package/mac80211/patches/470-ath5k_decrease_irq_load.patch

   1 --- a/drivers/net/wireless/ath/ath5k/ath5k.h
   2 +++ b/drivers/net/wireless/ath/ath5k/ath5k.h
   3 @@ -872,6 +872,19 @@ enum ath5k_int {
   4         AR5K_INT_QTRIG  =       0x40000000, /* Non common */
   5         AR5K_INT_GLOBAL =       0x80000000,
   6
   7 +       AR5K_INT_TX_ALL = AR5K_INT_TXOK
   8 +               | AR5K_INT_TXDESC
   9 +               | AR5K_INT_TXERR
  10 +               | AR5K_INT_TXEOL
  11 +               | AR5K_INT_TXURN,
  12 +
  13 +       AR5K_INT_RX_ALL = AR5K_INT_RXOK
  14 +               | AR5K_INT_RXDESC
  15 +               | AR5K_INT_RXERR
  16 +               | AR5K_INT_RXNOFRM
  17 +               | AR5K_INT_RXEOL
  18 +               | AR5K_INT_RXORN,
  19 +
  20         AR5K_INT_COMMON  = AR5K_INT_RXOK
  21                 | AR5K_INT_RXDESC
  22                 | AR5K_INT_RXERR
  23 --- a/drivers/net/wireless/ath/ath5k/base.c
  24 +++ b/drivers/net/wireless/ath/ath5k/base.c
  25 @@ -1444,6 +1444,21 @@ ath5k_receive_frame_ok(struct ath5k_soft
  26  }
  27
  28  static void
  29 +ath5k_set_current_imask(struct ath5k_softc *sc)
  30 +{
  31 +       enum ath5k_int imask = sc->imask;
  32 +       unsigned long flags;
  33 +
  34 +       spin_lock_irqsave(&sc->irqlock, flags);
  35 +       if (sc->rx_pending)
  36 +               imask &= ~AR5K_INT_RX_ALL;
  37 +       if (sc->tx_pending)
  38 +               imask &= ~AR5K_INT_TX_ALL;
  39 +       ath5k_hw_set_imr(sc->ah, imask);
  40 +       spin_unlock_irqrestore(&sc->irqlock, flags);
  41 +}
  42 +
  43 +static void
  44  ath5k_tasklet_rx(unsigned long data)
  45  {
  46         struct ath5k_rx_status rs = {};
  47 @@ -1506,6 +1521,8 @@ next:
  48         } while (ath5k_rxbuf_setup(sc, bf) == 0);
  49  unlock:
  50         spin_unlock(&sc->rxbuflock);
  51 +       sc->rx_pending = false;
  52 +       ath5k_set_current_imask(sc);
  53  }
  54
  55
  56 @@ -1693,6 +1710,9 @@ ath5k_tasklet_tx(unsigned long data)
  57         for (i=0; i < AR5K_NUM_TX_QUEUES; i++)
  58                 if (sc->txqs[i].setup && (sc->ah->ah_txq_isr & BIT(i)))
  59                         ath5k_tx_processq(sc, &sc->txqs[i]);
  60 +
  61 +       sc->tx_pending = false;
  62 +       ath5k_set_current_imask(sc);
  63  }
  64
  65
  66 @@ -2122,6 +2142,20 @@ ath5k_intr_calibration_poll(struct ath5k
  67          * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */
  68  }
  69
  70 +static void
  71 +ath5k_schedule_rx(struct ath5k_softc *sc)
  72 +{
  73 +       sc->rx_pending = true;
  74 +       tasklet_schedule(&sc->rxtq);
  75 +}
  76 +
  77 +static void
  78 +ath5k_schedule_tx(struct ath5k_softc *sc)
  79 +{
  80 +       sc->tx_pending = true;
  81 +       tasklet_schedule(&sc->txtq);
  82 +}
  83 +
  84  irqreturn_t
  85  ath5k_intr(int irq, void *dev_id)
  86  {
  87 @@ -2164,7 +2198,7 @@ ath5k_intr(int irq, void *dev_id)
  88                                 ieee80211_queue_work(sc->hw, &sc->reset_work);
  89                         }
  90                         else
  91 -                               tasklet_schedule(&sc->rxtq);
  92 +                               ath5k_schedule_rx(sc);
  93                 } else {
  94                         if (status & AR5K_INT_SWBA) {
  95                                 tasklet_hi_schedule(&sc->beacontq);
  96 @@ -2182,10 +2216,10 @@ ath5k_intr(int irq, void *dev_id)
  97                                 ath5k_hw_update_tx_triglevel(ah, true);
  98                         }
  99                         if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR))
 100 -                               tasklet_schedule(&sc->rxtq);
 101 +                               ath5k_schedule_rx(sc);
 102                         if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC
 103                                         | AR5K_INT_TXERR | AR5K_INT_TXEOL))
 104 -                               tasklet_schedule(&sc->txtq);
 105 +                               ath5k_schedule_tx(sc);
 106                         if (status & AR5K_INT_BMISS) {
 107                                 /* TODO */
 108                         }
 109 @@ -2204,6 +2238,9 @@ ath5k_intr(int irq, void *dev_id)
 110
 111         } while (ath5k_hw_is_intr_pending(ah) && --counter > 0);
 112
 113 +       if (sc->rx_pending || sc->tx_pending)
 114 +               ath5k_set_current_imask(sc);
 115 +
 116         if (unlikely(!counter))
 117                 ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
 118
 119 @@ -2575,6 +2612,8 @@ done:
 120
 121  static void stop_tasklets(struct ath5k_softc *sc)
 122  {
 123 +       sc->rx_pending = false;
 124 +       sc->tx_pending = false;
 125         tasklet_kill(&sc->rxtq);
 126         tasklet_kill(&sc->txtq);
 127         tasklet_kill(&sc->calib);
 128 --- a/drivers/net/wireless/ath/ath5k/base.h
 129 +++ b/drivers/net/wireless/ath/ath5k/base.h
 130 @@ -207,6 +207,10 @@ struct ath5k_softc {
 131
 132         enum ath5k_int          imask;          /* interrupt mask copy */
 133
 134 +       spinlock_t              irqlock;
 135 +       bool                    rx_pending;     /* rx tasklet pending */
 136 +       bool                    tx_pending;     /* tx tasklet pending */
 137 +
 138         u8                      lladdr[ETH_ALEN];
 139         u8                      bssidmask[ETH_ALEN];
 140