diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-4965-rs.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-4965-rs.c | 1534 |
1 files changed, 933 insertions, 601 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c index 8dc78c0bf1ff..d06462264147 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c +++ b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c @@ -36,11 +36,9 @@ #include <linux/workqueue.h> -#define IWL 4965 - #include "../net/mac80211/ieee80211_rate.h" -#include "iwlwifi.h" +#include "iwl-4965.h" #include "iwl-helpers.h" #define RS_NAME "iwl-4965-rs" @@ -49,13 +47,12 @@ #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 */ +#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 time to accum history 2 seconds */ +#define IWL_RATE_SCALE_FLUSH_INTVL (2*HZ) static u8 rs_ht_to_legacy[] = { IWL_RATE_6M_INDEX, IWL_RATE_6M_INDEX, @@ -67,83 +64,109 @@ static u8 rs_ht_to_legacy[] = { IWL_RATE_48M_INDEX, IWL_RATE_54M_INDEX }; -struct iwl_rate { +struct iwl4965_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; +/** + * struct iwl4965_rate_scale_data -- tx success history for one rate + */ +struct iwl4965_rate_scale_data { + u64 data; /* bitmap of successful frames */ + s32 success_counter; /* number of frames successful */ + s32 success_ratio; /* per-cent * 128 */ + s32 counter; /* number of frames attempted */ + s32 average_tpt; /* success ratio * expected throughput */ 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 iwl4965_scale_tbl_info -- tx params and success history for all rates + * + * There are two of these in struct iwl_rate_scale_priv, + * one for "active", and one for "search". + */ +struct iwl4965_scale_tbl_info { + enum iwl4965_table_type lq_type; + enum iwl4965_antenna_type antenna_type; + u8 is_SGI; /* 1 = short guard interval */ + u8 is_fat; /* 1 = 40 MHz channel width */ + u8 is_dup; /* 1 = duplicated data streams */ + u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */ + s32 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */ + struct iwl4965_rate current_rate; /* rate_n_flags, uCode API format */ + struct iwl4965_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */ }; -struct iwl_rate_scale_priv { - u8 active_tbl; - u8 enable_counter; - u8 stay_in_tbl; - u8 search_better_tbl; +/** + * struct iwl_rate_scale_priv -- driver's rate scaling private structure + * + * Pointer to this gets passed back and forth between driver and mac80211. + */ +struct iwl4965_lq_sta { + u8 active_tbl; /* index of active table, range 0-1 */ + u8 enable_counter; /* indicates HT mode */ + u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */ + u8 search_better_tbl; /* 1: currently trying alternate mode */ s32 last_tpt; + + /* The following determine when to search for a new mode */ u32 table_count_limit; - u32 max_failure_limit; - u32 max_success_limit; + u32 max_failure_limit; /* # failed frames before new search */ + u32 max_success_limit; /* # successful frames before new search */ u32 table_count; - u32 total_failed; - u32 total_success; - u32 flush_timer; - u8 action_counter; + u32 total_failed; /* total failed frames, any/all rates */ + u32 total_success; /* total successful frames, any/all rates */ + u32 flush_timer; /* time staying in mode before new search */ + + u8 action_counter; /* # mode-switch actions tried */ u8 antenna; u8 valid_antenna; u8 is_green; u8 is_dup; u8 phymode; u8 ibss_sta_added; + + /* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */ 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]; + + struct iwl4965_link_quality_cmd lq; + struct iwl4965_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */ #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; + struct iwl4965_rate dbg_fixed; + struct iwl4965_priv *drv; #endif }; -static void rs_rate_scale_perform(struct iwl_priv *priv, +static void rs_rate_scale_perform(struct iwl4965_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); +static void rs_fill_link_cmd(struct iwl4965_lq_sta *lq_sta, + struct iwl4965_rate *tx_mcs, + struct iwl4965_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); +static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, + struct iwl4965_rate *mcs, int index); #else -static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, - struct iwl_rate *mcs, int index) +static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, + struct iwl4965_rate *mcs, int index) {} #endif + +/* + * Expected throughput metrics for following rates: + * 1, 2, 5.5, 11, 6, 9, 12, 18, 24, 36, 48, 54, 60 MBits + * "G" is the only table that supports CCK (the first 4 rates). + */ static s32 expected_tpt_A[IWL_RATE_COUNT] = { 0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186, 186 }; @@ -184,36 +207,34 @@ 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) +static int iwl4965_lq_sync_callback(struct iwl4965_priv *priv, + struct iwl4965_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) +static inline u8 iwl4965_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) +static int rs_send_lq_cmd(struct iwl4965_priv *priv, + struct iwl4965_link_quality_cmd *lq, u8 flags) { -#ifdef CONFIG_IWLWIFI_DEBUG +#ifdef CONFIG_IWL4965_DEBUG int i; #endif - int rc = -1; - - struct iwl_host_cmd cmd = { + struct iwl4965_host_cmd cmd = { .id = REPLY_TX_LINK_QUALITY_CMD, - .len = sizeof(struct iwl_link_quality_cmd), + .len = sizeof(struct iwl4965_link_quality_cmd), .meta.flags = flags, .data = lq, }; if ((lq->sta_id == 0xFF) && (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) - return rc; + return -EINVAL; if (lq->sta_id == 0xFF) lq->sta_id = IWL_AP_ID; @@ -222,23 +243,23 @@ static int rs_send_lq_cmd(struct iwl_priv *priv, 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 +#ifdef CONFIG_IWL4965_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; + cmd.meta.u.callback = iwl4965_lq_sync_callback; - if (iwl_is_associated(priv) && priv->assoc_station_added && + if (iwl4965_is_associated(priv) && priv->assoc_station_added && priv->lq_mngr.lq_ready) - rc = iwl_send_cmd(priv, &cmd); + return iwl4965_send_cmd(priv, &cmd); - return rc; + return 0; } -static int rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) +static void rs_rate_scale_clear_window(struct iwl4965_rate_scale_data *window) { window->data = 0; window->success_counter = 0; @@ -246,29 +267,38 @@ static int rs_rate_scale_clear_window(struct iwl_rate_scale_data *window) 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, +/** + * 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 iwl4965_rate_scale_data *windows, int scale_index, s32 tpt, u32 status) { - int rc = 0; - struct iwl_rate_scale_data *window = NULL; + struct iwl4965_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; + if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) + return -EINVAL; + /* Select data for current tx bit rate */ window = &(windows[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!). + */ if (window->counter >= win_size) { - window->counter = win_size - 1; mask = 1; mask = (mask << (win_size - 1)); @@ -278,7 +308,11 @@ static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, } } + /* Increment frames-attempted counter */ window->counter = window->counter + 1; + + /* Shift bitmap by one frame (throw away oldest history), + * OR in "1", and increment "success" if this frame was successful. */ mask = window->data; window->data = (mask << 1); if (status != 0) { @@ -286,6 +320,7 @@ static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, window->data |= 0x1; } + /* Calculate current success ratio, avoid divide-by-0! */ if (window->counter > 0) window->success_ratio = 128 * (100 * window->success_counter) / window->counter; @@ -294,37 +329,40 @@ static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, 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 rc; + return 0; } -int static rs_mcs_from_tbl(struct iwl_rate *mcs_rate, - struct iwl_scale_tbl_info *tbl, +/* + * Fill uCode API rate_n_flags field, based on "search" or "active" table. + */ +static void rs_mcs_from_tbl(struct iwl4965_rate *mcs_rate, + struct iwl4965_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; + mcs_rate->rate_n_flags = iwl4965_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 | + mcs_rate->rate_n_flags = iwl4965_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 | + mcs_rate->rate_n_flags = iwl4965_rates[index].plcp_mimo | RATE_MCS_HT_MSK; } @@ -343,7 +381,7 @@ int static rs_mcs_from_tbl(struct iwl_rate *mcs_rate, } if (is_legacy(tbl->lq_type)) - return rc; + return; if (tbl->is_fat) { if (tbl->is_dup) @@ -359,27 +397,31 @@ int static rs_mcs_from_tbl(struct iwl_rate *mcs_rate, 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, +/* + * Interpret uCode API's rate_n_flags format, + * fill "search" or "active" tx mode table. + */ +static int rs_get_tbl_info_from_mcs(const struct iwl4965_rate *mcs_rate, + int phymode, struct iwl4965_scale_tbl_info *tbl, int *rate_idx) { int index; u32 ant_msk; - index = iwl_rate_index_from_plcp(mcs_rate->rate_n_flags); + index = iwl4965_rate_index_from_plcp(mcs_rate->rate_n_flags); if (index == IWL_RATE_INVALID) { *rate_idx = -1; - return -1; + return -EINVAL; } - tbl->is_SGI = 0; + tbl->is_SGI = 0; /* default legacy setup */ tbl->is_fat = 0; tbl->is_dup = 0; - tbl->antenna_type = ANT_BOTH; + tbl->antenna_type = ANT_BOTH; /* default MIMO setup */ + /* legacy rate format */ if (!(mcs_rate->rate_n_flags & RATE_MCS_HT_MSK)) { ant_msk = (mcs_rate->rate_n_flags & RATE_MCS_ANT_AB_MSK); @@ -399,7 +441,8 @@ static int rs_get_tbl_info_from_mcs(const struct iwl_rate *mcs_rate, } *rate_idx = index; - } else if (iwl_rate_get_rate(mcs_rate->rate_n_flags) + /* HT rate format, SISO (might be 20 MHz legacy or 40 MHz fat width) */ + } else if (iwl4965_rate_get_rate(mcs_rate->rate_n_flags) <= IWL_RATE_SISO_60M_PLCP) { tbl->lq_type = LQ_SISO; @@ -423,6 +466,8 @@ static int rs_get_tbl_info_from_mcs(const struct iwl_rate *mcs_rate, tbl->is_dup = 1; *rate_idx = index; + + /* HT rate format, MIMO (might be 20 MHz legacy or 40 MHz fat width) */ } else { tbl->lq_type = LQ_MIMO; if (mcs_rate->rate_n_flags & RATE_MCS_SGI_MSK) @@ -439,8 +484,8 @@ static int rs_get_tbl_info_from_mcs(const struct iwl_rate *mcs_rate, return 0; } -static inline void rs_toggle_antenna(struct iwl_rate *new_rate, - struct iwl_scale_tbl_info *tbl) +static inline void rs_toggle_antenna(struct iwl4965_rate *new_rate, + struct iwl4965_scale_tbl_info *tbl) { if (tbl->antenna_type == ANT_AUX) { tbl->antenna_type = ANT_MAIN; @@ -453,18 +498,15 @@ static inline void rs_toggle_antenna(struct iwl_rate *new_rate, } } -static inline s8 rs_use_green(struct iwl_priv *priv) +static inline u8 rs_use_green(struct iwl4965_priv *priv, + struct ieee80211_conf *conf) { - 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; +#ifdef CONFIG_IWL4965_HT + return ((conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) && + priv->current_ht_config.is_green_field && + !priv->current_ht_config.non_GF_STA_present); +#endif /* CONFIG_IWL4965_HT */ + return 0; } /** @@ -474,23 +516,24 @@ static inline s8 rs_use_green(struct iwl_priv *priv) * basic available rates. * */ -static void rs_get_supported_rates(struct iwl_rate_scale_priv *lq_data, +static void rs_get_supported_rates(struct iwl4965_lq_sta *lq_sta, struct ieee80211_hdr *hdr, - enum iwl_table_type rate_type, + enum iwl4965_table_type rate_type, u16 *data_rate) { if (is_legacy(rate_type)) - *data_rate = lq_data->active_rate; + *data_rate = lq_sta->active_rate; else { if (is_siso(rate_type)) - *data_rate = lq_data->active_siso_rate; + *data_rate = lq_sta->active_siso_rate; else - *data_rate = lq_data->active_mimo_rate; + *data_rate = lq_sta->active_mimo_rate; } if (hdr && is_multicast_ether_addr(hdr->addr1) && - lq_data->active_rate_basic) - *data_rate = lq_data->active_rate_basic; + lq_sta->active_rate_basic) { + *data_rate = lq_sta->active_rate_basic; + } } static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) @@ -498,7 +541,7 @@ 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 + /* 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; @@ -527,7 +570,7 @@ static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) low = index; while (low != IWL_RATE_INVALID) { - low = iwl_rates[low].prev_rs; + low = iwl4965_rates[low].prev_rs; if (low == IWL_RATE_INVALID) break; if (rate_mask & (1 << low)) @@ -537,7 +580,7 @@ static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) high = index; while (high != IWL_RATE_INVALID) { - high = iwl_rates[high].next_rs; + high = iwl4965_rates[high].next_rs; if (high == IWL_RATE_INVALID) break; if (rate_mask & (1 << high)) @@ -548,15 +591,15 @@ static u16 rs_get_adjacent_rate(u8 index, u16 rate_mask, int rate_type) 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) +static void rs_get_lower_rate(struct iwl4965_lq_sta *lq_sta, + struct iwl4965_scale_tbl_info *tbl, u8 scale_index, + u8 ht_possible, struct iwl4965_rate *mcs_rate) { s32 low; u16 rate_mask; u16 high_low; u8 switch_to_legacy = 0; - u8 is_green = lq_data->is_green; + u8 is_green = lq_sta->is_green; /* check if we need to switch from HT to legacy rates. * assumption is that mandatory rates (1Mbps or 6Mbps) @@ -564,7 +607,7 @@ static int rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data, 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) + if (lq_sta->phymode == MODE_IEEE80211A) tbl->lq_type = LQ_A; else tbl->lq_type = LQ_G; @@ -577,22 +620,22 @@ static int rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data, tbl->is_SGI = 0; } - rs_get_supported_rates(lq_data, NULL, tbl->lq_type, &rate_mask); + rs_get_supported_rates(lq_sta, NULL, tbl->lq_type, &rate_mask); - /* mask with station rate restriction */ + /* Mask with station rate restriction */ if (is_legacy(tbl->lq_type)) { - if (lq_data->phymode == (u8) MODE_IEEE80211A) + /* supp_rates has no CCK bits in A mode */ + if (lq_sta->phymode == (u8) MODE_IEEE80211A) rate_mask = (u16)(rate_mask & - (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); + (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); else - rate_mask = (u16)(rate_mask & lq_data->supp_rates); + rate_mask = (u16)(rate_mask & lq_sta->supp_rates); } - /* if we did switched from HT to legacy check current rate */ - if ((switch_to_legacy) && - (rate_mask & (1 << scale_index))) { + /* If we 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; + return; } high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type); @@ -602,29 +645,29 @@ static int rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data, 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, +/* + * mac80211 sends us Tx status + */ +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 iwl4965_lq_sta *lq_sta; + struct iwl4965_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 iwl4965_priv *priv = (struct iwl4965_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; + struct iwl4965_rate_scale_data *window = NULL; + struct iwl4965_rate_scale_data *search_win = NULL; + struct iwl4965_rate tx_mcs; + struct iwl4965_scale_tbl_info tbl_type; + struct iwl4965_scale_tbl_info *curr_tbl, *search_tbl; u8 active_index = 0; u16 fc = le16_to_cpu(hdr->frame_control); s32 tpt = 0; @@ -648,27 +691,32 @@ static void rs_tx_status(void *priv_rate, return; } - lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; + lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; if (!priv->lq_mngr.lq_ready) return; - if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && !lq->ibss_sta_added) + if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && + !lq_sta->ibss_sta_added) return; - table = &lq->lq; - active_index = lq->active_tbl; + table = &lq_sta->lq; + active_index = lq_sta->active_tbl; - lq->antenna = (lq->valid_antenna & local->hw.conf.antenna_sel_tx); - if (!lq->antenna) - lq->antenna = lq->valid_antenna; + /* Get mac80211 antenna info */ + lq_sta->antenna = + (lq_sta->valid_antenna & local->hw.conf.antenna_sel_tx); + if (!lq_sta->antenna) + lq_sta->antenna = lq_sta->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 *) + /* Ignore mac80211 antenna info for now */ + lq_sta->antenna = lq_sta->valid_antenna; + + curr_tbl = &(lq_sta->lq_info[active_index]); + search_tbl = &(lq_sta->lq_info[(1 - active_index)]); + window = (struct iwl4965_rate_scale_data *) &(curr_tbl->win[0]); - search_win = (struct iwl_rate_scale_data *) + search_win = (struct iwl4965_rate_scale_data *) &(search_tbl->win[0]); tx_mcs.rate_n_flags = tx_resp->control.tx_rate; @@ -682,6 +730,14 @@ static void rs_tx_status(void *priv_rate, 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). + */ if (retries && (tx_mcs.rate_n_flags != le32_to_cpu(table->rs_table[0].rate_n_flags))) { @@ -692,12 +748,17 @@ static void rs_tx_status(void *priv_rate, return; } + /* Update frame history window with "failure" for each Tx retry. */ while (retries) { + /* Look up the rate and other info used for each tx attempt. + * Each tx attempt steps one entry deeper in the rate table. */ 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 type matches "search" table, + * add failure to "search" history */ 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)) { @@ -705,8 +766,10 @@ static void rs_tx_status(void *priv_rate, tpt = search_tbl->expected_tpt[rs_index]; else tpt = 0; - rs_collect_tx_data(search_win, - rs_index, tpt, 0); + rs_collect_tx_data(search_win, rs_index, tpt, 0); + + /* Else if type matches "current/active" table, + * add failure to "current/active" history */ } 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)) { @@ -716,13 +779,21 @@ static void rs_tx_status(void *priv_rate, tpt = 0; rs_collect_tx_data(window, rs_index, tpt, 0); } - if (lq->stay_in_tbl) - lq->total_failed++; + + /* If not searching for a new mode, increment failed counter + * ... this helps determine when to start searching again */ + if (lq_sta->stay_in_tbl) + lq_sta->total_failed++; --retries; index++; } + /* + * Find (by rate) the history window to update with final Tx attempt; + * if Tx was successful first try, use original rate, + * else look up the rate that was, finally, successful. + */ if (!tx_resp->retry_count) tx_mcs.rate_n_flags = tx_resp->control.tx_rate; else @@ -732,11 +803,14 @@ static void rs_tx_status(void *priv_rate, rs_get_tbl_info_from_mcs(&tx_mcs, priv->phymode, &tbl_type, &rs_index); + /* Update frame history window with "success" if Tx got ACKed ... */ if (tx_resp->flags & IEEE80211_TX_STATUS_ACK) status = 1; else status = 0; + /* If type matches "search" table, + * add final tx status to "search" history */ 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)) { @@ -746,6 +820,9 @@ static void rs_tx_status(void *priv_rate, tpt = 0; rs_collect_tx_data(search_win, rs_index, tpt, status); + + /* Else if type matches "current/active" table, + * add final tx status to "current/active" history */ } 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)) { @@ -756,67 +833,77 @@ static void rs_tx_status(void *priv_rate, rs_collect_tx_data(window, rs_index, tpt, status); } - if (lq->stay_in_tbl) { + /* If not searching for new mode, increment success/failed counter + * ... these help determine when to start searching again */ + if (lq_sta->stay_in_tbl) { if (status) - lq->total_success++; + lq_sta->total_success++; else - lq->total_failed++; + lq_sta->total_failed++; } + /* See if there's a better rate or modulation mode to try. */ 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) + enum iwl4965_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; - } + else if (antenna_type == ANT_BOTH) + return ((valid_antenna & 0x3) == 0x3); return 1; } static u8 rs_is_other_ant_connected(u8 valid_antenna, - enum iwl_antenna_type antenna_type) + enum iwl4965_antenna_type antenna_type) { if (antenna_type == ANT_AUX) - return (rs_is_ant_connected(valid_antenna, ANT_MAIN)); + return rs_is_ant_connected(valid_antenna, ANT_MAIN); else - return (rs_is_ant_connected(valid_antenna, ANT_AUX)); + return rs_is_ant_connected(valid_antenna, ANT_AUX); return 0; } +/* + * 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(u8 is_legacy, - struct iwl_rate_scale_priv *lq_data) + struct iwl4965_lq_sta *lq_sta) { IWL_DEBUG_HT("we are staying in the same table\n"); - lq_data->stay_in_tbl = 1; + lq_sta->stay_in_tbl = 1; /* only place this gets set */ 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; + 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_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_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_data->table_count = 0; - lq_data->total_failed = 0; - lq_data->total_success = 0; + lq_sta->table_count = 0; + lq_sta->total_failed = 0; + lq_sta->total_success = 0; } -static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv *lq_data, - struct iwl_scale_tbl_info *tbl) +/* + * Find correct throughput table for given mode of modulation + */ +static void rs_get_expected_tpt_table(struct iwl4965_lq_sta *lq_sta, + struct iwl4965_scale_tbl_info *tbl) { if (is_legacy(tbl->lq_type)) { if (!is_a_band(tbl->lq_type)) @@ -824,7 +911,7 @@ static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv *lq_data, 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_fat && !lq_sta->is_dup) if (tbl->is_SGI) tbl->expected_tpt = expected_tpt_siso40MHzSGI; else @@ -835,7 +922,7 @@ static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv *lq_data, tbl->expected_tpt = expected_tpt_siso20MHz; } else if (is_mimo(tbl->lq_type)) { - if (tbl->is_fat && !lq_data->is_dup) + if (tbl->is_fat && !lq_sta->is_dup) if (tbl->is_SGI) tbl->expected_tpt = expected_tpt_mimo40MHzSGI; else @@ -848,18 +935,34 @@ static void rs_get_expected_tpt_table(struct iwl_rate_scale_priv *lq_data, 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, +#ifdef CONFIG_IWL4965_HT +/* + * 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 iwl4965_priv *priv, + struct iwl4965_lq_sta *lq_sta, + struct iwl4965_scale_tbl_info *tbl, /* "search" */ 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; + /* "active" values */ + struct iwl4965_scale_tbl_info *active_tbl = + &(lq_sta->lq_info[lq_sta->active_tbl]); s32 active_sr = active_tbl->win[index].success_ratio; - s32 *tpt_tbl = tbl->expected_tpt; 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; new_rate = high = low = start_hi = IWL_RATE_INVALID; @@ -870,28 +973,60 @@ static s32 rs_get_best_rate(struct iwl_priv *priv, low = high_low & 0xff; high = (high_low >> 8) & 0xff; - if ((((100 * tpt_tbl[rate]) > lq_data->last_tpt) && + /* + * 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; @@ -901,58 +1036,64 @@ static s32 rs_get_best_rate(struct iwl_priv *priv, return new_rate; } -#endif /* CONFIG_IWLWIFI_HT */ +#endif /* CONFIG_IWL4965_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) +/* + * Set up search table for MIMO + */ +static int rs_switch_to_mimo(struct iwl4965_priv *priv, + struct iwl4965_lq_sta *lq_sta, + struct ieee80211_conf *conf, + struct sta_info *sta, + struct iwl4965_scale_tbl_info *tbl, int index) { - int rc = -1; -#ifdef CONFIG_IWLWIFI_HT +#ifdef CONFIG_IWL4965_HT u16 rate_mask; s32 rate; - s8 is_green = lq_data->is_green; + s8 is_green = lq_sta->is_green; - if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht) + if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || + !sta->ht_info.ht_supported) 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, + rs_get_supported_rates(lq_sta, NULL, tbl->lq_type, &rate_mask); - if (priv->current_assoc_ht.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) + if (priv->current_ht_config.tx_mimo_ps_mode == IWL_MIMO_PS_STATIC) return -1; - if (!rs_is_both_ant_supp(lq_data->antenna)) + /* Need both Tx chains/antennas to support MIMO */ + if (!rs_is_both_ant_supp(lq_sta->antenna)) return -1; - rc = 0; - tbl->is_dup = lq_data->is_dup; + tbl->is_dup = lq_sta->is_dup; tbl->action = 0; - if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) + if (priv->current_ht_config.supported_chan_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) + if (priv->current_ht_config.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) + } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) tbl->is_SGI = 1; else tbl->is_SGI = 0; - rs_get_expected_tpt_table(lq_data, tbl); + rs_get_expected_tpt_table(lq_sta, tbl); - rate = rs_get_best_rate(priv, lq_data, tbl, rate_mask, index, index); + rate = rs_get_best_rate(priv, lq_sta, 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)) @@ -961,43 +1102,49 @@ static int rs_switch_to_mimo(struct iwl_priv *priv, 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; + return 0; +#else + return -1; +#endif /*CONFIG_IWL4965_HT */ } -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) +/* + * Set up search table for SISO + */ +static int rs_switch_to_siso(struct iwl4965_priv *priv, + struct iwl4965_lq_sta *lq_sta, + struct ieee80211_conf *conf, + struct sta_info *sta, + struct iwl4965_scale_tbl_info *tbl, int index) { - int rc = -1; -#ifdef CONFIG_IWLWIFI_HT +#ifdef CONFIG_IWL4965_HT u16 rate_mask; - u8 is_green = lq_data->is_green; + u8 is_green = lq_sta->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) + if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) || + !sta->ht_info.ht_supported) return -1; - rc = 0; - tbl->is_dup = lq_data->is_dup; + tbl->is_dup = lq_sta->is_dup; tbl->lq_type = LQ_SISO; tbl->action = 0; - rs_get_supported_rates(lq_data, NULL, tbl->lq_type, + rs_get_supported_rates(lq_sta, NULL, tbl->lq_type, &rate_mask); - if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ) + if (priv->current_ht_config.supported_chan_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) + if (priv->current_ht_config.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) + } else if (priv->current_ht_config.sgf & HT_SHORT_GI_20MHZ_ONLY) tbl->is_SGI = 1; else tbl->is_SGI = 0; @@ -1005,8 +1152,8 @@ static int rs_switch_to_siso(struct iwl_priv *priv, 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); + rs_get_expected_tpt_table(lq_sta, tbl); + rate = rs_get_best_rate(priv, lq_sta, 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)) { @@ -1017,23 +1164,30 @@ static int rs_switch_to_siso(struct iwl_priv *priv, 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); + return 0; +#else + return -1; -#endif /*CONFIG_IWLWIFI_HT */ - return rc; +#endif /*CONFIG_IWL4965_HT */ } -static int rs_move_legacy_other(struct iwl_priv *priv, - struct iwl_rate_scale_priv *lq_data, +/* + * Try to switch to new modulation mode from legacy + */ +static int rs_move_legacy_other(struct iwl4965_priv *priv, + struct iwl4965_lq_sta *lq_sta, + struct ieee80211_conf *conf, + struct sta_info *sta, 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)); + int ret = 0; + struct iwl4965_scale_tbl_info *tbl = + &(lq_sta->lq_info[lq_sta->active_tbl]); + struct iwl4965_scale_tbl_info *search_tbl = + &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); + struct iwl4965_rate_scale_data *window = &(tbl->win[index]); + u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - + (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); u8 start_action = tbl->action; for (; ;) { @@ -1042,52 +1196,59 @@ static int rs_move_legacy_other(struct iwl_priv *priv, IWL_DEBUG_HT("LQ Legacy switch Antenna\n"); search_tbl->lq_type = LQ_NONE; - lq_data->action_counter++; + lq_sta->action_counter++; + + /* Don't change antenna if success has been great */ if (window->success_ratio >= IWL_RS_GOOD_RATIO) break; - if (!rs_is_other_ant_connected(lq_data->antenna, + + /* Don't change antenna if other one is not connected */ + if (!rs_is_other_ant_connected(lq_sta->antenna, tbl->antenna_type)) break; + /* Set up search table to try other antenna */ 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; + rs_get_expected_tpt_table(lq_sta, search_tbl); + lq_sta->search_better_tbl = 1; goto out; case IWL_LEGACY_SWITCH_SISO: IWL_DEBUG_HT("LQ: Legacy switch to SISO\n"); + + /* Set up search table to try SISO */ 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) + ret = rs_switch_to_siso(priv, lq_sta, conf, sta, + search_tbl, index); + if (!ret) { + lq_sta->search_better_tbl = 1; + lq_sta->action_counter = 0; goto out; + } break; case IWL_LEGACY_SWITCH_MIMO: IWL_DEBUG_HT("LQ: Legacy switch MIMO\n"); + + /* Set up search table to try MIMO */ 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) + ret = rs_switch_to_mimo(priv, lq_sta, conf, sta, + search_tbl, index); + if (!ret) { + lq_sta->search_better_tbl = 1; + lq_sta->action_counter = 0; goto out; + } break; } tbl->action++; @@ -1108,30 +1269,35 @@ static int rs_move_legacy_other(struct iwl_priv *priv, } -static int rs_move_siso_to_other(struct iwl_priv *priv, - struct iwl_rate_scale_priv *lq_data, +/* + * Try to switch to new modulation mode from SISO + */ +static int rs_move_siso_to_other(struct iwl4965_priv *priv, + struct iwl4965_lq_sta *lq_sta, + struct ieee80211_conf *conf, + struct sta_info *sta, 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)); + int ret; + u8 is_green = lq_sta->is_green; + struct iwl4965_scale_tbl_info *tbl = + &(lq_sta->lq_info[lq_sta->active_tbl]); + struct iwl4965_scale_tbl_info *search_tbl = + &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); + struct iwl4965_rate_scale_data *window = &(tbl->win[index]); + u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - + (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); u8 start_action = tbl->action; for (;;) { - lq_data->action_counter++; + lq_sta->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, + if (!rs_is_other_ant_connected(lq_sta->antenna, tbl->antenna_type)) break; @@ -1139,7 +1305,7 @@ static int rs_move_siso_to_other(struct iwl_priv *priv, search_tbl->action = IWL_SISO_SWITCH_MIMO; rs_toggle_antenna(&(search_tbl->current_rate), search_tbl); - lq_data->search_better_tbl = 1; + lq_sta->search_better_tbl = 1; goto out; @@ -1150,13 +1316,12 @@ static int rs_move_siso_to_other(struct iwl_priv *priv, 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) + ret = rs_switch_to_mimo(priv, lq_sta, conf, sta, + search_tbl, index); + if (!ret) { + lq_sta->search_better_tbl = 1; goto out; + } break; case IWL_SISO_SWITCH_GI: IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n"); @@ -1168,17 +1333,17 @@ static int rs_move_siso_to_other(struct iwl_priv *priv, search_tbl->is_SGI = 1; else break; - lq_data->search_better_tbl = 1; + lq_sta->search_better_tbl = 1; if ((tbl->lq_type == LQ_SISO) && (tbl->is_SGI)) { - s32 tpt = lq_data->last_tpt / 100; + s32 tpt = lq_sta->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; + lq_sta->search_better_tbl = 0; } - rs_get_expected_tpt_table(lq_data, search_tbl); + rs_get_expected_tpt_table(lq_sta, search_tbl); rs_mcs_from_tbl(&search_tbl->current_rate, search_tbl, index, is_green); goto out; @@ -1199,26 +1364,33 @@ static int rs_move_siso_to_other(struct iwl_priv *priv, return 0; } -static int rs_move_mimo_to_other(struct iwl_priv *priv, - struct iwl_rate_scale_priv *lq_data, +/* + * Try to switch to new modulation mode from MIMO + */ +static int rs_move_mimo_to_other(struct iwl4965_priv *priv, + struct iwl4965_lq_sta *lq_sta, + struct ieee80211_conf *conf, + struct sta_info *sta, 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)); + int ret; + s8 is_green = lq_sta->is_green; + struct iwl4965_scale_tbl_info *tbl = + &(lq_sta->lq_info[lq_sta->active_tbl]); + struct iwl4965_scale_tbl_info *search_tbl = + &(lq_sta->lq_info[(1 - lq_sta->active_tbl)]); + u32 sz = (sizeof(struct iwl4965_scale_tbl_info) - + (sizeof(struct iwl4965_rate_scale_data) * IWL_RATE_COUNT)); u8 start_action = tbl->action; for (;;) { - lq_data->action_counter++; + lq_sta->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"); + + /* Set up new search table for SISO */ memcpy(search_tbl, tbl, sz); search_tbl->lq_type = LQ_SISO; search_tbl->is_SGI = 0; @@ -1228,16 +1400,18 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv, 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; + ret = rs_switch_to_siso(priv, lq_sta, conf, sta, + search_tbl, index); + if (!ret) { + lq_sta->search_better_tbl = 1; goto out; } break; case IWL_MIMO_SWITCH_GI: IWL_DEBUG_HT("LQ: MIMO SWITCH TO GI\n"); + + /* Set up new search table for MIMO */ memcpy(search_tbl, tbl, sz); search_tbl->lq_type = LQ_MIMO; search_tbl->antenna_type = ANT_BOTH; @@ -1246,17 +1420,24 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv, search_tbl->is_SGI = 0; else search_tbl->is_SGI = 1; - lq_data->search_better_tbl = 1; + lq_sta->search_better_tbl = 1; + + /* + * 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->lq_type == LQ_MIMO) && (tbl->is_SGI)) { - s32 tpt = lq_data->last_tpt / 100; + s32 tpt = lq_sta->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; + lq_sta->search_better_tbl = 0; } - rs_get_expected_tpt_table(lq_data, search_tbl); + rs_get_expected_tpt_table(lq_sta, search_tbl); rs_mcs_from_tbl(&search_tbl->current_rate, search_tbl, index, is_green); goto out; @@ -1279,43 +1460,71 @@ static int rs_move_mimo_to_other(struct iwl_priv *priv, } -static void rs_stay_in_table(struct iwl_rate_scale_priv *lq_data) +/* + * 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 iwl4965_lq_sta *lq_sta) { - struct iwl_scale_tbl_info *tbl; + struct iwl4965_scale_tbl_info *tbl; int i; int active_tbl; int flush_interval_passed = 0; - active_tbl = lq_data->active_tbl; + active_tbl = lq_sta->active_tbl; - tbl = &(lq_data->lq_info[active_tbl]); + tbl = &(lq_sta->lq_info[active_tbl]); - if (lq_data->stay_in_tbl) { + /* If we've been disallowing search, see if we should now allow it */ + if (lq_sta->stay_in_tbl) { - if (lq_data->flush_timer) + /* Elapsed time using current modulation mode */ + if (lq_sta->flush_timer) flush_interval_passed = time_after(jiffies, - (unsigned long)(lq_data->flush_timer + + (unsigned long)(lq_sta->flush_timer + IWL_RATE_SCALE_FLUSH_INTVL)); + /* For now, disable the elapsed time criterion */ 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) + + /* + * 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 ((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_HT("LQ: stay is expired %d %d %d\n:", - lq_data->total_failed, - lq_data->total_success, + lq_sta->total_failed, + lq_sta->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; + + /* 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_HT("LQ: stay in table clear win\n"); for (i = 0; i < IWL_RATE_COUNT; i++) @@ -1324,23 +1533,32 @@ static void rs_stay_in_table(struct iwl_rate_scale_priv *lq_data) } } - if (!lq_data->stay_in_tbl) { + /* If transitioning to allow "search", reset all history + * bitmaps and stats in active table (this will become the new + * "search" table). */ + if (!lq_sta->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, +/* + * Do rate scaling and search for new modulation mode. + */ +static void rs_rate_scale_perform(struct iwl4965_priv *priv, struct net_device *dev, struct ieee80211_hdr *hdr, struct sta_info *sta) { + struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_hw *hw = local_to_hw(local); + struct ieee80211_conf *conf = &hw->conf; int low = IWL_RATE_INVALID; int high = IWL_RATE_INVALID; int index; int i; - struct iwl_rate_scale_data *window = NULL; + struct iwl4965_rate_scale_data *window = NULL; int current_tpt = IWL_INVALID_VALUE; int low_tpt = IWL_INVALID_VALUE; int high_tpt = IWL_INVALID_VALUE; @@ -1348,10 +1566,10 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, 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; + struct iwl4965_lq_sta *lq_sta; + struct iwl4965_scale_tbl_info *tbl, *tbl1; u16 rate_scale_index_msk = 0; - struct iwl_rate mcs_rate; + struct iwl4965_rate mcs_rate; u8 is_green = 0; u8 active_tbl = 0; u8 done_search = 0; @@ -1374,34 +1592,42 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, IWL_DEBUG_RATE("still rate scaling not ready\n"); return; } - lq_data = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; + lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; - if (!lq_data->search_better_tbl) - active_tbl = lq_data->active_tbl; + /* + * 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_data->active_tbl; + active_tbl = 1 - lq_sta->active_tbl; - tbl = &(lq_data->lq_info[active_tbl]); - is_green = lq_data->is_green; + tbl = &(lq_sta->lq_info[active_tbl]); + is_green = lq_sta->is_green; + /* current tx rate */ 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, + /* rates available for this association, and for modulation mode */ + rs_get_supported_rates(lq_sta, 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) + if (lq_sta->phymode == (u8) MODE_IEEE80211A) + /* supp_rates has no CCK bits in A mode */ rate_scale_index_msk = (u16) (rate_mask & - (lq_data->supp_rates << IWL_FIRST_OFDM_RATE)); + (lq_sta->supp_rates << IWL_FIRST_OFDM_RATE)); else rate_scale_index_msk = (u16) (rate_mask & - lq_data->supp_rates); + lq_sta->supp_rates); } else rate_scale_index_msk = rate_mask; @@ -1409,11 +1635,13 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, if (!rate_scale_index_msk) rate_scale_index_msk = rate_mask; + /* If current rate is no longer supported on current association, + * or user changed preferences for rates, find a new supported rate. */ if (index < 0 || !((1 << index) & rate_scale_index_msk)) { index = IWL_INVALID_VALUE; update_lq = 1; - /* get the lowest availabe rate */ + /* get the highest available rate */ for (i = 0; i <= IWL_RATE_COUNT; i++) { if ((1 << i) & rate_scale_index_msk) index = i; @@ -1425,11 +1653,19 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, } } + /* Get expected throughput table and history window for current rate */ if (!tbl->expected_tpt) - rs_get_expected_tpt_table(lq_data, tbl); + rs_get_expected_tpt_table(lq_sta, tbl); 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)) @@ -1437,82 +1673,118 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, IWL_DEBUG_RATE("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; - rs_stay_in_table(lq_data); + + /* Should we stay with this modulation mode, + * or search for a new one? */ + rs_stay_in_table(lq_sta); + + /* Set up new rate table in uCode, if needed */ 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_fill_link_cmd(lq_sta, &mcs_rate, &lq_sta->lq); + rs_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); } goto out; + /* Else we have enough samples; calculate estimate of + * actual average throughput */ } else window->average_tpt = ((window->success_ratio * tbl->expected_tpt[index] + 64) / 128); - if (lq_data->search_better_tbl) { + /* If we are searching for better modulation mode, check success. */ + if (lq_sta->search_better_tbl) { int success_limit = IWL_RATE_SCALE_SWITCH; + /* 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->success_ratio > success_limit) || - (window->average_tpt > lq_data->last_tpt)) { + (window->average_tpt > lq_sta->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_sta->last_tpt); + lq_sta->enable_counter = 1; } - lq_data->active_tbl = active_tbl; + /* 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 { + /* Nullify "search" table */ tbl->lq_type = LQ_NONE; - active_tbl = lq_data->active_tbl; - tbl = &(lq_data->lq_info[active_tbl]); - index = iwl_rate_index_from_plcp( + /* 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 = iwl4965_rate_index_from_plcp( tbl->current_rate.rate_n_flags); + current_tpt = lq_sta->last_tpt; + /* Need to set up a new rate table in uCode */ 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; + + /* 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(index, rate_scale_index_msk, tbl->lq_type); low = high_low & 0xff; high = (high_low >> 8) & 0xff; + /* 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; - + /* Assume rate increase */ scale_action = 1; + /* Too many failures, decrease rate */ 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; + + /* No throughput measured yet for adjacent rates; try increase. */ } else if ((low_tpt == IWL_INVALID_VALUE) && (high_tpt == IWL_INVALID_VALUE)) scale_action = 1; + + /* 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) scale_action = 1; else { @@ -1520,7 +1792,10 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, ("decrease rate because of high tpt\n"); scale_action = -1; } + + /* 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 ("decrease rate because of low tpt\n"); @@ -1530,23 +1805,30 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, } } + /* Sanity check; asked for decrease, but success rate or throughput + * has been good at old rate. Don't change it. */ 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; + + /* Sanity check; asked for increase, but success rate has not been great + * even at old rate, higher rate will be worse. Don't change it. */ } else if ((scale_action == 1) && (window->success_ratio < IWL_RATE_INCREASE_TH)) scale_action = 0; 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; @@ -1554,6 +1836,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, break; case 0: + /* No change */ default: break; } @@ -1563,65 +1846,97 @@ static void rs_rate_scale_perform(struct iwl_priv *priv, index, scale_action, low, high, tbl->lq_type); lq_update: + /* Replace uCode's rate table for the destination station. */ 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_fill_link_cmd(lq_sta, &mcs_rate, &lq_sta->lq); + rs_send_lq_cmd(priv, &lq_sta->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; + /* Should we stay with this modulation mode, or search for a new one? */ + rs_stay_in_table(lq_sta); + /* + * 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) { + /* 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_data, index); + rs_move_legacy_other(priv, lq_sta, conf, sta, index); else if (is_siso(tbl->lq_type)) - rs_move_siso_to_other(priv, lq_data, index); + rs_move_siso_to_other(priv, lq_sta, conf, sta, index); else - rs_move_mimo_to_other(priv, lq_data, index); + rs_move_mimo_to_other(priv, lq_sta, conf, sta, index); - if (lq_data->search_better_tbl) { - tbl = &(lq_data->lq_info[(1 - lq_data->active_tbl)]); + /* 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])); - index = iwl_rate_index_from_plcp( + /* Use new "search" start rate */ + index = iwl4965_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); + rs_fill_link_cmd(lq_sta, &tbl->current_rate, + &lq_sta->lq); + rs_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC); } - tbl1 = &(lq_data->lq_info[lq_data->active_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) && -#ifdef CONFIG_IWLWIFI_HT - !priv->current_assoc_ht.is_ht && +#ifdef CONFIG_IWL4965_HT + (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)) && #endif - (lq_data->action_counter >= 1)) { - lq_data->action_counter = 0; + (lq_sta->action_counter >= 1)) { + lq_sta->action_counter = 0; IWL_DEBUG_HT("LQ: STAY in legacy table\n"); - rs_set_stay_in_table(1, lq_data); + rs_set_stay_in_table(1, lq_sta); } - 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) && + /* 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 >= IWL_ACTION_LIMIT)) { +#ifdef CONFIG_IWL4965_HT_AGG + /* If appropriate, set up aggregation! */ + if ((lq_sta->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); +#endif /*CONFIG_IWL4965_HT_AGG */ + lq_sta->action_counter = 0; + rs_set_stay_in_table(0, lq_sta); } + + /* + * Else, don't search for a new modulation mode. + * Put new timestamp in stay-in-modulation-mode flush timer if: + * 1) Not changing rates right now + * 2) Not just finishing up a search + * 3) flush timer is empty + */ } else { - if ((!update_lq) && (!done_search) && (!lq_data->flush_timer)) - lq_data->flush_timer = jiffies; + if ((!update_lq) && (!done_search) && (!lq_sta->flush_timer)) + lq_sta->flush_timer = jiffies; } out: @@ -1632,7 +1947,7 @@ out: /* sta->txrate is an index to A mode rates which start * at IWL_FIRST_OFDM_RATE */ - if (lq_data->phymode == (u8) MODE_IEEE80211A) + if (lq_sta->phymode == (u8) MODE_IEEE80211A) sta->txrate = i - IWL_FIRST_OFDM_RATE; else sta->txrate = i; @@ -1641,38 +1956,39 @@ out: } -static void rs_initialize_lq(struct iwl_priv *priv, +static void rs_initialize_lq(struct iwl4965_priv *priv, + struct ieee80211_conf *conf, struct sta_info *sta) { int i; - struct iwl_rate_scale_priv *lq; - struct iwl_scale_tbl_info *tbl; + struct iwl4965_lq_sta *lq_sta; + struct iwl4965_scale_tbl_info *tbl; u8 active_tbl = 0; int rate_idx; - u8 use_green = rs_use_green(priv); - struct iwl_rate mcs_rate; + u8 use_green = rs_use_green(priv, conf); + struct iwl4965_rate mcs_rate; if (!sta || !sta->rate_ctrl_priv) goto out; - lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; + lq_sta = (struct iwl4965_lq_sta *)sta->rate_ctrl_priv; i = sta->last_txrate; - if ((lq->lq.sta_id == 0xff) && + if ((lq_sta->lq.sta_id == 0xff) && (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)) goto out; - if (!lq->search_better_tbl) - active_tbl = lq->active_tbl; + if (!lq_sta->search_better_tbl) + active_tbl = lq_sta->active_tbl; else - active_tbl = 1 - lq->active_tbl; + active_tbl = 1 - lq_sta->active_tbl; - tbl = &(lq->lq_info[active_tbl]); + tbl = &(lq_sta->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 = iwl4965_rates[i].plcp ; mcs_rate.rate_n_flags |= RATE_MCS_ANT_B_MSK; mcs_rate.rate_n_flags &= ~RATE_MCS_ANT_A_MSK; @@ -1686,114 +2002,95 @@ static void rs_initialize_lq(struct iwl_priv *priv, 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); + rs_get_expected_tpt_table(lq_sta, tbl); + rs_fill_link_cmd(lq_sta, &mcs_rate, &lq_sta->lq); + rs_send_lq_cmd(priv, &lq_sta->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) +static void rs_get_rate(void *priv_rate, struct net_device *dev, + struct ieee80211_hw_mode *mode, struct sk_buff *skb, + struct rate_selection *sel) { int i; struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); + struct ieee80211_conf *conf = &local->hw.conf; 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; + struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate; + struct iwl4965_lq_sta *lq_sta; 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) { + /* Send management frames and broadcast/multicast data using lowest + * rate. */ + fc = le16_to_cpu(hdr->frame_control); + if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || + !sta || !sta->rate_ctrl_priv) { + sel->rate = rate_lowest(local, local->oper_hw_mode, sta); if (sta) sta_info_put(sta); - return rs_get_lowest_rate(local); + return; } - lq = (struct iwl_rate_scale_priv *)sta->rate_ctrl_priv; + lq_sta = (struct iwl4965_lq_sta *)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); + if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) && + !lq_sta->ibss_sta_added) { + u8 sta_id = iwl4965_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); + sta_id = iwl4965_add_station_flags(priv, hdr->addr1, + 0, CMD_ASYNC, NULL); } 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); + lq_sta->lq.sta_id = sta_id; + lq_sta->lq.rs_table[0].rate_n_flags = 0; + lq_sta->ibss_sta_added = 1; + rs_initialize_lq(priv, conf, sta); } - if (!lq->ibss_sta_added) + if (!lq_sta->ibss_sta_added) goto done; } done: + if ((i < 0) || (i > IWL_RATE_COUNT)) { + sel->rate = rate_lowest(local, local->oper_hw_mode, sta); + return; + } sta_info_put(sta); - if ((i < 0) || (i > IWL_RATE_COUNT)) - return rs_get_lowest_rate(local); - return &priv->ieee_rates[i]; + sel->rate = &priv->ieee_rates[i]; } static void *rs_alloc_sta(void *priv, gfp_t gfp) { - struct iwl_rate_scale_priv *crl; + struct iwl4965_lq_sta *lq_sta; int i, j; IWL_DEBUG_RATE("create station rate scale window\n"); - crl = kzalloc(sizeof(struct iwl_rate_scale_priv), gfp); + lq_sta = kzalloc(sizeof(struct iwl4965_lq_sta), gfp); - if (crl == NULL) + if (lq_sta == NULL) return NULL; - crl->lq.sta_id = 0xff; + lq_sta->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])); + rs_rate_scale_clear_window(&(lq_sta->lq_info[j].win[i])); - return crl; + return lq_sta; } static void rs_rate_init(void *priv_rate, void *priv_sta, @@ -1801,16 +2098,17 @@ static void rs_rate_init(void *priv_rate, void *priv_sta, struct sta_info *sta) { int i, j; + struct ieee80211_conf *conf = &local->hw.conf; 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; + struct iwl4965_priv *priv = (struct iwl4965_priv *)priv_rate; + struct iwl4965_lq_sta *lq_sta = priv_sta; - crl->flush_timer = 0; - crl->supp_rates = sta->supp_rates; + lq_sta->flush_timer = 0; + lq_sta->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])); + rs_rate_scale_clear_window(&(lq_sta->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 @@ -1818,9 +2116,9 @@ static void rs_rate_init(void *priv_rate, void *priv_sta, * previous packets? Need to have IEEE 802.1X auth succeed immediately * after assoc.. */ - crl->ibss_sta_added = 0; + lq_sta->ibss_sta_added = 0; if (priv->iw_mode == IEEE80211_IF_TYPE_AP) { - u8 sta_id = iwl_hw_find_station(priv, sta->addr); + u8 sta_id = iwl4965_hw_find_station(priv, sta->addr); DECLARE_MAC_BUF(mac); /* for IBSS the call are from tasklet */ @@ -1830,77 +2128,89 @@ static void rs_rate_init(void *priv_rate, void *priv_sta, 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); + sta_id = iwl4965_add_station_flags(priv, sta->addr, + 0, CMD_ASYNC, NULL); } if ((sta_id != IWL_INVALID_STATION)) { - crl->lq.sta_id = sta_id; - crl->lq.rs_table[0].rate_n_flags = 0; + lq_sta->lq.sta_id = sta_id; + lq_sta->lq.rs_table[0].rate_n_flags = 0; } /* FIXME: this is w/a remove it later */ priv->assoc_station_added = 1; } + /* Find highest tx rate supported by hardware and destination station */ 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 - */ + /* For MODE_IEEE80211A, cck rates are at end of 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*/ + lq_sta->is_dup = 0; + lq_sta->valid_antenna = priv->valid_antenna; + lq_sta->antenna = priv->antenna; + lq_sta->is_green = rs_use_green(priv, conf); + lq_sta->active_rate = priv->active_rate; + lq_sta->active_rate &= ~(0x1000); + lq_sta->active_rate_basic = priv->active_rate_basic; + lq_sta->phymode = priv->phymode; +#ifdef CONFIG_IWL4965_HT + /* + * 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 = (priv->current_ht_config.supp_mcs_set[0] << 1); + lq_sta->active_siso_rate |= + (priv->current_ht_config.supp_mcs_set[0] & 0x1); + lq_sta->active_siso_rate &= ~((u16)0x2); + lq_sta->active_siso_rate = + lq_sta->active_siso_rate << IWL_FIRST_OFDM_RATE; + + /* Same here */ + lq_sta->active_mimo_rate = (priv->current_ht_config.supp_mcs_set[1] << 1); + lq_sta->active_mimo_rate |= + (priv->current_ht_config.supp_mcs_set[1] & 0x1); + lq_sta->active_mimo_rate &= ~((u16)0x2); + lq_sta->active_mimo_rate = + lq_sta->active_mimo_rate << IWL_FIRST_OFDM_RATE; + IWL_DEBUG_HT("SISO RATE 0x%X MIMO RATE 0x%X\n", + lq_sta->active_siso_rate, + lq_sta->active_mimo_rate); +#endif /*CONFIG_IWL4965_HT*/ #ifdef CONFIG_MAC80211_DEBUGFS - crl->drv = priv; + lq_sta->drv = priv; #endif if (priv->assoc_station_added) priv->lq_mngr.lq_ready = 1; - rs_initialize_lq(priv, sta); + rs_initialize_lq(priv, conf, 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) +static void rs_fill_link_cmd(struct iwl4965_lq_sta *lq_sta, + struct iwl4965_rate *tx_mcs, + struct iwl4965_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 }; + struct iwl4965_rate new_rate; + struct iwl4965_scale_tbl_info tbl_type = { 0 }; - rs_dbgfs_set_mcs(lq_data, tx_mcs, index); + /* Override starting rate (index 0) if needed for debug purposes */ + rs_dbgfs_set_mcs(lq_sta, tx_mcs, index); - rs_get_tbl_info_from_mcs(tx_mcs, lq_data->phymode, + /* Interpret rate_n_flags */ + rs_get_tbl_info_from_mcs(tx_mcs, lq_sta->phymode, &tbl_type, &rate_idx); + /* How many times should we repeat the initial rate? */ if (is_legacy(tbl_type.lq_type)) { ant_toggle_count = 1; repeat_rate = IWL_NUMBER_TRY; @@ -1909,19 +2219,27 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, 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(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; + lq_cmd->general_params.single_stream_ant_msk + = LINK_QUAL_ANT_A_MSK; else - lq_cmd->general_params.single_stream_ant_msk = 2; + lq_cmd->general_params.single_stream_ant_msk + = LINK_QUAL_ANT_B_MSK; index++; repeat_rate--; + /* 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_count < @@ -1933,22 +2251,30 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, } } - rs_dbgfs_set_mcs(lq_data, &new_rate, index); + /* 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.rate_n_flags); repeat_rate--; index++; } - rs_get_tbl_info_from_mcs(&new_rate, lq_data->phymode, &tbl_type, + rs_get_tbl_info_from_mcs(&new_rate, lq_sta->phymode, &tbl_type, &rate_idx); + /* 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; - rs_get_lower_rate(lq_data, &tbl_type, rate_idx, + /* Get next rate */ + rs_get_lower_rate(lq_sta, &tbl_type, rate_idx, use_ht_possible, &new_rate); + /* How many times should we repeat the next rate? */ if (is_legacy(tbl_type.lq_type)) { if (ant_toggle_count < NUM_TRY_BEFORE_ANTENNA_TOGGLE) ant_toggle_count++; @@ -1960,9 +2286,14 @@ static void rs_fill_link_cmd(struct iwl_rate_scale_priv *lq_data, } 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; - rs_dbgfs_set_mcs(lq_data, &new_rate, index); + /* 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.rate_n_flags); @@ -1987,27 +2318,27 @@ static void rs_free(void *priv_rate) static void rs_clear(void *priv_rate) { - struct iwl_priv *priv = (struct iwl_priv *) priv_rate; + struct iwl4965_priv *priv = (struct iwl4965_priv *) priv_rate; IWL_DEBUG_RATE("enter\n"); priv->lq_mngr.lq_ready = 0; -#ifdef CONFIG_IWLWIFI_HT -#ifdef CONFIG_IWLWIFI_HT_AGG +#ifdef CONFIG_IWL4965_HT +#ifdef CONFIG_IWL4965_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 */ +#endif /*CONFIG_IWL4965_HT_AGG */ +#endif /* CONFIG_IWL4965_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; + struct iwl4965_lq_sta *lq_sta = priv_sta; IWL_DEBUG_RATE("enter\n"); - kfree(rs_priv); + kfree(lq_sta); IWL_DEBUG_RATE("leave\n"); } @@ -2018,19 +2349,19 @@ 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) +static void rs_dbgfs_set_mcs(struct iwl4965_lq_sta *lq_sta, + struct iwl4965_rate *mcs, int index) { u32 base_rate; - if (rs_priv->phymode == (u8) MODE_IEEE80211A) + if (lq_sta->phymode == (u8) MODE_IEEE80211A) base_rate = 0x800D; else base_rate = 0x820A; - if (rs_priv->dbg_fixed.rate_n_flags) { + if (lq_sta->dbg_fixed.rate_n_flags) { if (index < 12) - mcs->rate_n_flags = rs_priv->dbg_fixed.rate_n_flags; + mcs->rate_n_flags = lq_sta->dbg_fixed.rate_n_flags; else mcs->rate_n_flags = base_rate; IWL_DEBUG_RATE("Fixed rate ON\n"); @@ -2043,7 +2374,7 @@ static void rs_dbgfs_set_mcs(struct iwl_rate_scale_priv *rs_priv, 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; + struct iwl4965_lq_sta *lq_sta = file->private_data; char buf[64]; int buf_size; u32 parsed_rate; @@ -2054,20 +2385,20 @@ static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, return -EFAULT; if (sscanf(buf, "%x", &parsed_rate) == 1) - rs_priv->dbg_fixed.rate_n_flags = parsed_rate; + lq_sta->dbg_fixed.rate_n_flags = parsed_rate; else - rs_priv->dbg_fixed.rate_n_flags = 0; + lq_sta->dbg_fixed.rate_n_flags = 0; - rs_priv->active_rate = 0x0FFF; - rs_priv->active_siso_rate = 0x1FD0; - rs_priv->active_mimo_rate = 0x1FD0; + lq_sta->active_rate = 0x0FFF; /* 1 - 54 MBits, includes CCK */ + lq_sta->active_siso_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ + lq_sta->active_mimo_rate = 0x1FD0; /* 6 - 60 MBits, no 9, no CCK */ IWL_DEBUG_RATE("sta_id %d rate 0x%X\n", - rs_priv->lq.sta_id, rs_priv->dbg_fixed.rate_n_flags); + lq_sta->lq.sta_id, lq_sta->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); + if (lq_sta->dbg_fixed.rate_n_flags) { + rs_fill_link_cmd(lq_sta, &lq_sta->dbg_fixed, &lq_sta->lq); + rs_send_lq_cmd(lq_sta->drv, &lq_sta->lq, CMD_ASYNC); } return count; @@ -2080,38 +2411,38 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, int desc = 0; int i = 0; - struct iwl_rate_scale_priv *rs_priv = file->private_data; + struct iwl4965_lq_sta *lq_sta = file->private_data; - desc += sprintf(buff+desc, "sta_id %d\n", rs_priv->lq.sta_id); + 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", - rs_priv->total_failed, rs_priv->total_success, - rs_priv->active_rate); + lq_sta->total_failed, lq_sta->total_success, + lq_sta->active_rate); desc += sprintf(buff+desc, "fixed rate 0x%X\n", - rs_priv->dbg_fixed.rate_n_flags); + lq_sta->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); + 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(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); + 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", - 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]); + 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++) desc += sprintf(buff+desc, " rate[%d] 0x%X\n", - i, le32_to_cpu(rs_priv->lq.rs_table[i].rate_n_flags)); + i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); return simple_read_from_buffer(user_buf, count, ppos, buff, desc); } @@ -2128,22 +2459,22 @@ static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, int desc = 0; int i, j; - struct iwl_rate_scale_priv *rs_priv = file->private_data; + struct iwl4965_lq_sta *lq_sta = 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); + 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_fat, + lq_sta->lq_info[i].is_dup, + lq_sta->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); + "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); } } return simple_read_from_buffer(user_buf, count, ppos, buff, desc); @@ -2157,20 +2488,20 @@ static const struct file_operations rs_sta_dbgfs_stats_table_ops = { 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 = + struct iwl4965_lq_sta *lq_sta = priv_sta; + lq_sta->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 = + lq_sta, &rs_sta_dbgfs_scale_table_ops); + lq_sta->rs_sta_dbgfs_stats_table_file = debugfs_create_file("rate_stats_table", 0600, dir, - rs_priv, &rs_sta_dbgfs_stats_table_ops); + lq_sta, &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); + struct iwl4965_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); } #endif @@ -2191,13 +2522,13 @@ static struct rate_control_ops rs_ops = { #endif }; -int iwl_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) +int iwl4965_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 iwl4965_priv *priv = hw->priv; + struct iwl4965_lq_sta *lq_sta; struct sta_info *sta; - int count = 0, i; + int cnt = 0, i; u32 samples = 0, success = 0, good = 0; unsigned long now = jiffies; u32 max_time = 0; @@ -2213,10 +2544,10 @@ int iwl_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) return sprintf(buf, "station %d not found\n", sta_id); } - rs_priv = (void *)sta->rate_ctrl_priv; + lq_sta = (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; + lq_type = lq_sta->lq_info[lq_sta->active_tbl].lq_type; + antenna = lq_sta->lq_info[lq_sta->active_tbl].antenna_type; if (is_legacy(lq_type)) i = IWL_RATE_54M_INDEX; @@ -2225,35 +2556,35 @@ int iwl_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) while (1) { u64 mask; int j; - int active = rs_priv->active_tbl; + int active = lq_sta->active_tbl; - count += - sprintf(&buf[count], " %2dMbs: ", iwl_rates[i].ieee / 2); + cnt += + sprintf(&buf[cnt], " %2dMbs: ", iwl4965_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) + buf[cnt++] = + (lq_sta->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; + samples += lq_sta->lq_info[active].win[i].counter; + good += lq_sta->lq_info[active].win[i].success_counter; + success += lq_sta->lq_info[active].win[i].success_counter * + iwl4965_rates[i].ieee; - if (rs_priv->lq_info[active].win[i].stamp) { + if (lq_sta->lq_info[active].win[i].stamp) { int delta = jiffies_to_msecs(now - - rs_priv->lq_info[active].win[i].stamp); + lq_sta->lq_info[active].win[i].stamp); if (delta > max_time) max_time = delta; - count += sprintf(&buf[count], "%5dms\n", delta); + cnt += sprintf(&buf[cnt], "%5dms\n", delta); } else - buf[count++] = '\n'; + buf[cnt++] = '\n'; - j = iwl_get_prev_ieee_rate(i); + j = iwl4965_get_prev_ieee_rate(i); if (j == i) break; i = j; @@ -2261,37 +2592,38 @@ int iwl_fill_rs_info(struct ieee80211_hw *hw, char *buf, u8 sta_id) /* 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 */ + * NOTE: We multiply # of samples by 2 since the IEEE measurement + * added from iwl4965_rates is actually 2X the rate */ if (samples) - count += sprintf(&buf[count], + cnt += sprintf(&buf[cnt], "\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 " + cnt += sprintf(&buf[cnt], "\nAverage rate: 0Mbs\n"); + + cnt += sprintf(&buf[cnt], "\nrate scale type %d antenna %d " "active_search %d rate index %d\n", lq_type, antenna, - rs_priv->search_better_tbl, sta->last_txrate); + lq_sta->search_better_tbl, sta->last_txrate); sta_info_put(sta); - return count; + return cnt; } -void iwl_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) +void iwl4965_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id) { - struct iwl_priv *priv = hw->priv; + struct iwl4965_priv *priv = hw->priv; priv->lq_mngr.lq_ready = 1; } -void iwl_rate_control_register(struct ieee80211_hw *hw) +void iwl4965_rate_control_register(struct ieee80211_hw *hw) { ieee80211_rate_control_register(&rs_ops); } -void iwl_rate_control_unregister(struct ieee80211_hw *hw) +void iwl4965_rate_control_unregister(struct ieee80211_hw *hw) { ieee80211_rate_control_unregister(&rs_ops); } |