1 /* 2 * Sun3 i82586 Ethernet driver 3 * 4 * Cloned from ni52.c for the Sun3 by Sam Creasey (sammy@sammy.net) 5 * 6 * Original copyright follows: 7 * -------------------------- 8 * 9 * net-3-driver for the NI5210 card (i82586 Ethernet chip) 10 * 11 * This is an extension to the Linux operating system, and is covered by the 12 * same Gnu Public License that covers that work. 13 * 14 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later) 15 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de) 16 * -------------------------- 17 * 18 * Consult ni52.c for further notes from the original driver. 19 * 20 * This incarnation currently supports the OBIO version of the i82586 chip 21 * used in certain sun3 models. It should be fairly doable to expand this 22 * to support VME if I should every acquire such a board. 23 * 24 */ 25 26 static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */ 27 static int automatic_resume = 0; /* experimental .. better should be zero */ 28 static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */ 29 static int fifo=0x8; /* don't change */ 30 31 #include <linux/module.h> 32 #include <linux/kernel.h> 33 #include <linux/string.h> 34 #include <linux/errno.h> 35 #include <linux/ioport.h> 36 #include <linux/interrupt.h> 37 #include <linux/delay.h> 38 #include <linux/init.h> 39 #include <linux/bitops.h> 40 #include <asm/io.h> 41 #include <asm/idprom.h> 42 #include <asm/machines.h> 43 #include <asm/sun3mmu.h> 44 #include <asm/dvma.h> 45 #include <asm/byteorder.h> 46 47 #include <linux/netdevice.h> 48 #include <linux/etherdevice.h> 49 #include <linux/skbuff.h> 50 51 #include "sun3_82586.h" 52 53 #define DRV_NAME "sun3_82586" 54 55 #define DEBUG /* debug on */ 56 #define SYSBUSVAL 0 /* 16 Bit */ 57 #define SUN3_82586_TOTAL_SIZE PAGE_SIZE 58 59 #define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;} 60 #define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;} 61 #define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;} 62 #define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;} 63 #define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);} 64 65 #define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) ) 66 #define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base)) 67 #define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop ))) 68 69 /******************* how to calculate the buffers ***************************** 70 71 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works 72 * --------------- in a different (more stable?) mode. Only in this mode it's 73 * possible to configure the driver with 'NO_NOPCOMMANDS' 74 75 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8; 76 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT 77 sizeof(rfd) = 24; sizeof(rbd) = 12; 78 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16; 79 sizeof(nop_cmd) = 8; 80 81 * if you don't know the driver, better do not change these values: */ 82 83 #define RECV_BUFF_SIZE 1536 /* slightly oversized */ 84 #define XMIT_BUFF_SIZE 1536 /* slightly oversized */ 85 #define NUM_XMIT_BUFFS 1 /* config for 32K shmem */ 86 #define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */ 87 #define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */ 88 #define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */ 89 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */ 90 91 /**************************************************************************/ 92 93 /* different DELAYs */ 94 #define DELAY(x) mdelay(32 * x); 95 #define DELAY_16(); { udelay(16); } 96 #define DELAY_18(); { udelay(4); } 97 98 /* wait for command with timeout: */ 99 #define WAIT_4_SCB_CMD() \ 100 { int i; \ 101 for(i=0;i<16384;i++) { \ 102 if(!p->scb->cmd_cuc) break; \ 103 DELAY_18(); \ 104 if(i == 16383) { \ 105 printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \ 106 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } } 107 108 #define WAIT_4_SCB_CMD_RUC() { int i; \ 109 for(i=0;i<16384;i++) { \ 110 if(!p->scb->cmd_ruc) break; \ 111 DELAY_18(); \ 112 if(i == 16383) { \ 113 printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \ 114 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } } 115 116 #define WAIT_4_STAT_COMPL(addr) { int i; \ 117 for(i=0;i<32767;i++) { \ 118 if(swab16((addr)->cmd_status) & STAT_COMPL) break; \ 119 DELAY_16(); DELAY_16(); } } 120 121 static int sun3_82586_probe1(struct net_device *dev,int ioaddr); 122 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id); 123 static int sun3_82586_open(struct net_device *dev); 124 static int sun3_82586_close(struct net_device *dev); 125 static int sun3_82586_send_packet(struct sk_buff *,struct net_device *); 126 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev); 127 static void set_multicast_list(struct net_device *dev); 128 static void sun3_82586_timeout(struct net_device *dev); 129 #if 0 130 static void sun3_82586_dump(struct net_device *,void *); 131 #endif 132 133 /* helper-functions */ 134 static int init586(struct net_device *dev); 135 static int check586(struct net_device *dev,char *where,unsigned size); 136 static void alloc586(struct net_device *dev); 137 static void startrecv586(struct net_device *dev); 138 static void *alloc_rfa(struct net_device *dev,void *ptr); 139 static void sun3_82586_rcv_int(struct net_device *dev); 140 static void sun3_82586_xmt_int(struct net_device *dev); 141 static void sun3_82586_rnr_int(struct net_device *dev); 142 143 struct priv 144 { 145 unsigned long base; 146 char *memtop; 147 long int lock; 148 int reseted; 149 volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first; 150 volatile struct scp_struct *scp; /* volatile is important */ 151 volatile struct iscp_struct *iscp; /* volatile is important */ 152 volatile struct scb_struct *scb; /* volatile is important */ 153 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS]; 154 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS]; 155 #if (NUM_XMIT_BUFFS == 1) 156 volatile struct nop_cmd_struct *nop_cmds[2]; 157 #else 158 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS]; 159 #endif 160 volatile int nop_point,num_recv_buffs; 161 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS]; 162 volatile int xmit_count,xmit_last; 163 }; 164 165 /********************************************** 166 * close device 167 */ 168 static int sun3_82586_close(struct net_device *dev) 169 { 170 free_irq(dev->irq, dev); 171 172 sun3_reset586(); /* the hard way to stop the receiver */ 173 174 netif_stop_queue(dev); 175 176 return 0; 177 } 178 179 /********************************************** 180 * open device 181 */ 182 static int sun3_82586_open(struct net_device *dev) 183 { 184 int ret; 185 186 sun3_disint(); 187 alloc586(dev); 188 init586(dev); 189 startrecv586(dev); 190 sun3_enaint(); 191 192 ret = request_irq(dev->irq, sun3_82586_interrupt,0,dev->name,dev); 193 if (ret) 194 { 195 sun3_reset586(); 196 return ret; 197 } 198 199 netif_start_queue(dev); 200 201 return 0; /* most done by init */ 202 } 203 204 /********************************************** 205 * Check to see if there's an 82586 out there. 206 */ 207 static int check586(struct net_device *dev,char *where,unsigned size) 208 { 209 struct priv pb; 210 struct priv *p = &pb; 211 char *iscp_addr; 212 int i; 213 214 p->base = (unsigned long) dvma_btov(0); 215 p->memtop = (char *)dvma_btov((unsigned long)where); 216 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS); 217 memset((char *)p->scp,0, sizeof(struct scp_struct)); 218 for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */ 219 if(((char *)p->scp)[i]) 220 return 0; 221 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */ 222 if(p->scp->sysbus != SYSBUSVAL) 223 return 0; 224 225 iscp_addr = (char *)dvma_btov((unsigned long)where); 226 227 p->iscp = (struct iscp_struct *) iscp_addr; 228 memset((char *)p->iscp,0, sizeof(struct iscp_struct)); 229 230 p->scp->iscp = make24(p->iscp); 231 p->iscp->busy = 1; 232 233 sun3_reset586(); 234 sun3_attn586(); 235 DELAY(1); /* wait a while... */ 236 237 if(p->iscp->busy) /* i82586 clears 'busy' after successful init */ 238 return 0; 239 240 return 1; 241 } 242 243 /****************************************************************** 244 * set iscp at the right place, called by sun3_82586_probe1 and open586. 245 */ 246 static void alloc586(struct net_device *dev) 247 { 248 struct priv *p = netdev_priv(dev); 249 250 sun3_reset586(); 251 DELAY(1); 252 253 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS); 254 p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start); 255 p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct)); 256 257 memset((char *) p->iscp,0,sizeof(struct iscp_struct)); 258 memset((char *) p->scp ,0,sizeof(struct scp_struct)); 259 260 p->scp->iscp = make24(p->iscp); 261 p->scp->sysbus = SYSBUSVAL; 262 p->iscp->scb_offset = make16(p->scb); 263 p->iscp->scb_base = make24(dvma_btov(dev->mem_start)); 264 265 p->iscp->busy = 1; 266 sun3_reset586(); 267 sun3_attn586(); 268 269 DELAY(1); 270 271 if(p->iscp->busy) 272 printk("%s: Init-Problems (alloc).\n",dev->name); 273 274 p->reseted = 0; 275 276 memset((char *)p->scb,0,sizeof(struct scb_struct)); 277 } 278 279 struct net_device * __init sun3_82586_probe(int unit) 280 { 281 struct net_device *dev; 282 unsigned long ioaddr; 283 static int found = 0; 284 int err = -ENOMEM; 285 286 /* check that this machine has an onboard 82586 */ 287 switch(idprom->id_machtype) { 288 case SM_SUN3|SM_3_160: 289 case SM_SUN3|SM_3_260: 290 /* these machines have 82586 */ 291 break; 292 293 default: 294 return ERR_PTR(-ENODEV); 295 } 296 297 if (found) 298 return ERR_PTR(-ENODEV); 299 300 ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE); 301 if (!ioaddr) 302 return ERR_PTR(-ENOMEM); 303 found = 1; 304 305 dev = alloc_etherdev(sizeof(struct priv)); 306 if (!dev) 307 goto out; 308 if (unit >= 0) { 309 sprintf(dev->name, "eth%d", unit); 310 netdev_boot_setup_check(dev); 311 } 312 313 dev->irq = IE_IRQ; 314 dev->base_addr = ioaddr; 315 err = sun3_82586_probe1(dev, ioaddr); 316 if (err) 317 goto out1; 318 err = register_netdev(dev); 319 if (err) 320 goto out2; 321 return dev; 322 323 out2: 324 release_region(ioaddr, SUN3_82586_TOTAL_SIZE); 325 out1: 326 free_netdev(dev); 327 out: 328 iounmap((void __iomem *)ioaddr); 329 return ERR_PTR(err); 330 } 331 332 static const struct net_device_ops sun3_82586_netdev_ops = { 333 .ndo_open = sun3_82586_open, 334 .ndo_stop = sun3_82586_close, 335 .ndo_start_xmit = sun3_82586_send_packet, 336 .ndo_set_rx_mode = set_multicast_list, 337 .ndo_tx_timeout = sun3_82586_timeout, 338 .ndo_get_stats = sun3_82586_get_stats, 339 .ndo_validate_addr = eth_validate_addr, 340 .ndo_set_mac_address = eth_mac_addr, 341 .ndo_change_mtu = eth_change_mtu, 342 }; 343 344 static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr) 345 { 346 int i, size, retval; 347 348 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME)) 349 return -EBUSY; 350 351 /* copy in the ethernet address from the prom */ 352 for(i = 0; i < 6 ; i++) 353 dev->dev_addr[i] = idprom->id_ethaddr[i]; 354 355 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr); 356 357 /* 358 * check (or search) IO-Memory, 32K 359 */ 360 size = 0x8000; 361 362 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000); 363 dev->mem_end = dev->mem_start + size; 364 365 if(size != 0x2000 && size != 0x4000 && size != 0x8000) { 366 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size); 367 retval = -ENODEV; 368 goto out; 369 } 370 if(!check586(dev,(char *) dev->mem_start,size)) { 371 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size); 372 retval = -ENODEV; 373 goto out; 374 } 375 376 ((struct priv *)netdev_priv(dev))->memtop = 377 (char *)dvma_btov(dev->mem_start); 378 ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0); 379 alloc586(dev); 380 381 /* set number of receive-buffs according to memsize */ 382 if(size == 0x2000) 383 ((struct priv *)netdev_priv(dev))->num_recv_buffs = 384 NUM_RECV_BUFFS_8; 385 else if(size == 0x4000) 386 ((struct priv *)netdev_priv(dev))->num_recv_buffs = 387 NUM_RECV_BUFFS_16; 388 else 389 ((struct priv *)netdev_priv(dev))->num_recv_buffs = 390 NUM_RECV_BUFFS_32; 391 392 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq); 393 394 dev->netdev_ops = &sun3_82586_netdev_ops; 395 dev->watchdog_timeo = HZ/20; 396 397 dev->if_port = 0; 398 return 0; 399 out: 400 release_region(ioaddr, SUN3_82586_TOTAL_SIZE); 401 return retval; 402 } 403 404 405 static int init586(struct net_device *dev) 406 { 407 void *ptr; 408 int i,result=0; 409 struct priv *p = netdev_priv(dev); 410 volatile struct configure_cmd_struct *cfg_cmd; 411 volatile struct iasetup_cmd_struct *ias_cmd; 412 volatile struct tdr_cmd_struct *tdr_cmd; 413 volatile struct mcsetup_cmd_struct *mc_cmd; 414 struct netdev_hw_addr *ha; 415 int num_addrs=netdev_mc_count(dev); 416 417 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct)); 418 419 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */ 420 cfg_cmd->cmd_status = 0; 421 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST); 422 cfg_cmd->cmd_link = 0xffff; 423 424 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */ 425 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */ 426 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */ 427 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */ 428 cfg_cmd->priority = 0x00; 429 cfg_cmd->ifs = 0x60; 430 cfg_cmd->time_low = 0x00; 431 cfg_cmd->time_high = 0xf2; 432 cfg_cmd->promisc = 0; 433 if(dev->flags & IFF_ALLMULTI) { 434 int len = ((char *) p->iscp - (char *) ptr - 8) / 6; 435 if(num_addrs > len) { 436 printk("%s: switching to promisc. mode\n",dev->name); 437 cfg_cmd->promisc = 1; 438 } 439 } 440 if(dev->flags&IFF_PROMISC) 441 cfg_cmd->promisc = 1; 442 cfg_cmd->carr_coll = 0x00; 443 444 p->scb->cbl_offset = make16(cfg_cmd); 445 p->scb->cmd_ruc = 0; 446 447 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */ 448 sun3_attn586(); 449 450 WAIT_4_STAT_COMPL(cfg_cmd); 451 452 if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK)) 453 { 454 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status)); 455 return 1; 456 } 457 458 /* 459 * individual address setup 460 */ 461 462 ias_cmd = (struct iasetup_cmd_struct *)ptr; 463 464 ias_cmd->cmd_status = 0; 465 ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST); 466 ias_cmd->cmd_link = 0xffff; 467 468 memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN); 469 470 p->scb->cbl_offset = make16(ias_cmd); 471 472 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */ 473 sun3_attn586(); 474 475 WAIT_4_STAT_COMPL(ias_cmd); 476 477 if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) { 478 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status)); 479 return 1; 480 } 481 482 /* 483 * TDR, wire check .. e.g. no resistor e.t.c 484 */ 485 486 tdr_cmd = (struct tdr_cmd_struct *)ptr; 487 488 tdr_cmd->cmd_status = 0; 489 tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST); 490 tdr_cmd->cmd_link = 0xffff; 491 tdr_cmd->status = 0; 492 493 p->scb->cbl_offset = make16(tdr_cmd); 494 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */ 495 sun3_attn586(); 496 497 WAIT_4_STAT_COMPL(tdr_cmd); 498 499 if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL)) 500 { 501 printk("%s: Problems while running the TDR.\n",dev->name); 502 } 503 else 504 { 505 DELAY_16(); /* wait for result */ 506 result = swab16(tdr_cmd->status); 507 508 p->scb->cmd_cuc = p->scb->cus & STAT_MASK; 509 sun3_attn586(); /* ack the interrupts */ 510 511 if(result & TDR_LNK_OK) 512 ; 513 else if(result & TDR_XCVR_PRB) 514 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name); 515 else if(result & TDR_ET_OPN) 516 printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK); 517 else if(result & TDR_ET_SRT) 518 { 519 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */ 520 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK); 521 } 522 else 523 printk("%s: TDR: Unknown status %04x\n",dev->name,result); 524 } 525 526 /* 527 * Multicast setup 528 */ 529 if(num_addrs && !(dev->flags & IFF_PROMISC) ) 530 { 531 mc_cmd = (struct mcsetup_cmd_struct *) ptr; 532 mc_cmd->cmd_status = 0; 533 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST); 534 mc_cmd->cmd_link = 0xffff; 535 mc_cmd->mc_cnt = swab16(num_addrs * 6); 536 537 i = 0; 538 netdev_for_each_mc_addr(ha, dev) 539 memcpy((char *) mc_cmd->mc_list[i++], 540 ha->addr, ETH_ALEN); 541 542 p->scb->cbl_offset = make16(mc_cmd); 543 p->scb->cmd_cuc = CUC_START; 544 sun3_attn586(); 545 546 WAIT_4_STAT_COMPL(mc_cmd); 547 548 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) ) 549 printk("%s: Can't apply multicast-address-list.\n",dev->name); 550 } 551 552 /* 553 * alloc nop/xmit-cmds 554 */ 555 #if (NUM_XMIT_BUFFS == 1) 556 for(i=0;i<2;i++) 557 { 558 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr; 559 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP); 560 p->nop_cmds[i]->cmd_status = 0; 561 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); 562 ptr = (char *) ptr + sizeof(struct nop_cmd_struct); 563 } 564 #else 565 for(i=0;i<NUM_XMIT_BUFFS;i++) 566 { 567 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr; 568 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP); 569 p->nop_cmds[i]->cmd_status = 0; 570 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i])); 571 ptr = (char *) ptr + sizeof(struct nop_cmd_struct); 572 } 573 #endif 574 575 ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */ 576 577 /* 578 * alloc xmit-buffs / init xmit_cmds 579 */ 580 for(i=0;i<NUM_XMIT_BUFFS;i++) 581 { 582 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/ 583 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct); 584 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */ 585 ptr = (char *) ptr + XMIT_BUFF_SIZE; 586 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */ 587 ptr = (char *) ptr + sizeof(struct tbd_struct); 588 if((void *)ptr > (void *)dev->mem_end) 589 { 590 printk("%s: not enough shared-mem for your configuration!\n",dev->name); 591 return 1; 592 } 593 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct)); 594 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct)); 595 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]); 596 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL); 597 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT); 598 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i])); 599 p->xmit_buffs[i]->next = 0xffff; 600 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i])); 601 } 602 603 p->xmit_count = 0; 604 p->xmit_last = 0; 605 #ifndef NO_NOPCOMMANDS 606 p->nop_point = 0; 607 #endif 608 609 /* 610 * 'start transmitter' 611 */ 612 #ifndef NO_NOPCOMMANDS 613 p->scb->cbl_offset = make16(p->nop_cmds[0]); 614 p->scb->cmd_cuc = CUC_START; 615 sun3_attn586(); 616 WAIT_4_SCB_CMD(); 617 #else 618 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]); 619 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT); 620 #endif 621 622 /* 623 * ack. interrupts 624 */ 625 p->scb->cmd_cuc = p->scb->cus & STAT_MASK; 626 sun3_attn586(); 627 DELAY_16(); 628 629 sun3_enaint(); 630 sun3_active(); 631 632 return 0; 633 } 634 635 /****************************************************** 636 * This is a helper routine for sun3_82586_rnr_int() and init586(). 637 * It sets up the Receive Frame Area (RFA). 638 */ 639 640 static void *alloc_rfa(struct net_device *dev,void *ptr) 641 { 642 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr; 643 volatile struct rbd_struct *rbd; 644 int i; 645 struct priv *p = netdev_priv(dev); 646 647 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd)); 648 p->rfd_first = rfd; 649 650 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) { 651 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) ); 652 rfd[i].rbd_offset = 0xffff; 653 } 654 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */ 655 656 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) ); 657 658 rbd = (struct rbd_struct *) ptr; 659 ptr = (void *) (rbd + p->num_recv_buffs); 660 661 /* clr descriptors */ 662 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs)); 663 664 for(i=0;i<p->num_recv_buffs;i++) 665 { 666 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs)); 667 rbd[i].size = swab16(RECV_BUFF_SIZE); 668 rbd[i].buffer = make24(ptr); 669 ptr = (char *) ptr + RECV_BUFF_SIZE; 670 } 671 672 p->rfd_top = p->rfd_first; 673 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd); 674 675 p->scb->rfa_offset = make16(p->rfd_first); 676 p->rfd_first->rbd_offset = make16(rbd); 677 678 return ptr; 679 } 680 681 682 /************************************************** 683 * Interrupt Handler ... 684 */ 685 686 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id) 687 { 688 struct net_device *dev = dev_id; 689 unsigned short stat; 690 int cnt=0; 691 struct priv *p; 692 693 if (!dev) { 694 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq); 695 return IRQ_NONE; 696 } 697 p = netdev_priv(dev); 698 699 if(debuglevel > 1) 700 printk("I"); 701 702 WAIT_4_SCB_CMD(); /* wait for last command */ 703 704 while((stat=p->scb->cus & STAT_MASK)) 705 { 706 p->scb->cmd_cuc = stat; 707 sun3_attn586(); 708 709 if(stat & STAT_FR) /* received a frame */ 710 sun3_82586_rcv_int(dev); 711 712 if(stat & STAT_RNR) /* RU went 'not ready' */ 713 { 714 printk("(R)"); 715 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */ 716 { 717 WAIT_4_SCB_CMD(); 718 p->scb->cmd_ruc = RUC_RESUME; 719 sun3_attn586(); 720 WAIT_4_SCB_CMD_RUC(); 721 } 722 else 723 { 724 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus); 725 sun3_82586_rnr_int(dev); 726 } 727 } 728 729 if(stat & STAT_CX) /* command with I-bit set complete */ 730 sun3_82586_xmt_int(dev); 731 732 #ifndef NO_NOPCOMMANDS 733 if(stat & STAT_CNA) /* CU went 'not ready' */ 734 { 735 if(netif_running(dev)) 736 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus); 737 } 738 #endif 739 740 if(debuglevel > 1) 741 printk("%d",cnt++); 742 743 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */ 744 if(p->scb->cmd_cuc) /* timed out? */ 745 { 746 printk("%s: Acknowledge timed out.\n",dev->name); 747 sun3_disint(); 748 break; 749 } 750 } 751 752 if(debuglevel > 1) 753 printk("i"); 754 return IRQ_HANDLED; 755 } 756 757 /******************************************************* 758 * receive-interrupt 759 */ 760 761 static void sun3_82586_rcv_int(struct net_device *dev) 762 { 763 int status,cnt=0; 764 unsigned short totlen; 765 struct sk_buff *skb; 766 struct rbd_struct *rbd; 767 struct priv *p = netdev_priv(dev); 768 769 if(debuglevel > 0) 770 printk("R"); 771 772 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;) 773 { 774 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset); 775 776 if(status & RFD_OK) /* frame received without error? */ 777 { 778 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */ 779 { 780 totlen &= RBD_MASK; /* length of this frame */ 781 rbd->status = 0; 782 skb = (struct sk_buff *) dev_alloc_skb(totlen+2); 783 if(skb != NULL) 784 { 785 skb_reserve(skb,2); 786 skb_put(skb,totlen); 787 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen); 788 skb->protocol=eth_type_trans(skb,dev); 789 netif_rx(skb); 790 dev->stats.rx_packets++; 791 } 792 else 793 dev->stats.rx_dropped++; 794 } 795 else 796 { 797 int rstat; 798 /* free all RBD's until RBD_LAST is set */ 799 totlen = 0; 800 while(!((rstat=swab16(rbd->status)) & RBD_LAST)) 801 { 802 totlen += rstat & RBD_MASK; 803 if(!rstat) 804 { 805 printk("%s: Whoops .. no end mark in RBD list\n",dev->name); 806 break; 807 } 808 rbd->status = 0; 809 rbd = (struct rbd_struct *) make32(rbd->next); 810 } 811 totlen += rstat & RBD_MASK; 812 rbd->status = 0; 813 printk("%s: received oversized frame! length: %d\n",dev->name,totlen); 814 dev->stats.rx_dropped++; 815 } 816 } 817 else /* frame !(ok), only with 'save-bad-frames' */ 818 { 819 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status); 820 dev->stats.rx_errors++; 821 } 822 p->rfd_top->stat_high = 0; 823 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */ 824 p->rfd_top->rbd_offset = 0xffff; 825 p->rfd_last->last = 0; /* delete RFD_SUSP */ 826 p->rfd_last = p->rfd_top; 827 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */ 828 p->scb->rfa_offset = make16(p->rfd_top); 829 830 if(debuglevel > 0) 831 printk("%d",cnt++); 832 } 833 834 if(automatic_resume) 835 { 836 WAIT_4_SCB_CMD(); 837 p->scb->cmd_ruc = RUC_RESUME; 838 sun3_attn586(); 839 WAIT_4_SCB_CMD_RUC(); 840 } 841 842 #ifdef WAIT_4_BUSY 843 { 844 int i; 845 for(i=0;i<1024;i++) 846 { 847 if(p->rfd_top->status) 848 break; 849 DELAY_16(); 850 if(i == 1023) 851 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name); 852 } 853 } 854 #endif 855 856 #if 0 857 if(!at_least_one) 858 { 859 int i; 860 volatile struct rfd_struct *rfds=p->rfd_top; 861 volatile struct rbd_struct *rbds; 862 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least); 863 for(i=0;i< (p->num_recv_buffs+4);i++) 864 { 865 rbds = (struct rbd_struct *) make32(rfds->rbd_offset); 866 printk("%04x:%04x ",rfds->status,rbds->status); 867 rfds = (struct rfd_struct *) make32(rfds->next); 868 } 869 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status); 870 printk("\nerrs: %04x %04x rus: %02x, cus: %02x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->rus,(int)p->scb->cus); 871 } 872 old_at_least = at_least_one; 873 #endif 874 875 if(debuglevel > 0) 876 printk("r"); 877 } 878 879 /********************************************************** 880 * handle 'Receiver went not ready'. 881 */ 882 883 static void sun3_82586_rnr_int(struct net_device *dev) 884 { 885 struct priv *p = netdev_priv(dev); 886 887 dev->stats.rx_errors++; 888 889 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */ 890 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */ 891 sun3_attn586(); 892 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */ 893 894 alloc_rfa(dev,(char *)p->rfd_first); 895 /* maybe add a check here, before restarting the RU */ 896 startrecv586(dev); /* restart RU */ 897 898 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus); 899 900 } 901 902 /********************************************************** 903 * handle xmit - interrupt 904 */ 905 906 static void sun3_82586_xmt_int(struct net_device *dev) 907 { 908 int status; 909 struct priv *p = netdev_priv(dev); 910 911 if(debuglevel > 0) 912 printk("X"); 913 914 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status); 915 if(!(status & STAT_COMPL)) 916 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name); 917 918 if(status & STAT_OK) 919 { 920 dev->stats.tx_packets++; 921 dev->stats.collisions += (status & TCMD_MAXCOLLMASK); 922 } 923 else 924 { 925 dev->stats.tx_errors++; 926 if(status & TCMD_LATECOLL) { 927 printk("%s: late collision detected.\n",dev->name); 928 dev->stats.collisions++; 929 } 930 else if(status & TCMD_NOCARRIER) { 931 dev->stats.tx_carrier_errors++; 932 printk("%s: no carrier detected.\n",dev->name); 933 } 934 else if(status & TCMD_LOSTCTS) 935 printk("%s: loss of CTS detected.\n",dev->name); 936 else if(status & TCMD_UNDERRUN) { 937 dev->stats.tx_fifo_errors++; 938 printk("%s: DMA underrun detected.\n",dev->name); 939 } 940 else if(status & TCMD_MAXCOLL) { 941 printk("%s: Max. collisions exceeded.\n",dev->name); 942 dev->stats.collisions += 16; 943 } 944 } 945 946 #if (NUM_XMIT_BUFFS > 1) 947 if( (++p->xmit_last) == NUM_XMIT_BUFFS) 948 p->xmit_last = 0; 949 #endif 950 netif_wake_queue(dev); 951 } 952 953 /*********************************************************** 954 * (re)start the receiver 955 */ 956 957 static void startrecv586(struct net_device *dev) 958 { 959 struct priv *p = netdev_priv(dev); 960 961 WAIT_4_SCB_CMD(); 962 WAIT_4_SCB_CMD_RUC(); 963 p->scb->rfa_offset = make16(p->rfd_first); 964 p->scb->cmd_ruc = RUC_START; 965 sun3_attn586(); /* start cmd. */ 966 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */ 967 } 968 969 static void sun3_82586_timeout(struct net_device *dev) 970 { 971 struct priv *p = netdev_priv(dev); 972 #ifndef NO_NOPCOMMANDS 973 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */ 974 { 975 netif_wake_queue(dev); 976 #ifdef DEBUG 977 printk("%s: strange ... timeout with CU active?!?\n",dev->name); 978 printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev->name,(int)swab16(p->xmit_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[1]->cmd_status),(int)p->nop_point); 979 #endif 980 p->scb->cmd_cuc = CUC_ABORT; 981 sun3_attn586(); 982 WAIT_4_SCB_CMD(); 983 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]); 984 p->scb->cmd_cuc = CUC_START; 985 sun3_attn586(); 986 WAIT_4_SCB_CMD(); 987 dev->trans_start = jiffies; /* prevent tx timeout */ 988 return 0; 989 } 990 #endif 991 { 992 #ifdef DEBUG 993 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus); 994 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status)); 995 printk("%s: check, whether you set the right interrupt number!\n",dev->name); 996 #endif 997 sun3_82586_close(dev); 998 sun3_82586_open(dev); 999 } 1000 dev->trans_start = jiffies; /* prevent tx timeout */ 1001 } 1002 1003 /****************************************************** 1004 * send frame 1005 */ 1006 1007 static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev) 1008 { 1009 int len,i; 1010 #ifndef NO_NOPCOMMANDS 1011 int next_nop; 1012 #endif 1013 struct priv *p = netdev_priv(dev); 1014 1015 if(skb->len > XMIT_BUFF_SIZE) 1016 { 1017 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len); 1018 return NETDEV_TX_OK; 1019 } 1020 1021 netif_stop_queue(dev); 1022 1023 #if(NUM_XMIT_BUFFS > 1) 1024 if(test_and_set_bit(0,(void *) &p->lock)) { 1025 printk("%s: Queue was locked\n",dev->name); 1026 return NETDEV_TX_BUSY; 1027 } 1028 else 1029 #endif 1030 { 1031 len = skb->len; 1032 if (len < ETH_ZLEN) { 1033 memset((void *)p->xmit_cbuffs[p->xmit_count], 0, 1034 ETH_ZLEN); 1035 len = ETH_ZLEN; 1036 } 1037 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len); 1038 1039 #if (NUM_XMIT_BUFFS == 1) 1040 # ifdef NO_NOPCOMMANDS 1041 1042 #ifdef DEBUG 1043 if(p->scb->cus & CU_ACTIVE) 1044 { 1045 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name); 1046 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status)); 1047 } 1048 #endif 1049 1050 p->xmit_buffs[0]->size = swab16(TBD_LAST | len); 1051 for(i=0;i<16;i++) 1052 { 1053 p->xmit_cmds[0]->cmd_status = 0; 1054 WAIT_4_SCB_CMD(); 1055 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND) 1056 p->scb->cmd_cuc = CUC_RESUME; 1057 else 1058 { 1059 p->scb->cbl_offset = make16(p->xmit_cmds[0]); 1060 p->scb->cmd_cuc = CUC_START; 1061 } 1062 1063 sun3_attn586(); 1064 if(!i) 1065 dev_kfree_skb(skb); 1066 WAIT_4_SCB_CMD(); 1067 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */ 1068 break; 1069 if(p->xmit_cmds[0]->cmd_status) 1070 break; 1071 if(i==15) 1072 printk("%s: Can't start transmit-command.\n",dev->name); 1073 } 1074 # else 1075 next_nop = (p->nop_point + 1) & 0x1; 1076 p->xmit_buffs[0]->size = swab16(TBD_LAST | len); 1077 1078 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link 1079 = make16((p->nop_cmds[next_nop])); 1080 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0; 1081 1082 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0])); 1083 p->nop_point = next_nop; 1084 dev_kfree_skb(skb); 1085 # endif 1086 #else 1087 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len); 1088 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS ) 1089 next_nop = 0; 1090 1091 p->xmit_cmds[p->xmit_count]->cmd_status = 0; 1092 /* linkpointer of xmit-command already points to next nop cmd */ 1093 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop])); 1094 p->nop_cmds[next_nop]->cmd_status = 0; 1095 1096 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count])); 1097 p->xmit_count = next_nop; 1098 1099 { 1100 unsigned long flags; 1101 local_irq_save(flags); 1102 if(p->xmit_count != p->xmit_last) 1103 netif_wake_queue(dev); 1104 p->lock = 0; 1105 local_irq_restore(flags); 1106 } 1107 dev_kfree_skb(skb); 1108 #endif 1109 } 1110 return NETDEV_TX_OK; 1111 } 1112 1113 /******************************************* 1114 * Someone wanna have the statistics 1115 */ 1116 1117 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev) 1118 { 1119 struct priv *p = netdev_priv(dev); 1120 unsigned short crc,aln,rsc,ovrn; 1121 1122 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */ 1123 p->scb->crc_errs = 0; 1124 aln = swab16(p->scb->aln_errs); 1125 p->scb->aln_errs = 0; 1126 rsc = swab16(p->scb->rsc_errs); 1127 p->scb->rsc_errs = 0; 1128 ovrn = swab16(p->scb->ovrn_errs); 1129 p->scb->ovrn_errs = 0; 1130 1131 dev->stats.rx_crc_errors += crc; 1132 dev->stats.rx_fifo_errors += ovrn; 1133 dev->stats.rx_frame_errors += aln; 1134 dev->stats.rx_dropped += rsc; 1135 1136 return &dev->stats; 1137 } 1138 1139 /******************************************************** 1140 * Set MC list .. 1141 */ 1142 1143 static void set_multicast_list(struct net_device *dev) 1144 { 1145 netif_stop_queue(dev); 1146 sun3_disint(); 1147 alloc586(dev); 1148 init586(dev); 1149 startrecv586(dev); 1150 sun3_enaint(); 1151 netif_wake_queue(dev); 1152 } 1153 1154 #ifdef MODULE 1155 #error This code is not currently supported as a module 1156 static struct net_device *dev_sun3_82586; 1157 1158 int init_module(void) 1159 { 1160 dev_sun3_82586 = sun3_82586_probe(-1); 1161 if (IS_ERR(dev_sun3_82586)) 1162 return PTR_ERR(dev_sun3_82586); 1163 return 0; 1164 } 1165 1166 void cleanup_module(void) 1167 { 1168 unsigned long ioaddr = dev_sun3_82586->base_addr; 1169 unregister_netdev(dev_sun3_82586); 1170 release_region(ioaddr, SUN3_82586_TOTAL_SIZE); 1171 iounmap((void *)ioaddr); 1172 free_netdev(dev_sun3_82586); 1173 } 1174 #endif /* MODULE */ 1175 1176 #if 0 1177 /* 1178 * DUMP .. we expect a not running CMD unit and enough space 1179 */ 1180 void sun3_82586_dump(struct net_device *dev,void *ptr) 1181 { 1182 struct priv *p = netdev_priv(dev); 1183 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr; 1184 int i; 1185 1186 p->scb->cmd_cuc = CUC_ABORT; 1187 sun3_attn586(); 1188 WAIT_4_SCB_CMD(); 1189 WAIT_4_SCB_CMD_RUC(); 1190 1191 dump_cmd->cmd_status = 0; 1192 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST; 1193 dump_cmd->dump_offset = make16((dump_cmd + 1)); 1194 dump_cmd->cmd_link = 0xffff; 1195 1196 p->scb->cbl_offset = make16(dump_cmd); 1197 p->scb->cmd_cuc = CUC_START; 1198 sun3_attn586(); 1199 WAIT_4_STAT_COMPL(dump_cmd); 1200 1201 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) ) 1202 printk("%s: Can't get dump information.\n",dev->name); 1203 1204 for(i=0;i<170;i++) { 1205 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]); 1206 if(i % 24 == 23) 1207 printk("\n"); 1208 } 1209 printk("\n"); 1210 } 1211 #endif 1212 1213 MODULE_LICENSE("GPL"); 1214