| 1 | /* if_dmc.c 4.6 82/03/19 */ |
| 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 | |
| 35 | /* |
| 36 | * Driver information for auto-configuration stuff. |
| 37 | */ |
| 38 | int dmcprobe(), dmcattach(), dmcinit(), dmcoutput(), dmcreset(); |
| 39 | struct uba_device *dmcinfo[NDMC]; |
| 40 | u_short dmcstd[] = { 0 }; |
| 41 | struct uba_driver dmcdriver = |
| 42 | { dmcprobe, 0, dmcattach, 0, dmcstd, "dmc", dmcinfo }; |
| 43 | |
| 44 | #define DMC_PF 0xff /* 8 bits of protocol type in ui_flags */ |
| 45 | #define DMC_NET 0xff00 /* 8 bits of net number in ui_flags */ |
| 46 | |
| 47 | /* |
| 48 | * DMC software status per interface. |
| 49 | * |
| 50 | * Each interface is referenced by a network interface structure, |
| 51 | * sc_if, which the routing code uses to locate the interface. |
| 52 | * This structure contains the output queue for the interface, its address, ... |
| 53 | * We also have, for each interface, a UBA interface structure, which |
| 54 | * contains information about the UNIBUS resources held by the interface: |
| 55 | * map registers, buffered data paths, etc. Information is cached in this |
| 56 | * structure for use by the if_uba.c routines in running the interface |
| 57 | * efficiently. |
| 58 | */ |
| 59 | struct dmc_softc { |
| 60 | struct ifnet sc_if; /* network-visible interface */ |
| 61 | struct ifuba sc_ifuba; /* UNIBUS resources */ |
| 62 | short sc_flag; /* flags */ |
| 63 | short sc_oactive; /* output active */ |
| 64 | int sc_ubinfo; /* UBA mapping info for base table */ |
| 65 | struct clist sc_que; /* command queue */ |
| 66 | } dmc_softc[NDMC]; |
| 67 | |
| 68 | /* flags */ |
| 69 | #define DMCRUN 01 |
| 70 | #define DMCBMAPPED 02 /* base table mapped */ |
| 71 | |
| 72 | struct dmc_base { |
| 73 | short d_base[128]; /* DMC base table */ |
| 74 | } dmc_base[NDMC]; |
| 75 | |
| 76 | #define loword(x) ((short *)&x)[0] |
| 77 | #define hiword(x) ((short *)&x)[1] |
| 78 | |
| 79 | dmcprobe(reg) |
| 80 | caddr_t reg; |
| 81 | { |
| 82 | register int br, cvec; |
| 83 | register struct dmcdevice *addr = (struct dmcdevice *)reg; |
| 84 | register int i; |
| 85 | |
| 86 | #ifdef lint |
| 87 | br = 0; cvec = br; br = cvec; |
| 88 | dmcrint(0); dmcxint(0); |
| 89 | #endif |
| 90 | addr->bsel1 = DMC_MCLR; |
| 91 | for (i = 100000; i && (addr->bsel1 & DMC_RUN) == 0; i--) |
| 92 | ; |
| 93 | if ((addr->bsel1 & DMC_RUN) == 0) |
| 94 | return(0); |
| 95 | addr->bsel1 &= ~DMC_MCLR; |
| 96 | addr->bsel0 = DMC_RQI|DMC_IEI; |
| 97 | DELAY(100000); |
| 98 | addr->bsel1 = DMC_MCLR; |
| 99 | for (i = 100000; i && (addr->bsel1 & DMC_RUN) == 0; i--) |
| 100 | ; |
| 101 | return(1); |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * Interface exists: make available by filling in network interface |
| 106 | * record. System will initialize the interface when it is ready |
| 107 | * to accept packets. |
| 108 | */ |
| 109 | dmcattach(ui) |
| 110 | register struct uba_device *ui; |
| 111 | { |
| 112 | register struct dmc_softc *sc = &dmc_softc[ui->ui_unit]; |
| 113 | |
| 114 | sc->sc_if.if_unit = ui->ui_unit; |
| 115 | sc->sc_if.if_name = "dmc"; |
| 116 | sc->sc_if.if_mtu = DMCMTU; |
| 117 | sc->sc_if.if_net = (ui->ui_flags & DMC_NET) >> 8; |
| 118 | sc->sc_if.if_host[0] = 17; /* random number */ |
| 119 | sc->sc_if.if_addr = |
| 120 | if_makeaddr(sc->sc_if.if_net, sc->sc_if.if_host[0]); |
| 121 | sc->sc_if.if_init = dmcinit; |
| 122 | sc->sc_if.if_output = dmcoutput; |
| 123 | sc->sc_if.if_ubareset = dmcreset; |
| 124 | sc->sc_ifuba.ifuba_flags = UBA_NEEDBDP; |
| 125 | if_attach(&sc->sc_if); |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * Reset of interface after UNIBUS reset. |
| 130 | * If interface is on specified UBA, reset it's state. |
| 131 | */ |
| 132 | dmcreset(unit, uban) |
| 133 | int unit, uban; |
| 134 | { |
| 135 | register struct uba_device *ui; |
| 136 | |
| 137 | if (unit >= NDMC || (ui = dmcinfo[unit]) == 0 || ui->ui_alive == 0 || |
| 138 | ui->ui_ubanum != uban) |
| 139 | return; |
| 140 | printf(" dmc%d", unit); |
| 141 | dmcinit(unit); |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * Initialization of interface; reinitialize UNIBUS usage. |
| 146 | */ |
| 147 | dmcinit(unit) |
| 148 | int unit; |
| 149 | { |
| 150 | register struct dmc_softc *sc = &dmc_softc[unit]; |
| 151 | register struct uba_device *ui = dmcinfo[unit]; |
| 152 | register struct dmcdevice *addr; |
| 153 | int base; |
| 154 | |
| 155 | printd("dmcinit\n"); |
| 156 | if ((sc->sc_flag&DMCBMAPPED) == 0) { |
| 157 | sc->sc_ubinfo = uballoc(ui->ui_ubanum, |
| 158 | (caddr_t)&dmc_base[unit], sizeof (struct dmc_base), 0); |
| 159 | sc->sc_flag |= DMCBMAPPED; |
| 160 | } |
| 161 | if (if_ubainit(&sc->sc_ifuba, ui->ui_ubanum, 0, |
| 162 | (int)btoc(DMCMTU)) == 0) { |
| 163 | printf("dmc%d: can't initialize\n", unit); |
| 164 | return; |
| 165 | } |
| 166 | addr = (struct dmcdevice *)ui->ui_addr; |
| 167 | addr->bsel2 |= DMC_IEO; |
| 168 | base = sc->sc_ubinfo & 0x3ffff; |
| 169 | printd(" base 0x%x\n", base); |
| 170 | dmcload(sc, DMC_BASEI, base, (base>>2)&DMC_XMEM); |
| 171 | dmcload(sc, DMC_CNTLI, 0, 0); |
| 172 | base = sc->sc_ifuba.ifu_r.ifrw_info & 0x3ffff; |
| 173 | dmcload(sc, DMC_READ, base, ((base>>2)&DMC_XMEM)|DMCMTU); |
| 174 | printd(" first read queued, addr 0x%x\n", base); |
| 175 | } |
| 176 | |
| 177 | /* |
| 178 | * Start output on interface. Get another datagram |
| 179 | * to send from the interface queue and map it to |
| 180 | * the interface before starting output. |
| 181 | */ |
| 182 | dmcstart(dev) |
| 183 | dev_t dev; |
| 184 | { |
| 185 | int unit = minor(dev); |
| 186 | struct uba_device *ui = dmcinfo[unit]; |
| 187 | register struct dmc_softc *sc = &dmc_softc[unit]; |
| 188 | int addr, len; |
| 189 | struct mbuf *m; |
| 190 | |
| 191 | printd("dmcstart\n"); |
| 192 | /* |
| 193 | * Dequeue a request and map it to the UNIBUS. |
| 194 | * If no more requests, just return. |
| 195 | */ |
| 196 | IF_DEQUEUE(&sc->sc_if.if_snd, m); |
| 197 | if (m == 0) |
| 198 | return; |
| 199 | len = if_wubaput(&sc->sc_ifuba, m); |
| 200 | |
| 201 | /* |
| 202 | * Have request mapped to UNIBUS for transmission. |
| 203 | * Purge any stale data from this BDP and start the output. |
| 204 | */ |
| 205 | if (sc->sc_ifuba.ifuba_flags & UBA_NEEDBDP) |
| 206 | UBAPURGE(sc->sc_ifuba.ifu_uba, sc->sc_ifuba.ifu_w.ifrw_bdp); |
| 207 | addr = sc->sc_ifuba.ifu_w.ifrw_info & 0x3ffff; |
| 208 | printd(" len %d, addr 0x%x, ", len, addr); |
| 209 | printd("mr 0x%x\n", sc->sc_ifuba.ifu_w.ifrw_mr[0]); |
| 210 | dmcload(sc, DMC_WRITE, addr, (len&DMC_CCOUNT)|((addr>>2)&DMC_XMEM)); |
| 211 | sc->sc_oactive = 1; |
| 212 | } |
| 213 | |
| 214 | /* |
| 215 | * Utility routine to load the DMC device registers. |
| 216 | */ |
| 217 | dmcload(sc, type, w0, w1) |
| 218 | register struct dmc_softc *sc; |
| 219 | int type, w0, w1; |
| 220 | { |
| 221 | register struct dmcdevice *addr; |
| 222 | register int unit, sps, n; |
| 223 | |
| 224 | printd("dmcload: 0x%x 0x%x 0x%x\n", type, w0, w1); |
| 225 | unit = sc - dmc_softc; |
| 226 | addr = (struct dmcdevice *)dmcinfo[unit]->ui_addr; |
| 227 | sps = spl5(); |
| 228 | if ((n = sc->sc_que.c_cc) == 0) |
| 229 | addr->bsel0 = type | DMC_RQI; |
| 230 | else |
| 231 | (void) putc(type | DMC_RQI, &sc->sc_que); |
| 232 | (void) putw(w0, &sc->sc_que); |
| 233 | (void) putw(w1, &sc->sc_que); |
| 234 | if (n == 0) |
| 235 | dmcrint(unit); |
| 236 | splx(sps); |
| 237 | } |
| 238 | |
| 239 | /* |
| 240 | * DMC interface receiver interrupt. |
| 241 | * Ready to accept another command, |
| 242 | * pull one off the command queue. |
| 243 | */ |
| 244 | dmcrint(unit) |
| 245 | int unit; |
| 246 | { |
| 247 | register struct dmc_softc *sc; |
| 248 | register struct dmcdevice *addr; |
| 249 | register int n; |
| 250 | int w0, w1; /* DEBUG */ |
| 251 | |
| 252 | addr = (struct dmcdevice *)dmcinfo[unit]->ui_addr; |
| 253 | sc = &dmc_softc[unit]; |
| 254 | while (addr->bsel0&DMC_RDYI) { |
| 255 | w0 = getw(&sc->sc_que); /* DEBUG */ |
| 256 | addr->sel4 = w0; /* DEBUG */ |
| 257 | w1 = getw(&sc->sc_que); /* DEBUG */ |
| 258 | addr->sel6 = w1; /* DEBUG */ |
| 259 | /* DEBUG |
| 260 | addr->sel4 = getw(&sc->sc_que); |
| 261 | addr->sel6 = getw(&sc->sc_que); |
| 262 | DEBUG */ |
| 263 | addr->bsel0 &= ~(DMC_IEI|DMC_RQI); |
| 264 | printd(" w0 0x%x, w1 0x%x\n", w0, w1); |
| 265 | while (addr->bsel0&DMC_RDYI) |
| 266 | ; |
| 267 | if (sc->sc_que.c_cc == 0) |
| 268 | return; |
| 269 | addr->bsel0 = getc(&sc->sc_que); |
| 270 | n = RDYSCAN; |
| 271 | while (n-- && (addr->bsel0&DMC_RDYI) == 0) |
| 272 | ; |
| 273 | } |
| 274 | if (sc->sc_que.c_cc) |
| 275 | addr->bsel0 |= DMC_IEI; |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | * DMC interface transmitter interrupt. |
| 280 | * A transfer has completed, check for errors. |
| 281 | * If it was a read, notify appropriate protocol. |
| 282 | * If it was a write, pull the next one off the queue. |
| 283 | */ |
| 284 | dmcxint(unit) |
| 285 | int unit; |
| 286 | { |
| 287 | register struct dmc_softc *sc; |
| 288 | struct uba_device *ui = dmcinfo[unit]; |
| 289 | struct dmcdevice *addr; |
| 290 | struct mbuf *m; |
| 291 | register struct ifqueue *inq; |
| 292 | int arg, cmd, len; |
| 293 | |
| 294 | addr = (struct dmcdevice *)ui->ui_addr; |
| 295 | arg = addr->sel6; |
| 296 | cmd = addr->bsel2&7; |
| 297 | addr->bsel2 &= ~DMC_RDYO; |
| 298 | sc = &dmc_softc[unit]; |
| 299 | printd("dmcxint\n"); |
| 300 | switch (cmd) { |
| 301 | |
| 302 | case DMC_OUR: |
| 303 | /* |
| 304 | * A read has completed. Purge input buffered |
| 305 | * data path. Pass packet to type specific |
| 306 | * higher-level input routine. |
| 307 | */ |
| 308 | sc->sc_if.if_ipackets++; |
| 309 | if (sc->sc_ifuba.ifuba_flags & UBA_NEEDBDP) |
| 310 | UBAPURGE(sc->sc_ifuba.ifu_uba, |
| 311 | sc->sc_ifuba.ifu_r.ifrw_bdp); |
| 312 | len = arg & DMC_CCOUNT; |
| 313 | printd(" read done, len %d\n", len); |
| 314 | switch (ui->ui_flags & DMC_PF) { |
| 315 | #ifdef INET |
| 316 | case PF_INET: |
| 317 | schednetisr(NETISR_IP); |
| 318 | inq = &ipintrq; |
| 319 | break; |
| 320 | #endif |
| 321 | |
| 322 | default: |
| 323 | printf("dmc%d: unknown packet type %d\n", unit, |
| 324 | ui->ui_flags & DMC_NET); |
| 325 | goto setup; |
| 326 | } |
| 327 | m = if_rubaget(&sc->sc_ifuba, len, 0); |
| 328 | if (m == 0) |
| 329 | goto setup; |
| 330 | if (IF_QFULL(inq)) { |
| 331 | IF_DROP(inq); |
| 332 | (void) m_freem(m); |
| 333 | } else |
| 334 | IF_ENQUEUE(inq, m); |
| 335 | |
| 336 | setup: |
| 337 | arg = sc->sc_ifuba.ifu_r.ifrw_info & 0x3ffff; |
| 338 | dmcload(sc, DMC_READ, arg, ((arg >> 2) & DMC_XMEM) | DMCMTU); |
| 339 | return; |
| 340 | |
| 341 | case DMC_OUX: |
| 342 | /* |
| 343 | * A write has completed, start another |
| 344 | * transfer if there is more data to send. |
| 345 | */ |
| 346 | if (sc->sc_oactive == 0) |
| 347 | return; /* SHOULD IT BE A FATAL ERROR? */ |
| 348 | printd(" write done\n"); |
| 349 | sc->sc_if.if_opackets++; |
| 350 | sc->sc_oactive = 0; |
| 351 | if (sc->sc_ifuba.ifu_xtofree) { |
| 352 | (void) m_freem(sc->sc_ifuba.ifu_xtofree); |
| 353 | sc->sc_ifuba.ifu_xtofree = 0; |
| 354 | } |
| 355 | if (sc->sc_if.if_snd.ifq_head == 0) |
| 356 | return; |
| 357 | dmcstart(unit); |
| 358 | return; |
| 359 | |
| 360 | case DMC_CNTLO: |
| 361 | arg &= DMC_CNTMASK; |
| 362 | if (arg&DMC_FATAL) { |
| 363 | addr->bsel1 = DMC_MCLR; |
| 364 | sc->sc_flag &= ~DMCRUN; |
| 365 | /*** DO SOMETHING TO RESTART DEVICE ***/ |
| 366 | printf("DMC FATAL ERROR 0%o\n", arg); |
| 367 | } else { |
| 368 | /* ACCUMULATE STATISTICS */ |
| 369 | printf("DMC SOFT ERROR 0%o\n", arg); |
| 370 | } |
| 371 | return; |
| 372 | |
| 373 | default: |
| 374 | printf("dmc%d: bad control %o\n", unit, cmd); |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * DMC output routine. |
| 380 | * Just send the data, header was supplied by |
| 381 | * upper level protocol routines. |
| 382 | */ |
| 383 | dmcoutput(ifp, m, pf) |
| 384 | register struct ifnet *ifp; |
| 385 | register struct mbuf *m; |
| 386 | int pf; |
| 387 | { |
| 388 | struct uba_device *ui = dmcinfo[ifp->if_unit]; |
| 389 | int s; |
| 390 | |
| 391 | printd("dmcoutput\n"); |
| 392 | if (pf != (ui->ui_flags & DMC_PF)) { |
| 393 | printf("dmc%d: protocol %d not supported\n", ifp->if_unit, pf); |
| 394 | (void) m_freem(m); |
| 395 | return (0); |
| 396 | } |
| 397 | s = splimp(); |
| 398 | if (IF_QFULL(&ifp->if_snd)) { |
| 399 | IF_DROP(&ifp->if_snd); |
| 400 | (void) m_freem(m); |
| 401 | splx(s); |
| 402 | return (0); |
| 403 | } |
| 404 | IF_ENQUEUE(&ifp->if_snd, m); |
| 405 | if (dmc_softc[ifp->if_unit].sc_oactive == 0) |
| 406 | dmcstart(ifp->if_unit); |
| 407 | splx(s); |
| 408 | return (1); |
| 409 | } |