diff options
author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2010-02-24 14:31:04 -0500 |
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committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2010-02-24 14:33:45 -0500 |
commit | 109d28152b6e9d5de64cd23e3bc08885ccb3d1ef (patch) | |
tree | b7b8863faa05254781acfb85cc41da3eef467c6b /drivers/net/wireless/iwlwifi/iwl-rx.c | |
parent | 168cf9af699e87d5a6f44b684583714ecabb8e71 (diff) | |
parent | 60b341b778cc2929df16c0a504c91621b3c6a4ad (diff) |
Merge tag 'v2.6.33' for its firewire changes since last branch point
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-rx.c')
-rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-rx.c | 61 |
1 files changed, 8 insertions, 53 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c index 6090bc15a6d5..2dbce85404aa 100644 --- a/drivers/net/wireless/iwlwifi/iwl-rx.c +++ b/drivers/net/wireless/iwlwifi/iwl-rx.c | |||
@@ -345,10 +345,8 @@ void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq) | |||
345 | pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma, | 345 | pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma, |
346 | PAGE_SIZE << priv->hw_params.rx_page_order, | 346 | PAGE_SIZE << priv->hw_params.rx_page_order, |
347 | PCI_DMA_FROMDEVICE); | 347 | PCI_DMA_FROMDEVICE); |
348 | __free_pages(rxq->pool[i].page, | 348 | __iwl_free_pages(priv, rxq->pool[i].page); |
349 | priv->hw_params.rx_page_order); | ||
350 | rxq->pool[i].page = NULL; | 349 | rxq->pool[i].page = NULL; |
351 | priv->alloc_rxb_page--; | ||
352 | } | 350 | } |
353 | } | 351 | } |
354 | 352 | ||
@@ -416,9 +414,7 @@ void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq) | |||
416 | pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma, | 414 | pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma, |
417 | PAGE_SIZE << priv->hw_params.rx_page_order, | 415 | PAGE_SIZE << priv->hw_params.rx_page_order, |
418 | PCI_DMA_FROMDEVICE); | 416 | PCI_DMA_FROMDEVICE); |
419 | priv->alloc_rxb_page--; | 417 | __iwl_free_pages(priv, rxq->pool[i].page); |
420 | __free_pages(rxq->pool[i].page, | ||
421 | priv->hw_params.rx_page_order); | ||
422 | rxq->pool[i].page = NULL; | 418 | rxq->pool[i].page = NULL; |
423 | } | 419 | } |
424 | list_add_tail(&rxq->pool[i].list, &rxq->rx_used); | 420 | list_add_tail(&rxq->pool[i].list, &rxq->rx_used); |
@@ -654,47 +650,6 @@ void iwl_reply_statistics(struct iwl_priv *priv, | |||
654 | } | 650 | } |
655 | EXPORT_SYMBOL(iwl_reply_statistics); | 651 | EXPORT_SYMBOL(iwl_reply_statistics); |
656 | 652 | ||
657 | #define PERFECT_RSSI (-20) /* dBm */ | ||
658 | #define WORST_RSSI (-95) /* dBm */ | ||
659 | #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI) | ||
660 | |||
661 | /* Calculate an indication of rx signal quality (a percentage, not dBm!). | ||
662 | * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info | ||
663 | * about formulas used below. */ | ||
664 | static int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm) | ||
665 | { | ||
666 | int sig_qual; | ||
667 | int degradation = PERFECT_RSSI - rssi_dbm; | ||
668 | |||
669 | /* If we get a noise measurement, use signal-to-noise ratio (SNR) | ||
670 | * as indicator; formula is (signal dbm - noise dbm). | ||
671 | * SNR at or above 40 is a great signal (100%). | ||
672 | * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator. | ||
673 | * Weakest usable signal is usually 10 - 15 dB SNR. */ | ||
674 | if (noise_dbm) { | ||
675 | if (rssi_dbm - noise_dbm >= 40) | ||
676 | return 100; | ||
677 | else if (rssi_dbm < noise_dbm) | ||
678 | return 0; | ||
679 | sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2; | ||
680 | |||
681 | /* Else use just the signal level. | ||
682 | * This formula is a least squares fit of data points collected and | ||
683 | * compared with a reference system that had a percentage (%) display | ||
684 | * for signal quality. */ | ||
685 | } else | ||
686 | sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation * | ||
687 | (15 * RSSI_RANGE + 62 * degradation)) / | ||
688 | (RSSI_RANGE * RSSI_RANGE); | ||
689 | |||
690 | if (sig_qual > 100) | ||
691 | sig_qual = 100; | ||
692 | else if (sig_qual < 1) | ||
693 | sig_qual = 0; | ||
694 | |||
695 | return sig_qual; | ||
696 | } | ||
697 | |||
698 | /* Calc max signal level (dBm) among 3 possible receivers */ | 653 | /* Calc max signal level (dBm) among 3 possible receivers */ |
699 | static inline int iwl_calc_rssi(struct iwl_priv *priv, | 654 | static inline int iwl_calc_rssi(struct iwl_priv *priv, |
700 | struct iwl_rx_phy_res *rx_resp) | 655 | struct iwl_rx_phy_res *rx_resp) |
@@ -973,7 +928,10 @@ static void iwl_pass_packet_to_mac80211(struct iwl_priv *priv, | |||
973 | if (ieee80211_is_mgmt(fc) || | 928 | if (ieee80211_is_mgmt(fc) || |
974 | ieee80211_has_protected(fc) || | 929 | ieee80211_has_protected(fc) || |
975 | ieee80211_has_morefrags(fc) || | 930 | ieee80211_has_morefrags(fc) || |
976 | le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG) | 931 | le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG || |
932 | (ieee80211_is_data_qos(fc) && | ||
933 | *ieee80211_get_qos_ctl(hdr) & | ||
934 | IEEE80211_QOS_CONTROL_A_MSDU_PRESENT)) | ||
977 | ret = skb_linearize(skb); | 935 | ret = skb_linearize(skb); |
978 | else | 936 | else |
979 | ret = __pskb_pull_tail(skb, min_t(u16, IWL_LINK_HDR_MAX, len)) ? | 937 | ret = __pskb_pull_tail(skb, min_t(u16, IWL_LINK_HDR_MAX, len)) ? |
@@ -1105,11 +1063,8 @@ void iwl_rx_reply_rx(struct iwl_priv *priv, | |||
1105 | if (iwl_is_associated(priv) && | 1063 | if (iwl_is_associated(priv) && |
1106 | !test_bit(STATUS_SCANNING, &priv->status)) { | 1064 | !test_bit(STATUS_SCANNING, &priv->status)) { |
1107 | rx_status.noise = priv->last_rx_noise; | 1065 | rx_status.noise = priv->last_rx_noise; |
1108 | rx_status.qual = iwl_calc_sig_qual(rx_status.signal, | ||
1109 | rx_status.noise); | ||
1110 | } else { | 1066 | } else { |
1111 | rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE; | 1067 | rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE; |
1112 | rx_status.qual = iwl_calc_sig_qual(rx_status.signal, 0); | ||
1113 | } | 1068 | } |
1114 | 1069 | ||
1115 | /* Reset beacon noise level if not associated. */ | 1070 | /* Reset beacon noise level if not associated. */ |
@@ -1122,8 +1077,8 @@ void iwl_rx_reply_rx(struct iwl_priv *priv, | |||
1122 | iwl_dbg_report_frame(priv, phy_res, len, header, 1); | 1077 | iwl_dbg_report_frame(priv, phy_res, len, header, 1); |
1123 | #endif | 1078 | #endif |
1124 | iwl_dbg_log_rx_data_frame(priv, len, header); | 1079 | iwl_dbg_log_rx_data_frame(priv, len, header); |
1125 | IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, noise %d, qual %d, TSF %llu\n", | 1080 | IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, noise %d, TSF %llu\n", |
1126 | rx_status.signal, rx_status.noise, rx_status.qual, | 1081 | rx_status.signal, rx_status.noise, |
1127 | (unsigned long long)rx_status.mactime); | 1082 | (unsigned long long)rx_status.mactime); |
1128 | 1083 | ||
1129 | /* | 1084 | /* |