Commit | Line | Data |
---|---|---|
b6220e6c | 1 | /* if_ec.c 6.6 85/02/15 */ |
75334b2a BF |
2 | |
3 | #include "ec.h" | |
75334b2a BF |
4 | |
5 | /* | |
6 | * 3Com Ethernet Controller interface | |
7 | */ | |
961945a8 | 8 | #include "../machine/pte.h" |
75334b2a | 9 | |
a6e960e7 JB |
10 | #include "param.h" |
11 | #include "systm.h" | |
12 | #include "mbuf.h" | |
13 | #include "buf.h" | |
14 | #include "protosw.h" | |
15 | #include "socket.h" | |
16 | #include "vmmac.h" | |
17 | #include "ioctl.h" | |
18 | #include "errno.h" | |
a9687d27 BJ |
19 | |
20 | #include "../net/if.h" | |
21 | #include "../net/netisr.h" | |
22 | #include "../net/route.h" | |
d2cc167c BJ |
23 | #include "../netinet/in.h" |
24 | #include "../netinet/in_systm.h" | |
d2cc167c BJ |
25 | #include "../netinet/ip.h" |
26 | #include "../netinet/ip_var.h" | |
8ae4cebd | 27 | #include "../netinet/if_ether.h" |
d2cc167c | 28 | #include "../netpup/pup.h" |
a9687d27 BJ |
29 | |
30 | #include "../vax/cpu.h" | |
31 | #include "../vax/mtpr.h" | |
a6e960e7 JB |
32 | #include "if_ecreg.h" |
33 | #include "if_uba.h" | |
a9687d27 BJ |
34 | #include "../vaxuba/ubareg.h" |
35 | #include "../vaxuba/ubavar.h" | |
75334b2a | 36 | |
b6220e6c MK |
37 | #if CLSIZE == 2 |
38 | #define ECBUFSIZE 32 /* on-board memory, clusters */ | |
3f506470 | 39 | #endif |
3f506470 | 40 | |
b6220e6c | 41 | int ecubamem(), ecprobe(), ecattach(), ecrint(), ecxint(), eccollide(); |
75334b2a BF |
42 | struct uba_device *ecinfo[NEC]; |
43 | u_short ecstd[] = { 0 }; | |
44 | struct uba_driver ecdriver = | |
b6220e6c | 45 | { ecprobe, 0, ecattach, 0, ecstd, "ec", ecinfo, 0, 0, 0, ecubamem }; |
75334b2a | 46 | |
1cd789fb | 47 | int ecinit(),ecioctl(),ecoutput(),ecreset(); |
39d536e6 | 48 | struct mbuf *ecget(); |
75334b2a | 49 | |
be515f6e BF |
50 | extern struct ifnet loif; |
51 | ||
75334b2a BF |
52 | /* |
53 | * Ethernet software status per interface. | |
54 | * | |
55 | * Each interface is referenced by a network interface structure, | |
56 | * es_if, which the routing code uses to locate the interface. | |
57 | * This structure contains the output queue for the interface, its address, ... | |
58 | * We also have, for each interface, a UBA interface structure, which | |
59 | * contains information about the UNIBUS resources held by the interface: | |
60 | * map registers, buffered data paths, etc. Information is cached in this | |
61 | * structure for use by the if_uba.c routines in running the interface | |
62 | * efficiently. | |
63 | */ | |
64 | struct ec_softc { | |
8ae4cebd SL |
65 | struct arpcom es_ac; /* common Ethernet structures */ |
66 | #define es_if es_ac.ac_if /* network-visible interface */ | |
67 | #define es_addr es_ac.ac_enaddr /* hardware Ethernet address */ | |
75334b2a | 68 | struct ifuba es_ifuba; /* UNIBUS resources */ |
75334b2a | 69 | short es_mask; /* mask for current output delay */ |
75334b2a | 70 | short es_oactive; /* is output active? */ |
39d536e6 | 71 | u_char *es_buf[16]; /* virtual addresses of buffers */ |
75334b2a BF |
72 | } ec_softc[NEC]; |
73 | ||
74 | /* | |
b6220e6c MK |
75 | * Configure on-board memory for an interface. |
76 | * Called from autoconfig and after a uba reset. | |
77 | * The address of the memory on the uba is supplied in the device flags. | |
75334b2a | 78 | */ |
b6220e6c MK |
79 | ecubamem(ui, uban) |
80 | register struct uba_device *ui; | |
75334b2a | 81 | { |
b6220e6c MK |
82 | register caddr_t ecbuf = (caddr_t) &umem[uban][ui->ui_flags]; |
83 | register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; | |
75334b2a | 84 | |
b6220e6c MK |
85 | /* |
86 | * Make sure csr is there (we run before ecprobe). | |
87 | */ | |
88 | if (badaddr((caddr_t)addr, 2)) | |
89 | return (-1); | |
90 | #if VAX780 | |
91 | if (cpu == VAX_780 && uba_hd[uban].uh_uba->uba_sr) { | |
92 | uba_hd[uban].uh_uba->uba_sr = uba_hd[uban].uh_uba->uba_sr; | |
93 | return (-1); | |
94 | } | |
75334b2a | 95 | #endif |
f5a616ae BF |
96 | /* |
97 | * Make sure memory is turned on | |
98 | */ | |
99 | addr->ec_rcr = EC_AROM; | |
a26646de | 100 | /* |
b6220e6c MK |
101 | * Tell the system that the board has memory here, so it won't |
102 | * attempt to allocate the addresses later. | |
a26646de | 103 | */ |
b6220e6c MK |
104 | if (ubamem(uban, ui->ui_flags, ECBUFSIZE*CLSIZE, 1) == 0) { |
105 | printf("ec%d: cannot reserve uba addresses\n", ui->ui_unit); | |
106 | addr->ec_rcr = EC_MDISAB; /* disable memory */ | |
107 | return (-1); | |
108 | } | |
75334b2a BF |
109 | /* |
110 | * Check for existence of buffers on Unibus. | |
75334b2a | 111 | */ |
39d536e6 | 112 | if (badaddr((caddr_t)ecbuf, 2)) { |
b6220e6c MK |
113 | bad: |
114 | printf("ec%d: buffer mem not found\n", ui->ui_unit); | |
115 | (void) ubamem(uban, ui->ui_flags, ECBUFSIZE*2, 0); | |
a26646de | 116 | addr->ec_rcr = EC_MDISAB; /* disable memory */ |
b6220e6c | 117 | return (-1); |
75334b2a | 118 | } |
a26646de | 119 | #if VAX780 |
b6220e6c MK |
120 | if (cpu == VAX_780 && uba_hd[uban].uh_uba->uba_sr) { |
121 | uba_hd[uban].uh_uba->uba_sr = uba_hd[uban].uh_uba->uba_sr; | |
122 | goto bad; | |
a26646de BF |
123 | } |
124 | #endif | |
b6220e6c MK |
125 | if (ui->ui_alive == 0) /* Only printf from autoconfig */ |
126 | printf("ec%d: mem %x-%x\n", ui->ui_unit, | |
127 | ui->ui_flags, ui->ui_flags + ECBUFSIZE*CLBYTES - 1); | |
128 | ui->ui_type = 1; /* Memory on, allocated */ | |
129 | return (0); | |
130 | } | |
131 | ||
132 | /* | |
133 | * Do output DMA to determine interface presence and | |
134 | * interrupt vector. DMA is too short to disturb other hosts. | |
135 | */ | |
136 | ecprobe(reg, ui) | |
137 | caddr_t reg; | |
138 | struct uba_device *ui; | |
139 | { | |
140 | register int br, cvec; /* r11, r10 value-result */ | |
141 | register struct ecdevice *addr = (struct ecdevice *)reg; | |
142 | register caddr_t ecbuf = (caddr_t) &umem[ui->ui_ubanum][ui->ui_flags]; | |
143 | ||
144 | #ifdef lint | |
145 | br = 0; cvec = br; br = cvec; | |
146 | ecrint(0); ecxint(0); eccollide(0); | |
147 | #endif | |
75334b2a BF |
148 | |
149 | /* | |
b6220e6c | 150 | * Check that buffer memory was found and enabled. |
75334b2a | 151 | */ |
b6220e6c MK |
152 | if (ui->ui_type == 0) |
153 | return(0); | |
75334b2a BF |
154 | /* |
155 | * Make a one byte packet in what should be buffer #0. | |
b6220e6c | 156 | * Submit it for sending. This should cause an xmit interrupt. |
75334b2a BF |
157 | * The xmit interrupt vector is 8 bytes after the receive vector, |
158 | * so adjust for this before returning. | |
159 | */ | |
160 | *(u_short *)ecbuf = (u_short) 03777; | |
161 | ecbuf[03777] = '\0'; | |
162 | addr->ec_xcr = EC_XINTEN|EC_XWBN; | |
163 | DELAY(100000); | |
164 | addr->ec_xcr = EC_XCLR; | |
0ca845ca | 165 | if (cvec > 0 && cvec != 0x200) { |
a26646de BF |
166 | if (cvec & 04) { /* collision interrupt */ |
167 | cvec -= 04; | |
168 | br += 1; /* rcv is collision + 1 */ | |
169 | } else { /* xmit interrupt */ | |
170 | cvec -= 010; | |
171 | br += 2; /* rcv is xmit + 2 */ | |
172 | } | |
0ca845ca | 173 | } |
75334b2a BF |
174 | return (1); |
175 | } | |
176 | ||
177 | /* | |
178 | * Interface exists: make available by filling in network interface | |
179 | * record. System will initialize the interface when it is ready | |
180 | * to accept packets. | |
181 | */ | |
182 | ecattach(ui) | |
183 | struct uba_device *ui; | |
184 | { | |
0ca845ca SL |
185 | struct ec_softc *es = &ec_softc[ui->ui_unit]; |
186 | register struct ifnet *ifp = &es->es_if; | |
75334b2a | 187 | register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; |
0ca845ca SL |
188 | struct sockaddr_in *sin; |
189 | int i, j; | |
190 | u_char *cp; | |
75334b2a | 191 | |
0ca845ca SL |
192 | ifp->if_unit = ui->ui_unit; |
193 | ifp->if_name = "ec"; | |
3fa8d9bb | 194 | ifp->if_mtu = ETHERMTU; |
75334b2a BF |
195 | |
196 | /* | |
0ca845ca | 197 | * Read the ethernet address off the board, one nibble at a time. |
75334b2a BF |
198 | */ |
199 | addr->ec_xcr = EC_UECLR; | |
200 | addr->ec_rcr = EC_AROM; | |
0217ce84 | 201 | cp = (u_char *) &es->es_addr; |
0ca845ca | 202 | #define NEXTBIT addr->ec_rcr = EC_AROM|EC_ASTEP; addr->ec_rcr = EC_AROM |
0217ce84 | 203 | for (i=0; i < sizeof (es->es_addr); i++) { |
75334b2a BF |
204 | *cp = 0; |
205 | for (j=0; j<=4; j+=4) { | |
206 | *cp |= ((addr->ec_rcr >> 8) & 0xf) << j; | |
0ca845ca | 207 | NEXTBIT; NEXTBIT; NEXTBIT; NEXTBIT; |
75334b2a BF |
208 | } |
209 | cp++; | |
210 | } | |
75334b2a BF |
211 | sin = (struct sockaddr_in *)&es->es_if.if_addr; |
212 | sin->sin_family = AF_INET; | |
0ca845ca | 213 | ifp->if_init = ecinit; |
1cd789fb | 214 | ifp->if_ioctl = ecioctl; |
0ca845ca | 215 | ifp->if_output = ecoutput; |
51595ca2 | 216 | ifp->if_reset = ecreset; |
75334b2a | 217 | for (i=0; i<16; i++) |
3f506470 | 218 | es->es_buf[i] |
b6220e6c | 219 | = (u_char *)&umem[ui->ui_ubanum][ui->ui_flags + 2048*i]; |
0ca845ca | 220 | if_attach(ifp); |
75334b2a BF |
221 | } |
222 | ||
223 | /* | |
224 | * Reset of interface after UNIBUS reset. | |
225 | * If interface is on specified uba, reset its state. | |
226 | */ | |
227 | ecreset(unit, uban) | |
228 | int unit, uban; | |
229 | { | |
230 | register struct uba_device *ui; | |
75334b2a BF |
231 | |
232 | if (unit >= NEC || (ui = ecinfo[unit]) == 0 || ui->ui_alive == 0 || | |
233 | ui->ui_ubanum != uban) | |
234 | return; | |
235 | printf(" ec%d", unit); | |
ce3f80e9 | 236 | ec_softc[unit].es_if.if_flags &= ~IFF_RUNNING; |
75334b2a BF |
237 | ecinit(unit); |
238 | } | |
239 | ||
240 | /* | |
241 | * Initialization of interface; clear recorded pending | |
242 | * operations, and reinitialize UNIBUS usage. | |
243 | */ | |
244 | ecinit(unit) | |
245 | int unit; | |
246 | { | |
0ca845ca SL |
247 | struct ec_softc *es = &ec_softc[unit]; |
248 | struct ecdevice *addr; | |
8ae4cebd | 249 | register struct ifnet *ifp = &es->es_if; |
44eb2da3 | 250 | register struct sockaddr_in *sin; |
1cd789fb | 251 | int i, s; |
8ae4cebd SL |
252 | |
253 | sin = (struct sockaddr_in *)&ifp->if_addr; | |
1cd789fb | 254 | if (sin->sin_addr.s_addr == 0) /* address still unknown */ |
8ae4cebd | 255 | return; |
75334b2a BF |
256 | |
257 | /* | |
a0d46072 | 258 | * Hang receive buffers and start any pending writes. |
f5a616ae BF |
259 | * Writing into the rcr also makes sure the memory |
260 | * is turned on. | |
75334b2a | 261 | */ |
1cd789fb SL |
262 | if ((es->es_if.if_flags & IFF_RUNNING) == 0) { |
263 | addr = (struct ecdevice *)ecinfo[unit]->ui_addr; | |
264 | s = splimp(); | |
265 | for (i = ECRHBF; i >= ECRLBF; i--) | |
266 | addr->ec_rcr = EC_READ | i; | |
267 | es->es_oactive = 0; | |
268 | es->es_mask = ~0; | |
269 | es->es_if.if_flags |= IFF_UP|IFF_RUNNING; | |
270 | if (es->es_if.if_snd.ifq_head) | |
271 | ecstart(unit); | |
272 | splx(s); | |
273 | } | |
a13c006d | 274 | if_rtinit(&es->es_if, RTF_UP); |
8ae4cebd | 275 | arpwhohas(&es->es_ac, &sin->sin_addr); |
75334b2a BF |
276 | } |
277 | ||
75334b2a BF |
278 | /* |
279 | * Start or restart output on interface. | |
280 | * If interface is already active, then this is a retransmit | |
be515f6e | 281 | * after a collision, and just restuff registers. |
75334b2a BF |
282 | * If interface is not already active, get another datagram |
283 | * to send off of the interface queue, and map it to the interface | |
284 | * before starting the output. | |
285 | */ | |
b6220e6c | 286 | ecstart(unit) |
75334b2a | 287 | { |
0ca845ca SL |
288 | struct ec_softc *es = &ec_softc[unit]; |
289 | struct ecdevice *addr; | |
75334b2a | 290 | struct mbuf *m; |
75334b2a BF |
291 | |
292 | if (es->es_oactive) | |
293 | goto restart; | |
294 | ||
75334b2a BF |
295 | IF_DEQUEUE(&es->es_if.if_snd, m); |
296 | if (m == 0) { | |
297 | es->es_oactive = 0; | |
298 | return; | |
299 | } | |
75334b2a BF |
300 | ecput(es->es_buf[ECTBF], m); |
301 | ||
75334b2a | 302 | restart: |
0ca845ca | 303 | addr = (struct ecdevice *)ecinfo[unit]->ui_addr; |
75334b2a BF |
304 | addr->ec_xcr = EC_WRITE|ECTBF; |
305 | es->es_oactive = 1; | |
306 | } | |
307 | ||
308 | /* | |
309 | * Ethernet interface transmitter interrupt. | |
310 | * Start another output if more data to send. | |
311 | */ | |
312 | ecxint(unit) | |
313 | int unit; | |
314 | { | |
75334b2a | 315 | register struct ec_softc *es = &ec_softc[unit]; |
0ca845ca SL |
316 | register struct ecdevice *addr = |
317 | (struct ecdevice *)ecinfo[unit]->ui_addr; | |
75334b2a BF |
318 | |
319 | if (es->es_oactive == 0) | |
320 | return; | |
0ca845ca SL |
321 | if ((addr->ec_xcr&EC_XDONE) == 0 || (addr->ec_xcr&EC_XBN) != ECTBF) { |
322 | printf("ec%d: stray xmit interrupt, xcr=%b\n", unit, | |
323 | addr->ec_xcr, EC_XBITS); | |
324 | es->es_oactive = 0; | |
325 | addr->ec_xcr = EC_XCLR; | |
326 | return; | |
327 | } | |
75334b2a BF |
328 | es->es_if.if_opackets++; |
329 | es->es_oactive = 0; | |
75334b2a BF |
330 | es->es_mask = ~0; |
331 | addr->ec_xcr = EC_XCLR; | |
0ca845ca SL |
332 | if (es->es_if.if_snd.ifq_head) |
333 | ecstart(unit); | |
75334b2a BF |
334 | } |
335 | ||
336 | /* | |
337 | * Collision on ethernet interface. Do exponential | |
338 | * backoff, and retransmit. If have backed off all | |
339 | * the way print warning diagnostic, and drop packet. | |
340 | */ | |
341 | eccollide(unit) | |
342 | int unit; | |
343 | { | |
344 | struct ec_softc *es = &ec_softc[unit]; | |
75334b2a | 345 | |
75334b2a | 346 | es->es_if.if_collisions++; |
0ca845ca SL |
347 | if (es->es_oactive) |
348 | ecdocoll(unit); | |
75334b2a BF |
349 | } |
350 | ||
351 | ecdocoll(unit) | |
352 | int unit; | |
353 | { | |
354 | register struct ec_softc *es = &ec_softc[unit]; | |
be515f6e BF |
355 | register struct ecdevice *addr = |
356 | (struct ecdevice *)ecinfo[unit]->ui_addr; | |
357 | register i; | |
358 | int delay; | |
75334b2a BF |
359 | |
360 | /* | |
361 | * Es_mask is a 16 bit number with n low zero bits, with | |
362 | * n the number of backoffs. When es_mask is 0 we have | |
363 | * backed off 16 times, and give up. | |
364 | */ | |
365 | if (es->es_mask == 0) { | |
be515f6e | 366 | es->es_if.if_oerrors++; |
75334b2a BF |
367 | printf("ec%d: send error\n", unit); |
368 | /* | |
be515f6e BF |
369 | * Reset interface, then requeue rcv buffers. |
370 | * Some incoming packets may be lost, but that | |
371 | * can't be helped. | |
372 | */ | |
373 | addr->ec_xcr = EC_UECLR; | |
374 | for (i=ECRHBF; i>=ECRLBF; i--) | |
375 | addr->ec_rcr = EC_READ|i; | |
376 | /* | |
377 | * Reset and transmit next packet (if any). | |
75334b2a | 378 | */ |
be515f6e BF |
379 | es->es_oactive = 0; |
380 | es->es_mask = ~0; | |
381 | if (es->es_if.if_snd.ifq_head) | |
382 | ecstart(unit); | |
75334b2a BF |
383 | return; |
384 | } | |
385 | /* | |
be515f6e BF |
386 | * Do exponential backoff. Compute delay based on low bits |
387 | * of the interval timer. Then delay for that number of | |
388 | * slot times. A slot time is 51.2 microseconds (rounded to 51). | |
389 | * This does not take into account the time already used to | |
390 | * process the interrupt. | |
75334b2a BF |
391 | */ |
392 | es->es_mask <<= 1; | |
be515f6e BF |
393 | delay = mfpr(ICR) &~ es->es_mask; |
394 | DELAY(delay * 51); | |
75334b2a | 395 | /* |
be515f6e | 396 | * Clear the controller's collision flag, thus enabling retransmit. |
75334b2a | 397 | */ |
a26646de | 398 | addr->ec_xcr = EC_CLEAR; |
75334b2a BF |
399 | } |
400 | ||
75334b2a BF |
401 | /* |
402 | * Ethernet interface receiver interrupt. | |
403 | * If input error just drop packet. | |
404 | * Otherwise purge input buffered data path and examine | |
405 | * packet to determine type. If can't determine length | |
406 | * from type, then have to drop packet. Othewise decapsulate | |
407 | * packet based on type and pass to type specific higher-level | |
408 | * input routine. | |
409 | */ | |
410 | ecrint(unit) | |
411 | int unit; | |
412 | { | |
413 | struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr; | |
75334b2a | 414 | |
75334b2a BF |
415 | while (addr->ec_rcr & EC_RDONE) |
416 | ecread(unit); | |
417 | } | |
418 | ||
419 | ecread(unit) | |
420 | int unit; | |
421 | { | |
422 | register struct ec_softc *es = &ec_softc[unit]; | |
423 | struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr; | |
3fa8d9bb | 424 | register struct ether_header *ec; |
75334b2a | 425 | struct mbuf *m; |
39d536e6 | 426 | int len, off, resid, ecoff, rbuf; |
75334b2a | 427 | register struct ifqueue *inq; |
39d536e6 | 428 | u_char *ecbuf; |
75334b2a BF |
429 | |
430 | es->es_if.if_ipackets++; | |
39d536e6 BJ |
431 | rbuf = addr->ec_rcr & EC_RBN; |
432 | if (rbuf < ECRLBF || rbuf > ECRHBF) | |
75334b2a | 433 | panic("ecrint"); |
39d536e6 | 434 | ecbuf = es->es_buf[rbuf]; |
75334b2a | 435 | ecoff = *(short *)ecbuf; |
be515f6e | 436 | if (ecoff <= ECRDOFF || ecoff > 2046) { |
75334b2a BF |
437 | es->es_if.if_ierrors++; |
438 | #ifdef notdef | |
439 | if (es->es_if.if_ierrors % 100 == 0) | |
440 | printf("ec%d: += 100 input errors\n", unit); | |
441 | #endif | |
75334b2a BF |
442 | goto setup; |
443 | } | |
444 | ||
445 | /* | |
446 | * Get input data length. | |
447 | * Get pointer to ethernet header (in input buffer). | |
448 | * Deal with trailer protocol: if type is PUP trailer | |
449 | * get true type from first 16-bit word past data. | |
450 | * Remember that type was trailer by setting off. | |
451 | */ | |
3fa8d9bb SL |
452 | len = ecoff - ECRDOFF - sizeof (struct ether_header); |
453 | ec = (struct ether_header *)(ecbuf + ECRDOFF); | |
454 | ec->ether_type = ntohs((u_short)ec->ether_type); | |
75334b2a | 455 | #define ecdataaddr(ec, off, type) ((type)(((caddr_t)((ec)+1)+(off)))) |
3fa8d9bb SL |
456 | if (ec->ether_type >= ETHERPUP_TRAIL && |
457 | ec->ether_type < ETHERPUP_TRAIL+ETHERPUP_NTRAILER) { | |
458 | off = (ec->ether_type - ETHERPUP_TRAIL) * 512; | |
459 | if (off >= ETHERMTU) | |
75334b2a | 460 | goto setup; /* sanity */ |
3fa8d9bb SL |
461 | ec->ether_type = ntohs(*ecdataaddr(ec, off, u_short *)); |
462 | resid = ntohs(*(ecdataaddr(ec, off+2, u_short *))); | |
75334b2a BF |
463 | if (off + resid > len) |
464 | goto setup; /* sanity */ | |
465 | len = off + resid; | |
466 | } else | |
467 | off = 0; | |
468 | if (len == 0) | |
469 | goto setup; | |
470 | ||
471 | /* | |
472 | * Pull packet off interface. Off is nonzero if packet | |
473 | * has trailing header; ecget will then force this header | |
474 | * information to be at the front, but we still have to drop | |
475 | * the type and length which are at the front of any trailer data. | |
476 | */ | |
477 | m = ecget(ecbuf, len, off); | |
478 | if (m == 0) | |
479 | goto setup; | |
480 | if (off) { | |
481 | m->m_off += 2 * sizeof (u_short); | |
482 | m->m_len -= 2 * sizeof (u_short); | |
483 | } | |
3fa8d9bb | 484 | switch (ec->ether_type) { |
75334b2a BF |
485 | |
486 | #ifdef INET | |
3fa8d9bb | 487 | case ETHERPUP_IPTYPE: |
75334b2a BF |
488 | schednetisr(NETISR_IP); |
489 | inq = &ipintrq; | |
490 | break; | |
8ae4cebd SL |
491 | |
492 | case ETHERPUP_ARPTYPE: | |
493 | arpinput(&es->es_ac, m); | |
27bcf34c | 494 | goto setup; |
75334b2a BF |
495 | #endif |
496 | default: | |
497 | m_freem(m); | |
498 | goto setup; | |
499 | } | |
500 | ||
501 | if (IF_QFULL(inq)) { | |
502 | IF_DROP(inq); | |
503 | m_freem(m); | |
0ca845ca SL |
504 | goto setup; |
505 | } | |
506 | IF_ENQUEUE(inq, m); | |
75334b2a BF |
507 | |
508 | setup: | |
509 | /* | |
510 | * Reset for next packet. | |
511 | */ | |
39d536e6 | 512 | addr->ec_rcr = EC_READ|EC_RCLR|rbuf; |
75334b2a BF |
513 | } |
514 | ||
515 | /* | |
516 | * Ethernet output routine. | |
517 | * Encapsulate a packet of type family for the local net. | |
518 | * Use trailer local net encapsulation if enough data in first | |
519 | * packet leaves a multiple of 512 bytes of data in remainder. | |
be515f6e BF |
520 | * If destination is this address or broadcast, send packet to |
521 | * loop device to kludge around the fact that 3com interfaces can't | |
522 | * talk to themselves. | |
75334b2a BF |
523 | */ |
524 | ecoutput(ifp, m0, dst) | |
525 | struct ifnet *ifp; | |
526 | struct mbuf *m0; | |
527 | struct sockaddr *dst; | |
528 | { | |
8ae4cebd | 529 | int type, s, error; |
0217ce84 | 530 | struct ether_addr edst; |
8ae4cebd | 531 | struct in_addr idst; |
75334b2a BF |
532 | register struct ec_softc *es = &ec_softc[ifp->if_unit]; |
533 | register struct mbuf *m = m0; | |
3fa8d9bb | 534 | register struct ether_header *ec; |
66923854 | 535 | register int off; |
8ae4cebd | 536 | struct mbuf *mcopy = (struct mbuf *)0; |
75334b2a | 537 | |
75334b2a BF |
538 | switch (dst->sa_family) { |
539 | ||
540 | #ifdef INET | |
541 | case AF_INET: | |
8ae4cebd | 542 | idst = ((struct sockaddr_in *)dst)->sin_addr; |
0217ce84 | 543 | if (!arpresolve(&es->es_ac, m, &idst, &edst)) |
8ae4cebd SL |
544 | return (0); /* if not yet resolved */ |
545 | if (in_lnaof(idst) == INADDR_ANY) | |
92aca3da | 546 | mcopy = m_copy(m, 0, (int)M_COPYALL); |
75334b2a | 547 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; |
1cd789fb SL |
548 | /* need per host negotiation */ |
549 | if ((ifp->if_flags & IFF_NOTRAILERS) == 0) | |
75334b2a BF |
550 | if (off > 0 && (off & 0x1ff) == 0 && |
551 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { | |
3fa8d9bb | 552 | type = ETHERPUP_TRAIL + (off>>9); |
75334b2a BF |
553 | m->m_off -= 2 * sizeof (u_short); |
554 | m->m_len += 2 * sizeof (u_short); | |
3fa8d9bb SL |
555 | *mtod(m, u_short *) = ntohs((u_short)ETHERPUP_IPTYPE); |
556 | *(mtod(m, u_short *) + 1) = ntohs((u_short)m->m_len); | |
75334b2a BF |
557 | goto gottrailertype; |
558 | } | |
3fa8d9bb | 559 | type = ETHERPUP_IPTYPE; |
75334b2a BF |
560 | off = 0; |
561 | goto gottype; | |
75334b2a BF |
562 | #endif |
563 | ||
8ae4cebd SL |
564 | case AF_UNSPEC: |
565 | ec = (struct ether_header *)dst->sa_data; | |
0217ce84 | 566 | edst = ec->ether_dhost; |
8ae4cebd SL |
567 | type = ec->ether_type; |
568 | goto gottype; | |
569 | ||
75334b2a BF |
570 | default: |
571 | printf("ec%d: can't handle af%d\n", ifp->if_unit, | |
572 | dst->sa_family); | |
573 | error = EAFNOSUPPORT; | |
574 | goto bad; | |
575 | } | |
576 | ||
577 | gottrailertype: | |
578 | /* | |
579 | * Packet to be sent as trailer: move first packet | |
580 | * (control information) to end of chain. | |
581 | */ | |
582 | while (m->m_next) | |
583 | m = m->m_next; | |
584 | m->m_next = m0; | |
585 | m = m0->m_next; | |
586 | m0->m_next = 0; | |
587 | m0 = m; | |
588 | ||
589 | gottype: | |
590 | /* | |
591 | * Add local net header. If no space in first mbuf, | |
592 | * allocate another. | |
593 | */ | |
594 | if (m->m_off > MMAXOFF || | |
3fa8d9bb | 595 | MMINOFF + sizeof (struct ether_header) > m->m_off) { |
cce93e4b | 596 | m = m_get(M_DONTWAIT, MT_HEADER); |
75334b2a BF |
597 | if (m == 0) { |
598 | error = ENOBUFS; | |
599 | goto bad; | |
600 | } | |
601 | m->m_next = m0; | |
602 | m->m_off = MMINOFF; | |
3fa8d9bb | 603 | m->m_len = sizeof (struct ether_header); |
75334b2a | 604 | } else { |
3fa8d9bb SL |
605 | m->m_off -= sizeof (struct ether_header); |
606 | m->m_len += sizeof (struct ether_header); | |
75334b2a | 607 | } |
3fa8d9bb | 608 | ec = mtod(m, struct ether_header *); |
0217ce84 MK |
609 | ec->ether_dhost = edst; |
610 | ec->ether_shost = es->es_addr; | |
3fa8d9bb | 611 | ec->ether_type = htons((u_short)type); |
75334b2a BF |
612 | |
613 | /* | |
614 | * Queue message on interface, and start output if interface | |
615 | * not yet active. | |
616 | */ | |
617 | s = splimp(); | |
618 | if (IF_QFULL(&ifp->if_snd)) { | |
619 | IF_DROP(&ifp->if_snd); | |
620 | error = ENOBUFS; | |
621 | goto qfull; | |
622 | } | |
623 | IF_ENQUEUE(&ifp->if_snd, m); | |
624 | if (es->es_oactive == 0) | |
625 | ecstart(ifp->if_unit); | |
626 | splx(s); | |
66923854 | 627 | return (mcopy ? looutput(&loif, mcopy, dst) : 0); |
0ca845ca | 628 | |
75334b2a BF |
629 | qfull: |
630 | m0 = m; | |
631 | splx(s); | |
632 | bad: | |
633 | m_freem(m0); | |
ce3f80e9 MK |
634 | if (mcopy) |
635 | m_freem(mcopy); | |
66923854 | 636 | return (error); |
75334b2a BF |
637 | } |
638 | ||
639 | /* | |
4fce3bf9 | 640 | * Routine to copy from mbuf chain to transmit |
0ca845ca | 641 | * buffer in UNIBUS memory. |
4fce3bf9 SL |
642 | * If packet size is less than the minimum legal size, |
643 | * the buffer is expanded. We probably should zero out the extra | |
644 | * bytes for security, but that would slow things down. | |
75334b2a BF |
645 | */ |
646 | ecput(ecbuf, m) | |
0ca845ca | 647 | u_char *ecbuf; |
75334b2a BF |
648 | struct mbuf *m; |
649 | { | |
75334b2a | 650 | register struct mbuf *mp; |
0ca845ca | 651 | register int off; |
48db90de | 652 | u_char *bp; |
75334b2a | 653 | |
0ca845ca SL |
654 | for (off = 2048, mp = m; mp; mp = mp->m_next) |
655 | off -= mp->m_len; | |
3fa8d9bb SL |
656 | if (2048 - off < ETHERMIN + sizeof (struct ether_header)) |
657 | off = 2048 - ETHERMIN - sizeof (struct ether_header); | |
0ca845ca SL |
658 | *(u_short *)ecbuf = off; |
659 | bp = (u_char *)(ecbuf + off); | |
48db90de SL |
660 | for (mp = m; mp; mp = mp->m_next) { |
661 | register unsigned len = mp->m_len; | |
662 | u_char *mcp; | |
0ca845ca | 663 | |
0ca845ca SL |
664 | if (len == 0) |
665 | continue; | |
666 | mcp = mtod(mp, u_char *); | |
667 | if ((unsigned)bp & 01) { | |
4a404244 | 668 | *bp++ = *mcp++; |
0ca845ca | 669 | len--; |
4a404244 | 670 | } |
48db90de SL |
671 | if (off = (len >> 1)) { |
672 | register u_short *to, *from; | |
673 | ||
674 | to = (u_short *)bp; | |
675 | from = (u_short *)mcp; | |
676 | do | |
677 | *to++ = *from++; | |
678 | while (--off > 0); | |
679 | bp = (u_char *)to, | |
680 | mcp = (u_char *)from; | |
4a404244 | 681 | } |
48db90de | 682 | if (len & 01) |
75334b2a | 683 | *bp++ = *mcp++; |
75334b2a | 684 | } |
48db90de | 685 | m_freem(m); |
75334b2a BF |
686 | } |
687 | ||
688 | /* | |
689 | * Routine to copy from UNIBUS memory into mbufs. | |
690 | * Similar in spirit to if_rubaget. | |
4a404244 BJ |
691 | * |
692 | * Warning: This makes the fairly safe assumption that | |
693 | * mbufs have even lengths. | |
75334b2a BF |
694 | */ |
695 | struct mbuf * | |
696 | ecget(ecbuf, totlen, off0) | |
48db90de | 697 | u_char *ecbuf; |
75334b2a BF |
698 | int totlen, off0; |
699 | { | |
48db90de SL |
700 | register struct mbuf *m; |
701 | struct mbuf *top = 0, **mp = ⊤ | |
702 | register int off = off0, len; | |
703 | u_char *cp; | |
75334b2a | 704 | |
3fa8d9bb | 705 | cp = ecbuf + ECRDOFF + sizeof (struct ether_header); |
75334b2a | 706 | while (totlen > 0) { |
48db90de SL |
707 | register int words; |
708 | u_char *mcp; | |
709 | ||
cce93e4b | 710 | MGET(m, M_DONTWAIT, MT_DATA); |
75334b2a BF |
711 | if (m == 0) |
712 | goto bad; | |
713 | if (off) { | |
714 | len = totlen - off; | |
3fa8d9bb SL |
715 | cp = ecbuf + ECRDOFF + |
716 | sizeof (struct ether_header) + off; | |
75334b2a BF |
717 | } else |
718 | len = totlen; | |
719 | if (len >= CLBYTES) { | |
720 | struct mbuf *p; | |
721 | ||
722 | MCLGET(p, 1); | |
723 | if (p != 0) { | |
724 | m->m_len = len = CLBYTES; | |
725 | m->m_off = (int)p - (int)m; | |
726 | } else { | |
727 | m->m_len = len = MIN(MLEN, len); | |
728 | m->m_off = MMINOFF; | |
729 | } | |
730 | } else { | |
731 | m->m_len = len = MIN(MLEN, len); | |
732 | m->m_off = MMINOFF; | |
733 | } | |
48db90de SL |
734 | mcp = mtod(m, u_char *); |
735 | if (words = (len >> 1)) { | |
736 | register u_short *to, *from; | |
737 | ||
738 | to = (u_short *)mcp; | |
739 | from = (u_short *)cp; | |
740 | do | |
741 | *to++ = *from++; | |
742 | while (--words > 0); | |
743 | mcp = (u_char *)to; | |
744 | cp = (u_char *)from; | |
4a404244 | 745 | } |
0ca845ca | 746 | if (len & 01) |
75334b2a BF |
747 | *mcp++ = *cp++; |
748 | *mp = m; | |
749 | mp = &m->m_next; | |
48db90de | 750 | if (off == 0) { |
75334b2a | 751 | totlen -= len; |
48db90de SL |
752 | continue; |
753 | } | |
754 | off += len; | |
755 | if (off == totlen) { | |
3fa8d9bb | 756 | cp = ecbuf + ECRDOFF + sizeof (struct ether_header); |
48db90de SL |
757 | off = 0; |
758 | totlen = off0; | |
759 | } | |
75334b2a BF |
760 | } |
761 | return (top); | |
762 | bad: | |
763 | m_freem(top); | |
764 | return (0); | |
765 | } | |
1cd789fb SL |
766 | |
767 | /* | |
768 | * Process an ioctl request. | |
769 | */ | |
770 | ecioctl(ifp, cmd, data) | |
771 | register struct ifnet *ifp; | |
772 | int cmd; | |
773 | caddr_t data; | |
774 | { | |
775 | register struct ifreq *ifr = (struct ifreq *)data; | |
1cd789fb SL |
776 | int s = splimp(), error = 0; |
777 | ||
778 | switch (cmd) { | |
779 | ||
780 | case SIOCSIFADDR: | |
781 | if (ifp->if_flags & IFF_RUNNING) | |
782 | if_rtinit(ifp, -1); /* delete previous route */ | |
17718098 | 783 | ecsetaddr(ifp, (struct sockaddr_in *)&ifr->ifr_addr); |
1cd789fb SL |
784 | ecinit(ifp->if_unit); |
785 | break; | |
786 | ||
787 | default: | |
788 | error = EINVAL; | |
789 | } | |
790 | splx(s); | |
791 | return (error); | |
792 | } | |
17718098 SL |
793 | |
794 | ecsetaddr(ifp, sin) | |
795 | register struct ifnet *ifp; | |
796 | register struct sockaddr_in *sin; | |
797 | { | |
798 | ||
799 | ifp->if_addr = *(struct sockaddr *)sin; | |
800 | ifp->if_net = in_netof(sin->sin_addr); | |
801 | ifp->if_host[0] = in_lnaof(sin->sin_addr); | |
802 | sin = (struct sockaddr_in *)&ifp->if_broadaddr; | |
803 | sin->sin_family = AF_INET; | |
804 | sin->sin_addr = if_makeaddr(ifp->if_net, INADDR_ANY); | |
805 | ifp->if_flags |= IFF_BROADCAST; | |
806 | } |