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authorDavid S. Miller <davem@davemloft.net>2010-04-11 17:53:53 -0400
committerDavid S. Miller <davem@davemloft.net>2010-04-11 17:53:53 -0400
commit871039f02f8ec4ab2e5e9010718caa8e085786f1 (patch)
treef0d2b3127fc48c862967d68c46c2d46668137515 /drivers/net/wireless/iwlwifi/iwl-agn-rs.c
parente4077e018b5ead3de9951fc01d8bf12eeeeeefed (diff)
parent4a1032faac94ebbf647460ae3e06fc21146eb280 (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts: drivers/net/stmmac/stmmac_main.c drivers/net/wireless/wl12xx/wl1271_cmd.c drivers/net/wireless/wl12xx/wl1271_main.c drivers/net/wireless/wl12xx/wl1271_spi.c net/core/ethtool.c net/mac80211/scan.c
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn-rs.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-agn-rs.c56
1 files changed, 25 insertions, 31 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index 5155b1a027eb..0de80914be77 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -26,6 +26,7 @@
26#include <linux/kernel.h> 26#include <linux/kernel.h>
27#include <linux/init.h> 27#include <linux/init.h>
28#include <linux/skbuff.h> 28#include <linux/skbuff.h>
29#include <linux/slab.h>
29#include <linux/wireless.h> 30#include <linux/wireless.h>
30#include <net/mac80211.h> 31#include <net/mac80211.h>
31 32
@@ -345,6 +346,17 @@ static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
345 !!(rate_n_flags & RATE_MCS_ANT_C_MSK); 346 !!(rate_n_flags & RATE_MCS_ANT_C_MSK);
346} 347}
347 348
349/*
350 * Static function to get the expected throughput from an iwl_scale_tbl_info
351 * that wraps a NULL pointer check
352 */
353static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
354{
355 if (tbl->expected_tpt)
356 return tbl->expected_tpt[rs_index];
357 return 0;
358}
359
348/** 360/**
349 * rs_collect_tx_data - Update the success/failure sliding window 361 * rs_collect_tx_data - Update the success/failure sliding window
350 * 362 *
@@ -352,19 +364,21 @@ static inline int get_num_of_ant_from_rate(u32 rate_n_flags)
352 * at this rate. window->data contains the bitmask of successful 364 * at this rate. window->data contains the bitmask of successful
353 * packets. 365 * packets.
354 */ 366 */
355static int rs_collect_tx_data(struct iwl_rate_scale_data *windows, 367static int rs_collect_tx_data(struct iwl_scale_tbl_info *tbl,
356 int scale_index, s32 tpt, int attempts, 368 int scale_index, int attempts, int successes)
357 int successes)
358{ 369{
359 struct iwl_rate_scale_data *window = NULL; 370 struct iwl_rate_scale_data *window = NULL;
360 static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1)); 371 static const u64 mask = (((u64)1) << (IWL_RATE_MAX_WINDOW - 1));
361 s32 fail_count; 372 s32 fail_count, tpt;
362 373
363 if (scale_index < 0 || scale_index >= IWL_RATE_COUNT) 374 if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
364 return -EINVAL; 375 return -EINVAL;
365 376
366 /* Select window for current tx bit rate */ 377 /* Select window for current tx bit rate */
367 window = &(windows[scale_index]); 378 window = &(tbl->win[scale_index]);
379
380 /* Get expected throughput */
381 tpt = get_expected_tpt(tbl, scale_index);
368 382
369 /* 383 /*
370 * Keep track of only the latest 62 tx frame attempts in this rate's 384 * Keep track of only the latest 62 tx frame attempts in this rate's
@@ -734,16 +748,6 @@ static bool table_type_matches(struct iwl_scale_tbl_info *a,
734 return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) && 748 return (a->lq_type == b->lq_type) && (a->ant_type == b->ant_type) &&
735 (a->is_SGI == b->is_SGI); 749 (a->is_SGI == b->is_SGI);
736} 750}
737/*
738 * Static function to get the expected throughput from an iwl_scale_tbl_info
739 * that wraps a NULL pointer check
740 */
741static s32 get_expected_tpt(struct iwl_scale_tbl_info *tbl, int rs_index)
742{
743 if (tbl->expected_tpt)
744 return tbl->expected_tpt[rs_index];
745 return 0;
746}
747 751
748/* 752/*
749 * mac80211 sends us Tx status 753 * mac80211 sends us Tx status
@@ -760,12 +764,10 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
760 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 764 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
761 struct iwl_priv *priv = (struct iwl_priv *)priv_r; 765 struct iwl_priv *priv = (struct iwl_priv *)priv_r;
762 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 766 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
763 struct iwl_rate_scale_data *window = NULL;
764 enum mac80211_rate_control_flags mac_flags; 767 enum mac80211_rate_control_flags mac_flags;
765 u32 tx_rate; 768 u32 tx_rate;
766 struct iwl_scale_tbl_info tbl_type; 769 struct iwl_scale_tbl_info tbl_type;
767 struct iwl_scale_tbl_info *curr_tbl, *other_tbl; 770 struct iwl_scale_tbl_info *curr_tbl, *other_tbl, *tmp_tbl;
768 s32 tpt = 0;
769 771
770 IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n"); 772 IWL_DEBUG_RATE_LIMIT(priv, "get frame ack response, update rate scale window\n");
771 773
@@ -853,7 +855,6 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
853 IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n"); 855 IWL_DEBUG_RATE(priv, "Neither active nor search matches tx rate\n");
854 return; 856 return;
855 } 857 }
856 window = (struct iwl_rate_scale_data *)&(curr_tbl->win[0]);
857 858
858 /* 859 /*
859 * Updating the frame history depends on whether packets were 860 * Updating the frame history depends on whether packets were
@@ -866,8 +867,7 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
866 tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags); 867 tx_rate = le32_to_cpu(table->rs_table[0].rate_n_flags);
867 rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type, 868 rs_get_tbl_info_from_mcs(tx_rate, priv->band, &tbl_type,
868 &rs_index); 869 &rs_index);
869 tpt = get_expected_tpt(curr_tbl, rs_index); 870 rs_collect_tx_data(curr_tbl, rs_index,
870 rs_collect_tx_data(window, rs_index, tpt,
871 info->status.ampdu_ack_len, 871 info->status.ampdu_ack_len,
872 info->status.ampdu_ack_map); 872 info->status.ampdu_ack_map);
873 873
@@ -897,19 +897,13 @@ static void rs_tx_status(void *priv_r, struct ieee80211_supported_band *sband,
897 * table as active/search. 897 * table as active/search.
898 */ 898 */
899 if (table_type_matches(&tbl_type, curr_tbl)) 899 if (table_type_matches(&tbl_type, curr_tbl))
900 tpt = get_expected_tpt(curr_tbl, rs_index); 900 tmp_tbl = curr_tbl;
901 else if (table_type_matches(&tbl_type, other_tbl)) 901 else if (table_type_matches(&tbl_type, other_tbl))
902 tpt = get_expected_tpt(other_tbl, rs_index); 902 tmp_tbl = other_tbl;
903 else 903 else
904 continue; 904 continue;
905 905 rs_collect_tx_data(tmp_tbl, rs_index, 1,
906 /* Constants mean 1 transmission, 0 successes */ 906 i < retries ? 0 : legacy_success);
907 if (i < retries)
908 rs_collect_tx_data(window, rs_index, tpt, 1,
909 0);
910 else
911 rs_collect_tx_data(window, rs_index, tpt, 1,
912 legacy_success);
913 } 907 }
914 908
915 /* Update success/fail counts if not searching for new mode */ 909 /* Update success/fail counts if not searching for new mode */