1 /* 82596.c: A generic 82596 ethernet driver for linux. */ 2 /* 3 Based on Apricot.c 4 Written 1994 by Mark Evans. 5 This driver is for the Apricot 82596 bus-master interface 6 7 Modularised 12/94 Mark Evans 8 9 10 Modified to support the 82596 ethernet chips on 680x0 VME boards. 11 by Richard Hirst <richard@sleepie.demon.co.uk> 12 Renamed to be 82596.c 13 14 980825: Changed to receive directly in to sk_buffs which are 15 allocated at open() time. Eliminates copy on incoming frames 16 (small ones are still copied). Shared data now held in a 17 non-cached page, so we can run on 68060 in copyback mode. 18 19 TBD: 20 * look at deferring rx frames rather than discarding (as per tulip) 21 * handle tx ring full as per tulip 22 * performance test to tune rx_copybreak 23 24 Most of my modifications relate to the braindead big-endian 25 implementation by Intel. When the i596 is operating in 26 'big-endian' mode, it thinks a 32 bit value of 0x12345678 27 should be stored as 0x56781234. This is a real pain, when 28 you have linked lists which are shared by the 680x0 and the 29 i596. 30 31 Driver skeleton 32 Written 1993 by Donald Becker. 33 Copyright 1993 United States Government as represented by the Director, 34 National Security Agency. This software may only be used and distributed 35 according to the terms of the GNU General Public License as modified by SRC, 36 incorporated herein by reference. 37 38 The author may be reached as becker@scyld.com, or C/O 39 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 40 41 */ 42 43 #include <linux/module.h> 44 #include <linux/kernel.h> 45 #include <linux/string.h> 46 #include <linux/errno.h> 47 #include <linux/ioport.h> 48 #include <linux/interrupt.h> 49 #include <linux/delay.h> 50 #include <linux/netdevice.h> 51 #include <linux/etherdevice.h> 52 #include <linux/skbuff.h> 53 #include <linux/init.h> 54 #include <linux/bitops.h> 55 #include <linux/gfp.h> 56 57 #include <asm/io.h> 58 #include <asm/dma.h> 59 #include <asm/pgtable.h> 60 #include <asm/cacheflush.h> 61 62 static char version[] __initdata = 63 "82596.c $Revision: 1.5 $\n"; 64 65 #define DRV_NAME "82596" 66 67 /* DEBUG flags 68 */ 69 70 #define DEB_INIT 0x0001 71 #define DEB_PROBE 0x0002 72 #define DEB_SERIOUS 0x0004 73 #define DEB_ERRORS 0x0008 74 #define DEB_MULTI 0x0010 75 #define DEB_TDR 0x0020 76 #define DEB_OPEN 0x0040 77 #define DEB_RESET 0x0080 78 #define DEB_ADDCMD 0x0100 79 #define DEB_STATUS 0x0200 80 #define DEB_STARTTX 0x0400 81 #define DEB_RXADDR 0x0800 82 #define DEB_TXADDR 0x1000 83 #define DEB_RXFRAME 0x2000 84 #define DEB_INTS 0x4000 85 #define DEB_STRUCT 0x8000 86 #define DEB_ANY 0xffff 87 88 89 #define DEB(x,y) if (i596_debug & (x)) y 90 91 92 #if 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 #if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE) 99 #define ENABLE_APRICOT 100 #endif 101 102 #ifdef ENABLE_MVME16x_NET 103 #include <asm/mvme16xhw.h> 104 #endif 105 #ifdef ENABLE_BVME6000_NET 106 #include <asm/bvme6000hw.h> 107 #endif 108 109 /* 110 * Define various macros for Channel Attention, word swapping etc., dependent 111 * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel. 112 */ 113 114 #ifdef __mc68000__ 115 #define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) 116 #define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) 117 #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16))) 118 #define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) 119 #define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) 120 #define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) 121 #define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) 122 #define ISCP_BUSY 0x00010000 123 #define MACH_IS_APRICOT 0 124 #else 125 #define WSWAPrfd(x) ((struct i596_rfd *)((long)x)) 126 #define WSWAPrbd(x) ((struct i596_rbd *)((long)x)) 127 #define WSWAPiscp(x) ((struct i596_iscp *)((long)x)) 128 #define WSWAPscb(x) ((struct i596_scb *)((long)x)) 129 #define WSWAPcmd(x) ((struct i596_cmd *)((long)x)) 130 #define WSWAPtbd(x) ((struct i596_tbd *)((long)x)) 131 #define WSWAPchar(x) ((char *)((long)x)) 132 #define ISCP_BUSY 0x0001 133 #define MACH_IS_APRICOT 1 134 #endif 135 136 /* 137 * The MPU_PORT command allows direct access to the 82596. With PORT access 138 * the following commands are available (p5-18). The 32-bit port command 139 * must be word-swapped with the most significant word written first. 140 * This only applies to VME boards. 141 */ 142 #define PORT_RESET 0x00 /* reset 82596 */ 143 #define PORT_SELFTEST 0x01 /* selftest */ 144 #define PORT_ALTSCP 0x02 /* alternate SCB address */ 145 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ 146 147 static int i596_debug = (DEB_SERIOUS|DEB_PROBE); 148 149 MODULE_AUTHOR("Richard Hirst"); 150 MODULE_DESCRIPTION("i82596 driver"); 151 MODULE_LICENSE("GPL"); 152 153 module_param(i596_debug, int, 0); 154 MODULE_PARM_DESC(i596_debug, "i82596 debug mask"); 155 156 157 /* Copy frames shorter than rx_copybreak, otherwise pass on up in 158 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha). 159 */ 160 static int rx_copybreak = 100; 161 162 #define PKT_BUF_SZ 1536 163 #define MAX_MC_CNT 64 164 165 #define I596_TOTAL_SIZE 17 166 167 #define I596_NULL ((void *)0xffffffff) 168 169 #define CMD_EOL 0x8000 /* The last command of the list, stop. */ 170 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ 171 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ 172 173 #define CMD_FLEX 0x0008 /* Enable flexible memory model */ 174 175 enum commands { 176 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, 177 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 178 }; 179 180 #define STAT_C 0x8000 /* Set to 0 after execution */ 181 #define STAT_B 0x4000 /* Command being executed */ 182 #define STAT_OK 0x2000 /* Command executed ok */ 183 #define STAT_A 0x1000 /* Command aborted */ 184 185 #define CUC_START 0x0100 186 #define CUC_RESUME 0x0200 187 #define CUC_SUSPEND 0x0300 188 #define CUC_ABORT 0x0400 189 #define RX_START 0x0010 190 #define RX_RESUME 0x0020 191 #define RX_SUSPEND 0x0030 192 #define RX_ABORT 0x0040 193 194 #define TX_TIMEOUT (HZ/20) 195 196 197 struct i596_reg { 198 unsigned short porthi; 199 unsigned short portlo; 200 unsigned long ca; 201 }; 202 203 #define EOF 0x8000 204 #define SIZE_MASK 0x3fff 205 206 struct i596_tbd { 207 unsigned short size; 208 unsigned short pad; 209 struct i596_tbd *next; 210 char *data; 211 }; 212 213 /* The command structure has two 'next' pointers; v_next is the address of 214 * the next command as seen by the CPU, b_next is the address of the next 215 * command as seen by the 82596. The b_next pointer, as used by the 82596 216 * always references the status field of the next command, rather than the 217 * v_next field, because the 82596 is unaware of v_next. It may seem more 218 * logical to put v_next at the end of the structure, but we cannot do that 219 * because the 82596 expects other fields to be there, depending on command 220 * type. 221 */ 222 223 struct i596_cmd { 224 struct i596_cmd *v_next; /* Address from CPUs viewpoint */ 225 unsigned short status; 226 unsigned short command; 227 struct i596_cmd *b_next; /* Address from i596 viewpoint */ 228 }; 229 230 struct tx_cmd { 231 struct i596_cmd cmd; 232 struct i596_tbd *tbd; 233 unsigned short size; 234 unsigned short pad; 235 struct sk_buff *skb; /* So we can free it after tx */ 236 }; 237 238 struct tdr_cmd { 239 struct i596_cmd cmd; 240 unsigned short status; 241 unsigned short pad; 242 }; 243 244 struct mc_cmd { 245 struct i596_cmd cmd; 246 short mc_cnt; 247 char mc_addrs[MAX_MC_CNT*6]; 248 }; 249 250 struct sa_cmd { 251 struct i596_cmd cmd; 252 char eth_addr[8]; 253 }; 254 255 struct cf_cmd { 256 struct i596_cmd cmd; 257 char i596_config[16]; 258 }; 259 260 struct i596_rfd { 261 unsigned short stat; 262 unsigned short cmd; 263 struct i596_rfd *b_next; /* Address from i596 viewpoint */ 264 struct i596_rbd *rbd; 265 unsigned short count; 266 unsigned short size; 267 struct i596_rfd *v_next; /* Address from CPUs viewpoint */ 268 struct i596_rfd *v_prev; 269 }; 270 271 struct i596_rbd { 272 unsigned short count; 273 unsigned short zero1; 274 struct i596_rbd *b_next; 275 unsigned char *b_data; /* Address from i596 viewpoint */ 276 unsigned short size; 277 unsigned short zero2; 278 struct sk_buff *skb; 279 struct i596_rbd *v_next; 280 struct i596_rbd *b_addr; /* This rbd addr from i596 view */ 281 unsigned char *v_data; /* Address from CPUs viewpoint */ 282 }; 283 284 #define TX_RING_SIZE 64 285 #define RX_RING_SIZE 16 286 287 struct i596_scb { 288 unsigned short status; 289 unsigned short command; 290 struct i596_cmd *cmd; 291 struct i596_rfd *rfd; 292 unsigned long crc_err; 293 unsigned long align_err; 294 unsigned long resource_err; 295 unsigned long over_err; 296 unsigned long rcvdt_err; 297 unsigned long short_err; 298 unsigned short t_on; 299 unsigned short t_off; 300 }; 301 302 struct i596_iscp { 303 unsigned long stat; 304 struct i596_scb *scb; 305 }; 306 307 struct i596_scp { 308 unsigned long sysbus; 309 unsigned long pad; 310 struct i596_iscp *iscp; 311 }; 312 313 struct i596_private { 314 volatile struct i596_scp scp; 315 volatile struct i596_iscp iscp; 316 volatile struct i596_scb scb; 317 struct sa_cmd sa_cmd; 318 struct cf_cmd cf_cmd; 319 struct tdr_cmd tdr_cmd; 320 struct mc_cmd mc_cmd; 321 unsigned long stat; 322 int last_restart __attribute__((aligned(4))); 323 struct i596_rfd *rfd_head; 324 struct i596_rbd *rbd_head; 325 struct i596_cmd *cmd_tail; 326 struct i596_cmd *cmd_head; 327 int cmd_backlog; 328 unsigned long last_cmd; 329 struct i596_rfd rfds[RX_RING_SIZE]; 330 struct i596_rbd rbds[RX_RING_SIZE]; 331 struct tx_cmd tx_cmds[TX_RING_SIZE]; 332 struct i596_tbd tbds[TX_RING_SIZE]; 333 int next_tx_cmd; 334 spinlock_t lock; 335 }; 336 337 static char init_setup[] = 338 { 339 0x8E, /* length, prefetch on */ 340 0xC8, /* fifo to 8, monitor off */ 341 #ifdef CONFIG_VME 342 0xc0, /* don't save bad frames */ 343 #else 344 0x80, /* don't save bad frames */ 345 #endif 346 0x2E, /* No source address insertion, 8 byte preamble */ 347 0x00, /* priority and backoff defaults */ 348 0x60, /* interframe spacing */ 349 0x00, /* slot time LSB */ 350 0xf2, /* slot time and retries */ 351 0x00, /* promiscuous mode */ 352 0x00, /* collision detect */ 353 0x40, /* minimum frame length */ 354 0xff, 355 0x00, 356 0x7f /* *multi IA */ }; 357 358 static int i596_open(struct net_device *dev); 359 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev); 360 static irqreturn_t i596_interrupt(int irq, void *dev_id); 361 static int i596_close(struct net_device *dev); 362 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); 363 static void i596_tx_timeout (struct net_device *dev); 364 static void print_eth(unsigned char *buf, char *str); 365 static void set_multicast_list(struct net_device *dev); 366 367 static int rx_ring_size = RX_RING_SIZE; 368 static int ticks_limit = 25; 369 static int max_cmd_backlog = TX_RING_SIZE-1; 370 371 372 static inline void CA(struct net_device *dev) 373 { 374 #ifdef ENABLE_MVME16x_NET 375 if (MACH_IS_MVME16x) { 376 ((struct i596_reg *) dev->base_addr)->ca = 1; 377 } 378 #endif 379 #ifdef ENABLE_BVME6000_NET 380 if (MACH_IS_BVME6000) { 381 volatile u32 i; 382 383 i = *(volatile u32 *) (dev->base_addr); 384 } 385 #endif 386 #ifdef ENABLE_APRICOT 387 if (MACH_IS_APRICOT) { 388 outw(0, (short) (dev->base_addr) + 4); 389 } 390 #endif 391 } 392 393 394 static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x) 395 { 396 #ifdef ENABLE_MVME16x_NET 397 if (MACH_IS_MVME16x) { 398 struct i596_reg *p = (struct i596_reg *) (dev->base_addr); 399 p->porthi = ((c) | (u32) (x)) & 0xffff; 400 p->portlo = ((c) | (u32) (x)) >> 16; 401 } 402 #endif 403 #ifdef ENABLE_BVME6000_NET 404 if (MACH_IS_BVME6000) { 405 u32 v = (u32) (c) | (u32) (x); 406 v = ((u32) (v) << 16) | ((u32) (v) >> 16); 407 *(volatile u32 *) dev->base_addr = v; 408 udelay(1); 409 *(volatile u32 *) dev->base_addr = v; 410 } 411 #endif 412 } 413 414 415 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str) 416 { 417 while (--delcnt && lp->iscp.stat) 418 udelay(10); 419 if (!delcnt) { 420 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", 421 dev->name, str, lp->scb.status, lp->scb.command); 422 return -1; 423 } 424 else 425 return 0; 426 } 427 428 429 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str) 430 { 431 while (--delcnt && lp->scb.command) 432 udelay(10); 433 if (!delcnt) { 434 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", 435 dev->name, str, lp->scb.status, lp->scb.command); 436 return -1; 437 } 438 else 439 return 0; 440 } 441 442 443 static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str) 444 { 445 volatile struct i596_cmd *c = cmd; 446 447 while (--delcnt && c->command) 448 udelay(10); 449 if (!delcnt) { 450 printk(KERN_ERR "%s: %s.\n", dev->name, str); 451 return -1; 452 } 453 else 454 return 0; 455 } 456 457 458 static void i596_display_data(struct net_device *dev) 459 { 460 struct i596_private *lp = dev->ml_priv; 461 struct i596_cmd *cmd; 462 struct i596_rfd *rfd; 463 struct i596_rbd *rbd; 464 465 printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n", 466 &lp->scp, lp->scp.sysbus, lp->scp.iscp); 467 printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n", 468 &lp->iscp, lp->iscp.stat, lp->iscp.scb); 469 printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x," 470 " .cmd = %p, .rfd = %p\n", 471 &lp->scb, lp->scb.status, lp->scb.command, 472 lp->scb.cmd, lp->scb.rfd); 473 printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx," 474 " over %lx, rcvdt %lx, short %lx\n", 475 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err, 476 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err); 477 cmd = lp->cmd_head; 478 while (cmd != I596_NULL) { 479 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n", 480 cmd, cmd->status, cmd->command, cmd->b_next); 481 cmd = cmd->v_next; 482 } 483 rfd = lp->rfd_head; 484 printk(KERN_ERR "rfd_head = %p\n", rfd); 485 do { 486 printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p," 487 " count %04x\n", 488 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd, 489 rfd->count); 490 rfd = rfd->v_next; 491 } while (rfd != lp->rfd_head); 492 rbd = lp->rbd_head; 493 printk(KERN_ERR "rbd_head = %p\n", rbd); 494 do { 495 printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n", 496 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size); 497 rbd = rbd->v_next; 498 } while (rbd != lp->rbd_head); 499 } 500 501 502 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET) 503 static irqreturn_t i596_error(int irq, void *dev_id) 504 { 505 struct net_device *dev = dev_id; 506 #ifdef ENABLE_MVME16x_NET 507 if (MACH_IS_MVME16x) { 508 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; 509 510 pcc2[0x28] = 1; 511 pcc2[0x2b] = 0x1d; 512 } 513 #endif 514 #ifdef ENABLE_BVME6000_NET 515 if (MACH_IS_BVME6000) { 516 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; 517 518 *ethirq = 1; 519 *ethirq = 3; 520 } 521 #endif 522 printk(KERN_ERR "%s: Error interrupt\n", dev->name); 523 i596_display_data(dev); 524 return IRQ_HANDLED; 525 } 526 #endif 527 528 static inline void remove_rx_bufs(struct net_device *dev) 529 { 530 struct i596_private *lp = dev->ml_priv; 531 struct i596_rbd *rbd; 532 int i; 533 534 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) { 535 if (rbd->skb == NULL) 536 break; 537 dev_kfree_skb(rbd->skb); 538 rbd->skb = NULL; 539 } 540 } 541 542 static inline int init_rx_bufs(struct net_device *dev) 543 { 544 struct i596_private *lp = dev->ml_priv; 545 int i; 546 struct i596_rfd *rfd; 547 struct i596_rbd *rbd; 548 549 /* First build the Receive Buffer Descriptor List */ 550 551 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) { 552 struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ); 553 554 if (skb == NULL) { 555 remove_rx_bufs(dev); 556 return -ENOMEM; 557 } 558 559 rbd->v_next = rbd+1; 560 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1)); 561 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd)); 562 rbd->skb = skb; 563 rbd->v_data = skb->data; 564 rbd->b_data = WSWAPchar(virt_to_bus(skb->data)); 565 rbd->size = PKT_BUF_SZ; 566 #ifdef __mc68000__ 567 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ); 568 #endif 569 } 570 lp->rbd_head = lp->rbds; 571 rbd = lp->rbds + rx_ring_size - 1; 572 rbd->v_next = lp->rbds; 573 rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds)); 574 575 /* Now build the Receive Frame Descriptor List */ 576 577 for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) { 578 rfd->rbd = I596_NULL; 579 rfd->v_next = rfd+1; 580 rfd->v_prev = rfd-1; 581 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1)); 582 rfd->cmd = CMD_FLEX; 583 } 584 lp->rfd_head = lp->rfds; 585 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds)); 586 rfd = lp->rfds; 587 rfd->rbd = lp->rbd_head; 588 rfd->v_prev = lp->rfds + rx_ring_size - 1; 589 rfd = lp->rfds + rx_ring_size - 1; 590 rfd->v_next = lp->rfds; 591 rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds)); 592 rfd->cmd = CMD_EOL|CMD_FLEX; 593 594 return 0; 595 } 596 597 598 static void rebuild_rx_bufs(struct net_device *dev) 599 { 600 struct i596_private *lp = dev->ml_priv; 601 int i; 602 603 /* Ensure rx frame/buffer descriptors are tidy */ 604 605 for (i = 0; i < rx_ring_size; i++) { 606 lp->rfds[i].rbd = I596_NULL; 607 lp->rfds[i].cmd = CMD_FLEX; 608 } 609 lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX; 610 lp->rfd_head = lp->rfds; 611 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds)); 612 lp->rbd_head = lp->rbds; 613 lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds)); 614 } 615 616 617 static int init_i596_mem(struct net_device *dev) 618 { 619 struct i596_private *lp = dev->ml_priv; 620 #if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET) || defined(ENABLE_APRICOT) 621 short ioaddr = dev->base_addr; 622 #endif 623 unsigned long flags; 624 625 MPU_PORT(dev, PORT_RESET, NULL); 626 627 udelay(100); /* Wait 100us - seems to help */ 628 629 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET) 630 #ifdef ENABLE_MVME16x_NET 631 if (MACH_IS_MVME16x) { 632 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; 633 634 /* Disable all ints for now */ 635 pcc2[0x28] = 1; 636 pcc2[0x2a] = 0x48; 637 /* Following disables snooping. Snooping is not required 638 * as we make appropriate use of non-cached pages for 639 * shared data, and cache_push/cache_clear. 640 */ 641 pcc2[0x2b] = 0x08; 642 } 643 #endif 644 #ifdef ENABLE_BVME6000_NET 645 if (MACH_IS_BVME6000) { 646 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; 647 648 *ethirq = 1; 649 } 650 #endif 651 652 /* change the scp address */ 653 654 MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp)); 655 656 #elif defined(ENABLE_APRICOT) 657 658 { 659 u32 scp = virt_to_bus(&lp->scp); 660 661 /* change the scp address */ 662 outw(0, ioaddr); 663 outw(0, ioaddr); 664 outb(4, ioaddr + 0xf); 665 outw(scp | 2, ioaddr); 666 outw(scp >> 16, ioaddr); 667 } 668 #endif 669 670 lp->last_cmd = jiffies; 671 672 #ifdef ENABLE_MVME16x_NET 673 if (MACH_IS_MVME16x) 674 lp->scp.sysbus = 0x00000054; 675 #endif 676 #ifdef ENABLE_BVME6000_NET 677 if (MACH_IS_BVME6000) 678 lp->scp.sysbus = 0x0000004c; 679 #endif 680 #ifdef ENABLE_APRICOT 681 if (MACH_IS_APRICOT) 682 lp->scp.sysbus = 0x00440000; 683 #endif 684 685 lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp)); 686 lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb)); 687 lp->iscp.stat = ISCP_BUSY; 688 lp->cmd_backlog = 0; 689 690 lp->cmd_head = lp->scb.cmd = I596_NULL; 691 692 #ifdef ENABLE_BVME6000_NET 693 if (MACH_IS_BVME6000) { 694 lp->scb.t_on = 7 * 25; 695 lp->scb.t_off = 1 * 25; 696 } 697 #endif 698 699 DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name)); 700 701 #if defined(ENABLE_APRICOT) 702 (void) inb(ioaddr + 0x10); 703 outb(4, ioaddr + 0xf); 704 #endif 705 CA(dev); 706 707 if (wait_istat(dev,lp,1000,"initialization timed out")) 708 goto failed; 709 DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name)); 710 711 /* Ensure rx frame/buffer descriptors are tidy */ 712 rebuild_rx_bufs(dev); 713 lp->scb.command = 0; 714 715 #ifdef ENABLE_MVME16x_NET 716 if (MACH_IS_MVME16x) { 717 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; 718 719 /* Enable ints, etc. now */ 720 pcc2[0x2a] = 0x55; /* Edge sensitive */ 721 pcc2[0x2b] = 0x15; 722 } 723 #endif 724 #ifdef ENABLE_BVME6000_NET 725 if (MACH_IS_BVME6000) { 726 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; 727 728 *ethirq = 3; 729 } 730 #endif 731 732 733 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name)); 734 memcpy(lp->cf_cmd.i596_config, init_setup, 14); 735 lp->cf_cmd.cmd.command = CmdConfigure; 736 i596_add_cmd(dev, &lp->cf_cmd.cmd); 737 738 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name)); 739 memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6); 740 lp->sa_cmd.cmd.command = CmdSASetup; 741 i596_add_cmd(dev, &lp->sa_cmd.cmd); 742 743 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name)); 744 lp->tdr_cmd.cmd.command = CmdTDR; 745 i596_add_cmd(dev, &lp->tdr_cmd.cmd); 746 747 spin_lock_irqsave (&lp->lock, flags); 748 749 if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) { 750 spin_unlock_irqrestore (&lp->lock, flags); 751 goto failed; 752 } 753 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name)); 754 lp->scb.command = RX_START; 755 CA(dev); 756 757 spin_unlock_irqrestore (&lp->lock, flags); 758 759 if (wait_cmd(dev,lp,1000,"RX_START not processed")) 760 goto failed; 761 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name)); 762 return 0; 763 764 failed: 765 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name); 766 MPU_PORT(dev, PORT_RESET, NULL); 767 return -1; 768 } 769 770 static inline int i596_rx(struct net_device *dev) 771 { 772 struct i596_private *lp = dev->ml_priv; 773 struct i596_rfd *rfd; 774 struct i596_rbd *rbd; 775 int frames = 0; 776 777 DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n", 778 lp->rfd_head, lp->rbd_head)); 779 780 rfd = lp->rfd_head; /* Ref next frame to check */ 781 782 while ((rfd->stat) & STAT_C) { /* Loop while complete frames */ 783 if (rfd->rbd == I596_NULL) 784 rbd = I596_NULL; 785 else if (rfd->rbd == lp->rbd_head->b_addr) 786 rbd = lp->rbd_head; 787 else { 788 printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name); 789 /* XXX Now what? */ 790 rbd = I596_NULL; 791 } 792 DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n", 793 rfd, rfd->rbd, rfd->stat)); 794 795 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) { 796 /* a good frame */ 797 int pkt_len = rbd->count & 0x3fff; 798 struct sk_buff *skb = rbd->skb; 799 int rx_in_place = 0; 800 801 DEB(DEB_RXADDR,print_eth(rbd->v_data, "received")); 802 frames++; 803 804 /* Check if the packet is long enough to just accept 805 * without copying to a properly sized skbuff. 806 */ 807 808 if (pkt_len > rx_copybreak) { 809 struct sk_buff *newskb; 810 811 /* Get fresh skbuff to replace filled one. */ 812 newskb = netdev_alloc_skb(dev, PKT_BUF_SZ); 813 if (newskb == NULL) { 814 skb = NULL; /* drop pkt */ 815 goto memory_squeeze; 816 } 817 /* Pass up the skb already on the Rx ring. */ 818 skb_put(skb, pkt_len); 819 rx_in_place = 1; 820 rbd->skb = newskb; 821 rbd->v_data = newskb->data; 822 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data)); 823 #ifdef __mc68000__ 824 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ); 825 #endif 826 } 827 else 828 skb = netdev_alloc_skb(dev, pkt_len + 2); 829 memory_squeeze: 830 if (skb == NULL) { 831 /* XXX tulip.c can defer packets here!! */ 832 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name); 833 dev->stats.rx_dropped++; 834 } 835 else { 836 if (!rx_in_place) { 837 /* 16 byte align the data fields */ 838 skb_reserve(skb, 2); 839 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len); 840 } 841 skb->protocol=eth_type_trans(skb,dev); 842 skb->len = pkt_len; 843 #ifdef __mc68000__ 844 cache_clear(virt_to_phys(rbd->skb->data), 845 pkt_len); 846 #endif 847 netif_rx(skb); 848 dev->stats.rx_packets++; 849 dev->stats.rx_bytes+=pkt_len; 850 } 851 } 852 else { 853 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n", 854 dev->name, rfd->stat)); 855 dev->stats.rx_errors++; 856 if ((rfd->stat) & 0x0001) 857 dev->stats.collisions++; 858 if ((rfd->stat) & 0x0080) 859 dev->stats.rx_length_errors++; 860 if ((rfd->stat) & 0x0100) 861 dev->stats.rx_over_errors++; 862 if ((rfd->stat) & 0x0200) 863 dev->stats.rx_fifo_errors++; 864 if ((rfd->stat) & 0x0400) 865 dev->stats.rx_frame_errors++; 866 if ((rfd->stat) & 0x0800) 867 dev->stats.rx_crc_errors++; 868 if ((rfd->stat) & 0x1000) 869 dev->stats.rx_length_errors++; 870 } 871 872 /* Clear the buffer descriptor count and EOF + F flags */ 873 874 if (rbd != I596_NULL && (rbd->count & 0x4000)) { 875 rbd->count = 0; 876 lp->rbd_head = rbd->v_next; 877 } 878 879 /* Tidy the frame descriptor, marking it as end of list */ 880 881 rfd->rbd = I596_NULL; 882 rfd->stat = 0; 883 rfd->cmd = CMD_EOL|CMD_FLEX; 884 rfd->count = 0; 885 886 /* Remove end-of-list from old end descriptor */ 887 888 rfd->v_prev->cmd = CMD_FLEX; 889 890 /* Update record of next frame descriptor to process */ 891 892 lp->scb.rfd = rfd->b_next; 893 lp->rfd_head = rfd->v_next; 894 rfd = lp->rfd_head; 895 } 896 897 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames)); 898 899 return 0; 900 } 901 902 903 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) 904 { 905 struct i596_cmd *ptr; 906 907 while (lp->cmd_head != I596_NULL) { 908 ptr = lp->cmd_head; 909 lp->cmd_head = ptr->v_next; 910 lp->cmd_backlog--; 911 912 switch ((ptr->command) & 0x7) { 913 case CmdTx: 914 { 915 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; 916 struct sk_buff *skb = tx_cmd->skb; 917 918 dev_kfree_skb(skb); 919 920 dev->stats.tx_errors++; 921 dev->stats.tx_aborted_errors++; 922 923 ptr->v_next = ptr->b_next = I596_NULL; 924 tx_cmd->cmd.command = 0; /* Mark as free */ 925 break; 926 } 927 default: 928 ptr->v_next = ptr->b_next = I596_NULL; 929 } 930 } 931 932 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out"); 933 lp->scb.cmd = I596_NULL; 934 } 935 936 static void i596_reset(struct net_device *dev, struct i596_private *lp, 937 int ioaddr) 938 { 939 unsigned long flags; 940 941 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n")); 942 943 spin_lock_irqsave (&lp->lock, flags); 944 945 wait_cmd(dev,lp,100,"i596_reset timed out"); 946 947 netif_stop_queue(dev); 948 949 lp->scb.command = CUC_ABORT | RX_ABORT; 950 CA(dev); 951 952 /* wait for shutdown */ 953 wait_cmd(dev,lp,1000,"i596_reset 2 timed out"); 954 spin_unlock_irqrestore (&lp->lock, flags); 955 956 i596_cleanup_cmd(dev,lp); 957 i596_rx(dev); 958 959 netif_start_queue(dev); 960 init_i596_mem(dev); 961 } 962 963 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) 964 { 965 struct i596_private *lp = dev->ml_priv; 966 int ioaddr = dev->base_addr; 967 unsigned long flags; 968 969 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n")); 970 971 cmd->status = 0; 972 cmd->command |= (CMD_EOL | CMD_INTR); 973 cmd->v_next = cmd->b_next = I596_NULL; 974 975 spin_lock_irqsave (&lp->lock, flags); 976 977 if (lp->cmd_head != I596_NULL) { 978 lp->cmd_tail->v_next = cmd; 979 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status)); 980 } else { 981 lp->cmd_head = cmd; 982 wait_cmd(dev,lp,100,"i596_add_cmd timed out"); 983 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status)); 984 lp->scb.command = CUC_START; 985 CA(dev); 986 } 987 lp->cmd_tail = cmd; 988 lp->cmd_backlog++; 989 990 spin_unlock_irqrestore (&lp->lock, flags); 991 992 if (lp->cmd_backlog > max_cmd_backlog) { 993 unsigned long tickssofar = jiffies - lp->last_cmd; 994 995 if (tickssofar < ticks_limit) 996 return; 997 998 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name); 999 1000 i596_reset(dev, lp, ioaddr); 1001 } 1002 } 1003 1004 static int i596_open(struct net_device *dev) 1005 { 1006 int res = 0; 1007 1008 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq)); 1009 1010 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) { 1011 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq); 1012 return -EAGAIN; 1013 } 1014 #ifdef ENABLE_MVME16x_NET 1015 if (MACH_IS_MVME16x) { 1016 if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) { 1017 res = -EAGAIN; 1018 goto err_irq_dev; 1019 } 1020 } 1021 #endif 1022 res = init_rx_bufs(dev); 1023 if (res) 1024 goto err_irq_56; 1025 1026 netif_start_queue(dev); 1027 1028 if (init_i596_mem(dev)) { 1029 res = -EAGAIN; 1030 goto err_queue; 1031 } 1032 1033 return 0; 1034 1035 err_queue: 1036 netif_stop_queue(dev); 1037 remove_rx_bufs(dev); 1038 err_irq_56: 1039 #ifdef ENABLE_MVME16x_NET 1040 free_irq(0x56, dev); 1041 err_irq_dev: 1042 #endif 1043 free_irq(dev->irq, dev); 1044 1045 return res; 1046 } 1047 1048 static void i596_tx_timeout (struct net_device *dev) 1049 { 1050 struct i596_private *lp = dev->ml_priv; 1051 int ioaddr = dev->base_addr; 1052 1053 /* Transmitter timeout, serious problems. */ 1054 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n", 1055 dev->name)); 1056 1057 dev->stats.tx_errors++; 1058 1059 /* Try to restart the adaptor */ 1060 if (lp->last_restart == dev->stats.tx_packets) { 1061 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n")); 1062 /* Shutdown and restart */ 1063 i596_reset (dev, lp, ioaddr); 1064 } else { 1065 /* Issue a channel attention signal */ 1066 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n")); 1067 lp->scb.command = CUC_START | RX_START; 1068 CA (dev); 1069 lp->last_restart = dev->stats.tx_packets; 1070 } 1071 1072 dev->trans_start = jiffies; /* prevent tx timeout */ 1073 netif_wake_queue (dev); 1074 } 1075 1076 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev) 1077 { 1078 struct i596_private *lp = dev->ml_priv; 1079 struct tx_cmd *tx_cmd; 1080 struct i596_tbd *tbd; 1081 short length = skb->len; 1082 1083 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n", 1084 dev->name, skb->len, skb->data)); 1085 1086 if (skb->len < ETH_ZLEN) { 1087 if (skb_padto(skb, ETH_ZLEN)) 1088 return NETDEV_TX_OK; 1089 length = ETH_ZLEN; 1090 } 1091 netif_stop_queue(dev); 1092 1093 tx_cmd = lp->tx_cmds + lp->next_tx_cmd; 1094 tbd = lp->tbds + lp->next_tx_cmd; 1095 1096 if (tx_cmd->cmd.command) { 1097 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n", 1098 dev->name); 1099 dev->stats.tx_dropped++; 1100 1101 dev_kfree_skb(skb); 1102 } else { 1103 if (++lp->next_tx_cmd == TX_RING_SIZE) 1104 lp->next_tx_cmd = 0; 1105 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd)); 1106 tbd->next = I596_NULL; 1107 1108 tx_cmd->cmd.command = CMD_FLEX | CmdTx; 1109 tx_cmd->skb = skb; 1110 1111 tx_cmd->pad = 0; 1112 tx_cmd->size = 0; 1113 tbd->pad = 0; 1114 tbd->size = EOF | length; 1115 1116 tbd->data = WSWAPchar(virt_to_bus(skb->data)); 1117 1118 #ifdef __mc68000__ 1119 cache_push(virt_to_phys(skb->data), length); 1120 #endif 1121 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued")); 1122 i596_add_cmd(dev, &tx_cmd->cmd); 1123 1124 dev->stats.tx_packets++; 1125 dev->stats.tx_bytes += length; 1126 } 1127 1128 netif_start_queue(dev); 1129 1130 return NETDEV_TX_OK; 1131 } 1132 1133 static void print_eth(unsigned char *add, char *str) 1134 { 1135 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n", 1136 add, add + 6, add, add[12], add[13], str); 1137 } 1138 1139 static int io = 0x300; 1140 static int irq = 10; 1141 1142 static const struct net_device_ops i596_netdev_ops = { 1143 .ndo_open = i596_open, 1144 .ndo_stop = i596_close, 1145 .ndo_start_xmit = i596_start_xmit, 1146 .ndo_set_rx_mode = set_multicast_list, 1147 .ndo_tx_timeout = i596_tx_timeout, 1148 .ndo_change_mtu = eth_change_mtu, 1149 .ndo_set_mac_address = eth_mac_addr, 1150 .ndo_validate_addr = eth_validate_addr, 1151 }; 1152 1153 struct net_device * __init i82596_probe(int unit) 1154 { 1155 struct net_device *dev; 1156 int i; 1157 struct i596_private *lp; 1158 char eth_addr[8]; 1159 static int probed; 1160 int err; 1161 1162 if (probed) 1163 return ERR_PTR(-ENODEV); 1164 probed++; 1165 1166 dev = alloc_etherdev(0); 1167 if (!dev) 1168 return ERR_PTR(-ENOMEM); 1169 1170 if (unit >= 0) { 1171 sprintf(dev->name, "eth%d", unit); 1172 netdev_boot_setup_check(dev); 1173 } else { 1174 dev->base_addr = io; 1175 dev->irq = irq; 1176 } 1177 1178 #ifdef ENABLE_MVME16x_NET 1179 if (MACH_IS_MVME16x) { 1180 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) { 1181 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n"); 1182 err = -ENODEV; 1183 goto out; 1184 } 1185 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */ 1186 dev->base_addr = MVME_I596_BASE; 1187 dev->irq = (unsigned) MVME16x_IRQ_I596; 1188 goto found; 1189 } 1190 #endif 1191 #ifdef ENABLE_BVME6000_NET 1192 if (MACH_IS_BVME6000) { 1193 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE; 1194 unsigned char msr = rtc[3]; 1195 int i; 1196 1197 rtc[3] |= 0x80; 1198 for (i = 0; i < 6; i++) 1199 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */ 1200 rtc[3] = msr; 1201 dev->base_addr = BVME_I596_BASE; 1202 dev->irq = (unsigned) BVME_IRQ_I596; 1203 goto found; 1204 } 1205 #endif 1206 #ifdef ENABLE_APRICOT 1207 { 1208 int checksum = 0; 1209 int ioaddr = 0x300; 1210 1211 /* this is easy the ethernet interface can only be at 0x300 */ 1212 /* first check nothing is already registered here */ 1213 1214 if (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) { 1215 printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr); 1216 err = -EBUSY; 1217 goto out; 1218 } 1219 1220 dev->base_addr = ioaddr; 1221 1222 for (i = 0; i < 8; i++) { 1223 eth_addr[i] = inb(ioaddr + 8 + i); 1224 checksum += eth_addr[i]; 1225 } 1226 1227 /* checksum is a multiple of 0x100, got this wrong first time 1228 some machines have 0x100, some 0x200. The DOS driver doesn't 1229 even bother with the checksum. 1230 Some other boards trip the checksum.. but then appear as 1231 ether address 0. Trap these - AC */ 1232 1233 if ((checksum % 0x100) || 1234 (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) { 1235 err = -ENODEV; 1236 goto out1; 1237 } 1238 1239 dev->irq = 10; 1240 goto found; 1241 } 1242 #endif 1243 err = -ENODEV; 1244 goto out; 1245 1246 found: 1247 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0); 1248 if (!dev->mem_start) { 1249 err = -ENOMEM; 1250 goto out1; 1251 } 1252 1253 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr)); 1254 1255 for (i = 0; i < 6; i++) 1256 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i])); 1257 1258 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq)); 1259 1260 DEB(DEB_PROBE,printk(KERN_INFO "%s", version)); 1261 1262 /* The 82596-specific entries in the device structure. */ 1263 dev->netdev_ops = &i596_netdev_ops; 1264 dev->watchdog_timeo = TX_TIMEOUT; 1265 1266 dev->ml_priv = (void *)(dev->mem_start); 1267 1268 lp = dev->ml_priv; 1269 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), " 1270 "lp->scb at 0x%08lx\n", 1271 dev->name, (unsigned long)lp, 1272 sizeof(struct i596_private), (unsigned long)&lp->scb)); 1273 memset((void *) lp, 0, sizeof(struct i596_private)); 1274 1275 #ifdef __mc68000__ 1276 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096); 1277 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096); 1278 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER); 1279 #endif 1280 lp->scb.command = 0; 1281 lp->scb.cmd = I596_NULL; 1282 lp->scb.rfd = I596_NULL; 1283 spin_lock_init(&lp->lock); 1284 1285 err = register_netdev(dev); 1286 if (err) 1287 goto out2; 1288 return dev; 1289 out2: 1290 #ifdef __mc68000__ 1291 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, 1292 * XXX which may be invalid (CONFIG_060_WRITETHROUGH) 1293 */ 1294 kernel_set_cachemode((void *)(dev->mem_start), 4096, 1295 IOMAP_FULL_CACHING); 1296 #endif 1297 free_page ((u32)(dev->mem_start)); 1298 out1: 1299 #ifdef ENABLE_APRICOT 1300 release_region(dev->base_addr, I596_TOTAL_SIZE); 1301 #endif 1302 out: 1303 free_netdev(dev); 1304 return ERR_PTR(err); 1305 } 1306 1307 static irqreturn_t i596_interrupt(int irq, void *dev_id) 1308 { 1309 struct net_device *dev = dev_id; 1310 struct i596_private *lp; 1311 short ioaddr; 1312 unsigned short status, ack_cmd = 0; 1313 int handled = 0; 1314 1315 #ifdef ENABLE_BVME6000_NET 1316 if (MACH_IS_BVME6000) { 1317 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) { 1318 i596_error(irq, dev_id); 1319 return IRQ_HANDLED; 1320 } 1321 } 1322 #endif 1323 if (dev == NULL) { 1324 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq); 1325 return IRQ_NONE; 1326 } 1327 1328 ioaddr = dev->base_addr; 1329 lp = dev->ml_priv; 1330 1331 spin_lock (&lp->lock); 1332 1333 wait_cmd(dev,lp,100,"i596 interrupt, timeout"); 1334 status = lp->scb.status; 1335 1336 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n", 1337 dev->name, irq, status)); 1338 1339 ack_cmd = status & 0xf000; 1340 1341 if ((status & 0x8000) || (status & 0x2000)) { 1342 struct i596_cmd *ptr; 1343 1344 handled = 1; 1345 if ((status & 0x8000)) 1346 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name)); 1347 if ((status & 0x2000)) 1348 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700)); 1349 1350 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) { 1351 ptr = lp->cmd_head; 1352 1353 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n", 1354 lp->cmd_head->status, lp->cmd_head->command)); 1355 lp->cmd_head = ptr->v_next; 1356 lp->cmd_backlog--; 1357 1358 switch ((ptr->command) & 0x7) { 1359 case CmdTx: 1360 { 1361 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; 1362 struct sk_buff *skb = tx_cmd->skb; 1363 1364 if ((ptr->status) & STAT_OK) { 1365 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done")); 1366 } else { 1367 dev->stats.tx_errors++; 1368 if ((ptr->status) & 0x0020) 1369 dev->stats.collisions++; 1370 if (!((ptr->status) & 0x0040)) 1371 dev->stats.tx_heartbeat_errors++; 1372 if ((ptr->status) & 0x0400) 1373 dev->stats.tx_carrier_errors++; 1374 if ((ptr->status) & 0x0800) 1375 dev->stats.collisions++; 1376 if ((ptr->status) & 0x1000) 1377 dev->stats.tx_aborted_errors++; 1378 } 1379 1380 dev_kfree_skb_irq(skb); 1381 1382 tx_cmd->cmd.command = 0; /* Mark free */ 1383 break; 1384 } 1385 case CmdTDR: 1386 { 1387 unsigned short status = ((struct tdr_cmd *)ptr)->status; 1388 1389 if (status & 0x8000) { 1390 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name)); 1391 } else { 1392 if (status & 0x4000) 1393 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name); 1394 if (status & 0x2000) 1395 printk(KERN_ERR "%s: Termination problem.\n", dev->name); 1396 if (status & 0x1000) 1397 printk(KERN_ERR "%s: Short circuit.\n", dev->name); 1398 1399 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff)); 1400 } 1401 break; 1402 } 1403 case CmdConfigure: 1404 case CmdMulticastList: 1405 /* Zap command so set_multicast_list() knows it is free */ 1406 ptr->command = 0; 1407 break; 1408 } 1409 ptr->v_next = ptr->b_next = I596_NULL; 1410 lp->last_cmd = jiffies; 1411 } 1412 1413 ptr = lp->cmd_head; 1414 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) { 1415 ptr->command &= 0x1fff; 1416 ptr = ptr->v_next; 1417 } 1418 1419 if ((lp->cmd_head != I596_NULL)) 1420 ack_cmd |= CUC_START; 1421 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status)); 1422 } 1423 if ((status & 0x1000) || (status & 0x4000)) { 1424 if ((status & 0x4000)) 1425 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name)); 1426 i596_rx(dev); 1427 /* Only RX_START if stopped - RGH 07-07-96 */ 1428 if (status & 0x1000) { 1429 if (netif_running(dev)) { 1430 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status)); 1431 ack_cmd |= RX_START; 1432 dev->stats.rx_errors++; 1433 dev->stats.rx_fifo_errors++; 1434 rebuild_rx_bufs(dev); 1435 } 1436 } 1437 } 1438 wait_cmd(dev,lp,100,"i596 interrupt, timeout"); 1439 lp->scb.command = ack_cmd; 1440 1441 #ifdef ENABLE_MVME16x_NET 1442 if (MACH_IS_MVME16x) { 1443 /* Ack the interrupt */ 1444 1445 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; 1446 1447 pcc2[0x2a] |= 0x08; 1448 } 1449 #endif 1450 #ifdef ENABLE_BVME6000_NET 1451 if (MACH_IS_BVME6000) { 1452 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; 1453 1454 *ethirq = 1; 1455 *ethirq = 3; 1456 } 1457 #endif 1458 #ifdef ENABLE_APRICOT 1459 (void) inb(ioaddr + 0x10); 1460 outb(4, ioaddr + 0xf); 1461 #endif 1462 CA(dev); 1463 1464 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); 1465 1466 spin_unlock (&lp->lock); 1467 return IRQ_RETVAL(handled); 1468 } 1469 1470 static int i596_close(struct net_device *dev) 1471 { 1472 struct i596_private *lp = dev->ml_priv; 1473 unsigned long flags; 1474 1475 netif_stop_queue(dev); 1476 1477 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n", 1478 dev->name, lp->scb.status)); 1479 1480 spin_lock_irqsave(&lp->lock, flags); 1481 1482 wait_cmd(dev,lp,100,"close1 timed out"); 1483 lp->scb.command = CUC_ABORT | RX_ABORT; 1484 CA(dev); 1485 1486 wait_cmd(dev,lp,100,"close2 timed out"); 1487 1488 spin_unlock_irqrestore(&lp->lock, flags); 1489 DEB(DEB_STRUCT,i596_display_data(dev)); 1490 i596_cleanup_cmd(dev,lp); 1491 1492 #ifdef ENABLE_MVME16x_NET 1493 if (MACH_IS_MVME16x) { 1494 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; 1495 1496 /* Disable all ints */ 1497 pcc2[0x28] = 1; 1498 pcc2[0x2a] = 0x40; 1499 pcc2[0x2b] = 0x40; /* Set snooping bits now! */ 1500 } 1501 #endif 1502 #ifdef ENABLE_BVME6000_NET 1503 if (MACH_IS_BVME6000) { 1504 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; 1505 1506 *ethirq = 1; 1507 } 1508 #endif 1509 1510 #ifdef ENABLE_MVME16x_NET 1511 free_irq(0x56, dev); 1512 #endif 1513 free_irq(dev->irq, dev); 1514 remove_rx_bufs(dev); 1515 1516 return 0; 1517 } 1518 1519 /* 1520 * Set or clear the multicast filter for this adaptor. 1521 */ 1522 1523 static void set_multicast_list(struct net_device *dev) 1524 { 1525 struct i596_private *lp = dev->ml_priv; 1526 int config = 0, cnt; 1527 1528 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n", 1529 dev->name, netdev_mc_count(dev), 1530 dev->flags & IFF_PROMISC ? "ON" : "OFF", 1531 dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); 1532 1533 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out")) 1534 return; 1535 1536 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) { 1537 lp->cf_cmd.i596_config[8] |= 0x01; 1538 config = 1; 1539 } 1540 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) { 1541 lp->cf_cmd.i596_config[8] &= ~0x01; 1542 config = 1; 1543 } 1544 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) { 1545 lp->cf_cmd.i596_config[11] &= ~0x20; 1546 config = 1; 1547 } 1548 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) { 1549 lp->cf_cmd.i596_config[11] |= 0x20; 1550 config = 1; 1551 } 1552 if (config) { 1553 lp->cf_cmd.cmd.command = CmdConfigure; 1554 i596_add_cmd(dev, &lp->cf_cmd.cmd); 1555 } 1556 1557 cnt = netdev_mc_count(dev); 1558 if (cnt > MAX_MC_CNT) 1559 { 1560 cnt = MAX_MC_CNT; 1561 printk(KERN_ERR "%s: Only %d multicast addresses supported", 1562 dev->name, cnt); 1563 } 1564 1565 if (!netdev_mc_empty(dev)) { 1566 struct netdev_hw_addr *ha; 1567 unsigned char *cp; 1568 struct mc_cmd *cmd; 1569 1570 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out")) 1571 return; 1572 cmd = &lp->mc_cmd; 1573 cmd->cmd.command = CmdMulticastList; 1574 cmd->mc_cnt = cnt * ETH_ALEN; 1575 cp = cmd->mc_addrs; 1576 netdev_for_each_mc_addr(ha, dev) { 1577 if (!cnt--) 1578 break; 1579 memcpy(cp, ha->addr, ETH_ALEN); 1580 if (i596_debug > 1) 1581 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n", 1582 dev->name, cp)); 1583 cp += ETH_ALEN; 1584 } 1585 i596_add_cmd(dev, &cmd->cmd); 1586 } 1587 } 1588 1589 #ifdef MODULE 1590 static struct net_device *dev_82596; 1591 1592 #ifdef ENABLE_APRICOT 1593 module_param(irq, int, 0); 1594 MODULE_PARM_DESC(irq, "Apricot IRQ number"); 1595 #endif 1596 1597 static int debug = -1; 1598 module_param(debug, int, 0); 1599 MODULE_PARM_DESC(debug, "i82596 debug mask"); 1600 1601 int __init init_module(void) 1602 { 1603 if (debug >= 0) 1604 i596_debug = debug; 1605 dev_82596 = i82596_probe(-1); 1606 if (IS_ERR(dev_82596)) 1607 return PTR_ERR(dev_82596); 1608 return 0; 1609 } 1610 1611 void __exit cleanup_module(void) 1612 { 1613 unregister_netdev(dev_82596); 1614 #ifdef __mc68000__ 1615 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, 1616 * XXX which may be invalid (CONFIG_060_WRITETHROUGH) 1617 */ 1618 1619 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096, 1620 IOMAP_FULL_CACHING); 1621 #endif 1622 free_page ((u32)(dev_82596->mem_start)); 1623 #ifdef ENABLE_APRICOT 1624 /* If we don't do this, we can't re-insmod it later. */ 1625 release_region(dev_82596->base_addr, I596_TOTAL_SIZE); 1626 #endif 1627 free_netdev(dev_82596); 1628 } 1629 1630 #endif /* MODULE */ 1631