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592df170 MT |
1 | #ifndef DEBUG |
2 | #define DEBUG | |
3 | #endif | |
60f56dfc KM |
4 | /* |
5 | * Copyright (c) 1990 The Regents of the University of California. | |
6 | * All rights reserved. | |
7 | * | |
8 | * This code is derived from software contributed to Berkeley by | |
9 | * Van Jacobson of Lawrence Berkeley Laboratory. | |
10 | * | |
11 | * %sccs.include.redist.c% | |
12 | * | |
9acfa6cd | 13 | * @(#)scsi.c 7.7 (Berkeley) %G% |
60f56dfc KM |
14 | */ |
15 | ||
16 | /* | |
17 | * HP9000/3xx 98658 SCSI host adaptor driver. | |
18 | */ | |
19 | #include "scsi.h" | |
20 | #if NSCSI > 0 | |
21 | ||
22 | #ifndef lint | |
9acfa6cd | 23 | static char rcsid[] = "$Header: /usr/src/sys/hp300/dev/RCS/scsi.c,v 1.2 92/04/10 20:48:29 mike Exp $"; |
60f56dfc KM |
24 | #endif |
25 | ||
b28b3a13 KB |
26 | #include "sys/param.h" |
27 | #include "sys/systm.h" | |
28 | #include "sys/buf.h" | |
9acfa6cd | 29 | #include "hp/dev/device.h" |
b28b3a13 | 30 | |
60f56dfc KM |
31 | #include "scsivar.h" |
32 | #include "scsireg.h" | |
33 | #include "dmavar.h" | |
34 | ||
b28b3a13 KB |
35 | #include "../include/cpu.h" |
36 | #include "../hp300/isr.h" | |
60f56dfc | 37 | |
98511a3b KM |
38 | /* |
39 | * SCSI delays | |
40 | * In u-seconds, primarily for state changes on the SPC. | |
41 | */ | |
42 | #define SCSI_CMD_WAIT 1000 /* wait per step of 'immediate' cmds */ | |
43 | #define SCSI_DATA_WAIT 1000 /* wait per data in/out step */ | |
44 | #define SCSI_INIT_WAIT 50000 /* wait per step (both) during init */ | |
45 | ||
60f56dfc | 46 | extern void isrlink(); |
60f56dfc KM |
47 | extern void _insque(); |
48 | extern void _remque(); | |
60f56dfc KM |
49 | |
50 | int scsiinit(), scsigo(), scsiintr(), scsixfer(); | |
51 | void scsistart(), scsidone(), scsifree(), scsireset(); | |
52 | struct driver scsidriver = { | |
53 | scsiinit, "scsi", (int (*)())scsistart, scsigo, scsiintr, | |
54 | (int (*)())scsidone, | |
55 | }; | |
56 | ||
57 | struct scsi_softc scsi_softc[NSCSI]; | |
58 | struct isr scsi_isr[NSCSI]; | |
59 | ||
98511a3b KM |
60 | int scsi_cmd_wait = SCSI_CMD_WAIT; |
61 | int scsi_data_wait = SCSI_DATA_WAIT; | |
62 | int scsi_init_wait = SCSI_INIT_WAIT; | |
63 | ||
60f56dfc | 64 | int scsi_nosync = 1; /* inhibit sync xfers if 1 */ |
d989d7c8 | 65 | int scsi_pridma = 0; /* use "priority" dma */ |
60f56dfc KM |
66 | |
67 | #ifdef DEBUG | |
68 | int scsi_debug = 0; | |
69 | #define WAITHIST | |
70 | #endif | |
71 | ||
72 | #ifdef WAITHIST | |
d989d7c8 | 73 | #define MAXWAIT 1022 |
60f56dfc KM |
74 | u_int ixstart_wait[MAXWAIT+2]; |
75 | u_int ixin_wait[MAXWAIT+2]; | |
76 | u_int ixout_wait[MAXWAIT+2]; | |
77 | u_int mxin_wait[MAXWAIT+2]; | |
98511a3b | 78 | u_int mxin2_wait[MAXWAIT+2]; |
60f56dfc KM |
79 | u_int cxin_wait[MAXWAIT+2]; |
80 | u_int fxfr_wait[MAXWAIT+2]; | |
81 | u_int sgo_wait[MAXWAIT+2]; | |
82 | #define HIST(h,w) (++h[((w)>MAXWAIT? MAXWAIT : ((w) < 0 ? -1 : (w))) + 1]); | |
83 | #else | |
84 | #define HIST(h,w) | |
85 | #endif | |
86 | ||
87 | #define b_cylin b_resid | |
88 | ||
89 | static void | |
90 | scsiabort(hs, hd, where) | |
91 | register struct scsi_softc *hs; | |
92 | volatile register struct scsidevice *hd; | |
93 | char *where; | |
94 | { | |
95 | int len; | |
592df170 MT |
96 | int maxtries; /* XXX - kludge till I understand whats *supposed* to happen */ |
97 | int startlen; /* XXX - kludge till I understand whats *supposed* to happen */ | |
60f56dfc KM |
98 | u_char junk; |
99 | ||
100 | printf("scsi%d: abort from %s: phase=0x%x, ssts=0x%x, ints=0x%x\n", | |
101 | hs->sc_hc->hp_unit, where, hd->scsi_psns, hd->scsi_ssts, | |
102 | hd->scsi_ints); | |
103 | ||
104 | hd->scsi_ints = hd->scsi_ints; | |
105 | hd->scsi_csr = 0; | |
106 | if (hd->scsi_psns == 0 || (hd->scsi_ssts & SSTS_INITIATOR) == 0) | |
107 | /* no longer connected to scsi target */ | |
108 | return; | |
109 | ||
110 | /* get the number of bytes remaining in current xfer + fudge */ | |
111 | len = (hd->scsi_tch << 16) | (hd->scsi_tcm << 8) | hd->scsi_tcl; | |
112 | ||
113 | /* for that many bus cycles, try to send an abort msg */ | |
592df170 | 114 | for (startlen = (len += 1024); (hd->scsi_ssts & SSTS_INITIATOR) && --len >= 0; ) { |
60f56dfc | 115 | hd->scsi_scmd = SCMD_SET_ATN; |
592df170 | 116 | maxtries = 1000; |
60f56dfc KM |
117 | while ((hd->scsi_psns & PSNS_REQ) == 0) { |
118 | if (! (hd->scsi_ssts & SSTS_INITIATOR)) | |
119 | goto out; | |
120 | DELAY(1); | |
592df170 MT |
121 | if (--maxtries == 0) { |
122 | printf("-- scsiabort gave up after 1000 tries (startlen = %d len = %d)\n", | |
123 | startlen, len); | |
124 | goto out2; | |
125 | } | |
126 | ||
60f56dfc | 127 | } |
592df170 | 128 | out2: |
60f56dfc KM |
129 | if ((hd->scsi_psns & PHASE) == MESG_OUT_PHASE) |
130 | hd->scsi_scmd = SCMD_RST_ATN; | |
131 | hd->scsi_pctl = hd->scsi_psns & PHASE; | |
132 | if (hd->scsi_psns & PHASE_IO) { | |
133 | /* one of the input phases - read & discard a byte */ | |
134 | hd->scsi_scmd = SCMD_SET_ACK; | |
135 | if (hd->scsi_tmod == 0) | |
136 | while (hd->scsi_psns & PSNS_REQ) | |
137 | DELAY(1); | |
138 | junk = hd->scsi_temp; | |
139 | } else { | |
140 | /* one of the output phases - send an abort msg */ | |
141 | hd->scsi_temp = MSG_ABORT; | |
142 | hd->scsi_scmd = SCMD_SET_ACK; | |
143 | if (hd->scsi_tmod == 0) | |
144 | while (hd->scsi_psns & PSNS_REQ) | |
145 | DELAY(1); | |
146 | } | |
147 | hd->scsi_scmd = SCMD_RST_ACK; | |
148 | } | |
149 | out: | |
150 | /* | |
151 | * Either the abort was successful & the bus is disconnected or | |
152 | * the device didn't listen. If the latter, announce the problem. | |
153 | * Either way, reset the card & the SPC. | |
154 | */ | |
155 | if (len < 0 && hs) | |
156 | printf("scsi%d: abort failed. phase=0x%x, ssts=0x%x\n", | |
157 | hs->sc_hc->hp_unit, hd->scsi_psns, hd->scsi_ssts); | |
158 | ||
159 | if (! ((junk = hd->scsi_ints) & INTS_RESEL)) { | |
160 | hd->scsi_sctl |= SCTL_CTRLRST; | |
161 | DELAY(1); | |
162 | hd->scsi_sctl &=~ SCTL_CTRLRST; | |
163 | hd->scsi_hconf = 0; | |
164 | hd->scsi_ints = hd->scsi_ints; | |
165 | } | |
166 | } | |
167 | ||
98511a3b KM |
168 | /* |
169 | * XXX Set/reset long delays. | |
170 | * | |
171 | * if delay == 0, reset default delays | |
172 | * if delay < 0, set both delays to default long initialization values | |
173 | * if delay > 0, set both delays to this value | |
174 | * | |
175 | * Used when a devices is expected to respond slowly (e.g. during | |
176 | * initialization). | |
177 | */ | |
178 | void | |
179 | scsi_delay(delay) | |
180 | int delay; | |
181 | { | |
182 | static int saved_cmd_wait, saved_data_wait; | |
183 | ||
184 | if (delay) { | |
185 | saved_cmd_wait = scsi_cmd_wait; | |
186 | saved_data_wait = scsi_data_wait; | |
187 | if (delay > 0) | |
188 | scsi_cmd_wait = scsi_data_wait = delay; | |
189 | else | |
190 | scsi_cmd_wait = scsi_data_wait = scsi_init_wait; | |
191 | } else { | |
192 | scsi_cmd_wait = saved_cmd_wait; | |
193 | scsi_data_wait = saved_data_wait; | |
194 | } | |
195 | } | |
196 | ||
60f56dfc KM |
197 | int |
198 | scsiinit(hc) | |
199 | register struct hp_ctlr *hc; | |
200 | { | |
201 | register struct scsi_softc *hs = &scsi_softc[hc->hp_unit]; | |
202 | register struct scsidevice *hd = (struct scsidevice *)hc->hp_addr; | |
203 | ||
204 | if ((hd->scsi_id & ID_MASK) != SCSI_ID) | |
205 | return(0); | |
206 | hc->hp_ipl = SCSI_IPL(hd->scsi_csr); | |
207 | hs->sc_hc = hc; | |
208 | hs->sc_dq.dq_unit = hc->hp_unit; | |
209 | hs->sc_dq.dq_driver = &scsidriver; | |
210 | hs->sc_sq.dq_forw = hs->sc_sq.dq_back = &hs->sc_sq; | |
211 | scsi_isr[hc->hp_unit].isr_intr = scsiintr; | |
212 | scsi_isr[hc->hp_unit].isr_ipl = hc->hp_ipl; | |
213 | scsi_isr[hc->hp_unit].isr_arg = hc->hp_unit; | |
214 | isrlink(&scsi_isr[hc->hp_unit]); | |
215 | scsireset(hc->hp_unit); | |
9acfa6cd MH |
216 | /* |
217 | * XXX scale initialization wait according to CPU speed. | |
218 | * Should we do this for all wait? Should we do this at all? | |
219 | */ | |
220 | scsi_init_wait *= cpuspeed; | |
60f56dfc KM |
221 | return(1); |
222 | } | |
223 | ||
224 | void | |
225 | scsireset(unit) | |
226 | register int unit; | |
227 | { | |
228 | register struct scsi_softc *hs = &scsi_softc[unit]; | |
229 | volatile register struct scsidevice *hd = | |
230 | (struct scsidevice *)hs->sc_hc->hp_addr; | |
231 | u_int i; | |
232 | ||
233 | if (hs->sc_flags & SCSI_ALIVE) | |
234 | scsiabort(hs, hd, "reset"); | |
235 | ||
236 | printf("scsi%d: ", unit); | |
237 | ||
238 | hd->scsi_id = 0xFF; | |
239 | DELAY(100); | |
240 | /* | |
241 | * Disable interrupts then reset the FUJI chip. | |
242 | */ | |
243 | hd->scsi_csr = 0; | |
244 | hd->scsi_sctl = SCTL_DISABLE | SCTL_CTRLRST; | |
245 | hd->scsi_scmd = 0; | |
246 | hd->scsi_tmod = 0; | |
247 | hd->scsi_pctl = 0; | |
248 | hd->scsi_temp = 0; | |
249 | hd->scsi_tch = 0; | |
250 | hd->scsi_tcm = 0; | |
251 | hd->scsi_tcl = 0; | |
252 | hd->scsi_ints = 0; | |
253 | ||
254 | if ((hd->scsi_id & ID_WORD_DMA) == 0) { | |
255 | hs->sc_flags |= SCSI_DMA32; | |
256 | printf("32 bit dma, "); | |
257 | } | |
258 | ||
259 | /* Determine Max Synchronous Transfer Rate */ | |
260 | if (scsi_nosync) | |
261 | i = 3; | |
262 | else | |
263 | i = SCSI_SYNC_XFER(hd->scsi_hconf); | |
264 | switch (i) { | |
265 | case 0: | |
266 | hs->sc_sync = TMOD_SYNC | 0x3e; /* 250 nsecs */ | |
267 | printf("250ns sync"); | |
268 | break; | |
269 | case 1: | |
270 | hs->sc_sync = TMOD_SYNC | 0x5e; /* 375 nsecs */ | |
271 | printf("375ns sync"); | |
272 | break; | |
273 | case 2: | |
274 | hs->sc_sync = TMOD_SYNC | 0x7d; /* 500 nsecs */ | |
275 | printf("500ns sync"); | |
276 | break; | |
277 | case 3: | |
278 | hs->sc_sync = 0; | |
279 | printf("async"); | |
280 | break; | |
281 | } | |
282 | ||
283 | /* | |
284 | * Configure the FUJI chip with its SCSI address, all | |
285 | * interrupts enabled & appropriate parity. | |
286 | */ | |
287 | i = (~hd->scsi_hconf) & 0x7; | |
288 | hs->sc_scsi_addr = 1 << i; | |
289 | hd->scsi_bdid = i; | |
290 | if (hd->scsi_hconf & HCONF_PARITY) | |
291 | hd->scsi_sctl = SCTL_DISABLE | SCTL_ABRT_ENAB | | |
292 | SCTL_SEL_ENAB | SCTL_RESEL_ENAB | | |
293 | SCTL_INTR_ENAB | SCTL_PARITY_ENAB; | |
294 | else { | |
295 | hd->scsi_sctl = SCTL_DISABLE | SCTL_ABRT_ENAB | | |
296 | SCTL_SEL_ENAB | SCTL_RESEL_ENAB | | |
297 | SCTL_INTR_ENAB; | |
298 | printf(", no parity"); | |
299 | } | |
300 | hd->scsi_sctl &=~ SCTL_DISABLE; | |
301 | ||
302 | printf(", scsi id %d\n", i); | |
303 | hs->sc_flags |= SCSI_ALIVE; | |
304 | } | |
305 | ||
306 | static void | |
307 | scsierror(hs, hd, ints) | |
308 | register struct scsi_softc *hs; | |
309 | volatile register struct scsidevice *hd; | |
310 | u_char ints; | |
311 | { | |
312 | int unit = hs->sc_hc->hp_unit; | |
313 | char *sep = ""; | |
314 | ||
315 | printf("scsi%d: ", unit); | |
316 | if (ints & INTS_RST) { | |
317 | DELAY(100); | |
318 | if (hd->scsi_hconf & HCONF_SD) | |
319 | printf("spurious RST interrupt"); | |
320 | else | |
321 | printf("hardware error - check fuse"); | |
322 | sep = ", "; | |
323 | } | |
324 | if ((ints & INTS_HARD_ERR) || hd->scsi_serr) { | |
325 | if (hd->scsi_serr & SERR_SCSI_PAR) { | |
326 | printf("%sparity err", sep); | |
327 | sep = ", "; | |
328 | } | |
329 | if (hd->scsi_serr & SERR_SPC_PAR) { | |
330 | printf("%sSPC parity err", sep); | |
331 | sep = ", "; | |
332 | } | |
333 | if (hd->scsi_serr & SERR_TC_PAR) { | |
334 | printf("%sTC parity err", sep); | |
335 | sep = ", "; | |
336 | } | |
337 | if (hd->scsi_serr & SERR_PHASE_ERR) { | |
338 | printf("%sphase err", sep); | |
339 | sep = ", "; | |
340 | } | |
341 | if (hd->scsi_serr & SERR_SHORT_XFR) { | |
342 | printf("%ssync short transfer err", sep); | |
343 | sep = ", "; | |
344 | } | |
345 | if (hd->scsi_serr & SERR_OFFSET) { | |
346 | printf("%ssync offset error", sep); | |
347 | sep = ", "; | |
348 | } | |
349 | } | |
350 | if (ints & INTS_TIMEOUT) | |
351 | printf("%sSPC select timeout error", sep); | |
352 | if (ints & INTS_SRV_REQ) | |
353 | printf("%sspurious SRV_REQ interrupt", sep); | |
354 | if (ints & INTS_CMD_DONE) | |
355 | printf("%sspurious CMD_DONE interrupt", sep); | |
356 | if (ints & INTS_DISCON) | |
357 | printf("%sspurious disconnect interrupt", sep); | |
358 | if (ints & INTS_RESEL) | |
359 | printf("%sspurious reselect interrupt", sep); | |
360 | if (ints & INTS_SEL) | |
361 | printf("%sspurious select interrupt", sep); | |
362 | printf("\n"); | |
363 | } | |
364 | ||
365 | static int | |
366 | issue_select(hd, target, our_addr) | |
367 | volatile register struct scsidevice *hd; | |
368 | u_char target, our_addr; | |
369 | { | |
370 | if (hd->scsi_ssts & (SSTS_INITIATOR|SSTS_TARGET|SSTS_BUSY)) | |
371 | return (1); | |
372 | ||
373 | if (hd->scsi_ints & INTS_DISCON) | |
374 | hd->scsi_ints = INTS_DISCON; | |
375 | ||
376 | hd->scsi_pctl = 0; | |
377 | hd->scsi_temp = (1 << target) | our_addr; | |
378 | /* select timeout is hardcoded to 2ms */ | |
379 | hd->scsi_tch = 0; | |
380 | hd->scsi_tcm = 32; | |
381 | hd->scsi_tcl = 4; | |
382 | ||
383 | hd->scsi_scmd = SCMD_SELECT; | |
384 | return (0); | |
385 | } | |
386 | ||
387 | static int | |
388 | wait_for_select(hd) | |
389 | volatile register struct scsidevice *hd; | |
390 | { | |
391 | u_char ints; | |
392 | ||
393 | while ((ints = hd->scsi_ints) == 0) | |
394 | DELAY(1); | |
395 | hd->scsi_ints = ints; | |
396 | return (!(hd->scsi_ssts & SSTS_INITIATOR)); | |
397 | } | |
398 | ||
399 | static int | |
400 | ixfer_start(hd, len, phase, wait) | |
401 | volatile register struct scsidevice *hd; | |
402 | int len; | |
403 | u_char phase; | |
404 | register int wait; | |
405 | { | |
406 | ||
407 | hd->scsi_tch = len >> 16; | |
408 | hd->scsi_tcm = len >> 8; | |
409 | hd->scsi_tcl = len; | |
410 | hd->scsi_pctl = phase; | |
411 | hd->scsi_tmod = 0; /*XXX*/ | |
412 | hd->scsi_scmd = SCMD_XFR | SCMD_PROG_XFR; | |
413 | ||
414 | /* wait for xfer to start or svc_req interrupt */ | |
415 | while ((hd->scsi_ssts & SSTS_BUSY) == 0) { | |
416 | if (hd->scsi_ints || --wait < 0) { | |
417 | #ifdef DEBUG | |
418 | if (scsi_debug) | |
419 | printf("ixfer_start fail: i%x, w%d\n", | |
420 | hd->scsi_ints, wait); | |
421 | #endif | |
422 | HIST(ixstart_wait, wait) | |
423 | return (0); | |
424 | } | |
425 | DELAY(1); | |
426 | } | |
427 | HIST(ixstart_wait, wait) | |
428 | return (1); | |
429 | } | |
430 | ||
431 | static int | |
432 | ixfer_out(hd, len, buf) | |
433 | volatile register struct scsidevice *hd; | |
434 | int len; | |
435 | register u_char *buf; | |
436 | { | |
437 | register int wait = scsi_data_wait; | |
438 | ||
439 | for (; len > 0; --len) { | |
440 | while (hd->scsi_ssts & SSTS_DREG_FULL) { | |
441 | if (hd->scsi_ints || --wait < 0) { | |
442 | #ifdef DEBUG | |
443 | if (scsi_debug) | |
444 | printf("ixfer_out fail: l%d i%x w%d\n", | |
445 | len, hd->scsi_ints, wait); | |
446 | #endif | |
447 | HIST(ixout_wait, wait) | |
448 | return (len); | |
449 | } | |
450 | DELAY(1); | |
451 | } | |
452 | hd->scsi_dreg = *buf++; | |
453 | } | |
454 | HIST(ixout_wait, wait) | |
455 | return (0); | |
456 | } | |
457 | ||
458 | static void | |
459 | ixfer_in(hd, len, buf) | |
460 | volatile register struct scsidevice *hd; | |
461 | int len; | |
462 | register u_char *buf; | |
463 | { | |
464 | register int wait = scsi_data_wait; | |
465 | ||
466 | for (; len > 0; --len) { | |
467 | while (hd->scsi_ssts & SSTS_DREG_EMPTY) { | |
468 | if (hd->scsi_ints || --wait < 0) { | |
469 | while (! (hd->scsi_ssts & SSTS_DREG_EMPTY)) { | |
470 | *buf++ = hd->scsi_dreg; | |
471 | --len; | |
472 | } | |
473 | #ifdef DEBUG | |
474 | if (scsi_debug) | |
475 | printf("ixfer_in fail: l%d i%x w%d\n", | |
476 | len, hd->scsi_ints, wait); | |
477 | #endif | |
478 | HIST(ixin_wait, wait) | |
479 | return; | |
480 | } | |
481 | DELAY(1); | |
482 | } | |
483 | *buf++ = hd->scsi_dreg; | |
484 | } | |
485 | HIST(ixin_wait, wait) | |
486 | } | |
487 | ||
488 | static int | |
489 | mxfer_in(hd, len, buf, phase) | |
490 | volatile register struct scsidevice *hd; | |
491 | register int len; | |
492 | register u_char *buf; | |
493 | register u_char phase; | |
494 | { | |
495 | register int wait = scsi_cmd_wait; | |
496 | register int i; | |
497 | ||
498 | hd->scsi_tmod = 0; | |
499 | for (i = 0; i < len; ++i) { | |
98511a3b KM |
500 | /* |
501 | * manual sez: reset ATN before ACK is sent. | |
502 | */ | |
503 | if (hd->scsi_psns & PSNS_ATN) | |
504 | hd->scsi_scmd = SCMD_RST_ATN; | |
60f56dfc KM |
505 | /* |
506 | * wait for the request line (which says the target | |
507 | * wants to give us data). If the phase changes while | |
508 | * we're waiting, we're done. | |
509 | */ | |
510 | while ((hd->scsi_psns & PSNS_REQ) == 0) { | |
511 | if (--wait < 0) { | |
512 | HIST(mxin_wait, wait) | |
513 | return (-1); | |
514 | } | |
515 | if ((hd->scsi_psns & PHASE) != phase || | |
516 | (hd->scsi_ssts & SSTS_INITIATOR) == 0) | |
517 | goto out; | |
518 | ||
519 | DELAY(1); | |
520 | } | |
521 | /* | |
522 | * set ack (which says we're ready for the data, wait for | |
523 | * req to go away (target says data is available), grab the | |
524 | * data, then reset ack (say we've got the data). | |
525 | */ | |
526 | hd->scsi_pctl = phase; | |
527 | hd->scsi_scmd = SCMD_SET_ACK; | |
528 | while (hd->scsi_psns & PSNS_REQ) { | |
529 | if (--wait < 0) { | |
530 | HIST(mxin_wait, wait) | |
531 | return (-2); | |
532 | } | |
533 | DELAY(1); | |
534 | } | |
535 | *buf++ = hd->scsi_temp; | |
536 | hd->scsi_scmd = SCMD_RST_ACK; | |
60f56dfc KM |
537 | } |
538 | out: | |
539 | HIST(mxin_wait, wait) | |
98511a3b KM |
540 | /* |
541 | * Wait for manual transfer to finish. | |
542 | * Avoids occasional "unexpected phase" errors in finishxfer | |
543 | * formerly addressed by per-slave delays. | |
544 | */ | |
545 | wait = scsi_cmd_wait; | |
546 | while ((hd->scsi_ssts & SSTS_ACTIVE) == SSTS_INITIATOR) { | |
547 | if (--wait < 0) | |
548 | break; | |
549 | DELAY(1); | |
550 | } | |
551 | HIST(mxin2_wait, wait) | |
60f56dfc KM |
552 | return (i); |
553 | } | |
554 | ||
555 | /* | |
556 | * SCSI 'immediate' command: issue a command to some SCSI device | |
557 | * and get back an 'immediate' response (i.e., do programmed xfer | |
558 | * to get the response data). 'cbuf' is a buffer containing a scsi | |
559 | * command of length clen bytes. 'buf' is a buffer of length 'len' | |
560 | * bytes for data. The transfer direction is determined by the device | |
561 | * (i.e., by the scsi bus data xfer phase). If 'len' is zero, the | |
562 | * command must supply no data. 'xferphase' is the bus phase the | |
563 | * caller expects to happen after the command is issued. It should | |
564 | * be one of DATA_IN_PHASE, DATA_OUT_PHASE or STATUS_PHASE. | |
565 | */ | |
566 | static int | |
567 | scsiicmd(hs, target, cbuf, clen, buf, len, xferphase) | |
568 | struct scsi_softc *hs; | |
569 | int target; | |
570 | u_char *cbuf; | |
571 | int clen; | |
572 | u_char *buf; | |
573 | int len; | |
574 | u_char xferphase; | |
575 | { | |
576 | volatile register struct scsidevice *hd = | |
577 | (struct scsidevice *)hs->sc_hc->hp_addr; | |
578 | u_char phase, ints; | |
579 | register int wait; | |
580 | ||
581 | /* select the SCSI bus (it's an error if bus isn't free) */ | |
582 | if (issue_select(hd, target, hs->sc_scsi_addr)) | |
583 | return (-1); | |
584 | if (wait_for_select(hd)) | |
585 | return (-1); | |
586 | /* | |
587 | * Wait for a phase change (or error) then let the device | |
588 | * sequence us through the various SCSI phases. | |
589 | */ | |
590 | hs->sc_stat[0] = 0xff; | |
591 | hs->sc_msg[0] = 0xff; | |
592 | phase = CMD_PHASE; | |
593 | while (1) { | |
594 | wait = scsi_cmd_wait; | |
595 | switch (phase) { | |
596 | ||
597 | case CMD_PHASE: | |
598 | if (ixfer_start(hd, clen, phase, wait)) | |
599 | if (ixfer_out(hd, clen, cbuf)) | |
600 | goto abort; | |
601 | phase = xferphase; | |
602 | break; | |
603 | ||
604 | case DATA_IN_PHASE: | |
605 | if (len <= 0) | |
606 | goto abort; | |
607 | wait = scsi_data_wait; | |
608 | if (ixfer_start(hd, len, phase, wait) || | |
609 | !(hd->scsi_ssts & SSTS_DREG_EMPTY)) | |
610 | ixfer_in(hd, len, buf); | |
611 | phase = STATUS_PHASE; | |
612 | break; | |
613 | ||
614 | case DATA_OUT_PHASE: | |
615 | if (len <= 0) | |
616 | goto abort; | |
617 | wait = scsi_data_wait; | |
618 | if (ixfer_start(hd, len, phase, wait)) { | |
619 | if (ixfer_out(hd, len, buf)) | |
620 | goto abort; | |
621 | } | |
622 | phase = STATUS_PHASE; | |
623 | break; | |
624 | ||
625 | case STATUS_PHASE: | |
626 | wait = scsi_data_wait; | |
627 | if (ixfer_start(hd, sizeof(hs->sc_stat), phase, wait) || | |
628 | !(hd->scsi_ssts & SSTS_DREG_EMPTY)) | |
629 | ixfer_in(hd, sizeof(hs->sc_stat), hs->sc_stat); | |
630 | phase = MESG_IN_PHASE; | |
631 | break; | |
632 | ||
633 | case MESG_IN_PHASE: | |
634 | if (ixfer_start(hd, sizeof(hs->sc_msg), phase, wait) || | |
635 | !(hd->scsi_ssts & SSTS_DREG_EMPTY)) { | |
636 | ixfer_in(hd, sizeof(hs->sc_msg), hs->sc_msg); | |
637 | hd->scsi_scmd = SCMD_RST_ACK; | |
638 | } | |
639 | phase = BUS_FREE_PHASE; | |
640 | break; | |
641 | ||
642 | case BUS_FREE_PHASE: | |
643 | goto out; | |
644 | ||
645 | default: | |
646 | printf("scsi%d: unexpected phase %d in icmd from %d\n", | |
647 | hs->sc_hc->hp_unit, phase, target); | |
648 | goto abort; | |
649 | } | |
650 | /* wait for last command to complete */ | |
651 | while ((ints = hd->scsi_ints) == 0) { | |
652 | if (--wait < 0) { | |
653 | HIST(cxin_wait, wait) | |
654 | goto abort; | |
655 | } | |
656 | DELAY(1); | |
657 | } | |
658 | HIST(cxin_wait, wait) | |
659 | hd->scsi_ints = ints; | |
660 | if (ints & INTS_SRV_REQ) | |
661 | phase = hd->scsi_psns & PHASE; | |
662 | else if (ints & INTS_DISCON) | |
663 | goto out; | |
664 | else if ((ints & INTS_CMD_DONE) == 0) { | |
665 | scsierror(hs, hd, ints); | |
666 | goto abort; | |
667 | } | |
668 | } | |
669 | abort: | |
670 | scsiabort(hs, hd, "icmd"); | |
671 | out: | |
672 | return (hs->sc_stat[0]); | |
673 | } | |
674 | ||
675 | /* | |
676 | * Finish SCSI xfer command: After the completion interrupt from | |
677 | * a read/write operation, sequence through the final phases in | |
678 | * programmed i/o. This routine is a lot like scsiicmd except we | |
679 | * skip (and don't allow) the select, cmd out and data in/out phases. | |
680 | */ | |
681 | static void | |
682 | finishxfer(hs, hd, target) | |
683 | struct scsi_softc *hs; | |
684 | volatile register struct scsidevice *hd; | |
685 | int target; | |
686 | { | |
687 | u_char phase, ints; | |
688 | ||
689 | /* | |
690 | * We specified padding xfer so we ended with either a phase | |
691 | * change interrupt (normal case) or an error interrupt (handled | |
692 | * elsewhere). Reset the board dma logic then try to get the | |
693 | * completion status & command done msg. The reset confuses | |
694 | * the SPC REQ/ACK logic so we have to do any status/msg input | |
695 | * operations via 'manual xfer'. | |
696 | */ | |
697 | if (hd->scsi_ssts & SSTS_BUSY) { | |
698 | int wait = scsi_cmd_wait; | |
699 | ||
700 | /* wait for dma operation to finish */ | |
701 | while (hd->scsi_ssts & SSTS_BUSY) { | |
702 | if (--wait < 0) { | |
703 | #ifdef DEBUG | |
704 | if (scsi_debug) | |
705 | printf("finishxfer fail: ssts %x\n", | |
706 | hd->scsi_ssts); | |
707 | #endif | |
708 | HIST(fxfr_wait, wait) | |
709 | goto abort; | |
710 | } | |
711 | } | |
712 | HIST(fxfr_wait, wait) | |
713 | } | |
714 | hd->scsi_scmd |= SCMD_PROG_XFR; | |
715 | hd->scsi_sctl |= SCTL_CTRLRST; | |
716 | DELAY(1); | |
717 | hd->scsi_sctl &=~ SCTL_CTRLRST; | |
718 | hd->scsi_hconf = 0; | |
592df170 MT |
719 | /* |
720 | * The following delay is definitely needed when trying to | |
721 | * write on a write protected disk (in the optical jukebox anyways), | |
722 | * but we shall see if other unexplained machine freezeups | |
723 | * also stop occuring... A value of 5 seems to work but | |
724 | * 10 seems safer considering the potential consequences. | |
725 | */ | |
726 | DELAY(10); | |
60f56dfc KM |
727 | hs->sc_stat[0] = 0xff; |
728 | hs->sc_msg[0] = 0xff; | |
729 | hd->scsi_csr = 0; | |
730 | hd->scsi_ints = ints = hd->scsi_ints; | |
731 | while (1) { | |
732 | phase = hd->scsi_psns & PHASE; | |
733 | switch (phase) { | |
734 | ||
735 | case STATUS_PHASE: | |
736 | if (mxfer_in(hd, sizeof(hs->sc_stat), hs->sc_stat, | |
737 | phase) <= 0) | |
738 | goto abort; | |
739 | break; | |
740 | ||
741 | case MESG_IN_PHASE: | |
742 | if (mxfer_in(hd, sizeof(hs->sc_msg), hs->sc_msg, | |
743 | phase) < 0) | |
744 | goto abort; | |
745 | break; | |
746 | ||
747 | case BUS_FREE_PHASE: | |
748 | return; | |
749 | ||
750 | default: | |
751 | printf("scsi%d: unexpected phase %d in finishxfer from %d\n", | |
752 | hs->sc_hc->hp_unit, phase, target); | |
753 | goto abort; | |
754 | } | |
755 | if (ints = hd->scsi_ints) { | |
756 | hd->scsi_ints = ints; | |
757 | if (ints & INTS_DISCON) | |
758 | return; | |
759 | else if (ints & ~(INTS_SRV_REQ|INTS_CMD_DONE)) { | |
760 | scsierror(hs, hd, ints); | |
761 | break; | |
762 | } | |
763 | } | |
764 | if ((hd->scsi_ssts & SSTS_INITIATOR) == 0) | |
765 | return; | |
766 | } | |
767 | abort: | |
768 | scsiabort(hs, hd, "finishxfer"); | |
769 | hs->sc_stat[0] = 0xfe; | |
770 | } | |
771 | ||
772 | int | |
773 | scsi_test_unit_rdy(ctlr, slave, unit) | |
774 | int ctlr, slave, unit; | |
775 | { | |
776 | register struct scsi_softc *hs = &scsi_softc[ctlr]; | |
777 | static struct scsi_cdb6 cdb = { CMD_TEST_UNIT_READY }; | |
778 | ||
779 | cdb.lun = unit; | |
780 | return (scsiicmd(hs, slave, &cdb, sizeof(cdb), (u_char *)0, 0, | |
781 | STATUS_PHASE)); | |
782 | } | |
783 | ||
784 | int | |
785 | scsi_request_sense(ctlr, slave, unit, buf, len) | |
786 | int ctlr, slave, unit; | |
787 | u_char *buf; | |
788 | unsigned len; | |
789 | { | |
790 | register struct scsi_softc *hs = &scsi_softc[ctlr]; | |
791 | static struct scsi_cdb6 cdb = { CMD_REQUEST_SENSE }; | |
792 | ||
793 | cdb.lun = unit; | |
794 | cdb.len = len; | |
795 | return (scsiicmd(hs, slave, &cdb, sizeof(cdb), buf, len, DATA_IN_PHASE)); | |
796 | } | |
797 | ||
798 | int | |
799 | scsi_immed_command(ctlr, slave, unit, cdb, buf, len, rd) | |
800 | int ctlr, slave, unit; | |
801 | struct scsi_fmt_cdb *cdb; | |
802 | u_char *buf; | |
803 | unsigned len; | |
804 | { | |
805 | register struct scsi_softc *hs = &scsi_softc[ctlr]; | |
806 | ||
807 | cdb->cdb[1] |= unit << 5; | |
808 | return (scsiicmd(hs, slave, cdb->cdb, cdb->len, buf, len, | |
809 | rd != 0? DATA_IN_PHASE : DATA_OUT_PHASE)); | |
810 | } | |
811 | ||
812 | /* | |
813 | * The following routines are test-and-transfer i/o versions of read/write | |
814 | * for things like reading disk labels and writing core dumps. The | |
815 | * routine scsigo should be used for normal data transfers, NOT these | |
816 | * routines. | |
817 | */ | |
818 | int | |
819 | scsi_tt_read(ctlr, slave, unit, buf, len, blk, bshift) | |
820 | int ctlr, slave, unit; | |
821 | u_char *buf; | |
822 | u_int len; | |
823 | daddr_t blk; | |
824 | int bshift; | |
825 | { | |
826 | register struct scsi_softc *hs = &scsi_softc[ctlr]; | |
827 | struct scsi_cdb10 cdb; | |
828 | int stat; | |
829 | int old_wait = scsi_data_wait; | |
830 | ||
831 | scsi_data_wait = 300000; | |
832 | bzero(&cdb, sizeof(cdb)); | |
833 | cdb.cmd = CMD_READ_EXT; | |
834 | cdb.lun = unit; | |
835 | blk >>= bshift; | |
836 | cdb.lbah = blk >> 24; | |
837 | cdb.lbahm = blk >> 16; | |
838 | cdb.lbalm = blk >> 8; | |
839 | cdb.lbal = blk; | |
840 | cdb.lenh = len >> (8 + DEV_BSHIFT + bshift); | |
841 | cdb.lenl = len >> (DEV_BSHIFT + bshift); | |
842 | stat = scsiicmd(hs, slave, &cdb, sizeof(cdb), buf, len, DATA_IN_PHASE); | |
843 | scsi_data_wait = old_wait; | |
844 | return (stat); | |
845 | } | |
846 | ||
847 | int | |
848 | scsi_tt_write(ctlr, slave, unit, buf, len, blk, bshift) | |
849 | int ctlr, slave, unit; | |
850 | u_char *buf; | |
851 | u_int len; | |
852 | daddr_t blk; | |
853 | int bshift; | |
854 | { | |
855 | register struct scsi_softc *hs = &scsi_softc[ctlr]; | |
856 | struct scsi_cdb10 cdb; | |
857 | int stat; | |
858 | int old_wait = scsi_data_wait; | |
859 | ||
860 | scsi_data_wait = 300000; | |
861 | ||
862 | bzero(&cdb, sizeof(cdb)); | |
863 | cdb.cmd = CMD_WRITE_EXT; | |
864 | cdb.lun = unit; | |
865 | blk >>= bshift; | |
866 | cdb.lbah = blk >> 24; | |
867 | cdb.lbahm = blk >> 16; | |
868 | cdb.lbalm = blk >> 8; | |
869 | cdb.lbal = blk; | |
870 | cdb.lenh = len >> (8 + DEV_BSHIFT + bshift); | |
871 | cdb.lenl = len >> (DEV_BSHIFT + bshift); | |
872 | stat = scsiicmd(hs, slave, &cdb, sizeof(cdb), buf, len, DATA_OUT_PHASE); | |
873 | scsi_data_wait = old_wait; | |
874 | return (stat); | |
875 | } | |
876 | ||
60f56dfc KM |
877 | int |
878 | scsireq(dq) | |
879 | register struct devqueue *dq; | |
880 | { | |
881 | register struct devqueue *hq; | |
882 | ||
883 | hq = &scsi_softc[dq->dq_ctlr].sc_sq; | |
884 | insque(dq, hq->dq_back); | |
885 | if (dq->dq_back == hq) | |
886 | return(1); | |
887 | return(0); | |
888 | } | |
889 | ||
890 | int | |
891 | scsiustart(unit) | |
892 | int unit; | |
893 | { | |
894 | register struct scsi_softc *hs = &scsi_softc[unit]; | |
895 | ||
896 | hs->sc_dq.dq_ctlr = DMA0 | DMA1; | |
9acfa6cd | 897 | hs->sc_flags |= SCSI_HAVEDMA; |
60f56dfc KM |
898 | if (dmareq(&hs->sc_dq)) |
899 | return(1); | |
900 | return(0); | |
901 | } | |
902 | ||
903 | void | |
904 | scsistart(unit) | |
905 | int unit; | |
906 | { | |
907 | register struct devqueue *dq; | |
908 | ||
909 | dq = scsi_softc[unit].sc_sq.dq_forw; | |
910 | (dq->dq_driver->d_go)(dq->dq_unit); | |
911 | } | |
912 | ||
913 | int | |
914 | scsigo(ctlr, slave, unit, bp, cdb, pad) | |
915 | int ctlr, slave, unit; | |
916 | struct buf *bp; | |
917 | struct scsi_fmt_cdb *cdb; | |
918 | int pad; | |
919 | { | |
920 | register struct scsi_softc *hs = &scsi_softc[ctlr]; | |
921 | volatile register struct scsidevice *hd = | |
922 | (struct scsidevice *)hs->sc_hc->hp_addr; | |
923 | int i, dmaflags; | |
924 | u_char phase, ints, cmd; | |
925 | ||
926 | cdb->cdb[1] |= unit << 5; | |
927 | ||
928 | /* select the SCSI bus (it's an error if bus isn't free) */ | |
929 | if (issue_select(hd, slave, hs->sc_scsi_addr) || wait_for_select(hd)) { | |
9acfa6cd MH |
930 | if (hs->sc_flags & SCSI_HAVEDMA) { |
931 | hs->sc_flags &=~ SCSI_HAVEDMA; | |
932 | dmafree(&hs->sc_dq); | |
933 | } | |
60f56dfc KM |
934 | return (1); |
935 | } | |
936 | /* | |
937 | * Wait for a phase change (or error) then let the device | |
938 | * sequence us through command phase (we may have to take | |
939 | * a msg in/out before doing the command). If the disk has | |
940 | * to do a seek, it may be a long time until we get a change | |
941 | * to data phase so, in the absense of an explicit phase | |
942 | * change, we assume data phase will be coming up and tell | |
943 | * the SPC to start a transfer whenever it does. We'll get | |
944 | * a service required interrupt later if this assumption is | |
945 | * wrong. Otherwise we'll get a service required int when | |
946 | * the transfer changes to status phase. | |
947 | */ | |
948 | phase = CMD_PHASE; | |
949 | while (1) { | |
950 | register int wait = scsi_cmd_wait; | |
951 | ||
952 | switch (phase) { | |
953 | ||
954 | case CMD_PHASE: | |
955 | if (ixfer_start(hd, cdb->len, phase, wait)) | |
956 | if (ixfer_out(hd, cdb->len, cdb->cdb)) | |
957 | goto abort; | |
958 | break; | |
959 | ||
960 | case MESG_IN_PHASE: | |
961 | if (ixfer_start(hd, sizeof(hs->sc_msg), phase, wait)|| | |
962 | !(hd->scsi_ssts & SSTS_DREG_EMPTY)) { | |
963 | ixfer_in(hd, sizeof(hs->sc_msg), hs->sc_msg); | |
964 | hd->scsi_scmd = SCMD_RST_ACK; | |
965 | } | |
966 | phase = BUS_FREE_PHASE; | |
967 | break; | |
968 | ||
969 | case DATA_IN_PHASE: | |
970 | case DATA_OUT_PHASE: | |
971 | goto out; | |
972 | ||
973 | default: | |
974 | printf("scsi%d: unexpected phase %d in go from %d\n", | |
975 | hs->sc_hc->hp_unit, phase, slave); | |
976 | goto abort; | |
977 | } | |
978 | while ((ints = hd->scsi_ints) == 0) { | |
979 | if (--wait < 0) { | |
980 | HIST(sgo_wait, wait) | |
981 | goto abort; | |
982 | } | |
983 | DELAY(1); | |
984 | } | |
985 | HIST(sgo_wait, wait) | |
986 | hd->scsi_ints = ints; | |
987 | if (ints & INTS_SRV_REQ) | |
988 | phase = hd->scsi_psns & PHASE; | |
989 | else if (ints & INTS_CMD_DONE) | |
990 | goto out; | |
991 | else { | |
992 | scsierror(hs, hd, ints); | |
993 | goto abort; | |
994 | } | |
995 | } | |
996 | out: | |
997 | /* | |
998 | * Reset the card dma logic, setup the dma channel then | |
999 | * get the dio part of the card set for a dma xfer. | |
1000 | */ | |
1001 | hd->scsi_hconf = 0; | |
d989d7c8 | 1002 | cmd = CSR_IE; |
60f56dfc | 1003 | dmaflags = DMAGO_NOINT; |
d989d7c8 KM |
1004 | if (scsi_pridma) |
1005 | dmaflags |= DMAGO_PRI; | |
60f56dfc KM |
1006 | if (bp->b_flags & B_READ) |
1007 | dmaflags |= DMAGO_READ; | |
1008 | if ((hs->sc_flags & SCSI_DMA32) && | |
1009 | ((int)bp->b_un.b_addr & 3) == 0 && (bp->b_bcount & 3) == 0) { | |
1010 | cmd |= CSR_DMA32; | |
1011 | dmaflags |= DMAGO_LWORD; | |
1012 | } else | |
1013 | dmaflags |= DMAGO_WORD; | |
1014 | dmago(hs->sc_dq.dq_ctlr, bp->b_un.b_addr, bp->b_bcount, dmaflags); | |
1015 | ||
1016 | if (bp->b_flags & B_READ) { | |
1017 | cmd |= CSR_DMAIN; | |
1018 | phase = DATA_IN_PHASE; | |
1019 | } else | |
1020 | phase = DATA_OUT_PHASE; | |
d989d7c8 KM |
1021 | /* |
1022 | * DMA enable bits must be set after size and direction bits. | |
1023 | */ | |
60f56dfc | 1024 | hd->scsi_csr = cmd; |
d989d7c8 | 1025 | hd->scsi_csr |= (CSR_DE0 << hs->sc_dq.dq_ctlr); |
60f56dfc KM |
1026 | /* |
1027 | * Setup the SPC for the transfer. We don't want to take | |
1028 | * first a command complete then a service required interrupt | |
1029 | * at the end of the transfer so we try to disable the cmd | |
1030 | * complete by setting the transfer counter to more bytes | |
1031 | * than we expect. (XXX - This strategy may have to be | |
1032 | * modified to deal with devices that return variable length | |
1033 | * blocks, e.g., some tape drives.) | |
1034 | */ | |
1035 | cmd = SCMD_XFR; | |
1036 | i = (unsigned)bp->b_bcount; | |
1037 | if (pad) { | |
1038 | cmd |= SCMD_PAD; | |
1039 | /* | |
1040 | * XXX - If we don't do this, the last 2 or 4 bytes | |
1041 | * (depending on word/lword DMA) of a read get trashed. | |
1042 | * It looks like it is necessary for the DMA to complete | |
1043 | * before the SPC goes into "pad mode"??? Note: if we | |
1044 | * also do this on a write, the request never completes. | |
1045 | */ | |
1046 | if (bp->b_flags & B_READ) | |
1047 | i += 2; | |
1048 | #ifdef DEBUG | |
1049 | hs->sc_flags |= SCSI_PAD; | |
1050 | if (i & 1) | |
1051 | printf("scsi%d: odd byte count: %d bytes @ %d\n", | |
1052 | ctlr, i, bp->b_cylin); | |
1053 | #endif | |
1054 | } else | |
1055 | i += 4; | |
1056 | hd->scsi_tch = i >> 16; | |
1057 | hd->scsi_tcm = i >> 8; | |
1058 | hd->scsi_tcl = i; | |
1059 | hd->scsi_pctl = phase; | |
1060 | hd->scsi_tmod = 0; | |
1061 | hd->scsi_scmd = cmd; | |
1062 | hs->sc_flags |= SCSI_IO; | |
1063 | return (0); | |
1064 | abort: | |
1065 | scsiabort(hs, hd, "go"); | |
9acfa6cd | 1066 | hs->sc_flags &=~ SCSI_HAVEDMA; |
60f56dfc KM |
1067 | dmafree(&hs->sc_dq); |
1068 | return (1); | |
1069 | } | |
1070 | ||
1071 | void | |
1072 | scsidone(unit) | |
1073 | register int unit; | |
1074 | { | |
1075 | volatile register struct scsidevice *hd = | |
1076 | (struct scsidevice *)scsi_softc[unit].sc_hc->hp_addr; | |
1077 | ||
d989d7c8 KM |
1078 | #ifdef DEBUG |
1079 | if (scsi_debug) | |
1080 | printf("scsi%d: done called!\n"); | |
1081 | #endif | |
60f56dfc KM |
1082 | /* dma operation is done -- turn off card dma */ |
1083 | hd->scsi_csr &=~ (CSR_DE1|CSR_DE0); | |
1084 | } | |
1085 | ||
1086 | int | |
1087 | scsiintr(unit) | |
1088 | register int unit; | |
1089 | { | |
1090 | register struct scsi_softc *hs = &scsi_softc[unit]; | |
1091 | volatile register struct scsidevice *hd = | |
1092 | (struct scsidevice *)hs->sc_hc->hp_addr; | |
1093 | register u_char ints; | |
1094 | register struct devqueue *dq; | |
1095 | ||
1096 | if ((hd->scsi_csr & (CSR_IE|CSR_IR)) != (CSR_IE|CSR_IR)) | |
1097 | return (0); | |
1098 | ||
1099 | ints = hd->scsi_ints; | |
1100 | if ((ints & INTS_SRV_REQ) && (hs->sc_flags & SCSI_IO)) { | |
1101 | /* | |
1102 | * this should be the normal i/o completion case. | |
1103 | * get the status & cmd complete msg then let the | |
1104 | * device driver look at what happened. | |
1105 | */ | |
1106 | #ifdef DEBUG | |
1107 | int len = (hd->scsi_tch << 16) | (hd->scsi_tcm << 8) | | |
1108 | hd->scsi_tcl; | |
1109 | if (!(hs->sc_flags & SCSI_PAD)) | |
1110 | len -= 4; | |
60f56dfc KM |
1111 | hs->sc_flags &=~ SCSI_PAD; |
1112 | #endif | |
1113 | dq = hs->sc_sq.dq_forw; | |
98511a3b | 1114 | finishxfer(hs, hd, dq->dq_slave); |
9acfa6cd | 1115 | hs->sc_flags &=~ (SCSI_IO|SCSI_HAVEDMA); |
60f56dfc KM |
1116 | dmafree(&hs->sc_dq); |
1117 | (dq->dq_driver->d_intr)(dq->dq_unit, hs->sc_stat[0]); | |
1118 | } else { | |
1119 | /* Something unexpected happened -- deal with it. */ | |
1120 | hd->scsi_ints = ints; | |
1121 | hd->scsi_csr = 0; | |
1122 | scsierror(hs, hd, ints); | |
1123 | scsiabort(hs, hd, "intr"); | |
1124 | if (hs->sc_flags & SCSI_IO) { | |
9acfa6cd | 1125 | hs->sc_flags &=~ (SCSI_IO|SCSI_HAVEDMA); |
60f56dfc KM |
1126 | dmafree(&hs->sc_dq); |
1127 | dq = hs->sc_sq.dq_forw; | |
1128 | (dq->dq_driver->d_intr)(dq->dq_unit, -1); | |
1129 | } | |
1130 | } | |
1131 | return(1); | |
1132 | } | |
1133 | ||
1134 | void | |
1135 | scsifree(dq) | |
1136 | register struct devqueue *dq; | |
1137 | { | |
1138 | register struct devqueue *hq; | |
1139 | ||
1140 | hq = &scsi_softc[dq->dq_ctlr].sc_sq; | |
1141 | remque(dq); | |
1142 | if ((dq = hq->dq_forw) != hq) | |
1143 | (dq->dq_driver->d_start)(dq->dq_unit); | |
1144 | } | |
98511a3b KM |
1145 | |
1146 | /* | |
1147 | * (XXX) The following routine is needed for the SCSI tape driver | |
1148 | * to read odd-size records. | |
1149 | */ | |
1150 | ||
1151 | #include "st.h" | |
1152 | #if NST > 0 | |
1153 | int | |
1154 | scsi_tt_oddio(ctlr, slave, unit, buf, len, b_flags, freedma) | |
1155 | int ctlr, slave, unit, b_flags; | |
1156 | u_char *buf; | |
1157 | u_int len; | |
1158 | { | |
1159 | register struct scsi_softc *hs = &scsi_softc[ctlr]; | |
1160 | struct scsi_cdb6 cdb; | |
1161 | u_char iphase; | |
1162 | int stat; | |
1163 | ||
9acfa6cd MH |
1164 | #ifdef DEBUG |
1165 | if (freedma && (hs->sc_flags & SCSI_HAVEDMA) == 0 || | |
1166 | !freedma && (hs->sc_flags & SCSI_HAVEDMA)) | |
1167 | printf("oddio: freedma (%d) inconsistency (flags=%x)\n", | |
1168 | freedma, hs->sc_flags); | |
1169 | #endif | |
98511a3b KM |
1170 | /* |
1171 | * First free any DMA channel that was allocated. | |
1172 | * We can't use DMA to do this transfer. | |
1173 | */ | |
9acfa6cd MH |
1174 | if (freedma) { |
1175 | hs->sc_flags &=~ SCSI_HAVEDMA; | |
98511a3b | 1176 | dmafree(hs->sc_dq); |
9acfa6cd | 1177 | } |
98511a3b KM |
1178 | /* |
1179 | * Initialize command block | |
1180 | */ | |
1181 | bzero(&cdb, sizeof(cdb)); | |
1182 | cdb.lun = unit; | |
1183 | cdb.lbam = (len >> 16) & 0xff; | |
1184 | cdb.lbal = (len >> 8) & 0xff; | |
1185 | cdb.len = len & 0xff; | |
1186 | if (buf == 0) { | |
1187 | cdb.cmd = CMD_SPACE; | |
1188 | cdb.lun |= 0x00; | |
1189 | len = 0; | |
1190 | iphase = MESG_IN_PHASE; | |
1191 | } else if (b_flags & B_READ) { | |
1192 | cdb.cmd = CMD_READ; | |
1193 | iphase = DATA_IN_PHASE; | |
1194 | } else { | |
1195 | cdb.cmd = CMD_WRITE; | |
1196 | iphase = DATA_OUT_PHASE; | |
1197 | } | |
1198 | /* | |
1199 | * Perform command (with very long delays) | |
1200 | */ | |
1201 | scsi_delay(30000000); | |
1202 | stat = scsiicmd(hs, slave, &cdb, sizeof(cdb), buf, len, iphase); | |
1203 | scsi_delay(0); | |
1204 | return (stat); | |
1205 | } | |
1206 | #endif | |
60f56dfc | 1207 | #endif |