1: /* @(#)if_qe.c 7.1 (Berkeley) 6/5/86 */ 2: 3: /* from @(#)if_qe.c 1.15 (ULTRIX) 4/16/86 */ 4: 5: 6: /**************************************************************** 7: * * 8: * Licensed from Digital Equipment Corporation * 9: * Copyright (c) * 10: * Digital Equipment Corporation * 11: * Maynard, Massachusetts * 12: * 1985, 1986 * 13: * All rights reserved. * 14: * * 15: * The Information in this software is subject to change * 16: * without notice and should not be construed as a commitment * 17: * by Digital Equipment Corporation. Digital makes no * 18: * representations about the suitability of this software for * 19: * any purpose. It is supplied "As Is" without expressed or * 20: * implied warranty. * 21: * * 22: * If the Regents of the University of California or its * 23: * licensees modify the software in a manner creating * 24: * derivative copyright rights, appropriate copyright * 25: * legends may be placed on the derivative work in addition * 26: * to that set forth above. * 27: * * 28: ****************************************************************/ 29: /* --------------------------------------------------------------------- 30: * Modification History 31: * 32: * 15-Apr-86 -- afd 33: * Rename "unused_multi" to "qunused_multi" for extending Generic 34: * kernel to MicroVAXen. 35: * 36: * 18-mar-86 -- jaw br/cvec changed to NOT use registers. 37: * 38: * 12 March 86 -- Jeff Chase 39: * Modified to handle the new MCLGET macro 40: * Changed if_qe_data.c to use more receive buffers 41: * Added a flag to poke with adb to log qe_restarts on console 42: * 43: * 19 Oct 85 -- rjl 44: * Changed the watch dog timer from 30 seconds to 3. VMS is using 45: * less than 1 second in their's. Also turned the printf into an 46: * mprintf. 47: * 48: * 09/16/85 -- Larry Cohen 49: * Add 43bsd alpha tape changes for subnet routing 50: * 51: * 1 Aug 85 -- rjl 52: * Panic on a non-existent memory interrupt and the case where a packet 53: * was chained. The first should never happen because non-existant 54: * memory interrupts cause a bus reset. The second should never happen 55: * because we hang 2k input buffers on the device. 56: * 57: * 1 Aug 85 -- rich 58: * Fixed the broadcast loopback code to handle Clusters without 59: * wedging the system. 60: * 61: * 27 Feb. 85 -- ejf 62: * Return default hardware address on ioctl request. 63: * 64: * 12 Feb. 85 -- ejf 65: * Added internal extended loopback capability. 66: * 67: * 27 Dec. 84 -- rjl 68: * Fixed bug that caused every other transmit descriptor to be used 69: * instead of every descriptor. 70: * 71: * 21 Dec. 84 -- rjl 72: * Added watchdog timer to mask hardware bug that causes device lockup. 73: * 74: * 18 Dec. 84 -- rjl 75: * Reworked driver to use q-bus mapping routines. MicroVAX-I now does 76: * copying instead of m-buf shuffleing. 77: * A number of deficencies in the hardware/firmware were compensated 78: * for. See comments in qestart and qerint. 79: * 80: * 14 Nov. 84 -- jf 81: * Added usage counts for multicast addresses. 82: * Updated general protocol support to allow access to the Ethernet 83: * header. 84: * 85: * 04 Oct. 84 -- jf 86: * Added support for new ioctls to add and delete multicast addresses 87: * and set the physical address. 88: * Add support for general protocols. 89: * 90: * 14 Aug. 84 -- rjl 91: * Integrated Shannon changes. (allow arp above 1024 and ? ) 92: * 93: * 13 Feb. 84 -- rjl 94: * 95: * Initial version of driver. derived from IL driver. 96: * 97: * --------------------------------------------------------------------- 98: */ 99: 100: #include "qe.h" 101: #if NQE > 0 102: /* 103: * Digital Q-BUS to NI Adapter 104: */ 105: #include "../machine/pte.h" 106: 107: #include "param.h" 108: #include "systm.h" 109: #include "mbuf.h" 110: #include "buf.h" 111: #include "protosw.h" 112: #include "socket.h" 113: #include "vmmac.h" 114: #include "ioctl.h" 115: #include "errno.h" 116: #include "syslog.h" 117: #include "time.h" 118: #include "kernel.h" 119: 120: #include "../net/if.h" 121: #include "../net/netisr.h" 122: #include "../net/route.h" 123: 124: #ifdef INET 125: #include "../netinet/in.h" 126: #include "../netinet/in_systm.h" 127: #include "../netinet/in_var.h" 128: #include "../netinet/ip.h" 129: #include "../netinet/if_ether.h" 130: #endif 131: 132: #ifdef NS 133: #include "../netns/ns.h" 134: #include "../netns/ns_if.h" 135: #endif 136: 137: #include "../vax/cpu.h" 138: #include "../vax/mtpr.h" 139: #include "if_qereg.h" 140: #include "if_uba.h" 141: #include "../vaxuba/ubareg.h" 142: #include "../vaxuba/ubavar.h" 143: 144: #define NRCV 25 /* Receive descriptors */ 145: #define NXMT 5 /* Transmit descriptors */ 146: #define NTOT (NXMT + NRCV) 147: 148: /* 149: * This constant should really be 60 because the qna adds 4 bytes of crc. 150: * However when set to 60 our packets are ignored by deuna's , 3coms are 151: * okay ?????????????????????????????????????????? 152: */ 153: #define MINDATA 64 154: 155: /* 156: * Ethernet software status per interface. 157: * 158: * Each interface is referenced by a network interface structure, 159: * is_if, which the routing code uses to locate the interface. 160: * This structure contains the output queue for the interface, its address, ... 161: */ 162: struct qe_softc { 163: struct arpcom is_ac; /* Ethernet common part */ 164: #define is_if is_ac.ac_if /* network-visible interface */ 165: #define is_addr is_ac.ac_enaddr /* hardware Ethernet address */ 166: struct ifubinfo qe_uba; /* Q-bus resources */ 167: struct ifrw qe_ifr[NRCV]; /* for receive buffers; */ 168: struct ifxmt qe_ifw[NXMT]; /* for xmit buffers; */ 169: int qe_flags; /* software state */ 170: #define QEF_RUNNING 0x01 171: #define QEF_SETADDR 0x02 172: int setupaddr; /* mapping info for setup pkts */ 173: struct qe_ring *rringaddr; /* mapping info for rings */ 174: struct qe_ring *tringaddr; /* "" */ 175: struct qe_ring rring[NRCV+1]; /* Receive ring descriptors */ 176: struct qe_ring tring[NXMT+1]; /* Transmit ring descriptors */ 177: u_char setup_pkt[16][8]; /* Setup packet */ 178: int rindex; /* Receive index */ 179: int tindex; /* Transmit index */ 180: int otindex; /* Old transmit index */ 181: int qe_intvec; /* Interrupt vector */ 182: struct qedevice *addr; /* device addr */ 183: int setupqueued; /* setup packet queued */ 184: int nxmit; /* Transmits in progress */ 185: int timeout; /* watchdog */ 186: int qe_restarts; /* timeouts */ 187: } qe_softc[NQE]; 188: 189: struct uba_device *qeinfo[NQE]; 190: 191: extern struct timeval time; 192: extern timeout(); 193: 194: int qeprobe(), qeattach(), qeintr(), qewatch(); 195: int qeinit(),qeoutput(),qeioctl(),qereset(),qewatch(); 196: 197: u_short qestd[] = { 0 }; 198: struct uba_driver qedriver = 199: { qeprobe, 0, qeattach, 0, qestd, "qe", qeinfo }; 200: 201: #define QE_TIMEO (15) 202: #define QEUNIT(x) minor(x) 203: static int mask = 0x3ffff; /* address mask */ 204: int qewatchrun = 0; /* watchdog running */ 205: /* 206: * The deqna shouldn't receive more than ETHERMTU + sizeof(struct ether_header) 207: * but will actually take in up to 2048 bytes. To guard against the receiver 208: * chaining buffers (which we aren't prepared to handle) we allocate 2kb 209: * size buffers. 210: */ 211: #define MAXPACKETSIZE 2048 /* Should really be ETHERMTU */ 212: /* 213: * Probe the QNA to see if it's there 214: */ 215: qeprobe(reg) 216: caddr_t reg; 217: { 218: register int br, cvec; /* r11, r10 value-result */ 219: register struct qedevice *addr = (struct qedevice *)reg; 220: register struct qe_ring *rp; 221: register struct qe_ring *prp; /* physical rp */ 222: register int i, j; 223: static int next=0; /* softc index */ 224: register struct qe_softc *sc = &qe_softc[next++]; 225: 226: #ifdef lint 227: br = 0; cvec = br; br = cvec; 228: qeintr(0); 229: #endif 230: /* 231: * Set the address mask for the particular cpu 232: */ 233: mask = 0x3ffff; 234: 235: /* 236: * The QNA interrupts on i/o operations. To do an I/O operation 237: * we have to setup the interface by transmitting a setup packet. 238: */ 239: addr->qe_csr = QE_RESET; 240: addr->qe_vector = (uba_hd[numuba].uh_lastiv -= 4); 241: 242: /* 243: * Map the communications area and the setup packet. 244: */ 245: sc->setupaddr = 246: uballoc(0, (caddr_t)sc->setup_pkt, sizeof(sc->setup_pkt), 0); 247: sc->rringaddr = (struct qe_ring *) uballoc(0, (caddr_t)sc->rring, 248: sizeof(struct qe_ring) * (NTOT+2), 0); 249: prp = (struct qe_ring *)((int)sc->rringaddr & mask); 250: 251: /* 252: * The QNA will loop the setup packet back to the receive ring 253: * for verification, therefore we initialize the first 254: * receive & transmit ring descriptors and link the setup packet 255: * to them. 256: */ 257: qeinitdesc(sc->tring, (caddr_t)(sc->setupaddr & mask), 258: sizeof(sc->setup_pkt)); 259: qeinitdesc(sc->rring, (caddr_t)(sc->setupaddr & mask), 260: sizeof(sc->setup_pkt)); 261: 262: rp = (struct qe_ring *)sc->tring; 263: rp->qe_setup = 1; 264: rp->qe_eomsg = 1; 265: rp->qe_flag = rp->qe_status1 = QE_NOTYET; 266: rp->qe_valid = 1; 267: 268: rp = (struct qe_ring *)sc->rring; 269: rp->qe_flag = rp->qe_status1 = QE_NOTYET; 270: rp->qe_valid = 1; 271: 272: /* 273: * Get the addr off of the interface and place it into the setup 274: * packet. This code looks strange due to the fact that the address 275: * is placed in the setup packet in col. major order. 276: */ 277: for( i = 0 ; i < 6 ; i++ ) 278: sc->setup_pkt[i][1] = addr->qe_sta_addr[i]; 279: 280: qesetup( sc ); 281: /* 282: * Start the interface and wait for the packet. 283: */ 284: j = cvec; 285: addr->qe_csr = QE_INT_ENABLE | QE_XMIT_INT | QE_RCV_INT; 286: addr->qe_rcvlist_lo = (short)prp; 287: addr->qe_rcvlist_hi = (short)((int)prp >> 16); 288: prp += NRCV+1; 289: addr->qe_xmtlist_lo = (short)prp; 290: addr->qe_xmtlist_hi = (short)((int)prp >> 16); 291: DELAY(10000); 292: /* 293: * All done with the bus resources. 294: */ 295: ubarelse(0, &sc->setupaddr); 296: ubarelse(0, (int *)&sc->rringaddr); 297: if( cvec == j ) 298: return 0; /* didn't interrupt */ 299: 300: return( sizeof(struct qedevice) ); 301: } 302: 303: /* 304: * Interface exists: make available by filling in network interface 305: * record. System will initialize the interface when it is ready 306: * to accept packets. 307: */ 308: qeattach(ui) 309: struct uba_device *ui; 310: { 311: register struct qe_softc *sc = &qe_softc[ui->ui_unit]; 312: register struct ifnet *ifp = &sc->is_if; 313: register struct qedevice *addr = (struct qedevice *)ui->ui_addr; 314: register int i; 315: 316: ifp->if_unit = ui->ui_unit; 317: ifp->if_name = "qe"; 318: ifp->if_mtu = ETHERMTU; 319: ifp->if_flags = IFF_BROADCAST; 320: 321: /* 322: * Read the address from the prom and save it. 323: */ 324: for( i=0 ; i<6 ; i++ ) 325: sc->setup_pkt[i][1] = sc->is_addr[i] = addr->qe_sta_addr[i] & 0xff; 326: 327: /* 328: * Save the vector for initialization at reset time. 329: */ 330: sc->qe_intvec = addr->qe_vector; 331: 332: ifp->if_init = qeinit; 333: ifp->if_output = qeoutput; 334: ifp->if_ioctl = qeioctl; 335: ifp->if_reset = qereset; 336: sc->qe_uba.iff_flags = UBA_CANTWAIT; 337: if_attach(ifp); 338: } 339: 340: /* 341: * Reset of interface after UNIBUS reset. 342: * If interface is on specified uba, reset its state. 343: */ 344: qereset(unit, uban) 345: int unit, uban; 346: { 347: register struct uba_device *ui; 348: 349: if (unit >= NQE || (ui = qeinfo[unit]) == 0 || ui->ui_alive == 0 || 350: ui->ui_ubanum != uban) 351: return; 352: printf(" qe%d", unit); 353: qe_softc[unit].is_if.if_flags &= ~IFF_RUNNING; 354: qeinit(unit); 355: } 356: 357: /* 358: * Initialization of interface. 359: */ 360: qeinit(unit) 361: int unit; 362: { 363: register struct qe_softc *sc = &qe_softc[unit]; 364: register struct uba_device *ui = qeinfo[unit]; 365: register struct qedevice *addr = (struct qedevice *)ui->ui_addr; 366: register struct ifnet *ifp = &sc->is_if; 367: register i; 368: int s; 369: 370: /* address not known */ 371: if (ifp->if_addrlist == (struct ifaddr *)0) 372: return; 373: if (sc->qe_flags & QEF_RUNNING) 374: return; 375: 376: if ((ifp->if_flags & IFF_RUNNING) == 0) { 377: /* 378: * map the communications area onto the device 379: */ 380: sc->rringaddr = (struct qe_ring *) 381: ((int) uballoc(0, (caddr_t)sc->rring, 382: sizeof(struct qe_ring) * (NTOT+2), 0) & mask); 383: sc->tringaddr = sc->rringaddr + NRCV + 1; 384: sc->setupaddr = uballoc(0, (caddr_t)sc->setup_pkt, 385: sizeof(sc->setup_pkt), 0) & mask; 386: /* 387: * init buffers and maps 388: */ 389: if (if_ubaminit(&sc->qe_uba, ui->ui_ubanum, 390: sizeof (struct ether_header), (int)btoc(MAXPACKETSIZE), 391: sc->qe_ifr, NRCV, sc->qe_ifw, NXMT) == 0) { 392: printf("qe%d: can't initialize\n", unit); 393: sc->is_if.if_flags &= ~IFF_UP; 394: return; 395: } 396: } 397: /* 398: * Init the buffer descriptors and indexes for each of the lists and 399: * loop them back to form a ring. 400: */ 401: for (i = 0; i < NRCV; i++) { 402: qeinitdesc( &sc->rring[i], 403: (caddr_t)(sc->qe_ifr[i].ifrw_info & mask), MAXPACKETSIZE); 404: sc->rring[i].qe_flag = sc->rring[i].qe_status1 = QE_NOTYET; 405: sc->rring[i].qe_valid = 1; 406: } 407: qeinitdesc(&sc->rring[i], (caddr_t)NULL, 0); 408: 409: sc->rring[i].qe_addr_lo = (short)sc->rringaddr; 410: sc->rring[i].qe_addr_hi = (short)((int)sc->rringaddr >> 16); 411: sc->rring[i].qe_chain = 1; 412: sc->rring[i].qe_flag = sc->rring[i].qe_status1 = QE_NOTYET; 413: sc->rring[i].qe_valid = 1; 414: 415: for( i = 0 ; i <= NXMT ; i++ ) 416: qeinitdesc(&sc->tring[i], (caddr_t)NULL, 0); 417: i--; 418: 419: sc->tring[i].qe_addr_lo = (short)sc->tringaddr; 420: sc->tring[i].qe_addr_hi = (short)((int)sc->tringaddr >> 16); 421: sc->tring[i].qe_chain = 1; 422: sc->tring[i].qe_flag = sc->tring[i].qe_status1 = QE_NOTYET; 423: sc->tring[i].qe_valid = 1; 424: 425: sc->nxmit = sc->otindex = sc->tindex = sc->rindex = 0; 426: 427: /* 428: * Take the interface out of reset, program the vector, 429: * enable interrupts, and tell the world we are up. 430: */ 431: s = splimp(); 432: addr->qe_vector = sc->qe_intvec; 433: sc->addr = addr; 434: addr->qe_csr = QE_RCV_ENABLE | QE_INT_ENABLE | QE_XMIT_INT | 435: QE_RCV_INT | QE_ILOOP; 436: addr->qe_rcvlist_lo = (short)sc->rringaddr; 437: addr->qe_rcvlist_hi = (short)((int)sc->rringaddr >> 16); 438: ifp->if_flags |= IFF_UP | IFF_RUNNING; 439: sc->qe_flags |= QEF_RUNNING; 440: qesetup( sc ); 441: qestart( unit ); 442: splx( s ); 443: 444: } 445: 446: /* 447: * Start output on interface. 448: * 449: */ 450: qestart(dev) 451: dev_t dev; 452: { 453: int unit = QEUNIT(dev); 454: struct uba_device *ui = qeinfo[unit]; 455: register struct qe_softc *sc = &qe_softc[unit]; 456: register struct qedevice *addr; 457: register struct qe_ring *rp; 458: register index; 459: struct mbuf *m; 460: int buf_addr, len, s; 461: 462: 463: s = splimp(); 464: addr = (struct qedevice *)ui->ui_addr; 465: /* 466: * The deqna doesn't look at anything but the valid bit 467: * to determine if it should transmit this packet. If you have 468: * a ring and fill it the device will loop indefinately on the 469: * packet and continue to flood the net with packets until you 470: * break the ring. For this reason we never queue more than n-1 471: * packets in the transmit ring. 472: * 473: * The microcoders should have obeyed their own defination of the 474: * flag and status words, but instead we have to compensate. 475: */ 476: for( index = sc->tindex; 477: sc->tring[index].qe_valid == 0 && sc->nxmit < (NXMT-1) ; 478: sc->tindex = index = ++index % NXMT){ 479: rp = &sc->tring[index]; 480: if( sc->setupqueued ) { 481: buf_addr = sc->setupaddr; 482: len = 128; 483: rp->qe_setup = 1; 484: sc->setupqueued = 0; 485: } else { 486: IF_DEQUEUE(&sc->is_if.if_snd, m); 487: if( m == 0 ){ 488: splx(s); 489: return; 490: } 491: buf_addr = sc->qe_ifw[index].ifw_info; 492: len = if_ubaput(&sc->qe_uba, &sc->qe_ifw[index], m); 493: } 494: /* 495: * Does buffer end on odd byte ? 496: */ 497: if( len & 1 ) { 498: len++; 499: rp->qe_odd_end = 1; 500: } 501: if( len < MINDATA ) 502: len = MINDATA; 503: rp->qe_buf_len = -(len/2); 504: buf_addr &= mask; 505: rp->qe_flag = rp->qe_status1 = QE_NOTYET; 506: rp->qe_addr_lo = (short)buf_addr; 507: rp->qe_addr_hi = (short)(buf_addr >> 16); 508: rp->qe_eomsg = 1; 509: rp->qe_flag = rp->qe_status1 = QE_NOTYET; 510: rp->qe_valid = 1; 511: sc->nxmit++; 512: /* 513: * If the watchdog time isn't running kick it. 514: */ 515: sc->timeout=1; 516: if (qewatchrun == 0) { 517: qewatchrun++; 518: timeout(qewatch, (caddr_t)0, QE_TIMEO); 519: } 520: 521: /* 522: * See if the xmit list is invalid. 523: */ 524: if( addr->qe_csr & QE_XL_INVALID ) { 525: buf_addr = (int)(sc->tringaddr+index); 526: addr->qe_xmtlist_lo = (short)buf_addr; 527: addr->qe_xmtlist_hi = (short)(buf_addr >> 16); 528: } 529: } 530: splx( s ); 531: } 532: 533: /* 534: * Ethernet interface interrupt processor 535: */ 536: qeintr(unit) 537: int unit; 538: { 539: register struct qe_softc *sc = &qe_softc[unit]; 540: struct qedevice *addr = (struct qedevice *)qeinfo[unit]->ui_addr; 541: int s, buf_addr, csr; 542: 543: s = splimp(); 544: csr = addr->qe_csr; 545: addr->qe_csr = QE_RCV_ENABLE | QE_INT_ENABLE | QE_XMIT_INT | QE_RCV_INT | QE_ILOOP; 546: if( csr & QE_RCV_INT ) 547: qerint( unit ); 548: if( csr & QE_XMIT_INT ) 549: qetint( unit ); 550: if( csr & QE_NEX_MEM_INT ) 551: panic("qe: Non existant memory interrupt"); 552: 553: if( addr->qe_csr & QE_RL_INVALID && sc->rring[sc->rindex].qe_status1 == QE_NOTYET ) { 554: buf_addr = (int)&sc->rringaddr[sc->rindex]; 555: addr->qe_rcvlist_lo = (short)buf_addr; 556: addr->qe_rcvlist_hi = (short)(buf_addr >> 16); 557: } 558: splx( s ); 559: } 560: 561: /* 562: * Ethernet interface transmit interrupt. 563: */ 564: 565: qetint(unit) 566: int unit; 567: { 568: register struct qe_softc *sc = &qe_softc[unit]; 569: register struct qe_ring *rp; 570: register struct ifxmt *ifxp; 571: int status1, setupflag; 572: short len; 573: 574: 575: while( sc->otindex != sc->tindex && sc->tring[sc->otindex].qe_status1 != QE_NOTYET && sc->nxmit > 0 ) { 576: /* 577: * Save the status words from the descriptor so that it can 578: * be released. 579: */ 580: rp = &sc->tring[sc->otindex]; 581: status1 = rp->qe_status1; 582: setupflag = rp->qe_setup; 583: len = (-rp->qe_buf_len) * 2; 584: if( rp->qe_odd_end ) 585: len++; 586: /* 587: * Init the buffer descriptor 588: */ 589: bzero((caddr_t)rp, sizeof(struct qe_ring)); 590: if( --sc->nxmit == 0 ) 591: sc->timeout = 0; 592: if( !setupflag ) { 593: /* 594: * Do some statistics. 595: */ 596: sc->is_if.if_opackets++; 597: sc->is_if.if_collisions += ( status1 & QE_CCNT ) >> 4; 598: if (status1 & QE_ERROR) 599: sc->is_if.if_oerrors++; 600: /* 601: * If this was a broadcast packet loop it 602: * back because the hardware can't hear its own 603: * transmits. 604: */ 605: ifxp = &sc->qe_ifw[sc->otindex]; 606: if (bcmp((caddr_t)ifxp->ifw_addr, 607: (caddr_t)etherbroadcastaddr, 608: sizeof(etherbroadcastaddr)) == 0) 609: qeread(sc, &ifxp->ifrw, len); 610: if (ifxp->ifw_xtofree) { 611: m_freem(ifxp->ifw_xtofree); 612: ifxp->ifw_xtofree = 0; 613: } 614: } 615: sc->otindex = ++sc->otindex % NXMT; 616: } 617: qestart( unit ); 618: } 619: 620: /* 621: * Ethernet interface receiver interrupt. 622: * If can't determine length from type, then have to drop packet. 623: * Othewise decapsulate packet based on type and pass to type specific 624: * higher-level input routine. 625: */ 626: qerint(unit) 627: int unit; 628: { 629: register struct qe_softc *sc = &qe_softc[unit]; 630: register struct qe_ring *rp; 631: int len, status1, status2; 632: int bufaddr; 633: 634: /* 635: * Traverse the receive ring looking for packets to pass back. 636: * The search is complete when we find a descriptor not in use. 637: * 638: * As in the transmit case the deqna doesn't honor it's own protocols 639: * so there exists the possibility that the device can beat us around 640: * the ring. The proper way to guard against this is to insure that 641: * there is always at least one invalid descriptor. We chose instead 642: * to make the ring large enough to minimize the problem. With a ring 643: * size of 4 we haven't been able to see the problem. To be safe we 644: * doubled that to 8. 645: * 646: */ 647: for( ; sc->rring[sc->rindex].qe_status1 != QE_NOTYET ; sc->rindex = ++sc->rindex % NRCV ){ 648: rp = &sc->rring[sc->rindex]; 649: status1 = rp->qe_status1; 650: status2 = rp->qe_status2; 651: bzero((caddr_t)rp, sizeof(struct qe_ring)); 652: if( (status1 & QE_MASK) == QE_MASK ) 653: panic("qe: chained packet"); 654: len = ((status1 & QE_RBL_HI) | (status2 & QE_RBL_LO)) + 60; 655: sc->is_if.if_ipackets++; 656: 657: if (status1 & QE_ERROR) 658: sc->is_if.if_ierrors++; 659: else { 660: /* 661: * We don't process setup packets. 662: */ 663: if( !(status1 & QE_ESETUP) ) 664: qeread(sc, &sc->qe_ifr[sc->rindex], 665: len - sizeof(struct ether_header)); 666: } 667: /* 668: * Return the buffer to the ring 669: */ 670: bufaddr = (int)sc->qe_ifr[sc->rindex].ifrw_info & mask; 671: rp->qe_buf_len = -((MAXPACKETSIZE)/2); 672: rp->qe_addr_lo = (short)bufaddr; 673: rp->qe_addr_hi = (short)((int)bufaddr >> 16); 674: rp->qe_flag = rp->qe_status1 = QE_NOTYET; 675: rp->qe_valid = 1; 676: } 677: } 678: /* 679: * Ethernet output routine. 680: * Encapsulate a packet of type family for the local net. 681: * Use trailer local net encapsulation if enough data in first 682: * packet leaves a multiple of 512 bytes of data in remainder. 683: */ 684: qeoutput(ifp, m0, dst) 685: struct ifnet *ifp; 686: struct mbuf *m0; 687: struct sockaddr *dst; 688: { 689: int type, s, error; 690: u_char edst[6]; 691: struct in_addr idst; 692: register struct qe_softc *is = &qe_softc[ifp->if_unit]; 693: register struct mbuf *m = m0; 694: register struct ether_header *eh; 695: register int off; 696: int usetrailers; 697: 698: if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) { 699: error = ENETDOWN; 700: goto bad; 701: } 702: 703: switch (dst->sa_family) { 704: 705: #ifdef INET 706: case AF_INET: 707: idst = ((struct sockaddr_in *)dst)->sin_addr; 708: if (!arpresolve(&is->is_ac, m, &idst, edst, &usetrailers)) 709: return (0); /* if not yet resolved */ 710: off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; 711: if (usetrailers && off > 0 && (off & 0x1ff) == 0 && 712: m->m_off >= MMINOFF + 2 * sizeof (u_short)) { 713: type = ETHERTYPE_TRAIL + (off>>9); 714: m->m_off -= 2 * sizeof (u_short); 715: m->m_len += 2 * sizeof (u_short); 716: *mtod(m, u_short *) = htons((u_short)ETHERTYPE_IP); 717: *(mtod(m, u_short *) + 1) = htons((u_short)m->m_len); 718: goto gottrailertype; 719: } 720: type = ETHERTYPE_IP; 721: off = 0; 722: goto gottype; 723: #endif 724: #ifdef NS 725: case AF_NS: 726: type = ETHERTYPE_NS; 727: bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 728: (caddr_t)edst, sizeof (edst)); 729: off = 0; 730: goto gottype; 731: #endif 732: 733: 734: case AF_UNSPEC: 735: eh = (struct ether_header *)dst->sa_data; 736: bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 737: type = eh->ether_type; 738: goto gottype; 739: 740: default: 741: printf("qe%d: can't handle af%d\n", ifp->if_unit, 742: dst->sa_family); 743: error = EAFNOSUPPORT; 744: goto bad; 745: } 746: 747: gottrailertype: 748: /* 749: * Packet to be sent as trailer: move first packet 750: * (control information) to end of chain. 751: */ 752: while (m->m_next) 753: m = m->m_next; 754: m->m_next = m0; 755: m = m0->m_next; 756: m0->m_next = 0; 757: m0 = m; 758: 759: gottype: 760: /* 761: * Add local net header. If no space in first mbuf, 762: * allocate another. 763: */ 764: if (m->m_off > MMAXOFF || 765: MMINOFF + sizeof (struct ether_header) > m->m_off) { 766: m = m_get(M_DONTWAIT, MT_HEADER); 767: if (m == 0) { 768: error = ENOBUFS; 769: goto bad; 770: } 771: m->m_next = m0; 772: m->m_off = MMINOFF; 773: m->m_len = sizeof (struct ether_header); 774: } else { 775: m->m_off -= sizeof (struct ether_header); 776: m->m_len += sizeof (struct ether_header); 777: } 778: eh = mtod(m, struct ether_header *); 779: eh->ether_type = htons((u_short)type); 780: bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 781: bcopy((caddr_t)is->is_addr, (caddr_t)eh->ether_shost, sizeof (is->is_addr)); 782: 783: /* 784: * Queue message on interface, and start output if interface 785: * not yet active. 786: */ 787: s = splimp(); 788: if (IF_QFULL(&ifp->if_snd)) { 789: IF_DROP(&ifp->if_snd); 790: splx(s); 791: m_freem(m); 792: return (ENOBUFS); 793: } 794: IF_ENQUEUE(&ifp->if_snd, m); 795: qestart(ifp->if_unit); 796: splx(s); 797: return (0); 798: 799: bad: 800: m_freem(m0); 801: return (error); 802: } 803: 804: 805: /* 806: * Process an ioctl request. 807: */ 808: qeioctl(ifp, cmd, data) 809: register struct ifnet *ifp; 810: int cmd; 811: caddr_t data; 812: { 813: struct qe_softc *sc = &qe_softc[ifp->if_unit]; 814: struct ifaddr *ifa = (struct ifaddr *)data; 815: int s = splimp(), error = 0; 816: 817: switch (cmd) { 818: 819: case SIOCSIFADDR: 820: ifp->if_flags |= IFF_UP; 821: qeinit(ifp->if_unit); 822: switch(ifa->ifa_addr.sa_family) { 823: #ifdef INET 824: case AF_INET: 825: ((struct arpcom *)ifp)->ac_ipaddr = 826: IA_SIN(ifa)->sin_addr; 827: arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr); 828: break; 829: #endif 830: #ifdef NS 831: case AF_NS: 832: { 833: register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); 834: 835: if (ns_nullhost(*ina)) 836: ina->x_host = *(union ns_host *)(sc->is_addr); 837: else 838: qe_setaddr(ina->x_host.c_host, ifp->if_unit); 839: break; 840: } 841: #endif 842: } 843: break; 844: 845: case SIOCSIFFLAGS: 846: if ((ifp->if_flags & IFF_UP) == 0 && 847: sc->qe_flags & QEF_RUNNING) { 848: ((struct qedevice *) 849: (qeinfo[ifp->if_unit]->ui_addr))->qe_csr = QE_RESET; 850: sc->qe_flags &= ~QEF_RUNNING; 851: } else if (ifp->if_flags & IFF_UP && 852: (sc->qe_flags & QEF_RUNNING) == 0) 853: qerestart(sc); 854: break; 855: 856: default: 857: error = EINVAL; 858: 859: } 860: splx(s); 861: return (error); 862: } 863: 864: /* 865: * set ethernet address for unit 866: */ 867: qe_setaddr(physaddr, unit) 868: u_char *physaddr; 869: int unit; 870: { 871: register struct qe_softc *sc = &qe_softc[unit]; 872: register int i; 873: 874: for (i = 0; i < 6; i++) 875: sc->setup_pkt[i][1] = sc->is_addr[i] = physaddr[i]; 876: sc->qe_flags |= QEF_SETADDR; 877: if (sc->is_if.if_flags & IFF_RUNNING) 878: qesetup(sc); 879: qeinit(unit); 880: } 881: 882: 883: /* 884: * Initialize a ring descriptor with mbuf allocation side effects 885: */ 886: qeinitdesc(rp, addr, len) 887: register struct qe_ring *rp; 888: caddr_t addr; /* mapped address */ 889: int len; 890: { 891: /* 892: * clear the entire descriptor 893: */ 894: bzero((caddr_t)rp, sizeof(struct qe_ring)); 895: 896: if( len ) { 897: rp->qe_buf_len = -(len/2); 898: rp->qe_addr_lo = (short)addr; 899: rp->qe_addr_hi = (short)((int)addr >> 16); 900: } 901: } 902: /* 903: * Build a setup packet - the physical address will already be present 904: * in first column. 905: */ 906: qesetup( sc ) 907: struct qe_softc *sc; 908: { 909: register i, j; 910: 911: /* 912: * Copy the target address to the rest of the entries in this row. 913: */ 914: for ( j = 0; j < 6 ; j++ ) 915: for ( i = 2 ; i < 8 ; i++ ) 916: sc->setup_pkt[j][i] = sc->setup_pkt[j][1]; 917: /* 918: * Duplicate the first half. 919: */ 920: bcopy((caddr_t)sc->setup_pkt[0], (caddr_t)sc->setup_pkt[8], 64); 921: /* 922: * Fill in the broadcast address. 923: */ 924: for ( i = 0; i < 6 ; i++ ) 925: sc->setup_pkt[i][2] = 0xff; 926: sc->setupqueued++; 927: } 928: 929: /* 930: * Pass a packet to the higher levels. 931: * We deal with the trailer protocol here. 932: */ 933: qeread(sc, ifrw, len) 934: register struct qe_softc *sc; 935: struct ifrw *ifrw; 936: int len; 937: { 938: struct ether_header *eh; 939: struct mbuf *m; 940: int off, resid; 941: struct ifqueue *inq; 942: 943: /* 944: * Deal with trailer protocol: if type is INET trailer 945: * get true type from first 16-bit word past data. 946: * Remember that type was trailer by setting off. 947: */ 948: 949: eh = (struct ether_header *)ifrw->ifrw_addr; 950: eh->ether_type = ntohs((u_short)eh->ether_type); 951: #define qedataaddr(eh, off, type) ((type)(((caddr_t)((eh)+1)+(off)))) 952: if (eh->ether_type >= ETHERTYPE_TRAIL && 953: eh->ether_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { 954: off = (eh->ether_type - ETHERTYPE_TRAIL) * 512; 955: if (off >= ETHERMTU) 956: return; /* sanity */ 957: eh->ether_type = ntohs(*qedataaddr(eh,off, u_short *)); 958: resid = ntohs(*(qedataaddr(eh, off+2, u_short *))); 959: if (off + resid > len) 960: return; /* sanity */ 961: len = off + resid; 962: } else 963: off = 0; 964: if (len == 0) 965: return; 966: 967: /* 968: * Pull packet off interface. Off is nonzero if packet 969: * has trailing header; qeget will then force this header 970: * information to be at the front, but we still have to drop 971: * the type and length which are at the front of any trailer data. 972: */ 973: m = if_ubaget(&sc->qe_uba, ifrw, len, off, &sc->is_if); 974: 975: if (m == 0) 976: return; 977: 978: if (off) { 979: struct ifnet *ifp; 980: 981: ifp = *(mtod(m, struct ifnet **)); 982: m->m_off += 2 * sizeof (u_short); 983: m->m_len -= 2 * sizeof (u_short); 984: *(mtod(m, struct ifnet **)) = ifp; 985: } 986: switch (eh->ether_type) { 987: 988: #ifdef INET 989: case ETHERTYPE_IP: 990: schednetisr(NETISR_IP); 991: inq = &ipintrq; 992: break; 993: 994: case ETHERTYPE_ARP: 995: arpinput(&sc->is_ac, m); 996: return; 997: #endif 998: #ifdef NS 999: case ETHERTYPE_NS: 1000: schednetisr(NETISR_NS); 1001: inq = &nsintrq; 1002: break; 1003: 1004: #endif 1005: 1006: default: 1007: m_freem(m); 1008: return; 1009: } 1010: 1011: if (IF_QFULL(inq)) { 1012: IF_DROP(inq); 1013: m_freem(m); 1014: return; 1015: } 1016: IF_ENQUEUE(inq, m); 1017: } 1018: 1019: /* 1020: * Watchdog timer routine. There is a condition in the hardware that 1021: * causes the board to lock up under heavy load. This routine detects 1022: * the hang up and restarts the device. 1023: */ 1024: qewatch() 1025: { 1026: register struct qe_softc *sc; 1027: register int i; 1028: int inprogress=0; 1029: 1030: for (i = 0; i < NQE; i++) { 1031: sc = &qe_softc[i]; 1032: if (sc->timeout) 1033: if (++sc->timeout > 3 ) { 1034: log(LOG_ERR, 1035: "qerestart: restarted qe%d %d\n", 1036: i, ++sc->qe_restarts); 1037: qerestart(sc); 1038: } else 1039: inprogress++; 1040: } 1041: if (inprogress) { 1042: timeout(qewatch, (caddr_t)0, QE_TIMEO); 1043: qewatchrun++; 1044: } else 1045: qewatchrun=0; 1046: } 1047: /* 1048: * Restart for board lockup problem. 1049: */ 1050: qerestart(sc) 1051: register struct qe_softc *sc; 1052: { 1053: register struct ifnet *ifp = &sc->is_if; 1054: register struct qedevice *addr = sc->addr; 1055: register struct qe_ring *rp; 1056: register i; 1057: 1058: addr->qe_csr = QE_RESET; 1059: sc->timeout = 0; 1060: qesetup( sc ); 1061: for (i = 0, rp = sc->tring; i < NXMT; rp++, i++) { 1062: rp->qe_flag = rp->qe_status1 = QE_NOTYET; 1063: rp->qe_valid = 0; 1064: } 1065: sc->nxmit = sc->otindex = sc->tindex = sc->rindex = 0; 1066: addr->qe_csr = QE_RCV_ENABLE | QE_INT_ENABLE | QE_XMIT_INT | 1067: QE_RCV_INT | QE_ILOOP; 1068: addr->qe_rcvlist_lo = (short)sc->rringaddr; 1069: addr->qe_rcvlist_hi = (short)((int)sc->rringaddr >> 16); 1070: sc->qe_flags |= QEF_RUNNING; 1071: qestart(ifp->if_unit); 1072: } 1073: #endif
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