drivers/net/ethernet/i825xx/82596.c

   1 // SPDX-License-Identifier: GPL-1.0+
   2 /* 82596.c: A generic 82596 ethernet driver for linux. */
   3 /*
   4    Based on Apricot.c
   5    Written 1994 by Mark Evans.
   6    This driver is for the Apricot 82596 bus-master interface
   7
   8    Modularised 12/94 Mark Evans
   9
  10
  11    Modified to support the 82596 ethernet chips on 680x0 VME boards.
  12    by Richard Hirst <richard@sleepie.demon.co.uk>
  13    Renamed to be 82596.c
  14
  15    980825:  Changed to receive directly in to sk_buffs which are
  16    allocated at open() time.  Eliminates copy on incoming frames
  17    (small ones are still copied).  Shared data now held in a
  18    non-cached page, so we can run on 68060 in copyback mode.
  19
  20    TBD:
  21    * look at deferring rx frames rather than discarding (as per tulip)
  22    * handle tx ring full as per tulip
  23    * performance test to tune rx_copybreak
  24
  25    Most of my modifications relate to the braindead big-endian
  26    implementation by Intel.  When the i596 is operating in
  27    'big-endian' mode, it thinks a 32 bit value of 0x12345678
  28    should be stored as 0x56781234.  This is a real pain, when
  29    you have linked lists which are shared by the 680x0 and the
  30    i596.
  31
  32    Driver skeleton
  33    Written 1993 by Donald Becker.
  34    Copyright 1993 United States Government as represented by the Director,
  35    National Security Agency.
  36
  37    The author may be reached as becker@scyld.com, or C/O
  38    Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
  39
  40  */
  41
  42 #include <linux/module.h>
  43 #include <linux/kernel.h>
  44 #include <linux/string.h>
  45 #include <linux/errno.h>
  46 #include <linux/ioport.h>
  47 #include <linux/interrupt.h>
  48 #include <linux/delay.h>
  49 #include <linux/netdevice.h>
  50 #include <linux/etherdevice.h>
  51 #include <linux/skbuff.h>
  52 #include <linux/init.h>
  53 #include <linux/bitops.h>
  54 #include <linux/gfp.h>
  55 #include <linux/pgtable.h>
  56
  57 #include <asm/io.h>
  58 #include <asm/dma.h>
  59 #include <asm/cacheflush.h>
  60
  61 static char version[] __initdata =
  62         "82596.c $Revision: 1.5 $\n";
  63
  64 #define DRV_NAME        "82596"
  65
  66 /* DEBUG flags
  67  */
  68
  69 #define DEB_INIT        0x0001
  70 #define DEB_PROBE       0x0002
  71 #define DEB_SERIOUS     0x0004
  72 #define DEB_ERRORS      0x0008
  73 #define DEB_MULTI       0x0010
  74 #define DEB_TDR         0x0020
  75 #define DEB_OPEN        0x0040
  76 #define DEB_RESET       0x0080
  77 #define DEB_ADDCMD      0x0100
  78 #define DEB_STATUS      0x0200
  79 #define DEB_STARTTX     0x0400
  80 #define DEB_RXADDR      0x0800
  81 #define DEB_TXADDR      0x1000
  82 #define DEB_RXFRAME     0x2000
  83 #define DEB_INTS        0x4000
  84 #define DEB_STRUCT      0x8000
  85 #define DEB_ANY         0xffff
  86
  87
  88 #define DEB(x,y)        if (i596_debug & (x)) y
  89
  90
  91 #if IS_ENABLED(CONFIG_MVME16x_NET)
  92 #define ENABLE_MVME16x_NET
  93 #endif
  94 #if IS_ENABLED(CONFIG_BVME6000_NET)
  95 #define ENABLE_BVME6000_NET
  96 #endif
  97
  98 #ifdef ENABLE_MVME16x_NET
  99 #include <asm/mvme16xhw.h>
 100 #endif
 101 #ifdef ENABLE_BVME6000_NET
 102 #include <asm/bvme6000hw.h>
 103 #endif
 104
 105 /*
 106  * Define various macros for Channel Attention, word swapping etc., dependent
 107  * on architecture.  MVME and BVME are 680x0 based, otherwise it is Intel.
 108  */
 109
 110 #ifdef __mc68000__
 111 #define WSWAPrfd(x)  ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 112 #define WSWAPrbd(x)  ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 113 #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
 114 #define WSWAPscb(x)  ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 115 #define WSWAPcmd(x)  ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 116 #define WSWAPtbd(x)  ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 117 #define WSWAPchar(x) ((char *)            (((u32)(x)<<16) | ((((u32)(x)))>>16)))
 118 #define ISCP_BUSY       0x00010000
 119 #else
 120 #error 82596.c: unknown architecture
 121 #endif
 122
 123 /*
 124  * These were the intel versions, left here for reference. There
 125  * are currently no x86 users of this legacy i82596 chip.
 126  */
 127 #if 0
 128 #define WSWAPrfd(x)     ((struct i596_rfd *)((long)x))
 129 #define WSWAPrbd(x)     ((struct i596_rbd *)((long)x))
 130 #define WSWAPiscp(x)    ((struct i596_iscp *)((long)x))
 131 #define WSWAPscb(x)     ((struct i596_scb *)((long)x))
 132 #define WSWAPcmd(x)     ((struct i596_cmd *)((long)x))
 133 #define WSWAPtbd(x)     ((struct i596_tbd *)((long)x))
 134 #define WSWAPchar(x)    ((char *)((long)x))
 135 #define ISCP_BUSY       0x0001
 136 #endif
 137
 138 /*
 139  * The MPU_PORT command allows direct access to the 82596. With PORT access
 140  * the following commands are available (p5-18). The 32-bit port command
 141  * must be word-swapped with the most significant word written first.
 142  * This only applies to VME boards.
 143  */
 144 #define PORT_RESET              0x00    /* reset 82596 */
 145 #define PORT_SELFTEST           0x01    /* selftest */
 146 #define PORT_ALTSCP             0x02    /* alternate SCB address */
 147 #define PORT_ALTDUMP            0x03    /* Alternate DUMP address */
 148
 149 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
 150
 151 MODULE_AUTHOR("Richard Hirst");
 152 MODULE_DESCRIPTION("i82596 driver");
 153 MODULE_LICENSE("GPL");
 154
 155 module_param(i596_debug, int, 0);
 156 MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
 157
 158
 159 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
 160  * a full sized sk_buff.  Value of 100 stolen from tulip.c (!alpha).
 161  */
 162 static int rx_copybreak = 100;
 163
 164 #define PKT_BUF_SZ      1536
 165 #define MAX_MC_CNT      64
 166
 167 #define I596_TOTAL_SIZE 17
 168
 169 #define I596_NULL ((void *)0xffffffff)
 170
 171 #define CMD_EOL         0x8000  /* The last command of the list, stop. */
 172 #define CMD_SUSP        0x4000  /* Suspend after doing cmd. */
 173 #define CMD_INTR        0x2000  /* Interrupt after doing cmd. */
 174
 175 #define CMD_FLEX        0x0008  /* Enable flexible memory model */
 176
 177 enum commands {
 178         CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
 179         CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
 180 };
 181
 182 #define STAT_C          0x8000  /* Set to 0 after execution */
 183 #define STAT_B          0x4000  /* Command being executed */
 184 #define STAT_OK         0x2000  /* Command executed ok */
 185 #define STAT_A          0x1000  /* Command aborted */
 186
 187 #define  CUC_START      0x0100
 188 #define  CUC_RESUME     0x0200
 189 #define  CUC_SUSPEND    0x0300
 190 #define  CUC_ABORT      0x0400
 191 #define  RX_START       0x0010
 192 #define  RX_RESUME      0x0020
 193 #define  RX_SUSPEND     0x0030
 194 #define  RX_ABORT       0x0040
 195
 196 #define TX_TIMEOUT      (HZ/20)
 197
 198
 199 struct i596_reg {
 200         unsigned short porthi;
 201         unsigned short portlo;
 202         unsigned long ca;
 203 };
 204
 205 #define EOF             0x8000
 206 #define SIZE_MASK       0x3fff
 207
 208 struct i596_tbd {
 209         unsigned short size;
 210         unsigned short pad;
 211         struct i596_tbd *next;
 212         char *data;
 213 };
 214
 215 /* The command structure has two 'next' pointers; v_next is the address of
 216  * the next command as seen by the CPU, b_next is the address of the next
 217  * command as seen by the 82596.  The b_next pointer, as used by the 82596
 218  * always references the status field of the next command, rather than the
 219  * v_next field, because the 82596 is unaware of v_next.  It may seem more
 220  * logical to put v_next at the end of the structure, but we cannot do that
 221  * because the 82596 expects other fields to be there, depending on command
 222  * type.
 223  */
 224
 225 struct i596_cmd {
 226         struct i596_cmd *v_next;        /* Address from CPUs viewpoint */
 227         unsigned short status;
 228         unsigned short command;
 229         struct i596_cmd *b_next;        /* Address from i596 viewpoint */
 230 };
 231
 232 struct tx_cmd {
 233         struct i596_cmd cmd;
 234         struct i596_tbd *tbd;
 235         unsigned short size;
 236         unsigned short pad;
 237         struct sk_buff *skb;    /* So we can free it after tx */
 238 };
 239
 240 struct tdr_cmd {
 241         struct i596_cmd cmd;
 242         unsigned short status;
 243         unsigned short pad;
 244 };
 245
 246 struct mc_cmd {
 247         struct i596_cmd cmd;
 248         short mc_cnt;
 249         char mc_addrs[MAX_MC_CNT*6];
 250 };
 251
 252 struct sa_cmd {
 253         struct i596_cmd cmd;
 254         char eth_addr[8];
 255 };
 256
 257 struct cf_cmd {
 258         struct i596_cmd cmd;
 259         char i596_config[16];
 260 };
 261
 262 struct i596_rfd {
 263         unsigned short stat;
 264         unsigned short cmd;
 265         struct i596_rfd *b_next;        /* Address from i596 viewpoint */
 266         struct i596_rbd *rbd;
 267         unsigned short count;
 268         unsigned short size;
 269         struct i596_rfd *v_next;        /* Address from CPUs viewpoint */
 270         struct i596_rfd *v_prev;
 271 };
 272
 273 struct i596_rbd {
 274     unsigned short count;
 275     unsigned short zero1;
 276     struct i596_rbd *b_next;
 277     unsigned char *b_data;              /* Address from i596 viewpoint */
 278     unsigned short size;
 279     unsigned short zero2;
 280     struct sk_buff *skb;
 281     struct i596_rbd *v_next;
 282     struct i596_rbd *b_addr;            /* This rbd addr from i596 view */
 283     unsigned char *v_data;              /* Address from CPUs viewpoint */
 284 };
 285
 286 #define TX_RING_SIZE 64
 287 #define RX_RING_SIZE 16
 288
 289 struct i596_scb {
 290         unsigned short status;
 291         unsigned short command;
 292         struct i596_cmd *cmd;
 293         struct i596_rfd *rfd;
 294         unsigned long crc_err;
 295         unsigned long align_err;
 296         unsigned long resource_err;
 297         unsigned long over_err;
 298         unsigned long rcvdt_err;
 299         unsigned long short_err;
 300         unsigned short t_on;
 301         unsigned short t_off;
 302 };
 303
 304 struct i596_iscp {
 305         unsigned long stat;
 306         struct i596_scb *scb;
 307 };
 308
 309 struct i596_scp {
 310         unsigned long sysbus;
 311         unsigned long pad;
 312         struct i596_iscp *iscp;
 313 };
 314
 315 struct i596_private {
 316         volatile struct i596_scp scp;
 317         volatile struct i596_iscp iscp;
 318         volatile struct i596_scb scb;
 319         struct sa_cmd sa_cmd;
 320         struct cf_cmd cf_cmd;
 321         struct tdr_cmd tdr_cmd;
 322         struct mc_cmd mc_cmd;
 323         unsigned long stat;
 324         int last_restart __attribute__((aligned(4)));
 325         struct i596_rfd *rfd_head;
 326         struct i596_rbd *rbd_head;
 327         struct i596_cmd *cmd_tail;
 328         struct i596_cmd *cmd_head;
 329         int cmd_backlog;
 330         unsigned long last_cmd;
 331         struct i596_rfd rfds[RX_RING_SIZE];
 332         struct i596_rbd rbds[RX_RING_SIZE];
 333         struct tx_cmd tx_cmds[TX_RING_SIZE];
 334         struct i596_tbd tbds[TX_RING_SIZE];
 335         int next_tx_cmd;
 336         spinlock_t lock;
 337 };
 338
 339 static char init_setup[] =
 340 {
 341         0x8E,                   /* length, prefetch on */
 342         0xC8,                   /* fifo to 8, monitor off */
 343 #ifdef CONFIG_VME
 344         0xc0,                   /* don't save bad frames */
 345 #else
 346         0x80,                   /* don't save bad frames */
 347 #endif
 348         0x2E,                   /* No source address insertion, 8 byte preamble */
 349         0x00,                   /* priority and backoff defaults */
 350         0x60,                   /* interframe spacing */
 351         0x00,                   /* slot time LSB */
 352         0xf2,                   /* slot time and retries */
 353         0x00,                   /* promiscuous mode */
 354         0x00,                   /* collision detect */
 355         0x40,                   /* minimum frame length */
 356         0xff,
 357         0x00,
 358         0x7f /*  *multi IA */ };
 359
 360 static int i596_open(struct net_device *dev);
 361 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
 362 static irqreturn_t i596_interrupt(int irq, void *dev_id);
 363 static int i596_close(struct net_device *dev);
 364 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
 365 static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue);
 366 static void print_eth(unsigned char *buf, char *str);
 367 static void set_multicast_list(struct net_device *dev);
 368
 369 static int rx_ring_size = RX_RING_SIZE;
 370 static int ticks_limit = 25;
 371 static int max_cmd_backlog = TX_RING_SIZE-1;
 372
 373
 374 static inline void CA(struct net_device *dev)
 375 {
 376 #ifdef ENABLE_MVME16x_NET
 377         if (MACH_IS_MVME16x) {
 378                 ((struct i596_reg *) dev->base_addr)->ca = 1;
 379         }
 380 #endif
 381 #ifdef ENABLE_BVME6000_NET
 382         if (MACH_IS_BVME6000) {
 383                 volatile u32 i;
 384
 385                 i = *(volatile u32 *) (dev->base_addr);
 386         }
 387 #endif
 388 }
 389
 390
 391 static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
 392 {
 393 #ifdef ENABLE_MVME16x_NET
 394         if (MACH_IS_MVME16x) {
 395                 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
 396                 p->porthi = ((c) | (u32) (x)) & 0xffff;
 397                 p->portlo = ((c) | (u32) (x)) >> 16;
 398         }
 399 #endif
 400 #ifdef ENABLE_BVME6000_NET
 401         if (MACH_IS_BVME6000) {
 402                 u32 v = (u32) (c) | (u32) (x);
 403                 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
 404                 *(volatile u32 *) dev->base_addr = v;
 405                 udelay(1);
 406                 *(volatile u32 *) dev->base_addr = v;
 407         }
 408 #endif
 409 }
 410
 411
 412 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
 413 {
 414         while (--delcnt && lp->iscp.stat)
 415                 udelay(10);
 416         if (!delcnt) {
 417                 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
 418                      dev->name, str, lp->scb.status, lp->scb.command);
 419                 return -1;
 420         }
 421         else
 422                 return 0;
 423 }
 424
 425
 426 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
 427 {
 428         while (--delcnt && lp->scb.command)
 429                 udelay(10);
 430         if (!delcnt) {
 431                 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
 432                      dev->name, str, lp->scb.status, lp->scb.command);
 433                 return -1;
 434         }
 435         else
 436                 return 0;
 437 }
 438
 439
 440 static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
 441 {
 442         volatile struct i596_cmd *c = cmd;
 443
 444         while (--delcnt && c->command)
 445                 udelay(10);
 446         if (!delcnt) {
 447                 printk(KERN_ERR "%s: %s.\n", dev->name, str);
 448                 return -1;
 449         }
 450         else
 451                 return 0;
 452 }
 453
 454
 455 static void i596_display_data(struct net_device *dev)
 456 {
 457         struct i596_private *lp = dev->ml_priv;
 458         struct i596_cmd *cmd;
 459         struct i596_rfd *rfd;
 460         struct i596_rbd *rbd;
 461
 462         printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
 463                &lp->scp, lp->scp.sysbus, lp->scp.iscp);
 464         printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
 465                &lp->iscp, lp->iscp.stat, lp->iscp.scb);
 466         printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
 467                 " .cmd = %p, .rfd = %p\n",
 468                &lp->scb, lp->scb.status, lp->scb.command,
 469                 lp->scb.cmd, lp->scb.rfd);
 470         printk(KERN_ERR "   errors: crc %lx, align %lx, resource %lx,"
 471                " over %lx, rcvdt %lx, short %lx\n",
 472                 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
 473                 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
 474         cmd = lp->cmd_head;
 475         while (cmd != I596_NULL) {
 476                 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
 477                   cmd, cmd->status, cmd->command, cmd->b_next);
 478                 cmd = cmd->v_next;
 479         }
 480         rfd = lp->rfd_head;
 481         printk(KERN_ERR "rfd_head = %p\n", rfd);
 482         do {
 483                 printk(KERN_ERR "   %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
 484                         " count %04x\n",
 485                         rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
 486                         rfd->count);
 487                 rfd = rfd->v_next;
 488         } while (rfd != lp->rfd_head);
 489         rbd = lp->rbd_head;
 490         printk(KERN_ERR "rbd_head = %p\n", rbd);
 491         do {
 492                 printk(KERN_ERR "   %p .count %04x, b_next %p, b_data %p, size %04x\n",
 493                         rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
 494                 rbd = rbd->v_next;
 495         } while (rbd != lp->rbd_head);
 496 }
 497
 498
 499 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
 500 static irqreturn_t i596_error(int irq, void *dev_id)
 501 {
 502         struct net_device *dev = dev_id;
 503 #ifdef ENABLE_MVME16x_NET
 504         if (MACH_IS_MVME16x) {
 505                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
 506
 507                 pcc2[0x28] = 1;
 508                 pcc2[0x2b] = 0x1d;
 509         }
 510 #endif
 511 #ifdef ENABLE_BVME6000_NET
 512         if (MACH_IS_BVME6000) {
 513                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
 514
 515                 *ethirq = 1;
 516                 *ethirq = 3;
 517         }
 518 #endif
 519         printk(KERN_ERR "%s: Error interrupt\n", dev->name);
 520         i596_display_data(dev);
 521         return IRQ_HANDLED;
 522 }
 523 #endif
 524
 525 static inline void remove_rx_bufs(struct net_device *dev)
 526 {
 527         struct i596_private *lp = dev->ml_priv;
 528         struct i596_rbd *rbd;
 529         int i;
 530
 531         for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
 532                 if (rbd->skb == NULL)
 533                         break;
 534                 dev_kfree_skb(rbd->skb);
 535                 rbd->skb = NULL;
 536         }
 537 }
 538
 539 static inline int init_rx_bufs(struct net_device *dev)
 540 {
 541         struct i596_private *lp = dev->ml_priv;
 542         int i;
 543         struct i596_rfd *rfd;
 544         struct i596_rbd *rbd;
 545
 546         /* First build the Receive Buffer Descriptor List */
 547
 548         for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
 549                 struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ);
 550
 551                 if (skb == NULL) {
 552                         remove_rx_bufs(dev);
 553                         return -ENOMEM;
 554                 }
 555
 556                 rbd->v_next = rbd+1;
 557                 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
 558                 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
 559                 rbd->skb = skb;
 560                 rbd->v_data = skb->data;
 561                 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
 562                 rbd->size = PKT_BUF_SZ;
 563 #ifdef __mc68000__
 564                 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
 565 #endif
 566         }
 567         lp->rbd_head = lp->rbds;
 568         rbd = lp->rbds + rx_ring_size - 1;
 569         rbd->v_next = lp->rbds;
 570         rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
 571
 572         /* Now build the Receive Frame Descriptor List */
 573
 574         for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
 575                 rfd->rbd = I596_NULL;
 576                 rfd->v_next = rfd+1;
 577                 rfd->v_prev = rfd-1;
 578                 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
 579                 rfd->cmd = CMD_FLEX;
 580         }
 581         lp->rfd_head = lp->rfds;
 582         lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
 583         rfd = lp->rfds;
 584         rfd->rbd = lp->rbd_head;
 585         rfd->v_prev = lp->rfds + rx_ring_size - 1;
 586         rfd = lp->rfds + rx_ring_size - 1;
 587         rfd->v_next = lp->rfds;
 588         rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
 589         rfd->cmd = CMD_EOL|CMD_FLEX;
 590
 591         return 0;
 592 }
 593
 594
 595 static void rebuild_rx_bufs(struct net_device *dev)
 596 {
 597         struct i596_private *lp = dev->ml_priv;
 598         int i;
 599
 600         /* Ensure rx frame/buffer descriptors are tidy */
 601
 602         for (i = 0; i < rx_ring_size; i++) {
 603                 lp->rfds[i].rbd = I596_NULL;
 604                 lp->rfds[i].cmd = CMD_FLEX;
 605         }
 606         lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
 607         lp->rfd_head = lp->rfds;
 608         lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
 609         lp->rbd_head = lp->rbds;
 610         lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
 611 }
 612
 613
 614 static int init_i596_mem(struct net_device *dev)
 615 {
 616         struct i596_private *lp = dev->ml_priv;
 617         unsigned long flags;
 618
 619         MPU_PORT(dev, PORT_RESET, NULL);
 620
 621         udelay(100);            /* Wait 100us - seems to help */
 622
 623 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
 624 #ifdef ENABLE_MVME16x_NET
 625         if (MACH_IS_MVME16x) {
 626                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
 627
 628                 /* Disable all ints for now */
 629                 pcc2[0x28] = 1;
 630                 pcc2[0x2a] = 0x48;
 631                 /* Following disables snooping.  Snooping is not required
 632                  * as we make appropriate use of non-cached pages for
 633                  * shared data, and cache_push/cache_clear.
 634                  */
 635                 pcc2[0x2b] = 0x08;
 636         }
 637 #endif
 638 #ifdef ENABLE_BVME6000_NET
 639         if (MACH_IS_BVME6000) {
 640                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
 641
 642                 *ethirq = 1;
 643         }
 644 #endif
 645
 646         /* change the scp address */
 647
 648         MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
 649
 650 #endif
 651
 652         lp->last_cmd = jiffies;
 653
 654 #ifdef ENABLE_MVME16x_NET
 655         if (MACH_IS_MVME16x)
 656                 lp->scp.sysbus = 0x00000054;
 657 #endif
 658 #ifdef ENABLE_BVME6000_NET
 659         if (MACH_IS_BVME6000)
 660                 lp->scp.sysbus = 0x0000004c;
 661 #endif
 662
 663         lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
 664         lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
 665         lp->iscp.stat = ISCP_BUSY;
 666         lp->cmd_backlog = 0;
 667
 668         lp->cmd_head = lp->scb.cmd = I596_NULL;
 669
 670 #ifdef ENABLE_BVME6000_NET
 671         if (MACH_IS_BVME6000) {
 672                 lp->scb.t_on  = 7 * 25;
 673                 lp->scb.t_off = 1 * 25;
 674         }
 675 #endif
 676
 677         DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
 678
 679         CA(dev);
 680
 681         if (wait_istat(dev,lp,1000,"initialization timed out"))
 682                 goto failed;
 683         DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
 684
 685         /* Ensure rx frame/buffer descriptors are tidy */
 686         rebuild_rx_bufs(dev);
 687         lp->scb.command = 0;
 688
 689 #ifdef ENABLE_MVME16x_NET
 690         if (MACH_IS_MVME16x) {
 691                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
 692
 693                 /* Enable ints, etc. now */
 694                 pcc2[0x2a] = 0x55;      /* Edge sensitive */
 695                 pcc2[0x2b] = 0x15;
 696         }
 697 #endif
 698 #ifdef ENABLE_BVME6000_NET
 699         if (MACH_IS_BVME6000) {
 700                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
 701
 702                 *ethirq = 3;
 703         }
 704 #endif
 705
 706
 707         DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
 708         memcpy(lp->cf_cmd.i596_config, init_setup, 14);
 709         lp->cf_cmd.cmd.command = CmdConfigure;
 710         i596_add_cmd(dev, &lp->cf_cmd.cmd);
 711
 712         DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
 713         memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, ETH_ALEN);
 714         lp->sa_cmd.cmd.command = CmdSASetup;
 715         i596_add_cmd(dev, &lp->sa_cmd.cmd);
 716
 717         DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
 718         lp->tdr_cmd.cmd.command = CmdTDR;
 719         i596_add_cmd(dev, &lp->tdr_cmd.cmd);
 720
 721         spin_lock_irqsave (&lp->lock, flags);
 722
 723         if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
 724                 spin_unlock_irqrestore (&lp->lock, flags);
 725                 goto failed;
 726         }
 727         DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
 728         lp->scb.command = RX_START;
 729         CA(dev);
 730
 731         spin_unlock_irqrestore (&lp->lock, flags);
 732
 733         if (wait_cmd(dev,lp,1000,"RX_START not processed"))
 734                 goto failed;
 735         DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
 736         return 0;
 737
 738 failed:
 739         printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
 740         MPU_PORT(dev, PORT_RESET, NULL);
 741         return -1;
 742 }
 743
 744 static inline int i596_rx(struct net_device *dev)
 745 {
 746         struct i596_private *lp = dev->ml_priv;
 747         struct i596_rfd *rfd;
 748         struct i596_rbd *rbd;
 749         int frames = 0;
 750
 751         DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
 752                         lp->rfd_head, lp->rbd_head));
 753
 754         rfd = lp->rfd_head;             /* Ref next frame to check */
 755
 756         while ((rfd->stat) & STAT_C) {  /* Loop while complete frames */
 757                 if (rfd->rbd == I596_NULL)
 758                         rbd = I596_NULL;
 759                 else if (rfd->rbd == lp->rbd_head->b_addr)
 760                         rbd = lp->rbd_head;
 761                 else {
 762                         printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
 763                         /* XXX Now what? */
 764                         rbd = I596_NULL;
 765                 }
 766                 DEB(DEB_RXFRAME, printk(KERN_DEBUG "  rfd %p, rfd.rbd %p, rfd.stat %04x\n",
 767                         rfd, rfd->rbd, rfd->stat));
 768
 769                 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
 770                         /* a good frame */
 771                         int pkt_len = rbd->count & 0x3fff;
 772                         struct sk_buff *skb = rbd->skb;
 773                         int rx_in_place = 0;
 774
 775                         DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
 776                         frames++;
 777
 778                         /* Check if the packet is long enough to just accept
 779                          * without copying to a properly sized skbuff.
 780                          */
 781
 782                         if (pkt_len > rx_copybreak) {
 783                                 struct sk_buff *newskb;
 784
 785                                 /* Get fresh skbuff to replace filled one. */
 786                                 newskb = netdev_alloc_skb(dev, PKT_BUF_SZ);
 787                                 if (newskb == NULL) {
 788                                         skb = NULL;     /* drop pkt */
 789                                         goto memory_squeeze;
 790                                 }
 791                                 /* Pass up the skb already on the Rx ring. */
 792                                 skb_put(skb, pkt_len);
 793                                 rx_in_place = 1;
 794                                 rbd->skb = newskb;
 795                                 rbd->v_data = newskb->data;
 796                                 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
 797 #ifdef __mc68000__
 798                                 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
 799 #endif
 800                         } else {
 801                                 skb = netdev_alloc_skb(dev, pkt_len + 2);
 802                         }
 803 memory_squeeze:
 804                         if (skb == NULL) {
 805                                 /* XXX tulip.c can defer packets here!! */
 806                                 dev->stats.rx_dropped++;
 807                         } else {
 808                                 if (!rx_in_place) {
 809                                         /* 16 byte align the data fields */
 810                                         skb_reserve(skb, 2);
 811                                         skb_put_data(skb, rbd->v_data,
 812                                                      pkt_len);
 813                                 }
 814                                 skb->protocol=eth_type_trans(skb,dev);
 815                                 skb->len = pkt_len;
 816 #ifdef __mc68000__
 817                                 cache_clear(virt_to_phys(rbd->skb->data),
 818                                                 pkt_len);
 819 #endif
 820                                 netif_rx(skb);
 821                                 dev->stats.rx_packets++;
 822                                 dev->stats.rx_bytes+=pkt_len;
 823                         }
 824                 }
 825                 else {
 826                         DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
 827                                         dev->name, rfd->stat));
 828                         dev->stats.rx_errors++;
 829                         if ((rfd->stat) & 0x0001)
 830                                 dev->stats.collisions++;
 831                         if ((rfd->stat) & 0x0080)
 832                                 dev->stats.rx_length_errors++;
 833                         if ((rfd->stat) & 0x0100)
 834                                 dev->stats.rx_over_errors++;
 835                         if ((rfd->stat) & 0x0200)
 836                                 dev->stats.rx_fifo_errors++;
 837                         if ((rfd->stat) & 0x0400)
 838                                 dev->stats.rx_frame_errors++;
 839                         if ((rfd->stat) & 0x0800)
 840                                 dev->stats.rx_crc_errors++;
 841                         if ((rfd->stat) & 0x1000)
 842                                 dev->stats.rx_length_errors++;
 843                 }
 844
 845                 /* Clear the buffer descriptor count and EOF + F flags */
 846
 847                 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
 848                         rbd->count = 0;
 849                         lp->rbd_head = rbd->v_next;
 850                 }
 851
 852                 /* Tidy the frame descriptor, marking it as end of list */
 853
 854                 rfd->rbd = I596_NULL;
 855                 rfd->stat = 0;
 856                 rfd->cmd = CMD_EOL|CMD_FLEX;
 857                 rfd->count = 0;
 858
 859                 /* Remove end-of-list from old end descriptor */
 860
 861                 rfd->v_prev->cmd = CMD_FLEX;
 862
 863                 /* Update record of next frame descriptor to process */
 864
 865                 lp->scb.rfd = rfd->b_next;
 866                 lp->rfd_head = rfd->v_next;
 867                 rfd = lp->rfd_head;
 868         }
 869
 870         DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
 871
 872         return 0;
 873 }
 874
 875
 876 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
 877 {
 878         struct i596_cmd *ptr;
 879
 880         while (lp->cmd_head != I596_NULL) {
 881                 ptr = lp->cmd_head;
 882                 lp->cmd_head = ptr->v_next;
 883                 lp->cmd_backlog--;
 884
 885                 switch ((ptr->command) & 0x7) {
 886                 case CmdTx:
 887                         {
 888                                 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
 889                                 struct sk_buff *skb = tx_cmd->skb;
 890
 891                                 dev_kfree_skb(skb);
 892
 893                                 dev->stats.tx_errors++;
 894                                 dev->stats.tx_aborted_errors++;
 895
 896                                 ptr->v_next = ptr->b_next = I596_NULL;
 897                                 tx_cmd->cmd.command = 0;  /* Mark as free */
 898                                 break;
 899                         }
 900                 default:
 901                         ptr->v_next = ptr->b_next = I596_NULL;
 902                 }
 903         }
 904
 905         wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
 906         lp->scb.cmd = I596_NULL;
 907 }
 908
 909 static void i596_reset(struct net_device *dev, struct i596_private *lp,
 910                         int ioaddr)
 911 {
 912         unsigned long flags;
 913
 914         DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
 915
 916         spin_lock_irqsave (&lp->lock, flags);
 917
 918         wait_cmd(dev,lp,100,"i596_reset timed out");
 919
 920         netif_stop_queue(dev);
 921
 922         lp->scb.command = CUC_ABORT | RX_ABORT;
 923         CA(dev);
 924
 925         /* wait for shutdown */
 926         wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
 927         spin_unlock_irqrestore (&lp->lock, flags);
 928
 929         i596_cleanup_cmd(dev,lp);
 930         i596_rx(dev);
 931
 932         netif_start_queue(dev);
 933         init_i596_mem(dev);
 934 }
 935
 936 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
 937 {
 938         struct i596_private *lp = dev->ml_priv;
 939         int ioaddr = dev->base_addr;
 940         unsigned long flags;
 941
 942         DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
 943
 944         cmd->status = 0;
 945         cmd->command |= (CMD_EOL | CMD_INTR);
 946         cmd->v_next = cmd->b_next = I596_NULL;
 947
 948         spin_lock_irqsave (&lp->lock, flags);
 949
 950         if (lp->cmd_head != I596_NULL) {
 951                 lp->cmd_tail->v_next = cmd;
 952                 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
 953         } else {
 954                 lp->cmd_head = cmd;
 955                 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
 956                 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
 957                 lp->scb.command = CUC_START;
 958                 CA(dev);
 959         }
 960         lp->cmd_tail = cmd;
 961         lp->cmd_backlog++;
 962
 963         spin_unlock_irqrestore (&lp->lock, flags);
 964
 965         if (lp->cmd_backlog > max_cmd_backlog) {
 966                 unsigned long tickssofar = jiffies - lp->last_cmd;
 967
 968                 if (tickssofar < ticks_limit)
 969                         return;
 970
 971                 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
 972
 973                 i596_reset(dev, lp, ioaddr);
 974         }
 975 }
 976
 977 static int i596_open(struct net_device *dev)
 978 {
 979         int res = 0;
 980
 981         DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
 982
 983         if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
 984                 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
 985                 return -EAGAIN;
 986         }
 987 #ifdef ENABLE_MVME16x_NET
 988         if (MACH_IS_MVME16x) {
 989                 if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) {
 990                         res = -EAGAIN;
 991                         goto err_irq_dev;
 992                 }
 993         }
 994 #endif
 995         res = init_rx_bufs(dev);
 996         if (res)
 997                 goto err_irq_56;
 998
 999         netif_start_queue(dev);
1000
1001         if (init_i596_mem(dev)) {
1002                 res = -EAGAIN;
1003                 goto err_queue;
1004         }
1005
1006         return 0;
1007
1008 err_queue:
1009         netif_stop_queue(dev);
1010         remove_rx_bufs(dev);
1011 err_irq_56:
1012 #ifdef ENABLE_MVME16x_NET
1013         free_irq(0x56, dev);
1014 err_irq_dev:
1015 #endif
1016         free_irq(dev->irq, dev);
1017
1018         return res;
1019 }
1020
1021 static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue)
1022 {
1023         struct i596_private *lp = dev->ml_priv;
1024         int ioaddr = dev->base_addr;
1025
1026         /* Transmitter timeout, serious problems. */
1027         DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1028                         dev->name));
1029
1030         dev->stats.tx_errors++;
1031
1032         /* Try to restart the adaptor */
1033         if (lp->last_restart == dev->stats.tx_packets) {
1034                 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1035                 /* Shutdown and restart */
1036                 i596_reset (dev, lp, ioaddr);
1037         } else {
1038                 /* Issue a channel attention signal */
1039                 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1040                 lp->scb.command = CUC_START | RX_START;
1041                 CA (dev);
1042                 lp->last_restart = dev->stats.tx_packets;
1043         }
1044
1045         netif_trans_update(dev); /* prevent tx timeout */
1046         netif_wake_queue (dev);
1047 }
1048
1049 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1050 {
1051         struct i596_private *lp = dev->ml_priv;
1052         struct tx_cmd *tx_cmd;
1053         struct i596_tbd *tbd;
1054         short length = skb->len;
1055
1056         DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1057                                 dev->name, skb->len, skb->data));
1058
1059         if (skb->len < ETH_ZLEN) {
1060                 if (skb_padto(skb, ETH_ZLEN))
1061                         return NETDEV_TX_OK;
1062                 length = ETH_ZLEN;
1063         }
1064         netif_stop_queue(dev);
1065
1066         tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1067         tbd = lp->tbds + lp->next_tx_cmd;
1068
1069         if (tx_cmd->cmd.command) {
1070                 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1071                                 dev->name);
1072                 dev->stats.tx_dropped++;
1073
1074                 dev_kfree_skb(skb);
1075         } else {
1076                 if (++lp->next_tx_cmd == TX_RING_SIZE)
1077                         lp->next_tx_cmd = 0;
1078                 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1079                 tbd->next = I596_NULL;
1080
1081                 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1082                 tx_cmd->skb = skb;
1083
1084                 tx_cmd->pad = 0;
1085                 tx_cmd->size = 0;
1086                 tbd->pad = 0;
1087                 tbd->size = EOF | length;
1088
1089                 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1090
1091 #ifdef __mc68000__
1092                 cache_push(virt_to_phys(skb->data), length);
1093 #endif
1094                 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1095                 i596_add_cmd(dev, &tx_cmd->cmd);
1096
1097                 dev->stats.tx_packets++;
1098                 dev->stats.tx_bytes += length;
1099         }
1100
1101         netif_start_queue(dev);
1102
1103         return NETDEV_TX_OK;
1104 }
1105
1106 static void print_eth(unsigned char *add, char *str)
1107 {
1108         printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
1109                add, add + 6, add, add[12], add[13], str);
1110 }
1111
1112 static const struct net_device_ops i596_netdev_ops = {
1113         .ndo_open               = i596_open,
1114         .ndo_stop               = i596_close,
1115         .ndo_start_xmit         = i596_start_xmit,
1116         .ndo_set_rx_mode        = set_multicast_list,
1117         .ndo_tx_timeout         = i596_tx_timeout,
1118         .ndo_set_mac_address    = eth_mac_addr,
1119         .ndo_validate_addr      = eth_validate_addr,
1120 };
1121
1122 static struct net_device * __init i82596_probe(void)
1123 {
1124         struct net_device *dev;
1125         int i;
1126         struct i596_private *lp;
1127         char eth_addr[8];
1128         static int probed;
1129         int err;
1130
1131         if (probed)
1132                 return ERR_PTR(-ENODEV);
1133         probed++;
1134
1135         dev = alloc_etherdev(0);
1136         if (!dev)
1137                 return ERR_PTR(-ENOMEM);
1138
1139 #ifdef ENABLE_MVME16x_NET
1140         if (MACH_IS_MVME16x) {
1141                 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1142                         printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1143                         err = -ENODEV;
1144                         goto out;
1145                 }
1146                 memcpy(eth_addr, absolute_pointer(0xfffc1f2c), ETH_ALEN); /* YUCK! Get addr from NOVRAM */
1147                 dev->base_addr = MVME_I596_BASE;
1148                 dev->irq = (unsigned) MVME16x_IRQ_I596;
1149                 goto found;
1150         }
1151 #endif
1152 #ifdef ENABLE_BVME6000_NET
1153         if (MACH_IS_BVME6000) {
1154                 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1155                 unsigned char msr = rtc[3];
1156                 int i;
1157
1158                 rtc[3] |= 0x80;
1159                 for (i = 0; i < 6; i++)
1160                         eth_addr[i] = rtc[i * 4 + 7];   /* Stored in RTC RAM at offset 1 */
1161                 rtc[3] = msr;
1162                 dev->base_addr = BVME_I596_BASE;
1163                 dev->irq = (unsigned) BVME_IRQ_I596;
1164                 goto found;
1165         }
1166 #endif
1167         err = -ENODEV;
1168         goto out;
1169
1170 found:
1171         dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1172         if (!dev->mem_start) {
1173                 err = -ENOMEM;
1174                 goto out1;
1175         }
1176
1177         DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1178
1179         for (i = 0; i < 6; i++)
1180                 DEB(DEB_PROBE,printk(" %2.2X", eth_addr[i]));
1181         eth_hw_addr_set(dev, eth_addr);
1182
1183         DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1184
1185         DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1186
1187         /* The 82596-specific entries in the device structure. */
1188         dev->netdev_ops = &i596_netdev_ops;
1189         dev->watchdog_timeo = TX_TIMEOUT;
1190
1191         dev->ml_priv = (void *)(dev->mem_start);
1192
1193         lp = dev->ml_priv;
1194         DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1195                         "lp->scb at 0x%08lx\n",
1196                         dev->name, (unsigned long)lp,
1197                         sizeof(struct i596_private), (unsigned long)&lp->scb));
1198         memset((void *) lp, 0, sizeof(struct i596_private));
1199
1200 #ifdef __mc68000__
1201         cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1202         cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1203         kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1204 #endif
1205         lp->scb.command = 0;
1206         lp->scb.cmd = I596_NULL;
1207         lp->scb.rfd = I596_NULL;
1208         spin_lock_init(&lp->lock);
1209
1210         err = register_netdev(dev);
1211         if (err)
1212                 goto out2;
1213         return dev;
1214 out2:
1215 #ifdef __mc68000__
1216         /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1217          * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1218          */
1219         kernel_set_cachemode((void *)(dev->mem_start), 4096,
1220                         IOMAP_FULL_CACHING);
1221 #endif
1222         free_page ((u32)(dev->mem_start));
1223 out1:
1224 out:
1225         free_netdev(dev);
1226         return ERR_PTR(err);
1227 }
1228
1229 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1230 {
1231         struct net_device *dev = dev_id;
1232         struct i596_private *lp;
1233         short ioaddr;
1234         unsigned short status, ack_cmd = 0;
1235         int handled = 0;
1236
1237 #ifdef ENABLE_BVME6000_NET
1238         if (MACH_IS_BVME6000) {
1239                 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1240                         i596_error(irq, dev_id);
1241                         return IRQ_HANDLED;
1242                 }
1243         }
1244 #endif
1245         if (dev == NULL) {
1246                 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1247                 return IRQ_NONE;
1248         }
1249
1250         ioaddr = dev->base_addr;
1251         lp = dev->ml_priv;
1252
1253         spin_lock (&lp->lock);
1254
1255         wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1256         status = lp->scb.status;
1257
1258         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1259                         dev->name, irq, status));
1260
1261         ack_cmd = status & 0xf000;
1262
1263         if ((status & 0x8000) || (status & 0x2000)) {
1264                 struct i596_cmd *ptr;
1265
1266                 handled = 1;
1267                 if ((status & 0x8000))
1268                         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1269                 if ((status & 0x2000))
1270                         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1271
1272                 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1273                         ptr = lp->cmd_head;
1274
1275                         DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1276                                        lp->cmd_head->status, lp->cmd_head->command));
1277                         lp->cmd_head = ptr->v_next;
1278                         lp->cmd_backlog--;
1279
1280                         switch ((ptr->command) & 0x7) {
1281                         case CmdTx:
1282                             {
1283                                 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1284                                 struct sk_buff *skb = tx_cmd->skb;
1285
1286                                 if ((ptr->status) & STAT_OK) {
1287                                         DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1288                                 } else {
1289                                         dev->stats.tx_errors++;
1290                                         if ((ptr->status) & 0x0020)
1291                                                 dev->stats.collisions++;
1292                                         if (!((ptr->status) & 0x0040))
1293                                                 dev->stats.tx_heartbeat_errors++;
1294                                         if ((ptr->status) & 0x0400)
1295                                                 dev->stats.tx_carrier_errors++;
1296                                         if ((ptr->status) & 0x0800)
1297                                                 dev->stats.collisions++;
1298                                         if ((ptr->status) & 0x1000)
1299                                                 dev->stats.tx_aborted_errors++;
1300                                 }
1301
1302                                 dev_consume_skb_irq(skb);
1303
1304                                 tx_cmd->cmd.command = 0; /* Mark free */
1305                                 break;
1306                             }
1307                         case CmdTDR:
1308                             {
1309                                 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1310
1311                                 if (status & 0x8000) {
1312                                         DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1313                                 } else {
1314                                         if (status & 0x4000)
1315                                                 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1316                                         if (status & 0x2000)
1317                                                 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1318                                         if (status & 0x1000)
1319                                                 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1320
1321                                         DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1322                                 }
1323                                 break;
1324                             }
1325                         case CmdConfigure:
1326                         case CmdMulticastList:
1327                                 /* Zap command so set_multicast_list() knows it is free */
1328                                 ptr->command = 0;
1329                                 break;
1330                         }
1331                         ptr->v_next = ptr->b_next = I596_NULL;
1332                         lp->last_cmd = jiffies;
1333                 }
1334
1335                 ptr = lp->cmd_head;
1336                 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1337                         ptr->command &= 0x1fff;
1338                         ptr = ptr->v_next;
1339                 }
1340
1341                 if ((lp->cmd_head != I596_NULL))
1342                         ack_cmd |= CUC_START;
1343                 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1344         }
1345         if ((status & 0x1000) || (status & 0x4000)) {
1346                 if ((status & 0x4000))
1347                         DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1348                 i596_rx(dev);
1349                 /* Only RX_START if stopped - RGH 07-07-96 */
1350                 if (status & 0x1000) {
1351                         if (netif_running(dev)) {
1352                                 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1353                                 ack_cmd |= RX_START;
1354                                 dev->stats.rx_errors++;
1355                                 dev->stats.rx_fifo_errors++;
1356                                 rebuild_rx_bufs(dev);
1357                         }
1358                 }
1359         }
1360         wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1361         lp->scb.command = ack_cmd;
1362
1363 #ifdef ENABLE_MVME16x_NET
1364         if (MACH_IS_MVME16x) {
1365                 /* Ack the interrupt */
1366
1367                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1368
1369                 pcc2[0x2a] |= 0x08;
1370         }
1371 #endif
1372 #ifdef ENABLE_BVME6000_NET
1373         if (MACH_IS_BVME6000) {
1374                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1375
1376                 *ethirq = 1;
1377                 *ethirq = 3;
1378         }
1379 #endif
1380         CA(dev);
1381
1382         DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1383
1384         spin_unlock (&lp->lock);
1385         return IRQ_RETVAL(handled);
1386 }
1387
1388 static int i596_close(struct net_device *dev)
1389 {
1390         struct i596_private *lp = dev->ml_priv;
1391         unsigned long flags;
1392
1393         netif_stop_queue(dev);
1394
1395         DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1396                        dev->name, lp->scb.status));
1397
1398         spin_lock_irqsave(&lp->lock, flags);
1399
1400         wait_cmd(dev,lp,100,"close1 timed out");
1401         lp->scb.command = CUC_ABORT | RX_ABORT;
1402         CA(dev);
1403
1404         wait_cmd(dev,lp,100,"close2 timed out");
1405
1406         spin_unlock_irqrestore(&lp->lock, flags);
1407         DEB(DEB_STRUCT,i596_display_data(dev));
1408         i596_cleanup_cmd(dev,lp);
1409
1410 #ifdef ENABLE_MVME16x_NET
1411         if (MACH_IS_MVME16x) {
1412                 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1413
1414                 /* Disable all ints */
1415                 pcc2[0x28] = 1;
1416                 pcc2[0x2a] = 0x40;
1417                 pcc2[0x2b] = 0x40;      /* Set snooping bits now! */
1418         }
1419 #endif
1420 #ifdef ENABLE_BVME6000_NET
1421         if (MACH_IS_BVME6000) {
1422                 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1423
1424                 *ethirq = 1;
1425         }
1426 #endif
1427
1428 #ifdef ENABLE_MVME16x_NET
1429         free_irq(0x56, dev);
1430 #endif
1431         free_irq(dev->irq, dev);
1432         remove_rx_bufs(dev);
1433
1434         return 0;
1435 }
1436
1437 /*
1438  *    Set or clear the multicast filter for this adaptor.
1439  */
1440
1441 static void set_multicast_list(struct net_device *dev)
1442 {
1443         struct i596_private *lp = dev->ml_priv;
1444         int config = 0, cnt;
1445
1446         DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1447                 dev->name, netdev_mc_count(dev),
1448                 dev->flags & IFF_PROMISC  ? "ON" : "OFF",
1449                 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1450
1451         if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1452                 return;
1453
1454         if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1455                 lp->cf_cmd.i596_config[8] |= 0x01;
1456                 config = 1;
1457         }
1458         if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1459                 lp->cf_cmd.i596_config[8] &= ~0x01;
1460                 config = 1;
1461         }
1462         if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1463                 lp->cf_cmd.i596_config[11] &= ~0x20;
1464                 config = 1;
1465         }
1466         if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1467                 lp->cf_cmd.i596_config[11] |= 0x20;
1468                 config = 1;
1469         }
1470         if (config) {
1471                 lp->cf_cmd.cmd.command = CmdConfigure;
1472                 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1473         }
1474
1475         cnt = netdev_mc_count(dev);
1476         if (cnt > MAX_MC_CNT)
1477         {
1478                 cnt = MAX_MC_CNT;
1479                 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1480                         dev->name, cnt);
1481         }
1482
1483         if (!netdev_mc_empty(dev)) {
1484                 struct netdev_hw_addr *ha;
1485                 unsigned char *cp;
1486                 struct mc_cmd *cmd;
1487
1488                 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1489                         return;
1490                 cmd = &lp->mc_cmd;
1491                 cmd->cmd.command = CmdMulticastList;
1492                 cmd->mc_cnt = cnt * ETH_ALEN;
1493                 cp = cmd->mc_addrs;
1494                 netdev_for_each_mc_addr(ha, dev) {
1495                         if (!cnt--)
1496                                 break;
1497                         memcpy(cp, ha->addr, ETH_ALEN);
1498                         if (i596_debug > 1)
1499                                 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
1500                                                 dev->name, cp));
1501                         cp += ETH_ALEN;
1502                 }
1503                 i596_add_cmd(dev, &cmd->cmd);
1504         }
1505 }
1506
1507 static struct net_device *dev_82596;
1508
1509 static int debug = -1;
1510 module_param(debug, int, 0);
1511 MODULE_PARM_DESC(debug, "i82596 debug mask");
1512
1513 static int __init i82596_init(void)
1514 {
1515         if (debug >= 0)
1516                 i596_debug = debug;
1517         dev_82596 = i82596_probe();
1518         return PTR_ERR_OR_ZERO(dev_82596);
1519 }
1520 module_init(i82596_init);
1521
1522 static void __exit i82596_cleanup(void)
1523 {
1524         unregister_netdev(dev_82596);
1525 #ifdef __mc68000__
1526         /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1527          * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1528          */
1529
1530         kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1531                         IOMAP_FULL_CACHING);
1532 #endif
1533         free_page ((u32)(dev_82596->mem_start));
1534         free_netdev(dev_82596);
1535 }
1536 module_exit(i82596_cleanup);