package/kernel/mac80211/patches/652-0001-rtl8xxxu-Obtain-RTS-rates-from-mac80211.patch

   1 From 3d1d6d96f14881c421860973b4eb4b2fff7cb812 Mon Sep 17 00:00:00 2001
   2 From: Jes Sorensen <Jes.Sorensen@redhat.com>
   3 Date: Wed, 5 Oct 2016 16:04:54 -0400
   4 Subject: [PATCH] rtl8xxxu: Obtain RTS rates from mac80211
   5
   6 Use the mac80211 provided rate for RTS rather than the hard coded
   7 24Mbps as suggested by the vendor drivers.
   8
   9 Reported-by: Andrea Merello <andrea.merello@gmail.com>
  10 Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
  11 ---
  12  drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h   |  6 +--
  13  .../net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c  | 46 ++++++++++++++--------
  14  2 files changed, 32 insertions(+), 20 deletions(-)
  15
  16 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h
  17 +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h
  18 @@ -1340,7 +1340,7 @@ struct rtl8xxxu_fileops {
  19         void (*fill_txdesc) (struct ieee80211_hdr *hdr,
  20                              struct rtl8xxxu_txdesc32 *tx_desc, u32 rate,
  21                              u16 rate_flag, bool sgi, bool short_preamble,
  22 -                            bool ampdu_enable);
  23 +                            bool ampdu_enable, u32 rts_rate);
  24         int writeN_block_size;
  25         int rx_agg_buf_size;
  26         char tx_desc_size;
  27 @@ -1437,11 +1437,11 @@ bool rtl8xxxu_gen2_simularity_compare(st
  28  void rtl8xxxu_fill_txdesc_v1(struct ieee80211_hdr *hdr,
  29                              struct rtl8xxxu_txdesc32 *tx_desc, u32 rate,
  30                              u16 rate_flag, bool sgi, bool short_preamble,
  31 -                            bool ampdu_enable);
  32 +                            bool ampdu_enable, u32 rts_rate);
  33  void rtl8xxxu_fill_txdesc_v2(struct ieee80211_hdr *hdr,
  34                              struct rtl8xxxu_txdesc32 *tx_desc32, u32 rate,
  35                              u16 rate_flag, bool sgi, bool short_preamble,
  36 -                            bool ampdu_enable);
  37 +                            bool ampdu_enable, u32 rts_rate);
  38
  39  extern struct rtl8xxxu_fileops rtl8192cu_fops;
  40  extern struct rtl8xxxu_fileops rtl8192eu_fops;
  41 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
  42 +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
  43 @@ -4762,7 +4762,7 @@ void
  44  rtl8xxxu_fill_txdesc_v1(struct ieee80211_hdr *hdr,
  45                         struct rtl8xxxu_txdesc32 *tx_desc, u32 rate,
  46                         u16 rate_flag, bool sgi, bool short_preamble,
  47 -                       bool ampdu_enable)
  48 +                       bool ampdu_enable, u32 rts_rate)
  49  {
  50         u16 seq_number;
  51
  52 @@ -4796,15 +4796,16 @@ rtl8xxxu_fill_txdesc_v1(struct ieee80211
  53         if (sgi)
  54                 tx_desc->txdw5 |= cpu_to_le32(TXDESC32_SHORT_GI);
  55
  56 +       /*
  57 +        * rts_rate is zero if RTS/CTS or CTS to SELF are not enabled
  58 +        */
  59 +       tx_desc->txdw4 |= cpu_to_le32(rts_rate << TXDESC32_RTS_RATE_SHIFT);
  60         if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS) {
  61 -               /*
  62 -                * Use RTS rate 24M - does the mac80211 tell
  63 -                * us which to use?
  64 -                */
  65 -               tx_desc->txdw4 |= cpu_to_le32(DESC_RATE_24M <<
  66 -                                             TXDESC32_RTS_RATE_SHIFT);
  67                 tx_desc->txdw4 |= cpu_to_le32(TXDESC32_RTS_CTS_ENABLE);
  68                 tx_desc->txdw4 |= cpu_to_le32(TXDESC32_HW_RTS_ENABLE);
  69 +       } else if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT) {
  70 +               tx_desc->txdw4 |= cpu_to_le32(TXDESC32_CTS_SELF_ENABLE);
  71 +               tx_desc->txdw4 |= cpu_to_le32(TXDESC32_HW_RTS_ENABLE);
  72         }
  73  }
  74
  75 @@ -4816,7 +4817,7 @@ void
  76  rtl8xxxu_fill_txdesc_v2(struct ieee80211_hdr *hdr,
  77                         struct rtl8xxxu_txdesc32 *tx_desc32, u32 rate,
  78                         u16 rate_flag, bool sgi, bool short_preamble,
  79 -                       bool ampdu_enable)
  80 +                       bool ampdu_enable, u32 rts_rate)
  81  {
  82         struct rtl8xxxu_txdesc40 *tx_desc40;
  83         u16 seq_number;
  84 @@ -4849,15 +4850,19 @@ rtl8xxxu_fill_txdesc_v2(struct ieee80211
  85         if (short_preamble)
  86                 tx_desc40->txdw5 |= cpu_to_le32(TXDESC40_SHORT_PREAMBLE);
  87
  88 +       tx_desc40->txdw4 |= cpu_to_le32(rts_rate << TXDESC40_RTS_RATE_SHIFT);
  89 +       /*
  90 +        * rts_rate is zero if RTS/CTS or CTS to SELF are not enabled
  91 +        */
  92         if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS) {
  93 -               /*
  94 -                * Use RTS rate 24M - does the mac80211 tell
  95 -                * us which to use?
  96 -                */
  97 -               tx_desc40->txdw4 |= cpu_to_le32(DESC_RATE_24M <<
  98 -                                               TXDESC40_RTS_RATE_SHIFT);
  99                 tx_desc40->txdw3 |= cpu_to_le32(TXDESC40_RTS_CTS_ENABLE);
 100                 tx_desc40->txdw3 |= cpu_to_le32(TXDESC40_HW_RTS_ENABLE);
 101 +       } else if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 102 +               /*
 103 +                * For some reason the vendor driver doesn't set
 104 +                * TXDESC40_HW_RTS_ENABLE for CTS to SELF
 105 +                */
 106 +               tx_desc40->txdw3 |= cpu_to_le32(TXDESC40_CTS_SELF_ENABLE);
 107         }
 108  }
 109
 110 @@ -4874,7 +4879,7 @@ static void rtl8xxxu_tx(struct ieee80211
 111         struct ieee80211_sta *sta = NULL;
 112         struct ieee80211_vif *vif = tx_info->control.vif;
 113         struct device *dev = &priv->udev->dev;
 114 -       u32 queue, rate;
 115 +       u32 queue, rate, rts_rate;
 116         u16 pktlen = skb->len;
 117         u16 seq_number;
 118         u16 rate_flag = tx_info->control.rates[0].flags;
 119 @@ -4974,10 +4979,17 @@ static void rtl8xxxu_tx(struct ieee80211
 120             (sta && vif && vif->bss_conf.use_short_preamble))
 121                 short_preamble = true;
 122
 123 +       if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS)
 124 +               rts_rate = ieee80211_get_rts_cts_rate(hw, tx_info)->hw_value;
 125 +       else if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT)
 126 +               rts_rate = ieee80211_get_rts_cts_rate(hw, tx_info)->hw_value;
 127 +       else
 128 +               rts_rate = 0;
 129 +
 130         seq_number = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
 131
 132 -       priv->fops->fill_txdesc(hdr, tx_desc, rate, rate_flag,
 133 -                               sgi, short_preamble, ampdu_enable);
 134 +       priv->fops->fill_txdesc(hdr, tx_desc, rate, rate_flag, sgi,
 135 +                               short_preamble, ampdu_enable, rts_rate);
 136
 137         rtl8xxxu_calc_tx_desc_csum(tx_desc);
 138