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8daa5182 | 1 | /* if_ec.c 4.8 82/05/20 */ |
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 | 64 | short es_mask; /* mask for current output delay */ |
75334b2a BF |
65 | short es_oactive; /* is output active? */ |
66 | caddr_t es_buf[16]; /* virtual addresses of buffers */ | |
67 | u_char es_enaddr[6]; /* board's ethernet address */ | |
68 | } ec_softc[NEC]; | |
69 | ||
70 | /* | |
71 | * Do output DMA to determine interface presence and | |
72 | * interrupt vector. DMA is too short to disturb other hosts. | |
73 | */ | |
74 | ecprobe(reg) | |
75 | caddr_t reg; | |
76 | { | |
77 | register int br, cvec; /* r11, r10 value-result */ | |
78 | register struct ecdevice *addr = (struct ecdevice *)reg; | |
79 | register caddr_t ecbuf = (caddr_t) &umem[0][0600000]; | |
80 | ||
81 | COUNT(ECPROBE); | |
82 | #ifdef lint | |
83 | br = 0; cvec = br; br = cvec; | |
84 | ecrint(0); ecxint(0); eccollide(0); | |
85 | #endif | |
f5a616ae BF |
86 | /* |
87 | * Make sure memory is turned on | |
88 | */ | |
89 | addr->ec_rcr = EC_AROM; | |
75334b2a BF |
90 | /* |
91 | * Check for existence of buffers on Unibus. | |
92 | * This won't work on a 780 until more work is done. | |
93 | */ | |
94 | if (badaddr((caddr_t) ecbuf, 2)) { | |
95 | printf("ec: buffer mem not found"); | |
96 | return (0); | |
97 | } | |
98 | ||
99 | /* | |
100 | * Tell the system that the board has memory here, so it won't | |
101 | * attempt to allocate the addresses later. | |
102 | */ | |
103 | ubamem(0, 0600000, 32*2); | |
104 | ||
105 | /* | |
106 | * Make a one byte packet in what should be buffer #0. | |
107 | * Submit it for sending. This whould cause an xmit interrupt. | |
108 | * The xmit interrupt vector is 8 bytes after the receive vector, | |
109 | * so adjust for this before returning. | |
110 | */ | |
111 | *(u_short *)ecbuf = (u_short) 03777; | |
112 | ecbuf[03777] = '\0'; | |
113 | addr->ec_xcr = EC_XINTEN|EC_XWBN; | |
114 | DELAY(100000); | |
115 | addr->ec_xcr = EC_XCLR; | |
116 | if (cvec > 0 && cvec != 0x200) | |
117 | cvec -= 010; | |
118 | br += 2; | |
119 | return (1); | |
120 | } | |
121 | ||
122 | /* | |
123 | * Interface exists: make available by filling in network interface | |
124 | * record. System will initialize the interface when it is ready | |
125 | * to accept packets. | |
126 | */ | |
127 | ecattach(ui) | |
128 | struct uba_device *ui; | |
129 | { | |
130 | register struct ec_softc *es = &ec_softc[ui->ui_unit]; | |
131 | register struct sockaddr_in *sin; | |
132 | register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; | |
133 | register int i, j; | |
134 | register u_char *cp; | |
135 | COUNT(ECATTACH); | |
136 | ||
137 | es->es_if.if_unit = ui->ui_unit; | |
138 | es->es_if.if_name = "ec"; | |
139 | es->es_if.if_mtu = ECMTU; | |
140 | es->es_if.if_net = ui->ui_flags & 0xff; | |
141 | ||
142 | /* | |
143 | * Read the ethernet address off the board, | |
144 | * one nibble at a time! | |
145 | */ | |
146 | addr->ec_xcr = EC_UECLR; | |
147 | addr->ec_rcr = EC_AROM; | |
148 | cp = es->es_enaddr; | |
149 | for (i=0; i<6; i++) { | |
150 | *cp = 0; | |
151 | for (j=0; j<=4; j+=4) { | |
152 | *cp |= ((addr->ec_rcr >> 8) & 0xf) << j; | |
153 | addr->ec_rcr = EC_AROM|EC_ASTEP; | |
154 | addr->ec_rcr = EC_AROM; | |
155 | addr->ec_rcr = EC_AROM|EC_ASTEP; | |
156 | addr->ec_rcr = EC_AROM; | |
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 | } | |
162 | cp++; | |
163 | } | |
8daa5182 | 164 | #ifdef notdef |
75334b2a BF |
165 | printf("ec%d: addr=%x:%x:%x:%x:%x:%x\n", ui->ui_unit, |
166 | es->es_enaddr[0]&0xff, es->es_enaddr[1]&0xff, | |
167 | es->es_enaddr[2]&0xff, es->es_enaddr[3]&0xff, | |
168 | es->es_enaddr[4]&0xff, es->es_enaddr[5]&0xff); | |
8daa5182 | 169 | #endif |
75334b2a BF |
170 | es->es_if.if_host[0] = ((es->es_enaddr[3]&0xff)<<16) | |
171 | ((es->es_enaddr[4]&0xff)<<8) | (es->es_enaddr[5]&0xff); | |
172 | sin = (struct sockaddr_in *)&es->es_if.if_addr; | |
173 | sin->sin_family = AF_INET; | |
174 | sin->sin_addr = if_makeaddr(es->es_if.if_net, es->es_if.if_host[0]); | |
175 | ||
176 | sin = (struct sockaddr_in *)&es->es_if.if_broadaddr; | |
177 | sin->sin_family = AF_INET; | |
178 | sin->sin_addr = if_makeaddr(es->es_if.if_net, 0); | |
179 | es->es_if.if_flags = IFF_BROADCAST; | |
180 | ||
181 | es->es_if.if_init = ecinit; | |
182 | es->es_if.if_output = ecoutput; | |
183 | es->es_if.if_ubareset = ecreset; | |
184 | for (i=0; i<16; i++) | |
185 | es->es_buf[i] = &umem[ui->ui_ubanum][0600000+2048*i]; | |
186 | if_attach(&es->es_if); | |
187 | #if NIMP == 0 | |
188 | /* here's one for you john baby.... */ | |
189 | if (ui->ui_flags &~ 0xff) | |
190 | eclhinit((ui->ui_flags &~ 0xff) | 0x0a); | |
191 | #endif | |
192 | } | |
193 | ||
194 | /* | |
195 | * Reset of interface after UNIBUS reset. | |
196 | * If interface is on specified uba, reset its state. | |
197 | */ | |
198 | ecreset(unit, uban) | |
199 | int unit, uban; | |
200 | { | |
201 | register struct uba_device *ui; | |
202 | COUNT(ECRESET); | |
203 | ||
204 | if (unit >= NEC || (ui = ecinfo[unit]) == 0 || ui->ui_alive == 0 || | |
205 | ui->ui_ubanum != uban) | |
206 | return; | |
207 | printf(" ec%d", unit); | |
208 | ecinit(unit); | |
209 | } | |
210 | ||
211 | /* | |
212 | * Initialization of interface; clear recorded pending | |
213 | * operations, and reinitialize UNIBUS usage. | |
214 | */ | |
215 | ecinit(unit) | |
216 | int unit; | |
217 | { | |
218 | register struct ec_softc *es = &ec_softc[unit]; | |
219 | register struct uba_device *ui = ecinfo[unit]; | |
220 | register struct ecdevice *addr; | |
221 | register i; | |
222 | int s; | |
223 | ||
75334b2a BF |
224 | addr = (struct ecdevice *)ui->ui_addr; |
225 | ||
226 | /* | |
227 | * Hang receive buffers and start any pending | |
228 | * writes by faking a transmit complete. | |
f5a616ae BF |
229 | * Writing into the rcr also makes sure the memory |
230 | * is turned on. | |
75334b2a BF |
231 | */ |
232 | s = splimp(); | |
233 | for (i=ECRHBF; i>=ECRLBF; i--) | |
234 | addr->ec_rcr = EC_READ|i; | |
235 | es->es_oactive = 1; | |
236 | es->es_if.if_flags |= IFF_UP; | |
237 | ecxint(unit); | |
238 | splx(s); | |
239 | if_rtinit(&es->es_if, RTF_DIRECT|RTF_UP); | |
240 | } | |
241 | ||
75334b2a BF |
242 | /* |
243 | * Start or restart output on interface. | |
244 | * If interface is already active, then this is a retransmit | |
be515f6e | 245 | * after a collision, and just restuff registers. |
75334b2a BF |
246 | * If interface is not already active, get another datagram |
247 | * to send off of the interface queue, and map it to the interface | |
248 | * before starting the output. | |
249 | */ | |
250 | ecstart(dev) | |
251 | dev_t dev; | |
252 | { | |
253 | int unit = ECUNIT(dev); | |
254 | struct uba_device *ui = ecinfo[unit]; | |
255 | register struct ec_softc *es = &ec_softc[unit]; | |
256 | register struct ecdevice *addr; | |
257 | struct mbuf *m; | |
258 | caddr_t ecbuf; | |
259 | int dest; | |
260 | COUNT(ECSTART); | |
261 | ||
262 | if (es->es_oactive) | |
263 | goto restart; | |
264 | ||
265 | /* | |
266 | * Not already active: dequeue another request | |
267 | * and copy it into the buffer. If no more requests, | |
268 | * just return. | |
269 | */ | |
270 | IF_DEQUEUE(&es->es_if.if_snd, m); | |
271 | if (m == 0) { | |
272 | es->es_oactive = 0; | |
273 | return; | |
274 | } | |
275 | #ifdef notdef | |
276 | dest = mtod(m, struct ec_header *)->ec_dhost; /* wrong! */ | |
277 | #endif | |
278 | ecput(es->es_buf[ECTBF], m); | |
279 | ||
75334b2a BF |
280 | restart: |
281 | /* | |
282 | * Start the output. | |
283 | */ | |
284 | addr = (struct ecdevice *)ui->ui_addr; | |
285 | addr->ec_xcr = EC_WRITE|ECTBF; | |
286 | es->es_oactive = 1; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Ethernet interface transmitter interrupt. | |
291 | * Start another output if more data to send. | |
292 | */ | |
293 | ecxint(unit) | |
294 | int unit; | |
295 | { | |
296 | register struct uba_device *ui = ecinfo[unit]; | |
297 | register struct ec_softc *es = &ec_softc[unit]; | |
298 | register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; | |
299 | COUNT(ECXINT); | |
300 | ||
301 | if (es->es_oactive == 0) | |
302 | return; | |
303 | if (addr->ec_xcr&EC_XDONE == 0 || addr->ec_xcr&EC_XBN != ECTBF) | |
304 | printf("ec%d: strange xmit interrupt!\n", unit); | |
305 | es->es_if.if_opackets++; | |
306 | es->es_oactive = 0; | |
75334b2a BF |
307 | es->es_mask = ~0; |
308 | addr->ec_xcr = EC_XCLR; | |
309 | /* | |
310 | * There shouldn't ever be any mbuf's to free, but just in case... | |
311 | */ | |
312 | if (es->es_ifuba.ifu_xtofree) { | |
313 | m_freem(es->es_ifuba.ifu_xtofree); | |
314 | es->es_ifuba.ifu_xtofree = 0; | |
315 | } | |
8daa5182 | 316 | if (es->es_if.if_snd.ifq_head == 0) |
75334b2a | 317 | return; |
75334b2a BF |
318 | ecstart(unit); |
319 | } | |
320 | ||
321 | /* | |
322 | * Collision on ethernet interface. Do exponential | |
323 | * backoff, and retransmit. If have backed off all | |
324 | * the way print warning diagnostic, and drop packet. | |
325 | */ | |
326 | eccollide(unit) | |
327 | int unit; | |
328 | { | |
329 | struct ec_softc *es = &ec_softc[unit]; | |
330 | COUNT(ECCOLLIDE); | |
331 | ||
be515f6e | 332 | printf("ec%d: collision\n", unit); |
75334b2a BF |
333 | es->es_if.if_collisions++; |
334 | if (es->es_oactive == 0) | |
335 | return; | |
336 | ecdocoll(unit); | |
337 | } | |
338 | ||
339 | ecdocoll(unit) | |
340 | int unit; | |
341 | { | |
342 | register struct ec_softc *es = &ec_softc[unit]; | |
be515f6e BF |
343 | register struct ecdevice *addr = |
344 | (struct ecdevice *)ecinfo[unit]->ui_addr; | |
345 | register i; | |
346 | int delay; | |
75334b2a BF |
347 | |
348 | /* | |
349 | * Es_mask is a 16 bit number with n low zero bits, with | |
350 | * n the number of backoffs. When es_mask is 0 we have | |
351 | * backed off 16 times, and give up. | |
352 | */ | |
353 | if (es->es_mask == 0) { | |
be515f6e | 354 | es->es_if.if_oerrors++; |
75334b2a BF |
355 | printf("ec%d: send error\n", unit); |
356 | /* | |
be515f6e BF |
357 | * Reset interface, then requeue rcv buffers. |
358 | * Some incoming packets may be lost, but that | |
359 | * can't be helped. | |
360 | */ | |
361 | addr->ec_xcr = EC_UECLR; | |
362 | for (i=ECRHBF; i>=ECRLBF; i--) | |
363 | addr->ec_rcr = EC_READ|i; | |
364 | /* | |
365 | * Reset and transmit next packet (if any). | |
75334b2a | 366 | */ |
be515f6e BF |
367 | es->es_oactive = 0; |
368 | es->es_mask = ~0; | |
369 | if (es->es_if.if_snd.ifq_head) | |
370 | ecstart(unit); | |
75334b2a BF |
371 | return; |
372 | } | |
373 | /* | |
be515f6e BF |
374 | * Do exponential backoff. Compute delay based on low bits |
375 | * of the interval timer. Then delay for that number of | |
376 | * slot times. A slot time is 51.2 microseconds (rounded to 51). | |
377 | * This does not take into account the time already used to | |
378 | * process the interrupt. | |
75334b2a BF |
379 | */ |
380 | es->es_mask <<= 1; | |
be515f6e BF |
381 | delay = mfpr(ICR) &~ es->es_mask; |
382 | DELAY(delay * 51); | |
75334b2a | 383 | /* |
be515f6e | 384 | * Clear the controller's collision flag, thus enabling retransmit. |
75334b2a | 385 | */ |
5470412f | 386 | addr->ec_xcr = EC_JINTEN|EC_XINTEN|EC_JCLR; |
75334b2a BF |
387 | } |
388 | ||
75334b2a BF |
389 | /* |
390 | * Ethernet interface receiver interrupt. | |
391 | * If input error just drop packet. | |
392 | * Otherwise purge input buffered data path and examine | |
393 | * packet to determine type. If can't determine length | |
394 | * from type, then have to drop packet. Othewise decapsulate | |
395 | * packet based on type and pass to type specific higher-level | |
396 | * input routine. | |
397 | */ | |
398 | ecrint(unit) | |
399 | int unit; | |
400 | { | |
401 | struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr; | |
402 | COUNT(ECRINT); | |
403 | ||
404 | #ifdef notdef | |
405 | printf("ec%d: ecrint:%d\n", unit, addr->ec_rcr & 0xf); | |
406 | #endif | |
407 | while (addr->ec_rcr & EC_RDONE) | |
408 | ecread(unit); | |
409 | } | |
410 | ||
411 | ecread(unit) | |
412 | int unit; | |
413 | { | |
414 | register struct ec_softc *es = &ec_softc[unit]; | |
415 | struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr; | |
416 | register struct ec_header *ec; | |
417 | struct mbuf *m; | |
418 | int len, off, resid; | |
419 | register struct ifqueue *inq; | |
420 | caddr_t ecbuf; | |
421 | int ecoff; | |
422 | int buf; | |
423 | COUNT(ECREAD); | |
424 | ||
425 | es->es_if.if_ipackets++; | |
426 | buf = addr->ec_rcr & EC_RBN; | |
427 | if (buf < ECRLBF || buf > ECRHBF) | |
428 | panic("ecrint"); | |
429 | ecbuf = es->es_buf[buf]; | |
430 | ecoff = *(short *)ecbuf; | |
be515f6e | 431 | if (ecoff <= ECRDOFF || ecoff > 2046) { |
75334b2a BF |
432 | es->es_if.if_ierrors++; |
433 | #ifdef notdef | |
434 | if (es->es_if.if_ierrors % 100 == 0) | |
435 | printf("ec%d: += 100 input errors\n", unit); | |
436 | #endif | |
437 | printf("ec%d: input error (offset=%d)\n", unit, ecoff); | |
438 | goto setup; | |
439 | } | |
440 | ||
441 | /* | |
442 | * Get input data length. | |
443 | * Get pointer to ethernet header (in input buffer). | |
444 | * Deal with trailer protocol: if type is PUP trailer | |
445 | * get true type from first 16-bit word past data. | |
446 | * Remember that type was trailer by setting off. | |
447 | */ | |
448 | len = ecoff - ECRDOFF - sizeof (struct ec_header); | |
449 | ec = (struct ec_header *)(ecbuf + ECRDOFF); | |
450 | #define ecdataaddr(ec, off, type) ((type)(((caddr_t)((ec)+1)+(off)))) | |
451 | if (ec->ec_type >= ECPUP_TRAIL && | |
452 | ec->ec_type < ECPUP_TRAIL+ECPUP_NTRAILER) { | |
453 | off = (ec->ec_type - ECPUP_TRAIL) * 512; | |
454 | if (off >= ECMTU) | |
455 | goto setup; /* sanity */ | |
456 | ec->ec_type = *ecdataaddr(ec, off, u_short *); | |
457 | resid = *(ecdataaddr(ec, off+2, u_short *)); | |
458 | if (off + resid > len) | |
459 | goto setup; /* sanity */ | |
460 | len = off + resid; | |
461 | } else | |
462 | off = 0; | |
463 | if (len == 0) | |
464 | goto setup; | |
465 | ||
466 | /* | |
467 | * Pull packet off interface. Off is nonzero if packet | |
468 | * has trailing header; ecget will then force this header | |
469 | * information to be at the front, but we still have to drop | |
470 | * the type and length which are at the front of any trailer data. | |
471 | */ | |
472 | m = ecget(ecbuf, len, off); | |
473 | if (m == 0) | |
474 | goto setup; | |
475 | if (off) { | |
476 | m->m_off += 2 * sizeof (u_short); | |
477 | m->m_len -= 2 * sizeof (u_short); | |
478 | } | |
479 | switch (ec->ec_type) { | |
480 | ||
481 | #ifdef INET | |
482 | case ECPUP_IPTYPE: | |
483 | schednetisr(NETISR_IP); | |
484 | inq = &ipintrq; | |
485 | break; | |
75334b2a BF |
486 | #endif |
487 | default: | |
488 | m_freem(m); | |
489 | goto setup; | |
490 | } | |
491 | ||
492 | if (IF_QFULL(inq)) { | |
493 | IF_DROP(inq); | |
494 | m_freem(m); | |
495 | } else | |
496 | IF_ENQUEUE(inq, m); | |
497 | ||
498 | setup: | |
499 | /* | |
500 | * Reset for next packet. | |
501 | */ | |
502 | addr->ec_rcr = EC_READ|EC_RCLR|buf; | |
503 | } | |
504 | ||
505 | /* | |
506 | * Ethernet output routine. | |
507 | * Encapsulate a packet of type family for the local net. | |
508 | * Use trailer local net encapsulation if enough data in first | |
509 | * packet leaves a multiple of 512 bytes of data in remainder. | |
be515f6e BF |
510 | * If destination is this address or broadcast, send packet to |
511 | * loop device to kludge around the fact that 3com interfaces can't | |
512 | * talk to themselves. | |
75334b2a BF |
513 | */ |
514 | ecoutput(ifp, m0, dst) | |
515 | struct ifnet *ifp; | |
516 | struct mbuf *m0; | |
517 | struct sockaddr *dst; | |
518 | { | |
519 | int type, dest, s, error; | |
520 | register struct ec_softc *es = &ec_softc[ifp->if_unit]; | |
521 | register struct mbuf *m = m0; | |
522 | register struct ec_header *ec; | |
523 | register int off; | |
524 | register int i; | |
be515f6e | 525 | struct mbuf *mcopy = (struct mbuf *) 0; /* Null */ |
75334b2a BF |
526 | |
527 | COUNT(ECOUTPUT); | |
528 | switch (dst->sa_family) { | |
529 | ||
530 | #ifdef INET | |
531 | case AF_INET: | |
532 | dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; | |
be515f6e BF |
533 | if ((dest &~ 0xff) == 0) |
534 | mcopy = m_copy(m, 0, M_COPYALL); | |
535 | else if (dest == ((struct sockaddr_in *)&es->es_if.if_addr)-> | |
536 | sin_addr.s_addr) { | |
537 | mcopy = m; | |
538 | goto gotlocal; | |
539 | } | |
75334b2a BF |
540 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; |
541 | if (off > 0 && (off & 0x1ff) == 0 && | |
542 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { | |
543 | type = ECPUP_TRAIL + (off>>9); | |
544 | m->m_off -= 2 * sizeof (u_short); | |
545 | m->m_len += 2 * sizeof (u_short); | |
546 | *mtod(m, u_short *) = ECPUP_IPTYPE; | |
547 | *(mtod(m, u_short *) + 1) = m->m_len; | |
548 | goto gottrailertype; | |
549 | } | |
550 | type = ECPUP_IPTYPE; | |
551 | off = 0; | |
552 | goto gottype; | |
75334b2a BF |
553 | #endif |
554 | ||
555 | default: | |
556 | printf("ec%d: can't handle af%d\n", ifp->if_unit, | |
557 | dst->sa_family); | |
558 | error = EAFNOSUPPORT; | |
559 | goto bad; | |
560 | } | |
561 | ||
562 | gottrailertype: | |
563 | /* | |
564 | * Packet to be sent as trailer: move first packet | |
565 | * (control information) to end of chain. | |
566 | */ | |
567 | while (m->m_next) | |
568 | m = m->m_next; | |
569 | m->m_next = m0; | |
570 | m = m0->m_next; | |
571 | m0->m_next = 0; | |
572 | m0 = m; | |
573 | ||
574 | gottype: | |
575 | /* | |
576 | * Add local net header. If no space in first mbuf, | |
577 | * allocate another. | |
578 | */ | |
579 | if (m->m_off > MMAXOFF || | |
580 | MMINOFF + sizeof (struct ec_header) > m->m_off) { | |
581 | m = m_get(M_DONTWAIT); | |
582 | if (m == 0) { | |
583 | error = ENOBUFS; | |
584 | goto bad; | |
585 | } | |
586 | m->m_next = m0; | |
587 | m->m_off = MMINOFF; | |
588 | m->m_len = sizeof (struct ec_header); | |
589 | } else { | |
590 | m->m_off -= sizeof (struct ec_header); | |
591 | m->m_len += sizeof (struct ec_header); | |
592 | } | |
593 | ec = mtod(m, struct ec_header *); | |
594 | for (i=0; i<6; i++) | |
595 | ec->ec_shost[i] = es->es_enaddr[i]; | |
f53ac196 | 596 | if ((dest &~ 0xff) == 0) |
75334b2a BF |
597 | for (i=0; i<6; i++) |
598 | ec->ec_dhost[i] = 0xff; | |
599 | else { | |
600 | ec->ec_dhost[0] = es->es_enaddr[0]; | |
601 | ec->ec_dhost[1] = es->es_enaddr[1]; | |
602 | ec->ec_dhost[2] = es->es_enaddr[2]; | |
603 | ec->ec_dhost[3] = (dest>>8) & 0xff; | |
604 | ec->ec_dhost[4] = (dest>>16) & 0xff; | |
605 | ec->ec_dhost[5] = (dest>>24) & 0xff; | |
606 | } | |
607 | ec->ec_type = type; | |
608 | ||
609 | /* | |
610 | * Queue message on interface, and start output if interface | |
611 | * not yet active. | |
612 | */ | |
613 | s = splimp(); | |
614 | if (IF_QFULL(&ifp->if_snd)) { | |
615 | IF_DROP(&ifp->if_snd); | |
616 | error = ENOBUFS; | |
617 | goto qfull; | |
618 | } | |
619 | IF_ENQUEUE(&ifp->if_snd, m); | |
620 | if (es->es_oactive == 0) | |
621 | ecstart(ifp->if_unit); | |
622 | splx(s); | |
be515f6e BF |
623 | gotlocal: |
624 | if (mcopy) /* Kludge, but it works! */ | |
625 | return(looutput(&loif, mcopy, dst)); | |
626 | else | |
627 | return (0); | |
75334b2a BF |
628 | qfull: |
629 | m0 = m; | |
630 | splx(s); | |
631 | bad: | |
632 | m_freem(m0); | |
633 | return(error); | |
634 | } | |
635 | ||
636 | /* | |
637 | * Routine to copy from mbufs to UNIBUS memory. | |
638 | * Similar in spirit to if_wubaput. | |
639 | */ | |
640 | ecput(ecbuf, m) | |
641 | char *ecbuf; | |
642 | struct mbuf *m; | |
643 | { | |
644 | register int len; | |
645 | register struct mbuf *mp; | |
646 | register char *bp, *mcp; | |
647 | register int i; | |
648 | ||
649 | COUNT(ECPUT); | |
650 | len = 0; | |
651 | for (mp=m; mp; mp=mp->m_next) | |
652 | len += mp->m_len; | |
653 | *(u_short *)ecbuf = 2048 - len; | |
654 | bp = ecbuf + 2048 - len; | |
655 | mp = m; | |
656 | while (mp) { | |
657 | mcp = mtod(mp, char *); | |
658 | for (i=0; i<mp->m_len; i++) | |
659 | *bp++ = *mcp++; | |
660 | mp = m_free(mp); | |
661 | } | |
662 | if (bp != ecbuf+2048) | |
663 | printf("ec: bad ecput!\n"); | |
664 | } | |
665 | ||
666 | /* | |
667 | * Routine to copy from UNIBUS memory into mbufs. | |
668 | * Similar in spirit to if_rubaget. | |
669 | */ | |
670 | struct mbuf * | |
671 | ecget(ecbuf, totlen, off0) | |
672 | char *ecbuf; | |
673 | int totlen, off0; | |
674 | { | |
675 | struct mbuf *top, **mp, *m; | |
676 | int off = off0; | |
677 | int len; | |
678 | register char *cp = ecbuf + ECRDOFF + sizeof (struct ec_header); | |
679 | register char *mcp; | |
680 | register int i; | |
681 | ||
682 | COUNT(ECGET); | |
683 | top = 0; | |
684 | mp = ⊤ | |
685 | while (totlen > 0) { | |
686 | MGET(m, 0); | |
687 | if (m == 0) | |
688 | goto bad; | |
689 | if (off) { | |
690 | len = totlen - off; | |
691 | cp = ecbuf + ECRDOFF + sizeof (struct ec_header) + off; | |
692 | } else | |
693 | len = totlen; | |
694 | if (len >= CLBYTES) { | |
695 | struct mbuf *p; | |
696 | ||
697 | MCLGET(p, 1); | |
698 | if (p != 0) { | |
699 | m->m_len = len = CLBYTES; | |
700 | m->m_off = (int)p - (int)m; | |
701 | } else { | |
702 | m->m_len = len = MIN(MLEN, len); | |
703 | m->m_off = MMINOFF; | |
704 | } | |
705 | } else { | |
706 | m->m_len = len = MIN(MLEN, len); | |
707 | m->m_off = MMINOFF; | |
708 | } | |
709 | mcp = mtod(m, char *); | |
710 | for (i=0; i<len; i++) | |
711 | *mcp++ = *cp++; | |
712 | *mp = m; | |
713 | mp = &m->m_next; | |
714 | if (off) { | |
715 | off += len; | |
716 | if (off == totlen) { | |
717 | cp = ecbuf + ECRDOFF + | |
718 | sizeof (struct ec_header); | |
719 | off = 0; | |
720 | totlen = off0; | |
721 | } | |
722 | } else | |
723 | totlen -= len; | |
724 | } | |
725 | return (top); | |
726 | bad: | |
727 | m_freem(top); | |
728 | return (0); | |
729 | } | |
730 | ||
731 | #if NIMP == 0 && NEC > 0 | |
732 | /* | |
733 | * Logical host interface driver. | |
734 | * Allows host to appear as an ARPAnet | |
735 | * logical host. Must also have routing | |
736 | * table entry set up to forward packets | |
737 | * to appropriate gateway on localnet. | |
738 | */ | |
739 | ||
740 | struct ifnet eclhif; | |
741 | int eclhoutput(); | |
742 | ||
743 | /* | |
744 | * Called by localnet interface to allow logical | |
745 | * host interface to "attach". Nothing should ever | |
746 | * be sent locally to this interface, it's purpose | |
747 | * is simply to establish the host's arpanet address. | |
748 | */ | |
749 | eclhinit(addr) | |
750 | int addr; | |
751 | { | |
752 | register struct ifnet *ifp = &eclhif; | |
753 | register struct sockaddr_in *sin; | |
754 | ||
755 | COUNT(ECLHINIT); | |
756 | ifp->if_name = "lh"; | |
757 | ifp->if_mtu = ECMTU; | |
758 | sin = (struct sockaddr_in *)&ifp->if_addr; | |
759 | sin->sin_family = AF_INET; | |
760 | sin->sin_addr.s_addr = addr; | |
761 | ifp->if_net = sin->sin_addr.s_net; | |
762 | ifp->if_flags = IFF_UP; | |
763 | ifp->if_output = eclhoutput; /* should never be used */ | |
764 | if_attach(ifp); | |
765 | } | |
766 | ||
767 | eclhoutput(ifp, m0, dst) | |
768 | struct ifnet *ifp; | |
769 | struct mbuf *m0; | |
770 | struct sockaddr *dst; | |
771 | { | |
772 | COUNT(ECLHOUTPUT); | |
773 | ifp->if_oerrors++; | |
774 | m_freem(m0); | |
775 | return (0); | |
776 | } | |
777 | #endif |