Commit | Line | Data |
---|---|---|
b1b3e868 | 1 | /* if_ec.c 6.8 85/05/04 */ |
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" | |
7f0e1e06 | 25 | #include "../netinet/in_var.h" |
d2cc167c BJ |
26 | #include "../netinet/ip.h" |
27 | #include "../netinet/ip_var.h" | |
8ae4cebd | 28 | #include "../netinet/if_ether.h" |
b1b3e868 | 29 | #ifdef PUP |
d2cc167c | 30 | #include "../netpup/pup.h" |
b1b3e868 | 31 | #endif |
a9687d27 BJ |
32 | |
33 | #include "../vax/cpu.h" | |
34 | #include "../vax/mtpr.h" | |
a6e960e7 JB |
35 | #include "if_ecreg.h" |
36 | #include "if_uba.h" | |
a9687d27 BJ |
37 | #include "../vaxuba/ubareg.h" |
38 | #include "../vaxuba/ubavar.h" | |
75334b2a | 39 | |
b6220e6c MK |
40 | #if CLSIZE == 2 |
41 | #define ECBUFSIZE 32 /* on-board memory, clusters */ | |
3f506470 | 42 | #endif |
3f506470 | 43 | |
b6220e6c | 44 | int ecubamem(), ecprobe(), ecattach(), ecrint(), ecxint(), eccollide(); |
75334b2a BF |
45 | struct uba_device *ecinfo[NEC]; |
46 | u_short ecstd[] = { 0 }; | |
47 | struct uba_driver ecdriver = | |
b6220e6c | 48 | { ecprobe, 0, ecattach, 0, ecstd, "ec", ecinfo, 0, 0, 0, ecubamem }; |
75334b2a | 49 | |
1cd789fb | 50 | int ecinit(),ecioctl(),ecoutput(),ecreset(); |
39d536e6 | 51 | struct mbuf *ecget(); |
75334b2a | 52 | |
be515f6e BF |
53 | extern struct ifnet loif; |
54 | ||
75334b2a BF |
55 | /* |
56 | * Ethernet software status per interface. | |
57 | * | |
58 | * Each interface is referenced by a network interface structure, | |
59 | * es_if, which the routing code uses to locate the interface. | |
60 | * This structure contains the output queue for the interface, its address, ... | |
61 | * We also have, for each interface, a UBA interface structure, which | |
62 | * contains information about the UNIBUS resources held by the interface: | |
63 | * map registers, buffered data paths, etc. Information is cached in this | |
64 | * structure for use by the if_uba.c routines in running the interface | |
65 | * efficiently. | |
66 | */ | |
67 | struct ec_softc { | |
8ae4cebd SL |
68 | struct arpcom es_ac; /* common Ethernet structures */ |
69 | #define es_if es_ac.ac_if /* network-visible interface */ | |
70 | #define es_addr es_ac.ac_enaddr /* hardware Ethernet address */ | |
75334b2a | 71 | struct ifuba es_ifuba; /* UNIBUS resources */ |
75334b2a | 72 | short es_mask; /* mask for current output delay */ |
75334b2a | 73 | short es_oactive; /* is output active? */ |
39d536e6 | 74 | u_char *es_buf[16]; /* virtual addresses of buffers */ |
75334b2a BF |
75 | } ec_softc[NEC]; |
76 | ||
77 | /* | |
b6220e6c MK |
78 | * Configure on-board memory for an interface. |
79 | * Called from autoconfig and after a uba reset. | |
80 | * The address of the memory on the uba is supplied in the device flags. | |
75334b2a | 81 | */ |
b6220e6c MK |
82 | ecubamem(ui, uban) |
83 | register struct uba_device *ui; | |
75334b2a | 84 | { |
b6220e6c MK |
85 | register caddr_t ecbuf = (caddr_t) &umem[uban][ui->ui_flags]; |
86 | register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; | |
75334b2a | 87 | |
b6220e6c MK |
88 | /* |
89 | * Make sure csr is there (we run before ecprobe). | |
90 | */ | |
91 | if (badaddr((caddr_t)addr, 2)) | |
92 | return (-1); | |
93 | #if VAX780 | |
94 | if (cpu == VAX_780 && uba_hd[uban].uh_uba->uba_sr) { | |
95 | uba_hd[uban].uh_uba->uba_sr = uba_hd[uban].uh_uba->uba_sr; | |
96 | return (-1); | |
97 | } | |
75334b2a | 98 | #endif |
f5a616ae BF |
99 | /* |
100 | * Make sure memory is turned on | |
101 | */ | |
102 | addr->ec_rcr = EC_AROM; | |
a26646de | 103 | /* |
b6220e6c MK |
104 | * Tell the system that the board has memory here, so it won't |
105 | * attempt to allocate the addresses later. | |
a26646de | 106 | */ |
b6220e6c MK |
107 | if (ubamem(uban, ui->ui_flags, ECBUFSIZE*CLSIZE, 1) == 0) { |
108 | printf("ec%d: cannot reserve uba addresses\n", ui->ui_unit); | |
109 | addr->ec_rcr = EC_MDISAB; /* disable memory */ | |
110 | return (-1); | |
111 | } | |
75334b2a BF |
112 | /* |
113 | * Check for existence of buffers on Unibus. | |
75334b2a | 114 | */ |
39d536e6 | 115 | if (badaddr((caddr_t)ecbuf, 2)) { |
b6220e6c MK |
116 | bad: |
117 | printf("ec%d: buffer mem not found\n", ui->ui_unit); | |
118 | (void) ubamem(uban, ui->ui_flags, ECBUFSIZE*2, 0); | |
a26646de | 119 | addr->ec_rcr = EC_MDISAB; /* disable memory */ |
b6220e6c | 120 | return (-1); |
75334b2a | 121 | } |
a26646de | 122 | #if VAX780 |
b6220e6c MK |
123 | if (cpu == VAX_780 && uba_hd[uban].uh_uba->uba_sr) { |
124 | uba_hd[uban].uh_uba->uba_sr = uba_hd[uban].uh_uba->uba_sr; | |
125 | goto bad; | |
a26646de BF |
126 | } |
127 | #endif | |
b6220e6c MK |
128 | if (ui->ui_alive == 0) /* Only printf from autoconfig */ |
129 | printf("ec%d: mem %x-%x\n", ui->ui_unit, | |
130 | ui->ui_flags, ui->ui_flags + ECBUFSIZE*CLBYTES - 1); | |
131 | ui->ui_type = 1; /* Memory on, allocated */ | |
132 | return (0); | |
133 | } | |
134 | ||
135 | /* | |
136 | * Do output DMA to determine interface presence and | |
137 | * interrupt vector. DMA is too short to disturb other hosts. | |
138 | */ | |
139 | ecprobe(reg, ui) | |
140 | caddr_t reg; | |
141 | struct uba_device *ui; | |
142 | { | |
143 | register int br, cvec; /* r11, r10 value-result */ | |
144 | register struct ecdevice *addr = (struct ecdevice *)reg; | |
145 | register caddr_t ecbuf = (caddr_t) &umem[ui->ui_ubanum][ui->ui_flags]; | |
146 | ||
147 | #ifdef lint | |
148 | br = 0; cvec = br; br = cvec; | |
149 | ecrint(0); ecxint(0); eccollide(0); | |
150 | #endif | |
75334b2a BF |
151 | |
152 | /* | |
b6220e6c | 153 | * Check that buffer memory was found and enabled. |
75334b2a | 154 | */ |
b6220e6c MK |
155 | if (ui->ui_type == 0) |
156 | return(0); | |
75334b2a BF |
157 | /* |
158 | * Make a one byte packet in what should be buffer #0. | |
b6220e6c | 159 | * Submit it for sending. This should cause an xmit interrupt. |
75334b2a BF |
160 | * The xmit interrupt vector is 8 bytes after the receive vector, |
161 | * so adjust for this before returning. | |
162 | */ | |
163 | *(u_short *)ecbuf = (u_short) 03777; | |
164 | ecbuf[03777] = '\0'; | |
165 | addr->ec_xcr = EC_XINTEN|EC_XWBN; | |
166 | DELAY(100000); | |
167 | addr->ec_xcr = EC_XCLR; | |
0ca845ca | 168 | if (cvec > 0 && cvec != 0x200) { |
a26646de BF |
169 | if (cvec & 04) { /* collision interrupt */ |
170 | cvec -= 04; | |
171 | br += 1; /* rcv is collision + 1 */ | |
172 | } else { /* xmit interrupt */ | |
173 | cvec -= 010; | |
174 | br += 2; /* rcv is xmit + 2 */ | |
175 | } | |
0ca845ca | 176 | } |
75334b2a BF |
177 | return (1); |
178 | } | |
179 | ||
180 | /* | |
181 | * Interface exists: make available by filling in network interface | |
182 | * record. System will initialize the interface when it is ready | |
183 | * to accept packets. | |
184 | */ | |
185 | ecattach(ui) | |
186 | struct uba_device *ui; | |
187 | { | |
0ca845ca SL |
188 | struct ec_softc *es = &ec_softc[ui->ui_unit]; |
189 | register struct ifnet *ifp = &es->es_if; | |
75334b2a | 190 | register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; |
0ca845ca SL |
191 | int i, j; |
192 | u_char *cp; | |
75334b2a | 193 | |
0ca845ca SL |
194 | ifp->if_unit = ui->ui_unit; |
195 | ifp->if_name = "ec"; | |
3fa8d9bb | 196 | ifp->if_mtu = ETHERMTU; |
75334b2a BF |
197 | |
198 | /* | |
0ca845ca | 199 | * Read the ethernet address off the board, one nibble at a time. |
75334b2a BF |
200 | */ |
201 | addr->ec_xcr = EC_UECLR; | |
202 | addr->ec_rcr = EC_AROM; | |
7f0e1e06 | 203 | cp = es->es_addr; |
0ca845ca | 204 | #define NEXTBIT addr->ec_rcr = EC_AROM|EC_ASTEP; addr->ec_rcr = EC_AROM |
0217ce84 | 205 | for (i=0; i < sizeof (es->es_addr); i++) { |
75334b2a BF |
206 | *cp = 0; |
207 | for (j=0; j<=4; j+=4) { | |
208 | *cp |= ((addr->ec_rcr >> 8) & 0xf) << j; | |
0ca845ca | 209 | NEXTBIT; NEXTBIT; NEXTBIT; NEXTBIT; |
75334b2a BF |
210 | } |
211 | cp++; | |
212 | } | |
0ca845ca | 213 | ifp->if_init = ecinit; |
1cd789fb | 214 | ifp->if_ioctl = ecioctl; |
0ca845ca | 215 | ifp->if_output = ecoutput; |
51595ca2 | 216 | ifp->if_reset = ecreset; |
7f0e1e06 | 217 | ifp->if_flags = IFF_BROADCAST; |
75334b2a | 218 | for (i=0; i<16; i++) |
3f506470 | 219 | es->es_buf[i] |
b6220e6c | 220 | = (u_char *)&umem[ui->ui_ubanum][ui->ui_flags + 2048*i]; |
0ca845ca | 221 | if_attach(ifp); |
75334b2a BF |
222 | } |
223 | ||
224 | /* | |
225 | * Reset of interface after UNIBUS reset. | |
226 | * If interface is on specified uba, reset its state. | |
227 | */ | |
228 | ecreset(unit, uban) | |
229 | int unit, uban; | |
230 | { | |
231 | register struct uba_device *ui; | |
75334b2a BF |
232 | |
233 | if (unit >= NEC || (ui = ecinfo[unit]) == 0 || ui->ui_alive == 0 || | |
234 | ui->ui_ubanum != uban) | |
235 | return; | |
236 | printf(" ec%d", unit); | |
ce3f80e9 | 237 | ec_softc[unit].es_if.if_flags &= ~IFF_RUNNING; |
75334b2a BF |
238 | ecinit(unit); |
239 | } | |
240 | ||
241 | /* | |
242 | * Initialization of interface; clear recorded pending | |
243 | * operations, and reinitialize UNIBUS usage. | |
244 | */ | |
245 | ecinit(unit) | |
246 | int unit; | |
247 | { | |
0ca845ca SL |
248 | struct ec_softc *es = &ec_softc[unit]; |
249 | struct ecdevice *addr; | |
8ae4cebd | 250 | register struct ifnet *ifp = &es->es_if; |
1cd789fb | 251 | int i, s; |
8ae4cebd | 252 | |
7f0e1e06 MK |
253 | /* not yet, if address still unknown */ |
254 | if (ifp->if_addrlist == (struct ifaddr *)0) | |
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 | */ |
7f0e1e06 | 262 | if ((ifp->if_flags & IFF_RUNNING) == 0) { |
1cd789fb SL |
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; | |
7f0e1e06 | 269 | es->es_if.if_flags |= IFF_RUNNING; |
1cd789fb SL |
270 | if (es->es_if.if_snd.ifq_head) |
271 | ecstart(unit); | |
272 | splx(s); | |
273 | } | |
75334b2a BF |
274 | } |
275 | ||
75334b2a BF |
276 | /* |
277 | * Start or restart output on interface. | |
278 | * If interface is already active, then this is a retransmit | |
be515f6e | 279 | * after a collision, and just restuff registers. |
75334b2a BF |
280 | * If interface is not already active, get another datagram |
281 | * to send off of the interface queue, and map it to the interface | |
282 | * before starting the output. | |
283 | */ | |
b6220e6c | 284 | ecstart(unit) |
75334b2a | 285 | { |
0ca845ca SL |
286 | struct ec_softc *es = &ec_softc[unit]; |
287 | struct ecdevice *addr; | |
75334b2a | 288 | struct mbuf *m; |
75334b2a BF |
289 | |
290 | if (es->es_oactive) | |
291 | goto restart; | |
292 | ||
75334b2a BF |
293 | IF_DEQUEUE(&es->es_if.if_snd, m); |
294 | if (m == 0) { | |
295 | es->es_oactive = 0; | |
296 | return; | |
297 | } | |
75334b2a BF |
298 | ecput(es->es_buf[ECTBF], m); |
299 | ||
75334b2a | 300 | restart: |
0ca845ca | 301 | addr = (struct ecdevice *)ecinfo[unit]->ui_addr; |
75334b2a BF |
302 | addr->ec_xcr = EC_WRITE|ECTBF; |
303 | es->es_oactive = 1; | |
304 | } | |
305 | ||
306 | /* | |
307 | * Ethernet interface transmitter interrupt. | |
308 | * Start another output if more data to send. | |
309 | */ | |
310 | ecxint(unit) | |
311 | int unit; | |
312 | { | |
75334b2a | 313 | register struct ec_softc *es = &ec_softc[unit]; |
0ca845ca SL |
314 | register struct ecdevice *addr = |
315 | (struct ecdevice *)ecinfo[unit]->ui_addr; | |
75334b2a BF |
316 | |
317 | if (es->es_oactive == 0) | |
318 | return; | |
0ca845ca SL |
319 | if ((addr->ec_xcr&EC_XDONE) == 0 || (addr->ec_xcr&EC_XBN) != ECTBF) { |
320 | printf("ec%d: stray xmit interrupt, xcr=%b\n", unit, | |
321 | addr->ec_xcr, EC_XBITS); | |
322 | es->es_oactive = 0; | |
323 | addr->ec_xcr = EC_XCLR; | |
324 | return; | |
325 | } | |
75334b2a BF |
326 | es->es_if.if_opackets++; |
327 | es->es_oactive = 0; | |
75334b2a BF |
328 | es->es_mask = ~0; |
329 | addr->ec_xcr = EC_XCLR; | |
0ca845ca SL |
330 | if (es->es_if.if_snd.ifq_head) |
331 | ecstart(unit); | |
75334b2a BF |
332 | } |
333 | ||
334 | /* | |
335 | * Collision on ethernet interface. Do exponential | |
336 | * backoff, and retransmit. If have backed off all | |
337 | * the way print warning diagnostic, and drop packet. | |
338 | */ | |
339 | eccollide(unit) | |
340 | int unit; | |
341 | { | |
342 | struct ec_softc *es = &ec_softc[unit]; | |
75334b2a | 343 | |
75334b2a | 344 | es->es_if.if_collisions++; |
0ca845ca SL |
345 | if (es->es_oactive) |
346 | ecdocoll(unit); | |
75334b2a BF |
347 | } |
348 | ||
349 | ecdocoll(unit) | |
350 | int unit; | |
351 | { | |
352 | register struct ec_softc *es = &ec_softc[unit]; | |
be515f6e BF |
353 | register struct ecdevice *addr = |
354 | (struct ecdevice *)ecinfo[unit]->ui_addr; | |
355 | register i; | |
356 | int delay; | |
75334b2a BF |
357 | |
358 | /* | |
359 | * Es_mask is a 16 bit number with n low zero bits, with | |
360 | * n the number of backoffs. When es_mask is 0 we have | |
361 | * backed off 16 times, and give up. | |
362 | */ | |
363 | if (es->es_mask == 0) { | |
be515f6e | 364 | es->es_if.if_oerrors++; |
75334b2a BF |
365 | printf("ec%d: send error\n", unit); |
366 | /* | |
be515f6e BF |
367 | * Reset interface, then requeue rcv buffers. |
368 | * Some incoming packets may be lost, but that | |
369 | * can't be helped. | |
370 | */ | |
371 | addr->ec_xcr = EC_UECLR; | |
372 | for (i=ECRHBF; i>=ECRLBF; i--) | |
373 | addr->ec_rcr = EC_READ|i; | |
374 | /* | |
375 | * Reset and transmit next packet (if any). | |
75334b2a | 376 | */ |
be515f6e BF |
377 | es->es_oactive = 0; |
378 | es->es_mask = ~0; | |
379 | if (es->es_if.if_snd.ifq_head) | |
380 | ecstart(unit); | |
75334b2a BF |
381 | return; |
382 | } | |
383 | /* | |
be515f6e BF |
384 | * Do exponential backoff. Compute delay based on low bits |
385 | * of the interval timer. Then delay for that number of | |
386 | * slot times. A slot time is 51.2 microseconds (rounded to 51). | |
387 | * This does not take into account the time already used to | |
388 | * process the interrupt. | |
75334b2a BF |
389 | */ |
390 | es->es_mask <<= 1; | |
be515f6e BF |
391 | delay = mfpr(ICR) &~ es->es_mask; |
392 | DELAY(delay * 51); | |
75334b2a | 393 | /* |
be515f6e | 394 | * Clear the controller's collision flag, thus enabling retransmit. |
75334b2a | 395 | */ |
a26646de | 396 | addr->ec_xcr = EC_CLEAR; |
75334b2a BF |
397 | } |
398 | ||
75334b2a BF |
399 | /* |
400 | * Ethernet interface receiver interrupt. | |
401 | * If input error just drop packet. | |
402 | * Otherwise purge input buffered data path and examine | |
403 | * packet to determine type. If can't determine length | |
404 | * from type, then have to drop packet. Othewise decapsulate | |
405 | * packet based on type and pass to type specific higher-level | |
406 | * input routine. | |
407 | */ | |
408 | ecrint(unit) | |
409 | int unit; | |
410 | { | |
411 | struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr; | |
75334b2a | 412 | |
75334b2a BF |
413 | while (addr->ec_rcr & EC_RDONE) |
414 | ecread(unit); | |
415 | } | |
416 | ||
417 | ecread(unit) | |
418 | int unit; | |
419 | { | |
420 | register struct ec_softc *es = &ec_softc[unit]; | |
421 | struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr; | |
3fa8d9bb | 422 | register struct ether_header *ec; |
75334b2a | 423 | struct mbuf *m; |
39d536e6 | 424 | int len, off, resid, ecoff, rbuf; |
75334b2a | 425 | register struct ifqueue *inq; |
39d536e6 | 426 | u_char *ecbuf; |
75334b2a BF |
427 | |
428 | es->es_if.if_ipackets++; | |
39d536e6 BJ |
429 | rbuf = addr->ec_rcr & EC_RBN; |
430 | if (rbuf < ECRLBF || rbuf > ECRHBF) | |
75334b2a | 431 | panic("ecrint"); |
39d536e6 | 432 | ecbuf = es->es_buf[rbuf]; |
75334b2a | 433 | ecoff = *(short *)ecbuf; |
be515f6e | 434 | if (ecoff <= ECRDOFF || ecoff > 2046) { |
75334b2a BF |
435 | es->es_if.if_ierrors++; |
436 | #ifdef notdef | |
437 | if (es->es_if.if_ierrors % 100 == 0) | |
438 | printf("ec%d: += 100 input errors\n", unit); | |
439 | #endif | |
75334b2a BF |
440 | goto setup; |
441 | } | |
442 | ||
443 | /* | |
444 | * Get input data length. | |
445 | * Get pointer to ethernet header (in input buffer). | |
7f0e1e06 | 446 | * Deal with trailer protocol: if type is trailer type |
75334b2a BF |
447 | * get true type from first 16-bit word past data. |
448 | * Remember that type was trailer by setting off. | |
449 | */ | |
3fa8d9bb SL |
450 | len = ecoff - ECRDOFF - sizeof (struct ether_header); |
451 | ec = (struct ether_header *)(ecbuf + ECRDOFF); | |
452 | ec->ether_type = ntohs((u_short)ec->ether_type); | |
75334b2a | 453 | #define ecdataaddr(ec, off, type) ((type)(((caddr_t)((ec)+1)+(off)))) |
7f0e1e06 MK |
454 | if (ec->ether_type >= ETHERTYPE_TRAIL && |
455 | ec->ether_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { | |
456 | off = (ec->ether_type - ETHERTYPE_TRAIL) * 512; | |
3fa8d9bb | 457 | if (off >= ETHERMTU) |
75334b2a | 458 | goto setup; /* sanity */ |
3fa8d9bb SL |
459 | ec->ether_type = ntohs(*ecdataaddr(ec, off, u_short *)); |
460 | resid = ntohs(*(ecdataaddr(ec, off+2, u_short *))); | |
75334b2a BF |
461 | if (off + resid > len) |
462 | goto setup; /* sanity */ | |
463 | len = off + resid; | |
464 | } else | |
465 | off = 0; | |
466 | if (len == 0) | |
467 | goto setup; | |
468 | ||
469 | /* | |
470 | * Pull packet off interface. Off is nonzero if packet | |
471 | * has trailing header; ecget will then force this header | |
472 | * information to be at the front, but we still have to drop | |
473 | * the type and length which are at the front of any trailer data. | |
474 | */ | |
475 | m = ecget(ecbuf, len, off); | |
476 | if (m == 0) | |
477 | goto setup; | |
478 | if (off) { | |
479 | m->m_off += 2 * sizeof (u_short); | |
480 | m->m_len -= 2 * sizeof (u_short); | |
481 | } | |
3fa8d9bb | 482 | switch (ec->ether_type) { |
75334b2a BF |
483 | |
484 | #ifdef INET | |
7f0e1e06 | 485 | case ETHERTYPE_IP: |
75334b2a BF |
486 | schednetisr(NETISR_IP); |
487 | inq = &ipintrq; | |
488 | break; | |
8ae4cebd | 489 | |
7f0e1e06 | 490 | case ETHERTYPE_ARP: |
8ae4cebd | 491 | arpinput(&es->es_ac, m); |
27bcf34c | 492 | goto setup; |
75334b2a BF |
493 | #endif |
494 | default: | |
495 | m_freem(m); | |
496 | goto setup; | |
497 | } | |
498 | ||
499 | if (IF_QFULL(inq)) { | |
500 | IF_DROP(inq); | |
501 | m_freem(m); | |
0ca845ca SL |
502 | goto setup; |
503 | } | |
504 | IF_ENQUEUE(inq, m); | |
75334b2a BF |
505 | |
506 | setup: | |
507 | /* | |
508 | * Reset for next packet. | |
509 | */ | |
39d536e6 | 510 | addr->ec_rcr = EC_READ|EC_RCLR|rbuf; |
75334b2a BF |
511 | } |
512 | ||
513 | /* | |
514 | * Ethernet output routine. | |
515 | * Encapsulate a packet of type family for the local net. | |
516 | * Use trailer local net encapsulation if enough data in first | |
517 | * packet leaves a multiple of 512 bytes of data in remainder. | |
be515f6e BF |
518 | * If destination is this address or broadcast, send packet to |
519 | * loop device to kludge around the fact that 3com interfaces can't | |
520 | * talk to themselves. | |
75334b2a BF |
521 | */ |
522 | ecoutput(ifp, m0, dst) | |
523 | struct ifnet *ifp; | |
524 | struct mbuf *m0; | |
525 | struct sockaddr *dst; | |
526 | { | |
8ae4cebd | 527 | int type, s, error; |
7f0e1e06 | 528 | u_char edst[6]; |
8ae4cebd | 529 | struct in_addr idst; |
75334b2a BF |
530 | register struct ec_softc *es = &ec_softc[ifp->if_unit]; |
531 | register struct mbuf *m = m0; | |
3fa8d9bb | 532 | register struct ether_header *ec; |
66923854 | 533 | register int off; |
8ae4cebd | 534 | struct mbuf *mcopy = (struct mbuf *)0; |
75334b2a | 535 | |
75334b2a BF |
536 | switch (dst->sa_family) { |
537 | ||
538 | #ifdef INET | |
539 | case AF_INET: | |
8ae4cebd | 540 | idst = ((struct sockaddr_in *)dst)->sin_addr; |
7f0e1e06 | 541 | if (!arpresolve(&es->es_ac, m, &idst, edst)) |
8ae4cebd | 542 | return (0); /* if not yet resolved */ |
7f0e1e06 MK |
543 | if (!bcmp((caddr_t)edst, (caddr_t)etherbroadcastaddr, |
544 | sizeof(edst))) | |
92aca3da | 545 | mcopy = m_copy(m, 0, (int)M_COPYALL); |
75334b2a | 546 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; |
1cd789fb SL |
547 | /* need per host negotiation */ |
548 | if ((ifp->if_flags & IFF_NOTRAILERS) == 0) | |
75334b2a BF |
549 | if (off > 0 && (off & 0x1ff) == 0 && |
550 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { | |
7f0e1e06 | 551 | type = ETHERTYPE_TRAIL + (off>>9); |
75334b2a BF |
552 | m->m_off -= 2 * sizeof (u_short); |
553 | m->m_len += 2 * sizeof (u_short); | |
7f0e1e06 | 554 | *mtod(m, u_short *) = ntohs((u_short)ETHERTYPE_IP); |
3fa8d9bb | 555 | *(mtod(m, u_short *) + 1) = ntohs((u_short)m->m_len); |
75334b2a BF |
556 | goto gottrailertype; |
557 | } | |
7f0e1e06 | 558 | type = ETHERTYPE_IP; |
75334b2a BF |
559 | off = 0; |
560 | goto gottype; | |
75334b2a BF |
561 | #endif |
562 | ||
8ae4cebd SL |
563 | case AF_UNSPEC: |
564 | ec = (struct ether_header *)dst->sa_data; | |
7f0e1e06 | 565 | bcopy((caddr_t)ec->ether_dhost, (caddr_t)edst, sizeof (edst)); |
8ae4cebd SL |
566 | type = ec->ether_type; |
567 | goto gottype; | |
568 | ||
75334b2a BF |
569 | default: |
570 | printf("ec%d: can't handle af%d\n", ifp->if_unit, | |
571 | dst->sa_family); | |
572 | error = EAFNOSUPPORT; | |
573 | goto bad; | |
574 | } | |
575 | ||
576 | gottrailertype: | |
577 | /* | |
578 | * Packet to be sent as trailer: move first packet | |
579 | * (control information) to end of chain. | |
580 | */ | |
581 | while (m->m_next) | |
582 | m = m->m_next; | |
583 | m->m_next = m0; | |
584 | m = m0->m_next; | |
585 | m0->m_next = 0; | |
586 | m0 = m; | |
587 | ||
588 | gottype: | |
589 | /* | |
590 | * Add local net header. If no space in first mbuf, | |
591 | * allocate another. | |
592 | */ | |
593 | if (m->m_off > MMAXOFF || | |
3fa8d9bb | 594 | MMINOFF + sizeof (struct ether_header) > m->m_off) { |
cce93e4b | 595 | m = m_get(M_DONTWAIT, MT_HEADER); |
75334b2a BF |
596 | if (m == 0) { |
597 | error = ENOBUFS; | |
598 | goto bad; | |
599 | } | |
600 | m->m_next = m0; | |
601 | m->m_off = MMINOFF; | |
3fa8d9bb | 602 | m->m_len = sizeof (struct ether_header); |
75334b2a | 603 | } else { |
3fa8d9bb SL |
604 | m->m_off -= sizeof (struct ether_header); |
605 | m->m_len += sizeof (struct ether_header); | |
75334b2a | 606 | } |
3fa8d9bb | 607 | ec = mtod(m, struct ether_header *); |
7f0e1e06 MK |
608 | bcopy((caddr_t)edst, (caddr_t)ec->ether_dhost, sizeof (edst)); |
609 | bcopy((caddr_t)es->es_addr, (caddr_t)ec->ether_shost, | |
610 | sizeof(ec->ether_shost)); | |
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 | { | |
7f0e1e06 | 775 | register struct ifaddr *ifa = (struct ifaddr *)data; |
1cd789fb SL |
776 | int s = splimp(), error = 0; |
777 | ||
778 | switch (cmd) { | |
779 | ||
780 | case SIOCSIFADDR: | |
7f0e1e06 | 781 | ifp->if_flags |= IFF_UP; |
1cd789fb | 782 | ecinit(ifp->if_unit); |
7f0e1e06 MK |
783 | |
784 | switch (ifa->ifa_addr.sa_family) { | |
785 | case AF_INET: | |
786 | ((struct arpcom *)ifp)->ac_ipaddr = | |
787 | IA_SIN(ifa)->sin_addr; | |
788 | arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr); | |
789 | break; | |
790 | } | |
1cd789fb SL |
791 | break; |
792 | ||
793 | default: | |
794 | error = EINVAL; | |
795 | } | |
796 | splx(s); | |
797 | return (error); | |
798 | } |