TH) || |
| (current_tpt > (100 * tbl->expected_tpt[low])))) |
| scale_action = 0; |
| } else if ((scale_action == 1) && |
| (window->success_ratio < IWL_RATE_INCREASE_TH)) |
| scale_action = 0; |
| |
| switch (scale_action) { |
| case -1: |
| if (low != IWL_RATE_INVALID) { |
| update_lq = 1; |
| index = low; |
| } |
| break; |
| case 1: |
| if (high != IWL_RATE_INVALID) { |
| update_lq = 1; |
| index = high; |
| } |
| |
| break; |
| case 0: |
| default: |
| break; |
| } |
| |
| IWL_DEBUG_HT("choose rate scale index %d action %d low %d " |
| "high %d type %d\n", |
| index, scale_action, low, high, tbl->lq_type); |
| |
| lq_update: |
| if (update_lq) { |
| rs_mcs_from_tbl(&mcs_rate, tbl, index, is_green); |
| rs_fill_link_cmd(lq_data, &mcs_rate, &lq_data->lq); |
| rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
| } |
| rs_stay_in_table(lq_data); |
| |
| if (!update_lq && !done_search && !lq_data->stay_in_tbl) { |
| lq_data->last_tpt = current_tpt; |
| |
| if (is_legacy(tbl->lq_type)) |
| rs_move_legacy_other(priv, lq_data, index); |
| else if (is_siso(tbl->lq_type)) |
| rs_move_siso_to_other(priv, lq_data, index); |
| else |
| rs_move_mimo_to_other(priv, lq_data, index); |
| |
| if (lq_data->search_better_tbl) { |
| tbl = &(lq_data->lq_info[(1 - lq_data->active_tbl)]); |
| for (i = 0; i < IWL_RATE_COUNT; i++) |
| rs_rate_scale_clear_window(&(tbl->win[i])); |
| |
| index = iwl_rate_index_from_plcp( |
| tbl->current_rate.rate_n_flags); |
| |
| IWL_DEBUG_HT("Switch current mcs: %X index: %d\n", |
| tbl->current_rate.rate_n_flags, index); |
| rs_fill_link_cmd(lq_data, &tbl->current_rate, |
| &lq_data->lq); |
| rs_send_lq_cmd(priv, &lq_data->lq, CMD_ASYNC); |
| } |
| tbl1 = &(lq_data->lq_info[lq_data->active_tbl]); |
| |
| if (is_legacy(tbl1->lq_type) && |
| #ifdef CONFIG_IWLWIFI_HT |
| !priv->current_assoc_ht.is_ht && |
| #endif |
| (lq_data->action_counter >= 1)) { |
| lq_data->action_counter = 0; |
| IWL_DEBUG_HT("LQ: STAY in legacy table\n"); |
| rs_set_stay_in_table(1, lq_data); |
| } |
| |
| if (lq_data->enable_counter && |
| (lq_data->action_counter >= IWL_ACTION_LIMIT)) { |
| #ifdef CONFIG_IWLWIFI_HT_AGG |
| if ((lq_data->last_tpt > TID_AGG_TPT_THREHOLD) && |
| (priv->lq_mngr.agg_ctrl.auto_agg)) { |
| priv->lq_mngr.agg_ctrl.tid_retry = |
| TID_ALL_SPECIFIED; |
| schedule_work(&priv->agg_work); |
| } |
| #endif /*CONFIG_IWLWIFI_HT_AGG */ |
| lq_data->action_counter = 0; |
| rs_set_stay_in_table(0, lq_data); |
| } |
| } else { |
| if ((!update_lq) && (!done_search) && (!lq_data->flush_timer)) |
| lq_data->flush_timer = jiffies; |
| } |
| |
| out: |
| rs_mcs_from_tbl(&tbl->current_rate, tbl, index, is_green); |
| i = index; |
| sta->last_txrate = i; |
| |
| /* sta->txrate is an index to A mode rates which start |
| * at IWL_FIRST_OFDM_RATE |
| */ |
| if (lq_data->phymode == (u8) MODE_IEEE80211A) |
| sta->txrate = i - IWL_FIRST_OFDM_RATE; |
| else |
| sta->txrate = i; |
| |
| return; |
| } |
| |
| |
| static void rs_initialize_lq(struct iwl_priv *priv, |
| struct sta_info *sta) |
| { |
| int i; |
| struct iwl_rate_scale_priv *lq; |
| struct iwl_scale_tbl_info *tbl; |
| u8 active_tbl = 0; |
| int rate_idx; |
| u8 use_green = rs_use_green(priv); |
| struct iwl_rate mcs_rate; |
| |
| if (!sta || !sta->rate_ctrl_priv) |
| goto out; |
| |
| lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; |
| i = sta->last_txrate; |
| |
| if ((lq->lq.sta_id == 0xff) && |
| (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) |
| goto out; |
| |
| if (!lq->search_better_tbl) |
| active_tbl = lq->active_tbl; |
| else |
| active_tbl = 1 - lq->active_tbl; |
| |
| tbl = &(lq->lq_info[active_tbl]); |
| |
| if ((i < 0) || (i >= IWL_RATE_COUNT)) |
| i = 0; |
| |
| mcs_rate.rate_n_flags = iwl_rates[i].plcp ; |
| mcs_rate.rate_n_flags |= RATE_MCS_ANT_B_MSK; |
| mcs_rate.rate_n_flags &= ~RATE_MCS_ANT_A_MSK; |
| |
| if (i >= IWL_FIRST_CCK_RATE && i <= IWL_LAST_CCK_RATE) |
| mcs_rate.rate_n_flags |= RATE_MCS_CCK_MSK; |
| |
| tbl->antenna_type = ANT_AUX; |
| rs_get_tbl_info_from_mcs(&mcs_rate, priv->phymode, tbl, &rate_idx); |
| if (!rs_is_ant_connected(priv->valid_antenna, tbl->antenna_type)) |
| rs_toggle_antenna(&mcs_rate, tbl); |
| |
| rs_mcs_from_tbl(&mcs_rate, tbl, rate_idx, use_green); |
| tbl->current_rate.rate_n_flags = mcs_rate.rate_n_flags; |
| rs_get_expected_tpt_table(lq, tbl); |
| rs_fill_link_cmd(lq, &mcs_rate, &lq->lq); |
| rs_send_lq_cmd(priv, &lq->lq, CMD_ASYNC); |
| out: |
| return; |
| } |
| |
| static struct ieee80211_rate *rs_get_lowest_rate(struct ieee80211_local |
| *local) |
| { |
| struct ieee80211_hw_mode *mode = local->oper_hw_mode; |
| int i; |
| |
| for (i = 0; i < mode->num_rates; i++) { |
| struct ieee80211_rate *rate = &mode->rates[i]; |
| |
| if (rate->flags & IEEE80211_RATE_SUPPORTED) |
| return rate; |
| } |
| |
| return &mode->rates[0]; |
| } |
| |
| static struct ieee80211_rate *rs_get_rate(void *priv_rate, |
| struct net_device *dev, |
| struct sk_buff *skb, |
| struct rate_control_extra |
| *extra) |
| { |
| |
| int i; |
| struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
| struct sta_info *sta; |
| u16 fc; |
| struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
| struct iwl_rate_scale_priv *lq; |
| |
| IWL_DEBUG_RATE_LIMIT("rate scale calculate new rate for skb\n"); |
| |
| memset(extra, 0, sizeof(*extra)); |
| |
| fc = le16_to_cpu(hdr->frame_control); |
| if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) { |
| /* Send management frames and broadcast/multicast data using |
| * lowest rate. */ |
| /* TODO: this could probably be improved.. */ |
| return rs_get_lowest_rate(local); |
| } |
| |
| sta = sta_info_get(local, hdr->addr1); |
| |
| if (!sta || !sta->rate_ctrl_priv) { |
| if (sta) |
| sta_info_put(sta); |
| return rs_get_lowest_rate(local); |
| } |
| |
| lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; |
| i = sta->last_txrate; |
| |
| if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) { |
| u8 sta_id = iwl_hw_find_station(priv, hdr->addr1); |
| DECLARE_MAC_BUF(mac); |
| |
| if (sta_id == IWL_INVALID_STATION) { |
| IWL_DEBUG_RATE("LQ: ADD station %s\n", |
| print_mac(mac, hdr->addr1)); |
| sta_id = iwl_add_station(priv, |
| hdr->addr1, 0, CMD_ASYNC); |
| } |
| if ((sta_id != IWL_INVALID_STATION)) { |
| lq->lq.sta_id = sta_id; |
| lq->lq.rs_table[0].rate_n_flags = 0; |
| lq->ibss_sta_added = 1; |
| rs_initialize_lq(priv, sta); |
| } |
| if (!lq->ibss_sta_added) |
| goto done; |
| } |
| |
| done: |
| sta_info_put(sta); |
| if ((i < 0) || (i > IWL_RATE_COUNT)) |
| return rs_get_lowest_rate(local); |
| |
| return &priv->ieee_rates[i]; |
| } |
| |
| static void *rs_alloc_sta(void *priv, gfp_t gfp) |
| { |
| struct iwl_rate_scale_priv *crl; |
| int i, j; |
| |
| IWL_DEBUG_RATE("create station rate scale window\n"); |
| |
| crl = kzalloc(sizeof(struct iwl_rate_scale_priv), gfp); |
| |
| if (crl == NULL) |
| return NULL; |
| crl->lq.sta_id = 0xff; |
| |
| |
| for (j = 0; j < LQ_SIZE; j++) |
| for (i = 0; i < IWL_RATE_COUNT; i++) |
| rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); |
| |
| return crl; |
| } |
| |
| static void rs_rate_init(void *priv_rate, void *priv_sta, |
| struct ieee80211_local *local, |
| struct sta_info *sta) |
| { |
| int i, j; |
| struct ieee80211_hw_mode *mode = local->oper_hw_mode; |
| struct iwl_priv *priv = (struct iwl_priv *)priv_rate; |
| struct iwl_rate_scale_priv *crl = priv_sta; |
| |
| crl->flush_timer = 0; |
| crl->supp_rates = sta->supp_rates; |
| sta->txrate = 3; |
| for (j = 0; j < LQ_SIZE; j++) |
| for (i = 0; i < IWL_RATE_COUNT; i++) |
| rs_rate_scale_clear_window(&(crl->lq_info[j].win[i])); |
| |
| IWL_DEBUG_RATE("rate scale global init\n"); |
| /* 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.. */ |
| |
| crl->ibss_sta_added = 0; |
| if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { |
| u8 sta_id = iwl_hw_find_station(priv, sta->addr); |
| DECLARE_MAC_BUF(mac); |
| |
| /* for IBSS the call are from tasklet */ |
| IWL_DEBUG_HT("LQ: ADD station %s\n", |
| print_mac(mac, sta->addr)); |
| |
| if (sta_id == IWL_INVALID_STATION) { |
| IWL_DEBUG_RATE("LQ: ADD station %s\n", |
| print_mac(mac, sta->addr)); |
| sta_id = iwl_add_station(priv, |
| sta->addr, 0, CMD_ASYNC); |
| } |
| if ((sta_id != IWL_INVALID_STATION)) { |
| crl->lq.sta_id = sta_id; |
| crl->lq.rs_table[0].rate_n_flags = 0; |
| } |
| /* FIXME: this is w/a remove it later */ |
| priv->assoc_station_added = 1; |
| } |
| |
| for (i = 0; i < mode->num_rates; i++) { |
| if ((sta->supp_rates & BIT(i)) && |
| (mode->rates[i].flags & IEEE80211_RATE_SUPPORTED)) |
| sta->txrate = i; |
| } |
| sta->last_txrate = sta->txrate; |
| /* For MODE_IEEE80211A mode cck rate are at end |
| * rate table |
| */ |
| if (local->hw.conf.phymode == MODE_IEEE80211A) |
| sta->last_txrate += IWL_FIRST_OFDM_RATE; |
| |
| crl->is_dup = priv->is_dup; |
| crl->valid_antenna = priv->valid_antenna; |
| crl->antenna = priv->antenna; |
| crl->is_green = rs_use_green(priv); |
| crl->active_rate = priv->active_rate; |
| crl->active_rate &= ~(0x1000); |
| crl->active_rate_basic = priv->active_rate_basic; |
| crl->phymode = priv->phymode; |
| #ifdef CONFIG_IWLWIFI_HT |
| crl->active_siso_rate = (priv->current_assoc_ht.supp_rates[0] << 1); |
| crl->active_siso_rate |= (priv->current_assoc_ht.supp_rates[0] & 0x1); |
| crl->active_siso_rate &= ~((u16)0x2); |
| crl->active_siso_rate = crl->active_siso_rate << IWL_FIRST_OFDM_RATE; |
| |
| crl->active_mimo_rate = (priv->current_assoc_ht.supp_rates[1] << 1); |
| crl->active_mimo_rate |= (priv->current_assoc_ht.supp_rates[1] & 0x1); |
| crl->active_mimo_rate &= ~((u16)0x2); |
| crl->active_mimo_rate = crl->active_mimo_rate << IWL_FIRST_OFDM_RATE; |
| IWL_DEBUG_HT("MIMO RATE 0x%X SISO MASK 0x%X\n", crl->active_siso_rate, |
| crl->active_mimo_rate); |
| #endif /*CONFIG_IWLWIFI_HT*/ |
| #ifdef CONFIG_MAC80211_DEBUGFS |
| crl->drv = priv; |
| #endif |
| |
| if (priv->assoc_station_added) |
| priv->lq_mngr.lq_ready = 1; |
| |
| rs_initialize_lq(priv, sta); |
| } |
| |
| static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, |
| struct iwl_rate *tx_mcs, |
| struct iwl_link_quality_cmd *lq_cmd) |
| { |
| int index = 0; |
| int rate_idx; |
| int repeat_rate = 0; |
| u8 ant_toggle_count = 0; |
| u8 use_ht_possible = 1; |
| struct iwl_rate new_rate; |
| struct iwl_scale_tbl_info tbl_type = { 0 }; |
| |
| rs_dbgfs_set_mcs(lq_data, tx_mcs, index); |
| |
| rs_get_tbl_info_from_mcs(tx_mcs, lq_data->phymode, |
| &tbl_type, &rate_idx); |
| |
| if (is_legacy(tbl_type.lq_type)) { |
| ant_toggle_count = 1; |
| repeat_rate = IWL_NUMBER_TRY; |
| } else |
| repeat_rate = IWL_HT_NUMBER_TRY; |
| |
| lq_cmd->general_params.mimo_delimiter = |
| is_mimo(tbl_type.lq_type) ? 1 : 0; |
| lq_cmd->rs_table[index].rate_n_flags = |
| cpu_to_le32(tx_mcs->rate_n_flags); |
| new_rate.rate_n_flags = tx_mcs->rate_n_flags; |
| |
| if (is_mimo(tbl_type.lq_type) || (tbl_type.antenna_type == ANT_MAIN)) |
| lq_cmd->general_params.single_stream_ant_msk = 1; |
| else |
| lq_cmd->general_params.single_stream_ant_msk = 2; |
| |
| index++; |
| repeat_rate--; |
| |
| while (index < LINK_QUAL_MAX_RETRY_NUM) { |
| while (repeat_rate > 0 && (index < LINK_QUAL_MAX_RETRY_NUM)) { |
| if (is_legacy(tbl_type.lq_type)) { |
| if (ant_toggle_count < |
| NUM_TRY_BEFORE_ANTENNA_TOGGLE) |
| ant_toggle_count++; |
| else { |
| rs_toggle_antenna(&new_rate, &tbl_type); |
| ant_toggle_count = 1; |
| } |
| } |
| |
| rs_dbgfs_set_mcs(lq_data, &new_rate, index); |
| lq_cmd->rs_table[index].rate_n_flags = |
| cpu_to_le32(new_rate.rate_n_flags); |
| repeat_rate--; |
| index++; |
| } |
| |
| rs_get_tbl_info_from_mcs(&new_rate, lq_data->phymode, &tbl_type, |
| &rate_idx); |
| |
| if (is_mimo(tbl_type.lq_type)) |
| lq_cmd->general_params.mimo_delimiter = index; |
| |
| rs_get_lower_rate(lq_data, &tbl_type, rate_idx, |
| use_ht_possible, &new_rate); |
| |
| if (is_legacy(tbl_type.lq_type)) { |
| if (ant_toggle_count < NUM_TRY_BEFORE_ANTENNA_TOGGLE) |
| ant_toggle_count++; |
| else { |
| rs_toggle_antenna(&new_rate, &tbl_type); |
| ant_toggle_count = 1; |
| } |
| repeat_rate = IWL_NUMBER_TRY; |
| } else |
| repeat_rate = IWL_HT_NUMBER_TRY; |
| |
| use_ht_possible = 0; |
| |
| rs_dbgfs_set_mcs(lq_data, &new_rate, index); |
| lq_cmd->rs_table[index].rate_n_flags = |
| cpu_to_le32(new_rate.rate_n_flags); |
| |
| index++; |
| repeat_rate--; |
| } |
| |
| lq_cmd->general_params.dual_stream_ant_msk = 3; |
| lq_cmd->agg_params.agg_dis_start_th = 3; |
| lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000); |
| } |
| |
| static void *rs_alloc(struct ieee80211_local *local) |
| { |
| return local->hw.priv; |
| } |
| /* rate scale requires free function to be implemented */ |
| static void rs_free(void *priv_rate) |
| { |
| return; |
| } |
| |
| static void rs_clear(void *priv_rate) |
| { |
| struct iwl_priv *priv = (struct iwl_priv *) priv_rate; |
| |
| IWL_DEBUG_RATE("enter\n"); |
| |
| priv->lq_mngr.lq_ready = 0; |
| #ifdef CONFIG_IWLWIFI_HT |
| #ifdef CONFIG_IWLWIFI_HT_AGG |
| if (priv->lq_mngr.agg_ctrl.granted_ba) |
| iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED); |
| #endif /*CONFIG_IWLWIFI_HT_AGG */ |
| #endif /* CONFIG_IWLWIFI_HT */ |
| |
| IWL_DEBUG_RATE("leave\n"); |
| } |
| |
| static void rs_free_sta(void *priv, void *priv_sta) |
| { |
| struct iwl_rate_scale_priv *rs_priv = priv_sta; |
| |
| IWL_DEBUG_RATE("enter\n"); |
| kfree(rs_priv); |
| IWL_DEBUG_RATE("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_rate_scale_priv *rs_priv, |
| struct iwl_rate *mcs, int index) |
| { |
| const u32 cck_rate = 0x820A; |
| if (rs_priv->dbg_fixed.rate_n_flags) { |
| if (index < 12) |
| mcs->rate_n_flags = rs_priv->dbg_fixed.rate_n_flags; |
| else |
| mcs->rate_n_flags = cck_rate; |
| IWL_DEBUG_RATE("Fixed rate ON\n"); |
| return; |
| } |
| |
| IWL_DEBUG_RATE("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_rate_scale_priv *rs_priv = file->private_data; |
| char buf[64]; |
| int buf_size; |
| u32 parsed_rate; |
| |
| 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) |
| rs_priv->dbg_fixed.rate_n_flags = parsed_rate; |
| else |
| rs_priv->dbg_fixed.rate_n_flags = 0; |
| |
| rs_priv->active_rate = 0x0FFF; |
| rs_priv->active_siso_rate = 0x1FD0; |
| rs_priv->active_mimo_rate = 0x1FD0; |
| |
| IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", |
| rs_priv->lq.sta_id, rs_priv->dbg_fixed.rate_n_flags); |
| |
| if (rs_priv->dbg_fixed.rate_n_flags) { |
| rs_fill_link_cmd(rs_priv, &rs_priv->dbg_fixed, &rs_priv->lq); |
| rs_send_lq_cmd(rs_priv->drv, &rs_priv->lq, CMD_ASYNC); |
| } |
| |
| 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[1024]; |
| int desc = 0; |
| int i = 0; |
| |
| struct iwl_rate_scale_priv *rs_priv = file->private_data; |
| |
| desc += sprintf(buff+desc, "sta_id %d\n", rs_priv->lq.sta_id); |
| desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", |
| rs_priv->total_failed, rs_priv->total_success, |
| rs_priv->active_rate); |
| desc += sprintf(buff+desc, "fixed rate 0x%X\n", |
| rs_priv->dbg_fixed.rate_n_flags); |
| desc += sprintf(buff+desc, "general:" |
| "flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", |
| rs_priv->lq.general_params.flags, |
| rs_priv->lq.general_params.mimo_delimiter, |
| rs_priv->lq.general_params.single_stream_ant_msk, |
| rs_priv->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(rs_priv->lq.agg_params.agg_time_limit), |
| rs_priv->lq.agg_params.agg_dis_start_th, |
| rs_priv->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", |
| rs_priv->lq.general_params.start_rate_index[0], |
| rs_priv->lq.general_params.start_rate_index[1], |
| rs_priv->lq.general_params.start_rate_index[2], |
| rs_priv->lq.general_params.start_rate_index[3]); |
| |
| |
| for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) |
| desc += sprintf(buff+desc, " rate[%d] 0x%X\n", |
| i, le32_to_cpu(rs_priv->lq.rs_table[i].rate_n_flags)); |
| |
| return simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
| } |
| |
| 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, |
| }; |
| static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, |
| char __user *user_buf, size_t count, loff_t *ppos) |
| { |
| char buff[1024]; |
| int desc = 0; |
| int i, j; |
| |
| struct iwl_rate_scale_priv *rs_priv = file->private_data; |
| for (i = 0; i < LQ_SIZE; i++) { |
| desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" |
| "rate=0x%X\n", |
| rs_priv->active_tbl == i?"*":"x", |
| rs_priv->lq_info[i].lq_type, |
| rs_priv->lq_info[i].is_SGI, |
| rs_priv->lq_info[i].is_fat, |
| rs_priv->lq_info[i].is_dup, |
| rs_priv->lq_info[i].current_rate.rate_n_flags); |
| for (j = 0; j < IWL_RATE_COUNT; j++) { |
| desc += sprintf(buff+desc, |
| "counter=%d success=%d %%=%d\n", |
| rs_priv->lq_info[i].win[j].counter, |
| rs_priv->lq_info[i].win[j].success_counter, |
| rs_priv->lq_info[i].win[j].success_ratio); |
| } |
| } |
| return simple_read_from_buffer(user_buf, count, ppos, buff, desc); |
| } |
| |
| static const struct file_operations rs_sta_dbgfs_stats_table_ops = { |
| .read = rs_sta_dbgfs_stats_table_read, |
| .open = open_file_generic, |
| }; |
| |
| static void rs_add_debugfs(void *priv, void *priv_sta, |
| struct dentry *dir) |
| { |
| struct iwl_rate_scale_priv *rs_priv = priv_sta; |
| rs_priv->rs_sta_dbgfs_scale_table_file = |
| debugfs_create_file("rate_scale_table", 0600, dir, |
| rs_priv, &rs_sta_dbgfs_scale_table_ops); |
| rs_priv->rs_sta_dbgfs_stats_table_file = |
| debugfs_create_file("rate_stats_table", 0600, dir, |
| rs_priv, &rs_sta_dbgfs_stats_table_ops); |
| } |
| |
| static void rs_remove_debugfs(void *priv, void *priv_sta) |
| { |
| struct iwl_rate_scale_priv *rs_priv = priv_sta; |
| debugfs_remove(rs_priv->rs_sta_dbgfs_scale_table_file); |
| debugfs_remove(rs_priv->rs_sta_dbgfs_stats_table_file); |
| } |
| #endif |
| |
| 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, |
| .clear = rs_clear, |
| .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 iwl_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) |
| { |
| struct ieee80211_local *local = hw_to_local(hw); |
| struct iwl_priv *priv = hw->priv; |
| struct iwl_rate_scale_priv *rs_priv; |
| struct sta_info *sta; |
| int count = 0, i; |
| u32 samples = 0, success = 0, good = 0; |
| unsigned long now = jiffies; |
| u32 max_time = 0; |
| u8 lq_type, antenna; |
| |
| sta = sta_info_get(local, priv->stations[sta_id].sta.sta.addr); |
| if (!sta || !sta->rate_ctrl_priv) { |
| if (sta) { |
| sta_info_put(sta); |
| IWL_DEBUG_RATE("leave - no private rate data!\n"); |
| } else |
| IWL_DEBUG_RATE("leave - no station!\n"); |
| return sprintf(buf, "station %d not found\n", sta_id); |
| } |
| |
| rs_priv = (void *)sta->rate_ctrl_priv; |
| |
| lq_type = rs_priv->lq_info[rs_priv->active_tbl].lq_type; |
| antenna = rs_priv->lq_info[rs_priv->active_tbl].antenna_type; |
| |
| if (is_legacy(lq_type)) |
| i = IWL_RATE_54M_INDEX; |
| else |
| i = IWL_RATE_60M_INDEX; |
| while (1) { |
| u64 mask; |
| int j; |
| int active = rs_priv->active_tbl; |
| |
| count += |
| sprintf(&buf[count], " %2dMbs: ", iwl_rates[i].ieee / 2); |
| |
| mask = (1ULL << (IWL_RATE_MAX_WINDOW - 1)); |
| for (j = 0; j < IWL_RATE_MAX_WINDOW; j++, mask >>= 1) |
| buf[count++] = |
| (rs_priv->lq_info[active].win[i].data & mask) |
| ? '1' : '0'; |
| |
| samples += rs_priv->lq_info[active].win[i].counter; |
| good += rs_priv->lq_info[active].win[i].success_counter; |
| success += rs_priv->lq_info[active].win[i].success_counter * |
| iwl_rates[i].ieee; |
| |
| if (rs_priv->lq_info[active].win[i].stamp) { |
| int delta = |
| jiffies_to_msecs(now - |
| rs_priv->lq_info[active].win[i].stamp); |
| |
| if (delta > max_time) |
| max_time = delta; |
| |
| count += sprintf(&buf[count], "%5dms\n", delta); |
| } else |
| buf[count++] = '\n'; |
| |
| j = iwl_get_prev_ieee_rate(i); |
| if (j == i) |
| break; |
| i = j; |
| } |
| |
| /* Display the average rate of all samples taken. |
| * |
| * NOTE: We multiple # of samples by 2 since the IEEE measurement |
| * added from iwl_rates is actually 2X the rate */ |
| if (samples) |
| count += sprintf(&buf[count], |
| "\nAverage rate is %3d.%02dMbs over last %4dms\n" |
| "%3d%% success (%d good packets over %d tries)\n", |
| success / (2 * samples), (success * 5 / samples) % 10, |
| max_time, good * 100 / samples, good, samples); |
| else |
| count += sprintf(&buf[count], "\nAverage rate: 0Mbs\n"); |
| count += sprintf(&buf[count], "\nrate scale type %d anntena %d " |
| "active_search %d rate index %d\n", lq_type, antenna, |
| rs_priv->search_better_tbl, sta->last_txrate); |
| |
| sta_info_put(sta); |
| return count; |
| } |
| |
| void iwl_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) |
| { |
| struct iwl_priv *priv = hw->priv; |
| |
| priv->lq_mngr.lq_ready = 1; |
| } |
| |
| void iwl_rate_control_register(struct ieee80211_hw *hw) |
| { |
| ieee80211_rate_control_register(&rs_ops); |
| } |
| |
| void iwl_rate_control_unregister(struct ieee80211_hw *hw) |
| { |
| ieee80211_rate_control_unregister(&rs_ops); |
| } |
| |