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openwrt/package/madwifi/patches/300-napi_polling.patch

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Index: madwifi-ng-r2568-20070710/ath/if_ath.c
===================================================================
--- madwifi-ng-r2568-20070710.orig/ath/if_ath.c 2007-10-20 20:52:09.000000000 +0200
+++ madwifi-ng-r2568-20070710/ath/if_ath.c 2007-10-20 20:52:42.000000000 +0200
@@ -170,7 +170,7 @@
int, u_int64_t);
static void ath_setdefantenna(struct ath_softc *, u_int);
static struct ath_txq *ath_txq_setup(struct ath_softc *, int, int);
-static void ath_rx_tasklet(TQUEUE_ARG);
+static int ath_rx_poll(struct net_device *dev, int *budget);
static int ath_hardstart(struct sk_buff *, struct net_device *);
static int ath_mgtstart(struct ieee80211com *, struct sk_buff *);
#ifdef ATH_SUPERG_COMP
@@ -444,7 +444,6 @@
ATH_TXBUF_LOCK_INIT(sc);
ATH_RXBUF_LOCK_INIT(sc);
- ATH_INIT_TQUEUE(&sc->sc_rxtq, ath_rx_tasklet, dev);
ATH_INIT_TQUEUE(&sc->sc_txtq, ath_tx_tasklet, dev);
ATH_INIT_TQUEUE(&sc->sc_bmisstq, ath_bmiss_tasklet, dev);
ATH_INIT_TQUEUE(&sc->sc_bstucktq, ath_bstuck_tasklet, dev);
@@ -691,6 +690,8 @@
dev->set_mac_address = ath_set_mac_address;
dev->change_mtu = ath_change_mtu;
dev->tx_queue_len = ATH_TXBUF - 1; /* 1 for mgmt frame */
+ dev->poll = ath_rx_poll;
+ dev->weight = 64;
#ifdef USE_HEADERLEN_RESV
dev->hard_header_len += sizeof(struct ieee80211_qosframe) +
sizeof(struct llc) +
@@ -1667,6 +1668,7 @@
*/
ath_hal_getisr(ah, &status); /* NB: clears ISR too */
DPRINTF(sc, ATH_DEBUG_INTR, "%s: status 0x%x\n", __func__, status);
+ sc->sc_isr = status;
status &= sc->sc_imask; /* discard unasked for bits */
if (status & HAL_INT_FATAL) {
sc->sc_stats.ast_hardware++;
@@ -1702,7 +1704,14 @@
if (status & HAL_INT_RX) {
sc->sc_tsf = ath_hal_gettsf64(ah);
ath_uapsd_processtriggers(sc);
- ATH_SCHEDULE_TQUEUE(&sc->sc_rxtq, &needmark);
+ sc->sc_isr &= ~HAL_INT_RX;
+ if (netif_rx_schedule_prep(dev)) {
+#ifndef ATH_PRECISE_TSF
+ sc->sc_imask &= ~HAL_INT_RX;
+ ath_hal_intrset(ah, sc->sc_imask);
+#endif
+ __netif_rx_schedule(dev);
+ }
}
if (status & HAL_INT_TX) {
#ifdef ATH_SUPERG_DYNTURBO
@@ -1728,6 +1737,11 @@
}
}
#endif
+ /* disable transmit interrupt */
+ sc->sc_isr &= ~HAL_INT_TX;
+ ath_hal_intrset(ah, sc->sc_imask & ~HAL_INT_TX);
+ sc->sc_imask &= ~HAL_INT_TX;
+
ATH_SCHEDULE_TQUEUE(&sc->sc_txtq, &needmark);
}
if (status & HAL_INT_BMISS) {
@@ -3318,10 +3332,10 @@
*
* XXX Using in_softirq is not right since we might
* be called from other soft irq contexts than
- * ath_rx_tasklet.
+ * ath_rx_poll
*/
if (!in_softirq())
- tasklet_disable(&sc->sc_rxtq);
+ netif_poll_disable(dev);
netif_stop_queue(dev);
}
@@ -3334,7 +3348,7 @@
DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__);
netif_start_queue(dev);
if (!in_softirq()) /* NB: see above */
- tasklet_enable(&sc->sc_rxtq);
+ netif_poll_enable(dev);
}
/*
@@ -5589,13 +5603,12 @@
sc->sc_rxotherant = 0;
}
-static void
-ath_rx_tasklet(TQUEUE_ARG data)
+static int
+ath_rx_poll(struct net_device *dev, int *budget)
{
#define PA2DESC(_sc, _pa) \
((struct ath_desc *)((caddr_t)(_sc)->sc_rxdma.dd_desc + \
((_pa) - (_sc)->sc_rxdma.dd_desc_paddr)))
- struct net_device *dev = (struct net_device *)data;
struct ath_buf *bf;
struct ath_softc *sc = dev->priv;
struct ieee80211com *ic = &sc->sc_ic;
@@ -5608,12 +5621,15 @@
int type;
u_int phyerr;
u_int64_t rs_tsf;
+ u_int processed = 0, early_stop = 0;
+ u_int rx_limit = dev->quota;
/* Let the 802.11 layer know about the new noise floor */
sc->sc_channoise = ath_hal_get_channel_noise(ah, &(sc->sc_curchan));
ic->ic_channoise = sc->sc_channoise;
DPRINTF(sc, ATH_DEBUG_RX_PROC, "%s\n", __func__);
+process_rx_again:
do {
bf = STAILQ_FIRST(&sc->sc_rxbuf);
if (bf == NULL) { /* XXX ??? can this happen */
@@ -5637,6 +5653,13 @@
/* NB: never process the self-linked entry at the end */
break;
}
+
+ processed++;
+ if (rx_limit-- < 0) {
+ early_stop = 1;
+ break;
+ }
+
skb = bf->bf_skb;
if (skb == NULL) { /* XXX ??? can this happen */
printk("%s: no skbuff (%s)\n", DEV_NAME(dev), __func__);
@@ -5675,6 +5698,7 @@
sc->sc_stats.ast_rx_phyerr++;
phyerr = rs->rs_phyerr & 0x1f;
sc->sc_stats.ast_rx_phy[phyerr]++;
+ goto rx_next;
}
if (rs->rs_status & HAL_RXERR_DECRYPT) {
/*
@@ -5892,9 +5916,33 @@
STAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list);
ATH_RXBUF_UNLOCK_IRQ(sc);
} while (ath_rxbuf_init(sc, bf) == 0);
+ if (!early_stop) {
+ /* Check if more data is received while we were
+ * processing the descriptor chain.
+ */
+#ifndef ATH_PRECISE_TSF
+ ATH_DISABLE_INTR();
+ if (sc->sc_isr & HAL_INT_RX) {
+ sc->sc_isr &= ~HAL_INT_RX;
+ ATH_ENABLE_INTR();
+ ath_uapsd_processtriggers(sc);
+ goto process_rx_again;
+ }
+#endif
+ netif_rx_complete(dev);
+
+#ifndef ATH_PRECISE_TSF
+ sc->sc_imask |= HAL_INT_RX;
+ ath_hal_intrset(ah, sc->sc_imask);
+ ATH_ENABLE_INTR();
+#endif
+ }
+
+ *budget -= processed;
/* rx signal state monitoring */
ath_hal_rxmonitor(ah, &sc->sc_halstats, &sc->sc_curchan);
+ return early_stop;
#undef PA2DESC
}
@@ -7517,11 +7565,22 @@
struct net_device *dev = (struct net_device *)data;
struct ath_softc *sc = dev->priv;
+process_tx_again:
if (txqactive(sc->sc_ah, 0))
ath_tx_processq(sc, &sc->sc_txq[0]);
if (txqactive(sc->sc_ah, sc->sc_cabq->axq_qnum))
ath_tx_processq(sc, sc->sc_cabq);
+ ATH_DISABLE_INTR();
+ if (sc->sc_isr & HAL_INT_TX) {
+ sc->sc_isr &= ~HAL_INT_TX;
+ ATH_ENABLE_INTR();
+ goto process_tx_again;
+ }
+ sc->sc_imask |= HAL_INT_TX;
+ ath_hal_intrset(sc->sc_ah, sc->sc_imask);
+ ATH_ENABLE_INTR();
+
netif_wake_queue(dev);
if (sc->sc_softled)
@@ -7538,6 +7597,7 @@
struct net_device *dev = (struct net_device *)data;
struct ath_softc *sc = dev->priv;
+process_tx_again:
/*
* Process each active queue.
*/
@@ -7558,6 +7618,16 @@
if (sc->sc_uapsdq && txqactive(sc->sc_ah, sc->sc_uapsdq->axq_qnum))
ath_tx_processq(sc, sc->sc_uapsdq);
+ ATH_DISABLE_INTR();
+ if (sc->sc_isr & HAL_INT_TX) {
+ sc->sc_isr &= ~HAL_INT_TX;
+ ATH_ENABLE_INTR();
+ goto process_tx_again;
+ }
+ sc->sc_imask |= HAL_INT_TX;
+ ath_hal_intrset(sc->sc_ah, sc->sc_imask);
+ ATH_ENABLE_INTR();
+
netif_wake_queue(dev);
if (sc->sc_softled)
@@ -7575,6 +7645,7 @@
unsigned int i;
/* Process each active queue. */
+process_tx_again:
for (i = 0; i < HAL_NUM_TX_QUEUES; i++)
if (ATH_TXQ_SETUP(sc, i) && txqactive(sc->sc_ah, i))
ath_tx_processq(sc, &sc->sc_txq[i]);
@@ -7583,6 +7654,16 @@
ath_tx_processq(sc, sc->sc_xrtxq);
#endif
+ ATH_DISABLE_INTR();
+ if (sc->sc_isr & HAL_INT_TX) {
+ sc->sc_isr &= ~HAL_INT_TX;
+ ATH_ENABLE_INTR();
+ goto process_tx_again;
+ }
+ sc->sc_imask |= HAL_INT_TX;
+ ath_hal_intrset(sc->sc_ah, sc->sc_imask);
+ ATH_ENABLE_INTR();
+
netif_wake_queue(dev);
if (sc->sc_softled)
@@ -7681,6 +7762,7 @@
ath_draintxq(struct ath_softc *sc)
{
struct ath_hal *ah = sc->sc_ah;
+ int npend = 0;
unsigned int i;
/* XXX return value */
@@ -9189,9 +9271,9 @@
dev->mtu = mtu;
if ((dev->flags & IFF_RUNNING) && !sc->sc_invalid) {
/* NB: the rx buffers may need to be reallocated */
- tasklet_disable(&sc->sc_rxtq);
+ netif_poll_disable(dev);
error = ath_reset(dev);
- tasklet_enable(&sc->sc_rxtq);
+ netif_poll_enable(dev);
}
ATH_UNLOCK(sc);
Index: madwifi-ng-r2568-20070710/ath/if_athvar.h
===================================================================
--- madwifi-ng-r2568-20070710.orig/ath/if_athvar.h 2007-10-20 20:52:09.000000000 +0200
+++ madwifi-ng-r2568-20070710/ath/if_athvar.h 2007-10-20 20:52:42.000000000 +0200
@@ -49,6 +49,10 @@
#include "net80211/ieee80211.h" /* XXX for WME_NUM_AC */
#include <asm/io.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+#define irqs_disabled() 0
+#endif
+
/*
* Deduce if tasklets are available. If not then
* fall back to using the immediate work queue.
@@ -635,7 +639,6 @@
struct ath_buf *sc_rxbufcur; /* current rx buffer */
u_int32_t *sc_rxlink; /* link ptr in last RX desc */
spinlock_t sc_rxbuflock;
- struct ATH_TQ_STRUCT sc_rxtq; /* rx intr tasklet */
struct ATH_TQ_STRUCT sc_rxorntq; /* rxorn intr tasklet */
u_int8_t sc_defant; /* current default antenna */
u_int8_t sc_rxotherant; /* RXs on non-default antenna */
@@ -648,6 +651,7 @@
u_int sc_txintrperiod; /* tx interrupt batching */
struct ath_txq sc_txq[HAL_NUM_TX_QUEUES];
struct ath_txq *sc_ac2q[WME_NUM_AC]; /* WME AC -> h/w qnum */
+ HAL_INT sc_isr; /* unmasked ISR state */
struct ATH_TQ_STRUCT sc_txtq; /* tx intr tasklet */
u_int8_t sc_grppoll_str[GRPPOLL_RATE_STR_LEN];
struct ath_descdma sc_bdma; /* beacon descriptors */
@@ -720,6 +724,8 @@
#define ATH_TXBUF_LOCK_ASSERT(_sc) \
KASSERT(spin_is_locked(&(_sc)->sc_txbuflock), ("txbuf not locked!"))
+#define ATH_DISABLE_INTR local_irq_disable
+#define ATH_ENABLE_INTR local_irq_enable
#define ATH_RXBUF_LOCK_INIT(_sc) spin_lock_init(&(_sc)->sc_rxbuflock)
#define ATH_RXBUF_LOCK_DESTROY(_sc)
Index: madwifi-ng-r2568-20070710/net80211/ieee80211_input.c
===================================================================
--- madwifi-ng-r2568-20070710.orig/net80211/ieee80211_input.c 2007-10-20 20:52:09.000000000 +0200
+++ madwifi-ng-r2568-20070710/net80211/ieee80211_input.c 2007-10-20 20:52:39.000000000 +0200
@@ -1128,8 +1128,9 @@
if (ni->ni_vlan != 0 && vap->iv_vlgrp != NULL) {
/* attach vlan tag */
vlan_hwaccel_receive_skb(skb, vap->iv_vlgrp, ni->ni_vlan);
- } else
- netif_rx(skb);
+ } else {
+ netif_receive_skb(skb);
+ }
dev->last_rx = jiffies;
}
}
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