Commit | Line | Data |
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5470412f | 1 | /* if_ec.c 4.7 82/05/07 */ |
75334b2a BF |
2 | |
3 | #include "ec.h" | |
4 | #include "imp.h" | |
be515f6e | 5 | #include "loop.h" |
75334b2a BF |
6 | |
7 | /* | |
8 | * 3Com Ethernet Controller interface | |
9 | */ | |
10 | ||
11 | #include "../h/param.h" | |
12 | #include "../h/systm.h" | |
13 | #include "../h/mbuf.h" | |
14 | #include "../h/pte.h" | |
15 | #include "../h/buf.h" | |
16 | #include "../h/protosw.h" | |
17 | #include "../h/socket.h" | |
18 | #include "../h/ubareg.h" | |
19 | #include "../h/ubavar.h" | |
20 | #include "../h/ecreg.h" | |
21 | #include "../h/cpu.h" | |
22 | #include "../h/mtpr.h" | |
23 | #include "../h/vmmac.h" | |
24 | #include "../net/in.h" | |
25 | #include "../net/in_systm.h" | |
26 | #include "../net/if.h" | |
27 | #include "../net/if_ec.h" | |
28 | #include "../net/if_uba.h" | |
29 | #include "../net/ip.h" | |
30 | #include "../net/ip_var.h" | |
31 | #include "../net/pup.h" | |
32 | #include "../net/route.h" | |
33 | #include <errno.h> | |
34 | ||
35 | #define ECMTU 1500 | |
36 | ||
37 | int ecprobe(), ecattach(), ecrint(), ecxint(), eccollide(); | |
38 | struct uba_device *ecinfo[NEC]; | |
39 | u_short ecstd[] = { 0 }; | |
40 | struct uba_driver ecdriver = | |
41 | { ecprobe, 0, ecattach, 0, ecstd, "ec", ecinfo }; | |
42 | #define ECUNIT(x) minor(x) | |
43 | ||
44 | int ecinit(),ecoutput(),ecreset(); | |
45 | struct mbuf *ecget(); | |
46 | ||
be515f6e BF |
47 | extern struct ifnet loif; |
48 | ||
75334b2a BF |
49 | /* |
50 | * Ethernet software status per interface. | |
51 | * | |
52 | * Each interface is referenced by a network interface structure, | |
53 | * es_if, which the routing code uses to locate the interface. | |
54 | * This structure contains the output queue for the interface, its address, ... | |
55 | * We also have, for each interface, a UBA interface structure, which | |
56 | * contains information about the UNIBUS resources held by the interface: | |
57 | * map registers, buffered data paths, etc. Information is cached in this | |
58 | * structure for use by the if_uba.c routines in running the interface | |
59 | * efficiently. | |
60 | */ | |
61 | struct ec_softc { | |
62 | struct ifnet es_if; /* network-visible interface */ | |
63 | struct ifuba es_ifuba; /* UNIBUS resources */ | |
75334b2a BF |
64 | short es_mask; /* mask for current output delay */ |
65 | #ifdef notdef | |
be515f6e | 66 | short es_delay; /* current output delay */ |
75334b2a BF |
67 | long es_lastx; /* host last transmitted to */ |
68 | #endif | |
69 | short es_oactive; /* is output active? */ | |
70 | caddr_t es_buf[16]; /* virtual addresses of buffers */ | |
71 | u_char es_enaddr[6]; /* board's ethernet address */ | |
72 | } ec_softc[NEC]; | |
73 | ||
74 | /* | |
75 | * Do output DMA to determine interface presence and | |
76 | * interrupt vector. DMA is too short to disturb other hosts. | |
77 | */ | |
78 | ecprobe(reg) | |
79 | caddr_t reg; | |
80 | { | |
81 | register int br, cvec; /* r11, r10 value-result */ | |
82 | register struct ecdevice *addr = (struct ecdevice *)reg; | |
83 | register caddr_t ecbuf = (caddr_t) &umem[0][0600000]; | |
84 | ||
85 | COUNT(ECPROBE); | |
86 | #ifdef lint | |
87 | br = 0; cvec = br; br = cvec; | |
88 | ecrint(0); ecxint(0); eccollide(0); | |
89 | #endif | |
f5a616ae BF |
90 | /* |
91 | * Make sure memory is turned on | |
92 | */ | |
93 | addr->ec_rcr = EC_AROM; | |
75334b2a BF |
94 | /* |
95 | * Check for existence of buffers on Unibus. | |
96 | * This won't work on a 780 until more work is done. | |
97 | */ | |
98 | if (badaddr((caddr_t) ecbuf, 2)) { | |
99 | printf("ec: buffer mem not found"); | |
100 | return (0); | |
101 | } | |
102 | ||
103 | /* | |
104 | * Tell the system that the board has memory here, so it won't | |
105 | * attempt to allocate the addresses later. | |
106 | */ | |
107 | ubamem(0, 0600000, 32*2); | |
108 | ||
109 | /* | |
110 | * Make a one byte packet in what should be buffer #0. | |
111 | * Submit it for sending. This whould cause an xmit interrupt. | |
112 | * The xmit interrupt vector is 8 bytes after the receive vector, | |
113 | * so adjust for this before returning. | |
114 | */ | |
115 | *(u_short *)ecbuf = (u_short) 03777; | |
116 | ecbuf[03777] = '\0'; | |
117 | addr->ec_xcr = EC_XINTEN|EC_XWBN; | |
118 | DELAY(100000); | |
119 | addr->ec_xcr = EC_XCLR; | |
120 | if (cvec > 0 && cvec != 0x200) | |
121 | cvec -= 010; | |
122 | br += 2; | |
123 | return (1); | |
124 | } | |
125 | ||
126 | /* | |
127 | * Interface exists: make available by filling in network interface | |
128 | * record. System will initialize the interface when it is ready | |
129 | * to accept packets. | |
130 | */ | |
131 | ecattach(ui) | |
132 | struct uba_device *ui; | |
133 | { | |
134 | register struct ec_softc *es = &ec_softc[ui->ui_unit]; | |
135 | register struct sockaddr_in *sin; | |
136 | register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; | |
137 | register int i, j; | |
138 | register u_char *cp; | |
139 | COUNT(ECATTACH); | |
140 | ||
141 | es->es_if.if_unit = ui->ui_unit; | |
142 | es->es_if.if_name = "ec"; | |
143 | es->es_if.if_mtu = ECMTU; | |
144 | es->es_if.if_net = ui->ui_flags & 0xff; | |
145 | ||
146 | /* | |
147 | * Read the ethernet address off the board, | |
148 | * one nibble at a time! | |
149 | */ | |
150 | addr->ec_xcr = EC_UECLR; | |
151 | addr->ec_rcr = EC_AROM; | |
152 | cp = es->es_enaddr; | |
153 | for (i=0; i<6; i++) { | |
154 | *cp = 0; | |
155 | for (j=0; j<=4; j+=4) { | |
156 | *cp |= ((addr->ec_rcr >> 8) & 0xf) << j; | |
157 | addr->ec_rcr = EC_AROM|EC_ASTEP; | |
158 | addr->ec_rcr = EC_AROM; | |
159 | addr->ec_rcr = EC_AROM|EC_ASTEP; | |
160 | addr->ec_rcr = EC_AROM; | |
161 | addr->ec_rcr = EC_AROM|EC_ASTEP; | |
162 | addr->ec_rcr = EC_AROM; | |
163 | addr->ec_rcr = EC_AROM|EC_ASTEP; | |
164 | addr->ec_rcr = EC_AROM; | |
165 | } | |
166 | cp++; | |
167 | } | |
168 | printf("ec%d: addr=%x:%x:%x:%x:%x:%x\n", ui->ui_unit, | |
169 | es->es_enaddr[0]&0xff, es->es_enaddr[1]&0xff, | |
170 | es->es_enaddr[2]&0xff, es->es_enaddr[3]&0xff, | |
171 | es->es_enaddr[4]&0xff, es->es_enaddr[5]&0xff); | |
172 | es->es_if.if_host[0] = ((es->es_enaddr[3]&0xff)<<16) | | |
173 | ((es->es_enaddr[4]&0xff)<<8) | (es->es_enaddr[5]&0xff); | |
174 | sin = (struct sockaddr_in *)&es->es_if.if_addr; | |
175 | sin->sin_family = AF_INET; | |
176 | sin->sin_addr = if_makeaddr(es->es_if.if_net, es->es_if.if_host[0]); | |
177 | ||
178 | sin = (struct sockaddr_in *)&es->es_if.if_broadaddr; | |
179 | sin->sin_family = AF_INET; | |
180 | sin->sin_addr = if_makeaddr(es->es_if.if_net, 0); | |
181 | es->es_if.if_flags = IFF_BROADCAST; | |
182 | ||
183 | es->es_if.if_init = ecinit; | |
184 | es->es_if.if_output = ecoutput; | |
185 | es->es_if.if_ubareset = ecreset; | |
186 | for (i=0; i<16; i++) | |
187 | es->es_buf[i] = &umem[ui->ui_ubanum][0600000+2048*i]; | |
188 | if_attach(&es->es_if); | |
189 | #if NIMP == 0 | |
190 | /* here's one for you john baby.... */ | |
191 | if (ui->ui_flags &~ 0xff) | |
192 | eclhinit((ui->ui_flags &~ 0xff) | 0x0a); | |
193 | #endif | |
194 | } | |
195 | ||
196 | /* | |
197 | * Reset of interface after UNIBUS reset. | |
198 | * If interface is on specified uba, reset its state. | |
199 | */ | |
200 | ecreset(unit, uban) | |
201 | int unit, uban; | |
202 | { | |
203 | register struct uba_device *ui; | |
204 | COUNT(ECRESET); | |
205 | ||
206 | if (unit >= NEC || (ui = ecinfo[unit]) == 0 || ui->ui_alive == 0 || | |
207 | ui->ui_ubanum != uban) | |
208 | return; | |
209 | printf(" ec%d", unit); | |
210 | ecinit(unit); | |
211 | } | |
212 | ||
213 | /* | |
214 | * Initialization of interface; clear recorded pending | |
215 | * operations, and reinitialize UNIBUS usage. | |
216 | */ | |
217 | ecinit(unit) | |
218 | int unit; | |
219 | { | |
220 | register struct ec_softc *es = &ec_softc[unit]; | |
221 | register struct uba_device *ui = ecinfo[unit]; | |
222 | register struct ecdevice *addr; | |
223 | register i; | |
224 | int s; | |
225 | ||
226 | #ifdef notdef | |
227 | if (if_ubainit(&es->es_ifuba, ui->ui_ubanum, | |
228 | sizeof (struct ec_header), (int)btoc(ECMTU)) == 0) { | |
229 | printf("ec%d: can't initialize\n", unit); | |
230 | es->es_if.if_flags &= ~IFF_UP; | |
231 | return; | |
232 | } | |
233 | #endif | |
234 | addr = (struct ecdevice *)ui->ui_addr; | |
235 | ||
236 | /* | |
237 | * Hang receive buffers and start any pending | |
238 | * writes by faking a transmit complete. | |
f5a616ae BF |
239 | * Writing into the rcr also makes sure the memory |
240 | * is turned on. | |
75334b2a BF |
241 | */ |
242 | s = splimp(); | |
243 | for (i=ECRHBF; i>=ECRLBF; i--) | |
244 | addr->ec_rcr = EC_READ|i; | |
245 | es->es_oactive = 1; | |
246 | es->es_if.if_flags |= IFF_UP; | |
247 | ecxint(unit); | |
248 | splx(s); | |
249 | if_rtinit(&es->es_if, RTF_DIRECT|RTF_UP); | |
250 | } | |
251 | ||
252 | #ifdef notdef | |
253 | int enalldelay = 0; | |
254 | int eclastdel = 25; | |
255 | int enlastmask = (~0) << 5; | |
256 | #endif | |
257 | ||
258 | /* | |
259 | * Start or restart output on interface. | |
260 | * If interface is already active, then this is a retransmit | |
be515f6e | 261 | * after a collision, and just restuff registers. |
75334b2a BF |
262 | * If interface is not already active, get another datagram |
263 | * to send off of the interface queue, and map it to the interface | |
264 | * before starting the output. | |
265 | */ | |
266 | ecstart(dev) | |
267 | dev_t dev; | |
268 | { | |
269 | int unit = ECUNIT(dev); | |
270 | struct uba_device *ui = ecinfo[unit]; | |
271 | register struct ec_softc *es = &ec_softc[unit]; | |
272 | register struct ecdevice *addr; | |
273 | struct mbuf *m; | |
274 | caddr_t ecbuf; | |
275 | int dest; | |
276 | COUNT(ECSTART); | |
277 | ||
278 | if (es->es_oactive) | |
279 | goto restart; | |
280 | ||
281 | /* | |
282 | * Not already active: dequeue another request | |
283 | * and copy it into the buffer. If no more requests, | |
284 | * just return. | |
285 | */ | |
286 | IF_DEQUEUE(&es->es_if.if_snd, m); | |
287 | if (m == 0) { | |
288 | es->es_oactive = 0; | |
289 | return; | |
290 | } | |
291 | #ifdef notdef | |
292 | dest = mtod(m, struct ec_header *)->ec_dhost; /* wrong! */ | |
293 | #endif | |
294 | ecput(es->es_buf[ECTBF], m); | |
295 | ||
296 | #ifdef notdef | |
297 | /* | |
298 | * Ethernet cannot take back-to-back packets (no | |
299 | * buffering in interface). To avoid overrunning | |
300 | * receivers, enforce a small delay (about 1ms) in interface: | |
301 | * * between all packets when ecalldelay | |
302 | * * whenever last packet was broadcast | |
303 | * * whenever this packet is to same host as last packet | |
304 | */ | |
305 | if (enalldelay || es->es_lastx == 0 || es->es_lastx == dest) { | |
306 | es->es_delay = eclastdel; | |
307 | es->es_mask = eclastmask; | |
308 | } | |
309 | es->es_lastx = dest; | |
310 | #endif | |
311 | ||
312 | restart: | |
313 | /* | |
314 | * Start the output. | |
315 | */ | |
316 | addr = (struct ecdevice *)ui->ui_addr; | |
317 | addr->ec_xcr = EC_WRITE|ECTBF; | |
318 | es->es_oactive = 1; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Ethernet interface transmitter interrupt. | |
323 | * Start another output if more data to send. | |
324 | */ | |
325 | ecxint(unit) | |
326 | int unit; | |
327 | { | |
328 | register struct uba_device *ui = ecinfo[unit]; | |
329 | register struct ec_softc *es = &ec_softc[unit]; | |
330 | register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; | |
331 | COUNT(ECXINT); | |
332 | ||
333 | if (es->es_oactive == 0) | |
334 | return; | |
335 | if (addr->ec_xcr&EC_XDONE == 0 || addr->ec_xcr&EC_XBN != ECTBF) | |
336 | printf("ec%d: strange xmit interrupt!\n", unit); | |
337 | es->es_if.if_opackets++; | |
338 | es->es_oactive = 0; | |
75334b2a BF |
339 | es->es_mask = ~0; |
340 | addr->ec_xcr = EC_XCLR; | |
341 | /* | |
342 | * There shouldn't ever be any mbuf's to free, but just in case... | |
343 | */ | |
344 | if (es->es_ifuba.ifu_xtofree) { | |
345 | m_freem(es->es_ifuba.ifu_xtofree); | |
346 | es->es_ifuba.ifu_xtofree = 0; | |
347 | } | |
348 | if (es->es_if.if_snd.ifq_head == 0) { | |
349 | #ifdef notdef | |
350 | es->es_lastx = 0; /* ? */ | |
351 | #endif | |
352 | return; | |
353 | } | |
354 | ecstart(unit); | |
355 | } | |
356 | ||
357 | /* | |
358 | * Collision on ethernet interface. Do exponential | |
359 | * backoff, and retransmit. If have backed off all | |
360 | * the way print warning diagnostic, and drop packet. | |
361 | */ | |
362 | eccollide(unit) | |
363 | int unit; | |
364 | { | |
365 | struct ec_softc *es = &ec_softc[unit]; | |
366 | COUNT(ECCOLLIDE); | |
367 | ||
be515f6e | 368 | printf("ec%d: collision\n", unit); |
75334b2a BF |
369 | es->es_if.if_collisions++; |
370 | if (es->es_oactive == 0) | |
371 | return; | |
372 | ecdocoll(unit); | |
373 | } | |
374 | ||
375 | ecdocoll(unit) | |
376 | int unit; | |
377 | { | |
378 | register struct ec_softc *es = &ec_softc[unit]; | |
be515f6e BF |
379 | register struct ecdevice *addr = |
380 | (struct ecdevice *)ecinfo[unit]->ui_addr; | |
381 | register i; | |
382 | int delay; | |
75334b2a BF |
383 | |
384 | /* | |
385 | * Es_mask is a 16 bit number with n low zero bits, with | |
386 | * n the number of backoffs. When es_mask is 0 we have | |
387 | * backed off 16 times, and give up. | |
388 | */ | |
389 | if (es->es_mask == 0) { | |
be515f6e | 390 | es->es_if.if_oerrors++; |
75334b2a BF |
391 | printf("ec%d: send error\n", unit); |
392 | /* | |
be515f6e BF |
393 | * Reset interface, then requeue rcv buffers. |
394 | * Some incoming packets may be lost, but that | |
395 | * can't be helped. | |
396 | */ | |
397 | addr->ec_xcr = EC_UECLR; | |
398 | for (i=ECRHBF; i>=ECRLBF; i--) | |
399 | addr->ec_rcr = EC_READ|i; | |
400 | /* | |
401 | * Reset and transmit next packet (if any). | |
75334b2a | 402 | */ |
be515f6e BF |
403 | es->es_oactive = 0; |
404 | es->es_mask = ~0; | |
405 | if (es->es_if.if_snd.ifq_head) | |
406 | ecstart(unit); | |
75334b2a BF |
407 | return; |
408 | } | |
409 | /* | |
be515f6e BF |
410 | * Do exponential backoff. Compute delay based on low bits |
411 | * of the interval timer. Then delay for that number of | |
412 | * slot times. A slot time is 51.2 microseconds (rounded to 51). | |
413 | * This does not take into account the time already used to | |
414 | * process the interrupt. | |
75334b2a BF |
415 | */ |
416 | es->es_mask <<= 1; | |
be515f6e BF |
417 | delay = mfpr(ICR) &~ es->es_mask; |
418 | DELAY(delay * 51); | |
75334b2a | 419 | /* |
be515f6e | 420 | * Clear the controller's collision flag, thus enabling retransmit. |
75334b2a | 421 | */ |
5470412f | 422 | addr->ec_xcr = EC_JINTEN|EC_XINTEN|EC_JCLR; |
75334b2a BF |
423 | } |
424 | ||
425 | #ifdef notdef | |
426 | struct sockaddr_pup pupsrc = { AF_PUP }; | |
427 | struct sockaddr_pup pupdst = { AF_PUP }; | |
428 | struct sockproto pupproto = { PF_PUP }; | |
429 | #endif | |
430 | /* | |
431 | * Ethernet interface receiver interrupt. | |
432 | * If input error just drop packet. | |
433 | * Otherwise purge input buffered data path and examine | |
434 | * packet to determine type. If can't determine length | |
435 | * from type, then have to drop packet. Othewise decapsulate | |
436 | * packet based on type and pass to type specific higher-level | |
437 | * input routine. | |
438 | */ | |
439 | ecrint(unit) | |
440 | int unit; | |
441 | { | |
442 | struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr; | |
443 | COUNT(ECRINT); | |
444 | ||
445 | #ifdef notdef | |
446 | printf("ec%d: ecrint:%d\n", unit, addr->ec_rcr & 0xf); | |
447 | #endif | |
448 | while (addr->ec_rcr & EC_RDONE) | |
449 | ecread(unit); | |
450 | } | |
451 | ||
452 | ecread(unit) | |
453 | int unit; | |
454 | { | |
455 | register struct ec_softc *es = &ec_softc[unit]; | |
456 | struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr; | |
457 | register struct ec_header *ec; | |
458 | struct mbuf *m; | |
459 | int len, off, resid; | |
460 | register struct ifqueue *inq; | |
461 | caddr_t ecbuf; | |
462 | int ecoff; | |
463 | int buf; | |
464 | COUNT(ECREAD); | |
465 | ||
466 | es->es_if.if_ipackets++; | |
467 | buf = addr->ec_rcr & EC_RBN; | |
468 | if (buf < ECRLBF || buf > ECRHBF) | |
469 | panic("ecrint"); | |
470 | ecbuf = es->es_buf[buf]; | |
471 | ecoff = *(short *)ecbuf; | |
be515f6e | 472 | if (ecoff <= ECRDOFF || ecoff > 2046) { |
75334b2a BF |
473 | es->es_if.if_ierrors++; |
474 | #ifdef notdef | |
475 | if (es->es_if.if_ierrors % 100 == 0) | |
476 | printf("ec%d: += 100 input errors\n", unit); | |
477 | #endif | |
478 | printf("ec%d: input error (offset=%d)\n", unit, ecoff); | |
479 | goto setup; | |
480 | } | |
481 | ||
482 | /* | |
483 | * Get input data length. | |
484 | * Get pointer to ethernet header (in input buffer). | |
485 | * Deal with trailer protocol: if type is PUP trailer | |
486 | * get true type from first 16-bit word past data. | |
487 | * Remember that type was trailer by setting off. | |
488 | */ | |
489 | len = ecoff - ECRDOFF - sizeof (struct ec_header); | |
490 | ec = (struct ec_header *)(ecbuf + ECRDOFF); | |
491 | #define ecdataaddr(ec, off, type) ((type)(((caddr_t)((ec)+1)+(off)))) | |
492 | if (ec->ec_type >= ECPUP_TRAIL && | |
493 | ec->ec_type < ECPUP_TRAIL+ECPUP_NTRAILER) { | |
494 | off = (ec->ec_type - ECPUP_TRAIL) * 512; | |
495 | if (off >= ECMTU) | |
496 | goto setup; /* sanity */ | |
497 | ec->ec_type = *ecdataaddr(ec, off, u_short *); | |
498 | resid = *(ecdataaddr(ec, off+2, u_short *)); | |
499 | if (off + resid > len) | |
500 | goto setup; /* sanity */ | |
501 | len = off + resid; | |
502 | } else | |
503 | off = 0; | |
504 | if (len == 0) | |
505 | goto setup; | |
506 | ||
507 | /* | |
508 | * Pull packet off interface. Off is nonzero if packet | |
509 | * has trailing header; ecget will then force this header | |
510 | * information to be at the front, but we still have to drop | |
511 | * the type and length which are at the front of any trailer data. | |
512 | */ | |
513 | m = ecget(ecbuf, len, off); | |
514 | if (m == 0) | |
515 | goto setup; | |
516 | if (off) { | |
517 | m->m_off += 2 * sizeof (u_short); | |
518 | m->m_len -= 2 * sizeof (u_short); | |
519 | } | |
520 | switch (ec->ec_type) { | |
521 | ||
522 | #ifdef INET | |
523 | case ECPUP_IPTYPE: | |
524 | schednetisr(NETISR_IP); | |
525 | inq = &ipintrq; | |
526 | break; | |
527 | #endif | |
528 | #ifdef notdef | |
529 | #ifdef PUP | |
530 | case ECPUP_PUPTYPE: { | |
531 | struct pup_header *pup = mtod(m, struct pup_header *); | |
532 | ||
533 | pupproto.sp_protocol = pup->pup_type; | |
534 | pupdst.spup_addr = pup->pup_dport; | |
535 | pupsrc.spup_addr = pup->pup_sport; | |
57aa3090 SL |
536 | raw_input(m, &pupproto, (struct sockaddr *)&pupsrc, |
537 | (struct sockaddr *)&pupdst); | |
75334b2a BF |
538 | goto setup; |
539 | } | |
540 | #endif | |
541 | #endif | |
542 | default: | |
543 | m_freem(m); | |
544 | goto setup; | |
545 | } | |
546 | ||
547 | if (IF_QFULL(inq)) { | |
548 | IF_DROP(inq); | |
549 | m_freem(m); | |
550 | } else | |
551 | IF_ENQUEUE(inq, m); | |
552 | ||
553 | setup: | |
554 | /* | |
555 | * Reset for next packet. | |
556 | */ | |
557 | addr->ec_rcr = EC_READ|EC_RCLR|buf; | |
558 | } | |
559 | ||
560 | /* | |
561 | * Ethernet output routine. | |
562 | * Encapsulate a packet of type family for the local net. | |
563 | * Use trailer local net encapsulation if enough data in first | |
564 | * packet leaves a multiple of 512 bytes of data in remainder. | |
be515f6e BF |
565 | * If destination is this address or broadcast, send packet to |
566 | * loop device to kludge around the fact that 3com interfaces can't | |
567 | * talk to themselves. | |
75334b2a BF |
568 | */ |
569 | ecoutput(ifp, m0, dst) | |
570 | struct ifnet *ifp; | |
571 | struct mbuf *m0; | |
572 | struct sockaddr *dst; | |
573 | { | |
574 | int type, dest, s, error; | |
575 | register struct ec_softc *es = &ec_softc[ifp->if_unit]; | |
576 | register struct mbuf *m = m0; | |
577 | register struct ec_header *ec; | |
578 | register int off; | |
579 | register int i; | |
be515f6e | 580 | struct mbuf *mcopy = (struct mbuf *) 0; /* Null */ |
75334b2a BF |
581 | |
582 | COUNT(ECOUTPUT); | |
583 | switch (dst->sa_family) { | |
584 | ||
585 | #ifdef INET | |
586 | case AF_INET: | |
587 | dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; | |
be515f6e BF |
588 | if ((dest &~ 0xff) == 0) |
589 | mcopy = m_copy(m, 0, M_COPYALL); | |
590 | else if (dest == ((struct sockaddr_in *)&es->es_if.if_addr)-> | |
591 | sin_addr.s_addr) { | |
592 | mcopy = m; | |
593 | goto gotlocal; | |
594 | } | |
75334b2a BF |
595 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; |
596 | if (off > 0 && (off & 0x1ff) == 0 && | |
597 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { | |
598 | type = ECPUP_TRAIL + (off>>9); | |
599 | m->m_off -= 2 * sizeof (u_short); | |
600 | m->m_len += 2 * sizeof (u_short); | |
601 | *mtod(m, u_short *) = ECPUP_IPTYPE; | |
602 | *(mtod(m, u_short *) + 1) = m->m_len; | |
603 | goto gottrailertype; | |
604 | } | |
605 | type = ECPUP_IPTYPE; | |
606 | off = 0; | |
607 | goto gottype; | |
608 | #endif | |
609 | #ifdef notdef | |
610 | #ifdef PUP | |
611 | case AF_PUP: | |
612 | dest = ((struct sockaddr_pup *)dst)->spup_addr.pp_host; | |
613 | type = ECPUP_PUPTYPE; | |
614 | off = 0; | |
615 | goto gottype; | |
616 | #endif | |
617 | #endif | |
618 | ||
619 | default: | |
620 | printf("ec%d: can't handle af%d\n", ifp->if_unit, | |
621 | dst->sa_family); | |
622 | error = EAFNOSUPPORT; | |
623 | goto bad; | |
624 | } | |
625 | ||
626 | gottrailertype: | |
627 | /* | |
628 | * Packet to be sent as trailer: move first packet | |
629 | * (control information) to end of chain. | |
630 | */ | |
631 | while (m->m_next) | |
632 | m = m->m_next; | |
633 | m->m_next = m0; | |
634 | m = m0->m_next; | |
635 | m0->m_next = 0; | |
636 | m0 = m; | |
637 | ||
638 | gottype: | |
639 | /* | |
640 | * Add local net header. If no space in first mbuf, | |
641 | * allocate another. | |
642 | */ | |
643 | if (m->m_off > MMAXOFF || | |
644 | MMINOFF + sizeof (struct ec_header) > m->m_off) { | |
645 | m = m_get(M_DONTWAIT); | |
646 | if (m == 0) { | |
647 | error = ENOBUFS; | |
648 | goto bad; | |
649 | } | |
650 | m->m_next = m0; | |
651 | m->m_off = MMINOFF; | |
652 | m->m_len = sizeof (struct ec_header); | |
653 | } else { | |
654 | m->m_off -= sizeof (struct ec_header); | |
655 | m->m_len += sizeof (struct ec_header); | |
656 | } | |
657 | ec = mtod(m, struct ec_header *); | |
658 | for (i=0; i<6; i++) | |
659 | ec->ec_shost[i] = es->es_enaddr[i]; | |
f53ac196 | 660 | if ((dest &~ 0xff) == 0) |
75334b2a BF |
661 | for (i=0; i<6; i++) |
662 | ec->ec_dhost[i] = 0xff; | |
663 | else { | |
664 | ec->ec_dhost[0] = es->es_enaddr[0]; | |
665 | ec->ec_dhost[1] = es->es_enaddr[1]; | |
666 | ec->ec_dhost[2] = es->es_enaddr[2]; | |
667 | ec->ec_dhost[3] = (dest>>8) & 0xff; | |
668 | ec->ec_dhost[4] = (dest>>16) & 0xff; | |
669 | ec->ec_dhost[5] = (dest>>24) & 0xff; | |
670 | } | |
671 | ec->ec_type = type; | |
672 | ||
673 | /* | |
674 | * Queue message on interface, and start output if interface | |
675 | * not yet active. | |
676 | */ | |
677 | s = splimp(); | |
678 | if (IF_QFULL(&ifp->if_snd)) { | |
679 | IF_DROP(&ifp->if_snd); | |
680 | error = ENOBUFS; | |
681 | goto qfull; | |
682 | } | |
683 | IF_ENQUEUE(&ifp->if_snd, m); | |
684 | if (es->es_oactive == 0) | |
685 | ecstart(ifp->if_unit); | |
686 | splx(s); | |
be515f6e BF |
687 | gotlocal: |
688 | if (mcopy) /* Kludge, but it works! */ | |
689 | return(looutput(&loif, mcopy, dst)); | |
690 | else | |
691 | return (0); | |
75334b2a BF |
692 | qfull: |
693 | m0 = m; | |
694 | splx(s); | |
695 | bad: | |
696 | m_freem(m0); | |
697 | return(error); | |
698 | } | |
699 | ||
700 | /* | |
701 | * Routine to copy from mbufs to UNIBUS memory. | |
702 | * Similar in spirit to if_wubaput. | |
703 | */ | |
704 | ecput(ecbuf, m) | |
705 | char *ecbuf; | |
706 | struct mbuf *m; | |
707 | { | |
708 | register int len; | |
709 | register struct mbuf *mp; | |
710 | register char *bp, *mcp; | |
711 | register int i; | |
712 | ||
713 | COUNT(ECPUT); | |
714 | len = 0; | |
715 | for (mp=m; mp; mp=mp->m_next) | |
716 | len += mp->m_len; | |
717 | *(u_short *)ecbuf = 2048 - len; | |
718 | bp = ecbuf + 2048 - len; | |
719 | mp = m; | |
720 | while (mp) { | |
721 | mcp = mtod(mp, char *); | |
722 | for (i=0; i<mp->m_len; i++) | |
723 | *bp++ = *mcp++; | |
724 | mp = m_free(mp); | |
725 | } | |
726 | if (bp != ecbuf+2048) | |
727 | printf("ec: bad ecput!\n"); | |
728 | } | |
729 | ||
730 | /* | |
731 | * Routine to copy from UNIBUS memory into mbufs. | |
732 | * Similar in spirit to if_rubaget. | |
733 | */ | |
734 | struct mbuf * | |
735 | ecget(ecbuf, totlen, off0) | |
736 | char *ecbuf; | |
737 | int totlen, off0; | |
738 | { | |
739 | struct mbuf *top, **mp, *m; | |
740 | int off = off0; | |
741 | int len; | |
742 | register char *cp = ecbuf + ECRDOFF + sizeof (struct ec_header); | |
743 | register char *mcp; | |
744 | register int i; | |
745 | ||
746 | COUNT(ECGET); | |
747 | top = 0; | |
748 | mp = ⊤ | |
749 | while (totlen > 0) { | |
750 | MGET(m, 0); | |
751 | if (m == 0) | |
752 | goto bad; | |
753 | if (off) { | |
754 | len = totlen - off; | |
755 | cp = ecbuf + ECRDOFF + sizeof (struct ec_header) + off; | |
756 | } else | |
757 | len = totlen; | |
758 | if (len >= CLBYTES) { | |
759 | struct mbuf *p; | |
760 | ||
761 | MCLGET(p, 1); | |
762 | if (p != 0) { | |
763 | m->m_len = len = CLBYTES; | |
764 | m->m_off = (int)p - (int)m; | |
765 | } else { | |
766 | m->m_len = len = MIN(MLEN, len); | |
767 | m->m_off = MMINOFF; | |
768 | } | |
769 | } else { | |
770 | m->m_len = len = MIN(MLEN, len); | |
771 | m->m_off = MMINOFF; | |
772 | } | |
773 | mcp = mtod(m, char *); | |
774 | for (i=0; i<len; i++) | |
775 | *mcp++ = *cp++; | |
776 | *mp = m; | |
777 | mp = &m->m_next; | |
778 | if (off) { | |
779 | off += len; | |
780 | if (off == totlen) { | |
781 | cp = ecbuf + ECRDOFF + | |
782 | sizeof (struct ec_header); | |
783 | off = 0; | |
784 | totlen = off0; | |
785 | } | |
786 | } else | |
787 | totlen -= len; | |
788 | } | |
789 | return (top); | |
790 | bad: | |
791 | m_freem(top); | |
792 | return (0); | |
793 | } | |
794 | ||
795 | #if NIMP == 0 && NEC > 0 | |
796 | /* | |
797 | * Logical host interface driver. | |
798 | * Allows host to appear as an ARPAnet | |
799 | * logical host. Must also have routing | |
800 | * table entry set up to forward packets | |
801 | * to appropriate gateway on localnet. | |
802 | */ | |
803 | ||
804 | struct ifnet eclhif; | |
805 | int eclhoutput(); | |
806 | ||
807 | /* | |
808 | * Called by localnet interface to allow logical | |
809 | * host interface to "attach". Nothing should ever | |
810 | * be sent locally to this interface, it's purpose | |
811 | * is simply to establish the host's arpanet address. | |
812 | */ | |
813 | eclhinit(addr) | |
814 | int addr; | |
815 | { | |
816 | register struct ifnet *ifp = &eclhif; | |
817 | register struct sockaddr_in *sin; | |
818 | ||
819 | COUNT(ECLHINIT); | |
820 | ifp->if_name = "lh"; | |
821 | ifp->if_mtu = ECMTU; | |
822 | sin = (struct sockaddr_in *)&ifp->if_addr; | |
823 | sin->sin_family = AF_INET; | |
824 | sin->sin_addr.s_addr = addr; | |
825 | ifp->if_net = sin->sin_addr.s_net; | |
826 | ifp->if_flags = IFF_UP; | |
827 | ifp->if_output = eclhoutput; /* should never be used */ | |
828 | if_attach(ifp); | |
829 | } | |
830 | ||
831 | eclhoutput(ifp, m0, dst) | |
832 | struct ifnet *ifp; | |
833 | struct mbuf *m0; | |
834 | struct sockaddr *dst; | |
835 | { | |
836 | COUNT(ECLHOUTPUT); | |
837 | ifp->if_oerrors++; | |
838 | m_freem(m0); | |
839 | return (0); | |
840 | } | |
841 | #endif |