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   1 /*
   2  * Sun3 i82586 Ethernet driver
   3  *
   4  * Cloned from ni52.c for the Sun3 by Sam Creasey (sammy@sammy.net)
   5  *
   6  * Original copyright follows:
   7  * --------------------------
   8  *
   9  * net-3-driver for the NI5210 card (i82586 Ethernet chip)
  10  *
  11  * This is an extension to the Linux operating system, and is covered by the
  12  * same Gnu Public License that covers that work.
  13  *
  14  * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
  15  * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
  16  * --------------------------
  17  *
  18  * Consult ni52.c for further notes from the original driver.
  19  *
  20  * This incarnation currently supports the OBIO version of the i82586 chip
  21  * used in certain sun3 models.  It should be fairly doable to expand this
  22  * to support VME if I should every acquire such a board.
  23  *
  24  */
  25
  26 static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */
  27 static int automatic_resume = 0; /* experimental .. better should be zero */
  28 static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */
  29 static int fifo=0x8;    /* don't change */
  30
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/string.h>
  34 #include <linux/errno.h>
  35 #include <linux/ioport.h>
  36 #include <linux/slab.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/delay.h>
  39 #include <linux/init.h>
  40 #include <linux/bitops.h>
  41 #include <asm/io.h>
  42 #include <asm/idprom.h>
  43 #include <asm/machines.h>
  44 #include <asm/sun3mmu.h>
  45 #include <asm/dvma.h>
  46 #include <asm/byteorder.h>
  47
  48 #include <linux/netdevice.h>
  49 #include <linux/etherdevice.h>
  50 #include <linux/skbuff.h>
  51
  52 #include "sun3_82586.h"
  53
  54 #define DRV_NAME "sun3_82586"
  55
  56 #define DEBUG       /* debug on */
  57 #define SYSBUSVAL 0 /* 16 Bit */
  58 #define SUN3_82586_TOTAL_SIZE   PAGE_SIZE
  59
  60 #define sun3_attn586()  {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;}
  61 #define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;}
  62 #define sun3_disint()   {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;}
  63 #define sun3_enaint()   {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;}
  64 #define sun3_active()   {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);}
  65
  66 #define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) )
  67 #define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base))
  68 #define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop )))
  69
  70 /******************* how to calculate the buffers *****************************
  71
  72   * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
  73   * --------------- in a different (more stable?) mode. Only in this mode it's
  74   *                 possible to configure the driver with 'NO_NOPCOMMANDS'
  75
  76 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
  77 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
  78 sizeof(rfd) = 24; sizeof(rbd) = 12;
  79 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
  80 sizeof(nop_cmd) = 8;
  81
  82   * if you don't know the driver, better do not change these values: */
  83
  84 #define RECV_BUFF_SIZE 1536 /* slightly oversized */
  85 #define XMIT_BUFF_SIZE 1536 /* slightly oversized */
  86 #define NUM_XMIT_BUFFS 1    /* config for 32K shmem */
  87 #define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */
  88 #define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */
  89 #define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */
  90 #define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */
  91
  92 /**************************************************************************/
  93
  94 /* different DELAYs */
  95 #define DELAY(x) mdelay(32 * x);
  96 #define DELAY_16(); { udelay(16); }
  97 #define DELAY_18(); { udelay(4); }
  98
  99 /* wait for command with timeout: */
 100 #define WAIT_4_SCB_CMD() \
 101 { int i; \
 102   for(i=0;i<16384;i++) { \
 103     if(!p->scb->cmd_cuc) break; \
 104     DELAY_18(); \
 105     if(i == 16383) { \
 106       printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
 107        if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
 108
 109 #define WAIT_4_SCB_CMD_RUC() { int i; \
 110   for(i=0;i<16384;i++) { \
 111     if(!p->scb->cmd_ruc) break; \
 112     DELAY_18(); \
 113     if(i == 16383) { \
 114       printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
 115        if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
 116
 117 #define WAIT_4_STAT_COMPL(addr) { int i; \
 118    for(i=0;i<32767;i++) { \
 119      if(swab16((addr)->cmd_status) & STAT_COMPL) break; \
 120      DELAY_16(); DELAY_16(); } }
 121
 122 static int     sun3_82586_probe1(struct net_device *dev,int ioaddr);
 123 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id);
 124 static int     sun3_82586_open(struct net_device *dev);
 125 static int     sun3_82586_close(struct net_device *dev);
 126 static int     sun3_82586_send_packet(struct sk_buff *,struct net_device *);
 127 static struct  net_device_stats *sun3_82586_get_stats(struct net_device *dev);
 128 static void    set_multicast_list(struct net_device *dev);
 129 static void    sun3_82586_timeout(struct net_device *dev);
 130 #if 0
 131 static void    sun3_82586_dump(struct net_device *,void *);
 132 #endif
 133
 134 /* helper-functions */
 135 static int     init586(struct net_device *dev);
 136 static int     check586(struct net_device *dev,char *where,unsigned size);
 137 static void    alloc586(struct net_device *dev);
 138 static void    startrecv586(struct net_device *dev);
 139 static void   *alloc_rfa(struct net_device *dev,void *ptr);
 140 static void    sun3_82586_rcv_int(struct net_device *dev);
 141 static void    sun3_82586_xmt_int(struct net_device *dev);
 142 static void    sun3_82586_rnr_int(struct net_device *dev);
 143
 144 struct priv
 145 {
 146         struct net_device_stats stats;
 147         unsigned long base;
 148         char *memtop;
 149         long int lock;
 150         int reseted;
 151         volatile struct rfd_struct      *rfd_last,*rfd_top,*rfd_first;
 152         volatile struct scp_struct      *scp;   /* volatile is important */
 153         volatile struct iscp_struct     *iscp;  /* volatile is important */
 154         volatile struct scb_struct      *scb;   /* volatile is important */
 155         volatile struct tbd_struct      *xmit_buffs[NUM_XMIT_BUFFS];
 156         volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
 157 #if (NUM_XMIT_BUFFS == 1)
 158         volatile struct nop_cmd_struct *nop_cmds[2];
 159 #else
 160         volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
 161 #endif
 162         volatile int            nop_point,num_recv_buffs;
 163         volatile char           *xmit_cbuffs[NUM_XMIT_BUFFS];
 164         volatile int            xmit_count,xmit_last;
 165 };
 166
 167 /**********************************************
 168  * close device
 169  */
 170 static int sun3_82586_close(struct net_device *dev)
 171 {
 172         free_irq(dev->irq, dev);
 173
 174         sun3_reset586(); /* the hard way to stop the receiver */
 175
 176         netif_stop_queue(dev);
 177
 178         return 0;
 179 }
 180
 181 /**********************************************
 182  * open device
 183  */
 184 static int sun3_82586_open(struct net_device *dev)
 185 {
 186         int ret;
 187
 188         sun3_disint();
 189         alloc586(dev);
 190         init586(dev);
 191         startrecv586(dev);
 192         sun3_enaint();
 193
 194         ret = request_irq(dev->irq, sun3_82586_interrupt,0,dev->name,dev);
 195         if (ret)
 196         {
 197                 sun3_reset586();
 198                 return ret;
 199         }
 200
 201         netif_start_queue(dev);
 202
 203         return 0; /* most done by init */
 204 }
 205
 206 /**********************************************
 207  * Check to see if there's an 82586 out there.
 208  */
 209 static int check586(struct net_device *dev,char *where,unsigned size)
 210 {
 211         struct priv pb;
 212         struct priv *p = &pb;
 213         char *iscp_addr;
 214         int i;
 215
 216         p->base = (unsigned long) dvma_btov(0);
 217         p->memtop = (char *)dvma_btov((unsigned long)where);
 218         p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
 219         memset((char *)p->scp,0, sizeof(struct scp_struct));
 220         for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
 221                 if(((char *)p->scp)[i])
 222                         return 0;
 223         p->scp->sysbus = SYSBUSVAL;                             /* 1 = 8Bit-Bus, 0 = 16 Bit */
 224         if(p->scp->sysbus != SYSBUSVAL)
 225                 return 0;
 226
 227         iscp_addr = (char *)dvma_btov((unsigned long)where);
 228
 229         p->iscp = (struct iscp_struct *) iscp_addr;
 230         memset((char *)p->iscp,0, sizeof(struct iscp_struct));
 231
 232         p->scp->iscp = make24(p->iscp);
 233         p->iscp->busy = 1;
 234
 235         sun3_reset586();
 236         sun3_attn586();
 237         DELAY(1);       /* wait a while... */
 238
 239         if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
 240                 return 0;
 241
 242         return 1;
 243 }
 244
 245 /******************************************************************
 246  * set iscp at the right place, called by sun3_82586_probe1 and open586.
 247  */
 248 static void alloc586(struct net_device *dev)
 249 {
 250         struct priv *p = netdev_priv(dev);
 251
 252         sun3_reset586();
 253         DELAY(1);
 254
 255         p->scp  = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
 256         p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start);
 257         p->scb  = (struct scb_struct *)  ((char *)p->iscp + sizeof(struct iscp_struct));
 258
 259         memset((char *) p->iscp,0,sizeof(struct iscp_struct));
 260         memset((char *) p->scp ,0,sizeof(struct scp_struct));
 261
 262         p->scp->iscp = make24(p->iscp);
 263         p->scp->sysbus = SYSBUSVAL;
 264         p->iscp->scb_offset = make16(p->scb);
 265         p->iscp->scb_base = make24(dvma_btov(dev->mem_start));
 266
 267         p->iscp->busy = 1;
 268         sun3_reset586();
 269         sun3_attn586();
 270
 271         DELAY(1);
 272
 273         if(p->iscp->busy)
 274                 printk("%s: Init-Problems (alloc).\n",dev->name);
 275
 276         p->reseted = 0;
 277
 278         memset((char *)p->scb,0,sizeof(struct scb_struct));
 279 }
 280
 281 struct net_device * __init sun3_82586_probe(int unit)
 282 {
 283         struct net_device *dev;
 284         unsigned long ioaddr;
 285         static int found = 0;
 286         int err = -ENOMEM;
 287
 288         /* check that this machine has an onboard 82586 */
 289         switch(idprom->id_machtype) {
 290         case SM_SUN3|SM_3_160:
 291         case SM_SUN3|SM_3_260:
 292                 /* these machines have 82586 */
 293                 break;
 294
 295         default:
 296                 return ERR_PTR(-ENODEV);
 297         }
 298
 299         if (found)
 300                 return ERR_PTR(-ENODEV);
 301
 302         ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE);
 303         if (!ioaddr)
 304                 return ERR_PTR(-ENOMEM);
 305         found = 1;
 306
 307         dev = alloc_etherdev(sizeof(struct priv));
 308         if (!dev)
 309                 goto out;
 310         if (unit >= 0) {
 311                 sprintf(dev->name, "eth%d", unit);
 312                 netdev_boot_setup_check(dev);
 313         }
 314
 315         dev->irq = IE_IRQ;
 316         dev->base_addr = ioaddr;
 317         err = sun3_82586_probe1(dev, ioaddr);
 318         if (err)
 319                 goto out1;
 320         err = register_netdev(dev);
 321         if (err)
 322                 goto out2;
 323         return dev;
 324
 325 out2:
 326         release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
 327 out1:
 328         free_netdev(dev);
 329 out:
 330         iounmap((void __iomem *)ioaddr);
 331         return ERR_PTR(err);
 332 }
 333
 334 static const struct net_device_ops sun3_82586_netdev_ops = {
 335         .ndo_open               = sun3_82586_open,
 336         .ndo_stop               = sun3_82586_close,
 337         .ndo_start_xmit         = sun3_82586_send_packet,
 338         .ndo_set_multicast_list = set_multicast_list,
 339         .ndo_tx_timeout         = sun3_82586_timeout,
 340         .ndo_get_stats          = sun3_82586_get_stats,
 341         .ndo_validate_addr      = eth_validate_addr,
 342         .ndo_set_mac_address    = eth_mac_addr,
 343         .ndo_change_mtu         = eth_change_mtu,
 344 };
 345
 346 static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
 347 {
 348         int i, size, retval;
 349
 350         if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))
 351                 return -EBUSY;
 352
 353         /* copy in the ethernet address from the prom */
 354         for(i = 0; i < 6 ; i++)
 355              dev->dev_addr[i] = idprom->id_ethaddr[i];
 356
 357         printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
 358
 359         /*
 360          * check (or search) IO-Memory, 32K
 361          */
 362         size = 0x8000;
 363
 364         dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
 365         dev->mem_end = dev->mem_start + size;
 366
 367         if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
 368                 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
 369                 retval = -ENODEV;
 370                 goto out;
 371         }
 372         if(!check586(dev,(char *) dev->mem_start,size)) {
 373                 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
 374                 retval = -ENODEV;
 375                 goto out;
 376         }
 377
 378         ((struct priv *)netdev_priv(dev))->memtop =
 379                                         (char *)dvma_btov(dev->mem_start);
 380         ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0);
 381         alloc586(dev);
 382
 383         /* set number of receive-buffs according to memsize */
 384         if(size == 0x2000)
 385                 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
 386                                                         NUM_RECV_BUFFS_8;
 387         else if(size == 0x4000)
 388                 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
 389                                                         NUM_RECV_BUFFS_16;
 390         else
 391                 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
 392                                                         NUM_RECV_BUFFS_32;
 393
 394         printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
 395
 396         dev->netdev_ops         = &sun3_82586_netdev_ops;
 397         dev->watchdog_timeo     = HZ/20;
 398
 399         dev->if_port            = 0;
 400         return 0;
 401 out:
 402         release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
 403         return retval;
 404 }
 405
 406
 407 static int init586(struct net_device *dev)
 408 {
 409         void *ptr;
 410         int i,result=0;
 411         struct priv *p = netdev_priv(dev);
 412         volatile struct configure_cmd_struct    *cfg_cmd;
 413         volatile struct iasetup_cmd_struct *ias_cmd;
 414         volatile struct tdr_cmd_struct *tdr_cmd;
 415         volatile struct mcsetup_cmd_struct *mc_cmd;
 416         struct netdev_hw_addr *ha;
 417         int num_addrs=netdev_mc_count(dev);
 418
 419         ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
 420
 421         cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
 422         cfg_cmd->cmd_status     = 0;
 423         cfg_cmd->cmd_cmd        = swab16(CMD_CONFIGURE | CMD_LAST);
 424         cfg_cmd->cmd_link       = 0xffff;
 425
 426         cfg_cmd->byte_cnt       = 0x0a; /* number of cfg bytes */
 427         cfg_cmd->fifo           = fifo; /* fifo-limit (8=tx:32/rx:64) */
 428         cfg_cmd->sav_bf         = 0x40; /* hold or discard bad recv frames (bit 7) */
 429         cfg_cmd->adr_len        = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
 430         cfg_cmd->priority       = 0x00;
 431         cfg_cmd->ifs            = 0x60;
 432         cfg_cmd->time_low       = 0x00;
 433         cfg_cmd->time_high      = 0xf2;
 434         cfg_cmd->promisc        = 0;
 435         if(dev->flags & IFF_ALLMULTI) {
 436                 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
 437                 if(num_addrs > len)     {
 438                         printk("%s: switching to promisc. mode\n",dev->name);
 439                         cfg_cmd->promisc = 1;
 440                 }
 441         }
 442         if(dev->flags&IFF_PROMISC)
 443                 cfg_cmd->promisc = 1;
 444         cfg_cmd->carr_coll      = 0x00;
 445
 446         p->scb->cbl_offset      = make16(cfg_cmd);
 447         p->scb->cmd_ruc         = 0;
 448
 449         p->scb->cmd_cuc         = CUC_START; /* cmd.-unit start */
 450         sun3_attn586();
 451
 452         WAIT_4_STAT_COMPL(cfg_cmd);
 453
 454         if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
 455         {
 456                 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));
 457                 return 1;
 458         }
 459
 460         /*
 461          * individual address setup
 462          */
 463
 464         ias_cmd = (struct iasetup_cmd_struct *)ptr;
 465
 466         ias_cmd->cmd_status     = 0;
 467         ias_cmd->cmd_cmd        = swab16(CMD_IASETUP | CMD_LAST);
 468         ias_cmd->cmd_link       = 0xffff;
 469
 470         memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
 471
 472         p->scb->cbl_offset = make16(ias_cmd);
 473
 474         p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
 475         sun3_attn586();
 476
 477         WAIT_4_STAT_COMPL(ias_cmd);
 478
 479         if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
 480                 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));
 481                 return 1;
 482         }
 483
 484         /*
 485          * TDR, wire check .. e.g. no resistor e.t.c
 486          */
 487
 488         tdr_cmd = (struct tdr_cmd_struct *)ptr;
 489
 490         tdr_cmd->cmd_status     = 0;
 491         tdr_cmd->cmd_cmd        = swab16(CMD_TDR | CMD_LAST);
 492         tdr_cmd->cmd_link       = 0xffff;
 493         tdr_cmd->status         = 0;
 494
 495         p->scb->cbl_offset = make16(tdr_cmd);
 496         p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
 497         sun3_attn586();
 498
 499         WAIT_4_STAT_COMPL(tdr_cmd);
 500
 501         if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))
 502         {
 503                 printk("%s: Problems while running the TDR.\n",dev->name);
 504         }
 505         else
 506         {
 507                 DELAY_16(); /* wait for result */
 508                 result = swab16(tdr_cmd->status);
 509
 510                 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
 511                 sun3_attn586(); /* ack the interrupts */
 512
 513                 if(result & TDR_LNK_OK)
 514                         ;
 515                 else if(result & TDR_XCVR_PRB)
 516                         printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
 517                 else if(result & TDR_ET_OPN)
 518                         printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
 519                 else if(result & TDR_ET_SRT)
 520                 {
 521                         if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
 522                                 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
 523                 }
 524                 else
 525                         printk("%s: TDR: Unknown status %04x\n",dev->name,result);
 526         }
 527
 528         /*
 529          * Multicast setup
 530          */
 531         if(num_addrs && !(dev->flags & IFF_PROMISC) )
 532         {
 533                 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
 534                 mc_cmd->cmd_status = 0;
 535                 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);
 536                 mc_cmd->cmd_link = 0xffff;
 537                 mc_cmd->mc_cnt = swab16(num_addrs * 6);
 538
 539                 i = 0;
 540                 netdev_for_each_mc_addr(ha, dev)
 541                         memcpy((char *) mc_cmd->mc_list[i++],
 542                                ha->addr, ETH_ALEN);
 543
 544                 p->scb->cbl_offset = make16(mc_cmd);
 545                 p->scb->cmd_cuc = CUC_START;
 546                 sun3_attn586();
 547
 548                 WAIT_4_STAT_COMPL(mc_cmd);
 549
 550                 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
 551                         printk("%s: Can't apply multicast-address-list.\n",dev->name);
 552         }
 553
 554         /*
 555          * alloc nop/xmit-cmds
 556          */
 557 #if (NUM_XMIT_BUFFS == 1)
 558         for(i=0;i<2;i++)
 559         {
 560                 p->nop_cmds[i]                  = (struct nop_cmd_struct *)ptr;
 561                 p->nop_cmds[i]->cmd_cmd         = swab16(CMD_NOP);
 562                 p->nop_cmds[i]->cmd_status      = 0;
 563                 p->nop_cmds[i]->cmd_link        = make16((p->nop_cmds[i]));
 564                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 565         }
 566 #else
 567         for(i=0;i<NUM_XMIT_BUFFS;i++)
 568         {
 569                 p->nop_cmds[i]                  = (struct nop_cmd_struct *)ptr;
 570                 p->nop_cmds[i]->cmd_cmd         = swab16(CMD_NOP);
 571                 p->nop_cmds[i]->cmd_status      = 0;
 572                 p->nop_cmds[i]->cmd_link        = make16((p->nop_cmds[i]));
 573                 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
 574         }
 575 #endif
 576
 577         ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */
 578
 579         /*
 580          * alloc xmit-buffs / init xmit_cmds
 581          */
 582         for(i=0;i<NUM_XMIT_BUFFS;i++)
 583         {
 584                 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
 585                 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
 586                 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
 587                 ptr = (char *) ptr + XMIT_BUFF_SIZE;
 588                 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
 589                 ptr = (char *) ptr + sizeof(struct tbd_struct);
 590                 if((void *)ptr > (void *)dev->mem_end)
 591                 {
 592                         printk("%s: not enough shared-mem for your configuration!\n",dev->name);
 593                         return 1;
 594                 }
 595                 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
 596                 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
 597                 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
 598                 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
 599                 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
 600                 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
 601                 p->xmit_buffs[i]->next = 0xffff;
 602                 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
 603         }
 604
 605         p->xmit_count = 0;
 606         p->xmit_last    = 0;
 607 #ifndef NO_NOPCOMMANDS
 608         p->nop_point    = 0;
 609 #endif
 610
 611          /*
 612                 * 'start transmitter'
 613                 */
 614 #ifndef NO_NOPCOMMANDS
 615         p->scb->cbl_offset = make16(p->nop_cmds[0]);
 616         p->scb->cmd_cuc = CUC_START;
 617         sun3_attn586();
 618         WAIT_4_SCB_CMD();
 619 #else
 620         p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
 621         p->xmit_cmds[0]->cmd_cmd        = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
 622 #endif
 623
 624         /*
 625          * ack. interrupts
 626          */
 627         p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
 628         sun3_attn586();
 629         DELAY_16();
 630
 631         sun3_enaint();
 632         sun3_active();
 633
 634         return 0;
 635 }
 636
 637 /******************************************************
 638  * This is a helper routine for sun3_82586_rnr_int() and init586().
 639  * It sets up the Receive Frame Area (RFA).
 640  */
 641
 642 static void *alloc_rfa(struct net_device *dev,void *ptr)
 643 {
 644         volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
 645         volatile struct rbd_struct *rbd;
 646         int i;
 647         struct priv *p = netdev_priv(dev);
 648
 649         memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
 650         p->rfd_first = rfd;
 651
 652         for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
 653                 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
 654                 rfd[i].rbd_offset = 0xffff;
 655         }
 656         rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP;         /* RU suspend */
 657
 658         ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
 659
 660         rbd = (struct rbd_struct *) ptr;
 661         ptr = (void *) (rbd + p->num_recv_buffs);
 662
 663          /* clr descriptors */
 664         memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
 665
 666         for(i=0;i<p->num_recv_buffs;i++)
 667         {
 668                 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
 669                 rbd[i].size = swab16(RECV_BUFF_SIZE);
 670                 rbd[i].buffer = make24(ptr);
 671                 ptr = (char *) ptr + RECV_BUFF_SIZE;
 672         }
 673
 674         p->rfd_top      = p->rfd_first;
 675         p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
 676
 677         p->scb->rfa_offset              = make16(p->rfd_first);
 678         p->rfd_first->rbd_offset        = make16(rbd);
 679
 680         return ptr;
 681 }
 682
 683
 684 /**************************************************
 685  * Interrupt Handler ...
 686  */
 687
 688 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)
 689 {
 690         struct net_device *dev = dev_id;
 691         unsigned short stat;
 692         int cnt=0;
 693         struct priv *p;
 694
 695         if (!dev) {
 696                 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
 697                 return IRQ_NONE;
 698         }
 699         p = netdev_priv(dev);
 700
 701         if(debuglevel > 1)
 702                 printk("I");
 703
 704         WAIT_4_SCB_CMD(); /* wait for last command      */
 705
 706         while((stat=p->scb->cus & STAT_MASK))
 707         {
 708                 p->scb->cmd_cuc = stat;
 709                 sun3_attn586();
 710
 711                 if(stat & STAT_FR)       /* received a frame */
 712                         sun3_82586_rcv_int(dev);
 713
 714                 if(stat & STAT_RNR) /* RU went 'not ready' */
 715                 {
 716                         printk("(R)");
 717                         if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
 718                         {
 719                                 WAIT_4_SCB_CMD();
 720                                 p->scb->cmd_ruc = RUC_RESUME;
 721                                 sun3_attn586();
 722                                 WAIT_4_SCB_CMD_RUC();
 723                         }
 724                         else
 725                         {
 726                                 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
 727                                 sun3_82586_rnr_int(dev);
 728                         }
 729                 }
 730
 731                 if(stat & STAT_CX)              /* command with I-bit set complete */
 732                          sun3_82586_xmt_int(dev);
 733
 734 #ifndef NO_NOPCOMMANDS
 735                 if(stat & STAT_CNA)     /* CU went 'not ready' */
 736                 {
 737                         if(netif_running(dev))
 738                                 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
 739                 }
 740 #endif
 741
 742                 if(debuglevel > 1)
 743                         printk("%d",cnt++);
 744
 745                 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
 746                 if(p->scb->cmd_cuc)      /* timed out? */
 747                 {
 748                         printk("%s: Acknowledge timed out.\n",dev->name);
 749                         sun3_disint();
 750                         break;
 751                 }
 752         }
 753
 754         if(debuglevel > 1)
 755                 printk("i");
 756         return IRQ_HANDLED;
 757 }
 758
 759 /*******************************************************
 760  * receive-interrupt
 761  */
 762
 763 static void sun3_82586_rcv_int(struct net_device *dev)
 764 {
 765         int status,cnt=0;
 766         unsigned short totlen;
 767         struct sk_buff *skb;
 768         struct rbd_struct *rbd;
 769         struct priv *p = netdev_priv(dev);
 770
 771         if(debuglevel > 0)
 772                 printk("R");
 773
 774         for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
 775         {
 776                         rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
 777
 778                         if(status & RFD_OK) /* frame received without error? */
 779                         {
 780                                 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
 781                                 {
 782                                         totlen &= RBD_MASK; /* length of this frame */
 783                                         rbd->status = 0;
 784                                         skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
 785                                         if(skb != NULL)
 786                                         {
 787                                                 skb_reserve(skb,2);
 788                                                 skb_put(skb,totlen);
 789                                                 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);
 790                                                 skb->protocol=eth_type_trans(skb,dev);
 791                                                 netif_rx(skb);
 792                                                 p->stats.rx_packets++;
 793                                         }
 794                                         else
 795                                                 p->stats.rx_dropped++;
 796                                 }
 797                                 else
 798                                 {
 799                                         int rstat;
 800                                                  /* free all RBD's until RBD_LAST is set */
 801                                         totlen = 0;
 802                                         while(!((rstat=swab16(rbd->status)) & RBD_LAST))
 803                                         {
 804                                                 totlen += rstat & RBD_MASK;
 805                                                 if(!rstat)
 806                                                 {
 807                                                         printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
 808                                                         break;
 809                                                 }
 810                                                 rbd->status = 0;
 811                                                 rbd = (struct rbd_struct *) make32(rbd->next);
 812                                         }
 813                                         totlen += rstat & RBD_MASK;
 814                                         rbd->status = 0;
 815                                         printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
 816                                         p->stats.rx_dropped++;
 817                          }
 818                 }
 819                 else /* frame !(ok), only with 'save-bad-frames' */
 820                 {
 821                         printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
 822                         p->stats.rx_errors++;
 823                 }
 824                 p->rfd_top->stat_high = 0;
 825                 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
 826                 p->rfd_top->rbd_offset = 0xffff;
 827                 p->rfd_last->last = 0;                          /* delete RFD_SUSP      */
 828                 p->rfd_last = p->rfd_top;
 829                 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
 830                 p->scb->rfa_offset = make16(p->rfd_top);
 831
 832                 if(debuglevel > 0)
 833                         printk("%d",cnt++);
 834         }
 835
 836         if(automatic_resume)
 837         {
 838                 WAIT_4_SCB_CMD();
 839                 p->scb->cmd_ruc = RUC_RESUME;
 840                 sun3_attn586();
 841                 WAIT_4_SCB_CMD_RUC();
 842         }
 843
 844 #ifdef WAIT_4_BUSY
 845         {
 846                 int i;
 847                 for(i=0;i<1024;i++)
 848                 {
 849                         if(p->rfd_top->status)
 850                                 break;
 851                         DELAY_16();
 852                         if(i == 1023)
 853                                 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
 854                 }
 855         }
 856 #endif
 857
 858 #if 0
 859         if(!at_least_one)
 860         {
 861                 int i;
 862                 volatile struct rfd_struct *rfds=p->rfd_top;
 863                 volatile struct rbd_struct *rbds;
 864                 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
 865                 for(i=0;i< (p->num_recv_buffs+4);i++)
 866                 {
 867                         rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
 868                         printk("%04x:%04x ",rfds->status,rbds->status);
 869                         rfds = (struct rfd_struct *) make32(rfds->next);
 870                 }
 871                 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
 872                 printk("\nerrs: %04x %04x rus: %02x, cus: %02x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->rus,(int)p->scb->cus);
 873         }
 874         old_at_least = at_least_one;
 875 #endif
 876
 877         if(debuglevel > 0)
 878                 printk("r");
 879 }
 880
 881 /**********************************************************
 882  * handle 'Receiver went not ready'.
 883  */
 884
 885 static void sun3_82586_rnr_int(struct net_device *dev)
 886 {
 887         struct priv *p = netdev_priv(dev);
 888
 889         p->stats.rx_errors++;
 890
 891         WAIT_4_SCB_CMD();               /* wait for the last cmd, WAIT_4_FULLSTAT?? */
 892         p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
 893         sun3_attn586();
 894         WAIT_4_SCB_CMD_RUC();           /* wait for accept cmd. */
 895
 896         alloc_rfa(dev,(char *)p->rfd_first);
 897 /* maybe add a check here, before restarting the RU */
 898         startrecv586(dev); /* restart RU */
 899
 900         printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
 901
 902 }
 903
 904 /**********************************************************
 905  * handle xmit - interrupt
 906  */
 907
 908 static void sun3_82586_xmt_int(struct net_device *dev)
 909 {
 910         int status;
 911         struct priv *p = netdev_priv(dev);
 912
 913         if(debuglevel > 0)
 914                 printk("X");
 915
 916         status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
 917         if(!(status & STAT_COMPL))
 918                 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
 919
 920         if(status & STAT_OK)
 921         {
 922                 p->stats.tx_packets++;
 923                 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
 924         }
 925         else
 926         {
 927                 p->stats.tx_errors++;
 928                 if(status & TCMD_LATECOLL) {
 929                         printk("%s: late collision detected.\n",dev->name);
 930                         p->stats.collisions++;
 931                 }
 932                 else if(status & TCMD_NOCARRIER) {
 933                         p->stats.tx_carrier_errors++;
 934                         printk("%s: no carrier detected.\n",dev->name);
 935                 }
 936                 else if(status & TCMD_LOSTCTS)
 937                         printk("%s: loss of CTS detected.\n",dev->name);
 938                 else if(status & TCMD_UNDERRUN) {
 939                         p->stats.tx_fifo_errors++;
 940                         printk("%s: DMA underrun detected.\n",dev->name);
 941                 }
 942                 else if(status & TCMD_MAXCOLL) {
 943                         printk("%s: Max. collisions exceeded.\n",dev->name);
 944                         p->stats.collisions += 16;
 945                 }
 946         }
 947
 948 #if (NUM_XMIT_BUFFS > 1)
 949         if( (++p->xmit_last) == NUM_XMIT_BUFFS)
 950                 p->xmit_last = 0;
 951 #endif
 952         netif_wake_queue(dev);
 953 }
 954
 955 /***********************************************************
 956  * (re)start the receiver
 957  */
 958
 959 static void startrecv586(struct net_device *dev)
 960 {
 961         struct priv *p = netdev_priv(dev);
 962
 963         WAIT_4_SCB_CMD();
 964         WAIT_4_SCB_CMD_RUC();
 965         p->scb->rfa_offset = make16(p->rfd_first);
 966         p->scb->cmd_ruc = RUC_START;
 967         sun3_attn586();         /* start cmd. */
 968         WAIT_4_SCB_CMD_RUC();   /* wait for accept cmd. (no timeout!!) */
 969 }
 970
 971 static void sun3_82586_timeout(struct net_device *dev)
 972 {
 973         struct priv *p = netdev_priv(dev);
 974 #ifndef NO_NOPCOMMANDS
 975         if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
 976         {
 977                 netif_wake_queue(dev);
 978 #ifdef DEBUG
 979                 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
 980                 printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev->name,(int)swab16(p->xmit_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[1]->cmd_status),(int)p->nop_point);
 981 #endif
 982                 p->scb->cmd_cuc = CUC_ABORT;
 983                 sun3_attn586();
 984                 WAIT_4_SCB_CMD();
 985                 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
 986                 p->scb->cmd_cuc = CUC_START;
 987                 sun3_attn586();
 988                 WAIT_4_SCB_CMD();
 989                 dev->trans_start = jiffies;
 990                 return 0;
 991         }
 992 #endif
 993         {
 994 #ifdef DEBUG
 995                 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
 996                 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
 997                 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
 998 #endif
 999                 sun3_82586_close(dev);
1000                 sun3_82586_open(dev);
1001         }
1002         dev->trans_start = jiffies;
1003 }
1004
1005 /******************************************************
1006  * send frame
1007  */
1008
1009 static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
1010 {
1011         int len,i;
1012 #ifndef NO_NOPCOMMANDS
1013         int next_nop;
1014 #endif
1015         struct priv *p = netdev_priv(dev);
1016
1017         if(skb->len > XMIT_BUFF_SIZE)
1018         {
1019                 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1020                 return NETDEV_TX_OK;
1021         }
1022
1023         netif_stop_queue(dev);
1024
1025 #if(NUM_XMIT_BUFFS > 1)
1026         if(test_and_set_bit(0,(void *) &p->lock)) {
1027                 printk("%s: Queue was locked\n",dev->name);
1028                 return NETDEV_TX_BUSY;
1029         }
1030         else
1031 #endif
1032         {
1033                 len = skb->len;
1034                 if (len < ETH_ZLEN) {
1035                         memset((void *)p->xmit_cbuffs[p->xmit_count], 0,
1036                                ETH_ZLEN);
1037                         len = ETH_ZLEN;
1038                 }
1039                 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);
1040
1041 #if (NUM_XMIT_BUFFS == 1)
1042 #       ifdef NO_NOPCOMMANDS
1043
1044 #ifdef DEBUG
1045                 if(p->scb->cus & CU_ACTIVE)
1046                 {
1047                         printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1048                         printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1049                 }
1050 #endif
1051
1052                 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1053                 for(i=0;i<16;i++)
1054                 {
1055                         p->xmit_cmds[0]->cmd_status = 0;
1056                         WAIT_4_SCB_CMD();
1057                         if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1058                                 p->scb->cmd_cuc = CUC_RESUME;
1059                         else
1060                         {
1061                                 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1062                                 p->scb->cmd_cuc = CUC_START;
1063                         }
1064
1065                         sun3_attn586();
1066                         dev->trans_start = jiffies;
1067                         if(!i)
1068                                 dev_kfree_skb(skb);
1069                         WAIT_4_SCB_CMD();
1070                         if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1071                                 break;
1072                         if(p->xmit_cmds[0]->cmd_status)
1073                                 break;
1074                         if(i==15)
1075                                 printk("%s: Can't start transmit-command.\n",dev->name);
1076                 }
1077 #       else
1078                 next_nop = (p->nop_point + 1) & 0x1;
1079                 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1080
1081                 p->xmit_cmds[0]->cmd_link        = p->nop_cmds[next_nop]->cmd_link
1082                         = make16((p->nop_cmds[next_nop]));
1083                 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1084
1085                 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1086                 dev->trans_start = jiffies;
1087                 p->nop_point = next_nop;
1088                 dev_kfree_skb(skb);
1089 #       endif
1090 #else
1091                 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1092                 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1093                         next_nop = 0;
1094
1095                 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1096                 /* linkpointer of xmit-command already points to next nop cmd */
1097                 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1098                 p->nop_cmds[next_nop]->cmd_status = 0;
1099
1100                 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1101                 dev->trans_start = jiffies;
1102                 p->xmit_count = next_nop;
1103
1104                 {
1105                         unsigned long flags;
1106                         local_irq_save(flags);
1107                         if(p->xmit_count != p->xmit_last)
1108                                 netif_wake_queue(dev);
1109                         p->lock = 0;
1110                         local_irq_restore(flags);
1111                 }
1112                 dev_kfree_skb(skb);
1113 #endif
1114         }
1115         return NETDEV_TX_OK;
1116 }
1117
1118 /*******************************************
1119  * Someone wanna have the statistics
1120  */
1121
1122 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
1123 {
1124         struct priv *p = netdev_priv(dev);
1125         unsigned short crc,aln,rsc,ovrn;
1126
1127         crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
1128         p->scb->crc_errs = 0;
1129         aln = swab16(p->scb->aln_errs);
1130         p->scb->aln_errs = 0;
1131         rsc = swab16(p->scb->rsc_errs);
1132         p->scb->rsc_errs = 0;
1133         ovrn = swab16(p->scb->ovrn_errs);
1134         p->scb->ovrn_errs = 0;
1135
1136         p->stats.rx_crc_errors += crc;
1137         p->stats.rx_fifo_errors += ovrn;
1138         p->stats.rx_frame_errors += aln;
1139         p->stats.rx_dropped += rsc;
1140
1141         return &p->stats;
1142 }
1143
1144 /********************************************************
1145  * Set MC list ..
1146  */
1147
1148 static void set_multicast_list(struct net_device *dev)
1149 {
1150         netif_stop_queue(dev);
1151         sun3_disint();
1152         alloc586(dev);
1153         init586(dev);
1154         startrecv586(dev);
1155         sun3_enaint();
1156         netif_wake_queue(dev);
1157 }
1158
1159 #ifdef MODULE
1160 #error This code is not currently supported as a module
1161 static struct net_device *dev_sun3_82586;
1162
1163 int init_module(void)
1164 {
1165         dev_sun3_82586 = sun3_82586_probe(-1);
1166         if (IS_ERR(dev_sun3_82586))
1167                 return PTR_ERR(dev_sun3_82586);
1168         return 0;
1169 }
1170
1171 void cleanup_module(void)
1172 {
1173         unsigned long ioaddr = dev_sun3_82586->base_addr;
1174         unregister_netdev(dev_sun3_82586);
1175         release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
1176         iounmap((void *)ioaddr);
1177         free_netdev(dev_sun3_82586);
1178 }
1179 #endif /* MODULE */
1180
1181 #if 0
1182 /*
1183  * DUMP .. we expect a not running CMD unit and enough space
1184  */
1185 void sun3_82586_dump(struct net_device *dev,void *ptr)
1186 {
1187         struct priv *p = netdev_priv(dev);
1188         struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1189         int i;
1190
1191         p->scb->cmd_cuc = CUC_ABORT;
1192         sun3_attn586();
1193         WAIT_4_SCB_CMD();
1194         WAIT_4_SCB_CMD_RUC();
1195
1196         dump_cmd->cmd_status = 0;
1197         dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1198         dump_cmd->dump_offset = make16((dump_cmd + 1));
1199         dump_cmd->cmd_link = 0xffff;
1200
1201         p->scb->cbl_offset = make16(dump_cmd);
1202         p->scb->cmd_cuc = CUC_START;
1203         sun3_attn586();
1204         WAIT_4_STAT_COMPL(dump_cmd);
1205
1206         if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1207                                 printk("%s: Can't get dump information.\n",dev->name);
1208
1209         for(i=0;i<170;i++) {
1210                 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1211                 if(i % 24 == 23)
1212                         printk("\n");
1213         }
1214         printk("\n");
1215 }
1216 #endif
1217
1218 MODULE_LICENSE("GPL");