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 62static 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 defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE) 93#define ENABLE_MVME16x_NET 94#endif 95#if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE) 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 150static int i596_debug = (DEB_SERIOUS|DEB_PROBE); 151 152MODULE_AUTHOR("Richard Hirst"); 153MODULE_DESCRIPTION("i82596 driver"); 154MODULE_LICENSE("GPL"); 155 156module_param(i596_debug, int, 0); 157MODULE_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 */ 163static 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 178enum 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 200struct 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 209struct 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 226struct 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 233struct 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 241struct tdr_cmd { 242 struct i596_cmd cmd; 243 unsigned short status; 244 unsigned short pad; 245}; 246 247struct mc_cmd { 248 struct i596_cmd cmd; 249 short mc_cnt; 250 char mc_addrs[MAX_MC_CNT*6]; 251}; 252 253struct sa_cmd { 254 struct i596_cmd cmd; 255 char eth_addr[8]; 256}; 257 258struct cf_cmd { 259 struct i596_cmd cmd; 260 char i596_config[16]; 261}; 262 263struct 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 274struct 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 290struct 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 305struct i596_iscp { 306 unsigned long stat; 307 struct i596_scb *scb; 308}; 309 310struct i596_scp { 311 unsigned long sysbus; 312 unsigned long pad; 313 struct i596_iscp *iscp; 314}; 315 316struct 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 340static 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 361static int i596_open(struct net_device *dev); 362static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev); 363static irqreturn_t i596_interrupt(int irq, void *dev_id); 364static int i596_close(struct net_device *dev); 365static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); 366static void i596_tx_timeout (struct net_device *dev); 367static void print_eth(unsigned char *buf, char *str); 368static void set_multicast_list(struct net_device *dev); 369 370static int rx_ring_size = RX_RING_SIZE; 371static int ticks_limit = 25; 372static int max_cmd_backlog = TX_RING_SIZE-1; 373 374 375static 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 392static 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 413static 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 427static 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 441static 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 456static 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) 501static 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 526static 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 540static 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 596static 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 615static 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 739failed: 740 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name); 741 MPU_PORT(dev, PORT_RESET, NULL); 742 return -1; 743} 744 745static 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 } 804memory_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 memcpy(skb_put(skb,pkt_len), rbd->v_data, 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 876static 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 909static 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 936static 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 977static 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 1008err_queue: 1009 netif_stop_queue(dev); 1010 remove_rx_bufs(dev); 1011err_irq_56: 1012#ifdef ENABLE_MVME16x_NET 1013 free_irq(0x56, dev); 1014err_irq_dev: 1015#endif 1016 free_irq(dev->irq, dev); 1017 1018 return res; 1019} 1020 1021static void i596_tx_timeout (struct net_device *dev) 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 dev->trans_start = jiffies; /* prevent tx timeout */ 1046 netif_wake_queue (dev); 1047} 1048 1049static 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 1106static 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 1112static int io = 0x300; 1113static int irq = 10; 1114 1115static const struct net_device_ops i596_netdev_ops = { 1116 .ndo_open = i596_open, 1117 .ndo_stop = i596_close, 1118 .ndo_start_xmit = i596_start_xmit, 1119 .ndo_set_rx_mode = set_multicast_list, 1120 .ndo_tx_timeout = i596_tx_timeout, 1121 .ndo_change_mtu = eth_change_mtu, 1122 .ndo_set_mac_address = eth_mac_addr, 1123 .ndo_validate_addr = eth_validate_addr, 1124}; 1125 1126struct 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 1182found: 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; 1225out2: 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)); 1234out1: 1235out: 1236 free_netdev(dev); 1237 return ERR_PTR(err); 1238} 1239 1240static 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_kfree_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 1399static 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 1452static 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 1519static struct net_device *dev_82596; 1520 1521static int debug = -1; 1522module_param(debug, int, 0); 1523MODULE_PARM_DESC(debug, "i82596 debug mask"); 1524 1525int __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 1533void __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 */ 1549