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1.1 ! root 1: ! 2: /* @(#)tmscp.c 7.5 (Berkeley) 4/4/90 */ ! 3: ! 4: /**************************************************************** ! 5: * * ! 6: * Licensed from Digital Equipment Corporation * ! 7: * Copyright (c) * ! 8: * Digital Equipment Corporation * ! 9: * Maynard, Massachusetts * ! 10: * 1985, 1986 * ! 11: * All rights reserved. * ! 12: * * ! 13: * The Information in this software is subject to change * ! 14: * without notice and should not be construed as a commitment * ! 15: * by Digital Equipment Corporation. Digital makes no * ! 16: * representations about the suitability of this software for * ! 17: * any purpose. It is supplied "As Is" without expressed or * ! 18: * implied warranty. * ! 19: * * ! 20: * If the Regents of the University of California or its * ! 21: * licensees modify the software in a manner creating * ! 22: * diriviative copyright rights, appropriate copyright * ! 23: * legends may be placed on the drivative work in addition * ! 24: * to that set forth above. * ! 25: ***************************************************************/ ! 26: /* ! 27: * tmscp.c - TMSCP (TK50/TU81) standalone driver ! 28: */ ! 29: ! 30: # ifndef lint ! 31: static char *sccsid = "@(#)tmscp.c 1.5 (ULTRIX) 4/18/86"; ! 32: # endif not lint ! 33: ! 34: /* ------------------------------------------------------------------------ ! 35: * Modification History: /sys/stand/tmscp.c ! 36: * ! 37: * 3-15-85 afd ! 38: * Don't ask for an interrupt when commands are issued and ! 39: * check ownership bit in the response descriptor to detect when a ! 40: * command is complete. Necessary due to the TU81's failure to set ! 41: * the response interrupt field in the communications area. ! 42: * ! 43: * ------------------------------------------------------------------------ ! 44: */ ! 45: ! 46: #include "param.h" ! 47: ! 48: #include "../vax/pte.h" ! 49: ! 50: #include "savax.h" ! 51: #include "saio.h" ! 52: ! 53: /* ! 54: * Parameters for the communications area ! 55: * (Only 1 cmd & 1 rsp packet) ! 56: */ ! 57: #define NRSPL2 0 ! 58: #define NCMDL2 0 ! 59: #define NRSP (1<<NRSPL2) ! 60: #define NCMD (1<<NCMDL2) ! 61: ! 62: #include "../vaxuba/tmscpreg.h" ! 63: #include "../vaxuba/ubareg.h" ! 64: #include "../vax/tmscp.h" ! 65: ! 66: #define MAXCTLR 1 /* all addresses must be specified */ ! 67: u_short tmscpstd[MAXCTLR] = { 0174500 }; ! 68: ! 69: struct iob ctmscpbuf; ! 70: ! 71: struct tmscpdevice *tmscpaddr = 0; ! 72: ! 73: struct tmscp { ! 74: struct tmscpca tmscp_ca; ! 75: struct mscp tmscp_rsp; ! 76: struct mscp tmscp_cmd; ! 77: } tmscp; ! 78: ! 79: struct tmscp *tmscp_ubaddr; /* Unibus address of tmscp structure */ ! 80: ! 81: struct mscp *tmscpcmd(); ! 82: ! 83: int tmscp_offline = 1; /* Flag to prevent multiple STCON */ ! 84: int tms_offline[4] = {1,1,1,1}; /* Flag to prevent multiple ONLIN */ ! 85: ! 86: /* ! 87: * Open a tmscp device. Initialize the controller and set the unit online. ! 88: */ ! 89: tmscpopen(io) ! 90: register struct iob *io; ! 91: { ! 92: register struct mscp *mp; ! 93: int i; ! 94: ! 95: if ((u_int)io->i_ctlr >= MAXCTLR) ! 96: return (ECTLR); ! 97: /* ! 98: * Have the tmscp controller characteristics already been set up ! 99: * (STCON)? ! 100: */ ! 101: if (tmscp_offline) { ! 102: if (tmscpaddr == 0) ! 103: tmscpaddr = (struct tmscpdevice *)ubamem(io->i_adapt, tmscpstd[0]); ! 104: if (tmscp_ubaddr == 0) { ! 105: ctmscpbuf = *io; ! 106: ctmscpbuf.i_ma = (caddr_t)&tmscp; ! 107: ctmscpbuf.i_cc = sizeof(tmscp); ! 108: tmscp_ubaddr = (struct tmscp *)ubasetup(&ctmscpbuf, 2); ! 109: } ! 110: /* ! 111: * Initialize the tmscp device and wait for the 4 steps ! 112: * to complete. ! 113: */ ! 114: tmscpaddr->tmscpip = 0; ! 115: while ((tmscpaddr->tmscpsa & TMSCP_STEP1) == 0); ! 116: tmscpaddr->tmscpsa =TMSCP_ERR|(NCMDL2<<11)|(NRSPL2<<8); ! 117: ! 118: while ((tmscpaddr->tmscpsa & TMSCP_STEP2) == 0); ! 119: # define STEP1MASK 0174377 ! 120: # define STEP1GOOD (TMSCP_STEP2|TMSCP_IE|(NCMDL2<<3)|NRSPL2) ! 121: if ((tmscpaddr->tmscpsa&STEP1MASK) != STEP1GOOD) ! 122: printf("tmscpopen: step 1 not successful sa=%o\n",tmscpaddr->tmscpsa&0xffff); ! 123: tmscpaddr->tmscpsa = (short)&tmscp_ubaddr->tmscp_ca.ca_ringbase; ! 124: ! 125: while ((tmscpaddr->tmscpsa & TMSCP_STEP3) == 0); ! 126: # define STEP2MASK 0174377 ! 127: # define STEP2GOOD (TMSCP_STEP3) ! 128: if ((tmscpaddr->tmscpsa&STEP2MASK) != STEP2GOOD) ! 129: printf("tmscpopen: step 2 not successful sa=%o\n",tmscpaddr->tmscpsa&0xffff); ! 130: tmscpaddr->tmscpsa = (short)(((int)&tmscp_ubaddr->tmscp_ca.ca_ringbase) >> 16); ! 131: ! 132: while ((tmscpaddr->tmscpsa & TMSCP_STEP4) == 0); ! 133: # define STEP3MASK 0174000 ! 134: # define STEP3GOOD TMSCP_STEP4 ! 135: if ((tmscpaddr->tmscpsa&STEP3MASK) != STEP3GOOD) ! 136: printf("tmscpopen: step 3 not successful sa=%o\n",tmscpaddr->tmscpsa&0xffff); ! 137: tmscpaddr->tmscpsa = TMSCP_GO; ! 138: ! 139: /* ! 140: * Init cmd & rsp area ! 141: */ ! 142: tmscp.tmscp_ca.ca_cmddsc[0] = (long)&tmscp_ubaddr->tmscp_cmd.mscp_cmdref; ! 143: tmscp.tmscp_cmd.mscp_dscptr = tmscp.tmscp_ca.ca_cmddsc; ! 144: tmscp.tmscp_cmd.mscp_header.tmscp_vcid = 1; /* for tape */ ! 145: ! 146: tmscp.tmscp_ca.ca_rspdsc[0] = (long)&tmscp_ubaddr->tmscp_rsp.mscp_cmdref; ! 147: tmscp.tmscp_rsp.mscp_dscptr = tmscp.tmscp_ca.ca_rspdsc; ! 148: tmscp.tmscp_cmd.mscp_cntflgs = 0; ! 149: if (tmscpcmd(M_OP_STCON, 0) == 0) { ! 150: printf("tms: open error, STCON\n"); ! 151: return (EIO); ! 152: } ! 153: tmscp_offline = 0; ! 154: } ! 155: tmscp.tmscp_cmd.mscp_unit = io->i_unit&03; ! 156: /* ! 157: * Has this unit been issued an ONLIN? ! 158: */ ! 159: if (tms_offline[tmscp.tmscp_cmd.mscp_unit]) { ! 160: if ((mp = tmscpcmd(M_OP_ONLIN, 0)) == 0) { ! 161: _stop("tms: open error, ONLIN\n"); ! 162: return (EIO); ! 163: } ! 164: tms_offline[tmscp.tmscp_cmd.mscp_unit] = 0; ! 165: } ! 166: /* ! 167: * This makes no sense, but I could be wrong... KB ! 168: * ! 169: * if ((u_int)io->i_part > 3) ! 170: * return (EPART); ! 171: */ ! 172: if (io->i_part) { ! 173: /* ! 174: * Skip forward the appropriate number of files on the tape. ! 175: */ ! 176: tmscp.tmscp_cmd.mscp_tmkcnt = io->i_part; ! 177: (void)tmscpcmd(M_OP_REPOS, 0); ! 178: tmscp.tmscp_cmd.mscp_tmkcnt = 0; ! 179: } ! 180: return (0); ! 181: } ! 182: ! 183: /* ! 184: * Close the device (rewind it to BOT) ! 185: */ ! 186: tmscpclose(io) ! 187: register struct iob *io; ! 188: { ! 189: (void)tmscpcmd(M_OP_REPOS, M_MD_REWND); ! 190: } ! 191: ! 192: /* ! 193: * Set up tmscp command packet. Cause the controller to poll to pick up ! 194: * the command. ! 195: */ ! 196: struct mscp * ! 197: tmscpcmd(op,mod) ! 198: int op, mod; /* opcode and modifier (usu 0) */ ! 199: { ! 200: struct mscp *mp; /* ptr to cmd packet */ ! 201: int i; /* read into to init polling */ ! 202: ! 203: tmscp.tmscp_cmd.mscp_opcode = op; ! 204: tmscp.tmscp_cmd.mscp_modifier = mod; ! 205: tmscp.tmscp_cmd.mscp_header.tmscp_msglen = mscp_msglen; ! 206: tmscp.tmscp_ca.ca_cmddsc[0] |= TMSCP_OWN; /* | TMSCP_INT */ ! 207: tmscp.tmscp_rsp.mscp_header.tmscp_msglen = mscp_msglen; ! 208: tmscp.tmscp_ca.ca_rspdsc[0] |= TMSCP_OWN; /* | TMSCP_INT */ ! 209: ! 210: i = tmscpaddr->tmscpip; ! 211: for (;;) { ! 212: if (tmscpaddr->tmscpsa & TMSCP_ERR) { ! 213: printf("tmscpcmd: Fatal error sa=%o\n", tmscpaddr->tmscpsa & 0xffff); ! 214: return(0); ! 215: } ! 216: ! 217: if (tmscp.tmscp_ca.ca_cmdint) ! 218: tmscp.tmscp_ca.ca_cmdint = 0; ! 219: /* ! 220: * This is to handle the case of devices not setting the ! 221: * interrupt field in the communications area. Some ! 222: * devices (early TU81's) only clear the ownership field ! 223: * in the Response Descriptor. ! 224: * ! 225: * ! 226: * if (tmscp.tmscp_ca.ca_rspint) ! 227: * break; ! 228: */ ! 229: if (!(tmscp.tmscp_ca.ca_rspdsc[0] & (TMSCP_OWN))) ! 230: break; ! 231: } ! 232: tmscp.tmscp_ca.ca_rspint = 0; ! 233: mp = &tmscp.tmscp_rsp; ! 234: if (mp->mscp_opcode != (op|M_OP_END) || ! 235: (mp->mscp_status&M_ST_MASK) != M_ST_SUCC) { ! 236: /* ! 237: * Detect hitting tape mark. This signifies the end of the ! 238: * tape mini-root file. We don't want to return an error ! 239: * condition to the strategy routine. ! 240: */ ! 241: if ((mp->mscp_status & M_ST_MASK) != M_ST_TAPEM) ! 242: return(0); ! 243: } ! 244: return(mp); ! 245: } ! 246: ! 247: /* ! 248: * Set up to do reads and writes; call tmscpcmd to issue the cmd. ! 249: */ ! 250: tmscpstrategy(io, func) ! 251: register struct iob *io; ! 252: int func; ! 253: { ! 254: register struct mscp *mp; ! 255: int ubinfo; ! 256: ! 257: ubinfo = ubasetup(io, 1); ! 258: mp = &tmscp.tmscp_cmd; ! 259: mp->mscp_lbn = io->i_bn; ! 260: mp->mscp_unit = io->i_unit&03; ! 261: mp->mscp_bytecnt = io->i_cc; ! 262: mp->mscp_buffer = (ubinfo & 0x3fffff) | (((ubinfo>>28)&0xf)<<24); ! 263: if ((mp = tmscpcmd(func == READ ? M_OP_READ : M_OP_WRITE, 0)) == 0) { ! 264: ubafree(io, ubinfo); ! 265: printf("tms: I/O error\n"); ! 266: return(-1); ! 267: } ! 268: ubafree(io, ubinfo); ! 269: /* ! 270: * Detect hitting tape mark so we do it gracefully and return a ! 271: * character count of 0 to signify end of copy. Rewind the tape ! 272: * before returning. ! 273: */ ! 274: if ((mp->mscp_status & M_ST_MASK) == M_ST_TAPEM) ! 275: return(0); ! 276: return(io->i_cc); ! 277: }
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