drivers/net/hippi/rrunner.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * rrunner.c: Linux driver for the Essential RoadRunner HIPPI board.
   4  *
   5  * Copyright (C) 1998-2002 by Jes Sorensen, <jes@wildopensource.com>.
   6  *
   7  * Thanks to Essential Communication for providing us with hardware
   8  * and very comprehensive documentation without which I would not have
   9  * been able to write this driver. A special thank you to John Gibbon
  10  * for sorting out the legal issues, with the NDA, allowing the code to
  11  * be released under the GPL.
  12  *
  13  * Thanks to Jayaram Bhat from ODS/Essential for fixing some of the
  14  * stupid bugs in my code.
  15  *
  16  * Softnet support and various other patches from Val Henson of
  17  * ODS/Essential.
  18  *
  19  * PCI DMA mapping code partly based on work by Francois Romieu.
  20  */
  21
  22
  23 #define DEBUG 1
  24 #define RX_DMA_SKBUFF 1
  25 #define PKT_COPY_THRESHOLD 512
  26
  27 #include <linux/module.h>
  28 #include <linux/types.h>
  29 #include <linux/errno.h>
  30 #include <linux/ioport.h>
  31 #include <linux/pci.h>
  32 #include <linux/kernel.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/hippidevice.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/delay.h>
  37 #include <linux/mm.h>
  38 #include <linux/slab.h>
  39 #include <net/sock.h>
  40
  41 #include <asm/cache.h>
  42 #include <asm/byteorder.h>
  43 #include <asm/io.h>
  44 #include <asm/irq.h>
  45 #include <linux/uaccess.h>
  46
  47 #define rr_if_busy(dev)     netif_queue_stopped(dev)
  48 #define rr_if_running(dev)  netif_running(dev)
  49
  50 #include "rrunner.h"
  51
  52 #define RUN_AT(x) (jiffies + (x))
  53
  54
  55 MODULE_AUTHOR("Jes Sorensen <jes@wildopensource.com>");
  56 MODULE_DESCRIPTION("Essential RoadRunner HIPPI driver");
  57 MODULE_LICENSE("GPL");
  58
  59 static const char version[] =
  60 "rrunner.c: v0.50 11/11/2002  Jes Sorensen (jes@wildopensource.com)\n";
  61
  62
  63 static const struct net_device_ops rr_netdev_ops = {
  64         .ndo_open               = rr_open,
  65         .ndo_stop               = rr_close,
  66         .ndo_do_ioctl           = rr_ioctl,
  67         .ndo_start_xmit         = rr_start_xmit,
  68         .ndo_set_mac_address    = hippi_mac_addr,
  69 };
  70
  71 /*
  72  * Implementation notes:
  73  *
  74  * The DMA engine only allows for DMA within physical 64KB chunks of
  75  * memory. The current approach of the driver (and stack) is to use
  76  * linear blocks of memory for the skbuffs. However, as the data block
  77  * is always the first part of the skb and skbs are 2^n aligned so we
  78  * are guarantted to get the whole block within one 64KB align 64KB
  79  * chunk.
  80  *
  81  * On the long term, relying on being able to allocate 64KB linear
  82  * chunks of memory is not feasible and the skb handling code and the
  83  * stack will need to know about I/O vectors or something similar.
  84  */
  85
  86 static int rr_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  87 {
  88         struct net_device *dev;
  89         static int version_disp;
  90         u8 pci_latency;
  91         struct rr_private *rrpriv;
  92         void *tmpptr;
  93         dma_addr_t ring_dma;
  94         int ret = -ENOMEM;
  95
  96         dev = alloc_hippi_dev(sizeof(struct rr_private));
  97         if (!dev)
  98                 goto out3;
  99
 100         ret = pci_enable_device(pdev);
 101         if (ret) {
 102                 ret = -ENODEV;
 103                 goto out2;
 104         }
 105
 106         rrpriv = netdev_priv(dev);
 107
 108         SET_NETDEV_DEV(dev, &pdev->dev);
 109
 110         ret = pci_request_regions(pdev, "rrunner");
 111         if (ret < 0)
 112                 goto out;
 113
 114         pci_set_drvdata(pdev, dev);
 115
 116         rrpriv->pci_dev = pdev;
 117
 118         spin_lock_init(&rrpriv->lock);
 119
 120         dev->netdev_ops = &rr_netdev_ops;
 121
 122         /* display version info if adapter is found */
 123         if (!version_disp) {
 124                 /* set display flag to TRUE so that */
 125                 /* we only display this string ONCE */
 126                 version_disp = 1;
 127                 printk(version);
 128         }
 129
 130         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
 131         if (pci_latency <= 0x58){
 132                 pci_latency = 0x58;
 133                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, pci_latency);
 134         }
 135
 136         pci_set_master(pdev);
 137
 138         printk(KERN_INFO "%s: Essential RoadRunner serial HIPPI "
 139                "at 0x%llx, irq %i, PCI latency %i\n", dev->name,
 140                (unsigned long long)pci_resource_start(pdev, 0),
 141                pdev->irq, pci_latency);
 142
 143         /*
 144          * Remap the MMIO regs into kernel space.
 145          */
 146         rrpriv->regs = pci_iomap(pdev, 0, 0x1000);
 147         if (!rrpriv->regs) {
 148                 printk(KERN_ERR "%s:  Unable to map I/O register, "
 149                         "RoadRunner will be disabled.\n", dev->name);
 150                 ret = -EIO;
 151                 goto out;
 152         }
 153
 154         tmpptr = dma_alloc_coherent(&pdev->dev, TX_TOTAL_SIZE, &ring_dma,
 155                                     GFP_KERNEL);
 156         rrpriv->tx_ring = tmpptr;
 157         rrpriv->tx_ring_dma = ring_dma;
 158
 159         if (!tmpptr) {
 160                 ret = -ENOMEM;
 161                 goto out;
 162         }
 163
 164         tmpptr = dma_alloc_coherent(&pdev->dev, RX_TOTAL_SIZE, &ring_dma,
 165                                     GFP_KERNEL);
 166         rrpriv->rx_ring = tmpptr;
 167         rrpriv->rx_ring_dma = ring_dma;
 168
 169         if (!tmpptr) {
 170                 ret = -ENOMEM;
 171                 goto out;
 172         }
 173
 174         tmpptr = dma_alloc_coherent(&pdev->dev, EVT_RING_SIZE, &ring_dma,
 175                                     GFP_KERNEL);
 176         rrpriv->evt_ring = tmpptr;
 177         rrpriv->evt_ring_dma = ring_dma;
 178
 179         if (!tmpptr) {
 180                 ret = -ENOMEM;
 181                 goto out;
 182         }
 183
 184         /*
 185          * Don't access any register before this point!
 186          */
 187 #ifdef __BIG_ENDIAN
 188         writel(readl(&rrpriv->regs->HostCtrl) | NO_SWAP,
 189                 &rrpriv->regs->HostCtrl);
 190 #endif
 191         /*
 192          * Need to add a case for little-endian 64-bit hosts here.
 193          */
 194
 195         rr_init(dev);
 196
 197         ret = register_netdev(dev);
 198         if (ret)
 199                 goto out;
 200         return 0;
 201
 202  out:
 203         if (rrpriv->evt_ring)
 204                 dma_free_coherent(&pdev->dev, EVT_RING_SIZE, rrpriv->evt_ring,
 205                                   rrpriv->evt_ring_dma);
 206         if (rrpriv->rx_ring)
 207                 dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, rrpriv->rx_ring,
 208                                   rrpriv->rx_ring_dma);
 209         if (rrpriv->tx_ring)
 210                 dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, rrpriv->tx_ring,
 211                                   rrpriv->tx_ring_dma);
 212         if (rrpriv->regs)
 213                 pci_iounmap(pdev, rrpriv->regs);
 214         if (pdev)
 215                 pci_release_regions(pdev);
 216  out2:
 217         free_netdev(dev);
 218  out3:
 219         return ret;
 220 }
 221
 222 static void rr_remove_one(struct pci_dev *pdev)
 223 {
 224         struct net_device *dev = pci_get_drvdata(pdev);
 225         struct rr_private *rr = netdev_priv(dev);
 226
 227         if (!(readl(&rr->regs->HostCtrl) & NIC_HALTED)) {
 228                 printk(KERN_ERR "%s: trying to unload running NIC\n",
 229                        dev->name);
 230                 writel(HALT_NIC, &rr->regs->HostCtrl);
 231         }
 232
 233         unregister_netdev(dev);
 234         dma_free_coherent(&pdev->dev, EVT_RING_SIZE, rr->evt_ring,
 235                           rr->evt_ring_dma);
 236         dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, rr->rx_ring,
 237                           rr->rx_ring_dma);
 238         dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, rr->tx_ring,
 239                           rr->tx_ring_dma);
 240         pci_iounmap(pdev, rr->regs);
 241         pci_release_regions(pdev);
 242         pci_disable_device(pdev);
 243         free_netdev(dev);
 244 }
 245
 246
 247 /*
 248  * Commands are considered to be slow, thus there is no reason to
 249  * inline this.
 250  */
 251 static void rr_issue_cmd(struct rr_private *rrpriv, struct cmd *cmd)
 252 {
 253         struct rr_regs __iomem *regs;
 254         u32 idx;
 255
 256         regs = rrpriv->regs;
 257         /*
 258          * This is temporary - it will go away in the final version.
 259          * We probably also want to make this function inline.
 260          */
 261         if (readl(&regs->HostCtrl) & NIC_HALTED){
 262                 printk("issuing command for halted NIC, code 0x%x, "
 263                        "HostCtrl %08x\n", cmd->code, readl(&regs->HostCtrl));
 264                 if (readl(&regs->Mode) & FATAL_ERR)
 265                         printk("error codes Fail1 %02x, Fail2 %02x\n",
 266                                readl(&regs->Fail1), readl(&regs->Fail2));
 267         }
 268
 269         idx = rrpriv->info->cmd_ctrl.pi;
 270
 271         writel(*(u32*)(cmd), &regs->CmdRing[idx]);
 272         wmb();
 273
 274         idx = (idx - 1) % CMD_RING_ENTRIES;
 275         rrpriv->info->cmd_ctrl.pi = idx;
 276         wmb();
 277
 278         if (readl(&regs->Mode) & FATAL_ERR)
 279                 printk("error code %02x\n", readl(&regs->Fail1));
 280 }
 281
 282
 283 /*
 284  * Reset the board in a sensible manner. The NIC is already halted
 285  * when we get here and a spin-lock is held.
 286  */
 287 static int rr_reset(struct net_device *dev)
 288 {
 289         struct rr_private *rrpriv;
 290         struct rr_regs __iomem *regs;
 291         u32 start_pc;
 292         int i;
 293
 294         rrpriv = netdev_priv(dev);
 295         regs = rrpriv->regs;
 296
 297         rr_load_firmware(dev);
 298
 299         writel(0x01000000, &regs->TX_state);
 300         writel(0xff800000, &regs->RX_state);
 301         writel(0, &regs->AssistState);
 302         writel(CLEAR_INTA, &regs->LocalCtrl);
 303         writel(0x01, &regs->BrkPt);
 304         writel(0, &regs->Timer);
 305         writel(0, &regs->TimerRef);
 306         writel(RESET_DMA, &regs->DmaReadState);
 307         writel(RESET_DMA, &regs->DmaWriteState);
 308         writel(0, &regs->DmaWriteHostHi);
 309         writel(0, &regs->DmaWriteHostLo);
 310         writel(0, &regs->DmaReadHostHi);
 311         writel(0, &regs->DmaReadHostLo);
 312         writel(0, &regs->DmaReadLen);
 313         writel(0, &regs->DmaWriteLen);
 314         writel(0, &regs->DmaWriteLcl);
 315         writel(0, &regs->DmaWriteIPchecksum);
 316         writel(0, &regs->DmaReadLcl);
 317         writel(0, &regs->DmaReadIPchecksum);
 318         writel(0, &regs->PciState);
 319 #if (BITS_PER_LONG == 64) && defined __LITTLE_ENDIAN
 320         writel(SWAP_DATA | PTR64BIT | PTR_WD_SWAP, &regs->Mode);
 321 #elif (BITS_PER_LONG == 64)
 322         writel(SWAP_DATA | PTR64BIT | PTR_WD_NOSWAP, &regs->Mode);
 323 #else
 324         writel(SWAP_DATA | PTR32BIT | PTR_WD_NOSWAP, &regs->Mode);
 325 #endif
 326
 327 #if 0
 328         /*
 329          * Don't worry, this is just black magic.
 330          */
 331         writel(0xdf000, &regs->RxBase);
 332         writel(0xdf000, &regs->RxPrd);
 333         writel(0xdf000, &regs->RxCon);
 334         writel(0xce000, &regs->TxBase);
 335         writel(0xce000, &regs->TxPrd);
 336         writel(0xce000, &regs->TxCon);
 337         writel(0, &regs->RxIndPro);
 338         writel(0, &regs->RxIndCon);
 339         writel(0, &regs->RxIndRef);
 340         writel(0, &regs->TxIndPro);
 341         writel(0, &regs->TxIndCon);
 342         writel(0, &regs->TxIndRef);
 343         writel(0xcc000, &regs->pad10[0]);
 344         writel(0, &regs->DrCmndPro);
 345         writel(0, &regs->DrCmndCon);
 346         writel(0, &regs->DwCmndPro);
 347         writel(0, &regs->DwCmndCon);
 348         writel(0, &regs->DwCmndRef);
 349         writel(0, &regs->DrDataPro);
 350         writel(0, &regs->DrDataCon);
 351         writel(0, &regs->DrDataRef);
 352         writel(0, &regs->DwDataPro);
 353         writel(0, &regs->DwDataCon);
 354         writel(0, &regs->DwDataRef);
 355 #endif
 356
 357         writel(0xffffffff, &regs->MbEvent);
 358         writel(0, &regs->Event);
 359
 360         writel(0, &regs->TxPi);
 361         writel(0, &regs->IpRxPi);
 362
 363         writel(0, &regs->EvtCon);
 364         writel(0, &regs->EvtPrd);
 365
 366         rrpriv->info->evt_ctrl.pi = 0;
 367
 368         for (i = 0; i < CMD_RING_ENTRIES; i++)
 369                 writel(0, &regs->CmdRing[i]);
 370
 371 /*
 372  * Why 32 ? is this not cache line size dependent?
 373  */
 374         writel(RBURST_64|WBURST_64, &regs->PciState);
 375         wmb();
 376
 377         start_pc = rr_read_eeprom_word(rrpriv,
 378                         offsetof(struct eeprom, rncd_info.FwStart));
 379
 380 #if (DEBUG > 1)
 381         printk("%s: Executing firmware at address 0x%06x\n",
 382                dev->name, start_pc);
 383 #endif
 384
 385         writel(start_pc + 0x800, &regs->Pc);
 386         wmb();
 387         udelay(5);
 388
 389         writel(start_pc, &regs->Pc);
 390         wmb();
 391
 392         return 0;
 393 }
 394
 395
 396 /*
 397  * Read a string from the EEPROM.
 398  */
 399 static unsigned int rr_read_eeprom(struct rr_private *rrpriv,
 400                                 unsigned long offset,
 401                                 unsigned char *buf,
 402                                 unsigned long length)
 403 {
 404         struct rr_regs __iomem *regs = rrpriv->regs;
 405         u32 misc, io, host, i;
 406
 407         io = readl(&regs->ExtIo);
 408         writel(0, &regs->ExtIo);
 409         misc = readl(&regs->LocalCtrl);
 410         writel(0, &regs->LocalCtrl);
 411         host = readl(&regs->HostCtrl);
 412         writel(host | HALT_NIC, &regs->HostCtrl);
 413         mb();
 414
 415         for (i = 0; i < length; i++){
 416                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 417                 mb();
 418                 buf[i] = (readl(&regs->WinData) >> 24) & 0xff;
 419                 mb();
 420         }
 421
 422         writel(host, &regs->HostCtrl);
 423         writel(misc, &regs->LocalCtrl);
 424         writel(io, &regs->ExtIo);
 425         mb();
 426         return i;
 427 }
 428
 429
 430 /*
 431  * Shortcut to read one word (4 bytes) out of the EEPROM and convert
 432  * it to our CPU byte-order.
 433  */
 434 static u32 rr_read_eeprom_word(struct rr_private *rrpriv,
 435                             size_t offset)
 436 {
 437         __be32 word;
 438
 439         if ((rr_read_eeprom(rrpriv, offset,
 440                             (unsigned char *)&word, 4) == 4))
 441                 return be32_to_cpu(word);
 442         return 0;
 443 }
 444
 445
 446 /*
 447  * Write a string to the EEPROM.
 448  *
 449  * This is only called when the firmware is not running.
 450  */
 451 static unsigned int write_eeprom(struct rr_private *rrpriv,
 452                                  unsigned long offset,
 453                                  unsigned char *buf,
 454                                  unsigned long length)
 455 {
 456         struct rr_regs __iomem *regs = rrpriv->regs;
 457         u32 misc, io, data, i, j, ready, error = 0;
 458
 459         io = readl(&regs->ExtIo);
 460         writel(0, &regs->ExtIo);
 461         misc = readl(&regs->LocalCtrl);
 462         writel(ENABLE_EEPROM_WRITE, &regs->LocalCtrl);
 463         mb();
 464
 465         for (i = 0; i < length; i++){
 466                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 467                 mb();
 468                 data = buf[i] << 24;
 469                 /*
 470                  * Only try to write the data if it is not the same
 471                  * value already.
 472                  */
 473                 if ((readl(&regs->WinData) & 0xff000000) != data){
 474                         writel(data, &regs->WinData);
 475                         ready = 0;
 476                         j = 0;
 477                         mb();
 478                         while(!ready){
 479                                 udelay(20);
 480                                 if ((readl(&regs->WinData) & 0xff000000) ==
 481                                     data)
 482                                         ready = 1;
 483                                 mb();
 484                                 if (j++ > 5000){
 485                                         printk("data mismatch: %08x, "
 486                                                "WinData %08x\n", data,
 487                                                readl(&regs->WinData));
 488                                         ready = 1;
 489                                         error = 1;
 490                                 }
 491                         }
 492                 }
 493         }
 494
 495         writel(misc, &regs->LocalCtrl);
 496         writel(io, &regs->ExtIo);
 497         mb();
 498
 499         return error;
 500 }
 501
 502
 503 static int rr_init(struct net_device *dev)
 504 {
 505         struct rr_private *rrpriv;
 506         struct rr_regs __iomem *regs;
 507         u32 sram_size, rev;
 508
 509         rrpriv = netdev_priv(dev);
 510         regs = rrpriv->regs;
 511
 512         rev = readl(&regs->FwRev);
 513         rrpriv->fw_rev = rev;
 514         if (rev > 0x00020024)
 515                 printk("  Firmware revision: %i.%i.%i\n", (rev >> 16),
 516                        ((rev >> 8) & 0xff), (rev & 0xff));
 517         else if (rev >= 0x00020000) {
 518                 printk("  Firmware revision: %i.%i.%i (2.0.37 or "
 519                        "later is recommended)\n", (rev >> 16),
 520                        ((rev >> 8) & 0xff), (rev & 0xff));
 521         }else{
 522                 printk("  Firmware revision too old: %i.%i.%i, please "
 523                        "upgrade to 2.0.37 or later.\n",
 524                        (rev >> 16), ((rev >> 8) & 0xff), (rev & 0xff));
 525         }
 526
 527 #if (DEBUG > 2)
 528         printk("  Maximum receive rings %i\n", readl(&regs->MaxRxRng));
 529 #endif
 530
 531         /*
 532          * Read the hardware address from the eeprom.  The HW address
 533          * is not really necessary for HIPPI but awfully convenient.
 534          * The pointer arithmetic to put it in dev_addr is ugly, but
 535          * Donald Becker does it this way for the GigE version of this
 536          * card and it's shorter and more portable than any
 537          * other method I've seen.  -VAL
 538          */
 539
 540         *(__be16 *)(dev->dev_addr) =
 541           htons(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA)));
 542         *(__be32 *)(dev->dev_addr+2) =
 543           htonl(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA[4])));
 544
 545         printk("  MAC: %pM\n", dev->dev_addr);
 546
 547         sram_size = rr_read_eeprom_word(rrpriv, 8);
 548         printk("  SRAM size 0x%06x\n", sram_size);
 549
 550         return 0;
 551 }
 552
 553
 554 static int rr_init1(struct net_device *dev)
 555 {
 556         struct rr_private *rrpriv;
 557         struct rr_regs __iomem *regs;
 558         unsigned long myjif, flags;
 559         struct cmd cmd;
 560         u32 hostctrl;
 561         int ecode = 0;
 562         short i;
 563
 564         rrpriv = netdev_priv(dev);
 565         regs = rrpriv->regs;
 566
 567         spin_lock_irqsave(&rrpriv->lock, flags);
 568
 569         hostctrl = readl(&regs->HostCtrl);
 570         writel(hostctrl | HALT_NIC | RR_CLEAR_INT, &regs->HostCtrl);
 571         wmb();
 572
 573         if (hostctrl & PARITY_ERR){
 574                 printk("%s: Parity error halting NIC - this is serious!\n",
 575                        dev->name);
 576                 spin_unlock_irqrestore(&rrpriv->lock, flags);
 577                 ecode = -EFAULT;
 578                 goto error;
 579         }
 580
 581         set_rxaddr(regs, rrpriv->rx_ctrl_dma);
 582         set_infoaddr(regs, rrpriv->info_dma);
 583
 584         rrpriv->info->evt_ctrl.entry_size = sizeof(struct event);
 585         rrpriv->info->evt_ctrl.entries = EVT_RING_ENTRIES;
 586         rrpriv->info->evt_ctrl.mode = 0;
 587         rrpriv->info->evt_ctrl.pi = 0;
 588         set_rraddr(&rrpriv->info->evt_ctrl.rngptr, rrpriv->evt_ring_dma);
 589
 590         rrpriv->info->cmd_ctrl.entry_size = sizeof(struct cmd);
 591         rrpriv->info->cmd_ctrl.entries = CMD_RING_ENTRIES;
 592         rrpriv->info->cmd_ctrl.mode = 0;
 593         rrpriv->info->cmd_ctrl.pi = 15;
 594
 595         for (i = 0; i < CMD_RING_ENTRIES; i++) {
 596                 writel(0, &regs->CmdRing[i]);
 597         }
 598
 599         for (i = 0; i < TX_RING_ENTRIES; i++) {
 600                 rrpriv->tx_ring[i].size = 0;
 601                 set_rraddr(&rrpriv->tx_ring[i].addr, 0);
 602                 rrpriv->tx_skbuff[i] = NULL;
 603         }
 604         rrpriv->info->tx_ctrl.entry_size = sizeof(struct tx_desc);
 605         rrpriv->info->tx_ctrl.entries = TX_RING_ENTRIES;
 606         rrpriv->info->tx_ctrl.mode = 0;
 607         rrpriv->info->tx_ctrl.pi = 0;
 608         set_rraddr(&rrpriv->info->tx_ctrl.rngptr, rrpriv->tx_ring_dma);
 609
 610         /*
 611          * Set dirty_tx before we start receiving interrupts, otherwise
 612          * the interrupt handler might think it is supposed to process
 613          * tx ints before we are up and running, which may cause a null
 614          * pointer access in the int handler.
 615          */
 616         rrpriv->tx_full = 0;
 617         rrpriv->cur_rx = 0;
 618         rrpriv->dirty_rx = rrpriv->dirty_tx = 0;
 619
 620         rr_reset(dev);
 621
 622         /* Tuning values */
 623         writel(0x5000, &regs->ConRetry);
 624         writel(0x100, &regs->ConRetryTmr);
 625         writel(0x500000, &regs->ConTmout);
 626         writel(0x60, &regs->IntrTmr);
 627         writel(0x500000, &regs->TxDataMvTimeout);
 628         writel(0x200000, &regs->RxDataMvTimeout);
 629         writel(0x80, &regs->WriteDmaThresh);
 630         writel(0x80, &regs->ReadDmaThresh);
 631
 632         rrpriv->fw_running = 0;
 633         wmb();
 634
 635         hostctrl &= ~(HALT_NIC | INVALID_INST_B | PARITY_ERR);
 636         writel(hostctrl, &regs->HostCtrl);
 637         wmb();
 638
 639         spin_unlock_irqrestore(&rrpriv->lock, flags);
 640
 641         for (i = 0; i < RX_RING_ENTRIES; i++) {
 642                 struct sk_buff *skb;
 643                 dma_addr_t addr;
 644
 645                 rrpriv->rx_ring[i].mode = 0;
 646                 skb = alloc_skb(dev->mtu + HIPPI_HLEN, GFP_ATOMIC);
 647                 if (!skb) {
 648                         printk(KERN_WARNING "%s: Unable to allocate memory "
 649                                "for receive ring - halting NIC\n", dev->name);
 650                         ecode = -ENOMEM;
 651                         goto error;
 652                 }
 653                 rrpriv->rx_skbuff[i] = skb;
 654                 addr = dma_map_single(&rrpriv->pci_dev->dev, skb->data,
 655                                       dev->mtu + HIPPI_HLEN, DMA_FROM_DEVICE);
 656                 /*
 657                  * Sanity test to see if we conflict with the DMA
 658                  * limitations of the Roadrunner.
 659                  */
 660                 if ((((unsigned long)skb->data) & 0xfff) > ~65320)
 661                         printk("skb alloc error\n");
 662
 663                 set_rraddr(&rrpriv->rx_ring[i].addr, addr);
 664                 rrpriv->rx_ring[i].size = dev->mtu + HIPPI_HLEN;
 665         }
 666
 667         rrpriv->rx_ctrl[4].entry_size = sizeof(struct rx_desc);
 668         rrpriv->rx_ctrl[4].entries = RX_RING_ENTRIES;
 669         rrpriv->rx_ctrl[4].mode = 8;
 670         rrpriv->rx_ctrl[4].pi = 0;
 671         wmb();
 672         set_rraddr(&rrpriv->rx_ctrl[4].rngptr, rrpriv->rx_ring_dma);
 673
 674         udelay(1000);
 675
 676         /*
 677          * Now start the FirmWare.
 678          */
 679         cmd.code = C_START_FW;
 680         cmd.ring = 0;
 681         cmd.index = 0;
 682
 683         rr_issue_cmd(rrpriv, &cmd);
 684
 685         /*
 686          * Give the FirmWare time to chew on the `get running' command.
 687          */
 688         myjif = jiffies + 5 * HZ;
 689         while (time_before(jiffies, myjif) && !rrpriv->fw_running)
 690                 cpu_relax();
 691
 692         netif_start_queue(dev);
 693
 694         return ecode;
 695
 696  error:
 697         /*
 698          * We might have gotten here because we are out of memory,
 699          * make sure we release everything we allocated before failing
 700          */
 701         for (i = 0; i < RX_RING_ENTRIES; i++) {
 702                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
 703
 704                 if (skb) {
 705                         dma_unmap_single(&rrpriv->pci_dev->dev,
 706                                          rrpriv->rx_ring[i].addr.addrlo,
 707                                          dev->mtu + HIPPI_HLEN,
 708                                          DMA_FROM_DEVICE);
 709                         rrpriv->rx_ring[i].size = 0;
 710                         set_rraddr(&rrpriv->rx_ring[i].addr, 0);
 711                         dev_kfree_skb(skb);
 712                         rrpriv->rx_skbuff[i] = NULL;
 713                 }
 714         }
 715         return ecode;
 716 }
 717
 718
 719 /*
 720  * All events are considered to be slow (RX/TX ints do not generate
 721  * events) and are handled here, outside the main interrupt handler,
 722  * to reduce the size of the handler.
 723  */
 724 static u32 rr_handle_event(struct net_device *dev, u32 prodidx, u32 eidx)
 725 {
 726         struct rr_private *rrpriv;
 727         struct rr_regs __iomem *regs;
 728         u32 tmp;
 729
 730         rrpriv = netdev_priv(dev);
 731         regs = rrpriv->regs;
 732
 733         while (prodidx != eidx){
 734                 switch (rrpriv->evt_ring[eidx].code){
 735                 case E_NIC_UP:
 736                         tmp = readl(&regs->FwRev);
 737                         printk(KERN_INFO "%s: Firmware revision %i.%i.%i "
 738                                "up and running\n", dev->name,
 739                                (tmp >> 16), ((tmp >> 8) & 0xff), (tmp & 0xff));
 740                         rrpriv->fw_running = 1;
 741                         writel(RX_RING_ENTRIES - 1, &regs->IpRxPi);
 742                         wmb();
 743                         break;
 744                 case E_LINK_ON:
 745                         printk(KERN_INFO "%s: Optical link ON\n", dev->name);
 746                         break;
 747                 case E_LINK_OFF:
 748                         printk(KERN_INFO "%s: Optical link OFF\n", dev->name);
 749                         break;
 750                 case E_RX_IDLE:
 751                         printk(KERN_WARNING "%s: RX data not moving\n",
 752                                dev->name);
 753                         goto drop;
 754                 case E_WATCHDOG:
 755                         printk(KERN_INFO "%s: The watchdog is here to see "
 756                                "us\n", dev->name);
 757                         break;
 758                 case E_INTERN_ERR:
 759                         printk(KERN_ERR "%s: HIPPI Internal NIC error\n",
 760                                dev->name);
 761                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 762                                &regs->HostCtrl);
 763                         wmb();
 764                         break;
 765                 case E_HOST_ERR:
 766                         printk(KERN_ERR "%s: Host software error\n",
 767                                dev->name);
 768                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 769                                &regs->HostCtrl);
 770                         wmb();
 771                         break;
 772                 /*
 773                  * TX events.
 774                  */
 775                 case E_CON_REJ:
 776                         printk(KERN_WARNING "%s: Connection rejected\n",
 777                                dev->name);
 778                         dev->stats.tx_aborted_errors++;
 779                         break;
 780                 case E_CON_TMOUT:
 781                         printk(KERN_WARNING "%s: Connection timeout\n",
 782                                dev->name);
 783                         break;
 784                 case E_DISC_ERR:
 785                         printk(KERN_WARNING "%s: HIPPI disconnect error\n",
 786                                dev->name);
 787                         dev->stats.tx_aborted_errors++;
 788                         break;
 789                 case E_INT_PRTY:
 790                         printk(KERN_ERR "%s: HIPPI Internal Parity error\n",
 791                                dev->name);
 792                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 793                                &regs->HostCtrl);
 794                         wmb();
 795                         break;
 796                 case E_TX_IDLE:
 797                         printk(KERN_WARNING "%s: Transmitter idle\n",
 798                                dev->name);
 799                         break;
 800                 case E_TX_LINK_DROP:
 801                         printk(KERN_WARNING "%s: Link lost during transmit\n",
 802                                dev->name);
 803                         dev->stats.tx_aborted_errors++;
 804                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 805                                &regs->HostCtrl);
 806                         wmb();
 807                         break;
 808                 case E_TX_INV_RNG:
 809                         printk(KERN_ERR "%s: Invalid send ring block\n",
 810                                dev->name);
 811                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 812                                &regs->HostCtrl);
 813                         wmb();
 814                         break;
 815                 case E_TX_INV_BUF:
 816                         printk(KERN_ERR "%s: Invalid send buffer address\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_DSC:
 823                         printk(KERN_ERR "%s: Invalid descriptor address\n",
 824                                dev->name);
 825                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 826                                &regs->HostCtrl);
 827                         wmb();
 828                         break;
 829                 /*
 830                  * RX events.
 831                  */
 832                 case E_RX_RNG_OUT:
 833                         printk(KERN_INFO "%s: Receive ring full\n", dev->name);
 834                         break;
 835
 836                 case E_RX_PAR_ERR:
 837                         printk(KERN_WARNING "%s: Receive parity error\n",
 838                                dev->name);
 839                         goto drop;
 840                 case E_RX_LLRC_ERR:
 841                         printk(KERN_WARNING "%s: Receive LLRC error\n",
 842                                dev->name);
 843                         goto drop;
 844                 case E_PKT_LN_ERR:
 845                         printk(KERN_WARNING "%s: Receive packet length "
 846                                "error\n", dev->name);
 847                         goto drop;
 848                 case E_DTA_CKSM_ERR:
 849                         printk(KERN_WARNING "%s: Data checksum error\n",
 850                                dev->name);
 851                         goto drop;
 852                 case E_SHT_BST:
 853                         printk(KERN_WARNING "%s: Unexpected short burst "
 854                                "error\n", dev->name);
 855                         goto drop;
 856                 case E_STATE_ERR:
 857                         printk(KERN_WARNING "%s: Recv. state transition"
 858                                " error\n", dev->name);
 859                         goto drop;
 860                 case E_UNEXP_DATA:
 861                         printk(KERN_WARNING "%s: Unexpected data error\n",
 862                                dev->name);
 863                         goto drop;
 864                 case E_LST_LNK_ERR:
 865                         printk(KERN_WARNING "%s: Link lost error\n",
 866                                dev->name);
 867                         goto drop;
 868                 case E_FRM_ERR:
 869                         printk(KERN_WARNING "%s: Framing Error\n",
 870                                dev->name);
 871                         goto drop;
 872                 case E_FLG_SYN_ERR:
 873                         printk(KERN_WARNING "%s: Flag sync. lost during "
 874                                "packet\n", dev->name);
 875                         goto drop;
 876                 case E_RX_INV_BUF:
 877                         printk(KERN_ERR "%s: Invalid receive buffer "
 878                                "address\n", dev->name);
 879                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 880                                &regs->HostCtrl);
 881                         wmb();
 882                         break;
 883                 case E_RX_INV_DSC:
 884                         printk(KERN_ERR "%s: Invalid receive descriptor "
 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_RNG_BLK:
 891                         printk(KERN_ERR "%s: Invalid ring block\n",
 892                                dev->name);
 893                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 894                                &regs->HostCtrl);
 895                         wmb();
 896                         break;
 897                 drop:
 898                         /* Label packet to be dropped.
 899                          * Actual dropping occurs in rx
 900                          * handling.
 901                          *
 902                          * The index of packet we get to drop is
 903                          * the index of the packet following
 904                          * the bad packet. -kbf
 905                          */
 906                         {
 907                                 u16 index = rrpriv->evt_ring[eidx].index;
 908                                 index = (index + (RX_RING_ENTRIES - 1)) %
 909                                         RX_RING_ENTRIES;
 910                                 rrpriv->rx_ring[index].mode |=
 911                                         (PACKET_BAD | PACKET_END);
 912                         }
 913                         break;
 914                 default:
 915                         printk(KERN_WARNING "%s: Unhandled event 0x%02x\n",
 916                                dev->name, rrpriv->evt_ring[eidx].code);
 917                 }
 918                 eidx = (eidx + 1) % EVT_RING_ENTRIES;
 919         }
 920
 921         rrpriv->info->evt_ctrl.pi = eidx;
 922         wmb();
 923         return eidx;
 924 }
 925
 926
 927 static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
 928 {
 929         struct rr_private *rrpriv = netdev_priv(dev);
 930         struct rr_regs __iomem *regs = rrpriv->regs;
 931
 932         do {
 933                 struct rx_desc *desc;
 934                 u32 pkt_len;
 935
 936                 desc = &(rrpriv->rx_ring[index]);
 937                 pkt_len = desc->size;
 938 #if (DEBUG > 2)
 939                 printk("index %i, rxlimit %i\n", index, rxlimit);
 940                 printk("len %x, mode %x\n", pkt_len, desc->mode);
 941 #endif
 942                 if ( (rrpriv->rx_ring[index].mode & PACKET_BAD) == PACKET_BAD){
 943                         dev->stats.rx_dropped++;
 944                         goto defer;
 945                 }
 946
 947                 if (pkt_len > 0){
 948                         struct sk_buff *skb, *rx_skb;
 949
 950                         rx_skb = rrpriv->rx_skbuff[index];
 951
 952                         if (pkt_len < PKT_COPY_THRESHOLD) {
 953                                 skb = alloc_skb(pkt_len, GFP_ATOMIC);
 954                                 if (skb == NULL){
 955                                         printk(KERN_WARNING "%s: Unable to allocate skb (%i bytes), deferring packet\n", dev->name, pkt_len);
 956                                         dev->stats.rx_dropped++;
 957                                         goto defer;
 958                                 } else {
 959                                         dma_sync_single_for_cpu(&rrpriv->pci_dev->dev,
 960                                                                 desc->addr.addrlo,
 961                                                                 pkt_len,
 962                                                                 DMA_FROM_DEVICE);
 963
 964                                         skb_put_data(skb, rx_skb->data,
 965                                                      pkt_len);
 966
 967                                         dma_sync_single_for_device(&rrpriv->pci_dev->dev,
 968                                                                    desc->addr.addrlo,
 969                                                                    pkt_len,
 970                                                                    DMA_FROM_DEVICE);
 971                                 }
 972                         }else{
 973                                 struct sk_buff *newskb;
 974
 975                                 newskb = alloc_skb(dev->mtu + HIPPI_HLEN,
 976                                         GFP_ATOMIC);
 977                                 if (newskb){
 978                                         dma_addr_t addr;
 979
 980                                         dma_unmap_single(&rrpriv->pci_dev->dev,
 981                                                          desc->addr.addrlo,
 982                                                          dev->mtu + HIPPI_HLEN,
 983                                                          DMA_FROM_DEVICE);
 984                                         skb = rx_skb;
 985                                         skb_put(skb, pkt_len);
 986                                         rrpriv->rx_skbuff[index] = newskb;
 987                                         addr = dma_map_single(&rrpriv->pci_dev->dev,
 988                                                               newskb->data,
 989                                                               dev->mtu + HIPPI_HLEN,
 990                                                               DMA_FROM_DEVICE);
 991                                         set_rraddr(&desc->addr, addr);
 992                                 } else {
 993                                         printk("%s: Out of memory, deferring "
 994                                                "packet\n", dev->name);
 995                                         dev->stats.rx_dropped++;
 996                                         goto defer;
 997                                 }
 998                         }
 999                         skb->protocol = hippi_type_trans(skb, dev);
1000
1001                         netif_rx(skb);          /* send it up */
1002
1003                         dev->stats.rx_packets++;
1004                         dev->stats.rx_bytes += pkt_len;
1005                 }
1006         defer:
1007                 desc->mode = 0;
1008                 desc->size = dev->mtu + HIPPI_HLEN;
1009
1010                 if ((index & 7) == 7)
1011                         writel(index, &regs->IpRxPi);
1012
1013                 index = (index + 1) % RX_RING_ENTRIES;
1014         } while(index != rxlimit);
1015
1016         rrpriv->cur_rx = index;
1017         wmb();
1018 }
1019
1020
1021 static irqreturn_t rr_interrupt(int irq, void *dev_id)
1022 {
1023         struct rr_private *rrpriv;
1024         struct rr_regs __iomem *regs;
1025         struct net_device *dev = (struct net_device *)dev_id;
1026         u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon;
1027
1028         rrpriv = netdev_priv(dev);
1029         regs = rrpriv->regs;
1030
1031         if (!(readl(&regs->HostCtrl) & RR_INT))
1032                 return IRQ_NONE;
1033
1034         spin_lock(&rrpriv->lock);
1035
1036         prodidx = readl(&regs->EvtPrd);
1037         txcsmr = (prodidx >> 8) & 0xff;
1038         rxlimit = (prodidx >> 16) & 0xff;
1039         prodidx &= 0xff;
1040
1041 #if (DEBUG > 2)
1042         printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name,
1043                prodidx, rrpriv->info->evt_ctrl.pi);
1044 #endif
1045         /*
1046          * Order here is important.  We must handle events
1047          * before doing anything else in order to catch
1048          * such things as LLRC errors, etc -kbf
1049          */
1050
1051         eidx = rrpriv->info->evt_ctrl.pi;
1052         if (prodidx != eidx)
1053                 eidx = rr_handle_event(dev, prodidx, eidx);
1054
1055         rxindex = rrpriv->cur_rx;
1056         if (rxindex != rxlimit)
1057                 rx_int(dev, rxlimit, rxindex);
1058
1059         txcon = rrpriv->dirty_tx;
1060         if (txcsmr != txcon) {
1061                 do {
1062                         /* Due to occational firmware TX producer/consumer out
1063                          * of sync. error need to check entry in ring -kbf
1064                          */
1065                         if(rrpriv->tx_skbuff[txcon]){
1066                                 struct tx_desc *desc;
1067                                 struct sk_buff *skb;
1068
1069                                 desc = &(rrpriv->tx_ring[txcon]);
1070                                 skb = rrpriv->tx_skbuff[txcon];
1071
1072                                 dev->stats.tx_packets++;
1073                                 dev->stats.tx_bytes += skb->len;
1074
1075                                 dma_unmap_single(&rrpriv->pci_dev->dev,
1076                                                  desc->addr.addrlo, skb->len,
1077                                                  DMA_TO_DEVICE);
1078                                 dev_kfree_skb_irq(skb);
1079
1080                                 rrpriv->tx_skbuff[txcon] = NULL;
1081                                 desc->size = 0;
1082                                 set_rraddr(&rrpriv->tx_ring[txcon].addr, 0);
1083                                 desc->mode = 0;
1084                         }
1085                         txcon = (txcon + 1) % TX_RING_ENTRIES;
1086                 } while (txcsmr != txcon);
1087                 wmb();
1088
1089                 rrpriv->dirty_tx = txcon;
1090                 if (rrpriv->tx_full && rr_if_busy(dev) &&
1091                     (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES)
1092                      != rrpriv->dirty_tx)){
1093                         rrpriv->tx_full = 0;
1094                         netif_wake_queue(dev);
1095                 }
1096         }
1097
1098         eidx |= ((txcsmr << 8) | (rxlimit << 16));
1099         writel(eidx, &regs->EvtCon);
1100         wmb();
1101
1102         spin_unlock(&rrpriv->lock);
1103         return IRQ_HANDLED;
1104 }
1105
1106 static inline void rr_raz_tx(struct rr_private *rrpriv,
1107                              struct net_device *dev)
1108 {
1109         int i;
1110
1111         for (i = 0; i < TX_RING_ENTRIES; i++) {
1112                 struct sk_buff *skb = rrpriv->tx_skbuff[i];
1113
1114                 if (skb) {
1115                         struct tx_desc *desc = &(rrpriv->tx_ring[i]);
1116
1117                         dma_unmap_single(&rrpriv->pci_dev->dev,
1118                                          desc->addr.addrlo, skb->len,
1119                                          DMA_TO_DEVICE);
1120                         desc->size = 0;
1121                         set_rraddr(&desc->addr, 0);
1122                         dev_kfree_skb(skb);
1123                         rrpriv->tx_skbuff[i] = NULL;
1124                 }
1125         }
1126 }
1127
1128
1129 static inline void rr_raz_rx(struct rr_private *rrpriv,
1130                              struct net_device *dev)
1131 {
1132         int i;
1133
1134         for (i = 0; i < RX_RING_ENTRIES; i++) {
1135                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
1136
1137                 if (skb) {
1138                         struct rx_desc *desc = &(rrpriv->rx_ring[i]);
1139
1140                         dma_unmap_single(&rrpriv->pci_dev->dev,
1141                                          desc->addr.addrlo,
1142                                          dev->mtu + HIPPI_HLEN,
1143                                          DMA_FROM_DEVICE);
1144                         desc->size = 0;
1145                         set_rraddr(&desc->addr, 0);
1146                         dev_kfree_skb(skb);
1147                         rrpriv->rx_skbuff[i] = NULL;
1148                 }
1149         }
1150 }
1151
1152 static void rr_timer(struct timer_list *t)
1153 {
1154         struct rr_private *rrpriv = from_timer(rrpriv, t, timer);
1155         struct net_device *dev = pci_get_drvdata(rrpriv->pci_dev);
1156         struct rr_regs __iomem *regs = rrpriv->regs;
1157         unsigned long flags;
1158
1159         if (readl(&regs->HostCtrl) & NIC_HALTED){
1160                 printk("%s: Restarting nic\n", dev->name);
1161                 memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl));
1162                 memset(rrpriv->info, 0, sizeof(struct rr_info));
1163                 wmb();
1164
1165                 rr_raz_tx(rrpriv, dev);
1166                 rr_raz_rx(rrpriv, dev);
1167
1168                 if (rr_init1(dev)) {
1169                         spin_lock_irqsave(&rrpriv->lock, flags);
1170                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
1171                                &regs->HostCtrl);
1172                         spin_unlock_irqrestore(&rrpriv->lock, flags);
1173                 }
1174         }
1175         rrpriv->timer.expires = RUN_AT(5*HZ);
1176         add_timer(&rrpriv->timer);
1177 }
1178
1179
1180 static int rr_open(struct net_device *dev)
1181 {
1182         struct rr_private *rrpriv = netdev_priv(dev);
1183         struct pci_dev *pdev = rrpriv->pci_dev;
1184         struct rr_regs __iomem *regs;
1185         int ecode = 0;
1186         unsigned long flags;
1187         dma_addr_t dma_addr;
1188
1189         regs = rrpriv->regs;
1190
1191         if (rrpriv->fw_rev < 0x00020000) {
1192                 printk(KERN_WARNING "%s: trying to configure device with "
1193                        "obsolete firmware\n", dev->name);
1194                 ecode = -EBUSY;
1195                 goto error;
1196         }
1197
1198         rrpriv->rx_ctrl = dma_alloc_coherent(&pdev->dev,
1199                                              256 * sizeof(struct ring_ctrl),
1200                                              &dma_addr, GFP_KERNEL);
1201         if (!rrpriv->rx_ctrl) {
1202                 ecode = -ENOMEM;
1203                 goto error;
1204         }
1205         rrpriv->rx_ctrl_dma = dma_addr;
1206
1207         rrpriv->info = dma_alloc_coherent(&pdev->dev, sizeof(struct rr_info),
1208                                           &dma_addr, GFP_KERNEL);
1209         if (!rrpriv->info) {
1210                 ecode = -ENOMEM;
1211                 goto error;
1212         }
1213         rrpriv->info_dma = dma_addr;
1214         wmb();
1215
1216         spin_lock_irqsave(&rrpriv->lock, flags);
1217         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1218         readl(&regs->HostCtrl);
1219         spin_unlock_irqrestore(&rrpriv->lock, flags);
1220
1221         if (request_irq(pdev->irq, rr_interrupt, IRQF_SHARED, dev->name, dev)) {
1222                 printk(KERN_WARNING "%s: Requested IRQ %d is busy\n",
1223                        dev->name, pdev->irq);
1224                 ecode = -EAGAIN;
1225                 goto error;
1226         }
1227
1228         if ((ecode = rr_init1(dev)))
1229                 goto error;
1230
1231         /* Set the timer to switch to check for link beat and perhaps switch
1232            to an alternate media type. */
1233         timer_setup(&rrpriv->timer, rr_timer, 0);
1234         rrpriv->timer.expires = RUN_AT(5*HZ);           /* 5 sec. watchdog */
1235         add_timer(&rrpriv->timer);
1236
1237         netif_start_queue(dev);
1238
1239         return ecode;
1240
1241  error:
1242         spin_lock_irqsave(&rrpriv->lock, flags);
1243         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1244         spin_unlock_irqrestore(&rrpriv->lock, flags);
1245
1246         if (rrpriv->info) {
1247                 dma_free_coherent(&pdev->dev, sizeof(struct rr_info),
1248                                   rrpriv->info, rrpriv->info_dma);
1249                 rrpriv->info = NULL;
1250         }
1251         if (rrpriv->rx_ctrl) {
1252                 dma_free_coherent(&pdev->dev, 256 * sizeof(struct ring_ctrl),
1253                                   rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1254                 rrpriv->rx_ctrl = NULL;
1255         }
1256
1257         netif_stop_queue(dev);
1258
1259         return ecode;
1260 }
1261
1262
1263 static void rr_dump(struct net_device *dev)
1264 {
1265         struct rr_private *rrpriv;
1266         struct rr_regs __iomem *regs;
1267         u32 index, cons;
1268         short i;
1269         int len;
1270
1271         rrpriv = netdev_priv(dev);
1272         regs = rrpriv->regs;
1273
1274         printk("%s: dumping NIC TX rings\n", dev->name);
1275
1276         printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n",
1277                readl(&regs->RxPrd), readl(&regs->TxPrd),
1278                readl(&regs->EvtPrd), readl(&regs->TxPi),
1279                rrpriv->info->tx_ctrl.pi);
1280
1281         printk("Error code 0x%x\n", readl(&regs->Fail1));
1282
1283         index = (((readl(&regs->EvtPrd) >> 8) & 0xff) - 1) % TX_RING_ENTRIES;
1284         cons = rrpriv->dirty_tx;
1285         printk("TX ring index %i, TX consumer %i\n",
1286                index, cons);
1287
1288         if (rrpriv->tx_skbuff[index]){
1289                 len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len);
1290                 printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size);
1291                 for (i = 0; i < len; i++){
1292                         if (!(i & 7))
1293                                 printk("\n");
1294                         printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]);
1295                 }
1296                 printk("\n");
1297         }
1298
1299         if (rrpriv->tx_skbuff[cons]){
1300                 len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len);
1301                 printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len);
1302                 printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %p, truesize 0x%x\n",
1303                        rrpriv->tx_ring[cons].mode,
1304                        rrpriv->tx_ring[cons].size,
1305                        (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo,
1306                        rrpriv->tx_skbuff[cons]->data,
1307                        (unsigned int)rrpriv->tx_skbuff[cons]->truesize);
1308                 for (i = 0; i < len; i++){
1309                         if (!(i & 7))
1310                                 printk("\n");
1311                         printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size);
1312                 }
1313                 printk("\n");
1314         }
1315
1316         printk("dumping TX ring info:\n");
1317         for (i = 0; i < TX_RING_ENTRIES; i++)
1318                 printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n",
1319                        rrpriv->tx_ring[i].mode,
1320                        rrpriv->tx_ring[i].size,
1321                        (unsigned long long) rrpriv->tx_ring[i].addr.addrlo);
1322
1323 }
1324
1325
1326 static int rr_close(struct net_device *dev)
1327 {
1328         struct rr_private *rrpriv = netdev_priv(dev);
1329         struct rr_regs __iomem *regs = rrpriv->regs;
1330         struct pci_dev *pdev = rrpriv->pci_dev;
1331         unsigned long flags;
1332         u32 tmp;
1333         short i;
1334
1335         netif_stop_queue(dev);
1336
1337
1338         /*
1339          * Lock to make sure we are not cleaning up while another CPU
1340          * is handling interrupts.
1341          */
1342         spin_lock_irqsave(&rrpriv->lock, flags);
1343
1344         tmp = readl(&regs->HostCtrl);
1345         if (tmp & NIC_HALTED){
1346                 printk("%s: NIC already halted\n", dev->name);
1347                 rr_dump(dev);
1348         }else{
1349                 tmp |= HALT_NIC | RR_CLEAR_INT;
1350                 writel(tmp, &regs->HostCtrl);
1351                 readl(&regs->HostCtrl);
1352         }
1353
1354         rrpriv->fw_running = 0;
1355
1356         spin_unlock_irqrestore(&rrpriv->lock, flags);
1357         del_timer_sync(&rrpriv->timer);
1358         spin_lock_irqsave(&rrpriv->lock, flags);
1359
1360         writel(0, &regs->TxPi);
1361         writel(0, &regs->IpRxPi);
1362
1363         writel(0, &regs->EvtCon);
1364         writel(0, &regs->EvtPrd);
1365
1366         for (i = 0; i < CMD_RING_ENTRIES; i++)
1367                 writel(0, &regs->CmdRing[i]);
1368
1369         rrpriv->info->tx_ctrl.entries = 0;
1370         rrpriv->info->cmd_ctrl.pi = 0;
1371         rrpriv->info->evt_ctrl.pi = 0;
1372         rrpriv->rx_ctrl[4].entries = 0;
1373
1374         rr_raz_tx(rrpriv, dev);
1375         rr_raz_rx(rrpriv, dev);
1376
1377         dma_free_coherent(&pdev->dev, 256 * sizeof(struct ring_ctrl),
1378                           rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1379         rrpriv->rx_ctrl = NULL;
1380
1381         dma_free_coherent(&pdev->dev, sizeof(struct rr_info), rrpriv->info,
1382                           rrpriv->info_dma);
1383         rrpriv->info = NULL;
1384
1385         spin_unlock_irqrestore(&rrpriv->lock, flags);
1386         free_irq(pdev->irq, dev);
1387
1388         return 0;
1389 }
1390
1391
1392 static netdev_tx_t rr_start_xmit(struct sk_buff *skb,
1393                                  struct net_device *dev)
1394 {
1395         struct rr_private *rrpriv = netdev_priv(dev);
1396         struct rr_regs __iomem *regs = rrpriv->regs;
1397         struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
1398         struct ring_ctrl *txctrl;
1399         unsigned long flags;
1400         u32 index, len = skb->len;
1401         u32 *ifield;
1402         struct sk_buff *new_skb;
1403
1404         if (readl(&regs->Mode) & FATAL_ERR)
1405                 printk("error codes Fail1 %02x, Fail2 %02x\n",
1406                        readl(&regs->Fail1), readl(&regs->Fail2));
1407
1408         /*
1409          * We probably need to deal with tbusy here to prevent overruns.
1410          */
1411
1412         if (skb_headroom(skb) < 8){
1413                 printk("incoming skb too small - reallocating\n");
1414                 if (!(new_skb = dev_alloc_skb(len + 8))) {
1415                         dev_kfree_skb(skb);
1416                         netif_wake_queue(dev);
1417                         return NETDEV_TX_OK;
1418                 }
1419                 skb_reserve(new_skb, 8);
1420                 skb_put(new_skb, len);
1421                 skb_copy_from_linear_data(skb, new_skb->data, len);
1422                 dev_kfree_skb(skb);
1423                 skb = new_skb;
1424         }
1425
1426         ifield = skb_push(skb, 8);
1427
1428         ifield[0] = 0;
1429         ifield[1] = hcb->ifield;
1430
1431         /*
1432          * We don't need the lock before we are actually going to start
1433          * fiddling with the control blocks.
1434          */
1435         spin_lock_irqsave(&rrpriv->lock, flags);
1436
1437         txctrl = &rrpriv->info->tx_ctrl;
1438
1439         index = txctrl->pi;
1440
1441         rrpriv->tx_skbuff[index] = skb;
1442         set_rraddr(&rrpriv->tx_ring[index].addr,
1443                    dma_map_single(&rrpriv->pci_dev->dev, skb->data, len + 8, DMA_TO_DEVICE));
1444         rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */
1445         rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END;
1446         txctrl->pi = (index + 1) % TX_RING_ENTRIES;
1447         wmb();
1448         writel(txctrl->pi, &regs->TxPi);
1449
1450         if (txctrl->pi == rrpriv->dirty_tx){
1451                 rrpriv->tx_full = 1;
1452                 netif_stop_queue(dev);
1453         }
1454
1455         spin_unlock_irqrestore(&rrpriv->lock, flags);
1456
1457         return NETDEV_TX_OK;
1458 }
1459
1460
1461 /*
1462  * Read the firmware out of the EEPROM and put it into the SRAM
1463  * (or from user space - later)
1464  *
1465  * This operation requires the NIC to be halted and is performed with
1466  * interrupts disabled and with the spinlock hold.
1467  */
1468 static int rr_load_firmware(struct net_device *dev)
1469 {
1470         struct rr_private *rrpriv;
1471         struct rr_regs __iomem *regs;
1472         size_t eptr, segptr;
1473         int i, j;
1474         u32 localctrl, sptr, len, tmp;
1475         u32 p2len, p2size, nr_seg, revision, io, sram_size;
1476
1477         rrpriv = netdev_priv(dev);
1478         regs = rrpriv->regs;
1479
1480         if (dev->flags & IFF_UP)
1481                 return -EBUSY;
1482
1483         if (!(readl(&regs->HostCtrl) & NIC_HALTED)){
1484                 printk("%s: Trying to load firmware to a running NIC.\n",
1485                        dev->name);
1486                 return -EBUSY;
1487         }
1488
1489         localctrl = readl(&regs->LocalCtrl);
1490         writel(0, &regs->LocalCtrl);
1491
1492         writel(0, &regs->EvtPrd);
1493         writel(0, &regs->RxPrd);
1494         writel(0, &regs->TxPrd);
1495
1496         /*
1497          * First wipe the entire SRAM, otherwise we might run into all
1498          * kinds of trouble ... sigh, this took almost all afternoon
1499          * to track down ;-(
1500          */
1501         io = readl(&regs->ExtIo);
1502         writel(0, &regs->ExtIo);
1503         sram_size = rr_read_eeprom_word(rrpriv, 8);
1504
1505         for (i = 200; i < sram_size / 4; i++){
1506                 writel(i * 4, &regs->WinBase);
1507                 mb();
1508                 writel(0, &regs->WinData);
1509                 mb();
1510         }
1511         writel(io, &regs->ExtIo);
1512         mb();
1513
1514         eptr = rr_read_eeprom_word(rrpriv,
1515                        offsetof(struct eeprom, rncd_info.AddrRunCodeSegs));
1516         eptr = ((eptr & 0x1fffff) >> 3);
1517
1518         p2len = rr_read_eeprom_word(rrpriv, 0x83*4);
1519         p2len = (p2len << 2);
1520         p2size = rr_read_eeprom_word(rrpriv, 0x84*4);
1521         p2size = ((p2size & 0x1fffff) >> 3);
1522
1523         if ((eptr < p2size) || (eptr > (p2size + p2len))){
1524                 printk("%s: eptr is invalid\n", dev->name);
1525                 goto out;
1526         }
1527
1528         revision = rr_read_eeprom_word(rrpriv,
1529                         offsetof(struct eeprom, manf.HeaderFmt));
1530
1531         if (revision != 1){
1532                 printk("%s: invalid firmware format (%i)\n",
1533                        dev->name, revision);
1534                 goto out;
1535         }
1536
1537         nr_seg = rr_read_eeprom_word(rrpriv, eptr);
1538         eptr +=4;
1539 #if (DEBUG > 1)
1540         printk("%s: nr_seg %i\n", dev->name, nr_seg);
1541 #endif
1542
1543         for (i = 0; i < nr_seg; i++){
1544                 sptr = rr_read_eeprom_word(rrpriv, eptr);
1545                 eptr += 4;
1546                 len = rr_read_eeprom_word(rrpriv, eptr);
1547                 eptr += 4;
1548                 segptr = rr_read_eeprom_word(rrpriv, eptr);
1549                 segptr = ((segptr & 0x1fffff) >> 3);
1550                 eptr += 4;
1551 #if (DEBUG > 1)
1552                 printk("%s: segment %i, sram address %06x, length %04x, segptr %06x\n",
1553                        dev->name, i, sptr, len, segptr);
1554 #endif
1555                 for (j = 0; j < len; j++){
1556                         tmp = rr_read_eeprom_word(rrpriv, segptr);
1557                         writel(sptr, &regs->WinBase);
1558                         mb();
1559                         writel(tmp, &regs->WinData);
1560                         mb();
1561                         segptr += 4;
1562                         sptr += 4;
1563                 }
1564         }
1565
1566 out:
1567         writel(localctrl, &regs->LocalCtrl);
1568         mb();
1569         return 0;
1570 }
1571
1572
1573 static int rr_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1574 {
1575         struct rr_private *rrpriv;
1576         unsigned char *image, *oldimage;
1577         unsigned long flags;
1578         unsigned int i;
1579         int error = -EOPNOTSUPP;
1580
1581         rrpriv = netdev_priv(dev);
1582
1583         switch(cmd){
1584         case SIOCRRGFW:
1585                 if (!capable(CAP_SYS_RAWIO)){
1586                         return -EPERM;
1587                 }
1588
1589                 image = kmalloc_array(EEPROM_WORDS, sizeof(u32), GFP_KERNEL);
1590                 if (!image)
1591                         return -ENOMEM;
1592
1593                 if (rrpriv->fw_running){
1594                         printk("%s: Firmware already running\n", dev->name);
1595                         error = -EPERM;
1596                         goto gf_out;
1597                 }
1598
1599                 spin_lock_irqsave(&rrpriv->lock, flags);
1600                 i = rr_read_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1601                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1602                 if (i != EEPROM_BYTES){
1603                         printk(KERN_ERR "%s: Error reading EEPROM\n",
1604                                dev->name);
1605                         error = -EFAULT;
1606                         goto gf_out;
1607                 }
1608                 error = copy_to_user(rq->ifr_data, image, EEPROM_BYTES);
1609                 if (error)
1610                         error = -EFAULT;
1611         gf_out:
1612                 kfree(image);
1613                 return error;
1614
1615         case SIOCRRPFW:
1616                 if (!capable(CAP_SYS_RAWIO)){
1617                         return -EPERM;
1618                 }
1619
1620                 image = memdup_user(rq->ifr_data, EEPROM_BYTES);
1621                 if (IS_ERR(image))
1622                         return PTR_ERR(image);
1623
1624                 oldimage = kmalloc(EEPROM_BYTES, GFP_KERNEL);
1625                 if (!oldimage) {
1626                         kfree(image);
1627                         return -ENOMEM;
1628                 }
1629
1630                 if (rrpriv->fw_running){
1631                         printk("%s: Firmware already running\n", dev->name);
1632                         error = -EPERM;
1633                         goto wf_out;
1634                 }
1635
1636                 printk("%s: Updating EEPROM firmware\n", dev->name);
1637
1638                 spin_lock_irqsave(&rrpriv->lock, flags);
1639                 error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1640                 if (error)
1641                         printk(KERN_ERR "%s: Error writing EEPROM\n",
1642                                dev->name);
1643
1644                 i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES);
1645                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1646
1647                 if (i != EEPROM_BYTES)
1648                         printk(KERN_ERR "%s: Error reading back EEPROM "
1649                                "image\n", dev->name);
1650
1651                 error = memcmp(image, oldimage, EEPROM_BYTES);
1652                 if (error){
1653                         printk(KERN_ERR "%s: Error verifying EEPROM image\n",
1654                                dev->name);
1655                         error = -EFAULT;
1656                 }
1657         wf_out:
1658                 kfree(oldimage);
1659                 kfree(image);
1660                 return error;
1661
1662         case SIOCRRID:
1663                 return put_user(0x52523032, (int __user *)rq->ifr_data);
1664         default:
1665                 return error;
1666         }
1667 }
1668
1669 static const struct pci_device_id rr_pci_tbl[] = {
1670         { PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER,
1671                 PCI_ANY_ID, PCI_ANY_ID, },
1672         { 0,}
1673 };
1674 MODULE_DEVICE_TABLE(pci, rr_pci_tbl);
1675
1676 static struct pci_driver rr_driver = {
1677         .name           = "rrunner",
1678         .id_table       = rr_pci_tbl,
1679         .probe          = rr_init_one,
1680         .remove         = rr_remove_one,
1681 };
1682
1683 module_pci_driver(rr_driver);