Commit | Line | Data |
---|---|---|
5e35ed24 | 1 | /* if_acc.c 4.29 82/10/24 */ |
28081cf8 SL |
2 | |
3 | #include "acc.h" | |
4 | #ifdef NACC > 0 | |
5 | ||
6 | /* | |
7 | * ACC LH/DH ARPAnet IMP interface driver. | |
8 | */ | |
9 | ||
10 | #include "../h/param.h" | |
11 | #include "../h/systm.h" | |
12 | #include "../h/mbuf.h" | |
13 | #include "../h/pte.h" | |
14 | #include "../h/buf.h" | |
15 | #include "../h/protosw.h" | |
16 | #include "../h/socket.h" | |
28081cf8 | 17 | #include "../h/vmmac.h" |
a9687d27 | 18 | |
28081cf8 | 19 | #include "../net/if.h" |
d2cc167c | 20 | #include "../netimp/if_imp.h" |
a9687d27 BJ |
21 | |
22 | #include "../vax/cpu.h" | |
23 | #include "../vax/mtpr.h" | |
5e35ed24 | 24 | #include "../vaxif/if_accreg.h" |
d2cc167c | 25 | #include "../vaxif/if_uba.h" |
a9687d27 BJ |
26 | #include "../vaxuba/ubareg.h" |
27 | #include "../vaxuba/ubavar.h" | |
28081cf8 SL |
28 | |
29 | int accprobe(), accattach(), accrint(), accxint(); | |
30 | struct uba_device *accinfo[NACC]; | |
31 | u_short accstd[] = { 0 }; | |
32 | struct uba_driver accdriver = | |
33 | { accprobe, 0, accattach, 0, accstd, "acc", accinfo }; | |
34 | #define ACCUNIT(x) minor(x) | |
35 | ||
36 | int accinit(), accstart(), accreset(); | |
37 | ||
38 | /* | |
39 | * "Lower half" of IMP interface driver. | |
40 | * | |
41 | * Each IMP interface is handled by a common module which handles | |
42 | * the IMP-host protocol and a hardware driver which manages the | |
43 | * hardware specific details of talking with the IMP. | |
44 | * | |
45 | * The hardware portion of the IMP driver handles DMA and related | |
46 | * management of UNIBUS resources. The IMP protocol module interprets | |
47 | * contents of these messages and "controls" the actions of the | |
48 | * hardware module during IMP resets, but not, for instance, during | |
49 | * UNIBUS resets. | |
50 | * | |
51 | * The two modules are coupled at "attach time", and ever after, | |
52 | * through the imp interface structure. Higher level protocols, | |
53 | * e.g. IP, interact with the IMP driver, rather than the ACC. | |
54 | */ | |
55 | struct acc_softc { | |
56 | struct ifnet *acc_if; /* pointer to IMP's ifnet struct */ | |
57 | struct impcb *acc_ic; /* data structure shared with IMP */ | |
58 | struct ifuba acc_ifuba; /* UNIBUS resources */ | |
59 | struct mbuf *acc_iq; /* input reassembly queue */ | |
60 | short acc_olen; /* size of last message sent */ | |
61 | char acc_flush; /* flush remainder of message */ | |
28081cf8 SL |
62 | } acc_softc[NACC]; |
63 | ||
64 | /* | |
65 | * Reset the IMP and cause a transmitter interrupt by | |
66 | * performing a null DMA. | |
67 | */ | |
68 | accprobe(reg) | |
69 | caddr_t reg; | |
70 | { | |
71 | register int br, cvec; /* r11, r10 value-result */ | |
72 | register struct accdevice *addr = (struct accdevice *)reg; | |
73 | ||
28081cf8 SL |
74 | #ifdef lint |
75 | br = 0; cvec = br; br = cvec; | |
76 | accrint(0); accxint(0); | |
77 | #endif | |
a2cd4df7 BJ |
78 | addr->icsr = ACC_RESET; DELAY(5000); |
79 | addr->ocsr = ACC_RESET; DELAY(5000); | |
80 | addr->ocsr = OUT_BBACK; DELAY(5000); | |
81 | addr->owc = 0; | |
82 | addr->ocsr = ACC_IE | ACC_GO; DELAY(5000); | |
7dd4b7cb | 83 | addr->ocsr = 0; |
a2cd4df7 | 84 | if (cvec && cvec != 0x200) /* transmit -> receive */ |
28081cf8 | 85 | cvec -= 4; |
7d6f1cd5 SL |
86 | #ifdef ECHACK |
87 | br = 0x16; | |
88 | #endif | |
28081cf8 SL |
89 | return (1); |
90 | } | |
91 | ||
92 | /* | |
93 | * Call the IMP module to allow it to set up its internal | |
94 | * state, then tie the two modules together by setting up | |
95 | * the back pointers to common data structures. | |
96 | */ | |
97 | accattach(ui) | |
98 | struct uba_device *ui; | |
99 | { | |
100 | register struct acc_softc *sc = &acc_softc[ui->ui_unit]; | |
101 | register struct impcb *ip; | |
102 | struct ifimpcb { | |
103 | struct ifnet ifimp_if; | |
104 | struct impcb ifimp_impcb; | |
105 | } *ifimp; | |
106 | ||
92aca3da | 107 | if ((ifimp = (struct ifimpcb *)impattacch(ui, acreset)) == 0) |
a2cd4df7 | 108 | panic("accattach"); |
28081cf8 SL |
109 | sc->acc_if = &ifimp->ifimp_if; |
110 | ip = &ifimp->ifimp_impcb; | |
111 | sc->acc_ic = ip; | |
112 | ip->ic_init = accinit; | |
113 | ip->ic_start = accstart; | |
92aca3da | 114 | sc->acc_ifuba.ifu_flags = UBA_CANTWAIT; |
a2cd4df7 | 115 | #ifdef notdef |
7dfb87a5 | 116 | sc->acc_ifuba.ifu_flags |= UBA_NEEDBDP; |
a2cd4df7 | 117 | #endif |
28081cf8 SL |
118 | } |
119 | ||
120 | /* | |
121 | * Reset interface after UNIBUS reset. | |
122 | * If interface is on specified uba, reset its state. | |
123 | */ | |
124 | accreset(unit, uban) | |
125 | int unit, uban; | |
126 | { | |
127 | register struct uba_device *ui; | |
128 | struct acc_softc *sc; | |
129 | ||
28081cf8 SL |
130 | if (unit >= NACC || (ui = accinfo[unit]) == 0 || ui->ui_alive == 0 || |
131 | ui->ui_ubanum != uban) | |
132 | return; | |
133 | printf(" acc%d", unit); | |
134 | sc = &acc_softc[unit]; | |
135 | /* must go through IMP to allow it to set state */ | |
136 | (*sc->acc_if->if_init)(unit); | |
137 | } | |
138 | ||
139 | /* | |
140 | * Initialize interface: clear recorded pending operations, | |
a2cd4df7 BJ |
141 | * and retrieve, and initialize UNIBUS resources. Note |
142 | * return value is used by IMP init routine to mark IMP | |
143 | * unavailable for outgoing traffic. | |
28081cf8 SL |
144 | */ |
145 | accinit(unit) | |
146 | int unit; | |
147 | { | |
a2cd4df7 BJ |
148 | register struct acc_softc *sc; |
149 | register struct uba_device *ui; | |
28081cf8 | 150 | register struct accdevice *addr; |
7d47e8bb | 151 | int info; |
28081cf8 | 152 | |
a2cd4df7 BJ |
153 | if (unit >= NACC || (ui = accinfo[unit]) == 0 || ui->ui_alive == 0) { |
154 | printf("acc%d: not alive\n", unit); | |
155 | return (0); | |
156 | } | |
157 | sc = &acc_softc[unit]; | |
158 | /* | |
159 | * Header length is 0 since we have to passs | |
160 | * the IMP leader up to the protocol interpretation | |
161 | * routines. If we had the header length as | |
162 | * sizeof(struct imp_leader), then the if_ routines | |
163 | * would asssume we handle it on input and output. | |
164 | */ | |
668cc26d | 165 | if (if_ubainit(&sc->acc_ifuba, ui->ui_ubanum, 0, |
e431883e | 166 | (int)btoc(IMPMTU)) == 0) { |
28081cf8 | 167 | printf("acc%d: can't initialize\n", unit); |
7dfb87a5 SL |
168 | ui->ui_alive = 0; |
169 | return (0); | |
28081cf8 SL |
170 | } |
171 | addr = (struct accdevice *)ui->ui_addr; | |
172 | ||
a0b7c7fb | 173 | /* |
a2cd4df7 BJ |
174 | * Reset the imp interface; |
175 | * the delays are pure guesswork. | |
a0b7c7fb | 176 | */ |
a2cd4df7 | 177 | addr->ocsr = ACC_RESET; DELAY(5000); |
8129679e | 178 | addr->ocsr = OUT_BBACK; DELAY(5000); /* reset host master ready */ |
a2cd4df7 | 179 | addr->ocsr = 0; |
7dfb87a5 SL |
180 | if (accinputreset(addr, unit) == 0) { |
181 | ui->ui_alive = 0; | |
182 | return (0); | |
a2cd4df7 | 183 | } |
28081cf8 SL |
184 | |
185 | /* | |
186 | * Put up a read. We can't restart any outstanding writes | |
187 | * until we're back in synch with the IMP (i.e. we've flushed | |
188 | * the NOOPs it throws at us). | |
e431883e | 189 | * Note: IMPMTU includes the leader. |
28081cf8 | 190 | */ |
28081cf8 | 191 | info = sc->acc_ifuba.ifu_r.ifrw_info; |
a2cd4df7 | 192 | addr->iba = (u_short)info; |
e431883e | 193 | addr->iwc = -(IMPMTU >> 1); |
a2cd4df7 BJ |
194 | #ifdef LOOPBACK |
195 | addr->ocsr |= OUT_BBACK; | |
196 | #endif | |
197 | addr->icsr = | |
28081cf8 | 198 | IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO; |
a2cd4df7 | 199 | return (1); |
28081cf8 SL |
200 | } |
201 | ||
7dfb87a5 SL |
202 | accinputreset(addr, unit) |
203 | register struct accdevice *addr; | |
204 | register int unit; | |
205 | { | |
206 | register int i; | |
207 | ||
208 | addr->icsr = ACC_RESET; DELAY(5000); | |
209 | addr->icsr = IN_MRDY | IN_WEN; /* close the relay */ | |
210 | DELAY(10000); | |
211 | /* YECH!!! */ | |
212 | for (i = 0; i < 500; i++) { | |
213 | if ((addr->icsr & IN_HRDY) || | |
214 | (addr->icsr & (IN_RMR | IN_IMPBSY)) == 0) | |
215 | return (1); | |
216 | addr->icsr = IN_MRDY | IN_WEN; DELAY(10000); | |
217 | /* keep turning IN_RMR off */ | |
218 | } | |
219 | printf("acc%d: imp doesn't respond, icsr=%b\n", unit, | |
220 | addr->icsr, ACC_INBITS); | |
221 | return (0); | |
222 | } | |
223 | ||
28081cf8 SL |
224 | /* |
225 | * Start output on an interface. | |
226 | */ | |
227 | accstart(dev) | |
228 | dev_t dev; | |
229 | { | |
230 | int unit = ACCUNIT(dev), info; | |
28081cf8 SL |
231 | register struct acc_softc *sc = &acc_softc[unit]; |
232 | register struct accdevice *addr; | |
233 | struct mbuf *m; | |
234 | u_short cmd; | |
235 | ||
28081cf8 SL |
236 | if (sc->acc_ic->ic_oactive) |
237 | goto restart; | |
238 | ||
239 | /* | |
240 | * Not already active, deqeue a request and | |
241 | * map it onto the UNIBUS. If no more | |
242 | * requeusts, just return. | |
243 | */ | |
244 | IF_DEQUEUE(&sc->acc_if->if_snd, m); | |
245 | if (m == 0) { | |
246 | sc->acc_ic->ic_oactive = 0; | |
247 | return; | |
248 | } | |
249 | sc->acc_olen = if_wubaput(&sc->acc_ifuba, m); | |
250 | ||
251 | restart: | |
252 | /* | |
a2cd4df7 BJ |
253 | * Have request mapped to UNIBUS for |
254 | * transmission; start the output. | |
28081cf8 | 255 | */ |
a2cd4df7 BJ |
256 | if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP) |
257 | UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_w.ifrw_bdp); | |
bcb5db7d | 258 | addr = (struct accdevice *)accinfo[unit]->ui_addr; |
28081cf8 | 259 | info = sc->acc_ifuba.ifu_w.ifrw_info; |
a2cd4df7 BJ |
260 | addr->oba = (u_short)info; |
261 | addr->owc = -((sc->acc_olen + 1) >> 1); | |
28081cf8 | 262 | cmd = ACC_IE | OUT_ENLB | ((info & 0x30000) >> 12) | ACC_GO; |
a2cd4df7 BJ |
263 | #ifdef LOOPBACK |
264 | cmd |= OUT_BBACK; | |
265 | #endif | |
266 | addr->ocsr = cmd; | |
28081cf8 SL |
267 | sc->acc_ic->ic_oactive = 1; |
268 | } | |
269 | ||
270 | /* | |
271 | * Output interrupt handler. | |
272 | */ | |
273 | accxint(unit) | |
d2cc167c | 274 | int unit; |
28081cf8 | 275 | { |
28081cf8 SL |
276 | register struct acc_softc *sc = &acc_softc[unit]; |
277 | register struct accdevice *addr; | |
278 | ||
7dfb87a5 | 279 | addr = (struct accdevice *)accinfo[unit]->ui_addr; |
28081cf8 | 280 | if (sc->acc_ic->ic_oactive == 0) { |
7dfb87a5 SL |
281 | printf("acc%d: stray xmit interrupt, csr=%b\n", unit, |
282 | addr->ocsr, ACC_OUTBITS); | |
28081cf8 SL |
283 | return; |
284 | } | |
28081cf8 SL |
285 | sc->acc_if->if_opackets++; |
286 | sc->acc_ic->ic_oactive = 0; | |
7dd4b7cb | 287 | if (addr->ocsr & ACC_ERR) { |
7dfb87a5 SL |
288 | printf("acc%d: output error, ocsr=%b, icsr=%b\n", unit, |
289 | addr->ocsr, ACC_OUTBITS, addr->icsr, ACC_INBITS); | |
28081cf8 | 290 | sc->acc_if->if_oerrors++; |
a0b7c7fb | 291 | } |
a2cd4df7 BJ |
292 | if (sc->acc_ifuba.ifu_xtofree) { |
293 | m_freem(sc->acc_ifuba.ifu_xtofree); | |
294 | sc->acc_ifuba.ifu_xtofree = 0; | |
28081cf8 | 295 | } |
b690198c SL |
296 | if (sc->acc_if->if_snd.ifq_head) |
297 | accstart(unit); | |
28081cf8 SL |
298 | } |
299 | ||
300 | /* | |
301 | * Input interrupt handler | |
302 | */ | |
303 | accrint(unit) | |
d2cc167c | 304 | int unit; |
28081cf8 SL |
305 | { |
306 | register struct acc_softc *sc = &acc_softc[unit]; | |
307 | register struct accdevice *addr; | |
28081cf8 SL |
308 | struct mbuf *m; |
309 | int len, info; | |
310 | ||
7dfb87a5 | 311 | addr = (struct accdevice *)accinfo[unit]->ui_addr; |
28081cf8 SL |
312 | sc->acc_if->if_ipackets++; |
313 | ||
314 | /* | |
315 | * Purge BDP; flush message if error indicated. | |
316 | */ | |
a2cd4df7 BJ |
317 | if (sc->acc_ifuba.ifu_flags & UBA_NEEDBDP) |
318 | UBAPURGE(sc->acc_ifuba.ifu_uba, sc->acc_ifuba.ifu_r.ifrw_bdp); | |
7dd4b7cb | 319 | if (addr->icsr & ACC_ERR) { |
b690198c SL |
320 | printf("acc%d: input error, csr=%b\n", unit, |
321 | addr->icsr, ACC_INBITS); | |
28081cf8 SL |
322 | sc->acc_if->if_ierrors++; |
323 | sc->acc_flush = 1; | |
324 | } | |
325 | ||
326 | if (sc->acc_flush) { | |
a2cd4df7 | 327 | if (addr->icsr & IN_EOM) |
28081cf8 SL |
328 | sc->acc_flush = 0; |
329 | goto setup; | |
330 | } | |
e431883e BJ |
331 | len = IMPMTU + (addr->iwc << 1); |
332 | if (len < 0 || len > IMPMTU) { | |
a2cd4df7 BJ |
333 | printf("acc%d: bad length=%d\n", len); |
334 | sc->acc_if->if_ierrors++; | |
335 | goto setup; | |
336 | } | |
28081cf8 SL |
337 | |
338 | /* | |
339 | * The last parameter is always 0 since using | |
340 | * trailers on the ARPAnet is insane. | |
341 | */ | |
342 | m = if_rubaget(&sc->acc_ifuba, len, 0); | |
343 | if (m == 0) | |
344 | goto setup; | |
a2cd4df7 | 345 | if ((addr->icsr & IN_EOM) == 0) { |
a0b7c7fb | 346 | if (sc->acc_iq) |
28081cf8 | 347 | m_cat(sc->acc_iq, m); |
a0b7c7fb | 348 | else |
28081cf8 | 349 | sc->acc_iq = m; |
28081cf8 SL |
350 | goto setup; |
351 | } | |
a0b7c7fb | 352 | if (sc->acc_iq) { |
28081cf8 SL |
353 | m_cat(sc->acc_iq, m); |
354 | m = sc->acc_iq; | |
355 | sc->acc_iq = 0; | |
28081cf8 SL |
356 | } |
357 | impinput(unit, m); | |
358 | ||
359 | setup: | |
360 | /* | |
361 | * Setup for next message. | |
362 | */ | |
363 | info = sc->acc_ifuba.ifu_r.ifrw_info; | |
a2cd4df7 | 364 | addr->iba = (u_short)info; |
e431883e | 365 | addr->iwc = -(IMPMTU >> 1); |
a2cd4df7 | 366 | addr->icsr = |
28081cf8 SL |
367 | IN_MRDY | ACC_IE | IN_WEN | ((info & 0x30000) >> 12) | ACC_GO; |
368 | } | |
369 | #endif |