drivers/net/ethernet/i825xx/82596.c

   1 /* 82596.c: A generic 82596 ethernet driver for linux. */
   2 /*
   3    Based on Apricot.c
   4    Written 1994 by Mark Evans.
   5    This driver is for the Apricot 82596 bus-master interface
   6
   7    Modularised 12/94 Mark Evans
   8
   9
  10    Modified to support the 82596 ethernet chips on 680x0 VME boards.
  11    by Richard Hirst <richard@sleepie.demon.co.uk>
  12    Renamed to be 82596.c
  13
  14    980825:  Changed to receive directly in to sk_buffs which are
  15    allocated at open() time.  Eliminates copy on incoming frames
  16    (small ones are still copied).  Shared data now held in a
  17    non-cached page, so we can run on 68060 in copyback mode.
  18
  19    TBD:
  20    * look at deferring rx frames rather than discarding (as per tulip)
  21    * handle tx ring full as per tulip
  22    * performance test to tune rx_copybreak
  23
  24    Most of my modifications relate to the braindead big-endian
  25    implementation by Intel.  When the i596 is operating in
  26    'big-endian' mode, it thinks a 32 bit value of 0x12345678
  27    should be stored as 0x56781234.  This is a real pain, when
  28    you have linked lists which are shared by the 680x0 and the
  29    i596.
  30
  31    Driver skeleton
  32    Written 1993 by Donald Becker.
  33    Copyright 1993 United States Government as represented by the Director,
  34    National Security Agency. This software may only be used and distributed
  35    according to the terms of the GNU General Public License as modified by SRC,
  36    incorporated herein by reference.
  37
  38    The author may be reached as becker@scyld.com, or C/O
  39    Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
  40
  41  */
  42
  43 #include <linux/module.h>
  44 #include <linux/kernel.h>
  45 #include <linux/string.h>
  46 #include <linux/errno.h>
  47 #include <linux/ioport.h>
  48 #include <linux/interrupt.h>
  49 #include <linux/delay.h>
  50 #include <linux/netdevice.h>
  51 #include <linux/etherdevice.h>
  52 #include <linux/skbuff.h>
  53 #include <linux/init.h>
  54 #include <linux/bitops.h>
  55 #include <linux/gfp.h>
  56
  57 #include <asm/io.h>
  58 #include <asm/dma.h>
  59 #include <asm/pgtable.h>
  60 #include <asm/cacheflush.h>
  61
  62 static char version[] __initdata =
  63         "82596.c $Revision: 1.5 $\n";
  64
  65 #define DRV_NAME        "82596"
  66
  67 /* DEBUG flags
  68  */
  69
  70 #define DEB_INIT        0x0001
  71 #define DEB_PROBE       0x0002
  72 #define DEB_SERIOUS     0x0004
  73 #define DEB_ERRORS      0x0008
  74 #define DEB_MULTI       0x0010
  75 #define DEB_TDR         0x0020
  76 #define DEB_OPEN        0x0040
  77 #define DEB_RESET       0x0080
  78 #define DEB_ADDCMD      0x0100
  79 #define DEB_STATUS      0x0200
  80 #define DEB_STARTTX     0x0400
  81 #define DEB_RXADDR      0x0800
  82 #define DEB_TXADDR      0x1000
  83 #define DEB_RXFRAME     0x2000
  84 #define DEB_INTS        0x4000
  85 #define DEB_STRUCT      0x8000
  86 #define DEB_ANY         0xffff
  87
  88
  89 #define DEB(x,y)        if (i596_debug & (x)) y
  90
  91
  92 #if IS_ENABLED(CONFIG_MVME16x_NET)
  93 #define ENABLE_MVME16x_NET
  94 #endif
  95 #if IS_ENABLED(CONFIG_BVME6000_NET)
  96 #define ENABLE_BVME6000_NET
  97 #endif
  98
  99 #ifdef ENABLE_MVME16x_NET
 100 #include <asm/mvme16xhw.h>
 101 #endif
 102 #ifdef ENABLE_BVME6000_NET
 103 #include <asm/bvme6000hw.h>
 104 #endif
 105
 106 /*
 107  * Define various macros for Channel Attention, word swapping etc., dependent
 108  * on architecture.  MVME and BVME are 680x0 based, otherwise it is Intel.
 109  */
 110
 111 #ifdef __mc68000__
 112 #define WSWAPrfd(x)  ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 113 #define WSWAPrbd(x)  ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 114 #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
 115 #define WSWAPscb(x)  ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 116 #define WSWAPcmd(x)  ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 117 #define WSWAPtbd(x)  ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 118 #define WSWAPchar(x) ((char *)            (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 119 #define ISCP_BUSY       0x00010000
 120 #else
 121 #error 82596.c: unknown architecture
 122 #endif
 123
 124 /*
 125  * These were the intel versions, left here for reference. There
 126  * are currently no x86 users of this legacy i82596 chip.
 127  */
 128 #if 0
 129 #define WSWAPrfd(x)     ((struct i596_rfd *)((long)x))
 130 #define WSWAPrbd(x)     ((struct i596_rbd *)((long)x))
 131 #define WSWAPiscp(x)    ((struct i596_iscp *)((long)x))
 132 #define WSWAPscb(x)     ((struct i596_scb *)((long)x))
 133 #define WSWAPcmd(x)     ((struct i596_cmd *)((long)x))
 134 #define WSWAPtbd(x)     ((struct i596_tbd *)((long)x))
 135 #define WSWAPchar(x)    ((char *)((long)x))
 136 #define ISCP_BUSY       0x0001
 137 #endif
 138
 139 /*
 140  * The MPU_PORT command allows direct access to the 82596. With PORT access
 141  * the following commands are available (p5-18). The 32-bit port command
 142  * must be word-swapped with the most significant word written first.
 143  * This only applies to VME boards.
 144  */
 145 #define PORT_RESET              0x00    /* reset 82596 */
 146 #define PORT_SELFTEST           0x01    /* selftest */
 147 #define PORT_ALTSCP             0x02    /* alternate SCB address */
 148 #define PORT_ALTDUMP            0x03    /* Alternate DUMP address */
 149
 150 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
 151
 152 MODULE_AUTHOR("Richard Hirst");
 153 MODULE_DESCRIPTION("i82596 driver");
 154 MODULE_LICENSE("GPL");
 155
 156 module_param(i596_debug, int, 0);
 157 MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
 158
 159
 160 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
 161  * a full sized sk_buff.  Value of 100 stolen from tulip.c (!alpha).
 162  */
 163 static int rx_copybreak = 100;
 164
 165 #define PKT_BUF_SZ      1536
 166 #define MAX_MC_CNT      64
 167
 168 #define I596_TOTAL_SIZE 17
 169
 170 #define I596_NULL ((void *)0xffffffff)
 171
 172 #define CMD_EOL         0x8000  /* The last command of the list, stop. */
 173 #define CMD_SUSP        0x4000  /* Suspend after doing cmd. */
 174 #define CMD_INTR        0x2000  /* Interrupt after doing cmd. */
 175
 176 #define CMD_FLEX        0x0008  /* Enable flexible memory model */
 177
 178 enum commands {
 179         CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
 180         CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
 181 };
 182
 183 #define STAT_C          0x8000  /* Set to 0 after execution */
 184 #define STAT_B          0x4000  /* Command being executed */
 185 #define STAT_OK         0x2000  /* Command executed ok */
 186 #define STAT_A          0x1000  /* Command aborted */
 187
 188 #define  CUC_START      0x0100
 189 #define  CUC_RESUME     0x0200
 190 #define  CUC_SUSPEND    0x0300
 191 #define  CUC_ABORT      0x0400
 192 #define  RX_START       0x0010
 193 #define  RX_RESUME      0x0020
 194 #define  RX_SUSPEND     0x0030
 195 #define  RX_ABORT       0x0040
 196
 197 #define TX_TIMEOUT      (HZ/20)
 198
 199
 200 struct i596_reg {
 201         unsigned short porthi;
 202         unsigned short portlo;
 203         unsigned long ca;
 204 };
 205
 206 #define EOF             0x8000
 207 #define SIZE_MASK       0x3fff
 208
 209 struct i596_tbd {
 210         unsigned short size;
 211         unsigned short pad;
 212         struct i596_tbd *next;
 213         char *data;
 214 };
 215
 216 /* The command structure has two 'next' pointers; v_next is the address of
 217  * the next command as seen by the CPU, b_next is the address of the next
 218  * command as seen by the 82596.  The b_next pointer, as used by the 82596
 219  * always references the status field of the next command, rather than the
 220  * v_next field, because the 82596 is unaware of v_next.  It may seem more
 221  * logical to put v_next at the end of the structure, but we cannot do that
 222  * because the 82596 expects other fields to be there, depending on command
 223  * type.
 224  */
 225
 226 struct i596_cmd {
 227         struct i596_cmd *v_next;        /* Address from CPUs viewpoint */
 228         unsigned short status;
 229         unsigned short command;
 230         struct i596_cmd *b_next;        /* Address from i596 viewpoint */
 231 };
 232
 233 struct tx_cmd {
 234         struct i596_cmd cmd;
 235         struct i596_tbd *tbd;
 236         unsigned short size;
 237         unsigned short pad;
 238         struct sk_buff *skb;    /* So we can free it after tx */
 239 };
 240
 241 struct tdr_cmd {
 242         struct i596_cmd cmd;
 243         unsigned short status;
 244         unsigned short pad;
 245 };
 246
 247 struct mc_cmd {
 248         struct i596_cmd cmd;
 249         short mc_cnt;
 250         char mc_addrs[MAX_MC_CNT*6];
 251 };
 252
 253 struct sa_cmd {
 254         struct i596_cmd cmd;
 255         char eth_addr[8];
 256 };
 257
 258 struct cf_cmd {
 259         struct i596_cmd cmd;
 260         char i596_config[16];
 261 };
 262
 263 struct i596_rfd {
 264         unsigned short stat;
 265         unsigned short cmd;
 266         struct i596_rfd *b_next;        /* Address from i596 viewpoint */
 267         struct i596_rbd *rbd;
 268         unsigned short count;
 269         unsigned short size;
 270         struct i596_rfd *v_next;        /* Address from CPUs viewpoint */
 271         struct i596_rfd *v_prev;
 272 };
 273
 274 struct i596_rbd {
 275     unsigned short count;
 276     unsigned short zero1;
 277     struct i596_rbd *b_next;
 278     unsigned char *b_data;              /* Address from i596 viewpoint */
 279     unsigned short size;
 280     unsigned short zero2;
 281     struct sk_buff *skb;
 282     struct i596_rbd *v_next;
 283     struct i596_rbd *b_addr;            /* This rbd addr from i596 view */
 284     unsigned char *v_data;              /* Address from CPUs viewpoint */
 285 };
 286
 287 #define TX_RING_SIZE 64
 288 #define RX_RING_SIZE 16
 289
 290 struct i596_scb {
 291         unsigned short status;
 292         unsigned short command;
 293         struct i596_cmd *cmd;
 294         struct i596_rfd *rfd;
 295         unsigned long crc_err;
 296         unsigned long align_err;
 297         unsigned long resource_err;
 298         unsigned long over_err;
 299         unsigned long rcvdt_err;
 300         unsigned long short_err;
 301         unsigned short t_on;
 302         unsigned short t_off;
 303 };
 304
 305 struct i596_iscp {
 306         unsigned long stat;
 307         struct i596_scb *scb;
 308 };
 309
 310 struct i596_scp {
 311         unsigned long sysbus;
 312         unsigned long pad;
 313         struct i596_iscp *iscp;
 314 };
 315
 316 struct i596_private {
 317         volatile struct i596_scp scp;
 318         volatile struct i596_iscp iscp;
 319         volatile struct i596_scb scb;
 320         struct sa_cmd sa_cmd;
 321         struct cf_cmd cf_cmd;
 322         struct tdr_cmd tdr_cmd;
 323         struct mc_cmd mc_cmd;
 324         unsigned long stat;
 325         int last_restart __attribute__((aligned(4)));
 326         struct i596_rfd *rfd_head;
 327         struct i596_rbd *rbd_head;
 328         struct i596_cmd *cmd_tail;
 329         struct i596_cmd *cmd_head;
 330         int cmd_backlog;
 331         unsigned long last_cmd;
 332         struct i596_rfd rfds[RX_RING_SIZE];
 333         struct i596_rbd rbds[RX_RING_SIZE];
 334         struct tx_cmd tx_cmds[TX_RING_SIZE];
 335         struct i596_tbd tbds[TX_RING_SIZE];
 336         int next_tx_cmd;
 337         spinlock_t lock;
 338 };
 339
 340 static char init_setup[] =
 341 {
 342         0x8E,                   /* length, prefetch on */
 343         0xC8,                   /* fifo to 8, monitor off */
 344 #ifdef CONFIG_VME
 345         0xc0,                   /* don't save bad frames */
 346 #else
 347         0x80,                   /* don't save bad frames */
 348 #endif
 349         0x2E,                   /* No source address insertion, 8 byte preamble */
 350         0x00,                   /* priority and backoff defaults */
 351         0x60,                   /* interframe spacing */
 352         0x00,                   /* slot time LSB */
 353         0xf2,                   /* slot time and retries */
 354         0x00,                   /* promiscuous mode */
 355         0x00,                   /* collision detect */
 356         0x40,                   /* minimum frame length */
 357         0xff,
 358         0x00,
 359         0x7f /*  *multi IA */ };
 360
 361 static int i596_open(struct net_device *dev);
 362 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
 363 static irqreturn_t i596_interrupt(int irq, void *dev_id);
 364 static int i596_close(struct net_device *dev);
 365 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
 366 static void i596_tx_timeout (struct net_device *dev);
 367 static void print_eth(unsigned char *buf, char *str);
 368 static void set_multicast_list(struct net_device *dev);
 369
 370 static int rx_ring_size = RX_RING_SIZE;
 371 static int ticks_limit = 25;
 372 static int max_cmd_backlog = TX_RING_SIZE-1;
 373
 374
 375 static inline void CA(struct net_device *dev)
 376 {
 377 #ifdef ENABLE_MVME16x_NET
 378         if (MACH_IS_MVME16x) {
 379                 ((struct i596_reg *) dev->base_addr)->ca = 1;
 380         }
 381 #endif
 382 #ifdef ENABLE_BVME6000_NET
 383         if (MACH_IS_BVME6000) {
 384                 volatile u32 i;
 385
 386                 i = *(volatile u32 *) (dev->base_addr);
 387         }
 388 #endif
 389 }
 390
 391
 392 static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
 393 {
 394 #ifdef ENABLE_MVME16x_NET
 395         if (MACH_IS_MVME16x) {
 396                 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
 397                 p->porthi = ((c) | (u32) (x)) & 0xffff;
 398                 p->portlo = ((c) | (u32) (x)) >> 16;
 399         }
 400 #endif
 401 #ifdef ENABLE_BVME6000_NET
 402         if (MACH_IS_BVME6000) {
 403                 u32 v = (u32) (c) | (u32) (x);
 404                 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
 405                 *(volatile u32 *) dev->base_addr = v;
 406                 udelay(1);
 407                 *(volatile u32 *) dev->base_addr = v;
 408         }
 409 #endif
 410 }
 411
 412
 413 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
 414 {
 415         while (--delcnt && lp->iscp.stat)
 416                 udelay(10);
 417         if (!delcnt) {
 418                 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
 419                      dev->name, str, lp->scb.status, lp->scb.command);
 420                 return -1;
 421         }
 422         else
 423                 return 0;
 424 }
 425
 426
 427 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
 428 {
 429         while (--delcnt && lp->scb.command)
 430                 udelay(10);
 431         if (!delcnt) {
 432                 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
 433                      dev->name, str, lp->scb.status, lp->scb.command);
 434                 return -1;
 435         }
 436         else
 437                 return 0;
 438 }
 439
 440
 441 static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
 442 {
 443         volatile struct i596_cmd *c = cmd;
 444
 445         while (--delcnt && c->command)
 446                 udelay(10);
 447         if (!delcnt) {
 448                 printk(KERN_ERR "%s: %s.\n", dev->name, str);
 449                 return -1;
 450         }
 451         else
 452                 return 0;
 453 }
 454
 455
 456 static void i596_display_data(struct net_device *dev)
 457 {
 458         struct i596_private *lp = dev->ml_priv;
 459         struct i596_cmd *cmd;
 460         struct i596_rfd *rfd;
 461         struct i596_rbd *rbd;
 462
 463         printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
 464                &lp->scp, lp->scp.sysbus, lp->scp.iscp);
 465         printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
 466                &lp->iscp, lp->iscp.stat, lp->iscp.scb);
 467         printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
 468                 " .cmd = %p, .rfd = %p\n",
 469                &lp->scb, lp->scb.status, lp->scb.command,
 470                 lp->scb.cmd, lp->scb.rfd);
 471         printk(KERN_ERR "   errors: crc %lx, align %lx, resource %lx,"
 472                " over %lx, rcvdt %lx, short %lx\n",
 473                 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
 474                 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
 475         cmd = lp->cmd_head;
 476         while (cmd != I596_NULL) {
 477                 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
 478                   cmd, cmd->status, cmd->command, cmd->b_next);
 479                 cmd = cmd->v_next;
 480         }
 481         rfd = lp->rfd_head;
 482         printk(KERN_ERR "rfd_head = %p\n", rfd);
 483         do {
 484                 printk(KERN_ERR "   %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
 485                         " count %04x\n",
 486                         rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
 487                         rfd->count);
 488                 rfd = rfd->v_next;
 489         } while (rfd != lp->rfd_head);
 490         rbd = lp->rbd_head;
 491         printk(KERN_ERR "rbd_head = %p\n", rbd);
 492         do {
 493                 printk(KERN_ERR "   %p .count %04x, b_next %p, b_data %p, size %04x\n",
 494                         rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
 495                 rbd = rbd->v_next;
 496         } while (rbd != lp->rbd_head);
 497 }
 498
 499
 500 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
 501 static irqreturn_t i596_error(int irq, void *dev_id)
 502 {
 503         struct net_device *dev = dev_id;
 504 #ifdef ENABLE_MVME16x_NET
 505         if (MACH_IS_MVME16x) {
 506                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
 507
 508                 pcc2[0x28] = 1;
 509                 pcc2[0x2b] = 0x1d;
 510         }
 511 #endif
 512 #ifdef ENABLE_BVME6000_NET
 513         if (MACH_IS_BVME6000) {
 514                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
 515
 516                 *ethirq = 1;
 517                 *ethirq = 3;
 518         }
 519 #endif
 520         printk(KERN_ERR "%s: Error interrupt\n", dev->name);
 521         i596_display_data(dev);
 522         return IRQ_HANDLED;
 523 }
 524 #endif
 525
 526 static inline void remove_rx_bufs(struct net_device *dev)
 527 {
 528         struct i596_private *lp = dev->ml_priv;
 529         struct i596_rbd *rbd;
 530         int i;
 531
 532         for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
 533                 if (rbd->skb == NULL)
 534                         break;
 535                 dev_kfree_skb(rbd->skb);
 536                 rbd->skb = NULL;
 537         }
 538 }
 539
 540 static inline int init_rx_bufs(struct net_device *dev)
 541 {
 542         struct i596_private *lp = dev->ml_priv;
 543         int i;
 544         struct i596_rfd *rfd;
 545         struct i596_rbd *rbd;
 546
 547         /* First build the Receive Buffer Descriptor List */
 548
 549         for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
 550                 struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ);
 551
 552                 if (skb == NULL) {
 553                         remove_rx_bufs(dev);
 554                         return -ENOMEM;
 555                 }
 556
 557                 rbd->v_next = rbd+1;
 558                 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
 559                 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
 560                 rbd->skb = skb;
 561                 rbd->v_data = skb->data;
 562                 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
 563                 rbd->size = PKT_BUF_SZ;
 564 #ifdef __mc68000__
 565                 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
 566 #endif
 567         }
 568         lp->rbd_head = lp->rbds;
 569         rbd = lp->rbds + rx_ring_size - 1;
 570         rbd->v_next = lp->rbds;
 571         rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
 572
 573         /* Now build the Receive Frame Descriptor List */
 574
 575         for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
 576                 rfd->rbd = I596_NULL;
 577                 rfd->v_next = rfd+1;
 578                 rfd->v_prev = rfd-1;
 579                 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
 580                 rfd->cmd = CMD_FLEX;
 581         }
 582         lp->rfd_head = lp->rfds;
 583         lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
 584         rfd = lp->rfds;
 585         rfd->rbd = lp->rbd_head;
 586         rfd->v_prev = lp->rfds + rx_ring_size - 1;
 587         rfd = lp->rfds + rx_ring_size - 1;
 588         rfd->v_next = lp->rfds;
 589         rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
 590         rfd->cmd = CMD_EOL|CMD_FLEX;
 591
 592         return 0;
 593 }
 594
 595
 596 static void rebuild_rx_bufs(struct net_device *dev)
 597 {
 598         struct i596_private *lp = dev->ml_priv;
 599         int i;
 600
 601         /* Ensure rx frame/buffer descriptors are tidy */
 602
 603         for (i = 0; i < rx_ring_size; i++) {
 604                 lp->rfds[i].rbd = I596_NULL;
 605                 lp->rfds[i].cmd = CMD_FLEX;
 606         }
 607         lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
 608         lp->rfd_head = lp->rfds;
 609         lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
 610         lp->rbd_head = lp->rbds;
 611         lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
 612 }
 613
 614
 615 static int init_i596_mem(struct net_device *dev)
 616 {
 617         struct i596_private *lp = dev->ml_priv;
 618         unsigned long flags;
 619
 620         MPU_PORT(dev, PORT_RESET, NULL);
 621
 622         udelay(100);            /* Wait 100us - seems to help */
 623
 624 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
 625 #ifdef ENABLE_MVME16x_NET
 626         if (MACH_IS_MVME16x) {
 627                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
 628
 629                 /* Disable all ints for now */
 630                 pcc2[0x28] = 1;
 631                 pcc2[0x2a] = 0x48;
 632                 /* Following disables snooping.  Snooping is not required
 633                  * as we make appropriate use of non-cached pages for
 634                  * shared data, and cache_push/cache_clear.
 635                  */
 636                 pcc2[0x2b] = 0x08;
 637         }
 638 #endif
 639 #ifdef ENABLE_BVME6000_NET
 640         if (MACH_IS_BVME6000) {
 641                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
 642
 643                 *ethirq = 1;
 644         }
 645 #endif
 646
 647         /* change the scp address */
 648
 649         MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
 650
 651 #endif
 652
 653         lp->last_cmd = jiffies;
 654
 655 #ifdef ENABLE_MVME16x_NET
 656         if (MACH_IS_MVME16x)
 657                 lp->scp.sysbus = 0x00000054;
 658 #endif
 659 #ifdef ENABLE_BVME6000_NET
 660         if (MACH_IS_BVME6000)
 661                 lp->scp.sysbus = 0x0000004c;
 662 #endif
 663
 664         lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
 665         lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
 666         lp->iscp.stat = ISCP_BUSY;
 667         lp->cmd_backlog = 0;
 668
 669         lp->cmd_head = lp->scb.cmd = I596_NULL;
 670
 671 #ifdef ENABLE_BVME6000_NET
 672         if (MACH_IS_BVME6000) {
 673                 lp->scb.t_on  = 7 * 25;
 674                 lp->scb.t_off = 1 * 25;
 675         }
 676 #endif
 677
 678         DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
 679
 680         CA(dev);
 681
 682         if (wait_istat(dev,lp,1000,"initialization timed out"))
 683                 goto failed;
 684         DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
 685
 686         /* Ensure rx frame/buffer descriptors are tidy */
 687         rebuild_rx_bufs(dev);
 688         lp->scb.command = 0;
 689
 690 #ifdef ENABLE_MVME16x_NET
 691         if (MACH_IS_MVME16x) {
 692                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
 693
 694                 /* Enable ints, etc. now */
 695                 pcc2[0x2a] = 0x55;      /* Edge sensitive */
 696                 pcc2[0x2b] = 0x15;
 697         }
 698 #endif
 699 #ifdef ENABLE_BVME6000_NET
 700         if (MACH_IS_BVME6000) {
 701                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
 702
 703                 *ethirq = 3;
 704         }
 705 #endif
 706
 707
 708         DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
 709         memcpy(lp->cf_cmd.i596_config, init_setup, 14);
 710         lp->cf_cmd.cmd.command = CmdConfigure;
 711         i596_add_cmd(dev, &lp->cf_cmd.cmd);
 712
 713         DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
 714         memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, ETH_ALEN);
 715         lp->sa_cmd.cmd.command = CmdSASetup;
 716         i596_add_cmd(dev, &lp->sa_cmd.cmd);
 717
 718         DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
 719         lp->tdr_cmd.cmd.command = CmdTDR;
 720         i596_add_cmd(dev, &lp->tdr_cmd.cmd);
 721
 722         spin_lock_irqsave (&lp->lock, flags);
 723
 724         if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
 725                 spin_unlock_irqrestore (&lp->lock, flags);
 726                 goto failed;
 727         }
 728         DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
 729         lp->scb.command = RX_START;
 730         CA(dev);
 731
 732         spin_unlock_irqrestore (&lp->lock, flags);
 733
 734         if (wait_cmd(dev,lp,1000,"RX_START not processed"))
 735                 goto failed;
 736         DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
 737         return 0;
 738
 739 failed:
 740         printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
 741         MPU_PORT(dev, PORT_RESET, NULL);
 742         return -1;
 743 }
 744
 745 static inline int i596_rx(struct net_device *dev)
 746 {
 747         struct i596_private *lp = dev->ml_priv;
 748         struct i596_rfd *rfd;
 749         struct i596_rbd *rbd;
 750         int frames = 0;
 751
 752         DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
 753                         lp->rfd_head, lp->rbd_head));
 754
 755         rfd = lp->rfd_head;             /* Ref next frame to check */
 756
 757         while ((rfd->stat) & STAT_C) {  /* Loop while complete frames */
 758                 if (rfd->rbd == I596_NULL)
 759                         rbd = I596_NULL;
 760                 else if (rfd->rbd == lp->rbd_head->b_addr)
 761                         rbd = lp->rbd_head;
 762                 else {
 763                         printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
 764                         /* XXX Now what? */
 765                         rbd = I596_NULL;
 766                 }
 767                 DEB(DEB_RXFRAME, printk(KERN_DEBUG "  rfd %p, rfd.rbd %p, rfd.stat %04x\n",
 768                         rfd, rfd->rbd, rfd->stat));
 769
 770                 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
 771                         /* a good frame */
 772                         int pkt_len = rbd->count & 0x3fff;
 773                         struct sk_buff *skb = rbd->skb;
 774                         int rx_in_place = 0;
 775
 776                         DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
 777                         frames++;
 778
 779                         /* Check if the packet is long enough to just accept
 780                          * without copying to a properly sized skbuff.
 781                          */
 782
 783                         if (pkt_len > rx_copybreak) {
 784                                 struct sk_buff *newskb;
 785
 786                                 /* Get fresh skbuff to replace filled one. */
 787                                 newskb = netdev_alloc_skb(dev, PKT_BUF_SZ);
 788                                 if (newskb == NULL) {
 789                                         skb = NULL;     /* drop pkt */
 790                                         goto memory_squeeze;
 791                                 }
 792                                 /* Pass up the skb already on the Rx ring. */
 793                                 skb_put(skb, pkt_len);
 794                                 rx_in_place = 1;
 795                                 rbd->skb = newskb;
 796                                 rbd->v_data = newskb->data;
 797                                 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
 798 #ifdef __mc68000__
 799                                 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
 800 #endif
 801                         } else {
 802                                 skb = netdev_alloc_skb(dev, pkt_len + 2);
 803                         }
 804 memory_squeeze:
 805                         if (skb == NULL) {
 806                                 /* XXX tulip.c can defer packets here!! */
 807                                 dev->stats.rx_dropped++;
 808                         } else {
 809                                 if (!rx_in_place) {
 810                                         /* 16 byte align the data fields */
 811                                         skb_reserve(skb, 2);
 812                                         skb_put_data(skb, rbd->v_data,
 813                                                      pkt_len);
 814                                 }
 815                                 skb->protocol=eth_type_trans(skb,dev);
 816                                 skb->len = pkt_len;
 817 #ifdef __mc68000__
 818                                 cache_clear(virt_to_phys(rbd->skb->data),
 819                                                 pkt_len);
 820 #endif
 821                                 netif_rx(skb);
 822                                 dev->stats.rx_packets++;
 823                                 dev->stats.rx_bytes+=pkt_len;
 824                         }
 825                 }
 826                 else {
 827                         DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
 828                                         dev->name, rfd->stat));
 829                         dev->stats.rx_errors++;
 830                         if ((rfd->stat) & 0x0001)
 831                                 dev->stats.collisions++;
 832                         if ((rfd->stat) & 0x0080)
 833                                 dev->stats.rx_length_errors++;
 834                         if ((rfd->stat) & 0x0100)
 835                                 dev->stats.rx_over_errors++;
 836                         if ((rfd->stat) & 0x0200)
 837                                 dev->stats.rx_fifo_errors++;
 838                         if ((rfd->stat) & 0x0400)
 839                                 dev->stats.rx_frame_errors++;
 840                         if ((rfd->stat) & 0x0800)
 841                                 dev->stats.rx_crc_errors++;
 842                         if ((rfd->stat) & 0x1000)
 843                                 dev->stats.rx_length_errors++;
 844                 }
 845
 846                 /* Clear the buffer descriptor count and EOF + F flags */
 847
 848                 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
 849                         rbd->count = 0;
 850                         lp->rbd_head = rbd->v_next;
 851                 }
 852
 853                 /* Tidy the frame descriptor, marking it as end of list */
 854
 855                 rfd->rbd = I596_NULL;
 856                 rfd->stat = 0;
 857                 rfd->cmd = CMD_EOL|CMD_FLEX;
 858                 rfd->count = 0;
 859
 860                 /* Remove end-of-list from old end descriptor */
 861
 862                 rfd->v_prev->cmd = CMD_FLEX;
 863
 864                 /* Update record of next frame descriptor to process */
 865
 866                 lp->scb.rfd = rfd->b_next;
 867                 lp->rfd_head = rfd->v_next;
 868                 rfd = lp->rfd_head;
 869         }
 870
 871         DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
 872
 873         return 0;
 874 }
 875
 876
 877 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
 878 {
 879         struct i596_cmd *ptr;
 880
 881         while (lp->cmd_head != I596_NULL) {
 882                 ptr = lp->cmd_head;
 883                 lp->cmd_head = ptr->v_next;
 884                 lp->cmd_backlog--;
 885
 886                 switch ((ptr->command) & 0x7) {
 887                 case CmdTx:
 888                         {
 889                                 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
 890                                 struct sk_buff *skb = tx_cmd->skb;
 891
 892                                 dev_kfree_skb(skb);
 893
 894                                 dev->stats.tx_errors++;
 895                                 dev->stats.tx_aborted_errors++;
 896
 897                                 ptr->v_next = ptr->b_next = I596_NULL;
 898                                 tx_cmd->cmd.command = 0;  /* Mark as free */
 899                                 break;
 900                         }
 901                 default:
 902                         ptr->v_next = ptr->b_next = I596_NULL;
 903                 }
 904         }
 905
 906         wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
 907         lp->scb.cmd = I596_NULL;
 908 }
 909
 910 static void i596_reset(struct net_device *dev, struct i596_private *lp,
 911                         int ioaddr)
 912 {
 913         unsigned long flags;
 914
 915         DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
 916
 917         spin_lock_irqsave (&lp->lock, flags);
 918
 919         wait_cmd(dev,lp,100,"i596_reset timed out");
 920
 921         netif_stop_queue(dev);
 922
 923         lp->scb.command = CUC_ABORT | RX_ABORT;
 924         CA(dev);
 925
 926         /* wait for shutdown */
 927         wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
 928         spin_unlock_irqrestore (&lp->lock, flags);
 929
 930         i596_cleanup_cmd(dev,lp);
 931         i596_rx(dev);
 932
 933         netif_start_queue(dev);
 934         init_i596_mem(dev);
 935 }
 936
 937 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
 938 {
 939         struct i596_private *lp = dev->ml_priv;
 940         int ioaddr = dev->base_addr;
 941         unsigned long flags;
 942
 943         DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
 944
 945         cmd->status = 0;
 946         cmd->command |= (CMD_EOL | CMD_INTR);
 947         cmd->v_next = cmd->b_next = I596_NULL;
 948
 949         spin_lock_irqsave (&lp->lock, flags);
 950
 951         if (lp->cmd_head != I596_NULL) {
 952                 lp->cmd_tail->v_next = cmd;
 953                 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
 954         } else {
 955                 lp->cmd_head = cmd;
 956                 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
 957                 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
 958                 lp->scb.command = CUC_START;
 959                 CA(dev);
 960         }
 961         lp->cmd_tail = cmd;
 962         lp->cmd_backlog++;
 963
 964         spin_unlock_irqrestore (&lp->lock, flags);
 965
 966         if (lp->cmd_backlog > max_cmd_backlog) {
 967                 unsigned long tickssofar = jiffies - lp->last_cmd;
 968
 969                 if (tickssofar < ticks_limit)
 970                         return;
 971
 972                 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
 973
 974                 i596_reset(dev, lp, ioaddr);
 975         }
 976 }
 977
 978 static int i596_open(struct net_device *dev)
 979 {
 980         int res = 0;
 981
 982         DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
 983
 984         if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
 985                 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
 986                 return -EAGAIN;
 987         }
 988 #ifdef ENABLE_MVME16x_NET
 989         if (MACH_IS_MVME16x) {
 990                 if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) {
 991                         res = -EAGAIN;
 992                         goto err_irq_dev;
 993                 }
 994         }
 995 #endif
 996         res = init_rx_bufs(dev);
 997         if (res)
 998                 goto err_irq_56;
 999
1000         netif_start_queue(dev);
1001
1002         if (init_i596_mem(dev)) {
1003                 res = -EAGAIN;
1004                 goto err_queue;
1005         }
1006
1007         return 0;
1008
1009 err_queue:
1010         netif_stop_queue(dev);
1011         remove_rx_bufs(dev);
1012 err_irq_56:
1013 #ifdef ENABLE_MVME16x_NET
1014         free_irq(0x56, dev);
1015 err_irq_dev:
1016 #endif
1017         free_irq(dev->irq, dev);
1018
1019         return res;
1020 }
1021
1022 static void i596_tx_timeout (struct net_device *dev)
1023 {
1024         struct i596_private *lp = dev->ml_priv;
1025         int ioaddr = dev->base_addr;
1026
1027         /* Transmitter timeout, serious problems. */
1028         DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1029                         dev->name));
1030
1031         dev->stats.tx_errors++;
1032
1033         /* Try to restart the adaptor */
1034         if (lp->last_restart == dev->stats.tx_packets) {
1035                 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1036                 /* Shutdown and restart */
1037                 i596_reset (dev, lp, ioaddr);
1038         } else {
1039                 /* Issue a channel attention signal */
1040                 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1041                 lp->scb.command = CUC_START | RX_START;
1042                 CA (dev);
1043                 lp->last_restart = dev->stats.tx_packets;
1044         }
1045
1046         netif_trans_update(dev); /* prevent tx timeout */
1047         netif_wake_queue (dev);
1048 }
1049
1050 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1051 {
1052         struct i596_private *lp = dev->ml_priv;
1053         struct tx_cmd *tx_cmd;
1054         struct i596_tbd *tbd;
1055         short length = skb->len;
1056
1057         DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1058                                 dev->name, skb->len, skb->data));
1059
1060         if (skb->len < ETH_ZLEN) {
1061                 if (skb_padto(skb, ETH_ZLEN))
1062                         return NETDEV_TX_OK;
1063                 length = ETH_ZLEN;
1064         }
1065         netif_stop_queue(dev);
1066
1067         tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1068         tbd = lp->tbds + lp->next_tx_cmd;
1069
1070         if (tx_cmd->cmd.command) {
1071                 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1072                                 dev->name);
1073                 dev->stats.tx_dropped++;
1074
1075                 dev_kfree_skb(skb);
1076         } else {
1077                 if (++lp->next_tx_cmd == TX_RING_SIZE)
1078                         lp->next_tx_cmd = 0;
1079                 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1080                 tbd->next = I596_NULL;
1081
1082                 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1083                 tx_cmd->skb = skb;
1084
1085                 tx_cmd->pad = 0;
1086                 tx_cmd->size = 0;
1087                 tbd->pad = 0;
1088                 tbd->size = EOF | length;
1089
1090                 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1091
1092 #ifdef __mc68000__
1093                 cache_push(virt_to_phys(skb->data), length);
1094 #endif
1095                 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1096                 i596_add_cmd(dev, &tx_cmd->cmd);
1097
1098                 dev->stats.tx_packets++;
1099                 dev->stats.tx_bytes += length;
1100         }
1101
1102         netif_start_queue(dev);
1103
1104         return NETDEV_TX_OK;
1105 }
1106
1107 static void print_eth(unsigned char *add, char *str)
1108 {
1109         printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
1110                add, add + 6, add, add[12], add[13], str);
1111 }
1112
1113 static int io = 0x300;
1114 static int irq = 10;
1115
1116 static const struct net_device_ops i596_netdev_ops = {
1117         .ndo_open               = i596_open,
1118         .ndo_stop               = i596_close,
1119         .ndo_start_xmit         = i596_start_xmit,
1120         .ndo_set_rx_mode        = set_multicast_list,
1121         .ndo_tx_timeout         = i596_tx_timeout,
1122         .ndo_set_mac_address    = eth_mac_addr,
1123         .ndo_validate_addr      = eth_validate_addr,
1124 };
1125
1126 struct net_device * __init i82596_probe(int unit)
1127 {
1128         struct net_device *dev;
1129         int i;
1130         struct i596_private *lp;
1131         char eth_addr[8];
1132         static int probed;
1133         int err;
1134
1135         if (probed)
1136                 return ERR_PTR(-ENODEV);
1137         probed++;
1138
1139         dev = alloc_etherdev(0);
1140         if (!dev)
1141                 return ERR_PTR(-ENOMEM);
1142
1143         if (unit >= 0) {
1144                 sprintf(dev->name, "eth%d", unit);
1145                 netdev_boot_setup_check(dev);
1146         } else {
1147                 dev->base_addr = io;
1148                 dev->irq = irq;
1149         }
1150
1151 #ifdef ENABLE_MVME16x_NET
1152         if (MACH_IS_MVME16x) {
1153                 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1154                         printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1155                         err = -ENODEV;
1156                         goto out;
1157                 }
1158                 memcpy(eth_addr, (void *) 0xfffc1f2c, ETH_ALEN);        /* YUCK! Get addr from NOVRAM */
1159                 dev->base_addr = MVME_I596_BASE;
1160                 dev->irq = (unsigned) MVME16x_IRQ_I596;
1161                 goto found;
1162         }
1163 #endif
1164 #ifdef ENABLE_BVME6000_NET
1165         if (MACH_IS_BVME6000) {
1166                 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1167                 unsigned char msr = rtc[3];
1168                 int i;
1169
1170                 rtc[3] |= 0x80;
1171                 for (i = 0; i < 6; i++)
1172                         eth_addr[i] = rtc[i * 4 + 7];   /* Stored in RTC RAM at offset 1 */
1173                 rtc[3] = msr;
1174                 dev->base_addr = BVME_I596_BASE;
1175                 dev->irq = (unsigned) BVME_IRQ_I596;
1176                 goto found;
1177         }
1178 #endif
1179         err = -ENODEV;
1180         goto out;
1181
1182 found:
1183         dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1184         if (!dev->mem_start) {
1185                 err = -ENOMEM;
1186                 goto out1;
1187         }
1188
1189         DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1190
1191         for (i = 0; i < 6; i++)
1192                 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1193
1194         DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1195
1196         DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1197
1198         /* The 82596-specific entries in the device structure. */
1199         dev->netdev_ops = &i596_netdev_ops;
1200         dev->watchdog_timeo = TX_TIMEOUT;
1201
1202         dev->ml_priv = (void *)(dev->mem_start);
1203
1204         lp = dev->ml_priv;
1205         DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1206                         "lp->scb at 0x%08lx\n",
1207                         dev->name, (unsigned long)lp,
1208                         sizeof(struct i596_private), (unsigned long)&lp->scb));
1209         memset((void *) lp, 0, sizeof(struct i596_private));
1210
1211 #ifdef __mc68000__
1212         cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1213         cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1214         kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1215 #endif
1216         lp->scb.command = 0;
1217         lp->scb.cmd = I596_NULL;
1218         lp->scb.rfd = I596_NULL;
1219         spin_lock_init(&lp->lock);
1220
1221         err = register_netdev(dev);
1222         if (err)
1223                 goto out2;
1224         return dev;
1225 out2:
1226 #ifdef __mc68000__
1227         /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1228          * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1229          */
1230         kernel_set_cachemode((void *)(dev->mem_start), 4096,
1231                         IOMAP_FULL_CACHING);
1232 #endif
1233         free_page ((u32)(dev->mem_start));
1234 out1:
1235 out:
1236         free_netdev(dev);
1237         return ERR_PTR(err);
1238 }
1239
1240 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1241 {
1242         struct net_device *dev = dev_id;
1243         struct i596_private *lp;
1244         short ioaddr;
1245         unsigned short status, ack_cmd = 0;
1246         int handled = 0;
1247
1248 #ifdef ENABLE_BVME6000_NET
1249         if (MACH_IS_BVME6000) {
1250                 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1251                         i596_error(irq, dev_id);
1252                         return IRQ_HANDLED;
1253                 }
1254         }
1255 #endif
1256         if (dev == NULL) {
1257                 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1258                 return IRQ_NONE;
1259         }
1260
1261         ioaddr = dev->base_addr;
1262         lp = dev->ml_priv;
1263
1264         spin_lock (&lp->lock);
1265
1266         wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1267         status = lp->scb.status;
1268
1269         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1270                         dev->name, irq, status));
1271
1272         ack_cmd = status & 0xf000;
1273
1274         if ((status & 0x8000) || (status & 0x2000)) {
1275                 struct i596_cmd *ptr;
1276
1277                 handled = 1;
1278                 if ((status & 0x8000))
1279                         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1280                 if ((status & 0x2000))
1281                         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1282
1283                 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1284                         ptr = lp->cmd_head;
1285
1286                         DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1287                                        lp->cmd_head->status, lp->cmd_head->command));
1288                         lp->cmd_head = ptr->v_next;
1289                         lp->cmd_backlog--;
1290
1291                         switch ((ptr->command) & 0x7) {
1292                         case CmdTx:
1293                             {
1294                                 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1295                                 struct sk_buff *skb = tx_cmd->skb;
1296
1297                                 if ((ptr->status) & STAT_OK) {
1298                                         DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1299                                 } else {
1300                                         dev->stats.tx_errors++;
1301                                         if ((ptr->status) & 0x0020)
1302                                                 dev->stats.collisions++;
1303                                         if (!((ptr->status) & 0x0040))
1304                                                 dev->stats.tx_heartbeat_errors++;
1305                                         if ((ptr->status) & 0x0400)
1306                                                 dev->stats.tx_carrier_errors++;
1307                                         if ((ptr->status) & 0x0800)
1308                                                 dev->stats.collisions++;
1309                                         if ((ptr->status) & 0x1000)
1310                                                 dev->stats.tx_aborted_errors++;
1311                                 }
1312
1313                                 dev_consume_skb_irq(skb);
1314
1315                                 tx_cmd->cmd.command = 0; /* Mark free */
1316                                 break;
1317                             }
1318                         case CmdTDR:
1319                             {
1320                                 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1321
1322                                 if (status & 0x8000) {
1323                                         DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1324                                 } else {
1325                                         if (status & 0x4000)
1326                                                 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1327                                         if (status & 0x2000)
1328                                                 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1329                                         if (status & 0x1000)
1330                                                 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1331
1332                                         DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1333                                 }
1334                                 break;
1335                             }
1336                         case CmdConfigure:
1337                         case CmdMulticastList:
1338                                 /* Zap command so set_multicast_list() knows it is free */
1339                                 ptr->command = 0;
1340                                 break;
1341                         }
1342                         ptr->v_next = ptr->b_next = I596_NULL;
1343                         lp->last_cmd = jiffies;
1344                 }
1345
1346                 ptr = lp->cmd_head;
1347                 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1348                         ptr->command &= 0x1fff;
1349                         ptr = ptr->v_next;
1350                 }
1351
1352                 if ((lp->cmd_head != I596_NULL))
1353                         ack_cmd |= CUC_START;
1354                 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1355         }
1356         if ((status & 0x1000) || (status & 0x4000)) {
1357                 if ((status & 0x4000))
1358                         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1359                 i596_rx(dev);
1360                 /* Only RX_START if stopped - RGH 07-07-96 */
1361                 if (status & 0x1000) {
1362                         if (netif_running(dev)) {
1363                                 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1364                                 ack_cmd |= RX_START;
1365                                 dev->stats.rx_errors++;
1366                                 dev->stats.rx_fifo_errors++;
1367                                 rebuild_rx_bufs(dev);
1368                         }
1369                 }
1370         }
1371         wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1372         lp->scb.command = ack_cmd;
1373
1374 #ifdef ENABLE_MVME16x_NET
1375         if (MACH_IS_MVME16x) {
1376                 /* Ack the interrupt */
1377
1378                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1379
1380                 pcc2[0x2a] |= 0x08;
1381         }
1382 #endif
1383 #ifdef ENABLE_BVME6000_NET
1384         if (MACH_IS_BVME6000) {
1385                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1386
1387                 *ethirq = 1;
1388                 *ethirq = 3;
1389         }
1390 #endif
1391         CA(dev);
1392
1393         DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1394
1395         spin_unlock (&lp->lock);
1396         return IRQ_RETVAL(handled);
1397 }
1398
1399 static int i596_close(struct net_device *dev)
1400 {
1401         struct i596_private *lp = dev->ml_priv;
1402         unsigned long flags;
1403
1404         netif_stop_queue(dev);
1405
1406         DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1407                        dev->name, lp->scb.status));
1408
1409         spin_lock_irqsave(&lp->lock, flags);
1410
1411         wait_cmd(dev,lp,100,"close1 timed out");
1412         lp->scb.command = CUC_ABORT | RX_ABORT;
1413         CA(dev);
1414
1415         wait_cmd(dev,lp,100,"close2 timed out");
1416
1417         spin_unlock_irqrestore(&lp->lock, flags);
1418         DEB(DEB_STRUCT,i596_display_data(dev));
1419         i596_cleanup_cmd(dev,lp);
1420
1421 #ifdef ENABLE_MVME16x_NET
1422         if (MACH_IS_MVME16x) {
1423                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1424
1425                 /* Disable all ints */
1426                 pcc2[0x28] = 1;
1427                 pcc2[0x2a] = 0x40;
1428                 pcc2[0x2b] = 0x40;      /* Set snooping bits now! */
1429         }
1430 #endif
1431 #ifdef ENABLE_BVME6000_NET
1432         if (MACH_IS_BVME6000) {
1433                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1434
1435                 *ethirq = 1;
1436         }
1437 #endif
1438
1439 #ifdef ENABLE_MVME16x_NET
1440         free_irq(0x56, dev);
1441 #endif
1442         free_irq(dev->irq, dev);
1443         remove_rx_bufs(dev);
1444
1445         return 0;
1446 }
1447
1448 /*
1449  *    Set or clear the multicast filter for this adaptor.
1450  */
1451
1452 static void set_multicast_list(struct net_device *dev)
1453 {
1454         struct i596_private *lp = dev->ml_priv;
1455         int config = 0, cnt;
1456
1457         DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1458                 dev->name, netdev_mc_count(dev),
1459                 dev->flags & IFF_PROMISC  ? "ON" : "OFF",
1460                 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1461
1462         if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1463                 return;
1464
1465         if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1466                 lp->cf_cmd.i596_config[8] |= 0x01;
1467                 config = 1;
1468         }
1469         if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1470                 lp->cf_cmd.i596_config[8] &= ~0x01;
1471                 config = 1;
1472         }
1473         if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1474                 lp->cf_cmd.i596_config[11] &= ~0x20;
1475                 config = 1;
1476         }
1477         if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1478                 lp->cf_cmd.i596_config[11] |= 0x20;
1479                 config = 1;
1480         }
1481         if (config) {
1482                 lp->cf_cmd.cmd.command = CmdConfigure;
1483                 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1484         }
1485
1486         cnt = netdev_mc_count(dev);
1487         if (cnt > MAX_MC_CNT)
1488         {
1489                 cnt = MAX_MC_CNT;
1490                 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1491                         dev->name, cnt);
1492         }
1493
1494         if (!netdev_mc_empty(dev)) {
1495                 struct netdev_hw_addr *ha;
1496                 unsigned char *cp;
1497                 struct mc_cmd *cmd;
1498
1499                 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1500                         return;
1501                 cmd = &lp->mc_cmd;
1502                 cmd->cmd.command = CmdMulticastList;
1503                 cmd->mc_cnt = cnt * ETH_ALEN;
1504                 cp = cmd->mc_addrs;
1505                 netdev_for_each_mc_addr(ha, dev) {
1506                         if (!cnt--)
1507                                 break;
1508                         memcpy(cp, ha->addr, ETH_ALEN);
1509                         if (i596_debug > 1)
1510                                 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
1511                                                 dev->name, cp));
1512                         cp += ETH_ALEN;
1513                 }
1514                 i596_add_cmd(dev, &cmd->cmd);
1515         }
1516 }
1517
1518 #ifdef MODULE
1519 static struct net_device *dev_82596;
1520
1521 static int debug = -1;
1522 module_param(debug, int, 0);
1523 MODULE_PARM_DESC(debug, "i82596 debug mask");
1524
1525 int __init init_module(void)
1526 {
1527         if (debug >= 0)
1528                 i596_debug = debug;
1529         dev_82596 = i82596_probe(-1);
1530         return PTR_ERR_OR_ZERO(dev_82596);
1531 }
1532
1533 void __exit cleanup_module(void)
1534 {
1535         unregister_netdev(dev_82596);
1536 #ifdef __mc68000__
1537         /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1538          * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1539          */
1540
1541         kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1542                         IOMAP_FULL_CACHING);
1543 #endif
1544         free_page ((u32)(dev_82596->mem_start));
1545         free_netdev(dev_82596);
1546 }
1547
1548 #endif                          /* MODULE */