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