FreeBSD/Linux Kernel Cross Reference
sys/dev/ex/if_ex.c
1 /*
2 * Copyright (c) 1996, Javier Martín Rueda (jmrueda@diatel.upm.es)
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: releng/5.0/sys/dev/ex/if_ex.c 106937 2002-11-14 23:54:55Z sam $
28 *
29 * MAINTAINER: Matthew N. Dodd <winter@jurai.net>
30 * <mdodd@FreeBSD.org>
31 */
32
33 /*
34 * Intel EtherExpress Pro/10, Pro/10+ Ethernet driver
35 *
36 * Revision history:
37 *
38 * 30-Oct-1996: first beta version. Inet and BPF supported, but no multicast.
39 */
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/sockio.h>
45 #include <sys/mbuf.h>
46 #include <sys/socket.h>
47
48 #include <sys/module.h>
49 #include <sys/bus.h>
50
51 #include <machine/bus.h>
52 #include <machine/resource.h>
53 #include <sys/rman.h>
54
55 #include <net/if.h>
56 #include <net/if_arp.h>
57 #include <net/if_media.h>
58 #include <net/ethernet.h>
59 #include <net/bpf.h>
60
61 #include <netinet/in.h>
62 #include <netinet/if_ether.h>
63
64
65 #include <isa/isavar.h>
66 #include <isa/pnpvar.h>
67
68 #include <dev/ex/if_exreg.h>
69 #include <dev/ex/if_exvar.h>
70
71 #ifdef EXDEBUG
72 # define Start_End 1
73 # define Rcvd_Pkts 2
74 # define Sent_Pkts 4
75 # define Status 8
76 static int debug_mask = 0;
77 static int exintr_count = 0;
78 # define DODEBUG(level, action) if (level & debug_mask) action
79 #else
80 # define DODEBUG(level, action)
81 #endif
82
83 char irq2eemap[] =
84 { -1, -1, 0, 1, -1, 2, -1, -1, -1, 0, 3, 4, -1, -1, -1, -1 };
85 u_char ee2irqmap[] =
86 { 9, 3, 5, 10, 11, 0, 0, 0 };
87
88 char plus_irq2eemap[] =
89 { -1, -1, -1, 0, 1, 2, -1, 3, -1, 4, 5, 6, 7, -1, -1, -1 };
90 u_char plus_ee2irqmap[] =
91 { 3, 4, 5, 7, 9, 10, 11, 12 };
92
93 /* Network Interface Functions */
94 static void ex_init (void *);
95 static void ex_start (struct ifnet *);
96 static int ex_ioctl (struct ifnet *, u_long, caddr_t);
97 static void ex_watchdog (struct ifnet *);
98
99 /* ifmedia Functions */
100 static int ex_ifmedia_upd (struct ifnet *);
101 static void ex_ifmedia_sts (struct ifnet *, struct ifmediareq *);
102
103 static int ex_get_media (u_int32_t iobase);
104
105 static void ex_reset (struct ex_softc *);
106
107 static void ex_tx_intr (struct ex_softc *);
108 static void ex_rx_intr (struct ex_softc *);
109
110 int
111 look_for_card (u_int32_t iobase)
112 {
113 int count1, count2;
114
115 /*
116 * Check for the i82595 signature, and check that the round robin
117 * counter actually advances.
118 */
119 if (((count1 = inb(iobase + ID_REG)) & Id_Mask) != Id_Sig)
120 return(0);
121 count2 = inb(iobase + ID_REG);
122 count2 = inb(iobase + ID_REG);
123 count2 = inb(iobase + ID_REG);
124
125 return((count2 & Counter_bits) == ((count1 + 0xc0) & Counter_bits));
126 }
127
128 void
129 ex_get_address (u_int32_t iobase, u_char *enaddr)
130 {
131 u_int16_t eaddr_tmp;
132
133 eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Lo);
134 enaddr[5] = eaddr_tmp & 0xff;
135 enaddr[4] = eaddr_tmp >> 8;
136 eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Mid);
137 enaddr[3] = eaddr_tmp & 0xff;
138 enaddr[2] = eaddr_tmp >> 8;
139 eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Hi);
140 enaddr[1] = eaddr_tmp & 0xff;
141 enaddr[0] = eaddr_tmp >> 8;
142
143 return;
144 }
145
146 int
147 ex_card_type (u_char *enaddr)
148 {
149 if ((enaddr[0] == 0x00) && (enaddr[1] == 0xA0) && (enaddr[2] == 0xC9))
150 return (CARD_TYPE_EX_10_PLUS);
151
152 return (CARD_TYPE_EX_10);
153 }
154
155 /*
156 * Caller is responsible for eventually calling
157 * ex_release_resources() on failure.
158 */
159 int
160 ex_alloc_resources (device_t dev)
161 {
162 struct ex_softc * sc = device_get_softc(dev);
163 int error = 0;
164
165 sc->ioport = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->ioport_rid,
166 0, ~0, 1, RF_ACTIVE);
167 if (!sc->ioport) {
168 device_printf(dev, "No I/O space?!\n");
169 error = ENOMEM;
170 goto bad;
171 }
172
173 sc->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->irq_rid,
174 0, ~0, 1, RF_ACTIVE);
175
176 if (!sc->irq) {
177 device_printf(dev, "No IRQ?!\n");
178 error = ENOMEM;
179 goto bad;
180 }
181
182 bad:
183 return (error);
184 }
185
186 void
187 ex_release_resources (device_t dev)
188 {
189 struct ex_softc * sc = device_get_softc(dev);
190
191 if (sc->ih) {
192 bus_teardown_intr(dev, sc->irq, sc->ih);
193 sc->ih = NULL;
194 }
195
196 if (sc->ioport) {
197 bus_release_resource(dev, SYS_RES_IOPORT,
198 sc->ioport_rid, sc->ioport);
199 sc->ioport = NULL;
200 }
201
202 if (sc->irq) {
203 bus_release_resource(dev, SYS_RES_IRQ,
204 sc->irq_rid, sc->irq);
205 sc->irq = NULL;
206 }
207
208 return;
209 }
210
211 int
212 ex_attach(device_t dev)
213 {
214 struct ex_softc * sc = device_get_softc(dev);
215 struct ifnet * ifp = &sc->arpcom.ac_if;
216 struct ifmedia * ifm;
217 int unit = device_get_unit(dev);
218 u_int16_t temp;
219
220 /* work out which set of irq <-> internal tables to use */
221 if (ex_card_type(sc->arpcom.ac_enaddr) == CARD_TYPE_EX_10_PLUS) {
222 sc->irq2ee = plus_irq2eemap;
223 sc->ee2irq = plus_ee2irqmap;
224 } else {
225 sc->irq2ee = irq2eemap;
226 sc->ee2irq = ee2irqmap;
227 }
228
229 sc->mem_size = CARD_RAM_SIZE; /* XXX This should be read from the card itself. */
230
231 /*
232 * Initialize the ifnet structure.
233 */
234 ifp->if_softc = sc;
235 ifp->if_unit = unit;
236 ifp->if_name = "ex";
237 ifp->if_mtu = ETHERMTU;
238 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST /* XXX not done yet. | IFF_MULTICAST */;
239 ifp->if_output = ether_output;
240 ifp->if_start = ex_start;
241 ifp->if_ioctl = ex_ioctl;
242 ifp->if_watchdog = ex_watchdog;
243 ifp->if_init = ex_init;
244 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
245
246 ifmedia_init(&sc->ifmedia, 0, ex_ifmedia_upd, ex_ifmedia_sts);
247
248 temp = eeprom_read(sc->iobase, EE_W5);
249 if (temp & EE_W5_PORT_TPE)
250 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL);
251 if (temp & EE_W5_PORT_BNC)
252 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_2, 0, NULL);
253 if (temp & EE_W5_PORT_AUI)
254 ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_5, 0, NULL);
255
256 ifmedia_set(&sc->ifmedia, ex_get_media(sc->iobase));
257
258 ifm = &sc->ifmedia;
259 ifm->ifm_media = ifm->ifm_cur->ifm_media;
260 ex_ifmedia_upd(ifp);
261
262 /*
263 * Attach the interface.
264 */
265 ether_ifattach(ifp, sc->arpcom.ac_enaddr);
266
267 device_printf(sc->dev, "Ethernet address %6D\n",
268 sc->arpcom.ac_enaddr, ":");
269
270 return(0);
271 }
272
273 static void
274 ex_init(void *xsc)
275 {
276 struct ex_softc * sc = (struct ex_softc *) xsc;
277 struct ifnet * ifp = &sc->arpcom.ac_if;
278 int s;
279 int i;
280 register int iobase = sc->iobase;
281 unsigned short temp_reg;
282
283 DODEBUG(Start_End, printf("ex_init%d: start\n", ifp->if_unit););
284
285 if (TAILQ_FIRST(&ifp->if_addrhead) == NULL) {
286 return;
287 }
288 s = splimp();
289 ifp->if_timer = 0;
290
291 /*
292 * Load the ethernet address into the card.
293 */
294 outb(iobase + CMD_REG, Bank2_Sel);
295 temp_reg = inb(iobase + EEPROM_REG);
296 if (temp_reg & Trnoff_Enable) {
297 outb(iobase + EEPROM_REG, temp_reg & ~Trnoff_Enable);
298 }
299 for (i = 0; i < ETHER_ADDR_LEN; i++) {
300 outb(iobase + I_ADDR_REG0 + i, sc->arpcom.ac_enaddr[i]);
301 }
302 /*
303 * - Setup transmit chaining and discard bad received frames.
304 * - Match broadcast.
305 * - Clear test mode.
306 * - Set receiving mode.
307 * - Set IRQ number.
308 */
309 outb(iobase + REG1, inb(iobase + REG1) | Tx_Chn_Int_Md | Tx_Chn_ErStp | Disc_Bad_Fr);
310 outb(iobase + REG2, inb(iobase + REG2) | No_SA_Ins | RX_CRC_InMem);
311 outb(iobase + REG3, inb(iobase + REG3) & 0x3f /* XXX constants. */ );
312 outb(iobase + CMD_REG, Bank1_Sel);
313 outb(iobase + INT_NO_REG, (inb(iobase + INT_NO_REG) & 0xf8) | sc->irq2ee[sc->irq_no]);
314
315 /*
316 * Divide the available memory in the card into rcv and xmt buffers.
317 * By default, I use the first 3/4 of the memory for the rcv buffer,
318 * and the remaining 1/4 of the memory for the xmt buffer.
319 */
320 sc->rx_mem_size = sc->mem_size * 3 / 4;
321 sc->tx_mem_size = sc->mem_size - sc->rx_mem_size;
322 sc->rx_lower_limit = 0x0000;
323 sc->rx_upper_limit = sc->rx_mem_size - 2;
324 sc->tx_lower_limit = sc->rx_mem_size;
325 sc->tx_upper_limit = sc->mem_size - 2;
326 outb(iobase + RCV_LOWER_LIMIT_REG, sc->rx_lower_limit >> 8);
327 outb(iobase + RCV_UPPER_LIMIT_REG, sc->rx_upper_limit >> 8);
328 outb(iobase + XMT_LOWER_LIMIT_REG, sc->tx_lower_limit >> 8);
329 outb(iobase + XMT_UPPER_LIMIT_REG, sc->tx_upper_limit >> 8);
330
331 /*
332 * Enable receive and transmit interrupts, and clear any pending int.
333 */
334 outb(iobase + REG1, inb(iobase + REG1) | TriST_INT);
335 outb(iobase + CMD_REG, Bank0_Sel);
336 outb(iobase + MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
337 outb(iobase + STATUS_REG, All_Int);
338
339 /*
340 * Initialize receive and transmit ring buffers.
341 */
342 outw(iobase + RCV_BAR, sc->rx_lower_limit);
343 sc->rx_head = sc->rx_lower_limit;
344 outw(iobase + RCV_STOP_REG, sc->rx_upper_limit | 0xfe);
345 outw(iobase + XMT_BAR, sc->tx_lower_limit);
346 sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
347
348 ifp->if_flags |= IFF_RUNNING;
349 ifp->if_flags &= ~IFF_OACTIVE;
350 DODEBUG(Status, printf("OIDLE init\n"););
351
352 /*
353 * Final reset of the board, and enable operation.
354 */
355 outb(iobase + CMD_REG, Sel_Reset_CMD);
356 DELAY(2);
357 outb(iobase + CMD_REG, Rcv_Enable_CMD);
358
359 ex_start(ifp);
360 splx(s);
361
362 DODEBUG(Start_End, printf("ex_init%d: finish\n", ifp->if_unit););
363 }
364
365
366 static void
367 ex_start(struct ifnet *ifp)
368 {
369 struct ex_softc * sc = ifp->if_softc;
370 int iobase = sc->iobase;
371 int i, s, len, data_len, avail, dest, next;
372 unsigned char tmp16[2];
373 struct mbuf * opkt;
374 struct mbuf * m;
375
376 DODEBUG(Start_End, printf("ex_start%d: start\n", unit););
377
378 s = splimp();
379
380 /*
381 * Main loop: send outgoing packets to network card until there are no
382 * more packets left, or the card cannot accept any more yet.
383 */
384 while (((opkt = ifp->if_snd.ifq_head) != NULL) &&
385 !(ifp->if_flags & IFF_OACTIVE)) {
386
387 /*
388 * Ensure there is enough free transmit buffer space for
389 * this packet, including its header. Note: the header
390 * cannot wrap around the end of the transmit buffer and
391 * must be kept together, so we allow space for twice the
392 * length of the header, just in case.
393 */
394
395 for (len = 0, m = opkt; m != NULL; m = m->m_next) {
396 len += m->m_len;
397 }
398
399 data_len = len;
400
401 DODEBUG(Sent_Pkts, printf("1. Sending packet with %d data bytes. ", data_len););
402
403 if (len & 1) {
404 len += XMT_HEADER_LEN + 1;
405 } else {
406 len += XMT_HEADER_LEN;
407 }
408
409 if ((i = sc->tx_tail - sc->tx_head) >= 0) {
410 avail = sc->tx_mem_size - i;
411 } else {
412 avail = -i;
413 }
414
415 DODEBUG(Sent_Pkts, printf("i=%d, avail=%d\n", i, avail););
416
417 if (avail >= len + XMT_HEADER_LEN) {
418 IF_DEQUEUE(&ifp->if_snd, opkt);
419
420 #ifdef EX_PSA_INTR
421 /*
422 * Disable rx and tx interrupts, to avoid corruption
423 * of the host address register by interrupt service
424 * routines.
425 * XXX Is this necessary with splimp() enabled?
426 */
427 outb(iobase + MASK_REG, All_Int);
428 #endif
429
430 /*
431 * Compute the start and end addresses of this
432 * frame in the tx buffer.
433 */
434 dest = sc->tx_tail;
435 next = dest + len;
436
437 if (next > sc->tx_upper_limit) {
438 if ((sc->tx_upper_limit + 2 - sc->tx_tail) <=
439 XMT_HEADER_LEN) {
440 dest = sc->tx_lower_limit;
441 next = dest + len;
442 } else {
443 next = sc->tx_lower_limit +
444 next - sc->tx_upper_limit - 2;
445 }
446 }
447
448 /*
449 * Build the packet frame in the card's ring buffer.
450 */
451 DODEBUG(Sent_Pkts, printf("2. dest=%d, next=%d. ", dest, next););
452
453 outw(iobase + HOST_ADDR_REG, dest);
454 outw(iobase + IO_PORT_REG, Transmit_CMD);
455 outw(iobase + IO_PORT_REG, 0);
456 outw(iobase + IO_PORT_REG, next);
457 outw(iobase + IO_PORT_REG, data_len);
458
459 /*
460 * Output the packet data to the card. Ensure all
461 * transfers are 16-bit wide, even if individual
462 * mbufs have odd length.
463 */
464
465 for (m = opkt, i = 0; m != NULL; m = m->m_next) {
466 DODEBUG(Sent_Pkts, printf("[%d]", m->m_len););
467 if (i) {
468 tmp16[1] = *(mtod(m, caddr_t));
469 outsw(iobase + IO_PORT_REG, tmp16, 1);
470 }
471 outsw(iobase + IO_PORT_REG,
472 mtod(m, caddr_t) + i, (m->m_len - i) / 2);
473
474 if ((i = (m->m_len - i) & 1) != 0) {
475 tmp16[0] = *(mtod(m, caddr_t) +
476 m->m_len - 1);
477 }
478 }
479 if (i) {
480 outsw(iobase + IO_PORT_REG, tmp16, 1);
481 }
482
483 /*
484 * If there were other frames chained, update the
485 * chain in the last one.
486 */
487 if (sc->tx_head != sc->tx_tail) {
488 if (sc->tx_tail != dest) {
489 outw(iobase + HOST_ADDR_REG,
490 sc->tx_last + XMT_Chain_Point);
491 outw(iobase + IO_PORT_REG, dest);
492 }
493 outw(iobase + HOST_ADDR_REG,
494 sc->tx_last + XMT_Byte_Count);
495 i = inw(iobase + IO_PORT_REG);
496 outw(iobase + HOST_ADDR_REG,
497 sc->tx_last + XMT_Byte_Count);
498 outw(iobase + IO_PORT_REG, i | Ch_bit);
499 }
500
501 /*
502 * Resume normal operation of the card:
503 * - Make a dummy read to flush the DRAM write
504 * pipeline.
505 * - Enable receive and transmit interrupts.
506 * - Send Transmit or Resume_XMT command, as
507 * appropriate.
508 */
509 inw(iobase + IO_PORT_REG);
510 #ifdef EX_PSA_INTR
511 outb(iobase + MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
512 #endif
513 if (sc->tx_head == sc->tx_tail) {
514 outw(iobase + XMT_BAR, dest);
515 outb(iobase + CMD_REG, Transmit_CMD);
516 sc->tx_head = dest;
517 DODEBUG(Sent_Pkts, printf("Transmit\n"););
518 } else {
519 outb(iobase + CMD_REG, Resume_XMT_List_CMD);
520 DODEBUG(Sent_Pkts, printf("Resume\n"););
521 }
522
523 sc->tx_last = dest;
524 sc->tx_tail = next;
525
526 BPF_MTAP(ifp, opkt);
527
528 ifp->if_timer = 2;
529 ifp->if_opackets++;
530 m_freem(opkt);
531 } else {
532 ifp->if_flags |= IFF_OACTIVE;
533 DODEBUG(Status, printf("OACTIVE start\n"););
534 }
535 }
536
537 splx(s);
538
539 DODEBUG(Start_End, printf("ex_start%d: finish\n", unit););
540 }
541
542 void
543 ex_stop(struct ex_softc *sc)
544 {
545 int iobase = sc->iobase;
546
547 DODEBUG(Start_End, printf("ex_stop%d: start\n", unit););
548
549 /*
550 * Disable card operation:
551 * - Disable the interrupt line.
552 * - Flush transmission and disable reception.
553 * - Mask and clear all interrupts.
554 * - Reset the 82595.
555 */
556 outb(iobase + CMD_REG, Bank1_Sel);
557 outb(iobase + REG1, inb(iobase + REG1) & ~TriST_INT);
558 outb(iobase + CMD_REG, Bank0_Sel);
559 outb(iobase + CMD_REG, Rcv_Stop);
560 sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
561 sc->tx_last = 0; /* XXX I think these two lines are not necessary, because ex_init will always be called again to reinit the interface. */
562 outb(iobase + MASK_REG, All_Int);
563 outb(iobase + STATUS_REG, All_Int);
564 outb(iobase + CMD_REG, Reset_CMD);
565 DELAY(200);
566
567 DODEBUG(Start_End, printf("ex_stop%d: finish\n", unit););
568
569 return;
570 }
571
572 void
573 ex_intr(void *arg)
574 {
575 struct ex_softc * sc = (struct ex_softc *)arg;
576 struct ifnet * ifp = &sc->arpcom.ac_if;
577 int iobase = sc->iobase;
578 int int_status, send_pkts;
579
580 DODEBUG(Start_End, printf("ex_intr%d: start\n", unit););
581
582 #ifdef EXDEBUG
583 if (++exintr_count != 1)
584 printf("WARNING: nested interrupt (%d). Mail the author.\n", exintr_count);
585 #endif
586
587 send_pkts = 0;
588 while ((int_status = inb(iobase + STATUS_REG)) & (Tx_Int | Rx_Int)) {
589 if (int_status & Rx_Int) {
590 outb(iobase + STATUS_REG, Rx_Int);
591
592 ex_rx_intr(sc);
593 } else if (int_status & Tx_Int) {
594 outb(iobase + STATUS_REG, Tx_Int);
595
596 ex_tx_intr(sc);
597 send_pkts = 1;
598 }
599 }
600
601 /*
602 * If any packet has been transmitted, and there are queued packets to
603 * be sent, attempt to send more packets to the network card.
604 */
605
606 if (send_pkts && (ifp->if_snd.ifq_head != NULL)) {
607 ex_start(ifp);
608 }
609
610 #ifdef EXDEBUG
611 exintr_count--;
612 #endif
613
614 DODEBUG(Start_End, printf("ex_intr%d: finish\n", unit););
615
616 return;
617 }
618
619 static void
620 ex_tx_intr(struct ex_softc *sc)
621 {
622 struct ifnet * ifp = &sc->arpcom.ac_if;
623 int iobase = sc->iobase;
624 int tx_status;
625
626 DODEBUG(Start_End, printf("ex_tx_intr%d: start\n", unit););
627
628 /*
629 * - Cancel the watchdog.
630 * For all packets transmitted since last transmit interrupt:
631 * - Advance chain pointer to next queued packet.
632 * - Update statistics.
633 */
634
635 ifp->if_timer = 0;
636
637 while (sc->tx_head != sc->tx_tail) {
638 outw(iobase + HOST_ADDR_REG, sc->tx_head);
639
640 if (! inw(iobase + IO_PORT_REG) & Done_bit)
641 break;
642
643 tx_status = inw(iobase + IO_PORT_REG);
644 sc->tx_head = inw(iobase + IO_PORT_REG);
645
646 if (tx_status & TX_OK_bit) {
647 ifp->if_opackets++;
648 } else {
649 ifp->if_oerrors++;
650 }
651
652 ifp->if_collisions += tx_status & No_Collisions_bits;
653 }
654
655 /*
656 * The card should be ready to accept more packets now.
657 */
658
659 ifp->if_flags &= ~IFF_OACTIVE;
660
661 DODEBUG(Status, printf("OIDLE tx_intr\n"););
662 DODEBUG(Start_End, printf("ex_tx_intr%d: finish\n", unit););
663
664 return;
665 }
666
667 static void
668 ex_rx_intr(struct ex_softc *sc)
669 {
670 struct ifnet * ifp = &sc->arpcom.ac_if;
671 int iobase = sc->iobase;
672 int rx_status;
673 int pkt_len;
674 int QQQ;
675 struct mbuf * m;
676 struct mbuf * ipkt;
677 struct ether_header * eh;
678
679 DODEBUG(Start_End, printf("ex_rx_intr%d: start\n", unit););
680
681 /*
682 * For all packets received since last receive interrupt:
683 * - If packet ok, read it into a new mbuf and queue it to interface,
684 * updating statistics.
685 * - If packet bad, just discard it, and update statistics.
686 * Finally, advance receive stop limit in card's memory to new location.
687 */
688
689 outw(iobase + HOST_ADDR_REG, sc->rx_head);
690
691 while (inw(iobase + IO_PORT_REG) == RCV_Done) {
692
693 rx_status = inw(iobase + IO_PORT_REG);
694 sc->rx_head = inw(iobase + IO_PORT_REG);
695 QQQ = pkt_len = inw(iobase + IO_PORT_REG);
696
697 if (rx_status & RCV_OK_bit) {
698 MGETHDR(m, M_DONTWAIT, MT_DATA);
699 ipkt = m;
700 if (ipkt == NULL) {
701 ifp->if_iqdrops++;
702 } else {
703 ipkt->m_pkthdr.rcvif = ifp;
704 ipkt->m_pkthdr.len = pkt_len;
705 ipkt->m_len = MHLEN;
706
707 while (pkt_len > 0) {
708 if (pkt_len > MINCLSIZE) {
709 MCLGET(m, M_DONTWAIT);
710 if (m->m_flags & M_EXT) {
711 m->m_len = MCLBYTES;
712 } else {
713 m_freem(ipkt);
714 ifp->if_iqdrops++;
715 goto rx_another;
716 }
717 }
718 m->m_len = min(m->m_len, pkt_len);
719
720 /*
721 * NOTE: I'm assuming that all mbufs allocated are of even length,
722 * except for the last one in an odd-length packet.
723 */
724
725 insw(iobase + IO_PORT_REG,
726 mtod(m, caddr_t), m->m_len / 2);
727
728 if (m->m_len & 1) {
729 *(mtod(m, caddr_t) + m->m_len - 1) = inb(iobase + IO_PORT_REG);
730 }
731 pkt_len -= m->m_len;
732
733 if (pkt_len > 0) {
734 MGET(m->m_next, M_DONTWAIT, MT_DATA);
735 if (m->m_next == NULL) {
736 m_freem(ipkt);
737 ifp->if_iqdrops++;
738 goto rx_another;
739 }
740 m = m->m_next;
741 m->m_len = MLEN;
742 }
743 }
744 eh = mtod(ipkt, struct ether_header *);
745 #ifdef EXDEBUG
746 if (debug_mask & Rcvd_Pkts) {
747 if ((eh->ether_dhost[5] != 0xff) || (eh->ether_dhost[0] != 0xff)) {
748 printf("Receive packet with %d data bytes: %6D -> ", QQQ, eh->ether_shost, ":");
749 printf("%6D\n", eh->ether_dhost, ":");
750 } /* QQQ */
751 }
752 #endif
753 (*ifp->if_input)(ifp, ipkt);
754 ifp->if_ipackets++;
755 }
756 } else {
757 ifp->if_ierrors++;
758 }
759 outw(iobase + HOST_ADDR_REG, sc->rx_head);
760 rx_another: ;
761 }
762
763 if (sc->rx_head < sc->rx_lower_limit + 2)
764 outw(iobase + RCV_STOP_REG, sc->rx_upper_limit);
765 else
766 outw(iobase + RCV_STOP_REG, sc->rx_head - 2);
767
768 DODEBUG(Start_End, printf("ex_rx_intr%d: finish\n", unit););
769
770 return;
771 }
772
773
774 static int
775 ex_ioctl(register struct ifnet *ifp, u_long cmd, caddr_t data)
776 {
777 struct ex_softc * sc = ifp->if_softc;
778 struct ifreq * ifr = (struct ifreq *)data;
779 int s;
780 int error = 0;
781
782 DODEBUG(Start_End, printf("ex_ioctl%d: start ", ifp->if_unit););
783
784 s = splimp();
785
786 switch(cmd) {
787 case SIOCSIFADDR:
788 case SIOCGIFADDR:
789 case SIOCSIFMTU:
790 error = ether_ioctl(ifp, cmd, data);
791 break;
792
793 case SIOCSIFFLAGS:
794 DODEBUG(Start_End, printf("SIOCSIFFLAGS"););
795 if ((ifp->if_flags & IFF_UP) == 0 &&
796 (ifp->if_flags & IFF_RUNNING)) {
797
798 ifp->if_flags &= ~IFF_RUNNING;
799 ex_stop(sc);
800 } else {
801 ex_init(sc);
802 }
803 break;
804 #ifdef NODEF
805 case SIOCGHWADDR:
806 DODEBUG(Start_End, printf("SIOCGHWADDR"););
807 bcopy((caddr_t)sc->sc_addr, (caddr_t)&ifr->ifr_data,
808 sizeof(sc->sc_addr));
809 break;
810 #endif
811 case SIOCADDMULTI:
812 DODEBUG(Start_End, printf("SIOCADDMULTI"););
813 case SIOCDELMULTI:
814 DODEBUG(Start_End, printf("SIOCDELMULTI"););
815 /* XXX Support not done yet. */
816 error = EINVAL;
817 break;
818 case SIOCSIFMEDIA:
819 case SIOCGIFMEDIA:
820 error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, cmd);
821 break;
822 default:
823 DODEBUG(Start_End, printf("unknown"););
824 error = EINVAL;
825 }
826
827 splx(s);
828
829 DODEBUG(Start_End, printf("\nex_ioctl%d: finish\n", ifp->if_unit););
830
831 return(error);
832 }
833
834
835 static void
836 ex_reset(struct ex_softc *sc)
837 {
838 int s;
839
840 DODEBUG(Start_End, printf("ex_reset%d: start\n", unit););
841
842 s = splimp();
843
844 ex_stop(sc);
845 ex_init(sc);
846
847 splx(s);
848
849 DODEBUG(Start_End, printf("ex_reset%d: finish\n", unit););
850
851 return;
852 }
853
854 static void
855 ex_watchdog(struct ifnet *ifp)
856 {
857 struct ex_softc * sc = ifp->if_softc;
858
859 DODEBUG(Start_End, printf("ex_watchdog%d: start\n", ifp->if_unit););
860
861 ifp->if_flags &= ~IFF_OACTIVE;
862
863 DODEBUG(Status, printf("OIDLE watchdog\n"););
864
865 ifp->if_oerrors++;
866 ex_reset(sc);
867 ex_start(ifp);
868
869 DODEBUG(Start_End, printf("ex_watchdog%d: finish\n", ifp->if_unit););
870
871 return;
872 }
873
874 static int
875 ex_get_media (u_int32_t iobase)
876 {
877 int tmp;
878
879 outb(iobase + CMD_REG, Bank2_Sel);
880 tmp = inb(iobase + REG3);
881 outb(iobase + CMD_REG, Bank0_Sel);
882
883 if (tmp & TPE_bit)
884 return(IFM_ETHER|IFM_10_T);
885 if (tmp & BNC_bit)
886 return(IFM_ETHER|IFM_10_2);
887
888 return (IFM_ETHER|IFM_10_5);
889 }
890
891 static int
892 ex_ifmedia_upd (ifp)
893 struct ifnet * ifp;
894 {
895
896 return (0);
897 }
898
899 static void
900 ex_ifmedia_sts(ifp, ifmr)
901 struct ifnet * ifp;
902 struct ifmediareq * ifmr;
903 {
904 struct ex_softc * sc = ifp->if_softc;
905
906 ifmr->ifm_active = ex_get_media(sc->iobase);
907
908 return;
909 }
910
911 u_short
912 eeprom_read(u_int32_t iobase, int location)
913 {
914 int i;
915 u_short data = 0;
916 int ee_addr;
917 int read_cmd = location | EE_READ_CMD;
918 short ctrl_val = EECS;
919
920 ee_addr = iobase + EEPROM_REG;
921 outb(iobase + CMD_REG, Bank2_Sel);
922 outb(ee_addr, EECS);
923 for (i = 8; i >= 0; i--) {
924 short outval = (read_cmd & (1 << i)) ? ctrl_val | EEDI : ctrl_val;
925 outb(ee_addr, outval);
926 outb(ee_addr, outval | EESK);
927 DELAY(3);
928 outb(ee_addr, outval);
929 DELAY(2);
930 }
931 outb(ee_addr, ctrl_val);
932
933 for (i = 16; i > 0; i--) {
934 outb(ee_addr, ctrl_val | EESK);
935 DELAY(3);
936 data = (data << 1) | ((inb(ee_addr) & EEDO) ? 1 : 0);
937 outb(ee_addr, ctrl_val);
938 DELAY(2);
939 }
940
941 ctrl_val &= ~EECS;
942 outb(ee_addr, ctrl_val | EESK);
943 DELAY(3);
944 outb(ee_addr, ctrl_val);
945 DELAY(2);
946 outb(iobase + CMD_REG, Bank0_Sel);
947 return(data);
948 }
Cache object: 3abda0010947dd452a05a40458d8a6b7
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