drivers/net/hippi/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 <linux/slab.h>
  44 #include <net/sock.h>
  45
  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[] = "rrunner.c: v0.50 11/11/2002  Jes Sorensen (jes@wildopensource.com)\n";
  65
  66
  67 static const struct net_device_ops rr_netdev_ops = {
  68         .ndo_open               = rr_open,
  69         .ndo_stop               = rr_close,
  70         .ndo_do_ioctl           = rr_ioctl,
  71         .ndo_start_xmit         = rr_start_xmit,
  72         .ndo_change_mtu         = hippi_change_mtu,
  73         .ndo_set_mac_address    = hippi_mac_addr,
  74 };
  75
  76 /*
  77  * Implementation notes:
  78  *
  79  * The DMA engine only allows for DMA within physical 64KB chunks of
  80  * memory. The current approach of the driver (and stack) is to use
  81  * linear blocks of memory for the skbuffs. However, as the data block
  82  * is always the first part of the skb and skbs are 2^n aligned so we
  83  * are guarantted to get the whole block within one 64KB align 64KB
  84  * chunk.
  85  *
  86  * On the long term, relying on being able to allocate 64KB linear
  87  * chunks of memory is not feasible and the skb handling code and the
  88  * stack will need to know about I/O vectors or something similar.
  89  */
  90
  91 static int rr_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
  92 {
  93         struct net_device *dev;
  94         static int version_disp;
  95         u8 pci_latency;
  96         struct rr_private *rrpriv;
  97         void *tmpptr;
  98         dma_addr_t ring_dma;
  99         int ret = -ENOMEM;
 100
 101         dev = alloc_hippi_dev(sizeof(struct rr_private));
 102         if (!dev)
 103                 goto out3;
 104
 105         ret = pci_enable_device(pdev);
 106         if (ret) {
 107                 ret = -ENODEV;
 108                 goto out2;
 109         }
 110
 111         rrpriv = netdev_priv(dev);
 112
 113         SET_NETDEV_DEV(dev, &pdev->dev);
 114
 115         ret = pci_request_regions(pdev, "rrunner");
 116         if (ret < 0)
 117                 goto out;
 118
 119         pci_set_drvdata(pdev, dev);
 120
 121         rrpriv->pci_dev = pdev;
 122
 123         spin_lock_init(&rrpriv->lock);
 124
 125         dev->netdev_ops = &rr_netdev_ops;
 126
 127         /* display version info if adapter is found */
 128         if (!version_disp) {
 129                 /* set display flag to TRUE so that */
 130                 /* we only display this string ONCE */
 131                 version_disp = 1;
 132                 printk(version);
 133         }
 134
 135         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
 136         if (pci_latency <= 0x58){
 137                 pci_latency = 0x58;
 138                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, pci_latency);
 139         }
 140
 141         pci_set_master(pdev);
 142
 143         printk(KERN_INFO "%s: Essential RoadRunner serial HIPPI "
 144                "at 0x%llx, irq %i, PCI latency %i\n", dev->name,
 145                (unsigned long long)pci_resource_start(pdev, 0),
 146                pdev->irq, pci_latency);
 147
 148         /*
 149          * Remap the MMIO regs into kernel space.
 150          */
 151         rrpriv->regs = pci_iomap(pdev, 0, 0x1000);
 152         if (!rrpriv->regs) {
 153                 printk(KERN_ERR "%s:  Unable to map I/O register, "
 154                         "RoadRunner will be disabled.\n", dev->name);
 155                 ret = -EIO;
 156                 goto out;
 157         }
 158
 159         tmpptr = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
 160         rrpriv->tx_ring = tmpptr;
 161         rrpriv->tx_ring_dma = ring_dma;
 162
 163         if (!tmpptr) {
 164                 ret = -ENOMEM;
 165                 goto out;
 166         }
 167
 168         tmpptr = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
 169         rrpriv->rx_ring = tmpptr;
 170         rrpriv->rx_ring_dma = ring_dma;
 171
 172         if (!tmpptr) {
 173                 ret = -ENOMEM;
 174                 goto out;
 175         }
 176
 177         tmpptr = pci_alloc_consistent(pdev, EVT_RING_SIZE, &ring_dma);
 178         rrpriv->evt_ring = tmpptr;
 179         rrpriv->evt_ring_dma = ring_dma;
 180
 181         if (!tmpptr) {
 182                 ret = -ENOMEM;
 183                 goto out;
 184         }
 185
 186         /*
 187          * Don't access any register before this point!
 188          */
 189 #ifdef __BIG_ENDIAN
 190         writel(readl(&rrpriv->regs->HostCtrl) | NO_SWAP,
 191                 &rrpriv->regs->HostCtrl);
 192 #endif
 193         /*
 194          * Need to add a case for little-endian 64-bit hosts here.
 195          */
 196
 197         rr_init(dev);
 198
 199         ret = register_netdev(dev);
 200         if (ret)
 201                 goto out;
 202         return 0;
 203
 204  out:
 205         if (rrpriv->rx_ring)
 206                 pci_free_consistent(pdev, RX_TOTAL_SIZE, rrpriv->rx_ring,
 207                                     rrpriv->rx_ring_dma);
 208         if (rrpriv->tx_ring)
 209                 pci_free_consistent(pdev, TX_TOTAL_SIZE, rrpriv->tx_ring,
 210                                     rrpriv->tx_ring_dma);
 211         if (rrpriv->regs)
 212                 pci_iounmap(pdev, rrpriv->regs);
 213         if (pdev) {
 214                 pci_release_regions(pdev);
 215                 pci_set_drvdata(pdev, NULL);
 216         }
 217  out2:
 218         free_netdev(dev);
 219  out3:
 220         return ret;
 221 }
 222
 223 static void rr_remove_one(struct pci_dev *pdev)
 224 {
 225         struct net_device *dev = pci_get_drvdata(pdev);
 226         struct rr_private *rr = netdev_priv(dev);
 227
 228         if (!(readl(&rr->regs->HostCtrl) & NIC_HALTED)) {
 229                 printk(KERN_ERR "%s: trying to unload running NIC\n",
 230                        dev->name);
 231                 writel(HALT_NIC, &rr->regs->HostCtrl);
 232         }
 233
 234         unregister_netdev(dev);
 235         pci_free_consistent(pdev, EVT_RING_SIZE, rr->evt_ring,
 236                             rr->evt_ring_dma);
 237         pci_free_consistent(pdev, RX_TOTAL_SIZE, rr->rx_ring,
 238                             rr->rx_ring_dma);
 239         pci_free_consistent(pdev, TX_TOTAL_SIZE, rr->tx_ring,
 240                             rr->tx_ring_dma);
 241         pci_iounmap(pdev, rr->regs);
 242         pci_release_regions(pdev);
 243         pci_disable_device(pdev);
 244         pci_set_drvdata(pdev, NULL);
 245         free_netdev(dev);
 246 }
 247
 248
 249 /*
 250  * Commands are considered to be slow, thus there is no reason to
 251  * inline this.
 252  */
 253 static void rr_issue_cmd(struct rr_private *rrpriv, struct cmd *cmd)
 254 {
 255         struct rr_regs __iomem *regs;
 256         u32 idx;
 257
 258         regs = rrpriv->regs;
 259         /*
 260          * This is temporary - it will go away in the final version.
 261          * We probably also want to make this function inline.
 262          */
 263         if (readl(&regs->HostCtrl) & NIC_HALTED){
 264                 printk("issuing command for halted NIC, code 0x%x, "
 265                        "HostCtrl %08x\n", cmd->code, readl(&regs->HostCtrl));
 266                 if (readl(&regs->Mode) & FATAL_ERR)
 267                         printk("error codes Fail1 %02x, Fail2 %02x\n",
 268                                readl(&regs->Fail1), readl(&regs->Fail2));
 269         }
 270
 271         idx = rrpriv->info->cmd_ctrl.pi;
 272
 273         writel(*(u32*)(cmd), &regs->CmdRing[idx]);
 274         wmb();
 275
 276         idx = (idx - 1) % CMD_RING_ENTRIES;
 277         rrpriv->info->cmd_ctrl.pi = idx;
 278         wmb();
 279
 280         if (readl(&regs->Mode) & FATAL_ERR)
 281                 printk("error code %02x\n", readl(&regs->Fail1));
 282 }
 283
 284
 285 /*
 286  * Reset the board in a sensible manner. The NIC is already halted
 287  * when we get here and a spin-lock is held.
 288  */
 289 static int rr_reset(struct net_device *dev)
 290 {
 291         struct rr_private *rrpriv;
 292         struct rr_regs __iomem *regs;
 293         u32 start_pc;
 294         int i;
 295
 296         rrpriv = netdev_priv(dev);
 297         regs = rrpriv->regs;
 298
 299         rr_load_firmware(dev);
 300
 301         writel(0x01000000, &regs->TX_state);
 302         writel(0xff800000, &regs->RX_state);
 303         writel(0, &regs->AssistState);
 304         writel(CLEAR_INTA, &regs->LocalCtrl);
 305         writel(0x01, &regs->BrkPt);
 306         writel(0, &regs->Timer);
 307         writel(0, &regs->TimerRef);
 308         writel(RESET_DMA, &regs->DmaReadState);
 309         writel(RESET_DMA, &regs->DmaWriteState);
 310         writel(0, &regs->DmaWriteHostHi);
 311         writel(0, &regs->DmaWriteHostLo);
 312         writel(0, &regs->DmaReadHostHi);
 313         writel(0, &regs->DmaReadHostLo);
 314         writel(0, &regs->DmaReadLen);
 315         writel(0, &regs->DmaWriteLen);
 316         writel(0, &regs->DmaWriteLcl);
 317         writel(0, &regs->DmaWriteIPchecksum);
 318         writel(0, &regs->DmaReadLcl);
 319         writel(0, &regs->DmaReadIPchecksum);
 320         writel(0, &regs->PciState);
 321 #if (BITS_PER_LONG == 64) && defined __LITTLE_ENDIAN
 322         writel(SWAP_DATA | PTR64BIT | PTR_WD_SWAP, &regs->Mode);
 323 #elif (BITS_PER_LONG == 64)
 324         writel(SWAP_DATA | PTR64BIT | PTR_WD_NOSWAP, &regs->Mode);
 325 #else
 326         writel(SWAP_DATA | PTR32BIT | PTR_WD_NOSWAP, &regs->Mode);
 327 #endif
 328
 329 #if 0
 330         /*
 331          * Don't worry, this is just black magic.
 332          */
 333         writel(0xdf000, &regs->RxBase);
 334         writel(0xdf000, &regs->RxPrd);
 335         writel(0xdf000, &regs->RxCon);
 336         writel(0xce000, &regs->TxBase);
 337         writel(0xce000, &regs->TxPrd);
 338         writel(0xce000, &regs->TxCon);
 339         writel(0, &regs->RxIndPro);
 340         writel(0, &regs->RxIndCon);
 341         writel(0, &regs->RxIndRef);
 342         writel(0, &regs->TxIndPro);
 343         writel(0, &regs->TxIndCon);
 344         writel(0, &regs->TxIndRef);
 345         writel(0xcc000, &regs->pad10[0]);
 346         writel(0, &regs->DrCmndPro);
 347         writel(0, &regs->DrCmndCon);
 348         writel(0, &regs->DwCmndPro);
 349         writel(0, &regs->DwCmndCon);
 350         writel(0, &regs->DwCmndRef);
 351         writel(0, &regs->DrDataPro);
 352         writel(0, &regs->DrDataCon);
 353         writel(0, &regs->DrDataRef);
 354         writel(0, &regs->DwDataPro);
 355         writel(0, &regs->DwDataCon);
 356         writel(0, &regs->DwDataRef);
 357 #endif
 358
 359         writel(0xffffffff, &regs->MbEvent);
 360         writel(0, &regs->Event);
 361
 362         writel(0, &regs->TxPi);
 363         writel(0, &regs->IpRxPi);
 364
 365         writel(0, &regs->EvtCon);
 366         writel(0, &regs->EvtPrd);
 367
 368         rrpriv->info->evt_ctrl.pi = 0;
 369
 370         for (i = 0; i < CMD_RING_ENTRIES; i++)
 371                 writel(0, &regs->CmdRing[i]);
 372
 373 /*
 374  * Why 32 ? is this not cache line size dependent?
 375  */
 376         writel(RBURST_64|WBURST_64, &regs->PciState);
 377         wmb();
 378
 379         start_pc = rr_read_eeprom_word(rrpriv,
 380                         offsetof(struct eeprom, rncd_info.FwStart));
 381
 382 #if (DEBUG > 1)
 383         printk("%s: Executing firmware at address 0x%06x\n",
 384                dev->name, start_pc);
 385 #endif
 386
 387         writel(start_pc + 0x800, &regs->Pc);
 388         wmb();
 389         udelay(5);
 390
 391         writel(start_pc, &regs->Pc);
 392         wmb();
 393
 394         return 0;
 395 }
 396
 397
 398 /*
 399  * Read a string from the EEPROM.
 400  */
 401 static unsigned int rr_read_eeprom(struct rr_private *rrpriv,
 402                                 unsigned long offset,
 403                                 unsigned char *buf,
 404                                 unsigned long length)
 405 {
 406         struct rr_regs __iomem *regs = rrpriv->regs;
 407         u32 misc, io, host, i;
 408
 409         io = readl(&regs->ExtIo);
 410         writel(0, &regs->ExtIo);
 411         misc = readl(&regs->LocalCtrl);
 412         writel(0, &regs->LocalCtrl);
 413         host = readl(&regs->HostCtrl);
 414         writel(host | HALT_NIC, &regs->HostCtrl);
 415         mb();
 416
 417         for (i = 0; i < length; i++){
 418                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 419                 mb();
 420                 buf[i] = (readl(&regs->WinData) >> 24) & 0xff;
 421                 mb();
 422         }
 423
 424         writel(host, &regs->HostCtrl);
 425         writel(misc, &regs->LocalCtrl);
 426         writel(io, &regs->ExtIo);
 427         mb();
 428         return i;
 429 }
 430
 431
 432 /*
 433  * Shortcut to read one word (4 bytes) out of the EEPROM and convert
 434  * it to our CPU byte-order.
 435  */
 436 static u32 rr_read_eeprom_word(struct rr_private *rrpriv,
 437                             size_t offset)
 438 {
 439         __be32 word;
 440
 441         if ((rr_read_eeprom(rrpriv, offset,
 442                             (unsigned char *)&word, 4) == 4))
 443                 return be32_to_cpu(word);
 444         return 0;
 445 }
 446
 447
 448 /*
 449  * Write a string to the EEPROM.
 450  *
 451  * This is only called when the firmware is not running.
 452  */
 453 static unsigned int write_eeprom(struct rr_private *rrpriv,
 454                                  unsigned long offset,
 455                                  unsigned char *buf,
 456                                  unsigned long length)
 457 {
 458         struct rr_regs __iomem *regs = rrpriv->regs;
 459         u32 misc, io, data, i, j, ready, error = 0;
 460
 461         io = readl(&regs->ExtIo);
 462         writel(0, &regs->ExtIo);
 463         misc = readl(&regs->LocalCtrl);
 464         writel(ENABLE_EEPROM_WRITE, &regs->LocalCtrl);
 465         mb();
 466
 467         for (i = 0; i < length; i++){
 468                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 469                 mb();
 470                 data = buf[i] << 24;
 471                 /*
 472                  * Only try to write the data if it is not the same
 473                  * value already.
 474                  */
 475                 if ((readl(&regs->WinData) & 0xff000000) != data){
 476                         writel(data, &regs->WinData);
 477                         ready = 0;
 478                         j = 0;
 479                         mb();
 480                         while(!ready){
 481                                 udelay(20);
 482                                 if ((readl(&regs->WinData) & 0xff000000) ==
 483                                     data)
 484                                         ready = 1;
 485                                 mb();
 486                                 if (j++ > 5000){
 487                                         printk("data mismatch: %08x, "
 488                                                "WinData %08x\n", data,
 489                                                readl(&regs->WinData));
 490                                         ready = 1;
 491                                         error = 1;
 492                                 }
 493                         }
 494                 }
 495         }
 496
 497         writel(misc, &regs->LocalCtrl);
 498         writel(io, &regs->ExtIo);
 499         mb();
 500
 501         return error;
 502 }
 503
 504
 505 static int rr_init(struct net_device *dev)
 506 {
 507         struct rr_private *rrpriv;
 508         struct rr_regs __iomem *regs;
 509         u32 sram_size, rev;
 510
 511         rrpriv = netdev_priv(dev);
 512         regs = rrpriv->regs;
 513
 514         rev = readl(&regs->FwRev);
 515         rrpriv->fw_rev = rev;
 516         if (rev > 0x00020024)
 517                 printk("  Firmware revision: %i.%i.%i\n", (rev >> 16),
 518                        ((rev >> 8) & 0xff), (rev & 0xff));
 519         else if (rev >= 0x00020000) {
 520                 printk("  Firmware revision: %i.%i.%i (2.0.37 or "
 521                        "later is recommended)\n", (rev >> 16),
 522                        ((rev >> 8) & 0xff), (rev & 0xff));
 523         }else{
 524                 printk("  Firmware revision too old: %i.%i.%i, please "
 525                        "upgrade to 2.0.37 or later.\n",
 526                        (rev >> 16), ((rev >> 8) & 0xff), (rev & 0xff));
 527         }
 528
 529 #if (DEBUG > 2)
 530         printk("  Maximum receive rings %i\n", readl(&regs->MaxRxRng));
 531 #endif
 532
 533         /*
 534          * Read the hardware address from the eeprom.  The HW address
 535          * is not really necessary for HIPPI but awfully convenient.
 536          * The pointer arithmetic to put it in dev_addr is ugly, but
 537          * Donald Becker does it this way for the GigE version of this
 538          * card and it's shorter and more portable than any
 539          * other method I've seen.  -VAL
 540          */
 541
 542         *(__be16 *)(dev->dev_addr) =
 543           htons(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA)));
 544         *(__be32 *)(dev->dev_addr+2) =
 545           htonl(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA[4])));
 546
 547         printk("  MAC: %pM\n", dev->dev_addr);
 548
 549         sram_size = rr_read_eeprom_word(rrpriv, 8);
 550         printk("  SRAM size 0x%06x\n", sram_size);
 551
 552         return 0;
 553 }
 554
 555
 556 static int rr_init1(struct net_device *dev)
 557 {
 558         struct rr_private *rrpriv;
 559         struct rr_regs __iomem *regs;
 560         unsigned long myjif, flags;
 561         struct cmd cmd;
 562         u32 hostctrl;
 563         int ecode = 0;
 564         short i;
 565
 566         rrpriv = netdev_priv(dev);
 567         regs = rrpriv->regs;
 568
 569         spin_lock_irqsave(&rrpriv->lock, flags);
 570
 571         hostctrl = readl(&regs->HostCtrl);
 572         writel(hostctrl | HALT_NIC | RR_CLEAR_INT, &regs->HostCtrl);
 573         wmb();
 574
 575         if (hostctrl & PARITY_ERR){
 576                 printk("%s: Parity error halting NIC - this is serious!\n",
 577                        dev->name);
 578                 spin_unlock_irqrestore(&rrpriv->lock, flags);
 579                 ecode = -EFAULT;
 580                 goto error;
 581         }
 582
 583         set_rxaddr(regs, rrpriv->rx_ctrl_dma);
 584         set_infoaddr(regs, rrpriv->info_dma);
 585
 586         rrpriv->info->evt_ctrl.entry_size = sizeof(struct event);
 587         rrpriv->info->evt_ctrl.entries = EVT_RING_ENTRIES;
 588         rrpriv->info->evt_ctrl.mode = 0;
 589         rrpriv->info->evt_ctrl.pi = 0;
 590         set_rraddr(&rrpriv->info->evt_ctrl.rngptr, rrpriv->evt_ring_dma);
 591
 592         rrpriv->info->cmd_ctrl.entry_size = sizeof(struct cmd);
 593         rrpriv->info->cmd_ctrl.entries = CMD_RING_ENTRIES;
 594         rrpriv->info->cmd_ctrl.mode = 0;
 595         rrpriv->info->cmd_ctrl.pi = 15;
 596
 597         for (i = 0; i < CMD_RING_ENTRIES; i++) {
 598                 writel(0, &regs->CmdRing[i]);
 599         }
 600
 601         for (i = 0; i < TX_RING_ENTRIES; i++) {
 602                 rrpriv->tx_ring[i].size = 0;
 603                 set_rraddr(&rrpriv->tx_ring[i].addr, 0);
 604                 rrpriv->tx_skbuff[i] = NULL;
 605         }
 606         rrpriv->info->tx_ctrl.entry_size = sizeof(struct tx_desc);
 607         rrpriv->info->tx_ctrl.entries = TX_RING_ENTRIES;
 608         rrpriv->info->tx_ctrl.mode = 0;
 609         rrpriv->info->tx_ctrl.pi = 0;
 610         set_rraddr(&rrpriv->info->tx_ctrl.rngptr, rrpriv->tx_ring_dma);
 611
 612         /*
 613          * Set dirty_tx before we start receiving interrupts, otherwise
 614          * the interrupt handler might think it is supposed to process
 615          * tx ints before we are up and running, which may cause a null
 616          * pointer access in the int handler.
 617          */
 618         rrpriv->tx_full = 0;
 619         rrpriv->cur_rx = 0;
 620         rrpriv->dirty_rx = rrpriv->dirty_tx = 0;
 621
 622         rr_reset(dev);
 623
 624         /* Tuning values */
 625         writel(0x5000, &regs->ConRetry);
 626         writel(0x100, &regs->ConRetryTmr);
 627         writel(0x500000, &regs->ConTmout);
 628         writel(0x60, &regs->IntrTmr);
 629         writel(0x500000, &regs->TxDataMvTimeout);
 630         writel(0x200000, &regs->RxDataMvTimeout);
 631         writel(0x80, &regs->WriteDmaThresh);
 632         writel(0x80, &regs->ReadDmaThresh);
 633
 634         rrpriv->fw_running = 0;
 635         wmb();
 636
 637         hostctrl &= ~(HALT_NIC | INVALID_INST_B | PARITY_ERR);
 638         writel(hostctrl, &regs->HostCtrl);
 639         wmb();
 640
 641         spin_unlock_irqrestore(&rrpriv->lock, flags);
 642
 643         for (i = 0; i < RX_RING_ENTRIES; i++) {
 644                 struct sk_buff *skb;
 645                 dma_addr_t addr;
 646
 647                 rrpriv->rx_ring[i].mode = 0;
 648                 skb = alloc_skb(dev->mtu + HIPPI_HLEN, GFP_ATOMIC);
 649                 if (!skb) {
 650                         printk(KERN_WARNING "%s: Unable to allocate memory "
 651                                "for receive ring - halting NIC\n", dev->name);
 652                         ecode = -ENOMEM;
 653                         goto error;
 654                 }
 655                 rrpriv->rx_skbuff[i] = skb;
 656                 addr = pci_map_single(rrpriv->pci_dev, skb->data,
 657                         dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
 658                 /*
 659                  * Sanity test to see if we conflict with the DMA
 660                  * limitations of the Roadrunner.
 661                  */
 662                 if ((((unsigned long)skb->data) & 0xfff) > ~65320)
 663                         printk("skb alloc error\n");
 664
 665                 set_rraddr(&rrpriv->rx_ring[i].addr, addr);
 666                 rrpriv->rx_ring[i].size = dev->mtu + HIPPI_HLEN;
 667         }
 668
 669         rrpriv->rx_ctrl[4].entry_size = sizeof(struct rx_desc);
 670         rrpriv->rx_ctrl[4].entries = RX_RING_ENTRIES;
 671         rrpriv->rx_ctrl[4].mode = 8;
 672         rrpriv->rx_ctrl[4].pi = 0;
 673         wmb();
 674         set_rraddr(&rrpriv->rx_ctrl[4].rngptr, rrpriv->rx_ring_dma);
 675
 676         udelay(1000);
 677
 678         /*
 679          * Now start the FirmWare.
 680          */
 681         cmd.code = C_START_FW;
 682         cmd.ring = 0;
 683         cmd.index = 0;
 684
 685         rr_issue_cmd(rrpriv, &cmd);
 686
 687         /*
 688          * Give the FirmWare time to chew on the `get running' command.
 689          */
 690         myjif = jiffies + 5 * HZ;
 691         while (time_before(jiffies, myjif) && !rrpriv->fw_running)
 692                 cpu_relax();
 693
 694         netif_start_queue(dev);
 695
 696         return ecode;
 697
 698  error:
 699         /*
 700          * We might have gotten here because we are out of memory,
 701          * make sure we release everything we allocated before failing
 702          */
 703         for (i = 0; i < RX_RING_ENTRIES; i++) {
 704                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
 705
 706                 if (skb) {
 707                         pci_unmap_single(rrpriv->pci_dev,
 708                                          rrpriv->rx_ring[i].addr.addrlo,
 709                                          dev->mtu + HIPPI_HLEN,
 710                                          PCI_DMA_FROMDEVICE);
 711                         rrpriv->rx_ring[i].size = 0;
 712                         set_rraddr(&rrpriv->rx_ring[i].addr, 0);
 713                         dev_kfree_skb(skb);
 714                         rrpriv->rx_skbuff[i] = NULL;
 715                 }
 716         }
 717         return ecode;
 718 }
 719
 720
 721 /*
 722  * All events are considered to be slow (RX/TX ints do not generate
 723  * events) and are handled here, outside the main interrupt handler,
 724  * to reduce the size of the handler.
 725  */
 726 static u32 rr_handle_event(struct net_device *dev, u32 prodidx, u32 eidx)
 727 {
 728         struct rr_private *rrpriv;
 729         struct rr_regs __iomem *regs;
 730         u32 tmp;
 731
 732         rrpriv = netdev_priv(dev);
 733         regs = rrpriv->regs;
 734
 735         while (prodidx != eidx){
 736                 switch (rrpriv->evt_ring[eidx].code){
 737                 case E_NIC_UP:
 738                         tmp = readl(&regs->FwRev);
 739                         printk(KERN_INFO "%s: Firmware revision %i.%i.%i "
 740                                "up and running\n", dev->name,
 741                                (tmp >> 16), ((tmp >> 8) & 0xff), (tmp & 0xff));
 742                         rrpriv->fw_running = 1;
 743                         writel(RX_RING_ENTRIES - 1, &regs->IpRxPi);
 744                         wmb();
 745                         break;
 746                 case E_LINK_ON:
 747                         printk(KERN_INFO "%s: Optical link ON\n", dev->name);
 748                         break;
 749                 case E_LINK_OFF:
 750                         printk(KERN_INFO "%s: Optical link OFF\n", dev->name);
 751                         break;
 752                 case E_RX_IDLE:
 753                         printk(KERN_WARNING "%s: RX data not moving\n",
 754                                dev->name);
 755                         goto drop;
 756                 case E_WATCHDOG:
 757                         printk(KERN_INFO "%s: The watchdog is here to see "
 758                                "us\n", dev->name);
 759                         break;
 760                 case E_INTERN_ERR:
 761                         printk(KERN_ERR "%s: HIPPI Internal NIC error\n",
 762                                dev->name);
 763                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 764                                &regs->HostCtrl);
 765                         wmb();
 766                         break;
 767                 case E_HOST_ERR:
 768                         printk(KERN_ERR "%s: Host software error\n",
 769                                dev->name);
 770                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 771                                &regs->HostCtrl);
 772                         wmb();
 773                         break;
 774                 /*
 775                  * TX events.
 776                  */
 777                 case E_CON_REJ:
 778                         printk(KERN_WARNING "%s: Connection rejected\n",
 779                                dev->name);
 780                         dev->stats.tx_aborted_errors++;
 781                         break;
 782                 case E_CON_TMOUT:
 783                         printk(KERN_WARNING "%s: Connection timeout\n",
 784                                dev->name);
 785                         break;
 786                 case E_DISC_ERR:
 787                         printk(KERN_WARNING "%s: HIPPI disconnect error\n",
 788                                dev->name);
 789                         dev->stats.tx_aborted_errors++;
 790                         break;
 791                 case E_INT_PRTY:
 792                         printk(KERN_ERR "%s: HIPPI Internal Parity error\n",
 793                                dev->name);
 794                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 795                                &regs->HostCtrl);
 796                         wmb();
 797                         break;
 798                 case E_TX_IDLE:
 799                         printk(KERN_WARNING "%s: Transmitter idle\n",
 800                                dev->name);
 801                         break;
 802                 case E_TX_LINK_DROP:
 803                         printk(KERN_WARNING "%s: Link lost during transmit\n",
 804                                dev->name);
 805                         dev->stats.tx_aborted_errors++;
 806                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 807                                &regs->HostCtrl);
 808                         wmb();
 809                         break;
 810                 case E_TX_INV_RNG:
 811                         printk(KERN_ERR "%s: Invalid send ring block\n",
 812                                dev->name);
 813                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 814                                &regs->HostCtrl);
 815                         wmb();
 816                         break;
 817                 case E_TX_INV_BUF:
 818                         printk(KERN_ERR "%s: Invalid send buffer address\n",
 819                                dev->name);
 820                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 821                                &regs->HostCtrl);
 822                         wmb();
 823                         break;
 824                 case E_TX_INV_DSC:
 825                         printk(KERN_ERR "%s: Invalid descriptor address\n",
 826                                dev->name);
 827                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 828                                &regs->HostCtrl);
 829                         wmb();
 830                         break;
 831                 /*
 832                  * RX events.
 833                  */
 834                 case E_RX_RNG_OUT:
 835                         printk(KERN_INFO "%s: Receive ring full\n", dev->name);
 836                         break;
 837
 838                 case E_RX_PAR_ERR:
 839                         printk(KERN_WARNING "%s: Receive parity error\n",
 840                                dev->name);
 841                         goto drop;
 842                 case E_RX_LLRC_ERR:
 843                         printk(KERN_WARNING "%s: Receive LLRC error\n",
 844                                dev->name);
 845                         goto drop;
 846                 case E_PKT_LN_ERR:
 847                         printk(KERN_WARNING "%s: Receive packet length "
 848                                "error\n", dev->name);
 849                         goto drop;
 850                 case E_DTA_CKSM_ERR:
 851                         printk(KERN_WARNING "%s: Data checksum error\n",
 852                                dev->name);
 853                         goto drop;
 854                 case E_SHT_BST:
 855                         printk(KERN_WARNING "%s: Unexpected short burst "
 856                                "error\n", dev->name);
 857                         goto drop;
 858                 case E_STATE_ERR:
 859                         printk(KERN_WARNING "%s: Recv. state transition"
 860                                " error\n", dev->name);
 861                         goto drop;
 862                 case E_UNEXP_DATA:
 863                         printk(KERN_WARNING "%s: Unexpected data error\n",
 864                                dev->name);
 865                         goto drop;
 866                 case E_LST_LNK_ERR:
 867                         printk(KERN_WARNING "%s: Link lost error\n",
 868                                dev->name);
 869                         goto drop;
 870                 case E_FRM_ERR:
 871                         printk(KERN_WARNING "%s: Framming Error\n",
 872                                dev->name);
 873                         goto drop;
 874                 case E_FLG_SYN_ERR:
 875                         printk(KERN_WARNING "%s: Flag sync. lost during "
 876                                "packet\n", dev->name);
 877                         goto drop;
 878                 case E_RX_INV_BUF:
 879                         printk(KERN_ERR "%s: Invalid receive buffer "
 880                                "address\n", dev->name);
 881                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 882                                &regs->HostCtrl);
 883                         wmb();
 884                         break;
 885                 case E_RX_INV_DSC:
 886                         printk(KERN_ERR "%s: Invalid receive descriptor "
 887                                "address\n", dev->name);
 888                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 889                                &regs->HostCtrl);
 890                         wmb();
 891                         break;
 892                 case E_RNG_BLK:
 893                         printk(KERN_ERR "%s: Invalid ring block\n",
 894                                dev->name);
 895                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 896                                &regs->HostCtrl);
 897                         wmb();
 898                         break;
 899                 drop:
 900                         /* Label packet to be dropped.
 901                          * Actual dropping occurs in rx
 902                          * handling.
 903                          *
 904                          * The index of packet we get to drop is
 905                          * the index of the packet following
 906                          * the bad packet. -kbf
 907                          */
 908                         {
 909                                 u16 index = rrpriv->evt_ring[eidx].index;
 910                                 index = (index + (RX_RING_ENTRIES - 1)) %
 911                                         RX_RING_ENTRIES;
 912                                 rrpriv->rx_ring[index].mode |=
 913                                         (PACKET_BAD | PACKET_END);
 914                         }
 915                         break;
 916                 default:
 917                         printk(KERN_WARNING "%s: Unhandled event 0x%02x\n",
 918                                dev->name, rrpriv->evt_ring[eidx].code);
 919                 }
 920                 eidx = (eidx + 1) % EVT_RING_ENTRIES;
 921         }
 922
 923         rrpriv->info->evt_ctrl.pi = eidx;
 924         wmb();
 925         return eidx;
 926 }
 927
 928
 929 static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
 930 {
 931         struct rr_private *rrpriv = netdev_priv(dev);
 932         struct rr_regs __iomem *regs = rrpriv->regs;
 933
 934         do {
 935                 struct rx_desc *desc;
 936                 u32 pkt_len;
 937
 938                 desc = &(rrpriv->rx_ring[index]);
 939                 pkt_len = desc->size;
 940 #if (DEBUG > 2)
 941                 printk("index %i, rxlimit %i\n", index, rxlimit);
 942                 printk("len %x, mode %x\n", pkt_len, desc->mode);
 943 #endif
 944                 if ( (rrpriv->rx_ring[index].mode & PACKET_BAD) == PACKET_BAD){
 945                         dev->stats.rx_dropped++;
 946                         goto defer;
 947                 }
 948
 949                 if (pkt_len > 0){
 950                         struct sk_buff *skb, *rx_skb;
 951
 952                         rx_skb = rrpriv->rx_skbuff[index];
 953
 954                         if (pkt_len < PKT_COPY_THRESHOLD) {
 955                                 skb = alloc_skb(pkt_len, GFP_ATOMIC);
 956                                 if (skb == NULL){
 957                                         printk(KERN_WARNING "%s: Unable to allocate skb (%i bytes), deferring packet\n", dev->name, pkt_len);
 958                                         dev->stats.rx_dropped++;
 959                                         goto defer;
 960                                 } else {
 961                                         pci_dma_sync_single_for_cpu(rrpriv->pci_dev,
 962                                                                     desc->addr.addrlo,
 963                                                                     pkt_len,
 964                                                                     PCI_DMA_FROMDEVICE);
 965
 966                                         memcpy(skb_put(skb, pkt_len),
 967                                                rx_skb->data, pkt_len);
 968
 969                                         pci_dma_sync_single_for_device(rrpriv->pci_dev,
 970                                                                        desc->addr.addrlo,
 971                                                                        pkt_len,
 972                                                                        PCI_DMA_FROMDEVICE);
 973                                 }
 974                         }else{
 975                                 struct sk_buff *newskb;
 976
 977                                 newskb = alloc_skb(dev->mtu + HIPPI_HLEN,
 978                                         GFP_ATOMIC);
 979                                 if (newskb){
 980                                         dma_addr_t addr;
 981
 982                                         pci_unmap_single(rrpriv->pci_dev,
 983                                                 desc->addr.addrlo, dev->mtu +
 984                                                 HIPPI_HLEN, PCI_DMA_FROMDEVICE);
 985                                         skb = rx_skb;
 986                                         skb_put(skb, pkt_len);
 987                                         rrpriv->rx_skbuff[index] = newskb;
 988                                         addr = pci_map_single(rrpriv->pci_dev,
 989                                                 newskb->data,
 990                                                 dev->mtu + HIPPI_HLEN,
 991                                                 PCI_DMA_FROMDEVICE);
 992                                         set_rraddr(&desc->addr, addr);
 993                                 } else {
 994                                         printk("%s: Out of memory, deferring "
 995                                                "packet\n", dev->name);
 996                                         dev->stats.rx_dropped++;
 997                                         goto defer;
 998                                 }
 999                         }
1000                         skb->protocol = hippi_type_trans(skb, dev);
1001
1002                         netif_rx(skb);          /* send it up */
1003
1004                         dev->stats.rx_packets++;
1005                         dev->stats.rx_bytes += pkt_len;
1006                 }
1007         defer:
1008                 desc->mode = 0;
1009                 desc->size = dev->mtu + HIPPI_HLEN;
1010
1011                 if ((index & 7) == 7)
1012                         writel(index, &regs->IpRxPi);
1013
1014                 index = (index + 1) % RX_RING_ENTRIES;
1015         } while(index != rxlimit);
1016
1017         rrpriv->cur_rx = index;
1018         wmb();
1019 }
1020
1021
1022 static irqreturn_t rr_interrupt(int irq, void *dev_id)
1023 {
1024         struct rr_private *rrpriv;
1025         struct rr_regs __iomem *regs;
1026         struct net_device *dev = (struct net_device *)dev_id;
1027         u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon;
1028
1029         rrpriv = netdev_priv(dev);
1030         regs = rrpriv->regs;
1031
1032         if (!(readl(&regs->HostCtrl) & RR_INT))
1033                 return IRQ_NONE;
1034
1035         spin_lock(&rrpriv->lock);
1036
1037         prodidx = readl(&regs->EvtPrd);
1038         txcsmr = (prodidx >> 8) & 0xff;
1039         rxlimit = (prodidx >> 16) & 0xff;
1040         prodidx &= 0xff;
1041
1042 #if (DEBUG > 2)
1043         printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name,
1044                prodidx, rrpriv->info->evt_ctrl.pi);
1045 #endif
1046         /*
1047          * Order here is important.  We must handle events
1048          * before doing anything else in order to catch
1049          * such things as LLRC errors, etc -kbf
1050          */
1051
1052         eidx = rrpriv->info->evt_ctrl.pi;
1053         if (prodidx != eidx)
1054                 eidx = rr_handle_event(dev, prodidx, eidx);
1055
1056         rxindex = rrpriv->cur_rx;
1057         if (rxindex != rxlimit)
1058                 rx_int(dev, rxlimit, rxindex);
1059
1060         txcon = rrpriv->dirty_tx;
1061         if (txcsmr != txcon) {
1062                 do {
1063                         /* Due to occational firmware TX producer/consumer out
1064                          * of sync. error need to check entry in ring -kbf
1065                          */
1066                         if(rrpriv->tx_skbuff[txcon]){
1067                                 struct tx_desc *desc;
1068                                 struct sk_buff *skb;
1069
1070                                 desc = &(rrpriv->tx_ring[txcon]);
1071                                 skb = rrpriv->tx_skbuff[txcon];
1072
1073                                 dev->stats.tx_packets++;
1074                                 dev->stats.tx_bytes += skb->len;
1075
1076                                 pci_unmap_single(rrpriv->pci_dev,
1077                                                  desc->addr.addrlo, skb->len,
1078                                                  PCI_DMA_TODEVICE);
1079                                 dev_kfree_skb_irq(skb);
1080
1081                                 rrpriv->tx_skbuff[txcon] = NULL;
1082                                 desc->size = 0;
1083                                 set_rraddr(&rrpriv->tx_ring[txcon].addr, 0);
1084                                 desc->mode = 0;
1085                         }
1086                         txcon = (txcon + 1) % TX_RING_ENTRIES;
1087                 } while (txcsmr != txcon);
1088                 wmb();
1089
1090                 rrpriv->dirty_tx = txcon;
1091                 if (rrpriv->tx_full && rr_if_busy(dev) &&
1092                     (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES)
1093                      != rrpriv->dirty_tx)){
1094                         rrpriv->tx_full = 0;
1095                         netif_wake_queue(dev);
1096                 }
1097         }
1098
1099         eidx |= ((txcsmr << 8) | (rxlimit << 16));
1100         writel(eidx, &regs->EvtCon);
1101         wmb();
1102
1103         spin_unlock(&rrpriv->lock);
1104         return IRQ_HANDLED;
1105 }
1106
1107 static inline void rr_raz_tx(struct rr_private *rrpriv,
1108                              struct net_device *dev)
1109 {
1110         int i;
1111
1112         for (i = 0; i < TX_RING_ENTRIES; i++) {
1113                 struct sk_buff *skb = rrpriv->tx_skbuff[i];
1114
1115                 if (skb) {
1116                         struct tx_desc *desc = &(rrpriv->tx_ring[i]);
1117
1118                         pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1119                                 skb->len, PCI_DMA_TODEVICE);
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                         pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1141                                 dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
1142                         desc->size = 0;
1143                         set_rraddr(&desc->addr, 0);
1144                         dev_kfree_skb(skb);
1145                         rrpriv->rx_skbuff[i] = NULL;
1146                 }
1147         }
1148 }
1149
1150 static void rr_timer(unsigned long data)
1151 {
1152         struct net_device *dev = (struct net_device *)data;
1153         struct rr_private *rrpriv = netdev_priv(dev);
1154         struct rr_regs __iomem *regs = rrpriv->regs;
1155         unsigned long flags;
1156
1157         if (readl(&regs->HostCtrl) & NIC_HALTED){
1158                 printk("%s: Restarting nic\n", dev->name);
1159                 memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl));
1160                 memset(rrpriv->info, 0, sizeof(struct rr_info));
1161                 wmb();
1162
1163                 rr_raz_tx(rrpriv, dev);
1164                 rr_raz_rx(rrpriv, dev);
1165
1166                 if (rr_init1(dev)) {
1167                         spin_lock_irqsave(&rrpriv->lock, flags);
1168                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
1169                                &regs->HostCtrl);
1170                         spin_unlock_irqrestore(&rrpriv->lock, flags);
1171                 }
1172         }
1173         rrpriv->timer.expires = RUN_AT(5*HZ);
1174         add_timer(&rrpriv->timer);
1175 }
1176
1177
1178 static int rr_open(struct net_device *dev)
1179 {
1180         struct rr_private *rrpriv = netdev_priv(dev);
1181         struct pci_dev *pdev = rrpriv->pci_dev;
1182         struct rr_regs __iomem *regs;
1183         int ecode = 0;
1184         unsigned long flags;
1185         dma_addr_t dma_addr;
1186
1187         regs = rrpriv->regs;
1188
1189         if (rrpriv->fw_rev < 0x00020000) {
1190                 printk(KERN_WARNING "%s: trying to configure device with "
1191                        "obsolete firmware\n", dev->name);
1192                 ecode = -EBUSY;
1193                 goto error;
1194         }
1195
1196         rrpriv->rx_ctrl = pci_alloc_consistent(pdev,
1197                                                256 * sizeof(struct ring_ctrl),
1198                                                &dma_addr);
1199         if (!rrpriv->rx_ctrl) {
1200                 ecode = -ENOMEM;
1201                 goto error;
1202         }
1203         rrpriv->rx_ctrl_dma = dma_addr;
1204         memset(rrpriv->rx_ctrl, 0, 256*sizeof(struct ring_ctrl));
1205
1206         rrpriv->info = pci_alloc_consistent(pdev, sizeof(struct rr_info),
1207                                             &dma_addr);
1208         if (!rrpriv->info) {
1209                 ecode = -ENOMEM;
1210                 goto error;
1211         }
1212         rrpriv->info_dma = dma_addr;
1213         memset(rrpriv->info, 0, sizeof(struct rr_info));
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         init_timer(&rrpriv->timer);
1234         rrpriv->timer.expires = RUN_AT(5*HZ);           /* 5 sec. watchdog */
1235         rrpriv->timer.data = (unsigned long)dev;
1236         rrpriv->timer.function = rr_timer;               /* timer handler */
1237         add_timer(&rrpriv->timer);
1238
1239         netif_start_queue(dev);
1240
1241         return ecode;
1242
1243  error:
1244         spin_lock_irqsave(&rrpriv->lock, flags);
1245         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1246         spin_unlock_irqrestore(&rrpriv->lock, flags);
1247
1248         if (rrpriv->info) {
1249                 pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
1250                                     rrpriv->info_dma);
1251                 rrpriv->info = NULL;
1252         }
1253         if (rrpriv->rx_ctrl) {
1254                 pci_free_consistent(pdev, sizeof(struct ring_ctrl),
1255                                     rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1256                 rrpriv->rx_ctrl = NULL;
1257         }
1258
1259         netif_stop_queue(dev);
1260
1261         return ecode;
1262 }
1263
1264
1265 static void rr_dump(struct net_device *dev)
1266 {
1267         struct rr_private *rrpriv;
1268         struct rr_regs __iomem *regs;
1269         u32 index, cons;
1270         short i;
1271         int len;
1272
1273         rrpriv = netdev_priv(dev);
1274         regs = rrpriv->regs;
1275
1276         printk("%s: dumping NIC TX rings\n", dev->name);
1277
1278         printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n",
1279                readl(&regs->RxPrd), readl(&regs->TxPrd),
1280                readl(&regs->EvtPrd), readl(&regs->TxPi),
1281                rrpriv->info->tx_ctrl.pi);
1282
1283         printk("Error code 0x%x\n", readl(&regs->Fail1));
1284
1285         index = (((readl(&regs->EvtPrd) >> 8) & 0xff) - 1) % TX_RING_ENTRIES;
1286         cons = rrpriv->dirty_tx;
1287         printk("TX ring index %i, TX consumer %i\n",
1288                index, cons);
1289
1290         if (rrpriv->tx_skbuff[index]){
1291                 len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len);
1292                 printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size);
1293                 for (i = 0; i < len; i++){
1294                         if (!(i & 7))
1295                                 printk("\n");
1296                         printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]);
1297                 }
1298                 printk("\n");
1299         }
1300
1301         if (rrpriv->tx_skbuff[cons]){
1302                 len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len);
1303                 printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len);
1304                 printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %08lx, truesize 0x%x\n",
1305                        rrpriv->tx_ring[cons].mode,
1306                        rrpriv->tx_ring[cons].size,
1307                        (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo,
1308                        (unsigned long)rrpriv->tx_skbuff[cons]->data,
1309                        (unsigned int)rrpriv->tx_skbuff[cons]->truesize);
1310                 for (i = 0; i < len; i++){
1311                         if (!(i & 7))
1312                                 printk("\n");
1313                         printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size);
1314                 }
1315                 printk("\n");
1316         }
1317
1318         printk("dumping TX ring info:\n");
1319         for (i = 0; i < TX_RING_ENTRIES; i++)
1320                 printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n",
1321                        rrpriv->tx_ring[i].mode,
1322                        rrpriv->tx_ring[i].size,
1323                        (unsigned long long) rrpriv->tx_ring[i].addr.addrlo);
1324
1325 }
1326
1327
1328 static int rr_close(struct net_device *dev)
1329 {
1330         struct rr_private *rrpriv = netdev_priv(dev);
1331         struct rr_regs __iomem *regs = rrpriv->regs;
1332         struct pci_dev *pdev = rrpriv->pci_dev;
1333         unsigned long flags;
1334         u32 tmp;
1335         short i;
1336
1337         netif_stop_queue(dev);
1338
1339
1340         /*
1341          * Lock to make sure we are not cleaning up while another CPU
1342          * is handling interrupts.
1343          */
1344         spin_lock_irqsave(&rrpriv->lock, flags);
1345
1346         tmp = readl(&regs->HostCtrl);
1347         if (tmp & NIC_HALTED){
1348                 printk("%s: NIC already halted\n", dev->name);
1349                 rr_dump(dev);
1350         }else{
1351                 tmp |= HALT_NIC | RR_CLEAR_INT;
1352                 writel(tmp, &regs->HostCtrl);
1353                 readl(&regs->HostCtrl);
1354         }
1355
1356         rrpriv->fw_running = 0;
1357
1358         del_timer_sync(&rrpriv->timer);
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         pci_free_consistent(pdev, 256 * sizeof(struct ring_ctrl),
1378                             rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1379         rrpriv->rx_ctrl = NULL;
1380
1381         pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
1382                             rrpriv->info_dma);
1383         rrpriv->info = NULL;
1384
1385         free_irq(pdev->irq, dev);
1386         spin_unlock_irqrestore(&rrpriv->lock, flags);
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 = (u32 *)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, pci_map_single(
1443                 rrpriv->pci_dev, skb->data, len + 8, PCI_DMA_TODEVICE));
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(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 = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1621                 oldimage = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1622                 if (!image || !oldimage) {
1623                         error = -ENOMEM;
1624                         goto wf_out;
1625                 }
1626
1627                 error = copy_from_user(image, rq->ifr_data, EEPROM_BYTES);
1628                 if (error) {
1629                         error = -EFAULT;
1630                         goto wf_out;
1631                 }
1632
1633                 if (rrpriv->fw_running){
1634                         printk("%s: Firmware already running\n", dev->name);
1635                         error = -EPERM;
1636                         goto wf_out;
1637                 }
1638
1639                 printk("%s: Updating EEPROM firmware\n", dev->name);
1640
1641                 spin_lock_irqsave(&rrpriv->lock, flags);
1642                 error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1643                 if (error)
1644                         printk(KERN_ERR "%s: Error writing EEPROM\n",
1645                                dev->name);
1646
1647                 i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES);
1648                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1649
1650                 if (i != EEPROM_BYTES)
1651                         printk(KERN_ERR "%s: Error reading back EEPROM "
1652                                "image\n", dev->name);
1653
1654                 error = memcmp(image, oldimage, EEPROM_BYTES);
1655                 if (error){
1656                         printk(KERN_ERR "%s: Error verifying EEPROM image\n",
1657                                dev->name);
1658                         error = -EFAULT;
1659                 }
1660         wf_out:
1661                 kfree(oldimage);
1662                 kfree(image);
1663                 return error;
1664
1665         case SIOCRRID:
1666                 return put_user(0x52523032, (int __user *)rq->ifr_data);
1667         default:
1668                 return error;
1669         }
1670 }
1671
1672 static DEFINE_PCI_DEVICE_TABLE(rr_pci_tbl) = {
1673         { PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER,
1674                 PCI_ANY_ID, PCI_ANY_ID, },
1675         { 0,}
1676 };
1677 MODULE_DEVICE_TABLE(pci, rr_pci_tbl);
1678
1679 static struct pci_driver rr_driver = {
1680         .name           = "rrunner",
1681         .id_table       = rr_pci_tbl,
1682         .probe          = rr_init_one,
1683         .remove         = rr_remove_one,
1684 };
1685
1686 static int __init rr_init_module(void)
1687 {
1688         return pci_register_driver(&rr_driver);
1689 }
1690
1691 static void __exit rr_cleanup_module(void)
1692 {
1693         pci_unregister_driver(&rr_driver);
1694 }
1695
1696 module_init(rr_init_module);
1697 module_exit(rr_cleanup_module);