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

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Index: madwifi-trunk-r3280/ath/if_ath.c
===================================================================
--- madwifi-trunk-r3280.orig/ath/if_ath.c 2008-01-28 17:29:22.989895792 +0100
+++ madwifi-trunk-r3280/ath/if_ath.c 2008-01-28 20:00:09.319637124 +0100
@@ -184,7 +184,7 @@
struct sk_buff *, int, 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
@@ -542,7 +542,6 @@
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);
@@ -816,6 +815,8 @@
dev->set_mac_address = ath_set_mac_address;
dev->change_mtu = ath_change_mtu;
dev->tx_queue_len = ATH_TXBUF - ATH_TXBUF_MGT_RESERVED;
+ dev->poll = ath_rx_poll;
+ dev->weight = 64;
#ifdef USE_HEADERLEN_RESV
dev->hard_header_len += sizeof(struct ieee80211_qosframe) +
sizeof(struct llc) +
@@ -2206,6 +2207,7 @@
(status & HAL_INT_GLOBAL) ? " HAL_INT_GLOBAL" : ""
);
+ sc->sc_isr = status;
status &= sc->sc_imask; /* discard unasked for bits */
/* As soon as we know we have a real interrupt we intend to service,
* we will check to see if we need an initial hardware TSF reading.
@@ -2263,7 +2265,14 @@
}
if (status & (HAL_INT_RX | HAL_INT_RXPHY)) {
ath_uapsd_processtriggers(sc, hw_tsf);
- 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
@@ -2289,6 +2298,11 @@
}
}
#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) {
@@ -4011,10 +4025,10 @@
*
* 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);
}
@@ -4027,7 +4041,7 @@
DPRINTF(sc, ATH_DEBUG_KEYCACHE, "End\n");
netif_wake_queue(dev);
if (!in_softirq()) /* NB: see above */
- tasklet_enable(&sc->sc_rxtq);
+ netif_poll_enable(dev);
}
/*
@@ -6329,13 +6343,12 @@
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;
@@ -6347,8 +6360,11 @@
unsigned int len;
int type;
u_int phyerr;
+ u_int processed = 0, early_stop = 0;
+ u_int rx_limit = dev->quota;
DPRINTF(sc, ATH_DEBUG_RX_PROC, "invoked\n");
+process_rx_again:
do {
bf = STAILQ_FIRST(&sc->sc_rxbuf);
if (bf == NULL) { /* XXX ??? can this happen */
@@ -6372,6 +6388,13 @@
/* 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) {
EPRINTF(sc, "Dropping; buffer contains NULL skbuff.\n");
@@ -6419,6 +6442,7 @@
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) {
/*
@@ -6614,9 +6638,35 @@
STAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list);
ATH_RXBUF_UNLOCK_IRQ(sc);
} while (ath_rxbuf_init(sc, bf) == 0);
+ if (!early_stop) {
+ unsigned long flags;
+ /* Check if more data is received while we were
+ * processing the descriptor chain.
+ */
+#ifndef ATH_PRECISE_TSF
+ local_irq_save(flags);
+ if (sc->sc_isr & HAL_INT_RX) {
+ u_int64_t hw_tsf = ath_hal_gettsf64(ah);
+ sc->sc_isr &= ~HAL_INT_RX;
+ local_irq_restore(flags);
+ ath_uapsd_processtriggers(sc, hw_tsf);
+ 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);
+ local_irq_restore(flags);
+#endif
+ }
+
+ *budget -= processed;
/* rx signal state monitoring */
ath_hal_rxmonitor(ah, &sc->sc_halstats, &sc->sc_curchan);
+ return early_stop;
#undef PA2DESC
}
@@ -8267,12 +8317,24 @@
{
struct net_device *dev = (struct net_device *)data;
struct ath_softc *sc = dev->priv;
+ unsigned long flags;
+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);
+ local_irq_save(flags);
+ if (sc->sc_isr & HAL_INT_TX) {
+ sc->sc_isr &= ~HAL_INT_TX;
+ local_irq_restore(flags);
+ goto process_tx_again;
+ }
+ sc->sc_imask |= HAL_INT_TX;
+ ath_hal_intrset(sc->sc_ah, sc->sc_imask);
+ local_irq_restore(flags);
+
netif_wake_queue(dev);
if (sc->sc_softled)
@@ -8288,7 +8350,9 @@
{
struct net_device *dev = (struct net_device *)data;
struct ath_softc *sc = dev->priv;
+ unsigned long flags;
+process_tx_again:
/*
* Process each active queue.
*/
@@ -8309,6 +8373,16 @@
if (sc->sc_uapsdq && txqactive(sc->sc_ah, sc->sc_uapsdq->axq_qnum))
ath_tx_processq(sc, sc->sc_uapsdq);
+ local_irq_save(flags);
+ if (sc->sc_isr & HAL_INT_TX) {
+ sc->sc_isr &= ~HAL_INT_TX;
+ local_irq_restore(flags);
+ goto process_tx_again;
+ }
+ sc->sc_imask |= HAL_INT_TX;
+ ath_hal_intrset(sc->sc_ah, sc->sc_imask);
+ local_irq_restore(flags);
+
netif_wake_queue(dev);
if (sc->sc_softled)
@@ -8324,13 +8398,25 @@
struct net_device *dev = (struct net_device *)data;
struct ath_softc *sc = dev->priv;
unsigned int i;
+ unsigned long flags;
/* Process each active queue. This includes sc_cabq, sc_xrtq and
* sc_uapsdq */
+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]);
+ local_irq_save(flags);
+ if (sc->sc_isr & HAL_INT_TX) {
+ sc->sc_isr &= ~HAL_INT_TX;
+ local_irq_restore(flags);
+ goto process_tx_again;
+ }
+ sc->sc_imask |= HAL_INT_TX;
+ ath_hal_intrset(sc->sc_ah, sc->sc_imask);
+ local_irq_restore(flags);
+
netif_wake_queue(dev);
if (sc->sc_softled)
@@ -8405,6 +8491,7 @@
ath_draintxq(struct ath_softc *sc)
{
struct ath_hal *ah = sc->sc_ah;
+ int npend = 0;
unsigned int i;
/* XXX return value */
@@ -10261,9 +10348,9 @@
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-trunk-r3280/ath/if_athvar.h
===================================================================
--- madwifi-trunk-r3280.orig/ath/if_athvar.h 2008-01-28 17:29:22.997896245 +0100
+++ madwifi-trunk-r3280/ath/if_athvar.h 2008-01-28 17:45:06.903383316 +0100
@@ -50,6 +50,10 @@
#include <asm/io.h>
#include <linux/list.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.
@@ -728,7 +732,6 @@
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 */
@@ -741,6 +744,7 @@
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 */
@@ -854,6 +858,8 @@
#define ATH_TXBUF_LOCK_CHECK(_sc)
#endif
+#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-trunk-r3280/net80211/ieee80211_input.c
===================================================================
--- madwifi-trunk-r3280.orig/net80211/ieee80211_input.c 2008-01-28 17:29:23.005896702 +0100
+++ madwifi-trunk-r3280/net80211/ieee80211_input.c 2008-01-28 19:52:50.586635164 +0100
@@ -1197,7 +1197,7 @@
/* attach vlan tag */
struct ieee80211_node *ni_tmp = SKB_CB(skb)->ni;
if (vlan_hwaccel_receive_skb(skb, vap->iv_vlgrp, ni->ni_vlan) == NET_RX_DROP) {
- /* If netif_rx dropped the packet because
+ /* If netif_receive_skb dropped the packet because
* device was too busy */
if (ni_tmp != NULL) {
/* node reference was leaked */
@@ -1208,8 +1208,8 @@
skb = NULL; /* SKB is no longer ours */
} else {
struct ieee80211_node *ni_tmp = SKB_CB(skb)->ni;
- if (netif_rx(skb) == NET_RX_DROP) {
- /* If netif_rx dropped the packet because
+ if (netif_receive_skb(skb) == NET_RX_DROP) {
+ /* If netif_receive_skb dropped the packet because
* device was too busy */
if (ni_tmp != NULL) {
/* node reference was leaked */
@@ -2314,8 +2314,8 @@
skb1->protocol = __constant_htons(0x0019); /* ETH_P_80211_RAW */
ni_tmp = SKB_CB(skb1)->ni;
- if (netif_rx(skb1) == NET_RX_DROP) {
- /* If netif_rx dropped the packet because
+ if (netif_receive_skb(skb1) == NET_RX_DROP) {
+ /* If netif_receive_skb dropped the packet because
* device was too busy */
if (ni_tmp != NULL) {
/* node reference was leaked */
Index: madwifi-trunk-r3280/net80211/ieee80211_monitor.c
===================================================================
--- madwifi-trunk-r3280.orig/net80211/ieee80211_monitor.c 2008-01-28 17:29:23.013897159 +0100
+++ madwifi-trunk-r3280/net80211/ieee80211_monitor.c 2008-01-28 17:29:26.430091834 +0100
@@ -584,8 +584,8 @@
skb1->protocol =
__constant_htons(0x0019); /* ETH_P_80211_RAW */
- if (netif_rx(skb1) == NET_RX_DROP) {
- /* If netif_rx dropped the packet because
+ if (netif_receive_skb(skb1) == NET_RX_DROP) {
+ /* If netif_receive_skb dropped the packet because
* device was too busy, reclaim the ref. in
* the skb. */
if (SKB_CB(skb1)->ni != NULL)
Index: madwifi-trunk-r3280/net80211/ieee80211_skb.c
===================================================================
--- madwifi-trunk-r3280.orig/net80211/ieee80211_skb.c 2008-01-28 17:29:23.017897384 +0100
+++ madwifi-trunk-r3280/net80211/ieee80211_skb.c 2008-01-28 17:29:26.446092748 +0100
@@ -73,7 +73,7 @@
#undef dev_queue_xmit
#undef kfree_skb
#undef kfree_skb_fast
-#undef netif_rx
+#undef netif_receive_skb
#undef pskb_copy
#undef skb_clone
#undef skb_copy
@@ -638,8 +638,8 @@
grp, vlan_tag);
}
-int netif_rx_debug(struct sk_buff *skb, const char* func, int line) {
- return netif_rx(untrack_skb(skb, 0, func, line, __func__, __LINE__));
+int netif_receive_skb_debug(struct sk_buff *skb, const char* func, int line) {
+ return netif_receive_skb(untrack_skb(skb, 0, func, line, __func__, __LINE__));
}
struct sk_buff * alloc_skb_debug(unsigned int length, gfp_t gfp_mask,
@@ -760,7 +760,7 @@
}
EXPORT_SYMBOL(vlan_hwaccel_receive_skb_debug);
-EXPORT_SYMBOL(netif_rx_debug);
+EXPORT_SYMBOL(netif_receive_skb_debug);
EXPORT_SYMBOL(alloc_skb_debug);
EXPORT_SYMBOL(dev_alloc_skb_debug);
EXPORT_SYMBOL(skb_clone_debug);
Index: madwifi-trunk-r3280/net80211/ieee80211_skb.h
===================================================================
--- madwifi-trunk-r3280.orig/net80211/ieee80211_skb.h 2008-01-28 17:29:23.029898072 +0100
+++ madwifi-trunk-r3280/net80211/ieee80211_skb.h 2008-01-28 17:29:26.458093432 +0100
@@ -116,7 +116,7 @@
int vlan_hwaccel_receive_skb_debug(struct sk_buff *skb,
struct vlan_group *grp, unsigned short vlan_tag,
const char* func, int line);
-int netif_rx_debug(struct sk_buff *skb, const char* func, int line);
+int netif_receive_skb_debug(struct sk_buff *skb, const char* func, int line);
struct sk_buff * alloc_skb_debug(unsigned int length, gfp_t gfp_mask,
const char *func, int line);
struct sk_buff * dev_alloc_skb_debug(unsigned int length,
@@ -151,7 +151,7 @@
#undef dev_queue_xmit
#undef kfree_skb
#undef kfree_skb_fast
-#undef netif_rx
+#undef netif_receive_skb
#undef pskb_copy
#undef skb_clone
#undef skb_copy
@@ -168,8 +168,8 @@
skb_copy_expand_debug(_skb, _newheadroom, _newtailroom, _gfp_mask, __func__, __LINE__)
#define vlan_hwaccel_receive_skb(_skb, _grp, _tag) \
vlan_hwaccel_receive_skb_debug(_skb, _grp, _tag, __func__, __LINE__)
-#define netif_rx(_skb) \
- netif_rx_debug(_skb, __func__, __LINE__)
+#define netif_receive_skb(_skb) \
+ netif_receive_skb_debug(_skb, __func__, __LINE__)
#define alloc_skb(_length, _gfp_mask) \
alloc_skb_debug(_length, _gfp_mask, __func__, __LINE__)
#define dev_alloc_skb(_length) \
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