1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)ts.c 7.1 (Berkeley) 06/05/86 7 */ 8 9 /* 10 * TS11 tape driver 11 */ 12 #include "../machine/pte.h" 13 14 #include "../h/param.h" 15 #include "../h/inode.h" 16 #include "../h/fs.h" 17 18 #include "../vaxuba/tsreg.h" 19 #include "../vaxuba/ubareg.h" 20 21 #include "saio.h" 22 #include "savax.h" 23 24 25 u_short tsstd[] = { 0772520 }; 26 27 struct iob ctsbuf; 28 29 u_short ts_uba; /* Unibus address of ts structure */ 30 31 struct tsdevice *tsaddr = 0; 32 33 struct ts { 34 struct ts_cmd ts_cmd; 35 struct ts_char ts_char; 36 struct ts_sts ts_sts; 37 } ts; 38 39 tsopen(io) 40 register struct iob *io; 41 { 42 static struct ts *ts_ubaddr; 43 long i = 0; 44 45 if (tsaddr == 0) 46 tsaddr = (struct tsdevice *)ubamem(io->i_unit, tsstd[0]); 47 tsaddr->tssr = 0; 48 while ((tsaddr->tssr & TS_SSR)==0) { 49 DELAY(10); 50 if (++i > 1000000) { 51 printf("ts: not ready\n"); 52 return; 53 } 54 } 55 if (tsaddr->tssr&TS_OFL) { 56 printf("ts: offline\n"); 57 return; 58 } 59 if (tsaddr->tssr&TS_NBA) { 60 int i; 61 62 ctsbuf.i_ma = (caddr_t) &ts; 63 ctsbuf.i_cc = sizeof(ts); 64 if (ts_ubaddr == 0) 65 ts_ubaddr = (struct ts *)ubasetup(&ctsbuf, 2); 66 ts_uba = (u_short)((long)ts_ubaddr + (((long)ts_ubaddr>>16)&03)); 67 ts.ts_char.char_addr = (int)&ts_ubaddr->ts_sts; 68 ts.ts_char.char_size = sizeof(ts.ts_sts); 69 ts.ts_char.char_mode = TS_ESS; 70 ts.ts_cmd.c_cmd = TS_ACK|TS_SETCHR; 71 i = (int)&ts_ubaddr->ts_char; 72 ts.ts_cmd.c_loba = i; 73 ts.ts_cmd.c_hiba = (i>>16)&3; 74 ts.ts_cmd.c_size = sizeof(ts.ts_char); 75 tsaddr->tsdb = ts_uba; 76 } 77 tsstrategy(io, TS_REW); 78 if (io->i_cc = io->i_boff) 79 tsstrategy(io, TS_SFORWF); 80 } 81 82 tsclose(io) 83 register struct iob *io; 84 { 85 86 tsstrategy(io, TS_REW); 87 } 88 89 tsstrategy(io, func) 90 register struct iob *io; 91 { 92 register int errcnt, info = 0; 93 94 errcnt = 0; 95 retry: 96 while ((tsaddr->tssr & TS_SSR) == 0) 97 DELAY(100); 98 if (func == TS_REW || func == TS_SFORWF) 99 ts.ts_cmd.c_repcnt = io->i_cc; 100 else { 101 info = ubasetup(io, 1); 102 ts.ts_cmd.c_size = io->i_cc; 103 ts.ts_cmd.c_loba = info; 104 ts.ts_cmd.c_hiba = (info>>16)&3; 105 } 106 if (func == READ) 107 func = TS_RCOM; 108 else if (func == WRITE) 109 func = TS_WCOM; 110 ts.ts_cmd.c_cmd = TS_ACK|TS_CVC|func; 111 tsaddr->tsdb = ts_uba; 112 do 113 DELAY(100) 114 while ((tsaddr->tssr & TS_SSR) == 0); 115 if (info) 116 ubafree(io, info); 117 if (ts.ts_sts.s_xs0 & TS_TMK) 118 return (0); 119 if (tsaddr->tssr & TS_SC) { 120 printf("ts tape error: er=%b, xs0=%b\n", 121 tsaddr->tssr, TSSR_BITS, 122 ts.ts_sts.s_xs0, TSXS0_BITS); 123 if (errcnt==10) { 124 printf("ts: unrecovered error\n"); 125 return (-1); 126 } 127 errcnt++; 128 if (func == TS_RCOM || func == TS_WCOM) 129 func |= TS_RETRY; 130 goto retry; 131 } 132 if (errcnt) 133 printf("ts: recovered by retry\n"); 134 return (io->i_cc - ts.ts_sts.s_rbpcr); 135 } 136