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 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, 6); 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 } 802 else 803 skb = netdev_alloc_skb(dev, pkt_len + 2); 804 memory_squeeze: 805 if (skb == NULL) { 806 /* XXX tulip.c can defer packets here!! */ 807 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name); 808 dev->stats.rx_dropped++; 809 } 810 else { 811 if (!rx_in_place) { 812 /* 16 byte align the data fields */ 813 skb_reserve(skb, 2); 814 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len); 815 } 816 skb->protocol=eth_type_trans(skb,dev); 817 skb->len = pkt_len; 818 #ifdef __mc68000__ 819 cache_clear(virt_to_phys(rbd->skb->data), 820 pkt_len); 821 #endif 822 netif_rx(skb); 823 dev->stats.rx_packets++; 824 dev->stats.rx_bytes+=pkt_len; 825 } 826 } 827 else { 828 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n", 829 dev->name, rfd->stat)); 830 dev->stats.rx_errors++; 831 if ((rfd->stat) & 0x0001) 832 dev->stats.collisions++; 833 if ((rfd->stat) & 0x0080) 834 dev->stats.rx_length_errors++; 835 if ((rfd->stat) & 0x0100) 836 dev->stats.rx_over_errors++; 837 if ((rfd->stat) & 0x0200) 838 dev->stats.rx_fifo_errors++; 839 if ((rfd->stat) & 0x0400) 840 dev->stats.rx_frame_errors++; 841 if ((rfd->stat) & 0x0800) 842 dev->stats.rx_crc_errors++; 843 if ((rfd->stat) & 0x1000) 844 dev->stats.rx_length_errors++; 845 } 846 847 /* Clear the buffer descriptor count and EOF + F flags */ 848 849 if (rbd != I596_NULL && (rbd->count & 0x4000)) { 850 rbd->count = 0; 851 lp->rbd_head = rbd->v_next; 852 } 853 854 /* Tidy the frame descriptor, marking it as end of list */ 855 856 rfd->rbd = I596_NULL; 857 rfd->stat = 0; 858 rfd->cmd = CMD_EOL|CMD_FLEX; 859 rfd->count = 0; 860 861 /* Remove end-of-list from old end descriptor */ 862 863 rfd->v_prev->cmd = CMD_FLEX; 864 865 /* Update record of next frame descriptor to process */ 866 867 lp->scb.rfd = rfd->b_next; 868 lp->rfd_head = rfd->v_next; 869 rfd = lp->rfd_head; 870 } 871 872 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames)); 873 874 return 0; 875 } 876 877 878 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) 879 { 880 struct i596_cmd *ptr; 881 882 while (lp->cmd_head != I596_NULL) { 883 ptr = lp->cmd_head; 884 lp->cmd_head = ptr->v_next; 885 lp->cmd_backlog--; 886 887 switch ((ptr->command) & 0x7) { 888 case CmdTx: 889 { 890 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; 891 struct sk_buff *skb = tx_cmd->skb; 892 893 dev_kfree_skb(skb); 894 895 dev->stats.tx_errors++; 896 dev->stats.tx_aborted_errors++; 897 898 ptr->v_next = ptr->b_next = I596_NULL; 899 tx_cmd->cmd.command = 0; /* Mark as free */ 900 break; 901 } 902 default: 903 ptr->v_next = ptr->b_next = I596_NULL; 904 } 905 } 906 907 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out"); 908 lp->scb.cmd = I596_NULL; 909 } 910 911 static void i596_reset(struct net_device *dev, struct i596_private *lp, 912 int ioaddr) 913 { 914 unsigned long flags; 915 916 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n")); 917 918 spin_lock_irqsave (&lp->lock, flags); 919 920 wait_cmd(dev,lp,100,"i596_reset timed out"); 921 922 netif_stop_queue(dev); 923 924 lp->scb.command = CUC_ABORT | RX_ABORT; 925 CA(dev); 926 927 /* wait for shutdown */ 928 wait_cmd(dev,lp,1000,"i596_reset 2 timed out"); 929 spin_unlock_irqrestore (&lp->lock, flags); 930 931 i596_cleanup_cmd(dev,lp); 932 i596_rx(dev); 933 934 netif_start_queue(dev); 935 init_i596_mem(dev); 936 } 937 938 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) 939 { 940 struct i596_private *lp = dev->ml_priv; 941 int ioaddr = dev->base_addr; 942 unsigned long flags; 943 944 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n")); 945 946 cmd->status = 0; 947 cmd->command |= (CMD_EOL | CMD_INTR); 948 cmd->v_next = cmd->b_next = I596_NULL; 949 950 spin_lock_irqsave (&lp->lock, flags); 951 952 if (lp->cmd_head != I596_NULL) { 953 lp->cmd_tail->v_next = cmd; 954 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status)); 955 } else { 956 lp->cmd_head = cmd; 957 wait_cmd(dev,lp,100,"i596_add_cmd timed out"); 958 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status)); 959 lp->scb.command = CUC_START; 960 CA(dev); 961 } 962 lp->cmd_tail = cmd; 963 lp->cmd_backlog++; 964 965 spin_unlock_irqrestore (&lp->lock, flags); 966 967 if (lp->cmd_backlog > max_cmd_backlog) { 968 unsigned long tickssofar = jiffies - lp->last_cmd; 969 970 if (tickssofar < ticks_limit) 971 return; 972 973 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name); 974 975 i596_reset(dev, lp, ioaddr); 976 } 977 } 978 979 static int i596_open(struct net_device *dev) 980 { 981 int res = 0; 982 983 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq)); 984 985 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) { 986 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq); 987 return -EAGAIN; 988 } 989 #ifdef ENABLE_MVME16x_NET 990 if (MACH_IS_MVME16x) { 991 if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) { 992 res = -EAGAIN; 993 goto err_irq_dev; 994 } 995 } 996 #endif 997 res = init_rx_bufs(dev); 998 if (res) 999 goto err_irq_56; 1000 1001 netif_start_queue(dev); 1002 1003 if (init_i596_mem(dev)) { 1004 res = -EAGAIN; 1005 goto err_queue; 1006 } 1007 1008 return 0; 1009 1010 err_queue: 1011 netif_stop_queue(dev); 1012 remove_rx_bufs(dev); 1013 err_irq_56: 1014 #ifdef ENABLE_MVME16x_NET 1015 free_irq(0x56, dev); 1016 err_irq_dev: 1017 #endif 1018 free_irq(dev->irq, dev); 1019 1020 return res; 1021 } 1022 1023 static void i596_tx_timeout (struct net_device *dev) 1024 { 1025 struct i596_private *lp = dev->ml_priv; 1026 int ioaddr = dev->base_addr; 1027 1028 /* Transmitter timeout, serious problems. */ 1029 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n", 1030 dev->name)); 1031 1032 dev->stats.tx_errors++; 1033 1034 /* Try to restart the adaptor */ 1035 if (lp->last_restart == dev->stats.tx_packets) { 1036 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n")); 1037 /* Shutdown and restart */ 1038 i596_reset (dev, lp, ioaddr); 1039 } else { 1040 /* Issue a channel attention signal */ 1041 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n")); 1042 lp->scb.command = CUC_START | RX_START; 1043 CA (dev); 1044 lp->last_restart = dev->stats.tx_packets; 1045 } 1046 1047 dev->trans_start = jiffies; /* prevent tx timeout */ 1048 netif_wake_queue (dev); 1049 } 1050 1051 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev) 1052 { 1053 struct i596_private *lp = dev->ml_priv; 1054 struct tx_cmd *tx_cmd; 1055 struct i596_tbd *tbd; 1056 short length = skb->len; 1057 1058 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n", 1059 dev->name, skb->len, skb->data)); 1060 1061 if (skb->len < ETH_ZLEN) { 1062 if (skb_padto(skb, ETH_ZLEN)) 1063 return NETDEV_TX_OK; 1064 length = ETH_ZLEN; 1065 } 1066 netif_stop_queue(dev); 1067 1068 tx_cmd = lp->tx_cmds + lp->next_tx_cmd; 1069 tbd = lp->tbds + lp->next_tx_cmd; 1070 1071 if (tx_cmd->cmd.command) { 1072 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n", 1073 dev->name); 1074 dev->stats.tx_dropped++; 1075 1076 dev_kfree_skb(skb); 1077 } else { 1078 if (++lp->next_tx_cmd == TX_RING_SIZE) 1079 lp->next_tx_cmd = 0; 1080 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd)); 1081 tbd->next = I596_NULL; 1082 1083 tx_cmd->cmd.command = CMD_FLEX | CmdTx; 1084 tx_cmd->skb = skb; 1085 1086 tx_cmd->pad = 0; 1087 tx_cmd->size = 0; 1088 tbd->pad = 0; 1089 tbd->size = EOF | length; 1090 1091 tbd->data = WSWAPchar(virt_to_bus(skb->data)); 1092 1093 #ifdef __mc68000__ 1094 cache_push(virt_to_phys(skb->data), length); 1095 #endif 1096 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued")); 1097 i596_add_cmd(dev, &tx_cmd->cmd); 1098 1099 dev->stats.tx_packets++; 1100 dev->stats.tx_bytes += length; 1101 } 1102 1103 netif_start_queue(dev); 1104 1105 return NETDEV_TX_OK; 1106 } 1107 1108 static void print_eth(unsigned char *add, char *str) 1109 { 1110 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n", 1111 add, add + 6, add, add[12], add[13], str); 1112 } 1113 1114 static int io = 0x300; 1115 static int irq = 10; 1116 1117 static const struct net_device_ops i596_netdev_ops = { 1118 .ndo_open = i596_open, 1119 .ndo_stop = i596_close, 1120 .ndo_start_xmit = i596_start_xmit, 1121 .ndo_set_rx_mode = set_multicast_list, 1122 .ndo_tx_timeout = i596_tx_timeout, 1123 .ndo_change_mtu = eth_change_mtu, 1124 .ndo_set_mac_address = eth_mac_addr, 1125 .ndo_validate_addr = eth_validate_addr, 1126 }; 1127 1128 struct net_device * __init i82596_probe(int unit) 1129 { 1130 struct net_device *dev; 1131 int i; 1132 struct i596_private *lp; 1133 char eth_addr[8]; 1134 static int probed; 1135 int err; 1136 1137 if (probed) 1138 return ERR_PTR(-ENODEV); 1139 probed++; 1140 1141 dev = alloc_etherdev(0); 1142 if (!dev) 1143 return ERR_PTR(-ENOMEM); 1144 1145 if (unit >= 0) { 1146 sprintf(dev->name, "eth%d", unit); 1147 netdev_boot_setup_check(dev); 1148 } else { 1149 dev->base_addr = io; 1150 dev->irq = irq; 1151 } 1152 1153 #ifdef ENABLE_MVME16x_NET 1154 if (MACH_IS_MVME16x) { 1155 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) { 1156 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n"); 1157 err = -ENODEV; 1158 goto out; 1159 } 1160 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */ 1161 dev->base_addr = MVME_I596_BASE; 1162 dev->irq = (unsigned) MVME16x_IRQ_I596; 1163 goto found; 1164 } 1165 #endif 1166 #ifdef ENABLE_BVME6000_NET 1167 if (MACH_IS_BVME6000) { 1168 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE; 1169 unsigned char msr = rtc[3]; 1170 int i; 1171 1172 rtc[3] |= 0x80; 1173 for (i = 0; i < 6; i++) 1174 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */ 1175 rtc[3] = msr; 1176 dev->base_addr = BVME_I596_BASE; 1177 dev->irq = (unsigned) BVME_IRQ_I596; 1178 goto found; 1179 } 1180 #endif 1181 err = -ENODEV; 1182 goto out; 1183 1184 found: 1185 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0); 1186 if (!dev->mem_start) { 1187 err = -ENOMEM; 1188 goto out1; 1189 } 1190 1191 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr)); 1192 1193 for (i = 0; i < 6; i++) 1194 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i])); 1195 1196 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq)); 1197 1198 DEB(DEB_PROBE,printk(KERN_INFO "%s", version)); 1199 1200 /* The 82596-specific entries in the device structure. */ 1201 dev->netdev_ops = &i596_netdev_ops; 1202 dev->watchdog_timeo = TX_TIMEOUT; 1203 1204 dev->ml_priv = (void *)(dev->mem_start); 1205 1206 lp = dev->ml_priv; 1207 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), " 1208 "lp->scb at 0x%08lx\n", 1209 dev->name, (unsigned long)lp, 1210 sizeof(struct i596_private), (unsigned long)&lp->scb)); 1211 memset((void *) lp, 0, sizeof(struct i596_private)); 1212 1213 #ifdef __mc68000__ 1214 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096); 1215 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096); 1216 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER); 1217 #endif 1218 lp->scb.command = 0; 1219 lp->scb.cmd = I596_NULL; 1220 lp->scb.rfd = I596_NULL; 1221 spin_lock_init(&lp->lock); 1222 1223 err = register_netdev(dev); 1224 if (err) 1225 goto out2; 1226 return dev; 1227 out2: 1228 #ifdef __mc68000__ 1229 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, 1230 * XXX which may be invalid (CONFIG_060_WRITETHROUGH) 1231 */ 1232 kernel_set_cachemode((void *)(dev->mem_start), 4096, 1233 IOMAP_FULL_CACHING); 1234 #endif 1235 free_page ((u32)(dev->mem_start)); 1236 out1: 1237 out: 1238 free_netdev(dev); 1239 return ERR_PTR(err); 1240 } 1241 1242 static irqreturn_t i596_interrupt(int irq, void *dev_id) 1243 { 1244 struct net_device *dev = dev_id; 1245 struct i596_private *lp; 1246 short ioaddr; 1247 unsigned short status, ack_cmd = 0; 1248 int handled = 0; 1249 1250 #ifdef ENABLE_BVME6000_NET 1251 if (MACH_IS_BVME6000) { 1252 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) { 1253 i596_error(irq, dev_id); 1254 return IRQ_HANDLED; 1255 } 1256 } 1257 #endif 1258 if (dev == NULL) { 1259 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq); 1260 return IRQ_NONE; 1261 } 1262 1263 ioaddr = dev->base_addr; 1264 lp = dev->ml_priv; 1265 1266 spin_lock (&lp->lock); 1267 1268 wait_cmd(dev,lp,100,"i596 interrupt, timeout"); 1269 status = lp->scb.status; 1270 1271 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n", 1272 dev->name, irq, status)); 1273 1274 ack_cmd = status & 0xf000; 1275 1276 if ((status & 0x8000) || (status & 0x2000)) { 1277 struct i596_cmd *ptr; 1278 1279 handled = 1; 1280 if ((status & 0x8000)) 1281 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name)); 1282 if ((status & 0x2000)) 1283 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700)); 1284 1285 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) { 1286 ptr = lp->cmd_head; 1287 1288 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n", 1289 lp->cmd_head->status, lp->cmd_head->command)); 1290 lp->cmd_head = ptr->v_next; 1291 lp->cmd_backlog--; 1292 1293 switch ((ptr->command) & 0x7) { 1294 case CmdTx: 1295 { 1296 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; 1297 struct sk_buff *skb = tx_cmd->skb; 1298 1299 if ((ptr->status) & STAT_OK) { 1300 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done")); 1301 } else { 1302 dev->stats.tx_errors++; 1303 if ((ptr->status) & 0x0020) 1304 dev->stats.collisions++; 1305 if (!((ptr->status) & 0x0040)) 1306 dev->stats.tx_heartbeat_errors++; 1307 if ((ptr->status) & 0x0400) 1308 dev->stats.tx_carrier_errors++; 1309 if ((ptr->status) & 0x0800) 1310 dev->stats.collisions++; 1311 if ((ptr->status) & 0x1000) 1312 dev->stats.tx_aborted_errors++; 1313 } 1314 1315 dev_kfree_skb_irq(skb); 1316 1317 tx_cmd->cmd.command = 0; /* Mark free */ 1318 break; 1319 } 1320 case CmdTDR: 1321 { 1322 unsigned short status = ((struct tdr_cmd *)ptr)->status; 1323 1324 if (status & 0x8000) { 1325 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name)); 1326 } else { 1327 if (status & 0x4000) 1328 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name); 1329 if (status & 0x2000) 1330 printk(KERN_ERR "%s: Termination problem.\n", dev->name); 1331 if (status & 0x1000) 1332 printk(KERN_ERR "%s: Short circuit.\n", dev->name); 1333 1334 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff)); 1335 } 1336 break; 1337 } 1338 case CmdConfigure: 1339 case CmdMulticastList: 1340 /* Zap command so set_multicast_list() knows it is free */ 1341 ptr->command = 0; 1342 break; 1343 } 1344 ptr->v_next = ptr->b_next = I596_NULL; 1345 lp->last_cmd = jiffies; 1346 } 1347 1348 ptr = lp->cmd_head; 1349 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) { 1350 ptr->command &= 0x1fff; 1351 ptr = ptr->v_next; 1352 } 1353 1354 if ((lp->cmd_head != I596_NULL)) 1355 ack_cmd |= CUC_START; 1356 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status)); 1357 } 1358 if ((status & 0x1000) || (status & 0x4000)) { 1359 if ((status & 0x4000)) 1360 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name)); 1361 i596_rx(dev); 1362 /* Only RX_START if stopped - RGH 07-07-96 */ 1363 if (status & 0x1000) { 1364 if (netif_running(dev)) { 1365 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status)); 1366 ack_cmd |= RX_START; 1367 dev->stats.rx_errors++; 1368 dev->stats.rx_fifo_errors++; 1369 rebuild_rx_bufs(dev); 1370 } 1371 } 1372 } 1373 wait_cmd(dev,lp,100,"i596 interrupt, timeout"); 1374 lp->scb.command = ack_cmd; 1375 1376 #ifdef ENABLE_MVME16x_NET 1377 if (MACH_IS_MVME16x) { 1378 /* Ack the interrupt */ 1379 1380 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; 1381 1382 pcc2[0x2a] |= 0x08; 1383 } 1384 #endif 1385 #ifdef ENABLE_BVME6000_NET 1386 if (MACH_IS_BVME6000) { 1387 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; 1388 1389 *ethirq = 1; 1390 *ethirq = 3; 1391 } 1392 #endif 1393 CA(dev); 1394 1395 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); 1396 1397 spin_unlock (&lp->lock); 1398 return IRQ_RETVAL(handled); 1399 } 1400 1401 static int i596_close(struct net_device *dev) 1402 { 1403 struct i596_private *lp = dev->ml_priv; 1404 unsigned long flags; 1405 1406 netif_stop_queue(dev); 1407 1408 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n", 1409 dev->name, lp->scb.status)); 1410 1411 spin_lock_irqsave(&lp->lock, flags); 1412 1413 wait_cmd(dev,lp,100,"close1 timed out"); 1414 lp->scb.command = CUC_ABORT | RX_ABORT; 1415 CA(dev); 1416 1417 wait_cmd(dev,lp,100,"close2 timed out"); 1418 1419 spin_unlock_irqrestore(&lp->lock, flags); 1420 DEB(DEB_STRUCT,i596_display_data(dev)); 1421 i596_cleanup_cmd(dev,lp); 1422 1423 #ifdef ENABLE_MVME16x_NET 1424 if (MACH_IS_MVME16x) { 1425 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; 1426 1427 /* Disable all ints */ 1428 pcc2[0x28] = 1; 1429 pcc2[0x2a] = 0x40; 1430 pcc2[0x2b] = 0x40; /* Set snooping bits now! */ 1431 } 1432 #endif 1433 #ifdef ENABLE_BVME6000_NET 1434 if (MACH_IS_BVME6000) { 1435 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; 1436 1437 *ethirq = 1; 1438 } 1439 #endif 1440 1441 #ifdef ENABLE_MVME16x_NET 1442 free_irq(0x56, dev); 1443 #endif 1444 free_irq(dev->irq, dev); 1445 remove_rx_bufs(dev); 1446 1447 return 0; 1448 } 1449 1450 /* 1451 * Set or clear the multicast filter for this adaptor. 1452 */ 1453 1454 static void set_multicast_list(struct net_device *dev) 1455 { 1456 struct i596_private *lp = dev->ml_priv; 1457 int config = 0, cnt; 1458 1459 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n", 1460 dev->name, netdev_mc_count(dev), 1461 dev->flags & IFF_PROMISC ? "ON" : "OFF", 1462 dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); 1463 1464 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out")) 1465 return; 1466 1467 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) { 1468 lp->cf_cmd.i596_config[8] |= 0x01; 1469 config = 1; 1470 } 1471 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) { 1472 lp->cf_cmd.i596_config[8] &= ~0x01; 1473 config = 1; 1474 } 1475 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) { 1476 lp->cf_cmd.i596_config[11] &= ~0x20; 1477 config = 1; 1478 } 1479 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) { 1480 lp->cf_cmd.i596_config[11] |= 0x20; 1481 config = 1; 1482 } 1483 if (config) { 1484 lp->cf_cmd.cmd.command = CmdConfigure; 1485 i596_add_cmd(dev, &lp->cf_cmd.cmd); 1486 } 1487 1488 cnt = netdev_mc_count(dev); 1489 if (cnt > MAX_MC_CNT) 1490 { 1491 cnt = MAX_MC_CNT; 1492 printk(KERN_ERR "%s: Only %d multicast addresses supported", 1493 dev->name, cnt); 1494 } 1495 1496 if (!netdev_mc_empty(dev)) { 1497 struct netdev_hw_addr *ha; 1498 unsigned char *cp; 1499 struct mc_cmd *cmd; 1500 1501 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out")) 1502 return; 1503 cmd = &lp->mc_cmd; 1504 cmd->cmd.command = CmdMulticastList; 1505 cmd->mc_cnt = cnt * ETH_ALEN; 1506 cp = cmd->mc_addrs; 1507 netdev_for_each_mc_addr(ha, dev) { 1508 if (!cnt--) 1509 break; 1510 memcpy(cp, ha->addr, ETH_ALEN); 1511 if (i596_debug > 1) 1512 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n", 1513 dev->name, cp)); 1514 cp += ETH_ALEN; 1515 } 1516 i596_add_cmd(dev, &cmd->cmd); 1517 } 1518 } 1519 1520 #ifdef MODULE 1521 static struct net_device *dev_82596; 1522 1523 static int debug = -1; 1524 module_param(debug, int, 0); 1525 MODULE_PARM_DESC(debug, "i82596 debug mask"); 1526 1527 int __init init_module(void) 1528 { 1529 if (debug >= 0) 1530 i596_debug = debug; 1531 dev_82596 = i82596_probe(-1); 1532 if (IS_ERR(dev_82596)) 1533 return PTR_ERR(dev_82596); 1534 return 0; 1535 } 1536 1537 void __exit cleanup_module(void) 1538 { 1539 unregister_netdev(dev_82596); 1540 #ifdef __mc68000__ 1541 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, 1542 * XXX which may be invalid (CONFIG_060_WRITETHROUGH) 1543 */ 1544 1545 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096, 1546 IOMAP_FULL_CACHING); 1547 #endif 1548 free_page ((u32)(dev_82596->mem_start)); 1549 free_netdev(dev_82596); 1550 } 1551 1552 #endif /* MODULE */ 1553