FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/if_le.c
1 /*-
2 * Copyright (c) 1994 Matt Thomas (thomas@lkg.dec.com)
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, this list of conditions and the following disclaimer.
10 * 2. The name of the author may not be used to endorse or promote products
11 * derived from this software without specific prior written permission
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 *
24 * $FreeBSD: releng/5.0/sys/i386/isa/if_le.c 106939 2002-11-15 00:00:15Z sam $
25 */
26
27 /*
28 * DEC EtherWORKS 2 Ethernet Controllers
29 * DEC EtherWORKS 3 Ethernet Controllers
30 *
31 * Written by Matt Thomas
32 * BPF support code stolen directly from if_ec.c
33 *
34 * This driver supports the DEPCA, DE100, DE101, DE200, DE201,
35 * DE2002, DE203, DE204, DE205, and DE422 cards.
36 */
37
38 #include "le.h"
39 #include "opt_inet.h"
40 #include "opt_ipx.h"
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/mbuf.h>
46 #include <sys/socket.h>
47 #include <sys/sockio.h>
48 #include <sys/malloc.h>
49 #include <sys/bus.h>
50
51 #include <net/ethernet.h>
52 #include <net/if.h>
53 #include <net/if_types.h>
54 #include <net/if_dl.h>
55
56 #include <netinet/in.h>
57 #include <netinet/if_ether.h>
58
59
60
61 #include <i386/isa/isa_device.h>
62 #include <i386/isa/icu.h>
63
64 #include <vm/vm.h>
65 #include <vm/pmap.h>
66
67 #include <net/bpf.h>
68
69 #ifndef COMPAT_OLDISA
70 #error "The le device requires the old isa compatibility shims"
71 #endif
72
73 /* Forward declarations */
74 typedef struct le_softc le_softc_t;
75 typedef struct le_board le_board_t;
76
77 typedef u_short le_mcbits_t;
78 #define LE_MC_NBPW_LOG2 4
79 #define LE_MC_NBPW (1 << LE_MC_NBPW_LOG2)
80
81 #if !defined(LE_NOLEMAC)
82 /*
83 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
84 *
85 * Start of DEC EtherWORKS III (LEMAC) dependent structures
86 *
87 */
88 #include <i386/isa/ic/lemac.h> /* Include LEMAC definitions */
89
90 static int lemac_probe(le_softc_t *sc, const le_board_t *bd, int *msize);
91
92 struct le_lemac_info {
93 u_int lemac__lastpage; /* last 2K page */
94 u_int lemac__memmode; /* Are we in 2K, 32K, or 64K mode */
95 u_int lemac__membase; /* Physical address of start of RAM */
96 u_int lemac__txctl; /* Transmit Control Byte */
97 u_int lemac__txmax; /* Maximum # of outstanding transmits */
98 le_mcbits_t lemac__mctbl[LEMAC_MCTBL_SIZE/sizeof(le_mcbits_t)];
99 /* local copy of multicast table */
100 u_char lemac__eeprom[LEMAC_EEP_SIZE]; /* local copy eeprom */
101 char lemac__prodname[LEMAC_EEP_PRDNMSZ+1]; /* prodname name */
102 #define lemac_lastpage le_un.un_lemac.lemac__lastpage
103 #define lemac_memmode le_un.un_lemac.lemac__memmode
104 #define lemac_membase le_un.un_lemac.lemac__membase
105 #define lemac_txctl le_un.un_lemac.lemac__txctl
106 #define lemac_txmax le_un.un_lemac.lemac__txmax
107 #define lemac_mctbl le_un.un_lemac.lemac__mctbl
108 #define lemac_eeprom le_un.un_lemac.lemac__eeprom
109 #define lemac_prodname le_un.un_lemac.lemac__prodname
110 };
111 #endif /* !defined(LE_NOLEMAC) */
112
113 #if !defined(LE_NOLANCE)
114 /*
115 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
116 *
117 * Start of DEC EtherWORKS II (LANCE) dependent structures
118 *
119 */
120
121 #include <i386/isa/ic/am7990.h>
122
123 #ifndef LN_DOSTATS
124 #define LN_DOSTATS 1
125 #endif
126
127 static int depca_probe(le_softc_t *sc, const le_board_t *bd, int *msize);
128
129 typedef struct lance_descinfo lance_descinfo_t;
130 typedef struct lance_ring lance_ring_t;
131
132 typedef unsigned lance_addr_t;
133
134 struct lance_descinfo {
135 caddr_t di_addr; /* address of descriptor */
136 lance_addr_t di_bufaddr; /* LANCE address of buffer owned by descriptor */
137 unsigned di_buflen; /* size of buffer owned by descriptor */
138 struct mbuf *di_mbuf; /* mbuf being transmitted/received */
139 };
140
141 struct lance_ring {
142 lance_descinfo_t *ri_first; /* Pointer to first descriptor in ring */
143 lance_descinfo_t *ri_last; /* Pointer to last + 1 descriptor in ring */
144 lance_descinfo_t *ri_nextin; /* Pointer to next one to be given to HOST */
145 lance_descinfo_t *ri_nextout; /* Pointer to next one to be given to LANCE */
146 unsigned ri_max; /* Size of Ring - 1 */
147 unsigned ri_free; /* Number of free rings entires (owned by HOST) */
148 lance_addr_t ri_heap; /* Start of RAM for this ring */
149 lance_addr_t ri_heapend; /* End + 1 of RAM for this ring */
150 lance_addr_t ri_outptr; /* Pointer to first output byte */
151 unsigned ri_outsize; /* Space remaining for output */
152 };
153
154 struct le_lance_info {
155 unsigned lance__csr1; /* LANCE Address of init block (low 16) */
156 unsigned lance__csr2; /* LANCE Address of init block (high 8) */
157 unsigned lance__csr3; /* Copy of CSR3 */
158 unsigned lance__rap; /* IO Port Offset of RAP */
159 unsigned lance__rdp; /* IO Port Offset of RDP */
160 unsigned lance__ramoffset; /* Offset to valid LANCE RAM */
161 unsigned lance__ramsize; /* Amount of RAM shared by LANCE */
162 unsigned lance__rxbufsize; /* Size of a receive buffer */
163 ln_initb_t lance__initb; /* local copy of LANCE initblock */
164 ln_initb_t *lance__raminitb; /* copy to board's LANCE initblock (debugging) */
165 ln_desc_t *lance__ramdesc; /* copy to board's LANCE descriptors (debugging) */
166 lance_ring_t lance__rxinfo; /* Receive ring information */
167 lance_ring_t lance__txinfo; /* Transmit ring information */
168 #define lance_csr1 le_un.un_lance.lance__csr1
169 #define lance_csr2 le_un.un_lance.lance__csr2
170 #define lance_csr3 le_un.un_lance.lance__csr3
171 #define lance_rap le_un.un_lance.lance__rap
172 #define lance_rdp le_un.un_lance.lance__rdp
173 #define lance_ramoffset le_un.un_lance.lance__ramoffset
174 #define lance_ramsize le_un.un_lance.lance__ramsize
175 #define lance_rxbufsize le_un.un_lance.lance__rxbufsize
176 #define lance_initb le_un.un_lance.lance__initb
177 #define lance_raminitb le_un.un_lance.lance__raminitb
178 #define lance_ramdesc le_un.un_lance.lance__ramdesc
179 #define lance_rxinfo le_un.un_lance.lance__rxinfo
180 #define lance_txinfo le_un.un_lance.lance__txinfo
181 };
182 #endif /* !defined(LE_NOLANCE) */
183
184 /*
185 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
186 *
187 * Start of Common Code
188 *
189 */
190
191 static void (*le_intrvec[NLE])(le_softc_t *sc);
192
193 /*
194 * Ethernet status, per interface.
195 */
196 struct le_softc {
197 struct arpcom le_ac; /* Common Ethernet/ARP Structure */
198 void (*if_init)(le_softc_t *);/* Interface init routine */
199 void (*if_reset)(le_softc_t *);/* Interface reset routine */
200 caddr_t le_membase; /* Starting memory address (virtual) */
201 unsigned le_iobase; /* Starting I/O base address */
202 unsigned le_irq; /* Interrupt Request Value */
203 unsigned le_flags; /* local copy of if_flags */
204 #define LE_BRDCSTONLY 0x01000000 /* If only broadcast is enabled */
205 u_int le_mcmask; /* bit mask for CRC-32 for multicast hash */
206 le_mcbits_t *le_mctbl; /* pointer to multicast table */
207 const char *le_prodname; /* product name DE20x-xx */
208 u_char le_hwaddr[6]; /* local copy of hwaddr */
209 union {
210 #if !defined(LE_NOLEMAC)
211 struct le_lemac_info un_lemac; /* LEMAC specific information */
212 #endif
213 #if !defined(LE_NOLANCE)
214 struct le_lance_info un_lance; /* Am7990 specific information */
215 #endif
216 } le_un;
217 };
218 #define le_if le_ac.ac_if
219
220
221 static int le_probe(struct isa_device *dvp);
222 static int le_attach(struct isa_device *dvp);
223 static ointhand2_t le_intr;
224 static int le_ioctl(struct ifnet *ifp, u_long command, caddr_t data);
225 static void le_input(le_softc_t *sc, caddr_t seg1, size_t total_len,
226 size_t len2, caddr_t seg2);
227 static void le_multi_filter(le_softc_t *sc);
228 static void le_multi_op(le_softc_t *sc, const u_char *mca, int oper_flg);
229 static int le_read_macaddr(le_softc_t *sc, int ioreg, int skippat);
230
231 #define LE_CRC32_POLY 0xEDB88320UL /* CRC-32 Poly -- Little Endian */
232
233 struct le_board {
234 int (*bd_probe)(le_softc_t *sc, const le_board_t *bd, int *msize);
235 };
236
237
238 static le_softc_t le_softc[NLE];
239
240 static const le_board_t le_boards[] = {
241 #if !defined(LE_NOLEMAC)
242 { lemac_probe }, /* DE20[345] */
243 #endif
244 #if !defined(LE_NOLANCE)
245 { depca_probe }, /* DE{20[012],422} */
246 #endif
247 { NULL } /* Must Be Last! */
248 };
249
250 /*
251 * This tells the autoconf code how to set us up.
252 */
253 struct isa_driver ledriver = {
254 INTR_TYPE_NET,
255 le_probe,
256 le_attach,
257 "le",
258 };
259 COMPAT_ISA_DRIVER(le, ledriver);
260
261 static unsigned le_intrs[NLE];
262
263 #define LE_ADDREQUAL(a1, a2) \
264 (((u_short *)a1)[0] == ((u_short *)a2)[0] \
265 || ((u_short *)a1)[1] == ((u_short *)a2)[1] \
266 || ((u_short *)a1)[2] == ((u_short *)a2)[2])
267 #define LE_ADDRBRDCST(a1) \
268 (((u_short *)a1)[0] == 0xFFFFU \
269 || ((u_short *)a1)[1] == 0xFFFFU \
270 || ((u_short *)a1)[2] == 0xFFFFU)
271
272 #define LE_INL(sc, reg) \
273 ({ u_int data; \
274 __asm __volatile("inl %1, %0": "=a" (data): "d" ((u_short)((sc)->le_iobase + (reg)))); \
275 data; })
276
277
278 #define LE_OUTL(sc, reg, data) \
279 ({__asm __volatile("outl %0, %1"::"a" ((u_int)(data)), "d" ((u_short)((sc)->le_iobase + (reg))));})
280
281 #define LE_INW(sc, reg) \
282 ({ u_short data; \
283 __asm __volatile("inw %1, %0": "=a" (data): "d" ((u_short)((sc)->le_iobase + (reg)))); \
284 data; })
285
286
287 #define LE_OUTW(sc, reg, data) \
288 ({__asm __volatile("outw %0, %1"::"a" ((u_short)(data)), "d" ((u_short)((sc)->le_iobase + (reg))));})
289
290 #define LE_INB(sc, reg) \
291 ({ u_char data; \
292 __asm __volatile("inb %1, %0": "=a" (data): "d" ((u_short)((sc)->le_iobase + (reg)))); \
293 data; })
294
295
296 #define LE_OUTB(sc, reg, data) \
297 ({__asm __volatile("outb %0, %1"::"a" ((u_char)(data)), "d" ((u_short)((sc)->le_iobase + (reg))));})
298
299 #define MEMCPY(to, from, len) bcopy(from, to, len)
300 #define MEMSET(where, what, howmuch) bzero(where, howmuch)
301 #define MEMCMP(l, r, len) bcmp(l, r, len)
302
303
304 static int
305 le_probe(
306 struct isa_device *dvp)
307 {
308 le_softc_t *sc = &le_softc[dvp->id_unit];
309 const le_board_t *bd;
310 int iospace;
311
312 if (dvp->id_unit >= NLE) {
313 printf("%s%d not configured -- too many devices\n",
314 ledriver.name, dvp->id_unit);
315 return 0;
316 }
317
318 sc->le_iobase = dvp->id_iobase;
319 sc->le_membase = (u_char *) dvp->id_maddr;
320 sc->le_irq = dvp->id_irq;
321 sc->le_if.if_name = (char *)(uintptr_t)(const void *)ledriver.name;
322 sc->le_if.if_unit = dvp->id_unit;
323
324 /*
325 * Find and Initialize board..
326 */
327
328 sc->le_flags &= ~(IFF_UP|IFF_ALLMULTI);
329
330 for (bd = le_boards; bd->bd_probe != NULL; bd++) {
331 if ((iospace = (*bd->bd_probe)(sc, bd, &dvp->id_msize)) != 0) {
332 return iospace;
333 }
334 }
335
336 return 0;
337 }
338
339 static int
340 le_attach(
341 struct isa_device *dvp)
342 {
343 le_softc_t *sc = &le_softc[dvp->id_unit];
344 struct ifnet *ifp = &sc->le_if;
345
346 dvp->id_ointr = le_intr;
347 ifp->if_softc = sc;
348 ifp->if_mtu = ETHERMTU;
349 if_printf(ifp, "%s ethernet address %6D\n",
350 sc->le_prodname,
351 sc->le_ac.ac_enaddr, ":");
352
353 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
354 ifp->if_ioctl = le_ioctl;
355 ifp->if_type = IFT_ETHER;
356 ifp->if_addrlen = 6;
357 ifp->if_hdrlen = 14;
358
359 ether_ifattach(ifp, sc->le_ac.ac_enaddr);
360
361 return 1;
362 }
363
364 static void
365 le_intr(
366 int unit)
367 {
368 int s = splimp();
369
370 le_intrs[unit]++;
371 (*le_intrvec[unit])(&le_softc[unit]);
372
373 splx(s);
374 }
375
376 #define LE_XTRA 0
377
378 static void
379 le_input(
380 le_softc_t *sc,
381 caddr_t seg1,
382 size_t total_len,
383 size_t len1,
384 caddr_t seg2)
385 {
386 struct ifnet *ifp = &sc->le_if;
387 struct mbuf *m;
388
389 MGETHDR(m, M_DONTWAIT, MT_DATA);
390 if (m == NULL) {
391 ifp->if_ierrors++;
392 return;
393 }
394 m->m_pkthdr.len = total_len;
395 m->m_pkthdr.rcvif = ifp;
396 if (total_len + LE_XTRA > MHLEN /* >= MINCLSIZE */) {
397 MCLGET(m, M_DONTWAIT);
398 if ((m->m_flags & M_EXT) == 0) {
399 m_free(m);
400 ifp->if_ierrors++;
401 return;
402 }
403 } else if (total_len + LE_XTRA > MHLEN && MINCLSIZE == (MHLEN+MLEN)) {
404 MGET(m->m_next, M_DONTWAIT, MT_DATA);
405 if (m->m_next == NULL) {
406 m_free(m);
407 ifp->if_ierrors++;
408 return;
409 }
410 m->m_next->m_len = total_len - MHLEN - LE_XTRA;
411 len1 = total_len = MHLEN - LE_XTRA;
412 MEMCPY(mtod(m->m_next, caddr_t), &seg1[MHLEN-LE_XTRA], m->m_next->m_len);
413 } else if (total_len + LE_XTRA > MHLEN) {
414 panic("le_input: pkt of unknown length");
415 }
416 m->m_data += LE_XTRA;
417 m->m_len = total_len;
418 MEMCPY(mtod(m, caddr_t), seg1, len1);
419 if (seg2 != NULL)
420 MEMCPY(mtod(m, caddr_t) + len1, seg2, total_len - len1);
421
422 (*ifp->if_input)(ifp, m);
423 }
424
425 static int
426 le_ioctl(
427 struct ifnet *ifp,
428 u_long cmd,
429 caddr_t data)
430 {
431 le_softc_t *sc = ifp->if_softc;
432 int s, error = 0;
433
434 if ((sc->le_flags & IFF_UP) == 0)
435 return EIO;
436
437 s = splimp();
438
439 switch (cmd) {
440 case SIOCSIFFLAGS: {
441 sc->if_init(sc);
442 break;
443 }
444
445 case SIOCADDMULTI:
446 case SIOCDELMULTI:
447 /*
448 * Update multicast listeners
449 */
450 sc->if_init(sc);
451 error = 0;
452 break;
453
454 default: {
455 error = ether_ioctl(ifp, cmd, data);
456 break;
457 }
458 }
459
460 splx(s);
461 return error;
462 }
463
464 /*
465 * This is the standard method of reading the DEC Address ROMS.
466 * I don't understand it but it does work.
467 */
468 static int
469 le_read_macaddr(
470 le_softc_t *sc,
471 int ioreg,
472 int skippat)
473 {
474 int cksum, rom_cksum;
475
476 if (!skippat) {
477 int idx, idx2, found, octet;
478 static u_char testpat[] = { 0xFF, 0, 0x55, 0xAA, 0xFF, 0, 0x55, 0xAA };
479 idx2 = found = 0;
480
481 for (idx = 0; idx < 32; idx++) {
482 octet = LE_INB(sc, ioreg);
483
484 if (octet == testpat[idx2]) {
485 if (++idx2 == sizeof testpat) {
486 ++found;
487 break;
488 }
489 } else {
490 idx2 = 0;
491 }
492 }
493
494 if (!found)
495 return -1;
496 }
497
498 cksum = 0;
499 sc->le_hwaddr[0] = LE_INB(sc, ioreg);
500 sc->le_hwaddr[1] = LE_INB(sc, ioreg);
501
502 cksum = *(u_short *) &sc->le_hwaddr[0];
503
504 sc->le_hwaddr[2] = LE_INB(sc, ioreg);
505 sc->le_hwaddr[3] = LE_INB(sc, ioreg);
506 cksum *= 2;
507 if (cksum > 65535) cksum -= 65535;
508 cksum += *(u_short *) &sc->le_hwaddr[2];
509 if (cksum > 65535) cksum -= 65535;
510
511 sc->le_hwaddr[4] = LE_INB(sc, ioreg);
512 sc->le_hwaddr[5] = LE_INB(sc, ioreg);
513 cksum *= 2;
514 if (cksum > 65535) cksum -= 65535;
515 cksum += *(u_short *) &sc->le_hwaddr[4];
516 if (cksum >= 65535) cksum -= 65535;
517
518 rom_cksum = LE_INB(sc, ioreg);
519 rom_cksum |= LE_INB(sc, ioreg) << 8;
520
521 if (cksum != rom_cksum)
522 return -1;
523 return 0;
524 }
525
526 static void
527 le_multi_filter(
528 le_softc_t *sc)
529 {
530 struct ifmultiaddr *ifma;
531
532 MEMSET(sc->le_mctbl, 0, (sc->le_mcmask + 1) / 8);
533
534 if (sc->le_if.if_flags & IFF_ALLMULTI) {
535 sc->le_flags |= IFF_MULTICAST|IFF_ALLMULTI;
536 return;
537 }
538 sc->le_flags &= ~IFF_MULTICAST;
539 /* if (interface has had an address assigned) { */
540 le_multi_op(sc, etherbroadcastaddr, TRUE);
541 sc->le_flags |= LE_BRDCSTONLY|IFF_MULTICAST;
542 /* } */
543
544 sc->le_flags |= IFF_MULTICAST;
545
546 TAILQ_FOREACH(ifma, &sc->le_ac.ac_if.if_multiaddrs, ifma_link) {
547 if (ifma->ifma_addr->sa_family != AF_LINK)
548 continue;
549
550 le_multi_op(sc, LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 1);
551 sc->le_flags &= ~LE_BRDCSTONLY;
552 }
553 }
554
555 static void
556 le_multi_op(
557 le_softc_t *sc,
558 const u_char *mca,
559 int enable)
560 {
561 u_int idx, bit, data, crc = 0xFFFFFFFFUL;
562
563 #ifdef __alpha
564 for (data = *(__unaligned u_long *) mca, bit = 0; bit < 48; bit++, data >>=
565 1)
566 crc = (crc >> 1) ^ (((crc ^ data) & 1) ? LE_CRC32_POLY : 0);
567 #else
568 for (idx = 0; idx < 6; idx++)
569 for (data = *mca++, bit = 0; bit < 8; bit++, data >>= 1)
570 crc = (crc >> 1) ^ (((crc ^ data) & 1) ? LE_CRC32_POLY : 0);
571 #endif
572 /*
573 * The following two line convert the N bit index into a longword index
574 * and a longword mask.
575 */
576 crc &= sc->le_mcmask;
577 bit = 1 << (crc & (LE_MC_NBPW -1));
578 idx = crc >> (LE_MC_NBPW_LOG2);
579
580 /*
581 * Set or clear hash filter bit in our table.
582 */
583 if (enable) {
584 sc->le_mctbl[idx] |= bit; /* Set Bit */
585 } else {
586 sc->le_mctbl[idx] &= ~bit; /* Clear Bit */
587 }
588 }
589
590 #if !defined(LE_NOLEMAC)
591 /*
592 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
593 *
594 * Start of DEC EtherWORKS III (LEMAC) dependent code
595 *
596 */
597
598 #define LEMAC_INTR_ENABLE(sc) \
599 LE_OUTB(sc, LEMAC_REG_IC, LE_INB(sc, LEMAC_REG_IC) | LEMAC_IC_ALL)
600
601 #define LEMAC_INTR_DISABLE(sc) \
602 LE_OUTB(sc, LEMAC_REG_IC, LE_INB(sc, LEMAC_REG_IC) & ~LEMAC_IC_ALL)
603
604 #define LEMAC_64K_MODE(mbase) (((mbase) >= 0x0A) && ((mbase) <= 0x0F))
605 #define LEMAC_32K_MODE(mbase) (((mbase) >= 0x14) && ((mbase) <= 0x1F))
606 #define LEMAC_2K_MODE(mbase) ( (mbase) >= 0x40)
607
608 static void lemac_init(le_softc_t *sc);
609 static void lemac_start(struct ifnet *ifp);
610 static void lemac_reset(le_softc_t *sc);
611 static void lemac_intr(le_softc_t *sc);
612 static void lemac_rne_intr(le_softc_t *sc);
613 static void lemac_tne_intr(le_softc_t *sc);
614 static void lemac_txd_intr(le_softc_t *sc, unsigned cs_value);
615 static void lemac_rxd_intr(le_softc_t *sc, unsigned cs_value);
616 static int lemac_read_eeprom(le_softc_t *sc);
617 static void lemac_init_adapmem(le_softc_t *sc);
618
619 #define LE_MCBITS_ALL_1S ((le_mcbits_t)~(le_mcbits_t)0)
620
621 static const le_mcbits_t lemac_allmulti_mctbl[16] = {
622 LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S,
623 LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S,
624 LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S,
625 LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S, LE_MCBITS_ALL_1S,
626 };
627 /*
628 * An IRQ mapping table. Less space than switch statement.
629 */
630 static const int lemac_irqs[] = { IRQ5, IRQ10, IRQ11, IRQ15 };
631
632 /*
633 * Some tuning/monitoring variables.
634 */
635 static unsigned lemac_deftxmax = 16; /* see lemac_max above */
636 static unsigned lemac_txnospc = 0; /* total # of tranmit starvations */
637
638 static unsigned lemac_tne_intrs = 0; /* total # of tranmit done intrs */
639 static unsigned lemac_rne_intrs = 0; /* total # of receive done intrs */
640 static unsigned lemac_txd_intrs = 0; /* total # of tranmit error intrs */
641 static unsigned lemac_rxd_intrs = 0; /* total # of receive error intrs */
642
643
644 static int
645 lemac_probe(
646 le_softc_t *sc,
647 const le_board_t *bd,
648 int *msize)
649 {
650 int irq, portval;
651
652 LE_OUTB(sc, LEMAC_REG_IOP, LEMAC_IOP_EEINIT);
653 DELAY(LEMAC_EEP_DELAY);
654
655 /*
656 * Read Ethernet address if card is present.
657 */
658 if (le_read_macaddr(sc, LEMAC_REG_APD, 0) < 0)
659 return 0;
660
661 MEMCPY(sc->le_ac.ac_enaddr, sc->le_hwaddr, 6);
662 /*
663 * Clear interrupts and set IRQ.
664 */
665
666 portval = LE_INB(sc, LEMAC_REG_IC) & LEMAC_IC_IRQMSK;
667 irq = lemac_irqs[portval >> 5];
668 LE_OUTB(sc, LEMAC_REG_IC, portval);
669
670 /*
671 * Make sure settings match.
672 */
673
674 if (irq != sc->le_irq) {
675 if_printf(&sc->le_if,
676 "lemac configuration error: expected IRQ 0x%x actual 0x%x\n",
677 sc->le_irq, irq);
678 return 0;
679 }
680
681 /*
682 * Try to reset the unit
683 */
684 sc->if_init = lemac_init;
685 sc->le_if.if_start = lemac_start;
686 sc->if_reset = lemac_reset;
687 sc->lemac_memmode = 2;
688 sc->if_reset(sc);
689 if ((sc->le_flags & IFF_UP) == 0)
690 return 0;
691
692 /*
693 * Check for correct memory base configuration.
694 */
695 if (vtophys(sc->le_membase) != sc->lemac_membase) {
696 if_printf(&sc->le_if,
697 "lemac configuration error: expected iomem 0x%x actual 0x%x\n",
698 vtophys(sc->le_membase), sc->lemac_membase);
699 return 0;
700 }
701
702 sc->le_prodname = sc->lemac_prodname;
703 sc->le_mctbl = sc->lemac_mctbl;
704 sc->le_mcmask = (1 << LEMAC_MCTBL_BITS) - 1;
705 sc->lemac_txmax = lemac_deftxmax;
706 *msize = 2048;
707 le_intrvec[sc->le_if.if_unit] = lemac_intr;
708
709 return LEMAC_IOSPACE;
710 }
711
712 /*
713 * Do a hard reset of the board;
714 */
715 static void
716 lemac_reset(
717 le_softc_t *sc)
718 {
719 int portval, cksum;
720
721 /*
722 * Initialize board..
723 */
724
725 sc->le_flags &= IFF_UP;
726 sc->le_if.if_flags &= ~IFF_OACTIVE;
727 LEMAC_INTR_DISABLE(sc);
728
729 LE_OUTB(sc, LEMAC_REG_IOP, LEMAC_IOP_EEINIT);
730 DELAY(LEMAC_EEP_DELAY);
731
732 /* Disable Interrupts */
733 /* LE_OUTB(sc, LEMAC_REG_IC, LE_INB(sc, LEMAC_REG_IC) & ICR_IRQ_SEL); */
734
735 /*
736 * Read EEPROM information. NOTE - the placement of this function
737 * is important because functions hereafter may rely on information
738 * read from the EEPROM.
739 */
740 if ((cksum = lemac_read_eeprom(sc)) != LEMAC_EEP_CKSUM) {
741 if_printf(&sc->le_if, "reset: EEPROM checksum failed (0x%x)\n", cksum);
742 return;
743 }
744
745 /*
746 * Force to 2K mode if not already configured.
747 */
748
749 portval = LE_INB(sc, LEMAC_REG_MBR);
750 if (!LEMAC_2K_MODE(portval)) {
751 if (LEMAC_64K_MODE(portval)) {
752 portval = (((portval * 2) & 0xF) << 4);
753 sc->lemac_memmode = 64;
754 } else if (LEMAC_32K_MODE(portval)) {
755 portval = ((portval & 0xF) << 4);
756 sc->lemac_memmode = 32;
757 }
758 LE_OUTB(sc, LEMAC_REG_MBR, portval);
759 }
760 sc->lemac_membase = portval * (2 * 1024) + (512 * 1024);
761
762 /*
763 * Initialize Free Memory Queue, Init mcast table with broadcast.
764 */
765
766 lemac_init_adapmem(sc);
767 sc->le_flags |= IFF_UP;
768 return;
769 }
770
771 static void
772 lemac_init(
773 le_softc_t *sc)
774 {
775 int s;
776
777 if ((sc->le_flags & IFF_UP) == 0)
778 return;
779
780 s = splimp();
781
782 /*
783 * If the interface has the up flag
784 */
785 if (sc->le_if.if_flags & IFF_UP) {
786 int saved_cs = LE_INB(sc, LEMAC_REG_CS);
787 LE_OUTB(sc, LEMAC_REG_CS, saved_cs | (LEMAC_CS_TXD | LEMAC_CS_RXD));
788 LE_OUTB(sc, LEMAC_REG_PA0, sc->le_ac.ac_enaddr[0]);
789 LE_OUTB(sc, LEMAC_REG_PA1, sc->le_ac.ac_enaddr[1]);
790 LE_OUTB(sc, LEMAC_REG_PA2, sc->le_ac.ac_enaddr[2]);
791 LE_OUTB(sc, LEMAC_REG_PA3, sc->le_ac.ac_enaddr[3]);
792 LE_OUTB(sc, LEMAC_REG_PA4, sc->le_ac.ac_enaddr[4]);
793 LE_OUTB(sc, LEMAC_REG_PA5, sc->le_ac.ac_enaddr[5]);
794
795 LE_OUTB(sc, LEMAC_REG_IC, LE_INB(sc, LEMAC_REG_IC) | LEMAC_IC_IE);
796
797 if (sc->le_if.if_flags & IFF_PROMISC) {
798 LE_OUTB(sc, LEMAC_REG_CS, LEMAC_CS_MCE | LEMAC_CS_PME);
799 } else {
800 LEMAC_INTR_DISABLE(sc);
801 le_multi_filter(sc);
802 LE_OUTB(sc, LEMAC_REG_MPN, 0);
803 if ((sc->le_flags | sc->le_if.if_flags) & IFF_ALLMULTI) {
804 MEMCPY(&sc->le_membase[LEMAC_MCTBL_OFF], lemac_allmulti_mctbl, sizeof(lemac_allmulti_mctbl));
805 } else {
806 MEMCPY(&sc->le_membase[LEMAC_MCTBL_OFF], sc->lemac_mctbl, sizeof(sc->lemac_mctbl));
807 }
808 LE_OUTB(sc, LEMAC_REG_CS, LEMAC_CS_MCE);
809 }
810
811 LE_OUTB(sc, LEMAC_REG_CTL, LE_INB(sc, LEMAC_REG_CTL) ^ LEMAC_CTL_LED);
812
813 LEMAC_INTR_ENABLE(sc);
814 sc->le_if.if_flags |= IFF_RUNNING;
815 } else {
816 LE_OUTB(sc, LEMAC_REG_CS, LEMAC_CS_RXD|LEMAC_CS_TXD);
817
818 LEMAC_INTR_DISABLE(sc);
819 sc->le_if.if_flags &= ~IFF_RUNNING;
820 }
821 splx(s);
822 }
823
824 /*
825 * What to do upon receipt of an interrupt.
826 */
827 static void
828 lemac_intr(
829 le_softc_t *sc)
830 {
831 int cs_value;
832
833 LEMAC_INTR_DISABLE(sc); /* Mask interrupts */
834
835 /*
836 * Determine cause of interrupt. Receive events take
837 * priority over Transmit.
838 */
839
840 cs_value = LE_INB(sc, LEMAC_REG_CS);
841
842 /*
843 * Check for Receive Queue not being empty.
844 * Check for Transmit Done Queue not being empty.
845 */
846
847 if (cs_value & LEMAC_CS_RNE)
848 lemac_rne_intr(sc);
849 if (cs_value & LEMAC_CS_TNE)
850 lemac_tne_intr(sc);
851
852 /*
853 * Check for Transmitter Disabled.
854 * Check for Receiver Disabled.
855 */
856
857 if (cs_value & LEMAC_CS_TXD)
858 lemac_txd_intr(sc, cs_value);
859 if (cs_value & LEMAC_CS_RXD)
860 lemac_rxd_intr(sc, cs_value);
861
862 /*
863 * Toggle LED and unmask interrupts.
864 */
865
866 LE_OUTB(sc, LEMAC_REG_CTL, LE_INB(sc, LEMAC_REG_CTL) ^ LEMAC_CTL_LED);
867 LEMAC_INTR_ENABLE(sc); /* Unmask interrupts */
868 }
869
870 static void
871 lemac_rne_intr(
872 le_softc_t *sc)
873 {
874 int rxcount, rxlen, rxpg;
875 u_char *rxptr;
876
877 lemac_rne_intrs++;
878 rxcount = LE_INB(sc, LEMAC_REG_RQC);
879 while (rxcount--) {
880 rxpg = LE_INB(sc, LEMAC_REG_RQ);
881 LE_OUTB(sc, LEMAC_REG_MPN, rxpg);
882
883 rxptr = sc->le_membase;
884 sc->le_if.if_ipackets++;
885 if (*rxptr & LEMAC_RX_OK) {
886
887 /*
888 * Get receive length - subtract out checksum.
889 */
890
891 rxlen = ((*(u_int *)rxptr >> 8) & 0x7FF) - 4;
892 le_input(sc, rxptr + sizeof(u_int), rxlen, rxlen, NULL);
893 } else { /* end if (*rxptr & LEMAC_RX_OK) */
894 sc->le_if.if_ierrors++;
895 }
896 LE_OUTB(sc, LEMAC_REG_FMQ, rxpg); /* Return this page to Free Memory Queue */
897 } /* end while (recv_count--) */
898
899 return;
900 }
901
902 static void
903 lemac_rxd_intr(
904 le_softc_t *sc,
905 unsigned cs_value)
906 {
907 /*
908 * Handle CS_RXD (Receiver disabled) here.
909 *
910 * Check Free Memory Queue Count. If not equal to zero
911 * then just turn Receiver back on. If it is equal to
912 * zero then check to see if transmitter is disabled.
913 * Process transmit TXD loop once more. If all else
914 * fails then do software init (0xC0 to EEPROM Init)
915 * and rebuild Free Memory Queue.
916 */
917
918 lemac_rxd_intrs++;
919
920 /*
921 * Re-enable Receiver.
922 */
923
924 cs_value &= ~LEMAC_CS_RXD;
925 LE_OUTB(sc, LEMAC_REG_CS, cs_value);
926
927 if (LE_INB(sc, LEMAC_REG_FMC) > 0)
928 return;
929
930 if (cs_value & LEMAC_CS_TXD)
931 lemac_txd_intr(sc, cs_value);
932
933 if ((LE_INB(sc, LEMAC_REG_CS) & LEMAC_CS_RXD) == 0)
934 return;
935
936 if_printf(&sc->le_if, "fatal RXD error, attempting recovery\n");
937
938 sc->if_reset(sc);
939 if (sc->le_flags & IFF_UP) {
940 lemac_init(sc);
941 return;
942 }
943
944 /*
945 * Error during initializion. Mark card as disabled.
946 */
947 if_printf(&sc->le_if, "recovery failed -- board disabled\n");
948 return;
949 }
950
951 static void
952 lemac_start(
953 struct ifnet *ifp)
954 {
955 le_softc_t *sc = (le_softc_t *) ifp;
956 struct ifqueue *ifq = &ifp->if_snd;
957
958 if ((ifp->if_flags & IFF_RUNNING) == 0)
959 return;
960
961 LEMAC_INTR_DISABLE(sc);
962
963 while (ifq->ifq_head != NULL) {
964 struct mbuf *m;
965 int tx_pg;
966 u_int txhdr, txoff;
967
968 if (LE_INB(sc, LEMAC_REG_TQC) >= sc->lemac_txmax) {
969 ifp->if_flags |= IFF_OACTIVE;
970 break;
971 }
972
973 tx_pg = LE_INB(sc, LEMAC_REG_FMQ); /* get free memory page */
974 /*
975 * Check for good transmit page.
976 */
977 if (tx_pg == 0 || tx_pg > sc->lemac_lastpage) {
978 lemac_txnospc++;
979 ifp->if_flags |= IFF_OACTIVE;
980 break;
981 }
982
983 IF_DEQUEUE(ifq, m);
984 LE_OUTB(sc, LEMAC_REG_MPN, tx_pg); /* Shift 2K window. */
985
986 /*
987 * The first four bytes of each transmit buffer are for
988 * control information. The first byte is the control
989 * byte, then the length (why not word aligned?), then
990 * the off to the buffer.
991 */
992
993 txoff = (mtod(m, u_int) & (sizeof(u_long) - 1)) + LEMAC_TX_HDRSZ;
994 txhdr = sc->lemac_txctl | (m->m_pkthdr.len << 8) | (txoff << 24);
995 *(u_int *) sc->le_membase = txhdr;
996
997 /*
998 * Copy the packet to the board
999 */
1000
1001 m_copydata(m, 0, m->m_pkthdr.len, sc->le_membase + txoff);
1002
1003 LE_OUTB(sc, LEMAC_REG_TQ, tx_pg); /* tell chip to transmit this packet */
1004
1005 BPF_MTAP(&sc->le_if, m);
1006
1007 m_freem(m); /* free the mbuf */
1008 }
1009 LEMAC_INTR_ENABLE(sc);
1010 }
1011
1012 static void
1013 lemac_tne_intr(
1014 le_softc_t *sc)
1015 {
1016 int txsts, txcount = LE_INB(sc, LEMAC_REG_TDC);
1017
1018 lemac_tne_intrs++;
1019 while (txcount--) {
1020 txsts = LE_INB(sc, LEMAC_REG_TDQ);
1021 sc->le_if.if_opackets++; /* another one done */
1022 if ((txsts & LEMAC_TDQ_COL) != LEMAC_TDQ_NOCOL)
1023 sc->le_if.if_collisions++;
1024 }
1025 sc->le_if.if_flags &= ~IFF_OACTIVE;
1026 lemac_start(&sc->le_if);
1027 }
1028
1029 static void
1030 lemac_txd_intr(
1031 le_softc_t *sc,
1032 unsigned cs_value)
1033 {
1034 /*
1035 * Read transmit status, remove transmit buffer from
1036 * transmit queue and place on free memory queue,
1037 * then reset transmitter.
1038 * Increment appropriate counters.
1039 */
1040
1041 lemac_txd_intrs++;
1042 sc->le_if.if_oerrors++;
1043 if (LE_INB(sc, LEMAC_REG_TS) & LEMAC_TS_ECL)
1044 sc->le_if.if_collisions++;
1045 sc->le_if.if_flags &= ~IFF_OACTIVE;
1046
1047 LE_OUTB(sc, LEMAC_REG_FMQ, LE_INB(sc, LEMAC_REG_TQ));
1048 /* Get Page number and write it back out */
1049
1050 LE_OUTB(sc, LEMAC_REG_CS, cs_value & ~LEMAC_CS_TXD);
1051 /* Turn back on transmitter */
1052 return;
1053 }
1054
1055 static int
1056 lemac_read_eeprom(
1057 le_softc_t *sc)
1058 {
1059 int word_off, cksum;
1060
1061 u_char *ep;
1062
1063 cksum = 0;
1064 ep = sc->lemac_eeprom;
1065 for (word_off = 0; word_off < LEMAC_EEP_SIZE / 2; word_off++) {
1066 LE_OUTB(sc, LEMAC_REG_PI1, word_off);
1067 LE_OUTB(sc, LEMAC_REG_IOP, LEMAC_IOP_EEREAD);
1068
1069 DELAY(LEMAC_EEP_DELAY);
1070
1071 *ep = LE_INB(sc, LEMAC_REG_EE1); cksum += *ep++;
1072 *ep = LE_INB(sc, LEMAC_REG_EE2); cksum += *ep++;
1073 }
1074
1075 /*
1076 * Set up Transmit Control Byte for use later during transmit.
1077 */
1078
1079 sc->lemac_txctl |= LEMAC_TX_FLAGS;
1080
1081 if ((sc->lemac_eeprom[LEMAC_EEP_SWFLAGS] & LEMAC_EEP_SW_SQE) == 0)
1082 sc->lemac_txctl &= ~LEMAC_TX_SQE;
1083
1084 if (sc->lemac_eeprom[LEMAC_EEP_SWFLAGS] & LEMAC_EEP_SW_LAB)
1085 sc->lemac_txctl |= LEMAC_TX_LAB;
1086
1087 MEMCPY(sc->lemac_prodname, &sc->lemac_eeprom[LEMAC_EEP_PRDNM], LEMAC_EEP_PRDNMSZ);
1088 sc->lemac_prodname[LEMAC_EEP_PRDNMSZ] = '\0';
1089
1090 return cksum % 256;
1091 }
1092
1093 static void
1094 lemac_init_adapmem(
1095 le_softc_t *sc)
1096 {
1097 int pg, conf;
1098
1099 conf = LE_INB(sc, LEMAC_REG_CNF);
1100
1101 if ((sc->lemac_eeprom[LEMAC_EEP_SETUP] & LEMAC_EEP_ST_DRAM) == 0) {
1102 sc->lemac_lastpage = 63;
1103 conf &= ~LEMAC_CNF_DRAM;
1104 } else {
1105 sc->lemac_lastpage = 127;
1106 conf |= LEMAC_CNF_DRAM;
1107 }
1108
1109 LE_OUTB(sc, LEMAC_REG_CNF, conf);
1110
1111 for (pg = 1; pg <= sc->lemac_lastpage; pg++)
1112 LE_OUTB(sc, LEMAC_REG_FMQ, pg);
1113
1114 return;
1115 }
1116 #endif /* !defined(LE_NOLEMAC) */
1117
1118 #if !defined(LE_NOLANCE)
1119 /*
1120 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
1121 *
1122 * Start of DEPCA (DE200/DE201/DE202/DE422 etal) support.
1123 *
1124 */
1125 static void depca_intr(le_softc_t *sc);
1126 static int lance_init_adapmem(le_softc_t *sc);
1127 static int lance_init_ring(le_softc_t *sc, ln_ring_t *rp, lance_ring_t *ri,
1128 unsigned ndescs, unsigned bufoffset,
1129 unsigned descoffset);
1130 static void lance_init(le_softc_t *sc);
1131 static void lance_reset(le_softc_t *sc);
1132 static void lance_intr(le_softc_t *sc);
1133 static int lance_rx_intr(le_softc_t *sc);
1134 static void lance_start(struct ifnet *ifp);
1135 static int lance_tx_intr(le_softc_t *sc);
1136
1137 #define LN_BUFSIZE /* 380 */ 304 /* 1520 / 4 */
1138 #define LN_TXDESC_RATIO 2048
1139 #define LN_DESC_MAX 128
1140
1141 #if LN_DOSTATS
1142 static struct {
1143 unsigned lance_rx_misses;
1144 unsigned lance_rx_badcrc;
1145 unsigned lance_rx_badalign;
1146 unsigned lance_rx_badframe;
1147 unsigned lance_rx_buferror;
1148 unsigned lance_tx_deferred;
1149 unsigned lance_tx_single_collisions;
1150 unsigned lance_tx_multiple_collisions;
1151 unsigned lance_tx_excessive_collisions;
1152 unsigned lance_tx_late_collisions;
1153
1154 unsigned lance_memory_errors;
1155 unsigned lance_inits;
1156 unsigned lance_tx_intrs;
1157 unsigned lance_tx_nospc[2];
1158 unsigned lance_tx_drains[2];
1159 unsigned lance_tx_orphaned;
1160 unsigned lance_tx_adoptions;
1161 unsigned lance_tx_emptied;
1162 unsigned lance_tx_deftxint;
1163 unsigned lance_tx_buferror;
1164 unsigned lance_high_txoutptr;
1165 unsigned lance_low_txheapsize;
1166 unsigned lance_low_txfree;
1167 unsigned lance_tx_intr_hidescs;
1168 /* unsigned lance_tx_intr_descs[LN_DESC_MAX]; */
1169
1170 unsigned lance_rx_intrs;
1171 unsigned lance_rx_badsop;
1172 unsigned lance_rx_contig;
1173 unsigned lance_rx_noncontig;
1174 unsigned lance_rx_intr_hidescs;
1175 unsigned lance_rx_ndescs[4096 / LN_BUFSIZE];
1176 /* unsigned lance_rx_intr_descs[LN_DESC_MAX]; */
1177 } lance_stats;
1178
1179 #define LN_STAT(stat) (lance_stats.lance_ ## stat)
1180 #define LN_MINSTAT(stat, val) (LN_STAT(stat > (val)) ? LN_STAT(stat = (val)) : 0)
1181 #define LN_MAXSTAT(stat, val) (LN_STAT(stat < (val)) ? LN_STAT(stat = (val)) : 0)
1182
1183 #else
1184 #define LN_STAT(stat) 0
1185 #define LN_MINSTAT(stat, val) 0
1186 #define LN_MAXSTAT(stat, val) 0
1187 #endif
1188
1189 #define LN_SELCSR(sc, csrno) (LE_OUTW(sc, sc->lance_rap, csrno))
1190 #define LN_INQCSR(sc) (LE_INW(sc, sc->lance_rap))
1191
1192 #define LN_WRCSR(sc, val) (LE_OUTW(sc, sc->lance_rdp, val))
1193 #define LN_RDCSR(sc) (LE_INW(sc, sc->lance_rdp))
1194
1195
1196 #define LN_ZERO(sc, vaddr, len) bzero(vaddr, len)
1197 #define LN_COPYTO(sc, from, to, len) bcopy(from, to, len)
1198
1199 #define LN_SETFLAG(sc, vaddr, val) \
1200 (((volatile u_char *) vaddr)[3] = (val))
1201
1202 #define LN_PUTDESC(sc, desc, vaddr) \
1203 (((volatile u_short *) vaddr)[0] = ((u_short *) desc)[0], \
1204 ((volatile u_short *) vaddr)[2] = ((u_short *) desc)[2], \
1205 ((volatile u_short *) vaddr)[1] = ((u_short *) desc)[1])
1206
1207 /*
1208 * Only get the descriptor flags and length/status. All else
1209 * read-only.
1210 */
1211 #define LN_GETDESC(sc, desc, vaddr) \
1212 (((u_short *) desc)[1] = ((volatile u_short *) vaddr)[1], \
1213 ((u_short *) desc)[3] = ((volatile u_short *) vaddr)[3])
1214
1215
1216 /*
1217 * These definitions are specific to the DEC "DEPCA-style" NICs.
1218 * (DEPCA, DE10x, DE20[012], DE422)
1219 *
1220 */
1221 #define DEPCA_REG_NICSR 0 /* (RW;16) NI Control / Status */
1222 #define DEPCA_REG_RDP 4 /* (RW:16) LANCE RDP (data) register */
1223 #define DEPCA_REG_RAP 6 /* (RW:16) LANCE RAP (address) register */
1224 #define DEPCA_REG_ADDRROM 12 /* (R : 8) DEPCA Ethernet Address ROM */
1225 #define DEPCA_IOSPACE 16 /* DEPCAs use 16 bytes of IO space */
1226
1227 #define DEPCA_NICSR_LED 0x0001 /* Light the LED on the back of the DEPCA */
1228 #define DEPCA_NICSR_ENABINTR 0x0002 /* Enable Interrupts */
1229 #define DEPCA_NICSR_MASKINTR 0x0004 /* Mask Interrupts */
1230 #define DEPCA_NICSR_AAC 0x0008 /* Address Counter Clear */
1231 #define DEPCA_NICSR_REMOTEBOOT 0x0010 /* Remote Boot Enabled (ignored) */
1232 #define DEPCA_NICSR_32KRAM 0x0020 /* DEPCA LANCE RAM size 64K (C) / 32K (S) */
1233 #define DEPCA_NICSR_LOW32K 0x0040 /* Bank Select (A15 = !This Bit) */
1234 #define DEPCA_NICSR_SHE 0x0080 /* Shared RAM Enabled (ie hide ROM) */
1235 #define DEPCA_NICSR_BOOTTMO 0x0100 /* Remote Boot Timeout (ignored) */
1236
1237 #define DEPCA_RDNICSR(sc) (LE_INW(sc, DEPCA_REG_NICSR))
1238 #define DEPCA_WRNICSR(sc, val) (LE_OUTW(sc, DEPCA_REG_NICSR, val))
1239
1240 #define DEPCA_IDSTR_OFFSET 0xC006 /* ID String Offset */
1241
1242 #define DEPCA_REG_EISAID 0x80
1243 #define DEPCA_EISAID_MASK 0xf0ffffff
1244 #define DEPCA_EISAID_DE422 0x2042A310
1245
1246 typedef enum {
1247 DEPCA_CLASSIC,
1248 DEPCA_DE100, DEPCA_DE101,
1249 DEPCA_EE100,
1250 DEPCA_DE200, DEPCA_DE201, DEPCA_DE202,
1251 DEPCA_DE422,
1252 DEPCA_UNKNOWN
1253 } depca_t;
1254
1255 static const char *depca_signatures[] = {
1256 "DEPCA",
1257 "DE100", "DE101",
1258 "EE100",
1259 "DE200", "DE201", "DE202",
1260 "DE422",
1261 NULL
1262 };
1263
1264 static int
1265 depca_probe(
1266 le_softc_t *sc,
1267 const le_board_t *bd,
1268 int *msize)
1269 {
1270 unsigned nicsr, idx, idstr_offset = DEPCA_IDSTR_OFFSET;
1271
1272 /*
1273 * Find out how memory we are dealing with. Adjust
1274 * the ID string offset approriately if we are at
1275 * 32K. Make sure the ROM is enabled.
1276 */
1277 nicsr = DEPCA_RDNICSR(sc);
1278 nicsr &= ~(DEPCA_NICSR_SHE|DEPCA_NICSR_LED|DEPCA_NICSR_ENABINTR);
1279
1280 if (nicsr & DEPCA_NICSR_32KRAM) {
1281 /*
1282 * Make we are going to read the upper
1283 * 32K so we do read the ROM.
1284 */
1285 sc->lance_ramsize = 32 * 1024;
1286 nicsr &= ~DEPCA_NICSR_LOW32K;
1287 sc->lance_ramoffset = 32 * 1024;
1288 idstr_offset -= sc->lance_ramsize;
1289 } else {
1290 sc->lance_ramsize = 64 * 1024;
1291 sc->lance_ramoffset = 0;
1292 }
1293 DEPCA_WRNICSR(sc, nicsr);
1294
1295 sc->le_prodname = NULL;
1296 for (idx = 0; depca_signatures[idx] != NULL; idx++) {
1297 if (bcmp(depca_signatures[idx], sc->le_membase + idstr_offset, 5) == 0) {
1298 sc->le_prodname = depca_signatures[idx];
1299 break;
1300 }
1301 }
1302
1303 if (sc->le_prodname == NULL) {
1304 /*
1305 * Try to get the EISA device if it's a DE422.
1306 */
1307 if (sc->le_iobase > 0x1000 && (sc->le_iobase & 0x0F00) == 0x0C00
1308 && (LE_INL(sc, DEPCA_REG_EISAID) & DEPCA_EISAID_MASK)
1309 == DEPCA_EISAID_DE422) {
1310 sc->le_prodname = "DE422";
1311 } else {
1312 return 0;
1313 }
1314 }
1315 if (idx == DEPCA_CLASSIC)
1316 sc->lance_ramsize -= 16384; /* Can't use the ROM area on a DEPCA */
1317
1318 /*
1319 * Try to read the address ROM.
1320 * Stop the LANCE, reset the Address ROM Counter (AAC),
1321 * read the NICSR to "clock" in the reset, and then
1322 * re-enable the Address ROM Counter. Now read the
1323 * address ROM.
1324 */
1325 sc->lance_rdp = DEPCA_REG_RDP;
1326 sc->lance_rap = DEPCA_REG_RAP;
1327 sc->lance_csr3 = LN_CSR3_ALE;
1328 sc->le_mctbl = sc->lance_initb.ln_multi_mask;
1329 sc->le_mcmask = LN_MC_MASK;
1330 LN_SELCSR(sc, LN_CSR0);
1331 LN_WRCSR(sc, LN_CSR0_STOP);
1332
1333 if (idx < DEPCA_DE200) {
1334 DEPCA_WRNICSR(sc, DEPCA_RDNICSR(sc) & ~DEPCA_NICSR_AAC);
1335 DEPCA_WRNICSR(sc, DEPCA_RDNICSR(sc) | DEPCA_NICSR_AAC);
1336 }
1337
1338 if (le_read_macaddr(sc, DEPCA_REG_ADDRROM, idx == DEPCA_CLASSIC) < 0)
1339 return 0;
1340
1341 MEMCPY(sc->le_ac.ac_enaddr, sc->le_hwaddr, 6);
1342 /*
1343 * Renable shared RAM.
1344 */
1345 DEPCA_WRNICSR(sc, DEPCA_RDNICSR(sc) | DEPCA_NICSR_SHE);
1346
1347 le_intrvec[sc->le_if.if_unit] = depca_intr;
1348 if (!lance_init_adapmem(sc))
1349 return 0;
1350
1351 sc->if_reset = lance_reset;
1352 sc->if_init = lance_init;
1353 sc->le_if.if_start = lance_start;
1354 DEPCA_WRNICSR(sc, DEPCA_NICSR_SHE | DEPCA_NICSR_ENABINTR);
1355 sc->if_reset(sc);
1356
1357 LN_STAT(low_txfree = sc->lance_txinfo.ri_max);
1358 LN_STAT(low_txheapsize = 0xFFFFFFFF);
1359 *msize = sc->lance_ramsize;
1360 return DEPCA_IOSPACE;
1361 }
1362
1363 static void
1364 depca_intr(
1365 le_softc_t *sc)
1366 {
1367 DEPCA_WRNICSR(sc, DEPCA_RDNICSR(sc) ^ DEPCA_NICSR_LED);
1368 lance_intr(sc);
1369 }
1370
1371 /*
1372 * Here's as good a place to describe our paritioning of the
1373 * LANCE shared RAM space. (NOTE: this driver does not yet support
1374 * the concept of a LANCE being able to DMA).
1375 *
1376 * First is the 24 (00:23) bytes for LANCE Initialization Block
1377 * Next are the recieve descriptors. The number is calculated from
1378 * how many LN_BUFSIZE buffers we can allocate (this number must
1379 * be a power of 2). Next are the transmit descriptors. The amount
1380 * of transmit descriptors is derived from the size of the RAM
1381 * divided by 1K. Now come the receive buffers (one for each receive
1382 * descriptor). Finally is the transmit heap. (no fixed buffers are
1383 * allocated so as to make the most use of the limited space).
1384 */
1385 static int
1386 lance_init_adapmem(
1387 le_softc_t *sc)
1388 {
1389 lance_addr_t rxbufoffset;
1390 lance_addr_t rxdescoffset, txdescoffset;
1391 unsigned rxdescs, txdescs;
1392
1393 /*
1394 * First calculate how many descriptors we heap.
1395 * Note this assumes the ramsize is a power of two.
1396 */
1397 sc->lance_rxbufsize = LN_BUFSIZE;
1398 rxdescs = 1;
1399 while (rxdescs * sc->lance_rxbufsize < sc->lance_ramsize)
1400 rxdescs *= 2;
1401 rxdescs /= 2;
1402 if (rxdescs > LN_DESC_MAX) {
1403 sc->lance_rxbufsize *= rxdescs / LN_DESC_MAX;
1404 rxdescs = LN_DESC_MAX;
1405 }
1406 txdescs = sc->lance_ramsize / LN_TXDESC_RATIO;
1407 if (txdescs > LN_DESC_MAX)
1408 txdescs = LN_DESC_MAX;
1409
1410 /*
1411 * Now calculate where everything goes in memory
1412 */
1413 rxdescoffset = sizeof(ln_initb_t);
1414 txdescoffset = rxdescoffset + sizeof(ln_desc_t) * rxdescs;
1415 rxbufoffset = txdescoffset + sizeof(ln_desc_t) * txdescs;
1416
1417 sc->le_mctbl = (le_mcbits_t *) sc->lance_initb.ln_multi_mask;
1418 /*
1419 * Remember these for debugging.
1420 */
1421 sc->lance_raminitb = (ln_initb_t *) sc->le_membase;
1422 sc->lance_ramdesc = (ln_desc_t *) (sc->le_membase + rxdescoffset);
1423
1424 /*
1425 * Initialize the rings.
1426 */
1427 if (!lance_init_ring(sc, &sc->lance_initb.ln_rxring, &sc->lance_rxinfo,
1428 rxdescs, rxbufoffset, rxdescoffset))
1429 return 0;
1430 sc->lance_rxinfo.ri_heap = rxbufoffset;
1431 sc->lance_rxinfo.ri_heapend = rxbufoffset + sc->lance_rxbufsize * rxdescs;
1432
1433 if (!lance_init_ring(sc, &sc->lance_initb.ln_txring, &sc->lance_txinfo,
1434 txdescs, 0, txdescoffset))
1435 return 0;
1436 sc->lance_txinfo.ri_heap = sc->lance_rxinfo.ri_heapend;
1437 sc->lance_txinfo.ri_heapend = sc->lance_ramsize;
1438
1439 /*
1440 * Set CSR1 and CSR2 to the address of the init block (which
1441 * for us is always 0.
1442 */
1443 sc->lance_csr1 = LN_ADDR_LO(0 + sc->lance_ramoffset);
1444 sc->lance_csr2 = LN_ADDR_HI(0 + sc->lance_ramoffset);
1445 return 1;
1446 }
1447
1448 static int
1449 lance_init_ring(
1450 le_softc_t *sc,
1451 ln_ring_t *rp,
1452 lance_ring_t *ri,
1453 unsigned ndescs,
1454 lance_addr_t bufoffset,
1455 lance_addr_t descoffset)
1456 {
1457 lance_descinfo_t *di;
1458
1459 /*
1460 * Initialize the ring pointer in the LANCE InitBlock
1461 */
1462 rp->r_addr_lo = LN_ADDR_LO(descoffset + sc->lance_ramoffset);
1463 rp->r_addr_hi = LN_ADDR_HI(descoffset + sc->lance_ramoffset);
1464 rp->r_log2_size = ffs(ndescs) - 1;
1465
1466 /*
1467 * Allocate the ring entry descriptors and initialize
1468 * our ring information data structure. All these are
1469 * our copies and do not live in the LANCE RAM.
1470 */
1471 ri->ri_first = (lance_descinfo_t *) malloc(ndescs * sizeof(*di), M_DEVBUF, M_NOWAIT);
1472 if (ri->ri_first == NULL) {
1473 printf("lance_init_ring: malloc(%d) failed\n", ndescs * sizeof(*di));
1474 return 0;
1475 }
1476 ri->ri_free = ri->ri_max = ndescs;
1477 ri->ri_last = ri->ri_first + ri->ri_max;
1478 for (di = ri->ri_first; di < ri->ri_last; di++) {
1479 di->di_addr = sc->le_membase + descoffset;
1480 di->di_mbuf = NULL;
1481 if (bufoffset) {
1482 di->di_bufaddr = bufoffset;
1483 di->di_buflen = sc->lance_rxbufsize;
1484 bufoffset += sc->lance_rxbufsize;
1485 }
1486 descoffset += sizeof(ln_desc_t);
1487 }
1488 return 1;
1489 }
1490
1491 static void
1492 lance_dumpcsrs(
1493 le_softc_t *sc,
1494 const char *id)
1495 {
1496 if_printf(&sc->le_if, "%s: nicsr=%04x", id, DEPCA_RDNICSR(sc));
1497 LN_SELCSR(sc, LN_CSR0); printf(" csr0=%04x", LN_RDCSR(sc));
1498 LN_SELCSR(sc, LN_CSR1); printf(" csr1=%04x", LN_RDCSR(sc));
1499 LN_SELCSR(sc, LN_CSR2); printf(" csr2=%04x", LN_RDCSR(sc));
1500 LN_SELCSR(sc, LN_CSR3); printf(" csr3=%04x\n", LN_RDCSR(sc));
1501 LN_SELCSR(sc, LN_CSR0);
1502 }
1503
1504 static void
1505 lance_reset(
1506 le_softc_t *sc)
1507 {
1508 register int cnt, csr;
1509
1510 /* lance_dumpcsrs(sc, "lance_reset: start"); */
1511
1512 LN_WRCSR(sc, LN_RDCSR(sc) & ~LN_CSR0_ENABINTR);
1513 LN_WRCSR(sc, LN_CSR0_STOP);
1514 DELAY(100);
1515
1516 sc->le_flags &= ~IFF_UP;
1517 sc->le_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
1518
1519 le_multi_filter(sc); /* initialize the multicast table */
1520 if ((sc->le_flags | sc->le_if.if_flags) & IFF_ALLMULTI) {
1521 sc->lance_initb.ln_multi_mask[0] = 0xFFFFU;
1522 sc->lance_initb.ln_multi_mask[1] = 0xFFFFU;
1523 sc->lance_initb.ln_multi_mask[2] = 0xFFFFU;
1524 sc->lance_initb.ln_multi_mask[3] = 0xFFFFU;
1525 }
1526 sc->lance_initb.ln_physaddr[0] = ((u_short *) sc->le_ac.ac_enaddr)[0];
1527 sc->lance_initb.ln_physaddr[1] = ((u_short *) sc->le_ac.ac_enaddr)[1];
1528 sc->lance_initb.ln_physaddr[2] = ((u_short *) sc->le_ac.ac_enaddr)[2];
1529 if (sc->le_if.if_flags & IFF_PROMISC) {
1530 sc->lance_initb.ln_mode |= LN_MODE_PROMISC;
1531 } else {
1532 sc->lance_initb.ln_mode &= ~LN_MODE_PROMISC;
1533 }
1534 /*
1535 * We force the init block to be at the start
1536 * of the LANCE's RAM buffer.
1537 */
1538 LN_COPYTO(sc, &sc->lance_initb, sc->le_membase, sizeof(sc->lance_initb));
1539 LN_SELCSR(sc, LN_CSR1); LN_WRCSR(sc, sc->lance_csr1);
1540 LN_SELCSR(sc, LN_CSR2); LN_WRCSR(sc, sc->lance_csr2);
1541 LN_SELCSR(sc, LN_CSR3); LN_WRCSR(sc, sc->lance_csr3);
1542
1543 /* lance_dumpcsrs(sc, "lance_reset: preinit"); */
1544
1545 /*
1546 * clear INITDONE and INIT the chip
1547 */
1548 LN_SELCSR(sc, LN_CSR0);
1549 LN_WRCSR(sc, LN_CSR0_INIT|LN_CSR0_INITDONE);
1550
1551 csr = 0;
1552 cnt = 100;
1553 while (cnt-- > 0) {
1554 if (((csr = LN_RDCSR(sc)) & LN_CSR0_INITDONE) != 0)
1555 break;
1556 DELAY(10000);
1557 }
1558
1559 if ((csr & LN_CSR0_INITDONE) == 0) { /* make sure we got out okay */
1560 lance_dumpcsrs(sc, "lance_reset: reset failure");
1561 } else {
1562 /* lance_dumpcsrs(sc, "lance_reset: end"); */
1563 sc->le_if.if_flags |= IFF_UP;
1564 sc->le_flags |= IFF_UP;
1565 }
1566 }
1567
1568 static void
1569 lance_init(
1570 le_softc_t *sc)
1571 {
1572 lance_ring_t *ri;
1573 lance_descinfo_t *di;
1574 ln_desc_t desc;
1575
1576 LN_STAT(inits++);
1577 if (sc->le_if.if_flags & IFF_RUNNING) {
1578 sc->if_reset(sc);
1579 lance_tx_intr(sc);
1580 /*
1581 * If we were running, requeue any pending transmits.
1582 */
1583 ri = &sc->lance_txinfo;
1584 di = ri->ri_nextout;
1585 while (ri->ri_free < ri->ri_max) {
1586 if (--di == ri->ri_first)
1587 di = ri->ri_nextout - 1;
1588 if (di->di_mbuf == NULL)
1589 break;
1590 IF_PREPEND(&sc->le_if.if_snd, di->di_mbuf);
1591 di->di_mbuf = NULL;
1592 ri->ri_free++;
1593 }
1594 } else {
1595 sc->if_reset(sc);
1596 }
1597
1598 /*
1599 * Reset the transmit ring. Make sure we own all the buffers.
1600 * Also reset the transmit heap.
1601 */
1602 sc->le_if.if_flags &= ~IFF_OACTIVE;
1603 ri = &sc->lance_txinfo;
1604 for (di = ri->ri_first; di < ri->ri_last; di++) {
1605 if (di->di_mbuf != NULL) {
1606 m_freem(di->di_mbuf);
1607 di->di_mbuf = NULL;
1608 }
1609 desc.d_flag = 0;
1610 desc.d_addr_lo = LN_ADDR_LO(ri->ri_heap + sc->lance_ramoffset);
1611 desc.d_addr_hi = LN_ADDR_HI(ri->ri_heap + sc->lance_ramoffset);
1612 desc.d_buflen = 0;
1613 LN_PUTDESC(sc, &desc, di->di_addr);
1614 }
1615 ri->ri_nextin = ri->ri_nextout = ri->ri_first;
1616 ri->ri_free = ri->ri_max;
1617 ri->ri_outptr = ri->ri_heap;
1618 ri->ri_outsize = ri->ri_heapend - ri->ri_heap;
1619
1620 ri = &sc->lance_rxinfo;
1621 desc.d_flag = LN_DFLAG_OWNER;
1622 desc.d_buflen = 0 - sc->lance_rxbufsize;
1623 for (di = ri->ri_first; di < ri->ri_last; di++) {
1624 desc.d_addr_lo = LN_ADDR_LO(di->di_bufaddr + sc->lance_ramoffset);
1625 desc.d_addr_hi = LN_ADDR_HI(di->di_bufaddr + sc->lance_ramoffset);
1626 LN_PUTDESC(sc, &desc, di->di_addr);
1627 }
1628 ri->ri_nextin = ri->ri_nextout = ri->ri_first;
1629 ri->ri_outptr = ri->ri_heap;
1630 ri->ri_outsize = ri->ri_heapend - ri->ri_heap;
1631 ri->ri_free = 0;
1632
1633 if (sc->le_if.if_flags & IFF_UP) {
1634 sc->le_if.if_flags |= IFF_RUNNING;
1635 LN_WRCSR(sc, LN_CSR0_START|LN_CSR0_INITDONE|LN_CSR0_ENABINTR);
1636 /* lance_dumpcsrs(sc, "lance_init: up"); */
1637 lance_start(&sc->le_if);
1638 } else {
1639 /* lance_dumpcsrs(sc, "lance_init: down"); */
1640 sc->le_if.if_flags &= ~IFF_RUNNING;
1641 }
1642 }
1643
1644 static void
1645 lance_intr(
1646 le_softc_t *sc)
1647 {
1648 unsigned oldcsr;
1649
1650 oldcsr = LN_RDCSR(sc);
1651 oldcsr &= ~LN_CSR0_ENABINTR;
1652 LN_WRCSR(sc, oldcsr);
1653 LN_WRCSR(sc, LN_CSR0_ENABINTR);
1654
1655 if (oldcsr & LN_CSR0_ERRSUM) {
1656 if (oldcsr & LN_CSR0_MISS) {
1657 /*
1658 * LN_CSR0_MISS is signaled when the LANCE receiver
1659 * loses a packet because it doesn't own a receive
1660 * descriptor. Rev. D LANCE chips, which are no
1661 * longer used, require a chip reset as described
1662 * below.
1663 */
1664 LN_STAT(rx_misses++);
1665 }
1666 if (oldcsr & LN_CSR0_MEMERROR) {
1667 LN_STAT(memory_errors++);
1668 if (oldcsr & (LN_CSR0_RXON|LN_CSR0_TXON)) {
1669 lance_init(sc);
1670 return;
1671 }
1672 }
1673 }
1674
1675 if ((oldcsr & LN_CSR0_RXINT) && lance_rx_intr(sc)) {
1676 lance_init(sc);
1677 return;
1678 }
1679
1680 if (oldcsr & LN_CSR0_TXINT) {
1681 if (lance_tx_intr(sc))
1682 lance_start(&sc->le_if);
1683 }
1684
1685 if (oldcsr == (LN_CSR0_PENDINTR|LN_CSR0_RXON|LN_CSR0_TXON))
1686 if_printf(&sc->le_if, "lance_intr: stray interrupt\n");
1687 }
1688
1689 static int
1690 lance_rx_intr(
1691 le_softc_t *sc)
1692 {
1693 lance_ring_t *ri = &sc->lance_rxinfo;
1694 lance_descinfo_t *eop;
1695 ln_desc_t desc;
1696 int ndescs, total_len, rxdescs;
1697
1698 LN_STAT(rx_intrs++);
1699
1700 for (rxdescs = 0;;) {
1701 /*
1702 * Now to try to find the end of this packet chain.
1703 */
1704 for (ndescs = 1, eop = ri->ri_nextin;; ndescs++) {
1705 /*
1706 * If we don't own this descriptor, the packet ain't
1707 * all here so return because we are done.
1708 */
1709 LN_GETDESC(sc, &desc, eop->di_addr);
1710 if (desc.d_flag & LN_DFLAG_OWNER)
1711 return 0;
1712 /*
1713 * In case we have missed a packet and gotten the
1714 * LANCE confused, make sure we are pointing at the
1715 * start of a packet. If we aren't, something is really
1716 * strange so reinit the LANCE.
1717 */
1718 if (desc.d_flag & LN_DFLAG_RxBUFERROR) {
1719 LN_STAT(rx_buferror++);
1720 return 1;
1721 }
1722 if ((desc.d_flag & LN_DFLAG_SOP) && eop != ri->ri_nextin) {
1723 LN_STAT(rx_badsop++);
1724 return 1;
1725 }
1726 if (desc.d_flag & LN_DFLAG_EOP)
1727 break;
1728 if (++eop == ri->ri_last)
1729 eop = ri->ri_first;
1730 }
1731
1732 total_len = (desc.d_status & LN_DSTS_RxLENMASK) - 4;
1733 if ((desc.d_flag & LN_DFLAG_RxERRSUM) == 0) {
1734 /*
1735 * Valid Packet -- If the SOP is less than or equal to the EOP
1736 * or the length is less than the receive buffer size, then the
1737 * packet is contiguous in memory and can be copied in one shot.
1738 * Otherwise we need to copy two segments to get the entire
1739 * packet.
1740 */
1741 if (ri->ri_nextin <= eop || total_len <= ri->ri_heapend - ri->ri_nextin->di_bufaddr) {
1742 le_input(sc, sc->le_membase + ri->ri_nextin->di_bufaddr,
1743 total_len, total_len, NULL);
1744 LN_STAT(rx_contig++);
1745 } else {
1746 le_input(sc, sc->le_membase + ri->ri_nextin->di_bufaddr,
1747 total_len,
1748 ri->ri_heapend - ri->ri_nextin->di_bufaddr,
1749 sc->le_membase + ri->ri_first->di_bufaddr);
1750 LN_STAT(rx_noncontig++);
1751 }
1752 } else {
1753 /*
1754 * If the packet is bad, increment the
1755 * counters.
1756 */
1757 sc->le_if.if_ierrors++;
1758 if (desc.d_flag & LN_DFLAG_RxBADCRC)
1759 LN_STAT(rx_badcrc++);
1760 if (desc.d_flag & LN_DFLAG_RxOVERFLOW)
1761 LN_STAT(rx_badalign++);
1762 if (desc.d_flag & LN_DFLAG_RxFRAMING)
1763 LN_STAT(rx_badframe++);
1764 }
1765 sc->le_if.if_ipackets++;
1766 LN_STAT(rx_ndescs[ndescs-1]++);
1767 rxdescs += ndescs;
1768 while (ndescs-- > 0) {
1769 LN_SETFLAG(sc, ri->ri_nextin->di_addr, LN_DFLAG_OWNER);
1770 if (++ri->ri_nextin == ri->ri_last)
1771 ri->ri_nextin = ri->ri_first;
1772 }
1773 }
1774 /* LN_STAT(rx_intr_descs[rxdescs]++); */
1775 LN_MAXSTAT(rx_intr_hidescs, rxdescs);
1776
1777 return 0;
1778 }
1779
1780 static void
1781 lance_start(
1782 struct ifnet *ifp)
1783 {
1784 le_softc_t *sc = (le_softc_t *) ifp;
1785 struct ifqueue *ifq = &ifp->if_snd;
1786 lance_ring_t *ri = &sc->lance_txinfo;
1787 lance_descinfo_t *di;
1788 ln_desc_t desc;
1789 unsigned len, slop;
1790 struct mbuf *m, *m0;
1791 caddr_t bp;
1792
1793 if ((ifp->if_flags & IFF_RUNNING) == 0)
1794 return;
1795
1796 for (;;) {
1797 IF_DEQUEUE(ifq, m);
1798 if (m == NULL)
1799 break;
1800
1801 /*
1802 * Make the packet meets the minimum size for Ethernet.
1803 * The slop is so that we also use an even number of longwards.
1804 */
1805 len = ETHERMIN + sizeof(struct ether_header);
1806 if (m->m_pkthdr.len > len)
1807 len = m->m_pkthdr.len;
1808
1809 slop = (8 - len) & 3;
1810 /*
1811 * If there are no free ring entries (there must be always
1812 * one owned by the host), or there's not enough space for
1813 * this packet, or this packet would wrap around the end
1814 * of LANCE RAM then wait for the transmits to empty for
1815 * space and ring entries to become available.
1816 */
1817 if (ri->ri_free == 1 || len + slop > ri->ri_outsize) {
1818 /*
1819 * Try to see if we can free up anything off the transit ring.
1820 */
1821 if (lance_tx_intr(sc) > 0) {
1822 LN_STAT(tx_drains[0]++);
1823 IF_PREPEND(ifq, m);
1824 continue;
1825 }
1826 LN_STAT(tx_nospc[0]++);
1827 break;
1828 }
1829
1830 if (len + slop > ri->ri_heapend - ri->ri_outptr) {
1831 /*
1832 * Since the packet won't fit in the end of the transmit
1833 * heap, see if there is space at the beginning of the transmit
1834 * heap. If not, try again when there is space.
1835 */
1836 LN_STAT(tx_orphaned++);
1837 slop += ri->ri_heapend - ri->ri_outptr;
1838 if (len + slop > ri->ri_outsize) {
1839 LN_STAT(tx_nospc[1]++);
1840 break;
1841 }
1842 /*
1843 * Point to the beginning of the heap
1844 */
1845 ri->ri_outptr = ri->ri_heap;
1846 LN_STAT(tx_adoptions++);
1847 }
1848
1849 /*
1850 * Initialize the descriptor (saving the buffer address,
1851 * buffer length, and mbuf) and write the packet out
1852 * to the board.
1853 */
1854 di = ri->ri_nextout;
1855 di->di_bufaddr = ri->ri_outptr;
1856 di->di_buflen = len + slop;
1857 di->di_mbuf = m;
1858 bp = sc->le_membase + di->di_bufaddr;
1859 for (m0 = m; m0 != NULL; m0 = m0->m_next) {
1860 LN_COPYTO(sc, mtod(m0, caddr_t), bp, m0->m_len);
1861 bp += m0->m_len;
1862 }
1863 /*
1864 * Zero out the remainder if needed (< ETHERMIN).
1865 */
1866 if (m->m_pkthdr.len < len)
1867 LN_ZERO(sc, bp, len - m->m_pkthdr.len);
1868
1869 /*
1870 * Finally, copy out the descriptor and tell the
1871 * LANCE to transmit!.
1872 */
1873 desc.d_buflen = 0 - len;
1874 desc.d_addr_lo = LN_ADDR_LO(di->di_bufaddr + sc->lance_ramoffset);
1875 desc.d_addr_hi = LN_ADDR_HI(di->di_bufaddr + sc->lance_ramoffset);
1876 desc.d_flag = LN_DFLAG_SOP|LN_DFLAG_EOP|LN_DFLAG_OWNER;
1877 LN_PUTDESC(sc, &desc, di->di_addr);
1878 LN_WRCSR(sc, LN_CSR0_TXDEMAND|LN_CSR0_ENABINTR);
1879
1880 /*
1881 * Do our bookkeeping with our transmit heap.
1882 * (if we wrap, point back to the beginning).
1883 */
1884 ri->ri_outptr += di->di_buflen;
1885 ri->ri_outsize -= di->di_buflen;
1886 LN_MAXSTAT(high_txoutptr, ri->ri_outptr);
1887 LN_MINSTAT(low_txheapsize, ri->ri_outsize);
1888
1889 if (ri->ri_outptr == ri->ri_heapend)
1890 ri->ri_outptr = ri->ri_heap;
1891
1892 ri->ri_free--;
1893 if (++ri->ri_nextout == ri->ri_last)
1894 ri->ri_nextout = ri->ri_first;
1895 LN_MINSTAT(low_txfree, ri->ri_free);
1896 }
1897 if (m != NULL) {
1898 ifp->if_flags |= IFF_OACTIVE;
1899 IF_PREPEND(ifq, m);
1900 }
1901 }
1902
1903 static int
1904 lance_tx_intr(
1905 le_softc_t *sc)
1906 {
1907 lance_ring_t *ri = &sc->lance_txinfo;
1908 unsigned xmits;
1909
1910 LN_STAT(tx_intrs++);
1911 for (xmits = 0; ri->ri_free < ri->ri_max; ) {
1912 ln_desc_t desc;
1913
1914 LN_GETDESC(sc, &desc, ri->ri_nextin->di_addr);
1915 if (desc.d_flag & LN_DFLAG_OWNER)
1916 break;
1917
1918 if (desc.d_flag & (LN_DFLAG_TxONECOLL|LN_DFLAG_TxMULTCOLL))
1919 sc->le_if.if_collisions++;
1920 if (desc.d_flag & LN_DFLAG_TxDEFERRED)
1921 LN_STAT(tx_deferred++);
1922 if (desc.d_flag & LN_DFLAG_TxONECOLL)
1923 LN_STAT(tx_single_collisions++);
1924 if (desc.d_flag & LN_DFLAG_TxMULTCOLL)
1925 LN_STAT(tx_multiple_collisions++);
1926
1927 if (desc.d_flag & LN_DFLAG_TxERRSUM) {
1928 if (desc.d_status & (LN_DSTS_TxUNDERFLOW|LN_DSTS_TxBUFERROR|
1929 LN_DSTS_TxEXCCOLL|LN_DSTS_TxLATECOLL)) {
1930 if (desc.d_status & LN_DSTS_TxEXCCOLL) {
1931 unsigned tdr;
1932 LN_STAT(tx_excessive_collisions++);
1933 if ((tdr = (desc.d_status & LN_DSTS_TxTDRMASK)) > 0) {
1934 tdr *= 100;
1935 if_printf(&sc->le_if, "lance: warning: excessive collisions: TDR %dns (%d-%dm)\n",
1936 tdr, (tdr*99)/1000, (tdr*117)/1000);
1937 }
1938 }
1939 if (desc.d_status & LN_DSTS_TxBUFERROR)
1940 LN_STAT(tx_buferror++);
1941 sc->le_if.if_oerrors++;
1942 if ((desc.d_status & LN_DSTS_TxLATECOLL) == 0) {
1943 lance_init(sc);
1944 return 0;
1945 } else {
1946 LN_STAT(tx_late_collisions++);
1947 }
1948 }
1949 }
1950 m_freem(ri->ri_nextin->di_mbuf);
1951 ri->ri_nextin->di_mbuf = NULL;
1952 sc->le_if.if_opackets++;
1953 ri->ri_free++;
1954 ri->ri_outsize += ri->ri_nextin->di_buflen;
1955 if (++ri->ri_nextin == ri->ri_last)
1956 ri->ri_nextin = ri->ri_first;
1957 sc->le_if.if_flags &= ~IFF_OACTIVE;
1958 xmits++;
1959 }
1960 if (ri->ri_free == ri->ri_max)
1961 LN_STAT(tx_emptied++);
1962 /* LN_STAT(tx_intr_descs[xmits]++); */
1963 LN_MAXSTAT(tx_intr_hidescs, xmits);
1964 return xmits;
1965 }
1966 #endif /* !defined(LE_NOLANCE) */
Cache object: 358fb2c3d0c2593d903e8965282c3951
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