rename patches-r3776 to patches-testing

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11868 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 529 insertions, 0 deletions

diff --git a/package/madwifi/patches-testing/300-napi_polling.patch b/package/madwifi/patches-testing/300-napi_polling.patch
new file mode 100644
index 0000000000..27dd838db0
--- /dev/null
+++ b/package/madwifi/patches-testing/300-napi_polling.patch
@@ -0,0 +1,529 @@
+--- a/ath/if_ath.c
++++ b/ath/if_ath.c
+@@ -182,7 +182,11 @@
+ 	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);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++static int ath_rx_poll(struct napi_struct *napi, int budget);
++#else
++static int ath_rx_poll(struct net_device *dev, int *budget);
++#endif
+ static int ath_hardstart(struct sk_buff *, struct net_device *);
+ static int ath_mgtstart(struct ieee80211com *, struct sk_buff *);
+ #ifdef ATH_SUPERG_COMP
+@@ -331,6 +335,9 @@
+ static u_int32_t ath_set_clamped_maxtxpower(struct ath_softc *sc, 
+ 		u_int32_t new_clamped_maxtxpower);
+ 
++static void ath_poll_disable(struct net_device *dev);
++static void ath_poll_enable(struct net_device *dev);
++
+ static void ath_scanbufs(struct ath_softc *sc);
+ static int ath_debug_iwpriv(struct ieee80211com *ic, 
+ 		unsigned int param, unsigned int value);
+@@ -518,7 +525,6 @@
+ 
+ 	atomic_set(&sc->sc_txbuf_counter, 0);
+ 
+-	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);
+@@ -833,6 +839,12 @@
+ 	dev->set_mac_address = ath_set_mac_address;
+ 	dev->change_mtu = ath_change_mtu;
+ 	dev->tx_queue_len = ATH_TXBUF - ATH_TXBUF_MGT_RESERVED;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++	netif_napi_add(dev, &sc->sc_napi, ath_rx_poll, 64);
++#else
++	dev->poll = ath_rx_poll;
++	dev->weight = 64;
++#endif
+ #ifdef USE_HEADERLEN_RESV
+ 	dev->hard_header_len += sizeof(struct ieee80211_qosframe) +
+ 				sizeof(struct llc) +
+@@ -1770,7 +1782,7 @@
+ }
+ 
+ static void
+-ath_intr_process_rx_descriptors(struct ath_softc *sc, int *pneedmark, u_int64_t hw_tsf)
++ath_intr_process_rx_descriptors(struct ath_softc *sc, int *pneedmark, u_int64_t hw_tsf, int schedule)
+ {
+ 	struct ath_hal *ah = sc->sc_ah;
+ 	struct ath_desc *ds;
+@@ -2252,8 +2264,25 @@
+ 	}
+ 
+ 	/* If we got something to process, schedule rx queue to handle it */
+-	if (count)
+-		ATH_SCHEDULE_TQUEUE(&sc->sc_rxtq, pneedmark);
++	if (count) {
++		sc->sc_isr &= ~HAL_INT_RX;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++		if (netif_rx_schedule_prep(sc->sc_dev, &sc->sc_napi))
++#else
++		if (netif_rx_schedule_prep(sc->sc_dev))
++#endif
++		{
++#ifndef ATH_PRECISE_TSF
++			sc->sc_imask &= ~HAL_INT_RX;
++			ath_hal_intrset(ah, sc->sc_imask);
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++			__netif_rx_schedule(sc->sc_dev, &sc->sc_napi);
++#else
++			__netif_rx_schedule(sc->sc_dev);
++#endif
++		}
++	}
+ 	ATH_RXBUF_UNLOCK_IRQ(sc);
+ #undef PA2DESC
+ }
+@@ -2343,6 +2372,7 @@
+ 		(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. 
+@@ -2400,7 +2430,7 @@
+ 		}
+ 		if (status & (HAL_INT_RX | HAL_INT_RXPHY)) {
+ 			/* NB: Will schedule rx tasklet if necessary. */
+-			ath_intr_process_rx_descriptors(sc, &needmark, hw_tsf);
++			ath_intr_process_rx_descriptors(sc, &needmark, hw_tsf, 1);
+ 		}
+ 		if (status & HAL_INT_TX) {
+ #ifdef ATH_SUPERG_DYNTURBO
+@@ -2426,6 +2456,11 @@
+ 				}
+ 			}
+ #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) {
+@@ -2617,6 +2652,7 @@
+ 	if (sc->sc_tx99 != NULL)
+ 		sc->sc_tx99->start(sc->sc_tx99);
+ #endif
++	ath_poll_enable(dev);
+ 
+ done:
+ 	ATH_UNLOCK(sc);
+@@ -2657,6 +2693,9 @@
+ 		if (sc->sc_tx99 != NULL)
+ 			sc->sc_tx99->stop(sc->sc_tx99);
+ #endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++		ath_poll_disable(dev);
++#endif
+ 		netif_stop_queue(dev);	/* XXX re-enabled by ath_newstate */
+ 		dev->flags &= ~IFF_RUNNING;	/* NB: avoid recursion */
+ 		ieee80211_stop_running(ic);	/* stop all VAPs */
+@@ -4109,6 +4148,43 @@
+ 	return ath_keyset(sc, k, mac, vap->iv_bss);
+ }
+ 
++static void ath_poll_disable(struct net_device *dev)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++	struct ath_softc *sc = dev->priv;
++#endif
++
++	/*
++	 * XXX Using in_softirq is not right since we might
++	 * be called from other soft irq contexts than
++	 * ath_rx_poll
++	 */
++	if (!in_softirq()) {
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++		napi_disable(&sc->sc_napi);
++#else
++		netif_poll_disable(dev);
++#endif
++	}
++}
++
++static void ath_poll_enable(struct net_device *dev)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++	struct ath_softc *sc = dev->priv;
++#endif
++
++	/* NB: see above */
++	if (!in_softirq()) {
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++		napi_enable(&sc->sc_napi);
++#else
++		netif_poll_enable(dev);
++#endif
++	}
++}
++
++
+ /*
+  * Block/unblock tx+rx processing while a key change is done.
+  * We assume the caller serializes key management operations
+@@ -4119,33 +4195,23 @@
+ ath_key_update_begin(struct ieee80211vap *vap)
+ {
+ 	struct net_device *dev = vap->iv_ic->ic_dev;
+-	struct ath_softc *sc = dev->priv;
+ 
+-	DPRINTF(sc, ATH_DEBUG_KEYCACHE, "Begin\n");
+ 	/*
+ 	 * When called from the rx tasklet we cannot use
+ 	 * tasklet_disable because it will block waiting
+ 	 * for us to complete execution.
+-	 *
+-	 * XXX Using in_softirq is not right since we might
+-	 * be called from other soft irq contexts than
+-	 * ath_rx_tasklet.
+ 	 */
+-	if (!in_softirq())
+-		tasklet_disable(&sc->sc_rxtq);
+-	netif_stop_queue(dev);
++	if ((dev->flags & (IFF_UP|IFF_RUNNING)) == (IFF_UP|IFF_RUNNING))
++		netif_stop_queue(dev);
+ }
+ 
+ static void
+ ath_key_update_end(struct ieee80211vap *vap)
+ {
+ 	struct net_device *dev = vap->iv_ic->ic_dev;
+-	struct ath_softc *sc = dev->priv;
+ 
+-	DPRINTF(sc, ATH_DEBUG_KEYCACHE, "End\n");
+-	netif_wake_queue(dev);
+-	if (!in_softirq())		/* NB: see above */
+-		tasklet_enable(&sc->sc_rxtq);
++	if ((dev->flags & (IFF_UP|IFF_RUNNING)) == (IFF_UP|IFF_RUNNING))
++		netif_wake_queue(dev);
+ }
+ 
+ /*
+@@ -6405,15 +6471,25 @@
+ 	sc->sc_numrxotherant = 0;
+ }
+ 
+-static void
+-ath_rx_tasklet(TQUEUE_ARG data)
++static int
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++ath_rx_poll(struct napi_struct *napi, int budget)
++#else
++ath_rx_poll(struct net_device *dev, int *budget)
++#endif
+ {
+ #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;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++	struct ath_softc *sc = container_of(napi, struct ath_softc, sc_napi);
++	struct net_device *dev = sc->sc_dev;
++	u_int rx_limit = budget;
++#else
+ 	struct ath_softc *sc = dev->priv;
++	u_int rx_limit = min(dev->quota, *budget);
++#endif
++	struct ath_buf *bf;
+ 	struct ieee80211com *ic = &sc->sc_ic;
+ 	struct ath_hal *ah = sc ? sc->sc_ah : NULL;
+ 	struct ath_desc *ds;
+@@ -6421,6 +6497,7 @@
+ 	struct ieee80211_node *ni;
+ 	struct sk_buff *skb = NULL;
+ 	unsigned int len, phyerr, mic_fail = 0;
++	unsigned int early_stop = 0;
+ 	int type = -1; /* undefined */
+ 	int init_ret = 0;
+ 	int bf_processed = 0;
+@@ -6428,6 +6505,7 @@
+ 	int errors	 = 0;
+ 
+ 	DPRINTF(sc, ATH_DEBUG_RX_PROC, "%s started...\n", __func__);
++process_rx_again:
+ 	do {
+ 		/* Get next RX buffer pending processing by RX tasklet...
+ 		 *  
+@@ -6457,6 +6535,10 @@
+ 			break;
+ 
+ 		bf_processed++;
++		if (rx_limit-- < 0) {
++			early_stop = 1;
++			break;
++		}
+ 		ds  = bf->bf_desc;
+ 
+ #ifdef AR_DEBUG
+@@ -6491,6 +6573,7 @@
+ 				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) {
+ 				/* Decrypt error.  If the error occurred
+@@ -6689,6 +6772,33 @@
+ 		STAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list);
+ 		ATH_RXBUF_UNLOCK_IRQ(sc);
+ 	} while (1);
++	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_intr_process_rx_descriptors(sc, NULL, hw_tsf, 0);
++			goto process_rx_again;
++		}
++		sc->sc_imask |= HAL_INT_RX;
++		ath_hal_intrset(ah, sc->sc_imask);
++		local_irq_restore(flags);
++#endif
++	}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++	netif_rx_complete(dev, napi);
++#else
++	netif_rx_complete(dev);
++	*budget -= bf_processed;
++	dev->quota -= bf_processed;
++#endif
+ 
+ 	if (sc->sc_useintmit) 
+ 		ath_hal_rxmonitor(ah, &sc->sc_halstats, &sc->sc_curchan);
+@@ -6701,6 +6811,12 @@
+ 		" %d rx buf processed. %d were errors. %d skb accepted.\n",
+ 		__func__, bf_processed, errors, skb_accepted);
+ #undef PA2DESC
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++	return bf_processed;
++#else
++	return early_stop;
++#endif
+ }
+ 
+ #ifdef ATH_SUPERG_XR
+@@ -8306,12 +8422,24 @@
+ {
+ 	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)
+@@ -8327,7 +8455,9 @@
+ {
+ 	struct net_device *dev = (struct net_device *)data;
+ 	struct ath_softc *sc = dev->priv;
++	unsigned long flags;
+ 
++process_tx_again:
+ 	/*
+ 	 * Process each active queue.
+ 	 */
+@@ -8357,6 +8487,16 @@
+ 	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)
+@@ -10322,9 +10462,9 @@
+ 	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);
++		ath_poll_disable(dev);
+ 		error = ath_reset(dev);
+-		tasklet_enable(&sc->sc_rxtq);
++		ath_poll_enable(dev);
+ 	}
+ 	ATH_UNLOCK(sc);
+ 
+--- a/ath/if_athvar.h
++++ b/ath/if_athvar.h
+@@ -56,6 +56,10 @@
+ # include	<asm/bitops.h>
+ #endif
+ 
++#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.
+@@ -644,6 +648,9 @@
+ struct ath_softc {
+ 	struct ieee80211com sc_ic;		/* NB: must be first */
+ 	struct net_device *sc_dev;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24)
++	struct napi_struct sc_napi;
++#endif
+ 	void __iomem *sc_iobase;		/* address of the device */
+ 	struct semaphore sc_lock;		/* dev-level lock */
+ 	struct net_device_stats	sc_devstats;	/* device statistics */
+@@ -756,7 +763,6 @@
+ 	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_int16_t sc_cachelsz;			/* cache line size */
+ 
+@@ -769,6 +775,7 @@
+ 	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 */
+@@ -888,6 +895,8 @@
+ #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)
+--- a/net80211/ieee80211_skb.c
++++ b/net80211/ieee80211_skb.c
+@@ -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
+@@ -581,8 +581,8 @@
+ 		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__));
++int netif_receive_skb_debug(struct sk_buff *skb, const char *func, int line) {
++	return netif_receive_skb(untrack_skb(skb, 0, __func__, __LINE__));
+ }
+ 
+ struct sk_buff *alloc_skb_debug(unsigned int length, gfp_t gfp_mask,
+@@ -707,7 +707,7 @@
+ }
+ 
+ EXPORT_SYMBOL(vlan_hwaccel_rx_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);
+--- a/net80211/ieee80211_skb.h
++++ b/net80211/ieee80211_skb.h
+@@ -115,7 +115,7 @@
+ 
+ int vlan_hwaccel_rx_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,
+@@ -150,7 +150,7 @@
+ #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
+@@ -167,8 +167,8 @@
+ 	skb_copy_expand_debug(_skb, _newheadroom, _newtailroom, _gfp_mask, __func__, __LINE__)
+ #define vlan_hwaccel_rx(_skb, _grp, _tag) \
+ 	vlan_hwaccel_rx_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) \
+--- a/net80211/ieee80211_input.c
++++ b/net80211/ieee80211_input.c
+@@ -1185,7 +1185,7 @@
+ 			ret = vlan_hwaccel_rx(skb,
+ 					vap->iv_vlgrp, ni->ni_vlan);
+ 		else
+-			ret = netif_rx(skb);
++			ret = netif_receive_skb(skb);
+ 		if (ret == NET_RX_DROP)
+ 			vap->iv_devstats.rx_dropped++;
+ 		if (tni != NULL)
+@@ -2285,7 +2285,7 @@
+ 
+ 		if (SKB_NI(skb1) != NULL)
+ 			ieee80211_unref_node(&SKB_NI(skb1));
+-		if (netif_rx(skb1) == NET_RX_DROP)
++		if (netif_receive_skb(skb1) == NET_RX_DROP)
+ 			vap->iv_devstats.rx_dropped++;
+ 	}
+ }
+--- a/net80211/ieee80211_monitor.c
++++ b/net80211/ieee80211_monitor.c
+@@ -580,7 +580,7 @@
+ 
+ 			if (SKB_NI(skb1) != NULL)
+ 				ieee80211_unref_node(&SKB_NI(skb1));
+-			if (netif_rx(skb1) == NET_RX_DROP)
++			if (netif_receive_skb(skb1) == NET_RX_DROP)
+ 				vap->iv_devstats.rx_dropped++;
+ 			skb1 = NULL;
+ 		}