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