projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 5567e708 C |
1 | /* ts.c 4.4 81/12/01 */ |
| 2 | ||
| 3 | /* | |
| 4 | * TS11 tape driver | |
| 5 | */ | |
| 6 | ||
| 7 | #include "../h/param.h" | |
| 8 | #include "../h/tsreg.h" | |
| 9 | #include "../h/inode.h" | |
| 10 | #include "../h/pte.h" | |
| 11 | #include "../h/ubareg.h" | |
| 12 | #include "saio.h" | |
| 13 | #include "savax.h" | |
| 14 | ||
| 15 | ||
| 16 | u_short tsstd[] = { 0772520 }; | |
| 17 | ||
| 18 | struct iob ctsbuf; | |
| 19 | ||
| 20 | u_short ts_uba; /* Unibus address of ts structure */ | |
| 21 | ||
| 22 | struct tsdevice *tsaddr = 0; | |
| 23 | ||
| 24 | struct ts { | |
| 25 | struct ts_cmd ts_cmd; | |
| 26 | struct ts_char ts_char; | |
| 27 | struct ts_sts ts_sts; | |
| 28 | } ts; | |
| 29 | ||
| 30 | tsopen(io) | |
| 31 | register struct iob *io; | |
| 32 | { | |
| 33 | static struct ts *ts_ubaddr; | |
| 34 | long i = 0; | |
| 35 | ||
| 36 | if (tsaddr == 0) | |
| 37 | tsaddr = ubamem(io->i_unit, tsstd[0]); | |
| 38 | tsaddr->tssr = 0; | |
| 39 | while ((tsaddr->tssr & TS_SSR)==0) { | |
| 40 | if (++i > 1000000) { | |
| 41 | printf("ts: not ready\n"); | |
| 42 | return; | |
| 43 | } | |
| 44 | } | |
| 45 | if (tsaddr->tssr&TS_OFL) { | |
| 46 | printf("ts: offline\n"); | |
| 47 | return; | |
| 48 | } | |
| 49 | if (tsaddr->tssr&TS_NBA) { | |
| 50 | int i; | |
| 51 | ||
| 52 | ctsbuf.i_ma = (caddr_t) &ts; | |
| 53 | ctsbuf.i_cc = sizeof(ts); | |
| 54 | if (ts_ubaddr == 0) | |
| 55 | ts_ubaddr = (struct ts *)ubasetup(&ctsbuf, 2); | |
| 56 | ts_uba = (u_short)((long)ts_ubaddr + (((long)ts_ubaddr>>16)&03)); | |
| 57 | ts.ts_char.char_addr = (int)&ts_ubaddr->ts_sts; | |
| 58 | ts.ts_char.char_size = sizeof(ts.ts_sts); | |
| 59 | ts.ts_char.char_mode = TS_ESS; | |
| 60 | ts.ts_cmd.c_cmd = TS_ACK|TS_SETCHR; | |
| 61 | i = (int)&ts_ubaddr->ts_char; | |
| 62 | ts.ts_cmd.c_loba = i; | |
| 63 | ts.ts_cmd.c_hiba = (i>>16)&3; | |
| 64 | ts.ts_cmd.c_size = sizeof(ts.ts_char); | |
| 65 | tsaddr->tsdb = ts_uba; | |
| 66 | } | |
| 67 | tsstrategy(io, TS_REW); | |
| 68 | if (io->i_cc = io->i_boff) | |
| 69 | tsstrategy(io, TS_SFORWF); | |
| 70 | } | |
| 71 | ||
| 72 | tsclose(io) | |
| 73 | register struct iob *io; | |
| 74 | { | |
| 75 | ||
| 76 | tsstrategy(io, TS_REW); | |
| 77 | } | |
| 78 | ||
| 79 | tsstrategy(io, func) | |
| 80 | register struct iob *io; | |
| 81 | { | |
| 82 | register int errcnt, info = 0; | |
| 83 | ||
| 84 | errcnt = 0; | |
| 85 | retry: | |
| 86 | while ((tsaddr->tssr & TS_SSR) == 0) | |
| 87 | DELAY(100); | |
| 88 | if (func == TS_REW || func == TS_SFORWF) | |
| 89 | ts.ts_cmd.c_repcnt = io->i_cc; | |
| 90 | else { | |
| 91 | info = ubasetup(io, 1); | |
| 92 | ts.ts_cmd.c_size = io->i_cc; | |
| 93 | ts.ts_cmd.c_loba = info; | |
| 94 | ts.ts_cmd.c_hiba = (info>>16)&3; | |
| 95 | } | |
| 96 | if (func == READ) | |
| 97 | func = TS_RCOM; | |
| 98 | else if (func == WRITE) | |
| 99 | func = TS_WCOM; | |
| 100 | ts.ts_cmd.c_cmd = TS_ACK|TS_CVC|func; | |
| 101 | tsaddr->tsdb = ts_uba; | |
| 102 | do | |
| 103 | DELAY(100) | |
| 104 | while ((tsaddr->tssr & TS_SSR) == 0); | |
| 105 | if (info) | |
| 106 | ubafree(io, info); | |
| 107 | if (ts.ts_sts.s_xs0 & TS_TMK) | |
| 108 | return (0); | |
| 109 | if (tsaddr->tssr & TS_SC) { | |
| 110 | printf("ts tape error: er=%b, xs0=%b", | |
| 111 | tsaddr->tssr, TSSR_BITS, | |
| 112 | ts.ts_sts.s_xs0, TSXS0_BITS); | |
| 113 | if (errcnt==10) { | |
| 114 | printf("ts: unrecovered error\n"); | |
| 115 | return (-1); | |
| 116 | } | |
| 117 | errcnt++; | |
| 118 | if (func == TS_RCOM || func == TS_WCOM) | |
| 119 | func |= TS_RETRY; | |
| 120 | goto retry; | |
| 121 | } | |
| 122 | if (errcnt) | |
| 123 | printf("ts: recovered by retry\n"); | |
| 124 | return (io->i_cc - ts.ts_sts.s_rbpcr); | |
| 125 | } |