Commit | Line | Data |
---|---|---|
4c1d8db0 | 1 | /* if_dmc.c 4.23 83/02/20 */ |
63665984 BJ |
2 | |
3 | #include "dmc.h" | |
4 | #if NDMC > 0 | |
5 | #define printd if(dmcdebug)printf | |
4c1d8db0 | 6 | int dmcdebug = 0; |
63665984 BJ |
7 | /* |
8 | * DMC11 device driver, internet version | |
9 | * | |
10 | * TODO | |
11 | * allow more than one outstanding read or write. | |
12 | */ | |
961945a8 | 13 | #include "../machine/pte.h" |
63665984 BJ |
14 | |
15 | #include "../h/param.h" | |
16 | #include "../h/systm.h" | |
17 | #include "../h/mbuf.h" | |
63665984 BJ |
18 | #include "../h/buf.h" |
19 | #include "../h/tty.h" | |
20 | #include "../h/protosw.h" | |
21 | #include "../h/socket.h" | |
63665984 | 22 | #include "../h/vmmac.h" |
a9687d27 BJ |
23 | #include <errno.h> |
24 | ||
25 | #include "../net/if.h" | |
4fce3bf9 | 26 | #include "../net/netisr.h" |
a9687d27 | 27 | #include "../net/route.h" |
d2cc167c BJ |
28 | #include "../netinet/in.h" |
29 | #include "../netinet/in_systm.h" | |
a9687d27 BJ |
30 | |
31 | #include "../vax/cpu.h" | |
32 | #include "../vax/mtpr.h" | |
d2cc167c BJ |
33 | #include "../vaxif/if_uba.h" |
34 | #include "../vaxif/if_dmc.h" | |
a9687d27 BJ |
35 | #include "../vaxuba/ubareg.h" |
36 | #include "../vaxuba/ubavar.h" | |
63665984 | 37 | |
4c1d8db0 SL |
38 | #ifndef DMC_USEMAINT |
39 | #define DMC_USEMAINT 1 /* use maintenance mode */ | |
40 | #endif | |
41 | ||
63665984 BJ |
42 | /* |
43 | * Driver information for auto-configuration stuff. | |
44 | */ | |
45 | int dmcprobe(), dmcattach(), dmcinit(), dmcoutput(), dmcreset(); | |
46 | struct uba_device *dmcinfo[NDMC]; | |
47 | u_short dmcstd[] = { 0 }; | |
48 | struct uba_driver dmcdriver = | |
49 | { dmcprobe, 0, dmcattach, 0, dmcstd, "dmc", dmcinfo }; | |
50 | ||
ee787340 | 51 | #define DMC_AF 0xff /* 8 bits of address type in ui_flags */ |
6187f8f4 | 52 | #define DMC_NET 0xffffff00 /* 24 bits of net number in ui_flags */ |
63665984 BJ |
53 | |
54 | /* | |
55 | * DMC software status per interface. | |
56 | * | |
57 | * Each interface is referenced by a network interface structure, | |
58 | * sc_if, which the routing code uses to locate the interface. | |
59 | * This structure contains the output queue for the interface, its address, ... | |
60 | * We also have, for each interface, a UBA interface structure, which | |
61 | * contains information about the UNIBUS resources held by the interface: | |
62 | * map registers, buffered data paths, etc. Information is cached in this | |
63 | * structure for use by the if_uba.c routines in running the interface | |
64 | * efficiently. | |
65 | */ | |
66 | struct dmc_softc { | |
67 | struct ifnet sc_if; /* network-visible interface */ | |
68 | struct ifuba sc_ifuba; /* UNIBUS resources */ | |
69 | short sc_flag; /* flags */ | |
70 | short sc_oactive; /* output active */ | |
71 | int sc_ubinfo; /* UBA mapping info for base table */ | |
72 | struct clist sc_que; /* command queue */ | |
73 | } dmc_softc[NDMC]; | |
74 | ||
75 | /* flags */ | |
76 | #define DMCRUN 01 | |
77 | #define DMCBMAPPED 02 /* base table mapped */ | |
78 | ||
79 | struct dmc_base { | |
80 | short d_base[128]; /* DMC base table */ | |
81 | } dmc_base[NDMC]; | |
82 | ||
83 | #define loword(x) ((short *)&x)[0] | |
84 | #define hiword(x) ((short *)&x)[1] | |
85 | ||
86 | dmcprobe(reg) | |
87 | caddr_t reg; | |
88 | { | |
89 | register int br, cvec; | |
90 | register struct dmcdevice *addr = (struct dmcdevice *)reg; | |
91 | register int i; | |
92 | ||
93 | #ifdef lint | |
94 | br = 0; cvec = br; br = cvec; | |
95 | dmcrint(0); dmcxint(0); | |
96 | #endif | |
97 | addr->bsel1 = DMC_MCLR; | |
98 | for (i = 100000; i && (addr->bsel1 & DMC_RUN) == 0; i--) | |
99 | ; | |
100 | if ((addr->bsel1 & DMC_RUN) == 0) | |
ee787340 | 101 | return (0); |
63665984 BJ |
102 | addr->bsel1 &= ~DMC_MCLR; |
103 | addr->bsel0 = DMC_RQI|DMC_IEI; | |
104 | DELAY(100000); | |
105 | addr->bsel1 = DMC_MCLR; | |
106 | for (i = 100000; i && (addr->bsel1 & DMC_RUN) == 0; i--) | |
107 | ; | |
7d6f1cd5 SL |
108 | #ifdef ECHACK |
109 | br = 0x16; | |
110 | #endif | |
ee787340 | 111 | return (1); |
63665984 BJ |
112 | } |
113 | ||
114 | /* | |
115 | * Interface exists: make available by filling in network interface | |
116 | * record. System will initialize the interface when it is ready | |
117 | * to accept packets. | |
118 | */ | |
119 | dmcattach(ui) | |
120 | register struct uba_device *ui; | |
121 | { | |
122 | register struct dmc_softc *sc = &dmc_softc[ui->ui_unit]; | |
ee787340 | 123 | register struct sockaddr_in *sin; |
63665984 BJ |
124 | |
125 | sc->sc_if.if_unit = ui->ui_unit; | |
126 | sc->sc_if.if_name = "dmc"; | |
127 | sc->sc_if.if_mtu = DMCMTU; | |
128 | sc->sc_if.if_net = (ui->ui_flags & DMC_NET) >> 8; | |
129 | sc->sc_if.if_host[0] = 17; /* random number */ | |
ee787340 | 130 | sin = (struct sockaddr_in *)&sc->sc_if.if_addr; |
bfa2d860 | 131 | sin->sin_family = AF_INET; |
ee787340 | 132 | sin->sin_addr = if_makeaddr(sc->sc_if.if_net, sc->sc_if.if_host[0]); |
63665984 BJ |
133 | sc->sc_if.if_init = dmcinit; |
134 | sc->sc_if.if_output = dmcoutput; | |
51595ca2 | 135 | sc->sc_if.if_reset = dmcreset; |
bfa2d860 SL |
136 | /* DON'T KNOW IF THIS WILL WORK WITH A BDP AT HIGH SPEEDS */ |
137 | sc->sc_ifuba.ifu_flags = UBA_NEEDBDP | UBA_CANTWAIT; | |
63665984 BJ |
138 | if_attach(&sc->sc_if); |
139 | } | |
140 | ||
141 | /* | |
142 | * Reset of interface after UNIBUS reset. | |
143 | * If interface is on specified UBA, reset it's state. | |
144 | */ | |
145 | dmcreset(unit, uban) | |
146 | int unit, uban; | |
147 | { | |
148 | register struct uba_device *ui; | |
149 | ||
150 | if (unit >= NDMC || (ui = dmcinfo[unit]) == 0 || ui->ui_alive == 0 || | |
151 | ui->ui_ubanum != uban) | |
152 | return; | |
153 | printf(" dmc%d", unit); | |
154 | dmcinit(unit); | |
155 | } | |
156 | ||
157 | /* | |
158 | * Initialization of interface; reinitialize UNIBUS usage. | |
159 | */ | |
160 | dmcinit(unit) | |
161 | int unit; | |
162 | { | |
163 | register struct dmc_softc *sc = &dmc_softc[unit]; | |
164 | register struct uba_device *ui = dmcinfo[unit]; | |
165 | register struct dmcdevice *addr; | |
166 | int base; | |
167 | ||
168 | printd("dmcinit\n"); | |
169 | if ((sc->sc_flag&DMCBMAPPED) == 0) { | |
170 | sc->sc_ubinfo = uballoc(ui->ui_ubanum, | |
171 | (caddr_t)&dmc_base[unit], sizeof (struct dmc_base), 0); | |
172 | sc->sc_flag |= DMCBMAPPED; | |
173 | } | |
174 | if (if_ubainit(&sc->sc_ifuba, ui->ui_ubanum, 0, | |
b3a74b5e | 175 | (int)btoc(DMCMTU)) == 0) { |
63665984 | 176 | printf("dmc%d: can't initialize\n", unit); |
ee787340 | 177 | sc->sc_if.if_flags &= ~IFF_UP; |
63665984 BJ |
178 | return; |
179 | } | |
180 | addr = (struct dmcdevice *)ui->ui_addr; | |
181 | addr->bsel2 |= DMC_IEO; | |
182 | base = sc->sc_ubinfo & 0x3ffff; | |
183 | printd(" base 0x%x\n", base); | |
184 | dmcload(sc, DMC_BASEI, base, (base>>2)&DMC_XMEM); | |
4c1d8db0 | 185 | dmcload(sc, DMC_CNTLI, 0, DMC_USEMAINT ? DMC_MAINT : 0); |
63665984 BJ |
186 | base = sc->sc_ifuba.ifu_r.ifrw_info & 0x3ffff; |
187 | dmcload(sc, DMC_READ, base, ((base>>2)&DMC_XMEM)|DMCMTU); | |
188 | printd(" first read queued, addr 0x%x\n", base); | |
ee787340 | 189 | sc->sc_if.if_flags |= IFF_UP; |
f6311fb6 SL |
190 | /* set up routing table entry */ |
191 | if ((sc->sc_if.if_flags & IFF_ROUTE) == 0) { | |
a13c006d | 192 | rtinit(&sc->sc_if.if_addr, &sc->sc_if.if_addr, RTF_HOST|RTF_UP); |
f6311fb6 SL |
193 | sc->sc_if.if_flags |= IFF_ROUTE; |
194 | } | |
63665984 BJ |
195 | } |
196 | ||
197 | /* | |
198 | * Start output on interface. Get another datagram | |
199 | * to send from the interface queue and map it to | |
200 | * the interface before starting output. | |
201 | */ | |
202 | dmcstart(dev) | |
203 | dev_t dev; | |
204 | { | |
205 | int unit = minor(dev); | |
206 | struct uba_device *ui = dmcinfo[unit]; | |
207 | register struct dmc_softc *sc = &dmc_softc[unit]; | |
208 | int addr, len; | |
209 | struct mbuf *m; | |
210 | ||
211 | printd("dmcstart\n"); | |
212 | /* | |
213 | * Dequeue a request and map it to the UNIBUS. | |
214 | * If no more requests, just return. | |
215 | */ | |
216 | IF_DEQUEUE(&sc->sc_if.if_snd, m); | |
217 | if (m == 0) | |
218 | return; | |
219 | len = if_wubaput(&sc->sc_ifuba, m); | |
220 | ||
221 | /* | |
222 | * Have request mapped to UNIBUS for transmission. | |
223 | * Purge any stale data from this BDP and start the output. | |
224 | */ | |
bfa2d860 | 225 | if (sc->sc_ifuba.ifu_flags & UBA_NEEDBDP) |
791be395 | 226 | UBAPURGE(sc->sc_ifuba.ifu_uba, sc->sc_ifuba.ifu_w.ifrw_bdp); |
63665984 BJ |
227 | addr = sc->sc_ifuba.ifu_w.ifrw_info & 0x3ffff; |
228 | printd(" len %d, addr 0x%x, ", len, addr); | |
229 | printd("mr 0x%x\n", sc->sc_ifuba.ifu_w.ifrw_mr[0]); | |
230 | dmcload(sc, DMC_WRITE, addr, (len&DMC_CCOUNT)|((addr>>2)&DMC_XMEM)); | |
231 | sc->sc_oactive = 1; | |
232 | } | |
233 | ||
234 | /* | |
235 | * Utility routine to load the DMC device registers. | |
236 | */ | |
237 | dmcload(sc, type, w0, w1) | |
238 | register struct dmc_softc *sc; | |
239 | int type, w0, w1; | |
240 | { | |
241 | register struct dmcdevice *addr; | |
242 | register int unit, sps, n; | |
243 | ||
244 | printd("dmcload: 0x%x 0x%x 0x%x\n", type, w0, w1); | |
245 | unit = sc - dmc_softc; | |
246 | addr = (struct dmcdevice *)dmcinfo[unit]->ui_addr; | |
247 | sps = spl5(); | |
248 | if ((n = sc->sc_que.c_cc) == 0) | |
249 | addr->bsel0 = type | DMC_RQI; | |
250 | else | |
668cc26d SL |
251 | (void) putc(type | DMC_RQI, &sc->sc_que); |
252 | (void) putw(w0, &sc->sc_que); | |
253 | (void) putw(w1, &sc->sc_que); | |
63665984 BJ |
254 | if (n == 0) |
255 | dmcrint(unit); | |
256 | splx(sps); | |
257 | } | |
258 | ||
259 | /* | |
260 | * DMC interface receiver interrupt. | |
261 | * Ready to accept another command, | |
262 | * pull one off the command queue. | |
263 | */ | |
264 | dmcrint(unit) | |
265 | int unit; | |
266 | { | |
267 | register struct dmc_softc *sc; | |
268 | register struct dmcdevice *addr; | |
269 | register int n; | |
63665984 BJ |
270 | |
271 | addr = (struct dmcdevice *)dmcinfo[unit]->ui_addr; | |
272 | sc = &dmc_softc[unit]; | |
273 | while (addr->bsel0&DMC_RDYI) { | |
63665984 BJ |
274 | addr->sel4 = getw(&sc->sc_que); |
275 | addr->sel6 = getw(&sc->sc_que); | |
63665984 | 276 | addr->bsel0 &= ~(DMC_IEI|DMC_RQI); |
63665984 BJ |
277 | while (addr->bsel0&DMC_RDYI) |
278 | ; | |
279 | if (sc->sc_que.c_cc == 0) | |
4c1d8db0 | 280 | goto out; |
63665984 BJ |
281 | addr->bsel0 = getc(&sc->sc_que); |
282 | n = RDYSCAN; | |
283 | while (n-- && (addr->bsel0&DMC_RDYI) == 0) | |
284 | ; | |
285 | } | |
286 | if (sc->sc_que.c_cc) | |
287 | addr->bsel0 |= DMC_IEI; | |
4c1d8db0 SL |
288 | out: |
289 | dmxint(unit); | |
63665984 BJ |
290 | } |
291 | ||
292 | /* | |
293 | * DMC interface transmitter interrupt. | |
294 | * A transfer has completed, check for errors. | |
295 | * If it was a read, notify appropriate protocol. | |
296 | * If it was a write, pull the next one off the queue. | |
297 | */ | |
298 | dmcxint(unit) | |
299 | int unit; | |
300 | { | |
301 | register struct dmc_softc *sc; | |
302 | struct uba_device *ui = dmcinfo[unit]; | |
303 | struct dmcdevice *addr; | |
304 | struct mbuf *m; | |
305 | register struct ifqueue *inq; | |
4c1d8db0 | 306 | int arg, arg2, cmd, len; |
63665984 BJ |
307 | |
308 | addr = (struct dmcdevice *)ui->ui_addr; | |
4c1d8db0 SL |
309 | cmd = addr->bsel2 & 0xff; |
310 | if ((cmd & DMC_RDYO) == 0) | |
311 | return; | |
312 | arg2 = addr->sel4; | |
63665984 | 313 | arg = addr->sel6; |
63665984 BJ |
314 | addr->bsel2 &= ~DMC_RDYO; |
315 | sc = &dmc_softc[unit]; | |
316 | printd("dmcxint\n"); | |
4c1d8db0 | 317 | switch (cmd & 07) { |
63665984 BJ |
318 | |
319 | case DMC_OUR: | |
320 | /* | |
321 | * A read has completed. Purge input buffered | |
322 | * data path. Pass packet to type specific | |
323 | * higher-level input routine. | |
324 | */ | |
325 | sc->sc_if.if_ipackets++; | |
bfa2d860 | 326 | if (sc->sc_ifuba.ifu_flags & UBA_NEEDBDP) |
791be395 BJ |
327 | UBAPURGE(sc->sc_ifuba.ifu_uba, |
328 | sc->sc_ifuba.ifu_r.ifrw_bdp); | |
63665984 BJ |
329 | len = arg & DMC_CCOUNT; |
330 | printd(" read done, len %d\n", len); | |
ee787340 | 331 | switch (ui->ui_flags & DMC_AF) { |
63665984 | 332 | #ifdef INET |
ee787340 | 333 | case AF_INET: |
9c8692e9 | 334 | schednetisr(NETISR_IP); |
63665984 BJ |
335 | inq = &ipintrq; |
336 | break; | |
337 | #endif | |
338 | ||
339 | default: | |
ee787340 SL |
340 | printf("dmc%d: unknown address type %d\n", unit, |
341 | ui->ui_flags & DMC_AF); | |
63665984 BJ |
342 | goto setup; |
343 | } | |
344 | m = if_rubaget(&sc->sc_ifuba, len, 0); | |
345 | if (m == 0) | |
346 | goto setup; | |
1e977657 BJ |
347 | if (IF_QFULL(inq)) { |
348 | IF_DROP(inq); | |
4fce3bf9 | 349 | m_freem(m); |
1e977657 BJ |
350 | } else |
351 | IF_ENQUEUE(inq, m); | |
63665984 BJ |
352 | |
353 | setup: | |
354 | arg = sc->sc_ifuba.ifu_r.ifrw_info & 0x3ffff; | |
355 | dmcload(sc, DMC_READ, arg, ((arg >> 2) & DMC_XMEM) | DMCMTU); | |
356 | return; | |
357 | ||
358 | case DMC_OUX: | |
359 | /* | |
360 | * A write has completed, start another | |
361 | * transfer if there is more data to send. | |
362 | */ | |
363 | if (sc->sc_oactive == 0) | |
364 | return; /* SHOULD IT BE A FATAL ERROR? */ | |
365 | printd(" write done\n"); | |
366 | sc->sc_if.if_opackets++; | |
367 | sc->sc_oactive = 0; | |
368 | if (sc->sc_ifuba.ifu_xtofree) { | |
4fce3bf9 | 369 | m_freem(sc->sc_ifuba.ifu_xtofree); |
63665984 BJ |
370 | sc->sc_ifuba.ifu_xtofree = 0; |
371 | } | |
372 | if (sc->sc_if.if_snd.ifq_head == 0) | |
373 | return; | |
374 | dmcstart(unit); | |
375 | return; | |
376 | ||
377 | case DMC_CNTLO: | |
378 | arg &= DMC_CNTMASK; | |
379 | if (arg&DMC_FATAL) { | |
380 | addr->bsel1 = DMC_MCLR; | |
381 | sc->sc_flag &= ~DMCRUN; | |
382 | /*** DO SOMETHING TO RESTART DEVICE ***/ | |
383 | printf("DMC FATAL ERROR 0%o\n", arg); | |
384 | } else { | |
385 | /* ACCUMULATE STATISTICS */ | |
386 | printf("DMC SOFT ERROR 0%o\n", arg); | |
387 | } | |
388 | return; | |
389 | ||
390 | default: | |
391 | printf("dmc%d: bad control %o\n", unit, cmd); | |
392 | } | |
393 | } | |
394 | ||
395 | /* | |
396 | * DMC output routine. | |
397 | * Just send the data, header was supplied by | |
398 | * upper level protocol routines. | |
399 | */ | |
ee787340 | 400 | dmcoutput(ifp, m, dst) |
63665984 BJ |
401 | register struct ifnet *ifp; |
402 | register struct mbuf *m; | |
ee787340 | 403 | struct sockaddr *dst; |
63665984 BJ |
404 | { |
405 | struct uba_device *ui = dmcinfo[ifp->if_unit]; | |
406 | int s; | |
407 | ||
408 | printd("dmcoutput\n"); | |
ee787340 | 409 | if (dst->sa_family != (ui->ui_flags & DMC_AF)) { |
4fce3bf9 SL |
410 | printf("dmc%d: af%d not supported\n", ifp->if_unit, |
411 | dst->sa_family); | |
ee787340 | 412 | m_freem(m); |
8a2f82db | 413 | return (EAFNOSUPPORT); |
63665984 BJ |
414 | } |
415 | s = splimp(); | |
1e977657 BJ |
416 | if (IF_QFULL(&ifp->if_snd)) { |
417 | IF_DROP(&ifp->if_snd); | |
ee787340 | 418 | m_freem(m); |
1e977657 | 419 | splx(s); |
8a2f82db | 420 | return (ENOBUFS); |
1e977657 | 421 | } |
63665984 BJ |
422 | IF_ENQUEUE(&ifp->if_snd, m); |
423 | if (dmc_softc[ifp->if_unit].sc_oactive == 0) | |
424 | dmcstart(ifp->if_unit); | |
425 | splx(s); | |
8a2f82db | 426 | return (0); |
63665984 | 427 | } |