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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 | /* drivers/net/tulip/interrupt.c Copyright 2000,2001 The Linux Kernel Team Written/copyright 1994-2001 by Donald Becker. This software may be used and distributed according to the terms of the GNU General Public License, incorporated herein by reference. Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html} for more information on this driver. Please submit bugs to http://bugzilla.kernel.org/ . */ #include <linux/pci.h> #include "tulip.h" #include <linux/etherdevice.h> int tulip_rx_copybreak; unsigned int tulip_max_interrupt_work; #ifdef CONFIG_TULIP_NAPI_HW_MITIGATION #define MIT_SIZE 15 #define MIT_TABLE 15 /* We use 0 or max */ static unsigned int mit_table[MIT_SIZE+1] = { /* CRS11 21143 hardware Mitigation Control Interrupt We use only RX mitigation we other techniques for TX intr. mitigation. 31 Cycle Size (timer control) 30:27 TX timer in 16 * Cycle size 26:24 TX No pkts before Int. 23:20 RX timer in Cycle size 19:17 RX No pkts before Int. 16 Continues Mode (CM) */ 0x0, /* IM disabled */ 0x80150000, /* RX time = 1, RX pkts = 2, CM = 1 */ 0x80150000, 0x80270000, 0x80370000, 0x80490000, 0x80590000, 0x80690000, 0x807B0000, 0x808B0000, 0x809D0000, 0x80AD0000, 0x80BD0000, 0x80CF0000, 0x80DF0000, // 0x80FF0000 /* RX time = 16, RX pkts = 7, CM = 1 */ 0x80F10000 /* RX time = 16, RX pkts = 0, CM = 1 */ }; #endif int tulip_refill_rx(struct net_device *dev) { struct tulip_private *tp = netdev_priv(dev); int entry; int refilled = 0; /* Refill the Rx ring buffers. */ for (; tp->cur_rx - tp->dirty_rx > 0; tp->dirty_rx++) { entry = tp->dirty_rx % RX_RING_SIZE; if (tp->rx_buffers[entry].skb == NULL) { struct sk_buff *skb; dma_addr_t mapping; skb = tp->rx_buffers[entry].skb = dev_alloc_skb(PKT_BUF_SZ); if (skb == NULL) break; mapping = pci_map_single(tp->pdev, skb->data, PKT_BUF_SZ, PCI_DMA_FROMDEVICE); tp->rx_buffers[entry].mapping = mapping; skb->dev = dev; /* Mark as being used by this device. */ tp->rx_ring[entry].buffer1 = cpu_to_le32(mapping); refilled++; } tp->rx_ring[entry].status = cpu_to_le32(DescOwned); } if(tp->chip_id == LC82C168) { if(((ioread32(tp->base_addr + CSR5)>>17)&0x07) == 4) { /* Rx stopped due to out of buffers, * restart it */ iowrite32(0x01, tp->base_addr + CSR2); } } return refilled; } #ifdef CONFIG_TULIP_NAPI void oom_timer(unsigned long data) { struct net_device *dev = (struct net_device *)data; struct tulip_private *tp = netdev_priv(dev); napi_schedule(&tp->napi); } int tulip_poll(struct napi_struct *napi, int budget) { struct tulip_private *tp = container_of(napi, struct tulip_private, napi); struct net_device *dev = tp->dev; int entry = tp->cur_rx % RX_RING_SIZE; int work_done = 0; #ifdef CONFIG_TULIP_NAPI_HW_MITIGATION int received = 0; #endif #ifdef CONFIG_TULIP_NAPI_HW_MITIGATION /* that one buffer is needed for mit activation; or might be a bug in the ring buffer code; check later -- JHS*/ if (budget >=RX_RING_SIZE) budget--; #endif if (tulip_debug > 4) printk(KERN_DEBUG " In tulip_rx(), entry %d %8.8x.\n", entry, tp->rx_ring[entry].status); do { if (ioread32(tp->base_addr + CSR5) == 0xffffffff) { printk(KERN_DEBUG " In tulip_poll(), hardware disappeared.\n"); break; } /* Acknowledge current RX interrupt sources. */ iowrite32((RxIntr | RxNoBuf), tp->base_addr + CSR5); /* If we own the next entry, it is a new packet. Send it up. */ while ( ! (tp->rx_ring[entry].status & cpu_to_le32(DescOwned))) { s32 status = le32_to_cpu(tp->rx_ring[entry].status); short pkt_len; if (tp->dirty_rx + RX_RING_SIZE == tp->cur_rx) break; if (tulip_debug > 5) printk(KERN_DEBUG "%s: In tulip_rx(), entry %d %8.8x.\n", dev->name, entry, status); if (++work_done >= budget) goto not_done; /* * Omit the four octet CRC from the length. * (May not be considered valid until we have * checked status for RxLengthOver2047 bits) */ pkt_len = ((status >> 16) & 0x7ff) - 4; /* * Maximum pkt_len is 1518 (1514 + vlan header) * Anything higher than this is always invalid * regardless of RxLengthOver2047 bits */ if ((status & (RxLengthOver2047 | RxDescCRCError | RxDescCollisionSeen | RxDescRunt | RxDescDescErr | RxWholePkt)) != RxWholePkt || pkt_len > 1518) { if ((status & (RxLengthOver2047 | RxWholePkt)) != RxWholePkt) { /* Ingore earlier buffers. */ if ((status & 0xffff) != 0x7fff) { if (tulip_debug > 1) printk(KERN_WARNING "%s: Oversized Ethernet frame " "spanned multiple buffers, status %8.8x!\n", dev->name, status); tp->stats.rx_length_errors++; } } else { /* There was a fatal error. */ if (tulip_debug > 2) printk(KERN_DEBUG "%s: Receive error, Rx status %8.8x.\n", dev->name, status); tp->stats.rx_errors++; /* end of a packet.*/ if (pkt_len > 1518 || (status & RxDescRunt)) tp->stats.rx_length_errors++; if (status & 0x0004) tp->stats.rx_frame_errors++; if (status & 0x0002) tp->stats.rx_crc_errors++; if (status & 0x0001) tp->stats.rx_fifo_errors++; } } else { struct sk_buff *skb; /* Check if the packet is long enough to accept without copying to a minimally-sized skbuff. */ if (pkt_len < tulip_rx_copybreak && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) { skb_reserve(skb, 2); /* 16 byte align the IP header */ pci_dma_sync_single_for_cpu(tp->pdev, tp->rx_buffers[entry].mapping, pkt_len, PCI_DMA_FROMDEVICE); #if ! defined(__alpha__) skb_copy_to_linear_data(skb, tp->rx_buffers[entry].skb->data, pkt_len); skb_put(skb, pkt_len); #else memcpy(skb_put(skb, pkt_len), tp->rx_buffers[entry].skb->data, pkt_len); #endif pci_dma_sync_single_for_device(tp->pdev, tp->rx_buffers[entry].mapping, pkt_len, PCI_DMA_FROMDEVICE); } else { /* Pass up the skb already on the Rx ring. */ char *temp = skb_put(skb = tp->rx_buffers[entry].skb, pkt_len); #ifndef final_version if (tp->rx_buffers[entry].mapping != le32_to_cpu(tp->rx_ring[entry].buffer1)) { printk(KERN_ERR "%s: Internal fault: The skbuff addresses " "do not match in tulip_rx: %08x vs. %08llx %p / %p.\n", dev->name, le32_to_cpu(tp->rx_ring[entry].buffer1), (unsigned long long)tp->rx_buffers[entry].mapping, skb->head, temp); } #endif pci_unmap_single(tp->pdev, tp->rx_buffers[entry].mapping, PKT_BUF_SZ, PCI_DMA_FROMDEVICE); tp->rx_buffers[entry].skb = NULL; tp->rx_buffers[entry].mapping = 0; } skb->protocol = eth_type_trans(skb, dev); netif_receive_skb(skb); tp->stats.rx_packets++; tp->stats.rx_bytes += pkt_len; } #ifdef CONFIG_TULIP_NAPI_HW_MITIGATION received++; #endif entry = (++tp->cur_rx) % RX_RING_SIZE; if (tp->cur_rx - tp->dirty_rx > RX_RING_SIZE/4) tulip_refill_rx(dev); } /* New ack strategy... irq does not ack Rx any longer hopefully this helps */ /* Really bad things can happen here... If new packet arrives * and an irq arrives (tx or just due to occasionally unset * mask), it will be acked by irq handler, but new thread * is not scheduled. It is major hole in design. * No idea how to fix this if "playing with fire" will fail * tomorrow (night 011029). If it will not fail, we won * finally: amount of IO did not increase at all. */ } while ((ioread32(tp->base_addr + CSR5) & RxIntr)); #ifdef CONFIG_TULIP_NAPI_HW_MITIGATION /* We use this simplistic scheme for IM. It's proven by real life installations. We can have IM enabled continuesly but this would cause unnecessary latency. Unfortunely we can't use all the NET_RX_* feedback here. This would turn on IM for devices that is not contributing to backlog congestion with unnecessary latency. We monitor the device RX-ring and have: HW Interrupt Mitigation either ON or OFF. ON: More then 1 pkt received (per intr.) OR we are dropping OFF: Only 1 pkt received Note. We only use min and max (0, 15) settings from mit_table */ if( tp->flags & HAS_INTR_MITIGATION) { if( received > 1 ) { if( ! tp->mit_on ) { tp->mit_on = 1; iowrite32(mit_table[MIT_TABLE], tp->base_addr + CSR11); } } else { if( tp->mit_on ) { tp->mit_on = 0; iowrite32(0, tp->base_addr + CSR11); } } } #endif /* CONFIG_TULIP_NAPI_HW_MITIGATION */ tulip_refill_rx(dev); /* If RX ring is not full we are out of memory. */ if (tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL) goto oom; /* Remove us from polling list and enable RX intr. */ napi_complete(napi); iowrite32(tulip_tbl[tp->chip_id].valid_intrs, tp->base_addr+CSR7); /* The last op happens after poll completion. Which means the following: * 1. it can race with disabling irqs in irq handler * 2. it can race with dise/enabling irqs in other poll threads * 3. if an irq raised after beginning loop, it will be immediately * triggered here. * * Summarizing: the logic results in some redundant irqs both * due to races in masking and due to too late acking of already * processed irqs. But it must not result in losing events. */ return work_done; not_done: if (tp->cur_rx - tp->dirty_rx > RX_RING_SIZE/2 || tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL) tulip_refill_rx(dev); if (tp->rx_buffers[tp->dirty_rx % RX_RING_SIZE].skb == NULL) goto oom; return work_done; oom: /* Executed with RX ints disabled */ /* Start timer, stop polling, but do not enable rx interrupts. */ mod_timer(&tp->oom_timer, jiffies+1); /* Think: timer_pending() was an explicit signature of bug. * Timer can be pending now but fired and completed * before we did napi_complete(). See? We would lose it. */ /* remove ourselves from the polling list */ napi_complete(napi); return work_done; } #else /* CONFIG_TULIP_NAPI */ static int tulip_rx(struct net_device *dev) { struct tulip_private *tp = netdev_priv(dev); int entry = tp->cur_rx % RX_RING_SIZE; int rx_work_limit = tp->dirty_rx + RX_RING_SIZE - tp->cur_rx; int received = 0; if (tulip_debug > 4) printk(KERN_DEBUG " In tulip_rx(), entry %d %8.8x.\n", entry, tp->rx_ring[entry].status); /* If we own the next entry, it is a new packet. Send it up. */ while ( ! (tp->rx_ring[entry].status & cpu_to_le32(DescOwned))) { s32 status = le32_to_cpu(tp->rx_ring[entry].status); short pkt_len; if (tulip_debug > 5) printk(KERN_DEBUG "%s: In tulip_rx(), entry %d %8.8x.\n", dev->name, entry, status); if (--rx_work_limit < 0) break; /* Omit the four octet CRC from the length. (May not be considered valid until we have checked status for RxLengthOver2047 bits) */ pkt_len = ((status >> 16) & 0x7ff) - 4; /* Maximum pkt_len is 1518 (1514 + vlan header) Anything higher than this is always invalid regardless of RxLengthOver2047 bits */ if ((status & (RxLengthOver2047 | RxDescCRCError | RxDescCollisionSeen | RxDescRunt | RxDescDescErr | RxWholePkt)) != RxWholePkt || pkt_len > 1518) { if ((status & (RxLengthOver2047 | RxWholePkt)) != RxWholePkt) { /* Ingore earlier buffers. */ if ((status & 0xffff) != 0x7fff) { if (tulip_debug > 1) printk(KERN_WARNING "%s: Oversized Ethernet frame " "spanned multiple buffers, status %8.8x!\n", dev->name, status); tp->stats.rx_length_errors++; } } else { /* There was a fatal error. */ if (tulip_debug > 2) printk(KERN_DEBUG "%s: Receive error, Rx status %8.8x.\n", dev->name, status); tp->stats.rx_errors++; /* end of a packet.*/ if (pkt_len > 1518 || (status & RxDescRunt)) tp->stats.rx_length_errors++; if (status & 0x0004) tp->stats.rx_frame_errors++; if (status & 0x0002) tp->stats.rx_crc_errors++; if (status & 0x0001) tp->stats.rx_fifo_errors++; } } else { struct sk_buff *skb; /* Check if the packet is long enough to accept without copying to a minimally-sized skbuff. */ if (pkt_len < tulip_rx_copybreak && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) { skb_reserve(skb, 2); /* 16 byte align the IP header */ pci_dma_sync_single_for_cpu(tp->pdev, tp->rx_buffers[entry].mapping, pkt_len, PCI_DMA_FROMDEVICE); #if ! defined(__alpha__) skb_copy_to_linear_data(skb, tp->rx_buffers[entry].skb->data, pkt_len); skb_put(skb, pkt_len); #else memcpy(skb_put(skb, pkt_len), tp->rx_buffers[entry].skb->data, pkt_len); #endif pci_dma_sync_single_for_device(tp->pdev, tp->rx_buffers[entry].mapping, pkt_len, PCI_DMA_FROMDEVICE); } else { /* Pass up the skb already on the Rx ring. */ char *temp = skb_put(skb = tp->rx_buffers[entry].skb, pkt_len); #ifndef final_version if (tp->rx_buffers[entry].mapping != le32_to_cpu(tp->rx_ring[entry].buffer1)) { printk(KERN_ERR "%s: Internal fault: The skbuff addresses " "do not match in tulip_rx: %08x vs. %Lx %p / %p.\n", dev->name, le32_to_cpu(tp->rx_ring[entry].buffer1), (long long)tp->rx_buffers[entry].mapping, skb->head, temp); } #endif pci_unmap_single(tp->pdev, tp->rx_buffers[entry].mapping, PKT_BUF_SZ, PCI_DMA_FROMDEVICE); tp->rx_buffers[entry].skb = NULL; tp->rx_buffers[entry].mapping = 0; } skb->protocol = eth_type_trans(skb, dev); netif_rx(skb); tp->stats.rx_packets++; tp->stats.rx_bytes += pkt_len; } received++; entry = (++tp->cur_rx) % RX_RING_SIZE; } return received; } #endif /* CONFIG_TULIP_NAPI */ static inline unsigned int phy_interrupt (struct net_device *dev) { #ifdef __hppa__ struct tulip_private *tp = netdev_priv(dev); int csr12 = ioread32(tp->base_addr + CSR12) & 0xff; if (csr12 != tp->csr12_shadow) { /* ack interrupt */ iowrite32(csr12 | 0x02, tp->base_addr + CSR12); tp->csr12_shadow = csr12; /* do link change stuff */ spin_lock(&tp->lock); tulip_check_duplex(dev); spin_unlock(&tp->lock); /* clear irq ack bit */ iowrite32(csr12 & ~0x02, tp->base_addr + CSR12); return 1; } #endif return 0; } /* The interrupt handler does all of the Rx thread work and cleans up after the Tx thread. */ irqreturn_t tulip_interrupt(int irq, void *dev_instance) { struct net_device *dev = (struct net_device *)dev_instance; struct tulip_private *tp = netdev_priv(dev); void __iomem *ioaddr = tp->base_addr; int csr5; int missed; int rx = 0; int tx = 0; int oi = 0; int maxrx = RX_RING_SIZE; int maxtx = TX_RING_SIZE; int maxoi = TX_RING_SIZE; #ifdef CONFIG_TULIP_NAPI int rxd = 0; #else int entry; #endif unsigned int work_count = tulip_max_interrupt_work; unsigned int handled = 0; /* Let's see whether the interrupt really is for us */ csr5 = ioread32(ioaddr + CSR5); if (tp->flags & HAS_PHY_IRQ) handled = phy_interrupt (dev); if ((csr5 & (NormalIntr|AbnormalIntr)) == 0) return IRQ_RETVAL(handled); tp->nir++; do { #ifdef CONFIG_TULIP_NAPI if (!rxd && (csr5 & (RxIntr | RxNoBuf))) { rxd++; /* Mask RX intrs and add the device to poll list. */ iowrite32(tulip_tbl[tp->chip_id].valid_intrs&~RxPollInt, ioaddr + CSR7); napi_schedule(&tp->napi); if (!(csr5&~(AbnormalIntr|NormalIntr|RxPollInt|TPLnkPass))) break; } /* Acknowledge the interrupt sources we handle here ASAP the poll function does Rx and RxNoBuf acking */ iowrite32(csr5 & 0x0001ff3f, ioaddr + CSR5); #else /* Acknowledge all of the current interrupt sources ASAP. */ iowrite32(csr5 & 0x0001ffff, ioaddr + CSR5); if (csr5 & (RxIntr | RxNoBuf)) { rx += tulip_rx(dev); tulip_refill_rx(dev); } #endif /* CONFIG_TULIP_NAPI */ if (tulip_debug > 4) printk(KERN_DEBUG "%s: interrupt csr5=%#8.8x new csr5=%#8.8x.\n", dev->name, csr5, ioread32(ioaddr + CSR5)); if (csr5 & (TxNoBuf | TxDied | TxIntr | TimerInt)) { unsigned int dirty_tx; spin_lock(&tp->lock); for (dirty_tx = tp->dirty_tx; tp->cur_tx - dirty_tx > 0; dirty_tx++) { int entry = dirty_tx % TX_RING_SIZE; int status = le32_to_cpu(tp->tx_ring[entry].status); if (status < 0) break; /* It still has not been Txed */ /* Check for Rx filter setup frames. */ if (tp->tx_buffers[entry].skb == NULL) { /* test because dummy frames not mapped */ if (tp->tx_buffers[entry].mapping) pci_unmap_single(tp->pdev, tp->tx_buffers[entry].mapping, sizeof(tp->setup_frame), PCI_DMA_TODEVICE); continue; } if (status & 0x8000) { /* There was an major error, log it. */ #ifndef final_version if (tulip_debug > 1) printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n", dev->name, status); #endif tp->stats.tx_errors++; if (status & 0x4104) tp->stats.tx_aborted_errors++; if (status & 0x0C00) tp->stats.tx_carrier_errors++; if (status & 0x0200) tp->stats.tx_window_errors++; if (status & 0x0002) tp->stats.tx_fifo_errors++; if ((status & 0x0080) && tp->full_duplex == 0) tp->stats.tx_heartbeat_errors++; } else { tp->stats.tx_bytes += tp->tx_buffers[entry].skb->len; tp->stats.collisions += (status >> 3) & 15; tp->stats.tx_packets++; } pci_unmap_single(tp->pdev, tp->tx_buffers[entry].mapping, tp->tx_buffers[entry].skb->len, PCI_DMA_TODEVICE); /* Free the original skb. */ dev_kfree_skb_irq(tp->tx_buffers[entry].skb); tp->tx_buffers[entry].skb = NULL; tp->tx_buffers[entry].mapping = 0; tx++; } #ifndef final_version if (tp->cur_tx - dirty_tx > TX_RING_SIZE) { printk(KERN_ERR "%s: Out-of-sync dirty pointer, %d vs. %d.\n", dev->name, dirty_tx, tp->cur_tx); dirty_tx += TX_RING_SIZE; } #endif if (tp->cur_tx - dirty_tx < TX_RING_SIZE - 2) netif_wake_queue(dev); tp->dirty_tx = dirty_tx; if (csr5 & TxDied) { if (tulip_debug > 2) printk(KERN_WARNING "%s: The transmitter stopped." " CSR5 is %x, CSR6 %x, new CSR6 %x.\n", dev->name, csr5, ioread32(ioaddr + CSR6), tp->csr6); tulip_restart_rxtx(tp); } spin_unlock(&tp->lock); } /* Log errors. */ if (csr5 & AbnormalIntr) { /* Abnormal error summary bit. */ if (csr5 == 0xffffffff) break; if (csr5 & TxJabber) tp->stats.tx_errors++; if (csr5 & TxFIFOUnderflow) { if ((tp->csr6 & 0xC000) != 0xC000) tp->csr6 += 0x4000; /* Bump up the Tx threshold */ else tp->csr6 |= 0x00200000; /* Store-n-forward. */ /* Restart the transmit process. */ tulip_restart_rxtx(tp); iowrite32(0, ioaddr + CSR1); } if (csr5 & (RxDied | RxNoBuf)) { if (tp->flags & COMET_MAC_ADDR) { iowrite32(tp->mc_filter[0], ioaddr + 0xAC); iowrite32(tp->mc_filter[1], ioaddr + 0xB0); } } if (csr5 & RxDied) { /* Missed a Rx frame. */ tp->stats.rx_missed_errors += ioread32(ioaddr + CSR8) & 0xffff; tp->stats.rx_errors++; tulip_start_rxtx(tp); } /* * NB: t21142_lnk_change() does a del_timer_sync(), so be careful if this * call is ever done under the spinlock */ if (csr5 & (TPLnkPass | TPLnkFail | 0x08000000)) { if (tp->link_change) (tp->link_change)(dev, csr5); } if (csr5 & SystemError) { int error = (csr5 >> 23) & 7; /* oops, we hit a PCI error. The code produced corresponds * to the reason: * 0 - parity error * 1 - master abort * 2 - target abort * Note that on parity error, we should do a software reset * of the chip to get it back into a sane state (according * to the 21142/3 docs that is). * -- rmk */ printk(KERN_ERR "%s: (%lu) System Error occurred (%d)\n", dev->name, tp->nir, error); } /* Clear all error sources, included undocumented ones! */ iowrite32(0x0800f7ba, ioaddr + CSR5); oi++; } if (csr5 & TimerInt) { if (tulip_debug > 2) printk(KERN_ERR "%s: Re-enabling interrupts, %8.8x.\n", dev->name, csr5); iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7); tp->ttimer = 0; oi++; } if (tx > maxtx || rx > maxrx || oi > maxoi) { if (tulip_debug > 1) printk(KERN_WARNING "%s: Too much work during an interrupt, " "csr5=0x%8.8x. (%lu) (%d,%d,%d)\n", dev->name, csr5, tp->nir, tx, rx, oi); /* Acknowledge all interrupt sources. */ iowrite32(0x8001ffff, ioaddr + CSR5); if (tp->flags & HAS_INTR_MITIGATION) { /* Josip Loncaric at ICASE did extensive experimentation to develop a good interrupt mitigation setting.*/ iowrite32(0x8b240000, ioaddr + CSR11); } else if (tp->chip_id == LC82C168) { /* the LC82C168 doesn't have a hw timer.*/ iowrite32(0x00, ioaddr + CSR7); mod_timer(&tp->timer, RUN_AT(HZ/50)); } else { /* Mask all interrupting sources, set timer to re-enable. */ iowrite32(((~csr5) & 0x0001ebef) | AbnormalIntr | TimerInt, ioaddr + CSR7); iowrite32(0x0012, ioaddr + CSR11); } break; } work_count--; if (work_count == 0) break; csr5 = ioread32(ioaddr + CSR5); #ifdef CONFIG_TULIP_NAPI if (rxd) csr5 &= ~RxPollInt; } while ((csr5 & (TxNoBuf | TxDied | TxIntr | TimerInt | /* Abnormal intr. */ RxDied | TxFIFOUnderflow | TxJabber | TPLnkFail | SystemError )) != 0); #else } while ((csr5 & (NormalIntr|AbnormalIntr)) != 0); tulip_refill_rx(dev); /* check if the card is in suspend mode */ entry = tp->dirty_rx % RX_RING_SIZE; if (tp->rx_buffers[entry].skb == NULL) { if (tulip_debug > 1) printk(KERN_WARNING "%s: in rx suspend mode: (%lu) (tp->cur_rx = %u, ttimer = %d, rx = %d) go/stay in suspend mode\n", dev->name, tp->nir, tp->cur_rx, tp->ttimer, rx); if (tp->chip_id == LC82C168) { iowrite32(0x00, ioaddr + CSR7); mod_timer(&tp->timer, RUN_AT(HZ/50)); } else { if (tp->ttimer == 0 || (ioread32(ioaddr + CSR11) & 0xffff) == 0) { if (tulip_debug > 1) printk(KERN_WARNING "%s: in rx suspend mode: (%lu) set timer\n", dev->name, tp->nir); iowrite32(tulip_tbl[tp->chip_id].valid_intrs | TimerInt, ioaddr + CSR7); iowrite32(TimerInt, ioaddr + CSR5); iowrite32(12, ioaddr + CSR11); tp->ttimer = 1; } } } #endif /* CONFIG_TULIP_NAPI */ if ((missed = ioread32(ioaddr + CSR8) & 0x1ffff)) { tp->stats.rx_dropped += missed & 0x10000 ? 0x10000 : missed; } if (tulip_debug > 4) printk(KERN_DEBUG "%s: exiting interrupt, csr5=%#4.4x.\n", dev->name, ioread32(ioaddr + CSR5)); return IRQ_HANDLED; } |