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