This source file includes following definitions.
- ei_open
- ei_start_xmit
- ei_interrupt
- ei_tx_intr
- ei_receive
- ei_rx_overrun
- get_stats
- set_multicast_list
- ethdev_init
- NS8390_init
- NS8390_trigger_send
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18 static char *version =
19 "8390.c:v0.99-15e 2/16/94 Donald Becker (becker@super.org)\n";
20 #include <linux/config.h>
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33
34 #include <linux/config.h>
35 #include <linux/kernel.h>
36 #include <linux/sched.h>
37 #include <linux/fs.h>
38 #include <linux/types.h>
39 #include <linux/ptrace.h>
40 #include <linux/string.h>
41 #include <asm/system.h>
42 #include <asm/segment.h>
43 #include <asm/bitops.h>
44 #include <asm/io.h>
45 #include <errno.h>
46 #include <linux/fcntl.h>
47 #include <linux/in.h>
48 #include <linux/interrupt.h>
49
50 #include <linux/netdevice.h>
51 #include <linux/etherdevice.h>
52 #include <linux/skbuff.h>
53
54 #include "8390.h"
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71
72 #define ei_reset_8390 (ei_local->reset_8390)
73 #define ei_block_output (ei_local->block_output)
74 #define ei_block_input (ei_local->block_input)
75
76
77 #ifdef EI_DEBUG
78 int ei_debug = EI_DEBUG;
79 #else
80 int ei_debug = 1;
81 #endif
82
83
84
85 static int high_water_mark = 0;
86
87
88 int ei_open(struct device *dev);
89 void ei_interrupt(int reg_ptr);
90
91 static void ei_tx_intr(struct device *dev);
92 static void ei_receive(struct device *dev);
93 static void ei_rx_overrun(struct device *dev);
94
95
96 void NS8390_init(struct device *dev, int startp);
97 static void NS8390_trigger_send(struct device *dev, unsigned int length,
98 int start_page);
99 #ifdef HAVE_MULTICAST
100 static void set_multicast_list(struct device *dev, int num_addrs, void *addrs);
101 #endif
102
103 struct sigaction ei_sigaction = { ei_interrupt, 0, 0, NULL, };
104
105
106
107
108
109 int ei_open(struct device *dev)
110 {
111 struct ei_device *ei_local = (struct ei_device *) dev->priv;
112
113 if ( ! ei_local) {
114 printk("%s: Opening a non-existent physical device\n", dev->name);
115 return ENXIO;
116 }
117
118 irq2dev_map[dev->irq] = dev;
119 NS8390_init(dev, 1);
120 dev->start = 1;
121 ei_local->irqlock = 0;
122 return 0;
123 }
124
125 static int ei_start_xmit(struct sk_buff *skb, struct device *dev)
126 {
127 int e8390_base = dev->base_addr;
128 struct ei_device *ei_local = (struct ei_device *) dev->priv;
129 int length, send_length;
130
131
132
133
134
135
136 if (dev->tbusy) {
137 int txsr = inb(e8390_base+EN0_TSR), isr;
138 int tickssofar = jiffies - dev->trans_start;
139 if (tickssofar < 10 || (tickssofar < 15 && ! (txsr & ENTSR_PTX))) {
140 return 1;
141 }
142 isr = inb(e8390_base+EN0_ISR);
143 printk(KERN_DEBUG "%s: transmit timed out, TX status %#2x, ISR %#2x.\n",
144 dev->name, txsr, isr);
145
146 if (isr)
147 printk(KERN_DEBUG "%s: Possible IRQ conflict on IRQ%d?\n", dev->name, dev->irq);
148 else {
149
150 printk(KERN_DEBUG "%s: Possible network cable problem?\n", dev->name);
151 if(ei_local->stat.tx_packets==0)
152 ei_local->interface_num ^= 1;
153 }
154
155 ei_reset_8390(dev);
156 NS8390_init(dev, 1);
157 dev->trans_start = jiffies;
158 }
159
160
161
162
163 if (skb == NULL) {
164 dev_tint(dev);
165 return 0;
166 }
167
168 length = skb->len;
169 if (skb->len <= 0)
170 return 0;
171
172
173 if (set_bit(0, (void*)&dev->tbusy) != 0) {
174 printk("%s: Transmitter access conflict.\n", dev->name);
175 return 1;
176 }
177
178
179 outb(0x00, e8390_base + EN0_IMR);
180 ei_local->irqlock = 1;
181
182 send_length = ETH_ZLEN < length ? length : ETH_ZLEN;
183
184 if (ei_local->pingpong) {
185 int output_page;
186 if (ei_local->tx1 == 0) {
187 output_page = ei_local->tx_start_page;
188 ei_local->tx1 = send_length;
189 if (ei_debug && ei_local->tx2 > 0)
190 printk("%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
191 dev->name, ei_local->tx2, ei_local->lasttx,
192 ei_local->txing);
193 } else if (ei_local->tx2 == 0) {
194 output_page = ei_local->tx_start_page + 6;
195 ei_local->tx2 = send_length;
196 if (ei_debug && ei_local->tx1 > 0)
197 printk("%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
198 dev->name, ei_local->tx1, ei_local->lasttx,
199 ei_local->txing);
200 } else {
201 if (ei_debug)
202 printk("%s: No packet buffer space for ping-pong use.\n",
203 dev->name);
204 ei_local->irqlock = 0;
205 dev->tbusy = 1;
206 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
207 return 1;
208 }
209 ei_block_output(dev, length, skb->data, output_page);
210 if (! ei_local->txing) {
211 NS8390_trigger_send(dev, send_length, output_page);
212 dev->trans_start = jiffies;
213 if (output_page == ei_local->tx_start_page)
214 ei_local->tx1 = -1, ei_local->lasttx = -1;
215 else
216 ei_local->tx2 = -1, ei_local->lasttx = -2;
217 ei_local->txing = 1;
218 } else
219 ei_local->txqueue++;
220
221 dev->tbusy = (ei_local->tx1 && ei_local->tx2);
222 } else {
223 ei_block_output(dev, length, skb->data, ei_local->tx_start_page);
224 NS8390_trigger_send(dev, send_length, ei_local->tx_start_page);
225 dev->trans_start = jiffies;
226 dev->tbusy = 1;
227 }
228
229
230 ei_local->irqlock = 0;
231 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
232
233 dev_kfree_skb (skb, FREE_WRITE);
234
235 return 0;
236 }
237
238
239
240 void ei_interrupt(int reg_ptr)
241 {
242 int irq = -(((struct pt_regs *)reg_ptr)->orig_eax+2);
243 struct device *dev = (struct device *)(irq2dev_map[irq]);
244 int e8390_base;
245 int interrupts, boguscount = 0;
246 struct ei_device *ei_local;
247
248 if (dev == NULL) {
249 printk ("net_interrupt(): irq %d for unknown device.\n", irq);
250 return;
251 }
252 e8390_base = dev->base_addr;
253 ei_local = (struct ei_device *) dev->priv;
254 if (dev->interrupt || ei_local->irqlock) {
255
256 sti();
257 printk(ei_local->irqlock
258 ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
259 : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
260 dev->name, inb_p(e8390_base + EN0_ISR),
261 inb_p(e8390_base + EN0_IMR));
262 return;
263 }
264
265 dev->interrupt = 1;
266 sti();
267
268
269 outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
270 if (ei_debug > 3)
271 printk("%s: interrupt(isr=%#2.2x).\n", dev->name,
272 inb_p(e8390_base + EN0_ISR));
273
274
275 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0
276 && ++boguscount < 9) {
277 if (interrupts & ENISR_RDC) {
278
279 outb_p(ENISR_RDC, e8390_base + EN0_ISR);
280 }
281 if (interrupts & ENISR_OVER) {
282 ei_rx_overrun(dev);
283 } else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) {
284
285 ei_receive(dev);
286 }
287
288 if (interrupts & ENISR_TX) {
289 ei_tx_intr(dev);
290 } else if (interrupts & ENISR_COUNTERS) {
291 struct ei_device *ei_local = (struct ei_device *) dev->priv;
292 ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
293 ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
294 ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
295 outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR);
296 }
297
298
299 if (interrupts & ENISR_TX_ERR) {
300 outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR);
301 }
302 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
303 }
304
305 if (interrupts && ei_debug) {
306 printk("%s: unknown interrupt %#2x\n", dev->name, interrupts);
307 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
308 outb_p(0xff, e8390_base + EN0_ISR);
309 }
310 dev->interrupt = 0;
311 return;
312 }
313
314
315
316 static void ei_tx_intr(struct device *dev)
317 {
318 int e8390_base = dev->base_addr;
319 int status = inb(e8390_base + EN0_TSR);
320 struct ei_device *ei_local = (struct ei_device *) dev->priv;
321
322 outb_p(ENISR_TX, e8390_base + EN0_ISR);
323
324 if (ei_local->pingpong) {
325 ei_local->txqueue--;
326 if (ei_local->tx1 < 0) {
327 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
328 printk("%s: bogus last_tx_buffer %d, tx1=%d.\n",
329 ei_local->name, ei_local->lasttx, ei_local->tx1);
330 ei_local->tx1 = 0;
331 dev->tbusy = 0;
332 if (ei_local->tx2 > 0) {
333 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
334 dev->trans_start = jiffies;
335 ei_local->txing = 1;
336 ei_local->tx2 = -1,
337 ei_local->lasttx = 2;
338 } else
339 ei_local->lasttx = 20, ei_local->txing = 0;
340 } else if (ei_local->tx2 < 0) {
341 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
342 printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
343 ei_local->name, ei_local->lasttx, ei_local->tx2);
344 ei_local->tx2 = 0;
345 dev->tbusy = 0;
346 if (ei_local->tx1 > 0) {
347 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
348 dev->trans_start = jiffies;
349 ei_local->txing = 1;
350 ei_local->tx1 = -1;
351 ei_local->lasttx = 1;
352 } else
353 ei_local->lasttx = 10, ei_local->txing = 0;
354 } else
355 printk("%s: unexpected TX-done interrupt, lasttx=%d.\n",
356 dev->name, ei_local->lasttx);
357 } else {
358 ei_local->txing = 0;
359 dev->tbusy = 0;
360 }
361
362
363 if (status & ENTSR_COL) ei_local->stat.collisions++;
364 if (status & ENTSR_PTX)
365 ei_local->stat.tx_packets++;
366 else {
367 ei_local->stat.tx_errors++;
368 if (status & ENTSR_ABT) ei_local->stat.tx_aborted_errors++;
369 if (status & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
370 if (status & ENTSR_FU) ei_local->stat.tx_fifo_errors++;
371 if (status & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
372 if (status & ENTSR_OWC) ei_local->stat.tx_window_errors++;
373 }
374
375 mark_bh (NET_BH);
376 }
377
378
379
380 static void ei_receive(struct device *dev)
381 {
382 int e8390_base = dev->base_addr;
383 struct ei_device *ei_local = (struct ei_device *) dev->priv;
384 int rxing_page, this_frame, next_frame, current_offset;
385 int rx_pkt_count = 0;
386 struct e8390_pkt_hdr rx_frame;
387 int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
388
389 while (++rx_pkt_count < 10) {
390 int pkt_len;
391
392
393 outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
394 rxing_page = inb_p(e8390_base + EN1_CURPAG);
395 outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
396
397
398 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
399 if (this_frame >= ei_local->stop_page)
400 this_frame = ei_local->rx_start_page;
401
402
403
404 if (ei_debug > 0 && this_frame != ei_local->current_page)
405 printk("%s: mismatched read page pointers %2x vs %2x.\n",
406 dev->name, this_frame, ei_local->current_page);
407
408 if (this_frame == rxing_page)
409 break;
410
411 current_offset = this_frame << 8;
412 ei_block_input(dev, sizeof(rx_frame), (char *)&rx_frame,
413 current_offset);
414
415 pkt_len = rx_frame.count - sizeof(rx_frame);
416
417 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
418
419
420
421
422 if (rx_frame.next != next_frame
423 && rx_frame.next != next_frame + 1
424 && rx_frame.next != next_frame - num_rx_pages
425 && rx_frame.next != next_frame + 1 - num_rx_pages) {
426 ei_local->current_page = rxing_page;
427 outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
428 ei_local->stat.rx_errors++;
429 continue;
430 }
431
432 if (pkt_len < 60 || pkt_len > 1518) {
433 if (ei_debug)
434 printk("%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
435 dev->name, rx_frame.count, rx_frame.status,
436 rx_frame.next);
437 ei_local->stat.rx_errors++;
438 } else if ((rx_frame.status & 0x0F) == ENRSR_RXOK) {
439 struct sk_buff *skb;
440
441 skb = alloc_skb(pkt_len, GFP_ATOMIC);
442 if (skb == NULL) {
443 if (ei_debug > 1)
444 printk("%s: Couldn't allocate a sk_buff of size %d.\n",
445 dev->name, pkt_len);
446 ei_local->stat.rx_dropped++;
447 break;
448 } else {
449 skb->len = pkt_len;
450 skb->dev = dev;
451
452 ei_block_input(dev, pkt_len, (char *) skb->data,
453 current_offset + sizeof(rx_frame));
454 netif_rx(skb);
455 ei_local->stat.rx_packets++;
456 }
457 } else {
458 int errs = rx_frame.status;
459 if (ei_debug)
460 printk("%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
461 dev->name, rx_frame.status, rx_frame.next,
462 rx_frame.count);
463 if (errs & ENRSR_FO)
464 ei_local->stat.rx_fifo_errors++;
465 }
466 next_frame = rx_frame.next;
467
468
469 if (next_frame >= ei_local->stop_page) {
470 printk("%s: next frame inconsistency, %#2x..", dev->name,
471 next_frame);
472 next_frame = ei_local->rx_start_page;
473 }
474 ei_local->current_page = next_frame;
475 outb(next_frame-1, e8390_base+EN0_BOUNDARY);
476 }
477
478
479
480
481
482 if (rx_pkt_count > high_water_mark)
483 high_water_mark = rx_pkt_count;
484
485
486 outb_p(ENISR_RX+ENISR_RX_ERR+ENISR_OVER, e8390_base+EN0_ISR);
487 return;
488 }
489
490
491
492 static void ei_rx_overrun(struct device *dev)
493 {
494 int e8390_base = dev->base_addr;
495 int reset_start_time = jiffies;
496 struct ei_device *ei_local = (struct ei_device *) dev->priv;
497
498
499 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
500
501 if (ei_debug > 1)
502 printk("%s: Receiver overrun.\n", dev->name);
503 ei_local->stat.rx_over_errors++;
504
505
506
507
508
509
510
511
512 while ((inb_p(e8390_base+EN0_ISR) & ENISR_RESET) == 0)
513 if (jiffies - reset_start_time > 1) {
514 printk("%s: reset did not complete at ei_rx_overrun.\n",
515 dev->name);
516 NS8390_init(dev, 1);
517 return;
518 }
519
520
521 ei_receive(dev);
522
523 outb_p(0xff, e8390_base+EN0_ISR);
524
525 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
526 outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
527 }
528
529 static struct enet_statistics *get_stats(struct device *dev)
530 {
531 short ioaddr = dev->base_addr;
532 struct ei_device *ei_local = (struct ei_device *) dev->priv;
533
534
535 ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
536 ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
537 ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
538
539 return &ei_local->stat;
540 }
541
542 #ifdef HAVE_MULTICAST
543
544
545
546
547
548
549 static void set_multicast_list(struct device *dev, int num_addrs, void *addrs)
550 {
551 short ioaddr = dev->base_addr;
552
553 if (num_addrs > 0) {
554
555
556 outb_p(E8390_RXCONFIG | 0x08, ioaddr + EN0_RXCR);
557 } else if (num_addrs < 0)
558 outb_p(E8390_RXCONFIG | 0x18, ioaddr + EN0_RXCR);
559 else
560 outb_p(E8390_RXCONFIG, ioaddr + EN0_RXCR);
561 }
562 #endif
563
564
565 int ethdev_init(struct device *dev)
566 {
567 if (ei_debug > 1)
568 printk(version);
569
570 if (dev->priv == NULL) {
571 struct ei_device *ei_local;
572
573 dev->priv = kmalloc(sizeof(struct ei_device), GFP_KERNEL);
574 memset(dev->priv, 0, sizeof(struct ei_device));
575 ei_local = (struct ei_device *)dev->priv;
576 #ifndef NO_PINGPONG
577 ei_local->pingpong = 1;
578 #endif
579 }
580
581
582 if (dev->open == NULL)
583 dev->open = &ei_open;
584
585 dev->hard_start_xmit = &ei_start_xmit;
586 dev->get_stats = get_stats;
587 #ifdef HAVE_MULTICAST
588 dev->set_multicast_list = &set_multicast_list;
589 #endif
590
591 ether_setup(dev);
592
593 return 0;
594 }
595
596
597
598
599 void NS8390_init(struct device *dev, int startp)
600 {
601 int e8390_base = dev->base_addr;
602 struct ei_device *ei_local = (struct ei_device *) dev->priv;
603 int i;
604 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
605
606
607 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base);
608 outb_p(endcfg, e8390_base + EN0_DCFG);
609
610 outb_p(0x00, e8390_base + EN0_RCNTLO);
611 outb_p(0x00, e8390_base + EN0_RCNTHI);
612
613 outb_p(E8390_RXOFF, e8390_base + EN0_RXCR);
614 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
615
616 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
617 ei_local->tx1 = ei_local->tx2 = 0;
618 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
619 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY);
620 ei_local->current_page = ei_local->rx_start_page;
621 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
622
623 outb_p(0xFF, e8390_base + EN0_ISR);
624 outb_p(0x00, e8390_base + EN0_IMR);
625
626
627
628 cli();
629 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base);
630 for(i = 0; i < 6; i++) {
631 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS + i);
632 }
633
634
635 for(i = 0; i < 8; i++)
636 outb_p(0xff, e8390_base + EN1_MULT + i);
637
638 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
639 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base);
640 sti();
641 dev->tbusy = 0;
642 dev->interrupt = 0;
643 ei_local->tx1 = ei_local->tx2 = 0;
644 ei_local->txing = 0;
645 if (startp) {
646 outb_p(0xff, e8390_base + EN0_ISR);
647 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
648 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base);
649 outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
650
651 outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
652 }
653 return;
654 }
655
656
657 static void NS8390_trigger_send(struct device *dev, unsigned int length,
658 int start_page)
659 {
660 int e8390_base = dev->base_addr;
661
662 ei_status.txing = 1;
663 outb_p(E8390_NODMA+E8390_PAGE0, e8390_base);
664
665 if (inb_p(e8390_base) & E8390_TRANS) {
666 printk("%s: trigger_send() called with the transmitter busy.\n",
667 dev->name);
668 return;
669 }
670 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
671 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
672 outb_p(start_page, e8390_base + EN0_TPSR);
673 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base);
674 return;
675 }
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