drivers/net/ni65.c

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 1 /*
 2  * ni6510 (am7990 'lance' chip) driver for Linux-net-3
 3  * BETAcode v0.71 (96/09/29) for 2.0.0 (or later)
 4  * copyrights (c) 1994,1995,1996 by M.Hipp
 5  *
 6  * This driver can handle the old ni6510 board and the newer ni6510
 7  * EtherBlaster. (probably it also works with every full NE2100
 8  * compatible card)
 9  *
 10  * To compile as module, type:
 11  * gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni65.c
 12  * driver probes: io: 0x360,0x300,0x320,0x340 / dma: 3,5,6,7
 13  *
 14  * This is an extension to the Linux operating system, and is covered by the
 15  * same Gnu Public License that covers the Linux-kernel.
 16  *
 17  * comments/bugs/suggestions can be sent to:
 18  * Michael Hipp
 19  * email: hippm@informatik.uni-tuebingen.de
 20  *
 21  * sources:
 22  * some things are from the 'ni6510-packet-driver for dos by Russ Nelson'
 23  * and from the original drivers by D.Becker
 24  *
 25  * known problems:
 26  * - on some PCI boards (including my own) the card/board/ISA-bridge has
 27  * problems with bus master DMA. This results in lotsa overruns.
 28  * It may help to '#define RCV_PARANOIA_CHECK' or try to #undef
 29  * the XMT and RCV_VIA_SKB option .. this reduces driver performance.
 30  * Or just play with your BIOS options to optimize ISA-DMA access.
 31  * Maybe you also wanna play with the LOW_PERFORAMCE and MID_PERFORMANCE
 32  * defines -> please report me your experience then
 33  * - Harald reported for ASUS SP3G mainboards, that you should use
 34  * the 'optimal settings' from the user's manual on page 3-12!
 35  *
 36  * credits:
 37  * thanx to Jason Sullivan for sending me a ni6510 card!
 38  * lot of debug runs with ASUS SP3G Boards (Intel Saturn) by Harald Koenig
 39  *
 40  * simple performance test: (486DX-33/Ni6510-EB receives from 486DX4-100/Ni6510-EB)
 41  * average: FTP -> 8384421 bytes received in 8.5 seconds
 42  * (no RCV_VIA_SKB,no XMT_VIA_SKB,PARANOIA_CHECK,4 XMIT BUFS, 8 RCV_BUFFS)
 43  * peak: FTP -> 8384421 bytes received in 7.5 seconds
 44  * (RCV_VIA_SKB,XMT_VIA_SKB,no PARANOIA_CHECK,1(!) XMIT BUF, 16 RCV BUFFS)
 45  */
 46
 47 /*
 48  * 99.Jun.8: added support for /proc/net/dev byte count for xosview (HK)
 49  * 96.Sept.29: virt_to_bus stuff added for new memory modell
 50  * 96.April.29: Added Harald Koenig's Patches (MH)
 51  * 96.April.13: enhanced error handling .. more tests (MH)
 52  * 96.April.5/6: a lot of performance tests. Got it stable now (hopefully) (MH)
 53  * 96.April.1: (no joke ;) .. added EtherBlaster and Module support (MH)
 54  * 96.Feb.19: fixed a few bugs .. cleanups .. tested for 1.3.66 (MH)
 55  * hopefully no more 16MB limit
 56  *
 57  * 95.Nov.18: multicast tweaked (AC).
 58  *
 59  * 94.Aug.22: changes in xmit_intr (ack more than one xmitted-packet), ni65_send_packet (p->lock) (MH)
 60  *
 61  * 94.July.16: fixed bugs in recv_skb and skb-alloc stuff (MH)
 62  */
 63
 64 #include <linux/kernel.h>
 65 #include <linux/sched.h>
 66 #include <linux/string.h>
 67 #include <linux/ptrace.h>
 68 #include <linux/errno.h>
 69 #include <linux/ioport.h>
 70 #include <linux/malloc.h>
 71 #include <linux/interrupt.h>
 72 #include <linux/delay.h>
 73 #include <linux/init.h>
 74 #include <asm/bitops.h>
 75 #include <asm/io.h>
 76 #include <asm/dma.h>
 77
 78 #include <linux/netdevice.h>
 79 #include <linux/etherdevice.h>
 80 #include <linux/skbuff.h>
 81
 82 #include <linux/version.h>
 83 #include <linux/module.h>
 84
 85 #include"ni65.h"
 86
 87 /*
 88  * the current setting allows an acceptable performance
 89  * for 'RCV_PARANOIA_CHECK' read the 'known problems' part in
 90  * the header of this file
 91  * 'invert' the defines for max. performance. This may cause DMA problems
 92  * on some boards (e.g on my ASUS SP3G)
 93  */
 94 #undef XMT_VIA_SKB
 95 #undef RCV_VIA_SKB
 96 #define RCV_PARANOIA_CHECK
 97
 98 #define MID_PERFORMANCE
 99
 100 #if defined( LOW_PERFORMANCE )
 101 static int isa0=7,isa1=7,csr80=0x0c10;
 102 #elif defined( MID_PERFORMANCE )
 103 static int isa0=5,isa1=5,csr80=0x2810;
 104 #else/* high performance */
 105 static int isa0=4,isa1=4,csr80=0x0017;
 106 #endif
 107
 108 /*
 109  * a few card/vendor specific defines
 110  */
 111 #define NI65_ID0 0x00
 112 #define NI65_ID1 0x55
 113 #define NI65_EB_ID0 0x52
 114 #define NI65_EB_ID1 0x44
 115 #define NE2100_ID0 0x57
 116 #define NE2100_ID1 0x57
 117
 118 #define PORT p->cmdr_addr
 119
 120 /*
 121  * buffer configuration
 122  */
 123 #if 1
 124 #define RMDNUM 16
 125 #define RMDNUMMASK 0x80000000
 126 #else
 127 #define RMDNUM 8
 128 #define RMDNUMMASK 0x60000000/* log2(RMDNUM)<<29 */
 129 #endif
 130
 131 #if 0
 132 #define TMDNUM 1
 133 #define TMDNUMMASK 0x00000000
 134 #else
 135 #define TMDNUM 4
 136 #define TMDNUMMASK 0x40000000/* log2(TMDNUM)<<29 */
 137 #endif
 138
 139 /* slightly oversized */
 140 #define R_BUF_SIZE 1544
 141 #define T_BUF_SIZE 1544
 142
 143 /*
 144  * lance register defines
 145  */
 146 #define L_DATAREG 0x00
 147 #define L_ADDRREG 0x02
 148 #define L_RESET 0x04
 149 #define L_CONFIG 0x05
 150 #define L_BUSIF 0x06
 151
 152 /*
 153  * to access the lance/am7990-regs, you have to write
 154  * reg-number into L_ADDRREG, then you can access it using L_DATAREG
 155  */
 156 #define CSR0 0x00
 157 #define CSR1 0x01
 158 #define CSR2 0x02
 159 #define CSR3 0x03
 160
 161 #define INIT_RING_BEFORE_START 0x1
 162 #define FULL_RESET_ON_ERROR 0x2
 163
 164 #if 0
 165 #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);inw(PORT+L_ADDRREG); \
 166  outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
 167 #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_ADDRREG),\
 168  inw(PORT+L_DATAREG))
 169 #if 0
 170 #define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
 171 #else
 172 #define writedatareg(val) { writereg(val,CSR0); }
 173 #endif
 174 #else
 175 #define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);outw(val,PORT+L_DATAREG);}
 176 #define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_DATAREG))
 177 #define writedatareg(val) { writereg(val,CSR0); }
 178 #endif
 179
 180 static unsigned char ni_vendor[] = {0x02,0x07,0x01};
 181
 182 static struct card {
 183 unsigned char id0,id1;
 184 short id_offset;
 185 short total_size;
 186 short cmd_offset;
 187 short addr_offset;
 188 unsigned char*vendor_id;
 189 char*cardname;
 190 unsigned char config;
 191 } cards[] = {
 192 { NI65_ID0,NI65_ID1,0x0e,0x10,0x0,0x8,ni_vendor,"ni6510",0x1} ,
 193 { NI65_EB_ID0,NI65_EB_ID1,0x0e,0x18,0x10,0x0,ni_vendor,"ni6510 EtherBlaster",0x2} ,
 194 { NE2100_ID0,NE2100_ID1,0x0e,0x18,0x10,0x0,NULL,"generic NE2100",0x0}
 195 };
 196 #define NUM_CARDS 3
 197
 198 struct priv
 199 {
 200 struct rmd rmdhead[RMDNUM];
 201 struct tmd tmdhead[TMDNUM];
 202 struct init_block ib;
 203 int rmdnum;
 204 int tmdnum,tmdlast;
 205 #ifdef RCV_VIA_SKB
 206 struct sk_buff *recv_skb[RMDNUM];
 207 #else
 208 void*recvbounce[RMDNUM];
 209 #endif
 210 #ifdef XMT_VIA_SKB
 211 struct sk_buff *tmd_skb[TMDNUM];
 212 #endif
 213 void*tmdbounce[TMDNUM];
 214 int tmdbouncenum;
 215 int lock,xmit_queued;
 216 struct net_device_stats stats;
 217 void*self;
 218 int cmdr_addr;
 219 int cardno;
 220 int features;
 221 };
 222
 223 static intni65_probe1(struct net_device *dev,int);
 224 static voidni65_interrupt(int irq,void* dev_id,struct pt_regs *regs);
 225 static voidni65_recv_intr(struct net_device *dev,int);
 226 static voidni65_xmit_intr(struct net_device *dev,int);
 227 static intni65_open(struct net_device *dev);
 228 static intni65_lance_reinit(struct net_device *dev);
 229 static voidni65_init_lance(struct priv *p,unsigned char*,int,int);
 230 static intni65_send_packet(struct sk_buff *skb,struct net_device *dev);
 231 static voidni65_timeout(struct net_device *dev);
 232 static intni65_close(struct net_device *dev);
 233 static intni65_alloc_buffer(struct net_device *dev);
 234 static voidni65_free_buffer(struct priv *p);
 235 static struct net_device_stats *ni65_get_stats(struct net_device *);
 236 static voidset_multicast_list(struct net_device *dev);
 237
 238 static int irqtab[] __initdata = {9,12,15,5};/* irq config-translate */
 239 static int dmatab[] __initdata = {0,3,5,6,7};/* dma config-translate and autodetect */
 240
 241 static int debuglevel =1;
 242
 243 /*
 244  * set 'performance' registers .. we must STOP lance for that
 245  */
 246 static voidni65_set_performance(struct priv *p)
 247 {
 248 writereg(CSR0_STOP | CSR0_CLRALL,CSR0);/* STOP */
 249
 250 if( !(cards[p->cardno].config &0x02) )
 251 return;
 252
 253 outw(80,PORT+L_ADDRREG);
 254 if(inw(PORT+L_ADDRREG) !=80)
 255 return;
 256
 257 writereg( (csr80 &0x3fff) ,80);/* FIFO watermarks */
 258 outw(0,PORT+L_ADDRREG);
 259 outw((short)isa0,PORT+L_BUSIF);/* write ISA 0: DMA_R : isa0 * 50ns */
 260 outw(1,PORT+L_ADDRREG);
 261 outw((short)isa1,PORT+L_BUSIF);/* write ISA 1: DMA_W : isa1 * 50ns */
 262
 263 outw(CSR0,PORT+L_ADDRREG);/* switch back to CSR0 */
 264 }
 265
 266 /*
 267  * open interface (up)
 268  */
 269 static intni65_open(struct net_device *dev)
 270 {
 271 struct priv *p = (struct priv *) dev->priv;
 272 int irqval =request_irq(dev->irq, &ni65_interrupt,0,
 273  cards[p->cardno].cardname,dev);
 274 if(irqval) {
 275 printk("%s: unable to get IRQ %d (irqval=%d).\n",
 276  dev->name,dev->irq, irqval);
 277 return-EAGAIN;
 278 }
 279
 280 if(ni65_lance_reinit(dev))
 281 {
 282 netif_start_queue(dev);
 283  MOD_INC_USE_COUNT;
 284 return0;
 285 }
 286 else
 287 {
 288 free_irq(dev->irq,dev);
 289 return-EAGAIN;
 290 }
 291 }
 292
 293 /*
 294  * close interface (down)
 295  */
 296 static intni65_close(struct net_device *dev)
 297 {
 298 struct priv *p = (struct priv *) dev->priv;
 299
 300 netif_stop_queue(dev);
 301
 302 outw(inw(PORT+L_RESET),PORT+L_RESET);/* that's the hard way */
 303
 304 #ifdef XMT_VIA_SKB
 305 {
 306 int i;
 307 for(i=0;i<TMDNUM;i++)
 308 {
 309 if(p->tmd_skb[i]) {
 310 dev_kfree_skb(p->tmd_skb[i]);
 311  p->tmd_skb[i] = NULL;
 312 }
 313 }
 314 }
 315 #endif
 316 free_irq(dev->irq,dev);
 317  MOD_DEC_USE_COUNT;
 318 return0;
 319 }
 320
 321 /*
 322  * Probe The Card (not the lance-chip)
 323  */
 324 #ifdef MODULE
 325 static
 326 #endif
 327 int __init ni65_probe(struct net_device *dev)
 328 {
 329 int*port;
 330 static int ports[] = {0x360,0x300,0x320,0x340,0};
 331
 332 if(dev->base_addr >0x1ff)/* Check a single specified location. */
 333 returnni65_probe1(dev, dev->base_addr);
 334 else if(dev->base_addr >0)/* Don't probe at all. */
 335 return-ENXIO;
 336
 337 for(port = ports; *port; port++)
 338 {
 339 if(ni65_probe1(dev, *port) ==0)
 340 return0;
 341 }
 342
 343 return-ENODEV;
 344 }
 345
 346 /*
 347  * this is the real card probe ..
 348  */
 349 static int __init ni65_probe1(struct net_device *dev,int ioaddr)
 350 {
 351 int i,j;
 352 struct priv *p;
 353 unsigned long flags;
 354
 355 for(i=0;i<NUM_CARDS;i++) {
 356 if(check_region(ioaddr, cards[i].total_size))
 357 continue;
 358 if(cards[i].id_offset >=0) {
 359 if(inb(ioaddr+cards[i].id_offset+0) != cards[i].id0 ||
 360 inb(ioaddr+cards[i].id_offset+1) != cards[i].id1) {
 361 continue;
 362 }
 363 }
 364 if(cards[i].vendor_id) {
 365 for(j=0;j<3;j++)
 366 if(inb(ioaddr+cards[i].addr_offset+j) != cards[i].vendor_id[j])
 367 continue;
 368 }
 369 break;
 370 }
 371 if(i == NUM_CARDS)
 372 return-ENODEV;
 373
 374 for(j=0;j<6;j++)
 375  dev->dev_addr[j] =inb(ioaddr+cards[i].addr_offset+j);
 376
 377 if( (j=ni65_alloc_buffer(dev)) <0)
 378 return j;
 379  p = (struct priv *) dev->priv;
 380  p->cmdr_addr = ioaddr + cards[i].cmd_offset;
 381  p->cardno = i;
 382
 383 printk("%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr);
 384
 385 outw(inw(PORT+L_RESET),PORT+L_RESET);/* first: reset the card */
 386 if( (j=readreg(CSR0)) !=0x4) {
 387 printk(KERN_ERR "can't RESET card: %04x\n",j);
 388 ni65_free_buffer(p);
 389 return-EAGAIN;
 390 }
 391
 392 outw(88,PORT+L_ADDRREG);
 393 if(inw(PORT+L_ADDRREG) ==88) {
 394 unsigned long v;
 395  v =inw(PORT+L_DATAREG);
 396  v <<=16;
 397 outw(89,PORT+L_ADDRREG);
 398  v |=inw(PORT+L_DATAREG);
 399 printk("Version %#08lx, ",v);
 400  p->features = INIT_RING_BEFORE_START;
 401 }
 402 else{
 403 printk("ancient LANCE, ");
 404  p->features =0x0;
 405 }
 406
 407 if(test_bit(0,&cards[i].config)) {
 408  dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3];
 409  dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3];
 410 printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma);
 411 }
 412 else{
 413 if(dev->dma ==0) {
 414 /* 'stuck test' from lance.c */
 415 int dma_channels = ((inb(DMA1_STAT_REG) >>4) &0x0f) | (inb(DMA2_STAT_REG) &0xf0);
 416 for(i=1;i<5;i++) {
 417 int dma = dmatab[i];
 418 if(test_bit(dma,&dma_channels) ||request_dma(dma,"ni6510"))
 419 continue;
 420
 421  flags=claim_dma_lock();
 422 disable_dma(dma);
 423 set_dma_mode(dma,DMA_MODE_CASCADE);
 424 enable_dma(dma);
 425 release_dma_lock(flags);
 426
 427 ni65_init_lance(p,dev->dev_addr,0,0);/* trigger memory access */
 428
 429  flags=claim_dma_lock();
 430 disable_dma(dma);
 431 free_dma(dma);
 432 release_dma_lock(flags);
 433
 434 if(readreg(CSR0) & CSR0_IDON)
 435 break;
 436 }
 437 if(i ==5) {
 438 printk("Can't detect DMA channel!\n");
 439 ni65_free_buffer(p);
 440 return-EAGAIN;
 441 }
 442  dev->dma = dmatab[i];
 443 printk("DMA %d (autodetected), ",dev->dma);
 444 }
 445 else
 446 printk("DMA %d (assigned), ",dev->dma);
 447
 448 if(dev->irq <2)
 449 {
 450 ni65_init_lance(p,dev->dev_addr,0,0);
 451 autoirq_setup(0);
 452 writereg(CSR0_INIT|CSR0_INEA,CSR0);/* trigger interrupt */
 453
 454 if(!(dev->irq =autoirq_report(2)))
 455 {
 456 printk("Failed to detect IRQ line!\n");
 457 ni65_free_buffer(p);
 458 return-EAGAIN;
 459 }
 460 printk("IRQ %d (autodetected).\n",dev->irq);
 461 }
 462 else
 463 printk("IRQ %d (assigned).\n",dev->irq);
 464 }
 465
 466 if(request_dma(dev->dma, cards[p->cardno].cardname ) !=0)
 467 {
 468 printk("%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
 469 ni65_free_buffer(p);
 470 return-EAGAIN;
 471 }
 472
 473 /*
 474  * Grab the region so we can find another board.
 475  */
 476 request_region(ioaddr,cards[p->cardno].total_size,cards[p->cardno].cardname);
 477
 478  dev->base_addr = ioaddr;
 479
 480  dev->open = ni65_open;
 481  dev->stop = ni65_close;
 482  dev->hard_start_xmit = ni65_send_packet;
 483  dev->tx_timeout = ni65_timeout;
 484  dev->watchdog_timeo = HZ/2;
 485  dev->get_stats = ni65_get_stats;
 486  dev->set_multicast_list = set_multicast_list;
 487
 488 ether_setup(dev);
 489
 490 return0;/* everything is OK */
 491 }
 492
 493 /*
 494  * set lance register and trigger init
 495  */
 496 static voidni65_init_lance(struct priv *p,unsigned char*daddr,int filter,int mode)
 497 {
 498 int i;
 499  u32 pib;
 500
 501 writereg(CSR0_CLRALL|CSR0_STOP,CSR0);
 502
 503 for(i=0;i<6;i++)
 504  p->ib.eaddr[i] = daddr[i];
 505
 506 for(i=0;i<8;i++)
 507  p->ib.filter[i] = filter;
 508  p->ib.mode = mode;
 509
 510  p->ib.trp = (u32)virt_to_bus(p->tmdhead) | TMDNUMMASK;
 511  p->ib.rrp = (u32)virt_to_bus(p->rmdhead) | RMDNUMMASK;
 512 writereg(0,CSR3);/* busmaster/no word-swap */
 513  pib = (u32)virt_to_bus(&p->ib);
 514 writereg(pib &0xffff,CSR1);
 515 writereg(pib >>16,CSR2);
 516
 517 writereg(CSR0_INIT,CSR0);/* this changes L_ADDRREG to CSR0 */
 518
 519 for(i=0;i<32;i++)
 520 {
 521 mdelay(4);
 522 if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) )
 523 break;/* init ok ? */
 524 }
 525 }
 526
 527 /*
 528  * allocate memory area and check the 16MB border
 529  */
 530 static void*ni65_alloc_mem(struct net_device *dev,char*what,int size,int type)
 531 {
 532 struct sk_buff *skb=NULL;
 533 unsigned char*ptr;
 534 void*ret;
 535
 536 if(type) {
 537  ret = skb =alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA);
 538 if(!skb) {
 539 printk("%s: unable to allocate %s memory.\n",dev->name,what);
 540 return NULL;
 541 }
 542  skb->dev = dev;
 543 skb_reserve(skb,2+16);
 544 skb_put(skb,R_BUF_SIZE);/* grab the whole space .. (not necessary) */
 545  ptr = skb->data;
 546 }
 547 else{
 548  ret = ptr =kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA);
 549 if(!ret) {
 550 printk("%s: unable to allocate %s memory.\n",dev->name,what);
 551 return NULL;
 552 }
 553 }
 554 if( (u32)virt_to_bus(ptr+size) >0x1000000) {
 555 printk("%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
 556 if(type)
 557 kfree_skb(skb);
 558 else
 559 kfree(ptr);
 560 return NULL;
 561 }
 562 return ret;
 563 }
 564
 565 /*
 566  * allocate all memory structures .. send/recv buffers etc ...
 567  */
 568 static intni65_alloc_buffer(struct net_device *dev)
 569 {
 570 unsigned char*ptr;
 571 struct priv *p;
 572 int i;
 573
 574 /*
 575  * we need 8-aligned memory ..
 576  */
 577  ptr =ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0);
 578 if(!ptr)
 579 return-ENOMEM;
 580
 581  p = dev->priv = (struct priv *) (((unsigned long) ptr +7) & ~0x7);
 582 memset((char*) dev->priv,0,sizeof(struct priv));
 583  p->self = ptr;
 584
 585 for(i=0;i<TMDNUM;i++)
 586 {
 587 #ifdef XMT_VIA_SKB
 588  p->tmd_skb[i] = NULL;
 589 #endif
 590  p->tmdbounce[i] =ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0);
 591 if(!p->tmdbounce[i]) {
 592 ni65_free_buffer(p);
 593 return-ENOMEM;
 594 }
 595 }
 596
 597 for(i=0;i<RMDNUM;i++)
 598 {
 599 #ifdef RCV_VIA_SKB
 600  p->recv_skb[i] =ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1);
 601 if(!p->recv_skb[i]) {
 602 ni65_free_buffer(p);
 603 return-ENOMEM;
 604 }
 605 #else
 606  p->recvbounce[i] =ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0);
 607 if(!p->recvbounce[i]) {
 608 ni65_free_buffer(p);
 609 return-ENOMEM;
 610 }
 611 #endif
 612 }
 613
 614 return0;/* everything is OK */
 615 }
 616
 617 /*
 618  * free buffers and private struct
 619  */
 620 static voidni65_free_buffer(struct priv *p)
 621 {
 622 int i;
 623
 624 if(!p)
 625 return;
 626
 627 for(i=0;i<TMDNUM;i++) {
 628 if(p->tmdbounce[i])
 629 kfree(p->tmdbounce[i]);
 630 #ifdef XMT_VIA_SKB
 631 if(p->tmd_skb[i])
 632 dev_kfree_skb(p->tmd_skb[i]);
 633 #endif
 634 }
 635
 636 for(i=0;i<RMDNUM;i++)
 637 {
 638 #ifdef RCV_VIA_SKB
 639 if(p->recv_skb[i])
 640 dev_kfree_skb(p->recv_skb[i]);
 641 #else
 642 if(p->recvbounce[i])
 643 kfree(p->recvbounce[i]);
 644 #endif
 645 }
 646 if(p->self)
 647 kfree(p->self);
 648 }
 649
 650
 651 /*
 652  * stop and (re)start lance .. e.g after an error
 653  */
 654 static voidni65_stop_start(struct net_device *dev,struct priv *p)
 655 {
 656 int csr0 = CSR0_INEA;
 657
 658 writedatareg(CSR0_STOP);
 659
 660 if(debuglevel >1)
 661 printk("ni65_stop_start\n");
 662
 663 if(p->features & INIT_RING_BEFORE_START) {
 664 int i;
 665 #ifdef XMT_VIA_SKB
 666 struct sk_buff *skb_save[TMDNUM];
 667 #endif
 668 unsigned long buffer[TMDNUM];
 669 short blen[TMDNUM];
 670
 671 if(p->xmit_queued) {
 672 while(1) {
 673 if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN))
 674 break;
 675  p->tmdlast = (p->tmdlast +1) & (TMDNUM-1);
 676 if(p->tmdlast == p->tmdnum)
 677 break;
 678 }
 679 }
 680
 681 for(i=0;i<TMDNUM;i++) {
 682 struct tmd *tmdp = p->tmdhead + i;
 683 #ifdef XMT_VIA_SKB
 684  skb_save[i] = p->tmd_skb[i];
 685 #endif
 686  buffer[i] = (u32)bus_to_virt(tmdp->u.buffer);
 687  blen[i] = tmdp->blen;
 688  tmdp->u.s.status =0x0;
 689 }
 690
 691 for(i=0;i<RMDNUM;i++) {
 692 struct rmd *rmdp = p->rmdhead + i;
 693  rmdp->u.s.status = RCV_OWN;
 694 }
 695  p->tmdnum = p->xmit_queued =0;
 696 writedatareg(CSR0_STRT | csr0);
 697
 698 for(i=0;i<TMDNUM;i++) {
 699 int num = (i + p->tmdlast) & (TMDNUM-1);
 700  p->tmdhead[i].u.buffer = (u32)virt_to_bus((char*)buffer[num]);/* status is part of buffer field */
 701  p->tmdhead[i].blen = blen[num];
 702 if(p->tmdhead[i].u.s.status & XMIT_OWN) {
 703  p->tmdnum = (p->tmdnum +1) & (TMDNUM-1);
 704  p->xmit_queued =1;
 705 writedatareg(CSR0_TDMD | CSR0_INEA | csr0);
 706 }
 707 #ifdef XMT_VIA_SKB
 708  p->tmd_skb[i] = skb_save[num];
 709 #endif
 710 }
 711  p->rmdnum = p->tmdlast =0;
 712 if(!p->lock)
 713 if(p->tmdnum || !p->xmit_queued)
 714 netif_wake_queue(dev);
 715  dev->trans_start = jiffies;
 716 }
 717 else
 718 writedatareg(CSR0_STRT | csr0);
 719 }
 720
 721 /*
 722  * init lance (write init-values .. init-buffers) (open-helper)
 723  */
 724 static intni65_lance_reinit(struct net_device *dev)
 725 {
 726 int i;
 727 struct priv *p = (struct priv *) dev->priv;
 728 unsigned long flags;
 729
 730  p->lock =0;
 731  p->xmit_queued =0;
 732
 733  flags=claim_dma_lock();
 734 disable_dma(dev->dma);/* I've never worked with dma, but we do it like the packetdriver */
 735 set_dma_mode(dev->dma,DMA_MODE_CASCADE);
 736 enable_dma(dev->dma);
 737 release_dma_lock(flags);
 738
 739 outw(inw(PORT+L_RESET),PORT+L_RESET);/* first: reset the card */
 740 if( (i=readreg(CSR0) ) !=0x4)
 741 {
 742 printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name,
 743  cards[p->cardno].cardname,(int) i);
 744  flags=claim_dma_lock();
 745 disable_dma(dev->dma);
 746 release_dma_lock(flags);
 747 return0;
 748 }
 749
 750  p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum =0;
 751 for(i=0;i<TMDNUM;i++)
 752 {
 753 struct tmd *tmdp = p->tmdhead + i;
 754 #ifdef XMT_VIA_SKB
 755 if(p->tmd_skb[i]) {
 756 dev_kfree_skb(p->tmd_skb[i]);
 757  p->tmd_skb[i] = NULL;
 758 }
 759 #endif
 760  tmdp->u.buffer =0x0;
 761  tmdp->u.s.status = XMIT_START | XMIT_END;
 762  tmdp->blen = tmdp->status2 =0;
 763 }
 764
 765 for(i=0;i<RMDNUM;i++)
 766 {
 767 struct rmd *rmdp = p->rmdhead + i;
 768 #ifdef RCV_VIA_SKB
 769  rmdp->u.buffer = (u32)virt_to_bus(p->recv_skb[i]->data);
 770 #else
 771  rmdp->u.buffer = (u32)virt_to_bus(p->recvbounce[i]);
 772 #endif
 773  rmdp->blen = -(R_BUF_SIZE-8);
 774  rmdp->mlen =0;
 775  rmdp->u.s.status = RCV_OWN;
 776 }
 777
 778 if(dev->flags & IFF_PROMISC)
 779 ni65_init_lance(p,dev->dev_addr,0x00,M_PROM);
 780 else if(dev->mc_count || dev->flags & IFF_ALLMULTI)
 781 ni65_init_lance(p,dev->dev_addr,0xff,0x0);
 782 else
 783 ni65_init_lance(p,dev->dev_addr,0x00,0x00);
 784
 785 /*
 786  * ni65_set_lance_mem() sets L_ADDRREG to CSR0
 787  * NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED
 788  */
 789
 790 if(inw(PORT+L_DATAREG) & CSR0_IDON) {
 791 ni65_set_performance(p);
 792 /* init OK: start lance , enable interrupts */
 793 writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT);
 794 return1;/* ->OK */
 795 }
 796 printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int)inw(PORT+L_DATAREG));
 797  flags=claim_dma_lock();
 798 disable_dma(dev->dma);
 799 release_dma_lock(flags);
 800 return0;/* ->Error */
 801 }
 802
 803 /*
 804  * interrupt handler
 805  */
 806 static voidni65_interrupt(int irq,void* dev_id,struct pt_regs * regs)
 807 {
 808 int csr0 =0;
 809 struct net_device *dev = dev_id;
 810 struct priv *p;
 811 int bcnt =32;
 812
 813  p = (struct priv *) dev->priv;
 814
 815 while(--bcnt) {
 816  csr0 =inw(PORT+L_DATAREG);
 817
 818 #if 0
 819 writedatareg( (csr0 & CSR0_CLRALL) );/* ack interrupts, disable int. */
 820 #else
 821 writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA );/* ack interrupts, interrupts enabled */
 822 #endif
 823
 824 if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT)))
 825 break;
 826
 827 if(csr0 & CSR0_RINT)/* RECV-int? */
 828 ni65_recv_intr(dev,csr0);
 829 if(csr0 & CSR0_TINT)/* XMIT-int? */
 830 ni65_xmit_intr(dev,csr0);
 831
 832 if(csr0 & CSR0_ERR)
 833 {
 834 struct priv *p = (struct priv *) dev->priv;
 835 if(debuglevel >1)
 836 printk("%s: general error: %04x.\n",dev->name,csr0);
 837 if(csr0 & CSR0_BABL)
 838  p->stats.tx_errors++;
 839 if(csr0 & CSR0_MISS) {
 840 int i;
 841 for(i=0;i<RMDNUM;i++)
 842 printk("%02x ",p->rmdhead[i].u.s.status);
 843 printk("\n");
 844  p->stats.rx_errors++;
 845 }
 846 if(csr0 & CSR0_MERR) {
 847 if(debuglevel >1)
 848 printk("%s: Ooops .. memory error: %04x.\n",dev->name,csr0);
 849 ni65_stop_start(dev,p);
 850 }
 851 }
 852 }
 853
 854 #ifdef RCV_PARANOIA_CHECK
 855 {
 856 int j;
 857 for(j=0;j<RMDNUM;j++)
 858 {
 859 struct priv *p = (struct priv *) dev->priv;
 860 int i,k,num1,num2;
 861 for(i=RMDNUM-1;i>0;i--) {
 862  num2 = (p->rmdnum + i) & (RMDNUM-1);
 863 if(!(p->rmdhead[num2].u.s.status & RCV_OWN))
 864 break;
 865 }
 866
 867 if(i) {
 868 for(k=0;k<RMDNUM;k++) {
 869  num1 = (p->rmdnum + k) & (RMDNUM-1);
 870 if(!(p->rmdhead[num1].u.s.status & RCV_OWN))
 871 break;
 872 }
 873 if(!k)
 874 break;
 875
 876 if(debuglevel >0)
 877 {
 878 char buf[256],*buf1;
 879 int k;
 880  buf1 = buf;
 881 for(k=0;k<RMDNUM;k++) {
 882 sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status));/* & RCV_OWN) ); */
 883  buf1 +=3;
 884 }
 885 *buf1 =0;
 886 printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf);
 887 }
 888
 889  p->rmdnum = num1;
 890 ni65_recv_intr(dev,csr0);
 891 if((p->rmdhead[num2].u.s.status & RCV_OWN))
 892 break;/* ok, we are 'in sync' again */
 893 }
 894 else
 895 break;
 896 }
 897 }
 898 #endif
 899
 900 if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) {
 901 printk("%s: RX or TX was offline -> restart\n",dev->name);
 902 ni65_stop_start(dev,p);
 903 }
 904 else
 905 writedatareg(CSR0_INEA);
 906
 907 return;
 908 }
 909
 910 /*
 911  * We have received an Xmit-Interrupt ..
 912  * send a new packet if necessary
 913  */
 914 static voidni65_xmit_intr(struct net_device *dev,int csr0)
 915 {
 916 struct priv *p = (struct priv *) dev->priv;
 917
 918 while(p->xmit_queued)
 919 {
 920 struct tmd *tmdp = p->tmdhead + p->tmdlast;
 921 int tmdstat = tmdp->u.s.status;
 922
 923 if(tmdstat & XMIT_OWN)
 924 break;
 925
 926 if(tmdstat & XMIT_ERR)
 927 {
 928 #if 0
 929 if(tmdp->status2 & XMIT_TDRMASK && debuglevel >3)
 930 printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name);
 931 #endif
 932 /* checking some errors */
 933 if(tmdp->status2 & XMIT_RTRY)
 934  p->stats.tx_aborted_errors++;
 935 if(tmdp->status2 & XMIT_LCAR)
 936  p->stats.tx_carrier_errors++;
 937 if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) {
 938 /* this stops the xmitter */
 939  p->stats.tx_fifo_errors++;
 940 if(debuglevel >0)
 941 printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name);
 942 if(p->features & INIT_RING_BEFORE_START) {
 943  tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;/* test: resend this frame */
 944 ni65_stop_start(dev,p);
 945 break;/* no more Xmit processing .. */
 946 }
 947 else
 948 ni65_stop_start(dev,p);
 949 }
 950 if(debuglevel >2)
 951 printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2);
 952 if(!(csr0 & CSR0_BABL))/* don't count errors twice */
 953  p->stats.tx_errors++;
 954  tmdp->status2 =0;
 955 }
 956 else{
 957  p->stats.tx_bytes -= (short)(tmdp->blen);
 958  p->stats.tx_packets++;
 959 }
 960
 961 #ifdef XMT_VIA_SKB
 962 if(p->tmd_skb[p->tmdlast]) {
 963 dev_kfree_skb_irq(p->tmd_skb[p->tmdlast]);
 964  p->tmd_skb[p->tmdlast] = NULL;
 965 }
 966 #endif
 967
 968  p->tmdlast = (p->tmdlast +1) & (TMDNUM-1);
 969 if(p->tmdlast == p->tmdnum)
 970  p->xmit_queued =0;
 971 }
 972 netif_wake_queue(dev);
 973 }
 974
 975 /*
 976  * We have received a packet
 977  */
 978 static voidni65_recv_intr(struct net_device *dev,int csr0)
 979 {
 980 struct rmd *rmdp;
 981 int rmdstat,len;
 982 int cnt=0;
 983 struct priv *p = (struct priv *) dev->priv;
 984
 985  rmdp = p->rmdhead + p->rmdnum;
 986 while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
 987 {
 988  cnt++;
 989 if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) )/* error or oversized? */
 990 {
 991 if(!(rmdstat & RCV_ERR)) {
 992 if(rmdstat & RCV_START)
 993 {
 994  p->stats.rx_length_errors++;
 995 printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen &0x0fff);
 996 }
 997 }
 998 else{
 999 if(debuglevel >2)
1000 printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n",
1001  dev->name,(int) rmdstat,csr0,(int)inw(PORT+L_DATAREG) );
1002 if(rmdstat & RCV_FRAM)
1003  p->stats.rx_frame_errors++;
1004 if(rmdstat & RCV_OFLO)
1005  p->stats.rx_over_errors++;
1006 if(rmdstat & RCV_CRC)
1007  p->stats.rx_crc_errors++;
1008 if(rmdstat & RCV_BUF_ERR)
1009  p->stats.rx_fifo_errors++;
1010 }
1011 if(!(csr0 & CSR0_MISS))/* don't count errors twice */
1012  p->stats.rx_errors++;
1013 }
1014 else if( (len = (rmdp->mlen &0x0fff) -4) >=60)
1015 {
1016 #ifdef RCV_VIA_SKB
1017 struct sk_buff *skb =alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC);
1018 if(skb)
1019 skb_reserve(skb,16);
1020 #else
1021 struct sk_buff *skb =dev_alloc_skb(len+2);
1022 #endif
1023 if(skb)
1024 {
1025 skb_reserve(skb,2);
1026  skb->dev = dev;
1027 #ifdef RCV_VIA_SKB
1028 if( (unsigned long) (skb->data + R_BUF_SIZE) >0x1000000) {
1029 skb_put(skb,len);
1030 eth_copy_and_sum(skb, (unsigned char*)(p->recv_skb[p->rmdnum]->data),len,0);
1031 }
1032 else{
1033 struct sk_buff *skb1 = p->recv_skb[p->rmdnum];
1034 skb_put(skb,R_BUF_SIZE);
1035  p->recv_skb[p->rmdnum] = skb;
1036  rmdp->u.buffer = (u32)virt_to_bus(skb->data);
1037  skb = skb1;
1038 skb_trim(skb,len);
1039 }
1040 #else
1041 skb_put(skb,len);
1042 eth_copy_and_sum(skb, (unsigned char*) p->recvbounce[p->rmdnum],len,0);
1043 #endif
1044  p->stats.rx_packets++;
1045  p->stats.rx_bytes += len;
1046  skb->protocol=eth_type_trans(skb,dev);
1047 netif_rx(skb);
1048 }
1049 else
1050 {
1051 printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name);
1052  p->stats.rx_dropped++;
1053 }
1054 }
1055 else{
1056 printk(KERN_INFO "%s: received runt packet\n",dev->name);
1057  p->stats.rx_errors++;
1058 }
1059  rmdp->blen = -(R_BUF_SIZE-8);
1060  rmdp->mlen =0;
1061  rmdp->u.s.status = RCV_OWN;/* change owner */
1062  p->rmdnum = (p->rmdnum +1) & (RMDNUM-1);
1063  rmdp = p->rmdhead + p->rmdnum;
1064 }
1065 }
1066
1067 /*
1068  * kick xmitter ..
1069  */
1070
1071 static voidni65_timeout(struct net_device *dev)
1072 {
1073 int i;
1074 struct priv *p = (struct priv *) dev->priv;
1075
1076 printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
1077 for(i=0;i<TMDNUM;i++)
1078 printk("%02x ",p->tmdhead[i].u.s.status);
1079 printk("\n");
1080 ni65_lance_reinit(dev);
1081  dev->trans_start = jiffies;
1082 netif_wake_queue(dev);
1083 }
1084
1085 /*
1086  * Send a packet
1087  */
1088
1089 static intni65_send_packet(struct sk_buff *skb,struct net_device *dev)
1090 {
1091 struct priv *p = (struct priv *) dev->priv;
1092
1093 netif_stop_queue(dev);
1094
1095 if(test_and_set_bit(0, (void*)&p->lock)) {
1096 printk(KERN_ERR "%s: Queue was locked.\n", dev->name);
1097 return1;
1098 }
1099
1100 {
1101 short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
1102 struct tmd *tmdp;
1103 long flags;
1104
1105 #ifdef XMT_VIA_SKB
1106 if( (unsigned long) (skb->data + skb->len) >0x1000000) {
1107 #endif
1108
1109 memcpy((char*) p->tmdbounce[p->tmdbouncenum] ,(char*)skb->data,
1110 (skb->len > T_BUF_SIZE) ? T_BUF_SIZE : skb->len);
1111 dev_kfree_skb(skb);
1112
1113 save_flags(flags);
1114 cli();
1115
1116  tmdp = p->tmdhead + p->tmdnum;
1117  tmdp->u.buffer = (u32)virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
1118  p->tmdbouncenum = (p->tmdbouncenum +1) & (TMDNUM -1);
1119
1120 #ifdef XMT_VIA_SKB
1121 }
1122 else{
1123 save_flags(flags);
1124 cli();
1125
1126  tmdp = p->tmdhead + p->tmdnum;
1127  tmdp->u.buffer = (u32)virt_to_bus(skb->data);
1128  p->tmd_skb[p->tmdnum] = skb;
1129 }
1130 #endif
1131  tmdp->blen = -len;
1132
1133  tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
1134 writedatareg(CSR0_TDMD | CSR0_INEA);/* enable xmit & interrupt */
1135
1136  p->xmit_queued =1;
1137  p->tmdnum = (p->tmdnum +1) & (TMDNUM-1);
1138
1139 if(p->tmdnum != p->tmdlast)
1140 netif_wake_queue(dev);
1141
1142  p->lock =0;
1143  dev->trans_start = jiffies;
1144
1145 restore_flags(flags);
1146 }
1147
1148 return0;
1149 }
1150
1151 static struct net_device_stats *ni65_get_stats(struct net_device *dev)
1152 {
1153
1154 #if 0
1155 int i;
1156 struct priv *p = (struct priv *) dev->priv;
1157 for(i=0;i<RMDNUM;i++)
1158 {
1159 struct rmd *rmdp = p->rmdhead + ((p->rmdnum + i) & (RMDNUM-1));
1160 printk("%02x ",rmdp->u.s.status);
1161 }
1162 printk("\n");
1163 #endif
1164
1165 return&((struct priv *) dev->priv)->stats;
1166 }
1167
1168 static voidset_multicast_list(struct net_device *dev)
1169 {
1170 if(!ni65_lance_reinit(dev))
1171 printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
1172 netif_wake_queue(dev);
1173 }
1174
1175 #ifdef MODULE
1176 static struct net_device dev_ni65 = {
1177 "",/* "ni6510": device name inserted by net_init.c */
1178 0,0,0,0,
1179 0x360,9,/* I/O address, IRQ */
1180 0,0,0, NULL, ni65_probe };
1181
1182 /* set: io,irq,dma or set it when calling insmod */
1183 static int irq=0;
1184 static int io=0;
1185 static int dma=0;
1186
1187 MODULE_PARM(irq,"i");
1188 MODULE_PARM(io,"i");
1189 MODULE_PARM(dma,"i");
1190
1191 intinit_module(void)
1192 {
1193  dev_ni65.irq = irq;
1194  dev_ni65.dma = dma;
1195  dev_ni65.base_addr = io;
1196 if(register_netdev(&dev_ni65) !=0)
1197 return-EIO;
1198 return0;
1199 }
1200
1201 voidcleanup_module(void)
1202 {
1203 struct priv *p;
1204  p = (struct priv *) dev_ni65.priv;
1205 if(!p) {
1206 printk("Ooops .. no private struct\n");
1207 return;
1208 }
1209 disable_dma(dev_ni65.dma);
1210 free_dma(dev_ni65.dma);
1211 unregister_netdev(&dev_ni65);
1212 release_region(dev_ni65.base_addr,cards[p->cardno].total_size);
1213 ni65_free_buffer(p);
1214  dev_ni65.priv = NULL;
1215 }
1216 #endif/* MODULE */
1217
1218 /*
1219  * END of ni65.c
1220  */