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15637ed4 RG |
1 | /*- |
2 | * Copyright (c) 1990, 1991 William F. Jolitz. | |
3 | * Copyright (c) 1990 The Regents of the University of California. | |
4 | * All rights reserved. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following 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 | * 3. All advertising materials mentioning features or use of this software | |
15 | * must display the following acknowledgement: | |
16 | * This product includes software developed by the University of | |
17 | * California, Berkeley and its contributors. | |
18 | * 4. Neither the name of the University nor the names of its contributors | |
19 | * may be used to endorse or promote products derived from this software | |
20 | * without specific prior written permission. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
32 | * SUCH DAMAGE. | |
33 | * | |
34 | * @(#)if_ne.c 7.4 (Berkeley) 5/21/91 | |
35 | */ | |
36 | ||
37 | /* | |
b794bfc8 | 38 | * NE2000/NE1000 Ethernet driver |
15637ed4 RG |
39 | * |
40 | * Parts inspired from Tim Tucker's if_wd driver for the wd8003, | |
41 | * insight on the ne2000 gained from Robert Clements PC/FTP driver. | |
b794bfc8 JH |
42 | * |
43 | * Corrected for NE1000 by Andrew A. Chernov | |
15637ed4 RG |
44 | */ |
45 | ||
46 | #include "ne.h" | |
47 | #if NNE > 0 | |
48 | ||
49 | #include "param.h" | |
50 | #include "systm.h" | |
51 | #include "mbuf.h" | |
52 | #include "buf.h" | |
53 | #include "protosw.h" | |
54 | #include "socket.h" | |
55 | #include "ioctl.h" | |
56 | #include "errno.h" | |
57 | #include "syslog.h" | |
58 | ||
59 | #include "net/if.h" | |
60 | #include "net/netisr.h" | |
61 | #include "net/route.h" | |
62 | ||
63 | #ifdef INET | |
64 | #include "netinet/in.h" | |
65 | #include "netinet/in_systm.h" | |
66 | #include "netinet/in_var.h" | |
67 | #include "netinet/ip.h" | |
68 | #include "netinet/if_ether.h" | |
69 | #endif | |
70 | ||
71 | #ifdef NS | |
72 | #include "netns/ns.h" | |
73 | #include "netns/ns_if.h" | |
74 | #endif | |
75 | ||
76 | #include "i386/isa/isa_device.h" | |
77 | #include "i386/isa/if_nereg.h" | |
78 | #include "i386/isa/icu.h" | |
79 | ||
80 | int neprobe(), neattach(), neintr(); | |
81 | int nestart(),neinit(), ether_output(), neioctl(); | |
82 | ||
83 | struct isa_driver nedriver = { | |
84 | neprobe, neattach, "ne", | |
85 | }; | |
86 | ||
87 | struct mbuf *neget(); | |
88 | ||
89 | #define ETHER_MIN_LEN 64 | |
90 | #define ETHER_MAX_LEN 1536 | |
91 | ||
92 | /* | |
93 | * Ethernet software status per interface. | |
94 | * | |
95 | * Each interface is referenced by a network interface structure, | |
b794bfc8 | 96 | * ns_if, which the routing code uses to locate the interface. |
15637ed4 RG |
97 | * This structure contains the output queue for the interface, its address, ... |
98 | */ | |
99 | struct ne_softc { | |
b794bfc8 JH |
100 | struct arpcom ns_ac; /* Ethernet common part */ |
101 | #define ns_if ns_ac.ac_if /* network-visible interface */ | |
102 | #define ns_addr ns_ac.ac_enaddr /* hardware Ethernet address */ | |
15637ed4 RG |
103 | int ns_flags; |
104 | #define DSF_LOCK 1 /* block re-entering enstart */ | |
105 | int ns_oactive ; | |
106 | int ns_mask ; | |
107 | int ns_ba; /* byte addr in buffer ram of inc pkt */ | |
108 | int ns_cur; /* current page being filled */ | |
109 | struct prhdr ns_ph; /* hardware header of incoming packet*/ | |
110 | struct ether_header ns_eh; /* header of incoming packet */ | |
111 | u_char ns_pb[2048 /*ETHERMTU+sizeof(long)*/]; | |
112 | short ns_txstart; /* transmitter buffer start */ | |
b794bfc8 | 113 | u_short ns_rxend; /* recevier buffer end */ |
15637ed4 RG |
114 | short ns_port; /* i/o port base */ |
115 | short ns_mode; /* word/byte mode */ | |
116 | } ne_softc[NNE] ; | |
117 | #define ENBUFSIZE (sizeof(struct ether_header) + ETHERMTU + 2 + ETHER_MIN_LEN) | |
118 | ||
119 | #define PAT(n) (0xa55a + 37*(n)) | |
120 | ||
121 | u_short boarddata[16]; | |
122 | ||
123 | neprobe(dvp) | |
124 | struct isa_device *dvp; | |
125 | { | |
126 | int val, i, s, sum, bytemode = 1, pat; | |
127 | register struct ne_softc *ns = &ne_softc[0]; | |
128 | register nec; | |
129 | ||
130 | #ifdef lint | |
131 | neintr(0); | |
132 | #endif | |
133 | ||
134 | nec = ns->ns_port = dvp->id_iobase; | |
135 | s = splimp(); | |
136 | ||
137 | if (bytemode) { | |
138 | /* Byte Transfers, Burst Mode Select, Fifo at 8 bytes */ | |
139 | ns->ns_mode = DSDC_BMS|DSDC_FT1; | |
140 | ns->ns_txstart = TBUF8; | |
141 | ns->ns_rxend = RBUFEND8; | |
142 | } else { | |
143 | word: | |
144 | /* Word Transfers, Burst Mode Select, Fifo at 8 bytes */ | |
145 | ns->ns_mode = DSDC_WTS|DSDC_BMS|DSDC_FT1; | |
146 | ns->ns_txstart = TBUF16; | |
147 | ns->ns_rxend = RBUFEND16; | |
148 | bytemode = 0; | |
149 | } | |
150 | ||
151 | /* Reset the bastard */ | |
152 | val = inb(nec + ne_reset); | |
153 | DELAY(200); | |
154 | outb(nec + ne_reset, val); | |
155 | DELAY(200); | |
156 | ||
157 | outb(nec + ds_cmd, DSCM_STOP|DSCM_NODMA); | |
158 | ||
159 | i = 10000; | |
160 | while ((inb(nec + ds0_isr) & DSIS_RESET) == 0 && i-- > 0); | |
161 | if (i < 0) return (0); | |
162 | ||
163 | outb(nec + ds0_isr, 0xff); | |
164 | outb(nec + ds0_dcr, ns->ns_mode); | |
165 | outb(nec + ds_cmd, DSCM_NODMA|DSCM_PG0|DSCM_STOP); | |
166 | DELAY(1000); | |
167 | ||
168 | /* Check cmd reg and fail if not right */ | |
169 | if ((i = inb(nec + ds_cmd)) != (DSCM_NODMA|DSCM_PG0|DSCM_STOP)) | |
170 | return(0); | |
171 | ||
172 | outb(nec + ds0_tcr, 0); | |
173 | outb(nec + ds0_rcr, DSRC_MON); | |
174 | outb(nec + ds0_pstart, (ns->ns_txstart+PKTSZ)/DS_PGSIZE); | |
175 | outb(nec + ds0_pstop, ns->ns_rxend/DS_PGSIZE); | |
176 | outb(nec + ds0_bnry, ns->ns_rxend/DS_PGSIZE); | |
177 | outb(nec + ds0_imr, 0); | |
178 | outb(nec + ds0_isr, 0); | |
179 | outb(nec + ds_cmd, DSCM_NODMA|DSCM_PG1|DSCM_STOP); | |
180 | outb(nec + ds1_curr, (ns->ns_txstart+PKTSZ)/DS_PGSIZE); | |
181 | outb(nec + ds_cmd, DSCM_NODMA|DSCM_PG0|DSCM_STOP); | |
182 | ||
183 | ||
184 | #ifdef NEDEBUG | |
185 | #define RCON 37 | |
186 | { int i, rom; | |
187 | ||
188 | rom=1; | |
189 | printf("ne ram "); | |
190 | ||
191 | for (i = 0; i < 0xfff0; i+=4) { | |
192 | pat = PAT(i); | |
193 | neput(ns, &pat,i,4); | |
194 | nefetch(ns, &pat,i,4); | |
195 | if (pat == PAT(i)) { | |
196 | if (rom) { | |
197 | rom=0; | |
198 | printf(" %x", i); | |
199 | } | |
200 | } else { | |
201 | if (!rom) { | |
202 | rom=1; | |
203 | printf("..%x ", i); | |
204 | } | |
205 | } | |
206 | pat=0; | |
207 | neput(ns, &pat,i,4); | |
208 | } | |
209 | printf("\n"); | |
210 | } | |
211 | #endif | |
212 | ||
213 | /* | |
214 | * <groan> detect difference between units | |
215 | * solely by where the RAM is decoded. | |
216 | */ | |
217 | pat = PAT(0); | |
218 | neput(ns, &pat, ns->ns_txstart, 4); | |
219 | nefetch(ns, &pat, ns->ns_txstart, 4); | |
220 | if (pat != PAT(0)) { | |
221 | if (bytemode) | |
222 | goto word; | |
223 | else return (0); | |
224 | } | |
225 | ||
226 | ||
227 | /* Extract board address */ | |
228 | nefetch (ns, (caddr_t)boarddata, 0, sizeof(boarddata)); | |
229 | ||
230 | for(i=0; i < 6; i++) | |
b794bfc8 | 231 | ns->ns_addr[i] = boarddata[i]; |
15637ed4 RG |
232 | splx(s); |
233 | return (1); | |
234 | } | |
235 | ||
236 | /* | |
237 | * Fetch from onboard ROM/RAM | |
238 | */ | |
239 | nefetch (ns, up, ad, len) struct ne_softc *ns; caddr_t up; { | |
240 | u_char cmd; | |
241 | register nec = ns->ns_port; | |
242 | int counter = 100000; | |
243 | ||
244 | cmd = inb (nec + ds_cmd); | |
245 | outb (nec + ds_cmd, DSCM_NODMA|DSCM_PG0|DSCM_START); | |
246 | ||
247 | /* Setup remote dma */ | |
248 | outb (nec + ds0_isr, DSIS_RDC); | |
249 | ||
250 | if ((ns->ns_mode & DSDC_WTS) && len&1) | |
251 | len++; /* roundup to words */ | |
252 | ||
253 | outb (nec+ds0_rbcr0, len); | |
254 | outb (nec+ds0_rbcr1, len>>8); | |
255 | outb (nec+ds0_rsar0, ad); | |
256 | outb (nec+ds0_rsar1, ad>>8); | |
257 | ||
258 | /* Execute & extract from card */ | |
259 | outb (nec+ds_cmd, DSCM_RREAD|DSCM_PG0|DSCM_START); | |
260 | ||
261 | if (ns->ns_mode & DSDC_WTS) | |
262 | insw (nec+ne_data, up, len/2); | |
263 | else | |
264 | insb (nec+ne_data, up, len); | |
265 | ||
266 | /* Wait till done, then shutdown feature */ | |
267 | while ((inb (nec+ds0_isr) & DSIS_RDC) == 0 && counter-- > 0) | |
268 | ; | |
269 | outb (nec+ds0_isr, DSIS_RDC); | |
270 | outb (nec+ds_cmd, cmd); | |
271 | } | |
272 | ||
273 | /* | |
274 | * Put to onboard RAM | |
275 | */ | |
276 | neput (ns, up, ad, len) struct ne_softc *ns; caddr_t up; { | |
277 | u_char cmd; | |
278 | register nec = ns->ns_port; | |
279 | int counter = 100000; | |
280 | ||
281 | cmd = inb(nec+ds_cmd); | |
282 | outb (nec+ds_cmd, DSCM_NODMA|DSCM_PG0|DSCM_START); | |
283 | ||
284 | /* Setup for remote dma */ | |
285 | outb (nec+ds0_isr, DSIS_RDC); | |
286 | ||
287 | if ((ns->ns_mode & DSDC_WTS) && len&1) | |
288 | len++; /* roundup to words */ | |
289 | ||
290 | outb (nec+ds0_rbcr0, len); | |
291 | outb (nec+ds0_rbcr1, len>>8); | |
292 | outb (nec+ds0_rsar0, ad); | |
293 | outb (nec+ds0_rsar1, ad>>8); | |
294 | ||
295 | /* Execute & stuff to card */ | |
296 | outb (nec+ds_cmd, DSCM_RWRITE|DSCM_PG0|DSCM_START); | |
297 | if (ns->ns_mode & DSDC_WTS) | |
298 | outsw (nec+ne_data, up, len/2); | |
299 | else | |
300 | outsb (nec+ne_data, up, len); | |
301 | ||
302 | /* Wait till done, then shutdown feature */ | |
303 | while ((inb (nec+ds0_isr) & DSIS_RDC) == 0 && counter-- > 0) | |
304 | ; | |
305 | outb (nec+ds0_isr, DSIS_RDC); | |
306 | outb (nec+ds_cmd, cmd); | |
307 | } | |
308 | ||
309 | /* | |
310 | * Reset of interface. | |
311 | */ | |
312 | nereset(unit, uban) | |
313 | int unit, uban; | |
314 | { | |
315 | if (unit >= NNE) | |
316 | return; | |
317 | printf("ne%d: reset\n", unit); | |
318 | ne_softc[unit].ns_flags &= ~DSF_LOCK; | |
319 | neinit(unit); | |
320 | } | |
321 | ||
322 | /* | |
323 | * Interface exists: make available by filling in network interface | |
324 | * record. System will initialize the interface when it is ready | |
325 | * to accept packets. We get the ethernet address here. | |
326 | */ | |
327 | neattach(dvp) | |
328 | struct isa_device *dvp; | |
329 | { | |
330 | int unit = dvp->id_unit; | |
331 | register struct ne_softc *ns = &ne_softc[unit]; | |
b794bfc8 | 332 | register struct ifnet *ifp = &ns->ns_if; |
15637ed4 RG |
333 | |
334 | ifp->if_unit = unit; | |
335 | ifp->if_name = nedriver.name ; | |
336 | ifp->if_mtu = ETHERMTU; | |
b794bfc8 JH |
337 | printf ("ne%d: NE%s address %s", unit, |
338 | (ns->ns_mode & DSDC_WTS) ? "2000" : "1000", | |
339 | ether_sprintf(ns->ns_addr)) ; | |
15637ed4 RG |
340 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS; |
341 | ifp->if_init = neinit; | |
342 | ifp->if_output = ether_output; | |
343 | ifp->if_start = nestart; | |
344 | ifp->if_ioctl = neioctl; | |
345 | ifp->if_reset = nereset; | |
346 | ifp->if_watchdog = 0; | |
347 | if_attach(ifp); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Initialization of interface; set up initialization block | |
352 | * and transmit/receive descriptor rings. | |
353 | */ | |
354 | neinit(unit) | |
355 | int unit; | |
356 | { | |
357 | register struct ne_softc *ns = &ne_softc[unit]; | |
b794bfc8 | 358 | struct ifnet *ifp = &ns->ns_if; |
15637ed4 RG |
359 | int s; |
360 | int i; char *cp; | |
361 | register nec = ns->ns_port; | |
362 | ||
363 | if (ifp->if_addrlist == (struct ifaddr *)0) return; | |
364 | if (ifp->if_flags & IFF_RUNNING) return; | |
365 | ||
366 | s = splimp(); | |
367 | ||
368 | /* set physical address on ethernet */ | |
369 | outb (nec+ds_cmd, DSCM_NODMA|DSCM_PG1|DSCM_STOP); | |
b794bfc8 | 370 | for (i=0 ; i < 6 ; i++) outb(nec+ds1_par0+i,ns->ns_addr[i]); |
15637ed4 RG |
371 | |
372 | /* clr logical address hash filter for now */ | |
373 | for (i=0 ; i < 8 ; i++) outb(nec+ds1_mar0+i,0xff); | |
374 | ||
375 | /* init regs */ | |
376 | outb (nec+ds_cmd, DSCM_NODMA|DSCM_PG0|DSCM_STOP); | |
377 | outb (nec+ds0_rbcr0, 0); | |
378 | outb (nec+ds0_rbcr1, 0); | |
379 | outb (nec+ds0_imr, 0); | |
380 | outb (nec+ds0_isr, 0xff); | |
381 | ||
382 | /* Word Transfer select, Burst Mode Select, Fifo at 8 bytes */ | |
383 | outb(nec+ds0_dcr, ns->ns_mode); | |
384 | ||
385 | outb(nec+ds0_tcr, 0); | |
386 | outb (nec+ds0_rcr, DSRC_MON); | |
387 | outb (nec+ds0_tpsr, 0); | |
388 | outb(nec+ds0_pstart, (ns->ns_txstart+PKTSZ)/DS_PGSIZE); | |
389 | outb(nec+ds0_pstop, ns->ns_rxend/DS_PGSIZE); | |
390 | outb(nec+ds0_bnry, (ns->ns_txstart+PKTSZ)/DS_PGSIZE); | |
391 | outb (nec+ds_cmd, DSCM_NODMA|DSCM_PG1|DSCM_STOP); | |
392 | outb(nec+ds1_curr, (ns->ns_txstart+PKTSZ)/DS_PGSIZE); | |
393 | ns->ns_cur = (ns->ns_txstart+PKTSZ)/DS_PGSIZE; | |
394 | outb (nec+ds_cmd, DSCM_NODMA|DSCM_PG0|DSCM_START); | |
395 | outb (nec+ds0_rcr, DSRC_AB); | |
396 | outb(nec+ds0_dcr, ns->ns_mode); | |
397 | outb (nec+ds0_imr, 0xff); | |
398 | ||
b794bfc8 | 399 | ns->ns_if.if_flags |= IFF_RUNNING; |
15637ed4 RG |
400 | ns->ns_flags &= ~DSF_LOCK; |
401 | ns->ns_oactive = 0; ns->ns_mask = ~0; | |
402 | nestart(ifp); | |
403 | splx(s); | |
404 | } | |
405 | ||
406 | /* | |
407 | * Setup output on interface. | |
408 | * Get another datagram to send off of the interface queue, | |
409 | * and map it to the interface before starting the output. | |
410 | * called only at splimp or interrupt level. | |
411 | */ | |
412 | nestart(ifp) | |
413 | struct ifnet *ifp; | |
414 | { | |
415 | register struct ne_softc *ns = &ne_softc[ifp->if_unit]; | |
416 | struct mbuf *m0, *m; | |
b794bfc8 | 417 | int len, i, total,t; |
15637ed4 | 418 | register nec = ns->ns_port; |
b794bfc8 JH |
419 | u_char cmd; |
420 | u_short word; | |
421 | int counter; | |
422 | ||
423 | if (ns->ns_flags & DSF_LOCK) | |
424 | return; | |
425 | ||
426 | if ((ns->ns_if.if_flags & IFF_RUNNING) == 0) | |
427 | return; | |
15637ed4 RG |
428 | |
429 | /* | |
430 | * The DS8390 has only one transmit buffer, if it is busy we | |
431 | * must wait until the transmit interrupt completes. | |
432 | */ | |
433 | outb(nec+ds_cmd,DSCM_NODMA|DSCM_START); | |
434 | ||
15637ed4 RG |
435 | if (inb(nec+ds_cmd) & DSCM_TRANS) |
436 | return; | |
437 | ||
b794bfc8 | 438 | IF_DEQUEUE(&ns->ns_if.if_snd, m); |
15637ed4 RG |
439 | |
440 | if (m == 0) | |
441 | return; | |
442 | ||
b794bfc8 JH |
443 | ns->ns_flags |= DSF_LOCK; /* prevent entering nestart */ |
444 | ||
15637ed4 RG |
445 | /* |
446 | * Copy the mbuf chain into the transmit buffer | |
447 | */ | |
448 | ||
b794bfc8 | 449 | len = i = 0; |
15637ed4 RG |
450 | t = 0; |
451 | for (m0 = m; m != 0; m = m->m_next) | |
452 | t += m->m_len; | |
453 | ||
b794bfc8 | 454 | /* next code derived from neput() */ |
15637ed4 | 455 | |
b794bfc8 JH |
456 | if ((ns->ns_mode & DSDC_WTS) && t&1) |
457 | t++; /* roundup to words */ | |
458 | ||
459 | cmd = inb(nec+ds_cmd); | |
460 | outb (nec+ds_cmd, DSCM_NODMA|DSCM_PG0|DSCM_START); | |
461 | ||
462 | /* Setup for remote dma */ | |
463 | outb (nec+ds0_isr, DSIS_RDC); | |
464 | ||
465 | outb (nec+ds0_rbcr0, t); | |
466 | outb (nec+ds0_rbcr1, t>>8); | |
467 | outb (nec+ds0_rsar0, ns->ns_txstart); | |
468 | outb (nec+ds0_rsar1, ns->ns_txstart>>8); | |
469 | ||
470 | /* Execute & stuff to card */ | |
471 | outb (nec+ds_cmd, DSCM_RWRITE|DSCM_PG0|DSCM_START); | |
472 | ||
15637ed4 | 473 | m = m0; |
b794bfc8 JH |
474 | total = t; |
475 | if (ns->ns_mode & DSDC_WTS) { /* Word Mode */ | |
476 | while (m != 0) { | |
477 | if (m->m_len > 1) | |
478 | outsw(nec+ne_data, m->m_data, m->m_len / 2); | |
479 | if (m->m_len & 1) { | |
480 | word = (u_char) *(mtod(m, caddr_t) + m->m_len - 1); | |
481 | if ((m = m->m_next) != 0) { | |
482 | word |= *mtod(m, caddr_t) << 8; | |
483 | m->m_len--; | |
484 | m->m_data++; | |
485 | } | |
486 | outsw(nec+ne_data, (caddr_t)&word, 1); | |
487 | } else | |
488 | m = m->m_next; | |
489 | } | |
490 | } | |
491 | else { /* Byte Mode */ | |
492 | while (m != 0) { | |
493 | if (m->m_len > 0) | |
494 | outsb(nec+ne_data, mtod(m, caddr_t), m->m_len); | |
495 | m = m->m_next; | |
15637ed4 RG |
496 | } |
497 | } | |
498 | ||
b794bfc8 JH |
499 | m_freem(m0); |
500 | ||
501 | counter = 100000; | |
502 | /* Wait till done, then shutdown feature */ | |
503 | while ((inb (nec+ds0_isr) & DSIS_RDC) == 0 && counter-- > 0) | |
504 | ; | |
505 | outb (nec+ds0_isr, DSIS_RDC); | |
506 | outb (nec+ds_cmd, cmd); | |
507 | ||
15637ed4 RG |
508 | /* |
509 | * Init transmit length registers, and set transmit start flag. | |
510 | */ | |
511 | ||
512 | len = total; | |
513 | if (len < ETHER_MIN_LEN) len = ETHER_MIN_LEN; | |
514 | outb(nec+ds0_tbcr0,len&0xff); | |
515 | outb(nec+ds0_tbcr1,(len>>8)&0xff); | |
516 | outb(nec+ds0_tpsr, ns->ns_txstart/DS_PGSIZE); | |
517 | outb(nec+ds_cmd, DSCM_TRANS|DSCM_NODMA|DSCM_START); | |
518 | } | |
519 | ||
520 | /* buffer successor/predecessor in ring? */ | |
521 | #define succ(n) (((n)+1 >= ns->ns_rxend/DS_PGSIZE) ? (ns->ns_txstart+PKTSZ)/DS_PGSIZE : (n)+1) | |
522 | #define pred(n) (((n)-1 < (ns->ns_txstart+PKTSZ)/DS_PGSIZE) ? ns->ns_rxend/DS_PGSIZE-1 : (n)-1) | |
523 | ||
524 | /* | |
525 | * Controller interrupt. | |
526 | */ | |
527 | neintr(unit) | |
528 | { | |
529 | register struct ne_softc *ns = &ne_softc[unit]; | |
530 | u_char cmd,isr; | |
531 | register nec = ns->ns_port; | |
532 | ||
533 | /* Save cmd, clear interrupt */ | |
534 | cmd = inb (nec+ds_cmd); | |
535 | loop: | |
536 | isr = inb (nec+ds0_isr); | |
537 | outb(nec+ds_cmd,DSCM_NODMA|DSCM_START); | |
538 | outb(nec+ds0_isr, isr); | |
539 | ||
540 | /* Receiver error */ | |
541 | if (isr & DSIS_RXE) { | |
542 | /* need to read these registers to clear status */ | |
543 | (void) inb(nec+ ds0_rsr); | |
544 | (void) inb(nec+ 0xD); | |
545 | (void) inb(nec + 0xE); | |
546 | (void) inb(nec + 0xF); | |
b794bfc8 | 547 | ns->ns_if.if_ierrors++; |
15637ed4 RG |
548 | } |
549 | ||
550 | /* We received something; rummage thru tiny ring buffer */ | |
551 | if (isr & (DSIS_RX|DSIS_RXE|DSIS_ROVRN)) { | |
552 | u_char pend,lastfree; | |
553 | ||
554 | outb(nec+ds_cmd, DSCM_START|DSCM_NODMA|DSCM_PG1); | |
555 | pend = inb(nec+ds1_curr); | |
556 | outb(nec+ds_cmd, DSCM_START|DSCM_NODMA|DSCM_PG0); | |
557 | lastfree = inb(nec+ds0_bnry); | |
558 | ||
559 | /* Have we wrapped? */ | |
560 | if (lastfree >= ns->ns_rxend/DS_PGSIZE) | |
561 | lastfree = (ns->ns_txstart+PKTSZ)/DS_PGSIZE; | |
562 | if (pend < lastfree && ns->ns_cur < pend) | |
563 | lastfree = ns->ns_cur; | |
564 | else if (ns->ns_cur > lastfree) | |
565 | lastfree = ns->ns_cur; | |
566 | ||
567 | /* Something in the buffer? */ | |
568 | while (pend != lastfree) { | |
569 | u_char nxt; | |
570 | ||
571 | /* Extract header from microcephalic board */ | |
572 | nefetch(ns, &ns->ns_ph,lastfree*DS_PGSIZE, | |
573 | sizeof(ns->ns_ph)); | |
574 | ns->ns_ba = lastfree*DS_PGSIZE+sizeof(ns->ns_ph); | |
575 | ||
576 | /* Incipient paranoia */ | |
577 | if (ns->ns_ph.pr_status == DSRS_RPC || | |
578 | /* for dequna's */ | |
579 | ns->ns_ph.pr_status == 0x21) | |
580 | nerecv (ns); | |
581 | #ifdef NEDEBUG | |
582 | else { | |
583 | printf("cur %x pnd %x lfr %x ", | |
584 | ns->ns_cur, pend, lastfree); | |
585 | printf("nxt %x len %x ", ns->ns_ph.pr_nxtpg, | |
586 | (ns->ns_ph.pr_sz1<<8)+ ns->ns_ph.pr_sz0); | |
587 | printf("Bogus Sts %x\n", ns->ns_ph.pr_status); | |
588 | } | |
589 | #endif | |
590 | ||
591 | nxt = ns->ns_ph.pr_nxtpg ; | |
592 | ||
593 | /* Sanity check */ | |
594 | if ( nxt >= (ns->ns_txstart+PKTSZ)/DS_PGSIZE | |
595 | && nxt <= ns->ns_rxend/DS_PGSIZE && nxt <= pend) | |
596 | ns->ns_cur = nxt; | |
597 | else ns->ns_cur = nxt = pend; | |
598 | ||
599 | /* Set the boundaries */ | |
600 | lastfree = nxt; | |
601 | outb(nec+ds0_bnry, pred(nxt)); | |
602 | outb(nec+ds_cmd, DSCM_START|DSCM_NODMA|DSCM_PG1); | |
603 | pend = inb(nec+ds1_curr); | |
604 | outb(nec+ds_cmd, DSCM_START|DSCM_NODMA|DSCM_PG0); | |
605 | } | |
606 | outb(nec+ds_cmd, DSCM_START|DSCM_NODMA); | |
607 | } | |
608 | ||
609 | /* Transmit error */ | |
610 | if (isr & DSIS_TXE) { | |
611 | ns->ns_flags &= ~DSF_LOCK; | |
612 | /* Need to read these registers to clear status */ | |
b794bfc8 JH |
613 | ns->ns_if.if_collisions += inb(nec+ds0_tbcr0); |
614 | ns->ns_if.if_oerrors++; | |
15637ed4 RG |
615 | } |
616 | ||
617 | /* Packet Transmitted */ | |
618 | if (isr & DSIS_TX) { | |
619 | ns->ns_flags &= ~DSF_LOCK; | |
b794bfc8 JH |
620 | ++ns->ns_if.if_opackets; |
621 | ns->ns_if.if_collisions += inb(nec+ds0_tbcr0); | |
15637ed4 RG |
622 | } |
623 | ||
624 | /* Receiver ovverun? */ | |
625 | if (isr & DSIS_ROVRN) { | |
626 | log(LOG_ERR, "ne%d: error: isr %x\n", ns-ne_softc, isr | |
627 | /*, DSIS_BITS*/); | |
628 | outb(nec+ds0_rbcr0, 0); | |
629 | outb(nec+ds0_rbcr1, 0); | |
630 | outb(nec+ds0_tcr, DSTC_LB0); | |
631 | outb(nec+ds0_rcr, DSRC_MON); | |
632 | outb(nec+ds_cmd, DSCM_START|DSCM_NODMA); | |
633 | outb(nec+ds0_rcr, DSRC_AB); | |
634 | outb(nec+ds0_tcr, 0); | |
635 | } | |
636 | ||
637 | /* Any more to send? */ | |
638 | outb (nec+ds_cmd, DSCM_NODMA|DSCM_PG0|DSCM_START); | |
b794bfc8 | 639 | nestart(&ns->ns_if); |
15637ed4 RG |
640 | outb (nec+ds_cmd, cmd); |
641 | outb (nec+ds0_imr, 0xff); | |
642 | ||
643 | /* Still more to do? */ | |
644 | isr = inb (nec+ds0_isr); | |
645 | if(isr) goto loop; | |
646 | } | |
647 | ||
648 | /* | |
649 | * Ethernet interface receiver interface. | |
650 | * If input error just drop packet. | |
651 | * Otherwise examine packet to determine type. If can't determine length | |
652 | * from type, then have to drop packet. Othewise decapsulate | |
653 | * packet based on type and pass to type specific higher-level | |
654 | * input routine. | |
655 | */ | |
656 | nerecv(ns) | |
657 | register struct ne_softc *ns; | |
658 | { | |
659 | int len,i; | |
660 | ||
b794bfc8 | 661 | ns->ns_if.if_ipackets++; |
15637ed4 RG |
662 | len = ns->ns_ph.pr_sz0 + (ns->ns_ph.pr_sz1<<8); |
663 | if(len < ETHER_MIN_LEN || len > ETHER_MAX_LEN) | |
664 | return; | |
665 | ||
666 | /* this need not be so torturous - one/two bcopys at most into mbufs */ | |
667 | nefetch(ns, ns->ns_pb, ns->ns_ba, min(len,DS_PGSIZE-sizeof(ns->ns_ph))); | |
668 | if (len > DS_PGSIZE-sizeof(ns->ns_ph)) { | |
669 | int l = len - (DS_PGSIZE-sizeof(ns->ns_ph)), b ; | |
670 | u_char *p = ns->ns_pb + (DS_PGSIZE-sizeof(ns->ns_ph)); | |
671 | ||
b794bfc8 JH |
672 | if (++ns->ns_cur >= ns->ns_rxend/DS_PGSIZE) |
673 | ns->ns_cur = (ns->ns_txstart+PKTSZ)/DS_PGSIZE; | |
15637ed4 RG |
674 | b = ns->ns_cur*DS_PGSIZE; |
675 | ||
676 | while (l >= DS_PGSIZE) { | |
677 | nefetch(ns, p, b, DS_PGSIZE); | |
678 | p += DS_PGSIZE; l -= DS_PGSIZE; | |
b794bfc8 JH |
679 | if (++ns->ns_cur >= ns->ns_rxend/DS_PGSIZE) |
680 | ns->ns_cur = (ns->ns_txstart+PKTSZ)/DS_PGSIZE; | |
15637ed4 RG |
681 | b = ns->ns_cur*DS_PGSIZE; |
682 | } | |
683 | if (l > 0) | |
684 | nefetch(ns, p, b, l); | |
685 | } | |
686 | /* don't forget checksum! */ | |
687 | len -= sizeof(struct ether_header) + sizeof(long); | |
688 | ||
689 | neread(ns,(caddr_t)(ns->ns_pb), len); | |
690 | } | |
691 | ||
692 | /* | |
693 | * Pass a packet to the higher levels. | |
694 | * We deal with the trailer protocol here. | |
695 | */ | |
696 | neread(ns, buf, len) | |
697 | register struct ne_softc *ns; | |
698 | char *buf; | |
699 | int len; | |
700 | { | |
701 | register struct ether_header *eh; | |
702 | struct mbuf *m; | |
703 | int off, resid; | |
704 | register struct ifqueue *inq; | |
705 | ||
706 | /* | |
707 | * Deal with trailer protocol: if type is trailer type | |
708 | * get true type from first 16-bit word past data. | |
709 | * Remember that type was trailer by setting off. | |
710 | */ | |
711 | eh = (struct ether_header *)buf; | |
712 | eh->ether_type = ntohs((u_short)eh->ether_type); | |
713 | #define nedataaddr(eh, off, type) ((type)(((caddr_t)((eh)+1)+(off)))) | |
714 | if (eh->ether_type >= ETHERTYPE_TRAIL && | |
715 | eh->ether_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { | |
716 | off = (eh->ether_type - ETHERTYPE_TRAIL) * 512; | |
717 | if (off >= ETHERMTU) return; /* sanity */ | |
718 | eh->ether_type = ntohs(*nedataaddr(eh, off, u_short *)); | |
719 | resid = ntohs(*(nedataaddr(eh, off+2, u_short *))); | |
720 | if (off + resid > len) return; /* sanity */ | |
721 | len = off + resid; | |
722 | } else off = 0; | |
723 | ||
724 | if (len == 0) return; | |
725 | ||
726 | /* | |
727 | * Pull packet off interface. Off is nonzero if packet | |
728 | * has trailing header; neget will then force this header | |
729 | * information to be at the front, but we still have to drop | |
730 | * the type and length which are at the front of any trailer data. | |
731 | */ | |
b794bfc8 | 732 | m = neget(buf, len, off, &ns->ns_if); |
15637ed4 RG |
733 | if (m == 0) return; |
734 | ||
b794bfc8 | 735 | ether_input(&ns->ns_if, eh, m); |
15637ed4 RG |
736 | } |
737 | ||
738 | /* | |
739 | * Supporting routines | |
740 | */ | |
741 | ||
742 | /* | |
743 | * Pull read data off a interface. | |
744 | * Len is length of data, with local net header stripped. | |
745 | * Off is non-zero if a trailer protocol was used, and | |
746 | * gives the offset of the trailer information. | |
747 | * We copy the trailer information and then all the normal | |
748 | * data into mbufs. When full cluster sized units are present | |
749 | * we copy into clusters. | |
750 | */ | |
751 | struct mbuf * | |
752 | neget(buf, totlen, off0, ifp) | |
753 | caddr_t buf; | |
754 | int totlen, off0; | |
755 | struct ifnet *ifp; | |
756 | { | |
757 | struct mbuf *top, **mp, *m, *p; | |
758 | int off = off0, len; | |
759 | register caddr_t cp = buf; | |
760 | char *epkt; | |
761 | ||
762 | buf += sizeof(struct ether_header); | |
763 | cp = buf; | |
764 | epkt = cp + totlen; | |
765 | ||
766 | ||
767 | if (off) { | |
768 | cp += off + 2 * sizeof(u_short); | |
769 | totlen -= 2 * sizeof(u_short); | |
770 | } | |
771 | ||
772 | MGETHDR(m, M_DONTWAIT, MT_DATA); | |
773 | if (m == 0) | |
774 | return (0); | |
775 | m->m_pkthdr.rcvif = ifp; | |
776 | m->m_pkthdr.len = totlen; | |
777 | m->m_len = MHLEN; | |
778 | ||
779 | top = 0; | |
780 | mp = ⊤ | |
781 | while (totlen > 0) { | |
782 | if (top) { | |
783 | MGET(m, M_DONTWAIT, MT_DATA); | |
784 | if (m == 0) { | |
785 | m_freem(top); | |
786 | return (0); | |
787 | } | |
788 | m->m_len = MLEN; | |
789 | } | |
790 | len = min(totlen, epkt - cp); | |
791 | if (len >= MINCLSIZE) { | |
792 | MCLGET(m, M_DONTWAIT); | |
793 | if (m->m_flags & M_EXT) | |
794 | m->m_len = len = min(len, MCLBYTES); | |
795 | else | |
796 | len = m->m_len; | |
797 | } else { | |
798 | /* | |
799 | * Place initial small packet/header at end of mbuf. | |
800 | */ | |
801 | if (len < m->m_len) { | |
802 | if (top == 0 && len + max_linkhdr <= m->m_len) | |
803 | m->m_data += max_linkhdr; | |
804 | m->m_len = len; | |
805 | } else | |
806 | len = m->m_len; | |
807 | } | |
808 | bcopy(cp, mtod(m, caddr_t), (unsigned)len); | |
809 | cp += len; | |
810 | *mp = m; | |
811 | mp = &m->m_next; | |
812 | totlen -= len; | |
813 | if (cp == epkt) | |
814 | cp = buf; | |
815 | } | |
816 | return (top); | |
817 | } | |
818 | ||
819 | /* | |
820 | * Process an ioctl request. | |
821 | */ | |
822 | neioctl(ifp, cmd, data) | |
823 | register struct ifnet *ifp; | |
824 | int cmd; | |
825 | caddr_t data; | |
826 | { | |
827 | register struct ifaddr *ifa = (struct ifaddr *)data; | |
828 | struct ne_softc *ns = &ne_softc[ifp->if_unit]; | |
829 | struct ifreq *ifr = (struct ifreq *)data; | |
830 | int s = splimp(), error = 0; | |
831 | ||
832 | ||
833 | switch (cmd) { | |
834 | ||
835 | case SIOCSIFADDR: | |
836 | ifp->if_flags |= IFF_UP; | |
837 | ||
838 | switch (ifa->ifa_addr->sa_family) { | |
839 | #ifdef INET | |
840 | case AF_INET: | |
841 | neinit(ifp->if_unit); /* before arpwhohas */ | |
842 | ((struct arpcom *)ifp)->ac_ipaddr = | |
843 | IA_SIN(ifa)->sin_addr; | |
844 | arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr); | |
845 | break; | |
846 | #endif | |
847 | #ifdef NS | |
848 | case AF_NS: | |
849 | { | |
850 | register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); | |
851 | ||
852 | if (ns_nullhost(*ina)) | |
b794bfc8 | 853 | ina->x_host = *(union ns_host *)(ns->ns_addr); |
15637ed4 RG |
854 | else { |
855 | /* | |
856 | * The manual says we can't change the address | |
857 | * while the receiver is armed, | |
858 | * so reset everything | |
859 | */ | |
860 | ifp->if_flags &= ~IFF_RUNNING; | |
861 | bcopy((caddr_t)ina->x_host.c_host, | |
b794bfc8 | 862 | (caddr_t)ns->ns_addr, sizeof(ns->ns_addr)); |
15637ed4 RG |
863 | } |
864 | neinit(ifp->if_unit); /* does ne_setaddr() */ | |
865 | break; | |
866 | } | |
867 | #endif | |
868 | default: | |
869 | neinit(ifp->if_unit); | |
870 | break; | |
871 | } | |
872 | break; | |
873 | ||
874 | case SIOCSIFFLAGS: | |
875 | if ((ifp->if_flags & IFF_UP) == 0 && | |
876 | ifp->if_flags & IFF_RUNNING) { | |
877 | ifp->if_flags &= ~IFF_RUNNING; | |
878 | outb(ns->ns_port + ds_cmd, DSCM_STOP|DSCM_NODMA); | |
879 | } else if (ifp->if_flags & IFF_UP && | |
880 | (ifp->if_flags & IFF_RUNNING) == 0) | |
881 | neinit(ifp->if_unit); | |
882 | break; | |
883 | ||
884 | #ifdef notdef | |
885 | case SIOCGHWADDR: | |
b794bfc8 JH |
886 | bcopy((caddr_t)ns->ns_addr, (caddr_t) &ifr->ifr_data, |
887 | sizeof(ns->ns_addr)); | |
15637ed4 RG |
888 | break; |
889 | #endif | |
890 | ||
891 | default: | |
892 | error = EINVAL; | |
893 | } | |
894 | splx(s); | |
895 | return (error); | |
896 | } | |
897 | #endif |