package/madwifi/patches/300-napi_polling.patch

   1 Index: madwifi-dfs-r3053/ath/if_ath.c
   2 ===================================================================
   3 --- madwifi-dfs-r3053.orig/ath/if_ath.c 2007-12-13 05:25:13.342385808 +0100
   4 +++ madwifi-dfs-r3053/ath/if_ath.c      2007-12-13 05:25:13.662404044 +0100
   5 @@ -189,7 +189,7 @@
   6         struct sk_buff *, int, int, u_int64_t);
   7  static void ath_setdefantenna(struct ath_softc *, u_int);
   8  static struct ath_txq *ath_txq_setup(struct ath_softc *, int, int);
   9 -static void ath_rx_tasklet(TQUEUE_ARG);
  10 +static int ath_rx_poll(struct net_device *dev, int *budget);
  11  static int ath_hardstart(struct sk_buff *, struct net_device *);
  12  static int ath_mgtstart(struct ieee80211com *, struct sk_buff *);
  13  #ifdef ATH_SUPERG_COMP
  14 @@ -535,7 +535,6 @@
  15         ATH_TXBUF_LOCK_INIT(sc);
  16         ATH_RXBUF_LOCK_INIT(sc);
  17
  18 -       ATH_INIT_TQUEUE(&sc->sc_rxtq,     ath_rx_tasklet,       dev);
  19         ATH_INIT_TQUEUE(&sc->sc_txtq,     ath_tx_tasklet,       dev);
  20         ATH_INIT_TQUEUE(&sc->sc_bmisstq,  ath_bmiss_tasklet,    dev);
  21         ATH_INIT_TQUEUE(&sc->sc_bstucktq, ath_bstuck_tasklet,   dev);
  22 @@ -808,6 +807,8 @@
  23         dev->set_mac_address = ath_set_mac_address;
  24         dev->change_mtu = ath_change_mtu;
  25         dev->tx_queue_len = ATH_TXBUF - ATH_TXBUF_MGT_RESERVED;
  26 +       dev->poll = ath_rx_poll;
  27 +       dev->weight = 64;
  28  #ifdef USE_HEADERLEN_RESV
  29         dev->hard_header_len += sizeof(struct ieee80211_qosframe) +
  30                                 sizeof(struct llc) +
  31 @@ -2150,6 +2151,7 @@
  32                 (status & HAL_INT_RXPHY)   ? " HAL_INT_RXPHY"   : "",
  33                 (status & HAL_INT_SWBA)    ? " HAL_INT_SWBA"    : "");
  34
  35 +       sc->sc_isr = status;
  36         status &= sc->sc_imask;                 /* discard unasked for bits */
  37         if (status & HAL_INT_FATAL) {
  38                 sc->sc_stats.ast_hardware++;
  39 @@ -2201,7 +2203,14 @@
  40                 }
  41                 if (status & (HAL_INT_RX | HAL_INT_RXPHY)) {
  42                         ath_uapsd_processtriggers(sc);
  43 -                       ATH_SCHEDULE_TQUEUE(&sc->sc_rxtq, &needmark);
  44 +                       sc->sc_isr &= ~HAL_INT_RX;
  45 +                       if (netif_rx_schedule_prep(dev)) {
  46 +#ifndef ATH_PRECISE_TSF
  47 +                               sc->sc_imask &= ~HAL_INT_RX;
  48 +                               ath_hal_intrset(ah, sc->sc_imask);
  49 +#endif
  50 +                               __netif_rx_schedule(dev);
  51 +                       }
  52                 }
  53                 if (status & HAL_INT_TX) {
  54  #ifdef ATH_SUPERG_DYNTURBO
  55 @@ -2227,6 +2236,11 @@
  56                                 }
  57                         }
  58  #endif
  59 +                       /* disable transmit interrupt */
  60 +                       sc->sc_isr &= ~HAL_INT_TX;
  61 +                       ath_hal_intrset(ah, sc->sc_imask & ~HAL_INT_TX);
  62 +                       sc->sc_imask &= ~HAL_INT_TX;
  63 +
  64                         ATH_SCHEDULE_TQUEUE(&sc->sc_txtq, &needmark);
  65                 }
  66                 if (status & HAL_INT_BMISS) {
  67 @@ -3904,10 +3918,10 @@
  68          *
  69          * XXX Using in_softirq is not right since we might
  70          * be called from other soft irq contexts than
  71 -        * ath_rx_tasklet.
  72 +        * ath_rx_poll
  73          */
  74         if (!in_softirq())
  75 -               tasklet_disable(&sc->sc_rxtq);
  76 +               netif_poll_disable(dev);
  77         netif_stop_queue(dev);
  78  }
  79
  80 @@ -3920,7 +3934,7 @@
  81         DPRINTF(sc, ATH_DEBUG_KEYCACHE, "%s:\n", __func__);
  82         netif_start_queue(dev);
  83         if (!in_softirq())              /* NB: see above */
  84 -               tasklet_enable(&sc->sc_rxtq);
  85 +               netif_poll_enable(dev);
  86  }
  87
  88  /*
  89 @@ -6287,13 +6301,12 @@
  90         sc->sc_rxotherant = 0;
  91  }
  92
  93 -static void
  94 -ath_rx_tasklet(TQUEUE_ARG data)
  95 +static int
  96 +ath_rx_poll(struct net_device *dev, int *budget)
  97  {
  98  #define        PA2DESC(_sc, _pa) \
  99         ((struct ath_desc *)((caddr_t)(_sc)->sc_rxdma.dd_desc + \
 100                 ((_pa) - (_sc)->sc_rxdma.dd_desc_paddr)))
 101 -       struct net_device *dev = (struct net_device *)data;
 102         struct ath_buf *bf;
 103         struct ath_softc *sc = dev->priv;
 104         struct ieee80211com *ic = &sc->sc_ic;
 105 @@ -6305,8 +6318,11 @@
 106         unsigned int len;
 107         int type;
 108         u_int phyerr;
 109 +       u_int processed = 0, early_stop = 0;
 110 +       u_int rx_limit = dev->quota;
 111
 112         DPRINTF(sc, ATH_DEBUG_RX_PROC, "%s\n", __func__);
 113 +process_rx_again:
 114         do {
 115                 bf = STAILQ_FIRST(&sc->sc_rxbuf);
 116                 if (bf == NULL) {               /* XXX ??? can this happen */
 117 @@ -6330,6 +6346,13 @@
 118                         /* NB: never process the self-linked entry at the end */
 119                         break;
 120                 }
 121 +
 122 +               processed++;
 123 +               if (rx_limit-- < 0) {
 124 +                       early_stop = 1;
 125 +                       break;
 126 +               }
 127 +
 128                 skb = bf->bf_skb;
 129                 if (skb == NULL) {
 130                         printk("%s: no skbuff (%s)\n", DEV_NAME(dev), __func__);
 131 @@ -6374,6 +6397,7 @@
 132                                 sc->sc_stats.ast_rx_phyerr++;
 133                                 phyerr = rs->rs_phyerr & 0x1f;
 134                                 sc->sc_stats.ast_rx_phy[phyerr]++;
 135 +                               goto rx_next;
 136                         }
 137                         if (rs->rs_status & HAL_RXERR_DECRYPT) {
 138                                 /*
 139 @@ -6571,9 +6595,33 @@
 140                 STAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list);
 141                 ATH_RXBUF_UNLOCK_IRQ(sc);
 142         } while (ath_rxbuf_init(sc, bf) == 0);
 143 +       if (!early_stop) {
 144 +               /* Check if more data is received while we were
 145 +                * processing the descriptor chain.
 146 +                */
 147 +#ifndef ATH_PRECISE_TSF
 148 +               ATH_DISABLE_INTR();
 149 +               if (sc->sc_isr & HAL_INT_RX) {
 150 +                       sc->sc_isr &= ~HAL_INT_RX;
 151 +                       ATH_ENABLE_INTR();
 152 +                       ath_uapsd_processtriggers(sc);
 153 +                       goto process_rx_again;
 154 +               }
 155 +#endif
 156 +               netif_rx_complete(dev);
 157 +
 158 +#ifndef ATH_PRECISE_TSF
 159 +               sc->sc_imask |= HAL_INT_RX;
 160 +               ath_hal_intrset(ah, sc->sc_imask);
 161 +               ATH_ENABLE_INTR();
 162 +#endif
 163 +       }
 164 +
 165 +       *budget -= processed;
 166
 167         /* rx signal state monitoring */
 168         ath_hal_rxmonitor(ah, &sc->sc_halstats, &sc->sc_curchan);
 169 +       return early_stop;
 170  #undef PA2DESC
 171  }
 172
 173 @@ -8192,11 +8240,22 @@
 174         struct net_device *dev = (struct net_device *)data;
 175         struct ath_softc *sc = dev->priv;
 176
 177 +process_tx_again:
 178         if (txqactive(sc->sc_ah, 0))
 179                 ath_tx_processq(sc, &sc->sc_txq[0]);
 180         if (txqactive(sc->sc_ah, sc->sc_cabq->axq_qnum))
 181                 ath_tx_processq(sc, sc->sc_cabq);
 182
 183 +       ATH_DISABLE_INTR();
 184 +       if (sc->sc_isr & HAL_INT_TX) {
 185 +               sc->sc_isr &= ~HAL_INT_TX;
 186 +               ATH_ENABLE_INTR();
 187 +               goto process_tx_again;
 188 +       }
 189 +       sc->sc_imask |= HAL_INT_TX;
 190 +       ath_hal_intrset(sc->sc_ah, sc->sc_imask);
 191 +       ATH_ENABLE_INTR();
 192 +
 193         netif_wake_queue(dev);
 194
 195         if (sc->sc_softled)
 196 @@ -8213,6 +8272,7 @@
 197         struct net_device *dev = (struct net_device *)data;
 198         struct ath_softc *sc = dev->priv;
 199
 200 +process_tx_again:
 201         /*
 202          * Process each active queue.
 203          */
 204 @@ -8233,6 +8293,16 @@
 205         if (sc->sc_uapsdq && txqactive(sc->sc_ah, sc->sc_uapsdq->axq_qnum))
 206                 ath_tx_processq(sc, sc->sc_uapsdq);
 207
 208 +       ATH_DISABLE_INTR();
 209 +       if (sc->sc_isr & HAL_INT_TX) {
 210 +               sc->sc_isr &= ~HAL_INT_TX;
 211 +               ATH_ENABLE_INTR();
 212 +               goto process_tx_again;
 213 +       }
 214 +       sc->sc_imask |= HAL_INT_TX;
 215 +       ath_hal_intrset(sc->sc_ah, sc->sc_imask);
 216 +       ATH_ENABLE_INTR();
 217 +
 218         netif_wake_queue(dev);
 219
 220         if (sc->sc_softled)
 221 @@ -8250,6 +8320,7 @@
 222         unsigned int i;
 223
 224         /* Process each active queue. */
 225 +process_tx_again:
 226         for (i = 0; i < HAL_NUM_TX_QUEUES; i++)
 227                 if (ATH_TXQ_SETUP(sc, i) && txqactive(sc->sc_ah, i))
 228                         ath_tx_processq(sc, &sc->sc_txq[i]);
 229 @@ -8258,6 +8329,16 @@
 230                 ath_tx_processq(sc, sc->sc_xrtxq);
 231  #endif
 232
 233 +       ATH_DISABLE_INTR();
 234 +       if (sc->sc_isr & HAL_INT_TX) {
 235 +               sc->sc_isr &= ~HAL_INT_TX;
 236 +               ATH_ENABLE_INTR();
 237 +               goto process_tx_again;
 238 +       }
 239 +       sc->sc_imask |= HAL_INT_TX;
 240 +       ath_hal_intrset(sc->sc_ah, sc->sc_imask);
 241 +       ATH_ENABLE_INTR();
 242 +
 243         netif_wake_queue(dev);
 244
 245         if (sc->sc_softled)
 246 @@ -8332,6 +8413,7 @@
 247  ath_draintxq(struct ath_softc *sc)
 248  {
 249         struct ath_hal *ah = sc->sc_ah;
 250 +       int npend = 0;
 251         unsigned int i;
 252
 253         /* XXX return value */
 254 @@ -10095,9 +10177,9 @@
 255         dev->mtu = mtu;
 256         if ((dev->flags & IFF_RUNNING) && !sc->sc_invalid) {
 257                 /* NB: the rx buffers may need to be reallocated */
 258 -               tasklet_disable(&sc->sc_rxtq);
 259 +               netif_poll_disable(dev);
 260                 error = ath_reset(dev);
 261 -               tasklet_enable(&sc->sc_rxtq);
 262 +               netif_poll_enable(dev);
 263         }
 264         ATH_UNLOCK(sc);
 265
 266 Index: madwifi-dfs-r3053/ath/if_athvar.h
 267 ===================================================================
 268 --- madwifi-dfs-r3053.orig/ath/if_athvar.h      2007-12-13 05:25:12.842357313 +0100
 269 +++ madwifi-dfs-r3053/ath/if_athvar.h   2007-12-13 05:25:13.666404270 +0100
 270 @@ -50,6 +50,10 @@
 271  #include <asm/io.h>
 272  #include <linux/list.h>
 273
 274 +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
 275 +#define irqs_disabled()                        0
 276 +#endif
 277 +
 278  /*
 279   * Deduce if tasklets are available.  If not then
 280   * fall back to using the immediate work queue.
 281 @@ -728,7 +732,6 @@
 282         struct ath_buf *sc_rxbufcur;            /* current rx buffer */
 283         u_int32_t *sc_rxlink;                   /* link ptr in last RX desc */
 284         spinlock_t sc_rxbuflock;
 285 -       struct ATH_TQ_STRUCT sc_rxtq;           /* rx intr tasklet */
 286         struct ATH_TQ_STRUCT sc_rxorntq;        /* rxorn intr tasklet */
 287         u_int8_t sc_defant;                     /* current default antenna */
 288         u_int8_t sc_rxotherant;                 /* RXs on non-default antenna */
 289 @@ -741,6 +744,7 @@
 290         u_int sc_txintrperiod;                  /* tx interrupt batching */
 291         struct ath_txq sc_txq[HAL_NUM_TX_QUEUES];
 292         struct ath_txq *sc_ac2q[WME_NUM_AC];    /* WME AC -> h/w qnum */
 293 +       HAL_INT sc_isr;                         /* unmasked ISR state */
 294         struct ATH_TQ_STRUCT sc_txtq;           /* tx intr tasklet */
 295         u_int8_t sc_grppoll_str[GRPPOLL_RATE_STR_LEN];
 296         struct ath_descdma sc_bdma;             /* beacon descriptors */
 297 @@ -853,6 +857,8 @@
 298  #define        ATH_TXBUF_LOCK_CHECK(_sc)
 299  #endif
 300
 301 +#define ATH_DISABLE_INTR               local_irq_disable
 302 +#define ATH_ENABLE_INTR                local_irq_enable
 303
 304  #define        ATH_RXBUF_LOCK_INIT(_sc)        spin_lock_init(&(_sc)->sc_rxbuflock)
 305  #define        ATH_RXBUF_LOCK_DESTROY(_sc)
 306 Index: madwifi-dfs-r3053/net80211/ieee80211_input.c
 307 ===================================================================
 308 --- madwifi-dfs-r3053.orig/net80211/ieee80211_input.c   2007-12-13 05:25:10.374216660 +0100
 309 +++ madwifi-dfs-r3053/net80211/ieee80211_input.c        2007-12-13 05:25:13.674404726 +0100
 310 @@ -1178,7 +1178,7 @@
 311                         /* attach vlan tag */
 312                         struct ieee80211_node *ni_tmp = SKB_CB(skb)->ni;
 313                         if (vlan_hwaccel_receive_skb(skb, vap->iv_vlgrp, ni->ni_vlan) == NET_RX_DROP) {
 314 -                               /* If netif_rx dropped the packet because
 315 +                               /* If netif_receive_skb dropped the packet because
 316                                  * device was too busy */
 317                                 if (ni_tmp != NULL) {
 318                                         /* node reference was leaked */
 319 @@ -1189,8 +1189,8 @@
 320                         skb = NULL; /* SKB is no longer ours */
 321                 } else {
 322                         struct ieee80211_node *ni_tmp = SKB_CB(skb)->ni;
 323 -                       if (netif_rx(skb) == NET_RX_DROP) {
 324 -                               /* If netif_rx dropped the packet because
 325 +                       if (netif_receive_skb(skb) == NET_RX_DROP) {
 326 +                               /* If netif_receive_skb dropped the packet because
 327                                  * device was too busy */
 328                                 if (ni_tmp != NULL) {
 329                                         /* node reference was leaked */
 330 @@ -2299,8 +2299,8 @@
 331                 skb1->protocol = __constant_htons(0x0019);  /* ETH_P_80211_RAW */
 332
 333                 ni_tmp = SKB_CB(skb1)->ni;
 334 -               if (netif_rx(skb1) == NET_RX_DROP) {
 335 -                       /* If netif_rx dropped the packet because
 336 +               if (netif_receive_skb(skb1) == NET_RX_DROP) {
 337 +                       /* If netif_receive_skb dropped the packet because
 338                          * device was too busy */
 339                         if (ni_tmp != NULL) {
 340                                 /* node reference was leaked */
 341 Index: madwifi-dfs-r3053/net80211/ieee80211_monitor.c
 342 ===================================================================
 343 --- madwifi-dfs-r3053.orig/net80211/ieee80211_monitor.c 2007-12-13 05:25:10.386217344 +0100
 344 +++ madwifi-dfs-r3053/net80211/ieee80211_monitor.c      2007-12-13 05:25:13.678404955 +0100
 345 @@ -577,7 +577,7 @@
 346                         skb1->protocol = __constant_htons(0x0019); /* ETH_P_80211_RAW */
 347
 348                         ni_tmp = SKB_CB(skb1)->ni;
 349 -                       if (netif_rx(skb1) == NET_RX_DROP) {
 350 +                       if (netif_receive_skb(skb1) == NET_RX_DROP) {
 351                                 /* If netif_rx dropped the packet because
 352                                  * device was too busy */
 353                                 if (ni_tmp != NULL) {