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-rw-r--r--package/mac80211/patches/470-ath5k_decrease_irq_load.patch140
1 files changed, 140 insertions, 0 deletions
diff --git a/package/mac80211/patches/470-ath5k_decrease_irq_load.patch b/package/mac80211/patches/470-ath5k_decrease_irq_load.patch
new file mode 100644
index 0000000000..5273bb075a
--- /dev/null
+++ b/package/mac80211/patches/470-ath5k_decrease_irq_load.patch
@@ -0,0 +1,140 @@
+--- a/drivers/net/wireless/ath/ath5k/ath5k.h
++++ b/drivers/net/wireless/ath/ath5k/ath5k.h
+@@ -872,6 +872,19 @@ enum ath5k_int {
+ AR5K_INT_QTRIG = 0x40000000, /* Non common */
+ AR5K_INT_GLOBAL = 0x80000000,
+
++ AR5K_INT_TX_ALL = AR5K_INT_TXOK
++ | AR5K_INT_TXDESC
++ | AR5K_INT_TXERR
++ | AR5K_INT_TXEOL
++ | AR5K_INT_TXURN,
++
++ AR5K_INT_RX_ALL = AR5K_INT_RXOK
++ | AR5K_INT_RXDESC
++ | AR5K_INT_RXERR
++ | AR5K_INT_RXNOFRM
++ | AR5K_INT_RXEOL
++ | AR5K_INT_RXORN,
++
+ AR5K_INT_COMMON = AR5K_INT_RXOK
+ | AR5K_INT_RXDESC
+ | AR5K_INT_RXERR
+--- a/drivers/net/wireless/ath/ath5k/base.c
++++ b/drivers/net/wireless/ath/ath5k/base.c
+@@ -1444,6 +1444,21 @@ ath5k_receive_frame_ok(struct ath5k_soft
+ }
+
+ static void
++ath5k_set_current_imask(struct ath5k_softc *sc)
++{
++ enum ath5k_int imask = sc->imask;
++ unsigned long flags;
++
++ spin_lock_irqsave(&sc->irqlock, flags);
++ if (sc->rx_pending)
++ imask &= ~AR5K_INT_RX_ALL;
++ if (sc->tx_pending)
++ imask &= ~AR5K_INT_TX_ALL;
++ ath5k_hw_set_imr(sc->ah, imask);
++ spin_unlock_irqrestore(&sc->irqlock, flags);
++}
++
++static void
+ ath5k_tasklet_rx(unsigned long data)
+ {
+ struct ath5k_rx_status rs = {};
+@@ -1506,6 +1521,8 @@ next:
+ } while (ath5k_rxbuf_setup(sc, bf) == 0);
+ unlock:
+ spin_unlock(&sc->rxbuflock);
++ sc->rx_pending = false;
++ ath5k_set_current_imask(sc);
+ }
+
+
+@@ -1693,6 +1710,9 @@ ath5k_tasklet_tx(unsigned long data)
+ for (i=0; i < AR5K_NUM_TX_QUEUES; i++)
+ if (sc->txqs[i].setup && (sc->ah->ah_txq_isr & BIT(i)))
+ ath5k_tx_processq(sc, &sc->txqs[i]);
++
++ sc->tx_pending = false;
++ ath5k_set_current_imask(sc);
+ }
+
+
+@@ -2122,6 +2142,20 @@ ath5k_intr_calibration_poll(struct ath5k
+ * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */
+ }
+
++static void
++ath5k_schedule_rx(struct ath5k_softc *sc)
++{
++ sc->rx_pending = true;
++ tasklet_schedule(&sc->rxtq);
++}
++
++static void
++ath5k_schedule_tx(struct ath5k_softc *sc)
++{
++ sc->tx_pending = true;
++ tasklet_schedule(&sc->txtq);
++}
++
+ irqreturn_t
+ ath5k_intr(int irq, void *dev_id)
+ {
+@@ -2164,7 +2198,7 @@ ath5k_intr(int irq, void *dev_id)
+ ieee80211_queue_work(sc->hw, &sc->reset_work);
+ }
+ else
+- tasklet_schedule(&sc->rxtq);
++ ath5k_schedule_rx(sc);
+ } else {
+ if (status & AR5K_INT_SWBA) {
+ tasklet_hi_schedule(&sc->beacontq);
+@@ -2182,10 +2216,10 @@ ath5k_intr(int irq, void *dev_id)
+ ath5k_hw_update_tx_triglevel(ah, true);
+ }
+ if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR))
+- tasklet_schedule(&sc->rxtq);
++ ath5k_schedule_rx(sc);
+ if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC
+ | AR5K_INT_TXERR | AR5K_INT_TXEOL))
+- tasklet_schedule(&sc->txtq);
++ ath5k_schedule_tx(sc);
+ if (status & AR5K_INT_BMISS) {
+ /* TODO */
+ }
+@@ -2204,6 +2238,9 @@ ath5k_intr(int irq, void *dev_id)
+
+ } while (ath5k_hw_is_intr_pending(ah) && --counter > 0);
+
++ if (sc->rx_pending || sc->tx_pending)
++ ath5k_set_current_imask(sc);
++
+ if (unlikely(!counter))
+ ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
+
+@@ -2575,6 +2612,8 @@ done:
+
+ static void stop_tasklets(struct ath5k_softc *sc)
+ {
++ sc->rx_pending = false;
++ sc->tx_pending = false;
+ tasklet_kill(&sc->rxtq);
+ tasklet_kill(&sc->txtq);
+ tasklet_kill(&sc->calib);
+--- a/drivers/net/wireless/ath/ath5k/base.h
++++ b/drivers/net/wireless/ath/ath5k/base.h
+@@ -207,6 +207,10 @@ struct ath5k_softc {
+
+ enum ath5k_int imask; /* interrupt mask copy */
+
++ spinlock_t irqlock;
++ bool rx_pending; /* rx tasklet pending */
++ bool tx_pending; /* tx tasklet pending */
++
+ u8 lladdr[ETH_ALEN];
+ u8 bssidmask[ETH_ALEN];
+