drivers/net/rrunner.c

   1 /*
   2  * rrunner.c: Linux driver for the Essential RoadRunner HIPPI board.
   3  *
   4  * Copyright (C) 1998-2002 by Jes Sorensen, <jes@wildopensource.com>.
   5  *
   6  * Thanks to Essential Communication for providing us with hardware
   7  * and very comprehensive documentation without which I would not have
   8  * been able to write this driver. A special thank you to John Gibbon
   9  * for sorting out the legal issues, with the NDA, allowing the code to
  10  * be released under the GPL.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * Thanks to Jayaram Bhat from ODS/Essential for fixing some of the
  18  * stupid bugs in my code.
  19  *
  20  * Softnet support and various other patches from Val Henson of
  21  * ODS/Essential.
  22  *
  23  * PCI DMA mapping code partly based on work by Francois Romieu.
  24  */
  25
  26
  27 #define DEBUG 1
  28 #define RX_DMA_SKBUFF 1
  29 #define PKT_COPY_THRESHOLD 512
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/errno.h>
  34 #include <linux/ioport.h>
  35 #include <linux/pci.h>
  36 #include <linux/kernel.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/hippidevice.h>
  39 #include <linux/skbuff.h>
  40 #include <linux/init.h>
  41 #include <linux/delay.h>
  42 #include <linux/mm.h>
  43 #include <net/sock.h>
  44
  45 #include <asm/system.h>
  46 #include <asm/cache.h>
  47 #include <asm/byteorder.h>
  48 #include <asm/io.h>
  49 #include <asm/irq.h>
  50 #include <asm/uaccess.h>
  51
  52 #define rr_if_busy(dev)     netif_queue_stopped(dev)
  53 #define rr_if_running(dev)  netif_running(dev)
  54
  55 #include "rrunner.h"
  56
  57 #define RUN_AT(x) (jiffies + (x))
  58
  59
  60 MODULE_AUTHOR("Jes Sorensen <jes@wildopensource.com>");
  61 MODULE_DESCRIPTION("Essential RoadRunner HIPPI driver");
  62 MODULE_LICENSE("GPL");
  63
  64 static char version[] __devinitdata = "rrunner.c: v0.50 11/11/2002  Jes Sorensen (jes@wildopensource.com)\n";
  65
  66 /*
  67  * Implementation notes:
  68  *
  69  * The DMA engine only allows for DMA within physical 64KB chunks of
  70  * memory. The current approach of the driver (and stack) is to use
  71  * linear blocks of memory for the skbuffs. However, as the data block
  72  * is always the first part of the skb and skbs are 2^n aligned so we
  73  * are guarantted to get the whole block within one 64KB align 64KB
  74  * chunk.
  75  *
  76  * On the long term, relying on being able to allocate 64KB linear
  77  * chunks of memory is not feasible and the skb handling code and the
  78  * stack will need to know about I/O vectors or something similar.
  79  */
  80
  81 static int __devinit rr_init_one(struct pci_dev *pdev,
  82         const struct pci_device_id *ent)
  83 {
  84         struct net_device *dev;
  85         static int version_disp;
  86         u8 pci_latency;
  87         struct rr_private *rrpriv;
  88         void *tmpptr;
  89         dma_addr_t ring_dma;
  90         int ret = -ENOMEM;
  91
  92         dev = alloc_hippi_dev(sizeof(struct rr_private));
  93         if (!dev)
  94                 goto out3;
  95
  96         ret = pci_enable_device(pdev);
  97         if (ret) {
  98                 ret = -ENODEV;
  99                 goto out2;
 100         }
 101
 102         rrpriv = netdev_priv(dev);
 103
 104         SET_NETDEV_DEV(dev, &pdev->dev);
 105
 106         if (pci_request_regions(pdev, "rrunner")) {
 107                 ret = -EIO;
 108                 goto out;
 109         }
 110
 111         pci_set_drvdata(pdev, dev);
 112
 113         rrpriv->pci_dev = pdev;
 114
 115         spin_lock_init(&rrpriv->lock);
 116
 117         dev->irq = pdev->irq;
 118         dev->open = &rr_open;
 119         dev->hard_start_xmit = &rr_start_xmit;
 120         dev->stop = &rr_close;
 121         dev->do_ioctl = &rr_ioctl;
 122
 123         dev->base_addr = pci_resource_start(pdev, 0);
 124
 125         /* display version info if adapter is found */
 126         if (!version_disp) {
 127                 /* set display flag to TRUE so that */
 128                 /* we only display this string ONCE */
 129                 version_disp = 1;
 130                 printk(version);
 131         }
 132
 133         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
 134         if (pci_latency <= 0x58){
 135                 pci_latency = 0x58;
 136                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, pci_latency);
 137         }
 138
 139         pci_set_master(pdev);
 140
 141         printk(KERN_INFO "%s: Essential RoadRunner serial HIPPI "
 142                "at 0x%08lx, irq %i, PCI latency %i\n", dev->name,
 143                dev->base_addr, dev->irq, pci_latency);
 144
 145         /*
 146          * Remap the regs into kernel space.
 147          */
 148
 149         rrpriv->regs = ioremap(dev->base_addr, 0x1000);
 150
 151         if (!rrpriv->regs){
 152                 printk(KERN_ERR "%s:  Unable to map I/O register, "
 153                         "RoadRunner will be disabled.\n", dev->name);
 154                 ret = -EIO;
 155                 goto out;
 156         }
 157
 158         tmpptr = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
 159         rrpriv->tx_ring = tmpptr;
 160         rrpriv->tx_ring_dma = ring_dma;
 161
 162         if (!tmpptr) {
 163                 ret = -ENOMEM;
 164                 goto out;
 165         }
 166
 167         tmpptr = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
 168         rrpriv->rx_ring = tmpptr;
 169         rrpriv->rx_ring_dma = ring_dma;
 170
 171         if (!tmpptr) {
 172                 ret = -ENOMEM;
 173                 goto out;
 174         }
 175
 176         tmpptr = pci_alloc_consistent(pdev, EVT_RING_SIZE, &ring_dma);
 177         rrpriv->evt_ring = tmpptr;
 178         rrpriv->evt_ring_dma = ring_dma;
 179
 180         if (!tmpptr) {
 181                 ret = -ENOMEM;
 182                 goto out;
 183         }
 184
 185         /*
 186          * Don't access any register before this point!
 187          */
 188 #ifdef __BIG_ENDIAN
 189         writel(readl(&rrpriv->regs->HostCtrl) | NO_SWAP,
 190                 &rrpriv->regs->HostCtrl);
 191 #endif
 192         /*
 193          * Need to add a case for little-endian 64-bit hosts here.
 194          */
 195
 196         rr_init(dev);
 197
 198         dev->base_addr = 0;
 199
 200         ret = register_netdev(dev);
 201         if (ret)
 202                 goto out;
 203         return 0;
 204
 205  out:
 206         if (rrpriv->rx_ring)
 207                 pci_free_consistent(pdev, RX_TOTAL_SIZE, rrpriv->rx_ring,
 208                                     rrpriv->rx_ring_dma);
 209         if (rrpriv->tx_ring)
 210                 pci_free_consistent(pdev, TX_TOTAL_SIZE, rrpriv->tx_ring,
 211                                     rrpriv->tx_ring_dma);
 212         if (rrpriv->regs)
 213                 iounmap(rrpriv->regs);
 214         if (pdev) {
 215                 pci_release_regions(pdev);
 216                 pci_set_drvdata(pdev, NULL);
 217         }
 218  out2:
 219         free_netdev(dev);
 220  out3:
 221         return ret;
 222 }
 223
 224 static void __devexit rr_remove_one (struct pci_dev *pdev)
 225 {
 226         struct net_device *dev = pci_get_drvdata(pdev);
 227
 228         if (dev) {
 229                 struct rr_private *rr = netdev_priv(dev);
 230
 231                 if (!(readl(&rr->regs->HostCtrl) & NIC_HALTED)){
 232                         printk(KERN_ERR "%s: trying to unload running NIC\n",
 233                                dev->name);
 234                         writel(HALT_NIC, &rr->regs->HostCtrl);
 235                 }
 236
 237                 pci_free_consistent(pdev, EVT_RING_SIZE, rr->evt_ring,
 238                                     rr->evt_ring_dma);
 239                 pci_free_consistent(pdev, RX_TOTAL_SIZE, rr->rx_ring,
 240                                     rr->rx_ring_dma);
 241                 pci_free_consistent(pdev, TX_TOTAL_SIZE, rr->tx_ring,
 242                                     rr->tx_ring_dma);
 243                 unregister_netdev(dev);
 244                 iounmap(rr->regs);
 245                 free_netdev(dev);
 246                 pci_release_regions(pdev);
 247                 pci_disable_device(pdev);
 248                 pci_set_drvdata(pdev, NULL);
 249         }
 250 }
 251
 252
 253 /*
 254  * Commands are considered to be slow, thus there is no reason to
 255  * inline this.
 256  */
 257 static void rr_issue_cmd(struct rr_private *rrpriv, struct cmd *cmd)
 258 {
 259         struct rr_regs __iomem *regs;
 260         u32 idx;
 261
 262         regs = rrpriv->regs;
 263         /*
 264          * This is temporary - it will go away in the final version.
 265          * We probably also want to make this function inline.
 266          */
 267         if (readl(&regs->HostCtrl) & NIC_HALTED){
 268                 printk("issuing command for halted NIC, code 0x%x, "
 269                        "HostCtrl %08x\n", cmd->code, readl(&regs->HostCtrl));
 270                 if (readl(&regs->Mode) & FATAL_ERR)
 271                         printk("error codes Fail1 %02x, Fail2 %02x\n",
 272                                readl(&regs->Fail1), readl(&regs->Fail2));
 273         }
 274
 275         idx = rrpriv->info->cmd_ctrl.pi;
 276
 277         writel(*(u32*)(cmd), &regs->CmdRing[idx]);
 278         wmb();
 279
 280         idx = (idx - 1) % CMD_RING_ENTRIES;
 281         rrpriv->info->cmd_ctrl.pi = idx;
 282         wmb();
 283
 284         if (readl(&regs->Mode) & FATAL_ERR)
 285                 printk("error code %02x\n", readl(&regs->Fail1));
 286 }
 287
 288
 289 /*
 290  * Reset the board in a sensible manner. The NIC is already halted
 291  * when we get here and a spin-lock is held.
 292  */
 293 static int rr_reset(struct net_device *dev)
 294 {
 295         struct rr_private *rrpriv;
 296         struct rr_regs __iomem *regs;
 297         u32 start_pc;
 298         int i;
 299
 300         rrpriv = netdev_priv(dev);
 301         regs = rrpriv->regs;
 302
 303         rr_load_firmware(dev);
 304
 305         writel(0x01000000, &regs->TX_state);
 306         writel(0xff800000, &regs->RX_state);
 307         writel(0, &regs->AssistState);
 308         writel(CLEAR_INTA, &regs->LocalCtrl);
 309         writel(0x01, &regs->BrkPt);
 310         writel(0, &regs->Timer);
 311         writel(0, &regs->TimerRef);
 312         writel(RESET_DMA, &regs->DmaReadState);
 313         writel(RESET_DMA, &regs->DmaWriteState);
 314         writel(0, &regs->DmaWriteHostHi);
 315         writel(0, &regs->DmaWriteHostLo);
 316         writel(0, &regs->DmaReadHostHi);
 317         writel(0, &regs->DmaReadHostLo);
 318         writel(0, &regs->DmaReadLen);
 319         writel(0, &regs->DmaWriteLen);
 320         writel(0, &regs->DmaWriteLcl);
 321         writel(0, &regs->DmaWriteIPchecksum);
 322         writel(0, &regs->DmaReadLcl);
 323         writel(0, &regs->DmaReadIPchecksum);
 324         writel(0, &regs->PciState);
 325 #if (BITS_PER_LONG == 64) && defined __LITTLE_ENDIAN
 326         writel(SWAP_DATA | PTR64BIT | PTR_WD_SWAP, &regs->Mode);
 327 #elif (BITS_PER_LONG == 64)
 328         writel(SWAP_DATA | PTR64BIT | PTR_WD_NOSWAP, &regs->Mode);
 329 #else
 330         writel(SWAP_DATA | PTR32BIT | PTR_WD_NOSWAP, &regs->Mode);
 331 #endif
 332
 333 #if 0
 334         /*
 335          * Don't worry, this is just black magic.
 336          */
 337         writel(0xdf000, &regs->RxBase);
 338         writel(0xdf000, &regs->RxPrd);
 339         writel(0xdf000, &regs->RxCon);
 340         writel(0xce000, &regs->TxBase);
 341         writel(0xce000, &regs->TxPrd);
 342         writel(0xce000, &regs->TxCon);
 343         writel(0, &regs->RxIndPro);
 344         writel(0, &regs->RxIndCon);
 345         writel(0, &regs->RxIndRef);
 346         writel(0, &regs->TxIndPro);
 347         writel(0, &regs->TxIndCon);
 348         writel(0, &regs->TxIndRef);
 349         writel(0xcc000, &regs->pad10[0]);
 350         writel(0, &regs->DrCmndPro);
 351         writel(0, &regs->DrCmndCon);
 352         writel(0, &regs->DwCmndPro);
 353         writel(0, &regs->DwCmndCon);
 354         writel(0, &regs->DwCmndRef);
 355         writel(0, &regs->DrDataPro);
 356         writel(0, &regs->DrDataCon);
 357         writel(0, &regs->DrDataRef);
 358         writel(0, &regs->DwDataPro);
 359         writel(0, &regs->DwDataCon);
 360         writel(0, &regs->DwDataRef);
 361 #endif
 362
 363         writel(0xffffffff, &regs->MbEvent);
 364         writel(0, &regs->Event);
 365
 366         writel(0, &regs->TxPi);
 367         writel(0, &regs->IpRxPi);
 368
 369         writel(0, &regs->EvtCon);
 370         writel(0, &regs->EvtPrd);
 371
 372         rrpriv->info->evt_ctrl.pi = 0;
 373
 374         for (i = 0; i < CMD_RING_ENTRIES; i++)
 375                 writel(0, &regs->CmdRing[i]);
 376
 377 /*
 378  * Why 32 ? is this not cache line size dependent?
 379  */
 380         writel(RBURST_64|WBURST_64, &regs->PciState);
 381         wmb();
 382
 383         start_pc = rr_read_eeprom_word(rrpriv,
 384                         offsetof(struct eeprom, rncd_info.FwStart));
 385
 386 #if (DEBUG > 1)
 387         printk("%s: Executing firmware at address 0x%06x\n",
 388                dev->name, start_pc);
 389 #endif
 390
 391         writel(start_pc + 0x800, &regs->Pc);
 392         wmb();
 393         udelay(5);
 394
 395         writel(start_pc, &regs->Pc);
 396         wmb();
 397
 398         return 0;
 399 }
 400
 401
 402 /*
 403  * Read a string from the EEPROM.
 404  */
 405 static unsigned int rr_read_eeprom(struct rr_private *rrpriv,
 406                                 unsigned long offset,
 407                                 unsigned char *buf,
 408                                 unsigned long length)
 409 {
 410         struct rr_regs __iomem *regs = rrpriv->regs;
 411         u32 misc, io, host, i;
 412
 413         io = readl(&regs->ExtIo);
 414         writel(0, &regs->ExtIo);
 415         misc = readl(&regs->LocalCtrl);
 416         writel(0, &regs->LocalCtrl);
 417         host = readl(&regs->HostCtrl);
 418         writel(host | HALT_NIC, &regs->HostCtrl);
 419         mb();
 420
 421         for (i = 0; i < length; i++){
 422                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 423                 mb();
 424                 buf[i] = (readl(&regs->WinData) >> 24) & 0xff;
 425                 mb();
 426         }
 427
 428         writel(host, &regs->HostCtrl);
 429         writel(misc, &regs->LocalCtrl);
 430         writel(io, &regs->ExtIo);
 431         mb();
 432         return i;
 433 }
 434
 435
 436 /*
 437  * Shortcut to read one word (4 bytes) out of the EEPROM and convert
 438  * it to our CPU byte-order.
 439  */
 440 static u32 rr_read_eeprom_word(struct rr_private *rrpriv,
 441                             size_t offset)
 442 {
 443         __be32 word;
 444
 445         if ((rr_read_eeprom(rrpriv, offset,
 446                             (unsigned char *)&word, 4) == 4))
 447                 return be32_to_cpu(word);
 448         return 0;
 449 }
 450
 451
 452 /*
 453  * Write a string to the EEPROM.
 454  *
 455  * This is only called when the firmware is not running.
 456  */
 457 static unsigned int write_eeprom(struct rr_private *rrpriv,
 458                                  unsigned long offset,
 459                                  unsigned char *buf,
 460                                  unsigned long length)
 461 {
 462         struct rr_regs __iomem *regs = rrpriv->regs;
 463         u32 misc, io, data, i, j, ready, error = 0;
 464
 465         io = readl(&regs->ExtIo);
 466         writel(0, &regs->ExtIo);
 467         misc = readl(&regs->LocalCtrl);
 468         writel(ENABLE_EEPROM_WRITE, &regs->LocalCtrl);
 469         mb();
 470
 471         for (i = 0; i < length; i++){
 472                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 473                 mb();
 474                 data = buf[i] << 24;
 475                 /*
 476                  * Only try to write the data if it is not the same
 477                  * value already.
 478                  */
 479                 if ((readl(&regs->WinData) & 0xff000000) != data){
 480                         writel(data, &regs->WinData);
 481                         ready = 0;
 482                         j = 0;
 483                         mb();
 484                         while(!ready){
 485                                 udelay(20);
 486                                 if ((readl(&regs->WinData) & 0xff000000) ==
 487                                     data)
 488                                         ready = 1;
 489                                 mb();
 490                                 if (j++ > 5000){
 491                                         printk("data mismatch: %08x, "
 492                                                "WinData %08x\n", data,
 493                                                readl(&regs->WinData));
 494                                         ready = 1;
 495                                         error = 1;
 496                                 }
 497                         }
 498                 }
 499         }
 500
 501         writel(misc, &regs->LocalCtrl);
 502         writel(io, &regs->ExtIo);
 503         mb();
 504
 505         return error;
 506 }
 507
 508
 509 static int __devinit rr_init(struct net_device *dev)
 510 {
 511         struct rr_private *rrpriv;
 512         struct rr_regs __iomem *regs;
 513         u32 sram_size, rev;
 514         DECLARE_MAC_BUF(mac);
 515
 516         rrpriv = netdev_priv(dev);
 517         regs = rrpriv->regs;
 518
 519         rev = readl(&regs->FwRev);
 520         rrpriv->fw_rev = rev;
 521         if (rev > 0x00020024)
 522                 printk("  Firmware revision: %i.%i.%i\n", (rev >> 16),
 523                        ((rev >> 8) & 0xff), (rev & 0xff));
 524         else if (rev >= 0x00020000) {
 525                 printk("  Firmware revision: %i.%i.%i (2.0.37 or "
 526                        "later is recommended)\n", (rev >> 16),
 527                        ((rev >> 8) & 0xff), (rev & 0xff));
 528         }else{
 529                 printk("  Firmware revision too old: %i.%i.%i, please "
 530                        "upgrade to 2.0.37 or later.\n",
 531                        (rev >> 16), ((rev >> 8) & 0xff), (rev & 0xff));
 532         }
 533
 534 #if (DEBUG > 2)
 535         printk("  Maximum receive rings %i\n", readl(&regs->MaxRxRng));
 536 #endif
 537
 538         /*
 539          * Read the hardware address from the eeprom.  The HW address
 540          * is not really necessary for HIPPI but awfully convenient.
 541          * The pointer arithmetic to put it in dev_addr is ugly, but
 542          * Donald Becker does it this way for the GigE version of this
 543          * card and it's shorter and more portable than any
 544          * other method I've seen.  -VAL
 545          */
 546
 547         *(__be16 *)(dev->dev_addr) =
 548           htons(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA)));
 549         *(__be32 *)(dev->dev_addr+2) =
 550           htonl(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA[4])));
 551
 552         printk("  MAC: %s\n", print_mac(mac, dev->dev_addr));
 553
 554         sram_size = rr_read_eeprom_word(rrpriv, 8);
 555         printk("  SRAM size 0x%06x\n", sram_size);
 556
 557         return 0;
 558 }
 559
 560
 561 static int rr_init1(struct net_device *dev)
 562 {
 563         struct rr_private *rrpriv;
 564         struct rr_regs __iomem *regs;
 565         unsigned long myjif, flags;
 566         struct cmd cmd;
 567         u32 hostctrl;
 568         int ecode = 0;
 569         short i;
 570
 571         rrpriv = netdev_priv(dev);
 572         regs = rrpriv->regs;
 573
 574         spin_lock_irqsave(&rrpriv->lock, flags);
 575
 576         hostctrl = readl(&regs->HostCtrl);
 577         writel(hostctrl | HALT_NIC | RR_CLEAR_INT, &regs->HostCtrl);
 578         wmb();
 579
 580         if (hostctrl & PARITY_ERR){
 581                 printk("%s: Parity error halting NIC - this is serious!\n",
 582                        dev->name);
 583                 spin_unlock_irqrestore(&rrpriv->lock, flags);
 584                 ecode = -EFAULT;
 585                 goto error;
 586         }
 587
 588         set_rxaddr(regs, rrpriv->rx_ctrl_dma);
 589         set_infoaddr(regs, rrpriv->info_dma);
 590
 591         rrpriv->info->evt_ctrl.entry_size = sizeof(struct event);
 592         rrpriv->info->evt_ctrl.entries = EVT_RING_ENTRIES;
 593         rrpriv->info->evt_ctrl.mode = 0;
 594         rrpriv->info->evt_ctrl.pi = 0;
 595         set_rraddr(&rrpriv->info->evt_ctrl.rngptr, rrpriv->evt_ring_dma);
 596
 597         rrpriv->info->cmd_ctrl.entry_size = sizeof(struct cmd);
 598         rrpriv->info->cmd_ctrl.entries = CMD_RING_ENTRIES;
 599         rrpriv->info->cmd_ctrl.mode = 0;
 600         rrpriv->info->cmd_ctrl.pi = 15;
 601
 602         for (i = 0; i < CMD_RING_ENTRIES; i++) {
 603                 writel(0, &regs->CmdRing[i]);
 604         }
 605
 606         for (i = 0; i < TX_RING_ENTRIES; i++) {
 607                 rrpriv->tx_ring[i].size = 0;
 608                 set_rraddr(&rrpriv->tx_ring[i].addr, 0);
 609                 rrpriv->tx_skbuff[i] = NULL;
 610         }
 611         rrpriv->info->tx_ctrl.entry_size = sizeof(struct tx_desc);
 612         rrpriv->info->tx_ctrl.entries = TX_RING_ENTRIES;
 613         rrpriv->info->tx_ctrl.mode = 0;
 614         rrpriv->info->tx_ctrl.pi = 0;
 615         set_rraddr(&rrpriv->info->tx_ctrl.rngptr, rrpriv->tx_ring_dma);
 616
 617         /*
 618          * Set dirty_tx before we start receiving interrupts, otherwise
 619          * the interrupt handler might think it is supposed to process
 620          * tx ints before we are up and running, which may cause a null
 621          * pointer access in the int handler.
 622          */
 623         rrpriv->tx_full = 0;
 624         rrpriv->cur_rx = 0;
 625         rrpriv->dirty_rx = rrpriv->dirty_tx = 0;
 626
 627         rr_reset(dev);
 628
 629         /* Tuning values */
 630         writel(0x5000, &regs->ConRetry);
 631         writel(0x100, &regs->ConRetryTmr);
 632         writel(0x500000, &regs->ConTmout);
 633         writel(0x60, &regs->IntrTmr);
 634         writel(0x500000, &regs->TxDataMvTimeout);
 635         writel(0x200000, &regs->RxDataMvTimeout);
 636         writel(0x80, &regs->WriteDmaThresh);
 637         writel(0x80, &regs->ReadDmaThresh);
 638
 639         rrpriv->fw_running = 0;
 640         wmb();
 641
 642         hostctrl &= ~(HALT_NIC | INVALID_INST_B | PARITY_ERR);
 643         writel(hostctrl, &regs->HostCtrl);
 644         wmb();
 645
 646         spin_unlock_irqrestore(&rrpriv->lock, flags);
 647
 648         for (i = 0; i < RX_RING_ENTRIES; i++) {
 649                 struct sk_buff *skb;
 650                 dma_addr_t addr;
 651
 652                 rrpriv->rx_ring[i].mode = 0;
 653                 skb = alloc_skb(dev->mtu + HIPPI_HLEN, GFP_ATOMIC);
 654                 if (!skb) {
 655                         printk(KERN_WARNING "%s: Unable to allocate memory "
 656                                "for receive ring - halting NIC\n", dev->name);
 657                         ecode = -ENOMEM;
 658                         goto error;
 659                 }
 660                 rrpriv->rx_skbuff[i] = skb;
 661                 addr = pci_map_single(rrpriv->pci_dev, skb->data,
 662                         dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
 663                 /*
 664                  * Sanity test to see if we conflict with the DMA
 665                  * limitations of the Roadrunner.
 666                  */
 667                 if ((((unsigned long)skb->data) & 0xfff) > ~65320)
 668                         printk("skb alloc error\n");
 669
 670                 set_rraddr(&rrpriv->rx_ring[i].addr, addr);
 671                 rrpriv->rx_ring[i].size = dev->mtu + HIPPI_HLEN;
 672         }
 673
 674         rrpriv->rx_ctrl[4].entry_size = sizeof(struct rx_desc);
 675         rrpriv->rx_ctrl[4].entries = RX_RING_ENTRIES;
 676         rrpriv->rx_ctrl[4].mode = 8;
 677         rrpriv->rx_ctrl[4].pi = 0;
 678         wmb();
 679         set_rraddr(&rrpriv->rx_ctrl[4].rngptr, rrpriv->rx_ring_dma);
 680
 681         udelay(1000);
 682
 683         /*
 684          * Now start the FirmWare.
 685          */
 686         cmd.code = C_START_FW;
 687         cmd.ring = 0;
 688         cmd.index = 0;
 689
 690         rr_issue_cmd(rrpriv, &cmd);
 691
 692         /*
 693          * Give the FirmWare time to chew on the `get running' command.
 694          */
 695         myjif = jiffies + 5 * HZ;
 696         while (time_before(jiffies, myjif) && !rrpriv->fw_running)
 697                 cpu_relax();
 698
 699         netif_start_queue(dev);
 700
 701         return ecode;
 702
 703  error:
 704         /*
 705          * We might have gotten here because we are out of memory,
 706          * make sure we release everything we allocated before failing
 707          */
 708         for (i = 0; i < RX_RING_ENTRIES; i++) {
 709                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
 710
 711                 if (skb) {
 712                         pci_unmap_single(rrpriv->pci_dev,
 713                                          rrpriv->rx_ring[i].addr.addrlo,
 714                                          dev->mtu + HIPPI_HLEN,
 715                                          PCI_DMA_FROMDEVICE);
 716                         rrpriv->rx_ring[i].size = 0;
 717                         set_rraddr(&rrpriv->rx_ring[i].addr, 0);
 718                         dev_kfree_skb(skb);
 719                         rrpriv->rx_skbuff[i] = NULL;
 720                 }
 721         }
 722         return ecode;
 723 }
 724
 725
 726 /*
 727  * All events are considered to be slow (RX/TX ints do not generate
 728  * events) and are handled here, outside the main interrupt handler,
 729  * to reduce the size of the handler.
 730  */
 731 static u32 rr_handle_event(struct net_device *dev, u32 prodidx, u32 eidx)
 732 {
 733         struct rr_private *rrpriv;
 734         struct rr_regs __iomem *regs;
 735         u32 tmp;
 736
 737         rrpriv = netdev_priv(dev);
 738         regs = rrpriv->regs;
 739
 740         while (prodidx != eidx){
 741                 switch (rrpriv->evt_ring[eidx].code){
 742                 case E_NIC_UP:
 743                         tmp = readl(&regs->FwRev);
 744                         printk(KERN_INFO "%s: Firmware revision %i.%i.%i "
 745                                "up and running\n", dev->name,
 746                                (tmp >> 16), ((tmp >> 8) & 0xff), (tmp & 0xff));
 747                         rrpriv->fw_running = 1;
 748                         writel(RX_RING_ENTRIES - 1, &regs->IpRxPi);
 749                         wmb();
 750                         break;
 751                 case E_LINK_ON:
 752                         printk(KERN_INFO "%s: Optical link ON\n", dev->name);
 753                         break;
 754                 case E_LINK_OFF:
 755                         printk(KERN_INFO "%s: Optical link OFF\n", dev->name);
 756                         break;
 757                 case E_RX_IDLE:
 758                         printk(KERN_WARNING "%s: RX data not moving\n",
 759                                dev->name);
 760                         goto drop;
 761                 case E_WATCHDOG:
 762                         printk(KERN_INFO "%s: The watchdog is here to see "
 763                                "us\n", dev->name);
 764                         break;
 765                 case E_INTERN_ERR:
 766                         printk(KERN_ERR "%s: HIPPI Internal NIC error\n",
 767                                dev->name);
 768                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 769                                &regs->HostCtrl);
 770                         wmb();
 771                         break;
 772                 case E_HOST_ERR:
 773                         printk(KERN_ERR "%s: Host software error\n",
 774                                dev->name);
 775                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 776                                &regs->HostCtrl);
 777                         wmb();
 778                         break;
 779                 /*
 780                  * TX events.
 781                  */
 782                 case E_CON_REJ:
 783                         printk(KERN_WARNING "%s: Connection rejected\n",
 784                                dev->name);
 785                         dev->stats.tx_aborted_errors++;
 786                         break;
 787                 case E_CON_TMOUT:
 788                         printk(KERN_WARNING "%s: Connection timeout\n",
 789                                dev->name);
 790                         break;
 791                 case E_DISC_ERR:
 792                         printk(KERN_WARNING "%s: HIPPI disconnect error\n",
 793                                dev->name);
 794                         dev->stats.tx_aborted_errors++;
 795                         break;
 796                 case E_INT_PRTY:
 797                         printk(KERN_ERR "%s: HIPPI Internal Parity error\n",
 798                                dev->name);
 799                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 800                                &regs->HostCtrl);
 801                         wmb();
 802                         break;
 803                 case E_TX_IDLE:
 804                         printk(KERN_WARNING "%s: Transmitter idle\n",
 805                                dev->name);
 806                         break;
 807                 case E_TX_LINK_DROP:
 808                         printk(KERN_WARNING "%s: Link lost during transmit\n",
 809                                dev->name);
 810                         dev->stats.tx_aborted_errors++;
 811                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 812                                &regs->HostCtrl);
 813                         wmb();
 814                         break;
 815                 case E_TX_INV_RNG:
 816                         printk(KERN_ERR "%s: Invalid send ring block\n",
 817                                dev->name);
 818                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 819                                &regs->HostCtrl);
 820                         wmb();
 821                         break;
 822                 case E_TX_INV_BUF:
 823                         printk(KERN_ERR "%s: Invalid send buffer address\n",
 824                                dev->name);
 825                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 826                                &regs->HostCtrl);
 827                         wmb();
 828                         break;
 829                 case E_TX_INV_DSC:
 830                         printk(KERN_ERR "%s: Invalid descriptor address\n",
 831                                dev->name);
 832                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 833                                &regs->HostCtrl);
 834                         wmb();
 835                         break;
 836                 /*
 837                  * RX events.
 838                  */
 839                 case E_RX_RNG_OUT:
 840                         printk(KERN_INFO "%s: Receive ring full\n", dev->name);
 841                         break;
 842
 843                 case E_RX_PAR_ERR:
 844                         printk(KERN_WARNING "%s: Receive parity error\n",
 845                                dev->name);
 846                         goto drop;
 847                 case E_RX_LLRC_ERR:
 848                         printk(KERN_WARNING "%s: Receive LLRC error\n",
 849                                dev->name);
 850                         goto drop;
 851                 case E_PKT_LN_ERR:
 852                         printk(KERN_WARNING "%s: Receive packet length "
 853                                "error\n", dev->name);
 854                         goto drop;
 855                 case E_DTA_CKSM_ERR:
 856                         printk(KERN_WARNING "%s: Data checksum error\n",
 857                                dev->name);
 858                         goto drop;
 859                 case E_SHT_BST:
 860                         printk(KERN_WARNING "%s: Unexpected short burst "
 861                                "error\n", dev->name);
 862                         goto drop;
 863                 case E_STATE_ERR:
 864                         printk(KERN_WARNING "%s: Recv. state transition"
 865                                " error\n", dev->name);
 866                         goto drop;
 867                 case E_UNEXP_DATA:
 868                         printk(KERN_WARNING "%s: Unexpected data error\n",
 869                                dev->name);
 870                         goto drop;
 871                 case E_LST_LNK_ERR:
 872                         printk(KERN_WARNING "%s: Link lost error\n",
 873                                dev->name);
 874                         goto drop;
 875                 case E_FRM_ERR:
 876                         printk(KERN_WARNING "%s: Framming Error\n",
 877                                dev->name);
 878                         goto drop;
 879                 case E_FLG_SYN_ERR:
 880                         printk(KERN_WARNING "%s: Flag sync. lost during "
 881                                "packet\n", dev->name);
 882                         goto drop;
 883                 case E_RX_INV_BUF:
 884                         printk(KERN_ERR "%s: Invalid receive buffer "
 885                                "address\n", dev->name);
 886                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 887                                &regs->HostCtrl);
 888                         wmb();
 889                         break;
 890                 case E_RX_INV_DSC:
 891                         printk(KERN_ERR "%s: Invalid receive descriptor "
 892                                "address\n", dev->name);
 893                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 894                                &regs->HostCtrl);
 895                         wmb();
 896                         break;
 897                 case E_RNG_BLK:
 898                         printk(KERN_ERR "%s: Invalid ring block\n",
 899                                dev->name);
 900                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 901                                &regs->HostCtrl);
 902                         wmb();
 903                         break;
 904                 drop:
 905                         /* Label packet to be dropped.
 906                          * Actual dropping occurs in rx
 907                          * handling.
 908                          *
 909                          * The index of packet we get to drop is
 910                          * the index of the packet following
 911                          * the bad packet. -kbf
 912                          */
 913                         {
 914                                 u16 index = rrpriv->evt_ring[eidx].index;
 915                                 index = (index + (RX_RING_ENTRIES - 1)) %
 916                                         RX_RING_ENTRIES;
 917                                 rrpriv->rx_ring[index].mode |=
 918                                         (PACKET_BAD | PACKET_END);
 919                         }
 920                         break;
 921                 default:
 922                         printk(KERN_WARNING "%s: Unhandled event 0x%02x\n",
 923                                dev->name, rrpriv->evt_ring[eidx].code);
 924                 }
 925                 eidx = (eidx + 1) % EVT_RING_ENTRIES;
 926         }
 927
 928         rrpriv->info->evt_ctrl.pi = eidx;
 929         wmb();
 930         return eidx;
 931 }
 932
 933
 934 static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
 935 {
 936         struct rr_private *rrpriv = netdev_priv(dev);
 937         struct rr_regs __iomem *regs = rrpriv->regs;
 938
 939         do {
 940                 struct rx_desc *desc;
 941                 u32 pkt_len;
 942
 943                 desc = &(rrpriv->rx_ring[index]);
 944                 pkt_len = desc->size;
 945 #if (DEBUG > 2)
 946                 printk("index %i, rxlimit %i\n", index, rxlimit);
 947                 printk("len %x, mode %x\n", pkt_len, desc->mode);
 948 #endif
 949                 if ( (rrpriv->rx_ring[index].mode & PACKET_BAD) == PACKET_BAD){
 950                         dev->stats.rx_dropped++;
 951                         goto defer;
 952                 }
 953
 954                 if (pkt_len > 0){
 955                         struct sk_buff *skb, *rx_skb;
 956
 957                         rx_skb = rrpriv->rx_skbuff[index];
 958
 959                         if (pkt_len < PKT_COPY_THRESHOLD) {
 960                                 skb = alloc_skb(pkt_len, GFP_ATOMIC);
 961                                 if (skb == NULL){
 962                                         printk(KERN_WARNING "%s: Unable to allocate skb (%i bytes), deferring packet\n", dev->name, pkt_len);
 963                                         dev->stats.rx_dropped++;
 964                                         goto defer;
 965                                 } else {
 966                                         pci_dma_sync_single_for_cpu(rrpriv->pci_dev,
 967                                                                     desc->addr.addrlo,
 968                                                                     pkt_len,
 969                                                                     PCI_DMA_FROMDEVICE);
 970
 971                                         memcpy(skb_put(skb, pkt_len),
 972                                                rx_skb->data, pkt_len);
 973
 974                                         pci_dma_sync_single_for_device(rrpriv->pci_dev,
 975                                                                        desc->addr.addrlo,
 976                                                                        pkt_len,
 977                                                                        PCI_DMA_FROMDEVICE);
 978                                 }
 979                         }else{
 980                                 struct sk_buff *newskb;
 981
 982                                 newskb = alloc_skb(dev->mtu + HIPPI_HLEN,
 983                                         GFP_ATOMIC);
 984                                 if (newskb){
 985                                         dma_addr_t addr;
 986
 987                                         pci_unmap_single(rrpriv->pci_dev,
 988                                                 desc->addr.addrlo, dev->mtu +
 989                                                 HIPPI_HLEN, PCI_DMA_FROMDEVICE);
 990                                         skb = rx_skb;
 991                                         skb_put(skb, pkt_len);
 992                                         rrpriv->rx_skbuff[index] = newskb;
 993                                         addr = pci_map_single(rrpriv->pci_dev,
 994                                                 newskb->data,
 995                                                 dev->mtu + HIPPI_HLEN,
 996                                                 PCI_DMA_FROMDEVICE);
 997                                         set_rraddr(&desc->addr, addr);
 998                                 } else {
 999                                         printk("%s: Out of memory, deferring "
1000                                                "packet\n", dev->name);
1001                                         dev->stats.rx_dropped++;
1002                                         goto defer;
1003                                 }
1004                         }
1005                         skb->protocol = hippi_type_trans(skb, dev);
1006
1007                         netif_rx(skb);          /* send it up */
1008
1009                         dev->last_rx = jiffies;
1010                         dev->stats.rx_packets++;
1011                         dev->stats.rx_bytes += pkt_len;
1012                 }
1013         defer:
1014                 desc->mode = 0;
1015                 desc->size = dev->mtu + HIPPI_HLEN;
1016
1017                 if ((index & 7) == 7)
1018                         writel(index, &regs->IpRxPi);
1019
1020                 index = (index + 1) % RX_RING_ENTRIES;
1021         } while(index != rxlimit);
1022
1023         rrpriv->cur_rx = index;
1024         wmb();
1025 }
1026
1027
1028 static irqreturn_t rr_interrupt(int irq, void *dev_id)
1029 {
1030         struct rr_private *rrpriv;
1031         struct rr_regs __iomem *regs;
1032         struct net_device *dev = (struct net_device *)dev_id;
1033         u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon;
1034
1035         rrpriv = netdev_priv(dev);
1036         regs = rrpriv->regs;
1037
1038         if (!(readl(&regs->HostCtrl) & RR_INT))
1039                 return IRQ_NONE;
1040
1041         spin_lock(&rrpriv->lock);
1042
1043         prodidx = readl(&regs->EvtPrd);
1044         txcsmr = (prodidx >> 8) & 0xff;
1045         rxlimit = (prodidx >> 16) & 0xff;
1046         prodidx &= 0xff;
1047
1048 #if (DEBUG > 2)
1049         printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name,
1050                prodidx, rrpriv->info->evt_ctrl.pi);
1051 #endif
1052         /*
1053          * Order here is important.  We must handle events
1054          * before doing anything else in order to catch
1055          * such things as LLRC errors, etc -kbf
1056          */
1057
1058         eidx = rrpriv->info->evt_ctrl.pi;
1059         if (prodidx != eidx)
1060                 eidx = rr_handle_event(dev, prodidx, eidx);
1061
1062         rxindex = rrpriv->cur_rx;
1063         if (rxindex != rxlimit)
1064                 rx_int(dev, rxlimit, rxindex);
1065
1066         txcon = rrpriv->dirty_tx;
1067         if (txcsmr != txcon) {
1068                 do {
1069                         /* Due to occational firmware TX producer/consumer out
1070                          * of sync. error need to check entry in ring -kbf
1071                          */
1072                         if(rrpriv->tx_skbuff[txcon]){
1073                                 struct tx_desc *desc;
1074                                 struct sk_buff *skb;
1075
1076                                 desc = &(rrpriv->tx_ring[txcon]);
1077                                 skb = rrpriv->tx_skbuff[txcon];
1078
1079                                 dev->stats.tx_packets++;
1080                                 dev->stats.tx_bytes += skb->len;
1081
1082                                 pci_unmap_single(rrpriv->pci_dev,
1083                                                  desc->addr.addrlo, skb->len,
1084                                                  PCI_DMA_TODEVICE);
1085                                 dev_kfree_skb_irq(skb);
1086
1087                                 rrpriv->tx_skbuff[txcon] = NULL;
1088                                 desc->size = 0;
1089                                 set_rraddr(&rrpriv->tx_ring[txcon].addr, 0);
1090                                 desc->mode = 0;
1091                         }
1092                         txcon = (txcon + 1) % TX_RING_ENTRIES;
1093                 } while (txcsmr != txcon);
1094                 wmb();
1095
1096                 rrpriv->dirty_tx = txcon;
1097                 if (rrpriv->tx_full && rr_if_busy(dev) &&
1098                     (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES)
1099                      != rrpriv->dirty_tx)){
1100                         rrpriv->tx_full = 0;
1101                         netif_wake_queue(dev);
1102                 }
1103         }
1104
1105         eidx |= ((txcsmr << 8) | (rxlimit << 16));
1106         writel(eidx, &regs->EvtCon);
1107         wmb();
1108
1109         spin_unlock(&rrpriv->lock);
1110         return IRQ_HANDLED;
1111 }
1112
1113 static inline void rr_raz_tx(struct rr_private *rrpriv,
1114                              struct net_device *dev)
1115 {
1116         int i;
1117
1118         for (i = 0; i < TX_RING_ENTRIES; i++) {
1119                 struct sk_buff *skb = rrpriv->tx_skbuff[i];
1120
1121                 if (skb) {
1122                         struct tx_desc *desc = &(rrpriv->tx_ring[i]);
1123
1124                         pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1125                                 skb->len, PCI_DMA_TODEVICE);
1126                         desc->size = 0;
1127                         set_rraddr(&desc->addr, 0);
1128                         dev_kfree_skb(skb);
1129                         rrpriv->tx_skbuff[i] = NULL;
1130                 }
1131         }
1132 }
1133
1134
1135 static inline void rr_raz_rx(struct rr_private *rrpriv,
1136                              struct net_device *dev)
1137 {
1138         int i;
1139
1140         for (i = 0; i < RX_RING_ENTRIES; i++) {
1141                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
1142
1143                 if (skb) {
1144                         struct rx_desc *desc = &(rrpriv->rx_ring[i]);
1145
1146                         pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1147                                 dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
1148                         desc->size = 0;
1149                         set_rraddr(&desc->addr, 0);
1150                         dev_kfree_skb(skb);
1151                         rrpriv->rx_skbuff[i] = NULL;
1152                 }
1153         }
1154 }
1155
1156 static void rr_timer(unsigned long data)
1157 {
1158         struct net_device *dev = (struct net_device *)data;
1159         struct rr_private *rrpriv = netdev_priv(dev);
1160         struct rr_regs __iomem *regs = rrpriv->regs;
1161         unsigned long flags;
1162
1163         if (readl(&regs->HostCtrl) & NIC_HALTED){
1164                 printk("%s: Restarting nic\n", dev->name);
1165                 memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl));
1166                 memset(rrpriv->info, 0, sizeof(struct rr_info));
1167                 wmb();
1168
1169                 rr_raz_tx(rrpriv, dev);
1170                 rr_raz_rx(rrpriv, dev);
1171
1172                 if (rr_init1(dev)) {
1173                         spin_lock_irqsave(&rrpriv->lock, flags);
1174                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
1175                                &regs->HostCtrl);
1176                         spin_unlock_irqrestore(&rrpriv->lock, flags);
1177                 }
1178         }
1179         rrpriv->timer.expires = RUN_AT(5*HZ);
1180         add_timer(&rrpriv->timer);
1181 }
1182
1183
1184 static int rr_open(struct net_device *dev)
1185 {
1186         struct rr_private *rrpriv = netdev_priv(dev);
1187         struct pci_dev *pdev = rrpriv->pci_dev;
1188         struct rr_regs __iomem *regs;
1189         int ecode = 0;
1190         unsigned long flags;
1191         dma_addr_t dma_addr;
1192
1193         regs = rrpriv->regs;
1194
1195         if (rrpriv->fw_rev < 0x00020000) {
1196                 printk(KERN_WARNING "%s: trying to configure device with "
1197                        "obsolete firmware\n", dev->name);
1198                 ecode = -EBUSY;
1199                 goto error;
1200         }
1201
1202         rrpriv->rx_ctrl = pci_alloc_consistent(pdev,
1203                                                256 * sizeof(struct ring_ctrl),
1204                                                &dma_addr);
1205         if (!rrpriv->rx_ctrl) {
1206                 ecode = -ENOMEM;
1207                 goto error;
1208         }
1209         rrpriv->rx_ctrl_dma = dma_addr;
1210         memset(rrpriv->rx_ctrl, 0, 256*sizeof(struct ring_ctrl));
1211
1212         rrpriv->info = pci_alloc_consistent(pdev, sizeof(struct rr_info),
1213                                             &dma_addr);
1214         if (!rrpriv->info) {
1215                 ecode = -ENOMEM;
1216                 goto error;
1217         }
1218         rrpriv->info_dma = dma_addr;
1219         memset(rrpriv->info, 0, sizeof(struct rr_info));
1220         wmb();
1221
1222         spin_lock_irqsave(&rrpriv->lock, flags);
1223         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1224         readl(&regs->HostCtrl);
1225         spin_unlock_irqrestore(&rrpriv->lock, flags);
1226
1227         if (request_irq(dev->irq, rr_interrupt, IRQF_SHARED, dev->name, dev)) {
1228                 printk(KERN_WARNING "%s: Requested IRQ %d is busy\n",
1229                        dev->name, dev->irq);
1230                 ecode = -EAGAIN;
1231                 goto error;
1232         }
1233
1234         if ((ecode = rr_init1(dev)))
1235                 goto error;
1236
1237         /* Set the timer to switch to check for link beat and perhaps switch
1238            to an alternate media type. */
1239         init_timer(&rrpriv->timer);
1240         rrpriv->timer.expires = RUN_AT(5*HZ);           /* 5 sec. watchdog */
1241         rrpriv->timer.data = (unsigned long)dev;
1242         rrpriv->timer.function = &rr_timer;               /* timer handler */
1243         add_timer(&rrpriv->timer);
1244
1245         netif_start_queue(dev);
1246
1247         return ecode;
1248
1249  error:
1250         spin_lock_irqsave(&rrpriv->lock, flags);
1251         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1252         spin_unlock_irqrestore(&rrpriv->lock, flags);
1253
1254         if (rrpriv->info) {
1255                 pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
1256                                     rrpriv->info_dma);
1257                 rrpriv->info = NULL;
1258         }
1259         if (rrpriv->rx_ctrl) {
1260                 pci_free_consistent(pdev, sizeof(struct ring_ctrl),
1261                                     rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1262                 rrpriv->rx_ctrl = NULL;
1263         }
1264
1265         netif_stop_queue(dev);
1266
1267         return ecode;
1268 }
1269
1270
1271 static void rr_dump(struct net_device *dev)
1272 {
1273         struct rr_private *rrpriv;
1274         struct rr_regs __iomem *regs;
1275         u32 index, cons;
1276         short i;
1277         int len;
1278
1279         rrpriv = netdev_priv(dev);
1280         regs = rrpriv->regs;
1281
1282         printk("%s: dumping NIC TX rings\n", dev->name);
1283
1284         printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n",
1285                readl(&regs->RxPrd), readl(&regs->TxPrd),
1286                readl(&regs->EvtPrd), readl(&regs->TxPi),
1287                rrpriv->info->tx_ctrl.pi);
1288
1289         printk("Error code 0x%x\n", readl(&regs->Fail1));
1290
1291         index = (((readl(&regs->EvtPrd) >> 8) & 0xff ) - 1) % EVT_RING_ENTRIES;
1292         cons = rrpriv->dirty_tx;
1293         printk("TX ring index %i, TX consumer %i\n",
1294                index, cons);
1295
1296         if (rrpriv->tx_skbuff[index]){
1297                 len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len);
1298                 printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size);
1299                 for (i = 0; i < len; i++){
1300                         if (!(i & 7))
1301                                 printk("\n");
1302                         printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]);
1303                 }
1304                 printk("\n");
1305         }
1306
1307         if (rrpriv->tx_skbuff[cons]){
1308                 len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len);
1309                 printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len);
1310                 printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %08lx, truesize 0x%x\n",
1311                        rrpriv->tx_ring[cons].mode,
1312                        rrpriv->tx_ring[cons].size,
1313                        (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo,
1314                        (unsigned long)rrpriv->tx_skbuff[cons]->data,
1315                        (unsigned int)rrpriv->tx_skbuff[cons]->truesize);
1316                 for (i = 0; i < len; i++){
1317                         if (!(i & 7))
1318                                 printk("\n");
1319                         printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size);
1320                 }
1321                 printk("\n");
1322         }
1323
1324         printk("dumping TX ring info:\n");
1325         for (i = 0; i < TX_RING_ENTRIES; i++)
1326                 printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n",
1327                        rrpriv->tx_ring[i].mode,
1328                        rrpriv->tx_ring[i].size,
1329                        (unsigned long long) rrpriv->tx_ring[i].addr.addrlo);
1330
1331 }
1332
1333
1334 static int rr_close(struct net_device *dev)
1335 {
1336         struct rr_private *rrpriv;
1337         struct rr_regs __iomem *regs;
1338         unsigned long flags;
1339         u32 tmp;
1340         short i;
1341
1342         netif_stop_queue(dev);
1343
1344         rrpriv = netdev_priv(dev);
1345         regs = rrpriv->regs;
1346
1347         /*
1348          * Lock to make sure we are not cleaning up while another CPU
1349          * is handling interrupts.
1350          */
1351         spin_lock_irqsave(&rrpriv->lock, flags);
1352
1353         tmp = readl(&regs->HostCtrl);
1354         if (tmp & NIC_HALTED){
1355                 printk("%s: NIC already halted\n", dev->name);
1356                 rr_dump(dev);
1357         }else{
1358                 tmp |= HALT_NIC | RR_CLEAR_INT;
1359                 writel(tmp, &regs->HostCtrl);
1360                 readl(&regs->HostCtrl);
1361         }
1362
1363         rrpriv->fw_running = 0;
1364
1365         del_timer_sync(&rrpriv->timer);
1366
1367         writel(0, &regs->TxPi);
1368         writel(0, &regs->IpRxPi);
1369
1370         writel(0, &regs->EvtCon);
1371         writel(0, &regs->EvtPrd);
1372
1373         for (i = 0; i < CMD_RING_ENTRIES; i++)
1374                 writel(0, &regs->CmdRing[i]);
1375
1376         rrpriv->info->tx_ctrl.entries = 0;
1377         rrpriv->info->cmd_ctrl.pi = 0;
1378         rrpriv->info->evt_ctrl.pi = 0;
1379         rrpriv->rx_ctrl[4].entries = 0;
1380
1381         rr_raz_tx(rrpriv, dev);
1382         rr_raz_rx(rrpriv, dev);
1383
1384         pci_free_consistent(rrpriv->pci_dev, 256 * sizeof(struct ring_ctrl),
1385                             rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1386         rrpriv->rx_ctrl = NULL;
1387
1388         pci_free_consistent(rrpriv->pci_dev, sizeof(struct rr_info),
1389                             rrpriv->info, rrpriv->info_dma);
1390         rrpriv->info = NULL;
1391
1392         free_irq(dev->irq, dev);
1393         spin_unlock_irqrestore(&rrpriv->lock, flags);
1394
1395         return 0;
1396 }
1397
1398
1399 static int rr_start_xmit(struct sk_buff *skb, struct net_device *dev)
1400 {
1401         struct rr_private *rrpriv = netdev_priv(dev);
1402         struct rr_regs __iomem *regs = rrpriv->regs;
1403         struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
1404         struct ring_ctrl *txctrl;
1405         unsigned long flags;
1406         u32 index, len = skb->len;
1407         u32 *ifield;
1408         struct sk_buff *new_skb;
1409
1410         if (readl(&regs->Mode) & FATAL_ERR)
1411                 printk("error codes Fail1 %02x, Fail2 %02x\n",
1412                        readl(&regs->Fail1), readl(&regs->Fail2));
1413
1414         /*
1415          * We probably need to deal with tbusy here to prevent overruns.
1416          */
1417
1418         if (skb_headroom(skb) < 8){
1419                 printk("incoming skb too small - reallocating\n");
1420                 if (!(new_skb = dev_alloc_skb(len + 8))) {
1421                         dev_kfree_skb(skb);
1422                         netif_wake_queue(dev);
1423                         return -EBUSY;
1424                 }
1425                 skb_reserve(new_skb, 8);
1426                 skb_put(new_skb, len);
1427                 skb_copy_from_linear_data(skb, new_skb->data, len);
1428                 dev_kfree_skb(skb);
1429                 skb = new_skb;
1430         }
1431
1432         ifield = (u32 *)skb_push(skb, 8);
1433
1434         ifield[0] = 0;
1435         ifield[1] = hcb->ifield;
1436
1437         /*
1438          * We don't need the lock before we are actually going to start
1439          * fiddling with the control blocks.
1440          */
1441         spin_lock_irqsave(&rrpriv->lock, flags);
1442
1443         txctrl = &rrpriv->info->tx_ctrl;
1444
1445         index = txctrl->pi;
1446
1447         rrpriv->tx_skbuff[index] = skb;
1448         set_rraddr(&rrpriv->tx_ring[index].addr, pci_map_single(
1449                 rrpriv->pci_dev, skb->data, len + 8, PCI_DMA_TODEVICE));
1450         rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */
1451         rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END;
1452         txctrl->pi = (index + 1) % TX_RING_ENTRIES;
1453         wmb();
1454         writel(txctrl->pi, &regs->TxPi);
1455
1456         if (txctrl->pi == rrpriv->dirty_tx){
1457                 rrpriv->tx_full = 1;
1458                 netif_stop_queue(dev);
1459         }
1460
1461         spin_unlock_irqrestore(&rrpriv->lock, flags);
1462
1463         dev->trans_start = jiffies;
1464         return 0;
1465 }
1466
1467
1468 /*
1469  * Read the firmware out of the EEPROM and put it into the SRAM
1470  * (or from user space - later)
1471  *
1472  * This operation requires the NIC to be halted and is performed with
1473  * interrupts disabled and with the spinlock hold.
1474  */
1475 static int rr_load_firmware(struct net_device *dev)
1476 {
1477         struct rr_private *rrpriv;
1478         struct rr_regs __iomem *regs;
1479         size_t eptr, segptr;
1480         int i, j;
1481         u32 localctrl, sptr, len, tmp;
1482         u32 p2len, p2size, nr_seg, revision, io, sram_size;
1483
1484         rrpriv = netdev_priv(dev);
1485         regs = rrpriv->regs;
1486
1487         if (dev->flags & IFF_UP)
1488                 return -EBUSY;
1489
1490         if (!(readl(&regs->HostCtrl) & NIC_HALTED)){
1491                 printk("%s: Trying to load firmware to a running NIC.\n",
1492                        dev->name);
1493                 return -EBUSY;
1494         }
1495
1496         localctrl = readl(&regs->LocalCtrl);
1497         writel(0, &regs->LocalCtrl);
1498
1499         writel(0, &regs->EvtPrd);
1500         writel(0, &regs->RxPrd);
1501         writel(0, &regs->TxPrd);
1502
1503         /*
1504          * First wipe the entire SRAM, otherwise we might run into all
1505          * kinds of trouble ... sigh, this took almost all afternoon
1506          * to track down ;-(
1507          */
1508         io = readl(&regs->ExtIo);
1509         writel(0, &regs->ExtIo);
1510         sram_size = rr_read_eeprom_word(rrpriv, 8);
1511
1512         for (i = 200; i < sram_size / 4; i++){
1513                 writel(i * 4, &regs->WinBase);
1514                 mb();
1515                 writel(0, &regs->WinData);
1516                 mb();
1517         }
1518         writel(io, &regs->ExtIo);
1519         mb();
1520
1521         eptr = rr_read_eeprom_word(rrpriv,
1522                        offsetof(struct eeprom, rncd_info.AddrRunCodeSegs));
1523         eptr = ((eptr & 0x1fffff) >> 3);
1524
1525         p2len = rr_read_eeprom_word(rrpriv, 0x83*4);
1526         p2len = (p2len << 2);
1527         p2size = rr_read_eeprom_word(rrpriv, 0x84*4);
1528         p2size = ((p2size & 0x1fffff) >> 3);
1529
1530         if ((eptr < p2size) || (eptr > (p2size + p2len))){
1531                 printk("%s: eptr is invalid\n", dev->name);
1532                 goto out;
1533         }
1534
1535         revision = rr_read_eeprom_word(rrpriv,
1536                         offsetof(struct eeprom, manf.HeaderFmt));
1537
1538         if (revision != 1){
1539                 printk("%s: invalid firmware format (%i)\n",
1540                        dev->name, revision);
1541                 goto out;
1542         }
1543
1544         nr_seg = rr_read_eeprom_word(rrpriv, eptr);
1545         eptr +=4;
1546 #if (DEBUG > 1)
1547         printk("%s: nr_seg %i\n", dev->name, nr_seg);
1548 #endif
1549
1550         for (i = 0; i < nr_seg; i++){
1551                 sptr = rr_read_eeprom_word(rrpriv, eptr);
1552                 eptr += 4;
1553                 len = rr_read_eeprom_word(rrpriv, eptr);
1554                 eptr += 4;
1555                 segptr = rr_read_eeprom_word(rrpriv, eptr);
1556                 segptr = ((segptr & 0x1fffff) >> 3);
1557                 eptr += 4;
1558 #if (DEBUG > 1)
1559                 printk("%s: segment %i, sram address %06x, length %04x, segptr %06x\n",
1560                        dev->name, i, sptr, len, segptr);
1561 #endif
1562                 for (j = 0; j < len; j++){
1563                         tmp = rr_read_eeprom_word(rrpriv, segptr);
1564                         writel(sptr, &regs->WinBase);
1565                         mb();
1566                         writel(tmp, &regs->WinData);
1567                         mb();
1568                         segptr += 4;
1569                         sptr += 4;
1570                 }
1571         }
1572
1573 out:
1574         writel(localctrl, &regs->LocalCtrl);
1575         mb();
1576         return 0;
1577 }
1578
1579
1580 static int rr_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1581 {
1582         struct rr_private *rrpriv;
1583         unsigned char *image, *oldimage;
1584         unsigned long flags;
1585         unsigned int i;
1586         int error = -EOPNOTSUPP;
1587
1588         rrpriv = netdev_priv(dev);
1589
1590         switch(cmd){
1591         case SIOCRRGFW:
1592                 if (!capable(CAP_SYS_RAWIO)){
1593                         return -EPERM;
1594                 }
1595
1596                 image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1597                 if (!image){
1598                         printk(KERN_ERR "%s: Unable to allocate memory "
1599                                "for EEPROM image\n", dev->name);
1600                         return -ENOMEM;
1601                 }
1602
1603
1604                 if (rrpriv->fw_running){
1605                         printk("%s: Firmware already running\n", dev->name);
1606                         error = -EPERM;
1607                         goto gf_out;
1608                 }
1609
1610                 spin_lock_irqsave(&rrpriv->lock, flags);
1611                 i = rr_read_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1612                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1613                 if (i != EEPROM_BYTES){
1614                         printk(KERN_ERR "%s: Error reading EEPROM\n",
1615                                dev->name);
1616                         error = -EFAULT;
1617                         goto gf_out;
1618                 }
1619                 error = copy_to_user(rq->ifr_data, image, EEPROM_BYTES);
1620                 if (error)
1621                         error = -EFAULT;
1622         gf_out:
1623                 kfree(image);
1624                 return error;
1625
1626         case SIOCRRPFW:
1627                 if (!capable(CAP_SYS_RAWIO)){
1628                         return -EPERM;
1629                 }
1630
1631                 image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1632                 oldimage = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1633                 if (!image || !oldimage) {
1634                         printk(KERN_ERR "%s: Unable to allocate memory "
1635                                "for EEPROM image\n", dev->name);
1636                         error = -ENOMEM;
1637                         goto wf_out;
1638                 }
1639
1640                 error = copy_from_user(image, rq->ifr_data, EEPROM_BYTES);
1641                 if (error) {
1642                         error = -EFAULT;
1643                         goto wf_out;
1644                 }
1645
1646                 if (rrpriv->fw_running){
1647                         printk("%s: Firmware already running\n", dev->name);
1648                         error = -EPERM;
1649                         goto wf_out;
1650                 }
1651
1652                 printk("%s: Updating EEPROM firmware\n", dev->name);
1653
1654                 spin_lock_irqsave(&rrpriv->lock, flags);
1655                 error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1656                 if (error)
1657                         printk(KERN_ERR "%s: Error writing EEPROM\n",
1658                                dev->name);
1659
1660                 i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES);
1661                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1662
1663                 if (i != EEPROM_BYTES)
1664                         printk(KERN_ERR "%s: Error reading back EEPROM "
1665                                "image\n", dev->name);
1666
1667                 error = memcmp(image, oldimage, EEPROM_BYTES);
1668                 if (error){
1669                         printk(KERN_ERR "%s: Error verifying EEPROM image\n",
1670                                dev->name);
1671                         error = -EFAULT;
1672                 }
1673         wf_out:
1674                 kfree(oldimage);
1675                 kfree(image);
1676                 return error;
1677
1678         case SIOCRRID:
1679                 return put_user(0x52523032, (int __user *)rq->ifr_data);
1680         default:
1681                 return error;
1682         }
1683 }
1684
1685 static struct pci_device_id rr_pci_tbl[] = {
1686         { PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER,
1687                 PCI_ANY_ID, PCI_ANY_ID, },
1688         { 0,}
1689 };
1690 MODULE_DEVICE_TABLE(pci, rr_pci_tbl);
1691
1692 static struct pci_driver rr_driver = {
1693         .name           = "rrunner",
1694         .id_table       = rr_pci_tbl,
1695         .probe          = rr_init_one,
1696         .remove         = __devexit_p(rr_remove_one),
1697 };
1698
1699 static int __init rr_init_module(void)
1700 {
1701         return pci_register_driver(&rr_driver);
1702 }
1703
1704 static void __exit rr_cleanup_module(void)
1705 {
1706         pci_unregister_driver(&rr_driver);
1707 }
1708
1709 module_init(rr_init_module);
1710 module_exit(rr_cleanup_module);
1711
1712 /*
1713  * Local variables:
1714  * compile-command: "gcc -D__KERNEL__ -I../../include -Wall -Wstrict-prototypes -O2 -pipe -fomit-frame-pointer -fno-strength-reduce -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DMODULE -DMODVERSIONS -include ../../include/linux/modversions.h -c rrunner.c"
1715  * End:
1716  */