1 /* if_dmc.c 4.12 82/04/16 */ 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 br = 0x16; /* temporary ec hack */ 105 return (1); 106 } 107 108 /* 109 * Interface exists: make available by filling in network interface 110 * record. System will initialize the interface when it is ready 111 * to accept packets. 112 */ 113 dmcattach(ui) 114 register struct uba_device *ui; 115 { 116 register struct dmc_softc *sc = &dmc_softc[ui->ui_unit]; 117 register struct sockaddr_in *sin; 118 119 COUNT(DMCATTACH); 120 sc->sc_if.if_unit = ui->ui_unit; 121 sc->sc_if.if_name = "dmc"; 122 sc->sc_if.if_mtu = DMCMTU; 123 sc->sc_if.if_net = (ui->ui_flags & DMC_NET) >> 8; 124 sc->sc_if.if_host[0] = 17; /* random number */ 125 sin = (struct sockaddr_in *)&sc->sc_if.if_addr; 126 sin->sa_family = AF_INET; 127 sin->sin_addr = if_makeaddr(sc->sc_if.if_net, sc->sc_if.if_host[0]); 128 sc->sc_if.if_init = dmcinit; 129 sc->sc_if.if_output = dmcoutput; 130 sc->sc_if.if_ubareset = dmcreset; 131 sc->sc_ifuba.ifuba_flags = UBA_NEEDBDP | UBA_CANTWAIT; 132 if_attach(&sc->sc_if); 133 } 134 135 /* 136 * Reset of interface after UNIBUS reset. 137 * If interface is on specified UBA, reset it's state. 138 */ 139 dmcreset(unit, uban) 140 int unit, uban; 141 { 142 register struct uba_device *ui; 143 144 COUNT(DMCRESET); 145 if (unit >= NDMC || (ui = dmcinfo[unit]) == 0 || ui->ui_alive == 0 || 146 ui->ui_ubanum != uban) 147 return; 148 printf(" dmc%d", unit); 149 dmcinit(unit); 150 } 151 152 /* 153 * Initialization of interface; reinitialize UNIBUS usage. 154 */ 155 dmcinit(unit) 156 int unit; 157 { 158 register struct dmc_softc *sc = &dmc_softc[unit]; 159 register struct uba_device *ui = dmcinfo[unit]; 160 register struct dmcdevice *addr; 161 int base; 162 163 COUNT(DMCINIT); 164 printd("dmcinit\n"); 165 if ((sc->sc_flag&DMCBMAPPED) == 0) { 166 sc->sc_ubinfo = uballoc(ui->ui_ubanum, 167 (caddr_t)&dmc_base[unit], sizeof (struct dmc_base), 0); 168 sc->sc_flag |= DMCBMAPPED; 169 } 170 if (if_ubainit(&sc->sc_ifuba, ui->ui_ubanum, 0, 171 (int)btoc(DMCMTU)) == 0) { 172 printf("dmc%d: can't initialize\n", unit); 173 sc->sc_if.if_flags &= ~IFF_UP; 174 return; 175 } 176 addr = (struct dmcdevice *)ui->ui_addr; 177 addr->bsel2 |= DMC_IEO; 178 base = sc->sc_ubinfo & 0x3ffff; 179 printd(" base 0x%x\n", base); 180 dmcload(sc, DMC_BASEI, base, (base>>2)&DMC_XMEM); 181 dmcload(sc, DMC_CNTLI, 0, 0); 182 base = sc->sc_ifuba.ifu_r.ifrw_info & 0x3ffff; 183 dmcload(sc, DMC_READ, base, ((base>>2)&DMC_XMEM)|DMCMTU); 184 printd(" first read queued, addr 0x%x\n", base); 185 sc->sc_if.if_flags |= IFF_UP; 186 /* set up routing table entry */ 187 if ((sc->sc_if.if_flags & IFF_ROUTE) == 0) { 188 rtinit(&sc->sc_if.if_addr, &sc->sc_if.if_addr, 189 RTF_DIRECT|RTF_HOST|RTF_UP); 190 sc->sc_if.if_flags |= IFF_ROUTE; 191 } 192 } 193 194 /* 195 * Start output on interface. Get another datagram 196 * to send from the interface queue and map it to 197 * the interface before starting output. 198 */ 199 dmcstart(dev) 200 dev_t dev; 201 { 202 int unit = minor(dev); 203 struct uba_device *ui = dmcinfo[unit]; 204 register struct dmc_softc *sc = &dmc_softc[unit]; 205 int addr, len; 206 struct mbuf *m; 207 208 COUNT(DMCSTART); 209 printd("dmcstart\n"); 210 /* 211 * Dequeue a request and map it to the UNIBUS. 212 * If no more requests, just return. 213 */ 214 IF_DEQUEUE(&sc->sc_if.if_snd, m); 215 if (m == 0) 216 return; 217 len = if_wubaput(&sc->sc_ifuba, m); 218 219 /* 220 * Have request mapped to UNIBUS for transmission. 221 * Purge any stale data from this BDP and start the output. 222 */ 223 if (sc->sc_ifuba.ifuba_flags & UBA_NEEDBDP) 224 UBAPURGE(sc->sc_ifuba.ifu_uba, sc->sc_ifuba.ifu_w.ifrw_bdp); 225 addr = sc->sc_ifuba.ifu_w.ifrw_info & 0x3ffff; 226 printd(" len %d, addr 0x%x, ", len, addr); 227 printd("mr 0x%x\n", sc->sc_ifuba.ifu_w.ifrw_mr[0]); 228 dmcload(sc, DMC_WRITE, addr, (len&DMC_CCOUNT)|((addr>>2)&DMC_XMEM)); 229 sc->sc_oactive = 1; 230 } 231 232 /* 233 * Utility routine to load the DMC device registers. 234 */ 235 dmcload(sc, type, w0, w1) 236 register struct dmc_softc *sc; 237 int type, w0, w1; 238 { 239 register struct dmcdevice *addr; 240 register int unit, sps, n; 241 242 COUNT(DMCLOAD); 243 printd("dmcload: 0x%x 0x%x 0x%x\n", type, w0, w1); 244 unit = sc - dmc_softc; 245 addr = (struct dmcdevice *)dmcinfo[unit]->ui_addr; 246 sps = spl5(); 247 if ((n = sc->sc_que.c_cc) == 0) 248 addr->bsel0 = type | DMC_RQI; 249 else 250 (void) putc(type | DMC_RQI, &sc->sc_que); 251 (void) putw(w0, &sc->sc_que); 252 (void) putw(w1, &sc->sc_que); 253 if (n == 0) 254 dmcrint(unit); 255 splx(sps); 256 } 257 258 /* 259 * DMC interface receiver interrupt. 260 * Ready to accept another command, 261 * pull one off the command queue. 262 */ 263 dmcrint(unit) 264 int unit; 265 { 266 register struct dmc_softc *sc; 267 register struct dmcdevice *addr; 268 register int n; 269 int w0, w1; /* DEBUG */ 270 271 COUNT(DMCRINT); 272 addr = (struct dmcdevice *)dmcinfo[unit]->ui_addr; 273 sc = &dmc_softc[unit]; 274 while (addr->bsel0&DMC_RDYI) { 275 w0 = getw(&sc->sc_que); /* DEBUG */ 276 addr->sel4 = w0; /* DEBUG */ 277 w1 = getw(&sc->sc_que); /* DEBUG */ 278 addr->sel6 = w1; /* DEBUG */ 279 /* DEBUG 280 addr->sel4 = getw(&sc->sc_que); 281 addr->sel6 = getw(&sc->sc_que); 282 DEBUG */ 283 addr->bsel0 &= ~(DMC_IEI|DMC_RQI); 284 printd(" w0 0x%x, w1 0x%x\n", w0, w1); 285 while (addr->bsel0&DMC_RDYI) 286 ; 287 if (sc->sc_que.c_cc == 0) 288 return; 289 addr->bsel0 = getc(&sc->sc_que); 290 n = RDYSCAN; 291 while (n-- && (addr->bsel0&DMC_RDYI) == 0) 292 ; 293 } 294 if (sc->sc_que.c_cc) 295 addr->bsel0 |= DMC_IEI; 296 } 297 298 /* 299 * DMC interface transmitter interrupt. 300 * A transfer has completed, check for errors. 301 * If it was a read, notify appropriate protocol. 302 * If it was a write, pull the next one off the queue. 303 */ 304 dmcxint(unit) 305 int unit; 306 { 307 register struct dmc_softc *sc; 308 struct uba_device *ui = dmcinfo[unit]; 309 struct dmcdevice *addr; 310 struct mbuf *m; 311 register struct ifqueue *inq; 312 int arg, cmd, len; 313 314 COUNT(DMCXINT); 315 addr = (struct dmcdevice *)ui->ui_addr; 316 arg = addr->sel6; 317 cmd = addr->bsel2&7; 318 addr->bsel2 &= ~DMC_RDYO; 319 sc = &dmc_softc[unit]; 320 printd("dmcxint\n"); 321 switch (cmd) { 322 323 case DMC_OUR: 324 /* 325 * A read has completed. Purge input buffered 326 * data path. Pass packet to type specific 327 * higher-level input routine. 328 */ 329 sc->sc_if.if_ipackets++; 330 if (sc->sc_ifuba.ifuba_flags & UBA_NEEDBDP) 331 UBAPURGE(sc->sc_ifuba.ifu_uba, 332 sc->sc_ifuba.ifu_r.ifrw_bdp); 333 len = arg & DMC_CCOUNT; 334 printd(" read done, len %d\n", len); 335 switch (ui->ui_flags & DMC_AF) { 336 #ifdef INET 337 case AF_INET: 338 schednetisr(NETISR_IP); 339 inq = &ipintrq; 340 break; 341 #endif 342 343 default: 344 printf("dmc%d: unknown address type %d\n", unit, 345 ui->ui_flags & DMC_AF); 346 goto setup; 347 } 348 m = if_rubaget(&sc->sc_ifuba, len, 0); 349 if (m == 0) 350 goto setup; 351 if (IF_QFULL(inq)) { 352 IF_DROP(inq); 353 (void) m_freem(m); 354 } else 355 IF_ENQUEUE(inq, m); 356 357 setup: 358 arg = sc->sc_ifuba.ifu_r.ifrw_info & 0x3ffff; 359 dmcload(sc, DMC_READ, arg, ((arg >> 2) & DMC_XMEM) | DMCMTU); 360 return; 361 362 case DMC_OUX: 363 /* 364 * A write has completed, start another 365 * transfer if there is more data to send. 366 */ 367 if (sc->sc_oactive == 0) 368 return; /* SHOULD IT BE A FATAL ERROR? */ 369 printd(" write done\n"); 370 sc->sc_if.if_opackets++; 371 sc->sc_oactive = 0; 372 if (sc->sc_ifuba.ifu_xtofree) { 373 (void) m_freem(sc->sc_ifuba.ifu_xtofree); 374 sc->sc_ifuba.ifu_xtofree = 0; 375 } 376 if (sc->sc_if.if_snd.ifq_head == 0) 377 return; 378 dmcstart(unit); 379 return; 380 381 case DMC_CNTLO: 382 arg &= DMC_CNTMASK; 383 if (arg&DMC_FATAL) { 384 addr->bsel1 = DMC_MCLR; 385 sc->sc_flag &= ~DMCRUN; 386 /*** DO SOMETHING TO RESTART DEVICE ***/ 387 printf("DMC FATAL ERROR 0%o\n", arg); 388 } else { 389 /* ACCUMULATE STATISTICS */ 390 printf("DMC SOFT ERROR 0%o\n", arg); 391 } 392 return; 393 394 default: 395 printf("dmc%d: bad control %o\n", unit, cmd); 396 } 397 } 398 399 /* 400 * DMC output routine. 401 * Just send the data, header was supplied by 402 * upper level protocol routines. 403 */ 404 dmcoutput(ifp, m, dst) 405 register struct ifnet *ifp; 406 register struct mbuf *m; 407 struct sockaddr *dst; 408 { 409 struct uba_device *ui = dmcinfo[ifp->if_unit]; 410 int s; 411 412 COUNT(DMCOUTPUT); 413 printd("dmcoutput\n"); 414 if (dst->sa_family != (ui->ui_flags & DMC_AF)) { 415 printf("dmc%d: af%d not supported\n", ifp->if_unit, pf); 416 m_freem(m); 417 return (EAFNOSUPPORT); 418 } 419 s = splimp(); 420 if (IF_QFULL(&ifp->if_snd)) { 421 IF_DROP(&ifp->if_snd); 422 m_freem(m); 423 splx(s); 424 return (ENOBUFS); 425 } 426 IF_ENQUEUE(&ifp->if_snd, m); 427 if (dmc_softc[ifp->if_unit].sc_oactive == 0) 428 dmcstart(ifp->if_unit); 429 splx(s); 430 return (0); 431 } 432