package/madwifi/patches/300-napi_polling.patch

   1 Index: madwifi-trunk-r3280/ath/if_ath.c
   2 ===================================================================
   3 --- madwifi-trunk-r3280.orig/ath/if_ath.c       2008-01-28 17:29:22.989895792 +0100
   4 +++ madwifi-trunk-r3280/ath/if_ath.c    2008-01-28 20:00:09.319637124 +0100
   5 @@ -184,7 +184,7 @@
   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 @@ -542,7 +542,6 @@
  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 @@ -816,6 +815,8 @@
  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 @@ -2206,6 +2207,7 @@
  32                 (status & HAL_INT_GLOBAL)       ? " HAL_INT_GLOBAL"     : ""
  33                 );
  34
  35 +       sc->sc_isr = status;
  36         status &= sc->sc_imask;                 /* discard unasked for bits */
  37         /* As soon as we know we have a real interrupt we intend to service,
  38          * we will check to see if we need an initial hardware TSF reading.
  39 @@ -2263,7 +2265,14 @@
  40                 }
  41                 if (status & (HAL_INT_RX | HAL_INT_RXPHY)) {
  42                         ath_uapsd_processtriggers(sc, hw_tsf);
  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 @@ -2289,6 +2298,11 @@
  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 @@ -4011,10 +4025,10 @@
  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 @@ -4027,7 +4041,7 @@
  81         DPRINTF(sc, ATH_DEBUG_KEYCACHE, "End\n");
  82         netif_wake_queue(dev);
  83         if (!in_softirq())              /* NB: see above */
  84 -               tasklet_enable(&sc->sc_rxtq);
  85 +               netif_poll_enable(dev);
  86  }
  87
  88  /*
  89 @@ -6329,13 +6343,12 @@
  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 @@ -6347,8 +6360,11 @@
 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, "invoked\n");
 113 +process_rx_again:
 114         do {
 115                 bf = STAILQ_FIRST(&sc->sc_rxbuf);
 116                 if (bf == NULL) {               /* XXX ??? can this happen */
 117 @@ -6372,6 +6388,13 @@
 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                         EPRINTF(sc, "Dropping; buffer contains NULL skbuff.\n");
 131 @@ -6419,6 +6442,7 @@
 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 @@ -6614,9 +6638,35 @@
 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 +               unsigned long flags;
 145 +               /* Check if more data is received while we were
 146 +                * processing the descriptor chain.
 147 +                */
 148 +#ifndef ATH_PRECISE_TSF
 149 +               local_irq_save(flags);
 150 +               if (sc->sc_isr & HAL_INT_RX) {
 151 +                       u_int64_t hw_tsf = ath_hal_gettsf64(ah);
 152 +                       sc->sc_isr &= ~HAL_INT_RX;
 153 +                       local_irq_restore(flags);
 154 +                       ath_uapsd_processtriggers(sc, hw_tsf);
 155 +                       goto process_rx_again;
 156 +               }
 157 +#endif
 158 +               netif_rx_complete(dev);
 159 +
 160 +#ifndef ATH_PRECISE_TSF
 161 +               sc->sc_imask |= HAL_INT_RX;
 162 +               ath_hal_intrset(ah, sc->sc_imask);
 163 +               local_irq_restore(flags);
 164 +#endif
 165 +       }
 166 +
 167 +       *budget -= processed;
 168
 169         /* rx signal state monitoring */
 170         ath_hal_rxmonitor(ah, &sc->sc_halstats, &sc->sc_curchan);
 171 +       return early_stop;
 172  #undef PA2DESC
 173  }
 174
 175 @@ -8267,12 +8317,24 @@
 176  {
 177         struct net_device *dev = (struct net_device *)data;
 178         struct ath_softc *sc = dev->priv;
 179 +       unsigned long flags;
 180
 181 +process_tx_again:
 182         if (txqactive(sc->sc_ah, 0))
 183                 ath_tx_processq(sc, &sc->sc_txq[0]);
 184         if (txqactive(sc->sc_ah, sc->sc_cabq->axq_qnum))
 185                 ath_tx_processq(sc, sc->sc_cabq);
 186
 187 +       local_irq_save(flags);
 188 +       if (sc->sc_isr & HAL_INT_TX) {
 189 +               sc->sc_isr &= ~HAL_INT_TX;
 190 +               local_irq_restore(flags);
 191 +               goto process_tx_again;
 192 +       }
 193 +       sc->sc_imask |= HAL_INT_TX;
 194 +       ath_hal_intrset(sc->sc_ah, sc->sc_imask);
 195 +       local_irq_restore(flags);
 196 +
 197         netif_wake_queue(dev);
 198
 199         if (sc->sc_softled)
 200 @@ -8288,7 +8350,9 @@
 201  {
 202         struct net_device *dev = (struct net_device *)data;
 203         struct ath_softc *sc = dev->priv;
 204 +       unsigned long flags;
 205
 206 +process_tx_again:
 207         /*
 208          * Process each active queue.
 209          */
 210 @@ -8309,6 +8373,16 @@
 211         if (sc->sc_uapsdq && txqactive(sc->sc_ah, sc->sc_uapsdq->axq_qnum))
 212                 ath_tx_processq(sc, sc->sc_uapsdq);
 213
 214 +       local_irq_save(flags);
 215 +       if (sc->sc_isr & HAL_INT_TX) {
 216 +               sc->sc_isr &= ~HAL_INT_TX;
 217 +               local_irq_restore(flags);
 218 +               goto process_tx_again;
 219 +       }
 220 +       sc->sc_imask |= HAL_INT_TX;
 221 +       ath_hal_intrset(sc->sc_ah, sc->sc_imask);
 222 +       local_irq_restore(flags);
 223 +
 224         netif_wake_queue(dev);
 225
 226         if (sc->sc_softled)
 227 @@ -8324,13 +8398,25 @@
 228         struct net_device *dev = (struct net_device *)data;
 229         struct ath_softc *sc = dev->priv;
 230         unsigned int i;
 231 +       unsigned long flags;
 232
 233         /* Process each active queue. This includes sc_cabq, sc_xrtq and
 234          * sc_uapsdq */
 235 +process_tx_again:
 236         for (i = 0; i < HAL_NUM_TX_QUEUES; i++)
 237                 if (ATH_TXQ_SETUP(sc, i) && txqactive(sc->sc_ah, i))
 238                         ath_tx_processq(sc, &sc->sc_txq[i]);
 239
 240 +       local_irq_save(flags);
 241 +       if (sc->sc_isr & HAL_INT_TX) {
 242 +               sc->sc_isr &= ~HAL_INT_TX;
 243 +               local_irq_restore(flags);
 244 +               goto process_tx_again;
 245 +       }
 246 +       sc->sc_imask |= HAL_INT_TX;
 247 +       ath_hal_intrset(sc->sc_ah, sc->sc_imask);
 248 +       local_irq_restore(flags);
 249 +
 250         netif_wake_queue(dev);
 251
 252         if (sc->sc_softled)
 253 @@ -8405,6 +8491,7 @@
 254  ath_draintxq(struct ath_softc *sc)
 255  {
 256         struct ath_hal *ah = sc->sc_ah;
 257 +       int npend = 0;
 258         unsigned int i;
 259
 260         /* XXX return value */
 261 @@ -10261,9 +10348,9 @@
 262         dev->mtu = mtu;
 263         if ((dev->flags & IFF_RUNNING) && !sc->sc_invalid) {
 264                 /* NB: the rx buffers may need to be reallocated */
 265 -               tasklet_disable(&sc->sc_rxtq);
 266 +               netif_poll_disable(dev);
 267                 error = ath_reset(dev);
 268 -               tasklet_enable(&sc->sc_rxtq);
 269 +               netif_poll_enable(dev);
 270         }
 271         ATH_UNLOCK(sc);
 272
 273 Index: madwifi-trunk-r3280/ath/if_athvar.h
 274 ===================================================================
 275 --- madwifi-trunk-r3280.orig/ath/if_athvar.h    2008-01-28 17:29:22.997896245 +0100
 276 +++ madwifi-trunk-r3280/ath/if_athvar.h 2008-01-28 17:45:06.903383316 +0100
 277 @@ -50,6 +50,10 @@
 278  #include <asm/io.h>
 279  #include <linux/list.h>
 280
 281 +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
 282 +#define irqs_disabled()                        0
 283 +#endif
 284 +
 285  /*
 286   * Deduce if tasklets are available.  If not then
 287   * fall back to using the immediate work queue.
 288 @@ -728,7 +732,6 @@
 289         struct ath_buf *sc_rxbufcur;            /* current rx buffer */
 290         u_int32_t *sc_rxlink;                   /* link ptr in last RX desc */
 291         spinlock_t sc_rxbuflock;
 292 -       struct ATH_TQ_STRUCT sc_rxtq;           /* rx intr tasklet */
 293         struct ATH_TQ_STRUCT sc_rxorntq;        /* rxorn intr tasklet */
 294         u_int8_t sc_defant;                     /* current default antenna */
 295         u_int8_t sc_rxotherant;                 /* RXs on non-default antenna */
 296 @@ -741,6 +744,7 @@
 297         u_int sc_txintrperiod;                  /* tx interrupt batching */
 298         struct ath_txq sc_txq[HAL_NUM_TX_QUEUES];
 299         struct ath_txq *sc_ac2q[WME_NUM_AC];    /* WME AC -> h/w qnum */
 300 +       HAL_INT sc_isr;                         /* unmasked ISR state */
 301         struct ATH_TQ_STRUCT sc_txtq;           /* tx intr tasklet */
 302         u_int8_t sc_grppoll_str[GRPPOLL_RATE_STR_LEN];
 303         struct ath_descdma sc_bdma;             /* beacon descriptors */
 304 @@ -854,6 +858,8 @@
 305  #define        ATH_TXBUF_LOCK_CHECK(_sc)
 306  #endif
 307
 308 +#define ATH_DISABLE_INTR               local_irq_disable
 309 +#define ATH_ENABLE_INTR                local_irq_enable
 310
 311  #define        ATH_RXBUF_LOCK_INIT(_sc)        spin_lock_init(&(_sc)->sc_rxbuflock)
 312  #define        ATH_RXBUF_LOCK_DESTROY(_sc)
 313 Index: madwifi-trunk-r3280/net80211/ieee80211_input.c
 314 ===================================================================
 315 --- madwifi-trunk-r3280.orig/net80211/ieee80211_input.c 2008-01-28 17:29:23.005896702 +0100
 316 +++ madwifi-trunk-r3280/net80211/ieee80211_input.c      2008-01-28 19:52:50.586635164 +0100
 317 @@ -1197,7 +1197,7 @@
 318                         /* attach vlan tag */
 319                         struct ieee80211_node *ni_tmp = SKB_CB(skb)->ni;
 320                         if (vlan_hwaccel_receive_skb(skb, vap->iv_vlgrp, ni->ni_vlan) == NET_RX_DROP) {
 321 -                               /* If netif_rx dropped the packet because
 322 +                               /* If netif_receive_skb dropped the packet because
 323                                  * device was too busy */
 324                                 if (ni_tmp != NULL) {
 325                                         /* node reference was leaked */
 326 @@ -1208,8 +1208,8 @@
 327                         skb = NULL; /* SKB is no longer ours */
 328                 } else {
 329                         struct ieee80211_node *ni_tmp = SKB_CB(skb)->ni;
 330 -                       if (netif_rx(skb) == NET_RX_DROP) {
 331 -                               /* If netif_rx dropped the packet because
 332 +                       if (netif_receive_skb(skb) == NET_RX_DROP) {
 333 +                               /* If netif_receive_skb dropped the packet because
 334                                  * device was too busy */
 335                                 if (ni_tmp != NULL) {
 336                                         /* node reference was leaked */
 337 @@ -2314,8 +2314,8 @@
 338                 skb1->protocol = __constant_htons(0x0019);  /* ETH_P_80211_RAW */
 339
 340                 ni_tmp = SKB_CB(skb1)->ni;
 341 -               if (netif_rx(skb1) == NET_RX_DROP) {
 342 -                       /* If netif_rx dropped the packet because
 343 +               if (netif_receive_skb(skb1) == NET_RX_DROP) {
 344 +                       /* If netif_receive_skb dropped the packet because
 345                          * device was too busy */
 346                         if (ni_tmp != NULL) {
 347                                 /* node reference was leaked */
 348 Index: madwifi-trunk-r3280/net80211/ieee80211_monitor.c
 349 ===================================================================
 350 --- madwifi-trunk-r3280.orig/net80211/ieee80211_monitor.c       2008-01-28 17:29:23.013897159 +0100
 351 +++ madwifi-trunk-r3280/net80211/ieee80211_monitor.c    2008-01-28 17:29:26.430091834 +0100
 352 @@ -584,8 +584,8 @@
 353                         skb1->protocol =
 354                                 __constant_htons(0x0019); /* ETH_P_80211_RAW */
 355
 356 -                       if (netif_rx(skb1) == NET_RX_DROP) {
 357 -                               /* If netif_rx dropped the packet because
 358 +                       if (netif_receive_skb(skb1) == NET_RX_DROP) {
 359 +                               /* If netif_receive_skb dropped the packet because
 360                                  * device was too busy, reclaim the ref. in
 361                                  * the skb. */
 362                                 if (SKB_CB(skb1)->ni != NULL)
 363 Index: madwifi-trunk-r3280/net80211/ieee80211_skb.c
 364 ===================================================================
 365 --- madwifi-trunk-r3280.orig/net80211/ieee80211_skb.c   2008-01-28 17:29:23.017897384 +0100
 366 +++ madwifi-trunk-r3280/net80211/ieee80211_skb.c        2008-01-28 17:29:26.446092748 +0100
 367 @@ -73,7 +73,7 @@
 368  #undef dev_queue_xmit
 369  #undef kfree_skb
 370  #undef kfree_skb_fast
 371 -#undef netif_rx
 372 +#undef netif_receive_skb
 373  #undef pskb_copy
 374  #undef skb_clone
 375  #undef skb_copy
 376 @@ -638,8 +638,8 @@
 377                 grp, vlan_tag);
 378  }
 379
 380 -int netif_rx_debug(struct sk_buff *skb, const char* func, int line) {
 381 -       return netif_rx(untrack_skb(skb, 0, func, line, __func__, __LINE__));
 382 +int netif_receive_skb_debug(struct sk_buff *skb, const char* func, int line) {
 383 +       return netif_receive_skb(untrack_skb(skb, 0, func, line, __func__, __LINE__));
 384  }
 385
 386  struct sk_buff * alloc_skb_debug(unsigned int length, gfp_t gfp_mask,
 387 @@ -760,7 +760,7 @@
 388  }
 389
 390  EXPORT_SYMBOL(vlan_hwaccel_receive_skb_debug);
 391 -EXPORT_SYMBOL(netif_rx_debug);
 392 +EXPORT_SYMBOL(netif_receive_skb_debug);
 393  EXPORT_SYMBOL(alloc_skb_debug);
 394  EXPORT_SYMBOL(dev_alloc_skb_debug);
 395  EXPORT_SYMBOL(skb_clone_debug);
 396 Index: madwifi-trunk-r3280/net80211/ieee80211_skb.h
 397 ===================================================================
 398 --- madwifi-trunk-r3280.orig/net80211/ieee80211_skb.h   2008-01-28 17:29:23.029898072 +0100
 399 +++ madwifi-trunk-r3280/net80211/ieee80211_skb.h        2008-01-28 17:29:26.458093432 +0100
 400 @@ -116,7 +116,7 @@
 401  int  vlan_hwaccel_receive_skb_debug(struct sk_buff *skb,
 402                                     struct vlan_group *grp, unsigned short vlan_tag,
 403                                     const char* func, int line);
 404 -int netif_rx_debug(struct sk_buff *skb, const char* func, int line);
 405 +int netif_receive_skb_debug(struct sk_buff *skb, const char* func, int line);
 406  struct sk_buff * alloc_skb_debug(unsigned int length, gfp_t gfp_mask,
 407                                  const char *func, int line);
 408  struct sk_buff * dev_alloc_skb_debug(unsigned int length,
 409 @@ -151,7 +151,7 @@
 410  #undef dev_queue_xmit
 411  #undef kfree_skb
 412  #undef kfree_skb_fast
 413 -#undef netif_rx
 414 +#undef netif_receive_skb
 415  #undef pskb_copy
 416  #undef skb_clone
 417  #undef skb_copy
 418 @@ -168,8 +168,8 @@
 419         skb_copy_expand_debug(_skb, _newheadroom, _newtailroom, _gfp_mask, __func__, __LINE__)
 420  #define vlan_hwaccel_receive_skb(_skb, _grp, _tag) \
 421         vlan_hwaccel_receive_skb_debug(_skb, _grp, _tag, __func__, __LINE__)
 422 -#define netif_rx(_skb) \
 423 -       netif_rx_debug(_skb, __func__, __LINE__)
 424 +#define netif_receive_skb(_skb) \
 425 +       netif_receive_skb_debug(_skb, __func__, __LINE__)
 426  #define        alloc_skb(_length, _gfp_mask) \
 427         alloc_skb_debug(_length, _gfp_mask, __func__, __LINE__)
 428  #define        dev_alloc_skb(_length) \