package/kernel/mac80211/patches/020-15-rt2800-status-based-rate-flags-for-nomatch-case.patch

   1 From 9d7a7a4d2b02bcd30fb5fe4270278212353cc332 Mon Sep 17 00:00:00 2001
   2 From: Stanislaw Gruszka <sgruszka@redhat.com>
   3 Date: Wed, 15 Feb 2017 10:25:11 +0100
   4 Subject: [PATCH 15/19] rt2800: status based rate flags for nomatch case
   5
   6 We use skb_desc->tx_rate_flags from entry as rate[].flags even if
   7 skb does not match status. Patch corrects flags and also fixes
   8 mcs for legacy rates.
   9
  10 rt2800_rate_from_status() is based on Felix's mt76
  11 mt76x2_mac_process_tx_rate() function.
  12
  13 Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
  14 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  15 ---
  16  drivers/net/wireless/ralink/rt2x00/rt2800.h    |  2 ++
  17  drivers/net/wireless/ralink/rt2x00/rt2800lib.c | 35 +++++++++++++++++++++++++-
  18  2 files changed, 36 insertions(+), 1 deletion(-)
  19
  20 --- a/drivers/net/wireless/ralink/rt2x00/rt2800.h
  21 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800.h
  22 @@ -1760,6 +1760,8 @@
  23  #define TX_STA_FIFO_WCID               FIELD32(0x0000ff00)
  24  #define TX_STA_FIFO_SUCCESS_RATE       FIELD32(0xffff0000)
  25  #define TX_STA_FIFO_MCS                        FIELD32(0x007f0000)
  26 +#define TX_STA_FIFO_BW                 FIELD32(0x00800000)
  27 +#define TX_STA_FIFO_SGI                        FIELD32(0x01000000)
  28  #define TX_STA_FIFO_PHYMODE            FIELD32(0xc0000000)
  29
  30  /*
  31 --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  32 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  33 @@ -852,6 +852,39 @@ void rt2800_process_rxwi(struct queue_en
  34  }
  35  EXPORT_SYMBOL_GPL(rt2800_process_rxwi);
  36
  37 +static void rt2800_rate_from_status(struct skb_frame_desc *skbdesc,
  38 +                                   u32 status, enum nl80211_band band)
  39 +{
  40 +       u8 flags = 0;
  41 +       u8 idx = rt2x00_get_field32(status, TX_STA_FIFO_MCS);
  42 +
  43 +       switch (rt2x00_get_field32(status, TX_STA_FIFO_PHYMODE)) {
  44 +       case RATE_MODE_HT_GREENFIELD:
  45 +               flags |= IEEE80211_TX_RC_GREEN_FIELD;
  46 +               /* fall through */
  47 +       case RATE_MODE_HT_MIX:
  48 +               flags |= IEEE80211_TX_RC_MCS;
  49 +               break;
  50 +       case RATE_MODE_OFDM:
  51 +               if (band == NL80211_BAND_2GHZ)
  52 +                       idx += 4;
  53 +               break;
  54 +       case RATE_MODE_CCK:
  55 +               if (idx >= 8)
  56 +                       idx -= 8;
  57 +               break;
  58 +       }
  59 +
  60 +       if (rt2x00_get_field32(status, TX_STA_FIFO_BW))
  61 +               flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
  62 +
  63 +       if (rt2x00_get_field32(status, TX_STA_FIFO_SGI))
  64 +               flags |= IEEE80211_TX_RC_SHORT_GI;
  65 +
  66 +       skbdesc->tx_rate_idx = idx;
  67 +       skbdesc->tx_rate_flags = flags;
  68 +}
  69 +
  70  void rt2800_txdone_entry(struct queue_entry *entry, u32 status, __le32 *txwi,
  71                          bool match)
  72  {
  73 @@ -898,7 +931,7 @@ void rt2800_txdone_entry(struct queue_en
  74          * and provide retry count.
  75          */
  76         if (unlikely((aggr == 1 && ampdu == 0 && real_mcs != mcs)) || !match) {
  77 -               skbdesc->tx_rate_idx = real_mcs;
  78 +               rt2800_rate_from_status(skbdesc, status, rt2x00dev->curr_band);
  79                 mcs = real_mcs;
  80         }
  81