1 /* if_dmc.c 4.10 82/04/10 */ 2 3 #include "dmc.h" 4 #if NDMC > 0 5 #define printd if(dmcdebug)printf 6 int dmcdebug = 1; 7 /* 8 * DMC11 device driver, internet version 9 * 10 * TODO 11 * allow more than one outstanding read or write. 12 */ 13 14 #include "../h/param.h" 15 #include "../h/systm.h" 16 #include "../h/mbuf.h" 17 #include "../h/pte.h" 18 #include "../h/buf.h" 19 #include "../h/tty.h" 20 #include "../h/protosw.h" 21 #include "../h/socket.h" 22 #include "../h/ubareg.h" 23 #include "../h/ubavar.h" 24 #include "../h/cpu.h" 25 #include "../h/mtpr.h" 26 #include "../h/vmmac.h" 27 #include "../net/in.h" 28 #include "../net/in_systm.h" 29 #include "../net/if.h" 30 #include "../net/if_uba.h" 31 #include "../net/if_dmc.h" 32 #include "../net/ip.h" 33 #include "../net/ip_var.h" 34 #include "../net/route.h" 35 #include <errno.h> 36 37 /* 38 * Driver information for auto-configuration stuff. 39 */ 40 int dmcprobe(), dmcattach(), dmcinit(), dmcoutput(), dmcreset(); 41 struct uba_device *dmcinfo[NDMC]; 42 u_short dmcstd[] = { 0 }; 43 struct uba_driver dmcdriver = 44 { dmcprobe, 0, dmcattach, 0, dmcstd, "dmc", dmcinfo }; 45 46 #define DMC_AF 0xff /* 8 bits of address type in ui_flags */ 47 #define DMC_NET 0xff00 /* 8 bits of net number in ui_flags */ 48 49 /* 50 * DMC software status per interface. 51 * 52 * Each interface is referenced by a network interface structure, 53 * sc_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 dmc_softc { 62 struct ifnet sc_if; /* network-visible interface */ 63 struct ifuba sc_ifuba; /* UNIBUS resources */ 64 short sc_flag; /* flags */ 65 short sc_oactive; /* output active */ 66 int sc_ubinfo; /* UBA mapping info for base table */ 67 struct clist sc_que; /* command queue */ 68 } dmc_softc[NDMC]; 69 70 /* flags */ 71 #define DMCRUN 01 72 #define DMCBMAPPED 02 /* base table mapped */ 73 74 struct dmc_base { 75 short d_base[128]; /* DMC base table */ 76 } dmc_base[NDMC]; 77 78 #define loword(x) ((short *)&x)[0] 79 #define hiword(x) ((short *)&x)[1] 80 81 dmcprobe(reg) 82 caddr_t reg; 83 { 84 register int br, cvec; 85 register struct dmcdevice *addr = (struct dmcdevice *)reg; 86 register int i; 87 88 COUNT(DMCPROBE); 89 #ifdef lint 90 br = 0; cvec = br; br = cvec; 91 dmcrint(0); dmcxint(0); 92 #endif 93 addr->bsel1 = DMC_MCLR; 94 for (i = 100000; i && (addr->bsel1 & DMC_RUN) == 0; i--) 95 ; 96 if ((addr->bsel1 & DMC_RUN) == 0) 97 return (0); 98 addr->bsel1 &= ~DMC_MCLR; 99 addr->bsel0 = DMC_RQI|DMC_IEI; 100 DELAY(100000); 101 addr->bsel1 = DMC_MCLR; 102 for (i = 100000; i && (addr->bsel1 & DMC_RUN) == 0; i--) 103 ; 104 return (1); 105 } 106 107 /* 108 * Interface exists: make available by filling in network interface 109 * record. System will initialize the interface when it is ready 110 * to accept packets. 111 */ 112 dmcattach(ui) 113 register struct uba_device *ui; 114 { 115 register struct dmc_softc *sc = &dmc_softc[ui->ui_unit]; 116 register struct sockaddr_in *sin; 117 118 COUNT(DMCATTACH); 119 sc->sc_if.if_unit = ui->ui_unit; 120 sc->sc_if.if_name = "dmc"; 121 sc->sc_if.if_mtu = DMCMTU; 122 sc->sc_if.if_net = (ui->ui_flags & DMC_NET) >> 8; 123 sc->sc_if.if_host[0] = 17; /* random number */ 124 sin = (struct sockaddr_in *)&sc->sc_if.if_addr; 125 sin->sa_family = AF_INET; 126 sin->sin_addr = if_makeaddr(sc->sc_if.if_net, sc->sc_if.if_host[0]); 127 sc->sc_if.if_init = dmcinit; 128 sc->sc_if.if_output = dmcoutput; 129 sc->sc_if.if_ubareset = dmcreset; 130 sc->sc_ifuba.ifuba_flags = UBA_NEEDBDP; 131 if_attach(&sc->sc_if); 132 } 133 134 /* 135 * Reset of interface after UNIBUS reset. 136 * If interface is on specified UBA, reset it's state. 137 */ 138 dmcreset(unit, uban) 139 int unit, uban; 140 { 141 register struct uba_device *ui; 142 143 COUNT(DMCRESET); 144 if (unit >= NDMC || (ui = dmcinfo[unit]) == 0 || ui->ui_alive == 0 || 145 ui->ui_ubanum != uban) 146 return; 147 printf(" dmc%d", unit); 148 dmcinit(unit); 149 } 150 151 /* 152 * Initialization of interface; reinitialize UNIBUS usage. 153 */ 154 dmcinit(unit) 155 int unit; 156 { 157 register struct dmc_softc *sc = &dmc_softc[unit]; 158 register struct uba_device *ui = dmcinfo[unit]; 159 register struct dmcdevice *addr; 160 int base; 161 162 COUNT(DMCINIT); 163 printd("dmcinit\n"); 164 if ((sc->sc_flag&DMCBMAPPED) == 0) { 165 sc->sc_ubinfo = uballoc(ui->ui_ubanum, 166 (caddr_t)&dmc_base[unit], sizeof (struct dmc_base), 0); 167 sc->sc_flag |= DMCBMAPPED; 168 } 169 if (if_ubainit(&sc->sc_ifuba, ui->ui_ubanum, 0, 170 (int)btoc(DMCMTU)) == 0) { 171 printf("dmc%d: can't initialize\n", unit); 172 sc->sc_if.if_flags &= ~IFF_UP; 173 return; 174 } 175 addr = (struct dmcdevice *)ui->ui_addr; 176 addr->bsel2 |= DMC_IEO; 177 base = sc->sc_ubinfo & 0x3ffff; 178 printd(" base 0x%x\n", base); 179 dmcload(sc, DMC_BASEI, base, (base>>2)&DMC_XMEM); 180 dmcload(sc, DMC_CNTLI, 0, 0); 181 base = sc->sc_ifuba.ifu_r.ifrw_info & 0x3ffff; 182 dmcload(sc, DMC_READ, base, ((base>>2)&DMC_XMEM)|DMCMTU); 183 printd(" first read queued, addr 0x%x\n", base); 184 sc->sc_if.if_flags |= IFF_UP; 185 /* set up routing table entry */ 186 if ((sc->sc_if.if_flags & IFF_ROUTE) == 0) { 187 rtinit(&sc->sc_if.if_addr, &sc->sc_if.if_addr, 188 RTF_DIRECT|RTF_HOST|RTF_UP); 189 sc->sc_if.if_flags |= IFF_ROUTE; 190 } 191 } 192 193 /* 194 * Start output on interface. Get another datagram 195 * to send from the interface queue and map it to 196 * the interface before starting output. 197 */ 198 dmcstart(dev) 199 dev_t dev; 200 { 201 int unit = minor(dev); 202 struct uba_device *ui = dmcinfo[unit]; 203 register struct dmc_softc *sc = &dmc_softc[unit]; 204 int addr, len; 205 struct mbuf *m; 206 207 COUNT(DMCSTART); 208 printd("dmcstart\n"); 209 /* 210 * Dequeue a request and map it to the UNIBUS. 211 * If no more requests, just return. 212 */ 213 IF_DEQUEUE(&sc->sc_if.if_snd, m); 214 if (m == 0) 215 return; 216 len = if_wubaput(&sc->sc_ifuba, m); 217 218 /* 219 * Have request mapped to UNIBUS for transmission. 220 * Purge any stale data from this BDP and start the output. 221 */ 222 if (sc->sc_ifuba.ifuba_flags & UBA_NEEDBDP) 223 UBAPURGE(sc->sc_ifuba.ifu_uba, sc->sc_ifuba.ifu_w.ifrw_bdp); 224 addr = sc->sc_ifuba.ifu_w.ifrw_info & 0x3ffff; 225 printd(" len %d, addr 0x%x, ", len, addr); 226 printd("mr 0x%x\n", sc->sc_ifuba.ifu_w.ifrw_mr[0]); 227 dmcload(sc, DMC_WRITE, addr, (len&DMC_CCOUNT)|((addr>>2)&DMC_XMEM)); 228 sc->sc_oactive = 1; 229 } 230 231 /* 232 * Utility routine to load the DMC device registers. 233 */ 234 dmcload(sc, type, w0, w1) 235 register struct dmc_softc *sc; 236 int type, w0, w1; 237 { 238 register struct dmcdevice *addr; 239 register int unit, sps, n; 240 241 COUNT(DMCLOAD); 242 printd("dmcload: 0x%x 0x%x 0x%x\n", type, w0, w1); 243 unit = sc - dmc_softc; 244 addr = (struct dmcdevice *)dmcinfo[unit]->ui_addr; 245 sps = spl5(); 246 if ((n = sc->sc_que.c_cc) == 0) 247 addr->bsel0 = type | DMC_RQI; 248 else 249 (void) putc(type | DMC_RQI, &sc->sc_que); 250 (void) putw(w0, &sc->sc_que); 251 (void) putw(w1, &sc->sc_que); 252 if (n == 0) 253 dmcrint(unit); 254 splx(sps); 255 } 256 257 /* 258 * DMC interface receiver interrupt. 259 * Ready to accept another command, 260 * pull one off the command queue. 261 */ 262 dmcrint(unit) 263 int unit; 264 { 265 register struct dmc_softc *sc; 266 register struct dmcdevice *addr; 267 register int n; 268 int w0, w1; /* DEBUG */ 269 270 COUNT(DMCRINT); 271 addr = (struct dmcdevice *)dmcinfo[unit]->ui_addr; 272 sc = &dmc_softc[unit]; 273 while (addr->bsel0&DMC_RDYI) { 274 w0 = getw(&sc->sc_que); /* DEBUG */ 275 addr->sel4 = w0; /* DEBUG */ 276 w1 = getw(&sc->sc_que); /* DEBUG */ 277 addr->sel6 = w1; /* DEBUG */ 278 /* DEBUG 279 addr->sel4 = getw(&sc->sc_que); 280 addr->sel6 = getw(&sc->sc_que); 281 DEBUG */ 282 addr->bsel0 &= ~(DMC_IEI|DMC_RQI); 283 printd(" w0 0x%x, w1 0x%x\n", w0, w1); 284 while (addr->bsel0&DMC_RDYI) 285 ; 286 if (sc->sc_que.c_cc == 0) 287 return; 288 addr->bsel0 = getc(&sc->sc_que); 289 n = RDYSCAN; 290 while (n-- && (addr->bsel0&DMC_RDYI) == 0) 291 ; 292 } 293 if (sc->sc_que.c_cc) 294 addr->bsel0 |= DMC_IEI; 295 } 296 297 /* 298 * DMC interface transmitter interrupt. 299 * A transfer has completed, check for errors. 300 * If it was a read, notify appropriate protocol. 301 * If it was a write, pull the next one off the queue. 302 */ 303 dmcxint(unit) 304 int unit; 305 { 306 register struct dmc_softc *sc; 307 struct uba_device *ui = dmcinfo[unit]; 308 struct dmcdevice *addr; 309 struct mbuf *m; 310 register struct ifqueue *inq; 311 int arg, cmd, len; 312 313 COUNT(DMCXINT); 314 addr = (struct dmcdevice *)ui->ui_addr; 315 arg = addr->sel6; 316 cmd = addr->bsel2&7; 317 addr->bsel2 &= ~DMC_RDYO; 318 sc = &dmc_softc[unit]; 319 printd("dmcxint\n"); 320 switch (cmd) { 321 322 case DMC_OUR: 323 /* 324 * A read has completed. Purge input buffered 325 * data path. Pass packet to type specific 326 * higher-level input routine. 327 */ 328 sc->sc_if.if_ipackets++; 329 if (sc->sc_ifuba.ifuba_flags & UBA_NEEDBDP) 330 UBAPURGE(sc->sc_ifuba.ifu_uba, 331 sc->sc_ifuba.ifu_r.ifrw_bdp); 332 len = arg & DMC_CCOUNT; 333 printd(" read done, len %d\n", len); 334 switch (ui->ui_flags & DMC_AF) { 335 #ifdef INET 336 case AF_INET: 337 schednetisr(NETISR_IP); 338 inq = &ipintrq; 339 break; 340 #endif 341 342 default: 343 printf("dmc%d: unknown address type %d\n", unit, 344 ui->ui_flags & DMC_AF); 345 goto setup; 346 } 347 m = if_rubaget(&sc->sc_ifuba, len, 0); 348 if (m == 0) 349 goto setup; 350 if (IF_QFULL(inq)) { 351 IF_DROP(inq); 352 (void) m_freem(m); 353 } else 354 IF_ENQUEUE(inq, m); 355 356 setup: 357 arg = sc->sc_ifuba.ifu_r.ifrw_info & 0x3ffff; 358 dmcload(sc, DMC_READ, arg, ((arg >> 2) & DMC_XMEM) | DMCMTU); 359 return; 360 361 case DMC_OUX: 362 /* 363 * A write has completed, start another 364 * transfer if there is more data to send. 365 */ 366 if (sc->sc_oactive == 0) 367 return; /* SHOULD IT BE A FATAL ERROR? */ 368 printd(" write done\n"); 369 sc->sc_if.if_opackets++; 370 sc->sc_oactive = 0; 371 if (sc->sc_ifuba.ifu_xtofree) { 372 (void) m_freem(sc->sc_ifuba.ifu_xtofree); 373 sc->sc_ifuba.ifu_xtofree = 0; 374 } 375 if (sc->sc_if.if_snd.ifq_head == 0) 376 return; 377 dmcstart(unit); 378 return; 379 380 case DMC_CNTLO: 381 arg &= DMC_CNTMASK; 382 if (arg&DMC_FATAL) { 383 addr->bsel1 = DMC_MCLR; 384 sc->sc_flag &= ~DMCRUN; 385 /*** DO SOMETHING TO RESTART DEVICE ***/ 386 printf("DMC FATAL ERROR 0%o\n", arg); 387 } else { 388 /* ACCUMULATE STATISTICS */ 389 printf("DMC SOFT ERROR 0%o\n", arg); 390 } 391 return; 392 393 default: 394 printf("dmc%d: bad control %o\n", unit, cmd); 395 } 396 } 397 398 /* 399 * DMC output routine. 400 * Just send the data, header was supplied by 401 * upper level protocol routines. 402 */ 403 dmcoutput(ifp, m, dst) 404 register struct ifnet *ifp; 405 register struct mbuf *m; 406 struct sockaddr *dst; 407 { 408 struct uba_device *ui = dmcinfo[ifp->if_unit]; 409 int s; 410 411 COUNT(DMCOUTPUT); 412 printd("dmcoutput\n"); 413 if (dst->sa_family != (ui->ui_flags & DMC_AF)) { 414 printf("dmc%d: af%d not supported\n", ifp->if_unit, pf); 415 m_freem(m); 416 return (EAFNOSUPPORT); 417 } 418 s = splimp(); 419 if (IF_QFULL(&ifp->if_snd)) { 420 IF_DROP(&ifp->if_snd); 421 m_freem(m); 422 splx(s); 423 return (ENOBUFS); 424 } 425 IF_ENQUEUE(&ifp->if_snd, m); 426 if (dmc_softc[ifp->if_unit].sc_oactive == 0) 427 dmcstart(ifp->if_unit); 428 splx(s); 429 return (0); 430 } 431