diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/ath9k/main.c | 197 |
1 files changed, 95 insertions, 102 deletions
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c index 99a6852871e2..76c58cc74b27 100644 --- a/drivers/net/wireless/ath9k/main.c +++ b/drivers/net/wireless/ath9k/main.c @@ -456,133 +456,124 @@ static void ath9k_tasklet(unsigned long data) u32 status = sc->intrstatus; if (status & ATH9K_INT_FATAL) { - /* need a chip reset */ ath_reset(sc, false); return; - } else { + } - if (status & - (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN)) { - spin_lock_bh(&sc->rx.rxflushlock); - ath_rx_tasklet(sc, 0); - spin_unlock_bh(&sc->rx.rxflushlock); - } - /* XXX: optimize this */ - if (status & ATH9K_INT_TX) - ath_tx_tasklet(sc); + if (status & (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN)) { + spin_lock_bh(&sc->rx.rxflushlock); + ath_rx_tasklet(sc, 0); + spin_unlock_bh(&sc->rx.rxflushlock); } + if (status & ATH9K_INT_TX) + ath_tx_tasklet(sc); + /* re-enable hardware interrupt */ ath9k_hw_set_interrupts(sc->sc_ah, sc->imask); } irqreturn_t ath_isr(int irq, void *dev) { +#define SCHED_INTR ( \ + ATH9K_INT_FATAL | \ + ATH9K_INT_RXORN | \ + ATH9K_INT_RXEOL | \ + ATH9K_INT_RX | \ + ATH9K_INT_TX | \ + ATH9K_INT_BMISS | \ + ATH9K_INT_CST | \ + ATH9K_INT_TSFOOR) + struct ath_softc *sc = dev; struct ath_hw *ah = sc->sc_ah; enum ath9k_int status; bool sched = false; - do { - if (sc->sc_flags & SC_OP_INVALID) { - /* - * The hardware is not ready/present, don't - * touch anything. Note this can happen early - * on if the IRQ is shared. - */ - return IRQ_NONE; - } - if (!ath9k_hw_intrpend(ah)) { /* shared irq, not for us */ - return IRQ_NONE; - } + /* + * The hardware is not ready/present, don't + * touch anything. Note this can happen early + * on if the IRQ is shared. + */ + if (sc->sc_flags & SC_OP_INVALID) + return IRQ_NONE; - /* - * Figure out the reason(s) for the interrupt. Note - * that the hal returns a pseudo-ISR that may include - * bits we haven't explicitly enabled so we mask the - * value to insure we only process bits we requested. - */ - ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */ + ath9k_ps_wakeup(sc); - status &= sc->imask; /* discard unasked-for bits */ + /* shared irq, not for us */ + + if (!ath9k_hw_intrpend(ah)) { + ath9k_ps_restore(sc); + return IRQ_NONE; + } + + /* + * Figure out the reason(s) for the interrupt. Note + * that the hal returns a pseudo-ISR that may include + * bits we haven't explicitly enabled so we mask the + * value to insure we only process bits we requested. + */ + ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */ + status &= sc->imask; /* discard unasked-for bits */ + + /* + * If there are no status bits set, then this interrupt was not + * for me (should have been caught above). + */ + if (!status) { + ath9k_ps_restore(sc); + return IRQ_NONE; + } + /* Cache the status */ + sc->intrstatus = status; + + if (status & SCHED_INTR) + sched = true; + + /* + * If a FATAL or RXORN interrupt is received, we have to reset the + * chip immediately. + */ + if (status & (ATH9K_INT_FATAL | ATH9K_INT_RXORN)) + goto chip_reset; + + if (status & ATH9K_INT_SWBA) + tasklet_schedule(&sc->bcon_tasklet); + + if (status & ATH9K_INT_TXURN) + ath9k_hw_updatetxtriglevel(ah, true); + + if (status & ATH9K_INT_MIB) { /* - * If there are no status bits set, then this interrupt was not - * for me (should have been caught above). + * Disable interrupts until we service the MIB + * interrupt; otherwise it will continue to + * fire. */ - if (!status) - return IRQ_NONE; - - sc->intrstatus = status; - ath9k_ps_wakeup(sc); + ath9k_hw_set_interrupts(ah, 0); + /* + * Let the hal handle the event. We assume + * it will clear whatever condition caused + * the interrupt. + */ + ath9k_hw_procmibevent(ah, &sc->nodestats); + ath9k_hw_set_interrupts(ah, sc->imask); + } - if (status & ATH9K_INT_FATAL) { - /* need a chip reset */ - sched = true; - } else if (status & ATH9K_INT_RXORN) { - /* need a chip reset */ + if (status & ATH9K_INT_TIM_TIMER) { + if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) { + /* Clear RxAbort bit so that we can + * receive frames */ + ath9k_hw_setpower(ah, ATH9K_PM_AWAKE); + ath9k_hw_setrxabort(ah, 0); sched = true; - } else { - if (status & ATH9K_INT_SWBA) { - /* schedule a tasklet for beacon handling */ - tasklet_schedule(&sc->bcon_tasklet); - } - if (status & ATH9K_INT_RXEOL) { - /* - * NB: the hardware should re-read the link when - * RXE bit is written, but it doesn't work - * at least on older hardware revs. - */ - sched = true; - } - - if (status & ATH9K_INT_TXURN) - /* bump tx trigger level */ - ath9k_hw_updatetxtriglevel(ah, true); - /* XXX: optimize this */ - if (status & ATH9K_INT_RX) - sched = true; - if (status & ATH9K_INT_TX) - sched = true; - if (status & ATH9K_INT_BMISS) - sched = true; - /* carrier sense timeout */ - if (status & ATH9K_INT_CST) - sched = true; - if (status & ATH9K_INT_MIB) { - /* - * Disable interrupts until we service the MIB - * interrupt; otherwise it will continue to - * fire. - */ - ath9k_hw_set_interrupts(ah, 0); - /* - * Let the hal handle the event. We assume - * it will clear whatever condition caused - * the interrupt. - */ - ath9k_hw_procmibevent(ah, &sc->nodestats); - ath9k_hw_set_interrupts(ah, sc->imask); - } - if (status & ATH9K_INT_TIM_TIMER) { - if (!(ah->caps.hw_caps & - ATH9K_HW_CAP_AUTOSLEEP)) { - /* Clear RxAbort bit so that we can - * receive frames */ - ath9k_hw_setpower(ah, ATH9K_PM_AWAKE); - ath9k_hw_setrxabort(ah, 0); - sched = true; - sc->sc_flags |= SC_OP_WAIT_FOR_BEACON; - } - } - if (status & ATH9K_INT_TSFOOR) { - /* FIXME: Handle this interrupt for power save */ - sched = true; - } + sc->sc_flags |= SC_OP_WAIT_FOR_BEACON; } - ath9k_ps_restore(sc); - } while (0); + } +chip_reset: + + ath9k_ps_restore(sc); ath_debug_stat_interrupt(sc, status); if (sched) { @@ -592,6 +583,8 @@ irqreturn_t ath_isr(int irq, void *dev) } return IRQ_HANDLED; + +#undef SCHED_INTR } static u32 ath_get_extchanmode(struct ath_softc *sc, |
