drivers/net/rrunner.c

   1 /*
   2  * rrunner.c: Linux driver for the Essential RoadRunner HIPPI board.
   3  *
   4  * Copyright (C) 1998-2002 by Jes Sorensen, <jes@wildopensource.com>.
   5  *
   6  * Thanks to Essential Communication for providing us with hardware
   7  * and very comprehensive documentation without which I would not have
   8  * been able to write this driver. A special thank you to John Gibbon
   9  * for sorting out the legal issues, with the NDA, allowing the code to
  10  * be released under the GPL.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * Thanks to Jayaram Bhat from ODS/Essential for fixing some of the
  18  * stupid bugs in my code.
  19  *
  20  * Softnet support and various other patches from Val Henson of
  21  * ODS/Essential.
  22  *
  23  * PCI DMA mapping code partly based on work by Francois Romieu.
  24  */
  25
  26
  27 #define DEBUG 1
  28 #define RX_DMA_SKBUFF 1
  29 #define PKT_COPY_THRESHOLD 512
  30
  31 #include <linux/config.h>
  32 #include <linux/module.h>
  33 #include <linux/types.h>
  34 #include <linux/errno.h>
  35 #include <linux/ioport.h>
  36 #include <linux/pci.h>
  37 #include <linux/kernel.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/hippidevice.h>
  40 #include <linux/skbuff.h>
  41 #include <linux/init.h>
  42 #include <linux/delay.h>
  43 #include <linux/mm.h>
  44 #include <net/sock.h>
  45
  46 #include <asm/system.h>
  47 #include <asm/cache.h>
  48 #include <asm/byteorder.h>
  49 #include <asm/io.h>
  50 #include <asm/irq.h>
  51 #include <asm/uaccess.h>
  52
  53 #define rr_if_busy(dev)     netif_queue_stopped(dev)
  54 #define rr_if_running(dev)  netif_running(dev)
  55
  56 #include "rrunner.h"
  57
  58 #define RUN_AT(x) (jiffies + (x))
  59
  60
  61 MODULE_AUTHOR("Jes Sorensen <jes@wildopensource.com>");
  62 MODULE_DESCRIPTION("Essential RoadRunner HIPPI driver");
  63 MODULE_LICENSE("GPL");
  64
  65 static char version[] __initdata = "rrunner.c: v0.50 11/11/2002  Jes Sorensen (jes@wildopensource.com)\n";
  66
  67 /*
  68  * Implementation notes:
  69  *
  70  * The DMA engine only allows for DMA within physical 64KB chunks of
  71  * memory. The current approach of the driver (and stack) is to use
  72  * linear blocks of memory for the skbuffs. However, as the data block
  73  * is always the first part of the skb and skbs are 2^n aligned so we
  74  * are guarantted to get the whole block within one 64KB align 64KB
  75  * chunk.
  76  *
  77  * On the long term, relying on being able to allocate 64KB linear
  78  * chunks of memory is not feasible and the skb handling code and the
  79  * stack will need to know about I/O vectors or something similar.
  80  */
  81
  82 /*
  83  * These are checked at init time to see if they are at least 256KB
  84  * and increased to 256KB if they are not. This is done to avoid ending
  85  * up with socket buffers smaller than the MTU size,
  86  */
  87 extern __u32 sysctl_wmem_max;
  88 extern __u32 sysctl_rmem_max;
  89
  90 static int __devinit rr_init_one(struct pci_dev *pdev,
  91         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_MODULE_OWNER(dev);
 114         SET_NETDEV_DEV(dev, &pdev->dev);
 115
 116         if (pci_request_regions(pdev, "rrunner")) {
 117                 ret = -EIO;
 118                 goto out;
 119         }
 120
 121         pci_set_drvdata(pdev, dev);
 122
 123         rrpriv->pci_dev = pdev;
 124
 125         spin_lock_init(&rrpriv->lock);
 126
 127         dev->irq = pdev->irq;
 128         dev->open = &rr_open;
 129         dev->hard_start_xmit = &rr_start_xmit;
 130         dev->stop = &rr_close;
 131         dev->get_stats = &rr_get_stats;
 132         dev->do_ioctl = &rr_ioctl;
 133
 134         dev->base_addr = pci_resource_start(pdev, 0);
 135
 136         /* display version info if adapter is found */
 137         if (!version_disp) {
 138                 /* set display flag to TRUE so that */
 139                 /* we only display this string ONCE */
 140                 version_disp = 1;
 141                 printk(version);
 142         }
 143
 144         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
 145         if (pci_latency <= 0x58){
 146                 pci_latency = 0x58;
 147                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, pci_latency);
 148         }
 149
 150         pci_set_master(pdev);
 151
 152         printk(KERN_INFO "%s: Essential RoadRunner serial HIPPI "
 153                "at 0x%08lx, irq %i, PCI latency %i\n", dev->name,
 154                dev->base_addr, dev->irq, pci_latency);
 155
 156         /*
 157          * Remap the regs into kernel space.
 158          */
 159
 160         rrpriv->regs = (struct rr_regs *)ioremap(dev->base_addr, 0x1000);
 161
 162         if (!rrpriv->regs){
 163                 printk(KERN_ERR "%s:  Unable to map I/O register, "
 164                         "RoadRunner will be disabled.\n", dev->name);
 165                 ret = -EIO;
 166                 goto out;
 167         }
 168
 169         tmpptr = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
 170         rrpriv->tx_ring = tmpptr;
 171         rrpriv->tx_ring_dma = ring_dma;
 172
 173         if (!tmpptr) {
 174                 ret = -ENOMEM;
 175                 goto out;
 176         }
 177
 178         tmpptr = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
 179         rrpriv->rx_ring = tmpptr;
 180         rrpriv->rx_ring_dma = ring_dma;
 181
 182         if (!tmpptr) {
 183                 ret = -ENOMEM;
 184                 goto out;
 185         }
 186
 187         tmpptr = pci_alloc_consistent(pdev, EVT_RING_SIZE, &ring_dma);
 188         rrpriv->evt_ring = tmpptr;
 189         rrpriv->evt_ring_dma = ring_dma;
 190
 191         if (!tmpptr) {
 192                 ret = -ENOMEM;
 193                 goto out;
 194         }
 195
 196         /*
 197          * Don't access any register before this point!
 198          */
 199 #ifdef __BIG_ENDIAN
 200         writel(readl(&rrpriv->regs->HostCtrl) | NO_SWAP,
 201                 &rrpriv->regs->HostCtrl);
 202 #endif
 203         /*
 204          * Need to add a case for little-endian 64-bit hosts here.
 205          */
 206
 207         rr_init(dev);
 208
 209         dev->base_addr = 0;
 210
 211         ret = register_netdev(dev);
 212         if (ret)
 213                 goto out;
 214         return 0;
 215
 216  out:
 217         if (rrpriv->rx_ring)
 218                 pci_free_consistent(pdev, RX_TOTAL_SIZE, rrpriv->rx_ring,
 219                                     rrpriv->rx_ring_dma);
 220         if (rrpriv->tx_ring)
 221                 pci_free_consistent(pdev, TX_TOTAL_SIZE, rrpriv->tx_ring,
 222                                     rrpriv->tx_ring_dma);
 223         if (rrpriv->regs)
 224                 iounmap(rrpriv->regs);
 225         if (pdev) {
 226                 pci_release_regions(pdev);
 227                 pci_set_drvdata(pdev, NULL);
 228         }
 229  out2:
 230         free_netdev(dev);
 231  out3:
 232         return ret;
 233 }
 234
 235 static void __devexit rr_remove_one (struct pci_dev *pdev)
 236 {
 237         struct net_device *dev = pci_get_drvdata(pdev);
 238
 239         if (dev) {
 240                 struct rr_private *rr = netdev_priv(dev);
 241
 242                 if (!(readl(&rr->regs->HostCtrl) & NIC_HALTED)){
 243                         printk(KERN_ERR "%s: trying to unload running NIC\n",
 244                                dev->name);
 245                         writel(HALT_NIC, &rr->regs->HostCtrl);
 246                 }
 247
 248                 pci_free_consistent(pdev, EVT_RING_SIZE, rr->evt_ring,
 249                                     rr->evt_ring_dma);
 250                 pci_free_consistent(pdev, RX_TOTAL_SIZE, rr->rx_ring,
 251                                     rr->rx_ring_dma);
 252                 pci_free_consistent(pdev, TX_TOTAL_SIZE, rr->tx_ring,
 253                                     rr->tx_ring_dma);
 254                 unregister_netdev(dev);
 255                 iounmap(rr->regs);
 256                 free_netdev(dev);
 257                 pci_release_regions(pdev);
 258                 pci_disable_device(pdev);
 259                 pci_set_drvdata(pdev, NULL);
 260         }
 261 }
 262
 263
 264 /*
 265  * Commands are considered to be slow, thus there is no reason to
 266  * inline this.
 267  */
 268 static void rr_issue_cmd(struct rr_private *rrpriv, struct cmd *cmd)
 269 {
 270         struct rr_regs *regs;
 271         u32 idx;
 272
 273         regs = rrpriv->regs;
 274         /*
 275          * This is temporary - it will go away in the final version.
 276          * We probably also want to make this function inline.
 277          */
 278         if (readl(&regs->HostCtrl) & NIC_HALTED){
 279                 printk("issuing command for halted NIC, code 0x%x, "
 280                        "HostCtrl %08x\n", cmd->code, readl(&regs->HostCtrl));
 281                 if (readl(&regs->Mode) & FATAL_ERR)
 282                         printk("error codes Fail1 %02x, Fail2 %02x\n",
 283                                readl(&regs->Fail1), readl(&regs->Fail2));
 284         }
 285
 286         idx = rrpriv->info->cmd_ctrl.pi;
 287
 288         writel(*(u32*)(cmd), &regs->CmdRing[idx]);
 289         wmb();
 290
 291         idx = (idx - 1) % CMD_RING_ENTRIES;
 292         rrpriv->info->cmd_ctrl.pi = idx;
 293         wmb();
 294
 295         if (readl(&regs->Mode) & FATAL_ERR)
 296                 printk("error code %02x\n", readl(&regs->Fail1));
 297 }
 298
 299
 300 /*
 301  * Reset the board in a sensible manner. The NIC is already halted
 302  * when we get here and a spin-lock is held.
 303  */
 304 static int rr_reset(struct net_device *dev)
 305 {
 306         struct rr_private *rrpriv;
 307         struct rr_regs *regs;
 308         struct eeprom *hw = NULL;
 309         u32 start_pc;
 310         int i;
 311
 312         rrpriv = netdev_priv(dev);
 313         regs = rrpriv->regs;
 314
 315         rr_load_firmware(dev);
 316
 317         writel(0x01000000, &regs->TX_state);
 318         writel(0xff800000, &regs->RX_state);
 319         writel(0, &regs->AssistState);
 320         writel(CLEAR_INTA, &regs->LocalCtrl);
 321         writel(0x01, &regs->BrkPt);
 322         writel(0, &regs->Timer);
 323         writel(0, &regs->TimerRef);
 324         writel(RESET_DMA, &regs->DmaReadState);
 325         writel(RESET_DMA, &regs->DmaWriteState);
 326         writel(0, &regs->DmaWriteHostHi);
 327         writel(0, &regs->DmaWriteHostLo);
 328         writel(0, &regs->DmaReadHostHi);
 329         writel(0, &regs->DmaReadHostLo);
 330         writel(0, &regs->DmaReadLen);
 331         writel(0, &regs->DmaWriteLen);
 332         writel(0, &regs->DmaWriteLcl);
 333         writel(0, &regs->DmaWriteIPchecksum);
 334         writel(0, &regs->DmaReadLcl);
 335         writel(0, &regs->DmaReadIPchecksum);
 336         writel(0, &regs->PciState);
 337 #if (BITS_PER_LONG == 64) && defined __LITTLE_ENDIAN
 338         writel(SWAP_DATA | PTR64BIT | PTR_WD_SWAP, &regs->Mode);
 339 #elif (BITS_PER_LONG == 64)
 340         writel(SWAP_DATA | PTR64BIT | PTR_WD_NOSWAP, &regs->Mode);
 341 #else
 342         writel(SWAP_DATA | PTR32BIT | PTR_WD_NOSWAP, &regs->Mode);
 343 #endif
 344
 345 #if 0
 346         /*
 347          * Don't worry, this is just black magic.
 348          */
 349         writel(0xdf000, &regs->RxBase);
 350         writel(0xdf000, &regs->RxPrd);
 351         writel(0xdf000, &regs->RxCon);
 352         writel(0xce000, &regs->TxBase);
 353         writel(0xce000, &regs->TxPrd);
 354         writel(0xce000, &regs->TxCon);
 355         writel(0, &regs->RxIndPro);
 356         writel(0, &regs->RxIndCon);
 357         writel(0, &regs->RxIndRef);
 358         writel(0, &regs->TxIndPro);
 359         writel(0, &regs->TxIndCon);
 360         writel(0, &regs->TxIndRef);
 361         writel(0xcc000, &regs->pad10[0]);
 362         writel(0, &regs->DrCmndPro);
 363         writel(0, &regs->DrCmndCon);
 364         writel(0, &regs->DwCmndPro);
 365         writel(0, &regs->DwCmndCon);
 366         writel(0, &regs->DwCmndRef);
 367         writel(0, &regs->DrDataPro);
 368         writel(0, &regs->DrDataCon);
 369         writel(0, &regs->DrDataRef);
 370         writel(0, &regs->DwDataPro);
 371         writel(0, &regs->DwDataCon);
 372         writel(0, &regs->DwDataRef);
 373 #endif
 374
 375         writel(0xffffffff, &regs->MbEvent);
 376         writel(0, &regs->Event);
 377
 378         writel(0, &regs->TxPi);
 379         writel(0, &regs->IpRxPi);
 380
 381         writel(0, &regs->EvtCon);
 382         writel(0, &regs->EvtPrd);
 383
 384         rrpriv->info->evt_ctrl.pi = 0;
 385
 386         for (i = 0; i < CMD_RING_ENTRIES; i++)
 387                 writel(0, &regs->CmdRing[i]);
 388
 389 /*
 390  * Why 32 ? is this not cache line size dependent?
 391  */
 392         writel(RBURST_64|WBURST_64, &regs->PciState);
 393         wmb();
 394
 395         start_pc = rr_read_eeprom_word(rrpriv, &hw->rncd_info.FwStart);
 396
 397 #if (DEBUG > 1)
 398         printk("%s: Executing firmware at address 0x%06x\n",
 399                dev->name, start_pc);
 400 #endif
 401
 402         writel(start_pc + 0x800, &regs->Pc);
 403         wmb();
 404         udelay(5);
 405
 406         writel(start_pc, &regs->Pc);
 407         wmb();
 408
 409         return 0;
 410 }
 411
 412
 413 /*
 414  * Read a string from the EEPROM.
 415  */
 416 static unsigned int rr_read_eeprom(struct rr_private *rrpriv,
 417                                 unsigned long offset,
 418                                 unsigned char *buf,
 419                                 unsigned long length)
 420 {
 421         struct rr_regs *regs = rrpriv->regs;
 422         u32 misc, io, host, i;
 423
 424         io = readl(&regs->ExtIo);
 425         writel(0, &regs->ExtIo);
 426         misc = readl(&regs->LocalCtrl);
 427         writel(0, &regs->LocalCtrl);
 428         host = readl(&regs->HostCtrl);
 429         writel(host | HALT_NIC, &regs->HostCtrl);
 430         mb();
 431
 432         for (i = 0; i < length; i++){
 433                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 434                 mb();
 435                 buf[i] = (readl(&regs->WinData) >> 24) & 0xff;
 436                 mb();
 437         }
 438
 439         writel(host, &regs->HostCtrl);
 440         writel(misc, &regs->LocalCtrl);
 441         writel(io, &regs->ExtIo);
 442         mb();
 443         return i;
 444 }
 445
 446
 447 /*
 448  * Shortcut to read one word (4 bytes) out of the EEPROM and convert
 449  * it to our CPU byte-order.
 450  */
 451 static u32 rr_read_eeprom_word(struct rr_private *rrpriv,
 452                             void * offset)
 453 {
 454         u32 word;
 455
 456         if ((rr_read_eeprom(rrpriv, (unsigned long)offset,
 457                             (char *)&word, 4) == 4))
 458                 return be32_to_cpu(word);
 459         return 0;
 460 }
 461
 462
 463 /*
 464  * Write a string to the EEPROM.
 465  *
 466  * This is only called when the firmware is not running.
 467  */
 468 static unsigned int write_eeprom(struct rr_private *rrpriv,
 469                                  unsigned long offset,
 470                                  unsigned char *buf,
 471                                  unsigned long length)
 472 {
 473         struct rr_regs *regs = rrpriv->regs;
 474         u32 misc, io, data, i, j, ready, error = 0;
 475
 476         io = readl(&regs->ExtIo);
 477         writel(0, &regs->ExtIo);
 478         misc = readl(&regs->LocalCtrl);
 479         writel(ENABLE_EEPROM_WRITE, &regs->LocalCtrl);
 480         mb();
 481
 482         for (i = 0; i < length; i++){
 483                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 484                 mb();
 485                 data = buf[i] << 24;
 486                 /*
 487                  * Only try to write the data if it is not the same
 488                  * value already.
 489                  */
 490                 if ((readl(&regs->WinData) & 0xff000000) != data){
 491                         writel(data, &regs->WinData);
 492                         ready = 0;
 493                         j = 0;
 494                         mb();
 495                         while(!ready){
 496                                 udelay(20);
 497                                 if ((readl(&regs->WinData) & 0xff000000) ==
 498                                     data)
 499                                         ready = 1;
 500                                 mb();
 501                                 if (j++ > 5000){
 502                                         printk("data mismatch: %08x, "
 503                                                "WinData %08x\n", data,
 504                                                readl(&regs->WinData));
 505                                         ready = 1;
 506                                         error = 1;
 507                                 }
 508                         }
 509                 }
 510         }
 511
 512         writel(misc, &regs->LocalCtrl);
 513         writel(io, &regs->ExtIo);
 514         mb();
 515
 516         return error;
 517 }
 518
 519
 520 static int __init rr_init(struct net_device *dev)
 521 {
 522         struct rr_private *rrpriv;
 523         struct rr_regs *regs;
 524         struct eeprom *hw = NULL;
 525         u32 sram_size, rev;
 526         int i;
 527
 528         rrpriv = netdev_priv(dev);
 529         regs = rrpriv->regs;
 530
 531         rev = readl(&regs->FwRev);
 532         rrpriv->fw_rev = rev;
 533         if (rev > 0x00020024)
 534                 printk("  Firmware revision: %i.%i.%i\n", (rev >> 16),
 535                        ((rev >> 8) & 0xff), (rev & 0xff));
 536         else if (rev >= 0x00020000) {
 537                 printk("  Firmware revision: %i.%i.%i (2.0.37 or "
 538                        "later is recommended)\n", (rev >> 16),
 539                        ((rev >> 8) & 0xff), (rev & 0xff));
 540         }else{
 541                 printk("  Firmware revision too old: %i.%i.%i, please "
 542                        "upgrade to 2.0.37 or later.\n",
 543                        (rev >> 16), ((rev >> 8) & 0xff), (rev & 0xff));
 544         }
 545
 546 #if (DEBUG > 2)
 547         printk("  Maximum receive rings %i\n", readl(&regs->MaxRxRng));
 548 #endif
 549
 550         /*
 551          * Read the hardware address from the eeprom.  The HW address
 552          * is not really necessary for HIPPI but awfully convenient.
 553          * The pointer arithmetic to put it in dev_addr is ugly, but
 554          * Donald Becker does it this way for the GigE version of this
 555          * card and it's shorter and more portable than any
 556          * other method I've seen.  -VAL
 557          */
 558
 559         *(u16 *)(dev->dev_addr) =
 560           htons(rr_read_eeprom_word(rrpriv, &hw->manf.BoardULA));
 561         *(u32 *)(dev->dev_addr+2) =
 562           htonl(rr_read_eeprom_word(rrpriv, &hw->manf.BoardULA[4]));
 563
 564         printk("  MAC: ");
 565
 566         for (i = 0; i < 5; i++)
 567                 printk("%2.2x:", dev->dev_addr[i]);
 568         printk("%2.2x\n", dev->dev_addr[i]);
 569
 570         sram_size = rr_read_eeprom_word(rrpriv, (void *)8);
 571         printk("  SRAM size 0x%06x\n", sram_size);
 572
 573         if (sysctl_rmem_max < 262144){
 574                 printk("  Receive socket buffer limit too low (%i), "
 575                        "setting to 262144\n", sysctl_rmem_max);
 576                 sysctl_rmem_max = 262144;
 577         }
 578
 579         if (sysctl_wmem_max < 262144){
 580                 printk("  Transmit socket buffer limit too low (%i), "
 581                        "setting to 262144\n", sysctl_wmem_max);
 582                 sysctl_wmem_max = 262144;
 583         }
 584
 585         return 0;
 586 }
 587
 588
 589 static int rr_init1(struct net_device *dev)
 590 {
 591         struct rr_private *rrpriv;
 592         struct rr_regs *regs;
 593         unsigned long myjif, flags;
 594         struct cmd cmd;
 595         u32 hostctrl;
 596         int ecode = 0;
 597         short i;
 598
 599         rrpriv = netdev_priv(dev);
 600         regs = rrpriv->regs;
 601
 602         spin_lock_irqsave(&rrpriv->lock, flags);
 603
 604         hostctrl = readl(&regs->HostCtrl);
 605         writel(hostctrl | HALT_NIC | RR_CLEAR_INT, &regs->HostCtrl);
 606         wmb();
 607
 608         if (hostctrl & PARITY_ERR){
 609                 printk("%s: Parity error halting NIC - this is serious!\n",
 610                        dev->name);
 611                 spin_unlock_irqrestore(&rrpriv->lock, flags);
 612                 ecode = -EFAULT;
 613                 goto error;
 614         }
 615
 616         set_rxaddr(regs, rrpriv->rx_ctrl_dma);
 617         set_infoaddr(regs, rrpriv->info_dma);
 618
 619         rrpriv->info->evt_ctrl.entry_size = sizeof(struct event);
 620         rrpriv->info->evt_ctrl.entries = EVT_RING_ENTRIES;
 621         rrpriv->info->evt_ctrl.mode = 0;
 622         rrpriv->info->evt_ctrl.pi = 0;
 623         set_rraddr(&rrpriv->info->evt_ctrl.rngptr, rrpriv->evt_ring_dma);
 624
 625         rrpriv->info->cmd_ctrl.entry_size = sizeof(struct cmd);
 626         rrpriv->info->cmd_ctrl.entries = CMD_RING_ENTRIES;
 627         rrpriv->info->cmd_ctrl.mode = 0;
 628         rrpriv->info->cmd_ctrl.pi = 15;
 629
 630         for (i = 0; i < CMD_RING_ENTRIES; i++) {
 631                 writel(0, &regs->CmdRing[i]);
 632         }
 633
 634         for (i = 0; i < TX_RING_ENTRIES; i++) {
 635                 rrpriv->tx_ring[i].size = 0;
 636                 set_rraddr(&rrpriv->tx_ring[i].addr, 0);
 637                 rrpriv->tx_skbuff[i] = NULL;
 638         }
 639         rrpriv->info->tx_ctrl.entry_size = sizeof(struct tx_desc);
 640         rrpriv->info->tx_ctrl.entries = TX_RING_ENTRIES;
 641         rrpriv->info->tx_ctrl.mode = 0;
 642         rrpriv->info->tx_ctrl.pi = 0;
 643         set_rraddr(&rrpriv->info->tx_ctrl.rngptr, rrpriv->tx_ring_dma);
 644
 645         /*
 646          * Set dirty_tx before we start receiving interrupts, otherwise
 647          * the interrupt handler might think it is supposed to process
 648          * tx ints before we are up and running, which may cause a null
 649          * pointer access in the int handler.
 650          */
 651         rrpriv->tx_full = 0;
 652         rrpriv->cur_rx = 0;
 653         rrpriv->dirty_rx = rrpriv->dirty_tx = 0;
 654
 655         rr_reset(dev);
 656
 657         /* Tuning values */
 658         writel(0x5000, &regs->ConRetry);
 659         writel(0x100, &regs->ConRetryTmr);
 660         writel(0x500000, &regs->ConTmout);
 661         writel(0x60, &regs->IntrTmr);
 662         writel(0x500000, &regs->TxDataMvTimeout);
 663         writel(0x200000, &regs->RxDataMvTimeout);
 664         writel(0x80, &regs->WriteDmaThresh);
 665         writel(0x80, &regs->ReadDmaThresh);
 666
 667         rrpriv->fw_running = 0;
 668         wmb();
 669
 670         hostctrl &= ~(HALT_NIC | INVALID_INST_B | PARITY_ERR);
 671         writel(hostctrl, &regs->HostCtrl);
 672         wmb();
 673
 674         spin_unlock_irqrestore(&rrpriv->lock, flags);
 675
 676         for (i = 0; i < RX_RING_ENTRIES; i++) {
 677                 struct sk_buff *skb;
 678                 dma_addr_t addr;
 679
 680                 rrpriv->rx_ring[i].mode = 0;
 681                 skb = alloc_skb(dev->mtu + HIPPI_HLEN, GFP_ATOMIC);
 682                 if (!skb) {
 683                         printk(KERN_WARNING "%s: Unable to allocate memory "
 684                                "for receive ring - halting NIC\n", dev->name);
 685                         ecode = -ENOMEM;
 686                         goto error;
 687                 }
 688                 rrpriv->rx_skbuff[i] = skb;
 689                 addr = pci_map_single(rrpriv->pci_dev, skb->data,
 690                         dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
 691                 /*
 692                  * Sanity test to see if we conflict with the DMA
 693                  * limitations of the Roadrunner.
 694                  */
 695                 if ((((unsigned long)skb->data) & 0xfff) > ~65320)
 696                         printk("skb alloc error\n");
 697
 698                 set_rraddr(&rrpriv->rx_ring[i].addr, addr);
 699                 rrpriv->rx_ring[i].size = dev->mtu + HIPPI_HLEN;
 700         }
 701
 702         rrpriv->rx_ctrl[4].entry_size = sizeof(struct rx_desc);
 703         rrpriv->rx_ctrl[4].entries = RX_RING_ENTRIES;
 704         rrpriv->rx_ctrl[4].mode = 8;
 705         rrpriv->rx_ctrl[4].pi = 0;
 706         wmb();
 707         set_rraddr(&rrpriv->rx_ctrl[4].rngptr, rrpriv->rx_ring_dma);
 708
 709         udelay(1000);
 710
 711         /*
 712          * Now start the FirmWare.
 713          */
 714         cmd.code = C_START_FW;
 715         cmd.ring = 0;
 716         cmd.index = 0;
 717
 718         rr_issue_cmd(rrpriv, &cmd);
 719
 720         /*
 721          * Give the FirmWare time to chew on the `get running' command.
 722          */
 723         myjif = jiffies + 5 * HZ;
 724         while (time_before(jiffies, myjif) && !rrpriv->fw_running)
 725                 cpu_relax();
 726
 727         netif_start_queue(dev);
 728
 729         return ecode;
 730
 731  error:
 732         /*
 733          * We might have gotten here because we are out of memory,
 734          * make sure we release everything we allocated before failing
 735          */
 736         for (i = 0; i < RX_RING_ENTRIES; i++) {
 737                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
 738
 739                 if (skb) {
 740                         pci_unmap_single(rrpriv->pci_dev,
 741                                          rrpriv->rx_ring[i].addr.addrlo,
 742                                          dev->mtu + HIPPI_HLEN,
 743                                          PCI_DMA_FROMDEVICE);
 744                         rrpriv->rx_ring[i].size = 0;
 745                         set_rraddr(&rrpriv->rx_ring[i].addr, 0);
 746                         dev_kfree_skb(skb);
 747                         rrpriv->rx_skbuff[i] = NULL;
 748                 }
 749         }
 750         return ecode;
 751 }
 752
 753
 754 /*
 755  * All events are considered to be slow (RX/TX ints do not generate
 756  * events) and are handled here, outside the main interrupt handler,
 757  * to reduce the size of the handler.
 758  */
 759 static u32 rr_handle_event(struct net_device *dev, u32 prodidx, u32 eidx)
 760 {
 761         struct rr_private *rrpriv;
 762         struct rr_regs *regs;
 763         u32 tmp;
 764
 765         rrpriv = netdev_priv(dev);
 766         regs = rrpriv->regs;
 767
 768         while (prodidx != eidx){
 769                 switch (rrpriv->evt_ring[eidx].code){
 770                 case E_NIC_UP:
 771                         tmp = readl(&regs->FwRev);
 772                         printk(KERN_INFO "%s: Firmware revision %i.%i.%i "
 773                                "up and running\n", dev->name,
 774                                (tmp >> 16), ((tmp >> 8) & 0xff), (tmp & 0xff));
 775                         rrpriv->fw_running = 1;
 776                         writel(RX_RING_ENTRIES - 1, &regs->IpRxPi);
 777                         wmb();
 778                         break;
 779                 case E_LINK_ON:
 780                         printk(KERN_INFO "%s: Optical link ON\n", dev->name);
 781                         break;
 782                 case E_LINK_OFF:
 783                         printk(KERN_INFO "%s: Optical link OFF\n", dev->name);
 784                         break;
 785                 case E_RX_IDLE:
 786                         printk(KERN_WARNING "%s: RX data not moving\n",
 787                                dev->name);
 788                         goto drop;
 789                 case E_WATCHDOG:
 790                         printk(KERN_INFO "%s: The watchdog is here to see "
 791                                "us\n", dev->name);
 792                         break;
 793                 case E_INTERN_ERR:
 794                         printk(KERN_ERR "%s: HIPPI Internal NIC error\n",
 795                                dev->name);
 796                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 797                                &regs->HostCtrl);
 798                         wmb();
 799                         break;
 800                 case E_HOST_ERR:
 801                         printk(KERN_ERR "%s: Host software error\n",
 802                                dev->name);
 803                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 804                                &regs->HostCtrl);
 805                         wmb();
 806                         break;
 807                 /*
 808                  * TX events.
 809                  */
 810                 case E_CON_REJ:
 811                         printk(KERN_WARNING "%s: Connection rejected\n",
 812                                dev->name);
 813                         rrpriv->stats.tx_aborted_errors++;
 814                         break;
 815                 case E_CON_TMOUT:
 816                         printk(KERN_WARNING "%s: Connection timeout\n",
 817                                dev->name);
 818                         break;
 819                 case E_DISC_ERR:
 820                         printk(KERN_WARNING "%s: HIPPI disconnect error\n",
 821                                dev->name);
 822                         rrpriv->stats.tx_aborted_errors++;
 823                         break;
 824                 case E_INT_PRTY:
 825                         printk(KERN_ERR "%s: HIPPI Internal Parity error\n",
 826                                dev->name);
 827                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 828                                &regs->HostCtrl);
 829                         wmb();
 830                         break;
 831                 case E_TX_IDLE:
 832                         printk(KERN_WARNING "%s: Transmitter idle\n",
 833                                dev->name);
 834                         break;
 835                 case E_TX_LINK_DROP:
 836                         printk(KERN_WARNING "%s: Link lost during transmit\n",
 837                                dev->name);
 838                         rrpriv->stats.tx_aborted_errors++;
 839                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 840                                &regs->HostCtrl);
 841                         wmb();
 842                         break;
 843                 case E_TX_INV_RNG:
 844                         printk(KERN_ERR "%s: Invalid send ring block\n",
 845                                dev->name);
 846                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 847                                &regs->HostCtrl);
 848                         wmb();
 849                         break;
 850                 case E_TX_INV_BUF:
 851                         printk(KERN_ERR "%s: Invalid send buffer address\n",
 852                                dev->name);
 853                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 854                                &regs->HostCtrl);
 855                         wmb();
 856                         break;
 857                 case E_TX_INV_DSC:
 858                         printk(KERN_ERR "%s: Invalid descriptor address\n",
 859                                dev->name);
 860                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 861                                &regs->HostCtrl);
 862                         wmb();
 863                         break;
 864                 /*
 865                  * RX events.
 866                  */
 867                 case E_RX_RNG_OUT:
 868                         printk(KERN_INFO "%s: Receive ring full\n", dev->name);
 869                         break;
 870
 871                 case E_RX_PAR_ERR:
 872                         printk(KERN_WARNING "%s: Receive parity error\n",
 873                                dev->name);
 874                         goto drop;
 875                 case E_RX_LLRC_ERR:
 876                         printk(KERN_WARNING "%s: Receive LLRC error\n",
 877                                dev->name);
 878                         goto drop;
 879                 case E_PKT_LN_ERR:
 880                         printk(KERN_WARNING "%s: Receive packet length "
 881                                "error\n", dev->name);
 882                         goto drop;
 883                 case E_DTA_CKSM_ERR:
 884                         printk(KERN_WARNING "%s: Data checksum error\n",
 885                                dev->name);
 886                         goto drop;
 887                 case E_SHT_BST:
 888                         printk(KERN_WARNING "%s: Unexpected short burst "
 889                                "error\n", dev->name);
 890                         goto drop;
 891                 case E_STATE_ERR:
 892                         printk(KERN_WARNING "%s: Recv. state transition"
 893                                " error\n", dev->name);
 894                         goto drop;
 895                 case E_UNEXP_DATA:
 896                         printk(KERN_WARNING "%s: Unexpected data error\n",
 897                                dev->name);
 898                         goto drop;
 899                 case E_LST_LNK_ERR:
 900                         printk(KERN_WARNING "%s: Link lost error\n",
 901                                dev->name);
 902                         goto drop;
 903                 case E_FRM_ERR:
 904                         printk(KERN_WARNING "%s: Framming Error\n",
 905                                dev->name);
 906                         goto drop;
 907                 case E_FLG_SYN_ERR:
 908                         printk(KERN_WARNING "%s: Flag sync. lost during"
 909                                "packet\n", dev->name);
 910                         goto drop;
 911                 case E_RX_INV_BUF:
 912                         printk(KERN_ERR "%s: Invalid receive buffer "
 913                                "address\n", dev->name);
 914                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 915                                &regs->HostCtrl);
 916                         wmb();
 917                         break;
 918                 case E_RX_INV_DSC:
 919                         printk(KERN_ERR "%s: Invalid receive descriptor "
 920                                "address\n", dev->name);
 921                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 922                                &regs->HostCtrl);
 923                         wmb();
 924                         break;
 925                 case E_RNG_BLK:
 926                         printk(KERN_ERR "%s: Invalid ring block\n",
 927                                dev->name);
 928                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 929                                &regs->HostCtrl);
 930                         wmb();
 931                         break;
 932                 drop:
 933                         /* Label packet to be dropped.
 934                          * Actual dropping occurs in rx
 935                          * handling.
 936                          *
 937                          * The index of packet we get to drop is
 938                          * the index of the packet following
 939                          * the bad packet. -kbf
 940                          */
 941                         {
 942                                 u16 index = rrpriv->evt_ring[eidx].index;
 943                                 index = (index + (RX_RING_ENTRIES - 1)) %
 944                                         RX_RING_ENTRIES;
 945                                 rrpriv->rx_ring[index].mode |=
 946                                         (PACKET_BAD | PACKET_END);
 947                         }
 948                         break;
 949                 default:
 950                         printk(KERN_WARNING "%s: Unhandled event 0x%02x\n",
 951                                dev->name, rrpriv->evt_ring[eidx].code);
 952                 }
 953                 eidx = (eidx + 1) % EVT_RING_ENTRIES;
 954         }
 955
 956         rrpriv->info->evt_ctrl.pi = eidx;
 957         wmb();
 958         return eidx;
 959 }
 960
 961
 962 static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
 963 {
 964         struct rr_private *rrpriv = netdev_priv(dev);
 965         struct rr_regs *regs = rrpriv->regs;
 966
 967         do {
 968                 struct rx_desc *desc;
 969                 u32 pkt_len;
 970
 971                 desc = &(rrpriv->rx_ring[index]);
 972                 pkt_len = desc->size;
 973 #if (DEBUG > 2)
 974                 printk("index %i, rxlimit %i\n", index, rxlimit);
 975                 printk("len %x, mode %x\n", pkt_len, desc->mode);
 976 #endif
 977                 if ( (rrpriv->rx_ring[index].mode & PACKET_BAD) == PACKET_BAD){
 978                         rrpriv->stats.rx_dropped++;
 979                         goto defer;
 980                 }
 981
 982                 if (pkt_len > 0){
 983                         struct sk_buff *skb, *rx_skb;
 984
 985                         rx_skb = rrpriv->rx_skbuff[index];
 986
 987                         if (pkt_len < PKT_COPY_THRESHOLD) {
 988                                 skb = alloc_skb(pkt_len, GFP_ATOMIC);
 989                                 if (skb == NULL){
 990                                         printk(KERN_WARNING "%s: Unable to allocate skb (%i bytes), deferring packet\n", dev->name, pkt_len);
 991                                         rrpriv->stats.rx_dropped++;
 992                                         goto defer;
 993                                 } else {
 994                                         pci_dma_sync_single_for_cpu(rrpriv->pci_dev,
 995                                                                     desc->addr.addrlo,
 996                                                                     pkt_len,
 997                                                                     PCI_DMA_FROMDEVICE);
 998
 999                                         memcpy(skb_put(skb, pkt_len),
1000                                                rx_skb->data, pkt_len);
1001
1002                                         pci_dma_sync_single_for_device(rrpriv->pci_dev,
1003                                                                        desc->addr.addrlo,
1004                                                                        pkt_len,
1005                                                                        PCI_DMA_FROMDEVICE);
1006                                 }
1007                         }else{
1008                                 struct sk_buff *newskb;
1009
1010                                 newskb = alloc_skb(dev->mtu + HIPPI_HLEN,
1011                                         GFP_ATOMIC);
1012                                 if (newskb){
1013                                         dma_addr_t addr;
1014
1015                                         pci_unmap_single(rrpriv->pci_dev,
1016                                                 desc->addr.addrlo, dev->mtu +
1017                                                 HIPPI_HLEN, PCI_DMA_FROMDEVICE);
1018                                         skb = rx_skb;
1019                                         skb_put(skb, pkt_len);
1020                                         rrpriv->rx_skbuff[index] = newskb;
1021                                         addr = pci_map_single(rrpriv->pci_dev,
1022                                                 newskb->data,
1023                                                 dev->mtu + HIPPI_HLEN,
1024                                                 PCI_DMA_FROMDEVICE);
1025                                         set_rraddr(&desc->addr, addr);
1026                                 } else {
1027                                         printk("%s: Out of memory, deferring "
1028                                                "packet\n", dev->name);
1029                                         rrpriv->stats.rx_dropped++;
1030                                         goto defer;
1031                                 }
1032                         }
1033                         skb->dev = dev;
1034                         skb->protocol = hippi_type_trans(skb, dev);
1035
1036                         netif_rx(skb);          /* send it up */
1037
1038                         dev->last_rx = jiffies;
1039                         rrpriv->stats.rx_packets++;
1040                         rrpriv->stats.rx_bytes += pkt_len;
1041                 }
1042         defer:
1043                 desc->mode = 0;
1044                 desc->size = dev->mtu + HIPPI_HLEN;
1045
1046                 if ((index & 7) == 7)
1047                         writel(index, &regs->IpRxPi);
1048
1049                 index = (index + 1) % RX_RING_ENTRIES;
1050         } while(index != rxlimit);
1051
1052         rrpriv->cur_rx = index;
1053         wmb();
1054 }
1055
1056
1057 static irqreturn_t rr_interrupt(int irq, void *dev_id, struct pt_regs *ptregs)
1058 {
1059         struct rr_private *rrpriv;
1060         struct rr_regs *regs;
1061         struct net_device *dev = (struct net_device *)dev_id;
1062         u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon;
1063
1064         rrpriv = netdev_priv(dev);
1065         regs = rrpriv->regs;
1066
1067         if (!(readl(&regs->HostCtrl) & RR_INT))
1068                 return IRQ_NONE;
1069
1070         spin_lock(&rrpriv->lock);
1071
1072         prodidx = readl(&regs->EvtPrd);
1073         txcsmr = (prodidx >> 8) & 0xff;
1074         rxlimit = (prodidx >> 16) & 0xff;
1075         prodidx &= 0xff;
1076
1077 #if (DEBUG > 2)
1078         printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name,
1079                prodidx, rrpriv->info->evt_ctrl.pi);
1080 #endif
1081         /*
1082          * Order here is important.  We must handle events
1083          * before doing anything else in order to catch
1084          * such things as LLRC errors, etc -kbf
1085          */
1086
1087         eidx = rrpriv->info->evt_ctrl.pi;
1088         if (prodidx != eidx)
1089                 eidx = rr_handle_event(dev, prodidx, eidx);
1090
1091         rxindex = rrpriv->cur_rx;
1092         if (rxindex != rxlimit)
1093                 rx_int(dev, rxlimit, rxindex);
1094
1095         txcon = rrpriv->dirty_tx;
1096         if (txcsmr != txcon) {
1097                 do {
1098                         /* Due to occational firmware TX producer/consumer out
1099                          * of sync. error need to check entry in ring -kbf
1100                          */
1101                         if(rrpriv->tx_skbuff[txcon]){
1102                                 struct tx_desc *desc;
1103                                 struct sk_buff *skb;
1104
1105                                 desc = &(rrpriv->tx_ring[txcon]);
1106                                 skb = rrpriv->tx_skbuff[txcon];
1107
1108                                 rrpriv->stats.tx_packets++;
1109                                 rrpriv->stats.tx_bytes += skb->len;
1110
1111                                 pci_unmap_single(rrpriv->pci_dev,
1112                                                  desc->addr.addrlo, skb->len,
1113                                                  PCI_DMA_TODEVICE);
1114                                 dev_kfree_skb_irq(skb);
1115
1116                                 rrpriv->tx_skbuff[txcon] = NULL;
1117                                 desc->size = 0;
1118                                 set_rraddr(&rrpriv->tx_ring[txcon].addr, 0);
1119                                 desc->mode = 0;
1120                         }
1121                         txcon = (txcon + 1) % TX_RING_ENTRIES;
1122                 } while (txcsmr != txcon);
1123                 wmb();
1124
1125                 rrpriv->dirty_tx = txcon;
1126                 if (rrpriv->tx_full && rr_if_busy(dev) &&
1127                     (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES)
1128                      != rrpriv->dirty_tx)){
1129                         rrpriv->tx_full = 0;
1130                         netif_wake_queue(dev);
1131                 }
1132         }
1133
1134         eidx |= ((txcsmr << 8) | (rxlimit << 16));
1135         writel(eidx, &regs->EvtCon);
1136         wmb();
1137
1138         spin_unlock(&rrpriv->lock);
1139         return IRQ_HANDLED;
1140 }
1141
1142 static void rr_timer(unsigned long data)
1143 {
1144         struct net_device *dev = (struct net_device *)data;
1145         struct rr_private *rrpriv = netdev_priv(dev);
1146         struct rr_regs *regs = rrpriv->regs;
1147         unsigned long flags;
1148
1149         if (readl(&regs->HostCtrl) & NIC_HALTED){
1150                 printk("%s: Restarting nic\n", dev->name);
1151                 memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl));
1152                 memset(rrpriv->info, 0, sizeof(struct rr_info));
1153                 wmb();
1154
1155                 rr_raz_tx(rrpriv, dev);
1156                 rr_raz_rx(rrpriv, dev);
1157
1158                 if (rr_init1(dev)) {
1159                         spin_lock_irqsave(&rrpriv->lock, flags);
1160                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
1161                                &regs->HostCtrl);
1162                         spin_unlock_irqrestore(&rrpriv->lock, flags);
1163                 }
1164         }
1165         rrpriv->timer.expires = RUN_AT(5*HZ);
1166         add_timer(&rrpriv->timer);
1167 }
1168
1169
1170 static int rr_open(struct net_device *dev)
1171 {
1172         struct rr_private *rrpriv = netdev_priv(dev);
1173         struct pci_dev *pdev = rrpriv->pci_dev;
1174         struct rr_regs *regs;
1175         int ecode = 0;
1176         unsigned long flags;
1177         dma_addr_t dma_addr;
1178
1179         regs = rrpriv->regs;
1180
1181         if (rrpriv->fw_rev < 0x00020000) {
1182                 printk(KERN_WARNING "%s: trying to configure device with "
1183                        "obsolete firmware\n", dev->name);
1184                 ecode = -EBUSY;
1185                 goto error;
1186         }
1187
1188         rrpriv->rx_ctrl = pci_alloc_consistent(pdev,
1189                                                256 * sizeof(struct ring_ctrl),
1190                                                &dma_addr);
1191         if (!rrpriv->rx_ctrl) {
1192                 ecode = -ENOMEM;
1193                 goto error;
1194         }
1195         rrpriv->rx_ctrl_dma = dma_addr;
1196         memset(rrpriv->rx_ctrl, 0, 256*sizeof(struct ring_ctrl));
1197
1198         rrpriv->info = pci_alloc_consistent(pdev, sizeof(struct rr_info),
1199                                             &dma_addr);
1200         if (!rrpriv->info) {
1201                 ecode = -ENOMEM;
1202                 goto error;
1203         }
1204         rrpriv->info_dma = dma_addr;
1205         memset(rrpriv->info, 0, sizeof(struct rr_info));
1206         wmb();
1207
1208         spin_lock_irqsave(&rrpriv->lock, flags);
1209         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1210         readl(&regs->HostCtrl);
1211         spin_unlock_irqrestore(&rrpriv->lock, flags);
1212
1213         if (request_irq(dev->irq, rr_interrupt, SA_SHIRQ, dev->name, dev)) {
1214                 printk(KERN_WARNING "%s: Requested IRQ %d is busy\n",
1215                        dev->name, dev->irq);
1216                 ecode = -EAGAIN;
1217                 goto error;
1218         }
1219
1220         if ((ecode = rr_init1(dev)))
1221                 goto error;
1222
1223         /* Set the timer to switch to check for link beat and perhaps switch
1224            to an alternate media type. */
1225         init_timer(&rrpriv->timer);
1226         rrpriv->timer.expires = RUN_AT(5*HZ);           /* 5 sec. watchdog */
1227         rrpriv->timer.data = (unsigned long)dev;
1228         rrpriv->timer.function = &rr_timer;               /* timer handler */
1229         add_timer(&rrpriv->timer);
1230
1231         netif_start_queue(dev);
1232
1233         return ecode;
1234
1235  error:
1236         spin_lock_irqsave(&rrpriv->lock, flags);
1237         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1238         spin_unlock_irqrestore(&rrpriv->lock, flags);
1239
1240         if (rrpriv->info) {
1241                 pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
1242                                     rrpriv->info_dma);
1243                 rrpriv->info = NULL;
1244         }
1245         if (rrpriv->rx_ctrl) {
1246                 pci_free_consistent(pdev, sizeof(struct ring_ctrl),
1247                                     rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1248                 rrpriv->rx_ctrl = NULL;
1249         }
1250
1251         netif_stop_queue(dev);
1252
1253         return ecode;
1254 }
1255
1256
1257 static inline void rr_raz_tx(struct rr_private *rrpriv,
1258                              struct net_device *dev)
1259 {
1260         int i;
1261
1262         for (i = 0; i < TX_RING_ENTRIES; i++) {
1263                 struct sk_buff *skb = rrpriv->tx_skbuff[i];
1264
1265                 if (skb) {
1266                         struct tx_desc *desc = &(rrpriv->tx_ring[i]);
1267
1268                         pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1269                                 skb->len, PCI_DMA_TODEVICE);
1270                         desc->size = 0;
1271                         set_rraddr(&desc->addr, 0);
1272                         dev_kfree_skb(skb);
1273                         rrpriv->tx_skbuff[i] = NULL;
1274                 }
1275         }
1276 }
1277
1278
1279 static inline void rr_raz_rx(struct rr_private *rrpriv,
1280                              struct net_device *dev)
1281 {
1282         int i;
1283
1284         for (i = 0; i < RX_RING_ENTRIES; i++) {
1285                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
1286
1287                 if (skb) {
1288                         struct rx_desc *desc = &(rrpriv->rx_ring[i]);
1289
1290                         pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1291                                 dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
1292                         desc->size = 0;
1293                         set_rraddr(&desc->addr, 0);
1294                         dev_kfree_skb(skb);
1295                         rrpriv->rx_skbuff[i] = NULL;
1296                 }
1297         }
1298 }
1299
1300 static void rr_dump(struct net_device *dev)
1301 {
1302         struct rr_private *rrpriv;
1303         struct rr_regs *regs;
1304         u32 index, cons;
1305         short i;
1306         int len;
1307
1308         rrpriv = netdev_priv(dev);
1309         regs = rrpriv->regs;
1310
1311         printk("%s: dumping NIC TX rings\n", dev->name);
1312
1313         printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n",
1314                readl(&regs->RxPrd), readl(&regs->TxPrd),
1315                readl(&regs->EvtPrd), readl(&regs->TxPi),
1316                rrpriv->info->tx_ctrl.pi);
1317
1318         printk("Error code 0x%x\n", readl(&regs->Fail1));
1319
1320         index = (((readl(&regs->EvtPrd) >> 8) & 0xff ) - 1) % EVT_RING_ENTRIES;
1321         cons = rrpriv->dirty_tx;
1322         printk("TX ring index %i, TX consumer %i\n",
1323                index, cons);
1324
1325         if (rrpriv->tx_skbuff[index]){
1326                 len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len);
1327                 printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size);
1328                 for (i = 0; i < len; i++){
1329                         if (!(i & 7))
1330                                 printk("\n");
1331                         printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]);
1332                 }
1333                 printk("\n");
1334         }
1335
1336         if (rrpriv->tx_skbuff[cons]){
1337                 len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len);
1338                 printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len);
1339                 printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %08lx, truesize 0x%x\n",
1340                        rrpriv->tx_ring[cons].mode,
1341                        rrpriv->tx_ring[cons].size,
1342                        (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo,
1343                        (unsigned long)rrpriv->tx_skbuff[cons]->data,
1344                        (unsigned int)rrpriv->tx_skbuff[cons]->truesize);
1345                 for (i = 0; i < len; i++){
1346                         if (!(i & 7))
1347                                 printk("\n");
1348                         printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size);
1349                 }
1350                 printk("\n");
1351         }
1352
1353         printk("dumping TX ring info:\n");
1354         for (i = 0; i < TX_RING_ENTRIES; i++)
1355                 printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n",
1356                        rrpriv->tx_ring[i].mode,
1357                        rrpriv->tx_ring[i].size,
1358                        (unsigned long long) rrpriv->tx_ring[i].addr.addrlo);
1359
1360 }
1361
1362
1363 static int rr_close(struct net_device *dev)
1364 {
1365         struct rr_private *rrpriv;
1366         struct rr_regs *regs;
1367         unsigned long flags;
1368         u32 tmp;
1369         short i;
1370
1371         netif_stop_queue(dev);
1372
1373         rrpriv = netdev_priv(dev);
1374         regs = rrpriv->regs;
1375
1376         /*
1377          * Lock to make sure we are not cleaning up while another CPU
1378          * is handling interrupts.
1379          */
1380         spin_lock_irqsave(&rrpriv->lock, flags);
1381
1382         tmp = readl(&regs->HostCtrl);
1383         if (tmp & NIC_HALTED){
1384                 printk("%s: NIC already halted\n", dev->name);
1385                 rr_dump(dev);
1386         }else{
1387                 tmp |= HALT_NIC | RR_CLEAR_INT;
1388                 writel(tmp, &regs->HostCtrl);
1389                 readl(&regs->HostCtrl);
1390         }
1391
1392         rrpriv->fw_running = 0;
1393
1394         del_timer_sync(&rrpriv->timer);
1395
1396         writel(0, &regs->TxPi);
1397         writel(0, &regs->IpRxPi);
1398
1399         writel(0, &regs->EvtCon);
1400         writel(0, &regs->EvtPrd);
1401
1402         for (i = 0; i < CMD_RING_ENTRIES; i++)
1403                 writel(0, &regs->CmdRing[i]);
1404
1405         rrpriv->info->tx_ctrl.entries = 0;
1406         rrpriv->info->cmd_ctrl.pi = 0;
1407         rrpriv->info->evt_ctrl.pi = 0;
1408         rrpriv->rx_ctrl[4].entries = 0;
1409
1410         rr_raz_tx(rrpriv, dev);
1411         rr_raz_rx(rrpriv, dev);
1412
1413         pci_free_consistent(rrpriv->pci_dev, 256 * sizeof(struct ring_ctrl),
1414                             rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1415         rrpriv->rx_ctrl = NULL;
1416
1417         pci_free_consistent(rrpriv->pci_dev, sizeof(struct rr_info),
1418                             rrpriv->info, rrpriv->info_dma);
1419         rrpriv->info = NULL;
1420
1421         free_irq(dev->irq, dev);
1422         spin_unlock_irqrestore(&rrpriv->lock, flags);
1423
1424         return 0;
1425 }
1426
1427
1428 static int rr_start_xmit(struct sk_buff *skb, struct net_device *dev)
1429 {
1430         struct rr_private *rrpriv = netdev_priv(dev);
1431         struct rr_regs *regs = rrpriv->regs;
1432         struct ring_ctrl *txctrl;
1433         unsigned long flags;
1434         u32 index, len = skb->len;
1435         u32 *ifield;
1436         struct sk_buff *new_skb;
1437
1438         if (readl(&regs->Mode) & FATAL_ERR)
1439                 printk("error codes Fail1 %02x, Fail2 %02x\n",
1440                        readl(&regs->Fail1), readl(&regs->Fail2));
1441
1442         /*
1443          * We probably need to deal with tbusy here to prevent overruns.
1444          */
1445
1446         if (skb_headroom(skb) < 8){
1447                 printk("incoming skb too small - reallocating\n");
1448                 if (!(new_skb = dev_alloc_skb(len + 8))) {
1449                         dev_kfree_skb(skb);
1450                         netif_wake_queue(dev);
1451                         return -EBUSY;
1452                 }
1453                 skb_reserve(new_skb, 8);
1454                 skb_put(new_skb, len);
1455                 memcpy(new_skb->data, skb->data, len);
1456                 dev_kfree_skb(skb);
1457                 skb = new_skb;
1458         }
1459
1460         ifield = (u32 *)skb_push(skb, 8);
1461
1462         ifield[0] = 0;
1463         ifield[1] = skb->private.ifield;
1464
1465         /*
1466          * We don't need the lock before we are actually going to start
1467          * fiddling with the control blocks.
1468          */
1469         spin_lock_irqsave(&rrpriv->lock, flags);
1470
1471         txctrl = &rrpriv->info->tx_ctrl;
1472
1473         index = txctrl->pi;
1474
1475         rrpriv->tx_skbuff[index] = skb;
1476         set_rraddr(&rrpriv->tx_ring[index].addr, pci_map_single(
1477                 rrpriv->pci_dev, skb->data, len + 8, PCI_DMA_TODEVICE));
1478         rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */
1479         rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END;
1480         txctrl->pi = (index + 1) % TX_RING_ENTRIES;
1481         wmb();
1482         writel(txctrl->pi, &regs->TxPi);
1483
1484         if (txctrl->pi == rrpriv->dirty_tx){
1485                 rrpriv->tx_full = 1;
1486                 netif_stop_queue(dev);
1487         }
1488
1489         spin_unlock_irqrestore(&rrpriv->lock, flags);
1490
1491         dev->trans_start = jiffies;
1492         return 0;
1493 }
1494
1495
1496 static struct net_device_stats *rr_get_stats(struct net_device *dev)
1497 {
1498         struct rr_private *rrpriv;
1499
1500         rrpriv = netdev_priv(dev);
1501
1502         return(&rrpriv->stats);
1503 }
1504
1505
1506 /*
1507  * Read the firmware out of the EEPROM and put it into the SRAM
1508  * (or from user space - later)
1509  *
1510  * This operation requires the NIC to be halted and is performed with
1511  * interrupts disabled and with the spinlock hold.
1512  */
1513 static int rr_load_firmware(struct net_device *dev)
1514 {
1515         struct rr_private *rrpriv;
1516         struct rr_regs *regs;
1517         unsigned long eptr, segptr;
1518         int i, j;
1519         u32 localctrl, sptr, len, tmp;
1520         u32 p2len, p2size, nr_seg, revision, io, sram_size;
1521         struct eeprom *hw = NULL;
1522
1523         rrpriv = netdev_priv(dev);
1524         regs = rrpriv->regs;
1525
1526         if (dev->flags & IFF_UP)
1527                 return -EBUSY;
1528
1529         if (!(readl(&regs->HostCtrl) & NIC_HALTED)){
1530                 printk("%s: Trying to load firmware to a running NIC.\n",
1531                        dev->name);
1532                 return -EBUSY;
1533         }
1534
1535         localctrl = readl(&regs->LocalCtrl);
1536         writel(0, &regs->LocalCtrl);
1537
1538         writel(0, &regs->EvtPrd);
1539         writel(0, &regs->RxPrd);
1540         writel(0, &regs->TxPrd);
1541
1542         /*
1543          * First wipe the entire SRAM, otherwise we might run into all
1544          * kinds of trouble ... sigh, this took almost all afternoon
1545          * to track down ;-(
1546          */
1547         io = readl(&regs->ExtIo);
1548         writel(0, &regs->ExtIo);
1549         sram_size = rr_read_eeprom_word(rrpriv, (void *)8);
1550
1551         for (i = 200; i < sram_size / 4; i++){
1552                 writel(i * 4, &regs->WinBase);
1553                 mb();
1554                 writel(0, &regs->WinData);
1555                 mb();
1556         }
1557         writel(io, &regs->ExtIo);
1558         mb();
1559
1560         eptr = (unsigned long)rr_read_eeprom_word(rrpriv,
1561                                                &hw->rncd_info.AddrRunCodeSegs);
1562         eptr = ((eptr & 0x1fffff) >> 3);
1563
1564         p2len = rr_read_eeprom_word(rrpriv, (void *)(0x83*4));
1565         p2len = (p2len << 2);
1566         p2size = rr_read_eeprom_word(rrpriv, (void *)(0x84*4));
1567         p2size = ((p2size & 0x1fffff) >> 3);
1568
1569         if ((eptr < p2size) || (eptr > (p2size + p2len))){
1570                 printk("%s: eptr is invalid\n", dev->name);
1571                 goto out;
1572         }
1573
1574         revision = rr_read_eeprom_word(rrpriv, &hw->manf.HeaderFmt);
1575
1576         if (revision != 1){
1577                 printk("%s: invalid firmware format (%i)\n",
1578                        dev->name, revision);
1579                 goto out;
1580         }
1581
1582         nr_seg = rr_read_eeprom_word(rrpriv, (void *)eptr);
1583         eptr +=4;
1584 #if (DEBUG > 1)
1585         printk("%s: nr_seg %i\n", dev->name, nr_seg);
1586 #endif
1587
1588         for (i = 0; i < nr_seg; i++){
1589                 sptr = rr_read_eeprom_word(rrpriv, (void *)eptr);
1590                 eptr += 4;
1591                 len = rr_read_eeprom_word(rrpriv, (void *)eptr);
1592                 eptr += 4;
1593                 segptr = (unsigned long)rr_read_eeprom_word(rrpriv, (void *)eptr);
1594                 segptr = ((segptr & 0x1fffff) >> 3);
1595                 eptr += 4;
1596 #if (DEBUG > 1)
1597                 printk("%s: segment %i, sram address %06x, length %04x, segptr %06x\n",
1598                        dev->name, i, sptr, len, segptr);
1599 #endif
1600                 for (j = 0; j < len; j++){
1601                         tmp = rr_read_eeprom_word(rrpriv, (void *)segptr);
1602                         writel(sptr, &regs->WinBase);
1603                         mb();
1604                         writel(tmp, &regs->WinData);
1605                         mb();
1606                         segptr += 4;
1607                         sptr += 4;
1608                 }
1609         }
1610
1611 out:
1612         writel(localctrl, &regs->LocalCtrl);
1613         mb();
1614         return 0;
1615 }
1616
1617
1618 static int rr_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1619 {
1620         struct rr_private *rrpriv;
1621         unsigned char *image, *oldimage;
1622         unsigned long flags;
1623         unsigned int i;
1624         int error = -EOPNOTSUPP;
1625
1626         rrpriv = netdev_priv(dev);
1627
1628         switch(cmd){
1629         case SIOCRRGFW:
1630                 if (!capable(CAP_SYS_RAWIO)){
1631                         return -EPERM;
1632                 }
1633
1634                 image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1635                 if (!image){
1636                         printk(KERN_ERR "%s: Unable to allocate memory "
1637                                "for EEPROM image\n", dev->name);
1638                         return -ENOMEM;
1639                 }
1640
1641
1642                 if (rrpriv->fw_running){
1643                         printk("%s: Firmware already running\n", dev->name);
1644                         error = -EPERM;
1645                         goto gf_out;
1646                 }
1647
1648                 spin_lock_irqsave(&rrpriv->lock, flags);
1649                 i = rr_read_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1650                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1651                 if (i != EEPROM_BYTES){
1652                         printk(KERN_ERR "%s: Error reading EEPROM\n",
1653                                dev->name);
1654                         error = -EFAULT;
1655                         goto gf_out;
1656                 }
1657                 error = copy_to_user(rq->ifr_data, image, EEPROM_BYTES);
1658                 if (error)
1659                         error = -EFAULT;
1660         gf_out:
1661                 kfree(image);
1662                 return error;
1663
1664         case SIOCRRPFW:
1665                 if (!capable(CAP_SYS_RAWIO)){
1666                         return -EPERM;
1667                 }
1668
1669                 image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1670                 oldimage = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1671                 if (!image || !oldimage) {
1672                         printk(KERN_ERR "%s: Unable to allocate memory "
1673                                "for EEPROM image\n", dev->name);
1674                         error = -ENOMEM;
1675                         goto wf_out;
1676                 }
1677
1678                 error = copy_from_user(image, rq->ifr_data, EEPROM_BYTES);
1679                 if (error) {
1680                         error = -EFAULT;
1681                         goto wf_out;
1682                 }
1683
1684                 if (rrpriv->fw_running){
1685                         printk("%s: Firmware already running\n", dev->name);
1686                         error = -EPERM;
1687                         goto wf_out;
1688                 }
1689
1690                 printk("%s: Updating EEPROM firmware\n", dev->name);
1691
1692                 spin_lock_irqsave(&rrpriv->lock, flags);
1693                 error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1694                 if (error)
1695                         printk(KERN_ERR "%s: Error writing EEPROM\n",
1696                                dev->name);
1697
1698                 i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES);
1699                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1700
1701                 if (i != EEPROM_BYTES)
1702                         printk(KERN_ERR "%s: Error reading back EEPROM "
1703                                "image\n", dev->name);
1704
1705                 error = memcmp(image, oldimage, EEPROM_BYTES);
1706                 if (error){
1707                         printk(KERN_ERR "%s: Error verifying EEPROM image\n",
1708                                dev->name);
1709                         error = -EFAULT;
1710                 }
1711         wf_out:
1712                 if (oldimage)
1713                         kfree(oldimage);
1714                 if (image)
1715                         kfree(image);
1716                 return error;
1717
1718         case SIOCRRID:
1719                 return put_user(0x52523032, (int __user *)rq->ifr_data);
1720         default:
1721                 return error;
1722         }
1723 }
1724
1725 static struct pci_device_id rr_pci_tbl[] = {
1726         { PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER,
1727                 PCI_ANY_ID, PCI_ANY_ID, },
1728         { 0,}
1729 };
1730 MODULE_DEVICE_TABLE(pci, rr_pci_tbl);
1731
1732 static struct pci_driver rr_driver = {
1733         .name           = "rrunner",
1734         .id_table       = rr_pci_tbl,
1735         .probe          = rr_init_one,
1736         .remove         = __devexit_p(rr_remove_one),
1737 };
1738
1739 static int __init rr_init_module(void)
1740 {
1741         return pci_module_init(&rr_driver);
1742 }
1743
1744 static void __exit rr_cleanup_module(void)
1745 {
1746         pci_unregister_driver(&rr_driver);
1747 }
1748
1749 module_init(rr_init_module);
1750 module_exit(rr_cleanup_module);
1751
1752 /*
1753  * Local variables:
1754  * compile-command: "gcc -D__KERNEL__ -I../../include -Wall -Wstrict-prototypes -O2 -pipe -fomit-frame-pointer -fno-strength-reduce -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DMODULE -DMODVERSIONS -include ../../include/linux/modversions.h -c rrunner.c"
1755  * End:
1756  */